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e51060f0 SH |
1 | /* |
2 | * Copyright (c) 2005 Voltaire Inc. All rights reserved. | |
3 | * Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved. | |
4 | * Copyright (c) 1999-2005, Mellanox Technologies, Inc. All rights reserved. | |
5 | * Copyright (c) 2005-2006 Intel Corporation. All rights reserved. | |
6 | * | |
7 | * This Software is licensed under one of the following licenses: | |
8 | * | |
9 | * 1) under the terms of the "Common Public License 1.0" a copy of which is | |
10 | * available from the Open Source Initiative, see | |
11 | * http://www.opensource.org/licenses/cpl.php. | |
12 | * | |
13 | * 2) under the terms of the "The BSD License" a copy of which is | |
14 | * available from the Open Source Initiative, see | |
15 | * http://www.opensource.org/licenses/bsd-license.php. | |
16 | * | |
17 | * 3) under the terms of the "GNU General Public License (GPL) Version 2" a | |
18 | * copy of which is available from the Open Source Initiative, see | |
19 | * http://www.opensource.org/licenses/gpl-license.php. | |
20 | * | |
21 | * Licensee has the right to choose one of the above licenses. | |
22 | * | |
23 | * Redistributions of source code must retain the above copyright | |
24 | * notice and one of the license notices. | |
25 | * | |
26 | * Redistributions in binary form must reproduce both the above copyright | |
27 | * notice, one of the license notices in the documentation | |
28 | * and/or other materials provided with the distribution. | |
29 | * | |
30 | */ | |
31 | ||
32 | #include <linux/completion.h> | |
33 | #include <linux/in.h> | |
34 | #include <linux/in6.h> | |
35 | #include <linux/mutex.h> | |
36 | #include <linux/random.h> | |
37 | #include <linux/idr.h> | |
38 | ||
39 | #include <net/tcp.h> | |
40 | ||
41 | #include <rdma/rdma_cm.h> | |
42 | #include <rdma/rdma_cm_ib.h> | |
43 | #include <rdma/ib_cache.h> | |
44 | #include <rdma/ib_cm.h> | |
45 | #include <rdma/ib_sa.h> | |
46 | ||
47 | MODULE_AUTHOR("Sean Hefty"); | |
48 | MODULE_DESCRIPTION("Generic RDMA CM Agent"); | |
49 | MODULE_LICENSE("Dual BSD/GPL"); | |
50 | ||
51 | #define CMA_CM_RESPONSE_TIMEOUT 20 | |
52 | #define CMA_MAX_CM_RETRIES 3 | |
53 | ||
54 | static void cma_add_one(struct ib_device *device); | |
55 | static void cma_remove_one(struct ib_device *device); | |
56 | ||
57 | static struct ib_client cma_client = { | |
58 | .name = "cma", | |
59 | .add = cma_add_one, | |
60 | .remove = cma_remove_one | |
61 | }; | |
62 | ||
63 | static LIST_HEAD(dev_list); | |
64 | static LIST_HEAD(listen_any_list); | |
65 | static DEFINE_MUTEX(lock); | |
66 | static struct workqueue_struct *cma_wq; | |
67 | static DEFINE_IDR(sdp_ps); | |
68 | static DEFINE_IDR(tcp_ps); | |
69 | ||
70 | struct cma_device { | |
71 | struct list_head list; | |
72 | struct ib_device *device; | |
73 | __be64 node_guid; | |
74 | struct completion comp; | |
75 | atomic_t refcount; | |
76 | struct list_head id_list; | |
77 | }; | |
78 | ||
79 | enum cma_state { | |
80 | CMA_IDLE, | |
81 | CMA_ADDR_QUERY, | |
82 | CMA_ADDR_RESOLVED, | |
83 | CMA_ROUTE_QUERY, | |
84 | CMA_ROUTE_RESOLVED, | |
85 | CMA_CONNECT, | |
86 | CMA_DISCONNECT, | |
87 | CMA_ADDR_BOUND, | |
88 | CMA_LISTEN, | |
89 | CMA_DEVICE_REMOVAL, | |
90 | CMA_DESTROYING | |
91 | }; | |
92 | ||
93 | struct rdma_bind_list { | |
94 | struct idr *ps; | |
95 | struct hlist_head owners; | |
96 | unsigned short port; | |
97 | }; | |
98 | ||
99 | /* | |
100 | * Device removal can occur at anytime, so we need extra handling to | |
101 | * serialize notifying the user of device removal with other callbacks. | |
102 | * We do this by disabling removal notification while a callback is in process, | |
103 | * and reporting it after the callback completes. | |
104 | */ | |
105 | struct rdma_id_private { | |
106 | struct rdma_cm_id id; | |
107 | ||
108 | struct rdma_bind_list *bind_list; | |
109 | struct hlist_node node; | |
110 | struct list_head list; | |
111 | struct list_head listen_list; | |
112 | struct cma_device *cma_dev; | |
113 | ||
114 | enum cma_state state; | |
115 | spinlock_t lock; | |
116 | struct completion comp; | |
117 | atomic_t refcount; | |
118 | wait_queue_head_t wait_remove; | |
119 | atomic_t dev_remove; | |
120 | ||
121 | int backlog; | |
122 | int timeout_ms; | |
123 | struct ib_sa_query *query; | |
124 | int query_id; | |
125 | union { | |
126 | struct ib_cm_id *ib; | |
127 | } cm_id; | |
128 | ||
129 | u32 seq_num; | |
130 | u32 qp_num; | |
131 | enum ib_qp_type qp_type; | |
132 | u8 srq; | |
133 | }; | |
134 | ||
135 | struct cma_work { | |
136 | struct work_struct work; | |
137 | struct rdma_id_private *id; | |
138 | enum cma_state old_state; | |
139 | enum cma_state new_state; | |
140 | struct rdma_cm_event event; | |
141 | }; | |
142 | ||
143 | union cma_ip_addr { | |
144 | struct in6_addr ip6; | |
145 | struct { | |
146 | __u32 pad[3]; | |
147 | __u32 addr; | |
148 | } ip4; | |
149 | }; | |
150 | ||
151 | struct cma_hdr { | |
152 | u8 cma_version; | |
153 | u8 ip_version; /* IP version: 7:4 */ | |
154 | __u16 port; | |
155 | union cma_ip_addr src_addr; | |
156 | union cma_ip_addr dst_addr; | |
157 | }; | |
158 | ||
159 | struct sdp_hh { | |
160 | u8 bsdh[16]; | |
161 | u8 sdp_version; /* Major version: 7:4 */ | |
162 | u8 ip_version; /* IP version: 7:4 */ | |
163 | u8 sdp_specific1[10]; | |
164 | __u16 port; | |
165 | __u16 sdp_specific2; | |
166 | union cma_ip_addr src_addr; | |
167 | union cma_ip_addr dst_addr; | |
168 | }; | |
169 | ||
170 | struct sdp_hah { | |
171 | u8 bsdh[16]; | |
172 | u8 sdp_version; | |
173 | }; | |
174 | ||
175 | #define CMA_VERSION 0x00 | |
176 | #define SDP_MAJ_VERSION 0x2 | |
177 | ||
178 | static int cma_comp(struct rdma_id_private *id_priv, enum cma_state comp) | |
179 | { | |
180 | unsigned long flags; | |
181 | int ret; | |
182 | ||
183 | spin_lock_irqsave(&id_priv->lock, flags); | |
184 | ret = (id_priv->state == comp); | |
185 | spin_unlock_irqrestore(&id_priv->lock, flags); | |
186 | return ret; | |
187 | } | |
188 | ||
189 | static int cma_comp_exch(struct rdma_id_private *id_priv, | |
190 | enum cma_state comp, enum cma_state exch) | |
191 | { | |
192 | unsigned long flags; | |
193 | int ret; | |
194 | ||
195 | spin_lock_irqsave(&id_priv->lock, flags); | |
196 | if ((ret = (id_priv->state == comp))) | |
197 | id_priv->state = exch; | |
198 | spin_unlock_irqrestore(&id_priv->lock, flags); | |
199 | return ret; | |
200 | } | |
201 | ||
202 | static enum cma_state cma_exch(struct rdma_id_private *id_priv, | |
203 | enum cma_state exch) | |
204 | { | |
205 | unsigned long flags; | |
206 | enum cma_state old; | |
207 | ||
208 | spin_lock_irqsave(&id_priv->lock, flags); | |
209 | old = id_priv->state; | |
210 | id_priv->state = exch; | |
211 | spin_unlock_irqrestore(&id_priv->lock, flags); | |
212 | return old; | |
213 | } | |
214 | ||
215 | static inline u8 cma_get_ip_ver(struct cma_hdr *hdr) | |
216 | { | |
217 | return hdr->ip_version >> 4; | |
218 | } | |
219 | ||
220 | static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver) | |
221 | { | |
222 | hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF); | |
223 | } | |
224 | ||
225 | static inline u8 sdp_get_majv(u8 sdp_version) | |
226 | { | |
227 | return sdp_version >> 4; | |
228 | } | |
229 | ||
230 | static inline u8 sdp_get_ip_ver(struct sdp_hh *hh) | |
231 | { | |
232 | return hh->ip_version >> 4; | |
233 | } | |
234 | ||
235 | static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver) | |
236 | { | |
237 | hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF); | |
238 | } | |
239 | ||
240 | static void cma_attach_to_dev(struct rdma_id_private *id_priv, | |
241 | struct cma_device *cma_dev) | |
242 | { | |
243 | atomic_inc(&cma_dev->refcount); | |
244 | id_priv->cma_dev = cma_dev; | |
245 | id_priv->id.device = cma_dev->device; | |
246 | list_add_tail(&id_priv->list, &cma_dev->id_list); | |
247 | } | |
