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Merge tag 'linux-kselftest-4.13-rc6-fixes' of git://git.kernel.org/pub/scm/linux...
[mirror_ubuntu-artful-kernel.git] / drivers / infiniband / core / cma.c
1 /*
2 * Copyright (c) 2005 Voltaire Inc. All rights reserved.
3 * Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved.
4 * Copyright (c) 1999-2005, Mellanox Technologies, Inc. All rights reserved.
5 * Copyright (c) 2005-2006 Intel Corporation. All rights reserved.
6 *
7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
12 *
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
15 * conditions are met:
16 *
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
19 * disclaimer.
20 *
21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
25 *
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 * SOFTWARE.
34 */
35
36 #include <linux/completion.h>
37 #include <linux/in.h>
38 #include <linux/in6.h>
39 #include <linux/mutex.h>
40 #include <linux/random.h>
41 #include <linux/igmp.h>
42 #include <linux/idr.h>
43 #include <linux/inetdevice.h>
44 #include <linux/slab.h>
45 #include <linux/module.h>
46 #include <net/route.h>
47
48 #include <net/net_namespace.h>
49 #include <net/netns/generic.h>
50 #include <net/tcp.h>
51 #include <net/ipv6.h>
52 #include <net/ip_fib.h>
53 #include <net/ip6_route.h>
54
55 #include <rdma/rdma_cm.h>
56 #include <rdma/rdma_cm_ib.h>
57 #include <rdma/rdma_netlink.h>
58 #include <rdma/ib.h>
59 #include <rdma/ib_cache.h>
60 #include <rdma/ib_cm.h>
61 #include <rdma/ib_sa.h>
62 #include <rdma/iw_cm.h>
63
64 #include "core_priv.h"
65
66 MODULE_AUTHOR("Sean Hefty");
67 MODULE_DESCRIPTION("Generic RDMA CM Agent");
68 MODULE_LICENSE("Dual BSD/GPL");
69
70 #define CMA_CM_RESPONSE_TIMEOUT 20
71 #define CMA_QUERY_CLASSPORT_INFO_TIMEOUT 3000
72 #define CMA_MAX_CM_RETRIES 15
73 #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
74 #define CMA_IBOE_PACKET_LIFETIME 18
75
76 static const char * const cma_events[] = {
77 [RDMA_CM_EVENT_ADDR_RESOLVED] = "address resolved",
78 [RDMA_CM_EVENT_ADDR_ERROR] = "address error",
79 [RDMA_CM_EVENT_ROUTE_RESOLVED] = "route resolved ",
80 [RDMA_CM_EVENT_ROUTE_ERROR] = "route error",
81 [RDMA_CM_EVENT_CONNECT_REQUEST] = "connect request",
82 [RDMA_CM_EVENT_CONNECT_RESPONSE] = "connect response",
83 [RDMA_CM_EVENT_CONNECT_ERROR] = "connect error",
84 [RDMA_CM_EVENT_UNREACHABLE] = "unreachable",
85 [RDMA_CM_EVENT_REJECTED] = "rejected",
86 [RDMA_CM_EVENT_ESTABLISHED] = "established",
87 [RDMA_CM_EVENT_DISCONNECTED] = "disconnected",
88 [RDMA_CM_EVENT_DEVICE_REMOVAL] = "device removal",
89 [RDMA_CM_EVENT_MULTICAST_JOIN] = "multicast join",
90 [RDMA_CM_EVENT_MULTICAST_ERROR] = "multicast error",
91 [RDMA_CM_EVENT_ADDR_CHANGE] = "address change",
92 [RDMA_CM_EVENT_TIMEWAIT_EXIT] = "timewait exit",
93 };
94
95 const char *__attribute_const__ rdma_event_msg(enum rdma_cm_event_type event)
96 {
97 size_t index = event;
98
99 return (index < ARRAY_SIZE(cma_events) && cma_events[index]) ?
100 cma_events[index] : "unrecognized event";
101 }
102 EXPORT_SYMBOL(rdma_event_msg);
103
104 const char *__attribute_const__ rdma_reject_msg(struct rdma_cm_id *id,
105 int reason)
106 {
107 if (rdma_ib_or_roce(id->device, id->port_num))
108 return ibcm_reject_msg(reason);
109
110 if (rdma_protocol_iwarp(id->device, id->port_num))
111 return iwcm_reject_msg(reason);
112
113 WARN_ON_ONCE(1);
114 return "unrecognized transport";
115 }
116 EXPORT_SYMBOL(rdma_reject_msg);
117
118 bool rdma_is_consumer_reject(struct rdma_cm_id *id, int reason)
119 {
120 if (rdma_ib_or_roce(id->device, id->port_num))
121 return reason == IB_CM_REJ_CONSUMER_DEFINED;
122
123 if (rdma_protocol_iwarp(id->device, id->port_num))
124 return reason == -ECONNREFUSED;
125
126 WARN_ON_ONCE(1);
127 return false;
128 }
129 EXPORT_SYMBOL(rdma_is_consumer_reject);
130
131 const void *rdma_consumer_reject_data(struct rdma_cm_id *id,
132 struct rdma_cm_event *ev, u8 *data_len)
133 {
134 const void *p;
135
136 if (rdma_is_consumer_reject(id, ev->status)) {
137 *data_len = ev->param.conn.private_data_len;
138 p = ev->param.conn.private_data;
139 } else {
140 *data_len = 0;
141 p = NULL;
142 }
143 return p;
144 }
145 EXPORT_SYMBOL(rdma_consumer_reject_data);
146
147 static void cma_add_one(struct ib_device *device);
148 static void cma_remove_one(struct ib_device *device, void *client_data);
149
150 static struct ib_client cma_client = {
151 .name = "cma",
152 .add = cma_add_one,
153 .remove = cma_remove_one
154 };
155
156 static struct ib_sa_client sa_client;
157 static struct rdma_addr_client addr_client;
158 static LIST_HEAD(dev_list);
159 static LIST_HEAD(listen_any_list);
160 static DEFINE_MUTEX(lock);
161 static struct workqueue_struct *cma_wq;
162 static unsigned int cma_pernet_id;
163
164 struct cma_pernet {
165 struct idr tcp_ps;
166 struct idr udp_ps;
167 struct idr ipoib_ps;
168 struct idr ib_ps;
169 };
170
171 static struct cma_pernet *cma_pernet(struct net *net)
172 {
173 return net_generic(net, cma_pernet_id);
174 }
175
176 static struct idr *cma_pernet_idr(struct net *net, enum rdma_port_space ps)
177 {
178 struct cma_pernet *pernet = cma_pernet(net);
179
180 switch (ps) {
181 case RDMA_PS_TCP:
182 return &pernet->tcp_ps;
183 case RDMA_PS_UDP:
184 return &pernet->udp_ps;
185 case RDMA_PS_IPOIB:
186 return &pernet->ipoib_ps;
187 case RDMA_PS_IB:
188 return &pernet->ib_ps;
189 default:
190 return NULL;
191 }
192 }
193
194 struct cma_device {
195 struct list_head list;
196 struct ib_device *device;
197 struct completion comp;
198 atomic_t refcount;
199 struct list_head id_list;
200 enum ib_gid_type *default_gid_type;
201 u8 *default_roce_tos;
202 };
203
204 struct rdma_bind_list {
205 enum rdma_port_space ps;
206 struct hlist_head owners;
207 unsigned short port;
208 };
209
210 struct class_port_info_context {
211 struct ib_class_port_info *class_port_info;
212 struct ib_device *device;
213 struct completion done;
214 struct ib_sa_query *sa_query;
215 u8 port_num;
216 };
217
218 static int cma_ps_alloc(struct net *net, enum rdma_port_space ps,
219 struct rdma_bind_list *bind_list, int snum)
220 {
221 struct idr *idr = cma_pernet_idr(net, ps);
222
223 return idr_alloc(idr, bind_list, snum, snum + 1, GFP_KERNEL);
224 }
225
226 static struct rdma_bind_list *cma_ps_find(struct net *net,
227 enum rdma_port_space ps, int snum)
228 {
229 struct idr *idr = cma_pernet_idr(net, ps);
230
231 return idr_find(idr, snum);
232 }
233
234 static void cma_ps_remove(struct net *net, enum rdma_port_space ps, int snum)
235 {
236 struct idr *idr = cma_pernet_idr(net, ps);
237
238 idr_remove(idr, snum);
239 }
240
241 enum {
242 CMA_OPTION_AFONLY,
243 };
244
245 void cma_ref_dev(struct cma_device *cma_dev)
246 {
247 atomic_inc(&cma_dev->refcount);
248 }
249
250 struct cma_device *cma_enum_devices_by_ibdev(cma_device_filter filter,
251 void *cookie)
252 {
253 struct cma_device *cma_dev;
254 struct cma_device *found_cma_dev = NULL;
255
256 mutex_lock(&lock);
257
258 list_for_each_entry(cma_dev, &dev_list, list)
259 if (filter(cma_dev->device, cookie)) {
260 found_cma_dev = cma_dev;
261 break;
262 }
263
264 if (found_cma_dev)
265 cma_ref_dev(found_cma_dev);
266 mutex_unlock(&lock);
267 return found_cma_dev;
268 }
269
270 int cma_get_default_gid_type(struct cma_device *cma_dev,
271 unsigned int port)
272 {
273 if (!rdma_is_port_valid(cma_dev->device, port))
274 return -EINVAL;
275
276 return cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)];
277 }
278
279 int cma_set_default_gid_type(struct cma_device *cma_dev,
280 unsigned int port,
281 enum ib_gid_type default_gid_type)
282 {
283 unsigned long supported_gids;
284
285 if (!rdma_is_port_valid(cma_dev->device, port))
286 return -EINVAL;
287
288 supported_gids = roce_gid_type_mask_support(cma_dev->device, port);
289
290 if (!(supported_gids & 1 << default_gid_type))
291 return -EINVAL;
292
293 cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)] =
294 default_gid_type;
295
296 return 0;
297 }
298
299 int cma_get_default_roce_tos(struct cma_device *cma_dev, unsigned int port)
300 {
301 if (!rdma_is_port_valid(cma_dev->device, port))
302 return -EINVAL;
303
304 return cma_dev->default_roce_tos[port - rdma_start_port(cma_dev->device)];
305 }
306
307 int cma_set_default_roce_tos(struct cma_device *cma_dev, unsigned int port,
308 u8 default_roce_tos)
309 {
310 if (!rdma_is_port_valid(cma_dev->device, port))
311 return -EINVAL;
312
313 cma_dev->default_roce_tos[port - rdma_start_port(cma_dev->device)] =
314 default_roce_tos;
315
316 return 0;
317 }
318 struct ib_device *cma_get_ib_dev(struct cma_device *cma_dev)
319 {
320 return cma_dev->device;
321 }
322
323 /*
324 * Device removal can occur at anytime, so we need extra handling to
325 * serialize notifying the user of device removal with other callbacks.
326 * We do this by disabling removal notification while a callback is in process,
327 * and reporting it after the callback completes.
328 */
329 struct rdma_id_private {
330 struct rdma_cm_id id;
331
332 struct rdma_bind_list *bind_list;
333 struct hlist_node node;
334 struct list_head list; /* listen_any_list or cma_device.list */
335 struct list_head listen_list; /* per device listens */
336 struct cma_device *cma_dev;
337 struct list_head mc_list;
338
339 int internal_id;
340 enum rdma_cm_state state;
341 spinlock_t lock;
342 struct mutex qp_mutex;
343
344 struct completion comp;
345 atomic_t refcount;
346 struct mutex handler_mutex;
347
348 int backlog;
349 int timeout_ms;
350 struct ib_sa_query *query;
351 int query_id;
352 union {
353 struct ib_cm_id *ib;
354 struct iw_cm_id *iw;
355 } cm_id;
356
357 u32 seq_num;
358 u32 qkey;
359 u32 qp_num;
360 pid_t owner;
361 u32 options;
362 u8 srq;
363 u8 tos;
364 bool tos_set;
365 u8 reuseaddr;
366 u8 afonly;
367 enum ib_gid_type gid_type;
368 };
369
370 struct cma_multicast {
371 struct rdma_id_private *id_priv;
372 union {
373 struct ib_sa_multicast *ib;
374 } multicast;
375 struct list_head list;
376 void *context;
377 struct sockaddr_storage addr;
378 struct kref mcref;
379 bool igmp_joined;
380 u8 join_state;
381 };
382
383 struct cma_work {
384 struct work_struct work;
385 struct rdma_id_private *id;
386 enum rdma_cm_state old_state;
387 enum rdma_cm_state new_state;
388 struct rdma_cm_event event;
389 };
390
391 struct cma_ndev_work {
392 struct work_struct work;
393 struct rdma_id_private *id;
394 struct rdma_cm_event event;
395 };
396
397 struct iboe_mcast_work {
398 struct work_struct work;
399 struct rdma_id_private *id;
400 struct cma_multicast *mc;
401 };
402
403 union cma_ip_addr {
404 struct in6_addr ip6;
405 struct {
406 __be32 pad[3];
407 __be32 addr;
408 } ip4;
409 };
410
411 struct cma_hdr {
412 u8 cma_version;
413 u8 ip_version; /* IP version: 7:4 */
414 __be16 port;
415 union cma_ip_addr src_addr;
416 union cma_ip_addr dst_addr;
417 };
418
419 #define CMA_VERSION 0x00
420
421 struct cma_req_info {
422 struct ib_device *device;
423 int port;
424 union ib_gid local_gid;
425 __be64 service_id;
426 u16 pkey;
427 bool has_gid:1;
428 };
429
430 static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp)
431 {
432 unsigned long flags;
433 int ret;
434
435 spin_lock_irqsave(&id_priv->lock, flags);
436 ret = (id_priv->state == comp);
437 spin_unlock_irqrestore(&id_priv->lock, flags);
438 return ret;
439 }
440
441 static int cma_comp_exch(struct rdma_id_private *id_priv,
442 enum rdma_cm_state comp, enum rdma_cm_state exch)
443 {
444 unsigned long flags;
445 int ret;
446
447 spin_lock_irqsave(&id_priv->lock, flags);
448 if ((ret = (id_priv->state == comp)))
449 id_priv->state = exch;
450 spin_unlock_irqrestore(&id_priv->lock, flags);
451 return ret;
452 }
453
454 static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv,
455 enum rdma_cm_state exch)
456 {
457 unsigned long flags;
458 enum rdma_cm_state old;
459
460 spin_lock_irqsave(&id_priv->lock, flags);
461 old = id_priv->state;
462 id_priv->state = exch;
463 spin_unlock_irqrestore(&id_priv->lock, flags);
464 return old;
465 }
466
467 static inline u8 cma_get_ip_ver(const struct cma_hdr *hdr)
468 {
469 return hdr->ip_version >> 4;
470 }
471
472 static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
473 {
474 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
475 }
476
477 static int cma_igmp_send(struct net_device *ndev, union ib_gid *mgid, bool join)
478 {
479 struct in_device *in_dev = NULL;
480
481 if (ndev) {
482 rtnl_lock();
483 in_dev = __in_dev_get_rtnl(ndev);
484 if (in_dev) {
485 if (join)
486 ip_mc_inc_group(in_dev,
487 *(__be32 *)(mgid->raw + 12));
488 else
489 ip_mc_dec_group(in_dev,
490 *(__be32 *)(mgid->raw + 12));
491 }
492 rtnl_unlock();
493 }
494 return (in_dev) ? 0 : -ENODEV;
495 }
496
497 static void _cma_attach_to_dev(struct rdma_id_private *id_priv,
498 struct cma_device *cma_dev)
499 {
500 cma_ref_dev(cma_dev);
501 id_priv->cma_dev = cma_dev;
502 id_priv->gid_type = 0;
503 id_priv->id.device = cma_dev->device;
504 id_priv->id.route.addr.dev_addr.transport =
505 rdma_node_get_transport(cma_dev->device->node_type);
506 list_add_tail(&id_priv->list, &cma_dev->id_list);
507 }
508
509 static void cma_attach_to_dev(struct rdma_id_private *id_priv,
510 struct cma_device *cma_dev)
511 {
512 _cma_attach_to_dev(id_priv, cma_dev);
513 id_priv->gid_type =
514 cma_dev->default_gid_type[id_priv->id.port_num -
515 rdma_start_port(cma_dev->device)];
516 }
517
518 void cma_deref_dev(struct cma_device *cma_dev)
519 {
520 if (atomic_dec_and_test(&cma_dev->refcount))
521 complete(&cma_dev->comp);
522 }
523
524 static inline void release_mc(struct kref *kref)
525 {
526 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
527
528 kfree(mc->multicast.ib);
529 kfree(mc);
530 }
531
532 static void cma_release_dev(struct rdma_id_private *id_priv)
533 {
534 mutex_lock(&lock);
535 list_del(&id_priv->list);
536 cma_deref_dev(id_priv->cma_dev);
537 id_priv->cma_dev = NULL;
538 mutex_unlock(&lock);
539 }
540
541 static inline struct sockaddr *cma_src_addr(struct rdma_id_private *id_priv)
542 {
543 return (struct sockaddr *) &id_priv->id.route.addr.src_addr;
544 }
545
546 static inline struct sockaddr *cma_dst_addr(struct rdma_id_private *id_priv)
547 {
548 return (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
549 }
550
551 static inline unsigned short cma_family(struct rdma_id_private *id_priv)
552 {
553 return id_priv->id.route.addr.src_addr.ss_family;
554 }
555
556 static int cma_set_qkey(struct rdma_id_private *id_priv, u32 qkey)
557 {
558 struct ib_sa_mcmember_rec rec;
559 int ret = 0;
560
561 if (id_priv->qkey) {
562 if (qkey && id_priv->qkey != qkey)
563 return -EINVAL;
564 return 0;
565 }
566
567 if (qkey) {
568 id_priv->qkey = qkey;
569 return 0;
570 }
571
572 switch (id_priv->id.ps) {
573 case RDMA_PS_UDP:
574 case RDMA_PS_IB:
575 id_priv->qkey = RDMA_UDP_QKEY;
576 break;
577 case RDMA_PS_IPOIB:
578 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
579 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
580 id_priv->id.port_num, &rec.mgid,
581 &rec);
582 if (!ret)
583 id_priv->qkey = be32_to_cpu(rec.qkey);
584 break;
585 default:
586 break;
587 }
588 return ret;
589 }
590
591 static void cma_translate_ib(struct sockaddr_ib *sib, struct rdma_dev_addr *dev_addr)
592 {
593 dev_addr->dev_type = ARPHRD_INFINIBAND;
594 rdma_addr_set_sgid(dev_addr, (union ib_gid *) &sib->sib_addr);
595 ib_addr_set_pkey(dev_addr, ntohs(sib->sib_pkey));
596 }
597
598 static int cma_translate_addr(struct sockaddr *addr, struct rdma_dev_addr *dev_addr)
599 {
600 int ret;
601
602 if (addr->sa_family != AF_IB) {
603 ret = rdma_translate_ip(addr, dev_addr, NULL);
604 } else {
605 cma_translate_ib((struct sockaddr_ib *) addr, dev_addr);
606 ret = 0;
607 }
608
609 return ret;
610 }
611
612 static inline int cma_validate_port(struct ib_device *device, u8 port,
613 enum ib_gid_type gid_type,
614 union ib_gid *gid, int dev_type,
615 int bound_if_index)
616 {
617 int ret = -ENODEV;
618 struct net_device *ndev = NULL;
619
620 if ((dev_type == ARPHRD_INFINIBAND) && !rdma_protocol_ib(device, port))
621 return ret;
622
623 if ((dev_type != ARPHRD_INFINIBAND) && rdma_protocol_ib(device, port))
624 return ret;
625
626 if (dev_type == ARPHRD_ETHER && rdma_protocol_roce(device, port))
627 ndev = dev_get_by_index(&init_net, bound_if_index);
628 else
629 gid_type = IB_GID_TYPE_IB;
630
631
632 ret = ib_find_cached_gid_by_port(device, gid, gid_type, port,
633 ndev, NULL);
634
635 if (ndev)
636 dev_put(ndev);
637
638 return ret;
639 }
640
641 static int cma_acquire_dev(struct rdma_id_private *id_priv,
642 struct rdma_id_private *listen_id_priv)
643 {
644 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
645 struct cma_device *cma_dev;
646 union ib_gid gid, iboe_gid, *gidp;
647 int ret = -ENODEV;
648 u8 port;
649
650 if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
651 id_priv->id.ps == RDMA_PS_IPOIB)
652 return -EINVAL;
653
654 mutex_lock(&lock);
655 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
656 &iboe_gid);
657
658 memcpy(&gid, dev_addr->src_dev_addr +
659 rdma_addr_gid_offset(dev_addr), sizeof gid);
660
661 if (listen_id_priv) {
662 cma_dev = listen_id_priv->cma_dev;
663 port = listen_id_priv->id.port_num;
664 gidp = rdma_protocol_roce(cma_dev->device, port) ?
