mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
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>
85 lines
2.0 KiB
Bash
Executable File
85 lines
2.0 KiB
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (C) 2020 CTERA Networks. All Rights Reserved.
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#
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# FS QA Test 072
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#
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# Test overlay nlink when adding upper hardlinks.
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#
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# nlink of overlay inode could be dropped indefinitely by adding
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# unaccounted upper hardlinks underneath a mounted overlay and
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# trying to remove them.
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#
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# This is a variant of test overlay/034 with mangling of upper instead
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# of lower hardlinks. Unlike overlay/034, this test does not require the
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# inode index feature and will pass whether is it enabled or disabled
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# by default.
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#
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# This is a regression test for kernel commit 83552eacdfc0
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# ("ovl: fix WARN_ON nlink drop to zero").
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# Without the fix, the test triggers
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# WARN_ON(inode->i_nlink == 0) in drop_link().
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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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# remove previous $seqres.full before test
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rm -f $seqres.full
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# real QA test starts here
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_supported_fs overlay
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_require_scratch
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upperdir=$OVL_BASE_SCRATCH_MNT/$OVL_UPPER
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# Remove all files from previous tests
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_scratch_mkfs
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# Create upper hardlink
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mkdir -p $upperdir
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touch $upperdir/0
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ln $upperdir/0 $upperdir/1
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_scratch_mount
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# Verify overlay inode nlink 2 same as upper inode
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stat -c '%h' $SCRATCH_MNT/0
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# Add upper hardlinks while overlay is mounted - overlay inode nlink
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# is not being updated
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ln $upperdir/0 $upperdir/2
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ln $upperdir/0 $upperdir/3
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# Unlink the 2 un-accounted upper hardlinks - overlay inode nlinks
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# drops 2 and may reach 0 if the situation is not detected
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rm $SCRATCH_MNT/2
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rm $SCRATCH_MNT/3
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# Check if getting ENOENT when trying to link !I_LINKABLE with nlink 0
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ln $SCRATCH_MNT/0 $SCRATCH_MNT/4
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# Unlink all hardlinks - if overlay inode nlink is 0, this will trigger
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# WARN_ON() in drop_nlink()
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rm $SCRATCH_MNT/0
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rm $SCRATCH_MNT/1
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rm $SCRATCH_MNT/4
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echo "Silence is golden"
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status=0
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exit
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