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36#include <linux/completion.h>
37#include <linux/in.h>
38#include <linux/in6.h>
39#include <linux/mutex.h>
40#include <linux/random.h>
41#include <linux/igmp.h>
42#include <linux/idr.h>
43#include <linux/inetdevice.h>
44#include <linux/slab.h>
45#include <linux/module.h>
46#include <net/route.h>
47
48#include <net/net_namespace.h>
49#include <net/netns/generic.h>
50#include <net/tcp.h>
51#include <net/ipv6.h>
52#include <net/ip_fib.h>
53#include <net/ip6_route.h>
54
55#include <rdma/rdma_cm.h>
56#include <rdma/rdma_cm_ib.h>
57#include <rdma/rdma_netlink.h>
58#include <rdma/ib.h>
59#include <rdma/ib_cache.h>
60#include <rdma/ib_cm.h>
61#include <rdma/ib_sa.h>
62#include <rdma/iw_cm.h>
63
64#include "core_priv.h"
65
66MODULE_AUTHOR("Sean Hefty");
67MODULE_DESCRIPTION("Generic RDMA CM Agent");
68MODULE_LICENSE("Dual BSD/GPL");
69
70#define CMA_CM_RESPONSE_TIMEOUT 20
71#define CMA_QUERY_CLASSPORT_INFO_TIMEOUT 3000
72#define CMA_MAX_CM_RETRIES 15
73#define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
74#define CMA_IBOE_PACKET_LIFETIME 18
75#define CMA_PREFERRED_ROCE_GID_TYPE IB_GID_TYPE_ROCE_UDP_ENCAP
76
77static const char * const cma_events[] = {
78 [RDMA_CM_EVENT_ADDR_RESOLVED] = "address resolved",
79 [RDMA_CM_EVENT_ADDR_ERROR] = "address error",
80 [RDMA_CM_EVENT_ROUTE_RESOLVED] = "route resolved ",
81 [RDMA_CM_EVENT_ROUTE_ERROR] = "route error",
82 [RDMA_CM_EVENT_CONNECT_REQUEST] = "connect request",
83 [RDMA_CM_EVENT_CONNECT_RESPONSE] = "connect response",
84 [RDMA_CM_EVENT_CONNECT_ERROR] = "connect error",
85 [RDMA_CM_EVENT_UNREACHABLE] = "unreachable",
86 [RDMA_CM_EVENT_REJECTED] = "rejected",
87 [RDMA_CM_EVENT_ESTABLISHED] = "established",
88 [RDMA_CM_EVENT_DISCONNECTED] = "disconnected",
89 [RDMA_CM_EVENT_DEVICE_REMOVAL] = "device removal",
90 [RDMA_CM_EVENT_MULTICAST_JOIN] = "multicast join",
91 [RDMA_CM_EVENT_MULTICAST_ERROR] = "multicast error",
92 [RDMA_CM_EVENT_ADDR_CHANGE] = "address change",
93 [RDMA_CM_EVENT_TIMEWAIT_EXIT] = "timewait exit",
94};
95
96const char *__attribute_const__ rdma_event_msg(enum rdma_cm_event_type event)
97{
98 size_t index = event;
99
100 return (index < ARRAY_SIZE(cma_events) && cma_events[index]) ?
101 cma_events[index] : "unrecognized event";
102}
103EXPORT_SYMBOL(rdma_event_msg);
104
105const char *__attribute_const__ rdma_reject_msg(struct rdma_cm_id *id,
106 int reason)
107{
108 if (rdma_ib_or_roce(id->device, id->port_num))
109 return ibcm_reject_msg(reason);
110
111 if (rdma_protocol_iwarp(id->device, id->port_num))
112 return iwcm_reject_msg(reason);
113
114 WARN_ON_ONCE(1);
115 return "unrecognized transport";
116}
117EXPORT_SYMBOL(rdma_reject_msg);
118
119bool rdma_is_consumer_reject(struct rdma_cm_id *id, int reason)
120{
121 if (rdma_ib_or_roce(id->device, id->port_num))
122 return reason == IB_CM_REJ_CONSUMER_DEFINED;
123
124 if (rdma_protocol_iwarp(id->device, id->port_num))
125 return reason == -ECONNREFUSED;
126
127 WARN_ON_ONCE(1);
128 return false;
129}
130EXPORT_SYMBOL(rdma_is_consumer_reject);
131
132const void *rdma_consumer_reject_data(struct rdma_cm_id *id,
133 struct rdma_cm_event *ev, u8 *data_len)
134{
135 const void *p;
136
137 if (rdma_is_consumer_reject(id, ev->status)) {
138 *data_len = ev->param.conn.private_data_len;
139 p = ev->param.conn.private_data;
140 } else {
141 *data_len = 0;
142 p = NULL;
143 }
144 return p;
145}
146EXPORT_SYMBOL(rdma_consumer_reject_data);
147
148static void cma_add_one(struct ib_device *device);
149static void cma_remove_one(struct ib_device *device, void *client_data);
150
151static struct ib_client cma_client = {
152 .name = "cma",
153 .add = cma_add_one,
154 .remove = cma_remove_one
155};
156
157static struct ib_sa_client sa_client;
158static struct rdma_addr_client addr_client;
159static LIST_HEAD(dev_list);
160static LIST_HEAD(listen_any_list);
161static DEFINE_MUTEX(lock);
162static struct workqueue_struct *cma_wq;
163static unsigned int cma_pernet_id;
164
165struct cma_pernet {
166 struct idr tcp_ps;
167 struct idr udp_ps;
168 struct idr ipoib_ps;
169 struct idr ib_ps;
170};
171
172static struct cma_pernet *cma_pernet(struct net *net)
173{
174 return net_generic(net, cma_pernet_id);
175}
176
177static struct idr *cma_pernet_idr(struct net *net, enum rdma_port_space ps)
178{
179 struct cma_pernet *pernet = cma_pernet(net);
180
181 switch (ps) {
182 case RDMA_PS_TCP:
183 return &pernet->tcp_ps;
184 case RDMA_PS_UDP:
185 return &pernet->udp_ps;
186 case RDMA_PS_IPOIB:
187 return &pernet->ipoib_ps;
188 case RDMA_PS_IB:
189 return &pernet->ib_ps;
190 default:
191 return NULL;
192 }
193}
194
195struct cma_device {
196 struct list_head list;
197 struct ib_device *device;
198 struct completion comp;
199 atomic_t refcount;
200 struct list_head id_list;
201 enum ib_gid_type *default_gid_type;
202 u8 *default_roce_tos;
203};
204
205struct rdma_bind_list {
206 enum rdma_port_space ps;
207 struct hlist_head owners;
208 unsigned short port;
209};
210
211struct class_port_info_context {
212 struct ib_class_port_info *class_port_info;
213 struct ib_device *device;
214 struct completion done;
215 struct ib_sa_query *sa_query;
216 u8 port_num;
217};
218
219static int cma_ps_alloc(struct net *net, enum rdma_port_space ps,
220 struct rdma_bind_list *bind_list, int snum)
221{
222 struct idr *idr = cma_pernet_idr(net, ps);
223
224 return idr_alloc(idr, bind_list, snum, snum + 1, GFP_KERNEL);
225}
226
227static struct rdma_bind_list *cma_ps_find(struct net *net,
228 enum rdma_port_space ps, int snum)
229{
230 struct idr *idr = cma_pernet_idr(net, ps);
231
232 return idr_find(idr, snum);
233}
234
235static void cma_ps_remove(struct net *net, enum rdma_port_space ps, int snum)
236{
237 struct idr *idr = cma_pernet_idr(net, ps);
238
239 idr_remove(idr, snum);
240}
241
242enum {
243 CMA_OPTION_AFONLY,
244};
245
246void cma_ref_dev(struct cma_device *cma_dev)
247{
248 atomic_inc(&cma_dev->refcount);
249}
250
251struct cma_device *cma_enum_devices_by_ibdev(cma_device_filter filter,
252 void *cookie)
253{
254 struct cma_device *cma_dev;
255 struct cma_device *found_cma_dev = NULL;
256
257 mutex_lock(&lock);
258
259 list_for_each_entry(cma_dev, &dev_list, list)
260 if (filter(cma_dev->device, cookie)) {
261 found_cma_dev = cma_dev;
262 break;
263 }
264
265 if (found_cma_dev)
266 cma_ref_dev(found_cma_dev);
267 mutex_unlock(&lock);
268 return found_cma_dev;
269}
270
271int cma_get_default_gid_type(struct cma_device *cma_dev,
272 unsigned int port)
273{
274 if (!rdma_is_port_valid(cma_dev->device, port))
275 return -EINVAL;
276
277 return cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)];
278}
279
280int cma_set_default_gid_type(struct cma_device *cma_dev,
281 unsigned int port,
282 enum ib_gid_type default_gid_type)
283{
284 unsigned long supported_gids;
285
286 if (!rdma_is_port_valid(cma_dev->device, port))
287 return -EINVAL;
288
289 supported_gids = roce_gid_type_mask_support(cma_dev->device, port);
290
291 if (!(supported_gids & 1 << default_gid_type))
292 return -EINVAL;
293
294 cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)] =
295 default_gid_type;
296
297 return 0;
298}
299
300int cma_get_default_roce_tos(struct cma_device *cma_dev, unsigned int port)
301{
302 if (!rdma_is_port_valid(cma_dev->device, port))
303 return -EINVAL;
304
305 return cma_dev->default_roce_tos[port - rdma_start_port(cma_dev->device)];
306}
307
308int cma_set_default_roce_tos(struct cma_device *cma_dev, unsigned int port,
309 u8 default_roce_tos)
310{
311 if (!rdma_is_port_valid(cma_dev->device, port))
312 return -EINVAL;
313
314 cma_dev->default_roce_tos[port - rdma_start_port(cma_dev->device)] =
315 default_roce_tos;
316
317 return 0;
318}
319struct ib_device *cma_get_ib_dev(struct cma_device *cma_dev)
320{
321 return cma_dev->device;
322}
323
324
325
326
327
328
329
330struct rdma_id_private {
331 struct rdma_cm_id id;
332
333 struct rdma_bind_list *bind_list;
334 struct hlist_node node;
335 struct list_head list;
336 struct list_head listen_list;
337 struct cma_device *cma_dev;
338 struct list_head mc_list;
339
340 int internal_id;
341 enum rdma_cm_state state;
342 spinlock_t lock;
343 struct mutex qp_mutex;
344
345 struct completion comp;
346 atomic_t refcount;
347 struct mutex handler_mutex;
348
349 int backlog;
350 int timeout_ms;
351 struct ib_sa_query *query;
352 int query_id;
353 union {
354 struct ib_cm_id *ib;
355 struct iw_cm_id *iw;
356 } cm_id;
357
358 u32 seq_num;
359 u32 qkey;
360 u32 qp_num;
361 pid_t owner;
362 u32 options;
363 u8 srq;
364 u8 tos;
365 bool tos_set;
366 u8 reuseaddr;
367 u8 afonly;
368 enum ib_gid_type gid_type;
369};
370
371struct cma_multicast {
372 struct rdma_id_private *id_priv;
373 union {
374 struct ib_sa_multicast *ib;
375 } multicast;
376 struct list_head list;
377 void *context;
378 struct sockaddr_storage addr;
379 struct kref mcref;
380 bool igmp_joined;
381 u8 join_state;
382};
383
384struct cma_work {
385 struct work_struct work;
386 struct rdma_id_private *id;
387 enum rdma_cm_state old_state;
388 enum rdma_cm_state new_state;
389 struct rdma_cm_event event;
390};
391
392struct cma_ndev_work {
393 struct work_struct work;
394 struct rdma_id_private *id;
395 struct rdma_cm_event event;
396};
397
398struct iboe_mcast_work {
399 struct work_struct work;
400 struct rdma_id_private *id;
401 struct cma_multicast *mc;
402};
403
404union cma_ip_addr {
405 struct in6_addr ip6;
406 struct {
407 __be32 pad[3];
408 __be32 addr;
409 } ip4;
410};
411
412struct cma_hdr {
413 u8 cma_version;
414 u8 ip_version;
415 __be16 port;
416 union cma_ip_addr src_addr;
417 union cma_ip_addr dst_addr;
418};
419
420#define CMA_VERSION 0x00
421
422struct cma_req_info {
423 struct ib_device *device;
424 int port;
425 union ib_gid local_gid;
426 __be64 service_id;
427 u16 pkey;
428 bool has_gid:1;
429};
430
431static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp)
432{
433 unsigned long flags;
434 int ret;
435
436 spin_lock_irqsave(&id_priv->lock, flags);
437 ret = (id_priv->state == comp);
438 spin_unlock_irqrestore(&id_priv->lock, flags);
439 return ret;
440}
441
442static int cma_comp_exch(struct rdma_id_private *id_priv,
443 enum rdma_cm_state comp, enum rdma_cm_state exch)
444{
445 unsigned long flags;
446 int ret;
447
448 spin_lock_irqsave(&id_priv->lock, flags);
449 if ((ret = (id_priv->state == comp)))
450 id_priv->state = exch;
451 spin_unlock_irqrestore(&id_priv->lock, flags);
452 return ret;
453}
454
455static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv,
456 enum rdma_cm_state exch)
457{
458 unsigned long flags;
459 enum rdma_cm_state old;
460
461 spin_lock_irqsave(&id_priv->lock, flags);
462 old = id_priv->state;
463 id_priv->state = exch;
464 spin_unlock_irqrestore(&id_priv->lock, flags);
465 return old;
466}
467
468static inline u8 cma_get_ip_ver(const struct cma_hdr *hdr)
469{
470 return hdr->ip_version >> 4;
471}
472
473static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
474{
475 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
476}
477
478static int cma_igmp_send(struct net_device *ndev, union ib_gid *mgid, bool join)
479{
480 struct in_device *in_dev = NULL;
481
482 if (ndev) {
483 rtnl_lock();
484 in_dev = __in_dev_get_rtnl(ndev);
485 if (in_dev) {
486 if (join)
487 ip_mc_inc_group(in_dev,
488 *(__be32 *)(mgid->raw + 12));
489 else
490 ip_mc_dec_group(in_dev,
491 *(__be32 *)(mgid->raw + 12));
492 }
493 rtnl_unlock();
494 }
495 return (in_dev) ? 0 : -ENODEV;
496}
497
498static void _cma_attach_to_dev(struct rdma_id_private *id_priv,
499 struct cma_device *cma_dev)
500{
501 cma_ref_dev(cma_dev);
502 id_priv->cma_dev = cma_dev;
503 id_priv->gid_type = 0;
504 id_priv->id.device = cma_dev->device;
505 id_priv->id.route.addr.dev_addr.transport =
506 rdma_node_get_transport(cma_dev->device->node_type);
507 list_add_tail(&id_priv->list, &cma_dev->id_list);
508}
509
510static void cma_attach_to_dev(struct rdma_id_private *id_priv,
511 struct cma_device *cma_dev)
512{
513 _cma_attach_to_dev(id_priv, cma_dev);
514 id_priv->gid_type =
515 cma_dev->default_gid_type[id_priv->id.port_num -
516 rdma_start_port(cma_dev->device)];
517}
518
519void cma_deref_dev(struct cma_device *cma_dev)
520{
521 if (atomic_dec_and_test(&cma_dev->refcount))
522 complete(&cma_dev->comp);
523}
524
525static inline void release_mc(struct kref *kref)
526{
527 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
528
529 kfree(mc->multicast.ib);
530 kfree(mc);
531}
532
533static void cma_release_dev(struct rdma_id_private *id_priv)
534{
535 mutex_lock(&lock);
536 list_del(&id_priv->list);
537 cma_deref_dev(id_priv->cma_dev);
538 id_priv->cma_dev = NULL;
539 mutex_unlock(&lock);
540}
541
542static inline struct sockaddr *cma_src_addr(struct rdma_id_private *id_priv)
543{
544 return (struct sockaddr *) &id_priv->id.route.addr.src_addr;
545}
546
547static inline struct sockaddr *cma_dst_addr(struct rdma_id_private *id_priv)
548{
549 return (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
550}
551
552static inline unsigned short cma_family(struct rdma_id_private *id_priv)
553{
554 return id_priv->id.route.addr.src_addr.ss_family;
555}
556
557static int cma_set_qkey(struct rdma_id_private *id_priv, u32 qkey)
558{
559 struct ib_sa_mcmember_rec rec;
560 int ret = 0;
561
562 if (id_priv->qkey) {
563 if (qkey && id_priv->qkey != qkey)
564 return -EINVAL;
565 return 0;
566 }
567
568 if (qkey) {
569 id_priv->qkey = qkey;
570 return 0;
571 }
572
573 switch (id_priv->id.ps) {
574 case RDMA_PS_UDP:
575 case RDMA_PS_IB:
576 id_priv->qkey = RDMA_UDP_QKEY;
577 break;
578 case RDMA_PS_IPOIB:
579 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
580 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
581 id_priv->id.port_num, &rec.mgid,
582 &rec);
583 if (!ret)
584 id_priv->qkey = be32_to_cpu(rec.qkey);
585 break;
586 default:
587 break;
588 }
589 return ret;
590}
591
592static void cma_translate_ib(struct sockaddr_ib *sib, struct rdma_dev_addr *dev_addr)
593{
594 dev_addr->dev_type = ARPHRD_INFINIBAND;
595 rdma_addr_set_sgid(dev_addr, (union ib_gid *) &sib->sib_addr);
596 ib_addr_set_pkey(dev_addr, ntohs(sib->sib_pkey));
597}
598
599static int cma_translate_addr(struct sockaddr *addr, struct rdma_dev_addr *dev_addr)
600{
601 int ret;
602
603 if (addr->sa_family != AF_IB) {
604 ret = rdma_translate_ip(addr, dev_addr, NULL);
605 } else {
606 cma_translate_ib((struct sockaddr_ib *) addr, dev_addr);
607 ret = 0;
608 }
609
610 return ret;
611}
612
613static inline int cma_validate_port(struct ib_device *device, u8 port,
614 enum ib_gid_type gid_type,
615 union ib_gid *gid, int dev_type,
616 int bound_if_index)
617{
618 int ret = -ENODEV;
619 struct net_device *ndev = NULL;
620
621 if ((dev_type == ARPHRD_INFINIBAND) && !rdma_protocol_ib(device, port))
622 return ret;
623
624 if ((dev_type != ARPHRD_INFINIBAND) && rdma_protocol_ib(device, port))
625 return ret;
626
627 if (dev_type == ARPHRD_ETHER && rdma_protocol_roce(device, port))
628 ndev = dev_get_by_index(&init_net, bound_if_index);
629 else
630 gid_type = IB_GID_TYPE_IB;
631
632
633 ret = ib_find_cached_gid_by_port(device, gid, gid_type, port,
634 ndev, NULL);
635
636 if (ndev)
637 dev_put(ndev);
638
639 return ret;
640}
641
642static int cma_acquire_dev(struct rdma_id_private *id_priv,
643 struct rdma_id_private *listen_id_priv)
644{
645 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
646 struct cma_device *cma_dev;
647 union ib_gid gid, iboe_gid, *gidp;
648 int ret = -ENODEV;
649 u8 port;
650
651 if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
652 id_priv->id.ps == RDMA_PS_IPOIB)
653 return -EINVAL;
654
655 mutex_lock(&lock);
656 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
657 &iboe_gid);
658
659 memcpy(&gid, dev_addr->src_dev_addr +
660 rdma_addr_gid_offset(dev_addr), sizeof gid);
661
662 if (listen_id_priv) {
663 cma_dev = listen_id_priv->cma_dev;
664 port = listen_id_priv->id.port_num;
665 gidp = rdma_protocol_roce(cma_dev->device, port) ?
