mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Amir Goldstein
a76feb07aa
Use helpers to records and check inode numbers so we can repeat the same test after each hardlink copy up and mount cycle. Signed-off-by: Amir Goldstein <amir73il@gmail.com> Reviewed-by: Eryu Guan <eguan@redhat.com> Signed-off-by: Eryu Guan <eguan@redhat.com>
107 lines
2.4 KiB
Bash
Executable File
107 lines
2.4 KiB
Bash
Executable File
#! /bin/bash
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# FSQA Test No. 018
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#
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# Test hardlink breakage
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#
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# This simple test demonstrates a known issue with overlayfs:
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# - file A and B are hardlinked in lower
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# - modify A to trigger copy up
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# - file A is no longer a hardlink of file B
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#
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#-----------------------------------------------------------------------
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#
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# Copyright (C) 2016 CTERA Networks. All Rights Reserved.
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# Author: Amir Goldstein <amir73il@gmail.com>
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it would be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write the Free Software Foundation,
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# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#-----------------------------------------------------------------------
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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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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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# 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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rm -f $seqres.full
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_scratch_mkfs >>$seqres.full 2>&1
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# Create 2 hardlinked files in lower
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lowerdir=$OVL_BASE_SCRATCH_MNT/$OVL_LOWER
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mkdir -p $lowerdir
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echo "patient zero" >> $lowerdir/foo
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ln $lowerdir/foo $lowerdir/bar
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# Record inode numbers in format <ino> <nlink>
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function record_ino_nlink()
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{
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ls -li $FILES | awk '{ print $1, $3 }' > $1
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}
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# Check inode numbers match recorded inode numbers
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function check_ino_nlink()
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{
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before=$1
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after=$2
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record_ino_nlink $after
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# Test constant stat(2) st_ino/st_nlink -
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# Compare before..after - expect silence
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# We use diff -u so out.bad will tell us which stage failed
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diff -u $before $after
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}
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_scratch_mount
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rm -f $tmp.*
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foo=$SCRATCH_MNT/foo
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bar=$SCRATCH_MNT/bar
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FILES="$foo $bar"
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record_ino_nlink $tmp.before
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# Modify content of one of the hardlinks
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echo "mutated" >> $foo
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check_ino_nlink $tmp.before $tmp.after
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# Compare content of files - expect silence
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diff $foo $bar
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echo "Silence is golden"
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status=0
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exit
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