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powerpc/mm/4k: don't allocate larger pmd page table for 4k
[linux/fpc-iii.git] / drivers / infiniband / core / cma.c
blobe7dcfac877ca2eb7b86601a9115b4c2fc27f4c01
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
66 MODULE_AUTHOR("Sean Hefty");
67 MODULE_DESCRIPTION("Generic RDMA CM Agent");
68 MODULE_LICENSE("Dual BSD/GPL");
69
70 #define CMA_CM_RESPONSE_TIMEOUT 20
71 #define CMA_QUERY_CLASSPORT_INFO_TIMEOUT 3000
72 #define CMA_MAX_CM_RETRIES 15
73 #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
74 #define CMA_IBOE_PACKET_LIFETIME 18
75
76 static const char * const cma_events[] = {
77 [RDMA_CM_EVENT_ADDR_RESOLVED] = "address resolved",
78 [RDMA_CM_EVENT_ADDR_ERROR] = "address error",
79 [RDMA_CM_EVENT_ROUTE_RESOLVED] = "route resolved ",
80 [RDMA_CM_EVENT_ROUTE_ERROR] = "route error",
81 [RDMA_CM_EVENT_CONNECT_REQUEST] = "connect request",
82 [RDMA_CM_EVENT_CONNECT_RESPONSE] = "connect response",
83 [RDMA_CM_EVENT_CONNECT_ERROR] = "connect error",
84 [RDMA_CM_EVENT_UNREACHABLE] = "unreachable",
85 [RDMA_CM_EVENT_REJECTED] = "rejected",
86 [RDMA_CM_EVENT_ESTABLISHED] = "established",
87 [RDMA_CM_EVENT_DISCONNECTED] = "disconnected",
88 [RDMA_CM_EVENT_DEVICE_REMOVAL] = "device removal",
89 [RDMA_CM_EVENT_MULTICAST_JOIN] = "multicast join",
90 [RDMA_CM_EVENT_MULTICAST_ERROR] = "multicast error",
91 [RDMA_CM_EVENT_ADDR_CHANGE] = "address change",
92 [RDMA_CM_EVENT_TIMEWAIT_EXIT] = "timewait exit",
93 };
94
95 const char *__attribute_const__ rdma_event_msg(enum rdma_cm_event_type event)
96 {
97 size_t index = event;
98
99 return (index < ARRAY_SIZE(cma_events) && cma_events[index]) ?
100 cma_events[index] : "unrecognized event";
101 }
102 EXPORT_SYMBOL(rdma_event_msg);
103
104 const char *__attribute_const__ rdma_reject_msg(struct rdma_cm_id *id,
105 int reason)
106 {
107 if (rdma_ib_or_roce(id->device, id->port_num))
108 return ibcm_reject_msg(reason);
109
110 if (rdma_protocol_iwarp(id->device, id->port_num))
111 return iwcm_reject_msg(reason);
112
113 WARN_ON_ONCE(1);
114 return "unrecognized transport";
115 }
116 EXPORT_SYMBOL(rdma_reject_msg);
117
118 bool rdma_is_consumer_reject(struct rdma_cm_id *id, int reason)
119 {
120 if (rdma_ib_or_roce(id->device, id->port_num))
121 return reason == IB_CM_REJ_CONSUMER_DEFINED;
122
123 if (rdma_protocol_iwarp(id->device, id->port_num))
124 return reason == -ECONNREFUSED;
125
126 WARN_ON_ONCE(1);
127 return false;
128 }
129 EXPORT_SYMBOL(rdma_is_consumer_reject);
130
131 const void *rdma_consumer_reject_data(struct rdma_cm_id *id,
132 struct rdma_cm_event *ev, u8 *data_len)
133 {
134 const void *p;
135
136 if (rdma_is_consumer_reject(id, ev->status)) {
137 *data_len = ev->param.conn.private_data_len;
138 p = ev->param.conn.private_data;
139 } else {
140 *data_len = 0;
141 p = NULL;
142 }
143 return p;
144 }
145 EXPORT_SYMBOL(rdma_consumer_reject_data);
146
147 static void cma_add_one(struct ib_device *device);
148 static void cma_remove_one(struct ib_device *device, void *client_data);
149
150 static struct ib_client cma_client = {
151 .name = "cma",
152 .add = cma_add_one,
153 .remove = cma_remove_one
154 };
155
156 static struct ib_sa_client sa_client;
157 static struct rdma_addr_client addr_client;
158 static LIST_HEAD(dev_list);
159 static LIST_HEAD(listen_any_list);
160 static DEFINE_MUTEX(lock);
161 static struct workqueue_struct *cma_wq;
162 static unsigned int cma_pernet_id;
163
164 struct cma_pernet {
165 struct idr tcp_ps;
166 struct idr udp_ps;
167 struct idr ipoib_ps;
168 struct idr ib_ps;
169 };
170
171 static struct cma_pernet *cma_pernet(struct net *net)
172 {
173 return net_generic(net, cma_pernet_id);
174 }
175
176 static struct idr *cma_pernet_idr(struct net *net, enum rdma_port_space ps)
177 {
178 struct cma_pernet *pernet = cma_pernet(net);
179
180 switch (ps) {
181 case RDMA_PS_TCP:
182 return &pernet->tcp_ps;
183 case RDMA_PS_UDP:
184 return &pernet->udp_ps;
185 case RDMA_PS_IPOIB:
186 return &pernet->ipoib_ps;
187 case RDMA_PS_IB:
188 return &pernet->ib_ps;
189 default:
190 return NULL;
191 }
192 }
193
194 struct cma_device {
195 struct list_head list;
196 struct ib_device *device;
197 struct completion comp;
198 atomic_t refcount;
199 struct list_head id_list;
200 enum ib_gid_type *default_gid_type;
201 };
202
203 struct rdma_bind_list {
204 enum rdma_port_space ps;
205 struct hlist_head owners;
206 unsigned short port;
207 };
208
209 struct class_port_info_context {
210 struct ib_class_port_info *class_port_info;
211 struct ib_device *device;
212 struct completion done;
213 struct ib_sa_query *sa_query;
214 u8 port_num;
215 };
216
217 static int cma_ps_alloc(struct net *net, enum rdma_port_space ps,
218 struct rdma_bind_list *bind_list, int snum)
219 {
220 struct idr *idr = cma_pernet_idr(net, ps);
221
222 return idr_alloc(idr, bind_list, snum, snum + 1, GFP_KERNEL);
223 }
224
225 static struct rdma_bind_list *cma_ps_find(struct net *net,
226 enum rdma_port_space ps, int snum)
227 {
228 struct idr *idr = cma_pernet_idr(net, ps);
229
230 return idr_find(idr, snum);
231 }
232
233 static void cma_ps_remove(struct net *net, enum rdma_port_space ps, int snum)
234 {
235 struct idr *idr = cma_pernet_idr(net, ps);
236
237 idr_remove(idr, snum);
238 }
239
240 enum {
241 CMA_OPTION_AFONLY,
242 };
243
244 void cma_ref_dev(struct cma_device *cma_dev)
245 {
246 atomic_inc(&cma_dev->refcount);
247 }
248
249 struct cma_device *cma_enum_devices_by_ibdev(cma_device_filter filter,
250 void *cookie)
251 {
252 struct cma_device *cma_dev;
253 struct cma_device *found_cma_dev = NULL;
254
255 mutex_lock(&lock);
256
257 list_for_each_entry(cma_dev, &dev_list, list)
258 if (filter(cma_dev->device, cookie)) {
259 found_cma_dev = cma_dev;
260 break;
261 }
262
263 if (found_cma_dev)
264 cma_ref_dev(found_cma_dev);
265 mutex_unlock(&lock);
266 return found_cma_dev;
267 }
268
269 int cma_get_default_gid_type(struct cma_device *cma_dev,
270 unsigned int port)
271 {
272 if (port < rdma_start_port(cma_dev->device) ||
273 port > rdma_end_port(cma_dev->device))
274 return -EINVAL;
275
276 return cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)];
277 }
278
279 int cma_set_default_gid_type(struct cma_device *cma_dev,
280 unsigned int port,
281 enum ib_gid_type default_gid_type)
282 {
283 unsigned long supported_gids;
284
285 if (port < rdma_start_port(cma_dev->device) ||
286 port > rdma_end_port(cma_dev->device))
287 return -EINVAL;
288
289 supported_gids = roce_gid_type_mask_support(cma_dev->device, port);
290
291 if (!(supported_gids & 1 << default_gid_type))
292 return -EINVAL;
293
294 cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)] =
295 default_gid_type;
296
297 return 0;
298 }
299
300 struct ib_device *cma_get_ib_dev(struct cma_device *cma_dev)
301 {
302 return cma_dev->device;
303 }
304
305 /*
306 * Device removal can occur at anytime, so we need extra handling to
307 * serialize notifying the user of device removal with other callbacks.
308 * We do this by disabling removal notification while a callback is in process,
309 * and reporting it after the callback completes.
310 */
311 struct rdma_id_private {
312 struct rdma_cm_id id;
313
314 struct rdma_bind_list *bind_list;
315 struct hlist_node node;
316 struct list_head list; /* listen_any_list or cma_device.list */
317 struct list_head listen_list; /* per device listens */
318 struct cma_device *cma_dev;
319 struct list_head mc_list;
320
321 int internal_id;
322 enum rdma_cm_state state;
323 spinlock_t lock;
324 struct mutex qp_mutex;
325
326 struct completion comp;
327 atomic_t refcount;
328 struct mutex handler_mutex;
329
330 int backlog;
331 int timeout_ms;
332 struct ib_sa_query *query;
333 int query_id;
334 union {
335 struct ib_cm_id *ib;
336 struct iw_cm_id *iw;
337 } cm_id;
338
339 u32 seq_num;
340 u32 qkey;
341 u32 qp_num;
342 pid_t owner;
343 u32 options;
344 u8 srq;
345 u8 tos;
346 u8 reuseaddr;
347 u8 afonly;
348 enum ib_gid_type gid_type;
349 };
350
351 struct cma_multicast {
352 struct rdma_id_private *id_priv;
353 union {
354 struct ib_sa_multicast *ib;
355 } multicast;
356 struct list_head list;
357 void *context;
358 struct sockaddr_storage addr;
359 struct kref mcref;
360 bool igmp_joined;
361 u8 join_state;
362 };
363
364 struct cma_work {
365 struct work_struct work;
366 struct rdma_id_private *id;
367 enum rdma_cm_state old_state;
368 enum rdma_cm_state new_state;
369 struct rdma_cm_event event;
370 };
371
372 struct cma_ndev_work {
373 struct work_struct work;
374 struct rdma_id_private *id;
375 struct rdma_cm_event event;
376 };
377
378 struct iboe_mcast_work {
379 struct work_struct work;
380 struct rdma_id_private *id;
381 struct cma_multicast *mc;
382 };
383
384 union cma_ip_addr {
385 struct in6_addr ip6;
386 struct {
387 __be32 pad[3];
388 __be32 addr;
389 } ip4;
390 };
391
392 struct cma_hdr {
393 u8 cma_version;
394 u8 ip_version; /* IP version: 7:4 */
395 __be16 port;
396 union cma_ip_addr src_addr;
397 union cma_ip_addr dst_addr;
398 };
399
400 #define CMA_VERSION 0x00
401
402 struct cma_req_info {
403 struct ib_device *device;
404 int port;
405 union ib_gid local_gid;
406 __be64 service_id;
407 u16 pkey;
408 bool has_gid:1;
409 };
410
411 static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp)
412 {
413 unsigned long flags;
414 int ret;
415
416 spin_lock_irqsave(&id_priv->lock, flags);
417 ret = (id_priv->state == comp);
418 spin_unlock_irqrestore(&id_priv->lock, flags);
419 return ret;
420 }
421
422 static int cma_comp_exch(struct rdma_id_private *id_priv,
423 enum rdma_cm_state comp, enum rdma_cm_state exch)
424 {
425 unsigned long flags;
426 int ret;
427
428 spin_lock_irqsave(&id_priv->lock, flags);
429 if ((ret = (id_priv->state == comp)))
430 id_priv->state = exch;
431 spin_unlock_irqrestore(&id_priv->lock, flags);
432 return ret;
433 }
434
435 static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv,
436 enum rdma_cm_state exch)
437 {
438 unsigned long flags;
439 enum rdma_cm_state old;
440
441 spin_lock_irqsave(&id_priv->lock, flags);
442 old = id_priv->state;
443 id_priv->state = exch;
444 spin_unlock_irqrestore(&id_priv->lock, flags);
445 return old;
446 }
447
448 static inline u8 cma_get_ip_ver(const struct cma_hdr *hdr)
449 {
450 return hdr->ip_version >> 4;
451 }
452
453 static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
454 {
455 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
456 }
457
458 static int cma_igmp_send(struct net_device *ndev, union ib_gid *mgid, bool join)
459 {
460 struct in_device *in_dev = NULL;
461
462 if (ndev) {
463 rtnl_lock();
464 in_dev = __in_dev_get_rtnl(ndev);
465 if (in_dev) {
466 if (join)
467 ip_mc_inc_group(in_dev,
468 *(__be32 *)(mgid->raw + 12));
469 else
470 ip_mc_dec_group(in_dev,
471 *(__be32 *)(mgid->raw + 12));
472 }
473 rtnl_unlock();
474 }
475 return (in_dev) ? 0 : -ENODEV;
476 }
477
478 static void _cma_attach_to_dev(struct rdma_id_private *id_priv,
479 struct cma_device *cma_dev)
480 {
481 cma_ref_dev(cma_dev);
482 id_priv->cma_dev = cma_dev;
483 id_priv->gid_type = 0;
484 id_priv->id.device = cma_dev->device;
485 id_priv->id.route.addr.dev_addr.transport =
486 rdma_node_get_transport(cma_dev->device->node_type);
487 list_add_tail(&id_priv->list, &cma_dev->id_list);
488 }
489
490 static void cma_attach_to_dev(struct rdma_id_private *id_priv,
491 struct cma_device *cma_dev)
492 {
493 _cma_attach_to_dev(id_priv, cma_dev);
494 id_priv->gid_type =
495 cma_dev->default_gid_type[id_priv->id.port_num -
496 rdma_start_port(cma_dev->device)];
497 }
498
499 void cma_deref_dev(struct cma_device *cma_dev)
500 {
501 if (atomic_dec_and_test(&cma_dev->refcount))
502 complete(&cma_dev->comp);
503 }
504
505 static inline void release_mc(struct kref *kref)
506 {
507 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
508
509 kfree(mc->multicast.ib);
510 kfree(mc);
511 }
512
513 static void cma_release_dev(struct rdma_id_private *id_priv)
514 {
515 mutex_lock(&lock);
516 list_del(&id_priv->list);
517 cma_deref_dev(id_priv->cma_dev);
518 id_priv->cma_dev = NULL;
519 mutex_unlock(&lock);
520 }
521
522 static inline struct sockaddr *cma_src_addr(struct rdma_id_private *id_priv)
523 {
524 return (struct sockaddr *) &id_priv->id.route.addr.src_addr;
525 }
526
527 static inline struct sockaddr *cma_dst_addr(struct rdma_id_private *id_priv)
528 {
529 return (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
530 }
531
532 static inline unsigned short cma_family(struct rdma_id_private *id_priv)
533 {
534 return id_priv->id.route.addr.src_addr.ss_family;
535 }
536
537 static int cma_set_qkey(struct rdma_id_private *id_priv, u32 qkey)
538 {
539 struct ib_sa_mcmember_rec rec;
540 int ret = 0;
541
542 if (id_priv->qkey) {
543 if (qkey && id_priv->qkey != qkey)
544 return -EINVAL;
545 return 0;
546 }
547
548 if (qkey) {
549 id_priv->qkey = qkey;
550 return 0;
551 }
552
553 switch (id_priv->id.ps) {
554 case RDMA_PS_UDP:
555 case RDMA_PS_IB:
556 id_priv->qkey = RDMA_UDP_QKEY;
557 break;
558 case RDMA_PS_IPOIB:
559 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
560 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
561 id_priv->id.port_num, &rec.mgid,
562 &rec);
563 if (!ret)
564 id_priv->qkey = be32_to_cpu(rec.qkey);
565 break;
566 default:
567 break;
568 }
569 return ret;
570 }
571
572 static void cma_translate_ib(struct sockaddr_ib *sib, struct rdma_dev_addr *dev_addr)
573 {
574 dev_addr->dev_type = ARPHRD_INFINIBAND;
575 rdma_addr_set_sgid(dev_addr, (union ib_gid *) &sib->sib_addr);
576 ib_addr_set_pkey(dev_addr, ntohs(sib->sib_pkey));
577 }
578
579 static int cma_translate_addr(struct sockaddr *addr, struct rdma_dev_addr *dev_addr)
580 {
581 int ret;
582
583 if (addr->sa_family != AF_IB) {
584 ret = rdma_translate_ip(addr, dev_addr, NULL);
585 } else {
586 cma_translate_ib((struct sockaddr_ib *) addr, dev_addr);
587 ret = 0;
588 }
589
590 return ret;
591 }
592
593 static inline int cma_validate_port(struct ib_device *device, u8 port,
594 enum ib_gid_type gid_type,
595 union ib_gid *gid, int dev_type,
596 int bound_if_index)
597 {
598 int ret = -ENODEV;
599 struct net_device *ndev = NULL;
600
601 if ((dev_type == ARPHRD_INFINIBAND) && !rdma_protocol_ib(device, port))
602 return ret;
603
604 if ((dev_type != ARPHRD_INFINIBAND) && rdma_protocol_ib(device, port))
605 return ret;
606
607 if (dev_type == ARPHRD_ETHER && rdma_protocol_roce(device, port)) {
608 ndev = dev_get_by_index(&init_net, bound_if_index);
609 if (ndev && ndev->flags & IFF_LOOPBACK) {
610 pr_info("detected loopback device\n");
611 dev_put(ndev);
612
613 if (!device->get_netdev)
614 return -EOPNOTSUPP;
615
616 ndev = device->get_netdev(device, port);
617 if (!ndev)
618 return -ENODEV;
619 }
620 } else {
621 gid_type = IB_GID_TYPE_IB;
622 }
623
624 ret = ib_find_cached_gid_by_port(device, gid, gid_type, port,
625 ndev, NULL);
626
627 if (ndev)
628 dev_put(ndev);
629
630 return ret;
631 }
632
633 static int cma_acquire_dev(struct rdma_id_private *id_priv,
634 struct rdma_id_private *listen_id_priv)
635 {
636 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
637 struct cma_device *cma_dev;
638 union ib_gid gid, iboe_gid, *gidp;
639 int ret = -ENODEV;
640 u8 port;
641
642 if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
643 id_priv->id.ps == RDMA_PS_IPOIB)
644 return -EINVAL;
645
646 mutex_lock(&lock);
647 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
648 &iboe_gid);
649
650 memcpy(&gid, dev_addr->src_dev_addr +
651 rdma_addr_gid_offset(dev_addr), sizeof gid);
652
653 if (listen_id_priv) {
654 cma_dev = listen_id_priv->cma_dev;
655 port = listen_id_priv->id.port_num;
656 gidp = rdma_protocol_roce(cma_dev->device, port) ?
