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>
90 lines
3.2 KiB
Bash
Executable File
90 lines
3.2 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. 026
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#
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# Test that doing a direct IO write against a file range that contains one
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# prealloc extent and one compressed extent works correctly.
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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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# real QA test starts here
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_supported_fs btrfs
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_require_scratch
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_require_xfs_io_command "falloc"
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rm -f $seqres.full
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_scratch_mkfs >>$seqres.full 2>&1
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_scratch_mount "-o compress"
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# Create a compressed extent covering the range [700K, 800K[.
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$XFS_IO_PROG -f -s -c "pwrite -S 0xaa -b 100K 700K 100K" $SCRATCH_MNT/foo \
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| _filter_xfs_io
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# Create prealloc extent covering the range [600K, 700K[.
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$XFS_IO_PROG -c "falloc 600K 100K" $SCRATCH_MNT/foo
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# Write 80K of data to the range [640K, 720K[ using direct IO. This range covers
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# both the prealloc extent and the compressed extent. Because there's a
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# compressed extent in the range we are writing to, the DIO write code path ends
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# up only writing the first 60k of data, which goes to the prealloc extent, and
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# then falls back to buffered IO for writing the remaining 20K of data - because
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# that remaining data maps to a file range containing a compressed extent.
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# When falling back to buffered IO, we used to trigger an assertion when
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# releasing reserved space due to bad accounting of the inode's outstanding
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# extents counter, which was set to 1 but we ended up decrementing it by 1 twice,
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# once through the ordered extent for the 60K of data we wrote using direct IO,
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# and once through the main direct IO handler (inode.cbtrfs_direct_IO()) because
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# the direct IO write wrote less than 80K of data (60K).
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$XFS_IO_PROG -d -c "pwrite -S 0xbb -b 80K 640K 80K" $SCRATCH_MNT/foo \
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| _filter_xfs_io
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# Now similar test as above but for very large write operations. This triggers
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# special cases for an inode's outstanding extents accounting, as internally
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# btrfs logically splits extents into 128Mb units.
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$XFS_IO_PROG -f -s \
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-c "pwrite -S 0xaa -b 128M 258M 128M" \
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-c "falloc 0 258M" \
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$SCRATCH_MNT/bar | _filter_xfs_io
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$XFS_IO_PROG -d -c "pwrite -S 0xbb -b 256M 3M 256M" $SCRATCH_MNT/bar \
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| _filter_xfs_io
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# Now verify the file contents are correct and that they are the same even after
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# unmounting and mounting the fs again (or evicting the page cache).
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#
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# For file foo, all bytes in the range [0, 640K[ must have a value of 0x00, all
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# bytes in the range [640K, 720K[ must have a value of 0xbb and all bytes in the
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# range [720K, 800K[ must have a value of 0xaa.
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#
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# For file bar, all bytes in the range [0, 3M[ must havea value of 0x00, all
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# bytes in the range [3M, 259M[ must have a value of 0xbb and all bytes in the
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# range [259M, 386M[ must have a value of 0xaa.
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#
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echo "File digests before remounting the file system:"
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md5sum $SCRATCH_MNT/foo | _filter_scratch
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md5sum $SCRATCH_MNT/bar | _filter_scratch
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_scratch_cycle_mount
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echo "File digests after remounting the file system:"
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md5sum $SCRATCH_MNT/foo | _filter_scratch
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md5sum $SCRATCH_MNT/bar | _filter_scratch
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status=0
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exit
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