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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> | |
07ebafba | 38 | #include <linux/inetdevice.h> |
e51060f0 SH |
39 | |
40 | #include <net/tcp.h> | |
41 | ||
42 | #include <rdma/rdma_cm.h> | |
43 | #include <rdma/rdma_cm_ib.h> | |
44 | #include <rdma/ib_cache.h> | |
45 | #include <rdma/ib_cm.h> | |
46 | #include <rdma/ib_sa.h> | |
07ebafba | 47 | #include <rdma/iw_cm.h> |
e51060f0 SH |
48 | |
49 | MODULE_AUTHOR("Sean Hefty"); | |
50 | MODULE_DESCRIPTION("Generic RDMA CM Agent"); | |
51 | MODULE_LICENSE("Dual BSD/GPL"); | |
52 | ||
53 | #define CMA_CM_RESPONSE_TIMEOUT 20 | |
d5bb7599 | 54 | #define CMA_MAX_CM_RETRIES 15 |
e51060f0 SH |
55 | |
56 | static void cma_add_one(struct ib_device *device); | |
57 | static void cma_remove_one(struct ib_device *device); | |
58 | ||
59 | static struct ib_client cma_client = { | |
60 | .name = "cma", | |
61 | .add = cma_add_one, | |
62 | .remove = cma_remove_one | |
63 | }; | |
64 | ||
c1a0b23b | 65 | static struct ib_sa_client sa_client; |
7a118df3 | 66 | static struct rdma_addr_client addr_client; |
e51060f0 SH |
67 | static LIST_HEAD(dev_list); |
68 | static LIST_HEAD(listen_any_list); | |
69 | static DEFINE_MUTEX(lock); | |
70 | static struct workqueue_struct *cma_wq; | |
71 | static DEFINE_IDR(sdp_ps); | |
72 | static DEFINE_IDR(tcp_ps); | |
628e5f6d | 73 | static DEFINE_IDR(udp_ps); |
aedec080 | 74 | static int next_port; |
e51060f0 SH |
75 | |
76 | struct cma_device { | |
77 | struct list_head list; | |
78 | struct ib_device *device; | |
79 | __be64 node_guid; | |
80 | struct completion comp; | |
81 | atomic_t refcount; | |
82 | struct list_head id_list; | |
83 | }; | |
84 | ||
85 | enum cma_state { | |
86 | CMA_IDLE, | |
87 | CMA_ADDR_QUERY, | |
88 | CMA_ADDR_RESOLVED, | |
89 | CMA_ROUTE_QUERY, | |
90 | CMA_ROUTE_RESOLVED, | |
91 | CMA_CONNECT, | |
92 | CMA_DISCONNECT, | |
93 | CMA_ADDR_BOUND, | |
94 | CMA_LISTEN, | |
95 | CMA_DEVICE_REMOVAL, | |
96 | CMA_DESTROYING | |
97 | }; | |
98 | ||
99 | struct rdma_bind_list { | |
100 | struct idr *ps; | |
101 | struct hlist_head owners; | |
102 | unsigned short port; | |
103 | }; | |
104 | ||
105 | /* | |
106 | * Device removal can occur at anytime, so we need extra handling to | |
107 | * serialize notifying the user of device removal with other callbacks. | |
108 | * We do this by disabling removal notification while a callback is in process, | |
109 | * and reporting it after the callback completes. | |
110 | */ | |
111 | struct rdma_id_private { | |
112 | struct rdma_cm_id id; | |
113 | ||
114 | struct rdma_bind_list *bind_list; | |
115 | struct hlist_node node; | |
116 | struct list_head list; | |
117 | struct list_head listen_list; | |
118 | struct cma_device *cma_dev; | |
119 | ||
120 | enum cma_state state; | |
121 | spinlock_t lock; | |
122 | struct completion comp; | |
123 | atomic_t refcount; | |
124 | wait_queue_head_t wait_remove; | |
125 | atomic_t dev_remove; | |
126 | ||
127 | int backlog; | |
128 | int timeout_ms; | |
129 | struct ib_sa_query *query; | |
130 | int query_id; | |
131 | union { | |
132 | struct ib_cm_id *ib; | |
07ebafba | 133 | struct iw_cm_id *iw; |
e51060f0 SH |
134 | } cm_id; |
135 | ||
136 | u32 seq_num; | |
137 | u32 qp_num; | |
e51060f0 SH |
138 | u8 srq; |
139 | }; | |
140 | ||
141 | struct cma_work { | |
142 | struct work_struct work; | |
143 | struct rdma_id_private *id; | |
144 | enum cma_state old_state; | |
145 | enum cma_state new_state; | |
146 | struct rdma_cm_event event; | |
147 | }; | |
148 | ||
149 | union cma_ip_addr { | |
150 | struct in6_addr ip6; | |
151 | struct { | |
152 | __u32 pad[3]; | |
153 | __u32 addr; | |
154 | } ip4; | |
155 | }; | |
156 | ||
157 | struct cma_hdr { | |
158 | u8 cma_version; | |
159 | u8 ip_version; /* IP version: 7:4 */ | |
160 | __u16 port; | |
161 | union cma_ip_addr src_addr; | |
162 | union cma_ip_addr dst_addr; | |
163 | }; | |
164 | ||
165 | struct sdp_hh { | |
166 | u8 bsdh[16]; | |
167 | u8 sdp_version; /* Major version: 7:4 */ | |
168 | u8 ip_version; /* IP version: 7:4 */ | |
169 | u8 sdp_specific1[10]; | |
170 | __u16 port; | |
171 | __u16 sdp_specific2; | |
172 | union cma_ip_addr src_addr; | |
173 | union cma_ip_addr dst_addr; | |
174 | }; | |
175 | ||
176 | struct sdp_hah { | |
177 | u8 bsdh[16]; | |
178 | u8 sdp_version; | |
179 | }; | |
180 | ||
181 | #define CMA_VERSION 0x00 | |
182 | #define SDP_MAJ_VERSION 0x2 | |
183 | ||
184 | static int cma_comp(struct rdma_id_private *id_priv, enum cma_state comp) | |
185 | { | |
186 | unsigned long flags; | |
187 | int ret; | |
188 | ||
189 | spin_lock_irqsave(&id_priv->lock, flags); | |
190 | ret = (id_priv->state == comp); | |
191 | spin_unlock_irqrestore(&id_priv->lock, flags); | |
192 | return ret; | |
193 | } | |
194 | ||
195 | static int cma_comp_exch(struct rdma_id_private *id_priv, | |
196 | enum cma_state comp, enum cma_state exch) | |
197 | { | |
198 | unsigned long flags; | |
199 | int ret; | |
200 | ||
201 | spin_lock_irqsave(&id_priv->lock, flags); | |
202 | if ((ret = (id_priv->state == comp))) | |
203 | id_priv->state = exch; | |
204 | spin_unlock_irqrestore(&id_priv->lock, flags); | |
205 | return ret; | |
206 | } | |
207 | ||
208 | static enum cma_state cma_exch(struct rdma_id_private *id_priv, | |
209 | enum cma_state exch) | |
210 | { | |
211 | unsigned long flags; | |
212 | enum cma_state old; | |
213 | ||
214 | spin_lock_irqsave(&id_priv->lock, flags); | |
215 | old = id_priv->state; | |
216 | id_priv->state = exch; | |
217 | spin_unlock_irqrestore(&id_priv->lock, flags); | |
218 | return old; | |
219 | } | |
220 | ||
221 | static inline u8 cma_get_ip_ver(struct cma_hdr *hdr) | |
222 | { | |
223 | return hdr->ip_version >> 4; | |
224 | } | |
225 | ||
226 | static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver) | |
227 | { | |
228 | hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF); | |
229 | } | |
230 | ||
231 | static inline u8 sdp_get_majv(u8 sdp_version) | |
232 | { | |
233 | return sdp_version >> 4; | |
234 | } | |
235 | ||
236 | static inline u8 sdp_get_ip_ver(struct sdp_hh *hh) | |
237 | { | |
238 | return hh->ip_version >> 4; | |
239 | } | |
240 | ||
241 | static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver) | |
242 | { | |
243 | hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF); | |
244 | } | |
245 | ||
246 | static void cma_attach_to_dev(struct rdma_id_private *id_priv, | |
247 | struct cma_device *cma_dev) | |
248 | { | |
249 | atomic_inc(&cma_dev->refcount); | |
250 | id_priv->cma_dev = cma_dev; | |
251 | id_priv->id.device = cma_dev->device; | |
252 | list_add_tail(&id_priv->list, &cma_dev->id_list); | |
253 | } | |
254 | ||
255 | static inline void cma_deref_dev(struct cma_device *cma_dev) | |
256 | { | |
257 | if (atomic_dec_and_test(&cma_dev->refcount)) | |
258 | complete(&cma_dev->comp); | |
259 | } | |
260 | ||
261 | static void cma_detach_from_dev(struct rdma_id_private *id_priv) | |
262 | { | |
263 | list_del(&id_priv->list); | |
264 | cma_deref_dev(id_priv->cma_dev); | |
265 | id_priv->cma_dev = NULL; | |
266 | } | |
267 | ||
07ebafba | 268 | static int cma_acquire_dev(struct rdma_id_private *id_priv) |
e51060f0 | 269 | { |
07ebafba | 270 | enum rdma_node_type dev_type = id_priv->id.route.addr.dev_addr.dev_type; |
e51060f0 | 271 | struct cma_device *cma_dev; |
f0ee3404 | 272 | union ib_gid gid; |
e51060f0 SH |
273 | int ret = -ENODEV; |
274 | ||
07ebafba TT |
275 | switch (rdma_node_get_transport(dev_type)) { |
276 | case RDMA_TRANSPORT_IB: | |
277 | ib_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid); | |
278 | break; | |
279 | case RDMA_TRANSPORT_IWARP: | |
280 | iw_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid); | |
281 | break; | |
282 | default: | |
283 | return -ENODEV; | |
284 | } | |
61a73c70 | 285 | |
e51060f0 | 286 | list_for_each_entry(cma_dev, &dev_list, list) { |
f0ee3404 | 287 | ret = ib_find_cached_gid(cma_dev->device, &gid, |
e51060f0 SH |
288 | &id_priv->id.port_num, NULL); |
289 | if (!ret) { | |
290 | cma_attach_to_dev(id_priv, cma_dev); | |
291 | break; | |
292 | } | |
293 | } | |
e51060f0 SH |
294 | return ret; |
295 | } | |
296 | ||
e51060f0 SH |
297 | static void cma_deref_id(struct rdma_id_private *id_priv) |
298 | { | |
299 | if (atomic_dec_and_test(&id_priv->refcount)) | |
300 | complete(&id_priv->comp); | |
301 | } | |
302 | ||
303 | static void cma_release_remove(struct rdma_id_private *id_priv) | |
304 | { | |
305 | if (atomic_dec_and_test(&id_priv->dev_remove)) | |
306 | wake_up(&id_priv->wait_remove); | |
307 | } | |
308 | ||
309 | struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler, | |
310 | void *context, enum rdma_port_space ps) | |
311 | { | |
312 | struct rdma_id_private *id_priv; | |
313 | ||
314 | id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL); | |
315 | if (!id_priv) | |
316 | return ERR_PTR(-ENOMEM); | |
317 | ||
318 | id_priv->state = CMA_IDLE; | |
319 | id_priv->id.context = context; | |
320 | id_priv->id.event_handler = event_handler; | |
321 | id_priv->id.ps = ps; | |
322 | spin_lock_init(&id_priv->lock); | |
323 | init_completion(&id_priv->comp); | |
324 | atomic_set(&id_priv->refcount, 1); | |
325 | init_waitqueue_head(&id_priv->wait_remove); | |
326 | atomic_set(&id_priv->dev_remove, 0); | |
327 | INIT_LIST_HEAD(&id_priv->listen_list); | |
328 | get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num); | |
329 | ||
330 | return &id_priv->id; | |
331 | } | |
332 | EXPORT_SYMBOL(rdma_create_id); | |
333 | ||
334 | static int cma_init_ib_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) | |
335 | { | |
336 | struct ib_qp_attr qp_attr; | |
337 | struct rdma_dev_addr *dev_addr; | |
338 | int ret; | |
339 | ||
340 | dev_addr = &id_priv->id.route.addr.dev_addr; | |
341 | ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num, | |
342 | ib_addr_get_pkey(dev_addr), | |
343 | &qp_attr.pkey_index); | |
344 | if (ret) | |
345 | return ret; | |
346 | ||
347 | qp_attr.qp_state = IB_QPS_INIT; | |
e31353ea | 348 | qp_attr.qp_access_flags = 0; |
e51060f0 SH |
349 | qp_attr.port_num = id_priv->id.port_num; |
350 | return ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_ACCESS_FLAGS | | |
351 | IB_QP_PKEY_INDEX | IB_QP_PORT); | |
352 | } | |
353 | ||
07ebafba TT |
354 | static int cma_init_iw_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) |
355 | { | |
356 | struct ib_qp_attr qp_attr; | |
357 | ||
358 | qp_attr.qp_state = IB_QPS_INIT; | |
359 | qp_attr.qp_access_flags = IB_ACCESS_LOCAL_WRITE; | |
360 | ||
361 | return ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_ACCESS_FLAGS); | |
362 | } | |
363 | ||
e51060f0 SH |
364 | int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd, |
365 | struct ib_qp_init_attr *qp_init_attr) | |
366 | { | |
367 | struct rdma_id_private *id_priv; | |
