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1/*
2 * Copyright (c) 2005 Voltaire Inc. All rights reserved.
3 * Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved.
4 * Copyright (c) 1999-2005, Mellanox Technologies, Inc. All rights reserved.
5 * Copyright (c) 2005-2006 Intel Corporation. All rights reserved.
6 *
7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
12 *
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
15 * conditions are met:
16 *
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
19 * disclaimer.
20 *
21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
25 *
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 * SOFTWARE.
34 */
35
36#include <linux/completion.h>
37#include <linux/in.h>
38#include <linux/in6.h>
39#include <linux/mutex.h>
40#include <linux/random.h>
41#include <linux/idr.h>
42#include <linux/inetdevice.h>
43#include <linux/slab.h>
44
45#include <net/tcp.h>
46#include <net/ipv6.h>
47
48#include <rdma/rdma_cm.h>
49#include <rdma/rdma_cm_ib.h>
50#include <rdma/rdma_netlink.h>
51#include <rdma/ib_cache.h>
52#include <rdma/ib_cm.h>
53#include <rdma/ib_sa.h>
54#include <rdma/iw_cm.h>
55
56MODULE_AUTHOR("Sean Hefty");
57MODULE_DESCRIPTION("Generic RDMA CM Agent");
58MODULE_LICENSE("Dual BSD/GPL");
59
60#define CMA_CM_RESPONSE_TIMEOUT 20
61#define CMA_MAX_CM_RETRIES 15
62#define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
63#define CMA_IBOE_PACKET_LIFETIME 18
64
65static void cma_add_one(struct ib_device *device);
66static void cma_remove_one(struct ib_device *device);
67
68static struct ib_client cma_client = {
69 .name = "cma",
70 .add = cma_add_one,
71 .remove = cma_remove_one
72};
73
74static struct ib_sa_client sa_client;
75static struct rdma_addr_client addr_client;
76static LIST_HEAD(dev_list);
77static LIST_HEAD(listen_any_list);
78static DEFINE_MUTEX(lock);
79static struct workqueue_struct *cma_wq;
80static DEFINE_IDR(sdp_ps);
81static DEFINE_IDR(tcp_ps);
82static DEFINE_IDR(udp_ps);
83static DEFINE_IDR(ipoib_ps);
84
85struct cma_device {
86 struct list_head list;
87 struct ib_device *device;
88 struct completion comp;
89 atomic_t refcount;
90 struct list_head id_list;
91};
92
93struct rdma_bind_list {
94 struct idr *ps;
95 struct hlist_head owners;
96 unsigned short port;
97};
98
99/*
100 * Device removal can occur at anytime, so we need extra handling to
101 * serialize notifying the user of device removal with other callbacks.
102 * We do this by disabling removal notification while a callback is in process,
103 * and reporting it after the callback completes.
104 */
105struct rdma_id_private {
106 struct rdma_cm_id id;
107
108 struct rdma_bind_list *bind_list;
109 struct hlist_node node;
110 struct list_head list; /* listen_any_list or cma_device.list */
111 struct list_head listen_list; /* per device listens */
112 struct cma_device *cma_dev;
113 struct list_head mc_list;
114
115 int internal_id;
116 enum rdma_cm_state state;
117 spinlock_t lock;
118 struct mutex qp_mutex;
119
120 struct completion comp;
121 atomic_t refcount;
122 struct mutex handler_mutex;
123
124 int backlog;
125 int timeout_ms;
126 struct ib_sa_query *query;
127 int query_id;
128 union {
129 struct ib_cm_id *ib;
130 struct iw_cm_id *iw;
131 } cm_id;
132
133 u32 seq_num;
134 u32 qkey;
135 u32 qp_num;
136 pid_t owner;
137 u8 srq;
138 u8 tos;
139 u8 reuseaddr;
140};
141
142struct cma_multicast {
143 struct rdma_id_private *id_priv;
144 union {
145 struct ib_sa_multicast *ib;
146 } multicast;
147 struct list_head list;
148 void *context;
149 struct sockaddr_storage addr;
150 struct kref mcref;
151};
152
153struct cma_work {
154 struct work_struct work;
155 struct rdma_id_private *id;
156 enum rdma_cm_state old_state;
157 enum rdma_cm_state new_state;
158 struct rdma_cm_event event;
159};
160
161struct cma_ndev_work {
162 struct work_struct work;
163 struct rdma_id_private *id;
164 struct rdma_cm_event event;
165};
166
167struct iboe_mcast_work {
168 struct work_struct work;
169 struct rdma_id_private *id;
170 struct cma_multicast *mc;
171};
172
173union cma_ip_addr {
174 struct in6_addr ip6;
175 struct {
176 __be32 pad[3];
177 __be32 addr;
178 } ip4;
179};
180
181struct cma_hdr {
182 u8 cma_version;
183 u8 ip_version; /* IP version: 7:4 */
184 __be16 port;
185 union cma_ip_addr src_addr;
186 union cma_ip_addr dst_addr;
187};
188
189struct sdp_hh {
190 u8 bsdh[16];
191 u8 sdp_version; /* Major version: 7:4 */
192 u8 ip_version; /* IP version: 7:4 */
193 u8 sdp_specific1[10];
194 __be16 port;
195 __be16 sdp_specific2;
196 union cma_ip_addr src_addr;
197 union cma_ip_addr dst_addr;
198};
199
200struct sdp_hah {
201 u8 bsdh[16];
202 u8 sdp_version;
203};
204
205#define CMA_VERSION 0x00
206#define SDP_MAJ_VERSION 0x2
207
208static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp)
209{
210 unsigned long flags;
211 int ret;
212
213 spin_lock_irqsave(&id_priv->lock, flags);
214 ret = (id_priv->state == comp);
215 spin_unlock_irqrestore(&id_priv->lock, flags);
216 return ret;
217}
218
219static int cma_comp_exch(struct rdma_id_private *id_priv,
220 enum rdma_cm_state comp, enum rdma_cm_state exch)
221{
222 unsigned long flags;
223 int ret;
224
225 spin_lock_irqsave(&id_priv->lock, flags);
226 if ((ret = (id_priv->state == comp)))
227 id_priv->state = exch;
228 spin_unlock_irqrestore(&id_priv->lock, flags);
229 return ret;
230}
231
232static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv,
233 enum rdma_cm_state exch)
234{
235 unsigned long flags;
236 enum rdma_cm_state old;
237
238 spin_lock_irqsave(&id_priv->lock, flags);
239 old = id_priv->state;
240 id_priv->state = exch;
241 spin_unlock_irqrestore(&id_priv->lock, flags);
242 return old;
243}
244
245static inline u8 cma_get_ip_ver(struct cma_hdr *hdr)
246{
247 return hdr->ip_version >> 4;
248}
249
250static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
251{
252 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
253}
254
255static inline u8 sdp_get_majv(u8 sdp_version)
256{
257 return sdp_version >> 4;
258}
259
260static inline u8 sdp_get_ip_ver(struct sdp_hh *hh)
261{
262 return hh->ip_version >> 4;
263}
264
265static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver)
266{
267 hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF);
268}
269
270static void cma_attach_to_dev(struct rdma_id_private *id_priv,
271 struct cma_device *cma_dev)
272{
273 atomic_inc(&cma_dev->refcount);
274 id_priv->cma_dev = cma_dev;
275 id_priv->id.device = cma_dev->device;
276 id_priv->id.route.addr.dev_addr.transport =
277 rdma_node_get_transport(cma_dev->device->node_type);
278 list_add_tail(&id_priv->list, &cma_dev->id_list);
279}
280
281static inline void cma_deref_dev(struct cma_device *cma_dev)
282{
283 if (atomic_dec_and_test(&cma_dev->refcount))
284 complete(&cma_dev->comp);
285}
286
287static inline void release_mc(struct kref *kref)
288{
289 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
290
291 kfree(mc->multicast.ib);
292 kfree(mc);
293}
294
295static void cma_release_dev(struct rdma_id_private *id_priv)
296{
297 mutex_lock(&lock);
298 list_del(&id_priv->list);
299 cma_deref_dev(id_priv->cma_dev);
300 id_priv->cma_dev = NULL;
301 mutex_unlock(&lock);
302}
303
304static int cma_set_qkey(struct rdma_id_private *id_priv)
305{
306 struct ib_sa_mcmember_rec rec;
307 int ret = 0;
308
309 if (id_priv->qkey)
310 return 0;
311
312 switch (id_priv->id.ps) {
313 case RDMA_PS_UDP:
314 id_priv->qkey = RDMA_UDP_QKEY;
315 break;
316 case RDMA_PS_IPOIB:
317 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
318 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
319 id_priv->id.port_num, &rec.mgid,
320 &rec);
321 if (!ret)
322 id_priv->qkey = be32_to_cpu(rec.qkey);
323 break;
324 default:
325 break;
326 }
327 return ret;
328}
329
330static int find_gid_port(struct ib_device *device, union ib_gid *gid, u8 port_num)
331{
332 int i;
333 int err;
334 struct ib_port_attr props;
335 union ib_gid tmp;
336
337 err = ib_query_port(device, port_num, &props);
338 if (err)
339 return 1;
340
341 for (i = 0; i < props.gid_tbl_len; ++i) {
342 err = ib_query_gid(device, port_num, i, &tmp);
343 if (err)
344 return 1;
345 if (!memcmp(&tmp, gid, sizeof tmp))
346 return 0;
347 }
348
349 return -EAGAIN;
350}
351
352static int cma_acquire_dev(struct rdma_id_private *id_priv)
353{
354 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
355 struct cma_device *cma_dev;
356 union ib_gid gid, iboe_gid;
357 int ret = -ENODEV;
358 u8 port;
359 enum rdma_link_layer dev_ll = dev_addr->dev_type == ARPHRD_INFINIBAND ?
360 IB_LINK_LAYER_INFINIBAND : IB_LINK_LAYER_ETHERNET;
361
362 if (dev_ll != IB_LINK_LAYER_INFINIBAND &&
363 id_priv->id.ps == RDMA_PS_IPOIB)
364 return -EINVAL;
365
366 mutex_lock(&lock);
367 iboe_addr_get_sgid(dev_addr, &iboe_gid);
368 memcpy(&gid, dev_addr->src_dev_addr +
369 rdma_addr_gid_offset(dev_addr), sizeof gid);
370 list_for_each_entry(cma_dev, &dev_list, list) {
371 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
372 if (rdma_port_get_link_layer(cma_dev->device, port) == dev_ll) {
373 if (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB &&
374 rdma_port_get_link_layer(cma_dev->device, port) == IB_LINK_LAYER_ETHERNET)
375 ret = find_gid_port(cma_dev->device, &iboe_gid, port);
376 else
377 ret = find_gid_port(cma_dev->device, &gid, port);
378
379 if (!ret) {
380 id_priv->id.port_num = port;
381 goto out;
382 } else if (ret == 1)
383 break;
384 }
385 }
386 }
387
388out:
389 if (!ret)
390 cma_attach_to_dev(id_priv, cma_dev);
391
392 mutex_unlock(&lock);
393 return ret;
394}
395
396static void cma_deref_id(struct rdma_id_private *id_priv)
397{
398 if (atomic_dec_and_test(&id_priv->refcount))
399 complete(&id_priv->comp);
400}
401
402static int cma_disable_callback(struct rdma_id_private *id_priv,
403 enum rdma_cm_state state)
404{
405 mutex_lock(&id_priv->handler_mutex);
406 if (id_priv->state != state) {
407 mutex_unlock(&id_priv->handler_mutex);
408 return -EINVAL;
409 }
410 return 0;
411}
412
413struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
414 void *context, enum rdma_port_space ps,
415 enum ib_qp_type qp_type)
416{
417 struct rdma_id_private *id_priv;
418
419 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
420 if (!id_priv)
421 return ERR_PTR(-ENOMEM);
422
423 id_priv->owner = task_pid_nr(current);
424 id_priv->state = RDMA_CM_IDLE;
425 id_priv->id.context = context;
426 id_priv->id.event_handler = event_handler;
427 id_priv->id.ps = ps;
428 id_priv->id.qp_type = qp_type;
429 spin_lock_init(&id_priv->lock);
430 mutex_init(&id_priv->qp_mutex);
431 init_completion(&id_priv->comp);
432 atomic_set(&id_priv->refcount, 1);
433 mutex_init(&id_priv->handler_mutex);
434 INIT_LIST_HEAD(&id_priv->listen_list);
435 INIT_LIST_HEAD(&id_priv->mc_list);
436 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
437
438 return &id_priv->id;
439}
440EXPORT_SYMBOL(rdma_create_id);
441
442static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
443{
444 struct ib_qp_attr qp_attr;
445 int qp_attr_mask, ret;
446
447 qp_attr.qp_state = IB_QPS_INIT;
448 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
449 if (ret)
450 return ret;
451
452 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
453 if (ret)
454 return ret;
455
456 qp_attr.qp_state = IB_QPS_RTR;
457 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
458 if (ret)
459 return ret;
460
461 qp_attr.qp_state = IB_QPS_RTS;
462 qp_attr.sq_psn = 0;
463 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
464
465 return ret;
466}
467
468static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
469{
470 struct ib_qp_attr qp_attr;
471 int qp_attr_mask, ret;
472
473 qp_attr.qp_state = IB_QPS_INIT;
474 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
475 if (ret)
476 return ret;
477
478 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
479}
480
481int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
482 struct ib_qp_init_attr *qp_init_attr)
483{
484 struct rdma_id_private *id_priv;
485 struct ib_qp *qp;
486 int ret;
487
488 id_priv = container_of(id, struct rdma_id_private, id);
489 if (id->device != pd->device)
490 return -EINVAL;
491
492 qp = ib_create_qp(pd, qp_init_attr);
493 if (IS_ERR(qp))
494 return PTR_ERR(qp);
495
496 if (id->qp_type == IB_QPT_UD)
497 ret = cma_init_ud_qp(id_priv, qp);
498 else
499 ret = cma_init_conn_qp(id_priv, qp);
500 if (ret)
501 goto err;
502
503 id->qp = qp;
504 id_priv->qp_num = qp->qp_num;
505 id_priv->srq = (qp->srq != NULL);
506 return 0;
507err:
508 ib_destroy_qp(qp);
509 return ret;
510}
511EXPORT_SYMBOL(rdma_create_qp);
512
513void rdma_destroy_qp(struct rdma_cm_id *id)
514{
515 struct rdma_id_private *id_priv;
516
517 id_priv = container_of(id, struct rdma_id_private, id);
518 mutex_lock(&id_priv->qp_mutex);
519 ib_destroy_qp(id_priv->id.qp);
520 id_priv->id.qp = NULL;
521 mutex_unlock(&id_priv->qp_mutex);
522}
523EXPORT_SYMBOL(rdma_destroy_qp);
524
525static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
526 struct rdma_conn_param *conn_param)
527{
528 struct ib_qp_attr qp_attr;
529 int qp_attr_mask, ret;
530
531 mutex_lock(&id_priv->qp_mutex);
532 if (!id_priv->id.qp) {
533 ret = 0;
534 goto out;
535 }
536
537 /* Need to update QP attributes from default values. */
538 qp_attr.qp_state = IB_QPS_INIT;
539 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
540 if (ret)
541 goto out;
542
543 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
544 if (ret)
545 goto out;
546
547 qp_attr.qp_state = IB_QPS_RTR;
548 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
549 if (ret)
550 goto out;
551
552 if (conn_param)
553 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
554 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
555out:
556 mutex_unlock(&id_priv->qp_mutex);
557 return ret;
558}
559
560static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
561 struct rdma_conn_param *conn_param)
562{
563 struct ib_qp_attr qp_attr;
564 int qp_attr_mask, ret;
565
566 mutex_lock(&id_priv->qp_mutex);
567 if (!id_priv->id.qp) {
568 ret = 0;
569 goto out;
570 }
571
572 qp_attr.qp_state = IB_QPS_RTS;
573 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
574 if (ret)
575 goto out;
576
577 if (conn_param)
578 qp_attr.max_rd_atomic = conn_param->initiator_depth;
579 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
580out:
581 mutex_unlock(&id_priv->qp_mutex);
582 return ret;
583}
584
585static int cma_modify_qp_err(struct rdma_id_private *id_priv)
586{
587 struct ib_qp_attr qp_attr;
588 int ret;
589
590 mutex_lock(&id_priv->qp_mutex);
591 if (!id_priv->id.qp) {
592 ret = 0;
593 goto out;
594 }
595
596 qp_attr.qp_state = IB_QPS_ERR;
597 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
598out:
599 mutex_unlock(&id_priv->qp_mutex);
600 return ret;
601}
602
603static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
604 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
605{
606 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
607 int ret;
608 u16 pkey;
609
610 if (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num) ==
611 IB_LINK_LAYER_INFINIBAND)
612 pkey = ib_addr_get_pkey(dev_addr);
613 else
614 pkey = 0xffff;
615
616 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
617 pkey, &qp_attr->pkey_index);
618 if (ret)
619 return ret;
620
621 qp_attr->port_num = id_priv->id.port_num;
622 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
623
624 if (id_priv->id.qp_type == IB_QPT_UD) {
625 ret = cma_set_qkey(id_priv);
626 if (ret)
627 return ret;
628
629 qp_attr->qkey = id_priv->qkey;
630 *qp_attr_mask |= IB_QP_QKEY;
631 } else {
632 qp_attr->qp_access_flags = 0;
633 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
634 }
635 return 0;
636}
637
638int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
639 int *qp_attr_mask)
640{
641 struct rdma_id_private *id_priv;
642 int ret = 0;
643
644 id_priv = container_of(id, struct rdma_id_private, id);
645 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
646 case RDMA_TRANSPORT_IB:
647 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
648 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
649 else
650 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
651 qp_attr_mask);
652 if (qp_attr->qp_state == IB_QPS_RTR)
653 qp_attr->rq_psn = id_priv->seq_num;
654 break;
655 case RDMA_TRANSPORT_IWARP:
656 if (!id_priv->cm_id.iw) {
657 qp_attr->qp_access_flags = 0;
658 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
659 } else
660 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
661 qp_attr_mask);
662 break;
663 default:
664 ret = -ENOSYS;
665 break;
666 }
667
668 return ret;
669}
670EXPORT_SYMBOL(rdma_init_qp_attr);
671
672static inline int cma_zero_addr(struct sockaddr *addr)
673{
674 struct in6_addr *ip6;
675
676 if (addr->sa_family == AF_INET)
677 return ipv4_is_zeronet(
678 ((struct sockaddr_in *)addr)->sin_addr.s_addr);
679 else {
680 ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr;
681 return (ip6->s6_addr32[0] | ip6->s6_addr32[1] |
682 ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0;
683 }
684}
685
686static inline int cma_loopback_addr(struct sockaddr *addr)
687{
688 if (addr->sa_family == AF_INET)
689 return ipv4_is_loopback(
690 ((struct sockaddr_in *) addr)->sin_addr.s_addr);
691 else
692 return ipv6_addr_loopback(
693 &((struct sockaddr_in6 *) addr)->sin6_addr);
694}
695
696static inline int cma_any_addr(struct sockaddr *addr)
697{
698 return cma_zero_addr(addr) || cma_loopback_addr(addr);
699}
700
701static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
702{
703 if (src->sa_family != dst->sa_family)
704 return -1;
705
706 switch (src->sa_family) {
707 case AF_INET:
708 return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
709 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
710 default:
711 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
712 &((struct sockaddr_in6 *) dst)->sin6_addr);
713 }
714}
715
716static inline __be16 cma_port(struct sockaddr *addr)
717{
718 if (addr->sa_family == AF_INET)
719 return ((struct sockaddr_in *) addr)->sin_port;
720 else
721 return ((struct sockaddr_in6 *) addr)->sin6_port;
722}
723
724static inline int cma_any_port(struct sockaddr *addr)
725{
726 return !cma_port(addr);
727}
728
729static int cma_get_net_info(void *hdr, enum rdma_port_space ps,
730 u8 *ip_ver, __be16 *port,
731 union cma_ip_addr **src, union cma_ip_addr **dst)
732{
733 switch (ps) {
734 case RDMA_PS_SDP:
735 if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) !=
736 SDP_MAJ_VERSION)
737 return -EINVAL;
738
739 *ip_ver = sdp_get_ip_ver(hdr);
740 *port = ((struct sdp_hh *) hdr)->port;
741 *src = &((struct sdp_hh *) hdr)->src_addr;
742 *dst = &((struct sdp_hh *) hdr)->dst_addr;
743 break;
744 default:
745 if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION)
746 return -EINVAL;
747
748 *ip_ver = cma_get_ip_ver(hdr);
749 *port = ((struct cma_hdr *) hdr)->port;
750 *src = &((struct cma_hdr *) hdr)->src_addr;
751 *dst = &((struct cma_hdr *) hdr)->dst_addr;
752 break;
753 }
754
755 if (*ip_ver != 4 && *ip_ver != 6)
756 return -EINVAL;
757 return 0;
758}
759
760static void cma_save_net_info(struct rdma_addr *addr,
761 struct rdma_addr *listen_addr,
762 u8 ip_ver, __be16 port,
763 union cma_ip_addr *src, union cma_ip_addr *dst)
764{
765 struct sockaddr_in *listen4, *ip4;
766 struct sockaddr_in6 *listen6, *ip6;
767
768 switch (ip_ver) {
769 case 4:
770 listen4 = (struct sockaddr_in *) &listen_addr->src_addr;
771 ip4 = (struct sockaddr_in *) &addr->src_addr;
772 ip4->sin_family = listen4->sin_family;
773 ip4->sin_addr.s_addr = dst->ip4.addr;
774 ip4->sin_port = listen4->sin_port;
775
776 ip4 = (struct sockaddr_in *) &addr->dst_addr;
777 ip4->sin_family = listen4->sin_family;
778 ip4->sin_addr.s_addr = src->ip4.addr;
779 ip4->sin_port = port;
780 break;
781 case 6:
782 listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr;
783 ip6 = (struct sockaddr_in6 *) &addr->src_addr;
784 ip6->sin6_family = listen6->sin6_family;
785 ip6->sin6_addr = dst->ip6;
786 ip6->sin6_port = listen6->sin6_port;
787
788 ip6 = (struct sockaddr_in6 *) &addr->dst_addr;
789 ip6->sin6_family = listen6->sin6_family;
790 ip6->sin6_addr = src->ip6;
791 ip6->sin6_port = port;
792 break;
793 default:
794 break;
795 }
796}
797
798static inline int cma_user_data_offset(enum rdma_port_space ps)
799{
800 switch (ps) {
801 case RDMA_PS_SDP:
802 return 0;
803 default:
804 return sizeof(struct cma_hdr);
805 }
806}
807
808static void cma_cancel_route(struct rdma_id_private *id_priv)
809{
810 switch (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num)) {
811 case IB_LINK_LAYER_INFINIBAND:
812 if (id_priv->query)
813 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
814 break;
815 default:
816 break;
817 }
818}
819
820static void cma_cancel_listens(struct rdma_id_private *id_priv)
821{
822 struct rdma_id_private *dev_id_priv;
823
824 /*
825 * Remove from listen_any_list to prevent added devices from spawning
826 * additional listen requests.
827 */
828 mutex_lock(&lock);
829 list_del(&id_priv->list);
830
831 while (!list_empty(&id_priv->listen_list)) {
832 dev_id_priv = list_entry(id_priv->listen_list.next,
833 struct rdma_id_private, listen_list);
834 /* sync with device removal to avoid duplicate destruction */
835 list_del_init(&dev_id_priv->list);
836 list_del(&dev_id_priv->listen_list);
837 mutex_unlock(&lock);
838
839 rdma_destroy_id(&dev_id_priv->id);
840 mutex_lock(&lock);
841 }
842 mutex_unlock(&lock);
843}
844
845static void cma_cancel_operation(struct rdma_id_private *id_priv,
846 enum rdma_cm_state state)
847{
848 switch (state) {
849 case RDMA_CM_ADDR_QUERY:
850 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
851 break;
852 case RDMA_CM_ROUTE_QUERY:
853 cma_cancel_route(id_priv);
854 break;
855 case RDMA_CM_LISTEN:
856 if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr)
857 && !id_priv->cma_dev)
858 cma_cancel_listens(id_priv);
859 break;
860 default:
861 break;
862 }
863}
864
865static void cma_release_port(struct rdma_id_private *id_priv)
866{
867 struct rdma_bind_list *bind_list = id_priv->bind_list;
868
869 if (!bind_list)
870 return;
871
872 mutex_lock(&lock);
873 hlist_del(&id_priv->node);
874 if (hlist_empty(&bind_list->owners)) {
875 idr_remove(bind_list->ps, bind_list->port);
876 kfree(bind_list);
877 }
878 mutex_unlock(&lock);
879}
880
881static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
882{
883 struct cma_multicast *mc;
884
885 while (!list_empty(&id_priv->mc_list)) {
886 mc = container_of(id_priv->mc_list.next,
887 struct cma_multicast, list);
888 list_del(&mc->list);
889 switch (rdma_port_get_link_layer(id_priv->cma_dev->device, id_priv->id.port_num)) {
890 case IB_LINK_LAYER_INFINIBAND:
891 ib_sa_free_multicast(mc->multicast.ib);
892 kfree(mc);
893 break;
894 case IB_LINK_LAYER_ETHERNET:
895 kref_put(&mc->mcref, release_mc);
896 break;
897 default:
898 break;
899 }
900 }
901}
902
903void rdma_destroy_id(struct rdma_cm_id *id)
904{
905 struct rdma_id_private *id_priv;
906 enum rdma_cm_state state;
907
908 id_priv = container_of(id, struct rdma_id_private, id);
909 state = cma_exch(id_priv, RDMA_CM_DESTROYING);
910 cma_cancel_operation(id_priv, state);
911
912 /*
913 * Wait for any active callback to finish. New callbacks will find
914 * the id_priv state set to destroying and abort.
915 */
916 mutex_lock(&id_priv->handler_mutex);
917 mutex_unlock(&id_priv->handler_mutex);
918
919 if (id_priv->cma_dev) {
920 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
921 case RDMA_TRANSPORT_IB:
922 if (id_priv->cm_id.ib)
923 ib_destroy_cm_id(id_priv->cm_id.ib);
924 break;
925 case RDMA_TRANSPORT_IWARP:
926 if (id_priv->cm_id.iw)
927 iw_destroy_cm_id(id_priv->cm_id.iw);
928 break;
929 default:
930 break;
931 }
932 cma_leave_mc_groups(id_priv);
933 cma_release_dev(id_priv);
934 }
935
936 cma_release_port(id_priv);
937 cma_deref_id(id_priv);
938 wait_for_completion(&id_priv->comp);
939
940 if (id_priv->internal_id)
941 cma_deref_id(id_priv->id.context);
942
943 kfree(id_priv->id.route.path_rec);
944 kfree(id_priv);
945}
946EXPORT_SYMBOL(rdma_destroy_id);
947
948static int cma_rep_recv(struct rdma_id_private *id_priv)
949{
950 int ret;
951
952 ret = cma_modify_qp_rtr(id_priv, NULL);
953 if (ret)
954 goto reject;
955
956 ret = cma_modify_qp_rts(id_priv, NULL);
957 if (ret)
958 goto reject;
959
960 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
961 if (ret)
962 goto reject;
963
964 return 0;
965reject:
966 cma_modify_qp_err(id_priv);
967 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
968 NULL, 0, NULL, 0);
969 return ret;
970}
971
972static int cma_verify_rep(struct rdma_id_private *id_priv, void *data)
973{
974 if (id_priv->id.ps == RDMA_PS_SDP &&
975 sdp_get_majv(((struct sdp_hah *) data)->sdp_version) !=
976 SDP_MAJ_VERSION)
977 return -EINVAL;
978
979 return 0;
980}
981
982static void cma_set_rep_event_data(struct rdma_cm_event *event,
983 struct ib_cm_rep_event_param *rep_data,
984 void *private_data)
985{
986 event->param.conn.private_data = private_data;
987 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
988 event->param.conn.responder_resources = rep_data->responder_resources;
989 event->param.conn.initiator_depth = rep_data->initiator_depth;
990 event->param.conn.flow_control = rep_data->flow_control;
991 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
992 event->param.conn.srq = rep_data->srq;
993 event->param.conn.qp_num = rep_data->remote_qpn;
994}
995
996static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
997{
998 struct rdma_id_private *id_priv = cm_id->context;
999 struct rdma_cm_event event;
1000 int ret = 0;
1001
1002 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
1003 cma_disable_callback(id_priv, RDMA_CM_CONNECT)) ||
1004 (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
1005 cma_disable_callback(id_priv, RDMA_CM_DISCONNECT)))
1006 return 0;
1007
1008 memset(&event, 0, sizeof event);
1009 switch (ib_event->event) {
1010 case IB_CM_REQ_ERROR:
1011 case IB_CM_REP_ERROR:
1012 event.event = RDMA_CM_EVENT_UNREACHABLE;
1013 event.status = -ETIMEDOUT;
1014 break;
1015 case IB_CM_REP_RECEIVED:
1016 event.status = cma_verify_rep(id_priv, ib_event->private_data);
1017 if (event.status)
1018 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1019 else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) {
1020 event.status = cma_rep_recv(id_priv);
1021 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1022 RDMA_CM_EVENT_ESTABLISHED;
1023 } else
1024 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
1025 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1026 ib_event->private_data);
1027 break;
1028 case IB_CM_RTU_RECEIVED:
1029 case IB_CM_USER_ESTABLISHED:
1030 event.event = RDMA_CM_EVENT_ESTABLISHED;
1031 break;
1032 case IB_CM_DREQ_ERROR:
1033 event.status = -ETIMEDOUT; /* fall through */
1034 case IB_CM_DREQ_RECEIVED:
1035 case IB_CM_DREP_RECEIVED:
1036 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
1037 RDMA_CM_DISCONNECT))
1038 goto out;
1039 event.event = RDMA_CM_EVENT_DISCONNECTED;
1040 break;
1041 case IB_CM_TIMEWAIT_EXIT:
1042 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1043 break;
1044 case IB_CM_MRA_RECEIVED:
1045 /* ignore event */
1046 goto out;
1047 case IB_CM_REJ_RECEIVED:
1048 cma_modify_qp_err(id_priv);
1049 event.status = ib_event->param.rej_rcvd.reason;
1050 event.event = RDMA_CM_EVENT_REJECTED;
1051 event.param.conn.private_data = ib_event->private_data;
1052 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
1053 break;
1054 default:
1055 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
1056 ib_event->event);
1057 goto out;
1058 }
1059
1060 ret = id_priv->id.event_handler(&id_priv->id, &event);
1061 if (ret) {
1062 /* Destroy the CM ID by returning a non-zero value. */
1063 id_priv->cm_id.ib = NULL;
1064 cma_exch(id_priv, RDMA_CM_DESTROYING);
1065 mutex_unlock(&id_priv->handler_mutex);
1066 rdma_destroy_id(&id_priv->id);
1067 return ret;
1068 }
1069out:
1070 mutex_unlock(&id_priv->handler_mutex);
1071 return ret;
1072}
1073
1074static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
1075 struct ib_cm_event *ib_event)
1076{
1077 struct rdma_id_private *id_priv;
1078 struct rdma_cm_id *id;
1079 struct rdma_route *rt;
1080 union cma_ip_addr *src, *dst;
1081 __be16 port;
1082 u8 ip_ver;
1083 int ret;
1084
1085 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1086 &ip_ver, &port, &src, &dst))
1087 return NULL;
1088
1089 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1090 listen_id->ps, ib_event->param.req_rcvd.qp_type);
1091 if (IS_ERR(id))
1092 return NULL;
1093
1094 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1095 ip_ver, port, src, dst);
1096
1097 rt = &id->route;
1098 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
1099 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1100 GFP_KERNEL);
1101 if (!rt->path_rec)
1102 goto err;
1103
1104 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
1105 if (rt->num_paths == 2)
1106 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1107
1108 if (cma_any_addr((struct sockaddr *) &rt->addr.src_addr)) {
1109 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
1110 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
1111 ib_addr_set_pkey(&rt->addr.dev_addr, rt->path_rec[0].pkey);
1112 } else {
1113 ret = rdma_translate_ip((struct sockaddr *) &rt->addr.src_addr,
1114 &rt->addr.dev_addr);
1115 if (ret)
1116 goto err;
1117 }
1118 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
1119
1120 id_priv = container_of(id, struct rdma_id_private, id);
1121 id_priv->state = RDMA_CM_CONNECT;
1122 return id_priv;
1123
1124err:
1125 rdma_destroy_id(id);
1126 return NULL;
1127}
1128
1129static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1130 struct ib_cm_event *ib_event)
1131{
1132 struct rdma_id_private *id_priv;
1133 struct rdma_cm_id *id;
1134 union cma_ip_addr *src, *dst;
1135 __be16 port;
1136 u8 ip_ver;
1137 int ret;
1138
1139 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1140 listen_id->ps, IB_QPT_UD);
1141 if (IS_ERR(id))
1142 return NULL;
1143
1144
1145 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1146 &ip_ver, &port, &src, &dst))
1147 goto err;
1148
1149 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1150 ip_ver, port, src, dst);
1151
1152 if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) {
1153 ret = rdma_translate_ip((struct sockaddr *) &id->route.addr.src_addr,
1154 &id->route.addr.dev_addr);
1155 if (ret)
1156 goto err;
1157 }
1158
1159 id_priv = container_of(id, struct rdma_id_private, id);
1160 id_priv->state = RDMA_CM_CONNECT;
1161 return id_priv;
1162err:
1163 rdma_destroy_id(id);
1164 return NULL;
1165}
1166
1167static void cma_set_req_event_data(struct rdma_cm_event *event,
1168 struct ib_cm_req_event_param *req_data,
1169 void *private_data, int offset)
1170{
1171 event->param.conn.private_data = private_data + offset;
1172 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1173 event->param.conn.responder_resources = req_data->responder_resources;
1174 event->param.conn.initiator_depth = req_data->initiator_depth;
1175 event->param.conn.flow_control = req_data->flow_control;
1176 event->param.conn.retry_count = req_data->retry_count;
1177 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1178 event->param.conn.srq = req_data->srq;
1179 event->param.conn.qp_num = req_data->remote_qpn;
1180}
1181
1182static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1183{
1184 struct rdma_id_private *listen_id, *conn_id;
1185 struct rdma_cm_event event;
1186 int offset, ret;
1187
1188 listen_id = cm_id->context;
1189 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
1190 return -ECONNABORTED;
1191
1192 memset(&event, 0, sizeof event);
1193 offset = cma_user_data_offset(listen_id->id.ps);
1194 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1195 if (listen_id->id.qp_type == IB_QPT_UD) {
1196 conn_id = cma_new_udp_id(&listen_id->id, ib_event);
1197 event.param.ud.private_data = ib_event->private_data + offset;
1198 event.param.ud.private_data_len =
1199 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1200 } else {
1201 conn_id = cma_new_conn_id(&listen_id->id, ib_event);
1202 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1203 ib_event->private_data, offset);
1204 }
1205 if (!conn_id) {
1206 ret = -ENOMEM;
1207 goto out;
1208 }
1209
1210 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1211 ret = cma_acquire_dev(conn_id);
1212 if (ret)
1213 goto release_conn_id;
1214
1215 conn_id->cm_id.ib = cm_id;
1216 cm_id->context = conn_id;
1217 cm_id->cm_handler = cma_ib_handler;
1218
1219 /*
1220 * Protect against the user destroying conn_id from another thread
1221 * until we're done accessing it.
