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locking/refcounts: Include fewer headers in <linux/refcount.h>
[linux/fpc-iii.git] / drivers / infiniband / core / cma.c
blobbff10ab141b04fe418cb2f289eb2b12f754fc0ce
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/idr.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
67 MODULE_AUTHOR("Sean Hefty");
68 MODULE_DESCRIPTION("Generic RDMA CM Agent");
69 MODULE_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
78 static 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
97 const 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 }
104 EXPORT_SYMBOL(rdma_event_msg);
105
106 const 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 }
118 EXPORT_SYMBOL(rdma_reject_msg);
119
120 bool 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 }
131 EXPORT_SYMBOL(rdma_is_consumer_reject);
132
133 const 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 }
147 EXPORT_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 */
153 struct 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 }
162 EXPORT_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 */
168 struct 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 }
175 EXPORT_SYMBOL(rdma_res_to_id);
176
177 static void cma_add_one(struct ib_device *device);
178 static void cma_remove_one(struct ib_device *device, void *client_data);
179
180 static struct ib_client cma_client = {
181 .name = "cma",
182 .add = cma_add_one,
183 .remove = cma_remove_one
184 };
185
186 static struct ib_sa_client sa_client;
187 static LIST_HEAD(dev_list);
188 static LIST_HEAD(listen_any_list);
189 static DEFINE_MUTEX(lock);
190 static struct workqueue_struct *cma_wq;
191 static unsigned int cma_pernet_id;
192
193 struct cma_pernet {
194 struct idr tcp_ps;
195 struct idr udp_ps;
196 struct idr ipoib_ps;
197 struct idr ib_ps;
198 };
199
200 static struct cma_pernet *cma_pernet(struct net *net)
201 {
202 return net_generic(net, cma_pernet_id);
203 }
204
205 static struct idr *cma_pernet_idr(struct net *net, enum rdma_ucm_port_space ps)
206 {
207 struct cma_pernet *pernet = cma_pernet(net);
208
209 switch (ps) {
210 case RDMA_PS_TCP:
211 return &pernet->tcp_ps;
212 case RDMA_PS_UDP:
213 return &pernet->udp_ps;
214 case RDMA_PS_IPOIB:
215 return &pernet->ipoib_ps;
216 case RDMA_PS_IB:
217 return &pernet->ib_ps;
218 default:
219 return NULL;
220 }
221 }
222
223 struct cma_device {
224 struct list_head list;
225 struct ib_device *device;
226 struct completion comp;
227 atomic_t refcount;
228 struct list_head id_list;
229 enum ib_gid_type *default_gid_type;
230 u8 *default_roce_tos;
231 };
232
233 struct rdma_bind_list {
234 enum rdma_ucm_port_space ps;
235 struct hlist_head owners;
236 unsigned short port;
237 };
238
239 struct class_port_info_context {
240 struct ib_class_port_info *class_port_info;
241 struct ib_device *device;
242 struct completion done;
243 struct ib_sa_query *sa_query;
244 u8 port_num;
245 };
246
247 static int cma_ps_alloc(struct net *net, enum rdma_ucm_port_space ps,
248 struct rdma_bind_list *bind_list, int snum)
249 {
250 struct idr *idr = cma_pernet_idr(net, ps);
251
252 return idr_alloc(idr, bind_list, snum, snum + 1, GFP_KERNEL);
253 }
254
255 static struct rdma_bind_list *cma_ps_find(struct net *net,
256 enum rdma_ucm_port_space ps, int snum)
257 {
258 struct idr *idr = cma_pernet_idr(net, ps);
259
260 return idr_find(idr, snum);
261 }
262
263 static void cma_ps_remove(struct net *net, enum rdma_ucm_port_space ps,
264 int snum)
265 {
266 struct idr *idr = cma_pernet_idr(net, ps);
267
268 idr_remove(idr, snum);
269 }
270
271 enum {
272 CMA_OPTION_AFONLY,
273 };
274
275 void cma_ref_dev(struct cma_device *cma_dev)
276 {
277 atomic_inc(&cma_dev->refcount);
278 }
279
280 struct cma_device *cma_enum_devices_by_ibdev(cma_device_filter filter,
281 void *cookie)
282 {
283 struct cma_device *cma_dev;
284 struct cma_device *found_cma_dev = NULL;
285
286 mutex_lock(&lock);
287
288 list_for_each_entry(cma_dev, &dev_list, list)
289 if (filter(cma_dev->device, cookie)) {
290 found_cma_dev = cma_dev;
291 break;
292 }
293
294 if (found_cma_dev)
295 cma_ref_dev(found_cma_dev);
296 mutex_unlock(&lock);
297 return found_cma_dev;
298 }
299
300 int cma_get_default_gid_type(struct cma_device *cma_dev,
301 unsigned int port)
302 {
303 if (!rdma_is_port_valid(cma_dev->device, port))
304 return -EINVAL;
305
306 return cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)];
307 }
308
309 int cma_set_default_gid_type(struct cma_device *cma_dev,
310 unsigned int port,
311 enum ib_gid_type default_gid_type)
312 {
313 unsigned long supported_gids;
314
315 if (!rdma_is_port_valid(cma_dev->device, port))
316 return -EINVAL;
317
318 supported_gids = roce_gid_type_mask_support(cma_dev->device, port);
319
320 if (!(supported_gids & 1 << default_gid_type))
321 return -EINVAL;
322
323 cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)] =
324 default_gid_type;
325
326 return 0;
327 }
328
329 int cma_get_default_roce_tos(struct cma_device *cma_dev, unsigned int port)
330 {
331 if (!rdma_is_port_valid(cma_dev->device, port))
332 return -EINVAL;
333
334 return cma_dev->default_roce_tos[port - rdma_start_port(cma_dev->device)];
335 }
336
337 int cma_set_default_roce_tos(struct cma_device *cma_dev, unsigned int port,
338 u8 default_roce_tos)
339 {
340 if (!rdma_is_port_valid(cma_dev->device, port))
341 return -EINVAL;
342
343 cma_dev->default_roce_tos[port - rdma_start_port(cma_dev->device)] =
344 default_roce_tos;
345
346 return 0;
347 }
348 struct ib_device *cma_get_ib_dev(struct cma_device *cma_dev)
349 {
350 return cma_dev->device;
351 }
352
353 /*
354 * Device removal can occur at anytime, so we need extra handling to
355 * serialize notifying the user of device removal with other callbacks.
356 * We do this by disabling removal notification while a callback is in process,
357 * and reporting it after the callback completes.
358 */
359
360 struct cma_multicast {
361 struct rdma_id_private *id_priv;
362 union {
363 struct ib_sa_multicast *ib;
364 } multicast;
365 struct list_head list;
366 void *context;
367 struct sockaddr_storage addr;
368 struct kref mcref;
369 bool igmp_joined;
370 u8 join_state;
371 };
372
373 struct 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
381 struct cma_ndev_work {
382 struct work_struct work;
383 struct rdma_id_private *id;
384 struct rdma_cm_event event;
385 };
386
387 struct iboe_mcast_work {
388 struct work_struct work;
389 struct rdma_id_private *id;
390 struct cma_multicast *mc;
391 };
392
393 union cma_ip_addr {
394 struct in6_addr ip6;
395 struct {
396 __be32 pad[3];
397 __be32 addr;
398 } ip4;
399 };
400
401 struct 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
411 struct cma_req_info {
412 struct sockaddr_storage listen_addr_storage;
413 struct sockaddr_storage src_addr_storage;
414 struct ib_device *device;
415 int port;
416 union ib_gid local_gid;
417 __be64 service_id;
418 u16 pkey;
419 bool has_gid:1;
420 };
421
422 static 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
433 static 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
446 static 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
459 static inline u8 cma_get_ip_ver(const struct cma_hdr *hdr)
460 {
461 return hdr->ip_version >> 4;
462 }
463
464 static 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
469 static 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
489 static 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->gid_type = 0;
495 id_priv->id.device = cma_dev->device;
496 id_priv->id.route.addr.dev_addr.transport =
497 rdma_node_get_transport(cma_dev->device->node_type);
498 list_add_tail(&id_priv->list, &cma_dev->id_list);
499 id_priv->res.type = RDMA_RESTRACK_CM_ID;
500 rdma_restrack_add(&id_priv->res);
501 }
502
503 static void cma_attach_to_dev(struct rdma_id_private *id_priv,
504 struct cma_device *cma_dev)
505 {
506 _cma_attach_to_dev(id_priv, cma_dev);
507 id_priv->gid_type =
508 cma_dev->default_gid_type[id_priv->id.port_num -
509 rdma_start_port(cma_dev->device)];
510 }
511
512 void cma_deref_dev(struct cma_device *cma_dev)
513 {
514 if (atomic_dec_and_test(&cma_dev->refcount))
515 complete(&cma_dev->comp);
516 }
517
518 static inline void release_mc(struct kref *kref)
519 {
520 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
521
522 kfree(mc->multicast.ib);
523 kfree(mc);
524 }
525
526 static void cma_release_dev(struct rdma_id_private *id_priv)
527 {
528 mutex_lock(&lock);
529 list_del(&id_priv->list);
530 cma_deref_dev(id_priv->cma_dev);
531 id_priv->cma_dev = NULL;
532 mutex_unlock(&lock);
533 }
534
535 static inline struct sockaddr *cma_src_addr(struct rdma_id_private *id_priv)
536 {
537 return (struct sockaddr *) &id_priv->id.route.addr.src_addr;
538 }
539
540 static inline struct sockaddr *cma_dst_addr(struct rdma_id_private *id_priv)
541 {
542 return (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
543 }
544
545 static inline unsigned short cma_family(struct rdma_id_private *id_priv)
546 {
547 return id_priv->id.route.addr.src_addr.ss_family;
548 }
549
550 static int cma_set_qkey(struct rdma_id_private *id_priv, u32 qkey)
551 {
552 struct ib_sa_mcmember_rec rec;
553 int ret = 0;
554
555 if (id_priv->qkey) {
556 if (qkey && id_priv->qkey != qkey)
557 return -EINVAL;
558 return 0;
559 }
560
561 if (qkey) {
562 id_priv->qkey = qkey;
563 return 0;
564 }
565
566 switch (id_priv->id.ps) {
567 case RDMA_PS_UDP:
568 case RDMA_PS_IB:
569 id_priv->qkey = RDMA_UDP_QKEY;
570 break;
571 case RDMA_PS_IPOIB:
572 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
573 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
574 id_priv->id.port_num, &rec.mgid,
575 &rec);
576 if (!ret)
577 id_priv->qkey = be32_to_cpu(rec.qkey);
578 break;
579 default:
580 break;
581 }
582 return ret;
583 }
584
585 static void cma_translate_ib(struct sockaddr_ib *sib, struct rdma_dev_addr *dev_addr)
586 {
587 dev_addr->dev_type = ARPHRD_INFINIBAND;
588 rdma_addr_set_sgid(dev_addr, (union ib_gid *) &sib->sib_addr);
589 ib_addr_set_pkey(dev_addr, ntohs(sib->sib_pkey));
590 }
591
592 static int cma_translate_addr(struct sockaddr *addr, struct rdma_dev_addr *dev_addr)
593 {
594 int ret;
595
596 if (addr->sa_family != AF_IB) {
597 ret = rdma_translate_ip(addr, dev_addr);
598 } else {
599 cma_translate_ib((struct sockaddr_ib *) addr, dev_addr);
600 ret = 0;
601 }
602
603 return ret;
604 }
605
606 static inline int cma_validate_port(struct ib_device *device, u8 port,
607 enum ib_gid_type gid_type,
608 union ib_gid *gid,
609 struct rdma_id_private *id_priv)
610 {
611 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
612 int bound_if_index = dev_addr->bound_dev_if;
613 int dev_type = dev_addr->dev_type;
614 struct net_device *ndev = NULL;
615 int ret = -ENODEV;
616
617 if ((dev_type == ARPHRD_INFINIBAND) && !rdma_protocol_ib(device, port))
618 return ret;
619
620 if ((dev_type != ARPHRD_INFINIBAND) && rdma_protocol_ib(device, port))
621 return ret;
622
623 if (dev_type == ARPHRD_ETHER && rdma_protocol_roce(device, port)) {
624 ndev = dev_get_by_index(dev_addr->net, bound_if_index);
625 if (!ndev)
626 return ret;
627 } else {
628 gid_type = IB_GID_TYPE_IB;
629 }
630
631 ret = ib_find_cached_gid_by_port(device, gid, gid_type, port,
632 ndev, NULL);
633
634 if (ndev)
635 dev_put(ndev);
636
637 return ret;
638 }
639
640 static int cma_acquire_dev(struct rdma_id_private *id_priv,
641 struct rdma_id_private *listen_id_priv)
642 {
643 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
644 struct cma_device *cma_dev;
645 union ib_gid gid, iboe_gid, *gidp;
646 int ret = -ENODEV;
647 u8 port;
648
649 if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
650 id_priv->id.ps == RDMA_PS_IPOIB)
651 return -EINVAL;
652
653 mutex_lock(&lock);
654 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
655 &iboe_gid);
656
657 memcpy(&gid, dev_addr->src_dev_addr +
658 rdma_addr_gid_offset(dev_addr), sizeof gid);
659
660 if (listen_id_priv) {
661 cma_dev = listen_id_priv->cma_dev;
662 port = listen_id_priv->id.port_num;
663 gidp = rdma_protocol_roce(cma_dev->device, port) ?
664 &iboe_gid : &gid;
665
666 ret = cma_validate_port(cma_dev->device, port,
667 rdma_protocol_ib(cma_dev->device, port) ?
668 IB_GID_TYPE_IB :
669 listen_id_priv->gid_type, gidp,
670 id_priv);
671 if (!ret) {
672 id_priv->id.port_num = port;
673 goto out;
674 }
675 }
676
677 list_for_each_entry(cma_dev, &dev_list, list) {
678 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
679 if (listen_id_priv &&
680 listen_id_priv->cma_dev == cma_dev &&
681 listen_id_priv->id.port_num == port)
682 continue;
683
684 gidp = rdma_protocol_roce(cma_dev->device, port) ?
685 &iboe_gid : &gid;
686
687 ret = cma_validate_port(cma_dev->device, port,
688 rdma_protocol_ib(cma_dev->device, port) ?
689 IB_GID_TYPE_IB :
690 cma_dev->default_gid_type[port - 1],
691 gidp, id_priv);
692 if (!ret) {
693 id_priv->id.port_num = port;
694 goto out;
695 }
696 }
697 }
698
699 out:
700 if (!ret)
701 cma_attach_to_dev(id_priv, cma_dev);
702
703 mutex_unlock(&lock);
704 return ret;
705 }
706
707 /*
708 * Select the source IB device and address to reach the destination IB address.