657 &iboe_gid : &gid;
658
659 ret = cma_validate_port(cma_dev->device, port,
660 rdma_protocol_ib(cma_dev->device, port) ?
661 IB_GID_TYPE_IB :
662 listen_id_priv->gid_type, gidp,
663 dev_addr->dev_type,
664 dev_addr->bound_dev_if);
665 if (!ret) {
666 id_priv->id.port_num = port;
667 goto out;
668 }
669 }
670
671 list_for_each_entry(cma_dev, &dev_list, list) {
672 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
673 if (listen_id_priv &&
674 listen_id_priv->cma_dev == cma_dev &&
675 listen_id_priv->id.port_num == port)
676 continue;
677
678 gidp = rdma_protocol_roce(cma_dev->device, port) ?
679 &iboe_gid : &gid;
680
681 ret = cma_validate_port(cma_dev->device, port,
682 rdma_protocol_ib(cma_dev->device, port) ?
683 IB_GID_TYPE_IB :
684 cma_dev->default_gid_type[port - 1],
685 gidp, dev_addr->dev_type,
686 dev_addr->bound_dev_if);
687 if (!ret) {
688 id_priv->id.port_num = port;
689 goto out;
690 }
691 }
692 }
693
694 out:
695 if (!ret)
696 cma_attach_to_dev(id_priv, cma_dev);
697
698 mutex_unlock(&lock);
699 return ret;
700 }
701
702 /*
703 * Select the source IB device and address to reach the destination IB address.
704 */
705 static int cma_resolve_ib_dev(struct rdma_id_private *id_priv)
706 {
707 struct cma_device *cma_dev, *cur_dev;
708 struct sockaddr_ib *addr;
709 union ib_gid gid, sgid, *dgid;
710 u16 pkey, index;
711 u8 p;
712 int i;
713
714 cma_dev = NULL;
715 addr = (struct sockaddr_ib *) cma_dst_addr(id_priv);
716 dgid = (union ib_gid *) &addr->sib_addr;
717 pkey = ntohs(addr->sib_pkey);
718
719 list_for_each_entry(cur_dev, &dev_list, list) {
720 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
721 if (!rdma_cap_af_ib(cur_dev->device, p))
722 continue;
723
724 if (ib_find_cached_pkey(cur_dev->device, p, pkey, &index))
725 continue;
726
727 for (i = 0; !ib_get_cached_gid(cur_dev->device, p, i,
728 &gid, NULL);
729 i++) {
730 if (!memcmp(&gid, dgid, sizeof(gid))) {
731 cma_dev = cur_dev;
732 sgid = gid;
733 id_priv->id.port_num = p;
734 goto found;
735 }
736
737 if (!cma_dev && (gid.global.subnet_prefix ==
738 dgid->global.subnet_prefix)) {
739 cma_dev = cur_dev;
740 sgid = gid;
741 id_priv->id.port_num = p;
742 }
743 }
744 }
745 }
746
747 if (!cma_dev)
748 return -ENODEV;
749
750 found:
751 cma_attach_to_dev(id_priv, cma_dev);
752 addr = (struct sockaddr_ib *) cma_src_addr(id_priv);
753 memcpy(&addr->sib_addr, &sgid, sizeof sgid);
754 cma_translate_ib(addr, &id_priv->id.route.addr.dev_addr);
755 return 0;
756 }
757
758 static void cma_deref_id(struct rdma_id_private *id_priv)
759 {
760 if (atomic_dec_and_test(&id_priv->refcount))
761 complete(&id_priv->comp);
762 }
763
764 struct rdma_cm_id *rdma_create_id(struct net *net,
765 rdma_cm_event_handler event_handler,
766 void *context, enum rdma_port_space ps,
767 enum ib_qp_type qp_type)
768 {
769 struct rdma_id_private *id_priv;
770
771 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
772 if (!id_priv)
773 return ERR_PTR(-ENOMEM);
774
775 id_priv->owner = task_pid_nr(current);
776 id_priv->state = RDMA_CM_IDLE;
777 id_priv->id.context = context;
778 id_priv->id.event_handler = event_handler;
779 id_priv->id.ps = ps;
780 id_priv->id.qp_type = qp_type;
781 spin_lock_init(&id_priv->lock);
782 mutex_init(&id_priv->qp_mutex);
783 init_completion(&id_priv->comp);
784 atomic_set(&id_priv->refcount, 1);
785 mutex_init(&id_priv->handler_mutex);
786 INIT_LIST_HEAD(&id_priv->listen_list);
787 INIT_LIST_HEAD(&id_priv->mc_list);
788 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
789 id_priv->id.route.addr.dev_addr.net = get_net(net);
790
791 return &id_priv->id;
792 }
793 EXPORT_SYMBOL(rdma_create_id);
794
795 static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
796 {
797 struct ib_qp_attr qp_attr;
798 int qp_attr_mask, ret;
799
800 qp_attr.qp_state = IB_QPS_INIT;
801 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
802 if (ret)
803 return ret;
804
805 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
806 if (ret)
807 return ret;
808
809 qp_attr.qp_state = IB_QPS_RTR;
810 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
811 if (ret)
812 return ret;
813
814 qp_attr.qp_state = IB_QPS_RTS;
815 qp_attr.sq_psn = 0;
816 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
817
818 return ret;
819 }
820
821 static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
822 {
823 struct ib_qp_attr qp_attr;
824 int qp_attr_mask, ret;
825
826 qp_attr.qp_state = IB_QPS_INIT;
827 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
828 if (ret)
829 return ret;
830
831 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
832 }
833
834 int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
835 struct ib_qp_init_attr *qp_init_attr)
836 {
837 struct rdma_id_private *id_priv;
838 struct ib_qp *qp;
839 int ret;
840
841 id_priv = container_of(id, struct rdma_id_private, id);
842 if (id->device != pd->device)
843 return -EINVAL;
844
845 qp_init_attr->port_num = id->port_num;
846 qp = ib_create_qp(pd, qp_init_attr);
847 if (IS_ERR(qp))
848 return PTR_ERR(qp);
849
850 if (id->qp_type == IB_QPT_UD)
851 ret = cma_init_ud_qp(id_priv, qp);
852 else
853 ret = cma_init_conn_qp(id_priv, qp);
854 if (ret)
855 goto err;
856
857 id->qp = qp;
858 id_priv->qp_num = qp->qp_num;
859 id_priv->srq = (qp->srq != NULL);
860 return 0;
861 err:
862 ib_destroy_qp(qp);
863 return ret;
864 }
865 EXPORT_SYMBOL(rdma_create_qp);
866
867 void rdma_destroy_qp(struct rdma_cm_id *id)
868 {
869 struct rdma_id_private *id_priv;
870
871 id_priv = container_of(id, struct rdma_id_private, id);
872 mutex_lock(&id_priv->qp_mutex);
873 ib_destroy_qp(id_priv->id.qp);
874 id_priv->id.qp = NULL;
875 mutex_unlock(&id_priv->qp_mutex);
876 }
877 EXPORT_SYMBOL(rdma_destroy_qp);
878
879 static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
880 struct rdma_conn_param *conn_param)
881 {
882 struct ib_qp_attr qp_attr;
883 int qp_attr_mask, ret;
884 union ib_gid sgid;
885
886 mutex_lock(&id_priv->qp_mutex);
887 if (!id_priv->id.qp) {
888 ret = 0;
889 goto out;
890 }
891
892 /* Need to update QP attributes from default values. */
893 qp_attr.qp_state = IB_QPS_INIT;
894 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
895 if (ret)
896 goto out;
897
898 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
899 if (ret)
900 goto out;
901
902 qp_attr.qp_state = IB_QPS_RTR;
903 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
904 if (ret)
905 goto out;
906
907 ret = ib_query_gid(id_priv->id.device, id_priv->id.port_num,
908 qp_attr.ah_attr.grh.sgid_index, &sgid, NULL);
909 if (ret)
910 goto out;
911
912 BUG_ON(id_priv->cma_dev->device != id_priv->id.device);
913
914 if (conn_param)
915 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
916 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
917 out:
918 mutex_unlock(&id_priv->qp_mutex);
919 return ret;
920 }
921
922 static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
923 struct rdma_conn_param *conn_param)
924 {
925 struct ib_qp_attr qp_attr;
926 int qp_attr_mask, ret;
927
928 mutex_lock(&id_priv->qp_mutex);
929 if (!id_priv->id.qp) {
930 ret = 0;
931 goto out;
932 }
933
934 qp_attr.qp_state = IB_QPS_RTS;
935 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
936 if (ret)
937 goto out;
938
939 if (conn_param)
940 qp_attr.max_rd_atomic = conn_param->initiator_depth;
941 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
942 out:
943 mutex_unlock(&id_priv->qp_mutex);
944 return ret;
945 }
946
947 static int cma_modify_qp_err(struct rdma_id_private *id_priv)
948 {
949 struct ib_qp_attr qp_attr;
950 int ret;
951
952 mutex_lock(&id_priv->qp_mutex);
953 if (!id_priv->id.qp) {
954 ret = 0;
955 goto out;
956 }
957
958 qp_attr.qp_state = IB_QPS_ERR;
959 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
960 out:
961 mutex_unlock(&id_priv->qp_mutex);
962 return ret;
963 }
964
965 static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
966 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
967 {
968 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
969 int ret;
970 u16 pkey;
971
972 if (rdma_cap_eth_ah(id_priv->id.device, id_priv->id.port_num))
973 pkey = 0xffff;
974 else
975 pkey = ib_addr_get_pkey(dev_addr);
976
977 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
978 pkey, &qp_attr->pkey_index);
979 if (ret)
980 return ret;
981
982 qp_attr->port_num = id_priv->id.port_num;
983 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
984
985 if (id_priv->id.qp_type == IB_QPT_UD) {
986 ret = cma_set_qkey(id_priv, 0);
987 if (ret)
988 return ret;
989
990 qp_attr->qkey = id_priv->qkey;
991 *qp_attr_mask |= IB_QP_QKEY;
992 } else {
993 qp_attr->qp_access_flags = 0;
994 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
995 }
996 return 0;
997 }
998
999 int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
1000 int *qp_attr_mask)
1001 {
1002 struct rdma_id_private *id_priv;
1003 int ret = 0;
1004
1005 id_priv = container_of(id, struct rdma_id_private, id);
1006 if (rdma_cap_ib_cm(id->device, id->port_num)) {
1007 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
1008 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
1009 else
1010 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
1011 qp_attr_mask);
1012
1013 if (qp_attr->qp_state == IB_QPS_RTR)
1014 qp_attr->rq_psn = id_priv->seq_num;
1015 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
1016 if (!id_priv->cm_id.iw) {
1017 qp_attr->qp_access_flags = 0;
1018 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
1019 } else
1020 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
1021 qp_attr_mask);
1022 } else
1023 ret = -ENOSYS;
1024
1025 return ret;
1026 }
1027 EXPORT_SYMBOL(rdma_init_qp_attr);
1028
1029 static inline int cma_zero_addr(struct sockaddr *addr)
1030 {
1031 switch (addr->sa_family) {
1032 case AF_INET:
1033 return ipv4_is_zeronet(((struct sockaddr_in *)addr)->sin_addr.s_addr);
1034 case AF_INET6:
1035 return ipv6_addr_any(&((struct sockaddr_in6 *) addr)->sin6_addr);
1036 case AF_IB:
1037 return ib_addr_any(&((struct sockaddr_ib *) addr)->sib_addr);
1038 default:
1039 return 0;
1040 }
1041 }
1042
1043 static inline int cma_loopback_addr(struct sockaddr *addr)
1044 {
1045 switch (addr->sa_family) {
1046 case AF_INET:
1047 return ipv4_is_loopback(((struct sockaddr_in *) addr)->sin_addr.s_addr);
1048 case AF_INET6:
1049 return ipv6_addr_loopback(&((struct sockaddr_in6 *) addr)->sin6_addr);
1050 case AF_IB:
1051 return ib_addr_loopback(&((struct sockaddr_ib *) addr)->sib_addr);
1052 default:
1053 return 0;
1054 }
1055 }
1056
1057 static inline int cma_any_addr(struct sockaddr *addr)
1058 {
1059 return cma_zero_addr(addr) || cma_loopback_addr(addr);
1060 }
1061
1062 static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
1063 {
1064 if (src->sa_family != dst->sa_family)
1065 return -1;
1066
1067 switch (src->sa_family) {
1068 case AF_INET:
1069 return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
1070 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
1071 case AF_INET6:
1072 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
1073 &((struct sockaddr_in6 *) dst)->sin6_addr);
1074 default:
1075 return ib_addr_cmp(&((struct sockaddr_ib *) src)->sib_addr,
1076 &((struct sockaddr_ib *) dst)->sib_addr);
1077 }
1078 }
1079
1080 static __be16 cma_port(struct sockaddr *addr)
1081 {
1082 struct sockaddr_ib *sib;
1083
1084 switch (addr->sa_family) {
1085 case AF_INET:
1086 return ((struct sockaddr_in *) addr)->sin_port;
1087 case AF_INET6:
1088 return ((struct sockaddr_in6 *) addr)->sin6_port;
1089 case AF_IB:
1090 sib = (struct sockaddr_ib *) addr;
1091 return htons((u16) (be64_to_cpu(sib->sib_sid) &
1092 be64_to_cpu(sib->sib_sid_mask)));
1093 default:
1094 return 0;
1095 }
1096 }
1097
1098 static inline int cma_any_port(struct sockaddr *addr)
1099 {
1100 return !cma_port(addr);
1101 }
1102
1103 static void cma_save_ib_info(struct sockaddr *src_addr,
1104 struct sockaddr *dst_addr,
1105 struct rdma_cm_id *listen_id,
1106 struct ib_sa_path_rec *path)
1107 {
1108 struct sockaddr_ib *listen_ib, *ib;
1109
1110 listen_ib = (struct sockaddr_ib *) &listen_id->route.addr.src_addr;
1111 if (src_addr) {
1112 ib = (struct sockaddr_ib *)src_addr;
1113 ib->sib_family = AF_IB;
1114 if (path) {
1115 ib->sib_pkey = path->pkey;
1116 ib->sib_flowinfo = path->flow_label;
1117 memcpy(&ib->sib_addr, &path->sgid, 16);
1118 ib->sib_sid = path->service_id;
1119 ib->sib_scope_id = 0;
1120 } else {
1121 ib->sib_pkey = listen_ib->sib_pkey;
1122 ib->sib_flowinfo = listen_ib->sib_flowinfo;
1123 ib->sib_addr = listen_ib->sib_addr;
1124 ib->sib_sid = listen_ib->sib_sid;
1125 ib->sib_scope_id = listen_ib->sib_scope_id;
1126 }
1127 ib->sib_sid_mask = cpu_to_be64(0xffffffffffffffffULL);
1128 }
1129 if (dst_addr) {
1130 ib = (struct sockaddr_ib *)dst_addr;
1131 ib->sib_family = AF_IB;
1132 if (path) {
1133 ib->sib_pkey = path->pkey;
1134 ib->sib_flowinfo = path->flow_label;
1135 memcpy(&ib->sib_addr, &path->dgid, 16);
1136 }
1137 }
1138 }
1139
1140 static void cma_save_ip4_info(struct sockaddr_in *src_addr,
1141 struct sockaddr_in *dst_addr,
1142 struct cma_hdr *hdr,
1143 __be16 local_port)
1144 {
1145 if (src_addr) {
1146 *src_addr = (struct sockaddr_in) {
1147 .sin_family = AF_INET,
1148 .sin_addr.s_addr = hdr->dst_addr.ip4.addr,
1149 .sin_port = local_port,
1150 };
1151 }
1152
1153 if (dst_addr) {
1154 *dst_addr = (struct sockaddr_in) {
1155 .sin_family = AF_INET,
1156 .sin_addr.s_addr = hdr->src_addr.ip4.addr,
1157 .sin_port = hdr->port,
1158 };
1159 }
1160 }
1161
1162 static void cma_save_ip6_info(struct sockaddr_in6 *src_addr,
1163 struct sockaddr_in6 *dst_addr,
1164 struct cma_hdr *hdr,
1165 __be16 local_port)
1166 {
1167 if (src_addr) {
1168 *src_addr = (struct sockaddr_in6) {
1169 .sin6_family = AF_INET6,
1170 .sin6_addr = hdr->dst_addr.ip6,
1171 .sin6_port = local_port,
1172 };
1173 }
1174
1175 if (dst_addr) {
1176 *dst_addr = (struct sockaddr_in6) {
1177 .sin6_family = AF_INET6,
1178 .sin6_addr = hdr->src_addr.ip6,
1179 .sin6_port = hdr->port,
