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9#include <linux/completion.h>
10#include <linux/in.h>
11#include <linux/in6.h>
12#include <linux/mutex.h>
13#include <linux/random.h>
14#include <linux/igmp.h>
15#include <linux/xarray.h>
16#include <linux/inetdevice.h>
17#include <linux/slab.h>
18#include <linux/module.h>
19#include <net/route.h>
20
21#include <net/net_namespace.h>
22#include <net/netns/generic.h>
23#include <net/tcp.h>
24#include <net/ipv6.h>
25#include <net/ip_fib.h>
26#include <net/ip6_route.h>
27
28#include <rdma/rdma_cm.h>
29#include <rdma/rdma_cm_ib.h>
30#include <rdma/rdma_netlink.h>
31#include <rdma/ib.h>
32#include <rdma/ib_cache.h>
33#include <rdma/ib_cm.h>
34#include <rdma/ib_sa.h>
35#include <rdma/iw_cm.h>
36
37#include "core_priv.h"
38#include "cma_priv.h"
39#include "cma_trace.h"
40
41MODULE_AUTHOR("Sean Hefty");
42MODULE_DESCRIPTION("Generic RDMA CM Agent");
43MODULE_LICENSE("Dual BSD/GPL");
44
45#define CMA_CM_RESPONSE_TIMEOUT 20
46#define CMA_QUERY_CLASSPORT_INFO_TIMEOUT 3000
47#define CMA_MAX_CM_RETRIES 15
48#define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
49#define CMA_IBOE_PACKET_LIFETIME 18
50#define CMA_PREFERRED_ROCE_GID_TYPE IB_GID_TYPE_ROCE_UDP_ENCAP
51
52static const char * const cma_events[] = {
53 [RDMA_CM_EVENT_ADDR_RESOLVED] = "address resolved",
54 [RDMA_CM_EVENT_ADDR_ERROR] = "address error",
55 [RDMA_CM_EVENT_ROUTE_RESOLVED] = "route resolved ",
56 [RDMA_CM_EVENT_ROUTE_ERROR] = "route error",
57 [RDMA_CM_EVENT_CONNECT_REQUEST] = "connect request",
58 [RDMA_CM_EVENT_CONNECT_RESPONSE] = "connect response",
59 [RDMA_CM_EVENT_CONNECT_ERROR] = "connect error",
60 [RDMA_CM_EVENT_UNREACHABLE] = "unreachable",
61 [RDMA_CM_EVENT_REJECTED] = "rejected",
62 [RDMA_CM_EVENT_ESTABLISHED] = "established",
63 [RDMA_CM_EVENT_DISCONNECTED] = "disconnected",
64 [RDMA_CM_EVENT_DEVICE_REMOVAL] = "device removal",
65 [RDMA_CM_EVENT_MULTICAST_JOIN] = "multicast join",
66 [RDMA_CM_EVENT_MULTICAST_ERROR] = "multicast error",
67 [RDMA_CM_EVENT_ADDR_CHANGE] = "address change",
68 [RDMA_CM_EVENT_TIMEWAIT_EXIT] = "timewait exit",
69};
70
71const char *__attribute_const__ rdma_event_msg(enum rdma_cm_event_type event)
72{
73 size_t index = event;
74
75 return (index < ARRAY_SIZE(cma_events) && cma_events[index]) ?
76 cma_events[index] : "unrecognized event";
77}
78EXPORT_SYMBOL(rdma_event_msg);
79
80const char *__attribute_const__ rdma_reject_msg(struct rdma_cm_id *id,
81 int reason)
82{
83 if (rdma_ib_or_roce(id->device, id->port_num))
84 return ibcm_reject_msg(reason);
85
86 if (rdma_protocol_iwarp(id->device, id->port_num))
87 return iwcm_reject_msg(reason);
88
89 WARN_ON_ONCE(1);
90 return "unrecognized transport";
91}
92EXPORT_SYMBOL(rdma_reject_msg);
93
94
95
96
97
98
99
100static bool rdma_is_consumer_reject(struct rdma_cm_id *id, int reason)
101{
102 if (rdma_ib_or_roce(id->device, id->port_num))
103 return reason == IB_CM_REJ_CONSUMER_DEFINED;
104
105 if (rdma_protocol_iwarp(id->device, id->port_num))
106 return reason == -ECONNREFUSED;
107
108 WARN_ON_ONCE(1);
109 return false;
110}
111
112const void *rdma_consumer_reject_data(struct rdma_cm_id *id,
113 struct rdma_cm_event *ev, u8 *data_len)
114{
115 const void *p;
116
117 if (rdma_is_consumer_reject(id, ev->status)) {
118 *data_len = ev->param.conn.private_data_len;
119 p = ev->param.conn.private_data;
120 } else {
121 *data_len = 0;
122 p = NULL;
123 }
124 return p;
125}
126EXPORT_SYMBOL(rdma_consumer_reject_data);
127
128
129
130
131
132struct iw_cm_id *rdma_iw_cm_id(struct rdma_cm_id *id)
133{
134 struct rdma_id_private *id_priv;
135
136 id_priv = container_of(id, struct rdma_id_private, id);
137 if (id->device->node_type == RDMA_NODE_RNIC)
138 return id_priv->cm_id.iw;
139 return NULL;
140}
141EXPORT_SYMBOL(rdma_iw_cm_id);
142
143
144
145
146
147struct rdma_cm_id *rdma_res_to_id(struct rdma_restrack_entry *res)
148{
149 struct rdma_id_private *id_priv =
150 container_of(res, struct rdma_id_private, res);
151
152 return &id_priv->id;
153}
154EXPORT_SYMBOL(rdma_res_to_id);
155
156static int cma_add_one(struct ib_device *device);
157static void cma_remove_one(struct ib_device *device, void *client_data);
158
159static struct ib_client cma_client = {
160 .name = "cma",
161 .add = cma_add_one,
162 .remove = cma_remove_one
163};
164
165static struct ib_sa_client sa_client;
166static LIST_HEAD(dev_list);
167static LIST_HEAD(listen_any_list);
168static DEFINE_MUTEX(lock);
169static struct workqueue_struct *cma_wq;
170static unsigned int cma_pernet_id;
171
172struct cma_pernet {
173 struct xarray tcp_ps;
174 struct xarray udp_ps;
175 struct xarray ipoib_ps;
176 struct xarray ib_ps;
177};
178
179static struct cma_pernet *cma_pernet(struct net *net)
180{
181 return net_generic(net, cma_pernet_id);
182}
183
184static
185struct xarray *cma_pernet_xa(struct net *net, enum rdma_ucm_port_space ps)
186{
187 struct cma_pernet *pernet = cma_pernet(net);
188
189 switch (ps) {
190 case RDMA_PS_TCP:
191 return &pernet->tcp_ps;
192 case RDMA_PS_UDP:
193 return &pernet->udp_ps;
194 case RDMA_PS_IPOIB:
195 return &pernet->ipoib_ps;
196 case RDMA_PS_IB:
197 return &pernet->ib_ps;
198 default:
199 return NULL;
200 }
201}
202
203struct cma_device {
204 struct list_head list;
205 struct ib_device *device;
206 struct completion comp;
207 refcount_t refcount;
208 struct list_head id_list;
209 enum ib_gid_type *default_gid_type;
210 u8 *default_roce_tos;
211};
212
213struct rdma_bind_list {
214 enum rdma_ucm_port_space ps;
215 struct hlist_head owners;
216 unsigned short port;
217};
218
219struct class_port_info_context {
220 struct ib_class_port_info *class_port_info;
221 struct ib_device *device;
222 struct completion done;
223 struct ib_sa_query *sa_query;
224 u8 port_num;
225};
226
227static int cma_ps_alloc(struct net *net, enum rdma_ucm_port_space ps,
228 struct rdma_bind_list *bind_list, int snum)
229{
230 struct xarray *xa = cma_pernet_xa(net, ps);
231
232 return xa_insert(xa, snum, bind_list, GFP_KERNEL);
233}
234
235static struct rdma_bind_list *cma_ps_find(struct net *net,
236 enum rdma_ucm_port_space ps, int snum)
237{
238 struct xarray *xa = cma_pernet_xa(net, ps);
239
240 return xa_load(xa, snum);
241}
242
243static void cma_ps_remove(struct net *net, enum rdma_ucm_port_space ps,
244 int snum)
245{
246 struct xarray *xa = cma_pernet_xa(net, ps);
247
248 xa_erase(xa, snum);
249}
250
251enum {
252 CMA_OPTION_AFONLY,
253};
254
255void cma_dev_get(struct cma_device *cma_dev)
256{
257 refcount_inc(&cma_dev->refcount);
258}
259
260void cma_dev_put(struct cma_device *cma_dev)
261{
262 if (refcount_dec_and_test(&cma_dev->refcount))
263 complete(&cma_dev->comp);
264}
265
266struct cma_device *cma_enum_devices_by_ibdev(cma_device_filter filter,
267 void *cookie)
268{
269 struct cma_device *cma_dev;
270 struct cma_device *found_cma_dev = NULL;
271
272 mutex_lock(&lock);
273
274 list_for_each_entry(cma_dev, &dev_list, list)
275 if (filter(cma_dev->device, cookie)) {
276 found_cma_dev = cma_dev;
277 break;
278 }
279
280 if (found_cma_dev)
281 cma_dev_get(found_cma_dev);
282 mutex_unlock(&lock);
283 return found_cma_dev;
284}
285
286int cma_get_default_gid_type(struct cma_device *cma_dev,
287 unsigned int port)
288{
289 if (!rdma_is_port_valid(cma_dev->device, port))
290 return -EINVAL;
291
292 return cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)];
293}
294
295int cma_set_default_gid_type(struct cma_device *cma_dev,
296 unsigned int port,
297 enum ib_gid_type default_gid_type)
298{
299 unsigned long supported_gids;
300
301 if (!rdma_is_port_valid(cma_dev->device, port))
302 return -EINVAL;
303
304 supported_gids = roce_gid_type_mask_support(cma_dev->device, port);
305
306 if (!(supported_gids & 1 << default_gid_type))
307 return -EINVAL;
308
309 cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)] =
310 default_gid_type;
311
312 return 0;
313}
314
315int cma_get_default_roce_tos(struct cma_device *cma_dev, unsigned int port)
316{
317 if (!rdma_is_port_valid(cma_dev->device, port))
318 return -EINVAL;
319
320 return cma_dev->default_roce_tos[port - rdma_start_port(cma_dev->device)];
321}
322
323int cma_set_default_roce_tos(struct cma_device *cma_dev, unsigned int port,
324 u8 default_roce_tos)
325{
326 if (!rdma_is_port_valid(cma_dev->device, port))
327 return -EINVAL;
328
329 cma_dev->default_roce_tos[port - rdma_start_port(cma_dev->device)] =
330 default_roce_tos;
331
332 return 0;
333}
334struct ib_device *cma_get_ib_dev(struct cma_device *cma_dev)
335{
336 return cma_dev->device;
337}
338
339
340
341
342
343
344
345
346struct cma_multicast {
347 struct rdma_id_private *id_priv;
348 union {
349 struct ib_sa_multicast *ib;
350 } multicast;
351 struct list_head list;
352 void *context;
353 struct sockaddr_storage addr;
354 struct kref mcref;
355 u8 join_state;
356};
357
358struct cma_work {
359 struct work_struct work;
360 struct rdma_id_private *id;
361 enum rdma_cm_state old_state;
362 enum rdma_cm_state new_state;
363 struct rdma_cm_event event;
364};
365
366struct cma_ndev_work {
367 struct work_struct work;
368 struct rdma_id_private *id;
369 struct rdma_cm_event event;
370};
371
372struct iboe_mcast_work {
373 struct work_struct work;
374 struct rdma_id_private *id;
375 struct cma_multicast *mc;
376};
377
378union cma_ip_addr {
379 struct in6_addr ip6;
380 struct {
381 __be32 pad[3];
382 __be32 addr;
383 } ip4;
384};
385
386struct cma_hdr {
387 u8 cma_version;
388 u8 ip_version;
389 __be16 port;
390 union cma_ip_addr src_addr;
391 union cma_ip_addr dst_addr;
392};
393
394#define CMA_VERSION 0x00
395
396struct cma_req_info {
397 struct sockaddr_storage listen_addr_storage;
398 struct sockaddr_storage src_addr_storage;
399 struct ib_device *device;
400 union ib_gid local_gid;
401 __be64 service_id;
402 int port;
403 bool has_gid;
404 u16 pkey;
405};
406
407static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp)
408{
409 unsigned long flags;
410 int ret;
411
412 spin_lock_irqsave(&id_priv->lock, flags);
413 ret = (id_priv->state == comp);
414 spin_unlock_irqrestore(&id_priv->lock, flags);
415 return ret;
416}
417
418static int cma_comp_exch(struct rdma_id_private *id_priv,
419 enum rdma_cm_state comp, enum rdma_cm_state exch)
420{
421 unsigned long flags;
422 int ret;
423
424 spin_lock_irqsave(&id_priv->lock, flags);
425 if ((ret = (id_priv->state == comp)))
426 id_priv->state = exch;
427 spin_unlock_irqrestore(&id_priv->lock, flags);
428 return ret;
429}
430
431static inline u8 cma_get_ip_ver(const struct cma_hdr *hdr)
432{
433 return hdr->ip_version >> 4;
434}
435
436static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
437{
438 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
439}
440
441static int cma_igmp_send(struct net_device *ndev, union ib_gid *mgid, bool join)
442{
443 struct in_device *in_dev = NULL;
444
445 if (ndev) {
446 rtnl_lock();
447 in_dev = __in_dev_get_rtnl(ndev);
448 if (in_dev) {
449 if (join)
450 ip_mc_inc_group(in_dev,
451 *(__be32 *)(mgid->raw + 12));
452 else
453 ip_mc_dec_group(in_dev,
454 *(__be32 *)(mgid->raw + 12));
455 }
456 rtnl_unlock();
457 }
458 return (in_dev) ? 0 : -ENODEV;
459}
460
461static void _cma_attach_to_dev(struct rdma_id_private *id_priv,
462 struct cma_device *cma_dev)
463{
464 cma_dev_get(cma_dev);
465 id_priv->cma_dev = cma_dev;
466 id_priv->id.device = cma_dev->device;
467 id_priv->id.route.addr.dev_addr.transport =
468 rdma_node_get_transport(cma_dev->device->node_type);
469 list_add_tail(&id_priv->list, &cma_dev->id_list);
470 if (id_priv->res.kern_name)
471 rdma_restrack_kadd(&id_priv->res);
472 else
473 rdma_restrack_uadd(&id_priv->res);
474 trace_cm_id_attach(id_priv, cma_dev->device);
475}
476
477static void cma_attach_to_dev(struct rdma_id_private *id_priv,
478 struct cma_device *cma_dev)
479{
480 _cma_attach_to_dev(id_priv, cma_dev);
481 id_priv->gid_type =
482 cma_dev->default_gid_type[id_priv->id.port_num -
483 rdma_start_port(cma_dev->device)];
484}
485
486static inline void release_mc(struct kref *kref)
487{
488 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
489
490 kfree(mc->multicast.ib);
491 kfree(mc);
492}
493
494static void cma_release_dev(struct rdma_id_private *id_priv)
495{
496 mutex_lock(&lock);
497 list_del(&id_priv->list);
498 cma_dev_put(id_priv->cma_dev);
499 id_priv->cma_dev = NULL;
500 mutex_unlock(&lock);
501}
502
503static inline struct sockaddr *cma_src_addr(struct rdma_id_private *id_priv)
504{
505 return (struct sockaddr *) &id_priv->id.route.addr.src_addr;
506}
507
508static inline struct sockaddr *cma_dst_addr(struct rdma_id_private *id_priv)
509{
510 return (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
511}
512
513static inline unsigned short cma_family(struct rdma_id_private *id_priv)
514{
515 return id_priv->id.route.addr.src_addr.ss_family;
516}
517
518static int cma_set_qkey(struct rdma_id_private *id_priv, u32 qkey)
519{
520 struct ib_sa_mcmember_rec rec;
521 int ret = 0;
522
523 if (id_priv->qkey) {
524 if (qkey && id_priv->qkey != qkey)
525 return -EINVAL;
526 return 0;
527 }
528
529 if (qkey) {
530 id_priv->qkey = qkey;
531 return 0;
532 }
533
534 switch (id_priv->id.ps) {
535 case RDMA_PS_UDP:
536 case RDMA_PS_IB:
537 id_priv->qkey = RDMA_UDP_QKEY;
538 break;
539 case RDMA_PS_IPOIB:
540 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
541 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
542 id_priv->id.port_num, &rec.mgid,
543 &rec);
544 if (!ret)
545 id_priv->qkey = be32_to_cpu(rec.qkey);
546 break;
547 default:
548 break;
549 }
550 return ret;
551}
552
553static void cma_translate_ib(struct sockaddr_ib *sib, struct rdma_dev_addr *dev_addr)
554{
555 dev_addr->dev_type = ARPHRD_INFINIBAND;
556 rdma_addr_set_sgid(dev_addr, (union ib_gid *) &sib->sib_addr);
557 ib_addr_set_pkey(dev_addr, ntohs(sib->sib_pkey));
558}
559
560static int cma_translate_addr(struct sockaddr *addr, struct rdma_dev_addr *dev_addr)
561{
562 int ret;
563
564 if (addr->sa_family != AF_IB) {
565 ret = rdma_translate_ip(addr, dev_addr);
566 } else {
567 cma_translate_ib((struct sockaddr_ib *) addr, dev_addr);
568 ret = 0;
569 }
570
571 return ret;
572}
573
574static const struct ib_gid_attr *
575cma_validate_port(struct ib_device *device, u8 port,
576 enum ib_gid_type gid_type,
577 union ib_gid *gid,
578 struct rdma_id_private *id_priv)
579{
580 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
581 int bound_if_index = dev_addr->bound_dev_if;
582 const struct ib_gid_attr *sgid_attr;
583 int dev_type = dev_addr->dev_type;
584 struct net_device *ndev = NULL;
585
586 if (!rdma_dev_access_netns(device, id_priv->id.route.addr.dev_addr.net))
587 return ERR_PTR(-ENODEV);
588
589 if ((dev_type == ARPHRD_INFINIBAND) && !rdma_protocol_ib(device, port))
590 return ERR_PTR(-ENODEV);
591
592 if ((dev_type != ARPHRD_INFINIBAND) && rdma_protocol_ib(device, port))
593 return ERR_PTR(-ENODEV);
594
595 if (dev_type == ARPHRD_ETHER && rdma_protocol_roce(device, port)) {
596 ndev = dev_get_by_index(dev_addr->net, bound_if_index);
597 if (!ndev)
598 return ERR_PTR(-ENODEV);
599 } else {
600 gid_type = IB_GID_TYPE_IB;
601 }
602
603 sgid_attr = rdma_find_gid_by_port(device, gid, gid_type, port, ndev);
604 if (ndev)
605 dev_put(ndev);
606 return sgid_attr;
607}
608
609static void cma_bind_sgid_attr(struct rdma_id_private *id_priv,
610 const struct ib_gid_attr *sgid_attr)
611{
612 WARN_ON(id_priv->id.route.addr.dev_addr.sgid_attr);
613 id_priv->id.route.addr.dev_addr.sgid_attr = sgid_attr;
614}
615
616
617
618
619
620
621
622
623
624
625static int cma_acquire_dev_by_src_ip(struct rdma_id_private *id_priv)
626{
627 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
628 const struct ib_gid_attr *sgid_attr;
629 union ib_gid gid, iboe_gid, *gidp;
630 struct cma_device *cma_dev;
631 enum ib_gid_type gid_type;
632 int ret = -ENODEV;
633 unsigned int port;
634
635 if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
636 id_priv->id.ps == RDMA_PS_IPOIB)
637 return -EINVAL;
638
639 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
640 &iboe_gid);
641
642 memcpy(&gid, dev_addr->src_dev_addr +
643 rdma_addr_gid_offset(dev_addr), sizeof(gid));
644
645 mutex_lock(&lock);
646 list_for_each_entry(cma_dev, &dev_list, list) {
647 rdma_for_each_port (cma_dev->device, port) {
648 gidp = rdma_protocol_roce(cma_dev->device, port) ?