665 &iboe_gid : &gid;
666
667 ret = cma_validate_port(cma_dev->device, port,
668 rdma_protocol_ib(cma_dev->device, port) ?
669 IB_GID_TYPE_IB :
670 listen_id_priv->gid_type, gidp,
671 dev_addr->dev_type,
672 dev_addr->bound_dev_if);
673 if (!ret) {
674 id_priv->id.port_num = port;
675 goto out;
676 }
677 }
678
679 list_for_each_entry(cma_dev, &dev_list, list) {
680 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
681 if (listen_id_priv &&
682 listen_id_priv->cma_dev == cma_dev &&
683 listen_id_priv->id.port_num == port)
684 continue;
685
686 gidp = rdma_protocol_roce(cma_dev->device, port) ?
687 &iboe_gid : &gid;
688
689 ret = cma_validate_port(cma_dev->device, port,
690 rdma_protocol_ib(cma_dev->device, port) ?
691 IB_GID_TYPE_IB :
692 cma_dev->default_gid_type[port - 1],
693 gidp, dev_addr->dev_type,
694 dev_addr->bound_dev_if);
695 if (!ret) {
696 id_priv->id.port_num = port;
697 goto out;
698 }
699 }
700 }
701
702 out:
703 if (!ret)
704 cma_attach_to_dev(id_priv, cma_dev);
705
706 mutex_unlock(&lock);
707 return ret;
708 }
709
710 /*
711 * Select the source IB device and address to reach the destination IB address.
712 */
713 static int cma_resolve_ib_dev(struct rdma_id_private *id_priv)
714 {
715 struct cma_device *cma_dev, *cur_dev;
716 struct sockaddr_ib *addr;
717 union ib_gid gid, sgid, *dgid;
718 u16 pkey, index;
719 u8 p;
720 enum ib_port_state port_state;
721 int i;
722
723 cma_dev = NULL;
724 addr = (struct sockaddr_ib *) cma_dst_addr(id_priv);
725 dgid = (union ib_gid *) &addr->sib_addr;
726 pkey = ntohs(addr->sib_pkey);
727
728 list_for_each_entry(cur_dev, &dev_list, list) {
729 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
730 if (!rdma_cap_af_ib(cur_dev->device, p))
731 continue;
732
733 if (ib_find_cached_pkey(cur_dev->device, p, pkey, &index))
734 continue;
735
736 if (ib_get_cached_port_state(cur_dev->device, p, &port_state))
737 continue;
738 for (i = 0; !ib_get_cached_gid(cur_dev->device, p, i,
739 &gid, NULL);
740 i++) {
741 if (!memcmp(&gid, dgid, sizeof(gid))) {
742 cma_dev = cur_dev;
743 sgid = gid;
744 id_priv->id.port_num = p;
745 goto found;
746 }
747
748 if (!cma_dev && (gid.global.subnet_prefix ==
749 dgid->global.subnet_prefix) &&
750 port_state == IB_PORT_ACTIVE) {
751 cma_dev = cur_dev;
752 sgid = gid;
753 id_priv->id.port_num = p;
754 }
755 }
756 }
757 }
758
759 if (!cma_dev)
760 return -ENODEV;
761
762 found:
763 cma_attach_to_dev(id_priv, cma_dev);
764 addr = (struct sockaddr_ib *) cma_src_addr(id_priv);
765 memcpy(&addr->sib_addr, &sgid, sizeof sgid);
766 cma_translate_ib(addr, &id_priv->id.route.addr.dev_addr);
767 return 0;
768 }
769
770 static void cma_deref_id(struct rdma_id_private *id_priv)
771 {
772 if (atomic_dec_and_test(&id_priv->refcount))
773 complete(&id_priv->comp);
774 }
775
776 struct rdma_cm_id *rdma_create_id(struct net *net,
777 rdma_cm_event_handler event_handler,
778 void *context, enum rdma_port_space ps,
779 enum ib_qp_type qp_type)
780 {
781 struct rdma_id_private *id_priv;
782
783 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
784 if (!id_priv)
785 return ERR_PTR(-ENOMEM);
786
787 id_priv->owner = task_pid_nr(current);
788 id_priv->state = RDMA_CM_IDLE;
789 id_priv->id.context = context;
790 id_priv->id.event_handler = event_handler;
791 id_priv->id.ps = ps;
792 id_priv->id.qp_type = qp_type;
793 id_priv->tos_set = false;
794 spin_lock_init(&id_priv->lock);
795 mutex_init(&id_priv->qp_mutex);
796 init_completion(&id_priv->comp);
797 atomic_set(&id_priv->refcount, 1);
798 mutex_init(&id_priv->handler_mutex);
799 INIT_LIST_HEAD(&id_priv->listen_list);
800 INIT_LIST_HEAD(&id_priv->mc_list);
801 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
802 id_priv->id.route.addr.dev_addr.net = get_net(net);
803
804 return &id_priv->id;
805 }
806 EXPORT_SYMBOL(rdma_create_id);
807
808 static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
809 {
810 struct ib_qp_attr qp_attr;
811 int qp_attr_mask, ret;
812
813 qp_attr.qp_state = IB_QPS_INIT;
814 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
815 if (ret)
816 return ret;
817
818 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
819 if (ret)
820 return ret;
821
822 qp_attr.qp_state = IB_QPS_RTR;
823 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
824 if (ret)
825 return ret;
826
827 qp_attr.qp_state = IB_QPS_RTS;
828 qp_attr.sq_psn = 0;
829 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
830
831 return ret;
832 }
833
834 static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
835 {
836 struct ib_qp_attr qp_attr;
837 int qp_attr_mask, ret;
838
839 qp_attr.qp_state = IB_QPS_INIT;
840 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
841 if (ret)
842 return ret;
843
844 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
845 }
846
847 int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
848 struct ib_qp_init_attr *qp_init_attr)
849 {
850 struct rdma_id_private *id_priv;
851 struct ib_qp *qp;
852 int ret;
853
854 id_priv = container_of(id, struct rdma_id_private, id);
855 if (id->device != pd->device)
856 return -EINVAL;
857
858 qp_init_attr->port_num = id->port_num;
859 qp = ib_create_qp(pd, qp_init_attr);
860 if (IS_ERR(qp))
861 return PTR_ERR(qp);
862
863 if (id->qp_type == IB_QPT_UD)
864 ret = cma_init_ud_qp(id_priv, qp);
865 else
866 ret = cma_init_conn_qp(id_priv, qp);
867 if (ret)
868 goto err;
869
870 id->qp = qp;
871 id_priv->qp_num = qp->qp_num;
872 id_priv->srq = (qp->srq != NULL);
873 return 0;
874 err:
875 ib_destroy_qp(qp);
876 return ret;
877 }
878 EXPORT_SYMBOL(rdma_create_qp);
879
880 void rdma_destroy_qp(struct rdma_cm_id *id)
881 {
882 struct rdma_id_private *id_priv;
883
884 id_priv = container_of(id, struct rdma_id_private, id);
885 mutex_lock(&id_priv->qp_mutex);
886 ib_destroy_qp(id_priv->id.qp);
887 id_priv->id.qp = NULL;
888 mutex_unlock(&id_priv->qp_mutex);
889 }
890 EXPORT_SYMBOL(rdma_destroy_qp);
891
892 static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
893 struct rdma_conn_param *conn_param)
894 {
895 struct ib_qp_attr qp_attr;
896 int qp_attr_mask, ret;
897 union ib_gid sgid;
898
899 mutex_lock(&id_priv->qp_mutex);
900 if (!id_priv->id.qp) {
901 ret = 0;
902 goto out;
903 }
904
905 /* Need to update QP attributes from default values. */
906 qp_attr.qp_state = IB_QPS_INIT;
907 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
908 if (ret)
909 goto out;
910
911 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
912 if (ret)
913 goto out;
914
915 qp_attr.qp_state = IB_QPS_RTR;
916 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
917 if (ret)
918 goto out;
919
920 ret = ib_query_gid(id_priv->id.device, id_priv->id.port_num,
921 rdma_ah_read_grh(&qp_attr.ah_attr)->sgid_index,
922 &sgid, NULL);
923 if (ret)
924 goto out;
925
926 BUG_ON(id_priv->cma_dev->device != id_priv->id.device);
927
928 if (conn_param)
929 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
930 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
931 out:
932 mutex_unlock(&id_priv->qp_mutex);
933 return ret;
934 }
935
936 static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
937 struct rdma_conn_param *conn_param)
938 {
939 struct ib_qp_attr qp_attr;
940 int qp_attr_mask, ret;
941
942 mutex_lock(&id_priv->qp_mutex);
943 if (!id_priv->id.qp) {
944 ret = 0;
945 goto out;
946 }
947
948 qp_attr.qp_state = IB_QPS_RTS;
949 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
950 if (ret)
951 goto out;
952
953 if (conn_param)
954 qp_attr.max_rd_atomic = conn_param->initiator_depth;
955 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
956 out:
957 mutex_unlock(&id_priv->qp_mutex);
958 return ret;
959 }
960
961 static int cma_modify_qp_err(struct rdma_id_private *id_priv)
962 {
963 struct ib_qp_attr qp_attr;
964 int ret;
965
966 mutex_lock(&id_priv->qp_mutex);
967 if (!id_priv->id.qp) {
968 ret = 0;
969 goto out;
970 }
971
972 qp_attr.qp_state = IB_QPS_ERR;
973 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
974 out:
975 mutex_unlock(&id_priv->qp_mutex);
976 return ret;
977 }
978
979 static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
980 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
981 {
982 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
983 int ret;
984 u16 pkey;
985
986 if (rdma_cap_eth_ah(id_priv->id.device, id_priv->id.port_num))
987 pkey = 0xffff;
988 else
989 pkey = ib_addr_get_pkey(dev_addr);
990
991 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
992 pkey, &qp_attr->pkey_index);
993 if (ret)
994 return ret;
995
996 qp_attr->port_num = id_priv->id.port_num;
997 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
998
999 if (id_priv->id.qp_type == IB_QPT_UD) {
1000 ret = cma_set_qkey(id_priv, 0);
1001 if (ret)
1002 return ret;
1003
1004 qp_attr->qkey = id_priv->qkey;
1005 *qp_attr_mask |= IB_QP_QKEY;
1006 } else {
1007 qp_attr->qp_access_flags = 0;
1008 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
1009 }
1010 return 0;
1011 }
1012
1013 int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
1014 int *qp_attr_mask)
1015 {
1016 struct rdma_id_private *id_priv;
1017 int ret = 0;
1018
1019 id_priv = container_of(id, struct rdma_id_private, id);
1020 if (rdma_cap_ib_cm(id->device, id->port_num)) {
1021 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
1022 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
1023 else
1024 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
1025 qp_attr_mask);
1026
1027 if (qp_attr->qp_state == IB_QPS_RTR)
1028 qp_attr->rq_psn = id_priv->seq_num;
1029 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
1030 if (!id_priv->cm_id.iw) {
1031 qp_attr->qp_access_flags = 0;
1032 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
1033 } else
1034 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
1035 qp_attr_mask);
1036 qp_attr->port_num = id_priv->id.port_num;
1037 *qp_attr_mask |= IB_QP_PORT;
1038 } else
1039 ret = -ENOSYS;
1040
1041 return ret;
1042 }
1043 EXPORT_SYMBOL(rdma_init_qp_attr);
1044
1045 static inline int cma_zero_addr(struct sockaddr *addr)
1046 {
1047 switch (addr->sa_family) {
1048 case AF_INET:
1049 return ipv4_is_zeronet(((struct sockaddr_in *)addr)->sin_addr.s_addr);
1050 case AF_INET6:
1051 return ipv6_addr_any(&((struct sockaddr_in6 *) addr)->sin6_addr);
1052 case AF_IB:
1053 return ib_addr_any(&((struct sockaddr_ib *) addr)->sib_addr);
1054 default:
1055 return 0;
1056 }
1057 }
1058
1059 static inline int cma_loopback_addr(struct sockaddr *addr)
1060 {
1061 switch (addr->sa_family) {
1062 case AF_INET:
1063 return ipv4_is_loopback(((struct sockaddr_in *) addr)->sin_addr.s_addr);
1064 case AF_INET6:
1065 return ipv6_addr_loopback(&((struct sockaddr_in6 *) addr)->sin6_addr);
1066 case AF_IB:
1067 return ib_addr_loopback(&((struct sockaddr_ib *) addr)->sib_addr);
1068 default:
1069 return 0;
1070 }
1071 }
1072
1073 static inline int cma_any_addr(struct sockaddr *addr)
1074 {
1075 return cma_zero_addr(addr) || cma_loopback_addr(addr);
1076 }
1077
1078 static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
1079 {
1080 if (src->sa_family != dst->sa_family)
1081 return -1;
1082
1083 switch (src->sa_family) {
1084 case AF_INET:
1085 return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
1086 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
1087 case AF_INET6:
1088 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
1089 &((struct sockaddr_in6 *) dst)->sin6_addr);
1090 default:
1091 return ib_addr_cmp(&((struct sockaddr_ib *) src)->sib_addr,
1092 &((struct sockaddr_ib *) dst)->sib_addr);
1093 }
1094 }
1095
1096 static __be16 cma_port(struct sockaddr *addr)
1097 {
1098 struct sockaddr_ib *sib;
1099
1100 switch (addr->sa_family) {
1101 case AF_INET:
1102 return ((struct sockaddr_in *) addr)->sin_port;
1103 case AF_INET6:
1104 return ((struct sockaddr_in6 *) addr)->sin6_port;
1105 case AF_IB:
1106 sib = (struct sockaddr_ib *) addr;
1107 return htons((u16) (be64_to_cpu(sib->sib_sid) &
1108 be64_to_cpu(sib->sib_sid_mask)));
1109 default:
1110 return 0;
1111 }
1112 }
1113
1114 static inline int cma_any_port(struct sockaddr *addr)
1115 {
1116 return !cma_port(addr);
1117 }
1118
1119 static void cma_save_ib_info(struct sockaddr *src_addr,
1120 struct sockaddr *dst_addr,
1121 struct rdma_cm_id *listen_id,
1122 struct sa_path_rec *path)
1123 {
1124 struct sockaddr_ib *listen_ib, *ib;
1125
1126 listen_ib = (struct sockaddr_ib *) &listen_id->route.addr.src_addr;
1127 if (src_addr) {
1128 ib = (struct sockaddr_ib *)src_addr;
1129 ib->sib_family = AF_IB;
1130 if (path) {
1131 ib->sib_pkey = path->pkey;
1132 ib->sib_flowinfo = path->flow_label;
1133 memcpy(&ib->sib_addr, &path->sgid, 16);
1134 ib->sib_sid = path->service_id;
1135 ib->sib_scope_id = 0;
1136 } else {
1137 ib->sib_pkey = listen_ib->sib_pkey;
