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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); | |
73 | ||
74 | struct cma_device { | |
75 | struct list_head list; | |
76 | struct ib_device *device; | |
77 | __be64 node_guid; | |
78 | struct completion comp; | |
79 | atomic_t refcount; | |
80 | struct list_head id_list; | |
81 | }; | |
82 | ||
83 | enum cma_state { | |
84 | CMA_IDLE, | |
85 | CMA_ADDR_QUERY, | |
86 | CMA_ADDR_RESOLVED, | |
87 | CMA_ROUTE_QUERY, | |
88 | CMA_ROUTE_RESOLVED, | |
89 | CMA_CONNECT, | |
90 | CMA_DISCONNECT, | |
91 | CMA_ADDR_BOUND, | |
92 | CMA_LISTEN, | |
93 | CMA_DEVICE_REMOVAL, | |
94 | CMA_DESTROYING | |
95 | }; | |
96 | ||
97 | struct rdma_bind_list { | |
98 | struct idr *ps; | |
99 | struct hlist_head owners; | |
100 | unsigned short port; | |
101 | }; | |
102 | ||
103 | /* | |
104 | * Device removal can occur at anytime, so we need extra handling to | |
105 | * serialize notifying the user of device removal with other callbacks. | |
106 | * We do this by disabling removal notification while a callback is in process, | |
107 | * and reporting it after the callback completes. | |
108 | */ | |
109 | struct rdma_id_private { | |
110 | struct rdma_cm_id id; | |
111 | ||
112 | struct rdma_bind_list *bind_list; | |
113 | struct hlist_node node; | |
114 | struct list_head list; | |
115 | struct list_head listen_list; | |
116 | struct cma_device *cma_dev; | |
117 | ||
118 | enum cma_state state; | |
119 | spinlock_t lock; | |
120 | struct completion comp; | |
121 | atomic_t refcount; | |
122 | wait_queue_head_t wait_remove; | |
123 | atomic_t dev_remove; | |
124 | ||
125 | int backlog; | |
126 | int timeout_ms; | |
127 | struct ib_sa_query *query; | |
128 | int query_id; | |
129 | union { | |
130 | struct ib_cm_id *ib; | |
07ebafba | 131 | struct iw_cm_id *iw; |
e51060f0 SH |
132 | } cm_id; |
133 | ||
134 | u32 seq_num; | |
135 | u32 qp_num; | |
136 | enum ib_qp_type qp_type; | |
137 | u8 srq; | |
138 | }; | |
139 | ||
140 | struct cma_work { | |
141 | struct work_struct work; | |
142 | struct rdma_id_private *id; | |
143 | enum cma_state old_state; | |
144 | enum cma_state new_state; | |
145 | struct rdma_cm_event event; | |
146 | }; | |
147 | ||
148 | union cma_ip_addr { | |
149 | struct in6_addr ip6; | |
150 | struct { | |
151 | __u32 pad[3]; | |
152 | __u32 addr; | |
153 | } ip4; | |
154 | }; | |
155 | ||
156 | struct cma_hdr { | |
157 | u8 cma_version; | |
158 | u8 ip_version; /* IP version: 7:4 */ | |
159 | __u16 port; | |
160 | union cma_ip_addr src_addr; | |
161 | union cma_ip_addr dst_addr; | |
162 | }; | |
163 | ||
164 | struct sdp_hh { | |
165 | u8 bsdh[16]; | |
166 | u8 sdp_version; /* Major version: 7:4 */ | |
167 | u8 ip_version; /* IP version: 7:4 */ | |
168 | u8 sdp_specific1[10]; | |
169 | __u16 port; | |
170 | __u16 sdp_specific2; | |
171 | union cma_ip_addr src_addr; | |
172 | union cma_ip_addr dst_addr; | |
173 | }; | |
174 | ||
175 | struct sdp_hah { | |
176 | u8 bsdh[16]; | |
177 | u8 sdp_version; | |
178 | }; | |
179 | ||
180 | #define CMA_VERSION 0x00 | |
181 | #define SDP_MAJ_VERSION 0x2 | |
182 | ||
183 | static int cma_comp(struct rdma_id_private *id_priv, enum cma_state comp) | |
184 | { | |
185 | unsigned long flags; | |
186 | int ret; | |
187 | ||
188 | spin_lock_irqsave(&id_priv->lock, flags); | |
189 | ret = (id_priv->state == comp); | |
190 | spin_unlock_irqrestore(&id_priv->lock, flags); | |
191 | return ret; | |
192 | } | |
193 | ||
194 | static int cma_comp_exch(struct rdma_id_private *id_priv, | |
195 | enum cma_state comp, enum cma_state exch) | |
196 | { | |
197 | unsigned long flags; | |
198 | int ret; | |
199 | ||
200 | spin_lock_irqsave(&id_priv->lock, flags); | |
201 | if ((ret = (id_priv->state == comp))) | |
202 | id_priv->state = exch; | |
203 | spin_unlock_irqrestore(&id_priv->lock, flags); | |
204 | return ret; | |
205 | } | |
206 | ||
207 | static enum cma_state cma_exch(struct rdma_id_private *id_priv, | |
208 | enum cma_state exch) | |
209 | { | |
