#!/bin/bash

# -------------------------------------------------------------------------- #
# Copyright 2002-2017, OpenNebula Project, OpenNebula Systems                #
#                                                                            #
# Licensed under the Apache License, Version 2.0 (the "License"); you may    #
# not use this file except in compliance with 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.                                             #
#--------------------------------------------------------------------------- #

DOMAIN=$1
DISK_ID=$2
DISK_SIZE=$3
DRV_ACTION=$4

source $(dirname $0)/kvmrc
source $(dirname $0)/../../scripts_common.sh

(
set -e

get_disk_information "DISK_ID=$DISK_ID"

regexp="/domain/devices/disk[target/@dev='${DISK_TARGET}']/alias/@name"

drives="virsh --connect $LIBVIRT_URI dumpxml $DOMAIN"
alias=$($drives | $XPATH --stdin "$regexp")

if [ -n "$alias" ]; then
    drive="drive-$alias"
else
    error_message "Drive $DISK_TARGET not found"
    exit -1
fi

log_info "Resizing $DISK_TARGET to $DISK_SIZE"

virsh --connect $LIBVIRT_URI qemu-monitor-command $DOMAIN --hmp "block_resize $drive ${DISK_SIZE}M"

) > /dev/null

if [ $? -ne 0 ]; then
    echo "Could not notify the VM about the disk resize. Poweroff cycle needed."
fi


