rdma_transport.c | Explore in Territory

/*
 * Copyright (c) 2009, 2018 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/module.h>
#include <rdma/rdma_cm.h>

#include "rds_single_path.h"
#include "rdma_transport.h"
#include "ib.h"

/* Global IPv4 and IPv6 RDS RDMA listener cm_id */
static struct rdma_cm_id *rds_rdma_listen_id;
#if IS_ENABLED(CONFIG_IPV6)
static struct rdma_cm_id *rds6_rdma_listen_id;
#endif

/* Per IB specification 7.7.3, service level is a 4-bit field. */
#define TOS_TO_SL(tos) …

static int rds_rdma_cm_event_handler_cmn(struct rdma_cm_id *cm_id,
					 struct rdma_cm_event *event,
					 bool isv6)
{ … }

int rds_rdma_cm_event_handler(struct rdma_cm_id *cm_id,
			      struct rdma_cm_event *event)
{ … }

#if IS_ENABLED(CONFIG_IPV6)
int rds6_rdma_cm_event_handler(struct rdma_cm_id *cm_id,
			       struct rdma_cm_event *event)
{ … }
#endif

static int rds_rdma_listen_init_common(rdma_cm_event_handler handler,
				       struct sockaddr *sa,
				       struct rdma_cm_id **ret_cm_id)
{ … }

/* Initialize the RDS RDMA listeners.  We create two listeners for
 * compatibility reason.  The one on RDS_PORT is used for IPv4
 * requests only.  The one on RDS_CM_PORT is used for IPv6 requests
 * only.  So only IPv6 enabled RDS module will communicate using this
 * port.
 */
static int rds_rdma_listen_init(void)
{ … }

static void rds_rdma_listen_stop(void)
{ … }

static int __init rds_rdma_init(void)
{ … }
module_init(…) …;

static void __exit rds_rdma_exit(void)
{ … }
module_exit(rds_rdma_exit);

MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;
linux/net/rds/rdma_transport.c