248 | ||
249 | static inline void cma_deref_dev(struct cma_device *cma_dev) | |
250 | { | |
251 | if (atomic_dec_and_test(&cma_dev->refcount)) | |
252 | complete(&cma_dev->comp); | |
253 | } | |
254 | ||
255 | static void cma_detach_from_dev(struct rdma_id_private *id_priv) | |
256 | { | |
257 | list_del(&id_priv->list); | |
258 | cma_deref_dev(id_priv->cma_dev); | |
259 | id_priv->cma_dev = NULL; | |
260 | } | |
261 | ||
262 | static int cma_acquire_ib_dev(struct rdma_id_private *id_priv) | |
263 | { | |
264 | struct cma_device *cma_dev; | |
f0ee3404 | 265 | union ib_gid gid; |
e51060f0 SH |
266 | int ret = -ENODEV; |
267 | ||
f0ee3404 | 268 | ib_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid), |
e51060f0 SH |
269 | |
270 | mutex_lock(&lock); | |
271 | list_for_each_entry(cma_dev, &dev_list, list) { | |
f0ee3404 | 272 | ret = ib_find_cached_gid(cma_dev->device, &gid, |
e51060f0 SH |
273 | &id_priv->id.port_num, NULL); |
274 | if (!ret) { | |
275 | cma_attach_to_dev(id_priv, cma_dev); | |
276 | break; | |
277 | } | |
278 | } | |
279 | mutex_unlock(&lock); | |
280 | return ret; | |
281 | } | |
282 | ||
283 | static int cma_acquire_dev(struct rdma_id_private *id_priv) | |
284 | { | |
285 | switch (id_priv->id.route.addr.dev_addr.dev_type) { | |
286 | case IB_NODE_CA: | |
287 | return cma_acquire_ib_dev(id_priv); | |
288 | default: | |
289 | return -ENODEV; | |
290 | } | |
291 | } | |
292 | ||
293 | static void cma_deref_id(struct rdma_id_private *id_priv) | |
294 | { | |
295 | if (atomic_dec_and_test(&id_priv->refcount)) | |
296 | complete(&id_priv->comp); | |
297 | } | |
298 | ||
299 | static void cma_release_remove(struct rdma_id_private *id_priv) | |
300 | { | |
301 | if (atomic_dec_and_test(&id_priv->dev_remove)) | |
302 | wake_up(&id_priv->wait_remove); | |
303 | } | |
304 | ||
305 | struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler, | |
306 | void *context, enum rdma_port_space ps) | |
307 | { | |
308 | struct rdma_id_private *id_priv; | |
309 | ||
310 | id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL); | |
311 | if (!id_priv) | |
312 | return ERR_PTR(-ENOMEM); | |
313 | ||
314 | id_priv->state = CMA_IDLE; | |
315 | id_priv->id.context = context; | |
316 | id_priv->id.event_handler = event_handler; | |
317 | id_priv->id.ps = ps; | |
318 | spin_lock_init(&id_priv->lock); | |
319 | init_completion(&id_priv->comp); | |
320 | atomic_set(&id_priv->refcount, 1); | |
321 | init_waitqueue_head(&id_priv->wait_remove); | |
322 | atomic_set(&id_priv->dev_remove, 0); | |
323 | INIT_LIST_HEAD(&id_priv->listen_list); | |
324 | get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num); | |
325 | ||
326 | return &id_priv->id; | |
327 | } | |
328 | EXPORT_SYMBOL(rdma_create_id); | |
329 | ||
330 | static int cma_init_ib_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) | |
331 | { | |
332 | struct ib_qp_attr qp_attr; | |
333 | struct rdma_dev_addr *dev_addr; | |
334 | int ret; | |
335 | ||
336 | dev_addr = &id_priv->id.route.addr.dev_addr; | |
337 | ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num, | |
338 | ib_addr_get_pkey(dev_addr), | |
339 | &qp_attr.pkey_index); | |
340 | if (ret) | |
341 | return ret; | |
342 | ||
343 | qp_attr.qp_state = IB_QPS_INIT; | |
344 | qp_attr.qp_access_flags = IB_ACCESS_LOCAL_WRITE; | |
345 | qp_attr.port_num = id_priv->id.port_num; | |
346 | return ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_ACCESS_FLAGS | | |
347 | IB_QP_PKEY_INDEX | IB_QP_PORT); | |
348 | } | |
349 | ||
350 | int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd, | |
351 | struct ib_qp_init_attr *qp_init_attr) | |
352 | { | |
353 | struct rdma_id_private *id_priv; | |
354 | struct ib_qp *qp; | |
355 | int ret; | |
356 | ||
357 | id_priv = container_of(id, struct rdma_id_private, id); | |
358 | if (id->device != pd->device) | |
359 | return -EINVAL; | |
360 | ||
361 | qp = ib_create_qp(pd, qp_init_attr); | |
362 | if (IS_ERR(qp)) | |
363 | return PTR_ERR(qp); | |
364 | ||
365 | switch (id->device->node_type) { | |
366 | case IB_NODE_CA: | |
367 | ret = cma_init_ib_qp(id_priv, qp); | |
368 | break; | |
369 | default: | |
370 | ret = -ENOSYS; | |
371 | break; | |
372 | } | |
373 | ||
374 | if (ret) | |
375 | goto err; | |
376 | ||
377 | id->qp = qp; | |
378 | id_priv->qp_num = qp->qp_num; | |
379 | id_priv->qp_type = qp->qp_type; | |
380 | id_priv->srq = (qp->srq != NULL); | |
381 | return 0; | |
382 | err: | |
383 | ib_destroy_qp(qp); | |
384 | return ret; | |
385 | } | |
386 | EXPORT_SYMBOL(rdma_create_qp); | |
387 | ||
388 | void rdma_destroy_qp(struct rdma_cm_id *id) | |
389 | { | |
390 | ib_destroy_qp(id->qp); | |
391 | } | |
392 | EXPORT_SYMBOL(rdma_destroy_qp); | |
393 | ||
394 | static int cma_modify_qp_rtr(struct rdma_cm_id *id) | |
395 | { | |
396 | struct ib_qp_attr qp_attr; | |
397 | int qp_attr_mask, ret; | |
398 | ||
399 | if (!id->qp) | |
400 | return 0; | |
401 | ||
402 | /* Need to update QP attributes from default values. */ | |
403 | qp_attr.qp_state = IB_QPS_INIT; | |
404 | ret = rdma_init_qp_attr(id, &qp_attr, &qp_attr_mask); | |
405 | if (ret) | |
406 | return ret; | |
407 | ||
408 | ret = ib_modify_qp(id->qp, &qp_attr, qp_attr_mask); | |
409 | if (ret) | |
410 | return ret; | |
411 | ||
412 | qp_attr.qp_state = IB_QPS_RTR; | |
413 | ret = rdma_init_qp_attr(id, &qp_attr, &qp_attr_mask); | |
414 | if (ret) | |
415 | return ret; | |
416 | ||
417 | return ib_modify_qp(id->qp, &qp_attr, qp_attr_mask); | |
418 | } | |
419 | ||
420 | static int cma_modify_qp_rts(struct rdma_cm_id *id) | |
421 | { | |
422 | struct ib_qp_attr qp_attr; | |
423 | int qp_attr_mask, ret; | |
424 | ||
425 | if (!id->qp) | |
426 | return 0; | |
427 | ||
428 | qp_attr.qp_state = IB_QPS_RTS; | |
429 | ret = rdma_init_qp_attr(id, &qp_attr, &qp_attr_mask); | |
430 | if (ret) | |
431 | return ret; | |
432 | ||
433 | return ib_modify_qp(id->qp, &qp_attr, qp_attr_mask); | |
434 | } | |
435 | ||
436 | static int cma_modify_qp_err(struct rdma_cm_id *id) | |
437 | { | |
438 | struct ib_qp_attr qp_attr; | |
439 | ||
440 | if (!id->qp) | |
441 | return 0; | |
442 | ||
443 | qp_attr.qp_state = IB_QPS_ERR; | |
444 | return ib_modify_qp(id->qp, &qp_attr, IB_QP_STATE); | |
445 | } | |
446 | ||
447 | int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr, | |
448 | int *qp_attr_mask) | |
449 | { | |
450 | struct rdma_id_private *id_priv; | |
451 | int ret; | |
452 | ||
453 | id_priv = container_of(id, struct rdma_id_private, id); | |
454 | switch (id_priv->id.device->node_type) { | |
455 | case IB_NODE_CA: | |
456 | ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr, | |
457 | qp_attr_mask); | |
458 | if (qp_attr->qp_state == IB_QPS_RTR) | |
459 | qp_attr->rq_psn = id_priv->seq_num; | |
460 | break; | |
461 | default: | |
462 | ret = -ENOSYS; | |
463 | break; | |
464 | } | |
465 | ||
466 | return ret; | |
467 | } | |
468 | EXPORT_SYMBOL(rdma_init_qp_attr); | |
469 | ||
470 | static inline int cma_zero_addr(struct sockaddr *addr) | |
471 | { | |
472 | struct in6_addr *ip6; | |
473 | ||
474 | if (addr->sa_family == AF_INET) | |
475 | return ZERONET(((struct sockaddr_in *) addr)->sin_addr.s_addr); | |
476 | else { | |
477 | ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr; | |
478 | return (ip6->s6_addr32[0] | ip6->s6_addr32[1] | | |
5fd571cb | 479 | ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0; |
e51060f0 SH |
480 | } |
481 | } | |
482 | ||
483 | static inline int cma_loopback_addr(struct sockaddr *addr) | |
484 | { | |
485 | return LOOPBACK(((struct sockaddr_in *) addr)->sin_addr.s_addr); | |
486 | } | |
487 | ||
488 | static inline int cma_any_addr(struct sockaddr *addr) | |
489 | { | |
490 | return cma_zero_addr(addr) || cma_loopback_addr(addr); | |
491 | } | |
492 | ||
493 | static inline int cma_any_port(struct sockaddr *addr) | |
494 | { | |
495 | return !((struct sockaddr_in *) addr)->sin_port; | |
496 | } | |
497 | ||