210 | unsigned long flags; | |
211 | enum cma_state old; | |
212 | ||
213 | spin_lock_irqsave(&id_priv->lock, flags); | |
214 | old = id_priv->state; | |
215 | id_priv->state = exch; | |
216 | spin_unlock_irqrestore(&id_priv->lock, flags); | |
217 | return old; | |
218 | } | |
219 | ||
220 | static inline u8 cma_get_ip_ver(struct cma_hdr *hdr) | |
221 | { | |
222 | return hdr->ip_version >> 4; | |
223 | } | |
224 | ||
225 | static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver) | |
226 | { | |
227 | hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF); | |
228 | } | |
229 | ||
230 | static inline u8 sdp_get_majv(u8 sdp_version) | |
231 | { | |
232 | return sdp_version >> 4; | |
233 | } | |
234 | ||
235 | static inline u8 sdp_get_ip_ver(struct sdp_hh *hh) | |
236 | { | |
237 | return hh->ip_version >> 4; | |
238 | } | |
239 | ||
240 | static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver) | |
241 | { | |
242 | hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF); | |
243 | } | |
244 | ||
245 | static void cma_attach_to_dev(struct rdma_id_private *id_priv, | |
246 | struct cma_device *cma_dev) | |
247 | { | |
248 | atomic_inc(&cma_dev->refcount); | |
249 | id_priv->cma_dev = cma_dev; | |
250 | id_priv->id.device = cma_dev->device; | |
251 | list_add_tail(&id_priv->list, &cma_dev->id_list); | |
252 | } | |
253 | ||
254 | static inline void cma_deref_dev(struct cma_device *cma_dev) | |
255 | { | |
256 | if (atomic_dec_and_test(&cma_dev->refcount)) | |
257 | complete(&cma_dev->comp); | |
258 | } | |
259 | ||
260 | static void cma_detach_from_dev(struct rdma_id_private *id_priv) | |
261 | { | |
262 | list_del(&id_priv->list); | |
263 | cma_deref_dev(id_priv->cma_dev); | |
264 | id_priv->cma_dev = NULL; | |
265 | } | |
266 | ||
07ebafba | 267 | static int cma_acquire_dev(struct rdma_id_private *id_priv) |
e51060f0 | 268 | { |
07ebafba | 269 | enum rdma_node_type dev_type = id_priv->id.route.addr.dev_addr.dev_type; |
e51060f0 | 270 | struct cma_device *cma_dev; |
f0ee3404 | 271 | union ib_gid gid; |
e51060f0 SH |
272 | int ret = -ENODEV; |
273 | ||
07ebafba TT |
274 | switch (rdma_node_get_transport(dev_type)) { |
275 | case RDMA_TRANSPORT_IB: | |
276 | ib_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid); | |
277 | break; | |
278 | case RDMA_TRANSPORT_IWARP: | |
279 | iw_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid); | |
280 | break; | |
281 | default: | |
282 | return -ENODEV; | |
283 | } | |
61a73c70 | 284 | |
e51060f0 | 285 | list_for_each_entry(cma_dev, &dev_list, list) { |
f0ee3404 | 286 | ret = ib_find_cached_gid(cma_dev->device, &gid, |
e51060f0 SH |
287 | &id_priv->id.port_num, NULL); |
288 | if (!ret) { | |
289 | cma_attach_to_dev(id_priv, cma_dev); | |
290 | break; | |
291 | } | |
292 | } | |
e51060f0 SH |
293 | return ret; |
294 | } | |
295 | ||
e51060f0 SH |
296 | static void cma_deref_id(struct rdma_id_private *id_priv) |
297 | { | |
298 | if (atomic_dec_and_test(&id_priv->refcount)) | |
299 | complete(&id_priv->comp); | |
300 | } | |
301 | ||
302 | static void cma_release_remove(struct rdma_id_private *id_priv) | |
303 | { | |
304 | if (atomic_dec_and_test(&id_priv->dev_remove)) | |
305 | wake_up(&id_priv->wait_remove); | |
306 | } | |
307 | ||
308 | struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler, | |
309 | void *context, enum rdma_port_space ps) | |
310 | { | |
311 | struct rdma_id_private *id_priv; | |
312 | ||
313 | id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL); | |
314 | if (!id_priv) | |
315 | return ERR_PTR(-ENOMEM); | |
316 | ||
317 | id_priv->state = CMA_IDLE; | |
318 | id_priv->id.context = context; | |
319 | id_priv->id.event_handler = event_handler; | |
320 | id_priv->id.ps = ps; | |
321 | spin_lock_init(&id_priv->lock); | |
322 | init_completion(&id_priv->comp); | |
323 | atomic_set(&id_priv->refcount, 1); | |
324 | init_waitqueue_head(&id_priv->wait_remove); | |
325 | atomic_set(&id_priv->dev_remove, 0); | |
326 | INIT_LIST_HEAD(&id_priv->listen_list); | |
