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 to test different codepath 7# in qcow2 8# 9# Copyright (C) 2014 Red Hat, Inc. 10# 11# This program is free software; you can redistribute it and/or modify 12# it under the terms of the GNU General Public License as published by 13# the Free Software Foundation; either version 2 of the License, or 14# (at your option) any later version. 15# 16# This program is distributed in the hope that it will be useful, 17# but WITHOUT ANY WARRANTY; without even the implied warranty of 18# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19# GNU General Public License for more details. 20# 21# You should have received a copy of the GNU General Public License 22# along with this program. If not, see <http://www.gnu.org/licenses/>. 23# 24 25# creator 26owner=mreitz@redhat.com 27 28seq="$(basename $0)" 29echo "QA output created by $seq" 30 31here="$PWD" 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# Any format supporting backing files and bdrv_make_empty 47_supported_fmt qcow2 48_supported_proto file 49_supported_os Linux 50 51 52# Four passes: 53# 0: Two-layer backing chain, commit to upper backing file (implicitly) 54# (in this case, the top image will be emptied) 55# 1: Two-layer backing chain, commit to upper backing file (explicitly) 56# (in this case, the top image will implicitly stay unchanged) 57# 2: Two-layer backing chain, commit to upper backing file (implicitly with -d) 58# (in this case, the top image will explicitly stay unchanged) 59# 3: Two-layer backing chain, commit to lower backing file 60# (in this case, the top image will implicitly stay unchanged) 61# 62# 020 already tests committing, so this only tests whether image chains are 63# working properly and that all images above the base are emptied; therefore, 64# no complicated patterns are necessary. Check near the 2G mark, as qcow2 65# has been buggy at that boundary in the past. 66for i in 0 1 2 3; do 67 68echo 69echo "=== Test pass $i ===" 70echo 71 72len=$((2100 * 1024 * 1024 + 512)) # larger than 2G, and not cluster aligned 73TEST_IMG="$TEST_IMG.base" _make_test_img $len 74TEST_IMG="$TEST_IMG.itmd" _make_test_img -b "$TEST_IMG.base" $len 75_make_test_img -b "$TEST_IMG.itmd" $len 76$QEMU_IMG snapshot -c snap "$TEST_IMG" 77 78$QEMU_IO -c "write -P 1 0x7ffd0000 192k" "$TEST_IMG.base" | _filter_qemu_io 79$QEMU_IO -c "write -P 2 0x7ffe0000 128k" "$TEST_IMG.itmd" | _filter_qemu_io 80$QEMU_IO -c "write -P 3 0x7fff0000 64k" "$TEST_IMG" | _filter_qemu_io 81$QEMU_IO -c "write -P 4 $(($len - 512)) 512" "$TEST_IMG" | _filter_qemu_io 82 83if [ $i -lt 3 ]; then 84 if [ $i == 0 ]; then 85 # -b "$TEST_IMG.itmd" should be the default (that is, committing to the 86 # first backing file in the chain) 87 $QEMU_IMG commit "$TEST_IMG" 88 elif [ $i == 1 ]; then 89 # explicitly specify the commit target (this should imply -d) 90 $QEMU_IMG commit -b "$TEST_IMG.itmd" "$TEST_IMG" 91 else 92 # do not explicitly specify the commit target, but use -d to leave the 93 # top image unchanged 94 $QEMU_IMG commit -d "$TEST_IMG" 95 fi 96 97 # Bottom should be unchanged 98 $QEMU_IO -c 'read -P 1 0x7ffd0000 192k' "$TEST_IMG.base" | _filter_qemu_io 99 $QEMU_IO -c "read -P 0 $((len - 512)) 512" "$TEST_IMG.base" | _filter_qemu_io 100 101 # Intermediate should contain changes from top 102 $QEMU_IO -c 'read -P 1 0x7ffd0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io 103 $QEMU_IO -c 'read -P 2 0x7ffe0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io 104 $QEMU_IO -c 'read -P 3 0x7fff0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io 105 $QEMU_IO -c "read -P 4 $((len - 512)) 512" "$TEST_IMG.itmd" | _filter_qemu_io 106 107 # And in pass 0, the top image should be empty, whereas in both other passes 108 # it should be unchanged (which is both checked by qemu-img map) 109else 110 $QEMU_IMG commit -b "$TEST_IMG.base" "$TEST_IMG" 111 112 # Bottom should contain all changes 113 $QEMU_IO -c 'read -P 1 0x7ffd0000 64k' "$TEST_IMG.base" | _filter_qemu_io 114 $QEMU_IO -c 'read -P 2 0x7ffe0000 64k' "$TEST_IMG.base" | _filter_qemu_io 115 $QEMU_IO -c 'read -P 3 0x7fff0000 64k' "$TEST_IMG.base" | _filter_qemu_io 116 $QEMU_IO -c "read -P 4 $((len - 512)) 512" "$TEST_IMG.base" | _filter_qemu_io 117 118 # Both top and intermediate should be unchanged 119fi 120 121$QEMU_IMG map "$TEST_IMG.base" | _filter_qemu_img_map 122$QEMU_IMG map "$TEST_IMG.itmd" | _filter_qemu_img_map 123$QEMU_IMG map "$TEST_IMG" | _filter_qemu_img_map 124 125done 126 127 128# success, all done 129echo "*** done" 130rm -f $seq.full 131status=0 132