498 | static int cma_get_net_info(void *hdr, enum rdma_port_space ps, | |
499 | u8 *ip_ver, __u16 *port, | |
500 | union cma_ip_addr **src, union cma_ip_addr **dst) | |
501 | { | |
502 | switch (ps) { | |
503 | case RDMA_PS_SDP: | |
504 | if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) != | |
505 | SDP_MAJ_VERSION) | |
506 | return -EINVAL; | |
507 | ||
508 | *ip_ver = sdp_get_ip_ver(hdr); | |
509 | *port = ((struct sdp_hh *) hdr)->port; | |
510 | *src = &((struct sdp_hh *) hdr)->src_addr; | |
511 | *dst = &((struct sdp_hh *) hdr)->dst_addr; | |
512 | break; | |
513 | default: | |
514 | if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION) | |
515 | return -EINVAL; | |
516 | ||
517 | *ip_ver = cma_get_ip_ver(hdr); | |
518 | *port = ((struct cma_hdr *) hdr)->port; | |
519 | *src = &((struct cma_hdr *) hdr)->src_addr; | |
520 | *dst = &((struct cma_hdr *) hdr)->dst_addr; | |
521 | break; | |
522 | } | |
523 | ||
524 | if (*ip_ver != 4 && *ip_ver != 6) | |
525 | return -EINVAL; | |
526 | return 0; | |
527 | } | |
528 | ||
529 | static void cma_save_net_info(struct rdma_addr *addr, | |
530 | struct rdma_addr *listen_addr, | |
531 | u8 ip_ver, __u16 port, | |
532 | union cma_ip_addr *src, union cma_ip_addr *dst) | |
533 | { | |
534 | struct sockaddr_in *listen4, *ip4; | |
535 | struct sockaddr_in6 *listen6, *ip6; | |
536 | ||
537 | switch (ip_ver) { | |
538 | case 4: | |
539 | listen4 = (struct sockaddr_in *) &listen_addr->src_addr; | |
540 | ip4 = (struct sockaddr_in *) &addr->src_addr; | |
541 | ip4->sin_family = listen4->sin_family; | |
542 | ip4->sin_addr.s_addr = dst->ip4.addr; | |
543 | ip4->sin_port = listen4->sin_port; | |
544 | ||
545 | ip4 = (struct sockaddr_in *) &addr->dst_addr; | |
546 | ip4->sin_family = listen4->sin_family; | |
547 | ip4->sin_addr.s_addr = src->ip4.addr; | |
548 | ip4->sin_port = port; | |
549 | break; | |
550 | case 6: | |
551 | listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr; | |
552 | ip6 = (struct sockaddr_in6 *) &addr->src_addr; | |
553 | ip6->sin6_family = listen6->sin6_family; | |
554 | ip6->sin6_addr = dst->ip6; | |
555 | ip6->sin6_port = listen6->sin6_port; | |
556 | ||
557 | ip6 = (struct sockaddr_in6 *) &addr->dst_addr; | |
558 | ip6->sin6_family = listen6->sin6_family; | |
559 | ip6->sin6_addr = src->ip6; | |
560 | ip6->sin6_port = port; | |
561 | break; | |
562 | default: | |
563 | break; | |
564 | } | |
565 | } | |
566 | ||
567 | static inline int cma_user_data_offset(enum rdma_port_space ps) | |
568 | { | |
569 | switch (ps) { | |
570 | case RDMA_PS_SDP: | |
571 | return 0; | |
572 | default: | |
573 | return sizeof(struct cma_hdr); | |
574 | } | |
575 | } | |
576 | ||
577 | static int cma_notify_user(struct rdma_id_private *id_priv, | |
578 | enum rdma_cm_event_type type, int status, | |
579 | void *data, u8 data_len) | |
580 | { | |
581 | struct rdma_cm_event event; | |
582 | ||
583 | event.event = type; | |
584 | event.status = status; | |
585 | event.private_data = data; | |
586 | event.private_data_len = data_len; | |
587 | ||
588 | return id_priv->id.event_handler(&id_priv->id, &event); | |
589 | } | |
590 | ||
591 | static void cma_cancel_route(struct rdma_id_private *id_priv) | |
592 | { | |
593 | switch (id_priv->id.device->node_type) { | |
594 | case IB_NODE_CA: | |
595 | if (id_priv->query) | |
596 | ib_sa_cancel_query(id_priv->query_id, id_priv->query); | |
597 | break; | |
598 | default: | |
599 | break; | |
600 | } | |
601 | } | |
602 | ||
603 | static inline int cma_internal_listen(struct rdma_id_private *id_priv) | |
604 | { | |
605 | return (id_priv->state == CMA_LISTEN) && id_priv->cma_dev && | |
606 | cma_any_addr(&id_priv->id.route.addr.src_addr); | |
607 | } | |
608 | ||
609 | static void cma_destroy_listen(struct rdma_id_private *id_priv) | |
610 | { | |
611 | cma_exch(id_priv, CMA_DESTROYING); | |
612 | ||
613 | if (id_priv->cma_dev) { | |
614 | switch (id_priv->id.device->node_type) { | |
615 | case IB_NODE_CA: | |
616 | if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib)) | |
617 | ib_destroy_cm_id(id_priv->cm_id.ib); | |
618 | break; | |
619 | default: | |
620 | break; | |
621 | } | |
622 | cma_detach_from_dev(id_priv); | |
623 | } | |
624 | list_del(&id_priv->listen_list); | |
625 | ||
626 | cma_deref_id(id_priv); | |
627 | wait_for_completion(&id_priv->comp); | |
628 | ||
629 | kfree(id_priv); | |
630 | } | |
631 | ||
632 | static void cma_cancel_listens(struct rdma_id_private *id_priv) | |
633 | { | |
634 | struct rdma_id_private *dev_id_priv; | |
635 | ||
636 | mutex_lock(&lock); | |
637 | list_del(&id_priv->list); | |
638 | ||
639 | while (!list_empty(&id_priv->listen_list)) { | |
640 | dev_id_priv = list_entry(id_priv->listen_list.next, | |
641 | struct rdma_id_private, listen_list); | |
642 | cma_destroy_listen(dev_id_priv); | |
643 | } | |
644 | mutex_unlock(&lock); | |
645 | } | |
646 | ||
647 | static void cma_cancel_operation(struct rdma_id_private *id_priv, | |
648 | enum cma_state state) | |
649 | { | |
650 | switch (state) { | |
651 | case CMA_ADDR_QUERY: | |
652 | rdma_addr_cancel(&id_priv->id.route.addr.dev_addr); | |
653 | break; | |
654 | case CMA_ROUTE_QUERY: | |
655 | cma_cancel_route(id_priv); | |
656 | break; | |
657 | case CMA_LISTEN: | |
658 | if (cma_any_addr(&id_priv->id.route.addr.src_addr) && | |
659 | !id_priv->cma_dev) | |
660 | cma_cancel_listens(id_priv); | |
661 | break; | |
662 | default: | |
663 | break; | |
664 | } | |
665 | } | |
666 | ||
667 | static void cma_release_port(struct rdma_id_private *id_priv) | |
668 | { | |
669 | struct rdma_bind_list *bind_list = id_priv->bind_list; | |
670 | ||
671 | if (!bind_list) | |
672 | return; | |
673 | ||
674 | mutex_lock(&lock); | |
675 | hlist_del(&id_priv->node); | |
676 | if (hlist_empty(&bind_list->owners)) { | |
677 | idr_remove(bind_list->ps, bind_list->port); | |
678 | kfree(bind_list); | |
679 | } | |
680 | mutex_unlock(&lock); | |
681 | } | |
682 | ||
683 | void rdma_destroy_id(struct rdma_cm_id *id) | |
684 | { | |
685 | struct rdma_id_private *id_priv; | |
686 | enum cma_state state; | |
687 | ||
688 | id_priv = container_of(id, struct rdma_id_private, id); | |
689 | state = cma_exch(id_priv, CMA_DESTROYING); | |
690 | cma_cancel_operation(id_priv, state); | |
691 | ||
692 | if (id_priv->cma_dev) { | |
693 | switch (id->device->node_type) { | |
694 | case IB_NODE_CA: | |
695 | if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib)) | |
696 | ib_destroy_cm_id(id_priv->cm_id.ib); | |
697 | break; | |
698 | default: | |
699 | break; | |
700 | } | |
701 | mutex_lock(&lock); | |
702 | cma_detach_from_dev(id_priv); | |
703 | mutex_unlock(&lock); | |
704 | } | |
705 | ||
706 | cma_release_port(id_priv); | |
707 | cma_deref_id(id_priv); | |
708 | wait_for_completion(&id_priv->comp); | |
709 | ||
710 | kfree(id_priv->id.route.path_rec); | |
711 | kfree(id_priv); | |
712 | } | |
713 | EXPORT_SYMBOL(rdma_destroy_id); | |
714 | ||
715 | static int cma_rep_recv(struct rdma_id_private *id_priv) | |
716 | { | |
717 | int ret; | |
718 | ||
719 | ret = cma_modify_qp_rtr(&id_priv->id); | |
720 | if (ret) | |
721 | goto reject; | |
722 | ||
723 | ret = cma_modify_qp_rts(&id_priv->id); | |
724 | if (ret) | |
725 | goto reject; | |
726 | ||
727 | ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0); | |
728 | if (ret) | |
729 | goto reject; | |
730 | ||
731 | return 0; | |
732 | reject: | |
733 | cma_modify_qp_err(&id_priv->id); | |
734 | ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED, | |
735 | NULL, 0, NULL, 0); | |
736 | return ret; | |
737 | } | |
738 | ||
739 | static int cma_verify_rep(struct rdma_id_private *id_priv, void *data) | |
740 | { | |
741 | if (id_priv->id.ps == RDMA_PS_SDP && | |
742 | sdp_get_majv(((struct sdp_hah *) data)->sdp_version) != | |
743 | SDP_MAJ_VERSION) | |
744 | return -EINVAL; | |
745 | ||
746 | return 0; | |
747 | } | |
748 | ||
749 | static int cma_rtu_recv(struct rdma_id_private *id_priv) | |
750 | { | |
