cgroups: add configurable cgroups_name

etc/rc.conf

@@ -201,6 +201,9 @@ rc_tty_number=12
 # "unified" mounts cgroups version 2 on /sys/fs/cgroup
 #rc_cgroup_mode="unified"
 
+# override cgroup controller name
+#rc_cgroup_name=openrc
+
 # This is a list of controllers which should be enabled for cgroups version 2
 # when hybrid mode is being used.
 # Controllers listed here will not be available for cgroups version 1.

init.d/cgroups.in

@@ -13,6 +13,8 @@ description="Mount the control groups."
 
 : "${cgroup_opts:="nodev,noexec,nosuid"}"
 
+rc_cgroup_name=${rc_cgroup_name:-openrc}
+
 depend()
 {
 	keyword -docker -prefix -systemd-nspawn -vserver
@@ -29,13 +31,13 @@ cgroup1_base()
 		eend $?
 	fi
 
-	if ! mountinfo -q /sys/fs/cgroup/openrc; then
+	if ! mountinfo -q /sys/fs/cgroup/"${rc_cgroup_name}"; then
 		local agent="${RC_LIBEXECDIR}/sh/cgroup-release-agent.sh"
-		mkdir /sys/fs/cgroup/openrc
+		mkdir /sys/fs/cgroup/"${rc_cgroup_name}"
 		mount -n -t cgroup \
-			-o none,${cgroup_opts},name=openrc,release_agent="$agent" \
-			openrc /sys/fs/cgroup/openrc
-		printf 1 > /sys/fs/cgroup/openrc/notify_on_release
+			-o none,${cgroup_opts},name="${rc_cgroup_name}",release_agent="$agent" \
+			"${rc_cgroup_name}" /sys/fs/cgroup/"${rc_cgroup_name}"
+		printf 1 > /sys/fs/cgroup/"${rc_cgroup_name}"/notify_on_release
 	fi
 	return 0
 }
@@ -74,6 +76,7 @@ cgroup2_base()
 	mkdir -p "${base}"
 	mount -t cgroup2 none -o "${cgroup_opts},nsdelegate" "${base}" 2> /dev/null ||
 		mount -t cgroup2 none -o "${cgroup_opts}" "${base}"
+ mkdir -p ${base}/"${rc_cgroup_name}"
 	return 0
 }
 
@@ -81,7 +84,7 @@ cgroup2_controllers()
 {
 	grep -qw cgroup2 /proc/filesystems || return 0
 	local active cgroup_path x y
-	cgroup_path="$(cgroup2_find_path)"
+	cgroup_path="$(cgroup2_find_path)/${rc_cgroup_name}"
 	[ -z "${cgroup_path}" ] && return 0
 	[ ! -e "${cgroup_path}/cgroup.controllers" ] && return 0
 	[ ! -e "${cgroup_path}/cgroup.subtree_control" ]&& return 0

sh/cgroup-release-agent.sh.in

@@ -12,7 +12,7 @@
 # This file may not be copied, modified, propagated, or distributed
 #    except according to the terms contained in the LICENSE file.
 
-cgroup=/sys/fs/cgroup/openrc
+cgroup=/sys/fs/cgroup/"${rc_cgroup_name:-openrc}"
 PATH=/bin:/usr/bin:/sbin:/usr/sbin
 if [ -d ${cgroup}/"$1" ]; then
 	rmdir ${cgroup}/"$1"

sh/rc-cgroup.sh

@@ -11,6 +11,8 @@
 extra_stopped_commands="${extra_stopped_commands} cgroup_cleanup"
 description_cgroup_cleanup="Kill all processes in the cgroup"
 
