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proc: Fix proc_sys_prune_dcache to hold a sb reference
[cris-mirror.git] / drivers / infiniband / core / cma.c
blob91b7a2fe5a55488ce1e5bb886ba19023bd624328
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 if (ndev && ndev->flags & IFF_LOOPBACK) {
629 pr_info("detected loopback device\n");
630 dev_put(ndev);
631
632 if (!device->get_netdev)
633 return -EOPNOTSUPP;
634
635 ndev = device->get_netdev(device, port);
636 if (!ndev)
637 return -ENODEV;
638 }
639 } else {
640 gid_type = IB_GID_TYPE_IB;
641 }
642
643 ret = ib_find_cached_gid_by_port(device, gid, gid_type, port,
644 ndev, NULL);
645
646 if (ndev)
647 dev_put(ndev);
648
649 return ret;
650 }
651
652 static int cma_acquire_dev(struct rdma_id_private *id_priv,
653 struct rdma_id_private *listen_id_priv)
654 {
655 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
656 struct cma_device *cma_dev;
657 union ib_gid gid, iboe_gid, *gidp;
658 int ret = -ENODEV;
659 u8 port;
660
661 if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
662 id_priv->id.ps == RDMA_PS_IPOIB)
663 return -EINVAL;
664
665 mutex_lock(&lock);
666 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
667 &iboe_gid);
668
669 memcpy(&gid, dev_addr->src_dev_addr +
670 rdma_addr_gid_offset(dev_addr), sizeof gid);
671
672 if (listen_id_priv) {
673 cma_dev = listen_id_priv->cma_dev;
674 port = listen_id_priv->id.port_num;
675 gidp = rdma_protocol_roce(cma_dev->device, port) ?
676 &iboe_gid : &gid;
677
678 ret = cma_validate_port(cma_dev->device, port,
679 rdma_protocol_ib(cma_dev->device, port) ?
680 IB_GID_TYPE_IB :
681 listen_id_priv->gid_type, gidp,
682 dev_addr->dev_type,
683 dev_addr->bound_dev_if);
684 if (!ret) {
685 id_priv->id.port_num = port;
686 goto out;
687 }
688 }
689
690 list_for_each_entry(cma_dev, &dev_list, list) {
691 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
692 if (listen_id_priv &&
693 listen_id_priv->cma_dev == cma_dev &&
694 listen_id_priv->id.port_num == port)
695 continue;
696
697 gidp = rdma_protocol_roce(cma_dev->device, port) ?
698 &iboe_gid : &gid;
699
700 ret = cma_validate_port(cma_dev->device, port,
701 rdma_protocol_ib(cma_dev->device, port) ?
702 IB_GID_TYPE_IB :
703 cma_dev->default_gid_type[port - 1],
704 gidp, dev_addr->dev_type,
705 dev_addr->bound_dev_if);
706 if (!ret) {
707 id_priv->id.port_num = port;
708 goto out;
709 }
710 }
711 }
712
713 out:
714 if (!ret)
715 cma_attach_to_dev(id_priv, cma_dev);
716
717 mutex_unlock(&lock);
718 return ret;
719 }
720
721 /*
722 * Select the source IB device and address to reach the destination IB address.
723 */
724 static int cma_resolve_ib_dev(struct rdma_id_private *id_priv)
725 {
726 struct cma_device *cma_dev, *cur_dev;
727 struct sockaddr_ib *addr;
728 union ib_gid gid, sgid, *dgid;
729 u16 pkey, index;
730 u8 p;
731 enum ib_port_state port_state;
732 int i;
733
734 cma_dev = NULL;
735 addr = (struct sockaddr_ib *) cma_dst_addr(id_priv);
736 dgid = (union ib_gid *) &addr->sib_addr;
737 pkey = ntohs(addr->sib_pkey);
738
739 list_for_each_entry(cur_dev, &dev_list, list) {
740 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
741 if (!rdma_cap_af_ib(cur_dev->device, p))
742 continue;
743
744 if (ib_find_cached_pkey(cur_dev->device, p, pkey, &index))
745 continue;
746
747 if (ib_get_cached_port_state(cur_dev->device, p, &port_state))
748 continue;
749 for (i = 0; !ib_get_cached_gid(cur_dev->device, p, i,
750 &gid, NULL);
751 i++) {
752 if (!memcmp(&gid, dgid, sizeof(gid))) {
753 cma_dev = cur_dev;
754 sgid = gid;
755 id_priv->id.port_num = p;
756 goto found;
757 }
758
759 if (!cma_dev && (gid.global.subnet_prefix ==
760 dgid->global.subnet_prefix) &&
761 port_state == IB_PORT_ACTIVE) {
762 cma_dev = cur_dev;
763 sgid = gid;
764 id_priv->id.port_num = p;
765 }
766 }
767 }
768 }
769
770 if (!cma_dev)
771 return -ENODEV;
772
773 found:
774 cma_attach_to_dev(id_priv, cma_dev);
775 addr = (struct sockaddr_ib *) cma_src_addr(id_priv);
776 memcpy(&addr->sib_addr, &sgid, sizeof sgid);
777 cma_translate_ib(addr, &id_priv->id.route.addr.dev_addr);
778 return 0;
779 }
780
781 static void cma_deref_id(struct rdma_id_private *id_priv)
782 {
783 if (atomic_dec_and_test(&id_priv->refcount))
784 complete(&id_priv->comp);
785 }
786
787 struct rdma_cm_id *rdma_create_id(struct net *net,
788 rdma_cm_event_handler event_handler,
789 void *context, enum rdma_port_space ps,
790 enum ib_qp_type qp_type)
791 {
792 struct rdma_id_private *id_priv;
793
794 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
795 if (!id_priv)
796 return ERR_PTR(-ENOMEM);
797
798 id_priv->owner = task_pid_nr(current);
799 id_priv->state = RDMA_CM_IDLE;
800 id_priv->id.context = context;
801 id_priv->id.event_handler = event_handler;
802 id_priv->id.ps = ps;
803 id_priv->id.qp_type = qp_type;
804 id_priv->tos_set = false;
805 spin_lock_init(&id_priv->lock);
806 mutex_init(&id_priv->qp_mutex);
807 init_completion(&id_priv->comp);
808 atomic_set(&id_priv->refcount, 1);
809 mutex_init(&id_priv->handler_mutex);
810 INIT_LIST_HEAD(&id_priv->listen_list);
811 INIT_LIST_HEAD(&id_priv->mc_list);
812 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
813 id_priv->id.route.addr.dev_addr.net = get_net(net);
814
815 return &id_priv->id;
816 }
817 EXPORT_SYMBOL(rdma_create_id);
818
819 static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
820 {
821 struct ib_qp_attr qp_attr;
822 int qp_attr_mask, ret;
823
824 qp_attr.qp_state = IB_QPS_INIT;
825 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
826 if (ret)
827 return ret;
828
829 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
830 if (ret)
831 return ret;
832
833 qp_attr.qp_state = IB_QPS_RTR;
834 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
835 if (ret)
836 return ret;
837
838 qp_attr.qp_state = IB_QPS_RTS;
839 qp_attr.sq_psn = 0;
840 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
841
842 return ret;
843 }
844
845 static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
846 {
847 struct ib_qp_attr qp_attr;
848 int qp_attr_mask, ret;
849
850 qp_attr.qp_state = IB_QPS_INIT;
851 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
852 if (ret)
853 return ret;
854
855 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
856 }
857
858 int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
859 struct ib_qp_init_attr *qp_init_attr)
860 {
861 struct rdma_id_private *id_priv;
862 struct ib_qp *qp;
863 int ret;
864
865 id_priv = container_of(id, struct rdma_id_private, id);
866 if (id->device != pd->device)
867 return -EINVAL;
868
869 qp_init_attr->port_num = id->port_num;
870 qp = ib_create_qp(pd, qp_init_attr);
871 if (IS_ERR(qp))
872 return PTR_ERR(qp);
873
874 if (id->qp_type == IB_QPT_UD)
875 ret = cma_init_ud_qp(id_priv, qp);
876 else
877 ret = cma_init_conn_qp(id_priv, qp);
878 if (ret)
879 goto err;
880
881 id->qp = qp;
882 id_priv->qp_num = qp->qp_num;
883 id_priv->srq = (qp->srq != NULL);
884 return 0;
885 err:
886 ib_destroy_qp(qp);
887 return ret;
888 }
889 EXPORT_SYMBOL(rdma_create_qp);
890
891 void rdma_destroy_qp(struct rdma_cm_id *id)
892 {
893 struct rdma_id_private *id_priv;
894
895 id_priv = container_of(id, struct rdma_id_private, id);
896 mutex_lock(&id_priv->qp_mutex);
897 ib_destroy_qp(id_priv->id.qp);
898 id_priv->id.qp = NULL;
899 mutex_unlock(&id_priv->qp_mutex);
900 }
901 EXPORT_SYMBOL(rdma_destroy_qp);
902
903 static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
904 struct rdma_conn_param *conn_param)
905 {
906 struct ib_qp_attr qp_attr;
907 int qp_attr_mask, ret;
908 union ib_gid sgid;
909
910 mutex_lock(&id_priv->qp_mutex);
911 if (!id_priv->id.qp) {
912 ret = 0;
913 goto out;
914 }
915
916 /* Need to update QP attributes from default values. */
917 qp_attr.qp_state = IB_QPS_INIT;
918 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
919 if (ret)
920 goto out;
921
922 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
923 if (ret)
924 goto out;
925
926 qp_attr.qp_state = IB_QPS_RTR;
927 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
928 if (ret)
929 goto out;
930
931 ret = ib_query_gid(id_priv->id.device, id_priv->id.port_num,
932 rdma_ah_read_grh(&qp_attr.ah_attr)->sgid_index,
933 &sgid, NULL);
934 if (ret)
935 goto out;
936
937 BUG_ON(id_priv->cma_dev->device != id_priv->id.device);
938
939 if (conn_param)
940 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
941 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
942 out:
943 mutex_unlock(&id_priv->qp_mutex);
944 return ret;
945 }
946
947 static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
948 struct rdma_conn_param *conn_param)
949 {
950 struct ib_qp_attr qp_attr;
951 int qp_attr_mask, ret;
952
953 mutex_lock(&id_priv->qp_mutex);
954 if (!id_priv->id.qp) {
955 ret = 0;
956 goto out;
957 }
958
959 qp_attr.qp_state = IB_QPS_RTS;
960 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
961 if (ret)
962 goto out;
963
964 if (conn_param)
965 qp_attr.max_rd_atomic = conn_param->initiator_depth;
966 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
967 out:
968 mutex_unlock(&id_priv->qp_mutex);
969 return ret;
970 }
971
972 static int cma_modify_qp_err(struct rdma_id_private *id_priv)
973 {
974 struct ib_qp_attr qp_attr;
975 int ret;
976
977 mutex_lock(&id_priv->qp_mutex);
978 if (!id_priv->id.qp) {
979 ret = 0;
980 goto out;
981 }
982
983 qp_attr.qp_state = IB_QPS_ERR;
984 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
985 out:
986 mutex_unlock(&id_priv->qp_mutex);
987 return ret;
988 }
989
990 static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
991 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
992 {
993 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
994 int ret;
995 u16 pkey;
996
997 if (rdma_cap_eth_ah(id_priv->id.device, id_priv->id.port_num))
998 pkey = 0xffff;
999 else
1000 pkey = ib_addr_get_pkey(dev_addr);
1001
1002 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
1003 pkey, &qp_attr->pkey_index);
1004 if (ret)
1005 return ret;
1006
1007 qp_attr->port_num = id_priv->id.port_num;
1008 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
1009
1010 if (id_priv->id.qp_type == IB_QPT_UD) {
1011 ret = cma_set_qkey(id_priv, 0);
1012 if (ret)
1013 return ret;
1014
1015 qp_attr->qkey = id_priv->qkey;
1016 *qp_attr_mask |= IB_QP_QKEY;
1017 } else {
1018 qp_attr->qp_access_flags = 0;
1019 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
1020 }
1021 return 0;
1022 }
1023
1024 int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
1025 int *qp_attr_mask)
1026 {
1027 struct rdma_id_private *id_priv;
1028 int ret = 0;
1029
1030 id_priv = container_of(id, struct rdma_id_private, id);
1031 if (rdma_cap_ib_cm(id->device, id->port_num)) {
1032 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
1033 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
1034 else
1035 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
1036 qp_attr_mask);
1037
1038 if (qp_attr->qp_state == IB_QPS_RTR)
1039 qp_attr->rq_psn = id_priv->seq_num;
1040 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
1041 if (!id_priv->cm_id.iw) {
1042 qp_attr->qp_access_flags = 0;
1043 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
1044 } else
1045 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
1046 qp_attr_mask);
1047 } else
1048 ret = -ENOSYS;
1049
1050 return ret;
1051 }
1052 EXPORT_SYMBOL(rdma_init_qp_attr);
1053
1054 static inline int cma_zero_addr(struct sockaddr *addr)
1055 {
1056 switch (addr->sa_family) {
1057 case AF_INET:
1058 return ipv4_is_zeronet(((struct sockaddr_in *)addr)->sin_addr.s_addr);
1059 case AF_INET6:
1060 return ipv6_addr_any(&((struct sockaddr_in6 *) addr)->sin6_addr);
1061 case AF_IB:
1062 return ib_addr_any(&((struct sockaddr_ib *) addr)->sib_addr);
1063 default:
1064 return 0;
1065 }
1066 }
1067
1068 static inline int cma_loopback_addr(struct sockaddr *addr)
1069 {
1070 switch (addr->sa_family) {
1071 case AF_INET:
1072 return ipv4_is_loopback(((struct sockaddr_in *) addr)->sin_addr.s_addr);
1073 case AF_INET6:
1074 return ipv6_addr_loopback(&((struct sockaddr_in6 *) addr)->sin6_addr);
1075 case AF_IB:
1076 return ib_addr_loopback(&((struct sockaddr_ib *) addr)->sib_addr);
1077 default:
1078 return 0;
1079 }
1080 }
1081
1082 static inline int cma_any_addr(struct sockaddr *addr)
1083 {
1084 return cma_zero_addr(addr) || cma_loopback_addr(addr);
1085 }
1086
1087 static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
1088 {
1089 if (src->sa_family != dst->sa_family)
1090 return -1;
1091
1092 switch (src->sa_family) {
1093 case AF_INET:
1094 return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
1095 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
1096 case AF_INET6:
1097 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
1098 &((struct sockaddr_in6 *) dst)->sin6_addr);
1099 default:
1100 return ib_addr_cmp(&((struct sockaddr_ib *) src)->sib_addr,
1101 &((struct sockaddr_ib *) dst)->sib_addr);
1102 }
1103 }
1104
1105 static __be16 cma_port(struct sockaddr *addr)
1106 {
1107 struct sockaddr_ib *sib;
1108
1109 switch (addr->sa_family) {
1110 case AF_INET:
1111 return ((struct sockaddr_in *) addr)->sin_port;
1112 case AF_INET6:
1113 return ((struct sockaddr_in6 *) addr)->sin6_port;
1114 case AF_IB:
1115 sib = (struct sockaddr_ib *) addr;
1116 return htons((u16) (be64_to_cpu(sib->sib_sid) &
1117 be64_to_cpu(sib->sib_sid_mask)));
1118 default:
1119 return 0;
1120 }
1121 }
1122
1123 static inline int cma_any_port(struct sockaddr *addr)
1124 {
