1#!/usr/bin/env 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 $seq" 27 28status=1 # failure is the default! 29 30_cleanup() 31{ 32 _cleanup_test_img 33 _rm_test_img "$TEST_IMG.itmd" 34} 35trap "_cleanup; exit \$status" 0 1 2 3 15 36 37# get standard environment, filters and checks 38. ./common.rc 39. ./common.filter 40. ./common.pattern 41 42# Any format supporting backing files and bdrv_make_empty 43_supported_fmt qcow qcow2 44_supported_proto file 45_supported_os Linux 46 47 48# Four main passes: 49# 0: Two-layer backing chain, commit to upper backing file (implicitly) 50# (in this case, the top image will be emptied) 51# 1: Two-layer backing chain, commit to upper backing file (explicitly) 52# (in this case, the top image will implicitly stay unchanged) 53# 2: Two-layer backing chain, commit to upper backing file (implicitly with -d) 54# (in this case, the top image will explicitly stay unchanged) 55# 3: Two-layer backing chain, commit to lower backing file 56# (in this case, the top image will implicitly stay unchanged) 57# 58# 020 already tests committing, so this only tests whether image chains are 59# working properly and that all images above the base are emptied; therefore, 60# no complicated patterns are necessary. Check near the 2G mark, as qcow2 61# has been buggy at that boundary in the past. 62for i in 0 1 2 3; do 63 64echo 65echo "=== Test pass $i ===" 66echo 67 68len=$((2100 * 1024 * 1024 + 512)) # larger than 2G, and not cluster aligned 69TEST_IMG="$TEST_IMG.base" _make_test_img $len 70TEST_IMG="$TEST_IMG.itmd" _make_test_img -b "$TEST_IMG.base" $len 71_make_test_img -b "$TEST_IMG.itmd" $len 72 73$QEMU_IO -c "write -P 1 0x7ffd0000 192k" "$TEST_IMG.base" | _filter_qemu_io 74$QEMU_IO -c "write -P 2 0x7ffe0000 128k" "$TEST_IMG.itmd" | _filter_qemu_io 75$QEMU_IO -c "write -P 3 0x7fff0000 64k" "$TEST_IMG" | _filter_qemu_io 76$QEMU_IO -c "write -P 4 $(($len - 512)) 512" "$TEST_IMG" | _filter_qemu_io 77 78if [ $i -lt 3 ]; then 79 if [ $i == 0 ]; then 80 # -b "$TEST_IMG.itmd" should be the default (that is, committing to the 81 # first backing file in the chain) 82 $QEMU_IMG commit "$TEST_IMG" 83 elif [ $i == 1 ]; then 84 # explicitly specify the commit target (this should imply -d) 85 $QEMU_IMG commit -b "$TEST_IMG.itmd" "$TEST_IMG" 86 else 87 # do not explicitly specify the commit target, but use -d to leave the 88 # top image unchanged 89 $QEMU_IMG commit -d "$TEST_IMG" 90 fi 91 92 # Bottom should be unchanged 93 $QEMU_IO -c 'read -P 1 0x7ffd0000 192k' "$TEST_IMG.base" | _filter_qemu_io 94 $QEMU_IO -c "read -P 0 $((len - 512)) 512" "$TEST_IMG.base" | _filter_qemu_io 95 96 # Intermediate should contain changes from top 97 $QEMU_IO -c 'read -P 1 0x7ffd0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io 98 $QEMU_IO -c 'read -P 2 0x7ffe0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io 99 $QEMU_IO -c 'read -P 3 0x7fff0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io 100 $QEMU_IO -c "read -P 4 $((len - 512)) 512" "$TEST_IMG.itmd" | _filter_qemu_io 101 102 # And in pass 0, the top image should be empty, whereas in both other passes 103 # it should be unchanged (which is both checked by qemu-img map) 104else 105 $QEMU_IMG commit -b "$TEST_IMG.base" "$TEST_IMG" 106 107 # Bottom should contain all changes 108 $QEMU_IO -c 'read -P 1 0x7ffd0000 64k' "$TEST_IMG.base" | _filter_qemu_io 109 $QEMU_IO -c 'read -P 2 0x7ffe0000 64k' "$TEST_IMG.base" | _filter_qemu_io 110 $QEMU_IO -c 'read -P 3 0x7fff0000 64k' "$TEST_IMG.base" | _filter_qemu_io 111 $QEMU_IO -c "read -P 4 $((len - 512)) 512" "$TEST_IMG.base" | _filter_qemu_io 112 113 # Both top and intermediate should be unchanged 114fi 115 116$QEMU_IMG map "$TEST_IMG.base" | _filter_qemu_img_map 117$QEMU_IMG map "$TEST_IMG.itmd" | _filter_qemu_img_map 118$QEMU_IMG map "$TEST_IMG" | _filter_qemu_img_map 119 120done 121 122 123# success, all done 124echo "*** done" 125rm -f $seq.full 126status=0 127