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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>
95 lines
2.8 KiB
Bash
Executable File
95 lines
2.8 KiB
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (c) 2019 Red Hat, Inc. All Rights Reserved.
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#
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# FS QA Test No. 538
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#
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# Non-block-aligned direct AIO write test with an initial truncate i_size.
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#
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# Uncover "ext4: Fix data corruption caused by unaligned direct AIO":
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# (Ext4 needs to serialize unaligned direct AIO because the zeroing of
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# partial blocks of two competing unaligned AIOs can result in data
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# corruption.
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#
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# However it decides not to serialize if the potentially unaligned aio is
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# past i_size with the rationale that no pending writes are possible past
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# i_size. Unfortunately if the i_size is not block aligned and the second
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# unaligned write lands past i_size, but still into the same block, it has
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# the potential of corrupting the previous unaligned write to the same
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# 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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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.*
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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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# remove previous $seqres.full before test
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rm -f $seqres.full
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# real QA test starts here
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_supported_fs generic
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_require_test
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_require_aiodio aio-dio-write-verify
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localfile=$TEST_DIR/${seq}-aio-dio-write-verify-testfile
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diosize=`_min_dio_alignment $TEST_DEV`
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blocksize=`_get_block_size $TEST_DIR`
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bufsize=$((blocksize * 2))
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truncsize=$((bufsize+diosize))
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# Need smaller logical block size to do non-block-aligned test
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if [ $diosize -ge $blocksize ];then
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_notrun "Need device logical block size($diosize) < fs block size($blocksize)"
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fi
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rm -rf $localfile 2>/dev/null
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# block-aligned aiodio write verification at first
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$AIO_TEST -a size=$bufsize,off=0 -a size=$bufsize,off=$bufsize $localfile
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# non-block-aligned aiodio write verification
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# **************** **************** ****************
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# * block 1&2 * * block 3&4 * * block 5&6 *
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# **************** **************** ****************
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# existing 0000000000000000 0000000000000000 0000000000000000
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# truncate ---------------->|
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# write 1 ZZZZZZZZZZZZZZZ Z
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# write 2 |<---- ZZZZZZZZZZZZZZZ Z ---->|
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#
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# "Write 1" writes 2 blocks data at off=$diosize.
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# "Write 2" seeks from 0 to "Write 1" end + block size, shift $diosize bytes each
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# time, writes 2 blocksize data too.
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# Verify there's not corruption each time.
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i=0
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while [ $((diosize * i)) -lt $((diosize + bufsize + blocksize)) ];do
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position=$((diosize * i++))
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# non-block-aligned AIO write on different i_size file
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$AIO_TEST -t $truncsize -a size=$bufsize,off=$diosize \
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-a size=$bufsize,off=$position \
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$localfile
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if [ $? -ne 0 ];then
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echo "FAIL: [$truncsize, $bufsize, $diosize, $position]"
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echo "-------------------------------------------------"
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fi
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rm -f $localfile
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done
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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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