#!/bin/sh
#
# chkconfig: 345 13 87
# description: Starts and stops the iSCSI initiator
#
# pidfile: /var/run/iscsid.pid
# config:  /etc/iscsid.conf
# processname: iscsid

### BEGIN INIT INFO
# Provides: open-iscsi
# Required-Start: $network
# Required-Stop: $network
# Default-Start: 3 4 5
# Short-Description: iSCSI initiator
# Description: Starts and stops the iSCSI initiator
### END INIT INFO

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

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

ISCSID=`which iscsid`
ISCSIADM=`which iscsiadm`

if [ -z "$ISCSID" -o -z "$ISCSIADM" ]; then
	gprintf "open-iscsi not installed.\n"
	exit 1
fi

start_iscsid()
{
	modprobe -q iscsi_tcp
	modprobe -q ib_iser
	daemon $ISCSID
	return $?
}

attach_nodes()
{
	gprintf "Attaching nodes: "
	$ISCSIADM -m node --loginall=automatic
	# failure to attach a node is not a failure of starting the service
	if [ "$?" -eq "0" ]; then
		echo_success
	else
		echo_failure
	fi
	return 0
}

detach_nodes()
{
	sync
	gprintf "Detaching nodes: "
	$ISCSIADM -m node --logoutall=all
	if [ "$?" -eq "0" ]; then
		echo_success
	else
		echo_failure
	fi
	echo
	return 0
}
    
stop_iscsid()
{
	# XXX - the pid file only has one pid, but we have two daemons
	killall -HUP `basename $ISCSID`
	RETVAL=$?
	modprobe -r iscsi_tcp 2>/dev/null
	modprobe -r ib_iser 2>/dev/null
	return $RETVAL
}

start()
{
	RETVAL=0
	gprintf "Starting %s service: " "iSCSI initiator"
	PID=`pidofproc $ISCSID`
	if [ -z $PID ]; then
		start_iscsid
	fi
	if [ $RETVAL == "0" ]; then
		echo_success
		echo
		touch /var/lock/subsys/open-iscsi
		attach_nodes
	else
		echo_failure
	fi
	echo
	return $RETVAL
}

stop()
{
	RETVAL=0
	PID=`pidofproc $ISCSID`
	RETVAL=$?
	if [ -n "$PID" ]; then
		detach_nodes
	fi
	gprintf "Stopping %s service: " "iSCSI initiator"
	if [ -n "$PID" ]; then
		stop_iscsid
		RETVAL=$?
	fi
	if [ "$RETVAL" == "0" ]; then
		echo_success
		rm -f /var/lock/subsys/open-iscsi
		rm -f /var/run/iscsid.pid
	else
		echo_failure
	fi
	echo
	return $RETVAL
}

restart()
{
	stop
	start
	return $?
}

case "$1" in
  start)
	start
	RETVAL=$?
	;;
  stop)
	stop
	RETVAL=$?
	;;
  restart)
	restart
	RETVAL=$?
	;;
  status)
	status `basename $ISCSID`
	RETVAL=$?
	if [ "$RETVAL" -eq "0" ]; then
		gprintf "Active sessions:\n"
		$ISCSIADM -m session
	fi
	;;
  *)
	gprintf "Usage: %s {start|stop|restart|status}\n" "open-iscsi"
	exit 1
esac

exit $RETVAL