| 1 | #!/usr/bin/env bash |
| 2 | # group: rw quick |
| 3 | # |
| 4 | # Test the handling of errors in write requests with multiple allocations |
| 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 |
| 24 | owner=berto@igalia.com |
| 25 | |
| 26 | seq=`basename $0` |
| 27 | echo "QA output created by $seq" |
| 28 | |
| 29 | status=1 # failure is the default! |
| 30 | |
| 31 | _cleanup() |
| 32 | { |
| 33 | _cleanup_test_img |
| 34 | } |
| 35 | trap "_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 | _unsupported_imgopts cluster_size refcount_bits extended_l2 compat=0.10 data_file |
| 45 | |
| 46 | echo '### Create the image' |
| 47 | _make_test_img -o refcount_bits=64,cluster_size=1k 1M |
| 48 | |
| 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 |
| 52 | # block. |
| 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 |
| 55 | |
| 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 |
| 59 | |
| 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" |
| 63 | |
| 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 |
| 68 | # is corrupted. |
| 69 | echo '### Try to allocate the discarded clusters again' |
| 70 | $QEMU_IO -c 'write 121k 3k' "$TEST_IMG" | _filter_qemu_io |
| 71 | |
| 72 | # success, all done |
| 73 | echo "*** done" |
| 74 | rm -f $seq.full |
| 75 | status=0 |