1180 };
1181 }
1182 }
1183
1184 static u16 cma_port_from_service_id(__be64 service_id)
1185 {
1186 return (u16)be64_to_cpu(service_id);
1187 }
1188
1189 static int cma_save_ip_info(struct sockaddr *src_addr,
1190 struct sockaddr *dst_addr,
1191 struct ib_cm_event *ib_event,
1192 __be64 service_id)
1193 {
1194 struct cma_hdr *hdr;
1195 __be16 port;
1196
1197 hdr = ib_event->private_data;
1198 if (hdr->cma_version != CMA_VERSION)
1199 return -EINVAL;
1200
1201 port = htons(cma_port_from_service_id(service_id));
1202
1203 switch (cma_get_ip_ver(hdr)) {
1204 case 4:
1205 cma_save_ip4_info((struct sockaddr_in *)src_addr,
1206 (struct sockaddr_in *)dst_addr, hdr, port);
1207 break;
1208 case 6:
1209 cma_save_ip6_info((struct sockaddr_in6 *)src_addr,
1210 (struct sockaddr_in6 *)dst_addr, hdr, port);
1211 break;
1212 default:
1213 return -EAFNOSUPPORT;
1214 }
1215
1216 return 0;
1217 }
1218
1219 static int cma_save_net_info(struct sockaddr *src_addr,
1220 struct sockaddr *dst_addr,
1221 struct rdma_cm_id *listen_id,
1222 struct ib_cm_event *ib_event,
1223 sa_family_t sa_family, __be64 service_id)
1224 {
1225 if (sa_family == AF_IB) {
1226 if (ib_event->event == IB_CM_REQ_RECEIVED)
1227 cma_save_ib_info(src_addr, dst_addr, listen_id,
1228 ib_event->param.req_rcvd.primary_path);
1229 else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED)
1230 cma_save_ib_info(src_addr, dst_addr, listen_id, NULL);
1231 return 0;
1232 }
1233
1234 return cma_save_ip_info(src_addr, dst_addr, ib_event, service_id);
1235 }
1236
1237 static int cma_save_req_info(const struct ib_cm_event *ib_event,
1238 struct cma_req_info *req)
1239 {
1240 const struct ib_cm_req_event_param *req_param =
1241 &ib_event->param.req_rcvd;
1242 const struct ib_cm_sidr_req_event_param *sidr_param =
1243 &ib_event->param.sidr_req_rcvd;
1244
1245 switch (ib_event->event) {
1246 case IB_CM_REQ_RECEIVED:
1247 req->device = req_param->listen_id->device;
1248 req->port = req_param->port;
1249 memcpy(&req->local_gid, &req_param->primary_path->sgid,
1250 sizeof(req->local_gid));
1251 req->has_gid = true;
1252 req->service_id = req_param->primary_path->service_id;
1253 req->pkey = be16_to_cpu(req_param->primary_path->pkey);
1254 if (req->pkey != req_param->bth_pkey)
1255 pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and primary path P_Key (0x%x)\n"
1256 "RDMA CMA: in the future this may cause the request to be dropped\n",
1257 req_param->bth_pkey, req->pkey);
1258 break;
1259 case IB_CM_SIDR_REQ_RECEIVED:
1260 req->device = sidr_param->listen_id->device;
1261 req->port = sidr_param->port;
1262 req->has_gid = false;
1263 req->service_id = sidr_param->service_id;
1264 req->pkey = sidr_param->pkey;
1265 if (req->pkey != sidr_param->bth_pkey)
1266 pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and SIDR request payload P_Key (0x%x)\n"
1267 "RDMA CMA: in the future this may cause the request to be dropped\n",
1268 sidr_param->bth_pkey, req->pkey);
1269 break;
1270 default:
1271 return -EINVAL;
1272 }
1273
1274 return 0;
1275 }
1276
1277 static bool validate_ipv4_net_dev(struct net_device *net_dev,
1278 const struct sockaddr_in *dst_addr,
1279 const struct sockaddr_in *src_addr)
1280 {
1281 __be32 daddr = dst_addr->sin_addr.s_addr,
1282 saddr = src_addr->sin_addr.s_addr;
1283 struct fib_result res;
1284 struct flowi4 fl4;
1285 int err;
1286 bool ret;
1287
1288 if (ipv4_is_multicast(saddr) || ipv4_is_lbcast(saddr) ||
1289 ipv4_is_lbcast(daddr) || ipv4_is_zeronet(saddr) ||
1290 ipv4_is_zeronet(daddr) || ipv4_is_loopback(daddr) ||
1291 ipv4_is_loopback(saddr))
1292 return false;
1293
1294 memset(&fl4, 0, sizeof(fl4));
1295 fl4.flowi4_iif = net_dev->ifindex;
1296 fl4.daddr = daddr;
1297 fl4.saddr = saddr;
1298
1299 rcu_read_lock();
1300 err = fib_lookup(dev_net(net_dev), &fl4, &res, 0);
1301 ret = err == 0 && FIB_RES_DEV(res) == net_dev;
1302 rcu_read_unlock();
1303
1304 return ret;
1305 }
1306
1307 static bool validate_ipv6_net_dev(struct net_device *net_dev,
1308 const struct sockaddr_in6 *dst_addr,
1309 const struct sockaddr_in6 *src_addr)
1310 {
1311 #if IS_ENABLED(CONFIG_IPV6)
1312 const int strict = ipv6_addr_type(&dst_addr->sin6_addr) &
1313 IPV6_ADDR_LINKLOCAL;
1314 struct rt6_info *rt = rt6_lookup(dev_net(net_dev), &dst_addr->sin6_addr,
1315 &src_addr->sin6_addr, net_dev->ifindex,
1316 strict);
1317 bool ret;
1318
1319 if (!rt)
1320 return false;
1321
1322 ret = rt->rt6i_idev->dev == net_dev;
1323 ip6_rt_put(rt);
1324
1325 return ret;
1326 #else
1327 return false;
1328 #endif
1329 }
1330
1331 static bool validate_net_dev(struct net_device *net_dev,
1332 const struct sockaddr *daddr,
1333 const struct sockaddr *saddr)
1334 {
1335 const struct sockaddr_in *daddr4 = (const struct sockaddr_in *)daddr;
1336 const struct sockaddr_in *saddr4 = (const struct sockaddr_in *)saddr;
1337 const struct sockaddr_in6 *daddr6 = (const struct sockaddr_in6 *)daddr;
1338 const struct sockaddr_in6 *saddr6 = (const struct sockaddr_in6 *)saddr;
1339
1340 switch (daddr->sa_family) {
1341 case AF_INET:
1342 return saddr->sa_family == AF_INET &&
1343 validate_ipv4_net_dev(net_dev, daddr4, saddr4);
1344
1345 case AF_INET6:
1346 return saddr->sa_family == AF_INET6 &&
1347 validate_ipv6_net_dev(net_dev, daddr6, saddr6);
1348
1349 default:
1350 return false;
1351 }
1352 }
1353
1354 static struct net_device *cma_get_net_dev(struct ib_cm_event *ib_event,
1355 const struct cma_req_info *req)
1356 {
1357 struct sockaddr_storage listen_addr_storage, src_addr_storage;
1358 struct sockaddr *listen_addr = (struct sockaddr *)&listen_addr_storage,
1359 *src_addr = (struct sockaddr *)&src_addr_storage;
1360 struct net_device *net_dev;
1361 const union ib_gid *gid = req->has_gid ? &req->local_gid : NULL;
1362 int err;
1363
1364 err = cma_save_ip_info(listen_addr, src_addr, ib_event,
1365 req->service_id);
1366 if (err)
1367 return ERR_PTR(err);
1368
1369 net_dev = ib_get_net_dev_by_params(req->device, req->port, req->pkey,
1370 gid, listen_addr);
1371 if (!net_dev)
1372 return ERR_PTR(-ENODEV);
1373
1374 if (!validate_net_dev(net_dev, listen_addr, src_addr)) {
1375 dev_put(net_dev);
1376 return ERR_PTR(-EHOSTUNREACH);
1377 }
1378
1379 return net_dev;
1380 }
1381
1382 static enum rdma_port_space rdma_ps_from_service_id(__be64 service_id)
1383 {
1384 return (be64_to_cpu(service_id) >> 16) & 0xffff;
1385 }
1386
1387 static bool cma_match_private_data(struct rdma_id_private *id_priv,
1388 const struct cma_hdr *hdr)
1389 {
1390 struct sockaddr *addr = cma_src_addr(id_priv);
1391 __be32 ip4_addr;
1392 struct in6_addr ip6_addr;
1393
1394 if (cma_any_addr(addr) && !id_priv->afonly)
1395 return true;
1396
1397 switch (addr->sa_family) {
1398 case AF_INET:
1399 ip4_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
1400 if (cma_get_ip_ver(hdr) != 4)
1401 return false;
1402 if (!cma_any_addr(addr) &&
1403 hdr->dst_addr.ip4.addr != ip4_addr)
1404 return false;
1405 break;
1406 case AF_INET6:
1407 ip6_addr = ((struct sockaddr_in6 *)addr)->sin6_addr;
1408 if (cma_get_ip_ver(hdr) != 6)
1409 return false;
1410 if (!cma_any_addr(addr) &&
1411 memcmp(&hdr->dst_addr.ip6, &ip6_addr, sizeof(ip6_addr)))
1412 return false;
1413 break;
1414 case AF_IB:
1415 return true;
1416 default:
1417 return false;
1418 }
1419
1420 return true;
1421 }
1422
1423 static bool cma_protocol_roce_dev_port(struct ib_device *device, int port_num)
1424 {
1425 enum rdma_link_layer ll = rdma_port_get_link_layer(device, port_num);
1426 enum rdma_transport_type transport =
1427 rdma_node_get_transport(device->node_type);
1428
1429 return ll == IB_LINK_LAYER_ETHERNET && transport == RDMA_TRANSPORT_IB;
1430 }
1431
1432 static bool cma_protocol_roce(const struct rdma_cm_id *id)
1433 {
1434 struct ib_device *device = id->device;
1435 const int port_num = id->port_num ?: rdma_start_port(device);
1436
1437 return cma_protocol_roce_dev_port(device, port_num);
1438 }
1439
1440 static bool cma_match_net_dev(const struct rdma_cm_id *id,
1441 const struct net_device *net_dev,
1442 u8 port_num)
1443 {
1444 const struct rdma_addr *addr = &id->route.addr;
1445
1446 if (!net_dev)
1447 /* This request is an AF_IB request or a RoCE request */
1448 return (!id->port_num || id->port_num == port_num) &&
1449 (addr->src_addr.ss_family == AF_IB ||
1450 cma_protocol_roce_dev_port(id->device, port_num));
1451
1452 return !addr->dev_addr.bound_dev_if ||
1453 (net_eq(dev_net(net_dev), addr->dev_addr.net) &&
1454 addr->dev_addr.bound_dev_if == net_dev->ifindex);
1455 }
1456
1457 static struct rdma_id_private *cma_find_listener(
1458 const struct rdma_bind_list *bind_list,
1459 const struct ib_cm_id *cm_id,
1460 const struct ib_cm_event *ib_event,
1461 const struct cma_req_info *req,
1462 const struct net_device *net_dev)
1463 {
1464 struct rdma_id_private *id_priv, *id_priv_dev;
1465
1466 if (!bind_list)
1467 return ERR_PTR(-EINVAL);
1468
1469 hlist_for_each_entry(id_priv, &bind_list->owners, node) {
1470 if (cma_match_private_data(id_priv, ib_event->private_data)) {
1471 if (id_priv->id.device == cm_id->device &&
1472 cma_match_net_dev(&id_priv->id, net_dev, req->port))
1473 return id_priv;
1474 list_for_each_entry(id_priv_dev,
1475 &id_priv->listen_list,
1476 listen_list) {
1477 if (id_priv_dev->id.device == cm_id->device &&
1478 cma_match_net_dev(&id_priv_dev->id, net_dev, req->port))
1479 return id_priv_dev;
1480 }
1481 }
1482 }
1483
1484 return ERR_PTR(-EINVAL);
1485 }
1486
1487 static struct rdma_id_private *cma_id_from_event(struct ib_cm_id *cm_id,
1488 struct ib_cm_event *ib_event,
1489 struct net_device **net_dev)
1490 {
1491 struct cma_req_info req;
1492 struct rdma_bind_list *bind_list;
1493 struct rdma_id_private *id_priv;
1494 int err;
1495
1496 err = cma_save_req_info(ib_event, &req);
1497 if (err)
1498 return ERR_PTR(err);
1499
1500 *net_dev = cma_get_net_dev(ib_event, &req);
1501 if (IS_ERR(*net_dev)) {
1502 if (PTR_ERR(*net_dev) == -EAFNOSUPPORT) {
1503 /* Assuming the protocol is AF_IB */
1504 *net_dev = NULL;
1505 } else if (cma_protocol_roce_dev_port(req.device, req.port)) {
1506 /* TODO find the net dev matching the request parameters
1507 * through the RoCE GID table */
1508 *net_dev = NULL;
1509 } else {
1510 return ERR_CAST(*net_dev);
1511 }
1512 }
1513
1514 bind_list = cma_ps_find(*net_dev ? dev_net(*net_dev) : &init_net,
1515 rdma_ps_from_service_id(req.service_id),
1516 cma_port_from_service_id(req.service_id));
1517 id_priv = cma_find_listener(bind_list, cm_id, ib_event, &req, *net_dev);
1518 if (IS_ERR(id_priv) && *net_dev) {
1519 dev_put(*net_dev);
1520 *net_dev = NULL;
1521 }
1522
1523 return id_priv;
1524 }
1525
1526 static inline int cma_user_data_offset(struct rdma_id_private *id_priv)
1527 {
1528 return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr);
1529 }
1530
1531 static void cma_cancel_route(struct rdma_id_private *id_priv)
1532 {
1533 if (rdma_cap_ib_sa(id_priv->id.device, id_priv->id.port_num)) {
1534 if (id_priv->query)
1535 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
1536 }
1537 }
1538
1539 static void cma_cancel_listens(struct rdma_id_private *id_priv)
1540 {
1541 struct rdma_id_private *dev_id_priv;
1542
1543 /*
1544 * Remove from listen_any_list to prevent added devices from spawning
1545 * additional listen requests.
1546 */
1547 mutex_lock(&lock);
1548 list_del(&id_priv->list);
1549
1550 while (!list_empty(&id_priv->listen_list)) {
1551 dev_id_priv = list_entry(id_priv->listen_list.next,
1552 struct rdma_id_private, listen_list);
1553 /* sync with device removal to avoid duplicate destruction */
1554 list_del_init(&dev_id_priv->list);
1555 list_del(&dev_id_priv->listen_list);
1556 mutex_unlock(&lock);
1557
1558 rdma_destroy_id(&dev_id_priv->id);
1559 mutex_lock(&lock);
1560 }
1561 mutex_unlock(&lock);
1562 }
1563
1564 static void cma_cancel_operation(struct rdma_id_private *id_priv,
1565 enum rdma_cm_state state)
1566 {
1567 switch (state) {
1568 case RDMA_CM_ADDR_QUERY:
1569 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
1570 break;
1571 case RDMA_CM_ROUTE_QUERY:
1572 cma_cancel_route(id_priv);
1573 break;
1574 case RDMA_CM_LISTEN:
1575 if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev)
1576 cma_cancel_listens(id_priv);
1577 break;
1578 default:
1579 break;
1580 }
1581 }
1582
1583 static void cma_release_port(struct rdma_id_private *id_priv)
1584 {
1585 struct rdma_bind_list *bind_list = id_priv->bind_list;
1586 struct net *net = id_priv->id.route.addr.dev_addr.net;
1587
1588 if (!bind_list)
1589 return;
1590
1591 mutex_lock(&lock);
1592 hlist_del(&id_priv->node);
1593 if (hlist_empty(&bind_list->owners)) {
1594 cma_ps_remove(net, bind_list->ps, bind_list->port);
1595 kfree(bind_list);
1596 }
1597 mutex_unlock(&lock);
1598 }
1599
1600 static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
1601 {
1602 struct cma_multicast *mc;
1603
1604 while (!list_empty(&id_priv->mc_list)) {
1605 mc = container_of(id_priv->mc_list.next,
1606 struct cma_multicast, list);
1607 list_del(&mc->list);
1608 if (rdma_cap_ib_mcast(id_priv->cma_dev->device,
1609 id_priv->id.port_num)) {
1610 ib_sa_free_multicast(mc->multicast.ib);
1611 kfree(mc);
1612 } else {
1613 if (mc->igmp_joined) {
1614 struct rdma_dev_addr *dev_addr =
1615 &id_priv->id.route.addr.dev_addr;
1616 struct net_device *ndev = NULL;
1617
1618 if (dev_addr->bound_dev_if)
1619 ndev = dev_get_by_index(&init_net,
1620 dev_addr->bound_dev_if);
1621 if (ndev) {
1622 cma_igmp_send(ndev,
1623 &mc->multicast.ib->rec.mgid,
1624 false);
1625 dev_put(ndev);
1626 }
1627 }
1628 kref_put(&mc->mcref, release_mc);
1629 }
1630 }
1631 }
1632
1633 void rdma_destroy_id(struct rdma_cm_id *id)
1634 {
1635 struct rdma_id_private *id_priv;
1636 enum rdma_cm_state state;
1637
1638 id_priv = container_of(id, struct rdma_id_private, id);
1639 state = cma_exch(id_priv, RDMA_CM_DESTROYING);
1640 cma_cancel_operation(id_priv, state);
1641
1642 /*
1643 * Wait for any active callback to finish. New callbacks will find
1644 * the id_priv state set to destroying and abort.
