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|
#!/bin/sh
# 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/HEAD/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/HEAD/LICENSE
# This file may not be copied, modified, propagated, or distributed
# except according to the terms contained in the LICENSE file.
set -eux
cgroup_opts=${cgroup_opts:-nodev,noexec,nosuid}
rc_cgroup_mode=${cgroup_mode:-hybrid}
rc_cgroup_controllers=${cgroup_controllers:-}
rc_cgroup_memory_use_hierarchy=${cgroup_memory_use_hierarchy:-no}
rc_cgroupsize=${cgroupsize:-10m}
yesno()
{
[ -z "$1" ] && return 1
case "$1" in
[Yy][Ee][Ss]|[Tt][Rr][Uu]|[Oo][Nn]|1) return 0 ;;
[Nn][Oo]|[Ff][Aa][Ll][Ss]|[Oo][Ff][Ff]|0) return 1 ;;
esac
local value=
eval value=\"\$$1\"
case "$value" in
[Yy][Ee][Ss]|[Tt][Rr][Uu]|[Oo][Nn]|1) return 0 ;;
[Nn][Oo]|[Ff][Aa][Ll][Ss]|[Oo][Ff][Ff]|0) return 1 ;;
*) echo "\$$1 is not set properly" >&2; return 2 ;;
esac
}
cgroup2_find_path()
{
if grep -qw cgroup2 /proc/filesystems; then
case "${rc_cgroup_mode}" in
hybrid) printf "/sys/fs/cgroup/unified" ;;
unified) printf "/sys/fs/cgroup" ;;
esac
fi
return 0
}
cgroup1_base()
{
grep -qw cgroup /proc/filesystems || return 0
if ! mountpoint -q /sys/fs/cgroup; then
local opts="${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/s6-rc/src/mount-cgroups/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) mountpoint -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="$(cgroup2_find_path)"
if ! mountpoint -q "${base}"; then
mkdir -p "${base}"
mount -t cgroup2 none -o "${cgroup_opts},nsdelegate" "${base}" 2> /dev/null ||
mount -t cgroup2 none -o "${cgroup_opts}" "${base}"
fi
return 0
}
cgroup2_controllers()
{
grep -qw cgroup2 /proc/filesystems || return 0
local active cgroup_path x y
cgroup_path="$(cgroup2_find_path)"
[ -z "${cgroup_path}" ] && return 0
[ ! -e "${cgroup_path}/cgroup.controllers" ] && return 0
[ ! -e "${cgroup_path}/cgroup.subtree_control" ]&& return 0
read -r active < "${cgroup_path}/cgroup.controllers"
for x in ${active}; do
case "${rc_cgroup_mode}" in
unified)
echo "+${x}" > "${cgroup_path}/cgroup.subtree_control"
;;
hybrid)
for y in ${rc_cgroup_controllers}; do
if [ "$x" = "$y" ]; then
echo "+${x}" > "${cgroup_path}/cgroup.subtree_control"
fi
done
;;
esac
done
return 0
}
cgroups_hybrid()
{
cgroup1_base
cgroup2_base
cgroup2_controllers
cgroup1_controllers
return 0
}
cgroups_legacy()
{
cgroup1_base
cgroup1_controllers
return 0
}
cgroups_unified()
{
cgroup2_base
cgroup2_controllers
return 0
}
mount_cgroups()
{
case "${rc_cgroup_mode}" in
hybrid) cgroups_hybrid ;;
unified) cgroups_unified ;;
legacy) cgroups_legacy ;;
esac
return 0
}
restorecon_cgroups()
{
if [ -x /sbin/restorecon ]; then
restorecon -rF /sys/fs/cgroup >/dev/null 2>&1
fi
return 0
}
# set up kernel support for cgroups
if [ -d /sys/fs/cgroup ]; then
mount_cgroups
restorecon_cgroups
fi
|