+cg2_sv_name="${RC_SVCNAME}.sv"
+
 cgroup_find_path()
 {
 	local OIFS name dir result
@@ -35,9 +37,9 @@ cgroup_get_pids()
 	cgroup_pids=
 	cgroup_procs="$(cgroup2_find_path)"
 	if [ -n "${cgroup_procs}" ]; then
-		cgroup_procs="${cgroup_procs}/openrc.${RC_SVCNAME}/cgroup.procs"
+		cgroup_procs="${cgroup_procs}/${rc_cgroup_name}/${cg2_sv_name}/cgroup.procs"
 	else
-		cgroup_procs="/sys/fs/cgroup/openrc/${RC_SVCNAME}/tasks"
+		cgroup_procs="/sys/fs/cgroup/"${rc_cgroup_name}"/${RC_SVCNAME}/tasks"
 	fi
 	[ -f "${cgroup_procs}" ] || return 0
 	while read -r p; do
@@ -51,7 +53,7 @@ cgroup_running()
 {
 	[ -d "/sys/fs/cgroup/unified/${RC_SVCNAME}" ] ||
 			[ -d "/sys/fs/cgroup/${RC_SVCNAME}" ] ||
-			[ -d "/sys/fs/cgroup/openrc/${RC_SVCNAME}" ]
+			[ -d "/sys/fs/cgroup/"${rc_cgroup_name}"/${RC_SVCNAME}" ]
 }
 
 cgroup_set_values()
@@ -61,7 +63,7 @@ cgroup_set_values()
 	local controller h
 	controller="$1"
 	h=$(cgroup_find_path "$1")
-	cgroup="/sys/fs/cgroup/${1}${h}openrc_${RC_SVCNAME}"
+	cgroup="/sys/fs/cgroup/${1}${h}"${rc_cgroup_name}"_${RC_SVCNAME}"
 	[ -d "$cgroup" ] || mkdir -p "$cgroup"
 
 	set -- $2
@@ -108,7 +110,7 @@ cgroup_add_service()
 		[ -w "${d}"/tasks ] && printf "%d" 0 > "${d}"/tasks
 	done
 
-	openrc_cgroup=/sys/fs/cgroup/openrc
+	openrc_cgroup=/sys/fs/cgroup/"${rc_cgroup_name}"
 	if [ -d "$openrc_cgroup" ]; then
 		cgroup="$openrc_cgroup/$RC_SVCNAME"
 		mkdir -p "$cgroup"
@@ -167,7 +169,7 @@ cgroup2_remove()
 	local cgroup_path rc_cgroup_path
 	cgroup_path="$(cgroup2_find_path)"
 	[ -z "${cgroup_path}" ] && return 0
-	rc_cgroup_path="${cgroup_path}/openrc.${RC_SVCNAME}"
+	rc_cgroup_path="${cgroup_path}/${rc_cgroup_name}/${cg2_sv_name}"
 	[ ! -d "${rc_cgroup_path}" ] ||
 		[ ! -e "${rc_cgroup_path}"/cgroup.events ] &&
 		return 0
@@ -191,7 +193,7 @@ cgroup2_set_limits()
 	cgroup_path="$(cgroup2_find_path)"
 	[ -z "${cgroup_path}" ] && return 0
 	mountinfo -q "${cgroup_path}"|| return 0
-	rc_cgroup_path="${cgroup_path}/openrc.${RC_SVCNAME}"
+	rc_cgroup_path="${cgroup_path}/${rc_cgroup_name}/${cg2_sv_name}"
 	[ ! -d "${rc_cgroup_path}" ] && mkdir "${rc_cgroup_path}"
 	[ -f "${rc_cgroup_path}"/cgroup.procs ] &&
 		printf 0 > "${rc_cgroup_path}"/cgroup.procs
@@ -210,7 +212,7 @@ cgroup2_kill_cgroup() {
 	local cgroup_path
 	cgroup_path="$(cgroup2_find_path)"
 	[ -z "${cgroup_path}" ] && return 1
-	rc_cgroup_path="${cgroup_path}/openrc.${RC_SVCNAME}"
+	rc_cgroup_path="${cgroup_path}/${rc_cgroup_name}/${cg2_sv_name}"
 	if [ -f "${rc_cgroup_path}"/cgroup.kill ]; then
 		printf "%d" 1 > "${rc_cgroup_path}"/cgroup.kill
 	fi