#!/bin/bash

# -------------------------------------------------------------------------- #
# Copyright 2002-2013, OpenNebula Project Leads (OpenNebula.org)             #
#                                                                            #
# 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.                                             #
#--------------------------------------------------------------------------- #

###############################################################################
# This script is used to create a VM image (SRC) of size (SIZE) and formatted
# as (FS)
###############################################################################

# -------- Set up the environment to source common tools & conf ------------

if [ -z "${ONE_LOCATION}" ]; then
    LIB_LOCATION=/usr/lib/one
    VMWARERC=/etc/one/vmwarerc
else
    LIB_LOCATION=$ONE_LOCATION/lib
    VMWARERC=$ONE_LOCATION/etc/vmwarerc
fi

. $LIB_LOCATION/sh/scripts_common.sh

DRIVER_PATH=$(dirname $0)
source ${DRIVER_PATH}/../libfs.sh
source ${DRIVER_PATH}/vmfs.conf

# -------- Get mkfs and datastore arguments from OpenNebula core ------------

DRV_ACTION=$1
ID=$2

XPATH="${DRIVER_PATH}/../xpath.rb -b $DRV_ACTION"

unset i XPATH_ELEMENTS

while IFS= read -r -d '' element; do
    XPATH_ELEMENTS[i++]="$element"
done < <($XPATH     /DS_DRIVER_ACTION_DATA/DATASTORE/BASE_PATH \
                    /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/RESTRICTED_DIRS \
                    /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/SAFE_DIRS \
                    /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/UMASK \
                    /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/BRIDGE_LIST \
                    /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/DS_USE_SSH \
                    /DS_DRIVER_ACTION_DATA/DATASTORE/ID \
                    /DS_DRIVER_ACTION_DATA/IMAGE/FSTYPE \
                    /DS_DRIVER_ACTION_DATA/IMAGE/SIZE \
                    /DS_DRIVER_ACTION_DATA/IMAGE/ID)

BASE_PATH="${XPATH_ELEMENTS[0]}"
RESTRICTED_DIRS="${XPATH_ELEMENTS[1]}"
SAFE_DIRS="${XPATH_ELEMENTS[2]}"
UMASK="${XPATH_ELEMENTS[3]}"
BRIDGE_LIST="${XPATH_ELEMENTS[4]}"
USE_SSH="${XPATH_ELEMENTS[5]:-$DS_USE_SSH}"
DS_ID="${XPATH_ELEMENTS[6]}"
FSTYPE="${XPATH_ELEMENTS[7]}"
SIZE="${XPATH_ELEMENTS[8]}"
IMAGE_ID="${XPATH_ELEMENTS[9]}"
DST=`generate_image_path`
DST_DIR=`dirname $DST`
DST_FOLDER=`basename $DST`
DST_HOST=`get_destination_host $IMAGE_ID`

# ------------ Set up datastore  -------------

set_up_datastore "$BASE_PATH" "$RESTRICTED_DIRS" "$SAFE_DIRS" "$UMASK"

vmfs_set_up

vmfs_create_remote_path $DS_ID

# ------------ Image to save_as disk, no need to create a FS ------------

if [ "$FSTYPE" = "save_as" ]; then
    echo "$DST"
    exit 0
fi

# ------------ Create the image within the image datastore ------------

log "Making filesystem of ${SIZE}M (with no format) at [$DS_ID]$DST_FOLDER on $DST_HOST"

IMAGE_FORMAT=vmdk
VMWARE_DISK_TYPE=`echo $FSTYPE|cut -d'_' -f 2`

if [ "$USE_SSH" == "yes" ]; then
    $SSH $DST_HOST $VMKFSTOOLS -U [$DS_ID]$DST_FOLDER/disk.vmdk &> /dev/null
    ssh_exec_and_log $DST_HOST "$VMKFSTOOLS -c ${SIZE}M -d ${VMWARE_DISK_TYPE} /vmfs/volumes/$DS_ID/$DST_FOLDER/disk.vmdk" \
                               "Cannot create [$DS_ID] $DST_FOLDER/disk.vmdk on $DST_HOST"
else
    $VMKFSTOOLS $VI_PARAMS -U [$DS_ID]$DST_FOLDER/disk.vmdk &> /dev/null
    exec_and_log "$VMKFSTOOLS $VI_PARAMS -c ${SIZE}M -d ${VMWARE_DISK_TYPE} [$DS_ID]$DST_FOLDER/disk.vmdk" \
                 "Cannot create $DS_ID]$DST_FOLDER/disk.vmdk on $DST_HOST"
fi

echo "/vmfs/volumes/$DS_ID/$DST_FOLDER"