709 */
710 static int cma_resolve_ib_dev(struct rdma_id_private *id_priv)
711 {
712 struct cma_device *cma_dev, *cur_dev;
713 struct sockaddr_ib *addr;
714 union ib_gid gid, sgid, *dgid;
715 u16 pkey, index;
716 u8 p;
717 enum ib_port_state port_state;
718 int i;
719
720 cma_dev = NULL;
721 addr = (struct sockaddr_ib *) cma_dst_addr(id_priv);
722 dgid = (union ib_gid *) &addr->sib_addr;
723 pkey = ntohs(addr->sib_pkey);
724
725 list_for_each_entry(cur_dev, &dev_list, list) {
726 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
727 if (!rdma_cap_af_ib(cur_dev->device, p))
728 continue;
729
730 if (ib_find_cached_pkey(cur_dev->device, p, pkey, &index))
731 continue;
732
733 if (ib_get_cached_port_state(cur_dev->device, p, &port_state))
734 continue;
735 for (i = 0; !ib_get_cached_gid(cur_dev->device, p, i,
736 &gid, NULL);
737 i++) {
738 if (!memcmp(&gid, dgid, sizeof(gid))) {
739 cma_dev = cur_dev;
740 sgid = gid;
741 id_priv->id.port_num = p;
742 goto found;
743 }
744
745 if (!cma_dev && (gid.global.subnet_prefix ==
746 dgid->global.subnet_prefix) &&
747 port_state == IB_PORT_ACTIVE) {
748 cma_dev = cur_dev;
749 sgid = gid;
750 id_priv->id.port_num = p;
751 }
752 }
753 }
754 }
755
756 if (!cma_dev)
757 return -ENODEV;
758
759 found:
760 cma_attach_to_dev(id_priv, cma_dev);
761 addr = (struct sockaddr_ib *) cma_src_addr(id_priv);
762 memcpy(&addr->sib_addr, &sgid, sizeof sgid);
763 cma_translate_ib(addr, &id_priv->id.route.addr.dev_addr);
764 return 0;
765 }
766
767 static void cma_deref_id(struct rdma_id_private *id_priv)
768 {
769 if (atomic_dec_and_test(&id_priv->refcount))
770 complete(&id_priv->comp);
771 }
772
773 struct rdma_cm_id *__rdma_create_id(struct net *net,
774 rdma_cm_event_handler event_handler,
775 void *context, enum rdma_ucm_port_space ps,
776 enum ib_qp_type qp_type, const char *caller)
777 {
778 struct rdma_id_private *id_priv;
779
780 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
781 if (!id_priv)
782 return ERR_PTR(-ENOMEM);
783
784 if (caller)
785 id_priv->res.kern_name = caller;
786 else
787 rdma_restrack_set_task(&id_priv->res, current);
788 id_priv->state = RDMA_CM_IDLE;
789 id_priv->id.context = context;
790 id_priv->id.event_handler = event_handler;
791 id_priv->id.ps = ps;
792 id_priv->id.qp_type = qp_type;
793 id_priv->tos_set = false;
794 spin_lock_init(&id_priv->lock);
795 mutex_init(&id_priv->qp_mutex);
796 init_completion(&id_priv->comp);
797 atomic_set(&id_priv->refcount, 1);
798 mutex_init(&id_priv->handler_mutex);
799 INIT_LIST_HEAD(&id_priv->listen_list);
800 INIT_LIST_HEAD(&id_priv->mc_list);
801 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
802 id_priv->id.route.addr.dev_addr.net = get_net(net);
803 id_priv->seq_num &= 0x00ffffff;
804
805 return &id_priv->id;
806 }
807 EXPORT_SYMBOL(__rdma_create_id);
808
809 static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
810 {
811 struct ib_qp_attr qp_attr;
812 int qp_attr_mask, ret;
813
814 qp_attr.qp_state = IB_QPS_INIT;
815 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
816 if (ret)
817 return ret;
818
819 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
820 if (ret)
821 return ret;
822
823 qp_attr.qp_state = IB_QPS_RTR;
824 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
825 if (ret)
826 return ret;
827
828 qp_attr.qp_state = IB_QPS_RTS;
829 qp_attr.sq_psn = 0;
830 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
831
832 return ret;
833 }
834
835 static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
836 {
837 struct ib_qp_attr qp_attr;
838 int qp_attr_mask, ret;
839
840 qp_attr.qp_state = IB_QPS_INIT;
841 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
842 if (ret)
843 return ret;
844
845 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
846 }
847
848 int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
849 struct ib_qp_init_attr *qp_init_attr)
850 {
851 struct rdma_id_private *id_priv;
852 struct ib_qp *qp;
853 int ret;
854
855 id_priv = container_of(id, struct rdma_id_private, id);
856 if (id->device != pd->device)
857 return -EINVAL;
858
859 qp_init_attr->port_num = id->port_num;
860 qp = ib_create_qp(pd, qp_init_attr);
861 if (IS_ERR(qp))
862 return PTR_ERR(qp);
863
864 if (id->qp_type == IB_QPT_UD)
865 ret = cma_init_ud_qp(id_priv, qp);
866 else
867 ret = cma_init_conn_qp(id_priv, qp);
868 if (ret)
869 goto err;
870
871 id->qp = qp;
872 id_priv->qp_num = qp->qp_num;
873 id_priv->srq = (qp->srq != NULL);
874 return 0;
875 err:
876 ib_destroy_qp(qp);
877 return ret;
878 }
879 EXPORT_SYMBOL(rdma_create_qp);
880
881 void rdma_destroy_qp(struct rdma_cm_id *id)
882 {
883 struct rdma_id_private *id_priv;
884
885 id_priv = container_of(id, struct rdma_id_private, id);
886 mutex_lock(&id_priv->qp_mutex);
887 ib_destroy_qp(id_priv->id.qp);
888 id_priv->id.qp = NULL;
889 mutex_unlock(&id_priv->qp_mutex);
890 }
891 EXPORT_SYMBOL(rdma_destroy_qp);
892
893 static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
894 struct rdma_conn_param *conn_param)
895 {
896 struct ib_qp_attr qp_attr;
897 int qp_attr_mask, ret;
898
899 mutex_lock(&id_priv->qp_mutex);
900 if (!id_priv->id.qp) {
901 ret = 0;
902 goto out;
903 }
904
905 /* Need to update QP attributes from default values. */
906 qp_attr.qp_state = IB_QPS_INIT;
907 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
908 if (ret)
909 goto out;
910
911 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
912 if (ret)
913 goto out;
914
915 qp_attr.qp_state = IB_QPS_RTR;
916 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
917 if (ret)
918 goto out;
919
920 BUG_ON(id_priv->cma_dev->device != id_priv->id.device);
921
922 if (conn_param)
923 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
924 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
925 out:
926 mutex_unlock(&id_priv->qp_mutex);
927 return ret;
928 }
929
930 static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
931 struct rdma_conn_param *conn_param)
932 {
933 struct ib_qp_attr qp_attr;
934 int qp_attr_mask, ret;
935
936 mutex_lock(&id_priv->qp_mutex);
937 if (!id_priv->id.qp) {
938 ret = 0;
939 goto out;
940 }
941
942 qp_attr.qp_state = IB_QPS_RTS;
943 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
944 if (ret)
945 goto out;
946
947 if (conn_param)
948 qp_attr.max_rd_atomic = conn_param->initiator_depth;
949 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
950 out:
951 mutex_unlock(&id_priv->qp_mutex);
952 return ret;
953 }
954
955 static int cma_modify_qp_err(struct rdma_id_private *id_priv)
956 {
957 struct ib_qp_attr qp_attr;
958 int ret;
959
960 mutex_lock(&id_priv->qp_mutex);
961 if (!id_priv->id.qp) {
962 ret = 0;
963 goto out;
964 }
965
966 qp_attr.qp_state = IB_QPS_ERR;
967 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
968 out:
969 mutex_unlock(&id_priv->qp_mutex);
970 return ret;
971 }
972
973 static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
974 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
975 {
976 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
977 int ret;
978 u16 pkey;
979
980 if (rdma_cap_eth_ah(id_priv->id.device, id_priv->id.port_num))
981 pkey = 0xffff;
982 else
983 pkey = ib_addr_get_pkey(dev_addr);
984
985 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
986 pkey, &qp_attr->pkey_index);
987 if (ret)
988 return ret;
989
990 qp_attr->port_num = id_priv->id.port_num;
991 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
992
993 if (id_priv->id.qp_type == IB_QPT_UD) {
994 ret = cma_set_qkey(id_priv, 0);
995 if (ret)
996 return ret;
997
998 qp_attr->qkey = id_priv->qkey;
999 *qp_attr_mask |= IB_QP_QKEY;
1000 } else {
1001 qp_attr->qp_access_flags = 0;
1002 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
1003 }
1004 return 0;
1005 }
1006
1007 int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
1008 int *qp_attr_mask)
1009 {
1010 struct rdma_id_private *id_priv;
1011 int ret = 0;
1012
1013 id_priv = container_of(id, struct rdma_id_private, id);
1014 if (rdma_cap_ib_cm(id->device, id->port_num)) {
1015 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
1016 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
1017 else
1018 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
1019 qp_attr_mask);
1020
1021 if (qp_attr->qp_state == IB_QPS_RTR)
1022 qp_attr->rq_psn = id_priv->seq_num;
1023 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
1024 if (!id_priv->cm_id.iw) {
1025 qp_attr->qp_access_flags = 0;
1026 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
1027 } else
1028 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
1029 qp_attr_mask);
1030 qp_attr->port_num = id_priv->id.port_num;
1031 *qp_attr_mask |= IB_QP_PORT;
1032 } else
1033 ret = -ENOSYS;
1034
1035 return ret;
1036 }
1037 EXPORT_SYMBOL(rdma_init_qp_attr);
1038
1039 static inline int cma_zero_addr(struct sockaddr *addr)
1040 {
1041 switch (addr->sa_family) {
1042 case AF_INET:
1043 return ipv4_is_zeronet(((struct sockaddr_in *)addr)->sin_addr.s_addr);
1044 case AF_INET6:
1045 return ipv6_addr_any(&((struct sockaddr_in6 *) addr)->sin6_addr);
1046 case AF_IB:
1047 return ib_addr_any(&((struct sockaddr_ib *) addr)->sib_addr);
1048 default:
1049 return 0;
1050 }
1051 }
1052
1053 static inline int cma_loopback_addr(struct sockaddr *addr)
1054 {
1055 switch (addr->sa_family) {
1056 case AF_INET:
1057 return ipv4_is_loopback(((struct sockaddr_in *) addr)->sin_addr.s_addr);
1058 case AF_INET6:
1059 return ipv6_addr_loopback(&((struct sockaddr_in6 *) addr)->sin6_addr);
1060 case AF_IB:
1061 return ib_addr_loopback(&((struct sockaddr_ib *) addr)->sib_addr);
1062 default:
1063 return 0;
1064 }
1065 }
1066
1067 static inline int cma_any_addr(struct sockaddr *addr)
1068 {
1069 return cma_zero_addr(addr) || cma_loopback_addr(addr);
1070 }
1071
1072 static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
1073 {
1074 if (src->sa_family != dst->sa_family)
1075 return -1;
1076
1077 switch (src->sa_family) {
1078 case AF_INET:
1079 return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
1080 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
1081 case AF_INET6:
1082 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
1083 &((struct sockaddr_in6 *) dst)->sin6_addr);
1084 default:
1085 return ib_addr_cmp(&((struct sockaddr_ib *) src)->sib_addr,
1086 &((struct sockaddr_ib *) dst)->sib_addr);
1087 }
1088 }
1089
1090 static __be16 cma_port(struct sockaddr *addr)
1091 {
1092 struct sockaddr_ib *sib;
1093
1094 switch (addr->sa_family) {
1095 case AF_INET:
1096 return ((struct sockaddr_in *) addr)->sin_port;
1097 case AF_INET6:
1098 return ((struct sockaddr_in6 *) addr)->sin6_port;
1099 case AF_IB:
1100 sib = (struct sockaddr_ib *) addr;
1101 return htons((u16) (be64_to_cpu(sib->sib_sid) &
1102 be64_to_cpu(sib->sib_sid_mask)));
1103 default:
1104 return 0;
1105 }
1106 }
1107
1108 static inline int cma_any_port(struct sockaddr *addr)
1109 {
1110 return !cma_port(addr);
1111 }
1112
1113 static void cma_save_ib_info(struct sockaddr *src_addr,
1114 struct sockaddr *dst_addr,
1115 struct rdma_cm_id *listen_id,
1116 struct sa_path_rec *path)
1117 {
1118 struct sockaddr_ib *listen_ib, *ib;
1119
1120 listen_ib = (struct sockaddr_ib *) &listen_id->route.addr.src_addr;
1121 if (src_addr) {
1122 ib = (struct sockaddr_ib *)src_addr;
1123 ib->sib_family = AF_IB;
1124 if (path) {
1125 ib->sib_pkey = path->pkey;
1126 ib->sib_flowinfo = path->flow_label;
1127 memcpy(&ib->sib_addr, &path->sgid, 16);
1128 ib->sib_sid = path->service_id;
1129 ib->sib_scope_id = 0;
1130 } else {
1131 ib->sib_pkey = listen_ib->sib_pkey;
1132 ib->sib_flowinfo = listen_ib->sib_flowinfo;
1133 ib->sib_addr = listen_ib->sib_addr;
1134 ib->sib_sid = listen_ib->sib_sid;
1135 ib->sib_scope_id = listen_ib->sib_scope_id;
1136 }
1137 ib->sib_sid_mask = cpu_to_be64(0xffffffffffffffffULL);
1138 }
1139 if (dst_addr) {
1140 ib = (struct sockaddr_ib *)dst_addr;
1141 ib->sib_family = AF_IB;
1142 if (path) {
1143 ib->sib_pkey = path->pkey;
1144 ib->sib_flowinfo = path->flow_label;
1145 memcpy(&ib->sib_addr, &path->dgid, 16);
1146 }
1147 }
1148 }
1149
1150 static void cma_save_ip4_info(struct sockaddr_in *src_addr,
1151 struct sockaddr_in *dst_addr,
1152 struct cma_hdr *hdr,
1153 __be16 local_port)
1154 {
1155 if (src_addr) {
1156 *src_addr = (struct sockaddr_in) {
1157 .sin_family = AF_INET,
1158 .sin_addr.s_addr = hdr->dst_addr.ip4.addr,
1159 .sin_port = local_port,
1160 };
1161 }
1162
1163 if (dst_addr) {
1164 *dst_addr = (struct sockaddr_in) {
1165 .sin_family = AF_INET,
1166 .sin_addr.s_addr = hdr->src_addr.ip4.addr,
1167 .sin_port = hdr->port,
1168 };
1169 }
1170 }
1171
1172 static void cma_save_ip6_info(struct sockaddr_in6 *src_addr,
1173 struct sockaddr_in6 *dst_addr,
1174 struct cma_hdr *hdr,
1175 __be16 local_port)
1176 {
1177 if (src_addr) {
1178 *src_addr = (struct sockaddr_in6) {
1179 .sin6_family = AF_INET6,
1180 .sin6_addr = hdr->dst_addr.ip6,
1181 .sin6_port = local_port,
1182 };
1183 }
1184
1185 if (dst_addr) {
1186 *dst_addr = (struct sockaddr_in6) {
1187 .sin6_family = AF_INET6,
1188 .sin6_addr = hdr->src_addr.ip6,
1189 .sin6_port = hdr->port,
1190 };
1191 }
1192 }
1193
1194 static u16 cma_port_from_service_id(__be64 service_id)
1195 {
1196 return (u16)be64_to_cpu(service_id);
1197 }
1198
1199 static int cma_save_ip_info(struct sockaddr *src_addr,
1200 struct sockaddr *dst_addr,
1201 struct ib_cm_event *ib_event,
1202 __be64 service_id)
1203 {
1204 struct cma_hdr *hdr;
1205 __be16 port;
1206
1207 hdr = ib_event->private_data;
1208 if (hdr->cma_version != CMA_VERSION)
1209 return -EINVAL;
1210
1211 port = htons(cma_port_from_service_id(service_id));
1212
1213 switch (cma_get_ip_ver(hdr)) {
1214 case 4:
1215 cma_save_ip4_info((struct sockaddr_in *)src_addr,
1216 (struct sockaddr_in *)dst_addr, hdr, port);
1217 break;
1218 case 6:
1219 cma_save_ip6_info((struct sockaddr_in6 *)src_addr,
1220 (struct sockaddr_in6 *)dst_addr, hdr, port);
1221 break;
1222 default:
1223 return -EAFNOSUPPORT;
1224 }
1225
1226 return 0;
1227 }
1228
1229 static int cma_save_net_info(struct sockaddr *src_addr,
1230 struct sockaddr *dst_addr,
1231 struct rdma_cm_id *listen_id,
1232 struct ib_cm_event *ib_event,
1233 sa_family_t sa_family, __be64 service_id)
1234 {
1235 if (sa_family == AF_IB) {
1236 if (ib_event->event == IB_CM_REQ_RECEIVED)
1237 cma_save_ib_info(src_addr, dst_addr, listen_id,
1238 ib_event->param.req_rcvd.primary_path);
1239 else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED)
1240 cma_save_ib_info(src_addr, dst_addr, listen_id, NULL);
1241 return 0;
1242 }
1243
1244 return cma_save_ip_info(src_addr, dst_addr, ib_event, service_id);
1245 }
1246
1247 static int cma_save_req_info(const struct ib_cm_event *ib_event,
1248 struct cma_req_info *req)
1249 {
1250 const struct ib_cm_req_event_param *req_param =
1251 &ib_event->param.req_rcvd;
1252 const struct ib_cm_sidr_req_event_param *sidr_param =
1253 &ib_event->param.sidr_req_rcvd;
1254
1255 switch (ib_event->event) {
1256 case IB_CM_REQ_RECEIVED:
1257 req->device = req_param->listen_id->device;
1258 req->port = req_param->port;
1259 memcpy(&req->local_gid, &req_param->primary_path->sgid,
1260 sizeof(req->local_gid));
1261 req->has_gid = true;
1262 req->service_id = req_param->primary_path->service_id;
1263 req->pkey = be16_to_cpu(req_param->primary_path->pkey);
1264 if (req->pkey != req_param->bth_pkey)
1265 pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and primary path P_Key (0x%x)\n"
1266 "RDMA CMA: in the future this may cause the request to be dropped\n",
1267 req_param->bth_pkey, req->pkey);
1268 break;
1269 case IB_CM_SIDR_REQ_RECEIVED:
1270 req->device = sidr_param->listen_id->device;
1271 req->port = sidr_param->port;
1272 req->has_gid = false;
1273 req->service_id = sidr_param->service_id;
1274 req->pkey = sidr_param->pkey;
1275 if (req->pkey != sidr_param->bth_pkey)
1276 pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and SIDR request payload P_Key (0x%x)\n"
1277 "RDMA CMA: in the future this may cause the request to be dropped\n",
1278 sidr_param->bth_pkey, req->pkey);
1279 break;
1280 default:
1281 return -EINVAL;
1282 }
1283
1284 return 0;
1285 }
1286
1287 static bool validate_ipv4_net_dev(struct net_device *net_dev,
1288 const struct sockaddr_in *dst_addr,
1289 const struct sockaddr_in *src_addr)
1290 {
1291 __be32 daddr = dst_addr->sin_addr.s_addr,
1292 saddr = src_addr->sin_addr.s_addr;
1293 struct fib_result res;
1294 struct flowi4 fl4;
1295 int err;
1296 bool ret;
1297
1298 if (ipv4_is_multicast(saddr) || ipv4_is_lbcast(saddr) ||
1299 ipv4_is_lbcast(daddr) || ipv4_is_zeronet(saddr) ||
1300 ipv4_is_zeronet(daddr) || ipv4_is_loopback(daddr) ||
1301 ipv4_is_loopback(saddr))
1302 return false;
1303
1304 memset(&fl4, 0, sizeof(fl4));
1305 fl4.flowi4_iif = net_dev->ifindex;
1306 fl4.daddr = daddr;
1307 fl4.saddr = saddr;
1308
1309 rcu_read_lock();
1310 err = fib_lookup(dev_net(net_dev), &fl4, &res, 0);
1311 ret = err == 0 && FIB_RES_DEV(res) == net_dev;
1312 rcu_read_unlock();
1313
1314 return ret;
1315 }
1316
1317 static bool validate_ipv6_net_dev(struct net_device *net_dev,
1318 const struct sockaddr_in6 *dst_addr,
1319 const struct sockaddr_in6 *src_addr)
1320 {
1321 #if IS_ENABLED(CONFIG_IPV6)
1322 const int strict = ipv6_addr_type(&dst_addr->sin6_addr) &
1323 IPV6_ADDR_LINKLOCAL;
1324 struct rt6_info *rt = rt6_lookup(dev_net(net_dev), &dst_addr->sin6_addr,
1325 &src_addr->sin6_addr, net_dev->ifindex,
1326 NULL, strict);
1327 bool ret;
1328
1329 if (!rt)
1330 return false;
1331
1332 ret = rt->rt6i_idev->dev == net_dev;
1333 ip6_rt_put(rt);
1334
1335 return ret;
1336 #else
1337 return false;
1338 #endif
1339 }
1340
1341 static bool validate_net_dev(struct net_device *net_dev,
1342 const struct sockaddr *daddr,
1343 const struct sockaddr *saddr)
1344 {
1345 const struct sockaddr_in *daddr4 = (const struct sockaddr_in *)daddr;
1346 const struct sockaddr_in *saddr4 = (const struct sockaddr_in *)saddr;
1347 const struct sockaddr_in6 *daddr6 = (const struct sockaddr_in6 *)daddr;
1348 const struct sockaddr_in6 *saddr6 = (const struct sockaddr_in6 *)saddr;
1349
1350 switch (daddr->sa_family) {
1351 case AF_INET:
1352 return saddr->sa_family == AF_INET &&
1353 validate_ipv4_net_dev(net_dev, daddr4, saddr4);
1354
1355 case AF_INET6:
1356 return saddr->sa_family == AF_INET6 &&
1357 validate_ipv6_net_dev(net_dev, daddr6, saddr6);
1358
1359 default:
1360 return false;
1361 }
1362 }
1363
1364 static struct net_device *cma_get_net_dev(struct ib_cm_event *ib_event,
1365 struct cma_req_info *req)
1366 {
1367 struct sockaddr *listen_addr =
1368 (struct sockaddr *)&req->listen_addr_storage;
1369 struct sockaddr *src_addr = (struct sockaddr *)&req->src_addr_storage;
1370 struct net_device *net_dev;
1371 const union ib_gid *gid = req->has_gid ? &req->local_gid : NULL;
1372 int err;
1373
1374 err = cma_save_ip_info(listen_addr, src_addr, ib_event,
1375 req->service_id);
1376 if (err)
1377 return ERR_PTR(err);
1378
1379 net_dev = ib_get_net_dev_by_params(req->device, req->port, req->pkey,
1380 gid, listen_addr);
1381 if (!net_dev)
1382 return ERR_PTR(-ENODEV);
1383
1384 return net_dev;
1385 }
1386
1387 static enum rdma_ucm_port_space rdma_ps_from_service_id(__be64 service_id)
1388 {
1389 return (be64_to_cpu(service_id) >> 16) & 0xffff;
1390 }
1391
1392 static bool cma_match_private_data(struct rdma_id_private *id_priv,
1393 const struct cma_hdr *hdr)
1394 {
1395 struct sockaddr *addr = cma_src_addr(id_priv);
1396 __be32 ip4_addr;
1397 struct in6_addr ip6_addr;
1398
1399 if (cma_any_addr(addr) && !id_priv->afonly)
1400 return true;
1401
1402 switch (addr->sa_family) {
1403 case AF_INET:
1404 ip4_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
1405 if (cma_get_ip_ver(hdr) != 4)
1406 return false;
1407 if (!cma_any_addr(addr) &&
1408 hdr->dst_addr.ip4.addr != ip4_addr)
1409 return false;
1410 break;
1411 case AF_INET6:
1412 ip6_addr = ((struct sockaddr_in6 *)addr)->sin6_addr;
1413 if (cma_get_ip_ver(hdr) != 6)
1414 return false;
1415 if (!cma_any_addr(addr) &&
1416 memcmp(&hdr->dst_addr.ip6, &ip6_addr, sizeof(ip6_addr)))
1417 return false;
1418 break;
1419 case AF_IB:
1420 return true;
1421 default:
1422 return false;
1423 }
1424
1425 return true;
1426 }
1427
1428 static bool cma_protocol_roce(const struct rdma_cm_id *id)
1429 {
1430 struct ib_device *device = id->device;
1431 const int port_num = id->port_num ?: rdma_start_port(device);
1432
1433 return rdma_protocol_roce(device, port_num);
1434 }
1435
1436 static bool cma_match_net_dev(const struct rdma_cm_id *id,
1437 const struct net_device *net_dev,
1438 u8 port_num)
1439 {
1440 const struct rdma_addr *addr = &id->route.addr;
1441
1442 if (!net_dev)
1443 /* This request is an AF_IB request or a RoCE request */
1444 return (!id->port_num || id->port_num == port_num) &&
1445 (addr->src_addr.ss_family == AF_IB ||
1446 rdma_protocol_roce(id->device, port_num));
1447
1448 return !addr->dev_addr.bound_dev_if ||
1449 (net_eq(dev_net(net_dev), addr->dev_addr.net) &&
1450 addr->dev_addr.bound_dev_if == net_dev->ifindex);
1451 }
1452
1453 static struct rdma_id_private *cma_find_listener(
1454 const struct rdma_bind_list *bind_list,
1455 const struct ib_cm_id *cm_id,
1456 const struct ib_cm_event *ib_event,
1457 const struct cma_req_info *req,
1458 const struct net_device *net_dev)
1459 {
1460 struct rdma_id_private *id_priv, *id_priv_dev;
1461
1462 if (!bind_list)
1463 return ERR_PTR(-EINVAL);
1464
1465 hlist_for_each_entry(id_priv, &bind_list->owners, node) {
1466 if (cma_match_private_data(id_priv, ib_event->private_data)) {
1467 if (id_priv->id.device == cm_id->device &&
1468 cma_match_net_dev(&id_priv->id, net_dev, req->port))
1469 return id_priv;
1470 list_for_each_entry(id_priv_dev,
1471 &id_priv->listen_list,
1472 listen_list) {
1473 if (id_priv_dev->id.device == cm_id->device &&
1474 cma_match_net_dev(&id_priv_dev->id, net_dev, req->port))
1475 return id_priv_dev;
1476 }
1477 }
1478 }
1479
1480 return ERR_PTR(-EINVAL);
1481 }
1482
1483 static struct rdma_id_private *cma_id_from_event(struct ib_cm_id *cm_id,
1484 struct ib_cm_event *ib_event,
1485 struct net_device **net_dev)
1486 {
1487 struct cma_req_info req;
1488 struct rdma_bind_list *bind_list;
1489 struct rdma_id_private *id_priv;
1490 int err;
1491
1492 err = cma_save_req_info(ib_event, &req);
1493 if (err)
1494 return ERR_PTR(err);
1495
1496 *net_dev = cma_get_net_dev(ib_event, &req);
1497 if (IS_ERR(*net_dev)) {
1498 if (PTR_ERR(*net_dev) == -EAFNOSUPPORT) {
1499 /* Assuming the protocol is AF_IB */
1500 *net_dev = NULL;
1501 } else if (rdma_protocol_roce(req.device, req.port)) {
1502 /* TODO find the net dev matching the request parameters
1503 * through the RoCE GID table */
1504 *net_dev = NULL;
1505 } else {
1506 return ERR_CAST(*net_dev);
1507 }
1508 }
1509
1510 /*
1511 * Net namespace might be getting deleted while route lookup,
1512 * cm_id lookup is in progress. Therefore, perform netdevice
1513 * validation, cm_id lookup under rcu lock.
