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