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#!/bin/sh
CGROUP_OPTS=nodev,noexec,nosuid
CGROUP_MODE=$1
CGROUP_CONTROLLERS=$2
HAVE_CONTROLLER1_GROUPS=$3
if [ $CGROUP_CONTROLLERS = "none" ]; then
CGROUP_CONTROLLERS=""
fi
cgroup2_find_path() {
if grep -qw cgroup2 /proc/filesystems; then
case "${CGROUP_MODE}" in
hybrid) printf "/sys/fs/cgroup/unified" ;;
unified) printf "/sys/fs/cgroup" ;;
esac
fi
return 0
}
cgroup1_base() {
grep -qw cgroup /proc/filesystems || return 0
if ! mountpoint -q /sys/fs/cgroup; then
local opts="${CGROUP_OPTS},mode=755,size=${rc_cgroupsize:-10m}"
mount -n -t tmpfs -o "${opts}" cgroup_root /sys/fs/cgroup
fi
if ! mountpoint -q /sys/fs/cgroup/openrc; then
local agent="/etc/66/script/cgroups-release.sh"
mkdir /sys/fs/cgroup/openrc
mount -n -t cgroup -o none,${CGROUP_OPTS},name=openrc,release_agent="$agent" openrc /sys/fs/cgroup/openrc
printf 1 > /sys/fs/cgroup/openrc/notify_on_release
fi
return 0
}
cgroup1_controllers() {
${HAVE_CONTROLLER1_GROUPS} && [ -e /proc/cgroups ] && grep -qw cgroup /proc/filesystems || return 0
while read -r name _ _ enabled _; do
case "${enabled}" in
1) if mountpoint -q "/sys/fs/cgroup/${name}";then continue;fi
local x
for x in $CGROUP_CONTROLLERS; do
[ "${name}" = "blkio" ] && [ "${x}" = "io" ] &&
continue 2
[ "${name}" = "${x}" ] &&
continue 2
done
mkdir "/sys/fs/cgroup/${name}"
mount -n -t cgroup -o "${CGROUP_OPTS},${name}" "${name}" "/sys/fs/cgroup/${name}"
;;
esac
done < /proc/cgroups
return 0
}
cgroup2_base() {
grep -qw cgroup2 /proc/filesystems || return 0
local base
base="$(cgroup2_find_path)"
mkdir -p "${base}"
mount -t cgroup2 none -o "${CGROUP_OPTS},nsdelegate" "${base}" 2> /dev/null ||
mount -t cgroup2 none -o "${CGROUP_OPTS}" "${base}"
return 0
}
cgroup2_controllers() {
grep -qw cgroup2 /proc/filesystems || return 0
local active cgroup_path x y
cgroup_path="$(cgroup2_find_path)"
[ -z "${cgroup_path}" ] && return 0
[ -e "${cgroup_path}/cgroup.controllers" ] && read -r active < "${cgroup_path}/cgroup.controllers"
for x in ${CGROUP_CONTROLLERS}; do
for y in ${active}; do
[ "$x" = "$y" ] && [ -e "${cgroup_path}/cgroup.subtree_control" ] &&
echo "+${x}" > "${cgroup_path}/cgroup.subtree_control"
done
done
return 0
}
cgroups_hybrid() {
cgroup1_base
cgroup2_base
cgroup2_controllers
cgroup1_controllers
return 0
}
cgroups_legacy() {
cgroup1_base
cgroup1_controllers
return 0
}
cgroups_unified() {
cgroup2_base
cgroup2_controllers
return 0
}
mount_cgroups() {
case "${CGROUP_MODE}" in
hybrid) cgroups_hybrid ;;
legacy) cgroups_legacy ;;
unified) cgroups_unified ;;
esac
return 0
}
mount_cgs() {
if [ -d /sys/fs/cgroup ];then
mount_cgroups
return 0
fi
return 1
}
mount_cgs