mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Yang Xu
6be48523d4
The nfs_export feature was introduced since kernel v4.16-rc1 after
commit f168f1098dd9038 ("ovl: add support for "nfs_export"
configuration"). On old kernel, this case will result in infinite
loop because overlay mount failed because of unrecognized mount
options nfs_export=off.
In kernel documentation, overlay.rst said "the mount options
index=off,nfs_export=on are conflicting for a read-write mount and
will result in an error.". So using single index=off is also ok in
here.
Signed-off-by: Yang Xu <xuyang2018.jy@fujitsu.com>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
109 lines
2.9 KiB
Bash
Executable File
109 lines
2.9 KiB
Bash
Executable File
#! /bin/bash
|
|
# SPDX-License-Identifier: GPL-2.0-or-later
|
|
# Copyright (c) 2021 Oracle. All Rights Reserved.
|
|
#
|
|
# FS QA Test No. 631
|
|
#
|
|
# Reproducer for a deadlock in xfs_rename reported by Wenli Xie.
|
|
#
|
|
# When overlayfs is running on top of xfs and the user unlinks a file in the
|
|
# overlay, overlayfs will create a whiteout inode and ask us to "rename" the
|
|
# whiteout file atop the one being unlinked. If the file being unlinked loses
|
|
# its one nlink, we then have to put the inode on the unlinked list.
|
|
#
|
|
# This requires us to grab the AGI buffer of the whiteout inode to take it
|
|
# off the unlinked list (which is where whiteouts are created) and to grab
|
|
# the AGI buffer of the file being deleted. If the whiteout was created in
|
|
# a higher numbered AG than the file being deleted, we'll lock the AGIs in
|
|
# the wrong order and deadlock.
|
|
#
|
|
# Note that this test doesn't do anything xfs-specific so it's a generic test.
|
|
# This is a regression test for commit 6da1b4b1ab36 ("xfs: fix an ABBA deadlock
|
|
# in xfs_rename").
|
|
|
|
seq=`basename $0`
|
|
seqres=$RESULT_DIR/$seq
|
|
echo "QA output created by $seq"
|
|
|
|
here=`pwd`
|
|
tmp=/tmp/$$
|
|
status=1 # failure is the default!
|
|
trap "_cleanup; exit \$status" 0 1 2 3 15
|
|
|
|
_cleanup()
|
|
{
|
|
stop_workers
|
|
cd /
|
|
rm -f $tmp.*
|
|
}
|
|
|
|
# get standard environment, filters and checks
|
|
. ./common/rc
|
|
|
|
# real QA test starts here
|
|
_supported_fs generic
|
|
_require_scratch
|
|
test "$FSTYP" = "overlay" && _notrun "Test does not apply to overlayfs."
|
|
_require_extra_fs overlay
|
|
|
|
rm -f $seqres.full
|
|
|
|
_scratch_mkfs >> $seqres.full
|
|
_scratch_mount
|
|
_supports_filetype $SCRATCH_MNT || _notrun "overlayfs test requires d_type"
|
|
|
|
mkdir $SCRATCH_MNT/lowerdir
|
|
mkdir $SCRATCH_MNT/lowerdir1
|
|
mkdir $SCRATCH_MNT/lowerdir/etc
|
|
mkdir $SCRATCH_MNT/workers
|
|
echo salts > $SCRATCH_MNT/lowerdir/etc/access.conf
|
|
touch $SCRATCH_MNT/running
|
|
|
|
stop_workers() {
|
|
test -e $SCRATCH_MNT/running || return
|
|
rm -f $SCRATCH_MNT/running
|
|
|
|
while [ "$(ls $SCRATCH_MNT/workers/ | wc -l)" -gt 0 ]; do
|
|
wait
|
|
done
|
|
}
|
|
|
|
worker() {
|
|
local tag="$1"
|
|
local mergedir="$SCRATCH_MNT/merged$tag"
|
|
local l="lowerdir=$SCRATCH_MNT/lowerdir:$SCRATCH_MNT/lowerdir1"
|
|
local u="upperdir=$SCRATCH_MNT/upperdir$tag"
|
|
local w="workdir=$SCRATCH_MNT/workdir$tag"
|
|
local i="index=off"
|
|
|
|
touch $SCRATCH_MNT/workers/$tag
|
|
while test -e $SCRATCH_MNT/running; do
|
|
rm -rf $SCRATCH_MNT/merged$tag
|
|
rm -rf $SCRATCH_MNT/upperdir$tag
|
|
rm -rf $SCRATCH_MNT/workdir$tag
|
|
mkdir $SCRATCH_MNT/merged$tag
|
|
mkdir $SCRATCH_MNT/workdir$tag
|
|
mkdir $SCRATCH_MNT/upperdir$tag
|
|
|
|
mount -t overlay overlay -o "$l,$u,$w,$i" $mergedir
|
|
mv $mergedir/etc/access.conf $mergedir/etc/access.conf.bak
|
|
touch $mergedir/etc/access.conf
|
|
mv $mergedir/etc/access.conf $mergedir/etc/access.conf.bak
|
|
touch $mergedir/etc/access.conf
|
|
umount $mergedir
|
|
done
|
|
rm -f $SCRATCH_MNT/workers/$tag
|
|
}
|
|
|
|
for i in $(seq 0 $((4 + LOAD_FACTOR)) ); do
|
|
worker $i &
|
|
done
|
|
|
|
sleep $((30 * TIME_FACTOR))
|
|
stop_workers
|
|
|
|
echo Silence is golden.
|
|
# success, all done
|
|
status=0
|
|
exit
|