1138 ib->sib_flowinfo = listen_ib->sib_flowinfo;
1139 ib->sib_addr = listen_ib->sib_addr;
1140 ib->sib_sid = listen_ib->sib_sid;
1141 ib->sib_scope_id = listen_ib->sib_scope_id;
1142 }
1143 ib->sib_sid_mask = cpu_to_be64(0xffffffffffffffffULL);
1144 }
1145 if (dst_addr) {
1146 ib = (struct sockaddr_ib *)dst_addr;
1147 ib->sib_family = AF_IB;
1148 if (path) {
1149 ib->sib_pkey = path->pkey;
1150 ib->sib_flowinfo = path->flow_label;
1151 memcpy(&ib->sib_addr, &path->dgid, 16);
1152 }
1153 }
1154 }
1155
1156 static void cma_save_ip4_info(struct sockaddr_in *src_addr,
1157 struct sockaddr_in *dst_addr,
1158 struct cma_hdr *hdr,
1159 __be16 local_port)
1160 {
1161 if (src_addr) {
1162 *src_addr = (struct sockaddr_in) {
1163 .sin_family = AF_INET,
1164 .sin_addr.s_addr = hdr->dst_addr.ip4.addr,
1165 .sin_port = local_port,
1166 };
1167 }
1168
1169 if (dst_addr) {
1170 *dst_addr = (struct sockaddr_in) {
1171 .sin_family = AF_INET,
1172 .sin_addr.s_addr = hdr->src_addr.ip4.addr,
1173 .sin_port = hdr->port,
1174 };
1175 }
1176 }
1177
1178 static void cma_save_ip6_info(struct sockaddr_in6 *src_addr,
1179 struct sockaddr_in6 *dst_addr,
1180 struct cma_hdr *hdr,
1181 __be16 local_port)
1182 {
1183 if (src_addr) {
1184 *src_addr = (struct sockaddr_in6) {
1185 .sin6_family = AF_INET6,
1186 .sin6_addr = hdr->dst_addr.ip6,
1187 .sin6_port = local_port,
1188 };
1189 }
1190
1191 if (dst_addr) {
1192 *dst_addr = (struct sockaddr_in6) {
1193 .sin6_family = AF_INET6,
1194 .sin6_addr = hdr->src_addr.ip6,
1195 .sin6_port = hdr->port,
1196 };
1197 }
1198 }
1199
1200 static u16 cma_port_from_service_id(__be64 service_id)
1201 {
1202 return (u16)be64_to_cpu(service_id);
1203 }
1204
1205 static int cma_save_ip_info(struct sockaddr *src_addr,
1206 struct sockaddr *dst_addr,
1207 struct ib_cm_event *ib_event,
1208 __be64 service_id)
1209 {
1210 struct cma_hdr *hdr;
1211 __be16 port;
1212
1213 hdr = ib_event->private_data;
1214 if (hdr->cma_version != CMA_VERSION)
1215 return -EINVAL;
1216
1217 port = htons(cma_port_from_service_id(service_id));
1218
1219 switch (cma_get_ip_ver(hdr)) {
1220 case 4:
1221 cma_save_ip4_info((struct sockaddr_in *)src_addr,
1222 (struct sockaddr_in *)dst_addr, hdr, port);
1223 break;
1224 case 6:
1225 cma_save_ip6_info((struct sockaddr_in6 *)src_addr,
1226 (struct sockaddr_in6 *)dst_addr, hdr, port);
1227 break;
1228 default:
1229 return -EAFNOSUPPORT;
1230 }
1231
1232 return 0;
1233 }
1234
1235 static int cma_save_net_info(struct sockaddr *src_addr,
1236 struct sockaddr *dst_addr,
1237 struct rdma_cm_id *listen_id,
1238 struct ib_cm_event *ib_event,
1239 sa_family_t sa_family, __be64 service_id)
1240 {
1241 if (sa_family == AF_IB) {
1242 if (ib_event->event == IB_CM_REQ_RECEIVED)
1243 cma_save_ib_info(src_addr, dst_addr, listen_id,
1244 ib_event->param.req_rcvd.primary_path);
1245 else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED)
1246 cma_save_ib_info(src_addr, dst_addr, listen_id, NULL);
1247 return 0;
1248 }
1249
1250 return cma_save_ip_info(src_addr, dst_addr, ib_event, service_id);
1251 }
1252
1253 static int cma_save_req_info(const struct ib_cm_event *ib_event,
1254 struct cma_req_info *req)
1255 {
1256 const struct ib_cm_req_event_param *req_param =
1257 &ib_event->param.req_rcvd;
1258 const struct ib_cm_sidr_req_event_param *sidr_param =
1259 &ib_event->param.sidr_req_rcvd;
1260
1261 switch (ib_event->event) {
1262 case IB_CM_REQ_RECEIVED:
1263 req->device = req_param->listen_id->device;
1264 req->port = req_param->port;
1265 memcpy(&req->local_gid, &req_param->primary_path->sgid,
1266 sizeof(req->local_gid));
1267 req->has_gid = true;
1268 req->service_id = req_param->primary_path->service_id;
1269 req->pkey = be16_to_cpu(req_param->primary_path->pkey);
1270 if (req->pkey != req_param->bth_pkey)
1271 pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and primary path P_Key (0x%x)\n"
1272 "RDMA CMA: in the future this may cause the request to be dropped\n",
1273 req_param->bth_pkey, req->pkey);
1274 break;
1275 case IB_CM_SIDR_REQ_RECEIVED:
1276 req->device = sidr_param->listen_id->device;
1277 req->port = sidr_param->port;
1278 req->has_gid = false;
1279 req->service_id = sidr_param->service_id;
1280 req->pkey = sidr_param->pkey;
1281 if (req->pkey != sidr_param->bth_pkey)
1282 pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and SIDR request payload P_Key (0x%x)\n"
1283 "RDMA CMA: in the future this may cause the request to be dropped\n",
1284 sidr_param->bth_pkey, req->pkey);
1285 break;
1286 default:
1287 return -EINVAL;
1288 }
1289
1290 return 0;
1291 }
1292
1293 static bool validate_ipv4_net_dev(struct net_device *net_dev,
1294 const struct sockaddr_in *dst_addr,
1295 const struct sockaddr_in *src_addr)
1296 {
1297 __be32 daddr = dst_addr->sin_addr.s_addr,
1298 saddr = src_addr->sin_addr.s_addr;
1299 struct fib_result res;
1300 struct flowi4 fl4;
1301 int err;
1302 bool ret;
1303
1304 if (ipv4_is_multicast(saddr) || ipv4_is_lbcast(saddr) ||
1305 ipv4_is_lbcast(daddr) || ipv4_is_zeronet(saddr) ||
1306 ipv4_is_zeronet(daddr) || ipv4_is_loopback(daddr) ||
1307 ipv4_is_loopback(saddr))
1308 return false;
1309
1310 memset(&fl4, 0, sizeof(fl4));
1311 fl4.flowi4_iif = net_dev->ifindex;
1312 fl4.daddr = daddr;
1313 fl4.saddr = saddr;
1314
1315 rcu_read_lock();
1316 err = fib_lookup(dev_net(net_dev), &fl4, &res, 0);
1317 ret = err == 0 && FIB_RES_DEV(res) == net_dev;
1318 rcu_read_unlock();
1319
1320 return ret;
1321 }
1322
1323 static bool validate_ipv6_net_dev(struct net_device *net_dev,
1324 const struct sockaddr_in6 *dst_addr,
1325 const struct sockaddr_in6 *src_addr)
1326 {
1327 #if IS_ENABLED(CONFIG_IPV6)
1328 const int strict = ipv6_addr_type(&dst_addr->sin6_addr) &
1329 IPV6_ADDR_LINKLOCAL;
1330 struct rt6_info *rt = rt6_lookup(dev_net(net_dev), &dst_addr->sin6_addr,
1331 &src_addr->sin6_addr, net_dev->ifindex,
1332 strict);
1333 bool ret;
1334
1335 if (!rt)
1336 return false;
1337
1338 ret = rt->rt6i_idev->dev == net_dev;
1339 ip6_rt_put(rt);
1340
1341 return ret;
1342 #else
1343 return false;
1344 #endif
1345 }
1346
1347 static bool validate_net_dev(struct net_device *net_dev,
1348 const struct sockaddr *daddr,
1349 const struct sockaddr *saddr)
1350 {
1351 const struct sockaddr_in *daddr4 = (const struct sockaddr_in *)daddr;
1352 const struct sockaddr_in *saddr4 = (const struct sockaddr_in *)saddr;
1353 const struct sockaddr_in6 *daddr6 = (const struct sockaddr_in6 *)daddr;
1354 const struct sockaddr_in6 *saddr6 = (const struct sockaddr_in6 *)saddr;
1355
1356 switch (daddr->sa_family) {
1357 case AF_INET:
1358 return saddr->sa_family == AF_INET &&
1359 validate_ipv4_net_dev(net_dev, daddr4, saddr4);
1360
1361 case AF_INET6:
1362 return saddr->sa_family == AF_INET6 &&
1363 validate_ipv6_net_dev(net_dev, daddr6, saddr6);
1364
1365 default:
1366 return false;
1367 }
1368 }
1369
1370 static struct net_device *cma_get_net_dev(struct ib_cm_event *ib_event,
1371 const struct cma_req_info *req)
1372 {
1373 struct sockaddr_storage listen_addr_storage, src_addr_storage;
1374 struct sockaddr *listen_addr = (struct sockaddr *)&listen_addr_storage,
1375 *src_addr = (struct sockaddr *)&src_addr_storage;
1376 struct net_device *net_dev;
1377 const union ib_gid *gid = req->has_gid ? &req->local_gid : NULL;
1378 int err;
1379
1380 err = cma_save_ip_info(listen_addr, src_addr, ib_event,
1381 req->service_id);
1382 if (err)
1383 return ERR_PTR(err);
1384
1385 net_dev = ib_get_net_dev_by_params(req->device, req->port, req->pkey,
1386 gid, listen_addr);
1387 if (!net_dev)
1388 return ERR_PTR(-ENODEV);
1389
1390 if (!validate_net_dev(net_dev, listen_addr, src_addr)) {
1391 dev_put(net_dev);
1392 return ERR_PTR(-EHOSTUNREACH);
1393 }
1394
1395 return net_dev;
1396 }
1397
1398 static enum rdma_port_space rdma_ps_from_service_id(__be64 service_id)
1399 {
1400 return (be64_to_cpu(service_id) >> 16) & 0xffff;
1401 }
1402
1403 static bool cma_match_private_data(struct rdma_id_private *id_priv,
1404 const struct cma_hdr *hdr)
1405 {
1406 struct sockaddr *addr = cma_src_addr(id_priv);
1407 __be32 ip4_addr;
1408 struct in6_addr ip6_addr;
1409
1410 if (cma_any_addr(addr) && !id_priv->afonly)
1411 return true;
1412
1413 switch (addr->sa_family) {
1414 case AF_INET:
1415 ip4_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
1416 if (cma_get_ip_ver(hdr) != 4)
1417 return false;
1418 if (!cma_any_addr(addr) &&
1419 hdr->dst_addr.ip4.addr != ip4_addr)
1420 return false;
1421 break;
1422 case AF_INET6:
1423 ip6_addr = ((struct sockaddr_in6 *)addr)->sin6_addr;
1424 if (cma_get_ip_ver(hdr) != 6)
1425 return false;
1426 if (!cma_any_addr(addr) &&
1427 memcmp(&hdr->dst_addr.ip6, &ip6_addr, sizeof(ip6_addr)))
1428 return false;
1429 break;
1430 case AF_IB:
1431 return true;
1432 default:
1433 return false;
1434 }
1435
1436 return true;
1437 }
1438
1439 static bool cma_protocol_roce_dev_port(struct ib_device *device, int port_num)
1440 {
1441 enum rdma_link_layer ll = rdma_port_get_link_layer(device, port_num);
1442 enum rdma_transport_type transport =
1443 rdma_node_get_transport(device->node_type);
1444
1445 return ll == IB_LINK_LAYER_ETHERNET && transport == RDMA_TRANSPORT_IB;
1446 }
1447
1448 static bool cma_protocol_roce(const struct rdma_cm_id *id)
1449 {
1450 struct ib_device *device = id->device;
1451 const int port_num = id->port_num ?: rdma_start_port(device);
1452
1453 return cma_protocol_roce_dev_port(device, port_num);
1454 }
1455
1456 static bool cma_match_net_dev(const struct rdma_cm_id *id,
1457 const struct net_device *net_dev,
1458 u8 port_num)
1459 {
1460 const struct rdma_addr *addr = &id->route.addr;
1461
1462 if (!net_dev)
1463 /* This request is an AF_IB request or a RoCE request */
1464 return (!id->port_num || id->port_num == port_num) &&
1465 (addr->src_addr.ss_family == AF_IB ||
1466 cma_protocol_roce_dev_port(id->device, port_num));
1467
1468 return !addr->dev_addr.bound_dev_if ||
1469 (net_eq(dev_net(net_dev), addr->dev_addr.net) &&
1470 addr->dev_addr.bound_dev_if == net_dev->ifindex);
1471 }
1472
1473 static struct rdma_id_private *cma_find_listener(
1474 const struct rdma_bind_list *bind_list,
1475 const struct ib_cm_id *cm_id,
1476 const struct ib_cm_event *ib_event,
1477 const struct cma_req_info *req,
1478 const struct net_device *net_dev)
1479 {
1480 struct rdma_id_private *id_priv, *id_priv_dev;
1481
1482 if (!bind_list)
1483 return ERR_PTR(-EINVAL);
1484
1485 hlist_for_each_entry(id_priv, &bind_list->owners, node) {
1486 if (cma_match_private_data(id_priv, ib_event->private_data)) {
1487 if (id_priv->id.device == cm_id->device &&
1488 cma_match_net_dev(&id_priv->id, net_dev, req->port))
1489 return id_priv;
1490 list_for_each_entry(id_priv_dev,
1491 &id_priv->listen_list,
1492 listen_list) {
1493 if (id_priv_dev->id.device == cm_id->device &&
1494 cma_match_net_dev(&id_priv_dev->id, net_dev, req->port))
1495 return id_priv_dev;
1496 }
1497 }
1498 }
1499
1500 return ERR_PTR(-EINVAL);
1501 }
1502
1503 static struct rdma_id_private *cma_id_from_event(struct ib_cm_id *cm_id,
1504 struct ib_cm_event *ib_event,
1505 struct net_device **net_dev)
1506 {
1507 struct cma_req_info req;
1508 struct rdma_bind_list *bind_list;
1509 struct rdma_id_private *id_priv;
1510 int err;
1511
1512 err = cma_save_req_info(ib_event, &req);
1513 if (err)
1514 return ERR_PTR(err);
1515
1516 *net_dev = cma_get_net_dev(ib_event, &req);
1517 if (IS_ERR(*net_dev)) {
1518 if (PTR_ERR(*net_dev) == -EAFNOSUPPORT) {
1519 /* Assuming the protocol is AF_IB */
1520 *net_dev = NULL;
1521 } else if (cma_protocol_roce_dev_port(req.device, req.port)) {
1522 /* TODO find the net dev matching the request parameters
1523 * through the RoCE GID table */
1524 *net_dev = NULL;
1525 } else {
1526 return ERR_CAST(*net_dev);
1527 }
1528 }
1529
1530 bind_list = cma_ps_find(*net_dev ? dev_net(*net_dev) : &init_net,
1531 rdma_ps_from_service_id(req.service_id),
1532 cma_port_from_service_id(req.service_id));
1533 id_priv = cma_find_listener(bind_list, cm_id, ib_event, &req, *net_dev);
1534 if (IS_ERR(id_priv) && *net_dev) {
1535 dev_put(*net_dev);
1536 *net_dev = NULL;
1537 }
1538
1539 return id_priv;
1540 }
1541
1542 static inline int cma_user_data_offset(struct rdma_id_private *id_priv)
1543 {
1544 return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr);
1545 }
1546
1547 static void cma_cancel_route(struct rdma_id_private *id_priv)
1548 {
1549 if (rdma_cap_ib_sa(id_priv->id.device, id_priv->id.port_num)) {
1550 if (id_priv->query)
1551 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
1552 }
1553 }
1554
1555 static void cma_cancel_listens(struct rdma_id_private *id_priv)
1556 {
1557 struct rdma_id_private *dev_id_priv;
1558
1559 /*
1560 * Remove from listen_any_list to prevent added devices from spawning
1561 * additional listen requests.
