4 # Test the handling of errors in write requests with multiple allocations
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 _unsupported_imgopts cluster_size refcount_bits extended_l2 compat=0.10 data_file
46 echo '### Create the image'
47 _make_test_img -o refcount_bits=64,cluster_size=1k 1M
49 # The reference counts of the clusters for the first 123k of this
50 # write request are stored in the first refcount block. The last
51 # cluster (guest offset 123k) is referenced in the second refcount
53 echo '### Fill the first refcount block and one data cluster from the second'
54 $QEMU_IO -c 'write 0 124k' "$TEST_IMG" | _filter_qemu_io
56 echo '### Discard two of the last data clusters, leave one in the middle'
57 $QEMU_IO -c 'discard 121k 1k' "$TEST_IMG" | _filter_qemu_io
58 $QEMU_IO -c 'discard 123k 1k' "$TEST_IMG" | _filter_qemu_io
60 echo '### Corrupt the offset of the second refcount block'
61 refcount_table_offset=$(peek_file_be "$TEST_IMG" 48 8)
62 poke_file "$TEST_IMG" $(($refcount_table_offset+14)) "\x06"
64 # This tries to allocate the two clusters discarded earlier (guest
65 # offsets 121k and 123k). Their reference counts are in the first and
66 # second refcount blocks respectively, but only the first one can be
67 # allocated correctly because the second entry of the refcount table
69 echo '### Try to allocate the discarded clusters again'
70 $QEMU_IO -c 'write 121k 3k' "$TEST_IMG" | _filter_qemu_io