linux/net/rds/transport.c

/*
 * Copyright (c) 2006, 2017 Oracle and/or its affiliates. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 */
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/in.h>
#include <linux/ipv6.h>

#include "rds.h"
#include "loop.h"

static char * const rds_trans_modules[] = …;

static struct rds_transport *transports[RDS_TRANS_COUNT];
static DECLARE_RWSEM(rds_trans_sem);

void rds_trans_register(struct rds_transport *trans)
{ … }
EXPORT_SYMBOL_GPL(…);

void rds_trans_unregister(struct rds_transport *trans)
{ … }
EXPORT_SYMBOL_GPL(…);

void rds_trans_put(struct rds_transport *trans)
{ … }

struct rds_transport *rds_trans_get_preferred(struct net *net,
					      const struct in6_addr *addr,
					      __u32 scope_id)
{ … }

struct rds_transport *rds_trans_get(int t_type)
{ … }

/*
 * This returns the number of stats entries in the snapshot and only
 * copies them using the iter if there is enough space for them.  The
 * caller passes in the global stats so that we can size and copy while
 * holding the lock.
 */
unsigned int rds_trans_stats_info_copy(struct rds_info_iterator *iter,
				       unsigned int avail)

{ … }