1222 */
1223 atomic_inc(&conn_id->refcount);
1224 ret = conn_id->id.event_handler(&conn_id->id, &event);
1225 if (!ret) {
1226 /*
1227 * Acquire mutex to prevent user executing rdma_destroy_id()
1228 * while we're accessing the cm_id.
1229 */
1230 mutex_lock(&lock);
1231 if (cma_comp(conn_id, RDMA_CM_CONNECT) && (conn_id->id.qp_type != IB_QPT_UD))
1232 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1233 mutex_unlock(&lock);
1234 mutex_unlock(&conn_id->handler_mutex);
1235 cma_deref_id(conn_id);
1236 goto out;
1237 }
1238 cma_deref_id(conn_id);
1239
1240 /* Destroy the CM ID by returning a non-zero value. */
1241 conn_id->cm_id.ib = NULL;
1242
1243release_conn_id:
1244 cma_exch(conn_id, RDMA_CM_DESTROYING);
1245 mutex_unlock(&conn_id->handler_mutex);
1246 rdma_destroy_id(&conn_id->id);
1247
1248out:
1249 mutex_unlock(&listen_id->handler_mutex);
1250 return ret;
1251}
1252
1253static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr)
1254{
1255 return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr)));
1256}
1257
1258static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr,
1259 struct ib_cm_compare_data *compare)
1260{
1261 struct cma_hdr *cma_data, *cma_mask;
1262 struct sdp_hh *sdp_data, *sdp_mask;
1263 __be32 ip4_addr;
1264 struct in6_addr ip6_addr;
1265
1266 memset(compare, 0, sizeof *compare);
1267 cma_data = (void *) compare->data;
1268 cma_mask = (void *) compare->mask;
1269 sdp_data = (void *) compare->data;
1270 sdp_mask = (void *) compare->mask;
1271
1272 switch (addr->sa_family) {
1273 case AF_INET:
1274 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1275 if (ps == RDMA_PS_SDP) {
1276 sdp_set_ip_ver(sdp_data, 4);
1277 sdp_set_ip_ver(sdp_mask, 0xF);
1278 sdp_data->dst_addr.ip4.addr = ip4_addr;
1279 sdp_mask->dst_addr.ip4.addr = htonl(~0);
1280 } else {
1281 cma_set_ip_ver(cma_data, 4);
1282 cma_set_ip_ver(cma_mask, 0xF);
1283 cma_data->dst_addr.ip4.addr = ip4_addr;
1284 cma_mask->dst_addr.ip4.addr = htonl(~0);
1285 }
1286 break;
1287 case AF_INET6:
1288 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr;
1289 if (ps == RDMA_PS_SDP) {
1290 sdp_set_ip_ver(sdp_data, 6);
1291 sdp_set_ip_ver(sdp_mask, 0xF);
1292 sdp_data->dst_addr.ip6 = ip6_addr;
1293 memset(&sdp_mask->dst_addr.ip6, 0xFF,
1294 sizeof sdp_mask->dst_addr.ip6);
1295 } else {
1296 cma_set_ip_ver(cma_data, 6);
1297 cma_set_ip_ver(cma_mask, 0xF);
1298 cma_data->dst_addr.ip6 = ip6_addr;
1299 memset(&cma_mask->dst_addr.ip6, 0xFF,
1300 sizeof cma_mask->dst_addr.ip6);
1301 }
1302 break;
1303 default:
1304 break;
1305 }
1306}
1307
1308static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1309{
1310 struct rdma_id_private *id_priv = iw_id->context;
1311 struct rdma_cm_event event;
1312 struct sockaddr_in *sin;
1313 int ret = 0;
1314
1315 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
1316 return 0;
1317
1318 memset(&event, 0, sizeof event);
1319 switch (iw_event->event) {
1320 case IW_CM_EVENT_CLOSE:
1321 event.event = RDMA_CM_EVENT_DISCONNECTED;
1322 break;
1323 case IW_CM_EVENT_CONNECT_REPLY:
1324 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1325 *sin = iw_event->local_addr;
1326 sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr;
1327 *sin = iw_event->remote_addr;
1328 switch (iw_event->status) {
1329 case 0:
1330 event.event = RDMA_CM_EVENT_ESTABLISHED;
1331 break;
1332 case -ECONNRESET:
1333 case -ECONNREFUSED:
1334 event.event = RDMA_CM_EVENT_REJECTED;
1335 break;
1336 case -ETIMEDOUT:
1337 event.event = RDMA_CM_EVENT_UNREACHABLE;
1338 break;
1339 default:
1340 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1341 break;
1342 }
1343 break;
1344 case IW_CM_EVENT_ESTABLISHED:
1345 event.event = RDMA_CM_EVENT_ESTABLISHED;
1346 break;
1347 default:
1348 BUG_ON(1);
1349 }
1350
1351 event.status = iw_event->status;
1352 event.param.conn.private_data = iw_event->private_data;
1353 event.param.conn.private_data_len = iw_event->private_data_len;
1354 ret = id_priv->id.event_handler(&id_priv->id, &event);
1355 if (ret) {
1356 /* Destroy the CM ID by returning a non-zero value. */
1357 id_priv->cm_id.iw = NULL;
1358 cma_exch(id_priv, RDMA_CM_DESTROYING);
1359 mutex_unlock(&id_priv->handler_mutex);
1360 rdma_destroy_id(&id_priv->id);
1361 return ret;
1362 }
1363
1364 mutex_unlock(&id_priv->handler_mutex);
1365 return ret;
1366}
1367
1368static int iw_conn_req_handler(struct iw_cm_id *cm_id,
1369 struct iw_cm_event *iw_event)
1370{
1371 struct rdma_cm_id *new_cm_id;
1372 struct rdma_id_private *listen_id, *conn_id;
1373 struct sockaddr_in *sin;
1374 struct net_device *dev = NULL;
1375 struct rdma_cm_event event;
1376 int ret;
1377 struct ib_device_attr attr;
1378
1379 listen_id = cm_id->context;
1380 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
1381 return -ECONNABORTED;
1382
1383 /* Create a new RDMA id for the new IW CM ID */
1384 new_cm_id = rdma_create_id(listen_id->id.event_handler,
1385 listen_id->id.context,
1386 RDMA_PS_TCP, IB_QPT_RC);
1387 if (IS_ERR(new_cm_id)) {
1388 ret = -ENOMEM;
1389 goto out;
1390 }
1391 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
1392 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1393 conn_id->state = RDMA_CM_CONNECT;
1394
1395 dev = ip_dev_find(&init_net, iw_event->local_addr.sin_addr.s_addr);
1396 if (!dev) {
1397 ret = -EADDRNOTAVAIL;
1398 mutex_unlock(&conn_id->handler_mutex);
1399 rdma_destroy_id(new_cm_id);
1400 goto out;
1401 }
1402 ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL);
1403 if (ret) {
1404 mutex_unlock(&conn_id->handler_mutex);
1405 rdma_destroy_id(new_cm_id);
1406 goto out;
1407 }
1408
1409 ret = cma_acquire_dev(conn_id);
1410 if (ret) {
1411 mutex_unlock(&conn_id->handler_mutex);
1412 rdma_destroy_id(new_cm_id);
1413 goto out;
1414 }
1415
1416 conn_id->cm_id.iw = cm_id;
1417 cm_id->context = conn_id;
1418 cm_id->cm_handler = cma_iw_handler;
1419
1420 sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr;
1421 *sin = iw_event->local_addr;
1422 sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr;
1423 *sin = iw_event->remote_addr;
1424
1425 ret = ib_query_device(conn_id->id.device, &attr);
1426 if (ret) {
1427 mutex_unlock(&conn_id->handler_mutex);
1428 rdma_destroy_id(new_cm_id);
1429 goto out;
1430 }
1431
1432 memset(&event, 0, sizeof event);
1433 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1434 event.param.conn.private_data = iw_event->private_data;
1435 event.param.conn.private_data_len = iw_event->private_data_len;
1436 event.param.conn.initiator_depth = attr.max_qp_init_rd_atom;
1437 event.param.conn.responder_resources = attr.max_qp_rd_atom;
1438
1439 /*
1440 * Protect against the user destroying conn_id from another thread
1441 * until we're done accessing it.
1442 */
1443 atomic_inc(&conn_id->refcount);
1444 ret = conn_id->id.event_handler(&conn_id->id, &event);
1445 if (ret) {
1446 /* User wants to destroy the CM ID */
1447 conn_id->cm_id.iw = NULL;
1448 cma_exch(conn_id, RDMA_CM_DESTROYING);
1449 mutex_unlock(&conn_id->handler_mutex);
1450 cma_deref_id(conn_id);
1451 rdma_destroy_id(&conn_id->id);
1452 goto out;
1453 }
1454
1455 mutex_unlock(&conn_id->handler_mutex);
1456 cma_deref_id(conn_id);
1457
1458out:
1459 if (dev)
1460 dev_put(dev);
1461 mutex_unlock(&listen_id->handler_mutex);
1462 return ret;
1463}
1464
1465static int cma_ib_listen(struct rdma_id_private *id_priv)
1466{
1467 struct ib_cm_compare_data compare_data;
1468 struct sockaddr *addr;
1469 struct ib_cm_id *id;
1470 __be64 svc_id;
1471 int ret;
1472
1473 id = ib_create_cm_id(id_priv->id.device, cma_req_handler, id_priv);
1474 if (IS_ERR(id))
1475 return PTR_ERR(id);
1476
1477 id_priv->cm_id.ib = id;
1478
1479 addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
1480 svc_id = cma_get_service_id(id_priv->id.ps, addr);
1481 if (cma_any_addr(addr))
1482 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL);
1483 else {
1484 cma_set_compare_data(id_priv->id.ps, addr, &compare_data);
1485 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data);
1486 }
1487
1488 if (ret) {
1489 ib_destroy_cm_id(id_priv->cm_id.ib);
1490 id_priv->cm_id.ib = NULL;
1491 }
1492
1493 return ret;
1494}
1495
1496static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
1497{
1498 int ret;
1499 struct sockaddr_in *sin;
1500 struct iw_cm_id *id;
1501
1502 id = iw_create_cm_id(id_priv->id.device,
1503 iw_conn_req_handler,
1504 id_priv);
1505 if (IS_ERR(id))
1506 return PTR_ERR(id);
1507
1508 id_priv->cm_id.iw = id;
1509
1510 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1511 id_priv->cm_id.iw->local_addr = *sin;
1512
1513 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
1514
1515 if (ret) {
1516 iw_destroy_cm_id(id_priv->cm_id.iw);
1517 id_priv->cm_id.iw = NULL;
1518 }
1519
1520 return ret;
1521}
1522
1523static int cma_listen_handler(struct rdma_cm_id *id,
1524 struct rdma_cm_event *event)
1525{
1526 struct rdma_id_private *id_priv = id->context;
1527
1528 id->context = id_priv->id.context;
1529 id->event_handler = id_priv->id.event_handler;
1530 return id_priv->id.event_handler(id, event);
1531}
1532
1533static void cma_listen_on_dev(struct rdma_id_private *id_priv,
1534 struct cma_device *cma_dev)
1535{
1536 struct rdma_id_private *dev_id_priv;
1537 struct rdma_cm_id *id;
1538 int ret;
1539
1540 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps,
1541 id_priv->id.qp_type);
1542 if (IS_ERR(id))
1543 return;
1544
1545 dev_id_priv = container_of(id, struct rdma_id_private, id);
1546
1547 dev_id_priv->state = RDMA_CM_ADDR_BOUND;
1548 memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr,
1549 ip_addr_size((struct sockaddr *) &id_priv->id.route.addr.src_addr));
1550
1551 cma_attach_to_dev(dev_id_priv, cma_dev);
1552 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
1553 atomic_inc(&id_priv->refcount);
1554 dev_id_priv->internal_id = 1;
1555
1556 ret = rdma_listen(id, id_priv->backlog);
1557 if (ret)
1558 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, "
1559 "listening on device %s\n", ret, cma_dev->device->name);
1560}
1561
1562static void cma_listen_on_all(struct rdma_id_private *id_priv)
1563{
1564 struct cma_device *cma_dev;
1565
1566 mutex_lock(&lock);
1567 list_add_tail(&id_priv->list, &listen_any_list);
1568 list_for_each_entry(cma_dev, &dev_list, list)
1569 cma_listen_on_dev(id_priv, cma_dev);
1570 mutex_unlock(&lock);
1571}
1572
1573void rdma_set_service_type(struct rdma_cm_id *id, int tos)
1574{
1575 struct rdma_id_private *id_priv;
1576
1577 id_priv = container_of(id, struct rdma_id_private, id);
1578 id_priv->tos = (u8) tos;
1579}
1580EXPORT_SYMBOL(rdma_set_service_type);
1581
1582static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
1583 void *context)
1584{
1585 struct cma_work *work = context;
1586 struct rdma_route *route;
1587
1588 route = &work->id->id.route;
1589
1590 if (!status) {
1591 route->num_paths = 1;
1592 *route->path_rec = *path_rec;
1593 } else {
1594 work->old_state = RDMA_CM_ROUTE_QUERY;
1595 work->new_state = RDMA_CM_ADDR_RESOLVED;
1596 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
1597 work->event.status = status;
1598 }
1599
1600 queue_work(cma_wq, &work->work);
1601}
1602
1603static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
1604 struct cma_work *work)
1605{
1606 struct rdma_addr *addr = &id_priv->id.route.addr;
1607 struct ib_sa_path_rec path_rec;
1608 ib_sa_comp_mask comp_mask;
1609 struct sockaddr_in6 *sin6;
1610
1611 memset(&path_rec, 0, sizeof path_rec);
1612 rdma_addr_get_sgid(&addr->dev_addr, &path_rec.sgid);
1613 rdma_addr_get_dgid(&addr->dev_addr, &path_rec.dgid);
1614 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(&addr->dev_addr));
1615 path_rec.numb_path = 1;
1616 path_rec.reversible = 1;
1617 path_rec.service_id = cma_get_service_id(id_priv->id.ps,
1618 (struct sockaddr *) &addr->dst_addr);
1619
1620 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
1621 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
1622 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
1623
1624 if (addr->src_addr.ss_family == AF_INET) {
1625 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
1626 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
1627 } else {
1628 sin6 = (struct sockaddr_in6 *) &addr->src_addr;
1629 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
1630 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
1631 }
1632
1633 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
1634 id_priv->id.port_num, &path_rec,
1635 comp_mask, timeout_ms,
1636 GFP_KERNEL, cma_query_handler,
1637 work, &id_priv->query);
1638
1639 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
1640}
1641
1642static void cma_work_handler(struct work_struct *_work)
1643{
1644 struct cma_work *work = container_of(_work, struct cma_work, work);
1645 struct rdma_id_private *id_priv = work->id;
1646 int destroy = 0;
1647
1648 mutex_lock(&id_priv->handler_mutex);
1649 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
1650 goto out;
1651
1652 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1653 cma_exch(id_priv, RDMA_CM_DESTROYING);
1654 destroy = 1;
1655 }
1656out:
1657 mutex_unlock(&id_priv->handler_mutex);
1658 cma_deref_id(id_priv);
1659 if (destroy)
1660 rdma_destroy_id(&id_priv->id);
1661 kfree(work);
1662}
1663
1664static void cma_ndev_work_handler(struct work_struct *_work)
1665{
1666 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
1667 struct rdma_id_private *id_priv = work->id;
1668 int destroy = 0;
1669
1670 mutex_lock(&id_priv->handler_mutex);
1671 if (id_priv->state == RDMA_CM_DESTROYING ||
1672 id_priv->state == RDMA_CM_DEVICE_REMOVAL)
1673 goto out;
1674
1675 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1676 cma_exch(id_priv, RDMA_CM_DESTROYING);
1677 destroy = 1;
1678 }
1679
1680out:
1681 mutex_unlock(&id_priv->handler_mutex);
1682 cma_deref_id(id_priv);
1683 if (destroy)
1684 rdma_destroy_id(&id_priv->id);
1685 kfree(work);
1686}
1687
1688static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
1689{
1690 struct rdma_route *route = &id_priv->id.route;
1691 struct cma_work *work;
1692 int ret;
1693
1694 work = kzalloc(sizeof *work, GFP_KERNEL);
1695 if (!work)
1696 return -ENOMEM;
1697
1698 work->id = id_priv;
1699 INIT_WORK(&work->work, cma_work_handler);
1700 work->old_state = RDMA_CM_ROUTE_QUERY;
1701 work->new_state = RDMA_CM_ROUTE_RESOLVED;
1702 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1703
1704 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
1705 if (!route->path_rec) {
1706 ret = -ENOMEM;
1707 goto err1;
1708 }
1709
1710 ret = cma_query_ib_route(id_priv, timeout_ms, work);
1711 if (ret)
1712 goto err2;
1713
1714 return 0;
1715err2:
1716 kfree(route->path_rec);
1717 route->path_rec = NULL;
1718err1:
1719 kfree(work);
1720 return ret;
1721}
1722
1723int rdma_set_ib_paths(struct rdma_cm_id *id,
1724 struct ib_sa_path_rec *path_rec, int num_paths)
1725{
1726 struct rdma_id_private *id_priv;
1727 int ret;
1728
1729 id_priv = container_of(id, struct rdma_id_private, id);
1730 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
1731 RDMA_CM_ROUTE_RESOLVED))
1732 return -EINVAL;
1733
1734 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths,
1735 GFP_KERNEL);
1736 if (!id->route.path_rec) {
1737 ret = -ENOMEM;
1738 goto err;
1739 }
1740
1741 id->route.num_paths = num_paths;
1742 return 0;
1743err:
1744 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
1745 return ret;
1746}
1747EXPORT_SYMBOL(rdma_set_ib_paths);
1748
1749static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
1750{
1751 struct cma_work *work;
1752
1753 work = kzalloc(sizeof *work, GFP_KERNEL);
1754 if (!work)
1755 return -ENOMEM;
1756
1757 work->id = id_priv;
1758 INIT_WORK(&work->work, cma_work_handler);
1759 work->old_state = RDMA_CM_ROUTE_QUERY;
1760 work->new_state = RDMA_CM_ROUTE_RESOLVED;
1761 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1762 queue_work(cma_wq, &work->work);
1763 return 0;
1764}
1765
1766static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
1767{
1768 struct rdma_route *route = &id_priv->id.route;
1769 struct rdma_addr *addr = &route->addr;
1770 struct cma_work *work;
1771 int ret;
1772 struct sockaddr_in *src_addr = (struct sockaddr_in *)&route->addr.src_addr;
1773 struct sockaddr_in *dst_addr = (struct sockaddr_in *)&route->addr.dst_addr;
1774 struct net_device *ndev = NULL;
1775 u16 vid;
1776
1777 if (src_addr->sin_family != dst_addr->sin_family)
1778 return -EINVAL;
1779
1780 work = kzalloc(sizeof *work, GFP_KERNEL);
1781 if (!work)
1782 return -ENOMEM;
1783
1784 work->id = id_priv;
1785 INIT_WORK(&work->work, cma_work_handler);
1786
1787 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
1788 if (!route->path_rec) {
1789 ret = -ENOMEM;
1790 goto err1;
1791 }
1792
1793 route->num_paths = 1;
1794
1795 if (addr->dev_addr.bound_dev_if)
1796 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if);
1797 if (!ndev) {
1798 ret = -ENODEV;
1799 goto err2;
1800 }
1801
1802 vid = rdma_vlan_dev_vlan_id(ndev);
1803
1804 iboe_mac_vlan_to_ll(&route->path_rec->sgid, addr->dev_addr.src_dev_addr, vid);
1805 iboe_mac_vlan_to_ll(&route->path_rec->dgid, addr->dev_addr.dst_dev_addr, vid);
1806
1807 route->path_rec->hop_limit = 1;
1808 route->path_rec->reversible = 1;
1809 route->path_rec->pkey = cpu_to_be16(0xffff);
1810 route->path_rec->mtu_selector = IB_SA_EQ;
1811 route->path_rec->sl = id_priv->tos >> 5;
1812
1813 route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
1814 route->path_rec->rate_selector = IB_SA_EQ;
1815 route->path_rec->rate = iboe_get_rate(ndev);
1816 dev_put(ndev);
1817 route->path_rec->packet_life_time_selector = IB_SA_EQ;
1818 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
1819 if (!route->path_rec->mtu) {
1820 ret = -EINVAL;
1821 goto err2;
1822 }
1823
1824 work->old_state = RDMA_CM_ROUTE_QUERY;
1825 work->new_state = RDMA_CM_ROUTE_RESOLVED;
1826 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1827 work->event.status = 0;
1828
1829 queue_work(cma_wq, &work->work);
1830
1831 return 0;
1832
1833err2:
1834 kfree(route->path_rec);
1835 route->path_rec = NULL;
1836err1:
1837 kfree(work);
1838 return ret;
1839}
1840
1841int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
1842{
1843 struct rdma_id_private *id_priv;
1844 int ret;
1845
1846 id_priv = container_of(id, struct rdma_id_private, id);
1847 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
1848 return -EINVAL;
1849
1850 atomic_inc(&id_priv->refcount);
1851 switch (rdma_node_get_transport(id->device->node_type)) {
1852 case RDMA_TRANSPORT_IB:
1853 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
1854 case IB_LINK_LAYER_INFINIBAND:
1855 ret = cma_resolve_ib_route(id_priv, timeout_ms);
1856 break;
1857 case IB_LINK_LAYER_ETHERNET:
1858 ret = cma_resolve_iboe_route(id_priv);
1859 break;
1860 default:
1861 ret = -ENOSYS;
1862 }
1863 break;
1864 case RDMA_TRANSPORT_IWARP:
1865 ret = cma_resolve_iw_route(id_priv, timeout_ms);
1866 break;
1867 default:
1868 ret = -ENOSYS;
1869 break;
1870 }
1871 if (ret)
1872 goto err;
1873
1874 return 0;
1875err:
1876 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
1877 cma_deref_id(id_priv);
1878 return ret;
1879}
1880EXPORT_SYMBOL(rdma_resolve_route);
1881
1882static int cma_bind_loopback(struct rdma_id_private *id_priv)
1883{
1884 struct cma_device *cma_dev;
1885 struct ib_port_attr port_attr;
1886 union ib_gid gid;
1887 u16 pkey;
1888 int ret;
1889 u8 p;
1890
1891 mutex_lock(&lock);
1892 if (list_empty(&dev_list)) {
1893 ret = -ENODEV;
1894 goto out;
1895 }
1896 list_for_each_entry(cma_dev, &dev_list, list)
1897 for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p)
1898 if (!ib_query_port(cma_dev->device, p, &port_attr) &&
1899 port_attr.state == IB_PORT_ACTIVE)
1900 goto port_found;
1901
1902 p = 1;
1903 cma_dev = list_entry(dev_list.next, struct cma_device, list);
1904
1905port_found:
1906 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);
1907 if (ret)
1908 goto out;
1909
1910 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
1911 if (ret)
1912 goto out;
1913
1914 id_priv->id.route.addr.dev_addr.dev_type =
1915 (rdma_port_get_link_layer(cma_dev->device, p) == IB_LINK_LAYER_INFINIBAND) ?
1916 ARPHRD_INFINIBAND : ARPHRD_ETHER;
1917
1918 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
1919 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
1920 id_priv->id.port_num = p;
1921 cma_attach_to_dev(id_priv, cma_dev);
1922out:
1923 mutex_unlock(&lock);
1924 return ret;
1925}
1926
1927static void addr_handler(int status, struct sockaddr *src_addr,
1928 struct rdma_dev_addr *dev_addr, void *context)
1929{
1930 struct rdma_id_private *id_priv = context;
1931 struct rdma_cm_event event;
1932
1933 memset(&event, 0, sizeof event);
1934 mutex_lock(&id_priv->handler_mutex);
1935 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
1936 RDMA_CM_ADDR_RESOLVED))
1937 goto out;
1938
1939 if (!status && !id_priv->cma_dev)
1940 status = cma_acquire_dev(id_priv);
1941
1942 if (status) {
1943 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
1944 RDMA_CM_ADDR_BOUND))
1945 goto out;
1946 event.event = RDMA_CM_EVENT_ADDR_ERROR;
1947 event.status = status;
1948 } else {
1949 memcpy(&id_priv->id.route.addr.src_addr, src_addr,
1950 ip_addr_size(src_addr));
1951 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
1952 }
1953
1954 if (id_priv->id.event_handler(&id_priv->id, &event)) {
1955 cma_exch(id_priv, RDMA_CM_DESTROYING);
1956 mutex_unlock(&id_priv->handler_mutex);
1957 cma_deref_id(id_priv);
1958 rdma_destroy_id(&id_priv->id);
1959 return;
1960 }
1961out:
1962 mutex_unlock(&id_priv->handler_mutex);
1963 cma_deref_id(id_priv);
1964}
1965
1966static int cma_resolve_loopback(struct rdma_id_private *id_priv)
1967{
1968 struct cma_work *work;
1969 struct sockaddr *src, *dst;
1970 union ib_gid gid;
1971 int ret;
1972
1973 work = kzalloc(sizeof *work, GFP_KERNEL);
1974 if (!work)
1975 return -ENOMEM;
1976
1977 if (!id_priv->cma_dev) {
1978 ret = cma_bind_loopback(id_priv);
1979 if (ret)
1980 goto err;
1981 }
1982
1983 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
1984 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
1985
1986 src = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
1987 if (cma_zero_addr(src)) {
1988 dst = (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
1989 if ((src->sa_family = dst->sa_family) == AF_INET) {
1990 ((struct sockaddr_in *) src)->sin_addr.s_addr =
1991 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
1992 } else {
1993 ipv6_addr_copy(&((struct sockaddr_in6 *) src)->sin6_addr,
1994 &((struct sockaddr_in6 *) dst)->sin6_addr);
1995 }
1996 }
1997
1998 work->id = id_priv;
1999 INIT_WORK(&work->work, cma_work_handler);
2000 work->old_state = RDMA_CM_ADDR_QUERY;
2001 work->new_state = RDMA_CM_ADDR_RESOLVED;
2002 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2003 queue_work(cma_wq, &work->work);
2004 return 0;
2005err:
2006 kfree(work);
2007 return ret;
2008}
2009
2010static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2011 struct sockaddr *dst_addr)
2012{
2013 if (!src_addr || !src_addr->sa_family) {
2014 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
2015 if ((src_addr->sa_family = dst_addr->sa_family) == AF_INET6) {
2016 ((struct sockaddr_in6 *) src_addr)->sin6_scope_id =
2017 ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id;
2018 }
2019 }
2020 return rdma_bind_addr(id, src_addr);
2021}
2022
2023int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2024 struct sockaddr *dst_addr, int timeout_ms)
2025{
2026 struct rdma_id_private *id_priv;
2027 int ret;
2028
2029 id_priv = container_of(id, struct rdma_id_private, id);
2030 if (id_priv->state == RDMA_CM_IDLE) {
2031 ret = cma_bind_addr(id, src_addr, dst_addr);
2032 if (ret)
2033 return ret;
2034 }
2035
2036 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY))
2037 return -EINVAL;
2038
2039 atomic_inc(&id_priv->refcount);
2040 memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr));
2041 if (cma_any_addr(dst_addr))
2042 ret = cma_resolve_loopback(id_priv);
2043 else
2044 ret = rdma_resolve_ip(&addr_client, (struct sockaddr *) &id->route.addr.src_addr,
2045 dst_addr, &id->route.addr.dev_addr,
2046 timeout_ms, addr_handler, id_priv);
2047 if (ret)
2048 goto err;
2049
2050 return 0;
2051err:
2052 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
2053 cma_deref_id(id_priv);
2054 return ret;
2055}
2056EXPORT_SYMBOL(rdma_resolve_addr);
2057
2058int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
2059{
2060 struct rdma_id_private *id_priv;
2061 unsigned long flags;
2062 int ret;
2063
2064 id_priv = container_of(id, struct rdma_id_private, id);
2065 spin_lock_irqsave(&id_priv->lock, flags);
2066 if (id_priv->state == RDMA_CM_IDLE) {
2067 id_priv->reuseaddr = reuse;
2068 ret = 0;
2069 } else {
2070 ret = -EINVAL;
2071 }
2072 spin_unlock_irqrestore(&id_priv->lock, flags);
2073 return ret;
2074}
2075EXPORT_SYMBOL(rdma_set_reuseaddr);
2076
2077static void cma_bind_port(struct rdma_bind_list *bind_list,
2078 struct rdma_id_private *id_priv)
2079{
2080 struct sockaddr_in *sin;
2081
2082 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
2083 sin->sin_port = htons(bind_list->port);
2084 id_priv->bind_list = bind_list;
2085 hlist_add_head(&id_priv->node, &bind_list->owners);
2086}
2087
2088static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv,
2089 unsigned short snum)
2090{
2091 struct rdma_bind_list *bind_list;
2092 int port, ret;
2093
2094 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
2095 if (!bind_list)
2096 return -ENOMEM;
2097
2098 do {
2099 ret = idr_get_new_above(ps, bind_list, snum, &port);
2100 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
2101
2102 if (ret)
2103 goto err1;
2104
2105 if (port != snum) {
2106 ret = -EADDRNOTAVAIL;
2107 goto err2;
2108 }
2109
2110 bind_list->ps = ps;
2111 bind_list->port = (unsigned short) port;
2112 cma_bind_port(bind_list, id_priv);
2113 return 0;
2114err2:
2115 idr_remove(ps, port);
2116err1:
2117 kfree(bind_list);
2118 return ret;
2119}
2120
2121static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv)
2122{
2123 static unsigned int last_used_port;
2124 int low, high, remaining;
2125 unsigned int rover;
2126
2127 inet_get_local_port_range(&low, &high);
2128 remaining = (high - low) + 1;
2129 rover = net_random() % remaining + low;
2130retry:
2131 if (last_used_port != rover &&
2132 !idr_find(ps, (unsigned short) rover)) {
2133 int ret = cma_alloc_port(ps, id_priv, rover);
2134 /*
2135 * Remember previously used port number in order to avoid
2136 * re-using same port immediately after it is closed.
2137 */
2138 if (!ret)
2139 last_used_port = rover;
2140 if (ret != -EADDRNOTAVAIL)
2141 return ret;
2142 }
2143 if (--remaining) {
2144 rover++;
2145 if ((rover < low) || (rover > high))
2146 rover = low;
2147 goto retry;
2148 }
2149 return -EADDRNOTAVAIL;
2150}
2151
2152/*
2153 * Check that the requested port is available. This is called when trying to
2154 * bind to a specific port, or when trying to listen on a bound port. In
2155 * the latter case, the provided id_priv may already be on the bind_list, but
2156 * we still need to check that it's okay to start listening.
