| 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 |