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133 lines
2.9 KiB
Bash
Executable File
133 lines
2.9 KiB
Bash
Executable File
#!/bin/bash
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# Copyright (C) 2011 Citrix Systems, Inc. All rights reserved
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#
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# This software is licensed under the GNU General Public License v3 or later.
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#
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# It is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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#set -x
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usage() {
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printf "Usage: %s [vhd file in secondary storage] [template directory in secondary storage] \n" $(basename $0)
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}
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cleanup()
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{
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if [ ! -z $snapshotdir ]; then
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umount $snapshotdir
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if [ $? -eq 0 ]; then
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rmdir $snapshotdir
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fi
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fi
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if [ ! -z $templatedir ]; then
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umount $templatedir
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if [ $? -eq 0 ]; then
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rmdir $templatedir
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fi
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fi
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}
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if [ -z $1 ]; then
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usage
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echo "2#no vhd file path"
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exit 0
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else
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snapshoturl=${1%/*}
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vhdfilename=${1##*/}
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fi
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if [ -z $2 ]; then
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usage
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echo "3#no template path"
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exit 0
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else
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templateurl=$2
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fi
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snapshotdir=/var/run/cloud_mount/$(uuidgen -r)
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mkdir -p $snapshotdir
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if [ $? -ne 0 ]; then
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echo "4#cann't make dir $snapshotdir"
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exit 0
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fi
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mount -o tcp $snapshoturl $snapshotdir
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if [ $? -ne 0 ]; then
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rmdir $snapshotdir
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echo "5#can not mount $snapshoturl to $snapshotdir"
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exit 0
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fi
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templatedir=/var/run/cloud_mount/$(uuidgen -r)
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mkdir -p $templatedir
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if [ $? -ne 0 ]; then
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templatedir=""
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cleanup
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echo "6#cann't make dir $templatedir"
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exit 0
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fi
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mount -o tcp $templateurl $templatedir
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if [ $? -ne 0 ]; then
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rmdir $templatedir
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templatedir=""
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cleanup
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echo "7#can not mount $templateurl to $templatedir"
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exit 0
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fi
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VHDUTIL="/opt/xensource/bin/vhd-util"
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upgradeSnapshot()
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{
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local ssvhd=$1
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local parent=`$VHDUTIL query -p -n $ssvhd`
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if [ $? -ne 0 ]; then
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echo "30#failed to query $ssvhd"
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cleanup
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exit 0
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fi
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if [ "${parent##*vhd has}" = " no parent" ]; then
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dd if=$templatevhd of=$snapshotdir/$templatefilename bs=2M
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if [ $? -ne 0 ]; then
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echo "31#failed to dd $templatevhd to $snapshotdir/$templatefilenamed"
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cleanup
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exit 0
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fi
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$VHDUTIL modify -p $snapshotdir/$templatefilename -n $ssvhd
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if [ $? -ne 0 ]; then
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echo "32#failed to set parent of $ssvhd to $snapshotdir/$templatefilenamed"
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cleanup
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exit 0
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fi
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rm -f $parent
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else
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upgradeSnapshot $parent
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fi
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}
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templatevhd=$(ls $templatedir/*.vhd)
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if [ $? -ne 0 ]; then
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echo "8#template vhd doesn't exist for $templateurl"
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cleanup
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exit 0
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fi
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templatefilename=${templatevhd##*/}
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snapshotvhd=$snapshotdir/$vhdfilename
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upgradeSnapshot $snapshotvhd
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cleanup
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echo "0#success"
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exit 0
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