2157 */
2158static int cma_check_port(struct rdma_bind_list *bind_list,
2159 struct rdma_id_private *id_priv, uint8_t reuseaddr)
2160{
2161 struct rdma_id_private *cur_id;
2162 struct sockaddr *addr, *cur_addr;
2163 struct hlist_node *node;
2164
2165 addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
2166 if (cma_any_addr(addr) && !reuseaddr)
2167 return -EADDRNOTAVAIL;
2168
2169 hlist_for_each_entry(cur_id, node, &bind_list->owners, node) {
2170 if (id_priv == cur_id)
2171 continue;
2172
2173 if ((cur_id->state == RDMA_CM_LISTEN) ||
2174 !reuseaddr || !cur_id->reuseaddr) {
2175 cur_addr = (struct sockaddr *) &cur_id->id.route.addr.src_addr;
2176 if (cma_any_addr(cur_addr))
2177 return -EADDRNOTAVAIL;
2178
2179 if (!cma_addr_cmp(addr, cur_addr))
2180 return -EADDRINUSE;
2181 }
2182 }
2183 return 0;
2184}
2185
2186static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv)
2187{
2188 struct rdma_bind_list *bind_list;
2189 unsigned short snum;
2190 int ret;
2191
2192 snum = ntohs(cma_port((struct sockaddr *) &id_priv->id.route.addr.src_addr));
2193 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
2194 return -EACCES;
2195
2196 bind_list = idr_find(ps, snum);
2197 if (!bind_list) {
2198 ret = cma_alloc_port(ps, id_priv, snum);
2199 } else {
2200 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
2201 if (!ret)
2202 cma_bind_port(bind_list, id_priv);
2203 }
2204 return ret;
2205}
2206
2207static int cma_bind_listen(struct rdma_id_private *id_priv)
2208{
2209 struct rdma_bind_list *bind_list = id_priv->bind_list;
2210 int ret = 0;
2211
2212 mutex_lock(&lock);
2213 if (bind_list->owners.first->next)
2214 ret = cma_check_port(bind_list, id_priv, 0);
2215 mutex_unlock(&lock);
2216 return ret;
2217}
2218
2219static int cma_get_port(struct rdma_id_private *id_priv)
2220{
2221 struct idr *ps;
2222 int ret;
2223
2224 switch (id_priv->id.ps) {
2225 case RDMA_PS_SDP:
2226 ps = &sdp_ps;
2227 break;
2228 case RDMA_PS_TCP:
2229 ps = &tcp_ps;
2230 break;
2231 case RDMA_PS_UDP:
2232 ps = &udp_ps;
2233 break;
2234 case RDMA_PS_IPOIB:
2235 ps = &ipoib_ps;
2236 break;
2237 default:
2238 return -EPROTONOSUPPORT;
2239 }
2240
2241 mutex_lock(&lock);
2242 if (cma_any_port((struct sockaddr *) &id_priv->id.route.addr.src_addr))
2243 ret = cma_alloc_any_port(ps, id_priv);
2244 else
2245 ret = cma_use_port(ps, id_priv);
2246 mutex_unlock(&lock);
2247
2248 return ret;
2249}
2250
2251static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
2252 struct sockaddr *addr)
2253{
2254#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2255 struct sockaddr_in6 *sin6;
2256
2257 if (addr->sa_family != AF_INET6)
2258 return 0;
2259
2260 sin6 = (struct sockaddr_in6 *) addr;
2261 if ((ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) &&
2262 !sin6->sin6_scope_id)
2263 return -EINVAL;
2264
2265 dev_addr->bound_dev_if = sin6->sin6_scope_id;
2266#endif
2267 return 0;
2268}
2269
2270int rdma_listen(struct rdma_cm_id *id, int backlog)
2271{
2272 struct rdma_id_private *id_priv;
2273 int ret;
2274
2275 id_priv = container_of(id, struct rdma_id_private, id);
2276 if (id_priv->state == RDMA_CM_IDLE) {
2277 ((struct sockaddr *) &id->route.addr.src_addr)->sa_family = AF_INET;
2278 ret = rdma_bind_addr(id, (struct sockaddr *) &id->route.addr.src_addr);
2279 if (ret)
2280 return ret;
2281 }
2282
2283 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
2284 return -EINVAL;
2285
2286 if (id_priv->reuseaddr) {
2287 ret = cma_bind_listen(id_priv);
2288 if (ret)
2289 goto err;
2290 }
2291
2292 id_priv->backlog = backlog;
2293 if (id->device) {
2294 switch (rdma_node_get_transport(id->device->node_type)) {
2295 case RDMA_TRANSPORT_IB:
2296 ret = cma_ib_listen(id_priv);
2297 if (ret)
2298 goto err;
2299 break;
2300 case RDMA_TRANSPORT_IWARP:
2301 ret = cma_iw_listen(id_priv, backlog);
2302 if (ret)
2303 goto err;
2304 break;
2305 default:
2306 ret = -ENOSYS;
2307 goto err;
2308 }
2309 } else
2310 cma_listen_on_all(id_priv);
2311
2312 return 0;
2313err:
2314 id_priv->backlog = 0;
2315 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
2316 return ret;
2317}
2318EXPORT_SYMBOL(rdma_listen);
2319
2320int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
2321{
2322 struct rdma_id_private *id_priv;
2323 int ret;
2324
2325 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6)
2326 return -EAFNOSUPPORT;
2327
2328 id_priv = container_of(id, struct rdma_id_private, id);
2329 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
2330 return -EINVAL;
2331
2332 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
2333 if (ret)
2334 goto err1;
2335
2336 if (!cma_any_addr(addr)) {
2337 ret = rdma_translate_ip(addr, &id->route.addr.dev_addr);
2338 if (ret)
2339 goto err1;
2340
2341 ret = cma_acquire_dev(id_priv);
2342 if (ret)
2343 goto err1;
2344 }
2345
2346 memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr));
2347 ret = cma_get_port(id_priv);
2348 if (ret)
2349 goto err2;
2350
2351 return 0;
2352err2:
2353 if (id_priv->cma_dev)
2354 cma_release_dev(id_priv);
2355err1:
2356 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
2357 return ret;
2358}
2359EXPORT_SYMBOL(rdma_bind_addr);
2360
2361static int cma_format_hdr(void *hdr, enum rdma_port_space ps,
2362 struct rdma_route *route)
2363{
2364 struct cma_hdr *cma_hdr;
2365 struct sdp_hh *sdp_hdr;
2366
2367 if (route->addr.src_addr.ss_family == AF_INET) {
2368 struct sockaddr_in *src4, *dst4;
2369
2370 src4 = (struct sockaddr_in *) &route->addr.src_addr;
2371 dst4 = (struct sockaddr_in *) &route->addr.dst_addr;
2372
2373 switch (ps) {
2374 case RDMA_PS_SDP:
2375 sdp_hdr = hdr;
2376 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2377 return -EINVAL;
2378 sdp_set_ip_ver(sdp_hdr, 4);
2379 sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2380 sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2381 sdp_hdr->port = src4->sin_port;
2382 break;
2383 default:
2384 cma_hdr = hdr;
2385 cma_hdr->cma_version = CMA_VERSION;
2386 cma_set_ip_ver(cma_hdr, 4);
2387 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2388 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2389 cma_hdr->port = src4->sin_port;
2390 break;
2391 }
2392 } else {
2393 struct sockaddr_in6 *src6, *dst6;
2394
2395 src6 = (struct sockaddr_in6 *) &route->addr.src_addr;
2396 dst6 = (struct sockaddr_in6 *) &route->addr.dst_addr;
2397
2398 switch (ps) {
2399 case RDMA_PS_SDP:
2400 sdp_hdr = hdr;
2401 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2402 return -EINVAL;
2403 sdp_set_ip_ver(sdp_hdr, 6);
2404 sdp_hdr->src_addr.ip6 = src6->sin6_addr;
2405 sdp_hdr->dst_addr.ip6 = dst6->sin6_addr;
2406 sdp_hdr->port = src6->sin6_port;
2407 break;
2408 default:
2409 cma_hdr = hdr;
2410 cma_hdr->cma_version = CMA_VERSION;
2411 cma_set_ip_ver(cma_hdr, 6);
2412 cma_hdr->src_addr.ip6 = src6->sin6_addr;
2413 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
2414 cma_hdr->port = src6->sin6_port;
2415 break;
2416 }
2417 }
2418 return 0;
2419}
2420
2421static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
2422 struct ib_cm_event *ib_event)
2423{
2424 struct rdma_id_private *id_priv = cm_id->context;
2425 struct rdma_cm_event event;
2426 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
2427 int ret = 0;
2428
2429 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
2430 return 0;
2431
2432 memset(&event, 0, sizeof event);
2433 switch (ib_event->event) {
2434 case IB_CM_SIDR_REQ_ERROR:
2435 event.event = RDMA_CM_EVENT_UNREACHABLE;
2436 event.status = -ETIMEDOUT;
2437 break;
2438 case IB_CM_SIDR_REP_RECEIVED:
2439 event.param.ud.private_data = ib_event->private_data;
2440 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
2441 if (rep->status != IB_SIDR_SUCCESS) {
2442 event.event = RDMA_CM_EVENT_UNREACHABLE;
2443 event.status = ib_event->param.sidr_rep_rcvd.status;
2444 break;
2445 }
2446 ret = cma_set_qkey(id_priv);
2447 if (ret) {
2448 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2449 event.status = -EINVAL;
2450 break;
2451 }
2452 if (id_priv->qkey != rep->qkey) {
2453 event.event = RDMA_CM_EVENT_UNREACHABLE;
2454 event.status = -EINVAL;
2455 break;
2456 }
2457 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
2458 id_priv->id.route.path_rec,
2459 &event.param.ud.ah_attr);
2460 event.param.ud.qp_num = rep->qpn;
2461 event.param.ud.qkey = rep->qkey;
2462 event.event = RDMA_CM_EVENT_ESTABLISHED;
2463 event.status = 0;
2464 break;
2465 default:
2466 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
2467 ib_event->event);
2468 goto out;
2469 }
2470
2471 ret = id_priv->id.event_handler(&id_priv->id, &event);
2472 if (ret) {
2473 /* Destroy the CM ID by returning a non-zero value. */
2474 id_priv->cm_id.ib = NULL;
2475 cma_exch(id_priv, RDMA_CM_DESTROYING);
2476 mutex_unlock(&id_priv->handler_mutex);
2477 rdma_destroy_id(&id_priv->id);
2478 return ret;
2479 }
2480out:
2481 mutex_unlock(&id_priv->handler_mutex);
2482 return ret;
2483}
2484
2485static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
2486 struct rdma_conn_param *conn_param)
2487{
2488 struct ib_cm_sidr_req_param req;
2489 struct rdma_route *route;
2490 struct ib_cm_id *id;
2491 int ret;
2492
2493 req.private_data_len = sizeof(struct cma_hdr) +
2494 conn_param->private_data_len;
2495 req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2496 if (!req.private_data)
2497 return -ENOMEM;
2498
2499 if (conn_param->private_data && conn_param->private_data_len)
2500 memcpy((void *) req.private_data + sizeof(struct cma_hdr),
2501 conn_param->private_data, conn_param->private_data_len);
2502
2503 route = &id_priv->id.route;
2504 ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route);
2505 if (ret)
2506 goto out;
2507
2508 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
2509 id_priv);
2510 if (IS_ERR(id)) {
2511 ret = PTR_ERR(id);
2512 goto out;
2513 }
2514 id_priv->cm_id.ib = id;
2515
2516 req.path = route->path_rec;
2517 req.service_id = cma_get_service_id(id_priv->id.ps,
2518 (struct sockaddr *) &route->addr.dst_addr);
2519 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
2520 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2521
2522 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
2523 if (ret) {
2524 ib_destroy_cm_id(id_priv->cm_id.ib);
2525 id_priv->cm_id.ib = NULL;
2526 }
2527out:
2528 kfree(req.private_data);
2529 return ret;
2530}
2531
2532static int cma_connect_ib(struct rdma_id_private *id_priv,
2533 struct rdma_conn_param *conn_param)
2534{
2535 struct ib_cm_req_param req;
2536 struct rdma_route *route;
2537 void *private_data;
2538 struct ib_cm_id *id;
2539 int offset, ret;
2540
2541 memset(&req, 0, sizeof req);
2542 offset = cma_user_data_offset(id_priv->id.ps);
2543 req.private_data_len = offset + conn_param->private_data_len;
2544 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2545 if (!private_data)
2546 return -ENOMEM;
2547
2548 if (conn_param->private_data && conn_param->private_data_len)
2549 memcpy(private_data + offset, conn_param->private_data,
2550 conn_param->private_data_len);
2551
2552 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
2553 if (IS_ERR(id)) {
2554 ret = PTR_ERR(id);
2555 goto out;
2556 }
2557 id_priv->cm_id.ib = id;
2558
2559 route = &id_priv->id.route;
2560 ret = cma_format_hdr(private_data, id_priv->id.ps, route);
2561 if (ret)
2562 goto out;
2563 req.private_data = private_data;
2564
2565 req.primary_path = &route->path_rec[0];
2566 if (route->num_paths == 2)
2567 req.alternate_path = &route->path_rec[1];
2568
2569 req.service_id = cma_get_service_id(id_priv->id.ps,
2570 (struct sockaddr *) &route->addr.dst_addr);
2571 req.qp_num = id_priv->qp_num;
2572 req.qp_type = IB_QPT_RC;
2573 req.starting_psn = id_priv->seq_num;
2574 req.responder_resources = conn_param->responder_resources;
2575 req.initiator_depth = conn_param->initiator_depth;
2576 req.flow_control = conn_param->flow_control;
2577 req.retry_count = conn_param->retry_count;
2578 req.rnr_retry_count = conn_param->rnr_retry_count;
2579 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2580 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2581 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2582 req.srq = id_priv->srq ? 1 : 0;
2583
2584 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
2585out:
2586 if (ret && !IS_ERR(id)) {
2587 ib_destroy_cm_id(id);
2588 id_priv->cm_id.ib = NULL;
2589 }
2590
2591 kfree(private_data);
2592 return ret;
2593}
2594
2595static int cma_connect_iw(struct rdma_id_private *id_priv,
2596 struct rdma_conn_param *conn_param)
2597{
2598 struct iw_cm_id *cm_id;
2599 struct sockaddr_in* sin;
2600 int ret;
2601 struct iw_cm_conn_param iw_param;
2602
2603 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
2604 if (IS_ERR(cm_id))
2605 return PTR_ERR(cm_id);
2606
2607 id_priv->cm_id.iw = cm_id;
2608
2609 sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr;
2610 cm_id->local_addr = *sin;
2611
2612 sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr;
2613 cm_id->remote_addr = *sin;
2614
2615 ret = cma_modify_qp_rtr(id_priv, conn_param);
2616 if (ret)
2617 goto out;
2618
2619 iw_param.ord = conn_param->initiator_depth;
2620 iw_param.ird = conn_param->responder_resources;
2621 iw_param.private_data = conn_param->private_data;
2622 iw_param.private_data_len = conn_param->private_data_len;
2623 if (id_priv->id.qp)
2624 iw_param.qpn = id_priv->qp_num;
2625 else
2626 iw_param.qpn = conn_param->qp_num;
2627 ret = iw_cm_connect(cm_id, &iw_param);
2628out:
2629 if (ret) {
2630 iw_destroy_cm_id(cm_id);
2631 id_priv->cm_id.iw = NULL;
2632 }
2633 return ret;
2634}
2635
2636int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2637{
2638 struct rdma_id_private *id_priv;
2639 int ret;
2640
2641 id_priv = container_of(id, struct rdma_id_private, id);
2642 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
2643 return -EINVAL;
2644
2645 if (!id->qp) {
2646 id_priv->qp_num = conn_param->qp_num;
2647 id_priv->srq = conn_param->srq;
2648 }
2649
2650 switch (rdma_node_get_transport(id->device->node_type)) {
2651 case RDMA_TRANSPORT_IB:
2652 if (id->qp_type == IB_QPT_UD)
2653 ret = cma_resolve_ib_udp(id_priv, conn_param);
2654 else
2655 ret = cma_connect_ib(id_priv, conn_param);
2656 break;
2657 case RDMA_TRANSPORT_IWARP:
2658 ret = cma_connect_iw(id_priv, conn_param);
2659 break;
2660 default:
2661 ret = -ENOSYS;
2662 break;
2663 }
2664 if (ret)
2665 goto err;
2666
2667 return 0;
2668err:
2669 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
2670 return ret;
2671}
2672EXPORT_SYMBOL(rdma_connect);
2673
2674static int cma_accept_ib(struct rdma_id_private *id_priv,
2675 struct rdma_conn_param *conn_param)
2676{
2677 struct ib_cm_rep_param rep;
2678 int ret;
2679
2680 ret = cma_modify_qp_rtr(id_priv, conn_param);
2681 if (ret)
2682 goto out;
2683
2684 ret = cma_modify_qp_rts(id_priv, conn_param);
2685 if (ret)
2686 goto out;
2687
2688 memset(&rep, 0, sizeof rep);
2689 rep.qp_num = id_priv->qp_num;
2690 rep.starting_psn = id_priv->seq_num;
2691 rep.private_data = conn_param->private_data;
2692 rep.private_data_len = conn_param->private_data_len;
2693 rep.responder_resources = conn_param->responder_resources;
2694 rep.initiator_depth = conn_param->initiator_depth;
2695 rep.failover_accepted = 0;
2696 rep.flow_control = conn_param->flow_control;
2697 rep.rnr_retry_count = conn_param->rnr_retry_count;
2698 rep.srq = id_priv->srq ? 1 : 0;
2699
2700 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
2701out:
2702 return ret;
2703}
2704
2705static int cma_accept_iw(struct rdma_id_private *id_priv,
2706 struct rdma_conn_param *conn_param)
2707{
2708 struct iw_cm_conn_param iw_param;
2709 int ret;
2710
2711 ret = cma_modify_qp_rtr(id_priv, conn_param);
2712 if (ret)
2713 return ret;
2714
2715 iw_param.ord = conn_param->initiator_depth;
2716 iw_param.ird = conn_param->responder_resources;
2717 iw_param.private_data = conn_param->private_data;
2718 iw_param.private_data_len = conn_param->private_data_len;
2719 if (id_priv->id.qp) {
2720 iw_param.qpn = id_priv->qp_num;
2721 } else
2722 iw_param.qpn = conn_param->qp_num;
2723
2724 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
2725}
2726
2727static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
2728 enum ib_cm_sidr_status status,
2729 const void *private_data, int private_data_len)
2730{
2731 struct ib_cm_sidr_rep_param rep;
2732 int ret;
2733
2734 memset(&rep, 0, sizeof rep);
2735 rep.status = status;
2736 if (status == IB_SIDR_SUCCESS) {
2737 ret = cma_set_qkey(id_priv);
2738 if (ret)
2739 return ret;
2740 rep.qp_num = id_priv->qp_num;
2741 rep.qkey = id_priv->qkey;
2742 }
2743 rep.private_data = private_data;
2744 rep.private_data_len = private_data_len;
2745
2746 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
2747}
2748
2749int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2750{
2751 struct rdma_id_private *id_priv;
2752 int ret;
2753
2754 id_priv = container_of(id, struct rdma_id_private, id);
2755
2756 id_priv->owner = task_pid_nr(current);
2757
2758 if (!cma_comp(id_priv, RDMA_CM_CONNECT))
2759 return -EINVAL;
2760
2761 if (!id->qp && conn_param) {
2762 id_priv->qp_num = conn_param->qp_num;
2763 id_priv->srq = conn_param->srq;
2764 }
2765
2766 switch (rdma_node_get_transport(id->device->node_type)) {
2767 case RDMA_TRANSPORT_IB:
2768 if (id->qp_type == IB_QPT_UD)
2769 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
2770 conn_param->private_data,
2771 conn_param->private_data_len);
2772 else if (conn_param)
2773 ret = cma_accept_ib(id_priv, conn_param);
2774 else
2775 ret = cma_rep_recv(id_priv);
2776 break;
2777 case RDMA_TRANSPORT_IWARP:
2778 ret = cma_accept_iw(id_priv, conn_param);
2779 break;
2780 default:
2781 ret = -ENOSYS;
2782 break;
2783 }
2784
2785 if (ret)
2786 goto reject;
2787
2788 return 0;
2789reject:
2790 cma_modify_qp_err(id_priv);
2791 rdma_reject(id, NULL, 0);
2792 return ret;
2793}
2794EXPORT_SYMBOL(rdma_accept);
2795
2796int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
2797{
2798 struct rdma_id_private *id_priv;
2799 int ret;
2800
2801 id_priv = container_of(id, struct rdma_id_private, id);
2802 if (!id_priv->cm_id.ib)
2803 return -EINVAL;
2804
2805 switch (id->device->node_type) {
2806 case RDMA_NODE_IB_CA:
2807 ret = ib_cm_notify(id_priv->cm_id.ib, event);
2808 break;
2809 default:
2810 ret = 0;
2811 break;
2812 }
2813 return ret;
2814}
2815EXPORT_SYMBOL(rdma_notify);
2816
2817int rdma_reject(struct rdma_cm_id *id, const void *private_data,
2818 u8 private_data_len)
2819{
2820 struct rdma_id_private *id_priv;
2821 int ret;
2822
2823 id_priv = container_of(id, struct rdma_id_private, id);
2824 if (!id_priv->cm_id.ib)
2825 return -EINVAL;
2826
2827 switch (rdma_node_get_transport(id->device->node_type)) {
2828 case RDMA_TRANSPORT_IB:
2829 if (id->qp_type == IB_QPT_UD)
2830 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT,
2831 private_data, private_data_len);
2832 else
2833 ret = ib_send_cm_rej(id_priv->cm_id.ib,
2834 IB_CM_REJ_CONSUMER_DEFINED, NULL,
2835 0, private_data, private_data_len);
2836 break;
2837 case RDMA_TRANSPORT_IWARP:
2838 ret = iw_cm_reject(id_priv->cm_id.iw,
2839 private_data, private_data_len);
2840 break;
2841 default:
2842 ret = -ENOSYS;
2843 break;
2844 }
2845 return ret;
2846}
2847EXPORT_SYMBOL(rdma_reject);
2848
2849int rdma_disconnect(struct rdma_cm_id *id)
2850{
2851 struct rdma_id_private *id_priv;
2852 int ret;
2853
2854 id_priv = container_of(id, struct rdma_id_private, id);
2855 if (!id_priv->cm_id.ib)
2856 return -EINVAL;
2857
2858 switch (rdma_node_get_transport(id->device->node_type)) {
2859 case RDMA_TRANSPORT_IB:
2860 ret = cma_modify_qp_err(id_priv);
2861 if (ret)
2862 goto out;
2863 /* Initiate or respond to a disconnect. */
2864 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
2865 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
2866 break;
2867 case RDMA_TRANSPORT_IWARP:
2868 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
2869 break;
2870 default:
2871 ret = -EINVAL;
2872 break;
2873 }
2874out:
2875 return ret;
2876}
2877EXPORT_SYMBOL(rdma_disconnect);
2878
2879static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
2880{
2881 struct rdma_id_private *id_priv;
2882 struct cma_multicast *mc = multicast->context;
2883 struct rdma_cm_event event;
2884 int ret;
2885
2886 id_priv = mc->id_priv;
2887 if (cma_disable_callback(id_priv, RDMA_CM_ADDR_BOUND) &&
2888 cma_disable_callback(id_priv, RDMA_CM_ADDR_RESOLVED))
2889 return 0;
2890
2891 mutex_lock(&id_priv->qp_mutex);
2892 if (!status && id_priv->id.qp)
2893 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
2894 multicast->rec.mlid);
2895 mutex_unlock(&id_priv->qp_mutex);
2896
2897 memset(&event, 0, sizeof event);
2898 event.status = status;
2899 event.param.ud.private_data = mc->context;
2900 if (!status) {
2901 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
2902 ib_init_ah_from_mcmember(id_priv->id.device,
2903 id_priv->id.port_num, &multicast->rec,
2904 &event.param.ud.ah_attr);
2905 event.param.ud.qp_num = 0xFFFFFF;
2906 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
2907 } else
2908 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
2909
2910 ret = id_priv->id.event_handler(&id_priv->id, &event);
2911 if (ret) {
2912 cma_exch(id_priv, RDMA_CM_DESTROYING);
2913 mutex_unlock(&id_priv->handler_mutex);
2914 rdma_destroy_id(&id_priv->id);
2915 return 0;
2916 }
2917
2918 mutex_unlock(&id_priv->handler_mutex);
2919 return 0;
2920}
2921
2922static void cma_set_mgid(struct rdma_id_private *id_priv,
2923 struct sockaddr *addr, union ib_gid *mgid)
2924{
2925 unsigned char mc_map[MAX_ADDR_LEN];
2926 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2927 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
2928 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
2929
2930 if (cma_any_addr(addr)) {
2931 memset(mgid, 0, sizeof *mgid);
2932 } else if ((addr->sa_family == AF_INET6) &&
2933 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
2934 0xFF10A01B)) {
2935 /* IPv6 address is an SA assigned MGID. */
2936 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
2937 } else if ((addr->sa_family == AF_INET6)) {
2938 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
2939 if (id_priv->id.ps == RDMA_PS_UDP)
2940 mc_map[7] = 0x01; /* Use RDMA CM signature */
2941 *mgid = *(union ib_gid *) (mc_map + 4);
2942 } else {
2943 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
2944 if (id_priv->id.ps == RDMA_PS_UDP)
2945 mc_map[7] = 0x01; /* Use RDMA CM signature */
2946 *mgid = *(union ib_gid *) (mc_map + 4);
2947 }
2948}
2949
2950static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
2951 struct cma_multicast *mc)
2952{
2953 struct ib_sa_mcmember_rec rec;
2954 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2955 ib_sa_comp_mask comp_mask;
2956 int ret;
2957
2958 ib_addr_get_mgid(dev_addr, &rec.mgid);
2959 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
2960 &rec.mgid, &rec);
2961 if (ret)
2962 return ret;
2963
2964 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
2965 if (id_priv->id.ps == RDMA_PS_UDP)
2966 rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
2967 rdma_addr_get_sgid(dev_addr, &rec.port_gid);
2968 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
2969 rec.join_state = 1;
2970
2971 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
2972 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
2973 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
2974 IB_SA_MCMEMBER_REC_FLOW_LABEL |
2975 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
2976
2977 if (id_priv->id.ps == RDMA_PS_IPOIB)
2978 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
2979 IB_SA_MCMEMBER_REC_RATE_SELECTOR;
2980
2981 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
2982 id_priv->id.port_num, &rec,
2983 comp_mask, GFP_KERNEL,
2984 cma_ib_mc_handler, mc);
2985 if (IS_ERR(mc->multicast.ib))
2986 return PTR_ERR(mc->multicast.ib);
2987
2988 return 0;
2989}
2990
2991static void iboe_mcast_work_handler(struct work_struct *work)
2992{
2993 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
2994 struct cma_multicast *mc = mw->mc;
2995 struct ib_sa_multicast *m = mc->multicast.ib;
2996
2997 mc->multicast.ib->context = mc;
2998 cma_ib_mc_handler(0, m);
2999 kref_put(&mc->mcref, release_mc);
3000 kfree(mw);
3001}
3002
3003static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid)
3004{
3005 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
3006 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
3007
3008 if (cma_any_addr(addr)) {
3009 memset(mgid, 0, sizeof *mgid);
3010 } else if (addr->sa_family == AF_INET6) {
3011 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3012 } else {
3013 mgid->raw[0] = 0xff;
3014 mgid->raw[1] = 0x0e;
3015 mgid->raw[2] = 0;
3016 mgid->raw[3] = 0;
3017 mgid->raw[4] = 0;
3018 mgid->raw[5] = 0;
3019 mgid->raw[6] = 0;
3020 mgid->raw[7] = 0;
3021 mgid->raw[8] = 0;
3022 mgid->raw[9] = 0;
3023 mgid->raw[10] = 0xff;
3024 mgid->raw[11] = 0xff;
3025 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
3026 }
3027}
3028
3029static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
3030 struct cma_multicast *mc)
3031{
3032 struct iboe_mcast_work *work;
3033 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3034 int err;
3035 struct sockaddr *addr = (struct sockaddr *)&mc->addr;
3036 struct net_device *ndev = NULL;
3037
3038 if (cma_zero_addr((struct sockaddr *)&mc->addr))
3039 return -EINVAL;
3040
3041 work = kzalloc(sizeof *work, GFP_KERNEL);
3042 if (!work)
3043 return -ENOMEM;
3044
3045 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
3046 if (!mc->multicast.ib) {
3047 err = -ENOMEM;
3048 goto out1;
3049 }
3050
3051 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid);
3052
3053 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
3054 if (id_priv->id.ps == RDMA_PS_UDP)
3055 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
3056
3057 if (dev_addr->bound_dev_if)
3058 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
3059 if (!ndev) {
3060 err = -ENODEV;
3061 goto out2;
3062 }
3063 mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
3064 mc->multicast.ib->rec.hop_limit = 1;
3065 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
3066 dev_put(ndev);
3067 if (!mc->multicast.ib->rec.mtu) {
3068 err = -EINVAL;
3069 goto out2;
3070 }
3071 iboe_addr_get_sgid(dev_addr, &mc->multicast.ib->rec.port_gid);
3072 work->id = id_priv;
3073 work->mc = mc;
3074 INIT_WORK(&work->work, iboe_mcast_work_handler);
3075 kref_get(&mc->mcref);
3076 queue_work(cma_wq, &work->work);
3077
3078 return 0;
3079
3080out2:
3081 kfree(mc->multicast.ib);
3082out1:
3083 kfree(work);
3084 return err;
3085}
3086
3087int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
3088 void *context)
3089{
3090 struct rdma_id_private *id_priv;
3091 struct cma_multicast *mc;
3092 int ret;
3093
3094 id_priv = container_of(id, struct rdma_id_private, id);
3095 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
3096 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
3097 return -EINVAL;
3098
3099 mc = kmalloc(sizeof *mc, GFP_KERNEL);
3100 if (!mc)
3101 return -ENOMEM;
3102
3103 memcpy(&mc->addr, addr, ip_addr_size(addr));
3104 mc->context = context;
3105 mc->id_priv = id_priv;
3106
3107 spin_lock(&id_priv->lock);
3108 list_add(&mc->list, &id_priv->mc_list);
3109 spin_unlock(&id_priv->lock);
3110
3111 switch (rdma_node_get_transport(id->device->node_type)) {
3112 case RDMA_TRANSPORT_IB:
3113 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3114 case IB_LINK_LAYER_INFINIBAND:
3115 ret = cma_join_ib_multicast(id_priv, mc);
3116 break;
3117 case IB_LINK_LAYER_ETHERNET:
3118 kref_init(&mc->mcref);
3119 ret = cma_iboe_join_multicast(id_priv, mc);
3120 break;
3121 default:
3122 ret = -EINVAL;
3123 }
3124 break;
3125 default:
3126 ret = -ENOSYS;
3127 break;
3128 }
3129
3130 if (ret) {
3131 spin_lock_irq(&id_priv->lock);
3132 list_del(&mc->list);
3133 spin_unlock_irq(&id_priv->lock);
3134 kfree(mc);
3135 }
3136 return ret;
3137}
3138EXPORT_SYMBOL(rdma_join_multicast);
3139
3140void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
3141{
3142 struct rdma_id_private *id_priv;
3143 struct cma_multicast *mc;
3144
3145 id_priv = container_of(id, struct rdma_id_private, id);
3146 spin_lock_irq(&id_priv->lock);
3147 list_for_each_entry(mc, &id_priv->mc_list, list) {
3148 if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) {
3149 list_del(&mc->list);
3150 spin_unlock_irq(&id_priv->lock);
3151
3152 if (id->qp)
3153 ib_detach_mcast(id->qp,
3154 &mc->multicast.ib->rec.mgid,
3155 mc->multicast.ib->rec.mlid);
3156 if (rdma_node_get_transport(id_priv->cma_dev->device->node_type) == RDMA_TRANSPORT_IB) {
3157 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3158 case IB_LINK_LAYER_INFINIBAND:
3159 ib_sa_free_multicast(mc->multicast.ib);
3160 kfree(mc);
3161 break;
3162 case IB_LINK_LAYER_ETHERNET:
3163 kref_put(&mc->mcref, release_mc);
3164 break;
3165 default:
3166 break;
3167 }
3168 }
3169 return;
3170 }
3171 }
3172 spin_unlock_irq(&id_priv->lock);
3173}
3174EXPORT_SYMBOL(rdma_leave_multicast);
3175
3176static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
3177{
3178 struct rdma_dev_addr *dev_addr;
3179 struct cma_ndev_work *work;
3180
3181 dev_addr = &id_priv->id.route.addr.dev_addr;
3182
3183 if ((dev_addr->bound_dev_if == ndev->ifindex) &&
3184 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
3185 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n",
3186 ndev->name, &id_priv->id);
3187 work = kzalloc(sizeof *work, GFP_KERNEL);
3188 if (!work)
3189 return -ENOMEM;
3190
3191 INIT_WORK(&work->work, cma_ndev_work_handler);
3192 work->id = id_priv;
3193 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
3194 atomic_inc(&id_priv->refcount);
3195 queue_work(cma_wq, &work->work);
3196 }
3197
3198 return 0;
3199}
3200
3201static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
3202 void *ctx)
3203{
3204 struct net_device *ndev = (struct net_device *)ctx;
3205 struct cma_device *cma_dev;
3206 struct rdma_id_private *id_priv;
3207 int ret = NOTIFY_DONE;
3208
3209 if (dev_net(ndev) != &init_net)
3210 return NOTIFY_DONE;
3211
3212 if (event != NETDEV_BONDING_FAILOVER)
3213 return NOTIFY_DONE;
3214
3215 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
3216 return NOTIFY_DONE;
3217
3218 mutex_lock(&lock);
3219 list_for_each_entry(cma_dev, &dev_list, list)
3220 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3221 ret = cma_netdev_change(ndev, id_priv);
3222 if (ret)
3223 goto out;
3224 }
3225
3226out:
3227 mutex_unlock(&lock);
3228 return ret;
3229}
3230
3231static struct notifier_block cma_nb = {
3232 .notifier_call = cma_netdev_callback
3233};
3234
3235static void cma_add_one(struct ib_device *device)
3236{
3237 struct cma_device *cma_dev;
3238 struct rdma_id_private *id_priv;
3239
3240 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
3241 if (!cma_dev)
3242 return;
3243
3244 cma_dev->device = device;
3245
3246 init_completion(&cma_dev->comp);
3247 atomic_set(&cma_dev->refcount, 1);
3248 INIT_LIST_HEAD(&cma_dev->id_list);
3249 ib_set_client_data(device, &cma_client, cma_dev);
3250
3251 mutex_lock(&lock);
3252 list_add_tail(&cma_dev->list, &dev_list);
3253 list_for_each_entry(id_priv, &listen_any_list, list)
3254 cma_listen_on_dev(id_priv, cma_dev);
3255 mutex_unlock(&lock);
3256}
3257
3258static int cma_remove_id_dev(struct rdma_id_private *id_priv)
3259{
3260 struct rdma_cm_event event;
3261 enum rdma_cm_state state;
3262 int ret = 0;
3263
3264 /* Record that we want to remove the device */
3265 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
3266 if (state == RDMA_CM_DESTROYING)
3267 return 0;
3268
3269 cma_cancel_operation(id_priv, state);
3270 mutex_lock(&id_priv->handler_mutex);
3271
3272 /* Check for destruction from another callback. */
3273 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
3274 goto out;
3275
3276 memset(&event, 0, sizeof event);
3277 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
3278 ret = id_priv->id.event_handler(&id_priv->id, &event);
3279out:
3280 mutex_unlock(&id_priv->handler_mutex);
3281 return ret;
3282}
3283
3284static void cma_process_remove(struct cma_device *cma_dev)
3285{
3286 struct rdma_id_private *id_priv;
3287 int ret;
3288
3289 mutex_lock(&lock);
3290 while (!list_empty(&cma_dev->id_list)) {
3291 id_priv = list_entry(cma_dev->id_list.next,
3292 struct rdma_id_private, list);
3293
3294 list_del(&id_priv->listen_list);
3295 list_del_init(&id_priv->list);
3296 atomic_inc(&id_priv->refcount);
3297 mutex_unlock(&lock);
3298
3299 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
3300 cma_deref_id(id_priv);
3301 if (ret)
3302 rdma_destroy_id(&id_priv->id);
3303
3304 mutex_lock(&lock);
3305 }
3306 mutex_unlock(&lock);
3307
3308 cma_deref_dev(cma_dev);
3309 wait_for_completion(&cma_dev->comp);
3310}
3311
3312static void cma_remove_one(struct ib_device *device)
3313{
3314 struct cma_device *cma_dev;
3315
3316 cma_dev = ib_get_client_data(device, &cma_client);
3317 if (!cma_dev)
3318 return;
3319
3320 mutex_lock(&lock);
3321 list_del(&cma_dev->list);
3322 mutex_unlock(&lock);
3323
3324 cma_process_remove(cma_dev);
3325 kfree(cma_dev);
3326}
3327
3328static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb)
3329{
3330 struct nlmsghdr *nlh;
3331 struct rdma_cm_id_stats *id_stats;
3332 struct rdma_id_private *id_priv;
3333 struct rdma_cm_id *id = NULL;
3334 struct cma_device *cma_dev;
3335 int i_dev = 0, i_id = 0;
3336
3337 /*
3338 * We export all of the IDs as a sequence of messages. Each
3339 * ID gets its own netlink message.
