1#!/usr/bin/env bash 2# group: rw backing auto quick 3# 4# Test qemu-img rebase with compression 5# 6# Copyright (c) 2023 Virtuozzo International GmbH. 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# creator 23owner=andrey.drobyshev@virtuozzo.com 24 25seq=`basename $0` 26echo "QA output created by $seq" 27 28status=1 # failure is the default! 29 30_cleanup() 31{ 32 _cleanup_test_img 33 _rm_test_img "$TEST_IMG.base" 34 _rm_test_img "$TEST_IMG.itmd" 35} 36trap "_cleanup; exit \$status" 0 1 2 3 15 37 38# get standard environment, filters and checks 39. ./common.rc 40. ./common.filter 41 42_supported_fmt qcow2 43_supported_proto file 44_supported_os Linux 45 46# Want the size divisible by 2 and 3 47size=$(( 48 * 1024 * 1024 )) 48half_size=$(( size / 2 )) 49third_size=$(( size / 3 )) 50 51# 1. "qemu-img rebase -c" should refuse working with any format which doesn't 52# support compression. We only check "-f raw" here. 53echo 54echo "=== Testing compressed rebase format compatibility ===" 55echo 56 57$QEMU_IMG create -f raw "$TEST_IMG" "$size" | _filter_img_create 58$QEMU_IMG rebase -c -f raw -b "" "$TEST_IMG" 59 60# 2. Write the 1st half of $size to backing file (compressed), 2nd half -- to 61# the top image (also compressed). Rebase the top image onto no backing file, 62# with compression (i.e. "qemu-img -c -b ''"). Check that the resulting image 63# has the written data preserved, and "qemu-img check" reports 100% clusters 64# as compressed. 65echo 66echo "=== Testing rebase with compression onto no backing file ===" 67echo 68 69TEST_IMG="$TEST_IMG.base" _make_test_img $size 70_make_test_img -b "$TEST_IMG.base" -F $IMGFMT $size 71 72$QEMU_IO -c "write -c -P 0xaa 0 $half_size" "$TEST_IMG.base" | _filter_qemu_io 73$QEMU_IO -c "write -c -P 0xbb $half_size $half_size" "$TEST_IMG" \ 74 | _filter_qemu_io 75 76$QEMU_IMG rebase -c -f $IMGFMT -b "" "$TEST_IMG" 77 78$QEMU_IO -c "read -P 0xaa 0 $half_size" "$TEST_IMG" | _filter_qemu_io 79$QEMU_IO -c "read -P 0xbb $half_size $half_size" "$TEST_IMG" | _filter_qemu_io 80 81$QEMU_IMG check "$TEST_IMG" | _filter_testdir 82 83# 3. Same as the previous one, but with raw backing file (hence write to 84# the backing is uncompressed). 85echo 86echo "=== Testing rebase with compression with raw backing file ===" 87echo 88 89$QEMU_IMG create -f raw "$TEST_IMG.base" "$half_size" | _filter_img_create 90_make_test_img -b "$TEST_IMG.base" -F raw $size 91 92$QEMU_IO -f raw -c "write -P 0xaa 0 $half_size" "$TEST_IMG.base" \ 93 | _filter_qemu_io 94$QEMU_IO -c "write -c -P 0xbb $half_size $half_size" \ 95 "$TEST_IMG" | _filter_qemu_io 96 97$QEMU_IMG rebase -c -f $IMGFMT -b "" "$TEST_IMG" 98 99$QEMU_IO -c "read -P 0xaa 0 $half_size" "$TEST_IMG" | _filter_qemu_io 100$QEMU_IO -c "read -P 0xbb $half_size $half_size" "$TEST_IMG" | _filter_qemu_io 101 102$QEMU_IMG check "$TEST_IMG" | _filter_testdir 103 104# 4. Create a backing chain base<--itmd<--img, filling 1st, 2nd and 3rd 105# thirds of them, respectively (with compression). Rebase img onto base, 106# effectively deleting itmd from the chain, and check that written data is 107# preserved in the resulting image. Also check that "qemu-img check" reports 108# 100% clusters as compressed. 109echo 110echo "=== Testing compressed rebase removing single delta from the chain ===" 111echo 112 113TEST_IMG="$TEST_IMG.base" _make_test_img $size 114TEST_IMG="$TEST_IMG.itmd" _make_test_img -b "$TEST_IMG.base" -F $IMGFMT $size 115_make_test_img -b "$TEST_IMG.itmd" -F $IMGFMT $size 116 117$QEMU_IO -c "write -c -P 0xaa 0 $third_size" \ 118 "$TEST_IMG.base" | _filter_qemu_io 119$QEMU_IO -c "write -c -P 0xbb $third_size $third_size" \ 120 "$TEST_IMG.itmd" | _filter_qemu_io 121$QEMU_IO -c "write -c -P 0xcc $((third_size * 2 )) $third_size" \ 122 "$TEST_IMG" | _filter_qemu_io 123 124$QEMU_IMG rebase -c -f $IMGFMT -b "$TEST_IMG.base" -F $IMGFMT "$TEST_IMG" 125 126$QEMU_IO -c "read -P 0xaa 0 $third_size" "$TEST_IMG" | _filter_qemu_io 127$QEMU_IO -c "read -P 0xbb $third_size $third_size" \ 128 "$TEST_IMG" | _filter_qemu_io 129$QEMU_IO -c "read -P 0xcc $(( third_size * 2 )) $third_size" \ 130 "$TEST_IMG" | _filter_qemu_io 131 132$QEMU_IMG check "$TEST_IMG" | _filter_testdir 133 134# 5. Create one-cluster backing and overlay images, and fill only the first 135# (half - 1) bytes of the backing with data (uncompressed). Rebase the 136# overlay onto no backing file with compression. Check that data is still 137# read correctly, and that cluster is now really compressed ("qemu-img check" 138# reports 100% clusters as compressed. 139echo 140echo "=== Testing compressed rebase with unaligned unmerged data ===" 141echo 142 143CLUSTER_SIZE=65536 144 145TEST_IMG="$TEST_IMG.base" _make_test_img $CLUSTER_SIZE 146_make_test_img -b "$TEST_IMG.base" -F $IMGFMT $CLUSTER_SIZE 147 148$QEMU_IO -c "write -P 0xaa 0 $(( CLUSTER_SIZE / 2 - 1 ))" $TEST_IMG.base \ 149 | _filter_qemu_io 150 151$QEMU_IMG rebase -c -f $IMGFMT -b "" "$TEST_IMG" 152 153$QEMU_IO -c "read -P 0xaa 0 $(( CLUSTER_SIZE / 2 - 1 ))" "$TEST_IMG" \ 154 | _filter_qemu_io 155$QEMU_IO -c \ 156 "read -P 0x00 $(( CLUSTER_SIZE / 2 - 1 )) $(( CLUSTER_SIZE / 2 + 1 ))" \ 157 "$TEST_IMG" | _filter_qemu_io 158 159$QEMU_IMG check "$TEST_IMG" | _filter_testdir 160 161# success, all done 162echo 163echo '*** done' 164rm -f $seq.full 165status=0 166