#!/bin/sh

#

# iscsi: log into iSCSI targets

#

# chkconfig: 345 13 89

# description: Logs into iSCSI targets needed at system startup

### BEGIN INIT INFO

# Provides:          iscsi

# Required-Start:    iscsid network

# Should-Start:      tgtd

# Required-Stop:     iscsid

# Should-Stop:       tgtd

# Default-Start: 3 4 5

# Default-Stop: 0 1 2 6

# 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/rc.d/init.d/functions

exec="/sbin/iscsiadm"

prog="iscsi"

config="/etc/iscsi/initiatorname.iscsi"

lockfile=/var/lock/subsys/$prog

iscsid_lockfile=/var/lock/subsys/${prog}_iscsid

start() {

    [ -x $exec ] || exit 5

    [ -f $config ] || exit 6

    # if the network isn't up yet exit cleanly, NetworkManager will call us

    # again when the network is up

    [ ! -f /var/lock/subsys/network ] && ! nm-online -x >/dev/null 2>&1 && exit 3

    # this script is normally called from startup so log into

    # nodes marked node.startup=automatic

    echo -n $"Starting $prog: "

    $exec -m node --loginall=automatic 2>&1 > /dev/null | grep iscsiadm

    # Ignore return code, because this command attempts to log into

    # multiple sessions and some sessions could get logged into and

    # some could be down temporarily.

    success $"Starting $prog"

    touch $lockfile

    echo

    return 0

}

iscsi_sessions_running() {

    declare -a iparams=( $(iscsiadm -m session 2>/dev/null | egrep "tcp|iser|bnx2i|be2iscsi|cxgb3i|cxgb4i") )

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

        # no sessions

        return 2

    fi

    return 0

}

cleanup_successful_stop() {

    success $"Stopping $prog"

    rm -f $lockfile

    echo

}

stop() {

    # 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."

        # Just clean up lock file if this is a system shutdown/reboot.

        if [ "$RUNLEVEL" = "6" -o "$RUNLEVEL" = "0" -o "$RUNLEVEL" = "1" ]; then

            rm -f $lockfile

        fi

        exit 1

    fi

    echo -n $"Stopping $prog: "

    if ! iscsi_sessions_running ; then

        cleanup_successful_stop

        return 0

    fi

    if [ "$RUNLEVEL" = "6" -o "$RUNLEVEL" = "0" -o "$RUNLEVEL" = "1" ]; then

        $exec -m node --logoutall=all 2>&1 > /dev/null

    else

        $exec -m node --logoutall=automatic 2>&1 > /dev/null

    fi

    ret=$?

    # ignore ISCSI_ERR_NO_OBJS_FOUND/21

    if [[ "$ret" -ne 0 && "$ret" -ne 21 ]]; then

        failure $"Stopping $prog"

        echo

        return 1

    fi

    cleanup_successful_stop

    return 0

}

restart() {

    stop

    start

}

reload() {

    return 3

}

force_reload() {

    restart

}

rh_status() {

    [ -f $lockfile ] || { echo $"$prog is stopped" ; return 3 ; }

    declare -a iparams=( $(iscsiadm -m session 2>/dev/null | egrep "tcp|iser|bnx2i|be2iscsi|cxgb3i|cxgb4i") )

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

        # no sessions

	echo $"No active sessions"

        return 2

    fi

    iscsiadm -m session -P 3

    return 0

}

rh_status_q() {

    rh_status >/dev/null 2>&1

}

case "$1" in

    start)

        rh_status_q && exit 0

        $1

        ;;

    stop)

        $1

        ;;

    restart)

        $1

        ;;

    reload)

        rh_status_q || exit 7

        $1

        ;;

    force-reload)

        force_reload

        ;;

    status)

        rh_status

        ;;

    condrestart|try-restart)

        rh_status_q || exit 0

        restart

        ;;

    *)

        echo $"Usage: $0

{start|stop|status|restart|condrestart|try-restart|reload|force-reload}"

        exit 2

esac

exit $?