1514 * RCU lock along with netdevice state check, synchronizes with
1515 * netdevice migrating to different net namespace and also avoids
1516 * case where net namespace doesn't get deleted while lookup is in
1517 * progress.
1518 * If the device state is not IFF_UP, its properties such as ifindex
1519 * and nd_net cannot be trusted to remain valid without rcu lock.
1520 * net/core/dev.c change_net_namespace() ensures to synchronize with
1521 * ongoing operations on net device after device is closed using
1522 * synchronize_net().
1523 */
1524 rcu_read_lock();
1525 if (*net_dev) {
1526 /*
1527 * If netdevice is down, it is likely that it is administratively
1528 * down or it might be migrating to different namespace.
1529 * In that case avoid further processing, as the net namespace
1530 * or ifindex may change.
1531 */
1532 if (((*net_dev)->flags & IFF_UP) == 0) {
1533 id_priv = ERR_PTR(-EHOSTUNREACH);
1534 goto err;
1535 }
1536
1537 if (!validate_net_dev(*net_dev,
1538 (struct sockaddr *)&req.listen_addr_storage,
1539 (struct sockaddr *)&req.src_addr_storage)) {
1540 id_priv = ERR_PTR(-EHOSTUNREACH);
1541 goto err;
1542 }
1543 }
1544
1545 bind_list = cma_ps_find(*net_dev ? dev_net(*net_dev) : &init_net,
1546 rdma_ps_from_service_id(req.service_id),
1547 cma_port_from_service_id(req.service_id));
1548 id_priv = cma_find_listener(bind_list, cm_id, ib_event, &req, *net_dev);
1549 err:
1550 rcu_read_unlock();
1551 if (IS_ERR(id_priv) && *net_dev) {
1552 dev_put(*net_dev);
1553 *net_dev = NULL;
1554 }
1555 return id_priv;
1556 }
1557
1558 static inline u8 cma_user_data_offset(struct rdma_id_private *id_priv)
1559 {
1560 return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr);
1561 }
1562
1563 static void cma_cancel_route(struct rdma_id_private *id_priv)
1564 {
1565 if (rdma_cap_ib_sa(id_priv->id.device, id_priv->id.port_num)) {
1566 if (id_priv->query)
1567 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
1568 }
1569 }
1570
1571 static void cma_cancel_listens(struct rdma_id_private *id_priv)
1572 {
1573 struct rdma_id_private *dev_id_priv;
1574
1575 /*
1576 * Remove from listen_any_list to prevent added devices from spawning
1577 * additional listen requests.
1578 */
1579 mutex_lock(&lock);
1580 list_del(&id_priv->list);
1581
1582 while (!list_empty(&id_priv->listen_list)) {
1583 dev_id_priv = list_entry(id_priv->listen_list.next,
1584 struct rdma_id_private, listen_list);
1585 /* sync with device removal to avoid duplicate destruction */
1586 list_del_init(&dev_id_priv->list);
1587 list_del(&dev_id_priv->listen_list);
1588 mutex_unlock(&lock);
1589
1590 rdma_destroy_id(&dev_id_priv->id);
1591 mutex_lock(&lock);
1592 }
1593 mutex_unlock(&lock);
1594 }
1595
1596 static void cma_cancel_operation(struct rdma_id_private *id_priv,
1597 enum rdma_cm_state state)
1598 {
1599 switch (state) {
1600 case RDMA_CM_ADDR_QUERY:
1601 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
1602 break;
1603 case RDMA_CM_ROUTE_QUERY:
1604 cma_cancel_route(id_priv);
1605 break;
1606 case RDMA_CM_LISTEN:
1607 if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev)
1608 cma_cancel_listens(id_priv);
1609 break;
1610 default:
1611 break;
1612 }
1613 }
1614
1615 static void cma_release_port(struct rdma_id_private *id_priv)
1616 {
1617 struct rdma_bind_list *bind_list = id_priv->bind_list;
1618 struct net *net = id_priv->id.route.addr.dev_addr.net;
1619
1620 if (!bind_list)
1621 return;
1622
1623 mutex_lock(&lock);
1624 hlist_del(&id_priv->node);
1625 if (hlist_empty(&bind_list->owners)) {
1626 cma_ps_remove(net, bind_list->ps, bind_list->port);
1627 kfree(bind_list);
1628 }
1629 mutex_unlock(&lock);
1630 }
1631
1632 static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
1633 {
1634 struct cma_multicast *mc;
1635
1636 while (!list_empty(&id_priv->mc_list)) {
1637 mc = container_of(id_priv->mc_list.next,
1638 struct cma_multicast, list);
1639 list_del(&mc->list);
1640 if (rdma_cap_ib_mcast(id_priv->cma_dev->device,
1641 id_priv->id.port_num)) {
1642 ib_sa_free_multicast(mc->multicast.ib);
1643 kfree(mc);
1644 } else {
1645 if (mc->igmp_joined) {
1646 struct rdma_dev_addr *dev_addr =
1647 &id_priv->id.route.addr.dev_addr;
1648 struct net_device *ndev = NULL;
1649
1650 if (dev_addr->bound_dev_if)
1651 ndev = dev_get_by_index(&init_net,
1652 dev_addr->bound_dev_if);
1653 if (ndev) {
1654 cma_igmp_send(ndev,
1655 &mc->multicast.ib->rec.mgid,
1656 false);
1657 dev_put(ndev);
1658 }
1659 }
1660 kref_put(&mc->mcref, release_mc);
1661 }
1662 }
1663 }
1664
1665 void rdma_destroy_id(struct rdma_cm_id *id)
1666 {
1667 struct rdma_id_private *id_priv;
1668 enum rdma_cm_state state;
1669
1670 id_priv = container_of(id, struct rdma_id_private, id);
1671 state = cma_exch(id_priv, RDMA_CM_DESTROYING);
1672 cma_cancel_operation(id_priv, state);
1673
1674 /*
1675 * Wait for any active callback to finish. New callbacks will find
1676 * the id_priv state set to destroying and abort.
1677 */
1678 mutex_lock(&id_priv->handler_mutex);
1679 mutex_unlock(&id_priv->handler_mutex);
1680
1681 if (id_priv->cma_dev) {
1682 rdma_restrack_del(&id_priv->res);
1683 if (rdma_cap_ib_cm(id_priv->id.device, 1)) {
1684 if (id_priv->cm_id.ib)
1685 ib_destroy_cm_id(id_priv->cm_id.ib);
1686 } else if (rdma_cap_iw_cm(id_priv->id.device, 1)) {
1687 if (id_priv->cm_id.iw)
1688 iw_destroy_cm_id(id_priv->cm_id.iw);
1689 }
1690 cma_leave_mc_groups(id_priv);
1691 cma_release_dev(id_priv);
1692 }
1693
1694 cma_release_port(id_priv);
1695 cma_deref_id(id_priv);
1696 wait_for_completion(&id_priv->comp);
1697
1698 if (id_priv->internal_id)
1699 cma_deref_id(id_priv->id.context);
1700
1701 kfree(id_priv->id.route.path_rec);
1702 put_net(id_priv->id.route.addr.dev_addr.net);
1703 kfree(id_priv);
1704 }
1705 EXPORT_SYMBOL(rdma_destroy_id);
1706
1707 static int cma_rep_recv(struct rdma_id_private *id_priv)
1708 {
1709 int ret;
1710
1711 ret = cma_modify_qp_rtr(id_priv, NULL);
1712 if (ret)
1713 goto reject;
1714
1715 ret = cma_modify_qp_rts(id_priv, NULL);
1716 if (ret)
1717 goto reject;
1718
1719 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
1720 if (ret)
1721 goto reject;
1722
1723 return 0;
1724 reject:
1725 pr_debug_ratelimited("RDMA CM: CONNECT_ERROR: failed to handle reply. status %d\n", ret);
1726 cma_modify_qp_err(id_priv);
1727 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
1728 NULL, 0, NULL, 0);
1729 return ret;
1730 }
1731
1732 static void cma_set_rep_event_data(struct rdma_cm_event *event,
1733 struct ib_cm_rep_event_param *rep_data,
1734 void *private_data)
1735 {
1736 event->param.conn.private_data = private_data;
1737 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
1738 event->param.conn.responder_resources = rep_data->responder_resources;
1739 event->param.conn.initiator_depth = rep_data->initiator_depth;
1740 event->param.conn.flow_control = rep_data->flow_control;
1741 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
1742 event->param.conn.srq = rep_data->srq;
1743 event->param.conn.qp_num = rep_data->remote_qpn;
1744 }
1745
1746 static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1747 {
1748 struct rdma_id_private *id_priv = cm_id->context;
1749 struct rdma_cm_event event;
1750 int ret = 0;
1751
1752 mutex_lock(&id_priv->handler_mutex);
1753 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
1754 id_priv->state != RDMA_CM_CONNECT) ||
1755 (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
1756 id_priv->state != RDMA_CM_DISCONNECT))
1757 goto out;
1758
1759 memset(&event, 0, sizeof event);
1760 switch (ib_event->event) {
1761 case IB_CM_REQ_ERROR:
1762 case IB_CM_REP_ERROR:
1763 event.event = RDMA_CM_EVENT_UNREACHABLE;
1764 event.status = -ETIMEDOUT;
1765 break;
1766 case IB_CM_REP_RECEIVED:
1767 if (cma_comp(id_priv, RDMA_CM_CONNECT) &&
1768 (id_priv->id.qp_type != IB_QPT_UD))
1769 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1770 if (id_priv->id.qp) {
1771 event.status = cma_rep_recv(id_priv);
1772 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1773 RDMA_CM_EVENT_ESTABLISHED;
1774 } else {
1775 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
1776 }
1777 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1778 ib_event->private_data);
1779 break;
1780 case IB_CM_RTU_RECEIVED:
1781 case IB_CM_USER_ESTABLISHED:
1782 event.event = RDMA_CM_EVENT_ESTABLISHED;
1783 break;
1784 case IB_CM_DREQ_ERROR:
1785 event.status = -ETIMEDOUT; /* fall through */
1786 case IB_CM_DREQ_RECEIVED:
1787 case IB_CM_DREP_RECEIVED:
1788 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
1789 RDMA_CM_DISCONNECT))
1790 goto out;
1791 event.event = RDMA_CM_EVENT_DISCONNECTED;
1792 break;
1793 case IB_CM_TIMEWAIT_EXIT:
1794 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1795 break;
1796 case IB_CM_MRA_RECEIVED:
1797 /* ignore event */
1798 goto out;
1799 case IB_CM_REJ_RECEIVED:
1800 pr_debug_ratelimited("RDMA CM: REJECTED: %s\n", rdma_reject_msg(&id_priv->id,
1801 ib_event->param.rej_rcvd.reason));
1802 cma_modify_qp_err(id_priv);
1803 event.status = ib_event->param.rej_rcvd.reason;
1804 event.event = RDMA_CM_EVENT_REJECTED;
1805 event.param.conn.private_data = ib_event->private_data;
1806 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
1807 break;
1808 default:
1809 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
1810 ib_event->event);
1811 goto out;
1812 }
1813
1814 ret = id_priv->id.event_handler(&id_priv->id, &event);
1815 if (ret) {
1816 /* Destroy the CM ID by returning a non-zero value. */
1817 id_priv->cm_id.ib = NULL;
1818 cma_exch(id_priv, RDMA_CM_DESTROYING);
1819 mutex_unlock(&id_priv->handler_mutex);
1820 rdma_destroy_id(&id_priv->id);
1821 return ret;
1822 }
1823 out:
1824 mutex_unlock(&id_priv->handler_mutex);
1825 return ret;
1826 }
1827
1828 static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
1829 struct ib_cm_event *ib_event,
1830 struct net_device *net_dev)
1831 {
1832 struct rdma_id_private *listen_id_priv;
1833 struct rdma_id_private *id_priv;
1834 struct rdma_cm_id *id;
1835 struct rdma_route *rt;
1836 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
1837 struct sa_path_rec *path = ib_event->param.req_rcvd.primary_path;
1838 const __be64 service_id =
1839 ib_event->param.req_rcvd.primary_path->service_id;
1840 int ret;
1841
1842 listen_id_priv = container_of(listen_id, struct rdma_id_private, id);
1843 id = __rdma_create_id(listen_id->route.addr.dev_addr.net,
1844 listen_id->event_handler, listen_id->context,
1845 listen_id->ps, ib_event->param.req_rcvd.qp_type,
1846 listen_id_priv->res.kern_name);
1847 if (IS_ERR(id))
1848 return NULL;
1849
1850 id_priv = container_of(id, struct rdma_id_private, id);
1851 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
1852 (struct sockaddr *)&id->route.addr.dst_addr,
1853 listen_id, ib_event, ss_family, service_id))
1854 goto err;
1855
1856 rt = &id->route;
1857 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
1858 rt->path_rec = kmalloc_array(rt->num_paths, sizeof(*rt->path_rec),
1859 GFP_KERNEL);
1860 if (!rt->path_rec)
1861 goto err;
1862
1863 rt->path_rec[0] = *path;
1864 if (rt->num_paths == 2)
1865 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1866
1867 if (net_dev) {
1868 rdma_copy_addr(&rt->addr.dev_addr, net_dev, NULL);
1869 } else {
1870 if (!cma_protocol_roce(listen_id) &&
1871 cma_any_addr(cma_src_addr(id_priv))) {
1872 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
1873 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
1874 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
1875 } else if (!cma_any_addr(cma_src_addr(id_priv))) {
1876 ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr);
1877 if (ret)
1878 goto err;
1879 }
1880 }
1881 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
1882
1883 id_priv->state = RDMA_CM_CONNECT;
1884 return id_priv;
1885
1886 err:
1887 rdma_destroy_id(id);
1888 return NULL;
1889 }
1890
1891 static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1892 struct ib_cm_event *ib_event,
1893 struct net_device *net_dev)
1894 {
1895 struct rdma_id_private *listen_id_priv;
1896 struct rdma_id_private *id_priv;
1897 struct rdma_cm_id *id;
1898 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
1899 struct net *net = listen_id->route.addr.dev_addr.net;
1900 int ret;
1901
1902 listen_id_priv = container_of(listen_id, struct rdma_id_private, id);
1903 id = __rdma_create_id(net, listen_id->event_handler, listen_id->context,
1904 listen_id->ps, IB_QPT_UD,
1905 listen_id_priv->res.kern_name);
1906 if (IS_ERR(id))
1907 return NULL;
1908
1909 id_priv = container_of(id, struct rdma_id_private, id);
1910 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
1911 (struct sockaddr *)&id->route.addr.dst_addr,
1912 listen_id, ib_event, ss_family,
1913 ib_event->param.sidr_req_rcvd.service_id))
1914 goto err;
1915
1916 if (net_dev) {
1917 rdma_copy_addr(&id->route.addr.dev_addr, net_dev, NULL);
1918 } else {
1919 if (!cma_any_addr(cma_src_addr(id_priv))) {
1920 ret = cma_translate_addr(cma_src_addr(id_priv),
1921 &id->route.addr.dev_addr);
1922 if (ret)
1923 goto err;
1924 }
1925 }
1926
1927 id_priv->state = RDMA_CM_CONNECT;
1928 return id_priv;
1929 err:
1930 rdma_destroy_id(id);
1931 return NULL;
1932 }
1933
1934 static void cma_set_req_event_data(struct rdma_cm_event *event,
1935 struct ib_cm_req_event_param *req_data,
1936 void *private_data, int offset)
1937 {
1938 event->param.conn.private_data = private_data + offset;
1939 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1940 event->param.conn.responder_resources = req_data->responder_resources;
1941 event->param.conn.initiator_depth = req_data->initiator_depth;
1942 event->param.conn.flow_control = req_data->flow_control;
1943 event->param.conn.retry_count = req_data->retry_count;
1944 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1945 event->param.conn.srq = req_data->srq;
1946 event->param.conn.qp_num = req_data->remote_qpn;
1947 }
1948
1949 static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event)
1950 {
1951 return (((ib_event->event == IB_CM_REQ_RECEIVED) &&
1952 (ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
1953 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
1954 (id->qp_type == IB_QPT_UD)) ||
1955 (!id->qp_type));
1956 }
1957
1958 static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1959 {
1960 struct rdma_id_private *listen_id, *conn_id = NULL;
1961 struct rdma_cm_event event;
1962 struct net_device *net_dev;
1963 u8 offset;
1964 int ret;
1965
1966 listen_id = cma_id_from_event(cm_id, ib_event, &net_dev);
1967 if (IS_ERR(listen_id))
1968 return PTR_ERR(listen_id);
1969
1970 if (!cma_check_req_qp_type(&listen_id->id, ib_event)) {
1971 ret = -EINVAL;
1972 goto net_dev_put;
1973 }
1974
1975 mutex_lock(&listen_id->handler_mutex);
1976 if (listen_id->state != RDMA_CM_LISTEN) {
1977 ret = -ECONNABORTED;
1978 goto err1;
1979 }
1980
1981 memset(&event, 0, sizeof event);
1982 offset = cma_user_data_offset(listen_id);
1983 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1984 if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
1985 conn_id = cma_new_udp_id(&listen_id->id, ib_event, net_dev);
1986 event.param.ud.private_data = ib_event->private_data + offset;
1987 event.param.ud.private_data_len =
1988 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1989 } else {
1990 conn_id = cma_new_conn_id(&listen_id->id, ib_event, net_dev);
1991 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1992 ib_event->private_data, offset);
1993 }
1994 if (!conn_id) {
1995 ret = -ENOMEM;
1996 goto err1;
1997 }
1998
1999 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
2000 ret = cma_acquire_dev(conn_id, listen_id);
2001 if (ret)
2002 goto err2;
2003
2004 conn_id->cm_id.ib = cm_id;
2005 cm_id->context = conn_id;
2006 cm_id->cm_handler = cma_ib_handler;
2007
2008 /*
2009 * Protect against the user destroying conn_id from another thread
2010 * until we're done accessing it.