1125 return !cma_port(addr);
1126 }
1127
1128 static void cma_save_ib_info(struct sockaddr *src_addr,
1129 struct sockaddr *dst_addr,
1130 struct rdma_cm_id *listen_id,
1131 struct sa_path_rec *path)
1132 {
1133 struct sockaddr_ib *listen_ib, *ib;
1134
1135 listen_ib = (struct sockaddr_ib *) &listen_id->route.addr.src_addr;
1136 if (src_addr) {
1137 ib = (struct sockaddr_ib *)src_addr;
1138 ib->sib_family = AF_IB;
1139 if (path) {
1140 ib->sib_pkey = path->pkey;
1141 ib->sib_flowinfo = path->flow_label;
1142 memcpy(&ib->sib_addr, &path->sgid, 16);
1143 ib->sib_sid = sa_path_get_service_id(path);
1144 ib->sib_scope_id = 0;
1145 } else {
1146 ib->sib_pkey = listen_ib->sib_pkey;
1147 ib->sib_flowinfo = listen_ib->sib_flowinfo;
1148 ib->sib_addr = listen_ib->sib_addr;
1149 ib->sib_sid = listen_ib->sib_sid;
1150 ib->sib_scope_id = listen_ib->sib_scope_id;
1151 }
1152 ib->sib_sid_mask = cpu_to_be64(0xffffffffffffffffULL);
1153 }
1154 if (dst_addr) {
1155 ib = (struct sockaddr_ib *)dst_addr;
1156 ib->sib_family = AF_IB;
1157 if (path) {
1158 ib->sib_pkey = path->pkey;
1159 ib->sib_flowinfo = path->flow_label;
1160 memcpy(&ib->sib_addr, &path->dgid, 16);
1161 }
1162 }
1163 }
1164
1165 static void cma_save_ip4_info(struct sockaddr_in *src_addr,
1166 struct sockaddr_in *dst_addr,
1167 struct cma_hdr *hdr,
1168 __be16 local_port)
1169 {
1170 if (src_addr) {
1171 *src_addr = (struct sockaddr_in) {
1172 .sin_family = AF_INET,
1173 .sin_addr.s_addr = hdr->dst_addr.ip4.addr,
1174 .sin_port = local_port,
1175 };
1176 }
1177
1178 if (dst_addr) {
1179 *dst_addr = (struct sockaddr_in) {
1180 .sin_family = AF_INET,
1181 .sin_addr.s_addr = hdr->src_addr.ip4.addr,
1182 .sin_port = hdr->port,
1183 };
1184 }
1185 }
1186
1187 static void cma_save_ip6_info(struct sockaddr_in6 *src_addr,
1188 struct sockaddr_in6 *dst_addr,
1189 struct cma_hdr *hdr,
1190 __be16 local_port)
1191 {
1192 if (src_addr) {
1193 *src_addr = (struct sockaddr_in6) {
1194 .sin6_family = AF_INET6,
1195 .sin6_addr = hdr->dst_addr.ip6,
1196 .sin6_port = local_port,
1197 };
1198 }
1199
1200 if (dst_addr) {
1201 *dst_addr = (struct sockaddr_in6) {
1202 .sin6_family = AF_INET6,
1203 .sin6_addr = hdr->src_addr.ip6,
1204 .sin6_port = hdr->port,
1205 };
1206 }
1207 }
1208
1209 static u16 cma_port_from_service_id(__be64 service_id)
1210 {
1211 return (u16)be64_to_cpu(service_id);
1212 }
1213
1214 static int cma_save_ip_info(struct sockaddr *src_addr,
1215 struct sockaddr *dst_addr,
1216 struct ib_cm_event *ib_event,
1217 __be64 service_id)
1218 {
1219 struct cma_hdr *hdr;
1220 __be16 port;
1221
1222 hdr = ib_event->private_data;
1223 if (hdr->cma_version != CMA_VERSION)
1224 return -EINVAL;
1225
1226 port = htons(cma_port_from_service_id(service_id));
1227
1228 switch (cma_get_ip_ver(hdr)) {
1229 case 4:
1230 cma_save_ip4_info((struct sockaddr_in *)src_addr,
1231 (struct sockaddr_in *)dst_addr, hdr, port);
1232 break;
1233 case 6:
1234 cma_save_ip6_info((struct sockaddr_in6 *)src_addr,
1235 (struct sockaddr_in6 *)dst_addr, hdr, port);
1236 break;
1237 default:
1238 return -EAFNOSUPPORT;
1239 }
1240
1241 return 0;
1242 }
1243
1244 static int cma_save_net_info(struct sockaddr *src_addr,
1245 struct sockaddr *dst_addr,
1246 struct rdma_cm_id *listen_id,
1247 struct ib_cm_event *ib_event,
1248 sa_family_t sa_family, __be64 service_id)
1249 {
1250 if (sa_family == AF_IB) {
1251 if (ib_event->event == IB_CM_REQ_RECEIVED)
1252 cma_save_ib_info(src_addr, dst_addr, listen_id,
1253 ib_event->param.req_rcvd.primary_path);
1254 else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED)
1255 cma_save_ib_info(src_addr, dst_addr, listen_id, NULL);
1256 return 0;
1257 }
1258
1259 return cma_save_ip_info(src_addr, dst_addr, ib_event, service_id);
1260 }
1261
1262 static int cma_save_req_info(const struct ib_cm_event *ib_event,
1263 struct cma_req_info *req)
1264 {
1265 const struct ib_cm_req_event_param *req_param =
1266 &ib_event->param.req_rcvd;
1267 const struct ib_cm_sidr_req_event_param *sidr_param =
1268 &ib_event->param.sidr_req_rcvd;
1269
1270 switch (ib_event->event) {
1271 case IB_CM_REQ_RECEIVED:
1272 req->device = req_param->listen_id->device;
1273 req->port = req_param->port;
1274 memcpy(&req->local_gid, &req_param->primary_path->sgid,
1275 sizeof(req->local_gid));
1276 req->has_gid = true;
1277 req->service_id =
1278 sa_path_get_service_id(req_param->primary_path);
1279 req->pkey = be16_to_cpu(req_param->primary_path->pkey);
1280 if (req->pkey != req_param->bth_pkey)
1281 pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and primary path P_Key (0x%x)\n"
1282 "RDMA CMA: in the future this may cause the request to be dropped\n",
1283 req_param->bth_pkey, req->pkey);
1284 break;
1285 case IB_CM_SIDR_REQ_RECEIVED:
1286 req->device = sidr_param->listen_id->device;
1287 req->port = sidr_param->port;
1288 req->has_gid = false;
1289 req->service_id = sidr_param->service_id;
1290 req->pkey = sidr_param->pkey;
1291 if (req->pkey != sidr_param->bth_pkey)
1292 pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and SIDR request payload P_Key (0x%x)\n"
1293 "RDMA CMA: in the future this may cause the request to be dropped\n",
1294 sidr_param->bth_pkey, req->pkey);
1295 break;
1296 default:
1297 return -EINVAL;
1298 }
1299
1300 return 0;
1301 }
1302
1303 static bool validate_ipv4_net_dev(struct net_device *net_dev,
1304 const struct sockaddr_in *dst_addr,
1305 const struct sockaddr_in *src_addr)
1306 {
1307 __be32 daddr = dst_addr->sin_addr.s_addr,
1308 saddr = src_addr->sin_addr.s_addr;
1309 struct fib_result res;
1310 struct flowi4 fl4;
1311 int err;
1312 bool ret;
1313
1314 if (ipv4_is_multicast(saddr) || ipv4_is_lbcast(saddr) ||
1315 ipv4_is_lbcast(daddr) || ipv4_is_zeronet(saddr) ||
1316 ipv4_is_zeronet(daddr) || ipv4_is_loopback(daddr) ||
1317 ipv4_is_loopback(saddr))
1318 return false;
1319
1320 memset(&fl4, 0, sizeof(fl4));
1321 fl4.flowi4_iif = net_dev->ifindex;
1322 fl4.daddr = daddr;
1323 fl4.saddr = saddr;
1324
1325 rcu_read_lock();
1326 err = fib_lookup(dev_net(net_dev), &fl4, &res, 0);
1327 ret = err == 0 && FIB_RES_DEV(res) == net_dev;
1328 rcu_read_unlock();
1329
1330 return ret;
1331 }
1332
1333 static bool validate_ipv6_net_dev(struct net_device *net_dev,
1334 const struct sockaddr_in6 *dst_addr,
1335 const struct sockaddr_in6 *src_addr)
1336 {
1337 #if IS_ENABLED(CONFIG_IPV6)
1338 const int strict = ipv6_addr_type(&dst_addr->sin6_addr) &
1339 IPV6_ADDR_LINKLOCAL;
1340 struct rt6_info *rt = rt6_lookup(dev_net(net_dev), &dst_addr->sin6_addr,
1341 &src_addr->sin6_addr, net_dev->ifindex,
1342 strict);
1343 bool ret;
1344
1345 if (!rt)
1346 return false;
1347
1348 ret = rt->rt6i_idev->dev == net_dev;
1349 ip6_rt_put(rt);
1350
1351 return ret;
1352 #else
1353 return false;
1354 #endif
1355 }
1356
1357 static bool validate_net_dev(struct net_device *net_dev,
1358 const struct sockaddr *daddr,
1359 const struct sockaddr *saddr)
1360 {
1361 const struct sockaddr_in *daddr4 = (const struct sockaddr_in *)daddr;
1362 const struct sockaddr_in *saddr4 = (const struct sockaddr_in *)saddr;
1363 const struct sockaddr_in6 *daddr6 = (const struct sockaddr_in6 *)daddr;
1364 const struct sockaddr_in6 *saddr6 = (const struct sockaddr_in6 *)saddr;
1365
1366 switch (daddr->sa_family) {
1367 case AF_INET:
1368 return saddr->sa_family == AF_INET &&
1369 validate_ipv4_net_dev(net_dev, daddr4, saddr4);
1370
1371 case AF_INET6:
1372 return saddr->sa_family == AF_INET6 &&
1373 validate_ipv6_net_dev(net_dev, daddr6, saddr6);
1374
1375 default:
1376 return false;
1377 }
1378 }
1379
1380 static struct net_device *cma_get_net_dev(struct ib_cm_event *ib_event,
1381 const struct cma_req_info *req)
1382 {
1383 struct sockaddr_storage listen_addr_storage, src_addr_storage;
1384 struct sockaddr *listen_addr = (struct sockaddr *)&listen_addr_storage,
1385 *src_addr = (struct sockaddr *)&src_addr_storage;
1386 struct net_device *net_dev;
1387 const union ib_gid *gid = req->has_gid ? &req->local_gid : NULL;
1388 int err;
1389
1390 err = cma_save_ip_info(listen_addr, src_addr, ib_event,
1391 req->service_id);
1392 if (err)
1393 return ERR_PTR(err);
1394
1395 net_dev = ib_get_net_dev_by_params(req->device, req->port, req->pkey,
1396 gid, listen_addr);
1397 if (!net_dev)
1398 return ERR_PTR(-ENODEV);
1399
1400 if (!validate_net_dev(net_dev, listen_addr, src_addr)) {
1401 dev_put(net_dev);
1402 return ERR_PTR(-EHOSTUNREACH);
1403 }
1404
1405 return net_dev;
1406 }
1407
1408 static enum rdma_port_space rdma_ps_from_service_id(__be64 service_id)
1409 {
1410 return (be64_to_cpu(service_id) >> 16) & 0xffff;
1411 }
1412
1413 static bool cma_match_private_data(struct rdma_id_private *id_priv,
1414 const struct cma_hdr *hdr)
1415 {
1416 struct sockaddr *addr = cma_src_addr(id_priv);
1417 __be32 ip4_addr;
1418 struct in6_addr ip6_addr;
1419
1420 if (cma_any_addr(addr) && !id_priv->afonly)
1421 return true;
1422
1423 switch (addr->sa_family) {
1424 case AF_INET:
1425 ip4_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
1426 if (cma_get_ip_ver(hdr) != 4)
1427 return false;
1428 if (!cma_any_addr(addr) &&
1429 hdr->dst_addr.ip4.addr != ip4_addr)
1430 return false;
1431 break;
1432 case AF_INET6:
1433 ip6_addr = ((struct sockaddr_in6 *)addr)->sin6_addr;
1434 if (cma_get_ip_ver(hdr) != 6)
1435 return false;
1436 if (!cma_any_addr(addr) &&
1437 memcmp(&hdr->dst_addr.ip6, &ip6_addr, sizeof(ip6_addr)))
1438 return false;
1439 break;
1440 case AF_IB:
1441 return true;
1442 default:
1443 return false;
1444 }
1445
1446 return true;
1447 }
1448
1449 static bool cma_protocol_roce_dev_port(struct ib_device *device, int port_num)
1450 {
1451 enum rdma_link_layer ll = rdma_port_get_link_layer(device, port_num);
1452 enum rdma_transport_type transport =
1453 rdma_node_get_transport(device->node_type);
1454
1455 return ll == IB_LINK_LAYER_ETHERNET && transport == RDMA_TRANSPORT_IB;
1456 }
1457
1458 static bool cma_protocol_roce(const struct rdma_cm_id *id)
1459 {
1460 struct ib_device *device = id->device;
1461 const int port_num = id->port_num ?: rdma_start_port(device);
1462
1463 return cma_protocol_roce_dev_port(device, port_num);
1464 }
1465
1466 static bool cma_match_net_dev(const struct rdma_cm_id *id,
1467 const struct net_device *net_dev,
1468 u8 port_num)
1469 {
1470 const struct rdma_addr *addr = &id->route.addr;
1471
1472 if (!net_dev)
1473 /* This request is an AF_IB request or a RoCE request */
1474 return (!id->port_num || id->port_num == port_num) &&
1475 (addr->src_addr.ss_family == AF_IB ||
1476 cma_protocol_roce_dev_port(id->device, port_num));
1477
1478 return !addr->dev_addr.bound_dev_if ||
1479 (net_eq(dev_net(net_dev), addr->dev_addr.net) &&
1480 addr->dev_addr.bound_dev_if == net_dev->ifindex);
1481 }
1482
1483 static struct rdma_id_private *cma_find_listener(
1484 const struct rdma_bind_list *bind_list,
1485 const struct ib_cm_id *cm_id,
1486 const struct ib_cm_event *ib_event,
1487 const struct cma_req_info *req,
1488 const struct net_device *net_dev)
1489 {
1490 struct rdma_id_private *id_priv, *id_priv_dev;
1491
1492 if (!bind_list)
1493 return ERR_PTR(-EINVAL);
1494
1495 hlist_for_each_entry(id_priv, &bind_list->owners, node) {
1496 if (cma_match_private_data(id_priv, ib_event->private_data)) {
1497 if (id_priv->id.device == cm_id->device &&
1498 cma_match_net_dev(&id_priv->id, net_dev, req->port))
1499 return id_priv;
1500 list_for_each_entry(id_priv_dev,
1501 &id_priv->listen_list,
1502 listen_list) {
1503 if (id_priv_dev->id.device == cm_id->device &&
1504 cma_match_net_dev(&id_priv_dev->id, net_dev, req->port))
1505 return id_priv_dev;
1506 }
1507 }
1508 }
1509
1510 return ERR_PTR(-EINVAL);
1511 }
1512
1513 static struct rdma_id_private *cma_id_from_event(struct ib_cm_id *cm_id,
1514 struct ib_cm_event *ib_event,
1515 struct net_device **net_dev)
1516 {
1517 struct cma_req_info req;
1518 struct rdma_bind_list *bind_list;
1519 struct rdma_id_private *id_priv;
1520 int err;
1521
1522 err = cma_save_req_info(ib_event, &req);
1523 if (err)
1524 return ERR_PTR(err);
1525
1526 *net_dev = cma_get_net_dev(ib_event, &req);
1527 if (IS_ERR(*net_dev)) {
1528 if (PTR_ERR(*net_dev) == -EAFNOSUPPORT) {
1529 /* Assuming the protocol is AF_IB */
1530 *net_dev = NULL;
1531 } else if (cma_protocol_roce_dev_port(req.device, req.port)) {
1532 /* TODO find the net dev matching the request parameters
1533 * through the RoCE GID table */
1534 *net_dev = NULL;
1535 } else {
1536 return ERR_CAST(*net_dev);
1537 }
1538 }
1539
1540 bind_list = cma_ps_find(*net_dev ? dev_net(*net_dev) : &init_net,
1541 rdma_ps_from_service_id(req.service_id),
1542 cma_port_from_service_id(req.service_id));
1543 id_priv = cma_find_listener(bind_list, cm_id, ib_event, &req, *net_dev);
1544 if (IS_ERR(id_priv) && *net_dev) {
1545 dev_put(*net_dev);
1546 *net_dev = NULL;
1547 }
1548
1549 return id_priv;
1550 }
1551
1552 static inline int cma_user_data_offset(struct rdma_id_private *id_priv)
1553 {
1554 return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr);
1555 }
1556
1557 static void cma_cancel_route(struct rdma_id_private *id_priv)
1558 {
1559 if (rdma_cap_ib_sa(id_priv->id.device, id_priv->id.port_num)) {
1560 if (id_priv->query)
1561 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
1562 }
1563 }
1564
1565 static void cma_cancel_listens(struct rdma_id_private *id_priv)
1566 {
1567 struct rdma_id_private *dev_id_priv;
1568
1569 /*
1570 * Remove from listen_any_list to prevent added devices from spawning
1571 * additional listen requests.
