#!/bin/bash

# -------------------------------------------------------------------------- #
# Copyright 2002-2011, 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.                                             #
#--------------------------------------------------------------------------- #

SRC=$1
DST=$2
SIZE=$3

if [ -z "${ONE_LOCATION}" ]; then
    TMCOMMON=/usr/lib/one/mads/tm_common.sh
    ISCSIRC=/etc/one/tm_iscsi/tm_iscsirc
else
    TMCOMMON=$ONE_LOCATION/lib/mads/tm_common.sh
    ISCSIRC=$ONE_LOCATION/etc/tm_iscsi/tm_iscsirc
fi

. $TMCOMMON
. $ISCSIRC

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

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

if [ -z $SIZE ] ; then
    SIZE=$DEFAULT_LV_SIZE
fi

LV_NAME=`get_lv_name $DST_PATH`

log "$1 $2"
log "DST: $DST_PATH"

DST_DIR=$(dirname $DST_PATH)

log "Creating directory $DST_DIR"
    exec_and_log "$SSH $DST_HOST mkdir -p $DST_DIR"

    log "Cloning LV $LV_NAME"
    exec_and_log "$SSH $STORAGE_HOST $SUDO $LVCREATE -s -L$SIZE -n $LV_NAME $SRC_PATH"

    log "Creating and exporting iscsi target"
    exec_and_log "$SSH $STORAGE_HOST $SUDO $ISCSIADD $LV_NAME $VG_NAME"

    log "Initiating iscsi target"
    exec_and_log "$SSH $DST_HOST $SUDO $ISCSIADM -m discovery -t st -p $STORAGE_HOST"
    exec_and_log "$SSH $DST_HOST $SUDO $ISCSIADM -m node | tee /tmp/$LV_NAME"

    ISCSI_TARGET=$($SSH $DST_HOST $CAT /tmp/$LV_NAME | $GREP $LV_NAME | $CUT -d " " -f2)
    ISCSI_HOST=$($SSH $DST_HOST $CAT /tmp/$LV_NAME | $GREP $LV_NAME | $CUT -d " " -f1 | $CUT -d "," -f1)

    exec_and_log "$SSH $DST_HOST $SUDO $ISCSIADM -m node --targetname \"$ISCSI_TARGET\" --portal \"$ISCSI_HOST\" --login"
   
    exec_and_log "$SSH $DST_HOST rm /tmp/$LV_NAME"

    log "Linking $DST_PATH to the iscsi device $DEVICE"
    exec_and_log "$SSH $DST_HOST $LN -s /dev/disk/by-path/ip-$(echo $ISCSI_HOST | $CUT -d ":" -f1)\:$(echo $ISCSI_HOST | $CUT -d ":" -f2)-iscsi-$(echo $ISCSI_TARGET | $CUT -d ":" -f1)\:$(echo $ISCSI_TARGET | $CUT -d ":" -f2)-lun-0 $DST_PATH"