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|
#!/bin/bash
#
# zfs This script will mount/umount the zfs filesystems.
#
# chkconfig: 2345 01 99
# description: This script will mount/umount the zfs filesystems during
# system boot/shutdown. Configuration of which filesystems
# should be mounted is handled by the zfs 'mountpoint' and
# 'canmount' properties. See the zfs(8) man page for details.
# It is also responsible for all userspace zfs services.
#
### BEGIN INIT INFO
# Provides: zfs
# Required-Start:
# Required-Stop:
# Should-Start:
# Should-Stop:
# Default-Start: 2 3 4 5
# Default-Stop: 1
# Short-Description: Mount/umount the zfs filesystems
# Description: ZFS is an advanced filesystem designed to simplify managing
# and protecting your data. This service mounts the ZFS
# filesystems and starts all related zfs services.
### END INIT INFO
export PATH=/usr/local/sbin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin
# Source function library & LSB routines
. /etc/rc.d/init.d/functions
# script variables
RETVAL=0
ZPOOL=zpool
ZFS=zfs
servicename=zfs
LOCKFILE=/var/lock/subsys/$servicename
# functions
zfs_installed() {
modinfo zfs > /dev/null 2>&1 || return 5
$ZPOOL > /dev/null 2>&1
[ $? == 127 ] && return 5
$ZFS > /dev/null 2>&1
[ $? == 127 ] && return 5
return 0
}
reregister_mounts() {
cat /etc/mtab | while read -r fs mntpnt fstype opts rest ; do
fs=`printf '%b\n' "$fs"`
mntpnt=`printf '%b\n' "$mntpnt"`
if [ "$fstype" == "zfs" ] ; then
if [ "$mntpnt" == "/" ] ; then
mount -f -o zfsutil -t zfs --move / /removethismountpointhoweverpossible
umount --fake /removethismountpointhoweverpossible
else
umount --fake "$mntpnt"
fi
elif echo "$fs" | grep -q "^/dev/zd" ; then
if [ "$mntpnt" == "/" ] ; then
mount -f -t "$fstype" --move / /removethismountpointhoweverpossible
umount --fake /removethismountpointhoweverpossible
else
umount --fake "$mntpnt"
fi
fi
done
cat /proc/mounts | while read -r fs mntpnt fstype opts rest ; do
fs=`printf '%b\n' "$fs"`
mntpnt=`printf '%b\n' "$mntpnt"`
if [ "$fstype" == "zfs" ] ; then
mount -f -t zfs -o zfsutil "$fs" "$mntpnt"
elif echo "$fs" | grep -q "^/dev/zd" ; then
mount -f -t "$fstype" -o "$opts" "$fs" "$mntpnt"
fi
done
}
# i need a bash guru to simplify this, since this is copy and paste, but donno how
# to correctly dereference variable names in bash, or how to do this right
declare -A MTAB
declare -A FSTAB
# first parameter is a regular expression that filters mtab
read_mtab() {
for fs in "${!MTAB[@]}" ; do unset MTAB["$fs"] ; done
while read -r fs mntpnt fstype opts blah ; do
fs=`printf '%b\n' "$fs"`
MTAB["$fs"]=$mntpnt
done < <(grep "$1" /etc/mtab)
}
in_mtab() {
[ "${MTAB[$1]}" != "" ]
return $?
}
# first parameter is a regular expression that filters fstab
read_fstab() {
for fs in "${!FSTAB[@]}" ; do unset FSTAB["$fs"] ; done
while read -r fs mntpnt fstype opts blah ; do
fs=`printf '%b\n' "$fs"`
FSTAB["$fs"]=$mntpnt
done < <(grep "$1" /etc/fstab)
}
in_fstab() {
[ "${FSTAB[$1]}" != "" ]
return $?
}
start()
{
if [ -f "$LOCKFILE" ] ; then return 0 ; fi
# check if ZFS is installed. If not, comply to FC standards and bail
zfs_installed || {
action $"Checking if ZFS is installed: not installed" /bin/false
return 5
}
# Requires selinux policy which has not been written.
if [ -r "/selinux/enforce" ] &&
[ "$(cat /selinux/enforce)" = "1" ]; then
action $"SELinux ZFS policy required: " /bin/false || return 6
fi
# load kernel module infrastructure
if ! grep -q zfs /proc/modules ; then
action $"Loading kernel ZFS infrastructure: " modprobe zfs || return 5
fi
# fix mtab to include already-mounted fs filesystems, in case there are any
# we ONLY do this if mtab does not point to /proc/mounts
# which is the case in some systems (systemd may bring that soon)
if ! readlink /etc/mtab | grep -q /proc ; then
if grep -qE "(^/dev/zd| zfs )" /proc/mounts ; then
action $"Registering already-mounted ZFS filesystems and volumes: " reregister_mounts || return 150
fi
fi
if [ -f /etc/zfs/zpool.cache ] ; then
echo -n $"Importing ZFS pools not yet imported: "
$ZPOOL import -c /etc/zfs/zpool.cache -aN || true # stupid zpool will fail if all pools are already imported
RETVAL=$?
if [ $RETVAL -ne 0 ]; then
failure "Importing ZFS pools not yet imported: "
return 151
fi
success "Importing ZFS pools not yet imported: "
fi
action $"Mounting ZFS filesystems not yet mounted: " $ZFS mount -a || return 152
read_mtab "^/dev/zd"
read_fstab "^/dev/zd"
template=$"Mounting volume %s registered in fstab: "
for volume in "${!FSTAB[@]}" ; do
if in_mtab "$volume" ; then continue ; fi
string=`printf "$template" "$volume"`
action "$string" mount "$volume"
done
touch "$LOCKFILE"
}
stop()
{
if [ ! -f "$LOCKFILE" ] ; then return 0 ; fi
# check if ZFS is installed. If not, comply to FC standards and bail
zfs_installed || {
action $"Checking if ZFS is installed: not installed" /bin/false
return 5
}
# the poweroff of the system takes care of this
# but it never unmounts the root filesystem itself
# shit
action $"Syncing ZFS filesystems: " sync
# about the only thing we can do, and then we
# hope that the umount process will succeed
# unfortunately the umount process does not dismount
# the root file system, there ought to be some way
# we can tell zfs to just flush anything in memory
# when a request to remount,ro comes in
#echo -n $"Unmounting ZFS filesystems: "
#$ZFS umount -a
#RETVAL=$?
#if [ $RETVAL -ne 0 ]; then
# failure
# return 8
#fi
#success
rm -f "$LOCKFILE"
}
# See how we are called
case "$1" in
start)
start
RETVAL=$?
;;
stop)
stop
RETVAL=$?
;;
status)
lsmod | grep -q zfs || RETVAL=3
$ZPOOL status && echo && $ZFS list || {
[ -f "$LOCKFILE" ] && RETVAL=2 || RETVAL=4
}
;;
restart)
stop
start
;;
condrestart)
if [ -f "$LOCKFILE" ] ; then
stop
start
fi
;;
*)
echo $"Usage: $0 {start|stop|status|restart|condrestart}"
RETVAL=3
;;
esac
exit $RETVAL
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