3dd3e248eb
This test checks bug in qcow2_process_discards, fixed by previous commit. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
79 lines
2.2 KiB
Bash
Executable File
79 lines
2.2 KiB
Bash
Executable File
#!/usr/bin/env bash
|
|
#
|
|
# Test big discard in qcow2 shrink
|
|
#
|
|
# Copyright (c) 2019 Virtuozzo International GmbH. All rights reserved.
|
|
#
|
|
# 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=vsementsov@virtuozzo.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
|
|
_supported_os Linux
|
|
|
|
# This test checks that qcow2_process_discards does not truncate a discard
|
|
# request > 2G.
|
|
# To reproduce bug we need to overflow int by one sequential discard, so we
|
|
# need size > 2G, bigger cluster size (as with default 64k we may have maximum
|
|
# of 512M sequential data, corresponding to one L1 entry), and we need some
|
|
# data of the beginning of the disk mapped to the end of file to prevent
|
|
# bdrv_co_truncate(bs->file) call in qcow2_co_truncate(), which might succeed
|
|
# anyway.
|
|
|
|
disk_usage()
|
|
{
|
|
du --block-size=1 $1 | awk '{print $1}'
|
|
}
|
|
|
|
size=2100M
|
|
IMGOPTS="cluster_size=1M,preallocation=metadata"
|
|
|
|
_make_test_img $size
|
|
$QEMU_IO -c 'discard 0 10M' -c 'discard 2090M 10M' \
|
|
-c 'write 2090M 10M' -c 'write 0 10M' "$TEST_IMG" | _filter_qemu_io
|
|
|
|
# Check that our trick with swapping first and last 10M chunks succeeded.
|
|
# Otherwise test may pass even if bdrv_pdiscard() fails in
|
|
# qcow2_process_discards()
|
|
$QEMU_IMG map "$TEST_IMG" | _filter_testdir
|
|
|
|
before=$(disk_usage "$TEST_IMG")
|
|
$QEMU_IMG resize --shrink "$TEST_IMG" 5M
|
|
after=$(disk_usage "$TEST_IMG")
|
|
|
|
echo "Disk usage delta: $((before - after))"
|
|
|
|
# success, all done
|
|
echo "*** done"
|
|
rm -f $seq.full
|
|
status=0
|