#!/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: $local_fs
# Required-Stop: $local_fs
# 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

# Source function library.
. /etc/rc.d/init.d/functions

# Source zfs configuration.
[ -f /etc/sysconfig/zfs ] &&  . /etc/sysconfig/zfs

RETVAL=0

LOCKFILE=/var/lock/subsys/zfs
CACHEFILE=/etc/zfs/zpool.cache
ZPOOL=/usr/sbin/zpool
ZFS=/usr/sbin/zfs

[ -x $ZPOOL ] || exit 1
[ -x $ZFS ] || exit 2

start()
{
	[ -f $LOCKFILE ] && return 3

	# 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 4
	fi

	# Load the zfs module stack
	/sbin/modprobe zfs

	# Ensure / exists in /etc/mtab, if not update mtab accordingly.
	# This should be handled by rc.sysinit but lets be paranoid.
	awk '$2 == "/" { exit 1 }' /etc/mtab
	RETVAL=$?
	if [ $RETVAL -eq 0 ]; then
		/bin/mount -f /
	fi

	# Import all pools described by the cache file, and then mount
	# all filesystem based on their properties.
        if [ -f $CACHEFILE ] ; then
		action $"Importing ZFS pools: " \
			$ZPOOL import -c $CACHEFILE -aN 2>/dev/null
		action $"Mounting ZFS filesystems: " \
			$ZFS mount -a
	fi
	
	touch $LOCKFILE
}

stop()
{
	[ ! -f $LOCKFILE ] && return 3

	action $"Unmounting ZFS filesystems: " $ZFS umount -a

	rm -f $LOCKFILE
}

status()
{
	[ ! -f $LOCKFILE ] && return 3

	$ZPOOL status && echo && $ZPOOL list
}

case "$1" in
	start)
		start
		RETVAL=$?
		;;
	stop)
		stop
		RETVAL=$?
		;;
	status)
		status
		RETVAL=$?
		;;
	restart)
		stop
		start
		;;
	condrestart)
		if [ -f $LOCKFILE ]; then
			stop
			start
		fi
		;;
	*)
		echo $"Usage: $0 {start|stop|status|restart|condrestart}"
		;;
esac

exit $RETVAL