#!/bin/bash
#
# Copyright(c) 2012-2019 Intel Corporation
# SPDX-License-Identifier: BSD-3-Clause-Clear
#

. `dirname $0`/conf_framework

check() {
	if compile_module "blk_queue_write_cache(NULL, 0, 0)" "linux/blkdev.h"
	then
		echo "1"
	elif compile_module "struct request_queue rq;rq.flush_flags" "linux/blkdev.h"
	then
		echo "2"
    else
        echo "X"
    fi
}

apply() {
    case "$1" in
    "1")
		add_define "CAS_CHECK_QUEUE_FLUSH(q) \\
			test_bit(QUEUE_FLAG_WC, &(q)->queue_flags)"
		add_define "CAS_CHECK_QUEUE_FUA(q) \\
			test_bit(QUEUE_FLAG_FUA, &(q)->queue_flags)"
		add_function "
	static inline void cas_set_queue_flush_fua(struct request_queue *q,
			bool flush, bool fua)
	{
		blk_queue_write_cache(q, flush, fua);
	}" ;;
    "2")
		add_define "CAS_CHECK_QUEUE_FLUSH(q) \\
			((q)->flush_flags & CAS_REQ_FLUSH)"
		add_define "CAS_CHECK_QUEUE_FUA(q) \\
			((q)->flush_flags & REQ_FUA)"
		add_function "static inline void cas_set_queue_flush_fua(struct request_queue *q,
				bool flush, bool fua)
	{
		unsigned int flags = 0;
		if (flush)
			flags |= CAS_REQ_FLUSH;
		if (fua)
			flags |= REQ_FUA;
		if (flags)
			blk_queue_flush(q, flags);
	}" ;;
    *)
        exit 1
    esac
}

conf_run $@