1#!/bin/bash 2# 3# Commit changes into backing chains and empty the top image if the 4# backing image is not explicitly specified. 5# 6# Variant of 097, which includes snapshots and persistent bitmaps, to 7# tickle the slow codepath in qcow2. See also 198, for another feature 8# that tickles the slow codepath. 9# 10# Copyright (C) 2014, 2017 Red Hat, Inc. 11# 12# This program is free software; you can redistribute it and/or modify 13# it under the terms of the GNU General Public License as published by 14# the Free Software Foundation; either version 2 of the License, or 15# (at your option) any later version. 16# 17# This program is distributed in the hope that it will be useful, 18# but WITHOUT ANY WARRANTY; without even the implied warranty of 19# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20# GNU General Public License for more details. 21# 22# You should have received a copy of the GNU General Public License 23# along with this program. If not, see <http://www.gnu.org/licenses/>. 24# 25 26# creator 27owner=mreitz@redhat.com 28 29seq="$(basename $0)" 30echo "QA output created by $seq" 31 32here="$PWD" 33status=1 # failure is the default! 34 35_cleanup() 36{ 37 _cleanup_test_img 38 _rm_test_img "$TEST_IMG.itmd" 39} 40trap "_cleanup; exit \$status" 0 1 2 3 15 41 42# get standard environment, filters and checks 43. ./common.rc 44. ./common.filter 45. ./common.pattern 46 47# This test is specific to qcow2 48_supported_fmt qcow2 49_supported_proto file 50_supported_os Linux 51 52function run_qemu() 53{ 54 $QEMU -nographic -qmp stdio -serial none "$@" 2>&1 \ 55 | _filter_testdir | _filter_qmp | _filter_qemu \ 56 | sed 's/"sha256": ".\{64\}"/"sha256": HASH/' 57} 58 59for reason in snapshot bitmap; do 60 61# Four passes: 62# 0: Two-layer backing chain, commit to upper backing file (implicitly) 63# (in this case, the top image will be emptied) 64# 1: Two-layer backing chain, commit to upper backing file (explicitly) 65# (in this case, the top image will implicitly stay unchanged) 66# 2: Two-layer backing chain, commit to upper backing file (implicitly with -d) 67# (in this case, the top image will explicitly stay unchanged) 68# 3: Two-layer backing chain, commit to lower backing file 69# (in this case, the top image will implicitly stay unchanged) 70# 71# 020 already tests committing, so this only tests whether image chains are 72# working properly and that all images above the base are emptied; therefore, 73# no complicated patterns are necessary. Check near the 2G mark, as qcow2 74# has been buggy at that boundary in the past. 75for i in 0 1 2 3; do 76 77echo 78echo "=== Test pass $reason.$i ===" 79echo 80 81len=$((2100 * 1024 * 1024 + 512)) # larger than 2G, and not cluster aligned 82TEST_IMG="$TEST_IMG.base" _make_test_img $len 83TEST_IMG="$TEST_IMG.itmd" _make_test_img -b "$TEST_IMG.base" $len 84_make_test_img -b "$TEST_IMG.itmd" $len 85# Update the top image to use a feature that is incompatible with fast path 86case $reason in 87 snapshot) $QEMU_IMG snapshot -c snap "$TEST_IMG" ;; 88 bitmap) 89 run_qemu <<EOF 90{ "execute": "qmp_capabilities" } 91{ "execute": "blockdev-add", 92 "arguments": { "driver": "qcow2", "node-name": "drive0", 93 "file": { "driver": "file", "filename": "$TEST_IMG" } } } 94{ "execute": "block-dirty-bitmap-add", 95 "arguments": { "node": "drive0", "name": "bitmap0", 96 "persistent": true, "autoload": true } } 97{ "execute": "quit" } 98EOF 99 ;; 100esac 101 102$QEMU_IO -c "write -P 1 0x7ffd0000 192k" "$TEST_IMG.base" | _filter_qemu_io 103$QEMU_IO -c "write -P 2 0x7ffe0000 128k" "$TEST_IMG.itmd" | _filter_qemu_io 104$QEMU_IO -c "write -P 3 0x7fff0000 64k" "$TEST_IMG" | _filter_qemu_io 105$QEMU_IO -c "write -P 4 $(($len - 512)) 512" "$TEST_IMG" | _filter_qemu_io 106 107if [ $i -lt 3 ]; then 108 if [ $i == 0 ]; then 109 # -b "$TEST_IMG.itmd" should be the default (that is, committing to the 110 # first backing file in the chain) 111 $QEMU_IMG commit "$TEST_IMG" 112 elif [ $i == 1 ]; then 113 # explicitly specify the commit target (this should imply -d) 114 $QEMU_IMG commit -b "$TEST_IMG.itmd" "$TEST_IMG" 115 else 116 # do not explicitly specify the commit target, but use -d to leave the 117 # top image unchanged 118 $QEMU_IMG commit -d "$TEST_IMG" 119 fi 120 121 # Bottom should be unchanged 122 $QEMU_IO -c 'read -P 1 0x7ffd0000 192k' "$TEST_IMG.base" | _filter_qemu_io 123 $QEMU_IO -c "read -P 0 $((len - 512)) 512" "$TEST_IMG.base" | _filter_qemu_io 124 125 # Intermediate should contain changes from top 126 $QEMU_IO -c 'read -P 1 0x7ffd0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io 127 $QEMU_IO -c 'read -P 2 0x7ffe0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io 128 $QEMU_IO -c 'read -P 3 0x7fff0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io 129 $QEMU_IO -c "read -P 4 $((len - 512)) 512" "$TEST_IMG.itmd" | _filter_qemu_io 130 131 # And in pass 0, the top image should be empty, whereas in both other passes 132 # it should be unchanged (which is both checked by qemu-img map) 133else 134 $QEMU_IMG commit -b "$TEST_IMG.base" "$TEST_IMG" 135 136 # Bottom should contain all changes 137 $QEMU_IO -c 'read -P 1 0x7ffd0000 64k' "$TEST_IMG.base" | _filter_qemu_io 138 $QEMU_IO -c 'read -P 2 0x7ffe0000 64k' "$TEST_IMG.base" | _filter_qemu_io 139 $QEMU_IO -c 'read -P 3 0x7fff0000 64k' "$TEST_IMG.base" | _filter_qemu_io 140 $QEMU_IO -c "read -P 4 $((len - 512)) 512" "$TEST_IMG.base" | _filter_qemu_io 141 142 # Both top and intermediate should be unchanged 143fi 144 145$QEMU_IMG map "$TEST_IMG.base" | _filter_qemu_img_map 146$QEMU_IMG map "$TEST_IMG.itmd" | _filter_qemu_img_map 147$QEMU_IMG map "$TEST_IMG" | _filter_qemu_img_map 148 149# Check that the reason for slow path is still present, as appropriate 150case $reason in 151 snapshot) 152 $QEMU_IMG snapshot -l "$TEST_IMG" | 153 sed 's/^\(.\{20\}\).*/\1/; s/ *$//' ;; 154 bitmap) 155 run_qemu <<EOF 156{ "execute": "qmp_capabilities" } 157{ "execute": "blockdev-add", 158 "arguments": { "driver": "qcow2", "node-name": "drive0", 159 "file": { "driver": "file", "filename": "$TEST_IMG" } } } 160{ "execute": "x-debug-block-dirty-bitmap-sha256", 161 "arguments": { "node": "drive0", "name": "bitmap0" } } 162{ "execute": "quit" } 163EOF 164 ;; 165esac 166 167done 168done 169 170# success, all done 171echo "*** done" 172rm -f $seq.full 173status=0 174