move old stuff

svn path=/; revision=559

1 files changed, 32093 insertions, 0 deletions

diff --git a/vserver-sources/old/2.3.0.11/4410_vs2.3.0.11.patch b/vserver-sources/old/2.3.0.11/4410_vs2.3.0.11.patch
new file mode 100644
index 0000000..9895121
--- /dev/null
+++ b/vserver-sources/old/2.3.0.11/4410_vs2.3.0.11.patch
@@ -0,0 +1,32093 @@
+Index: linux-2.6.20/Documentation/vserver/debug.txt
+===================================================================
+--- /dev/null
++++ linux-2.6.20/Documentation/vserver/debug.txt
+@@ -0,0 +1,154 @@
++
++debug_cvirt:
++
++ 2   4	"vx_map_tgid: %p/%llx: %d -> %d"
++	"vx_rmap_tgid: %p/%llx: %d -> %d"
++
++debug_dlim:
++
++ 0   1	"ALLOC (%p,#%d)%c inode (%d)"
++	"FREE  (%p,#%d)%c inode"
++ 1   2	"ALLOC (%p,#%d)%c %lld bytes (%d)"
++	"FREE  (%p,#%d)%c %lld bytes"
++ 2   4	"ADJUST: %lld,%lld on %ld,%ld [mult=%d]"
++ 3   8	"ext3_has_free_blocks(%p): %lu<%lu+1, %c, %u!=%u r=%d"
++	"ext3_has_free_blocks(%p): free=%lu, root=%lu"
++	"rcu_free_dl_info(%p)"
++ 4  10	"alloc_dl_info(%p,%d) = %p"
++	"dealloc_dl_info(%p)"
++	"get_dl_info(%p[#%d.%d])"
++	"put_dl_info(%p[#%d.%d])"
++ 5  20	"alloc_dl_info(%p,%d)*"
++ 6  40	"__hash_dl_info: %p[#%d]"
++	"__unhash_dl_info: %p[#%d]"
++ 7  80	"locate_dl_info(%p,#%d) = %p"
++
++debug_misc:
++
++ 0   1	"destroy_dqhash: %p [#0x%08x] c=%d"
++	"new_dqhash: %p [#0x%08x]"
++	"vroot[%d]_clr_dev: dev=%p[%lu,%d:%d]"
++	"vroot[%d]_get_real_bdev: dev=%p[%lu,%d:%d]"
++	"vroot[%d]_set_dev: dev=%p[%lu,%d:%d]"
++	"vroot_get_real_bdev not set"
++ 1   2	"cow_break_link(»%s«)"
++	"temp copy »%s«"
++ 2   4	"dentry_open(new): %p"
++	"dentry_open(old): %p"
++	"lookup_create(new): %p"
++	"old path »%s«"
++	"path_lookup(old): %d"
++	"vfs_create(new): %d"
++	"vfs_rename: %d"
++	"vfs_sendfile: %d"
++ 3   8	"fput(new_file=%p[#%d])"
++	"fput(old_file=%p[#%d])"
++ 4  10	"vx_info_kill(%p[#%d],%d,%d) = %d"
++	"vx_info_kill(%p[#%d],%d,%d)*"
++ 5  20	"vs_reboot(%p[#%d],%d)"
++ 6  40	"dropping task %p[#%u,%u] for %p[#%u,%u]"
++
++debug_net:
++
++ 2   4	"nx_addr_conflict(%p,%p) %d.%d,%d.%d"
++ 3   8	"inet_bind(%p) %d.%d.%d.%d, %d.%d.%d.%d, %d.%d.%d.%d"
++	"inet_bind(%p)* %p,%p;%lx %d.%d.%d.%d"
++ 4  10	"ip_route_connect(%p) %p,%p;%lx"
++ 5  20	"__addr_in_socket(%p,%d.%d.%d.%d) %p:%d.%d.%d.%d %p;%lx"
++ 6  40	"sk,egf: %p [#%d] (from %d)"
++	"sk,egn: %p [#%d] (from %d)"
++	"sk,req: %p [#%d] (from %d)"
++	"sk: %p [#%d] (from %d)"
++	"tw: %p [#%d] (from %d)"
++ 7  80	"__sock_recvmsg: %p[%p,%p,%p;%d]:%d/%d"
++	"__sock_sendmsg: %p[%p,%p,%p;%d]:%d/%d"
++
++debug_nid:
++
++ 0   1	"__lookup_nx_info(#%u): %p[#%u]"
++	"alloc_nx_info(%d) = %p"
++	"create_nx_info(%d) (dynamic rejected)"
++	"create_nx_info(%d) = %p (already there)"
++	"create_nx_info(%d) = %p (new)"
++	"dealloc_nx_info(%p)"
++ 1   2	"alloc_nx_info(%d)*"
++	"create_nx_info(%d)*"
++ 2   4	"get_nx_info(%p[#%d.%d])"
++	"put_nx_info(%p[#%d.%d])"
++ 3   8	"claim_nx_info(%p[#%d.%d.%d]) %p"
++	"clr_nx_info(%p[#%d.%d])"
++	"init_nx_info(%p[#%d.%d])"
++	"release_nx_info(%p[#%d.%d.%d]) %p"
++	"set_nx_info(%p[#%d.%d])"
++ 4  10	"__hash_nx_info: %p[#%d]"
++	"__nx_dynamic_id: [#%d]"
++	"__unhash_nx_info: %p[#%d.%d.%d]"
++ 5  20	"moved task %p into nxi:%p[#%d]"
++	"nx_migrate_task(%p,%p[#%d.%d.%d])"
++	"task_get_nx_info(%p)"
++ 6  40	"nx_clear_persistent(%p[#%d])"
++
++debug_quota:
++
++ 0   1	"quota_sync_dqh(%p,%d) discard inode %p"
++ 1   2	"quota_sync_dqh(%p,%d)"
++	"sync_dquots(%p,%d)"
++	"sync_dquots_dqh(%p,%d)"
++ 3   8	"do_quotactl(%p,%d,cmd=%d,id=%d,%p)"
++
++debug_switch:
++
++ 0   1	"vc: VCMD_%02d_%d[%d], %d,%p [%d,%d,%x,%x]"
++ 1   2	"vc: VCMD_%02d_%d[%d] = %08lx(%ld) [%d,%d]"
++ 4  10	"%s: (%s %s) returned %s with %d"
++
++debug_tag:
++
++ 7  80	"dx_parse_tag(»%s«): %d:#%d"
++	"dx_propagate_tag(%p[#%lu.%d]): %d,%d"
++
++debug_xid:
++
++ 0   1	"__lookup_vx_info(#%u): %p[#%u]"
++	"alloc_vx_info(%d) = %p"
++	"alloc_vx_info(%d)*"
++	"create_vx_info(%d) (dynamic rejected)"
++	"create_vx_info(%d) = %p (already there)"
++	"create_vx_info(%d) = %p (new)"
++	"dealloc_vx_info(%p)"
++	"loc_vx_info(%d) = %p (found)"
++	"loc_vx_info(%d) = %p (new)"
++	"loc_vx_info(%d) = %p (not available)"
++ 1   2	"create_vx_info(%d)*"
++	"loc_vx_info(%d)*"
++ 2   4	"get_vx_info(%p[#%d.%d])"
++	"put_vx_info(%p[#%d.%d])"
++ 3   8	"claim_vx_info(%p[#%d.%d.%d]) %p"
++	"clr_vx_info(%p[#%d.%d])"
++	"init_vx_info(%p[#%d.%d])"
++	"release_vx_info(%p[#%d.%d.%d]) %p"
++	"set_vx_info(%p[#%d.%d])"
++ 4  10	"__hash_vx_info: %p[#%d]"
++	"__unhash_vx_info: %p[#%d.%d.%d]"
++	"__vx_dynamic_id: [#%d]"
++ 5  20	"enter_vx_info(%p[#%d],%p) %p[#%d,%p]"
++	"leave_vx_info(%p[#%d,%p]) %p[#%d,%p]"
++	"moved task %p into vxi:%p[#%d]"
++	"task_get_vx_info(%p)"
++	"vx_migrate_task(%p,%p[#%d.%d])"
++ 6  40	"vx_clear_persistent(%p[#%d])"
++	"vx_exit_init(%p[#%d],%p[#%d,%d,%d])"
++	"vx_set_init(%p[#%d],%p[#%d,%d,%d])"
++	"vx_set_persistent(%p[#%d])"
++	"vx_set_reaper(%p[#%d],%p[#%d,%d])"
++ 7  80	"vx_child_reaper(%p[#%u,%u]) = %p[#%u,%u]"
++
++
++debug_limit:
++
++ n 2^n	"vx_acc_cres[%5d,%s,%2d]: %5d%s"
++	"vx_cres_avail[%5d,%s,%2d]: %5ld > %5d + %5d"
++
++ m 2^m	"vx_acc_page[%5d,%s,%2d]: %5d%s"
++	"vx_acc_pages[%5d,%s,%2d]: %5d += %5d"
++	"vx_pages_avail[%5d,%s,%2d]: %5ld > %5d + %5d"
+Index: linux-2.6.20/Makefile
+===================================================================
+--- linux-2.6.20.orig/Makefile
++++ linux-2.6.20/Makefile
+@@ -1,7 +1,7 @@
+ VERSION = 2
+ PATCHLEVEL = 6
+ SUBLEVEL = 20
+-EXTRAVERSION =
++EXTRAVERSION = -vs2.3.0.11-gentoo
+ NAME = Homicidal Dwarf Hamster
+ 
+ # *DOCUMENTATION*
+Index: linux-2.6.20/arch/alpha/Kconfig
+===================================================================
+--- linux-2.6.20.orig/arch/alpha/Kconfig
++++ linux-2.6.20/arch/alpha/Kconfig
+@@ -666,6 +666,8 @@ source "arch/alpha/oprofile/Kconfig"
+ 
+ source "arch/alpha/Kconfig.debug"
+ 
++source "kernel/vserver/Kconfig"
++
+ source "security/Kconfig"
+ 
+ source "crypto/Kconfig"
+Index: linux-2.6.20/arch/alpha/kernel/asm-offsets.c
+===================================================================
+--- linux-2.6.20.orig/arch/alpha/kernel/asm-offsets.c
++++ linux-2.6.20/arch/alpha/kernel/asm-offsets.c
+@@ -36,6 +36,7 @@ void foo(void)
+ 	DEFINE(PT_PTRACED, PT_PTRACED);
+ 	DEFINE(CLONE_VM, CLONE_VM);
+ 	DEFINE(CLONE_UNTRACED, CLONE_UNTRACED);
++	DEFINE(CLONE_KTHREAD, CLONE_KTHREAD);
+ 	DEFINE(SIGCHLD, SIGCHLD);
+ 	BLANK();
+ 
+Index: linux-2.6.20/arch/alpha/kernel/entry.S
+===================================================================
+--- linux-2.6.20.orig/arch/alpha/kernel/entry.S
++++ linux-2.6.20/arch/alpha/kernel/entry.S
+@@ -644,7 +644,7 @@ kernel_thread:
+ 	stq	$2, 152($sp)		/* HAE */
+ 
+ 	/* Shuffle FLAGS to the front; add CLONE_VM.  */
+-	ldi	$1, CLONE_VM|CLONE_UNTRACED
++	ldi	$1, CLONE_VM | CLONE_UNTRACED | CLONE_KTHREAD;
+ 	or	$18, $1, $16
+ 	bsr	$26, sys_clone
+ 
+@@ -873,24 +873,15 @@ sys_getxgid:
+ 	.globl	sys_getxpid
+ 	.ent	sys_getxpid
+ sys_getxpid:
++	lda	$sp, -16($sp)
++	stq	$26, 0($sp)
+ 	.prologue 0
+-	ldq	$2, TI_TASK($8)
+ 
+-	/* See linux/kernel/timer.c sys_getppid for discussion
+-	   about this loop.  */
+-	ldq	$3, TASK_GROUP_LEADER($2)
+-	ldq	$4, TASK_REAL_PARENT($3)
+-	ldl	$0, TASK_TGID($2)
+-1:	ldl	$1, TASK_TGID($4)
+-#ifdef CONFIG_SMP
+-	mov	$4, $5
+-	mb
+-	ldq	$3, TASK_GROUP_LEADER($2)
+-	ldq	$4, TASK_REAL_PARENT($3)
+-	cmpeq	$4, $5, $5
+-	beq	$5, 1b
+-#endif
+-	stq	$1, 80($sp)
++	lda	$16, 96($sp)
++	jsr	$26, do_getxpid
++	ldq	$26, 0($sp)
++
++	lda	$sp, 16($sp)
+ 	ret
+ .end sys_getxpid
+ 
+Index: linux-2.6.20/arch/alpha/kernel/osf_sys.c
+===================================================================
+--- linux-2.6.20.orig/arch/alpha/kernel/osf_sys.c
++++ linux-2.6.20/arch/alpha/kernel/osf_sys.c
+@@ -885,7 +885,7 @@ osf_gettimeofday(struct timeval32 __user
+ {
+ 	if (tv) {
+ 		struct timeval ktv;
+-		do_gettimeofday(&ktv);
++		vx_gettimeofday(&ktv);
+ 		if (put_tv32(tv, &ktv))
+ 			return -EFAULT;
+ 	}
+Index: linux-2.6.20/arch/alpha/kernel/ptrace.c
+===================================================================
+--- linux-2.6.20.orig/arch/alpha/kernel/ptrace.c
++++ linux-2.6.20/arch/alpha/kernel/ptrace.c
+@@ -15,6 +15,7 @@
+ #include <linux/slab.h>
+ #include <linux/security.h>
+ #include <linux/signal.h>
++#include <linux/vs_base.h>
+ 
+ #include <asm/uaccess.h>
+ #include <asm/pgtable.h>
+@@ -283,6 +284,11 @@ do_sys_ptrace(long request, long pid, lo
+ 		goto out_notsk;
+ 	}
+ 
++	if (!vx_check(vx_task_xid(child), VS_WATCH_P|VS_IDENT)) {
++		ret = -EPERM;
++		goto out;
++	}
++
+ 	if (request == PTRACE_ATTACH) {
+ 		ret = ptrace_attach(child);
+ 		goto out;
+Index: linux-2.6.20/arch/alpha/kernel/semaphore.c
+===================================================================
+--- linux-2.6.20.orig/arch/alpha/kernel/semaphore.c
++++ linux-2.6.20/arch/alpha/kernel/semaphore.c
+@@ -68,8 +68,8 @@ __down_failed(struct semaphore *sem)
+ 	DECLARE_WAITQUEUE(wait, tsk);
+ 
+ #ifdef CONFIG_DEBUG_SEMAPHORE
+-	printk("%s(%d): down failed(%p)\n",
+-	       tsk->comm, tsk->pid, sem);
++	printk("%s(%d:#%u): down failed(%p)\n",
++	       tsk->comm, tsk->pid, tsk->xid, sem);
+ #endif
+ 
+ 	tsk->state = TASK_UNINTERRUPTIBLE;
+@@ -97,8 +97,8 @@ __down_failed(struct semaphore *sem)
+ 	wake_up(&sem->wait);
+ 
+ #ifdef CONFIG_DEBUG_SEMAPHORE
+-	printk("%s(%d): down acquired(%p)\n",
+-	       tsk->comm, tsk->pid, sem);
++	printk("%s(%d:#%u): down acquired(%p)\n",
++	       tsk->comm, tsk->pid, tsk->xid, sem);
+ #endif
+ }
+ 
+@@ -110,8 +110,8 @@ __down_failed_interruptible(struct semap
+ 	long ret = 0;
+ 
+ #ifdef CONFIG_DEBUG_SEMAPHORE
+-	printk("%s(%d): down failed(%p)\n",
+-	       tsk->comm, tsk->pid, sem);
++	printk("%s(%d:#%u): down failed(%p)\n",
++	       tsk->comm, tsk->pid, tsk->xid, sem);
+ #endif
+ 
+ 	tsk->state = TASK_INTERRUPTIBLE;
+Index: linux-2.6.20/arch/alpha/kernel/systbls.S
+===================================================================
+--- linux-2.6.20.orig/arch/alpha/kernel/systbls.S
++++ linux-2.6.20/arch/alpha/kernel/systbls.S
+@@ -446,7 +446,7 @@ sys_call_table:
+ 	.quad sys_stat64			/* 425 */
+ 	.quad sys_lstat64
+ 	.quad sys_fstat64
+-	.quad sys_ni_syscall			/* sys_vserver */
++	.quad sys_vserver			/* sys_vserver */
+ 	.quad sys_ni_syscall			/* sys_mbind */
+ 	.quad sys_ni_syscall			/* sys_get_mempolicy */
+ 	.quad sys_ni_syscall			/* sys_set_mempolicy */
+Index: linux-2.6.20/arch/alpha/kernel/traps.c
+===================================================================
+--- linux-2.6.20.orig/arch/alpha/kernel/traps.c
++++ linux-2.6.20/arch/alpha/kernel/traps.c
+@@ -215,7 +215,8 @@ die_if_kernel(char * str, struct pt_regs
+ #ifdef CONFIG_SMP
+ 	printk("CPU %d ", hard_smp_processor_id());
+ #endif
+-	printk("%s(%d): %s %ld\n", current->comm, current->pid, str, err);
++	printk("%s(%d[#%u]): %s %ld\n", current->comm,
++		current->pid, current->xid, str, err);
+ 	dik_show_regs(regs, r9_15);
+ 	dik_show_trace((unsigned long *)(regs+1));
+ 	dik_show_code((unsigned int *)regs->pc);
+Index: linux-2.6.20/arch/alpha/mm/init.c
+===================================================================
+--- linux-2.6.20.orig/arch/alpha/mm/init.c
++++ linux-2.6.20/arch/alpha/mm/init.c
+@@ -20,6 +20,7 @@
+ #include <linux/init.h>
+ #include <linux/bootmem.h> /* max_low_pfn */
+ #include <linux/vmalloc.h>
++#include <linux/pagemap.h>
+ 
+ #include <asm/system.h>
+ #include <asm/uaccess.h>
+Index: linux-2.6.20/arch/arm/Kconfig
+===================================================================
+--- linux-2.6.20.orig/arch/arm/Kconfig
++++ linux-2.6.20/arch/arm/Kconfig
+@@ -971,6 +971,8 @@ source "arch/arm/oprofile/Kconfig"
+ 
+ source "arch/arm/Kconfig.debug"
+ 
++source "kernel/vserver/Kconfig"
++
+ source "security/Kconfig"
+ 
+ source "crypto/Kconfig"
+Index: linux-2.6.20/arch/arm/kernel/calls.S
+===================================================================
+--- linux-2.6.20.orig/arch/arm/kernel/calls.S
++++ linux-2.6.20/arch/arm/kernel/calls.S
+@@ -322,7 +322,7 @@
+ /* 310 */	CALL(sys_request_key)
+ 		CALL(sys_keyctl)
+ 		CALL(ABI(sys_semtimedop, sys_oabi_semtimedop))
+-/* vserver */	CALL(sys_ni_syscall)
++		CALL(sys_vserver)
+ 		CALL(sys_ioprio_set)
+ /* 315 */	CALL(sys_ioprio_get)
+ 		CALL(sys_inotify_init)
+Index: linux-2.6.20/arch/arm/kernel/process.c
+===================================================================
+--- linux-2.6.20.orig/arch/arm/kernel/process.c
++++ linux-2.6.20/arch/arm/kernel/process.c
+@@ -246,7 +246,8 @@ void __show_regs(struct pt_regs *regs)
+ void show_regs(struct pt_regs * regs)
+ {
+ 	printk("\n");
+-	printk("Pid: %d, comm: %20s\n", current->pid, current->comm);
++	printk("Pid: %d[#%u], comm: %20s\n",
++		current->pid, current->xid, current->comm);
+ 	__show_regs(regs);
+ 	__backtrace();
+ }
+@@ -408,7 +409,8 @@ pid_t kernel_thread(int (*fn)(void *), v
+ 	regs.ARM_pc = (unsigned long)kernel_thread_helper;
+ 	regs.ARM_cpsr = SVC_MODE;
+ 
+-	return do_fork(flags|CLONE_VM|CLONE_UNTRACED, 0, &regs, 0, NULL, NULL);
++	return do_fork(flags | CLONE_VM | CLONE_UNTRACED | CLONE_KTHREAD,
++		0, &regs, 0, NULL, NULL);
+ }
+ EXPORT_SYMBOL(kernel_thread);
+ 
+Index: linux-2.6.20/arch/arm/kernel/traps.c
+===================================================================
+--- linux-2.6.20.orig/arch/arm/kernel/traps.c
++++ linux-2.6.20/arch/arm/kernel/traps.c
+@@ -206,8 +206,8 @@ static void __die(const char *str, int e
+ 	printk("Internal error: %s: %x [#%d]\n", str, err, ++die_counter);
+ 	print_modules();
+ 	__show_regs(regs);
+-	printk("Process %s (pid: %d, stack limit = 0x%p)\n",
+-		tsk->comm, tsk->pid, thread + 1);
++	printk("Process %s (pid: %d:#%u, stack limit = 0x%p)\n",
++		tsk->comm, tsk->pid, tsk->xid, thread + 1);
+ 
+ 	if (!user_mode(regs) || in_interrupt()) {
+ 		dump_mem("Stack: ", regs->ARM_sp,
+Index: linux-2.6.20/arch/arm26/Kconfig
+===================================================================
+--- linux-2.6.20.orig/arch/arm26/Kconfig
++++ linux-2.6.20/arch/arm26/Kconfig
+@@ -242,6 +242,8 @@ source "drivers/usb/Kconfig"
+ 
+ source "arch/arm26/Kconfig.debug"
+ 
++source "kernel/vserver/Kconfig"
++
+ source "security/Kconfig"
+ 
+ source "crypto/Kconfig"
+Index: linux-2.6.20/arch/arm26/kernel/calls.S
+===================================================================
+--- linux-2.6.20.orig/arch/arm26/kernel/calls.S
++++ linux-2.6.20/arch/arm26/kernel/calls.S
+@@ -257,6 +257,11 @@ __syscall_start:
+ 		.long	sys_lremovexattr
+ 		.long	sys_fremovexattr
+ 		.long	sys_tkill
++
++		.rept	313 - (. - __syscall_start) / 4
++			.long	sys_ni_syscall
++		.endr
++		.long	sys_vserver	/* 313 */
+ __syscall_end:
+ 
+ 		.rept	NR_syscalls - (__syscall_end - __syscall_start) / 4
+Index: linux-2.6.20/arch/arm26/kernel/process.c
+===================================================================
+--- linux-2.6.20.orig/arch/arm26/kernel/process.c
++++ linux-2.6.20/arch/arm26/kernel/process.c
+@@ -365,7 +365,8 @@ pid_t kernel_thread(int (*fn)(void *), v
+         regs.ARM_r3 = (unsigned long)do_exit;
+         regs.ARM_pc = (unsigned long)kernel_thread_helper | MODE_SVC26;
+ 
+-        return do_fork(flags|CLONE_VM|CLONE_UNTRACED, 0, &regs, 0, NULL, NULL);
++	return do_fork(flags | CLONE_VM | CLONE_UNTRACED | CLONE_KTHREAD,
++		0, &regs, 0, NULL, NULL);
+ }
+ EXPORT_SYMBOL(kernel_thread);
+ 
+Index: linux-2.6.20/arch/arm26/kernel/traps.c
+===================================================================
+--- linux-2.6.20.orig/arch/arm26/kernel/traps.c
++++ linux-2.6.20/arch/arm26/kernel/traps.c
+@@ -185,8 +185,9 @@ NORET_TYPE void die(const char *str, str
+ 	printk("Internal error: %s: %x\n", str, err);
+ 	printk("CPU: %d\n", smp_processor_id());
+ 	show_regs(regs);
+-	printk("Process %s (pid: %d, stack limit = 0x%p)\n",
+-		current->comm, current->pid, end_of_stack(tsk));
++	printk("Process %s (pid: %d[#%u], stack limit = 0x%p)\n",
++		current->comm, current->pid,
++		current->xid, end_of_stack(tsk));
+ 
+ 	if (!user_mode(regs) || in_interrupt()) {
+ 		__dump_stack(tsk, (unsigned long)(regs + 1));
+Index: linux-2.6.20/arch/cris/Kconfig
+===================================================================
+--- linux-2.6.20.orig/arch/cris/Kconfig
++++ linux-2.6.20/arch/cris/Kconfig
+@@ -193,6 +193,8 @@ source "drivers/usb/Kconfig"
+ 
+ source "arch/cris/Kconfig.debug"
+ 
++source "kernel/vserver/Kconfig"
++
+ source "security/Kconfig"
+ 
+ source "crypto/Kconfig"
+Index: linux-2.6.20/arch/cris/arch-v10/kernel/process.c
+===================================================================
+--- linux-2.6.20.orig/arch/cris/arch-v10/kernel/process.c
++++ linux-2.6.20/arch/cris/arch-v10/kernel/process.c
+@@ -103,7 +103,8 @@ int kernel_thread(int (*fn)(void *), voi
+ 	regs.dccr = 1 << I_DCCR_BITNR;
+ 
+ 	/* Ok, create the new process.. */
+-        return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs, 0, NULL, NULL);
++	return do_fork(flags | CLONE_VM | CLONE_UNTRACED | CLONE_KTHREAD,
++		0, &regs, 0, NULL, NULL);
+ }
+ 
+ /* setup the child's kernel stack with a pt_regs and switch_stack on it.
+Index: linux-2.6.20/arch/cris/arch-v32/kernel/process.c
+===================================================================
+--- linux-2.6.20.orig/arch/cris/arch-v32/kernel/process.c
++++ linux-2.6.20/arch/cris/arch-v32/kernel/process.c
+@@ -120,7 +120,8 @@ kernel_thread(int (*fn)(void *), void * 
+ 	regs.ccs = 1 << (I_CCS_BITNR + CCS_SHIFT);
+ 
+ 	/* Create the new process. */
+-        return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs, 0, NULL, NULL);
++	return do_fork(flags | CLONE_VM | CLONE_UNTRACED | CLONE_KTHREAD,
++		0, &regs, 0, NULL, NULL);
+ }
+ 
+ /*
+Index: linux-2.6.20/arch/cris/kernel/irq.c
+===================================================================
+--- linux-2.6.20.orig/arch/cris/kernel/irq.c
++++ linux-2.6.20/arch/cris/kernel/irq.c
+@@ -92,6 +92,7 @@ skip:
+ asmlinkage void do_IRQ(int irq, struct pt_regs * regs)
+ {
+ 	unsigned long sp;
++
+ 	irq_enter();
+ 	sp = rdsp();
+ 	if (unlikely((sp & (PAGE_SIZE - 1)) < (PAGE_SIZE/8))) {
+Index: linux-2.6.20/arch/frv/kernel/kernel_thread.S
+===================================================================
+--- linux-2.6.20.orig/arch/frv/kernel/kernel_thread.S
++++ linux-2.6.20/arch/frv/kernel/kernel_thread.S
+@@ -13,6 +13,8 @@
+ #include <asm/unistd.h>
+ 
+ #define CLONE_VM	0x00000100	/* set if VM shared between processes */
++#define CLONE_KTHREAD	0x10000000	/* kernel thread */
++#define CLONE_KT	(CLONE_VM | CLONE_KTHREAD)	/* kernel thread flags */
+ #define	KERN_ERR	"<3>"
+ 
+ 	.section .rodata
+@@ -37,7 +39,7 @@ kernel_thread:
+ 
+ 	# start by forking the current process, but with shared VM
+ 	setlos.p	#__NR_clone,gr7		; syscall number
+-	ori		gr10,#CLONE_VM,gr8	; first syscall arg	[clone_flags]
++	ori		gr10,#CLONE_KT,gr8	; first syscall arg	[clone_flags]
+ 	sethi.p		#0xe4e4,gr9		; second syscall arg	[newsp]
+ 	setlo		#0xe4e4,gr9
+ 	setlos.p	#0,gr10			; third syscall arg	[parent_tidptr]
+Index: linux-2.6.20/arch/h8300/Kconfig
+===================================================================
+--- linux-2.6.20.orig/arch/h8300/Kconfig
++++ linux-2.6.20/arch/h8300/Kconfig
+@@ -207,6 +207,8 @@ source "fs/Kconfig"
+ 
+ source "arch/h8300/Kconfig.debug"
+ 
++source "kernel/vserver/Kconfig"
++
+ source "security/Kconfig"
+ 
+ source "crypto/Kconfig"
+Index: linux-2.6.20/arch/h8300/kernel/process.c
+===================================================================
+--- linux-2.6.20.orig/arch/h8300/kernel/process.c
++++ linux-2.6.20/arch/h8300/kernel/process.c
+@@ -134,7 +134,7 @@ int kernel_thread(int (*fn)(void *), voi
+ 
+ 	fs = get_fs();
+ 	set_fs (KERNEL_DS);
+-	clone_arg = flags | CLONE_VM;
++	clone_arg = flags | CLONE_VM | CLONE_KTHREAD;
+ 	__asm__("mov.l sp,er3\n\t"
+ 		"sub.l er2,er2\n\t"
+ 		"mov.l %2,er1\n\t"
+Index: linux-2.6.20/arch/i386/Kconfig
+===================================================================
+--- linux-2.6.20.orig/arch/i386/Kconfig
++++ linux-2.6.20/arch/i386/Kconfig
+@@ -1214,6 +1214,8 @@ endmenu
+ 
+ source "arch/i386/Kconfig.debug"
+ 
++source "kernel/vserver/Kconfig"
++
+ source "security/Kconfig"
+ 
+ source "crypto/Kconfig"
+Index: linux-2.6.20/arch/i386/kernel/irq.c
+===================================================================
+--- linux-2.6.20.orig/arch/i386/kernel/irq.c
++++ linux-2.6.20/arch/i386/kernel/irq.c
+@@ -84,7 +84,6 @@ fastcall unsigned int do_IRQ(struct pt_r
+ 		}
+ 	}
+ #endif
+-
+ #ifdef CONFIG_4KSTACKS
+ 
+ 	curctx = (union irq_ctx *) current_thread_info();
+@@ -124,7 +123,6 @@ fastcall unsigned int do_IRQ(struct pt_r
+ 	} else
+ #endif
+ 		desc->handle_irq(irq, desc);
+-
+ 	irq_exit();
+ 	set_irq_regs(old_regs);
+ 	return 1;
+Index: linux-2.6.20/arch/i386/kernel/process.c
+===================================================================
+--- linux-2.6.20.orig/arch/i386/kernel/process.c
++++ linux-2.6.20/arch/i386/kernel/process.c
+@@ -294,8 +294,10 @@ void show_regs(struct pt_regs * regs)
+ 	unsigned long cr0 = 0L, cr2 = 0L, cr3 = 0L, cr4 = 0L;
+ 
+ 	printk("\n");
+-	printk("Pid: %d, comm: %20s\n", current->pid, current->comm);
+-	printk("EIP: %04x:[<%08lx>] CPU: %d\n",0xffff & regs->xcs,regs->eip, smp_processor_id());
++	printk("Pid: %d[#%u], comm: %20s\n",
++		current->pid, current->xid, current->comm);
++	printk("EIP: %04x:[<%08lx>] CPU: %d\n",
++		0xffff & regs->xcs,regs->eip, smp_processor_id());
+ 	print_symbol("EIP is at %s\n", regs->eip);
+ 
+ 	if (user_mode_vm(regs))
+@@ -347,7 +349,8 @@ int kernel_thread(int (*fn)(void *), voi
+ 	regs.eflags = X86_EFLAGS_IF | X86_EFLAGS_SF | X86_EFLAGS_PF | 0x2;
+ 
+ 	/* Ok, create the new process.. */
+-	return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs, 0, NULL, NULL);
++	return do_fork(flags | CLONE_VM | CLONE_UNTRACED | CLONE_KTHREAD,
++		0, &regs, 0, NULL, NULL);
+ }
+ EXPORT_SYMBOL(kernel_thread);
+ 
+Index: linux-2.6.20/arch/i386/kernel/syscall_table.S
+===================================================================
+--- linux-2.6.20.orig/arch/i386/kernel/syscall_table.S
++++ linux-2.6.20/arch/i386/kernel/syscall_table.S
+@@ -272,7 +272,7 @@ ENTRY(sys_call_table)
+ 	.long sys_tgkill	/* 270 */
+ 	.long sys_utimes
+  	.long sys_fadvise64_64
+-	.long sys_ni_syscall	/* sys_vserver */
++	.long sys_vserver
+ 	.long sys_mbind
+ 	.long sys_get_mempolicy
+ 	.long sys_set_mempolicy
+Index: linux-2.6.20/arch/i386/kernel/sysenter.c
+===================================================================
+--- linux-2.6.20.orig/arch/i386/kernel/sysenter.c
++++ linux-2.6.20/arch/i386/kernel/sysenter.c
+@@ -17,6 +17,7 @@
+ #include <linux/elf.h>
+ #include <linux/mm.h>
+ #include <linux/module.h>
++#include <linux/vs_memory.h>
+ 
+ #include <asm/cpufeature.h>
+ #include <asm/msr.h>
+@@ -163,7 +164,7 @@ int arch_setup_additional_pages(struct l
+ 	current->mm->context.vdso = (void *)addr;
+ 	current_thread_info()->sysenter_return =
+ 				    (void *)VDSO_SYM(&SYSENTER_RETURN);
+-	mm->total_vm++;
++	vx_vmpages_inc(mm);
+ up_fail:
+ 	up_write(&mm->mmap_sem);
+ 	return ret;
+Index: linux-2.6.20/arch/i386/kernel/traps.c
+===================================================================
+--- linux-2.6.20.orig/arch/i386/kernel/traps.c
++++ linux-2.6.20/arch/i386/kernel/traps.c
+@@ -56,6 +56,8 @@
+ #include <asm/stacktrace.h>
+ 
+ #include <linux/module.h>
++#include <linux/vs_context.h>
++#include <linux/vserver/history.h>
+ 
+ #include "mach_traps.h"
+ 
+@@ -315,8 +317,8 @@ void show_registers(struct pt_regs *regs
+ 		regs->esi, regs->edi, regs->ebp, esp);
+ 	printk(KERN_EMERG "ds: %04x   es: %04x   ss: %04x\n",
+ 		regs->xds & 0xffff, regs->xes & 0xffff, ss);
+-	printk(KERN_EMERG "Process %.*s (pid: %d, ti=%p task=%p task.ti=%p)",
+-		TASK_COMM_LEN, current->comm, current->pid,
++	printk(KERN_EMERG "Process %.*s (pid: %d[#%u], ti=%p task=%p task.ti=%p)",
++		TASK_COMM_LEN, current->comm, current->pid, current->xid,
+ 		current_thread_info(), current, current->thread_info);
+ 	/*
+ 	 * When in-kernel, we also print out the stack and code at the
+@@ -386,6 +388,8 @@ void die(const char * str, struct pt_reg
+ 
+ 	oops_enter();
+ 
++	vxh_throw_oops();
++
+ 	if (die.lock_owner != raw_smp_processor_id()) {
+ 		console_verbose();
+ 		spin_lock_irqsave(&die.lock, flags);
+@@ -423,9 +427,9 @@ void die(const char * str, struct pt_reg
+ 		if (nl)
+ 			printk("\n");
+ 		if (notify_die(DIE_OOPS, str, regs, err,
+-					current->thread.trap_no, SIGSEGV) !=
+-				NOTIFY_STOP) {
++			current->thread.trap_no, SIGSEGV) != NOTIFY_STOP) {
+ 			show_registers(regs);
++			vxh_dump_history();
+ 			/* Executive summary in case the oops scrolled away */
+ 			esp = (unsigned long) (&regs->esp);
+ 			savesegment(ss, ss);
+Index: linux-2.6.20/arch/ia64/Kconfig
+===================================================================
+--- linux-2.6.20.orig/arch/ia64/Kconfig
++++ linux-2.6.20/arch/ia64/Kconfig
+@@ -568,6 +568,8 @@ endmenu
+ 
+ source "arch/ia64/Kconfig.debug"
+ 
++source "kernel/vserver/Kconfig"
++
+ source "security/Kconfig"
+ 
+ source "crypto/Kconfig"
+Index: linux-2.6.20/arch/ia64/ia32/binfmt_elf32.c
+===================================================================
+--- linux-2.6.20.orig/arch/ia64/ia32/binfmt_elf32.c
++++ linux-2.6.20/arch/ia64/ia32/binfmt_elf32.c
+@@ -238,7 +238,8 @@ ia32_setup_arg_pages (struct linux_binpr
+ 			kmem_cache_free(vm_area_cachep, mpnt);
+ 			return ret;
+ 		}
+-		current->mm->stack_vm = current->mm->total_vm = vma_pages(mpnt);
++		vx_vmpages_sub(current->mm, current->mm->total_vm - vma_pages(mpnt));
++		current->mm->stack_vm = current->mm->total_vm;
+ 	}
+ 
+ 	for (i = 0 ; i < MAX_ARG_PAGES ; i++) {
+Index: linux-2.6.20/arch/ia64/ia32/ia32_entry.S
+===================================================================
+--- linux-2.6.20.orig/arch/ia64/ia32/ia32_entry.S
++++ linux-2.6.20/arch/ia64/ia32/ia32_entry.S
+@@ -483,7 +483,7 @@ ia32_syscall_table:
+  	data8 sys_tgkill	/* 270 */
+  	data8 compat_sys_utimes
+  	data8 sys32_fadvise64_64
+- 	data8 sys_ni_syscall
++	data8 sys32_vserver
+   	data8 sys_ni_syscall
+  	data8 sys_ni_syscall	/* 275 */
+   	data8 sys_ni_syscall
+Index: linux-2.6.20/arch/ia64/ia32/sys_ia32.c
+===================================================================
+--- linux-2.6.20.orig/arch/ia64/ia32/sys_ia32.c
++++ linux-2.6.20/arch/ia64/ia32/sys_ia32.c
+@@ -1182,7 +1182,7 @@ sys32_gettimeofday (struct compat_timeva
+ {
+ 	if (tv) {
+ 		struct timeval ktv;
+-		do_gettimeofday(&ktv);
++		vx_gettimeofday(&ktv);
+ 		if (put_tv32(tv, &ktv))
+ 			return -EFAULT;
+ 	}
+Index: linux-2.6.20/arch/ia64/kernel/asm-offsets.c
+===================================================================
+--- linux-2.6.20.orig/arch/ia64/kernel/asm-offsets.c
++++ linux-2.6.20/arch/ia64/kernel/asm-offsets.c
+@@ -191,6 +191,7 @@ void foo(void)
+     /* for assembly files which can't include sched.h: */
+ 	DEFINE(IA64_CLONE_VFORK, CLONE_VFORK);
+ 	DEFINE(IA64_CLONE_VM, CLONE_VM);
++	DEFINE(IA64_CLONE_KTHREAD, CLONE_KTHREAD);
+ 
+ 	BLANK();
+ 	DEFINE(IA64_CPUINFO_NSEC_PER_CYC_OFFSET,
+Index: linux-2.6.20/arch/ia64/kernel/entry.S
+===================================================================
+--- linux-2.6.20.orig/arch/ia64/kernel/entry.S
++++ linux-2.6.20/arch/ia64/kernel/entry.S
+@@ -1576,7 +1576,7 @@ sys_call_table:
+ 	data8 sys_mq_notify
+ 	data8 sys_mq_getsetattr
+ 	data8 sys_kexec_load
+-	data8 sys_ni_syscall			// reserved for vserver
++	data8 sys_vserver
+ 	data8 sys_waitid			// 1270
+ 	data8 sys_add_key
+ 	data8 sys_request_key
+Index: linux-2.6.20/arch/ia64/kernel/perfmon.c
+===================================================================
+--- linux-2.6.20.orig/arch/ia64/kernel/perfmon.c
++++ linux-2.6.20/arch/ia64/kernel/perfmon.c
+@@ -41,6 +41,7 @@
+ #include <linux/capability.h>
+ #include <linux/rcupdate.h>
+ #include <linux/completion.h>
++#include <linux/vs_memory.h>
+ 
+ #include <asm/errno.h>
+ #include <asm/intrinsics.h>
+@@ -2356,7 +2357,7 @@ pfm_smpl_buffer_alloc(struct task_struct
+ 	 */
+ 	insert_vm_struct(mm, vma);
+ 
+-	mm->total_vm  += size >> PAGE_SHIFT;
++	vx_vmpages_add(mm, size >> PAGE_SHIFT);
+ 	vm_stat_account(vma->vm_mm, vma->vm_flags, vma->vm_file,
+ 							vma_pages(vma));
+ 	up_write(&task->mm->mmap_sem);
+Index: linux-2.6.20/arch/ia64/kernel/process.c
+===================================================================
+--- linux-2.6.20.orig/arch/ia64/kernel/process.c
++++ linux-2.6.20/arch/ia64/kernel/process.c
+@@ -105,7 +105,8 @@ show_regs (struct pt_regs *regs)
+ 	unsigned long ip = regs->cr_iip + ia64_psr(regs)->ri;
+ 
+ 	print_modules();
+-	printk("\nPid: %d, CPU %d, comm: %20s\n", current->pid, smp_processor_id(), current->comm);
++	printk("\nPid: %d[#%u], CPU %d, comm: %20s\n",
++		current->pid, current->xid, smp_processor_id(), current->comm);
+ 	printk("psr : %016lx ifs : %016lx ip  : [<%016lx>]    %s\n",
+ 	       regs->cr_ipsr, regs->cr_ifs, ip, print_tainted());
+ 	print_symbol("ip is at %s\n", ip);
+@@ -694,7 +695,8 @@ kernel_thread (int (*fn)(void *), void *
+ 	regs.sw.ar_fpsr = regs.pt.ar_fpsr = ia64_getreg(_IA64_REG_AR_FPSR);
+ 	regs.sw.ar_bspstore = (unsigned long) current + IA64_RBS_OFFSET;
+ 	regs.sw.pr = (1 << PRED_KERNEL_STACK);
+-	return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs.pt, 0, NULL, NULL);
++	return do_fork(flags | CLONE_VM | CLONE_UNTRACED | CLONE_KTHREAD,
++		0, &regs.pt, 0, NULL, NULL);
+ }
+ EXPORT_SYMBOL(kernel_thread);
+ 
+Index: linux-2.6.20/arch/ia64/kernel/ptrace.c
+===================================================================
+--- linux-2.6.20.orig/arch/ia64/kernel/ptrace.c
++++ linux-2.6.20/arch/ia64/kernel/ptrace.c
+@@ -17,6 +17,7 @@
+ #include <linux/security.h>
+ #include <linux/audit.h>
+ #include <linux/signal.h>
++#include <linux/vs_base.h>
+ 
+ #include <asm/pgtable.h>
+ #include <asm/processor.h>
+@@ -1442,6 +1443,9 @@ sys_ptrace (long request, pid_t pid, uns
+ 	read_unlock(&tasklist_lock);
+ 	if (!child)
+ 		goto out;
++	if (!vx_check(vx_task_xid(child), VS_WATCH_P|VS_IDENT))
++		goto out_tsk;
++
+ 	ret = -EPERM;
+ 	if (pid == 1)		/* no messing around with init! */
+ 		goto out_tsk;
+Index: linux-2.6.20/arch/ia64/kernel/traps.c
+===================================================================
+--- linux-2.6.20.orig/arch/ia64/kernel/traps.c
++++ linux-2.6.20/arch/ia64/kernel/traps.c
+@@ -106,8 +106,9 @@ die (const char *str, struct pt_regs *re
+ 	put_cpu();
+ 
+ 	if (++die.lock_owner_depth < 3) {
+-		printk("%s[%d]: %s %ld [%d]\n",
+-			current->comm, current->pid, str, err, ++die_counter);
++		printk("%s[%d[#%u]]: %s %ld [%d]\n",
++			current->comm, current->pid, current->xid,
++			str, err, ++die_counter);
+ 		(void) notify_die(DIE_OOPS, (char *)str, regs, err, 255, SIGSEGV);
+ 		show_regs(regs);
+   	} else
+@@ -359,8 +360,9 @@ handle_fpu_swa (int fp_fault, struct pt_
+ 			if ((last.count & 15) < 5 && (ia64_fetchadd(1, &last.count, acq) & 15) < 5) {
+ 				last.time = current_jiffies + 5 * HZ;
+ 				printk(KERN_WARNING
+-		       			"%s(%d): floating-point assist fault at ip %016lx, isr %016lx\n",
+-		       			current->comm, current->pid, regs->cr_iip + ia64_psr(regs)->ri, isr);
++					"%s(%d[#%u]): floating-point assist fault at ip %016lx, isr %016lx\n",
++					current->comm, current->pid, current->xid,
++					regs->cr_iip + ia64_psr(regs)->ri, isr);
+ 			}
+ 		}
+ 	}
+Index: linux-2.6.20/arch/ia64/mm/fault.c
+===================================================================
+--- linux-2.6.20.orig/arch/ia64/mm/fault.c
++++ linux-2.6.20/arch/ia64/mm/fault.c
+@@ -10,6 +10,7 @@
+ #include <linux/smp_lock.h>
+ #include <linux/interrupt.h>
+ #include <linux/kprobes.h>
++#include <linux/vs_memory.h>
+ 
+ #include <asm/pgtable.h>
+ #include <asm/processor.h>
+Index: linux-2.6.20/arch/ia64/sn/kernel/xpc_main.c
+===================================================================
+--- linux-2.6.20.orig/arch/ia64/sn/kernel/xpc_main.c
++++ linux-2.6.20/arch/ia64/sn/kernel/xpc_main.c
+@@ -108,6 +108,7 @@ static ctl_table xpc_sys_xpc_hb_dir[] = 
+ 		0644,
+ 		NULL,
+ 		&proc_dointvec_minmax,
++		NULL,
+ 		&sysctl_intvec,
+ 		NULL,
+ 		&xpc_hb_min_interval,
+@@ -121,6 +122,7 @@ static ctl_table xpc_sys_xpc_hb_dir[] = 
+ 		0644,
+ 		NULL,
+ 		&proc_dointvec_minmax,
++		NULL,
+ 		&sysctl_intvec,
+ 		NULL,
+ 		&xpc_hb_check_min_interval,
+@@ -145,6 +147,7 @@ static ctl_table xpc_sys_xpc_dir[] = {
+ 		0644,
+ 		NULL,
+ 		&proc_dointvec_minmax,
++		NULL,
+ 		&sysctl_intvec,
+ 		NULL,
+ 		&xpc_disengage_request_min_timelimit,
+Index: linux-2.6.20/arch/m32r/kernel/irq.c
+===================================================================
+--- linux-2.6.20.orig/arch/m32r/kernel/irq.c
++++ linux-2.6.20/arch/m32r/kernel/irq.c
+@@ -78,6 +78,7 @@ skip:
+ asmlinkage unsigned int do_IRQ(int irq, struct pt_regs *regs)
+ {
+ 	struct pt_regs *old_regs;
++
+ 	old_regs = set_irq_regs(regs);
+ 	irq_enter();
+ 
+Index: linux-2.6.20/arch/m32r/kernel/process.c
+===================================================================
+--- linux-2.6.20.orig/arch/m32r/kernel/process.c
++++ linux-2.6.20/arch/m32r/kernel/process.c
+@@ -211,8 +211,8 @@ int kernel_thread(int (*fn)(void *), voi
+ 	regs.psw = M32R_PSW_BIE;
+ 
+ 	/* Ok, create the new process. */
+-	return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs, 0, NULL,
+-		NULL);
++	return do_fork(flags | CLONE_VM | CLONE_UNTRACED | CLONE_KTHREAD,
++		0, &regs, 0, NULL, NULL);
+ }
+ 
+ /*
+Index: linux-2.6.20/arch/m32r/kernel/traps.c
+===================================================================
+--- linux-2.6.20.orig/arch/m32r/kernel/traps.c
++++ linux-2.6.20/arch/m32r/kernel/traps.c
+@@ -195,8 +195,9 @@ static void show_registers(struct pt_reg
+ 	} else {
+ 		printk("SPI: %08lx\n", sp);
+ 	}
+-	printk("Process %s (pid: %d, process nr: %d, stackpage=%08lx)",
+-		current->comm, current->pid, 0xffff & i, 4096+(unsigned long)current);
++	printk("Process %s (pid: %d[#%u], process nr: %d, stackpage=%08lx)",
++		current->comm, current->pid, current->xid,
++		0xffff & i, 4096+(unsigned long)current);
+ 
+ 	/*
+ 	 * When in-kernel, we also print out the stack and code at the
+Index: linux-2.6.20/arch/m68k/Kconfig
+===================================================================
+--- linux-2.6.20.orig/arch/m68k/Kconfig
++++ linux-2.6.20/arch/m68k/Kconfig
+@@ -662,6 +662,8 @@ source "fs/Kconfig"
+ 
+ source "arch/m68k/Kconfig.debug"
+ 
++source "kernel/vserver/Kconfig"
++
+ source "security/Kconfig"
+ 
+ source "crypto/Kconfig"
+Index: linux-2.6.20/arch/m68k/kernel/process.c
+===================================================================
+--- linux-2.6.20.orig/arch/m68k/kernel/process.c
++++ linux-2.6.20/arch/m68k/kernel/process.c
+@@ -159,7 +159,8 @@ int kernel_thread(int (*fn)(void *), voi
+ 
+ 	{
+ 	register long retval __asm__ ("d0");
+-	register long clone_arg __asm__ ("d1") = flags | CLONE_VM | CLONE_UNTRACED;
++	register long clone_arg __asm__ ("d1") =
++		flags | CLONE_VM | CLONE_UNTRACED | CLONE_KTHREAD;
+ 
+ 	retval = __NR_clone;
+ 	__asm__ __volatile__
+Index: linux-2.6.20/arch/m68k/kernel/ptrace.c
+===================================================================
+--- linux-2.6.20.orig/arch/m68k/kernel/ptrace.c
++++ linux-2.6.20/arch/m68k/kernel/ptrace.c
+@@ -19,6 +19,7 @@
+ #include <linux/ptrace.h>
+ #include <linux/user.h>
+ #include <linux/signal.h>
++#include <linux/vs_base.h>
+ 
+ #include <asm/uaccess.h>
+ #include <asm/page.h>
+@@ -279,6 +280,8 @@ long arch_ptrace(struct task_struct *chi
+ 		ret = ptrace_request(child, request, addr, data);
+ 		break;
+ 	}
++	if (!vx_check(vx_task_xid(child), VS_WATCH_P|VS_IDENT))
++		goto out_tsk;
+ 
+ 	return ret;
+ out_eio:
+Index: linux-2.6.20/arch/m68k/kernel/traps.c
+===================================================================
+--- linux-2.6.20.orig/arch/m68k/kernel/traps.c
++++ linux-2.6.20/arch/m68k/kernel/traps.c
+@@ -899,8 +899,8 @@ void show_registers(struct pt_regs *regs
+ 	printk("d4: %08lx    d5: %08lx    a0: %08lx    a1: %08lx\n",
+ 	       regs->d4, regs->d5, regs->a0, regs->a1);
+ 
+-	printk("Process %s (pid: %d, task=%p)\n",
+-		current->comm, current->pid, current);
++	printk("Process %s (pid: %d[#%u], task=%p)\n",
++		current->comm, current->pid, current->xid, current);
+ 	addr = (unsigned long)&fp->un;
+ 	printk("Frame format=%X ", regs->format);
+ 	switch (regs->format) {
+Index: linux-2.6.20/arch/m68knommu/Kconfig
+===================================================================
+--- linux-2.6.20.orig/arch/m68knommu/Kconfig
++++ linux-2.6.20/arch/m68knommu/Kconfig
+@@ -671,6 +671,8 @@ source "fs/Kconfig"
+ 
+ source "arch/m68knommu/Kconfig.debug"
+ 
++source "kernel/vserver/Kconfig"
++
+ source "security/Kconfig"
+ 
+ source "crypto/Kconfig"
+Index: linux-2.6.20/arch/m68knommu/kernel/process.c
+===================================================================
+--- linux-2.6.20.orig/arch/m68knommu/kernel/process.c
++++ linux-2.6.20/arch/m68knommu/kernel/process.c
+@@ -122,7 +122,7 @@ void show_regs(struct pt_regs * regs)
+ int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
+ {
+ 	int retval;
+-	long clone_arg = flags | CLONE_VM;
++	long clone_arg = flags | CLONE_VM | CLONE_KTHREAD;
+ 	mm_segment_t fs;
+ 
+ 	fs = get_fs();
+Index: linux-2.6.20/arch/m68knommu/kernel/traps.c
+===================================================================
+--- linux-2.6.20.orig/arch/m68knommu/kernel/traps.c
++++ linux-2.6.20/arch/m68knommu/kernel/traps.c
+@@ -80,8 +80,9 @@ void die_if_kernel(char *str, struct pt_
+ 	printk(KERN_EMERG "d4: %08lx    d5: %08lx    a0: %08lx    a1: %08lx\n",
+ 	       fp->d4, fp->d5, fp->a0, fp->a1);
+ 
+-	printk(KERN_EMERG "Process %s (pid: %d, stackpage=%08lx)\n",
+-		current->comm, current->pid, PAGE_SIZE+(unsigned long)current);
++	printk(KERN_EMERG "Process %s (pid: %d[#%u], stackpage=%08lx)\n",
++		current->comm, current->pid, current->xid,
++		PAGE_SIZE+(unsigned long)current);
+ 	show_stack(NULL, (unsigned long *)fp);
+ 	do_exit(SIGSEGV);
+ }
+Index: linux-2.6.20/arch/mips/Kconfig
+===================================================================
+--- linux-2.6.20.orig/arch/mips/Kconfig
++++ linux-2.6.20/arch/mips/Kconfig
+@@ -2084,6 +2084,8 @@ source "arch/mips/oprofile/Kconfig"
+ 
+ source "arch/mips/Kconfig.debug"
+ 
++source "kernel/vserver/Kconfig"
++
+ source "security/Kconfig"
+ 
+ source "crypto/Kconfig"
+Index: linux-2.6.20/arch/mips/kernel/linux32.c
+===================================================================
+--- linux-2.6.20.orig/arch/mips/kernel/linux32.c
++++ linux-2.6.20/arch/mips/kernel/linux32.c
+@@ -300,7 +300,7 @@ sys32_gettimeofday(struct compat_timeval
+ {
+ 	if (tv) {
+ 		struct timeval ktv;
+-		do_gettimeofday(&ktv);
++		vx_gettimeofday(&ktv);
+ 		if (put_tv32(tv, &ktv))
+ 			return -EFAULT;
+ 	}
+Index: linux-2.6.20/arch/mips/kernel/process.c
+===================================================================
+--- linux-2.6.20.orig/arch/mips/kernel/process.c
++++ linux-2.6.20/arch/mips/kernel/process.c
+@@ -271,7 +271,8 @@ long kernel_thread(int (*fn)(void *), vo
+ #endif
+ 
+ 	/* Ok, create the new process.. */
+-	return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs, 0, NULL, NULL);
++	return do_fork(flags | CLONE_VM | CLONE_UNTRACED | CLONE_KTHREAD,
++		0, &regs, 0, NULL, NULL);
+ }
+ 
+ /*
+Index: linux-2.6.20/arch/mips/kernel/ptrace.c
+===================================================================
+--- linux-2.6.20.orig/arch/mips/kernel/ptrace.c
++++ linux-2.6.20/arch/mips/kernel/ptrace.c
+@@ -26,6 +26,7 @@
+ #include <linux/user.h>
+ #include <linux/security.h>
+ #include <linux/signal.h>
++#include <linux/vs_base.h>
+ 
+ #include <asm/byteorder.h>
+ #include <asm/cpu.h>
+@@ -172,6 +173,9 @@ long arch_ptrace(struct task_struct *chi
+ {
+ 	int ret;
+ 
++	if (!vx_check(vx_task_xid(child), VS_WATCH_P|VS_IDENT))
++		goto out;
++
+ 	switch (request) {
+ 	/* when I and D space are separate, these will need to be fixed. */
+ 	case PTRACE_PEEKTEXT: /* read word at location addr. */
+Index: linux-2.6.20/arch/mips/kernel/scall32-o32.S
+===================================================================
+--- linux-2.6.20.orig/arch/mips/kernel/scall32-o32.S
++++ linux-2.6.20/arch/mips/kernel/scall32-o32.S
+@@ -619,7 +619,7 @@ einval:	li	v0, -EINVAL
+ 	sys	sys_mq_timedreceive	5
+ 	sys	sys_mq_notify		2	/* 4275 */
+ 	sys	sys_mq_getsetattr	3
+-	sys	sys_ni_syscall		0	/* sys_vserver */
++	sys	sys_vserver		3
+ 	sys	sys_waitid		5
+ 	sys	sys_ni_syscall		0	/* available, was setaltroot */
+ 	sys	sys_add_key		5	/* 4280 */
+Index: linux-2.6.20/arch/mips/kernel/scall64-64.S
+===================================================================
+--- linux-2.6.20.orig/arch/mips/kernel/scall64-64.S
++++ linux-2.6.20/arch/mips/kernel/scall64-64.S
+@@ -434,7 +434,7 @@ sys_call_table:
+ 	PTR	sys_mq_timedreceive
+ 	PTR	sys_mq_notify
+ 	PTR	sys_mq_getsetattr		/* 5235 */
+-	PTR	sys_ni_syscall			/* sys_vserver */
++	PTR	sys_vserver
+ 	PTR	sys_waitid
+ 	PTR	sys_ni_syscall			/* available, was setaltroot */
+ 	PTR	sys_add_key
+Index: linux-2.6.20/arch/mips/kernel/scall64-n32.S
+===================================================================
+--- linux-2.6.20.orig/arch/mips/kernel/scall64-n32.S
++++ linux-2.6.20/arch/mips/kernel/scall64-n32.S
+@@ -360,7 +360,7 @@ EXPORT(sysn32_call_table)
+ 	PTR	compat_sys_mq_timedreceive
+ 	PTR	compat_sys_mq_notify
+ 	PTR	compat_sys_mq_getsetattr
+-	PTR	sys_ni_syscall			/* 6240, sys_vserver */
++	PTR	sys32_vserver			/* 6240 */
+ 	PTR	sysn32_waitid
+ 	PTR	sys_ni_syscall			/* available, was setaltroot */
+ 	PTR	sys_add_key
+Index: linux-2.6.20/arch/mips/kernel/scall64-o32.S
+===================================================================
+--- linux-2.6.20.orig/arch/mips/kernel/scall64-o32.S
++++ linux-2.6.20/arch/mips/kernel/scall64-o32.S
+@@ -482,7 +482,7 @@ sys_call_table:
+ 	PTR	compat_sys_mq_timedreceive
+ 	PTR	compat_sys_mq_notify		/* 4275 */
+ 	PTR	compat_sys_mq_getsetattr
+-	PTR	sys_ni_syscall			/* sys_vserver */
++	PTR	sys32_vserver
+ 	PTR	sys32_waitid
+ 	PTR	sys_ni_syscall			/* available, was setaltroot */
+ 	PTR	sys_add_key			/* 4280 */
+Index: linux-2.6.20/arch/mips/kernel/traps.c
+===================================================================
+--- linux-2.6.20.orig/arch/mips/kernel/traps.c
++++ linux-2.6.20/arch/mips/kernel/traps.c
+@@ -299,8 +299,9 @@ void show_registers(struct pt_regs *regs
+ {
+ 	show_regs(regs);
+ 	print_modules();
+-	printk("Process %s (pid: %d, threadinfo=%p, task=%p)\n",
+-	        current->comm, current->pid, current_thread_info(), current);
++	printk("Process %s (pid: %d:#%u, threadinfo=%p, task=%p)\n",
++		current->comm, current->pid, current->xid,
++		current_thread_info(), current);
+ 	show_stacktrace(current, regs);
+ 	show_code((unsigned int *) regs->cp0_epc);
+ 	printk("\n");
+Index: linux-2.6.20/arch/parisc/Kconfig
+===================================================================
+--- linux-2.6.20.orig/arch/parisc/Kconfig
++++ linux-2.6.20/arch/parisc/Kconfig
+@@ -265,6 +265,8 @@ source "arch/parisc/oprofile/Kconfig"
+ 
+ source "arch/parisc/Kconfig.debug"
+ 
++source "kernel/vserver/Kconfig"
++
+ source "security/Kconfig"
+ 
+ source "crypto/Kconfig"
+Index: linux-2.6.20/arch/parisc/kernel/entry.S
+===================================================================
+--- linux-2.6.20.orig/arch/parisc/kernel/entry.S
++++ linux-2.6.20/arch/parisc/kernel/entry.S
+@@ -761,6 +761,7 @@ fault_vector_11:
+ 
+ #define CLONE_VM 0x100	/* Must agree with <linux/sched.h> */
+ #define CLONE_UNTRACED 0x00800000
++#define CLONE_KTHREAD 0x10000000
+ 
+ 	.export __kernel_thread, code
+ 	.import do_fork
+Index: linux-2.6.20/arch/parisc/kernel/process.c
+===================================================================
+--- linux-2.6.20.orig/arch/parisc/kernel/process.c
++++ linux-2.6.20/arch/parisc/kernel/process.c
+@@ -173,7 +173,7 @@ pid_t kernel_thread(int (*fn)(void *), v
+ 	 *	  kernel_thread can become a #define.
+ 	 */
+ 
+-	return __kernel_thread(fn, arg, flags);
++	return __kernel_thread(fn, arg, flags | CLONE_KTHREAD);
+ }
+ EXPORT_SYMBOL(kernel_thread);
+ 
+Index: linux-2.6.20/arch/parisc/kernel/sys_parisc32.c
+===================================================================
+--- linux-2.6.20.orig/arch/parisc/kernel/sys_parisc32.c
++++ linux-2.6.20/arch/parisc/kernel/sys_parisc32.c
+@@ -204,11 +204,11 @@ static inline long get_ts32(struct times
+ asmlinkage int
+ sys32_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
+ {
+-    extern void do_gettimeofday(struct timeval *tv);
++    extern void vx_gettimeofday(struct timeval *tv);
+ 
+     if (tv) {
+ 	    struct timeval ktv;
+-	    do_gettimeofday(&ktv);
++	    vx_gettimeofday(&ktv);
+ 	    if (put_compat_timeval(tv, &ktv))
+ 		    return -EFAULT;
+     }
+@@ -612,6 +612,7 @@ asmlinkage int sys32_sysinfo(struct sysi
+ 
+ 	do {
+ 		seq = read_seqbegin(&xtime_lock);
++		/* TODO: requires vx virtualization */
+ 		val.uptime = jiffies / HZ;
+ 
+ 		val.loads[0] = avenrun[0] << (SI_LOAD_SHIFT - FSHIFT);
+Index: linux-2.6.20/arch/parisc/kernel/syscall_table.S
+===================================================================
+--- linux-2.6.20.orig/arch/parisc/kernel/syscall_table.S
++++ linux-2.6.20/arch/parisc/kernel/syscall_table.S
+@@ -368,7 +368,7 @@
+ 	ENTRY_COMP(mbind)		/* 260 */
+ 	ENTRY_COMP(get_mempolicy)
+ 	ENTRY_COMP(set_mempolicy)
+-	ENTRY_SAME(ni_syscall)	/* 263: reserved for vserver */
++	ENTRY_DIFF(vserver)
+ 	ENTRY_SAME(add_key)
+ 	ENTRY_SAME(request_key)		/* 265 */
+ 	ENTRY_SAME(keyctl)
+Index: linux-2.6.20/arch/parisc/kernel/traps.c
+===================================================================
+--- linux-2.6.20.orig/arch/parisc/kernel/traps.c
++++ linux-2.6.20/arch/parisc/kernel/traps.c
+@@ -210,8 +210,9 @@ void die_if_kernel(char *str, struct pt_
+ 		if (err == 0)
+ 			return; /* STFU */
+ 
+-		printk(KERN_CRIT "%s (pid %d): %s (code %ld) at " RFMT "\n",
+-			current->comm, current->pid, str, err, regs->iaoq[0]);
++		printk(KERN_CRIT "%s (pid %d:#%u): %s (code %ld) at " RFMT "\n",
++			current->comm, current->pid, current->xid,
++			str, err, regs->iaoq[0]);
+ #ifdef PRINT_USER_FAULTS
+ 		/* XXX for debugging only */
+ 		show_regs(regs);
+@@ -242,8 +243,8 @@ void die_if_kernel(char *str, struct pt_
+ 	if (!console_drivers)
+ 		pdc_console_restart();
+ 	
+-	printk(KERN_CRIT "%s (pid %d): %s (code %ld)\n",
+-		current->comm, current->pid, str, err);
++	printk(KERN_CRIT "%s (pid %d:#%u): %s (code %ld)\n",
++		current->comm, current->pid, current->xid, str, err);
+ 	show_regs(regs);
+ 
+ 	if (in_interrupt())
+Index: linux-2.6.20/arch/parisc/mm/fault.c
+===================================================================
+--- linux-2.6.20.orig/arch/parisc/mm/fault.c
++++ linux-2.6.20/arch/parisc/mm/fault.c
+@@ -213,8 +213,9 @@ bad_area:
+ 
+ #ifdef PRINT_USER_FAULTS
+ 		printk(KERN_DEBUG "\n");
+-		printk(KERN_DEBUG "do_page_fault() pid=%d command='%s' type=%lu address=0x%08lx\n",
+-		    tsk->pid, tsk->comm, code, address);
++		printk(KERN_DEBUG "do_page_fault() pid=%d:#%u "
++		    "command='%s' type=%lu address=0x%08lx\n",
++		    tsk->pid, tsk->xid, tsk->comm, code, address);
+ 		if (vma) {
+ 			printk(KERN_DEBUG "vm_start = 0x%08lx, vm_end = 0x%08lx\n",
+ 					vma->vm_start, vma->vm_end);
+Index: linux-2.6.20/arch/powerpc/Kconfig
+===================================================================
+--- linux-2.6.20.orig/arch/powerpc/Kconfig
++++ linux-2.6.20/arch/powerpc/Kconfig
+@@ -1193,6 +1193,8 @@ endmenu
+ 
+ source "arch/powerpc/Kconfig.debug"
+ 
++source "kernel/vserver/Kconfig"
++
+ source "security/Kconfig"
+ 
+ config KEYS_COMPAT
+Index: linux-2.6.20/arch/powerpc/kernel/asm-offsets.c
+===================================================================
+--- linux-2.6.20.orig/arch/powerpc/kernel/asm-offsets.c
++++ linux-2.6.20/arch/powerpc/kernel/asm-offsets.c
+@@ -244,6 +244,7 @@ int main(void)
+ 
+ 	DEFINE(CLONE_VM, CLONE_VM);
+ 	DEFINE(CLONE_UNTRACED, CLONE_UNTRACED);
++	DEFINE(CLONE_KTHREAD, CLONE_KTHREAD);
+ 
+ #ifndef CONFIG_PPC64
+ 	DEFINE(MM_PGD, offsetof(struct mm_struct, pgd));
+Index: linux-2.6.20/arch/powerpc/kernel/irq.c
+===================================================================
+--- linux-2.6.20.orig/arch/powerpc/kernel/irq.c
++++ linux-2.6.20/arch/powerpc/kernel/irq.c
+@@ -53,6 +53,7 @@
+ #include <linux/mutex.h>
+ #include <linux/bootmem.h>
+ #include <linux/pci.h>
++#include <linux/vs_context.h>
+ 
+ #include <asm/uaccess.h>
+ #include <asm/system.h>
+Index: linux-2.6.20/arch/powerpc/kernel/misc_32.S
+===================================================================
+--- linux-2.6.20.orig/arch/powerpc/kernel/misc_32.S
++++ linux-2.6.20/arch/powerpc/kernel/misc_32.S
+@@ -749,7 +749,7 @@ _GLOBAL(kernel_thread)
+ 	mr	r30,r3		/* function */
+ 	mr	r31,r4		/* argument */
+ 	ori	r3,r5,CLONE_VM	/* flags */
+-	oris	r3,r3,CLONE_UNTRACED>>16
++	oris	r3,r3,(CLONE_UNTRACED|CLONE_KTHREAD)>>16
+ 	li	r4,0		/* new sp (unused) */
+ 	li	r0,__NR_clone
+ 	sc
+Index: linux-2.6.20/arch/powerpc/kernel/misc_64.S
+===================================================================
+--- linux-2.6.20.orig/arch/powerpc/kernel/misc_64.S
++++ linux-2.6.20/arch/powerpc/kernel/misc_64.S
+@@ -394,7 +394,7 @@ _GLOBAL(kernel_thread)
+ 	mr	r29,r3
+ 	mr	r30,r4
+ 	ori	r3,r5,CLONE_VM	/* flags */
+-	oris	r3,r3,(CLONE_UNTRACED>>16)
++	oris	r3,r3,(CLONE_UNTRACED|CLONE_KTHREAD)>>16
+ 	li	r4,0		/* new sp (unused) */
+ 	li	r0,__NR_clone
+ 	sc
+Index: linux-2.6.20/arch/powerpc/kernel/process.c
+===================================================================
+--- linux-2.6.20.orig/arch/powerpc/kernel/process.c
++++ linux-2.6.20/arch/powerpc/kernel/process.c
+@@ -425,8 +425,9 @@ void show_regs(struct pt_regs * regs)
+ 	trap = TRAP(regs);
+ 	if (trap == 0x300 || trap == 0x600)
+ 		printk("DAR: "REG", DSISR: "REG"\n", regs->dar, regs->dsisr);
+-	printk("TASK = %p[%d] '%s' THREAD: %p",
+-	       current, current->pid, current->comm, task_thread_info(current));
++	printk("TASK = %p[%d,#%u] '%s' THREAD: %p",
++	       current, current->pid, current->xid,
++	       current->comm, task_thread_info(current));
+ 
+ #ifdef CONFIG_SMP
+ 	printk(" CPU: %d", smp_processor_id());
+Index: linux-2.6.20/arch/powerpc/kernel/sys_ppc32.c
+===================================================================
+--- linux-2.6.20.orig/arch/powerpc/kernel/sys_ppc32.c
++++ linux-2.6.20/arch/powerpc/kernel/sys_ppc32.c
+@@ -276,7 +276,7 @@ asmlinkage long compat_sys_gettimeofday(
+ {
+ 	if (tv) {
+ 		struct timeval ktv;
+-		do_gettimeofday(&ktv);
++		vx_gettimeofday(&ktv);
+ 		if (put_tv32(tv, &ktv))
+ 			return -EFAULT;
+ 	}
+Index: linux-2.6.20/arch/powerpc/kernel/traps.c
+===================================================================
+--- linux-2.6.20.orig/arch/powerpc/kernel/traps.c
++++ linux-2.6.20/arch/powerpc/kernel/traps.c
+@@ -844,8 +844,9 @@ void nonrecoverable_exception(struct pt_
+ 
+ void trace_syscall(struct pt_regs *regs)
+ {
+-	printk("Task: %p(%d), PC: %08lX/%08lX, Syscall: %3ld, Result: %s%ld    %s\n",
+-	       current, current->pid, regs->nip, regs->link, regs->gpr[0],
++	printk("Task: %p(%d[#%u]), PC: %08lX/%08lX, Syscall: %3ld, Result: %s%ld    %s\n",
++	       current, current->pid, current->xid,
++	       regs->nip, regs->link, regs->gpr[0],
+ 	       regs->ccr&0x10000000?"Error=":"", regs->gpr[3], print_tainted());
+ }
+ 
+Index: linux-2.6.20/arch/powerpc/kernel/vdso.c
+===================================================================
+--- linux-2.6.20.orig/arch/powerpc/kernel/vdso.c
++++ linux-2.6.20/arch/powerpc/kernel/vdso.c
+@@ -22,6 +22,7 @@
+ #include <linux/elf.h>
+ #include <linux/security.h>
+ #include <linux/bootmem.h>
++#include <linux/vs_memory.h>
+ 
+ #include <asm/pgtable.h>
+ #include <asm/system.h>
+@@ -302,7 +303,7 @@ int arch_setup_additional_pages(struct l
+ 
+ 	/* Put vDSO base into mm struct and account for memory usage */
+ 	current->mm->context.vdso_base = vdso_base;
+-	mm->total_vm += (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
++	vx_vmpages_add(mm, (vma->vm_end - vma->vm_start) >> PAGE_SHIFT);
+ 	up_write(&mm->mmap_sem);
+ 	return 0;
+ 
+Index: linux-2.6.20/arch/ppc/Kconfig
+===================================================================
+--- linux-2.6.20.orig/arch/ppc/Kconfig
++++ linux-2.6.20/arch/ppc/Kconfig
+@@ -1445,6 +1445,8 @@ source "arch/powerpc/oprofile/Kconfig"
+ 
+ source "arch/ppc/Kconfig.debug"
+ 
++source "kernel/vserver/Kconfig"
++
+ source "security/Kconfig"
+ 
+ source "crypto/Kconfig"
+Index: linux-2.6.20/arch/ppc/kernel/asm-offsets.c
+===================================================================
+--- linux-2.6.20.orig/arch/ppc/kernel/asm-offsets.c
++++ linux-2.6.20/arch/ppc/kernel/asm-offsets.c
+@@ -121,6 +121,7 @@ main(void)
+ 	DEFINE(TRAP, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, trap));
+ 	DEFINE(CLONE_VM, CLONE_VM);
+ 	DEFINE(CLONE_UNTRACED, CLONE_UNTRACED);
++	DEFINE(CLONE_KTHREAD, CLONE_KTHREAD);
+ 	DEFINE(MM_PGD, offsetof(struct mm_struct, pgd));
+ 
+ 	/* About the CPU features table */
+Index: linux-2.6.20/arch/ppc/kernel/misc.S
+===================================================================
+--- linux-2.6.20.orig/arch/ppc/kernel/misc.S
++++ linux-2.6.20/arch/ppc/kernel/misc.S
+@@ -848,7 +848,7 @@ _GLOBAL(kernel_thread)
+ 	mr	r30,r3		/* function */
+ 	mr	r31,r4		/* argument */
+ 	ori	r3,r5,CLONE_VM	/* flags */
+-	oris	r3,r3,CLONE_UNTRACED>>16
++	oris	r3,r3,(CLONE_UNTRACED|CLONE_KTHREAD)>>16
+ 	li	r4,0		/* new sp (unused) */
+ 	li	r0,__NR_clone
+ 	sc
+Index: linux-2.6.20/arch/ppc/kernel/traps.c
+===================================================================
+--- linux-2.6.20.orig/arch/ppc/kernel/traps.c
++++ linux-2.6.20/arch/ppc/kernel/traps.c
+@@ -696,8 +696,9 @@ void nonrecoverable_exception(struct pt_
+ 
+ void trace_syscall(struct pt_regs *regs)
+ {
+-	printk("Task: %p(%d), PC: %08lX/%08lX, Syscall: %3ld, Result: %s%ld    %s\n",
+-	       current, current->pid, regs->nip, regs->link, regs->gpr[0],
++	printk("Task: %p(%d[#%u]), PC: %08lX/%08lX, Syscall: %3ld, Result: %s%ld    %s\n",
++	       current, current->pid, current->xid,
++	       regs->nip, regs->link, regs->gpr[0],
+ 	       regs->ccr&0x10000000?"Error=":"", regs->gpr[3], print_tainted());
+ }
+ 
+Index: linux-2.6.20/arch/s390/Kconfig
+===================================================================
+--- linux-2.6.20.orig/arch/s390/Kconfig
++++ linux-2.6.20/arch/s390/Kconfig
+@@ -522,6 +522,8 @@ endmenu
+ 
+ source "arch/s390/Kconfig.debug"
+ 
++source "kernel/vserver/Kconfig"
++
+ source "security/Kconfig"
+ 
+ source "crypto/Kconfig"
+Index: linux-2.6.20/arch/s390/kernel/compat_linux.c
+===================================================================
+--- linux-2.6.20.orig/arch/s390/kernel/compat_linux.c
++++ linux-2.6.20/arch/s390/kernel/compat_linux.c
+@@ -600,7 +600,7 @@ asmlinkage long sys32_gettimeofday(struc
+ {
+ 	if (tv) {
+ 		struct timeval ktv;
+-		do_gettimeofday(&ktv);
++		vx_gettimeofday(&ktv);
+ 		if (put_tv32(tv, &ktv))
+ 			return -EFAULT;
+ 	}
+Index: linux-2.6.20/arch/s390/kernel/process.c
+===================================================================
+--- linux-2.6.20.orig/arch/s390/kernel/process.c
++++ linux-2.6.20/arch/s390/kernel/process.c
+@@ -165,9 +165,9 @@ void show_regs(struct pt_regs *regs)
+ 	struct task_struct *tsk = current;
+ 
+         printk("CPU:    %d    %s\n", task_thread_info(tsk)->cpu, print_tainted());
+-        printk("Process %s (pid: %d, task: %p, ksp: %p)\n",
+-	       current->comm, current->pid, (void *) tsk,
+-	       (void *) tsk->thread.ksp);
++	printk("Process %s (pid: %d[#%u], task: %p, ksp: %p)\n",
++	       current->comm, current->pid, current->xid,
++	       (void *) tsk, (void *) tsk->thread.ksp);
+ 
+ 	show_registers(regs);
+ 	/* Show stack backtrace if pt_regs is from kernel mode */
+@@ -198,7 +198,7 @@ int kernel_thread(int (*fn)(void *), voi
+ 	regs.orig_gpr2 = -1;
+ 
+ 	/* Ok, create the new process.. */
+-	return do_fork(flags | CLONE_VM | CLONE_UNTRACED,
++	return do_fork(flags | CLONE_VM | CLONE_UNTRACED | CLONE_KTHREAD,
+ 		       0, &regs, 0, NULL, NULL);
+ }
+ 
+Index: linux-2.6.20/arch/s390/kernel/ptrace.c
+===================================================================
+--- linux-2.6.20.orig/arch/s390/kernel/ptrace.c
++++ linux-2.6.20/arch/s390/kernel/ptrace.c
+@@ -33,6 +33,7 @@
+ #include <linux/security.h>
+ #include <linux/audit.h>
+ #include <linux/signal.h>
++#include <linux/vs_base.h>
+ 
+ #include <asm/segment.h>
+ #include <asm/page.h>
+@@ -723,7 +724,13 @@ sys_ptrace(long request, long pid, long 
+ 		goto out;
+ 	}
+ 
++	if (!vx_check(vx_task_xid(child), VS_WATCH_P|VS_IDENT)) {
++		ret = -EPERM;
++		goto out_tsk;
++	}
++
+ 	ret = do_ptrace(child, request, addr, data);
++out_tsk:
+ 	put_task_struct(child);
+ out:
+ 	unlock_kernel();
+Index: linux-2.6.20/arch/s390/kernel/syscalls.S
+===================================================================
+--- linux-2.6.20.orig/arch/s390/kernel/syscalls.S
++++ linux-2.6.20/arch/s390/kernel/syscalls.S
+@@ -271,7 +271,7 @@ SYSCALL(sys_clock_settime,sys_clock_sett
+ SYSCALL(sys_clock_gettime,sys_clock_gettime,sys32_clock_gettime_wrapper)	/* 260 */
+ SYSCALL(sys_clock_getres,sys_clock_getres,sys32_clock_getres_wrapper)
+ SYSCALL(sys_clock_nanosleep,sys_clock_nanosleep,sys32_clock_nanosleep_wrapper)
+-NI_SYSCALL							/* reserved for vserver */
++SYSCALL(sys_vserver,sys_vserver,sys32_vserver)
+ SYSCALL(s390_fadvise64_64,sys_ni_syscall,sys32_fadvise64_64_wrapper)
+ SYSCALL(sys_statfs64,sys_statfs64,compat_sys_statfs64_wrapper)
+ SYSCALL(sys_fstatfs64,sys_fstatfs64,compat_sys_fstatfs64_wrapper)
+Index: linux-2.6.20/arch/sh/Kconfig
+===================================================================
+--- linux-2.6.20.orig/arch/sh/Kconfig
++++ linux-2.6.20/arch/sh/Kconfig
+@@ -709,6 +709,8 @@ source "arch/sh/oprofile/Kconfig"
+ 
+ source "arch/sh/Kconfig.debug"
+ 
++source "kernel/vserver/Kconfig"
++
+ source "security/Kconfig"
+ 
+ source "crypto/Kconfig"
+Index: linux-2.6.20/arch/sh/kernel/irq.c
+===================================================================
+--- linux-2.6.20.orig/arch/sh/kernel/irq.c
++++ linux-2.6.20/arch/sh/kernel/irq.c
+@@ -13,6 +13,7 @@
+ #include <linux/seq_file.h>
+ #include <linux/io.h>
+ #include <linux/irq.h>
++#include <linux/vs_context.h>
+ #include <asm/processor.h>
+ #include <asm/uaccess.h>
+ #include <asm/thread_info.h>
+Index: linux-2.6.20/arch/sh/kernel/kgdb_stub.c
+===================================================================
+--- linux-2.6.20.orig/arch/sh/kernel/kgdb_stub.c
++++ linux-2.6.20/arch/sh/kernel/kgdb_stub.c
+@@ -389,7 +389,7 @@ static struct task_struct *get_thread(in
+ 	if (pid == PID_MAX) pid = 0;
+ 
+ 	/* First check via PID */
+-	thread = find_task_by_pid(pid);
++	thread = find_task_by_real_pid(pid);
+ 
+ 	if (thread)
+ 		return thread;
+Index: linux-2.6.20/arch/sh/kernel/process.c
+===================================================================
+--- linux-2.6.20.orig/arch/sh/kernel/process.c
++++ linux-2.6.20/arch/sh/kernel/process.c
+@@ -104,7 +104,8 @@ void machine_power_off(void)
+ void show_regs(struct pt_regs * regs)
+ {
+ 	printk("\n");
+-	printk("Pid : %d, Comm: %20s\n", current->pid, current->comm);
++	printk("Pid : %d:#%u, Comm: %20s\n",
++		current->pid, current->xid, current->comm);
+ 	print_symbol("PC is at %s\n", instruction_pointer(regs));
+ 	printk("PC  : %08lx SP  : %08lx SR  : %08lx ",
+ 	       regs->pc, regs->regs[15], regs->sr);
+@@ -164,7 +165,8 @@ int kernel_thread(int (*fn)(void *), voi
+ 	regs.sr = (1 << 30);
+ 
+ 	/* Ok, create the new process.. */
+-	return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs, 0, NULL, NULL);
++	return do_fork(flags | CLONE_VM | CLONE_UNTRACED | CLONE_KTHREAD,
++		0, &regs, 0, NULL, NULL);
+ }
+ 
+ /*
+Index: linux-2.6.20/arch/sh/kernel/vsyscall/vsyscall.c
+===================================================================
+--- linux-2.6.20.orig/arch/sh/kernel/vsyscall/vsyscall.c
++++ linux-2.6.20/arch/sh/kernel/vsyscall/vsyscall.c
+@@ -17,6 +17,7 @@
+ #include <linux/gfp.h>
+ #include <linux/module.h>
+ #include <linux/elf.h>
++#include <linux/vs_memory.h>
+ 
+ /*
+  * Should the kernel map a VDSO page into processes and pass its
+@@ -120,7 +121,7 @@ int arch_setup_additional_pages(struct l
+ 
+ 	current->mm->context.vdso = (void *)addr;
+ 
+-	mm->total_vm++;
++	vx_vmpages_inc(mm);
+ up_fail:
+ 	up_write(&mm->mmap_sem);
+ 	return ret;
+Index: linux-2.6.20/arch/sh64/kernel/process.c
+===================================================================
+--- linux-2.6.20.orig/arch/sh64/kernel/process.c
++++ linux-2.6.20/arch/sh64/kernel/process.c
+@@ -400,8 +400,8 @@ int kernel_thread(int (*fn)(void *), voi
+ 	regs.pc = (unsigned long)kernel_thread_helper;
+ 	regs.sr = (1 << 30);
+ 
+-	return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0,
+-		       &regs, 0, NULL, NULL);
++	return do_fork(flags | CLONE_VM | CLONE_UNTRACED | CLONE_KTHREAD,
++		0, &regs, 0, NULL, NULL);
+ }
+ 
+ /*
+Index: linux-2.6.20/arch/sh64/mm/fault.c
+===================================================================
+--- linux-2.6.20.orig/arch/sh64/mm/fault.c
++++ linux-2.6.20/arch/sh64/mm/fault.c
+@@ -82,7 +82,7 @@ static inline void print_vma(struct vm_a
+ 
+ static inline void print_task(struct task_struct *tsk)
+ {
+-	printk("Task pid %d\n", tsk->pid);
++	printk("Task pid %d:#%u\n", tsk->pid, tsk->xid);
+ }
+ 
+ static pte_t *lookup_pte(struct mm_struct *mm, unsigned long address)
+Index: linux-2.6.20/arch/sparc/Kconfig
+===================================================================
+--- linux-2.6.20.orig/arch/sparc/Kconfig
++++ linux-2.6.20/arch/sparc/Kconfig
+@@ -306,6 +306,8 @@ endmenu
+ 
+ source "arch/sparc/Kconfig.debug"
+ 
++source "kernel/vserver/Kconfig"
++
+ source "security/Kconfig"
+ 
+ source "crypto/Kconfig"
+Index: linux-2.6.20/arch/sparc/kernel/process.c
+===================================================================
+--- linux-2.6.20.orig/arch/sparc/kernel/process.c
++++ linux-2.6.20/arch/sparc/kernel/process.c
+@@ -706,7 +706,8 @@ pid_t kernel_thread(int (*fn)(void *), v
+ 			     /* Notreached by child. */
+ 			     "1: mov %%o0, %0\n\t" :
+ 			     "=r" (retval) :
+-			     "i" (__NR_clone), "r" (flags | CLONE_VM | CLONE_UNTRACED),
++			     "i" (__NR_clone), "r" (flags |
++					CLONE_VM | CLONE_UNTRACED | CLONE_KTHREAD),
+ 			     "i" (__NR_exit),  "r" (fn), "r" (arg) :
+ 			     "g1", "g2", "g3", "o0", "o1", "memory", "cc");
+ 	return retval;
+Index: linux-2.6.20/arch/sparc/kernel/ptrace.c
+===================================================================
+--- linux-2.6.20.orig/arch/sparc/kernel/ptrace.c
++++ linux-2.6.20/arch/sparc/kernel/ptrace.c
+@@ -19,6 +19,7 @@
+ #include <linux/smp_lock.h>
+ #include <linux/security.h>
+ #include <linux/signal.h>
++#include <linux/vs_base.h>
+ 
+ #include <asm/pgtable.h>
+ #include <asm/system.h>
+@@ -302,6 +303,10 @@ asmlinkage void do_ptrace(struct pt_regs
+ 		pt_error_return(regs, -ret);
+ 		goto out;
+ 	}
++	if (!vx_check(vx_task_xid(child), VS_WATCH_P|VS_IDENT)) {
++		pt_error_return(regs, ESRCH);
++		goto out_tsk;
++	}
+ 
+ 	if ((current->personality == PER_SUNOS && request == PTRACE_SUNATTACH)
+ 	    || (current->personality != PER_SUNOS && request == PTRACE_ATTACH)) {
+Index: linux-2.6.20/arch/sparc/kernel/systbls.S
+===================================================================
+--- linux-2.6.20.orig/arch/sparc/kernel/systbls.S
++++ linux-2.6.20/arch/sparc/kernel/systbls.S
+@@ -71,7 +71,7 @@ sys_call_table:
+ /*250*/	.long sparc_mremap, sys_sysctl, sys_getsid, sys_fdatasync, sys_nfsservctl
+ /*255*/	.long sys_sync_file_range, sys_clock_settime, sys_clock_gettime, sys_clock_getres, sys_clock_nanosleep
+ /*260*/	.long sys_sched_getaffinity, sys_sched_setaffinity, sys_timer_settime, sys_timer_gettime, sys_timer_getoverrun
+-/*265*/	.long sys_timer_delete, sys_timer_create, sys_nis_syscall, sys_io_setup, sys_io_destroy
++/*265*/	.long sys_timer_delete, sys_timer_create, sys_vserver, sys_io_setup, sys_io_destroy
+ /*270*/	.long sys_io_submit, sys_io_cancel, sys_io_getevents, sys_mq_open, sys_mq_unlink
+ /*275*/	.long sys_mq_timedsend, sys_mq_timedreceive, sys_mq_notify, sys_mq_getsetattr, sys_waitid
+ /*280*/	.long sys_tee, sys_add_key, sys_request_key, sys_keyctl, sys_openat
+Index: linux-2.6.20/arch/sparc/kernel/traps.c
+===================================================================
+--- linux-2.6.20.orig/arch/sparc/kernel/traps.c
++++ linux-2.6.20/arch/sparc/kernel/traps.c
+@@ -99,7 +99,8 @@ void die_if_kernel(char *str, struct pt_
+ "              /_| \\__/ |_\\\n"
+ "                 \\__U_/\n");
+ 
+-	printk("%s(%d): %s [#%d]\n", current->comm, current->pid, str, ++die_counter);
++	printk("%s(%d[#%u]): %s [#%d]\n", current->comm,
++		current->pid, current->xid, str, ++die_counter);
+ 	show_regs(regs);
+ 
+ 	__SAVE; __SAVE; __SAVE; __SAVE;
+Index: linux-2.6.20/arch/sparc64/Kconfig
+===================================================================
+--- linux-2.6.20.orig/arch/sparc64/Kconfig
++++ linux-2.6.20/arch/sparc64/Kconfig
+@@ -447,6 +447,8 @@ endmenu
+ 
+ source "arch/sparc64/Kconfig.debug"
+ 
++source "kernel/vserver/Kconfig"
++
+ source "security/Kconfig"
+ 
+ source "crypto/Kconfig"
+Index: linux-2.6.20/arch/sparc64/kernel/binfmt_aout32.c
+===================================================================
+--- linux-2.6.20.orig/arch/sparc64/kernel/binfmt_aout32.c
++++ linux-2.6.20/arch/sparc64/kernel/binfmt_aout32.c
+@@ -27,6 +27,7 @@
+ #include <linux/binfmts.h>
+ #include <linux/personality.h>
+ #include <linux/init.h>
++#include <linux/vs_memory.h>
+ 
+ #include <asm/system.h>
+ #include <asm/uaccess.h>
+Index: linux-2.6.20/arch/sparc64/kernel/process.c
+===================================================================
+--- linux-2.6.20.orig/arch/sparc64/kernel/process.c
++++ linux-2.6.20/arch/sparc64/kernel/process.c
+@@ -696,7 +696,8 @@ pid_t kernel_thread(int (*fn)(void *), v
+ 			     /* Notreached by child. */
+ 			     "1:" :
+ 			     "=r" (retval) :
+-			     "i" (__NR_clone), "r" (flags | CLONE_VM | CLONE_UNTRACED),
++			     "i" (__NR_clone), "r" (flags |
++				CLONE_VM | CLONE_UNTRACED | CLONE_KTHREAD),
+ 			     "i" (__NR_exit),  "r" (fn), "r" (arg) :
+ 			     "g1", "g2", "g3", "o0", "o1", "memory", "cc");
+ 	return retval;
+Index: linux-2.6.20/arch/sparc64/kernel/ptrace.c
+===================================================================
+--- linux-2.6.20.orig/arch/sparc64/kernel/ptrace.c
++++ linux-2.6.20/arch/sparc64/kernel/ptrace.c
+@@ -22,6 +22,7 @@
+ #include <linux/seccomp.h>
+ #include <linux/audit.h>
+ #include <linux/signal.h>
++#include <linux/vs_base.h>
+ 
+ #include <asm/asi.h>
+ #include <asm/pgtable.h>
+@@ -215,6 +216,10 @@ asmlinkage void do_ptrace(struct pt_regs
+ 		pt_error_return(regs, -ret);
+ 		goto out;
+ 	}
++	if (!vx_check(vx_task_xid(child), VS_WATCH_P|VS_IDENT)) {
++		pt_error_return(regs, ESRCH);
++		goto out_tsk;
++	}
+ 
+ 	if ((current->personality == PER_SUNOS && request == PTRACE_SUNATTACH)
+ 	    || (current->personality != PER_SUNOS && request == PTRACE_ATTACH)) {
+Index: linux-2.6.20/arch/sparc64/kernel/sys_sparc32.c
+===================================================================
+--- linux-2.6.20.orig/arch/sparc64/kernel/sys_sparc32.c
++++ linux-2.6.20/arch/sparc64/kernel/sys_sparc32.c
+@@ -793,7 +793,7 @@ asmlinkage long sys32_gettimeofday(struc
+ {
+ 	if (tv) {
+ 		struct timeval ktv;
+-		do_gettimeofday(&ktv);
++		vx_gettimeofday(&ktv);
+ 		if (put_tv32(tv, &ktv))
+ 			return -EFAULT;
+ 	}
+Index: linux-2.6.20/arch/sparc64/kernel/systbls.S
+===================================================================
+--- linux-2.6.20.orig/arch/sparc64/kernel/systbls.S
++++ linux-2.6.20/arch/sparc64/kernel/systbls.S
+@@ -72,7 +72,7 @@ sys_call_table32:
+ /*250*/	.word sys32_mremap, sys32_sysctl, sys32_getsid, sys_fdatasync, sys32_nfsservctl
+ 	.word sys32_sync_file_range, compat_sys_clock_settime, compat_sys_clock_gettime, compat_sys_clock_getres, sys32_clock_nanosleep
+ /*260*/	.word compat_sys_sched_getaffinity, compat_sys_sched_setaffinity, sys32_timer_settime, compat_sys_timer_gettime, sys_timer_getoverrun
+-	.word sys_timer_delete, compat_sys_timer_create, sys_ni_syscall, compat_sys_io_setup, sys_io_destroy
++	.word sys_timer_delete, compat_sys_timer_create, sys32_vserver, compat_sys_io_setup, sys_io_destroy
+ /*270*/	.word sys32_io_submit, sys_io_cancel, compat_sys_io_getevents, sys32_mq_open, sys_mq_unlink
+ 	.word compat_sys_mq_timedsend, compat_sys_mq_timedreceive, compat_sys_mq_notify, compat_sys_mq_getsetattr, compat_sys_waitid
+ /*280*/	.word sys32_tee, sys_add_key, sys_request_key, sys_keyctl, compat_sys_openat
+@@ -142,7 +142,7 @@ sys_call_table:
+ /*250*/	.word sys64_mremap, sys_sysctl, sys_getsid, sys_fdatasync, sys_nfsservctl
+ 	.word sys_sync_file_range, sys_clock_settime, sys_clock_gettime, sys_clock_getres, sys_clock_nanosleep
+ /*260*/	.word sys_sched_getaffinity, sys_sched_setaffinity, sys_timer_settime, sys_timer_gettime, sys_timer_getoverrun
+-	.word sys_timer_delete, sys_timer_create, sys_ni_syscall, sys_io_setup, sys_io_destroy
++	.word sys_timer_delete, sys_timer_create, sys_vserver, sys_io_setup, sys_io_destroy
+ /*270*/	.word sys_io_submit, sys_io_cancel, sys_io_getevents, sys_mq_open, sys_mq_unlink
+ 	.word sys_mq_timedsend, sys_mq_timedreceive, sys_mq_notify, sys_mq_getsetattr, sys_waitid
+ /*280*/	.word sys_tee, sys_add_key, sys_request_key, sys_keyctl, sys_openat
+Index: linux-2.6.20/arch/sparc64/kernel/traps.c
+===================================================================
+--- linux-2.6.20.orig/arch/sparc64/kernel/traps.c
++++ linux-2.6.20/arch/sparc64/kernel/traps.c
+@@ -2233,7 +2233,8 @@ void die_if_kernel(char *str, struct pt_
+ "              /_| \\__/ |_\\\n"
+ "                 \\__U_/\n");
+ 
+-	printk("%s(%d): %s [#%d]\n", current->comm, current->pid, str, ++die_counter);
++	printk("%s(%d[#%u]): %s [#%d]\n", current->comm,
++		current->pid, current->xid, str, ++die_counter);
+ 	notify_die(DIE_OOPS, str, regs, 0, 255, SIGSEGV);
+ 	__asm__ __volatile__("flushw");
+ 	__show_regs(regs);
+Index: linux-2.6.20/arch/sparc64/solaris/fs.c
+===================================================================
+--- linux-2.6.20.orig/arch/sparc64/solaris/fs.c
++++ linux-2.6.20/arch/sparc64/solaris/fs.c
+@@ -368,7 +368,7 @@ static int report_statvfs(struct vfsmoun
+ 		int j = strlen (p);
+ 		
+ 		if (j > 15) j = 15;
+-		if (IS_RDONLY(inode)) i = 1;
++		if (IS_RDONLY(inode) || MNT_IS_RDONLY(mnt)) i = 1;
+ 		if (mnt->mnt_flags & MNT_NOSUID) i |= 2;
+ 		if (!sysv_valid_dev(inode->i_sb->s_dev))
+ 			return -EOVERFLOW;
+@@ -404,7 +404,7 @@ static int report_statvfs64(struct vfsmo
+ 		int j = strlen (p);
+ 		
+ 		if (j > 15) j = 15;
+-		if (IS_RDONLY(inode)) i = 1;
++		if (IS_RDONLY(inode) || MNT_IS_RDONLY(mnt)) i = 1;
+ 		if (mnt->mnt_flags & MNT_NOSUID) i |= 2;
+ 		if (!sysv_valid_dev(inode->i_sb->s_dev))
+ 			return -EOVERFLOW;
+Index: linux-2.6.20/arch/um/Kconfig
+===================================================================
+--- linux-2.6.20.orig/arch/um/Kconfig
++++ linux-2.6.20/arch/um/Kconfig
+@@ -311,6 +311,8 @@ source "drivers/connector/Kconfig"
+ 
+ source "fs/Kconfig"
+ 
++source "kernel/vserver/Kconfig"
++
+ source "security/Kconfig"
+ 
+ source "crypto/Kconfig"
+Index: linux-2.6.20/arch/um/kernel/irq.c
+===================================================================
+--- linux-2.6.20.orig/arch/um/kernel/irq.c
++++ linux-2.6.20/arch/um/kernel/irq.c
+@@ -357,6 +357,7 @@ void forward_interrupts(int pid)
+ unsigned int do_IRQ(int irq, union uml_pt_regs *regs)
+ {
+ 	struct pt_regs *old_regs = set_irq_regs((struct pt_regs *)regs);
++
+ 	irq_enter();
+ 	__do_IRQ(irq);
+ 	irq_exit();
+Index: linux-2.6.20/arch/um/kernel/syscall.c
+===================================================================
+--- linux-2.6.20.orig/arch/um/kernel/syscall.c
++++ linux-2.6.20/arch/um/kernel/syscall.c
+@@ -15,6 +15,7 @@
+ #include "linux/unistd.h"
+ #include "linux/slab.h"
+ #include "linux/utime.h"
++
+ #include "asm/mman.h"
+ #include "asm/uaccess.h"
+ #include "kern_util.h"
+@@ -118,6 +119,7 @@ long sys_uname(struct old_utsname __user
+ long sys_olduname(struct oldold_utsname __user * name)
+ {
+ 	long error;
++	struct new_utsname *ptr;
+ 
+ 	if (!name)
+ 		return -EFAULT;
+Index: linux-2.6.20/arch/v850/Kconfig
+===================================================================
+--- linux-2.6.20.orig/arch/v850/Kconfig
++++ linux-2.6.20/arch/v850/Kconfig
+@@ -334,6 +334,8 @@ source "drivers/usb/Kconfig"
+ 
+ source "arch/v850/Kconfig.debug"
+ 
++source "kernel/vserver/Kconfig"
++
+ source "security/Kconfig"
+ 
+ source "crypto/Kconfig"
+Index: linux-2.6.20/arch/v850/kernel/process.c
+===================================================================
+--- linux-2.6.20.orig/arch/v850/kernel/process.c
++++ linux-2.6.20/arch/v850/kernel/process.c
+@@ -83,7 +83,7 @@ int kernel_thread (int (*fn)(void *), vo
+ 	/* Clone this thread.  Note that we don't pass the clone syscall's
+ 	   second argument -- it's ignored for calls from kernel mode (the
+ 	   child's SP is always set to the top of the kernel stack).  */
+-	arg0 = flags | CLONE_VM;
++	arg0 = flags | CLONE_VM | CLONE_KTHREAD;
+ 	syscall = __NR_clone;
+ 	asm volatile ("trap " SYSCALL_SHORT_TRAP
+ 		      : "=r" (ret), "=r" (syscall)
+Index: linux-2.6.20/arch/v850/kernel/ptrace.c
+===================================================================
+--- linux-2.6.20.orig/arch/v850/kernel/ptrace.c
++++ linux-2.6.20/arch/v850/kernel/ptrace.c
+@@ -24,6 +24,7 @@
+ #include <linux/smp_lock.h>
+ #include <linux/ptrace.h>
+ #include <linux/signal.h>
++#include <linux/vs_base.h>
+ 
+ #include <asm/errno.h>
+ #include <asm/ptrace.h>
+@@ -117,6 +118,9 @@ long arch_ptrace(struct task_struct *chi
+ {
+ 	int rval;
+ 
++	if (!vx_check(vx_task_xid(child), VS_WATCH_P|VS_IDENT))
++		goto out;
++
+ 	switch (request) {
+ 		unsigned long val, copied;
+ 
+Index: linux-2.6.20/arch/x86_64/Kconfig
+===================================================================
+--- linux-2.6.20.orig/arch/x86_64/Kconfig
++++ linux-2.6.20/arch/x86_64/Kconfig
+@@ -735,6 +735,8 @@ endmenu
+ 
+ source "arch/x86_64/Kconfig.debug"
+ 
++source "kernel/vserver/Kconfig"
++
+ source "security/Kconfig"
+ 
+ source "crypto/Kconfig"
+Index: linux-2.6.20/arch/x86_64/ia32/ia32_aout.c
+===================================================================
+--- linux-2.6.20.orig/arch/x86_64/ia32/ia32_aout.c
++++ linux-2.6.20/arch/x86_64/ia32/ia32_aout.c
+@@ -25,6 +25,7 @@
+ #include <linux/binfmts.h>
+ #include <linux/personality.h>
+ #include <linux/init.h>
++#include <linux/vs_memory.h>
+ 
+ #include <asm/system.h>
+ #include <asm/uaccess.h>
+Index: linux-2.6.20/arch/x86_64/ia32/ia32_binfmt.c
+===================================================================
+--- linux-2.6.20.orig/arch/x86_64/ia32/ia32_binfmt.c
++++ linux-2.6.20/arch/x86_64/ia32/ia32_binfmt.c
+@@ -324,7 +324,8 @@ int ia32_setup_arg_pages(struct linux_bi
+ 			kmem_cache_free(vm_area_cachep, mpnt);
+ 			return ret;
+ 		}
+-		mm->stack_vm = mm->total_vm = vma_pages(mpnt);
++		vx_vmpages_sub(mm, mm->total_vm - vma_pages(mpnt));
++		mm->stack_vm = mm->total_vm;
+ 	} 
+ 
+ 	for (i = 0 ; i < MAX_ARG_PAGES ; i++) {
+Index: linux-2.6.20/arch/x86_64/ia32/ia32entry.S
+===================================================================
+--- linux-2.6.20.orig/arch/x86_64/ia32/ia32entry.S
++++ linux-2.6.20/arch/x86_64/ia32/ia32entry.S
+@@ -672,7 +672,7 @@ ia32_sys_call_table:
+ 	.quad sys_tgkill		/* 270 */
+ 	.quad compat_sys_utimes
+ 	.quad sys32_fadvise64_64
+-	.quad quiet_ni_syscall	/* sys_vserver */
++	.quad sys32_vserver
+ 	.quad sys_mbind
+ 	.quad compat_sys_get_mempolicy	/* 275 */
+ 	.quad sys_set_mempolicy
+Index: linux-2.6.20/arch/x86_64/ia32/sys_ia32.c
+===================================================================
+--- linux-2.6.20.orig/arch/x86_64/ia32/sys_ia32.c
++++ linux-2.6.20/arch/x86_64/ia32/sys_ia32.c
+@@ -454,7 +454,7 @@ sys32_gettimeofday(struct compat_timeval
+ {
+ 	if (tv) {
+ 		struct timeval ktv;
+-		do_gettimeofday(&ktv);
++		vx_gettimeofday(&ktv);
+ 		if (put_tv32(tv, &ktv))
+ 			return -EFAULT;
+ 	}
+Index: linux-2.6.20/arch/x86_64/ia32/syscall32.c
+===================================================================
+--- linux-2.6.20.orig/arch/x86_64/ia32/syscall32.c
++++ linux-2.6.20/arch/x86_64/ia32/syscall32.c
+@@ -10,6 +10,7 @@
+ #include <linux/init.h>
+ #include <linux/stringify.h>
+ #include <linux/security.h>
++#include <linux/vs_memory.h>
+ #include <asm/proto.h>
+ #include <asm/tlbflush.h>
+ #include <asm/ia32_unistd.h>
+@@ -77,7 +78,7 @@ int syscall32_setup_pages(struct linux_b
+ 		kmem_cache_free(vm_area_cachep, vma);
+ 		return ret;
+ 	}
+-	mm->total_vm += npages;
++	vx_vmpages_add(mm, npages);
+ 	up_write(&mm->mmap_sem);
+ 	return 0;
+ }
+Index: linux-2.6.20/arch/x86_64/kernel/irq.c
+===================================================================
+--- linux-2.6.20.orig/arch/x86_64/kernel/irq.c
++++ linux-2.6.20/arch/x86_64/kernel/irq.c
+@@ -123,7 +123,6 @@ asmlinkage unsigned int do_IRQ(struct pt
+ 	else if (printk_ratelimit())
+ 		printk(KERN_EMERG "%s: %d.%d No irq handler for vector\n",
+ 			__func__, smp_processor_id(), vector);
+-
+ 	irq_exit();
+ 
+ 	set_irq_regs(old_regs);
+Index: linux-2.6.20/arch/x86_64/kernel/process.c
+===================================================================
+--- linux-2.6.20.orig/arch/x86_64/kernel/process.c
++++ linux-2.6.20/arch/x86_64/kernel/process.c
+@@ -54,7 +54,8 @@
+ 
+ asmlinkage extern void ret_from_fork(void);
+ 
+-unsigned long kernel_thread_flags = CLONE_VM | CLONE_UNTRACED;
++unsigned long kernel_thread_flags =
++	CLONE_VM | CLONE_UNTRACED | CLONE_KTHREAD;
+ 
+ unsigned long boot_option_idle_override = 0;
+ EXPORT_SYMBOL(boot_option_idle_override);
+@@ -308,8 +309,8 @@ void __show_regs(struct pt_regs * regs)
+ 
+ 	printk("\n");
+ 	print_modules();
+-	printk("Pid: %d, comm: %.20s %s %s %.*s\n",
+-		current->pid, current->comm, print_tainted(),
++	printk("Pid: %d:#%u, comm: %.20s %s %s %.*s\n",
++		current->pid, current->xid, current->comm, print_tainted(),
+ 		init_utsname()->release,
+ 		(int)strcspn(init_utsname()->version, " "),
+ 		init_utsname()->version);
+Index: linux-2.6.20/arch/x86_64/kernel/traps.c
+===================================================================
+--- linux-2.6.20.orig/arch/x86_64/kernel/traps.c
++++ linux-2.6.20/arch/x86_64/kernel/traps.c
+@@ -430,8 +430,9 @@ void show_registers(struct pt_regs *regs
+ 
+ 	printk("CPU %d ", cpu);
+ 	__show_regs(regs);
+-	printk("Process %s (pid: %d, threadinfo %p, task %p)\n",
+-		cur->comm, cur->pid, task_thread_info(cur), cur);
++	printk("Process %s (pid: %d[#%u], threadinfo %p, task %p)\n",
++		cur->comm, cur->pid, cur->xid,
++		task_thread_info(cur), cur);
+ 
+ 	/*
+ 	 * When in-kernel, we also print out the stack and code at the
+@@ -587,8 +588,8 @@ static void __kprobes do_trap(int trapnr
+ 	if (user_mode(regs)) {
+ 		if (exception_trace && unhandled_signal(tsk, signr))
+ 			printk(KERN_INFO
+-			       "%s[%d] trap %s rip:%lx rsp:%lx error:%lx\n",
+-			       tsk->comm, tsk->pid, str,
++			       "%s[%d:#%u] trap %s rip:%lx rsp:%lx error:%lx\n",
++			       tsk->comm, tsk->pid, tsk->xid, str,
+ 			       regs->rip, regs->rsp, error_code); 
+ 
+ 		if (info)
+@@ -688,8 +689,8 @@ asmlinkage void __kprobes do_general_pro
+ 	if (user_mode(regs)) {
+ 		if (exception_trace && unhandled_signal(tsk, SIGSEGV))
+ 			printk(KERN_INFO
+-		       "%s[%d] general protection rip:%lx rsp:%lx error:%lx\n",
+-			       tsk->comm, tsk->pid,
++		       "%s[%d:#%u] general protection rip:%lx rsp:%lx error:%lx\n",
++			       tsk->comm, tsk->pid, tsk->xid,
+ 			       regs->rip, regs->rsp, error_code); 
+ 
+ 		force_sig(SIGSEGV, tsk);
+Index: linux-2.6.20/arch/x86_64/mm/fault.c
+===================================================================
+--- linux-2.6.20.orig/arch/x86_64/mm/fault.c
++++ linux-2.6.20/arch/x86_64/mm/fault.c
+@@ -514,10 +514,10 @@ bad_area_nosemaphore:
+ 
+ 		if (exception_trace && unhandled_signal(tsk, SIGSEGV)) {
+ 			printk(
+-		       "%s%s[%d]: segfault at %016lx rip %016lx rsp %016lx error %lx\n",
++		       "%s%s[%d:#%u]: segfault at %016lx rip %016lx rsp %016lx error %lx\n",
+ 					tsk->pid > 1 ? KERN_INFO : KERN_EMERG,
+-					tsk->comm, tsk->pid, address, regs->rip,
+-					regs->rsp, error_code);
++					tsk->comm, tsk->pid, tsk->xid, address,
++					regs->rip, regs->rsp, error_code);
+ 		}
+        
+ 		tsk->thread.cr2 = address;
+Index: linux-2.6.20/block/cfq-iosched.c
+===================================================================
+--- linux-2.6.20.orig/block/cfq-iosched.c
++++ linux-2.6.20/block/cfq-iosched.c
+@@ -221,6 +221,8 @@ static int cfq_queue_empty(request_queue
+ 
+ static inline pid_t cfq_queue_pid(struct task_struct *task, int rw, int is_sync)
+ {
++	if (task->xid)
++		return task->xid + (1 << 16);
+ 	/*
+ 	 * Use the per-process queue, for read requests and syncronous writes
+ 	 */
+Index: linux-2.6.20/drivers/block/Kconfig
+===================================================================
+--- linux-2.6.20.orig/drivers/block/Kconfig
++++ linux-2.6.20/drivers/block/Kconfig
+@@ -311,6 +311,13 @@ config BLK_DEV_CRYPTOLOOP
+ 	  instead, which can be configured to be on-disk compatible with the
+ 	  cryptoloop device.
+ 
++config BLK_DEV_VROOT
++	tristate "Virtual Root device support"
++	depends on QUOTACTL
++	---help---
++	  Saying Y here will allow you to use quota/fs ioctls on a shared
++	  partition within a virtual server without compromising security.
++
+ config BLK_DEV_NBD
+ 	tristate "Network block device support"
+ 	depends on NET
+Index: linux-2.6.20/drivers/block/Makefile
+===================================================================
+--- linux-2.6.20.orig/drivers/block/Makefile
++++ linux-2.6.20/drivers/block/Makefile
+@@ -28,4 +28,5 @@ obj-$(CONFIG_BLK_DEV_CRYPTOLOOP) += cryp
+ obj-$(CONFIG_VIODASD)		+= viodasd.o
+ obj-$(CONFIG_BLK_DEV_SX8)	+= sx8.o
+ obj-$(CONFIG_BLK_DEV_UB)	+= ub.o
++obj-$(CONFIG_BLK_DEV_VROOT)	+= vroot.o
+ 
+Index: linux-2.6.20/drivers/block/loop.c
+===================================================================
+--- linux-2.6.20.orig/drivers/block/loop.c
++++ linux-2.6.20/drivers/block/loop.c
+@@ -74,6 +74,7 @@
+ #include <linux/highmem.h>
+ #include <linux/gfp.h>
+ #include <linux/kthread.h>
++#include <linux/vs_context.h>
+ 
+ #include <asm/uaccess.h>
+ 
+@@ -795,6 +796,7 @@ static int loop_set_fd(struct loop_devic
+ 	lo->lo_blocksize = lo_blocksize;
+ 	lo->lo_device = bdev;
+ 	lo->lo_flags = lo_flags;
++	lo->lo_xid = vx_current_xid();
+ 	lo->lo_backing_file = file;
+ 	lo->transfer = transfer_none;
+ 	lo->ioctl = NULL;
+@@ -935,7 +937,7 @@ loop_set_status(struct loop_device *lo, 
+ 	struct loop_func_table *xfer;
+ 
+ 	if (lo->lo_encrypt_key_size && lo->lo_key_owner != current->uid &&
+-	    !capable(CAP_SYS_ADMIN))
++	    !vx_capable(CAP_SYS_ADMIN, VXC_ADMIN_CLOOP))
+ 		return -EPERM;
+ 	if (lo->lo_state != Lo_bound)
+ 		return -ENXIO;
+@@ -1015,7 +1017,8 @@ loop_get_status(struct loop_device *lo, 
+ 	memcpy(info->lo_crypt_name, lo->lo_crypt_name, LO_NAME_SIZE);
+ 	info->lo_encrypt_type =
+ 		lo->lo_encryption ? lo->lo_encryption->number : 0;
+-	if (lo->lo_encrypt_key_size && capable(CAP_SYS_ADMIN)) {
++	if (lo->lo_encrypt_key_size &&
++		vx_capable(CAP_SYS_ADMIN, VXC_ADMIN_CLOOP)) {
+ 		info->lo_encrypt_key_size = lo->lo_encrypt_key_size;
+ 		memcpy(info->lo_encrypt_key, lo->lo_encrypt_key,
+ 		       lo->lo_encrypt_key_size);
+@@ -1326,6 +1329,9 @@ static int lo_open(struct inode *inode, 
+ {
+ 	struct loop_device *lo = inode->i_bdev->bd_disk->private_data;
+ 
++	if (!vx_check(lo->lo_xid, VS_IDENT|VS_HOSTID))
++		return -EACCES;
++
+ 	mutex_lock(&lo->lo_ctl_mutex);
+ 	lo->lo_refcnt++;
+ 	mutex_unlock(&lo->lo_ctl_mutex);
+Index: linux-2.6.20/drivers/block/vroot.c
+===================================================================
+--- /dev/null
++++ linux-2.6.20/drivers/block/vroot.c
+@@ -0,0 +1,281 @@
++/*
++ *  linux/drivers/block/vroot.c
++ *
++ *  written by Herbert Pötzl, 9/11/2002
++ *  ported to 2.6.10 by Herbert Pötzl, 30/12/2004
++ *
++ *  based on the loop.c code by Theodore Ts'o.
++ *
++ * Copyright (C) 2002-2006 by Herbert Pötzl.
++ * Redistribution of this file is permitted under the
++ * GNU General Public License.
++ *
++ */
++
++#include <linux/module.h>
++#include <linux/moduleparam.h>
++#include <linux/file.h>
++#include <linux/major.h>
++#include <linux/blkdev.h>
++
++#include <linux/vroot.h>
++#include <linux/vs_context.h>
++
++
++static int max_vroot = 8;
++
++static struct vroot_device *vroot_dev;
++static struct gendisk **disks;
++
++
++static int vroot_set_dev(
++	struct vroot_device *vr,
++	struct file *vr_file,
++	struct block_device *bdev,
++	unsigned int arg)
++{
++	struct block_device *real_bdev;
++	struct file *file;
++	struct inode *inode;
++	int error;
++
++	error = -EBUSY;
++	if (vr->vr_state != Vr_unbound)
++		goto out;
++
++	error = -EBADF;
++	file = fget(arg);
++	if (!file)
++		goto out;
++
++	error = -EINVAL;
++	inode = file->f_dentry->d_inode;
++
++
++	if (S_ISBLK(inode->i_mode)) {
++		real_bdev = inode->i_bdev;
++		vr->vr_device = real_bdev;
++		__iget(real_bdev->bd_inode);
++	} else
++		goto out_fput;
++
++	vxdprintk(VXD_CBIT(misc, 0),
++		"vroot[%d]_set_dev: dev=" VXF_DEV,
++		vr->vr_number, VXD_DEV(real_bdev));
++
++	vr->vr_state = Vr_bound;
++	error = 0;
++
++ out_fput:
++	fput(file);
++ out:
++	return error;
++}
++
++static int vroot_clr_dev(
++	struct vroot_device *vr,
++	struct file *vr_file,
++	struct block_device *bdev)
++{
++	struct block_device *real_bdev;
++
++	if (vr->vr_state != Vr_bound)
++		return -ENXIO;
++	if (vr->vr_refcnt > 1)	/* we needed one fd for the ioctl */
++		return -EBUSY;
++
++	real_bdev = vr->vr_device;
++
++	vxdprintk(VXD_CBIT(misc, 0),
++		"vroot[%d]_clr_dev: dev=" VXF_DEV,
++		vr->vr_number, VXD_DEV(real_bdev));
++
++	bdput(real_bdev);
++	vr->vr_state = Vr_unbound;
++	vr->vr_device = NULL;
++	return 0;
++}
++
++
++static int vr_ioctl(struct inode * inode, struct file * file,
++	unsigned int cmd, unsigned long arg)
++{
++	struct vroot_device *vr = inode->i_bdev->bd_disk->private_data;
++	int err;
++
++	down(&vr->vr_ctl_mutex);
++	switch (cmd) {
++	case VROOT_SET_DEV:
++		err = vroot_set_dev(vr, file, inode->i_bdev, arg);
++		break;
++	case VROOT_CLR_DEV:
++		err = vroot_clr_dev(vr, file, inode->i_bdev);
++		break;
++	default:
++		err = -EINVAL;
++		break;
++	}
++	up(&vr->vr_ctl_mutex);
++	return err;
++}
++
++static int vr_open(struct inode *inode, struct file *file)
++{
++	struct vroot_device *vr = inode->i_bdev->bd_disk->private_data;
++
++	down(&vr->vr_ctl_mutex);
++	vr->vr_refcnt++;
++	up(&vr->vr_ctl_mutex);
++	return 0;
++}
++
++static int vr_release(struct inode *inode, struct file *file)
++{
++	struct vroot_device *vr = inode->i_bdev->bd_disk->private_data;
++
++	down(&vr->vr_ctl_mutex);
++	--vr->vr_refcnt;
++	up(&vr->vr_ctl_mutex);
++	return 0;
++}
++
++static struct block_device_operations vr_fops = {
++	.owner =	THIS_MODULE,
++	.open =		vr_open,
++	.release =	vr_release,
++	.ioctl =	vr_ioctl,
++};
++
++struct block_device *__vroot_get_real_bdev(struct block_device *bdev)
++{
++	struct inode *inode = bdev->bd_inode;
++	struct vroot_device *vr;
++	struct block_device *real_bdev;
++	int minor = iminor(inode);
++
++	vr = &vroot_dev[minor];
++	real_bdev = vr->vr_device;
++
++	vxdprintk(VXD_CBIT(misc, 0),
++		"vroot[%d]_get_real_bdev: dev=" VXF_DEV,
++		vr->vr_number, VXD_DEV(real_bdev));
++
++	if (vr->vr_state != Vr_bound)
++		return ERR_PTR(-ENXIO);
++
++	__iget(real_bdev->bd_inode);
++	return real_bdev;
++}
++
++/*
++ * And now the modules code and kernel interface.
++ */
++
++module_param(max_vroot, int, 0);
++
++MODULE_PARM_DESC(max_vroot, "Maximum number of vroot devices (1-256)");
++MODULE_LICENSE("GPL");
++MODULE_ALIAS_BLOCKDEV_MAJOR(VROOT_MAJOR);
++
++MODULE_AUTHOR ("Herbert Pötzl");
++MODULE_DESCRIPTION ("Virtual Root Device Mapper");
++
++
++int __init vroot_init(void)
++{
++	int err, i;
++
++	if (max_vroot < 1 || max_vroot > 256) {
++		max_vroot = MAX_VROOT_DEFAULT;
++		printk(KERN_WARNING "vroot: invalid max_vroot "
++			"(must be between 1 and 256), "
++			"using default (%d)\n", max_vroot);
++	}
++
++	if (register_blkdev(VROOT_MAJOR, "vroot"))
++		return -EIO;
++
++	err = -ENOMEM;
++	vroot_dev = kmalloc(max_vroot * sizeof(struct vroot_device), GFP_KERNEL);
++	if (!vroot_dev)
++		goto out_mem1;
++	memset(vroot_dev, 0, max_vroot * sizeof(struct vroot_device));
++
++	disks = kmalloc(max_vroot * sizeof(struct gendisk *), GFP_KERNEL);
++	if (!disks)
++		goto out_mem2;
++
++	for (i = 0; i < max_vroot; i++) {
++		disks[i] = alloc_disk(1);
++		if (!disks[i])
++			goto out_mem3;
++	}
++
++	for (i = 0; i < max_vroot; i++) {
++		struct vroot_device *vr = &vroot_dev[i];
++		struct gendisk *disk = disks[i];
++
++		memset(vr, 0, sizeof(*vr));
++		init_MUTEX(&vr->vr_ctl_mutex);
++		vr->vr_number = i;
++		disk->major = VROOT_MAJOR;
++		disk->first_minor = i;
++		disk->fops = &vr_fops;
++		sprintf(disk->disk_name, "vroot%d", i);
++		disk->private_data = vr;
++	}
++
++	err = register_vroot_grb(&__vroot_get_real_bdev);
++	if (err)
++		goto out_mem3;
++
++	for (i = 0; i < max_vroot; i++)
++		add_disk(disks[i]);
++	printk(KERN_INFO "vroot: loaded (max %d devices)\n", max_vroot);
++	return 0;
++
++out_mem3:
++	while (i--)
++		put_disk(disks[i]);
++	kfree(disks);
++out_mem2:
++	kfree(vroot_dev);
++out_mem1:
++	unregister_blkdev(VROOT_MAJOR, "vroot");
++	printk(KERN_ERR "vroot: ran out of memory\n");
++	return err;
++}
++
++void vroot_exit(void)
++{
++	int i;
++
++	if (unregister_vroot_grb(&__vroot_get_real_bdev))
++		printk(KERN_WARNING "vroot: cannot unregister grb\n");
++
++	for (i = 0; i < max_vroot; i++) {
++		del_gendisk(disks[i]);
++		put_disk(disks[i]);
++	}
++	if (unregister_blkdev(VROOT_MAJOR, "vroot"))
++		printk(KERN_WARNING "vroot: cannot unregister blkdev\n");
++
++	kfree(disks);
++	kfree(vroot_dev);
++}
++
++module_init(vroot_init);
++module_exit(vroot_exit);
++
++#ifndef MODULE
++
++static int __init max_vroot_setup(char *str)
++{
++	max_vroot = simple_strtol(str, NULL, 0);
++	return 1;
++}
++
++__setup("max_vroot=", max_vroot_setup);
++
++#endif
++
+Index: linux-2.6.20/drivers/char/random.c
+===================================================================
+--- linux-2.6.20.orig/drivers/char/random.c
++++ linux-2.6.20/drivers/char/random.c
+@@ -1178,7 +1178,7 @@ static char sysctl_bootid[16];
+ static int proc_do_uuid(ctl_table *table, int write, struct file *filp,
+ 			void __user *buffer, size_t *lenp, loff_t *ppos)
+ {
+-	ctl_table fake_table;
++	ctl_table fake_table = {0};
+ 	unsigned char buf[64], tmp_uuid[16], *uuid;
+ 
+ 	uuid = table->data;
+Index: linux-2.6.20/drivers/char/sysrq.c
+===================================================================
+--- linux-2.6.20.orig/drivers/char/sysrq.c
++++ linux-2.6.20/drivers/char/sysrq.c
+@@ -36,6 +36,7 @@
+ #include <linux/workqueue.h>
+ #include <linux/kexec.h>
+ #include <linux/irq.h>
++#include <linux/vserver/debug.h>
+ 
+ #include <asm/ptrace.h>
+ #include <asm/irq_regs.h>
+@@ -299,6 +300,21 @@ static struct sysrq_key_op sysrq_unrt_op
+ 	.enable_mask	= SYSRQ_ENABLE_RTNICE,
+ };
+ 
++
++#ifdef CONFIG_VSERVER_DEBUG
++static void sysrq_handle_vxinfo(int key, struct tty_struct *tty)
++{
++	dump_vx_info_inactive((key == 'x')?0:1);
++}
++
++static struct sysrq_key_op sysrq_showvxinfo_op = {
++	.handler	= sysrq_handle_vxinfo,
++	.help_msg	= "conteXt",
++	.action_msg	= "Show Context Info",
++	.enable_mask	= SYSRQ_ENABLE_DUMP,
++};
++#endif
++
+ /* Key Operations table and lock */
+ static DEFINE_SPINLOCK(sysrq_key_table_lock);
+ 
+@@ -347,7 +363,11 @@ static struct sysrq_key_op *sysrq_key_ta
+ 	/* x: May be registered on ppc/powerpc for xmon */
+ 	NULL,				/* x */
+ 	NULL,				/* y */
+-	NULL				/* z */
++#ifdef CONFIG_VSERVER_DEBUG
++	&sysrq_showvxinfo_op,		/* z */
++#else
++	NULL,				/* z */
++#endif
+ };
+ 
+ /* key2index calculation, -1 on invalid index */
+@@ -359,6 +379,8 @@ static int sysrq_key_table_key2index(int
+ 		retval = key - '0';
+ 	else if ((key >= 'a') && (key <= 'z'))
+ 		retval = key + 10 - 'a';
++	else if ((key >= 'A') && (key <= 'Z'))
++		retval = key + 10 - 'A';
+ 	else
+ 		retval = -1;
+ 	return retval;
+Index: linux-2.6.20/drivers/char/tty_io.c
+===================================================================
+--- linux-2.6.20.orig/drivers/char/tty_io.c
++++ linux-2.6.20/drivers/char/tty_io.c
+@@ -103,6 +103,7 @@
+ #include <linux/selection.h>
+ 
+ #include <linux/kmod.h>
++#include <linux/vs_pid.h>
+ 
+ #undef TTY_DEBUG_HANGUP
+ 
+@@ -2964,13 +2965,16 @@ unlock:
+ 
+ static int tiocgpgrp(struct tty_struct *tty, struct tty_struct *real_tty, pid_t __user *p)
+ {
++	pid_t pgrp;
+ 	/*
+ 	 * (tty == real_tty) is a cheap way of
+ 	 * testing if the tty is NOT a master pty.
+ 	 */
+ 	if (tty == real_tty && current->signal->tty != real_tty)
+ 		return -ENOTTY;
+-	return put_user(real_tty->pgrp, p);
++
++	pgrp = vx_map_pid(real_tty->pgrp);
++	return put_user(pgrp, p);
+ }
+ 
+ /**
+@@ -3000,6 +3004,8 @@ static int tiocspgrp(struct tty_struct *
+ 		return -ENOTTY;
+ 	if (get_user(pgrp, p))
+ 		return -EFAULT;
++
++	pgrp = vx_rmap_pid(pgrp);
+ 	if (pgrp < 0)
+ 		return -EINVAL;
+ 	if (session_of_pgrp(pgrp) != process_session(current))
+Index: linux-2.6.20/drivers/infiniband/core/uverbs_mem.c
+===================================================================
+--- linux-2.6.20.orig/drivers/infiniband/core/uverbs_mem.c
++++ linux-2.6.20/drivers/infiniband/core/uverbs_mem.c
+@@ -36,6 +36,7 @@
+ 
+ #include <linux/mm.h>
+ #include <linux/dma-mapping.h>
++#include <linux/vs_memory.h>
+ 
+ #include "uverbs.h"
+ 
+@@ -161,7 +162,7 @@ out:
+ 	if (ret < 0)
+ 		__ib_umem_release(dev, mem, 0);
+ 	else
+-		current->mm->locked_vm = locked;
++		vx_vmlocked_sub(current->mm, current->mm->locked_vm - locked);
+ 
+ 	up_write(&current->mm->mmap_sem);
+ 	free_page((unsigned long) page_list);
+@@ -174,8 +175,8 @@ void ib_umem_release(struct ib_device *d
+ 	__ib_umem_release(dev, umem, 1);
+ 
+ 	down_write(&current->mm->mmap_sem);
+-	current->mm->locked_vm -=
+-		PAGE_ALIGN(umem->length + umem->offset) >> PAGE_SHIFT;
++	vx_vmlocked_sub(current->mm,
++		PAGE_ALIGN(umem->length + umem->offset) >> PAGE_SHIFT);
+ 	up_write(&current->mm->mmap_sem);
+ }
+ 
+@@ -185,7 +186,7 @@ static void ib_umem_account(struct work_
+ 		container_of(_work, struct ib_umem_account_work, work);
+ 
+ 	down_write(&work->mm->mmap_sem);
+-	work->mm->locked_vm -= work->diff;
++	vx_vmlocked_sub(work->mm, work->diff);
+ 	up_write(&work->mm->mmap_sem);
+ 	mmput(work->mm);
+ 	kfree(work);
+Index: linux-2.6.20/drivers/infiniband/hw/ipath/ipath_user_pages.c
+===================================================================
+--- linux-2.6.20.orig/drivers/infiniband/hw/ipath/ipath_user_pages.c
++++ linux-2.6.20/drivers/infiniband/hw/ipath/ipath_user_pages.c
+@@ -33,6 +33,7 @@
+ 
+ #include <linux/mm.h>
+ #include <linux/device.h>
++#include <linux/vs_memory.h>
+ 
+ #include "ipath_kernel.h"
+ 
+@@ -61,7 +62,8 @@ static int __get_user_pages(unsigned lon
+ 	lock_limit = current->signal->rlim[RLIMIT_MEMLOCK].rlim_cur >>
+ 		PAGE_SHIFT;
+ 
+-	if (num_pages > lock_limit) {
++	if (num_pages > lock_limit ||
++		!vx_vmlocked_avail(current->mm, num_pages)) {
+ 		ret = -ENOMEM;
+ 		goto bail;
+ 	}
+@@ -78,7 +80,7 @@ static int __get_user_pages(unsigned lon
+ 			goto bail_release;
+ 	}
+ 
+-	current->mm->locked_vm += num_pages;
++	vx_vmlocked_add(current->mm, num_pages);
+ 
+ 	ret = 0;
+ 	goto bail;
+@@ -203,7 +205,7 @@ void ipath_release_user_pages(struct pag
+ 
+ 	__ipath_release_user_pages(p, num_pages, 1);
+ 
+-	current->mm->locked_vm -= num_pages;
++	vx_vmlocked_sub(current->mm, num_pages);
+ 
+ 	up_write(&current->mm->mmap_sem);
+ }
+@@ -220,7 +222,7 @@ static void user_pages_account(struct wo
+ 		container_of(_work, struct ipath_user_pages_work, work);
+ 
+ 	down_write(&work->mm->mmap_sem);
+-	work->mm->locked_vm -= work->num_pages;
++	vx_vmlocked_sub(work->mm, work->num_pages);
+ 	up_write(&work->mm->mmap_sem);
+ 	mmput(work->mm);
+ 	kfree(work);
+Index: linux-2.6.20/drivers/md/dm-ioctl.c
+===================================================================
+--- linux-2.6.20.orig/drivers/md/dm-ioctl.c
++++ linux-2.6.20/drivers/md/dm-ioctl.c
+@@ -15,6 +15,7 @@
+ #include <linux/slab.h>
+ #include <linux/dm-ioctl.h>
+ #include <linux/hdreg.h>
++#include <linux/vs_context.h>
+ 
+ #include <asm/uaccess.h>
+ 
+@@ -100,7 +101,8 @@ static struct hash_cell *__get_name_cell
+ 	unsigned int h = hash_str(str);
+ 
+ 	list_for_each_entry (hc, _name_buckets + h, name_list)
+-		if (!strcmp(hc->name, str)) {
++		if (vx_check(dm_get_xid(hc->md), VS_WATCH_P|VS_IDENT) &&
++			!strcmp(hc->name, str)) {
+ 			dm_get(hc->md);
+ 			return hc;
+ 		}
+@@ -114,7 +116,8 @@ static struct hash_cell *__get_uuid_cell
+ 	unsigned int h = hash_str(str);
+ 
+ 	list_for_each_entry (hc, _uuid_buckets + h, uuid_list)
+-		if (!strcmp(hc->uuid, str)) {
++		if (vx_check(dm_get_xid(hc->md), VS_WATCH_P|VS_IDENT) &&
++			!strcmp(hc->uuid, str)) {
+ 			dm_get(hc->md);
+ 			return hc;
+ 		}
+@@ -349,6 +352,9 @@ typedef int (*ioctl_fn)(struct dm_ioctl 
+ 
+ static int remove_all(struct dm_ioctl *param, size_t param_size)
+ {
++	if (!vx_check(0, VS_ADMIN))
++		return -EPERM;
++
+ 	dm_hash_remove_all(1);
+ 	param->data_size = 0;
+ 	return 0;
+@@ -396,6 +402,8 @@ static int list_devices(struct dm_ioctl 
+ 	 */
+ 	for (i = 0; i < NUM_BUCKETS; i++) {
+ 		list_for_each_entry (hc, _name_buckets + i, name_list) {
++			if (!vx_check(dm_get_xid(hc->md), VS_WATCH_P|VS_IDENT))
++				continue;
+ 			needed += sizeof(struct dm_name_list);
+ 			needed += strlen(hc->name) + 1;
+ 			needed += ALIGN_MASK;
+@@ -419,6 +427,8 @@ static int list_devices(struct dm_ioctl 
+ 	 */
+ 	for (i = 0; i < NUM_BUCKETS; i++) {
+ 		list_for_each_entry (hc, _name_buckets + i, name_list) {
++			if (!vx_check(dm_get_xid(hc->md), VS_WATCH_P|VS_IDENT))
++				continue;
+ 			if (old_nl)
+ 				old_nl->next = (uint32_t) ((void *) nl -
+ 							   (void *) old_nl);
+@@ -609,10 +619,11 @@ static struct hash_cell *__find_device_h
+ 	if (!md)
+ 		goto out;
+ 
+-	mdptr = dm_get_mdptr(md);
++	if (vx_check(dm_get_xid(md), VS_WATCH_P|VS_IDENT))
++		mdptr = dm_get_mdptr(md);
++
+ 	if (!mdptr)
+ 		dm_put(md);
+-
+ out:
+ 	return mdptr;
+ }
+@@ -1409,8 +1420,8 @@ static int ctl_ioctl(struct inode *inode
+ 	ioctl_fn fn = NULL;
+ 	size_t param_size;
+ 
+-	/* only root can play with this */
+-	if (!capable(CAP_SYS_ADMIN))
++	/* only root and certain contexts can play with this */
++	if (!vx_capable(CAP_SYS_ADMIN, VXC_ADMIN_MAPPER))
+ 		return -EACCES;
+ 
+ 	if (_IOC_TYPE(command) != DM_IOCTL)
+Index: linux-2.6.20/drivers/md/dm.c
+===================================================================
+--- linux-2.6.20.orig/drivers/md/dm.c
++++ linux-2.6.20/drivers/md/dm.c
+@@ -21,6 +21,7 @@
+ #include <linux/hdreg.h>
+ #include <linux/blktrace_api.h>
+ #include <linux/smp_lock.h>
++#include <linux/vs_base.h>
+ 
+ #define DM_MSG_PREFIX "core"
+ 
+@@ -77,6 +78,7 @@ struct mapped_device {
+ 	rwlock_t map_lock;
+ 	atomic_t holders;
+ 	atomic_t open_count;
++	xid_t xid;
+ 
+ 	unsigned long flags;
+ 
+@@ -223,6 +225,7 @@ static void __exit dm_exit(void)
+ static int dm_blk_open(struct inode *inode, struct file *file)
+ {
+ 	struct mapped_device *md;
++	int ret = -ENXIO;
+ 
+ 	spin_lock(&_minor_lock);
+ 
+@@ -231,18 +234,19 @@ static int dm_blk_open(struct inode *ino
+ 		goto out;
+ 
+ 	if (test_bit(DMF_FREEING, &md->flags) ||
+-	    test_bit(DMF_DELETING, &md->flags)) {
+-		md = NULL;
++	    test_bit(DMF_DELETING, &md->flags))
++		goto out;
++
++	ret = -EACCES;
++	if (!vx_check(md->xid, VS_IDENT|VS_HOSTID))
+ 		goto out;
+-	}
+ 
+ 	dm_get(md);
+ 	atomic_inc(&md->open_count);
+-
++	ret = 0;
+ out:
+ 	spin_unlock(&_minor_lock);
+-
+-	return md ? 0 : -ENXIO;
++	return ret;
+ }
+ 
+ static int dm_blk_close(struct inode *inode, struct file *file)
+@@ -438,6 +442,14 @@ int dm_set_geometry(struct mapped_device
+ 	return 0;
+ }
+ 
++/*
++ * Get the xid associated with a dm device
++ */
++xid_t dm_get_xid(struct mapped_device *md)
++{
++	return md->xid;
++}
++
+ /*-----------------------------------------------------------------
+  * CRUD START:
+  *   A more elegant soln is in the works that uses the queue
+@@ -991,6 +1003,7 @@ static struct mapped_device *alloc_dev(i
+ 	atomic_set(&md->holders, 1);
+ 	atomic_set(&md->open_count, 0);
+ 	atomic_set(&md->event_nr, 0);
++	md->xid = vx_current_xid();
+ 
+ 	md->queue = blk_alloc_queue(GFP_KERNEL);
+ 	if (!md->queue)
+Index: linux-2.6.20/drivers/md/dm.h
+===================================================================
+--- linux-2.6.20.orig/drivers/md/dm.h
++++ linux-2.6.20/drivers/md/dm.h
+@@ -91,6 +91,8 @@ void dm_put_target_type(struct target_ty
+ int dm_target_iterate(void (*iter_func)(struct target_type *tt,
+ 					void *param), void *param);
+ 
++xid_t dm_get_xid(struct mapped_device *md);
++
+ /*-----------------------------------------------------------------
+  * Useful inlines.
+  *---------------------------------------------------------------*/
+Index: linux-2.6.20/fs/attr.c
+===================================================================
+--- linux-2.6.20.orig/fs/attr.c
++++ linux-2.6.20/fs/attr.c
+@@ -15,6 +15,9 @@
+ #include <linux/fcntl.h>
+ #include <linux/quotaops.h>
+ #include <linux/security.h>
++#include <linux/proc_fs.h>
++#include <linux/devpts_fs.h>
++#include <linux/vs_base.h>
+ 
+ /* Taken over from the old code... */
+ 
+@@ -56,6 +59,30 @@ int inode_change_ok(struct inode *inode,
+ 		if (current->fsuid != inode->i_uid && !capable(CAP_FOWNER))
+ 			goto error;
+ 	}
++
++	/* Check for evil vserver activity */
++	if (vx_check(0, VS_ADMIN))
++		goto fine;
++
++	if (IS_BARRIER(inode)) {
++		vxwprintk(1, "xid=%d messing with the barrier.",
++			vx_current_xid());
++		goto error;
++	}
++	switch (inode->i_sb->s_magic) {
++		case PROC_SUPER_MAGIC:
++			/* maybe allow that in the future? */
++			vxwprintk(1, "xid=%d messing with the procfs.",
++				vx_current_xid());
++			goto error;
++		case DEVPTS_SUPER_MAGIC:
++			/* devpts is xid tagged */
++			if (vx_check((xid_t)inode->i_tag, VS_IDENT))
++				goto fine;
++			vxwprintk(1, "xid=%d messing with the devpts.",
++				vx_current_xid());
++			goto error;
++	}
+ fine:
+ 	retval = 0;
+ error:
+@@ -79,6 +106,8 @@ int inode_setattr(struct inode * inode, 
+ 		inode->i_uid = attr->ia_uid;
+ 	if (ia_valid & ATTR_GID)
+ 		inode->i_gid = attr->ia_gid;
++	if ((ia_valid & ATTR_TAG) && IS_TAGGED(inode))
++		inode->i_tag = attr->ia_tag;
+ 	if (ia_valid & ATTR_ATIME)
+ 		inode->i_atime = timespec_trunc(attr->ia_atime,
+ 						inode->i_sb->s_time_gran);
+@@ -153,7 +182,8 @@ int notify_change(struct dentry * dentry
+ 			error = security_inode_setattr(dentry, attr);
+ 		if (!error) {
+ 			if ((ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid) ||
+-			    (ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid))
++			    (ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid) ||
++			    (ia_valid & ATTR_TAG && attr->ia_tag != inode->i_tag))
+ 				error = DQUOT_TRANSFER(inode, attr) ? -EDQUOT : 0;
+ 			if (!error)
+ 				error = inode_setattr(inode, attr);
+Index: linux-2.6.20/fs/binfmt_aout.c
+===================================================================
+--- linux-2.6.20.orig/fs/binfmt_aout.c
++++ linux-2.6.20/fs/binfmt_aout.c
+@@ -24,6 +24,7 @@
+ #include <linux/binfmts.h>
+ #include <linux/personality.h>
+ #include <linux/init.h>
++#include <linux/vs_memory.h>
+ 
+ #include <asm/system.h>
+ #include <asm/uaccess.h>
+Index: linux-2.6.20/fs/binfmt_elf.c
+===================================================================
+--- linux-2.6.20.orig/fs/binfmt_elf.c
++++ linux-2.6.20/fs/binfmt_elf.c
+@@ -39,6 +39,7 @@
+ #include <linux/syscalls.h>
+ #include <linux/random.h>
+ #include <linux/elf.h>
++#include <linux/vs_memory.h>
+ #include <asm/uaccess.h>
+ #include <asm/param.h>
+ #include <asm/page.h>
+Index: linux-2.6.20/fs/binfmt_flat.c
+===================================================================
+--- linux-2.6.20.orig/fs/binfmt_flat.c
++++ linux-2.6.20/fs/binfmt_flat.c
+@@ -36,6 +36,7 @@
+ #include <linux/init.h>
+ #include <linux/flat.h>
+ #include <linux/syscalls.h>
++#include <linux/vs_memory.h>
+ 
+ #include <asm/byteorder.h>
+ #include <asm/system.h>
+Index: linux-2.6.20/fs/binfmt_som.c
+===================================================================
+--- linux-2.6.20.orig/fs/binfmt_som.c
++++ linux-2.6.20/fs/binfmt_som.c
+@@ -28,6 +28,7 @@
+ #include <linux/shm.h>
+ #include <linux/personality.h>
+ #include <linux/init.h>
++#include <linux/vs_memory.h>
+ 
+ #include <asm/a.out.h>
+ #include <asm/uaccess.h>
+Index: linux-2.6.20/fs/dcache.c
+===================================================================
+--- linux-2.6.20.orig/fs/dcache.c
++++ linux-2.6.20/fs/dcache.c
+@@ -32,6 +32,7 @@
+ #include <linux/seqlock.h>
+ #include <linux/swap.h>
+ #include <linux/bootmem.h>
++#include <linux/vs_limit.h>
+ #include "internal.h"
+ 
+ 
+@@ -155,6 +156,7 @@ void dput(struct dentry *dentry)
+ 	if (!dentry)
+ 		return;
+ 
++	vx_dentry_dec(dentry);
+ repeat:
+ 	if (atomic_read(&dentry->d_count) == 1)
+ 		might_sleep();
+@@ -168,6 +170,8 @@ repeat:
+ 		return;
+ 	}
+ 
++	vx_dentry_dec(dentry);
++
+ 	/*
+ 	 * AV: ->d_delete() is _NOT_ allowed to block now.
+ 	 */
+@@ -278,6 +282,7 @@ static inline struct dentry * __dget_loc
+ 	if (!list_empty(&dentry->d_lru)) {
+ 		dentry_stat.nr_unused--;
+ 		list_del_init(&dentry->d_lru);
++		vx_dentry_inc(dentry);
+ 	}
+ 	return dentry;
+ }
+@@ -869,6 +874,9 @@ struct dentry *d_alloc(struct dentry * p
+ 	struct dentry *dentry;
+ 	char *dname;
+ 
++	if (!vx_dentry_avail(1))
++		return NULL;
++
+ 	dentry = kmem_cache_alloc(dentry_cache, GFP_KERNEL); 
+ 	if (!dentry)
+ 		return NULL;
+@@ -917,6 +925,7 @@ struct dentry *d_alloc(struct dentry * p
+ 	if (parent)
+ 		list_add(&dentry->d_u.d_child, &parent->d_subdirs);
+ 	dentry_stat.nr_dentry++;
++	vx_dentry_inc(dentry);
+ 	spin_unlock(&dcache_lock);
+ 
+ 	return dentry;
+@@ -1266,6 +1275,7 @@ struct dentry * __d_lookup(struct dentry
+ 
+ 		if (!d_unhashed(dentry)) {
+ 			atomic_inc(&dentry->d_count);
++			vx_dentry_inc(dentry);
+ 			found = dentry;
+ 		}
+ 		spin_unlock(&dentry->d_lock);
+Index: linux-2.6.20/fs/devpts/inode.c
+===================================================================
+--- linux-2.6.20.orig/fs/devpts/inode.c
++++ linux-2.6.20/fs/devpts/inode.c
+@@ -19,8 +19,22 @@
+ #include <linux/tty.h>
+ #include <linux/devpts_fs.h>
+ #include <linux/parser.h>
++#include <linux/vs_base.h>
+ 
+-#define DEVPTS_SUPER_MAGIC 0x1cd1
++
++static int devpts_permission(struct inode *inode, int mask, struct nameidata *nd)
++{
++	int ret = -EACCES;
++
++	/* devpts is xid tagged */
++	if (vx_check((xid_t)inode->i_tag, VS_WATCH_P|VS_IDENT))
++		ret = generic_permission(inode, mask, NULL);
++	return ret;
++}
++
++static struct inode_operations devpts_file_inode_operations = {
++	.permission     = devpts_permission,
++};
+ 
+ static struct vfsmount *devpts_mnt;
+ static struct dentry *devpts_root;
+@@ -91,6 +105,25 @@ static int devpts_remount(struct super_b
+ 	return 0;
+ }
+ 
++static int devpts_filter(struct dentry *de)
++{
++	/* devpts is xid tagged */
++	return vx_check((xid_t)de->d_inode->i_tag, VS_WATCH_P|VS_IDENT);
++}
++
++static int devpts_readdir(struct file * filp, void * dirent, filldir_t filldir)
++{
++	return dcache_readdir_filter(filp, dirent, filldir, devpts_filter);
++}
++
++static struct file_operations devpts_dir_operations = {
++	.open		= dcache_dir_open,
++	.release	= dcache_dir_close,
++	.llseek		= dcache_dir_lseek,
++	.read		= generic_read_dir,
++	.readdir	= devpts_readdir,
++};
++
+ static struct super_operations devpts_sops = {
+ 	.statfs		= simple_statfs,
+ 	.remount_fs	= devpts_remount,
+@@ -116,8 +149,10 @@ devpts_fill_super(struct super_block *s,
+ 	inode->i_uid = inode->i_gid = 0;
+ 	inode->i_mode = S_IFDIR | S_IRUGO | S_IXUGO | S_IWUSR;
+ 	inode->i_op = &simple_dir_inode_operations;
+-	inode->i_fop = &simple_dir_operations;
++	inode->i_fop = &devpts_dir_operations;
+ 	inode->i_nlink = 2;
++	/* devpts is xid tagged */
++	inode->i_tag = (tag_t)vx_current_xid();
+ 
+ 	devpts_root = s->s_root = d_alloc_root(inode);
+ 	if (s->s_root)
+@@ -175,6 +210,9 @@ int devpts_pty_new(struct tty_struct *tt
+ 	inode->i_gid = config.setgid ? config.gid : current->fsgid;
+ 	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
+ 	init_special_inode(inode, S_IFCHR|config.mode, device);
++	/* devpts is xid tagged */
++	inode->i_tag = (tag_t)vx_current_xid();
++	inode->i_op = &devpts_file_inode_operations;
+ 	inode->i_private = tty;
+ 
+ 	dentry = get_node(number);
+Index: linux-2.6.20/fs/dquot.c
+===================================================================
+--- linux-2.6.20.orig/fs/dquot.c
++++ linux-2.6.20/fs/dquot.c
+@@ -185,7 +185,7 @@ static void put_quota_format(struct quot
+ /*
+  * Dquot List Management:
+  * The quota code uses three lists for dquot management: the inuse_list,
+- * free_dquots, and dquot_hash[] array. A single dquot structure may be
++ * free_dquots, and hash->dqh_hash[] array. A single dquot structure may be
+  * on all three lists, depending on its current state.
+  *
+  * All dquots are placed to the end of inuse_list when first created, and this
+@@ -198,7 +198,7 @@ static void put_quota_format(struct quot
+  * dquot is invalidated it's completely released from memory.
+  *
+  * Dquots with a specific identity (device, type and id) are placed on
+- * one of the dquot_hash[] hash chains. The provides an efficient search
++ * one of the hash->dqh_hash[] hash chains. The provides an efficient search
+  * mechanism to locate a specific dquot.
+  */
+ 
+@@ -212,36 +212,44 @@ struct dqstats dqstats;
+ static void dqput(struct dquot *dquot);
+ 
+ static inline unsigned int
+-hashfn(const struct super_block *sb, unsigned int id, int type)
++hashfn(struct dqhash *hash, unsigned int id, int type)
+ {
+ 	unsigned long tmp;
+ 
+-	tmp = (((unsigned long)sb>>L1_CACHE_SHIFT) ^ id) * (MAXQUOTAS - type);
++	tmp = (((unsigned long)hash >> L1_CACHE_SHIFT) ^ id) * (MAXQUOTAS - type);
+ 	return (tmp + (tmp >> dq_hash_bits)) & dq_hash_mask;
+ }
+ 
+ /*
+  * Following list functions expect dq_list_lock to be held
+  */
+-static inline void insert_dquot_hash(struct dquot *dquot)
++static inline void insert_dquot_hash(struct dqhash *hash, struct dquot *dquot)
+ {
+-	struct hlist_head *head = dquot_hash + hashfn(dquot->dq_sb, dquot->dq_id, dquot->dq_type);
++	struct hlist_head *head = dquot_hash +
++		hashfn(hash, dquot->dq_id, dquot->dq_type);
++	/* struct hlist_head *head = hash->dqh_hash +
++		hashfn(dquot->dq_dqh, dquot->dq_id, dquot->dq_type); */
+ 	hlist_add_head(&dquot->dq_hash, head);
++	dquot->dq_dqh = dqhget(hash);
+ }
+ 
+ static inline void remove_dquot_hash(struct dquot *dquot)
+ {
+ 	hlist_del_init(&dquot->dq_hash);
++	dqhput(dquot->dq_dqh);
++	dquot->dq_dqh = NULL;
+ }
+ 
+-static inline struct dquot *find_dquot(unsigned int hashent, struct super_block *sb, unsigned int id, int type)
++static inline struct dquot *find_dquot(struct dqhash *hash,
++	unsigned int hashent, unsigned int id, int type)
+ {
+ 	struct hlist_node *node;
+ 	struct dquot *dquot;
+ 
+-	hlist_for_each (node, dquot_hash+hashent) {
++	/* hlist_for_each (node, hash->dqh_hash + hashent) { */
++	hlist_for_each (node, dquot_hash + hashent) {
+ 		dquot = hlist_entry(node, struct dquot, dq_hash);
+-		if (dquot->dq_sb == sb && dquot->dq_id == id && dquot->dq_type == type)
++		if (dquot->dq_dqh == hash && dquot->dq_id == id && dquot->dq_type == type)
+ 			return dquot;
+ 	}
+ 	return NODQUOT;
+@@ -285,13 +293,13 @@ static void wait_on_dquot(struct dquot *
+ 	mutex_unlock(&dquot->dq_lock);
+ }
+ 
+-#define mark_dquot_dirty(dquot) ((dquot)->dq_sb->dq_op->mark_dirty(dquot))
++#define mark_dquot_dirty(dquot) ((dquot)->dq_dqh->dqh_qop->mark_dirty(dquot))
+ 
+ int dquot_mark_dquot_dirty(struct dquot *dquot)
+ {
+ 	spin_lock(&dq_list_lock);
+ 	if (!test_and_set_bit(DQ_MOD_B, &dquot->dq_flags))
+-		list_add(&dquot->dq_dirty, &sb_dqopt(dquot->dq_sb)->
++		list_add(&dquot->dq_dirty, &dqh_dqopt(dquot->dq_dqh)->
+ 				info[dquot->dq_type].dqi_dirty_list);
+ 	spin_unlock(&dq_list_lock);
+ 	return 0;
+@@ -306,9 +314,9 @@ static inline int clear_dquot_dirty(stru
+ 	return 1;
+ }
+ 
+-void mark_info_dirty(struct super_block *sb, int type)
++void mark_info_dirty(struct dqhash *hash, int type)
+ {
+-	set_bit(DQF_INFO_DIRTY_B, &sb_dqopt(sb)->info[type].dqi_flags);
++	set_bit(DQF_INFO_DIRTY_B, &dqh_dqopt(hash)->info[type].dqi_flags);
+ }
+ EXPORT_SYMBOL(mark_info_dirty);
+ 
+@@ -319,7 +327,7 @@ EXPORT_SYMBOL(mark_info_dirty);
+ int dquot_acquire(struct dquot *dquot)
+ {
+ 	int ret = 0, ret2 = 0;
+-	struct quota_info *dqopt = sb_dqopt(dquot->dq_sb);
++	struct quota_info *dqopt = dqh_dqopt(dquot->dq_dqh);
+ 
+ 	mutex_lock(&dquot->dq_lock);
+ 	mutex_lock(&dqopt->dqio_mutex);
+@@ -333,7 +341,7 @@ int dquot_acquire(struct dquot *dquot)
+ 		ret = dqopt->ops[dquot->dq_type]->commit_dqblk(dquot);
+ 		/* Write the info if needed */
+ 		if (info_dirty(&dqopt->info[dquot->dq_type]))
+-			ret2 = dqopt->ops[dquot->dq_type]->write_file_info(dquot->dq_sb, dquot->dq_type);
++			ret2 = dqopt->ops[dquot->dq_type]->write_file_info(dquot->dq_dqh, dquot->dq_type);
+ 		if (ret < 0)
+ 			goto out_iolock;
+ 		if (ret2 < 0) {
+@@ -354,7 +362,7 @@ out_iolock:
+ int dquot_commit(struct dquot *dquot)
+ {
+ 	int ret = 0, ret2 = 0;
+-	struct quota_info *dqopt = sb_dqopt(dquot->dq_sb);
++	struct quota_info *dqopt = dqh_dqopt(dquot->dq_dqh);
+ 
+ 	mutex_lock(&dqopt->dqio_mutex);
+ 	spin_lock(&dq_list_lock);
+@@ -368,7 +376,7 @@ int dquot_commit(struct dquot *dquot)
+ 	if (test_bit(DQ_ACTIVE_B, &dquot->dq_flags)) {
+ 		ret = dqopt->ops[dquot->dq_type]->commit_dqblk(dquot);
+ 		if (info_dirty(&dqopt->info[dquot->dq_type]))
+-			ret2 = dqopt->ops[dquot->dq_type]->write_file_info(dquot->dq_sb, dquot->dq_type);
++			ret2 = dqopt->ops[dquot->dq_type]->write_file_info(dquot->dq_dqh, dquot->dq_type);
+ 		if (ret >= 0)
+ 			ret = ret2;
+ 	}
+@@ -383,7 +391,7 @@ out_sem:
+ int dquot_release(struct dquot *dquot)
+ {
+ 	int ret = 0, ret2 = 0;
+-	struct quota_info *dqopt = sb_dqopt(dquot->dq_sb);
++	struct quota_info *dqopt = dqh_dqopt(dquot->dq_dqh);
+ 
+ 	mutex_lock(&dquot->dq_lock);
+ 	/* Check whether we are not racing with some other dqget() */
+@@ -394,7 +402,7 @@ int dquot_release(struct dquot *dquot)
+ 		ret = dqopt->ops[dquot->dq_type]->release_dqblk(dquot);
+ 		/* Write the info */
+ 		if (info_dirty(&dqopt->info[dquot->dq_type]))
+-			ret2 = dqopt->ops[dquot->dq_type]->write_file_info(dquot->dq_sb, dquot->dq_type);
++			ret2 = dqopt->ops[dquot->dq_type]->write_file_info(dquot->dq_dqh, dquot->dq_type);
+ 		if (ret >= 0)
+ 			ret = ret2;
+ 	}
+@@ -411,14 +419,14 @@ out_dqlock:
+  * just deleted or pruned by prune_icache() (those are not attached to any
+  * list). We have to wait for such users.