1562 */
1563 mutex_lock(&lock);
1564 list_del(&id_priv->list);
1565
1566 while (!list_empty(&id_priv->listen_list)) {
1567 dev_id_priv = list_entry(id_priv->listen_list.next,
1568 struct rdma_id_private, listen_list);
1569 /* sync with device removal to avoid duplicate destruction */
1570 list_del_init(&dev_id_priv->list);
1571 list_del(&dev_id_priv->listen_list);
1572 mutex_unlock(&lock);
1573
1574 rdma_destroy_id(&dev_id_priv->id);
1575 mutex_lock(&lock);
1576 }
1577 mutex_unlock(&lock);
1578 }
1579
1580 static void cma_cancel_operation(struct rdma_id_private *id_priv,
1581 enum rdma_cm_state state)
1582 {
1583 switch (state) {
1584 case RDMA_CM_ADDR_QUERY:
1585 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
1586 break;
1587 case RDMA_CM_ROUTE_QUERY:
1588 cma_cancel_route(id_priv);
1589 break;
1590 case RDMA_CM_LISTEN:
1591 if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev)
1592 cma_cancel_listens(id_priv);
1593 break;
1594 default:
1595 break;
1596 }
1597 }
1598
1599 static void cma_release_port(struct rdma_id_private *id_priv)
1600 {
1601 struct rdma_bind_list *bind_list = id_priv->bind_list;
1602 struct net *net = id_priv->id.route.addr.dev_addr.net;
1603
1604 if (!bind_list)
1605 return;
1606
1607 mutex_lock(&lock);
1608 hlist_del(&id_priv->node);
1609 if (hlist_empty(&bind_list->owners)) {
1610 cma_ps_remove(net, bind_list->ps, bind_list->port);
1611 kfree(bind_list);
1612 }
1613 mutex_unlock(&lock);
1614 }
1615
1616 static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
1617 {
1618 struct cma_multicast *mc;
1619
1620 while (!list_empty(&id_priv->mc_list)) {
1621 mc = container_of(id_priv->mc_list.next,
1622 struct cma_multicast, list);
1623 list_del(&mc->list);
1624 if (rdma_cap_ib_mcast(id_priv->cma_dev->device,
1625 id_priv->id.port_num)) {
1626 ib_sa_free_multicast(mc->multicast.ib);
1627 kfree(mc);
1628 } else {
1629 if (mc->igmp_joined) {
1630 struct rdma_dev_addr *dev_addr =
1631 &id_priv->id.route.addr.dev_addr;
1632 struct net_device *ndev = NULL;
1633
1634 if (dev_addr->bound_dev_if)
1635 ndev = dev_get_by_index(&init_net,
1636 dev_addr->bound_dev_if);
1637 if (ndev) {
1638 cma_igmp_send(ndev,
1639 &mc->multicast.ib->rec.mgid,
1640 false);
1641 dev_put(ndev);
1642 }
1643 }
1644 kref_put(&mc->mcref, release_mc);
1645 }
1646 }
1647 }
1648
1649 void rdma_destroy_id(struct rdma_cm_id *id)
1650 {
1651 struct rdma_id_private *id_priv;
1652 enum rdma_cm_state state;
1653
1654 id_priv = container_of(id, struct rdma_id_private, id);
1655 state = cma_exch(id_priv, RDMA_CM_DESTROYING);
1656 cma_cancel_operation(id_priv, state);
1657
1658 /*
1659 * Wait for any active callback to finish. New callbacks will find
1660 * the id_priv state set to destroying and abort.
1661 */
1662 mutex_lock(&id_priv->handler_mutex);
1663 mutex_unlock(&id_priv->handler_mutex);
1664
1665 if (id_priv->cma_dev) {
1666 if (rdma_cap_ib_cm(id_priv->id.device, 1)) {
1667 if (id_priv->cm_id.ib)
1668 ib_destroy_cm_id(id_priv->cm_id.ib);
1669 } else if (rdma_cap_iw_cm(id_priv->id.device, 1)) {
1670 if (id_priv->cm_id.iw)
1671 iw_destroy_cm_id(id_priv->cm_id.iw);
1672 }
1673 cma_leave_mc_groups(id_priv);
1674 cma_release_dev(id_priv);
1675 }
1676
1677 cma_release_port(id_priv);
1678 cma_deref_id(id_priv);
1679 wait_for_completion(&id_priv->comp);
1680
1681 if (id_priv->internal_id)
1682 cma_deref_id(id_priv->id.context);
1683
1684 kfree(id_priv->id.route.path_rec);
1685 put_net(id_priv->id.route.addr.dev_addr.net);
1686 kfree(id_priv);
1687 }
1688 EXPORT_SYMBOL(rdma_destroy_id);
1689
1690 static int cma_rep_recv(struct rdma_id_private *id_priv)
1691 {
1692 int ret;
1693
1694 ret = cma_modify_qp_rtr(id_priv, NULL);
1695 if (ret)
1696 goto reject;
1697
1698 ret = cma_modify_qp_rts(id_priv, NULL);
1699 if (ret)
1700 goto reject;
1701
1702 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
1703 if (ret)
1704 goto reject;
1705
1706 return 0;
1707 reject:
1708 pr_debug_ratelimited("RDMA CM: CONNECT_ERROR: failed to handle reply. status %d\n", ret);
1709 cma_modify_qp_err(id_priv);
1710 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
1711 NULL, 0, NULL, 0);
1712 return ret;
1713 }
1714
1715 static void cma_set_rep_event_data(struct rdma_cm_event *event,
1716 struct ib_cm_rep_event_param *rep_data,
1717 void *private_data)
1718 {
1719 event->param.conn.private_data = private_data;
1720 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
1721 event->param.conn.responder_resources = rep_data->responder_resources;
1722 event->param.conn.initiator_depth = rep_data->initiator_depth;
1723 event->param.conn.flow_control = rep_data->flow_control;
1724 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
1725 event->param.conn.srq = rep_data->srq;
1726 event->param.conn.qp_num = rep_data->remote_qpn;
1727 }
1728
1729 static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1730 {
1731 struct rdma_id_private *id_priv = cm_id->context;
1732 struct rdma_cm_event event;
1733 int ret = 0;
1734
1735 mutex_lock(&id_priv->handler_mutex);
1736 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
1737 id_priv->state != RDMA_CM_CONNECT) ||
1738 (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
1739 id_priv->state != RDMA_CM_DISCONNECT))
1740 goto out;
1741
1742 memset(&event, 0, sizeof event);
1743 switch (ib_event->event) {
1744 case IB_CM_REQ_ERROR:
1745 case IB_CM_REP_ERROR:
1746 event.event = RDMA_CM_EVENT_UNREACHABLE;
1747 event.status = -ETIMEDOUT;
1748 break;
1749 case IB_CM_REP_RECEIVED:
1750 if (cma_comp(id_priv, RDMA_CM_CONNECT) &&
1751 (id_priv->id.qp_type != IB_QPT_UD))
1752 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1753 if (id_priv->id.qp) {
1754 event.status = cma_rep_recv(id_priv);
1755 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1756 RDMA_CM_EVENT_ESTABLISHED;
1757 } else {
1758 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
1759 }
1760 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1761 ib_event->private_data);
1762 break;
1763 case IB_CM_RTU_RECEIVED:
1764 case IB_CM_USER_ESTABLISHED:
1765 event.event = RDMA_CM_EVENT_ESTABLISHED;
1766 break;
1767 case IB_CM_DREQ_ERROR:
1768 event.status = -ETIMEDOUT; /* fall through */
1769 case IB_CM_DREQ_RECEIVED:
1770 case IB_CM_DREP_RECEIVED:
1771 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
1772 RDMA_CM_DISCONNECT))
1773 goto out;
1774 event.event = RDMA_CM_EVENT_DISCONNECTED;
1775 break;
1776 case IB_CM_TIMEWAIT_EXIT:
1777 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1778 break;
1779 case IB_CM_MRA_RECEIVED:
1780 /* ignore event */
1781 goto out;
1782 case IB_CM_REJ_RECEIVED:
1783 pr_debug_ratelimited("RDMA CM: REJECTED: %s\n", rdma_reject_msg(&id_priv->id,
1784 ib_event->param.rej_rcvd.reason));
1785 cma_modify_qp_err(id_priv);
1786 event.status = ib_event->param.rej_rcvd.reason;
1787 event.event = RDMA_CM_EVENT_REJECTED;
1788 event.param.conn.private_data = ib_event->private_data;
1789 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
1790 break;
1791 default:
1792 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
1793 ib_event->event);
1794 goto out;
1795 }
1796
1797 ret = id_priv->id.event_handler(&id_priv->id, &event);
1798 if (ret) {
1799 /* Destroy the CM ID by returning a non-zero value. */
1800 id_priv->cm_id.ib = NULL;
1801 cma_exch(id_priv, RDMA_CM_DESTROYING);
1802 mutex_unlock(&id_priv->handler_mutex);
1803 rdma_destroy_id(&id_priv->id);
1804 return ret;
1805 }
1806 out:
1807 mutex_unlock(&id_priv->handler_mutex);
1808 return ret;
1809 }
1810
1811 static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
1812 struct ib_cm_event *ib_event,
1813 struct net_device *net_dev)
1814 {
1815 struct rdma_id_private *id_priv;
1816 struct rdma_cm_id *id;
1817 struct rdma_route *rt;
1818 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
1819 struct sa_path_rec *path = ib_event->param.req_rcvd.primary_path;
1820 const __be64 service_id =
1821 ib_event->param.req_rcvd.primary_path->service_id;
1822 int ret;
1823
1824 id = rdma_create_id(listen_id->route.addr.dev_addr.net,
1825 listen_id->event_handler, listen_id->context,
1826 listen_id->ps, ib_event->param.req_rcvd.qp_type);
1827 if (IS_ERR(id))
1828 return NULL;
1829
1830 id_priv = container_of(id, struct rdma_id_private, id);
1831 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
1832 (struct sockaddr *)&id->route.addr.dst_addr,
1833 listen_id, ib_event, ss_family, service_id))
1834 goto err;
1835
1836 rt = &id->route;
1837 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
1838 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1839 GFP_KERNEL);
1840 if (!rt->path_rec)
1841 goto err;
1842
1843 rt->path_rec[0] = *path;
1844 if (rt->num_paths == 2)
1845 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1846
1847 if (net_dev) {
1848 ret = rdma_copy_addr(&rt->addr.dev_addr, net_dev, NULL);
1849 if (ret)
1850 goto err;
1851 } else {
1852 if (!cma_protocol_roce(listen_id) &&
1853 cma_any_addr(cma_src_addr(id_priv))) {
1854 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
1855 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
1856 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
1857 } else if (!cma_any_addr(cma_src_addr(id_priv))) {
1858 ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr);
1859 if (ret)
1860 goto err;
1861 }
1862 }
1863 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
1864
1865 id_priv->state = RDMA_CM_CONNECT;
1866 return id_priv;
1867
1868 err:
1869 rdma_destroy_id(id);
1870 return NULL;
1871 }
1872
1873 static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1874 struct ib_cm_event *ib_event,
1875 struct net_device *net_dev)
1876 {
1877 struct rdma_id_private *id_priv;
1878 struct rdma_cm_id *id;
1879 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
1880 struct net *net = listen_id->route.addr.dev_addr.net;
1881 int ret;
1882
1883 id = rdma_create_id(net, listen_id->event_handler, listen_id->context,
1884 listen_id->ps, IB_QPT_UD);
1885 if (IS_ERR(id))
1886 return NULL;
1887
1888 id_priv = container_of(id, struct rdma_id_private, id);
1889 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
1890 (struct sockaddr *)&id->route.addr.dst_addr,
1891 listen_id, ib_event, ss_family,
1892 ib_event->param.sidr_req_rcvd.service_id))
1893 goto err;
1894
1895 if (net_dev) {
1896 ret = rdma_copy_addr(&id->route.addr.dev_addr, net_dev, NULL);
1897 if (ret)
1898 goto err;
1899 } else {
1900 if (!cma_any_addr(cma_src_addr(id_priv))) {
1901 ret = cma_translate_addr(cma_src_addr(id_priv),
1902 &id->route.addr.dev_addr);
1903 if (ret)
1904 goto err;
1905 }
1906 }
1907
1908 id_priv->state = RDMA_CM_CONNECT;
1909 return id_priv;
1910 err:
1911 rdma_destroy_id(id);
1912 return NULL;
1913 }
1914
1915 static void cma_set_req_event_data(struct rdma_cm_event *event,
1916 struct ib_cm_req_event_param *req_data,
1917 void *private_data, int offset)
1918 {
1919 event->param.conn.private_data = private_data + offset;
1920 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1921 event->param.conn.responder_resources = req_data->responder_resources;
1922 event->param.conn.initiator_depth = req_data->initiator_depth;
1923 event->param.conn.flow_control = req_data->flow_control;
1924 event->param.conn.retry_count = req_data->retry_count;
1925 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1926 event->param.conn.srq = req_data->srq;
1927 event->param.conn.qp_num = req_data->remote_qpn;
1928 }
1929
1930 static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event)
1931 {
1932 return (((ib_event->event == IB_CM_REQ_RECEIVED) &&
1933 (ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
1934 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
1935 (id->qp_type == IB_QPT_UD)) ||
1936 (!id->qp_type));
1937 }
1938
1939 static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1940 {
1941 struct rdma_id_private *listen_id, *conn_id = NULL;
1942 struct rdma_cm_event event;
1943 struct net_device *net_dev;
1944 int offset, ret;
1945
1946 listen_id = cma_id_from_event(cm_id, ib_event, &net_dev);
1947 if (IS_ERR(listen_id))
1948 return PTR_ERR(listen_id);
1949
1950 if (!cma_check_req_qp_type(&listen_id->id, ib_event)) {
1951 ret = -EINVAL;
1952 goto net_dev_put;
1953 }
1954
1955 mutex_lock(&listen_id->handler_mutex);
1956 if (listen_id->state != RDMA_CM_LISTEN) {
1957 ret = -ECONNABORTED;
1958 goto err1;
1959 }
1960
1961 memset(&event, 0, sizeof event);
1962 offset = cma_user_data_offset(listen_id);
1963 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1964 if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
1965 conn_id = cma_new_udp_id(&listen_id->id, ib_event, net_dev);
1966 event.param.ud.private_data = ib_event->private_data + offset;
1967 event.param.ud.private_data_len =
1968 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1969 } else {
1970 conn_id = cma_new_conn_id(&listen_id->id, ib_event, net_dev);
1971 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1972 ib_event->private_data, offset);
1973 }
1974 if (!conn_id) {
1975 ret = -ENOMEM;
1976 goto err1;
1977 }
1978
1979 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1980 ret = cma_acquire_dev(conn_id, listen_id);
1981 if (ret)
1982 goto err2;
1983
1984 conn_id->cm_id.ib = cm_id;
1985 cm_id->context = conn_id;
1986 cm_id->cm_handler = cma_ib_handler;
1987
1988 /*
1989 * Protect against the user destroying conn_id from another thread
1990 * until we're done accessing it.
1991 */
1992 atomic_inc(&conn_id->refcount);
1993 ret = conn_id->id.event_handler(&conn_id->id, &event);
1994 if (ret)
1995 goto err3;
1996 /*
1997 * Acquire mutex to prevent user executing rdma_destroy_id()
1998 * while we're accessing the cm_id.
