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Chandan Babu R
172b311e6f
xfs/{529,531,532,534,535} attempt to create test files after injecting
reduce_max_iextents error tag. Creation of test files fails when using a
multi-block directory test configuration because,
1. A directory can have a pseudo maximum extent count of 10.
2. In the worst case a directory entry creation operation can consume
(XFS_DA_NODE_MAXDEPTH + 1 + 1) * (Nr fs blocks in a single directory block)
extents.
With 1k fs block size and 4k directory block size, this evaluates to,
(5 + 1 + 1) * 4
= 7 * 4
= 28
> 10 (Pseudo maximum inode extent count).
This commit fixes the issue by creating test files before injecting
reduce_max_iextents error tag.
Reported-by: Darrick J. Wong <djwong@kernel.org>
Suggested-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Chandan Babu R <chandanrlinux@gmail.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
116 lines
2.7 KiB
Bash
Executable File
116 lines
2.7 KiB
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (c) 2021 Chandan Babu R. All Rights Reserved.
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#
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# FS QA Test 535
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#
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# Verify that XFS does not cause inode fork's extent count to overflow when
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# writing to a shared extent.
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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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. ./common/reflink
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. ./common/inject
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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 xfs
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_require_scratch
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_require_scratch_reflink
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_require_xfs_debug
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_require_xfs_io_command "reflink"
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_require_xfs_io_command "funshare"
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_require_xfs_io_error_injection "reduce_max_iextents"
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echo "Format and mount fs"
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_scratch_mkfs_sized $((512 * 1024 * 1024)) >> $seqres.full
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_scratch_mount >> $seqres.full
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bsize=$(_get_block_size $SCRATCH_MNT)
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nr_blks=15
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srcfile=${SCRATCH_MNT}/srcfile
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dstfile=${SCRATCH_MNT}/dstfile
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touch $srcfile
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touch $dstfile
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echo "Inject reduce_max_iextents error tag"
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_scratch_inject_error reduce_max_iextents 1
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echo "Create a \$srcfile having an extent of length $nr_blks blocks"
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$XFS_IO_PROG -f -c "pwrite -b $((nr_blks * bsize)) 0 $((nr_blks * bsize))" \
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-c fsync $srcfile >> $seqres.full
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echo "* Write to shared extent"
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echo "Share the extent with \$dstfile"
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_reflink $srcfile $dstfile >> $seqres.full
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echo "Buffered write to every other block of \$dstfile's shared extent"
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for i in $(seq 1 2 $((nr_blks - 1))); do
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$XFS_IO_PROG -f -s -c "pwrite $((i * bsize)) $bsize" $dstfile \
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>> $seqres.full 2>&1
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[[ $? != 0 ]] && break
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done
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echo "Verify \$dstfile's extent count"
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nextents=$(_xfs_get_fsxattr nextents $dstfile)
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if (( $nextents > 10 )); then
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echo "Extent count overflow check failed: nextents = $nextents"
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exit 1
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fi
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echo "Disable reduce_max_iextents error tag"
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_scratch_inject_error reduce_max_iextents 0
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rm $dstfile
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echo "* Funshare shared extent"
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touch $dstfile
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echo "Inject reduce_max_iextents error tag"
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_scratch_inject_error reduce_max_iextents 1
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echo "Share the extent with \$dstfile"
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_reflink $srcfile $dstfile >> $seqres.full
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echo "Funshare every other block of \$dstfile's shared extent"
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for i in $(seq 1 2 $((nr_blks - 1))); do
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$XFS_IO_PROG -f -s -c "funshare $((i * bsize)) $bsize" $dstfile \
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>> $seqres.full 2>&1
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[[ $? != 0 ]] && break
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done
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echo "Verify \$dstfile's extent count"
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nextents=$(_xfs_get_fsxattr nextents $dstfile)
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if (( $nextents > 10 )); then
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echo "Extent count overflow check failed: nextents = $nextents"
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exit 1
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fi
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# success, all done
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status=0
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exit
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