666 &iboe_gid : &gid;
667
668 ret = cma_validate_port(cma_dev->device, port,
669 rdma_protocol_ib(cma_dev->device, port) ?
670 IB_GID_TYPE_IB :
671 listen_id_priv->gid_type, gidp,
672 dev_addr->dev_type,
673 dev_addr->bound_dev_if);
674 if (!ret) {
675 id_priv->id.port_num = port;
676 goto out;
677 }
678 }
679
680 list_for_each_entry(cma_dev, &dev_list, list) {
681 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
682 if (listen_id_priv &&
683 listen_id_priv->cma_dev == cma_dev &&
684 listen_id_priv->id.port_num == port)
685 continue;
686
687 gidp = rdma_protocol_roce(cma_dev->device, port) ?
688 &iboe_gid : &gid;
689
690 ret = cma_validate_port(cma_dev->device, port,
691 rdma_protocol_ib(cma_dev->device, port) ?
692 IB_GID_TYPE_IB :
693 cma_dev->default_gid_type[port - 1],
694 gidp, dev_addr->dev_type,
695 dev_addr->bound_dev_if);
696 if (!ret) {
697 id_priv->id.port_num = port;
698 goto out;
699 }
700 }
701 }
702
703out:
704 if (!ret)
705 cma_attach_to_dev(id_priv, cma_dev);
706
707 mutex_unlock(&lock);
708 return ret;
709}
710
711
712
713
714static int cma_resolve_ib_dev(struct rdma_id_private *id_priv)
715{
716 struct cma_device *cma_dev, *cur_dev;
717 struct sockaddr_ib *addr;
718 union ib_gid gid, sgid, *dgid;
719 u16 pkey, index;
720 u8 p;
721 enum ib_port_state port_state;
722 int i;
723
724 cma_dev = NULL;
725 addr = (struct sockaddr_ib *) cma_dst_addr(id_priv);
726 dgid = (union ib_gid *) &addr->sib_addr;
727 pkey = ntohs(addr->sib_pkey);
728
729 list_for_each_entry(cur_dev, &dev_list, list) {
730 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
731 if (!rdma_cap_af_ib(cur_dev->device, p))
732 continue;
733
734 if (ib_find_cached_pkey(cur_dev->device, p, pkey, &index))
735 continue;
736
737 if (ib_get_cached_port_state(cur_dev->device, p, &port_state))
738 continue;
739 for (i = 0; !ib_get_cached_gid(cur_dev->device, p, i,
740 &gid, NULL);
741 i++) {
742 if (!memcmp(&gid, dgid, sizeof(gid))) {
743 cma_dev = cur_dev;
744 sgid = gid;
745 id_priv->id.port_num = p;
746 goto found;
747 }
748
749 if (!cma_dev && (gid.global.subnet_prefix ==
750 dgid->global.subnet_prefix) &&
751 port_state == IB_PORT_ACTIVE) {
752 cma_dev = cur_dev;
753 sgid = gid;
754 id_priv->id.port_num = p;
755 }
756 }
757 }
758 }
759
760 if (!cma_dev)
761 return -ENODEV;
762
763found:
764 cma_attach_to_dev(id_priv, cma_dev);
765 addr = (struct sockaddr_ib *) cma_src_addr(id_priv);
766 memcpy(&addr->sib_addr, &sgid, sizeof sgid);
767 cma_translate_ib(addr, &id_priv->id.route.addr.dev_addr);
768 return 0;
769}
770
771static void cma_deref_id(struct rdma_id_private *id_priv)
772{
773 if (atomic_dec_and_test(&id_priv->refcount))
774 complete(&id_priv->comp);
775}
776
777struct rdma_cm_id *rdma_create_id(struct net *net,
778 rdma_cm_event_handler event_handler,
779 void *context, enum rdma_port_space ps,
780 enum ib_qp_type qp_type)
781{
782 struct rdma_id_private *id_priv;
783
784 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
785 if (!id_priv)
786 return ERR_PTR(-ENOMEM);
787
788 id_priv->owner = task_pid_nr(current);
789 id_priv->state = RDMA_CM_IDLE;
790 id_priv->id.context = context;
791 id_priv->id.event_handler = event_handler;
792 id_priv->id.ps = ps;
793 id_priv->id.qp_type = qp_type;
794 id_priv->tos_set = false;
795 spin_lock_init(&id_priv->lock);
796 mutex_init(&id_priv->qp_mutex);
797 init_completion(&id_priv->comp);
798 atomic_set(&id_priv->refcount, 1);
799 mutex_init(&id_priv->handler_mutex);
800 INIT_LIST_HEAD(&id_priv->listen_list);
801 INIT_LIST_HEAD(&id_priv->mc_list);
802 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
803 id_priv->id.route.addr.dev_addr.net = get_net(net);
804
805 return &id_priv->id;
806}
807EXPORT_SYMBOL(rdma_create_id);
808
809static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
810{
811 struct ib_qp_attr qp_attr;
812 int qp_attr_mask, ret;
813
814 qp_attr.qp_state = IB_QPS_INIT;
815 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
816 if (ret)
817 return ret;
818
819 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
820 if (ret)
821 return ret;
822
823 qp_attr.qp_state = IB_QPS_RTR;
824 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
825 if (ret)
826 return ret;
827
828 qp_attr.qp_state = IB_QPS_RTS;
829 qp_attr.sq_psn = 0;
830 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
831
832 return ret;
833}
834
835static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
836{
837 struct ib_qp_attr qp_attr;
838 int qp_attr_mask, ret;
839
840 qp_attr.qp_state = IB_QPS_INIT;
841 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
842 if (ret)
843 return ret;
844
845 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
846}
847
848int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
849 struct ib_qp_init_attr *qp_init_attr)
850{
851 struct rdma_id_private *id_priv;
852 struct ib_qp *qp;
853 int ret;
854
855 id_priv = container_of(id, struct rdma_id_private, id);
856 if (id->device != pd->device)
857 return -EINVAL;
858
859 qp_init_attr->port_num = id->port_num;
860 qp = ib_create_qp(pd, qp_init_attr);
861 if (IS_ERR(qp))
862 return PTR_ERR(qp);
863
864 if (id->qp_type == IB_QPT_UD)
865 ret = cma_init_ud_qp(id_priv, qp);
866 else
867 ret = cma_init_conn_qp(id_priv, qp);
868 if (ret)
869 goto err;
870
871 id->qp = qp;
872 id_priv->qp_num = qp->qp_num;
873 id_priv->srq = (qp->srq != NULL);
874 return 0;
875err:
876 ib_destroy_qp(qp);
877 return ret;
878}
879EXPORT_SYMBOL(rdma_create_qp);
880
881void rdma_destroy_qp(struct rdma_cm_id *id)
882{
883 struct rdma_id_private *id_priv;
884
885 id_priv = container_of(id, struct rdma_id_private, id);
886 mutex_lock(&id_priv->qp_mutex);
887 ib_destroy_qp(id_priv->id.qp);
888 id_priv->id.qp = NULL;
889 mutex_unlock(&id_priv->qp_mutex);
890}
891EXPORT_SYMBOL(rdma_destroy_qp);
892
893static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
894 struct rdma_conn_param *conn_param)
895{
896 struct ib_qp_attr qp_attr;
897 int qp_attr_mask, ret;
898 union ib_gid sgid;
899
900 mutex_lock(&id_priv->qp_mutex);
901 if (!id_priv->id.qp) {
902 ret = 0;
903 goto out;
904 }
905
906
907 qp_attr.qp_state = IB_QPS_INIT;
908 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
909 if (ret)
910 goto out;
911
912 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
913 if (ret)
914 goto out;
915
916 qp_attr.qp_state = IB_QPS_RTR;
917 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
918 if (ret)
919 goto out;
920
921 ret = ib_query_gid(id_priv->id.device, id_priv->id.port_num,
922 rdma_ah_read_grh(&qp_attr.ah_attr)->sgid_index,
923 &sgid, NULL);
924 if (ret)
925 goto out;
926
927 BUG_ON(id_priv->cma_dev->device != id_priv->id.device);
928
929 if (conn_param)
930 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
931 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
932out:
933 mutex_unlock(&id_priv->qp_mutex);
934 return ret;
935}
936
937static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
938 struct rdma_conn_param *conn_param)
939{
940 struct ib_qp_attr qp_attr;
941 int qp_attr_mask, ret;
942
943 mutex_lock(&id_priv->qp_mutex);
944 if (!id_priv->id.qp) {
945 ret = 0;
946 goto out;
947 }
948
949 qp_attr.qp_state = IB_QPS_RTS;
950 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
951 if (ret)
952 goto out;
953
954 if (conn_param)
955 qp_attr.max_rd_atomic = conn_param->initiator_depth;
956 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
957out:
958 mutex_unlock(&id_priv->qp_mutex);
959 return ret;
960}
961
962static int cma_modify_qp_err(struct rdma_id_private *id_priv)
963{
964 struct ib_qp_attr qp_attr;
965 int ret;
966
967 mutex_lock(&id_priv->qp_mutex);
968 if (!id_priv->id.qp) {
969 ret = 0;
970 goto out;
971 }
972
973 qp_attr.qp_state = IB_QPS_ERR;
974 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
975out:
976 mutex_unlock(&id_priv->qp_mutex);
977 return ret;
978}
979
980static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
981 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
982{
983 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
984 int ret;
985 u16 pkey;
986
987 if (rdma_cap_eth_ah(id_priv->id.device, id_priv->id.port_num))
988 pkey = 0xffff;
989 else
990 pkey = ib_addr_get_pkey(dev_addr);
991
992 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
993 pkey, &qp_attr->pkey_index);
994 if (ret)
995 return ret;
996
997 qp_attr->port_num = id_priv->id.port_num;
998 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
999
1000 if (id_priv->id.qp_type == IB_QPT_UD) {
1001 ret = cma_set_qkey(id_priv, 0);
1002 if (ret)
1003 return ret;
1004
1005 qp_attr->qkey = id_priv->qkey;
1006 *qp_attr_mask |= IB_QP_QKEY;
1007 } else {
1008 qp_attr->qp_access_flags = 0;
1009 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
1010 }
1011 return 0;
1012}
1013
1014int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
1015 int *qp_attr_mask)
1016{
1017 struct rdma_id_private *id_priv;
1018 int ret = 0;
1019
1020 id_priv = container_of(id, struct rdma_id_private, id);
1021 if (rdma_cap_ib_cm(id->device, id->port_num)) {
1022 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
1023 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
1024 else
1025 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
1026 qp_attr_mask);
1027
1028 if (qp_attr->qp_state == IB_QPS_RTR)
1029 qp_attr->rq_psn = id_priv->seq_num;
1030 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
1031 if (!id_priv->cm_id.iw) {
1032 qp_attr->qp_access_flags = 0;
1033 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
1034 } else
1035 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
1036 qp_attr_mask);
1037 qp_attr->port_num = id_priv->id.port_num;
1038 *qp_attr_mask |= IB_QP_PORT;
1039 } else
1040 ret = -ENOSYS;
1041
1042 return ret;
1043}
1044EXPORT_SYMBOL(rdma_init_qp_attr);
1045
1046static inline int cma_zero_addr(struct sockaddr *addr)
1047{
1048 switch (addr->sa_family) {
1049 case AF_INET:
1050 return ipv4_is_zeronet(((struct sockaddr_in *)addr)->sin_addr.s_addr);
1051 case AF_INET6:
1052 return ipv6_addr_any(&((struct sockaddr_in6 *) addr)->sin6_addr);
1053 case AF_IB:
1054 return ib_addr_any(&((struct sockaddr_ib *) addr)->sib_addr);
1055 default:
1056 return 0;
1057 }
1058}
1059
1060static inline int cma_loopback_addr(struct sockaddr *addr)
1061{
1062 switch (addr->sa_family) {
1063 case AF_INET:
1064 return ipv4_is_loopback(((struct sockaddr_in *) addr)->sin_addr.s_addr);
1065 case AF_INET6:
1066 return ipv6_addr_loopback(&((struct sockaddr_in6 *) addr)->sin6_addr);
1067 case AF_IB:
1068 return ib_addr_loopback(&((struct sockaddr_ib *) addr)->sib_addr);
1069 default:
1070 return 0;
1071 }
1072}
1073
1074static inline int cma_any_addr(struct sockaddr *addr)
1075{
1076 return cma_zero_addr(addr) || cma_loopback_addr(addr);
1077}
1078
1079static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
1080{
1081 if (src->sa_family != dst->sa_family)
1082 return -1;
1083
1084 switch (src->sa_family) {
1085 case AF_INET:
1086 return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
1087 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
1088 case AF_INET6:
1089 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
1090 &((struct sockaddr_in6 *) dst)->sin6_addr);
1091 default:
1092 return ib_addr_cmp(&((struct sockaddr_ib *) src)->sib_addr,
1093 &((struct sockaddr_ib *) dst)->sib_addr);
1094 }
1095}
1096
1097static __be16 cma_port(struct sockaddr *addr)
1098{
1099 struct sockaddr_ib *sib;
1100
1101 switch (addr->sa_family) {
1102 case AF_INET:
1103 return ((struct sockaddr_in *) addr)->sin_port;
1104 case AF_INET6:
1105 return ((struct sockaddr_in6 *) addr)->sin6_port;
1106 case AF_IB:
1107 sib = (struct sockaddr_ib *) addr;
1108 return htons((u16) (be64_to_cpu(sib->sib_sid) &
1109 be64_to_cpu(sib->sib_sid_mask)));
1110 default:
1111 return 0;
1112 }
1113}
1114
1115static inline int cma_any_port(struct sockaddr *addr)
1116{
1117 return !cma_port(addr);
1118}
1119
1120static void cma_save_ib_info(struct sockaddr *src_addr,
1121 struct sockaddr *dst_addr,
1122 struct rdma_cm_id *listen_id,
1123 struct sa_path_rec *path)
1124{
1125 struct sockaddr_ib *listen_ib, *ib;
1126
1127 listen_ib = (struct sockaddr_ib *) &listen_id->route.addr.src_addr;
1128 if (src_addr) {
1129 ib = (struct sockaddr_ib *)src_addr;
1130 ib->sib_family = AF_IB;
1131 if (path) {
1132 ib->sib_pkey = path->pkey;
1133 ib->sib_flowinfo = path->flow_label;
1134 memcpy(&ib->sib_addr, &path->sgid, 16);
1135 ib->sib_sid = path->service_id;
1136 ib->sib_scope_id = 0;
1137 } else {
1138 ib->sib_pkey = listen_ib->sib_pkey;
1139 ib->sib_flowinfo = listen_ib->sib_flowinfo;
1140 ib->sib_addr = listen_ib->sib_addr;
1141 ib->sib_sid = listen_ib->sib_sid;
1142 ib->sib_scope_id = listen_ib->sib_scope_id;
1143 }
1144 ib->sib_sid_mask = cpu_to_be64(0xffffffffffffffffULL);
1145 }
1146 if (dst_addr) {
1147 ib = (struct sockaddr_ib *)dst_addr;
1148 ib->sib_family = AF_IB;
1149 if (path) {
1150 ib->sib_pkey = path->pkey;
1151 ib->sib_flowinfo = path->flow_label;
1152 memcpy(&ib->sib_addr, &path->dgid, 16);
1153 }
1154 }
1155}
1156
1157static void cma_save_ip4_info(struct sockaddr_in *src_addr,
1158 struct sockaddr_in *dst_addr,
1159 struct cma_hdr *hdr,
1160 __be16 local_port)
1161{
1162 if (src_addr) {
1163 *src_addr = (struct sockaddr_in) {
1164 .sin_family = AF_INET,
1165 .sin_addr.s_addr = hdr->dst_addr.ip4.addr,
1166 .sin_port = local_port,
1167 };
1168 }
1169
1170 if (dst_addr) {
1171 *dst_addr = (struct sockaddr_in) {
1172 .sin_family = AF_INET,
1173 .sin_addr.s_addr = hdr->src_addr.ip4.addr,
1174 .sin_port = hdr->port,
1175 };
1176 }
1177}
1178
1179static void cma_save_ip6_info(struct sockaddr_in6 *src_addr,
1180 struct sockaddr_in6 *dst_addr,
1181 struct cma_hdr *hdr,
1182 __be16 local_port)
1183{
1184 if (src_addr) {
1185 *src_addr = (struct sockaddr_in6) {
1186 .sin6_family = AF_INET6,
1187 .sin6_addr = hdr->dst_addr.ip6,
1188 .sin6_port = local_port,
1189 };
1190 }
1191
1192 if (dst_addr) {
1193 *dst_addr = (struct sockaddr_in6) {
1194 .sin6_family = AF_INET6,
1195 .sin6_addr = hdr->src_addr.ip6,
1196 .sin6_port = hdr->port,
1197 };
1198 }
1199}
1200
1201static u16 cma_port_from_service_id(__be64 service_id)
1202{
1203 return (u16)be64_to_cpu(service_id);
1204}
1205
1206static int cma_save_ip_info(struct sockaddr *src_addr,
1207 struct sockaddr *dst_addr,
1208 struct ib_cm_event *ib_event,
1209 __be64 service_id)
1210{
1211 struct cma_hdr *hdr;
1212 __be16 port;
1213
1214 hdr = ib_event->private_data;
1215 if (hdr->cma_version != CMA_VERSION)
1216 return -EINVAL;
1217
1218 port = htons(cma_port_from_service_id(service_id));
1219
1220 switch (cma_get_ip_ver(hdr)) {
1221 case 4:
1222 cma_save_ip4_info((struct sockaddr_in *)src_addr,
1223 (struct sockaddr_in *)dst_addr, hdr, port);