368 | struct ib_qp *qp; | |
369 | int ret; | |
370 | ||
371 | id_priv = container_of(id, struct rdma_id_private, id); | |
372 | if (id->device != pd->device) | |
373 | return -EINVAL; | |
374 | ||
375 | qp = ib_create_qp(pd, qp_init_attr); | |
376 | if (IS_ERR(qp)) | |
377 | return PTR_ERR(qp); | |
378 | ||
07ebafba TT |
379 | switch (rdma_node_get_transport(id->device->node_type)) { |
380 | case RDMA_TRANSPORT_IB: | |
e51060f0 SH |
381 | ret = cma_init_ib_qp(id_priv, qp); |
382 | break; | |
07ebafba TT |
383 | case RDMA_TRANSPORT_IWARP: |
384 | ret = cma_init_iw_qp(id_priv, qp); | |
385 | break; | |
e51060f0 SH |
386 | default: |
387 | ret = -ENOSYS; | |
388 | break; | |
389 | } | |
390 | ||
391 | if (ret) | |
392 | goto err; | |
393 | ||
394 | id->qp = qp; | |
395 | id_priv->qp_num = qp->qp_num; | |
e51060f0 SH |
396 | id_priv->srq = (qp->srq != NULL); |
397 | return 0; | |
398 | err: | |
399 | ib_destroy_qp(qp); | |
400 | return ret; | |
401 | } | |
402 | EXPORT_SYMBOL(rdma_create_qp); | |
403 | ||
404 | void rdma_destroy_qp(struct rdma_cm_id *id) | |
405 | { | |
406 | ib_destroy_qp(id->qp); | |
407 | } | |
408 | EXPORT_SYMBOL(rdma_destroy_qp); | |
409 | ||
410 | static int cma_modify_qp_rtr(struct rdma_cm_id *id) | |
411 | { | |
412 | struct ib_qp_attr qp_attr; | |
413 | int qp_attr_mask, ret; | |
414 | ||
415 | if (!id->qp) | |
416 | return 0; | |
417 | ||
418 | /* Need to update QP attributes from default values. */ | |
419 | qp_attr.qp_state = IB_QPS_INIT; | |
420 | ret = rdma_init_qp_attr(id, &qp_attr, &qp_attr_mask); | |
421 | if (ret) | |
422 | return ret; | |
423 | ||
424 | ret = ib_modify_qp(id->qp, &qp_attr, qp_attr_mask); | |
425 | if (ret) | |
426 | return ret; | |
427 | ||
428 | qp_attr.qp_state = IB_QPS_RTR; | |
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_rts(struct rdma_cm_id *id) | |
437 | { | |
438 | struct ib_qp_attr qp_attr; | |
439 | int qp_attr_mask, ret; | |
440 | ||
441 | if (!id->qp) | |
442 | return 0; | |
443 | ||
444 | qp_attr.qp_state = IB_QPS_RTS; | |
445 | ret = rdma_init_qp_attr(id, &qp_attr, &qp_attr_mask); | |
446 | if (ret) | |
447 | return ret; | |
448 | ||
449 | return ib_modify_qp(id->qp, &qp_attr, qp_attr_mask); | |
450 | } | |
451 | ||
452 | static int cma_modify_qp_err(struct rdma_cm_id *id) | |
453 | { | |
454 | struct ib_qp_attr qp_attr; | |
455 | ||
456 | if (!id->qp) | |
457 | return 0; | |
458 | ||
459 | qp_attr.qp_state = IB_QPS_ERR; | |
460 | return ib_modify_qp(id->qp, &qp_attr, IB_QP_STATE); | |
461 | } | |
462 | ||
463 | int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr, | |
464 | int *qp_attr_mask) | |
465 | { | |
466 | struct rdma_id_private *id_priv; | |
467 | int ret; | |
468 | ||
469 | id_priv = container_of(id, struct rdma_id_private, id); | |
07ebafba TT |
470 | switch (rdma_node_get_transport(id_priv->id.device->node_type)) { |
471 | case RDMA_TRANSPORT_IB: | |
e51060f0 SH |
472 | ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr, |
473 | qp_attr_mask); | |
474 | if (qp_attr->qp_state == IB_QPS_RTR) | |
475 | qp_attr->rq_psn = id_priv->seq_num; | |
476 | break; | |
07ebafba TT |
477 | case RDMA_TRANSPORT_IWARP: |
478 | ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr, | |
479 | qp_attr_mask); | |
480 | break; | |
e51060f0 SH |
481 | default: |
482 | ret = -ENOSYS; | |
483 | break; | |
484 | } | |
485 | ||
486 | return ret; | |
487 | } | |
488 | EXPORT_SYMBOL(rdma_init_qp_attr); | |
489 | ||
490 | static inline int cma_zero_addr(struct sockaddr *addr) | |
491 | { | |
492 | struct in6_addr *ip6; | |
493 | ||
494 | if (addr->sa_family == AF_INET) | |
495 | return ZERONET(((struct sockaddr_in *) addr)->sin_addr.s_addr); | |
496 | else { | |
497 | ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr; | |
498 | return (ip6->s6_addr32[0] | ip6->s6_addr32[1] | | |
5fd571cb | 499 | ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0; |
e51060f0 SH |
500 | } |
501 | } | |
502 | ||
503 | static inline int cma_loopback_addr(struct sockaddr *addr) | |
504 | { | |
505 | return LOOPBACK(((struct sockaddr_in *) addr)->sin_addr.s_addr); | |
506 | } | |
507 | ||
508 | static inline int cma_any_addr(struct sockaddr *addr) | |
509 | { | |
510 | return cma_zero_addr(addr) || cma_loopback_addr(addr); | |
511 | } | |
512 | ||
628e5f6d SH |
513 | static inline __be16 cma_port(struct sockaddr *addr) |
514 | { | |
515 | if (addr->sa_family == AF_INET) | |
516 | return ((struct sockaddr_in *) addr)->sin_port; | |
517 | else | |
518 | return ((struct sockaddr_in6 *) addr)->sin6_port; | |
519 | } | |
520 | ||
e51060f0 SH |
521 | static inline int cma_any_port(struct sockaddr *addr) |
522 | { | |
628e5f6d | 523 | return !cma_port(addr); |
e51060f0 SH |
524 | } |
525 | ||
526 | static int cma_get_net_info(void *hdr, enum rdma_port_space ps, | |
527 | u8 *ip_ver, __u16 *port, | |
528 | union cma_ip_addr **src, union cma_ip_addr **dst) | |
529 | { | |
530 | switch (ps) { | |
531 | case RDMA_PS_SDP: | |
532 | if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) != | |
533 | SDP_MAJ_VERSION) | |
534 | return -EINVAL; | |
535 | ||
536 | *ip_ver = sdp_get_ip_ver(hdr); | |
537 | *port = ((struct sdp_hh *) hdr)->port; | |
538 | *src = &((struct sdp_hh *) hdr)->src_addr; | |
539 | *dst = &((struct sdp_hh *) hdr)->dst_addr; | |
540 | break; | |
541 | default: | |
542 | if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION) | |
543 | return -EINVAL; | |
544 | ||
545 | *ip_ver = cma_get_ip_ver(hdr); | |
546 | *port = ((struct cma_hdr *) hdr)->port; | |
547 | *src = &((struct cma_hdr *) hdr)->src_addr; | |
548 | *dst = &((struct cma_hdr *) hdr)->dst_addr; | |
549 | break; | |
550 | } | |
551 | ||
552 | if (*ip_ver != 4 && *ip_ver != 6) | |
553 | return -EINVAL; | |
554 | return 0; | |
555 | } | |
556 | ||
557 | static void cma_save_net_info(struct rdma_addr *addr, | |
558 | struct rdma_addr *listen_addr, | |
559 | u8 ip_ver, __u16 port, | |
560 | union cma_ip_addr *src, union cma_ip_addr *dst) | |
561 | { | |
562 | struct sockaddr_in *listen4, *ip4; | |
563 | struct sockaddr_in6 *listen6, *ip6; | |
564 | ||
565 | switch (ip_ver) { | |
566 | case 4: | |
567 | listen4 = (struct sockaddr_in *) &listen_addr->src_addr; | |
568 | ip4 = (struct sockaddr_in *) &addr->src_addr; | |
569 | ip4->sin_family = listen4->sin_family; | |
570 | ip4->sin_addr.s_addr = dst->ip4.addr; | |
571 | ip4->sin_port = listen4->sin_port; | |
572 | ||
573 | ip4 = (struct sockaddr_in *) &addr->dst_addr; | |
574 | ip4->sin_family = listen4->sin_family; | |
575 | ip4->sin_addr.s_addr = src->ip4.addr; | |
576 | ip4->sin_port = port; | |
577 | break; | |
578 | case 6: | |
579 | listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr; | |
580 | ip6 = (struct sockaddr_in6 *) &addr->src_addr; | |
581 | ip6->sin6_family = listen6->sin6_family; | |
582 | ip6->sin6_addr = dst->ip6; | |
583 | ip6->sin6_port = listen6->sin6_port; | |
584 | ||
585 | ip6 = (struct sockaddr_in6 *) &addr->dst_addr; | |
586 | ip6->sin6_family = listen6->sin6_family; | |
587 | ip6->sin6_addr = src->ip6; | |
588 | ip6->sin6_port = port; | |
589 | break; | |
590 | default: | |
591 | break; | |
592 | } | |
593 | } | |
594 | ||
595 | static inline int cma_user_data_offset(enum rdma_port_space ps) | |
596 | { | |
597 | switch (ps) { | |
598 | case RDMA_PS_SDP: | |
599 | return 0; | |
600 | default: | |
601 | return sizeof(struct cma_hdr); | |
602 | } | |
603 | } | |
604 | ||
e51060f0 SH |
605 | static void cma_cancel_route(struct rdma_id_private *id_priv) |
606 | { | |
07ebafba TT |
607 | switch (rdma_node_get_transport(id_priv->id.device->node_type)) { |
608 | case RDMA_TRANSPORT_IB: | |
e51060f0 SH |
609 | if (id_priv->query) |
610 | ib_sa_cancel_query(id_priv->query_id, id_priv->query); | |
611 | break; | |
612 | default: | |
613 | break; | |
614 | } | |
615 | } | |
616 | ||
617 | static inline int cma_internal_listen(struct rdma_id_private *id_priv) | |
618 | { | |
619 | return (id_priv->state == CMA_LISTEN) && id_priv->cma_dev && | |
620 | cma_any_addr(&id_priv->id.route.addr.src_addr); | |
621 | } | |
622 | ||
623 | static void cma_destroy_listen(struct rdma_id_private *id_priv) | |
624 | { | |
625 | cma_exch(id_priv, CMA_DESTROYING); | |
626 | ||
627 | if (id_priv->cma_dev) { | |
07ebafba TT |
628 | switch (rdma_node_get_transport(id_priv->id.device->node_type)) { |
629 | case RDMA_TRANSPORT_IB: | |
3cd96564 | 630 | if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib)) |
e51060f0 SH |
631 | ib_destroy_cm_id(id_priv->cm_id.ib); |
632 | break; | |
07ebafba TT |
633 | case RDMA_TRANSPORT_IWARP: |
634 | if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw)) | |
635 | iw_destroy_cm_id(id_priv->cm_id.iw); | |
636 | break; | |
e51060f0 SH |
637 | default: |
638 | break; | |
639 | } | |
640 | cma_detach_from_dev(id_priv); | |
641 | } | |
642 | list_del(&id_priv->listen_list); | |
643 | ||
644 | cma_deref_id(id_priv); | |
645 | wait_for_completion(&id_priv->comp); | |
646 | ||
647 | kfree(id_priv); | |
648 | } | |
649 | ||
650 | static void cma_cancel_listens(struct rdma_id_private *id_priv) | |
651 | { | |
652 | struct rdma_id_private *dev_id_priv; | |
653 | ||
654 | mutex_lock(&lock); | |
655 | list_del(&id_priv->list); | |
656 | ||
657 | while (!list_empty(&id_priv->listen_list)) { | |
658 | dev_id_priv = list_entry(id_priv->listen_list.next, | |
659 | struct rdma_id_private, listen_list); | |
660 | cma_destroy_listen(dev_id_priv); | |
661 | } | |
662 | mutex_unlock(&lock); | |
663 | } | |
664 | ||
665 | static void cma_cancel_operation(struct rdma_id_private *id_priv, | |
666 | enum cma_state state) | |
667 | { | |
668 | switch (state) { | |
669 | case CMA_ADDR_QUERY: | |
670 | rdma_addr_cancel(&id_priv->id.route.addr.dev_addr); | |
671 | break; | |
672 | case CMA_ROUTE_QUERY: | |
673 | cma_cancel_route(id_priv); | |
674 | break; | |
675 | case CMA_LISTEN: | |
676 | if (cma_any_addr(&id_priv->id.route.addr.src_addr) && | |
677 | !id_priv->cma_dev) | |
678 | cma_cancel_listens(id_priv); | |
679 | break; | |
680 | default: | |
681 | break; | |
682 | } | |
683 | } | |
684 | ||
685 | static void cma_release_port(struct rdma_id_private *id_priv) | |
686 | { | |
687 | struct rdma_bind_list *bind_list = id_priv->bind_list; | |
688 | ||
689 | if (!bind_list) | |
690 | return; | |
691 | ||
692 | mutex_lock(&lock); | |
693 | hlist_del(&id_priv->node); | |
694 | if (hlist_empty(&bind_list->owners)) { | |
695 | idr_remove(bind_list->ps, bind_list->port); | |
696 | kfree(bind_list); | |
697 | } | |
698 | mutex_unlock(&lock); | |
699 | } | |
700 | ||
701 | void rdma_destroy_id(struct rdma_cm_id *id) | |
702 | { | |
703 | struct rdma_id_private *id_priv; | |
704 | enum cma_state state; | |
705 | ||
706 | id_priv = container_of(id, struct rdma_id_private, id); | |
707 | state = cma_exch(id_priv, CMA_DESTROYING); | |
708 | cma_cancel_operation(id_priv, state); | |
