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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>
100 lines
3.4 KiB
Bash
Executable File
100 lines
3.4 KiB
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (C) 2018 SUSE Linux Products GmbH. All Rights Reserved.
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#
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# FS QA Test No. 517
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#
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# Test that deduplication of an entire file that has a size that is not aligned
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# to the filesystem's block size into the middle of a different file does not
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# corrupt the destination's file data by reflinking the last (eof) block.
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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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cd /
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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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. ./common/reflink
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# real QA test starts here
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_supported_fs generic
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_require_scratch_dedupe
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rm -f $seqres.full
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_scratch_mkfs >>$seqres.full 2>&1
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_scratch_mount
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# The first byte with a value of 0xae starts at an offset (512Kb + 100) which is
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# not a multiple of the block size.
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$XFS_IO_PROG -f \
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-c "pwrite -S 0x6b 0 524388" \
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-c "pwrite -S 0xae 524388 256K" \
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$SCRATCH_MNT/foo | _filter_xfs_io
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# Create a second file with a length not aligned to the block size (128K + 100),
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# whose bytes all have the value 0x6b, so that its extent(s) can be deduplicated
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# with the first file.
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$XFS_IO_PROG -f -c "pwrite -S 0x6b 0 131172" $SCRATCH_MNT/bar | _filter_xfs_io
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# The file is filled with bytes having the value 0x6b from offset 0 to offset
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# 524388 (512K + 100) and with the value 0xae from offset 524388 to offset
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# 786532 (512K + 100 + 256K).
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echo "File content before first deduplication:"
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od -A d -t x1 $SCRATCH_MNT/foo
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# Now deduplicate the entire second file into a range of the first file that
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# also has all bytes with the value 0x6b. The destination range's end offset
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# must not be aligned to the block size and must be less then the offset of
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# the first byte with the value 0xae (byte at offset 524388).
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$XFS_IO_PROG -c "dedupe $SCRATCH_MNT/bar 0 64K 131172" $SCRATCH_MNT/foo \
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| _filter_xfs_io
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# We should have exactly the same data we had before we asked for deduplication.
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echo "File content after first deduplication and before unmounting:"
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od -A d -t x1 $SCRATCH_MNT/foo
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# Unmount the filesystem and mount it again. This guarantees any file data in
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# the page cache is dropped.
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_scratch_cycle_mount
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# We should have exactly the same data we had before we asked for deduplication.
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echo "File content after first unmount:"
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od -A d -t x1 $SCRATCH_MNT/foo
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# Now do a similar test when trying to dedup just the last (eof) block of a file
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# into the middle of another file. This triggered a different bug on btrfs.
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$XFS_IO_PROG -f -c "pwrite -S 0xae 0 100" $SCRATCH_MNT/baz | _filter_xfs_io
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# Unmount the filesystem and mount it again before attempting to dedupe baz's
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# last block into foo. This is necessary to trigger that btrfs bug mentioned
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# before.
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_scratch_cycle_mount
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# Now attempt to dedupe the single block of baz into foo. The destination range,
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# in file foo, has all bytes with the same value (0xae) as file baz.
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$XFS_IO_PROG -c "dedupe $SCRATCH_MNT/baz 0 640K 100" $SCRATCH_MNT/foo \
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| _filter_xfs_io
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# Now attempt to unmount the filesystem before reading from the file. This is
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# meant to trigger the btrfs bug which caused an infinite loop during inode
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# eviction.
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_scratch_cycle_mount
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# We should have exactly the same data we had before we asked for deduplication.
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echo "File content after second deduplication:"
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od -A d -t x1 $SCRATCH_MNT/foo
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status=0
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exit
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