This source file includes following definitions.
- rdma_event_msg
- rdma_reject_msg
- rdma_is_consumer_reject
- rdma_consumer_reject_data
- rdma_iw_cm_id
- rdma_res_to_id
- cma_pernet_xa
- cma_ps_alloc
- cma_ps_find
- cma_ps_remove
- cma_ref_dev
- cma_enum_devices_by_ibdev
- cma_get_default_gid_type
- cma_set_default_gid_type
- cma_get_default_roce_tos
- cma_set_default_roce_tos
- cma_get_ib_dev
- cma_comp
- cma_comp_exch
- cma_exch
- cma_get_ip_ver
- cma_set_ip_ver
- cma_igmp_send
- _cma_attach_to_dev
- cma_attach_to_dev
- cma_deref_dev
- release_mc
- cma_release_dev
- cma_src_addr
- cma_dst_addr
- cma_family
- cma_set_qkey
- cma_translate_ib
- cma_translate_addr
- cma_validate_port
- cma_bind_sgid_attr
- cma_acquire_dev_by_src_ip
- cma_ib_acquire_dev
- cma_iw_acquire_dev
- cma_resolve_ib_dev
- cma_deref_id
- __rdma_create_id
- cma_init_ud_qp
- cma_init_conn_qp
- rdma_create_qp
- rdma_destroy_qp
- cma_modify_qp_rtr
- cma_modify_qp_rts
- cma_modify_qp_err
- cma_ib_init_qp_attr
- rdma_init_qp_attr
- cma_zero_addr
- cma_loopback_addr
- cma_any_addr
- cma_addr_cmp
- cma_port
- cma_any_port
- cma_save_ib_info
- cma_save_ip4_info
- cma_save_ip6_info
- cma_port_from_service_id
- cma_save_ip_info
- cma_save_net_info
- cma_save_req_info
- validate_ipv4_net_dev
- validate_ipv6_net_dev
- validate_net_dev
- roce_get_net_dev_by_cm_event
- cma_get_net_dev
- rdma_ps_from_service_id
- cma_match_private_data
- cma_protocol_roce
- cma_is_req_ipv6_ll
- cma_match_net_dev
- cma_find_listener
- cma_ib_id_from_event
- cma_user_data_offset
- cma_cancel_route
- cma_cancel_listens
- cma_cancel_operation
- cma_release_port
- cma_leave_roce_mc_group
- cma_leave_mc_groups
- rdma_destroy_id
- cma_rep_recv
- cma_set_rep_event_data
- cma_ib_handler
- cma_ib_new_conn_id
- cma_ib_new_udp_id
- cma_set_req_event_data
- cma_ib_check_req_qp_type
- cma_ib_req_handler
- rdma_get_service_id
- rdma_read_gids
- cma_iw_handler
- iw_conn_req_handler
- cma_ib_listen
- cma_iw_listen
- cma_listen_handler
- cma_listen_on_dev
- cma_listen_on_all
- rdma_set_service_type
- rdma_set_ack_timeout
- cma_query_handler
- cma_query_ib_route
- cma_work_handler
- cma_ndev_work_handler
- cma_init_resolve_route_work
- cma_init_resolve_addr_work
- cma_resolve_ib_route
- cma_route_gid_type
- cma_iboe_set_path_rec_l2_fields
- rdma_set_ib_path
- cma_resolve_iw_route
- iboe_tos_to_sl
- cma_resolve_iboe_route
- rdma_resolve_route
- cma_set_loopback
- cma_bind_loopback
- addr_handler
- cma_resolve_loopback
- cma_resolve_ib_addr
- cma_bind_addr
- rdma_resolve_addr
- rdma_set_reuseaddr
- rdma_set_afonly
- cma_bind_port
- cma_alloc_port
- cma_port_is_unique
- cma_alloc_any_port
- cma_check_port
- cma_use_port
- cma_bind_listen
- cma_select_inet_ps
- cma_select_ib_ps
- cma_get_port
- cma_check_linklocal
- rdma_listen
- rdma_bind_addr
- cma_format_hdr
- cma_sidr_rep_handler
- cma_resolve_ib_udp
- cma_connect_ib
- cma_connect_iw
- rdma_connect
- cma_accept_ib
- cma_accept_iw
- cma_send_sidr_rep
- __rdma_accept
- rdma_notify
- rdma_reject
- rdma_disconnect
- cma_ib_mc_handler
- cma_set_mgid
- cma_join_ib_multicast
- iboe_mcast_work_handler
- cma_iboe_set_mgid
- cma_iboe_join_multicast
- rdma_join_multicast
- rdma_leave_multicast
- cma_netdev_change
- cma_netdev_callback
- cma_add_one
- cma_remove_id_dev
- cma_process_remove
- cma_remove_one
- cma_init_net
- cma_exit_net
- cma_init
- cma_cleanup
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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/xarray.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 #include "cma_priv.h"
66
67 MODULE_AUTHOR("Sean Hefty");
68 MODULE_DESCRIPTION("Generic RDMA CM Agent");
69 MODULE_LICENSE("Dual BSD/GPL");
70
71 #define CMA_CM_RESPONSE_TIMEOUT 20
72 #define CMA_QUERY_CLASSPORT_INFO_TIMEOUT 3000
73 #define CMA_MAX_CM_RETRIES 15
74 #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
75 #define CMA_IBOE_PACKET_LIFETIME 18
76 #define CMA_PREFERRED_ROCE_GID_TYPE IB_GID_TYPE_ROCE_UDP_ENCAP
77
78 static const char * const cma_events[] = {
79 [RDMA_CM_EVENT_ADDR_RESOLVED] = "address resolved",
80 [RDMA_CM_EVENT_ADDR_ERROR] = "address error",
81 [RDMA_CM_EVENT_ROUTE_RESOLVED] = "route resolved ",
82 [RDMA_CM_EVENT_ROUTE_ERROR] = "route error",
83 [RDMA_CM_EVENT_CONNECT_REQUEST] = "connect request",
84 [RDMA_CM_EVENT_CONNECT_RESPONSE] = "connect response",
85 [RDMA_CM_EVENT_CONNECT_ERROR] = "connect error",
86 [RDMA_CM_EVENT_UNREACHABLE] = "unreachable",
87 [RDMA_CM_EVENT_REJECTED] = "rejected",
88 [RDMA_CM_EVENT_ESTABLISHED] = "established",
89 [RDMA_CM_EVENT_DISCONNECTED] = "disconnected",
90 [RDMA_CM_EVENT_DEVICE_REMOVAL] = "device removal",
91 [RDMA_CM_EVENT_MULTICAST_JOIN] = "multicast join",
92 [RDMA_CM_EVENT_MULTICAST_ERROR] = "multicast error",
93 [RDMA_CM_EVENT_ADDR_CHANGE] = "address change",
94 [RDMA_CM_EVENT_TIMEWAIT_EXIT] = "timewait exit",
95 };
96
97 const char *__attribute_const__ rdma_event_msg(enum rdma_cm_event_type event)
98 {
99 size_t index = event;
100
101 return (index < ARRAY_SIZE(cma_events) && cma_events[index]) ?
102 cma_events[index] : "unrecognized event";
103 }
104 EXPORT_SYMBOL(rdma_event_msg);
105
106 const char *__attribute_const__ rdma_reject_msg(struct rdma_cm_id *id,
107 int reason)
108 {
109 if (rdma_ib_or_roce(id->device, id->port_num))
110 return ibcm_reject_msg(reason);
111
112 if (rdma_protocol_iwarp(id->device, id->port_num))
113 return iwcm_reject_msg(reason);
114
115 WARN_ON_ONCE(1);
116 return "unrecognized transport";
117 }
118 EXPORT_SYMBOL(rdma_reject_msg);
119
120 bool rdma_is_consumer_reject(struct rdma_cm_id *id, int reason)
121 {
122 if (rdma_ib_or_roce(id->device, id->port_num))
123 return reason == IB_CM_REJ_CONSUMER_DEFINED;
124
125 if (rdma_protocol_iwarp(id->device, id->port_num))
126 return reason == -ECONNREFUSED;
127
128 WARN_ON_ONCE(1);
129 return false;
130 }
131 EXPORT_SYMBOL(rdma_is_consumer_reject);
132
133 const void *rdma_consumer_reject_data(struct rdma_cm_id *id,
134 struct rdma_cm_event *ev, u8 *data_len)
135 {
136 const void *p;
137
138 if (rdma_is_consumer_reject(id, ev->status)) {
139 *data_len = ev->param.conn.private_data_len;
140 p = ev->param.conn.private_data;
141 } else {
142 *data_len = 0;
143 p = NULL;
144 }
145 return p;
146 }
147 EXPORT_SYMBOL(rdma_consumer_reject_data);
148
149
150
151
152
153 struct iw_cm_id *rdma_iw_cm_id(struct rdma_cm_id *id)
154 {
155 struct rdma_id_private *id_priv;
156
157 id_priv = container_of(id, struct rdma_id_private, id);
158 if (id->device->node_type == RDMA_NODE_RNIC)
159 return id_priv->cm_id.iw;
160 return NULL;
161 }
162 EXPORT_SYMBOL(rdma_iw_cm_id);
163
164
165
166
167
168 struct rdma_cm_id *rdma_res_to_id(struct rdma_restrack_entry *res)
169 {
170 struct rdma_id_private *id_priv =
171 container_of(res, struct rdma_id_private, res);
172
173 return &id_priv->id;
174 }
175 EXPORT_SYMBOL(rdma_res_to_id);
176
177 static void cma_add_one(struct ib_device *device);
178 static void cma_remove_one(struct ib_device *device, void *client_data);
179
180 static struct ib_client cma_client = {
181 .name = "cma",
182 .add = cma_add_one,
183 .remove = cma_remove_one
184 };
185
186 static struct ib_sa_client sa_client;
187 static LIST_HEAD(dev_list);
188 static LIST_HEAD(listen_any_list);
189 static DEFINE_MUTEX(lock);
190 static struct workqueue_struct *cma_wq;
191 static unsigned int cma_pernet_id;
192
193 struct cma_pernet {
194 struct xarray tcp_ps;
195 struct xarray udp_ps;
196 struct xarray ipoib_ps;
197 struct xarray ib_ps;
198 };
199
200 static struct cma_pernet *cma_pernet(struct net *net)
201 {
202 return net_generic(net, cma_pernet_id);
203 }
204
205 static
206 struct xarray *cma_pernet_xa(struct net *net, enum rdma_ucm_port_space ps)
207 {
208 struct cma_pernet *pernet = cma_pernet(net);
209
210 switch (ps) {
211 case RDMA_PS_TCP:
212 return &pernet->tcp_ps;
213 case RDMA_PS_UDP:
214 return &pernet->udp_ps;
215 case RDMA_PS_IPOIB:
216 return &pernet->ipoib_ps;
217 case RDMA_PS_IB:
218 return &pernet->ib_ps;
219 default:
220 return NULL;
221 }
222 }
223
224 struct cma_device {
225 struct list_head list;
226 struct ib_device *device;
227 struct completion comp;
228 atomic_t refcount;
229 struct list_head id_list;
230 enum ib_gid_type *default_gid_type;
231 u8 *default_roce_tos;
232 };
233
234 struct rdma_bind_list {
235 enum rdma_ucm_port_space ps;
236 struct hlist_head owners;
237 unsigned short port;
238 };
239
240 struct class_port_info_context {
241 struct ib_class_port_info *class_port_info;
242 struct ib_device *device;
243 struct completion done;
244 struct ib_sa_query *sa_query;
245 u8 port_num;
246 };
247
248 static int cma_ps_alloc(struct net *net, enum rdma_ucm_port_space ps,
249 struct rdma_bind_list *bind_list, int snum)
250 {
251 struct xarray *xa = cma_pernet_xa(net, ps);
252
253 return xa_insert(xa, snum, bind_list, GFP_KERNEL);
254 }
255
256 static struct rdma_bind_list *cma_ps_find(struct net *net,
257 enum rdma_ucm_port_space ps, int snum)
258 {
259 struct xarray *xa = cma_pernet_xa(net, ps);
260
261 return xa_load(xa, snum);
262 }
263
264 static void cma_ps_remove(struct net *net, enum rdma_ucm_port_space ps,
265 int snum)
266 {
267 struct xarray *xa = cma_pernet_xa(net, ps);
268
269 xa_erase(xa, snum);
270 }
271
272 enum {
273 CMA_OPTION_AFONLY,
274 };
275
276 void cma_ref_dev(struct cma_device *cma_dev)
277 {
278 atomic_inc(&cma_dev->refcount);
279 }
280
281 struct cma_device *cma_enum_devices_by_ibdev(cma_device_filter filter,
282 void *cookie)
283 {
284 struct cma_device *cma_dev;
285 struct cma_device *found_cma_dev = NULL;
286
287 mutex_lock(&lock);
288
289 list_for_each_entry(cma_dev, &dev_list, list)
290 if (filter(cma_dev->device, cookie)) {
291 found_cma_dev = cma_dev;
292 break;
293 }
294
295 if (found_cma_dev)
296 cma_ref_dev(found_cma_dev);
297 mutex_unlock(&lock);
298 return found_cma_dev;
299 }
300
301 int cma_get_default_gid_type(struct cma_device *cma_dev,
302 unsigned int port)
303 {
304 if (!rdma_is_port_valid(cma_dev->device, port))
305 return -EINVAL;
306
307 return cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)];
308 }
309
310 int cma_set_default_gid_type(struct cma_device *cma_dev,
311 unsigned int port,
312 enum ib_gid_type default_gid_type)
313 {
314 unsigned long supported_gids;
315
316 if (!rdma_is_port_valid(cma_dev->device, port))
317 return -EINVAL;
318
319 supported_gids = roce_gid_type_mask_support(cma_dev->device, port);
320
321 if (!(supported_gids & 1 << default_gid_type))
322 return -EINVAL;
323
324 cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)] =
325 default_gid_type;
326
327 return 0;
328 }
329
330 int cma_get_default_roce_tos(struct cma_device *cma_dev, unsigned int port)
331 {
332 if (!rdma_is_port_valid(cma_dev->device, port))
333 return -EINVAL;
334
335 return cma_dev->default_roce_tos[port - rdma_start_port(cma_dev->device)];
336 }
337
338 int cma_set_default_roce_tos(struct cma_device *cma_dev, unsigned int port,
339 u8 default_roce_tos)
340 {
341 if (!rdma_is_port_valid(cma_dev->device, port))
342 return -EINVAL;
343
344 cma_dev->default_roce_tos[port - rdma_start_port(cma_dev->device)] =
345 default_roce_tos;
346
347 return 0;
348 }
349 struct ib_device *cma_get_ib_dev(struct cma_device *cma_dev)
350 {
351 return cma_dev->device;
352 }
353
354
355
356
357
358
359
360
361 struct cma_multicast {
362 struct rdma_id_private *id_priv;
363 union {
364 struct ib_sa_multicast *ib;
365 } multicast;
366 struct list_head list;
367 void *context;
368 struct sockaddr_storage addr;
369 struct kref mcref;
370 u8 join_state;
371 };
372
373 struct cma_work {
374 struct work_struct work;
375 struct rdma_id_private *id;
376 enum rdma_cm_state old_state;
377 enum rdma_cm_state new_state;
378 struct rdma_cm_event event;
379 };
380
381 struct cma_ndev_work {
382 struct work_struct work;
383 struct rdma_id_private *id;
384 struct rdma_cm_event event;
385 };
386
387 struct iboe_mcast_work {
388 struct work_struct work;
389 struct rdma_id_private *id;
390 struct cma_multicast *mc;
391 };
392
393 union cma_ip_addr {
394 struct in6_addr ip6;
395 struct {
396 __be32 pad[3];
397 __be32 addr;
398 } ip4;
399 };
400
401 struct cma_hdr {
402 u8 cma_version;
403 u8 ip_version;
404 __be16 port;
405 union cma_ip_addr src_addr;
406 union cma_ip_addr dst_addr;
407 };
408
409 #define CMA_VERSION 0x00
410
411 struct cma_req_info {
412 struct sockaddr_storage listen_addr_storage;
413 struct sockaddr_storage src_addr_storage;
414 struct ib_device *device;
415 union ib_gid local_gid;
416 __be64 service_id;
417 int port;
418 bool has_gid;
419 u16 pkey;
420 };
421
422 static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp)
423 {
424 unsigned long flags;
425 int ret;
426
427 spin_lock_irqsave(&id_priv->lock, flags);
428 ret = (id_priv->state == comp);
429 spin_unlock_irqrestore(&id_priv->lock, flags);
430 return ret;
431 }
432
433 static int cma_comp_exch(struct rdma_id_private *id_priv,
434 enum rdma_cm_state comp, enum rdma_cm_state exch)
435 {
436 unsigned long flags;
437 int ret;
438
439 spin_lock_irqsave(&id_priv->lock, flags);
440 if ((ret = (id_priv->state == comp)))
441 id_priv->state = exch;
442 spin_unlock_irqrestore(&id_priv->lock, flags);
443 return ret;
444 }
445
446 static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv,
447 enum rdma_cm_state exch)
448 {
449 unsigned long flags;
450 enum rdma_cm_state old;
451
452 spin_lock_irqsave(&id_priv->lock, flags);
453 old = id_priv->state;
454 id_priv->state = exch;
455 spin_unlock_irqrestore(&id_priv->lock, flags);
456 return old;
457 }
458
459 static inline u8 cma_get_ip_ver(const struct cma_hdr *hdr)
460 {
461 return hdr->ip_version >> 4;
462 }
463
464 static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
465 {
466 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
467 }
468
469 static int cma_igmp_send(struct net_device *ndev, union ib_gid *mgid, bool join)
470 {
471 struct in_device *in_dev = NULL;
472
473 if (ndev) {
474 rtnl_lock();
475 in_dev = __in_dev_get_rtnl(ndev);
476 if (in_dev) {
477 if (join)
478 ip_mc_inc_group(in_dev,
479 *(__be32 *)(mgid->raw + 12));
480 else
481 ip_mc_dec_group(in_dev,
482 *(__be32 *)(mgid->raw + 12));
483 }
484 rtnl_unlock();
485 }
486 return (in_dev) ? 0 : -ENODEV;
487 }
488
489 static void _cma_attach_to_dev(struct rdma_id_private *id_priv,
490 struct cma_device *cma_dev)
491 {
492 cma_ref_dev(cma_dev);
493 id_priv->cma_dev = cma_dev;
494 id_priv->id.device = cma_dev->device;
495 id_priv->id.route.addr.dev_addr.transport =
496 rdma_node_get_transport(cma_dev->device->node_type);
497 list_add_tail(&id_priv->list, &cma_dev->id_list);
498 if (id_priv->res.kern_name)
499 rdma_restrack_kadd(&id_priv->res);
500 else
501 rdma_restrack_uadd(&id_priv->res);
502 }
503
504 static void cma_attach_to_dev(struct rdma_id_private *id_priv,
505 struct cma_device *cma_dev)
506 {
507 _cma_attach_to_dev(id_priv, cma_dev);
508 id_priv->gid_type =
509 cma_dev->default_gid_type[id_priv->id.port_num -
510 rdma_start_port(cma_dev->device)];
511 }
512
513 void cma_deref_dev(struct cma_device *cma_dev)
514 {
515 if (atomic_dec_and_test(&cma_dev->refcount))
516 complete(&cma_dev->comp);
517 }
518
519 static inline void release_mc(struct kref *kref)
520 {
521 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
522
523 kfree(mc->multicast.ib);
524 kfree(mc);
525 }
526
527 static void cma_release_dev(struct rdma_id_private *id_priv)
528 {
529 mutex_lock(&lock);
530 list_del(&id_priv->list);
531 cma_deref_dev(id_priv->cma_dev);
532 id_priv->cma_dev = NULL;
533 mutex_unlock(&lock);
534 }
535
536 static inline struct sockaddr *cma_src_addr(struct rdma_id_private *id_priv)
537 {
538 return (struct sockaddr *) &id_priv->id.route.addr.src_addr;
539 }
540
541 static inline struct sockaddr *cma_dst_addr(struct rdma_id_private *id_priv)
542 {
543 return (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
544 }
545
546 static inline unsigned short cma_family(struct rdma_id_private *id_priv)
547 {
548 return id_priv->id.route.addr.src_addr.ss_family;
549 }
550
551 static int cma_set_qkey(struct rdma_id_private *id_priv, u32 qkey)
552 {
553 struct ib_sa_mcmember_rec rec;
554 int ret = 0;
555
556 if (id_priv->qkey) {
557 if (qkey && id_priv->qkey != qkey)
558 return -EINVAL;
559 return 0;
560 }
561
562 if (qkey) {
563 id_priv->qkey = qkey;
564 return 0;
565 }
566
567 switch (id_priv->id.ps) {
568 case RDMA_PS_UDP:
569 case RDMA_PS_IB:
570 id_priv->qkey = RDMA_UDP_QKEY;
571 break;
572 case RDMA_PS_IPOIB:
573 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
574 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
575 id_priv->id.port_num, &rec.mgid,
576 &rec);
577 if (!ret)
578 id_priv->qkey = be32_to_cpu(rec.qkey);
579 break;
580 default:
581 break;
582 }
583 return ret;
584 }
585
586 static void cma_translate_ib(struct sockaddr_ib *sib, struct rdma_dev_addr *dev_addr)
587 {
588 dev_addr->dev_type = ARPHRD_INFINIBAND;
589 rdma_addr_set_sgid(dev_addr, (union ib_gid *) &sib->sib_addr);
590 ib_addr_set_pkey(dev_addr, ntohs(sib->sib_pkey));
591 }
592
593 static int cma_translate_addr(struct sockaddr *addr, struct rdma_dev_addr *dev_addr)
594 {
595 int ret;
596
597 if (addr->sa_family != AF_IB) {
598 ret = rdma_translate_ip(addr, dev_addr);
599 } else {
600 cma_translate_ib((struct sockaddr_ib *) addr, dev_addr);
601 ret = 0;
602 }
603
604 return ret;
605 }
606
607 static const struct ib_gid_attr *
608 cma_validate_port(struct ib_device *device, u8 port,
609 enum ib_gid_type gid_type,
610 union ib_gid *gid,
611 struct rdma_id_private *id_priv)
612 {
613 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
614 int bound_if_index = dev_addr->bound_dev_if;
615 const struct ib_gid_attr *sgid_attr;
616 int dev_type = dev_addr->dev_type;
617 struct net_device *ndev = NULL;
618
619 if (!rdma_dev_access_netns(device, id_priv->id.route.addr.dev_addr.net))
620 return ERR_PTR(-ENODEV);
621
622 if ((dev_type == ARPHRD_INFINIBAND) && !rdma_protocol_ib(device, port))
623 return ERR_PTR(-ENODEV);
624
625 if ((dev_type != ARPHRD_INFINIBAND) && rdma_protocol_ib(device, port))
626 return ERR_PTR(-ENODEV);
627
628 if (dev_type == ARPHRD_ETHER && rdma_protocol_roce(device, port)) {
629 ndev = dev_get_by_index(dev_addr->net, bound_if_index);
630 if (!ndev)
631 return ERR_PTR(-ENODEV);
632 } else {
633 gid_type = IB_GID_TYPE_IB;
634 }
635
636 sgid_attr = rdma_find_gid_by_port(device, gid, gid_type, port, ndev);
637 if (ndev)
638 dev_put(ndev);
639 return sgid_attr;
640 }
641
642 static void cma_bind_sgid_attr(struct rdma_id_private *id_priv,
643 const struct ib_gid_attr *sgid_attr)
644 {
645 WARN_ON(id_priv->id.route.addr.dev_addr.sgid_attr);
646 id_priv->id.route.addr.dev_addr.sgid_attr = sgid_attr;
647 }
648
649
650
651
652
653
654
655
656
657
658 static int cma_acquire_dev_by_src_ip(struct rdma_id_private *id_priv)
659 {
660 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
661 const struct ib_gid_attr *sgid_attr;
662 union ib_gid gid, iboe_gid, *gidp;
663 struct cma_device *cma_dev;
664 enum ib_gid_type gid_type;
665 int ret = -ENODEV;
666 unsigned int port;
667
668 if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
669 id_priv->id.ps == RDMA_PS_IPOIB)
670 return -EINVAL;
671
672 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
673 &iboe_gid);
674
675 memcpy(&gid, dev_addr->src_dev_addr +
676 rdma_addr_gid_offset(dev_addr), sizeof(gid));
677
678 mutex_lock(&lock);
679 list_for_each_entry(cma_dev, &dev_list, list) {
680 rdma_for_each_port (cma_dev->device, port) {
681 gidp = rdma_protocol_roce(cma_dev->device, port) ?