709 | ||
61a73c70 | 710 | mutex_lock(&lock); |
e51060f0 | 711 | if (id_priv->cma_dev) { |
61a73c70 | 712 | mutex_unlock(&lock); |
07ebafba TT |
713 | switch (rdma_node_get_transport(id->device->node_type)) { |
714 | case RDMA_TRANSPORT_IB: | |
3cd96564 | 715 | if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib)) |
e51060f0 SH |
716 | ib_destroy_cm_id(id_priv->cm_id.ib); |
717 | break; | |
07ebafba TT |
718 | case RDMA_TRANSPORT_IWARP: |
719 | if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw)) | |
720 | iw_destroy_cm_id(id_priv->cm_id.iw); | |
721 | break; | |
e51060f0 SH |
722 | default: |
723 | break; | |
724 | } | |
3cd96564 | 725 | mutex_lock(&lock); |
e51060f0 | 726 | cma_detach_from_dev(id_priv); |
e51060f0 | 727 | } |
61a73c70 | 728 | mutex_unlock(&lock); |
e51060f0 SH |
729 | |
730 | cma_release_port(id_priv); | |
731 | cma_deref_id(id_priv); | |
732 | wait_for_completion(&id_priv->comp); | |
733 | ||
734 | kfree(id_priv->id.route.path_rec); | |
735 | kfree(id_priv); | |
736 | } | |
737 | EXPORT_SYMBOL(rdma_destroy_id); | |
738 | ||
739 | static int cma_rep_recv(struct rdma_id_private *id_priv) | |
740 | { | |
741 | int ret; | |
742 | ||
743 | ret = cma_modify_qp_rtr(&id_priv->id); | |
744 | if (ret) | |
745 | goto reject; | |
746 | ||
747 | ret = cma_modify_qp_rts(&id_priv->id); | |
748 | if (ret) | |
749 | goto reject; | |
750 | ||
751 | ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0); | |
752 | if (ret) | |
753 | goto reject; | |
754 | ||
755 | return 0; | |
756 | reject: | |
757 | cma_modify_qp_err(&id_priv->id); | |
758 | ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED, | |
759 | NULL, 0, NULL, 0); | |
760 | return ret; | |
761 | } | |
762 | ||
763 | static int cma_verify_rep(struct rdma_id_private *id_priv, void *data) | |
764 | { | |
765 | if (id_priv->id.ps == RDMA_PS_SDP && | |
766 | sdp_get_majv(((struct sdp_hah *) data)->sdp_version) != | |
767 | SDP_MAJ_VERSION) | |
768 | return -EINVAL; | |
769 | ||
770 | return 0; | |
771 | } | |
772 | ||
a1b1b61f SH |
773 | static void cma_set_rep_event_data(struct rdma_cm_event *event, |
774 | struct ib_cm_rep_event_param *rep_data, | |
775 | void *private_data) | |
776 | { | |
777 | event->param.conn.private_data = private_data; | |
778 | event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE; | |
779 | event->param.conn.responder_resources = rep_data->responder_resources; | |
780 | event->param.conn.initiator_depth = rep_data->initiator_depth; | |
781 | event->param.conn.flow_control = rep_data->flow_control; | |
782 | event->param.conn.rnr_retry_count = rep_data->rnr_retry_count; | |
783 | event->param.conn.srq = rep_data->srq; | |
784 | event->param.conn.qp_num = rep_data->remote_qpn; | |
785 | } | |
786 | ||
e51060f0 SH |
787 | static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) |
788 | { | |
789 | struct rdma_id_private *id_priv = cm_id->context; | |
a1b1b61f SH |
790 | struct rdma_cm_event event; |
791 | int ret = 0; | |
e51060f0 SH |
792 | |
793 | atomic_inc(&id_priv->dev_remove); | |
794 | if (!cma_comp(id_priv, CMA_CONNECT)) | |
795 | goto out; | |
796 | ||
a1b1b61f | 797 | memset(&event, 0, sizeof event); |
e51060f0 SH |
798 | switch (ib_event->event) { |
799 | case IB_CM_REQ_ERROR: | |
800 | case IB_CM_REP_ERROR: | |
a1b1b61f SH |
801 | event.event = RDMA_CM_EVENT_UNREACHABLE; |
802 | event.status = -ETIMEDOUT; | |
e51060f0 SH |
803 | break; |
804 | case IB_CM_REP_RECEIVED: | |
a1b1b61f SH |
805 | event.status = cma_verify_rep(id_priv, ib_event->private_data); |
806 | if (event.status) | |
807 | event.event = RDMA_CM_EVENT_CONNECT_ERROR; | |
e51060f0 | 808 | else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) { |
a1b1b61f SH |
809 | event.status = cma_rep_recv(id_priv); |
810 | event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR : | |
811 | RDMA_CM_EVENT_ESTABLISHED; | |
e51060f0 | 812 | } else |
a1b1b61f SH |
813 | event.event = RDMA_CM_EVENT_CONNECT_RESPONSE; |
814 | cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd, | |
815 | ib_event->private_data); | |
e51060f0 SH |
816 | break; |
817 | case IB_CM_RTU_RECEIVED: | |
0fe313b0 SH |
818 | case IB_CM_USER_ESTABLISHED: |
819 | event.event = RDMA_CM_EVENT_ESTABLISHED; | |
e51060f0 SH |
820 | break; |
821 | case IB_CM_DREQ_ERROR: | |
a1b1b61f | 822 | event.status = -ETIMEDOUT; /* fall through */ |
e51060f0 SH |
823 | case IB_CM_DREQ_RECEIVED: |
824 | case IB_CM_DREP_RECEIVED: | |
825 | if (!cma_comp_exch(id_priv, CMA_CONNECT, CMA_DISCONNECT)) | |
826 | goto out; | |
a1b1b61f | 827 | event.event = RDMA_CM_EVENT_DISCONNECTED; |
e51060f0 SH |
828 | break; |
829 | case IB_CM_TIMEWAIT_EXIT: | |
830 | case IB_CM_MRA_RECEIVED: | |
831 | /* ignore event */ | |
832 | goto out; | |
833 | case IB_CM_REJ_RECEIVED: | |
834 | cma_modify_qp_err(&id_priv->id); | |
a1b1b61f SH |
835 | event.status = ib_event->param.rej_rcvd.reason; |
836 | event.event = RDMA_CM_EVENT_REJECTED; | |
837 | event.param.conn.private_data = ib_event->private_data; | |
838 | event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; | |
e51060f0 SH |
839 | break; |
840 | default: | |
841 | printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d", | |
842 | ib_event->event); | |
843 | goto out; | |
844 | } | |
845 | ||
a1b1b61f | 846 | ret = id_priv->id.event_handler(&id_priv->id, &event); |
e51060f0 SH |
847 | if (ret) { |
848 | /* Destroy the CM ID by returning a non-zero value. */ | |
849 | id_priv->cm_id.ib = NULL; | |
850 | cma_exch(id_priv, CMA_DESTROYING); | |
851 | cma_release_remove(id_priv); | |
852 | rdma_destroy_id(&id_priv->id); | |
853 | return ret; | |
854 | } | |
855 | out: | |
856 | cma_release_remove(id_priv); | |
857 | return ret; | |
858 | } | |
859 | ||
628e5f6d SH |
860 | static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id, |
861 | struct ib_cm_event *ib_event) | |
e51060f0 SH |
862 | { |
863 | struct rdma_id_private *id_priv; | |
864 | struct rdma_cm_id *id; | |
865 | struct rdma_route *rt; | |
866 | union cma_ip_addr *src, *dst; | |
867 | __u16 port; | |
868 | u8 ip_ver; | |
869 | ||
3f168d2b KK |
870 | if (cma_get_net_info(ib_event->private_data, listen_id->ps, |
871 | &ip_ver, &port, &src, &dst)) | |
872 | goto err; | |
873 | ||
e51060f0 SH |
874 | id = rdma_create_id(listen_id->event_handler, listen_id->context, |
875 | listen_id->ps); | |
876 | if (IS_ERR(id)) | |
3f168d2b KK |
877 | goto err; |
878 | ||
879 | cma_save_net_info(&id->route.addr, &listen_id->route.addr, | |
880 | ip_ver, port, src, dst); | |
e51060f0 SH |
881 | |
882 | rt = &id->route; | |
883 | rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1; | |
3f168d2b KK |
884 | rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths, |
885 | GFP_KERNEL); | |
e51060f0 | 886 | if (!rt->path_rec) |
3f168d2b | 887 | goto destroy_id; |
e51060f0 | 888 | |
e51060f0 SH |
889 | rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path; |
890 | if (rt->num_paths == 2) | |
891 | rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path; | |
892 | ||
893 | ib_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid); | |
894 | ib_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid); | |
895 | ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey)); | |
07ebafba | 896 | rt->addr.dev_addr.dev_type = RDMA_NODE_IB_CA; |
e51060f0 SH |
897 | |
898 | id_priv = container_of(id, struct rdma_id_private, id); | |
899 | id_priv->state = CMA_CONNECT; | |
900 | return id_priv; | |
3f168d2b KK |
901 | |
902 | destroy_id: | |
e51060f0 | 903 | rdma_destroy_id(id); |
3f168d2b | 904 | err: |
e51060f0 SH |
905 | return NULL; |
906 | } | |
907 | ||
628e5f6d SH |
908 | static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id, |
909 | struct ib_cm_event *ib_event) | |
910 | { | |
911 | struct rdma_id_private *id_priv; | |
912 | struct rdma_cm_id *id; | |
913 | union cma_ip_addr *src, *dst; | |
914 | __u16 port; | |
915 | u8 ip_ver; | |
916 | int ret; | |
917 | ||
918 | id = rdma_create_id(listen_id->event_handler, listen_id->context, | |
919 | listen_id->ps); | |
920 | if (IS_ERR(id)) | |
921 | return NULL; | |
922 | ||
923 | ||
924 | if (cma_get_net_info(ib_event->private_data, listen_id->ps, | |
925 | &ip_ver, &port, &src, &dst)) | |
926 | goto err; | |
927 | ||
928 | cma_save_net_info(&id->route.addr, &listen_id->route.addr, | |
929 | ip_ver, port, src, dst); | |
930 | ||
931 | ret = rdma_translate_ip(&id->route.addr.src_addr, | |
932 | &id->route.addr.dev_addr); | |
933 | if (ret) | |
934 | goto err; | |
935 | ||
936 | id_priv = container_of(id, struct rdma_id_private, id); | |
937 | id_priv->state = CMA_CONNECT; | |
938 | return id_priv; | |
939 | err: | |
940 | rdma_destroy_id(id); | |
941 | return NULL; | |
942 | } | |
943 | ||
a1b1b61f SH |
944 | static void cma_set_req_event_data(struct rdma_cm_event *event, |
945 | struct ib_cm_req_event_param *req_data, | |
946 | void *private_data, int offset) | |
947 | { | |
948 | event->param.conn.private_data = private_data + offset; | |
949 | event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset; | |
950 | event->param.conn.responder_resources = req_data->responder_resources; | |
951 | event->param.conn.initiator_depth = req_data->initiator_depth; | |
952 | event->param.conn.flow_control = req_data->flow_control; | |
953 | event->param.conn.retry_count = req_data->retry_count; | |
954 | event->param.conn.rnr_retry_count = req_data->rnr_retry_count; | |
955 | event->param.conn.srq = req_data->srq; | |
956 | event->param.conn.qp_num = req_data->remote_qpn; | |
957 | } | |
958 | ||
e51060f0 SH |
959 | static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) |
960 | { | |
961 | struct rdma_id_private *listen_id, *conn_id; | |
a1b1b61f | 962 | struct rdma_cm_event event; |
e51060f0 SH |
963 | int offset, ret; |
964 | ||
965 | listen_id = cm_id->context; | |
966 | atomic_inc(&listen_id->dev_remove); | |
967 | if (!cma_comp(listen_id, CMA_LISTEN)) { | |
968 | ret = -ECONNABORTED; | |
969 | goto out; | |
970 | } | |
971 | ||
628e5f6d SH |
972 | memset(&event, 0, sizeof event); |
973 | offset = cma_user_data_offset(listen_id->id.ps); | |
974 | event.event = RDMA_CM_EVENT_CONNECT_REQUEST; | |
975 | if (listen_id->id.ps == RDMA_PS_UDP) { | |
976 | conn_id = cma_new_udp_id(&listen_id->id, ib_event); | |
977 | event.param.ud.private_data = ib_event->private_data + offset; | |
978 | event.param.ud.private_data_len = | |
979 | IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset; | |
980 | } else { | |
981 | conn_id = cma_new_conn_id(&listen_id->id, ib_event); | |
982 | cma_set_req_event_data(&event, &ib_event->param.req_rcvd, | |
983 | ib_event->private_data, offset); | |
984 | } | |
e51060f0 SH |
985 | if (!conn_id) { |
986 | ret = -ENOMEM; | |
987 | goto out; | |
988 | } | |
989 | ||
990 | atomic_inc(&conn_id->dev_remove); | |
61a73c70 | 991 | mutex_lock(&lock); |
