#!/bin/bash
# Copyright 2012 Citrix Systems, Inc. Licensed under the
# Apache License, Version 2.0 (the "License"); you may not use this
# file except in compliance with the License.  Citrix Systems, Inc.
# reserves all rights not expressly granted by the License.
# You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# 
# Automatically generated by addcopyright.py at 04/03/2012

#set -x

usage() {
  printf "Usage: %s [uuid of this host] [uuid of the sr to place the heartbeat] [ add , true/false]\n" $(basename $0)

}


if [ -z $1 ]; then
  usage
  echo "#1# no uuid of host"
  exit 0
fi

if [ -z $2 ]; then
  usage
  echo "#2# no uuid of sr"
  exit 0
fi

if [ -z $3 ]; then
  usage
  echo "#21# no add parameter"
  exit 0
fi


if [ `xe host-list | grep $1 | wc -l` -ne 1 ]; then
  echo  "#3# Unable to find the host uuid: $1"
  exit 0
fi

if [ `xe sr-list uuid=$2 | wc -l`  -eq 0 ]; then 
  echo "#4# Unable to find SR with uuid: $2"
  exit 0
fi

if [ `xe pbd-list sr-uuid=$2 | grep -B 1 $1 | wc -l` -eq 0 ]; then
  echo "#5# Unable to find a pbd for the SR: $2"
  exit 0
fi

hbfile=/opt/xensource/bin/heartbeat

if [ "$3" = "true" ]; then

  srtype=`xe sr-param-get param-name=type uuid=$2`

 
  if [ "$srtype" = "nfs" ];then
    dir=/var/run/sr-mount/$2
    filename=$dir/hb-$1
    if [ ! -f "$filename" ]; then
      echo "#6# heartbeat file $filename doesn't exist"
      exit 0
    fi
  else 
    dir=/dev/VG_XenStorage-$2
    link=$dir/hb-$1
    lvchange -ay $link
    if [ $? -ne 0 ]; then
       echo "#7# Unable to make the heartbeat $link active"
       exit 0
    fi
  fi


  if [ -f $hbfile ]; then
    grep $dir $hbfile >/dev/null
    if [ $? -gt 0 ]
    then
      echo $dir >> $hbfile
    fi
  else
    echo $dir >> $hbfile
  fi

else 
  if [ -f $hbfile ]; then
    sed -i /$2/d $hbfile 
  fi
fi

echo "#0#DONE"

exit 0