#!/bin/bash
#
# Copyright (c) 2014 Anand Subramanian anands@redhat.com
# Copyright (c) 2015 Red Hat Inc.
#                    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:
: ${OCF_FUNCTIONS_DIR=${OCF_ROOT}/lib/heartbeat}
. ${OCF_FUNCTIONS_DIR}/ocf-shellfuncs

if [ -n "$OCF_DEBUG_LIBRARY" ]; then
    . $OCF_DEBUG_LIBRARY
else
    : ${OCF_FUNCTIONS_DIR=${OCF_ROOT}/lib/heartbeat}
. ${OCF_FUNCTIONS_DIR}/ocf-shellfuncs
fi

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

<longdesc lang="en">
This Linux-specific resource agent acts as a dummy
resource agent for nfs-ganesha.
</longdesc>

<shortdesc lang="en">Manages the user-space nfs-ganesha NFS server</shortdesc>

<parameters>
<parameter name="ha_vol_name">
<longdesc lang="en">HA State Volume Name</longdesc>
<shortdesc lang="en">HA_State Volume Name</shortdesc>
<content type="string" default="" />
</parameter>

<parameter name="ha_vol_mnt">
<longdesc lang="en">HA State Volume Mount Point</longdesc>
<shortdesc lang="en">HA_State Volume Mount Point</shortdesc>
<content type="string" default="" />
</parameter>

<parameter name="ha_vol_server">
<longdesc lang="en">HA State Volume Server</longdesc>
<shortdesc lang="en">HA_State Volume Server</shortdesc>
<content type="string" default="" />
</parameter>
</parameters>

<actions>
<action name="start"   timeout="40s" />
<action name="stop"    timeout="40s" />
<action name="status" depth="0"  timeout="20s" interval="1m" />
<action name="monitor" depth="0"  timeout="10s" interval="1m" />
<action name="meta-data"  timeout="20s" />
</actions>
</resource-agent>
END

return $OCF_SUCCESS
}

ganesha_nfsd_usage() {
	echo "ganesha.nfsd USAGE"
}

# Make sure meta-data and usage always succeed
case $__OCF_ACTION in
	meta-data)	ganesha_meta_data
			exit $OCF_SUCCESS
			;;
	usage|help)	ganesha_usage
			exit $OCF_SUCCESS
			;;
	*)
			;;
esac

ganesha_nfsd_start()
{
	return $OCF_SUCCESS
}

ganesha_nfsd_stop()
{
	local mounted=""
	local mntptinuse=""
	local instance_host=""
	local short_host=""
	local resource_prefix=${OCF_RESOURCE_INSTANCE:0:9}

	if [ "X${resource_prefix}X" = "Xnfs_startX" ]; then

		mounted=$(mount | grep $OCF_RESKEY_ha_vol_name)
		mntptinuse=$(mount | grep -o $OCF_RESKEY_ha_vol_mnt)
		short_host=$(hostname -s)
		long_host=$(hostname)

		if [[ ! ${mounted} ]]; then

			if [ -d $OCF_RESKEY_ha_vol_mnt ]; then
				if [[ ${mntptinuse} ]]; then
					return $OCF_ERR_GENERIC
				fi
			else
				mkdir ${mntpt}
			fi

			mount -t glusterfs $OCF_RESKEY_ha_vol_server:$OCF_RESKEY_ha_vol_name $OCF_RESKEY_ha_vol_mnt
			if [ $? -ne 0 ]; then
				logger "warning: mount -t glusterfs $OCF_RESKEY_ha_vol_server:$OCF_RESKEY_ha_vol_name $OCF_RESKEY_ha_vol_mnt failed"
			fi

			mv /var/lib/nfs /var/lib/nfs.backup
			ln -s $OCF_RESKEY_ha_vol_mnt/${long_host}/nfs /var/lib/nfs
			if [ $? -ne 0 ]; then
				logger "warning: ln -s $OCF_RESKEY_ha_vol_mnt/${long_host}/nfs /var/lib/nfs failed"
			fi

		fi

		service nfs-ganesha start
		if [ $? -ne 0 ]; then
			logger "warning: service nfs-ganesha start failed"
		fi
	else
		umount $OCF_RESKEY_ha_vol_mnt
		if [ $? -ne 0 ]; then
			logger "warning: umount $OCF_RESKEY_ha_vol_mnt failed"
		fi

		service nfs-ganesha stop
		if [ $? -ne 0 ]; then
			logger "warning: service nfs-ganesha stop failed"
		fi
	fi

	return $OCF_SUCCESS
}

ganesha_nfsd_monitor()
{
	return $OCF_SUCCESS
}

ganesha_nfsd_validate()
{
	return $OCF_SUCCESS
}

ganesha_nfsd_validate

# logger "ganesha_nfsd ${OCF_RESOURCE_INSTANCE} $__OCF_ACTION"

# Translate each action into the appropriate function call
case $__OCF_ACTION in
start)          ganesha_nfsd_start
		;;
stop)           ganesha_nfsd_stop
		;;
status|monitor) ganesha_nfsd_monitor
		;;
*)              ganesha_nfsd_usage
                exit $OCF_ERR_UNIMPLEMENTED
                ;;
esac

rc=$?

# The resource agent may optionally log a debug message
ocf_log debug "${OCF_RESOURCE_INSTANCE} $__OCF_ACTION returned $rc"
exit $rc