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