+  */
+-static void invalidate_dquots(struct super_block *sb, int type)
++static void invalidate_dquots(struct dqhash *hash, int type)
+ {
+ 	struct dquot *dquot, *tmp;
+ 
+ restart:
+ 	spin_lock(&dq_list_lock);
+ 	list_for_each_entry_safe(dquot, tmp, &inuse_list, dq_inuse) {
+-		if (dquot->dq_sb != sb)
++		if (dquot->dq_dqh != hash)
+ 			continue;
+ 		if (dquot->dq_type != type)
+ 			continue;
+@@ -458,18 +466,18 @@ restart:
+ 	spin_unlock(&dq_list_lock);
+ }
+ 
+-int vfs_quota_sync(struct super_block *sb, int type)
++int vfs_quota_sync(struct dqhash *hash, int type)
+ {
+ 	struct list_head *dirty;
+ 	struct dquot *dquot;
+-	struct quota_info *dqopt = sb_dqopt(sb);
++	struct quota_info *dqopt = dqh_dqopt(hash);
+ 	int cnt;
+ 
+ 	mutex_lock(&dqopt->dqonoff_mutex);
+ 	for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
+ 		if (type != -1 && cnt != type)
+ 			continue;
+-		if (!sb_has_quota_enabled(sb, cnt))
++		if (!dqh_has_quota_enabled(hash, cnt))
+ 			continue;
+ 		spin_lock(&dq_list_lock);
+ 		dirty = &dqopt->info[cnt].dqi_dirty_list;
+@@ -486,7 +494,7 @@ int vfs_quota_sync(struct super_block *s
+ 			atomic_inc(&dquot->dq_count);
+ 			dqstats.lookups++;
+ 			spin_unlock(&dq_list_lock);
+-			sb->dq_op->write_dquot(dquot);
++			hash->dqh_qop->write_dquot(dquot);
+ 			dqput(dquot);
+ 			spin_lock(&dq_list_lock);
+ 		}
+@@ -494,9 +502,10 @@ int vfs_quota_sync(struct super_block *s
+ 	}
+ 
+ 	for (cnt = 0; cnt < MAXQUOTAS; cnt++)
+-		if ((cnt == type || type == -1) && sb_has_quota_enabled(sb, cnt)
++		if ((cnt == type || type == -1)
++			&& dqh_has_quota_enabled(hash, cnt)
+ 			&& info_dirty(&dqopt->info[cnt]))
+-			sb->dq_op->write_info(sb, cnt);
++			hash->dqh_qop->write_info(hash, cnt);
+ 	spin_lock(&dq_list_lock);
+ 	dqstats.syncs++;
+ 	spin_unlock(&dq_list_lock);
+@@ -551,7 +560,7 @@ static void dqput(struct dquot *dquot)
+ 	if (!atomic_read(&dquot->dq_count)) {
+ 		printk("VFS: dqput: trying to free free dquot\n");
+ 		printk("VFS: device %s, dquot of %s %d\n",
+-			dquot->dq_sb->s_id,
++			dquot->dq_dqh->dqh_sb->s_id,
+ 			quotatypes[dquot->dq_type],
+ 			dquot->dq_id);
+ 		BUG();
+@@ -567,7 +576,7 @@ we_slept:
+ 		/* We have more than one user... nothing to do */
+ 		atomic_dec(&dquot->dq_count);
+ 		/* Releasing dquot during quotaoff phase? */
+-		if (!sb_has_quota_enabled(dquot->dq_sb, dquot->dq_type) &&
++		if (!dqh_has_quota_enabled(dquot->dq_dqh, dquot->dq_type) &&
+ 		    atomic_read(&dquot->dq_count) == 1)
+ 			wake_up(&dquot->dq_wait_unused);
+ 		spin_unlock(&dq_list_lock);
+@@ -577,14 +586,14 @@ we_slept:
+ 	if (test_bit(DQ_ACTIVE_B, &dquot->dq_flags) && dquot_dirty(dquot)) {
+ 		spin_unlock(&dq_list_lock);
+ 		/* Commit dquot before releasing */
+-		dquot->dq_sb->dq_op->write_dquot(dquot);
++		dquot->dq_dqh->dqh_qop->write_dquot(dquot);
+ 		goto we_slept;
+ 	}
+ 	/* Clear flag in case dquot was inactive (something bad happened) */
+ 	clear_dquot_dirty(dquot);
+ 	if (test_bit(DQ_ACTIVE_B, &dquot->dq_flags)) {
+ 		spin_unlock(&dq_list_lock);
+-		dquot->dq_sb->dq_op->release_dquot(dquot);
++		dquot->dq_dqh->dqh_qop->release_dquot(dquot);
+ 		goto we_slept;
+ 	}
+ 	atomic_dec(&dquot->dq_count);
+@@ -596,7 +605,7 @@ we_slept:
+ 	spin_unlock(&dq_list_lock);
+ }
+ 
+-static struct dquot *get_empty_dquot(struct super_block *sb, int type)
++static struct dquot *get_empty_dquot(int type)
+ {
+ 	struct dquot *dquot;
+ 
+@@ -611,7 +620,7 @@ static struct dquot *get_empty_dquot(str
+ 	INIT_HLIST_NODE(&dquot->dq_hash);
+ 	INIT_LIST_HEAD(&dquot->dq_dirty);
+ 	init_waitqueue_head(&dquot->dq_wait_unused);
+-	dquot->dq_sb = sb;
++	dquot->dq_dqh = NULL;
+ 	dquot->dq_type = type;
+ 	atomic_set(&dquot->dq_count, 1);
+ 
+@@ -622,19 +631,19 @@ static struct dquot *get_empty_dquot(str
+  * Get reference to dquot
+  * MUST be called with either dqptr_sem or dqonoff_mutex held
+  */
+-static struct dquot *dqget(struct super_block *sb, unsigned int id, int type)
++static struct dquot *dqget(struct dqhash *hash, unsigned int id, int type)
+ {
+-	unsigned int hashent = hashfn(sb, id, type);
++	unsigned int hashent = hashfn(hash, id, type);
+ 	struct dquot *dquot, *empty = NODQUOT;
+ 
+-        if (!sb_has_quota_enabled(sb, type))
++	if (!dqh_has_quota_enabled(hash, type))
+ 		return NODQUOT;
+ we_slept:
+ 	spin_lock(&dq_list_lock);
+-	if ((dquot = find_dquot(hashent, sb, id, type)) == NODQUOT) {
++	if ((dquot = find_dquot(hash, hashent, id, type)) == NODQUOT) {
+ 		if (empty == NODQUOT) {
+ 			spin_unlock(&dq_list_lock);
+-			if ((empty = get_empty_dquot(sb, type)) == NODQUOT)
++			if ((empty = get_empty_dquot(type)) == NODQUOT)
+ 				schedule();	/* Try to wait for a moment... */
+ 			goto we_slept;
+ 		}
+@@ -643,7 +652,7 @@ we_slept:
+ 		/* all dquots go on the inuse_list */
+ 		put_inuse(dquot);
+ 		/* hash it first so it can be found */
+-		insert_dquot_hash(dquot);
++		insert_dquot_hash(hash, dquot);
+ 		dqstats.lookups++;
+ 		spin_unlock(&dq_list_lock);
+ 	} else {
+@@ -660,12 +669,13 @@ we_slept:
+ 	 * finished or it will be canceled due to dq_count > 1 test */
+ 	wait_on_dquot(dquot);
+ 	/* Read the dquot and instantiate it (everything done only if needed) */
+-	if (!test_bit(DQ_ACTIVE_B, &dquot->dq_flags) && sb->dq_op->acquire_dquot(dquot) < 0) {
++	if (!test_bit(DQ_ACTIVE_B, &dquot->dq_flags) &&
++		hash->dqh_qop->acquire_dquot(dquot) < 0) {
+ 		dqput(dquot);
+ 		return NODQUOT;
+ 	}
+ #ifdef __DQUOT_PARANOIA
+-	BUG_ON(!dquot->dq_sb);	/* Has somebody invalidated entry under us? */
++	BUG_ON(!dquot->dq_dqh);	/* Has somebody invalidated entry under us? */
+ #endif
+ 
+ 	return dquot;
+@@ -686,9 +696,10 @@ static int dqinit_needed(struct inode *i
+ }
+ 
+ /* This routine is guarded by dqonoff_mutex mutex */
+-static void add_dquot_ref(struct super_block *sb, int type)
++static void add_dquot_ref(struct dqhash *hash, int type)
+ {
+ 	struct list_head *p;
++	struct super_block *sb = hash->dqh_sb;
+ 
+ restart:
+ 	file_list_lock();
+@@ -698,7 +709,7 @@ restart:
+ 		if (filp->f_mode & FMODE_WRITE && dqinit_needed(inode, type)) {
+ 			struct dentry *dentry = dget(filp->f_path.dentry);
+ 			file_list_unlock();
+-			sb->dq_op->initialize(inode, type);
++			hash->dqh_qop->initialize(inode, type);
+ 			dput(dentry);
+ 			/* As we may have blocked we had better restart... */
+ 			goto restart;
+@@ -757,13 +768,13 @@ static void put_dquot_list(struct list_h
+ }
+ 
+ /* Gather all references from inodes and drop them */
+-static void drop_dquot_ref(struct super_block *sb, int type)
++static void drop_dquot_ref(struct dqhash *hash, int type)
+ {
+ 	LIST_HEAD(tofree_head);
+ 
+-	down_write(&sb_dqopt(sb)->dqptr_sem);
+-	remove_dquot_ref(sb, type, &tofree_head);
+-	up_write(&sb_dqopt(sb)->dqptr_sem);
++	down_write(&dqh_dqopt(hash)->dqptr_sem);
++	remove_dquot_ref(hash, type, &tofree_head);
++	up_write(&dqh_dqopt(hash)->dqptr_sem);
+ 	put_dquot_list(&tofree_head);
+ }
+ 
+@@ -839,7 +850,7 @@ static void print_warning(struct dquot *
+ 	tty = get_current_tty();
+ 	if (!tty)
+ 		goto out_lock;
+-	tty_write_message(tty, dquot->dq_sb->s_id);
++	tty_write_message(tty, dquot->dq_dqh->dqh_sb->s_id);
+ 	if (warntype == ISOFTWARN || warntype == BSOFTWARN)
+ 		tty_write_message(tty, ": warning, ");
+ 	else
+@@ -881,7 +892,7 @@ static inline void flush_warnings(struct
+ 
+ static inline char ignore_hardlimit(struct dquot *dquot)
+ {
+-	struct mem_dqinfo *info = &sb_dqopt(dquot->dq_sb)->info[dquot->dq_type];
++	struct mem_dqinfo *info = &dqh_dqopt(dquot->dq_dqh)->info[dquot->dq_type];
+ 
+ 	return capable(CAP_SYS_RESOURCE) &&
+ 	    (info->dqi_format->qf_fmt_id != QFMT_VFS_OLD || !(info->dqi_flags & V1_DQF_RSQUASH));
+@@ -913,7 +924,7 @@ static int check_idq(struct dquot *dquot
+ 	   (dquot->dq_dqb.dqb_curinodes + inodes) > dquot->dq_dqb.dqb_isoftlimit &&
+ 	    dquot->dq_dqb.dqb_itime == 0) {
+ 		*warntype = ISOFTWARN;
+-		dquot->dq_dqb.dqb_itime = get_seconds() + sb_dqopt(dquot->dq_sb)->info[dquot->dq_type].dqi_igrace;
++		dquot->dq_dqb.dqb_itime = get_seconds() + dqh_dqopt(dquot->dq_dqh)->info[dquot->dq_type].dqi_igrace;
+ 	}
+ 
+ 	return QUOTA_OK;
+@@ -948,7 +959,7 @@ static int check_bdq(struct dquot *dquot
+ 	    dquot->dq_dqb.dqb_btime == 0) {
+ 		if (!prealloc) {
+ 			*warntype = BSOFTWARN;
+-			dquot->dq_dqb.dqb_btime = get_seconds() + sb_dqopt(dquot->dq_sb)->info[dquot->dq_type].dqi_bgrace;
++			dquot->dq_dqb.dqb_btime = get_seconds() + dqh_dqopt(dquot->dq_dqh)->info[dquot->dq_type].dqi_bgrace;
+ 		}
+ 		else
+ 			/*
+@@ -974,7 +985,7 @@ int dquot_initialize(struct inode *inode
+          * re-enter the quota code and are already holding the mutex */
+ 	if (IS_NOQUOTA(inode))
+ 		return 0;
+-	down_write(&sb_dqopt(inode->i_sb)->dqptr_sem);
++	down_write(&dqh_dqopt(inode->i_dqh)->dqptr_sem);
+ 	/* Having dqptr_sem we know NOQUOTA flags can't be altered... */
+ 	if (IS_NOQUOTA(inode))
+ 		goto out_err;
+@@ -990,11 +1001,11 @@ int dquot_initialize(struct inode *inode
+ 					id = inode->i_gid;
+ 					break;
+ 			}
+-			inode->i_dquot[cnt] = dqget(inode->i_sb, id, cnt);
++			inode->i_dquot[cnt] = dqget(inode->i_dqh, id, cnt);
+ 		}
+ 	}
+ out_err:
+-	up_write(&sb_dqopt(inode->i_sb)->dqptr_sem);
++	up_write(&dqh_dqopt(inode->i_dqh)->dqptr_sem);
+ 	return ret;
+ }
+ 
+@@ -1006,14 +1017,14 @@ int dquot_drop(struct inode *inode)
+ {
+ 	int cnt;
+ 
+-	down_write(&sb_dqopt(inode->i_sb)->dqptr_sem);
++	down_write(&dqh_dqopt(inode->i_dqh)->dqptr_sem);
+ 	for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
+ 		if (inode->i_dquot[cnt] != NODQUOT) {
+ 			dqput(inode->i_dquot[cnt]);
+ 			inode->i_dquot[cnt] = NODQUOT;
+ 		}
+ 	}
+-	up_write(&sb_dqopt(inode->i_sb)->dqptr_sem);
++	up_write(&dqh_dqopt(inode->i_dqh)->dqptr_sem);
+ 	return 0;
+ }
+ 
+@@ -1044,9 +1055,9 @@ out_add:
+ 	for (cnt = 0; cnt < MAXQUOTAS; cnt++)
+ 		warntype[cnt] = NOWARN;
+ 
+-	down_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
++	down_read(&dqh_dqopt(inode->i_dqh)->dqptr_sem);
+ 	if (IS_NOQUOTA(inode)) {	/* Now we can do reliable test... */
+-		up_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
++		up_read(&dqh_dqopt(inode->i_dqh)->dqptr_sem);
+ 		goto out_add;
+ 	}
+ 	spin_lock(&dq_data_lock);
+@@ -1071,7 +1082,7 @@ warn_put_all:
+ 			if (inode->i_dquot[cnt])
+ 				mark_dquot_dirty(inode->i_dquot[cnt]);
+ 	flush_warnings(inode->i_dquot, warntype);
+-	up_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
++	up_read(&dqh_dqopt(inode->i_dqh)->dqptr_sem);
+ 	return ret;
+ }
+ 
+@@ -1089,9 +1100,9 @@ int dquot_alloc_inode(const struct inode
+ 		return QUOTA_OK;
+ 	for (cnt = 0; cnt < MAXQUOTAS; cnt++)
+ 		warntype[cnt] = NOWARN;
+-	down_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
++	down_read(&dqh_dqopt(inode->i_dqh)->dqptr_sem);
+ 	if (IS_NOQUOTA(inode)) {
+-		up_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
++		up_read(&dqh_dqopt(inode->i_dqh)->dqptr_sem);
+ 		return QUOTA_OK;
+ 	}
+ 	spin_lock(&dq_data_lock);
+@@ -1116,7 +1127,7 @@ warn_put_all:
+ 			if (inode->i_dquot[cnt])
+ 				mark_dquot_dirty(inode->i_dquot[cnt]);
+ 	flush_warnings((struct dquot **)inode->i_dquot, warntype);
+-	up_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
++	up_read(&dqh_dqopt(inode->i_dqh)->dqptr_sem);
+ 	return ret;
+ }
+ 
+@@ -1134,10 +1145,10 @@ out_sub:
+ 		inode_sub_bytes(inode, number);
+ 		return QUOTA_OK;
+ 	}
+-	down_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
++	down_read(&dqh_dqopt(inode->i_dqh)->dqptr_sem);
+ 	/* Now recheck reliably when holding dqptr_sem */
+ 	if (IS_NOQUOTA(inode)) {
+-		up_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
++		up_read(&dqh_dqopt(inode->i_dqh)->dqptr_sem);
+ 		goto out_sub;
+ 	}
+ 	spin_lock(&dq_data_lock);
+@@ -1152,7 +1163,7 @@ out_sub:
+ 	for (cnt = 0; cnt < MAXQUOTAS; cnt++)
+ 		if (inode->i_dquot[cnt])
+ 			mark_dquot_dirty(inode->i_dquot[cnt]);
+-	up_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
++	up_read(&dqh_dqopt(inode->i_dqh)->dqptr_sem);
+ 	return QUOTA_OK;
+ }
+ 
+@@ -1167,10 +1178,10 @@ int dquot_free_inode(const struct inode 
+          * re-enter the quota code and are already holding the mutex */
+ 	if (IS_NOQUOTA(inode))
+ 		return QUOTA_OK;
+-	down_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
++	down_read(&dqh_dqopt(inode->i_dqh)->dqptr_sem);
+ 	/* Now recheck reliably when holding dqptr_sem */
+ 	if (IS_NOQUOTA(inode)) {
+-		up_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
++		up_read(&dqh_dqopt(inode->i_dqh)->dqptr_sem);
+ 		return QUOTA_OK;
+ 	}
+ 	spin_lock(&dq_data_lock);
+@@ -1184,7 +1195,7 @@ int dquot_free_inode(const struct inode 
+ 	for (cnt = 0; cnt < MAXQUOTAS; cnt++)
+ 		if (inode->i_dquot[cnt])
+ 			mark_dquot_dirty(inode->i_dquot[cnt]);
+-	up_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
++	up_read(&dqh_dqopt(inode->i_dqh)->dqptr_sem);
+ 	return QUOTA_OK;
+ }
+ 
+@@ -1199,6 +1210,7 @@ int dquot_transfer(struct inode *inode, 
+ 	qsize_t space;
+ 	struct dquot *transfer_from[MAXQUOTAS];
+ 	struct dquot *transfer_to[MAXQUOTAS];
++	struct dqhash *dqh = inode->i_sb->s_dqh;
+ 	int cnt, ret = NO_QUOTA, chuid = (iattr->ia_valid & ATTR_UID) && inode->i_uid != iattr->ia_uid,
+ 	    chgid = (iattr->ia_valid & ATTR_GID) && inode->i_gid != iattr->ia_gid;
+ 	char warntype[MAXQUOTAS];
+@@ -1212,10 +1224,10 @@ int dquot_transfer(struct inode *inode, 
+ 		transfer_to[cnt] = transfer_from[cnt] = NODQUOT;
+ 		warntype[cnt] = NOWARN;
+ 	}
+-	down_write(&sb_dqopt(inode->i_sb)->dqptr_sem);
++	down_write(&dqh_dqopt(inode->i_dqh)->dqptr_sem);
+ 	/* Now recheck reliably when holding dqptr_sem */
+ 	if (IS_NOQUOTA(inode)) {	/* File without quota accounting? */
+-		up_write(&sb_dqopt(inode->i_sb)->dqptr_sem);
++		up_write(&dqh_dqopt(inode->i_dqh)->dqptr_sem);
+ 		return QUOTA_OK;
+ 	}
+ 	/* First build the transfer_to list - here we can block on
+@@ -1226,12 +1238,12 @@ int dquot_transfer(struct inode *inode, 
+ 			case USRQUOTA:
+ 				if (!chuid)
+ 					continue;
+-				transfer_to[cnt] = dqget(inode->i_sb, iattr->ia_uid, cnt);
++				transfer_to[cnt] = dqget(dqh, iattr->ia_uid, cnt);
+ 				break;
+ 			case GRPQUOTA:
+ 				if (!chgid)
+ 					continue;
+-				transfer_to[cnt] = dqget(inode->i_sb, iattr->ia_gid, cnt);
++				transfer_to[cnt] = dqget(dqh, iattr->ia_gid, cnt);
+ 				break;
+ 		}
+ 	}
+@@ -1286,20 +1298,20 @@ warn_put_all:
+ 		if (ret == NO_QUOTA && transfer_to[cnt] != NODQUOT)
+ 			dqput(transfer_to[cnt]);
+ 	}
+-	up_write(&sb_dqopt(inode->i_sb)->dqptr_sem);
++	up_write(&dqh_dqopt(inode->i_dqh)->dqptr_sem);
+ 	return ret;
+ }
+ 
+ /*
+  * Write info of quota file to disk
+  */
+-int dquot_commit_info(struct super_block *sb, int type)
++int dquot_commit_info(struct dqhash *hash, int type)
+ {
+ 	int ret;
+-	struct quota_info *dqopt = sb_dqopt(sb);
++	struct quota_info *dqopt = dqh_dqopt(hash);
+ 
+ 	mutex_lock(&dqopt->dqio_mutex);
+-	ret = dqopt->ops[type]->write_file_info(sb, type);
++	ret = dqopt->ops[type]->write_file_info(hash, type);
+ 	mutex_unlock(&dqopt->dqio_mutex);
+ 	return ret;
+ }
+@@ -1349,10 +1361,10 @@ static inline void reset_enable_flags(st
+ /*
+  * Turn quota off on a device. type == -1 ==> quotaoff for all types (umount)
+  */
+-int vfs_quota_off(struct super_block *sb, int type)
++int vfs_quota_off(struct dqhash *hash, int type)
+ {
+ 	int cnt;
+-	struct quota_info *dqopt = sb_dqopt(sb);
++	struct quota_info *dqopt = dqh_dqopt(hash);
+ 	struct inode *toputinode[MAXQUOTAS];
+ 
+ 	/* We need to serialize quota_off() for device */
+@@ -1361,21 +1373,21 @@ int vfs_quota_off(struct super_block *sb
+ 		toputinode[cnt] = NULL;
+ 		if (type != -1 && cnt != type)
+ 			continue;
+-		if (!sb_has_quota_enabled(sb, cnt))
++		if (!dqh_has_quota_enabled(hash, cnt))
+ 			continue;
+ 		reset_enable_flags(dqopt, cnt);
+ 
+ 		/* Note: these are blocking operations */
+-		drop_dquot_ref(sb, cnt);
+-		invalidate_dquots(sb, cnt);
++		drop_dquot_ref(hash, cnt);
++		invalidate_dquots(hash, cnt);
+ 		/*
+ 		 * Now all dquots should be invalidated, all writes done so we should be only
+ 		 * users of the info. No locks needed.
+ 		 */
+ 		if (info_dirty(&dqopt->info[cnt]))
+-			sb->dq_op->write_info(sb, cnt);
++			hash->dqh_qop->write_info(hash, cnt);
+ 		if (dqopt->ops[cnt]->free_file_info)
+-			dqopt->ops[cnt]->free_file_info(sb, cnt);
++			dqopt->ops[cnt]->free_file_info(hash, cnt);
+ 		put_quota_format(dqopt->info[cnt].dqi_format);
+ 
+ 		toputinode[cnt] = dqopt->files[cnt];
+@@ -1388,9 +1400,9 @@ int vfs_quota_off(struct super_block *sb
+ 	mutex_unlock(&dqopt->dqonoff_mutex);
+ 	/* Sync the superblock so that buffers with quota data are written to
+ 	 * disk (and so userspace sees correct data afterwards). */
+-	if (sb->s_op->sync_fs)
+-		sb->s_op->sync_fs(sb, 1);
+-	sync_blockdev(sb->s_bdev);
++	if (hash->dqh_sb->s_op->sync_fs)
++		hash->dqh_sb->s_op->sync_fs(hash->dqh_sb, 1);
++	sync_blockdev(hash->dqh_sb->s_bdev);
+ 	/* Now the quota files are just ordinary files and we can set the
+ 	 * inode flags back. Moreover we discard the pagecache so that
+ 	 * userspace sees the writes we did bypassing the pagecache. We
+@@ -1401,7 +1413,7 @@ int vfs_quota_off(struct super_block *sb
+ 			mutex_lock(&dqopt->dqonoff_mutex);
+ 			/* If quota was reenabled in the meantime, we have
+ 			 * nothing to do */
+-			if (!sb_has_quota_enabled(sb, cnt)) {
++			if (!dqh_has_quota_enabled(hash, cnt)) {
+ 				mutex_lock(&toputinode[cnt]->i_mutex);
+ 				toputinode[cnt]->i_flags &= ~(S_IMMUTABLE |
+ 				  S_NOATIME | S_NOQUOTA);
+@@ -1412,8 +1424,8 @@ int vfs_quota_off(struct super_block *sb
+ 			}
+ 			mutex_unlock(&dqopt->dqonoff_mutex);
+ 		}
+-	if (sb->s_bdev)
+-		invalidate_bdev(sb->s_bdev, 0);
++	if (hash->dqh_sb->s_bdev)
++		invalidate_bdev(hash->dqh_sb->s_bdev, 0);
+ 	return 0;
+ }
+ 
+@@ -1426,7 +1438,8 @@ static int vfs_quota_on_inode(struct ino
+ {
+ 	struct quota_format_type *fmt = find_quota_format(format_id);
+ 	struct super_block *sb = inode->i_sb;
+-	struct quota_info *dqopt = sb_dqopt(sb);
++	struct dqhash *hash = inode->i_dqh;
++	struct quota_info *dqopt = dqh_dqopt(hash);
+ 	int error;
+ 	int oldflags = -1;
+ 
+@@ -1452,7 +1465,7 @@ static int vfs_quota_on_inode(struct ino
+ 	invalidate_bdev(sb->s_bdev, 0);
+ 	mutex_lock(&inode->i_mutex);
+ 	mutex_lock(&dqopt->dqonoff_mutex);
+-	if (sb_has_quota_enabled(sb, type)) {
++	if (dqh_has_quota_enabled(hash, type)) {
+ 		error = -EBUSY;
+ 		goto out_lock;
+ 	}
+@@ -1463,21 +1476,21 @@ static int vfs_quota_on_inode(struct ino
+ 	oldflags = inode->i_flags & (S_NOATIME | S_IMMUTABLE | S_NOQUOTA);
+ 	inode->i_flags |= S_NOQUOTA | S_NOATIME | S_IMMUTABLE;
+ 	up_write(&dqopt->dqptr_sem);
+-	sb->dq_op->drop(inode);
++	hash->dqh_qop->drop(inode);
+ 
+ 	error = -EIO;
+ 	dqopt->files[type] = igrab(inode);
+ 	if (!dqopt->files[type])
+ 		goto out_lock;
+ 	error = -EINVAL;
+-	if (!fmt->qf_ops->check_quota_file(sb, type))
++	if (!fmt->qf_ops->check_quota_file(hash, type))
+ 		goto out_file_init;
+ 
+ 	dqopt->ops[type] = fmt->qf_ops;
+ 	dqopt->info[type].dqi_format = fmt;
+ 	INIT_LIST_HEAD(&dqopt->info[type].dqi_dirty_list);
+ 	mutex_lock(&dqopt->dqio_mutex);
+-	if ((error = dqopt->ops[type]->read_file_info(sb, type)) < 0) {
++	if ((error = dqopt->ops[type]->read_file_info(hash, type)) < 0) {
+ 		mutex_unlock(&dqopt->dqio_mutex);
+ 		goto out_file_init;
+ 	}
+@@ -1485,7 +1498,7 @@ static int vfs_quota_on_inode(struct ino
+ 	mutex_unlock(&inode->i_mutex);
+ 	set_enable_flags(dqopt, type);
+ 
+-	add_dquot_ref(sb, type);
++	add_dquot_ref(hash, type);
+ 	mutex_unlock(&dqopt->dqonoff_mutex);
+ 
+ 	return 0;
+@@ -1511,7 +1524,7 @@ out_fmt:
+ }
+ 
+ /* Actual function called from quotactl() */
+-int vfs_quota_on(struct super_block *sb, int type, int format_id, char *path)
++int vfs_quota_on(struct dqhash *hash, int type, int format_id, char *path)
+ {
+ 	struct nameidata nd;
+ 	int error;
+@@ -1523,7 +1536,7 @@ int vfs_quota_on(struct super_block *sb,
+ 	if (error)
+ 		goto out_path;
+ 	/* Quota file not on the same filesystem? */
+-	if (nd.mnt->mnt_sb != sb)
++	if (nd.mnt->mnt_sb != hash->dqh_sb)
+ 		error = -EXDEV;
+ 	else
+ 		error = vfs_quota_on_inode(nd.dentry->d_inode, type, format_id);
+@@ -1536,13 +1549,13 @@ out_path:
+  * This function is used when filesystem needs to initialize quotas
+  * during mount time.
+  */
+-int vfs_quota_on_mount(struct super_block *sb, char *qf_name,
++int vfs_quota_on_mount(struct dqhash *hash, char *qf_name,
+ 		int format_id, int type)
+ {
+ 	struct dentry *dentry;
+ 	int error;
+ 
+-	dentry = lookup_one_len(qf_name, sb->s_root, strlen(qf_name));
++	dentry = lookup_one_len(qf_name, hash->dqh_sb->s_root, strlen(qf_name));
+ 	if (IS_ERR(dentry))
+ 		return PTR_ERR(dentry);
+ 
+@@ -1578,18 +1591,18 @@ static void do_get_dqblk(struct dquot *d
+ 	spin_unlock(&dq_data_lock);
+ }
+ 
+-int vfs_get_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di)
++int vfs_get_dqblk(struct dqhash *hash, int type, qid_t id, struct if_dqblk *di)
+ {
+ 	struct dquot *dquot;
+ 
+-	mutex_lock(&sb_dqopt(sb)->dqonoff_mutex);
+-	if (!(dquot = dqget(sb, id, type))) {
+-		mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex);
++	mutex_lock(&dqh_dqopt(hash)->dqonoff_mutex);
++	if (!(dquot = dqget(hash, id, type))) {
++		mutex_unlock(&dqh_dqopt(hash)->dqonoff_mutex);
+ 		return -ESRCH;
+ 	}
+ 	do_get_dqblk(dquot, di);
+ 	dqput(dquot);
+-	mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex);
++	mutex_unlock(&dqh_dqopt(hash)->dqonoff_mutex);
+ 	return 0;
+ }
+ 
+@@ -1629,7 +1642,7 @@ static void do_set_dqblk(struct dquot *d
+ 			clear_bit(DQ_BLKS_B, &dquot->dq_flags);
+ 		}
+ 		else if (!(di->dqb_valid & QIF_BTIME))	/* Set grace only if user hasn't provided his own... */
+-			dm->dqb_btime = get_seconds() + sb_dqopt(dquot->dq_sb)->info[dquot->dq_type].dqi_bgrace;
++			dm->dqb_btime = get_seconds() + dqh_dqopt(dquot->dq_dqh)->info[dquot->dq_type].dqi_bgrace;
+ 	}
+ 	if (check_ilim) {
+ 		if (!dm->dqb_isoftlimit || dm->dqb_curinodes < dm->dqb_isoftlimit) {
+@@ -1637,7 +1650,7 @@ static void do_set_dqblk(struct dquot *d
+ 			clear_bit(DQ_INODES_B, &dquot->dq_flags);
+ 		}
+ 		else if (!(di->dqb_valid & QIF_ITIME))	/* Set grace only if user hasn't provided his own... */
+-			dm->dqb_itime = get_seconds() + sb_dqopt(dquot->dq_sb)->info[dquot->dq_type].dqi_igrace;
++			dm->dqb_itime = get_seconds() + dqh_dqopt(dquot->dq_dqh)->info[dquot->dq_type].dqi_igrace;
+ 	}
+ 	if (dm->dqb_bhardlimit || dm->dqb_bsoftlimit || dm->dqb_ihardlimit || dm->dqb_isoftlimit)
+ 		clear_bit(DQ_FAKE_B, &dquot->dq_flags);
+@@ -1647,53 +1660,53 @@ static void do_set_dqblk(struct dquot *d
+ 	mark_dquot_dirty(dquot);
+ }
+ 
+-int vfs_set_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di)
++int vfs_set_dqblk(struct dqhash *hash, int type, qid_t id, struct if_dqblk *di)
+ {
+ 	struct dquot *dquot;
+ 
+-	mutex_lock(&sb_dqopt(sb)->dqonoff_mutex);
+-	if (!(dquot = dqget(sb, id, type))) {
+-		mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex);
++	mutex_lock(&dqh_dqopt(hash)->dqonoff_mutex);
++	if (!(dquot = dqget(hash, id, type))) {
++		mutex_unlock(&dqh_dqopt(hash)->dqonoff_mutex);
+ 		return -ESRCH;
+ 	}
+ 	do_set_dqblk(dquot, di);
+ 	dqput(dquot);
+-	mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex);
++	mutex_unlock(&dqh_dqopt(hash)->dqonoff_mutex);
+ 	return 0;
+ }
+ 
+ /* Generic routine for getting common part of quota file information */
+-int vfs_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii)
++int vfs_get_dqinfo(struct dqhash *hash, int type, struct if_dqinfo *ii)
+ {
+ 	struct mem_dqinfo *mi;
+   
+-	mutex_lock(&sb_dqopt(sb)->dqonoff_mutex);
+-	if (!sb_has_quota_enabled(sb, type)) {
+-		mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex);
++	mutex_lock(&dqh_dqopt(hash)->dqonoff_mutex);
++	if (!dqh_has_quota_enabled(hash, type)) {
++		mutex_unlock(&dqh_dqopt(hash)->dqonoff_mutex);
+ 		return -ESRCH;
+ 	}
+-	mi = sb_dqopt(sb)->info + type;
++	mi = dqh_dqopt(hash)->info + type;
+ 	spin_lock(&dq_data_lock);
+ 	ii->dqi_bgrace = mi->dqi_bgrace;
+ 	ii->dqi_igrace = mi->dqi_igrace;
+ 	ii->dqi_flags = mi->dqi_flags & DQF_MASK;
+ 	ii->dqi_valid = IIF_ALL;
+ 	spin_unlock(&dq_data_lock);
+-	mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex);
++	mutex_unlock(&dqh_dqopt(hash)->dqonoff_mutex);
+ 	return 0;
+ }
+ 
+ /* Generic routine for setting common part of quota file information */
+-int vfs_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii)
++int vfs_set_dqinfo(struct dqhash *hash, int type, struct if_dqinfo *ii)
+ {
+ 	struct mem_dqinfo *mi;
+ 
+-	mutex_lock(&sb_dqopt(sb)->dqonoff_mutex);
+-	if (!sb_has_quota_enabled(sb, type)) {
+-		mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex);
++	mutex_lock(&dqh_dqopt(hash)->dqonoff_mutex);
++	if (!dqh_has_quota_enabled(hash, type)) {
++		mutex_unlock(&dqh_dqopt(hash)->dqonoff_mutex);
+ 		return -ESRCH;
+ 	}
+-	mi = sb_dqopt(sb)->info + type;
++	mi = dqh_dqopt(hash)->info + type;
+ 	spin_lock(&dq_data_lock);
+ 	if (ii->dqi_valid & IIF_BGRACE)
+ 		mi->dqi_bgrace = ii->dqi_bgrace;
+@@ -1702,10 +1715,10 @@ int vfs_set_dqinfo(struct super_block *s
+ 	if (ii->dqi_valid & IIF_FLAGS)
+ 		mi->dqi_flags = (mi->dqi_flags & ~DQF_MASK) | (ii->dqi_flags & DQF_MASK);
+ 	spin_unlock(&dq_data_lock);
+-	mark_info_dirty(sb, type);
++	mark_info_dirty(hash, type);
+ 	/* Force write to disk */
+-	sb->dq_op->write_info(sb, type);
+-	mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex);
++	hash->dqh_qop->write_info(hash, type);
++	mutex_unlock(&dqh_dqopt(hash)->dqonoff_mutex);
+ 	return 0;
+ }
+ 
+Index: linux-2.6.20/fs/ecryptfs/inode.c
+===================================================================
+--- linux-2.6.20.orig/fs/ecryptfs/inode.c
++++ linux-2.6.20/fs/ecryptfs/inode.c
+@@ -415,7 +415,7 @@ static int ecryptfs_link(struct dentry *
+ 	dget(lower_new_dentry);
+ 	lower_dir_dentry = lock_parent(lower_new_dentry);
+ 	rc = vfs_link(lower_old_dentry, lower_dir_dentry->d_inode,
+-		      lower_new_dentry);
++		      lower_new_dentry, NULL);
+ 	if (rc || !lower_new_dentry->d_inode)
+ 		goto out_lock;
+ 	rc = ecryptfs_interpose(lower_new_dentry, new_dentry, dir->i_sb, 0);
+@@ -443,7 +443,7 @@ static int ecryptfs_unlink(struct inode 
+ 	struct inode *lower_dir_inode = ecryptfs_inode_to_lower(dir);
+ 
+ 	lock_parent(lower_dentry);
+-	rc = vfs_unlink(lower_dir_inode, lower_dentry);
++	rc = vfs_unlink(lower_dir_inode, lower_dentry, NULL);
+ 	if (rc) {
+ 		printk(KERN_ERR "Error in vfs_unlink; rc = [%d]\n", rc);
+ 		goto out_unlock;
+@@ -480,7 +480,7 @@ static int ecryptfs_symlink(struct inode
+ 		goto out_lock;
+ 	}
+ 	rc = vfs_symlink(lower_dir_dentry->d_inode, lower_dentry,
+-			 encoded_symname, mode);
++			 encoded_symname, mode, NULL);
+ 	kfree(encoded_symname);
+ 	if (rc || !lower_dentry->d_inode)
+ 		goto out_lock;
+@@ -505,7 +505,7 @@ static int ecryptfs_mkdir(struct inode *
+ 
+ 	lower_dentry = ecryptfs_dentry_to_lower(dentry);
+ 	lower_dir_dentry = lock_parent(lower_dentry);
+-	rc = vfs_mkdir(lower_dir_dentry->d_inode, lower_dentry, mode);
++	rc = vfs_mkdir(lower_dir_dentry->d_inode, lower_dentry, mode, NULL);
+ 	if (rc || !lower_dentry->d_inode)
+ 		goto out;
+ 	rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb, 0);
+@@ -531,7 +531,7 @@ static int ecryptfs_rmdir(struct inode *
+ 	dget(dentry);
+ 	lower_dir_dentry = lock_parent(lower_dentry);
+ 	dget(lower_dentry);
+-	rc = vfs_rmdir(lower_dir_dentry->d_inode, lower_dentry);
++	rc = vfs_rmdir(lower_dir_dentry->d_inode, lower_dentry, NULL);
+ 	dput(lower_dentry);
+ 	if (!rc)
+ 		d_delete(lower_dentry);
+@@ -553,7 +553,7 @@ ecryptfs_mknod(struct inode *dir, struct
+ 
+ 	lower_dentry = ecryptfs_dentry_to_lower(dentry);
+ 	lower_dir_dentry = lock_parent(lower_dentry);
+-	rc = vfs_mknod(lower_dir_dentry->d_inode, lower_dentry, mode, dev);
++	rc = vfs_mknod(lower_dir_dentry->d_inode, lower_dentry, mode, dev, NULL);
+ 	if (rc || !lower_dentry->d_inode)
+ 		goto out;
+ 	rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb, 0);
+Index: linux-2.6.20/fs/exec.c
+===================================================================
+--- linux-2.6.20.orig/fs/exec.c
++++ linux-2.6.20/fs/exec.c
+@@ -50,6 +50,7 @@
+ #include <linux/tsacct_kern.h>
+ #include <linux/cn_proc.h>
+ #include <linux/audit.h>
++#include <linux/vs_memory.h>
+ 
+ #include <asm/uaccess.h>
+ #include <asm/mmu_context.h>
+@@ -437,7 +438,8 @@ int setup_arg_pages(struct linux_binprm 
+ 			kmem_cache_free(vm_area_cachep, mpnt);
+ 			return ret;
+ 		}
+-		mm->stack_vm = mm->total_vm = vma_pages(mpnt);
++		vx_vmpages_sub(mm, mm->total_vm - vma_pages(mpnt));
++		mm->stack_vm = mm->total_vm;
+ 	}
+ 
+ 	for (i = 0 ; i < MAX_ARG_PAGES ; i++) {
+@@ -1307,7 +1309,7 @@ static void format_corename(char *corena
+ 			/* UNIX time of coredump */
+ 			case 't': {
+ 				struct timeval tv;
+-				do_gettimeofday(&tv);
++				vx_gettimeofday(&tv);
+ 				rc = snprintf(out_ptr, out_end - out_ptr,
+ 					      "%lu", tv.tv_sec);
+ 				if (rc > out_end - out_ptr)
+Index: linux-2.6.20/fs/ext2/balloc.c
+===================================================================
+--- linux-2.6.20.orig/fs/ext2/balloc.c
++++ linux-2.6.20/fs/ext2/balloc.c
+@@ -16,6 +16,8 @@
+ #include <linux/sched.h>
+ #include <linux/buffer_head.h>
+ #include <linux/capability.h>
++#include <linux/vs_dlimit.h>
++#include <linux/vs_tag.h>
+ 
+ /*
+  * balloc.c contains the blocks allocation and deallocation routines
+@@ -102,12 +104,13 @@ static int reserve_blocks(struct super_b
+ {
+ 	struct ext2_sb_info *sbi = EXT2_SB(sb);
+ 	struct ext2_super_block *es = sbi->s_es;
+-	unsigned free_blocks;
+-	unsigned root_blocks;
++	unsigned long long free_blocks, root_blocks;
+ 
+ 	free_blocks = percpu_counter_read_positive(&sbi->s_freeblocks_counter);
+ 	root_blocks = le32_to_cpu(es->s_r_blocks_count);
+ 
++	DLIMIT_ADJUST_BLOCK(sb, dx_current_tag(), &free_blocks, &root_blocks);
++
+ 	if (free_blocks < count)
+ 		count = free_blocks;
+ 
+@@ -258,6 +261,7 @@ do_more:
+ 	}
+ error_return:
+ 	brelse(bitmap_bh);
++	DLIMIT_FREE_BLOCK(inode, freed);
+ 	release_blocks(sb, freed);
+ 	DQUOT_FREE_BLOCK(inode, freed);
+ }
+@@ -361,6 +365,10 @@ int ext2_new_block(struct inode *inode, 
+ 		*err = -ENOSPC;
+ 		goto out_dquot;
+ 	}
++	if (DLIMIT_ALLOC_BLOCK(inode, es_alloc)) {
++		*err = -ENOSPC;
++		goto out_dlimit;
++	}
+ 
+ 	ext2_debug ("goal=%lu.\n", goal);
+ 
+@@ -508,6 +516,8 @@ got_block:
+ 	*err = 0;
+ out_release:
+ 	group_release_blocks(sb, group_no, desc, gdp_bh, group_alloc);
++	DLIMIT_FREE_BLOCK(inode, es_alloc);
++out_dlimit:
+ 	release_blocks(sb, es_alloc);
+ out_dquot:
+ 	DQUOT_FREE_BLOCK(inode, dq_alloc);
+Index: linux-2.6.20/fs/ext2/ext2.h
+===================================================================
+--- linux-2.6.20.orig/fs/ext2/ext2.h
++++ linux-2.6.20/fs/ext2/ext2.h
+@@ -166,6 +166,7 @@ extern const struct file_operations ext2
+ extern const struct address_space_operations ext2_aops;
+ extern const struct address_space_operations ext2_aops_xip;
+ extern const struct address_space_operations ext2_nobh_aops;
++extern int ext2_sync_flags(struct inode *inode);
+ 
+ /* namei.c */
+ extern struct inode_operations ext2_dir_inode_operations;
+Index: linux-2.6.20/fs/ext2/file.c
+===================================================================
+--- linux-2.6.20.orig/fs/ext2/file.c
++++ linux-2.6.20/fs/ext2/file.c
+@@ -54,6 +54,7 @@ const struct file_operations ext2_file_o
+ 	.release	= ext2_release_file,
+ 	.fsync		= ext2_sync_file,
+ 	.sendfile	= generic_file_sendfile,
++	.sendpage	= generic_file_sendpage,
+ 	.splice_read	= generic_file_splice_read,
+ 	.splice_write	= generic_file_splice_write,
+ };
+@@ -85,4 +86,5 @@ struct inode_operations ext2_file_inode_
+ #endif
+ 	.setattr	= ext2_setattr,
+ 	.permission	= ext2_permission,
++	.sync_flags	= ext2_sync_flags,
+ };
+Index: linux-2.6.20/fs/ext2/ialloc.c
+===================================================================
+--- linux-2.6.20.orig/fs/ext2/ialloc.c
++++ linux-2.6.20/fs/ext2/ialloc.c
+@@ -17,6 +17,8 @@
+ #include <linux/backing-dev.h>
+ #include <linux/buffer_head.h>
+ #include <linux/random.h>
++#include <linux/vs_dlimit.h>
++#include <linux/vs_tag.h>
+ #include "ext2.h"
+ #include "xattr.h"
+ #include "acl.h"
+@@ -125,6 +127,7 @@ void ext2_free_inode (struct inode * ino
+ 		ext2_xattr_delete_inode(inode);
+ 	    	DQUOT_FREE_INODE(inode);
+ 		DQUOT_DROP(inode);
++		DLIMIT_FREE_INODE(inode);
+ 	}
+ 
+ 	es = EXT2_SB(sb)->s_es;
+@@ -464,6 +467,11 @@ struct inode *ext2_new_inode(struct inod
+ 	if (!inode)
+ 		return ERR_PTR(-ENOMEM);
+ 
++	inode->i_tag = dx_current_fstag(sb);
++	if (DLIMIT_ALLOC_INODE(inode)) {
++		err = -ENOSPC;
++		goto fail_dlim;
++	}
+ 	ei = EXT2_I(inode);
+ 	sbi = EXT2_SB(sb);
+ 	es = sbi->s_es;
+@@ -577,7 +585,8 @@ got:
+ 	inode->i_blocks = 0;
+ 	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
+ 	memset(ei->i_data, 0, sizeof(ei->i_data));
+-	ei->i_flags = EXT2_I(dir)->i_flags & ~EXT2_BTREE_FL;
++	ei->i_flags = EXT2_I(dir)->i_flags &
++		~(EXT2_BTREE_FL|EXT2_IUNLINK_FL|EXT2_BARRIER_FL);
+ 	if (S_ISLNK(mode))
+ 		ei->i_flags &= ~(EXT2_IMMUTABLE_FL|EXT2_APPEND_FL);
+ 	/* dirsync is only applied to directories */
+@@ -625,12 +634,15 @@ fail_free_drop:
+ 
+ fail_drop:
+ 	DQUOT_DROP(inode);
++	DLIMIT_FREE_INODE(inode);
+ 	inode->i_flags |= S_NOQUOTA;
+ 	inode->i_nlink = 0;
+ 	iput(inode);
+ 	return ERR_PTR(err);
+ 
+ fail:
++	DLIMIT_FREE_INODE(inode);
++fail_dlim:
+ 	make_bad_inode(inode);
+ 	iput(inode);
+ 	return ERR_PTR(err);
+Index: linux-2.6.20/fs/ext2/inode.c
+===================================================================
+--- linux-2.6.20.orig/fs/ext2/inode.c
++++ linux-2.6.20/fs/ext2/inode.c
+@@ -31,6 +31,7 @@
+ #include <linux/writeback.h>
+ #include <linux/buffer_head.h>
+ #include <linux/mpage.h>
++#include <linux/vs_tag.h>
+ #include "ext2.h"
+ #include "acl.h"
+ #include "xip.h"
+@@ -913,7 +914,7 @@ void ext2_truncate (struct inode * inode
+ 		return;
+ 	if (ext2_inode_is_fast_symlink(inode))
+ 		return;
+-	if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
++	if (IS_APPEND(inode) || IS_IXORUNLINK(inode))
+ 		return;
+ 
+ 	ext2_discard_prealloc(inode);
+@@ -1042,25 +1043,57 @@ void ext2_set_inode_flags(struct inode *
+ {
+ 	unsigned int flags = EXT2_I(inode)->i_flags;
+ 
+-	inode->i_flags &= ~(S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC);
++	inode->i_flags &= ~(S_IMMUTABLE | S_IUNLINK | S_BARRIER |
++		S_SYNC | S_APPEND | S_NOATIME | S_DIRSYNC);
++
++	if (flags & EXT2_IMMUTABLE_FL)
++		inode->i_flags |= S_IMMUTABLE;
++	if (flags & EXT2_IUNLINK_FL)
++		inode->i_flags |= S_IUNLINK;
++	if (flags & EXT2_BARRIER_FL)
++		inode->i_flags |= S_BARRIER;
++
+ 	if (flags & EXT2_SYNC_FL)
+ 		inode->i_flags |= S_SYNC;
+ 	if (flags & EXT2_APPEND_FL)
+ 		inode->i_flags |= S_APPEND;
+-	if (flags & EXT2_IMMUTABLE_FL)
+-		inode->i_flags |= S_IMMUTABLE;
+ 	if (flags & EXT2_NOATIME_FL)
+ 		inode->i_flags |= S_NOATIME;
+ 	if (flags & EXT2_DIRSYNC_FL)
+ 		inode->i_flags |= S_DIRSYNC;
+ }
+ 
++int ext2_sync_flags(struct inode *inode)
++{
++	unsigned int oldflags, newflags;
++
++	oldflags = EXT2_I(inode)->i_flags;
++	newflags = oldflags & ~(EXT2_IMMUTABLE_FL |
++		EXT2_IUNLINK_FL | EXT2_BARRIER_FL);
++
++	if (IS_IMMUTABLE(inode))
++		newflags |= EXT2_IMMUTABLE_FL;
++	if (IS_IUNLINK(inode))
++		newflags |= EXT2_IUNLINK_FL;
++	if (IS_BARRIER(inode))
++		newflags |= EXT2_BARRIER_FL;
++
++	if (oldflags ^ newflags) {
++		EXT2_I(inode)->i_flags = newflags;
++		inode->i_ctime = CURRENT_TIME;
++		mark_inode_dirty(inode);
++	}
++	return 0;
++}
++
+ void ext2_read_inode (struct inode * inode)
+ {
+ 	struct ext2_inode_info *ei = EXT2_I(inode);
+ 	ino_t ino = inode->i_ino;
+ 	struct buffer_head * bh;
+ 	struct ext2_inode * raw_inode = ext2_get_inode(inode->i_sb, ino, &bh);
++	uid_t uid;
++	gid_t gid;
+ 	int n;
+ 
+ #ifdef CONFIG_EXT2_FS_POSIX_ACL
+@@ -1071,12 +1104,17 @@ void ext2_read_inode (struct inode * ino
+  		goto bad_inode;
+ 
+ 	inode->i_mode = le16_to_cpu(raw_inode->i_mode);
+-	inode->i_uid = (uid_t)le16_to_cpu(raw_inode->i_uid_low);
+-	inode->i_gid = (gid_t)le16_to_cpu(raw_inode->i_gid_low);
++	uid = (uid_t)le16_to_cpu(raw_inode->i_uid_low);
++	gid = (gid_t)le16_to_cpu(raw_inode->i_gid_low);
+ 	if (!(test_opt (inode->i_sb, NO_UID32))) {
+-		inode->i_uid |= le16_to_cpu(raw_inode->i_uid_high) << 16;
+-		inode->i_gid |= le16_to_cpu(raw_inode->i_gid_high) << 16;
++		uid |= le16_to_cpu(raw_inode->i_uid_high) << 16;
++		gid |= le16_to_cpu(raw_inode->i_gid_high) << 16;
+ 	}
++	inode->i_uid = INOTAG_UID(DX_TAG(inode), uid, gid);
++	inode->i_gid = INOTAG_GID(DX_TAG(inode), uid, gid);
++	inode->i_tag = INOTAG_TAG(DX_TAG(inode), uid, gid,
++		le16_to_cpu(raw_inode->i_raw_tag));
++
+ 	inode->i_nlink = le16_to_cpu(raw_inode->i_links_count);
+ 	inode->i_size = le32_to_cpu(raw_inode->i_size);
+ 	inode->i_atime.tv_sec = le32_to_cpu(raw_inode->i_atime);
+@@ -1173,8 +1211,8 @@ static int ext2_update_inode(struct inod
+ 	struct ext2_inode_info *ei = EXT2_I(inode);
+ 	struct super_block *sb = inode->i_sb;
+ 	ino_t ino = inode->i_ino;
+-	uid_t uid = inode->i_uid;
+-	gid_t gid = inode->i_gid;
++	uid_t uid = TAGINO_UID(DX_TAG(inode), inode->i_uid, inode->i_tag);
++	gid_t gid = TAGINO_GID(DX_TAG(inode), inode->i_gid, inode->i_tag);
+ 	struct buffer_head * bh;
+ 	struct ext2_inode * raw_inode = ext2_get_inode(sb, ino, &bh);
+ 	int n;
+@@ -1209,6 +1247,9 @@ static int ext2_update_inode(struct inod
+ 		raw_inode->i_uid_high = 0;
+ 		raw_inode->i_gid_high = 0;
+ 	}
++#ifdef CONFIG_TAGGING_INTERN
++	raw_inode->i_raw_tag = cpu_to_le16(inode->i_tag);
++#endif
+ 	raw_inode->i_links_count = cpu_to_le16(inode->i_nlink);
+ 	raw_inode->i_size = cpu_to_le32(inode->i_size);
+ 	raw_inode->i_atime = cpu_to_le32(inode->i_atime.tv_sec);
+@@ -1295,7 +1336,8 @@ int ext2_setattr(struct dentry *dentry, 
+ 	if (error)
+ 		return error;
+ 	if ((iattr->ia_valid & ATTR_UID && iattr->ia_uid != inode->i_uid) ||
+-	    (iattr->ia_valid & ATTR_GID && iattr->ia_gid != inode->i_gid)) {
++	    (iattr->ia_valid & ATTR_GID && iattr->ia_gid != inode->i_gid) ||
++	    (iattr->ia_valid & ATTR_TAG && iattr->ia_tag != inode->i_tag)) {
+ 		error = DQUOT_TRANSFER(inode, iattr) ? -EDQUOT : 0;
+ 		if (error)
+ 			return error;
+Index: linux-2.6.20/fs/ext2/ioctl.c
+===================================================================
+--- linux-2.6.20.orig/fs/ext2/ioctl.c
++++ linux-2.6.20/fs/ext2/ioctl.c
+@@ -13,6 +13,7 @@
+ #include <linux/sched.h>
+ #include <linux/compat.h>
+ #include <linux/smp_lock.h>
++#include <linux/mount.h>
+ #include <asm/current.h>
+ #include <asm/uaccess.h>
+ 
+@@ -32,7 +33,8 @@ int ext2_ioctl (struct inode * inode, st
+ 	case EXT2_IOC_SETFLAGS: {
+ 		unsigned int oldflags;
+ 
+-		if (IS_RDONLY(inode))
++		if (IS_RDONLY(inode) ||
++			(filp && MNT_IS_RDONLY(filp->f_vfsmnt)))
+ 			return -EROFS;
+ 
+ 		if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+@@ -53,7 +55,9 @@ int ext2_ioctl (struct inode * inode, st
+ 		 *
+ 		 * This test looks nicer. Thanks to Pauline Middelink
+ 		 */
+-		if ((flags ^ oldflags) & (EXT2_APPEND_FL | EXT2_IMMUTABLE_FL)) {
++		if ((oldflags & EXT2_IMMUTABLE_FL) ||
++			((flags ^ oldflags) & (EXT2_APPEND_FL |
++			EXT2_IMMUTABLE_FL | EXT2_IUNLINK_FL))) {
+ 			if (!capable(CAP_LINUX_IMMUTABLE)) {
+ 				mutex_unlock(&inode->i_mutex);
+ 				return -EPERM;
+@@ -75,7 +79,8 @@ int ext2_ioctl (struct inode * inode, st
+ 	case EXT2_IOC_SETVERSION:
+ 		if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+ 			return -EPERM;
+-		if (IS_RDONLY(inode))
++		if (IS_RDONLY(inode) ||
++			(filp && MNT_IS_RDONLY(filp->f_vfsmnt)))
+ 			return -EROFS;
+ 		if (get_user(inode->i_generation, (int __user *) arg))
+ 			return -EFAULT;	
+Index: linux-2.6.20/fs/ext2/namei.c
+===================================================================
+--- linux-2.6.20.orig/fs/ext2/namei.c
++++ linux-2.6.20/fs/ext2/namei.c
+@@ -31,6 +31,7 @@
+  */
+ 
+ #include <linux/pagemap.h>
++#include <linux/vs_tag.h>
+ #include "ext2.h"
+ #include "xattr.h"
+ #include "acl.h"
+@@ -66,6 +67,7 @@ static struct dentry *ext2_lookup(struct
+ 		inode = iget(dir->i_sb, ino);
+ 		if (!inode)
+ 			return ERR_PTR(-EACCES);
++		dx_propagate_tag(nd, inode);
+ 	}
+ 	return d_splice_alias(inode, dentry);
+ }
+@@ -391,6 +393,7 @@ struct inode_operations ext2_dir_inode_o
+ #endif
+ 	.setattr	= ext2_setattr,
+ 	.permission	= ext2_permission,
++	.sync_flags	= ext2_sync_flags,
+ };
+ 
+ struct inode_operations ext2_special_inode_operations = {
+@@ -402,4 +405,5 @@ struct inode_operations ext2_special_ino
+ #endif
+ 	.setattr	= ext2_setattr,
+ 	.permission	= ext2_permission,
++	.sync_flags	= ext2_sync_flags,
+ };
+Index: linux-2.6.20/fs/ext2/super.c
+===================================================================
+--- linux-2.6.20.orig/fs/ext2/super.c
++++ linux-2.6.20/fs/ext2/super.c
+@@ -227,8 +227,8 @@ static int ext2_show_options(struct seq_
+ }
+ 
+ #ifdef CONFIG_QUOTA
+-static ssize_t ext2_quota_read(struct super_block *sb, int type, char *data, size_t len, loff_t off);
+-static ssize_t ext2_quota_write(struct super_block *sb, int type, const char *data, size_t len, loff_t off);
++static ssize_t ext2_quota_read(struct dqhash *hash, int type, char *data, size_t len, loff_t off);
++static ssize_t ext2_quota_write(struct dqhash *hash, int type, const char *data, size_t len, loff_t off);
+ #endif
+ 
+ static struct super_operations ext2_sops = {
+@@ -324,7 +324,7 @@ enum {
+ 	Opt_err_ro, Opt_nouid32, Opt_nocheck, Opt_debug,
+ 	Opt_oldalloc, Opt_orlov, Opt_nobh, Opt_user_xattr, Opt_nouser_xattr,
+ 	Opt_acl, Opt_noacl, Opt_xip, Opt_ignore, Opt_err, Opt_quota,
+-	Opt_usrquota, Opt_grpquota
++	Opt_usrquota, Opt_grpquota, Opt_tag, Opt_notag, Opt_tagid
+ };
+ 
+ static match_table_t tokens = {
+@@ -352,6 +352,10 @@ static match_table_t tokens = {
+ 	{Opt_acl, "acl"},
+ 	{Opt_noacl, "noacl"},
+ 	{Opt_xip, "xip"},
++	{Opt_tag, "tag"},
++	{Opt_notag, "notag"},
++	{Opt_tagid, "tagid=%u"},
++	{Opt_tag, "tagxid"},
+ 	{Opt_grpquota, "grpquota"},
+ 	{Opt_ignore, "noquota"},
+ 	{Opt_quota, "quota"},
+@@ -420,6 +424,20 @@ static int parse_options (char * options
+ 		case Opt_nouid32:
+ 			set_opt (sbi->s_mount_opt, NO_UID32);
+ 			break;
++#ifndef CONFIG_TAGGING_NONE
++		case Opt_tag:
++			set_opt (sbi->s_mount_opt, TAGGED);
++			break;
++		case Opt_notag:
++			clear_opt (sbi->s_mount_opt, TAGGED);
++			break;
++#endif
++#ifdef CONFIG_PROPAGATE
++		case Opt_tagid:
++			/* use args[0] */
++			set_opt (sbi->s_mount_opt, TAGGED);
++			break;
++#endif
+ 		case Opt_nocheck:
+ 			clear_opt (sbi->s_mount_opt, CHECK);
+ 			break;
+@@ -726,6 +744,8 @@ static int ext2_fill_super(struct super_
+ 	if (!parse_options ((char *) data, sbi))
+ 		goto failed_mount;
+ 
++	if (EXT2_SB(sb)->s_mount_opt & EXT2_MOUNT_TAGGED)
++		sb->s_flags |= MS_TAGGED;
+ 	sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
+ 		((EXT2_SB(sb)->s_mount_opt & EXT2_MOUNT_POSIX_ACL) ?
+ 		 MS_POSIXACL : 0);
+@@ -1034,6 +1054,13 @@ static int ext2_remount (struct super_bl
+ 		goto restore_opts;
+ 	}
+ 
++	if ((sbi->s_mount_opt & EXT2_MOUNT_TAGGED) &&
++		!(sb->s_flags & MS_TAGGED)) {
++		printk("EXT2-fs: %s: tagging not permitted on remount.\n",
++		       sb->s_id);
++		return -EINVAL;
++	}
++
+ 	sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
+ 		((sbi->s_mount_opt & EXT2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
+ 
+@@ -1152,10 +1179,11 @@ static int ext2_get_sb(struct file_syste
+  * acquiring the locks... As quota files are never truncated and quota code
+  * itself serializes the operations (and noone else should touch the files)
+  * we don't have to be afraid of races */
+-static ssize_t ext2_quota_read(struct super_block *sb, int type, char *data,
++static ssize_t ext2_quota_read(struct dqhash *hash, int type, char *data,
+ 			       size_t len, loff_t off)
+ {
+-	struct inode *inode = sb_dqopt(sb)->files[type];
++	struct inode *inode = dqh_dqopt(hash)->files[type];
++	struct super_block *sb = hash->dqh_sb;
+ 	sector_t blk = off >> EXT2_BLOCK_SIZE_BITS(sb);
+ 	int err = 0;
+ 	int offset = off & (sb->s_blocksize - 1);
+@@ -1196,10 +1224,11 @@ static ssize_t ext2_quota_read(struct su
+ }
+ 
+ /* Write to quotafile */
+-static ssize_t ext2_quota_write(struct super_block *sb, int type,
++static ssize_t ext2_quota_write(struct dqhash *hash, int type,
+ 				const char *data, size_t len, loff_t off)
+ {
+-	struct inode *inode = sb_dqopt(sb)->files[type];
++	struct inode *inode = dqh_dqopt(hash)->files[type];
++	struct super_block *sb = hash->dqh_sb;
+ 	sector_t blk = off >> EXT2_BLOCK_SIZE_BITS(sb);
+ 	int err = 0;
+ 	int offset = off & (sb->s_blocksize - 1);
+Index: linux-2.6.20/fs/ext2/symlink.c
+===================================================================
+--- linux-2.6.20.orig/fs/ext2/symlink.c
++++ linux-2.6.20/fs/ext2/symlink.c
+@@ -38,6 +38,7 @@ struct inode_operations ext2_symlink_ino
+ 	.listxattr	= ext2_listxattr,
+ 	.removexattr	= generic_removexattr,
+ #endif
++	.sync_flags	= ext2_sync_flags,
+ };
+  
+ struct inode_operations ext2_fast_symlink_inode_operations = {
+@@ -49,4 +50,5 @@ struct inode_operations ext2_fast_symlin
+ 	.listxattr	= ext2_listxattr,
+ 	.removexattr	= generic_removexattr,
+ #endif
++	.sync_flags	= ext2_sync_flags,
+ };
+Index: linux-2.6.20/fs/ext2/xattr.c
+===================================================================
+--- linux-2.6.20.orig/fs/ext2/xattr.c
++++ linux-2.6.20/fs/ext2/xattr.c
+@@ -60,6 +60,7 @@
+ #include <linux/mbcache.h>
+ #include <linux/quotaops.h>
+ #include <linux/rwsem.h>
++#include <linux/vs_dlimit.h>
+ #include "ext2.h"
+ #include "xattr.h"
+ #include "acl.h"
+@@ -641,8 +642,12 @@ ext2_xattr_set2(struct inode *inode, str
+ 				   the inode.  */
+ 				ea_bdebug(new_bh, "reusing block");
+ 
++				error = -ENOSPC;
++				if (DLIMIT_ALLOC_BLOCK(inode, 1))
++					goto cleanup;
+ 				error = -EDQUOT;
+ 				if (DQUOT_ALLOC_BLOCK(inode, 1)) {
++					DLIMIT_FREE_BLOCK(inode, 1);
+ 					unlock_buffer(new_bh);
+ 					goto cleanup;
+ 				}
+@@ -736,6 +741,7 @@ ext2_xattr_set2(struct inode *inode, str
+ 				le32_to_cpu(HDR(old_bh)->h_refcount) - 1);
+ 			if (ce)
+ 				mb_cache_entry_release(ce);
++			DLIMIT_FREE_BLOCK(inode, 1);
+ 			DQUOT_FREE_BLOCK(inode, 1);
+ 			mark_buffer_dirty(old_bh);
+ 			ea_bdebug(old_bh, "refcount now=%d",
+@@ -800,6 +806,7 @@ ext2_xattr_delete_inode(struct inode *in
+ 		mark_buffer_dirty(bh);
+ 		if (IS_SYNC(inode))
+ 			sync_dirty_buffer(bh);
++		DLIMIT_FREE_BLOCK(inode, 1);
+ 		DQUOT_FREE_BLOCK(inode, 1);
+ 	}
+ 	EXT2_I(inode)->i_file_acl = 0;
+Index: linux-2.6.20/fs/ext3/balloc.c
+===================================================================
+--- linux-2.6.20.orig/fs/ext3/balloc.c
++++ linux-2.6.20/fs/ext3/balloc.c
+@@ -19,6 +19,8 @@
+ #include <linux/ext3_jbd.h>
+ #include <linux/quotaops.h>
+ #include <linux/buffer_head.h>
++#include <linux/vs_dlimit.h>
++#include <linux/vs_tag.h>
+ 
+ /*
+  * balloc.c contains the blocks allocation and deallocation routines
+@@ -613,8 +615,10 @@ void ext3_free_blocks(handle_t *handle, 
+ 		return;
+ 	}
+ 	ext3_free_blocks_sb(handle, sb, block, count, &dquot_freed_blocks);
+-	if (dquot_freed_blocks)
++	if (dquot_freed_blocks) {
++		DLIMIT_FREE_BLOCK(inode, dquot_freed_blocks);
+ 		DQUOT_FREE_BLOCK(inode, dquot_freed_blocks);
++	}
+ 	return;
+ }
+ 
+@@ -1353,18 +1357,33 @@ out:
+  *
+  * Check if filesystem has at least 1 free block available for allocation.
+  */
+-static int ext3_has_free_blocks(struct ext3_sb_info *sbi)
++static int ext3_has_free_blocks(struct super_block *sb)
+ {
+-	ext3_fsblk_t free_blocks, root_blocks;
++	struct ext3_sb_info *sbi = EXT3_SB(sb);
++	unsigned long long free_blocks, root_blocks;
++	int cond;
+ 
+ 	free_blocks = percpu_counter_read_positive(&sbi->s_freeblocks_counter);
+ 	root_blocks = le32_to_cpu(sbi->s_es->s_r_blocks_count);
+-	if (free_blocks < root_blocks + 1 && !capable(CAP_SYS_RESOURCE) &&
++
++	vxdprintk(VXD_CBIT(dlim, 3),
++		"ext3_has_free_blocks(%p): free=%llu, root=%llu",
++		sb, free_blocks, root_blocks);
++
++	DLIMIT_ADJUST_BLOCK(sb, dx_current_tag(), &free_blocks, &root_blocks);
++
++	cond = (free_blocks < root_blocks + 1 &&
++		!capable(CAP_SYS_RESOURCE) &&
+ 		sbi->s_resuid != current->fsuid &&
+-		(sbi->s_resgid == 0 || !in_group_p (sbi->s_resgid))) {
+-		return 0;
+-	}
+-	return 1;
++		(sbi->s_resgid == 0 || !in_group_p (sbi->s_resgid)));
++
++	vxdprintk(VXD_CBIT(dlim, 3),
++		"ext3_has_free_blocks(%p): %llu<%llu+1, %c, %u!=%u r=%d",
++		sb, free_blocks, root_blocks,
++		!capable(CAP_SYS_RESOURCE)?'1':'0',
++		sbi->s_resuid, current->fsuid, cond?0:1);
++
++	return (cond ? 0 : 1);
+ }
+ 
+ /**
+@@ -1381,7 +1400,7 @@ static int ext3_has_free_blocks(struct e
+  */
+ int ext3_should_retry_alloc(struct super_block *sb, int *retries)
+ {
+-	if (!ext3_has_free_blocks(EXT3_SB(sb)) || (*retries)++ > 3)
++	if (!ext3_has_free_blocks(sb) || (*retries)++ > 3)
+ 		return 0;
+ 
+ 	jbd_debug(1, "%s: retrying operation after ENOSPC\n", sb->s_id);
+@@ -1444,6 +1463,8 @@ ext3_fsblk_t ext3_new_blocks(handle_t *h
+ 		*errp = -EDQUOT;
+ 		return 0;
+ 	}
++	if (DLIMIT_ALLOC_BLOCK(inode, 1))
++	    goto out_dlimit;
+ 
+ 	sbi = EXT3_SB(sb);
+ 	es = EXT3_SB(sb)->s_es;
+@@ -1460,7 +1481,7 @@ ext3_fsblk_t ext3_new_blocks(handle_t *h
+ 	if (block_i && ((windowsz = block_i->rsv_window_node.rsv_goal_size) > 0))
+ 		my_rsv = &block_i->rsv_window_node;
+ 
+-	if (!ext3_has_free_blocks(sbi)) {
++	if (!ext3_has_free_blocks(sb)) {
+ 		*errp = -ENOSPC;
+ 		goto out;
+ 	}
+@@ -1653,6 +1674,9 @@ allocated:
+ io_error:
+ 	*errp = -EIO;
+ out:
++	if (!performed_allocation)
++		DLIMIT_FREE_BLOCK(inode, 1);
++out_dlimit:
+ 	if (fatal) {
+ 		*errp = fatal;
+ 		ext3_std_error(sb, fatal);
+Index: linux-2.6.20/fs/ext3/file.c
+===================================================================
+--- linux-2.6.20.orig/fs/ext3/file.c
++++ linux-2.6.20/fs/ext3/file.c
+@@ -121,6 +121,7 @@ const struct file_operations ext3_file_o
+ 	.release	= ext3_release_file,
+ 	.fsync		= ext3_sync_file,
+ 	.sendfile	= generic_file_sendfile,
++	.sendpage	= generic_file_sendpage,
+ 	.splice_read	= generic_file_splice_read,
+ 	.splice_write	= generic_file_splice_write,
+ };
+@@ -135,5 +136,6 @@ struct inode_operations ext3_file_inode_
+ 	.removexattr	= generic_removexattr,
+ #endif
+ 	.permission	= ext3_permission,
++	.sync_flags	= ext3_sync_flags,
+ };
+ 
+Index: linux-2.6.20/fs/ext3/ialloc.c
+===================================================================
+--- linux-2.6.20.orig/fs/ext3/ialloc.c
++++ linux-2.6.20/fs/ext3/ialloc.c
+@@ -23,6 +23,8 @@
+ #include <linux/buffer_head.h>
+ #include <linux/random.h>
+ #include <linux/bitops.h>
++#include <linux/vs_dlimit.h>
++#include <linux/vs_tag.h>
+ 
+ #include <asm/byteorder.h>
+ 
+@@ -127,6 +129,7 @@ void ext3_free_inode (handle_t *handle, 
+ 	ext3_xattr_delete_inode(handle, inode);
+ 	DQUOT_FREE_INODE(inode);
+ 	DQUOT_DROP(inode);
++	DLIMIT_FREE_INODE(inode);
+ 
+ 	is_directory = S_ISDIR(inode->i_mode);
+ 
+@@ -445,6 +448,12 @@ struct inode *ext3_new_inode(handle_t *h
+ 	inode = new_inode(sb);
+ 	if (!inode)
+ 		return ERR_PTR(-ENOMEM);
++
++	inode->i_tag = dx_current_fstag(sb);
++	if (DLIMIT_ALLOC_INODE(inode)) {
++		err = -ENOSPC;
++		goto out_dlimit;
++	}
+ 	ei = EXT3_I(inode);
+ 
+ 	sbi = EXT3_SB(sb);
+@@ -566,7 +575,8 @@ got:
+ 	ei->i_dir_start_lookup = 0;
+ 	ei->i_disksize = 0;
+ 
+-	ei->i_flags = EXT3_I(dir)->i_flags & ~EXT3_INDEX_FL;
++	ei->i_flags = EXT3_I(dir)->i_flags &
++		~(EXT3_INDEX_FL|EXT3_IUNLINK_FL|EXT3_BARRIER_FL);
+ 	if (S_ISLNK(mode))
+ 		ei->i_flags &= ~(EXT3_IMMUTABLE_FL|EXT3_APPEND_FL);
+ 	/* dirsync only applies to directories */
+@@ -621,6 +631,8 @@ got:
+ fail:
+ 	ext3_std_error(sb, err);
+ out:
++	DLIMIT_FREE_INODE(inode);
++out_dlimit:
+ 	iput(inode);
+ 	ret = ERR_PTR(err);
+ really_out:
+@@ -632,6 +644,7 @@ fail_free_drop:
+ 
+ fail_drop:
+ 	DQUOT_DROP(inode);
++	DLIMIT_FREE_INODE(inode);
+ 	inode->i_flags |= S_NOQUOTA;
+ 	inode->i_nlink = 0;
+ 	iput(inode);
+Index: linux-2.6.20/fs/ext3/inode.c
+===================================================================
+--- linux-2.6.20.orig/fs/ext3/inode.c
++++ linux-2.6.20/fs/ext3/inode.c
+@@ -37,6 +37,7 @@
+ #include <linux/mpage.h>
+ #include <linux/uio.h>
+ #include <linux/bio.h>
++#include <linux/vs_tag.h>
+ #include "xattr.h"
+ #include "acl.h"
+ 
+@@ -2311,7 +2312,7 @@ void ext3_truncate(struct inode *inode)
+ 		return;
+ 	if (ext3_inode_is_fast_symlink(inode))
+ 		return;
+-	if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
++	if (IS_APPEND(inode) || IS_IXORUNLINK(inode))
+ 		return;
+ 
+ 	/*
+@@ -2633,19 +2634,65 @@ void ext3_set_inode_flags(struct inode *
+ {
+ 	unsigned int flags = EXT3_I(inode)->i_flags;
+ 
+-	inode->i_flags &= ~(S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC);
++	inode->i_flags &= ~(S_IMMUTABLE | S_IUNLINK | S_BARRIER |
++		S_SYNC | S_APPEND | S_NOATIME | S_DIRSYNC);
++
++	if (flags & EXT3_IMMUTABLE_FL)
++		inode->i_flags |= S_IMMUTABLE;
++	if (flags & EXT3_IUNLINK_FL)
++		inode->i_flags |= S_IUNLINK;
++	if (flags & EXT3_BARRIER_FL)
++		inode->i_flags |= S_BARRIER;
++
+ 	if (flags & EXT3_SYNC_FL)
+ 		inode->i_flags |= S_SYNC;
+ 	if (flags & EXT3_APPEND_FL)
+ 		inode->i_flags |= S_APPEND;
+-	if (flags & EXT3_IMMUTABLE_FL)
+-		inode->i_flags |= S_IMMUTABLE;
+ 	if (flags & EXT3_NOATIME_FL)
+ 		inode->i_flags |= S_NOATIME;
+ 	if (flags & EXT3_DIRSYNC_FL)
+ 		inode->i_flags |= S_DIRSYNC;
+ }
+ 
++int ext3_sync_flags(struct inode *inode)
++{
++	unsigned int oldflags, newflags;
++	int err = 0;
++
++	oldflags = EXT3_I(inode)->i_flags;
++	newflags = oldflags & ~(EXT3_IMMUTABLE_FL |
++		EXT3_IUNLINK_FL | EXT3_BARRIER_FL);
++
++	if (IS_IMMUTABLE(inode))
++		newflags |= EXT3_IMMUTABLE_FL;
++	if (IS_IUNLINK(inode))
++		newflags |= EXT3_IUNLINK_FL;
++	if (IS_BARRIER(inode))
++		newflags |= EXT3_BARRIER_FL;
++
++	if (oldflags ^ newflags) {
++		handle_t *handle;
++		struct ext3_iloc iloc;
++
++		handle = ext3_journal_start(inode, 1);
++		if (IS_ERR(handle))
++			return PTR_ERR(handle);
++		if (IS_SYNC(inode))
++			handle->h_sync = 1;
++		err = ext3_reserve_inode_write(handle, inode, &iloc);
++		if (err)
++			goto flags_err;
++
++		EXT3_I(inode)->i_flags = newflags;
++		inode->i_ctime = CURRENT_TIME;
++
++		err = ext3_mark_iloc_dirty(handle, inode, &iloc);
++	flags_err:
++		ext3_journal_stop(handle);
++	}
++	return err;
++}
++
+ void ext3_read_inode(struct inode * inode)
+ {
+ 	struct ext3_iloc iloc;
+@@ -2653,6 +2700,8 @@ void ext3_read_inode(struct inode * inod
+ 	struct ext3_inode_info *ei = EXT3_I(inode);
+ 	struct buffer_head *bh;
+ 	int block;
++	uid_t uid;
++	gid_t gid;
+ 
+ #ifdef CONFIG_EXT3_FS_POSIX_ACL
+ 	ei->i_acl = EXT3_ACL_NOT_CACHED;
+@@ -2665,12 +2714,17 @@ void ext3_read_inode(struct inode * inod
+ 	bh = iloc.bh;
+ 	raw_inode = ext3_raw_inode(&iloc);
+ 	inode->i_mode = le16_to_cpu(raw_inode->i_mode);
+-	inode->i_uid = (uid_t)le16_to_cpu(raw_inode->i_uid_low);
+-	inode->i_gid = (gid_t)le16_to_cpu(raw_inode->i_gid_low);
++	uid = (uid_t)le16_to_cpu(raw_inode->i_uid_low);
++	gid = (gid_t)le16_to_cpu(raw_inode->i_gid_low);
+ 	if(!(test_opt (inode->i_sb, NO_UID32))) {
+-		inode->i_uid |= le16_to_cpu(raw_inode->i_uid_high) << 16;
+-		inode->i_gid |= le16_to_cpu(raw_inode->i_gid_high) << 16;
++		uid |= le16_to_cpu(raw_inode->i_uid_high) << 16;
++		gid |= le16_to_cpu(raw_inode->i_gid_high) << 16;
+ 	}
++	inode->i_uid = INOTAG_UID(DX_TAG(inode), uid, gid);
++	inode->i_gid = INOTAG_GID(DX_TAG(inode), uid, gid);
++	inode->i_tag = INOTAG_TAG(DX_TAG(inode), uid, gid,
++		le16_to_cpu(raw_inode->i_raw_tag));
++
+ 	inode->i_nlink = le16_to_cpu(raw_inode->i_links_count);
+ 	inode->i_size = le32_to_cpu(raw_inode->i_size);
+ 	inode->i_atime.tv_sec = le32_to_cpu(raw_inode->i_atime);
+@@ -2794,6 +2848,8 @@ static int ext3_do_update_inode(handle_t
+ 	struct ext3_inode *raw_inode = ext3_raw_inode(iloc);
+ 	struct ext3_inode_info *ei = EXT3_I(inode);
+ 	struct buffer_head *bh = iloc->bh;
++	uid_t uid = TAGINO_UID(DX_TAG(inode), inode->i_uid, inode->i_tag);
++	gid_t gid = TAGINO_GID(DX_TAG(inode), inode->i_gid, inode->i_tag);
+ 	int err = 0, rc, block;
+ 
+ 	/* For fields not not tracking in the in-memory inode,
+@@ -2803,29 +2859,32 @@ static int ext3_do_update_inode(handle_t
+ 
+ 	raw_inode->i_mode = cpu_to_le16(inode->i_mode);
+ 	if(!(test_opt(inode->i_sb, NO_UID32))) {
+-		raw_inode->i_uid_low = cpu_to_le16(low_16_bits(inode->i_uid));
+-		raw_inode->i_gid_low = cpu_to_le16(low_16_bits(inode->i_gid));
++		raw_inode->i_uid_low = cpu_to_le16(low_16_bits(uid));
++		raw_inode->i_gid_low = cpu_to_le16(low_16_bits(gid));
+ /*
+  * Fix up interoperability with old kernels. Otherwise, old inodes get
+  * re-used with the upper 16 bits of the uid/gid intact
+  */
+ 		if(!ei->i_dtime) {
+ 			raw_inode->i_uid_high =
+-				cpu_to_le16(high_16_bits(inode->i_uid));
++				cpu_to_le16(high_16_bits(uid));
+ 			raw_inode->i_gid_high =
+-				cpu_to_le16(high_16_bits(inode->i_gid));
++				cpu_to_le16(high_16_bits(gid));
+ 		} else {
+ 			raw_inode->i_uid_high = 0;
+ 			raw_inode->i_gid_high = 0;
+ 		}
+ 	} else {
+ 		raw_inode->i_uid_low =
+-			cpu_to_le16(fs_high2lowuid(inode->i_uid));
++			cpu_to_le16(fs_high2lowuid(uid));
+ 		raw_inode->i_gid_low =
+-			cpu_to_le16(fs_high2lowgid(inode->i_gid));
++			cpu_to_le16(fs_high2lowgid(gid));
+ 		raw_inode->i_uid_high = 0;
+ 		raw_inode->i_gid_high = 0;
+ 	}
++#ifdef CONFIG_TAGGING_INTERN
++	raw_inode->i_raw_tag = cpu_to_le16(inode->i_tag);
++#endif
+ 	raw_inode->i_links_count = cpu_to_le16(inode->i_nlink);
+ 	raw_inode->i_size = cpu_to_le32(ei->i_disksize);
+ 	raw_inode->i_atime = cpu_to_le32(inode->i_atime.tv_sec);
+@@ -2978,7 +3037,8 @@ int ext3_setattr(struct dentry *dentry, 
+ 		return error;
+ 
+ 	if ((ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid) ||
+-		(ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid)) {
++		(ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid) ||
++		(ia_valid & ATTR_TAG && attr->ia_tag != inode->i_tag)) {
+ 		handle_t *handle;
+ 
+ 		/* (user+group)*(old+new) structure, inode write (sb,
+@@ -3000,6 +3060,8 @@ int ext3_setattr(struct dentry *dentry, 
+ 			inode->i_uid = attr->ia_uid;
+ 		if (attr->ia_valid & ATTR_GID)
+ 			inode->i_gid = attr->ia_gid;
++		if ((attr->ia_valid & ATTR_TAG) && IS_TAGGED(inode))
++			inode->i_tag = attr->ia_tag;
+ 		error = ext3_mark_inode_dirty(handle, inode);
+ 		ext3_journal_stop(handle);
+ 	}
+Index: linux-2.6.20/fs/ext3/ioctl.c
+===================================================================
+--- linux-2.6.20.orig/fs/ext3/ioctl.c
++++ linux-2.6.20/fs/ext3/ioctl.c
+@@ -8,6 +8,7 @@
+  */
+ 
+ #include <linux/fs.h>
++#include <linux/mount.h>
+ #include <linux/jbd.h>
+ #include <linux/capability.h>
+ #include <linux/ext3_fs.h>
+@@ -15,6 +16,7 @@
+ #include <linux/time.h>
+ #include <linux/compat.h>
+ #include <linux/smp_lock.h>
++#include <linux/vs_tag.h>
+ #include <asm/uaccess.h>
+ 
+ int ext3_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,
+@@ -37,7 +39,8 @@ int ext3_ioctl (struct inode * inode, st
+ 		unsigned int oldflags;
+ 		unsigned int jflag;
+ 
+-		if (IS_RDONLY(inode))
++		if (IS_RDONLY(inode) ||
++			(filp && MNT_IS_RDONLY(filp->f_vfsmnt)))
+ 			return -EROFS;
+ 
+ 		if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+@@ -61,7 +64,9 @@ int ext3_ioctl (struct inode * inode, st
+ 		 *
+ 		 * This test looks nicer. Thanks to Pauline Middelink
+ 		 */
+-		if ((flags ^ oldflags) & (EXT3_APPEND_FL | EXT3_IMMUTABLE_FL)) {
++		if ((oldflags & EXT3_IMMUTABLE_FL) ||
++			((flags ^ oldflags) & (EXT3_APPEND_FL |
++			EXT3_IMMUTABLE_FL | EXT3_IUNLINK_FL))) {
+ 			if (!capable(CAP_LINUX_IMMUTABLE)) {
+ 				mutex_unlock(&inode->i_mutex);
+ 				return -EPERM;
+@@ -123,7 +128,8 @@ flags_err:
+ 
+ 		if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+ 			return -EPERM;
+-		if (IS_RDONLY(inode))
++		if (IS_RDONLY(inode) ||
++			(filp && MNT_IS_RDONLY(filp->f_vfsmnt)))
+ 			return -EROFS;
+ 		if (get_user(generation, (int __user *) arg))
+ 			return -EFAULT;
+@@ -177,7 +183,8 @@ flags_err:
+ 		if (!test_opt(inode->i_sb, RESERVATION) ||!S_ISREG(inode->i_mode))
+ 			return -ENOTTY;
+ 
+-		if (IS_RDONLY(inode))
++		if (IS_RDONLY(inode) ||
++			(filp && MNT_IS_RDONLY(filp->f_vfsmnt)))
+ 			return -EROFS;
+ 
+ 		if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+@@ -212,7 +219,8 @@ flags_err:
+ 		if (!capable(CAP_SYS_RESOURCE))
+ 			return -EPERM;
+ 
+-		if (IS_RDONLY(inode))
++		if (IS_RDONLY(inode) ||
++			(filp && MNT_IS_RDONLY(filp->f_vfsmnt)))
+ 			return -EROFS;
+ 
+ 		if (get_user(n_blocks_count, (__u32 __user *)arg))
+@@ -233,7 +241,8 @@ flags_err:
+ 		if (!capable(CAP_SYS_RESOURCE))
+ 			return -EPERM;
+ 
+-		if (IS_RDONLY(inode))
++		if (IS_RDONLY(inode) ||
++			(filp && MNT_IS_RDONLY(filp->f_vfsmnt)))
+ 			return -EROFS;
+ 
+ 		if (copy_from_user(&input, (struct ext3_new_group_input __user *)arg,
+@@ -247,8 +256,6 @@ flags_err:
+ 
+ 		return err;
+ 	}
+-
+-
+ 	default:
+ 		return -ENOTTY;
+ 	}
+Index: linux-2.6.20/fs/ext3/namei.c
+===================================================================
+--- linux-2.6.20.orig/fs/ext3/namei.c
++++ linux-2.6.20/fs/ext3/namei.c
+@@ -37,6 +37,7 @@
+ #include <linux/buffer_head.h>
+ #include <linux/bio.h>
+ #include <linux/smp_lock.h>
++#include <linux/vs_tag.h>
+ 
+ #include "namei.h"
+ #include "xattr.h"
+@@ -1019,6 +1020,7 @@ static struct dentry *ext3_lookup(struct
+ 
+ 		if (!inode)
+ 			return ERR_PTR(-EACCES);
++		dx_propagate_tag(nd, inode);
+ 	}
+ 	return d_splice_alias(inode, dentry);
+ }
+@@ -2392,6 +2394,7 @@ struct inode_operations ext3_dir_inode_o
+ 	.removexattr	= generic_removexattr,
+ #endif
+ 	.permission	= ext3_permission,
++	.sync_flags	= ext3_sync_flags,
+ };
+ 
+ struct inode_operations ext3_special_inode_operations = {
+@@ -2403,4 +2406,5 @@ struct inode_operations ext3_special_ino
+ 	.removexattr	= generic_removexattr,
+ #endif
+ 	.permission	= ext3_permission,
++	.sync_flags	= ext3_sync_flags,
+ };
+Index: linux-2.6.20/fs/ext3/super.c
+===================================================================
+--- linux-2.6.20.orig/fs/ext3/super.c
++++ linux-2.6.20/fs/ext3/super.c
+@@ -605,12 +605,12 @@ static int ext3_write_dquot(struct dquot
+ static int ext3_acquire_dquot(struct dquot *dquot);
+ static int ext3_release_dquot(struct dquot *dquot);
+ static int ext3_mark_dquot_dirty(struct dquot *dquot);
+-static int ext3_write_info(struct super_block *sb, int type);
+-static int ext3_quota_on(struct super_block *sb, int type, int format_id, char *path);
+-static int ext3_quota_on_mount(struct super_block *sb, int type);
+-static ssize_t ext3_quota_read(struct super_block *sb, int type, char *data,
++static int ext3_write_info(struct dqhash *hash, int type);
++static int ext3_quota_on(struct dqhash *hash, int type, int format_id, char *path);
++static int ext3_quota_on_mount(struct dqhash *hash, int type);
++static ssize_t ext3_quota_read(struct dqhash *hash, int type, char *data,
+ 			       size_t len, loff_t off);
+-static ssize_t ext3_quota_write(struct super_block *sb, int type,
++static ssize_t ext3_quota_write(struct dqhash *hash, int type,
+ 				const char *data, size_t len, loff_t off);
+ 
+ static struct dquot_operations ext3_quota_operations = {
+@@ -677,7 +677,7 @@ enum {
+ 	Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota,
+ 	Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota,
+ 	Opt_ignore, Opt_barrier, Opt_err, Opt_resize, Opt_usrquota,
+-	Opt_grpquota
++	Opt_grpquota, Opt_tag, Opt_notag, Opt_tagid
+ };
+ 
+ static match_table_t tokens = {
+@@ -727,6 +727,10 @@ static match_table_t tokens = {
+ 	{Opt_quota, "quota"},
+ 	{Opt_usrquota, "usrquota"},
+ 	{Opt_barrier, "barrier=%u"},
++	{Opt_tag, "tag"},
++	{Opt_notag, "notag"},
++	{Opt_tagid, "tagid=%u"},
++	{Opt_tag, "tagxid"},
+ 	{Opt_err, NULL},
+ 	{Opt_resize, "resize"},
+ };
+@@ -820,6 +824,20 @@ static int parse_options (char *options,
+ 		case Opt_nouid32:
+ 			set_opt (sbi->s_mount_opt, NO_UID32);
+ 			break;
++#ifndef CONFIG_TAGGING_NONE
++		case Opt_tag:
++			set_opt (sbi->s_mount_opt, TAGGED);
++			break;
++		case Opt_notag:
++			clear_opt (sbi->s_mount_opt, TAGGED);
++			break;
++#endif
++#ifdef CONFIG_PROPAGATE
++		case Opt_tagid:
++			/* use args[0] */
++			set_opt (sbi->s_mount_opt, TAGGED);
++			break;
++#endif
+ 		case Opt_nocheck:
+ 			clear_opt (sbi->s_mount_opt, CHECK);
+ 			break;
+@@ -938,7 +956,7 @@ static int parse_options (char *options,
+ 		case Opt_grpjquota:
+ 			qtype = GRPQUOTA;
+ set_qf_name:
+-			if (sb_any_quota_enabled(sb)) {
++			if (dqh_any_quota_enabled(sb->s_dqh)) {
+ 				printk(KERN_ERR
+ 					"EXT3-fs: Cannot change journalled "
+ 					"quota options when quota turned on.\n");
+@@ -976,7 +994,7 @@ set_qf_name:
+ 		case Opt_offgrpjquota:
+ 			qtype = GRPQUOTA;
+ clear_qf_name:
+-			if (sb_any_quota_enabled(sb)) {
++			if (dqh_any_quota_enabled(sb->s_dqh)) {
+ 				printk(KERN_ERR "EXT3-fs: Cannot change "
+ 					"journalled quota options when "
+ 					"quota turned on.\n");
+@@ -1004,7 +1022,7 @@ clear_qf_name:
+ 			set_opt(sbi->s_mount_opt, GRPQUOTA);
+ 			break;
+ 		case Opt_noquota:
+-			if (sb_any_quota_enabled(sb)) {
++			if (dqh_any_quota_enabled(sb->s_dqh)) {
+ 				printk(KERN_ERR "EXT3-fs: Cannot change quota "
+ 					"options when quota turned on.\n");
+ 				return 0;
+@@ -1290,7 +1308,7 @@ static void ext3_orphan_cleanup (struct 
+ 	/* Turn on quotas so that they are updated correctly */
+ 	for (i = 0; i < MAXQUOTAS; i++) {
+ 		if (EXT3_SB(sb)->s_qf_names[i]) {
+-			int ret = ext3_quota_on_mount(sb, i);
++			int ret = ext3_quota_on_mount(sb->s_dqh, i);
+ 			if (ret < 0)
+ 				printk(KERN_ERR
+ 					"EXT3-fs: Cannot turn on journalled "
+@@ -1340,8 +1358,8 @@ static void ext3_orphan_cleanup (struct 
+ #ifdef CONFIG_QUOTA
+ 	/* Turn quotas off */
+ 	for (i = 0; i < MAXQUOTAS; i++) {
+-		if (sb_dqopt(sb)->files[i])
+-			vfs_quota_off(sb, i);
++		if (dqh_dqopt(sb->s_dqh)->files[i])
++			vfs_quota_off(sb->s_dqh, i);
+ 	}
+ #endif
+ 	sb->s_flags = s_flags; /* Restore MS_RDONLY status */
+@@ -1486,6 +1504,9 @@ static int ext3_fill_super (struct super
+ 			    NULL, 0))
+ 		goto failed_mount;
+ 
++	if (EXT3_SB(sb)->s_mount_opt & EXT3_MOUNT_TAGGED)
++		sb->s_flags |= MS_TAGGED;
++
+ 	sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
+ 		((sbi->s_mount_opt & EXT3_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
+ 
+@@ -1691,8 +1712,8 @@ static int ext3_fill_super (struct super
+ 	sb->s_export_op = &ext3_export_ops;
+ 	sb->s_xattr = ext3_xattr_handlers;
+ #ifdef CONFIG_QUOTA
+-	sb->s_qcop = &ext3_qctl_operations;
+-	sb->dq_op = &ext3_quota_operations;
++	sb->s_dqh->dqh_qop = &ext3_quota_operations;
++	sb->s_dqh->dqh_qcop = &ext3_qctl_operations;
+ #endif
+ 	INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */
+ 
+@@ -2301,6 +2322,12 @@ static int ext3_remount (struct super_bl
+ 
+ 	if (sbi->s_mount_opt & EXT3_MOUNT_ABORT)
+ 		ext3_abort(sb, __FUNCTION__, "Abort forced by user");
++	if ((sbi->s_mount_opt & EXT3_MOUNT_TAGGED) &&
++		!(sb->s_flags & MS_TAGGED)) {
++		printk("EXT3-fs: %s: tagging not permitted on remount.\n",
++			sb->s_id);
++		return -EINVAL;
++	}
+ 
+ 	sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
+ 		((sbi->s_mount_opt & EXT3_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
+@@ -2459,7 +2486,7 @@ static int ext3_statfs (struct dentry * 
+ 
+ static inline struct inode *dquot_to_inode(struct dquot *dquot)
+ {
+-	return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type];
++	return dqh_dqopt(dquot->dq_dqh)->files[dquot->dq_type];
+ }
+ 
+ static int ext3_dquot_initialize(struct inode *inode, int type)
+@@ -2502,7 +2529,7 @@ static int ext3_write_dquot(struct dquot
+ 
+ 	inode = dquot_to_inode(dquot);
+ 	handle = ext3_journal_start(inode,
+-					EXT3_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
++		EXT3_QUOTA_TRANS_BLOCKS(dquot->dq_dqh->dqh_sb));
+ 	if (IS_ERR(handle))
+ 		return PTR_ERR(handle);
+ 	ret = dquot_commit(dquot);
+@@ -2518,7 +2545,7 @@ static int ext3_acquire_dquot(struct dqu
+ 	handle_t *handle;
+ 
+ 	handle = ext3_journal_start(dquot_to_inode(dquot),
+-					EXT3_QUOTA_INIT_BLOCKS(dquot->dq_sb));
++		EXT3_QUOTA_INIT_BLOCKS(dquot->dq_dqh->dqh_sb));
+ 	if (IS_ERR(handle))
+ 		return PTR_ERR(handle);
+ 	ret = dquot_acquire(dquot);
+@@ -2534,7 +2561,7 @@ static int ext3_release_dquot(struct dqu
+ 	handle_t *handle;
+ 
+ 	handle = ext3_journal_start(dquot_to_inode(dquot),
+-					EXT3_QUOTA_DEL_BLOCKS(dquot->dq_sb));
++		EXT3_QUOTA_DEL_BLOCKS(dquot->dq_dqh->dqh_sb));
+ 	if (IS_ERR(handle))
+ 		return PTR_ERR(handle);
+ 	ret = dquot_release(dquot);
+@@ -2547,8 +2574,8 @@ static int ext3_release_dquot(struct dqu
+ static int ext3_mark_dquot_dirty(struct dquot *dquot)
+ {
+ 	/* Are we journalling quotas? */
+-	if (EXT3_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
+-	    EXT3_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
++	if (EXT3_SB(dquot->dq_dqh->dqh_sb)->s_qf_names[USRQUOTA] ||
++	    EXT3_SB(dquot->dq_dqh->dqh_sb)->s_qf_names[GRPQUOTA]) {
+ 		dquot_mark_dquot_dirty(dquot);
+ 		return ext3_write_dquot(dquot);
+ 	} else {
+@@ -2556,8 +2583,9 @@ static int ext3_mark_dquot_dirty(struct 
+ 	}
+ }
+ 
+-static int ext3_write_info(struct super_block *sb, int type)
++static int ext3_write_info(struct dqhash *hash, int type)
+ {
++	struct super_block *sb = hash->dqh_sb;
+ 	int ret, err;
+ 	handle_t *handle;
+ 
+@@ -2565,7 +2593,7 @@ static int ext3_write_info(struct super_
+ 	handle = ext3_journal_start(sb->s_root->d_inode, 2);
+ 	if (IS_ERR(handle))
+ 		return PTR_ERR(handle);
+-	ret = dquot_commit_info(sb, type);
++	ret = dquot_commit_info(hash, type);
+ 	err = ext3_journal_stop(handle);
+ 	if (!ret)
+ 		ret = err;
+@@ -2576,18 +2604,20 @@ static int ext3_write_info(struct super_
+  * Turn on quotas during mount time - we need to find
+  * the quota file and such...
+  */
+-static int ext3_quota_on_mount(struct super_block *sb, int type)
++static int ext3_quota_on_mount(struct dqhash *hash, int type)
+ {
+-	return vfs_quota_on_mount(sb, EXT3_SB(sb)->s_qf_names[type],
+-			EXT3_SB(sb)->s_jquota_fmt, type);
++	return vfs_quota_on_mount(hash,
++		EXT3_SB(hash->dqh_sb)->s_qf_names[type],
++		EXT3_SB(hash->dqh_sb)->s_jquota_fmt, type);
+ }
+ 
+ /*
+  * Standard function to be called on quota_on
+  */
+-static int ext3_quota_on(struct super_block *sb, int type, int format_id,
++static int ext3_quota_on(struct dqhash *hash, int type, int format_id,
+ 			 char *path)
+ {
++	struct super_block *sb = hash->dqh_sb;
+ 	int err;
+ 	struct nameidata nd;
+ 
+@@ -2596,7 +2626,7 @@ static int ext3_quota_on(struct super_bl
+ 	/* Not journalling quota? */
+ 	if (!EXT3_SB(sb)->s_qf_names[USRQUOTA] &&
+ 	    !EXT3_SB(sb)->s_qf_names[GRPQUOTA])
+-		return vfs_quota_on(sb, type, format_id, path);
++		return vfs_quota_on(hash, type, format_id, path);
+ 	err = path_lookup(path, LOOKUP_FOLLOW, &nd);
+ 	if (err)
+ 		return err;
+@@ -2611,17 +2641,18 @@ static int ext3_quota_on(struct super_bl
+ 			"EXT3-fs: Quota file not on filesystem root. "
+ 			"Journalled quota will not work.\n");
+ 	path_release(&nd);
+-	return vfs_quota_on(sb, type, format_id, path);
++	return vfs_quota_on(hash, type, format_id, path);
+ }
+ 
+ /* Read data from quotafile - avoid pagecache and such because we cannot afford
+  * acquiring the locks... As quota files are never truncated and quota code
+  * itself serializes the operations (and noone else should touch the files)
+  * we don't have to be afraid of races */
+-static ssize_t ext3_quota_read(struct super_block *sb, int type, char *data,
++static ssize_t ext3_quota_read(struct dqhash *hash, int type, char *data,
+ 			       size_t len, loff_t off)
+ {
+-	struct inode *inode = sb_dqopt(sb)->files[type];
++	struct inode *inode = dqh_dqopt(hash)->files[type];
++	struct super_block *sb = hash->dqh_sb;
+ 	sector_t blk = off >> EXT3_BLOCK_SIZE_BITS(sb);
+ 	int err = 0;
+ 	int offset = off & (sb->s_blocksize - 1);
+@@ -2656,10 +2687,11 @@ static ssize_t ext3_quota_read(struct su
+ 
+ /* Write to quotafile (we know the transaction is already started and has
+  * enough credits) */
+-static ssize_t ext3_quota_write(struct super_block *sb, int type,
++static ssize_t ext3_quota_write(struct dqhash *hash, int type,
+ 				const char *data, size_t len, loff_t off)
+ {
+-	struct inode *inode = sb_dqopt(sb)->files[type];
++	struct inode *inode = dqh_dqopt(hash)->files[type];
++	struct super_block *sb = hash->dqh_sb;
+ 	sector_t blk = off >> EXT3_BLOCK_SIZE_BITS(sb);
+ 	int err = 0;
+ 	int offset = off & (sb->s_blocksize - 1);
+Index: linux-2.6.20/fs/ext3/symlink.c
+===================================================================
+--- linux-2.6.20.orig/fs/ext3/symlink.c
++++ linux-2.6.20/fs/ext3/symlink.c
+@@ -40,6 +40,7 @@ struct inode_operations ext3_symlink_ino
+ 	.listxattr	= ext3_listxattr,
+ 	.removexattr	= generic_removexattr,
+ #endif
++	.sync_flags	= ext3_sync_flags,
+ };
+ 
+ struct inode_operations ext3_fast_symlink_inode_operations = {
+@@ -51,4 +52,5 @@ struct inode_operations ext3_fast_symlin
+ 	.listxattr	= ext3_listxattr,
+ 	.removexattr	= generic_removexattr,
+ #endif
++	.sync_flags	= ext3_sync_flags,
+ };
+Index: linux-2.6.20/fs/ext3/xattr.c
+===================================================================
+--- linux-2.6.20.orig/fs/ext3/xattr.c
++++ linux-2.6.20/fs/ext3/xattr.c
+@@ -58,6 +58,7 @@
+ #include <linux/mbcache.h>
+ #include <linux/quotaops.h>
+ #include <linux/rwsem.h>
++#include <linux/vs_dlimit.h>
+ #include "xattr.h"
+ #include "acl.h"
+ 
+@@ -492,6 +493,7 @@ ext3_xattr_release_block(handle_t *handl
+ 			ext3_journal_dirty_metadata(handle, bh);
+ 			if (IS_SYNC(inode))
+ 				handle->h_sync = 1;
++			DLIMIT_FREE_BLOCK(inode, 1);
+ 			DQUOT_FREE_BLOCK(inode, 1);
+ 			unlock_buffer(bh);
+ 			ea_bdebug(bh, "refcount now=%d; releasing",
+@@ -760,11 +762,14 @@ inserted:
+ 			if (new_bh == bs->bh)
+ 				ea_bdebug(new_bh, "keeping");
+ 			else {
++				error = -ENOSPC;
++				if (DLIMIT_ALLOC_BLOCK(inode, 1))
++					goto cleanup;
+ 				/* The old block is released after updating
+ 				   the inode. */
+ 				error = -EDQUOT;
+ 				if (DQUOT_ALLOC_BLOCK(inode, 1))
+-					goto cleanup;
++					goto cleanup_dlimit;
+ 				error = ext3_journal_get_write_access(handle,
+ 								      new_bh);
+ 				if (error)
+@@ -841,6 +846,8 @@ cleanup:
+ 
+ cleanup_dquot:
+ 	DQUOT_FREE_BLOCK(inode, 1);
++cleanup_dlimit:
++	DLIMIT_FREE_BLOCK(inode, 1);
+ 	goto cleanup;
+ 
+ bad_block:
+Index: linux-2.6.20/fs/ext4/balloc.c
+===================================================================
+--- linux-2.6.20.orig/fs/ext4/balloc.c
++++ linux-2.6.20/fs/ext4/balloc.c
+@@ -19,6 +19,8 @@
+ #include <linux/ext4_jbd2.h>
+ #include <linux/quotaops.h>
+ #include <linux/buffer_head.h>
++#include <linux/vs_dlimit.h>
++#include <linux/vs_tag.h>
+ 
+ /*
+  * balloc.c contains the blocks allocation and deallocation routines
+@@ -630,8 +632,10 @@ void ext4_free_blocks(handle_t *handle, 
+ 		return;
+ 	}
+ 	ext4_free_blocks_sb(handle, sb, block, count, &dquot_freed_blocks);
+-	if (dquot_freed_blocks)
++	if (dquot_freed_blocks) {
++		DLIMIT_FREE_BLOCK(inode, dquot_freed_blocks);
+ 		DQUOT_FREE_BLOCK(inode, dquot_freed_blocks);
++	}
+ 	return;
+ }
+ 
+@@ -1370,18 +1374,33 @@ out:
+  *
+  * Check if filesystem has at least 1 free block available for allocation.
+  */
+-static int ext4_has_free_blocks(struct ext4_sb_info *sbi)
++static int ext4_has_free_blocks(struct super_block *sb)
+ {
++	struct ext4_sb_info *sbi = EXT4_SB(sb);
+ 	ext4_fsblk_t free_blocks, root_blocks;
++	int cond;
+ 
+ 	free_blocks = percpu_counter_read_positive(&sbi->s_freeblocks_counter);
+ 	root_blocks = ext4_r_blocks_count(sbi->s_es);
+-	if (free_blocks < root_blocks + 1 && !capable(CAP_SYS_RESOURCE) &&
++
++	vxdprintk(VXD_CBIT(dlim, 3),
++		"ext4_has_free_blocks(%p): free=%llu, root=%llu",
++		sb, free_blocks, root_blocks);
++
++	DLIMIT_ADJUST_BLOCK(sb, dx_current_tag(), &free_blocks, &root_blocks);
++
++	cond = (free_blocks < root_blocks + 1 &&
++		!capable(CAP_SYS_RESOURCE) &&
+ 		sbi->s_resuid != current->fsuid &&
+-		(sbi->s_resgid == 0 || !in_group_p (sbi->s_resgid))) {
+-		return 0;
+-	}
+-	return 1;
++		(sbi->s_resgid == 0 || !in_group_p (sbi->s_resgid)));
++
++	vxdprintk(VXD_CBIT(dlim, 3),
++		"ext4_has_free_blocks(%p): %llu<%llu+1, %c, %u!=%u r=%d",
++		sb, free_blocks, root_blocks,
++		!capable(CAP_SYS_RESOURCE)?'1':'0',
++		sbi->s_resuid, current->fsuid, cond?0:1);
++
++	return (cond ? 0 : 1);
+ }
+ 
+ /**
+@@ -1398,7 +1417,7 @@ static int ext4_has_free_blocks(struct e
+  */
+ int ext4_should_retry_alloc(struct super_block *sb, int *retries)
+ {
+-	if (!ext4_has_free_blocks(EXT4_SB(sb)) || (*retries)++ > 3)
++	if (!ext4_has_free_blocks(sb) || (*retries)++ > 3)
+ 		return 0;
+ 
+ 	jbd_debug(1, "%s: retrying operation after ENOSPC\n", sb->s_id);
+@@ -1461,6 +1480,8 @@ ext4_fsblk_t ext4_new_blocks(handle_t *h
+ 		*errp = -EDQUOT;
+ 		return 0;
+ 	}
++	if (DLIMIT_ALLOC_BLOCK(inode, 1))
++	    goto out_dlimit;
+ 
+ 	sbi = EXT4_SB(sb);
+ 	es = EXT4_SB(sb)->s_es;
+@@ -1477,7 +1498,7 @@ ext4_fsblk_t ext4_new_blocks(handle_t *h
+ 	if (block_i && ((windowsz = block_i->rsv_window_node.rsv_goal_size) > 0))
+ 		my_rsv = &block_i->rsv_window_node;
+ 
+-	if (!ext4_has_free_blocks(sbi)) {
++	if (!ext4_has_free_blocks(sb)) {
+ 		*errp = -ENOSPC;
+ 		goto out;
+ 	}
+@@ -1667,6 +1688,9 @@ allocated:
+ io_error:
+ 	*errp = -EIO;
+ out:
++	if (!performed_allocation)
++		DLIMIT_FREE_BLOCK(inode, 1);
++out_dlimit:
+ 	if (fatal) {
+ 		*errp = fatal;
+ 		ext4_std_error(sb, fatal);
+Index: linux-2.6.20/fs/ext4/file.c
+===================================================================
+--- linux-2.6.20.orig/fs/ext4/file.c
++++ linux-2.6.20/fs/ext4/file.c
+@@ -121,6 +121,7 @@ const struct file_operations ext4_file_o
+ 	.release	= ext4_release_file,
+ 	.fsync		= ext4_sync_file,
+ 	.sendfile	= generic_file_sendfile,
++	.sendpage	= generic_file_sendpage,
+ 	.splice_read	= generic_file_splice_read,
+ 	.splice_write	= generic_file_splice_write,
+ };
+@@ -135,5 +136,6 @@ struct inode_operations ext4_file_inode_
+ 	.removexattr	= generic_removexattr,
+ #endif
+ 	.permission	= ext4_permission,
++	.sync_flags	= ext4_sync_flags,
+ };
+ 
+Index: linux-2.6.20/fs/ext4/ialloc.c
+===================================================================
+--- linux-2.6.20.orig/fs/ext4/ialloc.c
++++ linux-2.6.20/fs/ext4/ialloc.c
+@@ -24,6 +24,8 @@
+ #include <linux/random.h>
+ #include <linux/bitops.h>
+ #include <linux/blkdev.h>
++#include <linux/vs_dlimit.h>
++#include <linux/vs_tag.h>
+ #include <asm/byteorder.h>
+ 
+ #include "xattr.h"
+@@ -127,6 +129,7 @@ void ext4_free_inode (handle_t *handle, 
+ 	ext4_xattr_delete_inode(handle, inode);
+ 	DQUOT_FREE_INODE(inode);
+ 	DQUOT_DROP(inode);
++	DLIMIT_FREE_INODE(inode);
+ 
+ 	is_directory = S_ISDIR(inode->i_mode);
+ 
+@@ -448,6 +451,12 @@ struct inode *ext4_new_inode(handle_t *h
+ 	inode = new_inode(sb);
+ 	if (!inode)
+ 		return ERR_PTR(-ENOMEM);
++
++	inode->i_tag = dx_current_fstag(sb);
++	if (DLIMIT_ALLOC_INODE(inode)) {
++		err = -ENOSPC;
++		goto out_dlimit;
++	}
+ 	ei = EXT4_I(inode);
+ 
+ 	sbi = EXT4_SB(sb);
+@@ -569,7 +578,8 @@ got:
+ 	ei->i_dir_start_lookup = 0;
+ 	ei->i_disksize = 0;
+ 
+-	ei->i_flags = EXT4_I(dir)->i_flags & ~EXT4_INDEX_FL;
++	ei->i_flags = EXT4_I(dir)->i_flags &
++		~(EXT4_INDEX_FL|EXT4_IUNLINK_FL|EXT4_BARRIER_FL);
+ 	if (S_ISLNK(mode))
+ 		ei->i_flags &= ~(EXT4_IMMUTABLE_FL|EXT4_APPEND_FL);
+ 	/* dirsync only applies to directories */
+@@ -635,6 +645,8 @@ got:
+ fail:
+ 	ext4_std_error(sb, err);
+ out:
++	DLIMIT_FREE_INODE(inode);
++out_dlimit:
+ 	iput(inode);
+ 	ret = ERR_PTR(err);
+ really_out:
+@@ -646,6 +658,7 @@ fail_free_drop:
+ 
+ fail_drop:
+ 	DQUOT_DROP(inode);
++	DLIMIT_FREE_INODE(inode);
+ 	inode->i_flags |= S_NOQUOTA;
+ 	inode->i_nlink = 0;
+ 	iput(inode);
+Index: linux-2.6.20/fs/ext4/inode.c
+===================================================================
+--- linux-2.6.20.orig/fs/ext4/inode.c
++++ linux-2.6.20/fs/ext4/inode.c
+@@ -37,6 +37,7 @@
+ #include <linux/mpage.h>
+ #include <linux/uio.h>
+ #include <linux/bio.h>
++#include <linux/vs_tag.h>
+ #include "xattr.h"
+ #include "acl.h"
+ 
+@@ -2310,7 +2311,7 @@ void ext4_truncate(struct inode *inode)
+ 		return;
+ 	if (ext4_inode_is_fast_symlink(inode))
+ 		return;
+-	if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
++	if (IS_APPEND(inode) || IS_IXORUNLINK(inode))
+ 		return;
+ 
+ 	/*
+@@ -2636,19 +2637,65 @@ void ext4_set_inode_flags(struct inode *
+ {
+ 	unsigned int flags = EXT4_I(inode)->i_flags;
+ 
+-	inode->i_flags &= ~(S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC);
++	inode->i_flags &= ~(S_IMMUTABLE | S_IUNLINK | S_BARRIER |
++		S_SYNC | S_APPEND | S_NOATIME | S_DIRSYNC);
++
++	if (flags & EXT4_IMMUTABLE_FL)
++		inode->i_flags |= S_IMMUTABLE;
++	if (flags & EXT4_IUNLINK_FL)
++		inode->i_flags |= S_IUNLINK;
++	if (flags & EXT4_BARRIER_FL)
++		inode->i_flags |= S_BARRIER;
++
+ 	if (flags & EXT4_SYNC_FL)
+ 		inode->i_flags |= S_SYNC;
+ 	if (flags & EXT4_APPEND_FL)
+ 		inode->i_flags |= S_APPEND;
+-	if (flags & EXT4_IMMUTABLE_FL)
+-		inode->i_flags |= S_IMMUTABLE;
+ 	if (flags & EXT4_NOATIME_FL)
+ 		inode->i_flags |= S_NOATIME;
+ 	if (flags & EXT4_DIRSYNC_FL)
+ 		inode->i_flags |= S_DIRSYNC;
+ }
+ 
++int ext4_sync_flags(struct inode *inode)
++{
++	unsigned int oldflags, newflags;
++	int err = 0;
++
++	oldflags = EXT4_I(inode)->i_flags;
++	newflags = oldflags & ~(EXT4_IMMUTABLE_FL |
++		EXT4_IUNLINK_FL | EXT4_BARRIER_FL);
++
++	if (IS_IMMUTABLE(inode))
++		newflags |= EXT4_IMMUTABLE_FL;
++	if (IS_IUNLINK(inode))
++		newflags |= EXT4_IUNLINK_FL;
++	if (IS_BARRIER(inode))
++		newflags |= EXT4_BARRIER_FL;
++
++	if (oldflags ^ newflags) {
++		handle_t *handle;
++		struct ext4_iloc iloc;
++
++		handle = ext4_journal_start(inode, 1);
++		if (IS_ERR(handle))
++			return PTR_ERR(handle);
++		if (IS_SYNC(inode))
++			handle->h_sync = 1;
++		err = ext4_reserve_inode_write(handle, inode, &iloc);
++		if (err)
++			goto flags_err;
++
++		EXT4_I(inode)->i_flags = newflags;
++		inode->i_ctime = CURRENT_TIME;
++
++		err = ext4_mark_iloc_dirty(handle, inode, &iloc);
++	flags_err:
++		ext4_journal_stop(handle);
++	}
++	return err;
++}
++
+ void ext4_read_inode(struct inode * inode)
+ {
+ 	struct ext4_iloc iloc;
+@@ -2656,6 +2703,8 @@ void ext4_read_inode(struct inode * inod
+ 	struct ext4_inode_info *ei = EXT4_I(inode);
+ 	struct buffer_head *bh;
+ 	int block;
++	uid_t uid;
++	gid_t gid;
+ 
+ #ifdef CONFIG_EXT4DEV_FS_POSIX_ACL
+ 	ei->i_acl = EXT4_ACL_NOT_CACHED;
+@@ -2668,12 +2717,17 @@ void ext4_read_inode(struct inode * inod
+ 	bh = iloc.bh;
+ 	raw_inode = ext4_raw_inode(&iloc);
+ 	inode->i_mode = le16_to_cpu(raw_inode->i_mode);
+-	inode->i_uid = (uid_t)le16_to_cpu(raw_inode->i_uid_low);
+-	inode->i_gid = (gid_t)le16_to_cpu(raw_inode->i_gid_low);
++	uid = (uid_t)le16_to_cpu(raw_inode->i_uid_low);
++	gid = (gid_t)le16_to_cpu(raw_inode->i_gid_low);
+ 	if(!(test_opt (inode->i_sb, NO_UID32))) {
+-		inode->i_uid |= le16_to_cpu(raw_inode->i_uid_high) << 16;
+-		inode->i_gid |= le16_to_cpu(raw_inode->i_gid_high) << 16;
++		uid |= le16_to_cpu(raw_inode->i_uid_high) << 16;
++		gid |= le16_to_cpu(raw_inode->i_gid_high) << 16;
+ 	}
++	inode->i_uid = INOTAG_UID(DX_TAG(inode), uid, gid);
++	inode->i_gid = INOTAG_GID(DX_TAG(inode), uid, gid);
++	inode->i_tag = INOTAG_TAG(DX_TAG(inode), uid, gid,
++		le16_to_cpu(raw_inode->i_raw_tag));
++
+ 	inode->i_nlink = le16_to_cpu(raw_inode->i_links_count);
+ 	inode->i_size = le32_to_cpu(raw_inode->i_size);
+ 	inode->i_atime.tv_sec = le32_to_cpu(raw_inode->i_atime);
+@@ -2801,6 +2855,8 @@ static int ext4_do_update_inode(handle_t
+ 	struct ext4_inode *raw_inode = ext4_raw_inode(iloc);
+ 	struct ext4_inode_info *ei = EXT4_I(inode);
+ 	struct buffer_head *bh = iloc->bh;
++	uid_t uid = TAGINO_UID(DX_TAG(inode), inode->i_uid, inode->i_tag);
++	gid_t gid = TAGINO_GID(DX_TAG(inode), inode->i_gid, inode->i_tag);
+ 	int err = 0, rc, block;
+ 
+ 	/* For fields not not tracking in the in-memory inode,
+@@ -2810,29 +2866,32 @@ static int ext4_do_update_inode(handle_t
+ 
+ 	raw_inode->i_mode = cpu_to_le16(inode->i_mode);
+ 	if(!(test_opt(inode->i_sb, NO_UID32))) {
+-		raw_inode->i_uid_low = cpu_to_le16(low_16_bits(inode->i_uid));
+-		raw_inode->i_gid_low = cpu_to_le16(low_16_bits(inode->i_gid));
++		raw_inode->i_uid_low = cpu_to_le16(low_16_bits(uid));
++		raw_inode->i_gid_low = cpu_to_le16(low_16_bits(gid));
+ /*
+  * Fix up interoperability with old kernels. Otherwise, old inodes get
+  * re-used with the upper 16 bits of the uid/gid intact
+  */
+ 		if(!ei->i_dtime) {
+ 			raw_inode->i_uid_high =
+-				cpu_to_le16(high_16_bits(inode->i_uid));
++				cpu_to_le16(high_16_bits(uid));
+ 			raw_inode->i_gid_high =
+-				cpu_to_le16(high_16_bits(inode->i_gid));
++				cpu_to_le16(high_16_bits(gid));
+ 		} else {
+ 			raw_inode->i_uid_high = 0;
+ 			raw_inode->i_gid_high = 0;
+ 		}
+ 	} else {
+ 		raw_inode->i_uid_low =
+-			cpu_to_le16(fs_high2lowuid(inode->i_uid));
++			cpu_to_le16(fs_high2lowuid(uid));
+ 		raw_inode->i_gid_low =
+-			cpu_to_le16(fs_high2lowgid(inode->i_gid));
++			cpu_to_le16(fs_high2lowgid(gid));
+ 		raw_inode->i_uid_high = 0;
+ 		raw_inode->i_gid_high = 0;
+ 	}
++#ifdef CONFIG_TAGGING_INTERN
++	raw_inode->i_raw_tag = cpu_to_le16(inode->i_tag);
++#endif
+ 	raw_inode->i_links_count = cpu_to_le16(inode->i_nlink);
+ 	raw_inode->i_size = cpu_to_le32(ei->i_disksize);
+ 	raw_inode->i_atime = cpu_to_le32(inode->i_atime.tv_sec);
+@@ -2989,7 +3048,8 @@ int ext4_setattr(struct dentry *dentry, 
+ 		return error;
+ 
+ 	if ((ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid) ||
+-		(ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid)) {
++		(ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid) ||
++		(ia_valid & ATTR_TAG && attr->ia_tag != inode->i_tag)) {
+ 		handle_t *handle;
+ 
+ 		/* (user+group)*(old+new) structure, inode write (sb,
+@@ -3011,6 +3071,8 @@ int ext4_setattr(struct dentry *dentry, 
+ 			inode->i_uid = attr->ia_uid;
+ 		if (attr->ia_valid & ATTR_GID)
+ 			inode->i_gid = attr->ia_gid;
++		if ((attr->ia_valid & ATTR_TAG) && IS_TAGGED(inode))
++			inode->i_tag = attr->ia_tag;
+ 		error = ext4_mark_inode_dirty(handle, inode);
+ 		ext4_journal_stop(handle);
+ 	}
+Index: linux-2.6.20/fs/ext4/ioctl.c
+===================================================================
+--- linux-2.6.20.orig/fs/ext4/ioctl.c
++++ linux-2.6.20/fs/ext4/ioctl.c
+@@ -8,6 +8,7 @@
+  */
+ 
+ #include <linux/fs.h>
++#include <linux/mount.h>
+ #include <linux/jbd2.h>
+ #include <linux/capability.h>
+ #include <linux/ext4_fs.h>
+@@ -15,6 +16,7 @@
+ #include <linux/time.h>
+ #include <linux/compat.h>
+ #include <linux/smp_lock.h>
++#include <linux/vs_tag.h>
+ #include <asm/uaccess.h>
+ 
+ int ext4_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,
+@@ -37,7 +39,8 @@ int ext4_ioctl (struct inode * inode, st
+ 		unsigned int oldflags;
+ 		unsigned int jflag;
+ 
+-		if (IS_RDONLY(inode))
++		if (IS_RDONLY(inode) ||
++			(filp && MNT_IS_RDONLY(filp->f_vfsmnt)))
+ 			return -EROFS;
+ 
+ 		if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+@@ -61,7 +64,9 @@ int ext4_ioctl (struct inode * inode, st
+ 		 *
+ 		 * This test looks nicer. Thanks to Pauline Middelink
+ 		 */
+-		if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) {
++		if ((oldflags & EXT4_IMMUTABLE_FL) ||
++			((flags ^ oldflags) & (EXT4_APPEND_FL |
++			EXT4_IMMUTABLE_FL | EXT4_IUNLINK_FL))) {
+ 			if (!capable(CAP_LINUX_IMMUTABLE)) {
+ 				mutex_unlock(&inode->i_mutex);
+ 				return -EPERM;
+@@ -123,7 +128,8 @@ flags_err:
+ 
+ 		if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+ 			return -EPERM;
+-		if (IS_RDONLY(inode))
++		if (IS_RDONLY(inode) ||
++			(filp && MNT_IS_RDONLY(filp->f_vfsmnt)))
+ 			return -EROFS;
+ 		if (get_user(generation, (int __user *) arg))
+ 			return -EFAULT;
+@@ -177,7 +183,8 @@ flags_err:
+ 		if (!test_opt(inode->i_sb, RESERVATION) ||!S_ISREG(inode->i_mode))
+ 			return -ENOTTY;
+ 
+-		if (IS_RDONLY(inode))
++		if (IS_RDONLY(inode) ||
++			(filp && MNT_IS_RDONLY(filp->f_vfsmnt)))
+ 			return -EROFS;
+ 
+ 		if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+@@ -212,7 +219,8 @@ flags_err:
+ 		if (!capable(CAP_SYS_RESOURCE))
+ 			return -EPERM;
+ 
+-		if (IS_RDONLY(inode))
++		if (IS_RDONLY(inode) ||
++			(filp && MNT_IS_RDONLY(filp->f_vfsmnt)))
+ 			return -EROFS;
+ 
+ 		if (get_user(n_blocks_count, (__u32 __user *)arg))
+@@ -233,7 +241,8 @@ flags_err:
+ 		if (!capable(CAP_SYS_RESOURCE))
+ 			return -EPERM;
+ 
+-		if (IS_RDONLY(inode))
++		if (IS_RDONLY(inode) ||
++			(filp && MNT_IS_RDONLY(filp->f_vfsmnt)))
+ 			return -EROFS;
+ 
+ 		if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg,
+@@ -247,7 +256,6 @@ flags_err:
+ 
+ 		return err;
+ 	}
+-
+ 	default:
+ 		return -ENOTTY;
+ 	}
+Index: linux-2.6.20/fs/ext4/namei.c
+===================================================================
+--- linux-2.6.20.orig/fs/ext4/namei.c
++++ linux-2.6.20/fs/ext4/namei.c
+@@ -37,6 +37,7 @@
+ #include <linux/buffer_head.h>
+ #include <linux/bio.h>
+ #include <linux/smp_lock.h>
++#include <linux/vs_tag.h>
+ 
+ #include "namei.h"
+ #include "xattr.h"
+@@ -1017,6 +1018,7 @@ static struct dentry *ext4_lookup(struct
+ 
+ 		if (!inode)
+ 			return ERR_PTR(-EACCES);
++		dx_propagate_tag(nd, inode);
+ 	}
+ 	return d_splice_alias(inode, dentry);
+ }
+@@ -2390,6 +2392,7 @@ struct inode_operations ext4_dir_inode_o
+ 	.removexattr	= generic_removexattr,
+ #endif
+ 	.permission	= ext4_permission,
++	.sync_flags	= ext4_sync_flags,
+ };
+ 
+ struct inode_operations ext4_special_inode_operations = {
+@@ -2401,4 +2404,5 @@ struct inode_operations ext4_special_ino
+ 	.removexattr	= generic_removexattr,
+ #endif
+ 	.permission	= ext4_permission,
++	.sync_flags	= ext4_sync_flags,
+ };
+Index: linux-2.6.20/fs/ext4/super.c
+===================================================================
+--- linux-2.6.20.orig/fs/ext4/super.c
++++ linux-2.6.20/fs/ext4/super.c
+@@ -656,12 +656,12 @@ static int ext4_write_dquot(struct dquot
+ static int ext4_acquire_dquot(struct dquot *dquot);
+ static int ext4_release_dquot(struct dquot *dquot);
+ static int ext4_mark_dquot_dirty(struct dquot *dquot);
+-static int ext4_write_info(struct super_block *sb, int type);
+-static int ext4_quota_on(struct super_block *sb, int type, int format_id, char *path);
+-static int ext4_quota_on_mount(struct super_block *sb, int type);
+-static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data,
++static int ext4_write_info(struct dqhash *hash, int type);
++static int ext4_quota_on(struct dqhash *hash, int type, int format_id, char *path);
++static int ext4_quota_on_mount(struct dqhash *hash, int type);
++static ssize_t ext4_quota_read(struct dqhash *hash, int type, char *data,
+ 			       size_t len, loff_t off);
+-static ssize_t ext4_quota_write(struct super_block *sb, int type,
++static ssize_t ext4_quota_write(struct dqhash *hash, int type,
+ 				const char *data, size_t len, loff_t off);
+ 
+ static struct dquot_operations ext4_quota_operations = {
+@@ -728,7 +728,7 @@ enum {
+ 	Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota,
+ 	Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota,
+ 	Opt_ignore, Opt_barrier, Opt_err, Opt_resize, Opt_usrquota,
+-	Opt_grpquota, Opt_extents,
++	Opt_grpquota, Opt_extents, Opt_tag, Opt_notag, Opt_tagid
+ };
+ 
+ static match_table_t tokens = {
+@@ -779,6 +779,10 @@ static match_table_t tokens = {
+ 	{Opt_usrquota, "usrquota"},
+ 	{Opt_barrier, "barrier=%u"},
+ 	{Opt_extents, "extents"},
++	{Opt_tag, "tag"},
++	{Opt_notag, "notag"},
++	{Opt_tagid, "tagid=%u"},
++	{Opt_tag, "tagxid"},
+ 	{Opt_err, NULL},
+ 	{Opt_resize, "resize"},
+ };
+@@ -872,6 +876,20 @@ static int parse_options (char *options,
+ 		case Opt_nouid32:
+ 			set_opt (sbi->s_mount_opt, NO_UID32);
+ 			break;
++#ifndef CONFIG_TAGGING_NONE
++		case Opt_tag:
++			set_opt (sbi->s_mount_opt, TAGGED);
++			break;
++		case Opt_notag:
++			clear_opt (sbi->s_mount_opt, TAGGED);
++			break;
++#endif
++#ifdef CONFIG_PROPAGATE
++		case Opt_tagid:
++			/* use args[0] */
++			set_opt (sbi->s_mount_opt, TAGGED);
++			break;
++#endif
+ 		case Opt_nocheck:
+ 			clear_opt (sbi->s_mount_opt, CHECK);
+ 			break;
+@@ -990,7 +1008,7 @@ static int parse_options (char *options,
+ 		case Opt_grpjquota:
+ 			qtype = GRPQUOTA;
+ set_qf_name:
+-			if (sb_any_quota_enabled(sb)) {
++			if (dqh_any_quota_enabled(sb->s_dqh)) {
+ 				printk(KERN_ERR
+ 					"EXT4-fs: Cannot change journalled "
+ 					"quota options when quota turned on.\n");
+@@ -1028,7 +1046,7 @@ set_qf_name:
+ 		case Opt_offgrpjquota:
+ 			qtype = GRPQUOTA;
+ clear_qf_name:
+-			if (sb_any_quota_enabled(sb)) {
++			if (dqh_any_quota_enabled(sb->s_dqh)) {
+ 				printk(KERN_ERR "EXT4-fs: Cannot change "
+ 					"journalled quota options when "
+ 					"quota turned on.\n");
+@@ -1056,7 +1074,7 @@ clear_qf_name:
+ 			set_opt(sbi->s_mount_opt, GRPQUOTA);
+ 			break;
+ 		case Opt_noquota:
+-			if (sb_any_quota_enabled(sb)) {
++			if (dqh_any_quota_enabled(sb->s_dqh)) {
+ 				printk(KERN_ERR "EXT4-fs: Cannot change quota "
+ 					"options when quota turned on.\n");
+ 				return 0;
+@@ -1347,7 +1365,7 @@ static void ext4_orphan_cleanup (struct 
+ 	/* Turn on quotas so that they are updated correctly */
+ 	for (i = 0; i < MAXQUOTAS; i++) {
+ 		if (EXT4_SB(sb)->s_qf_names[i]) {
+-			int ret = ext4_quota_on_mount(sb, i);
++			int ret = ext4_quota_on_mount(sb->s_dqh, i);
+ 			if (ret < 0)
+ 				printk(KERN_ERR
+ 					"EXT4-fs: Cannot turn on journalled "
+@@ -1397,8 +1415,8 @@ static void ext4_orphan_cleanup (struct 
+ #ifdef CONFIG_QUOTA
+ 	/* Turn quotas off */
+ 	for (i = 0; i < MAXQUOTAS; i++) {
+-		if (sb_dqopt(sb)->files[i])
+-			vfs_quota_off(sb, i);
++		if (dqh_dqopt(sb->s_dqh)->files[i])
++			vfs_quota_off(sb->s_dqh, i);
+ 	}
+ #endif
+ 	sb->s_flags = s_flags; /* Restore MS_RDONLY status */
+@@ -1545,6 +1563,9 @@ static int ext4_fill_super (struct super
+ 			    NULL, 0))
+ 		goto failed_mount;
+ 
++	if (EXT4_SB(sb)->s_mount_opt & EXT4_MOUNT_TAGGED)
++		sb->s_flags |= MS_TAGGED;
++
+ 	sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
+ 		((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
+ 
+@@ -1763,8 +1784,8 @@ static int ext4_fill_super (struct super
+ 	sb->s_export_op = &ext4_export_ops;
+ 	sb->s_xattr = ext4_xattr_handlers;
+ #ifdef CONFIG_QUOTA
+-	sb->s_qcop = &ext4_qctl_operations;
+-	sb->dq_op = &ext4_quota_operations;
++	sb->s_dqh->dqh_qop = &ext4_quota_operations;
++	sb->s_dqh->dqh_qcop = &ext4_qctl_operations;
+ #endif
+ 	INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */
+ 
+@@ -2376,6 +2397,12 @@ static int ext4_remount (struct super_bl
+ 
+ 	if (sbi->s_mount_opt & EXT4_MOUNT_ABORT)
+ 		ext4_abort(sb, __FUNCTION__, "Abort forced by user");
++	if ((sbi->s_mount_opt & EXT4_MOUNT_TAGGED) &&
++		!(sb->s_flags & MS_TAGGED)) {
++		printk("EXT4-fs: %s: tagging not permitted on remount.\n",
++			sb->s_id);
++		return -EINVAL;
++	}
+ 
+ 	sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
+ 		((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
+@@ -2534,7 +2561,7 @@ static int ext4_statfs (struct dentry * 
+ 
+ static inline struct inode *dquot_to_inode(struct dquot *dquot)
+ {
+-	return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type];
++	return dqh_dqopt(dquot->dq_dqh)->files[dquot->dq_type];
+ }
+ 
+ static int ext4_dquot_initialize(struct inode *inode, int type)
+@@ -2577,7 +2604,7 @@ static int ext4_write_dquot(struct dquot
+ 
+ 	inode = dquot_to_inode(dquot);
+ 	handle = ext4_journal_start(inode,
+-					EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
++		EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_dqh->dqh_sb));
+ 	if (IS_ERR(handle))
+ 		return PTR_ERR(handle);
+ 	ret = dquot_commit(dquot);
+@@ -2593,7 +2620,7 @@ static int ext4_acquire_dquot(struct dqu
+ 	handle_t *handle;
+ 
+ 	handle = ext4_journal_start(dquot_to_inode(dquot),
+-					EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb));
++		EXT4_QUOTA_INIT_BLOCKS(dquot->dq_dqh->dqh_sb));
+ 	if (IS_ERR(handle))
+ 		return PTR_ERR(handle);
+ 	ret = dquot_acquire(dquot);
+@@ -2609,7 +2636,7 @@ static int ext4_release_dquot(struct dqu
+ 	handle_t *handle;
+ 
+ 	handle = ext4_journal_start(dquot_to_inode(dquot),
+-					EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb));
++		EXT4_QUOTA_DEL_BLOCKS(dquot->dq_dqh->dqh_sb));
+ 	if (IS_ERR(handle))
+ 		return PTR_ERR(handle);
+ 	ret = dquot_release(dquot);
+@@ -2622,8 +2649,8 @@ static int ext4_release_dquot(struct dqu
+ static int ext4_mark_dquot_dirty(struct dquot *dquot)
+ {
+ 	/* Are we journalling quotas? */
+-	if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
+-	    EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
++	if (EXT4_SB(dquot->dq_dqh->dqh_sb)->s_qf_names[USRQUOTA] ||
++	    EXT4_SB(dquot->dq_dqh->dqh_sb)->s_qf_names[GRPQUOTA]) {
+ 		dquot_mark_dquot_dirty(dquot);
+ 		return ext4_write_dquot(dquot);
+ 	} else {
+@@ -2631,8 +2658,9 @@ static int ext4_mark_dquot_dirty(struct 
+ 	}
+ }
+ 
+-static int ext4_write_info(struct super_block *sb, int type)
++static int ext4_write_info(struct dqhash *hash, int type)
+ {
++	struct super_block *sb = hash->dqh_sb;
+ 	int ret, err;
+ 	handle_t *handle;
+ 
+@@ -2640,7 +2668,7 @@ static int ext4_write_info(struct super_
+ 	handle = ext4_journal_start(sb->s_root->d_inode, 2);
+ 	if (IS_ERR(handle))
+ 		return PTR_ERR(handle);
+-	ret = dquot_commit_info(sb, type);
++	ret = dquot_commit_info(hash, type);
+ 	err = ext4_journal_stop(handle);
+ 	if (!ret)
+ 		ret = err;
+@@ -2651,18 +2679,20 @@ static int ext4_write_info(struct super_
+  * Turn on quotas during mount time - we need to find
+  * the quota file and such...
+  */
+-static int ext4_quota_on_mount(struct super_block *sb, int type)
++static int ext4_quota_on_mount(struct dqhash *hash, int type)
+ {
+-	return vfs_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type],
+-			EXT4_SB(sb)->s_jquota_fmt, type);
++	return vfs_quota_on_mount(hash,
++		EXT4_SB(hash->dqh_sb)->s_qf_names[type],
++		EXT4_SB(hash->dqh_sb)->s_jquota_fmt, type);
+ }
+ 
+ /*
+  * Standard function to be called on quota_on
+  */
+-static int ext4_quota_on(struct super_block *sb, int type, int format_id,
++static int ext4_quota_on(struct dqhash *hash, int type, int format_id,
+ 			 char *path)
+ {
++	struct super_block *sb = hash->dqh_sb;
+ 	int err;
+ 	struct nameidata nd;
+ 
+@@ -2671,7 +2701,7 @@ static int ext4_quota_on(struct super_bl
+ 	/* Not journalling quota? */
+ 	if (!EXT4_SB(sb)->s_qf_names[USRQUOTA] &&
+ 	    !EXT4_SB(sb)->s_qf_names[GRPQUOTA])
+-		return vfs_quota_on(sb, type, format_id, path);
++		return vfs_quota_on(hash, type, format_id, path);
+ 	err = path_lookup(path, LOOKUP_FOLLOW, &nd);
+ 	if (err)
+ 		return err;
+@@ -2686,17 +2716,18 @@ static int ext4_quota_on(struct super_bl
+ 			"EXT4-fs: Quota file not on filesystem root. "
+ 			"Journalled quota will not work.\n");
+ 	path_release(&nd);
+-	return vfs_quota_on(sb, type, format_id, path);
++	return vfs_quota_on(hash, type, format_id, path);
+ }
+ 
+ /* Read data from quotafile - avoid pagecache and such because we cannot afford
+  * acquiring the locks... As quota files are never truncated and quota code
+  * itself serializes the operations (and noone else should touch the files)
+  * we don't have to be afraid of races */
+-static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data,
++static ssize_t ext4_quota_read(struct dqhash *hash, int type, char *data,
+ 			       size_t len, loff_t off)
+ {
+-	struct inode *inode = sb_dqopt(sb)->files[type];
++	struct inode *inode = dqh_dqopt(hash)->files[type];
++	struct super_block *sb = hash->dqh_sb;
+ 	sector_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb);
+ 	int err = 0;
+ 	int offset = off & (sb->s_blocksize - 1);
+@@ -2731,10 +2762,11 @@ static ssize_t ext4_quota_read(struct su
+ 
+ /* Write to quotafile (we know the transaction is already started and has
+  * enough credits) */
+-static ssize_t ext4_quota_write(struct super_block *sb, int type,
++static ssize_t ext4_quota_write(struct dqhash *hash, int type,
+ 				const char *data, size_t len, loff_t off)
+ {
+-	struct inode *inode = sb_dqopt(sb)->files[type];
++	struct inode *inode = dqh_dqopt(hash)->files[type];
++	struct super_block *sb = hash->dqh_sb;
+ 	sector_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb);
+ 	int err = 0;
+ 	int offset = off & (sb->s_blocksize - 1);
+Index: linux-2.6.20/fs/ext4/symlink.c
+===================================================================
+--- linux-2.6.20.orig/fs/ext4/symlink.c
++++ linux-2.6.20/fs/ext4/symlink.c
+@@ -40,6 +40,7 @@ struct inode_operations ext4_symlink_ino
+ 	.listxattr	= ext4_listxattr,
+ 	.removexattr	= generic_removexattr,
+ #endif
++	.sync_flags	= ext4_sync_flags,
+ };
+ 
+ struct inode_operations ext4_fast_symlink_inode_operations = {
+@@ -51,4 +52,5 @@ struct inode_operations ext4_fast_symlin
+ 	.listxattr	= ext4_listxattr,
+ 	.removexattr	= generic_removexattr,
+ #endif
++	.sync_flags	= ext4_sync_flags,
+ };
+Index: linux-2.6.20/fs/ext4/xattr.c
+===================================================================
+--- linux-2.6.20.orig/fs/ext4/xattr.c
++++ linux-2.6.20/fs/ext4/xattr.c
+@@ -58,6 +58,7 @@
+ #include <linux/mbcache.h>
+ #include <linux/quotaops.h>
+ #include <linux/rwsem.h>
++#include <linux/vs_dlimit.h>
+ #include "xattr.h"
+ #include "acl.h"
+ 
+@@ -492,6 +493,7 @@ ext4_xattr_release_block(handle_t *handl
+ 			ext4_journal_dirty_metadata(handle, bh);
+ 			if (IS_SYNC(inode))
+ 				handle->h_sync = 1;
++			DLIMIT_FREE_BLOCK(inode, 1);
+ 			DQUOT_FREE_BLOCK(inode, 1);
+ 			unlock_buffer(bh);
+ 			ea_bdebug(bh, "refcount now=%d; releasing",
+@@ -760,11 +762,14 @@ inserted:
+ 			if (new_bh == bs->bh)
+ 				ea_bdebug(new_bh, "keeping");
+ 			else {
++				error = -ENOSPC;
++				if (DLIMIT_ALLOC_BLOCK(inode, 1))
++					goto cleanup;
+ 				/* The old block is released after updating
+ 				   the inode. */
+ 				error = -EDQUOT;
+ 				if (DQUOT_ALLOC_BLOCK(inode, 1))
+-					goto cleanup;
++					goto cleanup_dlimit;
+ 				error = ext4_journal_get_write_access(handle,
+ 								      new_bh);
+ 				if (error)
+@@ -841,6 +846,8 @@ cleanup:
+ 
+ cleanup_dquot:
+ 	DQUOT_FREE_BLOCK(inode, 1);
++cleanup_dlimit:
++	DLIMIT_FREE_BLOCK(inode, 1);
+ 	goto cleanup;
+ 
+ bad_block:
+Index: linux-2.6.20/fs/fcntl.c
+===================================================================
+--- linux-2.6.20.orig/fs/fcntl.c
++++ linux-2.6.20/fs/fcntl.c
+@@ -18,6 +18,7 @@
+ #include <linux/ptrace.h>
+ #include <linux/signal.h>
+ #include <linux/rcupdate.h>
++#include <linux/vs_limit.h>
+ 
+ #include <asm/poll.h>
+ #include <asm/siginfo.h>
+@@ -84,6 +85,8 @@ repeat:
+ 	error = -EMFILE;
+ 	if (newfd >= current->signal->rlim[RLIMIT_NOFILE].rlim_cur)
+ 		goto out;
++	if (!vx_files_avail(1))
++		goto out;
+ 
+ 	error = expand_files(files, newfd);
+ 	if (error < 0)
+@@ -124,6 +127,7 @@ static int dupfd(struct file *file, unsi
+ 		FD_SET(fd, fdt->open_fds);
+ 		FD_CLR(fd, fdt->close_on_exec);
+ 		spin_unlock(&files->file_lock);
++		vx_openfd_inc(fd);
+ 		fd_install(fd, file);
+ 	} else {
+ 		spin_unlock(&files->file_lock);
+@@ -176,6 +180,9 @@ asmlinkage long sys_dup2(unsigned int ol
+ 
+ 	if (tofree)
+ 		filp_close(tofree, files);
++	else
++		vx_openfd_inc(newfd);	/* fd was unused */
++
+ 	err = newfd;
+ out:
+ 	return err;
+Index: linux-2.6.20/fs/file_table.c
+===================================================================
+--- linux-2.6.20.orig/fs/file_table.c
++++ linux-2.6.20/fs/file_table.c
+@@ -21,6 +21,8 @@
+ #include <linux/fsnotify.h>
+ #include <linux/sysctl.h>
+ #include <linux/percpu_counter.h>
++#include <linux/vs_limit.h>
++#include <linux/vs_context.h>
+ 
+ #include <asm/atomic.h>
+ 
+@@ -120,6 +122,8 @@ struct file *get_empty_filp(void)
+ 	f->f_gid = tsk->fsgid;
+ 	eventpoll_init_file(f);
+ 	/* f->f_version: 0 */
++	f->f_xid = vx_current_xid();
++	vx_files_inc(f);
+ 	return f;
+ 
+ over:
+@@ -175,6 +179,8 @@ void fastcall __fput(struct file *file)
+ 	if (file->f_mode & FMODE_WRITE)
+ 		put_write_access(inode);
+ 	put_pid(file->f_owner.pid);
++	vx_files_dec(file);
++	file->f_xid = 0;
+ 	file_kill(file);
+ 	file->f_path.dentry = NULL;
+ 	file->f_path.mnt = NULL;
+@@ -240,6 +246,8 @@ void put_filp(struct file *file)
+ {
+ 	if (atomic_dec_and_test(&file->f_count)) {
+ 		security_file_free(file);
++		vx_files_dec(file);
++		file->f_xid = 0;
+ 		file_kill(file);
+ 		file_free(file);
+ 	}
+Index: linux-2.6.20/fs/hfsplus/ioctl.c
+===================================================================
+--- linux-2.6.20.orig/fs/hfsplus/ioctl.c
++++ linux-2.6.20/fs/hfsplus/ioctl.c
+@@ -16,6 +16,7 @@
+ #include <linux/fs.h>
+ #include <linux/sched.h>
+ #include <linux/xattr.h>
++#include <linux/mount.h>
+ #include <asm/uaccess.h>
+ #include "hfsplus_fs.h"
+ 
+@@ -35,7 +36,8 @@ int hfsplus_ioctl(struct inode *inode, s
+ 			flags |= FS_NODUMP_FL; /* EXT2_NODUMP_FL */
+ 		return put_user(flags, (int __user *)arg);
+ 	case HFSPLUS_IOC_EXT2_SETFLAGS: {
+-		if (IS_RDONLY(inode))
++		if (IS_RDONLY(inode) ||
++			(filp && MNT_IS_RDONLY(filp->f_vfsmnt)))
+ 			return -EROFS;
+ 
+ 		if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+Index: linux-2.6.20/fs/inode.c
+===================================================================
+--- linux-2.6.20.orig/fs/inode.c
++++ linux-2.6.20/fs/inode.c
+@@ -115,6 +115,9 @@ static struct inode *alloc_inode(struct 
+ 		struct address_space * const mapping = &inode->i_data;
+ 
+ 		inode->i_sb = sb;
++
++		/* essential because of inode slab reuse */
++		inode->i_tag = 0;
+ 		inode->i_blkbits = sb->s_blocksize_bits;
+ 		inode->i_flags = 0;
+ 		atomic_set(&inode->i_count, 1);
+@@ -126,6 +129,9 @@ static struct inode *alloc_inode(struct 
+ 		inode->i_blocks = 0;
+ 		inode->i_bytes = 0;
+ 		inode->i_generation = 0;
++#ifdef CONFIG_QUOTACTL
++		inode->i_dqh = dqhget(sb->s_dqh);
++#endif
+ #ifdef CONFIG_QUOTA
+ 		memset(&inode->i_dquot, 0, sizeof(inode->i_dquot));
+ #endif
+@@ -172,6 +178,8 @@ void destroy_inode(struct inode *inode) 
+ {
+ 	BUG_ON(inode_has_buffers(inode));
+ 	security_inode_free(inode);
++	if (dqhash_valid(inode->i_dqh))
++		dqhput(inode->i_dqh);
+ 	if (inode->i_sb->s_op->destroy_inode)
+ 		inode->i_sb->s_op->destroy_inode(inode);
+ 	else
+@@ -233,6 +241,8 @@ void __iget(struct inode * inode)
+ 	inodes_stat.nr_unused--;
+ }
+ 
++EXPORT_SYMBOL_GPL(__iget);
++
+ /**
+  * clear_inode - clear an inode
+  * @inode: inode to clear
+@@ -1257,12 +1267,13 @@ EXPORT_SYMBOL(inode_needs_sync);
+  */
+ #ifdef CONFIG_QUOTA
+ 
+-void remove_dquot_ref(struct super_block *sb, int type,
++void remove_dquot_ref(struct dqhash *hash, int type,
+ 			struct list_head *tofree_head)
+ {
+ 	struct inode *inode;
++	struct super_block *sb = hash->dqh_sb;
+ 
+-	if (!sb->dq_op)
++	if (!hash->dqh_qop)
+ 		return;	/* nothing to do */
+ 	spin_lock(&inode_lock);	/* This lock is for inodes code */
+ 
+Index: linux-2.6.20/fs/ioctl.c
+===================================================================
+--- linux-2.6.20.orig/fs/ioctl.c
++++ linux-2.6.20/fs/ioctl.c
+@@ -12,10 +12,14 @@
+ #include <linux/fs.h>
+ #include <linux/security.h>
+ #include <linux/module.h>
++#include <linux/proc_fs.h>
++#include <linux/vserver/inode.h>
++#include <linux/vs_tag.h>
+ 
+ #include <asm/uaccess.h>
+ #include <asm/ioctls.h>
+ 
++
+ static long do_ioctl(struct file *filp, unsigned int cmd,
+ 		unsigned long arg)
+ {
+Index: linux-2.6.20/fs/ioprio.c
+===================================================================
+--- linux-2.6.20.orig/fs/ioprio.c
++++ linux-2.6.20/fs/ioprio.c
+@@ -25,6 +25,7 @@
+ #include <linux/capability.h>
+ #include <linux/syscalls.h>
+ #include <linux/security.h>
++#include <linux/vs_base.h>
+ 
+ static int set_task_ioprio(struct task_struct *task, int ioprio)
+ {
+@@ -109,7 +110,7 @@ asmlinkage long sys_ioprio_set(int which
+ 			if (!who)
+ 				user = current->user;
+ 			else
+-				user = find_user(who);
++				user = find_user(vx_current_xid(), who);
+ 
+ 			if (!user)
+ 				break;
+@@ -197,7 +198,7 @@ asmlinkage long sys_ioprio_get(int which
+ 			if (!who)
+ 				user = current->user;
+ 			else
+-				user = find_user(who);
++				user = find_user(vx_current_xid(), who);
+ 
+ 			if (!user)
+ 				break;
+Index: linux-2.6.20/fs/jffs2/dir.c
+===================================================================
+--- linux-2.6.20.orig/fs/jffs2/dir.c
++++ linux-2.6.20/fs/jffs2/dir.c
+@@ -37,6 +37,8 @@ static int jffs2_mknod (struct inode *,s
+ static int jffs2_rename (struct inode *, struct dentry *,
+                         struct inode *, struct dentry *);
+ 
++extern int jffs2_sync_flags(struct inode *);
++
+ const struct file_operations jffs2_dir_operations =
+ {
+ 	.read =		generic_read_dir,
+@@ -59,6 +61,7 @@ struct inode_operations jffs2_dir_inode_
+ 	.rename =	jffs2_rename,
+ 	.permission =	jffs2_permission,
+ 	.setattr =	jffs2_setattr,
++	.sync_flags =	jffs2_sync_flags,
+ 	.setxattr =	jffs2_setxattr,
+ 	.getxattr =	jffs2_getxattr,
+ 	.listxattr =	jffs2_listxattr,
+Index: linux-2.6.20/fs/jffs2/file.c
+===================================================================
+--- linux-2.6.20.orig/fs/jffs2/file.c
++++ linux-2.6.20/fs/jffs2/file.c
+@@ -27,6 +27,9 @@ static int jffs2_prepare_write (struct f
+ 				unsigned start, unsigned end);
+ static int jffs2_readpage (struct file *filp, struct page *pg);
+ 
++extern int jffs2_sync_flags(struct inode *);
++
++
+ int jffs2_fsync(struct file *filp, struct dentry *dentry, int datasync)
+ {
+ 	struct inode *inode = dentry->d_inode;
+@@ -58,6 +61,7 @@ struct inode_operations jffs2_file_inode
+ {
+ 	.permission =	jffs2_permission,
+ 	.setattr =	jffs2_setattr,
++	.sync_flags =	jffs2_sync_flags,
+ 	.setxattr =	jffs2_setxattr,
+ 	.getxattr =	jffs2_getxattr,
+ 	.listxattr =	jffs2_listxattr,
+@@ -159,12 +163,14 @@ static int jffs2_prepare_write (struct f
+ 		ri.mode = cpu_to_jemode(inode->i_mode);
+ 		ri.uid = cpu_to_je16(inode->i_uid);
+ 		ri.gid = cpu_to_je16(inode->i_gid);
++		ri.tag = cpu_to_je16(inode->i_tag);
+ 		ri.isize = cpu_to_je32(max((uint32_t)inode->i_size, pageofs));
+ 		ri.atime = ri.ctime = ri.mtime = cpu_to_je32(get_seconds());
+ 		ri.offset = cpu_to_je32(inode->i_size);
+ 		ri.dsize = cpu_to_je32(pageofs - inode->i_size);
+ 		ri.csize = cpu_to_je32(0);
+ 		ri.compr = JFFS2_COMPR_ZERO;
++		ri.flags = cpu_to_je16(f->flags);
+ 		ri.node_crc = cpu_to_je32(crc32(0, &ri, sizeof(ri)-8));
+ 		ri.data_crc = cpu_to_je32(0);
+ 
+@@ -250,8 +256,10 @@ static int jffs2_commit_write (struct fi
+ 	ri->mode = cpu_to_jemode(inode->i_mode);
+ 	ri->uid = cpu_to_je16(inode->i_uid);
+ 	ri->gid = cpu_to_je16(inode->i_gid);
++	ri->tag = cpu_to_je16(inode->i_tag);
+ 	ri->isize = cpu_to_je32((uint32_t)inode->i_size);
+ 	ri->atime = ri->ctime = ri->mtime = cpu_to_je32(get_seconds());
++	ri->flags = cpu_to_je16(f->flags);
+ 
+ 	/* In 2.4, it was already kmapped by generic_file_write(). Doesn't
+ 	   hurt to do it again. The alternative is ifdefs, which are ugly. */
+Index: linux-2.6.20/fs/jffs2/fs.c
+===================================================================
+--- linux-2.6.20.orig/fs/jffs2/fs.c
++++ linux-2.6.20/fs/jffs2/fs.c
+@@ -22,6 +22,7 @@
+ #include <linux/vmalloc.h>
+ #include <linux/vfs.h>
+ #include <linux/crc32.h>
++#include <linux/vs_tag.h>
+ #include "nodelist.h"
+ 
+ static int jffs2_flash_setup(struct jffs2_sb_info *c);
+@@ -99,6 +100,7 @@ static int jffs2_do_setattr (struct inod
+ 
+ 	ri->uid = cpu_to_je16((ivalid & ATTR_UID)?iattr->ia_uid:inode->i_uid);
+ 	ri->gid = cpu_to_je16((ivalid & ATTR_GID)?iattr->ia_gid:inode->i_gid);
++	ri->tag = cpu_to_je16((ivalid & ATTR_TAG)?iattr->ia_tag:inode->i_tag);
+ 
+ 	if (ivalid & ATTR_MODE)
+ 		if (iattr->ia_mode & S_ISGID &&
+@@ -118,6 +120,8 @@ static int jffs2_do_setattr (struct inod
+ 	ri->offset = cpu_to_je32(0);
+ 	ri->csize = ri->dsize = cpu_to_je32(mdatalen);
+ 	ri->compr = JFFS2_COMPR_NONE;
++	ri->flags = cpu_to_je16(f->flags);
++
+ 	if (ivalid & ATTR_SIZE && inode->i_size < iattr->ia_size) {
+ 		/* It's an extension. Make it a hole node */
+ 		ri->compr = JFFS2_COMPR_ZERO;
+@@ -147,6 +151,7 @@ static int jffs2_do_setattr (struct inod
+ 	inode->i_mode = jemode_to_cpu(ri->mode);
+ 	inode->i_uid = je16_to_cpu(ri->uid);
+ 	inode->i_gid = je16_to_cpu(ri->gid);
++	inode->i_tag = je16_to_cpu(ri->tag);
+ 
+ 
+ 	old_metadata = f->metadata;
+@@ -181,6 +186,48 @@ static int jffs2_do_setattr (struct inod
+ 	return 0;
+ }
+ 
++void jffs2_set_inode_flags(struct inode *inode)
++{
++	struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode);
++	unsigned int flags = f->flags;
++
++	inode->i_flags &= ~(JFFS2_INO_FLAG_IMMUTABLE |
++		JFFS2_INO_FLAG_IUNLINK | JFFS2_INO_FLAG_BARRIER);
++
++	if (flags & JFFS2_INO_FLAG_IMMUTABLE)
++		inode->i_flags |= S_IMMUTABLE;
++	if (flags & JFFS2_INO_FLAG_IUNLINK)
++		inode->i_flags |= S_IUNLINK;
++	if (flags & JFFS2_INO_FLAG_BARRIER)
++		inode->i_flags |= S_BARRIER;
++}
++
++int jffs2_sync_flags(struct inode *inode)
++{
++	struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode);
++	unsigned int oldflags, newflags;
++
++	oldflags = f->flags;
++	newflags = oldflags & ~(JFFS2_INO_FLAG_IMMUTABLE |
++		JFFS2_INO_FLAG_IUNLINK | JFFS2_INO_FLAG_BARRIER);
++
++	if (IS_IMMUTABLE(inode))
++		newflags |= JFFS2_INO_FLAG_IMMUTABLE;
++	if (IS_IUNLINK(inode))
++		newflags |= JFFS2_INO_FLAG_IUNLINK;
++	if (IS_BARRIER(inode))
++		newflags |= JFFS2_INO_FLAG_BARRIER;
++
++	if (oldflags ^ newflags) {
++		f->flags = newflags;
++		inode->i_ctime = CURRENT_TIME;
++		/* strange requirement, see jffs2_dirty_inode() */
++		inode->i_state |= I_DIRTY_DATASYNC;
++		mark_inode_dirty(inode);
++	}
++	return 0;
++}
++
+ int jffs2_setattr(struct dentry *dentry, struct iattr *iattr)
+ {
+ 	int rc;
+@@ -256,6 +303,7 @@ void jffs2_read_inode (struct inode *ino
+ 	inode->i_mode = jemode_to_cpu(latest_node.mode);
+ 	inode->i_uid = je16_to_cpu(latest_node.uid);
+ 	inode->i_gid = je16_to_cpu(latest_node.gid);
++	inode->i_tag = je16_to_cpu(latest_node.tag);
+ 	inode->i_size = je32_to_cpu(latest_node.isize);
+ 	inode->i_atime = ITIME(je32_to_cpu(latest_node.atime));
+ 	inode->i_mtime = ITIME(je32_to_cpu(latest_node.mtime));
+@@ -287,6 +335,7 @@ void jffs2_read_inode (struct inode *ino
+ 
+ 		inode->i_op = &jffs2_dir_inode_operations;
+ 		inode->i_fop = &jffs2_dir_operations;
++		f->flags = je16_to_cpu(latest_node.flags);
+ 		break;
+ 	}
+ 	case S_IFREG:
+@@ -294,6 +343,7 @@ void jffs2_read_inode (struct inode *ino
+ 		inode->i_fop = &jffs2_file_operations;
+ 		inode->i_mapping->a_ops = &jffs2_file_address_operations;
+ 		inode->i_mapping->nrpages = 0;
++		f->flags = je16_to_cpu(latest_node.flags);
+ 		break;
+ 
+ 	case S_IFBLK:
+@@ -330,7 +380,7 @@ void jffs2_read_inode (struct inode *ino
+ 	default:
+ 		printk(KERN_WARNING "jffs2_read_inode(): Bogus imode %o for ino %lu\n", inode->i_mode, (unsigned long)inode->i_ino);
+ 	}
+-
++	jffs2_set_inode_flags(inode);
+ 	up(&f->sem);
+ 
+ 	D1(printk(KERN_DEBUG "jffs2_read_inode() returning\n"));
+@@ -347,10 +397,11 @@ void jffs2_dirty_inode(struct inode *ino
+ 
+ 	D1(printk(KERN_DEBUG "jffs2_dirty_inode() calling setattr() for ino #%lu\n", inode->i_ino));
+ 
+-	iattr.ia_valid = ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_MTIME|ATTR_CTIME;
++	iattr.ia_valid = ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_MTIME|ATTR_CTIME|ATTR_TAG;
+ 	iattr.ia_mode = inode->i_mode;
+ 	iattr.ia_uid = inode->i_uid;
+ 	iattr.ia_gid = inode->i_gid;
++	iattr.ia_tag = inode->i_tag;
+ 	iattr.ia_atime = inode->i_atime;
+ 	iattr.ia_mtime = inode->i_mtime;
+ 	iattr.ia_ctime = inode->i_ctime;
+@@ -424,6 +475,7 @@ struct inode *jffs2_new_inode (struct in
+ 
+ 	memset(ri, 0, sizeof(*ri));
+ 	/* Set OS-specific defaults for new inodes */
++	ri->tag = cpu_to_je16(dx_current_tag());
+ 	ri->uid = cpu_to_je16(current->fsuid);
+ 
+ 	if (dir_i->i_mode & S_ISGID) {
+@@ -445,14 +497,16 @@ struct inode *jffs2_new_inode (struct in
+ 	inode->i_mode = jemode_to_cpu(ri->mode);
+ 	inode->i_gid = je16_to_cpu(ri->gid);
+ 	inode->i_uid = je16_to_cpu(ri->uid);
++	inode->i_tag = je16_to_cpu(ri->tag);
+ 	inode->i_atime = inode->i_ctime = inode->i_mtime = CURRENT_TIME_SEC;
+ 	ri->atime = ri->mtime = ri->ctime = cpu_to_je32(I_SEC(inode->i_mtime));
+ 
+ 	inode->i_blocks = 0;
+ 	inode->i_size = 0;
+ 
++	f->flags = je16_to_cpu(ri->flags);
++	jffs2_set_inode_flags(inode);
+ 	insert_inode_hash(inode);
+-
+ 	return inode;
+ }
+ 
+Index: linux-2.6.20/fs/jffs2/gc.c
+===================================================================
+--- linux-2.6.20.orig/fs/jffs2/gc.c
++++ linux-2.6.20/fs/jffs2/gc.c
+@@ -736,6 +736,7 @@ static int jffs2_garbage_collect_metadat
+ 	ri.mode = cpu_to_jemode(JFFS2_F_I_MODE(f));
+ 	ri.uid = cpu_to_je16(JFFS2_F_I_UID(f));
+ 	ri.gid = cpu_to_je16(JFFS2_F_I_GID(f));
++	ri.tag = cpu_to_je16(JFFS2_F_I_TAG(f));
+ 	ri.isize = cpu_to_je32(ilen);
+ 	ri.atime = cpu_to_je32(JFFS2_F_I_ATIME(f));
+ 	ri.ctime = cpu_to_je32(JFFS2_F_I_CTIME(f));
+@@ -999,6 +1000,7 @@ static int jffs2_garbage_collect_hole(st
+ 	ri.mode = cpu_to_jemode(JFFS2_F_I_MODE(f));
+ 	ri.uid = cpu_to_je16(JFFS2_F_I_UID(f));
+ 	ri.gid = cpu_to_je16(JFFS2_F_I_GID(f));
++	ri.tag = cpu_to_je16(JFFS2_F_I_TAG(f));
+ 	ri.isize = cpu_to_je32(ilen);
+ 	ri.atime = cpu_to_je32(JFFS2_F_I_ATIME(f));
+ 	ri.ctime = cpu_to_je32(JFFS2_F_I_CTIME(f));
+@@ -1257,6 +1259,7 @@ static int jffs2_garbage_collect_dnode(s
+ 		ri.mode = cpu_to_jemode(JFFS2_F_I_MODE(f));
+ 		ri.uid = cpu_to_je16(JFFS2_F_I_UID(f));
+ 		ri.gid = cpu_to_je16(JFFS2_F_I_GID(f));
++		ri.tag = cpu_to_je16(JFFS2_F_I_TAG(f));
+ 		ri.isize = cpu_to_je32(JFFS2_F_I_SIZE(f));
+ 		ri.atime = cpu_to_je32(JFFS2_F_I_ATIME(f));
+ 		ri.ctime = cpu_to_je32(JFFS2_F_I_CTIME(f));
+Index: linux-2.6.20/fs/jffs2/ioctl.c
+===================================================================
+--- linux-2.6.20.orig/fs/jffs2/ioctl.c
++++ linux-2.6.20/fs/jffs2/ioctl.c
+@@ -12,12 +12,67 @@
+  */
+ 
+ #include <linux/fs.h>
++#include <linux/types.h>
++#include <linux/mount.h>
++#include <linux/jffs2.h>
++#include <linux/uaccess.h>
++#include <linux/vs_base.h>
++#include "jffs2_fs_sb.h"
++#include "jffs2_fs_i.h"
++#include "acl.h"
++#include "os-linux.h"
++
++extern void jffs2_set_inode_flags(struct inode *);
+ 
+ int jffs2_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
+ 		unsigned long arg)
+ {
+-	/* Later, this will provide for lsattr.jffs2 and chattr.jffs2, which
+-	   will include compression support etc. */
+-	return -ENOTTY;
++	struct jffs2_inode_info *j = JFFS2_INODE_INFO(inode);
++	unsigned int flags, oldflags, newflags;
++
++	switch (cmd) {
++	case JFFS2_IOC_GETFLAGS:
++		flags = j->flags & JFFS2_USER_VISIBLE;
++		return put_user(flags, (int __user *) arg);
++
++	case JFFS2_IOC_SETFLAGS:
++		if (IS_RDONLY(inode) ||
++			(filp && MNT_IS_RDONLY(filp->f_vfsmnt)))
++			return -EROFS;
++
++		if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
++			return -EACCES;
++
++		if (get_user(flags, (int __user *) arg))
++			return -EFAULT;
++
++		oldflags = j->flags;
++		newflags = flags & JFFS2_USER_MODIFIABLE;
++		newflags |= oldflags & ~JFFS2_USER_MODIFIABLE;
++
++		/*
++		 * The IMMUTABLE flags can only be changed by
++		 * the relevant capability.
