#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2017 Red Hat Inc.  All Rights Reserved.
#
# FS QA Test 260
#
# 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 xfs
_supported_os Linux
_require_scratch_dax
_require_test_program "feature"
_require_test_program "t_mmap_dio"
_require_xfs_io_command "chattr" "+/-x"
_require_xfs_io_command "falloc"

prep_files()
{
	rm -f $SCRATCH_MNT/tf_{s,d}

	$XFS_IO_PROG -f -c "falloc 0 $tsize" \
		$SCRATCH_MNT/tf_{s,d} >> $seqres.full 2>&1
}

t_both_dax()
{
	prep_files
	$XFS_IO_PROG -c "chattr +x" $SCRATCH_MNT/tf_{s,d}
	# with O_DIRECT first
	src/t_mmap_dio $SCRATCH_MNT/tf_{s,d} $1 "dio both dax"

	prep_files
	$XFS_IO_PROG -c "chattr +x" $SCRATCH_MNT/tf_{s,d}
	# again with buffered IO
	src/t_mmap_dio -b $SCRATCH_MNT/tf_{s,d} \
		$1 "buffered both dax"
}

t_nondax_to_dax()
{
	prep_files
	$XFS_IO_PROG -c "chattr -x" $SCRATCH_MNT/tf_s
	$XFS_IO_PROG -c "chattr +x" $SCRATCH_MNT/tf_d
	src/t_mmap_dio $SCRATCH_MNT/tf_{s,d} \
		$1 "dio nondax to dax"

	prep_files
	$XFS_IO_PROG -c "chattr -x" $SCRATCH_MNT/tf_s
	$XFS_IO_PROG -c "chattr +x" $SCRATCH_MNT/tf_d
	src/t_mmap_dio -b $SCRATCH_MNT/tf_{s,d} \
		$1 "buffered nondax to dax"
}

t_dax_to_nondax()
{
	prep_files
	$XFS_IO_PROG -c "chattr +x" $SCRATCH_MNT/tf_s
	$XFS_IO_PROG -c "chattr -x" $SCRATCH_MNT/tf_d
	src/t_mmap_dio $SCRATCH_MNT/tf_{s,d} \
		$1 "dio dax to nondax"

	prep_files
	$XFS_IO_PROG -c "chattr +x" $SCRATCH_MNT/tf_s
	$XFS_IO_PROG -c "chattr -x" $SCRATCH_MNT/tf_d
	src/t_mmap_dio -b $SCRATCH_MNT/tf_{s,d} \
		$1 "buffered dax to nondax"
}

t_both_nondax()
{
	prep_files
	$XFS_IO_PROG -c "chattr -x" $SCRATCH_MNT/tf_{s,d}
	src/t_mmap_dio $SCRATCH_MNT/tf_{s,d} \
		$1 "dio both nondax"

	prep_files
	$XFS_IO_PROG -c "chattr -x" $SCRATCH_MNT/tf_{s,d}
	src/t_mmap_dio -b $SCRATCH_MNT/tf_{s,d} \
		$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()
{
	# less than page size
	t_dax_flag_mmap_dio 1024
	# page size
	t_dax_flag_mmap_dio `src/feature -s`
	# bigger sizes, for PMD faults
	t_dax_flag_mmap_dio $((16 * 1024 * 1024))
	t_dax_flag_mmap_dio $((64 * 1024 * 1024))
}

# make xfs 2Mb aligned for PMD fault testing
_scratch_mkfs "-d su=2m,sw=1" > /dev/null 2>&1

# mount with dax option
_scratch_mount "-o dax"

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

do_tests
_scratch_unmount

# mount again without dax option
export MOUNT_OPTIONS=""
_scratch_mount
do_tests

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