2011 */
2012 atomic_inc(&conn_id->refcount);
2013 ret = conn_id->id.event_handler(&conn_id->id, &event);
2014 if (ret)
2015 goto err3;
2016 /*
2017 * Acquire mutex to prevent user executing rdma_destroy_id()
2018 * while we're accessing the cm_id.
2019 */
2020 mutex_lock(&lock);
2021 if (cma_comp(conn_id, RDMA_CM_CONNECT) &&
2022 (conn_id->id.qp_type != IB_QPT_UD))
2023 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
2024 mutex_unlock(&lock);
2025 mutex_unlock(&conn_id->handler_mutex);
2026 mutex_unlock(&listen_id->handler_mutex);
2027 cma_deref_id(conn_id);
2028 if (net_dev)
2029 dev_put(net_dev);
2030 return 0;
2031
2032 err3:
2033 cma_deref_id(conn_id);
2034 /* Destroy the CM ID by returning a non-zero value. */
2035 conn_id->cm_id.ib = NULL;
2036 err2:
2037 cma_exch(conn_id, RDMA_CM_DESTROYING);
2038 mutex_unlock(&conn_id->handler_mutex);
2039 err1:
2040 mutex_unlock(&listen_id->handler_mutex);
2041 if (conn_id)
2042 rdma_destroy_id(&conn_id->id);
2043
2044 net_dev_put:
2045 if (net_dev)
2046 dev_put(net_dev);
2047
2048 return ret;
2049 }
2050
2051 __be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr)
2052 {
2053 if (addr->sa_family == AF_IB)
2054 return ((struct sockaddr_ib *) addr)->sib_sid;
2055
2056 return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr)));
2057 }
2058 EXPORT_SYMBOL(rdma_get_service_id);
2059
2060 void rdma_read_gids(struct rdma_cm_id *cm_id, union ib_gid *sgid,
2061 union ib_gid *dgid)
2062 {
2063 struct rdma_addr *addr = &cm_id->route.addr;
2064
2065 if (!cm_id->device) {
2066 if (sgid)
2067 memset(sgid, 0, sizeof(*sgid));
2068 if (dgid)
2069 memset(dgid, 0, sizeof(*dgid));
2070 return;
2071 }
2072
2073 if (rdma_protocol_roce(cm_id->device, cm_id->port_num)) {
2074 if (sgid)
2075 rdma_ip2gid((struct sockaddr *)&addr->src_addr, sgid);
2076 if (dgid)
2077 rdma_ip2gid((struct sockaddr *)&addr->dst_addr, dgid);
2078 } else {
2079 if (sgid)
2080 rdma_addr_get_sgid(&addr->dev_addr, sgid);
2081 if (dgid)
2082 rdma_addr_get_dgid(&addr->dev_addr, dgid);
2083 }
2084 }
2085 EXPORT_SYMBOL(rdma_read_gids);
2086
2087 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
2088 {
2089 struct rdma_id_private *id_priv = iw_id->context;
2090 struct rdma_cm_event event;
2091 int ret = 0;
2092 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
2093 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
2094
2095 mutex_lock(&id_priv->handler_mutex);
2096 if (id_priv->state != RDMA_CM_CONNECT)
2097 goto out;
2098
2099 memset(&event, 0, sizeof event);
2100 switch (iw_event->event) {
2101 case IW_CM_EVENT_CLOSE:
2102 event.event = RDMA_CM_EVENT_DISCONNECTED;
2103 break;
2104 case IW_CM_EVENT_CONNECT_REPLY:
2105 memcpy(cma_src_addr(id_priv), laddr,
2106 rdma_addr_size(laddr));
2107 memcpy(cma_dst_addr(id_priv), raddr,
2108 rdma_addr_size(raddr));
2109 switch (iw_event->status) {
2110 case 0:
2111 event.event = RDMA_CM_EVENT_ESTABLISHED;
2112 event.param.conn.initiator_depth = iw_event->ird;
2113 event.param.conn.responder_resources = iw_event->ord;
2114 break;
2115 case -ECONNRESET:
2116 case -ECONNREFUSED:
2117 event.event = RDMA_CM_EVENT_REJECTED;
2118 break;
2119 case -ETIMEDOUT:
2120 event.event = RDMA_CM_EVENT_UNREACHABLE;
2121 break;
2122 default:
2123 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
2124 break;
2125 }
2126 break;
2127 case IW_CM_EVENT_ESTABLISHED:
2128 event.event = RDMA_CM_EVENT_ESTABLISHED;
2129 event.param.conn.initiator_depth = iw_event->ird;
2130 event.param.conn.responder_resources = iw_event->ord;
2131 break;
2132 default:
2133 goto out;
2134 }
2135
2136 event.status = iw_event->status;
2137 event.param.conn.private_data = iw_event->private_data;
2138 event.param.conn.private_data_len = iw_event->private_data_len;
2139 ret = id_priv->id.event_handler(&id_priv->id, &event);
2140 if (ret) {
2141 /* Destroy the CM ID by returning a non-zero value. */
2142 id_priv->cm_id.iw = NULL;
2143 cma_exch(id_priv, RDMA_CM_DESTROYING);
2144 mutex_unlock(&id_priv->handler_mutex);
2145 rdma_destroy_id(&id_priv->id);
2146 return ret;
2147 }
2148
2149 out:
2150 mutex_unlock(&id_priv->handler_mutex);
2151 return ret;
2152 }
2153
2154 static int iw_conn_req_handler(struct iw_cm_id *cm_id,
2155 struct iw_cm_event *iw_event)
2156 {
2157 struct rdma_cm_id *new_cm_id;
2158 struct rdma_id_private *listen_id, *conn_id;
2159 struct rdma_cm_event event;
2160 int ret = -ECONNABORTED;
2161 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
2162 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
2163
2164 listen_id = cm_id->context;
2165
2166 mutex_lock(&listen_id->handler_mutex);
2167 if (listen_id->state != RDMA_CM_LISTEN)
2168 goto out;
2169
2170 /* Create a new RDMA id for the new IW CM ID */
2171 new_cm_id = __rdma_create_id(listen_id->id.route.addr.dev_addr.net,
2172 listen_id->id.event_handler,
2173 listen_id->id.context,
2174 RDMA_PS_TCP, IB_QPT_RC,
2175 listen_id->res.kern_name);
2176 if (IS_ERR(new_cm_id)) {
2177 ret = -ENOMEM;
2178 goto out;
2179 }
2180 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
2181 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
2182 conn_id->state = RDMA_CM_CONNECT;
2183
2184 ret = rdma_translate_ip(laddr, &conn_id->id.route.addr.dev_addr);
2185 if (ret) {
2186 mutex_unlock(&conn_id->handler_mutex);
2187 rdma_destroy_id(new_cm_id);
2188 goto out;
2189 }
2190
2191 ret = cma_acquire_dev(conn_id, listen_id);
2192 if (ret) {
2193 mutex_unlock(&conn_id->handler_mutex);
2194 rdma_destroy_id(new_cm_id);
2195 goto out;
2196 }
2197
2198 conn_id->cm_id.iw = cm_id;
2199 cm_id->context = conn_id;
2200 cm_id->cm_handler = cma_iw_handler;
2201
2202 memcpy(cma_src_addr(conn_id), laddr, rdma_addr_size(laddr));
2203 memcpy(cma_dst_addr(conn_id), raddr, rdma_addr_size(raddr));
2204
2205 memset(&event, 0, sizeof event);
2206 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
2207 event.param.conn.private_data = iw_event->private_data;
2208 event.param.conn.private_data_len = iw_event->private_data_len;
2209 event.param.conn.initiator_depth = iw_event->ird;
2210 event.param.conn.responder_resources = iw_event->ord;
2211
2212 /*
2213 * Protect against the user destroying conn_id from another thread
2214 * until we're done accessing it.
2215 */
2216 atomic_inc(&conn_id->refcount);
2217 ret = conn_id->id.event_handler(&conn_id->id, &event);
2218 if (ret) {
2219 /* User wants to destroy the CM ID */
2220 conn_id->cm_id.iw = NULL;
2221 cma_exch(conn_id, RDMA_CM_DESTROYING);
2222 mutex_unlock(&conn_id->handler_mutex);
2223 cma_deref_id(conn_id);
2224 rdma_destroy_id(&conn_id->id);
2225 goto out;
2226 }
2227
2228 mutex_unlock(&conn_id->handler_mutex);
2229 cma_deref_id(conn_id);
2230
2231 out:
2232 mutex_unlock(&listen_id->handler_mutex);
2233 return ret;
2234 }
2235
2236 static int cma_ib_listen(struct rdma_id_private *id_priv)
2237 {
2238 struct sockaddr *addr;
2239 struct ib_cm_id *id;
2240 __be64 svc_id;
2241
2242 addr = cma_src_addr(id_priv);
2243 svc_id = rdma_get_service_id(&id_priv->id, addr);
2244 id = ib_cm_insert_listen(id_priv->id.device, cma_req_handler, svc_id);
2245 if (IS_ERR(id))
2246 return PTR_ERR(id);
2247 id_priv->cm_id.ib = id;
2248
2249 return 0;
2250 }
2251
2252 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
2253 {
2254 int ret;
2255 struct iw_cm_id *id;
2256
2257 id = iw_create_cm_id(id_priv->id.device,
2258 iw_conn_req_handler,
2259 id_priv);
2260 if (IS_ERR(id))
2261 return PTR_ERR(id);
2262
2263 id->tos = id_priv->tos;
2264 id_priv->cm_id.iw = id;
2265
2266 memcpy(&id_priv->cm_id.iw->local_addr, cma_src_addr(id_priv),
2267 rdma_addr_size(cma_src_addr(id_priv)));
2268
2269 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
2270
2271 if (ret) {
2272 iw_destroy_cm_id(id_priv->cm_id.iw);
2273 id_priv->cm_id.iw = NULL;
2274 }
2275
2276 return ret;
2277 }
2278
2279 static int cma_listen_handler(struct rdma_cm_id *id,
2280 struct rdma_cm_event *event)
2281 {
2282 struct rdma_id_private *id_priv = id->context;
2283
2284 id->context = id_priv->id.context;
2285 id->event_handler = id_priv->id.event_handler;
2286 return id_priv->id.event_handler(id, event);
2287 }
2288
2289 static void cma_listen_on_dev(struct rdma_id_private *id_priv,
2290 struct cma_device *cma_dev)
2291 {
2292 struct rdma_id_private *dev_id_priv;
2293 struct rdma_cm_id *id;
2294 struct net *net = id_priv->id.route.addr.dev_addr.net;
2295 int ret;
2296
2297 if (cma_family(id_priv) == AF_IB && !rdma_cap_ib_cm(cma_dev->device, 1))
2298 return;
2299
2300 id = __rdma_create_id(net, cma_listen_handler, id_priv, id_priv->id.ps,
2301 id_priv->id.qp_type, id_priv->res.kern_name);
2302 if (IS_ERR(id))
2303 return;
2304
2305 dev_id_priv = container_of(id, struct rdma_id_private, id);
2306
2307 dev_id_priv->state = RDMA_CM_ADDR_BOUND;
2308 memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv),
2309 rdma_addr_size(cma_src_addr(id_priv)));
2310
2311 _cma_attach_to_dev(dev_id_priv, cma_dev);
2312 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
2313 atomic_inc(&id_priv->refcount);
2314 dev_id_priv->internal_id = 1;
2315 dev_id_priv->afonly = id_priv->afonly;
2316
2317 ret = rdma_listen(id, id_priv->backlog);
2318 if (ret)
2319 pr_warn("RDMA CMA: cma_listen_on_dev, error %d, listening on device %s\n",
2320 ret, cma_dev->device->name);
2321 }
2322
2323 static void cma_listen_on_all(struct rdma_id_private *id_priv)
2324 {
2325 struct cma_device *cma_dev;
2326
2327 mutex_lock(&lock);
2328 list_add_tail(&id_priv->list, &listen_any_list);
2329 list_for_each_entry(cma_dev, &dev_list, list)
2330 cma_listen_on_dev(id_priv, cma_dev);
2331 mutex_unlock(&lock);
2332 }
2333
2334 void rdma_set_service_type(struct rdma_cm_id *id, int tos)
2335 {
2336 struct rdma_id_private *id_priv;
2337
2338 id_priv = container_of(id, struct rdma_id_private, id);
2339 id_priv->tos = (u8) tos;
2340 id_priv->tos_set = true;
2341 }
2342 EXPORT_SYMBOL(rdma_set_service_type);
2343
2344 static void cma_query_handler(int status, struct sa_path_rec *path_rec,
2345 void *context)
2346 {
2347 struct cma_work *work = context;
2348 struct rdma_route *route;
2349
2350 route = &work->id->id.route;
2351
2352 if (!status) {
2353 route->num_paths = 1;
2354 *route->path_rec = *path_rec;
2355 } else {
2356 work->old_state = RDMA_CM_ROUTE_QUERY;
2357 work->new_state = RDMA_CM_ADDR_RESOLVED;
2358 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
2359 work->event.status = status;
2360 pr_debug_ratelimited("RDMA CM: ROUTE_ERROR: failed to query path. status %d\n",
2361 status);
2362 }
2363
2364 queue_work(cma_wq, &work->work);
2365 }
2366
2367 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
2368 struct cma_work *work)
2369 {
2370 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2371 struct sa_path_rec path_rec;
2372 ib_sa_comp_mask comp_mask;
2373 struct sockaddr_in6 *sin6;
2374 struct sockaddr_ib *sib;
2375
2376 memset(&path_rec, 0, sizeof path_rec);
2377
2378 if (rdma_cap_opa_ah(id_priv->id.device, id_priv->id.port_num))
2379 path_rec.rec_type = SA_PATH_REC_TYPE_OPA;
2380 else
2381 path_rec.rec_type = SA_PATH_REC_TYPE_IB;
2382 rdma_addr_get_sgid(dev_addr, &path_rec.sgid);
2383 rdma_addr_get_dgid(dev_addr, &path_rec.dgid);
2384 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
2385 path_rec.numb_path = 1;
2386 path_rec.reversible = 1;
2387 path_rec.service_id = rdma_get_service_id(&id_priv->id,
2388 cma_dst_addr(id_priv));
2389
2390 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
2391 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
2392 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
2393
2394 switch (cma_family(id_priv)) {
2395 case AF_INET:
2396 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
2397 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
2398 break;
2399 case AF_INET6:
2400 sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
2401 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
2402 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2403 break;
2404 case AF_IB:
2405 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
2406 path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20);
2407 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2408 break;
2409 }
2410
2411 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
2412 id_priv->id.port_num, &path_rec,
2413 comp_mask, timeout_ms,
2414 GFP_KERNEL, cma_query_handler,
2415 work, &id_priv->query);
2416
2417 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
2418 }
2419
2420 static void cma_work_handler(struct work_struct *_work)
2421 {
2422 struct cma_work *work = container_of(_work, struct cma_work, work);
2423 struct rdma_id_private *id_priv = work->id;
2424 int destroy = 0;
2425
2426 mutex_lock(&id_priv->handler_mutex);
2427 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
2428 goto out;
2429
2430 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
2431 cma_exch(id_priv, RDMA_CM_DESTROYING);
2432 destroy = 1;
2433 }
2434 out:
2435 mutex_unlock(&id_priv->handler_mutex);
2436 cma_deref_id(id_priv);
2437 if (destroy)
2438 rdma_destroy_id(&id_priv->id);
2439 kfree(work);
2440 }
2441
2442 static void cma_ndev_work_handler(struct work_struct *_work)
2443 {
2444 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
2445 struct rdma_id_private *id_priv = work->id;
2446 int destroy = 0;
2447
2448 mutex_lock(&id_priv->handler_mutex);
2449 if (id_priv->state == RDMA_CM_DESTROYING ||
2450 id_priv->state == RDMA_CM_DEVICE_REMOVAL)
2451 goto out;
2452
2453 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
2454 cma_exch(id_priv, RDMA_CM_DESTROYING);
2455 destroy = 1;
2456 }
2457
2458 out:
2459 mutex_unlock(&id_priv->handler_mutex);
2460 cma_deref_id(id_priv);
2461 if (destroy)
2462 rdma_destroy_id(&id_priv->id);
2463 kfree(work);
2464 }
2465
2466 static void cma_init_resolve_route_work(struct cma_work *work,
2467 struct rdma_id_private *id_priv)
2468 {
2469 work->id = id_priv;
2470 INIT_WORK(&work->work, cma_work_handler);
2471 work->old_state = RDMA_CM_ROUTE_QUERY;
2472 work->new_state = RDMA_CM_ROUTE_RESOLVED;
2473 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2474 }
2475
2476 static void cma_init_resolve_addr_work(struct cma_work *work,
2477 struct rdma_id_private *id_priv)
2478 {
2479 work->id = id_priv;
2480 INIT_WORK(&work->work, cma_work_handler);
2481 work->old_state = RDMA_CM_ADDR_QUERY;
2482 work->new_state = RDMA_CM_ADDR_RESOLVED;
2483 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2484 }
2485
2486 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
2487 {
2488 struct rdma_route *route = &id_priv->id.route;
2489 struct cma_work *work;
2490 int ret;
2491
2492 work = kzalloc(sizeof *work, GFP_KERNEL);
2493 if (!work)
2494 return -ENOMEM;
2495
2496 cma_init_resolve_route_work(work, id_priv);
2497
2498 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
2499 if (!route->path_rec) {
2500 ret = -ENOMEM;
2501 goto err1;
2502 }
2503
2504 ret = cma_query_ib_route(id_priv, timeout_ms, work);
2505 if (ret)
2506 goto err2;
2507
2508 return 0;
2509 err2:
2510 kfree(route->path_rec);
2511 route->path_rec = NULL;
2512 err1:
2513 kfree(work);
2514 return ret;
2515 }
2516
2517 static enum ib_gid_type cma_route_gid_type(enum rdma_network_type network_type,
2518 unsigned long supported_gids,
2519 enum ib_gid_type default_gid)
2520 {
2521 if ((network_type == RDMA_NETWORK_IPV4 ||
2522 network_type == RDMA_NETWORK_IPV6) &&
2523 test_bit(IB_GID_TYPE_ROCE_UDP_ENCAP, &supported_gids))
2524 return IB_GID_TYPE_ROCE_UDP_ENCAP;
2525
2526 return default_gid;
2527 }
2528
2529 /*
2530 * cma_iboe_set_path_rec_l2_fields() is helper function which sets
2531 * path record type based on GID type.