++		 */
++		if (((oldflags ^ newflags) &
++			(JFFS2_INO_FLAG_IMMUTABLE | JFFS2_INO_FLAG_IUNLINK)) ||
++			(oldflags & JFFS2_INO_FLAG_IMMUTABLE)) {
++			if (!capable(CAP_LINUX_IMMUTABLE))
++				return -EPERM;
++		}
++
++		if (oldflags ^ newflags) {
++			j->flags = newflags;
++			inode->i_ctime = CURRENT_TIME;
++			/* strange requirement, see jffs2_dirty_inode() */
++			inode->i_state |= I_DIRTY_DATASYNC;
++			mark_inode_dirty(inode);
++			jffs2_set_inode_flags(inode);
++		}
++		return 0;
++
++	default:
++		return -ENOTTY;
++	}
+ }
+ 
+Index: linux-2.6.20/fs/jffs2/jffs2_fs_sb.h
+===================================================================
+--- linux-2.6.20.orig/fs/jffs2/jffs2_fs_sb.h
++++ linux-2.6.20/fs/jffs2/jffs2_fs_sb.h
+@@ -30,6 +30,7 @@ struct jffs2_sb_info {
+ 	uint32_t checked_ino;
+ 
+ 	unsigned int flags;
++	unsigned int s_mount_opt;
+ 
+ 	struct task_struct *gc_task;	/* GC task struct */
+ 	struct completion gc_thread_start; /* GC thread start completion */
+Index: linux-2.6.20/fs/jffs2/nodelist.h
+===================================================================
+--- linux-2.6.20.orig/fs/jffs2/nodelist.h
++++ linux-2.6.20/fs/jffs2/nodelist.h
+@@ -46,19 +46,19 @@
+ #elif defined(JFFS2_BIG_ENDIAN)
+ #define cpu_to_je16(x) ((jint16_t){cpu_to_be16(x)})
+ #define cpu_to_je32(x) ((jint32_t){cpu_to_be32(x)})
+-#define cpu_to_jemode(x) ((jmode_t){cpu_to_be32(os_to_jffs2_mode(x))})
++#define cpu_to_jemode(x) ((jmode_t){cpu_to_be16(os_to_jffs2_mode(x))})
+ 
+ #define je16_to_cpu(x) (be16_to_cpu(x.v16))
+ #define je32_to_cpu(x) (be32_to_cpu(x.v32))
+-#define jemode_to_cpu(x) (be32_to_cpu(jffs2_to_os_mode((x).m)))
++#define jemode_to_cpu(x) (be16_to_cpu(jffs2_to_os_mode((x).m)))
+ #elif defined(JFFS2_LITTLE_ENDIAN)
+ #define cpu_to_je16(x) ((jint16_t){cpu_to_le16(x)})
+ #define cpu_to_je32(x) ((jint32_t){cpu_to_le32(x)})
+-#define cpu_to_jemode(x) ((jmode_t){cpu_to_le32(os_to_jffs2_mode(x))})
++#define cpu_to_jemode(x) ((jmode_t){cpu_to_le16(os_to_jffs2_mode(x))})
+ 
+ #define je16_to_cpu(x) (le16_to_cpu(x.v16))
+ #define je32_to_cpu(x) (le32_to_cpu(x.v32))
+-#define jemode_to_cpu(x) (le32_to_cpu(jffs2_to_os_mode((x).m)))
++#define jemode_to_cpu(x) (le16_to_cpu(jffs2_to_os_mode((x).m)))
+ #else
+ #error wibble
+ #endif
+Index: linux-2.6.20/fs/jffs2/os-linux.h
+===================================================================
+--- linux-2.6.20.orig/fs/jffs2/os-linux.h
++++ linux-2.6.20/fs/jffs2/os-linux.h
+@@ -31,6 +31,7 @@ struct kvec;
+ #define JFFS2_F_I_MODE(f) (OFNI_EDONI_2SFFJ(f)->i_mode)
+ #define JFFS2_F_I_UID(f) (OFNI_EDONI_2SFFJ(f)->i_uid)
+ #define JFFS2_F_I_GID(f) (OFNI_EDONI_2SFFJ(f)->i_gid)
++#define JFFS2_F_I_TAG(f) (OFNI_EDONI_2SFFJ(f)->i_tag)
+ #define JFFS2_F_I_RDEV(f) (OFNI_EDONI_2SFFJ(f)->i_rdev)
+ 
+ #define ITIME(sec) ((struct timespec){sec, 0})
+@@ -200,6 +201,9 @@ int jffs2_flash_direct_writev(struct jff
+ int jffs2_flash_direct_write(struct jffs2_sb_info *c, loff_t ofs, size_t len,
+ 			size_t *retlen, const u_char *buf);
+ 
++#define JFFS2_IOC_GETFLAGS		FS_IOC_GETFLAGS
++#define JFFS2_IOC_SETFLAGS		FS_IOC_SETFLAGS
++
+ #endif /* __JFFS2_OS_LINUX_H__ */
+ 
+ 
+Index: linux-2.6.20/fs/jffs2/readinode.c
+===================================================================
+--- linux-2.6.20.orig/fs/jffs2/readinode.c
++++ linux-2.6.20/fs/jffs2/readinode.c
+@@ -759,6 +759,8 @@ static int jffs2_do_read_inode_internal(
+ 		latest_node->isize = cpu_to_je32(0);
+ 		latest_node->gid = cpu_to_je16(0);
+ 		latest_node->uid = cpu_to_je16(0);
++		latest_node->tag = cpu_to_je16(0);
++		latest_node->flags = cpu_to_je16(0);
+ 		if (f->inocache->state == INO_STATE_READING)
+ 			jffs2_set_inocache_state(c, f->inocache, INO_STATE_PRESENT);
+ 		return 0;
+Index: linux-2.6.20/fs/jffs2/super.c
+===================================================================
+--- linux-2.6.20.orig/fs/jffs2/super.c
++++ linux-2.6.20/fs/jffs2/super.c
+@@ -24,6 +24,7 @@
+ #include <linux/mtd/mtd.h>
+ #include <linux/ctype.h>
+ #include <linux/namei.h>
++#include <linux/parser.h>
+ #include "compr.h"
+ #include "nodelist.h"
+ 
+@@ -111,6 +112,58 @@ static int jffs2_sb_set(struct super_blo
+ 	return 0;
+ }
+ 
++enum {
++	Opt_tag, Opt_notag, Opt_tagid, Opt_ignore, Opt_err
++};
++
++static match_table_t tokens = {
++	{Opt_tag, "tag"},
++	{Opt_notag, "notag"},
++	{Opt_tagid, "tagid=%u"},
++	{Opt_tag, "tagxid"},
++	{Opt_err, NULL}
++};
++
++static int parse_options (char * options,
++			  struct jffs2_sb_info *sbi)
++{
++	char * p;
++	substring_t args[MAX_OPT_ARGS];
++
++	if (!options)
++		return 1;
++
++	while ((p = strsep (&options, ",")) != NULL) {
++		int token;
++		if (!*p)
++			continue;
++
++		token = match_token(p, tokens, args);
++		switch (token) {
++#ifndef CONFIG_TAGGING_NONE
++		case Opt_tag:
++			set_opt (sbi->s_mount_opt, TAGGED);
++			break;
++		case Opt_notag:
++			clear_opt (sbi->s_mount_opt, TAGGED);
++			break;
++#endif
++#ifdef CONFIG_PROPAGATE
++		case Opt_tagid:
++			/* use args[0] */
++			set_opt (sbi->s_mount_opt, TAGGED);
++			break;
++#endif
++		case Opt_ignore:
++			break;
++		default:
++			return 0;
++		}
++	}
++	return 1;
++}
++
++
+ static int jffs2_get_sb_mtd(struct file_system_type *fs_type,
+ 			    int flags, const char *dev_name,
+ 			    void *data, struct mtd_info *mtd,
+@@ -156,25 +209,32 @@ static int jffs2_get_sb_mtd(struct file_
+ #ifdef CONFIG_JFFS2_FS_POSIX_ACL
+ 	sb->s_flags |= MS_POSIXACL;
+ #endif
+-	ret = jffs2_do_fill_super(sb, data, flags & MS_SILENT ? 1 : 0);
++	ret = -EINVAL;
++	if (!parse_options ((char *) data, c))
++		goto failed_mount;
+ 
+-	if (ret) {
+-		/* Failure case... */
+-		up_write(&sb->s_umount);
+-		deactivate_super(sb);
+-		return ret;
+-	}
++	ret = jffs2_do_fill_super(sb, data, flags & MS_SILENT ? 1 : 0);
++	if (ret)
++		goto failed_mount;
+ 
++	if (c->s_mount_opt & JFFS2_MOUNT_TAGGED)
++		sb->s_flags |= MS_TAGGED;
+ 	sb->s_flags |= MS_ACTIVE;
+ 	return simple_set_mnt(mnt, sb);
+ 
+ out_error:
+ 	ret = PTR_ERR(sb);
+- out_put:
++out_put:
+ 	kfree(c);
+ 	put_mtd_device(mtd);
+ 
+ 	return ret;
++
++failed_mount:
++	/* Failure case... */
++	up_write(&sb->s_umount);
++	deactivate_super(sb);
++	return ret;
+ }
+ 
+ static int jffs2_get_sb_mtdnr(struct file_system_type *fs_type,
+Index: linux-2.6.20/fs/jffs2/write.c
+===================================================================
+--- linux-2.6.20.orig/fs/jffs2/write.c
++++ linux-2.6.20/fs/jffs2/write.c
+@@ -46,6 +46,7 @@ int jffs2_do_new_inode(struct jffs2_sb_i
+ 	ri->totlen = cpu_to_je32(PAD(sizeof(*ri)));
+ 	ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4));
+ 	ri->mode = cpu_to_jemode(mode);
++	ri->flags = cpu_to_je16(0);
+ 
+ 	f->highest_version = 1;
+ 	ri->version = cpu_to_je32(f->highest_version);
+Index: linux-2.6.20/fs/jfs/acl.c
+===================================================================
+--- linux-2.6.20.orig/fs/jfs/acl.c
++++ linux-2.6.20/fs/jfs/acl.c
+@@ -232,7 +232,8 @@ int jfs_setattr(struct dentry *dentry, s
+ 		return rc;
+ 
+ 	if ((iattr->ia_valid & ATTR_UID && iattr->ia_uid != inode->i_uid) ||
+-	    (iattr->ia_valid & ATTR_GID && iattr->ia_gid != inode->i_gid)) {
++	    (iattr->ia_valid & ATTR_GID && iattr->ia_gid != inode->i_gid) ||
++	    (iattr->ia_valid & ATTR_TAG && iattr->ia_tag != inode->i_tag)) {
+ 		if (DQUOT_TRANSFER(inode, iattr))
+ 			return -EDQUOT;
+ 	}
+Index: linux-2.6.20/fs/jfs/file.c
+===================================================================
+--- linux-2.6.20.orig/fs/jfs/file.c
++++ linux-2.6.20/fs/jfs/file.c
+@@ -98,6 +98,7 @@ struct inode_operations jfs_file_inode_o
+ 	.setattr	= jfs_setattr,
+ 	.permission	= jfs_permission,
+ #endif
++	.sync_flags	= jfs_sync_flags,
+ };
+ 
+ const struct file_operations jfs_file_operations = {
+@@ -109,6 +110,7 @@ const struct file_operations jfs_file_op
+ 	.aio_write	= generic_file_aio_write,
+ 	.mmap		= generic_file_mmap,
+ 	.sendfile	= generic_file_sendfile,
++	.sendpage	= generic_file_sendpage,
+ 	.splice_read	= generic_file_splice_read,
+ 	.splice_write	= generic_file_splice_write,
+ 	.fsync		= jfs_fsync,
+Index: linux-2.6.20/fs/jfs/inode.c
+===================================================================
+--- linux-2.6.20.orig/fs/jfs/inode.c
++++ linux-2.6.20/fs/jfs/inode.c
+@@ -22,6 +22,7 @@
+ #include <linux/buffer_head.h>
+ #include <linux/pagemap.h>
+ #include <linux/quotaops.h>
++#include <linux/vs_dlimit.h>
+ #include "jfs_incore.h"
+ #include "jfs_inode.h"
+ #include "jfs_filsys.h"
+@@ -144,6 +145,7 @@ void jfs_delete_inode(struct inode *inod
+ 		DQUOT_INIT(inode);
+ 		DQUOT_FREE_INODE(inode);
+ 		DQUOT_DROP(inode);
++		DLIMIT_FREE_INODE(inode);
+ 	}
+ 
+ 	clear_inode(inode);
+Index: linux-2.6.20/fs/jfs/ioctl.c
+===================================================================
+--- linux-2.6.20.orig/fs/jfs/ioctl.c
++++ linux-2.6.20/fs/jfs/ioctl.c
+@@ -10,6 +10,7 @@
+ #include <linux/capability.h>
+ #include <linux/time.h>
+ #include <linux/sched.h>
++#include <linux/mount.h>
+ #include <asm/current.h>
+ #include <asm/uaccess.h>
+ 
+@@ -65,7 +66,8 @@ int jfs_ioctl(struct inode * inode, stru
+ 	case JFS_IOC_SETFLAGS: {
+ 		unsigned int oldflags;
+ 
+-		if (IS_RDONLY(inode))
++		if (IS_RDONLY(inode) ||
++			(filp && MNT_IS_RDONLY(filp->f_vfsmnt)))
+ 			return -EROFS;
+ 
+ 		if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+@@ -85,8 +87,8 @@ int jfs_ioctl(struct inode * inode, stru
+ 		 * the relevant capability.
+ 		 */
+ 		if ((oldflags & JFS_IMMUTABLE_FL) ||
+-			((flags ^ oldflags) &
+-			(JFS_APPEND_FL | JFS_IMMUTABLE_FL))) {
++			((flags ^ oldflags) & (JFS_APPEND_FL |
++			JFS_IMMUTABLE_FL | JFS_IUNLINK_FL))) {
+ 			if (!capable(CAP_LINUX_IMMUTABLE))
+ 				return -EPERM;
+ 		}
+Index: linux-2.6.20/fs/jfs/jfs_dinode.h
+===================================================================
+--- linux-2.6.20.orig/fs/jfs/jfs_dinode.h
++++ linux-2.6.20/fs/jfs/jfs_dinode.h
+@@ -162,9 +162,12 @@ struct dinode {
+ #define JFS_APPEND_FL		0x01000000 /* writes to file may only append */
+ #define JFS_IMMUTABLE_FL	0x02000000 /* Immutable file */
+ 
+-#define JFS_FL_USER_VISIBLE	0x03F80000
++#define JFS_BARRIER_FL		0x04000000 /* Barrier for chroot() */
++#define JFS_IUNLINK_FL		0x08000000 /* Immutable unlink */
++
++#define JFS_FL_USER_VISIBLE	0x0FF80000
+ #define JFS_FL_USER_MODIFIABLE	0x03F80000
+-#define JFS_FL_INHERIT		0x03C80000
++#define JFS_FL_INHERIT		0x0BC80000
+ 
+ /* These are identical to EXT[23]_IOC_GETFLAGS/SETFLAGS */
+ #define JFS_IOC_GETFLAGS	_IOR('f', 1, long)
+Index: linux-2.6.20/fs/jfs/jfs_dtree.c
+===================================================================
+--- linux-2.6.20.orig/fs/jfs/jfs_dtree.c
++++ linux-2.6.20/fs/jfs/jfs_dtree.c
+@@ -102,6 +102,7 @@
+ 
+ #include <linux/fs.h>
+ #include <linux/quotaops.h>
++#include <linux/vs_dlimit.h>
+ #include "jfs_incore.h"
+ #include "jfs_superblock.h"
+ #include "jfs_filsys.h"
+@@ -383,10 +384,10 @@ static u32 add_index(tid_t tid, struct i
+ 		 */
+ 		if (DQUOT_ALLOC_BLOCK(ip, sbi->nbperpage))
+ 			goto clean_up;
+-		if (dbAlloc(ip, 0, sbi->nbperpage, &xaddr)) {
+-			DQUOT_FREE_BLOCK(ip, sbi->nbperpage);
+-			goto clean_up;
+-		}
++		if (DLIMIT_ALLOC_BLOCK(ip, sbi->nbperpage))
++			goto clean_up_dquot;
++		if (dbAlloc(ip, 0, sbi->nbperpage, &xaddr))
++			goto clean_up_dlimit;
+ 
+ 		/*
+ 		 * Save the table, we're going to overwrite it with the
+@@ -479,6 +480,12 @@ static u32 add_index(tid_t tid, struct i
+ 
+ 	return index;
+ 
++      clean_up_dlimit:
++	DLIMIT_FREE_BLOCK(ip, sbi->nbperpage);
++
++      clean_up_dquot:
++	DQUOT_FREE_BLOCK(ip, sbi->nbperpage);
++
+       clean_up:
+ 
+ 	jfs_ip->next_index--;
+@@ -952,6 +959,7 @@ static int dtSplitUp(tid_t tid,
+ 	struct tlock *tlck;
+ 	struct lv *lv;
+ 	int quota_allocation = 0;
++	int dlimit_allocation = 0;
+ 
+ 	/* get split page */
+ 	smp = split->mp;
+@@ -1036,6 +1044,12 @@ static int dtSplitUp(tid_t tid,
+ 		}
+ 		quota_allocation += n;
+ 
++		if (DLIMIT_ALLOC_BLOCK(ip, n)) {
++			rc = -ENOSPC;
++			goto extendOut;
++		}
++		dlimit_allocation += n;
++
+ 		if ((rc = dbReAlloc(sbi->ipbmap, xaddr, (s64) xlen,
+ 				    (s64) n, &nxaddr)))
+ 			goto extendOut;
+@@ -1309,6 +1323,9 @@ static int dtSplitUp(tid_t tid,
+       freeKeyName:
+ 	kfree(key.name);
+ 
++	/* Rollback dlimit allocation */
++	if (rc && dlimit_allocation)
++		DLIMIT_FREE_BLOCK(ip, dlimit_allocation);
+ 	/* Rollback quota allocation */
+ 	if (rc && quota_allocation)
+ 		DQUOT_FREE_BLOCK(ip, quota_allocation);
+@@ -1376,6 +1393,12 @@ static int dtSplitPage(tid_t tid, struct
+ 		release_metapage(rmp);
+ 		return -EDQUOT;
+ 	}
++	/* Allocate blocks to dlimit. */
++	if (DLIMIT_ALLOC_BLOCK(ip, lengthPXD(pxd))) {
++		DQUOT_FREE_BLOCK(ip, lengthPXD(pxd));
++		release_metapage(rmp);
++		return -ENOSPC;
++	}
+ 
+ 	jfs_info("dtSplitPage: ip:0x%p smp:0x%p rmp:0x%p", ip, smp, rmp);
+ 
+@@ -1926,6 +1949,12 @@ static int dtSplitRoot(tid_t tid,
+ 		release_metapage(rmp);
+ 		return -EDQUOT;
+ 	}
++	/* Allocate blocks to dlimit. */
++	if (DLIMIT_ALLOC_BLOCK(ip, lengthPXD(pxd))) {
++		DQUOT_FREE_BLOCK(ip, lengthPXD(pxd));
++		release_metapage(rmp);
++		return -ENOSPC;
++	}
+ 
+ 	BT_MARK_DIRTY(rmp, ip);
+ 	/*
+@@ -2292,6 +2321,8 @@ static int dtDeleteUp(tid_t tid, struct 
+ 
+ 	xlen = lengthPXD(&fp->header.self);
+ 
++	/* Free dlimit allocation. */
++	DLIMIT_FREE_BLOCK(ip, xlen);
+ 	/* Free quota allocation. */
+ 	DQUOT_FREE_BLOCK(ip, xlen);
+ 
+@@ -2368,6 +2399,8 @@ static int dtDeleteUp(tid_t tid, struct 
+ 
+ 				xlen = lengthPXD(&p->header.self);
+ 
++				/* Free dlimit allocation */
++				DLIMIT_FREE_BLOCK(ip, xlen);
+ 				/* Free quota allocation */
+ 				DQUOT_FREE_BLOCK(ip, xlen);
+ 
+Index: linux-2.6.20/fs/jfs/jfs_extent.c
+===================================================================
+--- linux-2.6.20.orig/fs/jfs/jfs_extent.c
++++ linux-2.6.20/fs/jfs/jfs_extent.c
+@@ -18,6 +18,7 @@
+ 
+ #include <linux/fs.h>
+ #include <linux/quotaops.h>
++#include <linux/vs_dlimit.h>
+ #include "jfs_incore.h"
+ #include "jfs_inode.h"
+ #include "jfs_superblock.h"
+@@ -147,6 +148,14 @@ extAlloc(struct inode *ip, s64 xlen, s64
+ 		return -EDQUOT;
+ 	}
+ 
++	/* Allocate blocks to dlimit. */
++	if (DLIMIT_ALLOC_BLOCK(ip, nxlen)) {
++		DQUOT_FREE_BLOCK(ip, nxlen);
++		dbFree(ip, nxaddr, (s64) nxlen);
++		mutex_unlock(&JFS_IP(ip)->commit_mutex);
++		return -ENOSPC;
++	}
++
+ 	/* determine the value of the extent flag */
+ 	xflag = abnr ? XAD_NOTRECORDED : 0;
+ 
+@@ -164,6 +173,7 @@ extAlloc(struct inode *ip, s64 xlen, s64
+ 	 */
+ 	if (rc) {
+ 		dbFree(ip, nxaddr, nxlen);
++		DLIMIT_FREE_BLOCK(ip, nxlen);
+ 		DQUOT_FREE_BLOCK(ip, nxlen);
+ 		mutex_unlock(&JFS_IP(ip)->commit_mutex);
+ 		return (rc);
+@@ -261,6 +271,13 @@ int extRealloc(struct inode *ip, s64 nxl
+ 		mutex_unlock(&JFS_IP(ip)->commit_mutex);
+ 		return -EDQUOT;
+ 	}
++	/* Allocate blocks to dlimit. */
++	if (DLIMIT_ALLOC_BLOCK(ip, nxlen)) {
++		DQUOT_FREE_BLOCK(ip, nxlen);
++		dbFree(ip, nxaddr, (s64) nxlen);
++		up(&JFS_IP(ip)->commit_sem);
++		return -ENOSPC;
++	}
+ 
+ 	delta = nxlen - xlen;
+ 
+@@ -297,6 +314,7 @@ int extRealloc(struct inode *ip, s64 nxl
+ 		/* extend the extent */
+ 		if ((rc = xtExtend(0, ip, xoff + xlen, (int) nextend, 0))) {
+ 			dbFree(ip, xaddr + xlen, delta);
++			DLIMIT_FREE_BLOCK(ip, nxlen);
+ 			DQUOT_FREE_BLOCK(ip, nxlen);
+ 			goto exit;
+ 		}
+@@ -308,6 +326,7 @@ int extRealloc(struct inode *ip, s64 nxl
+ 		 */
+ 		if ((rc = xtTailgate(0, ip, xoff, (int) ntail, nxaddr, 0))) {
+ 			dbFree(ip, nxaddr, nxlen);
++			DLIMIT_FREE_BLOCK(ip, nxlen);
+ 			DQUOT_FREE_BLOCK(ip, nxlen);
+ 			goto exit;
+ 		}
+Index: linux-2.6.20/fs/jfs/jfs_filsys.h
+===================================================================
+--- linux-2.6.20.orig/fs/jfs/jfs_filsys.h
++++ linux-2.6.20/fs/jfs/jfs_filsys.h
+@@ -264,6 +264,7 @@
+ #define JFS_NAME_MAX	255
+ #define JFS_PATH_MAX	BPSIZE
+ 
++#define JFS_TAGGED		0x00800000	/* Context Tagging */
+ 
+ /*
+  *	file system state (superblock state)
+Index: linux-2.6.20/fs/jfs/jfs_imap.c
+===================================================================
+--- linux-2.6.20.orig/fs/jfs/jfs_imap.c
++++ linux-2.6.20/fs/jfs/jfs_imap.c
+@@ -45,6 +45,7 @@
+ #include <linux/buffer_head.h>
+ #include <linux/pagemap.h>
+ #include <linux/quotaops.h>
++#include <linux/vs_tag.h>
+ 
+ #include "jfs_incore.h"
+ #include "jfs_inode.h"
+@@ -3075,6 +3076,8 @@ static int copy_from_dinode(struct dinod
+ {
+ 	struct jfs_inode_info *jfs_ip = JFS_IP(ip);
+ 	struct jfs_sb_info *sbi = JFS_SBI(ip->i_sb);
++	uid_t uid;
++	gid_t gid;
+ 
+ 	jfs_ip->fileset = le32_to_cpu(dip->di_fileset);
+ 	jfs_ip->mode2 = le32_to_cpu(dip->di_mode);
+@@ -3094,14 +3097,18 @@ static int copy_from_dinode(struct dinod
+ 	}
+ 	ip->i_nlink = le32_to_cpu(dip->di_nlink);
+ 
+-	jfs_ip->saved_uid = le32_to_cpu(dip->di_uid);
++	uid = le32_to_cpu(dip->di_uid);
++	gid = le32_to_cpu(dip->di_gid);
++	ip->i_tag = INOTAG_TAG(DX_TAG(ip), uid, gid, 0);
++
++	jfs_ip->saved_uid = INOTAG_UID(DX_TAG(ip), uid, gid);
+ 	if (sbi->uid == -1)
+ 		ip->i_uid = jfs_ip->saved_uid;
+ 	else {
+ 		ip->i_uid = sbi->uid;
+ 	}
+ 
+-	jfs_ip->saved_gid = le32_to_cpu(dip->di_gid);
++	jfs_ip->saved_gid = INOTAG_GID(DX_TAG(ip), uid, gid);
+ 	if (sbi->gid == -1)
+ 		ip->i_gid = jfs_ip->saved_gid;
+ 	else {
+@@ -3166,14 +3173,12 @@ static void copy_to_dinode(struct dinode
+ 	dip->di_size = cpu_to_le64(ip->i_size);
+ 	dip->di_nblocks = cpu_to_le64(PBLK2LBLK(ip->i_sb, ip->i_blocks));
+ 	dip->di_nlink = cpu_to_le32(ip->i_nlink);
+-	if (sbi->uid == -1)
+-		dip->di_uid = cpu_to_le32(ip->i_uid);
+-	else
+-		dip->di_uid = cpu_to_le32(jfs_ip->saved_uid);
+-	if (sbi->gid == -1)
+-		dip->di_gid = cpu_to_le32(ip->i_gid);
+-	else
+-		dip->di_gid = cpu_to_le32(jfs_ip->saved_gid);
++
++	dip->di_uid = cpu_to_le32(TAGINO_UID(DX_TAG(ip),
++		(sbi->uid == -1) ? ip->i_uid : jfs_ip->saved_uid, ip->i_tag));
++	dip->di_gid = cpu_to_le32(TAGINO_GID(DX_TAG(ip),
++		(sbi->gid == -1) ? ip->i_gid : jfs_ip->saved_gid, ip->i_tag));
++
+ 	/*
+ 	 * mode2 is only needed for storing the higher order bits.
+ 	 * Trust i_mode for the lower order ones
+Index: linux-2.6.20/fs/jfs/jfs_inode.c
+===================================================================
+--- linux-2.6.20.orig/fs/jfs/jfs_inode.c
++++ linux-2.6.20/fs/jfs/jfs_inode.c
+@@ -18,6 +18,8 @@
+ 
+ #include <linux/fs.h>
+ #include <linux/quotaops.h>
++#include <linux/vs_dlimit.h>
++#include <linux/vs_tag.h>
+ #include "jfs_incore.h"
+ #include "jfs_inode.h"
+ #include "jfs_filsys.h"
+@@ -30,19 +32,47 @@ void jfs_set_inode_flags(struct inode *i
+ {
+ 	unsigned int flags = JFS_IP(inode)->mode2;
+ 
+-	inode->i_flags &= ~(S_IMMUTABLE | S_APPEND |
+-		S_NOATIME | S_DIRSYNC | S_SYNC);
++	inode->i_flags &= ~(S_IMMUTABLE | S_IUNLINK | S_BARRIER |
++		S_SYNC | S_APPEND | S_NOATIME | S_DIRSYNC);
+ 
+ 	if (flags & JFS_IMMUTABLE_FL)
+ 		inode->i_flags |= S_IMMUTABLE;
++	if (flags & JFS_IUNLINK_FL)
++		inode->i_flags |= S_IUNLINK;
++	if (flags & JFS_BARRIER_FL)
++		inode->i_flags |= S_BARRIER;
++
++	if (flags & JFS_SYNC_FL)
++		inode->i_flags |= S_SYNC;
+ 	if (flags & JFS_APPEND_FL)
+ 		inode->i_flags |= S_APPEND;
+ 	if (flags & JFS_NOATIME_FL)
+ 		inode->i_flags |= S_NOATIME;
+ 	if (flags & JFS_DIRSYNC_FL)
+ 		inode->i_flags |= S_DIRSYNC;
+-	if (flags & JFS_SYNC_FL)
+-		inode->i_flags |= S_SYNC;
++}
++
++int jfs_sync_flags(struct inode *inode)
++{
++	unsigned int oldflags, newflags;
++
++	oldflags = JFS_IP(inode)->mode2;
++	newflags = oldflags & ~(JFS_IMMUTABLE_FL |
++		JFS_IUNLINK_FL | JFS_BARRIER_FL);
++
++	if (IS_IMMUTABLE(inode))
++		newflags |= JFS_IMMUTABLE_FL;
++	if (IS_IUNLINK(inode))
++		newflags |= JFS_IUNLINK_FL;
++	if (IS_BARRIER(inode))
++		newflags |= JFS_BARRIER_FL;
++
++	if (oldflags ^ newflags) {
++		JFS_IP(inode)->mode2 = newflags;
++		inode->i_ctime = CURRENT_TIME;
++		mark_inode_dirty(inode);
++	}
++	return 0;
+ }
+ 
+ /*
+@@ -90,10 +120,17 @@ struct inode *ialloc(struct inode *paren
+ 	jfs_inode->saved_uid = inode->i_uid;
+ 	jfs_inode->saved_gid = inode->i_gid;
+ 
++	inode->i_tag = dx_current_fstag(sb);
++	if (DLIMIT_ALLOC_INODE(inode)) {
++		iput(inode);
++		return NULL;
++	}
++
+ 	/*
+ 	 * Allocate inode to quota.
+ 	 */
+ 	if (DQUOT_ALLOC_INODE(inode)) {
++		DLIMIT_FREE_INODE(inode);
+ 		DQUOT_DROP(inode);
+ 		inode->i_flags |= S_NOQUOTA;
+ 		inode->i_nlink = 0;
+Index: linux-2.6.20/fs/jfs/jfs_inode.h
+===================================================================
+--- linux-2.6.20.orig/fs/jfs/jfs_inode.h
++++ linux-2.6.20/fs/jfs/jfs_inode.h
+@@ -31,6 +31,7 @@ extern void jfs_truncate(struct inode *)
+ extern void jfs_truncate_nolock(struct inode *, loff_t);
+ extern void jfs_free_zero_link(struct inode *);
+ extern struct dentry *jfs_get_parent(struct dentry *dentry);
++extern int jfs_sync_flags(struct inode *);
+ extern void jfs_set_inode_flags(struct inode *);
+ extern int jfs_get_block(struct inode *, sector_t, struct buffer_head *, int);
+ 
+Index: linux-2.6.20/fs/jfs/jfs_xtree.c
+===================================================================
+--- linux-2.6.20.orig/fs/jfs/jfs_xtree.c
++++ linux-2.6.20/fs/jfs/jfs_xtree.c
+@@ -21,6 +21,7 @@
+ 
+ #include <linux/fs.h>
+ #include <linux/quotaops.h>
++#include <linux/vs_dlimit.h>
+ #include "jfs_incore.h"
+ #include "jfs_filsys.h"
+ #include "jfs_metapage.h"
+@@ -841,7 +842,12 @@ int xtInsert(tid_t tid,		/* transaction 
+ 			hint = 0;
+ 		if ((rc = DQUOT_ALLOC_BLOCK(ip, xlen)))
+ 			goto out;
++		if ((rc = DLIMIT_ALLOC_BLOCK(ip, xlen))) {
++			DQUOT_FREE_BLOCK(ip, xlen);
++			goto out;
++		}
+ 		if ((rc = dbAlloc(ip, hint, (s64) xlen, &xaddr))) {
++			DLIMIT_FREE_BLOCK(ip, xlen);
+ 			DQUOT_FREE_BLOCK(ip, xlen);
+ 			goto out;
+ 		}
+@@ -871,6 +877,7 @@ int xtInsert(tid_t tid,		/* transaction 
+ 			/* undo data extent allocation */
+ 			if (*xaddrp == 0) {
+ 				dbFree(ip, xaddr, (s64) xlen);
++				DLIMIT_FREE_BLOCK(ip, xlen);
+ 				DQUOT_FREE_BLOCK(ip, xlen);
+ 			}
+ 			return rc;
+@@ -1231,6 +1238,7 @@ xtSplitPage(tid_t tid, struct inode *ip,
+ 	struct tlock *tlck;
+ 	struct xtlock *sxtlck = NULL, *rxtlck = NULL;
+ 	int quota_allocation = 0;
++	int dlimit_allocation = 0;
+ 
+ 	smp = split->mp;
+ 	sp = XT_PAGE(ip, smp);
+@@ -1250,6 +1258,13 @@ xtSplitPage(tid_t tid, struct inode *ip,
+ 
+ 	quota_allocation += lengthPXD(pxd);
+ 
++	/* Allocate blocks to dlimit. */
++	if (DLIMIT_ALLOC_BLOCK(ip, lengthPXD(pxd))) {
++	       rc = -ENOSPC;
++	       goto clean_up;
++	}
++	dlimit_allocation += lengthPXD(pxd);
++
+ 	/*
+ 	 * allocate the new right page for the split
+ 	 */
+@@ -1451,6 +1466,9 @@ xtSplitPage(tid_t tid, struct inode *ip,
+ 
+       clean_up:
+ 
++	/* Rollback dlimit allocation. */
++	if (dlimit_allocation)
++		DLIMIT_FREE_BLOCK(ip, dlimit_allocation);
+ 	/* Rollback quota allocation. */
+ 	if (quota_allocation)
+ 		DQUOT_FREE_BLOCK(ip, quota_allocation);
+@@ -1515,6 +1533,12 @@ xtSplitRoot(tid_t tid,
+ 		release_metapage(rmp);
+ 		return -EDQUOT;
+ 	}
++	/* Allocate blocks to dlimit. */
++	if (DLIMIT_ALLOC_BLOCK(ip, lengthPXD(pxd))) {
++		DQUOT_FREE_BLOCK(ip, lengthPXD(pxd));
++		release_metapage(rmp);
++		return -ENOSPC;
++	}
+ 
+ 	jfs_info("xtSplitRoot: ip:0x%p rmp:0x%p", ip, rmp);
+ 
+@@ -3941,6 +3965,8 @@ s64 xtTruncate(tid_t tid, struct inode *
+ 	else
+ 		ip->i_size = newsize;
+ 
++	/* update dlimit allocation to reflect freed blocks */
++	DLIMIT_FREE_BLOCK(ip, nfreed);
+ 	/* update quota allocation to reflect freed blocks */
+ 	DQUOT_FREE_BLOCK(ip, nfreed);
+ 
+Index: linux-2.6.20/fs/jfs/namei.c
+===================================================================
+--- linux-2.6.20.orig/fs/jfs/namei.c
++++ linux-2.6.20/fs/jfs/namei.c
+@@ -20,6 +20,7 @@
+ #include <linux/fs.h>
+ #include <linux/ctype.h>
+ #include <linux/quotaops.h>
++#include <linux/vs_tag.h>
+ #include "jfs_incore.h"
+ #include "jfs_superblock.h"
+ #include "jfs_inode.h"
+@@ -1461,6 +1462,7 @@ static struct dentry *jfs_lookup(struct 
+ 		return ERR_PTR(-EACCES);
+ 	}
+ 
++	dx_propagate_tag(nd, ip);
+ 	dentry = d_splice_alias(ip, dentry);
+ 
+ 	if (dentry && (JFS_SBI(dip->i_sb)->mntflag & JFS_OS2))
+@@ -1513,6 +1515,7 @@ struct inode_operations jfs_dir_inode_op
+ 	.setattr	= jfs_setattr,
+ 	.permission	= jfs_permission,
+ #endif
++	.sync_flags	= jfs_sync_flags,
+ };
+ 
+ const struct file_operations jfs_dir_operations = {
+Index: linux-2.6.20/fs/jfs/super.c
+===================================================================
+--- linux-2.6.20.orig/fs/jfs/super.c
++++ linux-2.6.20/fs/jfs/super.c
+@@ -194,7 +194,8 @@ static void jfs_put_super(struct super_b
+ enum {
+ 	Opt_integrity, Opt_nointegrity, Opt_iocharset, Opt_resize,
+ 	Opt_resize_nosize, Opt_errors, Opt_ignore, Opt_err, Opt_quota,
+-	Opt_usrquota, Opt_grpquota, Opt_uid, Opt_gid, Opt_umask
++	Opt_usrquota, Opt_grpquota, Opt_uid, Opt_gid, Opt_umask,
++	Opt_tag, Opt_notag, Opt_tagid
+ };
+ 
+ static match_table_t tokens = {
+@@ -204,6 +205,10 @@ static match_table_t tokens = {
+ 	{Opt_resize, "resize=%u"},
+ 	{Opt_resize_nosize, "resize"},
+ 	{Opt_errors, "errors=%s"},
++	{Opt_tag, "tag"},
++	{Opt_notag, "notag"},
++	{Opt_tagid, "tagid=%u"},
++	{Opt_tag, "tagxid"},
+ 	{Opt_ignore, "noquota"},
+ 	{Opt_ignore, "quota"},
+ 	{Opt_usrquota, "usrquota"},
+@@ -338,6 +343,20 @@ static int parse_options(char *options, 
+ 			}
+ 			break;
+ 		}
++#ifndef CONFIG_TAGGING_NONE
++		case Opt_tag:
++			*flag |= JFS_TAGGED;
++			break;
++		case Opt_notag:
++			*flag &= JFS_TAGGED;
++			break;
++#endif
++#ifdef CONFIG_PROPAGATE
++		case Opt_tagid:
++			/* use args[0] */
++			*flag |= JFS_TAGGED;
++			break;
++#endif
+ 		default:
+ 			printk("jfs: Unrecognized mount option \"%s\" "
+ 					" or missing value\n", p);
+@@ -368,6 +387,13 @@ static int jfs_remount(struct super_bloc
+ 	if (!parse_options(data, sb, &newLVSize, &flag)) {
+ 		return -EINVAL;
+ 	}
++
++	if ((flag & JFS_TAGGED) && !(sb->s_flags & MS_TAGGED)) {
++		printk(KERN_ERR "JFS: %s: tagging not permitted on remount.\n",
++			sb->s_id);
++		return -EINVAL;
++	}
++
+ 	if (newLVSize) {
+ 		if (sb->s_flags & MS_RDONLY) {
+ 			printk(KERN_ERR
+@@ -439,6 +465,9 @@ static int jfs_fill_super(struct super_b
+ #ifdef CONFIG_JFS_POSIX_ACL
+ 	sb->s_flags |= MS_POSIXACL;
+ #endif
++	/* map mount option tagxid */
++	if (sbi->flag & JFS_TAGGED)
++		sb->s_flags |= MS_TAGGED;
+ 
+ 	if (newLVSize) {
+ 		printk(KERN_ERR "resize option for remount only\n");
+@@ -615,10 +644,11 @@ static int jfs_show_options(struct seq_f
+  * acquiring the locks... As quota files are never truncated and quota code
+  * itself serializes the operations (and noone else should touch the files)
+  * we don't have to be afraid of races */
+-static ssize_t jfs_quota_read(struct super_block *sb, int type, char *data,
++static ssize_t jfs_quota_read(struct dqhash *hash, int type, char *data,
+ 			      size_t len, loff_t off)
+ {
+-	struct inode *inode = sb_dqopt(sb)->files[type];
++	struct inode *inode = dqh_dqopt(hash)->files[type];
++	struct super_block *sb = hash->dqh_sb;
+ 	sector_t blk = off >> sb->s_blocksize_bits;
+ 	int err = 0;
+ 	int offset = off & (sb->s_blocksize - 1);
+@@ -660,10 +690,11 @@ static ssize_t jfs_quota_read(struct sup
+ }
+ 
+ /* Write to quotafile */
+-static ssize_t jfs_quota_write(struct super_block *sb, int type,
++static ssize_t jfs_quota_write(struct dqhash *hash, int type,
+ 			       const char *data, size_t len, loff_t off)
+ {
+-	struct inode *inode = sb_dqopt(sb)->files[type];
++	struct inode *inode = dqh_dqopt(hash)->files[type];
++	struct super_block *sb = hash->dqh_sb;
+ 	sector_t blk = off >> sb->s_blocksize_bits;
+ 	int err = 0;
+ 	int offset = off & (sb->s_blocksize - 1);
+Index: linux-2.6.20/fs/jfs/xattr.c
+===================================================================
+--- linux-2.6.20.orig/fs/jfs/xattr.c
++++ linux-2.6.20/fs/jfs/xattr.c
+@@ -23,6 +23,7 @@
+ #include <linux/posix_acl_xattr.h>
+ #include <linux/quotaops.h>
+ #include <linux/security.h>
++#include <linux/vs_dlimit.h>
+ #include "jfs_incore.h"
+ #include "jfs_superblock.h"
+ #include "jfs_dmap.h"
+@@ -263,9 +264,16 @@ static int ea_write(struct inode *ip, st
+ 	if (DQUOT_ALLOC_BLOCK(ip, nblocks)) {
+ 		return -EDQUOT;
+ 	}
++	/* Allocate new blocks to dlimit. */
++	if (DLIMIT_ALLOC_BLOCK(ip, nblocks)) {
++		DQUOT_FREE_BLOCK(ip, nblocks);
++		return -ENOSPC;
++	}
+ 
+ 	rc = dbAlloc(ip, INOHINT(ip), nblocks, &blkno);
+ 	if (rc) {
++		/*Rollback dlimit allocation. */
++		DLIMIT_FREE_BLOCK(ip, nblocks);
+ 		/*Rollback quota allocation. */
+ 		DQUOT_FREE_BLOCK(ip, nblocks);
+ 		return rc;
+@@ -332,6 +340,8 @@ static int ea_write(struct inode *ip, st
+ 
+       failed:
+ 	/* Rollback quota allocation. */
++	DLIMIT_FREE_BLOCK(ip, nblocks);
++	/* Rollback quota allocation. */
+ 	DQUOT_FREE_BLOCK(ip, nblocks);
+ 
+ 	dbFree(ip, blkno, nblocks);
+@@ -468,6 +478,7 @@ static int ea_get(struct inode *inode, s
+ 	s64 blkno;
+ 	int rc;
+ 	int quota_allocation = 0;
++	int dlimit_allocation = 0;
+ 
+ 	/* When fsck.jfs clears a bad ea, it doesn't clear the size */
+ 	if (ji->ea.flag == 0)
+@@ -543,6 +554,12 @@ static int ea_get(struct inode *inode, s
+ 
+ 		quota_allocation = blocks_needed;
+ 
++		/* Allocate new blocks to dlimit. */
++		rc = -ENOSPC;
++		if (DLIMIT_ALLOC_BLOCK(inode, blocks_needed))
++			goto clean_up;
++		dlimit_allocation = blocks_needed;
++
+ 		rc = dbAlloc(inode, INOHINT(inode), (s64) blocks_needed,
+ 			     &blkno);
+ 		if (rc)
+@@ -599,6 +616,9 @@ static int ea_get(struct inode *inode, s
+ 	return ea_size;
+ 
+       clean_up:
++	/* Rollback dlimit allocation */
++	if (dlimit_allocation)
++		DLIMIT_FREE_BLOCK(inode, dlimit_allocation);
+ 	/* Rollback quota allocation */
+ 	if (quota_allocation)
+ 		DQUOT_FREE_BLOCK(inode, quota_allocation);
+@@ -675,8 +695,10 @@ static int ea_put(tid_t tid, struct inod
+ 	}
+ 
+ 	/* If old blocks exist, they must be removed from quota allocation. */
+-	if (old_blocks)
++	if (old_blocks) {
++		DLIMIT_FREE_BLOCK(inode, old_blocks);
+ 		DQUOT_FREE_BLOCK(inode, old_blocks);
++	}
+ 
+ 	inode->i_ctime = CURRENT_TIME;
+ 
+Index: linux-2.6.20/fs/libfs.c
+===================================================================
+--- linux-2.6.20.orig/fs/libfs.c
++++ linux-2.6.20/fs/libfs.c
+@@ -124,7 +124,8 @@ static inline unsigned char dt_type(stru
+  * both impossible due to the lock on directory.
+  */
+ 
+-int dcache_readdir(struct file * filp, void * dirent, filldir_t filldir)
++static inline int do_dcache_readdir_filter(struct file * filp,
++	void * dirent, filldir_t filldir, int (*filter)(struct dentry *dentry))
+ {
+ 	struct dentry *dentry = filp->f_path.dentry;
+ 	struct dentry *cursor = filp->private_data;
+@@ -157,6 +158,8 @@ int dcache_readdir(struct file * filp, v
+ 				next = list_entry(p, struct dentry, d_u.d_child);
+ 				if (d_unhashed(next) || !next->d_inode)
+ 					continue;
++				if (filter && !filter(next))
++					continue;
+ 
+ 				spin_unlock(&dcache_lock);
+ 				if (filldir(dirent, next->d_name.name, next->d_name.len, filp->f_pos, next->d_inode->i_ino, dt_type(next->d_inode)) < 0)
+@@ -172,6 +175,18 @@ int dcache_readdir(struct file * filp, v
+ 	return 0;
+ }
+ 
++int dcache_readdir(struct file * filp, void * dirent, filldir_t filldir)
++{
++	return do_dcache_readdir_filter(filp, dirent, filldir, NULL);
++}
++
++int dcache_readdir_filter(struct file * filp, void * dirent, filldir_t filldir,
++	int (*filter)(struct dentry *))
++{
++	return do_dcache_readdir_filter(filp, dirent, filldir, filter);
++}
++
++
+ ssize_t generic_read_dir(struct file *filp, char __user *buf, size_t siz, loff_t *ppos)
+ {
+ 	return -EISDIR;
+@@ -611,6 +626,7 @@ EXPORT_SYMBOL(dcache_dir_close);
+ EXPORT_SYMBOL(dcache_dir_lseek);
+ EXPORT_SYMBOL(dcache_dir_open);
+ EXPORT_SYMBOL(dcache_readdir);
++EXPORT_SYMBOL(dcache_readdir_filter);
+ EXPORT_SYMBOL(generic_read_dir);
+ EXPORT_SYMBOL(get_sb_pseudo);
+ EXPORT_SYMBOL(simple_commit_write);
+Index: linux-2.6.20/fs/locks.c
+===================================================================
+--- linux-2.6.20.orig/fs/locks.c
++++ linux-2.6.20/fs/locks.c
+@@ -125,6 +125,8 @@
+ #include <linux/syscalls.h>
+ #include <linux/time.h>
+ #include <linux/rcupdate.h>
++#include <linux/vs_base.h>
++#include <linux/vs_limit.h>
+ 
+ #include <asm/semaphore.h>
+ #include <asm/uaccess.h>
+@@ -147,6 +149,8 @@ static struct kmem_cache *filelock_cache
+ /* Allocate an empty lock structure. */
+ static struct file_lock *locks_alloc_lock(void)
+ {
++	if (!vx_locks_avail(1))
++		return NULL;
+ 	return kmem_cache_alloc(filelock_cache, GFP_KERNEL);
+ }
+ 
+@@ -172,6 +176,7 @@ static void locks_free_lock(struct file_
+ 	BUG_ON(!list_empty(&fl->fl_block));
+ 	BUG_ON(!list_empty(&fl->fl_link));
+ 
++	vx_locks_dec(fl);
+ 	locks_release_private(fl);
+ 	kmem_cache_free(filelock_cache, fl);
+ }
+@@ -191,6 +196,7 @@ void locks_init_lock(struct file_lock *f
+ 	fl->fl_start = fl->fl_end = 0;
+ 	fl->fl_ops = NULL;
+ 	fl->fl_lmops = NULL;
++	fl->fl_xid = -1;
+ }
+ 
+ EXPORT_SYMBOL(locks_init_lock);
+@@ -248,6 +254,7 @@ void locks_copy_lock(struct file_lock *n
+ 	new->fl_file = fl->fl_file;
+ 	new->fl_ops = fl->fl_ops;
+ 	new->fl_lmops = fl->fl_lmops;
++	new->fl_xid = fl->fl_xid;
+ 
+ 	locks_copy_private(new, fl);
+ }
+@@ -286,6 +293,11 @@ static int flock_make_lock(struct file *
+ 	fl->fl_flags = FL_FLOCK;
+ 	fl->fl_type = type;
+ 	fl->fl_end = OFFSET_MAX;
++
++	vxd_assert(filp->f_xid == vx_current_xid(),
++		"f_xid(%d) == current(%d)", filp->f_xid, vx_current_xid());
++	fl->fl_xid = filp->f_xid;
++	vx_locks_inc(fl);
+ 	
+ 	*lock = fl;
+ 	return 0;
+@@ -451,6 +463,7 @@ static int lease_init(struct file *filp,
+ 
+ 	fl->fl_owner = current->files;
+ 	fl->fl_pid = current->tgid;
++	fl->fl_xid = vx_current_xid();
+ 
+ 	fl->fl_file = filp;
+ 	fl->fl_flags = FL_LEASE;
+@@ -470,6 +483,11 @@ static int lease_alloc(struct file *filp
+ 	if (fl == NULL)
+ 		goto out;
+ 
++	fl->fl_xid = vx_current_xid();
++	if (filp)
++		vxd_assert(filp->f_xid == fl->fl_xid,
++			"f_xid(%d) == fl_xid(%d)", filp->f_xid, fl->fl_xid);
++	vx_locks_inc(fl);
+ 	error = lease_init(filp, type, fl);
+ 	if (error) {
+ 		locks_free_lock(fl);
+@@ -773,6 +791,7 @@ static int flock_lock_file(struct file *
+ 	if (found)
+ 		cond_resched();
+ 
++	new_fl->fl_xid = -1;
+ find_conflict:
+ 	for_each_lock(inode, before) {
+ 		struct file_lock *fl = *before;
+@@ -791,6 +810,7 @@ find_conflict:
+ 		goto out;
+ 	locks_copy_lock(new_fl, request);
+ 	locks_insert_lock(&inode->i_flock, new_fl);
++	vx_locks_inc(new_fl);
+ 	new_fl = NULL;
+ 	error = 0;
+ 
+@@ -801,7 +821,8 @@ out:
+ 	return error;
+ }
+ 
+-static int __posix_lock_file_conf(struct inode *inode, struct file_lock *request, struct file_lock *conflock)
++static int __posix_lock_file_conf(struct inode *inode, struct file_lock *request,
++	struct file_lock *conflock, xid_t xid)
+ {
+ 	struct file_lock *fl;
+ 	struct file_lock *new_fl = NULL;
+@@ -811,6 +832,8 @@ static int __posix_lock_file_conf(struct
+ 	struct file_lock **before;
+ 	int error, added = 0;
+ 
++	vxd_assert(xid == vx_current_xid(),
++		"xid(%d) == current(%d)", xid, vx_current_xid());
+ 	/*
+ 	 * We may need two file_lock structures for this operation,
+ 	 * so we get them in advance to avoid races.
+@@ -821,7 +844,11 @@ static int __posix_lock_file_conf(struct
+ 	    (request->fl_type != F_UNLCK ||
+ 	     request->fl_start != 0 || request->fl_end != OFFSET_MAX)) {
+ 		new_fl = locks_alloc_lock();
++		new_fl->fl_xid = xid;
++		vx_locks_inc(new_fl);
+ 		new_fl2 = locks_alloc_lock();
++		new_fl2->fl_xid = xid;
++		vx_locks_inc(new_fl2);
+ 	}
+ 
+ 	lock_kernel();
+@@ -1018,7 +1045,8 @@ static int __posix_lock_file_conf(struct
+  */
+ int posix_lock_file(struct file *filp, struct file_lock *fl)
+ {
+-	return __posix_lock_file_conf(filp->f_path.dentry->d_inode, fl, NULL);
++	return __posix_lock_file_conf(filp->f_path.dentry->d_inode,
++		fl, NULL, filp->f_xid);
+ }
+ EXPORT_SYMBOL(posix_lock_file);
+ 
+@@ -1033,7 +1061,8 @@ EXPORT_SYMBOL(posix_lock_file);
+ int posix_lock_file_conf(struct file *filp, struct file_lock *fl,
+ 			struct file_lock *conflock)
+ {
+-	return __posix_lock_file_conf(filp->f_path.dentry->d_inode, fl, conflock);
++	return __posix_lock_file_conf(filp->f_path.dentry->d_inode,
++		fl, conflock, filp->f_xid);
+ }
+ EXPORT_SYMBOL(posix_lock_file_conf);
+ 
+@@ -1123,7 +1152,7 @@ int locks_mandatory_area(int read_write,
+ 	fl.fl_end = offset + count - 1;
+ 
+ 	for (;;) {
+-		error = __posix_lock_file_conf(inode, &fl, NULL);
++		error = __posix_lock_file_conf(inode, &fl, NULL, filp->f_xid);
+ 		if (error != -EAGAIN)
+ 			break;
+ 		if (!(fl.fl_flags & FL_SLEEP))
+@@ -1427,8 +1456,8 @@ static int __setlease(struct file *filp,
+ 		goto out;
+ 
+ 	locks_copy_lock(fl, lease);
+-
+ 	locks_insert_lock(before, fl);
++	vx_locks_inc(fl);
+ 
+ 	*flp = fl;
+ 	error = 0;
+@@ -1685,6 +1714,11 @@ int fcntl_setlk(unsigned int fd, struct 
+ 	if (file_lock == NULL)
+ 		return -ENOLCK;
+ 
++	vxd_assert(filp->f_xid == vx_current_xid(),
++		"f_xid(%d) == current(%d)", filp->f_xid, vx_current_xid());
++	file_lock->fl_xid = filp->f_xid;
++	vx_locks_inc(file_lock);
++
+ 	/*
+ 	 * This might block, so we do it before checking the inode.
+ 	 */
+@@ -1828,6 +1862,11 @@ int fcntl_setlk64(unsigned int fd, struc
+ 	if (file_lock == NULL)
+ 		return -ENOLCK;
+ 
++	vxd_assert(filp->f_xid == vx_current_xid(),
++		"f_xid(%d) == current(%d)", filp->f_xid, vx_current_xid());
++	file_lock->fl_xid = filp->f_xid;
++	vx_locks_inc(file_lock);
++
+ 	/*
+ 	 * This might block, so we do it before checking the inode.
+ 	 */
+@@ -2123,6 +2162,10 @@ int get_locks_status(char *buffer, char 
+ 	list_for_each(tmp, &file_lock_list) {
+ 		struct list_head *btmp;
+ 		struct file_lock *fl = list_entry(tmp, struct file_lock, fl_link);
++
++		if (!vx_check(fl->fl_xid, VS_WATCH_P|VS_IDENT))
++			continue;
++
+ 		lock_get_status(q, fl, ++i, "");
+ 		move_lock_status(&q, &pos, offset);
+ 
+Index: linux-2.6.20/fs/namei.c
+===================================================================
+--- linux-2.6.20.orig/fs/namei.c
++++ linux-2.6.20/fs/namei.c
+@@ -32,6 +32,11 @@
+ #include <linux/file.h>
+ #include <linux/fcntl.h>
+ #include <linux/namei.h>
++#include <linux/proc_fs.h>
++#include <linux/vserver/inode.h>
++#include <linux/vs_base.h>
++#include <linux/vs_tag.h>
++#include <linux/vs_cowbl.h>
+ #include <asm/namei.h>
+ #include <asm/uaccess.h>
+ 
+@@ -225,6 +230,31 @@ int generic_permission(struct inode *ino
+ 	return -EACCES;
+ }
+ 
++static inline int dx_barrier(struct inode *inode)
++{
++	if (IS_BARRIER(inode) && !vx_check(0, VS_ADMIN)) {
++		vxwprintk(1, "xid=%d did hit the barrier.",
++			vx_current_xid());
++		return 1;
++	}
++	return 0;
++}
++
++static inline int dx_permission(struct inode *inode, int mask, struct nameidata *nd)
++{
++	if (dx_barrier(inode))
++		return -EACCES;
++	if (inode->i_tag == 0)
++		return 0;
++	if (dx_check(inode->i_tag, DX_ADMIN|DX_WATCH|DX_IDENT))
++		return 0;
++
++	vxwprintk(1, "xid=%d denied access to %p[#%d,%lu] »%s«.",
++		vx_current_xid(), inode, inode->i_tag, inode->i_ino,
++		vxd_cond_path(nd));
++	return -EACCES;
++}
++
+ int permission(struct inode *inode, int mask, struct nameidata *nd)
+ {
+ 	umode_t mode = inode->i_mode;
+@@ -235,14 +265,14 @@ int permission(struct inode *inode, int 
+ 		/*
+ 		 * Nobody gets write access to a read-only fs.
+ 		 */
+-		if (IS_RDONLY(inode) &&
++		if ((IS_RDONLY(inode) || (nd && MNT_IS_RDONLY(nd->mnt))) &&
+ 		    (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)))
+ 			return -EROFS;
+ 
+ 		/*
+ 		 * Nobody gets write access to an immutable file.
+ 		 */
+-		if (IS_IMMUTABLE(inode))
++		if (IS_IMMUTABLE(inode) && !IS_COW(inode))
+ 			return -EACCES;
+ 	}
+ 
+@@ -258,6 +288,8 @@ int permission(struct inode *inode, int 
+ 
+ 	/* Ordinary permission routines do not understand MAY_APPEND. */
+ 	submask = mask & ~MAY_APPEND;
++	if ((retval = dx_permission(inode, mask, nd)))
++		return retval;
+ 	if (inode->i_op && inode->i_op->permission)
+ 		retval = inode->i_op->permission(inode, submask, nd);
+ 	else
+@@ -433,6 +465,8 @@ static int exec_permission_lite(struct i
+ {
+ 	umode_t	mode = inode->i_mode;
+ 
++	if (dx_barrier(inode))
++		return -EACCES;
+ 	if (inode->i_op && inode->i_op->permission)
+ 		return -EAGAIN;
+ 
+@@ -733,7 +767,8 @@ static __always_inline void follow_dotdo
+ 		if (nd->dentry == fs->root &&
+ 		    nd->mnt == fs->rootmnt) {
+                         read_unlock(&fs->lock);
+-			break;
++			/* for sane '/' avoid follow_mount() */
++			return;
+ 		}
+                 read_unlock(&fs->lock);
+ 		spin_lock(&dcache_lock);
+@@ -770,16 +805,34 @@ static int do_lookup(struct nameidata *n
+ {
+ 	struct vfsmount *mnt = nd->mnt;
+ 	struct dentry *dentry = __d_lookup(nd->dentry, name);
++	struct inode *inode;
+ 
+ 	if (!dentry)
+ 		goto need_lookup;
+ 	if (dentry->d_op && dentry->d_op->d_revalidate)
+ 		goto need_revalidate;
++	inode = dentry->d_inode;
++	if (!inode)
++		goto done;
++	if (inode->i_sb->s_magic == PROC_SUPER_MAGIC) {
++		struct proc_dir_entry *de = PDE(inode);
++
++		if (de && !vx_hide_check(0, de->vx_flags))
++			goto hidden;
++	}
++	if (!dx_check(inode->i_tag, DX_WATCH|DX_ADMIN|DX_HOSTID|DX_IDENT))
++		goto hidden;
+ done:
+ 	path->mnt = mnt;
+ 	path->dentry = dentry;
+ 	__follow_mount(path);
+ 	return 0;
++hidden:
++	vxwprintk(1, "xid=%d did lookup hidden %p[#%d,%lu] »%s«.",
++		vx_current_xid(), inode, inode->i_tag, inode->i_ino,
++		vxd_path(dentry, mnt));
++	dput(dentry);
++	return -ENOENT;
+ 
+ need_lookup:
+ 	dentry = real_lookup(nd->dentry, name, nd);
+@@ -1381,7 +1434,8 @@ static inline int check_sticky(struct in
+  * 10. We don't allow removal of NFS sillyrenamed files; it's handled by
+  *     nfs_async_unlink().
+  */
+-static int may_delete(struct inode *dir,struct dentry *victim,int isdir)
++static int may_delete(struct inode *dir, struct dentry *victim,
++	int isdir, struct nameidata *nd)
+ {
+ 	int error;
+ 
+@@ -1391,13 +1445,13 @@ static int may_delete(struct inode *dir,
+ 	BUG_ON(victim->d_parent->d_inode != dir);
+ 	audit_inode_child(victim->d_name.name, victim->d_inode, dir);
+ 
+-	error = permission(dir,MAY_WRITE | MAY_EXEC, NULL);
++	error = permission(dir,MAY_WRITE | MAY_EXEC, nd);
+ 	if (error)
+ 		return error;
+ 	if (IS_APPEND(dir))
+ 		return -EPERM;
+ 	if (check_sticky(dir, victim->d_inode)||IS_APPEND(victim->d_inode)||
+-	    IS_IMMUTABLE(victim->d_inode))
++		IS_IXORUNLINK(victim->d_inode))
+ 		return -EPERM;
+ 	if (isdir) {
+ 		if (!S_ISDIR(victim->d_inode->i_mode))
+@@ -1528,6 +1582,14 @@ int may_open(struct nameidata *nd, int a
+ 	if (S_ISDIR(inode->i_mode) && (flag & FMODE_WRITE))
+ 		return -EISDIR;
+ 
++#ifdef	CONFIG_VSERVER_COWBL
++	if (IS_COW(inode) && (flag & FMODE_WRITE)) {
++		if (IS_COW_LINK(inode))
++			return -EMLINK;
++		inode->i_flags &= ~(S_IUNLINK|S_IMMUTABLE);
++		mark_inode_dirty(inode);
++	}
++#endif
+ 	error = vfs_permission(nd, acc_mode);
+ 	if (error)
+ 		return error;
+@@ -1544,7 +1606,8 @@ int may_open(struct nameidata *nd, int a
+ 			return -EACCES;
+ 
+ 		flag &= ~O_TRUNC;
+-	} else if (IS_RDONLY(inode) && (flag & FMODE_WRITE))
++	} else if ((IS_RDONLY(inode) || MNT_IS_RDONLY(nd->mnt))
++		&& (flag & FMODE_WRITE))
+ 		return -EROFS;
+ 	/*
+ 	 * An append-only file must be opened in append mode for writing.
+@@ -1632,6 +1695,11 @@ int open_namei(int dfd, const char *path
+ 	struct dentry *dir;
+ 	int count = 0;
+ 
++#ifdef	CONFIG_VSERVER_COWBL
++	int rflag = flag;
++	int rmode = mode;
++restart:
++#endif
+ 	acc_mode = ACC_MODE(flag);
+ 
+ 	/* O_TRUNC implies we need access checks for write permissions */
+@@ -1725,6 +1793,22 @@ do_last:
+ 		goto exit;
+ ok:
+ 	error = may_open(nd, acc_mode, flag);
++#ifdef	CONFIG_VSERVER_COWBL
++	if (error == -EMLINK) {
++		struct dentry *dentry;
++		dentry = cow_break_link(pathname);
++		if (IS_ERR(dentry)) {
++			error = PTR_ERR(dentry);
++			goto exit;
++		}
++		dput(dentry);
++		release_open_intent(nd);
++		path_release(nd);
++		flag = rflag;
++		mode = rmode;
++		goto restart;
++	}
++#endif
+ 	if (error)
+ 		goto exit;
+ 	return 0;
+@@ -1836,9 +1920,10 @@ fail:
+ }
+ EXPORT_SYMBOL_GPL(lookup_create);
+ 
+-int vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev)
++int vfs_mknod(struct inode *dir, struct dentry *dentry,
++	int mode, dev_t dev, struct nameidata *nd)
+ {
+-	int error = may_create(dir, dentry, NULL);
++	int error = may_create(dir, dentry, nd);
+ 
+ 	if (error)
+ 		return error;
+@@ -1888,11 +1973,12 @@ asmlinkage long sys_mknodat(int dfd, con
+ 			error = vfs_create(nd.dentry->d_inode,dentry,mode,&nd);
+ 			break;
+ 		case S_IFCHR: case S_IFBLK:
+-			error = vfs_mknod(nd.dentry->d_inode,dentry,mode,
+-					new_decode_dev(dev));
++			error = vfs_mknod(nd.dentry->d_inode, dentry, mode,
++					new_decode_dev(dev), &nd);
+ 			break;
+ 		case S_IFIFO: case S_IFSOCK:
+-			error = vfs_mknod(nd.dentry->d_inode,dentry,mode,0);
++			error = vfs_mknod(nd.dentry->d_inode, dentry, mode,
++					0, &nd);
+ 			break;
+ 		case S_IFDIR:
+ 			error = -EPERM;
+@@ -1915,9 +2001,10 @@ asmlinkage long sys_mknod(const char __u
+ 	return sys_mknodat(AT_FDCWD, filename, mode, dev);
+ }
+ 
+-int vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
++int vfs_mkdir(struct inode *dir, struct dentry *dentry,
++	int mode, struct nameidata *nd)
+ {
+-	int error = may_create(dir, dentry, NULL);
++	int error = may_create(dir, dentry, nd);
+ 
+ 	if (error)
+ 		return error;
+@@ -1959,7 +2046,7 @@ asmlinkage long sys_mkdirat(int dfd, con
+ 
+ 	if (!IS_POSIXACL(nd.dentry->d_inode))
+ 		mode &= ~current->fs->umask;
+-	error = vfs_mkdir(nd.dentry->d_inode, dentry, mode);
++	error = vfs_mkdir(nd.dentry->d_inode, dentry, mode, &nd);
+ 	dput(dentry);
+ out_unlock:
+ 	mutex_unlock(&nd.dentry->d_inode->i_mutex);
+@@ -2002,9 +2089,10 @@ void dentry_unhash(struct dentry *dentry
+ 	spin_unlock(&dcache_lock);
+ }
+ 
+-int vfs_rmdir(struct inode *dir, struct dentry *dentry)
++int vfs_rmdir(struct inode *dir, struct dentry *dentry,
++	struct nameidata *nd)
+ {
+-	int error = may_delete(dir, dentry, 1);
++	int error = may_delete(dir, dentry, 1, nd);
+ 
+ 	if (error)
+ 		return error;
+@@ -2066,7 +2154,7 @@ static long do_rmdir(int dfd, const char
+ 	error = PTR_ERR(dentry);
+ 	if (IS_ERR(dentry))
+ 		goto exit2;
+-	error = vfs_rmdir(nd.dentry->d_inode, dentry);
++	error = vfs_rmdir(nd.dentry->d_inode, dentry, &nd);
+ 	dput(dentry);
+ exit2:
+ 	mutex_unlock(&nd.dentry->d_inode->i_mutex);
+@@ -2082,9 +2170,10 @@ asmlinkage long sys_rmdir(const char __u
+ 	return do_rmdir(AT_FDCWD, pathname);
+ }
+ 
+-int vfs_unlink(struct inode *dir, struct dentry *dentry)
++int vfs_unlink(struct inode *dir, struct dentry *dentry,
++	struct nameidata *nd)
+ {
+-	int error = may_delete(dir, dentry, 0);
++	int error = may_delete(dir, dentry, 0, nd);
+ 
+ 	if (error)
+ 		return error;
+@@ -2146,7 +2235,7 @@ static long do_unlinkat(int dfd, const c
+ 		inode = dentry->d_inode;
+ 		if (inode)
+ 			atomic_inc(&inode->i_count);
+-		error = vfs_unlink(nd.dentry->d_inode, dentry);
++		error = vfs_unlink(nd.dentry->d_inode, dentry, &nd);
+ 	exit2:
+ 		dput(dentry);
+ 	}
+@@ -2181,9 +2270,10 @@ asmlinkage long sys_unlink(const char __
+ 	return do_unlinkat(AT_FDCWD, pathname);
+ }
+ 
+-int vfs_symlink(struct inode *dir, struct dentry *dentry, const char *oldname, int mode)
++int vfs_symlink(struct inode *dir, struct dentry *dentry,
++	const char *oldname, int mode, struct nameidata *nd)
+ {
+-	int error = may_create(dir, dentry, NULL);
++	int error = may_create(dir, dentry, nd);
+ 
+ 	if (error)
+ 		return error;
+@@ -2227,7 +2317,7 @@ asmlinkage long sys_symlinkat(const char
+ 	if (IS_ERR(dentry))
+ 		goto out_unlock;
+ 
+-	error = vfs_symlink(nd.dentry->d_inode, dentry, from, S_IALLUGO);
++	error = vfs_symlink(nd.dentry->d_inode, dentry, from, S_IALLUGO, &nd);
+ 	dput(dentry);
+ out_unlock:
+ 	mutex_unlock(&nd.dentry->d_inode->i_mutex);
+@@ -2244,7 +2334,8 @@ asmlinkage long sys_symlink(const char _
+ 	return sys_symlinkat(oldname, AT_FDCWD, newname);
+ }
+ 
+-int vfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *new_dentry)
++int vfs_link(struct dentry *old_dentry, struct inode *dir,
++	struct dentry *new_dentry, struct nameidata *nd)
+ {
+ 	struct inode *inode = old_dentry->d_inode;
+ 	int error;
+@@ -2252,7 +2343,7 @@ int vfs_link(struct dentry *old_dentry, 
+ 	if (!inode)
+ 		return -ENOENT;
+ 
+-	error = may_create(dir, new_dentry, NULL);
++	error = may_create(dir, new_dentry, nd);
+ 	if (error)
+ 		return error;
+ 
+@@ -2262,7 +2353,7 @@ int vfs_link(struct dentry *old_dentry, 
+ 	/*
+ 	 * A link to an append-only or immutable file cannot be created.
+ 	 */
+-	if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
++	if (IS_APPEND(inode) || IS_IXORUNLINK(inode))
+ 		return -EPERM;
+ 	if (!dir->i_op || !dir->i_op->link)
+ 		return -EPERM;
+@@ -2322,7 +2413,7 @@ asmlinkage long sys_linkat(int olddfd, c
+ 	error = PTR_ERR(new_dentry);
+ 	if (IS_ERR(new_dentry))
+ 		goto out_unlock;
+-	error = vfs_link(old_nd.dentry, nd.dentry->d_inode, new_dentry);
++	error = vfs_link(old_nd.dentry, nd.dentry->d_inode, new_dentry, &nd);
+ 	dput(new_dentry);
+ out_unlock:
+ 	mutex_unlock(&nd.dentry->d_inode->i_mutex);
+@@ -2454,14 +2545,14 @@ int vfs_rename(struct inode *old_dir, st
+ 	if (old_dentry->d_inode == new_dentry->d_inode)
+  		return 0;
+  
+-	error = may_delete(old_dir, old_dentry, is_dir);
++	error = may_delete(old_dir, old_dentry, is_dir, NULL);
+ 	if (error)
+ 		return error;
+ 
+ 	if (!new_dentry->d_inode)
+ 		error = may_create(new_dir, new_dentry, NULL);
+ 	else
+-		error = may_delete(new_dir, new_dentry, is_dir);
++		error = may_delete(new_dir, new_dentry, is_dir, NULL);
+ 	if (error)
+ 		return error;
+ 
+@@ -2539,6 +2630,9 @@ static int do_rename(int olddfd, const c
+ 	error = -EINVAL;
+ 	if (old_dentry == trap)
+ 		goto exit4;
++	error = -EROFS;
++	if (MNT_IS_RDONLY(newnd.mnt))
++		goto exit4;
+ 	new_dentry = lookup_hash(&newnd);
+ 	error = PTR_ERR(new_dentry);
+ 	if (IS_ERR(new_dentry))
+@@ -2632,6 +2726,129 @@ int vfs_follow_link(struct nameidata *nd
+ 	return __vfs_follow_link(nd, link);
+ }
+ 
++
++#ifdef	CONFIG_VSERVER_COWBL
++
++#include <linux/file.h>
++
++struct dentry *cow_break_link(const char *pathname)
++{
++	int ret, mode, pathlen;
++	struct nameidata old_nd, dir_nd;
++	struct dentry *old_dentry, *new_dentry;
++	struct dentry *res = ERR_PTR(-EMLINK);
++	struct vfsmount *old_mnt, *new_mnt;
++	struct file *old_file;
++	struct file *new_file;
++	char *to, *path, pad='\251';
++	loff_t size;
++
++	vxdprintk(VXD_CBIT(misc, 1), "cow_break_link(»%s«)", pathname);
++	path = kmalloc(PATH_MAX, GFP_KERNEL);
++
++	ret = path_lookup(pathname, LOOKUP_FOLLOW, &old_nd);
++	vxdprintk(VXD_CBIT(misc, 2), "path_lookup(old): %d", ret);
++	old_dentry = old_nd.dentry;
++	old_mnt = old_nd.mnt;
++	mode = old_dentry->d_inode->i_mode;
++
++	to = d_path(old_dentry, old_mnt, path, PATH_MAX-2);
++	pathlen = strlen(to);
++	vxdprintk(VXD_CBIT(misc, 2), "old path »%s«", to);
++
++	to[pathlen+1] = 0;
++retry:
++	to[pathlen] = pad--;
++	if (pad <= '\240')
++		goto out_rel_old;
++
++	vxdprintk(VXD_CBIT(misc, 1), "temp copy »%s«", to);
++	ret = path_lookup(to,
++		LOOKUP_PARENT|LOOKUP_OPEN|LOOKUP_CREATE, &dir_nd);
++
++	/* this puppy downs the inode sem */
++	new_dentry = lookup_create(&dir_nd, 0);
++	vxdprintk(VXD_CBIT(misc, 2),
++		"lookup_create(new): %p", new_dentry);
++	if (!new_dentry) {
++		path_release(&dir_nd);
++		goto retry;
++	}
++
++	ret = vfs_create(dir_nd.dentry->d_inode, new_dentry, mode, &dir_nd);
++	vxdprintk(VXD_CBIT(misc, 2),
++		"vfs_create(new): %d", ret);
++	if (ret == -EEXIST) {
++		mutex_unlock(&dir_nd.dentry->d_inode->i_mutex);
++		dput(new_dentry);
++		path_release(&dir_nd);
++		goto retry;
++	}
++	else if (ret < 0) {
++		res = ERR_PTR(ret);
++		goto out_rel_both;
++	}
++
++	new_mnt = dir_nd.mnt;
++
++	dget(old_dentry);
++	mntget(old_mnt);
++	/* this one cleans up the dentry in case of failure */
++	old_file = dentry_open(old_dentry, old_mnt, O_RDONLY);
++	vxdprintk(VXD_CBIT(misc, 2),
++		"dentry_open(old): %p", old_file);
++	if (!old_file)
++		goto out_rel_both;
++
++	dget(new_dentry);
++	mntget(new_mnt);
++	/* this one cleans up the dentry in case of failure */
++	new_file = dentry_open(new_dentry, new_mnt, O_WRONLY);
++	vxdprintk(VXD_CBIT(misc, 2),
++		"dentry_open(new): %p", new_file);
++	if (!new_file)
++		goto out_fput_old;
++
++	size = i_size_read(old_file->f_dentry->d_inode);
++	ret = vfs_sendfile(new_file, old_file, NULL, size, 0);
++	vxdprintk(VXD_CBIT(misc, 2), "vfs_sendfile: %d", ret);
++
++	if (ret < 0)
++		goto out_fput_both;
++
++	ret = vfs_rename(dir_nd.dentry->d_inode, new_dentry,
++		old_nd.dentry->d_parent->d_inode, old_dentry);
++	vxdprintk(VXD_CBIT(misc, 2), "vfs_rename: %d", ret);
++	if (!ret) {
++		res = new_dentry;
++		dget(new_dentry);
++	}
++
++out_fput_both:
++	vxdprintk(VXD_CBIT(misc, 3),
++		"fput(new_file=%p[#%d])", new_file,
++		atomic_read(&new_file->f_count));
++	fput(new_file);
++
++out_fput_old:
++	vxdprintk(VXD_CBIT(misc, 3),
++		"fput(old_file=%p[#%d])", old_file,
++		atomic_read(&old_file->f_count));
++	fput(old_file);
++
++out_rel_both:
++	mutex_unlock(&dir_nd.dentry->d_inode->i_mutex);
++	dput(new_dentry);
++
++	path_release(&dir_nd);
++out_rel_old:
++	path_release(&old_nd);
++	kfree(path);
++	return res;
++}
++
++#endif
++
+ /* get the link contents into pagecache */
+ static char *page_getlink(struct dentry * dentry, struct page **ppage)
+ {
+Index: linux-2.6.20/fs/namespace.c
+===================================================================
+--- linux-2.6.20.orig/fs/namespace.c
++++ linux-2.6.20/fs/namespace.c
+@@ -25,6 +25,11 @@
+ #include <linux/security.h>
+ #include <linux/mount.h>
+ #include <linux/ramfs.h>
++#include <linux/vs_base.h>
++#include <linux/vs_context.h>
++#include <linux/vs_tag.h>
++#include <linux/vserver/space.h>
++#include <linux/vserver/global.h>
+ #include <asm/uaccess.h>
+ #include <asm/unistd.h>
+ #include "pnode.h"
+@@ -241,6 +246,7 @@ static struct vfsmount *clone_mnt(struct
+ 		mnt->mnt_root = dget(root);
+ 		mnt->mnt_mountpoint = mnt->mnt_root;
+ 		mnt->mnt_parent = mnt;
++		mnt->mnt_tag = old->mnt_tag;
+ 
+ 		if (flag & CL_SLAVE) {
+ 			list_add(&mnt->mnt_slave, &old->mnt_slave_list);
+@@ -349,44 +355,86 @@ static inline void mangle(struct seq_fil
+ 	seq_escape(m, s, " \t\n\\");
+ }
+ 
++static int mnt_is_reachable(struct vfsmount *mnt)
++{
++	struct vfsmount *root_mnt;
++	struct dentry *root, *point;
++	int ret;
++
++	if (mnt == mnt->mnt_ns->root)
++		return 1;
++
++	spin_lock(&vfsmount_lock);
++	root_mnt = current->fs->rootmnt;
++	root = current->fs->root;
++	point = root;
++
++	while ((mnt != mnt->mnt_parent) && (mnt != root_mnt)) {
++		point = mnt->mnt_mountpoint;
++		mnt = mnt->mnt_parent;
++	}
++
++	ret = (mnt == root_mnt) && is_subdir(point, root);
++
++	spin_unlock(&vfsmount_lock);
++
++	return ret;
++}
++
+ static int show_vfsmnt(struct seq_file *m, void *v)
+ {
+ 	struct vfsmount *mnt = v;
+ 	int err = 0;
+ 	static struct proc_fs_info {
+-		int flag;
+-		char *str;
++		int s_flag;
++		int mnt_flag;
++		char *set_str;
++		char *unset_str;
+ 	} fs_info[] = {
+-		{ MS_SYNCHRONOUS, ",sync" },
+-		{ MS_DIRSYNC, ",dirsync" },
+-		{ MS_MANDLOCK, ",mand" },
+-		{ 0, NULL }
+-	};
+-	static struct proc_fs_info mnt_info[] = {
+-		{ MNT_NOSUID, ",nosuid" },
+-		{ MNT_NODEV, ",nodev" },
+-		{ MNT_NOEXEC, ",noexec" },
+-		{ MNT_NOATIME, ",noatime" },
+-		{ MNT_NODIRATIME, ",nodiratime" },
+-		{ MNT_RELATIME, ",relatime" },
+-		{ 0, NULL }
++		{ MS_RDONLY, MNT_RDONLY, "ro", "rw" },
++		{ MS_SYNCHRONOUS, 0, ",sync", NULL },
++		{ MS_DIRSYNC, 0, ",dirsync", NULL },
++		{ MS_MANDLOCK, 0, ",mand", NULL },
++		{ MS_TAGGED, 0, ",tag", NULL },
++		{ MS_NOATIME, MNT_NOATIME, ",noatime", NULL },
++		{ MS_NODIRATIME, MNT_NODIRATIME, ",nodiratime", NULL },
++		{ MS_RELATIME, MNT_RELATIME, ",relatime", NULL },
++		{ 0, MNT_NOSUID, ",nosuid", NULL },
++		{ 0, MNT_NODEV, ",nodev", NULL },
++		{ 0, MNT_NOEXEC, ",noexec", NULL },
++		{ 0, 0, NULL, NULL }
+ 	};
+-	struct proc_fs_info *fs_infop;
++	struct proc_fs_info *p;
++	unsigned long s_flags = mnt->mnt_sb->s_flags;
++	int mnt_flags = mnt->mnt_flags;
+ 
+-	mangle(m, mnt->mnt_devname ? mnt->mnt_devname : "none");
+-	seq_putc(m, ' ');
+-	seq_path(m, mnt, mnt->mnt_root, " \t\n\\");
+-	seq_putc(m, ' ');
++	if (vx_flags(VXF_HIDE_MOUNT, 0))
++		return 0;
++	if (!mnt_is_reachable(mnt) && !vx_check(0, VS_WATCH_P))
++		return 0;
++
++	if (!vx_check(0, VS_ADMIN|VS_WATCH) &&
++		mnt == current->fs->rootmnt) {
++		seq_puts(m, "/dev/root / ");
++	} else {
++		mangle(m, mnt->mnt_devname ? mnt->mnt_devname : "none");
++		seq_putc(m, ' ');
++		seq_path(m, mnt, mnt->mnt_root, " \t\n\\");
++		seq_putc(m, ' ');
++	}
+ 	mangle(m, mnt->mnt_sb->s_type->name);
+-	seq_puts(m, mnt->mnt_sb->s_flags & MS_RDONLY ? " ro" : " rw");
+-	for (fs_infop = fs_info; fs_infop->flag; fs_infop++) {
+-		if (mnt->mnt_sb->s_flags & fs_infop->flag)
+-			seq_puts(m, fs_infop->str);
+-	}
+-	for (fs_infop = mnt_info; fs_infop->flag; fs_infop++) {
+-		if (mnt->mnt_flags & fs_infop->flag)
+-			seq_puts(m, fs_infop->str);
++	seq_putc(m, ' ');
++	for (p = fs_info; (p->s_flag | p->mnt_flag) ; p++) {
++		if ((s_flags & p->s_flag) || (mnt_flags & p->mnt_flag)) {
++			if (p->set_str)
++				seq_puts(m, p->set_str);
++		} else {
++			if (p->unset_str)
++				seq_puts(m, p->unset_str);
++		}
+ 	}
++	if (mnt->mnt_flags & MNT_TAGID)
++		seq_printf(m, ",tag=%d", mnt->mnt_tag);
+ 	if (mnt->mnt_sb->s_op->show_options)
+ 		err = mnt->mnt_sb->s_op->show_options(m, mnt);
+ 	seq_puts(m, " 0 0\n");
+@@ -405,17 +453,27 @@ static int show_vfsstat(struct seq_file 
+ 	struct vfsmount *mnt = v;
+ 	int err = 0;
+ 
+-	/* device */
+-	if (mnt->mnt_devname) {
+-		seq_puts(m, "device ");
+-		mangle(m, mnt->mnt_devname);
+-	} else
+-		seq_puts(m, "no device");
+-
+-	/* mount point */
+-	seq_puts(m, " mounted on ");
+-	seq_path(m, mnt, mnt->mnt_root, " \t\n\\");
+-	seq_putc(m, ' ');
++	if (vx_flags(VXF_HIDE_MOUNT, 0))
++		return 0;
++	if (!mnt_is_reachable(mnt) && !vx_check(0, VS_WATCH_P))
++		return 0;
++
++	if (!vx_check(0, VS_ADMIN|VS_WATCH) &&
++		mnt == current->fs->rootmnt) {
++		seq_puts(m, "device /dev/root mounted on / ");
++	} else {
++		/* device */
++		if (mnt->mnt_devname) {
++			seq_puts(m, "device ");
++			mangle(m, mnt->mnt_devname);
++		} else
++			seq_puts(m, "no device");
++
++		/* mount point */
++		seq_puts(m, " mounted on ");
++		seq_path(m, mnt, mnt->mnt_root, " \t\n\\");
++		seq_putc(m, ' ');
++	}
+ 
+ 	/* file system type */
+ 	seq_puts(m, "with fstype ");
+@@ -596,7 +654,7 @@ static int do_umount(struct vfsmount *mn
+ 		down_write(&sb->s_umount);
+ 		if (!(sb->s_flags & MS_RDONLY)) {
+ 			lock_kernel();
+-			DQUOT_OFF(sb);
++			DQUOT_OFF(sb->s_dqh);
+ 			retval = do_remount_sb(sb, MS_RDONLY, NULL, 0);
+ 			unlock_kernel();
+ 		}
+@@ -645,7 +703,7 @@ asmlinkage long sys_umount(char __user *
+ 		goto dput_and_out;
+ 
+ 	retval = -EPERM;
+-	if (!capable(CAP_SYS_ADMIN))
++	if (!vx_capable(CAP_SYS_ADMIN, VXC_SECURE_MOUNT))
+ 		goto dput_and_out;
+ 
+ 	retval = do_umount(nd.mnt, flags);
+@@ -669,7 +727,7 @@ asmlinkage long sys_oldumount(char __use
+ 
+ static int mount_is_safe(struct nameidata *nd)
+ {
+-	if (capable(CAP_SYS_ADMIN))
++	if (vx_capable(CAP_SYS_ADMIN, VXC_SECURE_MOUNT))
+ 		return 0;
+ 	return -EPERM;
+ #ifdef notyet
+@@ -898,11 +956,13 @@ static int do_change_type(struct nameida
+ /*
+  * do loopback mount.
+  */
+-static int do_loopback(struct nameidata *nd, char *old_name, int recurse)
++static int do_loopback(struct nameidata *nd, char *old_name, tag_t tag,
++	unsigned long flags, int mnt_flags)
+ {
+ 	struct nameidata old_nd;
+ 	struct vfsmount *mnt = NULL;
+ 	int err = mount_is_safe(nd);
++	int recurse = flags & MS_REC;
+ 	if (err)
+ 		return err;
+ 	if (!old_name || !*old_name)
+@@ -928,6 +988,12 @@ static int do_loopback(struct nameidata 
+ 	if (!mnt)
+ 		goto out;
+ 
++	mnt->mnt_flags = mnt_flags;
++	if (flags & MS_TAGID) {
++		mnt->mnt_tag = tag;
++		mnt->mnt_flags |= MNT_TAGID;
++	}
++
+ 	err = graft_tree(mnt, nd);
+ 	if (err) {
+ 		LIST_HEAD(umount_list);
+@@ -936,6 +1002,7 @@ static int do_loopback(struct nameidata 
+ 		spin_unlock(&vfsmount_lock);
+ 		release_mounts(&umount_list);
+ 	}
++	mnt->mnt_flags = mnt_flags;
+ 
+ out:
+ 	up_write(&namespace_sem);
+@@ -949,12 +1016,12 @@ out:
+  * on it - tough luck.
+  */
+ static int do_remount(struct nameidata *nd, int flags, int mnt_flags,
+-		      void *data)
++		      void *data, xid_t xid)
+ {
+ 	int err;
+ 	struct super_block *sb = nd->mnt->mnt_sb;
+ 
+-	if (!capable(CAP_SYS_ADMIN))
++	if (!vx_capable(CAP_SYS_ADMIN, VXC_SECURE_REMOUNT))
+ 		return -EPERM;
+ 
+ 	if (!check_mnt(nd->mnt))
+@@ -988,7 +1055,7 @@ static int do_move_mount(struct nameidat
+ 	struct nameidata old_nd, parent_nd;
+ 	struct vfsmount *p;
+ 	int err = 0;
+-	if (!capable(CAP_SYS_ADMIN))
++	if (!vx_capable(CAP_SYS_ADMIN, VXC_SECURE_MOUNT))
+ 		return -EPERM;
+ 	if (!old_name || !*old_name)
+ 		return -EINVAL;
+@@ -1068,7 +1135,7 @@ static int do_new_mount(struct nameidata
+ 		return -EINVAL;
+ 
+ 	/* we need capabilities... */
+-	if (!capable(CAP_SYS_ADMIN))
++	if (!vx_capable(CAP_SYS_ADMIN, VXC_SECURE_MOUNT))
+ 		return -EPERM;
+ 
+ 	mnt = do_kern_mount(type, flags, name, data);
+@@ -1380,6 +1447,7 @@ long do_mount(char *dev_name, char *dir_
+ 	struct nameidata nd;
+ 	int retval = 0;
+ 	int mnt_flags = 0;
++	tag_t tag = 0;
+ 
+ 	/* Discard magic */
+ 	if ((flags & MS_MGC_MSK) == MS_MGC_VAL)
+@@ -1395,7 +1463,19 @@ long do_mount(char *dev_name, char *dir_
+ 	if (data_page)
+ 		((char *)data_page)[PAGE_SIZE - 1] = 0;
+ 
++#ifdef	CONFIG_PROPAGATE
++	retval = dx_parse_tag(data_page, &tag, 1);
++	if (retval) {
++		mnt_flags |= MNT_TAGID;
++		/* bind and re-mounts get the tag flag */
++		if (flags & (MS_BIND|MS_REMOUNT))
++			flags |= MS_TAGID;
++	}
++#endif
++
+ 	/* Separate the per-mountpoint flags */
++	if (flags & MS_RDONLY)
++		mnt_flags |= MNT_RDONLY;
+ 	if (flags & MS_NOSUID)
+ 		mnt_flags |= MNT_NOSUID;
+ 	if (flags & MS_NODEV)
+@@ -1409,6 +1489,8 @@ long do_mount(char *dev_name, char *dir_
+ 	if (flags & MS_RELATIME)
+ 		mnt_flags |= MNT_RELATIME;
+ 
++	if (!capable(CAP_SYS_ADMIN))
++		mnt_flags |= MNT_NODEV;
+ 	flags &= ~(MS_NOSUID | MS_NOEXEC | MS_NODEV | MS_ACTIVE |
+ 		   MS_NOATIME | MS_NODIRATIME | MS_RELATIME);
+ 
+@@ -1423,9 +1505,9 @@ long do_mount(char *dev_name, char *dir_
+ 
+ 	if (flags & MS_REMOUNT)
+ 		retval = do_remount(&nd, flags & ~MS_REMOUNT, mnt_flags,
+-				    data_page);
++				    data_page, tag);
+ 	else if (flags & MS_BIND)
+-		retval = do_loopback(&nd, dev_name, flags & MS_REC);
++		retval = do_loopback(&nd, dev_name, tag, flags, mnt_flags);
+ 	else if (flags & (MS_SHARED | MS_PRIVATE | MS_SLAVE | MS_UNBINDABLE))
+ 		retval = do_change_type(&nd, flags);
+ 	else if (flags & MS_MOVE)
+@@ -1499,6 +1581,7 @@ struct mnt_namespace *dup_mnt_ns(struct 
+ 		q = next_mnt(q, new_ns->root);
+ 	}
+ 	up_write(&namespace_sem);
++	atomic_inc(&vs_global_mnt_ns);
+ 
+ 	if (rootmnt)
+ 		mntput(rootmnt);
+@@ -1524,7 +1607,7 @@ int copy_mnt_ns(int flags, struct task_s
+ 	if (!(flags & CLONE_NEWNS))
+ 		return 0;
+ 
+-	if (!capable(CAP_SYS_ADMIN)) {
++	if (!vx_capable(CAP_SYS_ADMIN, VXC_SECURE_MOUNT)) {
+ 		err = -EPERM;
+ 		goto out;
+ 	}
+@@ -1876,5 +1959,6 @@ void __put_mnt_ns(struct mnt_namespace *
+ 	spin_unlock(&vfsmount_lock);
+ 	up_write(&namespace_sem);
+ 	release_mounts(&umount_list);
++	atomic_dec(&vs_global_mnt_ns);
+ 	kfree(ns);
+ }
+Index: linux-2.6.20/fs/nfs/client.c
+===================================================================
+--- linux-2.6.20.orig/fs/nfs/client.c
++++ linux-2.6.20/fs/nfs/client.c
+@@ -520,6 +520,9 @@ static int nfs_init_server_rpcclient(str
+ 	if (server->flags & NFS4_MOUNT_INTR)
+ 		server->client->cl_intr = 1;
+ 
++	server->client->cl_tag = 0;
++	if (server->flags & NFS_MOUNT_TAGGED)
++		server->client->cl_tag = 1;
+ 	return 0;
+ }
+ 
+@@ -676,6 +679,10 @@ static void nfs_server_set_fsinfo(struct
+ 		server->acdirmin = server->acdirmax = 0;
+ 	}
+ 
++	/* FIXME: needs fsinfo
++	if (server->flags & NFS_MOUNT_TAGGED)
++		sb->s_flags |= MS_TAGGED;	*/
++
+ 	server->maxfilesize = fsinfo->maxfilesize;
+ 
+ 	/* We're airborne Set socket buffersize */
+Index: linux-2.6.20/fs/nfs/dir.c
+===================================================================
+--- linux-2.6.20.orig/fs/nfs/dir.c
++++ linux-2.6.20/fs/nfs/dir.c
+@@ -33,6 +33,7 @@
+ #include <linux/pagevec.h>
+ #include <linux/namei.h>
+ #include <linux/mount.h>
++#include <linux/vs_tag.h>
+ 
+ #include "nfs4_fs.h"
+ #include "delegation.h"
+@@ -933,6 +934,7 @@ static struct dentry *nfs_lookup(struct 
+ 	if (IS_ERR(res))
+ 		goto out_unlock;
+ 
++	dx_propagate_tag(nd, inode);
+ no_entry:
+ 	res = d_materialise_unique(dentry, inode);
+ 	if (res != NULL) {
+@@ -975,7 +977,8 @@ static int is_atomic_open(struct inode *
+ 	if (nd->flags & LOOKUP_DIRECTORY)
+ 		return 0;
+ 	/* Are we trying to write to a read only partition? */
+-	if (IS_RDONLY(dir) && (nd->intent.open.flags & (O_CREAT|O_TRUNC|FMODE_WRITE)))
++	if ((IS_RDONLY(dir) || MNT_IS_RDONLY(nd->mnt)) &&
++		(nd->intent.open.flags & (O_CREAT|O_TRUNC|FMODE_WRITE)))
+ 		return 0;
+ 	return 1;
+ }
+Index: linux-2.6.20/fs/nfs/inode.c
+===================================================================
+--- linux-2.6.20.orig/fs/nfs/inode.c
++++ linux-2.6.20/fs/nfs/inode.c
+@@ -37,6 +37,7 @@
+ #include <linux/vfs.h>
+ #include <linux/inet.h>
+ #include <linux/nfs_xdr.h>
++#include <linux/vs_tag.h>
+ 
+ #include <asm/system.h>
+ #include <asm/uaccess.h>
+@@ -279,8 +280,10 @@ nfs_fhget(struct super_block *sb, struct
+ 			nfsi->change_attr = fattr->change_attr;
+ 		inode->i_size = nfs_size_to_loff_t(fattr->size);
+ 		inode->i_nlink = fattr->nlink;
+-		inode->i_uid = fattr->uid;
+-		inode->i_gid = fattr->gid;
++		inode->i_uid = INOTAG_UID(DX_TAG(inode), fattr->uid, fattr->gid);
++		inode->i_gid = INOTAG_GID(DX_TAG(inode), fattr->uid, fattr->gid);
++		inode->i_tag = INOTAG_TAG(DX_TAG(inode), fattr->uid, fattr->gid, 0);
++					 /* maybe fattr->xid someday */
+ 		if (fattr->valid & (NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4)) {
+ 			/*
+ 			 * report the blocks in 512byte units
+@@ -369,6 +372,8 @@ void nfs_setattr_update_inode(struct ino
+ 			inode->i_uid = attr->ia_uid;
+ 		if ((attr->ia_valid & ATTR_GID) != 0)
+ 			inode->i_gid = attr->ia_gid;
++		if ((attr->ia_valid & ATTR_TAG) && IS_TAGGED(inode))
++			inode->i_tag = attr->ia_tag;
+ 		spin_lock(&inode->i_lock);
+ 		NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
+ 		spin_unlock(&inode->i_lock);
+@@ -815,6 +820,9 @@ static int nfs_check_inode_attributes(st
+ 	struct nfs_inode *nfsi = NFS_I(inode);
+ 	loff_t cur_size, new_isize;
+ 	int data_unstable;
++	uid_t uid;
++	gid_t gid;
++	tag_t tag;
+ 
+ 
+ 	/* Has the inode gone and changed behind our back? */
+@@ -842,10 +850,15 @@ static int nfs_check_inode_attributes(st
+ 	if (cur_size != new_isize && nfsi->npages == 0)
+ 		nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
+ 
++	uid = INOTAG_UID(DX_TAG(inode), fattr->uid, fattr->gid);
++	gid = INOTAG_GID(DX_TAG(inode), fattr->uid, fattr->gid);
++	tag = INOTAG_TAG(DX_TAG(inode), fattr->uid, fattr->gid, 0);
++
+ 	/* Have any file permissions changed? */
+ 	if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)
+-			|| inode->i_uid != fattr->uid
+-			|| inode->i_gid != fattr->gid)
++			|| inode->i_uid != uid
++			|| inode->i_gid != gid
++			|| inode->i_tag != tag)
+ 		nfsi->cache_validity |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
+ 
+ 	/* Has the link count changed? */
+@@ -935,6 +948,9 @@ static int nfs_update_inode(struct inode
+ 	loff_t cur_isize, new_isize;
+ 	unsigned int	invalid = 0;
+ 	int data_stable;
++	uid_t uid;
++	gid_t gid;
++	tag_t tag;
+ 
+ 	dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n",
+ 			__FUNCTION__, inode->i_sb->s_id, inode->i_ino,
+@@ -1007,15 +1023,21 @@ static int nfs_update_inode(struct inode
+ 	}
+ 	memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime));
+ 
++	uid = INOTAG_UID(DX_TAG(inode), fattr->uid, fattr->gid);
++	gid = INOTAG_GID(DX_TAG(inode), fattr->uid, fattr->gid);
++	tag = INOTAG_TAG(DX_TAG(inode), fattr->uid, fattr->gid, 0);
++
+ 	if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO) ||
+-	    inode->i_uid != fattr->uid ||
+-	    inode->i_gid != fattr->gid)
++	    inode->i_uid != uid ||
++	    inode->i_gid != gid ||
++	    inode->i_tag != tag)
+ 		invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
+ 
+ 	inode->i_mode = fattr->mode;
+ 	inode->i_nlink = fattr->nlink;
+-	inode->i_uid = fattr->uid;
+-	inode->i_gid = fattr->gid;
++	inode->i_uid = uid;
++	inode->i_gid = gid;
++	inode->i_tag = tag;
+ 
+ 	if (fattr->valid & (NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4)) {
+ 		/*
+Index: linux-2.6.20/fs/nfs/nfs3xdr.c
+===================================================================
+--- linux-2.6.20.orig/fs/nfs/nfs3xdr.c
++++ linux-2.6.20/fs/nfs/nfs3xdr.c
+@@ -22,6 +22,7 @@
+ #include <linux/nfs3.h>
+ #include <linux/nfs_fs.h>
+ #include <linux/nfsacl.h>
++#include <linux/vs_tag.h>
+ #include "internal.h"
+ 
+ #define NFSDBG_FACILITY		NFSDBG_XDR
+@@ -178,7 +179,7 @@ xdr_decode_fattr(__be32 *p, struct nfs_f
+ }
+ 
+ static inline __be32 *
+-xdr_encode_sattr(__be32 *p, struct iattr *attr)
++xdr_encode_sattr(__be32 *p, struct iattr *attr, int tag)
+ {
+ 	if (attr->ia_valid & ATTR_MODE) {
+ 		*p++ = xdr_one;
+@@ -186,15 +187,17 @@ xdr_encode_sattr(__be32 *p, struct iattr
+ 	} else {
+ 		*p++ = xdr_zero;
+ 	}
+-	if (attr->ia_valid & ATTR_UID) {
++	if (attr->ia_valid & ATTR_UID ||
++		(tag && (attr->ia_valid & ATTR_TAG))) {
+ 		*p++ = xdr_one;
+-		*p++ = htonl(attr->ia_uid);
++		*p++ = htonl(TAGINO_UID(tag, attr->ia_uid, attr->ia_tag));
+ 	} else {
+ 		*p++ = xdr_zero;
+ 	}
+-	if (attr->ia_valid & ATTR_GID) {
++	if (attr->ia_valid & ATTR_GID ||
++		(tag && (attr->ia_valid & ATTR_TAG))) {
+ 		*p++ = xdr_one;
+-		*p++ = htonl(attr->ia_gid);
++		*p++ = htonl(TAGINO_GID(tag, attr->ia_gid, attr->ia_tag));
+ 	} else {
+ 		*p++ = xdr_zero;
+ 	}
+@@ -279,7 +282,8 @@ static int
+ nfs3_xdr_sattrargs(struct rpc_rqst *req, __be32 *p, struct nfs3_sattrargs *args)
+ {
+ 	p = xdr_encode_fhandle(p, args->fh);
+-	p = xdr_encode_sattr(p, args->sattr);
++	p = xdr_encode_sattr(p, args->sattr,
++		req->rq_task->tk_client->cl_tag);
+ 	*p++ = htonl(args->guard);
+ 	if (args->guard)
+ 		p = xdr_encode_time3(p, &args->guardtime);
+@@ -370,7 +374,8 @@ nfs3_xdr_createargs(struct rpc_rqst *req
+ 		*p++ = args->verifier[0];
+ 		*p++ = args->verifier[1];
+ 	} else
+-		p = xdr_encode_sattr(p, args->sattr);
++		p = xdr_encode_sattr(p, args->sattr,
++			req->rq_task->tk_client->cl_tag);
+ 
+ 	req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
+ 	return 0;
+@@ -384,7 +389,8 @@ nfs3_xdr_mkdirargs(struct rpc_rqst *req,
+ {
+ 	p = xdr_encode_fhandle(p, args->fh);
+ 	p = xdr_encode_array(p, args->name, args->len);
+-	p = xdr_encode_sattr(p, args->sattr);
++	p = xdr_encode_sattr(p, args->sattr,
++		req->rq_task->tk_client->cl_tag);
+ 	req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
+ 	return 0;
+ }
+@@ -397,7 +403,8 @@ nfs3_xdr_symlinkargs(struct rpc_rqst *re
+ {
+ 	p = xdr_encode_fhandle(p, args->fromfh);
+ 	p = xdr_encode_array(p, args->fromname, args->fromlen);
+-	p = xdr_encode_sattr(p, args->sattr);
++	p = xdr_encode_sattr(p, args->sattr,
++		req->rq_task->tk_client->cl_tag);
+ 	*p++ = htonl(args->pathlen);
+ 	req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
+ 
+@@ -415,7 +422,8 @@ nfs3_xdr_mknodargs(struct rpc_rqst *req,
+ 	p = xdr_encode_fhandle(p, args->fh);
+ 	p = xdr_encode_array(p, args->name, args->len);
+ 	*p++ = htonl(args->type);
+-	p = xdr_encode_sattr(p, args->sattr);
++	p = xdr_encode_sattr(p, args->sattr,
++		req->rq_task->tk_client->cl_tag);
+ 	if (args->type == NF3CHR || args->type == NF3BLK) {
+ 		*p++ = htonl(MAJOR(args->rdev));
+ 		*p++ = htonl(MINOR(args->rdev));
+Index: linux-2.6.20/fs/nfs/nfsroot.c
+===================================================================
+--- linux-2.6.20.orig/fs/nfs/nfsroot.c
++++ linux-2.6.20/fs/nfs/nfsroot.c
+@@ -118,12 +118,12 @@ static int mount_port __initdata = 0;		/
+ enum {
+ 	/* Options that take integer arguments */
+ 	Opt_port, Opt_rsize, Opt_wsize, Opt_timeo, Opt_retrans, Opt_acregmin,
+-	Opt_acregmax, Opt_acdirmin, Opt_acdirmax,
++	Opt_acregmax, Opt_acdirmin, Opt_acdirmax, Opt_tagid,
+ 	/* Options that take no arguments */
+ 	Opt_soft, Opt_hard, Opt_intr,
+ 	Opt_nointr, Opt_posix, Opt_noposix, Opt_cto, Opt_nocto, Opt_ac, 
+ 	Opt_noac, Opt_lock, Opt_nolock, Opt_v2, Opt_v3, Opt_udp, Opt_tcp,
+-	Opt_acl, Opt_noacl,
++	Opt_acl, Opt_noacl, Opt_tag, Opt_notag,
+ 	/* Error token */
+ 	Opt_err
+ };
+@@ -160,6 +160,10 @@ static match_table_t __initdata tokens =
+ 	{Opt_tcp, "tcp"},
+ 	{Opt_acl, "acl"},
+ 	{Opt_noacl, "noacl"},
++	{Opt_tag, "tag"},
++	{Opt_notag, "notag"},
++	{Opt_tagid, "tagid=%u"},
++	{Opt_tag, "tagxid"},
+ 	{Opt_err, NULL}
+ 	
+ };
+@@ -274,6 +278,20 @@ static int __init root_nfs_parse(char *n
+ 			case Opt_noacl:
+ 				nfs_data.flags |= NFS_MOUNT_NOACL;
+ 				break;
++#ifndef CONFIG_TAGGING_NONE
++			case Opt_tag:
++				nfs_data.flags |= NFS_MOUNT_TAGGED;
++				break;
++			case Opt_notag:
++				nfs_data.flags &= ~NFS_MOUNT_TAGGED;
++				break;
++#endif
++#ifdef CONFIG_PROPAGATE
++			case Opt_tagid:
++				/* use args[0] */
++				nfs_data.flags |= NFS_MOUNT_TAGGED;
++				break;
++#endif
+ 			default:
+ 				printk(KERN_WARNING "Root-NFS: unknown "
+ 					"option: %s\n", p);
+Index: linux-2.6.20/fs/nfs/super.c
+===================================================================
+--- linux-2.6.20.orig/fs/nfs/super.c
++++ linux-2.6.20/fs/nfs/super.c
+@@ -44,6 +44,7 @@
+ #include <linux/vfs.h>
+ #include <linux/inet.h>
+ #include <linux/nfs_xdr.h>
++#include <linux/vs_tag.h>
+ 
+ #include <asm/system.h>
+ #include <asm/uaccess.h>
+@@ -290,6 +291,7 @@ static void nfs_show_mount_options(struc
+ 		{ NFS_MOUNT_NOAC, ",noac", "" },
+ 		{ NFS_MOUNT_NONLM, ",nolock", "" },
+ 		{ NFS_MOUNT_NOACL, ",noacl", "" },
++		{ NFS_MOUNT_TAGGED, ",tag", "" },
+ 		{ 0, NULL, NULL }
+ 	};
+ 	const struct proc_nfs_info *nfs_infop;
+Index: linux-2.6.20/fs/nfsd/auth.c
+===================================================================
+--- linux-2.6.20.orig/fs/nfsd/auth.c
++++ linux-2.6.20/fs/nfsd/auth.c
+@@ -9,6 +9,7 @@
+ #include <linux/sunrpc/svc.h>
+ #include <linux/sunrpc/svcauth.h>
+ #include <linux/nfsd/nfsd.h>
++#include <linux/vs_tag.h>
+ 
+ #define	CAP_NFSD_MASK (CAP_FS_MASK|CAP_TO_MASK(CAP_SYS_RESOURCE))
+ 
+@@ -41,19 +42,22 @@ int nfsd_setuser(struct svc_rqst *rqstp,
+ 		get_group_info(cred.cr_group_info);
+ 
+ 	if (cred.cr_uid != (uid_t) -1)
+-		current->fsuid = cred.cr_uid;
++		current->fsuid = INOTAG_UID(DX_TAG_NFSD, cred.cr_uid, cred.cr_gid);
+ 	else
+ 		current->fsuid = exp->ex_anon_uid;
+ 	if (cred.cr_gid != (gid_t) -1)
+-		current->fsgid = cred.cr_gid;
++		current->fsgid = INOTAG_GID(DX_TAG_NFSD, cred.cr_uid, cred.cr_gid);
+ 	else
+ 		current->fsgid = exp->ex_anon_gid;
+ 
++	/* this desperately needs a tag :) */
++	current->xid = (xid_t)INOTAG_TAG(DX_TAG_NFSD, cred.cr_uid, cred.cr_gid, 0);
++
+ 	if (!cred.cr_group_info)
+ 		return -ENOMEM;
+ 	ret = set_current_groups(cred.cr_group_info);
+ 	put_group_info(cred.cr_group_info);
+-	if ((cred.cr_uid)) {
++	if (INOTAG_UID(DX_TAG_NFSD, cred.cr_uid, cred.cr_gid)) {
+ 		cap_t(current->cap_effective) &= ~CAP_NFSD_MASK;
+ 	} else {
+ 		cap_t(current->cap_effective) |= (CAP_NFSD_MASK &
+Index: linux-2.6.20/fs/nfsd/nfs3xdr.c
+===================================================================
+--- linux-2.6.20.orig/fs/nfsd/nfs3xdr.c
++++ linux-2.6.20/fs/nfsd/nfs3xdr.c
+@@ -21,6 +21,7 @@
+ #include <linux/sunrpc/svc.h>
+ #include <linux/nfsd/nfsd.h>
+ #include <linux/nfsd/xdr3.h>
++#include <linux/vs_tag.h>
+ 
+ #define NFSDDBG_FACILITY		NFSDDBG_XDR
+ 
+@@ -107,6 +108,8 @@ static __be32 *
+ decode_sattr3(__be32 *p, struct iattr *iap)
+ {
+ 	u32	tmp;
++	uid_t	uid = 0;
++	gid_t	gid = 0;
+ 
+ 	iap->ia_valid = 0;
+ 
+@@ -116,12 +119,15 @@ decode_sattr3(__be32 *p, struct iattr *i
+ 	}
+ 	if (*p++) {
+ 		iap->ia_valid |= ATTR_UID;
+-		iap->ia_uid = ntohl(*p++);
++		uid = ntohl(*p++);
+ 	}
+ 	if (*p++) {
+ 		iap->ia_valid |= ATTR_GID;
+-		iap->ia_gid = ntohl(*p++);
++		gid = ntohl(*p++);
+ 	}
++	iap->ia_uid = INOTAG_UID(DX_TAG_NFSD, uid, gid);
++	iap->ia_gid = INOTAG_GID(DX_TAG_NFSD, uid, gid);
++	iap->ia_tag = INOTAG_TAG(DX_TAG_NFSD, uid, gid, 0);
+ 	if (*p++) {
+ 		u64	newsize;
+ 
+@@ -159,8 +165,10 @@ encode_fattr3(struct svc_rqst *rqstp, __
+ 	*p++ = htonl(nfs3_ftypes[(stat->mode & S_IFMT) >> 12]);
+ 	*p++ = htonl((u32) stat->mode);
+ 	*p++ = htonl((u32) stat->nlink);
+-	*p++ = htonl((u32) nfsd_ruid(rqstp, stat->uid));
+-	*p++ = htonl((u32) nfsd_rgid(rqstp, stat->gid));
++	*p++ = htonl((u32) nfsd_ruid(rqstp,
++		TAGINO_UID(DX_TAG(dentry->d_inode), stat->uid, stat->tag)));
++	*p++ = htonl((u32) nfsd_rgid(rqstp,
++		TAGINO_GID(DX_TAG(dentry->d_inode), stat->gid, stat->tag)));
+ 	if (S_ISLNK(stat->mode) && stat->size > NFS3_MAXPATHLEN) {
+ 		p = xdr_encode_hyper(p, (u64) NFS3_MAXPATHLEN);
+ 	} else {
+Index: linux-2.6.20/fs/nfsd/nfs4recover.c
+===================================================================
+--- linux-2.6.20.orig/fs/nfsd/nfs4recover.c
++++ linux-2.6.20/fs/nfsd/nfs4recover.c
+@@ -156,7 +156,7 @@ nfsd4_create_clid_dir(struct nfs4_client
+ 		dprintk("NFSD: nfsd4_create_clid_dir: DIRECTORY EXISTS\n");
+ 		goto out_put;
+ 	}
+-	status = vfs_mkdir(rec_dir.dentry->d_inode, dentry, S_IRWXU);
++	status = vfs_mkdir(rec_dir.dentry->d_inode, dentry, S_IRWXU, NULL);
+ out_put:
+ 	dput(dentry);
+ out_unlock:
+@@ -260,7 +260,7 @@ nfsd4_remove_clid_file(struct dentry *di
+ 		return -EINVAL;
+ 	}
+ 	mutex_lock_nested(&dir->d_inode->i_mutex, I_MUTEX_PARENT);
+-	status = vfs_unlink(dir->d_inode, dentry);
++	status = vfs_unlink(dir->d_inode, dentry, NULL);
+ 	mutex_unlock(&dir->d_inode->i_mutex);
+ 	return status;
+ }
+@@ -275,7 +275,7 @@ nfsd4_clear_clid_dir(struct dentry *dir,
+ 	 * a kernel from the future.... */
+ 	nfsd4_list_rec_dir(dentry, nfsd4_remove_clid_file);
+ 	mutex_lock_nested(&dir->d_inode->i_mutex, I_MUTEX_PARENT);
+-	status = vfs_rmdir(dir->d_inode, dentry);
++	status = vfs_rmdir(dir->d_inode, dentry, NULL);
+ 	mutex_unlock(&dir->d_inode->i_mutex);
+ 	return status;
+ }
+Index: linux-2.6.20/fs/nfsd/nfs4xdr.c
+===================================================================
+--- linux-2.6.20.orig/fs/nfsd/nfs4xdr.c
++++ linux-2.6.20/fs/nfsd/nfs4xdr.c
+@@ -57,6 +57,7 @@
+ #include <linux/nfsd_idmap.h>
+ #include <linux/nfs4.h>
+ #include <linux/nfs4_acl.h>
++#include <linux/vs_tag.h>
+ 
+ #define NFSDDBG_FACILITY		NFSDDBG_XDR
+ 
+@@ -1727,14 +1728,18 @@ out_acl:
+ 		WRITE32(stat.nlink);
+ 	}
+ 	if (bmval1 & FATTR4_WORD1_OWNER) {
+-		status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
++		status = nfsd4_encode_user(rqstp,
++			TAGINO_UID(DX_TAG(dentry->d_inode),
++			stat.uid, stat.tag), &p, &buflen);
+ 		if (status == nfserr_resource)
+ 			goto out_resource;
+ 		if (status)
+ 			goto out;
+ 	}
+ 	if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
+-		status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
++		status = nfsd4_encode_group(rqstp,
++			TAGINO_GID(DX_TAG(dentry->d_inode),
++			stat.gid, stat.tag), &p, &buflen);
+ 		if (status == nfserr_resource)
+ 			goto out_resource;
+ 		if (status)
+Index: linux-2.6.20/fs/nfsd/nfsxdr.c
+===================================================================
+--- linux-2.6.20.orig/fs/nfsd/nfsxdr.c
++++ linux-2.6.20/fs/nfsd/nfsxdr.c
+@@ -15,6 +15,7 @@
+ #include <linux/nfsd/nfsd.h>
+ #include <linux/nfsd/xdr.h>
+ #include <linux/mm.h>
++#include <linux/vs_tag.h>
+ 
+ #define NFSDDBG_FACILITY		NFSDDBG_XDR
+ 
+@@ -97,6 +98,8 @@ static __be32 *
+ decode_sattr(__be32 *p, struct iattr *iap)
+ {
+ 	u32	tmp, tmp1;
++	uid_t	uid = 0;
++	gid_t	gid = 0;
+ 
+ 	iap->ia_valid = 0;
+ 
+@@ -110,12 +113,15 @@ decode_sattr(__be32 *p, struct iattr *ia
+ 	}
+ 	if ((tmp = ntohl(*p++)) != (u32)-1) {
+ 		iap->ia_valid |= ATTR_UID;
+-		iap->ia_uid = tmp;
++		uid = tmp;
+ 	}
+ 	if ((tmp = ntohl(*p++)) != (u32)-1) {
+ 		iap->ia_valid |= ATTR_GID;
+-		iap->ia_gid = tmp;
++		gid = tmp;
+ 	}
++	iap->ia_uid = INOTAG_UID(DX_TAG_NFSD, uid, gid);
++	iap->ia_gid = INOTAG_GID(DX_TAG_NFSD, uid, gid);
++	iap->ia_tag = INOTAG_TAG(DX_TAG_NFSD, uid, gid, 0);
+ 	if ((tmp = ntohl(*p++)) != (u32)-1) {
+ 		iap->ia_valid |= ATTR_SIZE;
+ 		iap->ia_size = tmp;
+@@ -159,8 +165,10 @@ encode_fattr(struct svc_rqst *rqstp, __b
+ 	*p++ = htonl(nfs_ftypes[type >> 12]);
+ 	*p++ = htonl((u32) stat->mode);
+ 	*p++ = htonl((u32) stat->nlink);
+-	*p++ = htonl((u32) nfsd_ruid(rqstp, stat->uid));
+-	*p++ = htonl((u32) nfsd_rgid(rqstp, stat->gid));
++	*p++ = htonl((u32) nfsd_ruid(rqstp,
++		TAGINO_UID(DX_TAG(dentry->d_inode), stat->uid, stat->tag)));
++	*p++ = htonl((u32) nfsd_rgid(rqstp,
++		TAGINO_GID(DX_TAG(dentry->d_inode), stat->gid, stat->tag)));
+ 
+ 	if (S_ISLNK(type) && stat->size > NFS_MAXPATHLEN) {
+ 		*p++ = htonl(NFS_MAXPATHLEN);
+Index: linux-2.6.20/fs/nfsd/vfs.c
+===================================================================
+--- linux-2.6.20.orig/fs/nfsd/vfs.c
++++ linux-2.6.20/fs/nfsd/vfs.c
+@@ -1183,13 +1183,13 @@ nfsd_create(struct svc_rqst *rqstp, stru
+ 		host_err = vfs_create(dirp, dchild, iap->ia_mode, NULL);
+ 		break;
+ 	case S_IFDIR:
+-		host_err = vfs_mkdir(dirp, dchild, iap->ia_mode);
++		host_err = vfs_mkdir(dirp, dchild, iap->ia_mode, NULL);
+ 		break;
+ 	case S_IFCHR:
+ 	case S_IFBLK:
+ 	case S_IFIFO:
+ 	case S_IFSOCK:
+-		host_err = vfs_mknod(dirp, dchild, iap->ia_mode, rdev);
++		host_err = vfs_mknod(dirp, dchild, iap->ia_mode, rdev, NULL);
+ 		break;
+ 	default:
+ 	        printk("nfsd: bad file type %o in nfsd_create\n", type);
+@@ -1463,11 +1463,13 @@ nfsd_symlink(struct svc_rqst *rqstp, str
+ 		else {
+ 			strncpy(path_alloced, path, plen);
+ 			path_alloced[plen] = 0;
+-			host_err = vfs_symlink(dentry->d_inode, dnew, path_alloced, mode);
++			host_err = vfs_symlink(dentry->d_inode, dnew,
++				path_alloced, mode, NULL);
+ 			kfree(path_alloced);
+ 		}
+ 	} else
+-		host_err = vfs_symlink(dentry->d_inode, dnew, path, mode);
++		host_err = vfs_symlink(dentry->d_inode, dnew,
++			path, mode, NULL);
+ 
+ 	if (!host_err) {
+ 		if (EX_ISSYNC(fhp->fh_export))
+@@ -1526,7 +1528,7 @@ nfsd_link(struct svc_rqst *rqstp, struct
+ 	dold = tfhp->fh_dentry;
+ 	dest = dold->d_inode;
+ 
+-	host_err = vfs_link(dold, dirp, dnew);
++	host_err = vfs_link(dold, dirp, dnew, NULL);
+ 	if (!host_err) {
+ 		if (EX_ISSYNC(ffhp->fh_export)) {
+ 			err = nfserrno(nfsd_sync_dir(ddir));
+@@ -1691,9 +1693,9 @@ nfsd_unlink(struct svc_rqst *rqstp, stru
+ 			host_err = -EPERM;
+ 		} else
+ #endif
+-		host_err = vfs_unlink(dirp, rdentry);
++		host_err = vfs_unlink(dirp, rdentry, NULL);
+ 	} else { /* It's RMDIR */
+-		host_err = vfs_rmdir(dirp, rdentry);
++		host_err = vfs_rmdir(dirp, rdentry, NULL);
+ 	}
+ 
+ 	dput(rdentry);
+@@ -1804,7 +1806,8 @@ nfsd_permission(struct svc_export *exp, 
+ 	 */
+ 	if (!(acc & MAY_LOCAL_ACCESS))
+ 		if (acc & (MAY_WRITE | MAY_SATTR | MAY_TRUNC)) {
+-			if (EX_RDONLY(exp) || IS_RDONLY(inode))
++			if (EX_RDONLY(exp) || IS_RDONLY(inode)
++				|| MNT_IS_RDONLY(exp->ex_mnt))
+ 				return nfserr_rofs;
+ 			if (/* (acc & MAY_WRITE) && */ IS_IMMUTABLE(inode))
+ 				return nfserr_perm;
+Index: linux-2.6.20/fs/ocfs2/dlm/dlmfs.c
+===================================================================
+--- linux-2.6.20.orig/fs/ocfs2/dlm/dlmfs.c
++++ linux-2.6.20/fs/ocfs2/dlm/dlmfs.c
+@@ -44,6 +44,7 @@
+ #include <linux/string.h>
+ #include <linux/smp_lock.h>
+ #include <linux/backing-dev.h>
++#include <linux/vs_tag.h>
+ 
+ #include <asm/uaccess.h>
+ 
+@@ -335,6 +336,7 @@ static struct inode *dlmfs_get_root_inod
+ 		inode->i_mode = mode;
+ 		inode->i_uid = current->fsuid;
+ 		inode->i_gid = current->fsgid;
++		inode->i_tag = dx_current_fstag(sb);
+ 		inode->i_blocks = 0;
+ 		inode->i_mapping->backing_dev_info = &dlmfs_backing_dev_info;
+ 		inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+@@ -361,6 +363,7 @@ static struct inode *dlmfs_get_inode(str
+ 	inode->i_mode = mode;
+ 	inode->i_uid = current->fsuid;
+ 	inode->i_gid = current->fsgid;
++	inode->i_tag = dx_current_fstag(sb);
+ 	inode->i_blocks = 0;
+ 	inode->i_mapping->backing_dev_info = &dlmfs_backing_dev_info;
+ 	inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+Index: linux-2.6.20/fs/ocfs2/dlmglue.c
+===================================================================
+--- linux-2.6.20.orig/fs/ocfs2/dlmglue.c
++++ linux-2.6.20/fs/ocfs2/dlmglue.c
+@@ -1339,6 +1339,7 @@ static void __ocfs2_stuff_meta_lvb(struc
+ 	lvb->lvb_iclusters = cpu_to_be32(oi->ip_clusters);
+ 	lvb->lvb_iuid      = cpu_to_be32(inode->i_uid);
+ 	lvb->lvb_igid      = cpu_to_be32(inode->i_gid);
++	lvb->lvb_itag      = cpu_to_be16(inode->i_tag);
+ 	lvb->lvb_imode     = cpu_to_be16(inode->i_mode);
+ 	lvb->lvb_inlink    = cpu_to_be16(inode->i_nlink);
+ 	lvb->lvb_iatime_packed  =
+@@ -1392,6 +1393,7 @@ static void ocfs2_refresh_inode_from_lvb
+ 
+ 	inode->i_uid     = be32_to_cpu(lvb->lvb_iuid);
+ 	inode->i_gid     = be32_to_cpu(lvb->lvb_igid);
++	inode->i_tag     = be16_to_cpu(lvb->lvb_itag);
+ 	inode->i_mode    = be16_to_cpu(lvb->lvb_imode);
+ 	inode->i_nlink   = be16_to_cpu(lvb->lvb_inlink);
+ 	ocfs2_unpack_timespec(&inode->i_atime,
+Index: linux-2.6.20/fs/ocfs2/dlmglue.h
+===================================================================
+--- linux-2.6.20.orig/fs/ocfs2/dlmglue.h
++++ linux-2.6.20/fs/ocfs2/dlmglue.h
+@@ -34,7 +34,7 @@
+ struct ocfs2_meta_lvb {
+ 	__u8         lvb_version;
+ 	__u8         lvb_reserved0;
+-	__be16       lvb_reserved1;
++	__be16       lvb_itag;
+ 	__be32       lvb_iclusters;
+ 	__be32       lvb_iuid;
+ 	__be32       lvb_igid;
+Index: linux-2.6.20/fs/ocfs2/file.c
+===================================================================
+--- linux-2.6.20.orig/fs/ocfs2/file.c
++++ linux-2.6.20/fs/ocfs2/file.c
+@@ -858,13 +858,15 @@ int ocfs2_setattr(struct dentry *dentry,
+ 		mlog(0, "uid change: %d\n", attr->ia_uid);
+ 	if (attr->ia_valid & ATTR_GID)
+ 		mlog(0, "gid change: %d\n", attr->ia_gid);
++	if (attr->ia_valid & ATTR_TAG)
++		mlog(0, "tag change: %d\n", attr->ia_tag);
+ 	if (attr->ia_valid & ATTR_SIZE)
+ 		mlog(0, "size change...\n");
+ 	if (attr->ia_valid & (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME))
+ 		mlog(0, "time change...\n");
+ 
+ #define OCFS2_VALID_ATTRS (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME | ATTR_SIZE \
+-			   | ATTR_GID | ATTR_UID | ATTR_MODE)
++			   | ATTR_GID | ATTR_UID | ATTR_TAG | ATTR_MODE)
+ 	if (!(attr->ia_valid & OCFS2_VALID_ATTRS)) {
+ 		mlog(0, "can't handle attrs: 0x%x\n", attr->ia_valid);
+ 		return 0;
+@@ -1368,6 +1370,7 @@ bail:
+ struct inode_operations ocfs2_file_iops = {
+ 	.setattr	= ocfs2_setattr,
+ 	.getattr	= ocfs2_getattr,
++	.sync_flags     = ocfs2_sync_flags,
+ 	.permission	= ocfs2_permission,
+ };
+ 
+Index: linux-2.6.20/fs/ocfs2/inode.c
+===================================================================
+--- linux-2.6.20.orig/fs/ocfs2/inode.c
++++ linux-2.6.20/fs/ocfs2/inode.c
+@@ -29,6 +29,7 @@
+ #include <linux/highmem.h>
+ #include <linux/pagemap.h>
+ #include <linux/smp_lock.h>
++#include <linux/vs_tag.h>
+ 
+ #include <asm/byteorder.h>
+ 
+@@ -43,6 +44,7 @@
+ #include "file.h"
+ #include "heartbeat.h"
+ #include "inode.h"
++#include "ioctl.h"
+ #include "journal.h"
+ #include "namei.h"
+ #include "suballoc.h"
+@@ -78,6 +80,10 @@ void ocfs2_set_inode_flags(struct inode 
+ 
+ 	if (flags & OCFS2_IMMUTABLE_FL)
+ 		inode->i_flags |= S_IMMUTABLE;
++	if (flags & OCFS2_IUNLINK_FL)
++		inode->i_flags |= S_IUNLINK;
++	if (flags & OCFS2_BARRIER_FL)
++		inode->i_flags |= S_BARRIER;
+ 
+ 	if (flags & OCFS2_SYNC_FL)
+ 		inode->i_flags |= S_SYNC;
+@@ -89,6 +95,27 @@ void ocfs2_set_inode_flags(struct inode 
+ 		inode->i_flags |= S_DIRSYNC;
+ }
+ 
++int ocfs2_sync_flags(struct inode *inode)
++{
++	unsigned int oldflags, newflags;
++
++	oldflags = OCFS2_I(inode)->ip_flags;
++	newflags = oldflags & ~(OCFS2_IMMUTABLE_FL |
++		OCFS2_IUNLINK_FL | OCFS2_BARRIER_FL);
++
++	if (IS_IMMUTABLE(inode))
++		newflags |= OCFS2_IMMUTABLE_FL;
++	if (IS_IUNLINK(inode))
++		newflags |= OCFS2_IUNLINK_FL;
++	if (IS_BARRIER(inode))
++		newflags |= OCFS2_BARRIER_FL;
++
++	if (oldflags ^ newflags)
++		return ocfs2_set_inode_attr(inode,
++			newflags, OCFS2_FL_MASK);
++	return 0;
++}
++
+ struct inode *ocfs2_ilookup_for_vote(struct ocfs2_super *osb,
+ 				     u64 blkno,
+ 				     int delete_vote)
+@@ -234,6 +261,8 @@ int ocfs2_populate_inode(struct inode *i
+ 	struct super_block *sb;
+ 	struct ocfs2_super *osb;
+ 	int status = -EINVAL;
++	uid_t uid;
++	gid_t gid;
+ 
+ 	mlog_entry("(0x%p, size:%llu)\n", inode,
+ 		   (unsigned long long)fe->i_size);
+@@ -265,8 +294,12 @@ int ocfs2_populate_inode(struct inode *i
+ 	inode->i_generation = le32_to_cpu(fe->i_generation);
+ 	inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
+ 	inode->i_mode = le16_to_cpu(fe->i_mode);
+-	inode->i_uid = le32_to_cpu(fe->i_uid);
+-	inode->i_gid = le32_to_cpu(fe->i_gid);
++	uid = le32_to_cpu(fe->i_uid);
++	gid = le32_to_cpu(fe->i_gid);
++	inode->i_uid = INOTAG_UID(DX_TAG(inode), uid, gid);
++	inode->i_gid = INOTAG_GID(DX_TAG(inode), uid, gid);
++	inode->i_tag = INOTAG_TAG(DX_TAG(inode), uid, gid,
++		/* le16_to_cpu(raw_inode->i_raw_tag)i */ 0);
+ 
+ 	/* Fast symlinks will have i_size but no allocated clusters. */
+ 	if (S_ISLNK(inode->i_mode) && !fe->i_clusters)
+@@ -1217,8 +1250,11 @@ int ocfs2_mark_inode_dirty(handle_t *han
+ 
+ 	fe->i_size = cpu_to_le64(i_size_read(inode));
+ 	fe->i_links_count = cpu_to_le16(inode->i_nlink);
+-	fe->i_uid = cpu_to_le32(inode->i_uid);
+-	fe->i_gid = cpu_to_le32(inode->i_gid);
++	fe->i_uid = cpu_to_le32(TAGINO_UID(DX_TAG(inode),
++		inode->i_uid, inode->i_tag));
++	fe->i_gid = cpu_to_le32(TAGINO_GID(DX_TAG(inode),
++		inode->i_gid, inode->i_tag));
++	/* i_tag = = cpu_to_le16(inode->i_tag); */
+ 	fe->i_mode = cpu_to_le16(inode->i_mode);
+ 	fe->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
+ 	fe->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
+@@ -1246,15 +1282,24 @@ leave:
+ void ocfs2_refresh_inode(struct inode *inode,
+ 			 struct ocfs2_dinode *fe)
+ {
++	uid_t uid;
++	gid_t gid;
++
+ 	spin_lock(&OCFS2_I(inode)->ip_lock);
+ 
+ 	OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
+ 	OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr);
++	/* OCFS2_I(inode)->ip_flags &= ~OCFS2_FL_MASK;
++	   OCFS2_I(inode)->ip_flags |= le32_to_cpu(fe->i_flags) & OCFS2_FL_MASK; */
+ 	ocfs2_set_inode_flags(inode);
+ 	i_size_write(inode, le64_to_cpu(fe->i_size));
+ 	inode->i_nlink = le16_to_cpu(fe->i_links_count);
+-	inode->i_uid = le32_to_cpu(fe->i_uid);
+-	inode->i_gid = le32_to_cpu(fe->i_gid);
++	uid = le32_to_cpu(fe->i_uid);
++	gid = le32_to_cpu(fe->i_gid);
++	inode->i_uid = INOTAG_UID(DX_TAG(inode), uid, gid);
++	inode->i_gid = INOTAG_GID(DX_TAG(inode), uid, gid);
++	inode->i_tag = INOTAG_TAG(DX_TAG(inode), uid, gid,
++		/* le16_to_cpu(raw_inode->i_raw_tag)i */ 0);
+ 	inode->i_mode = le16_to_cpu(fe->i_mode);
+ 	if (S_ISLNK(inode->i_mode) && le32_to_cpu(fe->i_clusters) == 0)
+ 		inode->i_blocks = 0;
+Index: linux-2.6.20/fs/ocfs2/inode.h
+===================================================================
+--- linux-2.6.20.orig/fs/ocfs2/inode.h
++++ linux-2.6.20/fs/ocfs2/inode.h
+@@ -143,5 +143,6 @@ int ocfs2_aio_read(struct file *file, st
+ int ocfs2_aio_write(struct file *file, struct kiocb *req, struct iocb *iocb);
+ 
+ void ocfs2_set_inode_flags(struct inode *inode);
++int ocfs2_sync_flags(struct inode *inode);
+ 
+ #endif /* OCFS2_INODE_H */
+Index: linux-2.6.20/fs/ocfs2/ioctl.c
+===================================================================
+--- linux-2.6.20.orig/fs/ocfs2/ioctl.c
++++ linux-2.6.20/fs/ocfs2/ioctl.c
+@@ -38,7 +38,7 @@ static int ocfs2_get_inode_attr(struct i
+ 	return status;
+ }
+ 
+-static int ocfs2_set_inode_attr(struct inode *inode, unsigned flags,
++int ocfs2_set_inode_attr(struct inode *inode, unsigned flags,
+ 				unsigned mask)
+ {
+ 	struct ocfs2_inode_info *ocfs2_inode = OCFS2_I(inode);
+Index: linux-2.6.20/fs/ocfs2/ioctl.h
+===================================================================
+--- linux-2.6.20.orig/fs/ocfs2/ioctl.h
++++ linux-2.6.20/fs/ocfs2/ioctl.h
+@@ -10,6 +10,9 @@
+ #ifndef OCFS2_IOCTL_H
+ #define OCFS2_IOCTL_H
+ 
++int ocfs2_set_inode_attr(struct inode *inode, unsigned flags,
++				unsigned mask);
++
+ int ocfs2_ioctl(struct inode * inode, struct file * filp,
+ 	unsigned int cmd, unsigned long arg);
+ 
+Index: linux-2.6.20/fs/ocfs2/namei.c
+===================================================================
+--- linux-2.6.20.orig/fs/ocfs2/namei.c
++++ linux-2.6.20/fs/ocfs2/namei.c
+@@ -40,6 +40,7 @@
+ #include <linux/types.h>
+ #include <linux/slab.h>
+ #include <linux/highmem.h>
++#include <linux/vs_tag.h>
+ 
+ #define MLOG_MASK_PREFIX ML_NAMEI
+ #include <cluster/masklog.h>
+@@ -486,6 +487,9 @@ static int ocfs2_mknod_locked(struct ocf
+ 	u64 fe_blkno = 0;
+ 	u16 suballoc_bit;
+ 	struct inode *inode = NULL;
++	uid_t uid;
++	gid_t gid;
++	tag_t tag;
+ 
+ 	mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode,
+ 		   (unsigned long)dev, dentry->d_name.len,
+@@ -545,13 +549,19 @@ static int ocfs2_mknod_locked(struct ocf
+ 	fe->i_blkno = cpu_to_le64(fe_blkno);
+ 	fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
+ 	fe->i_suballoc_slot = cpu_to_le16(osb->slot_num);
+-	fe->i_uid = cpu_to_le32(current->fsuid);
++
++	tag = dx_current_fstag(osb->sb);
++	uid = current->fsuid;
+ 	if (dir->i_mode & S_ISGID) {
+-		fe->i_gid = cpu_to_le32(dir->i_gid);
++		gid = dir->i_gid;
+ 		if (S_ISDIR(mode))
+ 			mode |= S_ISGID;
+ 	} else
+-		fe->i_gid = cpu_to_le32(current->fsgid);
++		gid = current->fsgid;
++
++	fe->i_uid = cpu_to_le32(TAGINO_UID(DX_TAG(inode), uid, tag));
++	fe->i_gid = cpu_to_le32(TAGINO_GID(DX_TAG(inode), gid, tag));
++	inode->i_tag = tag;
+ 	fe->i_mode = cpu_to_le16(mode);
+ 	if (S_ISCHR(mode) || S_ISBLK(mode))
+ 		fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
+@@ -2318,5 +2328,6 @@ struct inode_operations ocfs2_dir_iops =
+ 	.rename		= ocfs2_rename,
+ 	.setattr	= ocfs2_setattr,
+ 	.getattr	= ocfs2_getattr,
++	.sync_flags     = ocfs2_sync_flags,
+ 	.permission	= ocfs2_permission,
+ };
+Index: linux-2.6.20/fs/ocfs2/ocfs2.h
+===================================================================
+--- linux-2.6.20.orig/fs/ocfs2/ocfs2.h
++++ linux-2.6.20/fs/ocfs2/ocfs2.h
+@@ -175,6 +175,7 @@ enum ocfs2_mount_options
+ 	OCFS2_MOUNT_NOINTR  = 1 << 2,   /* Don't catch signals */
+ 	OCFS2_MOUNT_ERRORS_PANIC = 1 << 3, /* Panic on errors */
+ 	OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4, /* No data ordering */
++	OCFS2_MOUNT_TAGGED = 1 << 8, /* use tagging */
+ };
+ 
+ #define OCFS2_OSB_SOFT_RO	0x0001
+Index: linux-2.6.20/fs/ocfs2/ocfs2_fs.h
+===================================================================
+--- linux-2.6.20.orig/fs/ocfs2/ocfs2_fs.h
++++ linux-2.6.20/fs/ocfs2/ocfs2_fs.h
+@@ -151,8 +151,12 @@
+ #define OCFS2_NOATIME_FL	(0x00000080)	/* do not update atime */
+ #define OCFS2_DIRSYNC_FL	(0x00010000)	/* dirsync behaviour (directories only) */
+ 
++#define OCFS2_BARRIER_FL	(0x04000000)	/* Barrier for chroot() */
++#define OCFS2_IUNLINK_FL	(0x08000000)	/* Immutable unlink */
++
+ #define OCFS2_FL_VISIBLE	(0x000100FF)	/* User visible flags */
+ #define OCFS2_FL_MODIFIABLE	(0x000100FF)	/* User modifiable flags */
++#define OCFS2_FL_MASK		(0x0F0100FF)
+ 
+ /*
+  * ioctl commands
+Index: linux-2.6.20/fs/ocfs2/super.c
+===================================================================
+--- linux-2.6.20.orig/fs/ocfs2/super.c
++++ linux-2.6.20/fs/ocfs2/super.c
+@@ -140,6 +140,7 @@ enum {
+ 	Opt_data_ordered,
+ 	Opt_data_writeback,
+ 	Opt_atime_quantum,
++	Opt_tag, Opt_notag, Opt_tagid,
+ 	Opt_err,
+ };
+ 
+@@ -154,6 +155,10 @@ static match_table_t tokens = {
+ 	{Opt_data_ordered, "data=ordered"},
+ 	{Opt_data_writeback, "data=writeback"},
+ 	{Opt_atime_quantum, "atime_quantum=%u"},
++	{Opt_tag, "tag"},
++	{Opt_tag, "tagxid"},
++	{Opt_notag, "notag"},
++	{Opt_tagid, "tagid=%u"},
+ 	{Opt_err, NULL}
+ };
+ 
+@@ -362,6 +367,14 @@ static int ocfs2_remount(struct super_bl
+ 		goto out;
+ 	}
+ 
++	printk("ocfs2_remount: %lx,%lx\n", osb->s_mount_opt, sb->s_flags);
++	if ((parsed_options & OCFS2_MOUNT_TAGGED) &&
++		!(sb->s_flags & MS_TAGGED)) {
++		ret = -EINVAL;
++		mlog(ML_ERROR, "Cannot change tagging on remount\n");
++		goto out;
++	}
++
+ 	if ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) !=
+ 	    (parsed_options & OCFS2_MOUNT_HB_LOCAL)) {
+ 		ret = -EINVAL;
+@@ -654,6 +667,9 @@ static int ocfs2_fill_super(struct super
+ 
+ 	ocfs2_complete_mount_recovery(osb);
+ 
++	if (osb->s_mount_opt & OCFS2_MOUNT_TAGGED)
++		sb->s_flags |= MS_TAGGED;
++
+ 	if (ocfs2_mount_local(osb))
+ 		snprintf(nodestr, sizeof(nodestr), "local");
+ 	else
+@@ -782,6 +798,20 @@ static int ocfs2_parse_options(struct su
+ 			else
+ 				osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
+ 			break;
++#ifndef CONFIG_TAGGING_NONE
++		case Opt_tag:
++			*mount_opt |= OCFS2_MOUNT_TAGGED;
++			break;
++		case Opt_notag:
++			*mount_opt &= ~OCFS2_MOUNT_TAGGED;
++			break;
++#endif
++#ifdef CONFIG_PROPAGATE
++		case Opt_tagid:
++			/* use args[0] */
++			*mount_opt |= OCFS2_MOUNT_TAGGED;
++			break;
++#endif
+ 		default:
+ 			mlog(ML_ERROR,
+ 			     "Unrecognized mount option \"%s\" "
+Index: linux-2.6.20/fs/open.c
+===================================================================
+--- linux-2.6.20.orig/fs/open.c
++++ linux-2.6.20/fs/open.c
+@@ -27,22 +27,31 @@
+ #include <linux/syscalls.h>
+ #include <linux/rcupdate.h>
+ #include <linux/audit.h>
++#include <linux/vs_base.h>
++#include <linux/vs_limit.h>
++#include <linux/vs_dlimit.h>
++#include <linux/vs_tag.h>
++#include <linux/vs_cowbl.h>
+ 
+ int vfs_statfs(struct dentry *dentry, struct kstatfs *buf)
+ {
+ 	int retval = -ENODEV;
+ 
+ 	if (dentry) {
++		struct super_block *sb = dentry->d_sb;
++
+ 		retval = -ENOSYS;
+-		if (dentry->d_sb->s_op->statfs) {
++		if (sb->s_op->statfs) {
+ 			memset(buf, 0, sizeof(*buf));
+ 			retval = security_sb_statfs(dentry);
+ 			if (retval)
+ 				return retval;
+-			retval = dentry->d_sb->s_op->statfs(dentry, buf);
++			retval = sb->s_op->statfs(dentry, buf);
+ 			if (retval == 0 && buf->f_frsize == 0)
+ 				buf->f_frsize = buf->f_bsize;
+ 		}
++		if (!vx_check(0, VS_ADMIN|VS_WATCH))
++			vx_vsi_statfs(sb, buf);
+ 	}
+ 	return retval;
+ }
+@@ -246,7 +255,7 @@ static long do_sys_truncate(const char _
+ 		goto dput_and_out;
+ 
+ 	error = -EROFS;
+-	if (IS_RDONLY(inode))
++	if (IS_RDONLY(inode) || MNT_IS_RDONLY(nd.mnt))
+ 		goto dput_and_out;
+ 
+ 	error = -EPERM;
+@@ -395,7 +404,7 @@ asmlinkage long sys_faccessat(int dfd, c
+ 	   special_file(nd.dentry->d_inode->i_mode))
+ 		goto out_path_release;
+ 
+-	if(IS_RDONLY(nd.dentry->d_inode))
++	if(IS_RDONLY(nd.dentry->d_inode) || MNT_IS_RDONLY(nd.mnt))
+ 		res = -EROFS;
+ 
+ out_path_release:
+@@ -509,7 +518,7 @@ asmlinkage long sys_fchmod(unsigned int 
+ 	audit_inode(NULL, inode);
+ 
+ 	err = -EROFS;
+-	if (IS_RDONLY(inode))
++	if (IS_RDONLY(inode) || MNT_IS_RDONLY(file->f_vfsmnt))
+ 		goto out_putf;
+ 	err = -EPERM;
+ 	if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
+@@ -539,11 +548,11 @@ asmlinkage long sys_fchmodat(int dfd, co
+ 	error = __user_walk_fd(dfd, filename, LOOKUP_FOLLOW, &nd);
+ 	if (error)
+ 		goto out;
+-	inode = nd.dentry->d_inode;
+ 
+-	error = -EROFS;
+-	if (IS_RDONLY(inode))
++	error = cow_check_and_break(&nd);
++	if (error)
+ 		goto dput_and_out;
++	inode = nd.dentry->d_inode;
+ 
+ 	error = -EPERM;
+ 	if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
+@@ -568,7 +577,8 @@ asmlinkage long sys_chmod(const char __u
+ 	return sys_fchmodat(AT_FDCWD, filename, mode);
+ }
+ 
+-static int chown_common(struct dentry * dentry, uid_t user, gid_t group)
++static int chown_common(struct dentry *dentry, struct vfsmount *mnt,
++	uid_t user, gid_t group)
+ {
+ 	struct inode * inode;
+ 	int error;
+@@ -580,7 +590,7 @@ static int chown_common(struct dentry * 
+ 		goto out;
+ 	}
+ 	error = -EROFS;
+-	if (IS_RDONLY(inode))
++	if (IS_RDONLY(inode) || MNT_IS_RDONLY(mnt))
+ 		goto out;
+ 	error = -EPERM;
+ 	if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
+@@ -588,11 +598,11 @@ static int chown_common(struct dentry * 
+ 	newattrs.ia_valid =  ATTR_CTIME;
+ 	if (user != (uid_t) -1) {
+ 		newattrs.ia_valid |= ATTR_UID;
+-		newattrs.ia_uid = user;
++		newattrs.ia_uid = dx_map_uid(user);
+ 	}
+ 	if (group != (gid_t) -1) {
+ 		newattrs.ia_valid |= ATTR_GID;
+-		newattrs.ia_gid = group;
++		newattrs.ia_gid = dx_map_gid(group);
+ 	}
+ 	if (!S_ISDIR(inode->i_mode))
+ 		newattrs.ia_valid |= ATTR_KILL_SUID|ATTR_KILL_SGID;
+@@ -611,7 +621,11 @@ asmlinkage long sys_chown(const char __u
+ 	error = user_path_walk(filename, &nd);
+ 	if (error)
+ 		goto out;
+-	error = chown_common(nd.dentry, user, group);
++#ifdef CONFIG_VSERVER_COWBL
++	error = cow_check_and_break(&nd);
++	if (!error)
++#endif
++		error = chown_common(nd.dentry, nd.mnt, user, group);
+ 	path_release(&nd);
+ out:
+ 	return error;
+@@ -631,7 +645,11 @@ asmlinkage long sys_fchownat(int dfd, co
+ 	error = __user_walk_fd(dfd, filename, follow, &nd);
+ 	if (error)
+ 		goto out;
+-	error = chown_common(nd.dentry, user, group);
++#ifdef CONFIG_VSERVER_COWBL
++	error = cow_check_and_break(&nd);
++	if (!error)
++#endif
++		error = chown_common(nd.dentry, nd.mnt, user, group);
+ 	path_release(&nd);
+ out:
+ 	return error;
+@@ -645,7 +663,11 @@ asmlinkage long sys_lchown(const char __
+ 	error = user_path_walk_link(filename, &nd);
+ 	if (error)
+ 		goto out;
+-	error = chown_common(nd.dentry, user, group);
++#ifdef CONFIG_VSERVER_COWBL
++	error = cow_check_and_break(&nd);
++	if (!error)
++#endif
++		error = chown_common(nd.dentry, nd.mnt, user, group);
+ 	path_release(&nd);
+ out:
+ 	return error;
+@@ -664,7 +686,7 @@ asmlinkage long sys_fchown(unsigned int 
+ 
+ 	dentry = file->f_path.dentry;
+ 	audit_inode(NULL, dentry->d_inode);
+-	error = chown_common(dentry, user, group);
++	error = chown_common(dentry, file->f_vfsmnt, user, group);
+ 	fput(file);
+ out:
+ 	return error;
+@@ -891,6 +913,7 @@ repeat:
+ 	FD_SET(fd, fdt->open_fds);
+ 	FD_CLR(fd, fdt->close_on_exec);
+ 	files->next_fd = fd + 1;
++	vx_openfd_inc(fd);
+ #if 1
+ 	/* Sanity check */
+ 	if (fdt->fd[fd] != NULL) {
+@@ -913,6 +936,7 @@ static void __put_unused_fd(struct files
+ 	__FD_CLR(fd, fdt->open_fds);
+ 	if (fd < files->next_fd)
+ 		files->next_fd = fd;
++	vx_openfd_dec(fd);
+ }
+ 
+ void fastcall put_unused_fd(unsigned int fd)
+Index: linux-2.6.20/fs/proc/array.c
+===================================================================
+--- linux-2.6.20.orig/fs/proc/array.c
++++ linux-2.6.20/fs/proc/array.c
+@@ -75,6 +75,8 @@
+ #include <linux/cpuset.h>
+ #include <linux/rcupdate.h>
+ #include <linux/delayacct.h>
++#include <linux/vs_context.h>
++#include <linux/vs_network.h>
+ 
+ #include <asm/uaccess.h>
+ #include <asm/pgtable.h>
+@@ -134,8 +136,9 @@ static const char *task_state_array[] = 
+ 	"D (disk sleep)",	/*  2 */
+ 	"T (stopped)",		/*  4 */
+ 	"T (tracing stop)",	/*  8 */
+-	"Z (zombie)",		/* 16 */
+-	"X (dead)"		/* 32 */
++	"H (on hold)",		/* 16 */
++	"Z (zombie)",		/* 32 */
++	"X (dead)",		/* 64 */
+ };
+ 
+ static inline const char * get_task_state(struct task_struct *tsk)
+@@ -144,7 +147,8 @@ static inline const char * get_task_stat
+ 					    TASK_INTERRUPTIBLE |
+ 					    TASK_UNINTERRUPTIBLE |
+ 					    TASK_STOPPED |
+-					    TASK_TRACED)) |
++					   TASK_TRACED |
++					   TASK_ONHOLD)) |
+ 			(tsk->exit_state & (EXIT_ZOMBIE |
+ 					    EXIT_DEAD));
+ 	const char **p = &task_state_array[0];
+@@ -161,8 +165,16 @@ static inline char * task_state(struct t
+ 	struct group_info *group_info;
+ 	int g;
+ 	struct fdtable *fdt = NULL;
++	pid_t pid, ptgid, tppid, tgid;
+ 
+ 	rcu_read_lock();
++	tgid = vx_map_tgid(p->tgid);
++	pid = vx_map_pid(p->pid);
++	ptgid = vx_map_pid(pid_alive(p) ?
++		rcu_dereference(p->real_parent)->tgid : 0);
++	tppid = vx_map_pid(pid_alive(p) && p->ptrace ?
++		rcu_dereference(p->parent)->pid : 0);
++
+ 	buffer += sprintf(buffer,
+ 		"State:\t%s\n"
+ 		"SleepAVG:\t%lu%%\n"
+@@ -174,9 +186,7 @@ static inline char * task_state(struct t
+ 		"Gid:\t%d\t%d\t%d\t%d\n",
+ 		get_task_state(p),
+ 		(p->sleep_avg/1024)*100/(1020000000/1024),
+-	       	p->tgid, p->pid,
+-	       	pid_alive(p) ? rcu_dereference(p->real_parent)->tgid : 0,
+-		pid_alive(p) && p->ptrace ? rcu_dereference(p->parent)->pid : 0,
++		tgid, pid, (pid > 1) ? ptgid : 0, tppid,
+ 		p->uid, p->euid, p->suid, p->fsuid,
+ 		p->gid, p->egid, p->sgid, p->fsgid);
+ 
+@@ -283,12 +293,15 @@ static inline char * task_sig(struct tas
+ 
+ static inline char *task_cap(struct task_struct *p, char *buffer)
+ {
+-    return buffer + sprintf(buffer, "CapInh:\t%016x\n"
+-			    "CapPrm:\t%016x\n"
+-			    "CapEff:\t%016x\n",
+-			    cap_t(p->cap_inheritable),
+-			    cap_t(p->cap_permitted),
+-			    cap_t(p->cap_effective));
++	struct vx_info *vxi = p->vx_info;
++
++	return buffer + sprintf(buffer,
++		"CapInh:\t%016x\n"
++		"CapPrm:\t%016x\n"
++		"CapEff:\t%016x\n",
++		(unsigned)vx_info_mbcap(vxi, p->cap_inheritable),
++		(unsigned)vx_info_mbcap(vxi, p->cap_permitted),
++		(unsigned)vx_info_mbcap(vxi, p->cap_effective));
+ }
+ 
+ int proc_pid_status(struct task_struct *task, char * buffer)
+@@ -306,6 +319,12 @@ int proc_pid_status(struct task_struct *
+ 	buffer = task_sig(task, buffer);
+ 	buffer = task_cap(task, buffer);
+ 	buffer = cpuset_task_status_allowed(task, buffer);
++
++	if (task_vx_flags(task, VXF_HIDE_VINFO, 0))
++		goto skip;
++	buffer += sprintf (buffer,"VxID: %d\n", vx_task_xid(task));
++	buffer += sprintf (buffer,"NxID: %d\n", nx_task_nid(task));
++skip:
+ #if defined(CONFIG_S390)
+ 	buffer = task_show_regs(task, buffer);
+ #endif
+@@ -320,7 +339,7 @@ static int do_task_stat(struct task_stru
+ 	sigset_t sigign, sigcatch;
+ 	char state;
+ 	int res;
+- 	pid_t ppid = 0, pgid = -1, sid = -1;
++	pid_t pid = 0, ppid = 0, pgid = -1, sid = -1;
+ 	int num_threads = 0;
+ 	struct mm_struct *mm;
+ 	unsigned long long start_time;
+@@ -382,8 +401,10 @@ static int do_task_stat(struct task_stru
+ 		}
+ 
+ 		sid = signal_session(sig);
+-		pgid = process_group(task);
+-		ppid = rcu_dereference(task->real_parent)->tgid;
++		pid = vx_info_map_pid(task->vx_info, task->pid);
++		pgid = vx_info_map_pid(task->vx_info, process_group(task));
++		ppid = (pid > 1) ? vx_info_map_tgid(task->vx_info,
++			rcu_dereference(task->real_parent)->tgid) : 0;
+ 
+ 		unlock_task_sighand(task, &flags);
+ 	}
+@@ -410,10 +431,21 @@ static int do_task_stat(struct task_stru
+ 	/* convert nsec -> ticks */
+ 	start_time = nsec_to_clock_t(start_time);
+ 
++	/* fixup start time for virt uptime */
++	if (vx_flags(VXF_VIRT_UPTIME, 0)) {
++		unsigned long long bias =
++			current->vx_info->cvirt.bias_clock;
++
++		if (start_time > bias)
++			start_time -= bias;
++		else
++			start_time = 0;
++	}
++
+ 	res = sprintf(buffer,"%d (%s) %c %d %d %d %d %d %lu %lu \
+ %lu %lu %lu %lu %lu %ld %ld %ld %ld %d 0 %llu %lu %ld %lu %lu %lu %lu %lu \
+ %lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %lu %llu\n",
+-		task->pid,
++		pid,
+ 		tcomm,
+ 		state,
+ 		ppid,
+Index: linux-2.6.20/fs/proc/base.c
+===================================================================
+--- linux-2.6.20.orig/fs/proc/base.c
++++ linux-2.6.20/fs/proc/base.c
+@@ -73,6 +73,9 @@
+ #include <linux/poll.h>
+ #include <linux/nsproxy.h>
+ #include <linux/oom.h>
++#include <linux/vs_context.h>
++#include <linux/vs_network.h>
++
+ #include "internal.h"
+ 
+ /* NOTE:
+@@ -1034,6 +1037,8 @@ static struct inode *proc_pid_make_inode
+ 		inode->i_uid = task->euid;
+ 		inode->i_gid = task->egid;
+ 	}
++	/* procfs is xid tagged */
++	inode->i_tag = (tag_t)vx_task_xid(task);
+ 	security_task_to_inode(task, inode);
+ 
+ out:
+@@ -1086,7 +1091,13 @@ static int pid_revalidate(struct dentry 
+ {
+ 	struct inode *inode = dentry->d_inode;
+ 	struct task_struct *task = get_proc_task(inode);
++	int ret = 0;
++
+ 	if (task) {
++		if (!vx_proc_task_visible(task))
++			goto out_put;
++
++		ret = 1;
+ 		if ((inode->i_mode == (S_IFDIR|S_IRUGO|S_IXUGO)) ||
+ 		    task_dumpable(task)) {
+ 			inode->i_uid = task->euid;
+@@ -1097,11 +1108,12 @@ static int pid_revalidate(struct dentry 
+ 		}
+ 		inode->i_mode &= ~(S_ISUID | S_ISGID);
+ 		security_task_to_inode(task, inode);
++	out_put:
+ 		put_task_struct(task);
+-		return 1;
+ 	}
+-	d_drop(dentry);
+-	return 0;
++	if (!ret)
++		d_drop(dentry);
++	return ret;
+ }
+ 
+ static int pid_delete_dentry(struct dentry * dentry)
+@@ -1467,6 +1479,13 @@ static struct dentry *proc_pident_lookup
+ 	if (!task)
+ 		goto out_no_task;
+ 
++	/* TODO: maybe we can come up with a generic approach? */
++	if (task_vx_flags(task, VXF_HIDE_VINFO, 0) &&
++		(dentry->d_name.len == 5) &&
++		(!memcmp(dentry->d_name.name, "vinfo", 5) ||
++		!memcmp(dentry->d_name.name, "ninfo", 5)))
++		goto out;
++
+ 	/*
+ 	 * Yes, it does not scale. And it should not. Don't add
+ 	 * new entries into /proc/<tgid>/ without very good reasons.