751 | int ret; | |
752 | ||
753 | ret = cma_modify_qp_rts(&id_priv->id); | |
754 | if (ret) | |
755 | goto reject; | |
756 | ||
757 | return 0; | |
758 | reject: | |
759 | cma_modify_qp_err(&id_priv->id); | |
760 | ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED, | |
761 | NULL, 0, NULL, 0); | |
762 | return ret; | |
763 | } | |
764 | ||
765 | static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) | |
766 | { | |
767 | struct rdma_id_private *id_priv = cm_id->context; | |
768 | enum rdma_cm_event_type event; | |
769 | u8 private_data_len = 0; | |
770 | int ret = 0, status = 0; | |
771 | ||
772 | atomic_inc(&id_priv->dev_remove); | |
773 | if (!cma_comp(id_priv, CMA_CONNECT)) | |
774 | goto out; | |
775 | ||
776 | switch (ib_event->event) { | |
777 | case IB_CM_REQ_ERROR: | |
778 | case IB_CM_REP_ERROR: | |
779 | event = RDMA_CM_EVENT_UNREACHABLE; | |
780 | status = -ETIMEDOUT; | |
781 | break; | |
782 | case IB_CM_REP_RECEIVED: | |
783 | status = cma_verify_rep(id_priv, ib_event->private_data); | |
784 | if (status) | |
785 | event = RDMA_CM_EVENT_CONNECT_ERROR; | |
786 | else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) { | |
787 | status = cma_rep_recv(id_priv); | |
788 | event = status ? RDMA_CM_EVENT_CONNECT_ERROR : | |
789 | RDMA_CM_EVENT_ESTABLISHED; | |
790 | } else | |
791 | event = RDMA_CM_EVENT_CONNECT_RESPONSE; | |
792 | private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE; | |
793 | break; | |
794 | case IB_CM_RTU_RECEIVED: | |
795 | status = cma_rtu_recv(id_priv); | |
796 | event = status ? RDMA_CM_EVENT_CONNECT_ERROR : | |
797 | RDMA_CM_EVENT_ESTABLISHED; | |
798 | break; | |
799 | case IB_CM_DREQ_ERROR: | |
800 | status = -ETIMEDOUT; /* fall through */ | |
801 | case IB_CM_DREQ_RECEIVED: | |
802 | case IB_CM_DREP_RECEIVED: | |
803 | if (!cma_comp_exch(id_priv, CMA_CONNECT, CMA_DISCONNECT)) | |
804 | goto out; | |
805 | event = RDMA_CM_EVENT_DISCONNECTED; | |
806 | break; | |
807 | case IB_CM_TIMEWAIT_EXIT: | |
808 | case IB_CM_MRA_RECEIVED: | |
809 | /* ignore event */ | |
810 | goto out; | |
811 | case IB_CM_REJ_RECEIVED: | |
812 | cma_modify_qp_err(&id_priv->id); | |
813 | status = ib_event->param.rej_rcvd.reason; | |
814 | event = RDMA_CM_EVENT_REJECTED; | |
74f76fba | 815 | private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; |
e51060f0 SH |
816 | break; |
817 | default: | |
818 | printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d", | |
819 | ib_event->event); | |
820 | goto out; | |
821 | } | |
822 | ||
823 | ret = cma_notify_user(id_priv, event, status, ib_event->private_data, | |
824 | private_data_len); | |
825 | if (ret) { | |
826 | /* Destroy the CM ID by returning a non-zero value. */ | |
827 | id_priv->cm_id.ib = NULL; | |
828 | cma_exch(id_priv, CMA_DESTROYING); | |
829 | cma_release_remove(id_priv); | |
830 | rdma_destroy_id(&id_priv->id); | |
831 | return ret; | |
832 | } | |
833 | out: | |
834 | cma_release_remove(id_priv); | |
835 | return ret; | |
836 | } | |
837 | ||
838 | static struct rdma_id_private *cma_new_id(struct rdma_cm_id *listen_id, | |
839 | struct ib_cm_event *ib_event) | |
840 | { | |
841 | struct rdma_id_private *id_priv; | |
842 | struct rdma_cm_id *id; | |
843 | struct rdma_route *rt; | |
844 | union cma_ip_addr *src, *dst; | |
845 | __u16 port; | |
846 | u8 ip_ver; | |
847 | ||
848 | id = rdma_create_id(listen_id->event_handler, listen_id->context, | |
849 | listen_id->ps); | |
850 | if (IS_ERR(id)) | |
851 | return NULL; | |
852 | ||
853 | rt = &id->route; | |
854 | rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1; | |
855 | rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths, GFP_KERNEL); | |
856 | if (!rt->path_rec) | |
857 | goto err; | |
858 | ||
859 | if (cma_get_net_info(ib_event->private_data, listen_id->ps, | |
860 | &ip_ver, &port, &src, &dst)) | |
861 | goto err; | |
862 | ||
863 | cma_save_net_info(&id->route.addr, &listen_id->route.addr, | |
864 | ip_ver, port, src, dst); | |
865 | rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path; | |
866 | if (rt->num_paths == 2) | |
867 | rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path; | |
868 | ||
869 | ib_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid); | |
870 | ib_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid); | |
871 | ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey)); | |
872 | rt->addr.dev_addr.dev_type = IB_NODE_CA; | |
873 | ||
874 | id_priv = container_of(id, struct rdma_id_private, id); | |
875 | id_priv->state = CMA_CONNECT; | |
876 | return id_priv; | |
877 | err: | |
878 | rdma_destroy_id(id); | |
879 | return NULL; | |
880 | } | |
881 | ||
882 | static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) | |
883 | { | |
884 | struct rdma_id_private *listen_id, *conn_id; | |
885 | int offset, ret; | |
886 | ||
887 | listen_id = cm_id->context; | |
888 | atomic_inc(&listen_id->dev_remove); | |
889 | if (!cma_comp(listen_id, CMA_LISTEN)) { | |
890 | ret = -ECONNABORTED; | |
891 | goto out; | |
892 | } | |
893 | ||
894 | conn_id = cma_new_id(&listen_id->id, ib_event); | |
895 | if (!conn_id) { | |
896 | ret = -ENOMEM; | |
897 | goto out; | |
898 | } | |
899 | ||
900 | atomic_inc(&conn_id->dev_remove); | |
901 | ret = cma_acquire_ib_dev(conn_id); | |
902 | if (ret) { | |
903 | ret = -ENODEV; | |
904 | cma_release_remove(conn_id); | |
905 | rdma_destroy_id(&conn_id->id); | |
906 | goto out; | |
907 | } | |
908 | ||
909 | conn_id->cm_id.ib = cm_id; | |
910 | cm_id->context = conn_id; | |
911 | cm_id->cm_handler = cma_ib_handler; | |
912 | ||
913 | offset = cma_user_data_offset(listen_id->id.ps); | |
914 | ret = cma_notify_user(conn_id, RDMA_CM_EVENT_CONNECT_REQUEST, 0, | |
915 | ib_event->private_data + offset, | |
916 | IB_CM_REQ_PRIVATE_DATA_SIZE - offset); | |
917 | if (ret) { | |
918 | /* Destroy the CM ID by returning a non-zero value. */ | |
919 | conn_id->cm_id.ib = NULL; | |
920 | cma_exch(conn_id, CMA_DESTROYING); | |
921 | cma_release_remove(conn_id); | |
922 | rdma_destroy_id(&conn_id->id); | |
923 | } | |
924 | out: | |
925 | cma_release_remove(listen_id); | |
926 | return ret; | |
927 | } | |
928 | ||
929 | static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr) | |
930 | { | |
931 | return cpu_to_be64(((u64)ps << 16) + | |
932 | be16_to_cpu(((struct sockaddr_in *) addr)->sin_port)); | |
933 | } | |
934 | ||
935 | static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr, | |
936 | struct ib_cm_compare_data *compare) | |
937 | { | |
938 | struct cma_hdr *cma_data, *cma_mask; | |
939 | struct sdp_hh *sdp_data, *sdp_mask; | |
940 | __u32 ip4_addr; | |
941 | struct in6_addr ip6_addr; | |
942 | ||
943 | memset(compare, 0, sizeof *compare); | |
944 | cma_data = (void *) compare->data; | |
945 | cma_mask = (void *) compare->mask; | |
946 | sdp_data = (void *) compare->data; | |
947 | sdp_mask = (void *) compare->mask; | |
948 | ||
949 | switch (addr->sa_family) { | |
950 | case AF_INET: | |
951 | ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr; | |
952 | if (ps == RDMA_PS_SDP) { | |
953 | sdp_set_ip_ver(sdp_data, 4); | |
954 | sdp_set_ip_ver(sdp_mask, 0xF); | |
955 | sdp_data->dst_addr.ip4.addr = ip4_addr; | |
956 | sdp_mask->dst_addr.ip4.addr = ~0; | |
957 | } else { | |
958 | cma_set_ip_ver(cma_data, 4); | |
959 | cma_set_ip_ver(cma_mask, 0xF); | |
960 | cma_data->dst_addr.ip4.addr = ip4_addr; | |
961 | cma_mask->dst_addr.ip4.addr = ~0; | |
962 | } | |
963 | break; | |
964 | case AF_INET6: | |
965 | ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr; | |
966 | if (ps == RDMA_PS_SDP) { | |
967 | sdp_set_ip_ver(sdp_data, 6); | |
968 | sdp_set_ip_ver(sdp_mask, 0xF); | |
969 | sdp_data->dst_addr.ip6 = ip6_addr; | |
970 | memset(&sdp_mask->dst_addr.ip6, 0xFF, | |
971 | sizeof sdp_mask->dst_addr.ip6); | |
972 | } else { | |
973 | cma_set_ip_ver(cma_data, 6); | |
974 | cma_set_ip_ver(cma_mask, 0xF); | |
975 | cma_data->dst_addr.ip6 = ip6_addr; | |
