#!/bin/sh## chkconfig: - 39 35# description: Starts and stops the iSCSI target# debianized start-stop scriptPID_FILE=/var/run/iscsi_trgt.pidCONFIG_FILE=/etc/ietd.confDAEMON=/usr/sbin/ietdPATH=/sbin:/bin:/usr/sbin:/usr/bin# Don't touch this "memsize thingy" unless you are blessed# with knowledge about it.MEM_SIZE=1048576configure_memsize(){    if [ -e /proc/sys/net/core/wmem_max ]; then        echo ${MEM_SIZE} > /proc/sys/net/core/wmem_max    fi    if [ -e /proc/sys/net/core/rmem_max ]; then        echo ${MEM_SIZE} > /proc/sys/net/core/rmem_max    fi    if [ -e /proc/sys/net/core/wmem_default ]; then        echo ${MEM_SIZE} > /proc/sys/net/core/wmem_default    fi    if [ -e /proc/sys/net/core/rmem_default ]; then        echo ${MEM_SIZE} > /proc/sys/net/core/rmem_default    fi    if [ -e /proc/sys/net/ipv4/tcp_mem ]; then        echo "${MEM_SIZE} ${MEM_SIZE} ${MEM_SIZE}" > /proc/sys/net/ipv4/tcp_mem    fi    if [ -e  /proc/sys/net/ipv4/tcp_rmem ]; then        echo "${MEM_SIZE} ${MEM_SIZE} ${MEM_SIZE}" > /proc/sys/net/ipv4/tcp_rmem    fi    if [ -e /proc/sys/net/ipv4/tcp_wmem ]; then        echo "${MEM_SIZE} ${MEM_SIZE} ${MEM_SIZE}" > /proc/sys/net/ipv4/tcp_wmem    fi}RETVAL=0ietd_start(){	echo -n "Starting iSCSI enterprise target service: "	configure_memsize	modprobe -q crc32c	modprobe iscsi_trgt	start-stop-daemon --start --exec $DAEMON --quiet	RETVAL=$?	if [ $RETVAL == "0" ]; then	    echo "succeeded."	else	    echo "failed."	fi	    }	ietd_stop(){	echo -n "Removing iSCSI enterprise target devices: "	# ugly, but ietadm does not allways provides correct exit values	RETURN=`ietadm --op delete 2>&1`	RETVAL=$?	if [ $RETVAL == "0" ] && [[ $RETURN != "something wrong" ]]; then	    echo "succeeded."	else	    echo "failed with reason :$RETURN"	    exit 1	fi	echo -n "Stopping iSCSI enterprise target service: "	start-stop-daemon --stop --quiet --exec $DAEMON --pidfile $PID_FILE	RETVAL=$?	if [ $RETVAL == "0" ]; then	    echo "succeeded."	else	    echo "failed."	fi	# ugly, but pid file is not removed ba ietd	rm -f $PID_FILE	echo -n "Removing iSCSI enterprise target modules: "	modprobe -r iscsi_trgt	RETVAL=$?	modprobe -r crc32c 2>/dev/null	if [ $RETVAL == "0" ]; then	    echo "succeeded."	else	    echo "failed."	    exit 1	fi}case "$1" in  start)        ietd_start        ;;  stop)        ietd_stop        ;;  restart)        ietd_stop	sleep 1	ietd_start        ;;  status)	PID=`pidof ietd`	if [ $PID ]; then		echo "iSCSI enterprise target is running at pid $PID"	else		echo "no iSCSI enterprise target found!"		exit 1	fi	        ;;  dump)	DUMP=`tempfile -p ietd`	RETVAL=$?	if [ $RETVAL != "0" ]; then	    echo "Failed to create dump file $DUMP"	    exit 1	fi        ietadm --mode dump --all >$DUMP	RETVAL=$?	if [ $RETVAL != "0" ]; then	    echo "Error dumping config from daemon"	    rm $DUMP	    exit 1	fi	mv -u $DUMP $CONFIG_FILE	echo "Config dumped to $CONFIG_FILE"        ;;  *)        echo $"Usage: $0 {start|stop|restart|status|dump}"        exit 1esacexit 0