649 &iboe_gid : &gid;
650 gid_type = cma_dev->default_gid_type[port - 1];
651 sgid_attr = cma_validate_port(cma_dev->device, port,
652 gid_type, gidp, id_priv);
653 if (!IS_ERR(sgid_attr)) {
654 id_priv->id.port_num = port;
655 cma_bind_sgid_attr(id_priv, sgid_attr);
656 cma_attach_to_dev(id_priv, cma_dev);
657 ret = 0;
658 goto out;
659 }
660 }
661 }
662out:
663 mutex_unlock(&lock);
664 return ret;
665}
666
667
668
669
670
671
672
673
674
675
676
677
678static int cma_ib_acquire_dev(struct rdma_id_private *id_priv,
679 const struct rdma_id_private *listen_id_priv,
680 struct cma_req_info *req)
681{
682 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
683 const struct ib_gid_attr *sgid_attr;
684 enum ib_gid_type gid_type;
685 union ib_gid gid;
686
687 if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
688 id_priv->id.ps == RDMA_PS_IPOIB)
689 return -EINVAL;
690
691 if (rdma_protocol_roce(req->device, req->port))
692 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
693 &gid);
694 else
695 memcpy(&gid, dev_addr->src_dev_addr +
696 rdma_addr_gid_offset(dev_addr), sizeof(gid));
697
698 gid_type = listen_id_priv->cma_dev->default_gid_type[req->port - 1];
699 sgid_attr = cma_validate_port(req->device, req->port,
700 gid_type, &gid, id_priv);
701 if (IS_ERR(sgid_attr))
702 return PTR_ERR(sgid_attr);
703
704 id_priv->id.port_num = req->port;
705 cma_bind_sgid_attr(id_priv, sgid_attr);
706
707
708
709
710 mutex_lock(&lock);
711 cma_attach_to_dev(id_priv, listen_id_priv->cma_dev);
712 mutex_unlock(&lock);
713 return 0;
714}
715
716static int cma_iw_acquire_dev(struct rdma_id_private *id_priv,
717 const struct rdma_id_private *listen_id_priv)
718{
719 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
720 const struct ib_gid_attr *sgid_attr;
721 struct cma_device *cma_dev;
722 enum ib_gid_type gid_type;
723 int ret = -ENODEV;
724 unsigned int port;
725 union ib_gid gid;
726
727 if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
728 id_priv->id.ps == RDMA_PS_IPOIB)
729 return -EINVAL;
730
731 memcpy(&gid, dev_addr->src_dev_addr +
732 rdma_addr_gid_offset(dev_addr), sizeof(gid));
733
734 mutex_lock(&lock);
735
736 cma_dev = listen_id_priv->cma_dev;
737 port = listen_id_priv->id.port_num;
738 gid_type = listen_id_priv->gid_type;
739 sgid_attr = cma_validate_port(cma_dev->device, port,
740 gid_type, &gid, id_priv);
741 if (!IS_ERR(sgid_attr)) {
742 id_priv->id.port_num = port;
743 cma_bind_sgid_attr(id_priv, sgid_attr);
744 ret = 0;
745 goto out;
746 }
747
748 list_for_each_entry(cma_dev, &dev_list, list) {
749 rdma_for_each_port (cma_dev->device, port) {
750 if (listen_id_priv->cma_dev == cma_dev &&
751 listen_id_priv->id.port_num == port)
752 continue;
753
754 gid_type = cma_dev->default_gid_type[port - 1];
755 sgid_attr = cma_validate_port(cma_dev->device, port,
756 gid_type, &gid, id_priv);
757 if (!IS_ERR(sgid_attr)) {
758 id_priv->id.port_num = port;
759 cma_bind_sgid_attr(id_priv, sgid_attr);
760 ret = 0;
761 goto out;
762 }
763 }
764 }
765
766out:
767 if (!ret)
768 cma_attach_to_dev(id_priv, cma_dev);
769
770 mutex_unlock(&lock);
771 return ret;
772}
773
774
775
776
777static int cma_resolve_ib_dev(struct rdma_id_private *id_priv)
778{
779 struct cma_device *cma_dev, *cur_dev;
780 struct sockaddr_ib *addr;
781 union ib_gid gid, sgid, *dgid;
782 unsigned int p;
783 u16 pkey, index;
784 enum ib_port_state port_state;
785 int i;
786
787 cma_dev = NULL;
788 addr = (struct sockaddr_ib *) cma_dst_addr(id_priv);
789 dgid = (union ib_gid *) &addr->sib_addr;
790 pkey = ntohs(addr->sib_pkey);
791
792 mutex_lock(&lock);
793 list_for_each_entry(cur_dev, &dev_list, list) {
794 rdma_for_each_port (cur_dev->device, p) {
795 if (!rdma_cap_af_ib(cur_dev->device, p))
796 continue;
797
798 if (ib_find_cached_pkey(cur_dev->device, p, pkey, &index))
799 continue;
800
801 if (ib_get_cached_port_state(cur_dev->device, p, &port_state))
802 continue;
803 for (i = 0; !rdma_query_gid(cur_dev->device,
804 p, i, &gid);
805 i++) {
806 if (!memcmp(&gid, dgid, sizeof(gid))) {
807 cma_dev = cur_dev;
808 sgid = gid;
809 id_priv->id.port_num = p;
810 goto found;
811 }
812
813 if (!cma_dev && (gid.global.subnet_prefix ==
814 dgid->global.subnet_prefix) &&
815 port_state == IB_PORT_ACTIVE) {
816 cma_dev = cur_dev;
817 sgid = gid;
818 id_priv->id.port_num = p;
819 goto found;
820 }
821 }
822 }
823 }
824 mutex_unlock(&lock);
825 return -ENODEV;
826
827found:
828 cma_attach_to_dev(id_priv, cma_dev);
829 mutex_unlock(&lock);
830 addr = (struct sockaddr_ib *)cma_src_addr(id_priv);
831 memcpy(&addr->sib_addr, &sgid, sizeof(sgid));
832 cma_translate_ib(addr, &id_priv->id.route.addr.dev_addr);
833 return 0;
834}
835
836static void cma_id_get(struct rdma_id_private *id_priv)
837{
838 refcount_inc(&id_priv->refcount);
839}
840
841static void cma_id_put(struct rdma_id_private *id_priv)
842{
843 if (refcount_dec_and_test(&id_priv->refcount))
844 complete(&id_priv->comp);
845}
846
847struct rdma_cm_id *__rdma_create_id(struct net *net,
848 rdma_cm_event_handler event_handler,
849 void *context, enum rdma_ucm_port_space ps,
850 enum ib_qp_type qp_type, const char *caller)
851{
852 struct rdma_id_private *id_priv;
853
854 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
855 if (!id_priv)
856 return ERR_PTR(-ENOMEM);
857
858 rdma_restrack_set_task(&id_priv->res, caller);
859 id_priv->res.type = RDMA_RESTRACK_CM_ID;
860 id_priv->state = RDMA_CM_IDLE;
861 id_priv->id.context = context;
862 id_priv->id.event_handler = event_handler;
863 id_priv->id.ps = ps;
864 id_priv->id.qp_type = qp_type;
865 id_priv->tos_set = false;
866 id_priv->timeout_set = false;
867 id_priv->gid_type = IB_GID_TYPE_IB;
868 spin_lock_init(&id_priv->lock);
869 mutex_init(&id_priv->qp_mutex);
870 init_completion(&id_priv->comp);
871 refcount_set(&id_priv->refcount, 1);
872 mutex_init(&id_priv->handler_mutex);
873 INIT_LIST_HEAD(&id_priv->listen_list);
874 INIT_LIST_HEAD(&id_priv->mc_list);
875 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
876 id_priv->id.route.addr.dev_addr.net = get_net(net);
877 id_priv->seq_num &= 0x00ffffff;
878
879 return &id_priv->id;
880}
881EXPORT_SYMBOL(__rdma_create_id);
882
883static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
884{
885 struct ib_qp_attr qp_attr;
886 int qp_attr_mask, ret;
887
888 qp_attr.qp_state = IB_QPS_INIT;
889 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
890 if (ret)
891 return ret;
892
893 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
894 if (ret)
895 return ret;
896
897 qp_attr.qp_state = IB_QPS_RTR;
898 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
899 if (ret)
900 return ret;
901
902 qp_attr.qp_state = IB_QPS_RTS;
903 qp_attr.sq_psn = 0;
904 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
905
906 return ret;
907}
908
909static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
910{
911 struct ib_qp_attr qp_attr;
912 int qp_attr_mask, ret;
913
914 qp_attr.qp_state = IB_QPS_INIT;
915 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
916 if (ret)
917 return ret;
918
919 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
920}
921
922int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
923 struct ib_qp_init_attr *qp_init_attr)
924{
925 struct rdma_id_private *id_priv;
926 struct ib_qp *qp;
927 int ret;
928
929 id_priv = container_of(id, struct rdma_id_private, id);
930 if (id->device != pd->device) {
931 ret = -EINVAL;
932 goto out_err;
933 }
934
935 qp_init_attr->port_num = id->port_num;
936 qp = ib_create_qp(pd, qp_init_attr);
937 if (IS_ERR(qp)) {
938 ret = PTR_ERR(qp);
939 goto out_err;
940 }
941
942 if (id->qp_type == IB_QPT_UD)
943 ret = cma_init_ud_qp(id_priv, qp);
944 else
945 ret = cma_init_conn_qp(id_priv, qp);
946 if (ret)
947 goto out_destroy;
948
949 id->qp = qp;
950 id_priv->qp_num = qp->qp_num;
951 id_priv->srq = (qp->srq != NULL);
952 trace_cm_qp_create(id_priv, pd, qp_init_attr, 0);
953 return 0;
954out_destroy:
955 ib_destroy_qp(qp);
956out_err:
957 trace_cm_qp_create(id_priv, pd, qp_init_attr, ret);
958 return ret;
959}
960EXPORT_SYMBOL(rdma_create_qp);
961
962void rdma_destroy_qp(struct rdma_cm_id *id)
963{
964 struct rdma_id_private *id_priv;
965
966 id_priv = container_of(id, struct rdma_id_private, id);
967 trace_cm_qp_destroy(id_priv);
968 mutex_lock(&id_priv->qp_mutex);
969 ib_destroy_qp(id_priv->id.qp);
970 id_priv->id.qp = NULL;
971 mutex_unlock(&id_priv->qp_mutex);
972}
973EXPORT_SYMBOL(rdma_destroy_qp);
974
975static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
976 struct rdma_conn_param *conn_param)
977{
978 struct ib_qp_attr qp_attr;
979 int qp_attr_mask, ret;
980
981 mutex_lock(&id_priv->qp_mutex);
982 if (!id_priv->id.qp) {
983 ret = 0;
984 goto out;
985 }
986
987
988 qp_attr.qp_state = IB_QPS_INIT;
989 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
990 if (ret)
991 goto out;
992
993 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
994 if (ret)
995 goto out;
996
997 qp_attr.qp_state = IB_QPS_RTR;
998 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
999 if (ret)
1000 goto out;
1001
1002 BUG_ON(id_priv->cma_dev->device != id_priv->id.device);
1003
1004 if (conn_param)
1005 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
1006 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
1007out:
1008 mutex_unlock(&id_priv->qp_mutex);
1009 return ret;
1010}
1011
1012static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
1013 struct rdma_conn_param *conn_param)
1014{
1015 struct ib_qp_attr qp_attr;
1016 int qp_attr_mask, ret;
1017
1018 mutex_lock(&id_priv->qp_mutex);
1019 if (!id_priv->id.qp) {
1020 ret = 0;
1021 goto out;
1022 }
1023
1024 qp_attr.qp_state = IB_QPS_RTS;
1025 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
1026 if (ret)
1027 goto out;
1028
1029 if (conn_param)
1030 qp_attr.max_rd_atomic = conn_param->initiator_depth;
1031 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
1032out:
1033 mutex_unlock(&id_priv->qp_mutex);
1034 return ret;
1035}
1036
1037static int cma_modify_qp_err(struct rdma_id_private *id_priv)
1038{
1039 struct ib_qp_attr qp_attr;
1040 int ret;
1041
1042 mutex_lock(&id_priv->qp_mutex);
1043 if (!id_priv->id.qp) {
1044 ret = 0;
1045 goto out;
1046 }
1047
1048 qp_attr.qp_state = IB_QPS_ERR;
1049 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
1050out:
1051 mutex_unlock(&id_priv->qp_mutex);
1052 return ret;
1053}
1054
1055static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
1056 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
1057{
1058 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
1059 int ret;
1060 u16 pkey;
1061
1062 if (rdma_cap_eth_ah(id_priv->id.device, id_priv->id.port_num))
1063 pkey = 0xffff;
1064 else
1065 pkey = ib_addr_get_pkey(dev_addr);
1066
1067 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
1068 pkey, &qp_attr->pkey_index);
1069 if (ret)
1070 return ret;
1071
1072 qp_attr->port_num = id_priv->id.port_num;
1073 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
1074
1075 if (id_priv->id.qp_type == IB_QPT_UD) {
1076 ret = cma_set_qkey(id_priv, 0);
1077 if (ret)
1078 return ret;
1079
1080 qp_attr->qkey = id_priv->qkey;
1081 *qp_attr_mask |= IB_QP_QKEY;
1082 } else {
1083 qp_attr->qp_access_flags = 0;
1084 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
1085 }
1086 return 0;
1087}
1088
1089int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
1090 int *qp_attr_mask)
1091{
1092 struct rdma_id_private *id_priv;
1093 int ret = 0;
1094
1095 id_priv = container_of(id, struct rdma_id_private, id);
1096 if (rdma_cap_ib_cm(id->device, id->port_num)) {
1097 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
1098 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
1099 else
1100 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
1101 qp_attr_mask);
1102
1103 if (qp_attr->qp_state == IB_QPS_RTR)
1104 qp_attr->rq_psn = id_priv->seq_num;
1105 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
1106 if (!id_priv->cm_id.iw) {
1107 qp_attr->qp_access_flags = 0;
1108 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
1109 } else
1110 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
1111 qp_attr_mask);
1112 qp_attr->port_num = id_priv->id.port_num;
1113 *qp_attr_mask |= IB_QP_PORT;
1114 } else
1115 ret = -ENOSYS;
1116
1117 if ((*qp_attr_mask & IB_QP_TIMEOUT) && id_priv->timeout_set)
1118 qp_attr->timeout = id_priv->timeout;
1119
1120 return ret;
1121}
1122EXPORT_SYMBOL(rdma_init_qp_attr);
1123
1124static inline bool cma_zero_addr(const struct sockaddr *addr)
1125{
1126 switch (addr->sa_family) {
1127 case AF_INET:
1128 return ipv4_is_zeronet(((struct sockaddr_in *)addr)->sin_addr.s_addr);
1129 case AF_INET6:
1130 return ipv6_addr_any(&((struct sockaddr_in6 *)addr)->sin6_addr);
1131 case AF_IB:
1132 return ib_addr_any(&((struct sockaddr_ib *)addr)->sib_addr);
1133 default:
1134 return false;
1135 }
1136}
1137
1138static inline bool cma_loopback_addr(const struct sockaddr *addr)
1139{
1140 switch (addr->sa_family) {
1141 case AF_INET:
1142 return ipv4_is_loopback(
1143 ((struct sockaddr_in *)addr)->sin_addr.s_addr);
1144 case AF_INET6:
1145 return ipv6_addr_loopback(
1146 &((struct sockaddr_in6 *)addr)->sin6_addr);
1147 case AF_IB:
1148 return ib_addr_loopback(
1149 &((struct sockaddr_ib *)addr)->sib_addr);
1150 default:
1151 return false;
1152 }
1153}
1154
1155static inline bool cma_any_addr(const struct sockaddr *addr)
1156{
1157 return cma_zero_addr(addr) || cma_loopback_addr(addr);
1158}
1159
1160static int cma_addr_cmp(const struct sockaddr *src, const struct sockaddr *dst)
1161{
1162 if (src->sa_family != dst->sa_family)
1163 return -1;
1164
1165 switch (src->sa_family) {
1166 case AF_INET:
1167 return ((struct sockaddr_in *)src)->sin_addr.s_addr !=
1168 ((struct sockaddr_in *)dst)->sin_addr.s_addr;
1169 case AF_INET6: {
1170 struct sockaddr_in6 *src_addr6 = (struct sockaddr_in6 *)src;
1171 struct sockaddr_in6 *dst_addr6 = (struct sockaddr_in6 *)dst;
1172 bool link_local;
1173
1174 if (ipv6_addr_cmp(&src_addr6->sin6_addr,
1175 &dst_addr6->sin6_addr))
1176 return 1;
1177 link_local = ipv6_addr_type(&dst_addr6->sin6_addr) &
1178 IPV6_ADDR_LINKLOCAL;
1179
1180 return link_local ? (src_addr6->sin6_scope_id !=
1181 dst_addr6->sin6_scope_id) :
1182 0;
1183 }
1184
1185 default:
1186 return ib_addr_cmp(&((struct sockaddr_ib *) src)->sib_addr,
1187 &((struct sockaddr_ib *) dst)->sib_addr);
1188 }
1189}
1190
1191static __be16 cma_port(const struct sockaddr *addr)
1192{
1193 struct sockaddr_ib *sib;
1194
1195 switch (addr->sa_family) {
1196 case AF_INET:
1197 return ((struct sockaddr_in *) addr)->sin_port;
1198 case AF_INET6:
1199 return ((struct sockaddr_in6 *) addr)->sin6_port;
1200 case AF_IB:
1201 sib = (struct sockaddr_ib *) addr;
1202 return htons((u16) (be64_to_cpu(sib->sib_sid) &
1203 be64_to_cpu(sib->sib_sid_mask)));
1204 default:
1205 return 0;
1206 }
1207}
1208
1209static inline int cma_any_port(const struct sockaddr *addr)
1210{
1211 return !cma_port(addr);
1212}
1213
1214static void cma_save_ib_info(struct sockaddr *src_addr,
1215 struct sockaddr *dst_addr,
1216 const struct rdma_cm_id *listen_id,
1217 const struct sa_path_rec *path)
1218{
1219 struct sockaddr_ib *listen_ib, *ib;
1220
1221 listen_ib = (struct sockaddr_ib *) &listen_id->route.addr.src_addr;
1222 if (src_addr) {
1223 ib = (struct sockaddr_ib *)src_addr;
1224 ib->sib_family = AF_IB;
1225 if (path) {
1226 ib->sib_pkey = path->pkey;
1227 ib->sib_flowinfo = path->flow_label;
1228 memcpy(&ib->sib_addr, &path->sgid, 16);
1229 ib->sib_sid = path->service_id;
1230 ib->sib_scope_id = 0;
1231 } else {
1232 ib->sib_pkey = listen_ib->sib_pkey;
1233 ib->sib_flowinfo = listen_ib->sib_flowinfo;
1234 ib->sib_addr = listen_ib->sib_addr;
1235 ib->sib_sid = listen_ib->sib_sid;
1236 ib->sib_scope_id = listen_ib->sib_scope_id;
1237 }
1238 ib->sib_sid_mask = cpu_to_be64(0xffffffffffffffffULL);
1239 }
1240 if (dst_addr) {
1241 ib = (struct sockaddr_ib *)dst_addr;
1242 ib->sib_family = AF_IB;
1243 if (path) {
1244 ib->sib_pkey = path->pkey;
1245 ib->sib_flowinfo = path->flow_label;
1246 memcpy(&ib->sib_addr, &path->dgid, 16);
1247 }
1248 }
1249}
1250
1251static void cma_save_ip4_info(struct sockaddr_in *src_addr,
1252 struct sockaddr_in *dst_addr,
1253 struct cma_hdr *hdr,
1254 __be16 local_port)
1255{
1256 if (src_addr) {
1257 *src_addr = (struct sockaddr_in) {
1258 .sin_family = AF_INET,
1259 .sin_addr.s_addr = hdr->dst_addr.ip4.addr,
1260 .sin_port = local_port,
1261 };
1262 }
1263
1264 if (dst_addr) {
1265 *dst_addr = (struct sockaddr_in) {
1266 .sin_family = AF_INET,
1267 .sin_addr.s_addr = hdr->src_addr.ip4.addr,
1268 .sin_port = hdr->port,
1269 };
1270 }
1271}
1272
1273static void cma_save_ip6_info(struct sockaddr_in6 *src_addr,
1274 struct sockaddr_in6 *dst_addr,
1275 struct cma_hdr *hdr,
1276 __be16 local_port)
1277{
1278 if (src_addr) {
1279 *src_addr = (struct sockaddr_in6) {
1280 .sin6_family = AF_INET6,
1281 .sin6_addr = hdr->dst_addr.ip6,
1282 .sin6_port = local_port,
1283 };
1284 }
1285
1286 if (dst_addr) {
1287 *dst_addr = (struct sockaddr_in6) {
1288 .sin6_family = AF_INET6,
1289 .sin6_addr = hdr->src_addr.ip6,
1290 .sin6_port = hdr->port,
1291 };
1292 }
1293}
1294
1295static u16 cma_port_from_service_id(__be64 service_id)
