1#!/usr/bin/env bash 2# group: rw quick 3# 4# Test drive-mirror with quorum 5# 6# The goal of this test is to check how the quorum driver reports 7# regions that are known to read as zeroes (BDRV_BLOCK_ZERO). The idea 8# is that drive-mirror will try the efficient representation of zeroes 9# in the destination image instead of writing actual zeroes. 10# 11# Copyright (C) 2020 Igalia, S.L. 12# Author: Alberto Garcia <berto@igalia.com> 13# 14# This program is free software; you can redistribute it and/or modify 15# it under the terms of the GNU General Public License as published by 16# the Free Software Foundation; either version 2 of the License, or 17# (at your option) any later version. 18# 19# This program is distributed in the hope that it will be useful, 20# but WITHOUT ANY WARRANTY; without even the implied warranty of 21# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 22# GNU General Public License for more details. 23# 24# You should have received a copy of the GNU General Public License 25# along with this program. If not, see <http://www.gnu.org/licenses/>. 26# 27 28# creator 29owner=berto@igalia.com 30 31seq=`basename $0` 32echo "QA output created by $seq" 33 34status=1 # failure is the default! 35 36_cleanup() 37{ 38 _rm_test_img "$TEST_IMG.0" 39 _rm_test_img "$TEST_IMG.1" 40 _rm_test_img "$TEST_IMG.2" 41 _rm_test_img "$TEST_IMG.3" 42 _cleanup_qemu 43} 44trap "_cleanup; exit \$status" 0 1 2 3 15 45 46# get standard environment, filters and checks 47. ./common.rc 48. ./common.filter 49. ./common.qemu 50 51_supported_fmt qcow2 52_supported_proto file 53_supported_os Linux 54_unsupported_imgopts cluster_size data_file 55_require_drivers quorum 56 57echo 58echo '### Create all images' # three source (quorum), one destination 59echo 60TEST_IMG="$TEST_IMG.0" _make_test_img -o cluster_size=64k 10M 61TEST_IMG="$TEST_IMG.1" _make_test_img -o cluster_size=64k 10M 62TEST_IMG="$TEST_IMG.2" _make_test_img -o cluster_size=64k 10M 63TEST_IMG="$TEST_IMG.3" _make_test_img -o cluster_size=64k 10M 64 65quorum="driver=raw,file.driver=quorum,file.vote-threshold=2" 66quorum="$quorum,file.children.0.file.filename=$TEST_IMG.0" 67quorum="$quorum,file.children.1.file.filename=$TEST_IMG.1" 68quorum="$quorum,file.children.2.file.filename=$TEST_IMG.2" 69quorum="$quorum,file.children.0.driver=$IMGFMT" 70quorum="$quorum,file.children.1.driver=$IMGFMT" 71quorum="$quorum,file.children.2.driver=$IMGFMT" 72 73echo 74echo '### Output of qemu-img map (empty quorum)' 75echo 76$QEMU_IMG map --image-opts $quorum | _filter_qemu_img_map 77 78# Now we write data to the quorum. All three images will read as 79# zeroes in all cases, but with different ways to represent them 80# (unallocated clusters, zero clusters, data clusters with zeroes) 81# that will have an effect on how the data will be mirrored and the 82# output of qemu-img map on the resulting image. 83echo 84echo '### Write data to the quorum' 85echo 86# Test 1: data regions surrounded by unallocated clusters. 