020 (5336B)
1 #!/usr/bin/env bash 2 # group: rw backing auto quick 3 # 4 # Commit changes to backing file 5 # 6 # Copyright (C) 2009 Red Hat, Inc. 7 # 8 # This program is free software; you can redistribute it and/or modify 9 # it under the terms of the GNU General Public License as published by 10 # the Free Software Foundation; either version 2 of the License, or 11 # (at your option) any later version. 12 # 13 # This program is distributed in the hope that it will be useful, 14 # but WITHOUT ANY WARRANTY; without even the implied warranty of 15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 # GNU General Public License for more details. 17 # 18 # You should have received a copy of the GNU General Public License 19 # along with this program. If not, see <http://www.gnu.org/licenses/>. 20 # 21 22 # creator 23 owner=kwolf@redhat.com 24 25 seq=`basename $0` 26 echo "QA output created by $seq" 27 28 status=1 # failure is the default! 29 30 _cleanup() 31 { 32 _cleanup_test_img 33 _rm_test_img "$TEST_IMG.base" 34 _rm_test_img "$TEST_IMG.orig" 35 36 _rm_test_img "$TEST_DIR/subdir/t.$IMGFMT.base" 37 _rm_test_img "$TEST_DIR/subdir/t.$IMGFMT.mid" 38 _rm_test_img "$TEST_DIR/subdir/t.$IMGFMT" 39 rmdir "$TEST_DIR/subdir" &> /dev/null 40 } 41 trap "_cleanup; exit \$status" 0 1 2 3 15 42 43 # get standard environment, filters and checks 44 . ./common.rc 45 . ./common.filter 46 . ./common.pattern 47 48 # Any format supporting backing files 49 _supported_fmt qcow qcow2 vmdk qed 50 _supported_proto file 51 _unsupported_imgopts "subformat=monolithicFlat" \ 52 "subformat=twoGbMaxExtentFlat" \ 53 "subformat=twoGbMaxExtentSparse" \ 54 "subformat=streamOptimized" 55 56 TEST_OFFSETS="0 4294967296" 57 58 TEST_IMG_SAVE="$TEST_IMG" 59 TEST_IMG="$TEST_IMG.base" 60 61 _make_test_img 6G 62 63 echo "Filling base image" 64 echo 65 66 for offset in $TEST_OFFSETS; do 67 # Some clusters with alternating backing file/image file reads 68 io writev $(( offset )) 512 1024 64 69 70 # Complete backing clusters 71 io writev $(( offset + 64 * 1024)) 65536 65536 1 72 done 73 _check_test_img 74 75 echo "Creating test image with backing file" 76 echo 77 78 TEST_IMG="$TEST_IMG_SAVE" 79 _make_test_img -b "$TEST_IMG.base" -F $IMGFMT 6G 80 81 echo "Filling test image" 82 echo 83 84 for offset in $TEST_OFFSETS; do 85 # Some clusters with alternating backing file/image file reads 86 io writev $(( offset + 512 )) 512 1024 64 87 88 # Complete test image clusters 89 io writev $(( offset + 64 * 1024 + 65536)) 65536 65536 1 90 done 91 _check_test_img 92 93 $QEMU_IMG commit "$TEST_IMG" 94 TEST_IMG="$TEST_IMG.base" 95 96 echo "Reading from the backing file" 97 echo 98 99 for offset in $TEST_OFFSETS; do 100 # Some clusters with alternating backing file/image file reads 101 io readv $(( offset )) 512 1024 64 102 io readv $(( offset + 512 )) 512 1024 64 103 104 # Complete test image clusters 105 io readv $(( offset + 64 * 1024)) 65536 65536 1 106 io readv $(( offset + 64 * 1024 + 65536)) 65536 65536 1 107 108 # Empty sectors 109 io_zero readv $(( offset + 64 * 1024 + 65536 * 4 )) 65536 65536 1 110 done 111 _check_test_img 112 _cleanup 113 TEST_IMG=$TEST_IMG_SAVE 114 115 echo 116 echo 'Testing failing commit' 117 echo 118 119 TEST_IMG="$TEST_IMG.base" _make_test_img 1M 120 121 # Create an image with a null backing file to which committing will fail (with 122 # ENOSPC so we can distinguish the result from some generic EIO which may be 123 # generated anywhere in the block layer) 124 backing="json:{'driver': '$IMGFMT', 125 'file': { 126 'driver': 'blkdebug', 127 'inject-error': [{ 128 'event': 'write_aio', 129 'errno': 28, 130 'once': true 131 }], 132 'image': { 133 'driver': 'file', 134 'filename': '$TEST_IMG.base' 135 }}}" 136 137 # Filter out newlines and collapse spaces 138 backing=$(echo "$backing" | tr -d '\n' | tr -s ' ') 139 140 _make_test_img -b "$backing" -F $IMGFMT 141 142 # Just write anything so committing will not be a no-op 143 $QEMU_IO -c 'writev 0 64k' "$TEST_IMG" | _filter_qemu_io 144 145 $QEMU_IMG commit "$TEST_IMG" 146 _cleanup 147 148 149 echo 150 echo 'Testing commit in sub-directory with relative filenames' 151 echo 152 153 pushd "$TEST_DIR" > /dev/null 154 155 mkdir subdir 156 157 TEST_IMG="subdir/t.$IMGFMT.base" _make_test_img 1M 158 TEST_IMG="subdir/t.$IMGFMT.mid" _make_test_img -b "t.$IMGFMT.base" -F $IMGFMT 159 TEST_IMG="subdir/t.$IMGFMT" _make_test_img -b "t.$IMGFMT.mid" -F $IMGFMT 160 161 # Should work 162 $QEMU_IMG commit -b "t.$IMGFMT.mid" "subdir/t.$IMGFMT" 163 164 # Might theoretically work, but does not in practice (we have to 165 # decide between this and the above; and since we always represent 166 # backing file names as relative to the overlay, we go for the above) 167 $QEMU_IMG commit -b "subdir/t.$IMGFMT.mid" "subdir/t.$IMGFMT" 2>&1 | \ 168 _filter_imgfmt 169 170 # This should work as well 171 $QEMU_IMG commit -b "$TEST_DIR/subdir/t.$IMGFMT.mid" "subdir/t.$IMGFMT" 172 173 popd > /dev/null 174 175 # Now let's try with just absolute filenames 176 # (This will not work with external data files, though, because when 177 # using relative paths for those, qemu will always resolve them 178 # relative to its CWD. Therefore, it cannot find those data files now 179 # that we left $TEST_DIR.) 180 if _get_data_file '' > /dev/null; then 181 echo 'Image committed.' # Skip test 182 else 183 $QEMU_IMG commit -b "$TEST_DIR/subdir/t.$IMGFMT.mid" \ 184 "$TEST_DIR/subdir/t.$IMGFMT" 185 fi 186 187 # success, all done 188 echo "*** done" 189 rm -f $seq.full 190 status=0