#!/bin/sh
#
### BEGIN INIT INFO
# Provides:          lvm cluster locking daemon
# Required-Start:    lvm2
# Required-Stop:     lvm2
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: start and stop the lvm cluster locking daemon
### END INIT INFO
#
# Author: Frederik Schüler <fs@debian.org>
# based on the old clvm init script from etch
# and the clvmd init script from RHEL5

PATH=/sbin:/usr/sbin:/bin:/usr/bin
DESC="Cluster LVM Daemon"
NAME=clvm
DAEMON=/sbin/clvmd
SCRIPTNAME=/etc/init.d/clvm

[ -x $DAEMON ] || exit 0

. /lib/init/vars.sh

. /lib/lsb/init-functions

CLVMDTIMEOUT=20

# Read configuration variable file if it is present
[ -r /etc/default/$NAME ] && . /etc/default/$NAME

DAEMON_OPTS="-T$CLVMDTIMEOUT"

do_start()
{
	start-stop-daemon --start --quiet --exec $DAEMON -- $DAEMON_OPTS || status="$?"
	# flush cache
	vgscan > /dev/null 2>&1 
	return $status
}

do_activate()
{
	if [ -n "$LVM_VGS" ] ; then
		log_action_msg  "Activating VGs $LVM_VGS"
		vgchange -ayl $LVM_VGS || return $?
	else
		log_action_msg  "Activating all VGs"
		vgchange -ayl || return $?
	fi
}

do_deactivate()
{
	if [ -n "$LVM_VGS" ] ; then
		vgs="$LVM_VGS"
	else
		# Hack to only deactivate clustered volumes
		vgs=$(vgdisplay -C -o vg_name,vg_attr --noheadings 2> /dev/null | awk '($2 ~ /.....c/) {print $1}')
	fi

	[ "$vgs" ] || return 0

	vgchange -anl $vgs || return $?
}

do_stop()
{
	start-stop-daemon --stop --quiet --name clvmd
	status=$?
	return $status
}

case "$1" in
  	start)
		# start the daemon...
		log_daemon_msg "Starting $DESC" "$NAME"
		do_start
		status=$?
		case "$status" in
			0) log_end_msg 0 ;;
			1) log_action_msg " already running" ; log_end_msg 0 ;;
			*) log_end_msg 1 ;;
		esac
		# and activate clustered volume groups
		do_activate
		status=$?
		exit $status
	;;
	stop)
		# deactivate volumes...
		log_daemon_msg "Deactivating VG $vg:"
		do_deactivate
		status=$?
		case "$status" in
			0) log_end_msg 0 ;;
			1) log_end_msg 0 ;;
			*) log_end_msg 1 ;;
		esac
		# and stop the daemon
		log_daemon_msg "Stopping $DESC" "$NAME"
		do_stop
		status=$?
		case "$status" in
			0) log_end_msg 0 ; exit 0 ;;
			1) log_end_msg 0 ; exit 0 ;;
			*) log_end_msg 1 ; exit $status ;;
		esac
	;;
	restart|force-reload)
		$0 stop
		sleep 1
		$0 start
	;;
	status)
		pid=$( pidof $DAEMON )
		if [ -n "$pid" ] ; then
			log_action_msg "$DESC is running" 
		else
			log_action_msg "$DESC is not running"
		fi
		exit 0
	;;
	*)
		echo "Usage: $SCRIPTNAME {start|stop|restart|force-reload|status}" >&2
		exit 1
	;;
esac

exit 0