qemu-iotests: Snapshotting zero clusters

#!/bin/bash

#

# Test case for snapshotting images with unallocated zero clusters in

# qcow2

#

# Copyright (C) 2013 Red Hat, Inc.

#

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 2 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program.  If not, see <http://www.gnu.org/licenses/>.

#

# creator

owner=mreitz@redhat.com

seq=`basename $0`

echo "QA output created by $seq"

here=`pwd`

tmp=/tmp/$$

status=1	# failure is the default!

_cleanup()

{

	_cleanup_test_img

}

trap "_cleanup; exit \$status" 0 1 2 3 15

# get standard environment, filters and checks

. ./common.rc

. ./common.filter

# This tests qocw2-specific low-level functionality

_supported_fmt qcow2

_supported_proto generic

_supported_os Linux

IMGOPTS="compat=1.1"

IMG_SIZE=64M

echo

echo "=== Testing snapshotting an image with zero clusters ==="

echo

_make_test_img $IMG_SIZE

# Write some zero clusters

$QEMU_IO -c "write -z 0 256k" "$TEST_IMG" | _filter_qemu_io

# Create a snapshot

$QEMU_IMG snapshot -c foo "$TEST_IMG"

# Check the image (there shouldn't be any errors or leaks)

_check_test_img

# success, all done

echo "*** done"

rm -f $seq.full

status=0

QA output created by 062

=== Testing snapshotting an image with zero clusters ===

Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 

wrote 262144/262144 bytes at offset 0

256 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)

No errors were found on the image.

*** done

055 rw auto

056 rw auto backing

059 rw auto

062 rw auto