mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Amir Goldstein
959081e0d3
The check for empty index in this test was wrongly copied from test overlay/034. In test overlay/034 lower file starts as a hardlink, so nlink accounting is done from the first copy up and index can be cleaned on last upper hardlink unlink. In this test, lower starts as non-hardlink, so first copy up does not perform nlink accounting and therefore, union nlink count does not drop to 0 at the end of the test and the index is not expected to be cleaned. Signed-off-by: Amir Goldstein <amir73il@gmail.com> Reviewed-by: Eryu Guan <eguan@redhat.com> Signed-off-by: Eryu Guan <eguan@redhat.com>
135 lines
4.1 KiB
Bash
Executable File
135 lines
4.1 KiB
Bash
Executable File
#! /bin/bash
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# FS QA Test 042
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#
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# Test creating lower hardlinks for copied up files.
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#
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# kernel v4.13 introduced the index=on feature for not breaking hardlinks
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# on copy-up. With the index feature enabled a regression was introduced -
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# lower files that are hardlined while overlay is offline can result in
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# lookup error after overlay in mounted.
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#
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# The regression was fixed by upstream commit
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# 6eaf011144af ovl: fix EIO from lookup of non-indexed upper
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# that was merged to v4.14-rc7.
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#
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# This test verifies that behavior is sane after creating lower hardlinks
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# for copied up files while overlayfs is offline.
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#
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#-----------------------------------------------------------------------
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# Copyright (C) 2017 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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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 $seqres.full
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# real QA test starts here
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_supported_fs overlay
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_supported_os Linux
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_require_scratch
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# Without overlay index feature hardlinks are broken on copy up
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_require_scratch_feature index
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# Remove all files from previous tests
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_scratch_mkfs
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# Create lower file
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lowerdir=$OVL_BASE_SCRATCH_MNT/$OVL_LOWER
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mkdir -p $lowerdir
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touch $lowerdir/0
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# Disable overlay index feature to copy up with no index
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_scratch_mount -o index=off
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# Copy up lower and create upper hardlink with no index
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ln $SCRATCH_MNT/0 $SCRATCH_MNT/1
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$UMOUNT_PROG $SCRATCH_MNT
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# Add lower hardlinks while overlay is offline
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ln $lowerdir/0 $lowerdir/2
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ln $lowerdir/0 $lowerdir/3
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# Enable overlay index feature to lookup copied up upper aliases
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_scratch_mount -o index=on
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# Stat upper hardlink that were created with no index and whose copy up
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# origin is now an hardlink - expect same st_ino
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ino0=$(stat -c '%i' $SCRATCH_MNT/0)
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ino1=$(stat -c '%i' $SCRATCH_MNT/1)
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[[ $ino0 == $ino1 ]] || \
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echo "Mismatch inode number for non-indexed upper hardlinks"
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# Copy up lower and create new upper hardlink with index, because
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# lower is a hardlink and index is enabled. The new hardlinks are not
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# associated with the hardlinks that were created when lower was not
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# a hardlink.
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ln $SCRATCH_MNT/2 $SCRATCH_MNT/4
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# Mount cycle to reset inode/dentry cache
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_scratch_cycle_mount index=on
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# Stat files that were copied up with index and whose copy up origin
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# is now an hardlink - expect same st_ino as lower aliases and different
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# st_ino from non-indexed upper aliases.
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ino0=$(stat -c '%i' $SCRATCH_MNT/0)
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ino1=$(stat -c '%i' $SCRATCH_MNT/1)
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ino2=$(stat -c '%i' $SCRATCH_MNT/2)
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ino3=$(stat -c '%i' $SCRATCH_MNT/3)
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ino4=$(stat -c '%i' $SCRATCH_MNT/4)
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[[ $ino0 == $ino1 ]] || \
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echo "Mismatch inode number for non-indexed upper hardlinks"
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[[ $ino2 == $ino4 ]] || \
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echo "Mismatch inode number for indexed upper hardlinks"
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[[ $ino2 == $ino3 ]] || \
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echo "Mismatch inode number for indexed upper and lower hardlinks"
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[[ $ino2 != $ino0 ]] || \
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echo "Unexpected matching inode number for indexed and non-indexed upper hardlinks"
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# Mount cycle to reset inode/dentry cache
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_scratch_cycle_mount index=on
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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/2
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rm $SCRATCH_MNT/3
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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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