682 &iboe_gid : &gid;
683 gid_type = cma_dev->default_gid_type[port - 1];
684 sgid_attr = cma_validate_port(cma_dev->device, port,
685 gid_type, gidp, id_priv);
686 if (!IS_ERR(sgid_attr)) {
687 id_priv->id.port_num = port;
688 cma_bind_sgid_attr(id_priv, sgid_attr);
689 cma_attach_to_dev(id_priv, cma_dev);
690 ret = 0;
691 goto out;
692 }
693 }
694 }
695 out:
696 mutex_unlock(&lock);
697 return ret;
698 }
699
700
701
702
703
704
705
706
707
708
709
710
711 static int cma_ib_acquire_dev(struct rdma_id_private *id_priv,
712 const struct rdma_id_private *listen_id_priv,
713 struct cma_req_info *req)
714 {
715 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
716 const struct ib_gid_attr *sgid_attr;
717 enum ib_gid_type gid_type;
718 union ib_gid gid;
719
720 if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
721 id_priv->id.ps == RDMA_PS_IPOIB)
722 return -EINVAL;
723
724 if (rdma_protocol_roce(req->device, req->port))
725 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
726 &gid);
727 else
728 memcpy(&gid, dev_addr->src_dev_addr +
729 rdma_addr_gid_offset(dev_addr), sizeof(gid));
730
731 gid_type = listen_id_priv->cma_dev->default_gid_type[req->port - 1];
732 sgid_attr = cma_validate_port(req->device, req->port,
733 gid_type, &gid, id_priv);
734 if (IS_ERR(sgid_attr))
735 return PTR_ERR(sgid_attr);
736
737 id_priv->id.port_num = req->port;
738 cma_bind_sgid_attr(id_priv, sgid_attr);
739
740
741
742
743 mutex_lock(&lock);
744 cma_attach_to_dev(id_priv, listen_id_priv->cma_dev);
745 mutex_unlock(&lock);
746 return 0;
747 }
748
749 static int cma_iw_acquire_dev(struct rdma_id_private *id_priv,
750 const struct rdma_id_private *listen_id_priv)
751 {
752 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
753 const struct ib_gid_attr *sgid_attr;
754 struct cma_device *cma_dev;
755 enum ib_gid_type gid_type;
756 int ret = -ENODEV;
757 union ib_gid gid;
758 u8 port;
759
760 if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
761 id_priv->id.ps == RDMA_PS_IPOIB)
762 return -EINVAL;
763
764 memcpy(&gid, dev_addr->src_dev_addr +
765 rdma_addr_gid_offset(dev_addr), sizeof(gid));
766
767 mutex_lock(&lock);
768
769 cma_dev = listen_id_priv->cma_dev;
770 port = listen_id_priv->id.port_num;
771 gid_type = listen_id_priv->gid_type;
772 sgid_attr = cma_validate_port(cma_dev->device, port,
773 gid_type, &gid, id_priv);
774 if (!IS_ERR(sgid_attr)) {
775 id_priv->id.port_num = port;
776 cma_bind_sgid_attr(id_priv, sgid_attr);
777 ret = 0;
778 goto out;
779 }
780
781 list_for_each_entry(cma_dev, &dev_list, list) {
782 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
783 if (listen_id_priv->cma_dev == cma_dev &&
784 listen_id_priv->id.port_num == port)
785 continue;
786
787 gid_type = cma_dev->default_gid_type[port - 1];
788 sgid_attr = cma_validate_port(cma_dev->device, port,
789 gid_type, &gid, id_priv);
790 if (!IS_ERR(sgid_attr)) {
791 id_priv->id.port_num = port;
792 cma_bind_sgid_attr(id_priv, sgid_attr);
793 ret = 0;
794 goto out;
795 }
796 }
797 }
798
799 out:
800 if (!ret)
801 cma_attach_to_dev(id_priv, cma_dev);
802
803 mutex_unlock(&lock);
804 return ret;
805 }
806
807
808
809
810 static int cma_resolve_ib_dev(struct rdma_id_private *id_priv)
811 {
812 struct cma_device *cma_dev, *cur_dev;
813 struct sockaddr_ib *addr;
814 union ib_gid gid, sgid, *dgid;
815 u16 pkey, index;
816 u8 p;
817 enum ib_port_state port_state;
818 int i;
819
820 cma_dev = NULL;
821 addr = (struct sockaddr_ib *) cma_dst_addr(id_priv);
822 dgid = (union ib_gid *) &addr->sib_addr;
823 pkey = ntohs(addr->sib_pkey);
824
825 mutex_lock(&lock);
826 list_for_each_entry(cur_dev, &dev_list, list) {
827 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
828 if (!rdma_cap_af_ib(cur_dev->device, p))
829 continue;
830
831 if (ib_find_cached_pkey(cur_dev->device, p, pkey, &index))
832 continue;
833
834 if (ib_get_cached_port_state(cur_dev->device, p, &port_state))
835 continue;
836 for (i = 0; !rdma_query_gid(cur_dev->device,
837 p, i, &gid);
838 i++) {
839 if (!memcmp(&gid, dgid, sizeof(gid))) {
840 cma_dev = cur_dev;
841 sgid = gid;
842 id_priv->id.port_num = p;
843 goto found;
844 }
845
846 if (!cma_dev && (gid.global.subnet_prefix ==
847 dgid->global.subnet_prefix) &&
848 port_state == IB_PORT_ACTIVE) {
849 cma_dev = cur_dev;
850 sgid = gid;
851 id_priv->id.port_num = p;
852 goto found;
853 }
854 }
855 }
856 }
857 mutex_unlock(&lock);
858 return -ENODEV;
859
860 found:
861 cma_attach_to_dev(id_priv, cma_dev);
862 mutex_unlock(&lock);
863 addr = (struct sockaddr_ib *)cma_src_addr(id_priv);
864 memcpy(&addr->sib_addr, &sgid, sizeof(sgid));
865 cma_translate_ib(addr, &id_priv->id.route.addr.dev_addr);
866 return 0;
867 }
868
869 static void cma_deref_id(struct rdma_id_private *id_priv)
870 {
871 if (atomic_dec_and_test(&id_priv->refcount))
872 complete(&id_priv->comp);
873 }
874
875 struct rdma_cm_id *__rdma_create_id(struct net *net,
876 rdma_cm_event_handler event_handler,
877 void *context, enum rdma_ucm_port_space ps,
878 enum ib_qp_type qp_type, const char *caller)
879 {
880 struct rdma_id_private *id_priv;
881
882 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
883 if (!id_priv)
884 return ERR_PTR(-ENOMEM);
885
886 rdma_restrack_set_task(&id_priv->res, caller);
887 id_priv->res.type = RDMA_RESTRACK_CM_ID;
888 id_priv->state = RDMA_CM_IDLE;
889 id_priv->id.context = context;
890 id_priv->id.event_handler = event_handler;
891 id_priv->id.ps = ps;
892 id_priv->id.qp_type = qp_type;
893 id_priv->tos_set = false;
894 id_priv->timeout_set = false;
895 id_priv->gid_type = IB_GID_TYPE_IB;
896 spin_lock_init(&id_priv->lock);
897 mutex_init(&id_priv->qp_mutex);
898 init_completion(&id_priv->comp);
899 atomic_set(&id_priv->refcount, 1);
900 mutex_init(&id_priv->handler_mutex);
901 INIT_LIST_HEAD(&id_priv->listen_list);
902 INIT_LIST_HEAD(&id_priv->mc_list);
903 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
904 id_priv->id.route.addr.dev_addr.net = get_net(net);
905 id_priv->seq_num &= 0x00ffffff;
906
907 return &id_priv->id;
908 }
909 EXPORT_SYMBOL(__rdma_create_id);
910
911 static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
912 {
913 struct ib_qp_attr qp_attr;
914 int qp_attr_mask, ret;
915
916 qp_attr.qp_state = IB_QPS_INIT;
917 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
918 if (ret)
919 return ret;
920
921 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
922 if (ret)
923 return ret;
924
925 qp_attr.qp_state = IB_QPS_RTR;
926 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
927 if (ret)
928 return ret;
929
930 qp_attr.qp_state = IB_QPS_RTS;
931 qp_attr.sq_psn = 0;
932 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
933
934 return ret;
935 }
936
937 static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
938 {
939 struct ib_qp_attr qp_attr;
940 int qp_attr_mask, ret;
941
942 qp_attr.qp_state = IB_QPS_INIT;
943 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
944 if (ret)
945 return ret;
946
947 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
948 }
949
950 int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
951 struct ib_qp_init_attr *qp_init_attr)
952 {
953 struct rdma_id_private *id_priv;
954 struct ib_qp *qp;
955 int ret;
956
957 id_priv = container_of(id, struct rdma_id_private, id);
958 if (id->device != pd->device)
959 return -EINVAL;
960
961 qp_init_attr->port_num = id->port_num;
962 qp = ib_create_qp(pd, qp_init_attr);
963 if (IS_ERR(qp))
964 return PTR_ERR(qp);
965
966 if (id->qp_type == IB_QPT_UD)
967 ret = cma_init_ud_qp(id_priv, qp);
968 else
969 ret = cma_init_conn_qp(id_priv, qp);
970 if (ret)
971 goto err;
972
973 id->qp = qp;
974 id_priv->qp_num = qp->qp_num;
975 id_priv->srq = (qp->srq != NULL);
976 return 0;
977 err:
978 ib_destroy_qp(qp);
979 return ret;
980 }
981 EXPORT_SYMBOL(rdma_create_qp);
982
983 void rdma_destroy_qp(struct rdma_cm_id *id)
984 {
985 struct rdma_id_private *id_priv;
986
987 id_priv = container_of(id, struct rdma_id_private, id);
988 mutex_lock(&id_priv->qp_mutex);
989 ib_destroy_qp(id_priv->id.qp);
990 id_priv->id.qp = NULL;
991 mutex_unlock(&id_priv->qp_mutex);
992 }
993 EXPORT_SYMBOL(rdma_destroy_qp);
994
995 static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
996 struct rdma_conn_param *conn_param)
997 {
998 struct ib_qp_attr qp_attr;
999 int qp_attr_mask, ret;
1000
1001 mutex_lock(&id_priv->qp_mutex);
1002 if (!id_priv->id.qp) {
1003 ret = 0;
1004 goto out;
1005 }
1006
1007
1008 qp_attr.qp_state = IB_QPS_INIT;
1009 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
1010 if (ret)
1011 goto out;
1012
1013 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
1014 if (ret)
1015 goto out;
1016
1017 qp_attr.qp_state = IB_QPS_RTR;
1018 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
1019 if (ret)
1020 goto out;
1021
1022 BUG_ON(id_priv->cma_dev->device != id_priv->id.device);
1023
1024 if (conn_param)
1025 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
1026 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
1027 out:
1028 mutex_unlock(&id_priv->qp_mutex);
1029 return ret;
1030 }
1031
1032 static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
1033 struct rdma_conn_param *conn_param)
1034 {
1035 struct ib_qp_attr qp_attr;
1036 int qp_attr_mask, ret;
1037
1038 mutex_lock(&id_priv->qp_mutex);
1039 if (!id_priv->id.qp) {
1040 ret = 0;
1041 goto out;
1042 }
1043
1044 qp_attr.qp_state = IB_QPS_RTS;
1045 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
1046 if (ret)
1047 goto out;
1048
1049 if (conn_param)
1050 qp_attr.max_rd_atomic = conn_param->initiator_depth;
1051 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
1052 out:
1053 mutex_unlock(&id_priv->qp_mutex);
1054 return ret;
1055 }
1056
1057 static int cma_modify_qp_err(struct rdma_id_private *id_priv)
1058 {
1059 struct ib_qp_attr qp_attr;
1060 int ret;
1061
1062 mutex_lock(&id_priv->qp_mutex);
1063 if (!id_priv->id.qp) {
1064 ret = 0;
1065 goto out;
1066 }
1067
1068 qp_attr.qp_state = IB_QPS_ERR;
1069 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
1070 out:
1071 mutex_unlock(&id_priv->qp_mutex);
1072 return ret;
1073 }
1074
1075 static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
1076 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
1077 {
1078 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
1079 int ret;
1080 u16 pkey;
1081
1082 if (rdma_cap_eth_ah(id_priv->id.device, id_priv->id.port_num))
1083 pkey = 0xffff;
1084 else
1085 pkey = ib_addr_get_pkey(dev_addr);
1086
1087 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
1088 pkey, &qp_attr->pkey_index);
1089 if (ret)
1090 return ret;
1091
1092 qp_attr->port_num = id_priv->id.port_num;
1093 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
1094
1095 if (id_priv->id.qp_type == IB_QPT_UD) {
1096 ret = cma_set_qkey(id_priv, 0);
1097 if (ret)
1098 return ret;
1099
1100 qp_attr->qkey = id_priv->qkey;
1101 *qp_attr_mask |= IB_QP_QKEY;
1102 } else {
1103 qp_attr->qp_access_flags = 0;
1104 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
1105 }
1106 return 0;
1107 }
1108
1109 int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
1110 int *qp_attr_mask)
1111 {
1112 struct rdma_id_private *id_priv;
1113 int ret = 0;
1114
1115 id_priv = container_of(id, struct rdma_id_private, id);
1116 if (rdma_cap_ib_cm(id->device, id->port_num)) {
1117 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
1118 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
1119 else
1120 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
1121 qp_attr_mask);
1122
1123 if (qp_attr->qp_state == IB_QPS_RTR)
1124 qp_attr->rq_psn = id_priv->seq_num;
1125 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
1126 if (!id_priv->cm_id.iw) {
1127 qp_attr->qp_access_flags = 0;
1128 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
1129 } else
1130 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
1131 qp_attr_mask);
1132 qp_attr->port_num = id_priv->id.port_num;
1133 *qp_attr_mask |= IB_QP_PORT;
1134 } else
1135 ret = -ENOSYS;
1136
1137 if ((*qp_attr_mask & IB_QP_TIMEOUT) && id_priv->timeout_set)
1138 qp_attr->timeout = id_priv->timeout;
1139
1140 return ret;
1141 }
1142 EXPORT_SYMBOL(rdma_init_qp_attr);
1143
1144 static inline bool cma_zero_addr(const struct sockaddr *addr)
1145 {
1146 switch (addr->sa_family) {
1147 case AF_INET:
1148 return ipv4_is_zeronet(((struct sockaddr_in *)addr)->sin_addr.s_addr);
1149 case AF_INET6:
1150 return ipv6_addr_any(&((struct sockaddr_in6 *)addr)->sin6_addr);
1151 case AF_IB:
1152 return ib_addr_any(&((struct sockaddr_ib *)addr)->sib_addr);
1153 default:
1154 return false;
1155 }
1156 }
1157
1158 static inline bool cma_loopback_addr(const struct sockaddr *addr)
1159 {
1160 switch (addr->sa_family) {
1161 case AF_INET:
1162 return ipv4_is_loopback(
1163 ((struct sockaddr_in *)addr)->sin_addr.s_addr);
1164 case AF_INET6:
1165 return ipv6_addr_loopback(
1166 &((struct sockaddr_in6 *)addr)->sin6_addr);
1167 case AF_IB:
1168 return ib_addr_loopback(
1169 &((struct sockaddr_ib *)addr)->sib_addr);
1170 default:
1171 return false;
1172 }
1173 }
1174
1175 static inline bool cma_any_addr(const struct sockaddr *addr)
1176 {
1177 return cma_zero_addr(addr) || cma_loopback_addr(addr);
1178 }
1179
1180 static int cma_addr_cmp(const struct sockaddr *src, const struct sockaddr *dst)
1181 {
1182 if (src->sa_family != dst->sa_family)
1183 return -1;
1184
1185 switch (src->sa_family) {
1186 case AF_INET:
1187 return ((struct sockaddr_in *)src)->sin_addr.s_addr !=
1188 ((struct sockaddr_in *)dst)->sin_addr.s_addr;
1189 case AF_INET6: {
1190 struct sockaddr_in6 *src_addr6 = (struct sockaddr_in6 *)src;
1191 struct sockaddr_in6 *dst_addr6 = (struct sockaddr_in6 *)dst;
1192 bool link_local;
1193
1194 if (ipv6_addr_cmp(&src_addr6->sin6_addr,
1195 &dst_addr6->sin6_addr))
1196 return 1;
1197 link_local = ipv6_addr_type(&dst_addr6->sin6_addr) &
1198 IPV6_ADDR_LINKLOCAL;
1199
1200 return link_local ? (src_addr6->sin6_scope_id !=
1201 dst_addr6->sin6_scope_id) :
1202 0;
1203 }
1204
1205 default:
1206 return ib_addr_cmp(&((struct sockaddr_ib *) src)->sib_addr,
1207 &((struct sockaddr_ib *) dst)->sib_addr);
1208 }
1209 }
1210
1211 static __be16 cma_port(const struct sockaddr *addr)
1212 {
1213 struct sockaddr_ib *sib;
1214
1215 switch (addr->sa_family) {
1216 case AF_INET:
1217 return ((struct sockaddr_in *) addr)->sin_port;
1218 case AF_INET6:
1219 return ((struct sockaddr_in6 *) addr)->sin6_port;
1220 case AF_IB:
1221 sib = (struct sockaddr_ib *) addr;
1222 return htons((u16) (be64_to_cpu(sib->sib_sid) &
1223 be64_to_cpu(sib->sib_sid_mask)));
1224 default:
1225 return 0;
1226 }
1227 }
1228
1229 static inline int cma_any_port(const struct sockaddr *addr)
1230 {
1231 return !cma_port(addr);
1232 }
1233
1234 static void cma_save_ib_info(struct sockaddr *src_addr,
1235 struct sockaddr *dst_addr,
1236 const struct rdma_cm_id *listen_id,
1237 const struct sa_path_rec *path)
1238 {
1239 struct sockaddr_ib *listen_ib, *ib;
1240
1241 listen_ib = (struct sockaddr_ib *) &listen_id->route.addr.src_addr;
1242 if (src_addr) {
1243 ib = (struct sockaddr_ib *)src_addr;
1244 ib->sib_family = AF_IB;
1245 if (path) {
1246 ib->sib_pkey = path->pkey;
1247 ib->sib_flowinfo = path->flow_label;
1248 memcpy(&ib->sib_addr, &path->sgid, 16);
1249 ib->sib_sid = path->service_id;
1250 ib->sib_scope_id = 0;
1251 } else {
1252 ib->sib_pkey = listen_ib->sib_pkey;
1253 ib->sib_flowinfo = listen_ib->sib_flowinfo;
1254 ib->sib_addr = listen_ib->sib_addr;
1255 ib->sib_sid = listen_ib->sib_sid;
1256 ib->sib_scope_id = listen_ib->sib_scope_id;
1257 }
1258 ib->sib_sid_mask = cpu_to_be64(0xffffffffffffffffULL);
1259 }
1260 if (dst_addr) {
1261 ib = (struct sockaddr_ib *)dst_addr;
1262 ib->sib_family = AF_IB;
1263 if (path) {
1264 ib->sib_pkey = path->pkey;
1265 ib->sib_flowinfo = path->flow_label;
1266 memcpy(&ib->sib_addr, &path->dgid, 16);
1267 }
1268 }
1269 }
1270
1271 static void cma_save_ip4_info(struct sockaddr_in *src_addr,
1272 struct sockaddr_in *dst_addr,
1273 struct cma_hdr *hdr,
1274 __be16 local_port)
1275 {
1276 if (src_addr) {
1277 *src_addr = (struct sockaddr_in) {
1278 .sin_family = AF_INET,
1279 .sin_addr.s_addr = hdr->dst_addr.ip4.addr,
1280 .sin_port = local_port,
1281 };
1282 }
1283
1284 if (dst_addr) {
1285 *dst_addr = (struct sockaddr_in) {
1286 .sin_family = AF_INET,
1287 .sin_addr.s_addr = hdr->src_addr.ip4.addr,
1288 .sin_port = hdr->port,
1289 };
1290 }
1291 }
1292
1293 static void cma_save_ip6_info(struct sockaddr_in6 *src_addr,
