#!/bin/sh
#
#	Resource Agent for managing the DLM controld process.
#
# Copyright (c) 2009 Novell, 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:

: ${OCF_FUNCTIONS=${OCF_ROOT}/resource.d/heartbeat/.ocf-shellfuncs}
. ${OCF_FUNCTIONS}
: ${__OCF_ACTION=$1}

#######################################################################

meta_data() {
	cat <<END
<?xml version="1.0"?>
<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
<resource-agent name="controld" version="0.9">
<version>1.0</version>

<longdesc lang="en">
This Resource Agent can control the dlm_controld services needed by ocfs2.
It assumes that dlm_controld is in your default PATH.
In most cases, it should be run as an anonymous clone.
</longdesc>
<shortdesc lang="en">DLM Agent for OCFS2</shortdesc>

<parameters>

<parameter name="args" unique="1">
<longdesc lang="en">
Any additional options to start the dlm_controld service with
</longdesc>
<shortdesc lang="en">DLM Options</shortdesc>
<content type="string" default="-q 0" />
</parameter>

<parameter name="configdir" unique="1">
<longdesc lang="en">
The location where configfs is or should be mounted
</longdesc>
<shortdesc lang="en">Location of configfs</shortdesc>
<content type="string" default="/sys/kernel/config" />
</parameter>

<parameter name="daemon" unique="1">
<longdesc lang="en">
The daemon to start - supports gfs_controld(.pcmk) and dlm_controld(.pcmk)
</longdesc>
<shortdesc lang="en">The daemon to start</shortdesc>
<content type="string" default="dlm_controld.pcmk" />
</parameter>

</parameters>

<actions>
<action name="start"        timeout="90" />
<action name="stop"         timeout="100" />
<action name="monitor"      timeout="20" interval="10" depth="0" start-delay="0" />
<action name="meta-data"    timeout="5" />
<action name="validate-all"   timeout="30" />
</actions>
</resource-agent>
END
}

#######################################################################

controld_usage() {
	cat <<END
usage: $0 {start|stop|monitor|validate-all|meta-data}

Expects to have a fully populated OCF RA-compliant environment set.
END
}

controld_start() {
    controld_monitor; rc=$?

    case $rc in
      $OCF_SUCCESS)     return $OCF_SUCCESS;;
      $OCF_NOT_RUNNING) ;;
      *) return $OCF_ERR_GENERIC;;
    esac

        if [ ! -e $OCF_RESKEY_configdir ]; then
    	    modprobe configfs
    	    if [ ! -e $OCF_RESKEY_configdir ]; then
               ocf_log err "$OCF_RESKEY_configdir not available"
       	       return $OCF_NOT_INSTALLED
	    fi
	fi

    	mount | grep "type configfs" > /dev/null
    	if [ $? != 0 ]; then
	   mount -t configfs none $OCF_RESKEY_configdir    
    	fi

    	if [ ! -e $OCF_RESKEY_configdir/dlm ]; then
           modprobe dlm
    	   if [ ! -e $OCF_RESKEY_configdir/dlm ]; then
              ocf_log err "$OCF_RESKEY_configdir/dlm not available"
       	      return $OCF_NOT_INSTALLED
	   fi
    	fi

    ${OCF_RESKEY_daemon} $OCF_RESKEY_args

    sleep 1
    controld_monitor
}

controld_stop() {
    controld_monitor; rc=$?

    if [ $rc = $OCF_NOT_RUNNING ]; then
	return $OCF_SUCCESS
    fi

    killall -TERM ${OCF_RESKEY_daemon}; rc=$?

    if [ $rc != 0 ]; then
	return $OCF_ERR_GENERIC
    fi

    rc=$OCF_SUCCESS
    while [ $rc = $OCF_SUCCESS ]; do
	controld_monitor; rc=$?
	sleep 1
    done

    if [ $rc = $OCF_NOT_RUNNING ]; then
    	rc=$OCF_SUCCESS
    fi

    return $rc
}

controld_monitor() {
    killall -0 ${OCF_RESKEY_daemon}; rc=$?

    case $rc in
      0) return $OCF_SUCCESS;;
      1) return $OCF_NOT_RUNNING;;
      *) return $OCF_ERR_GENERIC;;
    esac
}

controld_validate() {
    check_binary ${OCF_RESKEY_daemon}

    case ${OCF_RESKEY_CRM_meta_gloablly_unique} in
	yes|Yes|true|True|1) 
	    ocf_log err "$OCF_RESOURCE_INSTANCE must be configured with the gloablly_unique=false meta attribute"
	    exit $OCF_ERR_CONFIGURED
	    ;;
    esac

    [ -d /var/run/cluster ] || mkdir /var/run/cluster

    return $OCF_SUCCESS
}

: ${OCF_RESKEY_sctp=false}
: ${OCF_RESKEY_configdir=/sys/kernel/config}
: ${OCF_RESKEY_CRM_meta_gloablly_unique:="false"}

case "$HA_quorum_type" in
    cman) daemon_ext="";;
    *) daemon_ext=".pcmk";;
esac

case "$OCF_RESOURCE_INSTANCE" in
    *[gG][fF][sS]*) 
	: ${OCF_RESKEY_args=-g 0}
	: ${OCF_RESKEY_daemon=gfs_controld${daemon_ext}}
	;;
    *[dD][lL][mM]*)
	: ${OCF_RESKEY_args=-q 0}
	: ${OCF_RESKEY_daemon=dlm_controld${daemon_ext}}
	;;
    *)
	: ${OCF_RESKEY_args=-q 0}
	: ${OCF_RESKEY_daemon=dlm_controld${daemon_ext}}
esac

case $__OCF_ACTION in
meta-data)	meta_data
		exit $OCF_SUCCESS
		;;
start)		controld_validate; controld_start;;
stop)		controld_stop;;
monitor)	controld_validate; controld_monitor;;
validate-all)	controld_validate;;
usage|help)	controld_usage
		exit $OCF_SUCCESS
		;;
*)		controld_usage
		exit $OCF_ERR_UNIMPLEMENTED
		;;
esac
rc=$?

exit $rc