1572 */
1573 mutex_lock(&lock);
1574 list_del(&id_priv->list);
1575
1576 while (!list_empty(&id_priv->listen_list)) {
1577 dev_id_priv = list_entry(id_priv->listen_list.next,
1578 struct rdma_id_private, listen_list);
1579 /* sync with device removal to avoid duplicate destruction */
1580 list_del_init(&dev_id_priv->list);
1581 list_del(&dev_id_priv->listen_list);
1582 mutex_unlock(&lock);
1583
1584 rdma_destroy_id(&dev_id_priv->id);
1585 mutex_lock(&lock);
1586 }
1587 mutex_unlock(&lock);
1588 }
1589
1590 static void cma_cancel_operation(struct rdma_id_private *id_priv,
1591 enum rdma_cm_state state)
1592 {
1593 switch (state) {
1594 case RDMA_CM_ADDR_QUERY:
1595 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
1596 break;
1597 case RDMA_CM_ROUTE_QUERY:
1598 cma_cancel_route(id_priv);
1599 break;
1600 case RDMA_CM_LISTEN:
1601 if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev)
1602 cma_cancel_listens(id_priv);
1603 break;
1604 default:
1605 break;
1606 }
1607 }
1608
1609 static void cma_release_port(struct rdma_id_private *id_priv)
1610 {
1611 struct rdma_bind_list *bind_list = id_priv->bind_list;
1612 struct net *net = id_priv->id.route.addr.dev_addr.net;
1613
1614 if (!bind_list)
1615 return;
1616
1617 mutex_lock(&lock);
1618 hlist_del(&id_priv->node);
1619 if (hlist_empty(&bind_list->owners)) {
1620 cma_ps_remove(net, bind_list->ps, bind_list->port);
1621 kfree(bind_list);
1622 }
1623 mutex_unlock(&lock);
1624 }
1625
1626 static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
1627 {
1628 struct cma_multicast *mc;
1629
1630 while (!list_empty(&id_priv->mc_list)) {
1631 mc = container_of(id_priv->mc_list.next,
1632 struct cma_multicast, list);
1633 list_del(&mc->list);
1634 if (rdma_cap_ib_mcast(id_priv->cma_dev->device,
1635 id_priv->id.port_num)) {
1636 ib_sa_free_multicast(mc->multicast.ib);
1637 kfree(mc);
1638 } else {
1639 if (mc->igmp_joined) {
1640 struct rdma_dev_addr *dev_addr =
1641 &id_priv->id.route.addr.dev_addr;
1642 struct net_device *ndev = NULL;
1643
1644 if (dev_addr->bound_dev_if)
1645 ndev = dev_get_by_index(&init_net,
1646 dev_addr->bound_dev_if);
1647 if (ndev) {
1648 cma_igmp_send(ndev,
1649 &mc->multicast.ib->rec.mgid,
1650 false);
1651 dev_put(ndev);
1652 }
1653 }
1654 kref_put(&mc->mcref, release_mc);
1655 }
1656 }
1657 }
1658
1659 void rdma_destroy_id(struct rdma_cm_id *id)
1660 {
1661 struct rdma_id_private *id_priv;
1662 enum rdma_cm_state state;
1663
1664 id_priv = container_of(id, struct rdma_id_private, id);
1665 state = cma_exch(id_priv, RDMA_CM_DESTROYING);
1666 cma_cancel_operation(id_priv, state);
1667
1668 /*
1669 * Wait for any active callback to finish. New callbacks will find
1670 * the id_priv state set to destroying and abort.
1671 */
1672 mutex_lock(&id_priv->handler_mutex);
1673 mutex_unlock(&id_priv->handler_mutex);
1674
1675 if (id_priv->cma_dev) {
1676 if (rdma_cap_ib_cm(id_priv->id.device, 1)) {
1677 if (id_priv->cm_id.ib)
1678 ib_destroy_cm_id(id_priv->cm_id.ib);
1679 } else if (rdma_cap_iw_cm(id_priv->id.device, 1)) {
1680 if (id_priv->cm_id.iw)
1681 iw_destroy_cm_id(id_priv->cm_id.iw);
1682 }
1683 cma_leave_mc_groups(id_priv);
1684 cma_release_dev(id_priv);
1685 }
1686
1687 cma_release_port(id_priv);
1688 cma_deref_id(id_priv);
1689 wait_for_completion(&id_priv->comp);
1690
1691 if (id_priv->internal_id)
1692 cma_deref_id(id_priv->id.context);
1693
1694 kfree(id_priv->id.route.path_rec);
1695 put_net(id_priv->id.route.addr.dev_addr.net);
1696 kfree(id_priv);
1697 }
1698 EXPORT_SYMBOL(rdma_destroy_id);
1699
1700 static int cma_rep_recv(struct rdma_id_private *id_priv)
1701 {
1702 int ret;
1703
1704 ret = cma_modify_qp_rtr(id_priv, NULL);
1705 if (ret)
1706 goto reject;
1707
1708 ret = cma_modify_qp_rts(id_priv, NULL);
1709 if (ret)
1710 goto reject;
1711
1712 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
1713 if (ret)
1714 goto reject;
1715
1716 return 0;
1717 reject:
1718 pr_debug_ratelimited("RDMA CM: CONNECT_ERROR: failed to handle reply. status %d\n", ret);
1719 cma_modify_qp_err(id_priv);
1720 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
1721 NULL, 0, NULL, 0);
1722 return ret;
1723 }
1724
1725 static void cma_set_rep_event_data(struct rdma_cm_event *event,
1726 struct ib_cm_rep_event_param *rep_data,
1727 void *private_data)
1728 {
1729 event->param.conn.private_data = private_data;
1730 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
1731 event->param.conn.responder_resources = rep_data->responder_resources;
1732 event->param.conn.initiator_depth = rep_data->initiator_depth;
1733 event->param.conn.flow_control = rep_data->flow_control;
1734 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
1735 event->param.conn.srq = rep_data->srq;
1736 event->param.conn.qp_num = rep_data->remote_qpn;
1737 }
1738
1739 static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1740 {
1741 struct rdma_id_private *id_priv = cm_id->context;
1742 struct rdma_cm_event event;
1743 int ret = 0;
1744
1745 mutex_lock(&id_priv->handler_mutex);
1746 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
1747 id_priv->state != RDMA_CM_CONNECT) ||
1748 (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
1749 id_priv->state != RDMA_CM_DISCONNECT))
1750 goto out;
1751
1752 memset(&event, 0, sizeof event);
1753 switch (ib_event->event) {
1754 case IB_CM_REQ_ERROR:
1755 case IB_CM_REP_ERROR:
1756 event.event = RDMA_CM_EVENT_UNREACHABLE;
1757 event.status = -ETIMEDOUT;
1758 break;
1759 case IB_CM_REP_RECEIVED:
1760 if (cma_comp(id_priv, RDMA_CM_CONNECT) &&
1761 (id_priv->id.qp_type != IB_QPT_UD))
1762 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1763 if (id_priv->id.qp) {
1764 event.status = cma_rep_recv(id_priv);
1765 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1766 RDMA_CM_EVENT_ESTABLISHED;
1767 } else {
1768 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
1769 }
1770 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1771 ib_event->private_data);
1772 break;
1773 case IB_CM_RTU_RECEIVED:
1774 case IB_CM_USER_ESTABLISHED:
1775 event.event = RDMA_CM_EVENT_ESTABLISHED;
1776 break;
1777 case IB_CM_DREQ_ERROR:
1778 event.status = -ETIMEDOUT; /* fall through */
1779 case IB_CM_DREQ_RECEIVED:
1780 case IB_CM_DREP_RECEIVED:
1781 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
1782 RDMA_CM_DISCONNECT))
1783 goto out;
1784 event.event = RDMA_CM_EVENT_DISCONNECTED;
1785 break;
1786 case IB_CM_TIMEWAIT_EXIT:
1787 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1788 break;
1789 case IB_CM_MRA_RECEIVED:
1790 /* ignore event */
1791 goto out;
1792 case IB_CM_REJ_RECEIVED:
1793 pr_debug_ratelimited("RDMA CM: REJECTED: %s\n", rdma_reject_msg(&id_priv->id,
1794 ib_event->param.rej_rcvd.reason));
1795 cma_modify_qp_err(id_priv);
1796 event.status = ib_event->param.rej_rcvd.reason;
1797 event.event = RDMA_CM_EVENT_REJECTED;
1798 event.param.conn.private_data = ib_event->private_data;
1799 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
1800 break;
1801 default:
1802 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
1803 ib_event->event);
1804 goto out;
1805 }
1806
1807 ret = id_priv->id.event_handler(&id_priv->id, &event);
1808 if (ret) {
1809 /* Destroy the CM ID by returning a non-zero value. */
1810 id_priv->cm_id.ib = NULL;
1811 cma_exch(id_priv, RDMA_CM_DESTROYING);
1812 mutex_unlock(&id_priv->handler_mutex);
1813 rdma_destroy_id(&id_priv->id);
1814 return ret;
1815 }
1816 out:
1817 mutex_unlock(&id_priv->handler_mutex);
1818 return ret;
1819 }
1820
1821 static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
1822 struct ib_cm_event *ib_event,
1823 struct net_device *net_dev)
1824 {
1825 struct rdma_id_private *id_priv;
1826 struct rdma_cm_id *id;
1827 struct rdma_route *rt;
1828 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
1829 struct sa_path_rec *path = ib_event->param.req_rcvd.primary_path;
1830 const __be64 service_id = sa_path_get_service_id(path);
1831 int ret;
1832
1833 id = rdma_create_id(listen_id->route.addr.dev_addr.net,
1834 listen_id->event_handler, listen_id->context,
1835 listen_id->ps, ib_event->param.req_rcvd.qp_type);
1836 if (IS_ERR(id))
1837 return NULL;
1838
1839 id_priv = container_of(id, struct rdma_id_private, id);
1840 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
1841 (struct sockaddr *)&id->route.addr.dst_addr,
1842 listen_id, ib_event, ss_family, service_id))
1843 goto err;
1844
1845 rt = &id->route;
1846 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
1847 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1848 GFP_KERNEL);
1849 if (!rt->path_rec)
1850 goto err;
1851
1852 rt->path_rec[0] = *path;
1853 if (rt->num_paths == 2)
1854 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1855
1856 if (net_dev) {
1857 ret = rdma_copy_addr(&rt->addr.dev_addr, net_dev, NULL);
1858 if (ret)
1859 goto err;
1860 } else {
1861 if (!cma_protocol_roce(listen_id) &&
1862 cma_any_addr(cma_src_addr(id_priv))) {
1863 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
1864 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
1865 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
1866 } else if (!cma_any_addr(cma_src_addr(id_priv))) {
1867 ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr);
1868 if (ret)
1869 goto err;
1870 }
1871 }
1872 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
1873
1874 id_priv->state = RDMA_CM_CONNECT;
1875 return id_priv;
1876
1877 err:
1878 rdma_destroy_id(id);
1879 return NULL;
1880 }
1881
1882 static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1883 struct ib_cm_event *ib_event,
1884 struct net_device *net_dev)
1885 {
1886 struct rdma_id_private *id_priv;
1887 struct rdma_cm_id *id;
1888 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
1889 struct net *net = listen_id->route.addr.dev_addr.net;
1890 int ret;
1891
1892 id = rdma_create_id(net, listen_id->event_handler, listen_id->context,
1893 listen_id->ps, IB_QPT_UD);
1894 if (IS_ERR(id))
1895 return NULL;
1896
1897 id_priv = container_of(id, struct rdma_id_private, id);
1898 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
1899 (struct sockaddr *)&id->route.addr.dst_addr,
1900 listen_id, ib_event, ss_family,
1901 ib_event->param.sidr_req_rcvd.service_id))
1902 goto err;
1903
1904 if (net_dev) {
1905 ret = rdma_copy_addr(&id->route.addr.dev_addr, net_dev, NULL);
1906 if (ret)
1907 goto err;
1908 } else {
1909 if (!cma_any_addr(cma_src_addr(id_priv))) {
1910 ret = cma_translate_addr(cma_src_addr(id_priv),
1911 &id->route.addr.dev_addr);
1912 if (ret)
1913 goto err;
1914 }
1915 }
1916
1917 id_priv->state = RDMA_CM_CONNECT;
1918 return id_priv;
1919 err:
1920 rdma_destroy_id(id);
1921 return NULL;
1922 }
1923
1924 static void cma_set_req_event_data(struct rdma_cm_event *event,
1925 struct ib_cm_req_event_param *req_data,
1926 void *private_data, int offset)
1927 {
1928 event->param.conn.private_data = private_data + offset;
1929 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1930 event->param.conn.responder_resources = req_data->responder_resources;
1931 event->param.conn.initiator_depth = req_data->initiator_depth;
1932 event->param.conn.flow_control = req_data->flow_control;
1933 event->param.conn.retry_count = req_data->retry_count;
1934 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1935 event->param.conn.srq = req_data->srq;
1936 event->param.conn.qp_num = req_data->remote_qpn;
1937 }
1938
1939 static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event)
1940 {
1941 return (((ib_event->event == IB_CM_REQ_RECEIVED) &&
1942 (ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
1943 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
1944 (id->qp_type == IB_QPT_UD)) ||
1945 (!id->qp_type));
1946 }
1947
1948 static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1949 {
1950 struct rdma_id_private *listen_id, *conn_id = NULL;
1951 struct rdma_cm_event event;
1952 struct net_device *net_dev;
1953 int offset, ret;
1954
1955 listen_id = cma_id_from_event(cm_id, ib_event, &net_dev);
1956 if (IS_ERR(listen_id))
1957 return PTR_ERR(listen_id);
1958
1959 if (!cma_check_req_qp_type(&listen_id->id, ib_event)) {
1960 ret = -EINVAL;
1961 goto net_dev_put;
1962 }
1963
1964 mutex_lock(&listen_id->handler_mutex);
1965 if (listen_id->state != RDMA_CM_LISTEN) {
1966 ret = -ECONNABORTED;
1967 goto err1;
1968 }
1969
1970 memset(&event, 0, sizeof event);
1971 offset = cma_user_data_offset(listen_id);
1972 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1973 if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
1974 conn_id = cma_new_udp_id(&listen_id->id, ib_event, net_dev);
1975 event.param.ud.private_data = ib_event->private_data + offset;
1976 event.param.ud.private_data_len =
1977 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1978 } else {
1979 conn_id = cma_new_conn_id(&listen_id->id, ib_event, net_dev);
1980 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1981 ib_event->private_data, offset);
1982 }
1983 if (!conn_id) {
1984 ret = -ENOMEM;
1985 goto err1;
1986 }
1987
1988 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1989 ret = cma_acquire_dev(conn_id, listen_id);
1990 if (ret)
1991 goto err2;
1992
1993 conn_id->cm_id.ib = cm_id;
1994 cm_id->context = conn_id;
1995 cm_id->cm_handler = cma_ib_handler;
1996
1997 /*
1998 * Protect against the user destroying conn_id from another thread
1999 * until we're done accessing it.
2000 */
2001 atomic_inc(&conn_id->refcount);
2002 ret = conn_id->id.event_handler(&conn_id->id, &event);
2003 if (ret)
2004 goto err3;
2005 /*
2006 * Acquire mutex to prevent user executing rdma_destroy_id()
2007 * while we're accessing the cm_id.
