#!/sbin/runscript
# Copyright 1999-2011 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/sys-fs/zfs/files/zfs,v 0.9 2011/04/30 10:13:43 devsk Exp $

depend()
{
	before net
	after udev
	keyword -lxc -openvz -prefix -vserver
}

CACHEFILE=/etc/zfs/zpool.cache
ZPOOL=/usr/sbin/zpool
ZFS=/usr/sbin/zfs
ZFS_MODULE=zfs

checksystem() {
	if [ -c /dev/zfs ]; then
		einfo "ZFS modules already loaded"
		return 0
	else
		einfo "Checking if ZFS modules present"
		if [ "x$(modprobe -l  $ZFS_MODULE | grep $ZFS_MODULE)" == "x" ]; then
			eerror "$ZFS_MODULE not found. Is the ZFS package installed?"
			return 1
		fi
	fi
	einfo "Checking if zfs userspace tools present"
		if [ ! -x $ZPOOL ]; then
			eerror "$ZPOOL binary not found."
			return 1
		fi
		if [ ! -x $ZFS ]; then
			eerror "$ZFS binary not found."
			return 1
		fi
	return 0
}

start() {
	ebegin "Starting ZFS"
	checksystem || return 1

	# Delay until all required block devices are present.
	udevadm settle

	if [ ! -c /dev/zfs ]; then
		modprobe $ZFS_MODULE
		rv=$?
		if [ $rv -ne 0 ]; then
			eerror "Failed to load the $ZFS_MODULE module, check 'dmesg|tail'."
			eend $rv
			return $rv
		fi
	fi

	# Import all pools described by the cache file, and then mount
	# all filesystem based on their properties.
	if [ -f $CACHEFILE ]; then
		einfo "Importing ZFS pools"
		# as per fedora script, import can fail if all pools are already imported
		# The check for $rv makes no sense...but someday, it will work right.
		$ZPOOL import -c $CACHEFILE -aN 2>/dev/null || true
		rv=$?
		if [ $rv -ne 0 ]; then
			eerror "Failed to import not-yet imported pools."
			eend $rv
			return $rv
		fi
	fi

	einfo "Mounting ZFS filesystems"
	$ZFS mount -a
	rv=$?
	if [ $rv -ne 0 ]; then
		eerror "Failed to mount ZFS filesystems."
		eend $rv
		return $rv
	fi

	eend 0
	return 0
}

stop()
{
	ebegin "Unmounting ZFS filesystems"
	$ZFS umount -a
	rv=$?
	if [ $rv -ne 0 ]; then
		eerror "Failed to umount ZFS filesystems."
	fi

	eend $rv
}

status()
{
	# show pool status and list
	$ZPOOL status && echo && $ZPOOL list
}