xref: /openbmc/qemu/tests/qemu-iotests/292 (revision 05a24871)
1#!/usr/bin/env bash
2# group: rw auto quick
3#
4# Test resizing a qcow2 image with a backing file
5#
6# Copyright (C) 2020 Igalia, S.L.
7# Author: Alberto Garcia <berto@igalia.com>
8#
9# This program is free software; you can redistribute it and/or modify
10# it under the terms of the GNU General Public License as published by
11# the Free Software Foundation; either version 2 of the License, or
12# (at your option) any later version.
13#
14# This program is distributed in the hope that it will be useful,
15# but WITHOUT ANY WARRANTY; without even the implied warranty of
16# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17# GNU General Public License for more details.
18#
19# You should have received a copy of the GNU General Public License
20# along with this program.  If not, see <http://www.gnu.org/licenses/>.
21#
22
23# creator
24owner=berto@igalia.com
25
26seq=`basename $0`
27echo "QA output created by $seq"
28
29status=1    # failure is the default!
30
31_cleanup()
32{
33    _cleanup_test_img
34}
35trap "_cleanup; exit \$status" 0 1 2 3 15
36
37# get standard environment, filters and checks
38. ./common.rc
39. ./common.filter
40
41_supported_fmt qcow2
42_supported_proto file fuse
43_supported_os Linux
44# We need qemu-img map to show the file where the data is allocated,
45# but with an external data file, it will show that instead of the
46# file we want to check.  So just skip this test for external data
47# files.
48_unsupported_imgopts data_file
49
50echo '### Create the backing image'
51BACKING_IMG="$TEST_IMG.base"
52TEST_IMG="$BACKING_IMG" _make_test_img 1M
53
54echo '### Fill the backing image with data (0x11)'
55$QEMU_IO -c 'write -P 0x11 0 1M' "$BACKING_IMG" | _filter_qemu_io
56
57echo '### Create the top image'
58_make_test_img -F "$IMGFMT" -b "$BACKING_IMG"
59
60echo '### Fill the top image with data (0x22)'
61$QEMU_IO -c 'write -P 0x22 0 1M' "$TEST_IMG" | _filter_qemu_io
62
63# Both offsets are part of the same cluster.
64echo '### Shrink the image to 520k'
65$QEMU_IMG resize --shrink "$TEST_IMG" 520k
66echo '### Grow the image to 567k'
67$QEMU_IMG resize "$TEST_IMG" 567k
68
69echo '### Check that the tail of the image reads as zeroes'
70$QEMU_IO -c 'read -P 0x22    0 520k' "$TEST_IMG" | _filter_qemu_io
71$QEMU_IO -c 'read -P 0x00 520k  47k' "$TEST_IMG" | _filter_qemu_io
72
73echo '### Show output of qemu-img map'
74$QEMU_IMG map "$TEST_IMG" | _filter_testdir
75
76# success, all done
77echo "*** done"
78rm -f $seq.full
79status=0
80