1645 */
1646 mutex_lock(&id_priv->handler_mutex);
1647 mutex_unlock(&id_priv->handler_mutex);
1648
1649 if (id_priv->cma_dev) {
1650 if (rdma_cap_ib_cm(id_priv->id.device, 1)) {
1651 if (id_priv->cm_id.ib)
1652 ib_destroy_cm_id(id_priv->cm_id.ib);
1653 } else if (rdma_cap_iw_cm(id_priv->id.device, 1)) {
1654 if (id_priv->cm_id.iw)
1655 iw_destroy_cm_id(id_priv->cm_id.iw);
1656 }
1657 cma_leave_mc_groups(id_priv);
1658 cma_release_dev(id_priv);
1659 }
1660
1661 cma_release_port(id_priv);
1662 cma_deref_id(id_priv);
1663 wait_for_completion(&id_priv->comp);
1664
1665 if (id_priv->internal_id)
1666 cma_deref_id(id_priv->id.context);
1667
1668 kfree(id_priv->id.route.path_rec);
1669 put_net(id_priv->id.route.addr.dev_addr.net);
1670 kfree(id_priv);
1671 }
1672 EXPORT_SYMBOL(rdma_destroy_id);
1673
1674 static int cma_rep_recv(struct rdma_id_private *id_priv)
1675 {
1676 int ret;
1677
1678 ret = cma_modify_qp_rtr(id_priv, NULL);
1679 if (ret)
1680 goto reject;
1681
1682 ret = cma_modify_qp_rts(id_priv, NULL);
1683 if (ret)
1684 goto reject;
1685
1686 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
1687 if (ret)
1688 goto reject;
1689
1690 return 0;
1691 reject:
1692 cma_modify_qp_err(id_priv);
1693 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
1694 NULL, 0, NULL, 0);
1695 return ret;
1696 }
1697
1698 static void cma_set_rep_event_data(struct rdma_cm_event *event,
1699 struct ib_cm_rep_event_param *rep_data,
1700 void *private_data)
1701 {
1702 event->param.conn.private_data = private_data;
1703 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
1704 event->param.conn.responder_resources = rep_data->responder_resources;
1705 event->param.conn.initiator_depth = rep_data->initiator_depth;
1706 event->param.conn.flow_control = rep_data->flow_control;
1707 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
1708 event->param.conn.srq = rep_data->srq;
1709 event->param.conn.qp_num = rep_data->remote_qpn;
1710 }
1711
1712 static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1713 {
1714 struct rdma_id_private *id_priv = cm_id->context;
1715 struct rdma_cm_event event;
1716 int ret = 0;
1717
1718 mutex_lock(&id_priv->handler_mutex);
1719 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
1720 id_priv->state != RDMA_CM_CONNECT) ||
1721 (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
1722 id_priv->state != RDMA_CM_DISCONNECT))
1723 goto out;
1724
1725 memset(&event, 0, sizeof event);
1726 switch (ib_event->event) {
1727 case IB_CM_REQ_ERROR:
1728 case IB_CM_REP_ERROR:
1729 event.event = RDMA_CM_EVENT_UNREACHABLE;
1730 event.status = -ETIMEDOUT;
1731 break;
1732 case IB_CM_REP_RECEIVED:
1733 if (id_priv->id.qp) {
1734 event.status = cma_rep_recv(id_priv);
1735 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1736 RDMA_CM_EVENT_ESTABLISHED;
1737 } else {
1738 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
1739 }
1740 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1741 ib_event->private_data);
1742 break;
1743 case IB_CM_RTU_RECEIVED:
1744 case IB_CM_USER_ESTABLISHED:
1745 event.event = RDMA_CM_EVENT_ESTABLISHED;
1746 break;
1747 case IB_CM_DREQ_ERROR:
1748 event.status = -ETIMEDOUT; /* fall through */
1749 case IB_CM_DREQ_RECEIVED:
1750 case IB_CM_DREP_RECEIVED:
1751 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
1752 RDMA_CM_DISCONNECT))
1753 goto out;
1754 event.event = RDMA_CM_EVENT_DISCONNECTED;
1755 break;
1756 case IB_CM_TIMEWAIT_EXIT:
1757 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1758 break;
1759 case IB_CM_MRA_RECEIVED:
1760 /* ignore event */
1761 goto out;
1762 case IB_CM_REJ_RECEIVED:
1763 cma_modify_qp_err(id_priv);
1764 event.status = ib_event->param.rej_rcvd.reason;
1765 event.event = RDMA_CM_EVENT_REJECTED;
1766 event.param.conn.private_data = ib_event->private_data;
1767 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
1768 break;
1769 default:
1770 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
1771 ib_event->event);
1772 goto out;
1773 }
1774
1775 ret = id_priv->id.event_handler(&id_priv->id, &event);
1776 if (ret) {
1777 /* Destroy the CM ID by returning a non-zero value. */
1778 id_priv->cm_id.ib = NULL;
1779 cma_exch(id_priv, RDMA_CM_DESTROYING);
1780 mutex_unlock(&id_priv->handler_mutex);
1781 rdma_destroy_id(&id_priv->id);
1782 return ret;
1783 }
1784 out:
1785 mutex_unlock(&id_priv->handler_mutex);
1786 return ret;
1787 }
1788
1789 static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
1790 struct ib_cm_event *ib_event,
1791 struct net_device *net_dev)
1792 {
1793 struct rdma_id_private *id_priv;
1794 struct rdma_cm_id *id;
1795 struct rdma_route *rt;
1796 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
1797 const __be64 service_id =
1798 ib_event->param.req_rcvd.primary_path->service_id;
1799 int ret;
1800
1801 id = rdma_create_id(listen_id->route.addr.dev_addr.net,
1802 listen_id->event_handler, listen_id->context,
1803 listen_id->ps, ib_event->param.req_rcvd.qp_type);
1804 if (IS_ERR(id))
1805 return NULL;
1806
1807 id_priv = container_of(id, struct rdma_id_private, id);
1808 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
1809 (struct sockaddr *)&id->route.addr.dst_addr,
1810 listen_id, ib_event, ss_family, service_id))
1811 goto err;
1812
1813 rt = &id->route;
1814 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
1815 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1816 GFP_KERNEL);
1817 if (!rt->path_rec)
1818 goto err;
1819
1820 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
1821 if (rt->num_paths == 2)
1822 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1823
1824 if (net_dev) {
1825 ret = rdma_copy_addr(&rt->addr.dev_addr, net_dev, NULL);
1826 if (ret)
1827 goto err;
1828 } else {
1829 if (!cma_protocol_roce(listen_id) &&
1830 cma_any_addr(cma_src_addr(id_priv))) {
1831 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
1832 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
1833 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
1834 } else if (!cma_any_addr(cma_src_addr(id_priv))) {
1835 ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr);
1836 if (ret)
1837 goto err;
1838 }
1839 }
1840 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
1841
1842 id_priv->state = RDMA_CM_CONNECT;
1843 return id_priv;
1844
1845 err:
1846 rdma_destroy_id(id);
1847 return NULL;
1848 }
1849
1850 static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1851 struct ib_cm_event *ib_event,
1852 struct net_device *net_dev)
1853 {
1854 struct rdma_id_private *id_priv;
1855 struct rdma_cm_id *id;
1856 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
1857 struct net *net = listen_id->route.addr.dev_addr.net;
1858 int ret;
1859
1860 id = rdma_create_id(net, listen_id->event_handler, listen_id->context,
1861 listen_id->ps, IB_QPT_UD);
1862 if (IS_ERR(id))
1863 return NULL;
1864
1865 id_priv = container_of(id, struct rdma_id_private, id);
1866 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
1867 (struct sockaddr *)&id->route.addr.dst_addr,
1868 listen_id, ib_event, ss_family,
1869 ib_event->param.sidr_req_rcvd.service_id))
1870 goto err;
1871
1872 if (net_dev) {
1873 ret = rdma_copy_addr(&id->route.addr.dev_addr, net_dev, NULL);
1874 if (ret)
1875 goto err;
1876 } else {
1877 if (!cma_any_addr(cma_src_addr(id_priv))) {
1878 ret = cma_translate_addr(cma_src_addr(id_priv),
1879 &id->route.addr.dev_addr);
1880 if (ret)
1881 goto err;
1882 }
1883 }
1884
1885 id_priv->state = RDMA_CM_CONNECT;
1886 return id_priv;
1887 err:
1888 rdma_destroy_id(id);
1889 return NULL;
1890 }
1891
1892 static void cma_set_req_event_data(struct rdma_cm_event *event,
1893 struct ib_cm_req_event_param *req_data,
1894 void *private_data, int offset)
1895 {
1896 event->param.conn.private_data = private_data + offset;
1897 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1898 event->param.conn.responder_resources = req_data->responder_resources;
1899 event->param.conn.initiator_depth = req_data->initiator_depth;
1900 event->param.conn.flow_control = req_data->flow_control;
1901 event->param.conn.retry_count = req_data->retry_count;
1902 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1903 event->param.conn.srq = req_data->srq;
1904 event->param.conn.qp_num = req_data->remote_qpn;
1905 }
1906
1907 static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event)
1908 {
1909 return (((ib_event->event == IB_CM_REQ_RECEIVED) &&
1910 (ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
1911 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
1912 (id->qp_type == IB_QPT_UD)) ||
1913 (!id->qp_type));
1914 }
1915
1916 static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1917 {
1918 struct rdma_id_private *listen_id, *conn_id = NULL;
1919 struct rdma_cm_event event;
1920 struct net_device *net_dev;
1921 int offset, ret;
1922
1923 listen_id = cma_id_from_event(cm_id, ib_event, &net_dev);
1924 if (IS_ERR(listen_id))
1925 return PTR_ERR(listen_id);
1926
1927 if (!cma_check_req_qp_type(&listen_id->id, ib_event)) {
1928 ret = -EINVAL;
1929 goto net_dev_put;
1930 }
1931
1932 mutex_lock(&listen_id->handler_mutex);
1933 if (listen_id->state != RDMA_CM_LISTEN) {
1934 ret = -ECONNABORTED;
1935 goto err1;
1936 }
1937
1938 memset(&event, 0, sizeof event);
1939 offset = cma_user_data_offset(listen_id);
1940 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1941 if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
1942 conn_id = cma_new_udp_id(&listen_id->id, ib_event, net_dev);
1943 event.param.ud.private_data = ib_event->private_data + offset;
1944 event.param.ud.private_data_len =
1945 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1946 } else {
1947 conn_id = cma_new_conn_id(&listen_id->id, ib_event, net_dev);
1948 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1949 ib_event->private_data, offset);
1950 }
1951 if (!conn_id) {
1952 ret = -ENOMEM;
1953 goto err1;
1954 }
1955
1956 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1957 ret = cma_acquire_dev(conn_id, listen_id);
1958 if (ret)
1959 goto err2;
1960
1961 conn_id->cm_id.ib = cm_id;
1962 cm_id->context = conn_id;
1963 cm_id->cm_handler = cma_ib_handler;
1964
1965 /*
1966 * Protect against the user destroying conn_id from another thread
1967 * until we're done accessing it.
1968 */
1969 atomic_inc(&conn_id->refcount);
1970 ret = conn_id->id.event_handler(&conn_id->id, &event);
1971 if (ret)
1972 goto err3;
1973 /*
1974 * Acquire mutex to prevent user executing rdma_destroy_id()
1975 * while we're accessing the cm_id.
1976 */
1977 mutex_lock(&lock);
1978 if (cma_comp(conn_id, RDMA_CM_CONNECT) &&
1979 (conn_id->id.qp_type != IB_QPT_UD))
1980 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1981 mutex_unlock(&lock);
1982 mutex_unlock(&conn_id->handler_mutex);
1983 mutex_unlock(&listen_id->handler_mutex);
1984 cma_deref_id(conn_id);
1985 if (net_dev)
1986 dev_put(net_dev);
1987 return 0;
1988
1989 err3:
1990 cma_deref_id(conn_id);
1991 /* Destroy the CM ID by returning a non-zero value. */
1992 conn_id->cm_id.ib = NULL;
1993 err2:
1994 cma_exch(conn_id, RDMA_CM_DESTROYING);
1995 mutex_unlock(&conn_id->handler_mutex);
1996 err1:
1997 mutex_unlock(&listen_id->handler_mutex);
1998 if (conn_id)
1999 rdma_destroy_id(&conn_id->id);
2000
2001 net_dev_put:
2002 if (net_dev)
2003 dev_put(net_dev);
2004
2005 return ret;
2006 }
2007
2008 __be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr)
2009 {
2010 if (addr->sa_family == AF_IB)
2011 return ((struct sockaddr_ib *) addr)->sib_sid;
2012
2013 return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr)));
2014 }
2015 EXPORT_SYMBOL(rdma_get_service_id);
2016
2017 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
2018 {
2019 struct rdma_id_private *id_priv = iw_id->context;
2020 struct rdma_cm_event event;
2021 int ret = 0;
2022 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
2023 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
2024
2025 mutex_lock(&id_priv->handler_mutex);
2026 if (id_priv->state != RDMA_CM_CONNECT)
2027 goto out;
2028
2029 memset(&event, 0, sizeof event);
2030 switch (iw_event->event) {
2031 case IW_CM_EVENT_CLOSE:
2032 event.event = RDMA_CM_EVENT_DISCONNECTED;
2033 break;
2034 case IW_CM_EVENT_CONNECT_REPLY:
2035 memcpy(cma_src_addr(id_priv), laddr,
2036 rdma_addr_size(laddr));
2037 memcpy(cma_dst_addr(id_priv), raddr,
2038 rdma_addr_size(raddr));
2039 switch (iw_event->status) {
2040 case 0:
2041 event.event = RDMA_CM_EVENT_ESTABLISHED;
2042 event.param.conn.initiator_depth = iw_event->ird;
2043 event.param.conn.responder_resources = iw_event->ord;
2044 break;
2045 case -ECONNRESET:
2046 case -ECONNREFUSED:
2047 event.event = RDMA_CM_EVENT_REJECTED;
2048 break;
2049 case -ETIMEDOUT:
2050 event.event = RDMA_CM_EVENT_UNREACHABLE;
2051 break;
2052 default:
2053 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
2054 break;
2055 }
2056 break;
2057 case IW_CM_EVENT_ESTABLISHED:
2058 event.event = RDMA_CM_EVENT_ESTABLISHED;
2059 event.param.conn.initiator_depth = iw_event->ird;
2060 event.param.conn.responder_resources = iw_event->ord;
2061 break;
2062 default:
2063 BUG_ON(1);
2064 }
2065
2066 event.status = iw_event->status;
2067 event.param.conn.private_data = iw_event->private_data;
2068 event.param.conn.private_data_len = iw_event->private_data_len;
2069 ret = id_priv->id.event_handler(&id_priv->id, &event);
2070 if (ret) {
2071 /* Destroy the CM ID by returning a non-zero value. */
2072 id_priv->cm_id.iw = NULL;
2073 cma_exch(id_priv, RDMA_CM_DESTROYING);
2074 mutex_unlock(&id_priv->handler_mutex);
2075 rdma_destroy_id(&id_priv->id);
2076 return ret;
2077 }
2078
2079 out:
2080 mutex_unlock(&id_priv->handler_mutex);
2081 return ret;
2082 }
2083
2084 static int iw_conn_req_handler(struct iw_cm_id *cm_id,
2085 struct iw_cm_event *iw_event)
2086 {
2087 struct rdma_cm_id *new_cm_id;
2088 struct rdma_id_private *listen_id, *conn_id;
2089 struct rdma_cm_event event;
2090 int ret = -ECONNABORTED;
2091 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
2092 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
2093
2094 listen_id = cm_id->context;
2095
2096 mutex_lock(&listen_id->handler_mutex);
2097 if (listen_id->state != RDMA_CM_LISTEN)
2098 goto out;
2099
2100 /* Create a new RDMA id for the new IW CM ID */
2101 new_cm_id = rdma_create_id(listen_id->id.route.addr.dev_addr.net,
2102 listen_id->id.event_handler,
2103 listen_id->id.context,
2104 RDMA_PS_TCP, IB_QPT_RC);
2105 if (IS_ERR(new_cm_id)) {
2106 ret = -ENOMEM;
2107 goto out;
2108 }
2109 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
2110 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
2111 conn_id->state = RDMA_CM_CONNECT;
2112
2113 ret = rdma_translate_ip(laddr, &conn_id->id.route.addr.dev_addr, NULL);
2114 if (ret) {
2115 mutex_unlock(&conn_id->handler_mutex);
2116 rdma_destroy_id(new_cm_id);
2117 goto out;
2118 }
2119
2120 ret = cma_acquire_dev(conn_id, listen_id);
2121 if (ret) {
2122 mutex_unlock(&conn_id->handler_mutex);
2123 rdma_destroy_id(new_cm_id);
2124 goto out;
2125 }
2126
2127 conn_id->cm_id.iw = cm_id;
2128 cm_id->context = conn_id;
2129 cm_id->cm_handler = cma_iw_handler;
2130
2131 memcpy(cma_src_addr(conn_id), laddr, rdma_addr_size(laddr));
2132 memcpy(cma_dst_addr(conn_id), raddr, rdma_addr_size(raddr));
2133
2134 memset(&event, 0, sizeof event);
2135 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
2136 event.param.conn.private_data = iw_event->private_data;
2137 event.param.conn.private_data_len = iw_event->private_data_len;
2138 event.param.conn.initiator_depth = iw_event->ird;
2139 event.param.conn.responder_resources = iw_event->ord;
2140
2141 /*
2142 * Protect against the user destroying conn_id from another thread
2143 * until we're done accessing it.