2008 */
2009 mutex_lock(&lock);
2010 if (cma_comp(conn_id, RDMA_CM_CONNECT) &&
2011 (conn_id->id.qp_type != IB_QPT_UD))
2012 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
2013 mutex_unlock(&lock);
2014 mutex_unlock(&conn_id->handler_mutex);
2015 mutex_unlock(&listen_id->handler_mutex);
2016 cma_deref_id(conn_id);
2017 if (net_dev)
2018 dev_put(net_dev);
2019 return 0;
2020
2021 err3:
2022 cma_deref_id(conn_id);
2023 /* Destroy the CM ID by returning a non-zero value. */
2024 conn_id->cm_id.ib = NULL;
2025 err2:
2026 cma_exch(conn_id, RDMA_CM_DESTROYING);
2027 mutex_unlock(&conn_id->handler_mutex);
2028 err1:
2029 mutex_unlock(&listen_id->handler_mutex);
2030 if (conn_id)
2031 rdma_destroy_id(&conn_id->id);
2032
2033 net_dev_put:
2034 if (net_dev)
2035 dev_put(net_dev);
2036
2037 return ret;
2038 }
2039
2040 __be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr)
2041 {
2042 if (addr->sa_family == AF_IB)
2043 return ((struct sockaddr_ib *) addr)->sib_sid;
2044
2045 return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr)));
2046 }
2047 EXPORT_SYMBOL(rdma_get_service_id);
2048
2049 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
2050 {
2051 struct rdma_id_private *id_priv = iw_id->context;
2052 struct rdma_cm_event event;
2053 int ret = 0;
2054 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
2055 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
2056
2057 mutex_lock(&id_priv->handler_mutex);
2058 if (id_priv->state != RDMA_CM_CONNECT)
2059 goto out;
2060
2061 memset(&event, 0, sizeof event);
2062 switch (iw_event->event) {
2063 case IW_CM_EVENT_CLOSE:
2064 event.event = RDMA_CM_EVENT_DISCONNECTED;
2065 break;
2066 case IW_CM_EVENT_CONNECT_REPLY:
2067 memcpy(cma_src_addr(id_priv), laddr,
2068 rdma_addr_size(laddr));
2069 memcpy(cma_dst_addr(id_priv), raddr,
2070 rdma_addr_size(raddr));
2071 switch (iw_event->status) {
2072 case 0:
2073 event.event = RDMA_CM_EVENT_ESTABLISHED;
2074 event.param.conn.initiator_depth = iw_event->ird;
2075 event.param.conn.responder_resources = iw_event->ord;
2076 break;
2077 case -ECONNRESET:
2078 case -ECONNREFUSED:
2079 event.event = RDMA_CM_EVENT_REJECTED;
2080 break;
2081 case -ETIMEDOUT:
2082 event.event = RDMA_CM_EVENT_UNREACHABLE;
2083 break;
2084 default:
2085 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
2086 break;
2087 }
2088 break;
2089 case IW_CM_EVENT_ESTABLISHED:
2090 event.event = RDMA_CM_EVENT_ESTABLISHED;
2091 event.param.conn.initiator_depth = iw_event->ird;
2092 event.param.conn.responder_resources = iw_event->ord;
2093 break;
2094 default:
2095 BUG_ON(1);
2096 }
2097
2098 event.status = iw_event->status;
2099 event.param.conn.private_data = iw_event->private_data;
2100 event.param.conn.private_data_len = iw_event->private_data_len;
2101 ret = id_priv->id.event_handler(&id_priv->id, &event);
2102 if (ret) {
2103 /* Destroy the CM ID by returning a non-zero value. */
2104 id_priv->cm_id.iw = NULL;
2105 cma_exch(id_priv, RDMA_CM_DESTROYING);
2106 mutex_unlock(&id_priv->handler_mutex);
2107 rdma_destroy_id(&id_priv->id);
2108 return ret;
2109 }
2110
2111 out:
2112 mutex_unlock(&id_priv->handler_mutex);
2113 return ret;
2114 }
2115
2116 static int iw_conn_req_handler(struct iw_cm_id *cm_id,
2117 struct iw_cm_event *iw_event)
2118 {
2119 struct rdma_cm_id *new_cm_id;
2120 struct rdma_id_private *listen_id, *conn_id;
2121 struct rdma_cm_event event;
2122 int ret = -ECONNABORTED;
2123 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
2124 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
2125
2126 listen_id = cm_id->context;
2127
2128 mutex_lock(&listen_id->handler_mutex);
2129 if (listen_id->state != RDMA_CM_LISTEN)
2130 goto out;
2131
2132 /* Create a new RDMA id for the new IW CM ID */
2133 new_cm_id = rdma_create_id(listen_id->id.route.addr.dev_addr.net,
2134 listen_id->id.event_handler,
2135 listen_id->id.context,
2136 RDMA_PS_TCP, IB_QPT_RC);
2137 if (IS_ERR(new_cm_id)) {
2138 ret = -ENOMEM;
2139 goto out;
2140 }
2141 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
2142 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
2143 conn_id->state = RDMA_CM_CONNECT;
2144
2145 ret = rdma_translate_ip(laddr, &conn_id->id.route.addr.dev_addr, NULL);
2146 if (ret) {
2147 mutex_unlock(&conn_id->handler_mutex);
2148 rdma_destroy_id(new_cm_id);
2149 goto out;
2150 }
2151
2152 ret = cma_acquire_dev(conn_id, listen_id);
2153 if (ret) {
2154 mutex_unlock(&conn_id->handler_mutex);
2155 rdma_destroy_id(new_cm_id);
2156 goto out;
2157 }
2158
2159 conn_id->cm_id.iw = cm_id;
2160 cm_id->context = conn_id;
2161 cm_id->cm_handler = cma_iw_handler;
2162
2163 memcpy(cma_src_addr(conn_id), laddr, rdma_addr_size(laddr));
2164 memcpy(cma_dst_addr(conn_id), raddr, rdma_addr_size(raddr));
2165
2166 memset(&event, 0, sizeof event);
2167 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
2168 event.param.conn.private_data = iw_event->private_data;
2169 event.param.conn.private_data_len = iw_event->private_data_len;
2170 event.param.conn.initiator_depth = iw_event->ird;
2171 event.param.conn.responder_resources = iw_event->ord;
2172
2173 /*
2174 * Protect against the user destroying conn_id from another thread
2175 * until we're done accessing it.
2176 */
2177 atomic_inc(&conn_id->refcount);
2178 ret = conn_id->id.event_handler(&conn_id->id, &event);
2179 if (ret) {
2180 /* User wants to destroy the CM ID */
2181 conn_id->cm_id.iw = NULL;
2182 cma_exch(conn_id, RDMA_CM_DESTROYING);
2183 mutex_unlock(&conn_id->handler_mutex);
2184 cma_deref_id(conn_id);
2185 rdma_destroy_id(&conn_id->id);
2186 goto out;
2187 }
2188
2189 mutex_unlock(&conn_id->handler_mutex);
2190 cma_deref_id(conn_id);
2191
2192 out:
2193 mutex_unlock(&listen_id->handler_mutex);
2194 return ret;
2195 }
2196
2197 static int cma_ib_listen(struct rdma_id_private *id_priv)
2198 {
2199 struct sockaddr *addr;
2200 struct ib_cm_id *id;
2201 __be64 svc_id;
2202
2203 addr = cma_src_addr(id_priv);
2204 svc_id = rdma_get_service_id(&id_priv->id, addr);
2205 id = ib_cm_insert_listen(id_priv->id.device, cma_req_handler, svc_id);
2206 if (IS_ERR(id))
2207 return PTR_ERR(id);
2208 id_priv->cm_id.ib = id;
2209
2210 return 0;
2211 }
2212
2213 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
2214 {
2215 int ret;
2216 struct iw_cm_id *id;
2217
2218 id = iw_create_cm_id(id_priv->id.device,
2219 iw_conn_req_handler,
2220 id_priv);
2221 if (IS_ERR(id))
2222 return PTR_ERR(id);
2223
2224 id->tos = id_priv->tos;
2225 id_priv->cm_id.iw = id;
2226
2227 memcpy(&id_priv->cm_id.iw->local_addr, cma_src_addr(id_priv),
2228 rdma_addr_size(cma_src_addr(id_priv)));
2229
2230 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
2231
2232 if (ret) {
2233 iw_destroy_cm_id(id_priv->cm_id.iw);
2234 id_priv->cm_id.iw = NULL;
2235 }
2236
2237 return ret;
2238 }
2239
2240 static int cma_listen_handler(struct rdma_cm_id *id,
2241 struct rdma_cm_event *event)
2242 {
2243 struct rdma_id_private *id_priv = id->context;
2244
2245 id->context = id_priv->id.context;
2246 id->event_handler = id_priv->id.event_handler;
2247 return id_priv->id.event_handler(id, event);
2248 }
2249
2250 static void cma_listen_on_dev(struct rdma_id_private *id_priv,
2251 struct cma_device *cma_dev)
2252 {
2253 struct rdma_id_private *dev_id_priv;
2254 struct rdma_cm_id *id;
2255 struct net *net = id_priv->id.route.addr.dev_addr.net;
2256 int ret;
2257
2258 if (cma_family(id_priv) == AF_IB && !rdma_cap_ib_cm(cma_dev->device, 1))
2259 return;
2260
2261 id = rdma_create_id(net, cma_listen_handler, id_priv, id_priv->id.ps,
2262 id_priv->id.qp_type);
2263 if (IS_ERR(id))
2264 return;
2265
2266 dev_id_priv = container_of(id, struct rdma_id_private, id);
2267
2268 dev_id_priv->state = RDMA_CM_ADDR_BOUND;
2269 memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv),
2270 rdma_addr_size(cma_src_addr(id_priv)));
2271
2272 _cma_attach_to_dev(dev_id_priv, cma_dev);
2273 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
2274 atomic_inc(&id_priv->refcount);
2275 dev_id_priv->internal_id = 1;
2276 dev_id_priv->afonly = id_priv->afonly;
2277
2278 ret = rdma_listen(id, id_priv->backlog);
2279 if (ret)
2280 pr_warn("RDMA CMA: cma_listen_on_dev, error %d, listening on device %s\n",
2281 ret, cma_dev->device->name);
2282 }
2283
2284 static void cma_listen_on_all(struct rdma_id_private *id_priv)
2285 {
2286 struct cma_device *cma_dev;
2287
2288 mutex_lock(&lock);
2289 list_add_tail(&id_priv->list, &listen_any_list);
2290 list_for_each_entry(cma_dev, &dev_list, list)
2291 cma_listen_on_dev(id_priv, cma_dev);
2292 mutex_unlock(&lock);
2293 }
2294
2295 void rdma_set_service_type(struct rdma_cm_id *id, int tos)
2296 {
2297 struct rdma_id_private *id_priv;
2298
2299 id_priv = container_of(id, struct rdma_id_private, id);
2300 id_priv->tos = (u8) tos;
2301 id_priv->tos_set = true;
2302 }
2303 EXPORT_SYMBOL(rdma_set_service_type);
2304
2305 static void cma_query_handler(int status, struct sa_path_rec *path_rec,
2306 void *context)
2307 {
2308 struct cma_work *work = context;
2309 struct rdma_route *route;
2310
2311 route = &work->id->id.route;
2312
2313 if (!status) {
2314 route->num_paths = 1;
2315 *route->path_rec = *path_rec;
2316 } else {
2317 work->old_state = RDMA_CM_ROUTE_QUERY;
2318 work->new_state = RDMA_CM_ADDR_RESOLVED;
2319 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
2320 work->event.status = status;
2321 pr_debug_ratelimited("RDMA CM: ROUTE_ERROR: failed to query path. status %d\n",
2322 status);
2323 }
2324
2325 queue_work(cma_wq, &work->work);
2326 }
2327
2328 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
2329 struct cma_work *work)
2330 {
2331 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2332 struct sa_path_rec path_rec;
2333 ib_sa_comp_mask comp_mask;
2334 struct sockaddr_in6 *sin6;
2335 struct sockaddr_ib *sib;
2336
2337 memset(&path_rec, 0, sizeof path_rec);
2338
2339 if (rdma_cap_opa_ah(id_priv->id.device, id_priv->id.port_num))
2340 path_rec.rec_type = SA_PATH_REC_TYPE_OPA;
2341 else
2342 path_rec.rec_type = SA_PATH_REC_TYPE_IB;
2343 rdma_addr_get_sgid(dev_addr, &path_rec.sgid);
2344 rdma_addr_get_dgid(dev_addr, &path_rec.dgid);
2345 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
2346 path_rec.numb_path = 1;
2347 path_rec.reversible = 1;
2348 sa_path_set_service_id(&path_rec,
2349 rdma_get_service_id(&id_priv->id,
2350 cma_dst_addr(id_priv)));
2351
2352 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
2353 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
2354 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
2355
2356 switch (cma_family(id_priv)) {
2357 case AF_INET:
2358 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
2359 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
2360 break;
2361 case AF_INET6:
2362 sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
2363 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
2364 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2365 break;
2366 case AF_IB:
2367 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
2368 path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20);
2369 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2370 break;
2371 }
2372
2373 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
2374 id_priv->id.port_num, &path_rec,
2375 comp_mask, timeout_ms,
2376 GFP_KERNEL, cma_query_handler,
2377 work, &id_priv->query);
2378
2379 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
2380 }
2381
2382 static void cma_work_handler(struct work_struct *_work)
2383 {
2384 struct cma_work *work = container_of(_work, struct cma_work, work);
2385 struct rdma_id_private *id_priv = work->id;
2386 int destroy = 0;
2387
2388 mutex_lock(&id_priv->handler_mutex);
2389 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
2390 goto out;
2391
2392 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
2393 cma_exch(id_priv, RDMA_CM_DESTROYING);
2394 destroy = 1;
2395 }
2396 out:
2397 mutex_unlock(&id_priv->handler_mutex);
2398 cma_deref_id(id_priv);
2399 if (destroy)
2400 rdma_destroy_id(&id_priv->id);
2401 kfree(work);
2402 }
2403
2404 static void cma_ndev_work_handler(struct work_struct *_work)
2405 {
2406 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
2407 struct rdma_id_private *id_priv = work->id;
2408 int destroy = 0;
2409
2410 mutex_lock(&id_priv->handler_mutex);
2411 if (id_priv->state == RDMA_CM_DESTROYING ||
2412 id_priv->state == RDMA_CM_DEVICE_REMOVAL)
2413 goto out;
2414
2415 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
2416 cma_exch(id_priv, RDMA_CM_DESTROYING);
2417 destroy = 1;
2418 }
2419
2420 out:
2421 mutex_unlock(&id_priv->handler_mutex);
2422 cma_deref_id(id_priv);
2423 if (destroy)
2424 rdma_destroy_id(&id_priv->id);
2425 kfree(work);
2426 }
2427
2428 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
2429 {
2430 struct rdma_route *route = &id_priv->id.route;
2431 struct cma_work *work;
2432 int ret;
2433
2434 work = kzalloc(sizeof *work, GFP_KERNEL);
2435 if (!work)
2436 return -ENOMEM;
2437
2438 work->id = id_priv;
2439 INIT_WORK(&work->work, cma_work_handler);
2440 work->old_state = RDMA_CM_ROUTE_QUERY;
2441 work->new_state = RDMA_CM_ROUTE_RESOLVED;
2442 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2443
2444 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
2445 if (!route->path_rec) {
2446 ret = -ENOMEM;
2447 goto err1;
2448 }
2449
2450 ret = cma_query_ib_route(id_priv, timeout_ms, work);
2451 if (ret)
2452 goto err2;
2453
2454 return 0;
2455 err2:
2456 kfree(route->path_rec);
2457 route->path_rec = NULL;
2458 err1:
2459 kfree(work);
2460 return ret;
2461 }
2462
2463 int rdma_set_ib_paths(struct rdma_cm_id *id,
2464 struct sa_path_rec *path_rec, int num_paths)
2465 {
2466 struct rdma_id_private *id_priv;
2467 int ret;
2468
2469 id_priv = container_of(id, struct rdma_id_private, id);
2470 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2471 RDMA_CM_ROUTE_RESOLVED))
2472 return -EINVAL;
2473
2474 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths,
2475 GFP_KERNEL);
2476 if (!id->route.path_rec) {
2477 ret = -ENOMEM;
2478 goto err;
2479 }
2480
2481 id->route.num_paths = num_paths;
2482 return 0;
2483 err:
2484 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
2485 return ret;
2486 }
2487 EXPORT_SYMBOL(rdma_set_ib_paths);
2488
2489 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
2490 {
2491 struct cma_work *work;
2492
2493 work = kzalloc(sizeof *work, GFP_KERNEL);
2494 if (!work)
2495 return -ENOMEM;
2496
2497 work->id = id_priv;
2498 INIT_WORK(&work->work, cma_work_handler);
2499 work->old_state = RDMA_CM_ROUTE_QUERY;
2500 work->new_state = RDMA_CM_ROUTE_RESOLVED;
2501 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2502 queue_work(cma_wq, &work->work);
2503 return 0;
2504 }
2505
2506 static int iboe_tos_to_sl(struct net_device *ndev, int tos)
2507 {
2508 int prio;
2509 struct net_device *dev;
2510
2511 prio = rt_tos2priority(tos);
2512 dev = is_vlan_dev(ndev) ? vlan_dev_real_dev(ndev) : ndev;
2513 if (dev->num_tc)
2514 return netdev_get_prio_tc_map(dev, prio);
2515
2516 #if IS_ENABLED(CONFIG_VLAN_8021Q)
2517 if (is_vlan_dev(ndev))
2518 return (vlan_dev_get_egress_qos_mask(ndev, prio) &
2519 VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
2520 #endif
2521 return 0;
2522 }
2523
2524 static enum ib_gid_type cma_route_gid_type(enum rdma_network_type network_type,
2525 unsigned long supported_gids,
2526 enum ib_gid_type default_gid)
2527 {
2528 if ((network_type == RDMA_NETWORK_IPV4 ||
2529 network_type == RDMA_NETWORK_IPV6) &&
2530 test_bit(IB_GID_TYPE_ROCE_UDP_ENCAP, &supported_gids))
2531 return IB_GID_TYPE_ROCE_UDP_ENCAP;
2532
2533 return default_gid;
2534 }
2535
2536 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
2537 {
2538 struct rdma_route *route = &id_priv->id.route;
2539 struct rdma_addr *addr = &route->addr;
2540 struct cma_work *work;
2541 int ret;
2542 struct net_device *ndev = NULL;
2543 enum ib_gid_type gid_type = IB_GID_TYPE_IB;