1296{
1297 return (u16)be64_to_cpu(service_id);
1298}
1299
1300static int cma_save_ip_info(struct sockaddr *src_addr,
1301 struct sockaddr *dst_addr,
1302 const struct ib_cm_event *ib_event,
1303 __be64 service_id)
1304{
1305 struct cma_hdr *hdr;
1306 __be16 port;
1307
1308 hdr = ib_event->private_data;
1309 if (hdr->cma_version != CMA_VERSION)
1310 return -EINVAL;
1311
1312 port = htons(cma_port_from_service_id(service_id));
1313
1314 switch (cma_get_ip_ver(hdr)) {
1315 case 4:
1316 cma_save_ip4_info((struct sockaddr_in *)src_addr,
1317 (struct sockaddr_in *)dst_addr, hdr, port);
1318 break;
1319 case 6:
1320 cma_save_ip6_info((struct sockaddr_in6 *)src_addr,
1321 (struct sockaddr_in6 *)dst_addr, hdr, port);
1322 break;
1323 default:
1324 return -EAFNOSUPPORT;
1325 }
1326
1327 return 0;
1328}
1329
1330static int cma_save_net_info(struct sockaddr *src_addr,
1331 struct sockaddr *dst_addr,
1332 const struct rdma_cm_id *listen_id,
1333 const struct ib_cm_event *ib_event,
1334 sa_family_t sa_family, __be64 service_id)
1335{
1336 if (sa_family == AF_IB) {
1337 if (ib_event->event == IB_CM_REQ_RECEIVED)
1338 cma_save_ib_info(src_addr, dst_addr, listen_id,
1339 ib_event->param.req_rcvd.primary_path);
1340 else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED)
1341 cma_save_ib_info(src_addr, dst_addr, listen_id, NULL);
1342 return 0;
1343 }
1344
1345 return cma_save_ip_info(src_addr, dst_addr, ib_event, service_id);
1346}
1347
1348static int cma_save_req_info(const struct ib_cm_event *ib_event,
1349 struct cma_req_info *req)
1350{
1351 const struct ib_cm_req_event_param *req_param =
1352 &ib_event->param.req_rcvd;
1353 const struct ib_cm_sidr_req_event_param *sidr_param =
1354 &ib_event->param.sidr_req_rcvd;
1355
1356 switch (ib_event->event) {
1357 case IB_CM_REQ_RECEIVED:
1358 req->device = req_param->listen_id->device;
1359 req->port = req_param->port;
1360 memcpy(&req->local_gid, &req_param->primary_path->sgid,
1361 sizeof(req->local_gid));
1362 req->has_gid = true;
1363 req->service_id = req_param->primary_path->service_id;
1364 req->pkey = be16_to_cpu(req_param->primary_path->pkey);
1365 if (req->pkey != req_param->bth_pkey)
1366 pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and primary path P_Key (0x%x)\n"
1367 "RDMA CMA: in the future this may cause the request to be dropped\n",
1368 req_param->bth_pkey, req->pkey);
1369 break;
1370 case IB_CM_SIDR_REQ_RECEIVED:
1371 req->device = sidr_param->listen_id->device;
1372 req->port = sidr_param->port;
1373 req->has_gid = false;
1374 req->service_id = sidr_param->service_id;
1375 req->pkey = sidr_param->pkey;
1376 if (req->pkey != sidr_param->bth_pkey)
1377 pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and SIDR request payload P_Key (0x%x)\n"
1378 "RDMA CMA: in the future this may cause the request to be dropped\n",
1379 sidr_param->bth_pkey, req->pkey);
1380 break;
1381 default:
1382 return -EINVAL;
1383 }
1384
1385 return 0;
1386}
1387
1388static bool validate_ipv4_net_dev(struct net_device *net_dev,
1389 const struct sockaddr_in *dst_addr,
1390 const struct sockaddr_in *src_addr)
1391{
1392 __be32 daddr = dst_addr->sin_addr.s_addr,
1393 saddr = src_addr->sin_addr.s_addr;
1394 struct fib_result res;
1395 struct flowi4 fl4;
1396 int err;
1397 bool ret;
1398
1399 if (ipv4_is_multicast(saddr) || ipv4_is_lbcast(saddr) ||
1400 ipv4_is_lbcast(daddr) || ipv4_is_zeronet(saddr) ||
1401 ipv4_is_zeronet(daddr) || ipv4_is_loopback(daddr) ||
1402 ipv4_is_loopback(saddr))
1403 return false;
1404
1405 memset(&fl4, 0, sizeof(fl4));
1406 fl4.flowi4_iif = net_dev->ifindex;
1407 fl4.daddr = daddr;
1408 fl4.saddr = saddr;
1409
1410 rcu_read_lock();
1411 err = fib_lookup(dev_net(net_dev), &fl4, &res, 0);
1412 ret = err == 0 && FIB_RES_DEV(res) == net_dev;
1413 rcu_read_unlock();
1414
1415 return ret;
1416}
1417
1418static bool validate_ipv6_net_dev(struct net_device *net_dev,
1419 const struct sockaddr_in6 *dst_addr,
1420 const struct sockaddr_in6 *src_addr)
1421{
1422#if IS_ENABLED(CONFIG_IPV6)
1423 const int strict = ipv6_addr_type(&dst_addr->sin6_addr) &
1424 IPV6_ADDR_LINKLOCAL;
1425 struct rt6_info *rt = rt6_lookup(dev_net(net_dev), &dst_addr->sin6_addr,
1426 &src_addr->sin6_addr, net_dev->ifindex,
1427 NULL, strict);
1428 bool ret;
1429
1430 if (!rt)
1431 return false;
1432
1433 ret = rt->rt6i_idev->dev == net_dev;
1434 ip6_rt_put(rt);
1435
1436 return ret;
1437#else
1438 return false;
1439#endif
1440}
1441
1442static bool validate_net_dev(struct net_device *net_dev,
1443 const struct sockaddr *daddr,
1444 const struct sockaddr *saddr)
1445{
1446 const struct sockaddr_in *daddr4 = (const struct sockaddr_in *)daddr;
1447 const struct sockaddr_in *saddr4 = (const struct sockaddr_in *)saddr;
1448 const struct sockaddr_in6 *daddr6 = (const struct sockaddr_in6 *)daddr;
1449 const struct sockaddr_in6 *saddr6 = (const struct sockaddr_in6 *)saddr;
1450
1451 switch (daddr->sa_family) {
1452 case AF_INET:
1453 return saddr->sa_family == AF_INET &&
1454 validate_ipv4_net_dev(net_dev, daddr4, saddr4);
1455
1456 case AF_INET6:
1457 return saddr->sa_family == AF_INET6 &&
1458 validate_ipv6_net_dev(net_dev, daddr6, saddr6);
1459
1460 default:
1461 return false;
1462 }
1463}
1464
1465static struct net_device *
1466roce_get_net_dev_by_cm_event(const struct ib_cm_event *ib_event)
1467{
1468 const struct ib_gid_attr *sgid_attr = NULL;
1469 struct net_device *ndev;
1470
1471 if (ib_event->event == IB_CM_REQ_RECEIVED)
1472 sgid_attr = ib_event->param.req_rcvd.ppath_sgid_attr;
1473 else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED)
1474 sgid_attr = ib_event->param.sidr_req_rcvd.sgid_attr;
1475
1476 if (!sgid_attr)
1477 return NULL;
1478
1479 rcu_read_lock();
1480 ndev = rdma_read_gid_attr_ndev_rcu(sgid_attr);
1481 if (IS_ERR(ndev))
1482 ndev = NULL;
1483 else
1484 dev_hold(ndev);
1485 rcu_read_unlock();
1486 return ndev;
1487}
1488
1489static struct net_device *cma_get_net_dev(const struct ib_cm_event *ib_event,
1490 struct cma_req_info *req)
1491{
1492 struct sockaddr *listen_addr =
1493 (struct sockaddr *)&req->listen_addr_storage;
1494 struct sockaddr *src_addr = (struct sockaddr *)&req->src_addr_storage;
1495 struct net_device *net_dev;
1496 const union ib_gid *gid = req->has_gid ? &req->local_gid : NULL;
1497 int err;
1498
1499 err = cma_save_ip_info(listen_addr, src_addr, ib_event,
1500 req->service_id);
1501 if (err)
1502 return ERR_PTR(err);
1503
1504 if (rdma_protocol_roce(req->device, req->port))
1505 net_dev = roce_get_net_dev_by_cm_event(ib_event);
1506 else
1507 net_dev = ib_get_net_dev_by_params(req->device, req->port,
1508 req->pkey,
1509 gid, listen_addr);
1510 if (!net_dev)
1511 return ERR_PTR(-ENODEV);
1512
1513 return net_dev;
1514}
1515
1516static enum rdma_ucm_port_space rdma_ps_from_service_id(__be64 service_id)
1517{
1518 return (be64_to_cpu(service_id) >> 16) & 0xffff;
1519}
1520
1521static bool cma_match_private_data(struct rdma_id_private *id_priv,
1522 const struct cma_hdr *hdr)
1523{
1524 struct sockaddr *addr = cma_src_addr(id_priv);
1525 __be32 ip4_addr;
1526 struct in6_addr ip6_addr;
1527
1528 if (cma_any_addr(addr) && !id_priv->afonly)
1529 return true;
1530
1531 switch (addr->sa_family) {
1532 case AF_INET:
1533 ip4_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
1534 if (cma_get_ip_ver(hdr) != 4)
1535 return false;
1536 if (!cma_any_addr(addr) &&
1537 hdr->dst_addr.ip4.addr != ip4_addr)
1538 return false;
1539 break;
1540 case AF_INET6:
1541 ip6_addr = ((struct sockaddr_in6 *)addr)->sin6_addr;
1542 if (cma_get_ip_ver(hdr) != 6)
1543 return false;
1544 if (!cma_any_addr(addr) &&
1545 memcmp(&hdr->dst_addr.ip6, &ip6_addr, sizeof(ip6_addr)))
1546 return false;
1547 break;
1548 case AF_IB:
1549 return true;
1550 default:
1551 return false;
1552 }
1553
1554 return true;
1555}
1556
1557static bool cma_protocol_roce(const struct rdma_cm_id *id)
1558{
1559 struct ib_device *device = id->device;
1560 const int port_num = id->port_num ?: rdma_start_port(device);
1561
1562 return rdma_protocol_roce(device, port_num);
1563}
1564
1565static bool cma_is_req_ipv6_ll(const struct cma_req_info *req)
1566{
1567 const struct sockaddr *daddr =
1568 (const struct sockaddr *)&req->listen_addr_storage;
1569 const struct sockaddr_in6 *daddr6 = (const struct sockaddr_in6 *)daddr;
1570
1571
1572 return (daddr->sa_family == AF_INET6 &&
1573 (ipv6_addr_type(&daddr6->sin6_addr) & IPV6_ADDR_LINKLOCAL));
1574}
1575
1576static bool cma_match_net_dev(const struct rdma_cm_id *id,
1577 const struct net_device *net_dev,
1578 const struct cma_req_info *req)
1579{
1580 const struct rdma_addr *addr = &id->route.addr;
1581
1582 if (!net_dev)
1583
1584 return (!id->port_num || id->port_num == req->port) &&
1585 (addr->src_addr.ss_family == AF_IB);
1586
1587
1588
1589
1590
1591 if (!cma_is_req_ipv6_ll(req))
1592 return true;
1593
1594
1595
1596
1597 if (net_eq(dev_net(net_dev), addr->dev_addr.net) &&
1598 (!!addr->dev_addr.bound_dev_if ==
1599 (addr->dev_addr.bound_dev_if == net_dev->ifindex)))
1600 return true;
1601 else
1602 return false;
1603}
1604
1605static struct rdma_id_private *cma_find_listener(
1606 const struct rdma_bind_list *bind_list,
1607 const struct ib_cm_id *cm_id,
1608 const struct ib_cm_event *ib_event,
1609 const struct cma_req_info *req,
1610 const struct net_device *net_dev)
1611{
1612 struct rdma_id_private *id_priv, *id_priv_dev;
1613
1614 lockdep_assert_held(&lock);
1615
1616 if (!bind_list)
1617 return ERR_PTR(-EINVAL);
1618
1619 hlist_for_each_entry(id_priv, &bind_list->owners, node) {
1620 if (cma_match_private_data(id_priv, ib_event->private_data)) {
1621 if (id_priv->id.device == cm_id->device &&
1622 cma_match_net_dev(&id_priv->id, net_dev, req))
1623 return id_priv;
1624 list_for_each_entry(id_priv_dev,
1625 &id_priv->listen_list,
1626 listen_list) {
1627 if (id_priv_dev->id.device == cm_id->device &&
1628 cma_match_net_dev(&id_priv_dev->id,
1629 net_dev, req))
1630 return id_priv_dev;
1631 }
1632 }
1633 }
1634
1635 return ERR_PTR(-EINVAL);
1636}
1637
1638static struct rdma_id_private *
1639cma_ib_id_from_event(struct ib_cm_id *cm_id,
1640 const struct ib_cm_event *ib_event,
1641 struct cma_req_info *req,
1642 struct net_device **net_dev)
1643{
1644 struct rdma_bind_list *bind_list;
1645 struct rdma_id_private *id_priv;
1646 int err;
1647
1648 err = cma_save_req_info(ib_event, req);
1649 if (err)
1650 return ERR_PTR(err);
1651
1652 *net_dev = cma_get_net_dev(ib_event, req);
1653 if (IS_ERR(*net_dev)) {
1654 if (PTR_ERR(*net_dev) == -EAFNOSUPPORT) {
1655
1656 *net_dev = NULL;
1657 } else {
1658 return ERR_CAST(*net_dev);
1659 }
1660 }
1661
1662 mutex_lock(&lock);
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677 rcu_read_lock();
1678 if (*net_dev) {
1679
1680
1681
1682
1683
1684
1685 if (((*net_dev)->flags & IFF_UP) == 0) {
1686 id_priv = ERR_PTR(-EHOSTUNREACH);
1687 goto err;
1688 }
1689
1690 if (!validate_net_dev(*net_dev,
1691 (struct sockaddr *)&req->listen_addr_storage,
1692 (struct sockaddr *)&req->src_addr_storage)) {
1693 id_priv = ERR_PTR(-EHOSTUNREACH);
1694 goto err;
1695 }
1696 }
1697
1698 bind_list = cma_ps_find(*net_dev ? dev_net(*net_dev) : &init_net,
1699 rdma_ps_from_service_id(req->service_id),
1700 cma_port_from_service_id(req->service_id));
1701 id_priv = cma_find_listener(bind_list, cm_id, ib_event, req, *net_dev);
1702err:
1703 rcu_read_unlock();
1704 mutex_unlock(&lock);
1705 if (IS_ERR(id_priv) && *net_dev) {
1706 dev_put(*net_dev);
1707 *net_dev = NULL;
1708 }
1709 return id_priv;
1710}
1711
1712static inline u8 cma_user_data_offset(struct rdma_id_private *id_priv)
1713{
1714 return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr);
1715}
1716
1717static void cma_cancel_route(struct rdma_id_private *id_priv)
1718{
1719 if (rdma_cap_ib_sa(id_priv->id.device, id_priv->id.port_num)) {
1720 if (id_priv->query)
1721 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
1722 }
1723}
1724
1725static void cma_cancel_listens(struct rdma_id_private *id_priv)
1726{
1727 struct rdma_id_private *dev_id_priv;
1728
1729
1730
1731
1732
1733 mutex_lock(&lock);
1734 list_del(&id_priv->list);
1735
1736 while (!list_empty(&id_priv->listen_list)) {
1737 dev_id_priv = list_entry(id_priv->listen_list.next,
1738 struct rdma_id_private, listen_list);
1739
1740 list_del_init(&dev_id_priv->list);
1741 list_del(&dev_id_priv->listen_list);
1742 mutex_unlock(&lock);
1743
1744 rdma_destroy_id(&dev_id_priv->id);
1745 mutex_lock(&lock);
1746 }
1747 mutex_unlock(&lock);
1748}
1749
1750static void cma_cancel_operation(struct rdma_id_private *id_priv,
1751 enum rdma_cm_state state)
1752{
1753 switch (state) {
1754 case RDMA_CM_ADDR_QUERY:
1755 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
1756 break;
1757 case RDMA_CM_ROUTE_QUERY:
1758 cma_cancel_route(id_priv);
1759 break;
1760 case RDMA_CM_LISTEN:
1761 if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev)
1762 cma_cancel_listens(id_priv);
1763 break;
1764 default:
1765 break;
1766 }
1767}
1768
1769static void cma_release_port(struct rdma_id_private *id_priv)
1770{
1771 struct rdma_bind_list *bind_list = id_priv->bind_list;
1772 struct net *net = id_priv->id.route.addr.dev_addr.net;
1773
1774 if (!bind_list)
1775 return;
1776
1777 mutex_lock(&lock);
1778 hlist_del(&id_priv->node);
1779 if (hlist_empty(&bind_list->owners)) {
1780 cma_ps_remove(net, bind_list->ps, bind_list->port);
1781 kfree(bind_list);
1782 }
1783 mutex_unlock(&lock);
1784}
1785
1786static void cma_leave_roce_mc_group(struct rdma_id_private *id_priv,
1787 struct cma_multicast *mc)
1788{
1789 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
1790 struct net_device *ndev = NULL;
1791
1792 if (dev_addr->bound_dev_if)
1793 ndev = dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
1794 if (ndev) {
1795 cma_igmp_send(ndev, &mc->multicast.ib->rec.mgid, false);
1796 dev_put(ndev);
1797 }
1798 kref_put(&mc->mcref, release_mc);
1799}
1800
1801static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
1802{
1803 struct cma_multicast *mc;
1804
1805 while (!list_empty(&id_priv->mc_list)) {
1806 mc = container_of(id_priv->mc_list.next,
1807 struct cma_multicast, list);
1808 list_del(&mc->list);
1809 if (rdma_cap_ib_mcast(id_priv->cma_dev->device,
1810 id_priv->id.port_num)) {
1811 ib_sa_free_multicast(mc->multicast.ib);
1812 kfree(mc);
1813 } else {
1814 cma_leave_roce_mc_group(id_priv, mc);
1815 }
1816 }
1817}
1818
1819static void _destroy_id(struct rdma_id_private *id_priv,
1820 enum rdma_cm_state state)
1821{
1822 cma_cancel_operation(id_priv, state);
1823
1824 rdma_restrack_del(&id_priv->res);
1825 if (id_priv->cma_dev) {
1826 if (rdma_cap_ib_cm(id_priv->id.device, 1)) {
1827 if (id_priv->cm_id.ib)
1828 ib_destroy_cm_id(id_priv->cm_id.ib);
1829 } else if (rdma_cap_iw_cm(id_priv->id.device, 1)) {
1830 if (id_priv->cm_id.iw)
1831 iw_destroy_cm_id(id_priv->cm_id.iw);
1832 }
1833 cma_leave_mc_groups(id_priv);
1834 cma_release_dev(id_priv);
1835 }
1836
1837 cma_release_port(id_priv);
1838 cma_id_put(id_priv);
1839 wait_for_completion(&id_priv->comp);
1840
1841 if (id_priv->internal_id)
1842 cma_id_put(id_priv->id.context);
1843
1844 kfree(id_priv->id.route.path_rec);
1845
1846 if (id_priv->id.route.addr.dev_addr.sgid_attr)
1847 rdma_put_gid_attr(id_priv->id.route.addr.dev_addr.sgid_attr);
1848
1849 put_net(id_priv->id.route.addr.dev_addr.net);
1850 kfree(id_priv);
1851}
1852
1853
1854
1855
1856
1857static void destroy_id_handler_unlock(struct rdma_id_private *id_priv)
1858 __releases(&idprv->handler_mutex)
1859{
1860 enum rdma_cm_state state;
1861 unsigned long flags;
1862
1863 trace_cm_id_destroy(id_priv);
1864
1865
1866
1867
1868
1869
1870
1871 lockdep_assert_held(&id_priv->handler_mutex);
1872 spin_lock_irqsave(&id_priv->lock, flags);
1873 state = id_priv->state;
1874 id_priv->state = RDMA_CM_DESTROYING;
1875 spin_unlock_irqrestore(&id_priv->lock, flags);
1876 mutex_unlock(&id_priv->handler_mutex);
1877 _destroy_id(id_priv, state);
1878}
1879
1880void rdma_destroy_id(struct rdma_cm_id *id)
1881{
1882 struct rdma_id_private *id_priv =
1883 container_of(id, struct rdma_id_private, id);
1884
1885 mutex_lock(&id_priv->handler_mutex);
1886 destroy_id_handler_unlock(id_priv);
1887}
1888EXPORT_SYMBOL(rdma_destroy_id);
1889
1890static int cma_rep_recv(struct rdma_id_private *id_priv)
1891{
1892 int ret;
1893
1894 ret = cma_modify_qp_rtr(id_priv, NULL);
1895 if (ret)
1896 goto reject;
1897
1898 ret = cma_modify_qp_rts(id_priv, NULL);
1899 if (ret)
1900 goto reject;
1901
1902 trace_cm_send_rtu(id_priv);
1903 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
1904 if (ret)
1905 goto reject;
1906
1907 return 0;
1908reject:
1909 pr_debug_ratelimited("RDMA CM: CONNECT_ERROR: failed to handle reply. status %d\n", ret);
1910 cma_modify_qp_err(id_priv);
1911 trace_cm_send_rej(id_priv);
1912 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
1913 NULL, 0, NULL, 0);
1914 return ret;
1915}
1916
1917static void cma_set_rep_event_data(struct rdma_cm_event *event,
1918 const struct ib_cm_rep_event_param *rep_data,
1919 void *private_data)
1920{
1921 event->param.conn.private_data = private_data;
1922 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