1224 break;
1225 case 6:
1226 cma_save_ip6_info((struct sockaddr_in6 *)src_addr,
1227 (struct sockaddr_in6 *)dst_addr, hdr, port);
1228 break;
1229 default:
1230 return -EAFNOSUPPORT;
1231 }
1232
1233 return 0;
1234}
1235
1236static int cma_save_net_info(struct sockaddr *src_addr,
1237 struct sockaddr *dst_addr,
1238 struct rdma_cm_id *listen_id,
1239 struct ib_cm_event *ib_event,
1240 sa_family_t sa_family, __be64 service_id)
1241{
1242 if (sa_family == AF_IB) {
1243 if (ib_event->event == IB_CM_REQ_RECEIVED)
1244 cma_save_ib_info(src_addr, dst_addr, listen_id,
1245 ib_event->param.req_rcvd.primary_path);
1246 else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED)
1247 cma_save_ib_info(src_addr, dst_addr, listen_id, NULL);
1248 return 0;
1249 }
1250
1251 return cma_save_ip_info(src_addr, dst_addr, ib_event, service_id);
1252}
1253
1254static int cma_save_req_info(const struct ib_cm_event *ib_event,
1255 struct cma_req_info *req)
1256{
1257 const struct ib_cm_req_event_param *req_param =
1258 &ib_event->param.req_rcvd;
1259 const struct ib_cm_sidr_req_event_param *sidr_param =
1260 &ib_event->param.sidr_req_rcvd;
1261
1262 switch (ib_event->event) {
1263 case IB_CM_REQ_RECEIVED:
1264 req->device = req_param->listen_id->device;
1265 req->port = req_param->port;
1266 memcpy(&req->local_gid, &req_param->primary_path->sgid,
1267 sizeof(req->local_gid));
1268 req->has_gid = true;
1269 req->service_id = req_param->primary_path->service_id;
1270 req->pkey = be16_to_cpu(req_param->primary_path->pkey);
1271 if (req->pkey != req_param->bth_pkey)
1272 pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and primary path P_Key (0x%x)\n"
1273 "RDMA CMA: in the future this may cause the request to be dropped\n",
1274 req_param->bth_pkey, req->pkey);
1275 break;
1276 case IB_CM_SIDR_REQ_RECEIVED:
1277 req->device = sidr_param->listen_id->device;
1278 req->port = sidr_param->port;
1279 req->has_gid = false;
1280 req->service_id = sidr_param->service_id;
1281 req->pkey = sidr_param->pkey;
1282 if (req->pkey != sidr_param->bth_pkey)
1283 pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and SIDR request payload P_Key (0x%x)\n"
1284 "RDMA CMA: in the future this may cause the request to be dropped\n",
1285 sidr_param->bth_pkey, req->pkey);
1286 break;
1287 default:
1288 return -EINVAL;
1289 }
1290
1291 return 0;
1292}
1293
1294static bool validate_ipv4_net_dev(struct net_device *net_dev,
1295 const struct sockaddr_in *dst_addr,
1296 const struct sockaddr_in *src_addr)
1297{
1298 __be32 daddr = dst_addr->sin_addr.s_addr,
1299 saddr = src_addr->sin_addr.s_addr;
1300 struct fib_result res;
1301 struct flowi4 fl4;
1302 int err;
1303 bool ret;
1304
1305 if (ipv4_is_multicast(saddr) || ipv4_is_lbcast(saddr) ||
1306 ipv4_is_lbcast(daddr) || ipv4_is_zeronet(saddr) ||
1307 ipv4_is_zeronet(daddr) || ipv4_is_loopback(daddr) ||
1308 ipv4_is_loopback(saddr))
1309 return false;
1310
1311 memset(&fl4, 0, sizeof(fl4));
1312 fl4.flowi4_iif = net_dev->ifindex;
1313 fl4.daddr = daddr;
1314 fl4.saddr = saddr;
1315
1316 rcu_read_lock();
1317 err = fib_lookup(dev_net(net_dev), &fl4, &res, 0);
1318 ret = err == 0 && FIB_RES_DEV(res) == net_dev;
1319 rcu_read_unlock();
1320
1321 return ret;
1322}
1323
1324static bool validate_ipv6_net_dev(struct net_device *net_dev,
1325 const struct sockaddr_in6 *dst_addr,
1326 const struct sockaddr_in6 *src_addr)
1327{
1328#if IS_ENABLED(CONFIG_IPV6)
1329 const int strict = ipv6_addr_type(&dst_addr->sin6_addr) &
1330 IPV6_ADDR_LINKLOCAL;
1331 struct rt6_info *rt = rt6_lookup(dev_net(net_dev), &dst_addr->sin6_addr,
1332 &src_addr->sin6_addr, net_dev->ifindex,
1333 strict);
1334 bool ret;
1335
1336 if (!rt)
1337 return false;
1338
1339 ret = rt->rt6i_idev->dev == net_dev;
1340 ip6_rt_put(rt);
1341
1342 return ret;
1343#else
1344 return false;
1345#endif
1346}
1347
1348static bool validate_net_dev(struct net_device *net_dev,
1349 const struct sockaddr *daddr,
1350 const struct sockaddr *saddr)
1351{
1352 const struct sockaddr_in *daddr4 = (const struct sockaddr_in *)daddr;
1353 const struct sockaddr_in *saddr4 = (const struct sockaddr_in *)saddr;
1354 const struct sockaddr_in6 *daddr6 = (const struct sockaddr_in6 *)daddr;
1355 const struct sockaddr_in6 *saddr6 = (const struct sockaddr_in6 *)saddr;
1356
1357 switch (daddr->sa_family) {
1358 case AF_INET:
1359 return saddr->sa_family == AF_INET &&
1360 validate_ipv4_net_dev(net_dev, daddr4, saddr4);
1361
1362 case AF_INET6:
1363 return saddr->sa_family == AF_INET6 &&
1364 validate_ipv6_net_dev(net_dev, daddr6, saddr6);
1365
1366 default:
1367 return false;
1368 }
1369}
1370
1371static struct net_device *cma_get_net_dev(struct ib_cm_event *ib_event,
1372 const struct cma_req_info *req)
1373{
1374 struct sockaddr_storage listen_addr_storage, src_addr_storage;
1375 struct sockaddr *listen_addr = (struct sockaddr *)&listen_addr_storage,
1376 *src_addr = (struct sockaddr *)&src_addr_storage;
1377 struct net_device *net_dev;
1378 const union ib_gid *gid = req->has_gid ? &req->local_gid : NULL;
1379 int err;
1380
1381 err = cma_save_ip_info(listen_addr, src_addr, ib_event,
1382 req->service_id);
1383 if (err)
1384 return ERR_PTR(err);
1385
1386 net_dev = ib_get_net_dev_by_params(req->device, req->port, req->pkey,
1387 gid, listen_addr);
1388 if (!net_dev)
1389 return ERR_PTR(-ENODEV);
1390
1391 if (!validate_net_dev(net_dev, listen_addr, src_addr)) {
1392 dev_put(net_dev);
1393 return ERR_PTR(-EHOSTUNREACH);
1394 }
1395
1396 return net_dev;
1397}
1398
1399static enum rdma_port_space rdma_ps_from_service_id(__be64 service_id)
1400{
1401 return (be64_to_cpu(service_id) >> 16) & 0xffff;
1402}
1403
1404static bool cma_match_private_data(struct rdma_id_private *id_priv,
1405 const struct cma_hdr *hdr)
1406{
1407 struct sockaddr *addr = cma_src_addr(id_priv);
1408 __be32 ip4_addr;
1409 struct in6_addr ip6_addr;
1410
1411 if (cma_any_addr(addr) && !id_priv->afonly)
1412 return true;
1413
1414 switch (addr->sa_family) {
1415 case AF_INET:
1416 ip4_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
1417 if (cma_get_ip_ver(hdr) != 4)
1418 return false;
1419 if (!cma_any_addr(addr) &&
1420 hdr->dst_addr.ip4.addr != ip4_addr)
1421 return false;
1422 break;
1423 case AF_INET6:
1424 ip6_addr = ((struct sockaddr_in6 *)addr)->sin6_addr;
1425 if (cma_get_ip_ver(hdr) != 6)
1426 return false;
1427 if (!cma_any_addr(addr) &&
1428 memcmp(&hdr->dst_addr.ip6, &ip6_addr, sizeof(ip6_addr)))
1429 return false;
1430 break;
1431 case AF_IB:
1432 return true;
1433 default:
1434 return false;
1435 }
1436
1437 return true;
1438}
1439
1440static bool cma_protocol_roce_dev_port(struct ib_device *device, int port_num)
1441{
1442 enum rdma_link_layer ll = rdma_port_get_link_layer(device, port_num);
1443 enum rdma_transport_type transport =
1444 rdma_node_get_transport(device->node_type);
1445
1446 return ll == IB_LINK_LAYER_ETHERNET && transport == RDMA_TRANSPORT_IB;
1447}
1448
1449static bool cma_protocol_roce(const struct rdma_cm_id *id)
1450{
1451 struct ib_device *device = id->device;
1452 const int port_num = id->port_num ?: rdma_start_port(device);
1453
1454 return cma_protocol_roce_dev_port(device, port_num);
1455}
1456
1457static bool cma_match_net_dev(const struct rdma_cm_id *id,
1458 const struct net_device *net_dev,
1459 u8 port_num)
1460{
1461 const struct rdma_addr *addr = &id->route.addr;
1462
1463 if (!net_dev)
1464
1465 return (!id->port_num || id->port_num == port_num) &&
1466 (addr->src_addr.ss_family == AF_IB ||
1467 cma_protocol_roce_dev_port(id->device, port_num));
1468
1469 return !addr->dev_addr.bound_dev_if ||
1470 (net_eq(dev_net(net_dev), addr->dev_addr.net) &&
1471 addr->dev_addr.bound_dev_if == net_dev->ifindex);
1472}
1473
1474static struct rdma_id_private *cma_find_listener(
1475 const struct rdma_bind_list *bind_list,
1476 const struct ib_cm_id *cm_id,
1477 const struct ib_cm_event *ib_event,
1478 const struct cma_req_info *req,
1479 const struct net_device *net_dev)
1480{
1481 struct rdma_id_private *id_priv, *id_priv_dev;
1482
1483 if (!bind_list)
1484 return ERR_PTR(-EINVAL);
1485
1486 hlist_for_each_entry(id_priv, &bind_list->owners, node) {
1487 if (cma_match_private_data(id_priv, ib_event->private_data)) {
1488 if (id_priv->id.device == cm_id->device &&
1489 cma_match_net_dev(&id_priv->id, net_dev, req->port))
1490 return id_priv;
1491 list_for_each_entry(id_priv_dev,
1492 &id_priv->listen_list,
1493 listen_list) {
1494 if (id_priv_dev->id.device == cm_id->device &&
1495 cma_match_net_dev(&id_priv_dev->id, net_dev, req->port))
1496 return id_priv_dev;
1497 }
1498 }
1499 }
1500
1501 return ERR_PTR(-EINVAL);
1502}
1503
1504static struct rdma_id_private *cma_id_from_event(struct ib_cm_id *cm_id,
1505 struct ib_cm_event *ib_event,
1506 struct net_device **net_dev)
1507{
1508 struct cma_req_info req;
1509 struct rdma_bind_list *bind_list;
1510 struct rdma_id_private *id_priv;
1511 int err;
1512
1513 err = cma_save_req_info(ib_event, &req);
1514 if (err)
1515 return ERR_PTR(err);
1516
1517 *net_dev = cma_get_net_dev(ib_event, &req);
1518 if (IS_ERR(*net_dev)) {
1519 if (PTR_ERR(*net_dev) == -EAFNOSUPPORT) {
1520
1521 *net_dev = NULL;
1522 } else if (cma_protocol_roce_dev_port(req.device, req.port)) {
1523
1524
1525 *net_dev = NULL;
1526 } else {
1527 return ERR_CAST(*net_dev);
1528 }
1529 }
1530
1531 bind_list = cma_ps_find(*net_dev ? dev_net(*net_dev) : &init_net,
1532 rdma_ps_from_service_id(req.service_id),
1533 cma_port_from_service_id(req.service_id));
1534 id_priv = cma_find_listener(bind_list, cm_id, ib_event, &req, *net_dev);
1535 if (IS_ERR(id_priv) && *net_dev) {
1536 dev_put(*net_dev);
1537 *net_dev = NULL;
1538 }
1539
1540 return id_priv;
1541}
1542
1543static inline int cma_user_data_offset(struct rdma_id_private *id_priv)
1544{
1545 return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr);
1546}
1547
1548static void cma_cancel_route(struct rdma_id_private *id_priv)
1549{
1550 if (rdma_cap_ib_sa(id_priv->id.device, id_priv->id.port_num)) {
1551 if (id_priv->query)
1552 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
1553 }
1554}
1555
1556static void cma_cancel_listens(struct rdma_id_private *id_priv)
1557{
1558 struct rdma_id_private *dev_id_priv;
1559
1560
1561
1562
1563
1564 mutex_lock(&lock);
1565 list_del(&id_priv->list);
1566
1567 while (!list_empty(&id_priv->listen_list)) {
1568 dev_id_priv = list_entry(id_priv->listen_list.next,
1569 struct rdma_id_private, listen_list);
1570
1571 list_del_init(&dev_id_priv->list);
1572 list_del(&dev_id_priv->listen_list);
1573 mutex_unlock(&lock);
1574
1575 rdma_destroy_id(&dev_id_priv->id);
1576 mutex_lock(&lock);
1577 }
1578 mutex_unlock(&lock);
1579}
1580
1581static void cma_cancel_operation(struct rdma_id_private *id_priv,
1582 enum rdma_cm_state state)
1583{
1584 switch (state) {
1585 case RDMA_CM_ADDR_QUERY:
1586 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
1587 break;
1588 case RDMA_CM_ROUTE_QUERY:
1589 cma_cancel_route(id_priv);
1590 break;
1591 case RDMA_CM_LISTEN:
1592 if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev)
1593 cma_cancel_listens(id_priv);
1594 break;
1595 default:
1596 break;
1597 }
1598}
1599
1600static void cma_release_port(struct rdma_id_private *id_priv)
1601{
1602 struct rdma_bind_list *bind_list = id_priv->bind_list;
1603 struct net *net = id_priv->id.route.addr.dev_addr.net;
1604
1605 if (!bind_list)
1606 return;
1607
1608 mutex_lock(&lock);
1609 hlist_del(&id_priv->node);
1610 if (hlist_empty(&bind_list->owners)) {
1611 cma_ps_remove(net, bind_list->ps, bind_list->port);
1612 kfree(bind_list);
1613 }
1614 mutex_unlock(&lock);
1615}
1616
1617static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
1618{
1619 struct cma_multicast *mc;
1620
1621 while (!list_empty(&id_priv->mc_list)) {
1622 mc = container_of(id_priv->mc_list.next,
1623 struct cma_multicast, list);
1624 list_del(&mc->list);
1625 if (rdma_cap_ib_mcast(id_priv->cma_dev->device,
1626 id_priv->id.port_num)) {
1627 ib_sa_free_multicast(mc->multicast.ib);
1628 kfree(mc);
1629 } else {
1630 if (mc->igmp_joined) {
1631 struct rdma_dev_addr *dev_addr =
1632 &id_priv->id.route.addr.dev_addr;
1633 struct net_device *ndev = NULL;
1634
1635 if (dev_addr->bound_dev_if)
1636 ndev = dev_get_by_index(&init_net,
1637 dev_addr->bound_dev_if);
1638 if (ndev) {
1639 cma_igmp_send(ndev,
1640 &mc->multicast.ib->rec.mgid,
1641 false);
1642 dev_put(ndev);
1643 }
1644 }
1645 kref_put(&mc->mcref, release_mc);
1646 }
1647 }
1648}
1649
1650void rdma_destroy_id(struct rdma_cm_id *id)
1651{
1652 struct rdma_id_private *id_priv;
1653 enum rdma_cm_state state;
1654
1655 id_priv = container_of(id, struct rdma_id_private, id);
1656 state = cma_exch(id_priv, RDMA_CM_DESTROYING);
1657 cma_cancel_operation(id_priv, state);
1658
1659
1660
1661
1662
1663 mutex_lock(&id_priv->handler_mutex);
1664 mutex_unlock(&id_priv->handler_mutex);
1665
1666 if (id_priv->cma_dev) {
1667 if (rdma_cap_ib_cm(id_priv->id.device, 1)) {
1668 if (id_priv->cm_id.ib)
1669 ib_destroy_cm_id(id_priv->cm_id.ib);
1670 } else if (rdma_cap_iw_cm(id_priv->id.device, 1)) {
1671 if (id_priv->cm_id.iw)
1672 iw_destroy_cm_id(id_priv->cm_id.iw);
1673 }
1674 cma_leave_mc_groups(id_priv);
1675 cma_release_dev(id_priv);
1676 }
1677
1678 cma_release_port(id_priv);
1679 cma_deref_id(id_priv);
1680 wait_for_completion(&id_priv->comp);
1681
1682 if (id_priv->internal_id)
1683 cma_deref_id(id_priv->id.context);
1684
1685 kfree(id_priv->id.route.path_rec);
1686 put_net(id_priv->id.route.addr.dev_addr.net);
1687 kfree(id_priv);
1688}
1689EXPORT_SYMBOL(rdma_destroy_id);
1690
1691static int cma_rep_recv(struct rdma_id_private *id_priv)
1692{
1693 int ret;
1694
1695 ret = cma_modify_qp_rtr(id_priv, NULL);
1696 if (ret)
1697 goto reject;
1698
1699 ret = cma_modify_qp_rts(id_priv, NULL);
1700 if (ret)
1701 goto reject;
1702
1703 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
1704 if (ret)
1705 goto reject;
1706
1707 return 0;
1708reject:
1709 pr_debug_ratelimited("RDMA CM: CONNECT_ERROR: failed to handle reply. status %d\n", ret);
1710 cma_modify_qp_err(id_priv);
1711 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
1712 NULL, 0, NULL, 0);
1713 return ret;
1714}
1715
1716static void cma_set_rep_event_data(struct rdma_cm_event *event,
1717 struct ib_cm_rep_event_param *rep_data,
1718 void *private_data)
1719{
1720 event->param.conn.private_data = private_data;
1721 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
1722 event->param.conn.responder_resources = rep_data->responder_resources;
1723 event->param.conn.initiator_depth = rep_data->initiator_depth;
1724 event->param.conn.flow_control = rep_data->flow_control;
1725 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
1726 event->param.conn.srq = rep_data->srq;