1294 struct sockaddr_in6 *dst_addr,
1295 struct cma_hdr *hdr,
1296 __be16 local_port)
1297 {
1298 if (src_addr) {
1299 *src_addr = (struct sockaddr_in6) {
1300 .sin6_family = AF_INET6,
1301 .sin6_addr = hdr->dst_addr.ip6,
1302 .sin6_port = local_port,
1303 };
1304 }
1305
1306 if (dst_addr) {
1307 *dst_addr = (struct sockaddr_in6) {
1308 .sin6_family = AF_INET6,
1309 .sin6_addr = hdr->src_addr.ip6,
1310 .sin6_port = hdr->port,
1311 };
1312 }
1313 }
1314
1315 static u16 cma_port_from_service_id(__be64 service_id)
1316 {
1317 return (u16)be64_to_cpu(service_id);
1318 }
1319
1320 static int cma_save_ip_info(struct sockaddr *src_addr,
1321 struct sockaddr *dst_addr,
1322 const struct ib_cm_event *ib_event,
1323 __be64 service_id)
1324 {
1325 struct cma_hdr *hdr;
1326 __be16 port;
1327
1328 hdr = ib_event->private_data;
1329 if (hdr->cma_version != CMA_VERSION)
1330 return -EINVAL;
1331
1332 port = htons(cma_port_from_service_id(service_id));
1333
1334 switch (cma_get_ip_ver(hdr)) {
1335 case 4:
1336 cma_save_ip4_info((struct sockaddr_in *)src_addr,
1337 (struct sockaddr_in *)dst_addr, hdr, port);
1338 break;
1339 case 6:
1340 cma_save_ip6_info((struct sockaddr_in6 *)src_addr,
1341 (struct sockaddr_in6 *)dst_addr, hdr, port);
1342 break;
1343 default:
1344 return -EAFNOSUPPORT;
1345 }
1346
1347 return 0;
1348 }
1349
1350 static int cma_save_net_info(struct sockaddr *src_addr,
1351 struct sockaddr *dst_addr,
1352 const struct rdma_cm_id *listen_id,
1353 const struct ib_cm_event *ib_event,
1354 sa_family_t sa_family, __be64 service_id)
1355 {
1356 if (sa_family == AF_IB) {
1357 if (ib_event->event == IB_CM_REQ_RECEIVED)
1358 cma_save_ib_info(src_addr, dst_addr, listen_id,
1359 ib_event->param.req_rcvd.primary_path);
1360 else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED)
1361 cma_save_ib_info(src_addr, dst_addr, listen_id, NULL);
1362 return 0;
1363 }
1364
1365 return cma_save_ip_info(src_addr, dst_addr, ib_event, service_id);
1366 }
1367
1368 static int cma_save_req_info(const struct ib_cm_event *ib_event,
1369 struct cma_req_info *req)
1370 {
1371 const struct ib_cm_req_event_param *req_param =
1372 &ib_event->param.req_rcvd;
1373 const struct ib_cm_sidr_req_event_param *sidr_param =
1374 &ib_event->param.sidr_req_rcvd;
1375
1376 switch (ib_event->event) {
1377 case IB_CM_REQ_RECEIVED:
1378 req->device = req_param->listen_id->device;
1379 req->port = req_param->port;
1380 memcpy(&req->local_gid, &req_param->primary_path->sgid,
1381 sizeof(req->local_gid));
1382 req->has_gid = true;
1383 req->service_id = req_param->primary_path->service_id;
1384 req->pkey = be16_to_cpu(req_param->primary_path->pkey);
1385 if (req->pkey != req_param->bth_pkey)
1386 pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and primary path P_Key (0x%x)\n"
1387 "RDMA CMA: in the future this may cause the request to be dropped\n",
1388 req_param->bth_pkey, req->pkey);
1389 break;
1390 case IB_CM_SIDR_REQ_RECEIVED:
1391 req->device = sidr_param->listen_id->device;
1392 req->port = sidr_param->port;
1393 req->has_gid = false;
1394 req->service_id = sidr_param->service_id;
1395 req->pkey = sidr_param->pkey;
1396 if (req->pkey != sidr_param->bth_pkey)
1397 pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and SIDR request payload P_Key (0x%x)\n"
1398 "RDMA CMA: in the future this may cause the request to be dropped\n",
1399 sidr_param->bth_pkey, req->pkey);
1400 break;
1401 default:
1402 return -EINVAL;
1403 }
1404
1405 return 0;
1406 }
1407
1408 static bool validate_ipv4_net_dev(struct net_device *net_dev,
1409 const struct sockaddr_in *dst_addr,
1410 const struct sockaddr_in *src_addr)
1411 {
1412 __be32 daddr = dst_addr->sin_addr.s_addr,
1413 saddr = src_addr->sin_addr.s_addr;
1414 struct fib_result res;
1415 struct flowi4 fl4;
1416 int err;
1417 bool ret;
1418
1419 if (ipv4_is_multicast(saddr) || ipv4_is_lbcast(saddr) ||
1420 ipv4_is_lbcast(daddr) || ipv4_is_zeronet(saddr) ||
1421 ipv4_is_zeronet(daddr) || ipv4_is_loopback(daddr) ||
1422 ipv4_is_loopback(saddr))
1423 return false;
1424
1425 memset(&fl4, 0, sizeof(fl4));
1426 fl4.flowi4_iif = net_dev->ifindex;
1427 fl4.daddr = daddr;
1428 fl4.saddr = saddr;
1429
1430 rcu_read_lock();
1431 err = fib_lookup(dev_net(net_dev), &fl4, &res, 0);
1432 ret = err == 0 && FIB_RES_DEV(res) == net_dev;
1433 rcu_read_unlock();
1434
1435 return ret;
1436 }
1437
1438 static bool validate_ipv6_net_dev(struct net_device *net_dev,
1439 const struct sockaddr_in6 *dst_addr,
1440 const struct sockaddr_in6 *src_addr)
1441 {
1442 #if IS_ENABLED(CONFIG_IPV6)
1443 const int strict = ipv6_addr_type(&dst_addr->sin6_addr) &
1444 IPV6_ADDR_LINKLOCAL;
1445 struct rt6_info *rt = rt6_lookup(dev_net(net_dev), &dst_addr->sin6_addr,
1446 &src_addr->sin6_addr, net_dev->ifindex,
1447 NULL, strict);
1448 bool ret;
1449
1450 if (!rt)
1451 return false;
1452
1453 ret = rt->rt6i_idev->dev == net_dev;
1454 ip6_rt_put(rt);
1455
1456 return ret;
1457 #else
1458 return false;
1459 #endif
1460 }
1461
1462 static bool validate_net_dev(struct net_device *net_dev,
1463 const struct sockaddr *daddr,
1464 const struct sockaddr *saddr)
1465 {
1466 const struct sockaddr_in *daddr4 = (const struct sockaddr_in *)daddr;
1467 const struct sockaddr_in *saddr4 = (const struct sockaddr_in *)saddr;
1468 const struct sockaddr_in6 *daddr6 = (const struct sockaddr_in6 *)daddr;
1469 const struct sockaddr_in6 *saddr6 = (const struct sockaddr_in6 *)saddr;
1470
1471 switch (daddr->sa_family) {
1472 case AF_INET:
1473 return saddr->sa_family == AF_INET &&
1474 validate_ipv4_net_dev(net_dev, daddr4, saddr4);
1475
1476 case AF_INET6:
1477 return saddr->sa_family == AF_INET6 &&
1478 validate_ipv6_net_dev(net_dev, daddr6, saddr6);
1479
1480 default:
1481 return false;
1482 }
1483 }
1484
1485 static struct net_device *
1486 roce_get_net_dev_by_cm_event(const struct ib_cm_event *ib_event)
1487 {
1488 const struct ib_gid_attr *sgid_attr = NULL;
1489 struct net_device *ndev;
1490
1491 if (ib_event->event == IB_CM_REQ_RECEIVED)
1492 sgid_attr = ib_event->param.req_rcvd.ppath_sgid_attr;
1493 else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED)
1494 sgid_attr = ib_event->param.sidr_req_rcvd.sgid_attr;
1495
1496 if (!sgid_attr)
1497 return NULL;
1498
1499 rcu_read_lock();
1500 ndev = rdma_read_gid_attr_ndev_rcu(sgid_attr);
1501 if (IS_ERR(ndev))
1502 ndev = NULL;
1503 else
1504 dev_hold(ndev);
1505 rcu_read_unlock();
1506 return ndev;
1507 }
1508
1509 static struct net_device *cma_get_net_dev(const struct ib_cm_event *ib_event,
1510 struct cma_req_info *req)
1511 {
1512 struct sockaddr *listen_addr =
1513 (struct sockaddr *)&req->listen_addr_storage;
1514 struct sockaddr *src_addr = (struct sockaddr *)&req->src_addr_storage;
1515 struct net_device *net_dev;
1516 const union ib_gid *gid = req->has_gid ? &req->local_gid : NULL;
1517 int err;
1518
1519 err = cma_save_ip_info(listen_addr, src_addr, ib_event,
1520 req->service_id);
1521 if (err)
1522 return ERR_PTR(err);
1523
1524 if (rdma_protocol_roce(req->device, req->port))
1525 net_dev = roce_get_net_dev_by_cm_event(ib_event);
1526 else
1527 net_dev = ib_get_net_dev_by_params(req->device, req->port,
1528 req->pkey,
1529 gid, listen_addr);
1530 if (!net_dev)
1531 return ERR_PTR(-ENODEV);
1532
1533 return net_dev;
1534 }
1535
1536 static enum rdma_ucm_port_space rdma_ps_from_service_id(__be64 service_id)
1537 {
1538 return (be64_to_cpu(service_id) >> 16) & 0xffff;
1539 }
1540
1541 static bool cma_match_private_data(struct rdma_id_private *id_priv,
1542 const struct cma_hdr *hdr)
1543 {
1544 struct sockaddr *addr = cma_src_addr(id_priv);
1545 __be32 ip4_addr;
1546 struct in6_addr ip6_addr;
1547
1548 if (cma_any_addr(addr) && !id_priv->afonly)
1549 return true;
1550
1551 switch (addr->sa_family) {
1552 case AF_INET:
1553 ip4_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
1554 if (cma_get_ip_ver(hdr) != 4)
1555 return false;
1556 if (!cma_any_addr(addr) &&
1557 hdr->dst_addr.ip4.addr != ip4_addr)
1558 return false;
1559 break;
1560 case AF_INET6:
1561 ip6_addr = ((struct sockaddr_in6 *)addr)->sin6_addr;
1562 if (cma_get_ip_ver(hdr) != 6)
1563 return false;
1564 if (!cma_any_addr(addr) &&
1565 memcmp(&hdr->dst_addr.ip6, &ip6_addr, sizeof(ip6_addr)))
1566 return false;
1567 break;
1568 case AF_IB:
1569 return true;
1570 default:
1571 return false;
1572 }
1573
1574 return true;
1575 }
1576
1577 static bool cma_protocol_roce(const struct rdma_cm_id *id)
1578 {
1579 struct ib_device *device = id->device;
1580 const int port_num = id->port_num ?: rdma_start_port(device);
1581
1582 return rdma_protocol_roce(device, port_num);
1583 }
1584
1585 static bool cma_is_req_ipv6_ll(const struct cma_req_info *req)
1586 {
1587 const struct sockaddr *daddr =
1588 (const struct sockaddr *)&req->listen_addr_storage;
1589 const struct sockaddr_in6 *daddr6 = (const struct sockaddr_in6 *)daddr;
1590
1591
1592 return (daddr->sa_family == AF_INET6 &&
1593 (ipv6_addr_type(&daddr6->sin6_addr) & IPV6_ADDR_LINKLOCAL));
1594 }
1595
1596 static bool cma_match_net_dev(const struct rdma_cm_id *id,
1597 const struct net_device *net_dev,
1598 const struct cma_req_info *req)
1599 {
1600 const struct rdma_addr *addr = &id->route.addr;
1601
1602 if (!net_dev)
1603
1604 return (!id->port_num || id->port_num == req->port) &&
1605 (addr->src_addr.ss_family == AF_IB);
1606
1607
1608
1609
1610
1611 if (!cma_is_req_ipv6_ll(req))
1612 return true;
1613
1614
1615
1616
1617 if (net_eq(dev_net(net_dev), addr->dev_addr.net) &&
1618 (!!addr->dev_addr.bound_dev_if ==
1619 (addr->dev_addr.bound_dev_if == net_dev->ifindex)))
1620 return true;
1621 else
1622 return false;
1623 }
1624
1625 static struct rdma_id_private *cma_find_listener(
1626 const struct rdma_bind_list *bind_list,
1627 const struct ib_cm_id *cm_id,
1628 const struct ib_cm_event *ib_event,
1629 const struct cma_req_info *req,
1630 const struct net_device *net_dev)
1631 {
1632 struct rdma_id_private *id_priv, *id_priv_dev;
1633
1634 if (!bind_list)
1635 return ERR_PTR(-EINVAL);
1636
1637 hlist_for_each_entry(id_priv, &bind_list->owners, node) {
1638 if (cma_match_private_data(id_priv, ib_event->private_data)) {
1639 if (id_priv->id.device == cm_id->device &&
1640 cma_match_net_dev(&id_priv->id, net_dev, req))
1641 return id_priv;
1642 list_for_each_entry(id_priv_dev,
1643 &id_priv->listen_list,
1644 listen_list) {
1645 if (id_priv_dev->id.device == cm_id->device &&
1646 cma_match_net_dev(&id_priv_dev->id,
1647 net_dev, req))
1648 return id_priv_dev;
1649 }
1650 }
1651 }
1652
1653 return ERR_PTR(-EINVAL);
1654 }
1655
1656 static struct rdma_id_private *
1657 cma_ib_id_from_event(struct ib_cm_id *cm_id,
1658 const struct ib_cm_event *ib_event,
1659 struct cma_req_info *req,
1660 struct net_device **net_dev)
1661 {
1662 struct rdma_bind_list *bind_list;
1663 struct rdma_id_private *id_priv;
1664 int err;
1665
1666 err = cma_save_req_info(ib_event, req);
1667 if (err)
1668 return ERR_PTR(err);
1669
1670 *net_dev = cma_get_net_dev(ib_event, req);
1671 if (IS_ERR(*net_dev)) {
1672 if (PTR_ERR(*net_dev) == -EAFNOSUPPORT) {
1673
1674 *net_dev = NULL;
1675 } else {
1676 return ERR_CAST(*net_dev);
1677 }
1678 }
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694 rcu_read_lock();
1695 if (*net_dev) {
1696
1697
1698
1699
1700
1701
1702 if (((*net_dev)->flags & IFF_UP) == 0) {
1703 id_priv = ERR_PTR(-EHOSTUNREACH);
1704 goto err;
1705 }
1706
1707 if (!validate_net_dev(*net_dev,
1708 (struct sockaddr *)&req->listen_addr_storage,
1709 (struct sockaddr *)&req->src_addr_storage)) {
1710 id_priv = ERR_PTR(-EHOSTUNREACH);
1711 goto err;
1712 }
1713 }
1714
1715 bind_list = cma_ps_find(*net_dev ? dev_net(*net_dev) : &init_net,
1716 rdma_ps_from_service_id(req->service_id),
1717 cma_port_from_service_id(req->service_id));
1718 id_priv = cma_find_listener(bind_list, cm_id, ib_event, req, *net_dev);
1719 err:
1720 rcu_read_unlock();
1721 if (IS_ERR(id_priv) && *net_dev) {
1722 dev_put(*net_dev);
1723 *net_dev = NULL;
1724 }
1725 return id_priv;
1726 }
1727
1728 static inline u8 cma_user_data_offset(struct rdma_id_private *id_priv)
1729 {
1730 return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr);
1731 }
1732
1733 static void cma_cancel_route(struct rdma_id_private *id_priv)
1734 {
1735 if (rdma_cap_ib_sa(id_priv->id.device, id_priv->id.port_num)) {
1736 if (id_priv->query)
1737 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
1738 }
1739 }
1740
1741 static void cma_cancel_listens(struct rdma_id_private *id_priv)
1742 {
1743 struct rdma_id_private *dev_id_priv;
1744
1745
1746
1747
1748
1749 mutex_lock(&lock);
1750 list_del(&id_priv->list);
1751
1752 while (!list_empty(&id_priv->listen_list)) {
1753 dev_id_priv = list_entry(id_priv->listen_list.next,
1754 struct rdma_id_private, listen_list);
1755
1756 list_del_init(&dev_id_priv->list);
1757 list_del(&dev_id_priv->listen_list);
1758 mutex_unlock(&lock);
1759
1760 rdma_destroy_id(&dev_id_priv->id);
1761 mutex_lock(&lock);
1762 }
1763 mutex_unlock(&lock);
1764 }
1765
1766 static void cma_cancel_operation(struct rdma_id_private *id_priv,
1767 enum rdma_cm_state state)
1768 {
1769 switch (state) {
1770 case RDMA_CM_ADDR_QUERY:
1771 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
1772 break;
1773 case RDMA_CM_ROUTE_QUERY:
1774 cma_cancel_route(id_priv);
1775 break;
1776 case RDMA_CM_LISTEN:
1777 if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev)
1778 cma_cancel_listens(id_priv);
1779 break;
1780 default:
1781 break;
1782 }
1783 }
1784
1785 static void cma_release_port(struct rdma_id_private *id_priv)
1786 {
1787 struct rdma_bind_list *bind_list = id_priv->bind_list;
1788 struct net *net = id_priv->id.route.addr.dev_addr.net;
1789
1790 if (!bind_list)
1791 return;
1792
1793 mutex_lock(&lock);
1794 hlist_del(&id_priv->node);
1795 if (hlist_empty(&bind_list->owners)) {
1796 cma_ps_remove(net, bind_list->ps, bind_list->port);
1797 kfree(bind_list);
1798 }
1799 mutex_unlock(&lock);
1800 }
1801
1802 static void cma_leave_roce_mc_group(struct rdma_id_private *id_priv,
1803 struct cma_multicast *mc)
1804 {
1805 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
1806 struct net_device *ndev = NULL;
1807
1808 if (dev_addr->bound_dev_if)
1809 ndev = dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
1810 if (ndev) {
1811 cma_igmp_send(ndev, &mc->multicast.ib->rec.mgid, false);
1812 dev_put(ndev);
1813 }
1814 kref_put(&mc->mcref, release_mc);
1815 }
1816
1817 static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
1818 {
1819 struct cma_multicast *mc;
1820
1821 while (!list_empty(&id_priv->mc_list)) {
1822 mc = container_of(id_priv->mc_list.next,
1823 struct cma_multicast, list);
1824 list_del(&mc->list);
1825 if (rdma_cap_ib_mcast(id_priv->cma_dev->device,
1826 id_priv->id.port_num)) {
1827 ib_sa_free_multicast(mc->multicast.ib);
1828 kfree(mc);
1829 } else {
1830 cma_leave_roce_mc_group(id_priv, mc);
1831 }
1832 }
1833 }
1834
1835 void rdma_destroy_id(struct rdma_cm_id *id)
1836 {
1837 struct rdma_id_private *id_priv;
1838 enum rdma_cm_state state;
1839
1840 id_priv = container_of(id, struct rdma_id_private, id);
1841 state = cma_exch(id_priv, RDMA_CM_DESTROYING);
1842 cma_cancel_operation(id_priv, state);
1843
1844
1845
1846
1847
1848 mutex_lock(&id_priv->handler_mutex);
1849 mutex_unlock(&id_priv->handler_mutex);
1850
1851 rdma_restrack_del(&id_priv->res);
1852 if (id_priv->cma_dev) {
1853 if (rdma_cap_ib_cm(id_priv->id.device, 1)) {
1854 if (id_priv->cm_id.ib)
1855 ib_destroy_cm_id(id_priv->cm_id.ib);
1856 } else if (rdma_cap_iw_cm(id_priv->id.device, 1)) {
1857 if (id_priv->cm_id.iw)
1858 iw_destroy_cm_id(id_priv->cm_id.iw);
1859 }
1860 cma_leave_mc_groups(id_priv);
1861 cma_release_dev(id_priv);
1862 }
1863
1864 cma_release_port(id_priv);
1865 cma_deref_id(id_priv);
1866 wait_for_completion(&id_priv->comp);
1867
1868 if (id_priv->internal_id)
1869 cma_deref_id(id_priv->id.context);
1870
1871 kfree(id_priv->id.route.path_rec);
1872
1873 if (id_priv->id.route.addr.dev_addr.sgid_attr)
1874 rdma_put_gid_attr(id_priv->id.route.addr.dev_addr.sgid_attr);
1875
1876 put_net(id_priv->id.route.addr.dev_addr.net);
1877 kfree(id_priv);
1878 }
1879 EXPORT_SYMBOL(rdma_destroy_id);
1880
1881 static int cma_rep_recv(struct rdma_id_private *id_priv)
1882 {
1883 int ret;
1884
1885 ret = cma_modify_qp_rtr(id_priv, NULL);
1886 if (ret)
1887 goto reject;
1888
1889 ret = cma_modify_qp_rts(id_priv, NULL);
1890 if (ret)
1891 goto reject;
1892
1893 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