+@@ -1671,14 +1690,14 @@ static int proc_self_readlink(struct den
+ 			      int buflen)
+ {
+ 	char tmp[PROC_NUMBUF];
+-	sprintf(tmp, "%d", current->tgid);
++	sprintf(tmp, "%d", vx_map_tgid(current->tgid));
+ 	return vfs_readlink(dentry,buffer,buflen,tmp);
+ }
+ 
+ static void *proc_self_follow_link(struct dentry *dentry, struct nameidata *nd)
+ {
+ 	char tmp[PROC_NUMBUF];
+-	sprintf(tmp, "%d", current->tgid);
++	sprintf(tmp, "%d", vx_map_tgid(current->tgid));
+ 	return ERR_PTR(vfs_follow_link(nd,tmp));
+ }
+ 
+@@ -1772,7 +1791,7 @@ out_iput:
+ static struct dentry *proc_base_lookup(struct inode *dir, struct dentry *dentry)
+ {
+ 	struct dentry *error;
+-	struct task_struct *task = get_proc_task(dir);
++	struct task_struct *task = get_proc_task_real(dir);
+ 	struct pid_entry *p, *last;
+ 
+ 	error = ERR_PTR(-ENOENT);
+@@ -1833,6 +1852,9 @@ static int proc_pid_io_accounting(struct
+ static struct file_operations proc_task_operations;
+ static struct inode_operations proc_task_inode_operations;
+ 
++extern int proc_pid_vx_info(struct task_struct *, char *);
++extern int proc_pid_nx_info(struct task_struct *, char *);
++
+ static struct pid_entry tgid_base_stuff[] = {
+ 	DIR("task",       S_IRUGO|S_IXUGO, task),
+ 	DIR("fd",         S_IRUSR|S_IXUSR, fd),
+@@ -1870,6 +1892,8 @@ static struct pid_entry tgid_base_stuff[
+ #ifdef CONFIG_CPUSETS
+ 	REG("cpuset",     S_IRUGO, cpuset),
+ #endif
++	INF("vinfo",      S_IRUGO, pid_vx_info),
++	INF("ninfo",	  S_IRUGO, pid_nx_info),
+ 	INF("oom_score",  S_IRUGO, oom_score),
+ 	REG("oom_adj",    S_IRUGO|S_IWUSR, oom_adjust),
+ #ifdef CONFIG_AUDITSYSCALL
+@@ -2018,7 +2042,7 @@ struct dentry *proc_pid_lookup(struct in
+ 		goto out;
+ 
+ 	rcu_read_lock();
+-	task = find_task_by_pid(tgid);
++	task = vx_find_proc_task_by_pid(tgid);
+ 	if (task)
+ 		get_task_struct(task);
+ 	rcu_read_unlock();
+@@ -2082,7 +2106,7 @@ static int proc_pid_fill_cache(struct fi
+ int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir)
+ {
+ 	unsigned int nr = filp->f_pos - FIRST_PROCESS_ENTRY;
+-	struct task_struct *reaper = get_proc_task(filp->f_path.dentry->d_inode);
++	struct task_struct *reaper = get_proc_task_real(filp->f_path.dentry->d_inode);
+ 	struct task_struct *task;
+ 	int tgid;
+ 
+@@ -2101,7 +2125,10 @@ int proc_pid_readdir(struct file * filp,
+ 	     put_task_struct(task), task = next_tgid(tgid + 1)) {
+ 		tgid = task->pid;
+ 		filp->f_pos = tgid + TGID_OFFSET;
+-		if (proc_pid_fill_cache(filp, dirent, filldir, task, tgid) < 0) {
++		if (!vx_proc_task_visible(task))
++			continue;
++		if (proc_pid_fill_cache(filp, dirent, filldir, task,
++			vx_map_tgid(tgid)) < 0) {
+ 			put_task_struct(task);
+ 			goto out;
+ 		}
+@@ -2225,9 +2252,11 @@ static struct dentry *proc_task_lookup(s
+ 	tid = name_to_int(dentry);
+ 	if (tid == ~0U)
+ 		goto out;
++	if (vx_current_initpid(tid))
++		goto out;
+ 
+ 	rcu_read_lock();
+-	task = find_task_by_pid(tid);
++	task = vx_find_proc_task_by_pid(tid);
+ 	if (task)
+ 		get_task_struct(task);
+ 	rcu_read_unlock();
+@@ -2372,7 +2401,11 @@ static int proc_task_readdir(struct file
+ 	for (task = first_tid(leader, tid, pos - 2);
+ 	     task;
+ 	     task = next_tid(task), pos++) {
+-		tid = task->pid;
++		tid = vx_map_pid(task->pid);
++		/* FIXME: could go away now
++		if (!vx_proc_task_visible(task))
++			continue; */
++		WARN_ON(!vx_proc_task_visible(task));
+ 		if (proc_task_fill_cache(filp, dirent, filldir, task, tid) < 0) {
+ 			/* returning this tgid failed, save it as the first
+ 			 * pid for the next readir call */
+Index: linux-2.6.20/fs/proc/generic.c
+===================================================================
+--- linux-2.6.20.orig/fs/proc/generic.c
++++ linux-2.6.20/fs/proc/generic.c
+@@ -20,6 +20,7 @@
+ #include <linux/namei.h>
+ #include <linux/bitops.h>
+ #include <linux/spinlock.h>
++#include <linux/vserver/inode.h>
+ #include <asm/uaccess.h>
+ 
+ #include "internal.h"
+@@ -395,12 +396,16 @@ struct dentry *proc_lookup(struct inode 
+ 		for (de = de->subdir; de ; de = de->next) {
+ 			if (de->namelen != dentry->d_name.len)
+ 				continue;
++			if (!vx_hide_check(0, de->vx_flags))
++				continue;
+ 			if (!memcmp(dentry->d_name.name, de->name, de->namelen)) {
+ 				unsigned int ino = de->low_ino;
+ 
+ 				spin_unlock(&proc_subdir_lock);
+ 				error = -EINVAL;
+ 				inode = proc_get_inode(dir->i_sb, ino, de);
++				/* generic proc entries belong to the host */
++				inode->i_tag = 0;
+ 				spin_lock(&proc_subdir_lock);
+ 				break;
+ 			}
+@@ -476,12 +481,15 @@ int proc_readdir(struct file * filp,
+ 			}
+ 
+ 			do {
++				if (!vx_hide_check(0, de->vx_flags))
++					goto skip;
+ 				/* filldir passes info to user space */
+ 				spin_unlock(&proc_subdir_lock);
+ 				if (filldir(dirent, de->name, de->namelen, filp->f_pos,
+ 					    de->low_ino, de->mode >> 12) < 0)
+ 					goto out;
+ 				spin_lock(&proc_subdir_lock);
++			skip:
+ 				filp->f_pos++;
+ 				de = de->next;
+ 			} while (de);
+@@ -604,6 +612,7 @@ static struct proc_dir_entry *proc_creat
+ 	ent->namelen = len;
+ 	ent->mode = mode;
+ 	ent->nlink = nlink;
++	ent->vx_flags = IATTR_PROC_DEFAULT;
+  out:
+ 	return ent;
+ }
+@@ -624,7 +633,8 @@ struct proc_dir_entry *proc_symlink(cons
+ 				kfree(ent->data);
+ 				kfree(ent);
+ 				ent = NULL;
+-			}
++			} else
++				ent->vx_flags = IATTR_PROC_SYMLINK;
+ 		} else {
+ 			kfree(ent);
+ 			ent = NULL;
+Index: linux-2.6.20/fs/proc/inode.c
+===================================================================
+--- linux-2.6.20.orig/fs/proc/inode.c
++++ linux-2.6.20/fs/proc/inode.c
+@@ -168,6 +168,8 @@ struct inode *proc_get_inode(struct supe
+ 			inode->i_uid = de->uid;
+ 			inode->i_gid = de->gid;
+ 		}
++		if (de->vx_flags)
++			PROC_I(inode)->vx_flags = de->vx_flags;
+ 		if (de->size)
+ 			inode->i_size = de->size;
+ 		if (de->nlink)
+Index: linux-2.6.20/fs/proc/internal.h
+===================================================================
+--- linux-2.6.20.orig/fs/proc/internal.h
++++ linux-2.6.20/fs/proc/internal.h
+@@ -10,6 +10,7 @@
+  */
+ 
+ #include <linux/proc_fs.h>
++#include <linux/vs_pid.h>
+ 
+ struct vmalloc_info {
+ 	unsigned long	used;
+@@ -56,11 +57,16 @@ static inline struct pid *proc_pid(struc
+ 	return PROC_I(inode)->pid;
+ }
+ 
+-static inline struct task_struct *get_proc_task(struct inode *inode)
++static inline struct task_struct *get_proc_task_real(struct inode *inode)
+ {
+ 	return get_pid_task(proc_pid(inode), PIDTYPE_PID);
+ }
+ 
++static inline struct task_struct *get_proc_task(struct inode *inode)
++{
++	return vx_get_proc_task(inode, proc_pid(inode));
++}
++
+ static inline int proc_fd(struct inode *inode)
+ {
+ 	return PROC_I(inode)->fd;
+Index: linux-2.6.20/fs/proc/proc_misc.c
+===================================================================
+--- linux-2.6.20.orig/fs/proc/proc_misc.c
++++ linux-2.6.20/fs/proc/proc_misc.c
+@@ -54,6 +54,8 @@
+ #include <asm/div64.h>
+ #include "internal.h"
+ 
++#include <linux/vs_cvirt.h>
++
+ #define LOAD_INT(x) ((x) >> FSHIFT)
+ #define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
+ /*
+@@ -83,17 +85,32 @@ static int proc_calc_metrics(char *page,
+ static int loadavg_read_proc(char *page, char **start, off_t off,
+ 				 int count, int *eof, void *data)
+ {
++	unsigned int running, threads;
+ 	int a, b, c;
+ 	int len;
+ 
+-	a = avenrun[0] + (FIXED_1/200);
+-	b = avenrun[1] + (FIXED_1/200);
+-	c = avenrun[2] + (FIXED_1/200);
+-	len = sprintf(page,"%d.%02d %d.%02d %d.%02d %ld/%d %d\n",
++	if (vx_flags(VXF_VIRT_LOAD, 0)) {
++		struct vx_info *vxi = current->vx_info;
++
++		a = vxi->cvirt.load[0] + (FIXED_1/200);
++		b = vxi->cvirt.load[1] + (FIXED_1/200);
++		c = vxi->cvirt.load[2] + (FIXED_1/200);
++
++		running = atomic_read(&vxi->cvirt.nr_running);
++		threads = atomic_read(&vxi->cvirt.nr_threads);
++	} else {
++		a = avenrun[0] + (FIXED_1/200);
++		b = avenrun[1] + (FIXED_1/200);
++		c = avenrun[2] + (FIXED_1/200);
++
++		running = nr_running();
++		threads = nr_threads;
++	}
++	len = sprintf(page,"%d.%02d %d.%02d %d.%02d %d/%d %d\n",
+ 		LOAD_INT(a), LOAD_FRAC(a),
+ 		LOAD_INT(b), LOAD_FRAC(b),
+ 		LOAD_INT(c), LOAD_FRAC(c),
+-		nr_running(), nr_threads, current->nsproxy->pid_ns->last_pid);
++		running, threads, current->nsproxy->pid_ns->last_pid);
+ 	return proc_calc_metrics(page, start, off, count, eof, len);
+ }
+ 
+@@ -107,6 +124,9 @@ static int uptime_read_proc(char *page, 
+ 
+ 	do_posix_clock_monotonic_gettime(&uptime);
+ 	cputime_to_timespec(idletime, &idle);
++	if (vx_flags(VXF_VIRT_UPTIME, 0))
++		vx_vsi_uptime(&uptime, &idle);
++
+ 	len = sprintf(page,"%lu.%02lu %lu.%02lu\n",
+ 			(unsigned long) uptime.tv_sec,
+ 			(uptime.tv_nsec / (NSEC_PER_SEC / 100)),
+@@ -143,7 +163,7 @@ static int meminfo_read_proc(char *page,
+ 
+ 	cached = global_page_state(NR_FILE_PAGES) -
+ 			total_swapcache_pages - i.bufferram;
+-	if (cached < 0)
++	if (cached < 0 || vx_flags(VXF_VIRT_MEM, 0))
+ 		cached = 0;
+ 
+ 	get_vmalloc_info(&vmi);
+Index: linux-2.6.20/fs/proc/root.c
+===================================================================
+--- linux-2.6.20.orig/fs/proc/root.c
++++ linux-2.6.20/fs/proc/root.c
+@@ -26,6 +26,9 @@ struct proc_dir_entry *proc_net, *proc_n
+ #ifdef CONFIG_SYSCTL
+ struct proc_dir_entry *proc_sys_root;
+ #endif
++struct proc_dir_entry *proc_virtual;
++
++extern void proc_vx_init(void);
+ 
+ static int proc_get_sb(struct file_system_type *fs_type,
+ 	int flags, const char *dev_name, void *data, struct vfsmount *mnt)
+@@ -90,6 +93,7 @@ void __init proc_root_init(void)
+ 	proc_device_tree_init();
+ #endif
+ 	proc_bus = proc_mkdir("bus", NULL);
++	proc_vx_init();
+ }
+ 
+ static int proc_root_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat
+Index: linux-2.6.20/fs/quota.c
+===================================================================
+--- linux-2.6.20.orig/fs/quota.c
++++ linux-2.6.20/fs/quota.c
+@@ -17,47 +17,129 @@
+ #include <linux/buffer_head.h>
+ #include <linux/capability.h>
+ #include <linux/quotaops.h>
++#include <linux/major.h>
++#include <linux/blkdev.h>
++#include <linux/vs_context.h>
++
++
++/* Dquota Hash Management Functions */
++
++static LIST_HEAD(dqhash_list);
++
++static spinlock_t dqhash_lock = SPIN_LOCK_UNLOCKED;
++
++
++struct dqhash *new_dqhash(struct super_block *sb, unsigned int id)
++{
++	struct dqhash *hash;
++	unsigned long flags;
++	int err;
++
++	err = -ENOMEM;
++	hash = kmalloc(sizeof(struct dqhash),  GFP_USER);
++	if (!hash)
++		goto out;
++
++	memset(hash, 0, sizeof(struct dqhash));
++	hash->dqh_id = id;
++	atomic_set(&hash->dqh_count, 1);
++
++	INIT_LIST_HEAD(&hash->dqh_list);
++
++	mutex_init(&hash->dqh_dqopt.dqio_mutex);
++	mutex_init(&hash->dqh_dqopt.dqonoff_mutex);
++	init_rwsem(&hash->dqh_dqopt.dqptr_sem);
++	hash->dqh_qop = sb->s_qop;
++	hash->dqh_qcop = sb->s_qcop;
++	hash->dqh_sb = sb;
++
++	spin_lock_irqsave(&dqhash_lock, flags);
++	list_add(&hash->dqh_list, &dqhash_list);
++	spin_unlock_irqrestore(&dqhash_lock, flags);
++	vxdprintk(VXD_CBIT(misc, 0),
++		"new_dqhash: %p [#0x%08x]", hash, hash->dqh_id);
++	return hash;
++
++	// kfree(hash);
++out:
++	return ERR_PTR(err);
++}
++
++void destroy_dqhash(struct dqhash *hash)
++{
++	unsigned long flags;
++
++	vxdprintk(VXD_CBIT(misc, 0),
++		"destroy_dqhash: %p [#0x%08x] c=%d",
++		hash, hash->dqh_id, atomic_read(&hash->dqh_count));
++	spin_lock_irqsave(&dqhash_lock, flags);
++	list_del_init(&hash->dqh_list);
++	spin_unlock_irqrestore(&dqhash_lock, flags);
++	kfree(hash);
++}
++
++
++struct dqhash *find_dqhash(unsigned int id)
++{
++	struct list_head *head;
++	unsigned long flags;
++	struct dqhash *hash;
++
++	spin_lock_irqsave(&dqhash_lock, flags);
++	list_for_each(head, &dqhash_list) {
++		hash = list_entry(head, struct dqhash, dqh_list);
++		if (hash->dqh_id == id)
++			goto dqh_found;
++	}
++	hash = NULL;
++dqh_found:
++	spin_unlock_irqrestore(&dqhash_lock, flags);
++	if (hash)
++		dqhget(hash);
++	return hash;
++}
++
+ 
+ /* Check validity of generic quotactl commands */
+-static int generic_quotactl_valid(struct super_block *sb, int type, int cmd, qid_t id)
++static int generic_quotactl_valid(struct dqhash *hash, int type, int cmd, qid_t id)
+ {
+ 	if (type >= MAXQUOTAS)
+ 		return -EINVAL;
+-	if (!sb && cmd != Q_SYNC)
++	if (!hash && cmd != Q_SYNC)
+ 		return -ENODEV;
+ 	/* Is operation supported? */
+-	if (sb && !sb->s_qcop)
++	if (hash && !hash->dqh_qcop)
+ 		return -ENOSYS;
+ 
+ 	switch (cmd) {
+ 		case Q_GETFMT:
+ 			break;
+ 		case Q_QUOTAON:
+-			if (!sb->s_qcop->quota_on)
++			if (!hash->dqh_qcop->quota_on)
+ 				return -ENOSYS;
+ 			break;
+ 		case Q_QUOTAOFF:
+-			if (!sb->s_qcop->quota_off)
++			if (!hash->dqh_qcop->quota_off)
+ 				return -ENOSYS;
+ 			break;
+ 		case Q_SETINFO:
+-			if (!sb->s_qcop->set_info)
++			if (!hash->dqh_qcop->set_info)
+ 				return -ENOSYS;
+ 			break;
+ 		case Q_GETINFO:
+-			if (!sb->s_qcop->get_info)
++			if (!hash->dqh_qcop->get_info)
+ 				return -ENOSYS;
+ 			break;
+ 		case Q_SETQUOTA:
+-			if (!sb->s_qcop->set_dqblk)
++			if (!hash->dqh_qcop->set_dqblk)
+ 				return -ENOSYS;
+ 			break;
+ 		case Q_GETQUOTA:
+-			if (!sb->s_qcop->get_dqblk)
++			if (!hash->dqh_qcop->get_dqblk)
+ 				return -ENOSYS;
+ 			break;
+ 		case Q_SYNC:
+-			if (sb && !sb->s_qcop->quota_sync)
++			if (hash && !hash->dqh_qcop->quota_sync)
+ 				return -ENOSYS;
+ 			break;
+ 		default:
+@@ -73,7 +155,7 @@ static int generic_quotactl_valid(struct
+ 		case Q_SETQUOTA:
+ 		case Q_GETQUOTA:
+ 			/* This is just informative test so we are satisfied without a lock */
+-			if (!sb_has_quota_enabled(sb, type))
++			if (!dqh_has_quota_enabled(hash, type))
+ 				return -ESRCH;
+ 	}
+ 
+@@ -81,47 +163,47 @@ static int generic_quotactl_valid(struct
+ 	if (cmd == Q_GETQUOTA) {
+ 		if (((type == USRQUOTA && current->euid != id) ||
+ 		     (type == GRPQUOTA && !in_egroup_p(id))) &&
+-		    !capable(CAP_SYS_ADMIN))
++		    !vx_capable(CAP_SYS_ADMIN, VXC_QUOTA_CTL))
+ 			return -EPERM;
+ 	}
+ 	else if (cmd != Q_GETFMT && cmd != Q_SYNC && cmd != Q_GETINFO)
+-		if (!capable(CAP_SYS_ADMIN))
++		if (!vx_capable(CAP_SYS_ADMIN, VXC_QUOTA_CTL))
+ 			return -EPERM;
+ 
+ 	return 0;
+ }
+ 
+ /* Check validity of XFS Quota Manager commands */
+-static int xqm_quotactl_valid(struct super_block *sb, int type, int cmd, qid_t id)
++static int xqm_quotactl_valid(struct dqhash *hash, int type, int cmd, qid_t id)
+ {
+ 	if (type >= XQM_MAXQUOTAS)
+ 		return -EINVAL;
+-	if (!sb)
++	if (!hash)
+ 		return -ENODEV;
+-	if (!sb->s_qcop)
++	if (!hash->dqh_qcop)
+ 		return -ENOSYS;
+ 
+ 	switch (cmd) {
+ 		case Q_XQUOTAON:
+ 		case Q_XQUOTAOFF:
+ 		case Q_XQUOTARM:
+-			if (!sb->s_qcop->set_xstate)
++			if (!hash->dqh_qcop->set_xstate)
+ 				return -ENOSYS;
+ 			break;
+ 		case Q_XGETQSTAT:
+-			if (!sb->s_qcop->get_xstate)
++			if (!hash->dqh_qcop->get_xstate)
+ 				return -ENOSYS;
+ 			break;
+ 		case Q_XSETQLIM:
+-			if (!sb->s_qcop->set_xquota)
++			if (!hash->dqh_qcop->set_xquota)
+ 				return -ENOSYS;
+ 			break;
+ 		case Q_XGETQUOTA:
+-			if (!sb->s_qcop->get_xquota)
++			if (!hash->dqh_qcop->get_xquota)
+ 				return -ENOSYS;
+ 			break;
+ 		case Q_XQUOTASYNC:
+-			if (!sb->s_qcop->quota_sync)
++			if (!hash->dqh_qcop->quota_sync)
+ 				return -ENOSYS;
+ 			break;
+ 		default:
+@@ -132,57 +214,68 @@ static int xqm_quotactl_valid(struct sup
+ 	if (cmd == Q_XGETQUOTA) {
+ 		if (((type == XQM_USRQUOTA && current->euid != id) ||
+ 		     (type == XQM_GRPQUOTA && !in_egroup_p(id))) &&
+-		     !capable(CAP_SYS_ADMIN))
++		     !vx_capable(CAP_SYS_ADMIN, VXC_QUOTA_CTL))
+ 			return -EPERM;
+ 	} else if (cmd != Q_XGETQSTAT && cmd != Q_XQUOTASYNC) {
+-		if (!capable(CAP_SYS_ADMIN))
++		if (!vx_capable(CAP_SYS_ADMIN, VXC_QUOTA_CTL))
+ 			return -EPERM;
+ 	}
+ 
+ 	return 0;
+ }
+ 
+-static int check_quotactl_valid(struct super_block *sb, int type, int cmd, qid_t id)
++static int check_quotactl_valid(struct dqhash *hash, int type, int cmd, qid_t id)
+ {
+ 	int error;
+ 
+ 	if (XQM_COMMAND(cmd))
+-		error = xqm_quotactl_valid(sb, type, cmd, id);
++		error = xqm_quotactl_valid(hash, type, cmd, id);
+ 	else
+-		error = generic_quotactl_valid(sb, type, cmd, id);
++		error = generic_quotactl_valid(hash, type, cmd, id);
+ 	if (!error)
+-		error = security_quotactl(cmd, type, id, sb);
++		error = security_quotactl(cmd, type, id, hash);
+ 	return error;
+ }
+ 
+-static void quota_sync_sb(struct super_block *sb, int type)
++static void quota_sync_sb(struct super_block *sb)
+ {
+-	int cnt;
+-	struct inode *discard[MAXQUOTAS];
+-
+-	sb->s_qcop->quota_sync(sb, type);
+ 	/* This is not very clever (and fast) but currently I don't know about
+ 	 * any other simple way of getting quota data to disk and we must get
+ 	 * them there for userspace to be visible... */
+ 	if (sb->s_op->sync_fs)
+ 		sb->s_op->sync_fs(sb, 1);
+ 	sync_blockdev(sb->s_bdev);
++}
++
++static void quota_sync_dqh(struct dqhash *hash, int type)
++{
++	int cnt;
++	struct inode *discard[MAXQUOTAS];
++
++	vxdprintk(VXD_CBIT(quota, 1),
++		"quota_sync_dqh(%p,%d)", hash, type);
++	hash->dqh_qcop->quota_sync(hash, type);
++
++	quota_sync_sb(hash->dqh_sb);
+ 
+ 	/* Now when everything is written we can discard the pagecache so
+ 	 * that userspace sees the changes. We need i_mutex and so we could
+ 	 * not do it inside dqonoff_mutex. Moreover we need to be carefull
+ 	 * about races with quotaoff() (that is the reason why we have own
+ 	 * reference to inode). */
+-	mutex_lock(&sb_dqopt(sb)->dqonoff_mutex);
++	mutex_lock(&dqh_dqopt(hash)->dqonoff_mutex);
+ 	for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
+ 		discard[cnt] = NULL;
+ 		if (type != -1 && cnt != type)
+ 			continue;
+-		if (!sb_has_quota_enabled(sb, cnt))
++		if (!dqh_has_quota_enabled(hash, cnt))
+ 			continue;
+-		discard[cnt] = igrab(sb_dqopt(sb)->files[cnt]);
++		vxdprintk(VXD_CBIT(quota, 0),
++			"quota_sync_dqh(%p,%d) discard inode %p",
++			hash, type, dqh_dqopt(hash)->files[cnt]);
++		discard[cnt] = igrab(dqh_dqopt(hash)->files[cnt]);
+ 	}
+-	mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex);
++	mutex_unlock(&dqh_dqopt(hash)->dqonoff_mutex);
+ 	for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
+ 		if (discard[cnt]) {
+ 			mutex_lock(&discard[cnt]->i_mutex);
+@@ -193,67 +286,59 @@ static void quota_sync_sb(struct super_b
+ 	}
+ }
+ 
+-void sync_dquots(struct super_block *sb, int type)
++void sync_dquots_dqh(struct dqhash *hash, int type)
+ {
+-	int cnt, dirty;
++	vxdprintk(VXD_CBIT(quota, 1),
++		"sync_dquots_dqh(%p,%d)", hash, type);
+ 
+-	if (sb) {
+-		if (sb->s_qcop->quota_sync)
+-			quota_sync_sb(sb, type);
+-		return;
+-	}
++	if (hash->dqh_qcop->quota_sync)
++		quota_sync_dqh(hash, type);
++}
+ 
+-	spin_lock(&sb_lock);
+-restart:
+-	list_for_each_entry(sb, &super_blocks, s_list) {
+-		/* This test just improves performance so it needn't be reliable... */
+-		for (cnt = 0, dirty = 0; cnt < MAXQUOTAS; cnt++)
+-			if ((type == cnt || type == -1) && sb_has_quota_enabled(sb, cnt)
+-			    && info_any_dirty(&sb_dqopt(sb)->info[cnt]))
+-				dirty = 1;
+-		if (!dirty)
+-			continue;
+-		sb->s_count++;
+-		spin_unlock(&sb_lock);
+-		down_read(&sb->s_umount);
+-		if (sb->s_root && sb->s_qcop->quota_sync)
+-			quota_sync_sb(sb, type);
+-		up_read(&sb->s_umount);
+-		spin_lock(&sb_lock);
+-		if (__put_super_and_need_restart(sb))
+-			goto restart;
++void sync_dquots(struct dqhash *hash, int type)
++
++{
++	vxdprintk(VXD_CBIT(quota, 1),
++		"sync_dquots(%p,%d)", hash, type);
++
++	if (hash) {
++		if (hash->dqh_qcop->quota_sync)
++			quota_sync_dqh(hash, type);
++		return;
+ 	}
+-	spin_unlock(&sb_lock);
+ }
+ 
+ /* Copy parameters and call proper function */
+-static int do_quotactl(struct super_block *sb, int type, int cmd, qid_t id, void __user *addr)
++static int do_quotactl(struct dqhash *hash, int type, int cmd, qid_t id, void __user *addr)
+ {
+ 	int ret;
+ 
++	vxdprintk(VXD_CBIT(quota, 3),
++		"do_quotactl(%p,%d,cmd=%d,id=%d,%p)", hash, type, cmd, id, addr);
++
+ 	switch (cmd) {
+ 		case Q_QUOTAON: {
+ 			char *pathname;
+ 
+ 			if (IS_ERR(pathname = getname(addr)))
+ 				return PTR_ERR(pathname);
+-			ret = sb->s_qcop->quota_on(sb, type, id, pathname);
++			ret = hash->dqh_qcop->quota_on(hash, type, id, pathname);
+ 			putname(pathname);
+ 			return ret;
+ 		}
+ 		case Q_QUOTAOFF:
+-			return sb->s_qcop->quota_off(sb, type);
++			return hash->dqh_qcop->quota_off(hash, type);
+ 
+ 		case Q_GETFMT: {
+ 			__u32 fmt;
+ 
+-			down_read(&sb_dqopt(sb)->dqptr_sem);
+-			if (!sb_has_quota_enabled(sb, type)) {
+-				up_read(&sb_dqopt(sb)->dqptr_sem);
++			down_read(&dqh_dqopt(hash)->dqptr_sem);
++			if (!dqh_has_quota_enabled(hash, type)) {
++				up_read(&dqh_dqopt(hash)->dqptr_sem);
+ 				return -ESRCH;
+ 			}
+-			fmt = sb_dqopt(sb)->info[type].dqi_format->qf_fmt_id;
+-			up_read(&sb_dqopt(sb)->dqptr_sem);
++			fmt = dqh_dqopt(hash)->info[type].dqi_format->qf_fmt_id;
++			up_read(&dqh_dqopt(hash)->dqptr_sem);
+ 			if (copy_to_user(addr, &fmt, sizeof(fmt)))
+ 				return -EFAULT;
+ 			return 0;
+@@ -261,7 +346,7 @@ static int do_quotactl(struct super_bloc
+ 		case Q_GETINFO: {
+ 			struct if_dqinfo info;
+ 
+-			if ((ret = sb->s_qcop->get_info(sb, type, &info)))
++			if ((ret = hash->dqh_qcop->get_info(hash, type, &info)))
+ 				return ret;
+ 			if (copy_to_user(addr, &info, sizeof(info)))
+ 				return -EFAULT;
+@@ -272,12 +357,12 @@ static int do_quotactl(struct super_bloc
+ 
+ 			if (copy_from_user(&info, addr, sizeof(info)))
+ 				return -EFAULT;
+-			return sb->s_qcop->set_info(sb, type, &info);
++			return hash->dqh_qcop->set_info(hash, type, &info);
+ 		}
+ 		case Q_GETQUOTA: {
+ 			struct if_dqblk idq;
+ 
+-			if ((ret = sb->s_qcop->get_dqblk(sb, type, id, &idq)))
++			if ((ret = hash->dqh_qcop->get_dqblk(hash, type, id, &idq)))
+ 				return ret;
+ 			if (copy_to_user(addr, &idq, sizeof(idq)))
+ 				return -EFAULT;
+@@ -288,10 +373,10 @@ static int do_quotactl(struct super_bloc
+ 
+ 			if (copy_from_user(&idq, addr, sizeof(idq)))
+ 				return -EFAULT;
+-			return sb->s_qcop->set_dqblk(sb, type, id, &idq);
++			return hash->dqh_qcop->set_dqblk(hash, type, id, &idq);
+ 		}
+ 		case Q_SYNC:
+-			sync_dquots(sb, type);
++			sync_dquots_dqh(hash, type);
+ 			return 0;
+ 
+ 		case Q_XQUOTAON:
+@@ -301,12 +386,12 @@ static int do_quotactl(struct super_bloc
+ 
+ 			if (copy_from_user(&flags, addr, sizeof(flags)))
+ 				return -EFAULT;
+-			return sb->s_qcop->set_xstate(sb, flags, cmd);
++			return hash->dqh_qcop->set_xstate(hash, flags, cmd);
+ 		}
+ 		case Q_XGETQSTAT: {
+ 			struct fs_quota_stat fqs;
+ 		
+-			if ((ret = sb->s_qcop->get_xstate(sb, &fqs)))
++			if ((ret = hash->dqh_qcop->get_xstate(hash, &fqs)))
+ 				return ret;
+ 			if (copy_to_user(addr, &fqs, sizeof(fqs)))
+ 				return -EFAULT;
+@@ -317,19 +402,19 @@ static int do_quotactl(struct super_bloc
+ 
+ 			if (copy_from_user(&fdq, addr, sizeof(fdq)))
+ 				return -EFAULT;
+-		       return sb->s_qcop->set_xquota(sb, type, id, &fdq);
++		       return hash->dqh_qcop->set_xquota(hash, type, id, &fdq);
+ 		}
+ 		case Q_XGETQUOTA: {
+ 			struct fs_disk_quota fdq;
+ 
+-			if ((ret = sb->s_qcop->get_xquota(sb, type, id, &fdq)))
++			if ((ret = hash->dqh_qcop->get_xquota(hash, type, id, &fdq)))
+ 				return ret;
+ 			if (copy_to_user(addr, &fdq, sizeof(fdq)))
+ 				return -EFAULT;
+ 			return 0;
+ 		}
+ 		case Q_XQUOTASYNC:
+-			return sb->s_qcop->quota_sync(sb, type);
++			return hash->dqh_qcop->quota_sync(hash, type);
+ 		/* We never reach here unless validity check is broken */
+ 		default:
+ 			BUG();
+@@ -365,6 +450,43 @@ static inline struct super_block *quotac
+ #endif
+ }
+ 
++#if defined(CONFIG_BLK_DEV_VROOT) || defined(CONFIG_BLK_DEV_VROOT_MODULE)
++
++#include <linux/vroot.h>
++#include <linux/kallsyms.h>
++
++static vroot_grb_func *vroot_get_real_bdev = NULL;
++
++static spinlock_t vroot_grb_lock = SPIN_LOCK_UNLOCKED;
++
++int register_vroot_grb(vroot_grb_func *func) {
++	int ret = -EBUSY;
++
++	spin_lock(&vroot_grb_lock);
++	if (!vroot_get_real_bdev) {
++		vroot_get_real_bdev = func;
++		ret = 0;
++	}
++	spin_unlock(&vroot_grb_lock);
++	return ret;
++}
++EXPORT_SYMBOL(register_vroot_grb);
++
++int unregister_vroot_grb(vroot_grb_func *func) {
++	int ret = -EINVAL;
++
++	spin_lock(&vroot_grb_lock);
++	if (vroot_get_real_bdev) {
++		vroot_get_real_bdev = NULL;
++		ret = 0;
++	}
++	spin_unlock(&vroot_grb_lock);
++	return ret;
++}
++EXPORT_SYMBOL(unregister_vroot_grb);
++
++#endif
++
+ /*
+  * This is the system call interface. This communicates with
+  * the user-level programs. Currently this only supports diskquota
+@@ -375,6 +497,7 @@ asmlinkage long sys_quotactl(unsigned in
+ {
+ 	uint cmds, type;
+ 	struct super_block *sb = NULL;
++	struct dqhash *dqh = NULL;
+ 	int ret;
+ 
+ 	cmds = cmd >> SUBCMDSHIFT;
+@@ -386,9 +509,11 @@ asmlinkage long sys_quotactl(unsigned in
+ 			return PTR_ERR(sb);
+ 	}
+ 
+-	ret = check_quotactl_valid(sb, type, cmds, id);
++	if (sb)
++		dqh = sb->s_dqh;
++	ret = check_quotactl_valid(dqh, type, cmds, id);
+ 	if (ret >= 0)
+-		ret = do_quotactl(sb, type, cmds, id, addr);
++		ret = do_quotactl(dqh, type, cmds, id, addr);
+ 	if (sb)
+ 		drop_super(sb);
+ 
+Index: linux-2.6.20/fs/quota_v1.c
+===================================================================
+--- linux-2.6.20.orig/fs/quota_v1.c
++++ linux-2.6.20/fs/quota_v1.c
+@@ -42,12 +42,13 @@ static int v1_read_dqblk(struct dquot *d
+ 	int type = dquot->dq_type;
+ 	struct v1_disk_dqblk dqblk;
+ 
+-	if (!sb_dqopt(dquot->dq_sb)->files[type])
++	if (!dqh_dqopt(dquot->dq_dqh)->files[type])
+ 		return -EINVAL;
+ 
+ 	/* Set structure to 0s in case read fails/is after end of file */
+ 	memset(&dqblk, 0, sizeof(struct v1_disk_dqblk));
+-	dquot->dq_sb->s_op->quota_read(dquot->dq_sb, type, (char *)&dqblk, sizeof(struct v1_disk_dqblk), v1_dqoff(dquot->dq_id));
++	dquot->dq_dqh->dqh_sb->s_op->quota_read(dquot->dq_dqh, type,
++		(char *)&dqblk, sizeof(struct v1_disk_dqblk), v1_dqoff(dquot->dq_id));
+ 
+ 	v1_disk2mem_dqblk(&dquot->dq_dqb, &dqblk);
+ 	if (dquot->dq_dqb.dqb_bhardlimit == 0 && dquot->dq_dqb.dqb_bsoftlimit == 0 &&
+@@ -66,16 +67,16 @@ static int v1_commit_dqblk(struct dquot 
+ 
+ 	v1_mem2disk_dqblk(&dqblk, &dquot->dq_dqb);
+ 	if (dquot->dq_id == 0) {
+-		dqblk.dqb_btime = sb_dqopt(dquot->dq_sb)->info[type].dqi_bgrace;
+-		dqblk.dqb_itime = sb_dqopt(dquot->dq_sb)->info[type].dqi_igrace;
++		dqblk.dqb_btime = dqh_dqopt(dquot->dq_dqh)->info[type].dqi_bgrace;
++		dqblk.dqb_itime = dqh_dqopt(dquot->dq_dqh)->info[type].dqi_igrace;
+ 	}
+ 	ret = 0;
+-	if (sb_dqopt(dquot->dq_sb)->files[type])
+-		ret = dquot->dq_sb->s_op->quota_write(dquot->dq_sb, type, (char *)&dqblk,
+-					sizeof(struct v1_disk_dqblk), v1_dqoff(dquot->dq_id));
++	if (dqh_dqopt(dquot->dq_dqh)->files[type])
++		ret = dquot->dq_dqh->dqh_sb->s_op->quota_write(dquot->dq_dqh, type,
++			(char *)&dqblk, sizeof(struct v1_disk_dqblk), v1_dqoff(dquot->dq_id));
+ 	if (ret != sizeof(struct v1_disk_dqblk)) {
+ 		printk(KERN_WARNING "VFS: dquota write failed on dev %s\n",
+-			dquot->dq_sb->s_id);
++			dquot->dq_dqh->dqh_sb->s_id);
+ 		if (ret >= 0)
+ 			ret = -EIO;
+ 		goto out;
+@@ -100,9 +101,9 @@ struct v2_disk_dqheader {
+ 	__le32 dqh_version;      /* File version */
+ };
+ 
+-static int v1_check_quota_file(struct super_block *sb, int type)
++static int v1_check_quota_file(struct dqhash *hash, int type)
+ {
+-	struct inode *inode = sb_dqopt(sb)->files[type];
++	struct inode *inode = dqh_dqopt(hash)->files[type];
+ 	ulong blocks;
+ 	size_t off; 
+ 	struct v2_disk_dqheader dqhead;
+@@ -118,22 +119,26 @@ static int v1_check_quota_file(struct su
+ 	if ((blocks % sizeof(struct v1_disk_dqblk) * BLOCK_SIZE + off) % sizeof(struct v1_disk_dqblk))
+ 		return 0;
+ 	/* Doublecheck whether we didn't get file with new format - with old quotactl() this could happen */
+-	size = sb->s_op->quota_read(sb, type, (char *)&dqhead, sizeof(struct v2_disk_dqheader), 0);
++	size = hash->dqh_sb->s_op->quota_read(hash, type,
++		(char *)&dqhead, sizeof(struct v2_disk_dqheader), 0);
+ 	if (size != sizeof(struct v2_disk_dqheader))
+ 		return 1;	/* Probably not new format */
+ 	if (le32_to_cpu(dqhead.dqh_magic) != quota_magics[type])
+ 		return 1;	/* Definitely not new format */
+-	printk(KERN_INFO "VFS: %s: Refusing to turn on old quota format on given file. It probably contains newer quota format.\n", sb->s_id);
++	printk(KERN_INFO "VFS: %s: Refusing to turn on old quota format on given file."
++		" It probably contains newer quota format.\n", hash->dqh_sb->s_id);
+         return 0;		/* Seems like a new format file -> refuse it */
+ }
+ 
+-static int v1_read_file_info(struct super_block *sb, int type)
++static int v1_read_file_info(struct dqhash *hash, int type)
+ {
+-	struct quota_info *dqopt = sb_dqopt(sb);
++	struct quota_info *dqopt = dqh_dqopt(hash);
+ 	struct v1_disk_dqblk dqblk;
+ 	int ret;
+ 
+-	if ((ret = sb->s_op->quota_read(sb, type, (char *)&dqblk, sizeof(struct v1_disk_dqblk), v1_dqoff(0))) != sizeof(struct v1_disk_dqblk)) {
++	if ((ret = hash->dqh_sb->s_op->quota_read(hash, type,
++		(char *)&dqblk, sizeof(struct v1_disk_dqblk),
++		v1_dqoff(0))) != sizeof(struct v1_disk_dqblk)) {
+ 		if (ret >= 0)
+ 			ret = -EIO;
+ 		goto out;
+@@ -145,14 +150,14 @@ out:
+ 	return ret;
+ }
+ 
+-static int v1_write_file_info(struct super_block *sb, int type)
++static int v1_write_file_info(struct dqhash *hash, int type)
+ {
+-	struct quota_info *dqopt = sb_dqopt(sb);
++	struct quota_info *dqopt = dqh_dqopt(hash);
+ 	struct v1_disk_dqblk dqblk;
+ 	int ret;
+ 
+ 	dqopt->info[type].dqi_flags &= ~DQF_INFO_DIRTY;
+-	if ((ret = sb->s_op->quota_read(sb, type, (char *)&dqblk,
++	if ((ret = hash->dqh_sb->s_op->quota_read(hash, type, (char *)&dqblk,
+ 	    sizeof(struct v1_disk_dqblk), v1_dqoff(0))) != sizeof(struct v1_disk_dqblk)) {
+ 		if (ret >= 0)
+ 			ret = -EIO;
+@@ -160,7 +165,7 @@ static int v1_write_file_info(struct sup
+ 	}
+ 	dqblk.dqb_itime = dqopt->info[type].dqi_igrace;
+ 	dqblk.dqb_btime = dqopt->info[type].dqi_bgrace;
+-	ret = sb->s_op->quota_write(sb, type, (char *)&dqblk,
++	ret = hash->dqh_sb->s_op->quota_write(hash, type, (char *)&dqblk,
+ 	      sizeof(struct v1_disk_dqblk), v1_dqoff(0));
+ 	if (ret == sizeof(struct v1_disk_dqblk))
+ 		ret = 0;
+Index: linux-2.6.20/fs/quota_v2.c
+===================================================================
+--- linux-2.6.20.orig/fs/quota_v2.c
++++ linux-2.6.20/fs/quota_v2.c
+@@ -26,14 +26,15 @@ typedef char *dqbuf_t;
+ #define GETENTRIES(buf) ((struct v2_disk_dqblk *)(((char *)buf)+sizeof(struct v2_disk_dqdbheader)))
+ 
+ /* Check whether given file is really vfsv0 quotafile */
+-static int v2_check_quota_file(struct super_block *sb, int type)
++static int v2_check_quota_file(struct dqhash *hash, int type)
+ {
+ 	struct v2_disk_dqheader dqhead;
+ 	ssize_t size;
+ 	static const uint quota_magics[] = V2_INITQMAGICS;
+ 	static const uint quota_versions[] = V2_INITQVERSIONS;
+  
+-	size = sb->s_op->quota_read(sb, type, (char *)&dqhead, sizeof(struct v2_disk_dqheader), 0);
++	size = hash->dqh_sb->s_op->quota_read(hash, type,
++		(char *)&dqhead, sizeof(struct v2_disk_dqheader), 0);
+ 	if (size != sizeof(struct v2_disk_dqheader)) {
+ 		printk("quota_v2: failed read expected=%zd got=%zd\n",
+ 			sizeof(struct v2_disk_dqheader), size);
+@@ -46,17 +47,17 @@ static int v2_check_quota_file(struct su
+ }
+ 
+ /* Read information header from quota file */
+-static int v2_read_file_info(struct super_block *sb, int type)
++static int v2_read_file_info(struct dqhash *hash, int type)
+ {
+ 	struct v2_disk_dqinfo dinfo;
+-	struct mem_dqinfo *info = sb_dqopt(sb)->info+type;
++	struct mem_dqinfo *info = dqh_dqopt(hash)->info+type;
+ 	ssize_t size;
+ 
+-	size = sb->s_op->quota_read(sb, type, (char *)&dinfo,
+-	       sizeof(struct v2_disk_dqinfo), V2_DQINFOOFF);
++	size = hash->dqh_sb->s_op->quota_read(hash, type,
++		(char *)&dinfo, sizeof(struct v2_disk_dqinfo), V2_DQINFOOFF);
+ 	if (size != sizeof(struct v2_disk_dqinfo)) {
+ 		printk(KERN_WARNING "Can't read info structure on device %s.\n",
+-			sb->s_id);
++			hash->dqh_sb->s_id);
+ 		return -1;
+ 	}
+ 	info->dqi_bgrace = le32_to_cpu(dinfo.dqi_bgrace);
+@@ -69,10 +70,10 @@ static int v2_read_file_info(struct supe
+ }
+ 
+ /* Write information header to quota file */
+-static int v2_write_file_info(struct super_block *sb, int type)
++static int v2_write_file_info(struct dqhash *hash, int type)
+ {
+ 	struct v2_disk_dqinfo dinfo;
+-	struct mem_dqinfo *info = sb_dqopt(sb)->info+type;
++	struct mem_dqinfo *info = dqh_dqopt(hash)->info+type;
+ 	ssize_t size;
+ 
+ 	spin_lock(&dq_data_lock);
+@@ -84,11 +85,11 @@ static int v2_write_file_info(struct sup
+ 	dinfo.dqi_blocks = cpu_to_le32(info->u.v2_i.dqi_blocks);
+ 	dinfo.dqi_free_blk = cpu_to_le32(info->u.v2_i.dqi_free_blk);
+ 	dinfo.dqi_free_entry = cpu_to_le32(info->u.v2_i.dqi_free_entry);
+-	size = sb->s_op->quota_write(sb, type, (char *)&dinfo,
++	size = hash->dqh_sb->s_op->quota_write(hash, type, (char *)&dinfo,
+ 	       sizeof(struct v2_disk_dqinfo), V2_DQINFOOFF);
+ 	if (size != sizeof(struct v2_disk_dqinfo)) {
+ 		printk(KERN_WARNING "Can't write info structure on device %s.\n",
+-			sb->s_id);
++			hash->dqh_sb->s_id);
+ 		return -1;
+ 	}
+ 	return 0;
+@@ -132,24 +133,24 @@ static inline void freedqbuf(dqbuf_t buf
+ 	kfree(buf);
+ }
+ 
+-static inline ssize_t read_blk(struct super_block *sb, int type, uint blk, dqbuf_t buf)
++static inline ssize_t read_blk(struct dqhash *hash, int type, uint blk, dqbuf_t buf)
+ {
+ 	memset(buf, 0, V2_DQBLKSIZE);
+-	return sb->s_op->quota_read(sb, type, (char *)buf,
+-	       V2_DQBLKSIZE, blk << V2_DQBLKSIZE_BITS);
++	return hash->dqh_sb->s_op->quota_read(hash, type,
++		(char *)buf, V2_DQBLKSIZE, blk << V2_DQBLKSIZE_BITS);
+ }
+ 
+-static inline ssize_t write_blk(struct super_block *sb, int type, uint blk, dqbuf_t buf)
++static inline ssize_t write_blk(struct dqhash *hash, int type, uint blk, dqbuf_t buf)
+ {
+-	return sb->s_op->quota_write(sb, type, (char *)buf,
+-	       V2_DQBLKSIZE, blk << V2_DQBLKSIZE_BITS);
++	return hash->dqh_sb->s_op->quota_write(hash, type,
++		(char *)buf, V2_DQBLKSIZE, blk << V2_DQBLKSIZE_BITS);
+ }
+ 
+ /* Remove empty block from list and return it */
+-static int get_free_dqblk(struct super_block *sb, int type)
++static int get_free_dqblk(struct dqhash *hash, int type)
+ {
+ 	dqbuf_t buf = getdqbuf();
+-	struct mem_dqinfo *info = sb_dqinfo(sb, type);
++	struct mem_dqinfo *info = dqh_dqinfo(hash, type);
+ 	struct v2_disk_dqdbheader *dh = (struct v2_disk_dqdbheader *)buf;
+ 	int ret, blk;
+ 
+@@ -157,18 +158,18 @@ static int get_free_dqblk(struct super_b
+ 		return -ENOMEM;
+ 	if (info->u.v2_i.dqi_free_blk) {
+ 		blk = info->u.v2_i.dqi_free_blk;
+-		if ((ret = read_blk(sb, type, blk, buf)) < 0)
++		if ((ret = read_blk(hash, type, blk, buf)) < 0)
+ 			goto out_buf;
+ 		info->u.v2_i.dqi_free_blk = le32_to_cpu(dh->dqdh_next_free);
+ 	}
+ 	else {
+ 		memset(buf, 0, V2_DQBLKSIZE);
+ 		/* Assure block allocation... */
+-		if ((ret = write_blk(sb, type, info->u.v2_i.dqi_blocks, buf)) < 0)
++		if ((ret = write_blk(hash, type, info->u.v2_i.dqi_blocks, buf)) < 0)
+ 			goto out_buf;
+ 		blk = info->u.v2_i.dqi_blocks++;
+ 	}
+-	mark_info_dirty(sb, type);
++	mark_info_dirty(hash, type);
+ 	ret = blk;
+ out_buf:
+ 	freedqbuf(buf);
+@@ -176,9 +177,9 @@ out_buf:
+ }
+ 
+ /* Insert empty block to the list */
+-static int put_free_dqblk(struct super_block *sb, int type, dqbuf_t buf, uint blk)
++static int put_free_dqblk(struct dqhash *hash, int type, dqbuf_t buf, uint blk)
+ {
+-	struct mem_dqinfo *info = sb_dqinfo(sb, type);
++	struct mem_dqinfo *info = dqh_dqinfo(hash, type);
+ 	struct v2_disk_dqdbheader *dh = (struct v2_disk_dqdbheader *)buf;
+ 	int err;
+ 
+@@ -186,18 +187,18 @@ static int put_free_dqblk(struct super_b
+ 	dh->dqdh_prev_free = cpu_to_le32(0);
+ 	dh->dqdh_entries = cpu_to_le16(0);
+ 	info->u.v2_i.dqi_free_blk = blk;
+-	mark_info_dirty(sb, type);
++	mark_info_dirty(hash, type);
+ 	/* Some strange block. We had better leave it... */
+-	if ((err = write_blk(sb, type, blk, buf)) < 0)
++	if ((err = write_blk(hash, type, blk, buf)) < 0)
+ 		return err;
+ 	return 0;
+ }
+ 
+ /* Remove given block from the list of blocks with free entries */
+-static int remove_free_dqentry(struct super_block *sb, int type, dqbuf_t buf, uint blk)
++static int remove_free_dqentry(struct dqhash *hash, int type, dqbuf_t buf, uint blk)
+ {
+ 	dqbuf_t tmpbuf = getdqbuf();
+-	struct mem_dqinfo *info = sb_dqinfo(sb, type);
++	struct mem_dqinfo *info = dqh_dqinfo(hash, type);
+ 	struct v2_disk_dqdbheader *dh = (struct v2_disk_dqdbheader *)buf;
+ 	uint nextblk = le32_to_cpu(dh->dqdh_next_free), prevblk = le32_to_cpu(dh->dqdh_prev_free);
+ 	int err;
+@@ -205,27 +206,27 @@ static int remove_free_dqentry(struct su
+ 	if (!tmpbuf)
+ 		return -ENOMEM;
+ 	if (nextblk) {
+-		if ((err = read_blk(sb, type, nextblk, tmpbuf)) < 0)
++		if ((err = read_blk(hash, type, nextblk, tmpbuf)) < 0)
+ 			goto out_buf;
+ 		((struct v2_disk_dqdbheader *)tmpbuf)->dqdh_prev_free = dh->dqdh_prev_free;
+-		if ((err = write_blk(sb, type, nextblk, tmpbuf)) < 0)
++		if ((err = write_blk(hash, type, nextblk, tmpbuf)) < 0)
+ 			goto out_buf;
+ 	}
+ 	if (prevblk) {
+-		if ((err = read_blk(sb, type, prevblk, tmpbuf)) < 0)
++		if ((err = read_blk(hash, type, prevblk, tmpbuf)) < 0)
+ 			goto out_buf;
+ 		((struct v2_disk_dqdbheader *)tmpbuf)->dqdh_next_free = dh->dqdh_next_free;
+-		if ((err = write_blk(sb, type, prevblk, tmpbuf)) < 0)
++		if ((err = write_blk(hash, type, prevblk, tmpbuf)) < 0)
+ 			goto out_buf;
+ 	}
+ 	else {
+ 		info->u.v2_i.dqi_free_entry = nextblk;
+-		mark_info_dirty(sb, type);
++		mark_info_dirty(hash, type);
+ 	}
+ 	freedqbuf(tmpbuf);
+ 	dh->dqdh_next_free = dh->dqdh_prev_free = cpu_to_le32(0);
+ 	/* No matter whether write succeeds block is out of list */
+-	if (write_blk(sb, type, blk, buf) < 0)
++	if (write_blk(hash, type, blk, buf) < 0)
+ 		printk(KERN_ERR "VFS: Can't write block (%u) with free entries.\n", blk);
+ 	return 0;
+ out_buf:
+@@ -234,10 +235,10 @@ out_buf:
+ }
+ 
+ /* Insert given block to the beginning of list with free entries */
+-static int insert_free_dqentry(struct super_block *sb, int type, dqbuf_t buf, uint blk)
++static int insert_free_dqentry(struct dqhash *hash, int type, dqbuf_t buf, uint blk)
+ {
+ 	dqbuf_t tmpbuf = getdqbuf();
+-	struct mem_dqinfo *info = sb_dqinfo(sb, type);
++	struct mem_dqinfo *info = dqh_dqinfo(hash, type);
+ 	struct v2_disk_dqdbheader *dh = (struct v2_disk_dqdbheader *)buf;
+ 	int err;
+ 
+@@ -245,18 +246,18 @@ static int insert_free_dqentry(struct su
+ 		return -ENOMEM;
+ 	dh->dqdh_next_free = cpu_to_le32(info->u.v2_i.dqi_free_entry);
+ 	dh->dqdh_prev_free = cpu_to_le32(0);
+-	if ((err = write_blk(sb, type, blk, buf)) < 0)
++	if ((err = write_blk(hash, type, blk, buf)) < 0)
+ 		goto out_buf;
+ 	if (info->u.v2_i.dqi_free_entry) {
+-		if ((err = read_blk(sb, type, info->u.v2_i.dqi_free_entry, tmpbuf)) < 0)
++		if ((err = read_blk(hash, type, info->u.v2_i.dqi_free_entry, tmpbuf)) < 0)
+ 			goto out_buf;
+ 		((struct v2_disk_dqdbheader *)tmpbuf)->dqdh_prev_free = cpu_to_le32(blk);
+-		if ((err = write_blk(sb, type, info->u.v2_i.dqi_free_entry, tmpbuf)) < 0)
++		if ((err = write_blk(hash, type, info->u.v2_i.dqi_free_entry, tmpbuf)) < 0)
+ 			goto out_buf;
+ 	}
+ 	freedqbuf(tmpbuf);
+ 	info->u.v2_i.dqi_free_entry = blk;
+-	mark_info_dirty(sb, type);
++	mark_info_dirty(hash, type);
+ 	return 0;
+ out_buf:
+ 	freedqbuf(tmpbuf);
+@@ -266,8 +267,9 @@ out_buf:
+ /* Find space for dquot */
+ static uint find_free_dqentry(struct dquot *dquot, int *err)
+ {
+-	struct super_block *sb = dquot->dq_sb;
+-	struct mem_dqinfo *info = sb_dqopt(sb)->info+dquot->dq_type;
++	// struct super_block *sb = dquot->dq_sb;
++	struct dqhash *dqh = dquot->dq_dqh;
++	struct mem_dqinfo *info = dqh_dqopt(dqh)->info+dquot->dq_type;
+ 	uint blk, i;
+ 	struct v2_disk_dqdbheader *dh;
+ 	struct v2_disk_dqblk *ddquot;
+@@ -283,11 +285,11 @@ static uint find_free_dqentry(struct dqu
+ 	ddquot = GETENTRIES(buf);
+ 	if (info->u.v2_i.dqi_free_entry) {
+ 		blk = info->u.v2_i.dqi_free_entry;
+-		if ((*err = read_blk(sb, dquot->dq_type, blk, buf)) < 0)
++		if ((*err = read_blk(dqh, dquot->dq_type, blk, buf)) < 0)
+ 			goto out_buf;
+ 	}
+ 	else {
+-		blk = get_free_dqblk(sb, dquot->dq_type);
++		blk = get_free_dqblk(dqh, dquot->dq_type);
+ 		if ((int)blk < 0) {
+ 			*err = blk;
+ 			freedqbuf(buf);
+@@ -296,10 +298,10 @@ static uint find_free_dqentry(struct dqu
+ 		memset(buf, 0, V2_DQBLKSIZE);
+ 		/* This is enough as block is already zeroed and entry list is empty... */
+ 		info->u.v2_i.dqi_free_entry = blk;
+-		mark_info_dirty(sb, dquot->dq_type);
++		mark_info_dirty(dqh, dquot->dq_type);
+ 	}
+ 	if (le16_to_cpu(dh->dqdh_entries)+1 >= V2_DQSTRINBLK)	/* Block will be full? */
+-		if ((*err = remove_free_dqentry(sb, dquot->dq_type, buf, blk)) < 0) {
++		if ((*err = remove_free_dqentry(dqh, dquot->dq_type, buf, blk)) < 0) {
+ 			printk(KERN_ERR "VFS: find_free_dqentry(): Can't remove block (%u) from entry free list.\n", blk);
+ 			goto out_buf;
+ 		}
+@@ -314,7 +316,7 @@ static uint find_free_dqentry(struct dqu
+ 		goto out_buf;
+ 	}
+ #endif
+-	if ((*err = write_blk(sb, dquot->dq_type, blk, buf)) < 0) {
++	if ((*err = write_blk(dqh, dquot->dq_type, blk, buf)) < 0) {
+ 		printk(KERN_ERR "VFS: find_free_dqentry(): Can't write quota data block %u.\n", blk);
+ 		goto out_buf;
+ 	}
+@@ -329,7 +331,7 @@ out_buf:
+ /* Insert reference to structure into the trie */
+ static int do_insert_tree(struct dquot *dquot, uint *treeblk, int depth)
+ {
+-	struct super_block *sb = dquot->dq_sb;
++	struct dqhash *dqh = dquot->dq_dqh;
+ 	dqbuf_t buf;
+ 	int ret = 0, newson = 0, newact = 0;
+ 	__le32 *ref;
+@@ -338,7 +340,7 @@ static int do_insert_tree(struct dquot *
+ 	if (!(buf = getdqbuf()))
+ 		return -ENOMEM;
+ 	if (!*treeblk) {
+-		ret = get_free_dqblk(sb, dquot->dq_type);
++		ret = get_free_dqblk(dqh, dquot->dq_type);
+ 		if (ret < 0)
+ 			goto out_buf;
+ 		*treeblk = ret;
+@@ -346,7 +348,7 @@ static int do_insert_tree(struct dquot *
+ 		newact = 1;
+ 	}
+ 	else {
+-		if ((ret = read_blk(sb, dquot->dq_type, *treeblk, buf)) < 0) {
++		if ((ret = read_blk(dqh, dquot->dq_type, *treeblk, buf)) < 0) {
+ 			printk(KERN_ERR "VFS: Can't read tree quota block %u.\n", *treeblk);
+ 			goto out_buf;
+ 		}
+@@ -369,10 +371,10 @@ static int do_insert_tree(struct dquot *
+ 		ret = do_insert_tree(dquot, &newblk, depth+1);
+ 	if (newson && ret >= 0) {
+ 		ref[GETIDINDEX(dquot->dq_id, depth)] = cpu_to_le32(newblk);
+-		ret = write_blk(sb, dquot->dq_type, *treeblk, buf);
++		ret = write_blk(dqh, dquot->dq_type, *treeblk, buf);
+ 	}
+ 	else if (newact && ret < 0)
+-		put_free_dqblk(sb, dquot->dq_type, buf, *treeblk);
++		put_free_dqblk(dqh, dquot->dq_type, buf, *treeblk);
+ out_buf:
+ 	freedqbuf(buf);
+ 	return ret;
+@@ -409,10 +411,11 @@ static int v2_write_dquot(struct dquot *
+ 	if (!memcmp(&empty, &ddquot, sizeof(struct v2_disk_dqblk)))
+ 		ddquot.dqb_itime = cpu_to_le64(1);
+ 	spin_unlock(&dq_data_lock);
+-	ret = dquot->dq_sb->s_op->quota_write(dquot->dq_sb, type,
++	ret = dquot->dq_dqh->dqh_sb->s_op->quota_write(dquot->dq_dqh, type,
+ 	      (char *)&ddquot, sizeof(struct v2_disk_dqblk), dquot->dq_off);
+ 	if (ret != sizeof(struct v2_disk_dqblk)) {
+-		printk(KERN_WARNING "VFS: dquota write failed on dev %s\n", dquot->dq_sb->s_id);
++		printk(KERN_WARNING "VFS: dquota write failed on dev %s\n",
++			dquot->dq_dqh->dqh_sb->s_id);
+ 		if (ret >= 0)
+ 			ret = -ENOSPC;
+ 	}
+@@ -426,7 +429,8 @@ static int v2_write_dquot(struct dquot *
+ /* Free dquot entry in data block */
+ static int free_dqentry(struct dquot *dquot, uint blk)
+ {
+-	struct super_block *sb = dquot->dq_sb;
++	// struct super_block *sb = dquot->dq_sb;
++	struct dqhash *dqh = dquot->dq_dqh;
+ 	int type = dquot->dq_type;
+ 	struct v2_disk_dqdbheader *dh;
+ 	dqbuf_t buf = getdqbuf();
+@@ -440,15 +444,15 @@ static int free_dqentry(struct dquot *dq
+ 		  (uint)(dquot->dq_off >> V2_DQBLKSIZE_BITS));
+ 		goto out_buf;
+ 	}
+-	if ((ret = read_blk(sb, type, blk, buf)) < 0) {
++	if ((ret = read_blk(dqh, type, blk, buf)) < 0) {
+ 		printk(KERN_ERR "VFS: Can't read quota data block %u\n", blk);
+ 		goto out_buf;
+ 	}
+ 	dh = (struct v2_disk_dqdbheader *)buf;
+ 	dh->dqdh_entries = cpu_to_le16(le16_to_cpu(dh->dqdh_entries)-1);
+ 	if (!le16_to_cpu(dh->dqdh_entries)) {	/* Block got free? */
+-		if ((ret = remove_free_dqentry(sb, type, buf, blk)) < 0 ||
+-		    (ret = put_free_dqblk(sb, type, buf, blk)) < 0) {
++		if ((ret = remove_free_dqentry(dqh, type, buf, blk)) < 0 ||
++		    (ret = put_free_dqblk(dqh, type, buf, blk)) < 0) {
+ 			printk(KERN_ERR "VFS: Can't move quota data block (%u) "
+ 			  "to free list.\n", blk);
+ 			goto out_buf;
+@@ -459,13 +463,13 @@ static int free_dqentry(struct dquot *dq
+ 		  sizeof(struct v2_disk_dqblk));
+ 		if (le16_to_cpu(dh->dqdh_entries) == V2_DQSTRINBLK-1) {
+ 			/* Insert will write block itself */
+-			if ((ret = insert_free_dqentry(sb, type, buf, blk)) < 0) {
++			if ((ret = insert_free_dqentry(dqh, type, buf, blk)) < 0) {
+ 				printk(KERN_ERR "VFS: Can't insert quota data block (%u) to free entry list.\n", blk);
+ 				goto out_buf;
+ 			}
+ 		}
+ 		else
+-			if ((ret = write_blk(sb, type, blk, buf)) < 0) {
++			if ((ret = write_blk(dqh, type, blk, buf)) < 0) {
+ 				printk(KERN_ERR "VFS: Can't write quota data "
+ 				  "block %u\n", blk);
+ 				goto out_buf;
+@@ -480,7 +484,7 @@ out_buf:
+ /* Remove reference to dquot from tree */
+ static int remove_tree(struct dquot *dquot, uint *blk, int depth)
+ {
+-	struct super_block *sb = dquot->dq_sb;
++	struct dqhash *dqh = dquot->dq_dqh;
+ 	int type = dquot->dq_type;
+ 	dqbuf_t buf = getdqbuf();
+ 	int ret = 0;
+@@ -489,7 +493,7 @@ static int remove_tree(struct dquot *dqu
+ 	
+ 	if (!buf)
+ 		return -ENOMEM;
+-	if ((ret = read_blk(sb, type, *blk, buf)) < 0) {
++	if ((ret = read_blk(dqh, type, *blk, buf)) < 0) {
+ 		printk(KERN_ERR "VFS: Can't read quota data block %u\n", *blk);
+ 		goto out_buf;
+ 	}
+@@ -506,11 +510,11 @@ static int remove_tree(struct dquot *dqu
+ 		for (i = 0; i < V2_DQBLKSIZE && !buf[i]; i++);	/* Block got empty? */
+ 		/* Don't put the root block into the free block list */
+ 		if (i == V2_DQBLKSIZE && *blk != V2_DQTREEOFF) {
+-			put_free_dqblk(sb, type, buf, *blk);
++			put_free_dqblk(dqh, type, buf, *blk);
+ 			*blk = 0;
+ 		}
+ 		else
+-			if ((ret = write_blk(sb, type, *blk, buf)) < 0)
++			if ((ret = write_blk(dqh, type, *blk, buf)) < 0)
+ 				printk(KERN_ERR "VFS: Can't write quota tree "
+ 				  "block %u.\n", *blk);
+ 	}
+@@ -539,7 +543,7 @@ static loff_t find_block_dqentry(struct 
+ 
+ 	if (!buf)
+ 		return -ENOMEM;
+-	if ((ret = read_blk(dquot->dq_sb, dquot->dq_type, blk, buf)) < 0) {
++	if ((ret = read_blk(dquot->dq_dqh, dquot->dq_type, blk, buf)) < 0) {
+ 		printk(KERN_ERR "VFS: Can't read quota tree block %u.\n", blk);
+ 		goto out_buf;
+ 	}
+@@ -578,7 +582,7 @@ static loff_t find_tree_dqentry(struct d
+ 
+ 	if (!buf)
+ 		return -ENOMEM;
+-	if ((ret = read_blk(dquot->dq_sb, dquot->dq_type, blk, buf)) < 0) {
++	if ((ret = read_blk(dquot->dq_dqh, dquot->dq_type, blk, buf)) < 0) {
+ 		printk(KERN_ERR "VFS: Can't read quota tree block %u.\n", blk);
+ 		goto out_buf;
+ 	}
+@@ -610,7 +614,7 @@ static int v2_read_dquot(struct dquot *d
+ 
+ #ifdef __QUOTA_V2_PARANOIA
+ 	/* Invalidated quota? */
+-	if (!dquot->dq_sb || !sb_dqopt(dquot->dq_sb)->files[type]) {
++	if (!dquot->dq_dqh || !dqh_dqopt(dquot->dq_dqh)->files[type]) {
+ 		printk(KERN_ERR "VFS: Quota invalidated while reading!\n");
+ 		return -EIO;
+ 	}
+@@ -627,7 +631,7 @@ static int v2_read_dquot(struct dquot *d
+ 	}
+ 	else {
+ 		dquot->dq_off = offset;
+-		if ((ret = dquot->dq_sb->s_op->quota_read(dquot->dq_sb, type,
++		if ((ret = dquot->dq_dqh->dqh_sb->s_op->quota_read(dquot->dq_dqh, type,
+ 		    (char *)&ddquot, sizeof(struct v2_disk_dqblk), offset))
+ 		    != sizeof(struct v2_disk_dqblk)) {
+ 			if (ret >= 0)
+Index: linux-2.6.20/fs/read_write.c
+===================================================================
+--- linux-2.6.20.orig/fs/read_write.c
++++ linux-2.6.20/fs/read_write.c
+@@ -701,12 +701,77 @@ sys_writev(unsigned long fd, const struc
+ 	return ret;
+ }
+ 
++ssize_t vfs_sendfile(struct file *out_file, struct file *in_file, loff_t *ppos,
++		     size_t count, loff_t max)
++{
++	struct inode * in_inode, * out_inode;
++	loff_t pos;
++	ssize_t ret;
++
++	/* verify in_file */
++	in_inode = in_file->f_path.dentry->d_inode;
++	if (!in_inode)
++		return -EINVAL;
++	if (!in_file->f_op || !in_file->f_op->sendfile)
++		return -EINVAL;
++
++	if (!ppos)
++		ppos = &in_file->f_pos;
++	else
++		if (!(in_file->f_mode & FMODE_PREAD))
++			return -ESPIPE;
++
++	ret = rw_verify_area(READ, in_file, ppos, count);
++	if (ret < 0)
++		return ret;
++	count = ret;
++
++	/* verify out_file */
++	out_inode = out_file->f_path.dentry->d_inode;
++	if (!out_inode)
++		return -EINVAL;
++	if (!out_file->f_op || !out_file->f_op->sendpage)
++		return -EINVAL;
++
++	ret = rw_verify_area(WRITE, out_file, &out_file->f_pos, count);
++	if (ret < 0)
++		return ret;
++	count = ret;
++
++	ret = security_file_permission (out_file, MAY_WRITE);
++	if (ret)
++		return ret;
++
++	if (!max)
++		max = min(in_inode->i_sb->s_maxbytes, out_inode->i_sb->s_maxbytes);
++
++	pos = *ppos;
++	if (unlikely(pos < 0))
++		return -EINVAL;
++	if (unlikely(pos + count > max)) {
++		if (pos >= max)
++			return -EOVERFLOW;
++		count = max - pos;
++	}
++
++	ret = in_file->f_op->sendfile(in_file, ppos, count, file_send_actor, out_file);
++
++	if (ret > 0) {
++		current->rchar += ret;
++		current->wchar += ret;
++	}
++
++	if (*ppos > max)
++		return -EOVERFLOW;
++	return ret;
++}
++
++EXPORT_SYMBOL(vfs_sendfile);
++
+ static ssize_t do_sendfile(int out_fd, int in_fd, loff_t *ppos,
+ 			   size_t count, loff_t max)
+ {
+ 	struct file * in_file, * out_file;
+-	struct inode * in_inode, * out_inode;
+-	loff_t pos;
+ 	ssize_t retval;
+ 	int fput_needed_in, fput_needed_out;
+ 
+@@ -719,22 +784,6 @@ static ssize_t do_sendfile(int out_fd, i
+ 		goto out;
+ 	if (!(in_file->f_mode & FMODE_READ))
+ 		goto fput_in;
+-	retval = -EINVAL;
+-	in_inode = in_file->f_path.dentry->d_inode;
+-	if (!in_inode)
+-		goto fput_in;
+-	if (!in_file->f_op || !in_file->f_op->sendfile)
+-		goto fput_in;
+-	retval = -ESPIPE;
+-	if (!ppos)
+-		ppos = &in_file->f_pos;
+-	else
+-		if (!(in_file->f_mode & FMODE_PREAD))
+-			goto fput_in;
+-	retval = rw_verify_area(READ, in_file, ppos, count);
+-	if (retval < 0)
+-		goto fput_in;
+-	count = retval;
+ 
+ 	retval = security_file_permission (in_file, MAY_READ);
+ 	if (retval)
+@@ -749,45 +798,12 @@ static ssize_t do_sendfile(int out_fd, i
+ 		goto fput_in;
+ 	if (!(out_file->f_mode & FMODE_WRITE))
+ 		goto fput_out;
+-	retval = -EINVAL;
+-	if (!out_file->f_op || !out_file->f_op->sendpage)
+-		goto fput_out;
+-	out_inode = out_file->f_path.dentry->d_inode;
+-	retval = rw_verify_area(WRITE, out_file, &out_file->f_pos, count);
+-	if (retval < 0)
+-		goto fput_out;
+-	count = retval;
+-
+-	retval = security_file_permission (out_file, MAY_WRITE);
+-	if (retval)
+-		goto fput_out;
+-
+-	if (!max)
+-		max = min(in_inode->i_sb->s_maxbytes, out_inode->i_sb->s_maxbytes);
+-
+-	pos = *ppos;
+-	retval = -EINVAL;
+-	if (unlikely(pos < 0))
+-		goto fput_out;
+-	if (unlikely(pos + count > max)) {
+-		retval = -EOVERFLOW;
+-		if (pos >= max)
+-			goto fput_out;
+-		count = max - pos;
+-	}
+ 
+-	retval = in_file->f_op->sendfile(in_file, ppos, count, file_send_actor, out_file);
++	retval = vfs_sendfile(out_file, in_file, ppos, count, max);
+ 
+-	if (retval > 0) {
+-		current->rchar += retval;
+-		current->wchar += retval;
+-	}
+ 	current->syscr++;
+ 	current->syscw++;
+ 
+-	if (*ppos > max)
+-		retval = -EOVERFLOW;
+-
+ fput_out:
+ 	fput_light(out_file, fput_needed_out);
+ fput_in:
+Index: linux-2.6.20/fs/reiserfs/bitmap.c
+===================================================================
+--- linux-2.6.20.orig/fs/reiserfs/bitmap.c
++++ linux-2.6.20/fs/reiserfs/bitmap.c
+@@ -13,6 +13,7 @@
+ #include <linux/reiserfs_fs_sb.h>
+ #include <linux/reiserfs_fs_i.h>
+ #include <linux/quotaops.h>
++#include <linux/vs_dlimit.h>
+ 
+ #define PREALLOCATION_SIZE 9
+ 
+@@ -425,8 +426,10 @@ static void _reiserfs_free_block(struct 
+ 	set_sb_free_blocks(rs, sb_free_blocks(rs) + 1);
+ 
+ 	journal_mark_dirty(th, s, sbh);
+-	if (for_unformatted)
++	if (for_unformatted) {
++		DLIMIT_FREE_BLOCK(inode, 1);
+ 		DQUOT_FREE_BLOCK_NODIRTY(inode, 1);
++	}
+ }
+ 
+ void reiserfs_free_block(struct reiserfs_transaction_handle *th,
+@@ -1034,6 +1037,7 @@ static inline int blocknrs_and_prealloc_
+ 	b_blocknr_t finish = SB_BLOCK_COUNT(s) - 1;
+ 	int passno = 0;
+ 	int nr_allocated = 0;
++	int blocks;
+ 
+ 	determine_prealloc_size(hint);
+ 	if (!hint->formatted_node) {
+@@ -1043,19 +1047,30 @@ static inline int blocknrs_and_prealloc_
+ 			       "reiserquota: allocating %d blocks id=%u",
+ 			       amount_needed, hint->inode->i_uid);
+ #endif
+-		quota_ret =
+-		    DQUOT_ALLOC_BLOCK_NODIRTY(hint->inode, amount_needed);
+-		if (quota_ret)	/* Quota exceeded? */
++		quota_ret = DQUOT_ALLOC_BLOCK_NODIRTY(hint->inode,
++			amount_needed);
++		if (quota_ret)
+ 			return QUOTA_EXCEEDED;
++		if (DLIMIT_ALLOC_BLOCK(hint->inode, amount_needed)) {
++			DQUOT_FREE_BLOCK_NODIRTY(hint->inode,
++				amount_needed);
++			return NO_DISK_SPACE;
++		}
++
+ 		if (hint->preallocate && hint->prealloc_size) {
+ #ifdef REISERQUOTA_DEBUG
+ 			reiserfs_debug(s, REISERFS_DEBUG_CODE,
+ 				       "reiserquota: allocating (prealloc) %d blocks id=%u",
+ 				       hint->prealloc_size, hint->inode->i_uid);
+ #endif
+-			quota_ret =
+-			    DQUOT_PREALLOC_BLOCK_NODIRTY(hint->inode,
+-							 hint->prealloc_size);
++			quota_ret = DQUOT_PREALLOC_BLOCK_NODIRTY(hint->inode,
++				hint->prealloc_size);
++			if (!quota_ret &&
++				DLIMIT_ALLOC_BLOCK(hint->inode, hint->prealloc_size)) {
++				DQUOT_FREE_BLOCK_NODIRTY(hint->inode,
++					hint->prealloc_size);
++				quota_ret = 1;
++			}
+ 			if (quota_ret)
+ 				hint->preallocate = hint->prealloc_size = 0;
+ 		}
+@@ -1087,7 +1102,10 @@ static inline int blocknrs_and_prealloc_
+ 					       nr_allocated,
+ 					       hint->inode->i_uid);
+ #endif
+-				DQUOT_FREE_BLOCK_NODIRTY(hint->inode, amount_needed + hint->prealloc_size - nr_allocated);	/* Free not allocated blocks */
++				/* Free not allocated blocks */
++				blocks = amount_needed + hint->prealloc_size - nr_allocated;
++				DLIMIT_FREE_BLOCK(hint->inode, blocks);
++				DQUOT_FREE_BLOCK_NODIRTY(hint->inode, blocks);
+ 			}
+ 			while (nr_allocated--)
+ 				reiserfs_free_block(hint->th, hint->inode,
+@@ -1118,10 +1136,10 @@ static inline int blocknrs_and_prealloc_
+ 			       REISERFS_I(hint->inode)->i_prealloc_count,
+ 			       hint->inode->i_uid);
+ #endif
+-		DQUOT_FREE_BLOCK_NODIRTY(hint->inode, amount_needed +
+-					 hint->prealloc_size - nr_allocated -
+-					 REISERFS_I(hint->inode)->
+-					 i_prealloc_count);
++		blocks = amount_needed + hint->prealloc_size - nr_allocated -
++			REISERFS_I(hint->inode)->i_prealloc_count;
++		DLIMIT_FREE_BLOCK(hint->inode, blocks);
++		DQUOT_FREE_BLOCK_NODIRTY(hint->inode, blocks);
+ 	}
+ 
+ 	return CARRY_ON;
+Index: linux-2.6.20/fs/reiserfs/file.c
+===================================================================
+--- linux-2.6.20.orig/fs/reiserfs/file.c
++++ linux-2.6.20/fs/reiserfs/file.c
+@@ -1550,6 +1550,7 @@ const struct file_operations reiserfs_fi
+ 	.release = reiserfs_file_release,
+ 	.fsync = reiserfs_sync_file,
+ 	.sendfile = generic_file_sendfile,
++	.sendpage = generic_file_sendpage,
+ 	.aio_read = generic_file_aio_read,
+ 	.aio_write = generic_file_aio_write,
+ 	.splice_read = generic_file_splice_read,
+@@ -1564,4 +1565,5 @@ struct inode_operations reiserfs_file_in
+ 	.listxattr = reiserfs_listxattr,
+ 	.removexattr = reiserfs_removexattr,
+ 	.permission = reiserfs_permission,
++	.sync_flags = reiserfs_sync_flags,
+ };
+Index: linux-2.6.20/fs/reiserfs/inode.c
+===================================================================
+--- linux-2.6.20.orig/fs/reiserfs/inode.c
++++ linux-2.6.20/fs/reiserfs/inode.c
+@@ -16,6 +16,8 @@
+ #include <linux/mpage.h>
+ #include <linux/writeback.h>
+ #include <linux/quotaops.h>
++#include <linux/vs_dlimit.h>
++#include <linux/vs_tag.h>
+ 
+ static int reiserfs_commit_write(struct file *f, struct page *page,
+ 				 unsigned from, unsigned to);
+@@ -50,6 +52,7 @@ void reiserfs_delete_inode(struct inode 
+ 		 * stat data deletion */
+ 		if (!err) 
+ 			DQUOT_FREE_INODE(inode);
++		DLIMIT_FREE_INODE(inode);
+ 
+ 		if (journal_end(&th, inode->i_sb, jbegin_count))
+ 			goto out;
+@@ -1112,6 +1115,8 @@ static void init_inode(struct inode *ino
+ 	struct buffer_head *bh;
+ 	struct item_head *ih;
+ 	__u32 rdev;
++	uid_t uid;
++	gid_t gid;
+ 	//int version = ITEM_VERSION_1;
+ 
+ 	bh = PATH_PLAST_BUFFER(path);
+@@ -1135,12 +1140,13 @@ static void init_inode(struct inode *ino
+ 		    (struct stat_data_v1 *)B_I_PITEM(bh, ih);
+ 		unsigned long blocks;
+ 
++		uid = sd_v1_uid(sd);
++		gid = sd_v1_gid(sd);
++
+ 		set_inode_item_key_version(inode, KEY_FORMAT_3_5);
+ 		set_inode_sd_version(inode, STAT_DATA_V1);
+ 		inode->i_mode = sd_v1_mode(sd);
+ 		inode->i_nlink = sd_v1_nlink(sd);
+-		inode->i_uid = sd_v1_uid(sd);
+-		inode->i_gid = sd_v1_gid(sd);
+ 		inode->i_size = sd_v1_size(sd);
+ 		inode->i_atime.tv_sec = sd_v1_atime(sd);
+ 		inode->i_mtime.tv_sec = sd_v1_mtime(sd);
+@@ -1182,11 +1188,12 @@ static void init_inode(struct inode *ino
+ 		// (directories and symlinks)
+ 		struct stat_data *sd = (struct stat_data *)B_I_PITEM(bh, ih);
+ 
++		uid    = sd_v2_uid(sd);
++		gid    = sd_v2_gid(sd);
++
+ 		inode->i_mode = sd_v2_mode(sd);
+ 		inode->i_nlink = sd_v2_nlink(sd);
+-		inode->i_uid = sd_v2_uid(sd);
+ 		inode->i_size = sd_v2_size(sd);
+-		inode->i_gid = sd_v2_gid(sd);
+ 		inode->i_mtime.tv_sec = sd_v2_mtime(sd);
+ 		inode->i_atime.tv_sec = sd_v2_atime(sd);
+ 		inode->i_ctime.tv_sec = sd_v2_ctime(sd);
+@@ -1216,6 +1223,10 @@ static void init_inode(struct inode *ino
+ 		sd_attrs_to_i_attrs(sd_v2_attrs(sd), inode);
+ 	}
+ 
++	inode->i_uid = INOTAG_UID(DX_TAG(inode), uid, gid);
++	inode->i_gid = INOTAG_GID(DX_TAG(inode), uid, gid);
++	inode->i_tag = INOTAG_TAG(DX_TAG(inode), uid, gid, 0);
++
+ 	pathrelse(path);
+ 	if (S_ISREG(inode->i_mode)) {
+ 		inode->i_op = &reiserfs_file_inode_operations;
+@@ -1238,13 +1249,15 @@ static void init_inode(struct inode *ino
+ static void inode2sd(void *sd, struct inode *inode, loff_t size)
+ {
+ 	struct stat_data *sd_v2 = (struct stat_data *)sd;
++	uid_t uid = TAGINO_UID(DX_TAG(inode), inode->i_uid, inode->i_tag);
++	gid_t gid = TAGINO_GID(DX_TAG(inode), inode->i_gid, inode->i_tag);
+ 	__u16 flags;
+ 
++	set_sd_v2_uid(sd_v2, uid);
++	set_sd_v2_gid(sd_v2, gid);
+ 	set_sd_v2_mode(sd_v2, inode->i_mode);
+ 	set_sd_v2_nlink(sd_v2, inode->i_nlink);
+-	set_sd_v2_uid(sd_v2, inode->i_uid);
+ 	set_sd_v2_size(sd_v2, size);
+-	set_sd_v2_gid(sd_v2, inode->i_gid);
+ 	set_sd_v2_mtime(sd_v2, inode->i_mtime.tv_sec);
+ 	set_sd_v2_atime(sd_v2, inode->i_atime.tv_sec);
+ 	set_sd_v2_ctime(sd_v2, inode->i_ctime.tv_sec);
+@@ -1775,6 +1788,10 @@ int reiserfs_new_inode(struct reiserfs_t
+ 
+ 	BUG_ON(!th->t_trans_id);
+ 
++	if (DLIMIT_ALLOC_INODE(inode)) {
++		err = -ENOSPC;
++		goto out_bad_dlimit;
++	}
+ 	if (DQUOT_ALLOC_INODE(inode)) {
+ 		err = -EDQUOT;
+ 		goto out_end_trans;
+@@ -1960,6 +1977,9 @@ int reiserfs_new_inode(struct reiserfs_t
+ 	DQUOT_FREE_INODE(inode);
+ 
+       out_end_trans:
++	DLIMIT_FREE_INODE(inode);
++
++      out_bad_dlimit:
+ 	journal_end(th, th->t_super, th->t_blocks_allocated);
+ 	/* Drop can be outside and it needs more credits so it's better to have it outside */
+ 	DQUOT_DROP(inode);
+@@ -2699,6 +2719,14 @@ void sd_attrs_to_i_attrs(__u16 sd_attrs,
+ 			inode->i_flags |= S_IMMUTABLE;
+ 		else
+ 			inode->i_flags &= ~S_IMMUTABLE;
++		if (sd_attrs & REISERFS_IUNLINK_FL)
++			inode->i_flags |= S_IUNLINK;
++		else
++			inode->i_flags &= ~S_IUNLINK;
++		if (sd_attrs & REISERFS_BARRIER_FL)
++			inode->i_flags |= S_BARRIER;
++		else
++			inode->i_flags &= ~S_BARRIER;
+ 		if (sd_attrs & REISERFS_APPEND_FL)
+ 			inode->i_flags |= S_APPEND;
+ 		else
+@@ -2721,6 +2749,14 @@ void i_attrs_to_sd_attrs(struct inode *i
+ 			*sd_attrs |= REISERFS_IMMUTABLE_FL;
+ 		else
+ 			*sd_attrs &= ~REISERFS_IMMUTABLE_FL;
++		if (inode->i_flags & S_IUNLINK)
++			*sd_attrs |= REISERFS_IUNLINK_FL;
++		else
++			*sd_attrs &= ~REISERFS_IUNLINK_FL;
++		if (inode->i_flags & S_BARRIER)
++			*sd_attrs |= REISERFS_BARRIER_FL;
++		else
++			*sd_attrs &= ~REISERFS_BARRIER_FL;
+ 		if (inode->i_flags & S_SYNC)
+ 			*sd_attrs |= REISERFS_SYNC_FL;
+ 		else
+@@ -2900,6 +2936,22 @@ static ssize_t reiserfs_direct_IO(int rw
+ 				  reiserfs_get_blocks_direct_io, NULL);
+ }
+ 
++int reiserfs_sync_flags(struct inode *inode)
++{
++	u16 oldflags, newflags;
++
++	oldflags = REISERFS_I(inode)->i_attrs;
++	newflags = oldflags;
++	i_attrs_to_sd_attrs(inode, &newflags);
++
++	if (oldflags ^ newflags) {
++		REISERFS_I(inode)->i_attrs = newflags;
++		inode->i_ctime = CURRENT_TIME_SEC;
++		mark_inode_dirty(inode);
++	}
++	return 0;
++}
++
+ int reiserfs_setattr(struct dentry *dentry, struct iattr *attr)
+ {
+ 	struct inode *inode = dentry->d_inode;
+@@ -2949,9 +3001,11 @@ int reiserfs_setattr(struct dentry *dent
+ 	}
+ 
+ 	error = inode_change_ok(inode, attr);
++
+ 	if (!error) {
+ 		if ((ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid) ||
+-		    (ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid)) {
++		    (ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid) ||
++		    (ia_valid & ATTR_TAG && attr->ia_tag != inode->i_tag)) {
+ 			error = reiserfs_chown_xattrs(inode, attr);
+ 
+ 			if (!error) {
+@@ -2981,6 +3035,9 @@ int reiserfs_setattr(struct dentry *dent
+ 					inode->i_uid = attr->ia_uid;
+ 				if (attr->ia_valid & ATTR_GID)
+ 					inode->i_gid = attr->ia_gid;
++				if ((attr->ia_valid & ATTR_TAG) &&
++					IS_TAGGED(inode))
++					inode->i_tag = attr->ia_tag;
+ 				mark_inode_dirty(inode);
+ 				error =
+ 				    journal_end(&th, inode->i_sb, jbegin_count);
+Index: linux-2.6.20/fs/reiserfs/ioctl.c
+===================================================================
+--- linux-2.6.20.orig/fs/reiserfs/ioctl.c
++++ linux-2.6.20/fs/reiserfs/ioctl.c
+@@ -4,6 +4,7 @@
+ 
+ #include <linux/capability.h>
+ #include <linux/fs.h>
++#include <linux/mount.h>
+ #include <linux/reiserfs_fs.h>
+ #include <linux/time.h>
+ #include <asm/uaccess.h>
+@@ -24,7 +25,7 @@ static int reiserfs_unpack(struct inode 
+ int reiserfs_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
+ 		   unsigned long arg)
+ {
+-	unsigned int flags;
++	unsigned int flags, oldflags;
+ 
+ 	switch (cmd) {
+ 	case REISERFS_IOC_UNPACK:
+@@ -43,12 +44,14 @@ int reiserfs_ioctl(struct inode *inode, 
+ 
+ 		flags = REISERFS_I(inode)->i_attrs;
+ 		i_attrs_to_sd_attrs(inode, (__u16 *) & flags);
++		flags &= REISERFS_FL_USER_VISIBLE;
+ 		return put_user(flags, (int __user *)arg);
+ 	case REISERFS_IOC_SETFLAGS:{
+ 			if (!reiserfs_attrs(inode->i_sb))
+ 				return -ENOTTY;
+ 
+-			if (IS_RDONLY(inode))
++			if (IS_RDONLY(inode) ||
++				(filp && MNT_IS_RDONLY(filp->f_vfsmnt)))
+ 				return -EROFS;
+ 
+ 			if ((current->fsuid != inode->i_uid)
+@@ -58,10 +61,12 @@ int reiserfs_ioctl(struct inode *inode, 
+ 			if (get_user(flags, (int __user *)arg))
+ 				return -EFAULT;
+ 
+-			if (((flags ^ REISERFS_I(inode)->
+-			      i_attrs) & (REISERFS_IMMUTABLE_FL |
+-					  REISERFS_APPEND_FL))
+-			    && !capable(CAP_LINUX_IMMUTABLE))
++			oldflags = REISERFS_I(inode) -> i_attrs;
++			if (((oldflags & REISERFS_IMMUTABLE_FL) ||
++				((flags ^ oldflags) &
++				(REISERFS_IMMUTABLE_FL | REISERFS_IUNLINK_FL |
++				 REISERFS_APPEND_FL))) &&
++				!capable(CAP_LINUX_IMMUTABLE))
+ 				return -EPERM;
+ 
+ 			if ((flags & REISERFS_NOTAIL_FL) &&
+@@ -72,6 +77,9 @@ int reiserfs_ioctl(struct inode *inode, 
+ 				if (result)
+ 					return result;
+ 			}
++
++			flags = flags & REISERFS_FL_USER_MODIFIABLE;
++			flags |= oldflags & ~REISERFS_FL_USER_MODIFIABLE;
+ 			sd_attrs_to_i_attrs(flags, inode);
+ 			REISERFS_I(inode)->i_attrs = flags;
+ 			inode->i_ctime = CURRENT_TIME_SEC;
+@@ -83,7 +91,8 @@ int reiserfs_ioctl(struct inode *inode, 
+ 	case REISERFS_IOC_SETVERSION:
+ 		if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+ 			return -EPERM;
+-		if (IS_RDONLY(inode))
++		if (IS_RDONLY(inode) ||
++			(filp && MNT_IS_RDONLY(filp->f_vfsmnt)))
+ 			return -EROFS;
+ 		if (get_user(inode->i_generation, (int __user *)arg))
+ 			return -EFAULT;
+Index: linux-2.6.20/fs/reiserfs/namei.c
+===================================================================
+--- linux-2.6.20.orig/fs/reiserfs/namei.c
++++ linux-2.6.20/fs/reiserfs/namei.c
+@@ -18,6 +18,7 @@
+ #include <linux/reiserfs_xattr.h>
+ #include <linux/smp_lock.h>
+ #include <linux/quotaops.h>
++#include <linux/vs_tag.h>
+ 
+ #define INC_DIR_INODE_NLINK(i) if (i->i_nlink != 1) { inc_nlink(i); if (i->i_nlink >= REISERFS_LINK_MAX) i->i_nlink=1; }
+ #define DEC_DIR_INODE_NLINK(i) if (i->i_nlink != 1) drop_nlink(i);
+@@ -361,6 +362,7 @@ static struct dentry *reiserfs_lookup(st
+ 			reiserfs_write_unlock(dir->i_sb);
+ 			return ERR_PTR(-EACCES);
+ 		}
++		dx_propagate_tag(nd, inode);
+ 
+ 		/* Propogate the priv_object flag so we know we're in the priv tree */
+ 		if (is_reiserfs_priv_object(dir))
+@@ -596,6 +598,7 @@ static int new_inode_init(struct inode *
+ 	} else {
+ 		inode->i_gid = current->fsgid;
+ 	}
++	inode->i_tag = dx_current_fstag(inode->i_sb);
+ 	DQUOT_INIT(inode);
+ 	return 0;
+ }
+@@ -1542,6 +1545,7 @@ struct inode_operations reiserfs_dir_ino
+ 	.listxattr = reiserfs_listxattr,
+ 	.removexattr = reiserfs_removexattr,
+ 	.permission = reiserfs_permission,
++	.sync_flags = reiserfs_sync_flags,
+ };
+ 
+ /*
+@@ -1558,6 +1562,7 @@ struct inode_operations reiserfs_symlink
+ 	.listxattr = reiserfs_listxattr,
+ 	.removexattr = reiserfs_removexattr,
+ 	.permission = reiserfs_permission,
++	.sync_flags = reiserfs_sync_flags,
+ 
+ };
+ 
+@@ -1571,5 +1576,6 @@ struct inode_operations reiserfs_special
+ 	.listxattr = reiserfs_listxattr,
+ 	.removexattr = reiserfs_removexattr,
+ 	.permission = reiserfs_permission,
++	.sync_flags = reiserfs_sync_flags,
+ 
+ };
+Index: linux-2.6.20/fs/reiserfs/stree.c
+===================================================================
+--- linux-2.6.20.orig/fs/reiserfs/stree.c
++++ linux-2.6.20/fs/reiserfs/stree.c
+@@ -56,6 +56,7 @@
+ #include <linux/smp_lock.h>
+ #include <linux/buffer_head.h>
+ #include <linux/quotaops.h>
++#include <linux/vs_dlimit.h>
+ 
+ /* Does the buffer contain a disk block which is in the tree. */
+ inline int B_IS_IN_TREE(const struct buffer_head *p_s_bh)
+@@ -1297,6 +1298,7 @@ int reiserfs_delete_item(struct reiserfs
+ 		       "reiserquota delete_item(): freeing %u, id=%u type=%c",
+ 		       quota_cut_bytes, p_s_inode->i_uid, head2type(&s_ih));
+ #endif
++	DLIMIT_FREE_SPACE(p_s_inode, quota_cut_bytes);
+ 	DQUOT_FREE_SPACE_NODIRTY(p_s_inode, quota_cut_bytes);
+ 
+ 	/* Return deleted body length */
+@@ -1385,6 +1387,7 @@ void reiserfs_delete_solid_item(struct r
+ #endif
+ 				DQUOT_FREE_SPACE_NODIRTY(inode,
+ 							 quota_cut_bytes);
++				DLIMIT_FREE_SPACE(inode, quota_cut_bytes);
+ 			}
+ 			break;
+ 		}
+@@ -1738,6 +1741,7 @@ int reiserfs_cut_from_item(struct reiser
+ 		       "reiserquota cut_from_item(): freeing %u id=%u type=%c",
+ 		       quota_cut_bytes, p_s_inode->i_uid, '?');
+ #endif
++	DLIMIT_FREE_SPACE(p_s_inode, quota_cut_bytes);
+ 	DQUOT_FREE_SPACE_NODIRTY(p_s_inode, quota_cut_bytes);
+ 	return n_ret_value;
+ }
+@@ -1979,6 +1983,11 @@ int reiserfs_paste_into_item(struct reis
+ 		pathrelse(p_s_search_path);
+ 		return -EDQUOT;
+ 	}
++	if (DLIMIT_ALLOC_SPACE(inode, n_pasted_size)) {
++		DQUOT_FREE_SPACE_NODIRTY(inode, n_pasted_size);
++		pathrelse(p_s_search_path);
++		return -ENOSPC;
++	}
+ 	init_tb_struct(th, &s_paste_balance, th->t_super, p_s_search_path,
+ 		       n_pasted_size);
+ #ifdef DISPLACE_NEW_PACKING_LOCALITIES
+@@ -2031,6 +2040,7 @@ int reiserfs_paste_into_item(struct reis
+ 		       n_pasted_size, inode->i_uid,
+ 		       key2type(&(p_s_key->on_disk_key)));
+ #endif
++	DLIMIT_FREE_SPACE(inode, n_pasted_size);
+ 	DQUOT_FREE_SPACE_NODIRTY(inode, n_pasted_size);
+ 	return retval;
+ }
+@@ -2068,6 +2078,11 @@ int reiserfs_insert_item(struct reiserfs
+ 			pathrelse(p_s_path);
+ 			return -EDQUOT;
+ 		}
++		if (DLIMIT_ALLOC_SPACE(inode, quota_bytes)) {
++			DQUOT_FREE_SPACE_NODIRTY(inode, quota_bytes);
++			pathrelse(p_s_path);
++			return -ENOSPC;
++		}
+ 	}
+ 	init_tb_struct(th, &s_ins_balance, th->t_super, p_s_path,
+ 		       IH_SIZE + ih_item_len(p_s_ih));
+@@ -2115,7 +2130,9 @@ int reiserfs_insert_item(struct reiserfs
+ 		       "reiserquota insert_item(): freeing %u id=%u type=%c",
+ 		       quota_bytes, inode->i_uid, head2type(p_s_ih));
+ #endif
+-	if (inode)
++	if (inode) {
++		DLIMIT_FREE_SPACE(inode, quota_bytes);
+ 		DQUOT_FREE_SPACE_NODIRTY(inode, quota_bytes);
++	}
+ 	return retval;
+ }
+Index: linux-2.6.20/fs/reiserfs/super.c
+===================================================================
+--- linux-2.6.20.orig/fs/reiserfs/super.c
++++ linux-2.6.20/fs/reiserfs/super.c
+@@ -137,7 +137,7 @@ static int remove_save_link_only(struct 
+ }
+ 
+ #ifdef CONFIG_QUOTA
+-static int reiserfs_quota_on_mount(struct super_block *, int);
++static int reiserfs_quota_on_mount(struct dqhash *, int);
+ #endif
+ 
+ /* look for uncompleted unlinks and truncates and complete them */
+@@ -177,7 +177,7 @@ static int finish_unfinished(struct supe
+ 	/* Turn on quotas so that they are updated correctly */
+ 	for (i = 0; i < MAXQUOTAS; i++) {
+ 		if (REISERFS_SB(s)->s_qf_names[i]) {
+-			int ret = reiserfs_quota_on_mount(s, i);
++			int ret = reiserfs_quota_on_mount(s->s_dqh, i);
+ 			if (ret < 0)
+ 				reiserfs_warning(s,
+ 						 "reiserfs: cannot turn on journalled quota: error %d",
+@@ -291,8 +291,8 @@ static int finish_unfinished(struct supe
+ #ifdef CONFIG_QUOTA
+ 	/* Turn quotas off */
+ 	for (i = 0; i < MAXQUOTAS; i++) {
+-		if (sb_dqopt(s)->files[i])
+-			vfs_quota_off_mount(s, i);
++		if (dqh_dqopt(s->s_dqh)->files[i])
++			vfs_quota_off_mount(s->s_dqh, i);
+ 	}
+ 	if (ms_active_set)
+ 		/* Restore the flag back */
+@@ -587,9 +587,9 @@ static void reiserfs_clear_inode(struct 
+ #endif
+ 
+ #ifdef CONFIG_QUOTA
+-static ssize_t reiserfs_quota_write(struct super_block *, int, const char *,
++static ssize_t reiserfs_quota_write(struct dqhash *, int, const char *,
+ 				    size_t, loff_t);
+-static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t,
++static ssize_t reiserfs_quota_read(struct dqhash *, int, char *, size_t,
+ 				   loff_t);
+ #endif
+ 
+@@ -622,8 +622,8 @@ static int reiserfs_write_dquot(struct d
+ static int reiserfs_acquire_dquot(struct dquot *);
+ static int reiserfs_release_dquot(struct dquot *);
+ static int reiserfs_mark_dquot_dirty(struct dquot *);
+-static int reiserfs_write_info(struct super_block *, int);
+-static int reiserfs_quota_on(struct super_block *, int, int, char *);
++static int reiserfs_write_info(struct dqhash *, int);
++static int reiserfs_quota_on(struct dqhash *, int, int, char *);
+ 
+ static struct dquot_operations reiserfs_quota_operations = {
+ 	.initialize = reiserfs_dquot_initialize,
+@@ -885,6 +885,14 @@ static int reiserfs_parse_options(struct
+ 		{"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
+ 		{"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
+ #endif
++#ifndef CONFIG_TAGGING_NONE
++		{"tagxid",.setmask = 1 << REISERFS_TAGGED},
++		{"tag",.setmask = 1 << REISERFS_TAGGED},
++		{"notag",.clrmask = 1 << REISERFS_TAGGED},
++#endif
++#ifdef CONFIG_PROPAGATE
++		{"tag",.arg_required = 'T',.values = NULL},
++#endif
+ #ifdef CONFIG_REISERFS_FS_POSIX_ACL
+ 		{"acl",.setmask = 1 << REISERFS_POSIXACL},
+ 		{"noacl",.clrmask = 1 << REISERFS_POSIXACL},
+@@ -981,7 +989,7 @@ static int reiserfs_parse_options(struct
+ 		if (c == 'u' || c == 'g') {
+ 			int qtype = c == 'u' ? USRQUOTA : GRPQUOTA;
+ 
+-			if (sb_any_quota_enabled(s)) {
++			if (dqh_any_quota_enabled(s->s_dqh)) {
+ 				reiserfs_warning(s,
+ 						 "reiserfs_parse_options: cannot change journalled quota options when quota turned on.");
+ 				return 0;
+@@ -1044,7 +1052,7 @@ static int reiserfs_parse_options(struct
+ 	}
+ 	/* This checking is not precise wrt the quota type but for our purposes it is sufficient */
+ 	if (!(*mount_options & (1 << REISERFS_QUOTA))
+-	    && sb_any_quota_enabled(s)) {
++	    && dqh_any_quota_enabled(s->s_dqh)) {
+ 		reiserfs_warning(s,
+ 				 "reiserfs_parse_options: quota options must be present when quota is turned on.");
+ 		return 0;
+@@ -1146,6 +1154,12 @@ static int reiserfs_remount(struct super
+ 		return -EINVAL;
+ 	}
+ 
++	if ((mount_options & (1 << REISERFS_TAGGED)) &&
++		!(s->s_flags & MS_TAGGED)) {
++		reiserfs_warning(s, "reiserfs: tagging not permitted on remount.");
++		return -EINVAL;
++	}
++
+ 	handle_attrs(s);
+ 
+ 	/* Add options that are safe here */
+@@ -1336,7 +1350,7 @@ static int read_super_block(struct super
+ 	s->s_export_op = &reiserfs_export_ops;
+ #ifdef CONFIG_QUOTA
+ 	s->s_qcop = &reiserfs_qctl_operations;
+-	s->dq_op = &reiserfs_quota_operations;
++	s->s_qop = &reiserfs_quota_operations;
+ #endif
+ 
+ 	/* new format is limited by the 32 bit wide i_blocks field, want to
+@@ -1593,6 +1607,10 @@ static int reiserfs_fill_super(struct su
+ 		goto error;
+ 	}
+ 
++	/* map mount option tagxid */
++	if (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_TAGGED))
++		s->s_flags |= MS_TAGGED;
++
+ 	rs = SB_DISK_SUPER_BLOCK(s);
+ 	/* Let's do basic sanity check to verify that underlying device is not
+ 	   smaller than the filesystem. If the check fails then abort and scream,
+@@ -1868,16 +1886,16 @@ static int reiserfs_write_dquot(struct d
+ 	struct reiserfs_transaction_handle th;
+ 	int ret, err;
+ 
+-	reiserfs_write_lock(dquot->dq_sb);
++	reiserfs_write_lock(dquot->dq_dqh->dqh_sb);
+ 	ret =
+-	    journal_begin(&th, dquot->dq_sb,
+-			  REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
++	    journal_begin(&th, dquot->dq_dqh->dqh_sb,
++		REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_dqh->dqh_sb));
+ 	if (ret)
+ 		goto out;
+ 	ret = dquot_commit(dquot);
+ 	err =
+-	    journal_end(&th, dquot->dq_sb,
+-			REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
++	    journal_end(&th, dquot->dq_dqh->dqh_sb,
++		REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_dqh->dqh_sb));
+ 	if (!ret && err)
+ 		ret = err;
+       out:
+@@ -1890,20 +1908,20 @@ static int reiserfs_acquire_dquot(struct
+ 	struct reiserfs_transaction_handle th;
+ 	int ret, err;
+ 
+-	reiserfs_write_lock(dquot->dq_sb);
++	reiserfs_write_lock(dquot->dq_dqh->dqh_sb);
+ 	ret =
+-	    journal_begin(&th, dquot->dq_sb,
+-			  REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
++	    journal_begin(&th, dquot->dq_dqh->dqh_sb,
++		REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_dqh->dqh_sb));
+ 	if (ret)
+ 		goto out;
+ 	ret = dquot_acquire(dquot);
+ 	err =
+-	    journal_end(&th, dquot->dq_sb,
+-			REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
++	    journal_end(&th, dquot->dq_dqh->dqh_sb,
++		REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_dqh->dqh_sb));
+ 	if (!ret && err)
+ 		ret = err;
+       out:
+-	reiserfs_write_unlock(dquot->dq_sb);
++	reiserfs_write_unlock(dquot->dq_dqh->dqh_sb);
+ 	return ret;
+ }
+ 
+@@ -1912,37 +1930,38 @@ static int reiserfs_release_dquot(struct
+ 	struct reiserfs_transaction_handle th;
+ 	int ret, err;
+ 
+-	reiserfs_write_lock(dquot->dq_sb);
++	reiserfs_write_lock(dquot->dq_dqh->dqh_sb);
+ 	ret =
+-	    journal_begin(&th, dquot->dq_sb,
+-			  REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
++	    journal_begin(&th, dquot->dq_dqh->dqh_sb,
++		REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_dqh->dqh_sb));
+ 	if (ret)
+ 		goto out;
+ 	ret = dquot_release(dquot);
+ 	err =
+-	    journal_end(&th, dquot->dq_sb,
+-			REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
++	    journal_end(&th, dquot->dq_dqh->dqh_sb,
++		REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_dqh->dqh_sb));
+ 	if (!ret && err)
+ 		ret = err;
+       out:
+-	reiserfs_write_unlock(dquot->dq_sb);
++	reiserfs_write_unlock(dquot->dq_dqh->dqh_sb);
+ 	return ret;
+ }
+ 
+ static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
+ {
+ 	/* Are we journalling quotas? */
+-	if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
+-	    REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
++	if (REISERFS_SB(dquot->dq_dqh->dqh_sb)->s_qf_names[USRQUOTA] ||
++	    REISERFS_SB(dquot->dq_dqh->dqh_sb)->s_qf_names[GRPQUOTA]) {
+ 		dquot_mark_dquot_dirty(dquot);
+ 		return reiserfs_write_dquot(dquot);
+ 	} else
+ 		return dquot_mark_dquot_dirty(dquot);
+ }
+ 
+-static int reiserfs_write_info(struct super_block *sb, int type)
++static int reiserfs_write_info(struct dqhash *hash, int type)
+ {
+ 	struct reiserfs_transaction_handle th;
++	struct super_block *sb = hash->dqh_sb;
+ 	int ret, err;
+ 
+ 	/* Data block + inode block */
+@@ -1950,7 +1969,7 @@ static int reiserfs_write_info(struct su
+ 	ret = journal_begin(&th, sb, 2);
+ 	if (ret)
+ 		goto out;
+-	ret = dquot_commit_info(sb, type);
++	ret = dquot_commit_info(hash, type);
+ 	err = journal_end(&th, sb, 2);
+ 	if (!ret && err)
+ 		ret = err;
+@@ -1962,18 +1981,21 @@ static int reiserfs_write_info(struct su
+ /*
+  * Turn on quotas during mount time - we need to find the quota file and such...
+  */
+-static int reiserfs_quota_on_mount(struct super_block *sb, int type)
++static int reiserfs_quota_on_mount(struct dqhash *hash, int type)
+ {
+-	return vfs_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type],
++	struct super_block *sb = hash->dqh_sb;
++
++	return vfs_quota_on_mount(hash, REISERFS_SB(sb)->s_qf_names[type],
+ 				  REISERFS_SB(sb)->s_jquota_fmt, type);
+ }
+ 
+ /*
+  * Standard function to be called on quota_on
+  */
+-static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
++static int reiserfs_quota_on(struct dqhash *hash, int type, int format_id,
+ 			     char *path)
+ {
++	struct super_block *sb = hash->dqh_sb;
+ 	int err;
+ 	struct nameidata nd;
+ 
+@@ -1998,7 +2020,7 @@ static int reiserfs_quota_on(struct supe
+ 	if (!REISERFS_SB(sb)->s_qf_names[USRQUOTA] &&
+ 	    !REISERFS_SB(sb)->s_qf_names[GRPQUOTA]) {
+ 		path_release(&nd);
+-		return vfs_quota_on(sb, type, format_id, path);
++		return vfs_quota_on(hash, type, format_id, path);
+ 	}
+ 	/* Quotafile not of fs root? */
+ 	if (nd.dentry->d_parent->d_inode != sb->s_root->d_inode)
+@@ -2006,17 +2028,18 @@ static int reiserfs_quota_on(struct supe
+ 				 "reiserfs: Quota file not on filesystem root. "
+ 				 "Journalled quota will not work.");
+ 	path_release(&nd);
+-	return vfs_quota_on(sb, type, format_id, path);
++	return vfs_quota_on(hash, type, format_id, path);
+ }
+ 
+ /* Read data from quotafile - avoid pagecache and such because we cannot afford
+  * acquiring the locks... As quota files are never truncated and quota code
+  * itself serializes the operations (and noone else should touch the files)
+  * we don't have to be afraid of races */
+-static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data,
++static ssize_t reiserfs_quota_read(struct dqhash *hash, int type, char *data,
+ 				   size_t len, loff_t off)
+ {
+-	struct inode *inode = sb_dqopt(sb)->files[type];
++	struct inode *inode = dqh_dqopt(hash)->files[type];
++	struct super_block *sb = hash->dqh_sb;
+ 	unsigned long blk = off >> sb->s_blocksize_bits;
+ 	int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
+ 	size_t toread;
+@@ -2058,10 +2081,11 @@ static ssize_t reiserfs_quota_read(struc
+ 
+ /* Write to quotafile (we know the transaction is already started and has
+  * enough credits) */
+-static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
++static ssize_t reiserfs_quota_write(struct dqhash *hash, int type,
+ 				    const char *data, size_t len, loff_t off)
+ {
+-	struct inode *inode = sb_dqopt(sb)->files[type];
++	struct inode *inode = dqh_dqopt(hash)->files[type];
++	struct super_block *sb = hash->dqh_sb;
+ 	unsigned long blk = off >> sb->s_blocksize_bits;
+ 	int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
+ 	int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL;
+Index: linux-2.6.20/fs/reiserfs/xattr.c
+===================================================================
+--- linux-2.6.20.orig/fs/reiserfs/xattr.c
++++ linux-2.6.20/fs/reiserfs/xattr.c
+@@ -35,6 +35,7 @@
+ #include <linux/namei.h>
+ #include <linux/errno.h>
+ #include <linux/fs.h>
++#include <linux/mount.h>
+ #include <linux/file.h>
+ #include <linux/pagemap.h>
+ #include <linux/xattr.h>
+@@ -823,7 +824,7 @@ int reiserfs_delete_xattrs(struct inode 
+ 	if (dir->d_inode->i_nlink <= 2) {
+ 		root = get_xa_root(inode->i_sb);
+ 		reiserfs_write_lock_xattrs(inode->i_sb);
+-		err = vfs_rmdir(root->d_inode, dir);
++		err = vfs_rmdir(root->d_inode, dir, NULL);
+ 		reiserfs_write_unlock_xattrs(inode->i_sb);
+ 		dput(root);
+ 	} else {
+Index: linux-2.6.20/fs/stat.c
+===================================================================
+--- linux-2.6.20.orig/fs/stat.c
++++ linux-2.6.20/fs/stat.c
+@@ -27,6 +27,7 @@ void generic_fillattr(struct inode *inod
+ 	stat->nlink = inode->i_nlink;
+ 	stat->uid = inode->i_uid;
+ 	stat->gid = inode->i_gid;
++	stat->tag = inode->i_tag;
+ 	stat->rdev = inode->i_rdev;
+ 	stat->atime = inode->i_atime;
+ 	stat->mtime = inode->i_mtime;
+Index: linux-2.6.20/fs/super.c
+===================================================================
+--- linux-2.6.20.orig/fs/super.c
++++ linux-2.6.20/fs/super.c
+@@ -37,6 +37,9 @@
+ #include <linux/idr.h>
+ #include <linux/kobject.h>
+ #include <linux/mutex.h>
++#include <linux/devpts_fs.h>
++#include <linux/proc_fs.h>
++#include <linux/vs_context.h>
+ #include <asm/uaccess.h>
+ 
+ 
+@@ -84,15 +87,14 @@ static struct super_block *alloc_super(s
+ 		s->s_count = S_BIAS;
+ 		atomic_set(&s->s_active, 1);
+ 		mutex_init(&s->s_vfs_rename_mutex);
+-		mutex_init(&s->s_dquot.dqio_mutex);
+-		mutex_init(&s->s_dquot.dqonoff_mutex);
+-		init_rwsem(&s->s_dquot.dqptr_sem);
+ 		init_waitqueue_head(&s->s_wait_unfrozen);
+ 		s->s_maxbytes = MAX_NON_LFS;
+-		s->dq_op = sb_dquot_ops;
++		s->s_qop = sb_dquot_ops;
+ 		s->s_qcop = sb_quotactl_ops;
+ 		s->s_op = &default_op;
+ 		s->s_time_gran = 1000000000;
++		/* quick hack to make dqhash id unique, sufficient for now */
++		s->s_dqh = new_dqhash(s, (unsigned long)s);
+ 	}
+ out:
+ 	return s;
+@@ -107,6 +109,7 @@ out:
+ static inline void destroy_super(struct super_block *s)
+ {
+ 	security_sb_free(s);
++	dqhput(s->s_dqh);
+ 	kfree(s);
+ }
+ 
+@@ -178,7 +181,7 @@ void deactivate_super(struct super_block
+ 	if (atomic_dec_and_lock(&s->s_active, &sb_lock)) {
+ 		s->s_count -= S_BIAS-1;
+ 		spin_unlock(&sb_lock);
+-		DQUOT_OFF(s);
++		DQUOT_OFF(s->s_dqh);
+ 		down_write(&s->s_umount);
+ 		fs->kill_sb(s);
+ 		put_filesystem(fs);
+@@ -247,7 +250,7 @@ EXPORT_SYMBOL(unlock_super);
+ void __fsync_super(struct super_block *sb)
+ {
+ 	sync_inodes_sb(sb, 0);
+-	DQUOT_SYNC(sb);
++	DQUOT_SYNC(sb->s_dqh);
+ 	lock_super(sb);
+ 	if (sb->s_dirt && sb->s_op->write_super)
+ 		sb->s_op->write_super(sb);
+@@ -871,6 +874,7 @@ struct vfsmount *
+ vfs_kern_mount(struct file_system_type *type, int flags, const char *name, void *data)
+ {
+ 	struct vfsmount *mnt;
++	struct super_block *sb;
+ 	char *secdata = NULL;
+ 	int error;
+ 
+@@ -896,7 +900,14 @@ vfs_kern_mount(struct file_system_type *
+ 	if (error < 0)
+ 		goto out_free_secdata;
+ 
+- 	error = security_sb_kern_mount(mnt->mnt_sb, secdata);
++	sb = mnt->mnt_sb;
++	error = -EPERM;
++	if (!vx_capable(CAP_SYS_ADMIN, VXC_BINARY_MOUNT) && !sb->s_bdev &&
++		(sb->s_magic != PROC_SUPER_MAGIC) &&
++		(sb->s_magic != DEVPTS_SUPER_MAGIC))
++		goto out_sb;
++
++	error = security_sb_kern_mount(sb, secdata);
+  	if (error)
+  		goto out_sb;
+ 
+@@ -924,9 +935,17 @@ do_kern_mount(const char *fstype, int fl
+ {
+ 	struct file_system_type *type = get_fs_type(fstype);
+ 	struct vfsmount *mnt;
++
+ 	if (!type)
+ 		return ERR_PTR(-ENODEV);
++
++	mnt = ERR_PTR(-EPERM);
++	if ((type->fs_flags & FS_BINARY_MOUNTDATA) &&
++		!vx_capable(CAP_SYS_ADMIN, VXC_BINARY_MOUNT))
++		goto out_put;
++
+ 	mnt = vfs_kern_mount(type, flags, name, data);
++out_put:
+ 	put_filesystem(type);
+ 	return mnt;
+ }
+Index: linux-2.6.20/fs/sysfs/mount.c
+===================================================================
+--- linux-2.6.20.orig/fs/sysfs/mount.c
++++ linux-2.6.20/fs/sysfs/mount.c
+@@ -11,8 +11,6 @@
+ 
+ #include "sysfs.h"
+ 
+-/* Random magic number */
+-#define SYSFS_MAGIC 0x62656572
+ 
+ struct vfsmount *sysfs_mount;
+ struct super_block * sysfs_sb = NULL;
+@@ -38,7 +36,7 @@ static int sysfs_fill_super(struct super
+ 
+ 	sb->s_blocksize = PAGE_CACHE_SIZE;
+ 	sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
+-	sb->s_magic = SYSFS_MAGIC;
++	sb->s_magic = SYSFS_SUPER_MAGIC;
+ 	sb->s_op = &sysfs_ops;
+ 	sb->s_time_gran = 1;
+ 	sysfs_sb = sb;
+Index: linux-2.6.20/fs/udf/super.c
+===================================================================
+--- linux-2.6.20.orig/fs/udf/super.c
++++ linux-2.6.20/fs/udf/super.c
+@@ -1576,7 +1576,7 @@ static int udf_fill_super(struct super_b
+ 
+ 	/* Fill in the rest of the superblock */
+ 	sb->s_op = &udf_sb_ops;
+-	sb->dq_op = NULL;
++	sb->s_qop = NULL;
+ 	sb->s_dirt = 0;
+ 	sb->s_magic = UDF_SUPER_MAGIC;
+ 	sb->s_time_gran = 1000;
+Index: linux-2.6.20/fs/ufs/super.c
+===================================================================
+--- linux-2.6.20.orig/fs/ufs/super.c
++++ linux-2.6.20/fs/ufs/super.c
+@@ -930,7 +930,7 @@ magic_found:
+ 	 * Read ufs_super_block into internal data structures
+ 	 */
+ 	sb->s_op = &ufs_super_ops;
+-	sb->dq_op = NULL; /***/
++	sb->s_qop = NULL; /***/
+ 	sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
+ 
+ 	uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
+@@ -1248,8 +1248,8 @@ static void destroy_inodecache(void)
+ }
+ 
+ #ifdef CONFIG_QUOTA
+-static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t);
+-static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t);
++static ssize_t ufs_quota_read(struct dqhash *, int, char *,size_t, loff_t);
++static ssize_t ufs_quota_write(struct dqhash *, int, const char *, size_t, loff_t);
+ #endif
+ 
+ static struct super_operations ufs_super_ops = {
+@@ -1274,10 +1274,11 @@ static struct super_operations ufs_super
+  * acquiring the locks... As quota files are never truncated and quota code
+  * itself serializes the operations (and noone else should touch the files)
+  * we don't have to be afraid of races */
+-static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data,
++static ssize_t ufs_quota_read(struct dqhash *hash, int type, char *data,
+ 			       size_t len, loff_t off)
+ {
+-	struct inode *inode = sb_dqopt(sb)->files[type];
++	struct inode *inode = dqh_dqopt(hash)->files[type];
++	struct super_block *sb = hash->dqh_sb;
+ 	sector_t blk = off >> sb->s_blocksize_bits;
+ 	int err = 0;
+ 	int offset = off & (sb->s_blocksize - 1);
+@@ -1313,10 +1314,11 @@ static ssize_t ufs_quota_read(struct sup
+ }
+ 
+ /* Write to quotafile */
+-static ssize_t ufs_quota_write(struct super_block *sb, int type,
++static ssize_t ufs_quota_write(struct dqhash *hash, int type,
+ 				const char *data, size_t len, loff_t off)
+ {
+-	struct inode *inode = sb_dqopt(sb)->files[type];
++	struct inode *inode = dqh_dqopt(hash)->files[type];
++	struct super_block *sb = hash->dqh_sb;
+ 	sector_t blk = off >> sb->s_blocksize_bits;
+ 	int err = 0;
+ 	int offset = off & (sb->s_blocksize - 1);
+Index: linux-2.6.20/fs/utimes.c
+===================================================================
+--- linux-2.6.20.orig/fs/utimes.c
++++ linux-2.6.20/fs/utimes.c
+@@ -4,6 +4,8 @@
+ #include <linux/namei.h>
+ #include <linux/sched.h>
+ #include <linux/utime.h>
++#include <linux/mount.h>
++#include <linux/vs_cowbl.h>
+ #include <asm/uaccess.h>
+ #include <asm/unistd.h>
+ 
+@@ -33,7 +35,7 @@ asmlinkage long sys_utime(char __user * 
+ 	inode = nd.dentry->d_inode;
+ 
+ 	error = -EROFS;
+-	if (IS_RDONLY(inode))
++	if (IS_RDONLY(inode) || MNT_IS_RDONLY(nd.mnt))
+ 		goto dput_and_out;
+ 
+ 	/* Don't worry, the checks are done in inode_change_ok() */
+@@ -84,14 +86,13 @@ long do_utimes(int dfd, char __user *fil
+ 	struct iattr newattrs;
+ 
+ 	error = __user_walk_fd(dfd, filename, LOOKUP_FOLLOW, &nd);
+-
+ 	if (error)
+ 		goto out;
+-	inode = nd.dentry->d_inode;
+ 
+-	error = -EROFS;
+-	if (IS_RDONLY(inode))
++	error = cow_check_and_break(&nd);
++	if (error)
+ 		goto dput_and_out;
++	inode = nd.dentry->d_inode;
+ 
+ 	/* Don't worry, the checks are done in inode_change_ok() */
+ 	newattrs.ia_valid = ATTR_CTIME | ATTR_MTIME | ATTR_ATIME;
+Index: linux-2.6.20/fs/xattr.c
+===================================================================
+--- linux-2.6.20.orig/fs/xattr.c
++++ linux-2.6.20/fs/xattr.c
+@@ -18,6 +18,7 @@
+ #include <linux/module.h>
+ #include <linux/fsnotify.h>
+ #include <linux/audit.h>
++#include <linux/mount.h>
+ #include <asm/uaccess.h>
+ 
+ 
+@@ -195,7 +196,7 @@ EXPORT_SYMBOL_GPL(vfs_removexattr);
+  */
+ static long
+ setxattr(struct dentry *d, char __user *name, void __user *value,
+-	 size_t size, int flags)
++	 size_t size, int flags, struct vfsmount *mnt)
+ {
+ 	int error;
+ 	void *kvalue = NULL;
+@@ -222,6 +223,9 @@ setxattr(struct dentry *d, char __user *
+ 		}
+ 	}
+ 
++	if (MNT_IS_RDONLY(mnt))
++		return -EROFS;
++
+ 	error = vfs_setxattr(d, kname, kvalue, size, flags);
+ 	kfree(kvalue);
+ 	return error;
+@@ -237,7 +241,7 @@ sys_setxattr(char __user *path, char __u
+ 	error = user_path_walk(path, &nd);
+ 	if (error)
+ 		return error;
+-	error = setxattr(nd.dentry, name, value, size, flags);
++	error = setxattr(nd.dentry, name, value, size, flags, nd.mnt);
+ 	path_release(&nd);
+ 	return error;
+ }
+@@ -252,7 +256,7 @@ sys_lsetxattr(char __user *path, char __
+ 	error = user_path_walk_link(path, &nd);
+ 	if (error)
+ 		return error;
+-	error = setxattr(nd.dentry, name, value, size, flags);
++	error = setxattr(nd.dentry, name, value, size, flags, nd.mnt);
+ 	path_release(&nd);
+ 	return error;
+ }
+@@ -270,7 +274,7 @@ sys_fsetxattr(int fd, char __user *name,
+ 		return error;
+ 	dentry = f->f_path.dentry;
+ 	audit_inode(NULL, dentry->d_inode);
+-	error = setxattr(dentry, name, value, size, flags);
++	error = setxattr(dentry, name, value, size, flags, f->f_vfsmnt);
+ 	fput(f);
+ 	return error;
+ }
+@@ -432,7 +436,7 @@ sys_flistxattr(int fd, char __user *list
+  * Extended attribute REMOVE operations
+  */
+ static long
+-removexattr(struct dentry *d, char __user *name)
++removexattr(struct dentry *d, char __user *name, struct vfsmount *mnt)
+ {
+ 	int error;
+ 	char kname[XATTR_NAME_MAX + 1];
+@@ -443,6 +447,9 @@ removexattr(struct dentry *d, char __use
+ 	if (error < 0)
+ 		return error;
+ 
++	if (MNT_IS_RDONLY(mnt))
++		return -EROFS;
++
+ 	return vfs_removexattr(d, kname);
+ }
+ 
+@@ -455,7 +462,7 @@ sys_removexattr(char __user *path, char 
+ 	error = user_path_walk(path, &nd);
+ 	if (error)
+ 		return error;
+-	error = removexattr(nd.dentry, name);
++	error = removexattr(nd.dentry, name, nd.mnt);
+ 	path_release(&nd);
+ 	return error;
+ }
+@@ -469,7 +476,7 @@ sys_lremovexattr(char __user *path, char
+ 	error = user_path_walk_link(path, &nd);
+ 	if (error)
+ 		return error;
+-	error = removexattr(nd.dentry, name);
++	error = removexattr(nd.dentry, name, nd.mnt);
+ 	path_release(&nd);
+ 	return error;
+ }
+@@ -486,7 +493,7 @@ sys_fremovexattr(int fd, char __user *na
+ 		return error;
+ 	dentry = f->f_path.dentry;
+ 	audit_inode(NULL, dentry->d_inode);
+-	error = removexattr(dentry, name);
++	error = removexattr(dentry, name, f->f_vfsmnt);
+ 	fput(f);
+ 	return error;
+ }
+Index: linux-2.6.20/fs/xfs/linux-2.6/xfs_file.c
+===================================================================
+--- linux-2.6.20.orig/fs/xfs/linux-2.6/xfs_file.c
++++ linux-2.6.20/fs/xfs/linux-2.6/xfs_file.c
+@@ -453,6 +453,7 @@ const struct file_operations xfs_file_op
+ 	.aio_read	= xfs_file_aio_read,
+ 	.aio_write	= xfs_file_aio_write,
+ 	.sendfile	= xfs_file_sendfile,
++	.sendpage	= generic_file_sendpage,
+ 	.splice_read	= xfs_file_splice_read,
+ 	.splice_write	= xfs_file_splice_write,
+ 	.unlocked_ioctl	= xfs_file_ioctl,
+@@ -476,6 +477,7 @@ const struct file_operations xfs_invis_f
+ 	.aio_read	= xfs_file_aio_read_invis,
+ 	.aio_write	= xfs_file_aio_write_invis,
+ 	.sendfile	= xfs_file_sendfile_invis,
++	.sendpage	= generic_file_sendpage,
+ 	.splice_read	= xfs_file_splice_read_invis,
+ 	.splice_write	= xfs_file_splice_write_invis,
+ 	.unlocked_ioctl	= xfs_file_ioctl_invis,
+Index: linux-2.6.20/fs/xfs/linux-2.6/xfs_ioctl.c
+===================================================================
+--- linux-2.6.20.orig/fs/xfs/linux-2.6/xfs_ioctl.c
++++ linux-2.6.20/fs/xfs/linux-2.6/xfs_ioctl.c
+@@ -1100,6 +1100,8 @@ xfs_ioc_fsgeometry(
+ #define LINUX_XFLAG_APPEND	0x00000020 /* writes to file may only append */
+ #define LINUX_XFLAG_NODUMP	0x00000040 /* do not dump file */
+ #define LINUX_XFLAG_NOATIME	0x00000080 /* do not update atime */
++#define LINUX_XFLAG_BARRIER	0x04000000 /* chroot() barrier */
++#define LINUX_XFLAG_IUNLINK	0x08000000 /* immutable unlink */
+ 
+ STATIC unsigned int
+ xfs_merge_ioc_xflags(
+@@ -1140,6 +1142,10 @@ xfs_di2lxflags(
+ 
+ 	if (di_flags & XFS_DIFLAG_IMMUTABLE)
+ 		flags |= LINUX_XFLAG_IMMUTABLE;
++	if (di_flags & XFS_DIFLAG_IUNLINK)
++		flags |= LINUX_XFLAG_IUNLINK;
++	if (di_flags & XFS_DIFLAG_BARRIER)
++		flags |= LINUX_XFLAG_BARRIER;
+ 	if (di_flags & XFS_DIFLAG_APPEND)
+ 		flags |= LINUX_XFLAG_APPEND;
+ 	if (di_flags & XFS_DIFLAG_SYNC)
+Index: linux-2.6.20/fs/xfs/linux-2.6/xfs_iops.c
+===================================================================
+--- linux-2.6.20.orig/fs/xfs/linux-2.6/xfs_iops.c
++++ linux-2.6.20/fs/xfs/linux-2.6/xfs_iops.c
+@@ -53,6 +53,7 @@
+ #include <linux/xattr.h>
+ #include <linux/namei.h>
+ #include <linux/security.h>
++#include <linux/vs_tag.h>
+ 
+ /*
+  * Get a XFS inode from a given vnode.
+@@ -402,6 +403,7 @@ xfs_vn_lookup(
+ 		d_add(dentry, NULL);
+ 		return NULL;
+ 	}
++	dx_propagate_tag(nd, vn_to_inode(cvp));
+ 
+ 	return d_splice_alias(vn_to_inode(cvp), dentry);
+ }
+@@ -659,6 +661,10 @@ xfs_vn_setattr(
+ 	int		flags = 0;
+ 	int		error;
+ 
++	error = inode_change_ok(inode, attr);
++	if (error)
++		return error;
++
+ 	if (ia_valid & ATTR_UID) {
+ 		vattr.va_mask |= XFS_AT_UID;
+ 		vattr.va_uid = attr->ia_uid;
+@@ -667,6 +673,10 @@ xfs_vn_setattr(
+ 		vattr.va_mask |= XFS_AT_GID;
+ 		vattr.va_gid = attr->ia_gid;
+ 	}
++	if ((ia_valid & ATTR_TAG) && IS_TAGGED(inode)) {
++		vattr.va_mask |= XFS_AT_TAG;
++		vattr.va_tag = attr->ia_tag;
++	}
+ 	if (ia_valid & ATTR_SIZE) {
+ 		vattr.va_mask |= XFS_AT_SIZE;
+ 		vattr.va_size = attr->ia_size;
+@@ -712,6 +722,42 @@ xfs_vn_truncate(
+ }
+ 
+ STATIC int
++xfs_vn_sync_flags(struct inode *inode)
++{
++	unsigned int oldflags, newflags;
++	int		flags = 0;
++	int		error;
++	bhv_vattr_t	vattr;
++	bhv_vnode_t	*vp = vn_from_inode(inode);
++
++	memset(&vattr, 0, sizeof vattr);
++
++	vattr.va_mask = XFS_AT_XFLAGS;
++	error = bhv_vop_getattr(vp, &vattr, 0, NULL);
++
++	if (error)
++		return error;
++	oldflags = vattr.va_xflags;
++	newflags = oldflags & ~(XFS_XFLAG_IMMUTABLE |
++		XFS_XFLAG_IUNLINK | XFS_XFLAG_BARRIER);
++
++	if (IS_IMMUTABLE(inode))
++		newflags |= XFS_XFLAG_IMMUTABLE;
++	if (IS_IUNLINK(inode))
++		newflags |= XFS_XFLAG_IUNLINK;
++	if (IS_BARRIER(inode))
++		newflags |= XFS_XFLAG_BARRIER;
++
++	if (oldflags ^ newflags) {
++		vattr.va_xflags = newflags;
++		vattr.va_mask |= XFS_AT_XFLAGS;
++		error = bhv_vop_setattr(vp, &vattr, flags, NULL);
++	}
++	vn_revalidate(vp);
++	return error;
++}
++
++STATIC int
+ xfs_vn_setxattr(
+ 	struct dentry	*dentry,
+ 	const char	*name,
+@@ -824,6 +870,7 @@ struct inode_operations xfs_inode_operat
+ 	.getxattr		= xfs_vn_getxattr,
+ 	.listxattr		= xfs_vn_listxattr,
+ 	.removexattr		= xfs_vn_removexattr,
++	.sync_flags		= xfs_vn_sync_flags,
+ };
+ 
+ struct inode_operations xfs_dir_inode_operations = {
+@@ -843,6 +890,7 @@ struct inode_operations xfs_dir_inode_op
+ 	.getxattr		= xfs_vn_getxattr,
+ 	.listxattr		= xfs_vn_listxattr,
+ 	.removexattr		= xfs_vn_removexattr,
++	.sync_flags		= xfs_vn_sync_flags,
+ };
+ 
+ struct inode_operations xfs_symlink_inode_operations = {
+@@ -856,4 +904,5 @@ struct inode_operations xfs_symlink_inod
+ 	.getxattr		= xfs_vn_getxattr,
+ 	.listxattr		= xfs_vn_listxattr,
+ 	.removexattr		= xfs_vn_removexattr,
++	.sync_flags		= xfs_vn_sync_flags,
+ };
+Index: linux-2.6.20/fs/xfs/linux-2.6/xfs_linux.h
+===================================================================
+--- linux-2.6.20.orig/fs/xfs/linux-2.6/xfs_linux.h
++++ linux-2.6.20/fs/xfs/linux-2.6/xfs_linux.h
+@@ -139,6 +139,7 @@ BUFFER_FNS(PrivateStart, unwritten);
+ #define current_pid()		(current->pid)
+ #define current_fsuid(cred)	(current->fsuid)
+ #define current_fsgid(cred)	(current->fsgid)
++#define current_fstag(cred,vp)	(dx_current_fstag(vn_to_inode(vp)->i_sb))
+ #define current_test_flags(f)	(current->flags & (f))
+ #define current_set_flags_nested(sp, f)		\
+ 		(*(sp) = current->flags, current->flags |= (f))
+Index: linux-2.6.20/fs/xfs/linux-2.6/xfs_super.c
+===================================================================
+--- linux-2.6.20.orig/fs/xfs/linux-2.6/xfs_super.c
++++ linux-2.6.20/fs/xfs/linux-2.6/xfs_super.c
+@@ -159,6 +159,7 @@ xfs_revalidate_inode(
+ 	inode->i_nlink	= ip->i_d.di_nlink;
+ 	inode->i_uid	= ip->i_d.di_uid;
+ 	inode->i_gid	= ip->i_d.di_gid;
++	inode->i_tag	= ip->i_d.di_tag;
+ 
+ 	switch (inode->i_mode & S_IFMT) {
+ 	case S_IFBLK:
+@@ -186,6 +187,14 @@ xfs_revalidate_inode(
+ 		inode->i_flags |= S_IMMUTABLE;
+ 	else
+ 		inode->i_flags &= ~S_IMMUTABLE;
++	if (ip->i_d.di_flags & XFS_DIFLAG_IUNLINK)
++		inode->i_flags |= S_IUNLINK;
++	else
++		inode->i_flags &= ~S_IUNLINK;
++	if (ip->i_d.di_flags & XFS_DIFLAG_BARRIER)
++		inode->i_flags |= S_BARRIER;
++	else
++		inode->i_flags &= ~S_BARRIER;
+ 	if (ip->i_d.di_flags & XFS_DIFLAG_APPEND)
+ 		inode->i_flags |= S_APPEND;
+ 	else
+@@ -709,6 +718,12 @@ xfs_fs_remount(
+ 	int			error;
+ 
+ 	error = bhv_vfs_parseargs(vfsp, options, args, 1);
++	if ((args->flags2 & XFSMNT2_TAGGED) &&
++		!(sb->s_flags & MS_TAGGED)) {
++		printk("XFS: %s: tagging not permitted on remount.\n",
++			sb->s_id);
++		error = EINVAL;
++	}
+ 	if (!error)
+ 		error = bhv_vfs_mntupdate(vfsp, flags, args);
+ 	kmem_free(args, sizeof(*args));
+@@ -732,36 +747,40 @@ xfs_fs_show_options(
+ 
+ STATIC int
+ xfs_fs_quotasync(
+-	struct super_block	*sb,
++	struct dqhash		*hash,
+ 	int			type)
+ {
++	struct super_block	*sb = hash->dqh_sb;
+ 	return -bhv_vfs_quotactl(vfs_from_sb(sb), Q_XQUOTASYNC, 0, NULL);
+ }
+ 
+ STATIC int
+ xfs_fs_getxstate(
+-	struct super_block	*sb,
++	struct dqhash		*hash,
+ 	struct fs_quota_stat	*fqs)
+ {
++	struct super_block	*sb = hash->dqh_sb;
+ 	return -bhv_vfs_quotactl(vfs_from_sb(sb), Q_XGETQSTAT, 0, (caddr_t)fqs);
+ }
+ 
+ STATIC int
+ xfs_fs_setxstate(
+-	struct super_block	*sb,
++	struct dqhash		*hash,
+ 	unsigned int		flags,
+ 	int			op)
+ {
++	struct super_block	*sb = hash->dqh_sb;
+ 	return -bhv_vfs_quotactl(vfs_from_sb(sb), op, 0, (caddr_t)&flags);
+ }
+ 
+ STATIC int
+ xfs_fs_getxquota(
+-	struct super_block	*sb,
++	struct dqhash		*hash,
+ 	int			type,
+ 	qid_t			id,
+ 	struct fs_disk_quota	*fdq)
+ {
++	struct super_block	*sb = hash->dqh_sb;
+ 	return -bhv_vfs_quotactl(vfs_from_sb(sb),
+ 				 (type == USRQUOTA) ? Q_XGETQUOTA :
+ 				  ((type == GRPQUOTA) ? Q_XGETGQUOTA :
+@@ -770,11 +789,12 @@ xfs_fs_getxquota(
+ 
+ STATIC int
+ xfs_fs_setxquota(
+-	struct super_block	*sb,
++	struct dqhash		*hash,
+ 	int			type,
+ 	qid_t			id,
+ 	struct fs_disk_quota	*fdq)
+ {
++	struct super_block	*sb = hash->dqh_sb;
+ 	return -bhv_vfs_quotactl(vfs_from_sb(sb),
+ 				 (type == USRQUOTA) ? Q_XSETQLIM :
+ 				  ((type == GRPQUOTA) ? Q_XSETGQLIM :
+@@ -804,6 +824,9 @@ xfs_fs_fill_super(
+ 	sb_min_blocksize(sb, BBSIZE);
+ 	sb->s_export_op = &xfs_export_operations;
+ 	sb->s_qcop = &xfs_quotactl_operations;
++#ifdef CONFIG_QUOTACTL
++	sb->s_dqh->dqh_qcop = &xfs_quotactl_operations;
++#endif
+ 	sb->s_op = &xfs_super_operations;
+ 
+ 	error = bhv_vfs_mount(vfsp, args, NULL);
+Index: linux-2.6.20/fs/xfs/linux-2.6/xfs_sysctl.c
+===================================================================
+--- linux-2.6.20.orig/fs/xfs/linux-2.6/xfs_sysctl.c
++++ linux-2.6.20/fs/xfs/linux-2.6/xfs_sysctl.c
+@@ -57,79 +57,79 @@ xfs_stats_clear_proc_handler(
+ STATIC ctl_table xfs_table[] = {
+ 	{XFS_RESTRICT_CHOWN, "restrict_chown", &xfs_params.restrict_chown.val,
+ 	sizeof(int), 0644, NULL, &proc_dointvec_minmax,
+-	&sysctl_intvec, NULL,
++	NULL, &sysctl_intvec, NULL,
+ 	&xfs_params.restrict_chown.min, &xfs_params.restrict_chown.max},
+ 
+ 	{XFS_SGID_INHERIT, "irix_sgid_inherit", &xfs_params.sgid_inherit.val,
+ 	sizeof(int), 0644, NULL, &proc_dointvec_minmax,
+-	&sysctl_intvec, NULL,
++	NULL, &sysctl_intvec, NULL,
+ 	&xfs_params.sgid_inherit.min, &xfs_params.sgid_inherit.max},
+ 
+ 	{XFS_SYMLINK_MODE, "irix_symlink_mode", &xfs_params.symlink_mode.val,
+ 	sizeof(int), 0644, NULL, &proc_dointvec_minmax,
+-	&sysctl_intvec, NULL,
++	NULL, &sysctl_intvec, NULL,
+ 	&xfs_params.symlink_mode.min, &xfs_params.symlink_mode.max},
+ 
+ 	{XFS_PANIC_MASK, "panic_mask", &xfs_params.panic_mask.val,
+ 	sizeof(int), 0644, NULL, &proc_dointvec_minmax,
+-	&sysctl_intvec, NULL,
++	NULL, &sysctl_intvec, NULL,
+ 	&xfs_params.panic_mask.min, &xfs_params.panic_mask.max},
+ 
+ 	{XFS_ERRLEVEL, "error_level", &xfs_params.error_level.val,
+ 	sizeof(int), 0644, NULL, &proc_dointvec_minmax,
+-	&sysctl_intvec, NULL,
++	NULL, &sysctl_intvec, NULL,
+ 	&xfs_params.error_level.min, &xfs_params.error_level.max},
+ 
+ 	{XFS_SYNCD_TIMER, "xfssyncd_centisecs", &xfs_params.syncd_timer.val,
+ 	sizeof(int), 0644, NULL, &proc_dointvec_minmax,
+-	&sysctl_intvec, NULL,
++	NULL, &sysctl_intvec, NULL,
+ 	&xfs_params.syncd_timer.min, &xfs_params.syncd_timer.max},
+ 
+ 	{XFS_INHERIT_SYNC, "inherit_sync", &xfs_params.inherit_sync.val,
+ 	sizeof(int), 0644, NULL, &proc_dointvec_minmax,
+-	&sysctl_intvec, NULL,
++	NULL, &sysctl_intvec, NULL,
+ 	&xfs_params.inherit_sync.min, &xfs_params.inherit_sync.max},
+ 
+ 	{XFS_INHERIT_NODUMP, "inherit_nodump", &xfs_params.inherit_nodump.val,
+ 	sizeof(int), 0644, NULL, &proc_dointvec_minmax,
+-	&sysctl_intvec, NULL,
++	NULL, &sysctl_intvec, NULL,
+ 	&xfs_params.inherit_nodump.min, &xfs_params.inherit_nodump.max},
+ 
+ 	{XFS_INHERIT_NOATIME, "inherit_noatime", &xfs_params.inherit_noatim.val,
+ 	sizeof(int), 0644, NULL, &proc_dointvec_minmax,
+-	&sysctl_intvec, NULL,
++	NULL, &sysctl_intvec, NULL,
+ 	&xfs_params.inherit_noatim.min, &xfs_params.inherit_noatim.max},
+ 
+ 	{XFS_BUF_TIMER, "xfsbufd_centisecs", &xfs_params.xfs_buf_timer.val,
+ 	sizeof(int), 0644, NULL, &proc_dointvec_minmax,
+-	&sysctl_intvec, NULL,
++	NULL, &sysctl_intvec, NULL,
+ 	&xfs_params.xfs_buf_timer.min, &xfs_params.xfs_buf_timer.max},
+ 
+ 	{XFS_BUF_AGE, "age_buffer_centisecs", &xfs_params.xfs_buf_age.val,
+ 	sizeof(int), 0644, NULL, &proc_dointvec_minmax,
+-	&sysctl_intvec, NULL,
++	NULL, &sysctl_intvec, NULL,
+ 	&xfs_params.xfs_buf_age.min, &xfs_params.xfs_buf_age.max},
+ 
+ 	{XFS_INHERIT_NOSYM, "inherit_nosymlinks", &xfs_params.inherit_nosym.val,
+ 	sizeof(int), 0644, NULL, &proc_dointvec_minmax,
+-	&sysctl_intvec, NULL,
++	NULL, &sysctl_intvec, NULL,
+ 	&xfs_params.inherit_nosym.min, &xfs_params.inherit_nosym.max},
+ 
+ 	{XFS_ROTORSTEP, "rotorstep", &xfs_params.rotorstep.val,
+ 	sizeof(int), 0644, NULL, &proc_dointvec_minmax,
+-	&sysctl_intvec, NULL,
++	NULL, &sysctl_intvec, NULL,
+ 	&xfs_params.rotorstep.min, &xfs_params.rotorstep.max},
+ 
+ 	{XFS_INHERIT_NODFRG, "inherit_nodefrag", &xfs_params.inherit_nodfrg.val,
+ 	sizeof(int), 0644, NULL, &proc_dointvec_minmax,
+-	&sysctl_intvec, NULL,
++	NULL, &sysctl_intvec, NULL,
+ 	&xfs_params.inherit_nodfrg.min, &xfs_params.inherit_nodfrg.max},
+ 
+ 	/* please keep this the last entry */
+ #ifdef CONFIG_PROC_FS
+ 	{XFS_STATS_CLEAR, "stats_clear", &xfs_params.stats_clear.val,
+ 	sizeof(int), 0644, NULL, &xfs_stats_clear_proc_handler,
+-	&sysctl_intvec, NULL,
++	NULL, &sysctl_intvec, NULL,
+ 	&xfs_params.stats_clear.min, &xfs_params.stats_clear.max},
+ #endif /* CONFIG_PROC_FS */
+ 
+Index: linux-2.6.20/fs/xfs/linux-2.6/xfs_vnode.c
+===================================================================
+--- linux-2.6.20.orig/fs/xfs/linux-2.6/xfs_vnode.c
++++ linux-2.6.20/fs/xfs/linux-2.6/xfs_vnode.c
+@@ -119,6 +119,7 @@ vn_revalidate_core(
+ 	inode->i_nlink	    = vap->va_nlink;
+ 	inode->i_uid	    = vap->va_uid;
+ 	inode->i_gid	    = vap->va_gid;
++	inode->i_tag	    = vap->va_tag;
+ 	inode->i_blocks	    = vap->va_nblocks;
+ 	inode->i_mtime	    = vap->va_mtime;
+ 	inode->i_ctime	    = vap->va_ctime;
+@@ -126,6 +127,14 @@ vn_revalidate_core(
+ 		inode->i_flags |= S_IMMUTABLE;
+ 	else
+ 		inode->i_flags &= ~S_IMMUTABLE;
++	if (vap->va_xflags & XFS_XFLAG_IUNLINK)
++		inode->i_flags |= S_IUNLINK;
++	else
++		inode->i_flags &= ~S_IUNLINK;
++	if (vap->va_xflags & XFS_XFLAG_BARRIER)
++		inode->i_flags |= S_BARRIER;
++	else
++		inode->i_flags &= ~S_BARRIER;
+ 	if (vap->va_xflags & XFS_XFLAG_APPEND)
+ 		inode->i_flags |= S_APPEND;
+ 	else
+Index: linux-2.6.20/fs/xfs/linux-2.6/xfs_vnode.h
+===================================================================
+--- linux-2.6.20.orig/fs/xfs/linux-2.6/xfs_vnode.h
++++ linux-2.6.20/fs/xfs/linux-2.6/xfs_vnode.h
+@@ -350,6 +350,7 @@ typedef struct bhv_vattr {
+ 	xfs_nlink_t	va_nlink;	/* number of references to file */
+ 	uid_t		va_uid;		/* owner user id */
+ 	gid_t		va_gid;		/* owner group id */
++	tag_t		va_tag;		/* owner group id */
+ 	xfs_ino_t	va_nodeid;	/* file id */
+ 	xfs_off_t	va_size;	/* file size in bytes */
+ 	u_long		va_blocksize;	/* blocksize preferred for i/o */
+@@ -398,13 +399,15 @@ typedef struct bhv_vattr {
+ #define XFS_AT_PROJID		0x04000000
+ #define XFS_AT_SIZE_NOPERM	0x08000000
+ #define XFS_AT_GENCOUNT		0x10000000
++#define XFS_AT_TAG		0x20000000
+ 
+ #define XFS_AT_ALL	(XFS_AT_TYPE|XFS_AT_MODE|XFS_AT_UID|XFS_AT_GID|\
+ 		XFS_AT_FSID|XFS_AT_NODEID|XFS_AT_NLINK|XFS_AT_SIZE|\
+ 		XFS_AT_ATIME|XFS_AT_MTIME|XFS_AT_CTIME|XFS_AT_RDEV|\
+ 		XFS_AT_BLKSIZE|XFS_AT_NBLOCKS|XFS_AT_VCODE|XFS_AT_MAC|\
+ 		XFS_AT_ACL|XFS_AT_CAP|XFS_AT_INF|XFS_AT_XFLAGS|XFS_AT_EXTSIZE|\
+-		XFS_AT_NEXTENTS|XFS_AT_ANEXTENTS|XFS_AT_PROJID|XFS_AT_GENCOUNT)
++		XFS_AT_NEXTENTS|XFS_AT_ANEXTENTS|XFS_AT_PROJID|XFS_AT_GENCOUNT\
++		XFS_AT_TAG)
+ 
+ #define XFS_AT_STAT	(XFS_AT_TYPE|XFS_AT_MODE|XFS_AT_UID|XFS_AT_GID|\
+ 		XFS_AT_FSID|XFS_AT_NODEID|XFS_AT_NLINK|XFS_AT_SIZE|\
+Index: linux-2.6.20/fs/xfs/quota/xfs_qm_syscalls.c
+===================================================================
+--- linux-2.6.20.orig/fs/xfs/quota/xfs_qm_syscalls.c
++++ linux-2.6.20/fs/xfs/quota/xfs_qm_syscalls.c
+@@ -17,6 +17,7 @@
+  */
+ 
+ #include <linux/capability.h>
++#include <linux/vs_context.h>
+ 
+ #include "xfs.h"
+ #include "xfs_fs.h"
+@@ -213,7 +214,7 @@ xfs_qm_scall_quotaoff(
+ 	xfs_qoff_logitem_t	*qoffstart;
+ 	int			nculprits;
+ 
+-	if (!force && !capable(CAP_SYS_ADMIN))
++	if (!force && !vx_capable(CAP_SYS_ADMIN, VXC_QUOTA_CTL))
+ 		return XFS_ERROR(EPERM);
+ 	/*
+ 	 * No file system can have quotas enabled on disk but not in core.
+@@ -382,7 +383,7 @@ xfs_qm_scall_trunc_qfiles(
+ 	int		error;
+ 	xfs_inode_t	*qip;
+ 
+-	if (!capable(CAP_SYS_ADMIN))
++	if (!vx_capable(CAP_SYS_ADMIN, VXC_QUOTA_CTL))
+ 		return XFS_ERROR(EPERM);
+ 	error = 0;
+ 	if (!XFS_SB_VERSION_HASQUOTA(&mp->m_sb) || flags == 0) {
+@@ -427,7 +428,7 @@ xfs_qm_scall_quotaon(
+ 	uint		accflags;
+ 	__int64_t	sbflags;
+ 
+-	if (!capable(CAP_SYS_ADMIN))
++	if (!vx_capable(CAP_SYS_ADMIN, VXC_QUOTA_CTL))
+ 		return XFS_ERROR(EPERM);
+ 
+ 	flags &= (XFS_ALL_QUOTA_ACCT | XFS_ALL_QUOTA_ENFD);
+@@ -598,7 +599,7 @@ xfs_qm_scall_setqlim(
+ 	int			error;
+ 	xfs_qcnt_t		hard, soft;
+ 
+-	if (!capable(CAP_SYS_ADMIN))
++	if (!vx_capable(CAP_SYS_ADMIN, VXC_QUOTA_CTL))
+ 		return XFS_ERROR(EPERM);
+ 
+ 	if ((newlim->d_fieldmask &
+Index: linux-2.6.20/fs/xfs/xfs_clnt.h
+===================================================================
+--- linux-2.6.20.orig/fs/xfs/xfs_clnt.h
++++ linux-2.6.20/fs/xfs/xfs_clnt.h
+@@ -99,5 +99,7 @@ struct xfs_mount_args {
+  */
+ #define XFSMNT2_COMPAT_IOSIZE	0x00000001	/* don't report large preferred
+ 						 * I/O size in stat(2) */
++#define XFSMNT2_TAGGED		0x80000000	/* context tagging */
++
+ 
+ #endif	/* __XFS_CLNT_H__ */
+Index: linux-2.6.20/fs/xfs/xfs_dinode.h
+===================================================================
+--- linux-2.6.20.orig/fs/xfs/xfs_dinode.h
++++ linux-2.6.20/fs/xfs/xfs_dinode.h
+@@ -53,7 +53,8 @@ typedef struct xfs_dinode_core
+ 	__uint32_t	di_gid;		/* owner's group id */
+ 	__uint32_t	di_nlink;	/* number of links to file */
+ 	__uint16_t	di_projid;	/* owner's project id */
+-	__uint8_t	di_pad[8];	/* unused, zeroed space */
++	__uint16_t	di_tag;		/* context tagging */
++	__uint8_t	di_pad[6];	/* unused, zeroed space */
+ 	__uint16_t	di_flushiter;	/* incremented on flush */
+ 	xfs_timestamp_t	di_atime;	/* time last accessed */
+ 	xfs_timestamp_t	di_mtime;	/* time last modified */
+@@ -257,6 +258,9 @@ typedef enum xfs_dinode_fmt
+ #define XFS_DIFLAG_EXTSIZE_BIT      11	/* inode extent size allocator hint */
+ #define XFS_DIFLAG_EXTSZINHERIT_BIT 12	/* inherit inode extent size */
+ #define XFS_DIFLAG_NODEFRAG_BIT     13	/* do not reorganize/defragment */
++#define XFS_DIFLAG_BARRIER_BIT	14	/* chroot() barrier */
++#define XFS_DIFLAG_IUNLINK_BIT	15	/* immutable unlink */
++
+ #define XFS_DIFLAG_REALTIME      (1 << XFS_DIFLAG_REALTIME_BIT)
+ #define XFS_DIFLAG_PREALLOC      (1 << XFS_DIFLAG_PREALLOC_BIT)
+ #define XFS_DIFLAG_NEWRTBM       (1 << XFS_DIFLAG_NEWRTBM_BIT)
+@@ -271,12 +275,15 @@ typedef enum xfs_dinode_fmt
+ #define XFS_DIFLAG_EXTSIZE       (1 << XFS_DIFLAG_EXTSIZE_BIT)
+ #define XFS_DIFLAG_EXTSZINHERIT  (1 << XFS_DIFLAG_EXTSZINHERIT_BIT)
+ #define XFS_DIFLAG_NODEFRAG      (1 << XFS_DIFLAG_NODEFRAG_BIT)
++#define XFS_DIFLAG_BARRIER	 (1 << XFS_DIFLAG_BARRIER_BIT)
++#define XFS_DIFLAG_IUNLINK	 (1 << XFS_DIFLAG_IUNLINK_BIT)
+ 
+ #define XFS_DIFLAG_ANY \
+ 	(XFS_DIFLAG_REALTIME | XFS_DIFLAG_PREALLOC | XFS_DIFLAG_NEWRTBM | \
+ 	 XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND | XFS_DIFLAG_SYNC | \
+ 	 XFS_DIFLAG_NOATIME | XFS_DIFLAG_NODUMP | XFS_DIFLAG_RTINHERIT | \
+ 	 XFS_DIFLAG_PROJINHERIT | XFS_DIFLAG_NOSYMLINKS | XFS_DIFLAG_EXTSIZE | \
+-	 XFS_DIFLAG_EXTSZINHERIT | XFS_DIFLAG_NODEFRAG)
++	 XFS_DIFLAG_EXTSZINHERIT | XFS_DIFLAG_NODEFRAG | XFS_DIFLAG_BARRIER | \
++	 XFS_DIFLAG_IUNLINK)
+ 
+ #endif	/* __XFS_DINODE_H__ */
+Index: linux-2.6.20/fs/xfs/xfs_fs.h
+===================================================================
+--- linux-2.6.20.orig/fs/xfs/xfs_fs.h
++++ linux-2.6.20/fs/xfs/xfs_fs.h
+@@ -66,6 +66,8 @@ struct fsxattr {
+ #define XFS_XFLAG_EXTSIZE	0x00000800	/* extent size allocator hint */
+ #define XFS_XFLAG_EXTSZINHERIT	0x00001000	/* inherit inode extent size */
+ #define XFS_XFLAG_NODEFRAG	0x00002000  	/* do not defragment */
++#define XFS_XFLAG_BARRIER	0x00004000	/* chroot() barrier */
++#define XFS_XFLAG_IUNLINK	0x00008000	/* immutable unlink */
+ #define XFS_XFLAG_HASATTR	0x80000000	/* no DIFLAG for this	*/
+ 
+ /*
+@@ -294,7 +296,8 @@ typedef struct xfs_bstat {
+ 	__s32		bs_extents;	/* number of extents		*/
+ 	__u32		bs_gen;		/* generation count		*/
+ 	__u16		bs_projid;	/* project id			*/
+-	unsigned char	bs_pad[14];	/* pad space, unused		*/
++	__u16		bs_tag;		/* context tagging		*/
++	unsigned char	bs_pad[12];	/* pad space, unused		*/
+ 	__u32		bs_dmevmask;	/* DMIG event mask		*/
+ 	__u16		bs_dmstate;	/* DMIG state info		*/
+ 	__u16		bs_aextents;	/* attribute number of extents	*/
+Index: linux-2.6.20/fs/xfs/xfs_inode.c
+===================================================================
+--- linux-2.6.20.orig/fs/xfs/xfs_inode.c
++++ linux-2.6.20/fs/xfs/xfs_inode.c
+@@ -50,6 +50,7 @@
+ #include "xfs_mac.h"
+ #include "xfs_acl.h"
+ 
++#include <linux/vs_tag.h>
+ 
+ kmem_zone_t *xfs_ifork_zone;
+ kmem_zone_t *xfs_inode_zone;
+@@ -736,20 +737,35 @@ xfs_xlate_dinode_core(
+ 	xfs_dinode_core_t	*buf_core = (xfs_dinode_core_t *)buf;
+ 	xfs_dinode_core_t	*mem_core = (xfs_dinode_core_t *)dip;
+ 	xfs_arch_t		arch = ARCH_CONVERT;
++	uint32_t		uid = 0, gid = 0;
++	uint16_t		tag = 0;
+ 
+ 	ASSERT(dir);
+ 
++	if (dir < 0) {
++		tag = mem_core->di_tag;
++		/* FIXME: supposed to use superblock flag */
++		uid = TAGINO_UID(1, mem_core->di_uid, tag);
++		gid = TAGINO_GID(1, mem_core->di_gid, tag);
++		tag = TAGINO_TAG(1, tag);
++	}
++
+ 	INT_XLATE(buf_core->di_magic, mem_core->di_magic, dir, arch);
+ 	INT_XLATE(buf_core->di_mode, mem_core->di_mode, dir, arch);
+ 	INT_XLATE(buf_core->di_version,	mem_core->di_version, dir, arch);
+ 	INT_XLATE(buf_core->di_format, mem_core->di_format, dir, arch);
+ 	INT_XLATE(buf_core->di_onlink, mem_core->di_onlink, dir, arch);
+-	INT_XLATE(buf_core->di_uid, mem_core->di_uid, dir, arch);
+-	INT_XLATE(buf_core->di_gid, mem_core->di_gid, dir, arch);
++	INT_XLATE(buf_core->di_uid, uid, dir, arch);
++	INT_XLATE(buf_core->di_gid, gid, dir, arch);
++	INT_XLATE(buf_core->di_tag, tag, dir, arch);
+ 	INT_XLATE(buf_core->di_nlink, mem_core->di_nlink, dir, arch);
+ 	INT_XLATE(buf_core->di_projid, mem_core->di_projid, dir, arch);
+ 
+ 	if (dir > 0) {
++		/* FIXME: supposed to use superblock flag */
++		mem_core->di_uid = INOTAG_UID(1, uid, gid);
++		mem_core->di_gid = INOTAG_GID(1, uid, gid);
++		mem_core->di_tag = INOTAG_TAG(1, uid, gid, tag);
+ 		memcpy(mem_core->di_pad, buf_core->di_pad,
+ 			sizeof(buf_core->di_pad));
+ 	} else {
+@@ -797,6 +813,10 @@ _xfs_dic2xflags(
+ 			flags |= XFS_XFLAG_PREALLOC;
+ 		if (di_flags & XFS_DIFLAG_IMMUTABLE)
+ 			flags |= XFS_XFLAG_IMMUTABLE;
++		if (di_flags & XFS_DIFLAG_IUNLINK)
++			flags |= XFS_XFLAG_IUNLINK;
++		if (di_flags & XFS_DIFLAG_BARRIER)
++			flags |= XFS_XFLAG_BARRIER;
+ 		if (di_flags & XFS_DIFLAG_APPEND)
+ 			flags |= XFS_XFLAG_APPEND;
+ 		if (di_flags & XFS_DIFLAG_SYNC)
+@@ -1128,6 +1148,7 @@ xfs_ialloc(
+ 	ASSERT(ip->i_d.di_nlink == nlink);
+ 	ip->i_d.di_uid = current_fsuid(cr);
+ 	ip->i_d.di_gid = current_fsgid(cr);
++	ip->i_d.di_tag = current_fstag(cr, vp);
+ 	ip->i_d.di_projid = prid;
+ 	memset(&(ip->i_d.di_pad[0]), 0, sizeof(ip->i_d.di_pad));
+ 
+Index: linux-2.6.20/fs/xfs/xfs_itable.c
+===================================================================
+--- linux-2.6.20.orig/fs/xfs/xfs_itable.c
++++ linux-2.6.20/fs/xfs/xfs_itable.c
+@@ -89,6 +89,7 @@ xfs_bulkstat_one_iget(
+ 	buf->bs_mode = dic->di_mode;
+ 	buf->bs_uid = dic->di_uid;
+ 	buf->bs_gid = dic->di_gid;
++	buf->bs_tag = dic->di_tag;
+ 	buf->bs_size = dic->di_size;
+ 	vn_atime_to_bstime(vp, &buf->bs_atime);
+ 	buf->bs_mtime.tv_sec = dic->di_mtime.t_sec;
+@@ -163,6 +164,7 @@ xfs_bulkstat_one_dinode(
+ 	buf->bs_mode = INT_GET(dic->di_mode, ARCH_CONVERT);
+ 	buf->bs_uid = INT_GET(dic->di_uid, ARCH_CONVERT);
+ 	buf->bs_gid = INT_GET(dic->di_gid, ARCH_CONVERT);
++	buf->bs_tag = INT_GET(dic->di_tag, ARCH_CONVERT);
+ 	buf->bs_size = INT_GET(dic->di_size, ARCH_CONVERT);
+ 	buf->bs_atime.tv_sec = INT_GET(dic->di_atime.t_sec, ARCH_CONVERT);
+ 	buf->bs_atime.tv_nsec = INT_GET(dic->di_atime.t_nsec, ARCH_CONVERT);
+Index: linux-2.6.20/fs/xfs/xfs_mount.h
+===================================================================
+--- linux-2.6.20.orig/fs/xfs/xfs_mount.h
++++ linux-2.6.20/fs/xfs/xfs_mount.h
+@@ -460,6 +460,7 @@ typedef struct xfs_mount {
+ #define XFS_MOUNT_NO_PERCPU_SB	(1ULL << 23)	/* don't use per-cpu superblock
+ 						   counters */
+ 
++#define XFS_MOUNT_TAGGED	(1ULL << 31)	/* context tagging */
+ 
+ /*
+  * Default minimum read and write sizes.
+Index: linux-2.6.20/fs/xfs/xfs_vfsops.c
+===================================================================
+--- linux-2.6.20.orig/fs/xfs/xfs_vfsops.c
++++ linux-2.6.20/fs/xfs/xfs_vfsops.c
+@@ -300,6 +300,8 @@ xfs_start_flags(
+ 
+ 	if (ap->flags2 & XFSMNT2_COMPAT_IOSIZE)
+ 		mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
++	if (ap->flags2 & XFSMNT2_TAGGED)
++		mp->m_flags |= XFS_MOUNT_TAGGED;
+ 
+ 	/*
+ 	 * no recovery flag requires a read-only mount
+@@ -394,6 +396,8 @@ xfs_finish_flags(
+ 			return XFS_ERROR(EINVAL);
+ 	}
+ 
++	if (ap->flags2 & XFSMNT2_TAGGED)
++		vfs->vfs_super->s_flags |= MS_TAGGED;
+ 	return 0;
+ }
+ 
+@@ -1645,6 +1649,9 @@ xfs_vget(
+ 					 * in stat(). */
+ #define MNTOPT_ATTR2	"attr2"		/* do use attr2 attribute format */
+ #define MNTOPT_NOATTR2	"noattr2"	/* do not use attr2 attribute format */
++#define MNTOPT_TAGXID	"tagxid"	/* context tagging for inodes */
++#define MNTOPT_TAGGED	"tag"		/* context tagging for inodes */
++#define MNTOPT_NOTAGTAG	"notag"		/* do not use context tagging */
+ 
+ STATIC unsigned long
+ suffix_strtoul(char *s, char **endp, unsigned int base)
+@@ -1831,6 +1838,19 @@ xfs_parseargs(
+ 			args->flags |= XFSMNT_ATTR2;
+ 		} else if (!strcmp(this_char, MNTOPT_NOATTR2)) {
+ 			args->flags &= ~XFSMNT_ATTR2;
++#ifndef CONFIG_TAGGING_NONE
++		} else if (!strcmp(this_char, MNTOPT_TAGGED)) {
++			args->flags2 |= XFSMNT2_TAGGED;
++		} else if (!strcmp(this_char, MNTOPT_NOTAGTAG)) {
++			args->flags2 &= ~XFSMNT2_TAGGED;
++		} else if (!strcmp(this_char, MNTOPT_TAGXID)) {
++			args->flags2 |= XFSMNT2_TAGGED;
++#endif
++#ifdef CONFIG_PROPAGATE
++		} else if (!strcmp(this_char, MNTOPT_TAGGED)) {
++			/* use value */
++			args->flags2 |= XFSMNT2_TAGGED;
++#endif
+ 		} else if (!strcmp(this_char, "osyncisdsync")) {
+ 			/* no-op, this is now the default */
+ 			cmn_err(CE_WARN,
+Index: linux-2.6.20/fs/xfs/xfs_vnodeops.c
+===================================================================
+--- linux-2.6.20.orig/fs/xfs/xfs_vnodeops.c
++++ linux-2.6.20/fs/xfs/xfs_vnodeops.c
+@@ -160,6 +160,7 @@ xfs_getattr(
+ 	vap->va_mode = ip->i_d.di_mode;
+ 	vap->va_uid = ip->i_d.di_uid;
+ 	vap->va_gid = ip->i_d.di_gid;
++	vap->va_tag = ip->i_d.di_tag;
+ 	vap->va_projid = ip->i_d.di_projid;
+ 
+ 	/*
+@@ -260,6 +261,7 @@ xfs_setattr(
+ 	uint			commit_flags=0;
+ 	uid_t			uid=0, iuid=0;
+ 	gid_t			gid=0, igid=0;
++	tag_t			tag=0, itag=0;
+ 	int			timeflags = 0;
+ 	bhv_vnode_t		*vp;
+ 	xfs_prid_t		projid=0, iprojid=0;
+@@ -316,6 +318,7 @@ xfs_setattr(
+ 	    (mask & (XFS_AT_UID|XFS_AT_GID|XFS_AT_PROJID))) {
+ 		uint	qflags = 0;
+ 
++		/* TODO: handle tagging? */
+ 		if ((mask & XFS_AT_UID) && XFS_IS_UQUOTA_ON(mp)) {
+ 			uid = vap->va_uid;
+ 			qflags |= XFS_QMOPT_UQUOTA;
+@@ -395,6 +398,8 @@ xfs_setattr(
+ 	if (mask &
+ 	    (XFS_AT_MODE|XFS_AT_XFLAGS|XFS_AT_EXTSIZE|XFS_AT_UID|
+ 	     XFS_AT_GID|XFS_AT_PROJID)) {
++		/* TODO: handle tagging? */
++
+ 		/*
+ 		 * CAP_FOWNER overrides the following restrictions:
+ 		 *
+@@ -443,7 +448,7 @@ xfs_setattr(
+ 	 * and can change the group id only to a group of which he
+ 	 * or she is a member.
+ 	 */
+-	if (mask & (XFS_AT_UID|XFS_AT_GID|XFS_AT_PROJID)) {
++	if (mask & (XFS_AT_UID|XFS_AT_GID|XFS_AT_TAG|XFS_AT_PROJID)) {
+ 		/*
+ 		 * These IDs could have changed since we last looked at them.
+ 		 * But, we're assured that if the ownership did change
+@@ -451,10 +456,12 @@ xfs_setattr(
+ 		 * would have changed also.
+ 		 */
+ 		iuid = ip->i_d.di_uid;
+-		iprojid = ip->i_d.di_projid;
+ 		igid = ip->i_d.di_gid;
+-		gid = (mask & XFS_AT_GID) ? vap->va_gid : igid;
++		itag = ip->i_d.di_tag;
++		iprojid = ip->i_d.di_projid;
+ 		uid = (mask & XFS_AT_UID) ? vap->va_uid : iuid;
++		gid = (mask & XFS_AT_GID) ? vap->va_gid : igid;
++		tag = (mask & XFS_AT_TAG) ? vap->va_tag : itag;
+ 		projid = (mask & XFS_AT_PROJID) ? (xfs_prid_t)vap->va_projid :
+ 			 iprojid;
+ 
+@@ -482,6 +489,7 @@ xfs_setattr(
+ 		if ((XFS_IS_UQUOTA_ON(mp) && iuid != uid) ||
+ 		    (XFS_IS_PQUOTA_ON(mp) && iprojid != projid) ||
+ 		    (XFS_IS_GQUOTA_ON(mp) && igid != gid)) {
++			/* TODO: handle tagging? */
+ 			ASSERT(tp);
+ 			code = XFS_QM_DQVOPCHOWNRESV(mp, tp, ip, udqp, gdqp,
+ 						capable(CAP_FOWNER) ?
+@@ -707,7 +715,7 @@ xfs_setattr(
+ 	 * and can change the group id only to a group of which he
+ 	 * or she is a member.
+ 	 */
+-	if (mask & (XFS_AT_UID|XFS_AT_GID|XFS_AT_PROJID)) {
++	if (mask & (XFS_AT_UID|XFS_AT_GID|XFS_AT_TAG|XFS_AT_PROJID)) {
+ 		/*
+ 		 * CAP_FSETID overrides the following restrictions:
+ 		 *
+@@ -723,6 +731,12 @@ xfs_setattr(
+ 		 * Change the ownerships and register quota modifications
+ 		 * in the transaction.
