1#!/usr/bin/env bash 2# group: rw auto backing 3# 4# Commit changes into backing chains and empty the top image if the 5# backing image is not explicitly specified 6# 7# Copyright (C) 2014 Red Hat, Inc. 8# 9# This program is free software; you can redistribute it and/or modify 10# it under the terms of the GNU General Public License as published by 11# the Free Software Foundation; either version 2 of the License, or 12# (at your option) any later version. 13# 14# This program is distributed in the hope that it will be useful, 15# but WITHOUT ANY WARRANTY; without even the implied warranty of 16# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17# GNU General Public License for more details. 18# 19# You should have received a copy of the GNU General Public License 20# along with this program. If not, see <http://www.gnu.org/licenses/>. 21# 22 23# creator 24owner=hreitz@redhat.com 25 26seq="$(basename $0)" 27echo "QA output created by $seq" 28 29status=1 # failure is the default! 30 31_cleanup() 32{ 33 _cleanup_test_img 34 _rm_test_img "$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 fuse 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# 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. Check near the 2G mark, as qcow2 62# has been buggy at that boundary in the past. 63for i in 0 1 2 3; do 64 65echo 66echo "=== Test pass $i ===" 67echo 68 69len=$((2100 * 1024 * 1024 + 512)) # larger than 2G, and not cluster aligned 70TEST_IMG="$TEST_IMG.base" _make_test_img $len 71TEST_IMG="$TEST_IMG.itmd" _make_test_img -b "$TEST_IMG.base" -F $IMGFMT $len 72_make_test_img -b "$TEST_IMG.itmd" -F $IMGFMT $len 73 74$QEMU_IO -c "write -P 1 0x7ffd0000 192k" "$TEST_IMG.base" | _filter_qemu_io 75$QEMU_IO -c "write -P 2 0x7ffe0000 128k" "$TEST_IMG.itmd" | _filter_qemu_io 76$QEMU_IO -c "write -P 3 0x7fff0000 64k" "$TEST_IMG" | _filter_qemu_io 77$QEMU_IO -c "write -P 4 $(($len - 512)) 512" "$TEST_IMG" | _filter_qemu_io 78 79if [ $i -lt 3 ]; then 80 if [ $i == 0 ]; then 81 # -b "$TEST_IMG.itmd" should be the default (that is, committing to the 82 # first backing file in the chain) 83 $QEMU_IMG commit "$TEST_IMG" 84 elif [ $i == 1 ]; then 85 # explicitly specify the commit target (this should imply -d) 86 $QEMU_IMG commit -b "$TEST_IMG.itmd" "$TEST_IMG" 87 else 88 # do not explicitly specify the commit target, but use -d to leave the 89 # top image unchanged 90 $QEMU_IMG commit -d "$TEST_IMG" 91 fi 92 93 # Bottom should be unchanged 94 $QEMU_IO -c 'read -P 1 0x7ffd0000 192k' "$TEST_IMG.base" | _filter_qemu_io 95 $QEMU_IO -c "read -P 0 $((len - 512)) 512" "$TEST_IMG.base" | _filter_qemu_io 96 97 # Intermediate should contain changes from top 98 $QEMU_IO -c 'read -P 1 0x7ffd0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io 99 $QEMU_IO -c 'read -P 2 0x7ffe0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io 100 $QEMU_IO -c 'read -P 3 0x7fff0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io 101 $QEMU_IO -c "read -P 4 $((len - 512)) 512" "$TEST_IMG.itmd" | _filter_qemu_io 102 103 # And in pass 0, the top image should be empty, whereas in both other passes 104 # it should be unchanged (which is both checked by qemu-img map) 105else 106 $QEMU_IMG commit -b "$TEST_IMG.base" "$TEST_IMG" 107 108 # Bottom should contain all changes 109 $QEMU_IO -c 'read -P 1 0x7ffd0000 64k' "$TEST_IMG.base" | _filter_qemu_io 110 $QEMU_IO -c 'read -P 2 0x7ffe0000 64k' "$TEST_IMG.base" | _filter_qemu_io 111 $QEMU_IO -c 'read -P 3 0x7fff0000 64k' "$TEST_IMG.base" | _filter_qemu_io 112 $QEMU_IO -c "read -P 4 $((len - 512)) 512" "$TEST_IMG.base" | _filter_qemu_io 113 114 # Both top and intermediate should be unchanged 115fi 116 117$QEMU_IMG map "$TEST_IMG.base" | _filter_qemu_img_map 118$QEMU_IMG map "$TEST_IMG.itmd" | _filter_qemu_img_map 119$QEMU_IMG map "$TEST_IMG" | _filter_qemu_img_map 120 121done 122 123 124# success, all done 125echo "*** done" 126rm -f $seq.full 127status=0 128