976 | memset(&cma_mask->dst_addr.ip6, 0xFF, | |
977 | sizeof cma_mask->dst_addr.ip6); | |
978 | } | |
979 | break; | |
980 | default: | |
981 | break; | |
982 | } | |
983 | } | |
984 | ||
985 | static int cma_ib_listen(struct rdma_id_private *id_priv) | |
986 | { | |
987 | struct ib_cm_compare_data compare_data; | |
988 | struct sockaddr *addr; | |
989 | __be64 svc_id; | |
990 | int ret; | |
991 | ||
992 | id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_req_handler, | |
993 | id_priv); | |
994 | if (IS_ERR(id_priv->cm_id.ib)) | |
995 | return PTR_ERR(id_priv->cm_id.ib); | |
996 | ||
997 | addr = &id_priv->id.route.addr.src_addr; | |
998 | svc_id = cma_get_service_id(id_priv->id.ps, addr); | |
999 | if (cma_any_addr(addr)) | |
1000 | ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL); | |
1001 | else { | |
1002 | cma_set_compare_data(id_priv->id.ps, addr, &compare_data); | |
1003 | ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data); | |
1004 | } | |
1005 | ||
1006 | if (ret) { | |
1007 | ib_destroy_cm_id(id_priv->cm_id.ib); | |
1008 | id_priv->cm_id.ib = NULL; | |
1009 | } | |
1010 | ||
1011 | return ret; | |
1012 | } | |
1013 | ||
1014 | static int cma_listen_handler(struct rdma_cm_id *id, | |
1015 | struct rdma_cm_event *event) | |
1016 | { | |
1017 | struct rdma_id_private *id_priv = id->context; | |
1018 | ||
1019 | id->context = id_priv->id.context; | |
1020 | id->event_handler = id_priv->id.event_handler; | |
1021 | return id_priv->id.event_handler(id, event); | |
1022 | } | |
1023 | ||
1024 | static void cma_listen_on_dev(struct rdma_id_private *id_priv, | |
1025 | struct cma_device *cma_dev) | |
1026 | { | |
1027 | struct rdma_id_private *dev_id_priv; | |
1028 | struct rdma_cm_id *id; | |
1029 | int ret; | |
1030 | ||
1031 | id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps); | |
1032 | if (IS_ERR(id)) | |
1033 | return; | |
1034 | ||
1035 | dev_id_priv = container_of(id, struct rdma_id_private, id); | |
1036 | ||
1037 | dev_id_priv->state = CMA_ADDR_BOUND; | |
1038 | memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr, | |
1039 | ip_addr_size(&id_priv->id.route.addr.src_addr)); | |
1040 | ||
1041 | cma_attach_to_dev(dev_id_priv, cma_dev); | |
1042 | list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list); | |
1043 | ||
1044 | ret = rdma_listen(id, id_priv->backlog); | |
1045 | if (ret) | |
1046 | goto err; | |
1047 | ||
1048 | return; | |
1049 | err: | |
1050 | cma_destroy_listen(dev_id_priv); | |
1051 | } | |
1052 | ||
1053 | static void cma_listen_on_all(struct rdma_id_private *id_priv) | |
1054 | { | |
1055 | struct cma_device *cma_dev; | |
1056 | ||
1057 | mutex_lock(&lock); | |
1058 | list_add_tail(&id_priv->list, &listen_any_list); | |
1059 | list_for_each_entry(cma_dev, &dev_list, list) | |
1060 | cma_listen_on_dev(id_priv, cma_dev); | |
1061 | mutex_unlock(&lock); | |
1062 | } | |
1063 | ||
1064 | static int cma_bind_any(struct rdma_cm_id *id, sa_family_t af) | |
1065 | { | |
1066 | struct sockaddr_in addr_in; | |
1067 | ||
1068 | memset(&addr_in, 0, sizeof addr_in); | |
1069 | addr_in.sin_family = af; | |
1070 | return rdma_bind_addr(id, (struct sockaddr *) &addr_in); | |
1071 | } | |
1072 | ||
1073 | int rdma_listen(struct rdma_cm_id *id, int backlog) | |
1074 | { | |
1075 | struct rdma_id_private *id_priv; | |
1076 | int ret; | |
1077 | ||
1078 | id_priv = container_of(id, struct rdma_id_private, id); | |
1079 | if (id_priv->state == CMA_IDLE) { | |
1080 | ret = cma_bind_any(id, AF_INET); | |
1081 | if (ret) | |
1082 | return ret; | |
1083 | } | |
1084 | ||
1085 | if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_LISTEN)) | |
1086 | return -EINVAL; | |
1087 | ||
1088 | id_priv->backlog = backlog; | |
1089 | if (id->device) { | |
1090 | switch (id->device->node_type) { | |
1091 | case IB_NODE_CA: | |
1092 | ret = cma_ib_listen(id_priv); | |
1093 | if (ret) | |
1094 | goto err; | |
1095 | break; | |
1096 | default: | |
1097 | ret = -ENOSYS; | |
1098 | goto err; | |
1099 | } | |
1100 | } else | |
1101 | cma_listen_on_all(id_priv); | |
1102 | ||
1103 | return 0; | |
1104 | err: | |
1105 | id_priv->backlog = 0; | |
1106 | cma_comp_exch(id_priv, CMA_LISTEN, CMA_ADDR_BOUND); | |
1107 | return ret; | |
1108 | } | |
1109 | EXPORT_SYMBOL(rdma_listen); | |
1110 | ||
1111 | static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec, | |
1112 | void *context) | |
1113 | { | |
1114 | struct cma_work *work = context; | |
1115 | struct rdma_route *route; | |
1116 | ||
1117 | route = &work->id->id.route; | |
1118 | ||
1119 | if (!status) { | |
1120 | route->num_paths = 1; | |
1121 | *route->path_rec = *path_rec; | |
1122 | } else { | |
1123 | work->old_state = CMA_ROUTE_QUERY; | |
1124 | work->new_state = CMA_ADDR_RESOLVED; | |
1125 | work->event.event = RDMA_CM_EVENT_ROUTE_ERROR; | |
1126 | } | |
1127 | ||
1128 | queue_work(cma_wq, &work->work); | |
1129 | } | |
1130 | ||
1131 | static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms, | |
1132 | struct cma_work *work) | |
1133 | { | |
1134 | struct rdma_dev_addr *addr = &id_priv->id.route.addr.dev_addr; | |
1135 | struct ib_sa_path_rec path_rec; | |
1136 | ||
1137 | memset(&path_rec, 0, sizeof path_rec); | |
f0ee3404 MT |
1138 | ib_addr_get_sgid(addr, &path_rec.sgid); |
1139 | ib_addr_get_dgid(addr, &path_rec.dgid); | |
e51060f0 SH |
1140 | path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(addr)); |
1141 | path_rec.numb_path = 1; | |
1142 | ||
1143 | id_priv->query_id = ib_sa_path_rec_get(id_priv->id.device, | |
1144 | id_priv->id.port_num, &path_rec, | |
1145 | IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID | | |
1146 | IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH, | |
1147 | timeout_ms, GFP_KERNEL, | |
1148 | cma_query_handler, work, &id_priv->query); | |
1149 | ||
1150 | return (id_priv->query_id < 0) ? id_priv->query_id : 0; | |
1151 | } | |
1152 | ||
1153 | static void cma_work_handler(void *data) | |
1154 | { | |
1155 | struct cma_work *work = data; | |
1156 | struct rdma_id_private *id_priv = work->id; | |
1157 | int destroy = 0; | |
1158 | ||
1159 | atomic_inc(&id_priv->dev_remove); | |
1160 | if (!cma_comp_exch(id_priv, work->old_state, work->new_state)) | |
1161 | goto out; | |
1162 | ||
1163 | if (id_priv->id.event_handler(&id_priv->id, &work->event)) { | |
1164 | cma_exch(id_priv, CMA_DESTROYING); | |
1165 | destroy = 1; | |
1166 | } | |
1167 | out: | |
1168 | cma_release_remove(id_priv); | |
1169 | cma_deref_id(id_priv); | |
1170 | if (destroy) | |
1171 | rdma_destroy_id(&id_priv->id); | |
1172 | kfree(work); | |
1173 | } | |
1174 | ||
1175 | static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms) | |
1176 | { | |
1177 | struct rdma_route *route = &id_priv->id.route; | |
1178 | struct cma_work *work; | |
1179 | int ret; | |
1180 | ||
1181 | work = kzalloc(sizeof *work, GFP_KERNEL); | |
1182 | if (!work) | |
1183 | return -ENOMEM; | |
1184 | ||
1185 | work->id = id_priv; | |
1186 | INIT_WORK(&work->work, cma_work_handler, work); | |
1187 | work->old_state = CMA_ROUTE_QUERY; | |
1188 | work->new_state = CMA_ROUTE_RESOLVED; | |
1189 | work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; | |
1190 | ||
1191 | route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL); | |
1192 | if (!route->path_rec) { | |
1193 | ret = -ENOMEM; | |
1194 | goto err1; | |
1195 | } | |
1196 | ||
1197 | ret = cma_query_ib_route(id_priv, timeout_ms, work); | |
1198 | if (ret) | |
1199 | goto err2; | |
1200 | ||
1201 | return 0; | |
1202 | err2: | |
1203 | kfree(route->path_rec); | |
1204 | route->path_rec = NULL; | |
1205 | err1: | |
1206 | kfree(work); | |
1207 | return ret; | |
1208 | } | |
1209 | ||
1210 | int rdma_set_ib_paths(struct rdma_cm_id *id, | |
1211 | struct ib_sa_path_rec *path_rec, int num_paths) | |
1212 | { | |
1213 | struct rdma_id_private *id_priv; | |
1214 | int ret; | |
1215 | ||
1216 | id_priv = container_of(id, struct rdma_id_private, id); | |