2544 u8 default_roce_tos = id_priv->cma_dev->default_roce_tos[id_priv->id.port_num -
2545 rdma_start_port(id_priv->cma_dev->device)];
2546 u8 tos = id_priv->tos_set ? id_priv->tos : default_roce_tos;
2547
2548
2549 work = kzalloc(sizeof *work, GFP_KERNEL);
2550 if (!work)
2551 return -ENOMEM;
2552
2553 work->id = id_priv;
2554 INIT_WORK(&work->work, cma_work_handler);
2555
2556 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
2557 if (!route->path_rec) {
2558 ret = -ENOMEM;
2559 goto err1;
2560 }
2561
2562 route->num_paths = 1;
2563
2564 if (addr->dev_addr.bound_dev_if) {
2565 unsigned long supported_gids;
2566
2567 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if);
2568 if (!ndev) {
2569 ret = -ENODEV;
2570 goto err2;
2571 }
2572
2573 if (ndev->flags & IFF_LOOPBACK) {
2574 dev_put(ndev);
2575 if (!id_priv->id.device->get_netdev) {
2576 ret = -EOPNOTSUPP;
2577 goto err2;
2578 }
2579
2580 ndev = id_priv->id.device->get_netdev(id_priv->id.device,
2581 id_priv->id.port_num);
2582 if (!ndev) {
2583 ret = -ENODEV;
2584 goto err2;
2585 }
2586 }
2587
2588 supported_gids = roce_gid_type_mask_support(id_priv->id.device,
2589 id_priv->id.port_num);
2590 gid_type = cma_route_gid_type(addr->dev_addr.network,
2591 supported_gids,
2592 id_priv->gid_type);
2593 route->path_rec->rec_type =
2594 sa_conv_gid_to_pathrec_type(gid_type);
2595 sa_path_set_ndev(route->path_rec, &init_net);
2596 sa_path_set_ifindex(route->path_rec, ndev->ifindex);
2597 }
2598 if (!ndev) {
2599 ret = -ENODEV;
2600 goto err2;
2601 }
2602
2603 sa_path_set_dmac(route->path_rec, addr->dev_addr.dst_dev_addr);
2604
2605 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
2606 &route->path_rec->sgid);
2607 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.dst_addr,
2608 &route->path_rec->dgid);
2609
2610 /* Use the hint from IP Stack to select GID Type */
2611 if (gid_type < ib_network_to_gid_type(addr->dev_addr.network))
2612 gid_type = ib_network_to_gid_type(addr->dev_addr.network);
2613 route->path_rec->rec_type = sa_conv_gid_to_pathrec_type(gid_type);
2614
2615 if (((struct sockaddr *)&id_priv->id.route.addr.dst_addr)->sa_family != AF_IB)
2616 /* TODO: get the hoplimit from the inet/inet6 device */
2617 route->path_rec->hop_limit = addr->dev_addr.hoplimit;
2618 else
2619 route->path_rec->hop_limit = 1;
2620 route->path_rec->reversible = 1;
2621 route->path_rec->pkey = cpu_to_be16(0xffff);
2622 route->path_rec->mtu_selector = IB_SA_EQ;
2623 route->path_rec->sl = iboe_tos_to_sl(ndev, tos);
2624 route->path_rec->traffic_class = tos;
2625 route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
2626 route->path_rec->rate_selector = IB_SA_EQ;
2627 route->path_rec->rate = iboe_get_rate(ndev);
2628 dev_put(ndev);
2629 route->path_rec->packet_life_time_selector = IB_SA_EQ;
2630 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
2631 if (!route->path_rec->mtu) {
2632 ret = -EINVAL;
2633 goto err2;
2634 }
2635
2636 work->old_state = RDMA_CM_ROUTE_QUERY;
2637 work->new_state = RDMA_CM_ROUTE_RESOLVED;
2638 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2639 work->event.status = 0;
2640
2641 queue_work(cma_wq, &work->work);
2642
2643 return 0;
2644
2645 err2:
2646 kfree(route->path_rec);
2647 route->path_rec = NULL;
2648 err1:
2649 kfree(work);
2650 return ret;
2651 }
2652
2653 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
2654 {
2655 struct rdma_id_private *id_priv;
2656 int ret;
2657
2658 id_priv = container_of(id, struct rdma_id_private, id);
2659 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
2660 return -EINVAL;
2661
2662 atomic_inc(&id_priv->refcount);
2663 if (rdma_cap_ib_sa(id->device, id->port_num))
2664 ret = cma_resolve_ib_route(id_priv, timeout_ms);
2665 else if (rdma_protocol_roce(id->device, id->port_num))
2666 ret = cma_resolve_iboe_route(id_priv);
2667 else if (rdma_protocol_iwarp(id->device, id->port_num))
2668 ret = cma_resolve_iw_route(id_priv, timeout_ms);
2669 else
2670 ret = -ENOSYS;
2671
2672 if (ret)
2673 goto err;
2674
2675 return 0;
2676 err:
2677 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
2678 cma_deref_id(id_priv);
2679 return ret;
2680 }
2681 EXPORT_SYMBOL(rdma_resolve_route);
2682
2683 static void cma_set_loopback(struct sockaddr *addr)
2684 {
2685 switch (addr->sa_family) {
2686 case AF_INET:
2687 ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
2688 break;
2689 case AF_INET6:
2690 ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr,
2691 0, 0, 0, htonl(1));
2692 break;
2693 default:
2694 ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr,
2695 0, 0, 0, htonl(1));
2696 break;
2697 }
2698 }
2699
2700 static int cma_bind_loopback(struct rdma_id_private *id_priv)
2701 {
2702 struct cma_device *cma_dev, *cur_dev;
2703 union ib_gid gid;
2704 enum ib_port_state port_state;
2705 u16 pkey;
2706 int ret;
2707 u8 p;
2708
2709 cma_dev = NULL;
2710 mutex_lock(&lock);
2711 list_for_each_entry(cur_dev, &dev_list, list) {
2712 if (cma_family(id_priv) == AF_IB &&
2713 !rdma_cap_ib_cm(cur_dev->device, 1))
2714 continue;
2715
2716 if (!cma_dev)
2717 cma_dev = cur_dev;
2718
2719 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
2720 if (!ib_get_cached_port_state(cur_dev->device, p, &port_state) &&
2721 port_state == IB_PORT_ACTIVE) {
2722 cma_dev = cur_dev;
2723 goto port_found;
2724 }
2725 }
2726 }
2727
2728 if (!cma_dev) {
2729 ret = -ENODEV;
2730 goto out;
2731 }
2732
2733 p = 1;
2734
2735 port_found:
2736 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid, NULL);
2737 if (ret)
2738 goto out;
2739
2740 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
2741 if (ret)
2742 goto out;
2743
2744 id_priv->id.route.addr.dev_addr.dev_type =
2745 (rdma_protocol_ib(cma_dev->device, p)) ?
2746 ARPHRD_INFINIBAND : ARPHRD_ETHER;
2747
2748 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2749 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
2750 id_priv->id.port_num = p;
2751 cma_attach_to_dev(id_priv, cma_dev);
2752 cma_set_loopback(cma_src_addr(id_priv));
2753 out:
2754 mutex_unlock(&lock);
2755 return ret;
2756 }
2757
2758 static void addr_handler(int status, struct sockaddr *src_addr,
2759 struct rdma_dev_addr *dev_addr, void *context)
2760 {
2761 struct rdma_id_private *id_priv = context;
2762 struct rdma_cm_event event;
2763
2764 memset(&event, 0, sizeof event);
2765 mutex_lock(&id_priv->handler_mutex);
2766 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
2767 RDMA_CM_ADDR_RESOLVED))
2768 goto out;
2769
2770 memcpy(cma_src_addr(id_priv), src_addr, rdma_addr_size(src_addr));
2771 if (!status && !id_priv->cma_dev) {
2772 status = cma_acquire_dev(id_priv, NULL);
2773 if (status)
2774 pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to acquire device. status %d\n",
2775 status);
2776 } else {
2777 pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to resolve IP. status %d\n", status);
2778 }
2779
2780 if (status) {
2781 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2782 RDMA_CM_ADDR_BOUND))
2783 goto out;
2784 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2785 event.status = status;
2786 } else
2787 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2788
2789 if (id_priv->id.event_handler(&id_priv->id, &event)) {
2790 cma_exch(id_priv, RDMA_CM_DESTROYING);
2791 mutex_unlock(&id_priv->handler_mutex);
2792 cma_deref_id(id_priv);
2793 rdma_destroy_id(&id_priv->id);
2794 return;
2795 }
2796 out:
2797 mutex_unlock(&id_priv->handler_mutex);
2798 cma_deref_id(id_priv);
2799 }
2800
2801 static int cma_resolve_loopback(struct rdma_id_private *id_priv)
2802 {
2803 struct cma_work *work;
2804 union ib_gid gid;
2805 int ret;
2806
2807 work = kzalloc(sizeof *work, GFP_KERNEL);
2808 if (!work)
2809 return -ENOMEM;
2810
2811 if (!id_priv->cma_dev) {
2812 ret = cma_bind_loopback(id_priv);
2813 if (ret)
2814 goto err;
2815 }
2816
2817 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2818 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
2819
2820 work->id = id_priv;
2821 INIT_WORK(&work->work, cma_work_handler);
2822 work->old_state = RDMA_CM_ADDR_QUERY;
2823 work->new_state = RDMA_CM_ADDR_RESOLVED;
2824 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2825 queue_work(cma_wq, &work->work);
2826 return 0;
2827 err:
2828 kfree(work);
2829 return ret;
2830 }
2831
2832 static int cma_resolve_ib_addr(struct rdma_id_private *id_priv)
2833 {
2834 struct cma_work *work;
2835 int ret;
2836
2837 work = kzalloc(sizeof *work, GFP_KERNEL);
2838 if (!work)
2839 return -ENOMEM;
2840
2841 if (!id_priv->cma_dev) {
2842 ret = cma_resolve_ib_dev(id_priv);
2843 if (ret)
2844 goto err;
2845 }
2846
2847 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *)
2848 &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr));
2849
2850 work->id = id_priv;
2851 INIT_WORK(&work->work, cma_work_handler);
2852 work->old_state = RDMA_CM_ADDR_QUERY;
2853 work->new_state = RDMA_CM_ADDR_RESOLVED;
2854 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2855 queue_work(cma_wq, &work->work);
2856 return 0;
2857 err:
2858 kfree(work);
2859 return ret;
2860 }
2861
2862 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2863 struct sockaddr *dst_addr)
2864 {
2865 if (!src_addr || !src_addr->sa_family) {
2866 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
2867 src_addr->sa_family = dst_addr->sa_family;
2868 if (IS_ENABLED(CONFIG_IPV6) &&
2869 dst_addr->sa_family == AF_INET6) {
2870 struct sockaddr_in6 *src_addr6 = (struct sockaddr_in6 *) src_addr;
2871 struct sockaddr_in6 *dst_addr6 = (struct sockaddr_in6 *) dst_addr;
2872 src_addr6->sin6_scope_id = dst_addr6->sin6_scope_id;
2873 if (ipv6_addr_type(&dst_addr6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
2874 id->route.addr.dev_addr.bound_dev_if = dst_addr6->sin6_scope_id;
2875 } else if (dst_addr->sa_family == AF_IB) {
2876 ((struct sockaddr_ib *) src_addr)->sib_pkey =
2877 ((struct sockaddr_ib *) dst_addr)->sib_pkey;
2878 }
2879 }
2880 return rdma_bind_addr(id, src_addr);
2881 }
2882
2883 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2884 struct sockaddr *dst_addr, int timeout_ms)
2885 {
2886 struct rdma_id_private *id_priv;
2887 int ret;
2888
2889 id_priv = container_of(id, struct rdma_id_private, id);
2890 memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr));
2891 if (id_priv->state == RDMA_CM_IDLE) {
2892 ret = cma_bind_addr(id, src_addr, dst_addr);
2893 if (ret) {
2894 memset(cma_dst_addr(id_priv), 0, rdma_addr_size(dst_addr));
2895 return ret;
2896 }
2897 }
2898
2899 if (cma_family(id_priv) != dst_addr->sa_family) {
2900 memset(cma_dst_addr(id_priv), 0, rdma_addr_size(dst_addr));
2901 return -EINVAL;
2902 }
2903
2904 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY)) {
2905 memset(cma_dst_addr(id_priv), 0, rdma_addr_size(dst_addr));
2906 return -EINVAL;
2907 }
2908
2909 atomic_inc(&id_priv->refcount);
2910 if (cma_any_addr(dst_addr)) {
2911 ret = cma_resolve_loopback(id_priv);
2912 } else {
2913 if (dst_addr->sa_family == AF_IB) {
2914 ret = cma_resolve_ib_addr(id_priv);
2915 } else {
2916 ret = rdma_resolve_ip(&addr_client, cma_src_addr(id_priv),
2917 dst_addr, &id->route.addr.dev_addr,
2918 timeout_ms, addr_handler, id_priv);
2919 }
2920 }
2921 if (ret)
2922 goto err;
2923
2924 return 0;
2925 err:
2926 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
2927 cma_deref_id(id_priv);
2928 return ret;
2929 }
2930 EXPORT_SYMBOL(rdma_resolve_addr);
2931
2932 int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
2933 {
2934 struct rdma_id_private *id_priv;
2935 unsigned long flags;
2936 int ret;
2937
2938 id_priv = container_of(id, struct rdma_id_private, id);
2939 spin_lock_irqsave(&id_priv->lock, flags);
2940 if (reuse || id_priv->state == RDMA_CM_IDLE) {
2941 id_priv->reuseaddr = reuse;
2942 ret = 0;
2943 } else {
2944 ret = -EINVAL;
2945 }
2946 spin_unlock_irqrestore(&id_priv->lock, flags);
2947 return ret;
2948 }
2949 EXPORT_SYMBOL(rdma_set_reuseaddr);
2950
2951 int rdma_set_afonly(struct rdma_cm_id *id, int afonly)
2952 {
2953 struct rdma_id_private *id_priv;
2954 unsigned long flags;
2955 int ret;
2956
2957 id_priv = container_of(id, struct rdma_id_private, id);
2958 spin_lock_irqsave(&id_priv->lock, flags);
2959 if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) {
2960 id_priv->options |= (1 << CMA_OPTION_AFONLY);
2961 id_priv->afonly = afonly;
2962 ret = 0;
2963 } else {
2964 ret = -EINVAL;
2965 }
2966 spin_unlock_irqrestore(&id_priv->lock, flags);
2967 return ret;
2968 }
2969 EXPORT_SYMBOL(rdma_set_afonly);
2970
2971 static void cma_bind_port(struct rdma_bind_list *bind_list,
2972 struct rdma_id_private *id_priv)
2973 {
2974 struct sockaddr *addr;
2975 struct sockaddr_ib *sib;
2976 u64 sid, mask;
2977 __be16 port;
2978
2979 addr = cma_src_addr(id_priv);
2980 port = htons(bind_list->port);
2981
2982 switch (addr->sa_family) {
2983 case AF_INET:
2984 ((struct sockaddr_in *) addr)->sin_port = port;
2985 break;
2986 case AF_INET6:
2987 ((struct sockaddr_in6 *) addr)->sin6_port = port;
2988 break;
2989 case AF_IB:
2990 sib = (struct sockaddr_ib *) addr;
2991 sid = be64_to_cpu(sib->sib_sid);
2992 mask = be64_to_cpu(sib->sib_sid_mask);
2993 sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port));
2994 sib->sib_sid_mask = cpu_to_be64(~0ULL);
2995 break;
2996 }
2997 id_priv->bind_list = bind_list;
2998 hlist_add_head(&id_priv->node, &bind_list->owners);
2999 }
3000
3001 static int cma_alloc_port(enum rdma_port_space ps,
3002 struct rdma_id_private *id_priv, unsigned short snum)
3003 {
3004 struct rdma_bind_list *bind_list;
3005 int ret;
3006
3007 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
3008 if (!bind_list)
3009 return -ENOMEM;
3010
3011 ret = cma_ps_alloc(id_priv->id.route.addr.dev_addr.net, ps, bind_list,
3012 snum);
3013 if (ret < 0)
3014 goto err;
3015
3016 bind_list->ps = ps;
3017 bind_list->port = (unsigned short)ret;
3018 cma_bind_port(bind_list, id_priv);
3019 return 0;
3020 err:
3021 kfree(bind_list);
3022 return ret == -ENOSPC ? -EADDRNOTAVAIL : ret;
3023 }
3024
3025 static int cma_port_is_unique(struct rdma_bind_list *bind_list,
3026 struct rdma_id_private *id_priv)
3027 {
3028 struct rdma_id_private *cur_id;
3029 struct sockaddr *daddr = cma_dst_addr(id_priv);
3030 struct sockaddr *saddr = cma_src_addr(id_priv);
3031 __be16 dport = cma_port(daddr);
3032
3033 hlist_for_each_entry(cur_id, &bind_list->owners, node) {
3034 struct sockaddr *cur_daddr = cma_dst_addr(cur_id);
3035 struct sockaddr *cur_saddr = cma_src_addr(cur_id);
3036 __be16 cur_dport = cma_port(cur_daddr);
3037
3038 if (id_priv == cur_id)
3039 continue;
3040
3041 /* different dest port -> unique */
3042 if (!cma_any_port(cur_daddr) &&
3043 (dport != cur_dport))
3044 continue;
3045
3046 /* different src address -> unique */
3047 if (!cma_any_addr(saddr) &&
3048 !cma_any_addr(cur_saddr) &&
3049 cma_addr_cmp(saddr, cur_saddr))
3050 continue;
3051
3052 /* different dst address -> unique */
3053 if (!cma_any_addr(cur_daddr) &&
3054 cma_addr_cmp(daddr, cur_daddr))
3055 continue;
3056
3057 return -EADDRNOTAVAIL;
3058 }
3059 return 0;
3060 }
3061
3062 static int cma_alloc_any_port(enum rdma_port_space ps,
3063 struct rdma_id_private *id_priv)
3064 {
3065 static unsigned int last_used_port;
3066 int low, high, remaining;
3067 unsigned int rover;
3068 struct net *net = id_priv->id.route.addr.dev_addr.net;
3069
3070 inet_get_local_port_range(net, &low, &high);
3071 remaining = (high - low) + 1;
3072 rover = prandom_u32() % remaining + low;
3073 retry:
3074 if (last_used_port != rover) {
3075 struct rdma_bind_list *bind_list;
3076 int ret;
3077
3078 bind_list = cma_ps_find(net, ps, (unsigned short)rover);
3079
3080 if (!bind_list) {
3081 ret = cma_alloc_port(ps, id_priv, rover);
3082 } else {
3083 ret = cma_port_is_unique(bind_list, id_priv);
3084 if (!ret)
3085 cma_bind_port(bind_list, id_priv);
3086 }
3087 /*
3088 * Remember previously used port number in order to avoid
3089 * re-using same port immediately after it is closed.
