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>
87 lines
1.8 KiB
Bash
Executable File
87 lines
1.8 KiB
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (C) 2018 CTERA Networks. All Rights Reserved.
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#
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# FSQA Test No. 061
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#
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# Test memory mapped data inconsistencies
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#
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# This is a variant of test overlay/016 with mread instead of pread.
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#
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# This simple test demonstrates a known issue with overlayfs:
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# - process A created shared ro mmap on file F
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# - process B created shared rw mmap on file F
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# - process B writes new data to shared mmap
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# - process A reads old data from shared mmap
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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 overlay
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_require_scratch
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_require_xfs_io_command "open"
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rm -f $seqres.full
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_scratch_mkfs >>$seqres.full 2>&1
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# Create our test files.
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lowerdir=$OVL_BASE_SCRATCH_MNT/$OVL_LOWER
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mkdir -p $lowerdir
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echo "This is old news" > $lowerdir/foo
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_scratch_mount
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filter_xfs_io_mmap()
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{
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# filter out these lines:
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# [000] 0x7f3d9aece000 - 0x7f3d9aece010 r-- SCRATCH_MNT/foo (0 : 16)
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grep -Fv '[00'
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}
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#
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# mmap MAP_SHARED|PROT_READ of rofd
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# mmap MAP_SHARED|PROT_WRITE of rwfd
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# write to rw mmap
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# read from ro mmap
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#
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$XFS_IO_PROG -r $SCRATCH_MNT/foo \
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-C "mmap -r 0 16" \
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-C "close" \
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-C "open $SCRATCH_MNT/foo" \
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-C "mmap -w 0 16" \
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-C "close" \
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-C "mwrite -S 0x61 0 16" \
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-C "munmap" \
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-C "mread -v 0 16" \
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| _filter_xfs_io | _filter_scratch | filter_xfs_io_mmap
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_scratch_cycle_mount
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# Verify mmap write after close has persisted through mount cycle
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echo "After mount cycle:"
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$XFS_IO_PROG -r $SCRATCH_MNT/foo \
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-C "mmap -r 0 16" \
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-C "mread -v 0 16" \
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| _filter_xfs_io | _filter_scratch
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status=0
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exit
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