1999 */
2000 mutex_lock(&lock);
2001 if (cma_comp(conn_id, RDMA_CM_CONNECT) &&
2002 (conn_id->id.qp_type != IB_QPT_UD))
2003 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
2004 mutex_unlock(&lock);
2005 mutex_unlock(&conn_id->handler_mutex);
2006 mutex_unlock(&listen_id->handler_mutex);
2007 cma_deref_id(conn_id);
2008 if (net_dev)
2009 dev_put(net_dev);
2010 return 0;
2011
2012 err3:
2013 cma_deref_id(conn_id);
2014 /* Destroy the CM ID by returning a non-zero value. */
2015 conn_id->cm_id.ib = NULL;
2016 err2:
2017 cma_exch(conn_id, RDMA_CM_DESTROYING);
2018 mutex_unlock(&conn_id->handler_mutex);
2019 err1:
2020 mutex_unlock(&listen_id->handler_mutex);
2021 if (conn_id)
2022 rdma_destroy_id(&conn_id->id);
2023
2024 net_dev_put:
2025 if (net_dev)
2026 dev_put(net_dev);
2027
2028 return ret;
2029 }
2030
2031 __be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr)
2032 {
2033 if (addr->sa_family == AF_IB)
2034 return ((struct sockaddr_ib *) addr)->sib_sid;
2035
2036 return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr)));
2037 }
2038 EXPORT_SYMBOL(rdma_get_service_id);
2039
2040 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
2041 {
2042 struct rdma_id_private *id_priv = iw_id->context;
2043 struct rdma_cm_event event;
2044 int ret = 0;
2045 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
2046 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
2047
2048 mutex_lock(&id_priv->handler_mutex);
2049 if (id_priv->state != RDMA_CM_CONNECT)
2050 goto out;
2051
2052 memset(&event, 0, sizeof event);
2053 switch (iw_event->event) {
2054 case IW_CM_EVENT_CLOSE:
2055 event.event = RDMA_CM_EVENT_DISCONNECTED;
2056 break;
2057 case IW_CM_EVENT_CONNECT_REPLY:
2058 memcpy(cma_src_addr(id_priv), laddr,
2059 rdma_addr_size(laddr));
2060 memcpy(cma_dst_addr(id_priv), raddr,
2061 rdma_addr_size(raddr));
2062 switch (iw_event->status) {
2063 case 0:
2064 event.event = RDMA_CM_EVENT_ESTABLISHED;
2065 event.param.conn.initiator_depth = iw_event->ird;
2066 event.param.conn.responder_resources = iw_event->ord;
2067 break;
2068 case -ECONNRESET:
2069 case -ECONNREFUSED:
2070 event.event = RDMA_CM_EVENT_REJECTED;
2071 break;
2072 case -ETIMEDOUT:
2073 event.event = RDMA_CM_EVENT_UNREACHABLE;
2074 break;
2075 default:
2076 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
2077 break;
2078 }
2079 break;
2080 case IW_CM_EVENT_ESTABLISHED:
2081 event.event = RDMA_CM_EVENT_ESTABLISHED;
2082 event.param.conn.initiator_depth = iw_event->ird;
2083 event.param.conn.responder_resources = iw_event->ord;
2084 break;
2085 default:
2086 BUG_ON(1);
2087 }
2088
2089 event.status = iw_event->status;
2090 event.param.conn.private_data = iw_event->private_data;
2091 event.param.conn.private_data_len = iw_event->private_data_len;
2092 ret = id_priv->id.event_handler(&id_priv->id, &event);
2093 if (ret) {
2094 /* Destroy the CM ID by returning a non-zero value. */
2095 id_priv->cm_id.iw = NULL;
2096 cma_exch(id_priv, RDMA_CM_DESTROYING);
2097 mutex_unlock(&id_priv->handler_mutex);
2098 rdma_destroy_id(&id_priv->id);
2099 return ret;
2100 }
2101
2102 out:
2103 mutex_unlock(&id_priv->handler_mutex);
2104 return ret;
2105 }
2106
2107 static int iw_conn_req_handler(struct iw_cm_id *cm_id,
2108 struct iw_cm_event *iw_event)
2109 {
2110 struct rdma_cm_id *new_cm_id;
2111 struct rdma_id_private *listen_id, *conn_id;
2112 struct rdma_cm_event event;
2113 int ret = -ECONNABORTED;
2114 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
2115 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
2116
2117 listen_id = cm_id->context;
2118
2119 mutex_lock(&listen_id->handler_mutex);
2120 if (listen_id->state != RDMA_CM_LISTEN)
2121 goto out;
2122
2123 /* Create a new RDMA id for the new IW CM ID */
2124 new_cm_id = rdma_create_id(listen_id->id.route.addr.dev_addr.net,
2125 listen_id->id.event_handler,
2126 listen_id->id.context,
2127 RDMA_PS_TCP, IB_QPT_RC);
2128 if (IS_ERR(new_cm_id)) {
2129 ret = -ENOMEM;
2130 goto out;
2131 }
2132 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
2133 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
2134 conn_id->state = RDMA_CM_CONNECT;
2135
2136 ret = rdma_translate_ip(laddr, &conn_id->id.route.addr.dev_addr, NULL);
2137 if (ret) {
2138 mutex_unlock(&conn_id->handler_mutex);
2139 rdma_destroy_id(new_cm_id);
2140 goto out;
2141 }
2142
2143 ret = cma_acquire_dev(conn_id, listen_id);
2144 if (ret) {
2145 mutex_unlock(&conn_id->handler_mutex);
2146 rdma_destroy_id(new_cm_id);
2147 goto out;
2148 }
2149
2150 conn_id->cm_id.iw = cm_id;
2151 cm_id->context = conn_id;
2152 cm_id->cm_handler = cma_iw_handler;
2153
2154 memcpy(cma_src_addr(conn_id), laddr, rdma_addr_size(laddr));
2155 memcpy(cma_dst_addr(conn_id), raddr, rdma_addr_size(raddr));
2156
2157 memset(&event, 0, sizeof event);
2158 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
2159 event.param.conn.private_data = iw_event->private_data;
2160 event.param.conn.private_data_len = iw_event->private_data_len;
2161 event.param.conn.initiator_depth = iw_event->ird;
2162 event.param.conn.responder_resources = iw_event->ord;
2163
2164 /*
2165 * Protect against the user destroying conn_id from another thread
2166 * until we're done accessing it.
2167 */
2168 atomic_inc(&conn_id->refcount);
2169 ret = conn_id->id.event_handler(&conn_id->id, &event);
2170 if (ret) {
2171 /* User wants to destroy the CM ID */
2172 conn_id->cm_id.iw = NULL;
2173 cma_exch(conn_id, RDMA_CM_DESTROYING);
2174 mutex_unlock(&conn_id->handler_mutex);
2175 cma_deref_id(conn_id);
2176 rdma_destroy_id(&conn_id->id);
2177 goto out;
2178 }
2179
2180 mutex_unlock(&conn_id->handler_mutex);
2181 cma_deref_id(conn_id);
2182
2183 out:
2184 mutex_unlock(&listen_id->handler_mutex);
2185 return ret;
2186 }
2187
2188 static int cma_ib_listen(struct rdma_id_private *id_priv)
2189 {
2190 struct sockaddr *addr;
2191 struct ib_cm_id *id;
2192 __be64 svc_id;
2193
2194 addr = cma_src_addr(id_priv);
2195 svc_id = rdma_get_service_id(&id_priv->id, addr);
2196 id = ib_cm_insert_listen(id_priv->id.device, cma_req_handler, svc_id);
2197 if (IS_ERR(id))
2198 return PTR_ERR(id);
2199 id_priv->cm_id.ib = id;
2200
2201 return 0;
2202 }
2203
2204 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
2205 {
2206 int ret;
2207 struct iw_cm_id *id;
2208
2209 id = iw_create_cm_id(id_priv->id.device,
2210 iw_conn_req_handler,
2211 id_priv);
2212 if (IS_ERR(id))
2213 return PTR_ERR(id);
2214
2215 id->tos = id_priv->tos;
2216 id_priv->cm_id.iw = id;
2217
2218 memcpy(&id_priv->cm_id.iw->local_addr, cma_src_addr(id_priv),
2219 rdma_addr_size(cma_src_addr(id_priv)));
2220
2221 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
2222
2223 if (ret) {
2224 iw_destroy_cm_id(id_priv->cm_id.iw);
2225 id_priv->cm_id.iw = NULL;
2226 }
2227
2228 return ret;
2229 }
2230
2231 static int cma_listen_handler(struct rdma_cm_id *id,
2232 struct rdma_cm_event *event)
2233 {
2234 struct rdma_id_private *id_priv = id->context;
2235
2236 id->context = id_priv->id.context;
2237 id->event_handler = id_priv->id.event_handler;
2238 return id_priv->id.event_handler(id, event);
2239 }
2240
2241 static void cma_listen_on_dev(struct rdma_id_private *id_priv,
2242 struct cma_device *cma_dev)
2243 {
2244 struct rdma_id_private *dev_id_priv;
2245 struct rdma_cm_id *id;
2246 struct net *net = id_priv->id.route.addr.dev_addr.net;
2247 int ret;
2248
2249 if (cma_family(id_priv) == AF_IB && !rdma_cap_ib_cm(cma_dev->device, 1))
2250 return;
2251
2252 id = rdma_create_id(net, cma_listen_handler, id_priv, id_priv->id.ps,
2253 id_priv->id.qp_type);
2254 if (IS_ERR(id))
2255 return;
2256
2257 dev_id_priv = container_of(id, struct rdma_id_private, id);
2258
2259 dev_id_priv->state = RDMA_CM_ADDR_BOUND;
2260 memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv),
2261 rdma_addr_size(cma_src_addr(id_priv)));
2262
2263 _cma_attach_to_dev(dev_id_priv, cma_dev);
2264 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
2265 atomic_inc(&id_priv->refcount);
2266 dev_id_priv->internal_id = 1;
2267 dev_id_priv->afonly = id_priv->afonly;
2268
2269 ret = rdma_listen(id, id_priv->backlog);
2270 if (ret)
2271 pr_warn("RDMA CMA: cma_listen_on_dev, error %d, listening on device %s\n",
2272 ret, cma_dev->device->name);
2273 }
2274
2275 static void cma_listen_on_all(struct rdma_id_private *id_priv)
2276 {
2277 struct cma_device *cma_dev;
2278
2279 mutex_lock(&lock);
2280 list_add_tail(&id_priv->list, &listen_any_list);
2281 list_for_each_entry(cma_dev, &dev_list, list)
2282 cma_listen_on_dev(id_priv, cma_dev);
2283 mutex_unlock(&lock);
2284 }
2285
2286 void rdma_set_service_type(struct rdma_cm_id *id, int tos)
2287 {
2288 struct rdma_id_private *id_priv;
2289
2290 id_priv = container_of(id, struct rdma_id_private, id);
2291 id_priv->tos = (u8) tos;
2292 id_priv->tos_set = true;
2293 }
2294 EXPORT_SYMBOL(rdma_set_service_type);
2295
2296 static void cma_query_handler(int status, struct sa_path_rec *path_rec,
2297 void *context)
2298 {
2299 struct cma_work *work = context;
2300 struct rdma_route *route;
2301
2302 route = &work->id->id.route;
2303
2304 if (!status) {
2305 route->num_paths = 1;
2306 *route->path_rec = *path_rec;
2307 } else {
2308 work->old_state = RDMA_CM_ROUTE_QUERY;
2309 work->new_state = RDMA_CM_ADDR_RESOLVED;
2310 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
2311 work->event.status = status;
2312 pr_debug_ratelimited("RDMA CM: ROUTE_ERROR: failed to query path. status %d\n",
2313 status);
2314 }
2315
2316 queue_work(cma_wq, &work->work);
2317 }
2318
2319 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
2320 struct cma_work *work)
2321 {
2322 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2323 struct sa_path_rec path_rec;
2324 ib_sa_comp_mask comp_mask;
2325 struct sockaddr_in6 *sin6;
2326 struct sockaddr_ib *sib;
2327
2328 memset(&path_rec, 0, sizeof path_rec);
2329
2330 if (rdma_cap_opa_ah(id_priv->id.device, id_priv->id.port_num))
2331 path_rec.rec_type = SA_PATH_REC_TYPE_OPA;
2332 else
2333 path_rec.rec_type = SA_PATH_REC_TYPE_IB;
2334 rdma_addr_get_sgid(dev_addr, &path_rec.sgid);
2335 rdma_addr_get_dgid(dev_addr, &path_rec.dgid);
2336 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
2337 path_rec.numb_path = 1;
2338 path_rec.reversible = 1;
2339 path_rec.service_id = rdma_get_service_id(&id_priv->id,
2340 cma_dst_addr(id_priv));
2341
2342 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
2343 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
2344 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
2345
2346 switch (cma_family(id_priv)) {
2347 case AF_INET:
2348 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
2349 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
2350 break;
2351 case AF_INET6:
2352 sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
2353 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
2354 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2355 break;
2356 case AF_IB:
2357 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
2358 path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20);
2359 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2360 break;
2361 }
2362
2363 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
2364 id_priv->id.port_num, &path_rec,
2365 comp_mask, timeout_ms,
2366 GFP_KERNEL, cma_query_handler,
2367 work, &id_priv->query);
2368
2369 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
2370 }
2371
2372 static void cma_work_handler(struct work_struct *_work)
2373 {
2374 struct cma_work *work = container_of(_work, struct cma_work, work);
2375 struct rdma_id_private *id_priv = work->id;
2376 int destroy = 0;
2377
2378 mutex_lock(&id_priv->handler_mutex);
2379 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
2380 goto out;
2381
2382 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
2383 cma_exch(id_priv, RDMA_CM_DESTROYING);
2384 destroy = 1;
2385 }
2386 out:
2387 mutex_unlock(&id_priv->handler_mutex);
2388 cma_deref_id(id_priv);
2389 if (destroy)
2390 rdma_destroy_id(&id_priv->id);
2391 kfree(work);
2392 }
2393
2394 static void cma_ndev_work_handler(struct work_struct *_work)
2395 {
2396 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
2397 struct rdma_id_private *id_priv = work->id;
2398 int destroy = 0;
2399
2400 mutex_lock(&id_priv->handler_mutex);
2401 if (id_priv->state == RDMA_CM_DESTROYING ||
2402 id_priv->state == RDMA_CM_DEVICE_REMOVAL)
2403 goto out;
2404
2405 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
2406 cma_exch(id_priv, RDMA_CM_DESTROYING);
2407 destroy = 1;
2408 }
2409
2410 out:
2411 mutex_unlock(&id_priv->handler_mutex);
2412 cma_deref_id(id_priv);
2413 if (destroy)
2414 rdma_destroy_id(&id_priv->id);
2415 kfree(work);
2416 }
2417
2418 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
2419 {
2420 struct rdma_route *route = &id_priv->id.route;
2421 struct cma_work *work;
2422 int ret;
2423
2424 work = kzalloc(sizeof *work, GFP_KERNEL);
2425 if (!work)
2426 return -ENOMEM;
2427
2428 work->id = id_priv;
2429 INIT_WORK(&work->work, cma_work_handler);
2430 work->old_state = RDMA_CM_ROUTE_QUERY;
2431 work->new_state = RDMA_CM_ROUTE_RESOLVED;
2432 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2433
2434 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
2435 if (!route->path_rec) {
2436 ret = -ENOMEM;
2437 goto err1;
2438 }
2439
2440 ret = cma_query_ib_route(id_priv, timeout_ms, work);
2441 if (ret)
2442 goto err2;
2443
2444 return 0;
2445 err2:
2446 kfree(route->path_rec);
2447 route->path_rec = NULL;
2448 err1:
2449 kfree(work);
2450 return ret;
2451 }
2452
2453 int rdma_set_ib_paths(struct rdma_cm_id *id,
2454 struct sa_path_rec *path_rec, int num_paths)
2455 {
2456 struct rdma_id_private *id_priv;
2457 int ret;
2458
2459 id_priv = container_of(id, struct rdma_id_private, id);
2460 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2461 RDMA_CM_ROUTE_RESOLVED))
2462 return -EINVAL;
2463
2464 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths,
2465 GFP_KERNEL);
2466 if (!id->route.path_rec) {
2467 ret = -ENOMEM;
2468 goto err;
2469 }
2470
2471 id->route.num_paths = num_paths;
2472 return 0;
2473 err:
2474 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
2475 return ret;
2476 }
2477 EXPORT_SYMBOL(rdma_set_ib_paths);
2478
2479 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
2480 {
2481 struct cma_work *work;
2482
2483 work = kzalloc(sizeof *work, GFP_KERNEL);
2484 if (!work)
2485 return -ENOMEM;
2486
2487 work->id = id_priv;
2488 INIT_WORK(&work->work, cma_work_handler);
2489 work->old_state = RDMA_CM_ROUTE_QUERY;
2490 work->new_state = RDMA_CM_ROUTE_RESOLVED;
2491 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2492 queue_work(cma_wq, &work->work);
2493 return 0;
2494 }
2495
2496 static int iboe_tos_to_sl(struct net_device *ndev, int tos)
2497 {
2498 int prio;
2499 struct net_device *dev;
2500
2501 prio = rt_tos2priority(tos);
2502 dev = is_vlan_dev(ndev) ? vlan_dev_real_dev(ndev) : ndev;
2503 if (dev->num_tc)
2504 return netdev_get_prio_tc_map(dev, prio);
2505
2506 #if IS_ENABLED(CONFIG_VLAN_8021Q)
2507 if (is_vlan_dev(ndev))
2508 return (vlan_dev_get_egress_qos_mask(ndev, prio) &
2509 VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
2510 #endif
2511 return 0;
2512 }
2513
2514 static enum ib_gid_type cma_route_gid_type(enum rdma_network_type network_type,
2515 unsigned long supported_gids,
2516 enum ib_gid_type default_gid)
2517 {
2518 if ((network_type == RDMA_NETWORK_IPV4 ||
2519 network_type == RDMA_NETWORK_IPV6) &&
2520 test_bit(IB_GID_TYPE_ROCE_UDP_ENCAP, &supported_gids))
2521 return IB_GID_TYPE_ROCE_UDP_ENCAP;
2522
2523 return default_gid;
2524 }
2525
2526 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
2527 {
2528 struct rdma_route *route = &id_priv->id.route;
2529 struct rdma_addr *addr = &route->addr;