1894 if (ret)
1895 goto reject;
1896
1897 return 0;
1898 reject:
1899 pr_debug_ratelimited("RDMA CM: CONNECT_ERROR: failed to handle reply. status %d\n", ret);
1900 cma_modify_qp_err(id_priv);
1901 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
1902 NULL, 0, NULL, 0);
1903 return ret;
1904 }
1905
1906 static void cma_set_rep_event_data(struct rdma_cm_event *event,
1907 const struct ib_cm_rep_event_param *rep_data,
1908 void *private_data)
1909 {
1910 event->param.conn.private_data = private_data;
1911 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
1912 event->param.conn.responder_resources = rep_data->responder_resources;
1913 event->param.conn.initiator_depth = rep_data->initiator_depth;
1914 event->param.conn.flow_control = rep_data->flow_control;
1915 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
1916 event->param.conn.srq = rep_data->srq;
1917 event->param.conn.qp_num = rep_data->remote_qpn;
1918 }
1919
1920 static int cma_ib_handler(struct ib_cm_id *cm_id,
1921 const struct ib_cm_event *ib_event)
1922 {
1923 struct rdma_id_private *id_priv = cm_id->context;
1924 struct rdma_cm_event event = {};
1925 int ret = 0;
1926
1927 mutex_lock(&id_priv->handler_mutex);
1928 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
1929 id_priv->state != RDMA_CM_CONNECT) ||
1930 (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
1931 id_priv->state != RDMA_CM_DISCONNECT))
1932 goto out;
1933
1934 switch (ib_event->event) {
1935 case IB_CM_REQ_ERROR:
1936 case IB_CM_REP_ERROR:
1937 event.event = RDMA_CM_EVENT_UNREACHABLE;
1938 event.status = -ETIMEDOUT;
1939 break;
1940 case IB_CM_REP_RECEIVED:
1941 if (cma_comp(id_priv, RDMA_CM_CONNECT) &&
1942 (id_priv->id.qp_type != IB_QPT_UD))
1943 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1944 if (id_priv->id.qp) {
1945 event.status = cma_rep_recv(id_priv);
1946 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1947 RDMA_CM_EVENT_ESTABLISHED;
1948 } else {
1949 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
1950 }
1951 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1952 ib_event->private_data);
1953 break;
1954 case IB_CM_RTU_RECEIVED:
1955 case IB_CM_USER_ESTABLISHED:
1956 event.event = RDMA_CM_EVENT_ESTABLISHED;
1957 break;
1958 case IB_CM_DREQ_ERROR:
1959 event.status = -ETIMEDOUT;
1960 case IB_CM_DREQ_RECEIVED:
1961 case IB_CM_DREP_RECEIVED:
1962 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
1963 RDMA_CM_DISCONNECT))
1964 goto out;
1965 event.event = RDMA_CM_EVENT_DISCONNECTED;
1966 break;
1967 case IB_CM_TIMEWAIT_EXIT:
1968 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1969 break;
1970 case IB_CM_MRA_RECEIVED:
1971
1972 goto out;
1973 case IB_CM_REJ_RECEIVED:
1974 pr_debug_ratelimited("RDMA CM: REJECTED: %s\n", rdma_reject_msg(&id_priv->id,
1975 ib_event->param.rej_rcvd.reason));
1976 cma_modify_qp_err(id_priv);
1977 event.status = ib_event->param.rej_rcvd.reason;
1978 event.event = RDMA_CM_EVENT_REJECTED;
1979 event.param.conn.private_data = ib_event->private_data;
1980 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
1981 break;
1982 default:
1983 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
1984 ib_event->event);
1985 goto out;
1986 }
1987
1988 ret = id_priv->id.event_handler(&id_priv->id, &event);
1989 if (ret) {
1990
1991 id_priv->cm_id.ib = NULL;
1992 cma_exch(id_priv, RDMA_CM_DESTROYING);
1993 mutex_unlock(&id_priv->handler_mutex);
1994 rdma_destroy_id(&id_priv->id);
1995 return ret;
1996 }
1997 out:
1998 mutex_unlock(&id_priv->handler_mutex);
1999 return ret;
2000 }
2001
2002 static struct rdma_id_private *
2003 cma_ib_new_conn_id(const struct rdma_cm_id *listen_id,
2004 const struct ib_cm_event *ib_event,
2005 struct net_device *net_dev)
2006 {
2007 struct rdma_id_private *listen_id_priv;
2008 struct rdma_id_private *id_priv;
2009 struct rdma_cm_id *id;
2010 struct rdma_route *rt;
2011 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
2012 struct sa_path_rec *path = ib_event->param.req_rcvd.primary_path;
2013 const __be64 service_id =
2014 ib_event->param.req_rcvd.primary_path->service_id;
2015 int ret;
2016
2017 listen_id_priv = container_of(listen_id, struct rdma_id_private, id);
2018 id = __rdma_create_id(listen_id->route.addr.dev_addr.net,
2019 listen_id->event_handler, listen_id->context,
2020 listen_id->ps, ib_event->param.req_rcvd.qp_type,
2021 listen_id_priv->res.kern_name);
2022 if (IS_ERR(id))
2023 return NULL;
2024
2025 id_priv = container_of(id, struct rdma_id_private, id);
2026 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
2027 (struct sockaddr *)&id->route.addr.dst_addr,
2028 listen_id, ib_event, ss_family, service_id))
2029 goto err;
2030
2031 rt = &id->route;
2032 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
2033 rt->path_rec = kmalloc_array(rt->num_paths, sizeof(*rt->path_rec),
2034 GFP_KERNEL);
2035 if (!rt->path_rec)
2036 goto err;
2037
2038 rt->path_rec[0] = *path;
2039 if (rt->num_paths == 2)
2040 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
2041
2042 if (net_dev) {
2043 rdma_copy_src_l2_addr(&rt->addr.dev_addr, net_dev);
2044 } else {
2045 if (!cma_protocol_roce(listen_id) &&
2046 cma_any_addr(cma_src_addr(id_priv))) {
2047 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
2048 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
2049 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
2050 } else if (!cma_any_addr(cma_src_addr(id_priv))) {
2051 ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr);
2052 if (ret)
2053 goto err;
2054 }
2055 }
2056 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
2057
2058 id_priv->state = RDMA_CM_CONNECT;
2059 return id_priv;
2060
2061 err:
2062 rdma_destroy_id(id);
2063 return NULL;
2064 }
2065
2066 static struct rdma_id_private *
2067 cma_ib_new_udp_id(const struct rdma_cm_id *listen_id,
2068 const struct ib_cm_event *ib_event,
2069 struct net_device *net_dev)
2070 {
2071 const struct rdma_id_private *listen_id_priv;
2072 struct rdma_id_private *id_priv;
2073 struct rdma_cm_id *id;
2074 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
2075 struct net *net = listen_id->route.addr.dev_addr.net;
2076 int ret;
2077
2078 listen_id_priv = container_of(listen_id, struct rdma_id_private, id);
2079 id = __rdma_create_id(net, listen_id->event_handler, listen_id->context,
2080 listen_id->ps, IB_QPT_UD,
2081 listen_id_priv->res.kern_name);
2082 if (IS_ERR(id))
2083 return NULL;
2084
2085 id_priv = container_of(id, struct rdma_id_private, id);
2086 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
2087 (struct sockaddr *)&id->route.addr.dst_addr,
2088 listen_id, ib_event, ss_family,
2089 ib_event->param.sidr_req_rcvd.service_id))
2090 goto err;
2091
2092 if (net_dev) {
2093 rdma_copy_src_l2_addr(&id->route.addr.dev_addr, net_dev);
2094 } else {
2095 if (!cma_any_addr(cma_src_addr(id_priv))) {
2096 ret = cma_translate_addr(cma_src_addr(id_priv),
2097 &id->route.addr.dev_addr);
2098 if (ret)
2099 goto err;
2100 }
2101 }
2102
2103 id_priv->state = RDMA_CM_CONNECT;
2104 return id_priv;
2105 err:
2106 rdma_destroy_id(id);
2107 return NULL;
2108 }
2109
2110 static void cma_set_req_event_data(struct rdma_cm_event *event,
2111 const struct ib_cm_req_event_param *req_data,
2112 void *private_data, int offset)
2113 {
2114 event->param.conn.private_data = private_data + offset;
2115 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
2116 event->param.conn.responder_resources = req_data->responder_resources;
2117 event->param.conn.initiator_depth = req_data->initiator_depth;
2118 event->param.conn.flow_control = req_data->flow_control;
2119 event->param.conn.retry_count = req_data->retry_count;
2120 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
2121 event->param.conn.srq = req_data->srq;
2122 event->param.conn.qp_num = req_data->remote_qpn;
2123 }
2124
2125 static int cma_ib_check_req_qp_type(const struct rdma_cm_id *id,
2126 const struct ib_cm_event *ib_event)
2127 {
2128 return (((ib_event->event == IB_CM_REQ_RECEIVED) &&
2129 (ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
2130 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
2131 (id->qp_type == IB_QPT_UD)) ||
2132 (!id->qp_type));
2133 }
2134
2135 static int cma_ib_req_handler(struct ib_cm_id *cm_id,
2136 const struct ib_cm_event *ib_event)
2137 {
2138 struct rdma_id_private *listen_id, *conn_id = NULL;
2139 struct rdma_cm_event event = {};
2140 struct cma_req_info req = {};
2141 struct net_device *net_dev;
2142 u8 offset;
2143 int ret;
2144
2145 listen_id = cma_ib_id_from_event(cm_id, ib_event, &req, &net_dev);
2146 if (IS_ERR(listen_id))
2147 return PTR_ERR(listen_id);
2148
2149 if (!cma_ib_check_req_qp_type(&listen_id->id, ib_event)) {
2150 ret = -EINVAL;
2151 goto net_dev_put;
2152 }
2153
2154 mutex_lock(&listen_id->handler_mutex);
2155 if (listen_id->state != RDMA_CM_LISTEN) {
2156 ret = -ECONNABORTED;
2157 goto err1;
2158 }
2159
2160 offset = cma_user_data_offset(listen_id);
2161 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
2162 if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
2163 conn_id = cma_ib_new_udp_id(&listen_id->id, ib_event, net_dev);
2164 event.param.ud.private_data = ib_event->private_data + offset;
2165 event.param.ud.private_data_len =
2166 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
2167 } else {
2168 conn_id = cma_ib_new_conn_id(&listen_id->id, ib_event, net_dev);
2169 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
2170 ib_event->private_data, offset);
2171 }
2172 if (!conn_id) {
2173 ret = -ENOMEM;
2174 goto err1;
2175 }
2176
2177 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
2178 ret = cma_ib_acquire_dev(conn_id, listen_id, &req);
2179 if (ret)
2180 goto err2;
2181
2182 conn_id->cm_id.ib = cm_id;
2183 cm_id->context = conn_id;
2184 cm_id->cm_handler = cma_ib_handler;
2185
2186
2187
2188
2189
2190 atomic_inc(&conn_id->refcount);
2191 ret = conn_id->id.event_handler(&conn_id->id, &event);
2192 if (ret)
2193 goto err3;
2194
2195
2196
2197
2198 mutex_lock(&lock);
2199 if (cma_comp(conn_id, RDMA_CM_CONNECT) &&
2200 (conn_id->id.qp_type != IB_QPT_UD))
2201 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
2202 mutex_unlock(&lock);
2203 mutex_unlock(&conn_id->handler_mutex);
2204 mutex_unlock(&listen_id->handler_mutex);
2205 cma_deref_id(conn_id);
2206 if (net_dev)
2207 dev_put(net_dev);
2208 return 0;
2209
2210 err3:
2211 cma_deref_id(conn_id);
2212
2213 conn_id->cm_id.ib = NULL;
2214 err2:
2215 cma_exch(conn_id, RDMA_CM_DESTROYING);
2216 mutex_unlock(&conn_id->handler_mutex);
2217 err1:
2218 mutex_unlock(&listen_id->handler_mutex);
2219 if (conn_id)
2220 rdma_destroy_id(&conn_id->id);
2221
2222 net_dev_put:
2223 if (net_dev)
2224 dev_put(net_dev);
2225
2226 return ret;
2227 }
2228
2229 __be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr)
2230 {
2231 if (addr->sa_family == AF_IB)
2232 return ((struct sockaddr_ib *) addr)->sib_sid;
2233
2234 return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr)));
2235 }
2236 EXPORT_SYMBOL(rdma_get_service_id);
2237
2238 void rdma_read_gids(struct rdma_cm_id *cm_id, union ib_gid *sgid,
2239 union ib_gid *dgid)
2240 {
2241 struct rdma_addr *addr = &cm_id->route.addr;
2242
2243 if (!cm_id->device) {
2244 if (sgid)
2245 memset(sgid, 0, sizeof(*sgid));
2246 if (dgid)
2247 memset(dgid, 0, sizeof(*dgid));
2248 return;
2249 }
2250
2251 if (rdma_protocol_roce(cm_id->device, cm_id->port_num)) {
2252 if (sgid)
2253 rdma_ip2gid((struct sockaddr *)&addr->src_addr, sgid);
2254 if (dgid)
2255 rdma_ip2gid((struct sockaddr *)&addr->dst_addr, dgid);
2256 } else {
2257 if (sgid)
2258 rdma_addr_get_sgid(&addr->dev_addr, sgid);
2259 if (dgid)
2260 rdma_addr_get_dgid(&addr->dev_addr, dgid);
2261 }
2262 }
2263 EXPORT_SYMBOL(rdma_read_gids);
2264
2265 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
2266 {
2267 struct rdma_id_private *id_priv = iw_id->context;
2268 struct rdma_cm_event event = {};
2269 int ret = 0;
2270 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
2271 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
2272
2273 mutex_lock(&id_priv->handler_mutex);
2274 if (id_priv->state != RDMA_CM_CONNECT)
2275 goto out;
2276
2277 switch (iw_event->event) {
2278 case IW_CM_EVENT_CLOSE:
2279 event.event = RDMA_CM_EVENT_DISCONNECTED;
2280 break;
2281 case IW_CM_EVENT_CONNECT_REPLY:
2282 memcpy(cma_src_addr(id_priv), laddr,
2283 rdma_addr_size(laddr));
2284 memcpy(cma_dst_addr(id_priv), raddr,
2285 rdma_addr_size(raddr));
2286 switch (iw_event->status) {
2287 case 0:
2288 event.event = RDMA_CM_EVENT_ESTABLISHED;
2289 event.param.conn.initiator_depth = iw_event->ird;
2290 event.param.conn.responder_resources = iw_event->ord;
2291 break;
2292 case -ECONNRESET:
2293 case -ECONNREFUSED:
2294 event.event = RDMA_CM_EVENT_REJECTED;
2295 break;
2296 case -ETIMEDOUT:
2297 event.event = RDMA_CM_EVENT_UNREACHABLE;
2298 break;
2299 default:
2300 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
2301 break;
2302 }
2303 break;
2304 case IW_CM_EVENT_ESTABLISHED:
2305 event.event = RDMA_CM_EVENT_ESTABLISHED;
2306 event.param.conn.initiator_depth = iw_event->ird;
2307 event.param.conn.responder_resources = iw_event->ord;
2308 break;
2309 default:
2310 goto out;
2311 }
2312
2313 event.status = iw_event->status;
2314 event.param.conn.private_data = iw_event->private_data;
2315 event.param.conn.private_data_len = iw_event->private_data_len;
2316 ret = id_priv->id.event_handler(&id_priv->id, &event);
2317 if (ret) {
2318
2319 id_priv->cm_id.iw = NULL;
2320 cma_exch(id_priv, RDMA_CM_DESTROYING);
2321 mutex_unlock(&id_priv->handler_mutex);
2322 rdma_destroy_id(&id_priv->id);
2323 return ret;
2324 }
2325
2326 out:
2327 mutex_unlock(&id_priv->handler_mutex);
2328 return ret;
2329 }
2330
2331 static int iw_conn_req_handler(struct iw_cm_id *cm_id,
2332 struct iw_cm_event *iw_event)
2333 {
2334 struct rdma_cm_id *new_cm_id;
2335 struct rdma_id_private *listen_id, *conn_id;
2336 struct rdma_cm_event event = {};
2337 int ret = -ECONNABORTED;
2338 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
2339 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
2340
2341 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
2342 event.param.conn.private_data = iw_event->private_data;
2343 event.param.conn.private_data_len = iw_event->private_data_len;
2344 event.param.conn.initiator_depth = iw_event->ird;
2345 event.param.conn.responder_resources = iw_event->ord;
2346
2347 listen_id = cm_id->context;
2348
2349 mutex_lock(&listen_id->handler_mutex);
2350 if (listen_id->state != RDMA_CM_LISTEN)
2351 goto out;
2352
2353
2354 new_cm_id = __rdma_create_id(listen_id->id.route.addr.dev_addr.net,
2355 listen_id->id.event_handler,
2356 listen_id->id.context,
2357 RDMA_PS_TCP, IB_QPT_RC,
2358 listen_id->res.kern_name);
2359 if (IS_ERR(new_cm_id)) {
2360 ret = -ENOMEM;
2361 goto out;
2362 }
2363 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
2364 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
2365 conn_id->state = RDMA_CM_CONNECT;
2366
2367 ret = rdma_translate_ip(laddr, &conn_id->id.route.addr.dev_addr);
2368 if (ret) {
2369 mutex_unlock(&conn_id->handler_mutex);
2370 rdma_destroy_id(new_cm_id);
2371 goto out;
2372 }
2373
2374 ret = cma_iw_acquire_dev(conn_id, listen_id);
2375 if (ret) {
2376 mutex_unlock(&conn_id->handler_mutex);
2377 rdma_destroy_id(new_cm_id);
2378 goto out;
2379 }
2380
2381 conn_id->cm_id.iw = cm_id;
2382 cm_id->context = conn_id;
2383 cm_id->cm_handler = cma_iw_handler;
2384
2385 memcpy(cma_src_addr(conn_id), laddr, rdma_addr_size(laddr));
2386 memcpy(cma_dst_addr(conn_id), raddr, rdma_addr_size(raddr));
2387
2388
2389
2390
2391
2392 atomic_inc(&conn_id->refcount);
2393 ret = conn_id->id.event_handler(&conn_id->id, &event);
2394 if (ret) {
2395
2396 conn_id->cm_id.iw = NULL;
2397 cma_exch(conn_id, RDMA_CM_DESTROYING);
2398 mutex_unlock(&conn_id->handler_mutex);
2399 mutex_unlock(&listen_id->handler_mutex);
2400 cma_deref_id(conn_id);
2401 rdma_destroy_id(&conn_id->id);
2402 return ret;
2403 }
2404
2405 mutex_unlock(&conn_id->handler_mutex);
2406 cma_deref_id(conn_id);
2407
2408 out:
2409 mutex_unlock(&listen_id->handler_mutex);
2410 return ret;
2411 }
2412
2413 static int cma_ib_listen(struct rdma_id_private *id_priv)
2414 {
2415 struct sockaddr *addr;
2416 struct ib_cm_id *id;
2417 __be64 svc_id;
2418
2419 addr = cma_src_addr(id_priv);
2420 svc_id = rdma_get_service_id(&id_priv->id, addr);
2421 id = ib_cm_insert_listen(id_priv->id.device,