1923 event->param.conn.responder_resources = rep_data->responder_resources;
1924 event->param.conn.initiator_depth = rep_data->initiator_depth;
1925 event->param.conn.flow_control = rep_data->flow_control;
1926 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
1927 event->param.conn.srq = rep_data->srq;
1928 event->param.conn.qp_num = rep_data->remote_qpn;
1929
1930 event->ece.vendor_id = rep_data->ece.vendor_id;
1931 event->ece.attr_mod = rep_data->ece.attr_mod;
1932}
1933
1934static int cma_cm_event_handler(struct rdma_id_private *id_priv,
1935 struct rdma_cm_event *event)
1936{
1937 int ret;
1938
1939 lockdep_assert_held(&id_priv->handler_mutex);
1940
1941 trace_cm_event_handler(id_priv, event);
1942 ret = id_priv->id.event_handler(&id_priv->id, event);
1943 trace_cm_event_done(id_priv, event, ret);
1944 return ret;
1945}
1946
1947static int cma_ib_handler(struct ib_cm_id *cm_id,
1948 const struct ib_cm_event *ib_event)
1949{
1950 struct rdma_id_private *id_priv = cm_id->context;
1951 struct rdma_cm_event event = {};
1952 int ret;
1953
1954 mutex_lock(&id_priv->handler_mutex);
1955 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
1956 id_priv->state != RDMA_CM_CONNECT) ||
1957 (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
1958 id_priv->state != RDMA_CM_DISCONNECT))
1959 goto out;
1960
1961 switch (ib_event->event) {
1962 case IB_CM_REQ_ERROR:
1963 case IB_CM_REP_ERROR:
1964 event.event = RDMA_CM_EVENT_UNREACHABLE;
1965 event.status = -ETIMEDOUT;
1966 break;
1967 case IB_CM_REP_RECEIVED:
1968 if (cma_comp(id_priv, RDMA_CM_CONNECT) &&
1969 (id_priv->id.qp_type != IB_QPT_UD)) {
1970 trace_cm_send_mra(id_priv);
1971 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1972 }
1973 if (id_priv->id.qp) {
1974 event.status = cma_rep_recv(id_priv);
1975 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1976 RDMA_CM_EVENT_ESTABLISHED;
1977 } else {
1978 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
1979 }
1980 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1981 ib_event->private_data);
1982 break;
1983 case IB_CM_RTU_RECEIVED:
1984 case IB_CM_USER_ESTABLISHED:
1985 event.event = RDMA_CM_EVENT_ESTABLISHED;
1986 break;
1987 case IB_CM_DREQ_ERROR:
1988 event.status = -ETIMEDOUT;
1989 fallthrough;
1990 case IB_CM_DREQ_RECEIVED:
1991 case IB_CM_DREP_RECEIVED:
1992 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
1993 RDMA_CM_DISCONNECT))
1994 goto out;
1995 event.event = RDMA_CM_EVENT_DISCONNECTED;
1996 break;
1997 case IB_CM_TIMEWAIT_EXIT:
1998 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1999 break;
2000 case IB_CM_MRA_RECEIVED:
2001
2002 goto out;
2003 case IB_CM_REJ_RECEIVED:
2004 pr_debug_ratelimited("RDMA CM: REJECTED: %s\n", rdma_reject_msg(&id_priv->id,
2005 ib_event->param.rej_rcvd.reason));
2006 cma_modify_qp_err(id_priv);
2007 event.status = ib_event->param.rej_rcvd.reason;
2008 event.event = RDMA_CM_EVENT_REJECTED;
2009 event.param.conn.private_data = ib_event->private_data;
2010 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
2011 break;
2012 default:
2013 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
2014 ib_event->event);
2015 goto out;
2016 }
2017
2018 ret = cma_cm_event_handler(id_priv, &event);
2019 if (ret) {
2020
2021 id_priv->cm_id.ib = NULL;
2022 destroy_id_handler_unlock(id_priv);
2023 return ret;
2024 }
2025out:
2026 mutex_unlock(&id_priv->handler_mutex);
2027 return 0;
2028}
2029
2030static struct rdma_id_private *
2031cma_ib_new_conn_id(const struct rdma_cm_id *listen_id,
2032 const struct ib_cm_event *ib_event,
2033 struct net_device *net_dev)
2034{
2035 struct rdma_id_private *listen_id_priv;
2036 struct rdma_id_private *id_priv;
2037 struct rdma_cm_id *id;
2038 struct rdma_route *rt;
2039 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
2040 struct sa_path_rec *path = ib_event->param.req_rcvd.primary_path;
2041 const __be64 service_id =
2042 ib_event->param.req_rcvd.primary_path->service_id;
2043 int ret;
2044
2045 listen_id_priv = container_of(listen_id, struct rdma_id_private, id);
2046 id = __rdma_create_id(listen_id->route.addr.dev_addr.net,
2047 listen_id->event_handler, listen_id->context,
2048 listen_id->ps, ib_event->param.req_rcvd.qp_type,
2049 listen_id_priv->res.kern_name);
2050 if (IS_ERR(id))
2051 return NULL;
2052
2053 id_priv = container_of(id, struct rdma_id_private, id);
2054 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
2055 (struct sockaddr *)&id->route.addr.dst_addr,
2056 listen_id, ib_event, ss_family, service_id))
2057 goto err;
2058
2059 rt = &id->route;
2060 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
2061 rt->path_rec = kmalloc_array(rt->num_paths, sizeof(*rt->path_rec),
2062 GFP_KERNEL);
2063 if (!rt->path_rec)
2064 goto err;
2065
2066 rt->path_rec[0] = *path;
2067 if (rt->num_paths == 2)
2068 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
2069
2070 if (net_dev) {
2071 rdma_copy_src_l2_addr(&rt->addr.dev_addr, net_dev);
2072 } else {
2073 if (!cma_protocol_roce(listen_id) &&
2074 cma_any_addr(cma_src_addr(id_priv))) {
2075 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
2076 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
2077 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
2078 } else if (!cma_any_addr(cma_src_addr(id_priv))) {
2079 ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr);
2080 if (ret)
2081 goto err;
2082 }
2083 }
2084 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
2085
2086 id_priv->state = RDMA_CM_CONNECT;
2087 return id_priv;
2088
2089err:
2090 rdma_destroy_id(id);
2091 return NULL;
2092}
2093
2094static struct rdma_id_private *
2095cma_ib_new_udp_id(const struct rdma_cm_id *listen_id,
2096 const struct ib_cm_event *ib_event,
2097 struct net_device *net_dev)
2098{
2099 const struct rdma_id_private *listen_id_priv;
2100 struct rdma_id_private *id_priv;
2101 struct rdma_cm_id *id;
2102 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
2103 struct net *net = listen_id->route.addr.dev_addr.net;
2104 int ret;
2105
2106 listen_id_priv = container_of(listen_id, struct rdma_id_private, id);
2107 id = __rdma_create_id(net, listen_id->event_handler, listen_id->context,
2108 listen_id->ps, IB_QPT_UD,
2109 listen_id_priv->res.kern_name);
2110 if (IS_ERR(id))
2111 return NULL;
2112
2113 id_priv = container_of(id, struct rdma_id_private, id);
2114 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
2115 (struct sockaddr *)&id->route.addr.dst_addr,
2116 listen_id, ib_event, ss_family,
2117 ib_event->param.sidr_req_rcvd.service_id))
2118 goto err;
2119
2120 if (net_dev) {
2121 rdma_copy_src_l2_addr(&id->route.addr.dev_addr, net_dev);
2122 } else {
2123 if (!cma_any_addr(cma_src_addr(id_priv))) {
2124 ret = cma_translate_addr(cma_src_addr(id_priv),
2125 &id->route.addr.dev_addr);
2126 if (ret)
2127 goto err;
2128 }
2129 }
2130
2131 id_priv->state = RDMA_CM_CONNECT;
2132 return id_priv;
2133err:
2134 rdma_destroy_id(id);
2135 return NULL;
2136}
2137
2138static void cma_set_req_event_data(struct rdma_cm_event *event,
2139 const struct ib_cm_req_event_param *req_data,
2140 void *private_data, int offset)
2141{
2142 event->param.conn.private_data = private_data + offset;
2143 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
2144 event->param.conn.responder_resources = req_data->responder_resources;
2145 event->param.conn.initiator_depth = req_data->initiator_depth;
2146 event->param.conn.flow_control = req_data->flow_control;
2147 event->param.conn.retry_count = req_data->retry_count;
2148 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
2149 event->param.conn.srq = req_data->srq;
2150 event->param.conn.qp_num = req_data->remote_qpn;
2151
2152 event->ece.vendor_id = req_data->ece.vendor_id;
2153 event->ece.attr_mod = req_data->ece.attr_mod;
2154}
2155
2156static int cma_ib_check_req_qp_type(const struct rdma_cm_id *id,
2157 const struct ib_cm_event *ib_event)
2158{
2159 return (((ib_event->event == IB_CM_REQ_RECEIVED) &&
2160 (ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
2161 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
2162 (id->qp_type == IB_QPT_UD)) ||
2163 (!id->qp_type));
2164}
2165
2166static int cma_ib_req_handler(struct ib_cm_id *cm_id,
2167 const struct ib_cm_event *ib_event)
2168{
2169 struct rdma_id_private *listen_id, *conn_id = NULL;
2170 struct rdma_cm_event event = {};
2171 struct cma_req_info req = {};
2172 struct net_device *net_dev;
2173 u8 offset;
2174 int ret;
2175
2176 listen_id = cma_ib_id_from_event(cm_id, ib_event, &req, &net_dev);
2177 if (IS_ERR(listen_id))
2178 return PTR_ERR(listen_id);
2179
2180 trace_cm_req_handler(listen_id, ib_event->event);
2181 if (!cma_ib_check_req_qp_type(&listen_id->id, ib_event)) {
2182 ret = -EINVAL;
2183 goto net_dev_put;
2184 }
2185
2186 mutex_lock(&listen_id->handler_mutex);
2187 if (listen_id->state != RDMA_CM_LISTEN) {
2188 ret = -ECONNABORTED;
2189 goto err_unlock;
2190 }
2191
2192 offset = cma_user_data_offset(listen_id);
2193 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
2194 if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
2195 conn_id = cma_ib_new_udp_id(&listen_id->id, ib_event, net_dev);
2196 event.param.ud.private_data = ib_event->private_data + offset;
2197 event.param.ud.private_data_len =
2198 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
2199 } else {
2200 conn_id = cma_ib_new_conn_id(&listen_id->id, ib_event, net_dev);
2201 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
2202 ib_event->private_data, offset);
2203 }
2204 if (!conn_id) {
2205 ret = -ENOMEM;
2206 goto err_unlock;
2207 }
2208
2209 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
2210 ret = cma_ib_acquire_dev(conn_id, listen_id, &req);
2211 if (ret) {
2212 destroy_id_handler_unlock(conn_id);
2213 goto err_unlock;
2214 }
2215
2216 conn_id->cm_id.ib = cm_id;
2217 cm_id->context = conn_id;
2218 cm_id->cm_handler = cma_ib_handler;
2219
2220 ret = cma_cm_event_handler(conn_id, &event);
2221 if (ret) {
2222
2223 conn_id->cm_id.ib = NULL;
2224 mutex_unlock(&listen_id->handler_mutex);
2225 destroy_id_handler_unlock(conn_id);
2226 goto net_dev_put;
2227 }
2228
2229 if (cma_comp(conn_id, RDMA_CM_CONNECT) &&
2230 (conn_id->id.qp_type != IB_QPT_UD)) {
2231 trace_cm_send_mra(cm_id->context);
2232 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
2233 }
2234 mutex_unlock(&conn_id->handler_mutex);
2235
2236err_unlock:
2237 mutex_unlock(&listen_id->handler_mutex);
2238
2239net_dev_put:
2240 if (net_dev)
2241 dev_put(net_dev);
2242
2243 return ret;
2244}
2245
2246__be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr)
2247{
2248 if (addr->sa_family == AF_IB)
2249 return ((struct sockaddr_ib *) addr)->sib_sid;
2250
2251 return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr)));
2252}
2253EXPORT_SYMBOL(rdma_get_service_id);
2254
2255void rdma_read_gids(struct rdma_cm_id *cm_id, union ib_gid *sgid,
2256 union ib_gid *dgid)
2257{
2258 struct rdma_addr *addr = &cm_id->route.addr;
2259
2260 if (!cm_id->device) {
2261 if (sgid)
2262 memset(sgid, 0, sizeof(*sgid));
2263 if (dgid)
2264 memset(dgid, 0, sizeof(*dgid));
2265 return;
2266 }
2267
2268 if (rdma_protocol_roce(cm_id->device, cm_id->port_num)) {
2269 if (sgid)
2270 rdma_ip2gid((struct sockaddr *)&addr->src_addr, sgid);
2271 if (dgid)
2272 rdma_ip2gid((struct sockaddr *)&addr->dst_addr, dgid);
2273 } else {
2274 if (sgid)
2275 rdma_addr_get_sgid(&addr->dev_addr, sgid);
2276 if (dgid)
2277 rdma_addr_get_dgid(&addr->dev_addr, dgid);
2278 }
2279}
2280EXPORT_SYMBOL(rdma_read_gids);
2281
2282static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
2283{
2284 struct rdma_id_private *id_priv = iw_id->context;
2285 struct rdma_cm_event event = {};
2286 int ret = 0;
2287 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
2288 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
2289
2290 mutex_lock(&id_priv->handler_mutex);
2291 if (id_priv->state != RDMA_CM_CONNECT)
2292 goto out;
2293
2294 switch (iw_event->event) {
2295 case IW_CM_EVENT_CLOSE:
2296 event.event = RDMA_CM_EVENT_DISCONNECTED;
2297 break;
2298 case IW_CM_EVENT_CONNECT_REPLY:
2299 memcpy(cma_src_addr(id_priv), laddr,
2300 rdma_addr_size(laddr));
2301 memcpy(cma_dst_addr(id_priv), raddr,
2302 rdma_addr_size(raddr));
2303 switch (iw_event->status) {
2304 case 0:
2305 event.event = RDMA_CM_EVENT_ESTABLISHED;
2306 event.param.conn.initiator_depth = iw_event->ird;
2307 event.param.conn.responder_resources = iw_event->ord;
2308 break;
2309 case -ECONNRESET:
2310 case -ECONNREFUSED:
2311 event.event = RDMA_CM_EVENT_REJECTED;
2312 break;
2313 case -ETIMEDOUT:
2314 event.event = RDMA_CM_EVENT_UNREACHABLE;
2315 break;
2316 default:
2317 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
2318 break;
2319 }
2320 break;
2321 case IW_CM_EVENT_ESTABLISHED:
2322 event.event = RDMA_CM_EVENT_ESTABLISHED;
2323 event.param.conn.initiator_depth = iw_event->ird;
2324 event.param.conn.responder_resources = iw_event->ord;
2325 break;
2326 default:
2327 goto out;
2328 }
2329
2330 event.status = iw_event->status;
2331 event.param.conn.private_data = iw_event->private_data;
2332 event.param.conn.private_data_len = iw_event->private_data_len;
2333 ret = cma_cm_event_handler(id_priv, &event);
2334 if (ret) {
2335
2336 id_priv->cm_id.iw = NULL;
2337 destroy_id_handler_unlock(id_priv);
2338 return ret;
2339 }
2340
2341out:
2342 mutex_unlock(&id_priv->handler_mutex);
2343 return ret;
2344}
2345
2346static int iw_conn_req_handler(struct iw_cm_id *cm_id,
2347 struct iw_cm_event *iw_event)
2348{
2349 struct rdma_cm_id *new_cm_id;
2350 struct rdma_id_private *listen_id, *conn_id;
2351 struct rdma_cm_event event = {};
2352 int ret = -ECONNABORTED;
2353 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
2354 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
2355
2356 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
2357 event.param.conn.private_data = iw_event->private_data;
2358 event.param.conn.private_data_len = iw_event->private_data_len;
2359 event.param.conn.initiator_depth = iw_event->ird;
2360 event.param.conn.responder_resources = iw_event->ord;
2361
2362 listen_id = cm_id->context;
2363
2364 mutex_lock(&listen_id->handler_mutex);
2365 if (listen_id->state != RDMA_CM_LISTEN)
2366 goto out;
2367
2368
2369 new_cm_id = __rdma_create_id(listen_id->id.route.addr.dev_addr.net,
2370 listen_id->id.event_handler,
2371 listen_id->id.context,
2372 RDMA_PS_TCP, IB_QPT_RC,
2373 listen_id->res.kern_name);
2374 if (IS_ERR(new_cm_id)) {
2375 ret = -ENOMEM;
2376 goto out;
2377 }
2378 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
2379 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
2380 conn_id->state = RDMA_CM_CONNECT;
2381
2382 ret = rdma_translate_ip(laddr, &conn_id->id.route.addr.dev_addr);
2383 if (ret) {
2384 mutex_unlock(&listen_id->handler_mutex);
2385 destroy_id_handler_unlock(conn_id);
2386 return ret;
2387 }
2388
2389 ret = cma_iw_acquire_dev(conn_id, listen_id);
2390 if (ret) {
2391 mutex_unlock(&listen_id->handler_mutex);
2392 destroy_id_handler_unlock(conn_id);
2393 return ret;
2394 }
2395
2396 conn_id->cm_id.iw = cm_id;
2397 cm_id->context = conn_id;
2398 cm_id->cm_handler = cma_iw_handler;
2399
2400 memcpy(cma_src_addr(conn_id), laddr, rdma_addr_size(laddr));
2401 memcpy(cma_dst_addr(conn_id), raddr, rdma_addr_size(raddr));
2402
2403 ret = cma_cm_event_handler(conn_id, &event);
2404 if (ret) {
2405
2406 conn_id->cm_id.iw = NULL;
2407 mutex_unlock(&listen_id->handler_mutex);
2408 destroy_id_handler_unlock(conn_id);
2409 return ret;
2410 }
2411
2412 mutex_unlock(&conn_id->handler_mutex);
2413
2414out:
2415 mutex_unlock(&listen_id->handler_mutex);
2416 return ret;
2417}
2418
2419static int cma_ib_listen(struct rdma_id_private *id_priv)
2420{
2421 struct sockaddr *addr;
2422 struct ib_cm_id *id;
2423 __be64 svc_id;
2424
2425 addr = cma_src_addr(id_priv);
2426 svc_id = rdma_get_service_id(&id_priv->id, addr);
2427 id = ib_cm_insert_listen(id_priv->id.device,
2428 cma_ib_req_handler, svc_id);
2429 if (IS_ERR(id))
2430 return PTR_ERR(id);
2431 id_priv->cm_id.ib = id;
2432
2433 return 0;
2434}
2435
2436static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
2437{
2438 int ret;
2439 struct iw_cm_id *id;
2440
2441 id = iw_create_cm_id(id_priv->id.device,
2442 iw_conn_req_handler,
2443 id_priv);
2444 if (IS_ERR(id))
2445 return PTR_ERR(id);
2446
2447 id->tos = id_priv->tos;
2448 id->tos_set = id_priv->tos_set;
2449 id_priv->cm_id.iw = id;
2450
2451 memcpy(&id_priv->cm_id.iw->local_addr, cma_src_addr(id_priv),
2452 rdma_addr_size(cma_src_addr(id_priv)));
2453
2454 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
2455
2456 if (ret) {
2457 iw_destroy_cm_id(id_priv->cm_id.iw);
2458 id_priv->cm_id.iw = NULL;
2459 }
2460
2461 return ret;
2462}
2463
2464static int cma_listen_handler(struct rdma_cm_id *id,
2465 struct rdma_cm_event *event)
2466{
2467 struct rdma_id_private *id_priv = id->context;
2468
2469
2470 if (event->event == RDMA_CM_EVENT_DEVICE_REMOVAL)
2471 return -1;
2472
2473 id->context = id_priv->id.context;
2474 id->event_handler = id_priv->id.event_handler;
2475 trace_cm_event_handler(id_priv, event);
2476 return id_priv->id.event_handler(id, event);
2477}
2478
2479static void cma_listen_on_dev(struct rdma_id_private *id_priv,
