#!/sbin/runscript
# Copyright 1999-2011 Gentoo Foundation
# Released under the 2-clause BSD license.
# $Header: /var/cvsroot/gentoo-x86/sys-fs/zfs/files/zfs,v 0.9 2011/04/30 10:13:43 devsk Exp $

if [ -z "$init" ]; then
    # Not interactive
    grep -qE '(^|[^\\](\\\\)* )zfs=(off|no)( |$)' /proc/cmdline && exit 3
fi

depend()
{
	# Try to allow people to mix and match fstab with ZFS in a way that makes sense.
	if [ "$(mountinfo -s /)" = 'zfs' ]
	then
		before localmount
	else
		after localmount
	fi

	# bootmisc will log to /var which may be a different zfs than root.
	before bootmisc logger
	use mtab
	keyword -lxc -openvz -prefix -vserver
}

ZFS="@sbindir@/zfs"
ZPOOL="@sbindir@/zpool"
ZPOOL_CACHE="@sysconfdir@/zfs/zpool.cache"
ZFS_MODULE=zfs

checksystem() {
	if [ ! -c /dev/zfs ]; then
		einfo "Checking if ZFS modules present"
		if ! modinfo zfs > /dev/null 2>&1 ; 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 $ZPOOL_CACHE ]; 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 $ZPOOL_CACHE -aN 2>/dev/null || true
		rv=$?
		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

	einfo "Exporting ZFS filesystems"
	$ZFS share -a
	rv=$?
	if [ $rv -ne 0 ]; then
		eerror "Failed to export 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
		einfo "Some ZFS filesystems not unmounted"
	fi

	# Don't fail if we couldn't umount everything.  /usr might be in use.
	eend 0
	return 0
}

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