2144 */
2145 atomic_inc(&conn_id->refcount);
2146 ret = conn_id->id.event_handler(&conn_id->id, &event);
2147 if (ret) {
2148 /* User wants to destroy the CM ID */
2149 conn_id->cm_id.iw = NULL;
2150 cma_exch(conn_id, RDMA_CM_DESTROYING);
2151 mutex_unlock(&conn_id->handler_mutex);
2152 cma_deref_id(conn_id);
2153 rdma_destroy_id(&conn_id->id);
2154 goto out;
2155 }
2156
2157 mutex_unlock(&conn_id->handler_mutex);
2158 cma_deref_id(conn_id);
2159
2160 out:
2161 mutex_unlock(&listen_id->handler_mutex);
2162 return ret;
2163 }
2164
2165 static int cma_ib_listen(struct rdma_id_private *id_priv)
2166 {
2167 struct sockaddr *addr;
2168 struct ib_cm_id *id;
2169 __be64 svc_id;
2170
2171 addr = cma_src_addr(id_priv);
2172 svc_id = rdma_get_service_id(&id_priv->id, addr);
2173 id = ib_cm_insert_listen(id_priv->id.device, cma_req_handler, svc_id);
2174 if (IS_ERR(id))
2175 return PTR_ERR(id);
2176 id_priv->cm_id.ib = id;
2177
2178 return 0;
2179 }
2180
2181 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
2182 {
2183 int ret;
2184 struct iw_cm_id *id;
2185
2186 id = iw_create_cm_id(id_priv->id.device,
2187 iw_conn_req_handler,
2188 id_priv);
2189 if (IS_ERR(id))
2190 return PTR_ERR(id);
2191
2192 id->tos = id_priv->tos;
2193 id_priv->cm_id.iw = id;
2194
2195 memcpy(&id_priv->cm_id.iw->local_addr, cma_src_addr(id_priv),
2196 rdma_addr_size(cma_src_addr(id_priv)));
2197
2198 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
2199
2200 if (ret) {
2201 iw_destroy_cm_id(id_priv->cm_id.iw);
2202 id_priv->cm_id.iw = NULL;
2203 }
2204
2205 return ret;
2206 }
2207
2208 static int cma_listen_handler(struct rdma_cm_id *id,
2209 struct rdma_cm_event *event)
2210 {
2211 struct rdma_id_private *id_priv = id->context;
2212
2213 id->context = id_priv->id.context;
2214 id->event_handler = id_priv->id.event_handler;
2215 return id_priv->id.event_handler(id, event);
2216 }
2217
2218 static void cma_listen_on_dev(struct rdma_id_private *id_priv,
2219 struct cma_device *cma_dev)
2220 {
2221 struct rdma_id_private *dev_id_priv;
2222 struct rdma_cm_id *id;
2223 struct net *net = id_priv->id.route.addr.dev_addr.net;
2224 int ret;
2225
2226 if (cma_family(id_priv) == AF_IB && !rdma_cap_ib_cm(cma_dev->device, 1))
2227 return;
2228
2229 id = rdma_create_id(net, cma_listen_handler, id_priv, id_priv->id.ps,
2230 id_priv->id.qp_type);
2231 if (IS_ERR(id))
2232 return;
2233
2234 dev_id_priv = container_of(id, struct rdma_id_private, id);
2235
2236 dev_id_priv->state = RDMA_CM_ADDR_BOUND;
2237 memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv),
2238 rdma_addr_size(cma_src_addr(id_priv)));
2239
2240 _cma_attach_to_dev(dev_id_priv, cma_dev);
2241 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
2242 atomic_inc(&id_priv->refcount);
2243 dev_id_priv->internal_id = 1;
2244 dev_id_priv->afonly = id_priv->afonly;
2245
2246 ret = rdma_listen(id, id_priv->backlog);
2247 if (ret)
2248 pr_warn("RDMA CMA: cma_listen_on_dev, error %d, listening on device %s\n",
2249 ret, cma_dev->device->name);
2250 }
2251
2252 static void cma_listen_on_all(struct rdma_id_private *id_priv)
2253 {
2254 struct cma_device *cma_dev;
2255
2256 mutex_lock(&lock);
2257 list_add_tail(&id_priv->list, &listen_any_list);
2258 list_for_each_entry(cma_dev, &dev_list, list)
2259 cma_listen_on_dev(id_priv, cma_dev);
2260 mutex_unlock(&lock);
2261 }
2262
2263 void rdma_set_service_type(struct rdma_cm_id *id, int tos)
2264 {
2265 struct rdma_id_private *id_priv;
2266
2267 id_priv = container_of(id, struct rdma_id_private, id);
2268 id_priv->tos = (u8) tos;
2269 }
2270 EXPORT_SYMBOL(rdma_set_service_type);
2271
2272 static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
2273 void *context)
2274 {
2275 struct cma_work *work = context;
2276 struct rdma_route *route;
2277
2278 route = &work->id->id.route;
2279
2280 if (!status) {
2281 route->num_paths = 1;
2282 *route->path_rec = *path_rec;
2283 } else {
2284 work->old_state = RDMA_CM_ROUTE_QUERY;
2285 work->new_state = RDMA_CM_ADDR_RESOLVED;
2286 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
2287 work->event.status = status;
2288 }
2289
2290 queue_work(cma_wq, &work->work);
2291 }
2292
2293 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
2294 struct cma_work *work)
2295 {
2296 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2297 struct ib_sa_path_rec path_rec;
2298 ib_sa_comp_mask comp_mask;
2299 struct sockaddr_in6 *sin6;
2300 struct sockaddr_ib *sib;
2301
2302 memset(&path_rec, 0, sizeof path_rec);
2303 rdma_addr_get_sgid(dev_addr, &path_rec.sgid);
2304 rdma_addr_get_dgid(dev_addr, &path_rec.dgid);
2305 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
2306 path_rec.numb_path = 1;
2307 path_rec.reversible = 1;
2308 path_rec.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
2309
2310 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
2311 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
2312 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
2313
2314 switch (cma_family(id_priv)) {
2315 case AF_INET:
2316 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
2317 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
2318 break;
2319 case AF_INET6:
2320 sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
2321 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
2322 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2323 break;
2324 case AF_IB:
2325 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
2326 path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20);
2327 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2328 break;
2329 }
2330
2331 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
2332 id_priv->id.port_num, &path_rec,
2333 comp_mask, timeout_ms,
2334 GFP_KERNEL, cma_query_handler,
2335 work, &id_priv->query);
2336
2337 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
2338 }
2339
2340 static void cma_work_handler(struct work_struct *_work)
2341 {
2342 struct cma_work *work = container_of(_work, struct cma_work, work);
2343 struct rdma_id_private *id_priv = work->id;
2344 int destroy = 0;
2345
2346 mutex_lock(&id_priv->handler_mutex);
2347 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
2348 goto out;
2349
2350 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
2351 cma_exch(id_priv, RDMA_CM_DESTROYING);
2352 destroy = 1;
2353 }
2354 out:
2355 mutex_unlock(&id_priv->handler_mutex);
2356 cma_deref_id(id_priv);
2357 if (destroy)
2358 rdma_destroy_id(&id_priv->id);
2359 kfree(work);
2360 }
2361
2362 static void cma_ndev_work_handler(struct work_struct *_work)
2363 {
2364 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
2365 struct rdma_id_private *id_priv = work->id;
2366 int destroy = 0;
2367
2368 mutex_lock(&id_priv->handler_mutex);
2369 if (id_priv->state == RDMA_CM_DESTROYING ||
2370 id_priv->state == RDMA_CM_DEVICE_REMOVAL)
2371 goto out;
2372
2373 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
2374 cma_exch(id_priv, RDMA_CM_DESTROYING);
2375 destroy = 1;
2376 }
2377
2378 out:
2379 mutex_unlock(&id_priv->handler_mutex);
2380 cma_deref_id(id_priv);
2381 if (destroy)
2382 rdma_destroy_id(&id_priv->id);
2383 kfree(work);
2384 }
2385
2386 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
2387 {
2388 struct rdma_route *route = &id_priv->id.route;
2389 struct cma_work *work;
2390 int ret;
2391
2392 work = kzalloc(sizeof *work, GFP_KERNEL);
2393 if (!work)
2394 return -ENOMEM;
2395
2396 work->id = id_priv;
2397 INIT_WORK(&work->work, cma_work_handler);
2398 work->old_state = RDMA_CM_ROUTE_QUERY;
2399 work->new_state = RDMA_CM_ROUTE_RESOLVED;
2400 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2401
2402 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
2403 if (!route->path_rec) {
2404 ret = -ENOMEM;
2405 goto err1;
2406 }
2407
2408 ret = cma_query_ib_route(id_priv, timeout_ms, work);
2409 if (ret)
2410 goto err2;
2411
2412 return 0;
2413 err2:
2414 kfree(route->path_rec);
2415 route->path_rec = NULL;
2416 err1:
2417 kfree(work);
2418 return ret;
2419 }
2420
2421 int rdma_set_ib_paths(struct rdma_cm_id *id,
2422 struct ib_sa_path_rec *path_rec, int num_paths)
2423 {
2424 struct rdma_id_private *id_priv;
2425 int ret;
2426
2427 id_priv = container_of(id, struct rdma_id_private, id);
2428 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2429 RDMA_CM_ROUTE_RESOLVED))
2430 return -EINVAL;
2431
2432 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths,
2433 GFP_KERNEL);
2434 if (!id->route.path_rec) {
2435 ret = -ENOMEM;
2436 goto err;
2437 }
2438
2439 id->route.num_paths = num_paths;
2440 return 0;
2441 err:
2442 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
2443 return ret;
2444 }
2445 EXPORT_SYMBOL(rdma_set_ib_paths);
2446
2447 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
2448 {
2449 struct cma_work *work;
2450
2451 work = kzalloc(sizeof *work, GFP_KERNEL);
2452 if (!work)
2453 return -ENOMEM;
2454
2455 work->id = id_priv;
2456 INIT_WORK(&work->work, cma_work_handler);
2457 work->old_state = RDMA_CM_ROUTE_QUERY;
2458 work->new_state = RDMA_CM_ROUTE_RESOLVED;
2459 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2460 queue_work(cma_wq, &work->work);
2461 return 0;
2462 }
2463
2464 static int iboe_tos_to_sl(struct net_device *ndev, int tos)
2465 {
2466 int prio;
2467 struct net_device *dev;
2468
2469 prio = rt_tos2priority(tos);
2470 dev = ndev->priv_flags & IFF_802_1Q_VLAN ?
2471 vlan_dev_real_dev(ndev) : ndev;
2472
2473 if (dev->num_tc)
2474 return netdev_get_prio_tc_map(dev, prio);
2475
2476 #if IS_ENABLED(CONFIG_VLAN_8021Q)
2477 if (ndev->priv_flags & IFF_802_1Q_VLAN)
2478 return (vlan_dev_get_egress_qos_mask(ndev, prio) &
2479 VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
2480 #endif
2481 return 0;
2482 }
2483
2484 static enum ib_gid_type cma_route_gid_type(enum rdma_network_type network_type,
2485 unsigned long supported_gids,
2486 enum ib_gid_type default_gid)
2487 {
2488 if ((network_type == RDMA_NETWORK_IPV4 ||
2489 network_type == RDMA_NETWORK_IPV6) &&
2490 test_bit(IB_GID_TYPE_ROCE_UDP_ENCAP, &supported_gids))
2491 return IB_GID_TYPE_ROCE_UDP_ENCAP;
2492
2493 return default_gid;
2494 }
2495
2496 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
2497 {
2498 struct rdma_route *route = &id_priv->id.route;
2499 struct rdma_addr *addr = &route->addr;
2500 struct cma_work *work;
2501 int ret;
2502 struct net_device *ndev = NULL;
2503
2504
2505 work = kzalloc(sizeof *work, GFP_KERNEL);
2506 if (!work)
2507 return -ENOMEM;
2508
2509 work->id = id_priv;
2510 INIT_WORK(&work->work, cma_work_handler);
2511
2512 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
2513 if (!route->path_rec) {
2514 ret = -ENOMEM;
2515 goto err1;
2516 }
2517
2518 route->num_paths = 1;
2519
2520 if (addr->dev_addr.bound_dev_if) {
2521 unsigned long supported_gids;
2522
2523 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if);
2524 if (!ndev) {
2525 ret = -ENODEV;
2526 goto err2;
2527 }
2528
2529 if (ndev->flags & IFF_LOOPBACK) {
2530 dev_put(ndev);
2531 if (!id_priv->id.device->get_netdev) {
2532 ret = -EOPNOTSUPP;
2533 goto err2;
2534 }
2535
2536 ndev = id_priv->id.device->get_netdev(id_priv->id.device,
2537 id_priv->id.port_num);
2538 if (!ndev) {
2539 ret = -ENODEV;
2540 goto err2;
2541 }
2542 }
2543
2544 route->path_rec->net = &init_net;
2545 route->path_rec->ifindex = ndev->ifindex;
2546 supported_gids = roce_gid_type_mask_support(id_priv->id.device,
2547 id_priv->id.port_num);
2548 route->path_rec->gid_type =
2549 cma_route_gid_type(addr->dev_addr.network,
2550 supported_gids,
2551 id_priv->gid_type);
2552 }
2553 if (!ndev) {
2554 ret = -ENODEV;
2555 goto err2;
2556 }
2557
2558 memcpy(route->path_rec->dmac, addr->dev_addr.dst_dev_addr, ETH_ALEN);
2559
2560 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
2561 &route->path_rec->sgid);
2562 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.dst_addr,
2563 &route->path_rec->dgid);
2564
2565 /* Use the hint from IP Stack to select GID Type */
2566 if (route->path_rec->gid_type < ib_network_to_gid_type(addr->dev_addr.network))
2567 route->path_rec->gid_type = ib_network_to_gid_type(addr->dev_addr.network);
2568 if (((struct sockaddr *)&id_priv->id.route.addr.dst_addr)->sa_family != AF_IB)
2569 /* TODO: get the hoplimit from the inet/inet6 device */
2570 route->path_rec->hop_limit = addr->dev_addr.hoplimit;
2571 else
2572 route->path_rec->hop_limit = 1;
2573 route->path_rec->reversible = 1;
2574 route->path_rec->pkey = cpu_to_be16(0xffff);
2575 route->path_rec->mtu_selector = IB_SA_EQ;
2576 route->path_rec->sl = iboe_tos_to_sl(ndev, id_priv->tos);
2577 route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
2578 route->path_rec->rate_selector = IB_SA_EQ;
2579 route->path_rec->rate = iboe_get_rate(ndev);
2580 dev_put(ndev);
2581 route->path_rec->packet_life_time_selector = IB_SA_EQ;
2582 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
2583 if (!route->path_rec->mtu) {
2584 ret = -EINVAL;
2585 goto err2;
2586 }
2587
2588 work->old_state = RDMA_CM_ROUTE_QUERY;
2589 work->new_state = RDMA_CM_ROUTE_RESOLVED;
2590 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2591 work->event.status = 0;
2592
2593 queue_work(cma_wq, &work->work);
2594
2595 return 0;
2596
2597 err2:
2598 kfree(route->path_rec);
2599 route->path_rec = NULL;
2600 err1:
2601 kfree(work);
2602 return ret;
2603 }
2604
2605 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
2606 {
2607 struct rdma_id_private *id_priv;
2608 int ret;
2609
2610 id_priv = container_of(id, struct rdma_id_private, id);
2611 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
2612 return -EINVAL;
2613
2614 atomic_inc(&id_priv->refcount);
2615 if (rdma_cap_ib_sa(id->device, id->port_num))
2616 ret = cma_resolve_ib_route(id_priv, timeout_ms);
2617 else if (rdma_protocol_roce(id->device, id->port_num))
2618 ret = cma_resolve_iboe_route(id_priv);
2619 else if (rdma_protocol_iwarp(id->device, id->port_num))
2620 ret = cma_resolve_iw_route(id_priv, timeout_ms);
2621 else
2622 ret = -ENOSYS;
2623
2624 if (ret)
2625 goto err;
2626
2627 return 0;
2628 err:
2629 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
2630 cma_deref_id(id_priv);
2631 return ret;
2632 }
2633 EXPORT_SYMBOL(rdma_resolve_route);
2634
2635 static void cma_set_loopback(struct sockaddr *addr)
2636 {
2637 switch (addr->sa_family) {
2638 case AF_INET:
2639 ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
2640 break;
2641 case AF_INET6:
2642 ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr,
2643 0, 0, 0, htonl(1));
2644 break;
2645 default:
2646 ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr,
2647 0, 0, 0, htonl(1));
2648 break;
2649 }
2650 }
2651
2652 static int cma_bind_loopback(struct rdma_id_private *id_priv)
2653 {
2654 struct cma_device *cma_dev, *cur_dev;
2655 struct ib_port_attr port_attr;
2656 union ib_gid gid;
2657 u16 pkey;
2658 int ret;
2659 u8 p;
2660
2661 cma_dev = NULL;
2662 mutex_lock(&lock);
2663 list_for_each_entry(cur_dev, &dev_list, list) {
2664 if (cma_family(id_priv) == AF_IB &&
2665 !rdma_cap_ib_cm(cur_dev->device, 1))
2666 continue;
2667
2668 if (!cma_dev)
2669 cma_dev = cur_dev;
2670
2671 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
2672 if (!ib_query_port(cur_dev->device, p, &port_attr) &&
2673 port_attr.state == IB_PORT_ACTIVE) {
2674 cma_dev = cur_dev;
2675 goto port_found;
2676 }
2677 }
2678 }
2679
2680 if (!cma_dev) {
2681 ret = -ENODEV;
2682 goto out;
2683 }
2684
2685 p = 1;
2686
2687 port_found:
2688 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid, NULL);
2689 if (ret)
2690 goto out;
2691
2692 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
2693 if (ret)
2694 goto out;
2695
2696 id_priv->id.route.addr.dev_addr.dev_type =
2697 (rdma_protocol_ib(cma_dev->device, p)) ?