2480 struct cma_device *cma_dev)
2481{
2482 struct rdma_id_private *dev_id_priv;
2483 struct rdma_cm_id *id;
2484 struct net *net = id_priv->id.route.addr.dev_addr.net;
2485 int ret;
2486
2487 lockdep_assert_held(&lock);
2488
2489 if (cma_family(id_priv) == AF_IB && !rdma_cap_ib_cm(cma_dev->device, 1))
2490 return;
2491
2492 id = __rdma_create_id(net, cma_listen_handler, id_priv, id_priv->id.ps,
2493 id_priv->id.qp_type, id_priv->res.kern_name);
2494 if (IS_ERR(id))
2495 return;
2496
2497 dev_id_priv = container_of(id, struct rdma_id_private, id);
2498
2499 dev_id_priv->state = RDMA_CM_ADDR_BOUND;
2500 memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv),
2501 rdma_addr_size(cma_src_addr(id_priv)));
2502
2503 _cma_attach_to_dev(dev_id_priv, cma_dev);
2504 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
2505 cma_id_get(id_priv);
2506 dev_id_priv->internal_id = 1;
2507 dev_id_priv->afonly = id_priv->afonly;
2508 dev_id_priv->tos_set = id_priv->tos_set;
2509 dev_id_priv->tos = id_priv->tos;
2510
2511 ret = rdma_listen(id, id_priv->backlog);
2512 if (ret)
2513 dev_warn(&cma_dev->device->dev,
2514 "RDMA CMA: cma_listen_on_dev, error %d\n", ret);
2515}
2516
2517static void cma_listen_on_all(struct rdma_id_private *id_priv)
2518{
2519 struct cma_device *cma_dev;
2520
2521 mutex_lock(&lock);
2522 list_add_tail(&id_priv->list, &listen_any_list);
2523 list_for_each_entry(cma_dev, &dev_list, list)
2524 cma_listen_on_dev(id_priv, cma_dev);
2525 mutex_unlock(&lock);
2526}
2527
2528void rdma_set_service_type(struct rdma_cm_id *id, int tos)
2529{
2530 struct rdma_id_private *id_priv;
2531
2532 id_priv = container_of(id, struct rdma_id_private, id);
2533 id_priv->tos = (u8) tos;
2534 id_priv->tos_set = true;
2535}
2536EXPORT_SYMBOL(rdma_set_service_type);
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553int rdma_set_ack_timeout(struct rdma_cm_id *id, u8 timeout)
2554{
2555 struct rdma_id_private *id_priv;
2556
2557 if (id->qp_type != IB_QPT_RC)
2558 return -EINVAL;
2559
2560 id_priv = container_of(id, struct rdma_id_private, id);
2561 id_priv->timeout = timeout;
2562 id_priv->timeout_set = true;
2563
2564 return 0;
2565}
2566EXPORT_SYMBOL(rdma_set_ack_timeout);
2567
2568static void cma_query_handler(int status, struct sa_path_rec *path_rec,
2569 void *context)
2570{
2571 struct cma_work *work = context;
2572 struct rdma_route *route;
2573
2574 route = &work->id->id.route;
2575
2576 if (!status) {
2577 route->num_paths = 1;
2578 *route->path_rec = *path_rec;
2579 } else {
2580 work->old_state = RDMA_CM_ROUTE_QUERY;
2581 work->new_state = RDMA_CM_ADDR_RESOLVED;
2582 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
2583 work->event.status = status;
2584 pr_debug_ratelimited("RDMA CM: ROUTE_ERROR: failed to query path. status %d\n",
2585 status);
2586 }
2587
2588 queue_work(cma_wq, &work->work);
2589}
2590
2591static int cma_query_ib_route(struct rdma_id_private *id_priv,
2592 unsigned long timeout_ms, struct cma_work *work)
2593{
2594 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2595 struct sa_path_rec path_rec;
2596 ib_sa_comp_mask comp_mask;
2597 struct sockaddr_in6 *sin6;
2598 struct sockaddr_ib *sib;
2599
2600 memset(&path_rec, 0, sizeof path_rec);
2601
2602 if (rdma_cap_opa_ah(id_priv->id.device, id_priv->id.port_num))
2603 path_rec.rec_type = SA_PATH_REC_TYPE_OPA;
2604 else
2605 path_rec.rec_type = SA_PATH_REC_TYPE_IB;
2606 rdma_addr_get_sgid(dev_addr, &path_rec.sgid);
2607 rdma_addr_get_dgid(dev_addr, &path_rec.dgid);
2608 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
2609 path_rec.numb_path = 1;
2610 path_rec.reversible = 1;
2611 path_rec.service_id = rdma_get_service_id(&id_priv->id,
2612 cma_dst_addr(id_priv));
2613
2614 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
2615 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
2616 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
2617
2618 switch (cma_family(id_priv)) {
2619 case AF_INET:
2620 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
2621 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
2622 break;
2623 case AF_INET6:
2624 sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
2625 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
2626 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2627 break;
2628 case AF_IB:
2629 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
2630 path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20);
2631 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2632 break;
2633 }
2634
2635 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
2636 id_priv->id.port_num, &path_rec,
2637 comp_mask, timeout_ms,
2638 GFP_KERNEL, cma_query_handler,
2639 work, &id_priv->query);
2640
2641 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
2642}
2643
2644static void cma_work_handler(struct work_struct *_work)
2645{
2646 struct cma_work *work = container_of(_work, struct cma_work, work);
2647 struct rdma_id_private *id_priv = work->id;
2648
2649 mutex_lock(&id_priv->handler_mutex);
2650 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
2651 goto out_unlock;
2652
2653 if (cma_cm_event_handler(id_priv, &work->event)) {
2654 cma_id_put(id_priv);
2655 destroy_id_handler_unlock(id_priv);
2656 goto out_free;
2657 }
2658
2659out_unlock:
2660 mutex_unlock(&id_priv->handler_mutex);
2661 cma_id_put(id_priv);
2662out_free:
2663 kfree(work);
2664}
2665
2666static void cma_ndev_work_handler(struct work_struct *_work)
2667{
2668 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
2669 struct rdma_id_private *id_priv = work->id;
2670
2671 mutex_lock(&id_priv->handler_mutex);
2672 if (id_priv->state == RDMA_CM_DESTROYING ||
2673 id_priv->state == RDMA_CM_DEVICE_REMOVAL)
2674 goto out_unlock;
2675
2676 if (cma_cm_event_handler(id_priv, &work->event)) {
2677 cma_id_put(id_priv);
2678 destroy_id_handler_unlock(id_priv);
2679 goto out_free;
2680 }
2681
2682out_unlock:
2683 mutex_unlock(&id_priv->handler_mutex);
2684 cma_id_put(id_priv);
2685out_free:
2686 kfree(work);
2687}
2688
2689static void cma_init_resolve_route_work(struct cma_work *work,
2690 struct rdma_id_private *id_priv)
2691{
2692 work->id = id_priv;
2693 INIT_WORK(&work->work, cma_work_handler);
2694 work->old_state = RDMA_CM_ROUTE_QUERY;
2695 work->new_state = RDMA_CM_ROUTE_RESOLVED;
2696 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2697}
2698
2699static void enqueue_resolve_addr_work(struct cma_work *work,
2700 struct rdma_id_private *id_priv)
2701{
2702
2703 cma_id_get(id_priv);
2704
2705 work->id = id_priv;
2706 INIT_WORK(&work->work, cma_work_handler);
2707 work->old_state = RDMA_CM_ADDR_QUERY;
2708 work->new_state = RDMA_CM_ADDR_RESOLVED;
2709 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2710
2711 queue_work(cma_wq, &work->work);
2712}
2713
2714static int cma_resolve_ib_route(struct rdma_id_private *id_priv,
2715 unsigned long timeout_ms)
2716{
2717 struct rdma_route *route = &id_priv->id.route;
2718 struct cma_work *work;
2719 int ret;
2720
2721 work = kzalloc(sizeof *work, GFP_KERNEL);
2722 if (!work)
2723 return -ENOMEM;
2724
2725 cma_init_resolve_route_work(work, id_priv);
2726
2727 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
2728 if (!route->path_rec) {
2729 ret = -ENOMEM;
2730 goto err1;
2731 }
2732
2733 ret = cma_query_ib_route(id_priv, timeout_ms, work);
2734 if (ret)
2735 goto err2;
2736
2737 return 0;
2738err2:
2739 kfree(route->path_rec);
2740 route->path_rec = NULL;
2741err1:
2742 kfree(work);
2743 return ret;
2744}
2745
2746static enum ib_gid_type cma_route_gid_type(enum rdma_network_type network_type,
2747 unsigned long supported_gids,
2748 enum ib_gid_type default_gid)
2749{
2750 if ((network_type == RDMA_NETWORK_IPV4 ||
2751 network_type == RDMA_NETWORK_IPV6) &&
2752 test_bit(IB_GID_TYPE_ROCE_UDP_ENCAP, &supported_gids))
2753 return IB_GID_TYPE_ROCE_UDP_ENCAP;
2754
2755 return default_gid;
2756}
2757
2758
2759
2760
2761
2762
2763
2764
2765static struct net_device *
2766cma_iboe_set_path_rec_l2_fields(struct rdma_id_private *id_priv)
2767{
2768 struct rdma_route *route = &id_priv->id.route;
2769 enum ib_gid_type gid_type = IB_GID_TYPE_ROCE;
2770 struct rdma_addr *addr = &route->addr;
2771 unsigned long supported_gids;
2772 struct net_device *ndev;
2773
2774 if (!addr->dev_addr.bound_dev_if)
2775 return NULL;
2776
2777 ndev = dev_get_by_index(addr->dev_addr.net,
2778 addr->dev_addr.bound_dev_if);
2779 if (!ndev)
2780 return NULL;
2781
2782 supported_gids = roce_gid_type_mask_support(id_priv->id.device,
2783 id_priv->id.port_num);
2784 gid_type = cma_route_gid_type(addr->dev_addr.network,
2785 supported_gids,
2786 id_priv->gid_type);
2787
2788 if (gid_type < ib_network_to_gid_type(addr->dev_addr.network))
2789 gid_type = ib_network_to_gid_type(addr->dev_addr.network);
2790 route->path_rec->rec_type = sa_conv_gid_to_pathrec_type(gid_type);
2791
2792 route->path_rec->roce.route_resolved = true;
2793 sa_path_set_dmac(route->path_rec, addr->dev_addr.dst_dev_addr);
2794 return ndev;
2795}
2796
2797int rdma_set_ib_path(struct rdma_cm_id *id,
2798 struct sa_path_rec *path_rec)
2799{
2800 struct rdma_id_private *id_priv;
2801 struct net_device *ndev;
2802 int ret;
2803
2804 id_priv = container_of(id, struct rdma_id_private, id);
2805 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2806 RDMA_CM_ROUTE_RESOLVED))
2807 return -EINVAL;
2808
2809 id->route.path_rec = kmemdup(path_rec, sizeof(*path_rec),
2810 GFP_KERNEL);
2811 if (!id->route.path_rec) {
2812 ret = -ENOMEM;
2813 goto err;
2814 }
2815
2816 if (rdma_protocol_roce(id->device, id->port_num)) {
2817 ndev = cma_iboe_set_path_rec_l2_fields(id_priv);
2818 if (!ndev) {
2819 ret = -ENODEV;
2820 goto err_free;
2821 }
2822 dev_put(ndev);
2823 }
2824
2825 id->route.num_paths = 1;
2826 return 0;
2827
2828err_free:
2829 kfree(id->route.path_rec);
2830 id->route.path_rec = NULL;
2831err:
2832 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
2833 return ret;
2834}
2835EXPORT_SYMBOL(rdma_set_ib_path);
2836
2837static int cma_resolve_iw_route(struct rdma_id_private *id_priv)
2838{
2839 struct cma_work *work;
2840
2841 work = kzalloc(sizeof *work, GFP_KERNEL);
2842 if (!work)
2843 return -ENOMEM;
2844
2845 cma_init_resolve_route_work(work, id_priv);
2846 queue_work(cma_wq, &work->work);
2847 return 0;
2848}
2849
2850static int get_vlan_ndev_tc(struct net_device *vlan_ndev, int prio)
2851{
2852 struct net_device *dev;
2853
2854 dev = vlan_dev_real_dev(vlan_ndev);
2855 if (dev->num_tc)
2856 return netdev_get_prio_tc_map(dev, prio);
2857
2858 return (vlan_dev_get_egress_qos_mask(vlan_ndev, prio) &
2859 VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
2860}
2861
2862struct iboe_prio_tc_map {
2863 int input_prio;
2864 int output_tc;
2865 bool found;
2866};
2867
2868static int get_lower_vlan_dev_tc(struct net_device *dev,
2869 struct netdev_nested_priv *priv)
2870{
2871 struct iboe_prio_tc_map *map = (struct iboe_prio_tc_map *)priv->data;
2872
2873 if (is_vlan_dev(dev))
2874 map->output_tc = get_vlan_ndev_tc(dev, map->input_prio);
2875 else if (dev->num_tc)
2876 map->output_tc = netdev_get_prio_tc_map(dev, map->input_prio);
2877 else
2878 map->output_tc = 0;
2879
2880
2881
2882 map->found = true;
2883 return 1;
2884}
2885
2886static int iboe_tos_to_sl(struct net_device *ndev, int tos)
2887{
2888 struct iboe_prio_tc_map prio_tc_map = {};
2889 int prio = rt_tos2priority(tos);
2890 struct netdev_nested_priv priv;
2891
2892
2893 if (is_vlan_dev(ndev))
2894 return get_vlan_ndev_tc(ndev, prio);
2895
2896 prio_tc_map.input_prio = prio;
2897 priv.data = (void *)&prio_tc_map;
2898 rcu_read_lock();
2899 netdev_walk_all_lower_dev_rcu(ndev,
2900 get_lower_vlan_dev_tc,
2901 &priv);
2902 rcu_read_unlock();
2903
2904
2905
2906 if (prio_tc_map.found)
2907 return prio_tc_map.output_tc;
2908 else if (ndev->num_tc)
2909 return netdev_get_prio_tc_map(ndev, prio);
2910 else
2911 return 0;
2912}
2913
2914static __be32 cma_get_roce_udp_flow_label(struct rdma_id_private *id_priv)
2915{
2916 struct sockaddr_in6 *addr6;
2917 u16 dport, sport;
2918 u32 hash, fl;
2919
2920 addr6 = (struct sockaddr_in6 *)cma_src_addr(id_priv);
2921 fl = be32_to_cpu(addr6->sin6_flowinfo) & IB_GRH_FLOWLABEL_MASK;
2922 if ((cma_family(id_priv) != AF_INET6) || !fl) {
2923 dport = be16_to_cpu(cma_port(cma_dst_addr(id_priv)));
2924 sport = be16_to_cpu(cma_port(cma_src_addr(id_priv)));
2925 hash = (u32)sport * 31 + dport;
2926 fl = hash & IB_GRH_FLOWLABEL_MASK;
2927 }
2928
2929 return cpu_to_be32(fl);
2930}
2931
2932static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
2933{
2934 struct rdma_route *route = &id_priv->id.route;
2935 struct rdma_addr *addr = &route->addr;
2936 struct cma_work *work;
2937 int ret;
2938 struct net_device *ndev;
2939
2940 u8 default_roce_tos = id_priv->cma_dev->default_roce_tos[id_priv->id.port_num -
2941 rdma_start_port(id_priv->cma_dev->device)];
2942 u8 tos = id_priv->tos_set ? id_priv->tos : default_roce_tos;
2943
2944
2945 work = kzalloc(sizeof *work, GFP_KERNEL);
2946 if (!work)
2947 return -ENOMEM;
2948
2949 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
2950 if (!route->path_rec) {
2951 ret = -ENOMEM;
2952 goto err1;
2953 }
2954
2955 route->num_paths = 1;
2956
2957 ndev = cma_iboe_set_path_rec_l2_fields(id_priv);
2958 if (!ndev) {
2959 ret = -ENODEV;
2960 goto err2;
2961 }
2962
2963 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
2964 &route->path_rec->sgid);
2965 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.dst_addr,
2966 &route->path_rec->dgid);
2967
2968 if (((struct sockaddr *)&id_priv->id.route.addr.dst_addr)->sa_family != AF_IB)
2969
2970 route->path_rec->hop_limit = addr->dev_addr.hoplimit;
2971 else
2972 route->path_rec->hop_limit = 1;
2973 route->path_rec->reversible = 1;
2974 route->path_rec->pkey = cpu_to_be16(0xffff);
2975 route->path_rec->mtu_selector = IB_SA_EQ;
2976 route->path_rec->sl = iboe_tos_to_sl(ndev, tos);
2977 route->path_rec->traffic_class = tos;
2978 route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
2979 route->path_rec->rate_selector = IB_SA_EQ;
2980 route->path_rec->rate = iboe_get_rate(ndev);
2981 dev_put(ndev);
2982 route->path_rec->packet_life_time_selector = IB_SA_EQ;
2983
2984
2985
2986
2987
2988
2989
2990 route->path_rec->packet_life_time = id_priv->timeout_set ?
2991 id_priv->timeout - 1 : CMA_IBOE_PACKET_LIFETIME;
2992
2993 if (!route->path_rec->mtu) {
2994 ret = -EINVAL;
2995 goto err2;
2996 }
2997
2998 if (rdma_protocol_roce_udp_encap(id_priv->id.device,
2999 id_priv->id.port_num))
3000 route->path_rec->flow_label =
3001 cma_get_roce_udp_flow_label(id_priv);
3002
3003 cma_init_resolve_route_work(work, id_priv);
3004 queue_work(cma_wq, &work->work);
3005
3006 return 0;
3007
3008err2:
3009 kfree(route->path_rec);
3010 route->path_rec = NULL;
3011 route->num_paths = 0;
3012err1:
3013 kfree(work);
3014 return ret;
3015}
3016
3017int rdma_resolve_route(struct rdma_cm_id *id, unsigned long timeout_ms)
3018{
3019 struct rdma_id_private *id_priv;
3020 int ret;
3021
3022 id_priv = container_of(id, struct rdma_id_private, id);
3023 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
3024 return -EINVAL;
3025
3026 cma_id_get(id_priv);
3027 if (rdma_cap_ib_sa(id->device, id->port_num))
3028 ret = cma_resolve_ib_route(id_priv, timeout_ms);
3029 else if (rdma_protocol_roce(id->device, id->port_num))
3030 ret = cma_resolve_iboe_route(id_priv);
3031 else if (rdma_protocol_iwarp(id->device, id->port_num))
3032 ret = cma_resolve_iw_route(id_priv);
3033 else
3034 ret = -ENOSYS;
3035
3036 if (ret)
3037 goto err;
3038
3039 return 0;
3040err:
3041 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
3042 cma_id_put(id_priv);
3043 return ret;
3044}
3045EXPORT_SYMBOL(rdma_resolve_route);
3046
3047static void cma_set_loopback(struct sockaddr *addr)
3048{
3049 switch (addr->sa_family) {
3050 case AF_INET:
3051 ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
3052 break;
3053 case AF_INET6:
3054 ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr,
3055 0, 0, 0, htonl(1));
3056 break;
3057 default:
3058 ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr,
3059 0, 0, 0, htonl(1));
3060 break;
3061 }
3062}
3063
3064static int cma_bind_loopback(struct rdma_id_private *id_priv)
3065{
3066 struct cma_device *cma_dev, *cur_dev;
3067 union ib_gid gid;
3068 enum ib_port_state port_state;
3069 unsigned int p;
3070 u16 pkey;
3071 int ret;
3072
3073 cma_dev = NULL;
3074 mutex_lock(&lock);
3075 list_for_each_entry(cur_dev, &dev_list, list) {
3076 if (cma_family(id_priv) == AF_IB &&
3077 !rdma_cap_ib_cm(cur_dev->device, 1))
3078 continue;
3079
3080 if (!cma_dev)
3081 cma_dev = cur_dev;
3082
3083 rdma_for_each_port (cur_dev->device, p) {
3084 if (!ib_get_cached_port_state(cur_dev->device, p, &port_state) &&
3085 port_state == IB_PORT_ACTIVE) {
3086 cma_dev = cur_dev;
3087 goto port_found;
3088 }
3089 }
3090 }
3091
3092 if (!cma_dev) {
3093 ret = -ENODEV;
3094 goto out;
3095 }
3096
3097 p = 1;
3098
3099port_found:
3100 ret = rdma_query_gid(cma_dev->device, p, 0, &gid);
3101 if (ret)
3102 goto out;
3103
3104 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
3105 if (ret)
3106 goto out;
3107
3108 id_priv->id.route.addr.dev_addr.dev_type =
3109 (rdma_protocol_ib(cma_dev->device, p)) ?
