1#!/bin/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 $seq" 26 27here=`pwd` 28status=1 # failure is the default! 29 30_cleanup() 31{ 32 _cleanup_test_img 33 rm -f "$TEST_IMG.base" 34 rm -f "$TEST_IMG.orig" 35} 36trap "_cleanup; exit \$status" 0 1 2 3 15 37 38# get standard environment, filters and checks 39. ./common.rc 40. ./common.filter 41. ./common.pattern 42 43# Any format supporting backing files 44_supported_fmt qcow qcow2 vmdk qed 45_supported_proto file 46_supported_os Linux 47_unsupported_imgopts "subformat=monolithicFlat" \ 48 "subformat=twoGbMaxExtentFlat" \ 49 "subformat=twoGbMaxExtentSparse" 50 51TEST_OFFSETS="0 4294967296" 52 53TEST_IMG_SAVE="$TEST_IMG" 54TEST_IMG="$TEST_IMG.base" 55 56_make_test_img 6G 57 58echo "Filling base image" 59echo 60 61for offset in $TEST_OFFSETS; do 62 # Some clusters with alternating backing file/image file reads 63 io writev $(( offset )) 512 1024 64 64 65 # Complete backing clusters 66 io writev $(( offset + 64 * 1024)) 65536 65536 1 67done 68_check_test_img 69 70echo "Creating test image with backing file" 71echo 72 73TEST_IMG="$TEST_IMG_SAVE" 74_make_test_img -b "$TEST_IMG.base" 6G 75 76echo "Filling test image" 77echo 78 79for offset in $TEST_OFFSETS; do 80 # Some clusters with alternating backing file/image file reads 81 io writev $(( offset + 512 )) 512 1024 64 82 83 # Complete test image clusters 84 io writev $(( offset + 64 * 1024 + 65536)) 65536 65536 1 85done 86_check_test_img 87 88$QEMU_IMG commit "$TEST_IMG" 89TEST_IMG="$TEST_IMG.base" 90 91echo "Reading from the backing file" 92echo 93 94for offset in $TEST_OFFSETS; do 95 # Some clusters with alternating backing file/image file reads 96 io readv $(( offset )) 512 1024 64 97 io readv $(( offset + 512 )) 512 1024 64 98 99 # Complete test image clusters 100 io readv $(( offset + 64 * 1024)) 65536 65536 1 101 io readv $(( offset + 64 * 1024 + 65536)) 65536 65536 1 102 103 # Empty sectors 104 io_zero readv $(( offset + 64 * 1024 + 65536 * 4 )) 65536 65536 1 105done 106_check_test_img 107_cleanup 108TEST_IMG=$TEST_IMG_SAVE 109 110echo 111echo 'Testing failing commit' 112echo 113 114TEST_IMG="$TEST_IMG.base" _make_test_img 1M 115 116# Create an image with a null backing file to which committing will fail (with 117# ENOSPC so we can distinguish the result from some generic EIO which may be 118# generated anywhere in the block layer) 119_make_test_img -b "json:{'driver': '$IMGFMT', 120 'file': { 121 'driver': 'blkdebug', 122 'inject-error': [{ 123 'event': 'write_aio', 124 'errno': 28, 125 'once': true 126 }], 127 'image': { 128 'driver': 'file', 129 'filename': '$TEST_IMG.base' 130 }}}" 131 132# Just write anything so committing will not be a no-op 133$QEMU_IO -c 'writev 0 64k' "$TEST_IMG" | _filter_qemu_io 134 135$QEMU_IMG commit "$TEST_IMG" 136_cleanup 137 138# success, all done 139echo "*** done" 140rm -f $seq.full 141status=0 142