2698 ARPHRD_INFINIBAND : ARPHRD_ETHER;
2699
2700 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2701 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
2702 id_priv->id.port_num = p;
2703 cma_attach_to_dev(id_priv, cma_dev);
2704 cma_set_loopback(cma_src_addr(id_priv));
2705 out:
2706 mutex_unlock(&lock);
2707 return ret;
2708 }
2709
2710 static void addr_handler(int status, struct sockaddr *src_addr,
2711 struct rdma_dev_addr *dev_addr, void *context)
2712 {
2713 struct rdma_id_private *id_priv = context;
2714 struct rdma_cm_event event;
2715
2716 memset(&event, 0, sizeof event);
2717 mutex_lock(&id_priv->handler_mutex);
2718 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
2719 RDMA_CM_ADDR_RESOLVED))
2720 goto out;
2721
2722 memcpy(cma_src_addr(id_priv), src_addr, rdma_addr_size(src_addr));
2723 if (!status && !id_priv->cma_dev)
2724 status = cma_acquire_dev(id_priv, NULL);
2725
2726 if (status) {
2727 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2728 RDMA_CM_ADDR_BOUND))
2729 goto out;
2730 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2731 event.status = status;
2732 } else
2733 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2734
2735 if (id_priv->id.event_handler(&id_priv->id, &event)) {
2736 cma_exch(id_priv, RDMA_CM_DESTROYING);
2737 mutex_unlock(&id_priv->handler_mutex);
2738 cma_deref_id(id_priv);
2739 rdma_destroy_id(&id_priv->id);
2740 return;
2741 }
2742 out:
2743 mutex_unlock(&id_priv->handler_mutex);
2744 cma_deref_id(id_priv);
2745 }
2746
2747 static int cma_resolve_loopback(struct rdma_id_private *id_priv)
2748 {
2749 struct cma_work *work;
2750 union ib_gid gid;
2751 int ret;
2752
2753 work = kzalloc(sizeof *work, GFP_KERNEL);
2754 if (!work)
2755 return -ENOMEM;
2756
2757 if (!id_priv->cma_dev) {
2758 ret = cma_bind_loopback(id_priv);
2759 if (ret)
2760 goto err;
2761 }
2762
2763 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2764 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
2765
2766 work->id = id_priv;
2767 INIT_WORK(&work->work, cma_work_handler);
2768 work->old_state = RDMA_CM_ADDR_QUERY;
2769 work->new_state = RDMA_CM_ADDR_RESOLVED;
2770 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2771 queue_work(cma_wq, &work->work);
2772 return 0;
2773 err:
2774 kfree(work);
2775 return ret;
2776 }
2777
2778 static int cma_resolve_ib_addr(struct rdma_id_private *id_priv)
2779 {
2780 struct cma_work *work;
2781 int ret;
2782
2783 work = kzalloc(sizeof *work, GFP_KERNEL);
2784 if (!work)
2785 return -ENOMEM;
2786
2787 if (!id_priv->cma_dev) {
2788 ret = cma_resolve_ib_dev(id_priv);
2789 if (ret)
2790 goto err;
2791 }
2792
2793 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *)
2794 &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr));
2795
2796 work->id = id_priv;
2797 INIT_WORK(&work->work, cma_work_handler);
2798 work->old_state = RDMA_CM_ADDR_QUERY;
2799 work->new_state = RDMA_CM_ADDR_RESOLVED;
2800 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2801 queue_work(cma_wq, &work->work);
2802 return 0;
2803 err:
2804 kfree(work);
2805 return ret;
2806 }
2807
2808 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2809 struct sockaddr *dst_addr)
2810 {
2811 if (!src_addr || !src_addr->sa_family) {
2812 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
2813 src_addr->sa_family = dst_addr->sa_family;
2814 if (dst_addr->sa_family == AF_INET6) {
2815 struct sockaddr_in6 *src_addr6 = (struct sockaddr_in6 *) src_addr;
2816 struct sockaddr_in6 *dst_addr6 = (struct sockaddr_in6 *) dst_addr;
2817 src_addr6->sin6_scope_id = dst_addr6->sin6_scope_id;
2818 if (ipv6_addr_type(&dst_addr6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
2819 id->route.addr.dev_addr.bound_dev_if = dst_addr6->sin6_scope_id;
2820 } else if (dst_addr->sa_family == AF_IB) {
2821 ((struct sockaddr_ib *) src_addr)->sib_pkey =
2822 ((struct sockaddr_ib *) dst_addr)->sib_pkey;
2823 }
2824 }
2825 return rdma_bind_addr(id, src_addr);
2826 }
2827
2828 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2829 struct sockaddr *dst_addr, int timeout_ms)
2830 {
2831 struct rdma_id_private *id_priv;
2832 int ret;
2833
2834 id_priv = container_of(id, struct rdma_id_private, id);
2835 if (id_priv->state == RDMA_CM_IDLE) {
2836 ret = cma_bind_addr(id, src_addr, dst_addr);
2837 if (ret)
2838 return ret;
2839 }
2840
2841 if (cma_family(id_priv) != dst_addr->sa_family)
2842 return -EINVAL;
2843
2844 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY))
2845 return -EINVAL;
2846
2847 atomic_inc(&id_priv->refcount);
2848 memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr));
2849 if (cma_any_addr(dst_addr)) {
2850 ret = cma_resolve_loopback(id_priv);
2851 } else {
2852 if (dst_addr->sa_family == AF_IB) {
2853 ret = cma_resolve_ib_addr(id_priv);
2854 } else {
2855 ret = rdma_resolve_ip(&addr_client, cma_src_addr(id_priv),
2856 dst_addr, &id->route.addr.dev_addr,
2857 timeout_ms, addr_handler, id_priv);
2858 }
2859 }
2860 if (ret)
2861 goto err;
2862
2863 return 0;
2864 err:
2865 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
2866 cma_deref_id(id_priv);
2867 return ret;
2868 }
2869 EXPORT_SYMBOL(rdma_resolve_addr);
2870
2871 int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
2872 {
2873 struct rdma_id_private *id_priv;
2874 unsigned long flags;
2875 int ret;
2876
2877 id_priv = container_of(id, struct rdma_id_private, id);
2878 spin_lock_irqsave(&id_priv->lock, flags);
2879 if (reuse || id_priv->state == RDMA_CM_IDLE) {
2880 id_priv->reuseaddr = reuse;
2881 ret = 0;
2882 } else {
2883 ret = -EINVAL;
2884 }
2885 spin_unlock_irqrestore(&id_priv->lock, flags);
2886 return ret;
2887 }
2888 EXPORT_SYMBOL(rdma_set_reuseaddr);
2889
2890 int rdma_set_afonly(struct rdma_cm_id *id, int afonly)
2891 {
2892 struct rdma_id_private *id_priv;
2893 unsigned long flags;
2894 int ret;
2895
2896 id_priv = container_of(id, struct rdma_id_private, id);
2897 spin_lock_irqsave(&id_priv->lock, flags);
2898 if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) {
2899 id_priv->options |= (1 << CMA_OPTION_AFONLY);
2900 id_priv->afonly = afonly;
2901 ret = 0;
2902 } else {
2903 ret = -EINVAL;
2904 }
2905 spin_unlock_irqrestore(&id_priv->lock, flags);
2906 return ret;
2907 }
2908 EXPORT_SYMBOL(rdma_set_afonly);
2909
2910 static void cma_bind_port(struct rdma_bind_list *bind_list,
2911 struct rdma_id_private *id_priv)
2912 {
2913 struct sockaddr *addr;
2914 struct sockaddr_ib *sib;
2915 u64 sid, mask;
2916 __be16 port;
2917
2918 addr = cma_src_addr(id_priv);
2919 port = htons(bind_list->port);
2920
2921 switch (addr->sa_family) {
2922 case AF_INET:
2923 ((struct sockaddr_in *) addr)->sin_port = port;
2924 break;
2925 case AF_INET6:
2926 ((struct sockaddr_in6 *) addr)->sin6_port = port;
2927 break;
2928 case AF_IB:
2929 sib = (struct sockaddr_ib *) addr;
2930 sid = be64_to_cpu(sib->sib_sid);
2931 mask = be64_to_cpu(sib->sib_sid_mask);
2932 sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port));
2933 sib->sib_sid_mask = cpu_to_be64(~0ULL);
2934 break;
2935 }
2936 id_priv->bind_list = bind_list;
2937 hlist_add_head(&id_priv->node, &bind_list->owners);
2938 }
2939
2940 static int cma_alloc_port(enum rdma_port_space ps,
2941 struct rdma_id_private *id_priv, unsigned short snum)
2942 {
2943 struct rdma_bind_list *bind_list;
2944 int ret;
2945
2946 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
2947 if (!bind_list)
2948 return -ENOMEM;
2949
2950 ret = cma_ps_alloc(id_priv->id.route.addr.dev_addr.net, ps, bind_list,
2951 snum);
2952 if (ret < 0)
2953 goto err;
2954
2955 bind_list->ps = ps;
2956 bind_list->port = (unsigned short)ret;
2957 cma_bind_port(bind_list, id_priv);
2958 return 0;
2959 err:
2960 kfree(bind_list);
2961 return ret == -ENOSPC ? -EADDRNOTAVAIL : ret;
2962 }
2963
2964 static int cma_alloc_any_port(enum rdma_port_space ps,
2965 struct rdma_id_private *id_priv)
2966 {
2967 static unsigned int last_used_port;
2968 int low, high, remaining;
2969 unsigned int rover;
2970 struct net *net = id_priv->id.route.addr.dev_addr.net;
2971
2972 inet_get_local_port_range(net, &low, &high);
2973 remaining = (high - low) + 1;
2974 rover = prandom_u32() % remaining + low;
2975 retry:
2976 if (last_used_port != rover &&
2977 !cma_ps_find(net, ps, (unsigned short)rover)) {
2978 int ret = cma_alloc_port(ps, id_priv, rover);
2979 /*
2980 * Remember previously used port number in order to avoid
2981 * re-using same port immediately after it is closed.
2982 */
2983 if (!ret)
2984 last_used_port = rover;
2985 if (ret != -EADDRNOTAVAIL)
2986 return ret;
2987 }
2988 if (--remaining) {
2989 rover++;
2990 if ((rover < low) || (rover > high))
2991 rover = low;
2992 goto retry;
2993 }
2994 return -EADDRNOTAVAIL;
2995 }
2996
2997 /*
2998 * Check that the requested port is available. This is called when trying to
2999 * bind to a specific port, or when trying to listen on a bound port. In
3000 * the latter case, the provided id_priv may already be on the bind_list, but
3001 * we still need to check that it's okay to start listening.
3002 */
3003 static int cma_check_port(struct rdma_bind_list *bind_list,
3004 struct rdma_id_private *id_priv, uint8_t reuseaddr)
3005 {
3006 struct rdma_id_private *cur_id;
3007 struct sockaddr *addr, *cur_addr;
3008
3009 addr = cma_src_addr(id_priv);
3010 hlist_for_each_entry(cur_id, &bind_list->owners, node) {
3011 if (id_priv == cur_id)
3012 continue;
3013
3014 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr &&
3015 cur_id->reuseaddr)
3016 continue;
3017
3018 cur_addr = cma_src_addr(cur_id);
3019 if (id_priv->afonly && cur_id->afonly &&
3020 (addr->sa_family != cur_addr->sa_family))
3021 continue;
3022
3023 if (cma_any_addr(addr) || cma_any_addr(cur_addr))
3024 return -EADDRNOTAVAIL;
3025
3026 if (!cma_addr_cmp(addr, cur_addr))
3027 return -EADDRINUSE;
3028 }
3029 return 0;
3030 }
3031
3032 static int cma_use_port(enum rdma_port_space ps,
3033 struct rdma_id_private *id_priv)
3034 {
3035 struct rdma_bind_list *bind_list;
3036 unsigned short snum;
3037 int ret;
3038
3039 snum = ntohs(cma_port(cma_src_addr(id_priv)));
3040 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
3041 return -EACCES;
3042
3043 bind_list = cma_ps_find(id_priv->id.route.addr.dev_addr.net, ps, snum);
3044 if (!bind_list) {
3045 ret = cma_alloc_port(ps, id_priv, snum);
3046 } else {
3047 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
3048 if (!ret)
3049 cma_bind_port(bind_list, id_priv);
3050 }
3051 return ret;
3052 }
3053
3054 static int cma_bind_listen(struct rdma_id_private *id_priv)
3055 {
3056 struct rdma_bind_list *bind_list = id_priv->bind_list;
3057 int ret = 0;
3058
3059 mutex_lock(&lock);
3060 if (bind_list->owners.first->next)
3061 ret = cma_check_port(bind_list, id_priv, 0);
3062 mutex_unlock(&lock);
3063 return ret;
3064 }
3065
3066 static enum rdma_port_space cma_select_inet_ps(
3067 struct rdma_id_private *id_priv)
3068 {
3069 switch (id_priv->id.ps) {
3070 case RDMA_PS_TCP:
3071 case RDMA_PS_UDP:
3072 case RDMA_PS_IPOIB:
3073 case RDMA_PS_IB:
3074 return id_priv->id.ps;
3075 default:
3076
3077 return 0;
3078 }
3079 }
3080
3081 static enum rdma_port_space cma_select_ib_ps(struct rdma_id_private *id_priv)
3082 {
3083 enum rdma_port_space ps = 0;
3084 struct sockaddr_ib *sib;
3085 u64 sid_ps, mask, sid;
3086
3087 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
3088 mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK;
3089 sid = be64_to_cpu(sib->sib_sid) & mask;
3090
3091 if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) {
3092 sid_ps = RDMA_IB_IP_PS_IB;
3093 ps = RDMA_PS_IB;
3094 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) &&
3095 (sid == (RDMA_IB_IP_PS_TCP & mask))) {
3096 sid_ps = RDMA_IB_IP_PS_TCP;
3097 ps = RDMA_PS_TCP;
3098 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) &&
3099 (sid == (RDMA_IB_IP_PS_UDP & mask))) {
3100 sid_ps = RDMA_IB_IP_PS_UDP;
3101 ps = RDMA_PS_UDP;
3102 }
3103
3104 if (ps) {
3105 sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib)));
3106 sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK |
3107 be64_to_cpu(sib->sib_sid_mask));
3108 }
3109 return ps;
3110 }
3111
3112 static int cma_get_port(struct rdma_id_private *id_priv)
3113 {
3114 enum rdma_port_space ps;
3115 int ret;
3116
3117 if (cma_family(id_priv) != AF_IB)
3118 ps = cma_select_inet_ps(id_priv);
3119 else
3120 ps = cma_select_ib_ps(id_priv);
3121 if (!ps)
3122 return -EPROTONOSUPPORT;
3123
3124 mutex_lock(&lock);
3125 if (cma_any_port(cma_src_addr(id_priv)))
3126 ret = cma_alloc_any_port(ps, id_priv);
3127 else
3128 ret = cma_use_port(ps, id_priv);
3129 mutex_unlock(&lock);
3130
3131 return ret;
3132 }
3133
3134 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
3135 struct sockaddr *addr)
3136 {
3137 #if IS_ENABLED(CONFIG_IPV6)
3138 struct sockaddr_in6 *sin6;
3139
3140 if (addr->sa_family != AF_INET6)
3141 return 0;
3142
3143 sin6 = (struct sockaddr_in6 *) addr;
3144
3145 if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL))
3146 return 0;
3147
3148 if (!sin6->sin6_scope_id)
3149 return -EINVAL;
3150
3151 dev_addr->bound_dev_if = sin6->sin6_scope_id;
3152 #endif
3153 return 0;
3154 }
3155
3156 int rdma_listen(struct rdma_cm_id *id, int backlog)
3157 {
3158 struct rdma_id_private *id_priv;
3159 int ret;
3160
3161 id_priv = container_of(id, struct rdma_id_private, id);
3162 if (id_priv->state == RDMA_CM_IDLE) {
3163 id->route.addr.src_addr.ss_family = AF_INET;
3164 ret = rdma_bind_addr(id, cma_src_addr(id_priv));
3165 if (ret)
3166 return ret;
3167 }
3168
3169 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
3170 return -EINVAL;
3171
3172 if (id_priv->reuseaddr) {
3173 ret = cma_bind_listen(id_priv);
3174 if (ret)
3175 goto err;
3176 }
3177
3178 id_priv->backlog = backlog;
3179 if (id->device) {
3180 if (rdma_cap_ib_cm(id->device, 1)) {
3181 ret = cma_ib_listen(id_priv);
3182 if (ret)
3183 goto err;
3184 } else if (rdma_cap_iw_cm(id->device, 1)) {
3185 ret = cma_iw_listen(id_priv, backlog);
3186 if (ret)
3187 goto err;
3188 } else {
3189 ret = -ENOSYS;
3190 goto err;
3191 }
3192 } else
3193 cma_listen_on_all(id_priv);
3194
3195 return 0;
3196 err:
3197 id_priv->backlog = 0;
3198 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
3199 return ret;
3200 }
3201 EXPORT_SYMBOL(rdma_listen);
3202
3203 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
3204 {
3205 struct rdma_id_private *id_priv;
3206 int ret;
3207
3208 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 &&
3209 addr->sa_family != AF_IB)
3210 return -EAFNOSUPPORT;
3211
3212 id_priv = container_of(id, struct rdma_id_private, id);
3213 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
3214 return -EINVAL;
3215
3216 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
3217 if (ret)
3218 goto err1;
3219
3220 memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr));
3221 if (!cma_any_addr(addr)) {
3222 ret = cma_translate_addr(addr, &id->route.addr.dev_addr);
3223 if (ret)
3224 goto err1;
3225
3226 ret = cma_acquire_dev(id_priv, NULL);
3227 if (ret)
3228 goto err1;
3229 }
3230
3231 if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) {
3232 if (addr->sa_family == AF_INET)
3233 id_priv->afonly = 1;
3234 #if IS_ENABLED(CONFIG_IPV6)
3235 else if (addr->sa_family == AF_INET6) {
3236 struct net *net = id_priv->id.route.addr.dev_addr.net;
3237
3238 id_priv->afonly = net->ipv6.sysctl.bindv6only;
3239 }
3240 #endif
3241 }
3242 ret = cma_get_port(id_priv);
3243 if (ret)
3244 goto err2;
3245
3246 return 0;
3247 err2:
3248 if (id_priv->cma_dev)
3249 cma_release_dev(id_priv);
3250 err1:
3251 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
3252 return ret;
3253 }
3254 EXPORT_SYMBOL(rdma_bind_addr);
3255
3256 static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv)
3257 {
3258 struct cma_hdr *cma_hdr;
3259
3260 cma_hdr = hdr;
3261 cma_hdr->cma_version = CMA_VERSION;
3262 if (cma_family(id_priv) == AF_INET) {
3263 struct sockaddr_in *src4, *dst4;
3264
3265 src4 = (struct sockaddr_in *) cma_src_addr(id_priv);
3266 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv);
3267
3268 cma_set_ip_ver(cma_hdr, 4);
3269 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
3270 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
3271 cma_hdr->port = src4->sin_port;
3272 } else if (cma_family(id_priv) == AF_INET6) {
3273 struct sockaddr_in6 *src6, *dst6;
3274
3275 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
3276 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv);
3277
3278 cma_set_ip_ver(cma_hdr, 6);
3279 cma_hdr->src_addr.ip6 = src6->sin6_addr;
3280 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
3281 cma_hdr->port = src6->sin6_port;
3282 }
3283 return 0;
3284 }
3285
3286 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
3287 struct ib_cm_event *ib_event)
3288 {
3289 struct rdma_id_private *id_priv = cm_id->context;
3290 struct rdma_cm_event event;
3291 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
3292 int ret = 0;
3293
3294 mutex_lock(&id_priv->handler_mutex);
3295 if (id_priv->state != RDMA_CM_CONNECT)
3296 goto out;
3297
3298 memset(&event, 0, sizeof event);
3299 switch (ib_event->event) {
3300 case IB_CM_SIDR_REQ_ERROR:
3301 event.event = RDMA_CM_EVENT_UNREACHABLE;