1727 event->param.conn.qp_num = rep_data->remote_qpn;
1728}
1729
1730static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1731{
1732 struct rdma_id_private *id_priv = cm_id->context;
1733 struct rdma_cm_event event;
1734 int ret = 0;
1735
1736 mutex_lock(&id_priv->handler_mutex);
1737 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
1738 id_priv->state != RDMA_CM_CONNECT) ||
1739 (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
1740 id_priv->state != RDMA_CM_DISCONNECT))
1741 goto out;
1742
1743 memset(&event, 0, sizeof event);
1744 switch (ib_event->event) {
1745 case IB_CM_REQ_ERROR:
1746 case IB_CM_REP_ERROR:
1747 event.event = RDMA_CM_EVENT_UNREACHABLE;
1748 event.status = -ETIMEDOUT;
1749 break;
1750 case IB_CM_REP_RECEIVED:
1751 if (cma_comp(id_priv, RDMA_CM_CONNECT) &&
1752 (id_priv->id.qp_type != IB_QPT_UD))
1753 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1754 if (id_priv->id.qp) {
1755 event.status = cma_rep_recv(id_priv);
1756 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1757 RDMA_CM_EVENT_ESTABLISHED;
1758 } else {
1759 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
1760 }
1761 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1762 ib_event->private_data);
1763 break;
1764 case IB_CM_RTU_RECEIVED:
1765 case IB_CM_USER_ESTABLISHED:
1766 event.event = RDMA_CM_EVENT_ESTABLISHED;
1767 break;
1768 case IB_CM_DREQ_ERROR:
1769 event.status = -ETIMEDOUT;
1770 case IB_CM_DREQ_RECEIVED:
1771 case IB_CM_DREP_RECEIVED:
1772 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
1773 RDMA_CM_DISCONNECT))
1774 goto out;
1775 event.event = RDMA_CM_EVENT_DISCONNECTED;
1776 break;
1777 case IB_CM_TIMEWAIT_EXIT:
1778 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1779 break;
1780 case IB_CM_MRA_RECEIVED:
1781
1782 goto out;
1783 case IB_CM_REJ_RECEIVED:
1784 pr_debug_ratelimited("RDMA CM: REJECTED: %s\n", rdma_reject_msg(&id_priv->id,
1785 ib_event->param.rej_rcvd.reason));
1786 cma_modify_qp_err(id_priv);
1787 event.status = ib_event->param.rej_rcvd.reason;
1788 event.event = RDMA_CM_EVENT_REJECTED;
1789 event.param.conn.private_data = ib_event->private_data;
1790 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
1791 break;
1792 default:
1793 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
1794 ib_event->event);
1795 goto out;
1796 }
1797
1798 ret = id_priv->id.event_handler(&id_priv->id, &event);
1799 if (ret) {
1800
1801 id_priv->cm_id.ib = NULL;
1802 cma_exch(id_priv, RDMA_CM_DESTROYING);
1803 mutex_unlock(&id_priv->handler_mutex);
1804 rdma_destroy_id(&id_priv->id);
1805 return ret;
1806 }
1807out:
1808 mutex_unlock(&id_priv->handler_mutex);
1809 return ret;
1810}
1811
1812static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
1813 struct ib_cm_event *ib_event,
1814 struct net_device *net_dev)
1815{
1816 struct rdma_id_private *id_priv;
1817 struct rdma_cm_id *id;
1818 struct rdma_route *rt;
1819 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
1820 struct sa_path_rec *path = ib_event->param.req_rcvd.primary_path;
1821 const __be64 service_id =
1822 ib_event->param.req_rcvd.primary_path->service_id;
1823 int ret;
1824
1825 id = rdma_create_id(listen_id->route.addr.dev_addr.net,
1826 listen_id->event_handler, listen_id->context,
1827 listen_id->ps, ib_event->param.req_rcvd.qp_type);
1828 if (IS_ERR(id))
1829 return NULL;
1830
1831 id_priv = container_of(id, struct rdma_id_private, id);
1832 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
1833 (struct sockaddr *)&id->route.addr.dst_addr,
1834 listen_id, ib_event, ss_family, service_id))
1835 goto err;
1836
1837 rt = &id->route;
1838 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
1839 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1840 GFP_KERNEL);
1841 if (!rt->path_rec)
1842 goto err;
1843
1844 rt->path_rec[0] = *path;
1845 if (rt->num_paths == 2)
1846 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1847
1848 if (net_dev) {
1849 ret = rdma_copy_addr(&rt->addr.dev_addr, net_dev, NULL);
1850 if (ret)
1851 goto err;
1852 } else {
1853 if (!cma_protocol_roce(listen_id) &&
1854 cma_any_addr(cma_src_addr(id_priv))) {
1855 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
1856 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
1857 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
1858 } else if (!cma_any_addr(cma_src_addr(id_priv))) {
1859 ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr);
1860 if (ret)
1861 goto err;
1862 }
1863 }
1864 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
1865
1866 id_priv->state = RDMA_CM_CONNECT;
1867 return id_priv;
1868
1869err:
1870 rdma_destroy_id(id);
1871 return NULL;
1872}
1873
1874static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1875 struct ib_cm_event *ib_event,
1876 struct net_device *net_dev)
1877{
1878 struct rdma_id_private *id_priv;
1879 struct rdma_cm_id *id;
1880 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
1881 struct net *net = listen_id->route.addr.dev_addr.net;
1882 int ret;
1883
1884 id = rdma_create_id(net, listen_id->event_handler, listen_id->context,
1885 listen_id->ps, IB_QPT_UD);
1886 if (IS_ERR(id))
1887 return NULL;
1888
1889 id_priv = container_of(id, struct rdma_id_private, id);
1890 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
1891 (struct sockaddr *)&id->route.addr.dst_addr,
1892 listen_id, ib_event, ss_family,
1893 ib_event->param.sidr_req_rcvd.service_id))
1894 goto err;
1895
1896 if (net_dev) {
1897 ret = rdma_copy_addr(&id->route.addr.dev_addr, net_dev, NULL);
1898 if (ret)
1899 goto err;
1900 } else {
1901 if (!cma_any_addr(cma_src_addr(id_priv))) {
1902 ret = cma_translate_addr(cma_src_addr(id_priv),
1903 &id->route.addr.dev_addr);
1904 if (ret)
1905 goto err;
1906 }
1907 }
1908
1909 id_priv->state = RDMA_CM_CONNECT;
1910 return id_priv;
1911err:
1912 rdma_destroy_id(id);
1913 return NULL;
1914}
1915
1916static void cma_set_req_event_data(struct rdma_cm_event *event,
1917 struct ib_cm_req_event_param *req_data,
1918 void *private_data, int offset)
1919{
1920 event->param.conn.private_data = private_data + offset;
1921 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1922 event->param.conn.responder_resources = req_data->responder_resources;
1923 event->param.conn.initiator_depth = req_data->initiator_depth;
1924 event->param.conn.flow_control = req_data->flow_control;
1925 event->param.conn.retry_count = req_data->retry_count;
1926 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1927 event->param.conn.srq = req_data->srq;
1928 event->param.conn.qp_num = req_data->remote_qpn;
1929}
1930
1931static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event)
1932{
1933 return (((ib_event->event == IB_CM_REQ_RECEIVED) &&
1934 (ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
1935 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
1936 (id->qp_type == IB_QPT_UD)) ||
1937 (!id->qp_type));
1938}
1939
1940static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1941{
1942 struct rdma_id_private *listen_id, *conn_id = NULL;
1943 struct rdma_cm_event event;
1944 struct net_device *net_dev;
1945 int offset, ret;
1946
1947 listen_id = cma_id_from_event(cm_id, ib_event, &net_dev);
1948 if (IS_ERR(listen_id))
1949 return PTR_ERR(listen_id);
1950
1951 if (!cma_check_req_qp_type(&listen_id->id, ib_event)) {
1952 ret = -EINVAL;
1953 goto net_dev_put;
1954 }
1955
1956 mutex_lock(&listen_id->handler_mutex);
1957 if (listen_id->state != RDMA_CM_LISTEN) {
1958 ret = -ECONNABORTED;
1959 goto err1;
1960 }
1961
1962 memset(&event, 0, sizeof event);
1963 offset = cma_user_data_offset(listen_id);
1964 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1965 if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
1966 conn_id = cma_new_udp_id(&listen_id->id, ib_event, net_dev);
1967 event.param.ud.private_data = ib_event->private_data + offset;
1968 event.param.ud.private_data_len =
1969 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1970 } else {
1971 conn_id = cma_new_conn_id(&listen_id->id, ib_event, net_dev);
1972 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1973 ib_event->private_data, offset);
1974 }
1975 if (!conn_id) {
1976 ret = -ENOMEM;
1977 goto err1;
1978 }
1979
1980 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1981 ret = cma_acquire_dev(conn_id, listen_id);
1982 if (ret)
1983 goto err2;
1984
1985 conn_id->cm_id.ib = cm_id;
1986 cm_id->context = conn_id;
1987 cm_id->cm_handler = cma_ib_handler;
1988
1989
1990
1991
1992
1993 atomic_inc(&conn_id->refcount);
1994 ret = conn_id->id.event_handler(&conn_id->id, &event);
1995 if (ret)
1996 goto err3;
1997
1998
1999
2000
2001 mutex_lock(&lock);
2002 if (cma_comp(conn_id, RDMA_CM_CONNECT) &&
2003 (conn_id->id.qp_type != IB_QPT_UD))
2004 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
2005 mutex_unlock(&lock);
2006 mutex_unlock(&conn_id->handler_mutex);
2007 mutex_unlock(&listen_id->handler_mutex);
2008 cma_deref_id(conn_id);
2009 if (net_dev)
2010 dev_put(net_dev);
2011 return 0;
2012
2013err3:
2014 cma_deref_id(conn_id);
2015
2016 conn_id->cm_id.ib = NULL;
2017err2:
2018 cma_exch(conn_id, RDMA_CM_DESTROYING);
2019 mutex_unlock(&conn_id->handler_mutex);
2020err1:
2021 mutex_unlock(&listen_id->handler_mutex);
2022 if (conn_id)
2023 rdma_destroy_id(&conn_id->id);
2024
2025net_dev_put:
2026 if (net_dev)
2027 dev_put(net_dev);
2028
2029 return ret;
2030}
2031
2032__be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr)
2033{
2034 if (addr->sa_family == AF_IB)
2035 return ((struct sockaddr_ib *) addr)->sib_sid;
2036
2037 return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr)));
2038}
2039EXPORT_SYMBOL(rdma_get_service_id);
2040
2041static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
2042{
2043 struct rdma_id_private *id_priv = iw_id->context;
2044 struct rdma_cm_event event;
2045 int ret = 0;
2046 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
2047 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
2048
2049 mutex_lock(&id_priv->handler_mutex);
2050 if (id_priv->state != RDMA_CM_CONNECT)
2051 goto out;
2052
2053 memset(&event, 0, sizeof event);
2054 switch (iw_event->event) {
2055 case IW_CM_EVENT_CLOSE:
2056 event.event = RDMA_CM_EVENT_DISCONNECTED;
2057 break;
2058 case IW_CM_EVENT_CONNECT_REPLY:
2059 memcpy(cma_src_addr(id_priv), laddr,
2060 rdma_addr_size(laddr));
2061 memcpy(cma_dst_addr(id_priv), raddr,
2062 rdma_addr_size(raddr));
2063 switch (iw_event->status) {
2064 case 0:
2065 event.event = RDMA_CM_EVENT_ESTABLISHED;
2066 event.param.conn.initiator_depth = iw_event->ird;
2067 event.param.conn.responder_resources = iw_event->ord;
2068 break;
2069 case -ECONNRESET:
2070 case -ECONNREFUSED:
2071 event.event = RDMA_CM_EVENT_REJECTED;
2072 break;
2073 case -ETIMEDOUT:
2074 event.event = RDMA_CM_EVENT_UNREACHABLE;
2075 break;
2076 default:
2077 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
2078 break;
2079 }
2080 break;
2081 case IW_CM_EVENT_ESTABLISHED:
2082 event.event = RDMA_CM_EVENT_ESTABLISHED;
2083 event.param.conn.initiator_depth = iw_event->ird;
2084 event.param.conn.responder_resources = iw_event->ord;
2085 break;
2086 default:
2087 BUG_ON(1);
2088 }
2089
2090 event.status = iw_event->status;
2091 event.param.conn.private_data = iw_event->private_data;
2092 event.param.conn.private_data_len = iw_event->private_data_len;
2093 ret = id_priv->id.event_handler(&id_priv->id, &event);
2094 if (ret) {
2095
2096 id_priv->cm_id.iw = NULL;
2097 cma_exch(id_priv, RDMA_CM_DESTROYING);
2098 mutex_unlock(&id_priv->handler_mutex);
2099 rdma_destroy_id(&id_priv->id);
2100 return ret;
2101 }
2102
2103out:
2104 mutex_unlock(&id_priv->handler_mutex);
2105 return ret;
2106}
2107
2108static int iw_conn_req_handler(struct iw_cm_id *cm_id,
2109 struct iw_cm_event *iw_event)
2110{
2111 struct rdma_cm_id *new_cm_id;
2112 struct rdma_id_private *listen_id, *conn_id;
2113 struct rdma_cm_event event;
2114 int ret = -ECONNABORTED;
2115 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
2116 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
2117
2118 listen_id = cm_id->context;
2119
2120 mutex_lock(&listen_id->handler_mutex);
2121 if (listen_id->state != RDMA_CM_LISTEN)
2122 goto out;
2123
2124
2125 new_cm_id = rdma_create_id(listen_id->id.route.addr.dev_addr.net,
2126 listen_id->id.event_handler,
2127 listen_id->id.context,
2128 RDMA_PS_TCP, IB_QPT_RC);
2129 if (IS_ERR(new_cm_id)) {
2130 ret = -ENOMEM;
2131 goto out;
2132 }
2133 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
2134 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
2135 conn_id->state = RDMA_CM_CONNECT;
2136
2137 ret = rdma_translate_ip(laddr, &conn_id->id.route.addr.dev_addr, NULL);
2138 if (ret) {
2139 mutex_unlock(&conn_id->handler_mutex);
2140 rdma_destroy_id(new_cm_id);
2141 goto out;
2142 }
2143
2144 ret = cma_acquire_dev(conn_id, listen_id);
2145 if (ret) {
2146 mutex_unlock(&conn_id->handler_mutex);
2147 rdma_destroy_id(new_cm_id);
2148 goto out;
2149 }
2150
2151 conn_id->cm_id.iw = cm_id;
2152 cm_id->context = conn_id;
2153 cm_id->cm_handler = cma_iw_handler;
2154
2155 memcpy(cma_src_addr(conn_id), laddr, rdma_addr_size(laddr));
2156 memcpy(cma_dst_addr(conn_id), raddr, rdma_addr_size(raddr));
2157
2158 memset(&event, 0, sizeof event);
2159 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
2160 event.param.conn.private_data = iw_event->private_data;
2161 event.param.conn.private_data_len = iw_event->private_data_len;
2162 event.param.conn.initiator_depth = iw_event->ird;
2163 event.param.conn.responder_resources = iw_event->ord;
2164
2165
2166
2167
2168
2169 atomic_inc(&conn_id->refcount);
2170 ret = conn_id->id.event_handler(&conn_id->id, &event);
2171 if (ret) {
2172
2173 conn_id->cm_id.iw = NULL;
2174 cma_exch(conn_id, RDMA_CM_DESTROYING);
2175 mutex_unlock(&conn_id->handler_mutex);
2176 cma_deref_id(conn_id);
2177 rdma_destroy_id(&conn_id->id);
2178 goto out;
2179 }
2180
2181 mutex_unlock(&conn_id->handler_mutex);
2182 cma_deref_id(conn_id);
2183
2184out:
2185 mutex_unlock(&listen_id->handler_mutex);
2186 return ret;
2187}
2188
2189static int cma_ib_listen(struct rdma_id_private *id_priv)
2190{
2191 struct sockaddr *addr;
2192 struct ib_cm_id *id;
2193 __be64 svc_id;
2194
2195 addr = cma_src_addr(id_priv);
2196 svc_id = rdma_get_service_id(&id_priv->id, addr);
2197 id = ib_cm_insert_listen(id_priv->id.device, cma_req_handler, svc_id);
2198 if (IS_ERR(id))
2199 return PTR_ERR(id);
2200 id_priv->cm_id.ib = id;
2201
2202 return 0;
2203}
2204
2205static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
2206{
2207 int ret;
2208 struct iw_cm_id *id;
2209
2210 id = iw_create_cm_id(id_priv->id.device,
2211 iw_conn_req_handler,
2212 id_priv);
2213 if (IS_ERR(id))
2214 return PTR_ERR(id);
2215
