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 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# 020 already tests committing, so this only tests whether image chains are 60# working properly and that all images above the base are emptied; therefore, 61# no complicated patterns are necessary 62for i in 0 1 2 3; do 63 64echo 65echo "=== Test pass $i ===" 66echo 67 68TEST_IMG="$TEST_IMG.base" _make_test_img 64M 69TEST_IMG="$TEST_IMG.itmd" _make_test_img -b "$TEST_IMG.base" 64M 70_make_test_img -b "$TEST_IMG.itmd" 64M 71 72$QEMU_IO -c 'write -P 1 0 192k' "$TEST_IMG.base" | _filter_qemu_io 73$QEMU_IO -c 'write -P 2 64k 128k' "$TEST_IMG.itmd" | _filter_qemu_io 74$QEMU_IO -c 'write -P 3 128k 64k' "$TEST_IMG" | _filter_qemu_io 75 76if [ $i -lt 3 ]; then 77 if [ $i == 0 ]; then 78 # -b "$TEST_IMG.itmd" should be the default (that is, committing to the 79 # first backing file in the chain) 80 $QEMU_IMG commit "$TEST_IMG" 81 elif [ $i == 1 ]; then 82 # explicitly specify the commit target (this should imply -d) 83 $QEMU_IMG commit -b "$TEST_IMG.itmd" "$TEST_IMG" 84 else 85 # do not explicitly specify the commit target, but use -d to leave the 86 # top image unchanged 87 $QEMU_IMG commit -d "$TEST_IMG" 88 fi 89 90 # Bottom should be unchanged 91 $QEMU_IO -c 'read -P 1 0 192k' "$TEST_IMG.base" | _filter_qemu_io 92 93 # Intermediate should contain changes from top 94 $QEMU_IO -c 'read -P 1 0 64k' "$TEST_IMG.itmd" | _filter_qemu_io 95 $QEMU_IO -c 'read -P 2 64k 64k' "$TEST_IMG.itmd" | _filter_qemu_io 96 $QEMU_IO -c 'read -P 3 128k 64k' "$TEST_IMG.itmd" | _filter_qemu_io 97 98 # And in pass 0, the top image should be empty, whereas in both other passes 99 # it should be unchanged (which is both checked by qemu-img map) 100else 101 $QEMU_IMG commit -b "$TEST_IMG.base" "$TEST_IMG" 102 103 # Bottom should contain all changes 104 $QEMU_IO -c 'read -P 1 0 64k' "$TEST_IMG.base" | _filter_qemu_io 105 $QEMU_IO -c 'read -P 2 64k 64k' "$TEST_IMG.base" | _filter_qemu_io 106 $QEMU_IO -c 'read -P 3 128k 64k' "$TEST_IMG.base" | _filter_qemu_io 107 108 # Both top and intermediate should be unchanged 109fi 110 111$QEMU_IMG map "$TEST_IMG.base" | _filter_qemu_img_map 112$QEMU_IMG map "$TEST_IMG.itmd" | _filter_qemu_img_map 113$QEMU_IMG map "$TEST_IMG" | _filter_qemu_img_map 114 115done 116 117 118# success, all done 119echo "*** done" 120rm -f $seq.full 121status=0 122