190 lines
5.2 KiB
Bash
Executable file
190 lines
5.2 KiB
Bash
Executable file
#!/usr/bin/env bash
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# group: rw backing auto quick
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#
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# Commit changes to backing file
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#
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# Copyright (C) 2009 Red Hat, Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# creator
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owner=kwolf@redhat.com
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seq=`basename $0`
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echo "QA output created by $seq"
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status=1 # failure is the default!
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_cleanup()
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{
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_cleanup_test_img
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_rm_test_img "$TEST_IMG.base"
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_rm_test_img "$TEST_IMG.orig"
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_rm_test_img "$TEST_DIR/subdir/t.$IMGFMT.base"
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_rm_test_img "$TEST_DIR/subdir/t.$IMGFMT.mid"
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_rm_test_img "$TEST_DIR/subdir/t.$IMGFMT"
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rmdir "$TEST_DIR/subdir" &> /dev/null
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}
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trap "_cleanup; exit \$status" 0 1 2 3 15
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# get standard environment, filters and checks
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. ./common.rc
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. ./common.filter
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. ./common.pattern
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# Any format supporting backing files
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_supported_fmt qcow qcow2 vmdk qed
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_supported_proto file
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_unsupported_imgopts "subformat=monolithicFlat" \
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"subformat=twoGbMaxExtentFlat" \
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"subformat=twoGbMaxExtentSparse" \
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"subformat=streamOptimized"
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TEST_OFFSETS="0 4294967296"
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TEST_IMG_SAVE="$TEST_IMG"
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TEST_IMG="$TEST_IMG.base"
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_make_test_img 6G
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echo "Filling base image"
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echo
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for offset in $TEST_OFFSETS; do
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# Some clusters with alternating backing file/image file reads
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io writev $(( offset )) 512 1024 64
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# Complete backing clusters
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io writev $(( offset + 64 * 1024)) 65536 65536 1
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done
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_check_test_img
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echo "Creating test image with backing file"
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echo
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TEST_IMG="$TEST_IMG_SAVE"
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_make_test_img -b "$TEST_IMG.base" -F $IMGFMT 6G
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echo "Filling test image"
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echo
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for offset in $TEST_OFFSETS; do
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# Some clusters with alternating backing file/image file reads
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io writev $(( offset + 512 )) 512 1024 64
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# Complete test image clusters
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io writev $(( offset + 64 * 1024 + 65536)) 65536 65536 1
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done
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_check_test_img
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$QEMU_IMG commit "$TEST_IMG"
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TEST_IMG="$TEST_IMG.base"
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echo "Reading from the backing file"
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echo
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for offset in $TEST_OFFSETS; do
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# Some clusters with alternating backing file/image file reads
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io readv $(( offset )) 512 1024 64
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io readv $(( offset + 512 )) 512 1024 64
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# Complete test image clusters
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io readv $(( offset + 64 * 1024)) 65536 65536 1
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io readv $(( offset + 64 * 1024 + 65536)) 65536 65536 1
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# Empty sectors
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io_zero readv $(( offset + 64 * 1024 + 65536 * 4 )) 65536 65536 1
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done
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_check_test_img
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_cleanup
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TEST_IMG=$TEST_IMG_SAVE
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echo
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echo 'Testing failing commit'
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echo
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TEST_IMG="$TEST_IMG.base" _make_test_img 1M
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# Create an image with a null backing file to which committing will fail (with
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# ENOSPC so we can distinguish the result from some generic EIO which may be
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# generated anywhere in the block layer)
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backing="json:{'driver': '$IMGFMT',
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'file': {
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'driver': 'blkdebug',
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'inject-error': [{
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'event': 'write_aio',
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'errno': 28,
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'once': true
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}],
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'image': {
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'driver': 'file',
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'filename': '$TEST_IMG.base'
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}}}"
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# Filter out newlines and collapse spaces
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backing=$(echo "$backing" | tr -d '\n' | tr -s ' ')
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_make_test_img -b "$backing" -F $IMGFMT
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# Just write anything so committing will not be a no-op
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$QEMU_IO -c 'writev 0 64k' "$TEST_IMG" | _filter_qemu_io
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$QEMU_IMG commit "$TEST_IMG"
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_cleanup
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echo
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echo 'Testing commit in sub-directory with relative filenames'
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echo
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pushd "$TEST_DIR" > /dev/null
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mkdir subdir
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TEST_IMG="subdir/t.$IMGFMT.base" _make_test_img 1M
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TEST_IMG="subdir/t.$IMGFMT.mid" _make_test_img -b "t.$IMGFMT.base" -F $IMGFMT
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TEST_IMG="subdir/t.$IMGFMT" _make_test_img -b "t.$IMGFMT.mid" -F $IMGFMT
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# Should work
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$QEMU_IMG commit -b "t.$IMGFMT.mid" "subdir/t.$IMGFMT"
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# Might theoretically work, but does not in practice (we have to
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# decide between this and the above; and since we always represent
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# backing file names as relative to the overlay, we go for the above)
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$QEMU_IMG commit -b "subdir/t.$IMGFMT.mid" "subdir/t.$IMGFMT" 2>&1 | \
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_filter_imgfmt
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# This should work as well
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$QEMU_IMG commit -b "$TEST_DIR/subdir/t.$IMGFMT.mid" "subdir/t.$IMGFMT"
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popd > /dev/null
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# Now let's try with just absolute filenames
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# (This will not work with external data files, though, because when
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# using relative paths for those, qemu will always resolve them
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# relative to its CWD. Therefore, it cannot find those data files now
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# that we left $TEST_DIR.)
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if _get_data_file '' > /dev/null; then
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echo 'Image committed.' # Skip test
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else
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$QEMU_IMG commit -b "$TEST_DIR/subdir/t.$IMGFMT.mid" \
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"$TEST_DIR/subdir/t.$IMGFMT"
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fi
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# success, all done
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echo "*** done"
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rm -f $seq.full
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status=0
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