327 | get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num); | |
328 | ||
329 | return &id_priv->id; | |
330 | } | |
331 | EXPORT_SYMBOL(rdma_create_id); | |
332 | ||
333 | static int cma_init_ib_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) | |
334 | { | |
335 | struct ib_qp_attr qp_attr; | |
336 | struct rdma_dev_addr *dev_addr; | |
337 | int ret; | |
338 | ||
339 | dev_addr = &id_priv->id.route.addr.dev_addr; | |
340 | ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num, | |
341 | ib_addr_get_pkey(dev_addr), | |
342 | &qp_attr.pkey_index); | |
343 | if (ret) | |
344 | return ret; | |
345 | ||
346 | qp_attr.qp_state = IB_QPS_INIT; | |
347 | qp_attr.qp_access_flags = IB_ACCESS_LOCAL_WRITE; | |
348 | qp_attr.port_num = id_priv->id.port_num; | |
349 | return ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_ACCESS_FLAGS | | |
350 | IB_QP_PKEY_INDEX | IB_QP_PORT); | |
351 | } | |
352 | ||
07ebafba TT |
353 | static int cma_init_iw_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) |
354 | { | |
355 | struct ib_qp_attr qp_attr; | |
356 | ||
357 | qp_attr.qp_state = IB_QPS_INIT; | |
358 | qp_attr.qp_access_flags = IB_ACCESS_LOCAL_WRITE; | |
359 | ||
360 | return ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_ACCESS_FLAGS); | |
361 | } | |
362 | ||
e51060f0 SH |
363 | int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd, |
364 | struct ib_qp_init_attr *qp_init_attr) | |
365 | { | |
366 | struct rdma_id_private *id_priv; | |
367 | struct ib_qp *qp; | |
368 | int ret; | |
369 | ||
370 | id_priv = container_of(id, struct rdma_id_private, id); | |
371 | if (id->device != pd->device) | |
372 | return -EINVAL; | |
373 | ||
374 | qp = ib_create_qp(pd, qp_init_attr); | |
375 | if (IS_ERR(qp)) | |
376 | return PTR_ERR(qp); | |
377 | ||
07ebafba TT |
378 | switch (rdma_node_get_transport(id->device->node_type)) { |
379 | case RDMA_TRANSPORT_IB: | |
e51060f0 SH |
380 | ret = cma_init_ib_qp(id_priv, qp); |
381 | break; | |
07ebafba TT |
382 | case RDMA_TRANSPORT_IWARP: |
383 | ret = cma_init_iw_qp(id_priv, qp); | |
384 | break; | |
e51060f0 SH |
385 | default: |
386 | ret = -ENOSYS; | |
387 | break; | |
388 | } | |
389 | ||
390 | if (ret) | |
391 | goto err; | |
392 | ||
393 | id->qp = qp; | |
394 | id_priv->qp_num = qp->qp_num; | |
395 | id_priv->qp_type = qp->qp_type; | |
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 | ||
513 | static inline int cma_any_port(struct sockaddr *addr) | |
514 | { | |
515 | return !((struct sockaddr_in *) addr)->sin_port; | |
516 | } | |
517 | ||
518 | static int cma_get_net_info(void *hdr, enum rdma_port_space ps, | |
519 | u8 *ip_ver, __u16 *port, | |
520 | union cma_ip_addr **src, union cma_ip_addr **dst) | |
521 | { | |
522 | switch (ps) { | |
523 | case RDMA_PS_SDP: | |
524 | if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) != | |
525 | SDP_MAJ_VERSION) | |
526 | return -EINVAL; | |
527 | ||
528 | *ip_ver = sdp_get_ip_ver(hdr); | |
529 | *port = ((struct sdp_hh *) hdr)->port; | |
530 | *src = &((struct sdp_hh *) hdr)->src_addr; | |
531 | *dst = &((struct sdp_hh *) hdr)->dst_addr; | |
532 | break; | |
533 | default: | |
534 | if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION) | |
535 | return -EINVAL; | |
536 | ||
537 | *ip_ver = cma_get_ip_ver(hdr); | |
538 | *port = ((struct cma_hdr *) hdr)->port; | |
539 | *src = &((struct cma_hdr *) hdr)->src_addr; | |
540 | *dst = &((struct cma_hdr *) hdr)->dst_addr; | |
541 | break; | |
542 | } | |
543 | ||
544 | if (*ip_ver != 4 && *ip_ver != 6) | |
545 | return -EINVAL; | |
546 | return 0; | |
547 | } | |
548 | ||
549 | static void cma_save_net_info(struct rdma_addr *addr, | |
550 | struct rdma_addr *listen_addr, | |
551 | u8 ip_ver, __u16 port, | |
552 | union cma_ip_addr *src, union cma_ip_addr *dst) | |
553 | { | |
554 | struct sockaddr_in *listen4, *ip4; | |
555 | struct sockaddr_in6 *listen6, *ip6; | |
556 | ||
557 | switch (ip_ver) { | |
558 | case 4: | |
559 | listen4 = (struct sockaddr_in *) &listen_addr->src_addr; | |