+ 		 */
++		if (itag != tag) {
++			if (XFS_IS_GQUOTA_ON(mp)) {
++				/* FIXME: handle tag quota? */
++			}
++			ip->i_d.di_tag = tag;
++		}
+ 		if (iuid != uid) {
+ 			if (XFS_IS_UQUOTA_ON(mp)) {
+ 				ASSERT(mask & XFS_AT_UID);
+@@ -803,6 +817,10 @@ xfs_setattr(
+ 			di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
+ 			if (vap->va_xflags & XFS_XFLAG_IMMUTABLE)
+ 				di_flags |= XFS_DIFLAG_IMMUTABLE;
++			if (vap->va_xflags & XFS_XFLAG_IUNLINK)
++				di_flags |= XFS_DIFLAG_IUNLINK;
++			if (vap->va_xflags & XFS_XFLAG_BARRIER)
++				di_flags |= XFS_DIFLAG_BARRIER;
+ 			if (vap->va_xflags & XFS_XFLAG_APPEND)
+ 				di_flags |= XFS_DIFLAG_APPEND;
+ 			if (vap->va_xflags & XFS_XFLAG_SYNC)
+Index: linux-2.6.20/include/asm-alpha/socket.h
+===================================================================
+--- linux-2.6.20.orig/include/asm-alpha/socket.h
++++ linux-2.6.20/include/asm-alpha/socket.h
+@@ -52,6 +52,7 @@
+ 
+ #define SO_PEERSEC		30
+ #define SO_PASSSEC		34
++#define SO_PEERTAG		35
+ 
+ /* Security levels - as per NRL IPv6 - don't actually do anything */
+ #define SO_SECURITY_AUTHENTICATION		19
+Index: linux-2.6.20/include/asm-arm/socket.h
+===================================================================
+--- linux-2.6.20.orig/include/asm-arm/socket.h
++++ linux-2.6.20/include/asm-arm/socket.h
+@@ -49,5 +49,6 @@
+ 
+ #define SO_PEERSEC		31
+ #define SO_PASSSEC		34
++#define SO_PEERTAG		35
+ 
+ #endif /* _ASM_SOCKET_H */
+Index: linux-2.6.20/include/asm-arm/tlb.h
+===================================================================
+--- linux-2.6.20.orig/include/asm-arm/tlb.h
++++ linux-2.6.20/include/asm-arm/tlb.h
+@@ -28,6 +28,7 @@
+ #else /* !CONFIG_MMU */
+ 
+ #include <asm/pgalloc.h>
++#include <linux/vs_memory.h>
+ 
+ /*
+  * TLB handling.  This allows us to remove pages from the page
+Index: linux-2.6.20/include/asm-arm26/tlb.h
+===================================================================
+--- linux-2.6.20.orig/include/asm-arm26/tlb.h
++++ linux-2.6.20/include/asm-arm26/tlb.h
+@@ -3,6 +3,7 @@
+ 
+ #include <asm/pgalloc.h>
+ #include <asm/tlbflush.h>
++#include <linux/vs_memory.h>
+ 
+ /*
+  * TLB handling.  This allows us to remove pages from the page
+Index: linux-2.6.20/include/asm-arm26/unistd.h
+===================================================================
+--- linux-2.6.20.orig/include/asm-arm26/unistd.h
++++ linux-2.6.20/include/asm-arm26/unistd.h
+@@ -302,6 +302,8 @@
+ #define __NR_mq_getsetattr		(__NR_SYSCALL_BASE+279)
+ #define __NR_waitid			(__NR_SYSCALL_BASE+280)
+ 
++#define __NR_vserver			(__NR_SYSCALL_BASE+313)
++
+ /*
+  * The following SWIs are ARM private. FIXME - make appropriate for arm26
+  */
+Index: linux-2.6.20/include/asm-cris/socket.h
+===================================================================
+--- linux-2.6.20.orig/include/asm-cris/socket.h
++++ linux-2.6.20/include/asm-cris/socket.h
+@@ -51,6 +51,7 @@
+ 
+ #define SO_PEERSEC             31
+ #define SO_PASSSEC		34
++#define SO_PEERTAG		35
+ 
+ #endif /* _ASM_SOCKET_H */
+ 
+Index: linux-2.6.20/include/asm-frv/socket.h
+===================================================================
+--- linux-2.6.20.orig/include/asm-frv/socket.h
++++ linux-2.6.20/include/asm-frv/socket.h
+@@ -49,6 +49,7 @@
+ 
+ #define SO_PEERSEC		31
+ #define SO_PASSSEC		34
++#define SO_PEERTAG		35
+ 
+ #endif /* _ASM_SOCKET_H */
+ 
+Index: linux-2.6.20/include/asm-generic/tlb.h
+===================================================================
+--- linux-2.6.20.orig/include/asm-generic/tlb.h
++++ linux-2.6.20/include/asm-generic/tlb.h
+@@ -14,6 +14,7 @@
+ #define _ASM_GENERIC__TLB_H
+ 
+ #include <linux/swap.h>
++#include <linux/vs_memory.h>
+ #include <asm/pgalloc.h>
+ #include <asm/tlbflush.h>
+ 
+Index: linux-2.6.20/include/asm-h8300/socket.h
+===================================================================
+--- linux-2.6.20.orig/include/asm-h8300/socket.h
++++ linux-2.6.20/include/asm-h8300/socket.h
+@@ -49,5 +49,6 @@
+ 
+ #define SO_PEERSEC		31
+ #define SO_PASSSEC		34
++#define SO_PEERTAG		35
+ 
+ #endif /* _ASM_SOCKET_H */
+Index: linux-2.6.20/include/asm-i386/elf.h
+===================================================================
+--- linux-2.6.20.orig/include/asm-i386/elf.h
++++ linux-2.6.20/include/asm-i386/elf.h
+@@ -75,7 +75,7 @@ typedef struct user_fxsr_struct elf_fpxr
+    the loader.  We need to make sure that it is out of the way of the program
+    that it will "exec", and that there is sufficient room for the brk.  */
+ 
+-#define ELF_ET_DYN_BASE         (TASK_SIZE / 3 * 2)
++#define ELF_ET_DYN_BASE		((TASK_UNMAPPED_BASE) * 2)
+ 
+ /* regs is struct pt_regs, pr_reg is elf_gregset_t (which is
+    now struct_user_regs, they are different) */
+Index: linux-2.6.20/include/asm-i386/socket.h
+===================================================================
+--- linux-2.6.20.orig/include/asm-i386/socket.h
++++ linux-2.6.20/include/asm-i386/socket.h
+@@ -49,5 +49,6 @@
+ 
+ #define SO_PEERSEC		31
+ #define SO_PASSSEC		34
++#define SO_PEERTAG		35
+ 
+ #endif /* _ASM_SOCKET_H */
+Index: linux-2.6.20/include/asm-ia64/socket.h
+===================================================================
+--- linux-2.6.20.orig/include/asm-ia64/socket.h
++++ linux-2.6.20/include/asm-ia64/socket.h
+@@ -58,5 +58,6 @@
+ 
+ #define SO_PEERSEC             31
+ #define SO_PASSSEC		34
++#define SO_PEERTAG		35
+ 
+ #endif /* _ASM_IA64_SOCKET_H */
+Index: linux-2.6.20/include/asm-ia64/tlb.h
+===================================================================
+--- linux-2.6.20.orig/include/asm-ia64/tlb.h
++++ linux-2.6.20/include/asm-ia64/tlb.h
+@@ -40,6 +40,7 @@
+ #include <linux/mm.h>
+ #include <linux/pagemap.h>
+ #include <linux/swap.h>
++#include <linux/vs_memory.h>
+ 
+ #include <asm/pgalloc.h>
+ #include <asm/processor.h>
+Index: linux-2.6.20/include/asm-m32r/socket.h
+===================================================================
+--- linux-2.6.20.orig/include/asm-m32r/socket.h
++++ linux-2.6.20/include/asm-m32r/socket.h
+@@ -49,5 +49,6 @@
+ 
+ #define SO_PEERSEC		31
+ #define SO_PASSSEC		34
++#define SO_PEERTAG		35
+ 
+ #endif /* _ASM_M32R_SOCKET_H */
+Index: linux-2.6.20/include/asm-mips/socket.h
+===================================================================
+--- linux-2.6.20.orig/include/asm-mips/socket.h
++++ linux-2.6.20/include/asm-mips/socket.h
+@@ -70,6 +70,7 @@ To add: #define SO_REUSEPORT 0x0200	/* A
+ #define SO_SNDBUFFORCE		31
+ #define SO_RCVBUFFORCE		33
+ #define SO_PASSSEC		34
++#define SO_PEERTAG		35
+ 
+ #ifdef __KERNEL__
+ 
+Index: linux-2.6.20/include/asm-parisc/socket.h
+===================================================================
+--- linux-2.6.20.orig/include/asm-parisc/socket.h
++++ linux-2.6.20/include/asm-parisc/socket.h
+@@ -49,5 +49,6 @@
+ 
+ #define SO_PEERSEC		0x401d
+ #define SO_PASSSEC		0x401e
++#define SO_PEERTAG		0x401f
+ 
+ #endif /* _ASM_SOCKET_H */
+Index: linux-2.6.20/include/asm-powerpc/socket.h
+===================================================================
+--- linux-2.6.20.orig/include/asm-powerpc/socket.h
++++ linux-2.6.20/include/asm-powerpc/socket.h
+@@ -56,5 +56,6 @@
+ 
+ #define SO_PEERSEC		31
+ #define SO_PASSSEC		34
++#define SO_PEERTAG		35
+ 
+ #endif	/* _ASM_POWERPC_SOCKET_H */
+Index: linux-2.6.20/include/asm-powerpc/systbl.h
+===================================================================
+--- linux-2.6.20.orig/include/asm-powerpc/systbl.h
++++ linux-2.6.20/include/asm-powerpc/systbl.h
+@@ -260,7 +260,7 @@ COMPAT_SYS_SPU(fstatfs64)
+ SYSX(sys_ni_syscall, ppc_fadvise64_64, ppc_fadvise64_64)
+ PPC_SYS_SPU(rtas)
+ OLDSYS(debug_setcontext)
+-SYSCALL(ni_syscall)
++SYSX(sys_vserver, sys32_vserver, sys_vserver)
+ COMPAT_SYS(migrate_pages)
+ COMPAT_SYS(mbind)
+ COMPAT_SYS(get_mempolicy)
+Index: linux-2.6.20/include/asm-powerpc/unistd.h
+===================================================================
+--- linux-2.6.20.orig/include/asm-powerpc/unistd.h
++++ linux-2.6.20/include/asm-powerpc/unistd.h
+@@ -275,7 +275,7 @@
+ #endif
+ #define __NR_rtas		255
+ #define __NR_sys_debug_setcontext 256
+-/* Number 257 is reserved for vserver */
++#define __NR_vserver		257
+ #define __NR_migrate_pages	258
+ #define __NR_mbind		259
+ #define __NR_get_mempolicy	260
+Index: linux-2.6.20/include/asm-s390/socket.h
+===================================================================
+--- linux-2.6.20.orig/include/asm-s390/socket.h
++++ linux-2.6.20/include/asm-s390/socket.h
+@@ -57,5 +57,6 @@
+ 
+ #define SO_PEERSEC		31
+ #define SO_PASSSEC		34
++#define SO_PEERTAG		35
+ 
+ #endif /* _ASM_SOCKET_H */
+Index: linux-2.6.20/include/asm-s390/unistd.h
+===================================================================
+--- linux-2.6.20.orig/include/asm-s390/unistd.h
++++ linux-2.6.20/include/asm-s390/unistd.h
+@@ -202,7 +202,7 @@
+ #define __NR_clock_gettime	(__NR_timer_create+6)
+ #define __NR_clock_getres	(__NR_timer_create+7)
+ #define __NR_clock_nanosleep	(__NR_timer_create+8)
+-/* Number 263 is reserved for vserver */
++#define __NR_vserver		263
+ #define __NR_statfs64		265
+ #define __NR_fstatfs64		266
+ #define __NR_remap_file_pages	267
+Index: linux-2.6.20/include/asm-sh/socket.h
+===================================================================
+--- linux-2.6.20.orig/include/asm-sh/socket.h
++++ linux-2.6.20/include/asm-sh/socket.h
+@@ -49,5 +49,6 @@
+ 
+ #define SO_PEERSEC		31
+ #define SO_PASSSEC		34
++#define SO_PEERTAG		35
+ 
+ #endif /* __ASM_SH_SOCKET_H */
+Index: linux-2.6.20/include/asm-sparc/socket.h
+===================================================================
+--- linux-2.6.20.orig/include/asm-sparc/socket.h
++++ linux-2.6.20/include/asm-sparc/socket.h
+@@ -49,6 +49,7 @@
+ 
+ #define SO_PEERSEC		0x001e
+ #define SO_PASSSEC		0x001f
++#define SO_PEERTAG		0x0200
+ 
+ /* Security levels - as per NRL IPv6 - don't actually do anything */
+ #define SO_SECURITY_AUTHENTICATION		0x5001
+Index: linux-2.6.20/include/asm-sparc/unistd.h
+===================================================================
+--- linux-2.6.20.orig/include/asm-sparc/unistd.h
++++ linux-2.6.20/include/asm-sparc/unistd.h
+@@ -283,7 +283,7 @@
+ #define __NR_timer_getoverrun	264
+ #define __NR_timer_delete	265
+ #define __NR_timer_create	266
+-/* #define __NR_vserver		267 Reserved for VSERVER */
++#define __NR_vserver		267
+ #define __NR_io_setup		268
+ #define __NR_io_destroy		269
+ #define __NR_io_submit		270
+Index: linux-2.6.20/include/asm-sparc64/socket.h
+===================================================================
+--- linux-2.6.20.orig/include/asm-sparc64/socket.h
++++ linux-2.6.20/include/asm-sparc64/socket.h
+@@ -49,6 +49,7 @@
+ 
+ #define SO_PEERSEC		0x001e
+ #define SO_PASSSEC		0x001f
++#define SO_PEERTAG		0x0200
+ 
+ /* Security levels - as per NRL IPv6 - don't actually do anything */
+ #define SO_SECURITY_AUTHENTICATION		0x5001
+Index: linux-2.6.20/include/asm-sparc64/tlb.h
+===================================================================
+--- linux-2.6.20.orig/include/asm-sparc64/tlb.h
++++ linux-2.6.20/include/asm-sparc64/tlb.h
+@@ -2,6 +2,7 @@
+ #define _SPARC64_TLB_H
+ 
+ #include <linux/swap.h>
++#include <linux/vs_memory.h>
+ #include <asm/pgalloc.h>
+ #include <asm/tlbflush.h>
+ #include <asm/mmu_context.h>
+Index: linux-2.6.20/include/asm-sparc64/unistd.h
+===================================================================
+--- linux-2.6.20.orig/include/asm-sparc64/unistd.h
++++ linux-2.6.20/include/asm-sparc64/unistd.h
+@@ -285,7 +285,7 @@
+ #define __NR_timer_getoverrun	264
+ #define __NR_timer_delete	265
+ #define __NR_timer_create	266
+-/* #define __NR_vserver		267 Reserved for VSERVER */
++#define __NR_vserver		267
+ #define __NR_io_setup		268
+ #define __NR_io_destroy		269
+ #define __NR_io_submit		270
+Index: linux-2.6.20/include/asm-v850/socket.h
+===================================================================
+--- linux-2.6.20.orig/include/asm-v850/socket.h
++++ linux-2.6.20/include/asm-v850/socket.h
+@@ -49,5 +49,6 @@
+ 
+ #define SO_PEERSEC		31
+ #define SO_PASSSEC		34
++#define SO_PEERTAG		35
+ 
+ #endif /* __V850_SOCKET_H__ */
+Index: linux-2.6.20/include/asm-x86_64/socket.h
+===================================================================
+--- linux-2.6.20.orig/include/asm-x86_64/socket.h
++++ linux-2.6.20/include/asm-x86_64/socket.h
+@@ -49,5 +49,6 @@
+ 
+ #define SO_PEERSEC             31
+ #define SO_PASSSEC		34
++#define SO_PEERTAG		35
+ 
+ #endif /* _ASM_SOCKET_H */
+Index: linux-2.6.20/include/asm-x86_64/unistd.h
+===================================================================
+--- linux-2.6.20.orig/include/asm-x86_64/unistd.h
++++ linux-2.6.20/include/asm-x86_64/unistd.h
+@@ -532,7 +532,7 @@ __SYSCALL(__NR_tgkill, sys_tgkill)
+ #define __NR_utimes		235
+ __SYSCALL(__NR_utimes, sys_utimes)
+ #define __NR_vserver		236
+-__SYSCALL(__NR_vserver, sys_ni_syscall)
++__SYSCALL(__NR_vserver, sys_vserver)
+ #define __NR_mbind 		237
+ __SYSCALL(__NR_mbind, sys_mbind)
+ #define __NR_set_mempolicy 	238
+Index: linux-2.6.20/include/asm-xtensa/socket.h
+===================================================================
+--- linux-2.6.20.orig/include/asm-xtensa/socket.h
++++ linux-2.6.20/include/asm-xtensa/socket.h
+@@ -60,5 +60,6 @@
+ #define SO_ACCEPTCONN		30
+ #define SO_PEERSEC		31
+ #define SO_PASSSEC		34
++#define SO_PEERTAG		35
+ 
+ #endif	/* _XTENSA_SOCKET_H */
+Index: linux-2.6.20/include/linux/Kbuild
+===================================================================
+--- linux-2.6.20.orig/include/linux/Kbuild
++++ linux-2.6.20/include/linux/Kbuild
+@@ -339,3 +339,6 @@ unifdef-y += wireless.h
+ unifdef-y += xfrm.h
+ 
+ objhdr-y += version.h
++
++header-y += vserver/
++
+Index: linux-2.6.20/include/linux/capability.h
+===================================================================
+--- linux-2.6.20.orig/include/linux/capability.h
++++ linux-2.6.20/include/linux/capability.h
+@@ -235,6 +235,7 @@ typedef __u32 kernel_cap_t;
+    arbitrary SCSI commands */
+ /* Allow setting encryption key on loopback filesystem */
+ /* Allow setting zone reclaim policy */
++/* Allow the selection of a security context */
+ 
+ #define CAP_SYS_ADMIN        21
+ 
+@@ -288,6 +289,11 @@ typedef __u32 kernel_cap_t;
+ 
+ #define CAP_AUDIT_CONTROL    30
+ 
++/* Allow context manipulations */
++/* Allow changing context info on files */
++
++#define CAP_CONTEXT	     31
++
+ #ifdef __KERNEL__
+ /* 
+  * Bounding set
+Index: linux-2.6.20/include/linux/devpts_fs.h
+===================================================================
+--- linux-2.6.20.orig/include/linux/devpts_fs.h
++++ linux-2.6.20/include/linux/devpts_fs.h
+@@ -30,5 +30,7 @@ static inline void devpts_pty_kill(int n
+ 
+ #endif
+ 
++#define DEVPTS_SUPER_MAGIC	0x00001cd1
++
+ 
+ #endif /* _LINUX_DEVPTS_FS_H */
+Index: linux-2.6.20/include/linux/ext2_fs.h
+===================================================================
+--- linux-2.6.20.orig/include/linux/ext2_fs.h
++++ linux-2.6.20/include/linux/ext2_fs.h
+@@ -188,6 +188,8 @@ struct ext2_group_desc
+ #define EXT2_NOTAIL_FL			FS_NOTAIL_FL	/* file tail should not be merged */
+ #define EXT2_DIRSYNC_FL			FS_DIRSYNC_FL	/* dirsync behaviour (directories only) */
+ #define EXT2_TOPDIR_FL			FS_TOPDIR_FL	/* Top of directory hierarchies*/
++#define EXT2_BARRIER_FL			FS_BARRIER_FL	/* Barrier for chroot() */
++#define EXT2_IUNLINK_FL			FS_IUNLINK_FL	/* Immutable unlink */
+ #define EXT2_RESERVED_FL		FS_RESERVED_FL	/* reserved for ext2 lib */
+ 
+ #define EXT2_FL_USER_VISIBLE		FS_FL_USER_VISIBLE	/* User visible flags */
+@@ -244,7 +246,7 @@ struct ext2_inode {
+ 		struct {
+ 			__u8	l_i_frag;	/* Fragment number */
+ 			__u8	l_i_fsize;	/* Fragment size */
+-			__u16	i_pad1;
++			__u16	l_i_tag;	/* Context Tag */
+ 			__le16	l_i_uid_high;	/* these 2 fields    */
+ 			__le16	l_i_gid_high;	/* were reserved2[0] */
+ 			__u32	l_i_reserved2;
+@@ -276,6 +278,7 @@ struct ext2_inode {
+ #define i_gid_low	i_gid
+ #define i_uid_high	osd2.linux2.l_i_uid_high
+ #define i_gid_high	osd2.linux2.l_i_gid_high
++#define i_raw_tag	osd2.linux2.l_i_tag
+ #define i_reserved2	osd2.linux2.l_i_reserved2
+ #endif
+ 
+@@ -317,8 +320,9 @@ struct ext2_inode {
+ #define EXT2_MOUNT_XATTR_USER		0x004000  /* Extended user attributes */
+ #define EXT2_MOUNT_POSIX_ACL		0x008000  /* POSIX Access Control Lists */
+ #define EXT2_MOUNT_XIP			0x010000  /* Execute in place */
+-#define EXT2_MOUNT_USRQUOTA		0x020000 /* user quota */
+-#define EXT2_MOUNT_GRPQUOTA		0x040000 /* group quota */
++#define EXT2_MOUNT_USRQUOTA		0x020000  /* user quota */
++#define EXT2_MOUNT_GRPQUOTA		0x040000  /* group quota */
++#define EXT2_MOUNT_TAGGED		(1<<24)	  /* Enable Context Tags */
+ 
+ 
+ #define clear_opt(o, opt)		o &= ~EXT2_MOUNT_##opt
+Index: linux-2.6.20/include/linux/ext3_fs.h
+===================================================================
+--- linux-2.6.20.orig/include/linux/ext3_fs.h
++++ linux-2.6.20/include/linux/ext3_fs.h
+@@ -177,6 +177,8 @@ struct ext3_group_desc
+ #define EXT3_NOTAIL_FL			0x00008000 /* file tail should not be merged */
+ #define EXT3_DIRSYNC_FL			0x00010000 /* dirsync behaviour (directories only) */
+ #define EXT3_TOPDIR_FL			0x00020000 /* Top of directory hierarchies*/
++#define EXT3_BARRIER_FL			0x04000000 /* Barrier for chroot() */
++#define EXT3_IUNLINK_FL			0x08000000 /* Immutable unlink */
+ #define EXT3_RESERVED_FL		0x80000000 /* reserved for ext3 lib */
+ 
+ #define EXT3_FL_USER_VISIBLE		0x0003DFFF /* User visible flags */
+@@ -296,7 +298,7 @@ struct ext3_inode {
+ 		struct {
+ 			__u8	l_i_frag;	/* Fragment number */
+ 			__u8	l_i_fsize;	/* Fragment size */
+-			__u16	i_pad1;
++			__u16	l_i_tag;	/* Context Tag */
+ 			__le16	l_i_uid_high;	/* these 2 fields    */
+ 			__le16	l_i_gid_high;	/* were reserved2[0] */
+ 			__u32	l_i_reserved2;
+@@ -330,6 +332,7 @@ struct ext3_inode {
+ #define i_gid_low	i_gid
+ #define i_uid_high	osd2.linux2.l_i_uid_high
+ #define i_gid_high	osd2.linux2.l_i_gid_high
++#define i_raw_tag	osd2.linux2.l_i_tag
+ #define i_reserved2	osd2.linux2.l_i_reserved2
+ 
+ #elif defined(__GNU__)
+@@ -384,6 +387,7 @@ struct ext3_inode {
+ #define EXT3_MOUNT_QUOTA		0x80000 /* Some quota option set */
+ #define EXT3_MOUNT_USRQUOTA		0x100000 /* "old" user quota */
+ #define EXT3_MOUNT_GRPQUOTA		0x200000 /* "old" group quota */
++#define EXT3_MOUNT_TAGGED		(1<<24) /* Enable Context Tags */
+ 
+ /* Compatibility, for having both ext2_fs.h and ext3_fs.h included at once */
+ #ifndef _LINUX_EXT2_FS_H
+@@ -812,6 +816,7 @@ struct buffer_head * ext3_bread (handle_
+ int ext3_get_blocks_handle(handle_t *handle, struct inode *inode,
+ 	sector_t iblock, unsigned long maxblocks, struct buffer_head *bh_result,
+ 	int create, int extend_disksize);
++extern int ext3_sync_flags(struct inode *inode);
+ 
+ extern void ext3_read_inode (struct inode *);
+ extern int  ext3_write_inode (struct inode *, int);
+Index: linux-2.6.20/include/linux/ext3_jbd.h
+===================================================================
+--- linux-2.6.20.orig/include/linux/ext3_jbd.h
++++ linux-2.6.20/include/linux/ext3_jbd.h
+@@ -77,10 +77,10 @@
+ #define EXT3_QUOTA_TRANS_BLOCKS(sb) (test_opt(sb, QUOTA) ? 2 : 0)
+ /* Amount of blocks needed for quota insert/delete - we do some block writes
+  * but inode, sb and group updates are done only once */
+-#define EXT3_QUOTA_INIT_BLOCKS(sb) (test_opt(sb, QUOTA) ? (DQUOT_INIT_ALLOC*\
+-		(EXT3_SINGLEDATA_TRANS_BLOCKS-3)+3+DQUOT_INIT_REWRITE) : 0)
+-#define EXT3_QUOTA_DEL_BLOCKS(sb) (test_opt(sb, QUOTA) ? (DQUOT_DEL_ALLOC*\
+-		(EXT3_SINGLEDATA_TRANS_BLOCKS-3)+3+DQUOT_DEL_REWRITE) : 0)
++#define EXT3_QUOTA_INIT_BLOCKS(sb) (test_opt(sb, QUOTA) ? \
++	(DQUOT_INIT_ALLOC*(EXT3_SINGLEDATA_TRANS_BLOCKS-3)+3+DQUOT_INIT_REWRITE) : 0)
++#define EXT3_QUOTA_DEL_BLOCKS(sb) (test_opt(sb, QUOTA) ? \
++	(DQUOT_DEL_ALLOC*(EXT3_SINGLEDATA_TRANS_BLOCKS-3)+3+DQUOT_DEL_REWRITE) : 0)
+ #else
+ #define EXT3_QUOTA_TRANS_BLOCKS(sb) 0
+ #define EXT3_QUOTA_INIT_BLOCKS(sb) 0
+Index: linux-2.6.20/include/linux/ext4_fs.h
+===================================================================
+--- linux-2.6.20.orig/include/linux/ext4_fs.h
++++ linux-2.6.20/include/linux/ext4_fs.h
+@@ -189,8 +189,10 @@ struct ext4_group_desc
+ #define EXT4_NOTAIL_FL			0x00008000 /* file tail should not be merged */
+ #define EXT4_DIRSYNC_FL			0x00010000 /* dirsync behaviour (directories only) */
+ #define EXT4_TOPDIR_FL			0x00020000 /* Top of directory hierarchies*/
+-#define EXT4_RESERVED_FL		0x80000000 /* reserved for ext4 lib */
+ #define EXT4_EXTENTS_FL			0x00080000 /* Inode uses extents */
++#define EXT4_BARRIER_FL			0x04000000 /* Barrier for chroot() */
++#define EXT4_IUNLINK_FL			0x08000000 /* Immutable unlink */
++#define EXT4_RESERVED_FL		0x80000000 /* reserved for ext4 lib */
+ 
+ #define EXT4_FL_USER_VISIBLE		0x000BDFFF /* User visible flags */
+ #define EXT4_FL_USER_MODIFIABLE		0x000380FF /* User modifiable flags */
+@@ -312,7 +314,8 @@ struct ext4_inode {
+ 			__le16	l_i_file_acl_high;
+ 			__le16	l_i_uid_high;	/* these 2 fields    */
+ 			__le16	l_i_gid_high;	/* were reserved2[0] */
+-			__u32	l_i_reserved2;
++			__u16	l_i_tag;	/* Context Tag */
++			__u16	l_i_reserved2;
+ 		} linux2;
+ 		struct {
+ 			__u8	h_i_frag;	/* Fragment number */
+@@ -344,6 +347,7 @@ struct ext4_inode {
+ #define i_gid_low	i_gid
+ #define i_uid_high	osd2.linux2.l_i_uid_high
+ #define i_gid_high	osd2.linux2.l_i_gid_high
++#define i_raw_tag	osd2.linux2.l_i_tag
+ #define i_reserved2	osd2.linux2.l_i_reserved2
+ 
+ #elif defined(__GNU__)
+@@ -400,6 +404,7 @@ struct ext4_inode {
+ #define EXT4_MOUNT_USRQUOTA		0x100000 /* "old" user quota */
+ #define EXT4_MOUNT_GRPQUOTA		0x200000 /* "old" group quota */
+ #define EXT4_MOUNT_EXTENTS		0x400000 /* Extents support */
++#define EXT4_MOUNT_TAGGED		(1<<24) /* Enable Context Tags */
+ 
+ /* Compatibility, for having both ext2_fs.h and ext4_fs.h included at once */
+ #ifndef _LINUX_EXT2_FS_H
+@@ -843,6 +848,7 @@ struct buffer_head * ext4_bread (handle_
+ int ext4_get_blocks_handle(handle_t *handle, struct inode *inode,
+ 	sector_t iblock, unsigned long maxblocks, struct buffer_head *bh_result,
+ 	int create, int extend_disksize);
++extern int ext4_sync_flags(struct inode *inode);
+ 
+ extern void ext4_read_inode (struct inode *);
+ extern int  ext4_write_inode (struct inode *, int);
+Index: linux-2.6.20/include/linux/fs.h
+===================================================================
+--- linux-2.6.20.orig/include/linux/fs.h
++++ linux-2.6.20/include/linux/fs.h
+@@ -121,6 +121,8 @@ extern int dir_notify_enable;
+ #define MS_SLAVE	(1<<19)	/* change to slave */
+ #define MS_SHARED	(1<<20)	/* change to shared */
+ #define MS_RELATIME	(1<<21)	/* Update atime relative to mtime/ctime. */
++#define MS_TAGGED	(1<<24) /* use generic inode tagging */
++#define MS_TAGID	(1<<25) /* use specific tag for this mount */
+ #define MS_ACTIVE	(1<<30)
+ #define MS_NOUSER	(1<<31)
+ 
+@@ -147,6 +149,8 @@ extern int dir_notify_enable;
+ #define S_NOCMTIME	128	/* Do not update file c/mtime */
+ #define S_SWAPFILE	256	/* Do not truncate: swapon got its bmaps */
+ #define S_PRIVATE	512	/* Inode is fs-internal */
++#define S_BARRIER	1024	/* Barrier for chroot() */
++#define S_IUNLINK	2048	/* Immutable unlink */
+ 
+ /*
+  * Note that nosuid etc flags are inode-specific: setting some file-system
+@@ -163,23 +167,35 @@ extern int dir_notify_enable;
+  */
+ #define __IS_FLG(inode,flg) ((inode)->i_sb->s_flags & (flg))
+ 
+-#define IS_RDONLY(inode) ((inode)->i_sb->s_flags & MS_RDONLY)
++#define IS_RDONLY(inode)	__IS_FLG(inode, MS_RDONLY)
+ #define IS_SYNC(inode)		(__IS_FLG(inode, MS_SYNCHRONOUS) || \
+ 					((inode)->i_flags & S_SYNC))
+ #define IS_DIRSYNC(inode)	(__IS_FLG(inode, MS_SYNCHRONOUS|MS_DIRSYNC) || \
+ 					((inode)->i_flags & (S_SYNC|S_DIRSYNC)))
+ #define IS_MANDLOCK(inode)	__IS_FLG(inode, MS_MANDLOCK)
++#define IS_TAGGED(inode)	__IS_FLG(inode, MS_TAGGED)
+ 
+ #define IS_NOQUOTA(inode)	((inode)->i_flags & S_NOQUOTA)
+ #define IS_APPEND(inode)	((inode)->i_flags & S_APPEND)
+ #define IS_IMMUTABLE(inode)	((inode)->i_flags & S_IMMUTABLE)
++#define IS_IUNLINK(inode)	((inode)->i_flags & S_IUNLINK)
++#define IS_IXORUNLINK(inode)	((IS_IUNLINK(inode) ? S_IMMUTABLE : 0) ^ IS_IMMUTABLE(inode))
+ #define IS_POSIXACL(inode)	__IS_FLG(inode, MS_POSIXACL)
+ 
++#define IS_BARRIER(inode)	(S_ISDIR((inode)->i_mode) && ((inode)->i_flags & S_BARRIER))
+ #define IS_DEADDIR(inode)	((inode)->i_flags & S_DEAD)
+ #define IS_NOCMTIME(inode)	((inode)->i_flags & S_NOCMTIME)
+ #define IS_SWAPFILE(inode)	((inode)->i_flags & S_SWAPFILE)
+ #define IS_PRIVATE(inode)	((inode)->i_flags & S_PRIVATE)
+ 
++#ifdef CONFIG_VSERVER_COWBL
++#  define IS_COW(inode)		(IS_IUNLINK(inode) && IS_IMMUTABLE(inode))
++#  define IS_COW_LINK(inode)	(S_ISREG((inode)->i_mode) && ((inode)->i_nlink > 1))
++#else
++#  define IS_COW(inode)		(0)
++#  define IS_COW_LINK(inode)	(0)
++#endif
++
+ /* the read-only stuff doesn't really belong here, but any other place is
+    probably as bad and I don't want to create yet another include file. */
+ 
+@@ -253,12 +269,13 @@ extern int dir_notify_enable;
+ #define FS_TOPDIR_FL			0x00020000 /* Top of directory hierarchies*/
+ #define FS_EXTENT_FL			0x00080000 /* Extents */
+ #define FS_DIRECTIO_FL			0x00100000 /* Use direct i/o */
++#define FS_BARRIER_FL			0x04000000 /* Barrier for chroot() */
++#define FS_IUNLINK_FL			0x08000000 /* Immutable unlink */
+ #define FS_RESERVED_FL			0x80000000 /* reserved for ext2 lib */
+ 
+ #define FS_FL_USER_VISIBLE		0x0003DFFF /* User visible flags */
+ #define FS_FL_USER_MODIFIABLE		0x000380FF /* User modifiable flags */
+ 
+-
+ #define SYNC_FILE_RANGE_WAIT_BEFORE	1
+ #define SYNC_FILE_RANGE_WRITE		2
+ #define SYNC_FILE_RANGE_WAIT_AFTER	4
+@@ -324,6 +341,7 @@ typedef void (dio_iodone_t)(struct kiocb
+ #define ATTR_KILL_SUID	2048
+ #define ATTR_KILL_SGID	4096
+ #define ATTR_FILE	8192
++#define ATTR_TAG	16384
+ 
+ /*
+  * This is the Inode Attributes structure, used for notify_change().  It
+@@ -339,6 +357,7 @@ struct iattr {
+ 	umode_t		ia_mode;
+ 	uid_t		ia_uid;
+ 	gid_t		ia_gid;
++	tag_t		ia_tag;
+ 	loff_t		ia_size;
+ 	struct timespec	ia_atime;
+ 	struct timespec	ia_mtime;
+@@ -352,6 +371,9 @@ struct iattr {
+ 	struct file	*ia_file;
+ };
+ 
++#define ATTR_FLAG_BARRIER	512	/* Barrier for chroot() */
++#define ATTR_FLAG_IUNLINK	1024	/* Immutable unlink */
++
+ /*
+  * Includes for diskquotas.
+  */
+@@ -534,6 +556,7 @@ struct inode {
+ 	unsigned int		i_nlink;
+ 	uid_t			i_uid;
+ 	gid_t			i_gid;
++	tag_t			i_tag;
+ 	dev_t			i_rdev;
+ 	unsigned long		i_version;
+ 	loff_t			i_size;
+@@ -556,6 +579,9 @@ struct inode {
+ 	struct file_lock	*i_flock;
+ 	struct address_space	*i_mapping;
+ 	struct address_space	i_data;
++#ifdef CONFIG_QUOTACTL
++	struct dqhash		*i_dqh;
++#endif
+ #ifdef CONFIG_QUOTA
+ 	struct dquot		*i_dquot[MAXQUOTAS];
+ #endif
+@@ -724,6 +750,7 @@ struct file {
+ 	loff_t			f_pos;
+ 	struct fown_struct	f_owner;
+ 	unsigned int		f_uid, f_gid;
++	xid_t			f_xid;
+ 	struct file_ra_state	f_ra;
+ 
+ 	unsigned long		f_version;
+@@ -806,6 +833,7 @@ struct file_lock {
+ 	unsigned char fl_type;
+ 	loff_t fl_start;
+ 	loff_t fl_end;
++	xid_t fl_xid;
+ 
+ 	struct fasync_struct *	fl_fasync; /* for lease break notifications */
+ 	unsigned long fl_break_time;	/* for nonblocking lease breaks */
+@@ -907,7 +935,7 @@ struct super_block {
+ 	unsigned long long	s_maxbytes;	/* Max file size */
+ 	struct file_system_type	*s_type;
+ 	struct super_operations	*s_op;
+-	struct dquot_operations	*dq_op;
++	struct dquot_operations	*s_qop;
+  	struct quotactl_ops	*s_qcop;
+ 	struct export_operations *s_export_op;
+ 	unsigned long		s_flags;
+@@ -932,7 +960,7 @@ struct super_block {
+ 
+ 	struct block_device	*s_bdev;
+ 	struct list_head	s_instances;
+-	struct quota_info	s_dquot;	/* Diskquota specific options */
++	struct dqhash		*s_dqh;		/* Diskquota hash */
+ 
+ 	int			s_frozen;
+ 	wait_queue_head_t	s_wait_unfrozen;
+@@ -979,12 +1007,12 @@ extern void unlock_super(struct super_bl
+  */
+ extern int vfs_permission(struct nameidata *, int);
+ extern int vfs_create(struct inode *, struct dentry *, int, struct nameidata *);
+-extern int vfs_mkdir(struct inode *, struct dentry *, int);
+-extern int vfs_mknod(struct inode *, struct dentry *, int, dev_t);
+-extern int vfs_symlink(struct inode *, struct dentry *, const char *, int);
+-extern int vfs_link(struct dentry *, struct inode *, struct dentry *);
+-extern int vfs_rmdir(struct inode *, struct dentry *);
+-extern int vfs_unlink(struct inode *, struct dentry *);
++extern int vfs_mkdir(struct inode *, struct dentry *, int, struct nameidata *);
++extern int vfs_mknod(struct inode *, struct dentry *, int, dev_t, struct nameidata *);
++extern int vfs_symlink(struct inode *, struct dentry *, const char *, int, struct nameidata *);
++extern int vfs_link(struct dentry *, struct inode *, struct dentry *, struct nameidata *);
++extern int vfs_rmdir(struct inode *, struct dentry *, struct nameidata *);
++extern int vfs_unlink(struct inode *, struct dentry *, struct nameidata *);
+ extern int vfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *);
+ 
+ /*
+@@ -1124,6 +1152,7 @@ struct inode_operations {
+ 	ssize_t (*listxattr) (struct dentry *, char *, size_t);
+ 	int (*removexattr) (struct dentry *, const char *);
+ 	void (*truncate_range)(struct inode *, loff_t, loff_t);
++	int (*sync_flags) (struct inode *);
+ };
+ 
+ struct seq_file;
+@@ -1139,6 +1168,7 @@ extern ssize_t vfs_readv(struct file *, 
+ 		unsigned long, loff_t *);
+ extern ssize_t vfs_writev(struct file *, const struct iovec __user *,
+ 		unsigned long, loff_t *);
++ssize_t vfs_sendfile(struct file *, struct file *, loff_t *, size_t, loff_t);
+ 
+ /*
+  * NOTE: write_inode, delete_inode, clear_inode, put_inode can be called
+@@ -1168,8 +1198,8 @@ struct super_operations {
+ 	int (*show_options)(struct seq_file *, struct vfsmount *);
+ 	int (*show_stats)(struct seq_file *, struct vfsmount *);
+ #ifdef CONFIG_QUOTA
+-	ssize_t (*quota_read)(struct super_block *, int, char *, size_t, loff_t);
+-	ssize_t (*quota_write)(struct super_block *, int, const char *, size_t, loff_t);
++	ssize_t (*quota_read)(struct dqhash *, int, char *, size_t, loff_t);
++	ssize_t (*quota_write)(struct dqhash *, int, const char *, size_t, loff_t);
+ #endif
+ };
+ 
+@@ -1681,7 +1711,7 @@ extern struct inode *new_inode(struct su
+ extern int __remove_suid(struct dentry *, int);
+ extern int should_remove_suid(struct dentry *);
+ extern int remove_suid(struct dentry *);
+-extern void remove_dquot_ref(struct super_block *, int, struct list_head *);
++extern void remove_dquot_ref(struct dqhash *, int, struct list_head *);
+ 
+ extern void __insert_inode_hash(struct inode *, unsigned long hashval);
+ extern void remove_inode_hash(struct inode *);
+@@ -1717,6 +1747,7 @@ extern ssize_t generic_file_buffered_wri
+ extern ssize_t do_sync_read(struct file *filp, char __user *buf, size_t len, loff_t *ppos);
+ extern ssize_t do_sync_write(struct file *filp, const char __user *buf, size_t len, loff_t *ppos);
+ extern ssize_t generic_file_sendfile(struct file *, loff_t *, size_t, read_actor_t, void *);
++extern ssize_t generic_file_sendpage(struct file *, struct page *, int, size_t, loff_t *, int);
+ extern void do_generic_mapping_read(struct address_space *mapping,
+ 				    struct file_ra_state *, struct file *,
+ 				    loff_t *, read_descriptor_t *, read_actor_t);
+@@ -1850,6 +1881,7 @@ extern int dcache_dir_open(struct inode 
+ extern int dcache_dir_close(struct inode *, struct file *);
+ extern loff_t dcache_dir_lseek(struct file *, loff_t, int);
+ extern int dcache_readdir(struct file *, void *, filldir_t);
++extern int dcache_readdir_filter(struct file *, void *, filldir_t, int (*)(struct dentry *));
+ extern int simple_getattr(struct vfsmount *, struct dentry *, struct kstat *);
+ extern int simple_statfs(struct dentry *, struct kstatfs *);
+ extern int simple_link(struct dentry *, struct inode *, struct dentry *);
+Index: linux-2.6.20/include/linux/init_task.h
+===================================================================
+--- linux-2.6.20.orig/include/linux/init_task.h
++++ linux-2.6.20/include/linux/init_task.h
+@@ -141,6 +141,10 @@ extern struct group_info init_groups;
+ 	.pi_lock	= SPIN_LOCK_UNLOCKED,				\
+ 	INIT_TRACE_IRQFLAGS						\
+ 	INIT_LOCKDEP							\
++	.xid		= 0,						\
++	.vx_info	= NULL,						\
++	.nid		= 0,						\
++	.nx_info	= NULL,						\
+ }
+ 
+ 
+Index: linux-2.6.20/include/linux/ipc.h
+===================================================================
+--- linux-2.6.20.orig/include/linux/ipc.h
++++ linux-2.6.20/include/linux/ipc.h
+@@ -63,6 +63,7 @@ struct kern_ipc_perm
+ 	key_t		key;
+ 	uid_t		uid;
+ 	gid_t		gid;
++	xid_t		xid;
+ 	uid_t		cuid;
+ 	gid_t		cgid;
+ 	mode_t		mode; 
+Index: linux-2.6.20/include/linux/jffs2.h
+===================================================================
+--- linux-2.6.20.orig/include/linux/jffs2.h
++++ linux-2.6.20/include/linux/jffs2.h
+@@ -82,12 +82,36 @@
+ //#define JFFS2_NODETYPE_OPTIONS (JFFS2_FEATURE_RWCOMPAT_COPY | JFFS2_NODE_ACCURATE | 4)
+ 
+ 
+-#define JFFS2_INO_FLAG_PREREAD	  1	/* Do read_inode() for this one at
++#define JFFS2_INO_FLAG_PREREAD	  0x01	/* Do read_inode() for this one at
+ 					   mount time, don't wait for it to
+ 					   happen later */
+-#define JFFS2_INO_FLAG_USERCOMPR  2	/* User has requested a specific
++#define JFFS2_INO_FLAG_USERCOMPR  0x02	/* User has requested a specific
+ 					   compression type */
+ 
++#define JFFS2_INO_FLAG_IMMUTABLE  0x10	/* immutable node */
++#define JFFS2_INO_FLAG_IUNLINK	  0x20	/* immutable unlink */
++#define JFFS2_INO_FLAG_BARRIER	  0x40	/* barrier */
++
++#define	JFFS2_USER_VISIBLE	  0x10
++#define	JFFS2_USER_MODIFIABLE	  0x10
++
++/*
++ * Mount flags
++ */
++#define JFFS2_MOUNT_TAGGED	(1<<24)	  /* Enable Context Tags */
++
++#define clear_opt(o, opt)	o &= ~JFFS2_MOUNT_##opt
++#define set_opt(o, opt)		o |= JFFS2_MOUNT_##opt
++
++/*
++ * Maximal mount counts between two filesystem checks
++ */
++#define EXT2_DFL_MAX_MNT_COUNT		20	/* Allow 20 mounts */
++#define EXT2_DFL_CHECKINTERVAL		0	/* Don't use interval check */
++
++/*
++ * Behaviour when detecting errors
++ */
+ 
+ /* These can go once we've made sure we've caught all uses without
+    byteswapping */
+@@ -97,7 +121,7 @@ typedef struct {
+ } __attribute__((packed)) jint32_t;
+ 
+ typedef struct {
+-	uint32_t m;
++	uint16_t m;
+ } __attribute__((packed)) jmode_t;
+ 
+ typedef struct {
+@@ -145,7 +169,8 @@ struct jffs2_raw_inode
+ 	jint32_t hdr_crc;
+ 	jint32_t ino;        /* Inode number.  */
+ 	jint32_t version;    /* Version number.  */
+-	jmode_t mode;       /* The file's type or mode.  */
++	jmode_t mode;        /* The file's type or mode.  */
++	jint16_t tag;	     /* context tagging */
+ 	jint16_t uid;        /* The file's owner.  */
+ 	jint16_t gid;        /* The file's group.  */
+ 	jint32_t isize;      /* Total resultant size of this inode (used for truncations)  */
+Index: linux-2.6.20/include/linux/loop.h
+===================================================================
+--- linux-2.6.20.orig/include/linux/loop.h
++++ linux-2.6.20/include/linux/loop.h
+@@ -45,6 +45,7 @@ struct loop_device {
+ 	struct loop_func_table *lo_encryption;
+ 	__u32           lo_init[2];
+ 	uid_t		lo_key_owner;	/* Who set the key */
++	xid_t		lo_xid;
+ 	int		(*ioctl)(struct loop_device *, int cmd, 
+ 				 unsigned long arg); 
+ 
+Index: linux-2.6.20/include/linux/major.h
+===================================================================
+--- linux-2.6.20.orig/include/linux/major.h
++++ linux-2.6.20/include/linux/major.h
+@@ -15,6 +15,7 @@
+ #define HD_MAJOR		IDE0_MAJOR
+ #define PTY_SLAVE_MAJOR		3
+ #define TTY_MAJOR		4
++#define VROOT_MAJOR		4
+ #define TTYAUX_MAJOR		5
+ #define LP_MAJOR		6
+ #define VCS_MAJOR		7
+Index: linux-2.6.20/include/linux/mount.h
+===================================================================
+--- linux-2.6.20.orig/include/linux/mount.h
++++ linux-2.6.20/include/linux/mount.h
+@@ -28,12 +28,16 @@ struct mnt_namespace;
+ #define MNT_NOATIME	0x08
+ #define MNT_NODIRATIME	0x10
+ #define MNT_RELATIME	0x20
++#define MNT_RDONLY	0x40
++
++#define MNT_IS_RDONLY(m)	((m) && ((m)->mnt_flags & MNT_RDONLY))
+ 
+ #define MNT_SHRINKABLE	0x100
+ 
+ #define MNT_SHARED	0x1000	/* if the vfsmount is a shared mount */
+ #define MNT_UNBINDABLE	0x2000	/* if the vfsmount is a unbindable mount */
+ #define MNT_PNODE_MASK	0x3000	/* propogation flag mask */
++#define MNT_TAGID	0x8000
+ 
+ struct vfsmount {
+ 	struct list_head mnt_hash;
+@@ -55,6 +59,7 @@ struct vfsmount {
+ 	struct vfsmount *mnt_master;	/* slave is on master->mnt_slave_list */
+ 	struct mnt_namespace *mnt_ns;	/* containing namespace */
+ 	int mnt_pinned;
++	tag_t mnt_tag;			/* tagging used for vfsmount */
+ };
+ 
+ static inline struct vfsmount *mntget(struct vfsmount *mnt)
+Index: linux-2.6.20/include/linux/net.h
+===================================================================
+--- linux-2.6.20.orig/include/linux/net.h
++++ linux-2.6.20/include/linux/net.h
+@@ -63,6 +63,7 @@ typedef enum {
+ #define SOCK_NOSPACE		2
+ #define SOCK_PASSCRED		3
+ #define SOCK_PASSSEC		4
++#define SOCK_USER_SOCKET	5
+ 
+ #ifndef ARCH_HAS_SOCKET_TYPES
+ /**
+Index: linux-2.6.20/include/linux/nfs_mount.h
+===================================================================
+--- linux-2.6.20.orig/include/linux/nfs_mount.h
++++ linux-2.6.20/include/linux/nfs_mount.h
+@@ -61,6 +61,7 @@ struct nfs_mount_data {
+ #define NFS_MOUNT_NOACL		0x0800	/* 4 */
+ #define NFS_MOUNT_STRICTLOCK	0x1000	/* reserved for NFSv4 */
+ #define NFS_MOUNT_SECFLAVOUR	0x2000	/* 5 */
++#define NFS_MOUNT_TAGGED	0x8000	/* context tagging */
+ #define NFS_MOUNT_FLAGMASK	0xFFFF
+ 
+ #endif
+Index: linux-2.6.20/include/linux/nsproxy.h
+===================================================================
+--- linux-2.6.20.orig/include/linux/nsproxy.h
++++ linux-2.6.20/include/linux/nsproxy.h
+@@ -36,6 +36,11 @@ int copy_namespaces(int flags, struct ta
+ void get_task_namespaces(struct task_struct *tsk);
+ void free_nsproxy(struct nsproxy *ns);
+ 
++static inline void get_nsproxy(struct nsproxy *ns)
++{
++	atomic_inc(&ns->count);
++}
++
+ static inline void put_nsproxy(struct nsproxy *ns)
+ {
+ 	if (atomic_dec_and_test(&ns->count)) {
+Index: linux-2.6.20/include/linux/percpu.h
+===================================================================
+--- linux-2.6.20.orig/include/linux/percpu.h
++++ linux-2.6.20/include/linux/percpu.h
+@@ -11,7 +11,7 @@
+ 
+ /* Enough to cover all DEFINE_PER_CPUs in kernel, including modules. */
+ #ifndef PERCPU_ENOUGH_ROOM
+-#define PERCPU_ENOUGH_ROOM 32768
++#define PERCPU_ENOUGH_ROOM 65536
+ #endif
+ 
+ /*
+Index: linux-2.6.20/include/linux/pid.h
+===================================================================
+--- linux-2.6.20.orig/include/linux/pid.h
++++ linux-2.6.20/include/linux/pid.h
+@@ -8,7 +8,8 @@ enum pid_type
+ 	PIDTYPE_PID,
+ 	PIDTYPE_PGID,
+ 	PIDTYPE_SID,
+-	PIDTYPE_MAX
++	PIDTYPE_MAX,
++	PIDTYPE_REALPID
+ };
+ 
+ /*
+@@ -112,7 +113,8 @@ static inline pid_t pid_nr(struct pid *p
+ 		struct pid *pid___ = find_pid(who);			\
+ 		if (pid___ != NULL)					\
+ 			hlist_for_each_entry_rcu((task), pos___,	\
+-				&pid___->tasks[type], pids[type].node) {
++				&pid___->tasks[type], pids[type].node)	\
++			if (vx_check((task)->xid, VS_ADMIN_P|VS_IDENT)) {
+ 
+ #define while_each_task_pid(who, type, task)				\
+ 			}						\
+@@ -124,7 +126,8 @@ static inline pid_t pid_nr(struct pid *p
+ 		struct hlist_node *pos___;				\
+ 		if (pid != NULL)					\
+ 			hlist_for_each_entry_rcu((task), pos___,	\
+-				&pid->tasks[type], pids[type].node) {
++				&pid->tasks[type], pids[type].node)	\
++			if (vx_check((task)->xid, VS_ADMIN_P|VS_IDENT)) {
+ 
+ #define while_each_pid_task(pid, type, task)				\
+ 			}						\
+Index: linux-2.6.20/include/linux/proc_fs.h
+===================================================================
+--- linux-2.6.20.orig/include/linux/proc_fs.h
++++ linux-2.6.20/include/linux/proc_fs.h
+@@ -54,6 +54,7 @@ struct proc_dir_entry {
+ 	nlink_t nlink;
+ 	uid_t uid;
+ 	gid_t gid;
++	int vx_flags;
+ 	loff_t size;
+ 	struct inode_operations * proc_iops;
+ 	const struct file_operations * proc_fops;
+@@ -244,13 +245,20 @@ static inline void kclist_add(struct kco
+ extern void kclist_add(struct kcore_list *, void *, size_t);
+ #endif
+ 
++struct vx_info;
++struct nx_info;
++
+ union proc_op {
+ 	int (*proc_get_link)(struct inode *, struct dentry **, struct vfsmount **);
+ 	int (*proc_read)(struct task_struct *task, char *page);
++	int (*proc_vs_read)(char *page);
++	int (*proc_vxi_read)(struct vx_info *vxi, char *page);
++	int (*proc_nxi_read)(struct nx_info *nxi, char *page);
+ };
+ 
+ struct proc_inode {
+ 	struct pid *pid;
++	int vx_flags;
+ 	int fd;
+ 	union proc_op op;
+ 	struct proc_dir_entry *pde;
+Index: linux-2.6.20/include/linux/quota.h
+===================================================================
+--- linux-2.6.20.orig/include/linux/quota.h
++++ linux-2.6.20/include/linux/quota.h
+@@ -55,6 +55,13 @@ extern spinlock_t dq_data_lock;
+ #define kb2qb(x) ((x) >> (QUOTABLOCK_BITS-10))
+ #define toqb(x) (((x) + QUOTABLOCK_SIZE - 1) >> QUOTABLOCK_BITS)
+ 
++/* are NULL dqhash ptrs valid? */
++#ifdef HANDLE_DQHASH_NULL
++#define	dqhash_valid(hash)      ((hash) != NULL)
++#else
++#define	dqhash_valid(hash)      (0 == 0)
++#endif
++
+ #define MAXQUOTAS 2
+ #define USRQUOTA  0		/* element used for user quotas */
+ #define GRPQUOTA  1		/* element used for group quotas */
+@@ -176,19 +183,20 @@ struct mem_dqinfo {
+ 	} u;
+ };
+ 
+-struct super_block;
++struct dqhash;
+ 
+ #define DQF_MASK 0xffff		/* Mask for format specific flags */
+ #define DQF_INFO_DIRTY_B 16
+ #define DQF_INFO_DIRTY (1 << DQF_INFO_DIRTY_B)	/* Is info dirty? */
+ 
+-extern void mark_info_dirty(struct super_block *sb, int type);
++extern void mark_info_dirty(struct dqhash *hash, int type);
++
+ #define info_dirty(info) test_bit(DQF_INFO_DIRTY_B, &(info)->dqi_flags)
+ #define info_any_dquot_dirty(info) (!list_empty(&(info)->dqi_dirty_list))
+ #define info_any_dirty(info) (info_dirty(info) || info_any_dquot_dirty(info))
+ 
+-#define sb_dqopt(sb) (&(sb)->s_dquot)
+-#define sb_dqinfo(sb, type) (sb_dqopt(sb)->info+(type))
++#define dqh_dqopt(hash) (&(hash)->dqh_dqopt)
++#define dqh_dqinfo(hash, type) (dqh_dqopt(hash)->info+(type))
+ 
+ struct dqstats {
+ 	int lookups;
+@@ -218,7 +226,7 @@ struct dquot {
+ 	struct mutex dq_lock;		/* dquot IO lock */
+ 	atomic_t dq_count;		/* Use count */
+ 	wait_queue_head_t dq_wait_unused;	/* Wait queue for dquot to become unused */
+-	struct super_block *dq_sb;	/* superblock this applies to */
++	struct dqhash *dq_dqh;		/* quota hash backpointer */
+ 	unsigned int dq_id;		/* ID this applies to (uid, gid) */
+ 	loff_t dq_off;			/* Offset of dquot on disk */
+ 	unsigned long dq_flags;		/* See DQ_* */
+@@ -233,13 +241,14 @@ struct dquot {
+ 
+ /* Operations which must be implemented by each quota format */
+ struct quota_format_ops {
+-	int (*check_quota_file)(struct super_block *sb, int type);	/* Detect whether file is in our format */
+-	int (*read_file_info)(struct super_block *sb, int type);	/* Read main info about file - called on quotaon() */
+-	int (*write_file_info)(struct super_block *sb, int type);	/* Write main info about file */
+-	int (*free_file_info)(struct super_block *sb, int type);	/* Called on quotaoff() */
+-	int (*read_dqblk)(struct dquot *dquot);		/* Read structure for one user */
+-	int (*commit_dqblk)(struct dquot *dquot);	/* Write structure for one user */
+-	int (*release_dqblk)(struct dquot *dquot);	/* Called when last reference to dquot is being dropped */
++	int (*check_quota_file)(struct dqhash *, int);	/* Detect whether file is in our format */
++	int (*read_file_info)(struct dqhash *, int);	/* Read main info about file - called on quotaon() */
++	int (*write_file_info)(struct dqhash *, int);	/* Write main info about file */
++	int (*free_file_info)(struct dqhash *, int);	/* Called on quotaoff() */
++
++	int (*read_dqblk)(struct dquot *);	/* Read structure for one user */
++	int (*commit_dqblk)(struct dquot *);	/* Write structure for one user */
++	int (*release_dqblk)(struct dquot *);	/* Called when last reference to dquot is being dropped */
+ };
+ 
+ /* Operations working with dquots */
+@@ -255,22 +264,22 @@ struct dquot_operations {
+ 	int (*acquire_dquot) (struct dquot *);		/* Quota is going to be created on disk */
+ 	int (*release_dquot) (struct dquot *);		/* Quota is going to be deleted from disk */
+ 	int (*mark_dirty) (struct dquot *);		/* Dquot is marked dirty */
+-	int (*write_info) (struct super_block *, int);	/* Write of quota "superblock" */
++	int (*write_info) (struct dqhash *, int);	/* Write of quota "superblock" */
+ };
+ 
+ /* Operations handling requests from userspace */
+ struct quotactl_ops {
+-	int (*quota_on)(struct super_block *, int, int, char *);
+-	int (*quota_off)(struct super_block *, int);
+-	int (*quota_sync)(struct super_block *, int);
+-	int (*get_info)(struct super_block *, int, struct if_dqinfo *);
+-	int (*set_info)(struct super_block *, int, struct if_dqinfo *);
+-	int (*get_dqblk)(struct super_block *, int, qid_t, struct if_dqblk *);
+-	int (*set_dqblk)(struct super_block *, int, qid_t, struct if_dqblk *);
+-	int (*get_xstate)(struct super_block *, struct fs_quota_stat *);
+-	int (*set_xstate)(struct super_block *, unsigned int, int);
+-	int (*get_xquota)(struct super_block *, int, qid_t, struct fs_disk_quota *);
+-	int (*set_xquota)(struct super_block *, int, qid_t, struct fs_disk_quota *);
++	int (*quota_on)(struct dqhash *, int, int, char *);
++	int (*quota_off)(struct dqhash *, int);
++	int (*quota_sync)(struct dqhash *, int);
++	int (*get_info)(struct dqhash *, int, struct if_dqinfo *);
++	int (*set_info)(struct dqhash *, int, struct if_dqinfo *);
++	int (*get_dqblk)(struct dqhash *, int, qid_t, struct if_dqblk *);
++	int (*set_dqblk)(struct dqhash *, int, qid_t, struct if_dqblk *);
++	int (*get_xstate)(struct dqhash *, struct fs_quota_stat *);
++	int (*set_xstate)(struct dqhash *, unsigned int, int);
++	int (*get_xquota)(struct dqhash *, int, qid_t, struct fs_disk_quota *);
++	int (*set_xquota)(struct dqhash *, int, qid_t, struct fs_disk_quota *);
+ };
+ 
+ struct quota_format_type {
+@@ -293,16 +302,15 @@ struct quota_info {
+ 	struct quota_format_ops *ops[MAXQUOTAS];	/* Operations for each type */
+ };
+ 
+-/* Inline would be better but we need to dereference super_block which is not defined yet */
+-int mark_dquot_dirty(struct dquot *dquot);
+ 
+ #define dquot_dirty(dquot) test_bit(DQ_MOD_B, &(dquot)->dq_flags)
+ 
+-#define sb_has_quota_enabled(sb, type) ((type)==USRQUOTA ? \
+-	(sb_dqopt(sb)->flags & DQUOT_USR_ENABLED) : (sb_dqopt(sb)->flags & DQUOT_GRP_ENABLED))
++#define dqh_has_quota_enabled(hash, type) (dqhash_valid(hash) && ((type)==USRQUOTA ? \
++	(dqh_dqopt(hash)->flags & DQUOT_USR_ENABLED) : (dqh_dqopt(hash)->flags & DQUOT_GRP_ENABLED)))
++
++#define dqh_any_quota_enabled(hash) (dqhash_valid(hash) && \
++	(dqh_has_quota_enabled(hash, USRQUOTA) || dqh_has_quota_enabled(hash, GRPQUOTA)))
+ 
+-#define sb_any_quota_enabled(sb) (sb_has_quota_enabled(sb, USRQUOTA) | \
+-				  sb_has_quota_enabled(sb, GRPQUOTA))
+ 
+ int register_quota_format(struct quota_format_type *fmt);
+ void unregister_quota_format(struct quota_format_type *fmt);
+@@ -317,6 +325,50 @@ struct quota_module_name {
+ 	{QFMT_VFS_V0, "quota_v2"},\
+ 	{0, NULL}}
+ 
++struct dqhash {
++	struct list_head dqh_list;	/* List of all quota hashes */
++	unsigned int dqh_id;		/* ID for hash */
++	atomic_t dqh_count;		/* Use count */
++	struct quota_info dqh_dqopt;	/* Diskquota specific options */
++	struct dquot_operations	*dqh_qop;
++	struct quotactl_ops *dqh_qcop;
++	struct super_block *dqh_sb;	/* super block */
++	unsigned int dqh_hash_bits;
++	unsigned int dqh_hash_mask;
++	struct hlist_head *dqh_hash;
++};
++
++#ifdef CONFIG_QUOTACTL
++
++struct dqhash *new_dqhash(struct super_block *, unsigned int);
++void destroy_dqhash(struct dqhash *);
++struct dqhash *find_dqhash(unsigned int);
++
++static inline void dqhput(struct dqhash *hash)
++{
++	if (dqhash_valid(hash))
++		if (atomic_dec_and_test(&hash->dqh_count))
++			destroy_dqhash(hash);
++}
++
++static inline struct dqhash *dqhget(struct dqhash *hash)
++{
++	if (dqhash_valid(hash))
++		atomic_inc(&hash->dqh_count);
++	return hash;
++}
++
++#else /* CONFIG_QUOTACTL */
++
++#define new_dqhash(sb, dqdom)		(0)
++#define find_dqhash(dqdom)		(0)
++#define destroy_dqhash(hash)		do { } while(0)
++
++#define dqhput(hash)			do { } while(0)
++#define dqhget(hash)			(hash)
++
++#endif /* CONFIG_QUOTACTL */
++
+ #else
+ 
+ # /* nodep */ include <sys/cdefs.h>
+Index: linux-2.6.20/include/linux/quotaops.h
+===================================================================
+--- linux-2.6.20.orig/include/linux/quotaops.h
++++ linux-2.6.20/include/linux/quotaops.h
+@@ -19,7 +19,7 @@
+ /*
+  * declaration of quota_function calls in kernel.
+  */
+-extern void sync_dquots(struct super_block *sb, int type);
++extern void sync_dquots(struct dqhash *hash, int type);
+ 
+ extern int dquot_initialize(struct inode *inode, int type);
+ extern int dquot_drop(struct inode *inode);
+@@ -34,22 +34,22 @@ extern int dquot_transfer(struct inode *
+ extern int dquot_commit(struct dquot *dquot);
+ extern int dquot_acquire(struct dquot *dquot);
+ extern int dquot_release(struct dquot *dquot);
+-extern int dquot_commit_info(struct super_block *sb, int type);
++extern int dquot_commit_info(struct dqhash *hash, int type);
+ extern int dquot_mark_dquot_dirty(struct dquot *dquot);
+ 
+ int remove_inode_dquot_ref(struct inode *inode, int type,
+ 			   struct list_head *tofree_head);
+ 
+-extern int vfs_quota_on(struct super_block *sb, int type, int format_id, char *path);
+-extern int vfs_quota_on_mount(struct super_block *sb, char *qf_name,
++extern int vfs_quota_on(struct dqhash *hash, int type, int format_id, char *path);
++extern int vfs_quota_on_mount(struct dqhash *hash, char *qf_name,
+ 		int format_id, int type);
+-extern int vfs_quota_off(struct super_block *sb, int type);
+-#define vfs_quota_off_mount(sb, type) vfs_quota_off(sb, type)
+-extern int vfs_quota_sync(struct super_block *sb, int type);
+-extern int vfs_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
+-extern int vfs_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
+-extern int vfs_get_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di);
+-extern int vfs_set_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di);
++extern int vfs_quota_off(struct dqhash *hash, int type);
++#define vfs_quota_off_mount(dqh, type) vfs_quota_off(dqh, type)
++extern int vfs_quota_sync(struct dqhash *hash, int type);
++extern int vfs_get_dqinfo(struct dqhash *hash, int type, struct if_dqinfo *ii);
++extern int vfs_set_dqinfo(struct dqhash *hash, int type, struct if_dqinfo *ii);
++extern int vfs_get_dqblk(struct dqhash *hash, int type, qid_t id, struct if_dqblk *di);
++extern int vfs_set_dqblk(struct dqhash *hash, int type, qid_t id, struct if_dqblk *di);
+ 
+ /*
+  * Operations supported for diskquotas.
+@@ -64,9 +64,12 @@ extern struct quotactl_ops vfs_quotactl_
+  * need a lot of space in journal for dquot structure allocation. */
+ static __inline__ void DQUOT_INIT(struct inode *inode)
+ {
+-	BUG_ON(!inode->i_sb);
+-	if (sb_any_quota_enabled(inode->i_sb) && !IS_NOQUOTA(inode))
+-		inode->i_sb->dq_op->initialize(inode, -1);
++	if (!dqhash_valid(inode->i_dqh))
++		return;
++	BUG_ON(!inode->i_dqh);
++	// printk("DQUOT_INIT(%p,%p,%d)\n", inode, inode->i_dqh, dqh_any_quota_enabled(inode->i_dqh));
++	if (dqh_any_quota_enabled(inode->i_dqh) && !IS_NOQUOTA(inode))
++		inode->i_dqh->dqh_qop->initialize(inode, -1);
+ }
+ 
+ /* The same as with DQUOT_INIT */
+@@ -75,8 +78,8 @@ static __inline__ void DQUOT_DROP(struct
+ 	/* Here we can get arbitrary inode from clear_inode() so we have
+ 	 * to be careful. OTOH we don't need locking as quota operations
+ 	 * are allowed to change only at mount time */
+-	if (!IS_NOQUOTA(inode) && inode->i_sb && inode->i_sb->dq_op
+-	    && inode->i_sb->dq_op->drop) {
++	if (!IS_NOQUOTA(inode) && inode->i_dqh && inode->i_dqh->dqh_qop
++	    && inode->i_dqh->dqh_qop->drop) {
+ 		int cnt;
+ 		/* Test before calling to rule out calls from proc and such
+                  * where we are not allowed to block. Note that this is
+@@ -87,7 +90,7 @@ static __inline__ void DQUOT_DROP(struct
+ 			if (inode->i_dquot[cnt] != NODQUOT)
+ 				break;
+ 		if (cnt < MAXQUOTAS)
+-			inode->i_sb->dq_op->drop(inode);
++			inode->i_dqh->dqh_qop->drop(inode);
+ 	}
+ }
+ 
+@@ -95,9 +98,9 @@ static __inline__ void DQUOT_DROP(struct
+  * a transaction (deadlocks possible otherwise) */
+ static __inline__ int DQUOT_PREALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
+ {
+-	if (sb_any_quota_enabled(inode->i_sb)) {
++	if (dqh_any_quota_enabled(inode->i_dqh)) {
+ 		/* Used space is updated in alloc_space() */
+-		if (inode->i_sb->dq_op->alloc_space(inode, nr, 1) == NO_QUOTA)
++		if (inode->i_dqh->dqh_qop->alloc_space(inode, nr, 1) == NO_QUOTA)
+ 			return 1;
+ 	}
+ 	else
+@@ -115,9 +118,9 @@ static __inline__ int DQUOT_PREALLOC_SPA
+ 
+ static __inline__ int DQUOT_ALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
+ {
+-	if (sb_any_quota_enabled(inode->i_sb)) {
++	if (dqh_any_quota_enabled(inode->i_dqh)) {
+ 		/* Used space is updated in alloc_space() */
+-		if (inode->i_sb->dq_op->alloc_space(inode, nr, 0) == NO_QUOTA)
++		if (inode->i_dqh->dqh_qop->alloc_space(inode, nr, 0) == NO_QUOTA)
+ 			return 1;
+ 	}
+ 	else
+@@ -135,9 +138,9 @@ static __inline__ int DQUOT_ALLOC_SPACE(
+ 
+ static __inline__ int DQUOT_ALLOC_INODE(struct inode *inode)
+ {
+-	if (sb_any_quota_enabled(inode->i_sb)) {
++	if (dqh_any_quota_enabled(inode->i_dqh)) {
+ 		DQUOT_INIT(inode);
+-		if (inode->i_sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA)
++		if (inode->i_dqh->dqh_qop->alloc_inode(inode, 1) == NO_QUOTA)
+ 			return 1;
+ 	}
+ 	return 0;
+@@ -145,8 +148,8 @@ static __inline__ int DQUOT_ALLOC_INODE(
+ 
+ static __inline__ void DQUOT_FREE_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
+ {
+-	if (sb_any_quota_enabled(inode->i_sb))
+-		inode->i_sb->dq_op->free_space(inode, nr);
++	if (dqh_any_quota_enabled(inode->i_dqh))
++		inode->i_dqh->dqh_qop->free_space(inode, nr);
+ 	else
+ 		inode_sub_bytes(inode, nr);
+ }
+@@ -159,29 +162,30 @@ static __inline__ void DQUOT_FREE_SPACE(
+ 
+ static __inline__ void DQUOT_FREE_INODE(struct inode *inode)
+ {
+-	if (sb_any_quota_enabled(inode->i_sb))
+-		inode->i_sb->dq_op->free_inode(inode, 1);
++	if (dqh_any_quota_enabled(inode->i_dqh))
++		inode->i_dqh->dqh_qop->free_inode(inode, 1);
+ }
+ 
+ static __inline__ int DQUOT_TRANSFER(struct inode *inode, struct iattr *iattr)
+ {
+-	if (sb_any_quota_enabled(inode->i_sb) && !IS_NOQUOTA(inode)) {
++	if (dqh_any_quota_enabled(inode->i_dqh) && !IS_NOQUOTA(inode)) {
+ 		DQUOT_INIT(inode);
+-		if (inode->i_sb->dq_op->transfer(inode, iattr) == NO_QUOTA)
++		if (inode->i_dqh->dqh_qop->transfer(inode, iattr) == NO_QUOTA)
+ 			return 1;
+ 	}
+ 	return 0;
+ }
+ 
+ /* The following two functions cannot be called inside a transaction */
+-#define DQUOT_SYNC(sb)	sync_dquots(sb, -1)
++#define DQUOT_SYNC(hash)	sync_dquots(hash, -1)
+ 
+-static __inline__ int DQUOT_OFF(struct super_block *sb)
++static __inline__ int DQUOT_OFF(struct dqhash *hash)
+ {
+ 	int ret = -ENOSYS;
+ 
+-	if (sb_any_quota_enabled(sb) && sb->s_qcop && sb->s_qcop->quota_off)
+-		ret = sb->s_qcop->quota_off(sb, -1);
++	if (dqh_any_quota_enabled(hash) && hash->dqh_qcop &&
++		hash->dqh_qcop->quota_off)
++		ret = hash->dqh_qcop->quota_off(hash, -1);
+ 	return ret;
+ }
+ 
+@@ -196,8 +200,8 @@ static __inline__ int DQUOT_OFF(struct s
+ #define DQUOT_DROP(inode)			do { } while(0)
+ #define DQUOT_ALLOC_INODE(inode)		(0)
+ #define DQUOT_FREE_INODE(inode)			do { } while(0)
+-#define DQUOT_SYNC(sb)				do { } while(0)
+-#define DQUOT_OFF(sb)				do { } while(0)
++#define DQUOT_SYNC(hash)			do { } while(0)
++#define DQUOT_OFF(hash)				do { } while(0)
+ #define DQUOT_TRANSFER(inode, iattr)		(0)
+ static inline int DQUOT_PREALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
+ {
+Index: linux-2.6.20/include/linux/reiserfs_fs.h
+===================================================================
+--- linux-2.6.20.orig/include/linux/reiserfs_fs.h
++++ linux-2.6.20/include/linux/reiserfs_fs.h
+@@ -821,6 +821,10 @@ struct stat_data_v1 {
+ #define REISERFS_COMPR_FL     FS_COMPR_FL
+ #define REISERFS_NOTAIL_FL    FS_NOTAIL_FL
+ 
++/* unfortunately reiserfs sdattr is only 16 bit */
++#define REISERFS_BARRIER_FL   (FS_BARRIER_FL >> 16)
++#define REISERFS_IUNLINK_FL   (FS_IUNLINK_FL >> 16)
++
+ /* persistent flags that file inherits from the parent directory */
+ #define REISERFS_INHERIT_MASK ( REISERFS_IMMUTABLE_FL |	\
+ 				REISERFS_SYNC_FL |	\
+@@ -830,6 +834,9 @@ struct stat_data_v1 {
+ 				REISERFS_COMPR_FL |	\
+ 				REISERFS_NOTAIL_FL )
+ 
++#define REISERFS_FL_USER_VISIBLE	0x80FF
++#define REISERFS_FL_USER_MODIFIABLE	0x80FF
++
+ /* Stat Data on disk (reiserfs version of UFS disk inode minus the
+    address blocks) */
+ struct stat_data {
+@@ -1901,6 +1908,7 @@ static inline void reiserfs_update_sd(st
+ void sd_attrs_to_i_attrs(__u16 sd_attrs, struct inode *inode);
+ void i_attrs_to_sd_attrs(struct inode *inode, __u16 * sd_attrs);
+ int reiserfs_setattr(struct dentry *dentry, struct iattr *attr);
++int reiserfs_sync_flags(struct inode *inode);
+ 
+ /* namei.c */
+ void set_de_name_and_namelen(struct reiserfs_dir_entry *de);
+Index: linux-2.6.20/include/linux/reiserfs_fs_sb.h
+===================================================================
+--- linux-2.6.20.orig/include/linux/reiserfs_fs_sb.h
++++ linux-2.6.20/include/linux/reiserfs_fs_sb.h
+@@ -457,6 +457,7 @@ enum reiserfs_mount_options {
+ 	REISERFS_POSIXACL,
+ 	REISERFS_BARRIER_NONE,
+ 	REISERFS_BARRIER_FLUSH,
++	REISERFS_TAGGED,
+ 
+ 	/* Actions on error */
+ 	REISERFS_ERROR_PANIC,
+Index: linux-2.6.20/include/linux/sched.h
+===================================================================
+--- linux-2.6.20.orig/include/linux/sched.h
++++ linux-2.6.20/include/linux/sched.h
+@@ -26,6 +26,7 @@
+ #define CLONE_STOPPED		0x02000000	/* Start in stopped state */
+ #define CLONE_NEWUTS		0x04000000	/* New utsname group? */
+ #define CLONE_NEWIPC		0x08000000	/* New ipcs */
++#define CLONE_KTHREAD		0x10000000	/* clone a kernel thread */
+ 
+ /*
+  * Scheduling policies
+@@ -54,6 +55,7 @@ struct sched_param {
+ #include <linux/cpumask.h>
+ #include <linux/errno.h>
+ #include <linux/nodemask.h>
++// #include <linux/vs_base.h>
+ 
+ #include <asm/system.h>
+ #include <asm/semaphore.h>
+@@ -93,7 +95,7 @@ struct futex_pi_state;
+  * List of flags we want to share for kernel threads,
+  * if only because they are not used by them anyway.
+  */
+-#define CLONE_KERNEL	(CLONE_FS | CLONE_FILES | CLONE_SIGHAND)
++#define CLONE_KERNEL	(CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_KTHREAD)
+ 
+ /*
+  * These are the constant used to fake the fixed-point load-average
+@@ -145,12 +147,13 @@ extern unsigned long weighted_cpuload(co
+ #define TASK_UNINTERRUPTIBLE	2
+ #define TASK_STOPPED		4
+ #define TASK_TRACED		8
++#define TASK_ONHOLD		16
+ /* in tsk->exit_state */
+-#define EXIT_ZOMBIE		16
+-#define EXIT_DEAD		32
++#define EXIT_ZOMBIE		32
++#define EXIT_DEAD		64
+ /* in tsk->state again */
+-#define TASK_NONINTERACTIVE	64
+-#define TASK_DEAD		128
++#define TASK_NONINTERACTIVE	128
++#define TASK_DEAD		256
+ 
+ #define __set_task_state(tsk, state_value)		\
+ 	do { (tsk)->state = (state_value); } while (0)
+@@ -274,27 +277,30 @@ extern void arch_unmap_area_topdown(stru
+  * The mm counters are not protected by its page_table_lock,
+  * so must be incremented atomically.
+  */
+-#define set_mm_counter(mm, member, value) atomic_long_set(&(mm)->_##member, value)
+-#define get_mm_counter(mm, member) ((unsigned long)atomic_long_read(&(mm)->_##member))
+-#define add_mm_counter(mm, member, value) atomic_long_add(value, &(mm)->_##member)
+-#define inc_mm_counter(mm, member) atomic_long_inc(&(mm)->_##member)
+-#define dec_mm_counter(mm, member) atomic_long_dec(&(mm)->_##member)
+ typedef atomic_long_t mm_counter_t;
++#define __set_mm_counter(mm, member, value) \
++	atomic_long_set(&(mm)->_##member, value)
++#define get_mm_counter(mm, member) \
++	((unsigned long)atomic_long_read(&(mm)->_##member))
+ 
+ #else  /* NR_CPUS < CONFIG_SPLIT_PTLOCK_CPUS */
+ /*
+  * The mm counters are protected by its page_table_lock,
+  * so can be incremented directly.
+  */
+-#define set_mm_counter(mm, member, value) (mm)->_##member = (value)
+-#define get_mm_counter(mm, member) ((mm)->_##member)
+-#define add_mm_counter(mm, member, value) (mm)->_##member += (value)
+-#define inc_mm_counter(mm, member) (mm)->_##member++
+-#define dec_mm_counter(mm, member) (mm)->_##member--
+ typedef unsigned long mm_counter_t;
++#define __set_mm_counter(mm, member, value) (mm)->_##member = (value)
++#define get_mm_counter(mm, member) ((mm)->_##member)
+ 
+ #endif /* NR_CPUS < CONFIG_SPLIT_PTLOCK_CPUS */
+ 
++#define set_mm_counter(mm, member, value) \
++	vx_ ## member ## pages_sub((mm), (get_mm_counter(mm, member) - value))
++#define add_mm_counter(mm, member, value) \
++	vx_ ## member ## pages_add((mm), (value))
++#define inc_mm_counter(mm, member) vx_ ## member ## pages_inc((mm))
++#define dec_mm_counter(mm, member) vx_ ## member ## pages_dec((mm))
++
+ #define get_mm_rss(mm)					\
+ 	(get_mm_counter(mm, file_rss) + get_mm_counter(mm, anon_rss))
+ #define update_hiwater_rss(mm)	do {			\
+@@ -352,6 +358,7 @@ struct mm_struct {
+ 
+ 	/* Architecture-specific MM context */
+ 	mm_context_t context;
++	struct vx_info *mm_vx_info;
+ 
+ 	/* Swap token stuff */
+ 	/*
+@@ -555,9 +562,10 @@ struct user_struct {
+ 	/* Hash table maintenance information */
+ 	struct list_head uidhash_list;
+ 	uid_t uid;
++	xid_t xid;
+ };
+ 
+-extern struct user_struct *find_user(uid_t);
++extern struct user_struct *find_user(xid_t, uid_t);
+ 
+ extern struct user_struct root_user;
+ #define INIT_USER (&root_user)
+@@ -949,6 +957,14 @@ struct task_struct {
+ 	
+ 	void *security;
+ 	struct audit_context *audit_context;
++
++/* vserver context data */
++	struct vx_info *vx_info;
++	struct nx_info *nx_info;
++
++	xid_t xid;
++	nid_t nid;
++
+ 	seccomp_t seccomp;
+ 
+ /* Thread group tracking */
+@@ -1263,12 +1279,16 @@ extern struct task_struct init_task;
+ 
+ extern struct   mm_struct init_mm;
+ 
+-#define find_task_by_pid(nr)	find_task_by_pid_type(PIDTYPE_PID, nr)
++#define find_task_by_real_pid(nr) \
++	find_task_by_pid_type(PIDTYPE_REALPID, nr)
++#define find_task_by_pid(nr) \
++	find_task_by_pid_type(PIDTYPE_PID, nr)
++
+ extern struct task_struct *find_task_by_pid_type(int type, int pid);
+ extern void __set_special_pids(pid_t session, pid_t pgrp);
+ 
+ /* per-UID process charging. */
+-extern struct user_struct * alloc_uid(uid_t);
++extern struct user_struct * alloc_uid(xid_t, uid_t);
+ static inline struct user_struct *get_uid(struct user_struct *u)
+ {
+ 	atomic_inc(&u->__count);
+Index: linux-2.6.20/include/linux/security.h
+===================================================================
+--- linux-2.6.20.orig/include/linux/security.h
++++ linux-2.6.20/include/linux/security.h
+@@ -1164,7 +1164,7 @@ struct security_operations {
+ 	int (*capable) (struct task_struct * tsk, int cap);
+ 	int (*acct) (struct file * file);
+ 	int (*sysctl) (struct ctl_table * table, int op);
+-	int (*quotactl) (int cmds, int type, int id, struct super_block * sb);
++	int (*quotactl) (int cmds, int type, int id, struct dqhash *);
+ 	int (*quota_on) (struct dentry * dentry);
+ 	int (*syslog) (int type);
+ 	int (*settime) (struct timespec *ts, struct timezone *tz);
+@@ -1447,9 +1447,9 @@ static inline int security_sysctl(struct
+ }
+ 
+ static inline int security_quotactl (int cmds, int type, int id,
+-				     struct super_block *sb)
++				     struct dqhash *hash)
+ {
+-	return security_ops->quotactl (cmds, type, id, sb);
++	return security_ops->quotactl (cmds, type, id, hash);
+ }
+ 
+ static inline int security_quota_on (struct dentry * dentry)
+@@ -2192,7 +2192,7 @@ static inline int security_sysctl(struct
+ }
+ 
+ static inline int security_quotactl (int cmds, int type, int id,
+-				     struct super_block * sb)
++				     struct dqhash * hash)
+ {
+ 	return 0;
+ }
+Index: linux-2.6.20/include/linux/shmem_fs.h
+===================================================================
+--- linux-2.6.20.orig/include/linux/shmem_fs.h
++++ linux-2.6.20/include/linux/shmem_fs.h
+@@ -8,6 +8,9 @@
+ 
+ #define SHMEM_NR_DIRECT 16
+ 
++#define TMPFS_SUPER_MAGIC	0x01021994
++
++
+ struct shmem_inode_info {
+ 	spinlock_t		lock;
+ 	unsigned long		flags;
+Index: linux-2.6.20/include/linux/stat.h
+===================================================================
+--- linux-2.6.20.orig/include/linux/stat.h
++++ linux-2.6.20/include/linux/stat.h
+@@ -63,6 +63,7 @@ struct kstat {
+ 	unsigned int	nlink;
+ 	uid_t		uid;
+ 	gid_t		gid;
++	tag_t		tag;
+ 	dev_t		rdev;
+ 	loff_t		size;
+ 	struct timespec  atime;
+Index: linux-2.6.20/include/linux/sunrpc/auth.h
+===================================================================
+--- linux-2.6.20.orig/include/linux/sunrpc/auth.h
++++ linux-2.6.20/include/linux/sunrpc/auth.h
+@@ -24,6 +24,7 @@
+ struct auth_cred {
+ 	uid_t	uid;
+ 	gid_t	gid;
++	tag_t	tag;
+ 	struct group_info *group_info;
+ };
+ 
+Index: linux-2.6.20/include/linux/sunrpc/clnt.h
+===================================================================
+--- linux-2.6.20.orig/include/linux/sunrpc/clnt.h
++++ linux-2.6.20/include/linux/sunrpc/clnt.h
+@@ -42,7 +42,8 @@ struct rpc_clnt {
+ 				cl_intr     : 1,/* interruptible */
+ 				cl_autobind : 1,/* use getport() */
+ 				cl_oneshot  : 1,/* dispose after use */
+-				cl_dead     : 1;/* abandoned */
++				cl_dead     : 1,/* abandoned */
++				cl_tag      : 1;/* context tagging */
+ 
+ 	struct rpc_rtt *	cl_rtt;		/* RTO estimator data */
+ 
+Index: linux-2.6.20/include/linux/syscalls.h
+===================================================================
+--- linux-2.6.20.orig/include/linux/syscalls.h
++++ linux-2.6.20/include/linux/syscalls.h
+@@ -294,6 +294,8 @@ asmlinkage long sys_symlink(const char _
+ asmlinkage long sys_unlink(const char __user *pathname);
+ asmlinkage long sys_rename(const char __user *oldname,
+ 				const char __user *newname);
++asmlinkage long sys_copyfile(const char __user *from, const char __user *to,
++				umode_t mode);
+ asmlinkage long sys_chmod(const char __user *filename, mode_t mode);
+ asmlinkage long sys_fchmod(unsigned int fd, mode_t mode);
+ 
+Index: linux-2.6.20/include/linux/sysctl.h
+===================================================================
+--- linux-2.6.20.orig/include/linux/sysctl.h
++++ linux-2.6.20/include/linux/sysctl.h
+@@ -101,6 +101,7 @@ enum
+ 	KERN_CAP_BSET=14,	/* int: capability bounding set */
+ 	KERN_PANIC=15,		/* int: panic timeout */
+ 	KERN_REALROOTDEV=16,	/* real root device to mount after initrd */
++	KERN_VSHELPER=17,	/* string: path to vshelper policy agent */
+ 
+ 	KERN_SPARC_REBOOT=21,	/* reboot command on Sparc */
+ 	KERN_CTLALTDEL=22,	/* int: allow ctl-alt-del to reboot */
+@@ -938,6 +939,9 @@ typedef int ctl_handler (ctl_table *tabl
+ typedef int proc_handler (ctl_table *ctl, int write, struct file * filp,
+ 			  void __user *buffer, size_t *lenp, loff_t *ppos);
+ 
++typedef int virt_handler (struct ctl_table *ctl, int write, xid_t xid,
++			  void **datap, size_t *lenp);
++
+ extern int proc_dostring(ctl_table *, int, struct file *,
+ 			 void __user *, size_t *, loff_t *);
+ extern int proc_dointvec(ctl_table *, int, struct file *,
+@@ -1022,6 +1026,7 @@ struct ctl_table 
+ 	mode_t mode;
+ 	ctl_table *child;
+ 	proc_handler *proc_handler;	/* Callback for text formatting */
++	virt_handler *virt_handler;	/* Context virtualization */
+ 	ctl_handler *strategy;		/* Callback function for all r/w */
+ 	struct proc_dir_entry *de;	/* /proc control block */
+ 	void *extra1;
+Index: linux-2.6.20/include/linux/sysfs.h
+===================================================================
+--- linux-2.6.20.orig/include/linux/sysfs.h
++++ linux-2.6.20/include/linux/sysfs.h
+@@ -13,6 +13,8 @@
+ #include <linux/compiler.h>
+ #include <asm/atomic.h>
+ 
++#define SYSFS_SUPER_MAGIC	0x62656572
++
+ struct kobject;
+ struct module;
+ 
+Index: linux-2.6.20/include/linux/time.h
+===================================================================
+--- linux-2.6.20.orig/include/linux/time.h
++++ linux-2.6.20/include/linux/time.h
+@@ -174,6 +174,9 @@ static inline void timespec_add_ns(struc
+ 	}
+ 	a->tv_nsec = ns;
+ }
++
++#include <linux/vs_time.h>
++
+ #endif /* __KERNEL__ */
+ 
+ #define NFDBITS			__NFDBITS
+Index: linux-2.6.20/include/linux/types.h
+===================================================================
+--- linux-2.6.20.orig/include/linux/types.h
++++ linux-2.6.20/include/linux/types.h
+@@ -39,6 +39,9 @@ typedef __kernel_uid32_t	uid_t;
+ typedef __kernel_gid32_t	gid_t;
+ typedef __kernel_uid16_t        uid16_t;
+ typedef __kernel_gid16_t        gid16_t;
++typedef unsigned int		xid_t;
++typedef unsigned int		nid_t;
++typedef unsigned int		tag_t;
+ 
+ #ifdef CONFIG_UID16
+ /* This is defined by include/asm-{arch}/posix_types.h */
+Index: linux-2.6.20/include/linux/vroot.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vroot.h
+@@ -0,0 +1,51 @@
++
++/*
++ * include/linux/vroot.h
++ *
++ * written by Herbert Pötzl, 9/11/2002
++ * ported to 2.6 by Herbert Pötzl, 30/12/2004
++ *
++ * Copyright (C) 2002-2005 by Herbert Pötzl.
++ * Redistribution of this file is permitted under the
++ * GNU General Public License.
++ */
++
++#ifndef _LINUX_VROOT_H
++#define _LINUX_VROOT_H
++
++
++#ifdef __KERNEL__
++
++/* Possible states of device */
++enum {
++	Vr_unbound,
++	Vr_bound,
++};
++
++struct vroot_device {
++	int		vr_number;
++	int		vr_refcnt;
++
++	struct semaphore	vr_ctl_mutex;
++	struct block_device    *vr_device;
++	int			vr_state;
++};
++
++
++typedef struct block_device *(vroot_grb_func)(struct block_device *);
++
++extern int register_vroot_grb(vroot_grb_func *);
++extern int unregister_vroot_grb(vroot_grb_func *);
++
++#endif /* __KERNEL__ */
++
++#define MAX_VROOT_DEFAULT	8
++
++/*
++ * IOCTL commands --- we will commandeer 0x56 ('V')
++ */
++
++#define VROOT_SET_DEV		0x5600
++#define VROOT_CLR_DEV		0x5601
++
++#endif /* _LINUX_VROOT_H */
+Index: linux-2.6.20/include/linux/vs_base.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vs_base.h
+@@ -0,0 +1,9 @@
++#ifndef _VS_BASE_H
++#define _VS_BASE_H
++
++#include "vserver/base.h"
++#include "vserver/debug.h"
++
++#else
++#warning duplicate inclusion
++#endif
+Index: linux-2.6.20/include/linux/vs_context.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vs_context.h
+@@ -0,0 +1,220 @@
++#ifndef _VS_CONTEXT_H
++#define _VS_CONTEXT_H
++
++#include "vserver/base.h"
++#include "vserver/context.h"
++#include "vserver/history.h"
++#include "vserver/debug.h"
++
++
++#define get_vx_info(i)	__get_vx_info(i,__FILE__,__LINE__,__HERE__)
++
++static inline struct vx_info *__get_vx_info(struct vx_info *vxi,
++	const char *_file, int _line, void *_here)
++{
++	if (!vxi)
++		return NULL;
++
++	vxlprintk(VXD_CBIT(xid, 2), "get_vx_info(%p[#%d.%d])",
++		vxi, vxi?vxi->vx_id:0, vxi?atomic_read(&vxi->vx_usecnt):0,
++		_file, _line);
++	__vxh_get_vx_info(vxi, _here);
++
++	atomic_inc(&vxi->vx_usecnt);
++	return vxi;
++}
++
++
++extern void free_vx_info(struct vx_info *);
++
++#define put_vx_info(i)	__put_vx_info(i,__FILE__,__LINE__,__HERE__)
++
++static inline void __put_vx_info(struct vx_info *vxi,
++	const char *_file, int _line, void *_here)
++{
++	if (!vxi)
++		return;
++
++	vxlprintk(VXD_CBIT(xid, 2), "put_vx_info(%p[#%d.%d])",
++		vxi, vxi?vxi->vx_id:0, vxi?atomic_read(&vxi->vx_usecnt):0,
++		_file, _line);
++	__vxh_put_vx_info(vxi, _here);
++
++	if (atomic_dec_and_test(&vxi->vx_usecnt))
++		free_vx_info(vxi);
++}
++
++
++#define init_vx_info(p,i) __init_vx_info(p,i,__FILE__,__LINE__,__HERE__)
++
++static inline void __init_vx_info(struct vx_info **vxp, struct vx_info *vxi,
++	const char *_file, int _line, void *_here)
++{
++	if (vxi) {
++		vxlprintk(VXD_CBIT(xid, 3),
++			"init_vx_info(%p[#%d.%d])",
++			vxi, vxi?vxi->vx_id:0,
++			vxi?atomic_read(&vxi->vx_usecnt):0,
++			_file, _line);
++		__vxh_init_vx_info(vxi, vxp, _here);
++
++		atomic_inc(&vxi->vx_usecnt);
++	}
++	*vxp = vxi;
++}
++
++
++#define set_vx_info(p,i) __set_vx_info(p,i,__FILE__,__LINE__,__HERE__)
++
++static inline void __set_vx_info(struct vx_info **vxp, struct vx_info *vxi,
++	const char *_file, int _line, void *_here)
++{
++	struct vx_info *vxo;
++
++	if (!vxi)
++		return;
++
++	vxlprintk(VXD_CBIT(xid, 3), "set_vx_info(%p[#%d.%d])",
++		vxi, vxi?vxi->vx_id:0,
++		vxi?atomic_read(&vxi->vx_usecnt):0,
++		_file, _line);
++	__vxh_set_vx_info(vxi, vxp, _here);
++
++	atomic_inc(&vxi->vx_usecnt);
++	vxo = xchg(vxp, vxi);
++	BUG_ON(vxo);
++}
++
++
++#define clr_vx_info(p) __clr_vx_info(p,__FILE__,__LINE__,__HERE__)
++
++static inline void __clr_vx_info(struct vx_info **vxp,
++	const char *_file, int _line, void *_here)
++{
++	struct vx_info *vxo;
++
++	vxo = xchg(vxp, NULL);
++	if (!vxo)
++		return;
++
++	vxlprintk(VXD_CBIT(xid, 3), "clr_vx_info(%p[#%d.%d])",
++		vxo, vxo?vxo->vx_id:0,
++		vxo?atomic_read(&vxo->vx_usecnt):0,
++		_file, _line);
++	__vxh_clr_vx_info(vxo, vxp, _here);
++
++	if (atomic_dec_and_test(&vxo->vx_usecnt))
++		free_vx_info(vxo);
++}
++
++
++#define claim_vx_info(v,p) \
++	__claim_vx_info(v,p,__FILE__,__LINE__,__HERE__)
++
++static inline void __claim_vx_info(struct vx_info *vxi,
++	struct task_struct *task,
++	const char *_file, int _line, void *_here)
++{
++	vxlprintk(VXD_CBIT(xid, 3), "claim_vx_info(%p[#%d.%d.%d]) %p",
++		vxi, vxi?vxi->vx_id:0,
++		vxi?atomic_read(&vxi->vx_usecnt):0,
++		vxi?atomic_read(&vxi->vx_tasks):0,
++		task, _file, _line);
++	__vxh_claim_vx_info(vxi, task, _here);
++
++	atomic_inc(&vxi->vx_tasks);
++}
++
++
++extern void unhash_vx_info(struct vx_info *);
++
++#define release_vx_info(v,p) \
++	__release_vx_info(v,p,__FILE__,__LINE__,__HERE__)
++
++static inline void __release_vx_info(struct vx_info *vxi,
++	struct task_struct *task,
++	const char *_file, int _line, void *_here)
++{
++	vxlprintk(VXD_CBIT(xid, 3), "release_vx_info(%p[#%d.%d.%d]) %p",
++		vxi, vxi?vxi->vx_id:0,
++		vxi?atomic_read(&vxi->vx_usecnt):0,
++		vxi?atomic_read(&vxi->vx_tasks):0,
++		task, _file, _line);
++	__vxh_release_vx_info(vxi, task, _here);
++
++	might_sleep();
++
++	if (atomic_dec_and_test(&vxi->vx_tasks))
++		unhash_vx_info(vxi);
++}
++
++
++#define task_get_vx_info(p) \
++	__task_get_vx_info(p,__FILE__,__LINE__,__HERE__)
++
++static inline struct vx_info *__task_get_vx_info(struct task_struct *p,
++	const char *_file, int _line, void *_here)
++{
++	struct vx_info *vxi;
++
++	task_lock(p);
++	vxlprintk(VXD_CBIT(xid, 5), "task_get_vx_info(%p)",
++		p, _file, _line);
++	vxi = __get_vx_info(p->vx_info, _file, _line, _here);
++	task_unlock(p);
++	return vxi;
++}
++
++
++static inline void __wakeup_vx_info(struct vx_info *vxi)
++{
++	if (waitqueue_active(&vxi->vx_wait))
++		wake_up_interruptible(&vxi->vx_wait);
++}
++
++
++#define enter_vx_info(v,s)	__enter_vx_info(v,s,__FILE__,__LINE__)
++
++static inline void __enter_vx_info(struct vx_info *vxi,
++	struct vx_info_save *vxis, const char *_file, int _line)
++{
++	vxlprintk(VXD_CBIT(xid, 5), "enter_vx_info(%p[#%d],%p) %p[#%d,%p]",
++		vxi, vxi ? vxi->vx_id : 0, vxis, current,
++		current->xid, current->vx_info, _file, _line);
++	vxis->vxi = xchg(&current->vx_info, vxi);
++	vxis->xid = current->xid;
++	current->xid = vxi ? vxi->vx_id : 0;
++}
++
++#define leave_vx_info(s)	__leave_vx_info(s,__FILE__,__LINE__)
++
++static inline void __leave_vx_info(struct vx_info_save *vxis,
++	const char *_file, int _line)
++{
++	vxlprintk(VXD_CBIT(xid, 5), "leave_vx_info(%p[#%d,%p]) %p[#%d,%p]",
++		vxis, vxis->xid, vxis->vxi, current,
++		current->xid, current->vx_info, _file, _line);
++	(void)xchg(&current->vx_info, vxis->vxi);
++	current->xid = vxis->xid;
++}
++
++
++static inline void __enter_vx_admin(struct vx_info_save *vxis)
++{
++	vxis->vxi = xchg(&current->vx_info, NULL);
++	vxis->xid = xchg(&current->xid, (xid_t)0);
++}
++
++static inline void __leave_vx_admin(struct vx_info_save *vxis)
++{
++	(void)xchg(&current->xid, vxis->xid);
++	(void)xchg(&current->vx_info, vxis->vxi);
++}
++
++extern void exit_vx_info(struct task_struct *, int);
++extern void exit_vx_info_early(struct task_struct *, int);
++
++
++#else
++#warning duplicate inclusion
++#endif
+Index: linux-2.6.20/include/linux/vs_cowbl.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vs_cowbl.h
+@@ -0,0 +1,44 @@
++#ifndef _VS_COWBL_H
++#define _VS_COWBL_H
++
++#include <linux/fs.h>
++#include <linux/dcache.h>
++#include <linux/namei.h>
++
++extern struct dentry *cow_break_link(const char *pathname);
++
++static inline int cow_check_and_break(struct nameidata *nd)
++{
++	struct inode *inode = nd->dentry->d_inode;
++	int error = 0;
++	if (IS_RDONLY(inode) || MNT_IS_RDONLY(nd->mnt))
++		return -EROFS;
++	if (IS_COW(inode)) {
++		if (IS_COW_LINK(inode)) {
++			struct dentry *new_dentry, *old_dentry = nd->dentry;
++			char *path, *buf;
++
++			buf = kmalloc(PATH_MAX, GFP_KERNEL);
++			if (!buf) {
++				return -ENOMEM;
++			}
++			path = d_path(nd->dentry, nd->mnt, buf, PATH_MAX);
++			new_dentry = cow_break_link(path);
++			kfree(buf);
++			if (!IS_ERR(new_dentry)) {
++				nd->dentry = new_dentry;
++				dput(old_dentry);
++			} else
++				error = PTR_ERR(new_dentry);
++		} else {
++			inode->i_flags &= ~(S_IUNLINK|S_IMMUTABLE);
++			inode->i_ctime = CURRENT_TIME;
++			mark_inode_dirty(inode);
++		}
++	}
++	return error;
++}
++
++#else
++#warning duplicate inclusion
++#endif
+Index: linux-2.6.20/include/linux/vs_cvirt.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vs_cvirt.h
+@@ -0,0 +1,49 @@
++#ifndef _VS_CVIRT_H
++#define _VS_CVIRT_H
++
++#include "vserver/cvirt.h"
++#include "vserver/context.h"
++#include "vserver/base.h"
++#include "vserver/debug.h"
++
++
++static inline void vx_activate_task(struct task_struct *p)
++{
++	struct vx_info *vxi;
++
++	if ((vxi = p->vx_info)) {
++		vx_update_load(vxi);
++		atomic_inc(&vxi->cvirt.nr_running);
++	}
++}
++
++static inline void vx_deactivate_task(struct task_struct *p)
++{
++	struct vx_info *vxi;
++
++	if ((vxi = p->vx_info)) {
++		vx_update_load(vxi);
++		atomic_dec(&vxi->cvirt.nr_running);
++	}
++}
++
++static inline void vx_uninterruptible_inc(struct task_struct *p)
++{
++	struct vx_info *vxi;
++
++	if ((vxi = p->vx_info))
++		atomic_inc(&vxi->cvirt.nr_uninterruptible);
++}
++
++static inline void vx_uninterruptible_dec(struct task_struct *p)
++{
++	struct vx_info *vxi;
++
++	if ((vxi = p->vx_info))
++		atomic_dec(&vxi->cvirt.nr_uninterruptible);
++}
++
++
++#else
++#warning duplicate inclusion
++#endif
+Index: linux-2.6.20/include/linux/vs_dlimit.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vs_dlimit.h
+@@ -0,0 +1,214 @@
++#ifndef _VS_DLIMIT_H
++#define _VS_DLIMIT_H
++
++#include "vserver/dlimit.h"
++#include "vserver/base.h"
++#include "vserver/debug.h"
++
++
++#define get_dl_info(i)	__get_dl_info(i,__FILE__,__LINE__)
++
++static inline struct dl_info *__get_dl_info(struct dl_info *dli,
++	const char *_file, int _line)
++{
++	if (!dli)
++		return NULL;
++	vxlprintk(VXD_CBIT(dlim, 4), "get_dl_info(%p[#%d.%d])",
++		dli, dli?dli->dl_tag:0, dli?atomic_read(&dli->dl_usecnt):0,
++		_file, _line);
++	atomic_inc(&dli->dl_usecnt);
++	return dli;
++}
++
++
++#define free_dl_info(i) \
++	call_rcu(&i->dl_rcu, rcu_free_dl_info);
++
++#define put_dl_info(i)	__put_dl_info(i,__FILE__,__LINE__)
++
++static inline void __put_dl_info(struct dl_info *dli,
++	const char *_file, int _line)
++{
++	if (!dli)
++		return;
++	vxlprintk(VXD_CBIT(dlim, 4), "put_dl_info(%p[#%d.%d])",
++		dli, dli?dli->dl_tag:0, dli?atomic_read(&dli->dl_usecnt):0,
++		_file, _line);
++	if (atomic_dec_and_test(&dli->dl_usecnt))
++		free_dl_info(dli);
++}
++
++
++#define __dlimit_char(d)	((d)?'*':' ')
++
++static inline int __dl_alloc_space(struct super_block *sb,
++	tag_t tag, dlsize_t nr, const char *file, int line)
++{
++	struct dl_info *dli = NULL;
++	int ret = 0;
++
++	if (nr == 0)
++		goto out;
++	dli = locate_dl_info(sb, tag);
++	if (!dli)
++		goto out;
++
++	spin_lock(&dli->dl_lock);
++	ret = (dli->dl_space_used + nr > dli->dl_space_total);
++	if (!ret)
++		dli->dl_space_used += nr;
++	spin_unlock(&dli->dl_lock);
++	put_dl_info(dli);
++out:
++	vxlprintk(VXD_CBIT(dlim, 1),
++		"ALLOC (%p,#%d)%c %lld bytes (%d)",
++		sb, tag, __dlimit_char(dli), (long long)nr,
++		ret, file, line);
++	return ret;
++}
++
++static inline void __dl_free_space(struct super_block *sb,
++	tag_t tag, dlsize_t nr, const char *_file, int _line)
++{
++	struct dl_info *dli = NULL;
++
++	if (nr == 0)
++		goto out;
++	dli = locate_dl_info(sb, tag);
++	if (!dli)
++		goto out;
++
++	spin_lock(&dli->dl_lock);
++	if (dli->dl_space_used > nr)
++		dli->dl_space_used -= nr;
++	else
++		dli->dl_space_used = 0;
++	spin_unlock(&dli->dl_lock);
++	put_dl_info(dli);
++out:
++	vxlprintk(VXD_CBIT(dlim, 1),
++		"FREE  (%p,#%d)%c %lld bytes",
++		sb, tag, __dlimit_char(dli), (long long)nr,
++		_file, _line);
++}
++
++static inline int __dl_alloc_inode(struct super_block *sb,
++	tag_t tag, const char *_file, int _line)
++{
++	struct dl_info *dli;
++	int ret = 0;
++
++	dli = locate_dl_info(sb, tag);
++	if (!dli)
++		goto out;
++
++	spin_lock(&dli->dl_lock);
++	ret = (dli->dl_inodes_used >= dli->dl_inodes_total);
++	if (!ret)
++		dli->dl_inodes_used++;
++#if 0
++	else
++		vxwprintk("DLIMIT hit (%p,#%d), inode %d>=%d @ %s:%d",
++			sb, tag,
++			dli->dl_inodes_used, dli->dl_inodes_total,
++			file, line);
++#endif
++	spin_unlock(&dli->dl_lock);
++	put_dl_info(dli);
++out:
++	vxlprintk(VXD_CBIT(dlim, 0),
++		"ALLOC (%p,#%d)%c inode (%d)",
++		sb, tag, __dlimit_char(dli), ret, _file, _line);
++	return ret;
++}
++
++static inline void __dl_free_inode(struct super_block *sb,
++	tag_t tag, const char *_file, int _line)
++{
++	struct dl_info *dli;
++
++	dli = locate_dl_info(sb, tag);
++	if (!dli)
++		goto out;
++
++	spin_lock(&dli->dl_lock);
++	if (dli->dl_inodes_used > 1)
++		dli->dl_inodes_used--;
++	else
++		dli->dl_inodes_used = 0;
++	spin_unlock(&dli->dl_lock);
++	put_dl_info(dli);
++out:
++	vxlprintk(VXD_CBIT(dlim, 0),
++		"FREE  (%p,#%d)%c inode",
++		sb, tag, __dlimit_char(dli), _file, _line);
++}
++
++static inline void __dl_adjust_block(struct super_block *sb, tag_t tag,
++	unsigned long long *free_blocks, unsigned long long *root_blocks,
++	const char *_file, int _line)
++{
++	struct dl_info *dli;
++	uint64_t broot, bfree;
++
++	dli = locate_dl_info(sb, tag);
++	if (!dli)
++		return;
++
++	spin_lock(&dli->dl_lock);
++	broot = (dli->dl_space_total -
++		(dli->dl_space_total >> 10) * dli->dl_nrlmult)
++		>> sb->s_blocksize_bits;
++	bfree = (dli->dl_space_total - dli->dl_space_used)
++			>> sb->s_blocksize_bits;
++	spin_unlock(&dli->dl_lock);
++
++	vxlprintk(VXD_CBIT(dlim, 2),
++		"ADJUST: %lld,%lld on %lld,%lld [mult=%d]",
++		(long long)bfree, (long long)broot,
++		*free_blocks, *root_blocks, dli->dl_nrlmult,
++		_file, _line);
++	if (free_blocks) {
++		if (*free_blocks > bfree)
++			*free_blocks = bfree;
++	}
++	if (root_blocks) {
++		if (*root_blocks > broot)
++			*root_blocks = broot;
++	}
++	put_dl_info(dli);
++}
++
++#define DLIMIT_ALLOC_SPACE(in, bytes) \
++	__dl_alloc_space((in)->i_sb, (in)->i_tag, (dlsize_t)(bytes), \
++		__FILE__, __LINE__ )
++
++#define DLIMIT_FREE_SPACE(in, bytes) \
++	__dl_free_space((in)->i_sb, (in)->i_tag, (dlsize_t)(bytes), \
++		__FILE__, __LINE__ )
++
++#define DLIMIT_ALLOC_BLOCK(in, nr) \
++	__dl_alloc_space((in)->i_sb, (in)->i_tag, \
++		((dlsize_t)(nr)) << (in)->i_sb->s_blocksize_bits, \
++		__FILE__, __LINE__ )
++
++#define DLIMIT_FREE_BLOCK(in, nr) \
++	__dl_free_space((in)->i_sb, (in)->i_tag, \
++		((dlsize_t)(nr)) << (in)->i_sb->s_blocksize_bits, \
++		__FILE__, __LINE__ )
++
++
++#define DLIMIT_ALLOC_INODE(in) \
++	__dl_alloc_inode((in)->i_sb, (in)->i_tag, __FILE__, __LINE__ )
++
++#define DLIMIT_FREE_INODE(in) \
++	__dl_free_inode((in)->i_sb, (in)->i_tag, __FILE__, __LINE__ )
++
++
++#define DLIMIT_ADJUST_BLOCK(sb, tag, fb, rb) \
++	__dl_adjust_block(sb, tag, fb, rb, __FILE__, __LINE__ )
++
++
++#else
++#warning duplicate inclusion
++#endif
+Index: linux-2.6.20/include/linux/vs_inet.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vs_inet.h
+@@ -0,0 +1,155 @@
++#ifndef _VS_INET_H
++#define _VS_INET_H
++
++#include <linux/vs_network.h>
++
++#define IPI_LOOPBACK	htonl(INADDR_LOOPBACK)
++
++
++static inline int addr_in_nx_info(struct nx_info *nxi, uint32_t addr)
++{
++	int n,i;
++
++	if (!nxi)
++		return 1;
++
++	n = nxi->nbipv4;
++	if (n && (nxi->ipv4[0] == 0))
++		return 1;
++	for (i=0; i<n; i++) {
++		if (nxi->ipv4[i] == addr)
++			return 1;
++	}
++	return 0;
++}
++
++
++/*
++ *	Check if a given address matches for a socket
++ *
++ *	nxi:		the socket's nx_info if any
++ *	addr:		to be verified address
++ *	saddr/baddr:	socket addresses
++ */
++static inline int raw_addr_match (
++	struct nx_info *nxi,
++	uint32_t addr,
++	uint32_t saddr,
++	uint32_t baddr)
++{
++	if (addr && (saddr == addr || baddr == addr))
++		return 1;
++	if (!saddr)
++		return addr_in_nx_info(nxi, addr);
++	return 0;
++}
++
++
++/* inet related checks and helpers */
++
++
++struct in_ifaddr;
++struct net_device;
++struct sock;
++
++#ifdef CONFIG_INET
++
++#include <linux/netdevice.h>
++#include <linux/inetdevice.h>
++#include <net/inet_timewait_sock.h>
++
++
++int dev_in_nx_info(struct net_device *, struct nx_info *);
++int nx_addr_conflict(struct nx_info *, uint32_t, const struct sock *);
++
++
++/*
++ *	check if address is covered by socket
++ *
++ *	sk:	the socket to check against
++ *	addr:	the address in question (must be != 0)
++ */
++
++static inline
++int __addr_in_socket(const struct sock *sk, uint32_t addr)
++{
++	struct nx_info *nxi = sk->sk_nx_info;
++	uint32_t saddr = inet_rcv_saddr(sk);
++
++	vxdprintk(VXD_CBIT(net, 5),
++		"__addr_in_socket(%p,%d.%d.%d.%d) %p:%d.%d.%d.%d %p;%lx",
++		sk, VXD_QUAD(addr), nxi, VXD_QUAD(saddr), sk->sk_socket,
++		(sk->sk_socket?sk->sk_socket->flags:0));
++
++	if (saddr) {
++		/* direct address match */
++		return (saddr == addr);
++	} else if (nxi) {
++		/* match against nx_info */
++		return addr_in_nx_info(nxi, addr);
++	} else {
++		/* unrestricted any socket */
++		return 1;
++	}
++}
++
++
++
++static inline
++int nx_dev_visible(struct nx_info *nxi, struct net_device *dev)
++{
++	if (!nx_info_flags(nxi, NXF_HIDE_NETIF, 0))
++		return 1;
++	if (dev_in_nx_info(dev, nxi))
++		return 1;
++	return 0;
++}
++
++
++static inline
++int ifa_in_nx_info(struct in_ifaddr *ifa, struct nx_info *nxi)
++{
++	if (!nxi)
++		return 1;
++	if (!ifa)
++		return 0;
++	return addr_in_nx_info(nxi, ifa->ifa_local);
++}
++
++static inline
++int nx_ifa_visible(struct nx_info *nxi, struct in_ifaddr *ifa)
++{
++	if (!nx_info_flags(nxi, NXF_HIDE_NETIF, 0))
++		return 1;
++	if (ifa_in_nx_info(ifa, nxi))
++		return 1;
++	return 0;
++}
++
++#else /* CONFIG_INET */
++
++static inline
++int nx_dev_visible(struct nx_info *n, struct net_device *d)
++{
++	return 1;
++}
++
++
++static inline
++int nx_addr_conflict(struct nx_info *n, uint32_t a, const struct sock *s)
++{
++	return 1;
++}
++
++static inline
++int ifa_in_nx_info(struct in_ifaddr *a, struct nx_info *n)
++{
++	return 1;
++}
++
++#endif /* CONFIG_INET */
++
++
++#else
++#warning duplicate inclusion
++#endif
+Index: linux-2.6.20/include/linux/vs_limit.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vs_limit.h
+@@ -0,0 +1,140 @@
++#ifndef _VS_LIMIT_H
++#define _VS_LIMIT_H
++
++#include "vserver/limit.h"
++#include "vserver/base.h"
++#include "vserver/context.h"
++#include "vserver/debug.h"
++#include "vserver/context.h"
++#include "vserver/limit_int.h"
++
++
++#define vx_acc_cres(v,d,p,r) \
++	__vx_acc_cres(v, r, d, p, __FILE__, __LINE__)
++
++#define vx_acc_cres_cond(x,d,p,r) \
++	__vx_acc_cres(((x) == vx_current_xid()) ? current->vx_info : 0, \
++	r, d, p, __FILE__, __LINE__)
++
++
++#define vx_add_cres(v,a,p,r) \
++	__vx_add_cres(v, r, a, p, __FILE__, __LINE__)
++#define vx_sub_cres(v,a,p,r)		vx_add_cres(v,-(a),p,r)
++
++#define vx_add_cres_cond(x,a,p,r) \
++	__vx_add_cres(((x) == vx_current_xid()) ? current->vx_info : 0, \
++	r, a, p, __FILE__, __LINE__)
++#define vx_sub_cres_cond(x,a,p,r)	vx_add_cres_cond(x,-(a),p,r)
++
++
++/* process and file limits */
++
++#define vx_nproc_inc(p) \
++	vx_acc_cres((p)->vx_info, 1, p, RLIMIT_NPROC)
++
++#define vx_nproc_dec(p) \
++	vx_acc_cres((p)->vx_info,-1, p, RLIMIT_NPROC)
++
++#define vx_files_inc(f) \
++	vx_acc_cres_cond((f)->f_xid, 1, f, RLIMIT_NOFILE)
++
++#define vx_files_dec(f) \
++	vx_acc_cres_cond((f)->f_xid,-1, f, RLIMIT_NOFILE)
++
++#define vx_locks_inc(l) \
++	vx_acc_cres_cond((l)->fl_xid, 1, l, RLIMIT_LOCKS)
++
++#define vx_locks_dec(l) \
++	vx_acc_cres_cond((l)->fl_xid,-1, l, RLIMIT_LOCKS)
++
++#define vx_openfd_inc(f) \
++	vx_acc_cres(current->vx_info, 1, (void *)(long)(f), VLIMIT_OPENFD)
++
++#define vx_openfd_dec(f) \
++	vx_acc_cres(current->vx_info,-1, (void *)(long)(f), VLIMIT_OPENFD)
++
++
++#define vx_cres_avail(v,n,r) \
++	__vx_cres_avail(v, r, n, __FILE__, __LINE__)
++
++
++#define vx_nproc_avail(n) \
++	vx_cres_avail(current->vx_info, n, RLIMIT_NPROC)
++
++#define vx_files_avail(n) \
++	vx_cres_avail(current->vx_info, n, RLIMIT_NOFILE)
++
++#define vx_locks_avail(n) \
++	vx_cres_avail(current->vx_info, n, RLIMIT_LOCKS)
++
++#define vx_openfd_avail(n) \
++	vx_cres_avail(current->vx_info, n, VLIMIT_OPENFD)
++
++
++/* dentry limits */
++
++#define vx_dentry_inc(d) do {						\
++	if (atomic_read(&d->d_count) == 1)				\
++		vx_acc_cres(current->vx_info, 1, d, VLIMIT_DENTRY);	\
++	} while (0)
++
++#define vx_dentry_dec(d) do {						\
++	if (atomic_read(&d->d_count) == 0)				\
++		vx_acc_cres(current->vx_info,-1, d, VLIMIT_DENTRY);	\
++	} while (0)
++
++#define vx_dentry_avail(n) \
++	vx_cres_avail(current->vx_info, n, VLIMIT_DENTRY)
++
++
++/* socket limits */
++
++#define vx_sock_inc(s) \
++	vx_acc_cres((s)->sk_vx_info, 1, s, VLIMIT_NSOCK)
++
++#define vx_sock_dec(s) \
++	vx_acc_cres((s)->sk_vx_info,-1, s, VLIMIT_NSOCK)
++
++#define vx_sock_avail(n) \
++	vx_cres_avail(current->vx_info, n, VLIMIT_NSOCK)
++
++
++/* ipc resource limits */
++
++#define vx_ipcmsg_add(v,u,a) \
++	vx_add_cres(v, a, u, RLIMIT_MSGQUEUE)
++
++#define vx_ipcmsg_sub(v,u,a) \
++	vx_sub_cres(v, a, u, RLIMIT_MSGQUEUE)
++
++#define vx_ipcmsg_avail(v,a) \
++	vx_cres_avail(v, a, RLIMIT_MSGQUEUE)
++
++
++#define vx_ipcshm_add(v,k,a) \
++	vx_add_cres(v, a, (void *)(long)(k), VLIMIT_SHMEM)
++
++#define vx_ipcshm_sub(v,k,a) \
++	vx_sub_cres(v, a, (void *)(long)(k), VLIMIT_SHMEM)
++
++#define vx_ipcshm_avail(v,a) \
++	vx_cres_avail(v, a, VLIMIT_SHMEM)
++
++
++#define vx_semary_inc(a) \
++	vx_acc_cres(current->vx_info, 1, a, VLIMIT_SEMARY)
++
++#define vx_semary_dec(a) \
++	vx_acc_cres(current->vx_info,-1, a, VLIMIT_SEMARY)
++
++
++#define vx_nsems_add(a,n) \
++	vx_add_cres(current->vx_info, n, a, VLIMIT_NSEMS)
++
++#define vx_nsems_sub(a,n) \
++	vx_sub_cres(current->vx_info, n, a, VLIMIT_NSEMS)
++
++
++#else
++#warning duplicate inclusion
++#endif
+Index: linux-2.6.20/include/linux/vs_memory.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vs_memory.h
+@@ -0,0 +1,159 @@
++#ifndef _VS_MEMORY_H
++#define _VS_MEMORY_H
++
++#include "vserver/limit.h"
++#include "vserver/base.h"
++#include "vserver/context.h"
++#include "vserver/debug.h"
++#include "vserver/context.h"
++#include "vserver/limit_int.h"
++
++
++#define __acc_add_long(a,v)	(*(v) += (a))
++#define __acc_inc_long(v)	(++*(v))
++#define __acc_dec_long(v)	(--*(v))
++
++#if	NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS
++#define __acc_add_atomic(a,v)	atomic_long_add(a,v)
++#define __acc_inc_atomic(v)	atomic_long_inc(v)
++#define __acc_dec_atomic(v)	atomic_long_dec(v)
++#else  /* NR_CPUS < CONFIG_SPLIT_PTLOCK_CPUS */
++#define __acc_add_atomic(a,v)	__acc_add_long(a,v)
++#define __acc_inc_atomic(v)	__acc_inc_long(v)
++#define __acc_dec_atomic(v)	__acc_dec_long(v)
++#endif /* NR_CPUS < CONFIG_SPLIT_PTLOCK_CPUS */
++
++
++#define vx_acc_page(m,d,v,r) do {					\
++	if ((d) > 0)							\
++		__acc_inc_long(&(m->v));				\
++	else								\
++		__acc_dec_long(&(m->v));				\
++	__vx_acc_cres(m->mm_vx_info, r, d, m, __FILE__, __LINE__);	\
++} while (0)
++
++#define vx_acc_page_atomic(m,d,v,r) do {				\
++	if ((d) > 0)							\
++		__acc_inc_atomic(&(m->v));				\
++	else								\
++		__acc_dec_atomic(&(m->v));				\
++	__vx_acc_cres(m->mm_vx_info, r, d, m, __FILE__, __LINE__);	\
++} while (0)
++
++
++#define vx_acc_pages(m,p,v,r) do {					\
++	unsigned long __p = (p);					\
++	__acc_add_long(__p, &(m->v));					\
++	__vx_add_cres(m->mm_vx_info, r, __p, m, __FILE__, __LINE__);	\
++} while (0)
++
++#define vx_acc_pages_atomic(m,p,v,r) do {				\
++	unsigned long __p = (p);					\
++	__acc_add_atomic(__p, &(m->v));					\
++	__vx_add_cres(m->mm_vx_info, r, __p, m, __FILE__, __LINE__);	\
++} while (0)
++
++
++
++#define vx_acc_vmpage(m,d) \
++	vx_acc_page(m, d, total_vm,  RLIMIT_AS)
++#define vx_acc_vmlpage(m,d) \
++	vx_acc_page(m, d, locked_vm, RLIMIT_MEMLOCK)
++#define vx_acc_file_rsspage(m,d) \
++	vx_acc_page_atomic(m, d, _file_rss, VLIMIT_MAPPED)
++#define vx_acc_anon_rsspage(m,d) \
++	vx_acc_page_atomic(m, d, _anon_rss, VLIMIT_ANON)
++
++#define vx_acc_vmpages(m,p) \
++	vx_acc_pages(m, p, total_vm,  RLIMIT_AS)
++#define vx_acc_vmlpages(m,p) \
++	vx_acc_pages(m, p, locked_vm, RLIMIT_MEMLOCK)
++#define vx_acc_file_rsspages(m,p) \
++	vx_acc_pages_atomic(m, p, _file_rss, VLIMIT_MAPPED)
++#define vx_acc_anon_rsspages(m,p) \
++	vx_acc_pages_atomic(m, p, _anon_rss, VLIMIT_ANON)
++
++#define vx_pages_add(s,r,p)	__vx_add_cres(s, r, p, 0, __FILE__, __LINE__)
++#define vx_pages_sub(s,r,p)	vx_pages_add(s, r, -(p))
++
++#define vx_vmpages_inc(m)		vx_acc_vmpage(m, 1)
++#define vx_vmpages_dec(m)		vx_acc_vmpage(m,-1)
++#define vx_vmpages_add(m,p)		vx_acc_vmpages(m, p)
++#define vx_vmpages_sub(m,p)		vx_acc_vmpages(m,-(p))
++
++#define vx_vmlocked_inc(m)		vx_acc_vmlpage(m, 1)
++#define vx_vmlocked_dec(m)		vx_acc_vmlpage(m,-1)
++#define vx_vmlocked_add(m,p)		vx_acc_vmlpages(m, p)
++#define vx_vmlocked_sub(m,p)		vx_acc_vmlpages(m,-(p))
++
++#define vx_file_rsspages_inc(m)		vx_acc_file_rsspage(m, 1)
++#define vx_file_rsspages_dec(m)		vx_acc_file_rsspage(m,-1)
++#define vx_file_rsspages_add(m,p)	vx_acc_file_rsspages(m, p)
++#define vx_file_rsspages_sub(m,p)	vx_acc_file_rsspages(m,-(p))
++
++#define vx_anon_rsspages_inc(m)		vx_acc_anon_rsspage(m, 1)
++#define vx_anon_rsspages_dec(m)		vx_acc_anon_rsspage(m,-1)
++#define vx_anon_rsspages_add(m,p)	vx_acc_anon_rsspages(m, p)
++#define vx_anon_rsspages_sub(m,p)	vx_acc_anon_rsspages(m,-(p))
++
++
++#define vx_pages_avail(m,p,r) \
++	__vx_cres_avail((m)->mm_vx_info, r, p, __FILE__, __LINE__)
++
++#define vx_vmpages_avail(m,p)	vx_pages_avail(m, p, RLIMIT_AS)
++#define vx_vmlocked_avail(m,p)	vx_pages_avail(m, p, RLIMIT_MEMLOCK)
++#define vx_anon_avail(m,p)	vx_pages_avail(m, p, VLIMIT_ANON)
++#define vx_mapped_avail(m,p)	vx_pages_avail(m, p, VLIMIT_MAPPED)
++
++#define vx_rss_avail(m,p) \
++	__vx_cres_array_avail((m)->mm_vx_info, VLA_RSS, p, __FILE__, __LINE__)
++
++
++enum {
++	VXPT_UNKNOWN = 0,
++	VXPT_ANON,
++	VXPT_NONE,
++	VXPT_FILE,
++	VXPT_SWAP,
++	VXPT_WRITE
++};
++
++#if 0
++#define	vx_page_fault(mm,vma,type,ret)
++#else
++
++static inline
++void __vx_page_fault(struct mm_struct *mm,
++	struct vm_area_struct *vma, int type, int ret)
++{
++	struct vx_info *vxi = mm->mm_vx_info;
++	int what;
++/*
++	static char *page_type[6] =
++		{ "UNKNOWN", "ANON","NONE", "FILE", "SWAP", "WRITE" };
++	static char *page_what[4] =
++		{ "FAULT_OOM", "FAULT_SIGBUS", "FAULT_MINOR", "FAULT_MAJOR" };
++*/
++
++	if (!vxi)
++		return;
++
++	what = (ret & 0x3);
++
++/*	printk("[%d] page[%d][%d] %2x %s %s\n", vxi->vx_id,
++		type, what, ret, page_type[type], page_what[what]);
++*/
++	if (ret & VM_FAULT_WRITE)
++		what |= 0x4;
++	atomic_inc(&vxi->cacct.page[type][what]);
++}
++
++#define	vx_page_fault(mm,vma,type,ret)	__vx_page_fault(mm,vma,type,ret)
++#endif
++
++
++extern unsigned long vx_badness(struct task_struct *task, struct mm_struct *mm);
++
++#else
++#warning duplicate inclusion
++#endif
+Index: linux-2.6.20/include/linux/vs_network.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vs_network.h
+@@ -0,0 +1,165 @@
++#ifndef _NX_VS_NETWORK_H
++#define _NX_VS_NETWORK_H
++
++#include "vserver/context.h"
++#include "vserver/network.h"
++#include "vserver/base.h"
++#include "vserver/debug.h"
++
++
++#define get_nx_info(i)	__get_nx_info(i,__FILE__,__LINE__)
++
++static inline struct nx_info *__get_nx_info(struct nx_info *nxi,
++	const char *_file, int _line)
++{
++	if (!nxi)
++		return NULL;
++
++	vxlprintk(VXD_CBIT(nid, 2), "get_nx_info(%p[#%d.%d])",
++		nxi, nxi?nxi->nx_id:0, nxi?atomic_read(&nxi->nx_usecnt):0,
++		_file, _line);
++
++	atomic_inc(&nxi->nx_usecnt);
++	return nxi;
++}
++
++
++extern void free_nx_info(struct nx_info *);
++
++#define put_nx_info(i)	__put_nx_info(i,__FILE__,__LINE__)
++
++static inline void __put_nx_info(struct nx_info *nxi, const char *_file, int _line)
++{
++	if (!nxi)
++		return;
++
++	vxlprintk(VXD_CBIT(nid, 2), "put_nx_info(%p[#%d.%d])",
++		nxi, nxi?nxi->nx_id:0, nxi?atomic_read(&nxi->nx_usecnt):0,
++		_file, _line);
++
++	if (atomic_dec_and_test(&nxi->nx_usecnt))
++		free_nx_info(nxi);
++}
++
++
++#define init_nx_info(p,i) __init_nx_info(p,i,__FILE__,__LINE__)
++
++static inline void __init_nx_info(struct nx_info **nxp, struct nx_info *nxi,
++		const char *_file, int _line)
++{
++	if (nxi) {
++		vxlprintk(VXD_CBIT(nid, 3),
++			"init_nx_info(%p[#%d.%d])",
++			nxi, nxi?nxi->nx_id:0,
++			nxi?atomic_read(&nxi->nx_usecnt):0,
++			_file, _line);
++
++		atomic_inc(&nxi->nx_usecnt);
++	}
++	*nxp = nxi;
++}
++
++
++#define set_nx_info(p,i) __set_nx_info(p,i,__FILE__,__LINE__)
++
++static inline void __set_nx_info(struct nx_info **nxp, struct nx_info *nxi,
++	const char *_file, int _line)
++{
++	struct nx_info *nxo;
++
++	if (!nxi)
++		return;
++
++	vxlprintk(VXD_CBIT(nid, 3), "set_nx_info(%p[#%d.%d])",
++		nxi, nxi?nxi->nx_id:0,
++		nxi?atomic_read(&nxi->nx_usecnt):0,
++		_file, _line);
++
++	atomic_inc(&nxi->nx_usecnt);
++	nxo = xchg(nxp, nxi);
++	BUG_ON(nxo);
++}
++
++#define clr_nx_info(p)	__clr_nx_info(p,__FILE__,__LINE__)
++
++static inline void __clr_nx_info(struct nx_info **nxp,
++	const char *_file, int _line)
++{
++	struct nx_info *nxo;
++
++	nxo = xchg(nxp, NULL);
++	if (!nxo)
++		return;
++
++	vxlprintk(VXD_CBIT(nid, 3), "clr_nx_info(%p[#%d.%d])",
++		nxo, nxo?nxo->nx_id:0,
++		nxo?atomic_read(&nxo->nx_usecnt):0,
++		_file, _line);
++
++	if (atomic_dec_and_test(&nxo->nx_usecnt))
++		free_nx_info(nxo);
++}
++
++
++#define claim_nx_info(v,p) __claim_nx_info(v,p,__FILE__,__LINE__)
++
++static inline void __claim_nx_info(struct nx_info *nxi,
++	struct task_struct *task, const char *_file, int _line)
++{
++	vxlprintk(VXD_CBIT(nid, 3), "claim_nx_info(%p[#%d.%d.%d]) %p",
++		nxi, nxi?nxi->nx_id:0,
++		nxi?atomic_read(&nxi->nx_usecnt):0,
++		nxi?atomic_read(&nxi->nx_tasks):0,
++		task, _file, _line);
++
++	atomic_inc(&nxi->nx_tasks);
++}
++
++
++extern void unhash_nx_info(struct nx_info *);
++
++#define release_nx_info(v,p) __release_nx_info(v,p,__FILE__,__LINE__)
++
++static inline void __release_nx_info(struct nx_info *nxi,
++	struct task_struct *task, const char *_file, int _line)
++{
++	vxlprintk(VXD_CBIT(nid, 3), "release_nx_info(%p[#%d.%d.%d]) %p",
++		nxi, nxi?nxi->nx_id:0,
++		nxi?atomic_read(&nxi->nx_usecnt):0,
++		nxi?atomic_read(&nxi->nx_tasks):0,
++		task, _file, _line);
++
++	might_sleep();
++
++	if (atomic_dec_and_test(&nxi->nx_tasks))
++		unhash_nx_info(nxi);
++}
++
++
++#define task_get_nx_info(i)	__task_get_nx_info(i,__FILE__,__LINE__)
++
++static __inline__ struct nx_info *__task_get_nx_info(struct task_struct *p,
++	const char *_file, int _line)
++{
++	struct nx_info *nxi;
++
++	task_lock(p);
++	vxlprintk(VXD_CBIT(nid, 5), "task_get_nx_info(%p)",
++		p, _file, _line);
++	nxi = __get_nx_info(p->nx_info, _file, _line);
++	task_unlock(p);
++	return nxi;
++}
++
++
++
++static inline void exit_nx_info(struct task_struct *p)
++{
++	if (p->nx_info)
++		release_nx_info(p->nx_info, p);
++}
++
++
++#else
++#warning duplicate inclusion
++#endif
+Index: linux-2.6.20/include/linux/vs_pid.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vs_pid.h
+@@ -0,0 +1,133 @@
++#ifndef _VS_PID_H
++#define _VS_PID_H
++
++#include "vserver/base.h"
++#include "vserver/context.h"
++#include "vserver/debug.h"
++#include <linux/pid_namespace.h>
++
++
++/* pid faking stuff */
++
++
++#define vx_info_map_pid(v,p) \
++	__vx_info_map_pid((v), (p), __FUNC__, __FILE__, __LINE__)
++#define vx_info_map_tgid(v,p)  vx_info_map_pid(v,p)
++#define vx_map_pid(p)	vx_info_map_pid(current->vx_info, p)
++#define vx_map_tgid(p) vx_map_pid(p)
++
++static inline int __vx_info_map_pid(struct vx_info *vxi, int pid,
++	const char *func, const char *file, int line)
++{
++	if (vx_info_flags(vxi, VXF_INFO_INIT, 0)) {
++		vxfprintk(VXD_CBIT(cvirt, 2),
++			"vx_map_tgid: %p/%llx: %d -> %d",
++			vxi, (long long)vxi->vx_flags, pid,
++			(pid && pid == vxi->vx_initpid)?1:pid,
++			func, file, line);
++		if (pid == 0)
++			return 0;
++		if (pid == vxi->vx_initpid)
++			return 1;
++	}
++	return pid;
++}
++
++#define vx_info_rmap_pid(v,p) \
++	__vx_info_rmap_pid((v), (p), __FUNC__, __FILE__, __LINE__)
++#define vx_rmap_pid(p)	vx_info_rmap_pid(current->vx_info, p)
++#define vx_rmap_tgid(p) vx_rmap_pid(p)
++
++static inline int __vx_info_rmap_pid(struct vx_info *vxi, int pid,
++	const char *func, const char *file, int line)
++{
++	if (vx_info_flags(vxi, VXF_INFO_INIT, 0)) {
++		vxfprintk(VXD_CBIT(cvirt, 2),
++			"vx_rmap_tgid: %p/%llx: %d -> %d",
++			vxi, (long long)vxi->vx_flags, pid,
++			(pid == 1)?vxi->vx_initpid:pid,
++			func, file, line);
++		if ((pid == 1) && vxi->vx_initpid)
++			return vxi->vx_initpid;
++		if (pid == vxi->vx_initpid)
++			return ~0U;
++	}
++	return pid;
++}
++
++
++#define VXF_FAKE_INIT	(VXF_INFO_INIT|VXF_STATE_INIT)
++
++static inline
++int vx_proc_task_visible(struct task_struct *task)
++{
++	if ((task->pid == 1) &&
++		!vx_flags(VXF_FAKE_INIT, VXF_FAKE_INIT))
++		/* show a blend through init */
++		goto visible;
++	if (vx_check(vx_task_xid(task), VS_WATCH|VS_IDENT))
++		goto visible;
++	return 0;
++visible:
++	return 1;
++}
++
++static inline
++struct task_struct *vx_find_proc_task_by_pid(int pid)
++{
++	struct task_struct *task = find_task_by_pid(pid);
++
++	if (task && !vx_proc_task_visible(task)) {
++		vxdprintk(VXD_CBIT(misc, 6),
++			"dropping task (find) %p[#%u,%u] for %p[#%u,%u]",
++			task, task->xid, task->pid,
++			current, current->xid, current->pid);
++		task = NULL;
++	}
++	return task;
++}
++
++static inline
++struct task_struct *vx_get_proc_task(struct inode *inode, struct pid *pid)
++{
++	struct task_struct *task = get_pid_task(pid, PIDTYPE_PID);
++
++	if (task && !vx_proc_task_visible(task)) {
++		vxdprintk(VXD_CBIT(misc, 6),
++			"dropping task (get) %p[#%u,%u] for %p[#%u,%u]",
++			task, task->xid, task->pid,
++			current, current->xid, current->pid);
++		put_task_struct(task);
++		task = NULL;
++	}
++	return task;
++}
++
++
++static inline
++struct task_struct *vx_child_reaper(struct task_struct *p)
++{
++	struct vx_info *vxi = p->vx_info;
++	struct task_struct *reaper = child_reaper(p);
++
++	if (!vxi)
++		goto out;
++
++	BUG_ON(!p->vx_info->vx_reaper);
++
++	/* child reaper for the guest reaper */
++	if (vxi->vx_reaper == p)
++		goto out;
++
++	reaper = vxi->vx_reaper;
++out:
++	vxdprintk(VXD_CBIT(xid, 7),
++		"vx_child_reaper(%p[#%u,%u]) = %p[#%u,%u]",
++		p, p->xid, p->pid, reaper, reaper->xid, reaper->pid);
++	return reaper;
++}
++
++
++#else
++#warning duplicate inclusion
++#endif
+Index: linux-2.6.20/include/linux/vs_sched.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vs_sched.h
+@@ -0,0 +1,110 @@
++#ifndef _VS_SCHED_H
++#define _VS_SCHED_H
++
++#include "vserver/base.h"
++#include "vserver/context.h"
++#include "vserver/sched.h"
++
++
++#define VAVAVOOM_RATIO		 50
++
++#define MAX_PRIO_BIAS		 20
++#define MIN_PRIO_BIAS		-20
++
++
++#ifdef CONFIG_VSERVER_HARDCPU
++
++/*
++ * effective_prio - return the priority that is based on the static
++ * priority but is modified by bonuses/penalties.
++ *
++ * We scale the actual sleep average [0 .... MAX_SLEEP_AVG]
++ * into a -4 ... 0 ... +4 bonus/penalty range.
++ *
++ * Additionally, we scale another amount based on the number of
++ * CPU tokens currently held by the context, if the process is
++ * part of a context (and the appropriate SCHED flag is set).
++ * This ranges from -5 ... 0 ... +15, quadratically.
++ *
++ * So, the total bonus is -9 .. 0 .. +19
++ * We use ~50% of the full 0...39 priority range so that:
++ *
++ * 1) nice +19 interactive tasks do not preempt nice 0 CPU hogs.
++ * 2) nice -20 CPU hogs do not get preempted by nice 0 tasks.
++ *    unless that context is far exceeding its CPU allocation.
++ *
++ * Both properties are important to certain workloads.
