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1/*
2 * Copyright (c) 2006, 2019 Oracle and/or its affiliates. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 *
32 */
33#include <linux/kernel.h>
34#include <linux/in.h>
35#include <linux/if.h>
36#include <linux/netdevice.h>
37#include <linux/inetdevice.h>
38#include <linux/if_arp.h>
39#include <linux/delay.h>
40#include <linux/slab.h>
41#include <linux/module.h>
42#include <net/addrconf.h>
43
44#include "rds_single_path.h"
45#include "rds.h"
46#include "ib.h"
47#include "ib_mr.h"
48
49static unsigned int rds_ib_mr_1m_pool_size = RDS_MR_1M_POOL_SIZE;
50static unsigned int rds_ib_mr_8k_pool_size = RDS_MR_8K_POOL_SIZE;
51unsigned int rds_ib_retry_count = RDS_IB_DEFAULT_RETRY_COUNT;
52static atomic_t rds_ib_unloading;
53
54module_param(rds_ib_mr_1m_pool_size, int, 0444);
55MODULE_PARM_DESC(rds_ib_mr_1m_pool_size, " Max number of 1M mr per HCA");
56module_param(rds_ib_mr_8k_pool_size, int, 0444);
57MODULE_PARM_DESC(rds_ib_mr_8k_pool_size, " Max number of 8K mr per HCA");
58module_param(rds_ib_retry_count, int, 0444);
59MODULE_PARM_DESC(rds_ib_retry_count, " Number of hw retries before reporting an error");
60
61/*
62 * we have a clumsy combination of RCU and a rwsem protecting this list
63 * because it is used both in the get_mr fast path and while blocking in
64 * the FMR flushing path.
65 */
66DECLARE_RWSEM(rds_ib_devices_lock);
67struct list_head rds_ib_devices;
68
69/* NOTE: if also grabbing ibdev lock, grab this first */
70DEFINE_SPINLOCK(ib_nodev_conns_lock);
71LIST_HEAD(ib_nodev_conns);
72
73static void rds_ib_nodev_connect(void)
74{
75 struct rds_ib_connection *ic;
76
77 spin_lock(&ib_nodev_conns_lock);
78 list_for_each_entry(ic, &ib_nodev_conns, ib_node)
79 rds_conn_connect_if_down(ic->conn);
80 spin_unlock(&ib_nodev_conns_lock);
81}
82
83static void rds_ib_dev_shutdown(struct rds_ib_device *rds_ibdev)
84{
85 struct rds_ib_connection *ic;
86 unsigned long flags;
87
88 spin_lock_irqsave(&rds_ibdev->spinlock, flags);
89 list_for_each_entry(ic, &rds_ibdev->conn_list, ib_node)
90 rds_conn_path_drop(&ic->conn->c_path[0], true);
91 spin_unlock_irqrestore(&rds_ibdev->spinlock, flags);
92}
93
94/*
95 * rds_ib_destroy_mr_pool() blocks on a few things and mrs drop references
96 * from interrupt context so we push freing off into a work struct in krdsd.
