#!/bin/bash

#rbt
# Description in BREST-2936

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

. $LIB_LOCATION/sh/scripts_common.sh

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

# -------- 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/IMAGE/FSTYPE \
                    /DS_DRIVER_ACTION_DATA/IMAGE/DATASTORE_ID \
                    /DS_DRIVER_ACTION_DATA/IMAGE/SIZE \
                    /DS_DRIVER_ACTION_DATA/IMAGE/FORMAT \
                    /DS_DRIVER_ACTION_DATA/IMAGE/FS )

unset i

BASE_PATH="${XPATH_ELEMENTS[i++]}"
RESTRICTED_DIRS="${XPATH_ELEMENTS[i++]}"
SAFE_DIRS="${XPATH_ELEMENTS[i++]}"
FSTYPE="${XPATH_ELEMENTS[i++]}"
DS_ID="${XPATH_ELEMENTS[i++]}"
SIZE="${XPATH_ELEMENTS[i++]}"
FORMAT="${XPATH_ELEMENTS[i++]}"
FS="${XPATH_ELEMENTS[i++]}"

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

DST=`generate_image_path`

# ------------ Create the image to the repository ------------

LV_NAME="lv-one-image-${ID}"
VG_NAME="vg-one-${DS_ID}"
DEV="/dev/${VG_NAME}/${LV_NAME}"

REAL_SIZE=1024

# will be extended if needed in tm_mad/cpds
SAVE_AS_SIZE=1024
if [ "$FORMAT" = "save_as" ]; then
    $SUDO $LVCREATE -L${SAVE_AS_SIZE}M -n $LV_NAME $VG_NAME -y >/dev/null 2>&1
    $SUDO $LVCHANGE -an "${VG_NAME}/${LV_NAME}" >/dev/null 2>&1
    echo $DEV
    exit 0
fi

# create LVM volume - initial size is 1024 Mb
$SUDO $LVCREATE -L${REAL_SIZE}M -n $LV_NAME $VG_NAME -y >/dev/null 2>&1

# QEMU format
if [ "$FORMAT" = "qcow2" ]; then
    # qemu image - user provided size
    $QEMU_IMG create -o cluster_size=2048K -f ${FORMAT} ${DEV} ${SIZE}M >/dev/null 2>&1
    $SUDO $LVCHANGE -an "${VG_NAME}/${LV_NAME}" >/dev/null 2>&1
else
    log_error "QCOW2 format only"
    error_message "QCOW2 format only"
    exit -1
fi


#FS_OPTS=$(eval $(echo "echo \$FS_OPTS_$FS"))
# TODO - mkfs makes raw
#$MKFS -F -t ${FS} ${FS_OPTS} ${DEV}

echo "$DEV"