2530 struct cma_work *work;
2531 int ret;
2532 struct net_device *ndev = NULL;
2533 enum ib_gid_type gid_type = IB_GID_TYPE_IB;
2534 u8 default_roce_tos = id_priv->cma_dev->default_roce_tos[id_priv->id.port_num -
2535 rdma_start_port(id_priv->cma_dev->device)];
2536 u8 tos = id_priv->tos_set ? id_priv->tos : default_roce_tos;
2537
2538
2539 work = kzalloc(sizeof *work, GFP_KERNEL);
2540 if (!work)
2541 return -ENOMEM;
2542
2543 work->id = id_priv;
2544 INIT_WORK(&work->work, cma_work_handler);
2545
2546 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
2547 if (!route->path_rec) {
2548 ret = -ENOMEM;
2549 goto err1;
2550 }
2551
2552 route->num_paths = 1;
2553
2554 if (addr->dev_addr.bound_dev_if) {
2555 unsigned long supported_gids;
2556
2557 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if);
2558 if (!ndev) {
2559 ret = -ENODEV;
2560 goto err2;
2561 }
2562
2563 supported_gids = roce_gid_type_mask_support(id_priv->id.device,
2564 id_priv->id.port_num);
2565 gid_type = cma_route_gid_type(addr->dev_addr.network,
2566 supported_gids,
2567 id_priv->gid_type);
2568 route->path_rec->rec_type =
2569 sa_conv_gid_to_pathrec_type(gid_type);
2570 sa_path_set_ndev(route->path_rec, &init_net);
2571 sa_path_set_ifindex(route->path_rec, ndev->ifindex);
2572 }
2573 if (!ndev) {
2574 ret = -ENODEV;
2575 goto err2;
2576 }
2577
2578 sa_path_set_dmac(route->path_rec, addr->dev_addr.dst_dev_addr);
2579
2580 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
2581 &route->path_rec->sgid);
2582 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.dst_addr,
2583 &route->path_rec->dgid);
2584
2585 /* Use the hint from IP Stack to select GID Type */
2586 if (gid_type < ib_network_to_gid_type(addr->dev_addr.network))
2587 gid_type = ib_network_to_gid_type(addr->dev_addr.network);
2588 route->path_rec->rec_type = sa_conv_gid_to_pathrec_type(gid_type);
2589
2590 if (((struct sockaddr *)&id_priv->id.route.addr.dst_addr)->sa_family != AF_IB)
2591 /* TODO: get the hoplimit from the inet/inet6 device */
2592 route->path_rec->hop_limit = addr->dev_addr.hoplimit;
2593 else
2594 route->path_rec->hop_limit = 1;
2595 route->path_rec->reversible = 1;
2596 route->path_rec->pkey = cpu_to_be16(0xffff);
2597 route->path_rec->mtu_selector = IB_SA_EQ;
2598 route->path_rec->sl = iboe_tos_to_sl(ndev, tos);
2599 route->path_rec->traffic_class = tos;
2600 route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
2601 route->path_rec->rate_selector = IB_SA_EQ;
2602 route->path_rec->rate = iboe_get_rate(ndev);
2603 dev_put(ndev);
2604 route->path_rec->packet_life_time_selector = IB_SA_EQ;
2605 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
2606 if (!route->path_rec->mtu) {
2607 ret = -EINVAL;
2608 goto err2;
2609 }
2610
2611 work->old_state = RDMA_CM_ROUTE_QUERY;
2612 work->new_state = RDMA_CM_ROUTE_RESOLVED;
2613 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2614 work->event.status = 0;
2615
2616 queue_work(cma_wq, &work->work);
2617
2618 return 0;
2619
2620 err2:
2621 kfree(route->path_rec);
2622 route->path_rec = NULL;
2623 err1:
2624 kfree(work);
2625 return ret;
2626 }
2627
2628 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
2629 {
2630 struct rdma_id_private *id_priv;
2631 int ret;
2632
2633 id_priv = container_of(id, struct rdma_id_private, id);
2634 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
2635 return -EINVAL;
2636
2637 atomic_inc(&id_priv->refcount);
2638 if (rdma_cap_ib_sa(id->device, id->port_num))
2639 ret = cma_resolve_ib_route(id_priv, timeout_ms);
2640 else if (rdma_protocol_roce(id->device, id->port_num))
2641 ret = cma_resolve_iboe_route(id_priv);
2642 else if (rdma_protocol_iwarp(id->device, id->port_num))
2643 ret = cma_resolve_iw_route(id_priv, timeout_ms);
2644 else
2645 ret = -ENOSYS;
2646
2647 if (ret)
2648 goto err;
2649
2650 return 0;
2651 err:
2652 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
2653 cma_deref_id(id_priv);
2654 return ret;
2655 }
2656 EXPORT_SYMBOL(rdma_resolve_route);
2657
2658 static void cma_set_loopback(struct sockaddr *addr)
2659 {
2660 switch (addr->sa_family) {
2661 case AF_INET:
2662 ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
2663 break;
2664 case AF_INET6:
2665 ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr,
2666 0, 0, 0, htonl(1));
2667 break;
2668 default:
2669 ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr,
2670 0, 0, 0, htonl(1));
2671 break;
2672 }
2673 }
2674
2675 static int cma_bind_loopback(struct rdma_id_private *id_priv)
2676 {
2677 struct cma_device *cma_dev, *cur_dev;
2678 union ib_gid gid;
2679 enum ib_port_state port_state;
2680 u16 pkey;
2681 int ret;
2682 u8 p;
2683
2684 cma_dev = NULL;
2685 mutex_lock(&lock);
2686 list_for_each_entry(cur_dev, &dev_list, list) {
2687 if (cma_family(id_priv) == AF_IB &&
2688 !rdma_cap_ib_cm(cur_dev->device, 1))
2689 continue;
2690
2691 if (!cma_dev)
2692 cma_dev = cur_dev;
2693
2694 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
2695 if (!ib_get_cached_port_state(cur_dev->device, p, &port_state) &&
2696 port_state == IB_PORT_ACTIVE) {
2697 cma_dev = cur_dev;
2698 goto port_found;
2699 }
2700 }
2701 }
2702
2703 if (!cma_dev) {
2704 ret = -ENODEV;
2705 goto out;
2706 }
2707
2708 p = 1;
2709
2710 port_found:
2711 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid, NULL);
2712 if (ret)
2713 goto out;
2714
2715 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
2716 if (ret)
2717 goto out;
2718
2719 id_priv->id.route.addr.dev_addr.dev_type =
2720 (rdma_protocol_ib(cma_dev->device, p)) ?
2721 ARPHRD_INFINIBAND : ARPHRD_ETHER;
2722
2723 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2724 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
2725 id_priv->id.port_num = p;
2726 cma_attach_to_dev(id_priv, cma_dev);
2727 cma_set_loopback(cma_src_addr(id_priv));
2728 out:
2729 mutex_unlock(&lock);
2730 return ret;
2731 }
2732
2733 static void addr_handler(int status, struct sockaddr *src_addr,
2734 struct rdma_dev_addr *dev_addr, void *context)
2735 {
2736 struct rdma_id_private *id_priv = context;
2737 struct rdma_cm_event event;
2738
2739 memset(&event, 0, sizeof event);
2740 mutex_lock(&id_priv->handler_mutex);
2741 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
2742 RDMA_CM_ADDR_RESOLVED))
2743 goto out;
2744
2745 memcpy(cma_src_addr(id_priv), src_addr, rdma_addr_size(src_addr));
2746 if (!status && !id_priv->cma_dev) {
2747 status = cma_acquire_dev(id_priv, NULL);
2748 if (status)
2749 pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to acquire device. status %d\n",
2750 status);
2751 } else {
2752 pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to resolve IP. status %d\n", status);
2753 }
2754
2755 if (status) {
2756 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2757 RDMA_CM_ADDR_BOUND))
2758 goto out;
2759 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2760 event.status = status;
2761 } else
2762 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2763
2764 if (id_priv->id.event_handler(&id_priv->id, &event)) {
2765 cma_exch(id_priv, RDMA_CM_DESTROYING);
2766 mutex_unlock(&id_priv->handler_mutex);
2767 cma_deref_id(id_priv);
2768 rdma_destroy_id(&id_priv->id);
2769 return;
2770 }
2771 out:
2772 mutex_unlock(&id_priv->handler_mutex);
2773 cma_deref_id(id_priv);
2774 }
2775
2776 static int cma_resolve_loopback(struct rdma_id_private *id_priv)
2777 {
2778 struct cma_work *work;
2779 union ib_gid gid;
2780 int ret;
2781
2782 work = kzalloc(sizeof *work, GFP_KERNEL);
2783 if (!work)
2784 return -ENOMEM;
2785
2786 if (!id_priv->cma_dev) {
2787 ret = cma_bind_loopback(id_priv);
2788 if (ret)
2789 goto err;
2790 }
2791
2792 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2793 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
2794
2795 work->id = id_priv;
2796 INIT_WORK(&work->work, cma_work_handler);
2797 work->old_state = RDMA_CM_ADDR_QUERY;
2798 work->new_state = RDMA_CM_ADDR_RESOLVED;
2799 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2800 queue_work(cma_wq, &work->work);
2801 return 0;
2802 err:
2803 kfree(work);
2804 return ret;
2805 }
2806
2807 static int cma_resolve_ib_addr(struct rdma_id_private *id_priv)
2808 {
2809 struct cma_work *work;
2810 int ret;
2811
2812 work = kzalloc(sizeof *work, GFP_KERNEL);
2813 if (!work)
2814 return -ENOMEM;
2815
2816 if (!id_priv->cma_dev) {
2817 ret = cma_resolve_ib_dev(id_priv);
2818 if (ret)
2819 goto err;
2820 }
2821
2822 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *)
2823 &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr));
2824
2825 work->id = id_priv;
2826 INIT_WORK(&work->work, cma_work_handler);
2827 work->old_state = RDMA_CM_ADDR_QUERY;
2828 work->new_state = RDMA_CM_ADDR_RESOLVED;
2829 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2830 queue_work(cma_wq, &work->work);
2831 return 0;
2832 err:
2833 kfree(work);
2834 return ret;
2835 }
2836
2837 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2838 struct sockaddr *dst_addr)
2839 {
2840 if (!src_addr || !src_addr->sa_family) {
2841 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
2842 src_addr->sa_family = dst_addr->sa_family;
2843 if (IS_ENABLED(CONFIG_IPV6) &&
2844 dst_addr->sa_family == AF_INET6) {
2845 struct sockaddr_in6 *src_addr6 = (struct sockaddr_in6 *) src_addr;
2846 struct sockaddr_in6 *dst_addr6 = (struct sockaddr_in6 *) dst_addr;
2847 src_addr6->sin6_scope_id = dst_addr6->sin6_scope_id;
2848 if (ipv6_addr_type(&dst_addr6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
2849 id->route.addr.dev_addr.bound_dev_if = dst_addr6->sin6_scope_id;
2850 } else if (dst_addr->sa_family == AF_IB) {
2851 ((struct sockaddr_ib *) src_addr)->sib_pkey =
2852 ((struct sockaddr_ib *) dst_addr)->sib_pkey;
2853 }
2854 }
2855 return rdma_bind_addr(id, src_addr);
2856 }
2857
2858 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2859 struct sockaddr *dst_addr, int timeout_ms)
2860 {
2861 struct rdma_id_private *id_priv;
2862 int ret;
2863
2864 id_priv = container_of(id, struct rdma_id_private, id);
2865 memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr));
2866 if (id_priv->state == RDMA_CM_IDLE) {
2867 ret = cma_bind_addr(id, src_addr, dst_addr);
2868 if (ret) {
2869 memset(cma_dst_addr(id_priv), 0, rdma_addr_size(dst_addr));
2870 return ret;
2871 }
2872 }
2873
2874 if (cma_family(id_priv) != dst_addr->sa_family) {
2875 memset(cma_dst_addr(id_priv), 0, rdma_addr_size(dst_addr));
2876 return -EINVAL;
2877 }
2878
2879 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY)) {
2880 memset(cma_dst_addr(id_priv), 0, rdma_addr_size(dst_addr));
2881 return -EINVAL;
2882 }
2883
2884 atomic_inc(&id_priv->refcount);
2885 if (cma_any_addr(dst_addr)) {
2886 ret = cma_resolve_loopback(id_priv);
2887 } else {
2888 if (dst_addr->sa_family == AF_IB) {
2889 ret = cma_resolve_ib_addr(id_priv);
2890 } else {
2891 ret = rdma_resolve_ip(&addr_client, cma_src_addr(id_priv),
2892 dst_addr, &id->route.addr.dev_addr,
2893 timeout_ms, addr_handler, id_priv);
2894 }
2895 }
2896 if (ret)
2897 goto err;
2898
2899 return 0;
2900 err:
2901 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
2902 cma_deref_id(id_priv);
2903 return ret;
2904 }
2905 EXPORT_SYMBOL(rdma_resolve_addr);
2906
2907 int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
2908 {
2909 struct rdma_id_private *id_priv;
2910 unsigned long flags;
2911 int ret;
2912
2913 id_priv = container_of(id, struct rdma_id_private, id);
2914 spin_lock_irqsave(&id_priv->lock, flags);
2915 if (reuse || id_priv->state == RDMA_CM_IDLE) {
2916 id_priv->reuseaddr = reuse;
2917 ret = 0;
2918 } else {
2919 ret = -EINVAL;
2920 }
2921 spin_unlock_irqrestore(&id_priv->lock, flags);
2922 return ret;
2923 }
2924 EXPORT_SYMBOL(rdma_set_reuseaddr);
2925
2926 int rdma_set_afonly(struct rdma_cm_id *id, int afonly)
2927 {
2928 struct rdma_id_private *id_priv;
2929 unsigned long flags;
2930 int ret;
2931
2932 id_priv = container_of(id, struct rdma_id_private, id);
2933 spin_lock_irqsave(&id_priv->lock, flags);
2934 if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) {
2935 id_priv->options |= (1 << CMA_OPTION_AFONLY);
2936 id_priv->afonly = afonly;
2937 ret = 0;
2938 } else {
2939 ret = -EINVAL;
2940 }
2941 spin_unlock_irqrestore(&id_priv->lock, flags);
2942 return ret;
2943 }
2944 EXPORT_SYMBOL(rdma_set_afonly);
2945
2946 static void cma_bind_port(struct rdma_bind_list *bind_list,
2947 struct rdma_id_private *id_priv)
2948 {
2949 struct sockaddr *addr;
2950 struct sockaddr_ib *sib;
2951 u64 sid, mask;
2952 __be16 port;
2953
2954 addr = cma_src_addr(id_priv);
2955 port = htons(bind_list->port);
2956
2957 switch (addr->sa_family) {
2958 case AF_INET:
2959 ((struct sockaddr_in *) addr)->sin_port = port;
2960 break;
2961 case AF_INET6:
2962 ((struct sockaddr_in6 *) addr)->sin6_port = port;
2963 break;
2964 case AF_IB:
2965 sib = (struct sockaddr_ib *) addr;
2966 sid = be64_to_cpu(sib->sib_sid);
2967 mask = be64_to_cpu(sib->sib_sid_mask);
2968 sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port));
2969 sib->sib_sid_mask = cpu_to_be64(~0ULL);
2970 break;
2971 }
2972 id_priv->bind_list = bind_list;
2973 hlist_add_head(&id_priv->node, &bind_list->owners);
2974 }
2975
2976 static int cma_alloc_port(enum rdma_port_space ps,
2977 struct rdma_id_private *id_priv, unsigned short snum)
2978 {
2979 struct rdma_bind_list *bind_list;
2980 int ret;
2981
2982 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
2983 if (!bind_list)
2984 return -ENOMEM;
2985
2986 ret = cma_ps_alloc(id_priv->id.route.addr.dev_addr.net, ps, bind_list,
2987 snum);
2988 if (ret < 0)
2989 goto err;
2990
2991 bind_list->ps = ps;
2992 bind_list->port = (unsigned short)ret;
2993 cma_bind_port(bind_list, id_priv);
2994 return 0;
2995 err:
2996 kfree(bind_list);
2997 return ret == -ENOSPC ? -EADDRNOTAVAIL : ret;
2998 }
2999
3000 static int cma_port_is_unique(struct rdma_bind_list *bind_list,
3001 struct rdma_id_private *id_priv)
3002 {
3003 struct rdma_id_private *cur_id;
3004 struct sockaddr *daddr = cma_dst_addr(id_priv);
3005 struct sockaddr *saddr = cma_src_addr(id_priv);
3006 __be16 dport = cma_port(daddr);
3007
3008 hlist_for_each_entry(cur_id, &bind_list->owners, node) {
3009 struct sockaddr *cur_daddr = cma_dst_addr(cur_id);
3010 struct sockaddr *cur_saddr = cma_src_addr(cur_id);
3011 __be16 cur_dport = cma_port(cur_daddr);
3012
3013 if (id_priv == cur_id)
3014 continue;
3015
3016 /* different dest port -> unique */
3017 if (!cma_any_port(cur_daddr) &&
3018 (dport != cur_dport))
3019 continue;
3020
3021 /* different src address -> unique */
3022 if (!cma_any_addr(saddr) &&
3023 !cma_any_addr(cur_saddr) &&
3024 cma_addr_cmp(saddr, cur_saddr))
3025 continue;
3026
3027 /* different dst address -> unique */
3028 if (!cma_any_addr(cur_daddr) &&
3029 cma_addr_cmp(daddr, cur_daddr))
3030 continue;
3031
3032 return -EADDRNOTAVAIL;
3033 }
3034 return 0;
3035 }
3036
3037 static int cma_alloc_any_port(enum rdma_port_space ps,
3038 struct rdma_id_private *id_priv)
3039 {
3040 static unsigned int last_used_port;
3041 int low, high, remaining;
3042 unsigned int rover;
3043 struct net *net = id_priv->id.route.addr.dev_addr.net;
3044
3045 inet_get_local_port_range(net, &low, &high);
3046 remaining = (high - low) + 1;
3047 rover = prandom_u32() % remaining + low;
3048 retry:
3049 if (last_used_port != rover) {
3050 struct rdma_bind_list *bind_list;
3051 int ret;
3052
3053 bind_list = cma_ps_find(net, ps, (unsigned short)rover);
3054
3055 if (!bind_list) {
3056 ret = cma_alloc_port(ps, id_priv, rover);
3057 } else {
3058 ret = cma_port_is_unique(bind_list, id_priv);
3059 if (!ret)
3060 cma_bind_port(bind_list, id_priv);
3061 }
3062 /*
3063 * Remember previously used port number in order to avoid
3064 * re-using same port immediately after it is closed.
