#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2017 Red Hat Inc.  All Rights Reserved.
#
# FS QA Test 605
#
# Test per-inode DAX flag by mmap direct/buffered IO.
#
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

_supported_fs generic
_require_scratch_dax_mountopt "dax=always"
_require_test_program "feature"
_require_test_program "t_mmap_dio"
_require_dax_iflag
_require_xfs_io_command "falloc"

SRC_DIR=$SCRATCH_MNT/src
SRC_FILE=$SRC_DIR/tf_s
DST_DIR=$SCRATCH_MNT/dst
DST_FILE=$DST_DIR/tf_d

prep_directories()
{
	mkdir -p $SRC_DIR $DST_DIR
}

prep_files()
{
	rm -f $SRC_FILE $DST_FILE
	$XFS_IO_PROG -f -c "falloc 0 $tsize" \
		$SRC_FILE $DST_FILE >> $seqres.full 2>&1
}

t_both_dax()
{
	$XFS_IO_PROG -c "chattr +x" $SRC_DIR $DST_DIR
	prep_files
	# with O_DIRECT first
	$here/src/t_mmap_dio $SRC_FILE $DST_FILE \
		$1 "dio both dax"

	prep_files
	# again with buffered IO
	$here/src/t_mmap_dio -b $SRC_FILE $DST_FILE \
		$1 "buffered both dax"
}

t_nondax_to_dax()
{
	$XFS_IO_PROG -c "chattr -x" $SRC_DIR
	$XFS_IO_PROG -c "chattr +x" $DST_DIR
	prep_files
	$here/src/t_mmap_dio $SRC_FILE $DST_FILE \
		$1 "dio nondax to dax"

	prep_files
	$here/src/t_mmap_dio -b $SRC_FILE $DST_FILE \
		$1 "buffered nondax to dax"
}

t_dax_to_nondax()
{
	$XFS_IO_PROG -c "chattr +x" $SRC_DIR
	$XFS_IO_PROG -c "chattr -x" $DST_DIR
	prep_files
	$here/src/t_mmap_dio $SRC_FILE $DST_FILE \
		$1 "dio dax to nondax"

	prep_files
	$here/src/t_mmap_dio -b $SRC_FILE $DST_FILE \
		$1 "buffered dax to nondax"
}

t_both_nondax()
{
	$XFS_IO_PROG -c "chattr -x" $SRC_DIR $DST_DIR
	prep_files
	$here/src/t_mmap_dio $SRC_FILE $DST_FILE \
		$1 "dio both nondax"

	prep_files
	$here/src/t_mmap_dio -b $SRC_FILE $DST_FILE \
		$1 "buffered both nondax"
}

# $1 mmap read/write size
t_dax_flag_mmap_dio()
{
	t_both_dax $1
	t_dax_to_nondax $1
	t_nondax_to_dax $1
	t_both_nondax $1
}

do_tests()
{
	local mount_option=$1

	_scratch_mount "$mount_option"

	prep_directories
	# less than page size
	t_dax_flag_mmap_dio 1024
	# page size
	t_dax_flag_mmap_dio `$here/src/feature -s`
	# bigger sizes, for PMD faults
	t_dax_flag_mmap_dio $((16 * 1024 * 1024))
	t_dax_flag_mmap_dio $((64 * 1024 * 1024))

	_scratch_unmount
}

# make xfs aligned for PMD fault testing
_scratch_mkfs_geom $(_get_hugepagesize) 1 >> $seqres.full 2>&1

tsize=$((128 * 1024 * 1024))

# mount with dax=inode option
do_tests "-o dax=inode"

# mount without dax option
export MOUNT_OPTIONS=""
do_tests

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