3090 */
3091 if (!ret)
3092 last_used_port = rover;
3093 if (ret != -EADDRNOTAVAIL)
3094 return ret;
3095 }
3096 if (--remaining) {
3097 rover++;
3098 if ((rover < low) || (rover > high))
3099 rover = low;
3100 goto retry;
3101 }
3102 return -EADDRNOTAVAIL;
3103 }
3104
3105 /*
3106 * Check that the requested port is available. This is called when trying to
3107 * bind to a specific port, or when trying to listen on a bound port. In
3108 * the latter case, the provided id_priv may already be on the bind_list, but
3109 * we still need to check that it's okay to start listening.
3110 */
3111 static int cma_check_port(struct rdma_bind_list *bind_list,
3112 struct rdma_id_private *id_priv, uint8_t reuseaddr)
3113 {
3114 struct rdma_id_private *cur_id;
3115 struct sockaddr *addr, *cur_addr;
3116
3117 addr = cma_src_addr(id_priv);
3118 hlist_for_each_entry(cur_id, &bind_list->owners, node) {
3119 if (id_priv == cur_id)
3120 continue;
3121
3122 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr &&
3123 cur_id->reuseaddr)
3124 continue;
3125
3126 cur_addr = cma_src_addr(cur_id);
3127 if (id_priv->afonly && cur_id->afonly &&
3128 (addr->sa_family != cur_addr->sa_family))
3129 continue;
3130
3131 if (cma_any_addr(addr) || cma_any_addr(cur_addr))
3132 return -EADDRNOTAVAIL;
3133
3134 if (!cma_addr_cmp(addr, cur_addr))
3135 return -EADDRINUSE;
3136 }
3137 return 0;
3138 }
3139
3140 static int cma_use_port(enum rdma_port_space ps,
3141 struct rdma_id_private *id_priv)
3142 {
3143 struct rdma_bind_list *bind_list;
3144 unsigned short snum;
3145 int ret;
3146
3147 snum = ntohs(cma_port(cma_src_addr(id_priv)));
3148 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
3149 return -EACCES;
3150
3151 bind_list = cma_ps_find(id_priv->id.route.addr.dev_addr.net, ps, snum);
3152 if (!bind_list) {
3153 ret = cma_alloc_port(ps, id_priv, snum);
3154 } else {
3155 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
3156 if (!ret)
3157 cma_bind_port(bind_list, id_priv);
3158 }
3159 return ret;
3160 }
3161
3162 static int cma_bind_listen(struct rdma_id_private *id_priv)
3163 {
3164 struct rdma_bind_list *bind_list = id_priv->bind_list;
3165 int ret = 0;
3166
3167 mutex_lock(&lock);
3168 if (bind_list->owners.first->next)
3169 ret = cma_check_port(bind_list, id_priv, 0);
3170 mutex_unlock(&lock);
3171 return ret;
3172 }
3173
3174 static enum rdma_port_space cma_select_inet_ps(
3175 struct rdma_id_private *id_priv)
3176 {
3177 switch (id_priv->id.ps) {
3178 case RDMA_PS_TCP:
3179 case RDMA_PS_UDP:
3180 case RDMA_PS_IPOIB:
3181 case RDMA_PS_IB:
3182 return id_priv->id.ps;
3183 default:
3184
3185 return 0;
3186 }
3187 }
3188
3189 static enum rdma_port_space cma_select_ib_ps(struct rdma_id_private *id_priv)
3190 {
3191 enum rdma_port_space ps = 0;
3192 struct sockaddr_ib *sib;
3193 u64 sid_ps, mask, sid;
3194
3195 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
3196 mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK;
3197 sid = be64_to_cpu(sib->sib_sid) & mask;
3198
3199 if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) {
3200 sid_ps = RDMA_IB_IP_PS_IB;
3201 ps = RDMA_PS_IB;
3202 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) &&
3203 (sid == (RDMA_IB_IP_PS_TCP & mask))) {
3204 sid_ps = RDMA_IB_IP_PS_TCP;
3205 ps = RDMA_PS_TCP;
3206 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) &&
3207 (sid == (RDMA_IB_IP_PS_UDP & mask))) {
3208 sid_ps = RDMA_IB_IP_PS_UDP;
3209 ps = RDMA_PS_UDP;
3210 }
3211
3212 if (ps) {
3213 sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib)));
3214 sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK |
3215 be64_to_cpu(sib->sib_sid_mask));
3216 }
3217 return ps;
3218 }
3219
3220 static int cma_get_port(struct rdma_id_private *id_priv)
3221 {
3222 enum rdma_port_space ps;
3223 int ret;
3224
3225 if (cma_family(id_priv) != AF_IB)
3226 ps = cma_select_inet_ps(id_priv);
3227 else
3228 ps = cma_select_ib_ps(id_priv);
3229 if (!ps)
3230 return -EPROTONOSUPPORT;
3231
3232 mutex_lock(&lock);
3233 if (cma_any_port(cma_src_addr(id_priv)))
3234 ret = cma_alloc_any_port(ps, id_priv);
3235 else
3236 ret = cma_use_port(ps, id_priv);
3237 mutex_unlock(&lock);
3238
3239 return ret;
3240 }
3241
3242 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
3243 struct sockaddr *addr)
3244 {
3245 #if IS_ENABLED(CONFIG_IPV6)
3246 struct sockaddr_in6 *sin6;
3247
3248 if (addr->sa_family != AF_INET6)
3249 return 0;
3250
3251 sin6 = (struct sockaddr_in6 *) addr;
3252
3253 if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL))
3254 return 0;
3255
3256 if (!sin6->sin6_scope_id)
3257 return -EINVAL;
3258
3259 dev_addr->bound_dev_if = sin6->sin6_scope_id;
3260 #endif
3261 return 0;
3262 }
3263
3264 int rdma_listen(struct rdma_cm_id *id, int backlog)
3265 {
3266 struct rdma_id_private *id_priv;
3267 int ret;
3268
3269 id_priv = container_of(id, struct rdma_id_private, id);
3270 if (id_priv->state == RDMA_CM_IDLE) {
3271 id->route.addr.src_addr.ss_family = AF_INET;
3272 ret = rdma_bind_addr(id, cma_src_addr(id_priv));
3273 if (ret)
3274 return ret;
3275 }
3276
3277 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
3278 return -EINVAL;
3279
3280 if (id_priv->reuseaddr) {
3281 ret = cma_bind_listen(id_priv);
3282 if (ret)
3283 goto err;
3284 }
3285
3286 id_priv->backlog = backlog;
3287 if (id->device) {
3288 if (rdma_cap_ib_cm(id->device, 1)) {
3289 ret = cma_ib_listen(id_priv);
3290 if (ret)
3291 goto err;
3292 } else if (rdma_cap_iw_cm(id->device, 1)) {
3293 ret = cma_iw_listen(id_priv, backlog);
3294 if (ret)
3295 goto err;
3296 } else {
3297 ret = -ENOSYS;
3298 goto err;
3299 }
3300 } else
3301 cma_listen_on_all(id_priv);
3302
3303 return 0;
3304 err:
3305 id_priv->backlog = 0;
3306 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
3307 return ret;
3308 }
3309 EXPORT_SYMBOL(rdma_listen);
3310
3311 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
3312 {
3313 struct rdma_id_private *id_priv;
3314 int ret;
3315 struct sockaddr *daddr;
3316
3317 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 &&
3318 addr->sa_family != AF_IB)
3319 return -EAFNOSUPPORT;
3320
3321 id_priv = container_of(id, struct rdma_id_private, id);
3322 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
3323 return -EINVAL;
3324
3325 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
3326 if (ret)
3327 goto err1;
3328
3329 memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr));
3330 if (!cma_any_addr(addr)) {
3331 ret = cma_translate_addr(addr, &id->route.addr.dev_addr);
3332 if (ret)
3333 goto err1;
3334
3335 ret = cma_acquire_dev(id_priv, NULL);
3336 if (ret)
3337 goto err1;
3338 }
3339
3340 if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) {
3341 if (addr->sa_family == AF_INET)
3342 id_priv->afonly = 1;
3343 #if IS_ENABLED(CONFIG_IPV6)
3344 else if (addr->sa_family == AF_INET6) {
3345 struct net *net = id_priv->id.route.addr.dev_addr.net;
3346
3347 id_priv->afonly = net->ipv6.sysctl.bindv6only;
3348 }
3349 #endif
3350 }
3351 ret = cma_get_port(id_priv);
3352 if (ret)
3353 goto err2;
3354
3355 daddr = cma_dst_addr(id_priv);
3356 daddr->sa_family = addr->sa_family;
3357
3358 return 0;
3359 err2:
3360 if (id_priv->cma_dev)
3361 cma_release_dev(id_priv);
3362 err1:
3363 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
3364 return ret;
3365 }
3366 EXPORT_SYMBOL(rdma_bind_addr);
3367
3368 static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv)
3369 {
3370 struct cma_hdr *cma_hdr;
3371
3372 cma_hdr = hdr;
3373 cma_hdr->cma_version = CMA_VERSION;
3374 if (cma_family(id_priv) == AF_INET) {
3375 struct sockaddr_in *src4, *dst4;
3376
3377 src4 = (struct sockaddr_in *) cma_src_addr(id_priv);
3378 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv);
3379
3380 cma_set_ip_ver(cma_hdr, 4);
3381 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
3382 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
3383 cma_hdr->port = src4->sin_port;
3384 } else if (cma_family(id_priv) == AF_INET6) {
3385 struct sockaddr_in6 *src6, *dst6;
3386
3387 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
3388 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv);
3389
3390 cma_set_ip_ver(cma_hdr, 6);
3391 cma_hdr->src_addr.ip6 = src6->sin6_addr;
3392 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
3393 cma_hdr->port = src6->sin6_port;
3394 }
3395 return 0;
3396 }
3397
3398 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
3399 struct ib_cm_event *ib_event)
3400 {
3401 struct rdma_id_private *id_priv = cm_id->context;
3402 struct rdma_cm_event event;
3403 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
3404 int ret = 0;
3405
3406 mutex_lock(&id_priv->handler_mutex);
3407 if (id_priv->state != RDMA_CM_CONNECT)
3408 goto out;
3409
3410 memset(&event, 0, sizeof event);
3411 switch (ib_event->event) {
3412 case IB_CM_SIDR_REQ_ERROR:
3413 event.event = RDMA_CM_EVENT_UNREACHABLE;
3414 event.status = -ETIMEDOUT;
3415 break;
3416 case IB_CM_SIDR_REP_RECEIVED:
3417 event.param.ud.private_data = ib_event->private_data;
3418 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
3419 if (rep->status != IB_SIDR_SUCCESS) {
3420 event.event = RDMA_CM_EVENT_UNREACHABLE;
3421 event.status = ib_event->param.sidr_rep_rcvd.status;
3422 pr_debug_ratelimited("RDMA CM: UNREACHABLE: bad SIDR reply. status %d\n",
3423 event.status);
3424 break;
3425 }
3426 ret = cma_set_qkey(id_priv, rep->qkey);
3427 if (ret) {
3428 pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to set qkey. status %d\n", ret);
3429 event.event = RDMA_CM_EVENT_ADDR_ERROR;
3430 event.status = ret;
3431 break;
3432 }
3433 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
3434 id_priv->id.route.path_rec,
3435 &event.param.ud.ah_attr);
3436 event.param.ud.qp_num = rep->qpn;
3437 event.param.ud.qkey = rep->qkey;
3438 event.event = RDMA_CM_EVENT_ESTABLISHED;
3439 event.status = 0;
3440 break;
3441 default:
3442 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
3443 ib_event->event);
3444 goto out;
3445 }
3446
3447 ret = id_priv->id.event_handler(&id_priv->id, &event);
3448 if (ret) {
3449 /* Destroy the CM ID by returning a non-zero value. */
3450 id_priv->cm_id.ib = NULL;
3451 cma_exch(id_priv, RDMA_CM_DESTROYING);
3452 mutex_unlock(&id_priv->handler_mutex);
3453 rdma_destroy_id(&id_priv->id);
3454 return ret;
3455 }
3456 out:
3457 mutex_unlock(&id_priv->handler_mutex);
3458 return ret;
3459 }
3460
3461 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
3462 struct rdma_conn_param *conn_param)
3463 {
3464 struct ib_cm_sidr_req_param req;
3465 struct ib_cm_id *id;
3466 void *private_data;
3467 int offset, ret;
3468
3469 memset(&req, 0, sizeof req);
3470 offset = cma_user_data_offset(id_priv);
3471 req.private_data_len = offset + conn_param->private_data_len;
3472 if (req.private_data_len < conn_param->private_data_len)
3473 return -EINVAL;
3474
3475 if (req.private_data_len) {
3476 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3477 if (!private_data)
3478 return -ENOMEM;
3479 } else {
3480 private_data = NULL;
3481 }
3482
3483 if (conn_param->private_data && conn_param->private_data_len)
3484 memcpy(private_data + offset, conn_param->private_data,
3485 conn_param->private_data_len);
3486
3487 if (private_data) {
3488 ret = cma_format_hdr(private_data, id_priv);
3489 if (ret)
3490 goto out;
3491 req.private_data = private_data;
3492 }
3493
3494 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
3495 id_priv);
3496 if (IS_ERR(id)) {
3497 ret = PTR_ERR(id);
3498 goto out;
3499 }
3500 id_priv->cm_id.ib = id;
3501
3502 req.path = id_priv->id.route.path_rec;
3503 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
3504 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
3505 req.max_cm_retries = CMA_MAX_CM_RETRIES;
3506
3507 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
3508 if (ret) {
3509 ib_destroy_cm_id(id_priv->cm_id.ib);
3510 id_priv->cm_id.ib = NULL;
3511 }
3512 out:
3513 kfree(private_data);
3514 return ret;
3515 }
3516
3517 static int cma_connect_ib(struct rdma_id_private *id_priv,
3518 struct rdma_conn_param *conn_param)
3519 {
3520 struct ib_cm_req_param req;
3521 struct rdma_route *route;
3522 void *private_data;
3523 struct ib_cm_id *id;
3524 int offset, ret;
3525
3526 memset(&req, 0, sizeof req);
3527 offset = cma_user_data_offset(id_priv);
3528 req.private_data_len = offset + conn_param->private_data_len;
3529 if (req.private_data_len < conn_param->private_data_len)
3530 return -EINVAL;
3531
3532 if (req.private_data_len) {
3533 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3534 if (!private_data)
3535 return -ENOMEM;
3536 } else {
3537 private_data = NULL;
3538 }
3539
3540 if (conn_param->private_data && conn_param->private_data_len)
3541 memcpy(private_data + offset, conn_param->private_data,
3542 conn_param->private_data_len);
3543
3544 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
3545 if (IS_ERR(id)) {
3546 ret = PTR_ERR(id);
3547 goto out;
3548 }
3549 id_priv->cm_id.ib = id;
3550
3551 route = &id_priv->id.route;
3552 if (private_data) {
3553 ret = cma_format_hdr(private_data, id_priv);
3554 if (ret)
3555 goto out;
3556 req.private_data = private_data;
3557 }
3558
3559 req.primary_path = &route->path_rec[0];
3560 if (route->num_paths == 2)
3561 req.alternate_path = &route->path_rec[1];
3562
3563 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
3564 req.qp_num = id_priv->qp_num;
3565 req.qp_type = id_priv->id.qp_type;
3566 req.starting_psn = id_priv->seq_num;
3567 req.responder_resources = conn_param->responder_resources;
3568 req.initiator_depth = conn_param->initiator_depth;
3569 req.flow_control = conn_param->flow_control;
3570 req.retry_count = min_t(u8, 7, conn_param->retry_count);
3571 req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
3572 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3573 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3574 req.max_cm_retries = CMA_MAX_CM_RETRIES;
3575 req.srq = id_priv->srq ? 1 : 0;
3576
3577 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
3578 out:
3579 if (ret && !IS_ERR(id)) {
3580 ib_destroy_cm_id(id);
3581 id_priv->cm_id.ib = NULL;
3582 }
3583
3584 kfree(private_data);
3585 return ret;