++ */
++static inline
++int vx_effective_vavavoom(struct _vx_sched_pc *sched_pc, int max_prio)
++{
++	int vavavoom, max;
++
++	/* lots of tokens = lots of vavavoom
++	 *      no tokens = no vavavoom      */
++	if ((vavavoom = sched_pc->tokens) >= 0) {
++		max = sched_pc->tokens_max;
++		vavavoom = max - vavavoom;
++		max = max * max;
++		vavavoom = max_prio * VAVAVOOM_RATIO / 100
++			* (vavavoom*vavavoom - (max >> 2)) / max;
++		return vavavoom;
++	}
++	return 0;
++}
++
++
++static inline
++int vx_adjust_prio(struct task_struct *p, int prio, int max_user)
++{
++	struct vx_info *vxi = p->vx_info;
++	struct _vx_sched_pc *sched_pc;
++
++	if (!vxi)
++		return prio;
++
++	sched_pc = &vx_cpu(vxi, sched_pc);
++	if (vx_info_flags(vxi, VXF_SCHED_PRIO, 0)) {
++		int vavavoom = vx_effective_vavavoom(sched_pc, max_user);
++
++		sched_pc->vavavoom = vavavoom;
++		prio += vavavoom;
++	}
++	prio += sched_pc->prio_bias;
++	return prio;
++}
++
++#else /* !CONFIG_VSERVER_HARDCPU */
++
++static inline
++int vx_adjust_prio(struct task_struct *p, int prio, int max_user)
++{
++	struct vx_info *vxi = p->vx_info;
++
++	if (vxi)
++		prio += vx_cpu(vxi, sched_pc).prio_bias;
++	return prio;
++}
++
++#endif /* CONFIG_VSERVER_HARDCPU */
++
++
++static inline void vx_account_user(struct vx_info *vxi,
++	cputime_t cputime, int nice)
++{
++	if (!vxi)
++		return;
++	vx_cpu(vxi, sched_pc).user_ticks += cputime;
++}
++
++static inline void vx_account_system(struct vx_info *vxi,
++	cputime_t cputime, int idle)
++{
++	if (!vxi)
++		return;
++	vx_cpu(vxi, sched_pc).sys_ticks += cputime;
++}
++
++#else
++#warning duplicate inclusion
++#endif
+Index: linux-2.6.20/include/linux/vs_socket.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vs_socket.h
+@@ -0,0 +1,80 @@
++#ifndef _VS_SOCKET_H
++#define _VS_SOCKET_H
++
++#include "vserver/debug.h"
++#include "vserver/base.h"
++#include "vserver/cacct.h"
++#include "vserver/context.h"
++#include "vserver/tag.h"
++
++
++/* socket accounting */
++
++#include <linux/socket.h>
++
++static inline int vx_sock_type(int family)
++{
++	switch (family) {
++	case PF_UNSPEC:
++		return VXA_SOCK_UNSPEC;
++	case PF_UNIX:
++		return VXA_SOCK_UNIX;
++	case PF_INET:
++		return VXA_SOCK_INET;
++	case PF_INET6:
++		return VXA_SOCK_INET6;
++	case PF_PACKET:
++		return VXA_SOCK_PACKET;
++	default:
++		return VXA_SOCK_OTHER;
++	}
++}
++
++#define vx_acc_sock(v,f,p,s) \
++	__vx_acc_sock((v), (f), (p), (s), __FILE__, __LINE__)
++
++static inline void __vx_acc_sock(struct vx_info *vxi,
++	int family, int pos, int size, char *file, int line)
++{
++	if (vxi) {
++		int type = vx_sock_type(family);
++
++		atomic_long_inc(&vxi->cacct.sock[type][pos].count);
++		atomic_long_add(size, &vxi->cacct.sock[type][pos].total);
++	}
++}
++
++#define vx_sock_recv(sk,s) \
++	vx_acc_sock((sk)->sk_vx_info, (sk)->sk_family, 0, (s))
++#define vx_sock_send(sk,s) \
++	vx_acc_sock((sk)->sk_vx_info, (sk)->sk_family, 1, (s))
++#define vx_sock_fail(sk,s) \
++	vx_acc_sock((sk)->sk_vx_info, (sk)->sk_family, 2, (s))
++
++
++#define sock_vx_init(s) do {		\
++	(s)->sk_xid = 0;		\
++	(s)->sk_vx_info = NULL;		\
++	} while (0)
++
++#define sock_nx_init(s) do {		\
++	(s)->sk_nid = 0;		\
++	(s)->sk_nx_info = NULL;		\
++	} while (0)
++
++static inline
++int vx_socket_peer_tag(struct socket *sock, int level,
++	char __user *optval, int __user *optlen, int len)
++{
++	struct peer_tag tag;
++
++	tag.xid = sock->sk->sk_xid;
++	tag.nid = sock->sk->sk_nid;
++	if (copy_to_user(optval, &tag, sizeof(tag)))
++		return -EFAULT;
++	return 0;
++}
++
++#else
++#warning duplicate inclusion
++#endif
+Index: linux-2.6.20/include/linux/vs_tag.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vs_tag.h
+@@ -0,0 +1,44 @@
++#ifndef _VS_TAG_H
++#define _VS_TAG_H
++
++#include <linux/vserver/tag.h>
++
++/* check conditions */
++
++#define DX_ADMIN	0x0001
++#define DX_WATCH	0x0002
++#define DX_HOSTID	0x0008
++
++#define DX_IDENT	0x0010
++
++#define DX_ARG_MASK	0x0010
++
++
++#define dx_task_tag(t)	((t)->xid)
++
++#define dx_current_tag() dx_task_tag(current)
++
++#define dx_check(c,m)	__dx_check(dx_current_tag(),c,m)
++
++#define dx_weak_check(c,m)	((m) ? dx_check(c,m) : 1)
++
++
++/*
++ * check current context for ADMIN/WATCH and
++ * optionally against supplied argument
++ */
++static inline int __dx_check(tag_t cid, tag_t id, unsigned int mode)
++{
++	if (mode & DX_ARG_MASK) {
++		if ((mode & DX_IDENT) &&
++			(id == cid))
++			return 1;
++	}
++	return (((mode & DX_ADMIN) && (cid == 0)) ||
++		((mode & DX_WATCH) && (cid == 1)) ||
++		((mode & DX_HOSTID) && (id == 0)));
++}
++
++#else
++#warning duplicate inclusion
++#endif
+Index: linux-2.6.20/include/linux/vs_time.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vs_time.h
+@@ -0,0 +1,19 @@
++#ifndef _VS_TIME_H
++#define _VS_TIME_H
++
++
++/* time faking stuff */
++
++#ifdef CONFIG_VSERVER_VTIME
++
++extern void vx_gettimeofday(struct timeval *tv);
++extern int vx_settimeofday(struct timespec *ts);
++
++#else
++#define	vx_gettimeofday(t)	do_gettimeofday(t)
++#define	vx_settimeofday(t)	do_settimeofday(t)
++#endif
++
++#else
++#warning duplicate inclusion
++#endif
+Index: linux-2.6.20/include/linux/vserver/Kbuild
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vserver/Kbuild
+@@ -0,0 +1,7 @@
++
++unifdef-y += context_cmd.h network_cmd.h space_cmd.h \
++	cacct_cmd.h cvirt_cmd.h limit_cmd.h dlimit_cmd.h \
++	inode_cmd.h sched_cmd.h signal_cmd.h debug_cmd.h
++
++unifdef-y += switch.h network.h monitor.h inode.h
++
+Index: linux-2.6.20/include/linux/vserver/base.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vserver/base.h
+@@ -0,0 +1,217 @@
++#ifndef _VX_BASE_H
++#define _VX_BASE_H
++
++
++/* context state changes */
++
++enum {
++	VSC_STARTUP = 1,
++	VSC_SHUTDOWN,
++
++	VSC_NETUP,
++	VSC_NETDOWN,
++};
++
++
++#define MAX_S_CONTEXT	65535	/* Arbitrary limit */
++
++/* check conditions */
++
++#define VS_ADMIN	0x0001
++#define VS_WATCH	0x0002
++#define VS_HIDE		0x0004
++#define VS_HOSTID	0x0008
++
++#define VS_IDENT	0x0010
++#define VS_EQUIV	0x0020
++#define VS_PARENT	0x0040
++#define VS_CHILD	0x0080
++
++#define VS_ARG_MASK	0x00F0
++
++#ifdef	CONFIG_VSERVER_PRIVACY
++#define VS_ADMIN_P	(0)
++#define VS_WATCH_P	(0)
++#else
++#define VS_ADMIN_P	VS_ADMIN
++#define VS_WATCH_P	VS_WATCH
++#endif
++
++#define VS_HARDIRQ	0x1000
++#define VS_SOFTIRQ	0x2000
++#define VS_IRQ		0x4000
++
++#define VS_IRQ_MASK	0xF000
++
++#include <linux/hardirq.h>
++
++/*
++ * check current context for ADMIN/WATCH and
++ * optionally against supplied argument
++ */
++static inline int __vs_check(int cid, int id, unsigned int mode)
++{
++	if (mode & VS_ARG_MASK) {
++		if ((mode & VS_IDENT) &&
++			(id == cid))
++			return 1;
++	}
++	if (mode & VS_IRQ_MASK) {
++		if ((mode & VS_IRQ) && unlikely(in_interrupt()))
++			return 1;
++		if ((mode & VS_HARDIRQ) && unlikely(in_irq()))
++			return 1;
++		if ((mode & VS_SOFTIRQ) && unlikely(in_softirq()))
++			return 1;
++	}
++	return (((mode & VS_ADMIN) && (cid == 0)) ||
++		((mode & VS_WATCH) && (cid == 1)) ||
++		((mode & VS_HOSTID) && (id == 0)));
++}
++
++#define vx_task_xid(t)	((t)->xid)
++
++#define vx_current_xid() vx_task_xid(current)
++
++#define current_vx_info() (current->vx_info)
++
++
++#define vx_check(c,m)	__vs_check(vx_current_xid(),c,(m)|VS_IRQ)
++
++#define vx_weak_check(c,m)	((m) ? vx_check(c,m) : 1)
++
++
++#define nx_task_nid(t)	((t)->nid)
++
++#define nx_current_nid() nx_task_nid(current)
++
++#define current_nx_info() (current->nx_info)
++
++
++#define nx_check(c,m)	__vs_check(nx_current_nid(),c,m)
++
++#define nx_weak_check(c,m)	((m) ? nx_check(c,m) : 1)
++
++
++
++/* generic flag merging */
++
++#define vs_check_flags(v,m,f)	(((v) & (m)) ^ (f))
++
++#define vs_mask_flags(v,f,m)	(((v) & ~(m)) | ((f) & (m)))
++
++#define vs_mask_mask(v,f,m)	(((v) & ~(m)) | ((v) & (f) & (m)))
++
++#define vs_check_bit(v,n)	((v) & (1LL << (n)))
++
++
++/* context flags */
++
++#define __vx_flags(v)	((v) ? (v)->vx_flags : 0)
++
++#define vx_current_flags()	__vx_flags(current->vx_info)
++
++#define vx_info_flags(v,m,f) \
++	vs_check_flags(__vx_flags(v),(m),(f))
++
++#define task_vx_flags(t,m,f) \
++	((t) && vx_info_flags((t)->vx_info, (m), (f)))
++
++#define vx_flags(m,f)	vx_info_flags(current->vx_info,(m),(f))
++
++
++/* context caps */
++
++#define __vx_ccaps(v)	((v) ? (v)->vx_ccaps : 0)
++
++#define vx_current_ccaps()	__vx_ccaps(current->vx_info)
++
++#define vx_info_ccaps(v,c)	(__vx_ccaps(v) & (c))
++
++#define vx_ccaps(c)	vx_info_ccaps(current->vx_info,(c))
++
++
++
++/* network flags */
++
++#define __nx_flags(v)	((v) ? (v)->nx_flags : 0)
++
++#define nx_current_flags()	__nx_flags(current->nx_info)
++
++#define nx_info_flags(v,m,f) \
++	vs_check_flags(__nx_flags(v),(m),(f))
++
++#define task_nx_flags(t,m,f) \
++	((t) && nx_info_flags((t)->nx_info, (m), (f)))
++
++#define nx_flags(m,f)	nx_info_flags(current->nx_info,(m),(f))
++
++
++/* network caps */
++
++#define __nx_ncaps(v)	((v) ? (v)->nx_ncaps : 0)
++
++#define nx_current_ncaps()	__nx_ncaps(current->nx_info)
++
++#define nx_info_ncaps(v,c)	(__nx_ncaps(v) & (c))
++
++#define nx_ncaps(c)	nx_info_ncaps(current->nx_info,(c))
++
++
++/* context mask capabilities */
++
++#define __vx_mcaps(v)	((v) ? (v)->vx_ccaps >> 32UL : ~0 )
++
++#define vx_info_mcaps(v,c)	(__vx_mcaps(v) & (c))
++
++#define vx_mcaps(c)	vx_info_mcaps(current->vx_info,(c))
++
++
++/* context bcap mask */
++
++#define __vx_bcaps(v)	((v) ? (v)->vx_bcaps : ~0 )
++
++#define vx_current_bcaps()	__vx_bcaps(current->vx_info)
++
++#define vx_info_bcaps(v,c)	(__vx_bcaps(v) & (c))
++
++#define vx_bcaps(c)	vx_info_bcaps(current->vx_info,(c))
++
++
++#define vx_info_cap_bset(v)	((v) ? (v)->vx_cap_bset : cap_bset)
++
++#define vx_current_cap_bset()	vx_info_cap_bset(current->vx_info)
++
++
++#define __vx_info_mbcap(v,b) \
++	(!vx_info_flags(v, VXF_STATE_SETUP, 0) ? \
++	vx_info_bcaps(v, b) : (b))
++
++#define vx_info_mbcap(v,b)	__vx_info_mbcap(v,cap_t(b))
++
++#define task_vx_mbcap(t,b) \
++	vx_info_mbcap((t)->vx_info, (t)->b)
++
++#define vx_mbcap(b)	task_vx_mbcap(current,b)
++
++#define vx_cap_raised(v,c,f)	(vx_info_mbcap(v,c) & CAP_TO_MASK(f))
++
++#define vx_capable(b,c) (capable(b) || \
++	(cap_raised(current->cap_effective,b) && vx_ccaps(c)))
++
++
++#define vx_current_initpid(n) \
++	(current->vx_info && \
++	(current->vx_info->vx_initpid == (n)))
++
++
++#define __vx_state(v)	((v) ? ((v)->vx_state) : 0)
++
++#define vx_info_state(v,m)	(__vx_state(v) & (m))
++
++
++#define __nx_state(v)	((v) ? ((v)->nx_state) : 0)
++
++#define nx_info_state(v,m)	(__nx_state(v) & (m))
++
++#endif
+Index: linux-2.6.20/include/linux/vserver/cacct.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vserver/cacct.h
+@@ -0,0 +1,15 @@
++#ifndef _VX_CACCT_H
++#define _VX_CACCT_H
++
++
++enum sock_acc_field {
++	VXA_SOCK_UNSPEC = 0,
++	VXA_SOCK_UNIX,
++	VXA_SOCK_INET,
++	VXA_SOCK_INET6,
++	VXA_SOCK_PACKET,
++	VXA_SOCK_OTHER,
++	VXA_SOCK_SIZE	/* array size */
++};
++
++#endif	/* _VX_CACCT_H */
+Index: linux-2.6.20/include/linux/vserver/cacct_cmd.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vserver/cacct_cmd.h
+@@ -0,0 +1,23 @@
++#ifndef _VX_CACCT_CMD_H
++#define _VX_CACCT_CMD_H
++
++
++/* virtual host info name commands */
++
++#define VCMD_sock_stat		VC_CMD(VSTAT, 5, 0)
++
++struct	vcmd_sock_stat_v0 {
++	uint32_t field;
++	uint32_t count[3];
++	uint64_t total[3];
++};
++
++
++#ifdef	__KERNEL__
++
++#include <linux/compiler.h>
++
++extern int vc_sock_stat(struct vx_info *, void __user *);
++
++#endif	/* __KERNEL__ */
++#endif	/* _VX_CACCT_CMD_H */
+Index: linux-2.6.20/include/linux/vserver/cacct_def.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vserver/cacct_def.h
+@@ -0,0 +1,43 @@
++#ifndef _VX_CACCT_DEF_H
++#define _VX_CACCT_DEF_H
++
++#include <asm/atomic.h>
++#include <linux/vserver/cacct.h>
++
++
++struct _vx_sock_acc {
++	atomic_long_t count;
++	atomic_long_t total;
++};
++
++/* context sub struct */
++
++struct _vx_cacct {
++	struct _vx_sock_acc sock[VXA_SOCK_SIZE][3];
++	atomic_t slab[8];
++	atomic_t page[6][8];
++};
++
++#ifdef CONFIG_VSERVER_DEBUG
++
++static inline void __dump_vx_cacct(struct _vx_cacct *cacct)
++{
++	int i,j;
++
++	printk("\t_vx_cacct:");
++	for (i=0; i<6; i++) {
++		struct _vx_sock_acc *ptr = cacct->sock[i];
++
++		printk("\t [%d] =", i);
++		for (j=0; j<3; j++) {
++			printk(" [%d] = %8lu, %8lu", j,
++				atomic_long_read(&ptr[j].count),
++				atomic_long_read(&ptr[j].total));
++		}
++		printk("\n");
++	}
++}
++
++#endif
++
++#endif	/* _VX_CACCT_DEF_H */
+Index: linux-2.6.20/include/linux/vserver/cacct_int.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vserver/cacct_int.h
+@@ -0,0 +1,21 @@
++#ifndef _VX_CACCT_INT_H
++#define _VX_CACCT_INT_H
++
++
++#ifdef	__KERNEL__
++
++static inline
++unsigned long vx_sock_count(struct _vx_cacct *cacct, int type, int pos)
++{
++	return atomic_long_read(&cacct->sock[type][pos].count);
++}
++
++
++static inline
++unsigned long vx_sock_total(struct _vx_cacct *cacct, int type, int pos)
++{
++	return atomic_long_read(&cacct->sock[type][pos].total);
++}
++
++#endif	/* __KERNEL__ */
++#endif	/* _VX_CACCT_INT_H */
+Index: linux-2.6.20/include/linux/vserver/context.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vserver/context.h
+@@ -0,0 +1,170 @@
++#ifndef _VX_CONTEXT_H
++#define _VX_CONTEXT_H
++
++#include <linux/types.h>
++#include <linux/capability.h>
++
++
++/* context flags */
++
++#define VXF_INFO_SCHED		0x00000002
++#define VXF_INFO_NPROC		0x00000004
++#define VXF_INFO_PRIVATE	0x00000008
++
++#define VXF_INFO_INIT		0x00000010
++#define VXF_INFO_HIDE		0x00000020
++#define VXF_INFO_ULIMIT		0x00000040
++#define VXF_INFO_NSPACE		0x00000080
++
++#define VXF_SCHED_HARD		0x00000100
++#define VXF_SCHED_PRIO		0x00000200
++#define VXF_SCHED_PAUSE		0x00000400
++
++#define VXF_VIRT_MEM		0x00010000
++#define VXF_VIRT_UPTIME		0x00020000
++#define VXF_VIRT_CPU		0x00040000
++#define VXF_VIRT_LOAD		0x00080000
++#define VXF_VIRT_TIME		0x00100000
++
++#define VXF_HIDE_MOUNT		0x01000000
++/* was	VXF_HIDE_NETIF		0x02000000 */
++#define VXF_HIDE_VINFO		0x04000000
++
++#define VXF_STATE_SETUP		(1ULL<<32)
++#define VXF_STATE_INIT		(1ULL<<33)
++#define VXF_STATE_ADMIN		(1ULL<<34)
++
++#define VXF_SC_HELPER		(1ULL<<36)
++#define VXF_REBOOT_KILL		(1ULL<<37)
++#define VXF_PERSISTENT		(1ULL<<38)
++
++#define VXF_FORK_RSS		(1ULL<<48)
++#define VXF_PROLIFIC		(1ULL<<49)
++
++#define VXF_IGNEG_NICE		(1ULL<<52)
++
++#define VXF_ONE_TIME		(0x0007ULL<<32)
++
++#define VXF_INIT_SET		(VXF_STATE_SETUP|VXF_STATE_INIT|VXF_STATE_ADMIN)
++
++
++/* context migration */
++
++#define VXM_SET_INIT		0x00000001
++#define VXM_SET_REAPER		0x00000002
++
++/* context caps */
++
++#define VXC_CAP_MASK		0x00000000
++
++#define VXC_SET_UTSNAME		0x00000001
++#define VXC_SET_RLIMIT		0x00000002
++
++#define VXC_RAW_ICMP		0x00000100
++#define VXC_SYSLOG		0x00001000
++
++#define VXC_SECURE_MOUNT	0x00010000
++#define VXC_SECURE_REMOUNT	0x00020000
++#define VXC_BINARY_MOUNT	0x00040000
++
++#define VXC_QUOTA_CTL		0x00100000
++#define VXC_ADMIN_MAPPER	0x00200000
++#define VXC_ADMIN_CLOOP		0x00400000
++
++
++#ifdef	__KERNEL__
++
++#include <linux/list.h>
++#include <linux/spinlock.h>
++#include <linux/rcupdate.h>
++
++#include "limit_def.h"
++#include "sched_def.h"
++#include "cvirt_def.h"
++#include "cacct_def.h"
++
++struct _vx_info_pc {
++	struct _vx_sched_pc sched_pc;
++	struct _vx_cvirt_pc cvirt_pc;
++};
++
++struct vx_info {
++	struct hlist_node vx_hlist;		/* linked list of contexts */
++	xid_t vx_id;				/* context id */
++	atomic_t vx_usecnt;			/* usage count */
++	atomic_t vx_tasks;			/* tasks count */
++	struct vx_info *vx_parent;		/* parent context */
++	int vx_state;				/* context state */
++
++	unsigned long vx_nsmask;		/* assignment mask */
++	struct nsproxy *vx_nsproxy;		/* private namespace */
++	struct fs_struct *vx_fs;		/* private namespace fs */
++
++	uint64_t vx_flags;			/* context flags */
++	uint64_t vx_bcaps;			/* bounding caps (system) */
++	uint64_t vx_ccaps;			/* context caps (vserver) */
++	kernel_cap_t vx_cap_bset;		/* the guest's bset */
++
++	struct task_struct *vx_reaper;		/* guest reaper process */
++	pid_t vx_initpid;			/* PID of guest init */
++
++	struct _vx_limit limit;			/* vserver limits */
++	struct _vx_sched sched;			/* vserver scheduler */
++	struct _vx_cvirt cvirt;			/* virtual/bias stuff */
++	struct _vx_cacct cacct;			/* context accounting */
++
++#ifndef CONFIG_SMP
++	struct _vx_info_pc info_pc;		/* per cpu data */
++#else
++	struct _vx_info_pc *ptr_pc;		/* per cpu array */
++#endif
++
++	wait_queue_head_t vx_wait;		/* context exit waitqueue */
++	int reboot_cmd;				/* last sys_reboot() cmd */
++	int exit_code;				/* last process exit code */
++
++	char vx_name[65];			/* vserver name */
++};
++
++#ifndef CONFIG_SMP
++#define	vx_ptr_pc(vxi)		(&(vxi)->info_pc)
++#define	vx_per_cpu(vxi, v, id)	vx_ptr_pc(vxi)->v
++#else
++#define	vx_ptr_pc(vxi)		((vxi)->ptr_pc)
++#define	vx_per_cpu(vxi, v, id)	per_cpu_ptr(vx_ptr_pc(vxi), id)->v
++#endif
++
++#define	vx_cpu(vxi, v)		vx_per_cpu(vxi, v, smp_processor_id())
++
++
++struct vx_info_save {
++	struct vx_info *vxi;
++	xid_t xid;
++};
++
++
++/* status flags */
++
++#define VXS_HASHED	0x0001
++#define VXS_PAUSED	0x0010
++#define VXS_SHUTDOWN	0x0100
++#define VXS_HELPER	0x1000
++#define VXS_RELEASED	0x8000
++
++
++extern void claim_vx_info(struct vx_info *, struct task_struct *);
++extern void release_vx_info(struct vx_info *, struct task_struct *);
++
++extern struct vx_info *lookup_vx_info(int);
++extern struct vx_info *lookup_or_create_vx_info(int);
++
++extern int get_xid_list(int, unsigned int *, int);
++extern int xid_is_hashed(xid_t);
++
++extern int vx_migrate_task(struct task_struct *, struct vx_info *, int);
++
++extern long vs_state_change(struct vx_info *, unsigned int);
++
++
++#endif	/* __KERNEL__ */
++#endif	/* _VX_CONTEXT_H */
+Index: linux-2.6.20/include/linux/vserver/context_cmd.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vserver/context_cmd.h
+@@ -0,0 +1,123 @@
++#ifndef _VX_CONTEXT_CMD_H
++#define _VX_CONTEXT_CMD_H
++
++
++/* vinfo commands */
++
++#define VCMD_task_xid		VC_CMD(VINFO, 1, 0)
++
++#ifdef	__KERNEL__
++extern int vc_task_xid(uint32_t, void __user *);
++
++#endif	/* __KERNEL__ */
++
++#define VCMD_vx_info		VC_CMD(VINFO, 5, 0)
++
++struct	vcmd_vx_info_v0 {
++	uint32_t xid;
++	uint32_t initpid;
++	/* more to come */
++};
++
++#ifdef	__KERNEL__
++extern int vc_vx_info(struct vx_info *, void __user *);
++
++#endif	/* __KERNEL__ */
++
++#define VCMD_ctx_stat		VC_CMD(VSTAT, 0, 0)
++
++struct	vcmd_ctx_stat_v0 {
++	uint32_t usecnt;
++	uint32_t tasks;
++	/* more to come */
++};
++
++#ifdef	__KERNEL__
++extern int vc_ctx_stat(struct vx_info *, void __user *);
++
++#endif	/* __KERNEL__ */
++
++/* context commands */
++
++#define VCMD_ctx_create_v0	VC_CMD(VPROC, 1, 0)
++#define VCMD_ctx_create		VC_CMD(VPROC, 1, 1)
++
++struct	vcmd_ctx_create {
++	uint64_t flagword;
++};
++
++#define VCMD_ctx_migrate_v0	VC_CMD(PROCMIG, 1, 0)
++#define VCMD_ctx_migrate	VC_CMD(PROCMIG, 1, 1)
++
++struct	vcmd_ctx_migrate {
++	uint64_t flagword;
++};
++
++#ifdef	__KERNEL__
++extern int vc_ctx_create(uint32_t, void __user *);
++extern int vc_ctx_migrate(struct vx_info *, void __user *);
++
++#endif	/* __KERNEL__ */
++
++
++/* flag commands */
++
++#define VCMD_get_cflags		VC_CMD(FLAGS, 1, 0)
++#define VCMD_set_cflags		VC_CMD(FLAGS, 2, 0)
++
++struct	vcmd_ctx_flags_v0 {
++	uint64_t flagword;
++	uint64_t mask;
++};
++
++#ifdef	__KERNEL__
++extern int vc_get_cflags(struct vx_info *, void __user *);
++extern int vc_set_cflags(struct vx_info *, void __user *);
++
++#endif	/* __KERNEL__ */
++
++
++/* context caps commands */
++
++#define VCMD_get_ccaps_v0	VC_CMD(FLAGS, 3, 0)
++#define VCMD_set_ccaps_v0	VC_CMD(FLAGS, 4, 0)
++
++struct	vcmd_ctx_caps_v0 {
++	uint64_t bcaps;
++	uint64_t ccaps;
++	uint64_t cmask;
++};
++
++#define VCMD_get_ccaps		VC_CMD(FLAGS, 3, 1)
++#define VCMD_set_ccaps		VC_CMD(FLAGS, 4, 1)
++
++struct	vcmd_ctx_caps_v1 {
++	uint64_t ccaps;
++	uint64_t cmask;
++};
++
++#ifdef	__KERNEL__
++extern int vc_get_ccaps_v0(struct vx_info *, void __user *);
++extern int vc_set_ccaps_v0(struct vx_info *, void __user *);
++extern int vc_get_ccaps(struct vx_info *, void __user *);
++extern int vc_set_ccaps(struct vx_info *, void __user *);
++
++#endif	/* __KERNEL__ */
++
++
++/* bcaps commands */
++
++#define VCMD_get_bcaps		VC_CMD(FLAGS, 9, 0)
++#define VCMD_set_bcaps		VC_CMD(FLAGS,10, 0)
++
++struct	vcmd_bcaps {
++	uint64_t bcaps;
++	uint64_t bmask;
++};
++
++#ifdef	__KERNEL__
++extern int vc_get_bcaps(struct vx_info *, void __user *);
++extern int vc_set_bcaps(struct vx_info *, void __user *);
++
++#endif	/* __KERNEL__ */
++#endif	/* _VX_CONTEXT_CMD_H */
+Index: linux-2.6.20/include/linux/vserver/cvirt.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vserver/cvirt.h
+@@ -0,0 +1,20 @@
++#ifndef _VX_CVIRT_H
++#define _VX_CVIRT_H
++
++
++#ifdef	__KERNEL__
++
++struct timespec;
++
++void vx_vsi_uptime(struct timespec *, struct timespec *);
++
++
++struct vx_info;
++
++void vx_update_load(struct vx_info *);
++
++
++int vx_do_syslog(int, char __user *, int);
++
++#endif	/* __KERNEL__ */
++#endif	/* _VX_CVIRT_H */
+Index: linux-2.6.20/include/linux/vserver/cvirt_cmd.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vserver/cvirt_cmd.h
+@@ -0,0 +1,53 @@
++#ifndef _VX_CVIRT_CMD_H
++#define _VX_CVIRT_CMD_H
++
++
++/* virtual host info name commands */
++
++#define VCMD_set_vhi_name	VC_CMD(VHOST, 1, 0)
++#define VCMD_get_vhi_name	VC_CMD(VHOST, 2, 0)
++
++struct	vcmd_vhi_name_v0 {
++	uint32_t field;
++	char name[65];
++};
++
++
++enum vhi_name_field {
++	VHIN_CONTEXT=0,
++	VHIN_SYSNAME,
++	VHIN_NODENAME,
++	VHIN_RELEASE,
++	VHIN_VERSION,
++	VHIN_MACHINE,
++	VHIN_DOMAINNAME,
++};
++
++
++#ifdef	__KERNEL__
++
++#include <linux/compiler.h>
++
++extern int vc_set_vhi_name(struct vx_info *, void __user *);
++extern int vc_get_vhi_name(struct vx_info *, void __user *);
++
++#endif	/* __KERNEL__ */
++
++#define VCMD_virt_stat		VC_CMD(VSTAT, 3, 0)
++
++struct	vcmd_virt_stat_v0 {
++	uint64_t offset;
++	uint64_t uptime;
++	uint32_t nr_threads;
++	uint32_t nr_running;
++	uint32_t nr_uninterruptible;
++	uint32_t nr_onhold;
++	uint32_t nr_forks;
++	uint32_t load[3];
++};
++
++#ifdef	__KERNEL__
++extern int vc_virt_stat(struct vx_info *, void __user *);
++
++#endif	/* __KERNEL__ */
++#endif	/* _VX_CVIRT_CMD_H */
+Index: linux-2.6.20/include/linux/vserver/cvirt_def.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vserver/cvirt_def.h
+@@ -0,0 +1,82 @@
++#ifndef _VX_CVIRT_DEF_H
++#define _VX_CVIRT_DEF_H
++
++#include <linux/jiffies.h>
++#include <linux/spinlock.h>
++#include <linux/wait.h>
++#include <linux/time.h>
++#include <linux/utsname.h>
++#include <asm/atomic.h>
++
++
++struct _vx_usage_stat {
++	uint64_t user;
++	uint64_t nice;
++	uint64_t system;
++	uint64_t softirq;
++	uint64_t irq;
++	uint64_t idle;
++	uint64_t iowait;
++};
++
++struct _vx_syslog {
++	wait_queue_head_t log_wait;
++	spinlock_t logbuf_lock;		/* lock for the log buffer */
++
++	unsigned long log_start;	/* next char to be read by syslog() */
++	unsigned long con_start;	/* next char to be sent to consoles */
++	unsigned long log_end;	/* most-recently-written-char + 1 */
++	unsigned long logged_chars;	/* #chars since last read+clear operation */
++
++	char log_buf[1024];
++};
++
++
++/* context sub struct */
++
++struct _vx_cvirt {
++//	int max_threads;		/* maximum allowed threads */
++	atomic_t nr_threads;		/* number of current threads */
++	atomic_t nr_running;		/* number of running threads */
++	atomic_t nr_uninterruptible;	/* number of uninterruptible threads */
++
++	atomic_t nr_onhold;		/* processes on hold */
++	uint32_t onhold_last;		/* jiffies when put on hold */
++
++	struct timeval bias_tv;		/* time offset to the host */
++	struct timespec bias_idle;
++	struct timespec bias_uptime;	/* context creation point */
++	uint64_t bias_clock;		/* offset in clock_t */
++
++	spinlock_t load_lock;		/* lock for the load averages */
++	atomic_t load_updates;		/* nr of load updates done so far */
++	uint32_t load_last;		/* last time load was calculated */
++	uint32_t load[3];		/* load averages 1,5,15 */
++
++	atomic_t total_forks;		/* number of forks so far */
++
++	struct _vx_syslog syslog;
++};
++
++struct _vx_cvirt_pc {
++	struct _vx_usage_stat cpustat;
++};
++
++
++#ifdef CONFIG_VSERVER_DEBUG
++
++static inline void __dump_vx_cvirt(struct _vx_cvirt *cvirt)
++{
++	printk("\t_vx_cvirt:\n");
++	printk("\t threads: %4d, %4d, %4d, %4d\n",
++		atomic_read(&cvirt->nr_threads),
++		atomic_read(&cvirt->nr_running),
++		atomic_read(&cvirt->nr_uninterruptible),
++		atomic_read(&cvirt->nr_onhold));
++	/* add rest here */
++	printk("\t total_forks = %d\n", atomic_read(&cvirt->total_forks));
++}
++
++#endif
++
++#endif	/* _VX_CVIRT_DEF_H */
+Index: linux-2.6.20/include/linux/vserver/debug.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vserver/debug.h
+@@ -0,0 +1,112 @@
++#ifndef _VX_DEBUG_H
++#define _VX_DEBUG_H
++
++
++#define VXD_CBIT(n,m)	(vx_debug_ ## n & (1 << (m)))
++#define VXD_CMIN(n,m)	(vx_debug_ ## n > (m))
++#define VXD_MASK(n,m)	(vx_debug_ ## n & (m))
++
++#define VXD_QPOS(v,p)	(((uint32_t)(v) >> ((p)*8)) & 0xFF)
++#define VXD_QUAD(v)	VXD_QPOS(v,0), VXD_QPOS(v,1),		\
++			VXD_QPOS(v,2), VXD_QPOS(v,3)
++#define VXF_QUAD	"%u.%u.%u.%u"
++
++#define VXD_DEV(d)	(d), (d)->bd_inode->i_ino,		\
++			imajor((d)->bd_inode), iminor((d)->bd_inode)
++#define VXF_DEV		"%p[%lu,%d:%d]"
++
++
++#define __FUNC__	__func__
++
++
++#ifdef	CONFIG_VSERVER_DEBUG
++
++extern unsigned int vx_debug_switch;
++extern unsigned int vx_debug_xid;
++extern unsigned int vx_debug_nid;
++extern unsigned int vx_debug_tag;
++extern unsigned int vx_debug_net;
++extern unsigned int vx_debug_limit;
++extern unsigned int vx_debug_cres;
++extern unsigned int vx_debug_dlim;
++extern unsigned int vx_debug_quota;
++extern unsigned int vx_debug_cvirt;
++extern unsigned int vx_debug_misc;
++
++
++#define VX_LOGLEVEL	"vxD: "
++#define VX_WARNLEVEL	KERN_WARNING "vxW: "
++
++#define vxdprintk(c,f,x...)					\
++	do {							\
++		if (c)						\
++			printk(VX_LOGLEVEL f "\n" , ##x);	\
++	} while (0)
++
++#define vxlprintk(c,f,x...)					\
++	do {							\
++		if (c)						\
++			printk(VX_LOGLEVEL f " @%s:%d\n", x);	\
++	} while (0)
++
++#define vxfprintk(c,f,x...)					\
++	do {							\
++		if (c)						\
++			printk(VX_LOGLEVEL f " %s@%s:%d\n", x); \
++	} while (0)
++
++
++#define vxwprintk(c,f,x...)					\
++	do {							\
++		if (c)						\
++			printk(VX_WARNLEVEL f "\n" , ##x);	\
++	} while (0)
++
++
++#define vxd_path(d,m)						\
++	({ static char _buffer[PATH_MAX];			\
++	   d_path((d), (m), _buffer, sizeof(_buffer)); })
++
++#define vxd_cond_path(n)					\
++	((n) ? vxd_path((n)->dentry, (n)->mnt) : "<null>" )
++
++
++struct vx_info;
++
++void dump_vx_info(struct vx_info *, int);
++void dump_vx_info_inactive(int);
++
++#else	/* CONFIG_VSERVER_DEBUG */
++
++#define vx_debug_switch 0
++#define vx_debug_xid	0
++#define vx_debug_nid	0
++#define vx_debug_tag	0
++#define vx_debug_net	0
++#define vx_debug_limit	0
++#define vx_debug_cres	0
++#define vx_debug_dlim	0
++#define vx_debug_cvirt	0
++
++#define vxdprintk(x...) do { } while (0)
++#define vxlprintk(x...) do { } while (0)
++#define vxfprintk(x...) do { } while (0)
++#define vxwprintk(x...) do { } while (0)
++
++#define vxd_path	"<none>"
++#define vxd_cond_path	vxd_path
++
++#endif	/* CONFIG_VSERVER_DEBUG */
++
++
++#ifdef	CONFIG_VSERVER_DEBUG
++#define vxd_assert_lock(l)	assert_spin_locked(l)
++#define vxd_assert(c,f,x...)	vxlprintk(!(c), \
++	"assertion [" f "] failed.", ##x, __FILE__, __LINE__)
++#else
++#define vxd_assert_lock(l)	do { } while (0)
++#define vxd_assert(c,f,x...)	do { } while (0)
++#endif
++
++
++#endif /* _VX_DEBUG_H */
+Index: linux-2.6.20/include/linux/vserver/debug_cmd.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vserver/debug_cmd.h
+@@ -0,0 +1,58 @@
++#ifndef _VX_DEBUG_CMD_H
++#define _VX_DEBUG_CMD_H
++
++
++/* debug commands */
++
++#define VCMD_dump_history	VC_CMD(DEBUG, 1, 0)
++
++#define VCMD_read_history	VC_CMD(DEBUG, 5, 0)
++#define VCMD_read_monitor	VC_CMD(DEBUG, 6, 0)
++
++struct  vcmd_read_history_v0 {
++	uint32_t index;
++	uint32_t count;
++	char __user *data;
++};
++
++struct  vcmd_read_monitor_v0 {
++	uint32_t index;
++	uint32_t count;
++	char __user *data;
++};
++
++
++#ifdef	__KERNEL__
++
++#ifdef	CONFIG_COMPAT
++
++#include <asm/compat.h>
++
++struct  vcmd_read_history_v0_x32 {
++	uint32_t index;
++	uint32_t count;
++	compat_uptr_t data_ptr;
++};
++
++struct  vcmd_read_monitor_v0_x32 {
++	uint32_t index;
++	uint32_t count;
++	compat_uptr_t data_ptr;
++};
++
++#endif  /* CONFIG_COMPAT */
++
++extern int vc_dump_history(uint32_t);
++
++extern int vc_read_history(uint32_t, void __user *);
++extern int vc_read_monitor(uint32_t, void __user *);
++
++#ifdef	CONFIG_COMPAT
++
++extern int vc_read_history_x32(uint32_t, void __user *);
++extern int vc_read_monitor_x32(uint32_t, void __user *);
++
++#endif  /* CONFIG_COMPAT */
++
++#endif	/* __KERNEL__ */
++#endif	/* _VX_DEBUG_CMD_H */
+Index: linux-2.6.20/include/linux/vserver/device.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vserver/device.h
+@@ -0,0 +1,13 @@
++#ifndef _VX_DEVICE_H
++#define _VX_DEVICE_H
++
++
++#define DATTR_CREATE	0x00000001
++#define DATTR_OPEN	0x00000002
++
++#define DATTR_REMAP	0x00000010
++
++
++#else	/* _VX_DEVICE_H */
++#warning duplicate inclusion
++#endif	/* _VX_DEVICE_H */
+Index: linux-2.6.20/include/linux/vserver/device_cmd.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vserver/device_cmd.h
+@@ -0,0 +1,41 @@
++#ifndef _VX_DEVICE_CMD_H
++#define _VX_DEVICE_CMD_H
++
++
++/*  device vserver commands */
++
++#define VCMD_set_mapping	VC_CMD(DEVICE, 1, 0)
++
++struct	vcmd_set_mapping_v0 {
++	const char __user *device;
++	const char __user *target;
++	uint32_t flags;
++};
++
++
++#ifdef	__KERNEL__
++
++#ifdef	CONFIG_COMPAT
++
++#include <asm/compat.h>
++
++struct	vcmd_set_mapping_v0_x32 {
++	compat_uptr_t device_ptr;
++	compat_uptr_t target_ptr;
++	uint32_t flags;
++};
++
++#endif	/* CONFIG_COMPAT */
++
++#include <linux/compiler.h>
++
++extern int vc_set_mapping(uint32_t, void __user *);
++
++#ifdef	CONFIG_COMPAT
++
++extern int vc_set_mapping_x32(uint32_t, void __user *);
++
++#endif	/* CONFIG_COMPAT */
++
++#endif	/* __KERNEL__ */
++#endif	/* _VX_DEVICE_CMD_H */
+Index: linux-2.6.20/include/linux/vserver/dlimit.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vserver/dlimit.h
+@@ -0,0 +1,53 @@
++#ifndef _VX_DLIMIT_H
++#define _VX_DLIMIT_H
++
++#include "switch.h"
++
++
++#ifdef	__KERNEL__
++
++/*      keep in sync with CDLIM_INFINITY	*/
++
++#define DLIM_INFINITY		(~0ULL)
++
++#include <linux/spinlock.h>
++
++struct super_block;
++
++struct dl_info {
++	struct hlist_node dl_hlist;		/* linked list of contexts */
++	struct rcu_head dl_rcu;			/* the rcu head */
++	tag_t dl_tag;				/* context tag */
++	atomic_t dl_usecnt;			/* usage count */
++	atomic_t dl_refcnt;			/* reference count */
++
++	struct super_block *dl_sb;		/* associated superblock */
++
++	spinlock_t dl_lock;			/* protect the values */
++
++	unsigned long long dl_space_used;	/* used space in bytes */
++	unsigned long long dl_space_total;	/* maximum space in bytes */
++	unsigned long dl_inodes_used;		/* used inodes */
++	unsigned long dl_inodes_total;		/* maximum inodes */
++
++	unsigned int dl_nrlmult;		/* non root limit mult */
++};
++
++struct rcu_head;
++
++extern void rcu_free_dl_info(struct rcu_head *);
++extern void unhash_dl_info(struct dl_info *);
++
++extern struct dl_info *locate_dl_info(struct super_block *, tag_t);
++
++
++struct kstatfs;
++
++extern void vx_vsi_statfs(struct super_block *, struct kstatfs *);
++
++typedef uint64_t dlsize_t;
++
++#endif	/* __KERNEL__ */
++#else	/* _VX_DLIMIT_H */
++#warning duplicate inclusion
++#endif	/* _VX_DLIMIT_H */
+Index: linux-2.6.20/include/linux/vserver/dlimit_cmd.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vserver/dlimit_cmd.h
+@@ -0,0 +1,74 @@
++#ifndef _VX_DLIMIT_CMD_H
++#define _VX_DLIMIT_CMD_H
++
++
++/*  dlimit vserver commands */
++
++#define VCMD_add_dlimit		VC_CMD(DLIMIT, 1, 0)
++#define VCMD_rem_dlimit		VC_CMD(DLIMIT, 2, 0)
++
++#define VCMD_set_dlimit		VC_CMD(DLIMIT, 5, 0)
++#define VCMD_get_dlimit		VC_CMD(DLIMIT, 6, 0)
++
++struct	vcmd_ctx_dlimit_base_v0 {
++	const char __user *name;
++	uint32_t flags;
++};
++
++struct	vcmd_ctx_dlimit_v0 {
++	const char __user *name;
++	uint32_t space_used;			/* used space in kbytes */
++	uint32_t space_total;			/* maximum space in kbytes */
++	uint32_t inodes_used;			/* used inodes */
++	uint32_t inodes_total;			/* maximum inodes */
++	uint32_t reserved;			/* reserved for root in % */
++	uint32_t flags;
++};
++
++#define CDLIM_UNSET		((uint32_t)0UL)
++#define CDLIM_INFINITY		((uint32_t)~0UL)
++#define CDLIM_KEEP		((uint32_t)~1UL)
++
++#ifdef	__KERNEL__
++
++#ifdef	CONFIG_COMPAT
++
++#include <asm/compat.h>
++
++struct	vcmd_ctx_dlimit_base_v0_x32 {
++	compat_uptr_t name_ptr;
++	uint32_t flags;
++};
++
++struct	vcmd_ctx_dlimit_v0_x32 {
++	compat_uptr_t name_ptr;
++	uint32_t space_used;			/* used space in kbytes */
++	uint32_t space_total;			/* maximum space in kbytes */
++	uint32_t inodes_used;			/* used inodes */
++	uint32_t inodes_total;			/* maximum inodes */
++	uint32_t reserved;			/* reserved for root in % */
++	uint32_t flags;
++};
++
++#endif	/* CONFIG_COMPAT */
++
++#include <linux/compiler.h>
++
++extern int vc_add_dlimit(uint32_t, void __user *);
++extern int vc_rem_dlimit(uint32_t, void __user *);
++
++extern int vc_set_dlimit(uint32_t, void __user *);
++extern int vc_get_dlimit(uint32_t, void __user *);
++
++#ifdef	CONFIG_COMPAT
++
++extern int vc_add_dlimit_x32(uint32_t, void __user *);
++extern int vc_rem_dlimit_x32(uint32_t, void __user *);
++
++extern int vc_set_dlimit_x32(uint32_t, void __user *);
++extern int vc_get_dlimit_x32(uint32_t, void __user *);
++
++#endif	/* CONFIG_COMPAT */
++
++#endif	/* __KERNEL__ */
++#endif	/* _VX_DLIMIT_CMD_H */
+Index: linux-2.6.20/include/linux/vserver/global.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vserver/global.h
+@@ -0,0 +1,18 @@
++#ifndef _VX_GLOBAL_H
++#define _VX_GLOBAL_H
++
++
++extern atomic_t vx_global_ctotal;
++extern atomic_t vx_global_cactive;
++
++extern atomic_t nx_global_ctotal;
++extern atomic_t nx_global_cactive;
++
++extern atomic_t vs_global_nsproxy;
++extern atomic_t vs_global_fs;
++extern atomic_t vs_global_mnt_ns;
++extern atomic_t vs_global_uts_ns;
++extern atomic_t vs_global_ipc_ns;
++
++
++#endif /* _VX_GLOBAL_H */
+Index: linux-2.6.20/include/linux/vserver/history.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vserver/history.h
+@@ -0,0 +1,197 @@
++#ifndef _VX_HISTORY_H
++#define _VX_HISTORY_H
++
++
++enum {
++	VXH_UNUSED=0,
++	VXH_THROW_OOPS=1,
++
++	VXH_GET_VX_INFO,
++	VXH_PUT_VX_INFO,
++	VXH_INIT_VX_INFO,
++	VXH_SET_VX_INFO,
++	VXH_CLR_VX_INFO,
++	VXH_CLAIM_VX_INFO,
++	VXH_RELEASE_VX_INFO,
++	VXH_ALLOC_VX_INFO,
++	VXH_DEALLOC_VX_INFO,
++	VXH_HASH_VX_INFO,
++	VXH_UNHASH_VX_INFO,
++	VXH_LOC_VX_INFO,
++	VXH_LOOKUP_VX_INFO,
++	VXH_CREATE_VX_INFO,
++};
++
++struct _vxhe_vxi {
++	struct vx_info *ptr;
++	unsigned xid;
++	unsigned usecnt;
++	unsigned tasks;
++};
++
++struct _vxhe_set_clr {
++	void *data;
++};
++
++struct _vxhe_loc_lookup {
++	unsigned arg;
++};
++
++struct _vx_hist_entry {
++	void *loc;
++	unsigned short seq;
++	unsigned short type;
++	struct _vxhe_vxi vxi;
++	union {
++		struct _vxhe_set_clr sc;
++		struct _vxhe_loc_lookup ll;
++	};
++};
++
++#ifdef	CONFIG_VSERVER_HISTORY
++
++extern unsigned volatile int vxh_active;
++
++struct _vx_hist_entry *vxh_advance(void *loc);
++
++
++static inline
++void	__vxh_copy_vxi(struct _vx_hist_entry *entry, struct vx_info *vxi)
++{
++	entry->vxi.ptr = vxi;
++	if (vxi) {
++		entry->vxi.usecnt = atomic_read(&vxi->vx_usecnt);
++		entry->vxi.tasks = atomic_read(&vxi->vx_tasks);
++		entry->vxi.xid = vxi->vx_id;
++	}
++}
++
++
++#define	__HERE__ current_text_addr()
++
++#define __VXH_BODY(__type, __data, __here)	\
++	struct _vx_hist_entry *entry;		\
++						\
++	preempt_disable();			\
++	entry = vxh_advance(__here);		\
++	__data;					\
++	entry->type = __type;			\
++	preempt_enable();
++
++
++	/* pass vxi only */
++
++#define __VXH_SMPL				\
++	__vxh_copy_vxi(entry, vxi)
++
++static inline
++void	__vxh_smpl(struct vx_info *vxi, int __type, void *__here)
++{
++	__VXH_BODY(__type, __VXH_SMPL, __here)
++}
++
++	/* pass vxi and data (void *) */
++
++#define __VXH_DATA				\
++	__vxh_copy_vxi(entry, vxi);		\
++	entry->sc.data = data
++
++static inline
++void	__vxh_data(struct vx_info *vxi, void *data,
++			int __type, void *__here)
++{
++	__VXH_BODY(__type, __VXH_DATA, __here)
++}
++
++	/* pass vxi and arg (long) */
++
++#define __VXH_LONG				\
++	__vxh_copy_vxi(entry, vxi);		\
++	entry->ll.arg = arg
++
++static inline
++void	__vxh_long(struct vx_info *vxi, long arg,
++			int __type, void *__here)
++{
++	__VXH_BODY(__type, __VXH_LONG, __here)
++}
++
++
++static inline
++void	__vxh_throw_oops(void *__here)
++{
++	__VXH_BODY(VXH_THROW_OOPS, {}, __here);
++	/* prevent further acquisition */
++	vxh_active = 0;
++}
++
++
++#define vxh_throw_oops()	__vxh_throw_oops(__HERE__);
++
++#define __vxh_get_vx_info(v,h)	__vxh_smpl(v, VXH_GET_VX_INFO, h);
++#define __vxh_put_vx_info(v,h)	__vxh_smpl(v, VXH_PUT_VX_INFO, h);
++
++#define __vxh_init_vx_info(v,d,h) \
++	__vxh_data(v,d, VXH_INIT_VX_INFO, h);
++#define __vxh_set_vx_info(v,d,h) \
++	__vxh_data(v,d, VXH_SET_VX_INFO, h);
++#define __vxh_clr_vx_info(v,d,h) \
++	__vxh_data(v,d, VXH_CLR_VX_INFO, h);
++
++#define __vxh_claim_vx_info(v,d,h) \
++	__vxh_data(v,d, VXH_CLAIM_VX_INFO, h);
++#define __vxh_release_vx_info(v,d,h) \
++	__vxh_data(v,d, VXH_RELEASE_VX_INFO, h);
++
++#define vxh_alloc_vx_info(v) \
++	__vxh_smpl(v, VXH_ALLOC_VX_INFO, __HERE__);
++#define vxh_dealloc_vx_info(v) \
++	__vxh_smpl(v, VXH_DEALLOC_VX_INFO, __HERE__);
++
++#define vxh_hash_vx_info(v) \
++	__vxh_smpl(v, VXH_HASH_VX_INFO, __HERE__);
++#define vxh_unhash_vx_info(v) \
++	__vxh_smpl(v, VXH_UNHASH_VX_INFO, __HERE__);
++
++#define vxh_loc_vx_info(v,l) \
++	__vxh_long(v,l, VXH_LOC_VX_INFO, __HERE__);
++#define vxh_lookup_vx_info(v,l) \
++	__vxh_long(v,l, VXH_LOOKUP_VX_INFO, __HERE__);
++#define vxh_create_vx_info(v,l) \
++	__vxh_long(v,l, VXH_CREATE_VX_INFO, __HERE__);
++
++extern void vxh_dump_history(void);
++
++
++#else  /* CONFIG_VSERVER_HISTORY */
++
++#define	__HERE__	0
++
++#define vxh_throw_oops()		do { } while (0)
++
++#define __vxh_get_vx_info(v,h)		do { } while (0)
++#define __vxh_put_vx_info(v,h)		do { } while (0)
++
++#define __vxh_init_vx_info(v,d,h)	do { } while (0)
++#define __vxh_set_vx_info(v,d,h)	do { } while (0)
++#define __vxh_clr_vx_info(v,d,h)	do { } while (0)
++
++#define __vxh_claim_vx_info(v,d,h)	do { } while (0)
++#define __vxh_release_vx_info(v,d,h)	do { } while (0)
++
++#define vxh_alloc_vx_info(v)		do { } while (0)
++#define vxh_dealloc_vx_info(v)		do { } while (0)
++
++#define vxh_hash_vx_info(v)		do { } while (0)
++#define vxh_unhash_vx_info(v)		do { } while (0)
++
++#define vxh_loc_vx_info(a,v)		do { } while (0)
++#define vxh_lookup_vx_info(a,v)		do { } while (0)
++#define vxh_create_vx_info(a,v)		do { } while (0)
++
++#define vxh_dump_history()		do { } while (0)
++
++
++#endif /* CONFIG_VSERVER_HISTORY */
++
++#endif /* _VX_HISTORY_H */
+Index: linux-2.6.20/include/linux/vserver/inode.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vserver/inode.h
+@@ -0,0 +1,38 @@
++#ifndef _VX_INODE_H
++#define _VX_INODE_H
++
++
++#define IATTR_TAG	0x01000000
++
++#define IATTR_ADMIN	0x00000001
++#define IATTR_WATCH	0x00000002
++#define IATTR_HIDE	0x00000004
++#define IATTR_FLAGS	0x00000007
++
++#define IATTR_BARRIER	0x00010000
++#define IATTR_IUNLINK	0x00020000
++#define IATTR_IMMUTABLE 0x00040000
++
++#ifdef	__KERNEL__
++
++
++#ifdef	CONFIG_VSERVER_PROC_SECURE
++#define IATTR_PROC_DEFAULT	( IATTR_ADMIN | IATTR_HIDE )
++#define IATTR_PROC_SYMLINK	( IATTR_ADMIN )
++#else
++#define IATTR_PROC_DEFAULT	( IATTR_ADMIN )
++#define IATTR_PROC_SYMLINK	( IATTR_ADMIN )
++#endif
++
++#define vx_hide_check(c,m)	(((m) & IATTR_HIDE) ? vx_check(c,m) : 1)
++
++#endif	/* __KERNEL__ */
++
++/* inode ioctls */
++
++#define FIOC_GETXFLG	_IOR('x', 5, long)
++#define FIOC_SETXFLG	_IOW('x', 6, long)
++
++#else	/* _VX_INODE_H */
++#warning duplicate inclusion
++#endif	/* _VX_INODE_H */
+Index: linux-2.6.20/include/linux/vserver/inode_cmd.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vserver/inode_cmd.h
+@@ -0,0 +1,61 @@
++#ifndef _VX_INODE_CMD_H
++#define _VX_INODE_CMD_H
++
++
++/*  inode vserver commands */
++
++#define VCMD_get_iattr_v0	VC_CMD(INODE, 1, 0)
++#define VCMD_set_iattr_v0	VC_CMD(INODE, 2, 0)
++
++#define VCMD_get_iattr		VC_CMD(INODE, 1, 1)
++#define VCMD_set_iattr		VC_CMD(INODE, 2, 1)
++
++struct	vcmd_ctx_iattr_v0 {
++	/* device handle in id */
++	uint64_t ino;
++	uint32_t xid;
++	uint32_t flags;
++	uint32_t mask;
++};
++
++struct	vcmd_ctx_iattr_v1 {
++	const char __user *name;
++	uint32_t xid;
++	uint32_t flags;
++	uint32_t mask;
++};
++
++
++#ifdef	__KERNEL__
++
++
++#ifdef	CONFIG_COMPAT
++
++#include <asm/compat.h>
++
++struct	vcmd_ctx_iattr_v1_x32 {
++	compat_uptr_t name_ptr;
++	uint32_t xid;
++	uint32_t flags;
++	uint32_t mask;
++};
++
++#endif	/* CONFIG_COMPAT */
++
++#include <linux/compiler.h>
++
++extern int vc_get_iattr_v0(uint32_t, void __user *);
++extern int vc_set_iattr_v0(uint32_t, void __user *);
++
++extern int vc_get_iattr(uint32_t, void __user *);
++extern int vc_set_iattr(uint32_t, void __user *);
++
++#ifdef	CONFIG_COMPAT
++
++extern int vc_get_iattr_x32(uint32_t, void __user *);
++extern int vc_set_iattr_x32(uint32_t, void __user *);
++
++#endif	/* CONFIG_COMPAT */
++
++#endif	/* __KERNEL__ */
++#endif	/* _VX_INODE_CMD_H */
+Index: linux-2.6.20/include/linux/vserver/limit.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vserver/limit.h
+@@ -0,0 +1,68 @@
++#ifndef _VX_LIMIT_H
++#define _VX_LIMIT_H
++
++
++#define VLIMIT_NSOCK	16
++#define VLIMIT_OPENFD	17
++#define VLIMIT_ANON	18
++#define VLIMIT_SHMEM	19
++#define VLIMIT_SEMARY	20
++#define VLIMIT_NSEMS	21
++#define VLIMIT_DENTRY	22
++#define VLIMIT_MAPPED	23
++
++
++#ifdef	__KERNEL__
++
++#define	VLIM_NOCHECK	((1L << VLIMIT_DENTRY) | (1L << RLIMIT_RSS))
++
++/*	keep in sync with CRLIM_INFINITY */
++
++#define	VLIM_INFINITY	(~0ULL)
++
++#ifndef RLIM_INFINITY
++#warning RLIM_INFINITY is undefined
++#endif
++
++#define __rlim_val(l,r,v)	((l)->res[(r)].v)
++
++#define __rlim_soft(l,r)	__rlim_val(l,r,soft)
++#define __rlim_hard(l,r)	__rlim_val(l,r,hard)
++
++#define __rlim_rcur(l,r)	__rlim_val(l,r,rcur)
++#define __rlim_rmin(l,r)	__rlim_val(l,r,rmin)
++#define __rlim_rmax(l,r)	__rlim_val(l,r,rmax)
++
++#define __rlim_lhit(l,r)	__rlim_val(l,r,lhit)
++#define __rlim_hit(l,r)		atomic_inc(&__rlim_lhit(l,r))
++
++typedef atomic_long_t rlim_atomic_t;
++typedef unsigned long rlim_t;
++
++#define __rlim_get(l,r)		atomic_long_read(&__rlim_rcur(l,r))
++#define __rlim_set(l,r,v)	atomic_long_set(&__rlim_rcur(l,r), v)
++#define __rlim_inc(l,r)		atomic_long_inc(&__rlim_rcur(l,r))
++#define __rlim_dec(l,r)		atomic_long_dec(&__rlim_rcur(l,r))
++#define __rlim_add(l,r,v)	atomic_long_add(v, &__rlim_rcur(l,r))
++#define __rlim_sub(l,r,v)	atomic_long_sub(v, &__rlim_rcur(l,r))
++
++
++#if	(RLIM_INFINITY == VLIM_INFINITY)
++#define	VX_VLIM(r) ((long long)(long)(r))
++#define	VX_RLIM(v) ((rlim_t)(v))
++#else
++#define	VX_VLIM(r) (((r) == RLIM_INFINITY) \
++		? VLIM_INFINITY : (long long)(r))
++#define	VX_RLIM(v) (((v) == VLIM_INFINITY) \
++		? RLIM_INFINITY : (rlim_t)(v))
++#endif
++
++struct sysinfo;
++
++void vx_vsi_meminfo(struct sysinfo *);
++void vx_vsi_swapinfo(struct sysinfo *);
++
++#define NUM_LIMITS	24
++
++#endif	/* __KERNEL__ */
++#endif	/* _VX_LIMIT_H */
+Index: linux-2.6.20/include/linux/vserver/limit_cmd.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vserver/limit_cmd.h
+@@ -0,0 +1,69 @@
++#ifndef _VX_LIMIT_CMD_H
++#define _VX_LIMIT_CMD_H
++
++
++/*  rlimit vserver commands */
++
++#define VCMD_get_rlimit		VC_CMD(RLIMIT, 1, 0)
++#define VCMD_set_rlimit		VC_CMD(RLIMIT, 2, 0)
++#define VCMD_get_rlimit_mask	VC_CMD(RLIMIT, 3, 0)
++#define VCMD_reset_minmax	VC_CMD(RLIMIT, 9, 0)
++
++struct	vcmd_ctx_rlimit_v0 {
++	uint32_t id;
++	uint64_t minimum;
++	uint64_t softlimit;
++	uint64_t maximum;
++};
++
++struct	vcmd_ctx_rlimit_mask_v0 {
++	uint32_t minimum;
++	uint32_t softlimit;
++	uint32_t maximum;
++};
++
++#define VCMD_rlimit_stat	VC_CMD(VSTAT, 1, 0)
++
++struct	vcmd_rlimit_stat_v0 {
++	uint32_t id;
++	uint32_t hits;
++	uint64_t value;
++	uint64_t minimum;
++	uint64_t maximum;
++};
++
++#define CRLIM_UNSET		(0ULL)
++#define CRLIM_INFINITY		(~0ULL)
++#define CRLIM_KEEP		(~1ULL)
++
++#ifdef	__KERNEL__
++
++#ifdef	CONFIG_IA32_EMULATION
++
++struct	vcmd_ctx_rlimit_v0_x32 {
++	uint32_t id;
++	uint64_t minimum;
++	uint64_t softlimit;
++	uint64_t maximum;
++} __attribute__ ((aligned (4)));
++
++#endif	/* CONFIG_IA32_EMULATION */
++
++#include <linux/compiler.h>
++
++extern int vc_get_rlimit_mask(uint32_t, void __user *);
++extern int vc_get_rlimit(struct vx_info *, void __user *);
++extern int vc_set_rlimit(struct vx_info *, void __user *);
++extern int vc_reset_minmax(struct vx_info *, void __user *);
++
++extern int vc_rlimit_stat(struct vx_info *, void __user *);
++
++#ifdef	CONFIG_IA32_EMULATION
++
++extern int vc_get_rlimit_x32(struct vx_info *, void __user *);
++extern int vc_set_rlimit_x32(struct vx_info *, void __user *);
++
++#endif	/* CONFIG_IA32_EMULATION */
++
++#endif	/* __KERNEL__ */
++#endif	/* _VX_LIMIT_CMD_H */
+Index: linux-2.6.20/include/linux/vserver/limit_def.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vserver/limit_def.h
+@@ -0,0 +1,47 @@
++#ifndef _VX_LIMIT_DEF_H
++#define _VX_LIMIT_DEF_H
++
++#include <asm/atomic.h>
++#include <asm/resource.h>
++
++#include "limit.h"
++
++
++struct _vx_res_limit {
++	rlim_t soft;		/* Context soft limit */
++	rlim_t hard;		/* Context hard limit */
++
++	rlim_atomic_t rcur;	/* Current value */
++	rlim_t rmin;		/* Context minimum */
++	rlim_t rmax;		/* Context maximum */
++
++	atomic_t lhit;		/* Limit hits */
++};
++
++/* context sub struct */
++
++struct _vx_limit {
++	struct _vx_res_limit res[NUM_LIMITS];
++};
++
++#ifdef CONFIG_VSERVER_DEBUG
++
++static inline void __dump_vx_limit(struct _vx_limit *limit)
++{
++	int i;
++
++	printk("\t_vx_limit:");
++	for (i=0; i<NUM_LIMITS; i++) {
++		printk("\t [%2d] = %8lu %8lu/%8lu, %8ld/%8ld, %8d\n",
++			i, (unsigned long)__rlim_get(limit, i),
++			(unsigned long)__rlim_rmin(limit, i),
++			(unsigned long)__rlim_rmax(limit, i),
++			(long)__rlim_soft(limit, i),
++			(long)__rlim_hard(limit, i),
++			atomic_read(&__rlim_lhit(limit, i)));
++	}
++}
++
++#endif
++
++#endif	/* _VX_LIMIT_DEF_H */
+Index: linux-2.6.20/include/linux/vserver/limit_int.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vserver/limit_int.h
+@@ -0,0 +1,198 @@
++#ifndef _VX_LIMIT_INT_H
++#define _VX_LIMIT_INT_H
++
++#include "context.h"
++
++#ifdef	__KERNEL__
++
++#define VXD_RCRES_COND(r)	VXD_CBIT(cres, (r))
++#define VXD_RLIMIT_COND(r)	VXD_CBIT(limit, (r))
++
++extern const char *vlimit_name[NUM_LIMITS];
++
++static inline void __vx_acc_cres(struct vx_info *vxi,
++	int res, int dir, void *_data, char *_file, int _line)
++{
++	if (VXD_RCRES_COND(res))
++		vxlprintk(1, "vx_acc_cres[%5d,%s,%2d]: %5ld%s (%p)",
++			(vxi ? vxi->vx_id : -1), vlimit_name[res], res,
++			(vxi ? (long)__rlim_get(&vxi->limit, res) : 0),
++			(dir > 0) ? "++" : "--", _data, _file, _line);
++	if (!vxi)
++		return;
++
++	if (dir > 0)
++		__rlim_inc(&vxi->limit, res);
++	else
++		__rlim_dec(&vxi->limit, res);
++}
++
++static inline void __vx_add_cres(struct vx_info *vxi,
++	int res, int amount, void *_data, char *_file, int _line)
++{
++	if (VXD_RCRES_COND(res))
++		vxlprintk(1, "vx_add_cres[%5d,%s,%2d]: %5ld += %5d (%p)",
++			(vxi ? vxi->vx_id : -1), vlimit_name[res], res,
++			(vxi ? (long)__rlim_get(&vxi->limit, res) : 0),
++			amount, _data, _file, _line);
++	if (amount == 0)
++		return;
++	if (!vxi)
++		return;
++	__rlim_add(&vxi->limit, res, amount);
++}
++
++static inline
++int __vx_cres_adjust_max(struct _vx_limit *limit, int res, rlim_t value)
++{
++	int cond = (value > __rlim_rmax(limit, res));
++
++	if (cond)
++		__rlim_rmax(limit, res) = value;
++	return cond;
++}
++
++static inline
++int __vx_cres_adjust_min(struct _vx_limit *limit, int res, rlim_t value)
++{
++	int cond = (value < __rlim_rmin(limit, res));
++
++	if (cond)
++		__rlim_rmin(limit, res) = value;
++	return cond;
++}
++
++static inline
++void __vx_cres_fixup(struct _vx_limit *limit, int res, rlim_t value)
++{
++	if (!__vx_cres_adjust_max(limit, res, value))
++		__vx_cres_adjust_min(limit, res, value);
++}
++
++
++/*	return values:
++	 +1 ... no limit hit
++	 -1 ... over soft limit
++	  0 ... over hard limit		*/
++
++static inline int __vx_cres_avail(struct vx_info *vxi,
++	int res, int num, char *_file, int _line)
++{
++	struct _vx_limit *limit;
++	rlim_t value;
++
++	if (VXD_RLIMIT_COND(res))
++		vxlprintk(1, "vx_cres_avail[%5d,%s,%2d]: %5ld/%5ld > %5ld + %5d",
++			(vxi ? vxi->vx_id : -1), vlimit_name[res], res,
++			(vxi ? (long)__rlim_soft(&vxi->limit, res) : -1),
++			(vxi ? (long)__rlim_hard(&vxi->limit, res) : -1),
++			(vxi ? (long)__rlim_get(&vxi->limit, res) : 0),
++			num, _file, _line);
++	if (!vxi)
++		return 1;
++
++	limit = &vxi->limit;
++	value = __rlim_get(limit, res);
++
++	if (!__vx_cres_adjust_max(limit, res, value))
++		__vx_cres_adjust_min(limit, res, value);
++
++	if (num == 0)
++		return 1;
++
++	if (__rlim_soft(limit, res) == RLIM_INFINITY)
++		return -1;
++	if (value + num <= __rlim_soft(limit, res))
++		return -1;
++
++	if (__rlim_hard(limit, res) == RLIM_INFINITY)
++		return 1;
++	if (value + num <= __rlim_hard(limit, res))
++		return 1;
++
++	__rlim_hit(limit, res);
++	return 0;
++}
++
++
++static const int VLA_RSS[] = { RLIMIT_RSS, VLIMIT_ANON, VLIMIT_MAPPED, 0 };
++
++static inline
++rlim_t __vx_cres_array_sum(struct _vx_limit *limit, const int *array)
++{
++	rlim_t value, sum = 0;
++	int res;
++
++	while ((res = *array++)) {
++		value = __rlim_get(limit, res);
++		__vx_cres_fixup(limit, res, value);
++		sum += value;
++	}
++	return sum;
++}
++
++static inline
++rlim_t __vx_cres_array_fixup(struct _vx_limit *limit, const int *array)
++{
++	rlim_t value = __vx_cres_array_sum(limit, array + 1);
++	int res = *array;
++
++	if (value == __rlim_get(limit, res))
++		return value;
++
++	__rlim_set(limit, res, value);
++	/* now adjust min/max */
++	if (!__vx_cres_adjust_max(limit, res, value))
++		__vx_cres_adjust_min(limit, res, value);
++
++	return value;
++}
++
++static inline int __vx_cres_array_avail(struct vx_info *vxi,
++	const int *array, int num, char *_file, int _line)
++{
++	struct _vx_limit *limit;
++	rlim_t value = 0;
++	int res;
++
++	if (num == 0)
++		return 1;
++	if (!vxi)
++		return 1;
++
++	limit = &vxi->limit;
++	res = *array;
++	value = __vx_cres_array_sum(limit, array+1);
++
++	__rlim_set(limit, res, value);
++	__vx_cres_fixup(limit, res, value);
++
++	return __vx_cres_avail(vxi, res, num, _file, _line);
++}
++
++
++static inline void vx_limit_fixup(struct _vx_limit *limit, int id)
++{
++	rlim_t value;
++	int res;
++
++	/* complex resources first */
++	if ((id < 0) || (id == RLIMIT_RSS))
++		__vx_cres_array_fixup(limit, VLA_RSS);
++
++	for (res=0; res<NUM_LIMITS; res++) {
++		if ((id > 0) && (res != id))
++			continue;
++
++		value = __rlim_get(limit, res);
++		__vx_cres_fixup(limit, res, value);
++
++		/* not supposed to happen, maybe warn? */
++		if (__rlim_rmax(limit, res) > __rlim_hard(limit, res))
++			__rlim_rmax(limit, res) = __rlim_hard(limit, res);
++	}
++}
++
++
++#endif	/* __KERNEL__ */
++#endif	/* _VX_LIMIT_INT_H */
+Index: linux-2.6.20/include/linux/vserver/monitor.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vserver/monitor.h
+@@ -0,0 +1,95 @@
++#ifndef _VX_MONITOR_H
++#define _VX_MONITOR_H
++
++
++enum {
++	VXM_UNUSED = 0,
++
++	VXM_SYNC = 0x10,
++
++	VXM_UPDATE = 0x20,
++	VXM_UPDATE_1,
++	VXM_UPDATE_2,
++
++	VXM_RQINFO_1 = 0x24,
++	VXM_RQINFO_2,
++
++	VXM_ACTIVATE = 0x40,
++	VXM_DEACTIVATE,
++	VXM_IDLE,
++
++	VXM_HOLD = 0x44,
++	VXM_UNHOLD,
++
++	VXM_MIGRATE = 0x48,
++	VXM_RESCHED,
++
++	/* all other bits are flags */
++	VXM_SCHED = 0x80,
++};
++
++struct _vxm_update_1 {
++	uint32_t tokens_max;
++	uint32_t fill_rate;
++	uint32_t interval;
++};
++
++struct _vxm_update_2 {
++	uint32_t tokens_min;
++	uint32_t fill_rate;
++	uint32_t interval;
++};
++
++struct _vxm_rqinfo_1 {
++	uint16_t running;
++	uint16_t onhold;
++	uint16_t iowait;
++	uint16_t uintr;
++	uint32_t idle_tokens;
++};
++
++struct _vxm_rqinfo_2 {
++	uint32_t norm_time;
++	uint32_t idle_time;
++	uint32_t idle_skip;
++};
++
++struct _vxm_sched {
++	uint32_t tokens;
++	uint32_t norm_time;
++	uint32_t idle_time;
++};
++
++struct _vxm_task {
++	uint16_t pid;
++	uint16_t state;
++};
++
++struct _vxm_event {
++	uint32_t jif;
++	union {
++		uint32_t seq;
++		uint32_t sec;
++	};
++	union {
++		uint32_t tokens;
++		uint32_t nsec;
++		struct _vxm_task tsk;
++	};
++};
++
++struct _vx_mon_entry {
++	uint16_t type;
++	uint16_t xid;
++	union {
++		struct _vxm_event ev;
++		struct _vxm_sched sd;
++		struct _vxm_update_1 u1;
++		struct _vxm_update_2 u2;
++		struct _vxm_rqinfo_1 q1;
++		struct _vxm_rqinfo_2 q2;
++	};
++};
++
++
++#endif /* _VX_MONITOR_H */
+Index: linux-2.6.20/include/linux/vserver/network.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vserver/network.h
+@@ -0,0 +1,99 @@
++#ifndef _VX_NETWORK_H
++#define _VX_NETWORK_H
++
++#include <linux/types.h>
++
++
++#define MAX_N_CONTEXT	65535	/* Arbitrary limit */
++
++#define NB_IPV4ROOT	16
++
++
++/* network flags */
++
++#define NXF_INFO_PRIVATE	0x00000008
++
++#define NXF_SINGLE_IP		0x00000100
++
++#define NXF_HIDE_NETIF		0x02000000
++
++#define NXF_STATE_SETUP		(1ULL<<32)
++#define NXF_STATE_ADMIN		(1ULL<<34)
++
++#define NXF_SC_HELPER		(1ULL<<36)
++#define NXF_PERSISTENT		(1ULL<<38)
++
++#define NXF_ONE_TIME		(0x0005ULL<<32)
++
++#define NXF_INIT_SET		(NXF_STATE_ADMIN)
++
++
++/* address types */
++
++#define NXA_TYPE_IPV4		0x0001
++#define NXA_TYPE_IPV6		0x0002
++
++#define NXA_MOD_BCAST		0x0100
++#define NXA_MOD_LBACK		0x0200
++
++#define NXA_TYPE_ANY		((uint16_t)-1)
++
++#define	NXA_TYPE_ADDR		0x0003
++#define NXA_TYPE_MASK		0x0013
++#define NXA_TYPE_RANGE		0x0023
++
++
++#ifdef	__KERNEL__
++
++#include <linux/list.h>
++#include <linux/spinlock.h>
++#include <linux/rcupdate.h>
++#include <asm/atomic.h>
++
++
++struct nx_info {
++	struct hlist_node nx_hlist;	/* linked list of nxinfos */
++	nid_t nx_id;			/* vnet id */
++	atomic_t nx_usecnt;		/* usage count */
++	atomic_t nx_tasks;		/* tasks count */
++	int nx_state;			/* context state */
++
++	uint64_t nx_flags;		/* network flag word */
++	uint64_t nx_ncaps;		/* network capabilities */
++
++	int nbipv4;
++	__be32 ipv4[NB_IPV4ROOT];	/* Process can only bind to these IPs */
++					/* The first one is used to connect */
++					/* and for bind any service */
++					/* The other must be used explicity */
++	__be32 mask[NB_IPV4ROOT];	/* Netmask for each ipv4 */
++					/* Used to select the proper source */
++					/* address for sockets */
++	__be32 v4_bcast;		/* Broadcast address to receive UDP  */
++	__be32 v4_lback;		/* Loopback address */
++
++	char nx_name[65];		/* network context name */
++};
++
++
++/* status flags */
++
++#define NXS_HASHED      0x0001
++#define NXS_SHUTDOWN    0x0100
++#define NXS_RELEASED    0x8000
++
++extern struct nx_info *lookup_nx_info(int);
++
++extern int get_nid_list(int, unsigned int *, int);
++extern int nid_is_hashed(nid_t);
++
++extern int nx_migrate_task(struct task_struct *, struct nx_info *);
++
++extern long vs_net_change(struct nx_info *, unsigned int);
++
++struct sock;
++
++#endif	/* __KERNEL__ */
++#else	/* _VX_NETWORK_H */
++#warning duplicate inclusion
++#endif	/* _VX_NETWORK_H */
+Index: linux-2.6.20/include/linux/vserver/network_cmd.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vserver/network_cmd.h
+@@ -0,0 +1,124 @@
++#ifndef _VX_NETWORK_CMD_H
++#define _VX_NETWORK_CMD_H
++
++
++/* vinfo commands */
++
++#define VCMD_task_nid		VC_CMD(VINFO, 2, 0)
++
++#ifdef	__KERNEL__
++extern int vc_task_nid(uint32_t, void __user *);
++
++#endif	/* __KERNEL__ */
++
++#define VCMD_nx_info		VC_CMD(VINFO, 6, 0)
++
++struct	vcmd_nx_info_v0 {
++	uint32_t nid;
++	/* more to come */
++};
++
++#ifdef	__KERNEL__
++extern int vc_nx_info(struct nx_info *, void __user *);
++
++#endif	/* __KERNEL__ */
++
++#include <linux/in.h>
++#include <linux/in6.h>
++
++#define VCMD_net_create_v0	VC_CMD(VNET, 1, 0)
++#define VCMD_net_create		VC_CMD(VNET, 1, 1)
++
++struct  vcmd_net_create {
++	uint64_t flagword;
++};
++
++#define VCMD_net_migrate	VC_CMD(NETMIG, 1, 0)
++
++#define VCMD_net_add		VC_CMD(NETALT, 1, 0)
++#define VCMD_net_remove		VC_CMD(NETALT, 2, 0)
++
++struct	vcmd_net_addr_v0 {
++	uint16_t type;
++	uint16_t count;
++	struct in_addr ip[4];
++	struct in_addr mask[4];
++	/* more to come */
++};
++
++#define VCMD_add_match_ipv4	VC_CMD(NETALT, 4, 0)
++#define VCMD_get_match_ipv4	VC_CMD(NETALT, 5, 0)
++
++struct	vcmd_match_ipv4_v0 {
++	uint16_t type;
++	uint16_t flags;
++	uint32_t parent;
++	uint32_t prefix;
++	struct in_addr ip;
++	struct in_addr ip2;
++	struct in_addr mask;
++};
++
++#define VCMD_add_match_ipv6	VC_CMD(NETALT, 6, 0)
++#define VCMD_get_match_ipv6	VC_CMD(NETALT, 7, 0)
++
++struct	vcmd_match_ipv6_v0 {
++	uint16_t type;
++	uint16_t flags;
++	uint32_t parent;
++	uint32_t prefix;
++	struct in6_addr ip;
++	struct in6_addr ip2;
++	struct in6_addr mask;
++};
++
++
++#ifdef	__KERNEL__
++extern int vc_net_create(uint32_t, void __user *);
++extern int vc_net_migrate(struct nx_info *, void __user *);
++
++extern int vc_net_add(struct nx_info *, void __user *);
++extern int vc_net_remove(struct nx_info *, void __user *);
++
++extern int vc_add_match_ipv4(struct nx_info *, void __user *);
++extern int vc_get_match_ipv4(struct nx_info *, void __user *);
++
++extern int vc_add_match_ipv6(struct nx_info *, void __user *);
++extern int vc_get_match_ipv6(struct nx_info *, void __user *);
++
++#endif	/* __KERNEL__ */
++
++
++/* flag commands */
++
++#define VCMD_get_nflags		VC_CMD(FLAGS, 5, 0)
++#define VCMD_set_nflags		VC_CMD(FLAGS, 6, 0)
++
++struct	vcmd_net_flags_v0 {
++	uint64_t flagword;
++	uint64_t mask;
++};
++
++#ifdef	__KERNEL__
++extern int vc_get_nflags(struct nx_info *, void __user *);
++extern int vc_set_nflags(struct nx_info *, void __user *);
++
++#endif	/* __KERNEL__ */
++
++
++/* network caps commands */
++
++#define VCMD_get_ncaps		VC_CMD(FLAGS, 7, 0)
++#define VCMD_set_ncaps		VC_CMD(FLAGS, 8, 0)
++
++struct	vcmd_net_caps_v0 {
++	uint64_t ncaps;
++	uint64_t cmask;
++};
++
++#ifdef	__KERNEL__
++extern int vc_get_ncaps(struct nx_info *, void __user *);
++extern int vc_set_ncaps(struct nx_info *, void __user *);
++
++#endif	/* __KERNEL__ */
++#endif	/* _VX_CONTEXT_CMD_H */
+Index: linux-2.6.20/include/linux/vserver/sched.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vserver/sched.h
+@@ -0,0 +1,26 @@
++#ifndef _VX_SCHED_H
++#define _VX_SCHED_H
++
++
++#ifdef	__KERNEL__
++
++struct timespec;
++
++void vx_vsi_uptime(struct timespec *, struct timespec *);
++
++
++struct vx_info;
++
++void vx_update_load(struct vx_info *);
++
++
++int vx_tokens_recalc(struct _vx_sched_pc *,
++	unsigned long *, unsigned long *, int [2]);
++
++void vx_update_sched_param(struct _vx_sched *sched,
++	struct _vx_sched_pc *sched_pc);
++
++#endif	/* __KERNEL__ */
++#else	/* _VX_SCHED_H */
++#warning duplicate inclusion
++#endif	/* _VX_SCHED_H */
+Index: linux-2.6.20/include/linux/vserver/sched_cmd.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vserver/sched_cmd.h
+@@ -0,0 +1,108 @@
++#ifndef _VX_SCHED_CMD_H
++#define _VX_SCHED_CMD_H
++
++
++/*  sched vserver commands */
++
++#define VCMD_set_sched_v2	VC_CMD(SCHED, 1, 2)
++#define VCMD_set_sched_v3	VC_CMD(SCHED, 1, 3)
++#define VCMD_set_sched_v4	VC_CMD(SCHED, 1, 4)
++
++struct	vcmd_set_sched_v2 {
++	int32_t fill_rate;
++	int32_t interval;
++	int32_t tokens;
++	int32_t tokens_min;
++	int32_t tokens_max;
++	uint64_t cpu_mask;
++};
++
++struct	vcmd_set_sched_v3 {
++	uint32_t set_mask;
++	int32_t fill_rate;
++	int32_t interval;
++	int32_t tokens;
++	int32_t tokens_min;
++	int32_t tokens_max;
++	int32_t priority_bias;
++};
++
++struct	vcmd_set_sched_v4 {
++	uint32_t set_mask;
++	int32_t fill_rate;
++	int32_t interval;
++	int32_t tokens;
++	int32_t tokens_min;
++	int32_t tokens_max;
++	int32_t prio_bias;
++	int32_t cpu_id;
++	int32_t bucket_id;
++};
++
++#define VCMD_set_sched		VC_CMD(SCHED, 1, 5)
++#define VCMD_get_sched		VC_CMD(SCHED, 2, 5)
++
++struct	vcmd_sched_v5 {
++	uint32_t mask;
++	int32_t cpu_id;
++	int32_t bucket_id;
++	int32_t fill_rate[2];
++	int32_t interval[2];
++	int32_t tokens;
++	int32_t tokens_min;
++	int32_t tokens_max;
++	int32_t prio_bias;
++};
++
++#define VXSM_FILL_RATE		0x0001
++#define VXSM_INTERVAL		0x0002
++#define VXSM_FILL_RATE2		0x0004
++#define VXSM_INTERVAL2		0x0008
++#define VXSM_TOKENS		0x0010
++#define VXSM_TOKENS_MIN		0x0020
++#define VXSM_TOKENS_MAX		0x0040
++#define VXSM_PRIO_BIAS		0x0100
++
++#define VXSM_IDLE_TIME		0x0200
++#define VXSM_FORCE		0x0400
++
++#define	VXSM_V3_MASK		0x0173
++#define	VXSM_SET_MASK		0x01FF
++
++#define VXSM_CPU_ID		0x1000
++#define VXSM_BUCKET_ID		0x2000
++
++#define VXSM_MSEC		0x4000
++
++#define SCHED_KEEP		(-2)	/* only for v2 */
++
++#ifdef	__KERNEL__
++
++#include <linux/compiler.h>
++
++extern int vc_set_sched_v2(struct vx_info *, void __user *);
++extern int vc_set_sched_v3(struct vx_info *, void __user *);
++extern int vc_set_sched_v4(struct vx_info *, void __user *);
++extern int vc_set_sched(struct vx_info *, void __user *);
++extern int vc_get_sched(struct vx_info *, void __user *);
++
++#endif	/* __KERNEL__ */
++
++#define VCMD_sched_info		VC_CMD(SCHED, 3, 0)
++
++struct	vcmd_sched_info {
++	int32_t cpu_id;
++	int32_t bucket_id;
++	uint64_t user_msec;
++	uint64_t sys_msec;
++	uint64_t hold_msec;
++	uint32_t token_usec;
++	int32_t vavavoom;
++};
++
++#ifdef	__KERNEL__
++
++extern int vc_sched_info(struct vx_info *, void __user *);
++
++#endif	/* __KERNEL__ */
++#endif	/* _VX_SCHED_CMD_H */
+Index: linux-2.6.20/include/linux/vserver/sched_def.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vserver/sched_def.h
+@@ -0,0 +1,68 @@
++#ifndef _VX_SCHED_DEF_H
++#define _VX_SCHED_DEF_H
++
++#include <linux/spinlock.h>
++#include <linux/jiffies.h>
++#include <linux/cpumask.h>
++#include <asm/atomic.h>
++#include <asm/param.h>
++
++
++/* context sub struct */
++
++struct _vx_sched {
++	spinlock_t tokens_lock;		/* lock for token bucket */
++
++	int tokens;			/* number of CPU tokens */
++	int fill_rate[2];		/* Fill rate: add X tokens... */
++	int interval[2];		/* Divisor:   per Y jiffies   */
++	int tokens_min;			/* Limit:     minimum for unhold */
++	int tokens_max;			/* Limit:     no more than N tokens */
++
++	int prio_bias;			/* bias offset for priority */
++
++	unsigned update_mask;		/* which features should be updated */
++	cpumask_t update;		/* CPUs which should update */
++};
++
++struct _vx_sched_pc {
++	int tokens;			/* number of CPU tokens */
++	int flags;			/* bucket flags */
++
++	int fill_rate[2];		/* Fill rate: add X tokens... */
++	int interval[2];		/* Divisor:   per Y jiffies   */
++	int tokens_min;			/* Limit:     minimum for unhold */
++	int tokens_max;			/* Limit:     no more than N tokens */
++
++	int prio_bias;			/* bias offset for priority */
++	int vavavoom;			/* last calculated vavavoom */
++
++	unsigned long norm_time;	/* last time accounted */
++	unsigned long idle_time;	/* non linear time for fair sched */
++	unsigned long token_time;	/* token time for accounting */
++	unsigned long onhold;		/* jiffies when put on hold */
++
++	uint64_t user_ticks;		/* token tick events */
++	uint64_t sys_ticks;		/* token tick events */
++	uint64_t hold_ticks;		/* token ticks paused */
++};
++
++
++#define VXSF_ONHOLD	0x0001
++#define VXSF_IDLE_TIME	0x0100
++
++#ifdef CONFIG_VSERVER_DEBUG
++
++static inline void __dump_vx_sched(struct _vx_sched *sched)
++{
++	printk("\t_vx_sched:\n");
++	printk("\t tokens: %4d/%4d, %4d/%4d, %4d, %4d\n",
++		sched->fill_rate[0], sched->interval[0],
++		sched->fill_rate[1], sched->interval[1],
++		sched->tokens_min, sched->tokens_max);
++	printk("\t priority = %4d\n", sched->prio_bias);
++}
++
++#endif
++
++#endif	/* _VX_SCHED_DEF_H */
+Index: linux-2.6.20/include/linux/vserver/signal.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vserver/signal.h
+@@ -0,0 +1,14 @@
++#ifndef _VX_SIGNAL_H
++#define _VX_SIGNAL_H
++
++
++#ifdef	__KERNEL__
++
++struct vx_info;
++
++int vx_info_kill(struct vx_info *, int, int);
++
++#endif	/* __KERNEL__ */
++#else	/* _VX_SIGNAL_H */
++#warning duplicate inclusion
++#endif	/* _VX_SIGNAL_H */
+Index: linux-2.6.20/include/linux/vserver/signal_cmd.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vserver/signal_cmd.h
+@@ -0,0 +1,43 @@
++#ifndef _VX_SIGNAL_CMD_H
++#define _VX_SIGNAL_CMD_H
++
++
++/*  signalling vserver commands */
++
++#define VCMD_ctx_kill		VC_CMD(PROCTRL, 1, 0)
++#define VCMD_wait_exit		VC_CMD(EVENT, 99, 0)
++
++struct	vcmd_ctx_kill_v0 {
++	int32_t pid;
++	int32_t sig;
++};
++
++struct	vcmd_wait_exit_v0 {
++	int32_t reboot_cmd;
++	int32_t exit_code;
++};
++
++#ifdef	__KERNEL__
++
++extern int vc_ctx_kill(struct vx_info *, void __user *);
++extern int vc_wait_exit(struct vx_info *, void __user *);
++
++#endif	/* __KERNEL__ */
++
++/*  process alteration commands */
++
++#define VCMD_get_pflags		VC_CMD(PROCALT, 5, 0)
++#define VCMD_set_pflags		VC_CMD(PROCALT, 6, 0)
++
++struct	vcmd_pflags_v0 {
++	uint32_t flagword;
++	uint32_t mask;
++};
++
++#ifdef	__KERNEL__
++
++extern int vc_get_pflags(uint32_t pid, void __user *);
++extern int vc_set_pflags(uint32_t pid, void __user *);
++
++#endif	/* __KERNEL__ */
++#endif	/* _VX_SIGNAL_CMD_H */
+Index: linux-2.6.20/include/linux/vserver/space.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vserver/space.h
+@@ -0,0 +1,13 @@
++#ifndef _VX_SPACE_H
++#define _VX_SPACE_H
++
++
++#include <linux/types.h>
++
++struct vx_info;
++
++int vx_set_space(struct vx_info *vxi, unsigned long mask);
++
++#else	/* _VX_SPACE_H */
++#warning duplicate inclusion
++#endif	/* _VX_SPACE_H */
+Index: linux-2.6.20/include/linux/vserver/space_cmd.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vserver/space_cmd.h
+@@ -0,0 +1,26 @@
++#ifndef _VX_SPACE_CMD_H
++#define _VX_SPACE_CMD_H
++
++
++#define VCMD_enter_space_v0	VC_CMD(PROCALT, 1, 0)
++#define VCMD_enter_space	VC_CMD(PROCALT, 1, 1)
++
++#define VCMD_set_space_v0	VC_CMD(PROCALT, 3, 0)
++#define VCMD_set_space		VC_CMD(PROCALT, 3, 1)
++
++#define VCMD_get_space_mask	VC_CMD(PROCALT, 4, 0)
++
++
++struct	vcmd_space_mask {
++	uint64_t mask;
++};
++
++
++#ifdef	__KERNEL__
++
++extern int vc_enter_space(struct vx_info *, void __user *);
++extern int vc_set_space(struct vx_info *, void __user *);
++extern int vc_get_space_mask(struct vx_info *, void __user *);
++
++#endif	/* __KERNEL__ */
++#endif	/* _VX_SPACE_CMD_H */
+Index: linux-2.6.20/include/linux/vserver/switch.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vserver/switch.h
+@@ -0,0 +1,97 @@
++#ifndef _VX_SWITCH_H
++#define _VX_SWITCH_H
++
++#include <linux/types.h>
++
++
++#define VC_CATEGORY(c)		(((c) >> 24) & 0x3F)
++#define VC_COMMAND(c)		(((c) >> 16) & 0xFF)
++#define VC_VERSION(c)		((c) & 0xFFF)
++
++#define VC_CMD(c,i,v)		((((VC_CAT_ ## c) & 0x3F) << 24) \
++				| (((i) & 0xFF) << 16) | ((v) & 0xFFF))
++
++/*
++
++  Syscall Matrix V2.8
++
++	 |VERSION|CREATE |MODIFY |MIGRATE|CONTROL|EXPERIM| |SPECIAL|SPECIAL|
++	 |STATS  |DESTROY|ALTER  |CHANGE |LIMIT  |TEST   | |       |       |
++	 |INFO   |SETUP  |       |MOVE   |       |       | |       |       |
++  -------+-------+-------+-------+-------+-------+-------+ +-------+-------+
++  SYSTEM |VERSION|VSETUP |VHOST  |       |       |       | |DEVICE |       |
++  HOST   |     00|     01|     02|     03|     04|     05| |     06|     07|
++  -------+-------+-------+-------+-------+-------+-------+ +-------+-------+
++  CPU    |       |VPROC  |PROCALT|PROCMIG|PROCTRL|       | |SCHED. |       |
++  PROCESS|     08|     09|     10|     11|     12|     13| |     14|     15|
++  -------+-------+-------+-------+-------+-------+-------+ +-------+-------+
++  MEMORY |       |       |       |       |       |       | |SWAP   |       |
++	 |     16|     17|     18|     19|     20|     21| |     22|     23|
++  -------+-------+-------+-------+-------+-------+-------+ +-------+-------+
++  NETWORK|       |VNET   |NETALT |NETMIG |NETCTL |       | |SERIAL |       |
++	 |     24|     25|     26|     27|     28|     29| |     30|     31|
++  -------+-------+-------+-------+-------+-------+-------+ +-------+-------+
++  DISK   |       |       |       |       |DLIMIT |       | |INODE  |       |
++  VFS    |     32|     33|     34|     35|     36|     37| |     38|     39|
++  -------+-------+-------+-------+-------+-------+-------+ +-------+-------+
++  OTHER  |VSTAT  |       |       |       |       |       | |VINFO  |       |
++	 |     40|     41|     42|     43|     44|     45| |     46|     47|
++  =======+=======+=======+=======+=======+=======+=======+ +=======+=======+
++  SPECIAL|EVENT  |       |       |       |FLAGS  |       | |       |       |
++	 |     48|     49|     50|     51|     52|     53| |     54|     55|
++  -------+-------+-------+-------+-------+-------+-------+ +-------+-------+
++  SPECIAL|DEBUG  |       |       |       |RLIMIT |SYSCALL| |       |COMPAT |
++	 |     56|     57|     58|     59|     60|TEST 61| |     62|     63|
++  -------+-------+-------+-------+-------+-------+-------+ +-------+-------+
++
++*/
++
++#define VC_CAT_VERSION		0
++
++#define VC_CAT_VSETUP		1
++#define VC_CAT_VHOST		2
++
++#define VC_CAT_DEVICE		6
++
++#define VC_CAT_VPROC		9
++#define VC_CAT_PROCALT		10
++#define VC_CAT_PROCMIG		11
++#define VC_CAT_PROCTRL		12
++
++#define VC_CAT_SCHED		14
++
++#define VC_CAT_VNET		25
++#define VC_CAT_NETALT		26
++#define VC_CAT_NETMIG		27
++#define VC_CAT_NETCTRL		28
++
++#define VC_CAT_DLIMIT		36
++#define VC_CAT_INODE		38
++
++#define VC_CAT_VSTAT		40
++#define VC_CAT_VINFO		46
++#define VC_CAT_EVENT		48
++
++#define VC_CAT_FLAGS		52
++#define VC_CAT_DEBUG		56
++#define VC_CAT_RLIMIT		60
++
++#define VC_CAT_SYSTEST		61
++#define VC_CAT_COMPAT		63
++
++/*  query version */
++
++#define VCMD_get_version	VC_CMD(VERSION, 0, 0)
++#define VCMD_get_vci		VC_CMD(VERSION, 1, 0)
++
++
++#ifdef	__KERNEL__
++
++#include <linux/errno.h>
++
++
++#else	/* __KERNEL__ */
++#define __user
++#endif	/* __KERNEL__ */
++
++#endif	/* _VX_SWITCH_H */
+Index: linux-2.6.20/include/linux/vserver/tag.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/linux/vserver/tag.h
+@@ -0,0 +1,153 @@
++#ifndef _DX_TAG_H
++#define _DX_TAG_H
++
++
++#define DX_TAG(in)	(IS_TAGGED(in))
++
++
++#ifdef CONFIG_DX_TAG_NFSD
++#define DX_TAG_NFSD	1
++#else
++#define DX_TAG_NFSD	0
++#endif
++
++
++#ifdef CONFIG_TAGGING_NONE
++
++#define MAX_UID		0xFFFFFFFF
++#define MAX_GID		0xFFFFFFFF
++
++#define INOTAG_TAG(cond, uid, gid, tag)	(0)
++
++#define TAGINO_UID(cond, uid, tag)	(uid)
++#define TAGINO_GID(cond, gid, tag)	(gid)
++
++#endif
++
++
++#ifdef CONFIG_TAGGING_GID16
++
++#define MAX_UID		0xFFFFFFFF
++#define MAX_GID		0x0000FFFF
++
++#define INOTAG_TAG(cond, uid, gid, tag)	\
++	((cond) ? (((gid) >> 16) & 0xFFFF) : 0)
++
++#define TAGINO_UID(cond, uid, tag)	(uid)
++#define TAGINO_GID(cond, gid, tag)	\
++	((cond) ? (((gid) & 0xFFFF) | ((tag) << 16)) : (gid))
++
++#endif
++
++
++#ifdef CONFIG_TAGGING_ID24
++
++#define MAX_UID		0x00FFFFFF
++#define MAX_GID		0x00FFFFFF
++
++#define INOTAG_TAG(cond, uid, gid, tag)	\
++	((cond) ? ((((uid) >> 16) & 0xFF00) | (((gid) >> 24) & 0xFF)) : 0)
++
++#define TAGINO_UID(cond, uid, tag)	\
++	((cond) ? (((uid) & 0xFFFFFF) | (((tag) & 0xFF00) << 16)) : (uid))
++#define TAGINO_GID(cond, gid, tag)	\
++	((cond) ? (((gid) & 0xFFFFFF) | (((tag) & 0x00FF) << 24)) : (gid))
++
++#endif
++
++
++#ifdef CONFIG_TAGGING_UID16
++
++#define MAX_UID		0x0000FFFF
++#define MAX_GID		0xFFFFFFFF
++
++#define INOTAG_TAG(cond, uid, gid, tag)	\
++	((cond) ? (((uid) >> 16) & 0xFFFF) : 0)
++
++#define TAGINO_UID(cond, uid, tag)	\
++	((cond) ? (((uid) & 0xFFFF) | ((tag) << 16)) : (uid))
++#define TAGINO_GID(cond, gid, tag)	(gid)
++
++#endif
++
++
++#ifdef CONFIG_TAGGING_INTERN
++
++#define MAX_UID		0xFFFFFFFF
++#define MAX_GID		0xFFFFFFFF
++
++#define INOTAG_TAG(cond, uid, gid, tag)	\
++	((cond) ? (tag) : 0)
++
++#define TAGINO_UID(cond, uid, tag)	(uid)
++#define TAGINO_GID(cond, gid, tag)	(gid)
++
++#endif
++
++
++#ifdef CONFIG_TAGGING_RUNTIME
++
++#define MAX_UID		0xFFFFFFFF
++#define MAX_GID		0xFFFFFFFF
++
++#define INOTAG_TAG(cond, uid, gid, tag)	(0)
++
++#define TAGINO_UID(cond, uid, tag)	(uid)
++#define TAGINO_GID(cond, gid, tag)	(gid)
++
++#endif
++
++
++#ifndef CONFIG_TAGGING_NONE
++#define dx_current_fstag(sb)	\
++	((sb)->s_flags & MS_TAGGED ? dx_current_tag(): 0)
++#else
++#define dx_current_fstag(sb)	(0)
++#endif
++
++#ifndef CONFIG_TAGGING_INTERN
++#define TAGINO_TAG(cond, tag)	(0)
++#else
++#define TAGINO_TAG(cond, tag)	((cond) ? (tag) : 0)
++#endif
++
++#define INOTAG_UID(cond, uid, gid)	\
++	((cond) ? ((uid) & MAX_UID) : (uid))
++#define INOTAG_GID(cond, uid, gid)	\
++	((cond) ? ((gid) & MAX_GID) : (gid))
++
++
++static inline uid_t dx_map_uid(uid_t uid)
++{
++	if ((uid > MAX_UID) && (uid != -1))
++		uid = -2;
++	return (uid & MAX_UID);
++}
++
++static inline gid_t dx_map_gid(gid_t gid)
++{
++	if ((gid > MAX_GID) && (gid != -1))
++		gid = -2;
++	return (gid & MAX_GID);
++}
++
++
++#ifdef	CONFIG_PROPAGATE
++
++int dx_parse_tag(char *string, tag_t *tag, int remove);
++
++void __dx_propagate_tag(struct nameidata *nd, struct inode *inode);
++
++#define dx_propagate_tag(n,i)	__dx_propagate_tag(n,i)
++
++#else
++#define dx_propagate_tag(n,i)	do { } while (0)
++#endif
++
++struct peer_tag {
++	int32_t xid;
++	int32_t nid;
++};
++
++
++#endif /* _DX_TAG_H */
+Index: linux-2.6.20/include/net/af_unix.h
+===================================================================
+--- linux-2.6.20.orig/include/net/af_unix.h
++++ linux-2.6.20/include/net/af_unix.h
+@@ -4,6 +4,7 @@
+ #include <linux/socket.h>
+ #include <linux/un.h>
+ #include <linux/mutex.h>
++#include <linux/vs_base.h>
+ #include <net/sock.h>
+ 
+ extern void unix_inflight(struct file *fp);
+@@ -17,9 +18,9 @@ extern spinlock_t unix_table_lock;
+ 
+ extern atomic_t unix_tot_inflight;
+ 
+-static inline struct sock *first_unix_socket(int *i)
++static inline struct sock *next_unix_socket_table(int *i)
+ {
+-	for (*i = 0; *i <= UNIX_HASH_SIZE; (*i)++) {
++	for ((*i)++; *i <= UNIX_HASH_SIZE; (*i)++) {
+ 		if (!hlist_empty(&unix_socket_table[*i]))
+ 			return __sk_head(&unix_socket_table[*i]);
+ 	}
+@@ -28,16 +29,19 @@ static inline struct sock *first_unix_so
+ 
+ static inline struct sock *next_unix_socket(int *i, struct sock *s)
+ {
+-	struct sock *next = sk_next(s);
+-	/* More in this chain? */
+-	if (next)
+-		return next;
+-	/* Look for next non-empty chain. */
+-	for ((*i)++; *i <= UNIX_HASH_SIZE; (*i)++) {
+-		if (!hlist_empty(&unix_socket_table[*i]))
+-			return __sk_head(&unix_socket_table[*i]);
+-	}
+-	return NULL;
++	do {
++		if (s)
++			s = sk_next(s);
++		if (!s)
++			s = next_unix_socket_table(i);
++	} while (s && !nx_check(s->sk_nid, VS_WATCH_P|VS_IDENT));
++	return s;
++}
++
++static inline struct sock *first_unix_socket(int *i)
++{
++	*i = 0;
++	return next_unix_socket(i, NULL);
+ }
+ 
+ #define forall_unix_sockets(i, s) \
+Index: linux-2.6.20/include/net/inet_hashtables.h
+===================================================================
+--- linux-2.6.20.orig/include/net/inet_hashtables.h
++++ linux-2.6.20/include/net/inet_hashtables.h
+@@ -271,6 +271,26 @@ static inline int inet_iif(const struct 
+ 	return ((struct rtable *)skb->dst)->rt_iif;
+ }
+ 
++/*
++ *      Check if a given address matches for an inet socket
++ *
++ *      nxi:	the socket's nx_info if any
++ *      addr:	to be verified address
++ *      saddr:	socket addresses
++ */
++static inline int inet_addr_match (
++	struct nx_info *nxi,
++	uint32_t addr,
++	uint32_t saddr)
++{
++	if (addr && (saddr == addr))
++		return 1;
++	if (!saddr)
++		return addr_in_nx_info(nxi, addr);
++	return 0;
++}
++
++
+ extern struct sock *__inet_lookup_listener(struct inet_hashinfo *hashinfo,
+ 					   const __be32 daddr,
+ 					   const unsigned short hnum,
+Index: linux-2.6.20/include/net/inet_sock.h
+===================================================================
+--- linux-2.6.20.orig/include/net/inet_sock.h
++++ linux-2.6.20/include/net/inet_sock.h
+@@ -112,6 +112,7 @@ struct inet_sock {
+ 	/* Socket demultiplex comparisons on incoming packets. */
+ 	__be32			daddr;
+ 	__be32			rcv_saddr;
++	__be32			rcv_saddr2;	/* Second bound ipv4 addr, for ipv4root */
+ 	__be16			dport;
+ 	__u16			num;
+ 	__be32			saddr;
+Index: linux-2.6.20/include/net/inet_timewait_sock.h
+===================================================================
+--- linux-2.6.20.orig/include/net/inet_timewait_sock.h
++++ linux-2.6.20/include/net/inet_timewait_sock.h
+@@ -115,6 +115,10 @@ struct inet_timewait_sock {
+ #define tw_refcnt		__tw_common.skc_refcnt
+ #define tw_hash			__tw_common.skc_hash
+ #define tw_prot			__tw_common.skc_prot
++#define tw_xid		__tw_common.skc_xid
++#define tw_vx_info		__tw_common.skc_vx_info
++#define tw_nid		__tw_common.skc_nid
++#define tw_nx_info		__tw_common.skc_nx_info
+ 	volatile unsigned char	tw_substate;
+ 	/* 3 bits hole, try to pack */
+ 	unsigned char		tw_rcv_wscale;
+Index: linux-2.6.20/include/net/route.h
+===================================================================
+--- linux-2.6.20.orig/include/net/route.h
++++ linux-2.6.20/include/net/route.h
+@@ -27,12 +27,16 @@
+ #include <net/dst.h>
+ #include <net/inetpeer.h>
+ #include <net/flow.h>
++#include <net/inet_sock.h>
+ #include <linux/in_route.h>
+ #include <linux/rtnetlink.h>
+ #include <linux/route.h>
+ #include <linux/ip.h>
+ #include <linux/cache.h>
+ #include <linux/security.h>
++#include <linux/vs_base.h>
++#include <linux/vs_inet.h>
++#include <linux/in.h>
+ 
+ #ifndef __KERNEL__
+ #warning This file is not supposed to be used outside of kernel.
+@@ -144,6 +148,8 @@ static inline char rt_tos2priority(u8 to
+ 	return ip_tos2prio[IPTOS_TOS(tos)>>1];
+ }
+ 
++#include "route_vs.h"
++
+ static inline int ip_route_connect(struct rtable **rp, __be32 dst,
+ 				   __be32 src, u32 tos, int oif, u8 protocol,
+ 				   __be16 sport, __be16 dport, struct sock *sk)
+@@ -158,7 +164,21 @@ static inline int ip_route_connect(struc
+ 					 .dport = dport } } };
+ 
+ 	int err;
+-	if (!dst || !src) {
++	struct nx_info *nx_info = current->nx_info;
++
++	if (sk)
++		nx_info = sk->sk_nx_info;
++
++	vxdprintk(VXD_CBIT(net, 4),
++		"ip_route_connect(%p) %p,%p;%lx",
++		sk, nx_info, sk->sk_socket,
++		(sk->sk_socket?sk->sk_socket->flags:0));
++
++	err = ip_find_src(nx_info, rp, &fl);
++	if (err)
++		return err;
++
++	if (!fl.fl4_dst || !fl.fl4_src) {
+ 		err = __ip_route_output_key(rp, &fl);
+ 		if (err)
+ 			return err;
+Index: linux-2.6.20/include/net/route_vs.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/include/net/route_vs.h
+@@ -0,0 +1,64 @@
++
++static inline int ip_find_src(struct nx_info *nxi, struct rtable **rp, struct flowi *fl)
++{
++	int err;
++	int i, n;
++	uint32_t ipv4root;
++
++	if (!nxi)
++		return 0;
++
++	ipv4root = nxi->ipv4[0];
++	if (ipv4root == 0)
++		return 0;
++
++	n = nxi->nbipv4;
++	if (fl->fl4_src == 0) {
++		if (n > 1) {
++			u32 foundsrc;
++
++			err = __ip_route_output_key(rp, fl);
++			if (err) {
++				fl->fl4_src = ipv4root;
++				err = __ip_route_output_key(rp, fl);
++			}
++			if (err)
++				return err;
++
++			foundsrc = (*rp)->rt_src;
++			ip_rt_put(*rp);
++
++			for (i=0; i<n; i++){
++				u32 mask = nxi->mask[i];
++				u32 ipv4 = nxi->ipv4[i];
++				u32 net4 = ipv4 & mask;
++
++				if (foundsrc == ipv4) {
++					fl->fl4_src = ipv4;
++					break;
++				}
++				if (!fl->fl4_src && (foundsrc & mask) == net4)
++					fl->fl4_src = ipv4;
++			}
++		}
++		if (fl->fl4_src == 0)
++			fl->fl4_src = (fl->fl4_dst == IPI_LOOPBACK)
++				? IPI_LOOPBACK : ipv4root;
++	} else {
++		for (i=0; i<n; i++) {
++			if (nxi->ipv4[i] == fl->fl4_src)
++				break;
++		}
++		if (i == n)
++			return -EPERM;
++	}
++
++	if (fl->fl4_dst == IPI_LOOPBACK && !nx_check(0, VS_ADMIN))
++		fl->fl4_dst = nxi->ipv4[0];
++#ifdef CONFIG_VSERVER_REMAP_SADDR
++	if (fl->fl4_src == IPI_LOOPBACK && !nx_check(0, VS_ADMIN))
++		fl->fl4_src = nxi->ipv4[0];
++#endif
++	return 0;
++}
++
+Index: linux-2.6.20/include/net/sock.h
+===================================================================
+--- linux-2.6.20.orig/include/net/sock.h
++++ linux-2.6.20/include/net/sock.h
+@@ -119,6 +119,10 @@ struct sock_common {
+ 	atomic_t		skc_refcnt;
+ 	unsigned int		skc_hash;
+ 	struct proto		*skc_prot;
++	xid_t			skc_xid;
++	struct vx_info		*skc_vx_info;
++	nid_t			skc_nid;
++	struct nx_info		*skc_nx_info;
+ };
+ 
+ /**
+@@ -195,6 +199,10 @@ struct sock {
+ #define sk_refcnt		__sk_common.skc_refcnt
+ #define sk_hash			__sk_common.skc_hash
+ #define sk_prot			__sk_common.skc_prot
++#define sk_xid			__sk_common.skc_xid
++#define sk_vx_info		__sk_common.skc_vx_info
++#define sk_nid			__sk_common.skc_nid
++#define sk_nx_info		__sk_common.skc_nx_info
+ 	unsigned char		sk_shutdown : 2,
+ 				sk_no_check : 2,
+ 				sk_userlocks : 4;
+Index: linux-2.6.20/init/Makefile
+===================================================================
+--- linux-2.6.20.orig/init/Makefile
++++ linux-2.6.20/init/Makefile
+@@ -15,6 +15,7 @@ clean-files := ../include/linux/compile.
+ 
+ # dependencies on generated files need to be listed explicitly
+ 
++$(obj)/main.o: include/linux/compile.h
+ $(obj)/version.o: include/linux/compile.h
+ 
+ # compile.h changes depending on hostname, generation number, etc,
+Index: linux-2.6.20/ipc/mqueue.c
+===================================================================
+--- linux-2.6.20.orig/ipc/mqueue.c
++++ linux-2.6.20/ipc/mqueue.c
+@@ -29,6 +29,8 @@
+ #include <linux/audit.h>
+ #include <linux/signal.h>
+ #include <linux/mutex.h>
++#include <linux/vs_context.h>
++#include <linux/vs_limit.h>
+ 
+ #include <net/sock.h>
+ #include "util.h"
+@@ -151,17 +153,20 @@ static struct inode *mqueue_get_inode(st
+ 			spin_lock(&mq_lock);
+ 			if (u->mq_bytes + mq_bytes < u->mq_bytes ||
+ 		 	    u->mq_bytes + mq_bytes >
+-			    p->signal->rlim[RLIMIT_MSGQUEUE].rlim_cur) {
++			    p->signal->rlim[RLIMIT_MSGQUEUE].rlim_cur ||
++			    !vx_ipcmsg_avail(p->vx_info, mq_bytes)) {
+ 				spin_unlock(&mq_lock);
+ 				goto out_inode;
+ 			}
+ 			u->mq_bytes += mq_bytes;
++			vx_ipcmsg_add(p->vx_info, u, mq_bytes);
+ 			spin_unlock(&mq_lock);
+ 
+ 			info->messages = kmalloc(mq_msg_tblsz, GFP_KERNEL);
+ 			if (!info->messages) {
+ 				spin_lock(&mq_lock);
+ 				u->mq_bytes -= mq_bytes;
++				vx_ipcmsg_sub(p->vx_info, u, mq_bytes);
+ 				spin_unlock(&mq_lock);
+ 				goto out_inode;
+ 			}
+@@ -259,10 +264,14 @@ static void mqueue_delete_inode(struct i
+ 		   (info->attr.mq_maxmsg * info->attr.mq_msgsize));
+ 	user = info->user;
+ 	if (user) {
++		struct vx_info *vxi = lookup_vx_info(user->xid);
++
+ 		spin_lock(&mq_lock);
+ 		user->mq_bytes -= mq_bytes;
++		vx_ipcmsg_sub(vxi, user, mq_bytes);
+ 		queues_count--;
+ 		spin_unlock(&mq_lock);
++		put_vx_info(vxi);
+ 		free_uid(user);
+ 	}
+ }
+@@ -747,7 +756,7 @@ asmlinkage long sys_mq_unlink(const char
+ 	if (inode)
+ 		atomic_inc(&inode->i_count);
+ 
+-	err = vfs_unlink(dentry->d_parent->d_inode, dentry);
++	err = vfs_unlink(dentry->d_parent->d_inode, dentry, NULL);
+ out_err:
+ 	dput(dentry);
+ 
+Index: linux-2.6.20/ipc/msg.c
+===================================================================
+--- linux-2.6.20.orig/ipc/msg.c
++++ linux-2.6.20/ipc/msg.c
+@@ -36,6 +36,7 @@
+ #include <linux/seq_file.h>
+ #include <linux/mutex.h>
+ #include <linux/nsproxy.h>
++#include <linux/vs_base.h>
+ 
+ #include <asm/current.h>
+ #include <asm/uaccess.h>
+@@ -149,6 +150,7 @@ static int newque (struct ipc_namespace 
+ 
+ 	msq->q_perm.mode = msgflg & S_IRWXUGO;
+ 	msq->q_perm.key = key;
++	msq->q_perm.xid = vx_current_xid();
+ 
+ 	msq->q_perm.security = NULL;
+ 	retval = security_msg_queue_alloc(msq);
+@@ -925,6 +927,9 @@ static int sysvipc_msg_proc_show(struct 
+ {
+ 	struct msg_queue *msq = it;
+ 
++	if (!vx_check(msq->q_perm.xid, VS_WATCH_P|VS_IDENT))
++		return 0;
++
+ 	return seq_printf(s,
+ 			"%10d %10d  %4o  %10lu %10lu %5u %5u %5u %5u %5u %5u %10lu %10lu %10lu\n",
+ 			msq->q_perm.key,
+Index: linux-2.6.20/ipc/sem.c
+===================================================================
+--- linux-2.6.20.orig/ipc/sem.c
++++ linux-2.6.20/ipc/sem.c
+@@ -83,6 +83,8 @@
+ #include <linux/seq_file.h>
+ #include <linux/mutex.h>
+ #include <linux/nsproxy.h>
++#include <linux/vs_base.h>
++#include <linux/vs_limit.h>
+ 
+ #include <asm/uaccess.h>
+ #include "util.h"
+@@ -230,6 +232,7 @@ static int newary (struct ipc_namespace 
+ 
+ 	sma->sem_perm.mode = (semflg & S_IRWXUGO);
+ 	sma->sem_perm.key = key;
++	sma->sem_perm.xid = vx_current_xid();
+ 
+ 	sma->sem_perm.security = NULL;
+ 	retval = security_sem_alloc(sma);
+@@ -245,6 +248,9 @@ static int newary (struct ipc_namespace 
+ 		return -ENOSPC;
+ 	}
+ 	ns->used_sems += nsems;
++	/* FIXME: obsoleted? */
++	vx_semary_inc(sma);
++	vx_nsems_add(sma, nsems);
+ 
+ 	sma->sem_id = sem_buildid(ns, id, sma->sem_perm.seq);
+ 	sma->sem_base = (struct sem *) &sma[1];
+@@ -526,6 +532,9 @@ static void freeary (struct ipc_namespac
+ 	sem_unlock(sma);
+ 
+ 	ns->used_sems -= sma->sem_nsems;
++	/* FIXME: obsoleted? */
++	vx_nsems_sub(sma, sma->sem_nsems);
++	vx_semary_dec(sma);
+ 	size = sizeof (*sma) + sma->sem_nsems * sizeof (struct sem);
+ 	security_sem_free(sma);
+ 	ipc_rcu_putref(sma);
+@@ -1402,6 +1411,9 @@ static int sysvipc_sem_proc_show(struct 
+ {
+ 	struct sem_array *sma = it;
+ 
++	if (!vx_check(sma->sem_perm.xid, VS_WATCH_P|VS_IDENT))
++		return 0;
++
+ 	return seq_printf(s,
+ 			  "%10d %10d  %4o %10lu %5u %5u %5u %5u %10lu %10lu\n",
+ 			  sma->sem_perm.key,
+Index: linux-2.6.20/ipc/shm.c
+===================================================================
+--- linux-2.6.20.orig/ipc/shm.c
++++ linux-2.6.20/ipc/shm.c
+@@ -37,6 +37,8 @@
+ #include <linux/seq_file.h>
+ #include <linux/mutex.h>
+ #include <linux/nsproxy.h>
++#include <linux/vs_context.h>
++#include <linux/vs_limit.h>
+ 
+ #include <asm/uaccess.h>
+ 
+@@ -181,7 +183,12 @@ static void shm_open(struct vm_area_stru
+  */
+ static void shm_destroy(struct ipc_namespace *ns, struct shmid_kernel *shp)
+ {
+-	ns->shm_tot -= (shp->shm_segsz + PAGE_SIZE - 1) >> PAGE_SHIFT;
++	struct vx_info *vxi = lookup_vx_info(shp->shm_perm.xid);
++	int numpages = (shp->shm_segsz + PAGE_SIZE - 1) >> PAGE_SHIFT;
++
++	vx_ipcshm_sub(vxi, shp, numpages);
++	ns->shm_tot -= numpages;
++
+ 	shm_rmid(ns, shp->id);
+ 	shm_unlock(shp);
+ 	if (!is_file_hugepages(shp->shm_file))
+@@ -191,6 +198,7 @@ static void shm_destroy(struct ipc_names
+ 						shp->mlock_user);
+ 	fput (shp->shm_file);
+ 	security_shm_free(shp);
++	put_vx_info(vxi);
+ 	ipc_rcu_putref(shp);
+ }
+ 
+@@ -282,11 +290,15 @@ static int newseg (struct ipc_namespace 
+ 	if (ns->shm_tot + numpages > ns->shm_ctlall)
+ 		return -ENOSPC;
+ 
++	if (!vx_ipcshm_avail(current->vx_info, numpages))
++		return -ENOSPC;
++
+ 	shp = ipc_rcu_alloc(sizeof(*shp));
+ 	if (!shp)
+ 		return -ENOMEM;
+ 
+ 	shp->shm_perm.key = key;
++	shp->shm_perm.xid = vx_current_xid();
+ 	shp->shm_perm.mode = (shmflg & S_IRWXUGO);
+ 	shp->mlock_user = NULL;
+ 
+@@ -339,6 +351,7 @@ static int newseg (struct ipc_namespace 
+ 		file->f_op = &shm_file_operations;
+ 
+ 	ns->shm_tot += numpages;
++	vx_ipcshm_add(current->vx_info, key, numpages);
+ 	shm_unlock(shp);
+ 	return shp->id;
+ 
+@@ -993,6 +1006,9 @@ static int sysvipc_shm_proc_show(struct 
+ #define SMALL_STRING "%10d %10d  %4o %10u %5u %5u  %5d %5u %5u %5u %5u %10lu %10lu %10lu\n"
+ #define BIG_STRING   "%10d %10d  %4o %21u %5u %5u  %5d %5u %5u %5u %5u %10lu %10lu %10lu\n"
+ 
++	if (!vx_check(shp->shm_perm.xid, VS_WATCH_P|VS_IDENT))
++		return 0;
++
+ 	if (sizeof(size_t) <= sizeof(int))
+ 		format = SMALL_STRING;
+ 	else
+Index: linux-2.6.20/ipc/util.c
+===================================================================
+--- linux-2.6.20.orig/ipc/util.c
++++ linux-2.6.20/ipc/util.c
+@@ -33,6 +33,8 @@
+ #include <linux/proc_fs.h>
+ #include <linux/audit.h>
+ #include <linux/nsproxy.h>
++#include <linux/vs_base.h>
++#include <linux/vserver/global.h>
+ 
+ #include <asm/unistd.h>
+ 
+@@ -73,6 +75,7 @@ static struct ipc_namespace *clone_ipc_n
+ 		goto err_shm;
+ 
+ 	kref_init(&ns->kref);
++	atomic_inc(&vs_global_ipc_ns);
+ 	return ns;
+ 
+ err_shm:
+@@ -142,6 +145,7 @@ void free_ipc_ns(struct kref *kref)
+ 	sem_exit_ns(ns);
+ 	msg_exit_ns(ns);
+ 	shm_exit_ns(ns);
++	atomic_dec(&vs_global_ipc_ns);
+ 	kfree(ns);
+ }
+ #endif
+@@ -261,7 +265,9 @@ int ipc_findkey(struct ipc_ids* ids, key
+ 	 */
+ 	for (id = 0; id <= max_id; id++) {
+ 		p = ids->entries->p[id];
+-		if(p==NULL)
++		if (p==NULL)
++			continue;
++		if (!vx_check(p->xid, VS_WATCH_P|VS_IDENT))
+ 			continue;
+ 		if (key == p->key)
+ 			return id;
+@@ -579,6 +585,9 @@ int ipcperms (struct kern_ipc_perm *ipcp
+ 
+ 	if (unlikely((err = audit_ipc_obj(ipcp))))
+ 		return err;
++
++	if (!vx_check(ipcp->xid, VS_WATCH_P|VS_IDENT)) /* maybe just VS_IDENT? */
++		return -1;
+ 	requested_mode = (flag >> 6) | (flag >> 3) | flag;
+ 	granted_mode = ipcp->mode;
+ 	if (current->euid == ipcp->cuid || current->euid == ipcp->uid)
+Index: linux-2.6.20/kernel/Makefile
+===================================================================
+--- linux-2.6.20.orig/kernel/Makefile
++++ linux-2.6.20/kernel/Makefile
+@@ -10,6 +10,8 @@ obj-y     = sched.o fork.o exec_domain.o
+ 	    kthread.o wait.o kfifo.o sys_ni.o posix-cpu-timers.o mutex.o \
+ 	    hrtimer.o rwsem.o latency.o nsproxy.o srcu.o
+ 
++obj-y	  += vserver/
++
+ obj-$(CONFIG_STACKTRACE) += stacktrace.o
+ obj-y += time/
+ obj-$(CONFIG_DEBUG_MUTEXES) += mutex-debug.o
+Index: linux-2.6.20/kernel/capability.c
+===================================================================
+--- linux-2.6.20.orig/kernel/capability.c
++++ linux-2.6.20/kernel/capability.c
+@@ -12,6 +12,7 @@
+ #include <linux/module.h>
+ #include <linux/security.h>
+ #include <linux/syscalls.h>
++#include <linux/vs_context.h>
+ #include <asm/uaccess.h>
+ 
+ unsigned securebits = SECUREBITS_DEFAULT; /* systemwide security settings */
+@@ -244,8 +245,12 @@ int __capable(struct task_struct *t, int
+ }
+ EXPORT_SYMBOL(__capable);
+ 
++#include <linux/vserver/base.h>
+ int capable(int cap)
+ {
++	/* here for now so we don't require task locking */
++	if (vs_check_bit(VXC_CAP_MASK, cap) && !vx_mcaps(1L << cap))
++		return 0;
+ 	return __capable(current, cap);
+ }
+ EXPORT_SYMBOL(capable);
+Index: linux-2.6.20/kernel/compat.c
+===================================================================
+--- linux-2.6.20.orig/kernel/compat.c
++++ linux-2.6.20/kernel/compat.c
+@@ -846,7 +846,7 @@ asmlinkage long compat_sys_time(compat_t
+ 	compat_time_t i;
+ 	struct timeval tv;
+ 
+-	do_gettimeofday(&tv);
++	vx_gettimeofday(&tv);
+ 	i = tv.tv_sec;
+ 
+ 	if (tloc) {
+@@ -870,7 +870,7 @@ asmlinkage long compat_sys_stime(compat_
+ 	if (err)
+ 		return err;
+ 
+-	do_settimeofday(&tv);
++	vx_settimeofday(&tv);
+ 	return 0;
+ }
+ 
+Index: linux-2.6.20/kernel/exit.c
+===================================================================
+--- linux-2.6.20.orig/kernel/exit.c
++++ linux-2.6.20/kernel/exit.c
+@@ -42,6 +42,11 @@
+ #include <linux/audit.h> /* for audit_free() */
+ #include <linux/resource.h>
+ #include <linux/blkdev.h>
++#include <linux/vs_limit.h>
++#include <linux/vs_context.h>
++#include <linux/vs_network.h>
++#include <linux/vs_pid.h>
++#include <linux/vserver/global.h>
+ 
+ #include <asm/uaccess.h>
+ #include <asm/unistd.h>
+@@ -433,9 +438,11 @@ static void close_files(struct files_str
+ 				struct file * file = xchg(&fdt->fd[i], NULL);
+ 				if (file)
+ 					filp_close(file, files);
++				vx_openfd_dec(i);
+ 			}
+ 			i++;
+ 			set >>= 1;
++			cond_resched();
+ 		}
+ 	}
+ }
+@@ -515,6 +522,7 @@ static inline void __put_fs_struct(struc
+ 			dput(fs->altroot);
+ 			mntput(fs->altrootmnt);
+ 		}
++		atomic_dec(&vs_global_fs);
+ 		kmem_cache_free(fs_cachep, fs);
+ 	}
+ }
+@@ -586,6 +594,14 @@ static void exit_mm(struct task_struct *
+ static inline void
+ choose_new_parent(struct task_struct *p, struct task_struct *reaper)
+ {
++	/* check for reaper context */
++	vxwprintk((p->xid != reaper->xid) && (reaper != child_reaper(p)),
++		"rogue reaper: %p[%d,#%u] <> %p[%d,#%u]",
++		p, p->pid, p->xid, reaper, reaper->pid, reaper->xid);
++
++	if (p == reaper)
++		reaper = vx_child_reaper(p);
++
+ 	/*
+ 	 * Make sure we're not reparenting to ourselves and that
+ 	 * the parent is not a zombie.
+@@ -677,7 +693,8 @@ forget_original_parent(struct task_struc
+ 	do {
+ 		reaper = next_thread(reaper);
+ 		if (reaper == father) {
+-			reaper = child_reaper(father);
++			// reaper = child_reaper(father);
++			reaper = vx_child_reaper(father);
+ 			break;
+ 		}
+ 	} while (reaper->exit_state);
+@@ -939,7 +956,11 @@ fastcall NORET_TYPE void do_exit(long co
+ 	tsk->exit_code = code;
+ 	proc_exit_connector(tsk);
+ 	exit_task_namespaces(tsk);
++	// ns = exit_task_namespaces_early(tsk);
++	/* needs to stay before exit_notify() */
++	exit_vx_info_early(tsk, code);
+ 	exit_notify(tsk);
++	// exit_task_namespaces(tsk, ns);
+ #ifdef CONFIG_NUMA
+ 	mpol_free(tsk->mempolicy);
+ 	tsk->mempolicy = NULL;
+@@ -963,6 +984,10 @@ fastcall NORET_TYPE void do_exit(long co
+ 	if (tsk->splice_pipe)
+ 		__free_pipe_info(tsk->splice_pipe);
+ 
++	/* needs to stay after exit_notify() */
++	exit_vx_info(tsk, code);
++	exit_nx_info(tsk);
++
+ 	preempt_disable();
+ 	/* causes final put_task_struct in finish_task_switch(). */
+ 	tsk->state = TASK_DEAD;
+Index: linux-2.6.20/kernel/fork.c
+===================================================================
+--- linux-2.6.20.orig/kernel/fork.c
++++ linux-2.6.20/kernel/fork.c
+@@ -49,6 +49,11 @@
+ #include <linux/delayacct.h>
+ #include <linux/taskstats_kern.h>
+ #include <linux/random.h>
++#include <linux/vs_context.h>
++#include <linux/vs_network.h>
++#include <linux/vs_limit.h>
++#include <linux/vs_memory.h>
++#include <linux/vserver/global.h>
+ 
+ #include <asm/pgtable.h>
+ #include <asm/pgalloc.h>
+@@ -109,6 +114,8 @@ void free_task(struct task_struct *tsk)
+ {
+ 	free_thread_info(tsk->thread_info);
+ 	rt_mutex_debug_task_free(tsk);
++	clr_vx_info(&tsk->vx_info);
++	clr_nx_info(&tsk->nx_info);
+ 	free_task_struct(tsk);
+ }
+ EXPORT_SYMBOL(free_task);
+@@ -216,6 +223,8 @@ static inline int dup_mmap(struct mm_str
+ 	mm->free_area_cache = oldmm->mmap_base;
+ 	mm->cached_hole_size = ~0UL;
+ 	mm->map_count = 0;
++	__set_mm_counter(mm, file_rss, 0);
++	__set_mm_counter(mm, anon_rss, 0);
+ 	cpus_clear(mm->cpu_vm_mask);
+ 	mm->mm_rb = RB_ROOT;
+ 	rb_link = &mm->mm_rb.rb_node;
+@@ -227,7 +236,7 @@ static inline int dup_mmap(struct mm_str
+ 
+ 		if (mpnt->vm_flags & VM_DONTCOPY) {
+ 			long pages = vma_pages(mpnt);
+-			mm->total_vm -= pages;
++			vx_vmpages_sub(mm, pages);
+ 			vm_stat_account(mm, mpnt->vm_flags, mpnt->vm_file,
+ 								-pages);
+ 			continue;
+@@ -334,8 +343,6 @@ static struct mm_struct * mm_init(struct
+ 	INIT_LIST_HEAD(&mm->mmlist);
+ 	mm->core_waiters = 0;
+ 	mm->nr_ptes = 0;
+-	set_mm_counter(mm, file_rss, 0);
+-	set_mm_counter(mm, anon_rss, 0);
+ 	spin_lock_init(&mm->page_table_lock);
+ 	rwlock_init(&mm->ioctx_list_lock);
+ 	mm->ioctx_list = NULL;
+@@ -344,6 +351,7 @@ static struct mm_struct * mm_init(struct
+ 
+ 	if (likely(!mm_alloc_pgd(mm))) {
+ 		mm->def_flags = 0;
++		set_vx_info(&mm->mm_vx_info, current->vx_info);
+ 		return mm;
+ 	}
+ 	free_mm(mm);
+@@ -375,6 +383,7 @@ void fastcall __mmdrop(struct mm_struct 
+ 	BUG_ON(mm == &init_mm);
+ 	mm_free_pgd(mm);
+ 	destroy_context(mm);
++	clr_vx_info(&mm->mm_vx_info);
+ 	free_mm(mm);
+ }
+ 
+@@ -523,6 +532,7 @@ static struct mm_struct *dup_mm(struct t
+ 		goto fail_nomem;
+ 
+ 	memcpy(mm, oldmm, sizeof(*mm));
++	mm->mm_vx_info = NULL;
+ 
+ 	/* Initializing for Swap token stuff */
+ 	mm->token_priority = 0;
+@@ -554,6 +564,7 @@ fail_nocontext:
+ 	 * If init_new_context() failed, we cannot use mmput() to free the mm
+ 	 * because it calls destroy_context()
+ 	 */
++	clr_vx_info(&mm->mm_vx_info);
+ 	mm_free_pgd(mm);
+ 	free_mm(mm);
+ 	return NULL;
+@@ -624,6 +635,7 @@ static inline struct fs_struct *__copy_f
+ 			fs->altroot = NULL;
+ 		}
+ 		read_unlock(&old->lock);
++		atomic_inc(&vs_global_fs);
+ 	}
+ 	return fs;
+ }
+@@ -742,6 +754,8 @@ static struct files_struct *dup_fd(struc
+ 		struct file *f = *old_fds++;
+ 		if (f) {
+ 			get_file(f);
++			/* TODO: sum it first for check and performance */
++			vx_openfd_inc(open_files - i);
+ 		} else {
+ 			/*
+ 			 * The fd may be claimed in the fd bitmap but not yet
+@@ -993,6 +1007,8 @@ static struct task_struct *copy_process(
+ {
+ 	int retval;
+ 	struct task_struct *p = NULL;
++	struct vx_info *vxi;
++	struct nx_info *nxi;
+ 
+ 	if ((clone_flags & (CLONE_NEWNS|CLONE_FS)) == (CLONE_NEWNS|CLONE_FS))
+ 		return ERR_PTR(-EINVAL);
+@@ -1027,12 +1043,30 @@ static struct task_struct *copy_process(
+ 	DEBUG_LOCKS_WARN_ON(!p->hardirqs_enabled);
+ 	DEBUG_LOCKS_WARN_ON(!p->softirqs_enabled);
+ #endif
++	init_vx_info(&p->vx_info, current->vx_info);
++	init_nx_info(&p->nx_info, current->nx_info);
++
++	/* check vserver memory */
++	if (p->mm && !(clone_flags & CLONE_VM)) {
++		if (vx_vmpages_avail(p->mm, p->mm->total_vm))
++			vx_pages_add(p->vx_info, RLIMIT_AS, p->mm->total_vm);
++		else
++			goto bad_fork_free;
++	}
++	if (p->mm && vx_flags(VXF_FORK_RSS, 0)) {
++		if (!vx_rss_avail(p->mm, get_mm_counter(p->mm, file_rss)))
++			goto bad_fork_cleanup_vm;
++	}
++
+ 	retval = -EAGAIN;
++	if (!vx_nproc_avail(1))
++		goto bad_fork_cleanup_vm;
++
+ 	if (atomic_read(&p->user->processes) >=
+ 			p->signal->rlim[RLIMIT_NPROC].rlim_cur) {
+ 		if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RESOURCE) &&
+ 				p->user != &root_user)
+-			goto bad_fork_free;
++			goto bad_fork_cleanup_vm;
+ 	}
+ 
+ 	atomic_inc(&p->user->__count);
+@@ -1295,6 +1329,18 @@ static struct task_struct *copy_process(
+ 
+ 	total_forks++;
+ 	spin_unlock(&current->sighand->siglock);
++
++	/* p is copy of current */
++	vxi = p->vx_info;
++	if (vxi) {
++		claim_vx_info(vxi, p);
++		atomic_inc(&vxi->cvirt.nr_threads);
++		atomic_inc(&vxi->cvirt.total_forks);
++		vx_nproc_inc(p);
++	}
++	nxi = p->nx_info;
++	if (nxi)
++		claim_nx_info(nxi, p);
+ 	write_unlock_irq(&tasklist_lock);
+ 	proc_fork_connector(p);
+ 	return p;
+@@ -1336,6 +1382,9 @@ bad_fork_cleanup_count:
+ 	put_group_info(p->group_info);
+ 	atomic_dec(&p->user->processes);
+ 	free_uid(p->user);
++bad_fork_cleanup_vm:
++	if (p->mm && !(clone_flags & CLONE_VM))
++		vx_pages_sub(p->vx_info, RLIMIT_AS, p->mm->total_vm);
+ bad_fork_free:
+ 	free_task(p);
+ fork_out:
+@@ -1396,6 +1445,15 @@ long do_fork(unsigned long clone_flags,
+ 
+ 	if (!pid)
+ 		return -EAGAIN;
++
++	/* kernel threads are host only */
++	if ((clone_flags & CLONE_KTHREAD) && !vx_check(0, VS_ADMIN)) {
++		vxwprintk(1, "xid=%d tried to spawn a kernel thread.",
++			vx_current_xid());
++		free_pid(pid);
++		return -EPERM;
++	}
++
+ 	nr = pid->nr;
+ 	if (unlikely(current->ptrace)) {
+ 		trace = fork_traceflag (clone_flags);
+Index: linux-2.6.20/kernel/kthread.c
+===================================================================
+--- linux-2.6.20.orig/kernel/kthread.c
++++ linux-2.6.20/kernel/kthread.c
+@@ -126,7 +126,7 @@ static void keventd_create_kthread(struc
+ 	} else {
+ 		wait_for_completion(&create->started);
+ 		read_lock(&tasklist_lock);
+-		create->result = find_task_by_pid(pid);
++		create->result = find_task_by_real_pid(pid);
+ 		read_unlock(&tasklist_lock);
+ 	}
+ 	complete(&create->done);
+Index: linux-2.6.20/kernel/nsproxy.c
+===================================================================
+--- linux-2.6.20.orig/kernel/nsproxy.c
++++ linux-2.6.20/kernel/nsproxy.c
+@@ -20,14 +20,10 @@
+ #include <linux/mnt_namespace.h>
+ #include <linux/utsname.h>
+ #include <linux/pid_namespace.h>
++#include <linux/vserver/global.h>
+ 
+ struct nsproxy init_nsproxy = INIT_NSPROXY(init_nsproxy);
+ 
+-static inline void get_nsproxy(struct nsproxy *ns)
+-{
+-	atomic_inc(&ns->count);
+-}
+-
+ void get_task_namespaces(struct task_struct *tsk)
+ {
+ 	struct nsproxy *ns = tsk->nsproxy;
+@@ -48,6 +44,7 @@ static inline struct nsproxy *clone_name
+ 	ns = kmemdup(orig, sizeof(struct nsproxy), GFP_KERNEL);
+ 	if (ns)
+ 		atomic_set(&ns->count, 1);
++	atomic_inc(&vs_global_nsproxy);
+ 	return ns;
+ }
+ 
+@@ -70,7 +67,6 @@ struct nsproxy *dup_namespaces(struct ns
+ 		if (ns->pid_ns)
+ 			get_pid_ns(ns->pid_ns);
+ 	}
+-
+ 	return ns;
+ }
+ 
+@@ -145,5 +141,6 @@ void free_nsproxy(struct nsproxy *ns)
+ 		put_ipc_ns(ns->ipc_ns);
+ 	if (ns->pid_ns)
+ 		put_pid_ns(ns->pid_ns);
++	atomic_dec(&vs_global_nsproxy);
+ 	kfree(ns);
+ }
+Index: linux-2.6.20/kernel/pid.c
+===================================================================
+--- linux-2.6.20.orig/kernel/pid.c
++++ linux-2.6.20/kernel/pid.c
+@@ -27,6 +27,7 @@
+ #include <linux/bootmem.h>
+ #include <linux/hash.h>
+ #include <linux/pid_namespace.h>
++#include <linux/vs_pid.h>
+ 
+ #define pid_hashfn(nr) hash_long((unsigned long)nr, pidhash_shift)
+ static struct hlist_head *pid_hash;
+@@ -290,6 +291,9 @@ void fastcall transfer_pid(struct task_s
+ struct task_struct * fastcall pid_task(struct pid *pid, enum pid_type type)
+ {
+ 	struct task_struct *result = NULL;
++
++	if (type == PIDTYPE_REALPID)
++		type = PIDTYPE_PID;
+ 	if (pid) {
+ 		struct hlist_node *first;
+ 		first = rcu_dereference(pid->tasks[type].first);
+@@ -304,7 +308,17 @@ struct task_struct * fastcall pid_task(s
+  */
+ struct task_struct *find_task_by_pid_type(int type, int nr)
+ {
+-	return pid_task(find_pid(nr), type);
++	struct task_struct *task;
++
++	if (type == PIDTYPE_PID)
++		nr = vx_rmap_pid(nr);
++
++	task = pid_task(find_pid(nr), type);
++	if (task && (type != PIDTYPE_REALPID) &&
++		/* maybe VS_WATCH_P in the future? */
++		!vx_check(task->xid, VS_WATCH|VS_IDENT))
++		return NULL;
++	return task;
+ }
+ 
+ EXPORT_SYMBOL(find_task_by_pid_type);
+Index: linux-2.6.20/kernel/posix-timers.c
+===================================================================
+--- linux-2.6.20.orig/kernel/posix-timers.c
++++ linux-2.6.20/kernel/posix-timers.c
+@@ -48,6 +48,7 @@
+ #include <linux/wait.h>
+ #include <linux/workqueue.h>
+ #include <linux/module.h>
++#include <linux/vs_context.h>
+ 
+ /*
+  * Management arrays for POSIX timers.	 Timers are kept in slab memory
+@@ -298,6 +299,10 @@ void do_schedule_next_timer(struct sigin
+ 
+ int posix_timer_event(struct k_itimer *timr,int si_private)
+ {
++	struct vx_info_save vxis;
++	int ret;
++
++	enter_vx_info(task_get_vx_info(timr->it_process), &vxis);
+ 	memset(&timr->sigq->info, 0, sizeof(siginfo_t));
+ 	timr->sigq->info.si_sys_private = si_private;
+ 	/* Send signal to the process that owns this timer.*/
+@@ -310,11 +315,11 @@ int posix_timer_event(struct k_itimer *t
+ 
+ 	if (timr->it_sigev_notify & SIGEV_THREAD_ID) {
+ 		struct task_struct *leader;
+-		int ret = send_sigqueue(timr->it_sigev_signo, timr->sigq,
+-					timr->it_process);
+ 
++		ret = send_sigqueue(timr->it_sigev_signo, timr->sigq,
++				    timr->it_process);
+ 		if (likely(ret >= 0))
+-			return ret;
++			goto out;
+ 
+ 		timr->it_sigev_notify = SIGEV_SIGNAL;
+ 		leader = timr->it_process->group_leader;
+@@ -322,8 +327,12 @@ int posix_timer_event(struct k_itimer *t
+ 		timr->it_process = leader;
+ 	}
+ 
+-	return send_group_sigqueue(timr->it_sigev_signo, timr->sigq,
+-				   timr->it_process);
++	ret = send_group_sigqueue(timr->it_sigev_signo, timr->sigq,
++				  timr->it_process);
++out:
++	leave_vx_info(&vxis);
++	put_vx_info(vxis.vxi);
++	return ret;
+ }
+ EXPORT_SYMBOL_GPL(posix_timer_event);
+ 
+@@ -372,7 +381,7 @@ static struct task_struct * good_sigeven
+ 	struct task_struct *rtn = current->group_leader;
+ 
+ 	if ((event->sigev_notify & SIGEV_THREAD_ID ) &&
+-		(!(rtn = find_task_by_pid(event->sigev_notify_thread_id)) ||
++		(!(rtn = find_task_by_real_pid(event->sigev_notify_thread_id)) ||
+ 		 rtn->tgid != current->tgid ||
+ 		 (event->sigev_notify & ~SIGEV_THREAD_ID) != SIGEV_SIGNAL))
+ 		return NULL;
+Index: linux-2.6.20/kernel/printk.c
+===================================================================
+--- linux-2.6.20.orig/kernel/printk.c
++++ linux-2.6.20/kernel/printk.c
+@@ -32,6 +32,7 @@
+ #include <linux/bootmem.h>
+ #include <linux/syscalls.h>
+ #include <linux/jiffies.h>
++#include <linux/vs_cvirt.h>
+ 
+ #include <asm/uaccess.h>
+ 
+@@ -183,18 +184,13 @@ int do_syslog(int type, char __user *buf
+ 	unsigned long i, j, limit, count;
+ 	int do_clear = 0;
+ 	char c;
+-	int error = 0;
++	int error;
+ 
+ 	error = security_syslog(type);
+ 	if (error)
+ 		return error;
+ 
+-	switch (type) {
+-	case 0:		/* Close log */
+-		break;
+-	case 1:		/* Open log */
+-		break;
+-	case 2:		/* Read from log */
++	if ((type >= 2) && (type <= 4)) {
+ 		error = -EINVAL;
+ 		if (!buf || len < 0)
+ 			goto out;
+@@ -205,6 +201,16 @@ int do_syslog(int type, char __user *buf
+ 			error = -EFAULT;
+ 			goto out;
+ 		}
++	}
++	if (!vx_check(0, VS_ADMIN|VS_WATCH))
++		return vx_do_syslog(type, buf, len);
++
++	switch (type) {
++	case 0:		/* Close log */
++		break;
++	case 1:		/* Open log */
++		break;
++	case 2:		/* Read from log */
+ 		error = wait_event_interruptible(log_wait,
+ 							(log_start - log_end));
+ 		if (error)
+@@ -229,16 +235,6 @@ int do_syslog(int type, char __user *buf
+ 		do_clear = 1;
+ 		/* FALL THRU */
+ 	case 3:		/* Read last kernel messages */
+-		error = -EINVAL;
+-		if (!buf || len < 0)
+-			goto out;
+-		error = 0;
+-		if (!len)
+-			goto out;
+-		if (!access_ok(VERIFY_WRITE, buf, len)) {
+-			error = -EFAULT;
+-			goto out;
+-		}
+ 		count = len;
+ 		if (count > log_buf_len)
+ 			count = log_buf_len;
+Index: linux-2.6.20/kernel/ptrace.c
+===================================================================
+--- linux-2.6.20.orig/kernel/ptrace.c
++++ linux-2.6.20/kernel/ptrace.c
+@@ -18,6 +18,7 @@
+ #include <linux/ptrace.h>
+ #include <linux/security.h>
+ #include <linux/signal.h>
++#include <linux/vs_context.h>
+ 
+ #include <asm/pgtable.h>
+ #include <asm/uaccess.h>
+@@ -144,6 +145,11 @@ static int may_attach(struct task_struct
+ 		dumpable = task->mm->dumpable;
+ 	if (!dumpable && !capable(CAP_SYS_PTRACE))
+ 		return -EPERM;
++	if (!vx_check(task->xid, VS_ADMIN_P|VS_IDENT))
++		return -EPERM;
++	if (!vx_check(task->xid, VS_IDENT) &&
++		!task_vx_flags(task, VXF_STATE_ADMIN, 0))
++		return -EACCES;
+ 
+ 	return security_ptrace(current, task);
+ }
+@@ -468,6 +474,10 @@ asmlinkage long sys_ptrace(long request,
+ 		goto out;
+ 	}
+ 
++	ret = -EPERM;
++	if (!vx_check(vx_task_xid(child), VS_WATCH_P|VS_IDENT))
++		goto out_put_task_struct;
++
+ 	if (request == PTRACE_ATTACH) {
+ 		ret = ptrace_attach(child);
+ 		goto out_put_task_struct;
+Index: linux-2.6.20/kernel/sched.c
+===================================================================
+--- linux-2.6.20.orig/kernel/sched.c
++++ linux-2.6.20/kernel/sched.c
+@@ -55,6 +55,8 @@
+ #include <asm/tlb.h>
+ 
+ #include <asm/unistd.h>
++#include <linux/vs_sched.h>
++#include <linux/vs_cvirt.h>
+ 
+ /*
+  * Convert user-nice values [ -20 ... 0 ... 19 ]
+@@ -245,6 +247,16 @@ struct rq {
+ 	struct task_struct *migration_thread;
+ 	struct list_head migration_queue;
+ #endif
++	unsigned long norm_time;
++	unsigned long idle_time;
++#ifdef CONFIG_VSERVER_IDLETIME
++	int idle_skip;
++#endif
++#ifdef CONFIG_VSERVER_HARDCPU
++	struct list_head hold_queue;
++	unsigned long nr_onhold;
++	int idle_tokens;
++#endif
+ 
+ #ifdef CONFIG_SCHEDSTATS
+ 	/* latency stats */
+@@ -677,6 +689,7 @@ sched_info_switch(struct task_struct *pr
+  */
+ static void dequeue_task(struct task_struct *p, struct prio_array *array)
+ {
++	BUG_ON(p->state & TASK_ONHOLD);
+ 	array->nr_active--;
+ 	list_del(&p->run_list);
+ 	if (list_empty(array->queue + p->prio))
+@@ -685,6 +698,7 @@ static void dequeue_task(struct task_str
+ 
+ static void enqueue_task(struct task_struct *p, struct prio_array *array)
+ {
++	BUG_ON(p->state & TASK_ONHOLD);
+ 	sched_info_queued(p);
+ 	list_add_tail(&p->run_list, array->queue + p->prio);
+ 	__set_bit(p->prio, array->bitmap);
+@@ -698,12 +712,14 @@ static void enqueue_task(struct task_str
+  */
+ static void requeue_task(struct task_struct *p, struct prio_array *array)
+ {
++	BUG_ON(p->state & TASK_ONHOLD);
+ 	list_move_tail(&p->run_list, array->queue + p->prio);
+ }
+ 
+ static inline void
+ enqueue_task_head(struct task_struct *p, struct prio_array *array)
+ {
++	BUG_ON(p->state & TASK_ONHOLD);
+ 	list_add(&p->run_list, array->queue + p->prio);
+ 	__set_bit(p->prio, array->bitmap);
+ 	array->nr_active++;
+@@ -732,6 +748,10 @@ static inline int __normal_prio(struct t
+ 	bonus = CURRENT_BONUS(p) - MAX_BONUS / 2;
+ 
+ 	prio = p->static_prio - bonus;
++
++	/* adjust effective priority */
++	prio = vx_adjust_prio(p, prio, MAX_USER_PRIO);
++
+ 	if (prio < MAX_RT_PRIO)
+ 		prio = MAX_RT_PRIO;
+ 	if (prio > MAX_PRIO-1)
+@@ -841,6 +861,9 @@ static int effective_prio(struct task_st
+ 	return p->prio;
+ }
+ 
++#include "sched_mon.h"
++
++
+ /*
+  * __activate_task - move a task to the runqueue.
+  */
+@@ -850,6 +873,7 @@ static void __activate_task(struct task_
+ 
+ 	if (batch_task(p))
+ 		target = rq->expired;
++	vxm_activate_task(p, rq);
+ 	enqueue_task(p, target);
+ 	inc_nr_running(p, rq);
+ }
+@@ -859,6 +883,7 @@ static void __activate_task(struct task_
+  */
+ static inline void __activate_idle_task(struct task_struct *p, struct rq *rq)
+ {
++	vxm_activate_idle(p, rq);
+ 	enqueue_task_head(p, rq->active);
+ 	inc_nr_running(p, rq);
+ }
+@@ -993,19 +1018,30 @@ static void activate_task(struct task_st
+ 	}
+ 	p->timestamp = now;
+ out:
++	vx_activate_task(p);
+ 	__activate_task(p, rq);
+ }
+ 
+ /*
+- * deactivate_task - remove a task from the runqueue.
++ * __deactivate_task - remove a task from the runqueue.
+  */
+-static void deactivate_task(struct task_struct *p, struct rq *rq)
++static void __deactivate_task(struct task_struct *p, struct rq *rq)
+ {
+ 	dec_nr_running(p, rq);
+ 	dequeue_task(p, p->array);
++	vxm_deactivate_task(p, rq);
+ 	p->array = NULL;
+ }
+ 
++static inline
++void deactivate_task(struct task_struct *p, struct rq *rq)
++{
++	vx_deactivate_task(p);
++	__deactivate_task(p, rq);
++}
++
++#include "sched_hard.h"
++
+ /*
+  * resched_task - mark a task 'to be rescheduled now'.
+  *
+@@ -1081,6 +1117,7 @@ migrate_task(struct task_struct *p, int 
+ {
+ 	struct rq *rq = task_rq(p);
+ 
++	vxm_migrate_task(p, rq, dest_cpu);
+ 	/*
+ 	 * If the task is not on a runqueue (and not running), then
+ 	 * it is sufficient to simply update the task's cpu field.
+@@ -1409,6 +1446,12 @@ static int try_to_wake_up(struct task_st
+ 
+ 	rq = task_rq_lock(p, &flags);
+ 	old_state = p->state;
++
++	/* we need to unhold suspended tasks */
++	if (old_state & TASK_ONHOLD) {
++		vx_unhold_task(p, rq);
++		old_state = p->state;
++	}
+ 	if (!(old_state & state))
+ 		goto out;
+ 
+@@ -1516,6 +1559,7 @@ out_activate:
+ #endif /* CONFIG_SMP */
+ 	if (old_state == TASK_UNINTERRUPTIBLE) {
+ 		rq->nr_uninterruptible--;
++		vx_uninterruptible_dec(p);
+ 		/*
+ 		 * Tasks on involuntary sleep don't earn
+ 		 * sleep_avg beyond just interactive state.
+@@ -1567,7 +1611,7 @@ int fastcall wake_up_state(struct task_s
+ 	return try_to_wake_up(p, state, 0);
+ }
+ 
+-static void task_running_tick(struct rq *rq, struct task_struct *p);
++static void task_running_tick(struct rq *rq, struct task_struct *p, int cpu);
+ /*
+  * Perform scheduler related setup for a newly forked process p.
+  * p is forked by current.
+@@ -1628,7 +1672,7 @@ void fastcall sched_fork(struct task_str
+ 		 * runqueue lock is not a problem.
+ 		 */
+ 		current->time_slice = 1;
+-		task_running_tick(cpu_rq(cpu), current);
++		task_running_tick(cpu_rq(cpu), current, cpu);
+ 	}
+ 	local_irq_enable();
+ 	put_cpu();
+@@ -1663,6 +1707,7 @@ void fastcall wake_up_new_task(struct ta
+ 
+ 	p->prio = effective_prio(p);
+ 
++	vx_activate_task(p);
+ 	if (likely(cpu == this_cpu)) {
+ 		if (!(clone_flags & CLONE_VM)) {
+ 			/*
+@@ -1674,6 +1719,7 @@ void fastcall wake_up_new_task(struct ta
+ 				__activate_task(p, rq);
+ 			else {
+ 				p->prio = current->prio;
++				BUG_ON(p->state & TASK_ONHOLD);
+ 				p->normal_prio = current->normal_prio;
+ 				list_add_tail(&p->run_list, &current->run_list);
+ 				p->array = current->array;
+@@ -3065,13 +3111,16 @@ static inline int expired_starving(struc
+ void account_user_time(struct task_struct *p, cputime_t cputime)
+ {
+ 	struct cpu_usage_stat *cpustat = &kstat_this_cpu.cpustat;
++	struct vx_info *vxi = p->vx_info;  /* p is _always_ current */
+ 	cputime64_t tmp;
++	int nice = (TASK_NICE(p) > 0);
+ 
+ 	p->utime = cputime_add(p->utime, cputime);
++	vx_account_user(vxi, cputime, nice);
+ 
+ 	/* Add user time to cpustat. */
+ 	tmp = cputime_to_cputime64(cputime);
+-	if (TASK_NICE(p) > 0)
++	if (nice)
+ 		cpustat->nice = cputime64_add(cpustat->nice, tmp);
+ 	else
+ 		cpustat->user = cputime64_add(cpustat->user, tmp);
+@@ -3087,10 +3136,12 @@ void account_system_time(struct task_str
+ 			 cputime_t cputime)
+ {
+ 	struct cpu_usage_stat *cpustat = &kstat_this_cpu.cpustat;
++	struct vx_info *vxi = p->vx_info;  /* p is _always_ current */
+ 	struct rq *rq = this_rq();
+ 	cputime64_t tmp;
+ 
+ 	p->stime = cputime_add(p->stime, cputime);
++	vx_account_system(vxi, cputime, (p == rq->idle));
+ 
+ 	/* Add system time to cpustat. */
+ 	tmp = cputime_to_cputime64(cputime);
+@@ -3129,7 +3180,7 @@ void account_steal_time(struct task_stru
+ 		cpustat->steal = cputime64_add(cpustat->steal, tmp);
+ }
+ 
+-static void task_running_tick(struct rq *rq, struct task_struct *p)
++static void task_running_tick(struct rq *rq, struct task_struct *p, int cpu)
+ {
+ 	if (p->array != rq->active) {
+ 		/* Task has expired but was not scheduled yet */
+@@ -3159,7 +3210,7 @@ static void task_running_tick(struct rq 
+ 		}
+ 		goto out_unlock;
+ 	}
+-	if (!--p->time_slice) {
++	if (vx_need_resched(p, --p->time_slice, cpu)) {
+ 		dequeue_task(p, rq->active);
+ 		set_tsk_need_resched(p);
+ 		p->prio = effective_prio(p);
+@@ -3219,12 +3270,14 @@ void scheduler_tick(void)
+ 	struct rq *rq = cpu_rq(cpu);
+ 
+ 	update_cpu_clock(p, rq, now);
++	vxm_sync(now, cpu);
+ 
+-	if (p == rq->idle)
++	if (p == rq->idle) {
+ 		/* Task on the idle queue */
+ 		wake_priority_sleeper(rq);
+-	else
+-		task_running_tick(rq, p);
++		vx_idle_resched(rq);
++	} else
++		task_running_tick(rq, p, cpu);
+ #ifdef CONFIG_SMP
+ 	update_load(rq);
+ 	if (time_after_eq(jiffies, rq->next_balance))
+@@ -3476,14 +3529,25 @@ need_resched_nonpreemptible:
+ 				unlikely(signal_pending(prev))))
+ 			prev->state = TASK_RUNNING;
+ 		else {
+-			if (prev->state == TASK_UNINTERRUPTIBLE)
++			if (prev->state == TASK_UNINTERRUPTIBLE) {
+ 				rq->nr_uninterruptible++;
++				vx_uninterruptible_inc(prev);
++			}
+ 			deactivate_task(prev, rq);
+ 		}
+ 	}
+ 
+ 	cpu = smp_processor_id();
++	vx_set_rq_time(rq, jiffies);
++try_unhold:
++	vx_try_unhold(rq, cpu);
++pick_next:
++
+ 	if (unlikely(!rq->nr_running)) {
++		/* can we skip idle time? */
++		if (vx_try_skip(rq, cpu))
++			goto try_unhold;
++
+ 		idle_balance(cpu, rq);
+ 		if (!rq->nr_running) {
+ 			next = rq->idle;
+@@ -3510,6 +3574,10 @@ need_resched_nonpreemptible:
+ 	queue = array->queue + idx;
+ 	next = list_entry(queue->next, struct task_struct, run_list);
+ 
++	/* check before we schedule this context */
++	if (!vx_schedule(next, rq, cpu))
++		goto pick_next;
++
+ 	if (!rt_task(next) && interactive_sleep(next->sleep_type)) {
+ 		unsigned long long delta = now - next->timestamp;
+ 		if (unlikely((long long)(now - next->timestamp) < 0))
+@@ -4112,7 +4180,7 @@ asmlinkage long sys_nice(int increment)
+ 		nice = 19;
+ 
+ 	if (increment < 0 && !can_nice(current, nice))
+-		return -EPERM;
++		return vx_flags(VXF_IGNEG_NICE, 0) ? 0 : -EPERM;
+ 
+ 	retval = security_task_setnice(current, nice);
+ 	if (retval)
+@@ -4285,6 +4353,7 @@ recheck:
+ 	oldprio = p->prio;
+ 	__setscheduler(p, policy, param->sched_priority);
+ 	if (array) {
++		vx_activate_task(p);
+ 		__activate_task(p, rq);
+ 		/*
+ 		 * Reschedule if we are currently running on this runqueue and
+@@ -5072,6 +5141,7 @@ static int __migrate_task(struct task_st
+ 		p->timestamp = p->timestamp - rq_src->most_recent_timestamp
+ 				+ rq_dest->most_recent_timestamp;
+ 		deactivate_task(p, rq_src);
++		vx_activate_task(p);
+ 		__activate_task(p, rq_dest);
+ 		if (TASK_PREEMPTS_CURR(p, rq_dest))
+ 			resched_task(rq_dest->curr);
+@@ -6919,7 +6989,10 @@ void __init sched_init(void)
+ 		INIT_LIST_HEAD(&rq->migration_queue);
+ #endif
+ 		atomic_set(&rq->nr_iowait, 0);
+-
++#ifdef CONFIG_VSERVER_HARDCPU
++		INIT_LIST_HEAD(&rq->hold_queue);
++		rq->nr_onhold = 0;
++#endif
+ 		for (j = 0; j < 2; j++) {
+ 			array = rq->arrays + j;
+ 			for (k = 0; k < MAX_PRIO; k++) {
+@@ -7002,6 +7075,7 @@ void normalize_rt_tasks(void)
+ 			deactivate_task(p, task_rq(p));
+ 		__setscheduler(p, SCHED_NORMAL, 0);
+ 		if (array) {
++			vx_activate_task(p);
+ 			__activate_task(p, task_rq(p));
+ 			resched_task(rq->curr);
+ 		}
+Index: linux-2.6.20/kernel/sched_hard.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/kernel/sched_hard.h
+@@ -0,0 +1,324 @@
++
++#ifdef CONFIG_VSERVER_IDLELIMIT
++
++/*
++ * vx_idle_resched - reschedule after maxidle
++ */
++static inline
++void vx_idle_resched(struct rq *rq)
++{
++	/* maybe have a better criterion for paused */
++	if (!--rq->idle_tokens && !list_empty(&rq->hold_queue))
++		set_need_resched();
++}
++
++#else /* !CONFIG_VSERVER_IDLELIMIT */
++
++#define vx_idle_resched(rq)
++
++#endif /* CONFIG_VSERVER_IDLELIMIT */
++
++
++
++#ifdef CONFIG_VSERVER_IDLETIME
++
++#define vx_set_rq_min_skip(rq, min)		\
++	(rq)->idle_skip = (min)
++
++#define vx_save_min_skip(ret, min, val)		\
++	__vx_save_min_skip(ret, min, val)
++
++static inline
++void __vx_save_min_skip(int ret, int *min, int val)
++{
++	if (ret > -2)
++		return;
++	if ((*min > val) || !*min)
++		*min = val;
++}
++
++static inline
++int vx_try_skip(struct rq *rq, int cpu)
++{
++	/* artificially advance time */
++	if (rq->idle_skip > 0) {
++		vxdprintk(list_empty(&rq->hold_queue),
++			"hold queue empty on cpu %d", cpu);
++		rq->idle_time += rq->idle_skip;
++		vxm_idle_skip(rq, cpu);
++		return 1;
++	}
++	return 0;
++}
++
++#else /* !CONFIG_VSERVER_IDLETIME */
++
++#define vx_set_rq_min_skip(rq, min)		\
++	({ int dummy = (min); dummy; })
++
++#define vx_save_min_skip(ret, min, val)
++
++static inline
++int vx_try_skip(struct rq *rq, int cpu)
++{
++	return 0;
++}
++
++#endif /* CONFIG_VSERVER_IDLETIME */
++
++
++
++#ifdef CONFIG_VSERVER_HARDCPU
++
++#define vx_set_rq_max_idle(rq, max)		\
++	(rq)->idle_tokens = (max)
++
++#define vx_save_max_idle(ret, min, val)		\
++	__vx_save_max_idle(ret, min, val)
++
++static inline
++void __vx_save_max_idle(int ret, int *min, int val)
++{
++	if (*min > val)
++		*min = val;
++}
++
++
++/*
++ * vx_hold_task - put a task on the hold queue
++ */
++static inline
++void vx_hold_task(struct task_struct *p, struct rq *rq)
++{
++	__deactivate_task(p, rq);
++	p->state |= TASK_ONHOLD;
++	/* a new one on hold */
++	rq->nr_onhold++;
++	vxm_hold_task(p, rq);
++	list_add_tail(&p->run_list, &rq->hold_queue);
++}
++
++/*
++ * vx_unhold_task - put a task back to the runqueue
++ */
++static inline
++void vx_unhold_task(struct task_struct *p, struct rq *rq)
++{
++	list_del(&p->run_list);
++	/* one less waiting */
++	rq->nr_onhold--;
++	p->state &= ~TASK_ONHOLD;
++	enqueue_task(p, rq->expired);
++	inc_nr_running(p, rq);
++	vxm_unhold_task(p, rq);
++
++	if (p->static_prio < rq->best_expired_prio)
++		rq->best_expired_prio = p->static_prio;
++}
++
++unsigned long nr_onhold(void)
++{
++	unsigned long i, sum = 0;
++
++	for_each_online_cpu(i)
++		sum += cpu_rq(i)->nr_onhold;
++
++	return sum;
++}
++
++
++
++static inline
++int __vx_tokens_avail(struct _vx_sched_pc *sched_pc)
++{
++	return sched_pc->tokens;
++}
++
++static inline
++void __vx_consume_token(struct _vx_sched_pc *sched_pc)
++{
++	sched_pc->tokens--;
++}
++
++static inline
++int vx_need_resched(struct task_struct *p, int slice, int cpu)
++{
++	struct vx_info *vxi = p->vx_info;
++
++	if (vx_info_flags(vxi, VXF_SCHED_HARD|VXF_SCHED_PRIO, 0)) {
++		struct _vx_sched_pc *sched_pc =
++			&vx_per_cpu(vxi, sched_pc, cpu);
++		int tokens;
++
++		/* maybe we can simplify that to decrement
++		   the token counter unconditional? */
++
++		if ((tokens = __vx_tokens_avail(sched_pc)) > 0)
++			__vx_consume_token(sched_pc);
++
++		/* for tokens > 0, one token was consumed */
++		if (tokens < 2)
++			slice = 0;
++	}
++	vxm_need_resched(p, slice, cpu);
++	return (slice == 0);
++}
++
++
++#define vx_set_rq_time(rq, time) do {	\
++	rq->norm_time = time;		\
++} while (0)
++
++
++static inline
++void vx_try_unhold(struct rq *rq, int cpu)
++{
++	struct vx_info *vxi = NULL;
++	struct list_head *l, *n;
++	int maxidle = HZ;
++	int minskip = 0;
++
++	/* nothing to do? what about pause? */
++	if (list_empty(&rq->hold_queue))
++		return;
++
++	list_for_each_safe(l, n, &rq->hold_queue) {
++		int ret, delta_min[2];
++		struct _vx_sched_pc *sched_pc;
++		struct task_struct *p;
++
++		p = list_entry(l, struct task_struct, run_list);
++		/* don't bother with same context */
++		if (vxi == p->vx_info)
++			continue;
++
++		vxi = p->vx_info;
++		/* ignore paused contexts */
++		if (vx_info_flags(vxi, VXF_SCHED_PAUSE, 0))
++			continue;
++
++		sched_pc = &vx_per_cpu(vxi, sched_pc, cpu);
++
++		/* recalc tokens */
++		vxm_sched_info(sched_pc, vxi, cpu);
++		ret = vx_tokens_recalc(sched_pc,
++			&rq->norm_time, &rq->idle_time, delta_min);
++		vxm_tokens_recalc(sched_pc, rq, vxi, cpu);
++
++		if (ret > 0) {
++			/* we found a runable context */
++			vx_unhold_task(p, rq);
++			break;
++		}
++		vx_save_max_idle(ret, &maxidle, delta_min[0]);
++		vx_save_min_skip(ret, &minskip, delta_min[1]);
++	}
++	vx_set_rq_max_idle(rq, maxidle);
++	vx_set_rq_min_skip(rq, minskip);
++	vxm_rq_max_min(rq, cpu);
++}
++
++
++static inline
++int vx_schedule(struct task_struct *next, struct rq *rq, int cpu)
++{
++	struct vx_info *vxi = next->vx_info;
++	struct _vx_sched_pc *sched_pc;
++	int delta_min[2];
++	int flags, ret;
++
++	if (!vxi)
++		return 1;
++
++	flags = vxi->vx_flags;
++
++	if (unlikely(vs_check_flags(flags , VXF_SCHED_PAUSE, 0)))
++		goto put_on_hold;
++	if (!vs_check_flags(flags , VXF_SCHED_HARD|VXF_SCHED_PRIO, 0))
++		return 1;
++
++	sched_pc = &vx_per_cpu(vxi, sched_pc, cpu);
++#ifdef CONFIG_SMP
++	/* update scheduler params */
++	if (cpu_isset(cpu, vxi->sched.update)) {
++		vx_update_sched_param(&vxi->sched, sched_pc);
++		vxm_update_sched(sched_pc, vxi, cpu);
++		cpu_clear(cpu, vxi->sched.update);
++	}
++#endif
++	vxm_sched_info(sched_pc, vxi, cpu);
++	ret  = vx_tokens_recalc(sched_pc,
++		&rq->norm_time, &rq->idle_time, delta_min);
++	vxm_tokens_recalc(sched_pc, rq, vxi, cpu);
++
++	if (!vs_check_flags(flags , VXF_SCHED_HARD, 0))
++		return 1;
++
++	if (unlikely(ret < 0)) {
++		vx_save_max_idle(ret, &rq->idle_tokens, delta_min[0]);
++		vx_save_min_skip(ret, &rq->idle_skip, delta_min[1]);
++		vxm_rq_max_min(rq, cpu);
++	put_on_hold:
++		vx_hold_task(next, rq);
++		return 0;
++	}
++	return 1;
++}
++
++
++#else /* CONFIG_VSERVER_HARDCPU */
++
++static inline
++void vx_hold_task(struct task_struct *p, struct rq *rq)
++{
++	return;
++}
++
++static inline
++void vx_unhold_task(struct task_struct *p, struct rq *rq)
++{
++	return;
++}
++
++unsigned long nr_onhold(void)
++{
++	return 0;
++}
++
++
++static inline
++int vx_need_resched(struct task_struct *p, int slice, int cpu)
++{
++	return (slice == 0);
++}
++
++
++#define vx_set_rq_time(rq, time)
++
++static inline
++void vx_try_unhold(struct rq *rq, int cpu)
++{
++	return;
++}
++
++static inline
++int vx_schedule(struct task_struct *next, struct rq *rq, int cpu)
++{
++	struct vx_info *vxi = next->vx_info;
++	struct _vx_sched_pc *sched_pc;
++	int delta_min[2];
++	int ret;
++
++	if (!vx_info_flags(vxi, VXF_SCHED_PRIO, 0))
++		return 1;
++
++	sched_pc = &vx_per_cpu(vxi, sched_pc, cpu);
++	vxm_sched_info(sched_pc, vxi, cpu);
++	ret  = vx_tokens_recalc(sched_pc,
++		&rq->norm_time, &rq->idle_time, delta_min);
++	vxm_tokens_recalc(sched_pc, rq, vxi, cpu);
++	return 1;
++}
++
++#endif /* CONFIG_VSERVER_HARDCPU */
++
+Index: linux-2.6.20/kernel/sched_mon.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/kernel/sched_mon.h
+@@ -0,0 +1,200 @@
++
++#include <linux/vserver/monitor.h>
++
++#ifdef  CONFIG_VSERVER_MONITOR
++
++#ifdef	CONFIG_VSERVER_HARDCPU
++#define HARDCPU(x) (x)
++#else
++#define HARDCPU(x) (0)
++#endif
++
++#ifdef	CONFIG_VSERVER_IDLETIME
++#define IDLETIME(x) (x)
++#else
++#define IDLETIME(x) (0)
++#endif
++
++struct _vx_mon_entry *vxm_advance(int cpu);
++
++
++static inline
++void	__vxm_basic(struct _vx_mon_entry *entry, xid_t xid, int type)
++{
++	entry->type = type;
++	entry->xid = xid;
++}
++
++static inline
++void	__vxm_sync(int cpu)
++{
++	struct _vx_mon_entry *entry = vxm_advance(cpu);
++
++	__vxm_basic(entry, 0, VXM_SYNC);
++	entry->ev.sec = xtime.tv_sec;
++	entry->ev.nsec = xtime.tv_nsec;
++}
++
++static inline
++void	__vxm_task(struct task_struct *p, int type)
++{
++	struct _vx_mon_entry *entry = vxm_advance(task_cpu(p));
++
++	__vxm_basic(entry, p->xid, type);
++	entry->ev.tsk.pid = p->pid;
++	entry->ev.tsk.state = p->state;
++}
++
++static inline
++void	__vxm_sched(struct _vx_sched_pc *s, struct vx_info *vxi, int cpu)
++{
++	struct _vx_mon_entry *entry = vxm_advance(cpu);
++
++	__vxm_basic(entry, vxi->vx_id, (VXM_SCHED | s->flags));
++	entry->sd.tokens = s->tokens;
++	entry->sd.norm_time = s->norm_time;
++	entry->sd.idle_time = s->idle_time;
++}
++
++static inline
++void	__vxm_rqinfo1(struct rq *q, int cpu)
++{
++	struct _vx_mon_entry *entry = vxm_advance(cpu);
++
++	entry->type = VXM_RQINFO_1;
++	entry->xid = ((unsigned long)q >> 16) & 0xffff;
++	entry->q1.running = q->nr_running;
++	entry->q1.onhold = HARDCPU(q->nr_onhold);
++	entry->q1.iowait = atomic_read(&q->nr_iowait);
++	entry->q1.uintr = q->nr_uninterruptible;
++	entry->q1.idle_tokens = IDLETIME(q->idle_tokens);
++}
++
++static inline
++void	__vxm_rqinfo2(struct rq *q, int cpu)
++{
++	struct _vx_mon_entry *entry = vxm_advance(cpu);
++
++	entry->type = VXM_RQINFO_2;
++	entry->xid = (unsigned long)q & 0xffff;
++	entry->q2.norm_time = q->norm_time;
++	entry->q2.idle_time = q->idle_time;
++	entry->q2.idle_skip = IDLETIME(q->idle_skip);
++}
++
++static inline
++void	__vxm_update(struct _vx_sched_pc *s, struct vx_info *vxi, int cpu)
++{
++	struct _vx_mon_entry *entry = vxm_advance(cpu);
++
++	__vxm_basic(entry, vxi->vx_id, VXM_UPDATE);
++	entry->ev.tokens = s->tokens;
++}
++
++static inline
++void	__vxm_update1(struct _vx_sched_pc *s, struct vx_info *vxi, int cpu)
++{
++	struct _vx_mon_entry *entry = vxm_advance(cpu);
++
++	__vxm_basic(entry, vxi->vx_id, VXM_UPDATE_1);
++	entry->u1.tokens_max = s->tokens_max;
++	entry->u1.fill_rate = s->fill_rate[0];
++	entry->u1.interval = s->interval[0];
++}
++
++static inline
++void	__vxm_update2(struct _vx_sched_pc *s, struct vx_info *vxi, int cpu)
++{
++	struct _vx_mon_entry *entry = vxm_advance(cpu);
++
++	__vxm_basic(entry, vxi->vx_id, VXM_UPDATE_2);
++	entry->u2.tokens_min = s->tokens_min;
++	entry->u2.fill_rate = s->fill_rate[1];
++	entry->u2.interval = s->interval[1];
++}
++
++
++#define	vxm_activate_task(p,q)		__vxm_task(p, VXM_ACTIVATE)
++#define	vxm_activate_idle(p,q)		__vxm_task(p, VXM_IDLE)
++#define	vxm_deactivate_task(p,q)	__vxm_task(p, VXM_DEACTIVATE)
++#define	vxm_hold_task(p,q)		__vxm_task(p, VXM_HOLD)
++#define	vxm_unhold_task(p,q)		__vxm_task(p, VXM_UNHOLD)
++
++static inline
++void	vxm_migrate_task(struct task_struct *p, struct rq *rq, int dest)
++{
++	__vxm_task(p, VXM_MIGRATE);
++	__vxm_rqinfo1(rq, task_cpu(p));
++	__vxm_rqinfo2(rq, task_cpu(p));
++}
++
++static inline
++void	vxm_idle_skip(struct rq *rq, int cpu)
++{
++	__vxm_rqinfo1(rq, cpu);
++	__vxm_rqinfo2(rq, cpu);
++}
++
++static inline
++void	vxm_need_resched(struct task_struct *p, int slice, int cpu)
++{
++	if (slice)
++		return;
++
++	__vxm_task(p, VXM_RESCHED);
++}
++
++static inline
++void	vxm_sync(unsigned long now, int cpu)
++{
++	if (!CONFIG_VSERVER_MONITOR_SYNC ||
++		(now % CONFIG_VSERVER_MONITOR_SYNC))
++		return;
++
++	__vxm_sync(cpu);
++}
++
++#define	vxm_sched_info(s,v,c)		__vxm_sched(s,v,c)
++
++static inline
++void	vxm_tokens_recalc(struct _vx_sched_pc *s, struct rq *rq,
++	struct vx_info *vxi, int cpu)
++{
++	__vxm_sched(s, vxi, cpu);
++	__vxm_rqinfo2(rq, cpu);
++}
++
++static inline
++void	vxm_update_sched(struct _vx_sched_pc *s, struct vx_info *vxi, int cpu)
++{
++	__vxm_sched(s, vxi, cpu);
++	__vxm_update(s, vxi, cpu);
++	__vxm_update1(s, vxi, cpu);
++	__vxm_update2(s, vxi, cpu);
++}
++
++static inline
++void	vxm_rq_max_min(struct rq *rq, int cpu)
++{
++	__vxm_rqinfo1(rq, cpu);
++	__vxm_rqinfo2(rq, cpu);
++}
++
++#else  /* CONFIG_VSERVER_MONITOR */
++
++#define	vxm_activate_task(t,q)		do { } while (0)
++#define	vxm_activate_idle(t,q)		do { } while (0)
++#define	vxm_deactivate_task(t,q)	do { } while (0)
++#define	vxm_hold_task(t,q)		do { } while (0)
++#define	vxm_unhold_task(t,q)		do { } while (0)
++#define	vxm_migrate_task(t,q,d)		do { } while (0)
++#define	vxm_idle_skip(q,c)		do { } while (0)
++#define	vxm_need_resched(t,s,c)		do { } while (0)
++#define	vxm_sync(s,c)			do { } while (0)
++#define	vxm_sched_info(s,v,c)		do { } while (0)
++#define	vxm_tokens_recalc(s,q,v,c)	do { } while (0)
++#define	vxm_update_sched(s,v,c)		do { } while (0)
++#define	vxm_rq_max_min(q,c)		do { } while (0)
++
++#endif /* CONFIG_VSERVER_MONITOR */
++
+Index: linux-2.6.20/kernel/signal.c
+===================================================================
+--- linux-2.6.20.orig/kernel/signal.c
++++ linux-2.6.20/kernel/signal.c
+@@ -26,6 +26,7 @@
+ #include <linux/freezer.h>
+ #include <linux/pid_namespace.h>
+ #include <linux/nsproxy.h>
++#include <linux/vs_context.h>
+ 
+ #include <asm/param.h>
+ #include <asm/uaccess.h>
+@@ -581,17 +582,34 @@ static int check_kill_permission(int sig
+ 				 struct task_struct *t)
+ {
+ 	int error = -EINVAL;
++
+ 	if (!valid_signal(sig))
+ 		return error;
++
++	if ((info != SEND_SIG_NOINFO) &&
++		(is_si_special(info) || !SI_FROMUSER(info)))
++		goto skip;
++
++	vxdprintk(VXD_CBIT(misc, 7),
++		"check_kill_permission(%d,%p,%p[#%u,%u])",
++		sig, info, t, vx_task_xid(t), t->pid);
++
+ 	error = -EPERM;
+-	if ((info == SEND_SIG_NOINFO || (!is_si_special(info) && SI_FROMUSER(info)))
+-	    && ((sig != SIGCONT) ||
++	if (((sig != SIGCONT) ||
+ 		(process_session(current) != process_session(t)))
+ 	    && (current->euid ^ t->suid) && (current->euid ^ t->uid)
+ 	    && (current->uid ^ t->suid) && (current->uid ^ t->uid)
+ 	    && !capable(CAP_KILL))
+ 		return error;
+ 
++	error = -ESRCH;
++	if (!vx_check(vx_task_xid(t), VS_WATCH_P|VS_IDENT)) {
++		vxwprintk(current->xid || VXD_CBIT(misc, 7),
++			"signal %d[%p] xid mismatch %p[#%u,%u] xid=#%u",
++			sig, info, t, vx_task_xid(t), t->pid, current->xid);
++		return error;
++	}
++skip:
+ 	error = security_task_kill(t, info, sig, 0);
+ 	if (!error)
+ 		audit_signal_info(sig, t); /* Let audit system see the signal */
+@@ -1129,7 +1147,7 @@ int kill_pid_info(int sig, struct siginf
+ 	}
+ 	p = pid_task(pid, PIDTYPE_PID);
+ 	error = -ESRCH;
+-	if (p)
++	if (p && vx_check(vx_task_xid(p), VS_IDENT))
+ 		error = group_send_sig_info(sig, info, p);
+ 	if (unlikely(acquired_tasklist_lock))
+ 		read_unlock(&tasklist_lock);
+@@ -1200,7 +1218,8 @@ static int kill_something_info(int sig, 
+ 
+ 		read_lock(&tasklist_lock);
+ 		for_each_process(p) {
+-			if (p->pid > 1 && p->tgid != current->tgid) {
++			if (vx_check(vx_task_xid(p), VS_ADMIN_P|VS_IDENT) &&
++				p->pid > 1 && p->tgid != current->tgid) {
+ 				int err = group_send_sig_info(sig, info, p);
+ 				++count;
+ 				if (err != -EPERM)
+@@ -1890,6 +1909,11 @@ relock:
+ 		if (current == child_reaper(current))
+ 			continue;
+ 
++		/* virtual init is protected against user signals */
++		if ((info->si_code == SI_USER) &&
++			vx_current_initpid(current->pid))
++			continue;
++
+ 		if (sig_kernel_stop(signr)) {
+ 			/*
+ 			 * The default action is to stop all threads in
+Index: linux-2.6.20/kernel/softirq.c
+===================================================================
+--- linux-2.6.20.orig/kernel/softirq.c
++++ linux-2.6.20/kernel/softirq.c
+@@ -17,6 +17,7 @@
+ #include <linux/kthread.h>
+ #include <linux/rcupdate.h>
+ #include <linux/smp.h>
++#include <linux/vs_context.h>
+ 
+ #include <asm/irq.h>
+ /*
+Index: linux-2.6.20/kernel/sys.c
+===================================================================
+--- linux-2.6.20.orig/kernel/sys.c
++++ linux-2.6.20/kernel/sys.c
+@@ -10,6 +10,7 @@
+ #include <linux/mman.h>
+ #include <linux/smp_lock.h>
+ #include <linux/notifier.h>
++#include <linux/kmod.h>
+ #include <linux/reboot.h>
+ #include <linux/prctl.h>
+ #include <linux/highuid.h>
+@@ -33,6 +34,7 @@
+ #include <linux/compat.h>
+ #include <linux/syscalls.h>
+ #include <linux/kprobes.h>
++#include <linux/vs_pid.h>
+ 
+ #include <asm/uaccess.h>
+ #include <asm/io.h>
+@@ -576,7 +578,10 @@ static int set_one_prio(struct task_stru
+ 		goto out;
+ 	}
+ 	if (niceval < task_nice(p) && !can_nice(p, niceval)) {
+-		error = -EACCES;
++		if (vx_flags(VXF_IGNEG_NICE, 0))
++			error = 0;
++		else
++			error = -EACCES;
+ 		goto out;
+ 	}
+ 	no_nice = security_task_setnice(p, niceval);
+@@ -628,7 +633,8 @@ asmlinkage long sys_setpriority(int whic
+ 			if (!who)
+ 				who = current->uid;
+ 			else
+-				if ((who != current->uid) && !(user = find_user(who)))
++				if ((who != current->uid) &&
++					!(user = find_user(vx_current_xid(), who)))
+ 					goto out_unlock;	/* No processes for this user */
+ 
+ 			do_each_thread(g, p)
+@@ -686,7 +692,8 @@ asmlinkage long sys_getpriority(int whic
+ 			if (!who)
+ 				who = current->uid;
+ 			else
+-				if ((who != current->uid) && !(user = find_user(who)))
++				if ((who != current->uid) &&
++					!(user = find_user(vx_current_xid(), who)))
+ 					goto out_unlock;	/* No processes for this user */
+ 
+ 			do_each_thread(g, p)
+@@ -799,6 +806,9 @@ void kernel_power_off(void)
+ 	machine_power_off();
+ }
+ EXPORT_SYMBOL_GPL(kernel_power_off);
++
++long vs_reboot(unsigned int, void __user *);
++
+ /*
+  * Reboot system call: for obvious reasons only root may call it,
+  * and even root needs to set up some magic numbers in the registers
+@@ -829,6 +839,9 @@ asmlinkage long sys_reboot(int magic1, i
+ 	if ((cmd == LINUX_REBOOT_CMD_POWER_OFF) && !pm_power_off)
+ 		cmd = LINUX_REBOOT_CMD_HALT;
+ 
++	if (!vx_check(0, VS_ADMIN|VS_WATCH))
++		return vs_reboot(cmd, arg);
++
+ 	lock_kernel();
+ 	switch (cmd) {
+ 	case LINUX_REBOOT_CMD_RESTART:
+@@ -1008,7 +1021,7 @@ static int set_user(uid_t new_ruid, int 
+ {
+ 	struct user_struct *new_user;
+ 
+-	new_user = alloc_uid(new_ruid);
++	new_user = alloc_uid(vx_current_xid(), new_ruid);
+ 	if (!new_user)
+ 		return -EAGAIN;
+ 
+@@ -1363,15 +1376,18 @@ asmlinkage long sys_setpgid(pid_t pid, p
+ {
+ 	struct task_struct *p;
+ 	struct task_struct *group_leader = current->group_leader;
++	pid_t rpgid;
+ 	int err = -EINVAL;
+ 
+ 	if (!pid)
+-		pid = group_leader->pid;
++		pid = vx_map_pid(group_leader->pid);
+ 	if (!pgid)
+ 		pgid = pid;
+ 	if (pgid < 0)
+ 		return -EINVAL;
+ 
++	rpgid = vx_rmap_pid(pgid);
++
+ 	/* From this point forward we keep holding onto the tasklist lock
+ 	 * so that our parent does not change from under us. -DaveM
+ 	 */
+@@ -1405,20 +1421,20 @@ asmlinkage long sys_setpgid(pid_t pid, p
+ 
+ 	if (pgid != pid) {
+ 		struct task_struct *g =
+-			find_task_by_pid_type(PIDTYPE_PGID, pgid);
++			find_task_by_pid_type(PIDTYPE_PGID, rpgid);
+ 
+ 		if (!g || process_session(g) != process_session(group_leader))
+ 			goto out;
+ 	}
+ 
+-	err = security_task_setpgid(p, pgid);
++	err = security_task_setpgid(p, rpgid);
+ 	if (err)
+ 		goto out;
+ 
+-	if (process_group(p) != pgid) {
++	if (process_group(p) != rpgid) {
+ 		detach_pid(p, PIDTYPE_PGID);
+-		p->signal->pgrp = pgid;
+-		attach_pid(p, PIDTYPE_PGID, pgid);
++		p->signal->pgrp = rpgid;
++		attach_pid(p, PIDTYPE_PGID, rpgid);
+ 	}
+ 
+ 	err = 0;
+@@ -1431,7 +1447,7 @@ out:
+ asmlinkage long sys_getpgid(pid_t pid)
+ {
+ 	if (!pid)
+-		return process_group(current);
++		return vx_rmap_pid(process_group(current));
+ 	else {
+ 		int retval;
+ 		struct task_struct *p;
+@@ -1443,7 +1459,7 @@ asmlinkage long sys_getpgid(pid_t pid)
+ 		if (p) {
+ 			retval = security_task_getpgid(p);
+ 			if (!retval)
+-				retval = process_group(p);
++				retval = vx_rmap_pid(process_group(p));
+ 		}
+ 		read_unlock(&tasklist_lock);
+ 		return retval;
+@@ -1795,7 +1811,7 @@ asmlinkage long sys_sethostname(char __u
+ 	int errno;
+ 	char tmp[__NEW_UTS_LEN];
+ 
+-	if (!capable(CAP_SYS_ADMIN))
++	if (!vx_capable(CAP_SYS_ADMIN, VXC_SET_UTSNAME))
+ 		return -EPERM;
+ 	if (len < 0 || len > __NEW_UTS_LEN)
+ 		return -EINVAL;
+@@ -1840,7 +1856,7 @@ asmlinkage long sys_setdomainname(char _
+ 	int errno;
+ 	char tmp[__NEW_UTS_LEN];
+ 
+-	if (!capable(CAP_SYS_ADMIN))
++	if (!vx_capable(CAP_SYS_ADMIN, VXC_SET_UTSNAME))
+ 		return -EPERM;
+ 	if (len < 0 || len > __NEW_UTS_LEN)
+ 		return -EINVAL;
+@@ -1907,7 +1923,7 @@ asmlinkage long sys_setrlimit(unsigned i
+ 		return -EINVAL;
+ 	old_rlim = current->signal->rlim + resource;
+ 	if ((new_rlim.rlim_max > old_rlim->rlim_max) &&
+-	    !capable(CAP_SYS_RESOURCE))
++	    !vx_capable(CAP_SYS_RESOURCE, VXC_SET_RLIMIT))
+ 		return -EPERM;
+ 	if (resource == RLIMIT_NOFILE && new_rlim.rlim_max > NR_OPEN)
+ 		return -EPERM;
+Index: linux-2.6.20/kernel/sysctl.c
+===================================================================
+--- linux-2.6.20.orig/kernel/sysctl.c
++++ linux-2.6.20/kernel/sysctl.c
+@@ -90,6 +90,7 @@ extern char modprobe_path[];
+ #ifdef CONFIG_FB_SPLASH
+ extern char fbsplash_path[];
+ #endif
++extern char vshelper_path[];
+ #ifdef CONFIG_CHR_DEV_SG
+ extern int sg_big_buff;
+ #endif
+@@ -477,6 +478,15 @@ static ctl_table kern_table[] = {
+ 		.strategy	= &sysctl_string,
+ 	},
+ #endif
++	{
++		.ctl_name	= KERN_VSHELPER,
++		.procname	= "vshelper",
++		.data		= &vshelper_path,
++		.maxlen		= 256,
++		.mode		= 0644,
++		.proc_handler	= &proc_dostring,
++		.strategy	= &sysctl_string,
++	},
+ #ifdef CONFIG_CHR_DEV_SG
+ 	{
+ 		.ctl_name	= KERN_SG_BIG_BUFF,
+Index: linux-2.6.20/kernel/time.c
+===================================================================
+--- linux-2.6.20.orig/kernel/time.c
++++ linux-2.6.20/kernel/time.c
+@@ -61,7 +61,7 @@ asmlinkage long sys_time(time_t __user *
+ 	time_t i;
+ 	struct timeval tv;
+ 
+-	do_gettimeofday(&tv);
++	vx_gettimeofday(&tv);
+ 	i = tv.tv_sec;
+ 
+ 	if (tloc) {
+@@ -92,7 +92,7 @@ asmlinkage long sys_stime(time_t __user 
+ 	if (err)
+ 		return err;
+ 
+-	do_settimeofday(&tv);
++	vx_settimeofday(&tv);
+ 	return 0;
+ }
+ 
+@@ -102,7 +102,7 @@ asmlinkage long sys_gettimeofday(struct 
+ {
+ 	if (likely(tv != NULL)) {
+ 		struct timeval ktv;
+-		do_gettimeofday(&ktv);
++		vx_gettimeofday(&ktv);
+ 		if (copy_to_user(tv, &ktv, sizeof(ktv)))
+ 			return -EFAULT;
+ 	}
+@@ -176,7 +176,7 @@ int do_sys_settimeofday(struct timespec 
+ 		/* SMP safe, again the code in arch/foo/time.c should
+ 		 * globally block out interrupts when it runs.
+ 		 */
+-		return do_settimeofday(tv);
++		return vx_settimeofday(tv);
+ 	}
+ 	return 0;
+ }
+@@ -359,7 +359,7 @@ void getnstimeofday(struct timespec *tv)
+ {
+ 	struct timeval x;
+ 
+-	do_gettimeofday(&x);
++	vx_gettimeofday(&x);
+ 	tv->tv_sec = x.tv_sec;
+ 	tv->tv_nsec = x.tv_usec * NSEC_PER_USEC;
+ }
+Index: linux-2.6.20/kernel/timer.c
+===================================================================
+--- linux-2.6.20.orig/kernel/timer.c
++++ linux-2.6.20/kernel/timer.c
+@@ -34,6 +34,10 @@
+ #include <linux/cpu.h>
+ #include <linux/syscalls.h>
+ #include <linux/delay.h>
++#include <linux/vs_base.h>
++#include <linux/vs_cvirt.h>
++#include <linux/vs_pid.h>
++#include <linux/vserver/sched.h>
+ 
+ #include <asm/uaccess.h>
+ #include <asm/unistd.h>
+@@ -1224,12 +1228,6 @@ asmlinkage unsigned long sys_alarm(unsig
+ 
+ #endif
+ 
+-#ifndef __alpha__
+-
+-/*
+- * The Alpha uses getxpid, getxuid, and getxgid instead.  Maybe this
+- * should be moved into arch/i386 instead?
+- */
+ 
+ /**
+  * sys_getpid - return the thread group id of the current process
+@@ -1242,7 +1240,7 @@ asmlinkage unsigned long sys_alarm(unsig
+  */
+ asmlinkage long sys_getpid(void)
+ {
+-	return current->tgid;
++	return vx_map_tgid(current->tgid);
+ }
+ 
+ /*
+@@ -1258,10 +1256,23 @@ asmlinkage long sys_getppid(void)
+ 	rcu_read_lock();
+ 	pid = rcu_dereference(current->real_parent)->tgid;
+ 	rcu_read_unlock();
++	return vx_map_pid(pid);
++}
++
++#ifdef __alpha__
+ 
+-	return pid;
++/*
++ * The Alpha uses getxpid, getxuid, and getxgid instead.
++ */
++
++asmlinkage long do_getxpid(long *ppid)
++{
++	*ppid = sys_getppid();
++	return sys_getpid();
+ }
+ 
++#else /* _alpha_ */
++
+ asmlinkage long sys_getuid(void)
+ {
+ 	/* Only we change this so SMP safe */
+@@ -1422,6 +1433,8 @@ asmlinkage long sys_sysinfo(struct sysin
+ 			tp.tv_nsec = tp.tv_nsec - NSEC_PER_SEC;
+ 			tp.tv_sec++;
+ 		}
++		if (vx_flags(VXF_VIRT_UPTIME, 0))
++			vx_vsi_uptime(&tp, NULL);
+ 		val.uptime = tp.tv_sec + (tp.tv_nsec ? 1 : 0);
+ 
+ 		val.loads[0] = avenrun[0] << (SI_LOAD_SHIFT - FSHIFT);
+Index: linux-2.6.20/kernel/user.c
+===================================================================
+--- linux-2.6.20.orig/kernel/user.c
++++ linux-2.6.20/kernel/user.c
+@@ -23,8 +23,8 @@
+ #define UIDHASH_BITS (CONFIG_BASE_SMALL ? 3 : 8)
+ #define UIDHASH_SZ		(1 << UIDHASH_BITS)
+ #define UIDHASH_MASK		(UIDHASH_SZ - 1)
+-#define __uidhashfn(uid)	(((uid >> UIDHASH_BITS) + uid) & UIDHASH_MASK)
+-#define uidhashentry(uid)	(uidhash_table + __uidhashfn((uid)))
++#define __uidhashfn(xid,uid)	((((uid) >> UIDHASH_BITS) + ((uid)^(xid))) & UIDHASH_MASK)
++#define uidhashentry(xid,uid)	(uidhash_table + __uidhashfn((xid),(uid)))
+ 
+ static struct kmem_cache *uid_cachep;
+ static struct list_head uidhash_table[UIDHASH_SZ];
+@@ -66,7 +66,7 @@ static inline void uid_hash_remove(struc
+ 	list_del(&up->uidhash_list);
+ }
+ 
+-static inline struct user_struct *uid_hash_find(uid_t uid, struct list_head *hashent)
++static inline struct user_struct *uid_hash_find(xid_t xid, uid_t uid, struct list_head *hashent)
+ {
+ 	struct list_head *up;
+ 
+@@ -75,7 +75,7 @@ static inline struct user_struct *uid_ha
+ 
+ 		user = list_entry(up, struct user_struct, uidhash_list);
+ 
+-		if(user->uid == uid) {
++		if(user->uid == uid && user->xid == xid) {
+ 			atomic_inc(&user->__count);
+ 			return user;
+ 		}
+@@ -90,13 +90,13 @@ static inline struct user_struct *uid_ha
+  *
+  * If the user_struct could not be found, return NULL.
