#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2023 Red Hat, Inc.  All Rights Reserved.
#
# FS QA Test No. 729
#
# Trigger page faults in the same file during read and write
#
# This is generic/647 with an additional test that writes a memory-mapped page
# onto itself using direct I/O.
#
# The kernel will invalidate the page cache before carrying out the write, so
# filesystems that fault in the page and then carry out the direct I/O write
# with page faults disabled will never make any progress.
#
. ./common/preamble
_begin_fstest auto quick

# Override the default cleanup function.
_cleanup()
{
	cd /
	rm -f $tmp.*
	rm -f $TEST_DIR/mmap-rw-fault.tmp
}

# Import common functions.
. ./common/filter

# real QA test starts here

_supported_fs generic
_require_test
_require_odirect
_require_test_program mmap-rw-fault

[ $FSTYP = "bcachefs" ] && _notrun "not supported on bcachefs - bcachefs doesn't allow O_DIRECT with buffer mapped from same file"

echo "Silence is golden"

$here/src/mmap-rw-fault -2 $TEST_DIR/mmap-rw-fault.tmp

status=$?
exit