#!/bin/sh

#

# chkconfig: 345 13 89

# description: Logs into iSCSI targets needed at system startup

#

### BEGIN INIT INFO

# Provides:          iscsi

# Required-Start:    $network $iscsid

# Required-Stop:     $network $iscsid

# Short-Description: Starts and stops login and scanning of iSCSI devices.

# Description: iscsi provides the iSCSI state machine for software iscsi/iser

#              and partial offloaded hardware. iscsi logs into and scans

#              for iSCSI devices, and shuts them down when stopped.

### END INIT INFO

#

# Source function library.

. /etc/init.d/functions

PATH=/sbin:/bin:/usr/sbin:/usr/bin

RETVAL=0

start()

{

	if [ -f /var/lock/subsys/iscsi ] ; then

		echo

		success

		return

	fi

	# Not sure if this is ok.

	# It was done for compatiblity where users were used to

	# just starting the iscsi service, but for root boot we

	# need need iscsid start earlier than the devices we

	# log into below.

	status iscsid

	RETVAL=$?

	if [ $RETVAL -ne 0 ]; then

		/etc/init.d/iscsid start

	fi

	# this script is normally called from startup so log into

	# nodes marked node.startup=automatic

	iscsiadm -m node --loginall=automatic

	touch /var/lock/subsys/iscsi

	success

	echo

}

cleanup_iscsi()

{

	/etc/init.d/iscsid stop

	rm -f /var/lock/subsys/iscsi

	success

}

stop()

{

	if [ ! -f /var/lock/subsys/iscsi ]; then

		echo

		success

		return

	fi

	declare -a iparams=( $(iscsiadm -m session 2>/dev/null | egrep "tcp|iser") )

	if [[ -z "${iparams[*]}" ]]; then

		# no sessions so we can just quit

		cleanup_iscsi

		return

	fi

	# don't turn off iscsi if root is possibly on a iscsi disk

	rootopts=$(awk '{ if ($1 !~ /^[ \t]*#/ && $2 == "/") { print $4; }}' /etc/mtab)

	if [[ "$rootopts" =~ "_netdev" ]] ; then

		echo $"Can not shutdown iSCSI. Root is on a iSCSI disk."

		exit 1

	fi

	iscsiadm -m node --logoutall=all

	cleanup_iscsi

}

case "$1" in

	start)

		start

		;;

	stop)

		stop

		;;

	restart)

		stop

		start

		;;

	status)

		status iscsid

		RETVAL=$?

		;;

	condrestart)

		[ -f /var/lock/subsys/iscsi ] && restart

		;;

	*)

		echo $"Usage: $0 {start|stop|restart|status|condrestart}"

		exit 1

esac

exit $RETVAL