2216 id->tos = id_priv->tos;
2217 id_priv->cm_id.iw = id;
2218
2219 memcpy(&id_priv->cm_id.iw->local_addr, cma_src_addr(id_priv),
2220 rdma_addr_size(cma_src_addr(id_priv)));
2221
2222 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
2223
2224 if (ret) {
2225 iw_destroy_cm_id(id_priv->cm_id.iw);
2226 id_priv->cm_id.iw = NULL;
2227 }
2228
2229 return ret;
2230}
2231
2232static int cma_listen_handler(struct rdma_cm_id *id,
2233 struct rdma_cm_event *event)
2234{
2235 struct rdma_id_private *id_priv = id->context;
2236
2237 id->context = id_priv->id.context;
2238 id->event_handler = id_priv->id.event_handler;
2239 return id_priv->id.event_handler(id, event);
2240}
2241
2242static void cma_listen_on_dev(struct rdma_id_private *id_priv,
2243 struct cma_device *cma_dev)
2244{
2245 struct rdma_id_private *dev_id_priv;
2246 struct rdma_cm_id *id;
2247 struct net *net = id_priv->id.route.addr.dev_addr.net;
2248 int ret;
2249
2250 if (cma_family(id_priv) == AF_IB && !rdma_cap_ib_cm(cma_dev->device, 1))
2251 return;
2252
2253 id = rdma_create_id(net, cma_listen_handler, id_priv, id_priv->id.ps,
2254 id_priv->id.qp_type);
2255 if (IS_ERR(id))
2256 return;
2257
2258 dev_id_priv = container_of(id, struct rdma_id_private, id);
2259
2260 dev_id_priv->state = RDMA_CM_ADDR_BOUND;
2261 memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv),
2262 rdma_addr_size(cma_src_addr(id_priv)));
2263
2264 _cma_attach_to_dev(dev_id_priv, cma_dev);
2265 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
2266 atomic_inc(&id_priv->refcount);
2267 dev_id_priv->internal_id = 1;
2268 dev_id_priv->afonly = id_priv->afonly;
2269
2270 ret = rdma_listen(id, id_priv->backlog);
2271 if (ret)
2272 pr_warn("RDMA CMA: cma_listen_on_dev, error %d, listening on device %s\n",
2273 ret, cma_dev->device->name);
2274}
2275
2276static void cma_listen_on_all(struct rdma_id_private *id_priv)
2277{
2278 struct cma_device *cma_dev;
2279
2280 mutex_lock(&lock);
2281 list_add_tail(&id_priv->list, &listen_any_list);
2282 list_for_each_entry(cma_dev, &dev_list, list)
2283 cma_listen_on_dev(id_priv, cma_dev);
2284 mutex_unlock(&lock);
2285}
2286
2287void rdma_set_service_type(struct rdma_cm_id *id, int tos)
2288{
2289 struct rdma_id_private *id_priv;
2290
2291 id_priv = container_of(id, struct rdma_id_private, id);
2292 id_priv->tos = (u8) tos;
2293 id_priv->tos_set = true;
2294}
2295EXPORT_SYMBOL(rdma_set_service_type);
2296
2297static void cma_query_handler(int status, struct sa_path_rec *path_rec,
2298 void *context)
2299{
2300 struct cma_work *work = context;
2301 struct rdma_route *route;
2302
2303 route = &work->id->id.route;
2304
2305 if (!status) {
2306 route->num_paths = 1;
2307 *route->path_rec = *path_rec;
2308 } else {
2309 work->old_state = RDMA_CM_ROUTE_QUERY;
2310 work->new_state = RDMA_CM_ADDR_RESOLVED;
2311 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
2312 work->event.status = status;
2313 pr_debug_ratelimited("RDMA CM: ROUTE_ERROR: failed to query path. status %d\n",
2314 status);
2315 }
2316
2317 queue_work(cma_wq, &work->work);
2318}
2319
2320static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
2321 struct cma_work *work)
2322{
2323 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2324 struct sa_path_rec path_rec;
2325 ib_sa_comp_mask comp_mask;
2326 struct sockaddr_in6 *sin6;
2327 struct sockaddr_ib *sib;
2328
2329 memset(&path_rec, 0, sizeof path_rec);
2330
2331 if (rdma_cap_opa_ah(id_priv->id.device, id_priv->id.port_num))
2332 path_rec.rec_type = SA_PATH_REC_TYPE_OPA;
2333 else
2334 path_rec.rec_type = SA_PATH_REC_TYPE_IB;
2335 rdma_addr_get_sgid(dev_addr, &path_rec.sgid);
2336 rdma_addr_get_dgid(dev_addr, &path_rec.dgid);
2337 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
2338 path_rec.numb_path = 1;
2339 path_rec.reversible = 1;
2340 path_rec.service_id = rdma_get_service_id(&id_priv->id,
2341 cma_dst_addr(id_priv));
2342
2343 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
2344 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
2345 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
2346
2347 switch (cma_family(id_priv)) {
2348 case AF_INET:
2349 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
2350 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
2351 break;
2352 case AF_INET6:
2353 sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
2354 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
2355 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2356 break;
2357 case AF_IB:
2358 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
2359 path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20);
2360 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2361 break;
2362 }
2363
2364 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
2365 id_priv->id.port_num, &path_rec,
2366 comp_mask, timeout_ms,
2367 GFP_KERNEL, cma_query_handler,
2368 work, &id_priv->query);
2369
2370 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
2371}
2372
2373static void cma_work_handler(struct work_struct *_work)
2374{
2375 struct cma_work *work = container_of(_work, struct cma_work, work);
2376 struct rdma_id_private *id_priv = work->id;
2377 int destroy = 0;
2378
2379 mutex_lock(&id_priv->handler_mutex);
2380 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
2381 goto out;
2382
2383 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
2384 cma_exch(id_priv, RDMA_CM_DESTROYING);
2385 destroy = 1;
2386 }
2387out:
2388 mutex_unlock(&id_priv->handler_mutex);
2389 cma_deref_id(id_priv);
2390 if (destroy)
2391 rdma_destroy_id(&id_priv->id);
2392 kfree(work);
2393}
2394
2395static void cma_ndev_work_handler(struct work_struct *_work)
2396{
2397 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
2398 struct rdma_id_private *id_priv = work->id;
2399 int destroy = 0;
2400
2401 mutex_lock(&id_priv->handler_mutex);
2402 if (id_priv->state == RDMA_CM_DESTROYING ||
2403 id_priv->state == RDMA_CM_DEVICE_REMOVAL)
2404 goto out;
2405
2406 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
2407 cma_exch(id_priv, RDMA_CM_DESTROYING);
2408 destroy = 1;
2409 }
2410
2411out:
2412 mutex_unlock(&id_priv->handler_mutex);
2413 cma_deref_id(id_priv);
2414 if (destroy)
2415 rdma_destroy_id(&id_priv->id);
2416 kfree(work);
2417}
2418
2419static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
2420{
2421 struct rdma_route *route = &id_priv->id.route;
2422 struct cma_work *work;
2423 int ret;
2424
2425 work = kzalloc(sizeof *work, GFP_KERNEL);
2426 if (!work)
2427 return -ENOMEM;
2428
2429 work->id = id_priv;
2430 INIT_WORK(&work->work, cma_work_handler);
2431 work->old_state = RDMA_CM_ROUTE_QUERY;
2432 work->new_state = RDMA_CM_ROUTE_RESOLVED;
2433 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2434
2435 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
2436 if (!route->path_rec) {
2437 ret = -ENOMEM;
2438 goto err1;
2439 }
2440
2441 ret = cma_query_ib_route(id_priv, timeout_ms, work);
2442 if (ret)
2443 goto err2;
2444
2445 return 0;
2446err2:
2447 kfree(route->path_rec);
2448 route->path_rec = NULL;
2449err1:
2450 kfree(work);
2451 return ret;
2452}
2453
2454int rdma_set_ib_paths(struct rdma_cm_id *id,
2455 struct sa_path_rec *path_rec, int num_paths)
2456{
2457 struct rdma_id_private *id_priv;
2458 int ret;
2459
2460 id_priv = container_of(id, struct rdma_id_private, id);
2461 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2462 RDMA_CM_ROUTE_RESOLVED))
2463 return -EINVAL;
2464
2465 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths,
2466 GFP_KERNEL);
2467 if (!id->route.path_rec) {
2468 ret = -ENOMEM;
2469 goto err;
2470 }
2471
2472 id->route.num_paths = num_paths;
2473 return 0;
2474err:
2475 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
2476 return ret;
2477}
2478EXPORT_SYMBOL(rdma_set_ib_paths);
2479
2480static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
2481{
2482 struct cma_work *work;
2483
2484 work = kzalloc(sizeof *work, GFP_KERNEL);
2485 if (!work)
2486 return -ENOMEM;
2487
2488 work->id = id_priv;
2489 INIT_WORK(&work->work, cma_work_handler);
2490 work->old_state = RDMA_CM_ROUTE_QUERY;
2491 work->new_state = RDMA_CM_ROUTE_RESOLVED;
2492 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2493 queue_work(cma_wq, &work->work);
2494 return 0;
2495}
2496
2497static int iboe_tos_to_sl(struct net_device *ndev, int tos)
2498{
2499 int prio;
2500 struct net_device *dev;
2501
2502 prio = rt_tos2priority(tos);
2503 dev = is_vlan_dev(ndev) ? vlan_dev_real_dev(ndev) : ndev;
2504 if (dev->num_tc)
2505 return netdev_get_prio_tc_map(dev, prio);
2506
2507#if IS_ENABLED(CONFIG_VLAN_8021Q)
2508 if (is_vlan_dev(ndev))
2509 return (vlan_dev_get_egress_qos_mask(ndev, prio) &
2510 VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
2511#endif
2512 return 0;
2513}
2514
2515static enum ib_gid_type cma_route_gid_type(enum rdma_network_type network_type,
2516 unsigned long supported_gids,
2517 enum ib_gid_type default_gid)
2518{
2519 if ((network_type == RDMA_NETWORK_IPV4 ||
2520 network_type == RDMA_NETWORK_IPV6) &&
2521 test_bit(IB_GID_TYPE_ROCE_UDP_ENCAP, &supported_gids))
2522 return IB_GID_TYPE_ROCE_UDP_ENCAP;
2523
2524 return default_gid;
2525}
2526
2527static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
2528{
2529 struct rdma_route *route = &id_priv->id.route;
2530 struct rdma_addr *addr = &route->addr;
2531 struct cma_work *work;
2532 int ret;
2533 struct net_device *ndev = NULL;
2534 enum ib_gid_type gid_type = IB_GID_TYPE_IB;
2535 u8 default_roce_tos = id_priv->cma_dev->default_roce_tos[id_priv->id.port_num -
2536 rdma_start_port(id_priv->cma_dev->device)];
2537 u8 tos = id_priv->tos_set ? id_priv->tos : default_roce_tos;
2538
2539
2540 work = kzalloc(sizeof *work, GFP_KERNEL);
2541 if (!work)
2542 return -ENOMEM;
2543
2544 work->id = id_priv;
2545 INIT_WORK(&work->work, cma_work_handler);
2546
2547 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
2548 if (!route->path_rec) {
2549 ret = -ENOMEM;
2550 goto err1;
2551 }
2552
2553 route->num_paths = 1;
2554
2555 if (addr->dev_addr.bound_dev_if) {
2556 unsigned long supported_gids;
2557
2558 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if);
2559 if (!ndev) {
2560 ret = -ENODEV;
2561 goto err2;
2562 }
2563
2564 supported_gids = roce_gid_type_mask_support(id_priv->id.device,
2565 id_priv->id.port_num);
2566 gid_type = cma_route_gid_type(addr->dev_addr.network,
2567 supported_gids,
2568 id_priv->gid_type);
2569 route->path_rec->rec_type =
2570 sa_conv_gid_to_pathrec_type(gid_type);
2571 sa_path_set_ndev(route->path_rec, &init_net);
2572 sa_path_set_ifindex(route->path_rec, ndev->ifindex);
2573 }
2574 if (!ndev) {
2575 ret = -ENODEV;
2576 goto err2;
2577 }
2578
2579 sa_path_set_dmac(route->path_rec, addr->dev_addr.dst_dev_addr);
2580
2581 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
2582 &route->path_rec->sgid);
2583 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.dst_addr,
2584 &route->path_rec->dgid);
2585
2586
2587 if (gid_type < ib_network_to_gid_type(addr->dev_addr.network))
2588 gid_type = ib_network_to_gid_type(addr->dev_addr.network);
2589 route->path_rec->rec_type = sa_conv_gid_to_pathrec_type(gid_type);
2590
2591 if (((struct sockaddr *)&id_priv->id.route.addr.dst_addr)->sa_family != AF_IB)
2592
2593 route->path_rec->hop_limit = addr->dev_addr.hoplimit;
2594 else
2595 route->path_rec->hop_limit = 1;
2596 route->path_rec->reversible = 1;
2597 route->path_rec->pkey = cpu_to_be16(0xffff);
2598 route->path_rec->mtu_selector = IB_SA_EQ;
2599 route->path_rec->sl = iboe_tos_to_sl(ndev, tos);
2600 route->path_rec->traffic_class = tos;
2601 route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
2602 route->path_rec->rate_selector = IB_SA_EQ;
2603 route->path_rec->rate = iboe_get_rate(ndev);
2604 dev_put(ndev);
2605 route->path_rec->packet_life_time_selector = IB_SA_EQ;
2606 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
2607 if (!route->path_rec->mtu) {
2608 ret = -EINVAL;
2609 goto err2;
2610 }
2611
2612 work->old_state = RDMA_CM_ROUTE_QUERY;
2613 work->new_state = RDMA_CM_ROUTE_RESOLVED;
2614 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2615 work->event.status = 0;
2616
2617 queue_work(cma_wq, &work->work);
2618
2619 return 0;
2620
2621err2:
2622 kfree(route->path_rec);
2623 route->path_rec = NULL;
2624err1:
2625 kfree(work);
2626 return ret;
2627}
2628
2629int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
2630{
2631 struct rdma_id_private *id_priv;
2632 int ret;
2633
2634 id_priv = container_of(id, struct rdma_id_private, id);
2635 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
2636 return -EINVAL;
2637
2638 atomic_inc(&id_priv->refcount);
2639 if (rdma_cap_ib_sa(id->device, id->port_num))
2640 ret = cma_resolve_ib_route(id_priv, timeout_ms);
2641 else if (rdma_protocol_roce(id->device, id->port_num))
2642 ret = cma_resolve_iboe_route(id_priv);
2643 else if (rdma_protocol_iwarp(id->device, id->port_num))
2644 ret = cma_resolve_iw_route(id_priv, timeout_ms);
2645 else
2646 ret = -ENOSYS;
2647
2648 if (ret)
2649 goto err;
2650
2651 return 0;
2652err:
2653 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
2654 cma_deref_id(id_priv);
2655 return ret;
2656}
2657EXPORT_SYMBOL(rdma_resolve_route);
2658
2659static void cma_set_loopback(struct sockaddr *addr)
2660{
2661 switch (addr->sa_family) {
2662 case AF_INET:
2663 ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
2664 break;
2665 case AF_INET6:
2666 ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr,
2667 0, 0, 0, htonl(1));
2668 break;
2669 default:
2670 ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr,
2671 0, 0, 0, htonl(1));
2672 break;
2673 }
2674}
2675
2676static int cma_bind_loopback(struct rdma_id_private *id_priv)
2677{
2678 struct cma_device *cma_dev, *cur_dev;
2679 union ib_gid gid;
2680 enum ib_port_state port_state;
2681 u16 pkey;
2682 int ret;
2683 u8 p;
2684
2685 cma_dev = NULL;
2686 mutex_lock(&lock);
2687 list_for_each_entry(cur_dev, &dev_list, list) {
2688 if (cma_family(id_priv) == AF_IB &&
2689 !rdma_cap_ib_cm(cur_dev->device, 1))
2690 continue;
2691
2692 if (!cma_dev)
2693 cma_dev = cur_dev;
2694
2695 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
2696 if (!ib_get_cached_port_state(cur_dev->device, p, &port_state) &&
2697 port_state == IB_PORT_ACTIVE) {
2698 cma_dev = cur_dev;
2699 goto port_found;
2700 }
2701 }
2702 }
2703
2704 if (!cma_dev) {
2705 ret = -ENODEV;
2706 goto out;
2707 }
2708
2709 p = 1;
2710
2711port_found:
2712 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid, NULL);
2713 if (ret)
2714 goto out;
2715
2716 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
2717 if (ret)
2718 goto out;
2719
2720 id_priv->id.route.addr.dev_addr.dev_type =
2721 (rdma_protocol_ib(cma_dev->device, p)) ?