07ebafba | 992 | ret = cma_acquire_dev(conn_id); |
61a73c70 | 993 | mutex_unlock(&lock); |
a1a733f6 KK |
994 | if (ret) |
995 | goto release_conn_id; | |
e51060f0 SH |
996 | |
997 | conn_id->cm_id.ib = cm_id; | |
998 | cm_id->context = conn_id; | |
999 | cm_id->cm_handler = cma_ib_handler; | |
1000 | ||
a1b1b61f | 1001 | ret = conn_id->id.event_handler(&conn_id->id, &event); |
a1a733f6 KK |
1002 | if (!ret) |
1003 | goto out; | |
1004 | ||
1005 | /* Destroy the CM ID by returning a non-zero value. */ | |
1006 | conn_id->cm_id.ib = NULL; | |
1007 | ||
1008 | release_conn_id: | |
1009 | cma_exch(conn_id, CMA_DESTROYING); | |
1010 | cma_release_remove(conn_id); | |
1011 | rdma_destroy_id(&conn_id->id); | |
1012 | ||
e51060f0 SH |
1013 | out: |
1014 | cma_release_remove(listen_id); | |
1015 | return ret; | |
1016 | } | |
1017 | ||
1018 | static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr) | |
1019 | { | |
628e5f6d | 1020 | return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr))); |
e51060f0 SH |
1021 | } |
1022 | ||
1023 | static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr, | |
1024 | struct ib_cm_compare_data *compare) | |
1025 | { | |
1026 | struct cma_hdr *cma_data, *cma_mask; | |
1027 | struct sdp_hh *sdp_data, *sdp_mask; | |
1028 | __u32 ip4_addr; | |
1029 | struct in6_addr ip6_addr; | |
1030 | ||
1031 | memset(compare, 0, sizeof *compare); | |
1032 | cma_data = (void *) compare->data; | |
1033 | cma_mask = (void *) compare->mask; | |
1034 | sdp_data = (void *) compare->data; | |
1035 | sdp_mask = (void *) compare->mask; | |
1036 | ||
1037 | switch (addr->sa_family) { | |
1038 | case AF_INET: | |
1039 | ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr; | |
1040 | if (ps == RDMA_PS_SDP) { | |
1041 | sdp_set_ip_ver(sdp_data, 4); | |
1042 | sdp_set_ip_ver(sdp_mask, 0xF); | |
1043 | sdp_data->dst_addr.ip4.addr = ip4_addr; | |
1044 | sdp_mask->dst_addr.ip4.addr = ~0; | |
1045 | } else { | |
1046 | cma_set_ip_ver(cma_data, 4); | |
1047 | cma_set_ip_ver(cma_mask, 0xF); | |
1048 | cma_data->dst_addr.ip4.addr = ip4_addr; | |
1049 | cma_mask->dst_addr.ip4.addr = ~0; | |
1050 | } | |
1051 | break; | |
1052 | case AF_INET6: | |
1053 | ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr; | |
1054 | if (ps == RDMA_PS_SDP) { | |
1055 | sdp_set_ip_ver(sdp_data, 6); | |
1056 | sdp_set_ip_ver(sdp_mask, 0xF); | |
1057 | sdp_data->dst_addr.ip6 = ip6_addr; | |
1058 | memset(&sdp_mask->dst_addr.ip6, 0xFF, | |
1059 | sizeof sdp_mask->dst_addr.ip6); | |
1060 | } else { | |
1061 | cma_set_ip_ver(cma_data, 6); | |
1062 | cma_set_ip_ver(cma_mask, 0xF); | |
1063 | cma_data->dst_addr.ip6 = ip6_addr; | |
1064 | memset(&cma_mask->dst_addr.ip6, 0xFF, | |
1065 | sizeof cma_mask->dst_addr.ip6); | |
1066 | } | |
1067 | break; | |
1068 | default: | |
1069 | break; | |
1070 | } | |
1071 | } | |
1072 | ||
07ebafba TT |
1073 | static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event) |
1074 | { | |
1075 | struct rdma_id_private *id_priv = iw_id->context; | |
a1b1b61f | 1076 | struct rdma_cm_event event; |
07ebafba TT |
1077 | struct sockaddr_in *sin; |
1078 | int ret = 0; | |
1079 | ||
a1b1b61f | 1080 | memset(&event, 0, sizeof event); |
07ebafba TT |
1081 | atomic_inc(&id_priv->dev_remove); |
1082 | ||
1083 | switch (iw_event->event) { | |
1084 | case IW_CM_EVENT_CLOSE: | |
a1b1b61f | 1085 | event.event = RDMA_CM_EVENT_DISCONNECTED; |
07ebafba TT |
1086 | break; |
1087 | case IW_CM_EVENT_CONNECT_REPLY: | |
1088 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; | |
1089 | *sin = iw_event->local_addr; | |
1090 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr; | |
1091 | *sin = iw_event->remote_addr; | |
881a045f SW |
1092 | switch (iw_event->status) { |
1093 | case 0: | |
a1b1b61f | 1094 | event.event = RDMA_CM_EVENT_ESTABLISHED; |
881a045f SW |
1095 | break; |
1096 | case -ECONNRESET: | |
1097 | case -ECONNREFUSED: | |
1098 | event.event = RDMA_CM_EVENT_REJECTED; | |
1099 | break; | |
1100 | case -ETIMEDOUT: | |
1101 | event.event = RDMA_CM_EVENT_UNREACHABLE; | |
1102 | break; | |
1103 | default: | |
1104 | event.event = RDMA_CM_EVENT_CONNECT_ERROR; | |
1105 | break; | |
1106 | } | |
07ebafba TT |
1107 | break; |
1108 | case IW_CM_EVENT_ESTABLISHED: | |
a1b1b61f | 1109 | event.event = RDMA_CM_EVENT_ESTABLISHED; |
07ebafba TT |
1110 | break; |
1111 | default: | |
1112 | BUG_ON(1); | |
1113 | } | |
1114 | ||
a1b1b61f SH |
1115 | event.status = iw_event->status; |
1116 | event.param.conn.private_data = iw_event->private_data; | |
1117 | event.param.conn.private_data_len = iw_event->private_data_len; | |
1118 | ret = id_priv->id.event_handler(&id_priv->id, &event); | |
07ebafba TT |
1119 | if (ret) { |
1120 | /* Destroy the CM ID by returning a non-zero value. */ | |
1121 | id_priv->cm_id.iw = NULL; | |
1122 | cma_exch(id_priv, CMA_DESTROYING); | |
1123 | cma_release_remove(id_priv); | |
1124 | rdma_destroy_id(&id_priv->id); | |
1125 | return ret; | |
1126 | } | |
1127 | ||
1128 | cma_release_remove(id_priv); | |
1129 | return ret; | |
1130 | } | |
1131 | ||
1132 | static int iw_conn_req_handler(struct iw_cm_id *cm_id, | |
1133 | struct iw_cm_event *iw_event) | |
1134 | { | |
1135 | struct rdma_cm_id *new_cm_id; | |
1136 | struct rdma_id_private *listen_id, *conn_id; | |
1137 | struct sockaddr_in *sin; | |
1138 | struct net_device *dev = NULL; | |
a1b1b61f | 1139 | struct rdma_cm_event event; |
07ebafba TT |
1140 | int ret; |
1141 | ||
1142 | listen_id = cm_id->context; | |
1143 | atomic_inc(&listen_id->dev_remove); | |
1144 | if (!cma_comp(listen_id, CMA_LISTEN)) { | |
1145 | ret = -ECONNABORTED; | |
1146 | goto out; | |
1147 | } | |
1148 | ||
1149 | /* Create a new RDMA id for the new IW CM ID */ | |
1150 | new_cm_id = rdma_create_id(listen_id->id.event_handler, | |
1151 | listen_id->id.context, | |
1152 | RDMA_PS_TCP); | |
1153 | if (!new_cm_id) { | |
1154 | ret = -ENOMEM; | |
1155 | goto out; | |
1156 | } | |
1157 | conn_id = container_of(new_cm_id, struct rdma_id_private, id); | |
1158 | atomic_inc(&conn_id->dev_remove); | |
1159 | conn_id->state = CMA_CONNECT; | |
1160 | ||
1161 | dev = ip_dev_find(iw_event->local_addr.sin_addr.s_addr); | |
1162 | if (!dev) { | |
1163 | ret = -EADDRNOTAVAIL; | |
1164 | cma_release_remove(conn_id); | |
1165 | rdma_destroy_id(new_cm_id); | |
1166 | goto out; | |
1167 | } | |
1168 | ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL); | |
1169 | if (ret) { | |
1170 | cma_release_remove(conn_id); | |
1171 | rdma_destroy_id(new_cm_id); | |
1172 | goto out; | |
1173 | } | |
1174 | ||
61a73c70 | 1175 | mutex_lock(&lock); |
07ebafba | 1176 | ret = cma_acquire_dev(conn_id); |
61a73c70 | 1177 | mutex_unlock(&lock); |
07ebafba TT |
1178 | if (ret) { |
1179 | cma_release_remove(conn_id); | |
1180 | rdma_destroy_id(new_cm_id); | |
1181 | goto out; | |
1182 | } | |
1183 | ||
1184 | conn_id->cm_id.iw = cm_id; | |
1185 | cm_id->context = conn_id; | |
1186 | cm_id->cm_handler = cma_iw_handler; | |
1187 | ||
1188 | sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr; | |
1189 | *sin = iw_event->local_addr; | |
1190 | sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr; | |
1191 | *sin = iw_event->remote_addr; | |
1192 | ||
a1b1b61f SH |
1193 | memset(&event, 0, sizeof event); |
1194 | event.event = RDMA_CM_EVENT_CONNECT_REQUEST; | |
1195 | event.param.conn.private_data = iw_event->private_data; | |
1196 | event.param.conn.private_data_len = iw_event->private_data_len; | |
1197 | ret = conn_id->id.event_handler(&conn_id->id, &event); | |
07ebafba TT |
1198 | if (ret) { |
1199 | /* User wants to destroy the CM ID */ | |
1200 | conn_id->cm_id.iw = NULL; | |
1201 | cma_exch(conn_id, CMA_DESTROYING); | |
1202 | cma_release_remove(conn_id); | |
1203 | rdma_destroy_id(&conn_id->id); | |
1204 | } | |
1205 | ||
1206 | out: | |
1207 | if (dev) | |
1208 | dev_put(dev); | |
1209 | cma_release_remove(listen_id); | |
1210 | return ret; | |
1211 | } | |
1212 | ||
e51060f0 SH |
1213 | static int cma_ib_listen(struct rdma_id_private *id_priv) |
1214 | { | |
1215 | struct ib_cm_compare_data compare_data; | |
1216 | struct sockaddr *addr; | |
1217 | __be64 svc_id; | |
1218 | int ret; | |
1219 | ||
1220 | id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_req_handler, | |
1221 | id_priv); | |
1222 | if (IS_ERR(id_priv->cm_id.ib)) | |
1223 | return PTR_ERR(id_priv->cm_id.ib); | |
1224 | ||
1225 | addr = &id_priv->id.route.addr.src_addr; | |
1226 | svc_id = cma_get_service_id(id_priv->id.ps, addr); | |
1227 | if (cma_any_addr(addr)) | |
1228 | ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL); | |
1229 | else { | |
1230 | cma_set_compare_data(id_priv->id.ps, addr, &compare_data); | |
1231 | ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data); | |
1232 | } | |
1233 | ||
1234 | if (ret) { | |
1235 | ib_destroy_cm_id(id_priv->cm_id.ib); | |
1236 | id_priv->cm_id.ib = NULL; | |
1237 | } | |
1238 | ||
1239 | return ret; | |
1240 | } | |
1241 | ||
07ebafba TT |
1242 | static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog) |
1243 | { | |
1244 | int ret; | |
1245 | struct sockaddr_in *sin; | |
1246 | ||
1247 | id_priv->cm_id.iw = iw_create_cm_id(id_priv->id.device, | |
1248 | iw_conn_req_handler, | |
1249 | id_priv); | |
1250 | if (IS_ERR(id_priv->cm_id.iw)) | |
1251 | return PTR_ERR(id_priv->cm_id.iw); | |
1252 | ||
1253 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; | |
1254 | id_priv->cm_id.iw->local_addr = *sin; | |
1255 | ||
1256 | ret = iw_cm_listen(id_priv->cm_id.iw, backlog); | |
1257 | ||
1258 | if (ret) { | |
1259 | iw_destroy_cm_id(id_priv->cm_id.iw); | |
1260 | id_priv->cm_id.iw = NULL; | |
1261 | } | |
1262 | ||
1263 | return ret; | |
1264 | } | |
1265 | ||
e51060f0 SH |
1266 | static int cma_listen_handler(struct rdma_cm_id *id, |
1267 | struct rdma_cm_event *event) | |
1268 | { | |
1269 | struct rdma_id_private *id_priv = id->context; | |
1270 | ||
1271 | id->context = id_priv->id.context; | |
1272 | id->event_handler = id_priv->id.event_handler; | |
1273 | return id_priv->id.event_handler(id, event); | |
1274 | } | |
1275 | ||
1276 | static void cma_listen_on_dev(struct rdma_id_private *id_priv, | |
1277 | struct cma_device *cma_dev) | |
1278 | { | |
1279 | struct rdma_id_private *dev_id_priv; | |
1280 | struct rdma_cm_id *id; | |
1281 | int ret; | |
1282 | ||
1283 | id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps); | |
1284 | if (IS_ERR(id)) | |
1285 | return; | |
1286 | ||
1287 | dev_id_priv = container_of(id, struct rdma_id_private, id); | |
1288 | ||
1289 | dev_id_priv->state = CMA_ADDR_BOUND; | |
1290 | memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr, | |
1291 | ip_addr_size(&id_priv->id.route.addr.src_addr)); | |
1292 | ||
1293 | cma_attach_to_dev(dev_id_priv, cma_dev); | |
1294 | list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list); | |
1295 | ||
