/*
 * GPL HEADER START
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 only,
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License version 2 for more details (a copy is included
 * in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU General Public License
 * version 2 along with this program; If not, see
 * http://www.gnu.org/licenses/gpl-2.0.html
 *
 * GPL HEADER END
 */
/*
 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
 * Use is subject to license terms.
 *
 * Copyright (c) 2017, Intel Corporation.
 */
/*
 * This file is part of Lustre, http://www.lustre.org/
 * Lustre is a trademark of Sun Microsystems, Inc.
 */

#define DEBUG_SUBSYSTEM S_LNET
#include <lnet/lib-lnet.h>

static int
lolnd_send(struct lnet_ni *ni, void *private, struct lnet_msg *lntmsg)
{
	LASSERT(!lntmsg->msg_routing);
	LASSERT(!lntmsg->msg_target_is_router);

	return lnet_parse(ni, &lntmsg->msg_hdr, ni->ni_nid, lntmsg, 0);
}

static int
lolnd_recv(struct lnet_ni *ni, void *private, struct lnet_msg *lntmsg,
	   int delayed, unsigned int niov,
	   struct kvec *iov, lnet_kiov_t *kiov,
	   unsigned int offset, unsigned int mlen, unsigned int rlen)
{
	struct lnet_msg *sendmsg = private;

	if (lntmsg != NULL) {			/* not discarding */
		if (sendmsg->msg_iov != NULL) {
			if (iov != NULL)
				lnet_copy_iov2iov(niov, iov, offset,
						  sendmsg->msg_niov,
						  sendmsg->msg_iov,
						  sendmsg->msg_offset, mlen);
			else
				lnet_copy_iov2kiov(niov, kiov, offset,
						   sendmsg->msg_niov,
						   sendmsg->msg_iov,
						   sendmsg->msg_offset, mlen);
		} else {
			if (iov != NULL)
				lnet_copy_kiov2iov(niov, iov, offset,
						   sendmsg->msg_niov,
						   sendmsg->msg_kiov,
						   sendmsg->msg_offset, mlen);
			else
				lnet_copy_kiov2kiov(niov, kiov, offset,
						    sendmsg->msg_niov,
						    sendmsg->msg_kiov,
						    sendmsg->msg_offset, mlen);
		}

		lnet_finalize(lntmsg, 0);
	}

	lnet_finalize(sendmsg, 0);
	return 0;
}

static int lolnd_instanced;

static void
lolnd_shutdown(struct lnet_ni *ni)
{
	CDEBUG (D_NET, "shutdown\n");
	LASSERT(lolnd_instanced);

	lolnd_instanced = 0;
}

static int
lolnd_startup(struct lnet_ni *ni)
{
	LASSERT (ni->ni_net->net_lnd == &the_lolnd);
	LASSERT (!lolnd_instanced);
	lolnd_instanced = 1;

	return (0);
}

struct lnet_lnd the_lolnd = {
	.lnd_list	= {
				.next = &the_lolnd.lnd_list,
				.prev = &the_lolnd.lnd_list
			},
	.lnd_type	= LOLND,
	.lnd_startup	= lolnd_startup,
	.lnd_shutdown	= lolnd_shutdown,
	.lnd_send	= lolnd_send,
	.lnd_recv	= lolnd_recv
};