mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Dave Chinner
0c1a95d067
Fully scripted conversion, see script in initial SPDX license commit message. Signed-off-by: Dave Chinner <dchinner@redhat.com>
141 lines
2.9 KiB
Bash
Executable File
141 lines
2.9 KiB
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (C) 2017 CTERA Networks. All Rights Reserved.
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#
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# FS QA Test 033
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#
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# Test nlink accounting of overlay hardlinks.
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#
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# nlink of overlay inode should account for the union of lower and upper
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# hardlinks.
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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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_supported_os Linux
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_require_scratch
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_require_scratch_feature index
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report_nlink()
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{
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when=$1
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[ $DCACHETEMP != cold ] || echo 2 > /proc/sys/vm/drop_caches
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# check nlink with warm dcache after overlay modification
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# List <nlink> <name>
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echo "== $when - $DCACHETEMP dcache =="
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for f in $HARDLINKS; do
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_ls_l $SCRATCH_MNT/$f | awk '{ print $2, $9 }' | _filter_scratch
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done
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}
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# Create lower hardlinks
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create_hardlinks()
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{
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mkdir -p $lowerdir
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touch $lowerdir/0
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ln $lowerdir/0 $lowerdir/1
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ln $lowerdir/0 $lowerdir/2
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ln $lowerdir/0 $lowerdir/3
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}
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test_hardlinks()
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{
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HARDLINKS=`seq 0 3`
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report_nlink "all lower"
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# Unlink lower hardlink
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rm $SCRATCH_MNT/0
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HARDLINKS=`seq 1 3`
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report_nlink "unlink lower"
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# Link to lower hardlink
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ln $SCRATCH_MNT/3 $SCRATCH_MNT/4
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HARDLINKS=`seq 1 4`
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report_nlink "link lower"
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# Link to upper hardlink
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ln $SCRATCH_MNT/4 $SCRATCH_MNT/5
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HARDLINKS=`seq 1 5`
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report_nlink "link upper"
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# Rename over lower hardlink
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touch $SCRATCH_MNT/new
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mv $SCRATCH_MNT/new $SCRATCH_MNT/1
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HARDLINKS=`seq 2 5`
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report_nlink "cover lower"
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# Unlink upper hardlink
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rm $SCRATCH_MNT/5
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HARDLINKS=`seq 2 4`
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report_nlink "unlink upper"
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# Rename over upper hardlink
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touch $SCRATCH_MNT/new
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mv $SCRATCH_MNT/new $SCRATCH_MNT/4
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HARDLINKS=`seq 2 3`
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report_nlink "cover upper"
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# Unlink last upper (union still has one lower)
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rm $SCRATCH_MNT/3
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HARDLINKS=2
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report_nlink "unlink last upper"
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# Unlink last lower and drop union nlink to zero (and hopefully not below)
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rm $SCRATCH_MNT/2
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# Verify that orphan index is cleaned when dropping nlink to zero
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# With nfs_export=on index will contain a whiteout index entry, so allow
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# chardev entries in index dir.
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find $workdir/index -mindepth 1 -type c -o -print
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}
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lowerdir=$OVL_BASE_SCRATCH_MNT/$OVL_LOWER
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workdir=$OVL_BASE_SCRATCH_MNT/$OVL_WORK
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# Remove all files from previous tests
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_scratch_mkfs
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# Create lower hardlinks
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create_hardlinks
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# Enable overlay index feature to prevent breaking hardlinks on copy up
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_scratch_mount -o index=on
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# Test hardlinks with warm dcache
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DCACHETEMP=warm
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test_hardlinks
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# Reset to lower hardlinks
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_scratch_unmount
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_scratch_mkfs
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create_hardlinks
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_scratch_mount -o index=on
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# Test hardlinks with cold dcache
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DCACHETEMP=cold
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test_hardlinks
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status=0
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exit
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