97 */
98static void rds_ib_dev_free(struct work_struct *work)
99{
100 struct rds_ib_ipaddr *i_ipaddr, *i_next;
101 struct rds_ib_device *rds_ibdev = container_of(work,
102 struct rds_ib_device, free_work);
103
104 if (rds_ibdev->mr_8k_pool)
105 rds_ib_destroy_mr_pool(rds_ibdev->mr_8k_pool);
106 if (rds_ibdev->mr_1m_pool)
107 rds_ib_destroy_mr_pool(rds_ibdev->mr_1m_pool);
108 if (rds_ibdev->pd)
109 ib_dealloc_pd(rds_ibdev->pd);
110
111 list_for_each_entry_safe(i_ipaddr, i_next, &rds_ibdev->ipaddr_list, list) {
112 list_del(&i_ipaddr->list);
113 kfree(i_ipaddr);
114 }
115
116 kfree(rds_ibdev->vector_load);
117
118 kfree(rds_ibdev);
119}
120
121void rds_ib_dev_put(struct rds_ib_device *rds_ibdev)
122{
123 BUG_ON(refcount_read(&rds_ibdev->refcount) == 0);
124 if (refcount_dec_and_test(&rds_ibdev->refcount))
125 queue_work(rds_wq, &rds_ibdev->free_work);
126}
127
128static int rds_ib_add_one(struct ib_device *device)
129{
130 struct rds_ib_device *rds_ibdev;
131 int ret;
132
133 /* Only handle IB (no iWARP) devices */
134 if (device->node_type != RDMA_NODE_IB_CA)
135 return -EOPNOTSUPP;
136
137 /* Device must support FRWR */
138 if (!(device->attrs.device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS))
139 return -EOPNOTSUPP;
140
141 rds_ibdev = kzalloc_node(sizeof(struct rds_ib_device), GFP_KERNEL,
142 ibdev_to_node(device));
143 if (!rds_ibdev)
144 return -ENOMEM;
145
146 spin_lock_init(&rds_ibdev->spinlock);
147 refcount_set(&rds_ibdev->refcount, 1);
148 INIT_WORK(&rds_ibdev->free_work, rds_ib_dev_free);
149
150 INIT_LIST_HEAD(&rds_ibdev->ipaddr_list);
151 INIT_LIST_HEAD(&rds_ibdev->conn_list);
152
153 rds_ibdev->max_wrs = device->attrs.max_qp_wr;
154 rds_ibdev->max_sge = min(device->attrs.max_send_sge, RDS_IB_MAX_SGE);
155
156 rds_ibdev->odp_capable =
157 !!(device->attrs.kernel_cap_flags &
158 IBK_ON_DEMAND_PAGING) &&
159 !!(device->attrs.odp_caps.per_transport_caps.rc_odp_caps &
160 IB_ODP_SUPPORT_WRITE) &&
161 !!(device->attrs.odp_caps.per_transport_caps.rc_odp_caps &
162 IB_ODP_SUPPORT_READ);
163
164 rds_ibdev->max_1m_mrs = device->attrs.max_mr ?
165 min(device->attrs.max_mr / 2,
166 rds_ib_mr_1m_pool_size) : rds_ib_mr_1m_pool_size;
167
168 rds_ibdev->max_8k_mrs = device->attrs.max_mr ?
169 min((device->attrs.max_mr / 2) * RDS_MR_8K_SCALE,
170 rds_ib_mr_8k_pool_size) : rds_ib_mr_8k_pool_size;
171
172 rds_ibdev->max_initiator_depth = device->attrs.max_qp_init_rd_atom;
173 rds_ibdev->max_responder_resources = device->attrs.max_qp_rd_atom;
174
175 rds_ibdev->vector_load = kzalloc_objs(int, device->num_comp_vectors);
176 if (!rds_ibdev->vector_load) {
177 pr_err("RDS/IB: %s failed to allocate vector memory\n",
178 __func__);
179 ret = -ENOMEM;
180 goto put_dev;
181 }
182
183 rds_ibdev->dev = device;
184 rds_ibdev->pd = ib_alloc_pd(device, 0);
185 if (IS_ERR(rds_ibdev->pd)) {
186 ret = PTR_ERR(rds_ibdev->pd);
187 rds_ibdev->pd = NULL;
188 goto put_dev;
189 }
190
191 rds_ibdev->mr_1m_pool =
192 rds_ib_create_mr_pool(rds_ibdev, RDS_IB_MR_1M_POOL);
193 if (IS_ERR(rds_ibdev->mr_1m_pool)) {
194 ret = PTR_ERR(rds_ibdev->mr_1m_pool);
195 rds_ibdev->mr_1m_pool = NULL;
196 goto put_dev;
197 }
198
199 rds_ibdev->mr_8k_pool =
200 rds_ib_create_mr_pool(rds_ibdev, RDS_IB_MR_8K_POOL);
201 if (IS_ERR(rds_ibdev->mr_8k_pool)) {
202 ret = PTR_ERR(rds_ibdev->mr_8k_pool);
203 rds_ibdev->mr_8k_pool = NULL;
204 goto put_dev;
205 }
206
207 rdsdebug("RDS/IB: max_mr = %u, max_wrs = %d, max_sge = %d, max_1m_mrs = %d, max_8k_mrs = %d\n",
208 device->attrs.max_mr, rds_ibdev->max_wrs, rds_ibdev->max_sge,
209 rds_ibdev->max_1m_mrs, rds_ibdev->max_8k_mrs);
210
211 pr_info("RDS/IB: %s: added\n", device->name);
212
213 down_write(&rds_ib_devices_lock);
214 list_add_tail_rcu(&rds_ibdev->list, &rds_ib_devices);
215 up_write(&rds_ib_devices_lock);
216 refcount_inc(&rds_ibdev->refcount);
217
218 ib_set_client_data(device, &rds_ib_client, rds_ibdev);
219
220 rds_ib_nodev_connect();
221 return 0;
222
223put_dev:
224 rds_ib_dev_put(rds_ibdev);
225 return ret;
226}
227
228/*
229 * New connections use this to find the device to associate with the
230 * connection. It's not in the fast path so we're not concerned about the
231 * performance of the IB call. (As of this writing, it uses an interrupt
232 * blocking spinlock to serialize walking a per-device list of all registered
233 * clients.)