1296 | ret = rdma_listen(id, id_priv->backlog); | |
1297 | if (ret) | |
1298 | goto err; | |
1299 | ||
1300 | return; | |
1301 | err: | |
1302 | cma_destroy_listen(dev_id_priv); | |
1303 | } | |
1304 | ||
1305 | static void cma_listen_on_all(struct rdma_id_private *id_priv) | |
1306 | { | |
1307 | struct cma_device *cma_dev; | |
1308 | ||
1309 | mutex_lock(&lock); | |
1310 | list_add_tail(&id_priv->list, &listen_any_list); | |
1311 | list_for_each_entry(cma_dev, &dev_list, list) | |
1312 | cma_listen_on_dev(id_priv, cma_dev); | |
1313 | mutex_unlock(&lock); | |
1314 | } | |
1315 | ||
1316 | static int cma_bind_any(struct rdma_cm_id *id, sa_family_t af) | |
1317 | { | |
1318 | struct sockaddr_in addr_in; | |
1319 | ||
1320 | memset(&addr_in, 0, sizeof addr_in); | |
1321 | addr_in.sin_family = af; | |
1322 | return rdma_bind_addr(id, (struct sockaddr *) &addr_in); | |
1323 | } | |
1324 | ||
1325 | int rdma_listen(struct rdma_cm_id *id, int backlog) | |
1326 | { | |
1327 | struct rdma_id_private *id_priv; | |
1328 | int ret; | |
1329 | ||
1330 | id_priv = container_of(id, struct rdma_id_private, id); | |
1331 | if (id_priv->state == CMA_IDLE) { | |
1332 | ret = cma_bind_any(id, AF_INET); | |
1333 | if (ret) | |
1334 | return ret; | |
1335 | } | |
1336 | ||
1337 | if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_LISTEN)) | |
1338 | return -EINVAL; | |
1339 | ||
1340 | id_priv->backlog = backlog; | |
1341 | if (id->device) { | |
07ebafba TT |
1342 | switch (rdma_node_get_transport(id->device->node_type)) { |
1343 | case RDMA_TRANSPORT_IB: | |
e51060f0 SH |
1344 | ret = cma_ib_listen(id_priv); |
1345 | if (ret) | |
1346 | goto err; | |
1347 | break; | |
07ebafba TT |
1348 | case RDMA_TRANSPORT_IWARP: |
1349 | ret = cma_iw_listen(id_priv, backlog); | |
1350 | if (ret) | |
1351 | goto err; | |
1352 | break; | |
e51060f0 SH |
1353 | default: |
1354 | ret = -ENOSYS; | |
1355 | goto err; | |
1356 | } | |
1357 | } else | |
1358 | cma_listen_on_all(id_priv); | |
1359 | ||
1360 | return 0; | |
1361 | err: | |
1362 | id_priv->backlog = 0; | |
1363 | cma_comp_exch(id_priv, CMA_LISTEN, CMA_ADDR_BOUND); | |
1364 | return ret; | |
1365 | } | |
1366 | EXPORT_SYMBOL(rdma_listen); | |
1367 | ||
1368 | static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec, | |
1369 | void *context) | |
1370 | { | |
1371 | struct cma_work *work = context; | |
1372 | struct rdma_route *route; | |
1373 | ||
1374 | route = &work->id->id.route; | |
1375 | ||
1376 | if (!status) { | |
1377 | route->num_paths = 1; | |
1378 | *route->path_rec = *path_rec; | |
1379 | } else { | |
1380 | work->old_state = CMA_ROUTE_QUERY; | |
1381 | work->new_state = CMA_ADDR_RESOLVED; | |
1382 | work->event.event = RDMA_CM_EVENT_ROUTE_ERROR; | |
8f0472d3 | 1383 | work->event.status = status; |
e51060f0 SH |
1384 | } |
1385 | ||
1386 | queue_work(cma_wq, &work->work); | |
1387 | } | |
1388 | ||
1389 | static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms, | |
1390 | struct cma_work *work) | |
1391 | { | |
1392 | struct rdma_dev_addr *addr = &id_priv->id.route.addr.dev_addr; | |
1393 | struct ib_sa_path_rec path_rec; | |
1394 | ||
1395 | memset(&path_rec, 0, sizeof path_rec); | |
f0ee3404 MT |
1396 | ib_addr_get_sgid(addr, &path_rec.sgid); |
1397 | ib_addr_get_dgid(addr, &path_rec.dgid); | |
e51060f0 SH |
1398 | path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(addr)); |
1399 | path_rec.numb_path = 1; | |
1400 | ||
c1a0b23b | 1401 | id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device, |
e51060f0 SH |
1402 | id_priv->id.port_num, &path_rec, |
1403 | IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID | | |
1404 | IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH, | |
1405 | timeout_ms, GFP_KERNEL, | |
1406 | cma_query_handler, work, &id_priv->query); | |
1407 | ||
1408 | return (id_priv->query_id < 0) ? id_priv->query_id : 0; | |
1409 | } | |
1410 | ||
c4028958 | 1411 | static void cma_work_handler(struct work_struct *_work) |
e51060f0 | 1412 | { |
c4028958 | 1413 | struct cma_work *work = container_of(_work, struct cma_work, work); |
e51060f0 SH |
1414 | struct rdma_id_private *id_priv = work->id; |
1415 | int destroy = 0; | |
1416 | ||
1417 | atomic_inc(&id_priv->dev_remove); | |
1418 | if (!cma_comp_exch(id_priv, work->old_state, work->new_state)) | |
1419 | goto out; | |
1420 | ||
1421 | if (id_priv->id.event_handler(&id_priv->id, &work->event)) { | |
1422 | cma_exch(id_priv, CMA_DESTROYING); | |
1423 | destroy = 1; | |
1424 | } | |
1425 | out: | |
1426 | cma_release_remove(id_priv); | |
1427 | cma_deref_id(id_priv); | |
1428 | if (destroy) | |
1429 | rdma_destroy_id(&id_priv->id); | |
1430 | kfree(work); | |
1431 | } | |
1432 | ||
1433 | static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms) | |
1434 | { | |
1435 | struct rdma_route *route = &id_priv->id.route; | |
1436 | struct cma_work *work; | |
1437 | int ret; | |
1438 | ||
1439 | work = kzalloc(sizeof *work, GFP_KERNEL); | |
1440 | if (!work) | |
1441 | return -ENOMEM; | |
1442 | ||
1443 | work->id = id_priv; | |
c4028958 | 1444 | INIT_WORK(&work->work, cma_work_handler); |
e51060f0 SH |
1445 | work->old_state = CMA_ROUTE_QUERY; |
1446 | work->new_state = CMA_ROUTE_RESOLVED; | |
1447 | work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; | |
1448 | ||
1449 | route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL); | |
1450 | if (!route->path_rec) { | |
1451 | ret = -ENOMEM; | |
1452 | goto err1; | |
1453 | } | |
1454 | ||
1455 | ret = cma_query_ib_route(id_priv, timeout_ms, work); | |
1456 | if (ret) | |
1457 | goto err2; | |
1458 | ||
1459 | return 0; | |
1460 | err2: | |
1461 | kfree(route->path_rec); | |
1462 | route->path_rec = NULL; | |
1463 | err1: | |
1464 | kfree(work); | |
1465 | return ret; | |
1466 | } | |
1467 | ||
1468 | int rdma_set_ib_paths(struct rdma_cm_id *id, | |
1469 | struct ib_sa_path_rec *path_rec, int num_paths) | |
1470 | { | |
1471 | struct rdma_id_private *id_priv; | |
1472 | int ret; | |
1473 | ||
1474 | id_priv = container_of(id, struct rdma_id_private, id); | |
1475 | if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_RESOLVED)) | |
1476 | return -EINVAL; | |
1477 | ||
1478 | id->route.path_rec = kmalloc(sizeof *path_rec * num_paths, GFP_KERNEL); | |
1479 | if (!id->route.path_rec) { | |
1480 | ret = -ENOMEM; | |
1481 | goto err; | |
1482 | } | |
1483 | ||
1484 | memcpy(id->route.path_rec, path_rec, sizeof *path_rec * num_paths); | |
1485 | return 0; | |
1486 | err: | |
1487 | cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_ADDR_RESOLVED); | |
1488 | return ret; | |
1489 | } | |
1490 | EXPORT_SYMBOL(rdma_set_ib_paths); | |
1491 | ||
07ebafba TT |
1492 | static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms) |
1493 | { | |
1494 | struct cma_work *work; | |
1495 | ||
1496 | work = kzalloc(sizeof *work, GFP_KERNEL); | |
1497 | if (!work) | |
1498 | return -ENOMEM; | |
1499 | ||
1500 | work->id = id_priv; | |
c4028958 | 1501 | INIT_WORK(&work->work, cma_work_handler); |
07ebafba TT |
1502 | work->old_state = CMA_ROUTE_QUERY; |
1503 | work->new_state = CMA_ROUTE_RESOLVED; | |
1504 | work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; | |
1505 | queue_work(cma_wq, &work->work); | |
1506 | return 0; | |
1507 | } | |
1508 | ||
e51060f0 SH |
1509 | int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms) |
1510 | { | |
1511 | struct rdma_id_private *id_priv; | |
1512 | int ret; | |
1513 | ||
1514 | id_priv = container_of(id, struct rdma_id_private, id); | |
1515 | if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_QUERY)) | |
1516 | return -EINVAL; | |
1517 | ||
1518 | atomic_inc(&id_priv->refcount); | |
07ebafba TT |
1519 | switch (rdma_node_get_transport(id->device->node_type)) { |
1520 | case RDMA_TRANSPORT_IB: | |
e51060f0 SH |
1521 | ret = cma_resolve_ib_route(id_priv, timeout_ms); |
1522 | break; | |
07ebafba TT |
1523 | case RDMA_TRANSPORT_IWARP: |
1524 | ret = cma_resolve_iw_route(id_priv, timeout_ms); | |
1525 | break; | |
e51060f0 SH |
1526 | default: |
1527 | ret = -ENOSYS; | |
1528 | break; | |
1529 | } | |
1530 | if (ret) | |
1531 | goto err; | |
1532 | ||
1533 | return 0; | |
1534 | err: | |
1535 | cma_comp_exch(id_priv, CMA_ROUTE_QUERY, CMA_ADDR_RESOLVED); | |
1536 | cma_deref_id(id_priv); | |
1537 | return ret; | |
1538 | } | |
1539 | EXPORT_SYMBOL(rdma_resolve_route); | |
1540 | ||
1541 | static int cma_bind_loopback(struct rdma_id_private *id_priv) | |
1542 | { | |
1543 | struct cma_device *cma_dev; | |
1544 | struct ib_port_attr port_attr; | |
f0ee3404 | 1545 | union ib_gid gid; |
e51060f0 SH |
1546 | u16 pkey; |
1547 | int ret; | |
1548 | u8 p; | |
1549 | ||
1550 | mutex_lock(&lock); | |
e82153b5 KK |
1551 | if (list_empty(&dev_list)) { |
1552 | ret = -ENODEV; | |
1553 | goto out; | |
1554 | } | |
e51060f0 SH |
1555 | list_for_each_entry(cma_dev, &dev_list, list) |
1556 | for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p) | |
e82153b5 | 1557 | if (!ib_query_port(cma_dev->device, p, &port_attr) && |
e51060f0 SH |
1558 | port_attr.state == IB_PORT_ACTIVE) |
1559 | goto port_found; | |
1560 | ||
e82153b5 KK |
1561 | p = 1; |
1562 | cma_dev = list_entry(dev_list.next, struct cma_device, list); | |
e51060f0 SH |
1563 | |
1564 | port_found: | |
f0ee3404 | 1565 | ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid); |
e51060f0 SH |
1566 | if (ret) |
1567 | goto out; | |
1568 | ||
1569 | ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey); | |
1570 | if (ret) | |
1571 | goto out; | |
1572 | ||
f0ee3404 | 1573 | ib_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid); |
e51060f0 SH |
1574 | ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey); |
1575 | id_priv->id.port_num = p; | |
1576 | cma_attach_to_dev(id_priv, cma_dev); | |
1577 | out: | |
1578 | mutex_unlock(&lock); | |
1579 | return ret; | |
1580 | } | |
1581 | ||
1582 | static void addr_handler(int status, struct sockaddr *src_addr, | |
1583 | struct rdma_dev_addr *dev_addr, void *context) | |
1584 | { | |
1585 | struct rdma_id_private *id_priv = context; | |
a1b1b61f | 1586 | struct rdma_cm_event event; |
e51060f0 | 1587 | |
a1b1b61f | 1588 | memset(&event, 0, sizeof event); |
e51060f0 | 1589 | atomic_inc(&id_priv->dev_remove); |
61a73c70 SH |
1590 | |
1591 | /* | |
1592 | * Grab mutex to block rdma_destroy_id() from removing the device while | |
1593 | * we're trying to acquire it. | |
1594 | */ | |
1595 | mutex_lock(&lock); | |
1596 | if (!cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_RESOLVED)) { | |
1597 | mutex_unlock(&lock); | |
1598 | goto out; | |
1599 | } | |
1600 | ||
1601 | if (!status && !id_priv->cma_dev) | |
e51060f0 | 1602 | status = cma_acquire_dev(id_priv); |
61a73c70 | 1603 | mutex_unlock(&lock); |
e51060f0 SH |
1604 | |
1605 | if (status) { | |
61a73c70 | 1606 | if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ADDR_BOUND)) |
