1#!/usr/bin/env bash 2# 3# Commit changes to backing file 4# 5# Copyright (C) 2009 Red Hat, Inc. 6# 7# This program is free software; you can redistribute it and/or modify 8# it under the terms of the GNU General Public License as published by 9# the Free Software Foundation; either version 2 of the License, or 10# (at your option) any later version. 11# 12# This program is distributed in the hope that it will be useful, 13# but WITHOUT ANY WARRANTY; without even the implied warranty of 14# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15# GNU General Public License for more details. 16# 17# You should have received a copy of the GNU General Public License 18# along with this program. If not, see <http://www.gnu.org/licenses/>. 19# 20 21# creator 22owner=kwolf@redhat.com 23 24seq=`basename $0` 25echo "QA output created by $seq" 26 27status=1 # failure is the default! 28 29_cleanup() 30{ 31 _cleanup_test_img 32 rm -f "$TEST_IMG.base" 33 rm -f "$TEST_IMG.orig" 34} 35trap "_cleanup; exit \$status" 0 1 2 3 15 36 37# get standard environment, filters and checks 38. ./common.rc 39. ./common.filter 40. ./common.pattern 41 42# Any format supporting backing files 43_supported_fmt qcow qcow2 vmdk qed 44_supported_proto file 45_unsupported_imgopts "subformat=monolithicFlat" \ 46 "subformat=twoGbMaxExtentFlat" \ 47 "subformat=twoGbMaxExtentSparse" 48 49TEST_OFFSETS="0 4294967296" 50 51TEST_IMG_SAVE="$TEST_IMG" 52TEST_IMG="$TEST_IMG.base" 53 54_make_test_img 6G 55 56echo "Filling base image" 57echo 58 59for offset in $TEST_OFFSETS; do 60 # Some clusters with alternating backing file/image file reads 61 io writev $(( offset )) 512 1024 64 62 63 # Complete backing clusters 64 io writev $(( offset + 64 * 1024)) 65536 65536 1 65done 66_check_test_img 67 68echo "Creating test image with backing file" 69echo 70 71TEST_IMG="$TEST_IMG_SAVE" 72_make_test_img -b "$TEST_IMG.base" 6G 73 74echo "Filling test image" 75echo 76 77for offset in $TEST_OFFSETS; do 78 # Some clusters with alternating backing file/image file reads 79 io writev $(( offset + 512 )) 512 1024 64 80 81 # Complete test image clusters 82 io writev $(( offset + 64 * 1024 + 65536)) 65536 65536 1 83done 84_check_test_img 85 86$QEMU_IMG commit "$TEST_IMG" 87TEST_IMG="$TEST_IMG.base" 88 89echo "Reading from the backing file" 90echo 91 92for offset in $TEST_OFFSETS; do 93 # Some clusters with alternating backing file/image file reads 94 io readv $(( offset )) 512 1024 64 95 io readv $(( offset + 512 )) 512 1024 64 96 97 # Complete test image clusters 98 io readv $(( offset + 64 * 1024)) 65536 65536 1 99 io readv $(( offset + 64 * 1024 + 65536)) 65536 65536 1 100 101 # Empty sectors 102 io_zero readv $(( offset + 64 * 1024 + 65536 * 4 )) 65536 65536 1 103done 104_check_test_img 105_cleanup 106TEST_IMG=$TEST_IMG_SAVE 107 108echo 109echo 'Testing failing commit' 110echo 111 112TEST_IMG="$TEST_IMG.base" _make_test_img 1M 113 114# Create an image with a null backing file to which committing will fail (with 115# ENOSPC so we can distinguish the result from some generic EIO which may be 116# generated anywhere in the block layer) 117_make_test_img -b "json:{'driver': '$IMGFMT', 118 'file': { 119 'driver': 'blkdebug', 120 'inject-error': [{ 121 'event': 'write_aio', 122 'errno': 28, 123 'once': true 124 }], 125 'image': { 126 'driver': 'file', 127 'filename': '$TEST_IMG.base' 128 }}}" 129 130# Just write anything so committing will not be a no-op 131$QEMU_IO -c 'writev 0 64k' "$TEST_IMG" | _filter_qemu_io 132 133$QEMU_IMG commit "$TEST_IMG" 134_cleanup 135 136# success, all done 137echo "*** done" 138rm -f $seq.full 139status=0 140