3065 */
3066 if (!ret)
3067 last_used_port = rover;
3068 if (ret != -EADDRNOTAVAIL)
3069 return ret;
3070 }
3071 if (--remaining) {
3072 rover++;
3073 if ((rover < low) || (rover > high))
3074 rover = low;
3075 goto retry;
3076 }
3077 return -EADDRNOTAVAIL;
3078 }
3079
3080 /*
3081 * Check that the requested port is available. This is called when trying to
3082 * bind to a specific port, or when trying to listen on a bound port. In
3083 * the latter case, the provided id_priv may already be on the bind_list, but
3084 * we still need to check that it's okay to start listening.
3085 */
3086 static int cma_check_port(struct rdma_bind_list *bind_list,
3087 struct rdma_id_private *id_priv, uint8_t reuseaddr)
3088 {
3089 struct rdma_id_private *cur_id;
3090 struct sockaddr *addr, *cur_addr;
3091
3092 addr = cma_src_addr(id_priv);
3093 hlist_for_each_entry(cur_id, &bind_list->owners, node) {
3094 if (id_priv == cur_id)
3095 continue;
3096
3097 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr &&
3098 cur_id->reuseaddr)
3099 continue;
3100
3101 cur_addr = cma_src_addr(cur_id);
3102 if (id_priv->afonly && cur_id->afonly &&
3103 (addr->sa_family != cur_addr->sa_family))
3104 continue;
3105
3106 if (cma_any_addr(addr) || cma_any_addr(cur_addr))
3107 return -EADDRNOTAVAIL;
3108
3109 if (!cma_addr_cmp(addr, cur_addr))
3110 return -EADDRINUSE;
3111 }
3112 return 0;
3113 }
3114
3115 static int cma_use_port(enum rdma_port_space ps,
3116 struct rdma_id_private *id_priv)
3117 {
3118 struct rdma_bind_list *bind_list;
3119 unsigned short snum;
3120 int ret;
3121
3122 snum = ntohs(cma_port(cma_src_addr(id_priv)));
3123 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
3124 return -EACCES;
3125
3126 bind_list = cma_ps_find(id_priv->id.route.addr.dev_addr.net, ps, snum);
3127 if (!bind_list) {
3128 ret = cma_alloc_port(ps, id_priv, snum);
3129 } else {
3130 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
3131 if (!ret)
3132 cma_bind_port(bind_list, id_priv);
3133 }
3134 return ret;
3135 }
3136
3137 static int cma_bind_listen(struct rdma_id_private *id_priv)
3138 {
3139 struct rdma_bind_list *bind_list = id_priv->bind_list;
3140 int ret = 0;
3141
3142 mutex_lock(&lock);
3143 if (bind_list->owners.first->next)
3144 ret = cma_check_port(bind_list, id_priv, 0);
3145 mutex_unlock(&lock);
3146 return ret;
3147 }
3148
3149 static enum rdma_port_space cma_select_inet_ps(
3150 struct rdma_id_private *id_priv)
3151 {
3152 switch (id_priv->id.ps) {
3153 case RDMA_PS_TCP:
3154 case RDMA_PS_UDP:
3155 case RDMA_PS_IPOIB:
3156 case RDMA_PS_IB:
3157 return id_priv->id.ps;
3158 default:
3159
3160 return 0;
3161 }
3162 }
3163
3164 static enum rdma_port_space cma_select_ib_ps(struct rdma_id_private *id_priv)
3165 {
3166 enum rdma_port_space ps = 0;
3167 struct sockaddr_ib *sib;
3168 u64 sid_ps, mask, sid;
3169
3170 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
3171 mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK;
3172 sid = be64_to_cpu(sib->sib_sid) & mask;
3173
3174 if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) {
3175 sid_ps = RDMA_IB_IP_PS_IB;
3176 ps = RDMA_PS_IB;
3177 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) &&
3178 (sid == (RDMA_IB_IP_PS_TCP & mask))) {
3179 sid_ps = RDMA_IB_IP_PS_TCP;
3180 ps = RDMA_PS_TCP;
3181 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) &&
3182 (sid == (RDMA_IB_IP_PS_UDP & mask))) {
3183 sid_ps = RDMA_IB_IP_PS_UDP;
3184 ps = RDMA_PS_UDP;
3185 }
3186
3187 if (ps) {
3188 sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib)));
3189 sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK |
3190 be64_to_cpu(sib->sib_sid_mask));
3191 }
3192 return ps;
3193 }
3194
3195 static int cma_get_port(struct rdma_id_private *id_priv)
3196 {
3197 enum rdma_port_space ps;
3198 int ret;
3199
3200 if (cma_family(id_priv) != AF_IB)
3201 ps = cma_select_inet_ps(id_priv);
3202 else
3203 ps = cma_select_ib_ps(id_priv);
3204 if (!ps)
3205 return -EPROTONOSUPPORT;
3206
3207 mutex_lock(&lock);
3208 if (cma_any_port(cma_src_addr(id_priv)))
3209 ret = cma_alloc_any_port(ps, id_priv);
3210 else
3211 ret = cma_use_port(ps, id_priv);
3212 mutex_unlock(&lock);
3213
3214 return ret;
3215 }
3216
3217 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
3218 struct sockaddr *addr)
3219 {
3220 #if IS_ENABLED(CONFIG_IPV6)
3221 struct sockaddr_in6 *sin6;
3222
3223 if (addr->sa_family != AF_INET6)
3224 return 0;
3225
3226 sin6 = (struct sockaddr_in6 *) addr;
3227
3228 if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL))
3229 return 0;
3230
3231 if (!sin6->sin6_scope_id)
3232 return -EINVAL;
3233
3234 dev_addr->bound_dev_if = sin6->sin6_scope_id;
3235 #endif
3236 return 0;
3237 }
3238
3239 int rdma_listen(struct rdma_cm_id *id, int backlog)
3240 {
3241 struct rdma_id_private *id_priv;
3242 int ret;
3243
3244 id_priv = container_of(id, struct rdma_id_private, id);
3245 if (id_priv->state == RDMA_CM_IDLE) {
3246 id->route.addr.src_addr.ss_family = AF_INET;
3247 ret = rdma_bind_addr(id, cma_src_addr(id_priv));
3248 if (ret)
3249 return ret;
3250 }
3251
3252 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
3253 return -EINVAL;
3254
3255 if (id_priv->reuseaddr) {
3256 ret = cma_bind_listen(id_priv);
3257 if (ret)
3258 goto err;
3259 }
3260
3261 id_priv->backlog = backlog;
3262 if (id->device) {
3263 if (rdma_cap_ib_cm(id->device, 1)) {
3264 ret = cma_ib_listen(id_priv);
3265 if (ret)
3266 goto err;
3267 } else if (rdma_cap_iw_cm(id->device, 1)) {
3268 ret = cma_iw_listen(id_priv, backlog);
3269 if (ret)
3270 goto err;
3271 } else {
3272 ret = -ENOSYS;
3273 goto err;
3274 }
3275 } else
3276 cma_listen_on_all(id_priv);
3277
3278 return 0;
3279 err:
3280 id_priv->backlog = 0;
3281 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
3282 return ret;
3283 }
3284 EXPORT_SYMBOL(rdma_listen);
3285
3286 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
3287 {
3288 struct rdma_id_private *id_priv;
3289 int ret;
3290 struct sockaddr *daddr;
3291
3292 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 &&
3293 addr->sa_family != AF_IB)
3294 return -EAFNOSUPPORT;
3295
3296 id_priv = container_of(id, struct rdma_id_private, id);
3297 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
3298 return -EINVAL;
3299
3300 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
3301 if (ret)
3302 goto err1;
3303
3304 memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr));
3305 if (!cma_any_addr(addr)) {
3306 ret = cma_translate_addr(addr, &id->route.addr.dev_addr);
3307 if (ret)
3308 goto err1;
3309
3310 ret = cma_acquire_dev(id_priv, NULL);
3311 if (ret)
3312 goto err1;
3313 }
3314
3315 if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) {
3316 if (addr->sa_family == AF_INET)
3317 id_priv->afonly = 1;
3318 #if IS_ENABLED(CONFIG_IPV6)
3319 else if (addr->sa_family == AF_INET6) {
3320 struct net *net = id_priv->id.route.addr.dev_addr.net;
3321
3322 id_priv->afonly = net->ipv6.sysctl.bindv6only;
3323 }
3324 #endif
3325 }
3326 ret = cma_get_port(id_priv);
3327 if (ret)
3328 goto err2;
3329
3330 daddr = cma_dst_addr(id_priv);
3331 daddr->sa_family = addr->sa_family;
3332
3333 return 0;
3334 err2:
3335 if (id_priv->cma_dev)
3336 cma_release_dev(id_priv);
3337 err1:
3338 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
3339 return ret;
3340 }
3341 EXPORT_SYMBOL(rdma_bind_addr);
3342
3343 static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv)
3344 {
3345 struct cma_hdr *cma_hdr;
3346
3347 cma_hdr = hdr;
3348 cma_hdr->cma_version = CMA_VERSION;
3349 if (cma_family(id_priv) == AF_INET) {
3350 struct sockaddr_in *src4, *dst4;
3351
3352 src4 = (struct sockaddr_in *) cma_src_addr(id_priv);
3353 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv);
3354
3355 cma_set_ip_ver(cma_hdr, 4);
3356 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
3357 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
3358 cma_hdr->port = src4->sin_port;
3359 } else if (cma_family(id_priv) == AF_INET6) {
3360 struct sockaddr_in6 *src6, *dst6;
3361
3362 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
3363 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv);
3364
3365 cma_set_ip_ver(cma_hdr, 6);
3366 cma_hdr->src_addr.ip6 = src6->sin6_addr;
3367 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
3368 cma_hdr->port = src6->sin6_port;
3369 }
3370 return 0;
3371 }
3372
3373 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
3374 struct ib_cm_event *ib_event)
3375 {
3376 struct rdma_id_private *id_priv = cm_id->context;
3377 struct rdma_cm_event event;
3378 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
3379 int ret = 0;
3380
3381 mutex_lock(&id_priv->handler_mutex);
3382 if (id_priv->state != RDMA_CM_CONNECT)
3383 goto out;
3384
3385 memset(&event, 0, sizeof event);
3386 switch (ib_event->event) {
3387 case IB_CM_SIDR_REQ_ERROR:
3388 event.event = RDMA_CM_EVENT_UNREACHABLE;
3389 event.status = -ETIMEDOUT;
3390 break;
3391 case IB_CM_SIDR_REP_RECEIVED:
3392 event.param.ud.private_data = ib_event->private_data;
3393 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
3394 if (rep->status != IB_SIDR_SUCCESS) {
3395 event.event = RDMA_CM_EVENT_UNREACHABLE;
3396 event.status = ib_event->param.sidr_rep_rcvd.status;
3397 pr_debug_ratelimited("RDMA CM: UNREACHABLE: bad SIDR reply. status %d\n",
3398 event.status);
3399 break;
3400 }
3401 ret = cma_set_qkey(id_priv, rep->qkey);
3402 if (ret) {
3403 pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to set qkey. status %d\n", ret);
3404 event.event = RDMA_CM_EVENT_ADDR_ERROR;
3405 event.status = ret;
3406 break;
3407 }
3408 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
3409 id_priv->id.route.path_rec,
3410 &event.param.ud.ah_attr);
3411 event.param.ud.qp_num = rep->qpn;
3412 event.param.ud.qkey = rep->qkey;
3413 event.event = RDMA_CM_EVENT_ESTABLISHED;
3414 event.status = 0;
3415 break;
3416 default:
3417 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
3418 ib_event->event);
3419 goto out;
3420 }
3421
3422 ret = id_priv->id.event_handler(&id_priv->id, &event);
3423 if (ret) {
3424 /* Destroy the CM ID by returning a non-zero value. */
3425 id_priv->cm_id.ib = NULL;
3426 cma_exch(id_priv, RDMA_CM_DESTROYING);
3427 mutex_unlock(&id_priv->handler_mutex);
3428 rdma_destroy_id(&id_priv->id);
3429 return ret;
3430 }
3431 out:
3432 mutex_unlock(&id_priv->handler_mutex);
3433 return ret;
3434 }
3435
3436 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
3437 struct rdma_conn_param *conn_param)
3438 {
3439 struct ib_cm_sidr_req_param req;
3440 struct ib_cm_id *id;
3441 void *private_data;
3442 int offset, ret;
3443
3444 memset(&req, 0, sizeof req);
3445 offset = cma_user_data_offset(id_priv);
3446 req.private_data_len = offset + conn_param->private_data_len;
3447 if (req.private_data_len < conn_param->private_data_len)
3448 return -EINVAL;
3449
3450 if (req.private_data_len) {
3451 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3452 if (!private_data)
3453 return -ENOMEM;
3454 } else {
3455 private_data = NULL;
3456 }
3457
3458 if (conn_param->private_data && conn_param->private_data_len)
3459 memcpy(private_data + offset, conn_param->private_data,
3460 conn_param->private_data_len);
3461
3462 if (private_data) {
3463 ret = cma_format_hdr(private_data, id_priv);
3464 if (ret)
3465 goto out;
3466 req.private_data = private_data;
3467 }
3468
3469 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
3470 id_priv);
3471 if (IS_ERR(id)) {
3472 ret = PTR_ERR(id);
3473 goto out;
3474 }
3475 id_priv->cm_id.ib = id;
3476
3477 req.path = id_priv->id.route.path_rec;
3478 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
3479 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
3480 req.max_cm_retries = CMA_MAX_CM_RETRIES;
3481
3482 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
3483 if (ret) {
3484 ib_destroy_cm_id(id_priv->cm_id.ib);
3485 id_priv->cm_id.ib = NULL;
3486 }
3487 out:
3488 kfree(private_data);
3489 return ret;
3490 }
3491
3492 static int cma_connect_ib(struct rdma_id_private *id_priv,
3493 struct rdma_conn_param *conn_param)
3494 {
3495 struct ib_cm_req_param req;
3496 struct rdma_route *route;
3497 void *private_data;
3498 struct ib_cm_id *id;
3499 int offset, 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 {
4003 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
4004 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
4005
4006 if (cma_any_addr(addr)) {
4007 memset(mgid, 0, sizeof *mgid);
4008 } else if (addr->sa_family == AF_INET6) {
4009 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
4010 } else {
4011 mgid->raw[0] = 0xff;
4012 mgid->raw[1] = 0x0e;
4013 mgid->raw[2] = 0;
4014 mgid->raw[3] = 0;
4015 mgid->raw[4] = 0;
4016 mgid->raw[5] = 0;
4017 mgid->raw[6] = 0;
4018 mgid->raw[7] = 0;
4019 mgid->raw[8] = 0;
4020 mgid->raw[9] = 0;
4021 mgid->raw[10] = 0xff;
4022 mgid->raw[11] = 0xff;
4023 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
4024 }
4025 }
4026
4027 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
4028 struct cma_multicast *mc)
4029 {
4030 struct iboe_mcast_work *work;
4031 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
4032 int err = 0;
4033 struct sockaddr *addr = (struct sockaddr *)&mc->addr;
4034 struct net_device *ndev = NULL;
4035 enum ib_gid_type gid_type;
4036 bool send_only;
4037
4038 send_only = mc->join_state == BIT(SENDONLY_FULLMEMBER_JOIN);
4039
4040 if (cma_zero_addr((struct sockaddr *)&mc->addr))
4041 return -EINVAL;
4042
4043 work = kzalloc(sizeof *work, GFP_KERNEL);
4044 if (!work)
4045 return -ENOMEM;
4046
4047 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
