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#!@SBINDIR@/openrc-run
# Copyright (c) 2017 The OpenRC Authors.
# See the Authors file at the top-level directory of this distribution and
# https://github.com/OpenRC/openrc/blob/master/AUTHORS
#
# This file is part of OpenRC. It is subject to the license terms in
# the LICENSE file found in the top-level directory of this
# distribution and at https://github.com/OpenRC/openrc/blob/master/LICENSE
# This file may not be copied, modified, propagated, or distributed
# except according to the terms contained in the LICENSE file.
description="Mount the control groups."
cgroup_opts=nodev,noexec,nosuid
depend()
{
keyword -docker -prefix -systemd-nspawn -vserver
after sysfs
}
cgroup1_base()
{
grep -qw cgroup /proc/filesystems || return 0
if ! mountinfo -q /sys/fs/cgroup; then
ebegin "Mounting cgroup filesystem"
local opts="${cgroup_opts},mode=755,size=${rc_cgroupsize:-10m}"
mount -n -t tmpfs -o "${opts}" cgroup_root /sys/fs/cgroup
eend $?
fi
if ! mountinfo -q /sys/fs/cgroup/openrc; then
local agent="${RC_LIBEXECDIR}/sh/cgroup-release-agent.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()
{
yesno "${rc_controller_cgroups:-YES}" && [ -e /proc/cgroups ] &&
grep -qw cgroup /proc/filesystems || return 0
while read -r name _ _ enabled _; do
case "${enabled}" in
1) mountinfo -q "/sys/fs/cgroup/${name}" && continue
local x
for x in $rc_cgroup_controllers; do
[ "${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}"
yesno "${rc_cgroup_memory_use_hierarchy:-no}" &&
[ "${name}" = memory ] &&
echo 1 > /sys/fs/cgroup/memory/memory.use_hierarchy
;;
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 ${rc_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 "${rc_cgroup_mode:-hybrid}" in
hybrid) cgroups_hybrid ;;
legacy) cgroups_legacy ;;
unified) cgroups_unified ;;
esac
return 0
}
restorecon_cgroups()
{
if [ -x /sbin/restorecon ]; then
ebegin "Restoring SELinux contexts in /sys/fs/cgroup"
restorecon -rF /sys/fs/cgroup >/dev/null 2>&1
eend $?
fi
return 0
}
start()
{
# set up kernel support for cgroups
if [ -d /sys/fs/cgroup ]; then
mount_cgroups
restorecon_cgroups
fi
return 0
}
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