3340 */
3341 mutex_lock(&lock);
3342
3343 list_for_each_entry(cma_dev, &dev_list, list) {
3344 if (i_dev < cb->args[0]) {
3345 i_dev++;
3346 continue;
3347 }
3348
3349 i_id = 0;
3350 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3351 if (i_id < cb->args[1]) {
3352 i_id++;
3353 continue;
3354 }
3355
3356 id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq,
3357 sizeof *id_stats, RDMA_NL_RDMA_CM,
3358 RDMA_NL_RDMA_CM_ID_STATS);
3359 if (!id_stats)
3360 goto out;
3361
3362 memset(id_stats, 0, sizeof *id_stats);
3363 id = &id_priv->id;
3364 id_stats->node_type = id->route.addr.dev_addr.dev_type;
3365 id_stats->port_num = id->port_num;
3366 id_stats->bound_dev_if =
3367 id->route.addr.dev_addr.bound_dev_if;
3368
3369 if (id->route.addr.src_addr.ss_family == AF_INET) {
3370 if (ibnl_put_attr(skb, nlh,
3371 sizeof(struct sockaddr_in),
3372 &id->route.addr.src_addr,
3373 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR)) {
3374 goto out;
3375 }
3376 if (ibnl_put_attr(skb, nlh,
3377 sizeof(struct sockaddr_in),
3378 &id->route.addr.dst_addr,
3379 RDMA_NL_RDMA_CM_ATTR_DST_ADDR)) {
3380 goto out;
3381 }
3382 } else if (id->route.addr.src_addr.ss_family == AF_INET6) {
3383 if (ibnl_put_attr(skb, nlh,
3384 sizeof(struct sockaddr_in6),
3385 &id->route.addr.src_addr,
3386 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR)) {
3387 goto out;
3388 }
3389 if (ibnl_put_attr(skb, nlh,
3390 sizeof(struct sockaddr_in6),
3391 &id->route.addr.dst_addr,
3392 RDMA_NL_RDMA_CM_ATTR_DST_ADDR)) {
3393 goto out;
3394 }
3395 }
3396
3397 id_stats->pid = id_priv->owner;
3398 id_stats->port_space = id->ps;
3399 id_stats->cm_state = id_priv->state;
3400 id_stats->qp_num = id_priv->qp_num;
3401 id_stats->qp_type = id->qp_type;
3402
3403 i_id++;
3404 }
3405
3406 cb->args[1] = 0;
3407 i_dev++;
3408 }
3409
3410out:
3411 mutex_unlock(&lock);
3412 cb->args[0] = i_dev;
3413 cb->args[1] = i_id;
3414
3415 return skb->len;
3416}
3417
3418static const struct ibnl_client_cbs cma_cb_table[] = {
3419 [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats },
3420};
3421
3422static int __init cma_init(void)
3423{
3424 int ret;
3425
3426 cma_wq = create_singlethread_workqueue("rdma_cm");
3427 if (!cma_wq)
3428 return -ENOMEM;
3429
3430 ib_sa_register_client(&sa_client);
3431 rdma_addr_register_client(&addr_client);
3432 register_netdevice_notifier(&cma_nb);
3433
3434 ret = ib_register_client(&cma_client);
3435 if (ret)
3436 goto err;
3437
3438 if (ibnl_add_client(RDMA_NL_RDMA_CM, RDMA_NL_RDMA_CM_NUM_OPS, cma_cb_table))
3439 printk(KERN_WARNING "RDMA CMA: failed to add netlink callback\n");
3440
3441 return 0;
3442
3443err:
3444 unregister_netdevice_notifier(&cma_nb);
3445 rdma_addr_unregister_client(&addr_client);
3446 ib_sa_unregister_client(&sa_client);
3447 destroy_workqueue(cma_wq);
3448 return ret;
3449}
3450
3451static void __exit cma_cleanup(void)
3452{
3453 ibnl_remove_client(RDMA_NL_RDMA_CM);
3454 ib_unregister_client(&cma_client);
3455 unregister_netdevice_notifier(&cma_nb);
3456 rdma_addr_unregister_client(&addr_client);
3457 ib_sa_unregister_client(&sa_client);
3458 destroy_workqueue(cma_wq);
3459 idr_destroy(&sdp_ps);
3460 idr_destroy(&tcp_ps);
3461 idr_destroy(&udp_ps);
3462 idr_destroy(&ipoib_ps);
3463}
3464
3465module_init(cma_init);
3466module_exit(cma_cleanup);
1/*
2 * Copyright (c) 2005 Voltaire Inc. All rights reserved.
3 * Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved.
4 * Copyright (c) 1999-2005, Mellanox Technologies, Inc. All rights reserved.
5 * Copyright (c) 2005-2006 Intel Corporation. All rights reserved.
6 *
7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
12 *
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
15 * conditions are met:
16 *
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
19 * disclaimer.
20 *
21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
25 *
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 * SOFTWARE.
34 */
35
36#include <linux/completion.h>
37#include <linux/in.h>
38#include <linux/in6.h>
39#include <linux/mutex.h>
40#include <linux/random.h>
41#include <linux/igmp.h>
42#include <linux/xarray.h>
43#include <linux/inetdevice.h>
44#include <linux/slab.h>
45#include <linux/module.h>
46#include <net/route.h>
47
48#include <net/net_namespace.h>
49#include <net/netns/generic.h>
50#include <net/tcp.h>
51#include <net/ipv6.h>
52#include <net/ip_fib.h>
53#include <net/ip6_route.h>
54
55#include <rdma/rdma_cm.h>
56#include <rdma/rdma_cm_ib.h>
57#include <rdma/rdma_netlink.h>
58#include <rdma/ib.h>
59#include <rdma/ib_cache.h>
60#include <rdma/ib_cm.h>
61#include <rdma/ib_sa.h>
62#include <rdma/iw_cm.h>
63
64#include "core_priv.h"
65#include "cma_priv.h"
66
67MODULE_AUTHOR("Sean Hefty");
68MODULE_DESCRIPTION("Generic RDMA CM Agent");
69MODULE_LICENSE("Dual BSD/GPL");
70
71#define CMA_CM_RESPONSE_TIMEOUT 20
72#define CMA_QUERY_CLASSPORT_INFO_TIMEOUT 3000
73#define CMA_MAX_CM_RETRIES 15
74#define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
75#define CMA_IBOE_PACKET_LIFETIME 18
76#define CMA_PREFERRED_ROCE_GID_TYPE IB_GID_TYPE_ROCE_UDP_ENCAP
77
78static const char * const cma_events[] = {
79 [RDMA_CM_EVENT_ADDR_RESOLVED] = "address resolved",
80 [RDMA_CM_EVENT_ADDR_ERROR] = "address error",
81 [RDMA_CM_EVENT_ROUTE_RESOLVED] = "route resolved ",
82 [RDMA_CM_EVENT_ROUTE_ERROR] = "route error",
83 [RDMA_CM_EVENT_CONNECT_REQUEST] = "connect request",
84 [RDMA_CM_EVENT_CONNECT_RESPONSE] = "connect response",
85 [RDMA_CM_EVENT_CONNECT_ERROR] = "connect error",
86 [RDMA_CM_EVENT_UNREACHABLE] = "unreachable",
87 [RDMA_CM_EVENT_REJECTED] = "rejected",
88 [RDMA_CM_EVENT_ESTABLISHED] = "established",
89 [RDMA_CM_EVENT_DISCONNECTED] = "disconnected",
90 [RDMA_CM_EVENT_DEVICE_REMOVAL] = "device removal",
91 [RDMA_CM_EVENT_MULTICAST_JOIN] = "multicast join",
92 [RDMA_CM_EVENT_MULTICAST_ERROR] = "multicast error",
93 [RDMA_CM_EVENT_ADDR_CHANGE] = "address change",
94 [RDMA_CM_EVENT_TIMEWAIT_EXIT] = "timewait exit",
95};
96
97const char *__attribute_const__ rdma_event_msg(enum rdma_cm_event_type event)
98{
99 size_t index = event;
100
101 return (index < ARRAY_SIZE(cma_events) && cma_events[index]) ?
102 cma_events[index] : "unrecognized event";
103}
104EXPORT_SYMBOL(rdma_event_msg);
105
106const char *__attribute_const__ rdma_reject_msg(struct rdma_cm_id *id,
107 int reason)
108{
109 if (rdma_ib_or_roce(id->device, id->port_num))
110 return ibcm_reject_msg(reason);
111
112 if (rdma_protocol_iwarp(id->device, id->port_num))
113 return iwcm_reject_msg(reason);
114
115 WARN_ON_ONCE(1);
116 return "unrecognized transport";
117}
118EXPORT_SYMBOL(rdma_reject_msg);
119
120bool rdma_is_consumer_reject(struct rdma_cm_id *id, int reason)
121{
122 if (rdma_ib_or_roce(id->device, id->port_num))
123 return reason == IB_CM_REJ_CONSUMER_DEFINED;
124
125 if (rdma_protocol_iwarp(id->device, id->port_num))
126 return reason == -ECONNREFUSED;
127
128 WARN_ON_ONCE(1);
129 return false;
130}
131EXPORT_SYMBOL(rdma_is_consumer_reject);
132
133const void *rdma_consumer_reject_data(struct rdma_cm_id *id,
134 struct rdma_cm_event *ev, u8 *data_len)
135{
136 const void *p;
137
138 if (rdma_is_consumer_reject(id, ev->status)) {
139 *data_len = ev->param.conn.private_data_len;
140 p = ev->param.conn.private_data;
141 } else {
142 *data_len = 0;
143 p = NULL;
144 }
145 return p;
146}
147EXPORT_SYMBOL(rdma_consumer_reject_data);
148
149/**
150 * rdma_iw_cm_id() - return the iw_cm_id pointer for this cm_id.
151 * @id: Communication Identifier
152 */
153struct iw_cm_id *rdma_iw_cm_id(struct rdma_cm_id *id)
154{
155 struct rdma_id_private *id_priv;
156
157 id_priv = container_of(id, struct rdma_id_private, id);
158 if (id->device->node_type == RDMA_NODE_RNIC)
159 return id_priv->cm_id.iw;
160 return NULL;
161}
162EXPORT_SYMBOL(rdma_iw_cm_id);
163
164/**
165 * rdma_res_to_id() - return the rdma_cm_id pointer for this restrack.
166 * @res: rdma resource tracking entry pointer
167 */
168struct rdma_cm_id *rdma_res_to_id(struct rdma_restrack_entry *res)
169{
170 struct rdma_id_private *id_priv =
171 container_of(res, struct rdma_id_private, res);
172
173 return &id_priv->id;
174}
175EXPORT_SYMBOL(rdma_res_to_id);
176
177static void cma_add_one(struct ib_device *device);
178static void cma_remove_one(struct ib_device *device, void *client_data);
179
180static struct ib_client cma_client = {
181 .name = "cma",
182 .add = cma_add_one,
183 .remove = cma_remove_one
184};
185
186static struct ib_sa_client sa_client;
187static LIST_HEAD(dev_list);
188static LIST_HEAD(listen_any_list);
189static DEFINE_MUTEX(lock);
190static struct workqueue_struct *cma_wq;
191static unsigned int cma_pernet_id;
192
193struct cma_pernet {
194 struct xarray tcp_ps;
195 struct xarray udp_ps;
196 struct xarray ipoib_ps;
197 struct xarray ib_ps;
198};
199
200static struct cma_pernet *cma_pernet(struct net *net)
201{
202 return net_generic(net, cma_pernet_id);
203}
204
205static
206struct xarray *cma_pernet_xa(struct net *net, enum rdma_ucm_port_space ps)
207{
208 struct cma_pernet *pernet = cma_pernet(net);
209
210 switch (ps) {
211 case RDMA_PS_TCP:
212 return &pernet->tcp_ps;
213 case RDMA_PS_UDP:
214 return &pernet->udp_ps;
215 case RDMA_PS_IPOIB:
216 return &pernet->ipoib_ps;
217 case RDMA_PS_IB:
218 return &pernet->ib_ps;
219 default:
220 return NULL;
221 }
222}
223
224struct cma_device {
225 struct list_head list;
226 struct ib_device *device;
227 struct completion comp;
228 atomic_t refcount;
229 struct list_head id_list;
230 enum ib_gid_type *default_gid_type;
231 u8 *default_roce_tos;
232};
233
234struct rdma_bind_list {
235 enum rdma_ucm_port_space ps;
236 struct hlist_head owners;
237 unsigned short port;
238};
239
240struct class_port_info_context {
241 struct ib_class_port_info *class_port_info;
242 struct ib_device *device;
243 struct completion done;
244 struct ib_sa_query *sa_query;
245 u8 port_num;
246};
247
248static int cma_ps_alloc(struct net *net, enum rdma_ucm_port_space ps,
249 struct rdma_bind_list *bind_list, int snum)
250{
251 struct xarray *xa = cma_pernet_xa(net, ps);
252
253 return xa_insert(xa, snum, bind_list, GFP_KERNEL);
254}
255
256static struct rdma_bind_list *cma_ps_find(struct net *net,
257 enum rdma_ucm_port_space ps, int snum)
258{
259 struct xarray *xa = cma_pernet_xa(net, ps);
260
261 return xa_load(xa, snum);
262}
263
264static void cma_ps_remove(struct net *net, enum rdma_ucm_port_space ps,
265 int snum)
266{
267 struct xarray *xa = cma_pernet_xa(net, ps);
268
269 xa_erase(xa, snum);
270}
271
272enum {
273 CMA_OPTION_AFONLY,
274};
275
276void cma_ref_dev(struct cma_device *cma_dev)
277{
278 atomic_inc(&cma_dev->refcount);
279}
280
281struct cma_device *cma_enum_devices_by_ibdev(cma_device_filter filter,
282 void *cookie)
283{
284 struct cma_device *cma_dev;
285 struct cma_device *found_cma_dev = NULL;
286
287 mutex_lock(&lock);
288
289 list_for_each_entry(cma_dev, &dev_list, list)
290 if (filter(cma_dev->device, cookie)) {
291 found_cma_dev = cma_dev;
292 break;
293 }
294
295 if (found_cma_dev)
296 cma_ref_dev(found_cma_dev);
297 mutex_unlock(&lock);
298 return found_cma_dev;
299}
300
301int cma_get_default_gid_type(struct cma_device *cma_dev,
302 unsigned int port)
303{
304 if (!rdma_is_port_valid(cma_dev->device, port))
305 return -EINVAL;
306
307 return cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)];
308}
309
310int cma_set_default_gid_type(struct cma_device *cma_dev,
311 unsigned int port,
312 enum ib_gid_type default_gid_type)
313{
314 unsigned long supported_gids;
315
316 if (!rdma_is_port_valid(cma_dev->device, port))
317 return -EINVAL;
318
319 supported_gids = roce_gid_type_mask_support(cma_dev->device, port);
320
321 if (!(supported_gids & 1 << default_gid_type))
322 return -EINVAL;
323
324 cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)] =
325 default_gid_type;
326
327 return 0;
328}
329
330int cma_get_default_roce_tos(struct cma_device *cma_dev, unsigned int port)
331{
332 if (!rdma_is_port_valid(cma_dev->device, port))
333 return -EINVAL;
334
335 return cma_dev->default_roce_tos[port - rdma_start_port(cma_dev->device)];
336}
337
338int cma_set_default_roce_tos(struct cma_device *cma_dev, unsigned int port,
339 u8 default_roce_tos)
340{
341 if (!rdma_is_port_valid(cma_dev->device, port))
342 return -EINVAL;
343
344 cma_dev->default_roce_tos[port - rdma_start_port(cma_dev->device)] =
345 default_roce_tos;
346
347 return 0;
348}
349struct ib_device *cma_get_ib_dev(struct cma_device *cma_dev)
350{
351 return cma_dev->device;
352}
353
354/*
355 * Device removal can occur at anytime, so we need extra handling to
356 * serialize notifying the user of device removal with other callbacks.
357 * We do this by disabling removal notification while a callback is in process,
358 * and reporting it after the callback completes.
359 */
360
361struct cma_multicast {
362 struct rdma_id_private *id_priv;
363 union {
364 struct ib_sa_multicast *ib;
365 } multicast;
366 struct list_head list;
367 void *context;
368 struct sockaddr_storage addr;
369 struct kref mcref;
370 u8 join_state;
371};
372
373struct cma_work {
374 struct work_struct work;
375 struct rdma_id_private *id;
376 enum rdma_cm_state old_state;
377 enum rdma_cm_state new_state;
378 struct rdma_cm_event event;
379};
380
381struct cma_ndev_work {
382 struct work_struct work;
383 struct rdma_id_private *id;
384 struct rdma_cm_event event;
385};
386
387struct iboe_mcast_work {
388 struct work_struct work;
389 struct rdma_id_private *id;
390 struct cma_multicast *mc;
391};
392
393union cma_ip_addr {
394 struct in6_addr ip6;
395 struct {
396 __be32 pad[3];
397 __be32 addr;
398 } ip4;
399};
400
401struct cma_hdr {
402 u8 cma_version;
403 u8 ip_version; /* IP version: 7:4 */
404 __be16 port;
405 union cma_ip_addr src_addr;
406 union cma_ip_addr dst_addr;
407};
408
409#define CMA_VERSION 0x00
410
411struct cma_req_info {
412 struct sockaddr_storage listen_addr_storage;
413 struct sockaddr_storage src_addr_storage;
414 struct ib_device *device;
415 union ib_gid local_gid;
416 __be64 service_id;
417 int port;
418 bool has_gid;
419 u16 pkey;
420};
421
422static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp)
423{
424 unsigned long flags;
425 int ret;
426
427 spin_lock_irqsave(&id_priv->lock, flags);
428 ret = (id_priv->state == comp);
429 spin_unlock_irqrestore(&id_priv->lock, flags);
430 return ret;
431}
432
433static int cma_comp_exch(struct rdma_id_private *id_priv,
434 enum rdma_cm_state comp, enum rdma_cm_state exch)
435{
436 unsigned long flags;
437 int ret;
438
439 spin_lock_irqsave(&id_priv->lock, flags);
440 if ((ret = (id_priv->state == comp)))
441 id_priv->state = exch;
442 spin_unlock_irqrestore(&id_priv->lock, flags);
443 return ret;
444}
445
446static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv,
447 enum rdma_cm_state exch)
448{
449 unsigned long flags;
450 enum rdma_cm_state old;
451
452 spin_lock_irqsave(&id_priv->lock, flags);
453 old = id_priv->state;
454 id_priv->state = exch;
455 spin_unlock_irqrestore(&id_priv->lock, flags);
456 return old;
457}
458
459static inline u8 cma_get_ip_ver(const struct cma_hdr *hdr)
460{
461 return hdr->ip_version >> 4;
462}
463
464static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
465{
466 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
467}
468
469static int cma_igmp_send(struct net_device *ndev, union ib_gid *mgid, bool join)
470{
471 struct in_device *in_dev = NULL;
472
473 if (ndev) {
474 rtnl_lock();
475 in_dev = __in_dev_get_rtnl(ndev);
476 if (in_dev) {
477 if (join)
478 ip_mc_inc_group(in_dev,
479 *(__be32 *)(mgid->raw + 12));
480 else
481 ip_mc_dec_group(in_dev,
482 *(__be32 *)(mgid->raw + 12));
483 }
484 rtnl_unlock();
485 }
486 return (in_dev) ? 0 : -ENODEV;
487}
488
489static void _cma_attach_to_dev(struct rdma_id_private *id_priv,
490 struct cma_device *cma_dev)
491{
492 cma_ref_dev(cma_dev);
493 id_priv->cma_dev = cma_dev;
494 id_priv->id.device = cma_dev->device;
495 id_priv->id.route.addr.dev_addr.transport =
496 rdma_node_get_transport(cma_dev->device->node_type);
497 list_add_tail(&id_priv->list, &cma_dev->id_list);
498 if (id_priv->res.kern_name)
499 rdma_restrack_kadd(&id_priv->res);
500 else
501 rdma_restrack_uadd(&id_priv->res);
502}
503
504static void cma_attach_to_dev(struct rdma_id_private *id_priv,
505 struct cma_device *cma_dev)
506{
507 _cma_attach_to_dev(id_priv, cma_dev);
508 id_priv->gid_type =
509 cma_dev->default_gid_type[id_priv->id.port_num -
510 rdma_start_port(cma_dev->device)];
511}
512
513void cma_deref_dev(struct cma_device *cma_dev)
514{
515 if (atomic_dec_and_test(&cma_dev->refcount))
516 complete(&cma_dev->comp);
517}
518
519static inline void release_mc(struct kref *kref)
520{
521 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
522
523 kfree(mc->multicast.ib);
524 kfree(mc);
525}
526
527static void cma_release_dev(struct rdma_id_private *id_priv)
528{
529 mutex_lock(&lock);
530 list_del(&id_priv->list);
531 cma_deref_dev(id_priv->cma_dev);
532 id_priv->cma_dev = NULL;
533 mutex_unlock(&lock);
534}
535
536static inline struct sockaddr *cma_src_addr(struct rdma_id_private *id_priv)
537{
538 return (struct sockaddr *) &id_priv->id.route.addr.src_addr;
539}
540
541static inline struct sockaddr *cma_dst_addr(struct rdma_id_private *id_priv)
542{
543 return (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
544}
545
546static inline unsigned short cma_family(struct rdma_id_private *id_priv)
547{
548 return id_priv->id.route.addr.src_addr.ss_family;
549}
550
551static int cma_set_qkey(struct rdma_id_private *id_priv, u32 qkey)
552{
553 struct ib_sa_mcmember_rec rec;
554 int ret = 0;
555
556 if (id_priv->qkey) {
557 if (qkey && id_priv->qkey != qkey)
558 return -EINVAL;
559 return 0;
560 }
561
562 if (qkey) {
563 id_priv->qkey = qkey;
564 return 0;
565 }
566
567 switch (id_priv->id.ps) {
568 case RDMA_PS_UDP:
569 case RDMA_PS_IB:
570 id_priv->qkey = RDMA_UDP_QKEY;
571 break;
572 case RDMA_PS_IPOIB:
573 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
574 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
575 id_priv->id.port_num, &rec.mgid,
576 &rec);
577 if (!ret)
578 id_priv->qkey = be32_to_cpu(rec.qkey);
579 break;
580 default:
581 break;
582 }
583 return ret;
584}
585
586static void cma_translate_ib(struct sockaddr_ib *sib, struct rdma_dev_addr *dev_addr)
587{
588 dev_addr->dev_type = ARPHRD_INFINIBAND;
589 rdma_addr_set_sgid(dev_addr, (union ib_gid *) &sib->sib_addr);
590 ib_addr_set_pkey(dev_addr, ntohs(sib->sib_pkey));
591}
592
593static int cma_translate_addr(struct sockaddr *addr, struct rdma_dev_addr *dev_addr)
594{
595 int ret;
596
597 if (addr->sa_family != AF_IB) {
598 ret = rdma_translate_ip(addr, dev_addr);
599 } else {
600 cma_translate_ib((struct sockaddr_ib *) addr, dev_addr);
601 ret = 0;
602 }
603
604 return ret;
605}
606
607static const struct ib_gid_attr *
608cma_validate_port(struct ib_device *device, u8 port,
609 enum ib_gid_type gid_type,
610 union ib_gid *gid,
611 struct rdma_id_private *id_priv)
612{
613 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
614 int bound_if_index = dev_addr->bound_dev_if;
615 const struct ib_gid_attr *sgid_attr;
616 int dev_type = dev_addr->dev_type;
617 struct net_device *ndev = NULL;
618
619 if (!rdma_dev_access_netns(device, id_priv->id.route.addr.dev_addr.net))
620 return ERR_PTR(-ENODEV);
621
622 if ((dev_type == ARPHRD_INFINIBAND) && !rdma_protocol_ib(device, port))
623 return ERR_PTR(-ENODEV);
624
625 if ((dev_type != ARPHRD_INFINIBAND) && rdma_protocol_ib(device, port))
626 return ERR_PTR(-ENODEV);
627
628 if (dev_type == ARPHRD_ETHER && rdma_protocol_roce(device, port)) {
629 ndev = dev_get_by_index(dev_addr->net, bound_if_index);
630 if (!ndev)
631 return ERR_PTR(-ENODEV);
632 } else {
633 gid_type = IB_GID_TYPE_IB;
634 }
635
636 sgid_attr = rdma_find_gid_by_port(device, gid, gid_type, port, ndev);
637 if (ndev)
638 dev_put(ndev);
639 return sgid_attr;
640}
641
642static void cma_bind_sgid_attr(struct rdma_id_private *id_priv,
643 const struct ib_gid_attr *sgid_attr)
644{
645 WARN_ON(id_priv->id.route.addr.dev_addr.sgid_attr);
646 id_priv->id.route.addr.dev_addr.sgid_attr = sgid_attr;
647}
648
649/**
650 * cma_acquire_dev_by_src_ip - Acquire cma device, port, gid attribute
651 * based on source ip address.
652 * @id_priv: cm_id which should be bound to cma device
653 *
654 * cma_acquire_dev_by_src_ip() binds cm id to cma device, port and GID attribute
655 * based on source IP address. It returns 0 on success or error code otherwise.
656 * It is applicable to active and passive side cm_id.
657 */
658static int cma_acquire_dev_by_src_ip(struct rdma_id_private *id_priv)
659{
660 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
661 const struct ib_gid_attr *sgid_attr;
662 union ib_gid gid, iboe_gid, *gidp;
663 struct cma_device *cma_dev;
664 enum ib_gid_type gid_type;
665 int ret = -ENODEV;
666 unsigned int port;
667
668 if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
669 id_priv->id.ps == RDMA_PS_IPOIB)
670 return -EINVAL;
671
672 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
673 &iboe_gid);
674
675 memcpy(&gid, dev_addr->src_dev_addr +
676 rdma_addr_gid_offset(dev_addr), sizeof(gid));
677
678 mutex_lock(&lock);
679 list_for_each_entry(cma_dev, &dev_list, list) {
680 rdma_for_each_port (cma_dev->device, port) {
681 gidp = rdma_protocol_roce(cma_dev->device, port) ?
682 &iboe_gid : &gid;
683 gid_type = cma_dev->default_gid_type[port - 1];
684 sgid_attr = cma_validate_port(cma_dev->device, port,
685 gid_type, gidp, id_priv);
686 if (!IS_ERR(sgid_attr)) {
687 id_priv->id.port_num = port;
688 cma_bind_sgid_attr(id_priv, sgid_attr);
689 cma_attach_to_dev(id_priv, cma_dev);
690 ret = 0;
691 goto out;
692 }
693 }
694 }
695out:
696 mutex_unlock(&lock);
697 return ret;
698}
699
700/**
701 * cma_ib_acquire_dev - Acquire cma device, port and SGID attribute
702 * @id_priv: cm id to bind to cma device
703 * @listen_id_priv: listener cm id to match against
704 * @req: Pointer to req structure containaining incoming
705 * request information
706 * cma_ib_acquire_dev() acquires cma device, port and SGID attribute when
707 * rdma device matches for listen_id and incoming request. It also verifies
708 * that a GID table entry is present for the source address.
709 * Returns 0 on success, or returns error code otherwise.
710 */
711static int cma_ib_acquire_dev(struct rdma_id_private *id_priv,
712 const struct rdma_id_private *listen_id_priv,
713 struct cma_req_info *req)
714{
715 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
716 const struct ib_gid_attr *sgid_attr;
717 enum ib_gid_type gid_type;
718 union ib_gid gid;
719
720 if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
721 id_priv->id.ps == RDMA_PS_IPOIB)
722 return -EINVAL;
723
724 if (rdma_protocol_roce(req->device, req->port))
725 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
726 &gid);
727 else
728 memcpy(&gid, dev_addr->src_dev_addr +
729 rdma_addr_gid_offset(dev_addr), sizeof(gid));
730
731 gid_type = listen_id_priv->cma_dev->default_gid_type[req->port - 1];
732 sgid_attr = cma_validate_port(req->device, req->port,
733 gid_type, &gid, id_priv);
734 if (IS_ERR(sgid_attr))
735 return PTR_ERR(sgid_attr);
736
737 id_priv->id.port_num = req->port;
738 cma_bind_sgid_attr(id_priv, sgid_attr);
739 /* Need to acquire lock to protect against reader
740 * of cma_dev->id_list such as cma_netdev_callback() and
741 * cma_process_remove().
742 */
743 mutex_lock(&lock);
744 cma_attach_to_dev(id_priv, listen_id_priv->cma_dev);
745 mutex_unlock(&lock);
746 return 0;
747}
748
749static int cma_iw_acquire_dev(struct rdma_id_private *id_priv,
750 const struct rdma_id_private *listen_id_priv)
751{
752 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
753 const struct ib_gid_attr *sgid_attr;
754 struct cma_device *cma_dev;
755 enum ib_gid_type gid_type;
756 int ret = -ENODEV;
757 union ib_gid gid;
758 u8 port;
759
760 if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
761 id_priv->id.ps == RDMA_PS_IPOIB)
762 return -EINVAL;
763
764 memcpy(&gid, dev_addr->src_dev_addr +
765 rdma_addr_gid_offset(dev_addr), sizeof(gid));
766
767 mutex_lock(&lock);
768
769 cma_dev = listen_id_priv->cma_dev;
770 port = listen_id_priv->id.port_num;
771 gid_type = listen_id_priv->gid_type;
772 sgid_attr = cma_validate_port(cma_dev->device, port,
773 gid_type, &gid, id_priv);
774 if (!IS_ERR(sgid_attr)) {
775 id_priv->id.port_num = port;
776 cma_bind_sgid_attr(id_priv, sgid_attr);
777 ret = 0;
778 goto out;
779 }
780
781 list_for_each_entry(cma_dev, &dev_list, list) {
782 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
783 if (listen_id_priv->cma_dev == cma_dev &&
784 listen_id_priv->id.port_num == port)
785 continue;
786
787 gid_type = cma_dev->default_gid_type[port - 1];
788 sgid_attr = cma_validate_port(cma_dev->device, port,
789 gid_type, &gid, id_priv);
790 if (!IS_ERR(sgid_attr)) {
791 id_priv->id.port_num = port;
792 cma_bind_sgid_attr(id_priv, sgid_attr);
793 ret = 0;
794 goto out;
795 }
796 }
797 }
798
799out:
800 if (!ret)
801 cma_attach_to_dev(id_priv, cma_dev);
802
803 mutex_unlock(&lock);
804 return ret;
805}
806
807/*
808 * Select the source IB device and address to reach the destination IB address.
