apfstests/tests/overlay/009

#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2016 Red Hat Inc.  All Rights Reserved.
#
# FS QA Test 009
#
# dentry leak for default_permissions mount option
#
# This is fixed by kernel commit named as
# ovl: fix dentry leak for default_permissions
#
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()
{
	cd /
	rm -f $tmp.*
}

# get standard environment, filters and checks
. ./common/rc
. ./common/filter

rm -f $seqres.full

# real QA test starts here
_supported_fs overlay
_supported_os Linux
_require_scratch

# Remove all files from previous tests
_scratch_mkfs

# Create test file in lowerdir
lowerdir=$OVL_BASE_SCRATCH_MNT/$OVL_LOWER
mkdir -p $lowerdir
touch $lowerdir/testfile

# mount overlay with default_permissions option, get a reference on the dentry
_scratch_mount -o default_permissions
cat $SCRATCH_MNT/testfile

# overlay will be unmounted by test harness and kernel BUG if dentry leaked
echo "Silence is golden"
status=0
exit