+  */
+-struct user_struct *find_user(uid_t uid)
++struct user_struct *find_user(xid_t xid, uid_t uid)
+ {
+ 	struct user_struct *ret;
+ 	unsigned long flags;
+ 
+ 	spin_lock_irqsave(&uidhash_lock, flags);
+-	ret = uid_hash_find(uid, uidhashentry(uid));
++	ret = uid_hash_find(xid, uid, uidhashentry(xid, uid));
+ 	spin_unlock_irqrestore(&uidhash_lock, flags);
+ 	return ret;
+ }
+@@ -120,13 +120,13 @@ void free_uid(struct user_struct *up)
+ 	}
+ }
+ 
+-struct user_struct * alloc_uid(uid_t uid)
++struct user_struct * alloc_uid(xid_t xid, uid_t uid)
+ {
+-	struct list_head *hashent = uidhashentry(uid);
++	struct list_head *hashent = uidhashentry(xid, uid);
+ 	struct user_struct *up;
+ 
+ 	spin_lock_irq(&uidhash_lock);
+-	up = uid_hash_find(uid, hashent);
++	up = uid_hash_find(xid, uid, hashent);
+ 	spin_unlock_irq(&uidhash_lock);
+ 
+ 	if (!up) {
+@@ -136,6 +136,7 @@ struct user_struct * alloc_uid(uid_t uid
+ 		if (!new)
+ 			return NULL;
+ 		new->uid = uid;
++		new->xid = xid;
+ 		atomic_set(&new->__count, 1);
+ 		atomic_set(&new->processes, 0);
+ 		atomic_set(&new->files, 0);
+@@ -158,7 +159,7 @@ struct user_struct * alloc_uid(uid_t uid
+ 		 * on adding the same user already..
+ 		 */
+ 		spin_lock_irq(&uidhash_lock);
+-		up = uid_hash_find(uid, hashent);
++		up = uid_hash_find(xid, uid, hashent);
+ 		if (up) {
+ 			key_put(new->uid_keyring);
+ 			key_put(new->session_keyring);
+@@ -215,7 +216,7 @@ static int __init uid_cache_init(void)
+ 
+ 	/* Insert the root user immediately (init already runs as root) */
+ 	spin_lock_irq(&uidhash_lock);
+-	uid_hash_insert(&root_user, uidhashentry(0));
++	uid_hash_insert(&root_user, uidhashentry(0,0));
+ 	spin_unlock_irq(&uidhash_lock);
+ 
+ 	return 0;
+Index: linux-2.6.20/kernel/utsname.c
+===================================================================
+--- linux-2.6.20.orig/kernel/utsname.c
++++ linux-2.6.20/kernel/utsname.c
+@@ -13,6 +13,7 @@
+ #include <linux/uts.h>
+ #include <linux/utsname.h>
+ #include <linux/version.h>
++#include <linux/vserver/global.h>
+ 
+ /*
+  * Clone a new ns copying an original utsname, setting refcount to 1
+@@ -27,6 +28,7 @@ static struct uts_namespace *clone_uts_n
+ 	if (ns) {
+ 		memcpy(&ns->name, &old_ns->name, sizeof(ns->name));
+ 		kref_init(&ns->kref);
++		atomic_inc(&vs_global_uts_ns);
+ 	}
+ 	return ns;
+ }
+@@ -91,5 +93,6 @@ void free_uts_ns(struct kref *kref)
+ 	struct uts_namespace *ns;
+ 
+ 	ns = container_of(kref, struct uts_namespace, kref);
++	atomic_dec(&vs_global_uts_ns);
+ 	kfree(ns);
+ }
+Index: linux-2.6.20/kernel/vserver/Kconfig
+===================================================================
+--- /dev/null
++++ linux-2.6.20/kernel/vserver/Kconfig
+@@ -0,0 +1,236 @@
++#
++# Linux VServer configuration
++#
++
++menu "Linux VServer"
++
++config	VSERVER_AUTO_LBACK
++	bool	"Automatically Assign Loopback IP"
++	default y
++	help
++	  Automatically assign a guest specific loopback
++	  IP and add it to the kernel network stack on startup.
++
++config	VSERVER_SINGLE_IP
++	bool	"Single IP Special Casing"
++	depends on EXPERIMENTAL && !VSERVER_AUTO_LBACK
++	default n
++	help
++	  This allows to have network contexts with a single
++	  IP to remap 0.0.0.0 bindings to that IP, avoiding
++	  further network checks and improving performance.
++
++	  (note: such guests do not allow to change the ip
++	   on the fly and do not show loopback addresses)
++
++config	VSERVER_COWBL
++	bool	"Enable COW Immutable Link Breaking"
++	default y
++	help
++	  This enables the COW (Copy-On-Write) link break code.
++	  It allows you to treat unified files like normal files
++	  when writing to them (which will implicitely break the
++	  link and create a copy of the unified file)
++
++config	VSERVER_VTIME
++	bool	"Enable Virtualized Guest Time"
++	depends on EXPERIMENTAL
++	default n
++	help
++	  This enables per guest time offsets to allow for
++	  adjusting the system clock individually per guest.
++	  this adds some overhead to the time functions and
++	  therefore should not be enabled without good reason.
++
++config	VSERVER_PROC_SECURE
++	bool	"Enable Proc Security"
++	depends on PROC_FS
++	default y
++	help
++	  This configures ProcFS security to initially hide
++	  non-process entries for all contexts except the main and
++	  spectator context (i.e. for all guests), which is a secure
++	  default.
++
++	  (note: on 1.2x the entries were visible by default)
++
++config	VSERVER_HARDCPU
++	bool	"Enable Hard CPU Limits"
++	default n
++	help
++	  Activate the Hard CPU Limits
++
++	  This will compile in code that allows the Token Bucket
++	  Scheduler to put processes on hold when a context's
++	  tokens are depleted (provided that its per-context
++	  sched_hard flag is set).
++
++	  Processes belonging to that context will not be able
++	  to consume CPU resources again until a per-context
++	  configured minimum of tokens has been reached.
++
++config	VSERVER_IDLETIME
++	bool	"Avoid idle CPUs by skipping Time"
++	depends on VSERVER_HARDCPU
++	default n
++	help
++	  This option allows the scheduler to artificially
++	  advance time (per cpu) when otherwise the idle
++	  task would be scheduled, thus keeping the cpu
++	  busy and sharing the available resources among
++	  certain contexts.
++
++config	VSERVER_IDLELIMIT
++	bool	"Limit the IDLE task"
++	depends on VSERVER_HARDCPU
++	default n
++	help
++	  Limit the idle slices, so the the next context
++	  will be scheduled as soon as possible.
++
++	  This might improve interactivity and latency, but
++	  will also marginally increase scheduling overhead.
++
++choice
++	prompt	"Persistent Inode Tagging"
++	default	TAGGING_ID24
++	help
++	  This adds persistent context information to filesystems
++	  mounted with the tagxid option. Tagging is a requirement
++	  for per-context disk limits and per-context quota.
++
++
++config	TAGGING_NONE
++	bool	"Disabled"
++	help
++	  do not store per-context information in inodes.
++
++config	TAGGING_UID16
++	bool	"UID16/GID32"
++	help
++	  reduces UID to 16 bit, but leaves GID at 32 bit.
++
++config	TAGGING_GID16
++	bool	"UID32/GID16"
++	help
++	  reduces GID to 16 bit, but leaves UID at 32 bit.
++
++config	TAGGING_ID24
++	bool	"UID24/GID24"
++	help
++	  uses the upper 8bit from UID and GID for XID tagging
++	  which leaves 24bit for UID/GID each, which should be
++	  more than sufficient for normal use.
++
++config	TAGGING_INTERN
++	bool	"UID32/GID32"
++	help
++	  this uses otherwise reserved inode fields in the on
++	  disk representation, which limits the use to a few
++	  filesystems (currently ext2 and ext3)
++
++config	TAGGING_RUNTIME
++	bool	"Runtime"
++	depends on EXPERIMENTAL
++	help
++	  inodes are tagged when first accessed, this doesn't
++	  require any persistant information, but might give
++	  funny results for mixed access.
++
++endchoice
++
++config	TAG_NFSD
++	bool	"Tag NFSD User Auth and Files"
++	default n
++	help
++	  Enable this if you do want the in-kernel NFS
++	  Server to use the tagging specified above.
++	  (will require patched clients too)
++
++config	PROPAGATE
++	bool	"Enable Inode Tag Propagation"
++	default n
++	depends on EXPERIMENTAL
++	help
++	  This allows for the tagid= mount option to specify
++	  a tagid which is to be used for the entire mount
++	  tree.
++
++config	VSERVER_PRIVACY
++	bool	"Honor Privacy Aspects of Guests"
++	default y
++	help
++	  When enabled, most context checks will disallow
++	  access to structures assigned to a specific context,
++	  like ptys or loop devices.
++
++config	VSERVER_DEBUG
++	bool	"VServer Debugging Code"
++	default n
++	help
++	  Set this to yes if you want to be able to activate
++	  debugging output at runtime. It adds a probably small
++	  overhead to all vserver related functions and
++	  increases the kernel size by about 20k.
++
++config	VSERVER_HISTORY
++	bool	"VServer History Tracing"
++	depends on VSERVER_DEBUG
++	default n
++	help
++	  Set this to yes if you want to record the history of
++	  linux-vserver activities, so they can be replayed in
++	  the event of a kernel panic or oops.
++
++config	VSERVER_HISTORY_SIZE
++	int	"Per-CPU History Size (32-65536)"
++	depends on VSERVER_HISTORY
++	range 32 65536
++	default 64
++	help
++	  This allows you to specify the number of entries in
++	  the per-CPU history buffer.
++
++config	VSERVER_MONITOR
++	bool	"VServer Scheduling Monitor"
++	depends on VSERVER_DEBUG
++	default n
++	help
++	  Set this to yes if you want to record the scheduling
++	  decisions, so that they can be relayed to userspace
++	  for detailed analysis.
++
++config	VSERVER_MONITOR_SIZE
++	int	"Per-CPU Monitor Queue Size (32-65536)"
++	depends on VSERVER_MONITOR
++	range 32 65536
++	default 1024
++	help
++	  This allows you to specify the number of entries in
++	  the per-CPU scheduling monitor buffer.
++
++config	VSERVER_MONITOR_SYNC
++	int	"Per-CPU Monitor Sync Interval (0-65536)"
++	depends on VSERVER_MONITOR
++	range 0 65536
++	default 256
++	help
++	  This allows you to specify the interval in ticks
++	  when a time sync entry is inserted.
++
++endmenu
++
++
++config	VSERVER
++	bool
++	default y
++	select UTS_NS
++	select SYSVIPC
++	select IPC_NS
++
++config	VSERVER_SECURITY
++	bool
++	depends on SECURITY
++	default y
++	select SECURITY_CAPABILITIES
++
+Index: linux-2.6.20/kernel/vserver/Makefile
+===================================================================
+--- /dev/null
++++ linux-2.6.20/kernel/vserver/Makefile
+@@ -0,0 +1,16 @@
++#
++# Makefile for the Linux vserver routines.
++#
++
++
++obj-y		+= vserver.o
++
++vserver-y	:= switch.o context.o space.o sched.o network.o inode.o \
++		   limit.o cvirt.o cacct.o signal.o helper.o init.o dlimit.o
++
++vserver-$(CONFIG_INET) += inet.o
++vserver-$(CONFIG_PROC_FS) += proc.o
++vserver-$(CONFIG_VSERVER_DEBUG) += sysctl.o debug.o
++vserver-$(CONFIG_VSERVER_HISTORY) += history.o
++vserver-$(CONFIG_VSERVER_MONITOR) += monitor.o
++
+Index: linux-2.6.20/kernel/vserver/cacct.c
+===================================================================
+--- /dev/null
++++ linux-2.6.20/kernel/vserver/cacct.c
+@@ -0,0 +1,44 @@
++/*
++ *  linux/kernel/vserver/cacct.c
++ *
++ *  Virtual Server: Context Accounting
++ *
++ *  Copyright (C) 2006  Herbert Pötzl
++ *
++ *  V0.01  added accounting stats
++ *
++ */
++
++#include <linux/types.h>
++#include <linux/sched.h>
++#include <linux/vs_context.h>
++#include <linux/vserver/switch.h>
++#include <linux/vserver/cacct_cmd.h>
++#include <linux/vserver/cacct_int.h>
++
++#include <asm/errno.h>
++#include <asm/uaccess.h>
++
++
++int vc_sock_stat(struct vx_info *vxi, void __user *data)
++{
++	struct vcmd_sock_stat_v0 vc_data;
++	int j, field;
++
++	if (copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	field = vc_data.field;
++	if ((field < 0) || (field >= VXA_SOCK_SIZE))
++		return -EINVAL;
++
++	for (j=0; j<3; j++) {
++		vc_data.count[j] = vx_sock_count(&vxi->cacct, field, j);
++		vc_data.total[j] = vx_sock_total(&vxi->cacct, field, j);
++	}
++
++	if (copy_to_user (data, &vc_data, sizeof(vc_data)))
++		return -EFAULT;
++	return 0;
++}
++
+Index: linux-2.6.20/kernel/vserver/cacct_init.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/kernel/vserver/cacct_init.h
+@@ -0,0 +1,25 @@
++
++
++static inline void vx_info_init_cacct(struct _vx_cacct *cacct)
++{
++	int i,j;
++
++
++	for (i=0; i<VXA_SOCK_SIZE; i++) {
++		for (j=0; j<3; j++) {
++			atomic_set(&cacct->sock[i][j].count, 0);
++			atomic_set(&cacct->sock[i][j].total, 0);
++		}
++	}
++	for (i=0; i<8; i++)
++		atomic_set(&cacct->slab[i], 0);
++	for (i=0; i<5; i++)
++		for (j=0; j<4; j++)
++			atomic_set(&cacct->page[i][j], 0);
++}
++
++static inline void vx_info_exit_cacct(struct _vx_cacct *cacct)
++{
++	return;
++}
++
+Index: linux-2.6.20/kernel/vserver/cacct_proc.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/kernel/vserver/cacct_proc.h
+@@ -0,0 +1,58 @@
++#ifndef _VX_CACCT_PROC_H
++#define _VX_CACCT_PROC_H
++
++#include <linux/vserver/cacct_int.h>
++
++
++#define VX_SOCKA_TOP	\
++	"Type\t    recv #/bytes\t\t   send #/bytes\t\t    fail #/bytes\n"
++
++static inline int vx_info_proc_cacct(struct _vx_cacct *cacct, char *buffer)
++{
++	int i,j, length = 0;
++	static char *type[VXA_SOCK_SIZE] = {
++		"UNSPEC", "UNIX", "INET", "INET6", "PACKET", "OTHER" };
++
++	length += sprintf(buffer + length, VX_SOCKA_TOP);
++	for (i=0; i<VXA_SOCK_SIZE; i++) {
++		length += sprintf(buffer + length,
++			"%s:", type[i]);
++		for (j=0; j<3; j++) {
++			length += sprintf(buffer + length,
++				"\t%10lu/%-10lu"
++				,vx_sock_count(cacct, i, j)
++				,vx_sock_total(cacct, i, j)
++				);
++		}
++		buffer[length++] = '\n';
++	}
++
++	length += sprintf(buffer + length, "\n");
++	length += sprintf(buffer + length,
++		"slab:\t %8u %8u %8u %8u\n"
++		,atomic_read(&cacct->slab[1])
++		,atomic_read(&cacct->slab[4])
++		,atomic_read(&cacct->slab[0])
++		,atomic_read(&cacct->slab[2])
++		);
++
++	length += sprintf(buffer + length, "\n");
++	for (i=0; i<5; i++) {
++		length += sprintf(buffer + length,
++			"page[%d]: %8u %8u %8u %8u\t %8u %8u %8u %8u\n"
++			,i
++			,atomic_read(&cacct->page[i][0])
++			,atomic_read(&cacct->page[i][1])
++			,atomic_read(&cacct->page[i][2])
++			,atomic_read(&cacct->page[i][3])
++			,atomic_read(&cacct->page[i][4])
++			,atomic_read(&cacct->page[i][5])
++			,atomic_read(&cacct->page[i][6])
++			,atomic_read(&cacct->page[i][7])
++			);
++	}
++
++	return length;
++}
++
++#endif	/* _VX_CACCT_PROC_H */
+Index: linux-2.6.20/kernel/vserver/context.c
+===================================================================
+--- /dev/null
++++ linux-2.6.20/kernel/vserver/context.c
+@@ -0,0 +1,967 @@
++/*
++ *  linux/kernel/vserver/context.c
++ *
++ *  Virtual Server: Context Support
++ *
++ *  Copyright (C) 2003-2006  Herbert Pötzl
++ *
++ *  V0.01  context helper
++ *  V0.02  vx_ctx_kill syscall command
++ *  V0.03  replaced context_info calls
++ *  V0.04  redesign of struct (de)alloc
++ *  V0.05  rlimit basic implementation
++ *  V0.06  task_xid and info commands
++ *  V0.07  context flags and caps
++ *  V0.08  switch to RCU based hash
++ *  V0.09  revert to non RCU for now
++ *  V0.10  and back to working RCU hash
++ *  V0.11  and back to locking again
++ *  V0.12  referenced context store
++ *  V0.13  separate per cpu data
++ *  V0.14  changed vcmds to vxi arg
++ *  V0.15  added context stat
++ *
++ */
++
++#include <linux/slab.h>
++#include <linux/types.h>
++#include <linux/mnt_namespace.h>
++#include <linux/pid_namespace.h>
++
++#include <linux/sched.h>
++#include <linux/vserver/context.h>
++#include <linux/vserver/network.h>
++#include <linux/vserver/debug.h>
++#include <linux/vserver/limit.h>
++#include <linux/vserver/limit_int.h>
++#include <linux/vserver/space.h>
++
++#include <linux/vs_context.h>
++#include <linux/vs_limit.h>
++#include <linux/vserver/context_cmd.h>
++
++#include <linux/err.h>
++#include <asm/errno.h>
++
++#include "cvirt_init.h"
++#include "cacct_init.h"
++#include "limit_init.h"
++#include "sched_init.h"
++
++
++atomic_t vx_global_ctotal	= ATOMIC_INIT(0);
++atomic_t vx_global_cactive	= ATOMIC_INIT(0);
++
++
++/*	now inactive context structures */
++
++static struct hlist_head vx_info_inactive = HLIST_HEAD_INIT;
++
++static spinlock_t vx_info_inactive_lock = SPIN_LOCK_UNLOCKED;
++
++
++/*	__alloc_vx_info()
++
++	* allocate an initialized vx_info struct
++	* doesn't make it visible (hash)			*/
++
++static struct vx_info *__alloc_vx_info(xid_t xid)
++{
++	struct vx_info *new = NULL;
++	int cpu;
++
++	vxdprintk(VXD_CBIT(xid, 0), "alloc_vx_info(%d)*", xid);
++
++	/* would this benefit from a slab cache? */
++	new = kmalloc(sizeof(struct vx_info), GFP_KERNEL);
++	if (!new)
++		return 0;
++
++	memset (new, 0, sizeof(struct vx_info));
++#ifdef CONFIG_SMP
++	new->ptr_pc = alloc_percpu(struct _vx_info_pc);
++	if (!new->ptr_pc)
++		goto error;
++#endif
++	new->vx_id = xid;
++	INIT_HLIST_NODE(&new->vx_hlist);
++	atomic_set(&new->vx_usecnt, 0);
++	atomic_set(&new->vx_tasks, 0);
++	new->vx_parent = NULL;
++	new->vx_state = 0;
++	init_waitqueue_head(&new->vx_wait);
++
++	/* prepare reaper */
++	get_task_struct(init_pid_ns.child_reaper);
++	new->vx_reaper = init_pid_ns.child_reaper;
++
++	/* rest of init goes here */
++	vx_info_init_limit(&new->limit);
++	vx_info_init_sched(&new->sched);
++	vx_info_init_cvirt(&new->cvirt);
++	vx_info_init_cacct(&new->cacct);
++
++	/* per cpu data structures */
++	for_each_possible_cpu(cpu) {
++		vx_info_init_sched_pc(
++			&vx_per_cpu(new, sched_pc, cpu), cpu);
++		vx_info_init_cvirt_pc(
++			&vx_per_cpu(new, cvirt_pc, cpu), cpu);
++	}
++
++	new->vx_flags = VXF_INIT_SET;
++	new->vx_bcaps = CAP_INIT_EFF_SET;
++	new->vx_ccaps = 0;
++	new->vx_cap_bset = cap_bset;
++
++	new->reboot_cmd = 0;
++	new->exit_code = 0;
++
++	vxdprintk(VXD_CBIT(xid, 0),
++		"alloc_vx_info(%d) = %p", xid, new);
++	vxh_alloc_vx_info(new);
++	atomic_inc(&vx_global_ctotal);
++	return new;
++#ifdef CONFIG_SMP
++error:
++	kfree(new);
++	return 0;
++#endif
++}
++
++/*	__dealloc_vx_info()
++
++	* final disposal of vx_info				*/
++
++static void __dealloc_vx_info(struct vx_info *vxi)
++{
++	int cpu;
++
++	vxdprintk(VXD_CBIT(xid, 0),
++		"dealloc_vx_info(%p)", vxi);
++	vxh_dealloc_vx_info(vxi);
++
++	vxi->vx_id = -1;
++
++	vx_info_exit_limit(&vxi->limit);
++	vx_info_exit_sched(&vxi->sched);
++	vx_info_exit_cvirt(&vxi->cvirt);
++	vx_info_exit_cacct(&vxi->cacct);
++
++	for_each_possible_cpu(cpu) {
++		vx_info_exit_sched_pc(
++			&vx_per_cpu(vxi, sched_pc, cpu), cpu);
++		vx_info_exit_cvirt_pc(
++			&vx_per_cpu(vxi, cvirt_pc, cpu), cpu);
++	}
++
++	vxi->vx_state |= VXS_RELEASED;
++
++#ifdef CONFIG_SMP
++	free_percpu(vxi->ptr_pc);
++#endif
++	kfree(vxi);
++	atomic_dec(&vx_global_ctotal);
++}
++
++static void __shutdown_vx_info(struct vx_info *vxi)
++{
++	struct nsproxy *nsproxy;
++	struct fs_struct *fs;
++
++	might_sleep();
++
++	vxi->vx_state |= VXS_SHUTDOWN;
++	vs_state_change(vxi, VSC_SHUTDOWN);
++
++	nsproxy = xchg(&vxi->vx_nsproxy, NULL);
++	fs = xchg(&vxi->vx_fs, NULL);
++
++	if (nsproxy)
++		put_nsproxy(nsproxy);
++	if (fs)
++		put_fs_struct(fs);
++}
++
++/* exported stuff */
++
++void free_vx_info(struct vx_info *vxi)
++{
++	unsigned long flags;
++
++	/* context shutdown is mandatory */
++	BUG_ON(!vx_info_state(vxi, VXS_SHUTDOWN));
++
++	BUG_ON(atomic_read(&vxi->vx_usecnt));
++	BUG_ON(atomic_read(&vxi->vx_tasks));
++
++	BUG_ON(vx_info_state(vxi, VXS_HASHED));
++
++	BUG_ON(vxi->vx_nsproxy);
++	BUG_ON(vxi->vx_fs);
++
++	spin_lock_irqsave(&vx_info_inactive_lock, flags);
++	hlist_del(&vxi->vx_hlist);
++	spin_unlock_irqrestore(&vx_info_inactive_lock, flags);
++
++	__dealloc_vx_info(vxi);
++}
++
++
++/*	hash table for vx_info hash */
++
++#define VX_HASH_SIZE	13
++
++static struct hlist_head vx_info_hash[VX_HASH_SIZE] =
++	{ [0 ... VX_HASH_SIZE-1] = HLIST_HEAD_INIT };
++
++static spinlock_t vx_info_hash_lock = SPIN_LOCK_UNLOCKED;
++
++
++static inline unsigned int __hashval(xid_t xid)
++{
++	return (xid % VX_HASH_SIZE);
++}
++
++
++
++/*	__hash_vx_info()
++
++	* add the vxi to the global hash table
++	* requires the hash_lock to be held			*/
++
++static inline void __hash_vx_info(struct vx_info *vxi)
++{
++	struct hlist_head *head;
++
++	vxd_assert_lock(&vx_info_hash_lock);
++	vxdprintk(VXD_CBIT(xid, 4),
++		"__hash_vx_info: %p[#%d]", vxi, vxi->vx_id);
++	vxh_hash_vx_info(vxi);
++
++	/* context must not be hashed */
++	BUG_ON(vx_info_state(vxi, VXS_HASHED));
++
++	vxi->vx_state |= VXS_HASHED;
++	head = &vx_info_hash[__hashval(vxi->vx_id)];
++	hlist_add_head(&vxi->vx_hlist, head);
++	atomic_inc(&vx_global_cactive);
++}
++
++/*	__unhash_vx_info()
++
++	* remove the vxi from the global hash table
++	* requires the hash_lock to be held			*/
++
++static inline void __unhash_vx_info(struct vx_info *vxi)
++{
++	unsigned long flags;
++
++	vxd_assert_lock(&vx_info_hash_lock);
++	vxdprintk(VXD_CBIT(xid, 4),
++		"__unhash_vx_info: %p[#%d.%d.%d]", vxi, vxi->vx_id,
++		atomic_read(&vxi->vx_usecnt), atomic_read(&vxi->vx_tasks));
++	vxh_unhash_vx_info(vxi);
++
++	/* context must be hashed */
++	BUG_ON(!vx_info_state(vxi, VXS_HASHED));
++	/* but without tasks */
++	BUG_ON(atomic_read(&vxi->vx_tasks));
++
++	vxi->vx_state &= ~VXS_HASHED;
++	hlist_del_init(&vxi->vx_hlist);
++	spin_lock_irqsave(&vx_info_inactive_lock, flags);
++	hlist_add_head(&vxi->vx_hlist, &vx_info_inactive);
++	spin_unlock_irqrestore(&vx_info_inactive_lock, flags);
++	atomic_dec(&vx_global_cactive);
++}
++
++
++/*	__lookup_vx_info()
++
++	* requires the hash_lock to be held
++	* doesn't increment the vx_refcnt			*/
++
++static inline struct vx_info *__lookup_vx_info(xid_t xid)
++{
++	struct hlist_head *head = &vx_info_hash[__hashval(xid)];
++	struct hlist_node *pos;
++	struct vx_info *vxi;
++
++	vxd_assert_lock(&vx_info_hash_lock);
++	hlist_for_each(pos, head) {
++		vxi = hlist_entry(pos, struct vx_info, vx_hlist);
++
++		if (vxi->vx_id == xid)
++			goto found;
++	}
++	vxi = NULL;
++found:
++	vxdprintk(VXD_CBIT(xid, 0),
++		"__lookup_vx_info(#%u): %p[#%u]",
++		xid, vxi, vxi?vxi->vx_id:0);
++	vxh_lookup_vx_info(vxi, xid);
++	return vxi;
++}
++
++
++/*	__create_vx_info()
++
++	* create the requested context
++	* get() and hash it					*/
++
++static struct vx_info * __create_vx_info(int id)
++{
++	struct vx_info *new, *vxi = NULL;
++
++	vxdprintk(VXD_CBIT(xid, 1), "create_vx_info(%d)*", id);
++
++	if (!(new = __alloc_vx_info(id)))
++		return ERR_PTR(-ENOMEM);
++
++	/* required to make dynamic xids unique */
++	spin_lock(&vx_info_hash_lock);
++
++	/* static context requested */
++	if ((vxi = __lookup_vx_info(id))) {
++		vxdprintk(VXD_CBIT(xid, 0),
++			"create_vx_info(%d) = %p (already there)", id, vxi);
++		if (vx_info_flags(vxi, VXF_STATE_SETUP, 0))
++			vxi = ERR_PTR(-EBUSY);
++		else
++			vxi = ERR_PTR(-EEXIST);
++		goto out_unlock;
++	}
++	/* new context */
++	vxdprintk(VXD_CBIT(xid, 0),
++		"create_vx_info(%d) = %p (new)", id, new);
++	__hash_vx_info(get_vx_info(new));
++	vxi = new, new = NULL;
++
++out_unlock:
++	spin_unlock(&vx_info_hash_lock);
++	vxh_create_vx_info(IS_ERR(vxi)?NULL:vxi, id);
++	if (new)
++		__dealloc_vx_info(new);
++	return vxi;
++}
++
++
++/*	exported stuff						*/
++
++
++void unhash_vx_info(struct vx_info *vxi)
++{
++	__shutdown_vx_info(vxi);
++	spin_lock(&vx_info_hash_lock);
++	__unhash_vx_info(vxi);
++	spin_unlock(&vx_info_hash_lock);
++	__wakeup_vx_info(vxi);
++}
++
++
++/*	lookup_vx_info()
++
++	* search for a vx_info and get() it
++	* negative id means current				*/
++
++struct vx_info *lookup_vx_info(int id)
++{
++	struct vx_info *vxi = NULL;
++
++	if (id < 0) {
++		vxi = get_vx_info(current->vx_info);
++	} else if (id > 1) {
++		spin_lock(&vx_info_hash_lock);
++		vxi = get_vx_info(__lookup_vx_info(id));
++		spin_unlock(&vx_info_hash_lock);
++	}
++	return vxi;
++}
++
++/*	xid_is_hashed()
++
++	* verify that xid is still hashed			*/
++
++int xid_is_hashed(xid_t xid)
++{
++	int hashed;
++
++	spin_lock(&vx_info_hash_lock);
++	hashed = (__lookup_vx_info(xid) != NULL);
++	spin_unlock(&vx_info_hash_lock);
++	return hashed;
++}
++
++#ifdef	CONFIG_PROC_FS
++
++/*	get_xid_list()
++
++	* get a subset of hashed xids for proc
++	* assumes size is at least one				*/
++
++int get_xid_list(int index, unsigned int *xids, int size)
++{
++	int hindex, nr_xids = 0;
++
++	/* only show current and children */
++	if (!vx_check(0, VS_ADMIN|VS_WATCH)) {
++		if (index > 0)
++			return 0;
++		xids[nr_xids] = vx_current_xid();
++		return 1;
++	}
++
++	for (hindex = 0; hindex < VX_HASH_SIZE; hindex++) {
++		struct hlist_head *head = &vx_info_hash[hindex];
++		struct hlist_node *pos;
++
++		spin_lock(&vx_info_hash_lock);
++		hlist_for_each(pos, head) {
++			struct vx_info *vxi;
++
++			if (--index > 0)
++				continue;
++
++			vxi = hlist_entry(pos, struct vx_info, vx_hlist);
++			xids[nr_xids] = vxi->vx_id;
++			if (++nr_xids >= size) {
++				spin_unlock(&vx_info_hash_lock);
++				goto out;
++			}
++		}
++		/* keep the lock time short */
++		spin_unlock(&vx_info_hash_lock);
++	}
++out:
++	return nr_xids;
++}
++#endif
++
++#ifdef	CONFIG_VSERVER_DEBUG
++
++void	dump_vx_info_inactive(int level)
++{
++	struct hlist_node *entry, *next;
++
++	hlist_for_each_safe(entry, next, &vx_info_inactive) {
++		struct vx_info *vxi =
++			list_entry(entry, struct vx_info, vx_hlist);
++
++		dump_vx_info(vxi, level);
++	}
++}
++
++#endif
++
++int vx_migrate_user(struct task_struct *p, struct vx_info *vxi)
++{
++	struct user_struct *new_user, *old_user;
++
++	if (!p || !vxi)
++		BUG();
++
++	if (vx_info_flags(vxi, VXF_INFO_PRIVATE, 0))
++		return -EACCES;
++
++	new_user = alloc_uid(vxi->vx_id, p->uid);
++	if (!new_user)
++		return -ENOMEM;
++
++	old_user = p->user;
++	if (new_user != old_user) {
++		atomic_inc(&new_user->processes);
++		atomic_dec(&old_user->processes);
++		p->user = new_user;
++	}
++	free_uid(old_user);
++	return 0;
++}
++
++void vx_mask_cap_bset(struct vx_info *vxi, struct task_struct *p)
++{
++	p->cap_effective &= vxi->vx_cap_bset;
++	p->cap_inheritable &= vxi->vx_cap_bset;
++	p->cap_permitted &= vxi->vx_cap_bset;
++}
++
++
++#include <linux/file.h>
++
++static int vx_openfd_task(struct task_struct *tsk)
++{
++	struct files_struct *files = tsk->files;
++	struct fdtable *fdt;
++	const unsigned long *bptr;
++	int count, total;
++
++	/* no rcu_read_lock() because of spin_lock() */
++	spin_lock(&files->file_lock);
++	fdt = files_fdtable(files);
++	bptr = fdt->open_fds->fds_bits;
++	count = fdt->max_fds / (sizeof(unsigned long) * 8);
++	for (total = 0; count > 0; count--) {
++		if (*bptr)
++			total += hweight_long(*bptr);
++		bptr++;
++	}
++	spin_unlock(&files->file_lock);
++	return total;
++}
++
++
++/* 	for *space compatibility */
++
++asmlinkage long sys_unshare(unsigned long);
++
++/*
++ *	migrate task to new context
++ *	gets vxi, puts old_vxi on change
++ *	optionally unshares namespaces (hack)
++ */
++
++int vx_migrate_task(struct task_struct *p, struct vx_info *vxi, int unshare)
++{
++	struct vx_info *old_vxi;
++	int ret = 0;
++
++	if (!p || !vxi)
++		BUG();
++
++	vxdprintk(VXD_CBIT(xid, 5),
++		"vx_migrate_task(%p,%p[#%d.%d])", p, vxi,
++		vxi->vx_id, atomic_read(&vxi->vx_usecnt));
++
++	if (vx_info_flags(vxi, VXF_INFO_PRIVATE, 0) &&
++		!vx_info_flags(vxi, VXF_STATE_SETUP, 0))
++		return -EACCES;
++
++	if (vx_info_state(vxi, VXS_SHUTDOWN))
++		return -EFAULT;
++
++	old_vxi = task_get_vx_info(p);
++	if (old_vxi == vxi)
++		goto out;
++
++	if (!(ret = vx_migrate_user(p, vxi))) {
++		int openfd;
++
++		task_lock(p);
++		openfd = vx_openfd_task(p);
++
++		if (old_vxi) {
++			atomic_dec(&old_vxi->cvirt.nr_threads);
++			atomic_dec(&old_vxi->cvirt.nr_running);
++			__rlim_dec(&old_vxi->limit, RLIMIT_NPROC);
++			/* FIXME: what about the struct files here? */
++			__rlim_sub(&old_vxi->limit, VLIMIT_OPENFD, openfd);
++			/* account for the executable */
++			__rlim_dec(&old_vxi->limit, VLIMIT_DENTRY);
++		}
++		atomic_inc(&vxi->cvirt.nr_threads);
++		atomic_inc(&vxi->cvirt.nr_running);
++		__rlim_inc(&vxi->limit, RLIMIT_NPROC);
++		/* FIXME: what about the struct files here? */
++		__rlim_add(&vxi->limit, VLIMIT_OPENFD, openfd);
++		/* account for the executable */
++		__rlim_inc(&vxi->limit, VLIMIT_DENTRY);
++
++		if (old_vxi) {
++			release_vx_info(old_vxi, p);
++			clr_vx_info(&p->vx_info);
++		}
++		claim_vx_info(vxi, p);
++		set_vx_info(&p->vx_info, vxi);
++		p->xid = vxi->vx_id;
++
++		vxdprintk(VXD_CBIT(xid, 5),
++			"moved task %p into vxi:%p[#%d]",
++			p, vxi, vxi->vx_id);
++
++		vx_mask_cap_bset(vxi, p);
++		task_unlock(p);
++
++		/* hack for *spaces to provide compatibility */
++		if (unshare) {
++			ret = sys_unshare(CLONE_NEWUTS|CLONE_NEWIPC);
++			vx_set_space(vxi, CLONE_NEWUTS|CLONE_NEWIPC);
++		}
++	}
++out:
++	put_vx_info(old_vxi);
++	return ret;
++}
++
++int vx_set_reaper(struct vx_info *vxi, struct task_struct *p)
++{
++	struct task_struct *old_reaper;
++
++	if (!vxi)
++		return -EINVAL;
++
++	vxdprintk(VXD_CBIT(xid, 6),
++		"vx_set_reaper(%p[#%d],%p[#%d,%d])",
++		vxi, vxi->vx_id, p, p->xid, p->pid);
++
++	old_reaper = vxi->vx_reaper;
++	if (old_reaper == p)
++		return 0;
++
++	/* set new child reaper */
++	get_task_struct(p);
++	vxi->vx_reaper = p;
++	put_task_struct(old_reaper);
++	return 0;
++}
++
++int vx_set_init(struct vx_info *vxi, struct task_struct *p)
++{
++	if (!vxi)
++		return -EINVAL;
++
++	vxdprintk(VXD_CBIT(xid, 6),
++		"vx_set_init(%p[#%d],%p[#%d,%d,%d])",
++		vxi, vxi->vx_id, p, p->xid, p->pid, p->tgid);
++
++	vxi->vx_flags &= ~VXF_STATE_INIT;
++	vxi->vx_initpid = p->tgid;
++	return 0;
++}
++
++void vx_exit_init(struct vx_info *vxi, struct task_struct *p, int code)
++{
++	vxdprintk(VXD_CBIT(xid, 6),
++		"vx_exit_init(%p[#%d],%p[#%d,%d,%d])",
++		vxi, vxi->vx_id, p, p->xid, p->pid, p->tgid);
++
++	vxi->exit_code = code;
++	vxi->vx_initpid = 0;
++}
++
++
++void vx_set_persistent(struct vx_info *vxi)
++{
++	vxdprintk(VXD_CBIT(xid, 6),
++		"vx_set_persistent(%p[#%d])", vxi, vxi->vx_id);
++
++	get_vx_info(vxi);
++	claim_vx_info(vxi, current);
++}
++
++void vx_clear_persistent(struct vx_info *vxi)
++{
++	vxdprintk(VXD_CBIT(xid, 6),
++		"vx_clear_persistent(%p[#%d])", vxi, vxi->vx_id);
++
++	release_vx_info(vxi, current);
++	put_vx_info(vxi);
++}
++
++void vx_update_persistent(struct vx_info *vxi)
++{
++	if (vx_info_flags(vxi, VXF_PERSISTENT, 0))
++		vx_set_persistent(vxi);
++	else
++		vx_clear_persistent(vxi);
++}
++
++
++/*	task must be current or locked		*/
++
++void	exit_vx_info(struct task_struct *p, int code)
++{
++	struct vx_info *vxi = p->vx_info;
++
++	if (vxi) {
++		atomic_dec(&vxi->cvirt.nr_threads);
++		vx_nproc_dec(p);
++
++		vxi->exit_code = code;
++		release_vx_info(vxi, p);
++	}
++}
++
++void	exit_vx_info_early(struct task_struct *p, int code)
++{
++	struct vx_info *vxi = p->vx_info;
++
++	if (vxi) {
++		if (vxi->vx_initpid == p->tgid)
++			vx_exit_init(vxi, p, code);
++		if (vxi->vx_reaper == p)
++			vx_set_reaper(vxi, init_pid_ns.child_reaper);
++	}
++}
++
++
++/* vserver syscall commands below here */
++
++/* taks xid and vx_info functions */
++
++#include <asm/uaccess.h>
++
++
++int vc_task_xid(uint32_t id, void __user *data)
++{
++	xid_t xid;
++
++	if (id) {
++		struct task_struct *tsk;
++
++		if (!vx_check(0, VS_ADMIN|VS_WATCH))
++			return -EPERM;
++
++		read_lock(&tasklist_lock);
++		tsk = find_task_by_real_pid(id);
++		xid = (tsk) ? tsk->xid : -ESRCH;
++		read_unlock(&tasklist_lock);
++	}
++	else
++		xid = vx_current_xid();
++	return xid;
++}
++
++
++int vc_vx_info(struct vx_info *vxi, void __user *data)
++{
++	struct vcmd_vx_info_v0 vc_data;
++
++	vc_data.xid = vxi->vx_id;
++	vc_data.initpid = vxi->vx_initpid;
++
++	if (copy_to_user (data, &vc_data, sizeof(vc_data)))
++		return -EFAULT;
++	return 0;
++}
++
++
++int vc_ctx_stat(struct vx_info *vxi, void __user *data)
++{
++	struct vcmd_ctx_stat_v0 vc_data;
++
++	vc_data.usecnt = atomic_read(&vxi->vx_usecnt);
++	vc_data.tasks = atomic_read(&vxi->vx_tasks);
++
++	if (copy_to_user (data, &vc_data, sizeof(vc_data)))
++		return -EFAULT;
++	return 0;
++}
++
++
++/* context functions */
++
++int vc_ctx_create(uint32_t xid, void __user *data)
++{
++	struct vcmd_ctx_create vc_data = { .flagword = VXF_INIT_SET };
++	struct vx_info *new_vxi;
++	int ret;
++
++	if (data && copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	if ((xid > MAX_S_CONTEXT) || (xid < 2))
++		return -EINVAL;
++
++	new_vxi = __create_vx_info(xid);
++	if (IS_ERR(new_vxi))
++		return PTR_ERR(new_vxi);
++
++	/* initial flags */
++	new_vxi->vx_flags = vc_data.flagword;
++
++	/* get a reference for persistent contexts */
++	if ((vc_data.flagword & VXF_PERSISTENT))
++		vx_set_persistent(new_vxi);
++
++	ret = -ENOEXEC;
++	if (vs_state_change(new_vxi, VSC_STARTUP))
++		goto out_err;
++
++	ret = vx_migrate_task(current, new_vxi, (!data));
++	if (!ret) {
++		/* return context id on success */
++		ret = new_vxi->vx_id;
++		goto out;
++	}
++out_err:
++	/* prepare for context disposal */
++	new_vxi->vx_state |= VXS_SHUTDOWN;
++	new_vxi->vx_flags &= ~VXF_PERSISTENT;
++	if ((vc_data.flagword & VXF_PERSISTENT))
++		vx_clear_persistent(new_vxi);
++out:
++	put_vx_info(new_vxi);
++	return ret;
++}
++
++
++int vc_ctx_migrate(struct vx_info *vxi, void __user *data)
++{
++	struct vcmd_ctx_migrate vc_data = { .flagword = 0 };
++	int ret;
++
++	if (data && copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	ret = vx_migrate_task(current, vxi, 0);
++	if (ret)
++		return ret;
++	if (vc_data.flagword & VXM_SET_INIT)
++		ret = vx_set_init(vxi, current);
++	if (ret)
++		return ret;
++	if (vc_data.flagword & VXM_SET_REAPER)
++		ret = vx_set_reaper(vxi, current);
++	return ret;
++}
++
++
++int vc_get_cflags(struct vx_info *vxi, void __user *data)
++{
++	struct vcmd_ctx_flags_v0 vc_data;
++
++	vc_data.flagword = vxi->vx_flags;
++
++	/* special STATE flag handling */
++	vc_data.mask = vs_mask_flags(~0UL, vxi->vx_flags, VXF_ONE_TIME);
++
++	if (copy_to_user (data, &vc_data, sizeof(vc_data)))
++		return -EFAULT;
++	return 0;
++}
++
++int vc_set_cflags(struct vx_info *vxi, void __user *data)
++{
++	struct vcmd_ctx_flags_v0 vc_data;
++	uint64_t mask, trigger;
++
++	if (copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	/* special STATE flag handling */
++	mask = vs_mask_mask(vc_data.mask, vxi->vx_flags, VXF_ONE_TIME);
++	trigger = (mask & vxi->vx_flags) ^ (mask & vc_data.flagword);
++
++	if (vxi == current->vx_info) {
++		if (trigger & VXF_STATE_SETUP)
++			vx_mask_cap_bset(vxi, current);
++		if (trigger & VXF_STATE_INIT) {
++			int ret;
++
++			ret = vx_set_init(vxi, current);
++			if (ret)
++				return ret;
++			ret = vx_set_reaper(vxi, current);
++			if (ret)
++				return ret;
++		}
++	}
++
++	vxi->vx_flags = vs_mask_flags(vxi->vx_flags,
++		vc_data.flagword, mask);
++	if (trigger & VXF_PERSISTENT)
++		vx_update_persistent(vxi);
++
++	return 0;
++}
++
++static int do_get_caps(struct vx_info *vxi, uint64_t *bcaps, uint64_t *ccaps)
++{
++	if (bcaps)
++		*bcaps = vxi->vx_bcaps;
++	if (ccaps)
++		*ccaps = vxi->vx_ccaps;
++
++	return 0;
++}
++
++int vc_get_ccaps_v0(struct vx_info *vxi, void __user *data)
++{
++	struct vcmd_ctx_caps_v0 vc_data;
++	int ret;
++
++	ret = do_get_caps(vxi, &vc_data.bcaps, &vc_data.ccaps);
++	if (ret)
++		return ret;
++	vc_data.cmask = ~0UL;
++
++	if (copy_to_user (data, &vc_data, sizeof(vc_data)))
++		return -EFAULT;
++	return 0;
++}
++
++int vc_get_ccaps(struct vx_info *vxi, void __user *data)
++{
++	struct vcmd_ctx_caps_v1 vc_data;
++	int ret;
++
++	ret = do_get_caps(vxi, NULL, &vc_data.ccaps);
++	if (ret)
++		return ret;
++	vc_data.cmask = ~0UL;
++
++	if (copy_to_user (data, &vc_data, sizeof(vc_data)))
++		return -EFAULT;
++	return 0;
++}
++
++static int do_set_caps(struct vx_info *vxi,
++	uint64_t bcaps, uint64_t bmask, uint64_t ccaps, uint64_t cmask)
++{
++	vxi->vx_bcaps = vs_mask_flags(vxi->vx_bcaps, bcaps, bmask);
++	vxi->vx_ccaps = vs_mask_flags(vxi->vx_ccaps, ccaps, cmask);
++
++	return 0;
++}
++
++int vc_set_ccaps_v0(struct vx_info *vxi, void __user *data)
++{
++	struct vcmd_ctx_caps_v0 vc_data;
++
++	if (copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	/* simulate old &= behaviour for bcaps */
++	return do_set_caps(vxi, 0, ~vc_data.bcaps,
++		vc_data.ccaps, vc_data.cmask);
++}
++
++int vc_set_ccaps(struct vx_info *vxi, void __user *data)
++{
++	struct vcmd_ctx_caps_v1 vc_data;
++
++	if (copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	return do_set_caps(vxi, 0, 0, vc_data.ccaps, vc_data.cmask);
++}
++
++int vc_get_bcaps(struct vx_info *vxi, void __user *data)
++{
++	struct vcmd_bcaps vc_data;
++	int ret;
++
++	ret = do_get_caps(vxi, &vc_data.bcaps, NULL);
++	if (ret)
++		return ret;
++	vc_data.bmask = ~0UL;
++
++	if (copy_to_user (data, &vc_data, sizeof(vc_data)))
++		return -EFAULT;
++	return 0;
++}
++
++int vc_set_bcaps(struct vx_info *vxi, void __user *data)
++{
++	struct vcmd_bcaps vc_data;
++
++	if (copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	return do_set_caps(vxi, vc_data.bcaps, vc_data.bmask, 0, 0);
++}
++
++#include <linux/module.h>
++
++EXPORT_SYMBOL_GPL(free_vx_info);
++
+Index: linux-2.6.20/kernel/vserver/cvirt.c
+===================================================================
+--- /dev/null
++++ linux-2.6.20/kernel/vserver/cvirt.c
+@@ -0,0 +1,305 @@
++/*
++ *  linux/kernel/vserver/cvirt.c
++ *
++ *  Virtual Server: Context Virtualization
++ *
++ *  Copyright (C) 2004-2006  Herbert Pötzl
++ *
++ *  V0.01  broken out from limit.c
++ *  V0.02  added utsname stuff
++ *  V0.03  changed vcmds to vxi arg
++ *
++ */
++
++#include <linux/sched.h>
++#include <linux/sysctl.h>
++#include <linux/types.h>
++#include <linux/vs_context.h>
++#include <linux/vs_cvirt.h>
++#include <linux/vserver/switch.h>
++#include <linux/vserver/cvirt_cmd.h>
++//#include <linux/vserver/cacct_cmd.h>
++
++#include <asm/errno.h>
++#include <asm/uaccess.h>
++
++
++void vx_vsi_uptime(struct timespec *uptime, struct timespec *idle)
++{
++	struct vx_info *vxi = current->vx_info;
++
++	set_normalized_timespec(uptime,
++		uptime->tv_sec - vxi->cvirt.bias_uptime.tv_sec,
++		uptime->tv_nsec - vxi->cvirt.bias_uptime.tv_nsec);
++	if (!idle)
++		return;
++	set_normalized_timespec(idle,
++		idle->tv_sec - vxi->cvirt.bias_idle.tv_sec,
++		idle->tv_nsec - vxi->cvirt.bias_idle.tv_nsec);
++	return;
++}
++
++uint64_t vx_idle_jiffies(void)
++{
++	return init_task.utime + init_task.stime;
++}
++
++
++
++static inline uint32_t __update_loadavg(uint32_t load,
++	int wsize, int delta, int n)
++{
++	unsigned long long calc, prev;
++
++	/* just set it to n */
++	if (unlikely(delta >= wsize))
++		return (n << FSHIFT);
++
++	calc = delta * n;
++	calc <<= FSHIFT;
++	prev = (wsize - delta);
++	prev *= load;
++	calc += prev;
++	do_div(calc, wsize);
++	return calc;
++}
++
++
++void vx_update_load(struct vx_info *vxi)
++{
++	uint32_t now, last, delta;
++	unsigned int nr_running, nr_uninterruptible;
++	unsigned int total;
++	unsigned long flags;
++
++	spin_lock_irqsave(&vxi->cvirt.load_lock, flags);
++
++	now = jiffies;
++	last = vxi->cvirt.load_last;
++	delta = now - last;
++
++	if (delta < 5*HZ)
++		goto out;
++
++	nr_running = atomic_read(&vxi->cvirt.nr_running);
++	nr_uninterruptible = atomic_read(&vxi->cvirt.nr_uninterruptible);
++	total = nr_running + nr_uninterruptible;
++
++	vxi->cvirt.load[0] = __update_loadavg(vxi->cvirt.load[0],
++		60*HZ, delta, total);
++	vxi->cvirt.load[1] = __update_loadavg(vxi->cvirt.load[1],
++		5*60*HZ, delta, total);
++	vxi->cvirt.load[2] = __update_loadavg(vxi->cvirt.load[2],
++		15*60*HZ, delta, total);
++
++	vxi->cvirt.load_last = now;
++out:
++	atomic_inc(&vxi->cvirt.load_updates);
++	spin_unlock_irqrestore(&vxi->cvirt.load_lock, flags);
++}
++
++
++/*
++ * Commands to do_syslog:
++ *
++ *      0 -- Close the log.  Currently a NOP.
++ *      1 -- Open the log. Currently a NOP.
++ *      2 -- Read from the log.
++ *      3 -- Read all messages remaining in the ring buffer.
++ *      4 -- Read and clear all messages remaining in the ring buffer
++ *      5 -- Clear ring buffer.
++ *      6 -- Disable printk's to console
++ *      7 -- Enable printk's to console
++ *      8 -- Set level of messages printed to console
++ *      9 -- Return number of unread characters in the log buffer
++ *     10 -- Return size of the log buffer
++ */
++int vx_do_syslog(int type, char __user *buf, int len)
++{
++	int error = 0;
++	int do_clear = 0;
++	struct vx_info *vxi = current->vx_info;
++	struct _vx_syslog *log;
++
++	if (!vxi)
++		return -EINVAL;
++	log = &vxi->cvirt.syslog;
++
++	switch (type) {
++	case 0:		/* Close log */
++	case 1:		/* Open log */
++		break;
++	case 2:		/* Read from log */
++		error = wait_event_interruptible(log->log_wait,
++			(log->log_start - log->log_end));
++		if (error)
++			break;
++		spin_lock_irq(&log->logbuf_lock);
++		spin_unlock_irq(&log->logbuf_lock);
++		break;
++	case 4:		/* Read/clear last kernel messages */
++		do_clear = 1;
++		/* fall through */
++	case 3:		/* Read last kernel messages */
++		return 0;
++
++	case 5:		/* Clear ring buffer */
++		return 0;
++
++	case 6:		/* Disable logging to console */
++	case 7:		/* Enable logging to console */
++	case 8:		/* Set level of messages printed to console */
++		break;
++
++	case 9:		/* Number of chars in the log buffer */
++		return 0;
++	case 10:	/* Size of the log buffer */
++		return 0;
++	default:
++		error = -EINVAL;
++		break;
++	}
++	return error;
++}
++
++
++/* virtual host info names */
++
++static char * vx_vhi_name(struct vx_info *vxi, int id)
++{
++	struct nsproxy *nsproxy;
++	struct uts_namespace *uts;
++
++
++	if (id == VHIN_CONTEXT)
++		return vxi->vx_name;
++
++	nsproxy = vxi->vx_nsproxy;
++	if (!nsproxy)
++		return NULL;
++
++	uts = nsproxy->uts_ns;
++	if (!uts)
++		return NULL;
++
++	switch (id) {
++	case VHIN_SYSNAME:
++		return uts->name.sysname;
++	case VHIN_NODENAME:
++		return uts->name.nodename;
++	case VHIN_RELEASE:
++		return uts->name.release;
++	case VHIN_VERSION:
++		return uts->name.version;
++	case VHIN_MACHINE:
++		return uts->name.machine;
++	case VHIN_DOMAINNAME:
++		return uts->name.domainname;
++	default:
++		return NULL;
++	}
++	return NULL;
++}
++
++int vc_set_vhi_name(struct vx_info *vxi, void __user *data)
++{
++	struct vcmd_vhi_name_v0 vc_data;
++	char *name;
++
++	if (copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	name = vx_vhi_name(vxi, vc_data.field);
++	if (!name)
++		return -EINVAL;
++
++	memcpy(name, vc_data.name, 65);
++	return 0;
++}
++
++int vc_get_vhi_name(struct vx_info *vxi, void __user *data)
++{
++	struct vcmd_vhi_name_v0 vc_data;
++	char *name;
++
++	if (copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	name = vx_vhi_name(vxi, vc_data.field);
++	if (!name)
++		return -EINVAL;
++
++	memcpy(vc_data.name, name, 65);
++	if (copy_to_user (data, &vc_data, sizeof(vc_data)))
++		return -EFAULT;
++	return 0;
++}
++
++
++int vc_virt_stat(struct vx_info *vxi, void __user *data)
++{
++	struct vcmd_virt_stat_v0 vc_data;
++	struct _vx_cvirt *cvirt = &vxi->cvirt;
++	struct timespec uptime;
++
++	do_posix_clock_monotonic_gettime(&uptime);
++	set_normalized_timespec(&uptime,
++		uptime.tv_sec - cvirt->bias_uptime.tv_sec,
++		uptime.tv_nsec - cvirt->bias_uptime.tv_nsec);
++
++	vc_data.offset = timeval_to_ns(&cvirt->bias_tv);
++	vc_data.uptime = timespec_to_ns(&uptime);
++	vc_data.nr_threads = atomic_read(&cvirt->nr_threads);
++	vc_data.nr_running = atomic_read(&cvirt->nr_running);
++	vc_data.nr_uninterruptible = atomic_read(&cvirt->nr_uninterruptible);
++	vc_data.nr_onhold = atomic_read(&cvirt->nr_onhold);
++	vc_data.nr_forks = atomic_read(&cvirt->total_forks);
++	vc_data.load[0] = cvirt->load[0];
++	vc_data.load[1] = cvirt->load[1];
++	vc_data.load[2] = cvirt->load[2];
++
++	if (copy_to_user (data, &vc_data, sizeof(vc_data)))
++		return -EFAULT;
++	return 0;
++}
++
++
++#ifdef CONFIG_VSERVER_VTIME
++
++/* virtualized time base */
++
++void vx_gettimeofday(struct timeval *tv)
++{
++	do_gettimeofday(tv);
++	if (!vx_flags(VXF_VIRT_TIME, 0))
++		return;
++
++	tv->tv_sec += current->vx_info->cvirt.bias_tv.tv_sec;
++	tv->tv_usec += current->vx_info->cvirt.bias_tv.tv_usec;
++
++	if (tv->tv_usec >= USEC_PER_SEC) {
++		tv->tv_sec++;
++		tv->tv_usec -= USEC_PER_SEC;
++	} else if (tv->tv_usec < 0) {
++		tv->tv_sec--;
++		tv->tv_usec += USEC_PER_SEC;
++	}
++}
++
++int vx_settimeofday(struct timespec *ts)
++{
++	struct timeval tv;
++
++	if (!vx_flags(VXF_VIRT_TIME, 0))
++		return do_settimeofday(ts);
++
++	do_gettimeofday(&tv);
++	current->vx_info->cvirt.bias_tv.tv_sec =
++		ts->tv_sec - tv.tv_sec;
++	current->vx_info->cvirt.bias_tv.tv_usec =
++		(ts->tv_nsec/NSEC_PER_USEC) - tv.tv_usec;
++	return 0;
++}
++
++#endif
++
+Index: linux-2.6.20/kernel/vserver/cvirt_init.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/kernel/vserver/cvirt_init.h
+@@ -0,0 +1,71 @@
++
++
++extern uint64_t vx_idle_jiffies(void);
++
++static inline void vx_info_init_cvirt(struct _vx_cvirt *cvirt)
++{
++	uint64_t idle_jiffies = vx_idle_jiffies();
++	uint64_t nsuptime;
++
++	do_posix_clock_monotonic_gettime(&cvirt->bias_uptime);
++	nsuptime = (unsigned long long)cvirt->bias_uptime.tv_sec
++		* NSEC_PER_SEC + cvirt->bias_uptime.tv_nsec;
++	cvirt->bias_clock = nsec_to_clock_t(nsuptime);
++	cvirt->bias_tv.tv_sec = 0;
++	cvirt->bias_tv.tv_usec = 0;
++
++	jiffies_to_timespec(idle_jiffies, &cvirt->bias_idle);
++	atomic_set(&cvirt->nr_threads, 0);
++	atomic_set(&cvirt->nr_running, 0);
++	atomic_set(&cvirt->nr_uninterruptible, 0);
++	atomic_set(&cvirt->nr_onhold, 0);
++
++	spin_lock_init(&cvirt->load_lock);
++	cvirt->load_last = jiffies;
++	atomic_set(&cvirt->load_updates, 0);
++	cvirt->load[0] = 0;
++	cvirt->load[1] = 0;
++	cvirt->load[2] = 0;
++	atomic_set(&cvirt->total_forks, 0);
++
++	spin_lock_init(&cvirt->syslog.logbuf_lock);
++	init_waitqueue_head(&cvirt->syslog.log_wait);
++	cvirt->syslog.log_start = 0;
++	cvirt->syslog.log_end = 0;
++	cvirt->syslog.con_start = 0;
++	cvirt->syslog.logged_chars = 0;
++}
++
++static inline
++void vx_info_init_cvirt_pc(struct _vx_cvirt_pc *cvirt_pc, int cpu)
++{
++	// cvirt_pc->cpustat = { 0 };
++}
++
++static inline void vx_info_exit_cvirt(struct _vx_cvirt *cvirt)
++{
++#ifdef	CONFIG_VSERVER_DEBUG
++	int value;
++
++	vxwprintk((value = atomic_read(&cvirt->nr_threads)),
++		"!!! cvirt: %p[nr_threads] = %d on exit.",
++		cvirt, value);
++	vxwprintk((value = atomic_read(&cvirt->nr_running)),
++		"!!! cvirt: %p[nr_running] = %d on exit.",
++		cvirt, value);
++	vxwprintk((value = atomic_read(&cvirt->nr_uninterruptible)),
++		"!!! cvirt: %p[nr_uninterruptible] = %d on exit.",
++		cvirt, value);
++	vxwprintk((value = atomic_read(&cvirt->nr_onhold)),
++		"!!! cvirt: %p[nr_onhold] = %d on exit.",
++		cvirt, value);
++#endif
++	return;
++}
++
++static inline
++void vx_info_exit_cvirt_pc(struct _vx_cvirt_pc *cvirt_pc, int cpu)
++{
++	return;
++}
++
+Index: linux-2.6.20/kernel/vserver/cvirt_proc.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/kernel/vserver/cvirt_proc.h
+@@ -0,0 +1,138 @@
++#ifndef _VX_CVIRT_PROC_H
++#define _VX_CVIRT_PROC_H
++
++#include <linux/nsproxy.h>
++#include <linux/mnt_namespace.h>
++#include <linux/utsname.h>
++#include <linux/ipc.h>
++
++
++static inline
++int vx_info_proc_nsproxy(struct nsproxy *nsproxy, char *buffer)
++{
++	struct mnt_namespace *ns;
++	struct uts_namespace *uts;
++	struct ipc_namespace *ipc;
++	struct vfsmount *mnt;
++	char *path, *root;
++	int length = 0;
++
++	if (!nsproxy)
++		goto out;
++
++	length += sprintf(buffer + length,
++		"NSProxy:\t%p [%p,%p,%p]\n",
++		nsproxy, nsproxy->mnt_ns,
++		nsproxy->uts_ns, nsproxy->ipc_ns);
++
++	ns = nsproxy->mnt_ns;
++	if (!ns)
++		goto skip_ns;
++
++	path = kmalloc(PATH_MAX, GFP_KERNEL);
++	if (!path)
++		goto skip_ns;
++
++	mnt = ns->root;
++	root = d_path(mnt->mnt_root, mnt->mnt_parent, path, PATH_MAX-2);
++	length += sprintf(buffer + length,
++		"Namespace:\t%p [#%u]\n"
++		"RootPath:\t%s\n"
++		,ns , atomic_read(&ns->count)
++		,root);
++	kfree(path);
++skip_ns:
++
++	uts = nsproxy->uts_ns;
++	if (!uts)
++		goto skip_uts;
++
++	length += sprintf(buffer + length,
++		"SysName:\t%.*s\n"
++		"NodeName:\t%.*s\n"
++		"Release:\t%.*s\n"
++		"Version:\t%.*s\n"
++		"Machine:\t%.*s\n"
++		"DomainName:\t%.*s\n"
++		,__NEW_UTS_LEN, uts->name.sysname
++		,__NEW_UTS_LEN, uts->name.nodename
++		,__NEW_UTS_LEN, uts->name.release
++		,__NEW_UTS_LEN, uts->name.version
++		,__NEW_UTS_LEN, uts->name.machine
++		,__NEW_UTS_LEN, uts->name.domainname
++		);
++skip_uts:
++
++	ipc = nsproxy->ipc_ns;
++	if (!ipc)
++		goto skip_ipc;
++
++	length += sprintf(buffer + length,
++		"SEMS:\t\t%d %d %d %d  %d\n"
++		"MSG:\t\t%d %d %d\n"
++		"SHM:\t\t%lu %lu  %d %d\n"
++		,ipc->sem_ctls[0], ipc->sem_ctls[1]
++		,ipc->sem_ctls[2], ipc->sem_ctls[3]
++		,ipc->used_sems
++		,ipc->msg_ctlmax, ipc->msg_ctlmnb, ipc->msg_ctlmni
++		,(unsigned long)ipc->shm_ctlmax
++		,(unsigned long)ipc->shm_ctlall
++		,ipc->shm_ctlmni, ipc->shm_tot
++		);
++skip_ipc:
++
++out:
++	return length;
++}
++
++
++#include <linux/sched.h>
++
++#define LOAD_INT(x) ((x) >> FSHIFT)
++#define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
++
++static inline
++int vx_info_proc_cvirt(struct _vx_cvirt *cvirt, char *buffer)
++{
++	int length = 0;
++	int a, b, c;
++
++	length += sprintf(buffer + length,
++		"BiasUptime:\t%lu.%02lu\n",
++			(unsigned long)cvirt->bias_uptime.tv_sec,
++			(cvirt->bias_uptime.tv_nsec / (NSEC_PER_SEC / 100)));
++
++	a = cvirt->load[0] + (FIXED_1/200);
++	b = cvirt->load[1] + (FIXED_1/200);
++	c = cvirt->load[2] + (FIXED_1/200);
++	length += sprintf(buffer + length,
++		"nr_threads:\t%d\n"
++		"nr_running:\t%d\n"
++		"nr_unintr:\t%d\n"
++		"nr_onhold:\t%d\n"
++		"load_updates:\t%d\n"
++		"loadavg:\t%d.%02d %d.%02d %d.%02d\n"
++		"total_forks:\t%d\n"
++		,atomic_read(&cvirt->nr_threads)
++		,atomic_read(&cvirt->nr_running)
++		,atomic_read(&cvirt->nr_uninterruptible)
++		,atomic_read(&cvirt->nr_onhold)
++		,atomic_read(&cvirt->load_updates)
++		,LOAD_INT(a), LOAD_FRAC(a)
++		,LOAD_INT(b), LOAD_FRAC(b)
++		,LOAD_INT(c), LOAD_FRAC(c)
++		,atomic_read(&cvirt->total_forks)
++		);
++
++	return length;
++}
++
++static inline
++int vx_info_proc_cvirt_pc(struct _vx_cvirt_pc *cvirt_pc,
++	char *buffer, int cpu)
++{
++	int length = 0;
++	return length;
++}
++
++#endif	/* _VX_CVIRT_PROC_H */
+Index: linux-2.6.20/kernel/vserver/debug.c
+===================================================================
+--- /dev/null
++++ linux-2.6.20/kernel/vserver/debug.c
+@@ -0,0 +1,35 @@
++/*
++ *  kernel/vserver/debug.c
++ *
++ *  Copyright (C) 2005  Herbert Pötzl
++ *
++ *  V0.01  vx_info dump support
++ *
++ */
++
++#include <linux/errno.h>
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/vs_base.h>
++
++#include <linux/vserver/context.h>
++
++
++void	dump_vx_info(struct vx_info *vxi, int level)
++{
++	printk("vx_info %p[#%d, %d.%d, %4x]\n", vxi, vxi->vx_id,
++		atomic_read(&vxi->vx_usecnt),
++		atomic_read(&vxi->vx_tasks),
++		vxi->vx_state);
++	if (level > 0) {
++		__dump_vx_limit(&vxi->limit);
++		__dump_vx_sched(&vxi->sched);
++		__dump_vx_cvirt(&vxi->cvirt);
++		__dump_vx_cacct(&vxi->cacct);
++	}
++	printk("---\n");
++}
++
++
++EXPORT_SYMBOL_GPL(dump_vx_info);
++
+Index: linux-2.6.20/kernel/vserver/dlimit.c
+===================================================================
+--- /dev/null
++++ linux-2.6.20/kernel/vserver/dlimit.c
+@@ -0,0 +1,527 @@
++/*
++ *  linux/kernel/vserver/dlimit.c
++ *
++ *  Virtual Server: Context Disk Limits
++ *
++ *  Copyright (C) 2004-2005  Herbert Pötzl
++ *
++ *  V0.01  initial version
++ *  V0.02  compat32 splitup
++ *
++ */
++
++#include <linux/fs.h>
++// #include <linux/mnt_namespace.h>
++#include <linux/namei.h>
++#include <linux/statfs.h>
++#include <linux/compat.h>
++#include <linux/vserver/switch.h>
++#include <linux/vs_context.h>
++#include <linux/vs_tag.h>
++#include <linux/vs_dlimit.h>
++#include <linux/vserver/dlimit_cmd.h>
++
++#include <asm/errno.h>
++#include <asm/uaccess.h>
++
++/*	__alloc_dl_info()
++
++	* allocate an initialized dl_info struct
++	* doesn't make it visible (hash)			*/
++
++static struct dl_info *__alloc_dl_info(struct super_block *sb, tag_t tag)
++{
++	struct dl_info *new = NULL;
++
++	vxdprintk(VXD_CBIT(dlim, 5),
++		"alloc_dl_info(%p,%d)*", sb, tag);
++
++	/* would this benefit from a slab cache? */
++	new = kmalloc(sizeof(struct dl_info), GFP_KERNEL);
++	if (!new)
++		return 0;
++
++	memset (new, 0, sizeof(struct dl_info));
++	new->dl_tag = tag;
++	new->dl_sb = sb;
++	INIT_RCU_HEAD(&new->dl_rcu);
++	INIT_HLIST_NODE(&new->dl_hlist);
++	spin_lock_init(&new->dl_lock);
++	atomic_set(&new->dl_refcnt, 0);
++	atomic_set(&new->dl_usecnt, 0);
++
++	/* rest of init goes here */
++
++	vxdprintk(VXD_CBIT(dlim, 4),
++		"alloc_dl_info(%p,%d) = %p", sb, tag, new);
++	return new;
++}
++
++/*	__dealloc_dl_info()
++
++	* final disposal of dl_info				*/
++
++static void __dealloc_dl_info(struct dl_info *dli)
++{
++	vxdprintk(VXD_CBIT(dlim, 4),
++		"dealloc_dl_info(%p)", dli);
++
++	dli->dl_hlist.next = LIST_POISON1;
++	dli->dl_tag = -1;
++	dli->dl_sb = 0;
++
++	BUG_ON(atomic_read(&dli->dl_usecnt));
++	BUG_ON(atomic_read(&dli->dl_refcnt));
++
++	kfree(dli);
++}
++
++
++/*	hash table for dl_info hash */
++
++#define DL_HASH_SIZE	13
++
++struct hlist_head dl_info_hash[DL_HASH_SIZE];
++
++static spinlock_t dl_info_hash_lock = SPIN_LOCK_UNLOCKED;
++
++
++static inline unsigned int __hashval(struct super_block *sb, tag_t tag)
++{
++	return ((tag ^ (unsigned long)sb) % DL_HASH_SIZE);
++}
++
++
++
++/*	__hash_dl_info()
++
++	* add the dli to the global hash table
++	* requires the hash_lock to be held			*/
++
++static inline void __hash_dl_info(struct dl_info *dli)
++{
++	struct hlist_head *head;
++
++	vxdprintk(VXD_CBIT(dlim, 6),
++		"__hash_dl_info: %p[#%d]", dli, dli->dl_tag);
++	get_dl_info(dli);
++	head = &dl_info_hash[__hashval(dli->dl_sb, dli->dl_tag)];
++	hlist_add_head_rcu(&dli->dl_hlist, head);
++}
++
++/*	__unhash_dl_info()
++
++	* remove the dli from the global hash table
++	* requires the hash_lock to be held			*/
++
++static inline void __unhash_dl_info(struct dl_info *dli)
++{
++	vxdprintk(VXD_CBIT(dlim, 6),
++		"__unhash_dl_info: %p[#%d]", dli, dli->dl_tag);
++	hlist_del_rcu(&dli->dl_hlist);
++	put_dl_info(dli);
++}
++
++
++/*	__lookup_dl_info()
++
++	* requires the rcu_read_lock()
++	* doesn't increment the dl_refcnt			*/
++
++static inline struct dl_info *__lookup_dl_info(struct super_block *sb, tag_t tag)
++{
++	struct hlist_head *head = &dl_info_hash[__hashval(sb, tag)];
++	struct hlist_node *pos;
++	struct dl_info *dli;
++
++	hlist_for_each_entry_rcu(dli, pos, head, dl_hlist) {
++
++		if (dli->dl_tag == tag && dli->dl_sb == sb) {
++			return dli;
++		}
++	}
++	return NULL;
++}
++
++
++struct dl_info *locate_dl_info(struct super_block *sb, tag_t tag)
++{
++	struct dl_info *dli;
++
++	rcu_read_lock();
++	dli = get_dl_info(__lookup_dl_info(sb, tag));
++	vxdprintk(VXD_CBIT(dlim, 7),
++		"locate_dl_info(%p,#%d) = %p", sb, tag, dli);
++	rcu_read_unlock();
++	return dli;
++}
++
++void rcu_free_dl_info(struct rcu_head *head)
++{
++	struct dl_info *dli = container_of(head, struct dl_info, dl_rcu);
++	int usecnt, refcnt;
++
++	BUG_ON(!dli || !head);
++
++	usecnt = atomic_read(&dli->dl_usecnt);
++	BUG_ON(usecnt < 0);
++
++	refcnt = atomic_read(&dli->dl_refcnt);
++	BUG_ON(refcnt < 0);
++
++	vxdprintk(VXD_CBIT(dlim, 3),
++		"rcu_free_dl_info(%p)", dli);
++	if (!usecnt)
++		__dealloc_dl_info(dli);
++	else
++		printk("!!! rcu didn't free\n");
++}
++
++
++
++
++static int do_addrem_dlimit(uint32_t id, const char __user *name,
++	uint32_t flags, int add)
++{
++	struct nameidata nd;
++	int ret;
++
++	ret = user_path_walk_link(name, &nd);
++	if (!ret) {
++		struct super_block *sb;
++		struct dl_info *dli;
++
++		ret = -EINVAL;
++		if (!nd.dentry->d_inode)
++			goto out_release;
++		if (!(sb = nd.dentry->d_inode->i_sb))
++			goto out_release;
++
++		if (add) {
++			dli = __alloc_dl_info(sb, id);
++			spin_lock(&dl_info_hash_lock);
++
++			ret = -EEXIST;
++			if (__lookup_dl_info(sb, id))
++				goto out_unlock;
++			__hash_dl_info(dli);
++			dli = NULL;
++		} else {
++			spin_lock(&dl_info_hash_lock);
++			dli = __lookup_dl_info(sb, id);
++
++			ret = -ESRCH;
++			if (!dli)
++				goto out_unlock;
++			__unhash_dl_info(dli);
++		}
++		ret = 0;
++	out_unlock:
++		spin_unlock(&dl_info_hash_lock);
++		if (add && dli)
++			__dealloc_dl_info(dli);
++	out_release:
++		path_release(&nd);
++	}
++	return ret;
++}
++
++int vc_add_dlimit(uint32_t id, void __user *data)
++{
++	struct vcmd_ctx_dlimit_base_v0 vc_data;
++
++	if (copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	return do_addrem_dlimit(id, vc_data.name, vc_data.flags, 1);
++}
++
++int vc_rem_dlimit(uint32_t id, void __user *data)
++{
++	struct vcmd_ctx_dlimit_base_v0 vc_data;
++
++	if (copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	return do_addrem_dlimit(id, vc_data.name, vc_data.flags, 0);
++}
++
++#ifdef	CONFIG_COMPAT
++
++int vc_add_dlimit_x32(uint32_t id, void __user *data)
++{
++	struct vcmd_ctx_dlimit_base_v0_x32 vc_data;
++
++	if (copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	return do_addrem_dlimit(id,
++		compat_ptr(vc_data.name_ptr), vc_data.flags, 1);
++}
++
++int vc_rem_dlimit_x32(uint32_t id, void __user *data)
++{
++	struct vcmd_ctx_dlimit_base_v0_x32 vc_data;
++
++	if (copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	return do_addrem_dlimit(id,
++		compat_ptr(vc_data.name_ptr), vc_data.flags, 0);
++}
++
++#endif	/* CONFIG_COMPAT */
++
++
++static inline
++int do_set_dlimit(uint32_t id, const char __user *name,
++	uint32_t space_used, uint32_t space_total,
++	uint32_t inodes_used, uint32_t inodes_total,
++	uint32_t reserved, uint32_t flags)
++{
++	struct nameidata nd;
++	int ret;
++
++	ret = user_path_walk_link(name, &nd);
++	if (!ret) {
++		struct super_block *sb;
++		struct dl_info *dli;
++
++		ret = -EINVAL;
++		if (!nd.dentry->d_inode)
++			goto out_release;
++		if (!(sb = nd.dentry->d_inode->i_sb))
++			goto out_release;
++		if ((reserved != CDLIM_KEEP &&
++			reserved > 100) ||
++			(inodes_used != CDLIM_KEEP &&
++			inodes_used > inodes_total) ||
++			(space_used != CDLIM_KEEP &&
++			space_used > space_total))
++			goto out_release;
++
++		ret = -ESRCH;
++		dli = locate_dl_info(sb, id);
++		if (!dli)
++			goto out_release;
++
++		spin_lock(&dli->dl_lock);
++
++		if (inodes_used != CDLIM_KEEP)
++			dli->dl_inodes_used = inodes_used;
++		if (inodes_total != CDLIM_KEEP)
++			dli->dl_inodes_total = inodes_total;
++		if (space_used != CDLIM_KEEP) {
++			dli->dl_space_used = space_used;
++			dli->dl_space_used <<= 10;
++		}
++		if (space_total == CDLIM_INFINITY)
++			dli->dl_space_total = DLIM_INFINITY;
++		else if (space_total != CDLIM_KEEP) {
++			dli->dl_space_total = space_total;
++			dli->dl_space_total <<= 10;
++		}
++		if (reserved != CDLIM_KEEP)
++			dli->dl_nrlmult = (1 << 10) * (100 - reserved) / 100;
++
++		spin_unlock(&dli->dl_lock);
++
++		put_dl_info(dli);
++		ret = 0;
++
++	out_release:
++		path_release(&nd);
++	}
++	return ret;
++}
++
++int vc_set_dlimit(uint32_t id, void __user *data)
++{
++	struct vcmd_ctx_dlimit_v0 vc_data;
++
++	if (copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	return do_set_dlimit(id, vc_data.name,
++		vc_data.space_used, vc_data.space_total,
++		vc_data.inodes_used, vc_data.inodes_total,
++		vc_data.reserved, vc_data.flags);
++}
++
++#ifdef	CONFIG_COMPAT
++
++int vc_set_dlimit_x32(uint32_t id, void __user *data)
++{
++	struct vcmd_ctx_dlimit_v0_x32 vc_data;
++
++	if (copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	return do_set_dlimit(id, compat_ptr(vc_data.name_ptr),
++		vc_data.space_used, vc_data.space_total,
++		vc_data.inodes_used, vc_data.inodes_total,
++		vc_data.reserved, vc_data.flags);
++}
++
++#endif	/* CONFIG_COMPAT */
++
++
++static inline
++int do_get_dlimit(uint32_t id, const char __user *name,
++	uint32_t *space_used, uint32_t *space_total,
++	uint32_t *inodes_used, uint32_t *inodes_total,
++	uint32_t *reserved, uint32_t *flags)
++{
++	struct nameidata nd;
++	int ret;
++
++	ret = user_path_walk_link(name, &nd);
++	if (!ret) {
++		struct super_block *sb;
++		struct dl_info *dli;
++
++		ret = -EINVAL;
++		if (!nd.dentry->d_inode)
++			goto out_release;
++		if (!(sb = nd.dentry->d_inode->i_sb))
++			goto out_release;
++
++		ret = -ESRCH;
++		dli = locate_dl_info(sb, id);
++		if (!dli)
++			goto out_release;
++
++		spin_lock(&dli->dl_lock);
++		*inodes_used = dli->dl_inodes_used;
++		*inodes_total = dli->dl_inodes_total;
++		*space_used = dli->dl_space_used >> 10;
++		if (dli->dl_space_total == DLIM_INFINITY)
++			*space_total = CDLIM_INFINITY;
++		else
++			*space_total = dli->dl_space_total >> 10;
++
++		*reserved = 100 - ((dli->dl_nrlmult * 100 + 512) >> 10);
++		spin_unlock(&dli->dl_lock);
++
++		put_dl_info(dli);
++		ret = -EFAULT;
++
++		ret = 0;
++	out_release:
++		path_release(&nd);
++	}
++	return ret;
++}
++
++
++int vc_get_dlimit(uint32_t id, void __user *data)
++{
++	struct vcmd_ctx_dlimit_v0 vc_data;
++	int ret;
++
++	if (copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	ret = do_get_dlimit(id, vc_data.name,
++		&vc_data.space_used, &vc_data.space_total,
++		&vc_data.inodes_used, &vc_data.inodes_total,
++		&vc_data.reserved, &vc_data.flags);
++	if (ret)
++		return ret;
++
++	if (copy_to_user(data, &vc_data, sizeof(vc_data)))
++		return -EFAULT;
++	return 0;
++}
++
++#ifdef	CONFIG_COMPAT
++
++int vc_get_dlimit_x32(uint32_t id, void __user *data)
++{
++	struct vcmd_ctx_dlimit_v0_x32 vc_data;
++	int ret;
++
++	if (copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	ret = do_get_dlimit(id, compat_ptr(vc_data.name_ptr),
++		&vc_data.space_used, &vc_data.space_total,
++		&vc_data.inodes_used, &vc_data.inodes_total,
++		&vc_data.reserved, &vc_data.flags);
++	if (ret)
++		return ret;
++
++	if (copy_to_user(data, &vc_data, sizeof(vc_data)))
++		return -EFAULT;
++	return 0;
++}
++
++#endif	/* CONFIG_COMPAT */
++
++
++void vx_vsi_statfs(struct super_block *sb, struct kstatfs *buf)
++{
++	struct dl_info *dli;
++	__u64 blimit, bfree, bavail;
++	__u32 ifree;
++
++	dli = locate_dl_info(sb, dx_current_tag());
++	if (!dli)
++		return;
++
++	spin_lock(&dli->dl_lock);
++	if (dli->dl_inodes_total == (unsigned long)DLIM_INFINITY)
++		goto no_ilim;
++
++	/* reduce max inodes available to limit */
++	if (buf->f_files > dli->dl_inodes_total)
++		buf->f_files = dli->dl_inodes_total;
++
++	ifree = dli->dl_inodes_total - dli->dl_inodes_used;
++	/* reduce free inodes to min */
++	if (ifree < buf->f_ffree)
++		buf->f_ffree = ifree;
++
++no_ilim:
++	if (dli->dl_space_total == DLIM_INFINITY)
++		goto no_blim;
++
++	blimit = dli->dl_space_total >> sb->s_blocksize_bits;
++
++	if (dli->dl_space_total < dli->dl_space_used)
++		bfree = 0;
++	else
++		bfree = (dli->dl_space_total - dli->dl_space_used)
++			>> sb->s_blocksize_bits;
++
++	bavail = ((dli->dl_space_total >> 10) * dli->dl_nrlmult);
++	if (bavail < dli->dl_space_used)
++		bavail = 0;
++	else
++		bavail = (bavail - dli->dl_space_used)
++			>> sb->s_blocksize_bits;
++
++	/* reduce max space available to limit */
++	if (buf->f_blocks > blimit)
++		buf->f_blocks = blimit;
++
++	/* reduce free space to min */
++	if (bfree < buf->f_bfree)
++		buf->f_bfree = bfree;
++
++	/* reduce avail space to min */
++	if (bavail < buf->f_bavail)
++		buf->f_bavail = bavail;
++
++no_blim:
++	spin_unlock(&dli->dl_lock);
++	put_dl_info(dli);
++
++	return;
++}
++
++#include <linux/module.h>
++
++EXPORT_SYMBOL_GPL(locate_dl_info);
++EXPORT_SYMBOL_GPL(rcu_free_dl_info);
++
+Index: linux-2.6.20/kernel/vserver/helper.c
+===================================================================
+--- /dev/null
++++ linux-2.6.20/kernel/vserver/helper.c
+@@ -0,0 +1,204 @@
++/*
++ *  linux/kernel/vserver/helper.c
++ *
++ *  Virtual Context Support
++ *
++ *  Copyright (C) 2004-2005  Herbert Pötzl
++ *
++ *  V0.01  basic helper
++ *
++ */
++
++#include <linux/errno.h>
++#include <linux/kmod.h>
++#include <linux/sched.h>
++#include <linux/reboot.h>
++#include <linux/vs_context.h>
++#include <linux/vs_network.h>
++#include <linux/vserver/signal.h>
++
++#include <asm/uaccess.h>
++#include <asm/unistd.h>
++
++
++char vshelper_path[255] = "/sbin/vshelper";
++
++
++static int do_vshelper(char *name, char *argv[], char *envp[], int sync)
++{
++	int ret;
++
++	if ((ret = call_usermodehelper(name, argv, envp, sync))) {
++		printk(	KERN_WARNING
++			"%s: (%s %s) returned %s with %d\n",
++			name, argv[1], argv[2],
++			sync?"sync":"async", ret);
++	}
++	vxdprintk(VXD_CBIT(switch, 4),
++		"%s: (%s %s) returned %s with %d",
++		name, argv[1], argv[2], sync?"sync":"async", ret);
++	return ret;
++}
++
++/*
++ *      vshelper path is set via /proc/sys
++ *      invoked by vserver sys_reboot(), with
++ *      the following arguments
++ *
++ *      argv [0] = vshelper_path;
++ *      argv [1] = action: "restart", "halt", "poweroff", ...
++ *      argv [2] = context identifier
++ *
++ *      envp [*] = type-specific parameters
++ */
++
++long vs_reboot_helper(struct vx_info *vxi, int cmd, void __user *arg)
++{
++	char id_buf[8], cmd_buf[16];
++	char uid_buf[16], pid_buf[16];
++	int ret;
++
++	char *argv[] = {vshelper_path, NULL, id_buf, 0};
++	char *envp[] = {"HOME=/", "TERM=linux",
++			"PATH=/sbin:/usr/sbin:/bin:/usr/bin",
++			uid_buf, pid_buf, cmd_buf, 0};
++
++	if (vx_info_state(vxi, VXS_HELPER))
++		return -EAGAIN;
++	vxi->vx_state |= VXS_HELPER;
++
++	snprintf(id_buf, sizeof(id_buf)-1, "%d", vxi->vx_id);
++
++	snprintf(cmd_buf, sizeof(cmd_buf)-1, "VS_CMD=%08x", cmd);
++	snprintf(uid_buf, sizeof(uid_buf)-1, "VS_UID=%d", current->uid);
++	snprintf(pid_buf, sizeof(pid_buf)-1, "VS_PID=%d", current->pid);
++
++	switch (cmd) {
++	case LINUX_REBOOT_CMD_RESTART:
++		argv[1] = "restart";
++		break;
++
++	case LINUX_REBOOT_CMD_HALT:
++		argv[1] = "halt";
++		break;
++
++	case LINUX_REBOOT_CMD_POWER_OFF:
++		argv[1] = "poweroff";
++		break;
++
++	case LINUX_REBOOT_CMD_SW_SUSPEND:
++		argv[1] = "swsusp";
++		break;
++
++	default:
++		vxi->vx_state &= ~VXS_HELPER;
++		return 0;
++	}
++
++	ret = do_vshelper(vshelper_path, argv, envp, 0);
++	vxi->vx_state &= ~VXS_HELPER;
++	__wakeup_vx_info(vxi);
++	return (ret) ? -EPERM : 0;
++}
++
++
++long vs_reboot(unsigned int cmd, void __user * arg)
++{
++	struct vx_info *vxi = current->vx_info;
++	long ret = 0;
++
++	vxdprintk(VXD_CBIT(misc, 5),
++		"vs_reboot(%p[#%d],%d)",
++		vxi, vxi?vxi->vx_id:0, cmd);
++
++	ret = vs_reboot_helper(vxi, cmd, arg);
++	if (ret)
++		return ret;
++
++	vxi->reboot_cmd = cmd;
++	if (vx_info_flags(vxi, VXF_REBOOT_KILL, 0)) {
++		switch (cmd) {
++		case LINUX_REBOOT_CMD_RESTART:
++		case LINUX_REBOOT_CMD_HALT:
++		case LINUX_REBOOT_CMD_POWER_OFF:
++			vx_info_kill(vxi, 0, SIGKILL);
++			vx_info_kill(vxi, 1, SIGKILL);
++		default:
++			break;
++		}
++	}
++	return 0;
++}
++
++
++/*
++ *      argv [0] = vshelper_path;
++ *      argv [1] = action: "startup", "shutdown"
++ *      argv [2] = context identifier
++ *
++ *      envp [*] = type-specific parameters
++ */
++
++long vs_state_change(struct vx_info *vxi, unsigned int cmd)
++{
++	char id_buf[8], cmd_buf[16];
++	char *argv[] = {vshelper_path, NULL, id_buf, 0};
++	char *envp[] = {"HOME=/", "TERM=linux",
++			"PATH=/sbin:/usr/sbin:/bin:/usr/bin", cmd_buf, 0};
++
++	if (!vx_info_flags(vxi, VXF_SC_HELPER, 0))
++		return 0;
++
++	snprintf(id_buf, sizeof(id_buf)-1, "%d", vxi->vx_id);
++	snprintf(cmd_buf, sizeof(cmd_buf)-1, "VS_CMD=%08x", cmd);
++
++	switch (cmd) {
++	case VSC_STARTUP:
++		argv[1] = "startup";
++		break;
++	case VSC_SHUTDOWN:
++		argv[1] = "shutdown";
++		break;
++	default:
++		return 0;
++	}
++
++	return do_vshelper(vshelper_path, argv, envp, 1);
++}
++
++
++/*
++ *      argv [0] = vshelper_path;
++ *      argv [1] = action: "netup", "netdown"
++ *      argv [2] = context identifier
++ *
++ *      envp [*] = type-specific parameters
++ */
++
++long vs_net_change(struct nx_info *nxi, unsigned int cmd)
++{
++	char id_buf[8], cmd_buf[16];
++	char *argv[] = {vshelper_path, NULL, id_buf, 0};
++	char *envp[] = {"HOME=/", "TERM=linux",
++			"PATH=/sbin:/usr/sbin:/bin:/usr/bin", cmd_buf, 0};
++
++	if (!nx_info_flags(nxi, NXF_SC_HELPER, 0))
++		return 0;
++
++	snprintf(id_buf, sizeof(id_buf)-1, "%d", nxi->nx_id);
++	snprintf(cmd_buf, sizeof(cmd_buf)-1, "VS_CMD=%08x", cmd);
++
++	switch (cmd) {
++	case VSC_NETUP:
++		argv[1] = "netup";
++		break;
++	case VSC_NETDOWN:
++		argv[1] = "netdown";
++		break;
++	default:
++		return 0;
++	}
++
++	return do_vshelper(vshelper_path, argv, envp, 1);
++}
++
+Index: linux-2.6.20/kernel/vserver/history.c
+===================================================================
+--- /dev/null
++++ linux-2.6.20/kernel/vserver/history.c
+@@ -0,0 +1,264 @@
++/*
++ *  kernel/vserver/history.c
++ *
++ *  Virtual Context History Backtrace
++ *
++ *  Copyright (C) 2004-2005  Herbert Pötzl
++ *
++ *  V0.01  basic structure
++ *  V0.02  hash/unhash and trace
++ *  V0.03  preemption fixes
++ *
++ */
++
++#include <linux/errno.h>
++#include <linux/module.h>
++#include <linux/types.h>
++#include <linux/ctype.h>
++
++#include <asm/uaccess.h>
++#include <asm/atomic.h>
++#include <asm/unistd.h>
++
++#include <linux/vserver/context.h>
++#include <linux/vserver/debug.h>
++#include <linux/vserver/debug_cmd.h>
++#include <linux/vserver/history.h>
++
++
++#ifdef	CONFIG_VSERVER_HISTORY
++#define VXH_SIZE	CONFIG_VSERVER_HISTORY_SIZE
++#else
++#define VXH_SIZE	64
++#endif
++
++struct _vx_history {
++	unsigned int counter;
++
++	struct _vx_hist_entry entry[VXH_SIZE+1];
++};
++
++
++DEFINE_PER_CPU(struct _vx_history, vx_history_buffer);
++
++unsigned volatile int vxh_active = 1;
++
++static atomic_t sequence = ATOMIC_INIT(0);
++
++
++/*	vxh_advance()
++
++	* requires disabled preemption				*/
++
++struct _vx_hist_entry *vxh_advance(void *loc)
++{
++	unsigned int cpu = smp_processor_id();
++	struct _vx_history *hist = &per_cpu(vx_history_buffer, cpu);
++	struct _vx_hist_entry *entry;
++	unsigned int index;
++
++	index = vxh_active ? (hist->counter++ % VXH_SIZE) : VXH_SIZE;
++	entry = &hist->entry[index];
++
++	entry->seq = atomic_inc_return(&sequence);
++	entry->loc = loc;
++	return entry;
++}
++
++EXPORT_SYMBOL_GPL(vxh_advance);
++
++
++#define VXH_LOC_FMTS	"(#%04x,*%d):%p"
++
++#define VXH_LOC_ARGS(e)	(e)->seq, cpu, (e)->loc
++
++
++#define VXH_VXI_FMTS	"%p[#%d,%d.%d]"
++
++#define VXH_VXI_ARGS(e)	(e)->vxi.ptr,			\
++			(e)->vxi.ptr?(e)->vxi.xid:0,	\
++			(e)->vxi.ptr?(e)->vxi.usecnt:0,	\
++			(e)->vxi.ptr?(e)->vxi.tasks:0
++
++void	vxh_dump_entry(struct _vx_hist_entry *e, unsigned cpu)
++{
++	switch (e->type) {
++	case VXH_THROW_OOPS:
++		printk( VXH_LOC_FMTS " oops \n", VXH_LOC_ARGS(e));
++		break;
++
++	case VXH_GET_VX_INFO:
++	case VXH_PUT_VX_INFO:
++		printk( VXH_LOC_FMTS " %s_vx_info " VXH_VXI_FMTS "\n",
++			VXH_LOC_ARGS(e),
++			(e->type==VXH_GET_VX_INFO)?"get":"put",
++			VXH_VXI_ARGS(e));
++		break;
++
++	case VXH_INIT_VX_INFO:
++	case VXH_SET_VX_INFO:
++	case VXH_CLR_VX_INFO:
++		printk( VXH_LOC_FMTS " %s_vx_info " VXH_VXI_FMTS " @%p\n",
++			VXH_LOC_ARGS(e),
++			(e->type==VXH_INIT_VX_INFO)?"init":
++			((e->type==VXH_SET_VX_INFO)?"set":"clr"),
++			VXH_VXI_ARGS(e), e->sc.data);
++		break;
++
++	case VXH_CLAIM_VX_INFO:
++	case VXH_RELEASE_VX_INFO:
++		printk( VXH_LOC_FMTS " %s_vx_info " VXH_VXI_FMTS " @%p\n",
++			VXH_LOC_ARGS(e),
++			(e->type==VXH_CLAIM_VX_INFO)?"claim":"release",
++			VXH_VXI_ARGS(e), e->sc.data);
++		break;
++
++	case VXH_ALLOC_VX_INFO:
++	case VXH_DEALLOC_VX_INFO:
++		printk( VXH_LOC_FMTS " %s_vx_info " VXH_VXI_FMTS "\n",
++			VXH_LOC_ARGS(e),
++			(e->type==VXH_ALLOC_VX_INFO)?"alloc":"dealloc",
++			VXH_VXI_ARGS(e));
++		break;
++
++	case VXH_HASH_VX_INFO:
++	case VXH_UNHASH_VX_INFO:
++		printk( VXH_LOC_FMTS " __%s_vx_info " VXH_VXI_FMTS "\n",
++			VXH_LOC_ARGS(e),
++			(e->type==VXH_HASH_VX_INFO)?"hash":"unhash",
++			VXH_VXI_ARGS(e));
++		break;
++
++	case VXH_LOC_VX_INFO:
++	case VXH_LOOKUP_VX_INFO:
++	case VXH_CREATE_VX_INFO:
++		printk( VXH_LOC_FMTS " __%s_vx_info [#%d] -> " VXH_VXI_FMTS "\n",
++			VXH_LOC_ARGS(e),
++			(e->type==VXH_CREATE_VX_INFO)?"create":
++			((e->type==VXH_LOC_VX_INFO)?"loc":"lookup"),
++			e->ll.arg, VXH_VXI_ARGS(e));
++		break;
++	}
++}
++
++static void __vxh_dump_history(void)
++{
++	unsigned int i, cpu;
++
++	printk("History:\tSEQ: %8x\tNR_CPUS: %d\n",
++		atomic_read(&sequence), NR_CPUS);
++
++	for (i=0; i < VXH_SIZE; i++) {
++		for_each_online_cpu(cpu) {
++			struct _vx_history *hist =
++				&per_cpu(vx_history_buffer, cpu);
++			unsigned int index = (hist->counter-i) % VXH_SIZE;
++			struct _vx_hist_entry *entry = &hist->entry[index];
++
++			vxh_dump_entry(entry, cpu);
++		}
++	}
++}
++
++void	vxh_dump_history(void)
++{
++	vxh_active = 0;
++#ifdef CONFIG_SMP
++	local_irq_enable();
++	smp_send_stop();
++	local_irq_disable();
++#endif
++	__vxh_dump_history();
++}
++
++
++/* vserver syscall commands below here */
++
++
++int vc_dump_history(uint32_t id)
++{
++	vxh_active = 0;
++	__vxh_dump_history();
++	vxh_active = 1;
++
++	return 0;
++}
++
++
++int do_read_history(struct __user _vx_hist_entry *data,
++	int cpu, uint32_t *index, uint32_t *count)
++{
++	int pos, ret = 0;
++	struct _vx_history *hist = &per_cpu(vx_history_buffer, cpu);
++	int end = hist->counter;
++	int start = end - VXH_SIZE + 2;
++	int idx = *index;
++
++	/* special case: get current pos */
++	if (!*count) {
++		*index = end;
++		return 0;
++	}
++
++	/* have we lost some data? */
++	if (idx < start)
++		idx = start;
++
++	for (pos = 0; (pos < *count) && (idx < end); pos++, idx++) {
++		struct _vx_hist_entry *entry =
++			&hist->entry[idx % VXH_SIZE];
++
++		/* send entry to userspace */
++		ret = copy_to_user (&data[pos], entry, sizeof(*entry));
++		if (ret)
++			break;
++	}
++	/* save new index and count */
++	*index = idx;
++	*count = pos;
++	return ret ? ret : (*index < end);
++}
++
++int vc_read_history(uint32_t id, void __user *data)
++{
++	struct vcmd_read_history_v0 vc_data;
++	int ret;
++
++	if (id >= NR_CPUS)
++		return -EINVAL;
++
++	if (copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	ret = do_read_history((struct __user _vx_hist_entry *)vc_data.data,
++		id, &vc_data.index, &vc_data.count);
++
++	if (copy_to_user (data, &vc_data, sizeof(vc_data)))
++		return -EFAULT;
++	return ret;
++}
++
++#ifdef	CONFIG_COMPAT
++
++int vc_read_history_x32(uint32_t id, void __user *data)
++{
++	struct vcmd_read_history_v0_x32 vc_data;
++	int ret;
++
++	if (id >= NR_CPUS)
++		return -EINVAL;
++
++	if (copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	ret = do_read_history((struct __user _vx_hist_entry *)
++		compat_ptr(vc_data.data_ptr),
++		id, &vc_data.index, &vc_data.count);
++
++	if (copy_to_user (data, &vc_data, sizeof(vc_data)))
++		return -EFAULT;
++	return ret;
++}
++
++#endif	/* CONFIG_COMPAT */
++
+Index: linux-2.6.20/kernel/vserver/inet.c
+===================================================================
+--- /dev/null
++++ linux-2.6.20/kernel/vserver/inet.c
+@@ -0,0 +1,56 @@
++
++#include <linux/sched.h>
++#include <linux/vs_inet.h>
++
++
++int nx_addr_conflict(struct nx_info *nxi, uint32_t addr, const struct sock *sk)
++{
++	vxdprintk(VXD_CBIT(net, 2),
++		"nx_addr_conflict(%p,%p) %d.%d,%d.%d",
++		nxi, sk, VXD_QUAD(addr));
++
++	if (addr) {
++		/* check real address */
++		return __addr_in_socket(sk, addr);
++	} else if (nxi) {
++		/* check against nx_info */
++		int i, n = nxi->nbipv4;
++
++		for (i=0; i<n; i++)
++			if (__addr_in_socket(sk, nxi->ipv4[i]))
++				return 1;
++		return 0;
++	} else {
++		/* check against any */
++		return 1;
++	}
++}
++
++
++int dev_in_nx_info(struct net_device *dev, struct nx_info *nxi)
++{
++	struct in_device *in_dev;
++	struct in_ifaddr **ifap;
++	struct in_ifaddr *ifa;
++	int ret = 0;
++
++	if (!nxi)
++		return 1;
++
++	in_dev = in_dev_get(dev);
++	if (!in_dev)
++		goto out;
++
++	for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL;
++		ifap = &ifa->ifa_next) {
++		if (addr_in_nx_info(nxi, ifa->ifa_local)) {
++			ret = 1;
++			break;
++		}
++	}
++	in_dev_put(in_dev);
++out:
++	return ret;
++}
++
++
+Index: linux-2.6.20/kernel/vserver/init.c
+===================================================================
+--- /dev/null
++++ linux-2.6.20/kernel/vserver/init.c
+@@ -0,0 +1,47 @@
++/*
++ *  linux/kernel/init.c
++ *
++ *  Virtual Server Init
++ *
++ *  Copyright (C) 2004-2005  Herbert Pötzl
++ *
++ *  V0.01  basic structure
++ *
++ */
++
++#include <linux/errno.h>
++#include <linux/init.h>
++#include <linux/module.h>
++
++int	vserver_register_sysctl(void);
++void	vserver_unregister_sysctl(void);
++
++
++static int __init init_vserver(void)
++{
++	int ret = 0;
++
++#ifdef	CONFIG_VSERVER_DEBUG
++	vserver_register_sysctl();
++#endif
++	return ret;
++}
++
++
++static void __exit exit_vserver(void)
++{
++
++#ifdef	CONFIG_VSERVER_DEBUG
++	vserver_unregister_sysctl();
++#endif
++	return;
++}
++
++/* FIXME: GFP_ZONETYPES gone
++long vx_slab[GFP_ZONETYPES]; */
++long vx_area;
++
++
++module_init(init_vserver);
++module_exit(exit_vserver);
++
+Index: linux-2.6.20/kernel/vserver/inode.c
+===================================================================
+--- /dev/null
++++ linux-2.6.20/kernel/vserver/inode.c
+@@ -0,0 +1,321 @@
++/*
++ *  linux/kernel/vserver/inode.c
++ *
++ *  Virtual Server: File System Support
++ *
++ *  Copyright (C) 2004-2005  Herbert Pötzl
++ *
++ *  V0.01  separated from vcontext V0.05
++ *
++ */
++
++#include <linux/sched.h>
++#include <linux/proc_fs.h>
++#include <linux/devpts_fs.h>
++#include <linux/namei.h>
++#include <linux/mount.h>
++#include <linux/parser.h>
++#include <linux/compat.h>
++#include <linux/vserver/inode.h>
++#include <linux/vserver/inode_cmd.h>
++#include <linux/vs_base.h>
++#include <linux/vs_tag.h>
++
++#include <asm/errno.h>
++#include <asm/uaccess.h>
++
++
++static int __vc_get_iattr(struct inode *in, uint32_t *tag, uint32_t *flags, uint32_t *mask)
++{
++	struct proc_dir_entry *entry;
++
++	if (!in || !in->i_sb)
++		return -ESRCH;
++
++	*flags = IATTR_TAG
++		| (IS_BARRIER(in) ? IATTR_BARRIER : 0)
++		| (IS_IUNLINK(in) ? IATTR_IUNLINK : 0)
++		| (IS_IMMUTABLE(in) ? IATTR_IMMUTABLE : 0);
++	*mask = IATTR_IUNLINK | IATTR_IMMUTABLE;
++
++	if (S_ISDIR(in->i_mode))
++		*mask |= IATTR_BARRIER;
++
++	if (IS_TAGGED(in)) {
++		*tag = in->i_tag;
++		*mask |= IATTR_TAG;
++	}
++
++	switch (in->i_sb->s_magic) {
++	case PROC_SUPER_MAGIC:
++		entry = PROC_I(in)->pde;
++
++		/* check for specific inodes? */
++		if (entry)
++			*mask |= IATTR_FLAGS;
++		if (entry)
++			*flags |= (entry->vx_flags & IATTR_FLAGS);
++		else
++			*flags |= (PROC_I(in)->vx_flags & IATTR_FLAGS);
++		break;
++
++	case DEVPTS_SUPER_MAGIC:
++		*tag = in->i_tag;
++		*mask |= IATTR_TAG;
++		break;
++
++	default:
++		break;
++	}
++	return 0;
++}
++
++int vc_get_iattr(uint32_t id, void __user *data)
++{
++	struct nameidata nd;
++	struct vcmd_ctx_iattr_v1 vc_data = { .xid = -1 };
++	int ret;
++
++	if (copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	ret = user_path_walk_link(vc_data.name, &nd);
++	if (!ret) {
++		ret = __vc_get_iattr(nd.dentry->d_inode,
++			&vc_data.xid, &vc_data.flags, &vc_data.mask);
++		path_release(&nd);
++	}
++	if (ret)
++		return ret;
++
++	if (copy_to_user (data, &vc_data, sizeof(vc_data)))
++		ret = -EFAULT;
++	return ret;
++}
++
++#ifdef	CONFIG_COMPAT
++
++int vc_get_iattr_x32(uint32_t id, void __user *data)
++{
++	struct nameidata nd;
++	struct vcmd_ctx_iattr_v1_x32 vc_data = { .xid = -1 };
++	int ret;
++
++	if (!vx_check(0, VS_ADMIN))
++		return -ENOSYS;
++	if (copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	ret = user_path_walk_link(compat_ptr(vc_data.name_ptr), &nd);
++	if (!ret) {
++		ret = __vc_get_iattr(nd.dentry->d_inode,
++			&vc_data.xid, &vc_data.flags, &vc_data.mask);
++		path_release(&nd);
++	}
++	if (ret)
++		return ret;
++
++	if (copy_to_user (data, &vc_data, sizeof(vc_data)))
++		ret = -EFAULT;
++	return ret;
++}
++
++#endif	/* CONFIG_COMPAT */
++
++
++static int __vc_set_iattr(struct dentry *de, uint32_t *tag, uint32_t *flags, uint32_t *mask)
++{
++	struct inode *in = de->d_inode;
++	int error = 0, is_proc = 0, has_tag = 0;
++	struct iattr attr = { 0 };
++
++	if (!in || !in->i_sb)
++		return -ESRCH;
++
++	is_proc = (in->i_sb->s_magic == PROC_SUPER_MAGIC);
++	if ((*mask & IATTR_FLAGS) && !is_proc)
++		return -EINVAL;
++
++	has_tag = IS_TAGGED(in) ||
++		(in->i_sb->s_magic == DEVPTS_SUPER_MAGIC);
++	if ((*mask & IATTR_TAG) && !has_tag)
++		return -EINVAL;
++
++	mutex_lock(&in->i_mutex);
++	if (*mask & IATTR_TAG) {
++		attr.ia_tag = *tag;
++		attr.ia_valid |= ATTR_TAG;
++	}
++
++	if (*mask & IATTR_FLAGS) {
++		struct proc_dir_entry *entry = PROC_I(in)->pde;
++		unsigned int iflags = PROC_I(in)->vx_flags;
++
++		iflags = (iflags & ~(*mask & IATTR_FLAGS))
++			| (*flags & IATTR_FLAGS);
++		PROC_I(in)->vx_flags = iflags;
++		if (entry)
++			entry->vx_flags = iflags;
++	}
++
++	if (*mask & (IATTR_BARRIER | IATTR_IUNLINK | IATTR_IMMUTABLE)) {
++		if (*mask & IATTR_IMMUTABLE) {
++			if (*flags & IATTR_IMMUTABLE)
++				in->i_flags |= S_IMMUTABLE;
++			else
++				in->i_flags &= ~S_IMMUTABLE;
++		}
++		if (*mask & IATTR_IUNLINK) {
++			if (*flags & IATTR_IUNLINK)
++				in->i_flags |= S_IUNLINK;
++			else
++				in->i_flags &= ~S_IUNLINK;
++		}
++		if (S_ISDIR(in->i_mode) && (*mask & IATTR_BARRIER)) {
++			if (*flags & IATTR_BARRIER)
++				in->i_flags |= S_BARRIER;
++			else
++				in->i_flags &= ~S_BARRIER;
++		}
++		if (in->i_op && in->i_op->sync_flags) {
++			error = in->i_op->sync_flags(in);
++			if (error)
++				goto out;
++		}
++	}
++
++	if (attr.ia_valid) {
++		if (in->i_op && in->i_op->setattr)
++			error = in->i_op->setattr(de, &attr);
++		else {
++			error = inode_change_ok(in, &attr);
++			if (!error)
++				error = inode_setattr(in, &attr);
++		}
++	}
++
++out:
++	mutex_unlock(&in->i_mutex);
++	return error;
++}
++
++int vc_set_iattr(uint32_t id, void __user *data)
++{
++	struct nameidata nd;
++	struct vcmd_ctx_iattr_v1 vc_data;
++	int ret;
++
++	if (!capable(CAP_LINUX_IMMUTABLE))
++		return -EPERM;
++	if (copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	ret = user_path_walk_link(vc_data.name, &nd);
++	if (!ret) {
++		ret = __vc_set_iattr(nd.dentry,
++			&vc_data.xid, &vc_data.flags, &vc_data.mask);
++		path_release(&nd);
++	}
++
++	if (copy_to_user (data, &vc_data, sizeof(vc_data)))
++		ret = -EFAULT;
++	return ret;
++}
++
++#ifdef	CONFIG_COMPAT
++
++int vc_set_iattr_x32(uint32_t id, void __user *data)
++{
++	struct nameidata nd;
++	struct vcmd_ctx_iattr_v1_x32 vc_data;
++	int ret;
++
++	if (!capable(CAP_LINUX_IMMUTABLE))
++		return -EPERM;
++	if (copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	ret = user_path_walk_link(compat_ptr(vc_data.name_ptr), &nd);
++	if (!ret) {
++		ret = __vc_set_iattr(nd.dentry,
++			&vc_data.xid, &vc_data.flags, &vc_data.mask);
++		path_release(&nd);
++	}
++
++	if (copy_to_user (data, &vc_data, sizeof(vc_data)))
++		ret = -EFAULT;
++	return ret;
++}
++
++#endif	/* CONFIG_COMPAT */
++
++
++#ifdef	CONFIG_PROPAGATE
++
++int dx_parse_tag(char *string, tag_t *tag, int remove)
++{
++	static match_table_t tokens = {
++		{1, "tagid=%u"},
++		{0, NULL}
++	};
++	substring_t args[MAX_OPT_ARGS];
++	int token, option = 0;
++
++	if (!string)
++		return 0;
++
++	token = match_token(string, tokens, args);
++	if (token && tag && !match_int(args, &option))
++		*tag = option;
++
++	vxdprintk(VXD_CBIT(tag, 7),
++		"dx_parse_tag(»%s«): %d:#%d",
++		string, token, option);
++
++	if ((token == 1) && remove) {
++		char *p = strstr(string, "tagid=");
++		char *q = p;
++
++		if (p) {
++			while (*q != '\0' && *q != ',')
++				q++;
++			while (*q)
++				*p++ = *q++;
++			while (*p)
++				*p++ = '\0';
++		}
++	}
++	return token;
++}
++
++void __dx_propagate_tag(struct nameidata *nd, struct inode *inode)
++{
++	tag_t new_tag = 0;
++	struct vfsmount *mnt;
++	int propagate;
++
++	if (!nd)
++		return;
++	mnt = nd->mnt;
++	if (!mnt)
++		return;
++
++	propagate = (mnt->mnt_flags & MNT_TAGID);
++	if (propagate)
++		new_tag = mnt->mnt_tag;
++
++	vxdprintk(VXD_CBIT(tag, 7),
++		"dx_propagate_tag(%p[#%lu.%d]): %d,%d",
++		inode, inode->i_ino, inode->i_tag,
++		new_tag, (propagate)?1:0);
++
++	if (propagate)
++		inode->i_tag = new_tag;
++}
++
++#include <linux/module.h>
++
++EXPORT_SYMBOL_GPL(__dx_propagate_tag);
++
++#endif	/* CONFIG_PROPAGATE */
++
+Index: linux-2.6.20/kernel/vserver/limit.c
+===================================================================
+--- /dev/null
++++ linux-2.6.20/kernel/vserver/limit.c
+@@ -0,0 +1,319 @@
++/*
++ *  linux/kernel/vserver/limit.c
++ *
++ *  Virtual Server: Context Limits
++ *
++ *  Copyright (C) 2004-2006  Herbert Pötzl
++ *
++ *  V0.01  broken out from vcontext V0.05
++ *  V0.02  changed vcmds to vxi arg
++ *
++ */
++
++#include <linux/module.h>
++#include <linux/vs_context.h>
++#include <linux/vs_limit.h>
++#include <linux/vserver/limit.h>
++#include <linux/vserver/switch.h>
++#include <linux/vserver/limit_cmd.h>
++
++#include <asm/errno.h>
++#include <asm/uaccess.h>
++
++
++const char *vlimit_name[NUM_LIMITS] = {
++	[RLIMIT_CPU]		= "CPU",
++	[RLIMIT_RSS]		= "RSS",
++	[RLIMIT_NPROC]		= "NPROC",
++	[RLIMIT_NOFILE]		= "NOFILE",
++	[RLIMIT_MEMLOCK]	= "VML",
++	[RLIMIT_AS]		= "VM",
++	[RLIMIT_LOCKS]		= "LOCKS",
++	[RLIMIT_SIGPENDING]	= "SIGP",
++	[RLIMIT_MSGQUEUE]	= "MSGQ",
++
++	[VLIMIT_NSOCK]		= "NSOCK",
++	[VLIMIT_OPENFD]		= "OPENFD",
++	[VLIMIT_ANON]		= "ANON",
++	[VLIMIT_SHMEM]		= "SHMEM",
++	[VLIMIT_DENTRY]		= "DENTRY",
++};
++
++EXPORT_SYMBOL_GPL(vlimit_name);
++
++#define MASK_ENTRY(x)	(1 << (x))
++
++const struct vcmd_ctx_rlimit_mask_v0 vlimit_mask = {
++		/* minimum */
++	0
++	,	/* softlimit */
++	MASK_ENTRY( RLIMIT_RSS		) |
++	MASK_ENTRY( VLIMIT_ANON		) |
++	0
++	,       /* maximum */
++	MASK_ENTRY( RLIMIT_RSS		) |
++	MASK_ENTRY( RLIMIT_NPROC	) |
++	MASK_ENTRY( RLIMIT_NOFILE	) |
++	MASK_ENTRY( RLIMIT_MEMLOCK	) |
++	MASK_ENTRY( RLIMIT_AS		) |
++	MASK_ENTRY( RLIMIT_LOCKS	) |
++	MASK_ENTRY( RLIMIT_MSGQUEUE	) |
++
++	MASK_ENTRY( VLIMIT_NSOCK	) |
++	MASK_ENTRY( VLIMIT_OPENFD	) |
++	MASK_ENTRY( VLIMIT_ANON		) |
++	MASK_ENTRY( VLIMIT_SHMEM	) |
++	MASK_ENTRY( VLIMIT_DENTRY	) |
++	0
++};
++		/* accounting only */
++uint32_t account_mask =
++	MASK_ENTRY( VLIMIT_SEMARY	) |
++	MASK_ENTRY( VLIMIT_NSEMS	) |
++	MASK_ENTRY( VLIMIT_MAPPED	) |
++	0;
++
++
++static int is_valid_vlimit(int id)
++{
++	uint32_t mask = vlimit_mask.minimum |
++		vlimit_mask.softlimit | vlimit_mask.maximum;
++	return mask & (1 << id);
++}
++
++static int is_accounted_vlimit(int id)
++{
++	if (is_valid_vlimit(id))
++		return 1;
++	return account_mask & (1 << id);
++}
++
++
++static inline uint64_t vc_get_soft(struct vx_info *vxi, int id)
++{
++	rlim_t limit = __rlim_soft(&vxi->limit, id);
++	return VX_VLIM(limit);
++}
++
++static inline uint64_t vc_get_hard(struct vx_info *vxi, int id)
++{
++	rlim_t limit = __rlim_hard(&vxi->limit, id);
++	return VX_VLIM(limit);
++}
++
++static int do_get_rlimit(struct vx_info *vxi, uint32_t id,
++	uint64_t *minimum, uint64_t *softlimit, uint64_t *maximum)
++{
++	if (!is_valid_vlimit(id))
++		return -EINVAL;
++
++	if (minimum)
++		*minimum = CRLIM_UNSET;
++	if (softlimit)
++		*softlimit = vc_get_soft(vxi, id);
++	if (maximum)
++		*maximum = vc_get_hard(vxi, id);
++	return 0;
++}
++
++int vc_get_rlimit(struct vx_info *vxi, void __user *data)
++{
++	struct vcmd_ctx_rlimit_v0 vc_data;
++	int ret;
++
++	if (copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	ret = do_get_rlimit(vxi, vc_data.id,
++		&vc_data.minimum, &vc_data.softlimit, &vc_data.maximum);
++	if (ret)
++		return ret;
++
++	if (copy_to_user (data, &vc_data, sizeof(vc_data)))
++		return -EFAULT;
++	return 0;
++}
++
++static int do_set_rlimit(struct vx_info *vxi, uint32_t id,
++	uint64_t minimum, uint64_t softlimit, uint64_t maximum)
++{
++	if (!is_valid_vlimit(id))
++		return -EINVAL;
++
++	if (maximum != CRLIM_KEEP)
++		__rlim_hard(&vxi->limit, id) = VX_RLIM(maximum);
++	if (softlimit != CRLIM_KEEP)
++		__rlim_soft(&vxi->limit, id) = VX_RLIM(softlimit);
++
++	/* clamp soft limit */
++	if (__rlim_soft(&vxi->limit, id) > __rlim_hard(&vxi->limit, id))
++		__rlim_soft(&vxi->limit, id) = __rlim_hard(&vxi->limit, id);
++
++	return 0;
++}
++
++int vc_set_rlimit(struct vx_info *vxi, void __user *data)
++{
++	struct vcmd_ctx_rlimit_v0 vc_data;
++
++	if (copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	return do_set_rlimit(vxi, vc_data.id,
++		vc_data.minimum, vc_data.softlimit, vc_data.maximum);
++}
++
++#ifdef	CONFIG_IA32_EMULATION
++
++int vc_set_rlimit_x32(struct vx_info *vxi, void __user *data)
++{
++	struct vcmd_ctx_rlimit_v0_x32 vc_data;
++
++	if (copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	return do_set_rlimit(vxi, vc_data.id,
++		vc_data.minimum, vc_data.softlimit, vc_data.maximum);
++}
++
++int vc_get_rlimit_x32(struct vx_info *vxi, void __user *data)
++{
++	struct vcmd_ctx_rlimit_v0_x32 vc_data;
++	int ret;
++
++	if (copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	ret = do_get_rlimit(vxi, vc_data.id,
++		&vc_data.minimum, &vc_data.softlimit, &vc_data.maximum);
++	if (ret)
++		return ret;
++
++	if (copy_to_user (data, &vc_data, sizeof(vc_data)))
++		return -EFAULT;
++	return 0;
++}
++
++#endif	/* CONFIG_IA32_EMULATION */
++
++
++int vc_get_rlimit_mask(uint32_t id, void __user *data)
++{
++	if (copy_to_user(data, &vlimit_mask, sizeof(vlimit_mask)))
++		return -EFAULT;
++	return 0;
++}
++
++
++static inline void vx_reset_minmax(struct _vx_limit *limit)
++{
++	rlim_t value;
++	int lim;
++
++	for (lim=0; lim<NUM_LIMITS; lim++) {
++		value = __rlim_get(limit, lim);
++		__rlim_rmax(limit, lim) = value;
++		__rlim_rmin(limit, lim) = value;
++	}
++}
++
++
++int vc_reset_minmax(struct vx_info *vxi, void __user *data)
++{
++	vx_reset_minmax(&vxi->limit);
++	return 0;
++}
++
++
++int vc_rlimit_stat(struct vx_info *vxi, void __user *data)
++{
++	struct vcmd_rlimit_stat_v0 vc_data;
++	struct _vx_limit *limit = &vxi->limit;
++	int id;
++
++	if (copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	id = vc_data.id;
++	if (!is_accounted_vlimit(id))
++		return -EINVAL;
++
++	vx_limit_fixup(limit, id);
++	vc_data.hits = atomic_read(&__rlim_lhit(limit, id));
++	vc_data.value = __rlim_get(limit, id);
++	vc_data.minimum = __rlim_rmin(limit, id);
++	vc_data.maximum = __rlim_rmax(limit, id);
++
++	if (copy_to_user (data, &vc_data, sizeof(vc_data)))
++		return -EFAULT;
++	return 0;
++}
++
++
++void vx_vsi_meminfo(struct sysinfo *val)
++{
++	struct vx_info *vxi = current->vx_info;
++	unsigned long totalram, freeram;
++	rlim_t v;
++
++	/* we blindly accept the max */
++	v = __rlim_soft(&vxi->limit, RLIMIT_RSS);
++	totalram = (v != RLIM_INFINITY) ? v : val->totalram;
++
++	/* total minus used equals free */
++	v = __vx_cres_array_fixup(&vxi->limit, VLA_RSS);
++	freeram = (v < totalram) ? totalram - v : 0;
++
++	val->totalram = totalram;
++	val->freeram = freeram;
++	val->bufferram = 0;
++	val->totalhigh = 0;
++	val->freehigh = 0;
++	return;
++}
++
++void vx_vsi_swapinfo(struct sysinfo *val)
++{
++	struct vx_info *vxi = current->vx_info;
++	unsigned long totalswap, freeswap;
++	rlim_t v, w;
++
++	v = __rlim_soft(&vxi->limit, RLIMIT_RSS);
++	if (v == RLIM_INFINITY) {
++		val->freeswap = val->totalswap;
++		return;
++	}
++
++	/* we blindly accept the max */
++	w = __rlim_hard(&vxi->limit, RLIMIT_RSS);
++	totalswap = (w != RLIM_INFINITY) ? (w - v) : val->totalswap;
++
++	/* currently 'used' swap */
++	w = __vx_cres_array_fixup(&vxi->limit, VLA_RSS);
++	w -= (w > v) ? v : w;
++
++	/* total minus used equals free */
++	freeswap = (w < totalswap) ? totalswap - w : 0;
++
++	val->totalswap = totalswap;
++	val->freeswap = freeswap;
++	return;
++}
++
++
++unsigned long vx_badness(struct task_struct *task, struct mm_struct *mm)
++{
++	struct vx_info *vxi = mm->mm_vx_info;
++	unsigned long points;
++	rlim_t v, w;
++
++	if (!vxi)
++		return 0;
++
++	v = __vx_cres_array_fixup(&vxi->limit, VLA_RSS);
++	w = __rlim_soft(&vxi->limit, RLIMIT_RSS);
++	points = (v > w) ? (v - w) : 0;
++
++	return points;
++}
++
+Index: linux-2.6.20/kernel/vserver/limit_init.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/kernel/vserver/limit_init.h
+@@ -0,0 +1,33 @@
++
++
++static inline void vx_info_init_limit(struct _vx_limit *limit)
++{
++	int lim;
++
++	for (lim=0; lim<NUM_LIMITS; lim++) {
++		__rlim_soft(limit, lim) = RLIM_INFINITY;
++		__rlim_hard(limit, lim) = RLIM_INFINITY;
++		__rlim_set(limit, lim, 0);
++		atomic_set(&__rlim_lhit(limit, lim), 0);
++		__rlim_rmin(limit, lim) = 0;
++		__rlim_rmax(limit, lim) = 0;
++	}
++}
++
++static inline void vx_info_exit_limit(struct _vx_limit *limit)
++{
++#ifdef	CONFIG_VSERVER_DEBUG
++	rlim_t value;
++	int lim;
++
++	for (lim=0; lim<NUM_LIMITS; lim++) {
++		if ((1 << lim) & VLIM_NOCHECK)
++			continue;
++		value = __rlim_get(limit, lim);
++		vxwprintk(value,
++			"!!! limit: %p[%s,%d] = %ld on exit.",
++			limit, vlimit_name[lim], lim, (long)value);
++	}
++#endif
++}
++
+Index: linux-2.6.20/kernel/vserver/limit_proc.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/kernel/vserver/limit_proc.h
+@@ -0,0 +1,58 @@
++#ifndef _VX_LIMIT_PROC_H
++#define _VX_LIMIT_PROC_H
++
++#include <linux/vserver/limit_int.h>
++
++
++#define VX_LIMIT_FMT	":\t%8ld\t%8ld/%8ld\t%8lld/%8lld\t%6d\n"
++#define VX_LIMIT_TOP	\
++	"Limit\t current\t     min/max\t\t    soft/hard\t\thits\n"
++
++#define VX_LIMIT_ARG(r)				\
++	,(unsigned long)__rlim_get(limit, r)	\
++	,(unsigned long)__rlim_rmin(limit, r)	\
++	,(unsigned long)__rlim_rmax(limit, r)	\
++	,VX_VLIM(__rlim_soft(limit, r))		\
++	,VX_VLIM(__rlim_hard(limit, r))		\
++	,atomic_read(&__rlim_lhit(limit, r))
++
++static inline int vx_info_proc_limit(struct _vx_limit *limit, char *buffer)
++{
++	vx_limit_fixup(limit, -1);
++	return sprintf(buffer, VX_LIMIT_TOP
++		"PROC"	VX_LIMIT_FMT
++		"VM"	VX_LIMIT_FMT
++		"VML"	VX_LIMIT_FMT
++		"RSS"	VX_LIMIT_FMT
++		"ANON"	VX_LIMIT_FMT
++		"RMAP"	VX_LIMIT_FMT
++		"FILES" VX_LIMIT_FMT
++		"OFD"	VX_LIMIT_FMT
++		"LOCKS" VX_LIMIT_FMT
++		"SOCK"	VX_LIMIT_FMT
++		"MSGQ"	VX_LIMIT_FMT
++		"SHM"	VX_LIMIT_FMT
++		"SEMA"	VX_LIMIT_FMT
++		"SEMS"	VX_LIMIT_FMT
++		"DENT"	VX_LIMIT_FMT
++		VX_LIMIT_ARG(RLIMIT_NPROC)
++		VX_LIMIT_ARG(RLIMIT_AS)
++		VX_LIMIT_ARG(RLIMIT_MEMLOCK)
++		VX_LIMIT_ARG(RLIMIT_RSS)
++		VX_LIMIT_ARG(VLIMIT_ANON)
++		VX_LIMIT_ARG(VLIMIT_MAPPED)
++		VX_LIMIT_ARG(RLIMIT_NOFILE)
++		VX_LIMIT_ARG(VLIMIT_OPENFD)
++		VX_LIMIT_ARG(RLIMIT_LOCKS)
++		VX_LIMIT_ARG(VLIMIT_NSOCK)
++		VX_LIMIT_ARG(RLIMIT_MSGQUEUE)
++		VX_LIMIT_ARG(VLIMIT_SHMEM)
++		VX_LIMIT_ARG(VLIMIT_SEMARY)
++		VX_LIMIT_ARG(VLIMIT_NSEMS)
++		VX_LIMIT_ARG(VLIMIT_DENTRY)
++		);
++}
++
++#endif	/* _VX_LIMIT_PROC_H */
++
++
+Index: linux-2.6.20/kernel/vserver/monitor.c
+===================================================================
+--- /dev/null
++++ linux-2.6.20/kernel/vserver/monitor.c
+@@ -0,0 +1,142 @@
++/*
++ *  kernel/vserver/monitor.c
++ *
++ *  Virtual Context Scheduler Monitor
++ *
++ *  Copyright (C) 2006 Herbert Pötzl
++ *
++ *  V0.01  basic design
++ *
++ */
++
++#include <linux/errno.h>
++#include <linux/module.h>
++#include <linux/types.h>
++#include <linux/ctype.h>
++
++#include <asm/uaccess.h>
++#include <asm/atomic.h>
++#include <asm/unistd.h>
++
++#include <linux/vserver/monitor.h>
++#include <linux/vserver/debug_cmd.h>
++
++
++#ifdef	CONFIG_VSERVER_MONITOR
++#define VXM_SIZE	CONFIG_VSERVER_MONITOR_SIZE
++#else
++#define VXM_SIZE	64
++#endif
++
++struct _vx_monitor {
++	unsigned int counter;
++
++	struct _vx_mon_entry entry[VXM_SIZE+1];
++};
++
++
++DEFINE_PER_CPU(struct _vx_monitor, vx_monitor_buffer);
++
++unsigned volatile int vxm_active = 1;
++
++static atomic_t sequence = ATOMIC_INIT(0);
++
++
++/*	vxm_advance()
++
++	* requires disabled preemption				*/
++
++struct _vx_mon_entry *vxm_advance(int cpu)
++{
++	struct _vx_monitor *mon = &per_cpu(vx_monitor_buffer, cpu);
++	struct _vx_mon_entry *entry;
++	unsigned int index;
++
++	index = vxm_active ? (mon->counter++ % VXM_SIZE) : VXM_SIZE;
++	entry = &mon->entry[index];
++
++	entry->ev.seq = atomic_inc_return(&sequence);
++	entry->ev.jif = jiffies;
++	return entry;
++}
++
++EXPORT_SYMBOL_GPL(vxm_advance);
++
++
++int do_read_monitor(struct __user _vx_mon_entry *data,
++	int cpu, uint32_t *index, uint32_t *count)
++{
++	int pos, ret = 0;
++	struct _vx_monitor *mon = &per_cpu(vx_monitor_buffer, cpu);
++	int end = mon->counter;
++	int start = end - VXM_SIZE + 2;
++	int idx = *index;
++
++	/* special case: get current pos */
++	if (!*count) {
++		*index = end;
++		return 0;
++	}
++
++	/* have we lost some data? */
++	if (idx < start)
++		idx = start;
++
++	for (pos = 0; (pos < *count) && (idx < end); pos++, idx++) {
++		struct _vx_mon_entry *entry =
++			&mon->entry[idx % VXM_SIZE];
++
++		/* send entry to userspace */
++		ret = copy_to_user (&data[pos], entry, sizeof(*entry));
++		if (ret)
++			break;
++	}
++	/* save new index and count */
++	*index = idx;
++	*count = pos;
++	return ret ? ret : (*index < end);
++}
++
++int vc_read_monitor(uint32_t id, void __user *data)
++{
++	struct vcmd_read_monitor_v0 vc_data;
++	int ret;
++
++	if (id >= NR_CPUS)
++		return -EINVAL;
++
++	if (copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	ret = do_read_monitor((struct __user _vx_mon_entry *)vc_data.data,
++		id, &vc_data.index, &vc_data.count);
++
++	if (copy_to_user (data, &vc_data, sizeof(vc_data)))
++		return -EFAULT;
++	return ret;
++}
++
++#ifdef	CONFIG_COMPAT
++
++int vc_read_monitor_x32(uint32_t id, void __user *data)
++{
++	struct vcmd_read_monitor_v0_x32 vc_data;
++	int ret;
++
++	if (id >= NR_CPUS)
++		return -EINVAL;
++
++	if (copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	ret = do_read_monitor((struct __user _vx_mon_entry *)
++		compat_ptr(vc_data.data_ptr),
++		id, &vc_data.index, &vc_data.count);
++
++	if (copy_to_user (data, &vc_data, sizeof(vc_data)))
++		return -EFAULT;
++	return ret;
++}
++
++#endif	/* CONFIG_COMPAT */
++
+Index: linux-2.6.20/kernel/vserver/network.c
+===================================================================
+--- /dev/null
++++ linux-2.6.20/kernel/vserver/network.c
+@@ -0,0 +1,633 @@
++/*
++ *  linux/kernel/vserver/network.c
++ *
++ *  Virtual Server: Network Support
++ *
++ *  Copyright (C) 2003-2006  Herbert Pötzl
++ *
++ *  V0.01  broken out from vcontext V0.05
++ *  V0.02  cleaned up implementation
++ *  V0.03  added equiv nx commands
++ *  V0.04  switch to RCU based hash
++ *  V0.05  and back to locking again
++ *  V0.06  changed vcmds to nxi arg
++ *
++ */
++
++#include <linux/slab.h>
++#include <linux/rcupdate.h>
++#include <net/tcp.h>
++
++#include <asm/errno.h>
++#include <linux/vserver/base.h>
++#include <linux/vserver/network_cmd.h>
++
++
++atomic_t nx_global_ctotal	= ATOMIC_INIT(0);
++atomic_t nx_global_cactive	= ATOMIC_INIT(0);
++
++
++/*	__alloc_nx_info()
++
++	* allocate an initialized nx_info struct
++	* doesn't make it visible (hash)			*/
++
++static struct nx_info *__alloc_nx_info(nid_t nid)
++{
++	struct nx_info *new = NULL;
++
++	vxdprintk(VXD_CBIT(nid, 1), "alloc_nx_info(%d)*", nid);
++
++	/* would this benefit from a slab cache? */
++	new = kmalloc(sizeof(struct nx_info), GFP_KERNEL);
++	if (!new)
++		return 0;
++
++	memset (new, 0, sizeof(struct nx_info));
++	new->nx_id = nid;
++	INIT_HLIST_NODE(&new->nx_hlist);
++	atomic_set(&new->nx_usecnt, 0);
++	atomic_set(&new->nx_tasks, 0);
++	new->nx_state = 0;
++
++	new->nx_flags = NXF_INIT_SET;
++
++	/* rest of init goes here */
++
++	vxdprintk(VXD_CBIT(nid, 0),
++		"alloc_nx_info(%d) = %p", nid, new);
++	atomic_inc(&nx_global_ctotal);
++	return new;
++}
++
++/*	__dealloc_nx_info()
++
++	* final disposal of nx_info				*/
++
++static void __dealloc_nx_info(struct nx_info *nxi)
++{
++	vxdprintk(VXD_CBIT(nid, 0),
++		"dealloc_nx_info(%p)", nxi);
++
++	nxi->nx_hlist.next = LIST_POISON1;
++	nxi->nx_id = -1;
++
++	BUG_ON(atomic_read(&nxi->nx_usecnt));
++	BUG_ON(atomic_read(&nxi->nx_tasks));
++
++	nxi->nx_state |= NXS_RELEASED;
++	kfree(nxi);
++	atomic_dec(&nx_global_ctotal);
++}
++
++static void __shutdown_nx_info(struct nx_info *nxi)
++{
++	nxi->nx_state |= NXS_SHUTDOWN;
++	vs_net_change(nxi, VSC_NETDOWN);
++}
++
++/*	exported stuff						*/
++
++void free_nx_info(struct nx_info *nxi)
++{
++	/* context shutdown is mandatory */
++	BUG_ON(nxi->nx_state != NXS_SHUTDOWN);
++
++	/* context must not be hashed */
++	BUG_ON(nxi->nx_state & NXS_HASHED);
++
++	BUG_ON(atomic_read(&nxi->nx_usecnt));
++	BUG_ON(atomic_read(&nxi->nx_tasks));
++
++	__dealloc_nx_info(nxi);
++}
++
++
++void __nx_set_lback(struct nx_info *nxi)
++{
++	int nid = nxi->nx_id;
++	uint32_t lback = htonl(INADDR_LOOPBACK ^ ((nid & 0xFFFF) << 8));
++
++	nxi->v4_lback = lback;
++}
++
++
++/*	hash table for nx_info hash */
++
++#define NX_HASH_SIZE	13
++
++struct hlist_head nx_info_hash[NX_HASH_SIZE];
++
++static spinlock_t nx_info_hash_lock = SPIN_LOCK_UNLOCKED;
++
++
++static inline unsigned int __hashval(nid_t nid)
++{
++	return (nid % NX_HASH_SIZE);
++}
++
++
++
++/*	__hash_nx_info()
++
++	* add the nxi to the global hash table
++	* requires the hash_lock to be held			*/
++
++static inline void __hash_nx_info(struct nx_info *nxi)
++{
++	struct hlist_head *head;
++
++	vxd_assert_lock(&nx_info_hash_lock);
++	vxdprintk(VXD_CBIT(nid, 4),
++		"__hash_nx_info: %p[#%d]", nxi, nxi->nx_id);
++
++	/* context must not be hashed */
++	BUG_ON(nx_info_state(nxi, NXS_HASHED));
++
++	nxi->nx_state |= NXS_HASHED;
++	head = &nx_info_hash[__hashval(nxi->nx_id)];
++	hlist_add_head(&nxi->nx_hlist, head);
++	atomic_inc(&nx_global_cactive);
++}
++
++/*	__unhash_nx_info()
++
++	* remove the nxi from the global hash table
++	* requires the hash_lock to be held			*/
++
++static inline void __unhash_nx_info(struct nx_info *nxi)
++{
++	vxd_assert_lock(&nx_info_hash_lock);
++	vxdprintk(VXD_CBIT(nid, 4),
++		"__unhash_nx_info: %p[#%d.%d.%d]", nxi, nxi->nx_id,
++		atomic_read(&nxi->nx_usecnt), atomic_read(&nxi->nx_tasks));
++
++	/* context must be hashed */
++	BUG_ON(!nx_info_state(nxi, NXS_HASHED));
++	/* but without tasks */
++	BUG_ON(atomic_read(&nxi->nx_tasks));
++
++	nxi->nx_state &= ~NXS_HASHED;
++	hlist_del(&nxi->nx_hlist);
++	atomic_dec(&nx_global_cactive);
++}
++
++
++/*	__lookup_nx_info()
++
++	* requires the hash_lock to be held
++	* doesn't increment the nx_refcnt			*/
++
++static inline struct nx_info *__lookup_nx_info(nid_t nid)
++{
++	struct hlist_head *head = &nx_info_hash[__hashval(nid)];
++	struct hlist_node *pos;
++	struct nx_info *nxi;
++
++	vxd_assert_lock(&nx_info_hash_lock);
++	hlist_for_each(pos, head) {
++		nxi = hlist_entry(pos, struct nx_info, nx_hlist);
++
++		if (nxi->nx_id == nid)
++			goto found;
++	}
++	nxi = NULL;
++found:
++	vxdprintk(VXD_CBIT(nid, 0),
++		"__lookup_nx_info(#%u): %p[#%u]",
++		nid, nxi, nxi?nxi->nx_id:0);
++	return nxi;
++}
++
++
++/*	__create_nx_info()
++
++	* create the requested context
++	* get() and hash it					*/
++
++static struct nx_info * __create_nx_info(int id)
++{
++	struct nx_info *new, *nxi = NULL;
++
++	vxdprintk(VXD_CBIT(nid, 1), "create_nx_info(%d)*", id);
++
++	if (!(new = __alloc_nx_info(id)))
++		return ERR_PTR(-ENOMEM);
++
++	/* required to make dynamic xids unique */
++	spin_lock(&nx_info_hash_lock);
++
++	/* static context requested */
++	if ((nxi = __lookup_nx_info(id))) {
++		vxdprintk(VXD_CBIT(nid, 0),
++			"create_nx_info(%d) = %p (already there)", id, nxi);
++		if (nx_info_flags(nxi, NXF_STATE_SETUP, 0))
++			nxi = ERR_PTR(-EBUSY);
++		else
++			nxi = ERR_PTR(-EEXIST);
++		goto out_unlock;
++	}
++	/* new context */
++	vxdprintk(VXD_CBIT(nid, 0),
++		"create_nx_info(%d) = %p (new)", id, new);
++	__hash_nx_info(get_nx_info(new));
++	nxi = new, new = NULL;
++
++out_unlock:
++	spin_unlock(&nx_info_hash_lock);
++	if (new)
++		__dealloc_nx_info(new);
++	return nxi;
++}
++
++
++
++/*	exported stuff						*/
++
++
++void unhash_nx_info(struct nx_info *nxi)
++{
++	__shutdown_nx_info(nxi);
++	spin_lock(&nx_info_hash_lock);
++	__unhash_nx_info(nxi);
++	spin_unlock(&nx_info_hash_lock);
++}
++
++
++/*	lookup_nx_info()
++
++	* search for a nx_info and get() it
++	* negative id means current				*/
++
++struct nx_info *lookup_nx_info(int id)
++{
++	struct nx_info *nxi = NULL;
++
++	if (id < 0) {
++		nxi = get_nx_info(current->nx_info);
++	} else if (id > 1) {
++		spin_lock(&nx_info_hash_lock);
++		nxi = get_nx_info(__lookup_nx_info(id));
++		spin_unlock(&nx_info_hash_lock);
++	}
++	return nxi;
++}
++
++/*	nid_is_hashed()
++
++	* verify that nid is still hashed			*/
++
++int nid_is_hashed(nid_t nid)
++{
++	int hashed;
++
++	spin_lock(&nx_info_hash_lock);
++	hashed = (__lookup_nx_info(nid) != NULL);
++	spin_unlock(&nx_info_hash_lock);
++	return hashed;
++}
++
++
++#ifdef	CONFIG_PROC_FS
++
++/*	get_nid_list()
++
++	* get a subset of hashed nids for proc
++	* assumes size is at least one				*/
++
++int get_nid_list(int index, unsigned int *nids, int size)
++{
++	int hindex, nr_nids = 0;
++
++	/* only show current and children */
++	if (!nx_check(0, VS_ADMIN|VS_WATCH)) {
++		if (index > 0)
++			return 0;
++		nids[nr_nids] = nx_current_nid();
++		return 1;
++	}
++
++	for (hindex = 0; hindex < NX_HASH_SIZE; hindex++) {
++		struct hlist_head *head = &nx_info_hash[hindex];
++		struct hlist_node *pos;
++
++		spin_lock(&nx_info_hash_lock);
++		hlist_for_each(pos, head) {
++			struct nx_info *nxi;
++
++			if (--index > 0)
++				continue;
++
++			nxi = hlist_entry(pos, struct nx_info, nx_hlist);
++			nids[nr_nids] = nxi->nx_id;
++			if (++nr_nids >= size) {
++				spin_unlock(&nx_info_hash_lock);
++				goto out;
++			}
++		}
++		/* keep the lock time short */
++		spin_unlock(&nx_info_hash_lock);
++	}
++out:
++	return nr_nids;
++}
++#endif
++
++
++/*
++ *	migrate task to new network
++ *	gets nxi, puts old_nxi on change
++ */
++
++int nx_migrate_task(struct task_struct *p, struct nx_info *nxi)
++{
++	struct nx_info *old_nxi;
++	int ret = 0;
++
++	if (!p || !nxi)
++		BUG();
++
++	vxdprintk(VXD_CBIT(nid, 5),
++		"nx_migrate_task(%p,%p[#%d.%d.%d])",
++		p, nxi, nxi->nx_id,
++		atomic_read(&nxi->nx_usecnt),
++		atomic_read(&nxi->nx_tasks));
++
++	if (nx_info_flags(nxi, NXF_INFO_PRIVATE, 0) &&
++		!nx_info_flags(nxi, NXF_STATE_SETUP, 0))
++		return -EACCES;
++
++	if (nx_info_state(nxi, NXS_SHUTDOWN))
++		return -EFAULT;
++
++	/* maybe disallow this completely? */
++	old_nxi = task_get_nx_info(p);
++	if (old_nxi == nxi)
++		goto out;
++
++	task_lock(p);
++	if (old_nxi)
++		clr_nx_info(&p->nx_info);
++	claim_nx_info(nxi, p);
++	set_nx_info(&p->nx_info, nxi);
++	p->nid = nxi->nx_id;
++	task_unlock(p);
++
++	vxdprintk(VXD_CBIT(nid, 5),
++		"moved task %p into nxi:%p[#%d]",
++		p, nxi, nxi->nx_id);
++
++	if (old_nxi)
++		release_nx_info(old_nxi, p);
++	ret = 0;
++out:
++	put_nx_info(old_nxi);
++	return ret;
++}
++
++
++void nx_set_persistent(struct nx_info *nxi)
++{
++	get_nx_info(nxi);
++	claim_nx_info(nxi, current);
++}
++
++void nx_clear_persistent(struct nx_info *nxi)
++{
++	vxdprintk(VXD_CBIT(nid, 6),
++		"nx_clear_persistent(%p[#%d])", nxi, nxi->nx_id);
++
++	release_nx_info(nxi, current);
++	put_nx_info(nxi);
++}
++
++void nx_update_persistent(struct nx_info *nxi)
++{
++	if (nx_info_flags(nxi, NXF_PERSISTENT, 0))
++		nx_set_persistent(nxi);
++	else
++		nx_clear_persistent(nxi);
++}
++
++/* vserver syscall commands below here */
++
++/* taks nid and nx_info functions */
++
++#include <asm/uaccess.h>
++
++
++int vc_task_nid(uint32_t id, void __user *data)
++{
++	nid_t nid;
++
++	if (id) {
++		struct task_struct *tsk;
++
++		if (!nx_check(0, VS_ADMIN|VS_WATCH))
++			return -EPERM;
++
++		read_lock(&tasklist_lock);
++		tsk = find_task_by_real_pid(id);
++		nid = (tsk) ? tsk->nid : -ESRCH;
++		read_unlock(&tasklist_lock);
++	}
++	else
++		nid = nx_current_nid();
++	return nid;
++}
++
++
++int vc_nx_info(struct nx_info *nxi, void __user *data)
++{
++	struct vcmd_nx_info_v0 vc_data;
++
++	vc_data.nid = nxi->nx_id;
++
++	if (copy_to_user (data, &vc_data, sizeof(vc_data)))
++		return -EFAULT;
++	return 0;
++}
++
++
++/* network functions */
++
++int vc_net_create(uint32_t nid, void __user *data)
++{
++	struct vcmd_net_create vc_data = { .flagword = NXF_INIT_SET };
++	struct nx_info *new_nxi;
++	int ret;
++
++	if (data && copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	if ((nid > MAX_S_CONTEXT) || (nid < 2))
++		return -EINVAL;
++
++	new_nxi = __create_nx_info(nid);
++	if (IS_ERR(new_nxi))
++		return PTR_ERR(new_nxi);
++
++	/* initial flags */
++	new_nxi->nx_flags = vc_data.flagword;
++
++	/* get a reference for persistent contexts */
++	if ((vc_data.flagword & NXF_PERSISTENT))
++		nx_set_persistent(new_nxi);
++
++	ret = -ENOEXEC;
++	if (vs_net_change(new_nxi, VSC_NETUP))
++		goto out_err;
++
++	ret = nx_migrate_task(current, new_nxi);
++	if (!ret) {
++		/* return context id on success */
++		ret = new_nxi->nx_id;
++		goto out;
++	}
++out_err:
++	/* prepare for context disposal */
++	new_nxi->nx_state |= NXS_SHUTDOWN;
++	new_nxi->nx_flags &= NXF_PERSISTENT;
++	if ((vc_data.flagword & NXF_PERSISTENT))
++		nx_clear_persistent(new_nxi);
++out:
++	put_nx_info(new_nxi);
++	return ret;
++}
++
++
++int vc_net_migrate(struct nx_info *nxi, void __user *data)
++{
++	return nx_migrate_task(current, nxi);
++}
++
++int vc_net_add(struct nx_info *nxi, void __user *data)
++{
++	struct vcmd_net_addr_v0 vc_data;
++	int index, pos, ret = 0;
++
++	if (data && copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	switch (vc_data.type) {
++	case NXA_TYPE_IPV4:
++		if ((vc_data.count < 1) || (vc_data.count > 4))
++			return -EINVAL;
++		break;
++
++	default:
++		break;
++	}
++
++	switch (vc_data.type) {
++	case NXA_TYPE_IPV4:
++		index = 0;
++		while ((index < vc_data.count) &&
++			((pos = nxi->nbipv4) < NB_IPV4ROOT)) {
++			nxi->ipv4[pos] = vc_data.ip[index].s_addr;
++			nxi->mask[pos] = vc_data.mask[index].s_addr;
++			index++;
++			nxi->nbipv4++;
++		}
++		ret = index;
++		break;
++
++	case NXA_TYPE_IPV4|NXA_MOD_BCAST:
++		nxi->v4_bcast = vc_data.ip[0].s_addr;
++		ret = 1;
++		break;
++
++	case NXA_TYPE_IPV4|NXA_MOD_LBACK:
++		nxi->v4_lback = vc_data.ip[0].s_addr;
++		ret = 1;
++		break;
++
++	default:
++		ret = -EINVAL;
++		break;
++	}
++	return ret;
++}
++
++int vc_net_remove(struct nx_info * nxi, void __user *data)
++{
++	struct vcmd_net_addr_v0 vc_data;
++
++	if (data && copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	switch (vc_data.type) {
++	case NXA_TYPE_ANY:
++		nxi->nbipv4 = 0;
++		break;
++
++	default:
++		return -EINVAL;
++	}
++	return 0;
++}
++
++int vc_get_nflags(struct nx_info *nxi, void __user *data)
++{
++	struct vcmd_net_flags_v0 vc_data;
++
++	vc_data.flagword = nxi->nx_flags;
++
++	/* special STATE flag handling */
++	vc_data.mask = vs_mask_flags(~0UL, nxi->nx_flags, NXF_ONE_TIME);
++
++	if (copy_to_user (data, &vc_data, sizeof(vc_data)))
++		return -EFAULT;
++	return 0;
++}
++
++int vc_set_nflags(struct nx_info *nxi, void __user *data)
++{
++	struct vcmd_net_flags_v0 vc_data;
++	uint64_t mask, trigger;
++
++	if (copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	/* special STATE flag handling */
++	mask = vs_mask_mask(vc_data.mask, nxi->nx_flags, NXF_ONE_TIME);
++	trigger = (mask & nxi->nx_flags) ^ (mask & vc_data.flagword);
++
++	nxi->nx_flags = vs_mask_flags(nxi->nx_flags,
++		vc_data.flagword, mask);
++	if (trigger & NXF_PERSISTENT)
++		nx_update_persistent(nxi);
++
++	return 0;
++}
++
++int vc_get_ncaps(struct nx_info *nxi, void __user *data)
++{
++	struct vcmd_net_caps_v0 vc_data;
++
++	vc_data.ncaps = nxi->nx_ncaps;
++	vc_data.cmask = ~0UL;
++
++	if (copy_to_user (data, &vc_data, sizeof(vc_data)))
++		return -EFAULT;
++	return 0;
++}
++
++int vc_set_ncaps(struct nx_info *nxi, void __user *data)
++{
++	struct vcmd_net_caps_v0 vc_data;
++
++	if (copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	nxi->nx_ncaps = vs_mask_flags(nxi->nx_ncaps,
++		vc_data.ncaps, vc_data.cmask);
++	return 0;
++}
++
++
++#include <linux/module.h>
++
++EXPORT_SYMBOL_GPL(free_nx_info);
++EXPORT_SYMBOL_GPL(unhash_nx_info);
++
+Index: linux-2.6.20/kernel/vserver/proc.c
+===================================================================
+--- /dev/null
++++ linux-2.6.20/kernel/vserver/proc.c
+@@ -0,0 +1,1044 @@
++/*
++ *  linux/kernel/vserver/proc.c
++ *
++ *  Virtual Context Support
++ *
++ *  Copyright (C) 2003-2006  Herbert Pötzl
++ *
++ *  V0.01  basic structure
++ *  V0.02  adaptation vs1.3.0
++ *  V0.03  proc permissions
++ *  V0.04  locking/generic
++ *  V0.05  next generation procfs
++ *  V0.06  inode validation
++ *  V0.07  generic rewrite vid
++ *  V0.08  remove inode type
++ *
++ */
++
++#include <linux/errno.h>
++#include <linux/proc_fs.h>
++#include <linux/sched.h>
++#include <linux/vs_context.h>
++#include <linux/vs_network.h>
++#include <linux/vs_cvirt.h>
++
++#include <linux/vserver/switch.h>
++#include <linux/vserver/global.h>
++
++#include <asm/uaccess.h>
++#include <asm/unistd.h>
++
++#include "cvirt_proc.h"
++#include "cacct_proc.h"
++#include "limit_proc.h"
++#include "sched_proc.h"
++#include "vci_config.h"
++
++static struct proc_dir_entry *proc_virtual;
++
++static struct proc_dir_entry *proc_virtnet;
++
++
++
++// #define PROC_VID_MASK	0x60
++
++
++/* first the actual feeds */
++
++
++static int proc_vci(char *buffer)
++{
++	return sprintf(buffer,
++		"VCIVersion:\t%04x:%04x\n"
++		"VCISyscall:\t%d\n"
++		"VCIKernel:\t%08x\n"
++		,VCI_VERSION >> 16
++		,VCI_VERSION & 0xFFFF
++		,__NR_vserver
++		,vci_kernel_config()
++		);
++}
++
++static int proc_virtual_info(char *buffer)
++{
++	return proc_vci(buffer);
++}
++
++static int proc_virtual_status(char *buffer)
++{
++	return sprintf(buffer,
++		"#CTotal:\t%d\n"
++		"#CActive:\t%d\n"
++		"#NSProxy:\t%d\t%d %d %d %d\n"
++		,atomic_read(&vx_global_ctotal)
++		,atomic_read(&vx_global_cactive)
++		,atomic_read(&vs_global_nsproxy)
++		,atomic_read(&vs_global_fs)
++		,atomic_read(&vs_global_mnt_ns)
++		,atomic_read(&vs_global_uts_ns)
++		,atomic_read(&vs_global_ipc_ns)
++		);
++}
++
++
++int proc_vxi_info (struct vx_info *vxi, char *buffer)
++{
++	int length;
++
++	length = sprintf(buffer,
++		"ID:\t%d\n"
++		"Info:\t%p\n"
++		"Init:\t%d\n"
++		,vxi->vx_id
++		,vxi
++		,vxi->vx_initpid
++		);
++	return length;
++}
++
++int proc_vxi_status (struct vx_info *vxi, char *buffer)
++{
++	int length;
++
++	length = sprintf(buffer,
++		"UseCnt:\t%d\n"
++		"Tasks:\t%d\n"
++		"Flags:\t%016llx\n"
++		"BCaps:\t%016llx\n"
++		"CCaps:\t%016llx\n"
++		"Spaces:\t%08lx\n"
++//		"Ticks:\t%d\n"
++		,atomic_read(&vxi->vx_usecnt)
++		,atomic_read(&vxi->vx_tasks)
++		,(unsigned long long)vxi->vx_flags
++		,(unsigned long long)vxi->vx_bcaps
++		,(unsigned long long)vxi->vx_ccaps
++		,vxi->vx_nsmask
++//		,atomic_read(&vxi->limit.ticks)
++		);
++	return length;
++}
++
++int proc_vxi_limit (struct vx_info *vxi, char *buffer)
++{
++	return vx_info_proc_limit(&vxi->limit, buffer);
++}
++
++int proc_vxi_sched (struct vx_info *vxi, char *buffer)
++{
++	int cpu, length;
++
++	length = vx_info_proc_sched(&vxi->sched, buffer);
++	for_each_online_cpu(cpu) {
++		length += vx_info_proc_sched_pc(
++			&vx_per_cpu(vxi, sched_pc, cpu),
++			buffer + length, cpu);
++	}
++	return length;
++}
++
++int proc_vxi_nsproxy (struct vx_info *vxi, char *buffer)
++{
++	return vx_info_proc_nsproxy(vxi->vx_nsproxy, buffer);
++}
++
++int proc_vxi_cvirt (struct vx_info *vxi, char *buffer)
++{
++	int cpu, length;
++
++	vx_update_load(vxi);
++	length = vx_info_proc_cvirt(&vxi->cvirt, buffer);
++	for_each_online_cpu(cpu) {
++		length += vx_info_proc_cvirt_pc(
++			&vx_per_cpu(vxi, cvirt_pc, cpu),
++			buffer + length, cpu);
++	}
++	return length;
++}
++
++int proc_vxi_cacct (struct vx_info *vxi, char *buffer)
++{
++	return vx_info_proc_cacct(&vxi->cacct, buffer);
++}
++
++
++static int proc_virtnet_info(char *buffer)
++{
++	return proc_vci(buffer);
++}
++
++static int proc_virtnet_status(char *buffer)
++{
++	return sprintf(buffer,
++		"#CTotal:\t%d\n"
++		"#CActive:\t%d\n"
++		,atomic_read(&nx_global_ctotal)
++		,atomic_read(&nx_global_cactive)
++		);
++}
++
++int proc_nxi_info (struct nx_info *nxi, char *buffer)
++{
++	int length, i;
++
++	length = sprintf(buffer,
++		"ID:\t%d\n"
++		"Info:\t%p\n"
++		,nxi->nx_id
++		,nxi
++		);
++	for (i=0; i<nxi->nbipv4; i++) {
++		length += sprintf(buffer + length,
++			"%d:\t" NIPQUAD_FMT "/" NIPQUAD_FMT "\n", i,
++			NIPQUAD(nxi->ipv4[i]), NIPQUAD(nxi->mask[i]));
++	}
++	return length;
++}
++
++int proc_nxi_status (struct nx_info *nxi, char *buffer)
++{
++	int length;
++
++	length = sprintf(buffer,
++		"UseCnt:\t%d\n"
++		"Tasks:\t%d\n"
++		"Flags:\t%016llx\n"
++		"NCaps:\t%016llx\n"
++		,atomic_read(&nxi->nx_usecnt)
++		,atomic_read(&nxi->nx_tasks)
++		,(unsigned long long)nxi->nx_flags
++		,(unsigned long long)nxi->nx_ncaps
++		);
++	return length;
++}
++
++
++
++/* here the inode helpers */
++
++struct vs_entry {
++	int len;
++	char *name;
++	mode_t mode;
++	struct inode_operations *iop;
++	struct file_operations *fop;
++	union proc_op op;
++};
++
++static struct inode *vs_proc_make_inode(struct super_block *sb, struct vs_entry *p)
++{
++	struct inode *inode = new_inode(sb);
++
++	if (!inode)
++		goto out;
++
++	inode->i_mode = p->mode;
++	if (p->iop)
++		inode->i_op = p->iop;
++	if (p->fop)
++		inode->i_fop = p->fop;
++
++	inode->i_nlink = (p->mode & S_IFDIR) ? 2 : 1;
++	inode->i_flags |= S_IMMUTABLE;
++
++	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
++
++	inode->i_uid = 0;
++	inode->i_gid = 0;
++	inode->i_tag = 0;
++out:
++	return inode;
++}
++
++static struct dentry *vs_proc_instantiate(struct inode *dir,
++	struct dentry *dentry, int id, void *ptr)
++{
++	struct vs_entry *p = ptr;
++	struct inode *inode = vs_proc_make_inode(dir->i_sb, p);
++	struct dentry *error = ERR_PTR(-EINVAL);
++
++	if (!inode)
++		goto out;
++
++	PROC_I(inode)->op = p->op;
++	PROC_I(inode)->fd = id;
++	d_add(dentry, inode);
++	error = NULL;
++out:
++	return error;
++}
++
++/* Lookups */
++
++typedef struct dentry *instantiate_t(struct inode *, struct dentry *, int, void *);
++
++/*
++ * Fill a directory entry.
++ *
++ * If possible create the dcache entry and derive our inode number and
++ * file type from dcache entry.
++ *
++ * Since all of the proc inode numbers are dynamically generated, the inode
++ * numbers do not exist until the inode is cache.  This means creating the
++ * the dcache entry in readdir is necessary to keep the inode numbers
++ * reported by readdir in sync with the inode numbers reported
++ * by stat.
