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# Persistent dirty bitmaps require compat=1.1 52_unsupported_imgopts 'compat=0.10' 53 54function run_qemu() 55{ 56 $QEMU -nographic -qmp stdio -serial none "$@" 2>&1 \ 57 | _filter_testdir | _filter_qmp | _filter_qemu \ 58 | sed 's/"sha256": ".\{64\}"/"sha256": HASH/' 59} 60 61for reason in snapshot bitmap; do 62 63# Four passes: 64# 0: Two-layer backing chain, commit to upper backing file (implicitly) 65# (in this case, the top image will be emptied) 66# 1: Two-layer backing chain, commit to upper backing file (explicitly) 67# (in this case, the top image will implicitly stay unchanged) 68# 2: Two-layer backing chain, commit to upper backing file (implicitly with -d) 69# (in this case, the top image will explicitly stay unchanged) 70# 3: Two-layer backing chain, commit to lower backing file 71# (in this case, the top image will implicitly stay unchanged) 72# 73# 020 already tests committing, so this only tests whether image chains are 74# working properly and that all images above the base are emptied; therefore, 75# no complicated patterns are necessary. Check near the 2G mark, as qcow2 76# has been buggy at that boundary in the past. 77for i in 0 1 2 3; do 78 79echo 80echo "=== Test pass $reason.$i ===" 81echo 82 83len=$((2100 * 1024 * 1024 + 512)) # larger than 2G, and not cluster aligned 84TEST_IMG="$TEST_IMG.base" _make_test_img $len 85TEST_IMG="$TEST_IMG.itmd" _make_test_img -b "$TEST_IMG.base" $len 86_make_test_img -b "$TEST_IMG.itmd" $len 87# Update the top image to use a feature that is incompatible with fast path 88case $reason in 89 snapshot) $QEMU_IMG snapshot -c snap "$TEST_IMG" ;; 90 bitmap) 91 run_qemu <<EOF 92{ "execute": "qmp_capabilities" } 93{ "execute": "blockdev-add", 94 "arguments": { "driver": "qcow2", "node-name": "drive0", 95 "file": { "driver": "file", "filename": "$TEST_IMG" } } } 96{ "execute": "block-dirty-bitmap-add", 97 "arguments": { "node": "drive0", "name": "bitmap0", 98 "persistent": true, "autoload": true } } 99{ "execute": "quit" } 100EOF 101 ;; 102esac 103 104$QEMU_IO -c "write -P 1 0x7ffd0000 192k" "$TEST_IMG.base" | _filter_qemu_io 105$QEMU_IO -c "write -P 2 0x7ffe0000 128k" "$TEST_IMG.itmd" | _filter_qemu_io 106$QEMU_IO -c "write -P 3 0x7fff0000 64k" "$TEST_IMG" | _filter_qemu_io 107$QEMU_IO -c "write -P 4 $(($len - 512)) 512" "$TEST_IMG" | _filter_qemu_io 108 109if [ $i -lt 3 ]; then 110 if [ $i == 0 ]; then 111 # -b "$TEST_IMG.itmd" should be the default (that is, committing to the 112 # first backing file in the chain) 113 $QEMU_IMG commit "$TEST_IMG" 114 elif [ $i == 1 ]; then 115 # explicitly specify the commit target (this should imply -d) 116 $QEMU_IMG commit -b "$TEST_IMG.itmd" "$TEST_IMG" 117 else 118 # do not explicitly specify the commit target, but use -d to leave the 119 # top image unchanged 120 $QEMU_IMG commit -d "$TEST_IMG" 121 fi 122 123 # Bottom should be unchanged 124 $QEMU_IO -c 'read -P 1 0x7ffd0000 192k' "$TEST_IMG.base" | _filter_qemu_io 125 $QEMU_IO -c "read -P 0 $((len - 512)) 512" "$TEST_IMG.base" | _filter_qemu_io 126 127 # Intermediate should contain changes from top 128 $QEMU_IO -c 'read -P 1 0x7ffd0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io 129 $QEMU_IO -c 'read -P 2 0x7ffe0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io 130 $QEMU_IO -c 'read -P 3 0x7fff0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io 131 $QEMU_IO -c "read -P 4 $((len - 512)) 512" "$TEST_IMG.itmd" | _filter_qemu_io 132 133 # And in pass 0, the top image should be empty, whereas in both other passes 134 # it should be unchanged (which is both checked by qemu-img map) 135else 136 $QEMU_IMG commit -b "$TEST_IMG.base" "$TEST_IMG" 137 138 # Bottom should contain all changes 139 $QEMU_IO -c 'read -P 1 0x7ffd0000 64k' "$TEST_IMG.base" | _filter_qemu_io 140 $QEMU_IO -c 'read -P 2 0x7ffe0000 64k' "$TEST_IMG.base" | _filter_qemu_io 141 $QEMU_IO -c 'read -P 3 0x7fff0000 64k' "$TEST_IMG.base" | _filter_qemu_io 142 $QEMU_IO -c "read -P 4 $((len - 512)) 512" "$TEST_IMG.base" | _filter_qemu_io 143 144 # Both top and intermediate should be unchanged 145fi 146 147$QEMU_IMG map "$TEST_IMG.base" | _filter_qemu_img_map 148$QEMU_IMG map "$TEST_IMG.itmd" | _filter_qemu_img_map 149$QEMU_IMG map "$TEST_IMG" | _filter_qemu_img_map 150 151# Check that the reason for slow path is still present, as appropriate 152case $reason in 153 snapshot) 154 $QEMU_IMG snapshot -l "$TEST_IMG" | 155 sed 's/^\(.\{20\}\).*/\1/; s/ *$//' ;; 156 bitmap) 157 run_qemu <<EOF 158{ "execute": "qmp_capabilities" } 159{ "execute": "blockdev-add", 160 "arguments": { "driver": "qcow2", "node-name": "drive0", 161 "file": { "driver": "file", "filename": "$TEST_IMG" } } } 162{ "execute": "x-debug-block-dirty-bitmap-sha256", 163 "arguments": { "node": "drive0", "name": "bitmap0" } } 164{ "execute": "quit" } 165EOF 166 ;; 167esac 168 169done 170done 171 172# success, all done 173echo "*** done" 174rm -f $seq.full 175status=0 176