2532 * It also sets up other L2 fields which includes destination mac address
2533 * netdev ifindex, of the path record.
2534 * It returns the netdev of the bound interface for this path record entry.
2535 */
2536 static struct net_device *
2537 cma_iboe_set_path_rec_l2_fields(struct rdma_id_private *id_priv)
2538 {
2539 struct rdma_route *route = &id_priv->id.route;
2540 enum ib_gid_type gid_type = IB_GID_TYPE_ROCE;
2541 struct rdma_addr *addr = &route->addr;
2542 unsigned long supported_gids;
2543 struct net_device *ndev;
2544
2545 if (!addr->dev_addr.bound_dev_if)
2546 return NULL;
2547
2548 ndev = dev_get_by_index(addr->dev_addr.net,
2549 addr->dev_addr.bound_dev_if);
2550 if (!ndev)
2551 return NULL;
2552
2553 supported_gids = roce_gid_type_mask_support(id_priv->id.device,
2554 id_priv->id.port_num);
2555 gid_type = cma_route_gid_type(addr->dev_addr.network,
2556 supported_gids,
2557 id_priv->gid_type);
2558 /* Use the hint from IP Stack to select GID Type */
2559 if (gid_type < ib_network_to_gid_type(addr->dev_addr.network))
2560 gid_type = ib_network_to_gid_type(addr->dev_addr.network);
2561 route->path_rec->rec_type = sa_conv_gid_to_pathrec_type(gid_type);
2562
2563 route->path_rec->roce.route_resolved = true;
2564 sa_path_set_ndev(route->path_rec, addr->dev_addr.net);
2565 sa_path_set_ifindex(route->path_rec, ndev->ifindex);
2566 sa_path_set_dmac(route->path_rec, addr->dev_addr.dst_dev_addr);
2567 return ndev;
2568 }
2569
2570 int rdma_set_ib_path(struct rdma_cm_id *id,
2571 struct sa_path_rec *path_rec)
2572 {
2573 struct rdma_id_private *id_priv;
2574 struct net_device *ndev;
2575 int ret;
2576
2577 id_priv = container_of(id, struct rdma_id_private, id);
2578 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2579 RDMA_CM_ROUTE_RESOLVED))
2580 return -EINVAL;
2581
2582 id->route.path_rec = kmemdup(path_rec, sizeof(*path_rec),
2583 GFP_KERNEL);
2584 if (!id->route.path_rec) {
2585 ret = -ENOMEM;
2586 goto err;
2587 }
2588
2589 if (rdma_protocol_roce(id->device, id->port_num)) {
2590 ndev = cma_iboe_set_path_rec_l2_fields(id_priv);
2591 if (!ndev) {
2592 ret = -ENODEV;
2593 goto err_free;
2594 }
2595 dev_put(ndev);
2596 }
2597
2598 id->route.num_paths = 1;
2599 return 0;
2600
2601 err_free:
2602 kfree(id->route.path_rec);
2603 id->route.path_rec = NULL;
2604 err:
2605 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
2606 return ret;
2607 }
2608 EXPORT_SYMBOL(rdma_set_ib_path);
2609
2610 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
2611 {
2612 struct cma_work *work;
2613
2614 work = kzalloc(sizeof *work, GFP_KERNEL);
2615 if (!work)
2616 return -ENOMEM;
2617
2618 cma_init_resolve_route_work(work, id_priv);
2619 queue_work(cma_wq, &work->work);
2620 return 0;
2621 }
2622
2623 static int iboe_tos_to_sl(struct net_device *ndev, int tos)
2624 {
2625 int prio;
2626 struct net_device *dev;
2627
2628 prio = rt_tos2priority(tos);
2629 dev = is_vlan_dev(ndev) ? vlan_dev_real_dev(ndev) : ndev;
2630 if (dev->num_tc)
2631 return netdev_get_prio_tc_map(dev, prio);
2632
2633 #if IS_ENABLED(CONFIG_VLAN_8021Q)
2634 if (is_vlan_dev(ndev))
2635 return (vlan_dev_get_egress_qos_mask(ndev, prio) &
2636 VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
2637 #endif
2638 return 0;
2639 }
2640
2641 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
2642 {
2643 struct rdma_route *route = &id_priv->id.route;
2644 struct rdma_addr *addr = &route->addr;
2645 struct cma_work *work;
2646 int ret;
2647 struct net_device *ndev;
2648
2649 u8 default_roce_tos = id_priv->cma_dev->default_roce_tos[id_priv->id.port_num -
2650 rdma_start_port(id_priv->cma_dev->device)];
2651 u8 tos = id_priv->tos_set ? id_priv->tos : default_roce_tos;
2652
2653
2654 work = kzalloc(sizeof *work, GFP_KERNEL);
2655 if (!work)
2656 return -ENOMEM;
2657
2658 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
2659 if (!route->path_rec) {
2660 ret = -ENOMEM;
2661 goto err1;
2662 }
2663
2664 route->num_paths = 1;
2665
2666 ndev = cma_iboe_set_path_rec_l2_fields(id_priv);
2667 if (!ndev) {
2668 ret = -ENODEV;
2669 goto err2;
2670 }
2671
2672 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
2673 &route->path_rec->sgid);
2674 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.dst_addr,
2675 &route->path_rec->dgid);
2676
2677 if (((struct sockaddr *)&id_priv->id.route.addr.dst_addr)->sa_family != AF_IB)
2678 /* TODO: get the hoplimit from the inet/inet6 device */
2679 route->path_rec->hop_limit = addr->dev_addr.hoplimit;
2680 else
2681 route->path_rec->hop_limit = 1;
2682 route->path_rec->reversible = 1;
2683 route->path_rec->pkey = cpu_to_be16(0xffff);
2684 route->path_rec->mtu_selector = IB_SA_EQ;
2685 route->path_rec->sl = iboe_tos_to_sl(ndev, tos);
2686 route->path_rec->traffic_class = tos;
2687 route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
2688 route->path_rec->rate_selector = IB_SA_EQ;
2689 route->path_rec->rate = iboe_get_rate(ndev);
2690 dev_put(ndev);
2691 route->path_rec->packet_life_time_selector = IB_SA_EQ;
2692 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
2693 if (!route->path_rec->mtu) {
2694 ret = -EINVAL;
2695 goto err2;
2696 }
2697
2698 cma_init_resolve_route_work(work, id_priv);
2699 queue_work(cma_wq, &work->work);
2700
2701 return 0;
2702
2703 err2:
2704 kfree(route->path_rec);
2705 route->path_rec = NULL;
2706 err1:
2707 kfree(work);
2708 return ret;
2709 }
2710
2711 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
2712 {
2713 struct rdma_id_private *id_priv;
2714 int ret;
2715
2716 id_priv = container_of(id, struct rdma_id_private, id);
2717 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
2718 return -EINVAL;
2719
2720 atomic_inc(&id_priv->refcount);
2721 if (rdma_cap_ib_sa(id->device, id->port_num))
2722 ret = cma_resolve_ib_route(id_priv, timeout_ms);
2723 else if (rdma_protocol_roce(id->device, id->port_num))
2724 ret = cma_resolve_iboe_route(id_priv);
2725 else if (rdma_protocol_iwarp(id->device, id->port_num))
2726 ret = cma_resolve_iw_route(id_priv, timeout_ms);
2727 else
2728 ret = -ENOSYS;
2729
2730 if (ret)
2731 goto err;
2732
2733 return 0;
2734 err:
2735 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
2736 cma_deref_id(id_priv);
2737 return ret;
2738 }
2739 EXPORT_SYMBOL(rdma_resolve_route);
2740
2741 static void cma_set_loopback(struct sockaddr *addr)
2742 {
2743 switch (addr->sa_family) {
2744 case AF_INET:
2745 ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
2746 break;
2747 case AF_INET6:
2748 ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr,
2749 0, 0, 0, htonl(1));
2750 break;
2751 default:
2752 ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr,
2753 0, 0, 0, htonl(1));
2754 break;
2755 }
2756 }
2757
2758 static int cma_bind_loopback(struct rdma_id_private *id_priv)
2759 {
2760 struct cma_device *cma_dev, *cur_dev;
2761 union ib_gid gid;
2762 enum ib_port_state port_state;
2763 u16 pkey;
2764 int ret;
2765 u8 p;
2766
2767 cma_dev = NULL;
2768 mutex_lock(&lock);
2769 list_for_each_entry(cur_dev, &dev_list, list) {
2770 if (cma_family(id_priv) == AF_IB &&
2771 !rdma_cap_ib_cm(cur_dev->device, 1))
2772 continue;
2773
2774 if (!cma_dev)
2775 cma_dev = cur_dev;
2776
2777 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
2778 if (!ib_get_cached_port_state(cur_dev->device, p, &port_state) &&
2779 port_state == IB_PORT_ACTIVE) {
2780 cma_dev = cur_dev;
2781 goto port_found;
2782 }
2783 }
2784 }
2785
2786 if (!cma_dev) {
2787 ret = -ENODEV;
2788 goto out;
2789 }
2790
2791 p = 1;
2792
2793 port_found:
2794 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid, NULL);
2795 if (ret)
2796 goto out;
2797
2798 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
2799 if (ret)
2800 goto out;
2801
2802 id_priv->id.route.addr.dev_addr.dev_type =
2803 (rdma_protocol_ib(cma_dev->device, p)) ?