2722 ARPHRD_INFINIBAND : ARPHRD_ETHER;
2723
2724 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2725 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
2726 id_priv->id.port_num = p;
2727 cma_attach_to_dev(id_priv, cma_dev);
2728 cma_set_loopback(cma_src_addr(id_priv));
2729out:
2730 mutex_unlock(&lock);
2731 return ret;
2732}
2733
2734static void addr_handler(int status, struct sockaddr *src_addr,
2735 struct rdma_dev_addr *dev_addr, void *context)
2736{
2737 struct rdma_id_private *id_priv = context;
2738 struct rdma_cm_event event;
2739
2740 memset(&event, 0, sizeof event);
2741 mutex_lock(&id_priv->handler_mutex);
2742 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
2743 RDMA_CM_ADDR_RESOLVED))
2744 goto out;
2745
2746 memcpy(cma_src_addr(id_priv), src_addr, rdma_addr_size(src_addr));
2747 if (!status && !id_priv->cma_dev) {
2748 status = cma_acquire_dev(id_priv, NULL);
2749 if (status)
2750 pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to acquire device. status %d\n",
2751 status);
2752 } else {
2753 pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to resolve IP. status %d\n", status);
2754 }
2755
2756 if (status) {
2757 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2758 RDMA_CM_ADDR_BOUND))
2759 goto out;
2760 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2761 event.status = status;
2762 } else
2763 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2764
2765 if (id_priv->id.event_handler(&id_priv->id, &event)) {
2766 cma_exch(id_priv, RDMA_CM_DESTROYING);
2767 mutex_unlock(&id_priv->handler_mutex);
2768 cma_deref_id(id_priv);
2769 rdma_destroy_id(&id_priv->id);
2770 return;
2771 }
2772out:
2773 mutex_unlock(&id_priv->handler_mutex);
2774 cma_deref_id(id_priv);
2775}
2776
2777static int cma_resolve_loopback(struct rdma_id_private *id_priv)
2778{
2779 struct cma_work *work;
2780 union ib_gid gid;
2781 int ret;
2782
2783 work = kzalloc(sizeof *work, GFP_KERNEL);
2784 if (!work)
2785 return -ENOMEM;
2786
2787 if (!id_priv->cma_dev) {
2788 ret = cma_bind_loopback(id_priv);
2789 if (ret)
2790 goto err;
2791 }
2792
2793 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2794 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
2795
2796 work->id = id_priv;
2797 INIT_WORK(&work->work, cma_work_handler);
2798 work->old_state = RDMA_CM_ADDR_QUERY;
2799 work->new_state = RDMA_CM_ADDR_RESOLVED;
2800 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2801 queue_work(cma_wq, &work->work);
2802 return 0;
2803err:
2804 kfree(work);
2805 return ret;
2806}
2807
2808static int cma_resolve_ib_addr(struct rdma_id_private *id_priv)
2809{
2810 struct cma_work *work;
2811 int ret;
2812
2813 work = kzalloc(sizeof *work, GFP_KERNEL);
2814 if (!work)
2815 return -ENOMEM;
2816
2817 if (!id_priv->cma_dev) {
2818 ret = cma_resolve_ib_dev(id_priv);
2819 if (ret)
2820 goto err;
2821 }
2822
2823 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *)
2824 &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr));
2825
2826 work->id = id_priv;
2827 INIT_WORK(&work->work, cma_work_handler);
2828 work->old_state = RDMA_CM_ADDR_QUERY;
2829 work->new_state = RDMA_CM_ADDR_RESOLVED;
2830 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2831 queue_work(cma_wq, &work->work);
2832 return 0;
2833err:
2834 kfree(work);
2835 return ret;
2836}
2837
2838static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2839 struct sockaddr *dst_addr)
2840{
2841 if (!src_addr || !src_addr->sa_family) {
2842 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
2843 src_addr->sa_family = dst_addr->sa_family;
2844 if (IS_ENABLED(CONFIG_IPV6) &&
2845 dst_addr->sa_family == AF_INET6) {
2846 struct sockaddr_in6 *src_addr6 = (struct sockaddr_in6 *) src_addr;
2847 struct sockaddr_in6 *dst_addr6 = (struct sockaddr_in6 *) dst_addr;
2848 src_addr6->sin6_scope_id = dst_addr6->sin6_scope_id;
2849 if (ipv6_addr_type(&dst_addr6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
2850 id->route.addr.dev_addr.bound_dev_if = dst_addr6->sin6_scope_id;
2851 } else if (dst_addr->sa_family == AF_IB) {
2852 ((struct sockaddr_ib *) src_addr)->sib_pkey =
2853 ((struct sockaddr_ib *) dst_addr)->sib_pkey;
2854 }
2855 }
2856 return rdma_bind_addr(id, src_addr);
2857}
2858
2859int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2860 struct sockaddr *dst_addr, int timeout_ms)
2861{
2862 struct rdma_id_private *id_priv;
2863 int ret;
2864
2865 id_priv = container_of(id, struct rdma_id_private, id);
2866 memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr));
2867 if (id_priv->state == RDMA_CM_IDLE) {
2868 ret = cma_bind_addr(id, src_addr, dst_addr);
2869 if (ret) {
2870 memset(cma_dst_addr(id_priv), 0, rdma_addr_size(dst_addr));
2871 return ret;
2872 }
2873 }
2874
2875 if (cma_family(id_priv) != dst_addr->sa_family) {
2876 memset(cma_dst_addr(id_priv), 0, rdma_addr_size(dst_addr));
2877 return -EINVAL;
2878 }
2879
2880 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY)) {
2881 memset(cma_dst_addr(id_priv), 0, rdma_addr_size(dst_addr));
2882 return -EINVAL;
2883 }
2884
2885 atomic_inc(&id_priv->refcount);
2886 if (cma_any_addr(dst_addr)) {
2887 ret = cma_resolve_loopback(id_priv);
2888 } else {
2889 if (dst_addr->sa_family == AF_IB) {
2890 ret = cma_resolve_ib_addr(id_priv);
2891 } else {
2892 ret = rdma_resolve_ip(&addr_client, cma_src_addr(id_priv),
2893 dst_addr, &id->route.addr.dev_addr,
2894 timeout_ms, addr_handler, id_priv);
2895 }
2896 }
2897 if (ret)
2898 goto err;
2899
2900 return 0;
2901err:
2902 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
2903 cma_deref_id(id_priv);
2904 return ret;
2905}
2906EXPORT_SYMBOL(rdma_resolve_addr);
2907
2908int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
2909{
2910 struct rdma_id_private *id_priv;
2911 unsigned long flags;
2912 int ret;
2913
2914 id_priv = container_of(id, struct rdma_id_private, id);
2915 spin_lock_irqsave(&id_priv->lock, flags);
2916 if (reuse || id_priv->state == RDMA_CM_IDLE) {
2917 id_priv->reuseaddr = reuse;
2918 ret = 0;
2919 } else {
2920 ret = -EINVAL;
2921 }
2922 spin_unlock_irqrestore(&id_priv->lock, flags);
2923 return ret;
2924}
2925EXPORT_SYMBOL(rdma_set_reuseaddr);
2926
2927int rdma_set_afonly(struct rdma_cm_id *id, int afonly)
2928{
2929 struct rdma_id_private *id_priv;
2930 unsigned long flags;
2931 int ret;
2932
2933 id_priv = container_of(id, struct rdma_id_private, id);
2934 spin_lock_irqsave(&id_priv->lock, flags);
2935 if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) {
2936 id_priv->options |= (1 << CMA_OPTION_AFONLY);
2937 id_priv->afonly = afonly;
2938 ret = 0;
2939 } else {
2940 ret = -EINVAL;
2941 }
2942 spin_unlock_irqrestore(&id_priv->lock, flags);
2943 return ret;
2944}
2945EXPORT_SYMBOL(rdma_set_afonly);
2946
2947static void cma_bind_port(struct rdma_bind_list *bind_list,
2948 struct rdma_id_private *id_priv)
2949{
2950 struct sockaddr *addr;
2951 struct sockaddr_ib *sib;
2952 u64 sid, mask;
2953 __be16 port;
2954
2955 addr = cma_src_addr(id_priv);
2956 port = htons(bind_list->port);
2957
2958 switch (addr->sa_family) {
2959 case AF_INET:
2960 ((struct sockaddr_in *) addr)->sin_port = port;
2961 break;
2962 case AF_INET6:
2963 ((struct sockaddr_in6 *) addr)->sin6_port = port;
2964 break;
2965 case AF_IB:
2966 sib = (struct sockaddr_ib *) addr;
2967 sid = be64_to_cpu(sib->sib_sid);
2968 mask = be64_to_cpu(sib->sib_sid_mask);
2969 sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port));
2970 sib->sib_sid_mask = cpu_to_be64(~0ULL);
2971 break;
2972 }
2973 id_priv->bind_list = bind_list;
2974 hlist_add_head(&id_priv->node, &bind_list->owners);
2975}
2976
2977static int cma_alloc_port(enum rdma_port_space ps,
2978 struct rdma_id_private *id_priv, unsigned short snum)
2979{
2980 struct rdma_bind_list *bind_list;
2981 int ret;
2982
2983 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
2984 if (!bind_list)
2985 return -ENOMEM;
2986
2987 ret = cma_ps_alloc(id_priv->id.route.addr.dev_addr.net, ps, bind_list,
2988 snum);
2989 if (ret < 0)
2990 goto err;
2991
2992 bind_list->ps = ps;
2993 bind_list->port = (unsigned short)ret;
2994 cma_bind_port(bind_list, id_priv);
2995 return 0;
2996err:
2997 kfree(bind_list);
2998 return ret == -ENOSPC ? -EADDRNOTAVAIL : ret;
2999}
3000
3001static int cma_port_is_unique(struct rdma_bind_list *bind_list,
3002 struct rdma_id_private *id_priv)
3003{
3004 struct rdma_id_private *cur_id;
3005 struct sockaddr *daddr = cma_dst_addr(id_priv);
3006 struct sockaddr *saddr = cma_src_addr(id_priv);
3007 __be16 dport = cma_port(daddr);
3008
3009 hlist_for_each_entry(cur_id, &bind_list->owners, node) {
3010 struct sockaddr *cur_daddr = cma_dst_addr(cur_id);
3011 struct sockaddr *cur_saddr = cma_src_addr(cur_id);
3012 __be16 cur_dport = cma_port(cur_daddr);
3013
3014 if (id_priv == cur_id)
3015 continue;
3016
3017
3018 if (!cma_any_port(cur_daddr) &&
3019 (dport != cur_dport))
3020 continue;
3021
3022
3023 if (!cma_any_addr(saddr) &&
3024 !cma_any_addr(cur_saddr) &&
3025 cma_addr_cmp(saddr, cur_saddr))
3026 continue;
3027
3028
3029 if (!cma_any_addr(cur_daddr) &&
3030 cma_addr_cmp(daddr, cur_daddr))
3031 continue;
3032
3033 return -EADDRNOTAVAIL;
3034 }
3035 return 0;
3036}
3037
3038static int cma_alloc_any_port(enum rdma_port_space ps,
3039 struct rdma_id_private *id_priv)
3040{
3041 static unsigned int last_used_port;
3042 int low, high, remaining;
3043 unsigned int rover;
3044 struct net *net = id_priv->id.route.addr.dev_addr.net;
3045
3046 inet_get_local_port_range(net, &low, &high);
3047 remaining = (high - low) + 1;
3048 rover = prandom_u32() % remaining + low;
3049retry:
3050 if (last_used_port != rover) {
3051 struct rdma_bind_list *bind_list;
3052 int ret;
3053
3054 bind_list = cma_ps_find(net, ps, (unsigned short)rover);
3055
3056 if (!bind_list) {
3057 ret = cma_alloc_port(ps, id_priv, rover);
3058 } else {
3059 ret = cma_port_is_unique(bind_list, id_priv);
3060 if (!ret)
3061 cma_bind_port(bind_list, id_priv);
3062 }
3063
3064
3065
3066
3067 if (!ret)
3068 last_used_port = rover;
3069 if (ret != -EADDRNOTAVAIL)
3070 return ret;
3071 }
3072 if (--remaining) {
3073 rover++;
3074 if ((rover < low) || (rover > high))
3075 rover = low;
3076 goto retry;
3077 }
3078 return -EADDRNOTAVAIL;
3079}
3080
3081
3082
3083
3084
3085
3086
3087static int cma_check_port(struct rdma_bind_list *bind_list,
3088 struct rdma_id_private *id_priv, uint8_t reuseaddr)
3089{
3090 struct rdma_id_private *cur_id;
3091 struct sockaddr *addr, *cur_addr;
3092
3093 addr = cma_src_addr(id_priv);
3094 hlist_for_each_entry(cur_id, &bind_list->owners, node) {
3095 if (id_priv == cur_id)
3096 continue;
3097
3098 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr &&
3099 cur_id->reuseaddr)
3100 continue;
3101
3102 cur_addr = cma_src_addr(cur_id);
3103 if (id_priv->afonly && cur_id->afonly &&
3104 (addr->sa_family != cur_addr->sa_family))
3105 continue;
3106
3107 if (cma_any_addr(addr) || cma_any_addr(cur_addr))
3108 return -EADDRNOTAVAIL;
3109
3110 if (!cma_addr_cmp(addr, cur_addr))
3111 return -EADDRINUSE;
3112 }
3113 return 0;
3114}
3115
3116static int cma_use_port(enum rdma_port_space ps,
3117 struct rdma_id_private *id_priv)
3118{
3119 struct rdma_bind_list *bind_list;
3120 unsigned short snum;
3121 int ret;
3122
3123 snum = ntohs(cma_port(cma_src_addr(id_priv)));
3124 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
3125 return -EACCES;
3126
3127 bind_list = cma_ps_find(id_priv->id.route.addr.dev_addr.net, ps, snum);
3128 if (!bind_list) {
3129 ret = cma_alloc_port(ps, id_priv, snum);
3130 } else {
3131 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
3132 if (!ret)
3133 cma_bind_port(bind_list, id_priv);
3134 }
3135 return ret;
3136}
3137
3138static int cma_bind_listen(struct rdma_id_private *id_priv)
3139{
3140 struct rdma_bind_list *bind_list = id_priv->bind_list;
3141 int ret = 0;
3142
3143 mutex_lock(&lock);
3144 if (bind_list->owners.first->next)
3145 ret = cma_check_port(bind_list, id_priv, 0);
3146 mutex_unlock(&lock);
3147 return ret;
3148}
3149
3150static enum rdma_port_space cma_select_inet_ps(
3151 struct rdma_id_private *id_priv)
3152{
3153 switch (id_priv->id.ps) {
3154 case RDMA_PS_TCP:
3155 case RDMA_PS_UDP:
3156 case RDMA_PS_IPOIB:
3157 case RDMA_PS_IB:
3158 return id_priv->id.ps;
3159 default:
3160
3161 return 0;
3162 }
3163}
3164
3165static enum rdma_port_space cma_select_ib_ps(struct rdma_id_private *id_priv)
3166{
3167 enum rdma_port_space ps = 0;
3168 struct sockaddr_ib *sib;
3169 u64 sid_ps, mask, sid;
3170
3171 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
3172 mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK;
3173 sid = be64_to_cpu(sib->sib_sid) & mask;
3174
3175 if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) {
3176 sid_ps = RDMA_IB_IP_PS_IB;
3177 ps = RDMA_PS_IB;
3178 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) &&
3179 (sid == (RDMA_IB_IP_PS_TCP & mask))) {
3180 sid_ps = RDMA_IB_IP_PS_TCP;
3181 ps = RDMA_PS_TCP;
3182 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) &&
3183 (sid == (RDMA_IB_IP_PS_UDP & mask))) {
3184 sid_ps = RDMA_IB_IP_PS_UDP;
3185 ps = RDMA_PS_UDP;
3186 }
3187
3188 if (ps) {
3189 sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib)));
3190 sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK |
3191 be64_to_cpu(sib->sib_sid_mask));
3192 }
3193 return ps;
3194}
3195
3196static int cma_get_port(struct rdma_id_private *id_priv)
3197{
3198 enum rdma_port_space ps;
3199 int ret;
3200
3201 if (cma_family(id_priv) != AF_IB)
3202 ps = cma_select_inet_ps(id_priv);
3203 else
3204 ps = cma_select_ib_ps(id_priv);
3205 if (!ps)
3206 return -EPROTONOSUPPORT;
3207
3208 mutex_lock(&lock);
3209 if (cma_any_port(cma_src_addr(id_priv)))
3210 ret = cma_alloc_any_port(ps, id_priv);
3211 else
3212 ret = cma_use_port(ps, id_priv);
3213 mutex_unlock(&lock);
3214
3215 return ret;
3216}
3217
3218static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
3219 struct sockaddr *addr)
3220{
3221#if IS_ENABLED(CONFIG_IPV6)
3222 struct sockaddr_in6 *sin6;
3223
3224 if (addr->sa_family != AF_INET6)
3225 return 0;
3226
3227 sin6 = (struct sockaddr_in6 *) addr;
3228
3229 if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL))
3230 return 0;
3231
3232 if (!sin6->sin6_scope_id)
3233 return -EINVAL;
3234
3235 dev_addr->bound_dev_if = sin6->sin6_scope_id;
3236#endif
3237 return 0;
3238}
3239
3240int rdma_listen(struct rdma_cm_id *id, int backlog)
3241{
3242 struct rdma_id_private *id_priv;
3243 int ret;
3244
3245 id_priv = container_of(id, struct rdma_id_private, id);
3246 if (id_priv->state == RDMA_CM_IDLE) {
3247 id->route.addr.src_addr.ss_family = AF_INET;
3248 ret = rdma_bind_addr(id, cma_src_addr(id_priv));
3249 if (ret)
3250 return ret;
3251 }
3252
3253 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
3254 return -EINVAL;
3255
3256 if (id_priv->reuseaddr) {
3257 ret = cma_bind_listen(id_priv);
3258 if (ret)
3259 goto err;
3260 }
3261
3262 id_priv->backlog = backlog;
3263 if (id->device) {
3264 if (rdma_cap_ib_cm(id->device, 1)) {
3265 ret = cma_ib_listen(id_priv);
3266 if (ret)
3267 goto err;
3268 } else if (rdma_cap_iw_cm(id->device, 1)) {
3269 ret = cma_iw_listen(id_priv, backlog);
3270 if (ret)
3271 goto err;
3272 } else {
3273 ret = -ENOSYS;
3274 goto err;
3275 }
3276 } else
3277 cma_listen_on_all(id_priv);
3278
3279 return 0;
3280err:
3281 id_priv->backlog = 0;
3282 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
3283 return ret;
3284}
3285EXPORT_SYMBOL(rdma_listen);
3286
3287int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
3288{
3289 struct rdma_id_private *id_priv;
3290 int ret;
3291 struct sockaddr *daddr;
3292
3293 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 &&
3294 addr->sa_family != AF_IB)
3295 return -EAFNOSUPPORT;
3296
3297 id_priv = container_of(id, struct rdma_id_private, id);
3298 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
3299 return -EINVAL;
3300
3301 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
3302 if (ret)
3303 goto err1;
3304
3305 memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr));
3306 if (!cma_any_addr(addr)) {
3307 ret = cma_translate_addr(addr, &id->route.addr.dev_addr);
3308 if (ret)
3309 goto err1;
3310
3311 ret = cma_acquire_dev(id_priv, NULL);
3312 if (ret)
3313 goto err1;
3314 }
3315
3316 if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) {
3317 if (addr->sa_family == AF_INET)
3318 id_priv->afonly = 1;
3319#if IS_ENABLED(CONFIG_IPV6)
3320 else if (addr->sa_family == AF_INET6) {
3321 struct net *net = id_priv->id.route.addr.dev_addr.net;
3322
3323 id_priv->afonly = net->ipv6.sysctl.bindv6only;
3324 }
3325#endif
3326 }
3327 ret = cma_get_port(id_priv);
3328 if (ret)
3329 goto err2;
3330
3331 daddr = cma_dst_addr(id_priv);
3332 daddr->sa_family = addr->sa_family;
3333
3334 return 0;
3335err2:
3336 if (id_priv->cma_dev)
3337 cma_release_dev(id_priv);
3338err1:
3339 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
3340 return ret;
3341}
3342EXPORT_SYMBOL(rdma_bind_addr);
3343
3344static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv)
3345{
3346 struct cma_hdr *cma_hdr;
3347
3348 cma_hdr = hdr;
3349 cma_hdr->cma_version = CMA_VERSION;
3350 if (cma_family(id_priv) == AF_INET) {
3351 struct sockaddr_in *src4, *dst4;
3352
3353 src4 = (struct sockaddr_in *) cma_src_addr(id_priv);
