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 "$TEST_IMG.orig" 34 35 _rm_test_img "$TEST_DIR/subdir/t.$IMGFMT.base" 36 _rm_test_img "$TEST_DIR/subdir/t.$IMGFMT.mid" 37 _rm_test_img "$TEST_DIR/subdir/t.$IMGFMT" 38 rmdir "$TEST_DIR/subdir" &> /dev/null 39} 40trap "_cleanup; exit \$status" 0 1 2 3 15 41 42# get standard environment, filters and checks 43. ./common.rc 44. ./common.filter 45. ./common.pattern 46 47# Any format supporting backing files 48_supported_fmt qcow qcow2 vmdk qed 49_supported_proto file 50_unsupported_imgopts "subformat=monolithicFlat" \ 51 "subformat=twoGbMaxExtentFlat" \ 52 "subformat=twoGbMaxExtentSparse" \ 53 "subformat=streamOptimized" 54 55TEST_OFFSETS="0 4294967296" 56 57TEST_IMG_SAVE="$TEST_IMG" 58TEST_IMG="$TEST_IMG.base" 59 60_make_test_img 6G 61 62echo "Filling base image" 63echo 64 65for offset in $TEST_OFFSETS; do 66 # Some clusters with alternating backing file/image file reads 67 io writev $(( offset )) 512 1024 64 68 69 # Complete backing clusters 70 io writev $(( offset + 64 * 1024)) 65536 65536 1 71done 72_check_test_img 73 74echo "Creating test image with backing file" 75echo 76 77TEST_IMG="$TEST_IMG_SAVE" 78_make_test_img -b "$TEST_IMG.base" -F $IMGFMT 6G 79 80echo "Filling test image" 81echo 82 83for offset in $TEST_OFFSETS; do 84 # Some clusters with alternating backing file/image file reads 85 io writev $(( offset + 512 )) 512 1024 64 86 87 # Complete test image clusters 88 io writev $(( offset + 64 * 1024 + 65536)) 65536 65536 1 89done 90_check_test_img 91 92$QEMU_IMG commit "$TEST_IMG" 93TEST_IMG="$TEST_IMG.base" 94 95echo "Reading from the backing file" 96echo 97 98for offset in $TEST_OFFSETS; do 99 # Some clusters with alternating backing file/image file reads 100 io readv $(( offset )) 512 1024 64 101 io readv $(( offset + 512 )) 512 1024 64 102 103 # Complete test image clusters 104 io readv $(( offset + 64 * 1024)) 65536 65536 1 105 io readv $(( offset + 64 * 1024 + 65536)) 65536 65536 1 106 107 # Empty sectors 108 io_zero readv $(( offset + 64 * 1024 + 65536 * 4 )) 65536 65536 1 109done 110_check_test_img 111_cleanup 112TEST_IMG=$TEST_IMG_SAVE 113 114echo 115echo 'Testing failing commit' 116echo 117 118TEST_IMG="$TEST_IMG.base" _make_test_img 1M 119 120# Create an image with a null backing file to which committing will fail (with 121# ENOSPC so we can distinguish the result from some generic EIO which may be 122# generated anywhere in the block layer) 123backing="json:{'driver': '$IMGFMT', 124 'file': { 125 'driver': 'blkdebug', 126 'inject-error': [{ 127 'event': 'write_aio', 128 'errno': 28, 129 'once': true 130 }], 131 'image': { 132 'driver': 'file', 133 'filename': '$TEST_IMG.base' 134 }}}" 135 136# Filter out newlines and collapse spaces 137backing=$(echo "$backing" | tr -d '\n' | tr -s ' ') 138 139_make_test_img -b "$backing" -F $IMGFMT 140 141# Just write anything so committing will not be a no-op 142$QEMU_IO -c 'writev 0 64k' "$TEST_IMG" | _filter_qemu_io 143 144$QEMU_IMG commit "$TEST_IMG" 145_cleanup 146 147 148echo 149echo 'Testing commit in sub-directory with relative filenames' 150echo 151 152pushd "$TEST_DIR" > /dev/null 153 154mkdir subdir 155 156TEST_IMG="subdir/t.$IMGFMT.base" _make_test_img 1M 157TEST_IMG="subdir/t.$IMGFMT.mid" _make_test_img -b "t.$IMGFMT.base" -F $IMGFMT 158TEST_IMG="subdir/t.$IMGFMT" _make_test_img -b "t.$IMGFMT.mid" -F $IMGFMT 159 160# Should work 161$QEMU_IMG commit -b "t.$IMGFMT.mid" "subdir/t.$IMGFMT" 162 163# Might theoretically work, but does not in practice (we have to 164# decide between this and the above; and since we always represent 165# backing file names as relative to the overlay, we go for the above) 166$QEMU_IMG commit -b "subdir/t.$IMGFMT.mid" "subdir/t.$IMGFMT" 2>&1 | \ 167 _filter_imgfmt 168 169# This should work as well 170$QEMU_IMG commit -b "$TEST_DIR/subdir/t.$IMGFMT.mid" "subdir/t.$IMGFMT" 171 172popd > /dev/null 173 174# Now let's try with just absolute filenames 175# (This will not work with external data files, though, because when 176# using relative paths for those, qemu will always resolve them 177# relative to its CWD. Therefore, it cannot find those data files now 178# that we left $TEST_DIR.) 179if _get_data_file '' > /dev/null; then 180 echo 'Image committed.' # Skip test 181else 182 $QEMU_IMG commit -b "$TEST_DIR/subdir/t.$IMGFMT.mid" \ 183 "$TEST_DIR/subdir/t.$IMGFMT" 184fi 185 186# success, all done 187echo "*** done" 188rm -f $seq.full 189status=0 190