2422 cma_ib_req_handler, svc_id);
2423 if (IS_ERR(id))
2424 return PTR_ERR(id);
2425 id_priv->cm_id.ib = id;
2426
2427 return 0;
2428 }
2429
2430 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
2431 {
2432 int ret;
2433 struct iw_cm_id *id;
2434
2435 id = iw_create_cm_id(id_priv->id.device,
2436 iw_conn_req_handler,
2437 id_priv);
2438 if (IS_ERR(id))
2439 return PTR_ERR(id);
2440
2441 id->tos = id_priv->tos;
2442 id->tos_set = id_priv->tos_set;
2443 id_priv->cm_id.iw = id;
2444
2445 memcpy(&id_priv->cm_id.iw->local_addr, cma_src_addr(id_priv),
2446 rdma_addr_size(cma_src_addr(id_priv)));
2447
2448 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
2449
2450 if (ret) {
2451 iw_destroy_cm_id(id_priv->cm_id.iw);
2452 id_priv->cm_id.iw = NULL;
2453 }
2454
2455 return ret;
2456 }
2457
2458 static int cma_listen_handler(struct rdma_cm_id *id,
2459 struct rdma_cm_event *event)
2460 {
2461 struct rdma_id_private *id_priv = id->context;
2462
2463 id->context = id_priv->id.context;
2464 id->event_handler = id_priv->id.event_handler;
2465 return id_priv->id.event_handler(id, event);
2466 }
2467
2468 static void cma_listen_on_dev(struct rdma_id_private *id_priv,
2469 struct cma_device *cma_dev)
2470 {
2471 struct rdma_id_private *dev_id_priv;
2472 struct rdma_cm_id *id;
2473 struct net *net = id_priv->id.route.addr.dev_addr.net;
2474 int ret;
2475
2476 if (cma_family(id_priv) == AF_IB && !rdma_cap_ib_cm(cma_dev->device, 1))
2477 return;
2478
2479 id = __rdma_create_id(net, cma_listen_handler, id_priv, id_priv->id.ps,
2480 id_priv->id.qp_type, id_priv->res.kern_name);
2481 if (IS_ERR(id))
2482 return;
2483
2484 dev_id_priv = container_of(id, struct rdma_id_private, id);
2485
2486 dev_id_priv->state = RDMA_CM_ADDR_BOUND;
2487 memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv),
2488 rdma_addr_size(cma_src_addr(id_priv)));
2489
2490 _cma_attach_to_dev(dev_id_priv, cma_dev);
2491 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
2492 atomic_inc(&id_priv->refcount);
2493 dev_id_priv->internal_id = 1;
2494 dev_id_priv->afonly = id_priv->afonly;
2495 dev_id_priv->tos_set = id_priv->tos_set;
2496 dev_id_priv->tos = id_priv->tos;
2497
2498 ret = rdma_listen(id, id_priv->backlog);
2499 if (ret)
2500 dev_warn(&cma_dev->device->dev,
2501 "RDMA CMA: cma_listen_on_dev, error %d\n", ret);
2502 }
2503
2504 static void cma_listen_on_all(struct rdma_id_private *id_priv)
2505 {
2506 struct cma_device *cma_dev;
2507
2508 mutex_lock(&lock);
2509 list_add_tail(&id_priv->list, &listen_any_list);
2510 list_for_each_entry(cma_dev, &dev_list, list)
2511 cma_listen_on_dev(id_priv, cma_dev);
2512 mutex_unlock(&lock);
2513 }
2514
2515 void rdma_set_service_type(struct rdma_cm_id *id, int tos)
2516 {
2517 struct rdma_id_private *id_priv;
2518
2519 id_priv = container_of(id, struct rdma_id_private, id);
2520 id_priv->tos = (u8) tos;
2521 id_priv->tos_set = true;
2522 }
2523 EXPORT_SYMBOL(rdma_set_service_type);
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538 int rdma_set_ack_timeout(struct rdma_cm_id *id, u8 timeout)
2539 {
2540 struct rdma_id_private *id_priv;
2541
2542 if (id->qp_type != IB_QPT_RC)
2543 return -EINVAL;
2544
2545 id_priv = container_of(id, struct rdma_id_private, id);
2546 id_priv->timeout = timeout;
2547 id_priv->timeout_set = true;
2548
2549 return 0;
2550 }
2551 EXPORT_SYMBOL(rdma_set_ack_timeout);
2552
2553 static void cma_query_handler(int status, struct sa_path_rec *path_rec,
2554 void *context)
2555 {
2556 struct cma_work *work = context;
2557 struct rdma_route *route;
2558
2559 route = &work->id->id.route;
2560
2561 if (!status) {
2562 route->num_paths = 1;
2563 *route->path_rec = *path_rec;
2564 } else {
2565 work->old_state = RDMA_CM_ROUTE_QUERY;
2566 work->new_state = RDMA_CM_ADDR_RESOLVED;
2567 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
2568 work->event.status = status;
2569 pr_debug_ratelimited("RDMA CM: ROUTE_ERROR: failed to query path. status %d\n",
2570 status);
2571 }
2572
2573 queue_work(cma_wq, &work->work);
2574 }
2575
2576 static int cma_query_ib_route(struct rdma_id_private *id_priv,
2577 unsigned long timeout_ms, struct cma_work *work)
2578 {
2579 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2580 struct sa_path_rec path_rec;
2581 ib_sa_comp_mask comp_mask;
2582 struct sockaddr_in6 *sin6;
2583 struct sockaddr_ib *sib;
2584
2585 memset(&path_rec, 0, sizeof path_rec);
2586
2587 if (rdma_cap_opa_ah(id_priv->id.device, id_priv->id.port_num))
2588 path_rec.rec_type = SA_PATH_REC_TYPE_OPA;
2589 else
2590 path_rec.rec_type = SA_PATH_REC_TYPE_IB;
2591 rdma_addr_get_sgid(dev_addr, &path_rec.sgid);
2592 rdma_addr_get_dgid(dev_addr, &path_rec.dgid);
2593 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
2594 path_rec.numb_path = 1;
2595 path_rec.reversible = 1;
2596 path_rec.service_id = rdma_get_service_id(&id_priv->id,
2597 cma_dst_addr(id_priv));
2598
2599 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
2600 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
2601 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
2602
2603 switch (cma_family(id_priv)) {
2604 case AF_INET:
2605 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
2606 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
2607 break;
2608 case AF_INET6:
2609 sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
2610 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
2611 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2612 break;
2613 case AF_IB:
2614 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
2615 path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20);
2616 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2617 break;
2618 }
2619
2620 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
2621 id_priv->id.port_num, &path_rec,
2622 comp_mask, timeout_ms,
2623 GFP_KERNEL, cma_query_handler,
2624 work, &id_priv->query);
2625
2626 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
2627 }
2628
2629 static void cma_work_handler(struct work_struct *_work)
2630 {
2631 struct cma_work *work = container_of(_work, struct cma_work, work);
2632 struct rdma_id_private *id_priv = work->id;
2633 int destroy = 0;
2634
2635 mutex_lock(&id_priv->handler_mutex);
2636 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
2637 goto out;
2638
2639 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
2640 cma_exch(id_priv, RDMA_CM_DESTROYING);
2641 destroy = 1;
2642 }
2643 out:
2644 mutex_unlock(&id_priv->handler_mutex);
2645 cma_deref_id(id_priv);
2646 if (destroy)
2647 rdma_destroy_id(&id_priv->id);
2648 kfree(work);
2649 }
2650
2651 static void cma_ndev_work_handler(struct work_struct *_work)
2652 {
2653 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
2654 struct rdma_id_private *id_priv = work->id;
2655 int destroy = 0;
2656
2657 mutex_lock(&id_priv->handler_mutex);
2658 if (id_priv->state == RDMA_CM_DESTROYING ||
2659 id_priv->state == RDMA_CM_DEVICE_REMOVAL)
2660 goto out;
2661
2662 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
2663 cma_exch(id_priv, RDMA_CM_DESTROYING);
2664 destroy = 1;
2665 }
2666
2667 out:
2668 mutex_unlock(&id_priv->handler_mutex);
2669 cma_deref_id(id_priv);
2670 if (destroy)
2671 rdma_destroy_id(&id_priv->id);
2672 kfree(work);
2673 }
2674
2675 static void cma_init_resolve_route_work(struct cma_work *work,
2676 struct rdma_id_private *id_priv)
2677 {
2678 work->id = id_priv;
2679 INIT_WORK(&work->work, cma_work_handler);
2680 work->old_state = RDMA_CM_ROUTE_QUERY;
2681 work->new_state = RDMA_CM_ROUTE_RESOLVED;
2682 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2683 }
2684
2685 static void cma_init_resolve_addr_work(struct cma_work *work,
2686 struct rdma_id_private *id_priv)
2687 {
2688 work->id = id_priv;
2689 INIT_WORK(&work->work, cma_work_handler);
2690 work->old_state = RDMA_CM_ADDR_QUERY;
2691 work->new_state = RDMA_CM_ADDR_RESOLVED;
2692 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2693 }
2694
2695 static int cma_resolve_ib_route(struct rdma_id_private *id_priv,
2696 unsigned long timeout_ms)
2697 {
2698 struct rdma_route *route = &id_priv->id.route;
2699 struct cma_work *work;
2700 int ret;
2701
2702 work = kzalloc(sizeof *work, GFP_KERNEL);
2703 if (!work)
2704 return -ENOMEM;
2705
2706 cma_init_resolve_route_work(work, id_priv);
2707
2708 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
2709 if (!route->path_rec) {
2710 ret = -ENOMEM;
2711 goto err1;
2712 }
2713
2714 ret = cma_query_ib_route(id_priv, timeout_ms, work);
2715 if (ret)
2716 goto err2;
2717
2718 return 0;
2719 err2:
2720 kfree(route->path_rec);
2721 route->path_rec = NULL;
2722 err1:
2723 kfree(work);
2724 return ret;
2725 }
2726
2727 static enum ib_gid_type cma_route_gid_type(enum rdma_network_type network_type,
2728 unsigned long supported_gids,
2729 enum ib_gid_type default_gid)
2730 {
2731 if ((network_type == RDMA_NETWORK_IPV4 ||
2732 network_type == RDMA_NETWORK_IPV6) &&
2733 test_bit(IB_GID_TYPE_ROCE_UDP_ENCAP, &supported_gids))
2734 return IB_GID_TYPE_ROCE_UDP_ENCAP;
2735
2736 return default_gid;
2737 }
2738
2739
2740
2741
2742
2743
2744
2745
2746 static struct net_device *
2747 cma_iboe_set_path_rec_l2_fields(struct rdma_id_private *id_priv)
2748 {
2749 struct rdma_route *route = &id_priv->id.route;
2750 enum ib_gid_type gid_type = IB_GID_TYPE_ROCE;
2751 struct rdma_addr *addr = &route->addr;
2752 unsigned long supported_gids;
2753 struct net_device *ndev;
2754
2755 if (!addr->dev_addr.bound_dev_if)
2756 return NULL;
2757
2758 ndev = dev_get_by_index(addr->dev_addr.net,
2759 addr->dev_addr.bound_dev_if);
2760 if (!ndev)
2761 return NULL;
2762
2763 supported_gids = roce_gid_type_mask_support(id_priv->id.device,
2764 id_priv->id.port_num);
2765 gid_type = cma_route_gid_type(addr->dev_addr.network,
2766 supported_gids,
2767 id_priv->gid_type);
2768
2769 if (gid_type < ib_network_to_gid_type(addr->dev_addr.network))
2770 gid_type = ib_network_to_gid_type(addr->dev_addr.network);
2771 route->path_rec->rec_type = sa_conv_gid_to_pathrec_type(gid_type);
2772
2773 route->path_rec->roce.route_resolved = true;
2774 sa_path_set_dmac(route->path_rec, addr->dev_addr.dst_dev_addr);
2775 return ndev;
2776 }
2777
2778 int rdma_set_ib_path(struct rdma_cm_id *id,
2779 struct sa_path_rec *path_rec)
2780 {
2781 struct rdma_id_private *id_priv;
2782 struct net_device *ndev;
2783 int ret;
2784
2785 id_priv = container_of(id, struct rdma_id_private, id);
2786 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2787 RDMA_CM_ROUTE_RESOLVED))
2788 return -EINVAL;
2789
2790 id->route.path_rec = kmemdup(path_rec, sizeof(*path_rec),
2791 GFP_KERNEL);
2792 if (!id->route.path_rec) {
2793 ret = -ENOMEM;
2794 goto err;
2795 }
2796
2797 if (rdma_protocol_roce(id->device, id->port_num)) {
2798 ndev = cma_iboe_set_path_rec_l2_fields(id_priv);
2799 if (!ndev) {
2800 ret = -ENODEV;
2801 goto err_free;
2802 }
2803 dev_put(ndev);
2804 }
2805
2806 id->route.num_paths = 1;
2807 return 0;
2808
2809 err_free:
2810 kfree(id->route.path_rec);
2811 id->route.path_rec = NULL;
2812 err:
2813 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
2814 return ret;
2815 }
2816 EXPORT_SYMBOL(rdma_set_ib_path);
2817
2818 static int cma_resolve_iw_route(struct rdma_id_private *id_priv)
2819 {
2820 struct cma_work *work;
2821
2822 work = kzalloc(sizeof *work, GFP_KERNEL);
2823 if (!work)
2824 return -ENOMEM;
2825
2826 cma_init_resolve_route_work(work, id_priv);
2827 queue_work(cma_wq, &work->work);
2828 return 0;
2829 }
2830
2831 static int iboe_tos_to_sl(struct net_device *ndev, int tos)
2832 {
2833 int prio;
2834 struct net_device *dev;
2835
2836 prio = rt_tos2priority(tos);
2837 dev = is_vlan_dev(ndev) ? vlan_dev_real_dev(ndev) : ndev;
2838 if (dev->num_tc)
2839 return netdev_get_prio_tc_map(dev, prio);
2840
2841 #if IS_ENABLED(CONFIG_VLAN_8021Q)
2842 if (is_vlan_dev(ndev))
2843 return (vlan_dev_get_egress_qos_mask(ndev, prio) &
2844 VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
2845 #endif
2846 return 0;
2847 }
2848
2849 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
2850 {
2851 struct rdma_route *route = &id_priv->id.route;
2852 struct rdma_addr *addr = &route->addr;
2853 struct cma_work *work;
2854 int ret;
2855 struct net_device *ndev;
2856
2857 u8 default_roce_tos = id_priv->cma_dev->default_roce_tos[id_priv->id.port_num -
2858 rdma_start_port(id_priv->cma_dev->device)];
2859 u8 tos = id_priv->tos_set ? id_priv->tos : default_roce_tos;
2860
2861
2862 work = kzalloc(sizeof *work, GFP_KERNEL);
2863 if (!work)
2864 return -ENOMEM;
2865
2866 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
2867 if (!route->path_rec) {
2868 ret = -ENOMEM;
2869 goto err1;
2870 }
2871
2872 route->num_paths = 1;
2873
2874 ndev = cma_iboe_set_path_rec_l2_fields(id_priv);
2875 if (!ndev) {
2876 ret = -ENODEV;
2877 goto err2;
2878 }
2879
2880 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
2881 &route->path_rec->sgid);
2882 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.dst_addr,
2883 &route->path_rec->dgid);
2884
2885 if (((struct sockaddr *)&id_priv->id.route.addr.dst_addr)->sa_family != AF_IB)
2886
2887 route->path_rec->hop_limit = addr->dev_addr.hoplimit;
2888 else
2889 route->path_rec->hop_limit = 1;
2890 route->path_rec->reversible = 1;
2891 route->path_rec->pkey = cpu_to_be16(0xffff);
2892 route->path_rec->mtu_selector = IB_SA_EQ;
2893 route->path_rec->sl = iboe_tos_to_sl(ndev, tos);
2894 route->path_rec->traffic_class = tos;
2895 route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
2896 route->path_rec->rate_selector = IB_SA_EQ;
2897 route->path_rec->rate = iboe_get_rate(ndev);
2898 dev_put(ndev);
2899 route->path_rec->packet_life_time_selector = IB_SA_EQ;
2900 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
2901 if (!route->path_rec->mtu) {
2902 ret = -EINVAL;
2903 goto err2;
2904 }
2905
2906 cma_init_resolve_route_work(work, id_priv);
2907 queue_work(cma_wq, &work->work);
2908
2909 return 0;
2910
2911 err2:
2912 kfree(route->path_rec);
2913 route->path_rec = NULL;
2914 route->num_paths = 0;
2915 err1:
2916 kfree(work);
2917 return ret;
2918 }
2919
2920 int rdma_resolve_route(struct rdma_cm_id *id, unsigned long timeout_ms)
2921 {
2922 struct rdma_id_private *id_priv;
2923 int ret;
2924
2925 id_priv = container_of(id, struct rdma_id_private, id);
2926 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
2927 return -EINVAL;
2928
2929 atomic_inc(&id_priv->refcount);
2930 if (rdma_cap_ib_sa(id->device, id->port_num))
2931 ret = cma_resolve_ib_route(id_priv, timeout_ms);
2932 else if (rdma_protocol_roce(id->device, id->port_num))
2933 ret = cma_resolve_iboe_route(id_priv);
2934 else if (rdma_protocol_iwarp(id->device, id->port_num))
2935 ret = cma_resolve_iw_route(id_priv);
2936 else
2937 ret = -ENOSYS;
2938
2939 if (ret)
2940 goto err;
2941
2942 return 0;
2943 err:
2944 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
2945 cma_deref_id(id_priv);
2946 return ret;
2947 }
2948 EXPORT_SYMBOL(rdma_resolve_route);
2949
2950 static void cma_set_loopback(struct sockaddr *addr)
2951 {
2952 switch (addr->sa_family) {
2953 case AF_INET:
2954 ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
2955 break;
2956 case AF_INET6:
2957 ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr,
2958 0, 0, 0, htonl(1));
2959 break;
2960 default:
2961 ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr,
2962 0, 0, 0, htonl(1));
2963 break;
2964 }
2965 }
2966
2967 static int cma_bind_loopback(struct rdma_id_private *id_priv)
2968 {
2969 struct cma_device *cma_dev, *cur_dev;
2970 union ib_gid gid;
2971 enum ib_port_state port_state;
2972 u16 pkey;
2973 int ret;
2974 u8 p;
2975
2976 cma_dev = NULL;
2977 mutex_lock(&lock);
2978 list_for_each_entry(cur_dev, &dev_list, list) {
2979 if (cma_family(id_priv) == AF_IB &&
2980 !rdma_cap_ib_cm(cur_dev->device, 1))
2981 continue;
2982
2983 if (!cma_dev)
2984 cma_dev = cur_dev;
2985
2986 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
2987 if (!ib_get_cached_port_state(cur_dev->device, p, &port_state) &&
2988 port_state == IB_PORT_ACTIVE) {
2989 cma_dev = cur_dev;
2990 goto port_found;
2991 }
2992 }
2993 }
2994
2995 if (!cma_dev) {
2996 ret = -ENODEV;
2997 goto out;
2998 }
2999
3000 p = 1;
3001
3002 port_found:
3003 ret = rdma_query_gid(cma_dev->device, p, 0, &gid);
3004 if (ret)
3005 goto out;
3006
3007 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
3008 if (ret)
3009 goto out;
3010
3011 id_priv->id.route.addr.dev_addr.dev_type =
3012 (rdma_protocol_ib(cma_dev->device, p)) ?