3586 }
3587
3588 static int cma_connect_iw(struct rdma_id_private *id_priv,
3589 struct rdma_conn_param *conn_param)
3590 {
3591 struct iw_cm_id *cm_id;
3592 int ret;
3593 struct iw_cm_conn_param iw_param;
3594
3595 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
3596 if (IS_ERR(cm_id))
3597 return PTR_ERR(cm_id);
3598
3599 cm_id->tos = id_priv->tos;
3600 id_priv->cm_id.iw = cm_id;
3601
3602 memcpy(&cm_id->local_addr, cma_src_addr(id_priv),
3603 rdma_addr_size(cma_src_addr(id_priv)));
3604 memcpy(&cm_id->remote_addr, cma_dst_addr(id_priv),
3605 rdma_addr_size(cma_dst_addr(id_priv)));
3606
3607 ret = cma_modify_qp_rtr(id_priv, conn_param);
3608 if (ret)
3609 goto out;
3610
3611 if (conn_param) {
3612 iw_param.ord = conn_param->initiator_depth;
3613 iw_param.ird = conn_param->responder_resources;
3614 iw_param.private_data = conn_param->private_data;
3615 iw_param.private_data_len = conn_param->private_data_len;
3616 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
3617 } else {
3618 memset(&iw_param, 0, sizeof iw_param);
3619 iw_param.qpn = id_priv->qp_num;
3620 }
3621 ret = iw_cm_connect(cm_id, &iw_param);
3622 out:
3623 if (ret) {
3624 iw_destroy_cm_id(cm_id);
3625 id_priv->cm_id.iw = NULL;
3626 }
3627 return ret;
3628 }
3629
3630 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
3631 {
3632 struct rdma_id_private *id_priv;
3633 int ret;
3634
3635 id_priv = container_of(id, struct rdma_id_private, id);
3636 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
3637 return -EINVAL;
3638
3639 if (!id->qp) {
3640 id_priv->qp_num = conn_param->qp_num;
3641 id_priv->srq = conn_param->srq;
3642 }
3643
3644 if (rdma_cap_ib_cm(id->device, id->port_num)) {
3645 if (id->qp_type == IB_QPT_UD)
3646 ret = cma_resolve_ib_udp(id_priv, conn_param);
3647 else
3648 ret = cma_connect_ib(id_priv, conn_param);
3649 } else if (rdma_cap_iw_cm(id->device, id->port_num))
3650 ret = cma_connect_iw(id_priv, conn_param);
3651 else
3652 ret = -ENOSYS;
3653 if (ret)
3654 goto err;
3655
3656 return 0;
3657 err:
3658 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
3659 return ret;
3660 }
3661 EXPORT_SYMBOL(rdma_connect);
3662
3663 static int cma_accept_ib(struct rdma_id_private *id_priv,
3664 struct rdma_conn_param *conn_param)
3665 {
3666 struct ib_cm_rep_param rep;
3667 int ret;
3668
3669 ret = cma_modify_qp_rtr(id_priv, conn_param);
3670 if (ret)
3671 goto out;
3672
3673 ret = cma_modify_qp_rts(id_priv, conn_param);
3674 if (ret)
3675 goto out;
3676
3677 memset(&rep, 0, sizeof rep);
3678 rep.qp_num = id_priv->qp_num;
3679 rep.starting_psn = id_priv->seq_num;
3680 rep.private_data = conn_param->private_data;
3681 rep.private_data_len = conn_param->private_data_len;
3682 rep.responder_resources = conn_param->responder_resources;
3683 rep.initiator_depth = conn_param->initiator_depth;
3684 rep.failover_accepted = 0;
3685 rep.flow_control = conn_param->flow_control;
3686 rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
3687 rep.srq = id_priv->srq ? 1 : 0;
3688
3689 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
3690 out:
3691 return ret;
3692 }
3693
3694 static int cma_accept_iw(struct rdma_id_private *id_priv,
3695 struct rdma_conn_param *conn_param)
3696 {
3697 struct iw_cm_conn_param iw_param;
3698 int ret;
3699
3700 if (!conn_param)
3701 return -EINVAL;
3702
3703 ret = cma_modify_qp_rtr(id_priv, conn_param);
3704 if (ret)
3705 return ret;
3706
3707 iw_param.ord = conn_param->initiator_depth;
3708 iw_param.ird = conn_param->responder_resources;
3709 iw_param.private_data = conn_param->private_data;
3710 iw_param.private_data_len = conn_param->private_data_len;
3711 if (id_priv->id.qp) {
3712 iw_param.qpn = id_priv->qp_num;
3713 } else
3714 iw_param.qpn = conn_param->qp_num;
3715
3716 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
3717 }
3718
3719 static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
3720 enum ib_cm_sidr_status status, u32 qkey,
3721 const void *private_data, int private_data_len)
3722 {
3723 struct ib_cm_sidr_rep_param rep;
3724 int ret;
3725
3726 memset(&rep, 0, sizeof rep);
3727 rep.status = status;
3728 if (status == IB_SIDR_SUCCESS) {
3729 ret = cma_set_qkey(id_priv, qkey);
3730 if (ret)
3731 return ret;
3732 rep.qp_num = id_priv->qp_num;
3733 rep.qkey = id_priv->qkey;
3734 }
3735 rep.private_data = private_data;
3736 rep.private_data_len = private_data_len;
3737
3738 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
3739 }
3740
3741 int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
3742 {
3743 struct rdma_id_private *id_priv;
3744 int ret;
3745
3746 id_priv = container_of(id, struct rdma_id_private, id);
3747
3748 id_priv->owner = task_pid_nr(current);
3749
3750 if (!cma_comp(id_priv, RDMA_CM_CONNECT))
3751 return -EINVAL;
3752
3753 if (!id->qp && conn_param) {
3754 id_priv->qp_num = conn_param->qp_num;
3755 id_priv->srq = conn_param->srq;
3756 }
3757
3758 if (rdma_cap_ib_cm(id->device, id->port_num)) {
3759 if (id->qp_type == IB_QPT_UD) {
3760 if (conn_param)
3761 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
3762 conn_param->qkey,
3763 conn_param->private_data,
3764 conn_param->private_data_len);
3765 else
3766 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
3767 0, NULL, 0);
3768 } else {
3769 if (conn_param)
3770 ret = cma_accept_ib(id_priv, conn_param);
3771 else
3772 ret = cma_rep_recv(id_priv);
3773 }
3774 } else if (rdma_cap_iw_cm(id->device, id->port_num))
3775 ret = cma_accept_iw(id_priv, conn_param);
3776 else
3777 ret = -ENOSYS;
3778
3779 if (ret)
3780 goto reject;
3781
3782 return 0;
3783 reject:
3784 cma_modify_qp_err(id_priv);
3785 rdma_reject(id, NULL, 0);
3786 return ret;
3787 }
3788 EXPORT_SYMBOL(rdma_accept);
3789
3790 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
3791 {
3792 struct rdma_id_private *id_priv;
3793 int ret;
3794
3795 id_priv = container_of(id, struct rdma_id_private, id);
3796 if (!id_priv->cm_id.ib)
3797 return -EINVAL;
3798
3799 switch (id->device->node_type) {
3800 case RDMA_NODE_IB_CA:
3801 ret = ib_cm_notify(id_priv->cm_id.ib, event);
3802 break;
3803 default:
3804 ret = 0;
3805 break;
3806 }
3807 return ret;
3808 }
3809 EXPORT_SYMBOL(rdma_notify);
3810
3811 int rdma_reject(struct rdma_cm_id *id, const void *private_data,
3812 u8 private_data_len)
3813 {
3814 struct rdma_id_private *id_priv;
3815 int ret;
3816
3817 id_priv = container_of(id, struct rdma_id_private, id);
3818 if (!id_priv->cm_id.ib)
3819 return -EINVAL;
3820
3821 if (rdma_cap_ib_cm(id->device, id->port_num)) {
3822 if (id->qp_type == IB_QPT_UD)
3823 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0,
3824 private_data, private_data_len);
3825 else
3826 ret = ib_send_cm_rej(id_priv->cm_id.ib,
3827 IB_CM_REJ_CONSUMER_DEFINED, NULL,
3828 0, private_data, private_data_len);
3829 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
3830 ret = iw_cm_reject(id_priv->cm_id.iw,
3831 private_data, private_data_len);
3832 } else
3833 ret = -ENOSYS;
3834
3835 return ret;
3836 }
3837 EXPORT_SYMBOL(rdma_reject);
3838
3839 int rdma_disconnect(struct rdma_cm_id *id)
3840 {
3841 struct rdma_id_private *id_priv;
3842 int ret;
3843
3844 id_priv = container_of(id, struct rdma_id_private, id);
3845 if (!id_priv->cm_id.ib)
3846 return -EINVAL;
3847
3848 if (rdma_cap_ib_cm(id->device, id->port_num)) {
3849 ret = cma_modify_qp_err(id_priv);
3850 if (ret)
3851 goto out;
3852 /* Initiate or respond to a disconnect. */
3853 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
3854 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
3855 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
3856 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
3857 } else
3858 ret = -EINVAL;
3859
3860 out:
3861 return ret;
3862 }
3863 EXPORT_SYMBOL(rdma_disconnect);
3864
3865 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
3866 {
3867 struct rdma_id_private *id_priv;
3868 struct cma_multicast *mc = multicast->context;
3869 struct rdma_cm_event event;
3870 int ret = 0;
3871
3872 id_priv = mc->id_priv;
3873 mutex_lock(&id_priv->handler_mutex);
3874 if (id_priv->state != RDMA_CM_ADDR_BOUND &&
3875 id_priv->state != RDMA_CM_ADDR_RESOLVED)
3876 goto out;
3877
3878 if (!status)
3879 status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey));
3880 else
3881 pr_debug_ratelimited("RDMA CM: MULTICAST_ERROR: failed to join multicast. status %d\n",
3882 status);
3883 mutex_lock(&id_priv->qp_mutex);
3884 if (!status && id_priv->id.qp) {
3885 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
3886 be16_to_cpu(multicast->rec.mlid));
3887 if (status)
3888 pr_debug_ratelimited("RDMA CM: MULTICAST_ERROR: failed to attach QP. status %d\n",
3889 status);
3890 }
3891 mutex_unlock(&id_priv->qp_mutex);
3892
3893 memset(&event, 0, sizeof event);
3894 event.status = status;
3895 event.param.ud.private_data = mc->context;
3896 if (!status) {
3897 struct rdma_dev_addr *dev_addr =
3898 &id_priv->id.route.addr.dev_addr;
3899 struct net_device *ndev =
3900 dev_get_by_index(&init_net, dev_addr->bound_dev_if);
3901 enum ib_gid_type gid_type =
3902 id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
3903 rdma_start_port(id_priv->cma_dev->device)];
3904
3905 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
3906 ib_init_ah_from_mcmember(id_priv->id.device,
3907 id_priv->id.port_num, &multicast->rec,
3908 ndev, gid_type,
3909 &event.param.ud.ah_attr);
3910 event.param.ud.qp_num = 0xFFFFFF;
3911 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
3912 if (ndev)
3913 dev_put(ndev);
3914 } else
3915 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
3916
3917 ret = id_priv->id.event_handler(&id_priv->id, &event);
3918 if (ret) {
3919 cma_exch(id_priv, RDMA_CM_DESTROYING);
3920 mutex_unlock(&id_priv->handler_mutex);
3921 rdma_destroy_id(&id_priv->id);
3922 return 0;
3923 }
3924
3925 out:
3926 mutex_unlock(&id_priv->handler_mutex);
3927 return 0;
3928 }
3929
3930 static void cma_set_mgid(struct rdma_id_private *id_priv,
3931 struct sockaddr *addr, union ib_gid *mgid)
3932 {
3933 unsigned char mc_map[MAX_ADDR_LEN];
3934 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3935 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
3936 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
3937
3938 if (cma_any_addr(addr)) {
3939 memset(mgid, 0, sizeof *mgid);
3940 } else if ((addr->sa_family == AF_INET6) &&
3941 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
3942 0xFF10A01B)) {
3943 /* IPv6 address is an SA assigned MGID. */
3944 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3945 } else if (addr->sa_family == AF_IB) {
3946 memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid);
3947 } else if ((addr->sa_family == AF_INET6)) {
3948 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
3949 if (id_priv->id.ps == RDMA_PS_UDP)
3950 mc_map[7] = 0x01; /* Use RDMA CM signature */
3951 *mgid = *(union ib_gid *) (mc_map + 4);
3952 } else {
3953 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
3954 if (id_priv->id.ps == RDMA_PS_UDP)
3955 mc_map[7] = 0x01; /* Use RDMA CM signature */
3956 *mgid = *(union ib_gid *) (mc_map + 4);
3957 }
3958 }
3959
3960 static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
3961 struct cma_multicast *mc)
3962 {
3963 struct ib_sa_mcmember_rec rec;
3964 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3965 ib_sa_comp_mask comp_mask;
3966 int ret;
3967
3968 ib_addr_get_mgid(dev_addr, &rec.mgid);
3969 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
3970 &rec.mgid, &rec);
3971 if (ret)
3972 return ret;
3973
3974 ret = cma_set_qkey(id_priv, 0);
3975 if (ret)
3976 return ret;
3977
3978 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
3979 rec.qkey = cpu_to_be32(id_priv->qkey);
3980 rdma_addr_get_sgid(dev_addr, &rec.port_gid);
3981 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
3982 rec.join_state = mc->join_state;
3983
3984 if ((rec.join_state == BIT(SENDONLY_FULLMEMBER_JOIN)) &&
3985 (!ib_sa_sendonly_fullmem_support(&sa_client,
3986 id_priv->id.device,
3987 id_priv->id.port_num))) {
3988 pr_warn("RDMA CM: %s port %u Unable to multicast join\n"
3989 "RDMA CM: SM doesn't support Send Only Full Member option\n",
3990 id_priv->id.device->name, id_priv->id.port_num);
3991 return -EOPNOTSUPP;
3992 }
3993
3994 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
3995 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
3996 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
3997 IB_SA_MCMEMBER_REC_FLOW_LABEL |
3998 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
3999
4000 if (id_priv->id.ps == RDMA_PS_IPOIB)
4001 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
4002 IB_SA_MCMEMBER_REC_RATE_SELECTOR |
4003 IB_SA_MCMEMBER_REC_MTU_SELECTOR |
4004 IB_SA_MCMEMBER_REC_MTU |
4005 IB_SA_MCMEMBER_REC_HOP_LIMIT;
4006
4007 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
4008 id_priv->id.port_num, &rec,
4009 comp_mask, GFP_KERNEL,
4010 cma_ib_mc_handler, mc);
4011 return PTR_ERR_OR_ZERO(mc->multicast.ib);
4012 }
4013
4014 static void iboe_mcast_work_handler(struct work_struct *work)
4015 {
4016 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
4017 struct cma_multicast *mc = mw->mc;
4018 struct ib_sa_multicast *m = mc->multicast.ib;
4019
4020 mc->multicast.ib->context = mc;
4021 cma_ib_mc_handler(0, m);
4022 kref_put(&mc->mcref, release_mc);
4023 kfree(mw);
4024 }
4025
4026 static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid)
4027 {
4028 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
4029 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
4030
4031 if (cma_any_addr(addr)) {
4032 memset(mgid, 0, sizeof *mgid);
4033 } else if (addr->sa_family == AF_INET6) {
4034 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
4035 } else {
4036 mgid->raw[0] = 0xff;
4037 mgid->raw[1] = 0x0e;
4038 mgid->raw[2] = 0;
4039 mgid->raw[3] = 0;
4040 mgid->raw[4] = 0;
4041 mgid->raw[5] = 0;
4042 mgid->raw[6] = 0;
4043 mgid->raw[7] = 0;
4044 mgid->raw[8] = 0;
4045 mgid->raw[9] = 0;
4046 mgid->raw[10] = 0xff;
4047 mgid->raw[11] = 0xff;
4048 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
4049 }
4050 }
4051
4052 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
