#!/bin/sh
#
# chkconfig: - 39 35
# description: Starts and stops the iSCSI target
#
# pidfile: /var/run/ietd.pid
# config:  /etc/ietd.conf

### BEGIN INIT INFO
# Provides: iscsi-target
# Required-Start: $network
# Required-Stop: $network
# Default-Start: 3 4 5
# Short-Description: iSCSI target
# Description: iSCSI Enterprise Target is for building an iSCSI storage system on
#              Linux. It is aimed at developing an iSCSI target satisfying enterprise
#              requirements.
### END INIT INFO

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

PATH=/sbin:/bin:/usr/sbin:/usr/bin
MEM_SIZE=1048576
SERVICE="iSCSI target"

configure_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=0

start() {
	gprintf "Starting %s service: " "$SERVICE"
	configure_memsize
	modprobe -q crc32c
	modprobe iscsi_trgt
	daemon /usr/sbin/ietd
	RETVAL=$?
	if [ "$RETVAL" -eq "0" ]; then
		touch /var/lock/subsys/ietd
	fi
	echo
	return $RETVAL
}
	
stop() {
	gprintf "Shutting down %s service: " "$SERVICE"
	ietadm --op delete >/dev/null 2>/dev/null
	killproc ietd
	modprobe -r iscsi_trgt 2>/dev/null
	RETVAL=$?
	if [ "$RETVAL" -eq "0" ]; then
		rm -f /var/lock/subsys/ietd
	fi
	modprobe -r crc32c 2>/dev/null
	echo
	return $RETVAL
}

restart()
{
        stop
        start
}

condrestart()
{
	if [ -f /var/lock/subsys/ietd ]; then
		restart
	fi
}

case "$1" in
  start)
        start
		RETVAL=$?
        ;;
  stop)
        stop
		RETVAL=$?
        ;;
  restart)
        restart
		RETVAL=$?
        ;;
  condrestart)
        condrestart
		RETVAL=$?
        ;;
  status)
        status ietd
		RETVAL=$?
        ;;
  *)
        gprintf "Usage: %s {start|stop|restart|status}\n" "$SERVICE"
        exit 1
esac

exit $RETVAL