560 | ip4 = (struct sockaddr_in *) &addr->src_addr; | |
561 | ip4->sin_family = listen4->sin_family; | |
562 | ip4->sin_addr.s_addr = dst->ip4.addr; | |
563 | ip4->sin_port = listen4->sin_port; | |
564 | ||
565 | ip4 = (struct sockaddr_in *) &addr->dst_addr; | |
566 | ip4->sin_family = listen4->sin_family; | |
567 | ip4->sin_addr.s_addr = src->ip4.addr; | |
568 | ip4->sin_port = port; | |
569 | break; | |
570 | case 6: | |
571 | listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr; | |
572 | ip6 = (struct sockaddr_in6 *) &addr->src_addr; | |
573 | ip6->sin6_family = listen6->sin6_family; | |
574 | ip6->sin6_addr = dst->ip6; | |
575 | ip6->sin6_port = listen6->sin6_port; | |
576 | ||
577 | ip6 = (struct sockaddr_in6 *) &addr->dst_addr; | |
578 | ip6->sin6_family = listen6->sin6_family; | |
579 | ip6->sin6_addr = src->ip6; | |
580 | ip6->sin6_port = port; | |
581 | break; | |
582 | default: | |
583 | break; | |
584 | } | |
585 | } | |
586 | ||
587 | static inline int cma_user_data_offset(enum rdma_port_space ps) | |
588 | { | |
589 | switch (ps) { | |
590 | case RDMA_PS_SDP: | |
591 | return 0; | |
592 | default: | |
593 | return sizeof(struct cma_hdr); | |
594 | } | |
595 | } | |
596 | ||
597 | static int cma_notify_user(struct rdma_id_private *id_priv, | |
598 | enum rdma_cm_event_type type, int status, | |
599 | void *data, u8 data_len) | |
600 | { | |
601 | struct rdma_cm_event event; | |
602 | ||
603 | event.event = type; | |
604 | event.status = status; | |
605 | event.private_data = data; | |
606 | event.private_data_len = data_len; | |
607 | ||
608 | return id_priv->id.event_handler(&id_priv->id, &event); | |
609 | } | |
610 | ||
611 | static void cma_cancel_route(struct rdma_id_private *id_priv) | |
612 | { | |
07ebafba TT |
613 | switch (rdma_node_get_transport(id_priv->id.device->node_type)) { |
614 | case RDMA_TRANSPORT_IB: | |
e51060f0 SH |
615 | if (id_priv->query) |
616 | ib_sa_cancel_query(id_priv->query_id, id_priv->query); | |
617 | break; | |
618 | default: | |
619 | break; | |
620 | } | |
621 | } | |
622 | ||
623 | static inline int cma_internal_listen(struct rdma_id_private *id_priv) | |
624 | { | |
625 | return (id_priv->state == CMA_LISTEN) && id_priv->cma_dev && | |
626 | cma_any_addr(&id_priv->id.route.addr.src_addr); | |
627 | } | |
628 | ||
629 | static void cma_destroy_listen(struct rdma_id_private *id_priv) | |
630 | { | |
631 | cma_exch(id_priv, CMA_DESTROYING); | |
632 | ||
633 | if (id_priv->cma_dev) { | |
07ebafba TT |
634 | switch (rdma_node_get_transport(id_priv->id.device->node_type)) { |
635 | case RDMA_TRANSPORT_IB: | |
3cd96564 | 636 | if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib)) |
e51060f0 SH |
637 | ib_destroy_cm_id(id_priv->cm_id.ib); |
638 | break; | |
07ebafba TT |
639 | case RDMA_TRANSPORT_IWARP: |
640 | if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw)) | |
641 | iw_destroy_cm_id(id_priv->cm_id.iw); | |
642 | break; | |
e51060f0 SH |
643 | default: |
644 | break; | |
645 | } | |
646 | cma_detach_from_dev(id_priv); | |
647 | } | |
648 | list_del(&id_priv->listen_list); | |
649 | ||
650 | cma_deref_id(id_priv); | |
651 | wait_for_completion(&id_priv->comp); | |
652 | ||
653 | kfree(id_priv); | |
654 | } | |
655 | ||
656 | static void cma_cancel_listens(struct rdma_id_private *id_priv) | |
657 | { | |
658 | struct rdma_id_private *dev_id_priv; | |
659 | ||
660 | mutex_lock(&lock); | |
661 | list_del(&id_priv->list); | |
662 | ||
663 | while (!list_empty(&id_priv->listen_list)) { | |
664 | dev_id_priv = list_entry(id_priv->listen_list.next, | |
665 | struct rdma_id_private, listen_list); | |
666 | cma_destroy_listen(dev_id_priv); | |
667 | } | |
668 | mutex_unlock(&lock); | |
669 | } | |
670 | ||
671 | static void cma_cancel_operation(struct rdma_id_private *id_priv, | |
672 | enum cma_state state) | |
673 | { | |
674 | switch (state) { | |
675 | case CMA_ADDR_QUERY: | |
676 | rdma_addr_cancel(&id_priv->id.route.addr.dev_addr); | |
677 | break; | |
