| 1 | #!/usr/bin/env bash |
| 2 | # group: rw |
| 3 | # |
| 4 | # Test compressed write to a qcow2 image at an offset above 4 GB |
| 5 | # |
| 6 | # Copyright (C) 2019 Red Hat, Inc. |
| 7 | # |
| 8 | # This program is free software; you can redistribute it and/or modify |
| 9 | # it under the terms of the GNU General Public License as published by |
| 10 | # the Free Software Foundation; either version 2 of the License, or |
| 11 | # (at your option) any later version. |
| 12 | # |
| 13 | # This program is distributed in the hope that it will be useful, |
| 14 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | # GNU General Public License for more details. |
| 17 | # |
| 18 | # You should have received a copy of the GNU General Public License |
| 19 | # along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 20 | # |
| 21 | |
| 22 | seq=$(basename "$0") |
| 23 | echo "QA output created by $seq" |
| 24 | |
| 25 | status=1 # failure is the default! |
| 26 | |
| 27 | _cleanup() |
| 28 | { |
| 29 | _cleanup_test_img |
| 30 | } |
| 31 | trap "_cleanup; exit \$status" 0 1 2 3 15 |
| 32 | |
| 33 | # get standard environment, filters and checks |
| 34 | . ./common.rc |
| 35 | . ./common.filter |
| 36 | |
| 37 | # This is a qcow2 regression test |
| 38 | _supported_fmt qcow2 |
| 39 | _supported_proto file fuse |
| 40 | |
| 41 | # External data files do not support compression; |
| 42 | # We need an exact cluster size (2M) and refcount width (2) so we can |
| 43 | # get this test quickly over with; and this in turn require |
| 44 | # compat=1.1 |
| 45 | _unsupported_imgopts data_file cluster_size refcount_bits 'compat=0.10' |
| 46 | |
| 47 | # The idea is: Create an empty file, mark the first 4 GB as used, then |
| 48 | # do a compressed write that thus must be put beyond 4 GB. |
| 49 | # (This used to fail because the compressed sector mask was just a |
| 50 | # 32 bit mask, so qemu-img check will count a cluster before 4 GB as |
| 51 | # referenced twice.) |
| 52 | |
| 53 | # We would like to use refcount_bits=1 here, but then qemu-img check |
| 54 | # will throw an error when trying to count a cluster as referenced |
| 55 | # twice. |
| 56 | _make_test_img -o cluster_size=2M,refcount_bits=2 64M |
| 57 | |
| 58 | reft_offs=$(peek_file_be "$TEST_IMG" 48 8) |
| 59 | refb_offs=$(peek_file_be "$TEST_IMG" $reft_offs 8) |
| 60 | |
| 61 | # We want to cover 4 GB, those are 2048 clusters, equivalent to |
| 62 | # 4096 bit = 512 B. |
| 63 | truncate -s 4G "$TEST_IMG" |
| 64 | for ((in_refb_offs = 0; in_refb_offs < 512; in_refb_offs += 8)); do |
| 65 | poke_file "$TEST_IMG" $((refb_offs + in_refb_offs)) \ |
| 66 | '\x55\x55\x55\x55\x55\x55\x55\x55' |
| 67 | done |
| 68 | |
| 69 | $QEMU_IO -c 'write -c -P 42 0 2M' "$TEST_IMG" | _filter_qemu_io |
| 70 | |
| 71 | echo |
| 72 | echo '--- Check ---' |
| 73 | |
| 74 | # This should only print the leaked clusters in the first 4 GB |
| 75 | _check_test_img | grep -v '^Leaked cluster ' |
| 76 | |
| 77 | # success, all done |
| 78 | echo "*** done" |
| 79 | rm -f $seq.full |
| 80 | status=0 |