#!/bin/bash

# -------------------------------------------------------------------------- #
# Copyright 2002-2014, 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.                                             #
#--------------------------------------------------------------------------- #

# clone fe:SOURCE host:remote_system_ds/disk.i vmid dsid
#   - fe is the front-end hostname
#   - SOURCE is the path of the disk image in the form DS_BASE_PATH/disk
#   - host is the target host to deploy the VM
#   - remote_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

DRIVER_PATH=$(dirname $0)

. $DRIVER_PATH/shared_netapp.sh

#-------------------------------------------------------------------------------
# Set dst path and dir
#-------------------------------------------------------------------------------
DST_PATH=`arg_path $DST`
DST_HOST=`arg_host $DST`
DST_DIR=`dirname $DST_PATH`

SRC_ARG_PATH=`arg_path $SRC`

DST_DS_PATH="$(dirname $(dirname $(dirname $DST_PATH)))"
SRC_DS_PATH="$(dirname $(dirname $SRC_ARG_PATH))"

SRC_PATH="${DST_DS_PATH}${SRC_ARG_PATH##$SRC_DS_PATH}"

#-------------------------------------------------------------------------------
# Create DST path
#-------------------------------------------------------------------------------

ssh_make_path $DST_HOST $DST_DIR

#-------------------------------------------------------------------------------
# NetApp paths
#-------------------------------------------------------------------------------

DISK=$(basename $DST_PATH)

REAL_SRC_PATH=$(readlink -f $SRC_PATH)
FILER_SRC_PATH=${REAL_SRC_PATH/datastores/vol}

DST_DS=$(dirname $(dirname $DST_PATH))
REAL_DST_DS=$(readlink -f $DST_DS)
FILER_DST_DS=${REAL_DST_DS/datastores/vol}

FILER_DST_PATH="${FILER_DST_DS}/${VMID}/${DISK}"

#-------------------------------------------------------------------------------
# NetApp clone
#-------------------------------------------------------------------------------

NETAPP_CLONE_CMD="volume file clone create \
                    -source-path $FILER_SRC_PATH \
                    -destination-path $FILER_DST_PATH"

#-------------------------------------------------------------------------------
# Clone (cp) SRC into DST
#-------------------------------------------------------------------------------

case $SRC in
http://*)
    log "Downloading $SRC into $DST_PATH"
    ssh_exec_and_log $DST_HOST \
                     "$WGET -O $DST_PATH $SRC" \
                     "Error downloading $SRC"
    ;;

*)
    log "Cloning $SRC_PATH in $DST"

    SSH_EXEC_ERR=$($SSH $NETAPP_HOST "$NETAPP_CLONE_CMD" 2>&1 1>/dev/null)
    SSH_EXEC_RC=$?

    if [ $SSH_EXEC_RC -ne 0 ]; then
        log_error "Command \"$NETAPP_CLONE_CMD\" failed: $SSH_EXEC_ERR"
        error_message "Error copying $SRC to $DST"
        exit $SSH_EXEC_RC
    fi

    ;;
esac

exit 0