e51060f0 | 1607 | goto out; |
a1b1b61f SH |
1608 | event.event = RDMA_CM_EVENT_ADDR_ERROR; |
1609 | event.status = status; | |
e51060f0 | 1610 | } else { |
e51060f0 SH |
1611 | memcpy(&id_priv->id.route.addr.src_addr, src_addr, |
1612 | ip_addr_size(src_addr)); | |
a1b1b61f | 1613 | event.event = RDMA_CM_EVENT_ADDR_RESOLVED; |
e51060f0 SH |
1614 | } |
1615 | ||
a1b1b61f | 1616 | if (id_priv->id.event_handler(&id_priv->id, &event)) { |
e51060f0 SH |
1617 | cma_exch(id_priv, CMA_DESTROYING); |
1618 | cma_release_remove(id_priv); | |
1619 | cma_deref_id(id_priv); | |
1620 | rdma_destroy_id(&id_priv->id); | |
1621 | return; | |
1622 | } | |
1623 | out: | |
1624 | cma_release_remove(id_priv); | |
1625 | cma_deref_id(id_priv); | |
1626 | } | |
1627 | ||
1628 | static int cma_resolve_loopback(struct rdma_id_private *id_priv) | |
1629 | { | |
1630 | struct cma_work *work; | |
1631 | struct sockaddr_in *src_in, *dst_in; | |
f0ee3404 | 1632 | union ib_gid gid; |
e51060f0 SH |
1633 | int ret; |
1634 | ||
1635 | work = kzalloc(sizeof *work, GFP_KERNEL); | |
1636 | if (!work) | |
1637 | return -ENOMEM; | |
1638 | ||
1639 | if (!id_priv->cma_dev) { | |
1640 | ret = cma_bind_loopback(id_priv); | |
1641 | if (ret) | |
1642 | goto err; | |
1643 | } | |
1644 | ||
f0ee3404 MT |
1645 | ib_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid); |
1646 | ib_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid); | |
e51060f0 SH |
1647 | |
1648 | if (cma_zero_addr(&id_priv->id.route.addr.src_addr)) { | |
1649 | src_in = (struct sockaddr_in *)&id_priv->id.route.addr.src_addr; | |
1650 | dst_in = (struct sockaddr_in *)&id_priv->id.route.addr.dst_addr; | |
1651 | src_in->sin_family = dst_in->sin_family; | |
1652 | src_in->sin_addr.s_addr = dst_in->sin_addr.s_addr; | |
1653 | } | |
1654 | ||
1655 | work->id = id_priv; | |
c4028958 | 1656 | INIT_WORK(&work->work, cma_work_handler); |
e51060f0 SH |
1657 | work->old_state = CMA_ADDR_QUERY; |
1658 | work->new_state = CMA_ADDR_RESOLVED; | |
1659 | work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED; | |
1660 | queue_work(cma_wq, &work->work); | |
1661 | return 0; | |
1662 | err: | |
1663 | kfree(work); | |
1664 | return ret; | |
1665 | } | |
1666 | ||
1667 | static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, | |
1668 | struct sockaddr *dst_addr) | |
1669 | { | |
1670 | if (src_addr && src_addr->sa_family) | |
1671 | return rdma_bind_addr(id, src_addr); | |
1672 | else | |
1673 | return cma_bind_any(id, dst_addr->sa_family); | |
1674 | } | |
1675 | ||
1676 | int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, | |
1677 | struct sockaddr *dst_addr, int timeout_ms) | |
1678 | { | |
1679 | struct rdma_id_private *id_priv; | |
1680 | int ret; | |
1681 | ||
1682 | id_priv = container_of(id, struct rdma_id_private, id); | |
1683 | if (id_priv->state == CMA_IDLE) { | |
1684 | ret = cma_bind_addr(id, src_addr, dst_addr); | |
1685 | if (ret) | |
1686 | return ret; | |
1687 | } | |
1688 | ||
1689 | if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_ADDR_QUERY)) | |
1690 | return -EINVAL; | |
1691 | ||
1692 | atomic_inc(&id_priv->refcount); | |
1693 | memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr)); | |
1694 | if (cma_any_addr(dst_addr)) | |
1695 | ret = cma_resolve_loopback(id_priv); | |
1696 | else | |
7a118df3 SH |
1697 | ret = rdma_resolve_ip(&addr_client, &id->route.addr.src_addr, |
1698 | dst_addr, &id->route.addr.dev_addr, | |
e51060f0 SH |
1699 | timeout_ms, addr_handler, id_priv); |
1700 | if (ret) | |
1701 | goto err; | |
1702 | ||
1703 | return 0; | |
1704 | err: | |
1705 | cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_BOUND); | |
1706 | cma_deref_id(id_priv); | |
1707 | return ret; | |
1708 | } | |
1709 | EXPORT_SYMBOL(rdma_resolve_addr); | |
1710 | ||
1711 | static void cma_bind_port(struct rdma_bind_list *bind_list, | |
1712 | struct rdma_id_private *id_priv) | |
1713 | { | |
1714 | struct sockaddr_in *sin; | |
1715 | ||
1716 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; | |
1717 | sin->sin_port = htons(bind_list->port); | |
1718 | id_priv->bind_list = bind_list; | |
1719 | hlist_add_head(&id_priv->node, &bind_list->owners); | |
1720 | } | |
1721 | ||
1722 | static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv, | |
1723 | unsigned short snum) | |
1724 | { | |
1725 | struct rdma_bind_list *bind_list; | |
aedec080 | 1726 | int port, ret; |
e51060f0 SH |
1727 | |
1728 | bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL); | |
1729 | if (!bind_list) | |
1730 | return -ENOMEM; | |
1731 | ||
aedec080 SH |
1732 | do { |
1733 | ret = idr_get_new_above(ps, bind_list, snum, &port); | |
1734 | } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL)); | |
1735 | ||
1736 | if (ret) | |
1737 | goto err1; | |
1738 | ||
1739 | if (port != snum) { | |
1740 | ret = -EADDRNOTAVAIL; | |
1741 | goto err2; | |
1742 | } | |
1743 | ||
1744 | bind_list->ps = ps; | |
1745 | bind_list->port = (unsigned short) port; | |
1746 | cma_bind_port(bind_list, id_priv); | |
1747 | return 0; | |
1748 | err2: | |
1749 | idr_remove(ps, port); | |
1750 | err1: | |
1751 | kfree(bind_list); | |
1752 | return ret; | |
1753 | } | |
e51060f0 | 1754 | |
aedec080 SH |
1755 | static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv) |
1756 | { | |
1757 | struct rdma_bind_list *bind_list; | |
1758 | int port, ret; | |
1759 | ||
1760 | bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL); | |
1761 | if (!bind_list) | |
1762 | return -ENOMEM; | |
1763 | ||
1764 | retry: | |
e51060f0 | 1765 | do { |
aedec080 | 1766 | ret = idr_get_new_above(ps, bind_list, next_port, &port); |
e51060f0 SH |
1767 | } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL)); |
1768 | ||
1769 | if (ret) | |
aedec080 | 1770 | goto err1; |
e51060f0 | 1771 | |
aedec080 SH |
1772 | if (port > sysctl_local_port_range[1]) { |
1773 | if (next_port != sysctl_local_port_range[0]) { | |
1774 | idr_remove(ps, port); | |
1775 | next_port = sysctl_local_port_range[0]; | |
1776 | goto retry; | |
1777 | } | |
e51060f0 | 1778 | ret = -EADDRNOTAVAIL; |
aedec080 | 1779 | goto err2; |
e51060f0 SH |
1780 | } |
1781 | ||
aedec080 SH |
1782 | if (port == sysctl_local_port_range[1]) |
1783 | next_port = sysctl_local_port_range[0]; | |
1784 | else | |
1785 | next_port = port + 1; | |
1786 | ||
e51060f0 SH |
1787 | bind_list->ps = ps; |
1788 | bind_list->port = (unsigned short) port; | |
1789 | cma_bind_port(bind_list, id_priv); | |
1790 | return 0; | |
aedec080 SH |
1791 | err2: |
1792 | idr_remove(ps, port); | |
1793 | err1: | |
e51060f0 SH |
1794 | kfree(bind_list); |
1795 | return ret; | |
1796 | } | |
1797 | ||
1798 | static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv) | |
1799 | { | |
1800 | struct rdma_id_private *cur_id; | |
1801 | struct sockaddr_in *sin, *cur_sin; | |
1802 | struct rdma_bind_list *bind_list; | |
1803 | struct hlist_node *node; | |
1804 | unsigned short snum; | |
1805 | ||
1806 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; | |
1807 | snum = ntohs(sin->sin_port); | |
1808 | if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) | |
1809 | return -EACCES; | |
1810 | ||
1811 | bind_list = idr_find(ps, snum); | |
1812 | if (!bind_list) | |
1813 | return cma_alloc_port(ps, id_priv, snum); | |
1814 | ||
1815 | /* | |
1816 | * We don't support binding to any address if anyone is bound to | |
1817 | * a specific address on the same port. | |
1818 | */ | |
1819 | if (cma_any_addr(&id_priv->id.route.addr.src_addr)) | |
1820 | return -EADDRNOTAVAIL; | |
1821 | ||
1822 | hlist_for_each_entry(cur_id, node, &bind_list->owners, node) { | |
1823 | if (cma_any_addr(&cur_id->id.route.addr.src_addr)) | |
1824 | return -EADDRNOTAVAIL; | |
3cd96564 | 1825 | |
e51060f0 SH |
1826 | cur_sin = (struct sockaddr_in *) &cur_id->id.route.addr.src_addr; |
1827 | if (sin->sin_addr.s_addr == cur_sin->sin_addr.s_addr) | |
1828 | return -EADDRINUSE; | |
1829 | } | |
1830 | ||
1831 | cma_bind_port(bind_list, id_priv); | |
1832 | return 0; | |
1833 | } | |
1834 | ||
1835 | static int cma_get_port(struct rdma_id_private *id_priv) | |
1836 | { | |
1837 | struct idr *ps; | |
1838 | int ret; | |
1839 | ||
1840 | switch (id_priv->id.ps) { | |
1841 | case RDMA_PS_SDP: | |
1842 | ps = &sdp_ps; | |
1843 | break; | |
1844 | case RDMA_PS_TCP: | |
1845 | ps = &tcp_ps; | |
1846 | break; | |
628e5f6d SH |
1847 | case RDMA_PS_UDP: |
1848 | ps = &udp_ps; | |
1849 | break; | |
e51060f0 SH |
1850 | default: |
1851 | return -EPROTONOSUPPORT; | |
1852 | } | |
1853 | ||
1854 | mutex_lock(&lock); | |
1855 | if (cma_any_port(&id_priv->id.route.addr.src_addr)) | |
aedec080 | 1856 | ret = cma_alloc_any_port(ps, id_priv); |
e51060f0 SH |
1857 | else |
1858 | ret = cma_use_port(ps, id_priv); | |
1859 | mutex_unlock(&lock); | |
1860 | ||
1861 | return ret; | |
1862 | } | |
1863 | ||
1864 | int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr) | |
1865 | { | |
1866 | struct rdma_id_private *id_priv; | |
1867 | int ret; | |
1868 | ||
1869 | if (addr->sa_family != AF_INET) | |
1870 | return -EAFNOSUPPORT; | |
1871 | ||
1872 | id_priv = container_of(id, struct rdma_id_private, id); | |
1873 | if (!cma_comp_exch(id_priv, CMA_IDLE, CMA_ADDR_BOUND)) | |
1874 | return -EINVAL; | |
1875 | ||
1876 | if (!cma_any_addr(addr)) { | |
1877 | ret = rdma_translate_ip(addr, &id->route.addr.dev_addr); | |
e51060f0 | 1878 | if (ret) |
255d0c14 KK |
1879 | goto err1; |
1880 | ||
1881 | mutex_lock(&lock); | |
1882 | ret = cma_acquire_dev(id_priv); | |
1883 | mutex_unlock(&lock); | |
1884 | if (ret) | |
1885 | goto err1; | |
e51060f0 SH |
1886 | } |
1887 | ||
1888 | memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr)); | |
1889 | ret = cma_get_port(id_priv); | |
1890 | if (ret) | |
255d0c14 | 1891 | goto err2; |
e51060f0 SH |
1892 | |
1893 | return 0; | |
255d0c14 KK |
1894 | err2: |
1895 | if (!cma_any_addr(addr)) { | |
1896 | mutex_lock(&lock); | |
1897 | cma_detach_from_dev(id_priv); | |
1898 | mutex_unlock(&lock); | |
1899 | } | |
1900 | err1: | |
e51060f0 SH |
1901 | cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_IDLE); |
1902 | return ret; | |
1903 | } | |
1904 | EXPORT_SYMBOL(rdma_bind_addr); | |
1905 | ||
1906 | static int cma_format_hdr(void *hdr, enum rdma_port_space ps, | |
1907 | struct rdma_route *route) | |
1908 | { | |
1909 | struct sockaddr_in *src4, *dst4; | |
1910 | struct cma_hdr *cma_hdr; | |
1911 | struct sdp_hh *sdp_hdr; | |
1912 | ||
1913 | src4 = (struct sockaddr_in *) &route->addr.src_addr; | |
1914 | dst4 = (struct sockaddr_in *) &route->addr.dst_addr; | |
1915 | ||
1916 | switch (ps) { | |
1917 | case RDMA_PS_SDP: | |
1918 | sdp_hdr = hdr; | |
1919 | if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION) | |
1920 | return -EINVAL; | |
1921 | sdp_set_ip_ver(sdp_hdr, 4); | |
1922 | sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; | |