4053 struct cma_multicast *mc)
4054 {
4055 struct iboe_mcast_work *work;
4056 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
4057 int err = 0;
4058 struct sockaddr *addr = (struct sockaddr *)&mc->addr;
4059 struct net_device *ndev = NULL;
4060 enum ib_gid_type gid_type;
4061 bool send_only;
4062
4063 send_only = mc->join_state == BIT(SENDONLY_FULLMEMBER_JOIN);
4064
4065 if (cma_zero_addr((struct sockaddr *)&mc->addr))
4066 return -EINVAL;
4067
4068 work = kzalloc(sizeof *work, GFP_KERNEL);
4069 if (!work)
4070 return -ENOMEM;
4071
4072 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
4073 if (!mc->multicast.ib) {
4074 err = -ENOMEM;
4075 goto out1;
4076 }
4077
4078 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid);
4079
4080 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
4081 if (id_priv->id.ps == RDMA_PS_UDP)
4082 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
4083
4084 if (dev_addr->bound_dev_if)
4085 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
4086 if (!ndev) {
4087 err = -ENODEV;
4088 goto out2;
4089 }
4090 mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
4091 mc->multicast.ib->rec.hop_limit = 1;
4092 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
4093
4094 gid_type = id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
4095 rdma_start_port(id_priv->cma_dev->device)];
4096 if (addr->sa_family == AF_INET) {
4097 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) {
4098 mc->multicast.ib->rec.hop_limit = IPV6_DEFAULT_HOPLIMIT;
4099 if (!send_only) {
4100 err = cma_igmp_send(ndev, &mc->multicast.ib->rec.mgid,
4101 true);
4102 if (!err)
4103 mc->igmp_joined = true;
4104 }
4105 }
4106 } else {
4107 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP)
4108 err = -ENOTSUPP;
4109 }
4110 dev_put(ndev);
4111 if (err || !mc->multicast.ib->rec.mtu) {
4112 if (!err)
4113 err = -EINVAL;
4114 goto out2;
4115 }
4116 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
4117 &mc->multicast.ib->rec.port_gid);
4118 work->id = id_priv;
4119 work->mc = mc;
4120 INIT_WORK(&work->work, iboe_mcast_work_handler);
4121 kref_get(&mc->mcref);
4122 queue_work(cma_wq, &work->work);
4123
4124 return 0;
4125
4126 out2:
4127 kfree(mc->multicast.ib);
4128 out1:
4129 kfree(work);
4130 return err;
4131 }
4132
4133 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
4134 u8 join_state, void *context)
4135 {
4136 struct rdma_id_private *id_priv;
4137 struct cma_multicast *mc;
4138 int ret;
4139
4140 id_priv = container_of(id, struct rdma_id_private, id);
4141 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
4142 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
4143 return -EINVAL;
4144
4145 mc = kmalloc(sizeof *mc, GFP_KERNEL);
4146 if (!mc)
4147 return -ENOMEM;
4148
4149 memcpy(&mc->addr, addr, rdma_addr_size(addr));
4150 mc->context = context;
4151 mc->id_priv = id_priv;
4152 mc->igmp_joined = false;
4153 mc->join_state = join_state;
4154 spin_lock(&id_priv->lock);
4155 list_add(&mc->list, &id_priv->mc_list);
4156 spin_unlock(&id_priv->lock);
4157
4158 if (rdma_protocol_roce(id->device, id->port_num)) {
4159 kref_init(&mc->mcref);
4160 ret = cma_iboe_join_multicast(id_priv, mc);
4161 } else if (rdma_cap_ib_mcast(id->device, id->port_num))
4162 ret = cma_join_ib_multicast(id_priv, mc);
4163 else
4164 ret = -ENOSYS;
4165
4166 if (ret) {
4167 spin_lock_irq(&id_priv->lock);
4168 list_del(&mc->list);
4169 spin_unlock_irq(&id_priv->lock);
4170 kfree(mc);
4171 }
4172 return ret;
4173 }
4174 EXPORT_SYMBOL(rdma_join_multicast);
4175
4176 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
4177 {
4178 struct rdma_id_private *id_priv;
4179 struct cma_multicast *mc;
4180
4181 id_priv = container_of(id, struct rdma_id_private, id);
4182 spin_lock_irq(&id_priv->lock);
4183 list_for_each_entry(mc, &id_priv->mc_list, list) {
4184 if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) {
4185 list_del(&mc->list);
4186 spin_unlock_irq(&id_priv->lock);
4187
4188 if (id->qp)
4189 ib_detach_mcast(id->qp,
4190 &mc->multicast.ib->rec.mgid,
4191 be16_to_cpu(mc->multicast.ib->rec.mlid));
4192
4193 BUG_ON(id_priv->cma_dev->device != id->device);
4194
4195 if (rdma_cap_ib_mcast(id->device, id->port_num)) {
4196 ib_sa_free_multicast(mc->multicast.ib);
4197 kfree(mc);
4198 } else if (rdma_protocol_roce(id->device, id->port_num)) {
4199 if (mc->igmp_joined) {
4200 struct rdma_dev_addr *dev_addr =
4201 &id->route.addr.dev_addr;
4202 struct net_device *ndev = NULL;
4203
4204 if (dev_addr->bound_dev_if)
4205 ndev = dev_get_by_index(&init_net,
4206 dev_addr->bound_dev_if);
4207 if (ndev) {
4208 cma_igmp_send(ndev,
4209 &mc->multicast.ib->rec.mgid,
4210 false);
4211 dev_put(ndev);
4212 }
4213 mc->igmp_joined = false;
4214 }
4215 kref_put(&mc->mcref, release_mc);
4216 }
4217 return;
4218 }
4219 }
4220 spin_unlock_irq(&id_priv->lock);
4221 }
4222 EXPORT_SYMBOL(rdma_leave_multicast);
4223
4224 static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
4225 {
4226 struct rdma_dev_addr *dev_addr;
4227 struct cma_ndev_work *work;
4228
4229 dev_addr = &id_priv->id.route.addr.dev_addr;
4230
4231 if ((dev_addr->bound_dev_if == ndev->ifindex) &&
4232 (net_eq(dev_net(ndev), dev_addr->net)) &&
4233 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
4234 pr_info("RDMA CM addr change for ndev %s used by id %p\n",
4235 ndev->name, &id_priv->id);
4236 work = kzalloc(sizeof *work, GFP_KERNEL);
4237 if (!work)
4238 return -ENOMEM;
4239
4240 INIT_WORK(&work->work, cma_ndev_work_handler);
4241 work->id = id_priv;
4242 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
4243 atomic_inc(&id_priv->refcount);
4244 queue_work(cma_wq, &work->work);
4245 }
4246
4247 return 0;
4248 }
4249
4250 static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
4251 void *ptr)
4252 {
4253 struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
4254 struct cma_device *cma_dev;
4255 struct rdma_id_private *id_priv;
4256 int ret = NOTIFY_DONE;
4257
4258 if (event != NETDEV_BONDING_FAILOVER)
4259 return NOTIFY_DONE;
4260
4261 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
4262 return NOTIFY_DONE;
4263
4264 mutex_lock(&lock);
4265 list_for_each_entry(cma_dev, &dev_list, list)
4266 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
4267 ret = cma_netdev_change(ndev, id_priv);
4268 if (ret)
4269 goto out;
4270 }
4271
4272 out:
4273 mutex_unlock(&lock);
4274 return ret;
4275 }
4276
4277 static struct notifier_block cma_nb = {
4278 .notifier_call = cma_netdev_callback
4279 };
4280
4281 static void cma_add_one(struct ib_device *device)
4282 {
4283 struct cma_device *cma_dev;
4284 struct rdma_id_private *id_priv;
4285 unsigned int i;
4286 unsigned long supported_gids = 0;
4287
4288 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
4289 if (!cma_dev)
4290 return;
4291
4292 cma_dev->device = device;
4293 cma_dev->default_gid_type = kcalloc(device->phys_port_cnt,
4294 sizeof(*cma_dev->default_gid_type),
4295 GFP_KERNEL);
4296 if (!cma_dev->default_gid_type)
4297 goto free_cma_dev;
4298
4299 cma_dev->default_roce_tos = kcalloc(device->phys_port_cnt,
4300 sizeof(*cma_dev->default_roce_tos),
4301 GFP_KERNEL);
4302 if (!cma_dev->default_roce_tos)
4303 goto free_gid_type;
4304
4305 for (i = rdma_start_port(device); i <= rdma_end_port(device); i++) {
4306 supported_gids = roce_gid_type_mask_support(device, i);
4307 WARN_ON(!supported_gids);
4308 cma_dev->default_gid_type[i - rdma_start_port(device)] =
4309 find_first_bit(&supported_gids, BITS_PER_LONG);
4310 cma_dev->default_roce_tos[i - rdma_start_port(device)] = 0;
4311 }
4312
4313 init_completion(&cma_dev->comp);
4314 atomic_set(&cma_dev->refcount, 1);
4315 INIT_LIST_HEAD(&cma_dev->id_list);
4316 ib_set_client_data(device, &cma_client, cma_dev);
4317
4318 mutex_lock(&lock);
4319 list_add_tail(&cma_dev->list, &dev_list);
4320 list_for_each_entry(id_priv, &listen_any_list, list)
4321 cma_listen_on_dev(id_priv, cma_dev);
4322 mutex_unlock(&lock);
4323
4324 return;
4325
4326 free_gid_type:
4327 kfree(cma_dev->default_gid_type);
4328
4329 free_cma_dev:
4330 kfree(cma_dev);
4331
4332 return;
4333 }
4334
4335 static int cma_remove_id_dev(struct rdma_id_private *id_priv)
4336 {
4337 struct rdma_cm_event event;
4338 enum rdma_cm_state state;
4339 int ret = 0;
4340
4341 /* Record that we want to remove the device */
4342 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
4343 if (state == RDMA_CM_DESTROYING)
4344 return 0;
4345
4346 cma_cancel_operation(id_priv, state);
4347 mutex_lock(&id_priv->handler_mutex);
4348
4349 /* Check for destruction from another callback. */
4350 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
4351 goto out;
4352
4353 memset(&event, 0, sizeof event);
4354 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
4355 ret = id_priv->id.event_handler(&id_priv->id, &event);
4356 out:
4357 mutex_unlock(&id_priv->handler_mutex);
4358 return ret;
4359 }
4360
4361 static void cma_process_remove(struct cma_device *cma_dev)
4362 {
4363 struct rdma_id_private *id_priv;
4364 int ret;
4365
4366 mutex_lock(&lock);
4367 while (!list_empty(&cma_dev->id_list)) {
4368 id_priv = list_entry(cma_dev->id_list.next,
4369 struct rdma_id_private, list);
4370
4371 list_del(&id_priv->listen_list);
4372 list_del_init(&id_priv->list);
4373 atomic_inc(&id_priv->refcount);
4374 mutex_unlock(&lock);
4375
4376 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
4377 cma_deref_id(id_priv);
4378 if (ret)
4379 rdma_destroy_id(&id_priv->id);
4380
4381 mutex_lock(&lock);
4382 }
4383 mutex_unlock(&lock);
4384
4385 cma_deref_dev(cma_dev);
4386 wait_for_completion(&cma_dev->comp);
4387 }
4388
4389 static void cma_remove_one(struct ib_device *device, void *client_data)
4390 {
4391 struct cma_device *cma_dev = client_data;
4392
4393 if (!cma_dev)
4394 return;
4395
4396 mutex_lock(&lock);
4397 list_del(&cma_dev->list);
4398 mutex_unlock(&lock);
4399
4400 cma_process_remove(cma_dev);
4401 kfree(cma_dev->default_roce_tos);
4402 kfree(cma_dev->default_gid_type);
4403 kfree(cma_dev);
4404 }
4405
4406 static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb)
4407 {
4408 struct nlmsghdr *nlh;
4409 struct rdma_cm_id_stats *id_stats;
4410 struct rdma_id_private *id_priv;
4411 struct rdma_cm_id *id = NULL;
4412 struct cma_device *cma_dev;
4413 int i_dev = 0, i_id = 0;
4414
4415 /*
4416 * We export all of the IDs as a sequence of messages. Each
4417 * ID gets its own netlink message.
4418 */
4419 mutex_lock(&lock);
4420
4421 list_for_each_entry(cma_dev, &dev_list, list) {
4422 if (i_dev < cb->args[0]) {
4423 i_dev++;
4424 continue;
4425 }
4426
4427 i_id = 0;
4428 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
4429 if (i_id < cb->args[1]) {
4430 i_id++;
4431 continue;
4432 }
4433
4434 id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq,
4435 sizeof *id_stats, RDMA_NL_RDMA_CM,
4436 RDMA_NL_RDMA_CM_ID_STATS,
4437 NLM_F_MULTI);
4438 if (!id_stats)
4439 goto out;
4440
4441 memset(id_stats, 0, sizeof *id_stats);
4442 id = &id_priv->id;
4443 id_stats->node_type = id->route.addr.dev_addr.dev_type;
4444 id_stats->port_num = id->port_num;
4445 id_stats->bound_dev_if =
4446 id->route.addr.dev_addr.bound_dev_if;
4447
4448 if (ibnl_put_attr(skb, nlh,
4449 rdma_addr_size(cma_src_addr(id_priv)),
4450 cma_src_addr(id_priv),
4451 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR))
4452 goto out;
4453 if (ibnl_put_attr(skb, nlh,
4454 rdma_addr_size(cma_src_addr(id_priv)),
4455 cma_dst_addr(id_priv),
4456 RDMA_NL_RDMA_CM_ATTR_DST_ADDR))
4457 goto out;
4458
4459 id_stats->pid = id_priv->owner;
4460 id_stats->port_space = id->ps;
4461 id_stats->cm_state = id_priv->state;
4462 id_stats->qp_num = id_priv->qp_num;
4463 id_stats->qp_type = id->qp_type;
4464
4465 i_id++;
4466 }
4467
4468 cb->args[1] = 0;
4469 i_dev++;
4470 }
4471
4472 out:
4473 mutex_unlock(&lock);
4474 cb->args[0] = i_dev;
4475 cb->args[1] = i_id;
4476
4477 return skb->len;
4478 }
4479
4480 static const struct ibnl_client_cbs cma_cb_table[] = {
4481 [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats,
4482 .module = THIS_MODULE },
4483 };
4484
4485 static int cma_init_net(struct net *net)
4486 {
4487 struct cma_pernet *pernet = cma_pernet(net);
4488
4489 idr_init(&pernet->tcp_ps);
4490 idr_init(&pernet->udp_ps);
4491 idr_init(&pernet->ipoib_ps);
4492 idr_init(&pernet->ib_ps);
4493
4494 return 0;
4495 }
4496
4497 static void cma_exit_net(struct net *net)
4498 {
4499 struct cma_pernet *pernet = cma_pernet(net);
4500
4501 idr_destroy(&pernet->tcp_ps);
4502 idr_destroy(&pernet->udp_ps);
4503 idr_destroy(&pernet->ipoib_ps);
4504 idr_destroy(&pernet->ib_ps);
4505 }
4506
4507 static struct pernet_operations cma_pernet_operations = {
4508 .init = cma_init_net,
4509 .exit = cma_exit_net,
4510 .id = &cma_pernet_id,
4511 .size = sizeof(struct cma_pernet),
4512 };
4513
4514 static int __init cma_init(void)
4515 {
4516 int ret;
4517
4518 cma_wq = alloc_ordered_workqueue("rdma_cm", WQ_MEM_RECLAIM);
4519 if (!cma_wq)
4520 return -ENOMEM;
4521
4522 ret = register_pernet_subsys(&cma_pernet_operations);
4523 if (ret)
4524 goto err_wq;
4525
4526 ib_sa_register_client(&sa_client);
4527 rdma_addr_register_client(&addr_client);
4528 register_netdevice_notifier(&cma_nb);
4529
4530 ret = ib_register_client(&cma_client);
4531 if (ret)
4532 goto err;
4533
4534 if (ibnl_add_client(RDMA_NL_RDMA_CM, ARRAY_SIZE(cma_cb_table),
4535 cma_cb_table))
4536 pr_warn("RDMA CMA: failed to add netlink callback\n");
4537 cma_configfs_init();
4538
4539 return 0;
4540
4541 err:
4542 unregister_netdevice_notifier(&cma_nb);
4543 rdma_addr_unregister_client(&addr_client);
4544 ib_sa_unregister_client(&sa_client);
4545 err_wq:
4546 destroy_workqueue(cma_wq);
4547 return ret;
4548 }
4549
4550 static void __exit cma_cleanup(void)
4551 {
4552 cma_configfs_exit();
4553 ibnl_remove_client(RDMA_NL_RDMA_CM);
4554 ib_unregister_client(&cma_client);
4555 unregister_netdevice_notifier(&cma_nb);
4556 rdma_addr_unregister_client(&addr_client);
4557 ib_sa_unregister_client(&sa_client);
4558 unregister_pernet_subsys(&cma_pernet_operations);
4559 destroy_workqueue(cma_wq);
4560 }
4561
4562 module_init(cma_init);
4563 module_exit(cma_cleanup);
CRIS linux kernel tree