#!/bin/bash

# -------------------------------------------------------------------------- #
# Copyright 2002-2015, OpenNebula Project (OpenNebula.org), C12G Labs        #
#                                                                            #
# 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.                                             #
#--------------------------------------------------------------------------- #

# MV <hostA:system_ds/disk.i|hostB:system_ds/disk.i> vmid dsid
#    <hostA:system_ds/|hostB:system_ds/>
#   - hostX is the target host to deploy the VM
#   - system_ds is the path for the system datastore in the host
#   - vmid is the id of the VM
#   - dsid is the target datastore (0 is the system datastore)

SRC=$1
DST=$2

VMID=$3
DSID=$4

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

. $TMCOMMON

#-------------------------------------------------------------------------------
# Return if moving a disk, we will move them when moving the whole system_ds
# directory for the VM
#-------------------------------------------------------------------------------
SRC=`fix_dir_slashes $SRC`
DST=`fix_dir_slashes $DST`

SRC_PATH=`arg_path $SRC`
DST_PATH=`arg_path $DST`

SRC_HOST=`arg_host $SRC`
DST_HOST=`arg_host $DST`

DST_DIR=`dirname $DST_PATH`

SRC_DS_DIR=`dirname  $SRC_PATH`
SRC_VM_DIR=`basename $SRC_PATH`

if [ `is_disk $DST_PATH` -eq 1 ]; then
	exit 0
fi

if [ "$SRC" == "$DST" ]; then
    log "Not moving $SRC to $DST, they are the same path"
	exit 0
fi

ssh_make_path "$DST_HOST" "$DST_DIR"

log "Moving $SRC to $DST"

ssh_exec_and_log "$DST_HOST" "rm -rf '$DST_PATH'" \
    "Error removing target path to prevent overwrite errors"

TAR_COPY="$SSH $SRC_HOST '$TAR -C $SRC_DS_DIR --sparse -cf - $SRC_VM_DIR'"
TAR_COPY="$TAR_COPY | $SSH $DST_HOST '$TAR -C $DST_DIR --sparse -xf -'"

exec_and_log "eval $TAR_COPY" "Error copying disk directory to target host"

exec_and_log "$SSH $SRC_HOST rm -rf $SRC_PATH"

exit 0