1923 | sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; | |
1924 | sdp_hdr->port = src4->sin_port; | |
1925 | break; | |
1926 | default: | |
1927 | cma_hdr = hdr; | |
1928 | cma_hdr->cma_version = CMA_VERSION; | |
1929 | cma_set_ip_ver(cma_hdr, 4); | |
1930 | cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; | |
1931 | cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; | |
1932 | cma_hdr->port = src4->sin_port; | |
1933 | break; | |
1934 | } | |
1935 | return 0; | |
1936 | } | |
1937 | ||
628e5f6d SH |
1938 | static int cma_sidr_rep_handler(struct ib_cm_id *cm_id, |
1939 | struct ib_cm_event *ib_event) | |
1940 | { | |
1941 | struct rdma_id_private *id_priv = cm_id->context; | |
1942 | struct rdma_cm_event event; | |
1943 | struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd; | |
1944 | int ret = 0; | |
1945 | ||
1946 | memset(&event, 0, sizeof event); | |
1947 | atomic_inc(&id_priv->dev_remove); | |
1948 | if (!cma_comp(id_priv, CMA_CONNECT)) | |
1949 | goto out; | |
1950 | ||
1951 | switch (ib_event->event) { | |
1952 | case IB_CM_SIDR_REQ_ERROR: | |
1953 | event.event = RDMA_CM_EVENT_UNREACHABLE; | |
1954 | event.status = -ETIMEDOUT; | |
1955 | break; | |
1956 | case IB_CM_SIDR_REP_RECEIVED: | |
1957 | event.param.ud.private_data = ib_event->private_data; | |
1958 | event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; | |
1959 | if (rep->status != IB_SIDR_SUCCESS) { | |
1960 | event.event = RDMA_CM_EVENT_UNREACHABLE; | |
1961 | event.status = ib_event->param.sidr_rep_rcvd.status; | |
1962 | break; | |
1963 | } | |
1964 | if (rep->qkey != RDMA_UD_QKEY) { | |
1965 | event.event = RDMA_CM_EVENT_UNREACHABLE; | |
1966 | event.status = -EINVAL; | |
1967 | break; | |
1968 | } | |
1969 | ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num, | |
1970 | id_priv->id.route.path_rec, | |
1971 | &event.param.ud.ah_attr); | |
1972 | event.param.ud.qp_num = rep->qpn; | |
1973 | event.param.ud.qkey = rep->qkey; | |
1974 | event.event = RDMA_CM_EVENT_ESTABLISHED; | |
1975 | event.status = 0; | |
1976 | break; | |
1977 | default: | |
1978 | printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d", | |
1979 | ib_event->event); | |
1980 | goto out; | |
1981 | } | |
1982 | ||
1983 | ret = id_priv->id.event_handler(&id_priv->id, &event); | |
1984 | if (ret) { | |
1985 | /* Destroy the CM ID by returning a non-zero value. */ | |
1986 | id_priv->cm_id.ib = NULL; | |
1987 | cma_exch(id_priv, CMA_DESTROYING); | |
1988 | cma_release_remove(id_priv); | |
1989 | rdma_destroy_id(&id_priv->id); | |
1990 | return ret; | |
1991 | } | |
1992 | out: | |
1993 | cma_release_remove(id_priv); | |
1994 | return ret; | |
1995 | } | |
1996 | ||
1997 | static int cma_resolve_ib_udp(struct rdma_id_private *id_priv, | |
1998 | struct rdma_conn_param *conn_param) | |
1999 | { | |
2000 | struct ib_cm_sidr_req_param req; | |
2001 | struct rdma_route *route; | |
2002 | int ret; | |
2003 | ||
2004 | req.private_data_len = sizeof(struct cma_hdr) + | |
2005 | conn_param->private_data_len; | |
2006 | req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC); | |
2007 | if (!req.private_data) | |
2008 | return -ENOMEM; | |
2009 | ||
2010 | if (conn_param->private_data && conn_param->private_data_len) | |
2011 | memcpy((void *) req.private_data + sizeof(struct cma_hdr), | |
2012 | conn_param->private_data, conn_param->private_data_len); | |
2013 | ||
2014 | route = &id_priv->id.route; | |
2015 | ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route); | |
2016 | if (ret) | |
2017 | goto out; | |
2018 | ||
2019 | id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, | |
2020 | cma_sidr_rep_handler, id_priv); | |
2021 | if (IS_ERR(id_priv->cm_id.ib)) { | |
2022 | ret = PTR_ERR(id_priv->cm_id.ib); | |
2023 | goto out; | |
2024 | } | |
2025 | ||
2026 | req.path = route->path_rec; | |
2027 | req.service_id = cma_get_service_id(id_priv->id.ps, | |
2028 | &route->addr.dst_addr); | |
2029 | req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8); | |
2030 | req.max_cm_retries = CMA_MAX_CM_RETRIES; | |
2031 | ||
2032 | ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req); | |
2033 | if (ret) { | |
2034 | ib_destroy_cm_id(id_priv->cm_id.ib); | |
2035 | id_priv->cm_id.ib = NULL; | |
2036 | } | |
2037 | out: | |
2038 | kfree(req.private_data); | |
2039 | return ret; | |
2040 | } | |
2041 | ||
e51060f0 SH |
2042 | static int cma_connect_ib(struct rdma_id_private *id_priv, |
2043 | struct rdma_conn_param *conn_param) | |
2044 | { | |
2045 | struct ib_cm_req_param req; | |
2046 | struct rdma_route *route; | |
2047 | void *private_data; | |
2048 | int offset, ret; | |
2049 | ||
2050 | memset(&req, 0, sizeof req); | |
2051 | offset = cma_user_data_offset(id_priv->id.ps); | |
2052 | req.private_data_len = offset + conn_param->private_data_len; | |
2053 | private_data = kzalloc(req.private_data_len, GFP_ATOMIC); | |
2054 | if (!private_data) | |
2055 | return -ENOMEM; | |
2056 | ||
2057 | if (conn_param->private_data && conn_param->private_data_len) | |
2058 | memcpy(private_data + offset, conn_param->private_data, | |
2059 | conn_param->private_data_len); | |
2060 | ||
2061 | id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_ib_handler, | |
2062 | id_priv); | |
2063 | if (IS_ERR(id_priv->cm_id.ib)) { | |
2064 | ret = PTR_ERR(id_priv->cm_id.ib); | |
2065 | goto out; | |
2066 | } | |
2067 | ||
2068 | route = &id_priv->id.route; | |
2069 | ret = cma_format_hdr(private_data, id_priv->id.ps, route); | |
2070 | if (ret) | |
2071 | goto out; | |
2072 | req.private_data = private_data; | |
2073 | ||
2074 | req.primary_path = &route->path_rec[0]; | |
2075 | if (route->num_paths == 2) | |
2076 | req.alternate_path = &route->path_rec[1]; | |
2077 | ||
2078 | req.service_id = cma_get_service_id(id_priv->id.ps, | |
2079 | &route->addr.dst_addr); | |
2080 | req.qp_num = id_priv->qp_num; | |
9b2e9c0c | 2081 | req.qp_type = IB_QPT_RC; |
e51060f0 SH |
2082 | req.starting_psn = id_priv->seq_num; |
2083 | req.responder_resources = conn_param->responder_resources; | |
2084 | req.initiator_depth = conn_param->initiator_depth; | |
2085 | req.flow_control = conn_param->flow_control; | |
2086 | req.retry_count = conn_param->retry_count; | |
2087 | req.rnr_retry_count = conn_param->rnr_retry_count; | |
2088 | req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; | |
2089 | req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; | |
2090 | req.max_cm_retries = CMA_MAX_CM_RETRIES; | |
2091 | req.srq = id_priv->srq ? 1 : 0; | |
2092 | ||
2093 | ret = ib_send_cm_req(id_priv->cm_id.ib, &req); | |
2094 | out: | |
675a027c KK |
2095 | if (ret && !IS_ERR(id_priv->cm_id.ib)) { |
2096 | ib_destroy_cm_id(id_priv->cm_id.ib); | |
2097 | id_priv->cm_id.ib = NULL; | |
2098 | } | |
2099 | ||
e51060f0 SH |
2100 | kfree(private_data); |
2101 | return ret; | |
2102 | } | |
2103 | ||
07ebafba TT |
2104 | static int cma_connect_iw(struct rdma_id_private *id_priv, |
2105 | struct rdma_conn_param *conn_param) | |
2106 | { | |
2107 | struct iw_cm_id *cm_id; | |
2108 | struct sockaddr_in* sin; | |
2109 | int ret; | |
2110 | struct iw_cm_conn_param iw_param; | |
2111 | ||
2112 | cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv); | |
2113 | if (IS_ERR(cm_id)) { | |
2114 | ret = PTR_ERR(cm_id); | |
2115 | goto out; | |
2116 | } | |
2117 | ||
2118 | id_priv->cm_id.iw = cm_id; | |
2119 | ||
2120 | sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr; | |
2121 | cm_id->local_addr = *sin; | |
2122 | ||
2123 | sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr; | |
2124 | cm_id->remote_addr = *sin; | |
2125 | ||
2126 | ret = cma_modify_qp_rtr(&id_priv->id); | |
675a027c KK |
2127 | if (ret) |
2128 | goto out; | |
07ebafba TT |
2129 | |
2130 | iw_param.ord = conn_param->initiator_depth; | |
2131 | iw_param.ird = conn_param->responder_resources; | |
2132 | iw_param.private_data = conn_param->private_data; | |
2133 | iw_param.private_data_len = conn_param->private_data_len; | |
2134 | if (id_priv->id.qp) | |
2135 | iw_param.qpn = id_priv->qp_num; | |
2136 | else | |
2137 | iw_param.qpn = conn_param->qp_num; | |
2138 | ret = iw_cm_connect(cm_id, &iw_param); | |
2139 | out: | |
675a027c KK |
2140 | if (ret && !IS_ERR(cm_id)) { |
2141 | iw_destroy_cm_id(cm_id); | |
2142 | id_priv->cm_id.iw = NULL; | |
2143 | } | |
07ebafba TT |
2144 | return ret; |
2145 | } | |
2146 | ||
e51060f0 SH |
2147 | int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) |
2148 | { | |
2149 | struct rdma_id_private *id_priv; | |
2150 | int ret; | |
2151 | ||
2152 | id_priv = container_of(id, struct rdma_id_private, id); | |
2153 | if (!cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_CONNECT)) | |
2154 | return -EINVAL; | |
2155 | ||
2156 | if (!id->qp) { | |
2157 | id_priv->qp_num = conn_param->qp_num; | |
e51060f0 SH |
2158 | id_priv->srq = conn_param->srq; |
2159 | } | |
2160 | ||
07ebafba TT |
2161 | switch (rdma_node_get_transport(id->device->node_type)) { |
2162 | case RDMA_TRANSPORT_IB: | |
628e5f6d SH |
2163 | if (id->ps == RDMA_PS_UDP) |
2164 | ret = cma_resolve_ib_udp(id_priv, conn_param); | |
2165 | else | |
2166 | ret = cma_connect_ib(id_priv, conn_param); | |
e51060f0 | 2167 | break; |
07ebafba TT |
2168 | case RDMA_TRANSPORT_IWARP: |
2169 | ret = cma_connect_iw(id_priv, conn_param); | |
2170 | break; | |
e51060f0 SH |
2171 | default: |
2172 | ret = -ENOSYS; | |
2173 | break; | |
2174 | } | |
2175 | if (ret) | |
2176 | goto err; | |
2177 | ||
2178 | return 0; | |
2179 | err: | |
2180 | cma_comp_exch(id_priv, CMA_CONNECT, CMA_ROUTE_RESOLVED); | |
2181 | return ret; | |
2182 | } | |
2183 | EXPORT_SYMBOL(rdma_connect); | |
2184 | ||
2185 | static int cma_accept_ib(struct rdma_id_private *id_priv, | |
2186 | struct rdma_conn_param *conn_param) | |
2187 | { | |
2188 | struct ib_cm_rep_param rep; | |
0fe313b0 SH |
2189 | struct ib_qp_attr qp_attr; |
2190 | int qp_attr_mask, ret; | |
e51060f0 | 2191 | |
0fe313b0 SH |
2192 | if (id_priv->id.qp) { |
2193 | ret = cma_modify_qp_rtr(&id_priv->id); | |
2194 | if (ret) | |
2195 | goto out; | |
2196 | ||
2197 | qp_attr.qp_state = IB_QPS_RTS; | |
2198 | ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, &qp_attr, | |
2199 | &qp_attr_mask); | |
2200 | if (ret) | |
2201 | goto out; | |
2202 | ||
2203 | qp_attr.max_rd_atomic = conn_param->initiator_depth; | |
2204 | ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); | |
2205 | if (ret) | |
2206 | goto out; | |
2207 | } | |
e51060f0 SH |
2208 | |
2209 | memset(&rep, 0, sizeof rep); | |
2210 | rep.qp_num = id_priv->qp_num; | |
2211 | rep.starting_psn = id_priv->seq_num; | |
2212 | rep.private_data = conn_param->private_data; | |
2213 | rep.private_data_len = conn_param->private_data_len; | |
2214 | rep.responder_resources = conn_param->responder_resources; | |
