#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2018 Red Hat Inc.  All Rights Reserved.
#
# FS QA Test 063
#
# Create dir over cached negative dentry, but whiteout removed from upper
#
# The following kernel commit fixed the kernel crash: 5e1275808630 ("ovl: check
# whiteout in ovl_create_over_whiteout()")
#
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

# remove previous $seqres.full before test
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
lowerdir=${OVL_BASE_SCRATCH_MNT}/${OVL_LOWER}
upperdir=${OVL_BASE_SCRATCH_MNT}/${OVL_UPPER}
mkdir -p $lowerdir
touch ${lowerdir}/file

_scratch_mount

# Create whiteout and populate dcache with negative dentry
rm ${SCRATCH_MNT}/file
ls -l ${SCRATCH_MNT}/file > /dev/null 2>&1

# Remove whiteout and try to create dir over negative dentry
rm ${upperdir}/file
mkdir ${SCRATCH_MNT}/file > /dev/null 2>&1

# unmount overlayfs
$UMOUNT_PROG $SCRATCH_MNT

echo "Silence is golden"
# success, all done
status=0
exit