| #!/usr/bin/env bash | |
| # group: rw auto quick | |
| # | |
| # Test for the regression fixed in commit c8bf9a9169 | |
| # | |
| # Copyright (C) 2020 Igalia, S.L. | |
| # Author: Alberto Garcia <berto@igalia.com> | |
| # Based on a test case by Maxim Levitsky <mlevitsk@redhat.com> | |
| # | |
| # This program is free software; you can redistribute it and/or modify | |
| # it under the terms of the GNU General Public License as published by | |
| # the Free Software Foundation; either version 2 of the License, or | |
| # (at your option) any later version. | |
| # | |
| # This program is distributed in the hope that it will be useful, | |
| # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| # GNU General Public License for more details. | |
| # | |
| # You should have received a copy of the GNU General Public License | |
| # along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| # | |
| # creator | |
| owner=berto@igalia.com | |
| seq=`basename $0` | |
| echo "QA output created by $seq" | |
| status=1 # failure is the default! | |
| _cleanup() | |
| { | |
| _cleanup_test_img | |
| } | |
| trap "_cleanup; exit \$status" 0 1 2 3 15 | |
| # get standard environment, filters and checks | |
| . ./common.rc | |
| . ./common.filter | |
| _supported_fmt qcow2 | |
| _supported_proto file | |
| _supported_os Linux | |
| _unsupported_imgopts cluster_size refcount_bits extended_l2 compat=0.10 data_file | |
| # The cluster size must be at least the granularity of the mirror job (4KB) | |
| # Note that larger cluster sizes will produce very large images (several GBs) | |
| cluster_size=4096 | |
| refcount_bits=64 # Make it equal to the L2 entry size for convenience | |
| options="cluster_size=${cluster_size},refcount_bits=${refcount_bits}" | |
| # Number of refcount entries per refcount blocks | |
| ref_entries=$(( ${cluster_size} * 8 / ${refcount_bits} )) | |
| # Number of data clusters needed to fill a refcount block | |
| # Equals ${ref_entries} minus two (one L2 table and one refcount block) | |
| data_clusters_per_refblock=$(( ${ref_entries} - 2 )) | |
| # Number of entries in the refcount cache | |
| ref_blocks=4 | |
| # Write enough data clusters to fill the refcount cache and allocate | |
| # one more refcount block. | |
| # Subtract 3 clusters from the total: qcow2 header, refcount table, L1 table | |
| total_data_clusters=$(( ${data_clusters_per_refblock} * ${ref_blocks} + 1 - 3 )) | |
| # Total size to write in bytes | |
| total_size=$(( ${total_data_clusters} * ${cluster_size} )) | |
| echo | |
| echo '### Create the image' | |
| echo | |
| TEST_IMG_FILE=$TEST_IMG.base _make_test_img -o $options $total_size | _filter_img_create_size | |
| echo | |
| echo '### Write data to allocate more refcount blocks than the cache can hold' | |
| echo | |
| $QEMU_IO -c "write -P 1 0 $total_size" $TEST_IMG.base | _filter_qemu_io | |
| echo | |
| echo '### Create an overlay' | |
| echo | |
| _make_test_img -F $IMGFMT -b $TEST_IMG.base -o $options | _filter_img_create_size | |
| echo | |
| echo '### Fill the overlay with zeroes' | |
| echo | |
| $QEMU_IO -c "write -z 0 $total_size" $TEST_IMG | _filter_qemu_io | |
| echo | |
| echo '### Commit changes to the base image' | |
| echo | |
| $QEMU_IMG commit $TEST_IMG | |
| echo | |
| echo '### Check the base image' | |
| echo | |
| $QEMU_IMG check $TEST_IMG.base | |
| # success, all done | |
| echo "*** done" | |
| rm -f $seq.full | |
| status=0 |