809 */
810static int cma_resolve_ib_dev(struct rdma_id_private *id_priv)
811{
812 struct cma_device *cma_dev, *cur_dev;
813 struct sockaddr_ib *addr;
814 union ib_gid gid, sgid, *dgid;
815 u16 pkey, index;
816 u8 p;
817 enum ib_port_state port_state;
818 int i;
819
820 cma_dev = NULL;
821 addr = (struct sockaddr_ib *) cma_dst_addr(id_priv);
822 dgid = (union ib_gid *) &addr->sib_addr;
823 pkey = ntohs(addr->sib_pkey);
824
825 mutex_lock(&lock);
826 list_for_each_entry(cur_dev, &dev_list, list) {
827 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
828 if (!rdma_cap_af_ib(cur_dev->device, p))
829 continue;
830
831 if (ib_find_cached_pkey(cur_dev->device, p, pkey, &index))
832 continue;
833
834 if (ib_get_cached_port_state(cur_dev->device, p, &port_state))
835 continue;
836 for (i = 0; !rdma_query_gid(cur_dev->device,
837 p, i, &gid);
838 i++) {
839 if (!memcmp(&gid, dgid, sizeof(gid))) {
840 cma_dev = cur_dev;
841 sgid = gid;
842 id_priv->id.port_num = p;
843 goto found;
844 }
845
846 if (!cma_dev && (gid.global.subnet_prefix ==
847 dgid->global.subnet_prefix) &&
848 port_state == IB_PORT_ACTIVE) {
849 cma_dev = cur_dev;
850 sgid = gid;
851 id_priv->id.port_num = p;
852 goto found;
853 }
854 }
855 }
856 }
857 mutex_unlock(&lock);
858 return -ENODEV;
859
860found:
861 cma_attach_to_dev(id_priv, cma_dev);
862 mutex_unlock(&lock);
863 addr = (struct sockaddr_ib *)cma_src_addr(id_priv);
864 memcpy(&addr->sib_addr, &sgid, sizeof(sgid));
865 cma_translate_ib(addr, &id_priv->id.route.addr.dev_addr);
866 return 0;
867}
868
869static void cma_deref_id(struct rdma_id_private *id_priv)
870{
871 if (atomic_dec_and_test(&id_priv->refcount))
872 complete(&id_priv->comp);
873}
874
875struct rdma_cm_id *__rdma_create_id(struct net *net,
876 rdma_cm_event_handler event_handler,
877 void *context, enum rdma_ucm_port_space ps,
878 enum ib_qp_type qp_type, const char *caller)
879{
880 struct rdma_id_private *id_priv;
881
882 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
883 if (!id_priv)
884 return ERR_PTR(-ENOMEM);
885
886 rdma_restrack_set_task(&id_priv->res, caller);
887 id_priv->res.type = RDMA_RESTRACK_CM_ID;
888 id_priv->state = RDMA_CM_IDLE;
889 id_priv->id.context = context;
890 id_priv->id.event_handler = event_handler;
891 id_priv->id.ps = ps;
892 id_priv->id.qp_type = qp_type;
893 id_priv->tos_set = false;
894 id_priv->timeout_set = false;
895 id_priv->gid_type = IB_GID_TYPE_IB;
896 spin_lock_init(&id_priv->lock);
897 mutex_init(&id_priv->qp_mutex);
898 init_completion(&id_priv->comp);
899 atomic_set(&id_priv->refcount, 1);
900 mutex_init(&id_priv->handler_mutex);
901 INIT_LIST_HEAD(&id_priv->listen_list);
902 INIT_LIST_HEAD(&id_priv->mc_list);
903 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
904 id_priv->id.route.addr.dev_addr.net = get_net(net);
905 id_priv->seq_num &= 0x00ffffff;
906
907 return &id_priv->id;
908}
909EXPORT_SYMBOL(__rdma_create_id);
910
911static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
912{
913 struct ib_qp_attr qp_attr;
914 int qp_attr_mask, ret;
915
916 qp_attr.qp_state = IB_QPS_INIT;
917 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
918 if (ret)
919 return ret;
920
921 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
922 if (ret)
923 return ret;
924
925 qp_attr.qp_state = IB_QPS_RTR;
926 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
927 if (ret)
928 return ret;
929
930 qp_attr.qp_state = IB_QPS_RTS;
931 qp_attr.sq_psn = 0;
932 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
933
934 return ret;
935}
936
937static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
938{
939 struct ib_qp_attr qp_attr;
940 int qp_attr_mask, ret;
941
942 qp_attr.qp_state = IB_QPS_INIT;
943 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
944 if (ret)
945 return ret;
946
947 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
948}
949
950int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
951 struct ib_qp_init_attr *qp_init_attr)
952{
953 struct rdma_id_private *id_priv;
954 struct ib_qp *qp;
955 int ret;
956
957 id_priv = container_of(id, struct rdma_id_private, id);
958 if (id->device != pd->device)
959 return -EINVAL;
960
961 qp_init_attr->port_num = id->port_num;
962 qp = ib_create_qp(pd, qp_init_attr);
963 if (IS_ERR(qp))
964 return PTR_ERR(qp);
965
966 if (id->qp_type == IB_QPT_UD)
967 ret = cma_init_ud_qp(id_priv, qp);
968 else
969 ret = cma_init_conn_qp(id_priv, qp);
970 if (ret)
971 goto err;
972
973 id->qp = qp;
974 id_priv->qp_num = qp->qp_num;
975 id_priv->srq = (qp->srq != NULL);
976 return 0;
977err:
978 ib_destroy_qp(qp);
979 return ret;
980}
981EXPORT_SYMBOL(rdma_create_qp);
982
983void rdma_destroy_qp(struct rdma_cm_id *id)
984{
985 struct rdma_id_private *id_priv;
986
987 id_priv = container_of(id, struct rdma_id_private, id);
988 mutex_lock(&id_priv->qp_mutex);
989 ib_destroy_qp(id_priv->id.qp);
990 id_priv->id.qp = NULL;
991 mutex_unlock(&id_priv->qp_mutex);
992}
993EXPORT_SYMBOL(rdma_destroy_qp);
994
995static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
996 struct rdma_conn_param *conn_param)
997{
998 struct ib_qp_attr qp_attr;
999 int qp_attr_mask, ret;
1000
1001 mutex_lock(&id_priv->qp_mutex);
1002 if (!id_priv->id.qp) {
1003 ret = 0;
1004 goto out;
1005 }
1006
1007 /* Need to update QP attributes from default values. */
1008 qp_attr.qp_state = IB_QPS_INIT;
1009 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
1010 if (ret)
1011 goto out;
1012
1013 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
1014 if (ret)
1015 goto out;
1016
1017 qp_attr.qp_state = IB_QPS_RTR;
1018 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
1019 if (ret)
1020 goto out;
1021
1022 BUG_ON(id_priv->cma_dev->device != id_priv->id.device);
1023
1024 if (conn_param)
1025 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
1026 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
1027out:
1028 mutex_unlock(&id_priv->qp_mutex);
1029 return ret;
1030}
1031
1032static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
1033 struct rdma_conn_param *conn_param)
1034{
1035 struct ib_qp_attr qp_attr;
1036 int qp_attr_mask, ret;
1037
1038 mutex_lock(&id_priv->qp_mutex);
1039 if (!id_priv->id.qp) {
1040 ret = 0;
1041 goto out;
1042 }
1043
1044 qp_attr.qp_state = IB_QPS_RTS;
1045 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
1046 if (ret)
1047 goto out;
1048
1049 if (conn_param)
1050 qp_attr.max_rd_atomic = conn_param->initiator_depth;
1051 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
1052out:
1053 mutex_unlock(&id_priv->qp_mutex);
1054 return ret;
1055}
1056
1057static int cma_modify_qp_err(struct rdma_id_private *id_priv)
1058{
1059 struct ib_qp_attr qp_attr;
1060 int ret;
1061
1062 mutex_lock(&id_priv->qp_mutex);
1063 if (!id_priv->id.qp) {
1064 ret = 0;
1065 goto out;
1066 }
1067
1068 qp_attr.qp_state = IB_QPS_ERR;
1069 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
1070out:
1071 mutex_unlock(&id_priv->qp_mutex);
1072 return ret;
1073}
1074
1075static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
1076 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
1077{
1078 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
1079 int ret;
1080 u16 pkey;
1081
1082 if (rdma_cap_eth_ah(id_priv->id.device, id_priv->id.port_num))
1083 pkey = 0xffff;
1084 else
1085 pkey = ib_addr_get_pkey(dev_addr);
1086
1087 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
1088 pkey, &qp_attr->pkey_index);
1089 if (ret)
1090 return ret;
1091
1092 qp_attr->port_num = id_priv->id.port_num;
1093 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
1094
1095 if (id_priv->id.qp_type == IB_QPT_UD) {
1096 ret = cma_set_qkey(id_priv, 0);
1097 if (ret)
1098 return ret;
1099
1100 qp_attr->qkey = id_priv->qkey;
1101 *qp_attr_mask |= IB_QP_QKEY;
1102 } else {
1103 qp_attr->qp_access_flags = 0;
1104 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
1105 }
1106 return 0;
1107}
1108
1109int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
1110 int *qp_attr_mask)
1111{
1112 struct rdma_id_private *id_priv;
1113 int ret = 0;
1114
1115 id_priv = container_of(id, struct rdma_id_private, id);
1116 if (rdma_cap_ib_cm(id->device, id->port_num)) {
1117 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
1118 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
1119 else
1120 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
1121 qp_attr_mask);
1122
1123 if (qp_attr->qp_state == IB_QPS_RTR)
1124 qp_attr->rq_psn = id_priv->seq_num;
1125 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
1126 if (!id_priv->cm_id.iw) {
1127 qp_attr->qp_access_flags = 0;
1128 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
1129 } else
1130 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
1131 qp_attr_mask);
1132 qp_attr->port_num = id_priv->id.port_num;
1133 *qp_attr_mask |= IB_QP_PORT;
1134 } else
1135 ret = -ENOSYS;
1136
1137 if ((*qp_attr_mask & IB_QP_TIMEOUT) && id_priv->timeout_set)
1138 qp_attr->timeout = id_priv->timeout;
1139
1140 return ret;
1141}
1142EXPORT_SYMBOL(rdma_init_qp_attr);
1143
1144static inline bool cma_zero_addr(const struct sockaddr *addr)
1145{
1146 switch (addr->sa_family) {
1147 case AF_INET:
1148 return ipv4_is_zeronet(((struct sockaddr_in *)addr)->sin_addr.s_addr);
1149 case AF_INET6:
1150 return ipv6_addr_any(&((struct sockaddr_in6 *)addr)->sin6_addr);
1151 case AF_IB:
1152 return ib_addr_any(&((struct sockaddr_ib *)addr)->sib_addr);
1153 default:
1154 return false;
1155 }
1156}
1157
1158static inline bool cma_loopback_addr(const struct sockaddr *addr)
1159{
1160 switch (addr->sa_family) {
1161 case AF_INET:
1162 return ipv4_is_loopback(
1163 ((struct sockaddr_in *)addr)->sin_addr.s_addr);
1164 case AF_INET6:
1165 return ipv6_addr_loopback(
1166 &((struct sockaddr_in6 *)addr)->sin6_addr);
1167 case AF_IB:
1168 return ib_addr_loopback(
1169 &((struct sockaddr_ib *)addr)->sib_addr);
1170 default:
1171 return false;
1172 }
1173}
1174
1175static inline bool cma_any_addr(const struct sockaddr *addr)
1176{
1177 return cma_zero_addr(addr) || cma_loopback_addr(addr);
1178}
1179
1180static int cma_addr_cmp(const struct sockaddr *src, const struct sockaddr *dst)
1181{
1182 if (src->sa_family != dst->sa_family)
1183 return -1;
1184
1185 switch (src->sa_family) {
1186 case AF_INET:
1187 return ((struct sockaddr_in *)src)->sin_addr.s_addr !=
1188 ((struct sockaddr_in *)dst)->sin_addr.s_addr;
1189 case AF_INET6: {
1190 struct sockaddr_in6 *src_addr6 = (struct sockaddr_in6 *)src;
1191 struct sockaddr_in6 *dst_addr6 = (struct sockaddr_in6 *)dst;
1192 bool link_local;
1193
1194 if (ipv6_addr_cmp(&src_addr6->sin6_addr,
1195 &dst_addr6->sin6_addr))
1196 return 1;
1197 link_local = ipv6_addr_type(&dst_addr6->sin6_addr) &
1198 IPV6_ADDR_LINKLOCAL;
1199 /* Link local must match their scope_ids */
1200 return link_local ? (src_addr6->sin6_scope_id !=
1201 dst_addr6->sin6_scope_id) :
1202 0;
1203 }
1204
1205 default:
1206 return ib_addr_cmp(&((struct sockaddr_ib *) src)->sib_addr,
1207 &((struct sockaddr_ib *) dst)->sib_addr);
1208 }
1209}
1210
1211static __be16 cma_port(const struct sockaddr *addr)
1212{
1213 struct sockaddr_ib *sib;
1214
1215 switch (addr->sa_family) {
1216 case AF_INET:
1217 return ((struct sockaddr_in *) addr)->sin_port;
1218 case AF_INET6:
1219 return ((struct sockaddr_in6 *) addr)->sin6_port;
1220 case AF_IB:
1221 sib = (struct sockaddr_ib *) addr;
1222 return htons((u16) (be64_to_cpu(sib->sib_sid) &
1223 be64_to_cpu(sib->sib_sid_mask)));
1224 default:
1225 return 0;
1226 }
1227}
1228
1229static inline int cma_any_port(const struct sockaddr *addr)
1230{
1231 return !cma_port(addr);
1232}
1233
1234static void cma_save_ib_info(struct sockaddr *src_addr,
1235 struct sockaddr *dst_addr,
1236 const struct rdma_cm_id *listen_id,
1237 const struct sa_path_rec *path)
1238{
1239 struct sockaddr_ib *listen_ib, *ib;
1240
1241 listen_ib = (struct sockaddr_ib *) &listen_id->route.addr.src_addr;
1242 if (src_addr) {
1243 ib = (struct sockaddr_ib *)src_addr;
1244 ib->sib_family = AF_IB;
1245 if (path) {
1246 ib->sib_pkey = path->pkey;
1247 ib->sib_flowinfo = path->flow_label;
1248 memcpy(&ib->sib_addr, &path->sgid, 16);
1249 ib->sib_sid = path->service_id;
1250 ib->sib_scope_id = 0;
1251 } else {
1252 ib->sib_pkey = listen_ib->sib_pkey;
1253 ib->sib_flowinfo = listen_ib->sib_flowinfo;
1254 ib->sib_addr = listen_ib->sib_addr;
1255 ib->sib_sid = listen_ib->sib_sid;
1256 ib->sib_scope_id = listen_ib->sib_scope_id;
1257 }
1258 ib->sib_sid_mask = cpu_to_be64(0xffffffffffffffffULL);
1259 }
1260 if (dst_addr) {
1261 ib = (struct sockaddr_ib *)dst_addr;
1262 ib->sib_family = AF_IB;
1263 if (path) {
1264 ib->sib_pkey = path->pkey;
1265 ib->sib_flowinfo = path->flow_label;
1266 memcpy(&ib->sib_addr, &path->dgid, 16);
1267 }
1268 }
1269}
1270
1271static void cma_save_ip4_info(struct sockaddr_in *src_addr,
1272 struct sockaddr_in *dst_addr,
1273 struct cma_hdr *hdr,
1274 __be16 local_port)
1275{
1276 if (src_addr) {
1277 *src_addr = (struct sockaddr_in) {
1278 .sin_family = AF_INET,
1279 .sin_addr.s_addr = hdr->dst_addr.ip4.addr,
1280 .sin_port = local_port,
1281 };
1282 }
1283
1284 if (dst_addr) {
1285 *dst_addr = (struct sockaddr_in) {
1286 .sin_family = AF_INET,
1287 .sin_addr.s_addr = hdr->src_addr.ip4.addr,
1288 .sin_port = hdr->port,
1289 };
1290 }
1291}
1292
1293static void cma_save_ip6_info(struct sockaddr_in6 *src_addr,
1294 struct sockaddr_in6 *dst_addr,
1295 struct cma_hdr *hdr,
1296 __be16 local_port)
1297{
1298 if (src_addr) {
1299 *src_addr = (struct sockaddr_in6) {
1300 .sin6_family = AF_INET6,
1301 .sin6_addr = hdr->dst_addr.ip6,
1302 .sin6_port = local_port,
1303 };
1304 }
1305
1306 if (dst_addr) {
1307 *dst_addr = (struct sockaddr_in6) {
1308 .sin6_family = AF_INET6,
1309 .sin6_addr = hdr->src_addr.ip6,
1310 .sin6_port = hdr->port,
1311 };
1312 }
1313}
1314
1315static u16 cma_port_from_service_id(__be64 service_id)
1316{
1317 return (u16)be64_to_cpu(service_id);
1318}
1319
1320static int cma_save_ip_info(struct sockaddr *src_addr,
1321 struct sockaddr *dst_addr,
1322 const struct ib_cm_event *ib_event,
1323 __be64 service_id)
1324{
1325 struct cma_hdr *hdr;
1326 __be16 port;
1327
1328 hdr = ib_event->private_data;
1329 if (hdr->cma_version != CMA_VERSION)
1330 return -EINVAL;
1331
1332 port = htons(cma_port_from_service_id(service_id));
1333
1334 switch (cma_get_ip_ver(hdr)) {
1335 case 4:
1336 cma_save_ip4_info((struct sockaddr_in *)src_addr,
1337 (struct sockaddr_in *)dst_addr, hdr, port);
1338 break;
1339 case 6:
1340 cma_save_ip6_info((struct sockaddr_in6 *)src_addr,
1341 (struct sockaddr_in6 *)dst_addr, hdr, port);
1342 break;
1343 default:
1344 return -EAFNOSUPPORT;
1345 }
1346
1347 return 0;
1348}
1349
1350static int cma_save_net_info(struct sockaddr *src_addr,
1351 struct sockaddr *dst_addr,
1352 const struct rdma_cm_id *listen_id,
1353 const struct ib_cm_event *ib_event,
1354 sa_family_t sa_family, __be64 service_id)
1355{
1356 if (sa_family == AF_IB) {
1357 if (ib_event->event == IB_CM_REQ_RECEIVED)
1358 cma_save_ib_info(src_addr, dst_addr, listen_id,
1359 ib_event->param.req_rcvd.primary_path);
1360 else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED)
1361 cma_save_ib_info(src_addr, dst_addr, listen_id, NULL);
1362 return 0;
1363 }
1364
1365 return cma_save_ip_info(src_addr, dst_addr, ib_event, service_id);
1366}
1367
1368static int cma_save_req_info(const struct ib_cm_event *ib_event,
1369 struct cma_req_info *req)
1370{
1371 const struct ib_cm_req_event_param *req_param =
1372 &ib_event->param.req_rcvd;
1373 const struct ib_cm_sidr_req_event_param *sidr_param =
1374 &ib_event->param.sidr_req_rcvd;
1375
1376 switch (ib_event->event) {
1377 case IB_CM_REQ_RECEIVED:
1378 req->device = req_param->listen_id->device;
1379 req->port = req_param->port;
1380 memcpy(&req->local_gid, &req_param->primary_path->sgid,
1381 sizeof(req->local_gid));
1382 req->has_gid = true;
1383 req->service_id = req_param->primary_path->service_id;
1384 req->pkey = be16_to_cpu(req_param->primary_path->pkey);
1385 if (req->pkey != req_param->bth_pkey)
1386 pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and primary path P_Key (0x%x)\n"
1387 "RDMA CMA: in the future this may cause the request to be dropped\n",
1388 req_param->bth_pkey, req->pkey);
1389 break;
1390 case IB_CM_SIDR_REQ_RECEIVED:
1391 req->device = sidr_param->listen_id->device;
1392 req->port = sidr_param->port;
1393 req->has_gid = false;
1394 req->service_id = sidr_param->service_id;
1395 req->pkey = sidr_param->pkey;
1396 if (req->pkey != sidr_param->bth_pkey)
1397 pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and SIDR request payload P_Key (0x%x)\n"
1398 "RDMA CMA: in the future this may cause the request to be dropped\n",
1399 sidr_param->bth_pkey, req->pkey);
1400 break;
1401 default:
1402 return -EINVAL;
1403 }
1404
1405 return 0;
1406}
1407
1408static bool validate_ipv4_net_dev(struct net_device *net_dev,
1409 const struct sockaddr_in *dst_addr,
1410 const struct sockaddr_in *src_addr)
1411{
1412 __be32 daddr = dst_addr->sin_addr.s_addr,
1413 saddr = src_addr->sin_addr.s_addr;
1414 struct fib_result res;
1415 struct flowi4 fl4;
1416 int err;
1417 bool ret;
1418
1419 if (ipv4_is_multicast(saddr) || ipv4_is_lbcast(saddr) ||
1420 ipv4_is_lbcast(daddr) || ipv4_is_zeronet(saddr) ||
1421 ipv4_is_zeronet(daddr) || ipv4_is_loopback(daddr) ||
1422 ipv4_is_loopback(saddr))
1423 return false;
1424
1425 memset(&fl4, 0, sizeof(fl4));
1426 fl4.flowi4_iif = net_dev->ifindex;
1427 fl4.daddr = daddr;
1428 fl4.saddr = saddr;
1429
1430 rcu_read_lock();
1431 err = fib_lookup(dev_net(net_dev), &fl4, &res, 0);
1432 ret = err == 0 && FIB_RES_DEV(res) == net_dev;
1433 rcu_read_unlock();
1434
1435 return ret;
1436}
1437
1438static bool validate_ipv6_net_dev(struct net_device *net_dev,
1439 const struct sockaddr_in6 *dst_addr,
1440 const struct sockaddr_in6 *src_addr)
1441{
1442#if IS_ENABLED(CONFIG_IPV6)
1443 const int strict = ipv6_addr_type(&dst_addr->sin6_addr) &
1444 IPV6_ADDR_LINKLOCAL;
1445 struct rt6_info *rt = rt6_lookup(dev_net(net_dev), &dst_addr->sin6_addr,
1446 &src_addr->sin6_addr, net_dev->ifindex,
1447 NULL, strict);
1448 bool ret;
1449
1450 if (!rt)
1451 return false;
1452
1453 ret = rt->rt6i_idev->dev == net_dev;
1454 ip6_rt_put(rt);
1455
1456 return ret;
1457#else
1458 return false;
1459#endif
1460}
1461
1462static bool validate_net_dev(struct net_device *net_dev,
1463 const struct sockaddr *daddr,
1464 const struct sockaddr *saddr)
1465{
1466 const struct sockaddr_in *daddr4 = (const struct sockaddr_in *)daddr;
1467 const struct sockaddr_in *saddr4 = (const struct sockaddr_in *)saddr;
1468 const struct sockaddr_in6 *daddr6 = (const struct sockaddr_in6 *)daddr;
1469 const struct sockaddr_in6 *saddr6 = (const struct sockaddr_in6 *)saddr;
1470
1471 switch (daddr->sa_family) {
1472 case AF_INET:
1473 return saddr->sa_family == AF_INET &&
1474 validate_ipv4_net_dev(net_dev, daddr4, saddr4);
1475
1476 case AF_INET6:
1477 return saddr->sa_family == AF_INET6 &&
1478 validate_ipv6_net_dev(net_dev, daddr6, saddr6);
1479
1480 default:
1481 return false;
1482 }
1483}
1484
1485static struct net_device *
1486roce_get_net_dev_by_cm_event(const struct ib_cm_event *ib_event)
1487{
1488 const struct ib_gid_attr *sgid_attr = NULL;
1489 struct net_device *ndev;
1490
1491 if (ib_event->event == IB_CM_REQ_RECEIVED)
1492 sgid_attr = ib_event->param.req_rcvd.ppath_sgid_attr;
1493 else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED)
1494 sgid_attr = ib_event->param.sidr_req_rcvd.sgid_attr;
1495
1496 if (!sgid_attr)
1497 return NULL;
1498
1499 rcu_read_lock();
1500 ndev = rdma_read_gid_attr_ndev_rcu(sgid_attr);
1501 if (IS_ERR(ndev))
1502 ndev = NULL;
1503 else
1504 dev_hold(ndev);
1505 rcu_read_unlock();
1506 return ndev;
1507}
1508
1509static struct net_device *cma_get_net_dev(const struct ib_cm_event *ib_event,
1510 struct cma_req_info *req)
1511{
1512 struct sockaddr *listen_addr =
1513 (struct sockaddr *)&req->listen_addr_storage;
1514 struct sockaddr *src_addr = (struct sockaddr *)&req->src_addr_storage;
1515 struct net_device *net_dev;
1516 const union ib_gid *gid = req->has_gid ? &req->local_gid : NULL;
1517 int err;
1518
1519 err = cma_save_ip_info(listen_addr, src_addr, ib_event,
1520 req->service_id);
1521 if (err)
1522 return ERR_PTR(err);
1523
1524 if (rdma_protocol_roce(req->device, req->port))
1525 net_dev = roce_get_net_dev_by_cm_event(ib_event);
1526 else
1527 net_dev = ib_get_net_dev_by_params(req->device, req->port,
1528 req->pkey,
1529 gid, listen_addr);
1530 if (!net_dev)
1531 return ERR_PTR(-ENODEV);
1532
1533 return net_dev;
1534}
1535
1536static enum rdma_ucm_port_space rdma_ps_from_service_id(__be64 service_id)
1537{
1538 return (be64_to_cpu(service_id) >> 16) & 0xffff;
1539}
1540
1541static bool cma_match_private_data(struct rdma_id_private *id_priv,
1542 const struct cma_hdr *hdr)
1543{
1544 struct sockaddr *addr = cma_src_addr(id_priv);
1545 __be32 ip4_addr;
1546 struct in6_addr ip6_addr;
1547
1548 if (cma_any_addr(addr) && !id_priv->afonly)
1549 return true;
1550
1551 switch (addr->sa_family) {
1552 case AF_INET:
1553 ip4_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
1554 if (cma_get_ip_ver(hdr) != 4)
1555 return false;
1556 if (!cma_any_addr(addr) &&
1557 hdr->dst_addr.ip4.addr != ip4_addr)
1558 return false;
1559 break;
1560 case AF_INET6:
1561 ip6_addr = ((struct sockaddr_in6 *)addr)->sin6_addr;
1562 if (cma_get_ip_ver(hdr) != 6)
1563 return false;
1564 if (!cma_any_addr(addr) &&
1565 memcmp(&hdr->dst_addr.ip6, &ip6_addr, sizeof(ip6_addr)))
1566 return false;
1567 break;
1568 case AF_IB:
1569 return true;
1570 default:
1571 return false;
1572 }
1573
1574 return true;
1575}
1576
1577static bool cma_protocol_roce(const struct rdma_cm_id *id)
1578{
1579 struct ib_device *device = id->device;
1580 const int port_num = id->port_num ?: rdma_start_port(device);
1581
1582 return rdma_protocol_roce(device, port_num);
1583}
1584
1585static bool cma_is_req_ipv6_ll(const struct cma_req_info *req)
1586{
1587 const struct sockaddr *daddr =
1588 (const struct sockaddr *)&req->listen_addr_storage;
1589 const struct sockaddr_in6 *daddr6 = (const struct sockaddr_in6 *)daddr;
1590
1591 /* Returns true if the req is for IPv6 link local */
1592 return (daddr->sa_family == AF_INET6 &&
1593 (ipv6_addr_type(&daddr6->sin6_addr) & IPV6_ADDR_LINKLOCAL));
1594}
1595
1596static bool cma_match_net_dev(const struct rdma_cm_id *id,
1597 const struct net_device *net_dev,
1598 const struct cma_req_info *req)
1599{
1600 const struct rdma_addr *addr = &id->route.addr;
1601
1602 if (!net_dev)
1603 /* This request is an AF_IB request */
1604 return (!id->port_num || id->port_num == req->port) &&
1605 (addr->src_addr.ss_family == AF_IB);
1606
1607 /*
1608 * If the request is not for IPv6 link local, allow matching
1609 * request to any netdevice of the one or multiport rdma device.
1610 */
1611 if (!cma_is_req_ipv6_ll(req))
1612 return true;
1613 /*
1614 * Net namespaces must match, and if the listner is listening
1615 * on a specific netdevice than netdevice must match as well.
1616 */
1617 if (net_eq(dev_net(net_dev), addr->dev_addr.net) &&
1618 (!!addr->dev_addr.bound_dev_if ==
1619 (addr->dev_addr.bound_dev_if == net_dev->ifindex)))
1620 return true;
1621 else
1622 return false;
1623}
1624
1625static struct rdma_id_private *cma_find_listener(
1626 const struct rdma_bind_list *bind_list,
1627 const struct ib_cm_id *cm_id,
1628 const struct ib_cm_event *ib_event,
1629 const struct cma_req_info *req,
1630 const struct net_device *net_dev)
1631{
1632 struct rdma_id_private *id_priv, *id_priv_dev;
1633
1634 if (!bind_list)
1635 return ERR_PTR(-EINVAL);
1636
1637 hlist_for_each_entry(id_priv, &bind_list->owners, node) {
1638 if (cma_match_private_data(id_priv, ib_event->private_data)) {
1639 if (id_priv->id.device == cm_id->device &&
1640 cma_match_net_dev(&id_priv->id, net_dev, req))
1641 return id_priv;
1642 list_for_each_entry(id_priv_dev,
1643 &id_priv->listen_list,
1644 listen_list) {
1645 if (id_priv_dev->id.device == cm_id->device &&
1646 cma_match_net_dev(&id_priv_dev->id,
1647 net_dev, req))
1648 return id_priv_dev;
1649 }
1650 }
1651 }
1652
1653 return ERR_PTR(-EINVAL);
1654}
1655
1656static struct rdma_id_private *
1657cma_ib_id_from_event(struct ib_cm_id *cm_id,
1658 const struct ib_cm_event *ib_event,
1659 struct cma_req_info *req,
1660 struct net_device **net_dev)
1661{
1662 struct rdma_bind_list *bind_list;
1663 struct rdma_id_private *id_priv;
1664 int err;
1665
1666 err = cma_save_req_info(ib_event, req);
1667 if (err)
1668 return ERR_PTR(err);
1669
1670 *net_dev = cma_get_net_dev(ib_event, req);
1671 if (IS_ERR(*net_dev)) {
1672 if (PTR_ERR(*net_dev) == -EAFNOSUPPORT) {
1673 /* Assuming the protocol is AF_IB */
1674 *net_dev = NULL;
1675 } else {
1676 return ERR_CAST(*net_dev);
1677 }
1678 }
1679
1680 /*
1681 * Net namespace might be getting deleted while route lookup,
1682 * cm_id lookup is in progress. Therefore, perform netdevice
1683 * validation, cm_id lookup under rcu lock.
1684 * RCU lock along with netdevice state check, synchronizes with
1685 * netdevice migrating to different net namespace and also avoids
1686 * case where net namespace doesn't get deleted while lookup is in
1687 * progress.
1688 * If the device state is not IFF_UP, its properties such as ifindex
1689 * and nd_net cannot be trusted to remain valid without rcu lock.
1690 * net/core/dev.c change_net_namespace() ensures to synchronize with
1691 * ongoing operations on net device after device is closed using
1692 * synchronize_net().
1693 */
1694 rcu_read_lock();
1695 if (*net_dev) {
1696 /*
1697 * If netdevice is down, it is likely that it is administratively
1698 * down or it might be migrating to different namespace.
1699 * In that case avoid further processing, as the net namespace
1700 * or ifindex may change.
1701 */
1702 if (((*net_dev)->flags & IFF_UP) == 0) {
1703 id_priv = ERR_PTR(-EHOSTUNREACH);
1704 goto err;
1705 }
1706
1707 if (!validate_net_dev(*net_dev,
1708 (struct sockaddr *)&req->listen_addr_storage,
1709 (struct sockaddr *)&req->src_addr_storage)) {
1710 id_priv = ERR_PTR(-EHOSTUNREACH);
1711 goto err;
1712 }
1713 }
1714
1715 bind_list = cma_ps_find(*net_dev ? dev_net(*net_dev) : &init_net,
1716 rdma_ps_from_service_id(req->service_id),
1717 cma_port_from_service_id(req->service_id));
1718 id_priv = cma_find_listener(bind_list, cm_id, ib_event, req, *net_dev);
1719err:
1720 rcu_read_unlock();
1721 if (IS_ERR(id_priv) && *net_dev) {
1722 dev_put(*net_dev);
1723 *net_dev = NULL;
1724 }
1725 return id_priv;
1726}
1727
1728static inline u8 cma_user_data_offset(struct rdma_id_private *id_priv)
1729{
1730 return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr);
1731}
1732
1733static void cma_cancel_route(struct rdma_id_private *id_priv)
1734{
1735 if (rdma_cap_ib_sa(id_priv->id.device, id_priv->id.port_num)) {
1736 if (id_priv->query)
1737 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
1738 }
1739}
1740
1741static void cma_cancel_listens(struct rdma_id_private *id_priv)
1742{
1743 struct rdma_id_private *dev_id_priv;
1744
1745 /*
1746 * Remove from listen_any_list to prevent added devices from spawning
1747 * additional listen requests.