3013 ARPHRD_INFINIBAND : ARPHRD_ETHER;
3014
3015 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
3016 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
3017 id_priv->id.port_num = p;
3018 cma_attach_to_dev(id_priv, cma_dev);
3019 cma_set_loopback(cma_src_addr(id_priv));
3020 out:
3021 mutex_unlock(&lock);
3022 return ret;
3023 }
3024
3025 static void addr_handler(int status, struct sockaddr *src_addr,
3026 struct rdma_dev_addr *dev_addr, void *context)
3027 {
3028 struct rdma_id_private *id_priv = context;
3029 struct rdma_cm_event event = {};
3030 struct sockaddr *addr;
3031 struct sockaddr_storage old_addr;
3032
3033 mutex_lock(&id_priv->handler_mutex);
3034 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
3035 RDMA_CM_ADDR_RESOLVED))
3036 goto out;
3037
3038
3039
3040
3041
3042
3043 addr = cma_src_addr(id_priv);
3044 memcpy(&old_addr, addr, rdma_addr_size(addr));
3045 memcpy(addr, src_addr, rdma_addr_size(src_addr));
3046 if (!status && !id_priv->cma_dev) {
3047 status = cma_acquire_dev_by_src_ip(id_priv);
3048 if (status)
3049 pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to acquire device. status %d\n",
3050 status);
3051 } else if (status) {
3052 pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to resolve IP. status %d\n", status);
3053 }
3054
3055 if (status) {
3056 memcpy(addr, &old_addr,
3057 rdma_addr_size((struct sockaddr *)&old_addr));
3058 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
3059 RDMA_CM_ADDR_BOUND))
3060 goto out;
3061 event.event = RDMA_CM_EVENT_ADDR_ERROR;
3062 event.status = status;
3063 } else
3064 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
3065
3066 if (id_priv->id.event_handler(&id_priv->id, &event)) {
3067 cma_exch(id_priv, RDMA_CM_DESTROYING);
3068 mutex_unlock(&id_priv->handler_mutex);
3069 rdma_destroy_id(&id_priv->id);
3070 return;
3071 }
3072 out:
3073 mutex_unlock(&id_priv->handler_mutex);
3074 }
3075
3076 static int cma_resolve_loopback(struct rdma_id_private *id_priv)
3077 {
3078 struct cma_work *work;
3079 union ib_gid gid;
3080 int ret;
3081
3082 work = kzalloc(sizeof *work, GFP_KERNEL);
3083 if (!work)
3084 return -ENOMEM;
3085
3086 if (!id_priv->cma_dev) {
3087 ret = cma_bind_loopback(id_priv);
3088 if (ret)
3089 goto err;
3090 }
3091
3092 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
3093 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
3094
3095 atomic_inc(&id_priv->refcount);
3096 cma_init_resolve_addr_work(work, id_priv);
3097 queue_work(cma_wq, &work->work);
3098 return 0;
3099 err:
3100 kfree(work);
3101 return ret;
3102 }
3103
3104 static int cma_resolve_ib_addr(struct rdma_id_private *id_priv)
3105 {
3106 struct cma_work *work;
3107 int ret;
3108
3109 work = kzalloc(sizeof *work, GFP_KERNEL);
3110 if (!work)
3111 return -ENOMEM;
3112
3113 if (!id_priv->cma_dev) {
3114 ret = cma_resolve_ib_dev(id_priv);
3115 if (ret)
3116 goto err;
3117 }
3118
3119 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *)
3120 &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr));
3121
3122 atomic_inc(&id_priv->refcount);
3123 cma_init_resolve_addr_work(work, id_priv);
3124 queue_work(cma_wq, &work->work);
3125 return 0;
3126 err:
3127 kfree(work);
3128 return ret;
3129 }
3130
3131 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
3132 const struct sockaddr *dst_addr)
3133 {
3134 if (!src_addr || !src_addr->sa_family) {
3135 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
3136 src_addr->sa_family = dst_addr->sa_family;
3137 if (IS_ENABLED(CONFIG_IPV6) &&
3138 dst_addr->sa_family == AF_INET6) {
3139 struct sockaddr_in6 *src_addr6 = (struct sockaddr_in6 *) src_addr;
3140 struct sockaddr_in6 *dst_addr6 = (struct sockaddr_in6 *) dst_addr;
3141 src_addr6->sin6_scope_id = dst_addr6->sin6_scope_id;
3142 if (ipv6_addr_type(&dst_addr6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
3143 id->route.addr.dev_addr.bound_dev_if = dst_addr6->sin6_scope_id;
3144 } else if (dst_addr->sa_family == AF_IB) {
3145 ((struct sockaddr_ib *) src_addr)->sib_pkey =
3146 ((struct sockaddr_ib *) dst_addr)->sib_pkey;
3147 }
3148 }
3149 return rdma_bind_addr(id, src_addr);
3150 }
3151
3152 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
3153 const struct sockaddr *dst_addr, unsigned long timeout_ms)
3154 {
3155 struct rdma_id_private *id_priv;
3156 int ret;
3157
3158 id_priv = container_of(id, struct rdma_id_private, id);
3159 memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr));
3160 if (id_priv->state == RDMA_CM_IDLE) {
3161 ret = cma_bind_addr(id, src_addr, dst_addr);
3162 if (ret) {
3163 memset(cma_dst_addr(id_priv), 0,
3164 rdma_addr_size(dst_addr));
3165 return ret;
3166 }
3167 }
3168
3169 if (cma_family(id_priv) != dst_addr->sa_family) {
3170 memset(cma_dst_addr(id_priv), 0, rdma_addr_size(dst_addr));
3171 return -EINVAL;
3172 }
3173
3174 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY)) {
3175 memset(cma_dst_addr(id_priv), 0, rdma_addr_size(dst_addr));
3176 return -EINVAL;
3177 }
3178
3179 if (cma_any_addr(dst_addr)) {
3180 ret = cma_resolve_loopback(id_priv);
3181 } else {
3182 if (dst_addr->sa_family == AF_IB) {
3183 ret = cma_resolve_ib_addr(id_priv);
3184 } else {
3185 ret = rdma_resolve_ip(cma_src_addr(id_priv), dst_addr,
3186 &id->route.addr.dev_addr,
3187 timeout_ms, addr_handler,
3188 false, id_priv);
3189 }
3190 }
3191 if (ret)
3192 goto err;
3193
3194 return 0;
3195 err:
3196 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
3197 return ret;
3198 }
3199 EXPORT_SYMBOL(rdma_resolve_addr);
3200
3201 int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
3202 {
3203 struct rdma_id_private *id_priv;
3204 unsigned long flags;
3205 int ret;
3206
3207 id_priv = container_of(id, struct rdma_id_private, id);
3208 spin_lock_irqsave(&id_priv->lock, flags);
3209 if (reuse || id_priv->state == RDMA_CM_IDLE) {
3210 id_priv->reuseaddr = reuse;
3211 ret = 0;
3212 } else {
3213 ret = -EINVAL;
3214 }
3215 spin_unlock_irqrestore(&id_priv->lock, flags);
3216 return ret;
3217 }
3218 EXPORT_SYMBOL(rdma_set_reuseaddr);
3219
3220 int rdma_set_afonly(struct rdma_cm_id *id, int afonly)
3221 {
3222 struct rdma_id_private *id_priv;
3223 unsigned long flags;
3224 int ret;
3225
3226 id_priv = container_of(id, struct rdma_id_private, id);
3227 spin_lock_irqsave(&id_priv->lock, flags);
3228 if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) {
3229 id_priv->options |= (1 << CMA_OPTION_AFONLY);
3230 id_priv->afonly = afonly;
3231 ret = 0;
3232 } else {
3233 ret = -EINVAL;
3234 }
3235 spin_unlock_irqrestore(&id_priv->lock, flags);
3236 return ret;
3237 }
3238 EXPORT_SYMBOL(rdma_set_afonly);
3239
3240 static void cma_bind_port(struct rdma_bind_list *bind_list,
3241 struct rdma_id_private *id_priv)
3242 {
3243 struct sockaddr *addr;
3244 struct sockaddr_ib *sib;
3245 u64 sid, mask;
3246 __be16 port;
3247
3248 addr = cma_src_addr(id_priv);
3249 port = htons(bind_list->port);
3250
3251 switch (addr->sa_family) {
3252 case AF_INET:
3253 ((struct sockaddr_in *) addr)->sin_port = port;
3254 break;
3255 case AF_INET6:
3256 ((struct sockaddr_in6 *) addr)->sin6_port = port;
3257 break;
3258 case AF_IB:
3259 sib = (struct sockaddr_ib *) addr;
3260 sid = be64_to_cpu(sib->sib_sid);
3261 mask = be64_to_cpu(sib->sib_sid_mask);
3262 sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port));
3263 sib->sib_sid_mask = cpu_to_be64(~0ULL);
3264 break;
3265 }
3266 id_priv->bind_list = bind_list;
3267 hlist_add_head(&id_priv->node, &bind_list->owners);
3268 }
3269
3270 static int cma_alloc_port(enum rdma_ucm_port_space ps,
3271 struct rdma_id_private *id_priv, unsigned short snum)
3272 {
3273 struct rdma_bind_list *bind_list;
3274 int ret;
3275
3276 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
3277 if (!bind_list)
3278 return -ENOMEM;
3279
3280 ret = cma_ps_alloc(id_priv->id.route.addr.dev_addr.net, ps, bind_list,
3281 snum);
3282 if (ret < 0)
3283 goto err;
3284
3285 bind_list->ps = ps;
3286 bind_list->port = snum;
3287 cma_bind_port(bind_list, id_priv);
3288 return 0;
3289 err:
3290 kfree(bind_list);
3291 return ret == -ENOSPC ? -EADDRNOTAVAIL : ret;
3292 }
3293
3294 static int cma_port_is_unique(struct rdma_bind_list *bind_list,
3295 struct rdma_id_private *id_priv)
3296 {
3297 struct rdma_id_private *cur_id;
3298 struct sockaddr *daddr = cma_dst_addr(id_priv);
3299 struct sockaddr *saddr = cma_src_addr(id_priv);
3300 __be16 dport = cma_port(daddr);
3301
3302 hlist_for_each_entry(cur_id, &bind_list->owners, node) {
3303 struct sockaddr *cur_daddr = cma_dst_addr(cur_id);
3304 struct sockaddr *cur_saddr = cma_src_addr(cur_id);
3305 __be16 cur_dport = cma_port(cur_daddr);
3306
3307 if (id_priv == cur_id)
3308 continue;
3309
3310
3311 if (!cma_any_port(daddr) &&
3312 !cma_any_port(cur_daddr) &&
3313 (dport != cur_dport))
3314 continue;
3315
3316
3317 if (!cma_any_addr(saddr) &&
3318 !cma_any_addr(cur_saddr) &&
3319 cma_addr_cmp(saddr, cur_saddr))
3320 continue;
3321
3322
3323 if (!cma_any_addr(daddr) &&
3324 !cma_any_addr(cur_daddr) &&
3325 cma_addr_cmp(daddr, cur_daddr))
3326 continue;
3327
3328 return -EADDRNOTAVAIL;
3329 }
3330 return 0;
3331 }
3332
3333 static int cma_alloc_any_port(enum rdma_ucm_port_space ps,
3334 struct rdma_id_private *id_priv)
3335 {
3336 static unsigned int last_used_port;
3337 int low, high, remaining;
3338 unsigned int rover;
3339 struct net *net = id_priv->id.route.addr.dev_addr.net;
3340
3341 inet_get_local_port_range(net, &low, &high);
3342 remaining = (high - low) + 1;
3343 rover = prandom_u32() % remaining + low;
3344 retry:
3345 if (last_used_port != rover) {
3346 struct rdma_bind_list *bind_list;
3347 int ret;
3348
3349 bind_list = cma_ps_find(net, ps, (unsigned short)rover);
3350
3351 if (!bind_list) {
3352 ret = cma_alloc_port(ps, id_priv, rover);
3353 } else {
3354 ret = cma_port_is_unique(bind_list, id_priv);
3355 if (!ret)
3356 cma_bind_port(bind_list, id_priv);
3357 }
3358
3359
3360
3361
3362 if (!ret)
3363 last_used_port = rover;
3364 if (ret != -EADDRNOTAVAIL)
3365 return ret;
3366 }
3367 if (--remaining) {
3368 rover++;
3369 if ((rover < low) || (rover > high))
3370 rover = low;
3371 goto retry;
3372 }
3373 return -EADDRNOTAVAIL;
3374 }
3375
3376
3377
3378
3379
3380
3381
3382 static int cma_check_port(struct rdma_bind_list *bind_list,
3383 struct rdma_id_private *id_priv, uint8_t reuseaddr)
3384 {
3385 struct rdma_id_private *cur_id;
3386 struct sockaddr *addr, *cur_addr;
3387
3388 addr = cma_src_addr(id_priv);
3389 hlist_for_each_entry(cur_id, &bind_list->owners, node) {
3390 if (id_priv == cur_id)
3391 continue;
3392
3393 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr &&
3394 cur_id->reuseaddr)
3395 continue;
3396
3397 cur_addr = cma_src_addr(cur_id);
3398 if (id_priv->afonly && cur_id->afonly &&
3399 (addr->sa_family != cur_addr->sa_family))
3400 continue;
3401
3402 if (cma_any_addr(addr) || cma_any_addr(cur_addr))
3403 return -EADDRNOTAVAIL;
3404
3405 if (!cma_addr_cmp(addr, cur_addr))
3406 return -EADDRINUSE;
3407 }
3408 return 0;
3409 }
3410
3411 static int cma_use_port(enum rdma_ucm_port_space ps,
3412 struct rdma_id_private *id_priv)
3413 {
3414 struct rdma_bind_list *bind_list;
3415 unsigned short snum;
3416 int ret;
3417
3418 snum = ntohs(cma_port(cma_src_addr(id_priv)));
3419 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
3420 return -EACCES;
3421
3422 bind_list = cma_ps_find(id_priv->id.route.addr.dev_addr.net, ps, snum);
3423 if (!bind_list) {
3424 ret = cma_alloc_port(ps, id_priv, snum);
3425 } else {
3426 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
3427 if (!ret)
3428 cma_bind_port(bind_list, id_priv);
3429 }
3430 return ret;
3431 }
3432
3433 static int cma_bind_listen(struct rdma_id_private *id_priv)
3434 {
3435 struct rdma_bind_list *bind_list = id_priv->bind_list;
3436 int ret = 0;
3437
3438 mutex_lock(&lock);
3439 if (bind_list->owners.first->next)
3440 ret = cma_check_port(bind_list, id_priv, 0);
3441 mutex_unlock(&lock);
3442 return ret;
3443 }
3444
3445 static enum rdma_ucm_port_space
3446 cma_select_inet_ps(struct rdma_id_private *id_priv)
3447 {
3448 switch (id_priv->id.ps) {
3449 case RDMA_PS_TCP:
3450 case RDMA_PS_UDP:
3451 case RDMA_PS_IPOIB:
3452 case RDMA_PS_IB:
3453 return id_priv->id.ps;
3454 default:
3455
3456 return 0;
3457 }
3458 }
3459
3460 static enum rdma_ucm_port_space
3461 cma_select_ib_ps(struct rdma_id_private *id_priv)
3462 {
3463 enum rdma_ucm_port_space ps = 0;
3464 struct sockaddr_ib *sib;
3465 u64 sid_ps, mask, sid;
3466
3467 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
3468 mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK;
3469 sid = be64_to_cpu(sib->sib_sid) & mask;
3470
3471 if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) {
3472 sid_ps = RDMA_IB_IP_PS_IB;
3473 ps = RDMA_PS_IB;
3474 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) &&
3475 (sid == (RDMA_IB_IP_PS_TCP & mask))) {
3476 sid_ps = RDMA_IB_IP_PS_TCP;
3477 ps = RDMA_PS_TCP;
3478 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) &&
3479 (sid == (RDMA_IB_IP_PS_UDP & mask))) {
3480 sid_ps = RDMA_IB_IP_PS_UDP;
3481 ps = RDMA_PS_UDP;
3482 }
3483
3484 if (ps) {
3485 sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib)));
3486 sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK |
3487 be64_to_cpu(sib->sib_sid_mask));
3488 }
3489 return ps;
3490 }
3491
3492 static int cma_get_port(struct rdma_id_private *id_priv)
3493 {
3494 enum rdma_ucm_port_space ps;
3495 int ret;
3496
3497 if (cma_family(id_priv) != AF_IB)
3498 ps = cma_select_inet_ps(id_priv);
3499 else
3500 ps = cma_select_ib_ps(id_priv);
3501 if (!ps)
3502 return -EPROTONOSUPPORT;
3503
3504 mutex_lock(&lock);
3505 if (cma_any_port(cma_src_addr(id_priv)))
3506 ret = cma_alloc_any_port(ps, id_priv);
3507 else
3508 ret = cma_use_port(ps, id_priv);
3509 mutex_unlock(&lock);
3510
3511 return ret;
3512 }
3513
3514 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
3515 struct sockaddr *addr)
3516 {
3517 #if IS_ENABLED(CONFIG_IPV6)
3518 struct sockaddr_in6 *sin6;
3519
3520 if (addr->sa_family != AF_INET6)
3521 return 0;
3522
3523 sin6 = (struct sockaddr_in6 *) addr;
3524
3525 if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL))
3526 return 0;
3527
3528 if (!sin6->sin6_scope_id)
3529 return -EINVAL;
3530
3531 dev_addr->bound_dev_if = sin6->sin6_scope_id;
3532 #endif
3533 return 0;
3534 }
3535
3536 int rdma_listen(struct rdma_cm_id *id, int backlog)
3537 {
3538 struct rdma_id_private *id_priv;
3539 int ret;
3540
3541 id_priv = container_of(id, struct rdma_id_private, id);
3542 if (id_priv->state == RDMA_CM_IDLE) {
3543 id->route.addr.src_addr.ss_family = AF_INET;
3544 ret = rdma_bind_addr(id, cma_src_addr(id_priv));
3545 if (ret)
3546 return ret;
3547 }
3548
3549 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
3550 return -EINVAL;
3551
3552 if (id_priv->reuseaddr) {
3553 ret = cma_bind_listen(id_priv);
3554 if (ret)
3555 goto err;
3556 }
3557
3558 id_priv->backlog = backlog;
3559 if (id->device) {
3560 if (rdma_cap_ib_cm(id->device, 1)) {
3561 ret = cma_ib_listen(id_priv);
3562 if (ret)
3563 goto err;
3564 } else if (rdma_cap_iw_cm(id->device, 1)) {
3565 ret = cma_iw_listen(id_priv, backlog);
3566 if (ret)
3567 goto err;
3568 } else {
3569 ret = -ENOSYS;
3570 goto err;
3571 }
3572 } else
3573 cma_listen_on_all(id_priv);
3574
3575 return 0;
3576 err:
3577 id_priv->backlog = 0;
3578 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
3579 return ret;
3580 }
3581 EXPORT_SYMBOL(rdma_listen);
3582
3583 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
3584 {
3585 struct rdma_id_private *id_priv;
3586 int ret;
3587 struct sockaddr *daddr;
3588
3589 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 &&
3590 addr->sa_family != AF_IB)
3591 return -EAFNOSUPPORT;
3592
3593 id_priv = container_of(id, struct rdma_id_private, id);
3594 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
3595 return -EINVAL;
3596
3597 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
3598 if (ret)
3599 goto err1;
3600
3601 memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr));
3602 if (!cma_any_addr(addr)) {
3603 ret = cma_translate_addr(addr, &id->route.addr.dev_addr);
3604 if (ret)
3605 goto err1;
3606
3607 ret = cma_acquire_dev_by_src_ip(id_priv);
3608 if (ret)
3609 goto err1;
3610 }
3611
3612 if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) {
3613 if (addr->sa_family == AF_INET)
3614 id_priv->afonly = 1;
3615 #if IS_ENABLED(CONFIG_IPV6)
3616 else if (addr->sa_family == AF_INET6) {
3617 struct net *net = id_priv->id.route.addr.dev_addr.net;
3618
3619 id_priv->afonly = net->ipv6.sysctl.bindv6only;
3620 }
3621 #endif
3622 }
3623 daddr = cma_dst_addr(id_priv);
3624 daddr->sa_family = addr->sa_family;
3625