2804 ARPHRD_INFINIBAND : ARPHRD_ETHER;
2805
2806 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2807 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
2808 id_priv->id.port_num = p;
2809 cma_attach_to_dev(id_priv, cma_dev);
2810 cma_set_loopback(cma_src_addr(id_priv));
2811 out:
2812 mutex_unlock(&lock);
2813 return ret;
2814 }
2815
2816 static void addr_handler(int status, struct sockaddr *src_addr,
2817 struct rdma_dev_addr *dev_addr, void *context)
2818 {
2819 struct rdma_id_private *id_priv = context;
2820 struct rdma_cm_event event;
2821
2822 memset(&event, 0, sizeof event);
2823 mutex_lock(&id_priv->handler_mutex);
2824 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
2825 RDMA_CM_ADDR_RESOLVED))
2826 goto out;
2827
2828 memcpy(cma_src_addr(id_priv), src_addr, rdma_addr_size(src_addr));
2829 if (!status && !id_priv->cma_dev) {
2830 status = cma_acquire_dev(id_priv, NULL);
2831 if (status)
2832 pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to acquire device. status %d\n",
2833 status);
2834 } else {
2835 pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to resolve IP. status %d\n", status);
2836 }
2837
2838 if (status) {
2839 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2840 RDMA_CM_ADDR_BOUND))
2841 goto out;
2842 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2843 event.status = status;
2844 } else
2845 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2846
2847 if (id_priv->id.event_handler(&id_priv->id, &event)) {
2848 cma_exch(id_priv, RDMA_CM_DESTROYING);
2849 mutex_unlock(&id_priv->handler_mutex);
2850 cma_deref_id(id_priv);
2851 rdma_destroy_id(&id_priv->id);
2852 return;
2853 }
2854 out:
2855 mutex_unlock(&id_priv->handler_mutex);
2856 cma_deref_id(id_priv);
2857 }
2858
2859 static int cma_resolve_loopback(struct rdma_id_private *id_priv)
2860 {
2861 struct cma_work *work;
2862 union ib_gid gid;
2863 int ret;
2864
2865 work = kzalloc(sizeof *work, GFP_KERNEL);
2866 if (!work)
2867 return -ENOMEM;
2868
2869 if (!id_priv->cma_dev) {
2870 ret = cma_bind_loopback(id_priv);
2871 if (ret)
2872 goto err;
2873 }
2874
2875 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2876 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
2877
2878 cma_init_resolve_addr_work(work, id_priv);
2879 queue_work(cma_wq, &work->work);
2880 return 0;
2881 err:
2882 kfree(work);
2883 return ret;
2884 }
2885
2886 static int cma_resolve_ib_addr(struct rdma_id_private *id_priv)
2887 {
2888 struct cma_work *work;
2889 int ret;
2890
2891 work = kzalloc(sizeof *work, GFP_KERNEL);
2892 if (!work)
2893 return -ENOMEM;
2894
2895 if (!id_priv->cma_dev) {
2896 ret = cma_resolve_ib_dev(id_priv);
2897 if (ret)
2898 goto err;
2899 }
2900
2901 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *)
2902 &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr));
2903
2904 cma_init_resolve_addr_work(work, id_priv);
2905 queue_work(cma_wq, &work->work);
2906 return 0;
2907 err:
2908 kfree(work);
2909 return ret;
2910 }
2911
2912 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2913 struct sockaddr *dst_addr)
2914 {
2915 if (!src_addr || !src_addr->sa_family) {
2916 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
2917 src_addr->sa_family = dst_addr->sa_family;
2918 if (IS_ENABLED(CONFIG_IPV6) &&
2919 dst_addr->sa_family == AF_INET6) {
2920 struct sockaddr_in6 *src_addr6 = (struct sockaddr_in6 *) src_addr;
2921 struct sockaddr_in6 *dst_addr6 = (struct sockaddr_in6 *) dst_addr;
2922 src_addr6->sin6_scope_id = dst_addr6->sin6_scope_id;
2923 if (ipv6_addr_type(&dst_addr6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
2924 id->route.addr.dev_addr.bound_dev_if = dst_addr6->sin6_scope_id;
2925 } else if (dst_addr->sa_family == AF_IB) {
2926 ((struct sockaddr_ib *) src_addr)->sib_pkey =
2927 ((struct sockaddr_ib *) dst_addr)->sib_pkey;
2928 }
2929 }
2930 return rdma_bind_addr(id, src_addr);
2931 }
2932
2933 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2934 struct sockaddr *dst_addr, int timeout_ms)
2935 {
2936 struct rdma_id_private *id_priv;
2937 int ret;
2938
2939 id_priv = container_of(id, struct rdma_id_private, id);
2940 memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr));
2941 if (id_priv->state == RDMA_CM_IDLE) {
2942 ret = cma_bind_addr(id, src_addr, dst_addr);
2943 if (ret) {
2944 memset(cma_dst_addr(id_priv), 0, rdma_addr_size(dst_addr));
2945 return ret;
2946 }
2947 }
2948
2949 if (cma_family(id_priv) != dst_addr->sa_family) {
2950 memset(cma_dst_addr(id_priv), 0, rdma_addr_size(dst_addr));
2951 return -EINVAL;
2952 }
2953
2954 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY)) {
2955 memset(cma_dst_addr(id_priv), 0, rdma_addr_size(dst_addr));
2956 return -EINVAL;
2957 }
2958
2959 atomic_inc(&id_priv->refcount);
2960 if (cma_any_addr(dst_addr)) {
2961 ret = cma_resolve_loopback(id_priv);
2962 } else {
2963 if (dst_addr->sa_family == AF_IB) {
2964 ret = cma_resolve_ib_addr(id_priv);
2965 } else {
2966 ret = rdma_resolve_ip(cma_src_addr(id_priv),
2967 dst_addr, &id->route.addr.dev_addr,
2968 timeout_ms, addr_handler, id_priv);
2969 }
2970 }
2971 if (ret)
2972 goto err;
2973
2974 return 0;
2975 err:
2976 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
2977 cma_deref_id(id_priv);
2978 return ret;
2979 }
2980 EXPORT_SYMBOL(rdma_resolve_addr);
2981
2982 int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
2983 {
2984 struct rdma_id_private *id_priv;
2985 unsigned long flags;
2986 int ret;
2987
2988 id_priv = container_of(id, struct rdma_id_private, id);
2989 spin_lock_irqsave(&id_priv->lock, flags);
2990 if (reuse || id_priv->state == RDMA_CM_IDLE) {
2991 id_priv->reuseaddr = reuse;
2992 ret = 0;
2993 } else {
2994 ret = -EINVAL;
2995 }
2996 spin_unlock_irqrestore(&id_priv->lock, flags);
2997 return ret;
2998 }
2999 EXPORT_SYMBOL(rdma_set_reuseaddr);
3000
3001 int rdma_set_afonly(struct rdma_cm_id *id, int afonly)
3002 {
3003 struct rdma_id_private *id_priv;
3004 unsigned long flags;
3005 int ret;
3006
3007 id_priv = container_of(id, struct rdma_id_private, id);
3008 spin_lock_irqsave(&id_priv->lock, flags);
3009 if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) {
3010 id_priv->options |= (1 << CMA_OPTION_AFONLY);
3011 id_priv->afonly = afonly;
3012 ret = 0;
3013 } else {
3014 ret = -EINVAL;
3015 }
3016 spin_unlock_irqrestore(&id_priv->lock, flags);
3017 return ret;
3018 }
3019 EXPORT_SYMBOL(rdma_set_afonly);
3020
3021 static void cma_bind_port(struct rdma_bind_list *bind_list,
3022 struct rdma_id_private *id_priv)
3023 {
3024 struct sockaddr *addr;
3025 struct sockaddr_ib *sib;
3026 u64 sid, mask;
3027 __be16 port;
3028
3029 addr = cma_src_addr(id_priv);
3030 port = htons(bind_list->port);
3031
3032 switch (addr->sa_family) {
3033 case AF_INET:
3034 ((struct sockaddr_in *) addr)->sin_port = port;
3035 break;
3036 case AF_INET6:
3037 ((struct sockaddr_in6 *) addr)->sin6_port = port;
3038 break;
3039 case AF_IB:
3040 sib = (struct sockaddr_ib *) addr;
3041 sid = be64_to_cpu(sib->sib_sid);
3042 mask = be64_to_cpu(sib->sib_sid_mask);
3043 sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port));
3044 sib->sib_sid_mask = cpu_to_be64(~0ULL);
3045 break;
3046 }
3047 id_priv->bind_list = bind_list;
3048 hlist_add_head(&id_priv->node, &bind_list->owners);
3049 }
3050
3051 static int cma_alloc_port(enum rdma_ucm_port_space ps,
3052 struct rdma_id_private *id_priv, unsigned short snum)
3053 {
3054 struct rdma_bind_list *bind_list;
3055 int ret;
3056
3057 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
3058 if (!bind_list)
3059 return -ENOMEM;
3060
3061 ret = cma_ps_alloc(id_priv->id.route.addr.dev_addr.net, ps, bind_list,
3062 snum);
3063 if (ret < 0)
3064 goto err;
3065
3066 bind_list->ps = ps;
3067 bind_list->port = (unsigned short)ret;
3068 cma_bind_port(bind_list, id_priv);
3069 return 0;
3070 err:
3071 kfree(bind_list);
3072 return ret == -ENOSPC ? -EADDRNOTAVAIL : ret;
3073 }
3074
3075 static int cma_port_is_unique(struct rdma_bind_list *bind_list,
3076 struct rdma_id_private *id_priv)
3077 {
3078 struct rdma_id_private *cur_id;
3079 struct sockaddr *daddr = cma_dst_addr(id_priv);
3080 struct sockaddr *saddr = cma_src_addr(id_priv);
3081 __be16 dport = cma_port(daddr);
3082
3083 hlist_for_each_entry(cur_id, &bind_list->owners, node) {
3084 struct sockaddr *cur_daddr = cma_dst_addr(cur_id);
3085 struct sockaddr *cur_saddr = cma_src_addr(cur_id);
3086 __be16 cur_dport = cma_port(cur_daddr);
3087
3088 if (id_priv == cur_id)
3089 continue;
3090
3091 /* different dest port -> unique */
3092 if (!cma_any_port(daddr) &&
3093 !cma_any_port(cur_daddr) &&
3094 (dport != cur_dport))
3095 continue;
3096
3097 /* different src address -> unique */
3098 if (!cma_any_addr(saddr) &&
3099 !cma_any_addr(cur_saddr) &&
3100 cma_addr_cmp(saddr, cur_saddr))
3101 continue;
3102
3103 /* different dst address -> unique */
3104 if (!cma_any_addr(daddr) &&
3105 !cma_any_addr(cur_daddr) &&
3106 cma_addr_cmp(daddr, cur_daddr))
3107 continue;
3108
3109 return -EADDRNOTAVAIL;
3110 }
3111 return 0;
3112 }
3113
3114 static int cma_alloc_any_port(enum rdma_ucm_port_space ps,
3115 struct rdma_id_private *id_priv)
3116 {
3117 static unsigned int last_used_port;
3118 int low, high, remaining;
3119 unsigned int rover;
3120 struct net *net = id_priv->id.route.addr.dev_addr.net;
3121
3122 inet_get_local_port_range(net, &low, &high);
3123 remaining = (high - low) + 1;
3124 rover = prandom_u32() % remaining + low;
3125 retry:
3126 if (last_used_port != rover) {
3127 struct rdma_bind_list *bind_list;
3128 int ret;
3129
3130 bind_list = cma_ps_find(net, ps, (unsigned short)rover);
3131
3132 if (!bind_list) {
3133 ret = cma_alloc_port(ps, id_priv, rover);
3134 } else {
3135 ret = cma_port_is_unique(bind_list, id_priv);
3136 if (!ret)
3137 cma_bind_port(bind_list, id_priv);
3138 }
3139 /*
3140 * Remember previously used port number in order to avoid
3141 * re-using same port immediately after it is closed.
3142 */
3143 if (!ret)
3144 last_used_port = rover;
3145 if (ret != -EADDRNOTAVAIL)
3146 return ret;
3147 }
3148 if (--remaining) {
3149 rover++;
3150 if ((rover < low) || (rover > high))
3151 rover = low;
3152 goto retry;
3153 }
3154 return -EADDRNOTAVAIL;
3155 }
3156
3157 /*
3158 * Check that the requested port is available. This is called when trying to
3159 * bind to a specific port, or when trying to listen on a bound port. In
3160 * the latter case, the provided id_priv may already be on the bind_list, but
3161 * we still need to check that it's okay to start listening.
3162 */
3163 static int cma_check_port(struct rdma_bind_list *bind_list,
3164 struct rdma_id_private *id_priv, uint8_t reuseaddr)
3165 {
3166 struct rdma_id_private *cur_id;
3167 struct sockaddr *addr, *cur_addr;
3168
3169 addr = cma_src_addr(id_priv);
3170 hlist_for_each_entry(cur_id, &bind_list->owners, node) {
3171 if (id_priv == cur_id)
3172 continue;
3173
3174 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr &&
3175 cur_id->reuseaddr)
3176 continue;
3177
3178 cur_addr = cma_src_addr(cur_id);
3179 if (id_priv->afonly && cur_id->afonly &&
3180 (addr->sa_family != cur_addr->sa_family))
3181 continue;
3182
3183 if (cma_any_addr(addr) || cma_any_addr(cur_addr))
3184 return -EADDRNOTAVAIL;
3185
3186 if (!cma_addr_cmp(addr, cur_addr))
3187 return -EADDRINUSE;
3188 }
3189 return 0;
3190 }
3191
3192 static int cma_use_port(enum rdma_ucm_port_space ps,
3193 struct rdma_id_private *id_priv)
3194 {
3195 struct rdma_bind_list *bind_list;
3196 unsigned short snum;
3197 int ret;
3198
3199 snum = ntohs(cma_port(cma_src_addr(id_priv)));
3200 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
3201 return -EACCES;
3202
3203 bind_list = cma_ps_find(id_priv->id.route.addr.dev_addr.net, ps, snum);
3204 if (!bind_list) {
3205 ret = cma_alloc_port(ps, id_priv, snum);
3206 } else {
3207 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
3208 if (!ret)
3209 cma_bind_port(bind_list, id_priv);
3210 }
3211 return ret;
3212 }
3213
3214 static int cma_bind_listen(struct rdma_id_private *id_priv)
3215 {
3216 struct rdma_bind_list *bind_list = id_priv->bind_list;
3217 int ret = 0;
3218
3219 mutex_lock(&lock);
3220 if (bind_list->owners.first->next)
3221 ret = cma_check_port(bind_list, id_priv, 0);
3222 mutex_unlock(&lock);
3223 return ret;
3224 }
3225
3226 static enum rdma_ucm_port_space
3227 cma_select_inet_ps(struct rdma_id_private *id_priv)
3228 {
3229 switch (id_priv->id.ps) {
3230 case RDMA_PS_TCP:
3231 case RDMA_PS_UDP:
3232 case RDMA_PS_IPOIB:
3233 case RDMA_PS_IB:
3234 return id_priv->id.ps;
3235 default:
3236
3237 return 0;
3238 }
3239 }
3240
3241 static enum rdma_ucm_port_space
3242 cma_select_ib_ps(struct rdma_id_private *id_priv)
3243 {
3244 enum rdma_ucm_port_space ps = 0;
3245 struct sockaddr_ib *sib;
3246 u64 sid_ps, mask, sid;
3247
3248 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
3249 mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK;
3250 sid = be64_to_cpu(sib->sib_sid) & mask;
3251
3252 if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) {
3253 sid_ps = RDMA_IB_IP_PS_IB;
3254 ps = RDMA_PS_IB;
3255 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) &&
3256 (sid == (RDMA_IB_IP_PS_TCP & mask))) {
3257 sid_ps = RDMA_IB_IP_PS_TCP;
3258 ps = RDMA_PS_TCP;
3259 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) &&
3260 (sid == (RDMA_IB_IP_PS_UDP & mask))) {
3261 sid_ps = RDMA_IB_IP_PS_UDP;
3262 ps = RDMA_PS_UDP;
3263 }
3264
3265 if (ps) {
3266 sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib)));
3267 sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK |
3268 be64_to_cpu(sib->sib_sid_mask));
3269 }
3270 return ps;
3271 }
3272
3273 static int cma_get_port(struct rdma_id_private *id_priv)
3274 {
3275 enum rdma_ucm_port_space ps;
3276 int ret;
3277
3278 if (cma_family(id_priv) != AF_IB)
3279 ps = cma_select_inet_ps(id_priv);
3280 else
3281 ps = cma_select_ib_ps(id_priv);
3282 if (!ps)
3283 return -EPROTONOSUPPORT;
3284
3285 mutex_lock(&lock);
3286 if (cma_any_port(cma_src_addr(id_priv)))
3287 ret = cma_alloc_any_port(ps, id_priv);
3288 else
3289 ret = cma_use_port(ps, id_priv);
3290 mutex_unlock(&lock);
3291
3292 return ret;
3293 }
3294
3295 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
3296 struct sockaddr *addr)
3297 {
3298 #if IS_ENABLED(CONFIG_IPV6)
3299 struct sockaddr_in6 *sin6;
3300
3301 if (addr->sa_family != AF_INET6)
3302 return 0;
3303
3304 sin6 = (struct sockaddr_in6 *) addr;
3305
3306 if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL))
3307 return 0;
3308
3309 if (!sin6->sin6_scope_id)
3310 return -EINVAL;
3311
3312 dev_addr->bound_dev_if = sin6->sin6_scope_id;
3313 #endif
3314 return 0;
3315 }
3316
3317 int rdma_listen(struct rdma_cm_id *id, int backlog)
3318 {
3319 struct rdma_id_private *id_priv;
3320 int ret;
3321
3322 id_priv = container_of(id, struct rdma_id_private, id);
3323 if (id_priv->state == RDMA_CM_IDLE) {
3324 id->route.addr.src_addr.ss_family = AF_INET;
3325 ret = rdma_bind_addr(id, cma_src_addr(id_priv));
3326 if (ret)
3327 return ret;
3328 }
3329
3330 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
3331 return -EINVAL;
3332
3333 if (id_priv->reuseaddr) {
3334 ret = cma_bind_listen(id_priv);
3335 if (ret)
3336 goto err;
3337 }
3338
3339 id_priv->backlog = backlog;
3340 if (id->device) {
3341 if (rdma_cap_ib_cm(id->device, 1)) {
3342 ret = cma_ib_listen(id_priv);
3343 if (ret)
3344 goto err;
3345 } else if (rdma_cap_iw_cm(id->device, 1)) {
3346 ret = cma_iw_listen(id_priv, backlog);
3347 if (ret)
3348 goto err;
3349 } else {
3350 ret = -ENOSYS;
3351 goto err;
3352 }
3353 } else
3354 cma_listen_on_all(id_priv);
3355
3356 return 0;
3357 err:
3358 id_priv->backlog = 0;
3359 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
3360 return ret;
3361 }
3362 EXPORT_SYMBOL(rdma_listen);
3363
3364 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
3365 {
3366 struct rdma_id_private *id_priv;
3367 int ret;
3368 struct sockaddr *daddr;
3369
3370 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 &&
3371 addr->sa_family != AF_IB)
3372 return -EAFNOSUPPORT;
3373
3374 id_priv = container_of(id, struct rdma_id_private, id);
3375 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
3376 return -EINVAL;
3377
3378 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
3379 if (ret)
3380 goto err1;
3381
3382 memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr));
3383 if (!cma_any_addr(addr)) {
3384 ret = cma_translate_addr(addr, &id->route.addr.dev_addr);
3385 if (ret)
3386 goto err1;
3387
3388 ret = cma_acquire_dev(id_priv, NULL);
3389 if (ret)
3390 goto err1;
3391 }
3392
3393 if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) {
3394 if (addr->sa_family == AF_INET)
3395 id_priv->afonly = 1;
3396 #if IS_ENABLED(CONFIG_IPV6)
3397 else if (addr->sa_family == AF_INET6) {
3398 struct net *net = id_priv->id.route.addr.dev_addr.net;
3399
3400 id_priv->afonly = net->ipv6.sysctl.bindv6only;
3401 }
3402 #endif
3403 }
3404 daddr = cma_dst_addr(id_priv);
3405 daddr->sa_family = addr->sa_family;
3406
3407 ret = cma_get_port(id_priv);
3408 if (ret)
3409 goto err2;
3410
3411 return 0;
3412 err2:
3413 if (id_priv->cma_dev) {
3414 rdma_restrack_del(&id_priv->res);
3415 cma_release_dev(id_priv);
3416 }
3417 err1:
3418 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
3419 return ret;
3420 }
3421 EXPORT_SYMBOL(rdma_bind_addr);
3422
3423 static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv)
3424 {
3425 struct cma_hdr *cma_hdr;
3426
3427 cma_hdr = hdr;
3428 cma_hdr->cma_version = CMA_VERSION;
3429 if (cma_family(id_priv) == AF_INET) {
3430 struct sockaddr_in *src4, *dst4;
3431
3432 src4 = (struct sockaddr_in *) cma_src_addr(id_priv);