234 *
235 * RCU is used to handle incoming connections racing with device teardown.
236 * Rather than use a lock to serialize removal from the client_data and
237 * getting a new reference, we use an RCU grace period. The destruction
238 * path removes the device from client_data and then waits for all RCU
239 * readers to finish.
240 *
241 * A new connection can get NULL from this if its arriving on a
242 * device that is in the process of being removed.
243 */
244struct rds_ib_device *rds_ib_get_client_data(struct ib_device *device)
245{
246 struct rds_ib_device *rds_ibdev;
247
248 rcu_read_lock();
249 rds_ibdev = ib_get_client_data(device, &rds_ib_client);
250 if (rds_ibdev)
251 refcount_inc(&rds_ibdev->refcount);
252 rcu_read_unlock();
253 return rds_ibdev;
254}
255
256/*
257 * The IB stack is letting us know that a device is going away. This can
258 * happen if the underlying HCA driver is removed or if PCI hotplug is removing
259 * the pci function, for example.
260 *
261 * This can be called at any time and can be racing with any other RDS path.
262 */
263static void rds_ib_remove_one(struct ib_device *device, void *client_data)
264{
265 struct rds_ib_device *rds_ibdev = client_data;
266
267 rds_ib_dev_shutdown(rds_ibdev);
268
269 /* stop connection attempts from getting a reference to this device. */
270 ib_set_client_data(device, &rds_ib_client, NULL);
271
272 down_write(&rds_ib_devices_lock);
273 list_del_rcu(&rds_ibdev->list);
274 up_write(&rds_ib_devices_lock);
275
276 /*
277 * This synchronize rcu is waiting for readers of both the ib
278 * client data and the devices list to finish before we drop
279 * both of those references.
