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>
89 lines
2.2 KiB
Bash
Executable File
89 lines
2.2 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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# FS QA Test 059
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#
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# Test multiple origin references to the same lower file.
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#
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# Multiple origin references to the same lower file from upper files that
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# are not hardlinks will falsely return the same st_ino/st_dev for two
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# different overlay files and will cause 'diff' to falsely report that
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# content of files is the same when it is not.
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#
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# This test checks that overlayfs detects and fails lookup of a multiply
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# referenced origin.
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#
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# The check for multiply referenced origin was a by-product of kernel
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# commit 31747eda41ef ("ovl: hash directory inodes for fsnotify")
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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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# Rename lower file to create copy up with origin xattr
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create_origin_ref()
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{
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local ref=$1
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touch $lowerdir/origin
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# Enabling redirect_dir may seem irrelevant to rename of non-dir,
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# but with upcoming 'metacopy' feature, redirects will be set also
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# on non-dir and may also create multiple redirects.
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_scratch_mount -o redirect_dir=on
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mv $SCRATCH_MNT/origin $SCRATCH_MNT/$ref
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$UMOUNT_PROG $SCRATCH_MNT
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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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rm -f $seqres.full
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# real QA test starts here
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_supported_fs overlay
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_require_scratch_nocheck
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_require_scratch_feature redirect_dir
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# remove all files from previous runs
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_scratch_mkfs
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upperdir=$OVL_BASE_SCRATCH_MNT/$OVL_UPPER
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lowerdir=$OVL_BASE_SCRATCH_MNT/$OVL_LOWER
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# Create copied up file with origin xattr
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create_origin_ref ref1
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# Duplicate the copied up file
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cp -a $upperdir/ref1 $upperdir/ref2
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# Diverge the content of the two copies of file
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# and the content of two copies of redirected dir
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echo right >> $upperdir/ref1
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echo wrong >> $upperdir/ref2
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_scratch_mount -o redirect_dir=on
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# If both copies of file use the same st_dev/st_ino in overlay
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# diff won't detect that their content differs
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diff -q $SCRATCH_MNT/ref1 $SCRATCH_MNT/ref2 &>/dev/null && \
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echo "diff on duplicated upper files doesn't know right from wrong!"
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# success, all done
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echo "Silence is golden"
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status=0
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exit
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