mirror of
https://github.com/linux-apfs/apfstests.git
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Amir Goldstein
0825323485
The test verifies constant inode number after copy up. Verify that inode number remains constant also after rename and drop caches (when overlayfs needs to find the lower inodes in another location). Signed-off-by: Amir Goldstein <amir73il@gmail.com> Reviewed-by: Eryu Guan <eguan@redhat.com> Signed-off-by: Eryu Guan <eguan@redhat.com>
145 lines
3.5 KiB
Bash
Executable File
145 lines
3.5 KiB
Bash
Executable File
#! /bin/bash
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# FSQA Test No. 017
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#
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# Test constant inode numbers
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#
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# This simple test demonstrates a known issue with overlayfs:
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# - stat file A shows inode number X
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# - modify A to trigger copy up
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# - stat file A shows inode number Y != X
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#
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# Also test if d_ino of readdir entries changes after copy up
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# and if inode numbers persist after rename and drop caches.
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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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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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# 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_test_program "af_unix"
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rm -f $seqres.full
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_scratch_mkfs >>$seqres.full 2>&1
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# Create our test files.
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# Not dealing with hardlinks here, when hardlinks are broken they
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# should not preserve the inode number.
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lowerdir=$OVL_BASE_SCRATCH_MNT/$OVL_LOWER
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mkdir -p $lowerdir
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mkdir $lowerdir/dir
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touch $lowerdir/file
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ln -s $lowerdir/file $lowerdir/symlink
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mknod $lowerdir/chrdev c 1 1
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mknod $lowerdir/blkdev b 1 1
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mknod $lowerdir/fifo p
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$here/src/af_unix $lowerdir/socket
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FILES="dir file symlink chrdev blkdev fifo socket"
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# Record inode numbers in format <ino> <basename>
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function record_inode_numbers()
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{
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dir=$1
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outfile=$2
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for f in $FILES; do
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ls -id $dir/$f
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done | \
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while read ino file; do
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echo $ino `basename $file` >> $outfile
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done
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}
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# Check inode numbers match recorder inode numbers
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function check_inode_numbers()
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{
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dir=$1
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before=$2
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after=$3
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record_inode_numbers $dir $after
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# Test constant stat(2) st_ino -
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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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# Test constant readdir(3)/getdents(2) d_ino -
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# Expect to find file by inode number
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cat $before | while read ino f; do
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find $dir/ -maxdepth 1 -inum $ino | grep -q $f || \
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echo "$f not found by ino $ino (from $before)"
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done
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}
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_scratch_mount
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rm -f $tmp.*
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testdir=$SCRATCH_MNT/test
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mkdir -p $testdir
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# Record inode numbers before copy up
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record_inode_numbers $SCRATCH_MNT $tmp.before
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for f in $FILES; do
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# chown -h modifies all those file types
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chown -h 100 $SCRATCH_MNT/$f
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done
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# Compare inode numbers before/after copy up
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check_inode_numbers $SCRATCH_MNT $tmp.before $tmp.after_copyup
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for f in $FILES; do
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# move to another dir
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mv $SCRATCH_MNT/$f $testdir/
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done
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echo 3 > /proc/sys/vm/drop_caches
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# Compare inode numbers before/after rename and drop caches
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check_inode_numbers $testdir $tmp.after_copyup $tmp.after_move
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echo "Silence is golden"
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status=0
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exit
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