#!/sbin/runscript
# Copyright 1999-2005 Gentoo Foundation
# Distributed under the terms of the GNU General Public License, v2 or later
# $Header: /var/cvsroot/gentoo-x86/sys-cluster/gnbd/files/gnbd-srv.rc,v 1.4 2005/10/07 19:48:57 xmerlin Exp $

depend() {
	use dns logger
	need net
	need fenced
}

GNBD_SRV_TIMEOUT=5

start() {
	local GNBD
	
	if [ ! -f /etc/gnbdtab ] ; then
		eerror "Please create /etc/gnbdtab"
		eerror "Sample conf: /etc/gnbdtab"
		return 1
	fi
	
	ebegin "Loading needed kernel modules for gnbd"
	modprobe gnbd
	eend $? "Failed to load needed kernel modules for gnbd"

	ebegin "Starting gnbd_serv"
	start-stop-daemon --start --quiet --exec /sbin/gnbd_serv -- -q
	eend $? "Failed to start gnbd_serv"	
	
	GNBD=`cat /etc/gnbdtab | egrep '^export'`
	if [ -n "$GNBD" ] ; then
		ebegin "Exporting all GNBDs devices"
		einfo "$(awk '/^export/ { print "--> device:", $4, "as", $3 }' /etc/gnbdtab )"
		cat /etc/gnbdtab | awk '/^export/ { print "-d", $4, "-e", $3 }' | xargs -l gnbd_export ${GNBD_SRV_OPTS} > /dev/null
		eend $? "Failed to export gnbd devices"
	fi
}

stop() {

	local GNBD_SRV_PROCS GNBD_CLUSTERD_PROC

	ebegin "Unexporting all GNBDs devices"
	gnbd_export -q -R &> /dev/null
	eend $?

	if [ "$?" -ne 0 ]
	then
		ewend 1 "Failed to unexport all gnbd devices"
	else
		eend 0
		
	fi
	
	ebegin "Stopping gnbd_serv"

	GNBD_SRV_PROCS="$(pgrep gnbd_serv)"
	while [ -n "${GNBD_SRV_PROCS}" ] && [ ${GNBD_SRV_TIMEOUT} -gt 0 ] ; do
		gnbd_serv -k &> /dev/null
		sleep 1
		GNBD_SRV_TIMEOUT=$(( ${GNBD_SRV_TIMEOUT}-1 ))
		GNBD_SRV_PROCS="$(pgrep gnbd_serv)"
	done
	
	if [ -n "${GNBD_SRV_PROCS}" ]; then
		gnbd_serv -K &> /dev/null
	fi
	eend $? "Failed to stop gnbd_serv"
	
	GNBD_CLUSTERD_PROC="$(pgrep gnbd_clusterd)"
	if [ -n "${GNBD_CLUSTERD_PROC}" ]; then
		ebegin "Stopping gnbd_clusterd"
		killall gnbd_clusterd &> /dev/null
		eend $?
	fi
	
	ebegin "Unloading gnbd kernel module"
	modprobe -r gnbd
	eend $? "Failed to unload gnbd kernel module"
}