3110 ARPHRD_INFINIBAND : ARPHRD_ETHER;
3111
3112 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
3113 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
3114 id_priv->id.port_num = p;
3115 cma_attach_to_dev(id_priv, cma_dev);
3116 cma_set_loopback(cma_src_addr(id_priv));
3117out:
3118 mutex_unlock(&lock);
3119 return ret;
3120}
3121
3122static void addr_handler(int status, struct sockaddr *src_addr,
3123 struct rdma_dev_addr *dev_addr, void *context)
3124{
3125 struct rdma_id_private *id_priv = context;
3126 struct rdma_cm_event event = {};
3127 struct sockaddr *addr;
3128 struct sockaddr_storage old_addr;
3129
3130 mutex_lock(&id_priv->handler_mutex);
3131 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
3132 RDMA_CM_ADDR_RESOLVED))
3133 goto out;
3134
3135
3136
3137
3138
3139
3140 addr = cma_src_addr(id_priv);
3141 memcpy(&old_addr, addr, rdma_addr_size(addr));
3142 memcpy(addr, src_addr, rdma_addr_size(src_addr));
3143 if (!status && !id_priv->cma_dev) {
3144 status = cma_acquire_dev_by_src_ip(id_priv);
3145 if (status)
3146 pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to acquire device. status %d\n",
3147 status);
3148 } else if (status) {
3149 pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to resolve IP. status %d\n", status);
3150 }
3151
3152 if (status) {
3153 memcpy(addr, &old_addr,
3154 rdma_addr_size((struct sockaddr *)&old_addr));
3155 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
3156 RDMA_CM_ADDR_BOUND))
3157 goto out;
3158 event.event = RDMA_CM_EVENT_ADDR_ERROR;
3159 event.status = status;
3160 } else
3161 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
3162
3163 if (cma_cm_event_handler(id_priv, &event)) {
3164 destroy_id_handler_unlock(id_priv);
3165 return;
3166 }
3167out:
3168 mutex_unlock(&id_priv->handler_mutex);
3169}
3170
3171static int cma_resolve_loopback(struct rdma_id_private *id_priv)
3172{
3173 struct cma_work *work;
3174 union ib_gid gid;
3175 int ret;
3176
3177 work = kzalloc(sizeof *work, GFP_KERNEL);
3178 if (!work)
3179 return -ENOMEM;
3180
3181 if (!id_priv->cma_dev) {
3182 ret = cma_bind_loopback(id_priv);
3183 if (ret)
3184 goto err;
3185 }
3186
3187 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
3188 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
3189
3190 enqueue_resolve_addr_work(work, id_priv);
3191 return 0;
3192err:
3193 kfree(work);
3194 return ret;
3195}
3196
3197static int cma_resolve_ib_addr(struct rdma_id_private *id_priv)
3198{
3199 struct cma_work *work;
3200 int ret;
3201
3202 work = kzalloc(sizeof *work, GFP_KERNEL);
3203 if (!work)
3204 return -ENOMEM;
3205
3206 if (!id_priv->cma_dev) {
3207 ret = cma_resolve_ib_dev(id_priv);
3208 if (ret)
3209 goto err;
3210 }
3211
3212 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *)
3213 &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr));
3214
3215 enqueue_resolve_addr_work(work, id_priv);
3216 return 0;
3217err:
3218 kfree(work);
3219 return ret;
3220}
3221
3222static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
3223 const struct sockaddr *dst_addr)
3224{
3225 if (!src_addr || !src_addr->sa_family) {
3226 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
3227 src_addr->sa_family = dst_addr->sa_family;
3228 if (IS_ENABLED(CONFIG_IPV6) &&
3229 dst_addr->sa_family == AF_INET6) {
3230 struct sockaddr_in6 *src_addr6 = (struct sockaddr_in6 *) src_addr;
3231 struct sockaddr_in6 *dst_addr6 = (struct sockaddr_in6 *) dst_addr;
3232 src_addr6->sin6_scope_id = dst_addr6->sin6_scope_id;
3233 if (ipv6_addr_type(&dst_addr6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
3234 id->route.addr.dev_addr.bound_dev_if = dst_addr6->sin6_scope_id;
3235 } else if (dst_addr->sa_family == AF_IB) {
3236 ((struct sockaddr_ib *) src_addr)->sib_pkey =
3237 ((struct sockaddr_ib *) dst_addr)->sib_pkey;
3238 }
3239 }
3240 return rdma_bind_addr(id, src_addr);
3241}
3242
3243int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
3244 const struct sockaddr *dst_addr, unsigned long timeout_ms)
3245{
3246 struct rdma_id_private *id_priv;
3247 int ret;
3248
3249 id_priv = container_of(id, struct rdma_id_private, id);
3250 memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr));
3251 if (id_priv->state == RDMA_CM_IDLE) {
3252 ret = cma_bind_addr(id, src_addr, dst_addr);
3253 if (ret) {
3254 memset(cma_dst_addr(id_priv), 0,
3255 rdma_addr_size(dst_addr));
3256 return ret;
3257 }
3258 }
3259
3260 if (cma_family(id_priv) != dst_addr->sa_family) {
3261 memset(cma_dst_addr(id_priv), 0, rdma_addr_size(dst_addr));
3262 return -EINVAL;
3263 }
3264
3265 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY)) {
3266 memset(cma_dst_addr(id_priv), 0, rdma_addr_size(dst_addr));
3267 return -EINVAL;
3268 }
3269
3270 if (cma_any_addr(dst_addr)) {
3271 ret = cma_resolve_loopback(id_priv);
3272 } else {
3273 if (dst_addr->sa_family == AF_IB) {
3274 ret = cma_resolve_ib_addr(id_priv);
3275 } else {
3276 ret = rdma_resolve_ip(cma_src_addr(id_priv), dst_addr,
3277 &id->route.addr.dev_addr,
3278 timeout_ms, addr_handler,
3279 false, id_priv);
3280 }
3281 }
3282 if (ret)
3283 goto err;
3284
3285 return 0;
3286err:
3287 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
3288 return ret;
3289}
3290EXPORT_SYMBOL(rdma_resolve_addr);
3291
3292int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
3293{
3294 struct rdma_id_private *id_priv;
3295 unsigned long flags;
3296 int ret;
3297
3298 id_priv = container_of(id, struct rdma_id_private, id);
3299 spin_lock_irqsave(&id_priv->lock, flags);
3300 if (reuse || id_priv->state == RDMA_CM_IDLE) {
3301 id_priv->reuseaddr = reuse;
3302 ret = 0;
3303 } else {
3304 ret = -EINVAL;
3305 }
3306 spin_unlock_irqrestore(&id_priv->lock, flags);
3307 return ret;
3308}
3309EXPORT_SYMBOL(rdma_set_reuseaddr);
3310
3311int rdma_set_afonly(struct rdma_cm_id *id, int afonly)
3312{
3313 struct rdma_id_private *id_priv;
3314 unsigned long flags;
3315 int ret;
3316
3317 id_priv = container_of(id, struct rdma_id_private, id);
3318 spin_lock_irqsave(&id_priv->lock, flags);
3319 if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) {
3320 id_priv->options |= (1 << CMA_OPTION_AFONLY);
3321 id_priv->afonly = afonly;
3322 ret = 0;
3323 } else {
3324 ret = -EINVAL;
3325 }
3326 spin_unlock_irqrestore(&id_priv->lock, flags);
3327 return ret;
3328}
3329EXPORT_SYMBOL(rdma_set_afonly);
3330
3331static void cma_bind_port(struct rdma_bind_list *bind_list,
3332 struct rdma_id_private *id_priv)
3333{
3334 struct sockaddr *addr;
3335 struct sockaddr_ib *sib;
3336 u64 sid, mask;
3337 __be16 port;
3338
3339 lockdep_assert_held(&lock);
3340
3341 addr = cma_src_addr(id_priv);
3342 port = htons(bind_list->port);
3343
3344 switch (addr->sa_family) {
3345 case AF_INET:
3346 ((struct sockaddr_in *) addr)->sin_port = port;
3347 break;
3348 case AF_INET6:
3349 ((struct sockaddr_in6 *) addr)->sin6_port = port;
3350 break;
3351 case AF_IB:
3352 sib = (struct sockaddr_ib *) addr;
3353 sid = be64_to_cpu(sib->sib_sid);
3354 mask = be64_to_cpu(sib->sib_sid_mask);
3355 sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port));
3356 sib->sib_sid_mask = cpu_to_be64(~0ULL);
3357 break;
3358 }
3359 id_priv->bind_list = bind_list;
3360 hlist_add_head(&id_priv->node, &bind_list->owners);
3361}
3362
3363static int cma_alloc_port(enum rdma_ucm_port_space ps,
3364 struct rdma_id_private *id_priv, unsigned short snum)
3365{
3366 struct rdma_bind_list *bind_list;
3367 int ret;
3368
3369 lockdep_assert_held(&lock);
3370
3371 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
3372 if (!bind_list)
3373 return -ENOMEM;
3374
3375 ret = cma_ps_alloc(id_priv->id.route.addr.dev_addr.net, ps, bind_list,
3376 snum);
3377 if (ret < 0)
3378 goto err;
3379
3380 bind_list->ps = ps;
3381 bind_list->port = snum;
3382 cma_bind_port(bind_list, id_priv);
3383 return 0;
3384err:
3385 kfree(bind_list);
3386 return ret == -ENOSPC ? -EADDRNOTAVAIL : ret;
3387}
3388
3389static int cma_port_is_unique(struct rdma_bind_list *bind_list,
3390 struct rdma_id_private *id_priv)
3391{
3392 struct rdma_id_private *cur_id;
3393 struct sockaddr *daddr = cma_dst_addr(id_priv);
3394 struct sockaddr *saddr = cma_src_addr(id_priv);
3395 __be16 dport = cma_port(daddr);
3396
3397 lockdep_assert_held(&lock);
3398
3399 hlist_for_each_entry(cur_id, &bind_list->owners, node) {
3400 struct sockaddr *cur_daddr = cma_dst_addr(cur_id);
3401 struct sockaddr *cur_saddr = cma_src_addr(cur_id);
3402 __be16 cur_dport = cma_port(cur_daddr);
3403
3404 if (id_priv == cur_id)
3405 continue;
3406
3407
3408 if (!cma_any_port(daddr) &&
3409 !cma_any_port(cur_daddr) &&
3410 (dport != cur_dport))
3411 continue;
3412
3413
3414 if (!cma_any_addr(saddr) &&
3415 !cma_any_addr(cur_saddr) &&
3416 cma_addr_cmp(saddr, cur_saddr))
3417 continue;
3418
3419
3420 if (!cma_any_addr(daddr) &&
3421 !cma_any_addr(cur_daddr) &&
3422 cma_addr_cmp(daddr, cur_daddr))
3423 continue;
3424
3425 return -EADDRNOTAVAIL;
3426 }
3427 return 0;
3428}
3429
3430static int cma_alloc_any_port(enum rdma_ucm_port_space ps,
3431 struct rdma_id_private *id_priv)
3432{
3433 static unsigned int last_used_port;
3434 int low, high, remaining;
3435 unsigned int rover;
3436 struct net *net = id_priv->id.route.addr.dev_addr.net;
3437
3438 lockdep_assert_held(&lock);
3439
3440 inet_get_local_port_range(net, &low, &high);
3441 remaining = (high - low) + 1;
3442 rover = prandom_u32() % remaining + low;
3443retry:
3444 if (last_used_port != rover) {
3445 struct rdma_bind_list *bind_list;
3446 int ret;
3447
3448 bind_list = cma_ps_find(net, ps, (unsigned short)rover);
3449
3450 if (!bind_list) {
3451 ret = cma_alloc_port(ps, id_priv, rover);
3452 } else {
3453 ret = cma_port_is_unique(bind_list, id_priv);
3454 if (!ret)
3455 cma_bind_port(bind_list, id_priv);
3456 }
3457
3458
3459
3460
3461 if (!ret)
3462 last_used_port = rover;
3463 if (ret != -EADDRNOTAVAIL)
3464 return ret;
3465 }
3466 if (--remaining) {
3467 rover++;
3468 if ((rover < low) || (rover > high))
3469 rover = low;
3470 goto retry;
3471 }
3472 return -EADDRNOTAVAIL;
3473}
3474
3475
3476
3477
3478
3479
3480
3481static int cma_check_port(struct rdma_bind_list *bind_list,
3482 struct rdma_id_private *id_priv, uint8_t reuseaddr)
3483{
3484 struct rdma_id_private *cur_id;
3485 struct sockaddr *addr, *cur_addr;
3486
3487 lockdep_assert_held(&lock);
3488
3489 addr = cma_src_addr(id_priv);
3490 hlist_for_each_entry(cur_id, &bind_list->owners, node) {
3491 if (id_priv == cur_id)
3492 continue;
3493
3494 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr &&
3495 cur_id->reuseaddr)
3496 continue;
3497
3498 cur_addr = cma_src_addr(cur_id);
3499 if (id_priv->afonly && cur_id->afonly &&
3500 (addr->sa_family != cur_addr->sa_family))
3501 continue;
3502
3503 if (cma_any_addr(addr) || cma_any_addr(cur_addr))
3504 return -EADDRNOTAVAIL;
3505
3506 if (!cma_addr_cmp(addr, cur_addr))
3507 return -EADDRINUSE;
3508 }
3509 return 0;
3510}
3511
3512static int cma_use_port(enum rdma_ucm_port_space ps,
3513 struct rdma_id_private *id_priv)
3514{
3515 struct rdma_bind_list *bind_list;
3516 unsigned short snum;
3517 int ret;
3518
3519 lockdep_assert_held(&lock);
3520
3521 snum = ntohs(cma_port(cma_src_addr(id_priv)));
3522 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
3523 return -EACCES;
3524
3525 bind_list = cma_ps_find(id_priv->id.route.addr.dev_addr.net, ps, snum);
3526 if (!bind_list) {
3527 ret = cma_alloc_port(ps, id_priv, snum);
3528 } else {
3529 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
3530 if (!ret)
3531 cma_bind_port(bind_list, id_priv);
3532 }
3533 return ret;
3534}
3535
3536static int cma_bind_listen(struct rdma_id_private *id_priv)
3537{
3538 struct rdma_bind_list *bind_list = id_priv->bind_list;
3539 int ret = 0;
3540
3541 mutex_lock(&lock);
3542 if (bind_list->owners.first->next)
3543 ret = cma_check_port(bind_list, id_priv, 0);
3544 mutex_unlock(&lock);
3545 return ret;
3546}
3547
3548static enum rdma_ucm_port_space
3549cma_select_inet_ps(struct rdma_id_private *id_priv)
3550{
3551 switch (id_priv->id.ps) {
3552 case RDMA_PS_TCP:
3553 case RDMA_PS_UDP:
3554 case RDMA_PS_IPOIB:
3555 case RDMA_PS_IB:
3556 return id_priv->id.ps;
3557 default:
3558
3559 return 0;
3560 }
3561}
3562
3563static enum rdma_ucm_port_space
3564cma_select_ib_ps(struct rdma_id_private *id_priv)
3565{
3566 enum rdma_ucm_port_space ps = 0;
3567 struct sockaddr_ib *sib;
3568 u64 sid_ps, mask, sid;
3569
3570 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
3571 mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK;
3572 sid = be64_to_cpu(sib->sib_sid) & mask;
3573
3574 if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) {
3575 sid_ps = RDMA_IB_IP_PS_IB;
3576 ps = RDMA_PS_IB;
3577 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) &&
3578 (sid == (RDMA_IB_IP_PS_TCP & mask))) {
3579 sid_ps = RDMA_IB_IP_PS_TCP;
3580 ps = RDMA_PS_TCP;
3581 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) &&
3582 (sid == (RDMA_IB_IP_PS_UDP & mask))) {
3583 sid_ps = RDMA_IB_IP_PS_UDP;
3584 ps = RDMA_PS_UDP;
3585 }
3586
3587 if (ps) {
3588 sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib)));
3589 sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK |
3590 be64_to_cpu(sib->sib_sid_mask));
3591 }
3592 return ps;
3593}
3594
3595static int cma_get_port(struct rdma_id_private *id_priv)
3596{
3597 enum rdma_ucm_port_space ps;
3598 int ret;
3599
3600 if (cma_family(id_priv) != AF_IB)
3601 ps = cma_select_inet_ps(id_priv);
3602 else
3603 ps = cma_select_ib_ps(id_priv);
3604 if (!ps)
3605 return -EPROTONOSUPPORT;
3606
3607 mutex_lock(&lock);
3608 if (cma_any_port(cma_src_addr(id_priv)))
3609 ret = cma_alloc_any_port(ps, id_priv);
3610 else
3611 ret = cma_use_port(ps, id_priv);
3612 mutex_unlock(&lock);
3613
3614 return ret;
3615}
3616
3617static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
3618 struct sockaddr *addr)
3619{
3620#if IS_ENABLED(CONFIG_IPV6)
3621 struct sockaddr_in6 *sin6;
3622
3623 if (addr->sa_family != AF_INET6)
3624 return 0;
3625
3626 sin6 = (struct sockaddr_in6 *) addr;
3627
3628 if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL))
3629 return 0;
3630
3631 if (!sin6->sin6_scope_id)
3632 return -EINVAL;
3633
3634 dev_addr->bound_dev_if = sin6->sin6_scope_id;
3635#endif
3636 return 0;
3637}
3638
3639int rdma_listen(struct rdma_cm_id *id, int backlog)
3640{
3641 struct rdma_id_private *id_priv;
3642 int ret;
3643
3644 id_priv = container_of(id, struct rdma_id_private, id);
3645 if (id_priv->state == RDMA_CM_IDLE) {
3646 id->route.addr.src_addr.ss_family = AF_INET;
3647 ret = rdma_bind_addr(id, cma_src_addr(id_priv));
3648 if (ret)
3649 return ret;
3650 }
3651
3652 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
3653 return -EINVAL;
3654
3655 if (id_priv->reuseaddr) {
3656 ret = cma_bind_listen(id_priv);
3657 if (ret)
3658 goto err;
3659 }
3660
3661 id_priv->backlog = backlog;
3662 if (id->device) {
3663 if (rdma_cap_ib_cm(id->device, 1)) {
3664 ret = cma_ib_listen(id_priv);
3665 if (ret)
3666 goto err;
3667 } else if (rdma_cap_iw_cm(id->device, 1)) {
3668 ret = cma_iw_listen(id_priv, backlog);
3669 if (ret)
3670 goto err;
3671 } else {
3672 ret = -ENOSYS;
3673 goto err;
3674 }
3675 } else
3676 cma_listen_on_all(id_priv);
3677
3678 return 0;
3679err:
3680 id_priv->backlog = 0;
3681 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
3682 return ret;
3683}
3684EXPORT_SYMBOL(rdma_listen);
3685
3686int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
3687{
3688 struct rdma_id_private *id_priv;
3689 int ret;
3690 struct sockaddr *daddr;
3691
3692 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 &&
3693 addr->sa_family != AF_IB)
3694 return -EAFNOSUPPORT;
3695
3696 id_priv = container_of(id, struct rdma_id_private, id);
3697 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
3698 return -EINVAL;
3699
3700 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
3701 if (ret)
3702 goto err1;
3703
3704 memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr));
3705 if (!cma_any_addr(addr)) {
3706 ret = cma_translate_addr(addr, &id->route.addr.dev_addr);
3707 if (ret)
3708 goto err1;
3709
3710 ret = cma_acquire_dev_by_src_ip(id_priv);
3711 if (ret)
3712 goto err1;
3713 }
3714
3715 if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) {
3716 if (addr->sa_family == AF_INET)
3717 id_priv->afonly = 1;
3718#if IS_ENABLED(CONFIG_IPV6)
3719 else if (addr->sa_family == AF_INET6) {
3720 struct net *net = id_priv->id.route.addr.dev_addr.net;
3721
3722 id_priv->afonly = net->ipv6.sysctl.bindv6only;
3723 }
3724#endif
3725 }
3726 daddr = cma_dst_addr(id_priv);
3727 daddr->sa_family = addr->sa_family;
3728
3729 ret = cma_get_port(id_priv);
3730 if (ret)
3731 goto err2;
3732
3733 return 0;
3734err2:
3735 rdma_restrack_del(&id_priv->res);
3736 if (id_priv->cma_dev)
3737 cma_release_dev(id_priv);
3738err1:
3739 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
3740 return ret;
3741}
3742EXPORT_SYMBOL(rdma_bind_addr);
3743
3744static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv)
3745{
3746 struct cma_hdr *cma_hdr;
3747
3748 cma_hdr = hdr;
3749 cma_hdr->cma_version = CMA_VERSION;
3750 if (cma_family(id_priv) == AF_INET) {
3751 struct sockaddr_in *src4, *dst4;
3752