1748 */
1749 mutex_lock(&lock);
1750 list_del(&id_priv->list);
1751
1752 while (!list_empty(&id_priv->listen_list)) {
1753 dev_id_priv = list_entry(id_priv->listen_list.next,
1754 struct rdma_id_private, listen_list);
1755 /* sync with device removal to avoid duplicate destruction */
1756 list_del_init(&dev_id_priv->list);
1757 list_del(&dev_id_priv->listen_list);
1758 mutex_unlock(&lock);
1759
1760 rdma_destroy_id(&dev_id_priv->id);
1761 mutex_lock(&lock);
1762 }
1763 mutex_unlock(&lock);
1764}
1765
1766static void cma_cancel_operation(struct rdma_id_private *id_priv,
1767 enum rdma_cm_state state)
1768{
1769 switch (state) {
1770 case RDMA_CM_ADDR_QUERY:
1771 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
1772 break;
1773 case RDMA_CM_ROUTE_QUERY:
1774 cma_cancel_route(id_priv);
1775 break;
1776 case RDMA_CM_LISTEN:
1777 if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev)
1778 cma_cancel_listens(id_priv);
1779 break;
1780 default:
1781 break;
1782 }
1783}
1784
1785static void cma_release_port(struct rdma_id_private *id_priv)
1786{
1787 struct rdma_bind_list *bind_list = id_priv->bind_list;
1788 struct net *net = id_priv->id.route.addr.dev_addr.net;
1789
1790 if (!bind_list)
1791 return;
1792
1793 mutex_lock(&lock);
1794 hlist_del(&id_priv->node);
1795 if (hlist_empty(&bind_list->owners)) {
1796 cma_ps_remove(net, bind_list->ps, bind_list->port);
1797 kfree(bind_list);
1798 }
1799 mutex_unlock(&lock);
1800}
1801
1802static void cma_leave_roce_mc_group(struct rdma_id_private *id_priv,
1803 struct cma_multicast *mc)
1804{
1805 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
1806 struct net_device *ndev = NULL;
1807
1808 if (dev_addr->bound_dev_if)
1809 ndev = dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
1810 if (ndev) {
1811 cma_igmp_send(ndev, &mc->multicast.ib->rec.mgid, false);
1812 dev_put(ndev);
1813 }
1814 kref_put(&mc->mcref, release_mc);
1815}
1816
1817static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
1818{
1819 struct cma_multicast *mc;
1820
1821 while (!list_empty(&id_priv->mc_list)) {
1822 mc = container_of(id_priv->mc_list.next,
1823 struct cma_multicast, list);
1824 list_del(&mc->list);
1825 if (rdma_cap_ib_mcast(id_priv->cma_dev->device,
1826 id_priv->id.port_num)) {
1827 ib_sa_free_multicast(mc->multicast.ib);
1828 kfree(mc);
1829 } else {
1830 cma_leave_roce_mc_group(id_priv, mc);
1831 }
1832 }
1833}
1834
1835void rdma_destroy_id(struct rdma_cm_id *id)
1836{
1837 struct rdma_id_private *id_priv;
1838 enum rdma_cm_state state;
1839
1840 id_priv = container_of(id, struct rdma_id_private, id);
1841 state = cma_exch(id_priv, RDMA_CM_DESTROYING);
1842 cma_cancel_operation(id_priv, state);
1843
1844 /*
1845 * Wait for any active callback to finish. New callbacks will find
1846 * the id_priv state set to destroying and abort.
1847 */
1848 mutex_lock(&id_priv->handler_mutex);
1849 mutex_unlock(&id_priv->handler_mutex);
1850
1851 rdma_restrack_del(&id_priv->res);
1852 if (id_priv->cma_dev) {
1853 if (rdma_cap_ib_cm(id_priv->id.device, 1)) {
1854 if (id_priv->cm_id.ib)
1855 ib_destroy_cm_id(id_priv->cm_id.ib);
1856 } else if (rdma_cap_iw_cm(id_priv->id.device, 1)) {
1857 if (id_priv->cm_id.iw)
1858 iw_destroy_cm_id(id_priv->cm_id.iw);
1859 }
1860 cma_leave_mc_groups(id_priv);
1861 cma_release_dev(id_priv);
1862 }
1863
1864 cma_release_port(id_priv);
1865 cma_deref_id(id_priv);
1866 wait_for_completion(&id_priv->comp);
1867
1868 if (id_priv->internal_id)
1869 cma_deref_id(id_priv->id.context);
1870
1871 kfree(id_priv->id.route.path_rec);
1872
1873 if (id_priv->id.route.addr.dev_addr.sgid_attr)
1874 rdma_put_gid_attr(id_priv->id.route.addr.dev_addr.sgid_attr);
1875
1876 put_net(id_priv->id.route.addr.dev_addr.net);
1877 kfree(id_priv);
1878}
1879EXPORT_SYMBOL(rdma_destroy_id);
1880
1881static int cma_rep_recv(struct rdma_id_private *id_priv)
1882{
1883 int ret;
1884
1885 ret = cma_modify_qp_rtr(id_priv, NULL);
1886 if (ret)
1887 goto reject;
1888
1889 ret = cma_modify_qp_rts(id_priv, NULL);
1890 if (ret)
1891 goto reject;
1892
1893 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
1894 if (ret)
1895 goto reject;
1896
1897 return 0;
1898reject:
1899 pr_debug_ratelimited("RDMA CM: CONNECT_ERROR: failed to handle reply. status %d\n", ret);
1900 cma_modify_qp_err(id_priv);
1901 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
1902 NULL, 0, NULL, 0);
1903 return ret;
1904}
1905
1906static void cma_set_rep_event_data(struct rdma_cm_event *event,
1907 const struct ib_cm_rep_event_param *rep_data,
1908 void *private_data)
1909{
1910 event->param.conn.private_data = private_data;
1911 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
1912 event->param.conn.responder_resources = rep_data->responder_resources;
1913 event->param.conn.initiator_depth = rep_data->initiator_depth;
1914 event->param.conn.flow_control = rep_data->flow_control;
1915 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
1916 event->param.conn.srq = rep_data->srq;
1917 event->param.conn.qp_num = rep_data->remote_qpn;
1918}
1919
1920static int cma_ib_handler(struct ib_cm_id *cm_id,
1921 const struct ib_cm_event *ib_event)
1922{
1923 struct rdma_id_private *id_priv = cm_id->context;
1924 struct rdma_cm_event event = {};
1925 int ret = 0;
1926
1927 mutex_lock(&id_priv->handler_mutex);
1928 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
1929 id_priv->state != RDMA_CM_CONNECT) ||
1930 (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
1931 id_priv->state != RDMA_CM_DISCONNECT))
1932 goto out;
1933
1934 switch (ib_event->event) {
1935 case IB_CM_REQ_ERROR:
1936 case IB_CM_REP_ERROR:
1937 event.event = RDMA_CM_EVENT_UNREACHABLE;
1938 event.status = -ETIMEDOUT;
1939 break;
1940 case IB_CM_REP_RECEIVED:
1941 if (cma_comp(id_priv, RDMA_CM_CONNECT) &&
1942 (id_priv->id.qp_type != IB_QPT_UD))
1943 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1944 if (id_priv->id.qp) {
1945 event.status = cma_rep_recv(id_priv);
1946 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1947 RDMA_CM_EVENT_ESTABLISHED;
1948 } else {
1949 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
1950 }
1951 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1952 ib_event->private_data);
1953 break;
1954 case IB_CM_RTU_RECEIVED:
1955 case IB_CM_USER_ESTABLISHED:
1956 event.event = RDMA_CM_EVENT_ESTABLISHED;
1957 break;
1958 case IB_CM_DREQ_ERROR:
1959 event.status = -ETIMEDOUT; /* fall through */
1960 case IB_CM_DREQ_RECEIVED:
1961 case IB_CM_DREP_RECEIVED:
1962 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
1963 RDMA_CM_DISCONNECT))
1964 goto out;
1965 event.event = RDMA_CM_EVENT_DISCONNECTED;
1966 break;
1967 case IB_CM_TIMEWAIT_EXIT:
1968 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1969 break;
1970 case IB_CM_MRA_RECEIVED:
1971 /* ignore event */
1972 goto out;
1973 case IB_CM_REJ_RECEIVED:
1974 pr_debug_ratelimited("RDMA CM: REJECTED: %s\n", rdma_reject_msg(&id_priv->id,
1975 ib_event->param.rej_rcvd.reason));
1976 cma_modify_qp_err(id_priv);
1977 event.status = ib_event->param.rej_rcvd.reason;
1978 event.event = RDMA_CM_EVENT_REJECTED;
1979 event.param.conn.private_data = ib_event->private_data;
1980 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
1981 break;
1982 default:
1983 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
1984 ib_event->event);
1985 goto out;
1986 }
1987
1988 ret = id_priv->id.event_handler(&id_priv->id, &event);
1989 if (ret) {
1990 /* Destroy the CM ID by returning a non-zero value. */
1991 id_priv->cm_id.ib = NULL;
1992 cma_exch(id_priv, RDMA_CM_DESTROYING);
1993 mutex_unlock(&id_priv->handler_mutex);
1994 rdma_destroy_id(&id_priv->id);
1995 return ret;
1996 }
1997out:
1998 mutex_unlock(&id_priv->handler_mutex);
1999 return ret;
2000}
2001
2002static struct rdma_id_private *
2003cma_ib_new_conn_id(const struct rdma_cm_id *listen_id,
2004 const struct ib_cm_event *ib_event,
2005 struct net_device *net_dev)
2006{
2007 struct rdma_id_private *listen_id_priv;
2008 struct rdma_id_private *id_priv;
2009 struct rdma_cm_id *id;
2010 struct rdma_route *rt;
2011 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
2012 struct sa_path_rec *path = ib_event->param.req_rcvd.primary_path;
2013 const __be64 service_id =
2014 ib_event->param.req_rcvd.primary_path->service_id;
2015 int ret;
2016
2017 listen_id_priv = container_of(listen_id, struct rdma_id_private, id);
2018 id = __rdma_create_id(listen_id->route.addr.dev_addr.net,
2019 listen_id->event_handler, listen_id->context,
2020 listen_id->ps, ib_event->param.req_rcvd.qp_type,
2021 listen_id_priv->res.kern_name);
2022 if (IS_ERR(id))
2023 return NULL;
2024
2025 id_priv = container_of(id, struct rdma_id_private, id);
2026 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
2027 (struct sockaddr *)&id->route.addr.dst_addr,
2028 listen_id, ib_event, ss_family, service_id))
2029 goto err;
2030
2031 rt = &id->route;
2032 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
2033 rt->path_rec = kmalloc_array(rt->num_paths, sizeof(*rt->path_rec),
2034 GFP_KERNEL);
2035 if (!rt->path_rec)
2036 goto err;
2037
2038 rt->path_rec[0] = *path;
2039 if (rt->num_paths == 2)
2040 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
2041
2042 if (net_dev) {
2043 rdma_copy_src_l2_addr(&rt->addr.dev_addr, net_dev);
2044 } else {
2045 if (!cma_protocol_roce(listen_id) &&
2046 cma_any_addr(cma_src_addr(id_priv))) {
2047 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
2048 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
2049 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
2050 } else if (!cma_any_addr(cma_src_addr(id_priv))) {
2051 ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr);
2052 if (ret)
2053 goto err;
2054 }
2055 }
2056 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
2057
2058 id_priv->state = RDMA_CM_CONNECT;
2059 return id_priv;
2060
2061err:
2062 rdma_destroy_id(id);
2063 return NULL;
2064}
2065
2066static struct rdma_id_private *
2067cma_ib_new_udp_id(const struct rdma_cm_id *listen_id,
2068 const struct ib_cm_event *ib_event,
2069 struct net_device *net_dev)
2070{
2071 const struct rdma_id_private *listen_id_priv;
2072 struct rdma_id_private *id_priv;
2073 struct rdma_cm_id *id;
2074 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
2075 struct net *net = listen_id->route.addr.dev_addr.net;
2076 int ret;
2077
2078 listen_id_priv = container_of(listen_id, struct rdma_id_private, id);
2079 id = __rdma_create_id(net, listen_id->event_handler, listen_id->context,
2080 listen_id->ps, IB_QPT_UD,
2081 listen_id_priv->res.kern_name);
2082 if (IS_ERR(id))
2083 return NULL;
2084
2085 id_priv = container_of(id, struct rdma_id_private, id);
2086 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
2087 (struct sockaddr *)&id->route.addr.dst_addr,
2088 listen_id, ib_event, ss_family,
2089 ib_event->param.sidr_req_rcvd.service_id))
2090 goto err;
2091
2092 if (net_dev) {
2093 rdma_copy_src_l2_addr(&id->route.addr.dev_addr, net_dev);
2094 } else {
2095 if (!cma_any_addr(cma_src_addr(id_priv))) {
2096 ret = cma_translate_addr(cma_src_addr(id_priv),
2097 &id->route.addr.dev_addr);
2098 if (ret)
2099 goto err;
2100 }
2101 }
2102
2103 id_priv->state = RDMA_CM_CONNECT;
2104 return id_priv;
2105err:
2106 rdma_destroy_id(id);
2107 return NULL;
2108}
2109
2110static void cma_set_req_event_data(struct rdma_cm_event *event,
2111 const struct ib_cm_req_event_param *req_data,
2112 void *private_data, int offset)
2113{
2114 event->param.conn.private_data = private_data + offset;
2115 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
2116 event->param.conn.responder_resources = req_data->responder_resources;
2117 event->param.conn.initiator_depth = req_data->initiator_depth;
2118 event->param.conn.flow_control = req_data->flow_control;
2119 event->param.conn.retry_count = req_data->retry_count;
2120 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
2121 event->param.conn.srq = req_data->srq;
2122 event->param.conn.qp_num = req_data->remote_qpn;
2123}
2124
2125static int cma_ib_check_req_qp_type(const struct rdma_cm_id *id,
2126 const struct ib_cm_event *ib_event)
2127{
2128 return (((ib_event->event == IB_CM_REQ_RECEIVED) &&
2129 (ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
2130 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
2131 (id->qp_type == IB_QPT_UD)) ||
2132 (!id->qp_type));
2133}
2134
2135static int cma_ib_req_handler(struct ib_cm_id *cm_id,
2136 const struct ib_cm_event *ib_event)
2137{
2138 struct rdma_id_private *listen_id, *conn_id = NULL;
2139 struct rdma_cm_event event = {};
2140 struct cma_req_info req = {};
2141 struct net_device *net_dev;
2142 u8 offset;
2143 int ret;
2144
2145 listen_id = cma_ib_id_from_event(cm_id, ib_event, &req, &net_dev);
2146 if (IS_ERR(listen_id))
2147 return PTR_ERR(listen_id);
2148
2149 if (!cma_ib_check_req_qp_type(&listen_id->id, ib_event)) {
2150 ret = -EINVAL;
2151 goto net_dev_put;
2152 }
2153
2154 mutex_lock(&listen_id->handler_mutex);
2155 if (listen_id->state != RDMA_CM_LISTEN) {
2156 ret = -ECONNABORTED;
2157 goto err1;
2158 }
2159
2160 offset = cma_user_data_offset(listen_id);
2161 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
2162 if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
2163 conn_id = cma_ib_new_udp_id(&listen_id->id, ib_event, net_dev);
2164 event.param.ud.private_data = ib_event->private_data + offset;
2165 event.param.ud.private_data_len =
2166 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
2167 } else {
2168 conn_id = cma_ib_new_conn_id(&listen_id->id, ib_event, net_dev);
2169 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
2170 ib_event->private_data, offset);
2171 }
2172 if (!conn_id) {
2173 ret = -ENOMEM;
2174 goto err1;
2175 }
2176
2177 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
2178 ret = cma_ib_acquire_dev(conn_id, listen_id, &req);
2179 if (ret)
2180 goto err2;
2181
2182 conn_id->cm_id.ib = cm_id;
2183 cm_id->context = conn_id;
2184 cm_id->cm_handler = cma_ib_handler;
2185
2186 /*
2187 * Protect against the user destroying conn_id from another thread
2188 * until we're done accessing it.
2189 */
2190 atomic_inc(&conn_id->refcount);
2191 ret = conn_id->id.event_handler(&conn_id->id, &event);
2192 if (ret)
2193 goto err3;
2194 /*
2195 * Acquire mutex to prevent user executing rdma_destroy_id()
2196 * while we're accessing the cm_id.
2197 */
2198 mutex_lock(&lock);
2199 if (cma_comp(conn_id, RDMA_CM_CONNECT) &&
2200 (conn_id->id.qp_type != IB_QPT_UD))
2201 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
2202 mutex_unlock(&lock);
2203 mutex_unlock(&conn_id->handler_mutex);
2204 mutex_unlock(&listen_id->handler_mutex);
2205 cma_deref_id(conn_id);
2206 if (net_dev)
2207 dev_put(net_dev);
2208 return 0;
2209
2210err3:
2211 cma_deref_id(conn_id);
2212 /* Destroy the CM ID by returning a non-zero value. */
2213 conn_id->cm_id.ib = NULL;
2214err2:
2215 cma_exch(conn_id, RDMA_CM_DESTROYING);
2216 mutex_unlock(&conn_id->handler_mutex);
2217err1:
2218 mutex_unlock(&listen_id->handler_mutex);
2219 if (conn_id)
2220 rdma_destroy_id(&conn_id->id);
2221
2222net_dev_put:
2223 if (net_dev)
2224 dev_put(net_dev);
2225
2226 return ret;
2227}
2228
2229__be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr)
2230{
2231 if (addr->sa_family == AF_IB)
2232 return ((struct sockaddr_ib *) addr)->sib_sid;
2233
2234 return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr)));
2235}
2236EXPORT_SYMBOL(rdma_get_service_id);
2237
2238void rdma_read_gids(struct rdma_cm_id *cm_id, union ib_gid *sgid,
2239 union ib_gid *dgid)
2240{
2241 struct rdma_addr *addr = &cm_id->route.addr;
2242
2243 if (!cm_id->device) {
2244 if (sgid)
2245 memset(sgid, 0, sizeof(*sgid));
2246 if (dgid)
2247 memset(dgid, 0, sizeof(*dgid));
2248 return;
2249 }
2250
2251 if (rdma_protocol_roce(cm_id->device, cm_id->port_num)) {
2252 if (sgid)
2253 rdma_ip2gid((struct sockaddr *)&addr->src_addr, sgid);
2254 if (dgid)
2255 rdma_ip2gid((struct sockaddr *)&addr->dst_addr, dgid);
2256 } else {
2257 if (sgid)
2258 rdma_addr_get_sgid(&addr->dev_addr, sgid);
2259 if (dgid)
2260 rdma_addr_get_dgid(&addr->dev_addr, dgid);
2261 }
2262}
2263EXPORT_SYMBOL(rdma_read_gids);
2264
2265static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
2266{
2267 struct rdma_id_private *id_priv = iw_id->context;
2268 struct rdma_cm_event event = {};
2269 int ret = 0;
2270 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
2271 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
2272
2273 mutex_lock(&id_priv->handler_mutex);
2274 if (id_priv->state != RDMA_CM_CONNECT)
2275 goto out;
2276
2277 switch (iw_event->event) {
2278 case IW_CM_EVENT_CLOSE:
2279 event.event = RDMA_CM_EVENT_DISCONNECTED;
2280 break;
2281 case IW_CM_EVENT_CONNECT_REPLY:
2282 memcpy(cma_src_addr(id_priv), laddr,
2283 rdma_addr_size(laddr));
2284 memcpy(cma_dst_addr(id_priv), raddr,
2285 rdma_addr_size(raddr));
2286 switch (iw_event->status) {
2287 case 0:
2288 event.event = RDMA_CM_EVENT_ESTABLISHED;
2289 event.param.conn.initiator_depth = iw_event->ird;
2290 event.param.conn.responder_resources = iw_event->ord;
2291 break;
2292 case -ECONNRESET:
2293 case -ECONNREFUSED:
2294 event.event = RDMA_CM_EVENT_REJECTED;
2295 break;
2296 case -ETIMEDOUT:
2297 event.event = RDMA_CM_EVENT_UNREACHABLE;
2298 break;
2299 default:
2300 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
2301 break;
2302 }
2303 break;
2304 case IW_CM_EVENT_ESTABLISHED:
2305 event.event = RDMA_CM_EVENT_ESTABLISHED;
2306 event.param.conn.initiator_depth = iw_event->ird;
2307 event.param.conn.responder_resources = iw_event->ord;
2308 break;
2309 default:
2310 goto out;
2311 }
2312
2313 event.status = iw_event->status;
2314 event.param.conn.private_data = iw_event->private_data;
2315 event.param.conn.private_data_len = iw_event->private_data_len;
2316 ret = id_priv->id.event_handler(&id_priv->id, &event);
2317 if (ret) {
2318 /* Destroy the CM ID by returning a non-zero value. */
2319 id_priv->cm_id.iw = NULL;
2320 cma_exch(id_priv, RDMA_CM_DESTROYING);
2321 mutex_unlock(&id_priv->handler_mutex);
2322 rdma_destroy_id(&id_priv->id);
2323 return ret;
2324 }
2325
2326out:
2327 mutex_unlock(&id_priv->handler_mutex);
2328 return ret;
2329}
2330
2331static int iw_conn_req_handler(struct iw_cm_id *cm_id,
2332 struct iw_cm_event *iw_event)
2333{
2334 struct rdma_cm_id *new_cm_id;
2335 struct rdma_id_private *listen_id, *conn_id;
2336 struct rdma_cm_event event = {};
2337 int ret = -ECONNABORTED;
2338 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
2339 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
2340
2341 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
2342 event.param.conn.private_data = iw_event->private_data;
2343 event.param.conn.private_data_len = iw_event->private_data_len;
2344 event.param.conn.initiator_depth = iw_event->ird;
2345 event.param.conn.responder_resources = iw_event->ord;
2346
2347 listen_id = cm_id->context;
2348
2349 mutex_lock(&listen_id->handler_mutex);
2350 if (listen_id->state != RDMA_CM_LISTEN)
2351 goto out;
2352
2353 /* Create a new RDMA id for the new IW CM ID */
2354 new_cm_id = __rdma_create_id(listen_id->id.route.addr.dev_addr.net,
2355 listen_id->id.event_handler,
2356 listen_id->id.context,
2357 RDMA_PS_TCP, IB_QPT_RC,
2358 listen_id->res.kern_name);
2359 if (IS_ERR(new_cm_id)) {
2360 ret = -ENOMEM;
2361 goto out;
2362 }
2363 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
2364 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
2365 conn_id->state = RDMA_CM_CONNECT;
2366
2367 ret = rdma_translate_ip(laddr, &conn_id->id.route.addr.dev_addr);
2368 if (ret) {
2369 mutex_unlock(&conn_id->handler_mutex);
2370 rdma_destroy_id(new_cm_id);
2371 goto out;
2372 }
2373
2374 ret = cma_iw_acquire_dev(conn_id, listen_id);
2375 if (ret) {
2376 mutex_unlock(&conn_id->handler_mutex);
2377 rdma_destroy_id(new_cm_id);
2378 goto out;
2379 }
2380
2381 conn_id->cm_id.iw = cm_id;
2382 cm_id->context = conn_id;
2383 cm_id->cm_handler = cma_iw_handler;
2384
2385 memcpy(cma_src_addr(conn_id), laddr, rdma_addr_size(laddr));
2386 memcpy(cma_dst_addr(conn_id), raddr, rdma_addr_size(raddr));
2387
2388 /*
2389 * Protect against the user destroying conn_id from another thread
2390 * until we're done accessing it.
2391 */
2392 atomic_inc(&conn_id->refcount);
2393 ret = conn_id->id.event_handler(&conn_id->id, &event);
2394 if (ret) {
2395 /* User wants to destroy the CM ID */
2396 conn_id->cm_id.iw = NULL;
2397 cma_exch(conn_id, RDMA_CM_DESTROYING);
2398 mutex_unlock(&conn_id->handler_mutex);
2399 mutex_unlock(&listen_id->handler_mutex);
2400 cma_deref_id(conn_id);
2401 rdma_destroy_id(&conn_id->id);
2402 return ret;
2403 }
2404
2405 mutex_unlock(&conn_id->handler_mutex);
2406 cma_deref_id(conn_id);
2407
2408out:
2409 mutex_unlock(&listen_id->handler_mutex);
2410 return ret;
2411}
2412
2413static int cma_ib_listen(struct rdma_id_private *id_priv)
2414{
2415 struct sockaddr *addr;
2416 struct ib_cm_id *id;
2417 __be64 svc_id;
2418
2419 addr = cma_src_addr(id_priv);
2420 svc_id = rdma_get_service_id(&id_priv->id, addr);
2421 id = ib_cm_insert_listen(id_priv->id.device,
2422 cma_ib_req_handler, svc_id);
2423 if (IS_ERR(id))
2424 return PTR_ERR(id);
2425 id_priv->cm_id.ib = id;
2426
2427 return 0;
2428}
2429
2430static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
2431{
2432 int ret;
2433 struct iw_cm_id *id;
2434
2435 id = iw_create_cm_id(id_priv->id.device,
2436 iw_conn_req_handler,
2437 id_priv);
2438 if (IS_ERR(id))
2439 return PTR_ERR(id);
2440
2441 id->tos = id_priv->tos;
2442 id->tos_set = id_priv->tos_set;
2443 id_priv->cm_id.iw = id;
2444
2445 memcpy(&id_priv->cm_id.iw->local_addr, cma_src_addr(id_priv),
2446 rdma_addr_size(cma_src_addr(id_priv)));
2447
2448 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
2449
2450 if (ret) {
2451 iw_destroy_cm_id(id_priv->cm_id.iw);
2452 id_priv->cm_id.iw = NULL;
2453 }
2454
2455 return ret;
2456}
2457
2458static int cma_listen_handler(struct rdma_cm_id *id,
2459 struct rdma_cm_event *event)
2460{
2461 struct rdma_id_private *id_priv = id->context;
2462
2463 id->context = id_priv->id.context;
2464 id->event_handler = id_priv->id.event_handler;
2465 return id_priv->id.event_handler(id, event);
2466}
2467
2468static void cma_listen_on_dev(struct rdma_id_private *id_priv,
2469 struct cma_device *cma_dev)
2470{
2471 struct rdma_id_private *dev_id_priv;
2472 struct rdma_cm_id *id;
2473 struct net *net = id_priv->id.route.addr.dev_addr.net;
2474 int ret;
2475
2476 if (cma_family(id_priv) == AF_IB && !rdma_cap_ib_cm(cma_dev->device, 1))
2477 return;
2478
2479 id = __rdma_create_id(net, cma_listen_handler, id_priv, id_priv->id.ps,
2480 id_priv->id.qp_type, id_priv->res.kern_name);
2481 if (IS_ERR(id))
2482 return;
2483
2484 dev_id_priv = container_of(id, struct rdma_id_private, id);
2485
2486 dev_id_priv->state = RDMA_CM_ADDR_BOUND;
2487 memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv),
2488 rdma_addr_size(cma_src_addr(id_priv)));
2489
2490 _cma_attach_to_dev(dev_id_priv, cma_dev);
2491 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
2492 atomic_inc(&id_priv->refcount);
2493 dev_id_priv->internal_id = 1;
2494 dev_id_priv->afonly = id_priv->afonly;
2495 dev_id_priv->tos_set = id_priv->tos_set;
2496 dev_id_priv->tos = id_priv->tos;
2497
2498 ret = rdma_listen(id, id_priv->backlog);
2499 if (ret)
2500 dev_warn(&cma_dev->device->dev,
2501 "RDMA CMA: cma_listen_on_dev, error %d\n", ret);
2502}
2503
2504static void cma_listen_on_all(struct rdma_id_private *id_priv)
2505{
2506 struct cma_device *cma_dev;
2507
2508 mutex_lock(&lock);
2509 list_add_tail(&id_priv->list, &listen_any_list);
2510 list_for_each_entry(cma_dev, &dev_list, list)
2511 cma_listen_on_dev(id_priv, cma_dev);
2512 mutex_unlock(&lock);
2513}
2514
2515void rdma_set_service_type(struct rdma_cm_id *id, int tos)
2516{
2517 struct rdma_id_private *id_priv;
2518
2519 id_priv = container_of(id, struct rdma_id_private, id);
2520 id_priv->tos = (u8) tos;
2521 id_priv->tos_set = true;
2522}
2523EXPORT_SYMBOL(rdma_set_service_type);
2524
2525/**
2526 * rdma_set_ack_timeout() - Set the ack timeout of QP associated
2527 * with a connection identifier.
2528 * @id: Communication identifier to associated with service type.
2529 * @timeout: Ack timeout to set a QP, expressed as 4.096 * 2^(timeout) usec.
2530 *
2531 * This function should be called before rdma_connect() on active side,
2532 * and on passive side before rdma_accept(). It is applicable to primary
2533 * path only. The timeout will affect the local side of the QP, it is not
2534 * negotiated with remote side and zero disables the timer.
2535 *
2536 * Return: 0 for success
2537 */
2538int rdma_set_ack_timeout(struct rdma_cm_id *id, u8 timeout)
2539{
2540 struct rdma_id_private *id_priv;
2541
2542 if (id->qp_type != IB_QPT_RC)
2543 return -EINVAL;
2544
2545 id_priv = container_of(id, struct rdma_id_private, id);
2546 id_priv->timeout = timeout;
2547 id_priv->timeout_set = true;
2548
2549 return 0;
2550}
2551EXPORT_SYMBOL(rdma_set_ack_timeout);
2552
2553static void cma_query_handler(int status, struct sa_path_rec *path_rec,
2554 void *context)
2555{
2556 struct cma_work *work = context;
2557 struct rdma_route *route;
2558
2559 route = &work->id->id.route;
2560
2561 if (!status) {
2562 route->num_paths = 1;
2563 *route->path_rec = *path_rec;
2564 } else {
2565 work->old_state = RDMA_CM_ROUTE_QUERY;
2566 work->new_state = RDMA_CM_ADDR_RESOLVED;
2567 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
2568 work->event.status = status;
2569 pr_debug_ratelimited("RDMA CM: ROUTE_ERROR: failed to query path. status %d\n",
2570 status);
2571 }
2572
2573 queue_work(cma_wq, &work->work);
2574}
2575
2576static int cma_query_ib_route(struct rdma_id_private *id_priv,
2577 unsigned long timeout_ms, struct cma_work *work)
2578{
2579 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2580 struct sa_path_rec path_rec;
2581 ib_sa_comp_mask comp_mask;
2582 struct sockaddr_in6 *sin6;
2583 struct sockaddr_ib *sib;
2584
2585 memset(&path_rec, 0, sizeof path_rec);
2586
2587 if (rdma_cap_opa_ah(id_priv->id.device, id_priv->id.port_num))
2588 path_rec.rec_type = SA_PATH_REC_TYPE_OPA;
2589 else
2590 path_rec.rec_type = SA_PATH_REC_TYPE_IB;
2591 rdma_addr_get_sgid(dev_addr, &path_rec.sgid);
2592 rdma_addr_get_dgid(dev_addr, &path_rec.dgid);
2593 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
2594 path_rec.numb_path = 1;
2595 path_rec.reversible = 1;
2596 path_rec.service_id = rdma_get_service_id(&id_priv->id,
2597 cma_dst_addr(id_priv));
2598
2599 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
2600 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
2601 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
2602
2603 switch (cma_family(id_priv)) {
2604 case AF_INET:
2605 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
2606 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
2607 break;
2608 case AF_INET6:
2609 sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
2610 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
2611 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2612 break;
2613 case AF_IB:
2614 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
2615 path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20);
2616 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2617 break;
2618 }
2619
2620 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
2621 id_priv->id.port_num, &path_rec,
2622 comp_mask, timeout_ms,
2623 GFP_KERNEL, cma_query_handler,
2624 work, &id_priv->query);
2625
2626 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
2627}
2628
2629static void cma_work_handler(struct work_struct *_work)
2630{
2631 struct cma_work *work = container_of(_work, struct cma_work, work);
2632 struct rdma_id_private *id_priv = work->id;
2633 int destroy = 0;
2634
2635 mutex_lock(&id_priv->handler_mutex);
2636 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
2637 goto out;
2638
2639 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
2640 cma_exch(id_priv, RDMA_CM_DESTROYING);
2641 destroy = 1;
2642 }
2643out:
2644 mutex_unlock(&id_priv->handler_mutex);
2645 cma_deref_id(id_priv);
2646 if (destroy)
2647 rdma_destroy_id(&id_priv->id);
2648 kfree(work);
2649}
2650
2651static void cma_ndev_work_handler(struct work_struct *_work)
2652{
2653 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
2654 struct rdma_id_private *id_priv = work->id;
2655 int destroy = 0;
2656
2657 mutex_lock(&id_priv->handler_mutex);
2658 if (id_priv->state == RDMA_CM_DESTROYING ||
2659 id_priv->state == RDMA_CM_DEVICE_REMOVAL)
2660 goto out;
2661
2662 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
2663 cma_exch(id_priv, RDMA_CM_DESTROYING);
2664 destroy = 1;
2665 }
2666
2667out:
2668 mutex_unlock(&id_priv->handler_mutex);
2669 cma_deref_id(id_priv);
2670 if (destroy)
2671 rdma_destroy_id(&id_priv->id);
2672 kfree(work);
2673}
2674
2675static void cma_init_resolve_route_work(struct cma_work *work,
2676 struct rdma_id_private *id_priv)
2677{
2678 work->id = id_priv;
2679 INIT_WORK(&work->work, cma_work_handler);
2680 work->old_state = RDMA_CM_ROUTE_QUERY;
2681 work->new_state = RDMA_CM_ROUTE_RESOLVED;
2682 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2683}
2684
2685static void cma_init_resolve_addr_work(struct cma_work *work,
2686 struct rdma_id_private *id_priv)
2687{
2688 work->id = id_priv;
2689 INIT_WORK(&work->work, cma_work_handler);
2690 work->old_state = RDMA_CM_ADDR_QUERY;
2691 work->new_state = RDMA_CM_ADDR_RESOLVED;
2692 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2693}
2694
2695static int cma_resolve_ib_route(struct rdma_id_private *id_priv,
2696 unsigned long timeout_ms)
2697{
2698 struct rdma_route *route = &id_priv->id.route;
2699 struct cma_work *work;
2700 int ret;
2701
2702 work = kzalloc(sizeof *work, GFP_KERNEL);
2703 if (!work)
2704 return -ENOMEM;
2705
2706 cma_init_resolve_route_work(work, id_priv);
2707
2708 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
2709 if (!route->path_rec) {
2710 ret = -ENOMEM;
2711 goto err1;
2712 }
2713
2714 ret = cma_query_ib_route(id_priv, timeout_ms, work);
2715 if (ret)
2716 goto err2;
2717
2718 return 0;
2719err2:
2720 kfree(route->path_rec);
2721 route->path_rec = NULL;
2722err1:
2723 kfree(work);
2724 return ret;
2725}
2726
2727static enum ib_gid_type cma_route_gid_type(enum rdma_network_type network_type,
2728 unsigned long supported_gids,
2729 enum ib_gid_type default_gid)
2730{
2731 if ((network_type == RDMA_NETWORK_IPV4 ||
2732 network_type == RDMA_NETWORK_IPV6) &&
2733 test_bit(IB_GID_TYPE_ROCE_UDP_ENCAP, &supported_gids))
2734 return IB_GID_TYPE_ROCE_UDP_ENCAP;
2735
2736 return default_gid;
2737}
2738
2739/*
2740 * cma_iboe_set_path_rec_l2_fields() is helper function which sets
2741 * path record type based on GID type.