3626 ret = cma_get_port(id_priv);
3627 if (ret)
3628 goto err2;
3629
3630 return 0;
3631 err2:
3632 rdma_restrack_del(&id_priv->res);
3633 if (id_priv->cma_dev)
3634 cma_release_dev(id_priv);
3635 err1:
3636 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
3637 return ret;
3638 }
3639 EXPORT_SYMBOL(rdma_bind_addr);
3640
3641 static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv)
3642 {
3643 struct cma_hdr *cma_hdr;
3644
3645 cma_hdr = hdr;
3646 cma_hdr->cma_version = CMA_VERSION;
3647 if (cma_family(id_priv) == AF_INET) {
3648 struct sockaddr_in *src4, *dst4;
3649
3650 src4 = (struct sockaddr_in *) cma_src_addr(id_priv);
3651 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv);
3652
3653 cma_set_ip_ver(cma_hdr, 4);
3654 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
3655 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
3656 cma_hdr->port = src4->sin_port;
3657 } else if (cma_family(id_priv) == AF_INET6) {
3658 struct sockaddr_in6 *src6, *dst6;
3659
3660 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
3661 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv);
3662
3663 cma_set_ip_ver(cma_hdr, 6);
3664 cma_hdr->src_addr.ip6 = src6->sin6_addr;
3665 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
3666 cma_hdr->port = src6->sin6_port;
3667 }
3668 return 0;
3669 }
3670
3671 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
3672 const struct ib_cm_event *ib_event)
3673 {
3674 struct rdma_id_private *id_priv = cm_id->context;
3675 struct rdma_cm_event event = {};
3676 const struct ib_cm_sidr_rep_event_param *rep =
3677 &ib_event->param.sidr_rep_rcvd;
3678 int ret = 0;
3679
3680 mutex_lock(&id_priv->handler_mutex);
3681 if (id_priv->state != RDMA_CM_CONNECT)
3682 goto out;
3683
3684 switch (ib_event->event) {
3685 case IB_CM_SIDR_REQ_ERROR:
3686 event.event = RDMA_CM_EVENT_UNREACHABLE;
3687 event.status = -ETIMEDOUT;
3688 break;
3689 case IB_CM_SIDR_REP_RECEIVED:
3690 event.param.ud.private_data = ib_event->private_data;
3691 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
3692 if (rep->status != IB_SIDR_SUCCESS) {
3693 event.event = RDMA_CM_EVENT_UNREACHABLE;
3694 event.status = ib_event->param.sidr_rep_rcvd.status;
3695 pr_debug_ratelimited("RDMA CM: UNREACHABLE: bad SIDR reply. status %d\n",
3696 event.status);
3697 break;
3698 }
3699 ret = cma_set_qkey(id_priv, rep->qkey);
3700 if (ret) {
3701 pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to set qkey. status %d\n", ret);
3702 event.event = RDMA_CM_EVENT_ADDR_ERROR;
3703 event.status = ret;
3704 break;
3705 }
3706 ib_init_ah_attr_from_path(id_priv->id.device,
3707 id_priv->id.port_num,
3708 id_priv->id.route.path_rec,
3709 &event.param.ud.ah_attr,
3710 rep->sgid_attr);
3711 event.param.ud.qp_num = rep->qpn;
3712 event.param.ud.qkey = rep->qkey;
3713 event.event = RDMA_CM_EVENT_ESTABLISHED;
3714 event.status = 0;
3715 break;
3716 default:
3717 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
3718 ib_event->event);
3719 goto out;
3720 }
3721
3722 ret = id_priv->id.event_handler(&id_priv->id, &event);
3723
3724 rdma_destroy_ah_attr(&event.param.ud.ah_attr);
3725 if (ret) {
3726
3727 id_priv->cm_id.ib = NULL;
3728 cma_exch(id_priv, RDMA_CM_DESTROYING);
3729 mutex_unlock(&id_priv->handler_mutex);
3730 rdma_destroy_id(&id_priv->id);
3731 return ret;
3732 }
3733 out:
3734 mutex_unlock(&id_priv->handler_mutex);
3735 return ret;
3736 }
3737
3738 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
3739 struct rdma_conn_param *conn_param)
3740 {
3741 struct ib_cm_sidr_req_param req;
3742 struct ib_cm_id *id;
3743 void *private_data;
3744 u8 offset;
3745 int ret;
3746
3747 memset(&req, 0, sizeof req);
3748 offset = cma_user_data_offset(id_priv);
3749 req.private_data_len = offset + conn_param->private_data_len;
3750 if (req.private_data_len < conn_param->private_data_len)
3751 return -EINVAL;
3752
3753 if (req.private_data_len) {
3754 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3755 if (!private_data)
3756 return -ENOMEM;
3757 } else {
3758 private_data = NULL;
3759 }
3760
3761 if (conn_param->private_data && conn_param->private_data_len)
3762 memcpy(private_data + offset, conn_param->private_data,
3763 conn_param->private_data_len);
3764
3765 if (private_data) {
3766 ret = cma_format_hdr(private_data, id_priv);
3767 if (ret)
3768 goto out;
3769 req.private_data = private_data;
3770 }
3771
3772 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
3773 id_priv);
3774 if (IS_ERR(id)) {
3775 ret = PTR_ERR(id);
3776 goto out;
3777 }
3778 id_priv->cm_id.ib = id;
3779
3780 req.path = id_priv->id.route.path_rec;
3781 req.sgid_attr = id_priv->id.route.addr.dev_addr.sgid_attr;
3782 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
3783 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
3784 req.max_cm_retries = CMA_MAX_CM_RETRIES;
3785
3786 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
3787 if (ret) {
3788 ib_destroy_cm_id(id_priv->cm_id.ib);
3789 id_priv->cm_id.ib = NULL;
3790 }
3791 out:
3792 kfree(private_data);
3793 return ret;
3794 }
3795
3796 static int cma_connect_ib(struct rdma_id_private *id_priv,
3797 struct rdma_conn_param *conn_param)
3798 {
3799 struct ib_cm_req_param req;
3800 struct rdma_route *route;
3801 void *private_data;
3802 struct ib_cm_id *id;
3803 u8 offset;
3804 int ret;
3805
3806 memset(&req, 0, sizeof req);
3807 offset = cma_user_data_offset(id_priv);
3808 req.private_data_len = offset + conn_param->private_data_len;
3809 if (req.private_data_len < conn_param->private_data_len)
3810 return -EINVAL;
3811
3812 if (req.private_data_len) {
3813 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3814 if (!private_data)
3815 return -ENOMEM;
3816 } else {
3817 private_data = NULL;
3818 }
3819
3820 if (conn_param->private_data && conn_param->private_data_len)
3821 memcpy(private_data + offset, conn_param->private_data,
3822 conn_param->private_data_len);
3823
3824 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
3825 if (IS_ERR(id)) {
3826 ret = PTR_ERR(id);
3827 goto out;
3828 }
3829 id_priv->cm_id.ib = id;
3830
3831 route = &id_priv->id.route;
3832 if (private_data) {
3833 ret = cma_format_hdr(private_data, id_priv);
3834 if (ret)
3835 goto out;
3836 req.private_data = private_data;
3837 }
3838
3839 req.primary_path = &route->path_rec[0];
3840 if (route->num_paths == 2)
3841 req.alternate_path = &route->path_rec[1];
3842
3843 req.ppath_sgid_attr = id_priv->id.route.addr.dev_addr.sgid_attr;
3844
3845 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
3846 req.qp_num = id_priv->qp_num;
3847 req.qp_type = id_priv->id.qp_type;
3848 req.starting_psn = id_priv->seq_num;
3849 req.responder_resources = conn_param->responder_resources;
3850 req.initiator_depth = conn_param->initiator_depth;
3851 req.flow_control = conn_param->flow_control;
3852 req.retry_count = min_t(u8, 7, conn_param->retry_count);
3853 req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
3854 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3855 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3856 req.max_cm_retries = CMA_MAX_CM_RETRIES;
3857 req.srq = id_priv->srq ? 1 : 0;
3858
3859 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
3860 out:
3861 if (ret && !IS_ERR(id)) {
3862 ib_destroy_cm_id(id);
3863 id_priv->cm_id.ib = NULL;
3864 }
3865
3866 kfree(private_data);
3867 return ret;
3868 }
3869
3870 static int cma_connect_iw(struct rdma_id_private *id_priv,
3871 struct rdma_conn_param *conn_param)
3872 {
3873 struct iw_cm_id *cm_id;
3874 int ret;
3875 struct iw_cm_conn_param iw_param;
3876
3877 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
3878 if (IS_ERR(cm_id))
3879 return PTR_ERR(cm_id);
3880
3881 cm_id->tos = id_priv->tos;
3882 cm_id->tos_set = id_priv->tos_set;
3883 id_priv->cm_id.iw = cm_id;
3884
3885 memcpy(&cm_id->local_addr, cma_src_addr(id_priv),
3886 rdma_addr_size(cma_src_addr(id_priv)));
3887 memcpy(&cm_id->remote_addr, cma_dst_addr(id_priv),
3888 rdma_addr_size(cma_dst_addr(id_priv)));
3889
3890 ret = cma_modify_qp_rtr(id_priv, conn_param);
3891 if (ret)
3892 goto out;
3893
3894 if (conn_param) {
3895 iw_param.ord = conn_param->initiator_depth;
3896 iw_param.ird = conn_param->responder_resources;
3897 iw_param.private_data = conn_param->private_data;
3898 iw_param.private_data_len = conn_param->private_data_len;
3899 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
3900 } else {
3901 memset(&iw_param, 0, sizeof iw_param);
3902 iw_param.qpn = id_priv->qp_num;
3903 }
3904 ret = iw_cm_connect(cm_id, &iw_param);
3905 out:
3906 if (ret) {
3907 iw_destroy_cm_id(cm_id);
3908 id_priv->cm_id.iw = NULL;
3909 }
3910 return ret;
3911 }
3912
3913 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
3914 {
3915 struct rdma_id_private *id_priv;
3916 int ret;
3917
3918 id_priv = container_of(id, struct rdma_id_private, id);
3919 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
3920 return -EINVAL;
3921
3922 if (!id->qp) {
3923 id_priv->qp_num = conn_param->qp_num;
3924 id_priv->srq = conn_param->srq;
3925 }
3926
3927 if (rdma_cap_ib_cm(id->device, id->port_num)) {
3928 if (id->qp_type == IB_QPT_UD)
3929 ret = cma_resolve_ib_udp(id_priv, conn_param);
3930 else
3931 ret = cma_connect_ib(id_priv, conn_param);
3932 } else if (rdma_cap_iw_cm(id->device, id->port_num))
3933 ret = cma_connect_iw(id_priv, conn_param);
3934 else
3935 ret = -ENOSYS;
3936 if (ret)
3937 goto err;
3938
3939 return 0;
3940 err:
3941 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
3942 return ret;
3943 }
3944 EXPORT_SYMBOL(rdma_connect);
3945
3946 static int cma_accept_ib(struct rdma_id_private *id_priv,
3947 struct rdma_conn_param *conn_param)
3948 {
3949 struct ib_cm_rep_param rep;
3950 int ret;
3951
3952 ret = cma_modify_qp_rtr(id_priv, conn_param);
3953 if (ret)
3954 goto out;
3955
3956 ret = cma_modify_qp_rts(id_priv, conn_param);
3957 if (ret)
3958 goto out;
3959
3960 memset(&rep, 0, sizeof rep);
3961 rep.qp_num = id_priv->qp_num;
3962 rep.starting_psn = id_priv->seq_num;
3963 rep.private_data = conn_param->private_data;
3964 rep.private_data_len = conn_param->private_data_len;
3965 rep.responder_resources = conn_param->responder_resources;
3966 rep.initiator_depth = conn_param->initiator_depth;
3967 rep.failover_accepted = 0;
3968 rep.flow_control = conn_param->flow_control;
3969 rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
3970 rep.srq = id_priv->srq ? 1 : 0;
3971
3972 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
3973 out:
3974 return ret;
3975 }
3976
3977 static int cma_accept_iw(struct rdma_id_private *id_priv,
3978 struct rdma_conn_param *conn_param)
3979 {
3980 struct iw_cm_conn_param iw_param;
3981 int ret;
3982
3983 if (!conn_param)
3984 return -EINVAL;
3985
3986 ret = cma_modify_qp_rtr(id_priv, conn_param);
3987 if (ret)
3988 return ret;
3989
3990 iw_param.ord = conn_param->initiator_depth;
3991 iw_param.ird = conn_param->responder_resources;
3992 iw_param.private_data = conn_param->private_data;
3993 iw_param.private_data_len = conn_param->private_data_len;
3994 if (id_priv->id.qp) {
3995 iw_param.qpn = id_priv->qp_num;
3996 } else
3997 iw_param.qpn = conn_param->qp_num;
3998
3999 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
4000 }
4001
4002 static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
4003 enum ib_cm_sidr_status status, u32 qkey,
4004 const void *private_data, int private_data_len)
4005 {
4006 struct ib_cm_sidr_rep_param rep;
4007 int ret;
4008
4009 memset(&rep, 0, sizeof rep);
4010 rep.status = status;
4011 if (status == IB_SIDR_SUCCESS) {
4012 ret = cma_set_qkey(id_priv, qkey);
4013 if (ret)
4014 return ret;
4015 rep.qp_num = id_priv->qp_num;
4016 rep.qkey = id_priv->qkey;
4017 }
4018 rep.private_data = private_data;
4019 rep.private_data_len = private_data_len;
4020
4021 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
4022 }
4023
4024 int __rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param,
4025 const char *caller)
4026 {
4027 struct rdma_id_private *id_priv;
4028 int ret;
4029
4030 id_priv = container_of(id, struct rdma_id_private, id);
4031
4032 rdma_restrack_set_task(&id_priv->res, caller);
4033
4034 if (!cma_comp(id_priv, RDMA_CM_CONNECT))
4035 return -EINVAL;
4036
4037 if (!id->qp && conn_param) {
4038 id_priv->qp_num = conn_param->qp_num;
4039 id_priv->srq = conn_param->srq;
4040 }
4041
4042 if (rdma_cap_ib_cm(id->device, id->port_num)) {
4043 if (id->qp_type == IB_QPT_UD) {
4044 if (conn_param)
4045 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
4046 conn_param->qkey,
4047 conn_param->private_data,
4048 conn_param->private_data_len);
4049 else
4050 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
4051 0, NULL, 0);
4052 } else {
4053 if (conn_param)
4054 ret = cma_accept_ib(id_priv, conn_param);
4055 else
4056 ret = cma_rep_recv(id_priv);
4057 }
4058 } else if (rdma_cap_iw_cm(id->device, id->port_num))
4059 ret = cma_accept_iw(id_priv, conn_param);
4060 else
4061 ret = -ENOSYS;
4062
4063 if (ret)
4064 goto reject;
4065
4066 return 0;
4067 reject:
4068 cma_modify_qp_err(id_priv);
4069 rdma_reject(id, NULL, 0);
4070 return ret;
4071 }
4072 EXPORT_SYMBOL(__rdma_accept);
4073
4074 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
4075 {
4076 struct rdma_id_private *id_priv;
4077 int ret;
4078
4079 id_priv = container_of(id, struct rdma_id_private, id);
4080 if (!id_priv->cm_id.ib)
4081 return -EINVAL;
4082
4083 switch (id->device->node_type) {
4084 case RDMA_NODE_IB_CA:
4085 ret = ib_cm_notify(id_priv->cm_id.ib, event);
4086 break;
4087 default:
4088 ret = 0;
4089 break;
4090 }
4091 return ret;
4092 }
4093 EXPORT_SYMBOL(rdma_notify);
4094
4095 int rdma_reject(struct rdma_cm_id *id, const void *private_data,
4096 u8 private_data_len)
4097 {
4098 struct rdma_id_private *id_priv;
4099 int ret;
4100
4101 id_priv = container_of(id, struct rdma_id_private, id);
4102 if (!id_priv->cm_id.ib)
4103 return -EINVAL;
4104
4105 if (rdma_cap_ib_cm(id->device, id->port_num)) {
4106 if (id->qp_type == IB_QPT_UD)
4107 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0,
4108 private_data, private_data_len);
4109 else
4110 ret = ib_send_cm_rej(id_priv->cm_id.ib,
4111 IB_CM_REJ_CONSUMER_DEFINED, NULL,
4112 0, private_data, private_data_len);
4113 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
4114 ret = iw_cm_reject(id_priv->cm_id.iw,
4115 private_data, private_data_len);
4116 } else
4117 ret = -ENOSYS;
4118
4119 return ret;
4120 }
4121 EXPORT_SYMBOL(rdma_reject);
4122
4123 int rdma_disconnect(struct rdma_cm_id *id)
4124 {
4125 struct rdma_id_private *id_priv;
4126 int ret;
4127
4128 id_priv = container_of(id, struct rdma_id_private, id);
4129 if (!id_priv->cm_id.ib)
4130 return -EINVAL;
4131
4132 if (rdma_cap_ib_cm(id->device, id->port_num)) {
4133 ret = cma_modify_qp_err(id_priv);
4134 if (ret)
4135 goto out;
4136
4137 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
4138 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
4139 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
4140 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
4141 } else
4142 ret = -EINVAL;
4143
4144 out:
4145 return ret;
4146 }
4147 EXPORT_SYMBOL(rdma_disconnect);
4148
4149 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
4150 {
4151 struct rdma_id_private *id_priv;
4152 struct cma_multicast *mc = multicast->context;
4153 struct rdma_cm_event event = {};
4154 int ret = 0;
4155
4156 id_priv = mc->id_priv;
4157 mutex_lock(&id_priv->handler_mutex);
4158 if (id_priv->state != RDMA_CM_ADDR_BOUND &&
4159 id_priv->state != RDMA_CM_ADDR_RESOLVED)
4160 goto out;
4161
4162 if (!status)
4163 status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey));
4164 else
4165 pr_debug_ratelimited("RDMA CM: MULTICAST_ERROR: failed to join multicast. status %d\n",
4166 status);
4167 mutex_lock(&id_priv->qp_mutex);
4168 if (!status && id_priv->id.qp) {
4169 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
4170 be16_to_cpu(multicast->rec.mlid));
4171 if (status)
4172 pr_debug_ratelimited("RDMA CM: MULTICAST_ERROR: failed to attach QP. status %d\n",
4173 status);
4174 }
4175 mutex_unlock(&id_priv->qp_mutex);
4176
4177 event.status = status;
4178 event.param.ud.private_data = mc->context;
4179 if (!status) {
4180 struct rdma_dev_addr *dev_addr =
4181 &id_priv->id.route.addr.dev_addr;
4182 struct net_device *ndev =
4183 dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
4184 enum ib_gid_type gid_type =
4185 id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
4186 rdma_start_port(id_priv->cma_dev->device)];
4187
4188 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
4189 ret = ib_init_ah_from_mcmember(id_priv->id.device,
4190 id_priv->id.port_num,
4191 &multicast->rec,
4192 ndev, gid_type,