678 | case CMA_ROUTE_QUERY: | |
679 | cma_cancel_route(id_priv); | |
680 | break; | |
681 | case CMA_LISTEN: | |
682 | if (cma_any_addr(&id_priv->id.route.addr.src_addr) && | |
683 | !id_priv->cma_dev) | |
684 | cma_cancel_listens(id_priv); | |
685 | break; | |
686 | default: | |
687 | break; | |
688 | } | |
689 | } | |
690 | ||
691 | static void cma_release_port(struct rdma_id_private *id_priv) | |
692 | { | |
693 | struct rdma_bind_list *bind_list = id_priv->bind_list; | |
694 | ||
695 | if (!bind_list) | |
696 | return; | |
697 | ||
698 | mutex_lock(&lock); | |
699 | hlist_del(&id_priv->node); | |
700 | if (hlist_empty(&bind_list->owners)) { | |
701 | idr_remove(bind_list->ps, bind_list->port); | |
702 | kfree(bind_list); | |
703 | } | |
704 | mutex_unlock(&lock); | |
705 | } | |
706 | ||
707 | void rdma_destroy_id(struct rdma_cm_id *id) | |
708 | { | |
709 | struct rdma_id_private *id_priv; | |
710 | enum cma_state state; | |
711 | ||
712 | id_priv = container_of(id, struct rdma_id_private, id); | |
713 | state = cma_exch(id_priv, CMA_DESTROYING); | |
714 | cma_cancel_operation(id_priv, state); | |
715 | ||
61a73c70 | 716 | mutex_lock(&lock); |
e51060f0 | 717 | if (id_priv->cma_dev) { |
61a73c70 | 718 | mutex_unlock(&lock); |
07ebafba TT |
719 | switch (rdma_node_get_transport(id->device->node_type)) { |
720 | case RDMA_TRANSPORT_IB: | |
3cd96564 | 721 | if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib)) |
e51060f0 SH |
722 | ib_destroy_cm_id(id_priv->cm_id.ib); |
723 | break; | |
07ebafba TT |
724 | case RDMA_TRANSPORT_IWARP: |
725 | if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw)) | |
726 | iw_destroy_cm_id(id_priv->cm_id.iw); | |
727 | break; | |
e51060f0 SH |
728 | default: |
729 | break; | |
730 | } | |
3cd96564 | 731 | mutex_lock(&lock); |
e51060f0 | 732 | cma_detach_from_dev(id_priv); |
e51060f0 | 733 | } |
61a73c70 | 734 | mutex_unlock(&lock); |
e51060f0 SH |
735 | |
736 | cma_release_port(id_priv); | |
737 | cma_deref_id(id_priv); | |
738 | wait_for_completion(&id_priv->comp); | |
739 | ||
740 | kfree(id_priv->id.route.path_rec); | |
741 | kfree(id_priv); | |
742 | } | |
743 | EXPORT_SYMBOL(rdma_destroy_id); | |
744 | ||
745 | static int cma_rep_recv(struct rdma_id_private *id_priv) | |
746 | { | |
747 | int ret; | |
748 | ||
749 | ret = cma_modify_qp_rtr(&id_priv->id); | |
750 | if (ret) | |
751 | goto reject; | |
752 | ||
753 | ret = cma_modify_qp_rts(&id_priv->id); | |
754 | if (ret) | |
755 | goto reject; | |
756 | ||
757 | ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0); | |
758 | if (ret) | |
759 | goto reject; | |
760 | ||
761 | return 0; | |
762 | reject: | |
763 | cma_modify_qp_err(&id_priv->id); | |
764 | ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED, | |
765 | NULL, 0, NULL, 0); | |
766 | return ret; | |
767 | } | |
768 | ||
769 | static int cma_verify_rep(struct rdma_id_private *id_priv, void *data) | |
770 | { | |
771 | if (id_priv->id.ps == RDMA_PS_SDP && | |
772 | sdp_get_majv(((struct sdp_hah *) data)->sdp_version) != | |
773 | SDP_MAJ_VERSION) | |
774 | return -EINVAL; | |
775 | ||
776 | return 0; | |
777 | } | |
778 | ||
779 | static int cma_rtu_recv(struct rdma_id_private *id_priv) | |
780 | { | |
781 | int ret; | |
782 | ||
783 | ret = cma_modify_qp_rts(&id_priv->id); | |
784 | if (ret) | |
785 | goto reject; | |
786 | ||
787 | return 0; | |
788 | reject: | |
789 | cma_modify_qp_err(&id_priv->id); | |
790 | ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED, | |
791 | NULL, 0, NULL, 0); | |
792 | return ret; | |
793 | } | |
794 | ||
795 | static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) | |
796 | { | |
797 | struct rdma_id_private *id_priv = cm_id->context; | |
798 | enum rdma_cm_event_type event; | |
799 | u8 private_data_len = 0; | |
800 | int ret = 0, status = 0; | |
801 | ||
802 | atomic_inc(&id_priv->dev_remove); | |
803 | if (!cma_comp(id_priv, CMA_CONNECT)) | |
804 | goto out; | |
805 | ||
806 | switch (ib_event->event) { | |
807 | case IB_CM_REQ_ERROR: | |