3753 src4 = (struct sockaddr_in *) cma_src_addr(id_priv);
3754 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv);
3755
3756 cma_set_ip_ver(cma_hdr, 4);
3757 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
3758 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
3759 cma_hdr->port = src4->sin_port;
3760 } else if (cma_family(id_priv) == AF_INET6) {
3761 struct sockaddr_in6 *src6, *dst6;
3762
3763 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
3764 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv);
3765
3766 cma_set_ip_ver(cma_hdr, 6);
3767 cma_hdr->src_addr.ip6 = src6->sin6_addr;
3768 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
3769 cma_hdr->port = src6->sin6_port;
3770 }
3771 return 0;
3772}
3773
3774static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
3775 const struct ib_cm_event *ib_event)
3776{
3777 struct rdma_id_private *id_priv = cm_id->context;
3778 struct rdma_cm_event event = {};
3779 const struct ib_cm_sidr_rep_event_param *rep =
3780 &ib_event->param.sidr_rep_rcvd;
3781 int ret;
3782
3783 mutex_lock(&id_priv->handler_mutex);
3784 if (id_priv->state != RDMA_CM_CONNECT)
3785 goto out;
3786
3787 switch (ib_event->event) {
3788 case IB_CM_SIDR_REQ_ERROR:
3789 event.event = RDMA_CM_EVENT_UNREACHABLE;
3790 event.status = -ETIMEDOUT;
3791 break;
3792 case IB_CM_SIDR_REP_RECEIVED:
3793 event.param.ud.private_data = ib_event->private_data;
3794 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
3795 if (rep->status != IB_SIDR_SUCCESS) {
3796 event.event = RDMA_CM_EVENT_UNREACHABLE;
3797 event.status = ib_event->param.sidr_rep_rcvd.status;
3798 pr_debug_ratelimited("RDMA CM: UNREACHABLE: bad SIDR reply. status %d\n",
3799 event.status);
3800 break;
3801 }
3802 ret = cma_set_qkey(id_priv, rep->qkey);
3803 if (ret) {
3804 pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to set qkey. status %d\n", ret);
3805 event.event = RDMA_CM_EVENT_ADDR_ERROR;
3806 event.status = ret;
3807 break;
3808 }
3809 ib_init_ah_attr_from_path(id_priv->id.device,
3810 id_priv->id.port_num,
3811 id_priv->id.route.path_rec,
3812 &event.param.ud.ah_attr,
3813 rep->sgid_attr);
3814 event.param.ud.qp_num = rep->qpn;
3815 event.param.ud.qkey = rep->qkey;
3816 event.event = RDMA_CM_EVENT_ESTABLISHED;
3817 event.status = 0;
3818 break;
3819 default:
3820 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
3821 ib_event->event);
3822 goto out;
3823 }
3824
3825 ret = cma_cm_event_handler(id_priv, &event);
3826
3827 rdma_destroy_ah_attr(&event.param.ud.ah_attr);
3828 if (ret) {
3829
3830 id_priv->cm_id.ib = NULL;
3831 destroy_id_handler_unlock(id_priv);
3832 return ret;
3833 }
3834out:
3835 mutex_unlock(&id_priv->handler_mutex);
3836 return 0;
3837}
3838
3839static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
3840 struct rdma_conn_param *conn_param)
3841{
3842 struct ib_cm_sidr_req_param req;
3843 struct ib_cm_id *id;
3844 void *private_data;
3845 u8 offset;
3846 int ret;
3847
3848 memset(&req, 0, sizeof req);
3849 offset = cma_user_data_offset(id_priv);
3850 req.private_data_len = offset + conn_param->private_data_len;
3851 if (req.private_data_len < conn_param->private_data_len)
3852 return -EINVAL;
3853
3854 if (req.private_data_len) {
3855 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3856 if (!private_data)
3857 return -ENOMEM;
3858 } else {
3859 private_data = NULL;
3860 }
3861
3862 if (conn_param->private_data && conn_param->private_data_len)
3863 memcpy(private_data + offset, conn_param->private_data,
3864 conn_param->private_data_len);
3865
3866 if (private_data) {
3867 ret = cma_format_hdr(private_data, id_priv);
3868 if (ret)
3869 goto out;
3870 req.private_data = private_data;
3871 }
3872
3873 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
3874 id_priv);
3875 if (IS_ERR(id)) {
3876 ret = PTR_ERR(id);
3877 goto out;
3878 }
3879 id_priv->cm_id.ib = id;
3880
3881 req.path = id_priv->id.route.path_rec;
3882 req.sgid_attr = id_priv->id.route.addr.dev_addr.sgid_attr;
3883 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
3884 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
3885 req.max_cm_retries = CMA_MAX_CM_RETRIES;
3886
3887 trace_cm_send_sidr_req(id_priv);
3888 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
3889 if (ret) {
3890 ib_destroy_cm_id(id_priv->cm_id.ib);
3891 id_priv->cm_id.ib = NULL;
3892 }
3893out:
3894 kfree(private_data);
3895 return ret;
3896}
3897
3898static int cma_connect_ib(struct rdma_id_private *id_priv,
3899 struct rdma_conn_param *conn_param)
3900{
3901 struct ib_cm_req_param req;
3902 struct rdma_route *route;
3903 void *private_data;
3904 struct ib_cm_id *id;
3905 u8 offset;
3906 int ret;
3907
3908 memset(&req, 0, sizeof req);
3909 offset = cma_user_data_offset(id_priv);
3910 req.private_data_len = offset + conn_param->private_data_len;
3911 if (req.private_data_len < conn_param->private_data_len)
3912 return -EINVAL;
3913
3914 if (req.private_data_len) {
3915 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3916 if (!private_data)
3917 return -ENOMEM;
3918 } else {
3919 private_data = NULL;
3920 }
3921
3922 if (conn_param->private_data && conn_param->private_data_len)
3923 memcpy(private_data + offset, conn_param->private_data,
3924 conn_param->private_data_len);
3925
3926 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
3927 if (IS_ERR(id)) {
3928 ret = PTR_ERR(id);
3929 goto out;
3930 }
3931 id_priv->cm_id.ib = id;
3932
3933 route = &id_priv->id.route;
3934 if (private_data) {
3935 ret = cma_format_hdr(private_data, id_priv);
3936 if (ret)
3937 goto out;
3938 req.private_data = private_data;
3939 }
3940
3941 req.primary_path = &route->path_rec[0];
3942 if (route->num_paths == 2)
3943 req.alternate_path = &route->path_rec[1];
3944
3945 req.ppath_sgid_attr = id_priv->id.route.addr.dev_addr.sgid_attr;
3946
3947 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
3948 req.qp_num = id_priv->qp_num;
3949 req.qp_type = id_priv->id.qp_type;
3950 req.starting_psn = id_priv->seq_num;
3951 req.responder_resources = conn_param->responder_resources;
3952 req.initiator_depth = conn_param->initiator_depth;
3953 req.flow_control = conn_param->flow_control;
3954 req.retry_count = min_t(u8, 7, conn_param->retry_count);
3955 req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
3956 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3957 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3958 req.max_cm_retries = CMA_MAX_CM_RETRIES;
3959 req.srq = id_priv->srq ? 1 : 0;
3960 req.ece.vendor_id = id_priv->ece.vendor_id;
3961 req.ece.attr_mod = id_priv->ece.attr_mod;
3962
3963 trace_cm_send_req(id_priv);
3964 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
3965out:
3966 if (ret && !IS_ERR(id)) {
3967 ib_destroy_cm_id(id);
3968 id_priv->cm_id.ib = NULL;
3969 }
3970
3971 kfree(private_data);
3972 return ret;
3973}
3974
3975static int cma_connect_iw(struct rdma_id_private *id_priv,
3976 struct rdma_conn_param *conn_param)
3977{
3978 struct iw_cm_id *cm_id;
3979 int ret;
3980 struct iw_cm_conn_param iw_param;
3981
3982 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
3983 if (IS_ERR(cm_id))
3984 return PTR_ERR(cm_id);
3985
3986 cm_id->tos = id_priv->tos;
3987 cm_id->tos_set = id_priv->tos_set;
3988 id_priv->cm_id.iw = cm_id;
3989
3990 memcpy(&cm_id->local_addr, cma_src_addr(id_priv),
3991 rdma_addr_size(cma_src_addr(id_priv)));
3992 memcpy(&cm_id->remote_addr, cma_dst_addr(id_priv),
3993 rdma_addr_size(cma_dst_addr(id_priv)));
3994
3995 ret = cma_modify_qp_rtr(id_priv, conn_param);
3996 if (ret)
3997 goto out;
3998
3999 if (conn_param) {
4000 iw_param.ord = conn_param->initiator_depth;
4001 iw_param.ird = conn_param->responder_resources;
4002 iw_param.private_data = conn_param->private_data;
4003 iw_param.private_data_len = conn_param->private_data_len;
4004 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
4005 } else {
4006 memset(&iw_param, 0, sizeof iw_param);
4007 iw_param.qpn = id_priv->qp_num;
4008 }
4009 ret = iw_cm_connect(cm_id, &iw_param);
4010out:
4011 if (ret) {
4012 iw_destroy_cm_id(cm_id);
4013 id_priv->cm_id.iw = NULL;
4014 }
4015 return ret;
4016}
4017
4018int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
4019{
4020 struct rdma_id_private *id_priv;
4021 int ret;
4022
4023 id_priv = container_of(id, struct rdma_id_private, id);
4024 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
4025 return -EINVAL;
4026
4027 if (!id->qp) {
4028 id_priv->qp_num = conn_param->qp_num;
4029 id_priv->srq = conn_param->srq;
4030 }
4031
4032 if (rdma_cap_ib_cm(id->device, id->port_num)) {
4033 if (id->qp_type == IB_QPT_UD)
4034 ret = cma_resolve_ib_udp(id_priv, conn_param);
4035 else
4036 ret = cma_connect_ib(id_priv, conn_param);
4037 } else if (rdma_cap_iw_cm(id->device, id->port_num))
4038 ret = cma_connect_iw(id_priv, conn_param);
4039 else
4040 ret = -ENOSYS;
4041 if (ret)
4042 goto err;
4043
4044 return 0;
4045err:
4046 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
4047 return ret;
4048}
4049EXPORT_SYMBOL(rdma_connect);
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059int rdma_connect_ece(struct rdma_cm_id *id, struct rdma_conn_param *conn_param,
4060 struct rdma_ucm_ece *ece)
4061{
4062 struct rdma_id_private *id_priv =
4063 container_of(id, struct rdma_id_private, id);
4064
4065 id_priv->ece.vendor_id = ece->vendor_id;
4066 id_priv->ece.attr_mod = ece->attr_mod;
4067
4068 return rdma_connect(id, conn_param);
4069}
4070EXPORT_SYMBOL(rdma_connect_ece);
4071
4072static int cma_accept_ib(struct rdma_id_private *id_priv,
4073 struct rdma_conn_param *conn_param)
4074{
4075 struct ib_cm_rep_param rep;
4076 int ret;
4077
4078 ret = cma_modify_qp_rtr(id_priv, conn_param);
4079 if (ret)
4080 goto out;
4081
4082 ret = cma_modify_qp_rts(id_priv, conn_param);
4083 if (ret)
4084 goto out;
4085
4086 memset(&rep, 0, sizeof rep);
4087 rep.qp_num = id_priv->qp_num;
4088 rep.starting_psn = id_priv->seq_num;
4089 rep.private_data = conn_param->private_data;
4090 rep.private_data_len = conn_param->private_data_len;
4091 rep.responder_resources = conn_param->responder_resources;
4092 rep.initiator_depth = conn_param->initiator_depth;
4093 rep.failover_accepted = 0;
4094 rep.flow_control = conn_param->flow_control;
4095 rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
4096 rep.srq = id_priv->srq ? 1 : 0;
4097 rep.ece.vendor_id = id_priv->ece.vendor_id;
4098 rep.ece.attr_mod = id_priv->ece.attr_mod;
4099
4100 trace_cm_send_rep(id_priv);
4101 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
4102out:
4103 return ret;
4104}
4105
4106static int cma_accept_iw(struct rdma_id_private *id_priv,
4107 struct rdma_conn_param *conn_param)
4108{
4109 struct iw_cm_conn_param iw_param;
4110 int ret;
4111
4112 if (!conn_param)
4113 return -EINVAL;
4114
4115 ret = cma_modify_qp_rtr(id_priv, conn_param);
4116 if (ret)
4117 return ret;
4118
4119 iw_param.ord = conn_param->initiator_depth;
4120 iw_param.ird = conn_param->responder_resources;
4121 iw_param.private_data = conn_param->private_data;
4122 iw_param.private_data_len = conn_param->private_data_len;
4123 if (id_priv->id.qp) {
4124 iw_param.qpn = id_priv->qp_num;
4125 } else
4126 iw_param.qpn = conn_param->qp_num;
4127
4128 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
4129}
4130
4131static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
4132 enum ib_cm_sidr_status status, u32 qkey,
4133 const void *private_data, int private_data_len)
4134{
4135 struct ib_cm_sidr_rep_param rep;
4136 int ret;
4137
4138 memset(&rep, 0, sizeof rep);
4139 rep.status = status;
4140 if (status == IB_SIDR_SUCCESS) {
4141 ret = cma_set_qkey(id_priv, qkey);
4142 if (ret)
4143 return ret;
4144 rep.qp_num = id_priv->qp_num;
4145 rep.qkey = id_priv->qkey;
4146
4147 rep.ece.vendor_id = id_priv->ece.vendor_id;
4148 rep.ece.attr_mod = id_priv->ece.attr_mod;
4149 }
4150
4151 rep.private_data = private_data;
4152 rep.private_data_len = private_data_len;
4153
4154 trace_cm_send_sidr_rep(id_priv);
4155 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
4156}
4157
4158int __rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param,
4159 const char *caller)
4160{
4161 struct rdma_id_private *id_priv;
4162 int ret;
4163
4164 id_priv = container_of(id, struct rdma_id_private, id);
4165
4166 rdma_restrack_set_task(&id_priv->res, caller);
4167
4168 if (!cma_comp(id_priv, RDMA_CM_CONNECT))
4169 return -EINVAL;
4170
4171 if (!id->qp && conn_param) {
4172 id_priv->qp_num = conn_param->qp_num;
4173 id_priv->srq = conn_param->srq;
4174 }
4175
4176 if (rdma_cap_ib_cm(id->device, id->port_num)) {
4177 if (id->qp_type == IB_QPT_UD) {
4178 if (conn_param)
4179 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
4180 conn_param->qkey,
4181 conn_param->private_data,
4182 conn_param->private_data_len);
4183 else
4184 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
4185 0, NULL, 0);
4186 } else {
4187 if (conn_param)
4188 ret = cma_accept_ib(id_priv, conn_param);
4189 else
4190 ret = cma_rep_recv(id_priv);
4191 }
4192 } else if (rdma_cap_iw_cm(id->device, id->port_num))
4193 ret = cma_accept_iw(id_priv, conn_param);
4194 else
4195 ret = -ENOSYS;
4196
4197 if (ret)
4198 goto reject;
4199
4200 return 0;
4201reject:
4202 cma_modify_qp_err(id_priv);
4203 rdma_reject(id, NULL, 0, IB_CM_REJ_CONSUMER_DEFINED);
4204 return ret;
4205}
4206EXPORT_SYMBOL(__rdma_accept);
4207
4208int __rdma_accept_ece(struct rdma_cm_id *id, struct rdma_conn_param *conn_param,
4209 const char *caller, struct rdma_ucm_ece *ece)
4210{
4211 struct rdma_id_private *id_priv =
4212 container_of(id, struct rdma_id_private, id);
4213
4214 id_priv->ece.vendor_id = ece->vendor_id;
4215 id_priv->ece.attr_mod = ece->attr_mod;
4216
4217 return __rdma_accept(id, conn_param, caller);
4218}
4219EXPORT_SYMBOL(__rdma_accept_ece);
4220
4221int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
4222{
4223 struct rdma_id_private *id_priv;
4224 int ret;
4225
4226 id_priv = container_of(id, struct rdma_id_private, id);
4227 if (!id_priv->cm_id.ib)
4228 return -EINVAL;
4229
4230 switch (id->device->node_type) {
4231 case RDMA_NODE_IB_CA:
4232 ret = ib_cm_notify(id_priv->cm_id.ib, event);
4233 break;
4234 default:
4235 ret = 0;
4236 break;
4237 }
4238 return ret;
4239}
4240EXPORT_SYMBOL(rdma_notify);
4241
4242int rdma_reject(struct rdma_cm_id *id, const void *private_data,
4243 u8 private_data_len, u8 reason)
4244{
4245 struct rdma_id_private *id_priv;
4246 int ret;
4247
4248 id_priv = container_of(id, struct rdma_id_private, id);
4249 if (!id_priv->cm_id.ib)
4250 return -EINVAL;
4251
4252 if (rdma_cap_ib_cm(id->device, id->port_num)) {
4253 if (id->qp_type == IB_QPT_UD) {
4254 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0,
4255 private_data, private_data_len);
4256 } else {
4257 trace_cm_send_rej(id_priv);
4258 ret = ib_send_cm_rej(id_priv->cm_id.ib, reason, NULL, 0,
4259 private_data, private_data_len);
4260 }
4261 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
4262 ret = iw_cm_reject(id_priv->cm_id.iw,
4263 private_data, private_data_len);
4264 } else
4265 ret = -ENOSYS;
4266
4267 return ret;
4268}
4269EXPORT_SYMBOL(rdma_reject);
4270
4271int rdma_disconnect(struct rdma_cm_id *id)
4272{
4273 struct rdma_id_private *id_priv;
4274 int ret;
4275
4276 id_priv = container_of(id, struct rdma_id_private, id);
4277 if (!id_priv->cm_id.ib)
4278 return -EINVAL;
4279
4280 if (rdma_cap_ib_cm(id->device, id->port_num)) {
4281 ret = cma_modify_qp_err(id_priv);
4282 if (ret)
4283 goto out;
4284
4285 trace_cm_disconnect(id_priv);
4286 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0)) {
4287 if (!ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0))
4288 trace_cm_sent_drep(id_priv);
4289 } else {
4290 trace_cm_sent_dreq(id_priv);
4291 }
4292 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
4293 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
4294 } else
4295 ret = -EINVAL;
4296
4297out:
4298 return ret;
4299}
4300EXPORT_SYMBOL(rdma_disconnect);
4301
4302static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
4303{
4304 struct rdma_id_private *id_priv;
4305 struct cma_multicast *mc = multicast->context;
4306 struct rdma_cm_event event = {};
4307 int ret = 0;
4308
4309 id_priv = mc->id_priv;
4310 mutex_lock(&id_priv->handler_mutex);
4311 if (id_priv->state != RDMA_CM_ADDR_BOUND &&
4312 id_priv->state != RDMA_CM_ADDR_RESOLVED)
4313 goto out;
4314
4315 if (!status)
4316 status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey));
4317 else
4318 pr_debug_ratelimited("RDMA CM: MULTICAST_ERROR: failed to join multicast. status %d\n",
4319 status);
4320 mutex_lock(&id_priv->qp_mutex);
4321 if (!status && id_priv->id.qp) {
4322 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
4323 be16_to_cpu(multicast->rec.mlid));
4324 if (status)
4325 pr_debug_ratelimited("RDMA CM: MULTICAST_ERROR: failed to attach QP. status %d\n",
4326 status);
4327 }
4328 mutex_unlock(&id_priv->qp_mutex);
4329
4330 event.status = status;
4331 event.param.ud.private_data = mc->context;
4332 if (!status) {
4333 struct rdma_dev_addr *dev_addr =
4334 &id_priv->id.route.addr.dev_addr;
4335 struct net_device *ndev =
4336 dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
4337 enum ib_gid_type gid_type =