280 */
281 synchronize_rcu();
282 rds_ib_dev_put(rds_ibdev);
283 rds_ib_dev_put(rds_ibdev);
284}
285
286struct ib_client rds_ib_client = {
287 .name = "rds_ib",
288 .add = rds_ib_add_one,
289 .remove = rds_ib_remove_one
290};
291
292static int rds_ib_conn_info_visitor(struct rds_connection *conn,
293 void *buffer)
294{
295 struct rds_info_rdma_connection *iinfo = buffer;
296 struct rds_ib_connection *ic = conn->c_transport_data;
297
298 /* We will only ever look at IB transports */
299 if (conn->c_trans != &rds_ib_transport)
300 return 0;
301 if (conn->c_isv6)
302 return 0;
303
304 iinfo->src_addr = conn->c_laddr.s6_addr32[3];
305 iinfo->dst_addr = conn->c_faddr.s6_addr32[3];
306 if (ic) {
307 iinfo->tos = conn->c_tos;
308 iinfo->sl = ic->i_sl;
309 }
310
311 memset(&iinfo->src_gid, 0, sizeof(iinfo->src_gid));
312 memset(&iinfo->dst_gid, 0, sizeof(iinfo->dst_gid));
313 if (rds_conn_state(conn) == RDS_CONN_UP) {
314 struct rds_ib_device *rds_ibdev;
315
316 rdma_read_gids(ic->i_cm_id, (union ib_gid *)&iinfo->src_gid,
317 (union ib_gid *)&iinfo->dst_gid);
318
319 rds_ibdev = ic->rds_ibdev;
320 iinfo->max_send_wr = ic->i_send_ring.w_nr;
321 iinfo->max_recv_wr = ic->i_recv_ring.w_nr;
322 iinfo->max_send_sge = rds_ibdev->max_sge;
323 rds_ib_get_mr_info(rds_ibdev, iinfo);
324 iinfo->cache_allocs = atomic_read(&ic->i_cache_allocs);
325 }
326 return 1;
327}
328
329#if IS_ENABLED(CONFIG_IPV6)
330/* IPv6 version of rds_ib_conn_info_visitor(). */
331static int rds6_ib_conn_info_visitor(struct rds_connection *conn,
332 void *buffer)
333{
334 struct rds6_info_rdma_connection *iinfo6 = buffer;
335 struct rds_ib_connection *ic = conn->c_transport_data;
336
337 /* We will only ever look at IB transports */
338 if (conn->c_trans != &rds_ib_transport)
339 return 0;
340
341 iinfo6->src_addr = conn->c_laddr;
342 iinfo6->dst_addr = conn->c_faddr;
343 if (ic) {
344 iinfo6->tos = conn->c_tos;
345 iinfo6->sl = ic->i_sl;
346 }
347
348 memset(&iinfo6->src_gid, 0, sizeof(iinfo6->src_gid));
349 memset(&iinfo6->dst_gid, 0, sizeof(iinfo6->dst_gid));
350
351 if (rds_conn_state(conn) == RDS_CONN_UP) {
352 struct rds_ib_device *rds_ibdev;
353
354 rdma_read_gids(ic->i_cm_id, (union ib_gid *)&iinfo6->src_gid,
355 (union ib_gid *)&iinfo6->dst_gid);
356 rds_ibdev = ic->rds_ibdev;
357 iinfo6->max_send_wr = ic->i_send_ring.w_nr;
358 iinfo6->max_recv_wr = ic->i_recv_ring.w_nr;
359 iinfo6->max_send_sge = rds_ibdev->max_sge;
360 rds6_ib_get_mr_info(rds_ibdev, iinfo6);
361 iinfo6->cache_allocs = atomic_read(&ic->i_cache_allocs);
362 }
363 return 1;
364}
365#endif
366
367static void rds_ib_ic_info(struct socket *sock, unsigned int len,
368 struct rds_info_iterator *iter,
369 struct rds_info_lengths *lens)
370{
371 u64 buffer[(sizeof(struct rds_info_rdma_connection) + 7) / 8];
372
373 rds_for_each_conn_info(sock, len, iter, lens,
374 rds_ib_conn_info_visitor,
375 buffer,
376 sizeof(struct rds_info_rdma_connection));
377}
378
379#if IS_ENABLED(CONFIG_IPV6)
380/* IPv6 version of rds_ib_ic_info(). */
381static void rds6_ib_ic_info(struct socket *sock, unsigned int len,
382 struct rds_info_iterator *iter,
383 struct rds_info_lengths *lens)
384{
385 u64 buffer[(sizeof(struct rds6_info_rdma_connection) + 7) / 8];
386
387 rds_for_each_conn_info(sock, len, iter, lens,
388 rds6_ib_conn_info_visitor,
389 buffer,
390 sizeof(struct rds6_info_rdma_connection));
391}
392#endif
393
394/*
395 * Early RDS/IB was built to only bind to an address if there is an IPoIB
396 * device with that address set.
397 *
398 * If it were me, I'd advocate for something more flexible. Sending and
399 * receiving should be device-agnostic. Transports would try and maintain
400 * connections between peers who have messages queued. Userspace would be
401 * allowed to influence which paths have priority. We could call userspace
402 * asserting this policy "routing".
