qemu/tests/qemu-iotests/062

#!/usr/bin/env bash
# group: rw auto quick
#
# 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"

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 qcow2-specific low-level functionality
_supported_fmt qcow2
_supported_proto generic
# We need zero clusters and snapshots
_unsupported_imgopts 'compat=0.10' 'refcount_bits=1[^0-9]' data_file

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