#!/usr/bin/env bash # group: rw backing auto quick # # Test qemu-img rebase with compression # # Copyright (c) 2023 Virtuozzo International GmbH. # # 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=andrey.drobyshev@virtuozzo.com seq=`basename $0` echo "QA output created by $seq" status=1 # failure is the default! _cleanup() { _cleanup_test_img _rm_test_img "$TEST_IMG.base" _rm_test_img "$TEST_IMG.itmd" } trap "_cleanup; exit \$status" 0 1 2 3 15 # get standard environment, filters and checks . ./common.rc . ./common.filter _supported_fmt qcow2 _supported_proto file _supported_os Linux # Want the size divisible by 2 and 3 size=$(( 48 * 1024 * 1024 )) half_size=$(( size / 2 )) third_size=$(( size / 3 )) # 1. "qemu-img rebase -c" should refuse working with any format which doesn't # support compression. We only check "-f raw" here. echo echo "=== Testing compressed rebase format compatibility ===" echo $QEMU_IMG create -f raw "$TEST_IMG" "$size" | _filter_img_create $QEMU_IMG rebase -c -f raw -b "" "$TEST_IMG" # 2. Write the 1st half of $size to backing file (compressed), 2nd half -- to # the top image (also compressed). Rebase the top image onto no backing file, # with compression (i.e. "qemu-img -c -b ''"). Check that the resulting image # has the written data preserved, and "qemu-img check" reports 100% clusters # as compressed. echo echo "=== Testing rebase with compression onto no backing file ===" echo TEST_IMG="$TEST_IMG.base" _make_test_img $size _make_test_img -b "$TEST_IMG.base" -F $IMGFMT $size $QEMU_IO -c "write -c -P 0xaa 0 $half_size" "$TEST_IMG.base" | _filter_qemu_io $QEMU_IO -c "write -c -P 0xbb $half_size $half_size" "$TEST_IMG" \ | _filter_qemu_io $QEMU_IMG rebase -c -f $IMGFMT -b "" "$TEST_IMG" $QEMU_IO -c "read -P 0xaa 0 $half_size" "$TEST_IMG" | _filter_qemu_io $QEMU_IO -c "read -P 0xbb $half_size $half_size" "$TEST_IMG" | _filter_qemu_io $QEMU_IMG check "$TEST_IMG" | _filter_testdir # 3. Same as the previous one, but with raw backing file (hence write to # the backing is uncompressed). echo echo "=== Testing rebase with compression with raw backing file ===" echo $QEMU_IMG create -f raw "$TEST_IMG.base" "$half_size" | _filter_img_create _make_test_img -b "$TEST_IMG.base" -F raw $size $QEMU_IO -f raw -c "write -P 0xaa 0 $half_size" "$TEST_IMG.base" \ | _filter_qemu_io $QEMU_IO -c "write -c -P 0xbb $half_size $half_size" \ "$TEST_IMG" | _filter_qemu_io $QEMU_IMG rebase -c -f $IMGFMT -b "" "$TEST_IMG" $QEMU_IO -c "read -P 0xaa 0 $half_size" "$TEST_IMG" | _filter_qemu_io $QEMU_IO -c "read -P 0xbb $half_size $half_size" "$TEST_IMG" | _filter_qemu_io $QEMU_IMG check "$TEST_IMG" | _filter_testdir # 4. Create a backing chain base<--itmd<--img, filling 1st, 2nd and 3rd # thirds of them, respectively (with compression). Rebase img onto base, # effectively deleting itmd from the chain, and check that written data is # preserved in the resulting image. Also check that "qemu-img check" reports # 100% clusters as compressed. echo echo "=== Testing compressed rebase removing single delta from the chain ===" echo TEST_IMG="$TEST_IMG.base" _make_test_img $size TEST_IMG="$TEST_IMG.itmd" _make_test_img -b "$TEST_IMG.base" -F $IMGFMT $size _make_test_img -b "$TEST_IMG.itmd" -F $IMGFMT $size $QEMU_IO -c "write -c -P 0xaa 0 $third_size" \ "$TEST_IMG.base" | _filter_qemu_io $QEMU_IO -c "write -c -P 0xbb $third_size $third_size" \ "$TEST_IMG.itmd" | _filter_qemu_io $QEMU_IO -c "write -c -P 0xcc $((third_size * 2 )) $third_size" \ "$TEST_IMG" | _filter_qemu_io $QEMU_IMG rebase -c -f $IMGFMT -b "$TEST_IMG.base" -F $IMGFMT "$TEST_IMG" $QEMU_IO -c "read -P 0xaa 0 $third_size" "$TEST_IMG" | _filter_qemu_io $QEMU_IO -c "read -P 0xbb $third_size $third_size" \ "$TEST_IMG" | _filter_qemu_io $QEMU_IO -c "read -P 0xcc $(( third_size * 2 )) $third_size" \ "$TEST_IMG" | _filter_qemu_io $QEMU_IMG check "$TEST_IMG" | _filter_testdir # 5. Create one-cluster backing and overlay images, and fill only the first # (half - 1) bytes of the backing with data (uncompressed). Rebase the # overlay onto no backing file with compression. Check that data is still # read correctly, and that cluster is now really compressed ("qemu-img check" # reports 100% clusters as compressed. echo echo "=== Testing compressed rebase with unaligned unmerged data ===" echo CLUSTER_SIZE=65536 TEST_IMG="$TEST_IMG.base" _make_test_img $CLUSTER_SIZE _make_test_img -b "$TEST_IMG.base" -F $IMGFMT $CLUSTER_SIZE $QEMU_IO -c "write -P 0xaa 0 $(( CLUSTER_SIZE / 2 - 1 ))" $TEST_IMG.base \ | _filter_qemu_io $QEMU_IMG rebase -c -f $IMGFMT -b "" "$TEST_IMG" $QEMU_IO -c "read -P 0xaa 0 $(( CLUSTER_SIZE / 2 - 1 ))" "$TEST_IMG" \ | _filter_qemu_io $QEMU_IO -c \ "read -P 0x00 $(( CLUSTER_SIZE / 2 - 1 )) $(( CLUSTER_SIZE / 2 + 1 ))" \ "$TEST_IMG" | _filter_qemu_io $QEMU_IMG check "$TEST_IMG" | _filter_testdir # success, all done echo echo '*** done' rm -f $seq.full status=0