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# Copyright (C) 2014 Red Hat, Inc. 7# 8# This program is free software; you can redistribute it and/or modify 9# it under the terms of the GNU General Public License as published by 10# the Free Software Foundation; either version 2 of the License, or 11# (at your option) any later version. 12# 13# This program is distributed in the hope that it will be useful, 14# but WITHOUT ANY WARRANTY; without even the implied warranty of 15# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16# GNU General Public License for more details. 17# 18# You should have received a copy of the GNU General Public License 19# along with this program. If not, see <http://www.gnu.org/licenses/>. 20# 21 22# creator 23owner=mreitz@redhat.com 24 25seq="$(basename $0)" 26echo "QA output created by $seq" 27 28here="$PWD" 29status=1 # failure is the default! 30 31_cleanup() 32{ 33 _cleanup_test_img 34 _rm_test_img "$TEST_IMG.itmd" 35} 36trap "_cleanup; exit \$status" 0 1 2 3 15 37 38# get standard environment, filters and checks 39. ./common.rc 40. ./common.filter 41. ./common.pattern 42 43# Any format supporting backing files and bdrv_make_empty 44_supported_fmt qcow qcow2 45_supported_proto file 46_supported_os Linux 47 48 49# Four main passes: 50# 0: Two-layer backing chain, commit to upper backing file (implicitly) 51# (in this case, the top image will be emptied) 52# 1: Two-layer backing chain, commit to upper backing file (explicitly) 53# (in this case, the top image will implicitly stay unchanged) 54# 2: Two-layer backing chain, commit to upper backing file (implicitly with -d) 55# (in this case, the top image will explicitly stay unchanged) 56# 3: Two-layer backing chain, commit to lower backing file 57# (in this case, the top image will implicitly stay unchanged) 58# 59# Each pass is run twice, since qcow2 has different code paths for cleaning 60# an image depending on whether it has a snapshot. 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 67for j in 0 1; do 68 69echo 70echo "=== Test pass $i.$j ===" 71echo 72 73TEST_IMG="$TEST_IMG.base" _make_test_img 2100M 74TEST_IMG="$TEST_IMG.itmd" _make_test_img -b "$TEST_IMG.base" 2100M 75_make_test_img -b "$TEST_IMG.itmd" 2100M 76if [ $j -eq 0 ]; then 77 $QEMU_IMG snapshot -c snap "$TEST_IMG" 78fi 79 80$QEMU_IO -c 'write -P 1 0x7ffd0000 192k' "$TEST_IMG.base" | _filter_qemu_io 81$QEMU_IO -c 'write -P 2 0x7ffe0000 128k' "$TEST_IMG.itmd" | _filter_qemu_io 82$QEMU_IO -c 'write -P 3 0x7fff0000 64k' "$TEST_IMG" | _filter_qemu_io 83 84if [ $i -lt 3 ]; then 85 if [ $i == 0 ]; then 86 # -b "$TEST_IMG.itmd" should be the default (that is, committing to the 87 # first backing file in the chain) 88 $QEMU_IMG commit "$TEST_IMG" 89 elif [ $i == 1 ]; then 90 # explicitly specify the commit target (this should imply -d) 91 $QEMU_IMG commit -b "$TEST_IMG.itmd" "$TEST_IMG" 92 else 93 # do not explicitly specify the commit target, but use -d to leave the 94 # top image unchanged 95 $QEMU_IMG commit -d "$TEST_IMG" 96 fi 97 98 # Bottom should be unchanged 99 $QEMU_IO -c 'read -P 1 0x7ffd0000 192k' "$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 105 106 # And in pass 0, the top image should be empty, whereas in both other passes 107 # it should be unchanged (which is both checked by qemu-img map) 108else 109 $QEMU_IMG commit -b "$TEST_IMG.base" "$TEST_IMG" 110 111 # Bottom should contain all changes 112 $QEMU_IO -c 'read -P 1 0x7ffd0000 64k' "$TEST_IMG.base" | _filter_qemu_io 113 $QEMU_IO -c 'read -P 2 0x7ffe0000 64k' "$TEST_IMG.base" | _filter_qemu_io 114 $QEMU_IO -c 'read -P 3 0x7fff0000 64k' "$TEST_IMG.base" | _filter_qemu_io 115 116 # Both top and intermediate should be unchanged 117fi 118 119$QEMU_IMG map "$TEST_IMG.base" | _filter_qemu_img_map 120$QEMU_IMG map "$TEST_IMG.itmd" | _filter_qemu_img_map 121$QEMU_IMG map "$TEST_IMG" | _filter_qemu_img_map 122 123done 124done 125 126 127# success, all done 128echo "*** done" 129rm -f $seq.full 130status=0 131