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