403 */
404static int rds_ib_laddr_check_cm(struct net *net, const struct in6_addr *addr,
405 __u32 scope_id)
406{
407 int ret;
408 struct rdma_cm_id *cm_id;
409#if IS_ENABLED(CONFIG_IPV6)
410 struct sockaddr_in6 sin6;
411#endif
412 struct sockaddr_in sin;
413 struct sockaddr *sa;
414 bool isv4;
415
416 isv4 = ipv6_addr_v4mapped(addr);
417 /* Create a CMA ID and try to bind it. This catches both
418 * IB and iWARP capable NICs.
419 */
420 cm_id = rdma_create_id(&init_net, rds_rdma_cm_event_handler,
421 NULL, RDMA_PS_TCP, IB_QPT_RC);
422 if (IS_ERR(cm_id))
423 return PTR_ERR(cm_id);
424
425 if (isv4) {
426 memset(&sin, 0, sizeof(sin));
427 sin.sin_family = AF_INET;
428 sin.sin_addr.s_addr = addr->s6_addr32[3];
429 sa = (struct sockaddr *)&sin;
430 } else {
431#if IS_ENABLED(CONFIG_IPV6)
432 if (!ipv6_mod_enabled()) {
433 ret = -EADDRNOTAVAIL;
434 goto out;
435 }
436 memset(&sin6, 0, sizeof(sin6));
437 sin6.sin6_family = AF_INET6;
438 sin6.sin6_addr = *addr;
439 sin6.sin6_scope_id = scope_id;
440 sa = (struct sockaddr *)&sin6;
441
442 /* XXX Do a special IPv6 link local address check here. The
443 * reason is that rdma_bind_addr() always succeeds with IPv6
444 * link local address regardless it is indeed configured in a
445 * system.
446 */
447 if (ipv6_addr_type(addr) & IPV6_ADDR_LINKLOCAL) {
448 struct net_device *dev;
449
450 if (scope_id == 0) {
451 ret = -EADDRNOTAVAIL;
452 goto out;
453 }
454
455 /* Use init_net for now as RDS is not network
456 * name space aware.
457 */
458 dev = dev_get_by_index(&init_net, scope_id);
459 if (!dev) {
460 ret = -EADDRNOTAVAIL;
461 goto out;
462 }
463 if (!ipv6_chk_addr(&init_net, addr, dev, 1)) {
464 dev_put(dev);
465 ret = -EADDRNOTAVAIL;
466 goto out;
467 }
468 dev_put(dev);
469 }
470#else
471 ret = -EADDRNOTAVAIL;
472 goto out;
473#endif
474 }
475
476 /* rdma_bind_addr will only succeed for IB & iWARP devices */
477 ret = rdma_bind_addr(cm_id, sa);
478 /* due to this, we will claim to support iWARP devices unless we
479 check node_type. */
480 if (ret || !cm_id->device ||
481 cm_id->device->node_type != RDMA_NODE_IB_CA)
482 ret = -EADDRNOTAVAIL;
483
484 rdsdebug("addr %pI6c%%%u ret %d node type %d\n",
485 addr, scope_id, ret,
486 cm_id->device ? cm_id->device->node_type : -1);
487
488out:
489 rdma_destroy_id(cm_id);
490
491 return ret;
492}
493
494static int rds_ib_laddr_check(struct net *net, const struct in6_addr *addr,
495 __u32 scope_id)
496{
497 struct rds_ib_device *rds_ibdev = NULL;
498
499 /* RDS/IB is restricted to the initial network namespace */
500 if (!net_eq(net, &init_net))
501 return -EPROTOTYPE;
502
503 if (ipv6_addr_v4mapped(addr)) {
504 rds_ibdev = rds_ib_get_device(addr->s6_addr32[3]);
505 if (rds_ibdev) {
506 rds_ib_dev_put(rds_ibdev);
507 return 0;
508 }
509 }
510
511 return rds_ib_laddr_check_cm(net, addr, scope_id);
512}
513
514static void rds_ib_unregister_client(void)
515{
516 ib_unregister_client(&rds_ib_client);