808 | case IB_CM_REP_ERROR: | |
809 | event = RDMA_CM_EVENT_UNREACHABLE; | |
810 | status = -ETIMEDOUT; | |
811 | break; | |
812 | case IB_CM_REP_RECEIVED: | |
813 | status = cma_verify_rep(id_priv, ib_event->private_data); | |
814 | if (status) | |
815 | event = RDMA_CM_EVENT_CONNECT_ERROR; | |
816 | else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) { | |
817 | status = cma_rep_recv(id_priv); | |
818 | event = status ? RDMA_CM_EVENT_CONNECT_ERROR : | |
819 | RDMA_CM_EVENT_ESTABLISHED; | |
820 | } else | |
821 | event = RDMA_CM_EVENT_CONNECT_RESPONSE; | |
822 | private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE; | |
823 | break; | |
824 | case IB_CM_RTU_RECEIVED: | |
825 | status = cma_rtu_recv(id_priv); | |
826 | event = status ? RDMA_CM_EVENT_CONNECT_ERROR : | |
827 | RDMA_CM_EVENT_ESTABLISHED; | |
828 | break; | |
829 | case IB_CM_DREQ_ERROR: | |
830 | status = -ETIMEDOUT; /* fall through */ | |
831 | case IB_CM_DREQ_RECEIVED: | |
832 | case IB_CM_DREP_RECEIVED: | |
833 | if (!cma_comp_exch(id_priv, CMA_CONNECT, CMA_DISCONNECT)) | |
834 | goto out; | |
835 | event = RDMA_CM_EVENT_DISCONNECTED; | |
836 | break; | |
837 | case IB_CM_TIMEWAIT_EXIT: | |
838 | case IB_CM_MRA_RECEIVED: | |
839 | /* ignore event */ | |
840 | goto out; | |
841 | case IB_CM_REJ_RECEIVED: | |
842 | cma_modify_qp_err(&id_priv->id); | |
843 | status = ib_event->param.rej_rcvd.reason; | |
844 | event = RDMA_CM_EVENT_REJECTED; | |
74f76fba | 845 | private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; |
e51060f0 SH |
846 | break; |
847 | default: | |
848 | printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d", | |
849 | ib_event->event); | |
850 | goto out; | |
851 | } | |
852 | ||
853 | ret = cma_notify_user(id_priv, event, status, ib_event->private_data, | |
854 | private_data_len); | |
855 | if (ret) { | |
856 | /* Destroy the CM ID by returning a non-zero value. */ | |
857 | id_priv->cm_id.ib = NULL; | |
858 | cma_exch(id_priv, CMA_DESTROYING); | |
859 | cma_release_remove(id_priv); | |
860 | rdma_destroy_id(&id_priv->id); | |
861 | return ret; | |
862 | } | |
863 | out: | |
864 | cma_release_remove(id_priv); | |
865 | return ret; | |
866 | } | |
867 | ||
868 | static struct rdma_id_private *cma_new_id(struct rdma_cm_id *listen_id, | |
869 | struct ib_cm_event *ib_event) | |
870 | { | |
871 | struct rdma_id_private *id_priv; | |
872 | struct rdma_cm_id *id; | |
873 | struct rdma_route *rt; | |
874 | union cma_ip_addr *src, *dst; | |
875 | __u16 port; | |
876 | u8 ip_ver; | |
877 | ||
3f168d2b KK |
878 | if (cma_get_net_info(ib_event->private_data, listen_id->ps, |
879 | &ip_ver, &port, &src, &dst)) | |
880 | goto err; | |
881 | ||
e51060f0 SH |
882 | id = rdma_create_id(listen_id->event_handler, listen_id->context, |
883 | listen_id->ps); | |
884 | if (IS_ERR(id)) | |
3f168d2b KK |
885 | goto err; |
886 | ||
887 | cma_save_net_info(&id->route.addr, &listen_id->route.addr, | |
888 | ip_ver, port, src, dst); | |
e51060f0 SH |
889 | |
890 | rt = &id->route; | |
891 | rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1; | |
3f168d2b KK |
892 | rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths, |
893 | GFP_KERNEL); | |
e51060f0 | 894 | if (!rt->path_rec) |
3f168d2b | 895 | goto destroy_id; |
e51060f0 | 896 | |
e51060f0 SH |
897 | rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path; |
898 | if (rt->num_paths == 2) | |
899 | rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path; | |
900 | ||
901 | ib_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid); | |
902 | ib_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid); | |
903 | ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey)); | |
07ebafba | 904 | rt->addr.dev_addr.dev_type = RDMA_NODE_IB_CA; |
e51060f0 SH |
905 | |
906 | id_priv = container_of(id, struct rdma_id_private, id); | |
907 | id_priv->state = CMA_CONNECT; | |
908 | return id_priv; | |
3f168d2b KK |
909 | |
910 | destroy_id: | |
e51060f0 | 911 | rdma_destroy_id(id); |
3f168d2b | 912 | err: |
