#!/bin/sh
#
# OCF RA for OCFS2 on DRBD
#
# Copyright (c) 2008,2009 Barton IT-Consulting
# Copyright (c) 2004 SUSE LINUX AG, Lars Marowsky-Brée
#                    All Rights Reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of version 2 of the GNU General Public License as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it would be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
#
# Further, this software is distributed without any warranty that it is
# free of the rightful claim of any third person regarding infringement
# or the like.  Any license provided herein, whether implied or
# otherwise, applies only to this software file.  Patent licenses, if
# any, provided herein do not apply to combinations of this program with
# other software, or any other product whatsoever.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write the Free Software Foundation,
# Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
#

# Initialization:
. ${OCF_ROOT}/resource.d/heartbeat/.ocf-shellfuncs

# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

meta_data() {
	cat <<END
<?xml version="1.0"?>
<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
<resource-agent name="OCFS2_DRBD">
<version>1.5</version>

<longdesc lang="en">
This Resource Agent starts and stops OCFS2 file systems located on DRBD devices.
</longdesc>
<shortdesc lang="en">OCFS2 on DRBD resource agent</shortdesc>

<parameters>
<parameter name="drbd" unique="1">
<longdesc lang="en">ID of the DRBD resource</longdesc>
<shortdesc lang="en">ID of the DRBD resource</shortdesc>
<content type="string" default="" />
</parameter>
<parameter name="drbd_dev" unique="1">
<longdesc lang="en">DRBD device</longdesc>
<shortdesc lang="en">DRBD device</shortdesc>
<content type="string" default="" />
</parameter>
<parameter name="mountpoint" unique="1">
<longdesc lang="en">Mountpoint for OCFS2 filesystem</longdesc>
<shortdesc lang="en">Mountpoint for OCFS2 filesystem</shortdesc>
<content type="string" default="" />
</parameter>
<parameter name="reload_cron" unique="1">
<longdesc lang="en">Reload CRON configuration after mounting OCFS2 filesystem</longdesc>
<shortdesc lang="en">Reload CRON configuration</shortdesc>
<content type="boolean" default="0" />
</parameter>
</parameters>

<actions>
<action name="start" timeout="90" />
<action name="stop" timeout="90" />
<action name="monitor" timeout="20" interval="30" depth="0" start-delay="10" />
<action name="meta-data" timeout="5" />
<action name="validate-all" timeout="30" />
</actions>
</resource-agent>
END
}

# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

ClusterFS_usage() {
	echo "usage: $0 {start|stop|monitor|validate-all|meta-data}"
}

ClusterFS_start() {
	mkdir -p "$OCF_RESKEY_mountpoint"
	drbdadm primary "$OCF_RESKEY_drbd"
	if [ $? -ne 0 ]; then
		return $OCF_ERR_GENERIC
	fi
	mount -t ocfs2 -o noatime \
		"$OCF_RESKEY_drbd_dev" "$OCF_RESKEY_mountpoint"
	if [ $? -ne 0 ]; then
		return $OCF_ERR_GENERIC
	fi
	if [ "$OCF_RESKEY_reload_cron" = "1" ]; then
		[ -d /etc/cron.d ] && touch /etc/cron.d
	fi
	return $OCF_SUCCESS
}

ClusterFS_stop() {
	mount | grep "$OCF_RESKEY_drbd_dev on " >/dev/null
	if [ $? -eq 0 ]; then
		umount "$OCF_RESKEY_mountpoint"
		if [ $? -ne 0 ]; then
			# try harder, kill processes on this filesystem
			pids=$(ps ax|awk "{print \$1}"|grep -v PID)
			for p in $pids; do
				lsof -p $p -n | grep " $OCF_RESKEY_mountpoint" \
				 >/dev/null 2>&1
				[ $? -eq 0 ] || continue
				kill $p
			done
			sleep 3
			pids=$(ps ax|awk "{print \$1}"|grep -v PID)
			for p in $pids; do
				lsof -p $p -n | grep " $OCF_RESKEY_mountpoint" \
				 >/dev/null 2>&1
				[ $? -eq 0 ] || continue
				kill -9 $p
			done
			sleep 1
			umount "$OCF_RESKEY_mountpoint"
			if [ $? -ne 0 ]; then
				return $OCF_ERR_GENERIC
			fi
		fi
	fi
	drbdadm secondary "$OCF_RESKEY_drbd"
	if [ "$OCF_RESKEY_reload_cron" = "1" ]; then
		[ -d /etc/cron.d ] && touch /etc/cron.d
	fi
	return $OCF_SUCCESS
}

ClusterFS_monitor() {
	mount | grep "$OCF_RESKEY_drbd_dev on " >/dev/null
	if [ $? -eq 0 ]; then
		return $OCF_SUCCESS
	fi
	return $OCF_NOT_RUNNING
}

ClusterFS_validate() {
	if [ -z "$OCF_RESKEY_drbd" ]; then
		return $OCF_ERR_ARGS
	fi
	if [ -z "$OCF_RESKEY_drbd_dev" ]; then
		return $OCF_ERR_ARGS
	fi
	if [ -z "$OCF_RESKEY_mountpoint" ]; then
		return $OCF_ERR_ARGS
	fi
	return $OCF_SUCCESS
}

case $__OCF_ACTION in
	meta-data)
		meta_data
		exit $OCF_SUCCESS
		;;
	start)
		ClusterFS_start
		;;
	stop)
		ClusterFS_stop
		;;
	monitor)
		ClusterFS_monitor
		;;
	validate-all)
		ClusterFS_validate
		;;
	usage|help)
		ClusterFS_usage
		exit $OCF_SUCCESS
		;;
	*)
		ClusterFS_usage
		exit $OCF_ERR_UNIMPLEMENTED
		;;
esac

rc=$?
ocf_log debug "${OCF_RESOURCE_INSTANCE} $__OCF_ACTION : $rc"
exit $rc

# -eof-