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Darrick J. Wong
d38fc1527d
Dave Chinner reports[1] that an appending AIO DIO write to the second block of a zero-length file and an fallocate request to the first block of the same file can race to set isize, with the user-visible end result that the file size is set incorrectly to one block long. Write a small test to reproduce the results. [1] https://lore.kernel.org/linux-xfs/20191029100342.GA41131@bfoster/T/ Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Eryu Guan <guaneryu@gmail.com> Signed-off-by: Eryu Guan <guaneryu@gmail.com>
45 lines
934 B
Bash
Executable File
45 lines
934 B
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0-or-later
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# Copyright (c) 2019, Oracle and/or its affiliates. All Rights Reserved.
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#
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# FS QA Test No. 586
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#
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# Race an appending aio dio write to the second block of a file while
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# simultaneously fallocating to the first block. Make sure that we end up
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# with a two-block file.
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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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here=`pwd`
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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.* $testfile
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}
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# get standard environment, filters and checks
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. ./common/rc
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# real QA test starts here
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_supported_os Linux
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_supported_fs generic
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_require_aiodio "aio-dio-append-write-fallocate-race"
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_require_test
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_require_xfs_io_command "falloc"
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rm -f $seqres.full
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testfile=$TEST_DIR/test-$seq
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$AIO_TEST $testfile 100 >> $seqres.full
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echo Silence is golden.
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# success, all done
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status=0
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exit
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