3302 event.status = -ETIMEDOUT;
3303 break;
3304 case IB_CM_SIDR_REP_RECEIVED:
3305 event.param.ud.private_data = ib_event->private_data;
3306 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
3307 if (rep->status != IB_SIDR_SUCCESS) {
3308 event.event = RDMA_CM_EVENT_UNREACHABLE;
3309 event.status = ib_event->param.sidr_rep_rcvd.status;
3310 break;
3311 }
3312 ret = cma_set_qkey(id_priv, rep->qkey);
3313 if (ret) {
3314 event.event = RDMA_CM_EVENT_ADDR_ERROR;
3315 event.status = ret;
3316 break;
3317 }
3318 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
3319 id_priv->id.route.path_rec,
3320 &event.param.ud.ah_attr);
3321 event.param.ud.qp_num = rep->qpn;
3322 event.param.ud.qkey = rep->qkey;
3323 event.event = RDMA_CM_EVENT_ESTABLISHED;
3324 event.status = 0;
3325 break;
3326 default:
3327 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
3328 ib_event->event);
3329 goto out;
3330 }
3331
3332 ret = id_priv->id.event_handler(&id_priv->id, &event);
3333 if (ret) {
3334 /* Destroy the CM ID by returning a non-zero value. */
3335 id_priv->cm_id.ib = NULL;
3336 cma_exch(id_priv, RDMA_CM_DESTROYING);
3337 mutex_unlock(&id_priv->handler_mutex);
3338 rdma_destroy_id(&id_priv->id);
3339 return ret;
3340 }
3341 out:
3342 mutex_unlock(&id_priv->handler_mutex);
3343 return ret;
3344 }
3345
3346 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
3347 struct rdma_conn_param *conn_param)
3348 {
3349 struct ib_cm_sidr_req_param req;
3350 struct ib_cm_id *id;
3351 void *private_data;
3352 int offset, ret;
3353
3354 memset(&req, 0, sizeof req);
3355 offset = cma_user_data_offset(id_priv);
3356 req.private_data_len = offset + conn_param->private_data_len;
3357 if (req.private_data_len < conn_param->private_data_len)
3358 return -EINVAL;
3359
3360 if (req.private_data_len) {
3361 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3362 if (!private_data)
3363 return -ENOMEM;
3364 } else {
3365 private_data = NULL;
3366 }
3367
3368 if (conn_param->private_data && conn_param->private_data_len)
3369 memcpy(private_data + offset, conn_param->private_data,
3370 conn_param->private_data_len);
3371
3372 if (private_data) {
3373 ret = cma_format_hdr(private_data, id_priv);
3374 if (ret)
3375 goto out;
3376 req.private_data = private_data;
3377 }
3378
3379 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
3380 id_priv);
3381 if (IS_ERR(id)) {
3382 ret = PTR_ERR(id);
3383 goto out;
3384 }
3385 id_priv->cm_id.ib = id;
3386
3387 req.path = id_priv->id.route.path_rec;
3388 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
3389 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
3390 req.max_cm_retries = CMA_MAX_CM_RETRIES;
3391
3392 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
3393 if (ret) {
3394 ib_destroy_cm_id(id_priv->cm_id.ib);
3395 id_priv->cm_id.ib = NULL;
3396 }
3397 out:
3398 kfree(private_data);
3399 return ret;
3400 }
3401
3402 static int cma_connect_ib(struct rdma_id_private *id_priv,
3403 struct rdma_conn_param *conn_param)
3404 {
3405 struct ib_cm_req_param req;
3406 struct rdma_route *route;
3407 void *private_data;
3408 struct ib_cm_id *id;
3409 int offset, ret;
3410
3411 memset(&req, 0, sizeof req);
3412 offset = cma_user_data_offset(id_priv);
3413 req.private_data_len = offset + conn_param->private_data_len;
3414 if (req.private_data_len < conn_param->private_data_len)
3415 return -EINVAL;
3416
3417 if (req.private_data_len) {
3418 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3419 if (!private_data)
3420 return -ENOMEM;
3421 } else {
3422 private_data = NULL;
3423 }
3424
3425 if (conn_param->private_data && conn_param->private_data_len)
3426 memcpy(private_data + offset, conn_param->private_data,
3427 conn_param->private_data_len);
3428
3429 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
3430 if (IS_ERR(id)) {
3431 ret = PTR_ERR(id);
3432 goto out;
3433 }
3434 id_priv->cm_id.ib = id;
3435
3436 route = &id_priv->id.route;
3437 if (private_data) {
3438 ret = cma_format_hdr(private_data, id_priv);
3439 if (ret)
3440 goto out;
3441 req.private_data = private_data;
3442 }
3443
3444 req.primary_path = &route->path_rec[0];
3445 if (route->num_paths == 2)
3446 req.alternate_path = &route->path_rec[1];
3447
3448 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
3449 req.qp_num = id_priv->qp_num;
3450 req.qp_type = id_priv->id.qp_type;
3451 req.starting_psn = id_priv->seq_num;
3452 req.responder_resources = conn_param->responder_resources;
3453 req.initiator_depth = conn_param->initiator_depth;
3454 req.flow_control = conn_param->flow_control;
3455 req.retry_count = min_t(u8, 7, conn_param->retry_count);
3456 req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
3457 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3458 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3459 req.max_cm_retries = CMA_MAX_CM_RETRIES;
3460 req.srq = id_priv->srq ? 1 : 0;
3461
3462 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
3463 out:
3464 if (ret && !IS_ERR(id)) {
3465 ib_destroy_cm_id(id);
3466 id_priv->cm_id.ib = NULL;
3467 }
3468
3469 kfree(private_data);
3470 return ret;
3471 }
3472
3473 static int cma_connect_iw(struct rdma_id_private *id_priv,
3474 struct rdma_conn_param *conn_param)
3475 {
3476 struct iw_cm_id *cm_id;
3477 int ret;
3478 struct iw_cm_conn_param iw_param;
3479
3480 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
3481 if (IS_ERR(cm_id))
3482 return PTR_ERR(cm_id);
3483
3484 cm_id->tos = id_priv->tos;
3485 id_priv->cm_id.iw = cm_id;
3486
3487 memcpy(&cm_id->local_addr, cma_src_addr(id_priv),
3488 rdma_addr_size(cma_src_addr(id_priv)));
3489 memcpy(&cm_id->remote_addr, cma_dst_addr(id_priv),
3490 rdma_addr_size(cma_dst_addr(id_priv)));
3491
3492 ret = cma_modify_qp_rtr(id_priv, conn_param);
3493 if (ret)
3494 goto out;
3495
3496 if (conn_param) {
3497 iw_param.ord = conn_param->initiator_depth;
3498 iw_param.ird = conn_param->responder_resources;
3499 iw_param.private_data = conn_param->private_data;
3500 iw_param.private_data_len = conn_param->private_data_len;
3501 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
3502 } else {
3503 memset(&iw_param, 0, sizeof iw_param);
3504 iw_param.qpn = id_priv->qp_num;
3505 }
3506 ret = iw_cm_connect(cm_id, &iw_param);
3507 out:
3508 if (ret) {
3509 iw_destroy_cm_id(cm_id);
3510 id_priv->cm_id.iw = NULL;
3511 }
3512 return ret;
3513 }
3514
3515 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
3516 {
3517 struct rdma_id_private *id_priv;
3518 int ret;
3519
3520 id_priv = container_of(id, struct rdma_id_private, id);
3521 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
3522 return -EINVAL;
3523
3524 if (!id->qp) {
3525 id_priv->qp_num = conn_param->qp_num;
3526 id_priv->srq = conn_param->srq;
3527 }
3528
3529 if (rdma_cap_ib_cm(id->device, id->port_num)) {
3530 if (id->qp_type == IB_QPT_UD)
3531 ret = cma_resolve_ib_udp(id_priv, conn_param);
3532 else
3533 ret = cma_connect_ib(id_priv, conn_param);
3534 } else if (rdma_cap_iw_cm(id->device, id->port_num))
3535 ret = cma_connect_iw(id_priv, conn_param);
3536 else
3537 ret = -ENOSYS;
3538 if (ret)
3539 goto err;
3540
3541 return 0;
3542 err:
3543 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
3544 return ret;
3545 }
3546 EXPORT_SYMBOL(rdma_connect);
3547
3548 static int cma_accept_ib(struct rdma_id_private *id_priv,
3549 struct rdma_conn_param *conn_param)
3550 {
3551 struct ib_cm_rep_param rep;
3552 int ret;
3553
3554 ret = cma_modify_qp_rtr(id_priv, conn_param);
3555 if (ret)
3556 goto out;
3557
3558 ret = cma_modify_qp_rts(id_priv, conn_param);
3559 if (ret)
3560 goto out;
3561
3562 memset(&rep, 0, sizeof rep);
3563 rep.qp_num = id_priv->qp_num;
3564 rep.starting_psn = id_priv->seq_num;
3565 rep.private_data = conn_param->private_data;
3566 rep.private_data_len = conn_param->private_data_len;
3567 rep.responder_resources = conn_param->responder_resources;
3568 rep.initiator_depth = conn_param->initiator_depth;
3569 rep.failover_accepted = 0;
3570 rep.flow_control = conn_param->flow_control;
3571 rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
3572 rep.srq = id_priv->srq ? 1 : 0;
3573
3574 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
3575 out:
3576 return ret;
3577 }
3578
3579 static int cma_accept_iw(struct rdma_id_private *id_priv,
3580 struct rdma_conn_param *conn_param)
3581 {
3582 struct iw_cm_conn_param iw_param;
3583 int ret;
3584
3585 ret = cma_modify_qp_rtr(id_priv, conn_param);
3586 if (ret)
3587 return ret;
3588
3589 iw_param.ord = conn_param->initiator_depth;
3590 iw_param.ird = conn_param->responder_resources;
3591 iw_param.private_data = conn_param->private_data;
3592 iw_param.private_data_len = conn_param->private_data_len;
3593 if (id_priv->id.qp) {
3594 iw_param.qpn = id_priv->qp_num;
3595 } else
3596 iw_param.qpn = conn_param->qp_num;
3597
3598 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
3599 }
3600
3601 static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
3602 enum ib_cm_sidr_status status, u32 qkey,
3603 const void *private_data, int private_data_len)
3604 {
3605 struct ib_cm_sidr_rep_param rep;
3606 int ret;
3607
3608 memset(&rep, 0, sizeof rep);
3609 rep.status = status;
3610 if (status == IB_SIDR_SUCCESS) {
3611 ret = cma_set_qkey(id_priv, qkey);
3612 if (ret)
3613 return ret;
3614 rep.qp_num = id_priv->qp_num;
3615 rep.qkey = id_priv->qkey;
3616 }
3617 rep.private_data = private_data;
3618 rep.private_data_len = private_data_len;
3619
3620 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
3621 }
3622
3623 int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
3624 {
3625 struct rdma_id_private *id_priv;
3626 int ret;
3627
3628 id_priv = container_of(id, struct rdma_id_private, id);
3629
3630 id_priv->owner = task_pid_nr(current);
3631
3632 if (!cma_comp(id_priv, RDMA_CM_CONNECT))
3633 return -EINVAL;
3634
3635 if (!id->qp && conn_param) {
3636 id_priv->qp_num = conn_param->qp_num;
3637 id_priv->srq = conn_param->srq;
3638 }
3639
3640 if (rdma_cap_ib_cm(id->device, id->port_num)) {
3641 if (id->qp_type == IB_QPT_UD) {
3642 if (conn_param)
3643 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
3644 conn_param->qkey,
3645 conn_param->private_data,
3646 conn_param->private_data_len);
3647 else
3648 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
3649 0, NULL, 0);
3650 } else {
3651 if (conn_param)
3652 ret = cma_accept_ib(id_priv, conn_param);
3653 else
3654 ret = cma_rep_recv(id_priv);
3655 }
3656 } else if (rdma_cap_iw_cm(id->device, id->port_num))
3657 ret = cma_accept_iw(id_priv, conn_param);
3658 else
3659 ret = -ENOSYS;
3660
3661 if (ret)
3662 goto reject;
3663
3664 return 0;
3665 reject:
3666 cma_modify_qp_err(id_priv);
3667 rdma_reject(id, NULL, 0);
3668 return ret;
3669 }
3670 EXPORT_SYMBOL(rdma_accept);
3671
3672 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
3673 {
3674 struct rdma_id_private *id_priv;
3675 int ret;
3676
3677 id_priv = container_of(id, struct rdma_id_private, id);
3678 if (!id_priv->cm_id.ib)
3679 return -EINVAL;
3680
3681 switch (id->device->node_type) {
3682 case RDMA_NODE_IB_CA:
3683 ret = ib_cm_notify(id_priv->cm_id.ib, event);
3684 break;
3685 default:
3686 ret = 0;
3687 break;
3688 }
3689 return ret;
3690 }
3691 EXPORT_SYMBOL(rdma_notify);
3692
3693 int rdma_reject(struct rdma_cm_id *id, const void *private_data,
3694 u8 private_data_len)
3695 {
3696 struct rdma_id_private *id_priv;
3697 int ret;
3698
3699 id_priv = container_of(id, struct rdma_id_private, id);
3700 if (!id_priv->cm_id.ib)
3701 return -EINVAL;
3702
3703 if (rdma_cap_ib_cm(id->device, id->port_num)) {
3704 if (id->qp_type == IB_QPT_UD)
3705 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0,
3706 private_data, private_data_len);
3707 else
3708 ret = ib_send_cm_rej(id_priv->cm_id.ib,
3709 IB_CM_REJ_CONSUMER_DEFINED, NULL,
3710 0, private_data, private_data_len);
3711 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
3712 ret = iw_cm_reject(id_priv->cm_id.iw,
3713 private_data, private_data_len);
3714 } else
3715 ret = -ENOSYS;
3716
3717 return ret;
3718 }
3719 EXPORT_SYMBOL(rdma_reject);
3720
3721 int rdma_disconnect(struct rdma_cm_id *id)
3722 {
3723 struct rdma_id_private *id_priv;
3724 int ret;
3725
3726 id_priv = container_of(id, struct rdma_id_private, id);
3727 if (!id_priv->cm_id.ib)
3728 return -EINVAL;
3729
3730 if (rdma_cap_ib_cm(id->device, id->port_num)) {
3731 ret = cma_modify_qp_err(id_priv);
3732 if (ret)
3733 goto out;
3734 /* Initiate or respond to a disconnect. */
3735 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
3736 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
3737 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
3738 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
3739 } else
3740 ret = -EINVAL;
3741
3742 out:
3743 return ret;
3744 }
3745 EXPORT_SYMBOL(rdma_disconnect);
3746
3747 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
3748 {
3749 struct rdma_id_private *id_priv;
3750 struct cma_multicast *mc = multicast->context;
3751 struct rdma_cm_event event;
3752 int ret = 0;
3753
3754 id_priv = mc->id_priv;
3755 mutex_lock(&id_priv->handler_mutex);
3756 if (id_priv->state != RDMA_CM_ADDR_BOUND &&
3757 id_priv->state != RDMA_CM_ADDR_RESOLVED)
3758 goto out;
3759
3760 if (!status)
3761 status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey));
3762 mutex_lock(&id_priv->qp_mutex);
3763 if (!status && id_priv->id.qp)
3764 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
3765 be16_to_cpu(multicast->rec.mlid));
3766 mutex_unlock(&id_priv->qp_mutex);
3767
3768 memset(&event, 0, sizeof event);
3769 event.status = status;
3770 event.param.ud.private_data = mc->context;
3771 if (!status) {
3772 struct rdma_dev_addr *dev_addr =
3773 &id_priv->id.route.addr.dev_addr;
3774 struct net_device *ndev =
3775 dev_get_by_index(&init_net, dev_addr->bound_dev_if);
3776 enum ib_gid_type gid_type =
3777 id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
3778 rdma_start_port(id_priv->cma_dev->device)];
3779
3780 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
3781 ib_init_ah_from_mcmember(id_priv->id.device,
3782 id_priv->id.port_num, &multicast->rec,
3783 ndev, gid_type,
3784 &event.param.ud.ah_attr);
3785 event.param.ud.qp_num = 0xFFFFFF;
3786 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
3787 if (ndev)
3788 dev_put(ndev);
3789 } else
3790 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
3791
3792 ret = id_priv->id.event_handler(&id_priv->id, &event);
3793 if (ret) {
3794 cma_exch(id_priv, RDMA_CM_DESTROYING);
3795 mutex_unlock(&id_priv->handler_mutex);
3796 rdma_destroy_id(&id_priv->id);
3797 return 0;
3798 }
3799
3800 out:
3801 mutex_unlock(&id_priv->handler_mutex);
3802 return 0;
3803 }
3804
3805 static void cma_set_mgid(struct rdma_id_private *id_priv,
3806 struct sockaddr *addr, union ib_gid *mgid)
3807 {
3808 unsigned char mc_map[MAX_ADDR_LEN];
3809 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3810 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
3811 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
3812
3813 if (cma_any_addr(addr)) {
3814 memset(mgid, 0, sizeof *mgid);
3815 } else if ((addr->sa_family == AF_INET6) &&
3816 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
3817 0xFF10A01B)) {
3818 /* IPv6 address is an SA assigned MGID. */
3819 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3820 } else if (addr->sa_family == AF_IB) {
3821 memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid);
3822 } else if ((addr->sa_family == AF_INET6)) {
3823 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
3824 if (id_priv->id.ps == RDMA_PS_UDP)
3825 mc_map[7] = 0x01; /* Use RDMA CM signature */
3826 *mgid = *(union ib_gid *) (mc_map + 4);
3827 } else {
3828 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
3829 if (id_priv->id.ps == RDMA_PS_UDP)
3830 mc_map[7] = 0x01; /* Use RDMA CM signature */
3831 *mgid = *(union ib_gid *) (mc_map + 4);
3832 }
3833 }
3834
3835 static void cma_query_sa_classport_info_cb(int status,
3836 struct ib_class_port_info *rec,
3837 void *context)
3838 {
3839 struct class_port_info_context *cb_ctx = context;
3840
3841 WARN_ON(!context);
3842
3843 if (status || !rec) {
3844 pr_debug("RDMA CM: %s port %u failed query ClassPortInfo status: %d\n",
3845 cb_ctx->device->name, cb_ctx->port_num, status);
3846 goto out;
3847 }
3848
3849 memcpy(cb_ctx->class_port_info, rec, sizeof(struct ib_class_port_info));
3850
3851 out:
3852 complete(&cb_ctx->done);
3853 }
3854
3855 static int cma_query_sa_classport_info(struct ib_device *device, u8 port_num,
3856 struct ib_class_port_info *class_port_info)
3857 {
3858 struct class_port_info_context *cb_ctx;
3859 int ret;
3860
3861 cb_ctx = kmalloc(sizeof(*cb_ctx), GFP_KERNEL);
3862 if (!cb_ctx)
3863 return -ENOMEM;
3864
3865 cb_ctx->device = device;
3866 cb_ctx->class_port_info = class_port_info;
3867 cb_ctx->port_num = port_num;
3868 init_completion(&cb_ctx->done);
3869
3870 ret = ib_sa_classport_info_rec_query(&sa_client, device, port_num,
3871 CMA_QUERY_CLASSPORT_INFO_TIMEOUT,
3872 GFP_KERNEL, cma_query_sa_classport_info_cb,
3873 cb_ctx, &cb_ctx->sa_query);
3874 if (ret < 0) {
3875 pr_err("RDMA CM: %s port %u failed to send ClassPortInfo query, ret: %d\n",
