3 # General test case for qcow2's image check
5 # Copyright (C) 2015 Red Hat, Inc.
7 # This program is free software; you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation; either version 2 of the License, or
10 # (at your option) any later version.
12 # This program is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
25 echo "QA output created by $seq"
27 status=1 # failure is the default!
33 trap "_cleanup; exit \$status" 0 1 2 3 15
35 # get standard environment, filters and checks
39 # This tests qcow2-specific low-level functionality
43 # With an external data file, data clusters are not refcounted
44 # (and so qemu-img check does not check their refcount)
45 _unsupported_imgopts data_file
48 echo '=== Check on an image with a multiple of 2^32 clusters ==='
51 _make_test_img -o "cluster_size=512" 512
54 $QEMU_IO -c 'write 0 512' "$TEST_IMG" | _filter_qemu_io
56 # Put the data cluster at a multiple of 2 TB, resulting in the image apparently
57 # having a multiple of 2^32 clusters
58 # (To be more specific: It is at 32 PB)
59 poke_file "$TEST_IMG" $((2048 + 8)) "\x00\x80\x00\x00\x00\x00\x00\x00"
61 # An offset of 32 PB results in qemu-img check having to allocate an in-memory
62 # refcount table of 128 TB (16 bit refcounts, 512 byte clusters), if qemu-img
63 # don't check that referenced data cluster is far beyond the end of file.
64 # But starting from 4.0, qemu-img does this check, and instead of "Cannot
65 # allocate memory", we have an error showing that l2 entry is invalid.