3433 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv);
3434
3435 cma_set_ip_ver(cma_hdr, 4);
3436 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
3437 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
3438 cma_hdr->port = src4->sin_port;
3439 } else if (cma_family(id_priv) == AF_INET6) {
3440 struct sockaddr_in6 *src6, *dst6;
3441
3442 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
3443 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv);
3444
3445 cma_set_ip_ver(cma_hdr, 6);
3446 cma_hdr->src_addr.ip6 = src6->sin6_addr;
3447 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
3448 cma_hdr->port = src6->sin6_port;
3449 }
3450 return 0;
3451 }
3452
3453 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
3454 struct ib_cm_event *ib_event)
3455 {
3456 struct rdma_id_private *id_priv = cm_id->context;
3457 struct rdma_cm_event event;
3458 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
3459 int ret = 0;
3460
3461 mutex_lock(&id_priv->handler_mutex);
3462 if (id_priv->state != RDMA_CM_CONNECT)
3463 goto out;
3464
3465 memset(&event, 0, sizeof event);
3466 switch (ib_event->event) {
3467 case IB_CM_SIDR_REQ_ERROR:
3468 event.event = RDMA_CM_EVENT_UNREACHABLE;
3469 event.status = -ETIMEDOUT;
3470 break;
3471 case IB_CM_SIDR_REP_RECEIVED:
3472 event.param.ud.private_data = ib_event->private_data;
3473 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
3474 if (rep->status != IB_SIDR_SUCCESS) {
3475 event.event = RDMA_CM_EVENT_UNREACHABLE;
3476 event.status = ib_event->param.sidr_rep_rcvd.status;
3477 pr_debug_ratelimited("RDMA CM: UNREACHABLE: bad SIDR reply. status %d\n",
3478 event.status);
3479 break;
3480 }
3481 ret = cma_set_qkey(id_priv, rep->qkey);
3482 if (ret) {
3483 pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to set qkey. status %d\n", ret);
3484 event.event = RDMA_CM_EVENT_ADDR_ERROR;
3485 event.status = ret;
3486 break;
3487 }
3488 ib_init_ah_attr_from_path(id_priv->id.device,
3489 id_priv->id.port_num,
3490 id_priv->id.route.path_rec,
3491 &event.param.ud.ah_attr);
3492 event.param.ud.qp_num = rep->qpn;
3493 event.param.ud.qkey = rep->qkey;
3494 event.event = RDMA_CM_EVENT_ESTABLISHED;
3495 event.status = 0;
3496 break;
3497 default:
3498 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
3499 ib_event->event);
3500 goto out;
3501 }
3502
3503 ret = id_priv->id.event_handler(&id_priv->id, &event);
3504 if (ret) {
3505 /* Destroy the CM ID by returning a non-zero value. */
3506 id_priv->cm_id.ib = NULL;
3507 cma_exch(id_priv, RDMA_CM_DESTROYING);
3508 mutex_unlock(&id_priv->handler_mutex);
3509 rdma_destroy_id(&id_priv->id);
3510 return ret;
3511 }
3512 out:
3513 mutex_unlock(&id_priv->handler_mutex);
3514 return ret;
3515 }
3516
3517 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
3518 struct rdma_conn_param *conn_param)
3519 {
3520 struct ib_cm_sidr_req_param req;
3521 struct ib_cm_id *id;
3522 void *private_data;
3523 u8 offset;
3524 int ret;
3525
3526 memset(&req, 0, sizeof req);
3527 offset = cma_user_data_offset(id_priv);
3528 req.private_data_len = offset + conn_param->private_data_len;
3529 if (req.private_data_len < conn_param->private_data_len)
3530 return -EINVAL;
3531
3532 if (req.private_data_len) {
3533 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3534 if (!private_data)
3535 return -ENOMEM;
3536 } else {
3537 private_data = NULL;
3538 }
3539
3540 if (conn_param->private_data && conn_param->private_data_len)
3541 memcpy(private_data + offset, conn_param->private_data,
3542 conn_param->private_data_len);
3543
3544 if (private_data) {
3545 ret = cma_format_hdr(private_data, id_priv);
3546 if (ret)
3547 goto out;
3548 req.private_data = private_data;
3549 }
3550
3551 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
3552 id_priv);
3553 if (IS_ERR(id)) {
3554 ret = PTR_ERR(id);
3555 goto out;
3556 }
3557 id_priv->cm_id.ib = id;
3558
3559 req.path = id_priv->id.route.path_rec;
3560 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
3561 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
3562 req.max_cm_retries = CMA_MAX_CM_RETRIES;
3563
3564 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
3565 if (ret) {
3566 ib_destroy_cm_id(id_priv->cm_id.ib);
3567 id_priv->cm_id.ib = NULL;
3568 }
3569 out:
3570 kfree(private_data);
3571 return ret;
3572 }
3573
3574 static int cma_connect_ib(struct rdma_id_private *id_priv,
3575 struct rdma_conn_param *conn_param)
3576 {
3577 struct ib_cm_req_param req;
3578 struct rdma_route *route;
3579 void *private_data;
3580 struct ib_cm_id *id;
3581 u8 offset;
3582 int ret;
3583
3584 memset(&req, 0, sizeof req);
3585 offset = cma_user_data_offset(id_priv);
3586 req.private_data_len = offset + conn_param->private_data_len;
3587 if (req.private_data_len < conn_param->private_data_len)
3588 return -EINVAL;
3589
3590 if (req.private_data_len) {
3591 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3592 if (!private_data)
3593 return -ENOMEM;
3594 } else {
3595 private_data = NULL;
3596 }
3597
3598 if (conn_param->private_data && conn_param->private_data_len)
3599 memcpy(private_data + offset, conn_param->private_data,
3600 conn_param->private_data_len);
3601
3602 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
3603 if (IS_ERR(id)) {
3604 ret = PTR_ERR(id);
3605 goto out;
3606 }
3607 id_priv->cm_id.ib = id;
3608
3609 route = &id_priv->id.route;
3610 if (private_data) {
3611 ret = cma_format_hdr(private_data, id_priv);
3612 if (ret)
3613 goto out;
3614 req.private_data = private_data;
3615 }
3616
3617 req.primary_path = &route->path_rec[0];
3618 if (route->num_paths == 2)
3619 req.alternate_path = &route->path_rec[1];
3620
3621 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
3622 req.qp_num = id_priv->qp_num;
3623 req.qp_type = id_priv->id.qp_type;
3624 req.starting_psn = id_priv->seq_num;
3625 req.responder_resources = conn_param->responder_resources;
3626 req.initiator_depth = conn_param->initiator_depth;
3627 req.flow_control = conn_param->flow_control;
3628 req.retry_count = min_t(u8, 7, conn_param->retry_count);
3629 req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
3630 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3631 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3632 req.max_cm_retries = CMA_MAX_CM_RETRIES;
3633 req.srq = id_priv->srq ? 1 : 0;
3634
3635 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
3636 out:
3637 if (ret && !IS_ERR(id)) {
3638 ib_destroy_cm_id(id);
3639 id_priv->cm_id.ib = NULL;
3640 }
3641
3642 kfree(private_data);
3643 return ret;
3644 }
3645
3646 static int cma_connect_iw(struct rdma_id_private *id_priv,
3647 struct rdma_conn_param *conn_param)
3648 {
3649 struct iw_cm_id *cm_id;
3650 int ret;
3651 struct iw_cm_conn_param iw_param;
3652
3653 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
3654 if (IS_ERR(cm_id))
3655 return PTR_ERR(cm_id);
3656
3657 cm_id->tos = id_priv->tos;
3658 id_priv->cm_id.iw = cm_id;
3659
3660 memcpy(&cm_id->local_addr, cma_src_addr(id_priv),
3661 rdma_addr_size(cma_src_addr(id_priv)));
3662 memcpy(&cm_id->remote_addr, cma_dst_addr(id_priv),
3663 rdma_addr_size(cma_dst_addr(id_priv)));
3664
3665 ret = cma_modify_qp_rtr(id_priv, conn_param);
3666 if (ret)
3667 goto out;
3668
3669 if (conn_param) {
3670 iw_param.ord = conn_param->initiator_depth;
3671 iw_param.ird = conn_param->responder_resources;
3672 iw_param.private_data = conn_param->private_data;
3673 iw_param.private_data_len = conn_param->private_data_len;
3674 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
3675 } else {
3676 memset(&iw_param, 0, sizeof iw_param);
3677 iw_param.qpn = id_priv->qp_num;
3678 }
3679 ret = iw_cm_connect(cm_id, &iw_param);
3680 out:
3681 if (ret) {
3682 iw_destroy_cm_id(cm_id);
3683 id_priv->cm_id.iw = NULL;
3684 }
3685 return ret;
3686 }
3687
3688 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
3689 {
3690 struct rdma_id_private *id_priv;
3691 int ret;
3692
3693 id_priv = container_of(id, struct rdma_id_private, id);
3694 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
3695 return -EINVAL;
3696
3697 if (!id->qp) {
3698 id_priv->qp_num = conn_param->qp_num;
3699 id_priv->srq = conn_param->srq;
3700 }
3701
3702 if (rdma_cap_ib_cm(id->device, id->port_num)) {
3703 if (id->qp_type == IB_QPT_UD)
3704 ret = cma_resolve_ib_udp(id_priv, conn_param);
3705 else
3706 ret = cma_connect_ib(id_priv, conn_param);
3707 } else if (rdma_cap_iw_cm(id->device, id->port_num))
3708 ret = cma_connect_iw(id_priv, conn_param);
3709 else
3710 ret = -ENOSYS;
3711 if (ret)
3712 goto err;
3713
3714 return 0;
3715 err:
3716 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
3717 return ret;
3718 }
3719 EXPORT_SYMBOL(rdma_connect);
3720
3721 static int cma_accept_ib(struct rdma_id_private *id_priv,
3722 struct rdma_conn_param *conn_param)
3723 {
3724 struct ib_cm_rep_param rep;
3725 int ret;
3726
3727 ret = cma_modify_qp_rtr(id_priv, conn_param);
3728 if (ret)
3729 goto out;
3730
3731 ret = cma_modify_qp_rts(id_priv, conn_param);
3732 if (ret)
3733 goto out;
3734
3735 memset(&rep, 0, sizeof rep);
3736 rep.qp_num = id_priv->qp_num;
3737 rep.starting_psn = id_priv->seq_num;
3738 rep.private_data = conn_param->private_data;
3739 rep.private_data_len = conn_param->private_data_len;
3740 rep.responder_resources = conn_param->responder_resources;
3741 rep.initiator_depth = conn_param->initiator_depth;
3742 rep.failover_accepted = 0;
3743 rep.flow_control = conn_param->flow_control;
3744 rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
3745 rep.srq = id_priv->srq ? 1 : 0;
3746
3747 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
3748 out:
3749 return ret;
3750 }
3751
3752 static int cma_accept_iw(struct rdma_id_private *id_priv,
3753 struct rdma_conn_param *conn_param)
3754 {
3755 struct iw_cm_conn_param iw_param;
3756 int ret;
3757
3758 if (!conn_param)
3759 return -EINVAL;
3760
3761 ret = cma_modify_qp_rtr(id_priv, conn_param);
3762 if (ret)
3763 return ret;
3764
3765 iw_param.ord = conn_param->initiator_depth;
3766 iw_param.ird = conn_param->responder_resources;
3767 iw_param.private_data = conn_param->private_data;
3768 iw_param.private_data_len = conn_param->private_data_len;
3769 if (id_priv->id.qp) {
3770 iw_param.qpn = id_priv->qp_num;
3771 } else
3772 iw_param.qpn = conn_param->qp_num;
3773
3774 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
3775 }
3776
3777 static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
3778 enum ib_cm_sidr_status status, u32 qkey,
3779 const void *private_data, int private_data_len)
3780 {
3781 struct ib_cm_sidr_rep_param rep;
3782 int ret;
3783
3784 memset(&rep, 0, sizeof rep);
3785 rep.status = status;
3786 if (status == IB_SIDR_SUCCESS) {
3787 ret = cma_set_qkey(id_priv, qkey);
3788 if (ret)
3789 return ret;
3790 rep.qp_num = id_priv->qp_num;
3791 rep.qkey = id_priv->qkey;
3792 }
3793 rep.private_data = private_data;
3794 rep.private_data_len = private_data_len;
3795
3796 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
3797 }
3798
3799 int __rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param,
3800 const char *caller)
3801 {
3802 struct rdma_id_private *id_priv;
3803 int ret;
3804
3805 id_priv = container_of(id, struct rdma_id_private, id);
3806
3807 if (caller)
3808 id_priv->res.kern_name = caller;
3809 else
3810 rdma_restrack_set_task(&id_priv->res, current);
3811
3812 if (!cma_comp(id_priv, RDMA_CM_CONNECT))
3813 return -EINVAL;
3814
3815 if (!id->qp && conn_param) {
3816 id_priv->qp_num = conn_param->qp_num;
3817 id_priv->srq = conn_param->srq;
3818 }
3819
3820 if (rdma_cap_ib_cm(id->device, id->port_num)) {
3821 if (id->qp_type == IB_QPT_UD) {
3822 if (conn_param)
3823 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
3824 conn_param->qkey,
3825 conn_param->private_data,
3826 conn_param->private_data_len);
3827 else
3828 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
3829 0, NULL, 0);
3830 } else {
3831 if (conn_param)
3832 ret = cma_accept_ib(id_priv, conn_param);
3833 else
3834 ret = cma_rep_recv(id_priv);
3835 }
3836 } else if (rdma_cap_iw_cm(id->device, id->port_num))
3837 ret = cma_accept_iw(id_priv, conn_param);
3838 else
3839 ret = -ENOSYS;
3840
3841 if (ret)
3842 goto reject;
3843
3844 return 0;
3845 reject:
3846 cma_modify_qp_err(id_priv);
3847 rdma_reject(id, NULL, 0);
3848 return ret;
3849 }
3850 EXPORT_SYMBOL(__rdma_accept);
3851
3852 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
3853 {
3854 struct rdma_id_private *id_priv;
3855 int ret;
3856
3857 id_priv = container_of(id, struct rdma_id_private, id);
3858 if (!id_priv->cm_id.ib)
3859 return -EINVAL;
3860
3861 switch (id->device->node_type) {
3862 case RDMA_NODE_IB_CA:
3863 ret = ib_cm_notify(id_priv->cm_id.ib, event);
3864 break;
3865 default:
3866 ret = 0;
3867 break;
3868 }
3869 return ret;
3870 }
3871 EXPORT_SYMBOL(rdma_notify);
3872
3873 int rdma_reject(struct rdma_cm_id *id, const void *private_data,
3874 u8 private_data_len)
3875 {
3876 struct rdma_id_private *id_priv;
3877 int ret;
3878
3879 id_priv = container_of(id, struct rdma_id_private, id);
3880 if (!id_priv->cm_id.ib)
3881 return -EINVAL;
3882
3883 if (rdma_cap_ib_cm(id->device, id->port_num)) {
3884 if (id->qp_type == IB_QPT_UD)
3885 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0,
3886 private_data, private_data_len);
3887 else
3888 ret = ib_send_cm_rej(id_priv->cm_id.ib,
3889 IB_CM_REJ_CONSUMER_DEFINED, NULL,
3890 0, private_data, private_data_len);
3891 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
3892 ret = iw_cm_reject(id_priv->cm_id.iw,
3893 private_data, private_data_len);
3894 } else
3895 ret = -ENOSYS;
3896
3897 return ret;
3898 }
3899 EXPORT_SYMBOL(rdma_reject);
3900
3901 int rdma_disconnect(struct rdma_cm_id *id)
3902 {
3903 struct rdma_id_private *id_priv;
3904 int ret;
3905
3906 id_priv = container_of(id, struct rdma_id_private, id);
3907 if (!id_priv->cm_id.ib)
3908 return -EINVAL;
3909
3910 if (rdma_cap_ib_cm(id->device, id->port_num)) {
3911 ret = cma_modify_qp_err(id_priv);
3912 if (ret)
3913 goto out;
3914 /* Initiate or respond to a disconnect. */
3915 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
3916 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
3917 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
3918 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
3919 } else
3920 ret = -EINVAL;
3921
3922 out:
3923 return ret;
3924 }
3925 EXPORT_SYMBOL(rdma_disconnect);
3926
3927 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
3928 {
3929 struct rdma_id_private *id_priv;
3930 struct cma_multicast *mc = multicast->context;
3931 struct rdma_cm_event event;
3932 int ret = 0;
3933
3934 id_priv = mc->id_priv;
3935 mutex_lock(&id_priv->handler_mutex);
3936 if (id_priv->state != RDMA_CM_ADDR_BOUND &&
3937 id_priv->state != RDMA_CM_ADDR_RESOLVED)
3938 goto out;
3939
3940 if (!status)
3941 status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey));
3942 else
3943 pr_debug_ratelimited("RDMA CM: MULTICAST_ERROR: failed to join multicast. status %d\n",
3944 status);
3945 mutex_lock(&id_priv->qp_mutex);
3946 if (!status && id_priv->id.qp) {
3947 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
3948 be16_to_cpu(multicast->rec.mlid));
3949 if (status)
3950 pr_debug_ratelimited("RDMA CM: MULTICAST_ERROR: failed to attach QP. status %d\n",
3951 status);
3952 }
3953 mutex_unlock(&id_priv->qp_mutex);
3954
3955 memset(&event, 0, sizeof event);
3956 event.status = status;
3957 event.param.ud.private_data = mc->context;
3958 if (!status) {
3959 struct rdma_dev_addr *dev_addr =
3960 &id_priv->id.route.addr.dev_addr;
3961 struct net_device *ndev =
3962 dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
3963 enum ib_gid_type gid_type =
3964 id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
3965 rdma_start_port(id_priv->cma_dev->device)];
3966
3967 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
3968 ret = ib_init_ah_from_mcmember(id_priv->id.device,
3969 id_priv->id.port_num,
3970 &multicast->rec,
3971 ndev, gid_type,
3972 &event.param.ud.ah_attr);
3973 if (ret)
3974 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
3975
3976 event.param.ud.qp_num = 0xFFFFFF;
3977 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
3978 if (ndev)
3979 dev_put(ndev);
3980 } else
3981 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
3982
3983 ret = id_priv->id.event_handler(&id_priv->id, &event);
3984 if (ret) {
3985 cma_exch(id_priv, RDMA_CM_DESTROYING);
3986 mutex_unlock(&id_priv->handler_mutex);
3987 rdma_destroy_id(&id_priv->id);
3988 return 0;
3989 }
3990
3991 out:
3992 mutex_unlock(&id_priv->handler_mutex);
3993 return 0;
3994 }
3995
3996 static void cma_set_mgid(struct rdma_id_private *id_priv,
3997 struct sockaddr *addr, union ib_gid *mgid)
3998 {
3999 unsigned char mc_map[MAX_ADDR_LEN];
4000 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
4001 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
4002 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
4003
4004 if (cma_any_addr(addr)) {
4005 memset(mgid, 0, sizeof *mgid);
4006 } else if ((addr->sa_family == AF_INET6) &&
4007 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
4008 0xFF10A01B)) {
4009 /* IPv6 address is an SA assigned MGID. */
4010 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
4011 } else if (addr->sa_family == AF_IB) {
4012 memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid);
4013 } else if ((addr->sa_family == AF_INET6)) {
4014 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
4015 if (id_priv->id.ps == RDMA_PS_UDP)
4016 mc_map[7] = 0x01; /* Use RDMA CM signature */
4017 *mgid = *(union ib_gid *) (mc_map + 4);
4018 } else {
