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 $seq" 31 32status=1 # failure is the default! 33 34_cleanup() 35{ 36 _cleanup_test_img 37 _rm_test_img "$TEST_IMG.itmd" 38} 39trap "_cleanup; exit \$status" 0 1 2 3 15 40 41# get standard environment, filters and checks 42. ./common.rc 43. ./common.filter 44. ./common.pattern 45 46# This test is specific to qcow2 47_supported_fmt qcow2 48_supported_proto file 49_supported_os Linux 50# Persistent dirty bitmaps require compat=1.1 51_unsupported_imgopts 'compat=0.10' 52 53run_qemu() 54{ 55 $QEMU -nographic -qmp stdio -serial none "$@" 2>&1 \ 56 | _filter_testdir | _filter_qmp | _filter_qemu \ 57 | sed 's/"sha256": ".\{64\}"/"sha256": HASH/' 58} 59 60for reason in snapshot bitmap; do 61 62# Four passes: 63# 0: Two-layer backing chain, commit to upper backing file (implicitly) 64# (in this case, the top image will be emptied) 65# 1: Two-layer backing chain, commit to upper backing file (explicitly) 66# (in this case, the top image will implicitly stay unchanged) 67# 2: Two-layer backing chain, commit to upper backing file (implicitly with -d) 68# (in this case, the top image will explicitly stay unchanged) 69# 3: Two-layer backing chain, commit to lower backing file 70# (in this case, the top image will implicitly stay unchanged) 71# 72# 020 already tests committing, so this only tests whether image chains are 73# working properly and that all images above the base are emptied; therefore, 74# no complicated patterns are necessary. Check near the 2G mark, as qcow2 75# has been buggy at that boundary in the past. 76for i in 0 1 2 3; do 77 78echo 79echo "=== Test pass $reason.$i ===" 80echo 81 82len=$((2100 * 1024 * 1024 + 512)) # larger than 2G, and not cluster aligned 83TEST_IMG="$TEST_IMG.base" _make_test_img $len 84TEST_IMG="$TEST_IMG.itmd" _make_test_img -b "$TEST_IMG.base" $len 85_make_test_img -b "$TEST_IMG.itmd" $len 86# Update the top image to use a feature that is incompatible with fast path 87case $reason in 88 snapshot) $QEMU_IMG snapshot -c snap "$TEST_IMG" ;; 89 bitmap) 90 run_qemu <<EOF 91{ "execute": "qmp_capabilities" } 92{ "execute": "blockdev-add", 93 "arguments": { "driver": "qcow2", "node-name": "drive0", 94 "file": { "driver": "file", "filename": "$TEST_IMG" } } } 95{ "execute": "block-dirty-bitmap-add", 96 "arguments": { "node": "drive0", "name": "bitmap0", 97 "persistent": true } } 98{ "execute": "quit" } 99EOF 100 ;; 101esac 102 103$QEMU_IO -c "write -P 1 0x7ffd0000 192k" "$TEST_IMG.base" | _filter_qemu_io 104$QEMU_IO -c "write -P 2 0x7ffe0000 128k" "$TEST_IMG.itmd" | _filter_qemu_io 105$QEMU_IO -c "write -P 3 0x7fff0000 64k" "$TEST_IMG" | _filter_qemu_io 106$QEMU_IO -c "write -P 4 $(($len - 512)) 512" "$TEST_IMG" | _filter_qemu_io 107 108if [ $i -lt 3 ]; then 109 if [ $i == 0 ]; then 110 # -b "$TEST_IMG.itmd" should be the default (that is, committing to the 111 # first backing file in the chain) 112 $QEMU_IMG commit "$TEST_IMG" 113 elif [ $i == 1 ]; then 114 # explicitly specify the commit target (this should imply -d) 115 $QEMU_IMG commit -b "$TEST_IMG.itmd" "$TEST_IMG" 116 else 117 # do not explicitly specify the commit target, but use -d to leave the 118 # top image unchanged 119 $QEMU_IMG commit -d "$TEST_IMG" 120 fi 121 122 # Bottom should be unchanged 123 $QEMU_IO -c 'read -P 1 0x7ffd0000 192k' "$TEST_IMG.base" | _filter_qemu_io 124 $QEMU_IO -c "read -P 0 $((len - 512)) 512" "$TEST_IMG.base" | _filter_qemu_io 125 126 # Intermediate should contain changes from top 127 $QEMU_IO -c 'read -P 1 0x7ffd0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io 128 $QEMU_IO -c 'read -P 2 0x7ffe0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io 129 $QEMU_IO -c 'read -P 3 0x7fff0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io 130 $QEMU_IO -c "read -P 4 $((len - 512)) 512" "$TEST_IMG.itmd" | _filter_qemu_io 131 132 # And in pass 0, the top image should be empty, whereas in both other passes 133 # it should be unchanged (which is both checked by qemu-img map) 134else 135 $QEMU_IMG commit -b "$TEST_IMG.base" "$TEST_IMG" 136 137 # Bottom should contain all changes 138 $QEMU_IO -c 'read -P 1 0x7ffd0000 64k' "$TEST_IMG.base" | _filter_qemu_io 139 $QEMU_IO -c 'read -P 2 0x7ffe0000 64k' "$TEST_IMG.base" | _filter_qemu_io 140 $QEMU_IO -c 'read -P 3 0x7fff0000 64k' "$TEST_IMG.base" | _filter_qemu_io 141 $QEMU_IO -c "read -P 4 $((len - 512)) 512" "$TEST_IMG.base" | _filter_qemu_io 142 143 # Both top and intermediate should be unchanged 144fi 145 146$QEMU_IMG map "$TEST_IMG.base" | _filter_qemu_img_map 147$QEMU_IMG map "$TEST_IMG.itmd" | _filter_qemu_img_map 148$QEMU_IMG map "$TEST_IMG" | _filter_qemu_img_map 149 150# Check that the reason for slow path is still present, as appropriate 151case $reason in 152 snapshot) 153 $QEMU_IMG snapshot -l "$TEST_IMG" | 154 sed 's/^\(.\{20\}\).*/\1/; s/ *$//' ;; 155 bitmap) 156 run_qemu <<EOF 157{ "execute": "qmp_capabilities" } 158{ "execute": "blockdev-add", 159 "arguments": { "driver": "qcow2", "node-name": "drive0", 160 "file": { "driver": "file", "filename": "$TEST_IMG" } } } 161{ "execute": "x-debug-block-dirty-bitmap-sha256", 162 "arguments": { "node": "drive0", "name": "bitmap0" } } 163{ "execute": "quit" } 164EOF 165 ;; 166esac 167 168done 169done 170 171# success, all done 172echo "*** done" 173rm -f $seq.full 174status=0 175