1#!/usr/bin/env bash 2# group: rw auto backing 3# 4# Commit changes into backing chains and empty the top image if the 5# backing image is not explicitly specified. 6# 7# Variant of 097, which includes snapshots and persistent bitmaps, to 8# tickle the slow codepath in qcow2. See also 198, for another feature 9# that tickles the slow codepath. 10# 11# Copyright (C) 2014, 2017 Red Hat, Inc. 12# 13# This program is free software; you can redistribute it and/or modify 14# it under the terms of the GNU General Public License as published by 15# the Free Software Foundation; either version 2 of the License, or 16# (at your option) any later version. 17# 18# This program is distributed in the hope that it will be useful, 19# but WITHOUT ANY WARRANTY; without even the implied warranty of 20# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21# GNU General Public License for more details. 22# 23# You should have received a copy of the GNU General Public License 24# along with this program. If not, see <http://www.gnu.org/licenses/>. 25# 26 27# creator 28owner=mreitz@redhat.com 29 30seq="$(basename $0)" 31echo "QA output created by $seq" 32 33status=1 # failure is the default! 34 35_cleanup() 36{ 37 _cleanup_test_img 38 _rm_test_img "$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 fuse 50_supported_os Linux 51# Persistent dirty bitmaps require compat=1.1; 52# Internal snapshots forbid using an external data file 53# (they work with refcount_bits=1 here, though, because there actually 54# is no data when creating the snapshot) 55_unsupported_imgopts 'compat=0.10' data_file 56 57run_qemu() 58{ 59 $QEMU -nographic -qmp stdio -serial none "$@" 2>&1 \ 60 | _filter_testdir | _filter_qmp | _filter_qemu \ 61 | sed 's/"sha256": ".\{64\}"/"sha256": HASH/' 62} 63 64for reason in snapshot bitmap; do 65 66# Four passes: 67# 0: Two-layer backing chain, commit to upper backing file (implicitly) 68# (in this case, the top image will be emptied) 69# 1: Two-layer backing chain, commit to upper backing file (explicitly) 70# (in this case, the top image will implicitly stay unchanged) 71# 2: Two-layer backing chain, commit to upper backing file (implicitly with -d) 72# (in this case, the top image will explicitly stay unchanged) 73# 3: Two-layer backing chain, commit to lower backing file 74# (in this case, the top image will implicitly stay unchanged) 75# 76# 020 already tests committing, so this only tests whether image chains are 77# working properly and that all images above the base are emptied; therefore, 78# no complicated patterns are necessary. Check near the 2G mark, as qcow2 79# has been buggy at that boundary in the past. 80for i in 0 1 2 3; do 81 82echo 83echo "=== Test pass $reason.$i ===" 84echo 85 86len=$((2100 * 1024 * 1024 + 512)) # larger than 2G, and not cluster aligned 87TEST_IMG="$TEST_IMG.base" _make_test_img $len 88TEST_IMG="$TEST_IMG.itmd" _make_test_img -b "$TEST_IMG.base" -F $IMGFMT $len 89_make_test_img -b "$TEST_IMG.itmd" -F $IMGFMT $len 90# Update the top image to use a feature that is incompatible with fast path 91case $reason in 92 snapshot) $QEMU_IMG snapshot -c snap "$TEST_IMG" ;; 93 bitmap) 94 run_qemu <<EOF 95{ "execute": "qmp_capabilities" } 96{ "execute": "blockdev-add", 97 "arguments": { "driver": "qcow2", "node-name": "drive0", 98 "file": { "driver": "file", "filename": "$TEST_IMG" } } } 99{ "execute": "block-dirty-bitmap-add", 100 "arguments": { "node": "drive0", "name": "bitmap0", 101 "persistent": true } } 102{ "execute": "quit" } 103EOF 104 ;; 105esac 106 107$QEMU_IO -c "write -P 1 0x7ffd0000 192k" "$TEST_IMG.base" | _filter_qemu_io 108$QEMU_IO -c "write -P 2 0x7ffe0000 128k" "$TEST_IMG.itmd" | _filter_qemu_io 109$QEMU_IO -c "write -P 3 0x7fff0000 64k" "$TEST_IMG" | _filter_qemu_io 110$QEMU_IO -c "write -P 4 $(($len - 512)) 512" "$TEST_IMG" | _filter_qemu_io 111 112if [ $i -lt 3 ]; then 113 if [ $i == 0 ]; then 114 # -b "$TEST_IMG.itmd" should be the default (that is, committing to the 115 # first backing file in the chain) 116 $QEMU_IMG commit "$TEST_IMG" 117 elif [ $i == 1 ]; then 118 # explicitly specify the commit target (this should imply -d) 119 $QEMU_IMG commit -b "$TEST_IMG.itmd" "$TEST_IMG" 120 else 121 # do not explicitly specify the commit target, but use -d to leave the 122 # top image unchanged 123 $QEMU_IMG commit -d "$TEST_IMG" 124 fi 125 126 # Bottom should be unchanged 127 $QEMU_IO -c 'read -P 1 0x7ffd0000 192k' "$TEST_IMG.base" | _filter_qemu_io 128 $QEMU_IO -c "read -P 0 $((len - 512)) 512" "$TEST_IMG.base" | _filter_qemu_io 129 130 # Intermediate should contain changes from top 131 $QEMU_IO -c 'read -P 1 0x7ffd0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io 132 $QEMU_IO -c 'read -P 2 0x7ffe0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io 133 $QEMU_IO -c 'read -P 3 0x7fff0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io 134 $QEMU_IO -c "read -P 4 $((len - 512)) 512" "$TEST_IMG.itmd" | _filter_qemu_io 135 136 # And in pass 0, the top image should be empty, whereas in both other passes 137 # it should be unchanged (which is both checked by qemu-img map) 138else 139 $QEMU_IMG commit -b "$TEST_IMG.base" "$TEST_IMG" 140 141 # Bottom should contain all changes 142 $QEMU_IO -c 'read -P 1 0x7ffd0000 64k' "$TEST_IMG.base" | _filter_qemu_io 143 $QEMU_IO -c 'read -P 2 0x7ffe0000 64k' "$TEST_IMG.base" | _filter_qemu_io 144 $QEMU_IO -c 'read -P 3 0x7fff0000 64k' "$TEST_IMG.base" | _filter_qemu_io 145 $QEMU_IO -c "read -P 4 $((len - 512)) 512" "$TEST_IMG.base" | _filter_qemu_io 146 147 # Both top and intermediate should be unchanged 148fi 149 150$QEMU_IMG map "$TEST_IMG.base" | _filter_qemu_img_map 151$QEMU_IMG map "$TEST_IMG.itmd" | _filter_qemu_img_map 152$QEMU_IMG map "$TEST_IMG" | _filter_qemu_img_map 153 154# Check that the reason for slow path is still present, as appropriate 155case $reason in 156 snapshot) 157 $QEMU_IMG snapshot -l "$TEST_IMG" | 158 sed 's/^\(.\{20\}\).*/\1/; s/ *$//' ;; 159 bitmap) 160 run_qemu <<EOF 161{ "execute": "qmp_capabilities" } 162{ "execute": "blockdev-add", 163 "arguments": { "driver": "qcow2", "node-name": "drive0", 164 "file": { "driver": "file", "filename": "$TEST_IMG" } } } 165{ "execute": "x-debug-block-dirty-bitmap-sha256", 166 "arguments": { "node": "drive0", "name": "bitmap0" } } 167{ "execute": "quit" } 168EOF 169 ;; 170esac 171 172done 173done 174 175# success, all done 176echo "*** done" 177rm -f $seq.full 178status=0 179