2742 * It also sets up other L2 fields which includes destination mac address
2743 * netdev ifindex, of the path record.
2744 * It returns the netdev of the bound interface for this path record entry.
2745 */
2746static struct net_device *
2747cma_iboe_set_path_rec_l2_fields(struct rdma_id_private *id_priv)
2748{
2749 struct rdma_route *route = &id_priv->id.route;
2750 enum ib_gid_type gid_type = IB_GID_TYPE_ROCE;
2751 struct rdma_addr *addr = &route->addr;
2752 unsigned long supported_gids;
2753 struct net_device *ndev;
2754
2755 if (!addr->dev_addr.bound_dev_if)
2756 return NULL;
2757
2758 ndev = dev_get_by_index(addr->dev_addr.net,
2759 addr->dev_addr.bound_dev_if);
2760 if (!ndev)
2761 return NULL;
2762
2763 supported_gids = roce_gid_type_mask_support(id_priv->id.device,
2764 id_priv->id.port_num);
2765 gid_type = cma_route_gid_type(addr->dev_addr.network,
2766 supported_gids,
2767 id_priv->gid_type);
2768 /* Use the hint from IP Stack to select GID Type */
2769 if (gid_type < ib_network_to_gid_type(addr->dev_addr.network))
2770 gid_type = ib_network_to_gid_type(addr->dev_addr.network);
2771 route->path_rec->rec_type = sa_conv_gid_to_pathrec_type(gid_type);
2772
2773 route->path_rec->roce.route_resolved = true;
2774 sa_path_set_dmac(route->path_rec, addr->dev_addr.dst_dev_addr);
2775 return ndev;
2776}
2777
2778int rdma_set_ib_path(struct rdma_cm_id *id,
2779 struct sa_path_rec *path_rec)
2780{
2781 struct rdma_id_private *id_priv;
2782 struct net_device *ndev;
2783 int ret;
2784
2785 id_priv = container_of(id, struct rdma_id_private, id);
2786 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2787 RDMA_CM_ROUTE_RESOLVED))
2788 return -EINVAL;
2789
2790 id->route.path_rec = kmemdup(path_rec, sizeof(*path_rec),
2791 GFP_KERNEL);
2792 if (!id->route.path_rec) {
2793 ret = -ENOMEM;
2794 goto err;
2795 }
2796
2797 if (rdma_protocol_roce(id->device, id->port_num)) {
2798 ndev = cma_iboe_set_path_rec_l2_fields(id_priv);
2799 if (!ndev) {
2800 ret = -ENODEV;
2801 goto err_free;
2802 }
2803 dev_put(ndev);
2804 }
2805
2806 id->route.num_paths = 1;
2807 return 0;
2808
2809err_free:
2810 kfree(id->route.path_rec);
2811 id->route.path_rec = NULL;
2812err:
2813 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
2814 return ret;
2815}
2816EXPORT_SYMBOL(rdma_set_ib_path);
2817
2818static int cma_resolve_iw_route(struct rdma_id_private *id_priv)
2819{
2820 struct cma_work *work;
2821
2822 work = kzalloc(sizeof *work, GFP_KERNEL);
2823 if (!work)
2824 return -ENOMEM;
2825
2826 cma_init_resolve_route_work(work, id_priv);
2827 queue_work(cma_wq, &work->work);
2828 return 0;
2829}
2830
2831static int iboe_tos_to_sl(struct net_device *ndev, int tos)
2832{
2833 int prio;
2834 struct net_device *dev;
2835
2836 prio = rt_tos2priority(tos);
2837 dev = is_vlan_dev(ndev) ? vlan_dev_real_dev(ndev) : ndev;
2838 if (dev->num_tc)
2839 return netdev_get_prio_tc_map(dev, prio);
2840
2841#if IS_ENABLED(CONFIG_VLAN_8021Q)
2842 if (is_vlan_dev(ndev))
2843 return (vlan_dev_get_egress_qos_mask(ndev, prio) &
2844 VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
2845#endif
2846 return 0;
2847}
2848
2849static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
2850{
2851 struct rdma_route *route = &id_priv->id.route;
2852 struct rdma_addr *addr = &route->addr;
2853 struct cma_work *work;
2854 int ret;
2855 struct net_device *ndev;
2856
2857 u8 default_roce_tos = id_priv->cma_dev->default_roce_tos[id_priv->id.port_num -
2858 rdma_start_port(id_priv->cma_dev->device)];
2859 u8 tos = id_priv->tos_set ? id_priv->tos : default_roce_tos;
2860
2861
2862 work = kzalloc(sizeof *work, GFP_KERNEL);
2863 if (!work)
2864 return -ENOMEM;
2865
2866 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
2867 if (!route->path_rec) {
2868 ret = -ENOMEM;
2869 goto err1;
2870 }
2871
2872 route->num_paths = 1;
2873
2874 ndev = cma_iboe_set_path_rec_l2_fields(id_priv);
2875 if (!ndev) {
2876 ret = -ENODEV;
2877 goto err2;
2878 }
2879
2880 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
2881 &route->path_rec->sgid);
2882 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.dst_addr,
2883 &route->path_rec->dgid);
2884
2885 if (((struct sockaddr *)&id_priv->id.route.addr.dst_addr)->sa_family != AF_IB)
2886 /* TODO: get the hoplimit from the inet/inet6 device */
2887 route->path_rec->hop_limit = addr->dev_addr.hoplimit;
2888 else
2889 route->path_rec->hop_limit = 1;
2890 route->path_rec->reversible = 1;
2891 route->path_rec->pkey = cpu_to_be16(0xffff);
2892 route->path_rec->mtu_selector = IB_SA_EQ;
2893 route->path_rec->sl = iboe_tos_to_sl(ndev, tos);
2894 route->path_rec->traffic_class = tos;
2895 route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
2896 route->path_rec->rate_selector = IB_SA_EQ;
2897 route->path_rec->rate = iboe_get_rate(ndev);
2898 dev_put(ndev);
2899 route->path_rec->packet_life_time_selector = IB_SA_EQ;
2900 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
2901 if (!route->path_rec->mtu) {
2902 ret = -EINVAL;
2903 goto err2;
2904 }
2905
2906 cma_init_resolve_route_work(work, id_priv);
2907 queue_work(cma_wq, &work->work);
2908
2909 return 0;
2910
2911err2:
2912 kfree(route->path_rec);
2913 route->path_rec = NULL;
2914err1:
2915 kfree(work);
2916 return ret;
2917}
2918
2919int rdma_resolve_route(struct rdma_cm_id *id, unsigned long timeout_ms)
2920{
2921 struct rdma_id_private *id_priv;
2922 int ret;
2923
2924 id_priv = container_of(id, struct rdma_id_private, id);
2925 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
2926 return -EINVAL;
2927
2928 atomic_inc(&id_priv->refcount);
2929 if (rdma_cap_ib_sa(id->device, id->port_num))
2930 ret = cma_resolve_ib_route(id_priv, timeout_ms);
2931 else if (rdma_protocol_roce(id->device, id->port_num))
2932 ret = cma_resolve_iboe_route(id_priv);
2933 else if (rdma_protocol_iwarp(id->device, id->port_num))
2934 ret = cma_resolve_iw_route(id_priv);
2935 else
2936 ret = -ENOSYS;
2937
2938 if (ret)
2939 goto err;
2940
2941 return 0;
2942err:
2943 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
2944 cma_deref_id(id_priv);
2945 return ret;
2946}
2947EXPORT_SYMBOL(rdma_resolve_route);
2948
2949static void cma_set_loopback(struct sockaddr *addr)
2950{
2951 switch (addr->sa_family) {
2952 case AF_INET:
2953 ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
2954 break;
2955 case AF_INET6:
2956 ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr,
2957 0, 0, 0, htonl(1));
2958 break;
2959 default:
2960 ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr,
2961 0, 0, 0, htonl(1));
2962 break;
2963 }
2964}
2965
2966static int cma_bind_loopback(struct rdma_id_private *id_priv)
2967{
2968 struct cma_device *cma_dev, *cur_dev;
2969 union ib_gid gid;
2970 enum ib_port_state port_state;
2971 u16 pkey;
2972 int ret;
2973 u8 p;
2974
2975 cma_dev = NULL;
2976 mutex_lock(&lock);
2977 list_for_each_entry(cur_dev, &dev_list, list) {
2978 if (cma_family(id_priv) == AF_IB &&
2979 !rdma_cap_ib_cm(cur_dev->device, 1))
2980 continue;
2981
2982 if (!cma_dev)
2983 cma_dev = cur_dev;
2984
2985 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
2986 if (!ib_get_cached_port_state(cur_dev->device, p, &port_state) &&
2987 port_state == IB_PORT_ACTIVE) {
2988 cma_dev = cur_dev;
2989 goto port_found;
2990 }
2991 }
2992 }
2993
2994 if (!cma_dev) {
2995 ret = -ENODEV;
2996 goto out;
2997 }
2998
2999 p = 1;
3000
3001port_found:
3002 ret = rdma_query_gid(cma_dev->device, p, 0, &gid);
3003 if (ret)
3004 goto out;
3005
3006 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
3007 if (ret)
3008 goto out;
3009
3010 id_priv->id.route.addr.dev_addr.dev_type =
3011 (rdma_protocol_ib(cma_dev->device, p)) ?
3012 ARPHRD_INFINIBAND : ARPHRD_ETHER;
3013
3014 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
3015 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
3016 id_priv->id.port_num = p;
3017 cma_attach_to_dev(id_priv, cma_dev);
3018 cma_set_loopback(cma_src_addr(id_priv));
3019out:
3020 mutex_unlock(&lock);
3021 return ret;
3022}
3023
3024static void addr_handler(int status, struct sockaddr *src_addr,
3025 struct rdma_dev_addr *dev_addr, void *context)
3026{
3027 struct rdma_id_private *id_priv = context;
3028 struct rdma_cm_event event = {};
3029 struct sockaddr *addr;
3030 struct sockaddr_storage old_addr;
3031
3032 mutex_lock(&id_priv->handler_mutex);
3033 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
3034 RDMA_CM_ADDR_RESOLVED))
3035 goto out;
3036
3037 /*
3038 * Store the previous src address, so that if we fail to acquire
3039 * matching rdma device, old address can be restored back, which helps
3040 * to cancel the cma listen operation correctly.
3041 */
3042 addr = cma_src_addr(id_priv);
3043 memcpy(&old_addr, addr, rdma_addr_size(addr));
3044 memcpy(addr, src_addr, rdma_addr_size(src_addr));
3045 if (!status && !id_priv->cma_dev) {
3046 status = cma_acquire_dev_by_src_ip(id_priv);
3047 if (status)
3048 pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to acquire device. status %d\n",
3049 status);
3050 } else if (status) {
3051 pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to resolve IP. status %d\n", status);
3052 }
3053
3054 if (status) {
3055 memcpy(addr, &old_addr,
3056 rdma_addr_size((struct sockaddr *)&old_addr));
3057 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
3058 RDMA_CM_ADDR_BOUND))
3059 goto out;
3060 event.event = RDMA_CM_EVENT_ADDR_ERROR;
3061 event.status = status;
3062 } else
3063 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
3064
3065 if (id_priv->id.event_handler(&id_priv->id, &event)) {
3066 cma_exch(id_priv, RDMA_CM_DESTROYING);
3067 mutex_unlock(&id_priv->handler_mutex);
3068 rdma_destroy_id(&id_priv->id);
3069 return;
3070 }
3071out:
3072 mutex_unlock(&id_priv->handler_mutex);
3073}
3074
3075static int cma_resolve_loopback(struct rdma_id_private *id_priv)
3076{
3077 struct cma_work *work;
3078 union ib_gid gid;
3079 int ret;
3080
3081 work = kzalloc(sizeof *work, GFP_KERNEL);
3082 if (!work)
3083 return -ENOMEM;
3084
3085 if (!id_priv->cma_dev) {
3086 ret = cma_bind_loopback(id_priv);
3087 if (ret)
3088 goto err;
3089 }
3090
3091 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
3092 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
3093
3094 cma_init_resolve_addr_work(work, id_priv);
3095 queue_work(cma_wq, &work->work);
3096 return 0;
3097err:
3098 kfree(work);
3099 return ret;
3100}
3101
3102static int cma_resolve_ib_addr(struct rdma_id_private *id_priv)
3103{
3104 struct cma_work *work;
3105 int ret;
3106
3107 work = kzalloc(sizeof *work, GFP_KERNEL);
3108 if (!work)
3109 return -ENOMEM;
3110
3111 if (!id_priv->cma_dev) {
3112 ret = cma_resolve_ib_dev(id_priv);
3113 if (ret)
3114 goto err;
3115 }
3116
3117 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *)
3118 &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr));
3119
3120 cma_init_resolve_addr_work(work, id_priv);
3121 queue_work(cma_wq, &work->work);
3122 return 0;
3123err:
3124 kfree(work);
3125 return ret;
3126}
3127
3128static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
3129 const struct sockaddr *dst_addr)
3130{
3131 if (!src_addr || !src_addr->sa_family) {
3132 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
3133 src_addr->sa_family = dst_addr->sa_family;
3134 if (IS_ENABLED(CONFIG_IPV6) &&
3135 dst_addr->sa_family == AF_INET6) {
3136 struct sockaddr_in6 *src_addr6 = (struct sockaddr_in6 *) src_addr;
3137 struct sockaddr_in6 *dst_addr6 = (struct sockaddr_in6 *) dst_addr;
3138 src_addr6->sin6_scope_id = dst_addr6->sin6_scope_id;
3139 if (ipv6_addr_type(&dst_addr6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
3140 id->route.addr.dev_addr.bound_dev_if = dst_addr6->sin6_scope_id;
3141 } else if (dst_addr->sa_family == AF_IB) {
3142 ((struct sockaddr_ib *) src_addr)->sib_pkey =
3143 ((struct sockaddr_ib *) dst_addr)->sib_pkey;
3144 }
3145 }
3146 return rdma_bind_addr(id, src_addr);
3147}
3148
3149int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
3150 const struct sockaddr *dst_addr, unsigned long timeout_ms)
3151{
3152 struct rdma_id_private *id_priv;
3153 int ret;
3154
3155 id_priv = container_of(id, struct rdma_id_private, id);
3156 if (id_priv->state == RDMA_CM_IDLE) {
3157 ret = cma_bind_addr(id, src_addr, dst_addr);
3158 if (ret)
3159 return ret;
3160 }
3161
3162 if (cma_family(id_priv) != dst_addr->sa_family)
3163 return -EINVAL;
3164
3165 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY))
3166 return -EINVAL;
3167
3168 memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr));
3169 if (cma_any_addr(dst_addr)) {
3170 ret = cma_resolve_loopback(id_priv);
3171 } else {
3172 if (dst_addr->sa_family == AF_IB) {
3173 ret = cma_resolve_ib_addr(id_priv);
3174 } else {
3175 ret = rdma_resolve_ip(cma_src_addr(id_priv), dst_addr,
3176 &id->route.addr.dev_addr,
3177 timeout_ms, addr_handler,
3178 false, id_priv);
3179 }
3180 }
3181 if (ret)
3182 goto err;
3183
3184 return 0;
3185err:
3186 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
3187 return ret;
3188}
3189EXPORT_SYMBOL(rdma_resolve_addr);
3190
3191int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
3192{
3193 struct rdma_id_private *id_priv;
3194 unsigned long flags;
3195 int ret;
3196
3197 id_priv = container_of(id, struct rdma_id_private, id);
3198 spin_lock_irqsave(&id_priv->lock, flags);
3199 if (reuse || id_priv->state == RDMA_CM_IDLE) {
3200 id_priv->reuseaddr = reuse;
3201 ret = 0;
3202 } else {
3203 ret = -EINVAL;
3204 }
3205 spin_unlock_irqrestore(&id_priv->lock, flags);
3206 return ret;
3207}
3208EXPORT_SYMBOL(rdma_set_reuseaddr);
3209
3210int rdma_set_afonly(struct rdma_cm_id *id, int afonly)
3211{
3212 struct rdma_id_private *id_priv;
3213 unsigned long flags;
3214 int ret;
3215
3216 id_priv = container_of(id, struct rdma_id_private, id);
3217 spin_lock_irqsave(&id_priv->lock, flags);
3218 if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) {
3219 id_priv->options |= (1 << CMA_OPTION_AFONLY);
3220 id_priv->afonly = afonly;
3221 ret = 0;
3222 } else {
3223 ret = -EINVAL;
3224 }
3225 spin_unlock_irqrestore(&id_priv->lock, flags);
3226 return ret;
3227}
3228EXPORT_SYMBOL(rdma_set_afonly);
3229
3230static void cma_bind_port(struct rdma_bind_list *bind_list,
3231 struct rdma_id_private *id_priv)
3232{
3233 struct sockaddr *addr;
3234 struct sockaddr_ib *sib;
3235 u64 sid, mask;
3236 __be16 port;
3237
3238 addr = cma_src_addr(id_priv);
3239 port = htons(bind_list->port);
3240
3241 switch (addr->sa_family) {
3242 case AF_INET:
3243 ((struct sockaddr_in *) addr)->sin_port = port;
3244 break;
3245 case AF_INET6:
3246 ((struct sockaddr_in6 *) addr)->sin6_port = port;
3247 break;
3248 case AF_IB:
3249 sib = (struct sockaddr_ib *) addr;
3250 sid = be64_to_cpu(sib->sib_sid);
3251 mask = be64_to_cpu(sib->sib_sid_mask);
3252 sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port));
3253 sib->sib_sid_mask = cpu_to_be64(~0ULL);
3254 break;
3255 }
3256 id_priv->bind_list = bind_list;
3257 hlist_add_head(&id_priv->node, &bind_list->owners);
3258}
3259
3260static int cma_alloc_port(enum rdma_ucm_port_space ps,
3261 struct rdma_id_private *id_priv, unsigned short snum)
3262{
3263 struct rdma_bind_list *bind_list;
3264 int ret;
3265
3266 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
3267 if (!bind_list)
3268 return -ENOMEM;
3269
3270 ret = cma_ps_alloc(id_priv->id.route.addr.dev_addr.net, ps, bind_list,
3271 snum);
3272 if (ret < 0)
3273 goto err;
3274
3275 bind_list->ps = ps;
3276 bind_list->port = snum;
3277 cma_bind_port(bind_list, id_priv);
3278 return 0;
3279err:
3280 kfree(bind_list);
3281 return ret == -ENOSPC ? -EADDRNOTAVAIL : ret;
3282}
3283
3284static int cma_port_is_unique(struct rdma_bind_list *bind_list,
3285 struct rdma_id_private *id_priv)
3286{
3287 struct rdma_id_private *cur_id;
3288 struct sockaddr *daddr = cma_dst_addr(id_priv);
3289 struct sockaddr *saddr = cma_src_addr(id_priv);
3290 __be16 dport = cma_port(daddr);
3291
3292 hlist_for_each_entry(cur_id, &bind_list->owners, node) {
3293 struct sockaddr *cur_daddr = cma_dst_addr(cur_id);
3294 struct sockaddr *cur_saddr = cma_src_addr(cur_id);
3295 __be16 cur_dport = cma_port(cur_daddr);
3296
3297 if (id_priv == cur_id)
3298 continue;
3299
3300 /* different dest port -> unique */
3301 if (!cma_any_port(daddr) &&
3302 !cma_any_port(cur_daddr) &&
3303 (dport != cur_dport))
3304 continue;
3305
3306 /* different src address -> unique */
3307 if (!cma_any_addr(saddr) &&
3308 !cma_any_addr(cur_saddr) &&
3309 cma_addr_cmp(saddr, cur_saddr))
3310 continue;
3311
3312 /* different dst address -> unique */
3313 if (!cma_any_addr(daddr) &&
3314 !cma_any_addr(cur_daddr) &&
3315 cma_addr_cmp(daddr, cur_daddr))
3316 continue;
3317
3318 return -EADDRNOTAVAIL;
3319 }
3320 return 0;
3321}
3322
3323static int cma_alloc_any_port(enum rdma_ucm_port_space ps,
3324 struct rdma_id_private *id_priv)
3325{
3326 static unsigned int last_used_port;
3327 int low, high, remaining;
3328 unsigned int rover;
3329 struct net *net = id_priv->id.route.addr.dev_addr.net;
3330
3331 inet_get_local_port_range(net, &low, &high);
3332 remaining = (high - low) + 1;
3333 rover = prandom_u32() % remaining + low;
3334retry:
3335 if (last_used_port != rover) {
3336 struct rdma_bind_list *bind_list;
3337 int ret;
3338
3339 bind_list = cma_ps_find(net, ps, (unsigned short)rover);
3340
3341 if (!bind_list) {
3342 ret = cma_alloc_port(ps, id_priv, rover);
3343 } else {
3344 ret = cma_port_is_unique(bind_list, id_priv);
3345 if (!ret)
3346 cma_bind_port(bind_list, id_priv);
3347 }
3348 /*
3349 * Remember previously used port number in order to avoid
3350 * re-using same port immediately after it is closed.
3351 */
3352 if (!ret)
3353 last_used_port = rover;
3354 if (ret != -EADDRNOTAVAIL)
3355 return ret;
3356 }
3357 if (--remaining) {
3358 rover++;
3359 if ((rover < low) || (rover > high))
3360 rover = low;
3361 goto retry;
3362 }
3363 return -EADDRNOTAVAIL;
3364}
3365
3366/*
3367 * Check that the requested port is available. This is called when trying to
3368 * bind to a specific port, or when trying to listen on a bound port. In
3369 * the latter case, the provided id_priv may already be on the bind_list, but
3370 * we still need to check that it's okay to start listening.
3371 */
3372static int cma_check_port(struct rdma_bind_list *bind_list,
3373 struct rdma_id_private *id_priv, uint8_t reuseaddr)
3374{
3375 struct rdma_id_private *cur_id;
3376 struct sockaddr *addr, *cur_addr;
3377
3378 addr = cma_src_addr(id_priv);
3379 hlist_for_each_entry(cur_id, &bind_list->owners, node) {
3380 if (id_priv == cur_id)
3381 continue;
3382
3383 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr &&
3384 cur_id->reuseaddr)
3385 continue;
3386
3387 cur_addr = cma_src_addr(cur_id);
3388 if (id_priv->afonly && cur_id->afonly &&
3389 (addr->sa_family != cur_addr->sa_family))
3390 continue;
3391
3392 if (cma_any_addr(addr) || cma_any_addr(cur_addr))
3393 return -EADDRNOTAVAIL;
3394
3395 if (!cma_addr_cmp(addr, cur_addr))
3396 return -EADDRINUSE;
3397 }
3398 return 0;
3399}
3400
3401static int cma_use_port(enum rdma_ucm_port_space ps,
3402 struct rdma_id_private *id_priv)
3403{
3404 struct rdma_bind_list *bind_list;
3405 unsigned short snum;
3406 int ret;
3407
3408 snum = ntohs(cma_port(cma_src_addr(id_priv)));
3409 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
3410 return -EACCES;
3411
3412 bind_list = cma_ps_find(id_priv->id.route.addr.dev_addr.net, ps, snum);
3413 if (!bind_list) {
3414 ret = cma_alloc_port(ps, id_priv, snum);
3415 } else {
3416 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
3417 if (!ret)
3418 cma_bind_port(bind_list, id_priv);
3419 }
3420 return ret;
3421}
3422
3423static int cma_bind_listen(struct rdma_id_private *id_priv)
3424{
3425 struct rdma_bind_list *bind_list = id_priv->bind_list;
3426 int ret = 0;
3427
3428 mutex_lock(&lock);
3429 if (bind_list->owners.first->next)
3430 ret = cma_check_port(bind_list, id_priv, 0);
3431 mutex_unlock(&lock);
3432 return ret;
3433}
3434
3435static enum rdma_ucm_port_space
3436cma_select_inet_ps(struct rdma_id_private *id_priv)
3437{
3438 switch (id_priv->id.ps) {
3439 case RDMA_PS_TCP:
3440 case RDMA_PS_UDP:
3441 case RDMA_PS_IPOIB:
3442 case RDMA_PS_IB:
3443 return id_priv->id.ps;
3444 default:
3445
3446 return 0;
3447 }
3448}
3449
3450static enum rdma_ucm_port_space
3451cma_select_ib_ps(struct rdma_id_private *id_priv)
3452{
3453 enum rdma_ucm_port_space ps = 0;
3454 struct sockaddr_ib *sib;
3455 u64 sid_ps, mask, sid;
3456
3457 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
3458 mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK;
3459 sid = be64_to_cpu(sib->sib_sid) & mask;
3460
3461 if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) {
3462 sid_ps = RDMA_IB_IP_PS_IB;
3463 ps = RDMA_PS_IB;
3464 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) &&
3465 (sid == (RDMA_IB_IP_PS_TCP & mask))) {
3466 sid_ps = RDMA_IB_IP_PS_TCP;
3467 ps = RDMA_PS_TCP;
3468 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) &&
3469 (sid == (RDMA_IB_IP_PS_UDP & mask))) {
3470 sid_ps = RDMA_IB_IP_PS_UDP;
3471 ps = RDMA_PS_UDP;
3472 }
3473
3474 if (ps) {
3475 sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib)));
3476 sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK |
3477 be64_to_cpu(sib->sib_sid_mask));
3478 }
3479 return ps;
3480}
3481
3482static int cma_get_port(struct rdma_id_private *id_priv)
3483{
3484 enum rdma_ucm_port_space ps;
3485 int ret;
3486
3487 if (cma_family(id_priv) != AF_IB)
3488 ps = cma_select_inet_ps(id_priv);
3489 else
3490 ps = cma_select_ib_ps(id_priv);
3491 if (!ps)
3492 return -EPROTONOSUPPORT;
3493
3494 mutex_lock(&lock);
3495 if (cma_any_port(cma_src_addr(id_priv)))
3496 ret = cma_alloc_any_port(ps, id_priv);
3497 else
3498 ret = cma_use_port(ps, id_priv);
3499 mutex_unlock(&lock);
3500
3501 return ret;
3502}
3503
3504static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
3505 struct sockaddr *addr)
3506{
3507#if IS_ENABLED(CONFIG_IPV6)
3508 struct sockaddr_in6 *sin6;
3509
3510 if (addr->sa_family != AF_INET6)
3511 return 0;
3512
3513 sin6 = (struct sockaddr_in6 *) addr;
3514
3515 if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL))
3516 return 0;
3517
3518 if (!sin6->sin6_scope_id)
3519 return -EINVAL;
3520
3521 dev_addr->bound_dev_if = sin6->sin6_scope_id;
3522#endif
3523 return 0;
3524}
3525
3526int rdma_listen(struct rdma_cm_id *id, int backlog)
3527{
3528 struct rdma_id_private *id_priv;
3529 int ret;
3530
3531 id_priv = container_of(id, struct rdma_id_private, id);
3532 if (id_priv->state == RDMA_CM_IDLE) {
3533 id->route.addr.src_addr.ss_family = AF_INET;
3534 ret = rdma_bind_addr(id, cma_src_addr(id_priv));
3535 if (ret)
3536 return ret;
3537 }
3538
3539 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
3540 return -EINVAL;
3541
3542 if (id_priv->reuseaddr) {
3543 ret = cma_bind_listen(id_priv);
3544 if (ret)
3545 goto err;
3546 }
3547
3548 id_priv->backlog = backlog;
3549 if (id->device) {
3550 if (rdma_cap_ib_cm(id->device, 1)) {
3551 ret = cma_ib_listen(id_priv);
3552 if (ret)
3553 goto err;
3554 } else if (rdma_cap_iw_cm(id->device, 1)) {
3555 ret = cma_iw_listen(id_priv, backlog);
3556 if (ret)
3557 goto err;
3558 } else {
3559 ret = -ENOSYS;
3560 goto err;
3561 }
3562 } else
3563 cma_listen_on_all(id_priv);
3564
3565 return 0;
3566err:
3567 id_priv->backlog = 0;
3568 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
3569 return ret;
3570}
3571EXPORT_SYMBOL(rdma_listen);
3572
3573int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
3574{
3575 struct rdma_id_private *id_priv;
3576 int ret;
3577 struct sockaddr *daddr;
3578
3579 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 &&
3580 addr->sa_family != AF_IB)
3581 return -EAFNOSUPPORT;
3582
3583 id_priv = container_of(id, struct rdma_id_private, id);
3584 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
3585 return -EINVAL;
3586
3587 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
3588 if (ret)
3589 goto err1;
3590
3591 memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr));
3592 if (!cma_any_addr(addr)) {
3593 ret = cma_translate_addr(addr, &id->route.addr.dev_addr);
3594 if (ret)
3595 goto err1;
3596
3597 ret = cma_acquire_dev_by_src_ip(id_priv);
3598 if (ret)
3599 goto err1;
3600 }
3601
3602 if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) {
3603 if (addr->sa_family == AF_INET)
3604 id_priv->afonly = 1;
3605#if IS_ENABLED(CONFIG_IPV6)
3606 else if (addr->sa_family == AF_INET6) {
3607 struct net *net = id_priv->id.route.addr.dev_addr.net;
3608
3609 id_priv->afonly = net->ipv6.sysctl.bindv6only;
3610 }
3611#endif
3612 }
3613 daddr = cma_dst_addr(id_priv);
3614 daddr->sa_family = addr->sa_family;
3615
3616 ret = cma_get_port(id_priv);
3617 if (ret)
3618 goto err2;
3619
3620 return 0;
3621err2:
3622 rdma_restrack_del(&id_priv->res);
3623 if (id_priv->cma_dev)
3624 cma_release_dev(id_priv);
3625err1:
3626 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
3627 return ret;
3628}
3629EXPORT_SYMBOL(rdma_bind_addr);
3630
3631static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv)
3632{
3633 struct cma_hdr *cma_hdr;
3634
3635 cma_hdr = hdr;
3636 cma_hdr->cma_version = CMA_VERSION;
3637 if (cma_family(id_priv) == AF_INET) {
3638 struct sockaddr_in *src4, *dst4;
3639
3640 src4 = (struct sockaddr_in *) cma_src_addr(id_priv);
3641 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv);
3642
3643 cma_set_ip_ver(cma_hdr, 4);
3644 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
3645 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
3646 cma_hdr->port = src4->sin_port;
3647 } else if (cma_family(id_priv) == AF_INET6) {
3648 struct sockaddr_in6 *src6, *dst6;
3649
3650 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
3651 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv);
3652
3653 cma_set_ip_ver(cma_hdr, 6);
3654 cma_hdr->src_addr.ip6 = src6->sin6_addr;
3655 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
3656 cma_hdr->port = src6->sin6_port;
3657 }
3658 return 0;
3659}
3660
3661static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
3662 const struct ib_cm_event *ib_event)
3663{
3664 struct rdma_id_private *id_priv = cm_id->context;
3665 struct rdma_cm_event event = {};
3666 const struct ib_cm_sidr_rep_event_param *rep =
3667 &ib_event->param.sidr_rep_rcvd;
3668 int ret = 0;
3669
3670 mutex_lock(&id_priv->handler_mutex);
3671 if (id_priv->state != RDMA_CM_CONNECT)
3672 goto out;
3673
3674 switch (ib_event->event) {
3675 case IB_CM_SIDR_REQ_ERROR:
3676 event.event = RDMA_CM_EVENT_UNREACHABLE;
3677 event.status = -ETIMEDOUT;
3678 break;
3679 case IB_CM_SIDR_REP_RECEIVED:
3680 event.param.ud.private_data = ib_event->private_data;
3681 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
3682 if (rep->status != IB_SIDR_SUCCESS) {
3683 event.event = RDMA_CM_EVENT_UNREACHABLE;
3684 event.status = ib_event->param.sidr_rep_rcvd.status;
3685 pr_debug_ratelimited("RDMA CM: UNREACHABLE: bad SIDR reply. status %d\n",
3686 event.status);
3687 break;
3688 }
3689 ret = cma_set_qkey(id_priv, rep->qkey);
3690 if (ret) {
3691 pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to set qkey. status %d\n", ret);
3692 event.event = RDMA_CM_EVENT_ADDR_ERROR;
3693 event.status = ret;
3694 break;
3695 }
3696 ib_init_ah_attr_from_path(id_priv->id.device,
3697 id_priv->id.port_num,
3698 id_priv->id.route.path_rec,
3699 &event.param.ud.ah_attr,
3700 rep->sgid_attr);
3701 event.param.ud.qp_num = rep->qpn;
3702 event.param.ud.qkey = rep->qkey;
3703 event.event = RDMA_CM_EVENT_ESTABLISHED;
3704 event.status = 0;
3705 break;
3706 default:
3707 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
3708 ib_event->event);
3709 goto out;
3710 }
3711
3712 ret = id_priv->id.event_handler(&id_priv->id, &event);
3713
3714 rdma_destroy_ah_attr(&event.param.ud.ah_attr);
3715 if (ret) {
3716 /* Destroy the CM ID by returning a non-zero value. */
3717 id_priv->cm_id.ib = NULL;
3718 cma_exch(id_priv, RDMA_CM_DESTROYING);
3719 mutex_unlock(&id_priv->handler_mutex);
3720 rdma_destroy_id(&id_priv->id);
3721 return ret;
3722 }
3723out:
3724 mutex_unlock(&id_priv->handler_mutex);
3725 return ret;
3726}
3727
3728static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
3729 struct rdma_conn_param *conn_param)
3730{
3731 struct ib_cm_sidr_req_param req;
3732 struct ib_cm_id *id;
3733 void *private_data;
3734 u8 offset;
3735 int ret;
3736
3737 memset(&req, 0, sizeof req);
3738 offset = cma_user_data_offset(id_priv);
3739 req.private_data_len = offset + conn_param->private_data_len;
3740 if (req.private_data_len < conn_param->private_data_len)
3741 return -EINVAL;
3742
3743 if (req.private_data_len) {
3744 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3745 if (!private_data)
3746 return -ENOMEM;
3747 } else {
3748 private_data = NULL;
3749 }
3750
3751 if (conn_param->private_data && conn_param->private_data_len)
3752 memcpy(private_data + offset, conn_param->private_data,
3753 conn_param->private_data_len);
3754
3755 if (private_data) {
3756 ret = cma_format_hdr(private_data, id_priv);
3757 if (ret)
