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#!/sbin/openrc-run
#
# Control Groups Configuration Startup
#
# This script runs the cgconfigparser utility to parse and setup
# the control group filesystem. It uses ${CONFIG_FILE}
# and parses the configuration specified in there.
#
CGCONFIGPARSER="/usr/sbin/cgconfigparser"
CGROUP_FS="cgroup"
CONFIG_FILE=${CONFIG_FILE:-"/etc/cgroup/cgconfig.conf"}
MOUNTS_FILE="/proc/mounts"
RULES_FILE="/etc/cgroup/cgrules.conf"
# Support multiple mount points
MAX_INDEX=0
declare -a MOUNT_POINTS MOUNT_OPTIONS
move_all_to_init_class() {
local i
for i in $(seq 1 ${MAX_INDEX}); do
cd ${MOUNT_POINTS[$i]}
if grep -qw ${MOUNT_POINTS[$i]} ${MOUNTS_FILE}; then
local directory
for directory in $(find . -depth -type d); do
if [[ ${directory} != "." ]]; then
# cat fails with "Argument list too long" error
sed -nu p < ${directory}/tasks > tasks
rmdir ${directory}
fi
done
else
ewarn "Resource control filesystem not mounted"
fi
cd - >/dev/null
done
}
parse_mounts() {
local device mount_point fs_type options other
while read device mount_point fs_type options other; do
if grep -q ${device} <<< ${CGROUP_FS}; then
let MAX_INDEX++
MOUNT_POINTS[${MAX_INDEX}]=${mount_point}
MOUNT_OPTIONS[${MAX_INDEX}]=${options}
fi
done < ${MOUNTS_FILE}
}
umount_fs() {
local i
for i in $(seq 1 ${MAX_INDEX}); do
umount ${MOUNT_POINTS[$i]}
rmdir ${MOUNT_POINTS[$i]}
done
}
start() {
ebegin "Starting cgconfig service"
# Mount filesystem and create cgroups
if ! ${CGCONFIGPARSER} -l ${CONFIG_FILE} >/dev/null; then
eend 1 "Failed to parse ${CONFIG_FILE}"
return 1
fi
parse_mounts
# Find default cgroup name in rules file
local default_cgroup
if [[ -f ${RULES_FILE} ]]; then
local user controller
read user controller default_cgroup <<< $(grep -m1 '^\*\s' ${RULES_FILE})
if [[ $default_cgroup == "*" ]]; then
ewarn "${RULES_FILE} incorrect"
ewarn "Overriding it"
default_cgroup=
fi
fi
# Use predefined name if none was found
if [[ -z ${default_cgroup} ]]; then
default_cgroup=sysdefault
fi
# Create a default cgroup for tasks to return back to
local i
for i in $(seq 1 ${MAX_INDEX}); do
# Ignore if directory already exists
mkdir -p ${MOUNT_POINTS[$i]}/${default_cgroup}
find ${MOUNT_POINTS[$i]}/ -name tasks | xargs chmod a+rw
chmod go-w ${MOUNT_POINTS[$i]}/tasks
# Special rule for cpusets
if grep -qw cpuset <<< ${MOUNT_OPTIONS[$i]}; then
cat ${MOUNT_POINTS[$i]}/cpuset.cpus > ${MOUNT_POINTS[$i]}/${default_cgroup}/cpuset.cpus
cat ${MOUNT_POINTS[$i]}/cpuset.mems > ${MOUNT_POINTS[$i]}/${default_cgroup}/cpuset.mems
fi
# Classify everything to default cgroup
local j
for j in $(ps --no-headers -eL o tid); do
echo $j > ${MOUNT_POINTS[$i]}/${default_cgroup}/tasks 2>/dev/null
done
done
eend 0
}
stop() {
ebegin "Stopping cgconfig service"
parse_mounts
move_all_to_init_class
umount_fs
eend 0
}
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