qemu/tests/qemu-iotests/090

#!/usr/bin/env bash
# group: rw auto quick
#
# Test for discarding compressed clusters on qcow2 images
#
# Copyright (C) 2014 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=hreitz@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

_supported_fmt qcow2
_supported_proto file nfs fuse
# External data files do not support compressed clusters
_unsupported_imgopts data_file

IMG_SIZE=128K

_make_test_img $IMG_SIZE

$QEMU_IO -c 'write -c -P 42 0 64k' \
         -c 'write -c -P 23 64k 64k' \
         -c 'discard 64k 64k' \
         "$TEST_IMG" | _filter_qemu_io

$QEMU_IO -c 'read -P 0 64k 64k' "$TEST_IMG" | _filter_qemu_io

_check_test_img

# success, all done
echo "*** done"
rm -f $seq.full
status=0