3354 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv);
3355
3356 cma_set_ip_ver(cma_hdr, 4);
3357 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
3358 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
3359 cma_hdr->port = src4->sin_port;
3360 } else if (cma_family(id_priv) == AF_INET6) {
3361 struct sockaddr_in6 *src6, *dst6;
3362
3363 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
3364 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv);
3365
3366 cma_set_ip_ver(cma_hdr, 6);
3367 cma_hdr->src_addr.ip6 = src6->sin6_addr;
3368 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
3369 cma_hdr->port = src6->sin6_port;
3370 }
3371 return 0;
3372}
3373
3374static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
3375 struct ib_cm_event *ib_event)
3376{
3377 struct rdma_id_private *id_priv = cm_id->context;
3378 struct rdma_cm_event event;
3379 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
3380 int ret = 0;
3381
3382 mutex_lock(&id_priv->handler_mutex);
3383 if (id_priv->state != RDMA_CM_CONNECT)
3384 goto out;
3385
3386 memset(&event, 0, sizeof event);
3387 switch (ib_event->event) {
3388 case IB_CM_SIDR_REQ_ERROR:
3389 event.event = RDMA_CM_EVENT_UNREACHABLE;
3390 event.status = -ETIMEDOUT;
3391 break;
3392 case IB_CM_SIDR_REP_RECEIVED:
3393 event.param.ud.private_data = ib_event->private_data;
3394 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
3395 if (rep->status != IB_SIDR_SUCCESS) {
3396 event.event = RDMA_CM_EVENT_UNREACHABLE;
3397 event.status = ib_event->param.sidr_rep_rcvd.status;
3398 pr_debug_ratelimited("RDMA CM: UNREACHABLE: bad SIDR reply. status %d\n",
3399 event.status);
3400 break;
3401 }
3402 ret = cma_set_qkey(id_priv, rep->qkey);
3403 if (ret) {
3404 pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to set qkey. status %d\n", ret);
3405 event.event = RDMA_CM_EVENT_ADDR_ERROR;
3406 event.status = ret;
3407 break;
3408 }
3409 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
3410 id_priv->id.route.path_rec,
3411 &event.param.ud.ah_attr);
3412 event.param.ud.qp_num = rep->qpn;
3413 event.param.ud.qkey = rep->qkey;
3414 event.event = RDMA_CM_EVENT_ESTABLISHED;
3415 event.status = 0;
3416 break;
3417 default:
3418 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
3419 ib_event->event);
3420 goto out;
3421 }
3422
3423 ret = id_priv->id.event_handler(&id_priv->id, &event);
3424 if (ret) {
3425
3426 id_priv->cm_id.ib = NULL;
3427 cma_exch(id_priv, RDMA_CM_DESTROYING);
3428 mutex_unlock(&id_priv->handler_mutex);
3429 rdma_destroy_id(&id_priv->id);
3430 return ret;
3431 }
3432out:
3433 mutex_unlock(&id_priv->handler_mutex);
3434 return ret;
3435}
3436
3437static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
3438 struct rdma_conn_param *conn_param)
3439{
3440 struct ib_cm_sidr_req_param req;
3441 struct ib_cm_id *id;
3442 void *private_data;
3443 int offset, ret;
3444
3445 memset(&req, 0, sizeof req);
3446 offset = cma_user_data_offset(id_priv);
3447 req.private_data_len = offset + conn_param->private_data_len;
3448 if (req.private_data_len < conn_param->private_data_len)
3449 return -EINVAL;
3450
3451 if (req.private_data_len) {
3452 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3453 if (!private_data)
3454 return -ENOMEM;
3455 } else {
3456 private_data = NULL;
3457 }
3458
3459 if (conn_param->private_data && conn_param->private_data_len)
3460 memcpy(private_data + offset, conn_param->private_data,
3461 conn_param->private_data_len);
3462
3463 if (private_data) {
3464 ret = cma_format_hdr(private_data, id_priv);
3465 if (ret)
3466 goto out;
3467 req.private_data = private_data;
3468 }
3469
3470 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
3471 id_priv);
3472 if (IS_ERR(id)) {
3473 ret = PTR_ERR(id);
3474 goto out;
3475 }
3476 id_priv->cm_id.ib = id;
3477
3478 req.path = id_priv->id.route.path_rec;
3479 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
3480 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
3481 req.max_cm_retries = CMA_MAX_CM_RETRIES;
3482
3483 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
3484 if (ret) {
3485 ib_destroy_cm_id(id_priv->cm_id.ib);
3486 id_priv->cm_id.ib = NULL;
3487 }
3488out:
3489 kfree(private_data);
3490 return ret;
3491}
3492
3493static int cma_connect_ib(struct rdma_id_private *id_priv,
3494 struct rdma_conn_param *conn_param)
3495{
3496 struct ib_cm_req_param req;
3497 struct rdma_route *route;
3498 void *private_data;
3499 struct ib_cm_id *id;
3500 int offset, ret;
3501
3502 memset(&req, 0, sizeof req);
3503 offset = cma_user_data_offset(id_priv);
3504 req.private_data_len = offset + conn_param->private_data_len;
3505 if (req.private_data_len < conn_param->private_data_len)
3506 return -EINVAL;
3507
3508 if (req.private_data_len) {
3509 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3510 if (!private_data)
3511 return -ENOMEM;
3512 } else {
3513 private_data = NULL;
3514 }
3515
3516 if (conn_param->private_data && conn_param->private_data_len)
3517 memcpy(private_data + offset, conn_param->private_data,
3518 conn_param->private_data_len);
3519
3520 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
3521 if (IS_ERR(id)) {
3522 ret = PTR_ERR(id);
3523 goto out;
3524 }
3525 id_priv->cm_id.ib = id;
3526
3527 route = &id_priv->id.route;
3528 if (private_data) {
3529 ret = cma_format_hdr(private_data, id_priv);
3530 if (ret)
3531 goto out;
3532 req.private_data = private_data;
3533 }
3534
3535 req.primary_path = &route->path_rec[0];
3536 if (route->num_paths == 2)
3537 req.alternate_path = &route->path_rec[1];
3538
3539 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
3540 req.qp_num = id_priv->qp_num;
3541 req.qp_type = id_priv->id.qp_type;
3542 req.starting_psn = id_priv->seq_num;
3543 req.responder_resources = conn_param->responder_resources;
3544 req.initiator_depth = conn_param->initiator_depth;
3545 req.flow_control = conn_param->flow_control;
3546 req.retry_count = min_t(u8, 7, conn_param->retry_count);
3547 req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
3548 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3549 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3550 req.max_cm_retries = CMA_MAX_CM_RETRIES;
3551 req.srq = id_priv->srq ? 1 : 0;
3552
3553 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
3554out:
3555 if (ret && !IS_ERR(id)) {
3556 ib_destroy_cm_id(id);
3557 id_priv->cm_id.ib = NULL;
3558 }
3559
3560 kfree(private_data);
3561 return ret;
3562}
3563
3564static int cma_connect_iw(struct rdma_id_private *id_priv,
3565 struct rdma_conn_param *conn_param)
3566{
3567 struct iw_cm_id *cm_id;
3568 int ret;
3569 struct iw_cm_conn_param iw_param;
3570
3571 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
3572 if (IS_ERR(cm_id))
3573 return PTR_ERR(cm_id);
3574
3575 cm_id->tos = id_priv->tos;
3576 id_priv->cm_id.iw = cm_id;
3577
3578 memcpy(&cm_id->local_addr, cma_src_addr(id_priv),
3579 rdma_addr_size(cma_src_addr(id_priv)));
3580 memcpy(&cm_id->remote_addr, cma_dst_addr(id_priv),
3581 rdma_addr_size(cma_dst_addr(id_priv)));
3582
3583 ret = cma_modify_qp_rtr(id_priv, conn_param);
3584 if (ret)
3585 goto out;
3586
3587 if (conn_param) {
3588 iw_param.ord = conn_param->initiator_depth;
3589 iw_param.ird = conn_param->responder_resources;
3590 iw_param.private_data = conn_param->private_data;
3591 iw_param.private_data_len = conn_param->private_data_len;
3592 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
3593 } else {
3594 memset(&iw_param, 0, sizeof iw_param);
3595 iw_param.qpn = id_priv->qp_num;
3596 }
3597 ret = iw_cm_connect(cm_id, &iw_param);
3598out:
3599 if (ret) {
3600 iw_destroy_cm_id(cm_id);
3601 id_priv->cm_id.iw = NULL;
3602 }
3603 return ret;
3604}
3605
3606int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
3607{
3608 struct rdma_id_private *id_priv;
3609 int ret;
3610
3611 id_priv = container_of(id, struct rdma_id_private, id);
3612 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
3613 return -EINVAL;
3614
3615 if (!id->qp) {
3616 id_priv->qp_num = conn_param->qp_num;
3617 id_priv->srq = conn_param->srq;
3618 }
3619
3620 if (rdma_cap_ib_cm(id->device, id->port_num)) {
3621 if (id->qp_type == IB_QPT_UD)
3622 ret = cma_resolve_ib_udp(id_priv, conn_param);
3623 else
3624 ret = cma_connect_ib(id_priv, conn_param);
3625 } else if (rdma_cap_iw_cm(id->device, id->port_num))
3626 ret = cma_connect_iw(id_priv, conn_param);
3627 else
3628 ret = -ENOSYS;
3629 if (ret)
3630 goto err;
3631
3632 return 0;
3633err:
3634 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
3635 return ret;
3636}
3637EXPORT_SYMBOL(rdma_connect);
3638
3639static int cma_accept_ib(struct rdma_id_private *id_priv,
3640 struct rdma_conn_param *conn_param)
3641{
3642 struct ib_cm_rep_param rep;
3643 int ret;
3644
3645 ret = cma_modify_qp_rtr(id_priv, conn_param);
3646 if (ret)
3647 goto out;
3648
3649 ret = cma_modify_qp_rts(id_priv, conn_param);
3650 if (ret)
3651 goto out;
3652
3653 memset(&rep, 0, sizeof rep);
3654 rep.qp_num = id_priv->qp_num;
3655 rep.starting_psn = id_priv->seq_num;
3656 rep.private_data = conn_param->private_data;
3657 rep.private_data_len = conn_param->private_data_len;
3658 rep.responder_resources = conn_param->responder_resources;
3659 rep.initiator_depth = conn_param->initiator_depth;
3660 rep.failover_accepted = 0;
3661 rep.flow_control = conn_param->flow_control;
3662 rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
3663 rep.srq = id_priv->srq ? 1 : 0;
3664
3665 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
3666out:
3667 return ret;
3668}
3669
3670static int cma_accept_iw(struct rdma_id_private *id_priv,
3671 struct rdma_conn_param *conn_param)
3672{
3673 struct iw_cm_conn_param iw_param;
3674 int ret;
3675
3676 if (!conn_param)
3677 return -EINVAL;
3678
3679 ret = cma_modify_qp_rtr(id_priv, conn_param);
3680 if (ret)
3681 return ret;
3682
3683 iw_param.ord = conn_param->initiator_depth;
3684 iw_param.ird = conn_param->responder_resources;
3685 iw_param.private_data = conn_param->private_data;
3686 iw_param.private_data_len = conn_param->private_data_len;
3687 if (id_priv->id.qp) {
3688 iw_param.qpn = id_priv->qp_num;
3689 } else
3690 iw_param.qpn = conn_param->qp_num;
3691
3692 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
3693}
3694
3695static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
3696 enum ib_cm_sidr_status status, u32 qkey,
3697 const void *private_data, int private_data_len)
3698{
3699 struct ib_cm_sidr_rep_param rep;
3700 int ret;
3701
3702 memset(&rep, 0, sizeof rep);
3703 rep.status = status;
3704 if (status == IB_SIDR_SUCCESS) {
3705 ret = cma_set_qkey(id_priv, qkey);
3706 if (ret)
3707 return ret;
3708 rep.qp_num = id_priv->qp_num;
3709 rep.qkey = id_priv->qkey;
3710 }
3711 rep.private_data = private_data;
3712 rep.private_data_len = private_data_len;
3713
3714 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
3715}
3716
3717int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
3718{
3719 struct rdma_id_private *id_priv;
3720 int ret;
3721
3722 id_priv = container_of(id, struct rdma_id_private, id);
3723
3724 id_priv->owner = task_pid_nr(current);
3725
3726 if (!cma_comp(id_priv, RDMA_CM_CONNECT))
3727 return -EINVAL;
3728
3729 if (!id->qp && conn_param) {
3730 id_priv->qp_num = conn_param->qp_num;
3731 id_priv->srq = conn_param->srq;
3732 }
3733
3734 if (rdma_cap_ib_cm(id->device, id->port_num)) {
3735 if (id->qp_type == IB_QPT_UD) {
3736 if (conn_param)
3737 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
3738 conn_param->qkey,
3739 conn_param->private_data,
3740 conn_param->private_data_len);
3741 else
3742 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
3743 0, NULL, 0);
3744 } else {
3745 if (conn_param)
3746 ret = cma_accept_ib(id_priv, conn_param);
3747 else
3748 ret = cma_rep_recv(id_priv);
3749 }
3750 } else if (rdma_cap_iw_cm(id->device, id->port_num))
3751 ret = cma_accept_iw(id_priv, conn_param);
3752 else
3753 ret = -ENOSYS;
3754
3755 if (ret)
3756 goto reject;
3757
3758 return 0;
3759reject:
3760 cma_modify_qp_err(id_priv);
3761 rdma_reject(id, NULL, 0);
3762 return ret;
3763}
3764EXPORT_SYMBOL(rdma_accept);
3765
3766int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
3767{
3768 struct rdma_id_private *id_priv;
3769 int ret;
3770
3771 id_priv = container_of(id, struct rdma_id_private, id);
3772 if (!id_priv->cm_id.ib)
3773 return -EINVAL;
3774
3775 switch (id->device->node_type) {
3776 case RDMA_NODE_IB_CA:
3777 ret = ib_cm_notify(id_priv->cm_id.ib, event);
3778 break;
3779 default:
3780 ret = 0;
3781 break;
3782 }
3783 return ret;
3784}
3785EXPORT_SYMBOL(rdma_notify);
3786
3787int rdma_reject(struct rdma_cm_id *id, const void *private_data,
3788 u8 private_data_len)
3789{
3790 struct rdma_id_private *id_priv;
3791 int ret;
3792
3793 id_priv = container_of(id, struct rdma_id_private, id);
3794 if (!id_priv->cm_id.ib)
3795 return -EINVAL;
3796
3797 if (rdma_cap_ib_cm(id->device, id->port_num)) {
3798 if (id->qp_type == IB_QPT_UD)
3799 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0,
3800 private_data, private_data_len);
3801 else
3802 ret = ib_send_cm_rej(id_priv->cm_id.ib,
3803 IB_CM_REJ_CONSUMER_DEFINED, NULL,
3804 0, private_data, private_data_len);
3805 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
3806 ret = iw_cm_reject(id_priv->cm_id.iw,
3807 private_data, private_data_len);
3808 } else
3809 ret = -ENOSYS;
3810
3811 return ret;
3812}
3813EXPORT_SYMBOL(rdma_reject);
3814
3815int rdma_disconnect(struct rdma_cm_id *id)
3816{
3817 struct rdma_id_private *id_priv;
3818 int ret;
3819
3820 id_priv = container_of(id, struct rdma_id_private, id);
3821 if (!id_priv->cm_id.ib)
3822 return -EINVAL;
3823
3824 if (rdma_cap_ib_cm(id->device, id->port_num)) {
3825 ret = cma_modify_qp_err(id_priv);
3826 if (ret)
3827 goto out;
3828
3829 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
3830 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
3831 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
3832 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
3833 } else
3834 ret = -EINVAL;
3835
3836out:
3837 return ret;
3838}
3839EXPORT_SYMBOL(rdma_disconnect);
3840
3841static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
3842{
3843 struct rdma_id_private *id_priv;
3844 struct cma_multicast *mc = multicast->context;
3845 struct rdma_cm_event event;
3846 int ret = 0;
3847
3848 id_priv = mc->id_priv;
3849 mutex_lock(&id_priv->handler_mutex);
3850 if (id_priv->state != RDMA_CM_ADDR_BOUND &&
3851 id_priv->state != RDMA_CM_ADDR_RESOLVED)
3852 goto out;
3853
3854 if (!status)
3855 status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey));
3856 else
3857 pr_debug_ratelimited("RDMA CM: MULTICAST_ERROR: failed to join multicast. status %d\n",
3858 status);
3859 mutex_lock(&id_priv->qp_mutex);
3860 if (!status && id_priv->id.qp) {
3861 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
3862 be16_to_cpu(multicast->rec.mlid));
3863 if (status)
3864 pr_debug_ratelimited("RDMA CM: MULTICAST_ERROR: failed to attach QP. status %d\n",
3865 status);
3866 }
3867 mutex_unlock(&id_priv->qp_mutex);
3868
3869 memset(&event, 0, sizeof event);
3870 event.status = status;
3871 event.param.ud.private_data = mc->context;
3872 if (!status) {
3873 struct rdma_dev_addr *dev_addr =
3874 &id_priv->id.route.addr.dev_addr;
3875 struct net_device *ndev =
3876 dev_get_by_index(&init_net, dev_addr->bound_dev_if);
3877 enum ib_gid_type gid_type =
3878 id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
3879 rdma_start_port(id_priv->cma_dev->device)];
3880
3881 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
3882 ib_init_ah_from_mcmember(id_priv->id.device,
3883 id_priv->id.port_num, &multicast->rec,
3884 ndev, gid_type,
3885 &event.param.ud.ah_attr);
3886 event.param.ud.qp_num = 0xFFFFFF;
3887 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
3888 if (ndev)
3889 dev_put(ndev);
3890 } else
3891 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
3892
3893 ret = id_priv->id.event_handler(&id_priv->id, &event);
3894 if (ret) {
3895 cma_exch(id_priv, RDMA_CM_DESTROYING);
3896 mutex_unlock(&id_priv->handler_mutex);
3897 rdma_destroy_id(&id_priv->id);
3898 return 0;
3899 }
3900
3901out:
3902 mutex_unlock(&id_priv->handler_mutex);
3903 return 0;
3904}
3905
3906static void cma_set_mgid(struct rdma_id_private *id_priv,
3907 struct sockaddr *addr, union ib_gid *mgid)
3908{
3909 unsigned char mc_map[MAX_ADDR_LEN];
3910 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3911 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
3912 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
3913
3914 if (cma_any_addr(addr)) {
3915 memset(mgid, 0, sizeof *mgid);
3916 } else if ((addr->sa_family == AF_INET6) &&
3917 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
3918 0xFF10A01B)) {
3919
3920 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3921 } else if (addr->sa_family == AF_IB) {
3922 memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid);
3923 } else if ((addr->sa_family == AF_INET6)) {
3924 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
3925 if (id_priv->id.ps == RDMA_PS_UDP)
3926 mc_map[7] = 0x01;
3927 *mgid = *(union ib_gid *) (mc_map + 4);
3928 } else {
3929 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