1217 | if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_RESOLVED)) | |
1218 | return -EINVAL; | |
1219 | ||
1220 | id->route.path_rec = kmalloc(sizeof *path_rec * num_paths, GFP_KERNEL); | |
1221 | if (!id->route.path_rec) { | |
1222 | ret = -ENOMEM; | |
1223 | goto err; | |
1224 | } | |
1225 | ||
1226 | memcpy(id->route.path_rec, path_rec, sizeof *path_rec * num_paths); | |
1227 | return 0; | |
1228 | err: | |
1229 | cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_ADDR_RESOLVED); | |
1230 | return ret; | |
1231 | } | |
1232 | EXPORT_SYMBOL(rdma_set_ib_paths); | |
1233 | ||
1234 | int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms) | |
1235 | { | |
1236 | struct rdma_id_private *id_priv; | |
1237 | int ret; | |
1238 | ||
1239 | id_priv = container_of(id, struct rdma_id_private, id); | |
1240 | if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_QUERY)) | |
1241 | return -EINVAL; | |
1242 | ||
1243 | atomic_inc(&id_priv->refcount); | |
1244 | switch (id->device->node_type) { | |
1245 | case IB_NODE_CA: | |
1246 | ret = cma_resolve_ib_route(id_priv, timeout_ms); | |
1247 | break; | |
1248 | default: | |
1249 | ret = -ENOSYS; | |
1250 | break; | |
1251 | } | |
1252 | if (ret) | |
1253 | goto err; | |
1254 | ||
1255 | return 0; | |
1256 | err: | |
1257 | cma_comp_exch(id_priv, CMA_ROUTE_QUERY, CMA_ADDR_RESOLVED); | |
1258 | cma_deref_id(id_priv); | |
1259 | return ret; | |
1260 | } | |
1261 | EXPORT_SYMBOL(rdma_resolve_route); | |
1262 | ||
1263 | static int cma_bind_loopback(struct rdma_id_private *id_priv) | |
1264 | { | |
1265 | struct cma_device *cma_dev; | |
1266 | struct ib_port_attr port_attr; | |
f0ee3404 | 1267 | union ib_gid gid; |
e51060f0 SH |
1268 | u16 pkey; |
1269 | int ret; | |
1270 | u8 p; | |
1271 | ||
1272 | mutex_lock(&lock); | |
1273 | list_for_each_entry(cma_dev, &dev_list, list) | |
1274 | for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p) | |
1275 | if (!ib_query_port (cma_dev->device, p, &port_attr) && | |
1276 | port_attr.state == IB_PORT_ACTIVE) | |
1277 | goto port_found; | |
1278 | ||
1279 | if (!list_empty(&dev_list)) { | |
1280 | p = 1; | |
1281 | cma_dev = list_entry(dev_list.next, struct cma_device, list); | |
1282 | } else { | |
1283 | ret = -ENODEV; | |
1284 | goto out; | |
1285 | } | |
1286 | ||
1287 | port_found: | |
f0ee3404 | 1288 | ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid); |
e51060f0 SH |
1289 | if (ret) |
1290 | goto out; | |
1291 | ||
1292 | ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey); | |
1293 | if (ret) | |
1294 | goto out; | |
1295 | ||
f0ee3404 | 1296 | ib_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid); |
e51060f0 SH |
1297 | ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey); |
1298 | id_priv->id.port_num = p; | |
1299 | cma_attach_to_dev(id_priv, cma_dev); | |
1300 | out: | |
1301 | mutex_unlock(&lock); | |
1302 | return ret; | |
1303 | } | |
1304 | ||
1305 | static void addr_handler(int status, struct sockaddr *src_addr, | |
1306 | struct rdma_dev_addr *dev_addr, void *context) | |
1307 | { | |
1308 | struct rdma_id_private *id_priv = context; | |
1309 | enum rdma_cm_event_type event; | |
1310 | ||
1311 | atomic_inc(&id_priv->dev_remove); | |
1312 | if (!id_priv->cma_dev && !status) | |
1313 | status = cma_acquire_dev(id_priv); | |
1314 | ||
1315 | if (status) { | |
1316 | if (!cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_BOUND)) | |
1317 | goto out; | |
1318 | event = RDMA_CM_EVENT_ADDR_ERROR; | |
1319 | } else { | |
1320 | if (!cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_RESOLVED)) | |
1321 | goto out; | |
1322 | memcpy(&id_priv->id.route.addr.src_addr, src_addr, | |
1323 | ip_addr_size(src_addr)); | |
1324 | event = RDMA_CM_EVENT_ADDR_RESOLVED; | |
1325 | } | |
1326 | ||
1327 | if (cma_notify_user(id_priv, event, status, NULL, 0)) { | |
1328 | cma_exch(id_priv, CMA_DESTROYING); | |
1329 | cma_release_remove(id_priv); | |
1330 | cma_deref_id(id_priv); | |
1331 | rdma_destroy_id(&id_priv->id); | |
1332 | return; | |
1333 | } | |
1334 | out: | |
1335 | cma_release_remove(id_priv); | |
1336 | cma_deref_id(id_priv); | |
1337 | } | |
1338 | ||
1339 | static int cma_resolve_loopback(struct rdma_id_private *id_priv) | |
1340 | { | |
1341 | struct cma_work *work; | |
1342 | struct sockaddr_in *src_in, *dst_in; | |
f0ee3404 | 1343 | union ib_gid gid; |
e51060f0 SH |
1344 | int ret; |
1345 | ||
1346 | work = kzalloc(sizeof *work, GFP_KERNEL); | |
1347 | if (!work) | |
1348 | return -ENOMEM; | |
1349 | ||
1350 | if (!id_priv->cma_dev) { | |
1351 | ret = cma_bind_loopback(id_priv); | |
1352 | if (ret) | |
1353 | goto err; | |
1354 | } | |
1355 | ||
f0ee3404 MT |
1356 | ib_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid); |
1357 | ib_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid); | |
e51060f0 SH |
1358 | |
1359 | if (cma_zero_addr(&id_priv->id.route.addr.src_addr)) { | |
1360 | src_in = (struct sockaddr_in *)&id_priv->id.route.addr.src_addr; | |
1361 | dst_in = (struct sockaddr_in *)&id_priv->id.route.addr.dst_addr; | |
1362 | src_in->sin_family = dst_in->sin_family; | |
1363 | src_in->sin_addr.s_addr = dst_in->sin_addr.s_addr; | |
1364 | } | |
1365 | ||
1366 | work->id = id_priv; | |
1367 | INIT_WORK(&work->work, cma_work_handler, work); | |
1368 | work->old_state = CMA_ADDR_QUERY; | |
1369 | work->new_state = CMA_ADDR_RESOLVED; | |
1370 | work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED; | |
1371 | queue_work(cma_wq, &work->work); | |
1372 | return 0; | |
1373 | err: | |
1374 | kfree(work); | |
1375 | return ret; | |
1376 | } | |
1377 | ||
1378 | static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, | |
1379 | struct sockaddr *dst_addr) | |
1380 | { | |
1381 | if (src_addr && src_addr->sa_family) | |
1382 | return rdma_bind_addr(id, src_addr); | |
1383 | else | |
1384 | return cma_bind_any(id, dst_addr->sa_family); | |
1385 | } | |
1386 | ||
1387 | int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, | |
1388 | struct sockaddr *dst_addr, int timeout_ms) | |
1389 | { | |
1390 | struct rdma_id_private *id_priv; | |
1391 | int ret; | |
1392 | ||
1393 | id_priv = container_of(id, struct rdma_id_private, id); | |
1394 | if (id_priv->state == CMA_IDLE) { | |
1395 | ret = cma_bind_addr(id, src_addr, dst_addr); | |
1396 | if (ret) | |
1397 | return ret; | |
1398 | } | |
1399 | ||
1400 | if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_ADDR_QUERY)) | |
1401 | return -EINVAL; | |
1402 | ||
1403 | atomic_inc(&id_priv->refcount); | |
1404 | memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr)); | |
1405 | if (cma_any_addr(dst_addr)) | |
1406 | ret = cma_resolve_loopback(id_priv); | |
1407 | else | |
1408 | ret = rdma_resolve_ip(&id->route.addr.src_addr, dst_addr, | |
1409 | &id->route.addr.dev_addr, | |
1410 | timeout_ms, addr_handler, id_priv); | |
1411 | if (ret) | |
1412 | goto err; | |
1413 | ||
1414 | return 0; | |
1415 | err: | |
1416 | cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_BOUND); | |
1417 | cma_deref_id(id_priv); | |
1418 | return ret; | |
1419 | } | |
1420 | EXPORT_SYMBOL(rdma_resolve_addr); | |
1421 | ||
1422 | static void cma_bind_port(struct rdma_bind_list *bind_list, | |
1423 | struct rdma_id_private *id_priv) | |
1424 | { | |
1425 | struct sockaddr_in *sin; | |
1426 | ||
1427 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; | |
1428 | sin->sin_port = htons(bind_list->port); | |
1429 | id_priv->bind_list = bind_list; | |
1430 | hlist_add_head(&id_priv->node, &bind_list->owners); | |
1431 | } | |
1432 | ||
1433 | static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv, | |
1434 | unsigned short snum) | |
1435 | { | |
1436 | struct rdma_bind_list *bind_list; | |
1437 | int port, start, ret; | |
1438 | ||
1439 | bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL); | |
1440 | if (!bind_list) | |
1441 | return -ENOMEM; | |
1442 | ||
1443 | start = snum ? snum : sysctl_local_port_range[0]; | |
