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 $seq" 26 27status=1 # failure is the default! 28 29_cleanup() 30{ 31 _cleanup_test_img 32 _rm_test_img "$TEST_IMG.base" 33 _rm_test_img "$TEST_IMG.orig" 34} 35trap "_cleanup; exit \$status" 0 1 2 3 15 36 37# get standard environment, filters and checks 38. ./common.rc 39. ./common.filter 40. ./common.pattern 41 42# Any format supporting backing files 43_supported_fmt qcow qcow2 vmdk qed 44_supported_proto file 45_unsupported_imgopts "subformat=monolithicFlat" \ 46 "subformat=twoGbMaxExtentFlat" \ 47 "subformat=twoGbMaxExtentSparse" \ 48 "subformat=streamOptimized" 49 50TEST_OFFSETS="0 4294967296" 51 52TEST_IMG_SAVE="$TEST_IMG" 53TEST_IMG="$TEST_IMG.base" 54 55_make_test_img 6G 56 57echo "Filling base image" 58echo 59 60for offset in $TEST_OFFSETS; do 61 # Some clusters with alternating backing file/image file reads 62 io writev $(( offset )) 512 1024 64 63 64 # Complete backing clusters 65 io writev $(( offset + 64 * 1024)) 65536 65536 1 66done 67_check_test_img 68 69echo "Creating test image with backing file" 70echo 71 72TEST_IMG="$TEST_IMG_SAVE" 73_make_test_img -b "$TEST_IMG.base" -F $IMGFMT 6G 74 75echo "Filling test image" 76echo 77 78for offset in $TEST_OFFSETS; do 79 # Some clusters with alternating backing file/image file reads 80 io writev $(( offset + 512 )) 512 1024 64 81 82 # Complete test image clusters 83 io writev $(( offset + 64 * 1024 + 65536)) 65536 65536 1 84done 85_check_test_img 86 87$QEMU_IMG commit "$TEST_IMG" 88TEST_IMG="$TEST_IMG.base" 89 90echo "Reading from the backing file" 91echo 92 93for offset in $TEST_OFFSETS; do 94 # Some clusters with alternating backing file/image file reads 95 io readv $(( offset )) 512 1024 64 96 io readv $(( offset + 512 )) 512 1024 64 97 98 # Complete test image clusters 99 io readv $(( offset + 64 * 1024)) 65536 65536 1 100 io readv $(( offset + 64 * 1024 + 65536)) 65536 65536 1 101 102 # Empty sectors 103 io_zero readv $(( offset + 64 * 1024 + 65536 * 4 )) 65536 65536 1 104done 105_check_test_img 106_cleanup 107TEST_IMG=$TEST_IMG_SAVE 108 109echo 110echo 'Testing failing commit' 111echo 112 113TEST_IMG="$TEST_IMG.base" _make_test_img 1M 114 115# Create an image with a null backing file to which committing will fail (with 116# ENOSPC so we can distinguish the result from some generic EIO which may be 117# generated anywhere in the block layer) 118backing="json:{'driver': '$IMGFMT', 119 'file': { 120 'driver': 'blkdebug', 121 'inject-error': [{ 122 'event': 'write_aio', 123 'errno': 28, 124 'once': true 125 }], 126 'image': { 127 'driver': 'file', 128 'filename': '$TEST_IMG.base' 129 }}}" 130 131# Filter out newlines and collapse spaces 132backing=$(echo "$backing" | tr -d '\n' | tr -s ' ') 133 134_make_test_img -b "$backing" -F $IMGFMT 135 136# Just write anything so committing will not be a no-op 137$QEMU_IO -c 'writev 0 64k' "$TEST_IMG" | _filter_qemu_io 138 139$QEMU_IMG commit "$TEST_IMG" 140_cleanup 141 142# success, all done 143echo "*** done" 144rm -f $seq.full 145status=0 146