++ */
++static int proc_fill_cache(struct file *filp, void *dirent, filldir_t filldir,
++	char *name, int len, instantiate_t instantiate, int id, void *ptr)
++{
++	struct dentry *child, *dir = filp->f_dentry;
++	struct inode *inode;
++	struct qstr qname;
++	ino_t ino = 0;
++	unsigned type = DT_UNKNOWN;
++
++	qname.name = name;
++	qname.len  = len;
++	qname.hash = full_name_hash(name, len);
++
++	child = d_lookup(dir, &qname);
++	if (!child) {
++		struct dentry *new;
++		new = d_alloc(dir, &qname);
++		if (new) {
++			child = instantiate(dir->d_inode, new, id, ptr);
++			if (child)
++				dput(new);
++			else
++				child = new;
++		}
++	}
++	if (!child || IS_ERR(child) || !child->d_inode)
++		goto end_instantiate;
++	inode = child->d_inode;
++	if (inode) {
++		ino = inode->i_ino;
++		type = inode->i_mode >> 12;
++	}
++	dput(child);
++end_instantiate:
++	if (!ino)
++		ino = find_inode_number(dir, &qname);
++	if (!ino)
++		ino = 1;
++	return filldir(dirent, name, len, filp->f_pos, ino, type);
++}
++
++
++
++/* get and revalidate vx_info/xid */
++
++static inline
++struct vx_info *get_proc_vx_info(struct inode *inode)
++{
++	return lookup_vx_info(PROC_I(inode)->fd);
++}
++
++static int proc_xid_revalidate(struct dentry * dentry, struct nameidata *nd)
++{
++	struct inode *inode = dentry->d_inode;
++	xid_t xid = PROC_I(inode)->fd;
++
++	if (!xid || xid_is_hashed(xid))
++		return 1;
++	d_drop(dentry);
++	return 0;
++}
++
++
++/* get and revalidate nx_info/nid */
++
++static int proc_nid_revalidate(struct dentry * dentry, struct nameidata *nd)
++{
++	struct inode *inode = dentry->d_inode;
++	nid_t nid = PROC_I(inode)->fd;
++
++	if (!nid || nid_is_hashed(nid))
++		return 1;
++	d_drop(dentry);
++	return 0;
++}
++
++
++
++#define PROC_BLOCK_SIZE (PAGE_SIZE - 1024)
++
++static ssize_t proc_vs_info_read(struct file * file, char __user * buf,
++			  size_t count, loff_t *ppos)
++{
++	struct inode *inode = file->f_dentry->d_inode;
++	unsigned long page;
++	ssize_t length = 0;
++
++	if (count > PROC_BLOCK_SIZE)
++		count = PROC_BLOCK_SIZE;
++
++	/* fade that out as soon as stable */
++	WARN_ON(PROC_I(inode)->fd);
++
++	if (!(page = __get_free_page(GFP_KERNEL)))
++		return -ENOMEM;
++
++	BUG_ON(!PROC_I(inode)->op.proc_vs_read);
++	length = PROC_I(inode)->op.proc_vs_read((char*)page);
++
++	if (length >= 0)
++		length = simple_read_from_buffer(buf, count, ppos,
++			(char *)page, length);
++
++	free_page(page);
++	return length;
++}
++
++static ssize_t proc_vx_info_read(struct file * file, char __user * buf,
++			  size_t count, loff_t *ppos)
++{
++	struct inode *inode = file->f_dentry->d_inode;
++	struct vx_info *vxi = NULL;
++	xid_t xid = PROC_I(inode)->fd;
++	unsigned long page;
++	ssize_t length = 0;
++
++	if (count > PROC_BLOCK_SIZE)
++		count = PROC_BLOCK_SIZE;
++
++	/* fade that out as soon as stable */
++	WARN_ON(!xid);
++	vxi = lookup_vx_info(xid);
++	if (!vxi)
++		goto out;
++
++	length = -ENOMEM;
++	if (!(page = __get_free_page(GFP_KERNEL)))
++		goto out_put;
++
++	BUG_ON(!PROC_I(inode)->op.proc_vxi_read);
++	length = PROC_I(inode)->op.proc_vxi_read(vxi, (char*)page);
++
++	if (length >= 0)
++		length = simple_read_from_buffer(buf, count, ppos,
++			(char *)page, length);
++
++	free_page(page);
++out_put:
++	put_vx_info(vxi);
++out:
++	return length;
++}
++
++static ssize_t proc_nx_info_read(struct file * file, char __user * buf,
++			  size_t count, loff_t *ppos)
++{
++	struct inode *inode = file->f_dentry->d_inode;
++	struct nx_info *nxi = NULL;
++	nid_t nid = PROC_I(inode)->fd;
++	unsigned long page;
++	ssize_t length = 0;
++
++	if (count > PROC_BLOCK_SIZE)
++		count = PROC_BLOCK_SIZE;
++
++	/* fade that out as soon as stable */
++	WARN_ON(!nid);
++	nxi = lookup_nx_info(nid);
++	if (!nxi)
++		goto out;
++
++	length = -ENOMEM;
++	if (!(page = __get_free_page(GFP_KERNEL)))
++		goto out_put;
++
++	BUG_ON(!PROC_I(inode)->op.proc_nxi_read);
++	length = PROC_I(inode)->op.proc_nxi_read(nxi, (char*)page);
++
++	if (length >= 0)
++		length = simple_read_from_buffer(buf, count, ppos,
++			(char *)page, length);
++
++	free_page(page);
++out_put:
++	put_nx_info(nxi);
++out:
++	return length;
++}
++
++
++
++/* here comes the lower level */
++
++
++#define NOD(NAME, MODE, IOP, FOP, OP) {	\
++	.len  = sizeof(NAME) - 1,	\
++	.name = (NAME),			\
++	.mode = MODE,			\
++	.iop  = IOP,			\
++	.fop  = FOP,			\
++	.op   = OP,			\
++}
++
++
++#define DIR(NAME, MODE, OTYPE)				\
++	NOD(NAME, (S_IFDIR|(MODE)),			\
++		&proc_##OTYPE##_inode_operations,	\
++		&proc_##OTYPE##_file_operations, { } )
++
++#define INF(NAME, MODE, OTYPE)				\
++	NOD(NAME, (S_IFREG|(MODE)), NULL,		\
++		&proc_vs_info_file_operations,		\
++		{ .proc_vs_read = &proc_##OTYPE } )
++
++#define VINF(NAME, MODE, OTYPE)				\
++	NOD(NAME, (S_IFREG|(MODE)), NULL,		\
++		&proc_vx_info_file_operations,		\
++		{ .proc_vxi_read = &proc_##OTYPE } )
++
++#define NINF(NAME, MODE, OTYPE)				\
++	NOD(NAME, (S_IFREG|(MODE)), NULL,		\
++		&proc_nx_info_file_operations,		\
++		{ .proc_nxi_read = &proc_##OTYPE } )
++
++
++static struct file_operations proc_vs_info_file_operations = {
++	.read =		proc_vs_info_read,
++};
++
++static struct file_operations proc_vx_info_file_operations = {
++	.read =		proc_vx_info_read,
++};
++
++static struct dentry_operations proc_xid_dentry_operations = {
++	.d_revalidate =	proc_xid_revalidate,
++};
++
++static struct vs_entry vx_base_stuff[] = {
++	VINF("info",	S_IRUGO, vxi_info),
++	VINF("status",	S_IRUGO, vxi_status),
++	VINF("limit",	S_IRUGO, vxi_limit),
++	VINF("sched",	S_IRUGO, vxi_sched),
++	VINF("nsproxy",	S_IRUGO, vxi_nsproxy),
++	VINF("cvirt",	S_IRUGO, vxi_cvirt),
++	VINF("cacct",	S_IRUGO, vxi_cacct),
++	{}
++};
++
++
++
++
++static struct dentry *proc_xid_instantiate(struct inode *dir,
++	struct dentry *dentry, int id, void *ptr)
++{
++	dentry->d_op = &proc_xid_dentry_operations;
++	return vs_proc_instantiate(dir, dentry, id, ptr);
++}
++
++static struct dentry *proc_xid_lookup(struct inode *dir,
++	struct dentry *dentry, struct nameidata *nd)
++{
++	struct vs_entry *p = vx_base_stuff;
++	struct dentry *error = ERR_PTR(-ENOENT);
++
++	for (; p->name; p++) {
++		if (p->len != dentry->d_name.len)
++			continue;
++		if (!memcmp(dentry->d_name.name, p->name, p->len))
++			break;
++	}
++	if (!p->name)
++		goto out;
++
++	error = proc_xid_instantiate(dir, dentry, PROC_I(dir)->fd, p);
++out:
++	return error;
++}
++
++static int proc_xid_readdir(struct file * filp,
++	void * dirent, filldir_t filldir)
++{
++	struct dentry *dentry = filp->f_dentry;
++	struct inode *inode = dentry->d_inode;
++	struct vs_entry *p = vx_base_stuff;
++	int size = sizeof(vx_base_stuff)/sizeof(struct vs_entry);
++	int pos, index;
++	u64 ino;
++
++	pos = filp->f_pos;
++	switch (pos) {
++	case 0:
++		ino = inode->i_ino;
++		if (filldir(dirent, ".", 1, pos, ino, DT_DIR) < 0)
++			goto out;
++		pos++;
++		/* fall through */
++	case 1:
++		ino = parent_ino(dentry);
++		if (filldir(dirent, "..", 2, pos, ino, DT_DIR) < 0)
++			goto out;
++		pos++;
++		/* fall through */
++	default:
++		index = pos - 2;
++		if (index >= size)
++			goto out;
++		for (p += index; p->name; p++) {
++			if (proc_fill_cache(filp, dirent, filldir, p->name, p->len,
++				vs_proc_instantiate, PROC_I(inode)->fd, p))
++				goto out;
++			pos++;
++		}
++	}
++out:
++	filp->f_pos = pos;
++	return 1;
++}
++
++
++
++static struct file_operations proc_nx_info_file_operations = {
++	.read =		proc_nx_info_read,
++};
++
++static struct dentry_operations proc_nid_dentry_operations = {
++	.d_revalidate =	proc_nid_revalidate,
++};
++
++static struct vs_entry nx_base_stuff[] = {
++	NINF("info",	S_IRUGO, nxi_info),
++	NINF("status",	S_IRUGO, nxi_status),
++	{}
++};
++
++
++static struct dentry *proc_nid_instantiate(struct inode *dir,
++	struct dentry *dentry, int id, void *ptr)
++{
++	dentry->d_op = &proc_nid_dentry_operations;
++	return vs_proc_instantiate(dir, dentry, id, ptr);
++}
++
++static struct dentry *proc_nid_lookup(struct inode *dir,
++	struct dentry *dentry, struct nameidata *nd)
++{
++	struct vs_entry *p = nx_base_stuff;
++	struct dentry *error = ERR_PTR(-ENOENT);
++
++	for (; p->name; p++) {
++		if (p->len != dentry->d_name.len)
++			continue;
++		if (!memcmp(dentry->d_name.name, p->name, p->len))
++			break;
++	}
++	if (!p->name)
++		goto out;
++
++	error = proc_nid_instantiate(dir, dentry, PROC_I(dir)->fd, p);
++out:
++	return error;
++}
++
++static int proc_nid_readdir(struct file * filp,
++	void * dirent, filldir_t filldir)
++{
++	struct dentry *dentry = filp->f_dentry;
++	struct inode *inode = dentry->d_inode;
++	struct vs_entry *p = nx_base_stuff;
++	int size = sizeof(nx_base_stuff)/sizeof(struct vs_entry);
++	int pos, index;
++	u64 ino;
++
++	pos = filp->f_pos;
++	switch (pos) {
++	case 0:
++		ino = inode->i_ino;
++		if (filldir(dirent, ".", 1, pos, ino, DT_DIR) < 0)
++			goto out;
++		pos++;
++		/* fall through */
++	case 1:
++		ino = parent_ino(dentry);
++		if (filldir(dirent, "..", 2, pos, ino, DT_DIR) < 0)
++			goto out;
++		pos++;
++		/* fall through */
++	default:
++		index = pos - 2;
++		if (index >= size)
++			goto out;
++		for (p += index; p->name; p++) {
++			if (proc_fill_cache(filp, dirent, filldir, p->name, p->len,
++				vs_proc_instantiate, PROC_I(inode)->fd, p))
++				goto out;
++			pos++;
++		}
++	}
++out:
++	filp->f_pos = pos;
++	return 1;
++}
++
++
++#define MAX_MULBY10	((~0U-9)/10)
++
++static inline int atovid(const char *str, int len)
++{
++	int vid, c;
++
++	vid = 0;
++	while (len-- > 0) {
++		c = *str - '0';
++		str++;
++		if (c > 9)
++			return -1;
++		if (vid >= MAX_MULBY10)
++			return -1;
++		vid *= 10;
++		vid += c;
++		if (!vid)
++			return -1;
++	}
++	return vid;
++}
++
++/* now the upper level (virtual) */
++
++
++static struct file_operations proc_xid_file_operations = {
++	.read =		generic_read_dir,
++	.readdir =	proc_xid_readdir,
++};
++
++static struct inode_operations proc_xid_inode_operations = {
++	.lookup =	proc_xid_lookup,
++};
++
++static struct vs_entry vx_virtual_stuff[] = {
++	INF("info",	S_IRUGO, virtual_info),
++	INF("status",	S_IRUGO, virtual_status),
++	DIR(NULL,	S_IRUGO|S_IXUGO, xid),
++};
++
++
++static struct dentry *proc_virtual_lookup(struct inode *dir,
++	struct dentry *dentry, struct nameidata *nd)
++{
++	struct vs_entry *p = vx_virtual_stuff;
++	struct dentry *error = ERR_PTR(-ENOENT);
++	int id = 0;
++
++	for (; p->name; p++) {
++		if (p->len != dentry->d_name.len)
++			continue;
++		if (!memcmp(dentry->d_name.name, p->name, p->len))
++			break;
++	}
++	if (p->name)
++		goto instantiate;
++
++	id = atovid(dentry->d_name.name, dentry->d_name.len);
++	if ((id < 0) || !xid_is_hashed(id))
++		goto out;
++
++instantiate:
++	error = proc_xid_instantiate(dir, dentry, id, p);
++out:
++	return error;
++}
++
++static struct file_operations proc_nid_file_operations = {
++	.read =		generic_read_dir,
++	.readdir =	proc_nid_readdir,
++};
++
++static struct inode_operations proc_nid_inode_operations = {
++	.lookup =	proc_nid_lookup,
++};
++
++static struct vs_entry nx_virtnet_stuff[] = {
++	INF("info",	S_IRUGO, virtnet_info),
++	INF("status",	S_IRUGO, virtnet_status),
++	DIR(NULL,	S_IRUGO|S_IXUGO, nid),
++};
++
++
++static struct dentry *proc_virtnet_lookup(struct inode *dir,
++	struct dentry *dentry, struct nameidata *nd)
++{
++	struct vs_entry *p = nx_virtnet_stuff;
++	struct dentry *error = ERR_PTR(-ENOENT);
++	int id = 0;
++
++	for (; p->name; p++) {
++		if (p->len != dentry->d_name.len)
++			continue;
++		if (!memcmp(dentry->d_name.name, p->name, p->len))
++			break;
++	}
++	if (p->name)
++		goto instantiate;
++
++	id = atovid(dentry->d_name.name, dentry->d_name.len);
++	if ((id < 0) || !nid_is_hashed(id))
++		goto out;
++
++instantiate:
++	error = proc_nid_instantiate(dir, dentry, id, p);
++out:
++	return error;
++}
++
++
++
++#define PROC_NUMBUF 10
++#define PROC_MAXVIDS 32
++
++int proc_virtual_readdir(struct file * filp,
++	void * dirent, filldir_t filldir)
++{
++	struct dentry *dentry = filp->f_dentry;
++	struct inode *inode = dentry->d_inode;
++	struct vs_entry *p = vx_virtual_stuff;
++	int size = sizeof(vx_virtual_stuff)/sizeof(struct vs_entry);
++	int pos, index;
++	unsigned int xid_array[PROC_MAXVIDS];
++	char buf[PROC_NUMBUF];
++	unsigned int nr_xids, i;
++	u64 ino;
++
++	pos = filp->f_pos;
++	switch (pos) {
++	case 0:
++		ino = inode->i_ino;
++		if (filldir(dirent, ".", 1, pos, ino, DT_DIR) < 0)
++			goto out;
++		pos++;
++		/* fall through */
++	case 1:
++		ino = parent_ino(dentry);
++		if (filldir(dirent, "..", 2, pos, ino, DT_DIR) < 0)
++			goto out;
++		pos++;
++		/* fall through */
++	default:
++		index = pos - 2;
++		if (index >= size)
++			goto entries;
++		for (p += index; p->name; p++) {
++			if (proc_fill_cache(filp, dirent, filldir, p->name, p->len,
++				vs_proc_instantiate, 0, p))
++				goto out;
++			pos++;
++		}
++	entries:
++		index = pos - size;
++		p = &vx_virtual_stuff[size-1];
++		nr_xids = get_xid_list(index, xid_array, PROC_MAXVIDS);
++		for (i = 0; i < nr_xids; i++) {
++			int n, xid = xid_array[i];
++			unsigned int j = PROC_NUMBUF;
++
++			n = xid;
++			do buf[--j] = '0' + (n % 10); while (n /= 10);
++
++			if (proc_fill_cache(filp, dirent, filldir, buf+j, PROC_NUMBUF-j,
++				vs_proc_instantiate, xid, p))
++				goto out;
++			pos++;
++		}
++	}
++out:
++	filp->f_pos = pos;
++	return 0;
++}
++
++static int proc_virtual_getattr(struct vfsmount *mnt,
++	struct dentry *dentry, struct kstat *stat)
++{
++	struct inode *inode = dentry->d_inode;
++
++	generic_fillattr(inode, stat);
++	stat->nlink = 2 + atomic_read(&vx_global_cactive);
++	return 0;
++}
++
++static struct file_operations proc_virtual_dir_operations = {
++	.read =		generic_read_dir,
++	.readdir =	proc_virtual_readdir,
++};
++
++static struct inode_operations proc_virtual_dir_inode_operations = {
++	.getattr =	proc_virtual_getattr,
++	.lookup =	proc_virtual_lookup,
++};
++
++
++
++
++
++int proc_virtnet_readdir(struct file * filp,
++	void * dirent, filldir_t filldir)
++{
++	struct dentry *dentry = filp->f_dentry;
++	struct inode *inode = dentry->d_inode;
++	struct vs_entry *p = nx_virtnet_stuff;
++	int size = sizeof(nx_virtnet_stuff)/sizeof(struct vs_entry);
++	int pos, index;
++	unsigned int nid_array[PROC_MAXVIDS];
++	char buf[PROC_NUMBUF];
++	unsigned int nr_nids, i;
++	u64 ino;
++
++	pos = filp->f_pos;
++	switch (pos) {
++	case 0:
++		ino = inode->i_ino;
++		if (filldir(dirent, ".", 1, pos, ino, DT_DIR) < 0)
++			goto out;
++		pos++;
++		/* fall through */
++	case 1:
++		ino = parent_ino(dentry);
++		if (filldir(dirent, "..", 2, pos, ino, DT_DIR) < 0)
++			goto out;
++		pos++;
++		/* fall through */
++	default:
++		index = pos - 2;
++		if (index >= size)
++			goto entries;
++		for (p += index; p->name; p++) {
++			if (proc_fill_cache(filp, dirent, filldir, p->name, p->len,
++				vs_proc_instantiate, 0, p))
++				goto out;
++			pos++;
++		}
++	entries:
++		index = pos - size;
++		p = &nx_virtnet_stuff[size-1];
++		nr_nids = get_nid_list(index, nid_array, PROC_MAXVIDS);
++		for (i = 0; i < nr_nids; i++) {
++			int n, nid = nid_array[i];
++			unsigned int j = PROC_NUMBUF;
++
++			n = nid;
++			do buf[--j] = '0' + (n % 10); while (n /= 10);
++
++			if (proc_fill_cache(filp, dirent, filldir, buf+j, PROC_NUMBUF-j,
++				vs_proc_instantiate, nid, p))
++				goto out;
++			pos++;
++		}
++	}
++out:
++	filp->f_pos = pos;
++	return 0;
++}
++
++static int proc_virtnet_getattr(struct vfsmount *mnt,
++	struct dentry *dentry, struct kstat *stat)
++{
++	struct inode *inode = dentry->d_inode;
++
++	generic_fillattr(inode, stat);
++	stat->nlink = 2 + atomic_read(&nx_global_cactive);
++	return 0;
++}
++
++static struct file_operations proc_virtnet_dir_operations = {
++	.read =		generic_read_dir,
++	.readdir =	proc_virtnet_readdir,
++};
++
++static struct inode_operations proc_virtnet_dir_inode_operations = {
++	.getattr = 	proc_virtnet_getattr,
++	.lookup =	proc_virtnet_lookup,
++};
++
++
++
++void proc_vx_init(void)
++{
++	struct proc_dir_entry *ent;
++
++	ent = proc_mkdir("virtual", 0);
++	if (ent) {
++		ent->proc_fops = &proc_virtual_dir_operations;
++		ent->proc_iops = &proc_virtual_dir_inode_operations;
++	}
++	proc_virtual = ent;
++
++	ent = proc_mkdir("virtnet", 0);
++	if (ent) {
++		ent->proc_fops = &proc_virtnet_dir_operations;
++		ent->proc_iops = &proc_virtnet_dir_inode_operations;
++	}
++	proc_virtnet = ent;
++}
++
++
++
++
++/* per pid info */
++
++
++int proc_pid_vx_info(struct task_struct *p, char *buffer)
++{
++	struct vx_info *vxi;
++	char * orig = buffer;
++
++	buffer += sprintf (buffer,"XID:\t%d\n", vx_task_xid(p));
++
++	vxi = task_get_vx_info(p);
++	if (!vxi)
++		goto out;
++
++	buffer += sprintf (buffer,"BCaps:\t%016llx\n"
++		,(unsigned long long)vxi->vx_bcaps);
++	buffer += sprintf (buffer,"CCaps:\t%016llx\n"
++		,(unsigned long long)vxi->vx_ccaps);
++	buffer += sprintf (buffer,"CFlags:\t%016llx\n"
++		,(unsigned long long)vxi->vx_flags);
++	buffer += sprintf (buffer,"CIPid:\t%d\n"
++		,vxi->vx_initpid);
++
++	put_vx_info(vxi);
++out:
++	return buffer - orig;
++}
++
++
++int proc_pid_nx_info(struct task_struct *p, char *buffer)
++{
++	struct nx_info *nxi;
++	char * orig = buffer;
++	int i;
++
++	buffer += sprintf (buffer,"NID:\t%d\n", nx_task_nid(p));
++
++	nxi = task_get_nx_info(p);
++	if (!nxi)
++		goto out;
++
++	buffer += sprintf (buffer,"NCaps:\t%016llx\n"
++		,(unsigned long long)nxi->nx_ncaps);
++	buffer += sprintf (buffer,"NFlags:\t%016llx\n"
++		,(unsigned long long)nxi->nx_flags);
++
++	for (i=0; i<nxi->nbipv4; i++){
++		buffer += sprintf (buffer,
++			"V4Root[%d]:\t%d.%d.%d.%d/%d.%d.%d.%d\n", i
++			,NIPQUAD(nxi->ipv4[i])
++			,NIPQUAD(nxi->mask[i]));
++	}
++	buffer += sprintf (buffer,
++		"V4Root[bcast]:\t%d.%d.%d.%d\n"
++		,NIPQUAD(nxi->v4_bcast));
++	buffer += sprintf (buffer,
++		"V4Root[lback]:\t%d.%d.%d.%d\n"
++		,NIPQUAD(nxi->v4_lback));
++
++	put_nx_info(nxi);
++out:
++	return buffer - orig;
++}
++
+Index: linux-2.6.20/kernel/vserver/sched.c
+===================================================================
+--- /dev/null
++++ linux-2.6.20/kernel/vserver/sched.c
+@@ -0,0 +1,423 @@
++/*
++ *  linux/kernel/vserver/sched.c
++ *
++ *  Virtual Server: Scheduler Support
++ *
++ *  Copyright (C) 2004-2006  Herbert Pötzl
++ *
++ *  V0.01  adapted Sam Vilains version to 2.6.3
++ *  V0.02  removed legacy interface
++ *  V0.03  changed vcmds to vxi arg
++ *
++ */
++
++#include <linux/sched.h>
++#include <linux/vs_context.h>
++#include <linux/vs_sched.h>
++#include <linux/vserver/sched_cmd.h>
++
++#include <asm/errno.h>
++#include <asm/uaccess.h>
++
++#define vxd_check_range(val, min, max) do {		\
++	vxlprintk((val<min) || (val>max),		\
++		"check_range(%ld,%ld,%ld)",		\
++		(long)val, (long)min, (long)max,	\
++		__FILE__, __LINE__);			\
++	} while (0)
++
++
++void vx_update_sched_param(struct _vx_sched *sched,
++	struct _vx_sched_pc *sched_pc)
++{
++	unsigned int set_mask = sched->update_mask;
++
++	if (set_mask & VXSM_FILL_RATE)
++		sched_pc->fill_rate[0] = sched->fill_rate[0];
++	if (set_mask & VXSM_INTERVAL)
++		sched_pc->interval[0] = sched->interval[0];
++	if (set_mask & VXSM_FILL_RATE2)
++		sched_pc->fill_rate[1] = sched->fill_rate[1];
++	if (set_mask & VXSM_INTERVAL2)
++		sched_pc->interval[1] = sched->interval[1];
++	if (set_mask & VXSM_TOKENS)
++		sched_pc->tokens = sched->tokens;
++	if (set_mask & VXSM_TOKENS_MIN)
++		sched_pc->tokens_min = sched->tokens_min;
++	if (set_mask & VXSM_TOKENS_MAX)
++		sched_pc->tokens_max = sched->tokens_max;
++	if (set_mask & VXSM_PRIO_BIAS)
++		sched_pc->prio_bias = sched->prio_bias;
++
++	if (set_mask & VXSM_IDLE_TIME)
++		sched_pc->flags |= VXSF_IDLE_TIME;
++	else
++		sched_pc->flags &= ~VXSF_IDLE_TIME;
++
++	/* reset time */
++	sched_pc->norm_time = jiffies;
++}
++
++
++/*
++ * recalculate the context's scheduling tokens
++ *
++ * ret > 0 : number of tokens available
++ * ret < 0 : on hold, check delta_min[]
++ *	     -1 only jiffies
++ *	     -2 also idle time
++ *
++ */
++int vx_tokens_recalc(struct _vx_sched_pc *sched_pc,
++	unsigned long *norm_time, unsigned long *idle_time, int delta_min[2])
++{
++	long delta;
++	long tokens = 0;
++	int flags = sched_pc->flags;
++
++	/* how much time did pass? */
++	delta = *norm_time - sched_pc->norm_time;
++	vxd_check_range(delta, 0, INT_MAX);
++
++	if (delta >= sched_pc->interval[0]) {
++		long tokens, integral;
++
++		/* calc integral token part */
++		tokens = delta / sched_pc->interval[0];
++		integral = tokens * sched_pc->interval[0];
++		tokens *= sched_pc->fill_rate[0];
++#ifdef	CONFIG_VSERVER_HARDCPU
++		delta_min[0] = delta - integral;
++		vxd_check_range(delta_min[0], 0, sched_pc->interval[0]);
++#endif
++		/* advance time */
++		sched_pc->norm_time += delta;
++
++		/* add tokens */
++		sched_pc->tokens += tokens;
++		sched_pc->token_time += tokens;
++	}
++	else
++		delta_min[0] = delta;
++
++#ifdef	CONFIG_VSERVER_IDLETIME
++	if (!(flags & VXSF_IDLE_TIME))
++		goto skip_idle;
++
++	/* how much was the idle skip? */
++	delta = *idle_time - sched_pc->idle_time;
++	vxd_check_range(delta, 0, INT_MAX);
++
++	if (delta >= sched_pc->interval[1]) {
++		long tokens, integral;
++
++		/* calc fair share token part */
++		tokens = delta / sched_pc->interval[1];
++		integral = tokens * sched_pc->interval[1];
++		tokens *= sched_pc->fill_rate[1];
++		delta_min[1] = delta - integral;
++		vxd_check_range(delta_min[1], 0, sched_pc->interval[1]);
++
++		/* advance idle time */
++		sched_pc->idle_time += integral;
++
++		/* add tokens */
++		sched_pc->tokens += tokens;
++		sched_pc->token_time += tokens;
++	}
++	else
++		delta_min[1] = delta;
++skip_idle:
++#endif
++
++	/* clip at maximum */
++	if (sched_pc->tokens > sched_pc->tokens_max)
++		sched_pc->tokens = sched_pc->tokens_max;
++	tokens = sched_pc->tokens;
++
++	if ((flags & VXSF_ONHOLD)) {
++		/* can we unhold? */
++		if (tokens >= sched_pc->tokens_min) {
++			flags &= ~VXSF_ONHOLD;
++			sched_pc->hold_ticks +=
++				*norm_time - sched_pc->onhold;
++		}
++		else
++			goto on_hold;
++	} else {
++		/* put on hold? */
++		if (tokens <= 0) {
++			flags |= VXSF_ONHOLD;
++			sched_pc->onhold = *norm_time;
++			goto on_hold;
++		}
++	}
++	sched_pc->flags = flags;
++	return tokens;
++
++on_hold:
++	tokens = sched_pc->tokens_min - tokens;
++	sched_pc->flags = flags;
++	BUG_ON(tokens < 0);
++
++#ifdef	CONFIG_VSERVER_HARDCPU
++	/* next interval? */
++	if (!sched_pc->fill_rate[0])
++		delta_min[0] = HZ;
++	else if (tokens > sched_pc->fill_rate[0])
++		delta_min[0] += sched_pc->interval[0] *
++			tokens / sched_pc->fill_rate[0];
++	else
++		delta_min[0] = sched_pc->interval[0] - delta_min[0];
++	vxd_check_range(delta_min[0], 0, INT_MAX);
++
++#ifdef	CONFIG_VSERVER_IDLETIME
++	if (!(flags & VXSF_IDLE_TIME))
++		return -1;
++
++	/* next interval? */
++	if (!sched_pc->fill_rate[1])
++		delta_min[1] = HZ;
++	else if (tokens > sched_pc->fill_rate[1])
++		delta_min[1] += sched_pc->interval[1] *
++			tokens / sched_pc->fill_rate[1];
++	else
++		delta_min[1] = sched_pc->interval[1] - delta_min[1];
++	vxd_check_range(delta_min[1], 0, INT_MAX);
++
++	return -2;
++#else
++	return -1;
++#endif /* CONFIG_VSERVER_IDLETIME */
++#else
++	return 0;
++#endif /* CONFIG_VSERVER_HARDCPU */
++}
++
++static inline unsigned long msec_to_ticks(unsigned long msec)
++{
++	return msecs_to_jiffies(msec);
++}
++
++static inline unsigned long ticks_to_msec(unsigned long ticks)
++{
++	return jiffies_to_msecs(ticks);
++}
++
++static inline unsigned long ticks_to_usec(unsigned long ticks)
++{
++	return jiffies_to_usecs(ticks);
++}
++
++
++static int do_set_sched(struct vx_info *vxi, struct vcmd_sched_v5 *data)
++{
++	unsigned int set_mask = data->mask;
++	unsigned int update_mask;
++	int i, cpu;
++
++	/* Sanity check data values */
++	if (data->tokens_max <= 0)
++		data->tokens_max = HZ;
++	if (data->tokens_min < 0)
++		data->tokens_min = HZ/3;
++	if (data->tokens_min >= data->tokens_max)
++		data->tokens_min = data->tokens_max;
++
++	if (data->prio_bias > MAX_PRIO_BIAS)
++		data->prio_bias = MAX_PRIO_BIAS;
++	if (data->prio_bias < MIN_PRIO_BIAS)
++		data->prio_bias = MIN_PRIO_BIAS;
++
++	spin_lock(&vxi->sched.tokens_lock);
++
++	/* sync up on delayed updates */
++	for_each_cpu_mask(cpu, vxi->sched.update)
++		vx_update_sched_param(&vxi->sched,
++			&vx_per_cpu(vxi, sched_pc, cpu));
++
++	if (set_mask & VXSM_FILL_RATE)
++		vxi->sched.fill_rate[0] = data->fill_rate[0];
++	if (set_mask & VXSM_FILL_RATE2)
++		vxi->sched.fill_rate[1] = data->fill_rate[1];
++	if (set_mask & VXSM_INTERVAL)
++		vxi->sched.interval[0] = (set_mask & VXSM_MSEC) ?
++			msec_to_ticks(data->interval[0]) : data->interval[0];
++	if (set_mask & VXSM_INTERVAL2)
++		vxi->sched.interval[1] = (set_mask & VXSM_MSEC) ?
++			msec_to_ticks(data->interval[1]) : data->interval[1];
++	if (set_mask & VXSM_TOKENS)
++		vxi->sched.tokens = data->tokens;
++	if (set_mask & VXSM_TOKENS_MIN)
++		vxi->sched.tokens_min = data->tokens_min;
++	if (set_mask & VXSM_TOKENS_MAX)
++		vxi->sched.tokens_max = data->tokens_max;
++	if (set_mask & VXSM_PRIO_BIAS)
++		vxi->sched.prio_bias = data->prio_bias;
++
++	/* Sanity check rate/interval */
++	for (i=0; i<2; i++) {
++		if (data->fill_rate[i] < 0)
++			data->fill_rate[i] = 0;
++		if (data->interval[i] <= 0)
++			data->interval[i] = HZ;
++	}
++
++	update_mask = vxi->sched.update_mask & VXSM_SET_MASK;
++	update_mask |= (set_mask & (VXSM_SET_MASK|VXSM_IDLE_TIME));
++	vxi->sched.update_mask = update_mask;
++#ifdef	CONFIG_SMP
++	rmb();
++	if (set_mask & VXSM_CPU_ID) {
++		vxi->sched.update = cpumask_of_cpu(data->cpu_id);
++		cpus_and(vxi->sched.update, cpu_online_map,
++			vxi->sched.update);
++	}
++	else
++		vxi->sched.update = cpu_online_map;
++
++	/* forced reload? */
++	if (set_mask & VXSM_FORCE) {
++		for_each_cpu_mask(cpu, vxi->sched.update)
++			vx_update_sched_param(&vxi->sched,
++				&vx_per_cpu(vxi, sched_pc, cpu));
++		vxi->sched.update = CPU_MASK_NONE;
++	}
++#else
++	/* on UP we update immediately */
++	vx_update_sched_param(&vxi->sched,
++		&vx_per_cpu(vxi, sched_pc, 0));
++#endif
++
++	spin_unlock(&vxi->sched.tokens_lock);
++	return 0;
++}
++
++#define	COPY_IDS(C) C(cpu_id); C(bucket_id)
++#define	COPY_PRI(C) C(prio_bias)
++#define	COPY_TOK(C) C(tokens); C(tokens_min); C(tokens_max)
++#define	COPY_FRI(C) C(fill_rate[0]); C(interval[0]);	\
++		    C(fill_rate[1]); C(interval[1]);
++
++#define	COPY_VALUE(name) vc_data.name = data->name
++
++static int do_set_sched_v4(struct vx_info *vxi, struct vcmd_set_sched_v4 *data)
++{
++	struct vcmd_sched_v5 vc_data;
++
++	vc_data.mask = data->set_mask;
++	COPY_IDS(COPY_VALUE);
++	COPY_PRI(COPY_VALUE);
++	COPY_TOK(COPY_VALUE);
++	vc_data.fill_rate[0] = vc_data.fill_rate[1] = data->fill_rate;
++	vc_data.interval[0] = vc_data.interval[1] = data->interval;
++	return do_set_sched(vxi, &vc_data);
++}
++
++int vc_set_sched_v3(struct vx_info *vxi, void __user *data)
++{
++	struct vcmd_set_sched_v3 vc_data;
++	struct vcmd_set_sched_v4 vc_data_v4;
++
++	if (copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	/* structures are binary compatible */
++	memcpy(&vc_data_v4, &vc_data, sizeof(vc_data));
++	vc_data_v4.set_mask &= VXSM_V3_MASK;
++	vc_data_v4.bucket_id = 0;
++
++	return do_set_sched_v4(vxi, &vc_data_v4);
++}
++
++int vc_set_sched_v4(struct vx_info *vxi, void __user *data)
++{
++	struct vcmd_set_sched_v4 vc_data;
++
++	if (copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	return do_set_sched_v4(vxi, &vc_data);
++}
++
++	/* latest interface is v5 */
++
++int vc_set_sched(struct vx_info *vxi, void __user *data)
++{
++	struct vcmd_sched_v5 vc_data;
++
++	if (copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	return do_set_sched(vxi, &vc_data);
++}
++
++
++int vc_get_sched(struct vx_info *vxi, void __user *data)
++{
++	struct vcmd_sched_v5 vc_data;
++
++	if (copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	if (vc_data.mask & VXSM_CPU_ID) {
++		int cpu = vc_data.cpu_id;
++		struct _vx_sched_pc *data;
++
++		if (!cpu_possible(cpu))
++			return -EINVAL;
++
++		data = &vx_per_cpu(vxi, sched_pc, cpu);
++		COPY_TOK(COPY_VALUE);
++		COPY_PRI(COPY_VALUE);
++		COPY_FRI(COPY_VALUE);
++
++		if (data->flags & VXSF_IDLE_TIME)
++			vc_data.mask |= VXSM_IDLE_TIME;
++	} else {
++		struct _vx_sched *data = &vxi->sched;
++
++		COPY_TOK(COPY_VALUE);
++		COPY_PRI(COPY_VALUE);
++		COPY_FRI(COPY_VALUE);
++	}
++
++	if (vc_data.mask & VXSM_MSEC) {
++		vc_data.interval[0] = ticks_to_msec(vc_data.interval[0]);
++		vc_data.interval[1] = ticks_to_msec(vc_data.interval[1]);
++	}
++
++	if (copy_to_user (data, &vc_data, sizeof(vc_data)))
++		return -EFAULT;
++	return 0;
++}
++
++
++int vc_sched_info(struct vx_info *vxi, void __user *data)
++{
++	struct vcmd_sched_info vc_data;
++	int cpu;
++
++	if (copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	cpu = vc_data.cpu_id;
++	if (!cpu_possible(cpu))
++		return -EINVAL;
++
++	if (vxi) {
++		struct _vx_sched_pc *sched_pc =
++			&vx_per_cpu(vxi, sched_pc, cpu);
++
++		vc_data.user_msec = ticks_to_msec(sched_pc->user_ticks);
++		vc_data.sys_msec = ticks_to_msec(sched_pc->sys_ticks);
++		vc_data.hold_msec = ticks_to_msec(sched_pc->hold_ticks);
++		vc_data.vavavoom = sched_pc->vavavoom;
++	}
++	vc_data.token_usec = ticks_to_usec(1);
++
++	if (copy_to_user (data, &vc_data, sizeof(vc_data)))
++		return -EFAULT;
++	return 0;
++}
++
+Index: linux-2.6.20/kernel/vserver/sched_init.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/kernel/vserver/sched_init.h
+@@ -0,0 +1,50 @@
++
++static inline void vx_info_init_sched(struct _vx_sched *sched)
++{
++	static struct lock_class_key tokens_lock_key;
++
++	/* scheduling; hard code starting values as constants */
++	sched->fill_rate[0]	= 1;
++	sched->interval[0]	= 4;
++	sched->fill_rate[1]	= 1;
++	sched->interval[1]	= 8;
++	sched->tokens		= HZ >> 2;
++	sched->tokens_min	= HZ >> 4;
++	sched->tokens_max	= HZ >> 1;
++	sched->tokens_lock	= SPIN_LOCK_UNLOCKED;
++	sched->prio_bias	= 0;
++
++	lockdep_set_class(&sched->tokens_lock, &tokens_lock_key);
++}
++
++static inline
++void vx_info_init_sched_pc(struct _vx_sched_pc *sched_pc, int cpu)
++{
++	sched_pc->fill_rate[0]	= 1;
++	sched_pc->interval[0]	= 4;
++	sched_pc->fill_rate[1]	= 1;
++	sched_pc->interval[1]	= 8;
++	sched_pc->tokens	= HZ >> 2;
++	sched_pc->tokens_min	= HZ >> 4;
++	sched_pc->tokens_max	= HZ >> 1;
++	sched_pc->prio_bias	= 0;
++	sched_pc->vavavoom	= 0;
++	sched_pc->token_time	= 0;
++	sched_pc->idle_time	= 0;
++	sched_pc->norm_time	= jiffies;
++
++	sched_pc->user_ticks = 0;
++	sched_pc->sys_ticks = 0;
++	sched_pc->hold_ticks = 0;
++}
++
++static inline void vx_info_exit_sched(struct _vx_sched *sched)
++{
++	return;
++}
++
++static inline
++void vx_info_exit_sched_pc(struct _vx_sched_pc *sched_pc, int cpu)
++{
++	return;
++}
+Index: linux-2.6.20/kernel/vserver/sched_proc.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/kernel/vserver/sched_proc.h
+@@ -0,0 +1,62 @@
++#ifndef _VX_SCHED_PROC_H
++#define _VX_SCHED_PROC_H
++
++
++static inline
++int vx_info_proc_sched(struct _vx_sched *sched, char *buffer)
++{
++	int length = 0;
++
++	length += sprintf(buffer,
++		"FillRate:\t%8d,%d\n"
++		"Interval:\t%8d,%d\n"
++		"TokensMin:\t%8d\n"
++		"TokensMax:\t%8d\n"
++		"PrioBias:\t%8d\n"
++		,sched->fill_rate[0]
++		,sched->fill_rate[1]
++		,sched->interval[0]
++		,sched->interval[1]
++		,sched->tokens_min
++		,sched->tokens_max
++		,sched->prio_bias
++		);
++	return length;
++}
++
++static inline
++int vx_info_proc_sched_pc(struct _vx_sched_pc *sched_pc,
++	char *buffer, int cpu)
++{
++	int length = 0;
++
++	length += sprintf(buffer + length,
++		"cpu %d: %lld %lld %lld %ld %ld"
++		,cpu
++		,(unsigned long long)sched_pc->user_ticks
++		,(unsigned long long)sched_pc->sys_ticks
++		,(unsigned long long)sched_pc->hold_ticks
++		,sched_pc->token_time
++		,sched_pc->idle_time
++		);
++	length += sprintf(buffer + length,
++		" %c%c %d %d %d %d/%d %d/%d"
++		,(sched_pc->flags & VXSF_ONHOLD) ? 'H' : 'R'
++		,(sched_pc->flags & VXSF_IDLE_TIME) ? 'I' : '-'
++		,sched_pc->tokens
++		,sched_pc->tokens_min
++		,sched_pc->tokens_max
++		,sched_pc->fill_rate[0]
++		,sched_pc->interval[0]
++		,sched_pc->fill_rate[1]
++		,sched_pc->interval[1]
++		);
++	length += sprintf(buffer + length,
++		" %d %d\n"
++		,sched_pc->prio_bias
++		,sched_pc->vavavoom
++		);
++	return length;
++}
++
++#endif	/* _VX_SCHED_PROC_H */
+Index: linux-2.6.20/kernel/vserver/signal.c
+===================================================================
+--- /dev/null
++++ linux-2.6.20/kernel/vserver/signal.c
+@@ -0,0 +1,134 @@
++/*
++ *  linux/kernel/vserver/signal.c
++ *
++ *  Virtual Server: Signal Support
++ *
++ *  Copyright (C) 2003-2007  Herbert Pötzl
++ *
++ *  V0.01  broken out from vcontext V0.05
++ *  V0.02  changed vcmds to vxi arg
++ *  V0.03  adjusted siginfo for kill
++ *
++ */
++
++#include <linux/sched.h>
++
++#include <asm/errno.h>
++#include <asm/uaccess.h>
++
++#include <linux/vs_context.h>
++#include <linux/vserver/signal_cmd.h>
++
++
++int vx_info_kill(struct vx_info *vxi, int pid, int sig)
++{
++	int retval, count=0;
++	struct task_struct *p;
++	struct siginfo *sip = SEND_SIG_PRIV;
++
++	retval = -ESRCH;
++	vxdprintk(VXD_CBIT(misc, 4),
++		"vx_info_kill(%p[#%d],%d,%d)*",
++		vxi, vxi->vx_id, pid, sig);
++	read_lock(&tasklist_lock);
++	switch (pid) {
++	case  0:
++	case -1:
++		for_each_process(p) {
++			int err = 0;
++
++			if (vx_task_xid(p) != vxi->vx_id || p->pid <= 1 ||
++				(pid && vxi->vx_initpid == p->pid))
++				continue;
++
++			err = group_send_sig_info(sig, sip, p);
++			++count;
++			if (err != -EPERM)
++				retval = err;
++		}
++		break;
++
++	case 1:
++		if (vxi->vx_initpid) {
++			pid = vxi->vx_initpid;
++			/* for now, only SIGINT to private init ... */
++			if (!vx_info_flags(vxi, VXF_STATE_ADMIN, 0) &&
++				/* ... as long as there are tasks left */
++				(atomic_read(&vxi->vx_tasks) > 1))
++				sig = SIGINT;
++		}
++		/* fallthrough */
++	default:
++		p = find_task_by_real_pid(pid);
++		if (p) {
++			if (vx_task_xid(p) == vxi->vx_id)
++				retval = group_send_sig_info(sig, sip, p);
++		}
++		break;
++	}
++	read_unlock(&tasklist_lock);
++	vxdprintk(VXD_CBIT(misc, 4),
++		"vx_info_kill(%p[#%d],%d,%d,%ld) = %d",
++		vxi, vxi->vx_id, pid, sig, (long)sip, retval);
++	return retval;
++}
++
++int vc_ctx_kill(struct vx_info *vxi, void __user *data)
++{
++	struct vcmd_ctx_kill_v0 vc_data;
++
++	if (copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	/* special check to allow guest shutdown */
++	if (!vx_info_flags(vxi, VXF_STATE_ADMIN, 0) &&
++		/* forbid killall pid=0 when init is present */
++		(((vc_data.pid < 1) && vxi->vx_initpid) ||
++		(vc_data.pid > 1)))
++		return -EACCES;
++
++	return vx_info_kill(vxi, vc_data.pid, vc_data.sig);
++}
++
++
++static int __wait_exit(struct vx_info *vxi)
++{
++	DECLARE_WAITQUEUE(wait, current);
++	int ret = 0;
++
++	add_wait_queue(&vxi->vx_wait, &wait);
++	set_current_state(TASK_INTERRUPTIBLE);
++
++wait:
++	if (vx_info_state(vxi,
++		VXS_SHUTDOWN|VXS_HASHED|VXS_HELPER) == VXS_SHUTDOWN)
++		goto out;
++	if (signal_pending(current)) {
++		ret = -ERESTARTSYS;
++		goto out;
++	}
++	schedule();
++	goto wait;
++
++out:
++	set_current_state(TASK_RUNNING);
++	remove_wait_queue(&vxi->vx_wait, &wait);
++	return ret;
++}
++
++
++
++int vc_wait_exit(struct vx_info *vxi, void __user *data)
++{
++	struct vcmd_wait_exit_v0 vc_data;
++	int ret;
++
++	ret = __wait_exit(vxi);
++	vc_data.reboot_cmd = vxi->reboot_cmd;
++	vc_data.exit_code = vxi->exit_code;
++
++	if (copy_to_user (data, &vc_data, sizeof(vc_data)))
++		ret = -EFAULT;
++	return ret;
++}
++
+Index: linux-2.6.20/kernel/vserver/space.c
+===================================================================
+--- /dev/null
++++ linux-2.6.20/kernel/vserver/space.c
+@@ -0,0 +1,279 @@
++/*
++ *  linux/kernel/vserver/space.c
++ *
++ *  Virtual Server: Context Space Support
++ *
++ *  Copyright (C) 2003-2006  Herbert Pötzl
++ *
++ *  V0.01  broken out from context.c 0.07
++ *  V0.02  added task locking for namespace
++ *  V0.03  broken out vx_enter_namespace
++ *  V0.04  added *space support and commands
++ *
++ */
++
++#include <linux/utsname.h>
++#include <linux/sched.h>
++#include <linux/vs_context.h>
++#include <linux/vserver/space.h>
++#include <linux/vserver/space_cmd.h>
++#include <linux/dcache.h>
++#include <linux/mount.h>
++#include <linux/nsproxy.h>
++#include <linux/fs.h>
++
++#include <asm/errno.h>
++#include <asm/uaccess.h>
++
++
++atomic_t vs_global_nsproxy	= ATOMIC_INIT(0);
++atomic_t vs_global_fs		= ATOMIC_INIT(0);
++atomic_t vs_global_mnt_ns	= ATOMIC_INIT(0);
++atomic_t vs_global_uts_ns	= ATOMIC_INIT(0);
++atomic_t vs_global_ipc_ns	= ATOMIC_INIT(0);
++
++
++/* namespace functions */
++
++#include <linux/mnt_namespace.h>
++
++const struct vcmd_space_mask space_mask = {
++	.mask = CLONE_NEWNS |
++		CLONE_NEWUTS |
++		CLONE_NEWIPC |
++		CLONE_FS
++};
++
++
++/*
++ *	build a new nsproxy mix
++ *      assumes that both proxies are 'const'
++ *	does not touch nsproxy refcounts
++ *	will hold a reference on the result.
++ */
++
++struct nsproxy *vs_mix_nsproxy(struct nsproxy *old_nsproxy,
++	struct nsproxy *new_nsproxy, unsigned long mask)
++{
++	struct mnt_namespace *old_ns;
++	struct uts_namespace *old_uts;
++	struct ipc_namespace *old_ipc;
++	struct nsproxy *nsproxy;
++
++	nsproxy = dup_namespaces(old_nsproxy);
++	if (!nsproxy)
++		goto out;
++
++	if (mask & CLONE_NEWNS) {
++		old_ns = nsproxy->mnt_ns;
++		nsproxy->mnt_ns = new_nsproxy->mnt_ns;
++		if (nsproxy->mnt_ns)
++			get_mnt_ns(nsproxy->mnt_ns);
++	} else
++		old_ns = NULL;
++
++	if (mask & CLONE_NEWUTS) {
++		old_uts = nsproxy->uts_ns;
++		nsproxy->uts_ns = new_nsproxy->uts_ns;
++		if (nsproxy->uts_ns)
++			get_uts_ns(nsproxy->uts_ns);
++	} else
++		old_uts = NULL;
++
++	if (mask & CLONE_NEWIPC) {
++		old_ipc = nsproxy->ipc_ns;
++		nsproxy->ipc_ns = new_nsproxy->ipc_ns;
++		if (nsproxy->ipc_ns)
++			get_ipc_ns(nsproxy->ipc_ns);
++	} else
++		old_ipc = NULL;
++
++	if (old_ns)
++		put_mnt_ns(old_ns);
++	if (old_uts)
++		put_uts_ns(old_uts);
++	if (old_ipc)
++		put_ipc_ns(old_ipc);
++out:
++	return nsproxy;
++}
++
++
++/*
++ *	merge two nsproxy structs into a new one.
++ *	will hold a reference on the result.
++ */
++
++static inline
++struct nsproxy * __vs_merge_nsproxy(struct nsproxy *old,
++	struct nsproxy *proxy, unsigned long mask)
++{
++	struct nsproxy null_proxy = { .mnt_ns = NULL };
++
++	if (!proxy)
++		return NULL;
++
++	if (mask)
++		return vs_mix_nsproxy(old ? old : &null_proxy,
++			proxy, mask);
++	get_nsproxy(proxy);
++	return proxy;
++}
++
++/*
++ *	merge two fs structs into a new one.
++ *	will take a reference on the result.
++ */
++
++static inline
++struct fs_struct * __vs_merge_fs(struct fs_struct *old,
++	struct fs_struct *fs, unsigned long mask)
++{
++	if (!(mask & CLONE_FS)) {
++		if (old)
++			atomic_inc(&old->count);
++		return old;
++	}
++
++	if (!fs)
++		return NULL;
++
++	return copy_fs_struct(fs);
++}
++
++
++int vx_enter_space(struct vx_info *vxi, unsigned long mask)
++{
++	struct nsproxy *proxy, *proxy_cur, *proxy_new;
++	struct fs_struct *fs, *fs_cur, *fs_new;
++	int ret;
++
++	if (vx_info_flags(vxi, VXF_INFO_PRIVATE, 0))
++		return -EACCES;
++
++	if (!mask)
++		mask = vxi->vx_nsmask;
++
++	if ((mask & vxi->vx_nsmask) != mask)
++		return -EINVAL;
++
++	proxy = vxi->vx_nsproxy;
++	fs = vxi->vx_fs;
++
++	task_lock(current);
++	fs_cur = current->fs;
++	atomic_inc(&fs_cur->count);
++	proxy_cur = current->nsproxy;
++	get_nsproxy(proxy_cur);
++	task_unlock(current);
++
++	fs_new = __vs_merge_fs(fs_cur, fs, mask);
++	if (IS_ERR(fs_new)) {
++		ret = PTR_ERR(fs_new);
++		goto out_put;
++	}
++
++	proxy_new = __vs_merge_nsproxy(proxy_cur, proxy, mask);
++	if (IS_ERR(proxy_new)) {
++		ret = PTR_ERR(proxy_new);
++		goto out_put_fs;
++	}
++
++	fs_new = xchg(&current->fs, fs_new);
++	proxy_new = xchg(&current->nsproxy, proxy_new);
++	ret = 0;
++
++	if (proxy_new)
++		put_nsproxy(proxy_new);
++out_put_fs:
++	if (fs_new)
++		put_fs_struct(fs_new);
++out_put:
++	if (proxy_cur)
++		put_nsproxy(proxy_cur);
++	if (fs_cur)
++		put_fs_struct(fs_cur);
++	return ret;
++}
++
++
++int vx_set_space(struct vx_info *vxi, unsigned long mask)
++{
++	struct nsproxy *proxy_vxi, *proxy_cur, *proxy_new;
++	struct fs_struct *fs_vxi, *fs_cur, *fs_new;
++	int ret;
++
++	if (!mask)
++		mask = space_mask.mask;
++
++	if ((mask & space_mask.mask) != mask)
++		return -EINVAL;
++
++	proxy_vxi = vxi->vx_nsproxy;
++	fs_vxi = vxi->vx_fs;
++
++	task_lock(current);
++	fs_cur = current->fs;
++	atomic_inc(&fs_cur->count);
++	proxy_cur = current->nsproxy;
++	get_nsproxy(proxy_cur);
++	task_unlock(current);
++
++	fs_new = __vs_merge_fs(fs_vxi, fs_cur, mask);
++	if (IS_ERR(fs_new)) {
++		ret = PTR_ERR(fs_new);
++		goto out_put;
++	}
++
++	proxy_new = __vs_merge_nsproxy(proxy_vxi, proxy_cur, mask);
++	if (IS_ERR(proxy_new)) {
++		ret = PTR_ERR(proxy_new);
++		goto out_put_fs;
++	}
++
++	fs_new = xchg(&vxi->vx_fs, fs_new);
++	proxy_new = xchg(&vxi->vx_nsproxy, proxy_new);
++	vxi->vx_nsmask |= mask;
++	ret = 0;
++
++	if (proxy_new)
++		put_nsproxy(proxy_new);
++out_put_fs:
++	if (fs_new)
++		put_fs_struct(fs_new);
++out_put:
++	if (proxy_cur)
++		put_nsproxy(proxy_cur);
++	if (fs_cur)
++		put_fs_struct(fs_cur);
++	return ret;
++}
++
++
++int vc_enter_space(struct vx_info *vxi, void __user *data)
++{
++	struct vcmd_space_mask vc_data = { .mask = 0 };
++
++	if (data && copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	return vx_enter_space(vxi, vc_data.mask);
++}
++
++int vc_set_space(struct vx_info *vxi, void __user *data)
++{
++	struct vcmd_space_mask vc_data = { .mask = 0 };
++
++	if (data && copy_from_user (&vc_data, data, sizeof(vc_data)))
++		return -EFAULT;
++
++	return vx_set_space(vxi, vc_data.mask);
++}
++
++int vc_get_space_mask(struct vx_info *vxi, void __user *data)
++{
++	if (copy_to_user(data, &space_mask, sizeof(space_mask)))
++		return -EFAULT;
++	return 0;
++}
++
+Index: linux-2.6.20/kernel/vserver/switch.c
+===================================================================
+--- /dev/null
++++ linux-2.6.20/kernel/vserver/switch.c
+@@ -0,0 +1,479 @@
++/*
++ *  linux/kernel/vserver/switch.c
++ *
++ *  Virtual Server: Syscall Switch
++ *
++ *  Copyright (C) 2003-2006  Herbert Pötzl
++ *
++ *  V0.01  syscall switch
++ *  V0.02  added signal to context
++ *  V0.03  added rlimit functions
++ *  V0.04  added iattr, task/xid functions
++ *  V0.05  added debug/history stuff
++ *  V0.06  added compat32 layer
++ *  V0.07  vcmd args and perms
++ *  V0.08  added status commands
++ *
++ */
++
++#include <linux/linkage.h>
++#include <linux/sched.h>
++#include <linux/compat.h>
++#include <asm/errno.h>
++
++#include <linux/vs_context.h>
++#include <linux/vs_network.h>
++#include <linux/vserver/switch.h>
++
++#include "vci_config.h"
++
++static inline
++int vc_get_version(uint32_t id)
++{
++	return VCI_VERSION;
++}
++
++static inline
++int vc_get_vci(uint32_t id)
++{
++	return vci_kernel_config();
++}
++
++#include <linux/vserver/context_cmd.h>
++#include <linux/vserver/cvirt_cmd.h>
++#include <linux/vserver/cacct_cmd.h>
++#include <linux/vserver/limit_cmd.h>
++#include <linux/vserver/network_cmd.h>
++#include <linux/vserver/sched_cmd.h>
++#include <linux/vserver/debug_cmd.h>
++#include <linux/vserver/inode_cmd.h>
++#include <linux/vserver/dlimit_cmd.h>
++#include <linux/vserver/signal_cmd.h>
++#include <linux/vserver/space_cmd.h>
++
++#include <linux/vserver/inode.h>
++#include <linux/vserver/dlimit.h>
++
++
++#ifdef	CONFIG_COMPAT
++#define __COMPAT(name, id, data, compat)	\
++	(compat) ? name ## _x32 (id, data) : name (id, data)
++#else
++#define __COMPAT(name, id, data, compat)	\
++	name (id, data)
++#endif
++
++
++static inline
++long do_vcmd(uint32_t cmd, uint32_t id,
++	struct vx_info *vxi, struct nx_info *nxi,
++	void __user *data, int compat)
++{
++	switch (cmd) {
++
++	case VCMD_get_version:
++		return vc_get_version(id);
++	case VCMD_get_vci:
++		return vc_get_vci(id);
++
++	case VCMD_task_xid:
++		return vc_task_xid(id, data);
++	case VCMD_vx_info:
++		return vc_vx_info(vxi, data);
++
++	case VCMD_task_nid:
++		return vc_task_nid(id, data);
++	case VCMD_nx_info:
++		return vc_nx_info(nxi, data);
++
++	case VCMD_set_space_v0:
++	/* this is version 1 */
++	case VCMD_set_space:
++		return vc_set_space(vxi, data);
++
++	case VCMD_get_space_mask:
++		return vc_get_space_mask(vxi, data);
++
++#ifdef	CONFIG_IA32_EMULATION
++	case VCMD_get_rlimit:
++		return __COMPAT(vc_get_rlimit, vxi, data, compat);
++	case VCMD_set_rlimit:
++		return __COMPAT(vc_set_rlimit, vxi, data, compat);
++#else
++	case VCMD_get_rlimit:
++		return vc_get_rlimit(vxi, data);
++	case VCMD_set_rlimit:
++		return vc_set_rlimit(vxi, data);
++#endif
++	case VCMD_get_rlimit_mask:
++		return vc_get_rlimit_mask(id, data);
++	case VCMD_reset_minmax:
++		return vc_reset_minmax(vxi, data);
++
++	case VCMD_get_vhi_name:
++		return vc_get_vhi_name(vxi, data);
++	case VCMD_set_vhi_name:
++		return vc_set_vhi_name(vxi, data);
++
++	case VCMD_ctx_stat:
++		return vc_ctx_stat(vxi, data);
++	case VCMD_virt_stat:
++		return vc_virt_stat(vxi, data);
++	case VCMD_sock_stat:
++		return vc_sock_stat(vxi, data);
++	case VCMD_rlimit_stat:
++		return vc_rlimit_stat(vxi, data);
++
++	case VCMD_set_cflags:
++		return vc_set_cflags(vxi, data);
++	case VCMD_get_cflags:
++		return vc_get_cflags(vxi, data);
++
++	case VCMD_set_ccaps_v0:
++		return vc_set_ccaps_v0(vxi, data);
++	/* this is version 1 */
++	case VCMD_set_ccaps:
++		return vc_set_ccaps(vxi, data);
++	case VCMD_get_ccaps_v0:
++		return vc_get_ccaps_v0(vxi, data);
++	/* this is version 1 */
++	case VCMD_get_ccaps:
++		return vc_get_ccaps(vxi, data);
++	case VCMD_set_bcaps:
++		return vc_set_bcaps(vxi, data);
++	case VCMD_get_bcaps:
++		return vc_get_bcaps(vxi, data);
++
++	case VCMD_set_nflags:
++		return vc_set_nflags(nxi, data);
++	case VCMD_get_nflags:
++		return vc_get_nflags(nxi, data);
++
++	case VCMD_set_ncaps:
++		return vc_set_ncaps(nxi, data);
++	case VCMD_get_ncaps:
++		return vc_get_ncaps(nxi, data);
++
++	case VCMD_set_sched_v3:
++		return vc_set_sched_v3(vxi, data);
++	case VCMD_set_sched_v4:
++		return vc_set_sched_v4(vxi, data);
++	/* this is version 5 */
++	case VCMD_set_sched:
++		return vc_set_sched(vxi, data);
++	case VCMD_get_sched:
++		return vc_get_sched(vxi, data);
++	case VCMD_sched_info:
++		return vc_sched_info(vxi, data);
++
++	case VCMD_add_dlimit:
++		return __COMPAT(vc_add_dlimit, id, data, compat);
++	case VCMD_rem_dlimit:
++		return __COMPAT(vc_rem_dlimit, id, data, compat);
++	case VCMD_set_dlimit:
++		return __COMPAT(vc_set_dlimit, id, data, compat);
++	case VCMD_get_dlimit:
++		return __COMPAT(vc_get_dlimit, id, data, compat);
++
++	case VCMD_ctx_kill:
++		return vc_ctx_kill(vxi, data);
++
++	case VCMD_wait_exit:
++		return vc_wait_exit(vxi, data);
++
++	case VCMD_get_iattr:
++		return __COMPAT(vc_get_iattr, id, data, compat);
++	case VCMD_set_iattr:
++		return __COMPAT(vc_set_iattr, id, data, compat);
++
++	case VCMD_enter_space_v0:
++		return vc_enter_space(vxi, NULL);
++	/* this is version 1 */
++	case VCMD_enter_space:
++		return vc_enter_space(vxi, data);
++
++	case VCMD_ctx_create_v0:
++		return vc_ctx_create(id, NULL);
++	case VCMD_ctx_create:
++		return vc_ctx_create(id, data);
++	case VCMD_ctx_migrate_v0:
++		return vc_ctx_migrate(vxi, NULL);
++	case VCMD_ctx_migrate:
++		return vc_ctx_migrate(vxi, data);
++
++	case VCMD_net_create_v0:
++		return vc_net_create(id, NULL);
++	case VCMD_net_create:
++		return vc_net_create(id, data);
++	case VCMD_net_migrate:
++		return vc_net_migrate(nxi, data);
++	case VCMD_net_add:
++		return vc_net_add(nxi, data);
++	case VCMD_net_remove:
++		return vc_net_remove(nxi, data);
++
++#ifdef	CONFIG_VSERVER_HISTORY
++	case VCMD_dump_history:
++		return vc_dump_history(id);
++	case VCMD_read_history:
++		return __COMPAT(vc_read_history, id, data, compat);
++#endif
++#ifdef	CONFIG_VSERVER_MONITOR
++	case VCMD_read_monitor:
++		return __COMPAT(vc_read_monitor, id, data, compat);
++#endif
++	default:
++		vxwprintk(1, "unimplemented VCMD_%02d_%d[%d]",
++			VC_CATEGORY(cmd), VC_COMMAND(cmd), VC_VERSION(cmd));
++	}
++	return -ENOSYS;
++}
++
++
++#define	__VCMD(vcmd, _perm, _args, _flags)		\
++	case VCMD_ ## vcmd: perm = _perm;		\
++		args = _args; flags = _flags; break
++
++
++#define VCA_NONE	0x00
++#define VCA_VXI		0x01
++#define VCA_NXI		0x02
++
++#define VCF_NONE	0x00
++#define VCF_INFO	0x01
++#define VCF_ADMIN	0x02
++#define VCF_ARES	0x06	/* includes admin */
++#define VCF_SETUP	0x08
++
++#define VCF_ZIDOK	0x10	/* zero id okay */
++
++
++static inline
++long do_vserver(uint32_t cmd, uint32_t id, void __user *data, int compat)
++{
++	long ret;
++	int permit = -1, state = 0;
++	int perm = -1, args = 0, flags = 0;
++	struct vx_info *vxi = NULL;
++	struct nx_info *nxi = NULL;
++
++	switch (cmd) {
++	/* unpriviledged commands */
++	__VCMD(get_version,	 0, VCA_NONE,	0);
++	__VCMD(get_vci,		 0, VCA_NONE,	0);
++	__VCMD(get_rlimit_mask,	 0, VCA_NONE,	0);
++	__VCMD(get_space_mask,	 0, VCA_NONE,   0);
++
++	/* info commands */
++	__VCMD(task_xid,	 2, VCA_NONE,	0);
++	__VCMD(reset_minmax,	 2, VCA_VXI,	0);
++	__VCMD(vx_info,		 3, VCA_VXI,	VCF_INFO);
++	__VCMD(get_bcaps,	 3, VCA_VXI,	VCF_INFO);
++	__VCMD(get_ccaps_v0,	 3, VCA_VXI,	VCF_INFO);
++	__VCMD(get_ccaps,	 3, VCA_VXI,	VCF_INFO);
++	__VCMD(get_cflags,	 3, VCA_VXI,	VCF_INFO);
++	__VCMD(get_vhi_name,	 3, VCA_VXI,	VCF_INFO);
++	__VCMD(get_rlimit,	 3, VCA_VXI,	VCF_INFO);
++
++	__VCMD(ctx_stat,	 3, VCA_VXI,	VCF_INFO);
++	__VCMD(virt_stat,	 3, VCA_VXI,	VCF_INFO);
++	__VCMD(sock_stat,	 3, VCA_VXI,	VCF_INFO);
++	__VCMD(rlimit_stat,	 3, VCA_VXI,	VCF_INFO);
++
++	__VCMD(task_nid,	 2, VCA_NONE,	0);
++	__VCMD(nx_info,		 3, VCA_NXI,	VCF_INFO);
++	__VCMD(get_ncaps,	 3, VCA_NXI,	VCF_INFO);
++	__VCMD(get_nflags,	 3, VCA_NXI,	VCF_INFO);
++
++	__VCMD(get_iattr,	 2, VCA_NONE,	0);
++	__VCMD(get_dlimit,	 3, VCA_NONE,	VCF_INFO);
++	__VCMD(get_sched,	 3, VCA_VXI,	VCF_INFO);
++	__VCMD(sched_info,	 3, VCA_VXI,	VCF_INFO|VCF_ZIDOK);
++
++	/* lower admin commands */
++	__VCMD(wait_exit,	 4, VCA_VXI,	VCF_INFO);
++	__VCMD(ctx_create_v0,	 5, VCA_NONE,	0);
++	__VCMD(ctx_create,	 5, VCA_NONE,	0);
++	__VCMD(ctx_migrate_v0,	 5, VCA_VXI,	VCF_ADMIN);
++	__VCMD(ctx_migrate,	 5, VCA_VXI,	VCF_ADMIN);
++	__VCMD(enter_space_v0,	 5, VCA_VXI,	VCF_ADMIN);
++	__VCMD(enter_space,	 5, VCA_VXI,	VCF_ADMIN);
++
++	__VCMD(net_create_v0,	 5, VCA_NONE,	0);
++	__VCMD(net_create,	 5, VCA_NONE,	0);
++	__VCMD(net_migrate,	 5, VCA_NXI,	VCF_ADMIN);
++
++	/* higher admin commands */
++	__VCMD(ctx_kill,	 6, VCA_VXI,	VCF_ARES);
++	__VCMD(set_space_v0,	 7, VCA_VXI,	VCF_ARES|VCF_SETUP);
++	__VCMD(set_space,	 7, VCA_VXI,	VCF_ARES|VCF_SETUP);
++
++	__VCMD(set_ccaps_v0,	 7, VCA_VXI,	VCF_ARES|VCF_SETUP);
++	__VCMD(set_ccaps,	 7, VCA_VXI,	VCF_ARES|VCF_SETUP);
++	__VCMD(set_bcaps,	 7, VCA_VXI,	VCF_ARES|VCF_SETUP);
++	__VCMD(set_cflags,	 7, VCA_VXI,	VCF_ARES|VCF_SETUP);
++
++	__VCMD(set_vhi_name,	 7, VCA_VXI,	VCF_ARES|VCF_SETUP);
++	__VCMD(set_rlimit,	 7, VCA_VXI,	VCF_ARES|VCF_SETUP);
++	__VCMD(set_sched,	 7, VCA_VXI,	VCF_ARES|VCF_SETUP);
++	__VCMD(set_sched_v2,	 7, VCA_VXI,	VCF_ARES|VCF_SETUP);
++	__VCMD(set_sched_v3,	 7, VCA_VXI,	VCF_ARES|VCF_SETUP);
++	__VCMD(set_sched_v4,	 7, VCA_VXI,	VCF_ARES|VCF_SETUP);
++
++	__VCMD(set_ncaps,	 7, VCA_NXI,	VCF_ARES|VCF_SETUP);
++	__VCMD(set_nflags,	 7, VCA_NXI,	VCF_ARES|VCF_SETUP);
++	__VCMD(net_add,		 8, VCA_NXI,	VCF_ARES|VCF_SETUP);
++	__VCMD(net_remove,	 8, VCA_NXI,	VCF_ARES|VCF_SETUP);
++
++	__VCMD(set_iattr,	 7, VCA_NONE,	0);
++	__VCMD(set_dlimit,	 7, VCA_NONE,	VCF_ARES);
++	__VCMD(add_dlimit,	 8, VCA_NONE,	VCF_ARES);
++	__VCMD(rem_dlimit,	 8, VCA_NONE,	VCF_ARES);
++
++	/* debug level admin commands */
++#ifdef	CONFIG_VSERVER_HISTORY
++	__VCMD(dump_history,	 9, VCA_NONE,	0);
++	__VCMD(read_history,	 9, VCA_NONE,	0);
++#endif
++#ifdef	CONFIG_VSERVER_MONITOR
++	__VCMD(read_monitor,	 9, VCA_NONE,	0);
++#endif
++	default:
++		perm = -1;
++	}
++
++	vxdprintk(VXD_CBIT(switch, 0),
++		"vc: VCMD_%02d_%d[%d], %d,%p [%d,%d,%x,%x]",
++		VC_CATEGORY(cmd), VC_COMMAND(cmd),
++		VC_VERSION(cmd), id, data, compat,
++		perm, args, flags);
++
++	ret = -ENOSYS;
++	if (perm < 0)
++		goto out;
++
++	state = 1;
++	if (!capable(CAP_CONTEXT))
++		goto out;
++
++	state = 2;
++	/* moved here from the individual commands */
++	ret = -EPERM;
++	if ((perm > 1) && !capable(CAP_SYS_ADMIN))
++		goto out;
++
++	state = 3;
++	/* vcmd involves resource management  */
++	ret = -EPERM;
++	if ((flags & VCF_ARES) && !capable(CAP_SYS_RESOURCE))
++		goto out;
++
++	state = 4;
++	/* various legacy exceptions */
++	switch (cmd) {
++	/* will go away when spectator is a cap */
++	case VCMD_ctx_migrate_v0:
++	case VCMD_ctx_migrate:
++		if (id == 1) {
++			current->xid = 1;
++			ret = 1;
++			goto out;
++		}
++		break;
++
++	/* will go away when spectator is a cap */
++	case VCMD_net_migrate:
++		if (id == 1) {
++			current->nid = 1;
++			ret = 1;
++			goto out;
++		}
++		break;
++
++	/* legacy special casing */
++	case VCMD_set_space_v0:
++		id = -1;
++		break;
++	}
++
++	/* vcmds are fine by default */
++	permit = 1;
++
++	/* admin type vcmds require admin ... */
++	if (flags & VCF_ADMIN)
++		permit = vx_check(0, VS_ADMIN) ? 1 : 0;
++
++	/* ... but setup type vcmds override that */
++	if (!permit && (flags & VCF_SETUP))
++		permit = vx_flags(VXF_STATE_SETUP, 0) ? 2 : 0;
++
++	state = 5;
++	ret = -EPERM;
++	if (!permit)
++		goto out;
++
++	state = 6;
++	if (!id && (flags & VCF_ZIDOK))
++		goto skip_id;
++
++	ret = -ESRCH;
++	if (args & VCA_VXI) {
++		vxi = lookup_vx_info(id);
++		if (!vxi)
++			goto out;
++
++		if ((flags & VCF_ADMIN) &&
++			/* special case kill for shutdown */
++			(cmd != VCMD_ctx_kill) &&
++			/* can context be administrated? */
++			!vx_info_flags(vxi, VXF_STATE_ADMIN, 0)) {
++			ret = -EACCES;
++			goto out_vxi;
++		}
++	}
++	state = 7;
++	if (args & VCA_NXI) {
++		nxi = lookup_nx_info(id);
++		if (!nxi)
++			goto out_vxi;
++
++		if ((flags & VCF_ADMIN) &&
++			/* can context be administrated? */
++			!nx_info_flags(nxi, NXF_STATE_ADMIN, 0)) {
++			ret = -EACCES;
++			goto out_nxi;
++		}
++	}
++skip_id:
++	state = 8;
++	ret = do_vcmd(cmd, id, vxi, nxi, data, compat);
++
++out_nxi:
++	if ((args & VCA_NXI) && nxi)
++		put_nx_info(nxi);
++out_vxi:
++	if ((args & VCA_VXI) && vxi)
++		put_vx_info(vxi);
++out:
++	vxdprintk(VXD_CBIT(switch, 1),
++		"vc: VCMD_%02d_%d[%d] = %08lx(%ld) [%d,%d]",
++		VC_CATEGORY(cmd), VC_COMMAND(cmd),
++		VC_VERSION(cmd), ret, ret, state, permit);
++	return ret;
++}
++
++asmlinkage long
++sys_vserver(uint32_t cmd, uint32_t id, void __user *data)
++{
++	return do_vserver(cmd, id, data, 0);
++}
++
++#ifdef	CONFIG_COMPAT
++
++asmlinkage long
++sys32_vserver(uint32_t cmd, uint32_t id, void __user *data)
++{
++	return do_vserver(cmd, id, data, 1);
++}
++
++#endif	/* CONFIG_COMPAT */
+Index: linux-2.6.20/kernel/vserver/sysctl.c
+===================================================================
+--- /dev/null
++++ linux-2.6.20/kernel/vserver/sysctl.c
+@@ -0,0 +1,242 @@
++/*
++ *  kernel/vserver/sysctl.c
++ *
++ *  Virtual Context Support
++ *
++ *  Copyright (C) 2004-2005  Herbert Pötzl
++ *
++ *  V0.01  basic structure
++ *
++ */
++
++#include <linux/errno.h>
++#include <linux/module.h>
++#include <linux/types.h>
++#include <linux/ctype.h>
++#include <linux/sysctl.h>
++#include <linux/parser.h>
++#include <linux/fs.h>
++
++#include <asm/uaccess.h>
++#include <asm/unistd.h>
++
++
++#define CTL_VSERVER	4242    /* unused? */
++
++enum {
++	CTL_DEBUG_ERROR		= 0,
++	CTL_DEBUG_SWITCH	= 1,
++	CTL_DEBUG_XID,
++	CTL_DEBUG_NID,
++	CTL_DEBUG_TAG,
++	CTL_DEBUG_NET,
++	CTL_DEBUG_LIMIT,
++	CTL_DEBUG_CRES,
++	CTL_DEBUG_DLIM,
++	CTL_DEBUG_QUOTA,
++	CTL_DEBUG_CVIRT,
++	CTL_DEBUG_MISC,
++};
++
++
++unsigned int vx_debug_switch	= 0;
++unsigned int vx_debug_xid	= 0;
++unsigned int vx_debug_nid	= 0;
++unsigned int vx_debug_tag	= 0;
++unsigned int vx_debug_net	= 0;
++unsigned int vx_debug_limit	= 0;
++unsigned int vx_debug_cres	= 0;
++unsigned int vx_debug_dlim	= 0;
++unsigned int vx_debug_quota	= 0;
++unsigned int vx_debug_cvirt	= 0;
++unsigned int vx_debug_misc	= 0;
++
++
++static struct ctl_table_header *vserver_table_header;
++static ctl_table vserver_table[];
++
++
++void vserver_register_sysctl(void)
++{
++	if (!vserver_table_header) {
++		vserver_table_header = register_sysctl_table(vserver_table, 1);
++	}
++
++}
++
++void vserver_unregister_sysctl(void)
++{
++	if (vserver_table_header) {
++		unregister_sysctl_table(vserver_table_header);
++		vserver_table_header = NULL;
++	}
++}
++
++
++static int proc_dodebug(ctl_table *table, int write,
++	struct file *filp, void __user *buffer, size_t *lenp, loff_t *ppos)
++{
++	char		tmpbuf[20], *p, c;
++	unsigned int	value;
++	size_t		left, len;
++
++	if ((*ppos && !write) || !*lenp) {
++		*lenp = 0;
++		return 0;
++	}
++
++	left = *lenp;
++
++	if (write) {
++		if (!access_ok(VERIFY_READ, buffer, left))
++			return -EFAULT;
++		p = (char *) buffer;
++		while (left && __get_user(c, p) >= 0 && isspace(c))
++			left--, p++;
++		if (!left)
++			goto done;
++
++		if (left > sizeof(tmpbuf) - 1)
++			return -EINVAL;
++		if (copy_from_user(tmpbuf, p, left))
++			return -EFAULT;
++		tmpbuf[left] = '\0';
++
++		for (p = tmpbuf, value = 0; '0' <= *p && *p <= '9'; p++, left--)
++			value = 10 * value + (*p - '0');
++		if (*p && !isspace(*p))
++			return -EINVAL;
++		while (left && isspace(*p))
++			left--, p++;
++		*(unsigned int *) table->data = value;
++	} else {
++		if (!access_ok(VERIFY_WRITE, buffer, left))
++			return -EFAULT;
++		len = sprintf(tmpbuf, "%d", *(unsigned int *) table->data);
++		if (len > left)
++			len = left;
++		if (__copy_to_user(buffer, tmpbuf, len))
++			return -EFAULT;
++		if ((left -= len) > 0) {
++			if (put_user('\n', (char *)buffer + len))
++				return -EFAULT;
++			left--;
++		}
++	}
++
++done:
++	*lenp -= left;
++	*ppos += *lenp;
++	return 0;
++}
++
++
++#define	CTL_ENTRY(ctl, name)				\
++	{						\
++		.ctl_name	= ctl,			\
++		.procname	= #name,		\
++		.data		= &vx_##name,		\
++		.maxlen		= sizeof(int),		\
++		.mode		= 0644,			\
++		.proc_handler	= &proc_dodebug		\
++	}
++
++static ctl_table debug_table[] = {
++	CTL_ENTRY (CTL_DEBUG_SWITCH,	debug_switch),
++	CTL_ENTRY (CTL_DEBUG_XID,	debug_xid),
++	CTL_ENTRY (CTL_DEBUG_NID,	debug_nid),
++	CTL_ENTRY (CTL_DEBUG_TAG,	debug_tag),
++	CTL_ENTRY (CTL_DEBUG_NET,	debug_net),
++	CTL_ENTRY (CTL_DEBUG_LIMIT,	debug_limit),
++	CTL_ENTRY (CTL_DEBUG_CRES,	debug_cres),
++	CTL_ENTRY (CTL_DEBUG_DLIM,	debug_dlim),
++	CTL_ENTRY (CTL_DEBUG_QUOTA,	debug_quota),
++	CTL_ENTRY (CTL_DEBUG_CVIRT,	debug_cvirt),
++	CTL_ENTRY (CTL_DEBUG_MISC,	debug_misc),
++	{ .ctl_name = 0 }
++};
++
++static ctl_table vserver_table[] = {
++	{
++		.ctl_name	= CTL_VSERVER,
++		.procname	= "vserver",
++		.mode		= 0555,
++		.child		= debug_table
++	},
++	{ .ctl_name = 0 }
++};
++
++
++static match_table_t tokens = {
++	{ CTL_DEBUG_SWITCH,	"switch=%x"	},
++	{ CTL_DEBUG_XID,	"xid=%x"	},
++	{ CTL_DEBUG_NID,	"nid=%x"	},
++	{ CTL_DEBUG_TAG,	"tag=%x"	},
++	{ CTL_DEBUG_NET,	"net=%x"	},
++	{ CTL_DEBUG_LIMIT,	"limit=%x"	},
++	{ CTL_DEBUG_CRES,	"cres=%x"	},
++	{ CTL_DEBUG_DLIM,	"dlim=%x"	},
++	{ CTL_DEBUG_QUOTA,	"quota=%x"	},
++	{ CTL_DEBUG_CVIRT,	"cvirt=%x"	},
++	{ CTL_DEBUG_MISC,	"misc=%x"	},
++	{ CTL_DEBUG_ERROR,	NULL		}
++};
++
++#define	HANDLE_CASE(id, name, val)				\
++	case CTL_DEBUG_ ## id:					\
++		vx_debug_ ## name = val;			\
++		printk("vs_debug_" #name "=0x%x\n", val);	\
++		break
++
++
++static int __init vs_debug_setup(char *str)
++{
++	char *p;
++	int token;
++
++	printk("vs_debug_setup(%s)\n", str);
++	while ((p = strsep(&str, ",")) != NULL) {
++		substring_t args[MAX_OPT_ARGS];
++		unsigned int value;
++
++		if (!*p)
++			continue;
++
++		token = match_token(p, tokens, args);
++		value = (token>0)?simple_strtoul(args[0].from, NULL, 0):0;
++
++		switch (token) {
++		HANDLE_CASE(SWITCH, switch, value);
++		HANDLE_CASE(XID,    xid,    value);
++		HANDLE_CASE(NID,    nid,    value);
++		HANDLE_CASE(TAG,    tag,    value);
++		HANDLE_CASE(NET,    net,    value);
++		HANDLE_CASE(LIMIT,  limit,  value);
++		HANDLE_CASE(CRES,   cres,   value);
++		HANDLE_CASE(DLIM,   dlim,   value);
++		HANDLE_CASE(QUOTA,  quota,  value);
++		HANDLE_CASE(CVIRT,  cvirt,  value);
++		HANDLE_CASE(MISC,   misc,   value);
++		default:
++			return -EINVAL;
++			break;
++		}
++	}
++	return 1;
++}
++
++__setup("vsdebug=", vs_debug_setup);
++
++
++
++EXPORT_SYMBOL_GPL(vx_debug_switch);
++EXPORT_SYMBOL_GPL(vx_debug_xid);
++EXPORT_SYMBOL_GPL(vx_debug_nid);
++EXPORT_SYMBOL_GPL(vx_debug_net);
++EXPORT_SYMBOL_GPL(vx_debug_limit);
++EXPORT_SYMBOL_GPL(vx_debug_cres);
++EXPORT_SYMBOL_GPL(vx_debug_dlim);
++EXPORT_SYMBOL_GPL(vx_debug_quota);
++EXPORT_SYMBOL_GPL(vx_debug_cvirt);
++EXPORT_SYMBOL_GPL(vx_debug_misc);
++
+Index: linux-2.6.20/kernel/vserver/vci_config.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/kernel/vserver/vci_config.h
+@@ -0,0 +1,80 @@
++
++/*  interface version */
++
++#define VCI_VERSION		0x00020200
++#define VCI_LEGACY_VERSION	0x000100FF
++
++
++enum {
++	VCI_KCBIT_NO_DYNAMIC = 0,
++	VCI_KCBIT_LEGACY = 1,
++	VCI_KCBIT_LEGACYNET = 2,
++	VCI_KCBIT_NGNET = 3,
++
++	VCI_KCBIT_PROC_SECURE = 4,
++	VCI_KCBIT_HARDCPU = 5,
++	VCI_KCBIT_IDLELIMIT = 6,
++	VCI_KCBIT_IDLETIME = 7,
++
++	VCI_KCBIT_COWBL = 8,
++	VCI_KCBIT_FULLCOWBL = 9,
++	VCI_KCBIT_SPACES = 10,
++
++	VCI_KCBIT_LEGACY_VERSION = 15,
++	VCI_KCBIT_DEBUG = 16,
++	VCI_KCBIT_HISTORY = 20,
++	VCI_KCBIT_TAGGED = 24,
++};
++
++
++static inline uint32_t vci_kernel_config(void)
++{
++	return
++	(1 << VCI_KCBIT_NO_DYNAMIC) |
++	(1 << VCI_KCBIT_NGNET) |
++
++	/* configured features */
++#ifdef	CONFIG_VSERVER_PROC_SECURE
++	(1 << VCI_KCBIT_PROC_SECURE) |
++#endif
++#ifdef	CONFIG_VSERVER_HARDCPU
++	(1 << VCI_KCBIT_HARDCPU) |
++#endif
++#ifdef	CONFIG_VSERVER_IDLELIMIT
++	(1 << VCI_KCBIT_IDLELIMIT) |
++#endif
++#ifdef	CONFIG_VSERVER_IDLETIME
++	(1 << VCI_KCBIT_IDLETIME) |
++#endif
++#ifdef	CONFIG_VSERVER_COWBL
++	(1 << VCI_KCBIT_COWBL) |
++	(1 << VCI_KCBIT_FULLCOWBL) |
++#endif
++	(1 << VCI_KCBIT_SPACES) |
++
++	/* debug options */
++#ifdef	CONFIG_VSERVER_DEBUG
++	(1 << VCI_KCBIT_DEBUG) |
++#endif
++#ifdef	CONFIG_VSERVER_HISTORY
++	(1 << VCI_KCBIT_HISTORY) |
++#endif
++	/* inode context tagging */
++#if	defined(CONFIG_TAGGING_NONE)
++	(0 << VCI_KCBIT_TAGGED) |
++#elif	defined(CONFIG_TAGGING_UID16)
++	(1 << VCI_KCBIT_TAGGED) |
++#elif	defined(CONFIG_TAGGING_GID16)
++	(2 << VCI_KCBIT_TAGGED) |
++#elif	defined(CONFIG_TAGGING_ID24)
++	(3 << VCI_KCBIT_TAGGED) |
++#elif	defined(CONFIG_TAGGING_INTERN)
++	(4 << VCI_KCBIT_TAGGED) |
++#elif	defined(CONFIG_TAGGING_RUNTIME)
++	(5 << VCI_KCBIT_TAGGED) |
++#else
++	(7 << VCI_KCBIT_TAGGED) |
++#endif
++	0;
++}
++
+Index: linux-2.6.20/mm/filemap.c
+===================================================================
+--- linux-2.6.20.orig/mm/filemap.c
++++ linux-2.6.20/mm/filemap.c
+@@ -1234,6 +1234,31 @@ int file_send_actor(read_descriptor_t * 
+ 	return written;
+ }
+ 
++/* FIXME: It would be as simple as this, if we had a (void __user*) to write.
++ * We already have a kernel buffer, so it should be even simpler, right? ;)
++ *
++ * Yes, sorta.  After duplicating the complete path of generic_file_write(),
++ * at least some special cases could be removed, so the copy is simpler than
++ * the original.  But it remains a copy, so overall complexity increases.
++ */
++static ssize_t
++generic_kernel_file_write(struct file *, const char *, size_t, loff_t *);
++
++ssize_t generic_file_sendpage(struct file *file, struct page *page,
++		int offset, size_t size, loff_t *ppos, int more)
++{
++	ssize_t ret;
++	char *kaddr;
++
++	kaddr = kmap(page);
++	ret = generic_kernel_file_write(file, kaddr + offset, size, ppos);
++	kunmap(page);
++
++	return ret;
++}
++
++EXPORT_SYMBOL(generic_file_sendpage);
++
+ ssize_t generic_file_sendfile(struct file *in_file, loff_t *ppos,
+ 			 size_t count, read_actor_t actor, void *target)
+ {
+@@ -1911,6 +1936,19 @@ int remove_suid(struct dentry *dentry)
+ }
+ EXPORT_SYMBOL(remove_suid);
+ 
++static inline size_t
++filemap_copy_from_kernel(struct page *page, unsigned long offset,
++			 const char *buf, unsigned bytes)
++{
++	char *kaddr;
++
++	kaddr = kmap(page);
++	memcpy(kaddr + offset, buf, bytes);
++	kunmap(page);
++
++	return bytes;
++}
++
+ size_t
+ __filemap_copy_from_user_iovec_inatomic(char *vaddr,
+ 			const struct iovec *iov, size_t base, size_t bytes)
+@@ -2216,6 +2254,175 @@ zero_length_segment:
+ }
+ EXPORT_SYMBOL(generic_file_buffered_write);
+ 
++static inline void
++filemap_set_next_kvec(const struct kvec **iovp, size_t *basep, size_t bytes)
++{
++	const struct kvec *iov = *iovp;
++	size_t base = *basep;
++
++	while (bytes) {
++		int copy = min(bytes, iov->iov_len - base);
++
++		bytes -= copy;
++		base += copy;
++		if (iov->iov_len == base) {
++			iov++;
++			base = 0;
++		}
++	}
++	*iovp = iov;
++	*basep = base;
++}
++
++/*
++ * TODO:
++ * This largely tries to copy generic_file_aio_write_nolock(), although it
++ * doesn't have to be nearly as generic.  A real cleanup should either
++ * merge this into generic_file_aio_write_nolock() as well or keep it special
++ * and remove as much code as possible.
++ */
++static ssize_t
++generic_kernel_file_aio_write_nolock(struct kiocb *iocb, const struct kvec*iov,
++				     unsigned long nr_segs, loff_t *ppos)
++{
++	struct file *file = iocb->ki_filp;
++	struct address_space * mapping = file->f_mapping;
++	const struct address_space_operations *a_ops = mapping->a_ops;
++	size_t ocount;		/* original count */
++	size_t count;		/* after file limit checks */
++	struct inode	*inode = mapping->host;
++	long		status = 0;
++	loff_t		pos;
++	struct page	*page;
++	struct page	*cached_page = NULL;
++	const int	isblk = S_ISBLK(inode->i_mode);
++	ssize_t		written;
++	ssize_t		err;
++	size_t		bytes;
++	struct pagevec	lru_pvec;
++	const struct kvec *cur_iov = iov; /* current kvec */
++	size_t		iov_base = 0;	   /* offset in the current kvec */
++	unsigned long	seg;
++	char		*buf;
++
++	ocount = 0;
++	for (seg = 0; seg < nr_segs; seg++) {
++		const struct kvec *iv = &iov[seg];
++
++		/*
++		 * If any segment has a negative length, or the cumulative
++		 * length ever wraps negative then return -EINVAL.
++		 */
++		ocount += iv->iov_len;
++		if (unlikely((ssize_t)(ocount|iv->iov_len) < 0))
++			return -EINVAL;
++	}
++
++	count = ocount;
++	pos = *ppos;
++	pagevec_init(&lru_pvec, 0);
++
++	/* We can write back this queue in page reclaim */
++	current->backing_dev_info = mapping->backing_dev_info;
++	written = 0;
++
++	err = generic_write_checks(file, &pos, &count, isblk);
++	if (err)
++		goto out;
++
++
++	if (count == 0)
++		goto out;
++
++	remove_suid(file->f_dentry);
++	file_update_time(file);
++
++	/* There is no sane reason to use O_DIRECT */
++	BUG_ON(file->f_flags & O_DIRECT);
++
++	buf = iov->iov_base;
++	do {
++		unsigned long index;
++		unsigned long offset;
++		size_t copied;
++
++		offset = (pos & (PAGE_CACHE_SIZE -1)); /* Within page */
++		index = pos >> PAGE_CACHE_SHIFT;
++		bytes = PAGE_CACHE_SIZE - offset;
++		if (bytes > count)
++			bytes = count;
++
++		page = __grab_cache_page(mapping,index,&cached_page,&lru_pvec);
++		if (!page) {
++			status = -ENOMEM;
++			break;
++		}
++
++		status = a_ops->prepare_write(file, page, offset, offset+bytes);
++		if (unlikely(status)) {
++			loff_t isize = i_size_read(inode);
++			/*
++			 * prepare_write() may have instantiated a few blocks
++			 * outside i_size.  Trim these off again.
++			 */
++			unlock_page(page);
++			page_cache_release(page);
++			if (pos + bytes > isize)
++				vmtruncate(inode, isize);
++			break;
++		}
++
++		BUG_ON(nr_segs != 1);
++		copied = filemap_copy_from_kernel(page, offset, buf, bytes);
++
++		flush_dcache_page(page);
++		status = a_ops->commit_write(file, page, offset, offset+bytes);
++		if (likely(copied > 0)) {
++			if (!status)
++				status = copied;
++
++			if (status >= 0) {
++				written += status;
++				count -= status;
++				pos += status;
++				buf += status;
++				if (unlikely(nr_segs > 1))
++					filemap_set_next_kvec(&cur_iov,
++							&iov_base, status);
++			}
++		}
++		if (unlikely(copied != bytes))
++			if (status >= 0)
++				status = -EFAULT;
++		unlock_page(page);
++		mark_page_accessed(page);
++		page_cache_release(page);
++		if (status < 0)
++			break;
++		balance_dirty_pages_ratelimited(mapping);
++		cond_resched();
++	} while (count);
++	*ppos = pos;
++
++	if (cached_page)
++		page_cache_release(cached_page);
++
++	/*
++	 * For now, when the user asks for O_SYNC, we'll actually give O_DSYNC
++	 */
++	if (status >= 0) {
++		if ((file->f_flags & O_SYNC) || IS_SYNC(inode))
++			status = generic_osync_inode(inode, mapping,
++					OSYNC_METADATA|OSYNC_DATA);
++	}
++
++	err = written ? written : status;
++out:
++	pagevec_lru_add(&lru_pvec);
++	current->backing_dev_info = 0;
++	return err;
++}
++
+ static ssize_t
+ __generic_file_aio_write_nolock(struct kiocb *iocb, const struct iovec *iov,
+ 				unsigned long nr_segs, loff_t *ppos)
+@@ -2332,6 +2539,36 @@ out:
+ 	return written ? written : err;
+ }
+ 
++static ssize_t
++generic_kernel_file_write_nolock(struct file *file, const struct kvec *iov,
++				 unsigned long nr_segs, loff_t *ppos)
++{
++	struct kiocb kiocb;
++	ssize_t ret;
++
++	init_sync_kiocb(&kiocb, file);
++	ret = generic_kernel_file_aio_write_nolock(&kiocb, iov, nr_segs, ppos);
++	if (ret == -EIOCBQUEUED)
++		ret = wait_on_sync_kiocb(&kiocb);
++	return ret;
++}
++
++static ssize_t generic_kernel_file_write(struct file *file, const char *buf,
++					 size_t count, loff_t *ppos)
++{
++	struct inode    *inode = file->f_mapping->host;
++	ssize_t         err;
++	struct kvec local_iov = { .iov_base = (char *) buf,
++				  .iov_len = count };
++
++	mutex_lock(&inode->i_mutex);
++	err = generic_kernel_file_write_nolock(file, &local_iov, 1, ppos);
++	mutex_unlock(&inode->i_mutex);
++
++	return err;
++}
++
++
+ ssize_t generic_file_aio_write_nolock(struct kiocb *iocb,
+ 		const struct iovec *iov, unsigned long nr_segs, loff_t pos)
+ {
+Index: linux-2.6.20/mm/filemap_xip.c
+===================================================================
+--- linux-2.6.20.orig/mm/filemap_xip.c
++++ linux-2.6.20/mm/filemap_xip.c
+@@ -13,6 +13,7 @@
+ #include <linux/module.h>
+ #include <linux/uio.h>
+ #include <linux/rmap.h>
++#include <linux/vs_memory.h>
+ #include <asm/tlbflush.h>
+ #include "filemap.h"
+ 
+Index: linux-2.6.20/mm/fremap.c
+===================================================================
+--- linux-2.6.20.orig/mm/fremap.c
++++ linux-2.6.20/mm/fremap.c
+@@ -15,6 +15,7 @@
+ #include <linux/rmap.h>
+ #include <linux/module.h>
+ #include <linux/syscalls.h>
++#include <linux/vs_memory.h>
+ 
+ #include <asm/mmu_context.h>
+ #include <asm/cacheflush.h>
+@@ -74,6 +75,8 @@ int install_page(struct mm_struct *mm, s
+ 	err = -ENOMEM;
+ 	if (page_mapcount(page) > INT_MAX/2)
+ 		goto unlock;
++	if (!vx_rss_avail(mm, 1))
++		goto unlock;
+ 
+ 	if (pte_none(*pte) || !zap_pte(mm, vma, addr, pte))
+ 		inc_mm_counter(mm, file_rss);
+Index: linux-2.6.20/mm/hugetlb.c
+===================================================================
+--- linux-2.6.20.orig/mm/hugetlb.c
++++ linux-2.6.20/mm/hugetlb.c
+@@ -19,6 +19,7 @@
+ #include <asm/pgtable.h>
+ 
+ #include <linux/hugetlb.h>
++#include <linux/vs_memory.h>
+ #include "internal.h"
+ 
+ const unsigned long hugetlb_zero = 0, hugetlb_infinity = ~0UL;
+Index: linux-2.6.20/mm/memory.c
+===================================================================
+--- linux-2.6.20.orig/mm/memory.c
++++ linux-2.6.20/mm/memory.c
+@@ -498,6 +498,9 @@ static int copy_pte_range(struct mm_stru
+ 	int progress = 0;
+ 	int rss[2];
+ 
++	if (!vx_rss_avail(dst_mm, ((end - addr)/PAGE_SIZE + 1)))
++		return -ENOMEM;
++
+ again:
+ 	rss[1] = rss[0] = 0;
+ 	dst_pte = pte_alloc_map_lock(dst_mm, dst_pmd, addr, &dst_ptl);
+@@ -2021,6 +2024,11 @@ static int do_swap_page(struct mm_struct
+ 		count_vm_event(PGMAJFAULT);
+ 	}
+ 
++	if (!vx_rss_avail(mm, 1)) {
++		ret = VM_FAULT_OOM;
++		goto out;
++	}
++
+ 	delayacct_clear_flag(DELAYACCT_PF_SWAPIN);
+ 	mark_page_accessed(page);
+ 	lock_page(page);
+@@ -2093,6 +2101,8 @@ static int do_anonymous_page(struct mm_s
+ 		/* Allocate our own private page. */
+ 		pte_unmap(page_table);
+ 
++		if (!vx_rss_avail(mm, 1))
++			goto oom;
+ 		if (unlikely(anon_vma_prepare(vma)))
+ 			goto oom;
+ 		page = alloc_zeroed_user_highpage(vma, address);
+@@ -2166,6 +2176,9 @@ static int do_no_page(struct mm_struct *
+ 	pte_unmap(page_table);
+ 	BUG_ON(vma->vm_flags & VM_PFNMAP);
+ 
++	if (!vx_rss_avail(mm, 1))
++		return VM_FAULT_OOM;
++
+ 	if (vma->vm_file) {
+ 		mapping = vma->vm_file->f_mapping;
+ 		sequence = mapping->truncate_count;
+@@ -2390,6 +2403,7 @@ static inline int handle_pte_fault(struc
+ 	pte_t entry;
+ 	pte_t old_entry;
+ 	spinlock_t *ptl;
++	int ret, type = VXPT_UNKNOWN;
+ 
+ 	old_entry = entry = *pte;
+ 	if (!pte_present(entry)) {
+@@ -2418,9 +2432,12 @@ static inline int handle_pte_fault(struc
+ 	if (unlikely(!pte_same(*pte, entry)))
+ 		goto unlock;
+ 	if (write_access) {
+-		if (!pte_write(entry))
+-			return do_wp_page(mm, vma, address,
++		if (!pte_write(entry)) {
++			ret = do_wp_page(mm, vma, address,
+ 					pte, pmd, ptl, entry);
++			type = VXPT_WRITE;
++			goto out;
++		}
+ 		entry = pte_mkdirty(entry);
+ 	}
+ 	entry = pte_mkyoung(entry);
+@@ -2440,7 +2457,10 @@ static inline int handle_pte_fault(struc
+ 	}
+ unlock:
+ 	pte_unmap_unlock(pte, ptl);
+-	return VM_FAULT_MINOR;
++	ret = VM_FAULT_MINOR;
++out:
++	vx_page_fault(mm, vma, type, ret);
++	return ret;
+ }
+ 
+ /*
+Index: linux-2.6.20/mm/mlock.c
+===================================================================
+--- linux-2.6.20.orig/mm/mlock.c
++++ linux-2.6.20/mm/mlock.c
+@@ -10,6 +10,7 @@
+ #include <linux/mm.h>
+ #include <linux/mempolicy.h>
+ #include <linux/syscalls.h>
++#include <linux/vs_memory.h>
+ 
+ 
+ static int mlock_fixup(struct vm_area_struct *vma, struct vm_area_struct **prev,
+@@ -65,7 +66,7 @@ success:
+ 			ret = make_pages_present(start, end);
+ 	}
+ 
+-	mm->locked_vm -= pages;
++	vx_vmlocked_sub(mm, pages);
+ out:
+ 	if (ret == -ENOMEM)
+ 		ret = -EAGAIN;
+@@ -123,7 +124,7 @@ static int do_mlock(unsigned long start,
+ 
+ asmlinkage long sys_mlock(unsigned long start, size_t len)
+ {
+-	unsigned long locked;
++	unsigned long locked, grow;
+ 	unsigned long lock_limit;
+ 	int error = -ENOMEM;
+ 
+@@ -134,8 +135,10 @@ asmlinkage long sys_mlock(unsigned long 
+ 	len = PAGE_ALIGN(len + (start & ~PAGE_MASK));
+ 	start &= PAGE_MASK;
+ 
+-	locked = len >> PAGE_SHIFT;
+-	locked += current->mm->locked_vm;
++	grow = len >> PAGE_SHIFT;
++	if (!vx_vmlocked_avail(current->mm, grow))
++		goto out;
++	locked = current->mm->locked_vm + grow;
+ 
+ 	lock_limit = current->signal->rlim[RLIMIT_MEMLOCK].rlim_cur;
+ 	lock_limit >>= PAGE_SHIFT;
+@@ -143,6 +146,7 @@ asmlinkage long sys_mlock(unsigned long 
+ 	/* check against resource limits */
+ 	if ((locked <= lock_limit) || capable(CAP_IPC_LOCK))
+ 		error = do_mlock(start, len, 1);
++out:
+ 	up_write(&current->mm->mmap_sem);
+ 	return error;
+ }
+@@ -202,6 +206,8 @@ asmlinkage long sys_mlockall(int flags)
+ 	lock_limit >>= PAGE_SHIFT;
+ 
+ 	ret = -ENOMEM;
++	if (!vx_vmlocked_avail(current->mm, current->mm->total_vm))
++		goto out;
+ 	if (!(flags & MCL_CURRENT) || (current->mm->total_vm <= lock_limit) ||
+ 	    capable(CAP_IPC_LOCK))
+ 		ret = do_mlockall(flags);
+Index: linux-2.6.20/mm/mmap.c
+===================================================================
+--- linux-2.6.20.orig/mm/mmap.c
++++ linux-2.6.20/mm/mmap.c
+@@ -1141,10 +1141,10 @@ munmap_back:
+ 		kmem_cache_free(vm_area_cachep, vma);
+ 	}
+ out:	
+-	mm->total_vm += len >> PAGE_SHIFT;
++	vx_vmpages_add(mm, len >> PAGE_SHIFT);
+ 	vm_stat_account(mm, vm_flags, file, len >> PAGE_SHIFT);
+ 	if (vm_flags & VM_LOCKED) {
+-		mm->locked_vm += len >> PAGE_SHIFT;
++		vx_vmlocked_add(mm, len >> PAGE_SHIFT);
+ 		make_pages_present(addr, addr + len);
+ 	}
+ 	if (flags & MAP_POPULATE) {
+@@ -1511,9 +1511,9 @@ static int acct_stack_growth(struct vm_a
+ 		return -ENOMEM;
+ 
+ 	/* Ok, everything looks good - let it rip */
+-	mm->total_vm += grow;
++	vx_vmpages_add(mm, grow);
+ 	if (vma->vm_flags & VM_LOCKED)
+-		mm->locked_vm += grow;
++		vx_vmlocked_add(mm, grow);
+ 	vm_stat_account(mm, vma->vm_flags, vma->vm_file, grow);
+ 	return 0;
+ }
+@@ -1666,9 +1666,9 @@ static void remove_vma_list(struct mm_st
+ 	do {
+ 		long nrpages = vma_pages(vma);
+ 
+-		mm->total_vm -= nrpages;
++		vx_vmpages_sub(mm, nrpages);
+ 		if (vma->vm_flags & VM_LOCKED)
+-			mm->locked_vm -= nrpages;
++			vx_vmlocked_sub(mm, nrpages);
+ 		vm_stat_account(mm, vma->vm_flags, vma->vm_file, -nrpages);
+ 		vma = remove_vma(vma);
+ 	} while (vma);
+@@ -1907,6 +1907,8 @@ unsigned long do_brk(unsigned long addr,
+ 		lock_limit >>= PAGE_SHIFT;
+ 		if (locked > lock_limit && !capable(CAP_IPC_LOCK))
+ 			return -EAGAIN;
++		if (!vx_vmlocked_avail(mm, len >> PAGE_SHIFT))
++			return -ENOMEM;
+ 	}
+ 
+ 	/*
+@@ -1933,7 +1935,8 @@ unsigned long do_brk(unsigned long addr,
+ 	if (mm->map_count > sysctl_max_map_count)
+ 		return -ENOMEM;
+ 
+-	if (security_vm_enough_memory(len >> PAGE_SHIFT))
++	if (security_vm_enough_memory(len >> PAGE_SHIFT) ||
++		!vx_vmpages_avail(mm, len >> PAGE_SHIFT))
+ 		return -ENOMEM;
+ 
+ 	/* Can we just expand an old private anonymous mapping? */
+@@ -1959,9 +1962,9 @@ unsigned long do_brk(unsigned long addr,
+ 				(VM_READ|VM_WRITE|VM_EXEC|VM_SHARED)];
+ 	vma_link(mm, vma, prev, rb_link, rb_parent);
+ out:
+-	mm->total_vm += len >> PAGE_SHIFT;
++	vx_vmpages_add(mm, len >> PAGE_SHIFT);
+ 	if (flags & VM_LOCKED) {
+-		mm->locked_vm += len >> PAGE_SHIFT;
++		vx_vmlocked_add(mm, len >> PAGE_SHIFT);
+ 		make_pages_present(addr, addr + len);
+ 	}
+ 	return addr;
+@@ -1987,6 +1990,11 @@ void exit_mmap(struct mm_struct *mm)
+ 	free_pgtables(&tlb, vma, FIRST_USER_ADDRESS, 0);
+ 	tlb_finish_mmu(tlb, 0, end);
+ 
++	set_mm_counter(mm, file_rss, 0);
++	set_mm_counter(mm, anon_rss, 0);
++	vx_vmpages_sub(mm, mm->total_vm);
++	vx_vmlocked_sub(mm, mm->locked_vm);
++
+ 	/*
+ 	 * Walk the list again, actually closing and freeing it,
+ 	 * with preemption enabled, without holding any MM locks.
+@@ -2026,7 +2034,8 @@ int insert_vm_struct(struct mm_struct * 
+ 	if (__vma && __vma->vm_start < vma->vm_end)
+ 		return -ENOMEM;
+ 	if ((vma->vm_flags & VM_ACCOUNT) &&
+-	     security_vm_enough_memory(vma_pages(vma)))
++		(security_vm_enough_memory(vma_pages(vma)) ||
++		!vx_vmpages_avail(mm, vma_pages(vma))))
+ 		return -ENOMEM;
+ 	vma_link(mm, vma, prev, rb_link, rb_parent);
+ 	return 0;
+@@ -2100,5 +2109,7 @@ int may_expand_vm(struct mm_struct *mm, 
+ 
+ 	if (cur + npages > lim)
+ 		return 0;
++	if (!vx_vmpages_avail(mm, npages))
++		return 0;
+ 	return 1;
+ }
+Index: linux-2.6.20/mm/mremap.c
+===================================================================
+--- linux-2.6.20.orig/mm/mremap.c
++++ linux-2.6.20/mm/mremap.c
+@@ -18,6 +18,7 @@
+ #include <linux/highmem.h>
+ #include <linux/security.h>
+ #include <linux/syscalls.h>
++#include <linux/vs_memory.h>
+ 
+ #include <asm/uaccess.h>
+ #include <asm/cacheflush.h>
+@@ -212,7 +213,7 @@ static unsigned long move_vma(struct vm_
+ 	 * If this were a serious issue, we'd add a flag to do_munmap().
+ 	 */
+ 	hiwater_vm = mm->hiwater_vm;
+-	mm->total_vm += new_len >> PAGE_SHIFT;
++	vx_vmpages_add(mm, new_len >> PAGE_SHIFT);
+ 	vm_stat_account(mm, vma->vm_flags, vma->vm_file, new_len>>PAGE_SHIFT);
+ 
+ 	if (do_munmap(mm, old_addr, old_len) < 0) {
+@@ -230,7 +231,7 @@ static unsigned long move_vma(struct vm_
+ 	}
+ 
+ 	if (vm_flags & VM_LOCKED) {
+-		mm->locked_vm += new_len >> PAGE_SHIFT;
++		vx_vmlocked_add(mm, new_len >> PAGE_SHIFT);
+ 		if (new_len > old_len)
+ 			make_pages_present(new_addr + old_len,
+ 					   new_addr + new_len);
+@@ -337,6 +338,9 @@ unsigned long do_mremap(unsigned long ad
+ 		ret = -EAGAIN;
+ 		if (locked > lock_limit && !capable(CAP_IPC_LOCK))
+ 			goto out;
++		if (!vx_vmlocked_avail(current->mm,
++			(new_len - old_len) >> PAGE_SHIFT))
++			goto out;
+ 	}
+ 	if (!may_expand_vm(mm, (new_len - old_len) >> PAGE_SHIFT)) {
+ 		ret = -ENOMEM;
+@@ -365,10 +369,10 @@ unsigned long do_mremap(unsigned long ad
+ 			vma_adjust(vma, vma->vm_start,
+ 				addr + new_len, vma->vm_pgoff, NULL);
+ 
+-			mm->total_vm += pages;
++			vx_vmpages_add(mm, pages);
+ 			vm_stat_account(mm, vma->vm_flags, vma->vm_file, pages);
+ 			if (vma->vm_flags & VM_LOCKED) {
+-				mm->locked_vm += pages;
++				vx_vmlocked_add(mm, pages);
+ 				make_pages_present(addr + old_len,
+ 						   addr + new_len);
+ 			}
+Index: linux-2.6.20/mm/nommu.c
+===================================================================
+--- linux-2.6.20.orig/mm/nommu.c
++++ linux-2.6.20/mm/nommu.c
+@@ -921,7 +921,7 @@ unsigned long do_mmap_pgoff(struct file 
+ 	realalloc += kobjsize(vma);
+ 	askedalloc += sizeof(*vma);
+ 
+-	current->mm->total_vm += len >> PAGE_SHIFT;
++	vx_vmpages_add(current->mm, len >> PAGE_SHIFT);
+ 
+ 	add_nommu_vma(vma);
+ 
+@@ -1046,7 +1046,7 @@ int do_munmap(struct mm_struct *mm, unsi
+ 	kfree(vml);
+ 
+ 	update_hiwater_vm(mm);
+-	mm->total_vm -= len >> PAGE_SHIFT;
++	vx_vmpages_sub(mm, len >> PAGE_SHIFT);
+ 
+ #ifdef DEBUG
+ 	show_process_blocks();
+@@ -1078,7 +1078,7 @@ void exit_mmap(struct mm_struct * mm)
+ 		printk("Exit_mmap:\n");
+ #endif
+ 
+-		mm->total_vm = 0;
++		vx_vmpages_sub(mm, mm->total_vm);
+ 
+ 		while ((tmp = mm->context.vmlist)) {
+ 			mm->context.vmlist = tmp->next;
+Index: linux-2.6.20/mm/oom_kill.c
+===================================================================
+--- linux-2.6.20.orig/mm/oom_kill.c
++++ linux-2.6.20/mm/oom_kill.c
+@@ -24,6 +24,7 @@
+ #include <linux/cpuset.h>
+ #include <linux/module.h>
+ #include <linux/notifier.h>
++#include <linux/vs_memory.h>
+ 
+ int sysctl_panic_on_oom;
+ /* #define DEBUG */
+@@ -66,6 +67,12 @@ unsigned long badness(struct task_struct
+ 	points = mm->total_vm;
+ 
+ 	/*
++	 * add points for context badness
++	 */
++
++	points += vx_badness(p, mm);
++
++	/*
+ 	 * After this unlock we can no longer dereference local variable `mm'
+ 	 */
+ 	task_unlock(p);
+@@ -154,8 +161,8 @@ unsigned long badness(struct task_struct
+ 	}
+ 
+ #ifdef DEBUG
+-	printk(KERN_DEBUG "OOMkill: task %d (%s) got %d points\n",
+-	p->pid, p->comm, points);
++	printk(KERN_DEBUG "OOMkill: task %d:#%u (%s) got %d points\n",
++		p->pid, p->xid, p->comm, points);
+ #endif
+ 	return points;
+ }
+@@ -284,7 +291,8 @@ static void __oom_kill_task(struct task_
+ 	}
+ 
+ 	if (verbose)
+-		printk(KERN_ERR "Killed process %d (%s)\n", p->pid, p->comm);
++		printk(KERN_ERR "Killed process %d:#%u (%s)\n",
++				p->pid, p->xid, p->comm);
+ 
+ 	/*
+ 	 * We give our sacrificial lamb high priority and access to
+@@ -354,8 +362,8 @@ static int oom_kill_process(struct task_
+ 		return 0;
+ 	}
+ 
+-	printk(KERN_ERR "%s: kill process %d (%s) score %li or a child\n",
+-					message, p->pid, p->comm, points);
++	printk(KERN_ERR "%s: kill process %d:#%u (%s) score %li or a child\n",
++				message, p->pid, p->xid, p->comm, points);
+ 
+ 	/* Try to kill a child first */
+ 	list_for_each(tsk, &p->children) {
+Index: linux-2.6.20/mm/page_alloc.c
+===================================================================
+--- linux-2.6.20.orig/mm/page_alloc.c
++++ linux-2.6.20/mm/page_alloc.c
+@@ -41,6 +41,8 @@
+ #include <linux/pfn.h>
+ #include <linux/backing-dev.h>
+ #include <linux/fault-inject.h>
++#include <linux/vs_base.h>
++#include <linux/vs_limit.h>
+ 
+ #include <asm/tlbflush.h>
+ #include <asm/div64.h>
+@@ -1519,6 +1521,9 @@ void si_meminfo(struct sysinfo *val)
+ 	val->totalhigh = totalhigh_pages;
+ 	val->freehigh = nr_free_highpages();
+ 	val->mem_unit = PAGE_SIZE;
++
++	if (vx_flags(VXF_VIRT_MEM, 0))
++		vx_vsi_meminfo(val);
+ }
+ 
+ EXPORT_SYMBOL(si_meminfo);
+@@ -1538,6 +1543,9 @@ void si_meminfo_node(struct sysinfo *val
+ 	val->freehigh = 0;
+ #endif
+ 	val->mem_unit = PAGE_SIZE;
++
++	if (vx_flags(VXF_VIRT_MEM, 0))
++		vx_vsi_meminfo(val);
+ }
+ #endif
+ 
+Index: linux-2.6.20/mm/rmap.c
+===================================================================
+--- linux-2.6.20.orig/mm/rmap.c
++++ linux-2.6.20/mm/rmap.c
+@@ -48,6 +48,7 @@
+ #include <linux/rcupdate.h>
+ #include <linux/module.h>
+ #include <linux/kallsyms.h>
++#include <linux/vs_memory.h>
+ 
+ #include <asm/tlbflush.h>
+ 
+Index: linux-2.6.20/mm/shmem.c
+===================================================================
+--- linux-2.6.20.orig/mm/shmem.c
++++ linux-2.6.20/mm/shmem.c
+@@ -55,7 +55,6 @@
+ #include <asm/pgtable.h>
+ 
+ /* This magic number is used in glibc for posix shared memory */
+-#define TMPFS_MAGIC	0x01021994
+ 
+ #define ENTRIES_PER_PAGE (PAGE_CACHE_SIZE/sizeof(unsigned long))
+ #define ENTRIES_PER_PAGEPAGE (ENTRIES_PER_PAGE*ENTRIES_PER_PAGE)
+@@ -1663,7 +1662,7 @@ static int shmem_statfs(struct dentry *d
+ {
+ 	struct shmem_sb_info *sbinfo = SHMEM_SB(dentry->d_sb);
+ 
+-	buf->f_type = TMPFS_MAGIC;
++	buf->f_type = TMPFS_SUPER_MAGIC;
+ 	buf->f_bsize = PAGE_CACHE_SIZE;
+ 	buf->f_namelen = NAME_MAX;
+ 	spin_lock(&sbinfo->stat_lock);
+@@ -2237,7 +2236,7 @@ static int shmem_fill_super(struct super
+ 	sb->s_maxbytes = SHMEM_MAX_BYTES;
+ 	sb->s_blocksize = PAGE_CACHE_SIZE;
+ 	sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
+-	sb->s_magic = TMPFS_MAGIC;
++	sb->s_magic = TMPFS_SUPER_MAGIC;
+ 	sb->s_op = &shmem_ops;
+ 	sb->s_time_gran = 1;
+ #ifdef CONFIG_TMPFS_POSIX_ACL
+Index: linux-2.6.20/mm/slab.c
+===================================================================
+--- linux-2.6.20.orig/mm/slab.c
++++ linux-2.6.20/mm/slab.c
+@@ -502,6 +502,8 @@ struct kmem_cache {
+ #define STATS_INC_FREEMISS(x)	do { } while (0)
+ #endif
+ 
++#include "slab_vs.h"
++
+ #if DEBUG
+ 
+ /*
+@@ -3219,6 +3221,8 @@ static __always_inline void *__cache_all
+ 	 */
+  	if (NUMA_BUILD && !objp)
+  		objp = ____cache_alloc_node(cachep, flags, numa_node_id());
++
++	vx_slab_alloc(cachep, flags);
+ 	local_irq_restore(save_flags);
+ 	objp = cache_alloc_debugcheck_after(cachep, flags, objp,
+ 					    caller);
+@@ -3356,6 +3360,7 @@ retry:
+ 
+ 	obj = slab_get_obj(cachep, slabp, nodeid);
+ 	check_slabp(cachep, slabp);
++	vx_slab_alloc(cachep, flags);
+ 	l3->free_objects--;
+ 	/* move slabp to correct slabp list: */
+ 	list_del(&slabp->list);
+@@ -3493,6 +3498,7 @@ static inline void __cache_free(struct k
+ 
+ 	check_irq_off();
+ 	objp = cache_free_debugcheck(cachep, objp, __builtin_return_address(0));
++	vx_slab_free(cachep);
+ 
+ 	if (cache_free_alien(cachep, objp))
+ 		return;
+Index: linux-2.6.20/mm/slab_vs.h
+===================================================================
+--- /dev/null
++++ linux-2.6.20/mm/slab_vs.h
+@@ -0,0 +1,27 @@
++
++#include <linux/vserver/context.h>
++
++#include <linux/vs_context.h>
++
++static inline
++void vx_slab_alloc(struct kmem_cache *cachep, gfp_t flags)
++{
++	int what = gfp_zone(cachep->gfpflags);
++
++	if (!current->vx_info)
++		return;
++
++	atomic_add(cachep->buffer_size, &current->vx_info->cacct.slab[what]);
++}
++
++static inline
++void vx_slab_free(struct kmem_cache *cachep)
++{
++	int what = gfp_zone(cachep->gfpflags);
++
++	if (!current->vx_info)
++		return;
++
++	atomic_sub(cachep->buffer_size, &current->vx_info->cacct.slab[what]);
++}
++
+Index: linux-2.6.20/mm/swapfile.c
+===================================================================
+--- linux-2.6.20.orig/mm/swapfile.c
++++ linux-2.6.20/mm/swapfile.c
+@@ -31,6 +31,8 @@
+ #include <asm/pgtable.h>
+ #include <asm/tlbflush.h>
+ #include <linux/swapops.h>
++#include <linux/vs_base.h>
++#include <linux/vs_memory.h>
+ 
+ DEFINE_SPINLOCK(swap_lock);
+ unsigned int nr_swapfiles;
+@@ -1715,6 +1717,8 @@ void si_swapinfo(struct sysinfo *val)
+ 	val->freeswap = nr_swap_pages + nr_to_be_unused;
+ 	val->totalswap = total_swap_pages + nr_to_be_unused;
+ 	spin_unlock(&swap_lock);
++	if (vx_flags(VXF_VIRT_MEM, 0))
++		vx_vsi_swapinfo(val);
+ }
+ 
+ /*
+Index: linux-2.6.20/net/core/dev.c
+===================================================================
+--- linux-2.6.20.orig/net/core/dev.c
++++ linux-2.6.20/net/core/dev.c
+@@ -116,6 +116,7 @@
+ #include <linux/dmaengine.h>
+ #include <linux/err.h>
+ #include <linux/ctype.h>
++#include <linux/vs_inet.h>
+ 
+ /*
+  *	The list of packet types we will receive (as opposed to discard)
+@@ -2048,6 +2049,8 @@ static int dev_ifconf(char __user *arg)
+ 
+ 	total = 0;
+ 	for (dev = dev_base; dev; dev = dev->next) {
++		if (!nx_dev_visible(current->nx_info, dev))
++			continue;
+ 		for (i = 0; i < NPROTO; i++) {
+ 			if (gifconf_list[i]) {
+ 				int done;
+@@ -2108,6 +2111,8 @@ void dev_seq_stop(struct seq_file *seq, 
+ 
+ static void dev_seq_printf_stats(struct seq_file *seq, struct net_device *dev)
+ {
++	if (!nx_dev_visible(current->nx_info, dev))
++		return;
+ 	if (dev->get_stats) {
+ 		struct net_device_stats *stats = dev->get_stats(dev);
+ 
+Index: linux-2.6.20/net/core/rtnetlink.c
+===================================================================
+--- linux-2.6.20.orig/net/core/rtnetlink.c
++++ linux-2.6.20/net/core/rtnetlink.c
+@@ -397,6 +397,8 @@ static int rtnl_dump_ifinfo(struct sk_bu
+ 	for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) {
+ 		if (idx < s_idx)
+ 			continue;
++		if (!nx_dev_visible(skb->sk->sk_nx_info, dev))
++			continue;
+ 		if (rtnl_fill_ifinfo(skb, dev, NULL, 0, RTM_NEWLINK,
+ 				     NETLINK_CB(cb->skb).pid,
+ 				     cb->nlh->nlmsg_seq, 0, NLM_F_MULTI) <= 0)
+@@ -673,6 +675,9 @@ void rtmsg_ifinfo(int type, struct net_d
+ 	struct sk_buff *skb;
+ 	int err = -ENOBUFS;
+ 
++	if (!nx_dev_visible(current->nx_info, dev))
++		return;
++
+ 	skb = nlmsg_new(if_nlmsg_size(0), GFP_KERNEL);
+ 	if (skb == NULL)
+ 		goto errout;
+Index: linux-2.6.20/net/core/sock.c
+===================================================================
+--- linux-2.6.20.orig/net/core/sock.c
++++ linux-2.6.20/net/core/sock.c
+@@ -125,6 +125,9 @@
+ #include <linux/ipsec.h>
+ 
+ #include <linux/filter.h>
++#include <linux/vs_socket.h>
++#include <linux/vs_limit.h>
++#include <linux/vs_context.h>
+ 
+ #ifdef CONFIG_INET
+ #include <net/tcp.h>
+@@ -790,6 +793,9 @@ int sock_getsockopt(struct socket *sock,
+ 		case SO_PEERSEC:
+ 			return security_socket_getpeersec_stream(sock, optval, optlen, len);
+ 
++		case SO_PEERTAG:
++			return vx_socket_peer_tag(sock, level, optval, optlen, len);
++
+ 		default:
+ 			return(-ENOPROTOOPT);
+ 	}
+@@ -846,6 +852,8 @@ struct sock *sk_alloc(int family, gfp_t 
+ 			sk->sk_prot = sk->sk_prot_creator = prot;
+ 			sock_lock_init(sk);
+ 		}
++		sock_vx_init(sk);
++		sock_nx_init(sk);
+ 		
+ 		if (security_sk_alloc(sk, family, priority))
+ 			goto out_free;
+@@ -884,6 +892,11 @@ void sk_free(struct sock *sk)
+ 		       __FUNCTION__, atomic_read(&sk->sk_omem_alloc));
+ 
+ 	security_sk_free(sk);
++	vx_sock_dec(sk);
++	clr_vx_info(&sk->sk_vx_info);
++	sk->sk_xid = -1;
++	clr_nx_info(&sk->sk_nx_info);
++	sk->sk_nid = -1;
+ 	if (sk->sk_prot_creator->slab != NULL)
+ 		kmem_cache_free(sk->sk_prot_creator->slab, sk);
+ 	else
+@@ -901,6 +914,8 @@ struct sock *sk_clone(const struct sock 
+ 		sock_copy(newsk, sk);
+ 
+ 		/* SANITY */
++		sock_vx_init(newsk);
++		sock_nx_init(newsk);
+ 		sk_node_init(&newsk->sk_node);
+ 		sock_lock_init(newsk);
+ 		bh_lock_sock(newsk);
+@@ -946,6 +961,12 @@ struct sock *sk_clone(const struct sock 
+ 		newsk->sk_priority = 0;
+ 		atomic_set(&newsk->sk_refcnt, 2);
+ 
++		set_vx_info(&newsk->sk_vx_info, sk->sk_vx_info);
++		newsk->sk_xid = sk->sk_xid;
++		vx_sock_inc(newsk);
++		set_nx_info(&newsk->sk_nx_info, sk->sk_nx_info);
++		newsk->sk_nid = sk->sk_nid;
++
+ 		/*
+ 		 * Increment the counter in the same struct proto as the master
+ 		 * sock (sk_refcnt_debug_inc uses newsk->sk_prot->socks, that
+@@ -1515,6 +1536,11 @@ void sock_init_data(struct socket *sock,
+ 	sk->sk_stamp.tv_sec     = -1L;
+ 	sk->sk_stamp.tv_usec    = -1L;
+ 
++	set_vx_info(&sk->sk_vx_info, current->vx_info);
++	sk->sk_xid = vx_current_xid();
++	vx_sock_inc(sk);
++	set_nx_info(&sk->sk_nx_info, current->nx_info);
++	sk->sk_nid = nx_current_nid();
+ 	atomic_set(&sk->sk_refcnt, 1);
+ }
+ 
+Index: linux-2.6.20/net/ipv4/af_inet.c
+===================================================================
+--- linux-2.6.20.orig/net/ipv4/af_inet.c
++++ linux-2.6.20/net/ipv4/af_inet.c
+@@ -115,6 +115,7 @@
+ #ifdef CONFIG_IP_MROUTE
+ #include <linux/mroute.h>
+ #endif
++#include <linux/vs_limit.h>
+ 
+ DEFINE_SNMP_STAT(struct linux_mib, net_statistics) __read_mostly;
+ 
+@@ -283,9 +284,11 @@ lookup_protocol:
+ 	}
+ 
+ 	err = -EPERM;
++	if ((protocol == IPPROTO_ICMP) && vx_ccaps(VXC_RAW_ICMP))
++		goto override;
+ 	if (answer->capability > 0 && !capable(answer->capability))
+ 		goto out_rcu_unlock;
+-
++override:
+ 	sock->ops = answer->ops;
+ 	answer_prot = answer->prot;
+ 	answer_no_check = answer->no_check;
+@@ -402,6 +405,10 @@ int inet_bind(struct socket *sock, struc
+ 	unsigned short snum;
+ 	int chk_addr_ret;
+ 	int err;
++	__u32 s_addr;	/* Address used for validation */
++	__u32 s_addr1;	/* Address used for socket */
++	__u32 s_addr2;	/* Broadcast address for the socket */
++	struct nx_info *nxi = sk->sk_nx_info;
+ 
+ 	/* If the socket has its own bind function then use it. (RAW) */
+ 	if (sk->sk_prot->bind) {
+@@ -412,7 +419,40 @@ int inet_bind(struct socket *sock, struc
+ 	if (addr_len < sizeof(struct sockaddr_in))
+ 		goto out;
+ 
+-	chk_addr_ret = inet_addr_type(addr->sin_addr.s_addr);
++	s_addr = addr->sin_addr.s_addr;
++	s_addr1 = s_addr;
++	s_addr2 = 0xffffffffl;
++
++	vxdprintk(VXD_CBIT(net, 3),
++		"inet_bind(%p)* %p,%p;%lx %d.%d.%d.%d",
++		sk, sk->sk_nx_info, sk->sk_socket,
++		(sk->sk_socket?sk->sk_socket->flags:0),
++		VXD_QUAD(s_addr));
++	if (nxi) {
++		__u32 v4_bcast = nxi->v4_bcast;
++		__u32 ipv4root = nxi->ipv4[0];
++		int nbipv4 = nxi->nbipv4;
++
++		if (s_addr == 0) {
++			/* bind to any for 1-n */
++			s_addr = ipv4root;
++			s_addr1 = (nbipv4 > 1) ? 0 : s_addr;
++			s_addr2 = v4_bcast;
++		} else if (s_addr == IPI_LOOPBACK) {
++			/* rewrite localhost to ipv4root */
++			s_addr = ipv4root;
++			s_addr1 = ipv4root;
++		} else if (s_addr != v4_bcast) {
++			/* normal address bind */
++			if (!addr_in_nx_info(nxi, s_addr))
++				return -EADDRNOTAVAIL;
++		}
++	}
++	chk_addr_ret = inet_addr_type(s_addr);
++
++	vxdprintk(VXD_CBIT(net, 3),
++		"inet_bind(%p) %d.%d.%d.%d, %d.%d.%d.%d, %d.%d.%d.%d",
++		sk, VXD_QUAD(s_addr), VXD_QUAD(s_addr1), VXD_QUAD(s_addr2));
+ 
+ 	/* Not specified by any standard per-se, however it breaks too
+ 	 * many applications when removed.  It is unfortunate since
+@@ -424,7 +464,7 @@ int inet_bind(struct socket *sock, struc
+ 	err = -EADDRNOTAVAIL;
+ 	if (!sysctl_ip_nonlocal_bind &&
+ 	    !inet->freebind &&
+-	    addr->sin_addr.s_addr != INADDR_ANY &&
++	    s_addr != INADDR_ANY &&
+ 	    chk_addr_ret != RTN_LOCAL &&
+ 	    chk_addr_ret != RTN_MULTICAST &&
+ 	    chk_addr_ret != RTN_BROADCAST)
+@@ -449,7 +489,8 @@ int inet_bind(struct socket *sock, struc
+ 	if (sk->sk_state != TCP_CLOSE || inet->num)
+ 		goto out_release_sock;
+ 
+-	inet->rcv_saddr = inet->saddr = addr->sin_addr.s_addr;
++	inet->rcv_saddr = inet->saddr = s_addr1;
++	inet->rcv_saddr2 = s_addr2;
+ 	if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST)
+ 		inet->saddr = 0;  /* Use device */
+ 
+Index: linux-2.6.20/net/ipv4/devinet.c
+===================================================================
+--- linux-2.6.20.orig/net/ipv4/devinet.c
++++ linux-2.6.20/net/ipv4/devinet.c
+@@ -677,6 +677,8 @@ int devinet_ioctl(unsigned int cmd, void
+ 		*colon = ':';
+ 
+ 	if ((in_dev = __in_dev_get_rtnl(dev)) != NULL) {
++		struct nx_info *nxi = current->nx_info;
++
+ 		if (tryaddrmatch) {
+ 			/* Matthias Andree */
+ 			/* compare label and address (4.4BSD style) */
+@@ -685,6 +687,8 @@ int devinet_ioctl(unsigned int cmd, void
+ 			   This is checked above. */
+ 			for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL;
+ 			     ifap = &ifa->ifa_next) {
++				if (!nx_ifa_visible(nxi, ifa))
++					continue;
+ 				if (!strcmp(ifr.ifr_name, ifa->ifa_label) &&
+ 				    sin_orig.sin_addr.s_addr ==
+ 							ifa->ifa_address) {
+@@ -697,9 +701,12 @@ int devinet_ioctl(unsigned int cmd, void
+ 		   comparing just the label */
+ 		if (!ifa) {
+ 			for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL;
+-			     ifap = &ifa->ifa_next)
++			     ifap = &ifa->ifa_next) {
++				if (!nx_ifa_visible(nxi, ifa))
++					continue;
+ 				if (!strcmp(ifr.ifr_name, ifa->ifa_label))
+ 					break;
++			}
+ 		}
+ 	}
+ 
+@@ -850,6 +857,8 @@ static int inet_gifconf(struct net_devic
+ 		goto out;
+ 
+ 	for (; ifa; ifa = ifa->ifa_next) {
++		if (!nx_ifa_visible(current->nx_info, ifa))
++			continue;
+ 		if (!buf) {
+ 			done += sizeof(ifr);
+ 			continue;
+@@ -1176,6 +1185,7 @@ static int inet_dump_ifaddr(struct sk_bu
+ 	struct net_device *dev;
+ 	struct in_device *in_dev;
+ 	struct in_ifaddr *ifa;
++	struct sock *sk = skb->sk;
+ 	int s_ip_idx, s_idx = cb->args[0];
+ 
+ 	s_ip_idx = ip_idx = cb->args[1];
+@@ -1193,6 +1203,8 @@ static int inet_dump_ifaddr(struct sk_bu
+ 
+ 		for (ifa = in_dev->ifa_list, ip_idx = 0; ifa;
+ 		     ifa = ifa->ifa_next, ip_idx++) {
++			if (sk && !nx_ifa_visible(sk->sk_nx_info, ifa))
++				continue;
+ 			if (ip_idx < s_ip_idx)
+ 				continue;
+ 			if (inet_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).pid,
+Index: linux-2.6.20/net/ipv4/fib_hash.c
+===================================================================
+--- linux-2.6.20.orig/net/ipv4/fib_hash.c
++++ linux-2.6.20/net/ipv4/fib_hash.c
+@@ -1011,7 +1011,7 @@ static int fib_seq_show(struct seq_file 
+ 	prefix	= f->fn_key;
+ 	mask	= FZ_MASK(iter->zone);
+ 	flags	= fib_flag_trans(fa->fa_type, mask, fi);
+-	if (fi)
++	if (fi && nx_dev_visible(current->nx_info, fi->fib_dev))
+ 		snprintf(bf, sizeof(bf),
+ 			 "%s\t%08X\t%08X\t%04X\t%d\t%u\t%d\t%08X\t%d\t%u\t%u",
+ 			 fi->fib_dev ? fi->fib_dev->name : "*", prefix,
+Index: linux-2.6.20/net/ipv4/inet_connection_sock.c
+===================================================================
+--- linux-2.6.20.orig/net/ipv4/inet_connection_sock.c
++++ linux-2.6.20/net/ipv4/inet_connection_sock.c
+@@ -39,7 +39,6 @@ int sysctl_local_port_range[2] = { 1024,
+ int inet_csk_bind_conflict(const struct sock *sk,
+ 			   const struct inet_bind_bucket *tb)
+ {
+-	const __be32 sk_rcv_saddr = inet_rcv_saddr(sk);
+ 	struct sock *sk2;
+ 	struct hlist_node *node;
+ 	int reuse = sk->sk_reuse;
+@@ -52,9 +51,8 @@ int inet_csk_bind_conflict(const struct 
+ 		     sk->sk_bound_dev_if == sk2->sk_bound_dev_if)) {
+ 			if (!reuse || !sk2->sk_reuse ||
+ 			    sk2->sk_state == TCP_LISTEN) {
+-				const __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2);
+-				if (!sk2_rcv_saddr || !sk_rcv_saddr ||
+-				    sk2_rcv_saddr == sk_rcv_saddr)
++				if (nx_addr_conflict(sk->sk_nx_info,
++					inet_rcv_saddr(sk), sk2))
+ 					break;
+ 			}
+ 		}
+Index: linux-2.6.20/net/ipv4/inet_diag.c
+===================================================================
+--- linux-2.6.20.orig/net/ipv4/inet_diag.c
++++ linux-2.6.20/net/ipv4/inet_diag.c
+@@ -693,6 +693,8 @@ static int inet_diag_dump(struct sk_buff
+ 			sk_for_each(sk, node, &hashinfo->listening_hash[i]) {
+ 				struct inet_sock *inet = inet_sk(sk);
+ 
++				if (!nx_check(sk->sk_nid, VS_WATCH_P|VS_IDENT))
++					continue;
+ 				if (num < s_num) {
+ 					num++;
+ 					continue;
+@@ -753,6 +755,8 @@ skip_listen_ht:
+ 		sk_for_each(sk, node, &head->chain) {
+ 			struct inet_sock *inet = inet_sk(sk);
+ 
++			if (!nx_check(sk->sk_nid, VS_WATCH_P|VS_IDENT))
++				continue;
+ 			if (num < s_num)
+ 				goto next_normal;
+ 			if (!(r->idiag_states & (1 << sk->sk_state)))
+@@ -777,6 +781,8 @@ next_normal:
+ 			inet_twsk_for_each(tw, node,
+ 				    &hashinfo->ehash[i + hashinfo->ehash_size].chain) {
+ 
++				if (!nx_check(tw->tw_nid, VS_WATCH_P|VS_IDENT))
++					continue;
+ 				if (num < s_num)
+ 					goto next_dying;
+ 				if (r->id.idiag_sport != tw->tw_sport &&
+Index: linux-2.6.20/net/ipv4/inet_hashtables.c
+===================================================================
+--- linux-2.6.20.orig/net/ipv4/inet_hashtables.c
++++ linux-2.6.20/net/ipv4/inet_hashtables.c
+@@ -140,11 +140,10 @@ static struct sock *inet_lookup_listener
+ 			const __be32 rcv_saddr = inet->rcv_saddr;
+ 			int score = sk->sk_family == PF_INET ? 1 : 0;
+ 
+-			if (rcv_saddr) {
+-				if (rcv_saddr != daddr)
+-					continue;
++			if (inet_addr_match(sk->sk_nx_info, daddr, rcv_saddr))
+ 				score += 2;
+-			}
++			else
++				continue;
+ 			if (sk->sk_bound_dev_if) {
+ 				if (sk->sk_bound_dev_if != dif)
+ 					continue;
+@@ -175,7 +174,7 @@ struct sock *__inet_lookup_listener(stru
+ 		const struct inet_sock *inet = inet_sk((sk = __sk_head(head)));
+ 
+ 		if (inet->num == hnum && !sk->sk_node.next &&
+-		    (!inet->rcv_saddr || inet->rcv_saddr == daddr) &&
++		    inet_addr_match(sk->sk_nx_info, daddr, inet->rcv_saddr) &&
+ 		    (sk->sk_family == PF_INET || !ipv6_only_sock(sk)) &&
+ 		    !sk->sk_bound_dev_if)
+ 			goto sherry_cache;
+Index: linux-2.6.20/net/ipv4/raw.c
+===================================================================
+--- linux-2.6.20.orig/net/ipv4/raw.c
++++ linux-2.6.20/net/ipv4/raw.c
+@@ -78,6 +78,7 @@
+ #include <linux/seq_file.h>
+ #include <linux/netfilter.h>
+ #include <linux/netfilter_ipv4.h>
++// #include <linux/vs_base.h>
+ 
+ struct hlist_head raw_v4_htable[RAWV4_HTABLE_SIZE];
+ DEFINE_RWLOCK(raw_v4_lock);
+@@ -112,7 +113,8 @@ struct sock *__raw_v4_lookup(struct sock
+ 
+ 		if (inet->num == num 					&&
+ 		    !(inet->daddr && inet->daddr != raddr) 		&&
+-		    !(inet->rcv_saddr && inet->rcv_saddr != laddr)	&&
++		    raw_addr_match(sk->sk_nx_info, laddr,
++			inet->rcv_saddr, inet->rcv_saddr2)		&&
+ 		    !(sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif))
+ 			goto found; /* gotcha */
+ 	}
+@@ -312,6 +314,11 @@ static int raw_send_hdrinc(struct sock *
+ 		iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
+ 	}
+ 
++	err = -EPERM;
++	if (!nx_check(0, VS_ADMIN) && !capable(CAP_NET_RAW)
++		&& (!addr_in_nx_info(sk->sk_nx_info, iph->saddr)))
++		goto error_free;
++
+ 	err = NF_HOOK(PF_INET, NF_IP_LOCAL_OUT, skb, NULL, rt->u.dst.dev,
+ 		      dst_output);
+ 	if (err > 0)
+@@ -323,6 +330,7 @@ out:
+ 
+ error_fault:
+ 	err = -EFAULT;
++error_free:
+ 	kfree_skb(skb);
+ error:
+ 	IP_INC_STATS(IPSTATS_MIB_OUTDISCARDS);
+@@ -489,6 +497,12 @@ static int raw_sendmsg(struct kiocb *ioc
+ 		}
+ 
+ 		security_sk_classify_flow(sk, &fl);
++		if (sk->sk_nx_info) {
++			err = ip_find_src(sk->sk_nx_info, &rt, &fl);
++
++			if (err)
++				goto done;
++		}
+ 		err = ip_route_output_flow(&rt, &fl, sk, !(msg->msg_flags&MSG_DONTWAIT));
+ 	}
+ 	if (err)
+@@ -793,7 +807,8 @@ static struct sock *raw_get_first(struct
+ 		struct hlist_node *node;
+ 
+ 		sk_for_each(sk, node, &raw_v4_htable[state->bucket])
+-			if (sk->sk_family == PF_INET)
++			if (sk->sk_family == PF_INET &&
++				nx_check(sk->sk_nid, VS_WATCH_P|VS_IDENT))
+ 				goto found;
+ 	}
+ 	sk = NULL;
+@@ -809,7 +824,8 @@ static struct sock *raw_get_next(struct 
+ 		sk = sk_next(sk);
+ try_again:
+ 		;
+-	} while (sk && sk->sk_family != PF_INET);
++	} while (sk && (sk->sk_family != PF_INET ||
++		!nx_check(sk->sk_nid, VS_WATCH_P|VS_IDENT)));
+ 
+ 	if (!sk && ++state->bucket < RAWV4_HTABLE_SIZE) {
+ 		sk = sk_head(&raw_v4_htable[state->bucket]);
+Index: linux-2.6.20/net/ipv4/tcp.c
+===================================================================
+--- linux-2.6.20.orig/net/ipv4/tcp.c
++++ linux-2.6.20/net/ipv4/tcp.c
+@@ -259,6 +259,7 @@
+ #include <linux/cache.h>
+ #include <linux/err.h>
+ #include <linux/crypto.h>
++#include <linux/in.h>
+ 
+ #include <net/icmp.h>
+ #include <net/tcp.h>
+Index: linux-2.6.20/net/ipv4/tcp_ipv4.c
+===================================================================
+--- linux-2.6.20.orig/net/ipv4/tcp_ipv4.c
++++ linux-2.6.20/net/ipv4/tcp_ipv4.c
+@@ -77,6 +77,7 @@
+ #include <linux/stddef.h>
+ #include <linux/proc_fs.h>
+ #include <linux/seq_file.h>
++// #include <linux/vs_base.h>
+ 
+ #include <linux/crypto.h>
+ #include <linux/scatterlist.h>
+@@ -1968,6 +1969,12 @@ static void *listening_get_next(struct s
+ 		req = req->dl_next;
+ 		while (1) {
+ 			while (req) {
++				vxdprintk(VXD_CBIT(net, 6),
++					"sk,req: %p [#%d] (from %d)", req->sk,
++					(req->sk)?req->sk->sk_nid:0, nx_current_nid());
++				if (req->sk &&
++					!nx_check(req->sk->sk_nid, VS_WATCH_P|VS_IDENT))
++					continue;
+ 				if (req->rsk_ops->family == st->family) {
+ 					cur = req;
+ 					goto out;
+@@ -1992,6 +1999,10 @@ get_req:
+ 	}
+ get_sk:
+ 	sk_for_each_from(sk, node) {
++		vxdprintk(VXD_CBIT(net, 6), "sk: %p [#%d] (from %d)",
++			sk, sk->sk_nid, nx_current_nid());
++		if (!nx_check(sk->sk_nid, VS_WATCH_P|VS_IDENT))
++			continue;
+ 		if (sk->sk_family == st->family) {
+ 			cur = sk;
+ 			goto out;
+@@ -2043,18 +2054,26 @@ static void *established_get_first(struc
+ 
+ 		read_lock(&tcp_hashinfo.ehash[st->bucket].lock);
+ 		sk_for_each(sk, node, &tcp_hashinfo.ehash[st->bucket].chain) {
+-			if (sk->sk_family != st->family) {
++			vxdprintk(VXD_CBIT(net, 6),
++				"sk,egf: %p [#%d] (from %d)",
++				sk, sk->sk_nid, nx_current_nid());
++			if (!nx_check(sk->sk_nid, VS_WATCH_P|VS_IDENT))
++				continue;
++			if (sk->sk_family != st->family)
+ 				continue;
+-			}
+ 			rc = sk;
+ 			goto out;
+ 		}
+ 		st->state = TCP_SEQ_STATE_TIME_WAIT;
+ 		inet_twsk_for_each(tw, node,
+ 				   &tcp_hashinfo.ehash[st->bucket + tcp_hashinfo.ehash_size].chain) {
+-			if (tw->tw_family != st->family) {
++			vxdprintk(VXD_CBIT(net, 6),
++				"tw: %p [#%d] (from %d)",
++				tw, tw->tw_nid, nx_current_nid());
++			if (!nx_check(tw->tw_nid, VS_WATCH_P|VS_IDENT))
++				continue;
++			if (tw->tw_family != st->family)
+ 				continue;
+-			}
+ 			rc = tw;
+ 			goto out;
+ 		}
+@@ -2078,7 +2097,8 @@ static void *established_get_next(struct
+ 		tw = cur;
+ 		tw = tw_next(tw);
+ get_tw:
+-		while (tw && tw->tw_family != st->family) {
++		while (tw && (tw->tw_family != st->family ||
++			!nx_check(tw->tw_nid, VS_WATCH_P|VS_IDENT))) {
+ 			tw = tw_next(tw);
+ 		}
+ 		if (tw) {
+@@ -2102,6 +2122,11 @@ get_tw:
+ 		sk = sk_next(sk);
+ 
+ 	sk_for_each_from(sk, node) {
++		vxdprintk(VXD_CBIT(net, 6),
++			"sk,egn: %p [#%d] (from %d)",
++			sk, sk->sk_nid, nx_current_nid());
++		if (!nx_check(sk->sk_nid, VS_WATCH_P|VS_IDENT))
++			continue;
+ 		if (sk->sk_family == st->family)
+ 			goto found;
+ 	}
+Index: linux-2.6.20/net/ipv4/tcp_minisocks.c
+===================================================================
+--- linux-2.6.20.orig/net/ipv4/tcp_minisocks.c
++++ linux-2.6.20/net/ipv4/tcp_minisocks.c
+@@ -28,6 +28,10 @@
+ #include <net/inet_common.h>
+ #include <net/xfrm.h>
+ 
++#include <linux/vs_limit.h>
++#include <linux/vs_socket.h>
++#include <linux/vs_context.h>
++
+ #ifdef CONFIG_SYSCTL
+ #define SYNC_INIT 0 /* let the user enable it */
+ #else
+@@ -293,6 +297,11 @@ void tcp_time_wait(struct sock *sk, int 
+ 		tcptw->tw_ts_recent	= tp->rx_opt.ts_recent;
+ 		tcptw->tw_ts_recent_stamp = tp->rx_opt.ts_recent_stamp;
+ 
++		tw->tw_xid		= sk->sk_xid;
++		tw->tw_vx_info		= NULL;
++		tw->tw_nid		= sk->sk_nid;
++		tw->tw_nx_info		= NULL;
++
+ #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ 		if (tw->tw_family == PF_INET6) {
+ 			struct ipv6_pinfo *np = inet6_sk(sk);
+Index: linux-2.6.20/net/ipv4/udp.c
+===================================================================
+--- linux-2.6.20.orig/net/ipv4/udp.c
++++ linux-2.6.20/net/ipv4/udp.c
+@@ -219,11 +219,8 @@ __inline__ int udp_get_port(struct sock 
+ 
+ inline int ipv4_rcv_saddr_equal(const struct sock *sk1, const struct sock *sk2)
+ {
+-	struct inet_sock *inet1 = inet_sk(sk1), *inet2 = inet_sk(sk2);
+-
+ 	return 	( !ipv6_only_sock(sk2)  &&
+-		  (!inet1->rcv_saddr || !inet2->rcv_saddr ||
+-		   inet1->rcv_saddr == inet2->rcv_saddr      ));
++		   nx_addr_conflict(sk1->sk_nx_info, inet_rcv_saddr(sk1), sk2));
+ }
+ 
+ static inline int udp_v4_get_port(struct sock *sk, unsigned short snum)
+@@ -253,6 +250,11 @@ static struct sock *__udp4_lib_lookup(__
+ 				if (inet->rcv_saddr != daddr)
+ 					continue;
+ 				score+=2;
++			} else if (sk->sk_nx_info) {
++				if (addr_in_nx_info(sk->sk_nx_info, daddr))
++					score+=2;
++				else
++					continue;
+ 			}
+ 			if (inet->daddr) {
+ 				if (inet->daddr != saddr)
+@@ -299,7 +301,8 @@ static inline struct sock *udp_v4_mcast_
+ 		if (inet->num != hnum					||
+ 		    (inet->daddr && inet->daddr != rmt_addr)		||
+ 		    (inet->dport != rmt_port && inet->dport)		||
+-		    (inet->rcv_saddr && inet->rcv_saddr != loc_addr)	||
++		    (inet->rcv_saddr && inet->rcv_saddr != loc_addr &&
++		     inet->rcv_saddr2 && inet->rcv_saddr2 != loc_addr)	||
+ 		    ipv6_only_sock(s)					||
+ 		    (s->sk_bound_dev_if && s->sk_bound_dev_if != dif))
+ 			continue;
+@@ -628,7 +631,13 @@ int udp_sendmsg(struct kiocb *iocb, stru
+ 				    .uli_u = { .ports =
+ 					       { .sport = inet->sport,
+ 						 .dport = dport } } };
++		struct nx_info *nxi = sk->sk_nx_info;
++
+ 		security_sk_classify_flow(sk, &fl);
++		err = ip_find_src(nxi, &rt, &fl);
++		if (err)
++			goto out;
++
+ 		err = ip_route_output_flow(&rt, &fl, sk, !(msg->msg_flags&MSG_DONTWAIT));
+ 		if (err)
+ 			goto out;
+@@ -1540,7 +1549,8 @@ static struct sock *udp_get_first(struct
+ 	for (state->bucket = 0; state->bucket < UDP_HTABLE_SIZE; ++state->bucket) {
+ 		struct hlist_node *node;
+ 		sk_for_each(sk, node, state->hashtable + state->bucket) {
+-			if (sk->sk_family == state->family)
++			if (sk->sk_family == state->family &&
++				nx_check(sk->sk_nid, VS_WATCH_P|VS_IDENT))
+ 				goto found;
+ 		}
+ 	}
+@@ -1557,7 +1567,8 @@ static struct sock *udp_get_next(struct 
+ 		sk = sk_next(sk);
+ try_again:
+ 		;
+-	} while (sk && sk->sk_family != state->family);
++	} while (sk && (sk->sk_family != state->family ||
++		!nx_check(sk->sk_nid, VS_WATCH_P|VS_IDENT)));
+ 
+ 	if (!sk && ++state->bucket < UDP_HTABLE_SIZE) {
+ 		sk = sk_head(state->hashtable + state->bucket);
+Index: linux-2.6.20/net/ipv6/addrconf.c
+===================================================================
+--- linux-2.6.20.orig/net/ipv6/addrconf.c
++++ linux-2.6.20/net/ipv6/addrconf.c
+@@ -2736,7 +2736,10 @@ static void if6_seq_stop(struct seq_file
+ static int if6_seq_show(struct seq_file *seq, void *v)
+ {
+ 	struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
+-	seq_printf(seq,
++
++	/* no ipv6 inside a vserver for now */
++	if (nx_check(0, VS_ADMIN|VS_WATCH))
++		seq_printf(seq,
+ 		   NIP6_SEQFMT " %02x %02x %02x %02x %8s\n",
+ 		   NIP6(ifp->addr),
+ 		   ifp->idev->dev->ifindex,
+@@ -3208,6 +3211,10 @@ static int inet6_dump_addr(struct sk_buf
+ 	struct ifmcaddr6 *ifmca;
+ 	struct ifacaddr6 *ifaca;
+ 
++	/* no ipv6 inside a vserver for now */
++	if (skb->sk && skb->sk->sk_vx_info)
++		return skb->len;
++
+ 	s_idx = cb->args[0];
+ 	s_ip_idx = ip_idx = cb->args[1];
+ 	read_lock(&dev_base_lock);
+@@ -3479,6 +3486,10 @@ static int inet6_dump_ifinfo(struct sk_b
+ 	struct net_device *dev;
+ 	struct inet6_dev *idev;
+ 
++	/* no ipv6 inside a vserver for now */
++	if (skb->sk && skb->sk->sk_vx_info)
++		return skb->len;
++
+ 	read_lock(&dev_base_lock);
+ 	for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) {
+ 		if (idx < s_idx)
+Index: linux-2.6.20/net/netlink/af_netlink.c
+===================================================================
+--- linux-2.6.20.orig/net/netlink/af_netlink.c
++++ linux-2.6.20/net/netlink/af_netlink.c
+@@ -56,6 +56,9 @@
+ #include <linux/types.h>
+ #include <linux/audit.h>
+ #include <linux/selinux.h>
++#include <linux/vs_context.h>
++#include <linux/vs_network.h>
++#include <linux/vs_limit.h>
+ 
+ #include <net/sock.h>
+ #include <net/scm.h>
+Index: linux-2.6.20/net/socket.c
+===================================================================
+--- linux-2.6.20.orig/net/socket.c
++++ linux-2.6.20/net/socket.c
+@@ -92,6 +92,8 @@
+ 
+ #include <net/sock.h>
+ #include <linux/netfilter.h>
++#include <linux/vs_base.h>
++#include <linux/vs_socket.h>
+ 
+ static int sock_no_open(struct inode *irrelevant, struct file *dontcare);
+ static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov,
+@@ -552,7 +554,7 @@ static inline int __sock_sendmsg(struct 
+ 				 struct msghdr *msg, size_t size)
+ {
+ 	struct sock_iocb *si = kiocb_to_siocb(iocb);
+-	int err;
++	int err, len;
+ 
+ 	si->sock = sock;
+ 	si->scm = NULL;
+@@ -563,7 +565,22 @@ static inline int __sock_sendmsg(struct 
+ 	if (err)
+ 		return err;
+ 
+-	return sock->ops->sendmsg(iocb, sock, msg, size);
++	len = sock->ops->sendmsg(iocb, sock, msg, size);
++	if (sock->sk) {
++		if (len == size)
++			vx_sock_send(sock->sk, size);
++		else
++			vx_sock_fail(sock->sk, size);
++	}
++	vxdprintk(VXD_CBIT(net, 7),
++		"__sock_sendmsg: %p[%p,%p,%p;%d/%d]:%d/%d",
++		sock, sock->sk,
++		(sock->sk)?sock->sk->sk_nx_info:0,
++		(sock->sk)?sock->sk->sk_vx_info:0,
++		(sock->sk)?sock->sk->sk_xid:0,
++		(sock->sk)?sock->sk->sk_nid:0,
++		(unsigned int)size, len);
++	return len;
+ }
+ 
+ int sock_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
+@@ -601,7 +618,7 @@ int kernel_sendmsg(struct socket *sock, 
+ static inline int __sock_recvmsg(struct kiocb *iocb, struct socket *sock,
+ 				 struct msghdr *msg, size_t size, int flags)
+ {
+-	int err;
++	int err, len;
+ 	struct sock_iocb *si = kiocb_to_siocb(iocb);
+ 
+ 	si->sock = sock;
+@@ -614,7 +631,18 @@ static inline int __sock_recvmsg(struct 
+ 	if (err)
+ 		return err;
+ 
+-	return sock->ops->recvmsg(iocb, sock, msg, size, flags);
++	len = sock->ops->recvmsg(iocb, sock, msg, size, flags);
++	if ((len >= 0) && sock->sk)
++		vx_sock_recv(sock->sk, len);
++	vxdprintk(VXD_CBIT(net, 7),
++		"__sock_recvmsg: %p[%p,%p,%p;%d/%d]:%d/%d",
++		sock, sock->sk,
++		(sock->sk)?sock->sk->sk_nx_info:0,
++		(sock->sk)?sock->sk->sk_vx_info:0,
++		(sock->sk)?sock->sk->sk_xid:0,
++		(sock->sk)?sock->sk->sk_nid:0,
++		(unsigned int)size, len);
++	return len;
+ }
+ 
+ int sock_recvmsg(struct socket *sock, struct msghdr *msg,
+@@ -1068,6 +1096,10 @@ static int __sock_create(int family, int
+ 	if (type < 0 || type >= SOCK_MAX)
+ 		return -EINVAL;
+ 
++	/* disable IPv6 inside vservers for now */
++	if (family == PF_INET6 && !nx_check(0, VS_ADMIN))
++		return -EAFNOSUPPORT;
++
+ 	/* Compatibility.
+ 
+ 	   This uglymoron is moved from INET layer to here to avoid
+@@ -1185,6 +1217,7 @@ asmlinkage long sys_socket(int family, i
+ 	if (retval < 0)
+ 		goto out;
+ 
++	set_bit(SOCK_USER_SOCKET, &sock->flags);
+ 	retval = sock_map_fd(sock);
+ 	if (retval < 0)
+ 		goto out_release;
+@@ -1216,10 +1249,12 @@ asmlinkage long sys_socketpair(int famil
+ 	err = sock_create(family, type, protocol, &sock1);
+ 	if (err < 0)
+ 		goto out;
++	set_bit(SOCK_USER_SOCKET, &sock1->flags);
+ 
+ 	err = sock_create(family, type, protocol, &sock2);
+ 	if (err < 0)
+ 		goto out_release_1;
++	set_bit(SOCK_USER_SOCKET, &sock2->flags);
+ 
+ 	err = sock1->ops->socketpair(sock1, sock2);
+ 	if (err < 0)
+Index: linux-2.6.20/net/sunrpc/auth.c
+===================================================================
+--- linux-2.6.20.orig/net/sunrpc/auth.c
++++ linux-2.6.20/net/sunrpc/auth.c
+@@ -13,6 +13,7 @@
+ #include <linux/errno.h>
+ #include <linux/sunrpc/clnt.h>
+ #include <linux/spinlock.h>
++#include <linux/vs_tag.h>
+ 
+ #ifdef RPC_DEBUG
+ # define RPCDBG_FACILITY	RPCDBG_AUTH
+@@ -263,6 +264,7 @@ rpcauth_lookupcred(struct rpc_auth *auth
+ 	struct auth_cred acred = {
+ 		.uid = current->fsuid,
+ 		.gid = current->fsgid,
++		.tag = dx_current_tag(),
+ 		.group_info = current->group_info,
+ 	};
+ 	struct rpc_cred *ret;
+@@ -282,6 +284,7 @@ rpcauth_bindcred(struct rpc_task *task)
+ 	struct auth_cred acred = {
+ 		.uid = current->fsuid,
+ 		.gid = current->fsgid,
++		.tag = dx_current_tag(),
+ 		.group_info = current->group_info,
+ 	};
+ 	struct rpc_cred *ret;
+Index: linux-2.6.20/net/sunrpc/auth_unix.c
+===================================================================
+--- linux-2.6.20.orig/net/sunrpc/auth_unix.c
++++ linux-2.6.20/net/sunrpc/auth_unix.c
+@@ -11,12 +11,14 @@
+ #include <linux/module.h>
+ #include <linux/sunrpc/clnt.h>
+ #include <linux/sunrpc/auth.h>
++#include <linux/vs_tag.h>
+ 
+ #define NFS_NGROUPS	16
+ 
+ struct unx_cred {
+ 	struct rpc_cred		uc_base;
+ 	gid_t			uc_gid;
++	tag_t			uc_tag;
+ 	gid_t			uc_gids[NFS_NGROUPS];
+ };
+ #define uc_uid			uc_base.cr_uid
+@@ -78,6 +80,7 @@ unx_create_cred(struct rpc_auth *auth, s
+ 	if (flags & RPCAUTH_LOOKUP_ROOTCREDS) {
+ 		cred->uc_uid = 0;
+ 		cred->uc_gid = 0;
++		cred->uc_tag = dx_current_tag();
+ 		cred->uc_gids[0] = NOGROUP;
+ 	} else {
+ 		int groups = acred->group_info->ngroups;
+@@ -86,6 +89,7 @@ unx_create_cred(struct rpc_auth *auth, s
+ 
+ 		cred->uc_uid = acred->uid;
+ 		cred->uc_gid = acred->gid;
++		cred->uc_tag = acred->tag;
+ 		for (i = 0; i < groups; i++)
+ 			cred->uc_gids[i] = GROUP_AT(acred->group_info, i);
+ 		if (i < NFS_NGROUPS)
+@@ -117,7 +121,8 @@ unx_match(struct auth_cred *acred, struc
+ 		int groups;
+ 
+ 		if (cred->uc_uid != acred->uid
+-		 || cred->uc_gid != acred->gid)
++		 || cred->uc_gid != acred->gid
++		 || cred->uc_tag != acred->tag)
+ 			return 0;
+ 
+ 		groups = acred->group_info->ngroups;
+@@ -143,7 +148,7 @@ unx_marshal(struct rpc_task *task, __be3
+ 	struct rpc_clnt	*clnt = task->tk_client;
+ 	struct unx_cred	*cred = (struct unx_cred *) task->tk_msg.rpc_cred;
+ 	__be32		*base, *hold;
+-	int		i;
++	int		i, tag;
+ 
+ 	*p++ = htonl(RPC_AUTH_UNIX);
+ 	base = p++;
+@@ -153,9 +158,12 @@ unx_marshal(struct rpc_task *task, __be3
+ 	 * Copy the UTS nodename captured when the client was created.
+ 	 */
+ 	p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
++	tag = task->tk_client->cl_tag;
+ 
+-	*p++ = htonl((u32) cred->uc_uid);
+-	*p++ = htonl((u32) cred->uc_gid);
++	*p++ = htonl((u32) TAGINO_UID(tag,
++		cred->uc_uid, cred->uc_tag));
++	*p++ = htonl((u32) TAGINO_GID(tag,
++		cred->uc_gid, cred->uc_tag));
+ 	hold = p++;
+ 	for (i = 0; i < 16 && cred->uc_gids[i] != (gid_t) NOGROUP; i++)
+ 		*p++ = htonl((u32) cred->uc_gids[i]);
+Index: linux-2.6.20/net/sunrpc/clnt.c
+===================================================================
+--- linux-2.6.20.orig/net/sunrpc/clnt.c
++++ linux-2.6.20/net/sunrpc/clnt.c
+@@ -30,6 +30,7 @@
+ #include <linux/smp_lock.h>
+ #include <linux/utsname.h>
+ #include <linux/workqueue.h>
++#include <linux/vs_cvirt.h>
+ 
+ #include <linux/sunrpc/clnt.h>
+ #include <linux/sunrpc/rpc_pipe_fs.h>
+@@ -245,7 +246,9 @@ struct rpc_clnt *rpc_create(struct rpc_c
+ 		clnt->cl_autobind = 1;
+ 	if (args->flags & RPC_CLNT_CREATE_ONESHOT)
+ 		clnt->cl_oneshot = 1;
+-
++	/* TODO: handle RPC_CLNT_CREATE_TAGGED
++	if (args->flags & RPC_CLNT_CREATE_TAGGED)
++		clnt->cl_tag = 1; */
+ 	return clnt;
+ }
+ EXPORT_SYMBOL_GPL(rpc_create);
+Index: linux-2.6.20/net/unix/af_unix.c
+===================================================================
+--- linux-2.6.20.orig/net/unix/af_unix.c
++++ linux-2.6.20/net/unix/af_unix.c
+@@ -116,6 +116,8 @@
+ #include <linux/mount.h>
+ #include <net/checksum.h>
+ #include <linux/security.h>
++#include <linux/vs_context.h>
++#include <linux/vs_limit.h>
+ 
+ int sysctl_unix_max_dgram_qlen __read_mostly = 10;
+ 
+@@ -253,6 +255,8 @@ static struct sock *__unix_find_socket_b
+ 	sk_for_each(s, node, &unix_socket_table[hash ^ type]) {
+ 		struct unix_sock *u = unix_sk(s);
+ 
++		if (!nx_check(s->sk_nid, VS_WATCH_P|VS_IDENT))
++			continue;
+ 		if (u->addr->len == len &&
+ 		    !memcmp(u->addr->name, sunname, len))
+ 			goto found;
+@@ -808,7 +812,7 @@ static int unix_bind(struct socket *sock
+ 		 */
+ 		mode = S_IFSOCK |
+ 		       (SOCK_INODE(sock)->i_mode & ~current->fs->umask);
+-		err = vfs_mknod(nd.dentry->d_inode, dentry, mode, 0);
++		err = vfs_mknod(nd.dentry->d_inode, dentry, mode, 0, NULL);
+ 		if (err)
+ 			goto out_mknod_dput;
+ 		mutex_unlock(&nd.dentry->d_inode->i_mutex);
+Index: linux-2.6.20/net/x25/af_x25.c
+===================================================================
+--- linux-2.6.20.orig/net/x25/af_x25.c
++++ linux-2.6.20/net/x25/af_x25.c
+@@ -499,7 +499,10 @@ static int x25_create(struct socket *soc
+ 
+ 	x25 = x25_sk(sk);
+ 
+-	sock_init_data(sock, sk);
++	sk->sk_socket = sock;
++	sk->sk_type = sock->type;
++	sk->sk_sleep = &sock->wait;
++	sock->sk = sk;
+ 
+ 	x25_init_timers(sk);
+ 
+Index: linux-2.6.20/security/commoncap.c
+===================================================================
+--- linux-2.6.20.orig/security/commoncap.c
++++ linux-2.6.20/security/commoncap.c
+@@ -23,10 +23,11 @@
+ #include <linux/ptrace.h>
+ #include <linux/xattr.h>
+ #include <linux/hugetlb.h>
++#include <linux/vs_context.h>
+ 
+ int cap_netlink_send(struct sock *sk, struct sk_buff *skb)
+ {
+-	NETLINK_CB(skb).eff_cap = current->cap_effective;
++	cap_t(NETLINK_CB(skb).eff_cap) = vx_mbcap(cap_effective);
+ 	return 0;
+ }
+ 
+@@ -44,7 +45,7 @@ EXPORT_SYMBOL(cap_netlink_recv);
+ int cap_capable (struct task_struct *tsk, int cap)
+ {
+ 	/* Derived from include/linux/sched.h:capable. */
+-	if (cap_raised(tsk->cap_effective, cap))
++       if (vx_cap_raised(tsk->vx_info, tsk->cap_effective, cap))
+ 		return 0;
+ 	return -EPERM;
+ }
+@@ -142,7 +143,8 @@ void cap_bprm_apply_creds (struct linux_
+ 	/* Derived from fs/exec.c:compute_creds. */
+ 	kernel_cap_t new_permitted, working;
+ 
+-	new_permitted = cap_intersect (bprm->cap_permitted, cap_bset);
++	new_permitted = cap_intersect (bprm->cap_permitted,
++					vx_current_cap_bset());
+ 	working = cap_intersect (bprm->cap_inheritable,
+ 				 current->cap_inheritable);
+ 	new_permitted = cap_combine (new_permitted, working);
+@@ -311,7 +313,8 @@ void cap_task_reparent_to_init (struct t
+ 
+ int cap_syslog (int type)
+ {
+-	if ((type != 3 && type != 10) && !capable(CAP_SYS_ADMIN))
++	if ((type != 3 && type != 10) &&
++		!vx_capable(CAP_SYS_ADMIN, VXC_SYSLOG))
+ 		return -EPERM;
+ 	return 0;
+ }
+Index: linux-2.6.20/security/dummy.c
+===================================================================
+--- linux-2.6.20.orig/security/dummy.c
++++ linux-2.6.20/security/dummy.c
+@@ -28,6 +28,7 @@
+ #include <linux/hugetlb.h>
+ #include <linux/ptrace.h>
+ #include <linux/file.h>
++#include <linux/vs_context.h>
+ 
+ static int dummy_ptrace (struct task_struct *parent, struct task_struct *child)
+ {
+@@ -84,7 +85,7 @@ static int dummy_sysctl (ctl_table * tab
+ 	return 0;
+ }
+ 
+-static int dummy_quotactl (int cmds, int type, int id, struct super_block *sb)
++static int dummy_quotactl (int cmds, int type, int id, struct dqhash *hash)
+ {
+ 	return 0;
+ }
+@@ -678,7 +679,7 @@ static int dummy_sem_semop (struct sem_a
+ 
+ static int dummy_netlink_send (struct sock *sk, struct sk_buff *skb)
+ {
+-	NETLINK_CB(skb).eff_cap = current->cap_effective;
++	cap_t(NETLINK_CB(skb).eff_cap) = vx_mbcap(cap_effective);
+ 	return 0;
+ }
+ 
+Index: linux-2.6.20/security/selinux/hooks.c
+===================================================================
+--- linux-2.6.20.orig/security/selinux/hooks.c
++++ linux-2.6.20/security/selinux/hooks.c
+@@ -1464,9 +1464,10 @@ static int selinux_sysctl(ctl_table *tab
+ 	return error;
+ }
+ 
+-static int selinux_quotactl(int cmds, int type, int id, struct super_block *sb)
++static int selinux_quotactl(int cmds, int type, int id, struct dqhash *hash)
+ {
+ 	int rc = 0;
++	struct super_block *sb = hash->dqh_sb;
+ 
+ 	if (!sb)
+ 		return 0;