| 1 | #!/usr/bin/env bash |
| 2 | # group: rw auto quick |
| 3 | # |
| 4 | # Test for the regression fixed in commit c8bf9a9169 |
| 5 | # |
| 6 | # Copyright (C) 2020 Igalia, S.L. |
| 7 | # Author: Alberto Garcia <berto@igalia.com> |
| 8 | # Based on a test case by Maxim Levitsky <mlevitsk@redhat.com> |
| 9 | # |
| 10 | # This program is free software; you can redistribute it and/or modify |
| 11 | # it under the terms of the GNU General Public License as published by |
| 12 | # the Free Software Foundation; either version 2 of the License, or |
| 13 | # (at your option) any later version. |
| 14 | # |
| 15 | # This program is distributed in the hope that it will be useful, |
| 16 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | # GNU General Public License for more details. |
| 19 | # |
| 20 | # You should have received a copy of the GNU General Public License |
| 21 | # along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 22 | # |
| 23 | |
| 24 | # creator |
| 25 | owner=berto@igalia.com |
| 26 | |
| 27 | seq=`basename $0` |
| 28 | echo "QA output created by $seq" |
| 29 | |
| 30 | status=1 # failure is the default! |
| 31 | |
| 32 | _cleanup() |
| 33 | { |
| 34 | _cleanup_test_img |
| 35 | } |
| 36 | trap "_cleanup; exit \$status" 0 1 2 3 15 |
| 37 | |
| 38 | # get standard environment, filters and checks |
| 39 | . ./common.rc |
| 40 | . ./common.filter |
| 41 | |
| 42 | _supported_fmt qcow2 |
| 43 | _supported_proto file |
| 44 | _supported_os Linux |
| 45 | _unsupported_imgopts cluster_size refcount_bits extended_l2 compat=0.10 data_file |
| 46 | |
| 47 | # The cluster size must be at least the granularity of the mirror job (4KB) |
| 48 | # Note that larger cluster sizes will produce very large images (several GBs) |
| 49 | cluster_size=4096 |
| 50 | refcount_bits=64 # Make it equal to the L2 entry size for convenience |
| 51 | options="cluster_size=${cluster_size},refcount_bits=${refcount_bits}" |
| 52 | |
| 53 | # Number of refcount entries per refcount blocks |
| 54 | ref_entries=$(( ${cluster_size} * 8 / ${refcount_bits} )) |
| 55 | |
| 56 | # Number of data clusters needed to fill a refcount block |
| 57 | # Equals ${ref_entries} minus two (one L2 table and one refcount block) |
| 58 | data_clusters_per_refblock=$(( ${ref_entries} - 2 )) |
| 59 | |
| 60 | # Number of entries in the refcount cache |
| 61 | ref_blocks=4 |
| 62 | |
| 63 | # Write enough data clusters to fill the refcount cache and allocate |
| 64 | # one more refcount block. |
| 65 | # Subtract 3 clusters from the total: qcow2 header, refcount table, L1 table |
| 66 | total_data_clusters=$(( ${data_clusters_per_refblock} * ${ref_blocks} + 1 - 3 )) |
| 67 | |
| 68 | # Total size to write in bytes |
| 69 | total_size=$(( ${total_data_clusters} * ${cluster_size} )) |
| 70 | |
| 71 | echo |
| 72 | echo '### Create the image' |
| 73 | echo |
| 74 | TEST_IMG_FILE=$TEST_IMG.base _make_test_img -o $options $total_size | _filter_img_create_size |
| 75 | |
| 76 | echo |
| 77 | echo '### Write data to allocate more refcount blocks than the cache can hold' |
| 78 | echo |
| 79 | $QEMU_IO -c "write -P 1 0 $total_size" $TEST_IMG.base | _filter_qemu_io |
| 80 | |
| 81 | echo |
| 82 | echo '### Create an overlay' |
| 83 | echo |
| 84 | _make_test_img -F $IMGFMT -b $TEST_IMG.base -o $options | _filter_img_create_size |
| 85 | |
| 86 | echo |
| 87 | echo '### Fill the overlay with zeroes' |
| 88 | echo |
| 89 | $QEMU_IO -c "write -z 0 $total_size" $TEST_IMG | _filter_qemu_io |
| 90 | |
| 91 | echo |
| 92 | echo '### Commit changes to the base image' |
| 93 | echo |
| 94 | $QEMU_IMG commit $TEST_IMG |
| 95 | |
| 96 | echo |
| 97 | echo '### Check the base image' |
| 98 | echo |
| 99 | $QEMU_IMG check $TEST_IMG.base |
| 100 | |
| 101 | # success, all done |
| 102 | echo "*** done" |
| 103 | rm -f $seq.full |
| 104 | status=0 |