3930 if (id_priv->id.ps == RDMA_PS_UDP)
3931 mc_map[7] = 0x01;
3932 *mgid = *(union ib_gid *) (mc_map + 4);
3933 }
3934}
3935
3936static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
3937 struct cma_multicast *mc)
3938{
3939 struct ib_sa_mcmember_rec rec;
3940 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3941 ib_sa_comp_mask comp_mask;
3942 int ret;
3943
3944 ib_addr_get_mgid(dev_addr, &rec.mgid);
3945 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
3946 &rec.mgid, &rec);
3947 if (ret)
3948 return ret;
3949
3950 ret = cma_set_qkey(id_priv, 0);
3951 if (ret)
3952 return ret;
3953
3954 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
3955 rec.qkey = cpu_to_be32(id_priv->qkey);
3956 rdma_addr_get_sgid(dev_addr, &rec.port_gid);
3957 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
3958 rec.join_state = mc->join_state;
3959
3960 if ((rec.join_state == BIT(SENDONLY_FULLMEMBER_JOIN)) &&
3961 (!ib_sa_sendonly_fullmem_support(&sa_client,
3962 id_priv->id.device,
3963 id_priv->id.port_num))) {
3964 pr_warn("RDMA CM: %s port %u Unable to multicast join\n"
3965 "RDMA CM: SM doesn't support Send Only Full Member option\n",
3966 id_priv->id.device->name, id_priv->id.port_num);
3967 return -EOPNOTSUPP;
3968 }
3969
3970 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
3971 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
3972 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
3973 IB_SA_MCMEMBER_REC_FLOW_LABEL |
3974 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
3975
3976 if (id_priv->id.ps == RDMA_PS_IPOIB)
3977 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
3978 IB_SA_MCMEMBER_REC_RATE_SELECTOR |
3979 IB_SA_MCMEMBER_REC_MTU_SELECTOR |
3980 IB_SA_MCMEMBER_REC_MTU |
3981 IB_SA_MCMEMBER_REC_HOP_LIMIT;
3982
3983 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
3984 id_priv->id.port_num, &rec,
3985 comp_mask, GFP_KERNEL,
3986 cma_ib_mc_handler, mc);
3987 return PTR_ERR_OR_ZERO(mc->multicast.ib);
3988}
3989
3990static void iboe_mcast_work_handler(struct work_struct *work)
3991{
3992 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
3993 struct cma_multicast *mc = mw->mc;
3994 struct ib_sa_multicast *m = mc->multicast.ib;
3995
3996 mc->multicast.ib->context = mc;
3997 cma_ib_mc_handler(0, m);
3998 kref_put(&mc->mcref, release_mc);
3999 kfree(mw);
4000}
4001
4002static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid,
4003 enum ib_gid_type gid_type)
4004{
4005 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
4006 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
4007
4008 if (cma_any_addr(addr)) {
4009 memset(mgid, 0, sizeof *mgid);
4010 } else if (addr->sa_family == AF_INET6) {
4011 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
4012 } else {
4013 mgid->raw[0] = (gid_type == IB_GID_TYPE_IB) ? 0xff : 0;
4014 mgid->raw[1] = (gid_type == IB_GID_TYPE_IB) ? 0x0e : 0;
4015 mgid->raw[2] = 0;
4016 mgid->raw[3] = 0;
4017 mgid->raw[4] = 0;
4018 mgid->raw[5] = 0;
4019 mgid->raw[6] = 0;
4020 mgid->raw[7] = 0;
4021 mgid->raw[8] = 0;
4022 mgid->raw[9] = 0;
4023 mgid->raw[10] = 0xff;
4024 mgid->raw[11] = 0xff;
4025 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
4026 }
4027}
4028
4029static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
4030 struct cma_multicast *mc)
4031{
4032 struct iboe_mcast_work *work;
4033 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
4034 int err = 0;
4035 struct sockaddr *addr = (struct sockaddr *)&mc->addr;
4036 struct net_device *ndev = NULL;
4037 enum ib_gid_type gid_type;
4038 bool send_only;
4039
4040 send_only = mc->join_state == BIT(SENDONLY_FULLMEMBER_JOIN);
4041
4042 if (cma_zero_addr((struct sockaddr *)&mc->addr))
4043 return -EINVAL;
4044
4045 work = kzalloc(sizeof *work, GFP_KERNEL);
4046 if (!work)
4047 return -ENOMEM;
4048
4049 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
4050 if (!mc->multicast.ib) {
4051 err = -ENOMEM;
4052 goto out1;
4053 }
4054
4055 gid_type = id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
4056 rdma_start_port(id_priv->cma_dev->device)];
4057 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid, gid_type);
4058
4059 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
4060 if (id_priv->id.ps == RDMA_PS_UDP)
4061 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
4062
4063 if (dev_addr->bound_dev_if)
4064 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
4065 if (!ndev) {
4066 err = -ENODEV;
4067 goto out2;
4068 }
4069 mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
4070 mc->multicast.ib->rec.hop_limit = 1;
4071 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
4072
4073 if (addr->sa_family == AF_INET) {
4074 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) {
4075 mc->multicast.ib->rec.hop_limit = IPV6_DEFAULT_HOPLIMIT;
4076 if (!send_only) {
4077 err = cma_igmp_send(ndev, &mc->multicast.ib->rec.mgid,
4078 true);
4079 if (!err)
4080 mc->igmp_joined = true;
4081 }
4082 }
4083 } else {
4084 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP)
4085 err = -ENOTSUPP;
4086 }
4087 dev_put(ndev);
4088 if (err || !mc->multicast.ib->rec.mtu) {
4089 if (!err)
4090 err = -EINVAL;
4091 goto out2;
4092 }
4093 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
4094 &mc->multicast.ib->rec.port_gid);
4095 work->id = id_priv;
4096 work->mc = mc;
4097 INIT_WORK(&work->work, iboe_mcast_work_handler);
4098 kref_get(&mc->mcref);
4099 queue_work(cma_wq, &work->work);
4100
4101 return 0;
4102
4103out2:
4104 kfree(mc->multicast.ib);
4105out1:
4106 kfree(work);
4107 return err;
4108}
4109
4110int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
4111 u8 join_state, void *context)
4112{
4113 struct rdma_id_private *id_priv;
4114 struct cma_multicast *mc;
4115 int ret;
4116
4117 id_priv = container_of(id, struct rdma_id_private, id);
4118 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
4119 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
4120 return -EINVAL;
4121
4122 mc = kmalloc(sizeof *mc, GFP_KERNEL);
4123 if (!mc)
4124 return -ENOMEM;
4125
4126 memcpy(&mc->addr, addr, rdma_addr_size(addr));
4127 mc->context = context;
4128 mc->id_priv = id_priv;
4129 mc->igmp_joined = false;
4130 mc->join_state = join_state;
4131 spin_lock(&id_priv->lock);
4132 list_add(&mc->list, &id_priv->mc_list);
4133 spin_unlock(&id_priv->lock);
4134
4135 if (rdma_protocol_roce(id->device, id->port_num)) {
4136 kref_init(&mc->mcref);
4137 ret = cma_iboe_join_multicast(id_priv, mc);
4138 } else if (rdma_cap_ib_mcast(id->device, id->port_num))
4139 ret = cma_join_ib_multicast(id_priv, mc);
4140 else
4141 ret = -ENOSYS;
4142
4143 if (ret) {
4144 spin_lock_irq(&id_priv->lock);
4145 list_del(&mc->list);
4146 spin_unlock_irq(&id_priv->lock);
4147 kfree(mc);
4148 }
4149 return ret;
4150}
4151EXPORT_SYMBOL(rdma_join_multicast);
4152
4153void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
4154{
4155 struct rdma_id_private *id_priv;
4156 struct cma_multicast *mc;
4157
4158 id_priv = container_of(id, struct rdma_id_private, id);
4159 spin_lock_irq(&id_priv->lock);
4160 list_for_each_entry(mc, &id_priv->mc_list, list) {
4161 if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) {
4162 list_del(&mc->list);
4163 spin_unlock_irq(&id_priv->lock);
4164
4165 if (id->qp)
4166 ib_detach_mcast(id->qp,
4167 &mc->multicast.ib->rec.mgid,
4168 be16_to_cpu(mc->multicast.ib->rec.mlid));
4169
4170 BUG_ON(id_priv->cma_dev->device != id->device);
4171
4172 if (rdma_cap_ib_mcast(id->device, id->port_num)) {
4173 ib_sa_free_multicast(mc->multicast.ib);
4174 kfree(mc);
4175 } else if (rdma_protocol_roce(id->device, id->port_num)) {
4176 if (mc->igmp_joined) {
4177 struct rdma_dev_addr *dev_addr =
4178 &id->route.addr.dev_addr;
4179 struct net_device *ndev = NULL;
4180
4181 if (dev_addr->bound_dev_if)
4182 ndev = dev_get_by_index(&init_net,
4183 dev_addr->bound_dev_if);
4184 if (ndev) {
4185 cma_igmp_send(ndev,
4186 &mc->multicast.ib->rec.mgid,
4187 false);
4188 dev_put(ndev);
4189 }
4190 mc->igmp_joined = false;
4191 }
4192 kref_put(&mc->mcref, release_mc);
4193 }
4194 return;
4195 }
4196 }
4197 spin_unlock_irq(&id_priv->lock);
4198}
4199EXPORT_SYMBOL(rdma_leave_multicast);
4200
4201static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
4202{
4203 struct rdma_dev_addr *dev_addr;
4204 struct cma_ndev_work *work;
4205
4206 dev_addr = &id_priv->id.route.addr.dev_addr;
4207
4208 if ((dev_addr->bound_dev_if == ndev->ifindex) &&
4209 (net_eq(dev_net(ndev), dev_addr->net)) &&
4210 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
4211 pr_info("RDMA CM addr change for ndev %s used by id %p\n",
4212 ndev->name, &id_priv->id);
4213 work = kzalloc(sizeof *work, GFP_KERNEL);
4214 if (!work)
4215 return -ENOMEM;
4216
4217 INIT_WORK(&work->work, cma_ndev_work_handler);
4218 work->id = id_priv;
4219 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
4220 atomic_inc(&id_priv->refcount);
4221 queue_work(cma_wq, &work->work);
4222 }
4223
4224 return 0;
4225}
4226
4227static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
4228 void *ptr)
4229{
4230 struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
4231 struct cma_device *cma_dev;
4232 struct rdma_id_private *id_priv;
4233 int ret = NOTIFY_DONE;
4234
4235 if (event != NETDEV_BONDING_FAILOVER)
4236 return NOTIFY_DONE;
4237
4238 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
4239 return NOTIFY_DONE;
4240
4241 mutex_lock(&lock);
4242 list_for_each_entry(cma_dev, &dev_list, list)
4243 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
4244 ret = cma_netdev_change(ndev, id_priv);
4245 if (ret)
4246 goto out;
4247 }
4248
4249out:
4250 mutex_unlock(&lock);
4251 return ret;
4252}
4253
4254static struct notifier_block cma_nb = {
4255 .notifier_call = cma_netdev_callback
4256};
4257
4258static void cma_add_one(struct ib_device *device)
4259{
4260 struct cma_device *cma_dev;
4261 struct rdma_id_private *id_priv;
4262 unsigned int i;
4263 unsigned long supported_gids = 0;
4264
4265 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
4266 if (!cma_dev)
4267 return;
4268
4269 cma_dev->device = device;
4270 cma_dev->default_gid_type = kcalloc(device->phys_port_cnt,
4271 sizeof(*cma_dev->default_gid_type),
4272 GFP_KERNEL);
4273 if (!cma_dev->default_gid_type)
4274 goto free_cma_dev;
4275
4276 cma_dev->default_roce_tos = kcalloc(device->phys_port_cnt,
4277 sizeof(*cma_dev->default_roce_tos),
4278 GFP_KERNEL);
4279 if (!cma_dev->default_roce_tos)
4280 goto free_gid_type;
4281
4282 for (i = rdma_start_port(device); i <= rdma_end_port(device); i++) {
4283 supported_gids = roce_gid_type_mask_support(device, i);
4284 WARN_ON(!supported_gids);
4285 if (supported_gids & (1 << CMA_PREFERRED_ROCE_GID_TYPE))
4286 cma_dev->default_gid_type[i - rdma_start_port(device)] =
4287 CMA_PREFERRED_ROCE_GID_TYPE;
4288 else
4289 cma_dev->default_gid_type[i - rdma_start_port(device)] =
4290 find_first_bit(&supported_gids, BITS_PER_LONG);
4291 cma_dev->default_roce_tos[i - rdma_start_port(device)] = 0;
4292 }
4293
4294 init_completion(&cma_dev->comp);
4295 atomic_set(&cma_dev->refcount, 1);
4296 INIT_LIST_HEAD(&cma_dev->id_list);
4297 ib_set_client_data(device, &cma_client, cma_dev);
4298
4299 mutex_lock(&lock);
4300 list_add_tail(&cma_dev->list, &dev_list);
4301 list_for_each_entry(id_priv, &listen_any_list, list)
4302 cma_listen_on_dev(id_priv, cma_dev);
4303 mutex_unlock(&lock);
4304
4305 return;
4306
4307free_gid_type:
4308 kfree(cma_dev->default_gid_type);
4309
4310free_cma_dev:
4311 kfree(cma_dev);
4312
4313 return;
4314}
4315
4316static int cma_remove_id_dev(struct rdma_id_private *id_priv)
4317{
4318 struct rdma_cm_event event;
4319 enum rdma_cm_state state;
4320 int ret = 0;
4321
4322
4323 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
4324 if (state == RDMA_CM_DESTROYING)
4325 return 0;
4326
4327 cma_cancel_operation(id_priv, state);
4328 mutex_lock(&id_priv->handler_mutex);
4329
4330
4331 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
4332 goto out;
4333
4334 memset(&event, 0, sizeof event);
4335 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
4336 ret = id_priv->id.event_handler(&id_priv->id, &event);
4337out:
4338 mutex_unlock(&id_priv->handler_mutex);
4339 return ret;
4340}
4341
4342static void cma_process_remove(struct cma_device *cma_dev)
4343{
4344 struct rdma_id_private *id_priv;
4345 int ret;
4346
4347 mutex_lock(&lock);
4348 while (!list_empty(&cma_dev->id_list)) {
4349 id_priv = list_entry(cma_dev->id_list.next,
4350 struct rdma_id_private, list);
4351
4352 list_del(&id_priv->listen_list);
4353 list_del_init(&id_priv->list);
4354 atomic_inc(&id_priv->refcount);
4355 mutex_unlock(&lock);
4356
4357 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
4358 cma_deref_id(id_priv);
4359 if (ret)
4360 rdma_destroy_id(&id_priv->id);
4361
4362 mutex_lock(&lock);
4363 }
4364 mutex_unlock(&lock);
4365
4366 cma_deref_dev(cma_dev);
4367 wait_for_completion(&cma_dev->comp);
4368}
4369
4370static void cma_remove_one(struct ib_device *device, void *client_data)
4371{
4372 struct cma_device *cma_dev = client_data;
4373
4374 if (!cma_dev)
4375 return;
4376
4377 mutex_lock(&lock);
4378 list_del(&cma_dev->list);
4379 mutex_unlock(&lock);
4380
4381 cma_process_remove(cma_dev);
4382 kfree(cma_dev->default_roce_tos);
4383 kfree(cma_dev->default_gid_type);
4384 kfree(cma_dev);
4385}
4386
4387static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb)
4388{
4389 struct nlmsghdr *nlh;
4390 struct rdma_cm_id_stats *id_stats;
4391 struct rdma_id_private *id_priv;
4392 struct rdma_cm_id *id = NULL;
4393 struct cma_device *cma_dev;
4394 int i_dev = 0, i_id = 0;
4395
4396
4397
4398
4399
4400 mutex_lock(&lock);
4401
4402 list_for_each_entry(cma_dev, &dev_list, list) {
4403 if (i_dev < cb->args[0]) {
4404 i_dev++;
4405 continue;
4406 }
4407
4408 i_id = 0;
4409 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
4410 if (i_id < cb->args[1]) {
4411 i_id++;
4412 continue;
4413 }
4414
4415 id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq,
4416 sizeof *id_stats, RDMA_NL_RDMA_CM,
4417 RDMA_NL_RDMA_CM_ID_STATS,
4418 NLM_F_MULTI);
4419 if (!id_stats)
4420 goto out;
4421
4422 memset(id_stats, 0, sizeof *id_stats);
4423 id = &id_priv->id;
4424 id_stats->node_type = id->route.addr.dev_addr.dev_type;
4425 id_stats->port_num = id->port_num;
4426 id_stats->bound_dev_if =
4427 id->route.addr.dev_addr.bound_dev_if;
4428
4429 if (ibnl_put_attr(skb, nlh,
4430 rdma_addr_size(cma_src_addr(id_priv)),
4431 cma_src_addr(id_priv),
4432 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR))
4433 goto out;
4434 if (ibnl_put_attr(skb, nlh,
4435 rdma_addr_size(cma_src_addr(id_priv)),
4436 cma_dst_addr(id_priv),
4437 RDMA_NL_RDMA_CM_ATTR_DST_ADDR))
4438 goto out;
4439
4440 id_stats->pid = id_priv->owner;
4441 id_stats->port_space = id->ps;
4442 id_stats->cm_state = id_priv->state;
4443 id_stats->qp_num = id_priv->qp_num;
4444 id_stats->qp_type = id->qp_type;
4445
4446 i_id++;
4447 }
4448
4449 cb->args[1] = 0;
4450 i_dev++;
4451 }
4452
4453out:
4454 mutex_unlock(&lock);
4455 cb->args[0] = i_dev;
4456 cb->args[1] = i_id;
4457
4458 return skb->len;
4459}
4460
4461static const struct rdma_nl_cbs cma_cb_table[] = {
4462 [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats},
4463};
4464
4465static int cma_init_net(struct net *net)
4466{
4467 struct cma_pernet *pernet = cma_pernet(net);
4468
4469 idr_init(&pernet->tcp_ps);
4470 idr_init(&pernet->udp_ps);
4471 idr_init(&pernet->ipoib_ps);
4472 idr_init(&pernet->ib_ps);
4473
4474 return 0;
4475}
4476
4477static void cma_exit_net(struct net *net)
4478{
4479 struct cma_pernet *pernet = cma_pernet(net);
4480
4481 idr_destroy(&pernet->tcp_ps);
4482 idr_destroy(&pernet->udp_ps);
4483 idr_destroy(&pernet->ipoib_ps);
4484 idr_destroy(&pernet->ib_ps);
4485}
4486
4487static struct pernet_operations cma_pernet_operations = {
4488 .init = cma_init_net,
4489 .exit = cma_exit_net,
4490 .id = &cma_pernet_id,
4491 .size = sizeof(struct cma_pernet),
4492};
4493
4494static int __init cma_init(void)
4495{
4496 int ret;
4497
4498 cma_wq = alloc_ordered_workqueue("rdma_cm", WQ_MEM_RECLAIM);
4499 if (!cma_wq)
4500 return -ENOMEM;
4501
4502 ret = register_pernet_subsys(&cma_pernet_operations);
4503 if (ret)
4504 goto err_wq;
4505
4506 ib_sa_register_client(&sa_client);
4507 rdma_addr_register_client(&addr_client);
4508 register_netdevice_notifier(&cma_nb);
4509
4510 ret = ib_register_client(&cma_client);
4511 if (ret)
4512 goto err;
4513
4514 rdma_nl_register(RDMA_NL_RDMA_CM, cma_cb_table);
4515 cma_configfs_init();
4516
4517 return 0;
4518
4519err:
4520 unregister_netdevice_notifier(&cma_nb);
4521 rdma_addr_unregister_client(&addr_client);
4522 ib_sa_unregister_client(&sa_client);
4523err_wq:
4524 destroy_workqueue(cma_wq);
4525 return ret;
4526}
4527
4528static void __exit cma_cleanup(void)
4529{
4530 cma_configfs_exit();
4531 rdma_nl_unregister(RDMA_NL_RDMA_CM);
4532 ib_unregister_client(&cma_client);
4533 unregister_netdevice_notifier(&cma_nb);
4534 rdma_addr_unregister_client(&addr_client);
4535 ib_sa_unregister_client(&sa_client);
4536 unregister_pernet_subsys(&cma_pernet_operations);
4537 destroy_workqueue(cma_wq);
4538}
4539
4540MODULE_ALIAS_RDMA_NETLINK(RDMA_NL_RDMA_CM, 1);
4541
4542module_init(cma_init);
4543module_exit(cma_cleanup);
4544