[stgt] [RFC] example init.d script for tgtd

[Tomasz Chmielewski]

FUJITA Tomonori schrieb:

(...)


> As I wrote, having scripts/init.d/tgt.example is fine by me as long as
> the example is good.
> 
> Anyone has comments on this script?
> 
> One comment from me is that with the latest git tree, we can remove
> 'sleep' trick in the start section.

As I see, "sleep" can be removed from restart sections too.


Signed-off-by: Tomasz Chmielewski <mangoo at wpkg.org> 


#!/bin/sh

# This is an example init.d script for stopping/starting/reconfiguring tgtd.

TGTD_CONFIG=/etc/tgt/targets.conf

TASK=$1

start()
{
	echo "Starting target framework daemon"
	# Start tgtd first.
	tgtd &>/dev/null
	RETVAL=$?
	if [ "$RETVAL" -ne 0 ] ; then
	    echo "Could not start tgtd (is tgtd already running?)"
	    exit 1
	fi
	# Put tgtd into "offline" state until all the targets are configured.
	# We don't want initiators to (re)connect and fail the connection
	# if it's not ready.
	tgtadm --op update --mode sys --name State -v offline
	# Configure the targets.
	tgt-admin -e -c $TGTD_CONFIG
	# Put tgtd into "ready" state.
	tgtadm --op update --mode sys --name State -v ready
}

stop()
{
	if [ "$RUNLEVEL" == 0 -o "$RUNLEVEL" == 6 ] ; then
	    forcedstop
	fi
	echo "Stopping target framework daemon"
	# Remove all targets. It only removes targets which are not in use.
	tgt-admin --update ALL -c /dev/null &>/dev/null
	# tgtd will exit if all targets were removed
	tgtadm --op delete --mode system &>/dev/null
	RETVAL=$?
	if [ "$RETVAL" -eq 107 ] ; then
	    echo "tgtd is not running"
	    [ "$TASK" != "restart" ] && exit 1
	elif [ "$RETVAL" -ne 0 ] ; then
	    echo "Some initiators are still connected - could not stop tgtd"
	    exit 2
	fi
	echo -n
}

forcedstop()
{
	# NOTE: Forced shutdown of the iscsi target may cause data corruption
	# for initiators that are connected.
	echo "Force-stopping target framework daemon"
	# Offline everything first. May be needed if we're rebooting, but
	# expect the initiators to reconnect cleanly when we boot again
	# (i.e. we don't want them to reconnect to a tgtd which is still
	# working, but the target is gone).
	tgtadm --op update --mode sys --name State -v offline &>/dev/null
	RETVAL=$?
	if [ "$RETVAL" -eq 107 ] ; then
	    echo "tgtd is not running"
	    [ "$TASK" != "restart" ] && exit 1
	else
	    tgt-admin --offline ALL
	    # Remove all targets, even if they are still in use.
	    tgt-admin --update ALL -c /dev/null -f
	    # It will shut down tgtd only after all targets were removed.
	    tgtadm --op delete --mode system
	    RETVAL=$?
	    if [ "$RETVAL" -ne 0 ] ; then
		echo "Failed to shutdown tgtd"
		exit 1
	    fi
	fi
	echo -n
}

reload()
{
	echo "Updating target framework daemon configuration"
	# Update configuration for targets. Only targets which
	# are not in use will be updated.
	tgt-admin --update ALL -c $TGTD_CONFIG &>/dev/null
	RETVAL=$?
	if [ "$RETVAL" -eq 107 ] ; then
	    echo "tgtd is not running"
	    exit 1
	fi
}

forcedreload()
{
	echo "Force-updating target framework daemon configuration"
	# Update configuration for targets, even those in use.
	tgt-admin --update ALL -f -c $TGTD_CONFIG &>/dev/null
	RETVAL=$?
	if [ "$RETVAL" -eq 107 ] ; then
	    echo "tgtd is not running"
	    exit 1
	fi
}

status()
{
	# Don't name this script "tgtd"...
	TGTD_PROC=$(ps -C tgtd | grep -c tgtd)
	if [ "$TGTD_PROC" -eq 2 ] ; then
	    echo "tgtd is running. Run 'tgt-admin -s' to see detailed target info."
	else
	    echo "tgtd is NOT running."
	fi
}

case $1 in
	start)
		start
  		;;
	stop)
		stop
  		;;
	forcedstop)
		forcedstop
  		;;
	restart)
		TASK=restart
		stop && start
  		;;
	forcedrestart)
		TASK=restart
		forcedstop && start
		;;
	reload)
		reload
		;;
	forcedreload)
		forcedreload
		;;
	status)
		status
		;;
	*)
		echo "Usage: $0 {start|stop|forcedstop|restart|forcedrestart|reload|forcedreload|status}"
		exit 2
		;;
esac



-- 
Tomasz Chmielewski
http://wpkg.org


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