e51060f0 SH |
913 | return NULL; |
914 | } | |
915 | ||
916 | static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) | |
917 | { | |
918 | struct rdma_id_private *listen_id, *conn_id; | |
919 | int offset, ret; | |
920 | ||
921 | listen_id = cm_id->context; | |
922 | atomic_inc(&listen_id->dev_remove); | |
923 | if (!cma_comp(listen_id, CMA_LISTEN)) { | |
924 | ret = -ECONNABORTED; | |
925 | goto out; | |
926 | } | |
927 | ||
928 | conn_id = cma_new_id(&listen_id->id, ib_event); | |
929 | if (!conn_id) { | |
930 | ret = -ENOMEM; | |
931 | goto out; | |
932 | } | |
933 | ||
934 | atomic_inc(&conn_id->dev_remove); | |
61a73c70 | 935 | mutex_lock(&lock); |
07ebafba | 936 | ret = cma_acquire_dev(conn_id); |
61a73c70 | 937 | mutex_unlock(&lock); |
e51060f0 SH |
938 | if (ret) { |
939 | ret = -ENODEV; | |
6e35aabe | 940 | cma_exch(conn_id, CMA_DESTROYING); |
e51060f0 SH |
941 | cma_release_remove(conn_id); |
942 | rdma_destroy_id(&conn_id->id); | |
943 | goto out; | |
944 | } | |
945 | ||
946 | conn_id->cm_id.ib = cm_id; | |
947 | cm_id->context = conn_id; | |
948 | cm_id->cm_handler = cma_ib_handler; | |
949 | ||
950 | offset = cma_user_data_offset(listen_id->id.ps); | |
951 | ret = cma_notify_user(conn_id, RDMA_CM_EVENT_CONNECT_REQUEST, 0, | |
952 | ib_event->private_data + offset, | |
953 | IB_CM_REQ_PRIVATE_DATA_SIZE - offset); | |
954 | if (ret) { | |
955 | /* Destroy the CM ID by returning a non-zero value. */ | |
956 | conn_id->cm_id.ib = NULL; | |
957 | cma_exch(conn_id, CMA_DESTROYING); | |
958 | cma_release_remove(conn_id); | |
959 | rdma_destroy_id(&conn_id->id); | |
960 | } | |
961 | out: | |
962 | cma_release_remove(listen_id); | |
963 | return ret; | |
964 | } | |
965 | ||
966 | static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr) | |
967 | { | |
968 | return cpu_to_be64(((u64)ps << 16) + | |
969 | be16_to_cpu(((struct sockaddr_in *) addr)->sin_port)); | |
970 | } | |
971 | ||
972 | static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr, | |
973 | struct ib_cm_compare_data *compare) | |
974 | { | |
975 | struct cma_hdr *cma_data, *cma_mask; | |
976 | struct sdp_hh *sdp_data, *sdp_mask; | |
977 | __u32 ip4_addr; | |
978 | struct in6_addr ip6_addr; | |
979 | ||
980 | memset(compare, 0, sizeof *compare); | |
981 | cma_data = (void *) compare->data; | |
982 | cma_mask = (void *) compare->mask; | |
983 | sdp_data = (void *) compare->data; | |
984 | sdp_mask = (void *) compare->mask; | |
985 | ||
986 | switch (addr->sa_family) { | |
987 | case AF_INET: | |
988 | ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr; | |
989 | if (ps == RDMA_PS_SDP) { | |
990 | sdp_set_ip_ver(sdp_data, 4); | |
991 | sdp_set_ip_ver(sdp_mask, 0xF); | |
992 | sdp_data->dst_addr.ip4.addr = ip4_addr; | |
993 | sdp_mask->dst_addr.ip4.addr = ~0; | |
994 | } else { | |
995 | cma_set_ip_ver(cma_data, 4); | |
996 | cma_set_ip_ver(cma_mask, 0xF); | |
997 | cma_data->dst_addr.ip4.addr = ip4_addr; | |
998 | cma_mask->dst_addr.ip4.addr = ~0; | |
999 | } | |
1000 | break; | |
1001 | case AF_INET6: | |
1002 | ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr; | |
1003 | if (ps == RDMA_PS_SDP) { | |
1004 | sdp_set_ip_ver(sdp_data, 6); | |
1005 | sdp_set_ip_ver(sdp_mask, 0xF); | |
1006 | sdp_data->dst_addr.ip6 = ip6_addr; | |
1007 | memset(&sdp_mask->dst_addr.ip6, 0xFF, | |
1008 | sizeof sdp_mask->dst_addr.ip6); | |
1009 | } else { | |
1010 | cma_set_ip_ver(cma_data, 6); | |
1011 | cma_set_ip_ver(cma_mask, 0xF); | |
1012 | cma_data->dst_addr.ip6 = ip6_addr; | |
1013 | memset(&cma_mask->dst_addr.ip6, 0xFF, | |
1014 | sizeof cma_mask->dst_addr.ip6); | |
1015 | } | |
1016 | break; | |
1017 | default: | |
1018 | break; | |
1019 | } | |
1020 | } | |
1021 | ||
07ebafba TT |
1022 | static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event) |
1023 | { | |
1024 | struct rdma_id_private *id_priv = iw_id->context; | |
1025 | enum rdma_cm_event_type event = 0; | |
1026 | struct sockaddr_in *sin; | |
1027 | int ret = 0; | |
1028 | ||
