#!/bin/bash

# -------------------------------------------------------------------------- #
# Copyright 2002-2025, 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.                                             #
#--------------------------------------------------------------------------- #

# resize image size vmid

SRC=$1
SIZE=$2
VMID=$3

if [ -z "${ONE_LOCATION}" ]; then
    TMCOMMON=/var/lib/one/remotes/tm/tm_common.sh
    DATASTORES=/var/lib/one/datastores
else
    TMCOMMON=$ONE_LOCATION/var/remotes/tm/tm_common.sh
    DATASTORES=$ONE_LOCATION/var/datastores
fi

. $TMCOMMON

DRIVER_PATH=$(dirname $0)

SRC_PATH=$(arg_path $SRC)
SRC_HOST=$(arg_host $SRC)

# for running VMs, leave disk resize on kvm/resize_disk
if [ `lcm_state $VMID` -eq 62 ]; then
    log "Not resizing disk ${SRC_PATH} for running virt. machine directly"
    exit 0
fi

#-------------------------------------------------------------------------------
# Get Image information
#-------------------------------------------------------------------------------

DISK_ID=$(basename ${SRC_PATH} | cut -d. -f2)

XPATH="${DRIVER_PATH}/../../datastore/xpath.rb --stdin"
unset i j XPATH_ELEMENTS
while IFS= read -r -d '' element; do
    XPATH_ELEMENTS[i++]="$element"
done < <(onevm show -x $VMID| $XPATH \
                    /VM/TEMPLATE/DISK\[DISK_ID=$DISK_ID\]/SPARSE)
SPARSE="${XPATH_ELEMENTS[j++]}"


if [[ "${SPARSE}" =~ ^(no|NO)$ ]]; then
    RESIZE_CMD="qemu-img resize --preallocation=falloc ${SRC_PATH} ${SIZE}M"
else
    RESIZE_CMD="qemu-img resize ${SRC_PATH} ${SIZE}M"
fi

ssh_exec_and_log "${SRC_HOST}" "$RESIZE_CMD" \
                 "Error resizing image ${SRC_PATH}"