1444 | ||
1445 | do { | |
1446 | ret = idr_get_new_above(ps, bind_list, start, &port); | |
1447 | } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL)); | |
1448 | ||
1449 | if (ret) | |
1450 | goto err; | |
1451 | ||
1452 | if ((snum && port != snum) || | |
1453 | (!snum && port > sysctl_local_port_range[1])) { | |
1454 | idr_remove(ps, port); | |
1455 | ret = -EADDRNOTAVAIL; | |
1456 | goto err; | |
1457 | } | |
1458 | ||
1459 | bind_list->ps = ps; | |
1460 | bind_list->port = (unsigned short) port; | |
1461 | cma_bind_port(bind_list, id_priv); | |
1462 | return 0; | |
1463 | err: | |
1464 | kfree(bind_list); | |
1465 | return ret; | |
1466 | } | |
1467 | ||
1468 | static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv) | |
1469 | { | |
1470 | struct rdma_id_private *cur_id; | |
1471 | struct sockaddr_in *sin, *cur_sin; | |
1472 | struct rdma_bind_list *bind_list; | |
1473 | struct hlist_node *node; | |
1474 | unsigned short snum; | |
1475 | ||
1476 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; | |
1477 | snum = ntohs(sin->sin_port); | |
1478 | if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) | |
1479 | return -EACCES; | |
1480 | ||
1481 | bind_list = idr_find(ps, snum); | |
1482 | if (!bind_list) | |
1483 | return cma_alloc_port(ps, id_priv, snum); | |
1484 | ||
1485 | /* | |
1486 | * We don't support binding to any address if anyone is bound to | |
1487 | * a specific address on the same port. | |
1488 | */ | |
1489 | if (cma_any_addr(&id_priv->id.route.addr.src_addr)) | |
1490 | return -EADDRNOTAVAIL; | |
1491 | ||
1492 | hlist_for_each_entry(cur_id, node, &bind_list->owners, node) { | |
1493 | if (cma_any_addr(&cur_id->id.route.addr.src_addr)) | |
1494 | return -EADDRNOTAVAIL; | |
1495 | ||
1496 | cur_sin = (struct sockaddr_in *) &cur_id->id.route.addr.src_addr; | |
1497 | if (sin->sin_addr.s_addr == cur_sin->sin_addr.s_addr) | |
1498 | return -EADDRINUSE; | |
1499 | } | |
1500 | ||
1501 | cma_bind_port(bind_list, id_priv); | |
1502 | return 0; | |
1503 | } | |
1504 | ||
1505 | static int cma_get_port(struct rdma_id_private *id_priv) | |
1506 | { | |
1507 | struct idr *ps; | |
1508 | int ret; | |
1509 | ||
1510 | switch (id_priv->id.ps) { | |
1511 | case RDMA_PS_SDP: | |
1512 | ps = &sdp_ps; | |
1513 | break; | |
1514 | case RDMA_PS_TCP: | |
1515 | ps = &tcp_ps; | |
1516 | break; | |
1517 | default: | |
1518 | return -EPROTONOSUPPORT; | |
1519 | } | |
1520 | ||
1521 | mutex_lock(&lock); | |
1522 | if (cma_any_port(&id_priv->id.route.addr.src_addr)) | |
1523 | ret = cma_alloc_port(ps, id_priv, 0); | |
1524 | else | |
1525 | ret = cma_use_port(ps, id_priv); | |
1526 | mutex_unlock(&lock); | |
1527 | ||
1528 | return ret; | |
1529 | } | |
1530 | ||
1531 | int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr) | |
1532 | { | |
1533 | struct rdma_id_private *id_priv; | |
1534 | int ret; | |
1535 | ||
1536 | if (addr->sa_family != AF_INET) | |
1537 | return -EAFNOSUPPORT; | |
1538 | ||
1539 | id_priv = container_of(id, struct rdma_id_private, id); | |
1540 | if (!cma_comp_exch(id_priv, CMA_IDLE, CMA_ADDR_BOUND)) | |
1541 | return -EINVAL; | |
1542 | ||
1543 | if (!cma_any_addr(addr)) { | |
1544 | ret = rdma_translate_ip(addr, &id->route.addr.dev_addr); | |
1545 | if (!ret) | |
1546 | ret = cma_acquire_dev(id_priv); | |
1547 | if (ret) | |
1548 | goto err; | |
1549 | } | |
1550 | ||
1551 | memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr)); | |
1552 | ret = cma_get_port(id_priv); | |
1553 | if (ret) | |
1554 | goto err; | |
1555 | ||
1556 | return 0; | |
1557 | err: | |
1558 | cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_IDLE); | |
1559 | return ret; | |
1560 | } | |
1561 | EXPORT_SYMBOL(rdma_bind_addr); | |
1562 | ||
1563 | static int cma_format_hdr(void *hdr, enum rdma_port_space ps, | |
1564 | struct rdma_route *route) | |
1565 | { | |
1566 | struct sockaddr_in *src4, *dst4; | |
1567 | struct cma_hdr *cma_hdr; | |
1568 | struct sdp_hh *sdp_hdr; | |
1569 | ||
1570 | src4 = (struct sockaddr_in *) &route->addr.src_addr; | |
1571 | dst4 = (struct sockaddr_in *) &route->addr.dst_addr; | |
1572 | ||
1573 | switch (ps) { | |
1574 | case RDMA_PS_SDP: | |
1575 | sdp_hdr = hdr; | |
1576 | if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION) | |
1577 | return -EINVAL; | |
1578 | sdp_set_ip_ver(sdp_hdr, 4); | |
1579 | sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; | |
1580 | sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; | |
1581 | sdp_hdr->port = src4->sin_port; | |
1582 | break; | |
1583 | default: | |
1584 | cma_hdr = hdr; | |
1585 | cma_hdr->cma_version = CMA_VERSION; | |
1586 | cma_set_ip_ver(cma_hdr, 4); | |
1587 | cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; | |
1588 | cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; | |
1589 | cma_hdr->port = src4->sin_port; | |
1590 | break; | |
1591 | } | |
1592 | return 0; | |
1593 | } | |
1594 | ||
1595 | static int cma_connect_ib(struct rdma_id_private *id_priv, | |
1596 | struct rdma_conn_param *conn_param) | |
1597 | { | |
1598 | struct ib_cm_req_param req; | |
1599 | struct rdma_route *route; | |
1600 | void *private_data; | |
1601 | int offset, ret; | |
1602 | ||
1603 | memset(&req, 0, sizeof req); | |
1604 | offset = cma_user_data_offset(id_priv->id.ps); | |
1605 | req.private_data_len = offset + conn_param->private_data_len; | |
1606 | private_data = kzalloc(req.private_data_len, GFP_ATOMIC); | |
1607 | if (!private_data) | |
1608 | return -ENOMEM; | |
1609 | ||
1610 | if (conn_param->private_data && conn_param->private_data_len) | |
1611 | memcpy(private_data + offset, conn_param->private_data, | |
1612 | conn_param->private_data_len); | |
1613 | ||
1614 | id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_ib_handler, | |
1615 | id_priv); | |
1616 | if (IS_ERR(id_priv->cm_id.ib)) { | |
1617 | ret = PTR_ERR(id_priv->cm_id.ib); | |
1618 | goto out; | |
1619 | } | |
1620 | ||
1621 | route = &id_priv->id.route; | |
1622 | ret = cma_format_hdr(private_data, id_priv->id.ps, route); | |
1623 | if (ret) | |
1624 | goto out; | |
1625 | req.private_data = private_data; | |
1626 | ||
1627 | req.primary_path = &route->path_rec[0]; | |
1628 | if (route->num_paths == 2) | |
1629 | req.alternate_path = &route->path_rec[1]; | |
1630 | ||
1631 | req.service_id = cma_get_service_id(id_priv->id.ps, | |
1632 | &route->addr.dst_addr); | |
1633 | req.qp_num = id_priv->qp_num; | |
1634 | req.qp_type = id_priv->qp_type; | |
1635 | req.starting_psn = id_priv->seq_num; | |
1636 | req.responder_resources = conn_param->responder_resources; | |
1637 | req.initiator_depth = conn_param->initiator_depth; | |
1638 | req.flow_control = conn_param->flow_control; | |
1639 | req.retry_count = conn_param->retry_count; | |
1640 | req.rnr_retry_count = conn_param->rnr_retry_count; | |
1641 | req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; | |
1642 | req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; | |
1643 | req.max_cm_retries = CMA_MAX_CM_RETRIES; | |
1644 | req.srq = id_priv->srq ? 1 : 0; | |
1645 | ||
1646 | ret = ib_send_cm_req(id_priv->cm_id.ib, &req); | |
1647 | out: | |
1648 | kfree(private_data); | |
1649 | return ret; | |
1650 | } | |
1651 | ||
1652 | int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) | |
1653 | { | |
1654 | struct rdma_id_private *id_priv; | |
1655 | int ret; | |
1656 | ||
1657 | id_priv = container_of(id, struct rdma_id_private, id); | |
1658 | if (!cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_CONNECT)) | |
1659 | return -EINVAL; | |
1660 | ||
1661 | if (!id->qp) { | |
1662 | id_priv->qp_num = conn_param->qp_num; | |
1663 | id_priv->qp_type = conn_param->qp_type; | |
1664 | id_priv->srq = conn_param->srq; | |
1665 | } | |
1666 | ||
1667 | switch (id->device->node_type) { | |
1668 | case IB_NODE_CA: | |
1669 | ret = cma_connect_ib(id_priv, conn_param); | |
1670 | break; | |
1671 | default: | |
1672 | ret = -ENOSYS; | |