3758 goto out;
3759 req.private_data = private_data;
3760 }
3761
3762 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
3763 id_priv);
3764 if (IS_ERR(id)) {
3765 ret = PTR_ERR(id);
3766 goto out;
3767 }
3768 id_priv->cm_id.ib = id;
3769
3770 req.path = id_priv->id.route.path_rec;
3771 req.sgid_attr = id_priv->id.route.addr.dev_addr.sgid_attr;
3772 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
3773 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
3774 req.max_cm_retries = CMA_MAX_CM_RETRIES;
3775
3776 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
3777 if (ret) {
3778 ib_destroy_cm_id(id_priv->cm_id.ib);
3779 id_priv->cm_id.ib = NULL;
3780 }
3781out:
3782 kfree(private_data);
3783 return ret;
3784}
3785
3786static int cma_connect_ib(struct rdma_id_private *id_priv,
3787 struct rdma_conn_param *conn_param)
3788{
3789 struct ib_cm_req_param req;
3790 struct rdma_route *route;
3791 void *private_data;
3792 struct ib_cm_id *id;
3793 u8 offset;
3794 int ret;
3795
3796 memset(&req, 0, sizeof req);
3797 offset = cma_user_data_offset(id_priv);
3798 req.private_data_len = offset + conn_param->private_data_len;
3799 if (req.private_data_len < conn_param->private_data_len)
3800 return -EINVAL;
3801
3802 if (req.private_data_len) {
3803 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3804 if (!private_data)
3805 return -ENOMEM;
3806 } else {
3807 private_data = NULL;
3808 }
3809
3810 if (conn_param->private_data && conn_param->private_data_len)
3811 memcpy(private_data + offset, conn_param->private_data,
3812 conn_param->private_data_len);
3813
3814 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
3815 if (IS_ERR(id)) {
3816 ret = PTR_ERR(id);
3817 goto out;
3818 }
3819 id_priv->cm_id.ib = id;
3820
3821 route = &id_priv->id.route;
3822 if (private_data) {
3823 ret = cma_format_hdr(private_data, id_priv);
3824 if (ret)
3825 goto out;
3826 req.private_data = private_data;
3827 }
3828
3829 req.primary_path = &route->path_rec[0];
3830 if (route->num_paths == 2)
3831 req.alternate_path = &route->path_rec[1];
3832
3833 req.ppath_sgid_attr = id_priv->id.route.addr.dev_addr.sgid_attr;
3834 /* Alternate path SGID attribute currently unsupported */
3835 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
3836 req.qp_num = id_priv->qp_num;
3837 req.qp_type = id_priv->id.qp_type;
3838 req.starting_psn = id_priv->seq_num;
3839 req.responder_resources = conn_param->responder_resources;
3840 req.initiator_depth = conn_param->initiator_depth;
3841 req.flow_control = conn_param->flow_control;
3842 req.retry_count = min_t(u8, 7, conn_param->retry_count);
3843 req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
3844 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3845 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3846 req.max_cm_retries = CMA_MAX_CM_RETRIES;
3847 req.srq = id_priv->srq ? 1 : 0;
3848
3849 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
3850out:
3851 if (ret && !IS_ERR(id)) {
3852 ib_destroy_cm_id(id);
3853 id_priv->cm_id.ib = NULL;
3854 }
3855
3856 kfree(private_data);
3857 return ret;
3858}
3859
3860static int cma_connect_iw(struct rdma_id_private *id_priv,
3861 struct rdma_conn_param *conn_param)
3862{
3863 struct iw_cm_id *cm_id;
3864 int ret;
3865 struct iw_cm_conn_param iw_param;
3866
3867 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
3868 if (IS_ERR(cm_id))
3869 return PTR_ERR(cm_id);
3870
3871 cm_id->tos = id_priv->tos;
3872 cm_id->tos_set = id_priv->tos_set;
3873 id_priv->cm_id.iw = cm_id;
3874
3875 memcpy(&cm_id->local_addr, cma_src_addr(id_priv),
3876 rdma_addr_size(cma_src_addr(id_priv)));
3877 memcpy(&cm_id->remote_addr, cma_dst_addr(id_priv),
3878 rdma_addr_size(cma_dst_addr(id_priv)));
3879
3880 ret = cma_modify_qp_rtr(id_priv, conn_param);
3881 if (ret)
3882 goto out;
3883
3884 if (conn_param) {
3885 iw_param.ord = conn_param->initiator_depth;
3886 iw_param.ird = conn_param->responder_resources;
3887 iw_param.private_data = conn_param->private_data;
3888 iw_param.private_data_len = conn_param->private_data_len;
3889 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
3890 } else {
3891 memset(&iw_param, 0, sizeof iw_param);
3892 iw_param.qpn = id_priv->qp_num;
3893 }
3894 ret = iw_cm_connect(cm_id, &iw_param);
3895out:
3896 if (ret) {
3897 iw_destroy_cm_id(cm_id);
3898 id_priv->cm_id.iw = NULL;
3899 }
3900 return ret;
3901}
3902
3903int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
3904{
3905 struct rdma_id_private *id_priv;
3906 int ret;
3907
3908 id_priv = container_of(id, struct rdma_id_private, id);
3909 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
3910 return -EINVAL;
3911
3912 if (!id->qp) {
3913 id_priv->qp_num = conn_param->qp_num;
3914 id_priv->srq = conn_param->srq;
3915 }
3916
3917 if (rdma_cap_ib_cm(id->device, id->port_num)) {
3918 if (id->qp_type == IB_QPT_UD)
3919 ret = cma_resolve_ib_udp(id_priv, conn_param);
3920 else
3921 ret = cma_connect_ib(id_priv, conn_param);
3922 } else if (rdma_cap_iw_cm(id->device, id->port_num))
3923 ret = cma_connect_iw(id_priv, conn_param);
3924 else
3925 ret = -ENOSYS;
3926 if (ret)
3927 goto err;
3928
3929 return 0;
3930err:
3931 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
3932 return ret;
3933}
3934EXPORT_SYMBOL(rdma_connect);
3935
3936static int cma_accept_ib(struct rdma_id_private *id_priv,
3937 struct rdma_conn_param *conn_param)
3938{
3939 struct ib_cm_rep_param rep;
3940 int ret;
3941
3942 ret = cma_modify_qp_rtr(id_priv, conn_param);
3943 if (ret)
3944 goto out;
3945
3946 ret = cma_modify_qp_rts(id_priv, conn_param);
3947 if (ret)
3948 goto out;
3949
3950 memset(&rep, 0, sizeof rep);
3951 rep.qp_num = id_priv->qp_num;
3952 rep.starting_psn = id_priv->seq_num;
3953 rep.private_data = conn_param->private_data;
3954 rep.private_data_len = conn_param->private_data_len;
3955 rep.responder_resources = conn_param->responder_resources;
3956 rep.initiator_depth = conn_param->initiator_depth;
3957 rep.failover_accepted = 0;
3958 rep.flow_control = conn_param->flow_control;
3959 rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
3960 rep.srq = id_priv->srq ? 1 : 0;
3961
3962 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
3963out:
3964 return ret;
3965}
3966
3967static int cma_accept_iw(struct rdma_id_private *id_priv,
3968 struct rdma_conn_param *conn_param)
3969{
3970 struct iw_cm_conn_param iw_param;
3971 int ret;
3972
3973 if (!conn_param)
3974 return -EINVAL;
3975
3976 ret = cma_modify_qp_rtr(id_priv, conn_param);
3977 if (ret)
3978 return ret;
3979
3980 iw_param.ord = conn_param->initiator_depth;
3981 iw_param.ird = conn_param->responder_resources;
3982 iw_param.private_data = conn_param->private_data;
3983 iw_param.private_data_len = conn_param->private_data_len;
3984 if (id_priv->id.qp) {
3985 iw_param.qpn = id_priv->qp_num;
3986 } else
3987 iw_param.qpn = conn_param->qp_num;
3988
3989 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
3990}
3991
3992static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
3993 enum ib_cm_sidr_status status, u32 qkey,
3994 const void *private_data, int private_data_len)
3995{
3996 struct ib_cm_sidr_rep_param rep;
3997 int ret;
3998
3999 memset(&rep, 0, sizeof rep);
4000 rep.status = status;
4001 if (status == IB_SIDR_SUCCESS) {
4002 ret = cma_set_qkey(id_priv, qkey);
4003 if (ret)
4004 return ret;
4005 rep.qp_num = id_priv->qp_num;
4006 rep.qkey = id_priv->qkey;
4007 }
4008 rep.private_data = private_data;
4009 rep.private_data_len = private_data_len;
4010
4011 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
4012}
4013
4014int __rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param,
4015 const char *caller)
4016{
4017 struct rdma_id_private *id_priv;
4018 int ret;
4019
4020 id_priv = container_of(id, struct rdma_id_private, id);
4021
4022 rdma_restrack_set_task(&id_priv->res, caller);
4023
4024 if (!cma_comp(id_priv, RDMA_CM_CONNECT))
4025 return -EINVAL;
4026
4027 if (!id->qp && conn_param) {
4028 id_priv->qp_num = conn_param->qp_num;
4029 id_priv->srq = conn_param->srq;
4030 }
4031
4032 if (rdma_cap_ib_cm(id->device, id->port_num)) {
4033 if (id->qp_type == IB_QPT_UD) {
4034 if (conn_param)
4035 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
4036 conn_param->qkey,
4037 conn_param->private_data,
4038 conn_param->private_data_len);
4039 else
4040 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
4041 0, NULL, 0);
4042 } else {
4043 if (conn_param)
4044 ret = cma_accept_ib(id_priv, conn_param);
4045 else
4046 ret = cma_rep_recv(id_priv);
4047 }
4048 } else if (rdma_cap_iw_cm(id->device, id->port_num))
4049 ret = cma_accept_iw(id_priv, conn_param);
4050 else
4051 ret = -ENOSYS;
4052
4053 if (ret)
4054 goto reject;
4055
4056 return 0;
4057reject:
4058 cma_modify_qp_err(id_priv);
4059 rdma_reject(id, NULL, 0);
4060 return ret;
4061}
4062EXPORT_SYMBOL(__rdma_accept);
4063
4064int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
4065{
4066 struct rdma_id_private *id_priv;
4067 int ret;
4068
4069 id_priv = container_of(id, struct rdma_id_private, id);
4070 if (!id_priv->cm_id.ib)
4071 return -EINVAL;
4072
4073 switch (id->device->node_type) {
4074 case RDMA_NODE_IB_CA:
4075 ret = ib_cm_notify(id_priv->cm_id.ib, event);
4076 break;
4077 default:
4078 ret = 0;
4079 break;
4080 }
4081 return ret;
4082}
4083EXPORT_SYMBOL(rdma_notify);
4084
4085int rdma_reject(struct rdma_cm_id *id, const void *private_data,
4086 u8 private_data_len)
4087{
4088 struct rdma_id_private *id_priv;
4089 int ret;
4090
4091 id_priv = container_of(id, struct rdma_id_private, id);
4092 if (!id_priv->cm_id.ib)
4093 return -EINVAL;
4094
4095 if (rdma_cap_ib_cm(id->device, id->port_num)) {
4096 if (id->qp_type == IB_QPT_UD)
4097 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0,
4098 private_data, private_data_len);
4099 else
4100 ret = ib_send_cm_rej(id_priv->cm_id.ib,
4101 IB_CM_REJ_CONSUMER_DEFINED, NULL,
4102 0, private_data, private_data_len);
4103 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
4104 ret = iw_cm_reject(id_priv->cm_id.iw,
4105 private_data, private_data_len);
4106 } else
4107 ret = -ENOSYS;
4108
4109 return ret;
4110}
4111EXPORT_SYMBOL(rdma_reject);
4112
4113int rdma_disconnect(struct rdma_cm_id *id)
4114{
4115 struct rdma_id_private *id_priv;
4116 int ret;
4117
4118 id_priv = container_of(id, struct rdma_id_private, id);
4119 if (!id_priv->cm_id.ib)
4120 return -EINVAL;
4121
4122 if (rdma_cap_ib_cm(id->device, id->port_num)) {
4123 ret = cma_modify_qp_err(id_priv);
4124 if (ret)
4125 goto out;
4126 /* Initiate or respond to a disconnect. */
4127 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
4128 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
4129 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
4130 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
4131 } else
4132 ret = -EINVAL;
4133
4134out:
4135 return ret;
4136}
4137EXPORT_SYMBOL(rdma_disconnect);
4138
4139static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
4140{
4141 struct rdma_id_private *id_priv;
4142 struct cma_multicast *mc = multicast->context;
4143 struct rdma_cm_event event = {};
4144 int ret = 0;
4145
4146 id_priv = mc->id_priv;
4147 mutex_lock(&id_priv->handler_mutex);
4148 if (id_priv->state != RDMA_CM_ADDR_BOUND &&
4149 id_priv->state != RDMA_CM_ADDR_RESOLVED)
4150 goto out;
4151
4152 if (!status)
4153 status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey));
4154 else
4155 pr_debug_ratelimited("RDMA CM: MULTICAST_ERROR: failed to join multicast. status %d\n",
4156 status);
4157 mutex_lock(&id_priv->qp_mutex);
4158 if (!status && id_priv->id.qp) {
4159 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
4160 be16_to_cpu(multicast->rec.mlid));
4161 if (status)
4162 pr_debug_ratelimited("RDMA CM: MULTICAST_ERROR: failed to attach QP. status %d\n",
4163 status);
4164 }
4165 mutex_unlock(&id_priv->qp_mutex);
4166
4167 event.status = status;
4168 event.param.ud.private_data = mc->context;
4169 if (!status) {
4170 struct rdma_dev_addr *dev_addr =
4171 &id_priv->id.route.addr.dev_addr;
4172 struct net_device *ndev =
4173 dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
4174 enum ib_gid_type gid_type =
4175 id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
4176 rdma_start_port(id_priv->cma_dev->device)];
4177
4178 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
4179 ret = ib_init_ah_from_mcmember(id_priv->id.device,
4180 id_priv->id.port_num,
4181 &multicast->rec,
4182 ndev, gid_type,
4183 &event.param.ud.ah_attr);
4184 if (ret)
4185 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
4186
4187 event.param.ud.qp_num = 0xFFFFFF;
4188 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
4189 if (ndev)
4190 dev_put(ndev);
4191 } else
4192 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
4193
4194 ret = id_priv->id.event_handler(&id_priv->id, &event);
4195
4196 rdma_destroy_ah_attr(&event.param.ud.ah_attr);
4197 if (ret) {
4198 cma_exch(id_priv, RDMA_CM_DESTROYING);
4199 mutex_unlock(&id_priv->handler_mutex);
4200 rdma_destroy_id(&id_priv->id);
4201 return 0;
4202 }
4203
4204out:
4205 mutex_unlock(&id_priv->handler_mutex);
4206 return 0;
4207}
4208
4209static void cma_set_mgid(struct rdma_id_private *id_priv,
4210 struct sockaddr *addr, union ib_gid *mgid)
4211{
4212 unsigned char mc_map[MAX_ADDR_LEN];
4213 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
4214 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
4215 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
4216
4217 if (cma_any_addr(addr)) {
4218 memset(mgid, 0, sizeof *mgid);
4219 } else if ((addr->sa_family == AF_INET6) &&
4220 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
4221 0xFF10A01B)) {
4222 /* IPv6 address is an SA assigned MGID. */
4223 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
4224 } else if (addr->sa_family == AF_IB) {
4225 memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid);
4226 } else if (addr->sa_family == AF_INET6) {
4227 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
4228 if (id_priv->id.ps == RDMA_PS_UDP)
4229 mc_map[7] = 0x01; /* Use RDMA CM signature */
4230 *mgid = *(union ib_gid *) (mc_map + 4);
4231 } else {
4232 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
4233 if (id_priv->id.ps == RDMA_PS_UDP)
4234 mc_map[7] = 0x01; /* Use RDMA CM signature */
4235 *mgid = *(union ib_gid *) (mc_map + 4);
4236 }
4237}
4238
4239static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
4240 struct cma_multicast *mc)
4241{
4242 struct ib_sa_mcmember_rec rec;
4243 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
4244 ib_sa_comp_mask comp_mask;
4245 int ret;
4246
4247 ib_addr_get_mgid(dev_addr, &rec.mgid);
4248 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
4249 &rec.mgid, &rec);
4250 if (ret)
4251 return ret;
4252
4253 ret = cma_set_qkey(id_priv, 0);
4254 if (ret)
4255 return ret;
4256
4257 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
4258 rec.qkey = cpu_to_be32(id_priv->qkey);
4259 rdma_addr_get_sgid(dev_addr, &rec.port_gid);
4260 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
4261 rec.join_state = mc->join_state;
4262
4263 if ((rec.join_state == BIT(SENDONLY_FULLMEMBER_JOIN)) &&
4264 (!ib_sa_sendonly_fullmem_support(&sa_client,
4265 id_priv->id.device,
4266 id_priv->id.port_num))) {
4267 dev_warn(
4268 &id_priv->id.device->dev,
4269 "RDMA CM: port %u Unable to multicast join: SM doesn't support Send Only Full Member option\n",
4270 id_priv->id.port_num);
4271 return -EOPNOTSUPP;
4272 }
4273
4274 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
4275 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
4276 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
4277 IB_SA_MCMEMBER_REC_FLOW_LABEL |
4278 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
4279
4280 if (id_priv->id.ps == RDMA_PS_IPOIB)
4281 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
4282 IB_SA_MCMEMBER_REC_RATE_SELECTOR |
4283 IB_SA_MCMEMBER_REC_MTU_SELECTOR |
4284 IB_SA_MCMEMBER_REC_MTU |
4285 IB_SA_MCMEMBER_REC_HOP_LIMIT;
4286
4287 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
4288 id_priv->id.port_num, &rec,
4289 comp_mask, GFP_KERNEL,
4290 cma_ib_mc_handler, mc);
4291 return PTR_ERR_OR_ZERO(mc->multicast.ib);
4292}
4293
4294static void iboe_mcast_work_handler(struct work_struct *work)
4295{
4296 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
4297 struct cma_multicast *mc = mw->mc;
4298 struct ib_sa_multicast *m = mc->multicast.ib;
4299
4300 mc->multicast.ib->context = mc;
4301 cma_ib_mc_handler(0, m);
4302 kref_put(&mc->mcref, release_mc);
4303 kfree(mw);
4304}
4305
4306static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid,
4307 enum ib_gid_type gid_type)
4308{
4309 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
4310 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
4311
4312 if (cma_any_addr(addr)) {
4313 memset(mgid, 0, sizeof *mgid);
4314 } else if (addr->sa_family == AF_INET6) {
4315 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
4316 } else {
4317 mgid->raw[0] =
4318 (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) ? 0 : 0xff;
4319 mgid->raw[1] =
4320 (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) ? 0 : 0x0e;
4321 mgid->raw[2] = 0;
4322 mgid->raw[3] = 0;
4323 mgid->raw[4] = 0;
4324 mgid->raw[5] = 0;
4325 mgid->raw[6] = 0;
4326 mgid->raw[7] = 0;
4327 mgid->raw[8] = 0;
4328 mgid->raw[9] = 0;
4329 mgid->raw[10] = 0xff;
4330 mgid->raw[11] = 0xff;
4331 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
4332 }
4333}
4334
4335static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
4336 struct cma_multicast *mc)
4337{
4338 struct iboe_mcast_work *work;
4339 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
4340 int err = 0;
4341 struct sockaddr *addr = (struct sockaddr *)&mc->addr;
4342 struct net_device *ndev = NULL;
4343 enum ib_gid_type gid_type;
4344 bool send_only;
4345
4346 send_only = mc->join_state == BIT(SENDONLY_FULLMEMBER_JOIN);
4347
4348 if (cma_zero_addr((struct sockaddr *)&mc->addr))
4349 return -EINVAL;
4350
4351 work = kzalloc(sizeof *work, GFP_KERNEL);
4352 if (!work)
4353 return -ENOMEM;
4354
4355 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
4356 if (!mc->multicast.ib) {
4357 err = -ENOMEM;
4358 goto out1;
4359 }
4360
4361 gid_type = id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
4362 rdma_start_port(id_priv->cma_dev->device)];
4363 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid, gid_type);
4364
4365 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
4366 if (id_priv->id.ps == RDMA_PS_UDP)
4367 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
4368
4369 if (dev_addr->bound_dev_if)
4370 ndev = dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
4371 if (!ndev) {
4372 err = -ENODEV;
4373 goto out2;
4374 }
4375 mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
4376 mc->multicast.ib->rec.hop_limit = 1;
4377 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
4378
4379 if (addr->sa_family == AF_INET) {
4380 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) {
4381 mc->multicast.ib->rec.hop_limit = IPV6_DEFAULT_HOPLIMIT;
4382 if (!send_only) {
4383 err = cma_igmp_send(ndev, &mc->multicast.ib->rec.mgid,
4384 true);
4385 }
4386 }
4387 } else {
4388 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP)
4389 err = -ENOTSUPP;
4390 }
4391 dev_put(ndev);
4392 if (err || !mc->multicast.ib->rec.mtu) {
4393 if (!err)
4394 err = -EINVAL;
4395 goto out2;
4396 }
4397 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
4398 &mc->multicast.ib->rec.port_gid);
4399 work->id = id_priv;
4400 work->mc = mc;
4401 INIT_WORK(&work->work, iboe_mcast_work_handler);
4402 kref_get(&mc->mcref);
4403 queue_work(cma_wq, &work->work);
4404
4405 return 0;
4406
4407out2:
4408 kfree(mc->multicast.ib);
4409out1:
4410 kfree(work);
4411 return err;
4412}
4413
4414int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
4415 u8 join_state, void *context)
4416{
4417 struct rdma_id_private *id_priv;
4418 struct cma_multicast *mc;
4419 int ret;
4420
4421 if (!id->device)
4422 return -EINVAL;
4423
4424 id_priv = container_of(id, struct rdma_id_private, id);
4425 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
4426 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
4427 return -EINVAL;
4428
4429 mc = kmalloc(sizeof *mc, GFP_KERNEL);
4430 if (!mc)
4431 return -ENOMEM;
4432
4433 memcpy(&mc->addr, addr, rdma_addr_size(addr));
4434 mc->context = context;
4435 mc->id_priv = id_priv;
4436 mc->join_state = join_state;
4437
4438 if (rdma_protocol_roce(id->device, id->port_num)) {
4439 kref_init(&mc->mcref);
4440 ret = cma_iboe_join_multicast(id_priv, mc);
4441 if (ret)
4442 goto out_err;
4443 } else if (rdma_cap_ib_mcast(id->device, id->port_num)) {
4444 ret = cma_join_ib_multicast(id_priv, mc);
4445 if (ret)
4446 goto out_err;
4447 } else {
4448 ret = -ENOSYS;
4449 goto out_err;
4450 }
4451
4452 spin_lock(&id_priv->lock);
4453 list_add(&mc->list, &id_priv->mc_list);
4454 spin_unlock(&id_priv->lock);
4455
4456 return 0;
4457out_err:
4458 kfree(mc);
4459 return ret;
4460}
4461EXPORT_SYMBOL(rdma_join_multicast);
4462
4463void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
4464{
4465 struct rdma_id_private *id_priv;
4466 struct cma_multicast *mc;
4467
4468 id_priv = container_of(id, struct rdma_id_private, id);
4469 spin_lock_irq(&id_priv->lock);
4470 list_for_each_entry(mc, &id_priv->mc_list, list) {
4471 if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) {
4472 list_del(&mc->list);
4473 spin_unlock_irq(&id_priv->lock);
4474
4475 if (id->qp)
4476 ib_detach_mcast(id->qp,
4477 &mc->multicast.ib->rec.mgid,
4478 be16_to_cpu(mc->multicast.ib->rec.mlid));
4479
4480 BUG_ON(id_priv->cma_dev->device != id->device);
4481
4482 if (rdma_cap_ib_mcast(id->device, id->port_num)) {
4483 ib_sa_free_multicast(mc->multicast.ib);
4484 kfree(mc);
4485 } else if (rdma_protocol_roce(id->device, id->port_num)) {
4486 cma_leave_roce_mc_group(id_priv, mc);
4487 }
4488 return;
4489 }
4490 }
4491 spin_unlock_irq(&id_priv->lock);
4492}
4493EXPORT_SYMBOL(rdma_leave_multicast);
4494
4495static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
4496{
4497 struct rdma_dev_addr *dev_addr;
4498 struct cma_ndev_work *work;
4499
4500 dev_addr = &id_priv->id.route.addr.dev_addr;
4501
4502 if ((dev_addr->bound_dev_if == ndev->ifindex) &&
4503 (net_eq(dev_net(ndev), dev_addr->net)) &&
4504 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
4505 pr_info("RDMA CM addr change for ndev %s used by id %p\n",
4506 ndev->name, &id_priv->id);
4507 work = kzalloc(sizeof *work, GFP_KERNEL);
4508 if (!work)
4509 return -ENOMEM;
4510
4511 INIT_WORK(&work->work, cma_ndev_work_handler);
4512 work->id = id_priv;
4513 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
4514 atomic_inc(&id_priv->refcount);
4515 queue_work(cma_wq, &work->work);
4516 }
4517
4518 return 0;
4519}
4520
4521static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
4522 void *ptr)
4523{
4524 struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
4525 struct cma_device *cma_dev;
4526 struct rdma_id_private *id_priv;
4527 int ret = NOTIFY_DONE;
4528
4529 if (event != NETDEV_BONDING_FAILOVER)
4530 return NOTIFY_DONE;
4531
4532 if (!netif_is_bond_master(ndev))
4533 return NOTIFY_DONE;
4534
4535 mutex_lock(&lock);
4536 list_for_each_entry(cma_dev, &dev_list, list)
4537 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
4538 ret = cma_netdev_change(ndev, id_priv);
4539 if (ret)
4540 goto out;
4541 }
4542
4543out:
4544 mutex_unlock(&lock);
4545 return ret;
4546}
4547
4548static struct notifier_block cma_nb = {
4549 .notifier_call = cma_netdev_callback
4550};
4551
4552static void cma_add_one(struct ib_device *device)
4553{
4554 struct cma_device *cma_dev;
4555 struct rdma_id_private *id_priv;
4556 unsigned int i;
4557 unsigned long supported_gids = 0;
4558
4559 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
4560 if (!cma_dev)
4561 return;
4562
4563 cma_dev->device = device;
4564 cma_dev->default_gid_type = kcalloc(device->phys_port_cnt,
4565 sizeof(*cma_dev->default_gid_type),
4566 GFP_KERNEL);
4567 if (!cma_dev->default_gid_type)
4568 goto free_cma_dev;
4569
4570 cma_dev->default_roce_tos = kcalloc(device->phys_port_cnt,
4571 sizeof(*cma_dev->default_roce_tos),
4572 GFP_KERNEL);
4573 if (!cma_dev->default_roce_tos)
4574 goto free_gid_type;
4575
4576 rdma_for_each_port (device, i) {
4577 supported_gids = roce_gid_type_mask_support(device, i);
4578 WARN_ON(!supported_gids);
4579 if (supported_gids & (1 << CMA_PREFERRED_ROCE_GID_TYPE))
4580 cma_dev->default_gid_type[i - rdma_start_port(device)] =
4581 CMA_PREFERRED_ROCE_GID_TYPE;
4582 else
4583 cma_dev->default_gid_type[i - rdma_start_port(device)] =
4584 find_first_bit(&supported_gids, BITS_PER_LONG);
4585 cma_dev->default_roce_tos[i - rdma_start_port(device)] = 0;
4586 }
4587
4588 init_completion(&cma_dev->comp);
4589 atomic_set(&cma_dev->refcount, 1);
4590 INIT_LIST_HEAD(&cma_dev->id_list);
4591 ib_set_client_data(device, &cma_client, cma_dev);
4592
4593 mutex_lock(&lock);
4594 list_add_tail(&cma_dev->list, &dev_list);
4595 list_for_each_entry(id_priv, &listen_any_list, list)
4596 cma_listen_on_dev(id_priv, cma_dev);
4597 mutex_unlock(&lock);
4598
4599 return;
4600
4601free_gid_type:
4602 kfree(cma_dev->default_gid_type);
4603
4604free_cma_dev:
4605 kfree(cma_dev);
4606
4607 return;
4608}
4609
4610static int cma_remove_id_dev(struct rdma_id_private *id_priv)
4611{
4612 struct rdma_cm_event event = {};
4613 enum rdma_cm_state state;
4614 int ret = 0;
4615
4616 /* Record that we want to remove the device */
4617 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
4618 if (state == RDMA_CM_DESTROYING)
4619 return 0;
4620
4621 cma_cancel_operation(id_priv, state);
4622 mutex_lock(&id_priv->handler_mutex);
4623
4624 /* Check for destruction from another callback. */
4625 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
4626 goto out;
4627
4628 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
4629 ret = id_priv->id.event_handler(&id_priv->id, &event);
4630out:
4631 mutex_unlock(&id_priv->handler_mutex);
4632 return ret;
4633}
4634
4635static void cma_process_remove(struct cma_device *cma_dev)
4636{
4637 struct rdma_id_private *id_priv;
4638 int ret;
4639
4640 mutex_lock(&lock);
4641 while (!list_empty(&cma_dev->id_list)) {
4642 id_priv = list_entry(cma_dev->id_list.next,
4643 struct rdma_id_private, list);
4644
4645 list_del(&id_priv->listen_list);
4646 list_del_init(&id_priv->list);
4647 atomic_inc(&id_priv->refcount);
4648 mutex_unlock(&lock);
4649
4650 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
4651 cma_deref_id(id_priv);
4652 if (ret)
4653 rdma_destroy_id(&id_priv->id);
4654
4655 mutex_lock(&lock);
4656 }
4657 mutex_unlock(&lock);
4658
4659 cma_deref_dev(cma_dev);
4660 wait_for_completion(&cma_dev->comp);
4661}
4662
4663static void cma_remove_one(struct ib_device *device, void *client_data)
4664{
4665 struct cma_device *cma_dev = client_data;
4666
4667 if (!cma_dev)
4668 return;
4669
4670 mutex_lock(&lock);
4671 list_del(&cma_dev->list);
4672 mutex_unlock(&lock);
4673
4674 cma_process_remove(cma_dev);
4675 kfree(cma_dev->default_roce_tos);
4676 kfree(cma_dev->default_gid_type);
4677 kfree(cma_dev);
4678}
4679
4680static int cma_init_net(struct net *net)
4681{
4682 struct cma_pernet *pernet = cma_pernet(net);
4683
4684 xa_init(&pernet->tcp_ps);
4685 xa_init(&pernet->udp_ps);
4686 xa_init(&pernet->ipoib_ps);
4687 xa_init(&pernet->ib_ps);
4688
4689 return 0;
4690}
4691
4692static void cma_exit_net(struct net *net)
4693{
4694 struct cma_pernet *pernet = cma_pernet(net);
4695
4696 WARN_ON(!xa_empty(&pernet->tcp_ps));
4697 WARN_ON(!xa_empty(&pernet->udp_ps));
4698 WARN_ON(!xa_empty(&pernet->ipoib_ps));
4699 WARN_ON(!xa_empty(&pernet->ib_ps));
4700}
4701
4702static struct pernet_operations cma_pernet_operations = {
4703 .init = cma_init_net,
4704 .exit = cma_exit_net,
4705 .id = &cma_pernet_id,
4706 .size = sizeof(struct cma_pernet),
4707};
4708
4709static int __init cma_init(void)
4710{
4711 int ret;
4712
4713 cma_wq = alloc_ordered_workqueue("rdma_cm", WQ_MEM_RECLAIM);
4714 if (!cma_wq)
4715 return -ENOMEM;
4716
4717 ret = register_pernet_subsys(&cma_pernet_operations);
4718 if (ret)
4719 goto err_wq;
4720
4721 ib_sa_register_client(&sa_client);
4722 register_netdevice_notifier(&cma_nb);
4723
4724 ret = ib_register_client(&cma_client);
4725 if (ret)
4726 goto err;
4727
4728 ret = cma_configfs_init();
4729 if (ret)
4730 goto err_ib;
4731
4732 return 0;
4733
4734err_ib:
4735 ib_unregister_client(&cma_client);
4736err:
4737 unregister_netdevice_notifier(&cma_nb);
4738 ib_sa_unregister_client(&sa_client);
4739err_wq:
4740 destroy_workqueue(cma_wq);
4741 return ret;
4742}
4743
4744static void __exit cma_cleanup(void)
4745{
4746 cma_configfs_exit();
4747 ib_unregister_client(&cma_client);
4748 unregister_netdevice_notifier(&cma_nb);
4749 ib_sa_unregister_client(&sa_client);
4750 unregister_pernet_subsys(&cma_pernet_operations);
4751 destroy_workqueue(cma_wq);
4752}
4753
4754module_init(cma_init);
4755module_exit(cma_cleanup);