3876 device->name, port_num, ret);
3877 goto out;
3878 }
3879
3880 wait_for_completion(&cb_ctx->done);
3881
3882 out:
3883 kfree(cb_ctx);
3884 return ret;
3885 }
3886
3887 static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
3888 struct cma_multicast *mc)
3889 {
3890 struct ib_sa_mcmember_rec rec;
3891 struct ib_class_port_info class_port_info;
3892 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3893 ib_sa_comp_mask comp_mask;
3894 int ret;
3895
3896 ib_addr_get_mgid(dev_addr, &rec.mgid);
3897 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
3898 &rec.mgid, &rec);
3899 if (ret)
3900 return ret;
3901
3902 ret = cma_set_qkey(id_priv, 0);
3903 if (ret)
3904 return ret;
3905
3906 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
3907 rec.qkey = cpu_to_be32(id_priv->qkey);
3908 rdma_addr_get_sgid(dev_addr, &rec.port_gid);
3909 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
3910 rec.join_state = mc->join_state;
3911
3912 if (rec.join_state == BIT(SENDONLY_FULLMEMBER_JOIN)) {
3913 ret = cma_query_sa_classport_info(id_priv->id.device,
3914 id_priv->id.port_num,
3915 &class_port_info);
3916
3917 if (ret)
3918 return ret;
3919
3920 if (!(ib_get_cpi_capmask2(&class_port_info) &
3921 IB_SA_CAP_MASK2_SENDONLY_FULL_MEM_SUPPORT)) {
3922 pr_warn("RDMA CM: %s port %u Unable to multicast join\n"
3923 "RDMA CM: SM doesn't support Send Only Full Member option\n",
3924 id_priv->id.device->name, id_priv->id.port_num);
3925 return -EOPNOTSUPP;
3926 }
3927 }
3928
3929 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
3930 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
3931 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
3932 IB_SA_MCMEMBER_REC_FLOW_LABEL |
3933 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
3934
3935 if (id_priv->id.ps == RDMA_PS_IPOIB)
3936 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
3937 IB_SA_MCMEMBER_REC_RATE_SELECTOR |
3938 IB_SA_MCMEMBER_REC_MTU_SELECTOR |
3939 IB_SA_MCMEMBER_REC_MTU |
3940 IB_SA_MCMEMBER_REC_HOP_LIMIT;
3941
3942 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
3943 id_priv->id.port_num, &rec,
3944 comp_mask, GFP_KERNEL,
3945 cma_ib_mc_handler, mc);
3946 return PTR_ERR_OR_ZERO(mc->multicast.ib);
3947 }
3948
3949 static void iboe_mcast_work_handler(struct work_struct *work)
3950 {
3951 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
3952 struct cma_multicast *mc = mw->mc;
3953 struct ib_sa_multicast *m = mc->multicast.ib;
3954
3955 mc->multicast.ib->context = mc;
3956 cma_ib_mc_handler(0, m);
3957 kref_put(&mc->mcref, release_mc);
3958 kfree(mw);
3959 }
3960
3961 static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid)
3962 {
3963 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
3964 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
3965
3966 if (cma_any_addr(addr)) {
3967 memset(mgid, 0, sizeof *mgid);
3968 } else if (addr->sa_family == AF_INET6) {
3969 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3970 } else {
3971 mgid->raw[0] = 0xff;
3972 mgid->raw[1] = 0x0e;
3973 mgid->raw[2] = 0;
3974 mgid->raw[3] = 0;
3975 mgid->raw[4] = 0;
3976 mgid->raw[5] = 0;
3977 mgid->raw[6] = 0;
3978 mgid->raw[7] = 0;
3979 mgid->raw[8] = 0;
3980 mgid->raw[9] = 0;
3981 mgid->raw[10] = 0xff;
3982 mgid->raw[11] = 0xff;
3983 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
3984 }
3985 }
3986
3987 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
3988 struct cma_multicast *mc)
3989 {
3990 struct iboe_mcast_work *work;
3991 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3992 int err = 0;
3993 struct sockaddr *addr = (struct sockaddr *)&mc->addr;
3994 struct net_device *ndev = NULL;
3995 enum ib_gid_type gid_type;
3996 bool send_only;
3997
3998 send_only = mc->join_state == BIT(SENDONLY_FULLMEMBER_JOIN);
3999
4000 if (cma_zero_addr((struct sockaddr *)&mc->addr))
4001 return -EINVAL;
4002
4003 work = kzalloc(sizeof *work, GFP_KERNEL);
4004 if (!work)
4005 return -ENOMEM;
4006
4007 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
4008 if (!mc->multicast.ib) {
4009 err = -ENOMEM;
4010 goto out1;
4011 }
4012
4013 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid);
4014
4015 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
4016 if (id_priv->id.ps == RDMA_PS_UDP)
4017 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
4018
4019 if (dev_addr->bound_dev_if)
4020 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
4021 if (!ndev) {
4022 err = -ENODEV;
4023 goto out2;
4024 }
4025 mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
4026 mc->multicast.ib->rec.hop_limit = 1;
4027 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
4028
4029 gid_type = id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
4030 rdma_start_port(id_priv->cma_dev->device)];
4031 if (addr->sa_family == AF_INET) {
4032 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) {
4033 mc->multicast.ib->rec.hop_limit = IPV6_DEFAULT_HOPLIMIT;
4034 if (!send_only) {
4035 err = cma_igmp_send(ndev, &mc->multicast.ib->rec.mgid,
4036 true);
4037 if (!err)
4038 mc->igmp_joined = true;
4039 }
4040 }
4041 } else {
4042 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP)
4043 err = -ENOTSUPP;
4044 }
4045 dev_put(ndev);
4046 if (err || !mc->multicast.ib->rec.mtu) {
4047 if (!err)
4048 err = -EINVAL;
4049 goto out2;
4050 }
4051 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
4052 &mc->multicast.ib->rec.port_gid);
4053 work->id = id_priv;
4054 work->mc = mc;
4055 INIT_WORK(&work->work, iboe_mcast_work_handler);
4056 kref_get(&mc->mcref);
4057 queue_work(cma_wq, &work->work);
4058
4059 return 0;
4060
4061 out2:
4062 kfree(mc->multicast.ib);
4063 out1:
4064 kfree(work);
4065 return err;
4066 }
4067
4068 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
4069 u8 join_state, void *context)
4070 {
4071 struct rdma_id_private *id_priv;
4072 struct cma_multicast *mc;
4073 int ret;
4074
4075 id_priv = container_of(id, struct rdma_id_private, id);
4076 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
4077 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
4078 return -EINVAL;
4079
4080 mc = kmalloc(sizeof *mc, GFP_KERNEL);
4081 if (!mc)
4082 return -ENOMEM;
4083
4084 memcpy(&mc->addr, addr, rdma_addr_size(addr));
4085 mc->context = context;
4086 mc->id_priv = id_priv;
4087 mc->igmp_joined = false;
4088 mc->join_state = join_state;
4089 spin_lock(&id_priv->lock);
4090 list_add(&mc->list, &id_priv->mc_list);
4091 spin_unlock(&id_priv->lock);
4092
4093 if (rdma_protocol_roce(id->device, id->port_num)) {
4094 kref_init(&mc->mcref);
4095 ret = cma_iboe_join_multicast(id_priv, mc);
4096 } else if (rdma_cap_ib_mcast(id->device, id->port_num))
4097 ret = cma_join_ib_multicast(id_priv, mc);
4098 else
4099 ret = -ENOSYS;
4100
4101 if (ret) {
4102 spin_lock_irq(&id_priv->lock);
4103 list_del(&mc->list);
4104 spin_unlock_irq(&id_priv->lock);
4105 kfree(mc);
4106 }
4107 return ret;
4108 }
4109 EXPORT_SYMBOL(rdma_join_multicast);
4110
4111 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
4112 {
4113 struct rdma_id_private *id_priv;
4114 struct cma_multicast *mc;
4115
4116 id_priv = container_of(id, struct rdma_id_private, id);
4117 spin_lock_irq(&id_priv->lock);
4118 list_for_each_entry(mc, &id_priv->mc_list, list) {
4119 if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) {
4120 list_del(&mc->list);
4121 spin_unlock_irq(&id_priv->lock);
4122
4123 if (id->qp)
4124 ib_detach_mcast(id->qp,
4125 &mc->multicast.ib->rec.mgid,
4126 be16_to_cpu(mc->multicast.ib->rec.mlid));
4127
4128 BUG_ON(id_priv->cma_dev->device != id->device);
4129
4130 if (rdma_cap_ib_mcast(id->device, id->port_num)) {
4131 ib_sa_free_multicast(mc->multicast.ib);
4132 kfree(mc);
4133 } else if (rdma_protocol_roce(id->device, id->port_num)) {
4134 if (mc->igmp_joined) {
4135 struct rdma_dev_addr *dev_addr =
4136 &id->route.addr.dev_addr;
4137 struct net_device *ndev = NULL;
4138
4139 if (dev_addr->bound_dev_if)
4140 ndev = dev_get_by_index(&init_net,
4141 dev_addr->bound_dev_if);
4142 if (ndev) {
4143 cma_igmp_send(ndev,
4144 &mc->multicast.ib->rec.mgid,
4145 false);
4146 dev_put(ndev);
4147 }
4148 mc->igmp_joined = false;
4149 }
4150 kref_put(&mc->mcref, release_mc);
4151 }
4152 return;
4153 }
4154 }
4155 spin_unlock_irq(&id_priv->lock);
4156 }
4157 EXPORT_SYMBOL(rdma_leave_multicast);
4158
4159 static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
4160 {
4161 struct rdma_dev_addr *dev_addr;
4162 struct cma_ndev_work *work;
4163
4164 dev_addr = &id_priv->id.route.addr.dev_addr;
4165
4166 if ((dev_addr->bound_dev_if == ndev->ifindex) &&
4167 (net_eq(dev_net(ndev), dev_addr->net)) &&
4168 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
4169 pr_info("RDMA CM addr change for ndev %s used by id %p\n",
4170 ndev->name, &id_priv->id);
4171 work = kzalloc(sizeof *work, GFP_KERNEL);
4172 if (!work)
4173 return -ENOMEM;
4174
4175 INIT_WORK(&work->work, cma_ndev_work_handler);
4176 work->id = id_priv;
4177 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
4178 atomic_inc(&id_priv->refcount);
4179 queue_work(cma_wq, &work->work);
4180 }
4181
4182 return 0;
4183 }
4184
4185 static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
4186 void *ptr)
4187 {
4188 struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
4189 struct cma_device *cma_dev;
4190 struct rdma_id_private *id_priv;
4191 int ret = NOTIFY_DONE;
4192
4193 if (event != NETDEV_BONDING_FAILOVER)
4194 return NOTIFY_DONE;
4195
4196 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
4197 return NOTIFY_DONE;
4198
4199 mutex_lock(&lock);
4200 list_for_each_entry(cma_dev, &dev_list, list)
4201 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
4202 ret = cma_netdev_change(ndev, id_priv);
4203 if (ret)
4204 goto out;
4205 }
4206
4207 out:
4208 mutex_unlock(&lock);
4209 return ret;
4210 }
4211
4212 static struct notifier_block cma_nb = {
4213 .notifier_call = cma_netdev_callback
4214 };
4215
4216 static void cma_add_one(struct ib_device *device)
4217 {
4218 struct cma_device *cma_dev;
4219 struct rdma_id_private *id_priv;
4220 unsigned int i;
4221 unsigned long supported_gids = 0;
4222
4223 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
4224 if (!cma_dev)
4225 return;
4226
4227 cma_dev->device = device;
4228 cma_dev->default_gid_type = kcalloc(device->phys_port_cnt,
4229 sizeof(*cma_dev->default_gid_type),
4230 GFP_KERNEL);
4231 if (!cma_dev->default_gid_type) {
4232 kfree(cma_dev);
4233 return;
4234 }
4235 for (i = rdma_start_port(device); i <= rdma_end_port(device); i++) {
4236 supported_gids = roce_gid_type_mask_support(device, i);
4237 WARN_ON(!supported_gids);
4238 cma_dev->default_gid_type[i - rdma_start_port(device)] =
4239 find_first_bit(&supported_gids, BITS_PER_LONG);
4240 }
4241
4242 init_completion(&cma_dev->comp);
4243 atomic_set(&cma_dev->refcount, 1);
4244 INIT_LIST_HEAD(&cma_dev->id_list);
4245 ib_set_client_data(device, &cma_client, cma_dev);
4246
4247 mutex_lock(&lock);
4248 list_add_tail(&cma_dev->list, &dev_list);
4249 list_for_each_entry(id_priv, &listen_any_list, list)
4250 cma_listen_on_dev(id_priv, cma_dev);
4251 mutex_unlock(&lock);
4252 }
4253
4254 static int cma_remove_id_dev(struct rdma_id_private *id_priv)
4255 {
4256 struct rdma_cm_event event;
4257 enum rdma_cm_state state;
4258 int ret = 0;
4259
4260 /* Record that we want to remove the device */
4261 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
4262 if (state == RDMA_CM_DESTROYING)
4263 return 0;
4264
4265 cma_cancel_operation(id_priv, state);
4266 mutex_lock(&id_priv->handler_mutex);
4267
4268 /* Check for destruction from another callback. */
4269 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
4270 goto out;
4271
4272 memset(&event, 0, sizeof event);
4273 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
4274 ret = id_priv->id.event_handler(&id_priv->id, &event);
4275 out:
4276 mutex_unlock(&id_priv->handler_mutex);
4277 return ret;
4278 }
4279
4280 static void cma_process_remove(struct cma_device *cma_dev)
4281 {
4282 struct rdma_id_private *id_priv;
4283 int ret;
4284
4285 mutex_lock(&lock);
4286 while (!list_empty(&cma_dev->id_list)) {
4287 id_priv = list_entry(cma_dev->id_list.next,
4288 struct rdma_id_private, list);
4289
4290 list_del(&id_priv->listen_list);
4291 list_del_init(&id_priv->list);
4292 atomic_inc(&id_priv->refcount);
4293 mutex_unlock(&lock);
4294
4295 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
4296 cma_deref_id(id_priv);
4297 if (ret)
4298 rdma_destroy_id(&id_priv->id);
4299
4300 mutex_lock(&lock);
4301 }
4302 mutex_unlock(&lock);
4303
4304 cma_deref_dev(cma_dev);
4305 wait_for_completion(&cma_dev->comp);
4306 }
4307
4308 static void cma_remove_one(struct ib_device *device, void *client_data)
4309 {
4310 struct cma_device *cma_dev = client_data;
4311
4312 if (!cma_dev)
4313 return;
4314
4315 mutex_lock(&lock);
4316 list_del(&cma_dev->list);
4317 mutex_unlock(&lock);
4318
4319 cma_process_remove(cma_dev);
4320 kfree(cma_dev->default_gid_type);
4321 kfree(cma_dev);
4322 }
4323
4324 static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb)
4325 {
4326 struct nlmsghdr *nlh;
4327 struct rdma_cm_id_stats *id_stats;
4328 struct rdma_id_private *id_priv;
4329 struct rdma_cm_id *id = NULL;
4330 struct cma_device *cma_dev;
4331 int i_dev = 0, i_id = 0;
4332
4333 /*
4334 * We export all of the IDs as a sequence of messages. Each
4335 * ID gets its own netlink message.
4336 */
4337 mutex_lock(&lock);
4338
4339 list_for_each_entry(cma_dev, &dev_list, list) {
4340 if (i_dev < cb->args[0]) {
4341 i_dev++;
4342 continue;
4343 }
4344
4345 i_id = 0;
4346 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
4347 if (i_id < cb->args[1]) {
4348 i_id++;
4349 continue;
4350 }
4351
4352 id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq,
4353 sizeof *id_stats, RDMA_NL_RDMA_CM,
4354 RDMA_NL_RDMA_CM_ID_STATS,
4355 NLM_F_MULTI);
4356 if (!id_stats)
4357 goto out;
4358
4359 memset(id_stats, 0, sizeof *id_stats);
4360 id = &id_priv->id;
4361 id_stats->node_type = id->route.addr.dev_addr.dev_type;
4362 id_stats->port_num = id->port_num;
4363 id_stats->bound_dev_if =
4364 id->route.addr.dev_addr.bound_dev_if;
4365
4366 if (ibnl_put_attr(skb, nlh,
4367 rdma_addr_size(cma_src_addr(id_priv)),
4368 cma_src_addr(id_priv),
4369 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR))
4370 goto out;
4371 if (ibnl_put_attr(skb, nlh,
4372 rdma_addr_size(cma_src_addr(id_priv)),
4373 cma_dst_addr(id_priv),
4374 RDMA_NL_RDMA_CM_ATTR_DST_ADDR))
4375 goto out;
4376
4377 id_stats->pid = id_priv->owner;
4378 id_stats->port_space = id->ps;
4379 id_stats->cm_state = id_priv->state;
4380 id_stats->qp_num = id_priv->qp_num;
4381 id_stats->qp_type = id->qp_type;
4382
4383 i_id++;
4384 }
4385
4386 cb->args[1] = 0;
4387 i_dev++;
4388 }
4389
4390 out:
4391 mutex_unlock(&lock);
4392 cb->args[0] = i_dev;
4393 cb->args[1] = i_id;
4394
4395 return skb->len;
4396 }
4397
4398 static const struct ibnl_client_cbs cma_cb_table[] = {
4399 [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats,
4400 .module = THIS_MODULE },
4401 };
4402
4403 static int cma_init_net(struct net *net)
4404 {
4405 struct cma_pernet *pernet = cma_pernet(net);
4406
4407 idr_init(&pernet->tcp_ps);
4408 idr_init(&pernet->udp_ps);
4409 idr_init(&pernet->ipoib_ps);
4410 idr_init(&pernet->ib_ps);
4411
4412 return 0;
4413 }
4414
4415 static void cma_exit_net(struct net *net)
4416 {
4417 struct cma_pernet *pernet = cma_pernet(net);
4418
4419 idr_destroy(&pernet->tcp_ps);
4420 idr_destroy(&pernet->udp_ps);
4421 idr_destroy(&pernet->ipoib_ps);
4422 idr_destroy(&pernet->ib_ps);
4423 }
4424
4425 static struct pernet_operations cma_pernet_operations = {
4426 .init = cma_init_net,
4427 .exit = cma_exit_net,
4428 .id = &cma_pernet_id,
4429 .size = sizeof(struct cma_pernet),
4430 };
4431
4432 static int __init cma_init(void)
4433 {
4434 int ret;
4435
4436 cma_wq = alloc_ordered_workqueue("rdma_cm", WQ_MEM_RECLAIM);
4437 if (!cma_wq)
4438 return -ENOMEM;
4439
4440 ret = register_pernet_subsys(&cma_pernet_operations);
4441 if (ret)
4442 goto err_wq;
4443
4444 ib_sa_register_client(&sa_client);
4445 rdma_addr_register_client(&addr_client);
4446 register_netdevice_notifier(&cma_nb);
4447
4448 ret = ib_register_client(&cma_client);
4449 if (ret)
4450 goto err;
4451
4452 if (ibnl_add_client(RDMA_NL_RDMA_CM, ARRAY_SIZE(cma_cb_table),
4453 cma_cb_table))
4454 pr_warn("RDMA CMA: failed to add netlink callback\n");
4455 cma_configfs_init();
4456
4457 return 0;
4458
4459 err:
4460 unregister_netdevice_notifier(&cma_nb);
4461 rdma_addr_unregister_client(&addr_client);
4462 ib_sa_unregister_client(&sa_client);
4463 err_wq:
4464 destroy_workqueue(cma_wq);
4465 return ret;
4466 }
4467
4468 static void __exit cma_cleanup(void)
4469 {
4470 cma_configfs_exit();
4471 ibnl_remove_client(RDMA_NL_RDMA_CM);
4472 ib_unregister_client(&cma_client);
4473 unregister_netdevice_notifier(&cma_nb);
4474 rdma_addr_unregister_client(&addr_client);
4475 ib_sa_unregister_client(&sa_client);
4476 unregister_pernet_subsys(&cma_pernet_operations);
4477 destroy_workqueue(cma_wq);
4478 }
4479
4480 module_init(cma_init);
4481 module_exit(cma_cleanup);
Linux with added FPC-III support