qemu-iotests: Discard preallocated zero clusters

Add a new test case for discarding preallocated zero clusters; doing
this should not result in any leaks.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Max Reitz 2013-10-09 12:07:33 +02:00 committed by Kevin Wolf
parent f6186f49e2
commit 975a93c082
3 changed files with 77 additions and 0 deletions

63
tests/qemu-iotests/066 Executable file
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@ -0,0 +1,63 @@
#!/bin/bash
#
# Test case for discarding preallocated 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 normal clusters, zero them (creating preallocated zero clusters)
# and discard those
$QEMU_IO -c "write 0 256k" -c "write -z 0 256k" -c "discard 0 256k" "$TEST_IMG" \
| _filter_qemu_io
# Check the image (there shouldn't be any leaks)
_check_test_img
# success, all done
echo "*** done"
rm -f $seq.full
status=0

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QA output created by 066
=== 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)
wrote 262144/262144 bytes at offset 0
256 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
discard 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

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062 rw auto
063 rw auto
065 rw auto
066 rw auto