87# Three data regions, the largest one (0x30000) will be picked, end result: 88# offset 0x10000, length 0x30000 -> data 89$QEMU_IO -c "write -P 0 $((0x10000)) $((0x10000))" "$TEST_IMG.0" | _filter_qemu_io 90$QEMU_IO -c "write -P 0 $((0x10000)) $((0x30000))" "$TEST_IMG.1" | _filter_qemu_io 91$QEMU_IO -c "write -P 0 $((0x10000)) $((0x20000))" "$TEST_IMG.2" | _filter_qemu_io 92 93# Test 2: zero regions surrounded by data clusters. 94# First we allocate the data clusters. 95$QEMU_IO -c "open -o $quorum" -c "write -P 0 $((0x100000)) $((0x40000))" | _filter_qemu_io 96 97# Three zero regions, the smallest one (0x10000) will be picked, end result: 98# offset 0x100000, length 0x10000 -> data 99# offset 0x110000, length 0x10000 -> zeroes 100# offset 0x120000, length 0x20000 -> data 101$QEMU_IO -c "write -z $((0x110000)) $((0x10000))" "$TEST_IMG.0" | _filter_qemu_io 102$QEMU_IO -c "write -z $((0x110000)) $((0x30000))" "$TEST_IMG.1" | _filter_qemu_io 103$QEMU_IO -c "write -z $((0x110000)) $((0x20000))" "$TEST_IMG.2" | _filter_qemu_io 104 105# Test 3: zero clusters surrounded by unallocated clusters. 106# Everything reads as zeroes, no effect on the end result. 107$QEMU_IO -c "write -z $((0x150000)) $((0x10000))" "$TEST_IMG.0" | _filter_qemu_io 108$QEMU_IO -c "write -z $((0x150000)) $((0x30000))" "$TEST_IMG.1" | _filter_qemu_io 109$QEMU_IO -c "write -z $((0x150000)) $((0x20000))" "$TEST_IMG.2" | _filter_qemu_io 110 111# Test 4: mix of data and zero clusters. 112# The zero region will be ignored in favor of the largest data region 113# (0x20000), end result: 114# offset 0x200000, length 0x20000 -> data 115$QEMU_IO -c "write -P 0 $((0x200000)) $((0x10000))" "$TEST_IMG.0" | _filter_qemu_io 116$QEMU_IO -c "write -z $((0x200000)) $((0x30000))" "$TEST_IMG.1" | _filter_qemu_io 117$QEMU_IO -c "write -P 0 $((0x200000)) $((0x20000))" "$TEST_IMG.2" | _filter_qemu_io 118 119# Test 5: write data to a region and then zeroize it, doing it 120# directly on the quorum device instead of the individual images. 121# This has no effect on the end result but proves that the quorum driver 122# supports 'write -z'. 123$QEMU_IO -c "open -o $quorum" -c "write -P 1 $((0x250000)) $((0x10000))" | _filter_qemu_io 124# Verify the data that we just wrote 125$QEMU_IO -c "open -o $quorum" -c "read -P 1 $((0x250000)) $((0x10000))" | _filter_qemu_io 126$QEMU_IO -c "open -o $quorum" -c "write -z $((0x250000)) $((0x10000))" | _filter_qemu_io 127# Now it should read back as zeroes 128$QEMU_IO -c "open -o $quorum" -c "read -P 0 $((0x250000)) $((0x10000))" | _filter_qemu_io 129 130echo 131echo '### Launch the drive-mirror job' 132echo 133qemu_comm_method="qmp" _launch_qemu -drive if=virtio,"$quorum" 134h=$QEMU_HANDLE 135_send_qemu_cmd $h "{ 'execute': 'qmp_capabilities' }" 'return' 136 137_send_qemu_cmd $h \ 138 "{'execute': 'drive-mirror', 139 'arguments': {'device': 'virtio0', 140 'format': '$IMGFMT', 141 'target': '$TEST_IMG.3', 142 'sync': 'full', 143 'mode': 'existing' }}" \ 144 "BLOCK_JOB_READY.*virtio0" 145 146_send_qemu_cmd $h \ 147 "{ 'execute': 'block-job-complete', 148 'arguments': { 'device': 'virtio0' } }" \ 149 'BLOCK_JOB_COMPLETED' 150 151_send_qemu_cmd $h "{ 'execute': 'quit' }" '' 152 153echo 154echo '### Output of qemu-img map (destination image)' 155echo 156$QEMU_IMG map "$TEST_IMG.3" | _filter_qemu_img_map 157 158# success, all done 159echo "*** done" 160rm -f $seq.full 161status=0 162