mirror of
https://github.com/linux-apfs/apfstests.git
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Darrick J. Wong
a860a167d8
fstests only supports Linux, so get rid of this unnecessary predicate. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Eryu Guan <guaneryu@gmail.com>
99 lines
2.9 KiB
Bash
Executable File
99 lines
2.9 KiB
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (C) 2015 SUSE Linux Products GmbH. All Rights Reserved.
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#
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# FSQA Test No. 103
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#
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# Regression test for file read corruption when using compressed extents that
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# are shared by multiple consecutive ranges of the same file.
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#
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seq=`basename $0`
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seqres=$RESULT_DIR/$seq
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echo "QA output created by $seq"
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tmp=/tmp/$$
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status=1 # failure is the default!
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trap "_cleanup; exit \$status" 0 1 2 3 15
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_cleanup()
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{
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rm -f $tmp.*
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}
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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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# real QA test starts here
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_supported_fs btrfs
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_require_scratch
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_require_cloner
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rm -f $seqres.full
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test_clone_and_read_compressed_extent()
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{
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local mount_opts=$1
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_scratch_mkfs >>$seqres.full 2>&1
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_scratch_mount $mount_opts
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BLOCK_SIZE=$(_get_block_size $SCRATCH_MNT)
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# Create a test file with a single extent that is compressed (the
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# data we write into it is highly compressible no matter which
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# compression algorithm is used, zlib or lzo).
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$XFS_IO_PROG -f -c "pwrite -S 0xaa 0K $((1 * $BLOCK_SIZE))" \
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-c "pwrite -S 0xbb $((1 * $BLOCK_SIZE)) $((2 * $BLOCK_SIZE))" \
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-c "pwrite -S 0xcc $((3 * $BLOCK_SIZE)) $((1 * $BLOCK_SIZE))" \
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$SCRATCH_MNT/foo | _filter_xfs_io_blocks_modified
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# Now clone our extent into an adjacent offset.
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$CLONER_PROG -s $((1 * $BLOCK_SIZE)) -d $((4 * $BLOCK_SIZE)) \
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-l $((2 * $BLOCK_SIZE)) $SCRATCH_MNT/foo $SCRATCH_MNT/foo
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# Same as before but for this file we clone the extent into a lower
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# file offset.
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$XFS_IO_PROG -f \
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-c "pwrite -S 0xaa $((2 * $BLOCK_SIZE)) $((1 * $BLOCK_SIZE))" \
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-c "pwrite -S 0xbb $((3 * $BLOCK_SIZE)) $((2 * $BLOCK_SIZE))" \
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-c "pwrite -S 0xcc $((5 * $BLOCK_SIZE)) $((1 * $BLOCK_SIZE))" \
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$SCRATCH_MNT/bar | _filter_xfs_io_blocks_modified
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$CLONER_PROG -s $((3 * $BLOCK_SIZE)) -d 0 -l $((2 * $BLOCK_SIZE)) \
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$SCRATCH_MNT/bar $SCRATCH_MNT/bar
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echo "File contents before unmounting filesystem:"
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echo "foo:"
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od -t x1 $SCRATCH_MNT/foo | _filter_od
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echo "bar:"
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od -t x1 $SCRATCH_MNT/bar | _filter_od
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# Evicting the inode or clearing the page cache before reading again
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# the file would also trigger the bug - reads were returning all bytes
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# in the range corresponding to the second reference to the extent with
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# a value of 0, but the correct data was persisted (it was a bug
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# exclusively in the read path). The issue happened only if the same
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# readpages() call targeted pages belonging to the first and second
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# ranges that point to the same compressed extent.
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_scratch_cycle_mount
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echo "File contents after mounting filesystem again:"
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# Must match the same contents we got before.
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echo "foo:"
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od -t x1 $SCRATCH_MNT/foo | _filter_od
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echo "bar:"
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od -t x1 $SCRATCH_MNT/bar | _filter_od
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}
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echo -e "\nTesting with zlib compression..."
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test_clone_and_read_compressed_extent "-o compress=zlib"
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_scratch_unmount
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echo -e "\nTesting with lzo compression..."
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test_clone_and_read_compressed_extent "-o compress=lzo"
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status=0
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exit
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