4338 id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
4339 rdma_start_port(id_priv->cma_dev->device)];
4340
4341 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
4342 ret = ib_init_ah_from_mcmember(id_priv->id.device,
4343 id_priv->id.port_num,
4344 &multicast->rec,
4345 ndev, gid_type,
4346 &event.param.ud.ah_attr);
4347 if (ret)
4348 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
4349
4350 event.param.ud.qp_num = 0xFFFFFF;
4351 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
4352 if (ndev)
4353 dev_put(ndev);
4354 } else
4355 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
4356
4357 ret = cma_cm_event_handler(id_priv, &event);
4358
4359 rdma_destroy_ah_attr(&event.param.ud.ah_attr);
4360 if (ret) {
4361 destroy_id_handler_unlock(id_priv);
4362 return 0;
4363 }
4364
4365out:
4366 mutex_unlock(&id_priv->handler_mutex);
4367 return 0;
4368}
4369
4370static void cma_set_mgid(struct rdma_id_private *id_priv,
4371 struct sockaddr *addr, union ib_gid *mgid)
4372{
4373 unsigned char mc_map[MAX_ADDR_LEN];
4374 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
4375 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
4376 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
4377
4378 if (cma_any_addr(addr)) {
4379 memset(mgid, 0, sizeof *mgid);
4380 } else if ((addr->sa_family == AF_INET6) &&
4381 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
4382 0xFF10A01B)) {
4383
4384 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
4385 } else if (addr->sa_family == AF_IB) {
4386 memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid);
4387 } else if (addr->sa_family == AF_INET6) {
4388 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
4389 if (id_priv->id.ps == RDMA_PS_UDP)
4390 mc_map[7] = 0x01;
4391 *mgid = *(union ib_gid *) (mc_map + 4);
4392 } else {
4393 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
4394 if (id_priv->id.ps == RDMA_PS_UDP)
4395 mc_map[7] = 0x01;
4396 *mgid = *(union ib_gid *) (mc_map + 4);
4397 }
4398}
4399
4400static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
4401 struct cma_multicast *mc)
4402{
4403 struct ib_sa_mcmember_rec rec;
4404 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
4405 ib_sa_comp_mask comp_mask;
4406 int ret;
4407
4408 ib_addr_get_mgid(dev_addr, &rec.mgid);
4409 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
4410 &rec.mgid, &rec);
4411 if (ret)
4412 return ret;
4413
4414 ret = cma_set_qkey(id_priv, 0);
4415 if (ret)
4416 return ret;
4417
4418 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
4419 rec.qkey = cpu_to_be32(id_priv->qkey);
4420 rdma_addr_get_sgid(dev_addr, &rec.port_gid);
4421 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
4422 rec.join_state = mc->join_state;
4423
4424 if ((rec.join_state == BIT(SENDONLY_FULLMEMBER_JOIN)) &&
4425 (!ib_sa_sendonly_fullmem_support(&sa_client,
4426 id_priv->id.device,
4427 id_priv->id.port_num))) {
4428 dev_warn(
4429 &id_priv->id.device->dev,
4430 "RDMA CM: port %u Unable to multicast join: SM doesn't support Send Only Full Member option\n",
4431 id_priv->id.port_num);
4432 return -EOPNOTSUPP;
4433 }
4434
4435 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
4436 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
4437 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
4438 IB_SA_MCMEMBER_REC_FLOW_LABEL |
4439 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
4440
4441 if (id_priv->id.ps == RDMA_PS_IPOIB)
4442 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
4443 IB_SA_MCMEMBER_REC_RATE_SELECTOR |
4444 IB_SA_MCMEMBER_REC_MTU_SELECTOR |
4445 IB_SA_MCMEMBER_REC_MTU |
4446 IB_SA_MCMEMBER_REC_HOP_LIMIT;
4447
4448 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
4449 id_priv->id.port_num, &rec,
4450 comp_mask, GFP_KERNEL,
4451 cma_ib_mc_handler, mc);
4452 return PTR_ERR_OR_ZERO(mc->multicast.ib);
4453}
4454
4455static void iboe_mcast_work_handler(struct work_struct *work)
4456{
4457 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
4458 struct cma_multicast *mc = mw->mc;
4459 struct ib_sa_multicast *m = mc->multicast.ib;
4460
4461 mc->multicast.ib->context = mc;
4462 cma_ib_mc_handler(0, m);
4463 kref_put(&mc->mcref, release_mc);
4464 kfree(mw);
4465}
4466
4467static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid,
4468 enum ib_gid_type gid_type)
4469{
4470 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
4471 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
4472
4473 if (cma_any_addr(addr)) {
4474 memset(mgid, 0, sizeof *mgid);
4475 } else if (addr->sa_family == AF_INET6) {
4476 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
4477 } else {
4478 mgid->raw[0] =
4479 (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) ? 0 : 0xff;
4480 mgid->raw[1] =
4481 (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) ? 0 : 0x0e;
4482 mgid->raw[2] = 0;
4483 mgid->raw[3] = 0;
4484 mgid->raw[4] = 0;
4485 mgid->raw[5] = 0;
4486 mgid->raw[6] = 0;
4487 mgid->raw[7] = 0;
4488 mgid->raw[8] = 0;
4489 mgid->raw[9] = 0;
4490 mgid->raw[10] = 0xff;
4491 mgid->raw[11] = 0xff;
4492 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
4493 }
4494}
4495
4496static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
4497 struct cma_multicast *mc)
4498{
4499 struct iboe_mcast_work *work;
4500 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
4501 int err = 0;
4502 struct sockaddr *addr = (struct sockaddr *)&mc->addr;
4503 struct net_device *ndev = NULL;
4504 enum ib_gid_type gid_type;
4505 bool send_only;
4506
4507 send_only = mc->join_state == BIT(SENDONLY_FULLMEMBER_JOIN);
4508
4509 if (cma_zero_addr((struct sockaddr *)&mc->addr))
4510 return -EINVAL;
4511
4512 work = kzalloc(sizeof *work, GFP_KERNEL);
4513 if (!work)
4514 return -ENOMEM;
4515
4516 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
4517 if (!mc->multicast.ib) {
4518 err = -ENOMEM;
4519 goto out1;
4520 }
4521
4522 gid_type = id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
4523 rdma_start_port(id_priv->cma_dev->device)];
4524 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid, gid_type);
4525
4526 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
4527 if (id_priv->id.ps == RDMA_PS_UDP)
4528 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
4529
4530 if (dev_addr->bound_dev_if)
4531 ndev = dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
4532 if (!ndev) {
4533 err = -ENODEV;
4534 goto out2;
4535 }
4536 mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
4537 mc->multicast.ib->rec.hop_limit = 1;
4538 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
4539
4540 if (addr->sa_family == AF_INET) {
4541 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) {
4542 mc->multicast.ib->rec.hop_limit = IPV6_DEFAULT_HOPLIMIT;
4543 if (!send_only) {
4544 err = cma_igmp_send(ndev, &mc->multicast.ib->rec.mgid,
4545 true);
4546 }
4547 }
4548 } else {
4549 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP)
4550 err = -ENOTSUPP;
4551 }
4552 dev_put(ndev);
4553 if (err || !mc->multicast.ib->rec.mtu) {
4554 if (!err)
4555 err = -EINVAL;
4556 goto out2;
4557 }
4558 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
4559 &mc->multicast.ib->rec.port_gid);
4560 work->id = id_priv;
4561 work->mc = mc;
4562 INIT_WORK(&work->work, iboe_mcast_work_handler);
4563 kref_get(&mc->mcref);
4564 queue_work(cma_wq, &work->work);
4565
4566 return 0;
4567
4568out2:
4569 kfree(mc->multicast.ib);
4570out1:
4571 kfree(work);
4572 return err;
4573}
4574
4575int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
4576 u8 join_state, void *context)
4577{
4578 struct rdma_id_private *id_priv;
4579 struct cma_multicast *mc;
4580 int ret;
4581
4582 if (!id->device)
4583 return -EINVAL;
4584
4585 id_priv = container_of(id, struct rdma_id_private, id);
4586 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
4587 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
4588 return -EINVAL;
4589
4590 mc = kmalloc(sizeof *mc, GFP_KERNEL);
4591 if (!mc)
4592 return -ENOMEM;
4593
4594 memcpy(&mc->addr, addr, rdma_addr_size(addr));
4595 mc->context = context;
4596 mc->id_priv = id_priv;
4597 mc->join_state = join_state;
4598
4599 if (rdma_protocol_roce(id->device, id->port_num)) {
4600 kref_init(&mc->mcref);
4601 ret = cma_iboe_join_multicast(id_priv, mc);
4602 if (ret)
4603 goto out_err;
4604 } else if (rdma_cap_ib_mcast(id->device, id->port_num)) {
4605 ret = cma_join_ib_multicast(id_priv, mc);
4606 if (ret)
4607 goto out_err;
4608 } else {
4609 ret = -ENOSYS;
4610 goto out_err;
4611 }
4612
4613 spin_lock(&id_priv->lock);
4614 list_add(&mc->list, &id_priv->mc_list);
4615 spin_unlock(&id_priv->lock);
4616
4617 return 0;
4618out_err:
4619 kfree(mc);
4620 return ret;
4621}
4622EXPORT_SYMBOL(rdma_join_multicast);
4623
4624void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
4625{
4626 struct rdma_id_private *id_priv;
4627 struct cma_multicast *mc;
4628
4629 id_priv = container_of(id, struct rdma_id_private, id);
4630 spin_lock_irq(&id_priv->lock);
4631 list_for_each_entry(mc, &id_priv->mc_list, list) {
4632 if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) {
4633 list_del(&mc->list);
4634 spin_unlock_irq(&id_priv->lock);
4635
4636 if (id->qp)
4637 ib_detach_mcast(id->qp,
4638 &mc->multicast.ib->rec.mgid,
4639 be16_to_cpu(mc->multicast.ib->rec.mlid));
4640
4641 BUG_ON(id_priv->cma_dev->device != id->device);
4642
4643 if (rdma_cap_ib_mcast(id->device, id->port_num)) {
4644 ib_sa_free_multicast(mc->multicast.ib);
4645 kfree(mc);
4646 } else if (rdma_protocol_roce(id->device, id->port_num)) {
4647 cma_leave_roce_mc_group(id_priv, mc);
4648 }
4649 return;
4650 }
4651 }
4652 spin_unlock_irq(&id_priv->lock);
4653}
4654EXPORT_SYMBOL(rdma_leave_multicast);
4655
4656static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
4657{
4658 struct rdma_dev_addr *dev_addr;
4659 struct cma_ndev_work *work;
4660
4661 dev_addr = &id_priv->id.route.addr.dev_addr;
4662
4663 if ((dev_addr->bound_dev_if == ndev->ifindex) &&
4664 (net_eq(dev_net(ndev), dev_addr->net)) &&
4665 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
4666 pr_info("RDMA CM addr change for ndev %s used by id %p\n",
4667 ndev->name, &id_priv->id);
4668 work = kzalloc(sizeof *work, GFP_KERNEL);
4669 if (!work)
4670 return -ENOMEM;
4671
4672 INIT_WORK(&work->work, cma_ndev_work_handler);
4673 work->id = id_priv;
4674 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
4675 cma_id_get(id_priv);
4676 queue_work(cma_wq, &work->work);
4677 }
4678
4679 return 0;
4680}
4681
4682static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
4683 void *ptr)
4684{
4685 struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
4686 struct cma_device *cma_dev;
4687 struct rdma_id_private *id_priv;
4688 int ret = NOTIFY_DONE;
4689
4690 if (event != NETDEV_BONDING_FAILOVER)
4691 return NOTIFY_DONE;
4692
4693 if (!netif_is_bond_master(ndev))
4694 return NOTIFY_DONE;
4695
4696 mutex_lock(&lock);
4697 list_for_each_entry(cma_dev, &dev_list, list)
4698 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
4699 ret = cma_netdev_change(ndev, id_priv);
4700 if (ret)
4701 goto out;
4702 }
4703
4704out:
4705 mutex_unlock(&lock);
4706 return ret;
4707}
4708
4709static struct notifier_block cma_nb = {
4710 .notifier_call = cma_netdev_callback
4711};
4712
4713static int cma_add_one(struct ib_device *device)
4714{
4715 struct cma_device *cma_dev;
4716 struct rdma_id_private *id_priv;
4717 unsigned int i;
4718 unsigned long supported_gids = 0;
4719 int ret;
4720
4721 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
4722 if (!cma_dev)
4723 return -ENOMEM;
4724
4725 cma_dev->device = device;
4726 cma_dev->default_gid_type = kcalloc(device->phys_port_cnt,
4727 sizeof(*cma_dev->default_gid_type),
4728 GFP_KERNEL);
4729 if (!cma_dev->default_gid_type) {
4730 ret = -ENOMEM;
4731 goto free_cma_dev;
4732 }
4733
4734 cma_dev->default_roce_tos = kcalloc(device->phys_port_cnt,
4735 sizeof(*cma_dev->default_roce_tos),
4736 GFP_KERNEL);
4737 if (!cma_dev->default_roce_tos) {
4738 ret = -ENOMEM;
4739 goto free_gid_type;
4740 }
4741
4742 rdma_for_each_port (device, i) {
4743 supported_gids = roce_gid_type_mask_support(device, i);
4744 WARN_ON(!supported_gids);
4745 if (supported_gids & (1 << CMA_PREFERRED_ROCE_GID_TYPE))
4746 cma_dev->default_gid_type[i - rdma_start_port(device)] =
4747 CMA_PREFERRED_ROCE_GID_TYPE;
4748 else
4749 cma_dev->default_gid_type[i - rdma_start_port(device)] =
4750 find_first_bit(&supported_gids, BITS_PER_LONG);
4751 cma_dev->default_roce_tos[i - rdma_start_port(device)] = 0;
4752 }
4753
4754 init_completion(&cma_dev->comp);
4755 refcount_set(&cma_dev->refcount, 1);
4756 INIT_LIST_HEAD(&cma_dev->id_list);
4757 ib_set_client_data(device, &cma_client, cma_dev);
4758
4759 mutex_lock(&lock);
4760 list_add_tail(&cma_dev->list, &dev_list);
4761 list_for_each_entry(id_priv, &listen_any_list, list)
4762 cma_listen_on_dev(id_priv, cma_dev);
4763 mutex_unlock(&lock);
4764
4765 trace_cm_add_one(device);
4766 return 0;
4767
4768free_gid_type:
4769 kfree(cma_dev->default_gid_type);
4770
4771free_cma_dev:
4772 kfree(cma_dev);
4773 return ret;
4774}
4775
4776static void cma_send_device_removal_put(struct rdma_id_private *id_priv)
4777{
4778 struct rdma_cm_event event = { .event = RDMA_CM_EVENT_DEVICE_REMOVAL };
4779 enum rdma_cm_state state;
4780 unsigned long flags;
4781
4782 mutex_lock(&id_priv->handler_mutex);
4783
4784 spin_lock_irqsave(&id_priv->lock, flags);
4785 state = id_priv->state;
4786 if (state == RDMA_CM_DESTROYING || state == RDMA_CM_DEVICE_REMOVAL) {
4787 spin_unlock_irqrestore(&id_priv->lock, flags);
4788 mutex_unlock(&id_priv->handler_mutex);
4789 cma_id_put(id_priv);
4790 return;
4791 }
4792 id_priv->state = RDMA_CM_DEVICE_REMOVAL;
4793 spin_unlock_irqrestore(&id_priv->lock, flags);
4794
4795 if (cma_cm_event_handler(id_priv, &event)) {
4796
4797
4798
4799
4800 cma_id_put(id_priv);
4801 mutex_unlock(&id_priv->handler_mutex);
4802 trace_cm_id_destroy(id_priv);
4803 _destroy_id(id_priv, state);
4804 return;
4805 }
4806 mutex_unlock(&id_priv->handler_mutex);
4807
4808
4809
4810
4811
4812 cma_cancel_operation(id_priv, state);
4813 cma_id_put(id_priv);
4814}
4815
4816static void cma_process_remove(struct cma_device *cma_dev)
4817{
4818 mutex_lock(&lock);
4819 while (!list_empty(&cma_dev->id_list)) {
4820 struct rdma_id_private *id_priv = list_first_entry(
4821 &cma_dev->id_list, struct rdma_id_private, list);
4822
4823 list_del(&id_priv->listen_list);
4824 list_del_init(&id_priv->list);
4825 cma_id_get(id_priv);
4826 mutex_unlock(&lock);
4827
4828 cma_send_device_removal_put(id_priv);
4829
4830 mutex_lock(&lock);
4831 }
4832 mutex_unlock(&lock);
4833
4834 cma_dev_put(cma_dev);
4835 wait_for_completion(&cma_dev->comp);
4836}
4837
4838static void cma_remove_one(struct ib_device *device, void *client_data)
4839{
4840 struct cma_device *cma_dev = client_data;
4841
4842 trace_cm_remove_one(device);
4843
4844 mutex_lock(&lock);
4845 list_del(&cma_dev->list);
4846 mutex_unlock(&lock);
4847
4848 cma_process_remove(cma_dev);
4849 kfree(cma_dev->default_roce_tos);
4850 kfree(cma_dev->default_gid_type);
4851 kfree(cma_dev);
4852}
4853
4854static int cma_init_net(struct net *net)
4855{
4856 struct cma_pernet *pernet = cma_pernet(net);
4857
4858 xa_init(&pernet->tcp_ps);
4859 xa_init(&pernet->udp_ps);
4860 xa_init(&pernet->ipoib_ps);
4861 xa_init(&pernet->ib_ps);
4862
4863 return 0;
4864}
4865
4866static void cma_exit_net(struct net *net)
4867{
4868 struct cma_pernet *pernet = cma_pernet(net);
4869
4870 WARN_ON(!xa_empty(&pernet->tcp_ps));
4871 WARN_ON(!xa_empty(&pernet->udp_ps));
4872 WARN_ON(!xa_empty(&pernet->ipoib_ps));
4873 WARN_ON(!xa_empty(&pernet->ib_ps));
4874}
4875
4876static struct pernet_operations cma_pernet_operations = {
4877 .init = cma_init_net,
4878 .exit = cma_exit_net,
4879 .id = &cma_pernet_id,
4880 .size = sizeof(struct cma_pernet),
4881};
4882
4883static int __init cma_init(void)
4884{
4885 int ret;
4886
4887
4888
4889
4890
4891
4892
4893 if (IS_ENABLED(CONFIG_LOCKDEP)) {
4894 rtnl_lock();
4895 mutex_lock(&lock);
4896 mutex_unlock(&lock);
4897 rtnl_unlock();
4898 }
4899
4900 cma_wq = alloc_ordered_workqueue("rdma_cm", WQ_MEM_RECLAIM);
4901 if (!cma_wq)
4902 return -ENOMEM;
4903
4904 ret = register_pernet_subsys(&cma_pernet_operations);
4905 if (ret)
4906 goto err_wq;
4907
4908 ib_sa_register_client(&sa_client);
4909 register_netdevice_notifier(&cma_nb);
4910
4911 ret = ib_register_client(&cma_client);
4912 if (ret)
4913 goto err;
4914
4915 ret = cma_configfs_init();
4916 if (ret)
4917 goto err_ib;
4918
4919 return 0;
4920
4921err_ib:
4922 ib_unregister_client(&cma_client);
4923err:
4924 unregister_netdevice_notifier(&cma_nb);
4925 ib_sa_unregister_client(&sa_client);
4926 unregister_pernet_subsys(&cma_pernet_operations);
4927err_wq:
4928 destroy_workqueue(cma_wq);
4929 return ret;
4930}
4931
4932static void __exit cma_cleanup(void)
4933{
4934 cma_configfs_exit();
4935 ib_unregister_client(&cma_client);
4936 unregister_netdevice_notifier(&cma_nb);
4937 ib_sa_unregister_client(&sa_client);
4938 unregister_pernet_subsys(&cma_pernet_operations);
4939 destroy_workqueue(cma_wq);
4940}
4941
4942module_init(cma_init);
4943module_exit(cma_cleanup);
4944