1673 | break; | |
1674 | } | |
1675 | if (ret) | |
1676 | goto err; | |
1677 | ||
1678 | return 0; | |
1679 | err: | |
1680 | cma_comp_exch(id_priv, CMA_CONNECT, CMA_ROUTE_RESOLVED); | |
1681 | return ret; | |
1682 | } | |
1683 | EXPORT_SYMBOL(rdma_connect); | |
1684 | ||
1685 | static int cma_accept_ib(struct rdma_id_private *id_priv, | |
1686 | struct rdma_conn_param *conn_param) | |
1687 | { | |
1688 | struct ib_cm_rep_param rep; | |
1689 | int ret; | |
1690 | ||
1691 | ret = cma_modify_qp_rtr(&id_priv->id); | |
1692 | if (ret) | |
1693 | return ret; | |
1694 | ||
1695 | memset(&rep, 0, sizeof rep); | |
1696 | rep.qp_num = id_priv->qp_num; | |
1697 | rep.starting_psn = id_priv->seq_num; | |
1698 | rep.private_data = conn_param->private_data; | |
1699 | rep.private_data_len = conn_param->private_data_len; | |
1700 | rep.responder_resources = conn_param->responder_resources; | |
1701 | rep.initiator_depth = conn_param->initiator_depth; | |
1702 | rep.target_ack_delay = CMA_CM_RESPONSE_TIMEOUT; | |
1703 | rep.failover_accepted = 0; | |
1704 | rep.flow_control = conn_param->flow_control; | |
1705 | rep.rnr_retry_count = conn_param->rnr_retry_count; | |
1706 | rep.srq = id_priv->srq ? 1 : 0; | |
1707 | ||
1708 | return ib_send_cm_rep(id_priv->cm_id.ib, &rep); | |
1709 | } | |
1710 | ||
1711 | int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) | |
1712 | { | |
1713 | struct rdma_id_private *id_priv; | |
1714 | int ret; | |
1715 | ||
1716 | id_priv = container_of(id, struct rdma_id_private, id); | |
1717 | if (!cma_comp(id_priv, CMA_CONNECT)) | |
1718 | return -EINVAL; | |
1719 | ||
1720 | if (!id->qp && conn_param) { | |
1721 | id_priv->qp_num = conn_param->qp_num; | |
1722 | id_priv->qp_type = conn_param->qp_type; | |
1723 | id_priv->srq = conn_param->srq; | |
1724 | } | |
1725 | ||
1726 | switch (id->device->node_type) { | |
1727 | case IB_NODE_CA: | |
1728 | if (conn_param) | |
1729 | ret = cma_accept_ib(id_priv, conn_param); | |
1730 | else | |
1731 | ret = cma_rep_recv(id_priv); | |
1732 | break; | |
1733 | default: | |
1734 | ret = -ENOSYS; | |
1735 | break; | |
1736 | } | |
1737 | ||
1738 | if (ret) | |
1739 | goto reject; | |
1740 | ||
1741 | return 0; | |
1742 | reject: | |
1743 | cma_modify_qp_err(id); | |
1744 | rdma_reject(id, NULL, 0); | |
1745 | return ret; | |
1746 | } | |
1747 | EXPORT_SYMBOL(rdma_accept); | |
1748 | ||
1749 | int rdma_reject(struct rdma_cm_id *id, const void *private_data, | |
1750 | u8 private_data_len) | |
1751 | { | |
1752 | struct rdma_id_private *id_priv; | |
1753 | int ret; | |
1754 | ||
1755 | id_priv = container_of(id, struct rdma_id_private, id); | |
1756 | if (!cma_comp(id_priv, CMA_CONNECT)) | |
1757 | return -EINVAL; | |
1758 | ||
1759 | switch (id->device->node_type) { | |
1760 | case IB_NODE_CA: | |
1761 | ret = ib_send_cm_rej(id_priv->cm_id.ib, | |
1762 | IB_CM_REJ_CONSUMER_DEFINED, NULL, 0, | |
1763 | private_data, private_data_len); | |
1764 | break; | |
1765 | default: | |
1766 | ret = -ENOSYS; | |
1767 | break; | |
1768 | } | |
1769 | return ret; | |
1770 | } | |
1771 | EXPORT_SYMBOL(rdma_reject); | |
1772 | ||
1773 | int rdma_disconnect(struct rdma_cm_id *id) | |
1774 | { | |
1775 | struct rdma_id_private *id_priv; | |
1776 | int ret; | |
1777 | ||
1778 | id_priv = container_of(id, struct rdma_id_private, id); | |
1779 | if (!cma_comp(id_priv, CMA_CONNECT) && | |
1780 | !cma_comp(id_priv, CMA_DISCONNECT)) | |
1781 | return -EINVAL; | |
1782 | ||
1783 | ret = cma_modify_qp_err(id); | |
1784 | if (ret) | |
1785 | goto out; | |
1786 | ||
1787 | switch (id->device->node_type) { | |
1788 | case IB_NODE_CA: | |
1789 | /* Initiate or respond to a disconnect. */ | |
1790 | if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0)) | |
1791 | ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0); | |
1792 | break; | |
1793 | default: | |
1794 | break; | |
1795 | } | |
1796 | out: | |
1797 | return ret; | |
1798 | } | |
1799 | EXPORT_SYMBOL(rdma_disconnect); | |
1800 | ||
1801 | static void cma_add_one(struct ib_device *device) | |
1802 | { | |
1803 | struct cma_device *cma_dev; | |
1804 | struct rdma_id_private *id_priv; | |
1805 | ||
1806 | cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL); | |
1807 | if (!cma_dev) | |
1808 | return; | |
1809 | ||
1810 | cma_dev->device = device; | |
1811 | cma_dev->node_guid = device->node_guid; | |
1812 | if (!cma_dev->node_guid) | |
1813 | goto err; | |
1814 | ||
1815 | init_completion(&cma_dev->comp); | |
1816 | atomic_set(&cma_dev->refcount, 1); | |
1817 | INIT_LIST_HEAD(&cma_dev->id_list); | |
1818 | ib_set_client_data(device, &cma_client, cma_dev); | |
1819 | ||
1820 | mutex_lock(&lock); | |
1821 | list_add_tail(&cma_dev->list, &dev_list); | |
1822 | list_for_each_entry(id_priv, &listen_any_list, list) | |
1823 | cma_listen_on_dev(id_priv, cma_dev); | |
1824 | mutex_unlock(&lock); | |
1825 | return; | |
1826 | err: | |
1827 | kfree(cma_dev); | |
1828 | } | |
1829 | ||
1830 | static int cma_remove_id_dev(struct rdma_id_private *id_priv) | |
1831 | { | |
1832 | enum cma_state state; | |
1833 | ||
1834 | /* Record that we want to remove the device */ | |
1835 | state = cma_exch(id_priv, CMA_DEVICE_REMOVAL); | |
1836 | if (state == CMA_DESTROYING) | |
1837 | return 0; | |
1838 | ||
1839 | cma_cancel_operation(id_priv, state); | |
1840 | wait_event(id_priv->wait_remove, !atomic_read(&id_priv->dev_remove)); | |
1841 | ||
1842 | /* Check for destruction from another callback. */ | |
1843 | if (!cma_comp(id_priv, CMA_DEVICE_REMOVAL)) | |
1844 | return 0; | |
1845 | ||
1846 | return cma_notify_user(id_priv, RDMA_CM_EVENT_DEVICE_REMOVAL, | |
1847 | 0, NULL, 0); | |
1848 | } | |
1849 | ||
1850 | static void cma_process_remove(struct cma_device *cma_dev) | |
1851 | { | |
1852 | struct list_head remove_list; | |
1853 | struct rdma_id_private *id_priv; | |
1854 | int ret; | |
1855 | ||
1856 | INIT_LIST_HEAD(&remove_list); | |
1857 | ||
1858 | mutex_lock(&lock); | |
1859 | while (!list_empty(&cma_dev->id_list)) { | |
1860 | id_priv = list_entry(cma_dev->id_list.next, | |
1861 | struct rdma_id_private, list); | |
1862 | ||
1863 | if (cma_internal_listen(id_priv)) { | |
1864 | cma_destroy_listen(id_priv); | |
1865 | continue; | |
1866 | } | |
1867 | ||
1868 | list_del(&id_priv->list); | |
1869 | list_add_tail(&id_priv->list, &remove_list); | |
1870 | atomic_inc(&id_priv->refcount); | |
1871 | mutex_unlock(&lock); | |
1872 | ||
1873 | ret = cma_remove_id_dev(id_priv); | |
1874 | cma_deref_id(id_priv); | |
1875 | if (ret) | |
1876 | rdma_destroy_id(&id_priv->id); | |
1877 | ||
1878 | mutex_lock(&lock); | |
1879 | } | |
1880 | mutex_unlock(&lock); | |
1881 | ||
1882 | cma_deref_dev(cma_dev); | |
1883 | wait_for_completion(&cma_dev->comp); | |
1884 | } | |
1885 | ||
1886 | static void cma_remove_one(struct ib_device *device) | |
1887 | { | |
1888 | struct cma_device *cma_dev; | |
1889 | ||
1890 | cma_dev = ib_get_client_data(device, &cma_client); | |
1891 | if (!cma_dev) | |
1892 | return; | |
1893 | ||
1894 | mutex_lock(&lock); | |
1895 | list_del(&cma_dev->list); | |
1896 | mutex_unlock(&lock); | |
1897 | ||
1898 | cma_process_remove(cma_dev); | |
1899 | kfree(cma_dev); | |
1900 | } | |
1901 | ||
1902 | static int cma_init(void) | |
1903 | { | |
1904 | int ret; | |
1905 | ||
1906 | cma_wq = create_singlethread_workqueue("rdma_cm_wq"); | |
1907 | if (!cma_wq) | |
1908 | return -ENOMEM; | |
1909 | ||
1910 | ret = ib_register_client(&cma_client); | |
1911 | if (ret) | |
1912 | goto err; | |
1913 | return 0; | |
1914 | ||
1915 | err: | |
1916 | destroy_workqueue(cma_wq); | |
1917 | return ret; | |
1918 | } | |
1919 | ||
1920 | static void cma_cleanup(void) | |
1921 | { | |
1922 | ib_unregister_client(&cma_client); | |
1923 | destroy_workqueue(cma_wq); | |
1924 | idr_destroy(&sdp_ps); | |
1925 | idr_destroy(&tcp_ps); | |
1926 | } | |
1927 | ||
1928 | module_init(cma_init); | |
1929 | module_exit(cma_cleanup); |