4193 &event.param.ud.ah_attr);
4194 if (ret)
4195 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
4196
4197 event.param.ud.qp_num = 0xFFFFFF;
4198 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
4199 if (ndev)
4200 dev_put(ndev);
4201 } else
4202 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
4203
4204 ret = id_priv->id.event_handler(&id_priv->id, &event);
4205
4206 rdma_destroy_ah_attr(&event.param.ud.ah_attr);
4207 if (ret) {
4208 cma_exch(id_priv, RDMA_CM_DESTROYING);
4209 mutex_unlock(&id_priv->handler_mutex);
4210 rdma_destroy_id(&id_priv->id);
4211 return 0;
4212 }
4213
4214 out:
4215 mutex_unlock(&id_priv->handler_mutex);
4216 return 0;
4217 }
4218
4219 static void cma_set_mgid(struct rdma_id_private *id_priv,
4220 struct sockaddr *addr, union ib_gid *mgid)
4221 {
4222 unsigned char mc_map[MAX_ADDR_LEN];
4223 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
4224 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
4225 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
4226
4227 if (cma_any_addr(addr)) {
4228 memset(mgid, 0, sizeof *mgid);
4229 } else if ((addr->sa_family == AF_INET6) &&
4230 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
4231 0xFF10A01B)) {
4232
4233 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
4234 } else if (addr->sa_family == AF_IB) {
4235 memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid);
4236 } else if (addr->sa_family == AF_INET6) {
4237 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
4238 if (id_priv->id.ps == RDMA_PS_UDP)
4239 mc_map[7] = 0x01;
4240 *mgid = *(union ib_gid *) (mc_map + 4);
4241 } else {
4242 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
4243 if (id_priv->id.ps == RDMA_PS_UDP)
4244 mc_map[7] = 0x01;
4245 *mgid = *(union ib_gid *) (mc_map + 4);
4246 }
4247 }
4248
4249 static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
4250 struct cma_multicast *mc)
4251 {
4252 struct ib_sa_mcmember_rec rec;
4253 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
4254 ib_sa_comp_mask comp_mask;
4255 int ret;
4256
4257 ib_addr_get_mgid(dev_addr, &rec.mgid);
4258 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
4259 &rec.mgid, &rec);
4260 if (ret)
4261 return ret;
4262
4263 ret = cma_set_qkey(id_priv, 0);
4264 if (ret)
4265 return ret;
4266
4267 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
4268 rec.qkey = cpu_to_be32(id_priv->qkey);
4269 rdma_addr_get_sgid(dev_addr, &rec.port_gid);
4270 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
4271 rec.join_state = mc->join_state;
4272
4273 if ((rec.join_state == BIT(SENDONLY_FULLMEMBER_JOIN)) &&
4274 (!ib_sa_sendonly_fullmem_support(&sa_client,
4275 id_priv->id.device,
4276 id_priv->id.port_num))) {
4277 dev_warn(
4278 &id_priv->id.device->dev,
4279 "RDMA CM: port %u Unable to multicast join: SM doesn't support Send Only Full Member option\n",
4280 id_priv->id.port_num);
4281 return -EOPNOTSUPP;
4282 }
4283
4284 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
4285 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
4286 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
4287 IB_SA_MCMEMBER_REC_FLOW_LABEL |
4288 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
4289
4290 if (id_priv->id.ps == RDMA_PS_IPOIB)
4291 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
4292 IB_SA_MCMEMBER_REC_RATE_SELECTOR |
4293 IB_SA_MCMEMBER_REC_MTU_SELECTOR |
4294 IB_SA_MCMEMBER_REC_MTU |
4295 IB_SA_MCMEMBER_REC_HOP_LIMIT;
4296
4297 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
4298 id_priv->id.port_num, &rec,
4299 comp_mask, GFP_KERNEL,
4300 cma_ib_mc_handler, mc);
4301 return PTR_ERR_OR_ZERO(mc->multicast.ib);
4302 }
4303
4304 static void iboe_mcast_work_handler(struct work_struct *work)
4305 {
4306 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
4307 struct cma_multicast *mc = mw->mc;
4308 struct ib_sa_multicast *m = mc->multicast.ib;
4309
4310 mc->multicast.ib->context = mc;
4311 cma_ib_mc_handler(0, m);
4312 kref_put(&mc->mcref, release_mc);
4313 kfree(mw);
4314 }
4315
4316 static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid,
4317 enum ib_gid_type gid_type)
4318 {
4319 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
4320 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
4321
4322 if (cma_any_addr(addr)) {
4323 memset(mgid, 0, sizeof *mgid);
4324 } else if (addr->sa_family == AF_INET6) {
4325 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
4326 } else {
4327 mgid->raw[0] =
4328 (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) ? 0 : 0xff;
4329 mgid->raw[1] =
4330 (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) ? 0 : 0x0e;
4331 mgid->raw[2] = 0;
4332 mgid->raw[3] = 0;
4333 mgid->raw[4] = 0;
4334 mgid->raw[5] = 0;
4335 mgid->raw[6] = 0;
4336 mgid->raw[7] = 0;
4337 mgid->raw[8] = 0;
4338 mgid->raw[9] = 0;
4339 mgid->raw[10] = 0xff;
4340 mgid->raw[11] = 0xff;
4341 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
4342 }
4343 }
4344
4345 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
4346 struct cma_multicast *mc)
4347 {
4348 struct iboe_mcast_work *work;
4349 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
4350 int err = 0;
4351 struct sockaddr *addr = (struct sockaddr *)&mc->addr;
4352 struct net_device *ndev = NULL;
4353 enum ib_gid_type gid_type;
4354 bool send_only;
4355
4356 send_only = mc->join_state == BIT(SENDONLY_FULLMEMBER_JOIN);
4357
4358 if (cma_zero_addr((struct sockaddr *)&mc->addr))
4359 return -EINVAL;
4360
4361 work = kzalloc(sizeof *work, GFP_KERNEL);
4362 if (!work)
4363 return -ENOMEM;
4364
4365 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
4366 if (!mc->multicast.ib) {
4367 err = -ENOMEM;
4368 goto out1;
4369 }
4370
4371 gid_type = id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
4372 rdma_start_port(id_priv->cma_dev->device)];
4373 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid, gid_type);
4374
4375 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
4376 if (id_priv->id.ps == RDMA_PS_UDP)
4377 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
4378
4379 if (dev_addr->bound_dev_if)
4380 ndev = dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
4381 if (!ndev) {
4382 err = -ENODEV;
4383 goto out2;
4384 }
4385 mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
4386 mc->multicast.ib->rec.hop_limit = 1;
4387 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
4388
4389 if (addr->sa_family == AF_INET) {
4390 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) {
4391 mc->multicast.ib->rec.hop_limit = IPV6_DEFAULT_HOPLIMIT;
4392 if (!send_only) {
4393 err = cma_igmp_send(ndev, &mc->multicast.ib->rec.mgid,
4394 true);
4395 }
4396 }
4397 } else {
4398 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP)
4399 err = -ENOTSUPP;
4400 }
4401 dev_put(ndev);
4402 if (err || !mc->multicast.ib->rec.mtu) {
4403 if (!err)
4404 err = -EINVAL;
4405 goto out2;
4406 }
4407 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
4408 &mc->multicast.ib->rec.port_gid);
4409 work->id = id_priv;
4410 work->mc = mc;
4411 INIT_WORK(&work->work, iboe_mcast_work_handler);
4412 kref_get(&mc->mcref);
4413 queue_work(cma_wq, &work->work);
4414
4415 return 0;
4416
4417 out2:
4418 kfree(mc->multicast.ib);
4419 out1:
4420 kfree(work);
4421 return err;
4422 }
4423
4424 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
4425 u8 join_state, void *context)
4426 {
4427 struct rdma_id_private *id_priv;
4428 struct cma_multicast *mc;
4429 int ret;
4430
4431 if (!id->device)
4432 return -EINVAL;
4433
4434 id_priv = container_of(id, struct rdma_id_private, id);
4435 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
4436 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
4437 return -EINVAL;
4438
4439 mc = kmalloc(sizeof *mc, GFP_KERNEL);
4440 if (!mc)
4441 return -ENOMEM;
4442
4443 memcpy(&mc->addr, addr, rdma_addr_size(addr));
4444 mc->context = context;
4445 mc->id_priv = id_priv;
4446 mc->join_state = join_state;
4447
4448 if (rdma_protocol_roce(id->device, id->port_num)) {
4449 kref_init(&mc->mcref);
4450 ret = cma_iboe_join_multicast(id_priv, mc);
4451 if (ret)
4452 goto out_err;
4453 } else if (rdma_cap_ib_mcast(id->device, id->port_num)) {
4454 ret = cma_join_ib_multicast(id_priv, mc);
4455 if (ret)
4456 goto out_err;
4457 } else {
4458 ret = -ENOSYS;
4459 goto out_err;
4460 }
4461
4462 spin_lock(&id_priv->lock);
4463 list_add(&mc->list, &id_priv->mc_list);
4464 spin_unlock(&id_priv->lock);
4465
4466 return 0;
4467 out_err:
4468 kfree(mc);
4469 return ret;
4470 }
4471 EXPORT_SYMBOL(rdma_join_multicast);
4472
4473 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
4474 {
4475 struct rdma_id_private *id_priv;
4476 struct cma_multicast *mc;
4477
4478 id_priv = container_of(id, struct rdma_id_private, id);
4479 spin_lock_irq(&id_priv->lock);
4480 list_for_each_entry(mc, &id_priv->mc_list, list) {
4481 if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) {
4482 list_del(&mc->list);
4483 spin_unlock_irq(&id_priv->lock);
4484
4485 if (id->qp)
4486 ib_detach_mcast(id->qp,
4487 &mc->multicast.ib->rec.mgid,
4488 be16_to_cpu(mc->multicast.ib->rec.mlid));
4489
4490 BUG_ON(id_priv->cma_dev->device != id->device);
4491
4492 if (rdma_cap_ib_mcast(id->device, id->port_num)) {
4493 ib_sa_free_multicast(mc->multicast.ib);
4494 kfree(mc);
4495 } else if (rdma_protocol_roce(id->device, id->port_num)) {
4496 cma_leave_roce_mc_group(id_priv, mc);
4497 }
4498 return;
4499 }
4500 }
4501 spin_unlock_irq(&id_priv->lock);
4502 }
4503 EXPORT_SYMBOL(rdma_leave_multicast);
4504
4505 static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
4506 {
4507 struct rdma_dev_addr *dev_addr;
4508 struct cma_ndev_work *work;
4509
4510 dev_addr = &id_priv->id.route.addr.dev_addr;
4511
4512 if ((dev_addr->bound_dev_if == ndev->ifindex) &&
4513 (net_eq(dev_net(ndev), dev_addr->net)) &&
4514 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
4515 pr_info("RDMA CM addr change for ndev %s used by id %p\n",
4516 ndev->name, &id_priv->id);
4517 work = kzalloc(sizeof *work, GFP_KERNEL);
4518 if (!work)
4519 return -ENOMEM;
4520
4521 INIT_WORK(&work->work, cma_ndev_work_handler);
4522 work->id = id_priv;
4523 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
4524 atomic_inc(&id_priv->refcount);
4525 queue_work(cma_wq, &work->work);
4526 }
4527
4528 return 0;
4529 }
4530
4531 static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
4532 void *ptr)
4533 {
4534 struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
4535 struct cma_device *cma_dev;
4536 struct rdma_id_private *id_priv;
4537 int ret = NOTIFY_DONE;
4538
4539 if (event != NETDEV_BONDING_FAILOVER)
4540 return NOTIFY_DONE;
4541
4542 if (!netif_is_bond_master(ndev))
4543 return NOTIFY_DONE;
4544
4545 mutex_lock(&lock);
4546 list_for_each_entry(cma_dev, &dev_list, list)
4547 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
4548 ret = cma_netdev_change(ndev, id_priv);
4549 if (ret)
4550 goto out;
4551 }
4552
4553 out:
4554 mutex_unlock(&lock);
4555 return ret;
4556 }
4557
4558 static struct notifier_block cma_nb = {
4559 .notifier_call = cma_netdev_callback
4560 };
4561
4562 static void cma_add_one(struct ib_device *device)
4563 {
4564 struct cma_device *cma_dev;
4565 struct rdma_id_private *id_priv;
4566 unsigned int i;
4567 unsigned long supported_gids = 0;
4568
4569 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
4570 if (!cma_dev)
4571 return;
4572
4573 cma_dev->device = device;
4574 cma_dev->default_gid_type = kcalloc(device->phys_port_cnt,
4575 sizeof(*cma_dev->default_gid_type),
4576 GFP_KERNEL);
4577 if (!cma_dev->default_gid_type)
4578 goto free_cma_dev;
4579
4580 cma_dev->default_roce_tos = kcalloc(device->phys_port_cnt,
4581 sizeof(*cma_dev->default_roce_tos),
4582 GFP_KERNEL);
4583 if (!cma_dev->default_roce_tos)
4584 goto free_gid_type;
4585
4586 rdma_for_each_port (device, i) {
4587 supported_gids = roce_gid_type_mask_support(device, i);
4588 WARN_ON(!supported_gids);
4589 if (supported_gids & (1 << CMA_PREFERRED_ROCE_GID_TYPE))
4590 cma_dev->default_gid_type[i - rdma_start_port(device)] =
4591 CMA_PREFERRED_ROCE_GID_TYPE;
4592 else
4593 cma_dev->default_gid_type[i - rdma_start_port(device)] =
4594 find_first_bit(&supported_gids, BITS_PER_LONG);
4595 cma_dev->default_roce_tos[i - rdma_start_port(device)] = 0;
4596 }
4597
4598 init_completion(&cma_dev->comp);
4599 atomic_set(&cma_dev->refcount, 1);
4600 INIT_LIST_HEAD(&cma_dev->id_list);
4601 ib_set_client_data(device, &cma_client, cma_dev);
4602
4603 mutex_lock(&lock);
4604 list_add_tail(&cma_dev->list, &dev_list);
4605 list_for_each_entry(id_priv, &listen_any_list, list)
4606 cma_listen_on_dev(id_priv, cma_dev);
4607 mutex_unlock(&lock);
4608
4609 return;
4610
4611 free_gid_type:
4612 kfree(cma_dev->default_gid_type);
4613
4614 free_cma_dev:
4615 kfree(cma_dev);
4616
4617 return;
4618 }
4619
4620 static int cma_remove_id_dev(struct rdma_id_private *id_priv)
4621 {
4622 struct rdma_cm_event event = {};
4623 enum rdma_cm_state state;
4624 int ret = 0;
4625
4626
4627 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
4628 if (state == RDMA_CM_DESTROYING)
4629 return 0;
4630
4631 cma_cancel_operation(id_priv, state);
4632 mutex_lock(&id_priv->handler_mutex);
4633
4634
4635 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
4636 goto out;
4637
4638 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
4639 ret = id_priv->id.event_handler(&id_priv->id, &event);
4640 out:
4641 mutex_unlock(&id_priv->handler_mutex);
4642 return ret;
4643 }
4644
4645 static void cma_process_remove(struct cma_device *cma_dev)
4646 {
4647 struct rdma_id_private *id_priv;
4648 int ret;
4649
4650 mutex_lock(&lock);
4651 while (!list_empty(&cma_dev->id_list)) {
4652 id_priv = list_entry(cma_dev->id_list.next,
4653 struct rdma_id_private, list);
4654
4655 list_del(&id_priv->listen_list);
4656 list_del_init(&id_priv->list);
4657 atomic_inc(&id_priv->refcount);
4658 mutex_unlock(&lock);
4659
4660 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
4661 cma_deref_id(id_priv);
4662 if (ret)
4663 rdma_destroy_id(&id_priv->id);
4664
4665 mutex_lock(&lock);
4666 }
4667 mutex_unlock(&lock);
4668
4669 cma_deref_dev(cma_dev);
4670 wait_for_completion(&cma_dev->comp);
4671 }
4672
4673 static void cma_remove_one(struct ib_device *device, void *client_data)
4674 {
4675 struct cma_device *cma_dev = client_data;
4676
4677 if (!cma_dev)
4678 return;
4679
4680 mutex_lock(&lock);
4681 list_del(&cma_dev->list);
4682 mutex_unlock(&lock);
4683
4684 cma_process_remove(cma_dev);
4685 kfree(cma_dev->default_roce_tos);
4686 kfree(cma_dev->default_gid_type);
4687 kfree(cma_dev);
4688 }
4689
4690 static int cma_init_net(struct net *net)
4691 {
4692 struct cma_pernet *pernet = cma_pernet(net);
4693
4694 xa_init(&pernet->tcp_ps);
4695 xa_init(&pernet->udp_ps);
4696 xa_init(&pernet->ipoib_ps);
4697 xa_init(&pernet->ib_ps);
4698
4699 return 0;
4700 }
4701
4702 static void cma_exit_net(struct net *net)
4703 {
4704 struct cma_pernet *pernet = cma_pernet(net);
4705
4706 WARN_ON(!xa_empty(&pernet->tcp_ps));
4707 WARN_ON(!xa_empty(&pernet->udp_ps));
4708 WARN_ON(!xa_empty(&pernet->ipoib_ps));
4709 WARN_ON(!xa_empty(&pernet->ib_ps));
4710 }
4711
4712 static struct pernet_operations cma_pernet_operations = {
4713 .init = cma_init_net,
4714 .exit = cma_exit_net,
4715 .id = &cma_pernet_id,
4716 .size = sizeof(struct cma_pernet),
4717 };
4718
4719 static int __init cma_init(void)
4720 {
4721 int ret;
4722
4723
4724
4725
4726
4727
4728
4729 if (IS_ENABLED(CONFIG_LOCKDEP)) {
4730 rtnl_lock();
4731 mutex_lock(&lock);
4732 mutex_unlock(&lock);
4733 rtnl_unlock();
4734 }
4735
4736 cma_wq = alloc_ordered_workqueue("rdma_cm", WQ_MEM_RECLAIM);
4737 if (!cma_wq)
4738 return -ENOMEM;
4739
4740 ret = register_pernet_subsys(&cma_pernet_operations);
4741 if (ret)
4742 goto err_wq;
4743
4744 ib_sa_register_client(&sa_client);
4745 register_netdevice_notifier(&cma_nb);
4746
4747 ret = ib_register_client(&cma_client);
4748 if (ret)
4749 goto err;
4750
4751 ret = cma_configfs_init();
4752 if (ret)
4753 goto err_ib;
4754
4755 return 0;
4756
4757 err_ib:
4758 ib_unregister_client(&cma_client);
4759 err:
4760 unregister_netdevice_notifier(&cma_nb);
4761 ib_sa_unregister_client(&sa_client);
4762 unregister_pernet_subsys(&cma_pernet_operations);
4763 err_wq:
4764 destroy_workqueue(cma_wq);
4765 return ret;
4766 }
4767
4768 static void __exit cma_cleanup(void)
4769 {
4770 cma_configfs_exit();
4771 ib_unregister_client(&cma_client);
4772 unregister_netdevice_notifier(&cma_nb);
4773 ib_sa_unregister_client(&sa_client);
4774 unregister_pernet_subsys(&cma_pernet_operations);
4775 destroy_workqueue(cma_wq);
4776 }
4777
4778 module_init(cma_init);
4779 module_exit(cma_cleanup);