2215 | rep.initiator_depth = conn_param->initiator_depth; | |
2216 | rep.target_ack_delay = CMA_CM_RESPONSE_TIMEOUT; | |
2217 | rep.failover_accepted = 0; | |
2218 | rep.flow_control = conn_param->flow_control; | |
2219 | rep.rnr_retry_count = conn_param->rnr_retry_count; | |
2220 | rep.srq = id_priv->srq ? 1 : 0; | |
2221 | ||
0fe313b0 SH |
2222 | ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep); |
2223 | out: | |
2224 | return ret; | |
e51060f0 SH |
2225 | } |
2226 | ||
07ebafba TT |
2227 | static int cma_accept_iw(struct rdma_id_private *id_priv, |
2228 | struct rdma_conn_param *conn_param) | |
2229 | { | |
2230 | struct iw_cm_conn_param iw_param; | |
2231 | int ret; | |
2232 | ||
2233 | ret = cma_modify_qp_rtr(&id_priv->id); | |
2234 | if (ret) | |
2235 | return ret; | |
2236 | ||
2237 | iw_param.ord = conn_param->initiator_depth; | |
2238 | iw_param.ird = conn_param->responder_resources; | |
2239 | iw_param.private_data = conn_param->private_data; | |
2240 | iw_param.private_data_len = conn_param->private_data_len; | |
2241 | if (id_priv->id.qp) { | |
2242 | iw_param.qpn = id_priv->qp_num; | |
2243 | } else | |
2244 | iw_param.qpn = conn_param->qp_num; | |
2245 | ||
2246 | return iw_cm_accept(id_priv->cm_id.iw, &iw_param); | |
2247 | } | |
2248 | ||
628e5f6d SH |
2249 | static int cma_send_sidr_rep(struct rdma_id_private *id_priv, |
2250 | enum ib_cm_sidr_status status, | |
2251 | const void *private_data, int private_data_len) | |
2252 | { | |
2253 | struct ib_cm_sidr_rep_param rep; | |
2254 | ||
2255 | memset(&rep, 0, sizeof rep); | |
2256 | rep.status = status; | |
2257 | if (status == IB_SIDR_SUCCESS) { | |
2258 | rep.qp_num = id_priv->qp_num; | |
2259 | rep.qkey = RDMA_UD_QKEY; | |
2260 | } | |
2261 | rep.private_data = private_data; | |
2262 | rep.private_data_len = private_data_len; | |
2263 | ||
2264 | return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep); | |
2265 | } | |
2266 | ||
e51060f0 SH |
2267 | int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) |
2268 | { | |
2269 | struct rdma_id_private *id_priv; | |
2270 | int ret; | |
2271 | ||
2272 | id_priv = container_of(id, struct rdma_id_private, id); | |
2273 | if (!cma_comp(id_priv, CMA_CONNECT)) | |
2274 | return -EINVAL; | |
2275 | ||
2276 | if (!id->qp && conn_param) { | |
2277 | id_priv->qp_num = conn_param->qp_num; | |
e51060f0 SH |
2278 | id_priv->srq = conn_param->srq; |
2279 | } | |
2280 | ||
07ebafba TT |
2281 | switch (rdma_node_get_transport(id->device->node_type)) { |
2282 | case RDMA_TRANSPORT_IB: | |
628e5f6d SH |
2283 | if (id->ps == RDMA_PS_UDP) |
2284 | ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS, | |
2285 | conn_param->private_data, | |
2286 | conn_param->private_data_len); | |
2287 | else if (conn_param) | |
e51060f0 SH |
2288 | ret = cma_accept_ib(id_priv, conn_param); |
2289 | else | |
2290 | ret = cma_rep_recv(id_priv); | |
2291 | break; | |
07ebafba TT |
2292 | case RDMA_TRANSPORT_IWARP: |
2293 | ret = cma_accept_iw(id_priv, conn_param); | |
2294 | break; | |
e51060f0 SH |
2295 | default: |
2296 | ret = -ENOSYS; | |
2297 | break; | |
2298 | } | |
2299 | ||
2300 | if (ret) | |
2301 | goto reject; | |
2302 | ||
2303 | return 0; | |
2304 | reject: | |
2305 | cma_modify_qp_err(id); | |
2306 | rdma_reject(id, NULL, 0); | |
2307 | return ret; | |
2308 | } | |
2309 | EXPORT_SYMBOL(rdma_accept); | |
2310 | ||
0fe313b0 SH |
2311 | int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event) |
2312 | { | |
2313 | struct rdma_id_private *id_priv; | |
2314 | int ret; | |
2315 | ||
2316 | id_priv = container_of(id, struct rdma_id_private, id); | |
2317 | if (!cma_comp(id_priv, CMA_CONNECT)) | |
2318 | return -EINVAL; | |
2319 | ||
2320 | switch (id->device->node_type) { | |
2321 | case RDMA_NODE_IB_CA: | |
2322 | ret = ib_cm_notify(id_priv->cm_id.ib, event); | |
2323 | break; | |
2324 | default: | |
2325 | ret = 0; | |
2326 | break; | |
2327 | } | |
2328 | return ret; | |
2329 | } | |
2330 | EXPORT_SYMBOL(rdma_notify); | |
2331 | ||
e51060f0 SH |
2332 | int rdma_reject(struct rdma_cm_id *id, const void *private_data, |
2333 | u8 private_data_len) | |
2334 | { | |
2335 | struct rdma_id_private *id_priv; | |
2336 | int ret; | |
2337 | ||
2338 | id_priv = container_of(id, struct rdma_id_private, id); | |
2339 | if (!cma_comp(id_priv, CMA_CONNECT)) | |
2340 | return -EINVAL; | |
2341 | ||
07ebafba TT |
2342 | switch (rdma_node_get_transport(id->device->node_type)) { |
2343 | case RDMA_TRANSPORT_IB: | |
628e5f6d SH |
2344 | if (id->ps == RDMA_PS_UDP) |
2345 | ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, | |
2346 | private_data, private_data_len); | |
2347 | else | |
2348 | ret = ib_send_cm_rej(id_priv->cm_id.ib, | |
2349 | IB_CM_REJ_CONSUMER_DEFINED, NULL, | |
2350 | 0, private_data, private_data_len); | |
e51060f0 | 2351 | break; |
07ebafba TT |
2352 | case RDMA_TRANSPORT_IWARP: |
2353 | ret = iw_cm_reject(id_priv->cm_id.iw, | |
2354 | private_data, private_data_len); | |
2355 | break; | |
e51060f0 SH |
2356 | default: |
2357 | ret = -ENOSYS; | |
2358 | break; | |
2359 | } | |
2360 | return ret; | |
2361 | } | |
2362 | EXPORT_SYMBOL(rdma_reject); | |
2363 | ||
2364 | int rdma_disconnect(struct rdma_cm_id *id) | |
2365 | { | |
2366 | struct rdma_id_private *id_priv; | |
2367 | int ret; | |
2368 | ||
2369 | id_priv = container_of(id, struct rdma_id_private, id); | |
2370 | if (!cma_comp(id_priv, CMA_CONNECT) && | |
2371 | !cma_comp(id_priv, CMA_DISCONNECT)) | |
2372 | return -EINVAL; | |
2373 | ||
07ebafba TT |
2374 | switch (rdma_node_get_transport(id->device->node_type)) { |
2375 | case RDMA_TRANSPORT_IB: | |
2376 | ret = cma_modify_qp_err(id); | |
2377 | if (ret) | |
2378 | goto out; | |
e51060f0 SH |
2379 | /* Initiate or respond to a disconnect. */ |
2380 | if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0)) | |
2381 | ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0); | |
2382 | break; | |
07ebafba TT |
2383 | case RDMA_TRANSPORT_IWARP: |
2384 | ret = iw_cm_disconnect(id_priv->cm_id.iw, 0); | |
2385 | break; | |
e51060f0 | 2386 | default: |
07ebafba | 2387 | ret = -EINVAL; |
e51060f0 SH |
2388 | break; |
2389 | } | |
2390 | out: | |
2391 | return ret; | |
2392 | } | |
2393 | EXPORT_SYMBOL(rdma_disconnect); | |
2394 | ||
2395 | static void cma_add_one(struct ib_device *device) | |
2396 | { | |
2397 | struct cma_device *cma_dev; | |
2398 | struct rdma_id_private *id_priv; | |
2399 | ||
2400 | cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL); | |
2401 | if (!cma_dev) | |
2402 | return; | |
2403 | ||
2404 | cma_dev->device = device; | |
2405 | cma_dev->node_guid = device->node_guid; | |
e51060f0 SH |
2406 | |
2407 | init_completion(&cma_dev->comp); | |
2408 | atomic_set(&cma_dev->refcount, 1); | |
2409 | INIT_LIST_HEAD(&cma_dev->id_list); | |
2410 | ib_set_client_data(device, &cma_client, cma_dev); | |
2411 | ||
2412 | mutex_lock(&lock); | |
2413 | list_add_tail(&cma_dev->list, &dev_list); | |
2414 | list_for_each_entry(id_priv, &listen_any_list, list) | |
2415 | cma_listen_on_dev(id_priv, cma_dev); | |
2416 | mutex_unlock(&lock); | |
e51060f0 SH |
2417 | } |
2418 | ||
2419 | static int cma_remove_id_dev(struct rdma_id_private *id_priv) | |
2420 | { | |
a1b1b61f | 2421 | struct rdma_cm_event event; |
e51060f0 SH |
2422 | enum cma_state state; |
2423 | ||
2424 | /* Record that we want to remove the device */ | |
2425 | state = cma_exch(id_priv, CMA_DEVICE_REMOVAL); | |
2426 | if (state == CMA_DESTROYING) | |
2427 | return 0; | |
2428 | ||
2429 | cma_cancel_operation(id_priv, state); | |
2430 | wait_event(id_priv->wait_remove, !atomic_read(&id_priv->dev_remove)); | |
2431 | ||
2432 | /* Check for destruction from another callback. */ | |
2433 | if (!cma_comp(id_priv, CMA_DEVICE_REMOVAL)) | |
2434 | return 0; | |
2435 | ||
a1b1b61f SH |
2436 | memset(&event, 0, sizeof event); |
2437 | event.event = RDMA_CM_EVENT_DEVICE_REMOVAL; | |
2438 | return id_priv->id.event_handler(&id_priv->id, &event); | |
e51060f0 SH |
2439 | } |
2440 | ||
2441 | static void cma_process_remove(struct cma_device *cma_dev) | |
2442 | { | |
e51060f0 SH |
2443 | struct rdma_id_private *id_priv; |
2444 | int ret; | |
2445 | ||
e51060f0 SH |
2446 | mutex_lock(&lock); |
2447 | while (!list_empty(&cma_dev->id_list)) { | |
2448 | id_priv = list_entry(cma_dev->id_list.next, | |
2449 | struct rdma_id_private, list); | |
2450 | ||
2451 | if (cma_internal_listen(id_priv)) { | |
2452 | cma_destroy_listen(id_priv); | |
2453 | continue; | |
2454 | } | |
2455 | ||
94de178a | 2456 | list_del_init(&id_priv->list); |
e51060f0 SH |
2457 | atomic_inc(&id_priv->refcount); |
2458 | mutex_unlock(&lock); | |
2459 | ||
2460 | ret = cma_remove_id_dev(id_priv); | |
2461 | cma_deref_id(id_priv); | |
2462 | if (ret) | |
2463 | rdma_destroy_id(&id_priv->id); | |
2464 | ||
2465 | mutex_lock(&lock); | |
2466 | } | |
2467 | mutex_unlock(&lock); | |
2468 | ||
2469 | cma_deref_dev(cma_dev); | |
2470 | wait_for_completion(&cma_dev->comp); | |
2471 | } | |
2472 | ||
2473 | static void cma_remove_one(struct ib_device *device) | |
2474 | { | |
2475 | struct cma_device *cma_dev; | |
2476 | ||
2477 | cma_dev = ib_get_client_data(device, &cma_client); | |
2478 | if (!cma_dev) | |
2479 | return; | |
2480 | ||
2481 | mutex_lock(&lock); | |
2482 | list_del(&cma_dev->list); | |
2483 | mutex_unlock(&lock); | |
2484 | ||
2485 | cma_process_remove(cma_dev); | |
2486 | kfree(cma_dev); | |
2487 | } | |
2488 | ||
2489 | static int cma_init(void) | |
2490 | { | |
2491 | int ret; | |
2492 | ||
aedec080 SH |
2493 | get_random_bytes(&next_port, sizeof next_port); |
2494 | next_port = (next_port % (sysctl_local_port_range[1] - | |
2495 | sysctl_local_port_range[0])) + | |
2496 | sysctl_local_port_range[0]; | |
c7f743a6 | 2497 | cma_wq = create_singlethread_workqueue("rdma_cm"); |
e51060f0 SH |
2498 | if (!cma_wq) |
2499 | return -ENOMEM; | |
2500 | ||
c1a0b23b | 2501 | ib_sa_register_client(&sa_client); |
7a118df3 | 2502 | rdma_addr_register_client(&addr_client); |
c1a0b23b | 2503 | |
e51060f0 SH |
2504 | ret = ib_register_client(&cma_client); |
2505 | if (ret) | |
2506 | goto err; | |
2507 | return 0; | |
2508 | ||
2509 | err: | |
7a118df3 | 2510 | rdma_addr_unregister_client(&addr_client); |
c1a0b23b | 2511 | ib_sa_unregister_client(&sa_client); |
e51060f0 SH |
2512 | destroy_workqueue(cma_wq); |
2513 | return ret; | |
2514 | } | |
2515 | ||
2516 | static void cma_cleanup(void) | |
2517 | { | |
2518 | ib_unregister_client(&cma_client); | |
7a118df3 | 2519 | rdma_addr_unregister_client(&addr_client); |
c1a0b23b | 2520 | ib_sa_unregister_client(&sa_client); |
e51060f0 SH |
2521 | destroy_workqueue(cma_wq); |
2522 | idr_destroy(&sdp_ps); | |
2523 | idr_destroy(&tcp_ps); | |
628e5f6d | 2524 | idr_destroy(&udp_ps); |
e51060f0 SH |
2525 | } |
2526 | ||
2527 | module_init(cma_init); | |
2528 | module_exit(cma_cleanup); |