4019 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
4020 if (id_priv->id.ps == RDMA_PS_UDP)
4021 mc_map[7] = 0x01; /* Use RDMA CM signature */
4022 *mgid = *(union ib_gid *) (mc_map + 4);
4023 }
4024 }
4025
4026 static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
4027 struct cma_multicast *mc)
4028 {
4029 struct ib_sa_mcmember_rec rec;
4030 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
4031 ib_sa_comp_mask comp_mask;
4032 int ret;
4033
4034 ib_addr_get_mgid(dev_addr, &rec.mgid);
4035 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
4036 &rec.mgid, &rec);
4037 if (ret)
4038 return ret;
4039
4040 ret = cma_set_qkey(id_priv, 0);
4041 if (ret)
4042 return ret;
4043
4044 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
4045 rec.qkey = cpu_to_be32(id_priv->qkey);
4046 rdma_addr_get_sgid(dev_addr, &rec.port_gid);
4047 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
4048 rec.join_state = mc->join_state;
4049
4050 if ((rec.join_state == BIT(SENDONLY_FULLMEMBER_JOIN)) &&
4051 (!ib_sa_sendonly_fullmem_support(&sa_client,
4052 id_priv->id.device,
4053 id_priv->id.port_num))) {
4054 pr_warn("RDMA CM: %s port %u Unable to multicast join\n"
4055 "RDMA CM: SM doesn't support Send Only Full Member option\n",
4056 id_priv->id.device->name, id_priv->id.port_num);
4057 return -EOPNOTSUPP;
4058 }
4059
4060 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
4061 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
4062 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
4063 IB_SA_MCMEMBER_REC_FLOW_LABEL |
4064 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
4065
4066 if (id_priv->id.ps == RDMA_PS_IPOIB)
4067 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
4068 IB_SA_MCMEMBER_REC_RATE_SELECTOR |
4069 IB_SA_MCMEMBER_REC_MTU_SELECTOR |
4070 IB_SA_MCMEMBER_REC_MTU |
4071 IB_SA_MCMEMBER_REC_HOP_LIMIT;
4072
4073 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
4074 id_priv->id.port_num, &rec,
4075 comp_mask, GFP_KERNEL,
4076 cma_ib_mc_handler, mc);
4077 return PTR_ERR_OR_ZERO(mc->multicast.ib);
4078 }
4079
4080 static void iboe_mcast_work_handler(struct work_struct *work)
4081 {
4082 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
4083 struct cma_multicast *mc = mw->mc;
4084 struct ib_sa_multicast *m = mc->multicast.ib;
4085
4086 mc->multicast.ib->context = mc;
4087 cma_ib_mc_handler(0, m);
4088 kref_put(&mc->mcref, release_mc);
4089 kfree(mw);
4090 }
4091
4092 static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid,
4093 enum ib_gid_type gid_type)
4094 {
4095 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
4096 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
4097
4098 if (cma_any_addr(addr)) {
4099 memset(mgid, 0, sizeof *mgid);
4100 } else if (addr->sa_family == AF_INET6) {
4101 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
4102 } else {
4103 mgid->raw[0] =
4104 (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) ? 0 : 0xff;
4105 mgid->raw[1] =
4106 (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) ? 0 : 0x0e;
4107 mgid->raw[2] = 0;
4108 mgid->raw[3] = 0;
4109 mgid->raw[4] = 0;
4110 mgid->raw[5] = 0;
4111 mgid->raw[6] = 0;
4112 mgid->raw[7] = 0;
4113 mgid->raw[8] = 0;
4114 mgid->raw[9] = 0;
4115 mgid->raw[10] = 0xff;
4116 mgid->raw[11] = 0xff;
4117 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
4118 }
4119 }
4120
4121 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
4122 struct cma_multicast *mc)
4123 {
4124 struct iboe_mcast_work *work;
4125 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
4126 int err = 0;
4127 struct sockaddr *addr = (struct sockaddr *)&mc->addr;
4128 struct net_device *ndev = NULL;
4129 enum ib_gid_type gid_type;
4130 bool send_only;
4131
4132 send_only = mc->join_state == BIT(SENDONLY_FULLMEMBER_JOIN);
4133
4134 if (cma_zero_addr((struct sockaddr *)&mc->addr))
4135 return -EINVAL;
4136
4137 work = kzalloc(sizeof *work, GFP_KERNEL);
4138 if (!work)
4139 return -ENOMEM;
4140
4141 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
4142 if (!mc->multicast.ib) {
4143 err = -ENOMEM;
4144 goto out1;
4145 }
4146
4147 gid_type = id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
4148 rdma_start_port(id_priv->cma_dev->device)];
4149 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid, gid_type);
4150
4151 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
4152 if (id_priv->id.ps == RDMA_PS_UDP)
4153 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
4154
4155 if (dev_addr->bound_dev_if)
4156 ndev = dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
4157 if (!ndev) {
4158 err = -ENODEV;
4159 goto out2;
4160 }
4161 mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
4162 mc->multicast.ib->rec.hop_limit = 1;
4163 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
4164
4165 if (addr->sa_family == AF_INET) {
4166 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) {
4167 mc->multicast.ib->rec.hop_limit = IPV6_DEFAULT_HOPLIMIT;
4168 if (!send_only) {
4169 err = cma_igmp_send(ndev, &mc->multicast.ib->rec.mgid,
4170 true);
4171 if (!err)
4172 mc->igmp_joined = true;
4173 }
4174 }
4175 } else {
4176 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP)
4177 err = -ENOTSUPP;
4178 }
4179 dev_put(ndev);
4180 if (err || !mc->multicast.ib->rec.mtu) {
4181 if (!err)
4182 err = -EINVAL;
4183 goto out2;
4184 }
4185 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
4186 &mc->multicast.ib->rec.port_gid);
4187 work->id = id_priv;
4188 work->mc = mc;
4189 INIT_WORK(&work->work, iboe_mcast_work_handler);
4190 kref_get(&mc->mcref);
4191 queue_work(cma_wq, &work->work);
4192
4193 return 0;
4194
4195 out2:
4196 kfree(mc->multicast.ib);
4197 out1:
4198 kfree(work);
4199 return err;
4200 }
4201
4202 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
4203 u8 join_state, void *context)
4204 {
4205 struct rdma_id_private *id_priv;
4206 struct cma_multicast *mc;
4207 int ret;
4208
4209 if (!id->device)
4210 return -EINVAL;
4211
4212 id_priv = container_of(id, struct rdma_id_private, id);
4213 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
4214 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
4215 return -EINVAL;
4216
4217 mc = kmalloc(sizeof *mc, GFP_KERNEL);
4218 if (!mc)
4219 return -ENOMEM;
4220
4221 memcpy(&mc->addr, addr, rdma_addr_size(addr));
4222 mc->context = context;
4223 mc->id_priv = id_priv;
4224 mc->igmp_joined = false;
4225 mc->join_state = join_state;
4226 spin_lock(&id_priv->lock);
4227 list_add(&mc->list, &id_priv->mc_list);
4228 spin_unlock(&id_priv->lock);
4229
4230 if (rdma_protocol_roce(id->device, id->port_num)) {
4231 kref_init(&mc->mcref);
4232 ret = cma_iboe_join_multicast(id_priv, mc);
4233 } else if (rdma_cap_ib_mcast(id->device, id->port_num))
4234 ret = cma_join_ib_multicast(id_priv, mc);
4235 else
4236 ret = -ENOSYS;
4237
4238 if (ret) {
4239 spin_lock_irq(&id_priv->lock);
4240 list_del(&mc->list);
4241 spin_unlock_irq(&id_priv->lock);
4242 kfree(mc);
4243 }
4244 return ret;
4245 }
4246 EXPORT_SYMBOL(rdma_join_multicast);
4247
4248 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
4249 {
4250 struct rdma_id_private *id_priv;
4251 struct cma_multicast *mc;
4252
4253 id_priv = container_of(id, struct rdma_id_private, id);
4254 spin_lock_irq(&id_priv->lock);
4255 list_for_each_entry(mc, &id_priv->mc_list, list) {
4256 if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) {
4257 list_del(&mc->list);
4258 spin_unlock_irq(&id_priv->lock);
4259
4260 if (id->qp)
4261 ib_detach_mcast(id->qp,
4262 &mc->multicast.ib->rec.mgid,
4263 be16_to_cpu(mc->multicast.ib->rec.mlid));
4264
4265 BUG_ON(id_priv->cma_dev->device != id->device);
4266
4267 if (rdma_cap_ib_mcast(id->device, id->port_num)) {
4268 ib_sa_free_multicast(mc->multicast.ib);
4269 kfree(mc);
4270 } else if (rdma_protocol_roce(id->device, id->port_num)) {
4271 if (mc->igmp_joined) {
4272 struct rdma_dev_addr *dev_addr =
4273 &id->route.addr.dev_addr;
4274 struct net_device *ndev = NULL;
4275
4276 if (dev_addr->bound_dev_if)
4277 ndev = dev_get_by_index(dev_addr->net,
4278 dev_addr->bound_dev_if);
4279 if (ndev) {
4280 cma_igmp_send(ndev,
4281 &mc->multicast.ib->rec.mgid,
4282 false);
4283 dev_put(ndev);
4284 }
4285 mc->igmp_joined = false;
4286 }
4287 kref_put(&mc->mcref, release_mc);
4288 }
4289 return;
4290 }
4291 }
4292 spin_unlock_irq(&id_priv->lock);
4293 }
4294 EXPORT_SYMBOL(rdma_leave_multicast);
4295
4296 static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
4297 {
4298 struct rdma_dev_addr *dev_addr;
4299 struct cma_ndev_work *work;
4300
4301 dev_addr = &id_priv->id.route.addr.dev_addr;
4302
4303 if ((dev_addr->bound_dev_if == ndev->ifindex) &&
4304 (net_eq(dev_net(ndev), dev_addr->net)) &&
4305 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
4306 pr_info("RDMA CM addr change for ndev %s used by id %p\n",
4307 ndev->name, &id_priv->id);
4308 work = kzalloc(sizeof *work, GFP_KERNEL);
4309 if (!work)
4310 return -ENOMEM;
4311
4312 INIT_WORK(&work->work, cma_ndev_work_handler);
4313 work->id = id_priv;
4314 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
4315 atomic_inc(&id_priv->refcount);
4316 queue_work(cma_wq, &work->work);
4317 }
4318
4319 return 0;
4320 }
4321
4322 static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
4323 void *ptr)
4324 {
4325 struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
4326 struct cma_device *cma_dev;
4327 struct rdma_id_private *id_priv;
4328 int ret = NOTIFY_DONE;
4329
4330 if (event != NETDEV_BONDING_FAILOVER)
4331 return NOTIFY_DONE;
4332
4333 if (!netif_is_bond_master(ndev))
4334 return NOTIFY_DONE;
4335
4336 mutex_lock(&lock);
4337 list_for_each_entry(cma_dev, &dev_list, list)
4338 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
4339 ret = cma_netdev_change(ndev, id_priv);
4340 if (ret)
4341 goto out;
4342 }
4343
4344 out:
4345 mutex_unlock(&lock);
4346 return ret;
4347 }
4348
4349 static struct notifier_block cma_nb = {
4350 .notifier_call = cma_netdev_callback
4351 };
4352
4353 static void cma_add_one(struct ib_device *device)
4354 {
4355 struct cma_device *cma_dev;
4356 struct rdma_id_private *id_priv;
4357 unsigned int i;
4358 unsigned long supported_gids = 0;
4359
4360 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
4361 if (!cma_dev)
4362 return;
4363
4364 cma_dev->device = device;
4365 cma_dev->default_gid_type = kcalloc(device->phys_port_cnt,
4366 sizeof(*cma_dev->default_gid_type),
4367 GFP_KERNEL);
4368 if (!cma_dev->default_gid_type)
4369 goto free_cma_dev;
4370
4371 cma_dev->default_roce_tos = kcalloc(device->phys_port_cnt,
4372 sizeof(*cma_dev->default_roce_tos),
4373 GFP_KERNEL);
4374 if (!cma_dev->default_roce_tos)
4375 goto free_gid_type;
4376
4377 for (i = rdma_start_port(device); i <= rdma_end_port(device); i++) {
4378 supported_gids = roce_gid_type_mask_support(device, i);
4379 WARN_ON(!supported_gids);
4380 if (supported_gids & (1 << CMA_PREFERRED_ROCE_GID_TYPE))
4381 cma_dev->default_gid_type[i - rdma_start_port(device)] =
4382 CMA_PREFERRED_ROCE_GID_TYPE;
4383 else
4384 cma_dev->default_gid_type[i - rdma_start_port(device)] =
4385 find_first_bit(&supported_gids, BITS_PER_LONG);
4386 cma_dev->default_roce_tos[i - rdma_start_port(device)] = 0;
4387 }
4388
4389 init_completion(&cma_dev->comp);
4390 atomic_set(&cma_dev->refcount, 1);
4391 INIT_LIST_HEAD(&cma_dev->id_list);
4392 ib_set_client_data(device, &cma_client, cma_dev);
4393
4394 mutex_lock(&lock);
4395 list_add_tail(&cma_dev->list, &dev_list);
4396 list_for_each_entry(id_priv, &listen_any_list, list)
4397 cma_listen_on_dev(id_priv, cma_dev);
4398 mutex_unlock(&lock);
4399
4400 return;
4401
4402 free_gid_type:
4403 kfree(cma_dev->default_gid_type);
4404
4405 free_cma_dev:
4406 kfree(cma_dev);
4407
4408 return;
4409 }
4410
4411 static int cma_remove_id_dev(struct rdma_id_private *id_priv)
4412 {
4413 struct rdma_cm_event event;
4414 enum rdma_cm_state state;
4415 int ret = 0;
4416
4417 /* Record that we want to remove the device */
4418 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
4419 if (state == RDMA_CM_DESTROYING)
4420 return 0;
4421
4422 cma_cancel_operation(id_priv, state);
4423 mutex_lock(&id_priv->handler_mutex);
4424
4425 /* Check for destruction from another callback. */
4426 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
4427 goto out;
4428
4429 memset(&event, 0, sizeof event);
4430 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
4431 ret = id_priv->id.event_handler(&id_priv->id, &event);
4432 out:
4433 mutex_unlock(&id_priv->handler_mutex);
4434 return ret;
4435 }
4436
4437 static void cma_process_remove(struct cma_device *cma_dev)
4438 {
4439 struct rdma_id_private *id_priv;
4440 int ret;
4441
4442 mutex_lock(&lock);
4443 while (!list_empty(&cma_dev->id_list)) {
4444 id_priv = list_entry(cma_dev->id_list.next,
4445 struct rdma_id_private, list);
4446
4447 list_del(&id_priv->listen_list);
4448 list_del_init(&id_priv->list);
4449 atomic_inc(&id_priv->refcount);
4450 mutex_unlock(&lock);
4451
4452 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
4453 cma_deref_id(id_priv);
4454 if (ret)
4455 rdma_destroy_id(&id_priv->id);
4456
4457 mutex_lock(&lock);
4458 }
4459 mutex_unlock(&lock);
4460
4461 cma_deref_dev(cma_dev);
4462 wait_for_completion(&cma_dev->comp);
4463 }
4464
4465 static void cma_remove_one(struct ib_device *device, void *client_data)
4466 {
4467 struct cma_device *cma_dev = client_data;
4468
4469 if (!cma_dev)
4470 return;
4471
4472 mutex_lock(&lock);
4473 list_del(&cma_dev->list);
4474 mutex_unlock(&lock);
4475
4476 cma_process_remove(cma_dev);
4477 kfree(cma_dev->default_roce_tos);
4478 kfree(cma_dev->default_gid_type);
4479 kfree(cma_dev);
4480 }
4481
4482 static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb)
4483 {
4484 struct nlmsghdr *nlh;
4485 struct rdma_cm_id_stats *id_stats;
4486 struct rdma_id_private *id_priv;
4487 struct rdma_cm_id *id = NULL;
4488 struct cma_device *cma_dev;
4489 int i_dev = 0, i_id = 0;
4490
4491 /*
4492 * We export all of the IDs as a sequence of messages. Each
4493 * ID gets its own netlink message.
4494 */
4495 mutex_lock(&lock);
4496
4497 list_for_each_entry(cma_dev, &dev_list, list) {
4498 if (i_dev < cb->args[0]) {
4499 i_dev++;
4500 continue;
4501 }
4502
4503 i_id = 0;
4504 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
4505 if (i_id < cb->args[1]) {
4506 i_id++;
4507 continue;
4508 }
4509
4510 id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq,
4511 sizeof *id_stats, RDMA_NL_RDMA_CM,
4512 RDMA_NL_RDMA_CM_ID_STATS,
4513 NLM_F_MULTI);
4514 if (!id_stats)
4515 goto out;
4516
4517 memset(id_stats, 0, sizeof *id_stats);
4518 id = &id_priv->id;
4519 id_stats->node_type = id->route.addr.dev_addr.dev_type;
4520 id_stats->port_num = id->port_num;
4521 id_stats->bound_dev_if =
4522 id->route.addr.dev_addr.bound_dev_if;
4523
4524 if (ibnl_put_attr(skb, nlh,
4525 rdma_addr_size(cma_src_addr(id_priv)),
4526 cma_src_addr(id_priv),
4527 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR))
4528 goto out;
4529 if (ibnl_put_attr(skb, nlh,
4530 rdma_addr_size(cma_dst_addr(id_priv)),
4531 cma_dst_addr(id_priv),
4532 RDMA_NL_RDMA_CM_ATTR_DST_ADDR))
4533 goto out;
4534
4535 id_stats->pid = task_pid_vnr(id_priv->res.task);
4536 id_stats->port_space = id->ps;
4537 id_stats->cm_state = id_priv->state;
4538 id_stats->qp_num = id_priv->qp_num;
4539 id_stats->qp_type = id->qp_type;
4540
4541 i_id++;
4542 nlmsg_end(skb, nlh);
4543 }
4544
4545 cb->args[1] = 0;
4546 i_dev++;
4547 }
4548
4549 out:
4550 mutex_unlock(&lock);
4551 cb->args[0] = i_dev;
4552 cb->args[1] = i_id;
4553
4554 return skb->len;
4555 }
4556
4557 static const struct rdma_nl_cbs cma_cb_table[RDMA_NL_RDMA_CM_NUM_OPS] = {
4558 [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats},
4559 };
4560
4561 static int cma_init_net(struct net *net)
4562 {
4563 struct cma_pernet *pernet = cma_pernet(net);
4564
4565 idr_init(&pernet->tcp_ps);
4566 idr_init(&pernet->udp_ps);
4567 idr_init(&pernet->ipoib_ps);
4568 idr_init(&pernet->ib_ps);
4569
4570 return 0;
4571 }
4572
4573 static void cma_exit_net(struct net *net)
4574 {
4575 struct cma_pernet *pernet = cma_pernet(net);
4576
4577 idr_destroy(&pernet->tcp_ps);
4578 idr_destroy(&pernet->udp_ps);
4579 idr_destroy(&pernet->ipoib_ps);
4580 idr_destroy(&pernet->ib_ps);
4581 }
4582
4583 static struct pernet_operations cma_pernet_operations = {
4584 .init = cma_init_net,
4585 .exit = cma_exit_net,
4586 .id = &cma_pernet_id,
4587 .size = sizeof(struct cma_pernet),
4588 };
4589
4590 static int __init cma_init(void)
4591 {
4592 int ret;
4593
4594 cma_wq = alloc_ordered_workqueue("rdma_cm", WQ_MEM_RECLAIM);
4595 if (!cma_wq)
4596 return -ENOMEM;
4597
4598 ret = register_pernet_subsys(&cma_pernet_operations);
4599 if (ret)
4600 goto err_wq;
4601
4602 ib_sa_register_client(&sa_client);
4603 register_netdevice_notifier(&cma_nb);
4604
4605 ret = ib_register_client(&cma_client);
4606 if (ret)
4607 goto err;
4608
4609 rdma_nl_register(RDMA_NL_RDMA_CM, cma_cb_table);
4610 cma_configfs_init();
4611
4612 return 0;
4613
4614 err:
4615 unregister_netdevice_notifier(&cma_nb);
4616 ib_sa_unregister_client(&sa_client);
4617 err_wq:
4618 destroy_workqueue(cma_wq);
4619 return ret;
4620 }
4621
4622 static void __exit cma_cleanup(void)
4623 {
4624 cma_configfs_exit();
4625 rdma_nl_unregister(RDMA_NL_RDMA_CM);
4626 ib_unregister_client(&cma_client);
4627 unregister_netdevice_notifier(&cma_nb);
4628 ib_sa_unregister_client(&sa_client);
4629 unregister_pernet_subsys(&cma_pernet_operations);
4630 destroy_workqueue(cma_wq);
4631 }
4632
4633 MODULE_ALIAS_RDMA_NETLINK(RDMA_NL_RDMA_CM, 1);
4634
4635 module_init(cma_init);
4636 module_exit(cma_cleanup);
Linux with added FPC-III support