4048 if (!mc->multicast.ib) {
4049 err = -ENOMEM;
4050 goto out1;
4051 }
4052
4053 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid);
4054
4055 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
4056 if (id_priv->id.ps == RDMA_PS_UDP)
4057 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
4058
4059 if (dev_addr->bound_dev_if)
4060 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
4061 if (!ndev) {
4062 err = -ENODEV;
4063 goto out2;
4064 }
4065 mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
4066 mc->multicast.ib->rec.hop_limit = 1;
4067 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
4068
4069 gid_type = id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
4070 rdma_start_port(id_priv->cma_dev->device)];
4071 if (addr->sa_family == AF_INET) {
4072 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) {
4073 mc->multicast.ib->rec.hop_limit = IPV6_DEFAULT_HOPLIMIT;
4074 if (!send_only) {
4075 err = cma_igmp_send(ndev, &mc->multicast.ib->rec.mgid,
4076 true);
4077 if (!err)
4078 mc->igmp_joined = true;
4079 }
4080 }
4081 } else {
4082 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP)
4083 err = -ENOTSUPP;
4084 }
4085 dev_put(ndev);
4086 if (err || !mc->multicast.ib->rec.mtu) {
4087 if (!err)
4088 err = -EINVAL;
4089 goto out2;
4090 }
4091 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
4092 &mc->multicast.ib->rec.port_gid);
4093 work->id = id_priv;
4094 work->mc = mc;
4095 INIT_WORK(&work->work, iboe_mcast_work_handler);
4096 kref_get(&mc->mcref);
4097 queue_work(cma_wq, &work->work);
4098
4099 return 0;
4100
4101 out2:
4102 kfree(mc->multicast.ib);
4103 out1:
4104 kfree(work);
4105 return err;
4106 }
4107
4108 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
4109 u8 join_state, void *context)
4110 {
4111 struct rdma_id_private *id_priv;
4112 struct cma_multicast *mc;
4113 int ret;
4114
4115 id_priv = container_of(id, struct rdma_id_private, id);
4116 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
4117 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
4118 return -EINVAL;
4119
4120 mc = kmalloc(sizeof *mc, GFP_KERNEL);
4121 if (!mc)
4122 return -ENOMEM;
4123
4124 memcpy(&mc->addr, addr, rdma_addr_size(addr));
4125 mc->context = context;
4126 mc->id_priv = id_priv;
4127 mc->igmp_joined = false;
4128 mc->join_state = join_state;
4129 spin_lock(&id_priv->lock);
4130 list_add(&mc->list, &id_priv->mc_list);
4131 spin_unlock(&id_priv->lock);
4132
4133 if (rdma_protocol_roce(id->device, id->port_num)) {
4134 kref_init(&mc->mcref);
4135 ret = cma_iboe_join_multicast(id_priv, mc);
4136 } else if (rdma_cap_ib_mcast(id->device, id->port_num))
4137 ret = cma_join_ib_multicast(id_priv, mc);
4138 else
4139 ret = -ENOSYS;
4140
4141 if (ret) {
4142 spin_lock_irq(&id_priv->lock);
4143 list_del(&mc->list);
4144 spin_unlock_irq(&id_priv->lock);
4145 kfree(mc);
4146 }
4147 return ret;
4148 }
4149 EXPORT_SYMBOL(rdma_join_multicast);
4150
4151 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
4152 {
4153 struct rdma_id_private *id_priv;
4154 struct cma_multicast *mc;
4155
4156 id_priv = container_of(id, struct rdma_id_private, id);
4157 spin_lock_irq(&id_priv->lock);
4158 list_for_each_entry(mc, &id_priv->mc_list, list) {
4159 if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) {
4160 list_del(&mc->list);
4161 spin_unlock_irq(&id_priv->lock);
4162
4163 if (id->qp)
4164 ib_detach_mcast(id->qp,
4165 &mc->multicast.ib->rec.mgid,
4166 be16_to_cpu(mc->multicast.ib->rec.mlid));
4167
4168 BUG_ON(id_priv->cma_dev->device != id->device);
4169
4170 if (rdma_cap_ib_mcast(id->device, id->port_num)) {
4171 ib_sa_free_multicast(mc->multicast.ib);
4172 kfree(mc);
4173 } else if (rdma_protocol_roce(id->device, id->port_num)) {
4174 if (mc->igmp_joined) {
4175 struct rdma_dev_addr *dev_addr =
4176 &id->route.addr.dev_addr;
4177 struct net_device *ndev = NULL;
4178
4179 if (dev_addr->bound_dev_if)
4180 ndev = dev_get_by_index(&init_net,
4181 dev_addr->bound_dev_if);
4182 if (ndev) {
4183 cma_igmp_send(ndev,
4184 &mc->multicast.ib->rec.mgid,
4185 false);
4186 dev_put(ndev);
4187 }
4188 mc->igmp_joined = false;
4189 }
4190 kref_put(&mc->mcref, release_mc);
4191 }
4192 return;
4193 }
4194 }
4195 spin_unlock_irq(&id_priv->lock);
4196 }
4197 EXPORT_SYMBOL(rdma_leave_multicast);
4198
4199 static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
4200 {
4201 struct rdma_dev_addr *dev_addr;
4202 struct cma_ndev_work *work;
4203
4204 dev_addr = &id_priv->id.route.addr.dev_addr;
4205
4206 if ((dev_addr->bound_dev_if == ndev->ifindex) &&
4207 (net_eq(dev_net(ndev), dev_addr->net)) &&
4208 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
4209 pr_info("RDMA CM addr change for ndev %s used by id %p\n",
4210 ndev->name, &id_priv->id);
4211 work = kzalloc(sizeof *work, GFP_KERNEL);
4212 if (!work)
4213 return -ENOMEM;
4214
4215 INIT_WORK(&work->work, cma_ndev_work_handler);
4216 work->id = id_priv;
4217 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
4218 atomic_inc(&id_priv->refcount);
4219 queue_work(cma_wq, &work->work);
4220 }
4221
4222 return 0;
4223 }
4224
4225 static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
4226 void *ptr)
4227 {
4228 struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
4229 struct cma_device *cma_dev;
4230 struct rdma_id_private *id_priv;
4231 int ret = NOTIFY_DONE;
4232
4233 if (event != NETDEV_BONDING_FAILOVER)
4234 return NOTIFY_DONE;
4235
4236 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
4237 return NOTIFY_DONE;
4238
4239 mutex_lock(&lock);
4240 list_for_each_entry(cma_dev, &dev_list, list)
4241 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
4242 ret = cma_netdev_change(ndev, id_priv);
4243 if (ret)
4244 goto out;
4245 }
4246
4247 out:
4248 mutex_unlock(&lock);
4249 return ret;
4250 }
4251
4252 static struct notifier_block cma_nb = {
4253 .notifier_call = cma_netdev_callback
4254 };
4255
4256 static void cma_add_one(struct ib_device *device)
4257 {
4258 struct cma_device *cma_dev;
4259 struct rdma_id_private *id_priv;
4260 unsigned int i;
4261 unsigned long supported_gids = 0;
4262
4263 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
4264 if (!cma_dev)
4265 return;
4266
4267 cma_dev->device = device;
4268 cma_dev->default_gid_type = kcalloc(device->phys_port_cnt,
4269 sizeof(*cma_dev->default_gid_type),
4270 GFP_KERNEL);
4271 if (!cma_dev->default_gid_type)
4272 goto free_cma_dev;
4273
4274 cma_dev->default_roce_tos = kcalloc(device->phys_port_cnt,
4275 sizeof(*cma_dev->default_roce_tos),
4276 GFP_KERNEL);
4277 if (!cma_dev->default_roce_tos)
4278 goto free_gid_type;
4279
4280 for (i = rdma_start_port(device); i <= rdma_end_port(device); i++) {
4281 supported_gids = roce_gid_type_mask_support(device, i);
4282 WARN_ON(!supported_gids);
4283 cma_dev->default_gid_type[i - rdma_start_port(device)] =
4284 find_first_bit(&supported_gids, BITS_PER_LONG);
4285 cma_dev->default_roce_tos[i - rdma_start_port(device)] = 0;
4286 }
4287
4288 init_completion(&cma_dev->comp);
4289 atomic_set(&cma_dev->refcount, 1);
4290 INIT_LIST_HEAD(&cma_dev->id_list);
4291 ib_set_client_data(device, &cma_client, cma_dev);
4292
4293 mutex_lock(&lock);
4294 list_add_tail(&cma_dev->list, &dev_list);
4295 list_for_each_entry(id_priv, &listen_any_list, list)
4296 cma_listen_on_dev(id_priv, cma_dev);
4297 mutex_unlock(&lock);
4298
4299 return;
4300
4301 free_gid_type:
4302 kfree(cma_dev->default_gid_type);
4303
4304 free_cma_dev:
4305 kfree(cma_dev);
4306
4307 return;
4308 }
4309
4310 static int cma_remove_id_dev(struct rdma_id_private *id_priv)
4311 {
4312 struct rdma_cm_event event;
4313 enum rdma_cm_state state;
4314 int ret = 0;
4315
4316 /* Record that we want to remove the device */
4317 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
4318 if (state == RDMA_CM_DESTROYING)
4319 return 0;
4320
4321 cma_cancel_operation(id_priv, state);
4322 mutex_lock(&id_priv->handler_mutex);
4323
4324 /* Check for destruction from another callback. */
4325 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
4326 goto out;
4327
4328 memset(&event, 0, sizeof event);
4329 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
4330 ret = id_priv->id.event_handler(&id_priv->id, &event);
4331 out:
4332 mutex_unlock(&id_priv->handler_mutex);
4333 return ret;
4334 }
4335
4336 static void cma_process_remove(struct cma_device *cma_dev)
4337 {
4338 struct rdma_id_private *id_priv;
4339 int ret;
4340
4341 mutex_lock(&lock);
4342 while (!list_empty(&cma_dev->id_list)) {
4343 id_priv = list_entry(cma_dev->id_list.next,
4344 struct rdma_id_private, list);
4345
4346 list_del(&id_priv->listen_list);
4347 list_del_init(&id_priv->list);
4348 atomic_inc(&id_priv->refcount);
4349 mutex_unlock(&lock);
4350
4351 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
4352 cma_deref_id(id_priv);
4353 if (ret)
4354 rdma_destroy_id(&id_priv->id);
4355
4356 mutex_lock(&lock);
4357 }
4358 mutex_unlock(&lock);
4359
4360 cma_deref_dev(cma_dev);
4361 wait_for_completion(&cma_dev->comp);
4362 }
4363
4364 static void cma_remove_one(struct ib_device *device, void *client_data)
4365 {
4366 struct cma_device *cma_dev = client_data;
4367
4368 if (!cma_dev)
4369 return;
4370
4371 mutex_lock(&lock);
4372 list_del(&cma_dev->list);
4373 mutex_unlock(&lock);
4374
4375 cma_process_remove(cma_dev);
4376 kfree(cma_dev->default_roce_tos);
4377 kfree(cma_dev->default_gid_type);
4378 kfree(cma_dev);
4379 }
4380
4381 static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb)
4382 {
4383 struct nlmsghdr *nlh;
4384 struct rdma_cm_id_stats *id_stats;
4385 struct rdma_id_private *id_priv;
4386 struct rdma_cm_id *id = NULL;
4387 struct cma_device *cma_dev;
4388 int i_dev = 0, i_id = 0;
4389
4390 /*
4391 * We export all of the IDs as a sequence of messages. Each
4392 * ID gets its own netlink message.
4393 */
4394 mutex_lock(&lock);
4395
4396 list_for_each_entry(cma_dev, &dev_list, list) {
4397 if (i_dev < cb->args[0]) {
4398 i_dev++;
4399 continue;
4400 }
4401
4402 i_id = 0;
4403 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
4404 if (i_id < cb->args[1]) {
4405 i_id++;
4406 continue;
4407 }
4408
4409 id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq,
4410 sizeof *id_stats, RDMA_NL_RDMA_CM,
4411 RDMA_NL_RDMA_CM_ID_STATS,
4412 NLM_F_MULTI);
4413 if (!id_stats)
4414 goto out;
4415
4416 memset(id_stats, 0, sizeof *id_stats);
4417 id = &id_priv->id;
4418 id_stats->node_type = id->route.addr.dev_addr.dev_type;
4419 id_stats->port_num = id->port_num;
4420 id_stats->bound_dev_if =
4421 id->route.addr.dev_addr.bound_dev_if;
4422
4423 if (ibnl_put_attr(skb, nlh,
4424 rdma_addr_size(cma_src_addr(id_priv)),
4425 cma_src_addr(id_priv),
4426 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR))
4427 goto out;
4428 if (ibnl_put_attr(skb, nlh,
4429 rdma_addr_size(cma_src_addr(id_priv)),
4430 cma_dst_addr(id_priv),
4431 RDMA_NL_RDMA_CM_ATTR_DST_ADDR))
4432 goto out;
4433
4434 id_stats->pid = id_priv->owner;
4435 id_stats->port_space = id->ps;
4436 id_stats->cm_state = id_priv->state;
4437 id_stats->qp_num = id_priv->qp_num;
4438 id_stats->qp_type = id->qp_type;
4439
4440 i_id++;
4441 }
4442
4443 cb->args[1] = 0;
4444 i_dev++;
4445 }
4446
4447 out:
4448 mutex_unlock(&lock);
4449 cb->args[0] = i_dev;
4450 cb->args[1] = i_id;
4451
4452 return skb->len;
4453 }
4454
4455 static const struct ibnl_client_cbs cma_cb_table[] = {
4456 [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats,
4457 .module = THIS_MODULE },
4458 };
4459
4460 static int cma_init_net(struct net *net)
4461 {
4462 struct cma_pernet *pernet = cma_pernet(net);
4463
4464 idr_init(&pernet->tcp_ps);
4465 idr_init(&pernet->udp_ps);
4466 idr_init(&pernet->ipoib_ps);
4467 idr_init(&pernet->ib_ps);
4468
4469 return 0;
4470 }
4471
4472 static void cma_exit_net(struct net *net)
4473 {
4474 struct cma_pernet *pernet = cma_pernet(net);
4475
4476 idr_destroy(&pernet->tcp_ps);
4477 idr_destroy(&pernet->udp_ps);
4478 idr_destroy(&pernet->ipoib_ps);
4479 idr_destroy(&pernet->ib_ps);
4480 }
4481
4482 static struct pernet_operations cma_pernet_operations = {
4483 .init = cma_init_net,
4484 .exit = cma_exit_net,
4485 .id = &cma_pernet_id,
4486 .size = sizeof(struct cma_pernet),
4487 };
4488
4489 static int __init cma_init(void)
4490 {
4491 int ret;
4492
4493 cma_wq = alloc_ordered_workqueue("rdma_cm", WQ_MEM_RECLAIM);
4494 if (!cma_wq)
4495 return -ENOMEM;
4496
4497 ret = register_pernet_subsys(&cma_pernet_operations);
4498 if (ret)
4499 goto err_wq;
4500
4501 ib_sa_register_client(&sa_client);
4502 rdma_addr_register_client(&addr_client);
4503 register_netdevice_notifier(&cma_nb);
4504
4505 ret = ib_register_client(&cma_client);
4506 if (ret)
4507 goto err;
4508
4509 if (ibnl_add_client(RDMA_NL_RDMA_CM, ARRAY_SIZE(cma_cb_table),
4510 cma_cb_table))
4511 pr_warn("RDMA CMA: failed to add netlink callback\n");
4512 cma_configfs_init();
4513
4514 return 0;
4515
4516 err:
4517 unregister_netdevice_notifier(&cma_nb);
4518 rdma_addr_unregister_client(&addr_client);
4519 ib_sa_unregister_client(&sa_client);
4520 err_wq:
4521 destroy_workqueue(cma_wq);
4522 return ret;
4523 }
4524
4525 static void __exit cma_cleanup(void)
4526 {
4527 cma_configfs_exit();
4528 ibnl_remove_client(RDMA_NL_RDMA_CM);
4529 ib_unregister_client(&cma_client);
4530 unregister_netdevice_notifier(&cma_nb);
4531 rdma_addr_unregister_client(&addr_client);
4532 ib_sa_unregister_client(&sa_client);
4533 unregister_pernet_subsys(&cma_pernet_operations);
4534 destroy_workqueue(cma_wq);
4535 }
4536
4537 module_init(cma_init);
4538 module_exit(cma_cleanup);
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