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#!@SBINDIR@/openrc-run
# Copyright (c) 2007-2015 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 sys filesystem."
sysfs_opts=nodev,noexec,nosuid
depend()
{
keyword -docker -lxc -prefix -systemd-nspawn -vserver
}
mount_sys()
{
grep -Eq "[[:space:]]+sysfs$" /proc/filesystems || return 1
mountinfo -q /sys && return 0
if [ ! -d /sys ]; then
if ! mkdir -m 0755 /sys; then
ewarn "Could not create /sys!"
return 1
fi
fi
ebegin "Mounting /sys"
if ! fstabinfo --mount /sys; then
mount -n -t sysfs -o ${sysfs_opts} sysfs /sys
fi
eend $?
}
mount_misc()
{
# Setup Kernel Support for securityfs
if [ -d /sys/kernel/security ] && \
! mountinfo -q /sys/kernel/security; then
if grep -qs securityfs /proc/filesystems; then
ebegin "Mounting security filesystem"
mount -n -t securityfs -o ${sysfs_opts} \
securityfs /sys/kernel/security
eend $?
fi
fi
# Setup Kernel Support for debugfs
if [ -d /sys/kernel/debug ] && ! mountinfo -q /sys/kernel/debug; then
if grep -qs debugfs /proc/filesystems; then
ebegin "Mounting debug filesystem"
mount -n -t debugfs -o ${sysfs_opts} debugfs /sys/kernel/debug
eend $?
fi
fi
# Setup Kernel Support for configfs
if [ -d /sys/kernel/config ] && ! mountinfo -q /sys/kernel/config; then
if grep -qs configfs /proc/filesystems; then
ebegin "Mounting config filesystem"
mount -n -t configfs -o ${sysfs_opts} configfs /sys/kernel/config
eend $?
fi
fi
# set up kernel support for fusectl
if [ -d /sys/fs/fuse/connections ] \
&& ! mountinfo -q /sys/fs/fuse/connections; then
if grep -qs fusectl /proc/filesystems; then
ebegin "Mounting fuse control filesystem"
mount -n -t fusectl -o ${sysfs_opts} \
fusectl /sys/fs/fuse/connections
eend $?
fi
fi
# Setup Kernel Support for SELinux
if [ -d /sys/fs/selinux ] && ! mountinfo -q /sys/fs/selinux; then
if grep -qs selinuxfs /proc/filesystems; then
ebegin "Mounting SELinux filesystem"
mount -t selinuxfs selinuxfs /sys/fs/selinux
eend $?
fi
fi
# Setup Kernel Support for persistent storage
if [ -d /sys/fs/pstore ] && ! mountinfo -q /sys/fs/pstore; then
if grep -qs 'pstore$' /proc/filesystems; then
ebegin "Mounting persistent storage (pstore) filesystem"
mount -t pstore pstore -o ${sysfs_opts} /sys/fs/pstore
eend $?
fi
fi
# set up kernel support for efivarfs
if [ -d /sys/firmware/efi/efivars ] &&
! mountinfo -q /sys/firmware/efi/efivars; then
ebegin "Mounting efivarfs filesystem"
mount -n -t efivarfs -o ro \
efivarfs /sys/firmware/efi/efivars 2> /dev/null
eend 0
fi
}
cgroup1_base()
{
grep -qw cgroup /proc/filesystems || return 0
if ! mountinfo -q /sys/fs/cgroup; then
ebegin "Mounting cgroup filesystem"
local opts="${sysfs_opts},mode=755,size=${rc_cgroupsize:-10m}"
mount -n -t tmpfs -o "${opts}" cgroup_root /sys/fs/cgroup
eend $?
fi
if ! mountinfo -q /sys/fs/cgroup/openrc; then
local agent="@LIBEXECDIR@/sh/cgroup-release-agent.sh"
mkdir /sys/fs/cgroup/openrc
mount -n -t cgroup \
-o none,${sysfs_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 ] || return 0
while read -r name _ _ enabled rest; 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 "${sysfs_opts},${name}" \
"${name}" "/sys/fs/cgroup/${name}"
;;
esac
done < /proc/cgroups
return 0
}
cgroup2_controllers()
{
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()
{
grep -qw cgroup /proc/filesystems &&
grep -qw cgroup2 /proc/filesystems ||
return 0
cgroup1_base
mkdir /sys/fs/cgroup/unified
mount -t cgroup2 none -o "${sysfs_opts},nsdelegate" /sys/fs/cgroup/unified
cgroup2_controllers
cgroup1_controllers
return 0
}
cgroups_legacy()
{
grep -qw cgroup /proc/filesystems || return 0
cgroup1_base
cgroup1_controllers
return 0
}
cgroups_unified()
{
grep -qw cgroup2 /proc/filesystems || return 0
mount -t cgroup2 none -o "${sysfs_opts},nsdelegate" /sys/fs/cgroup
return 0
}
mount_cgroups()
{
# set up kernel support for cgroups
if [ -d /sys/fs/cgroup ]; then
case "${rc_cgroup_mode:-hybrid}" in
hybrid) cgroups_hybrid ;;
legacy) cgroups_legacy ;;
unified) cgroups_unified ;;
esac
fi
return 0
}
restorecon_sys()
{
if [ -x /sbin/restorecon ]; then
ebegin "Restoring SELinux contexts in /sys"
restorecon -F /sys/devices/system/cpu/online >/dev/null 2>&1
restorecon -rF /sys/fs/cgroup >/dev/null 2>&1
eend $?
fi
}
start()
{
mount_sys
mount_misc
mount_cgroups
restorecon_sys
return 0
}
|