517 /* wait for rds_ib_dev_free() to complete */
518 flush_workqueue(rds_wq);
519}
520
521static void rds_ib_set_unloading(void)
522{
523 atomic_set(&rds_ib_unloading, 1);
524}
525
526static bool rds_ib_is_unloading(struct rds_connection *conn)
527{
528 struct rds_conn_path *cp = &conn->c_path[0];
529
530 return (test_bit(RDS_DESTROY_PENDING, &cp->cp_flags) ||
531 atomic_read(&rds_ib_unloading) != 0);
532}
533
534void rds_ib_exit(void)
535{
536 rds_ib_set_unloading();
537 synchronize_rcu();
538 rds_info_deregister_func(RDS_INFO_IB_CONNECTIONS, rds_ib_ic_info);
539#if IS_ENABLED(CONFIG_IPV6)
540 rds_info_deregister_func(RDS6_INFO_IB_CONNECTIONS, rds6_ib_ic_info);
541#endif
542 rds_ib_unregister_client();
543 rds_ib_destroy_nodev_conns();
544 rds_ib_sysctl_exit();
545 rds_ib_recv_exit();
546 rds_trans_unregister(&rds_ib_transport);
547 rds_ib_mr_exit();
548}
549
550static u8 rds_ib_get_tos_map(u8 tos)
551{
552 /* 1:1 user to transport map for RDMA transport.
553 * In future, if custom map is desired, hook can export
554 * user configurable map.
555 */
556 return tos;
557}
558
559struct rds_transport rds_ib_transport = {
560 .laddr_check = rds_ib_laddr_check,
561 .xmit_path_complete = rds_ib_xmit_path_complete,
562 .xmit = rds_ib_xmit,
563 .xmit_rdma = rds_ib_xmit_rdma,
564 .xmit_atomic = rds_ib_xmit_atomic,
565 .recv_path = rds_ib_recv_path,
566 .conn_alloc = rds_ib_conn_alloc,
567 .conn_free = rds_ib_conn_free,
568 .conn_path_connect = rds_ib_conn_path_connect,
569 .conn_path_shutdown = rds_ib_conn_path_shutdown,
570 .inc_copy_to_user = rds_ib_inc_copy_to_user,
571 .inc_free = rds_ib_inc_free,
572 .cm_initiate_connect = rds_ib_cm_initiate_connect,
573 .cm_handle_connect = rds_ib_cm_handle_connect,
574 .cm_connect_complete = rds_ib_cm_connect_complete,
575 .stats_info_copy = rds_ib_stats_info_copy,
576 .exit = rds_ib_exit,
577 .get_mr = rds_ib_get_mr,
578 .sync_mr = rds_ib_sync_mr,
579 .free_mr = rds_ib_free_mr,
580 .flush_mrs = rds_ib_flush_mrs,
581 .get_tos_map = rds_ib_get_tos_map,
582 .t_owner = THIS_MODULE,
583 .t_name = "infiniband",
584 .t_unloading = rds_ib_is_unloading,
585 .t_type = RDS_TRANS_IB
586};
587
588int rds_ib_init(void)
589{
590 int ret;
591
592 INIT_LIST_HEAD(&rds_ib_devices);
593
594 ret = rds_ib_mr_init();
595 if (ret)
596 goto out;
597
598 ret = ib_register_client(&rds_ib_client);
599 if (ret)
600 goto out_mr_exit;
601
602 ret = rds_ib_sysctl_init();
603 if (ret)
604 goto out_ibreg;
605
606 ret = rds_ib_recv_init();
607 if (ret)
608 goto out_sysctl;
609
610 rds_trans_register(&rds_ib_transport);
611
612 rds_info_register_func(RDS_INFO_IB_CONNECTIONS, rds_ib_ic_info);
613#if IS_ENABLED(CONFIG_IPV6)
614 rds_info_register_func(RDS6_INFO_IB_CONNECTIONS, rds6_ib_ic_info);
615#endif
616
617 goto out;
618
619out_sysctl:
620 rds_ib_sysctl_exit();
621out_ibreg:
622 rds_ib_unregister_client();
623out_mr_exit:
624 rds_ib_mr_exit();
625out:
626 return ret;
627}
628
629MODULE_LICENSE("GPL");