#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2016 Red Hat Inc.  All Rights Reserved.
#
# FS QA Test 012
#
# The upper dentry may become stale before we remove it from
# overlay, e.g. file was removed from upperdir directly, which
# triggered warning/oops in ovl_remove_and_whiteout().
#
# Commit cfc9fde0b07c ("ovl: verify upper dentry in
# ovl_remove_and_whiteout()") fixed this issue.
#
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
_require_scratch

# remove all files from previous runs
_scratch_mkfs

lowerdir=$OVL_BASE_SCRATCH_MNT/$OVL_LOWER
upperdir=$OVL_BASE_SCRATCH_MNT/$OVL_UPPER
mkdir -p $lowerdir/test

_scratch_mount

# remove test file to create a whiteout
rmdir $SCRATCH_MNT/test

# create the test file again and remove it from upperdir directly, make the
# upper dentry become stale
touch $SCRATCH_MNT/test
rm $upperdir/test
# try to remove test file from overlay dir, trigger ovl_remove_and_whiteout, it
# should see stale file handle error, and no warnings/oops are expected.
rm $SCRATCH_MNT/test 2>&1 | _filter_scratch

# success, all done
status=0
exit