4 # Test resizing a qcow2 image with a backing file
6 # Copyright (C) 2020 Igalia, S.L.
7 # Author: Alberto Garcia <berto@igalia.com>
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.
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.
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/>.
24 owner=berto@igalia.com
27 echo "QA output created by $seq"
29 status=1 # failure is the default!
35 trap "_cleanup; exit \$status" 0 1 2 3 15
37 # get standard environment, filters and checks
42 _supported_proto file fuse
44 # We need qemu-img map to show the file where the data is allocated,
45 # but with an external data file, it will show that instead of the
46 # file we want to check. So just skip this test for external data
48 _unsupported_imgopts data_file
50 echo '### Create the backing image'
51 BACKING_IMG="$TEST_IMG.base"
52 TEST_IMG="$BACKING_IMG" _make_test_img 1M
54 echo '### Fill the backing image with data (0x11)'
55 $QEMU_IO -c 'write -P 0x11 0 1M' "$BACKING_IMG" | _filter_qemu_io
57 echo '### Create the top image'
58 _make_test_img -F "$IMGFMT" -b "$BACKING_IMG"
60 echo '### Fill the top image with data (0x22)'
61 $QEMU_IO -c 'write -P 0x22 0 1M' "$TEST_IMG" | _filter_qemu_io
63 # Both offsets are part of the same cluster.
64 echo '### Shrink the image to 520k'
65 $QEMU_IMG resize --shrink "$TEST_IMG" 520k
66 echo '### Grow the image to 567k'
67 $QEMU_IMG resize "$TEST_IMG" 567k
69 echo '### 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
73 echo '### Show output of qemu-img map'
74 $QEMU_IMG map "$TEST_IMG" | _filter_testdir