1029 | atomic_inc(&id_priv->dev_remove); | |
1030 | ||
1031 | switch (iw_event->event) { | |
1032 | case IW_CM_EVENT_CLOSE: | |
1033 | event = RDMA_CM_EVENT_DISCONNECTED; | |
1034 | break; | |
1035 | case IW_CM_EVENT_CONNECT_REPLY: | |
1036 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; | |
1037 | *sin = iw_event->local_addr; | |
1038 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr; | |
1039 | *sin = iw_event->remote_addr; | |
1040 | if (iw_event->status) | |
1041 | event = RDMA_CM_EVENT_REJECTED; | |
1042 | else | |
1043 | event = RDMA_CM_EVENT_ESTABLISHED; | |
1044 | break; | |
1045 | case IW_CM_EVENT_ESTABLISHED: | |
1046 | event = RDMA_CM_EVENT_ESTABLISHED; | |
1047 | break; | |
1048 | default: | |
1049 | BUG_ON(1); | |
1050 | } | |
1051 | ||
1052 | ret = cma_notify_user(id_priv, event, iw_event->status, | |
1053 | iw_event->private_data, | |
1054 | iw_event->private_data_len); | |
1055 | if (ret) { | |
1056 | /* Destroy the CM ID by returning a non-zero value. */ | |
1057 | id_priv->cm_id.iw = NULL; | |
1058 | cma_exch(id_priv, CMA_DESTROYING); | |
1059 | cma_release_remove(id_priv); | |
1060 | rdma_destroy_id(&id_priv->id); | |
1061 | return ret; | |
1062 | } | |
1063 | ||
1064 | cma_release_remove(id_priv); | |
1065 | return ret; | |
1066 | } | |
1067 | ||
1068 | static int iw_conn_req_handler(struct iw_cm_id *cm_id, | |
1069 | struct iw_cm_event *iw_event) | |
1070 | { | |
1071 | struct rdma_cm_id *new_cm_id; | |
1072 | struct rdma_id_private *listen_id, *conn_id; | |
1073 | struct sockaddr_in *sin; | |
1074 | struct net_device *dev = NULL; | |
1075 | int ret; | |
1076 | ||
1077 | listen_id = cm_id->context; | |
1078 | atomic_inc(&listen_id->dev_remove); | |
1079 | if (!cma_comp(listen_id, CMA_LISTEN)) { | |
1080 | ret = -ECONNABORTED; | |
1081 | goto out; | |
1082 | } | |
1083 | ||
1084 | /* Create a new RDMA id for the new IW CM ID */ | |
1085 | new_cm_id = rdma_create_id(listen_id->id.event_handler, | |
1086 | listen_id->id.context, | |
1087 | RDMA_PS_TCP); | |
1088 | if (!new_cm_id) { | |
1089 | ret = -ENOMEM; | |
1090 | goto out; | |
1091 | } | |
1092 | conn_id = container_of(new_cm_id, struct rdma_id_private, id); | |
1093 | atomic_inc(&conn_id->dev_remove); | |
1094 | conn_id->state = CMA_CONNECT; | |
1095 | ||
1096 | dev = ip_dev_find(iw_event->local_addr.sin_addr.s_addr); | |
1097 | if (!dev) { | |
1098 | ret = -EADDRNOTAVAIL; | |
1099 | cma_release_remove(conn_id); | |
1100 | rdma_destroy_id(new_cm_id); | |
1101 | goto out; | |
1102 | } | |
1103 | ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL); | |
1104 | if (ret) { | |
1105 | cma_release_remove(conn_id); | |
1106 | rdma_destroy_id(new_cm_id); | |
1107 | goto out; | |
1108 | } | |
1109 | ||
61a73c70 | 1110 | mutex_lock(&lock); |
07ebafba | 1111 | ret = cma_acquire_dev(conn_id); |
61a73c70 | 1112 | mutex_unlock(&lock); |
07ebafba TT |
1113 | if (ret) { |
1114 | cma_release_remove(conn_id); | |
1115 | rdma_destroy_id(new_cm_id); | |
1116 | goto out; | |
1117 | } | |
1118 | ||
1119 | conn_id->cm_id.iw = cm_id; | |
1120 | cm_id->context = conn_id; | |
1121 | cm_id->cm_handler = cma_iw_handler; | |
1122 | ||
1123 | sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr; | |
1124 | *sin = iw_event->local_addr; | |
1125 | sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr; | |
1126 | *sin = iw_event->remote_addr; | |
1127 | ||
1128 | ret = cma_notify_user(conn_id, RDMA_CM_EVENT_CONNECT_REQUEST, 0, | |
1129 | iw_event->private_data, | |
1130 | iw_event->private_data_len); | |
1131 | if (ret) { | |
1132 | /* User wants to destroy the CM ID */ | |
1133 | conn_id->cm_id.iw = NULL; | |
1134 | cma_exch(conn_id, CMA_DESTROYING); | |
1135 | cma_release_remove(conn_id); | |
1136 | rdma_destroy_id(&conn_id->id); | |
1137 | } | |
1138 | ||
1139 | out: | |
1140 | if (dev) | |
1141 | dev_put(dev); | |
1142 | cma_release_remove(listen_id); | |
1143 | return ret; | |
1144 | } | |
1145 | ||
e51060f0 SH |
1146 | static int cma_ib_listen(struct rdma_id_private *id_priv) |
1147 | { | |
1148 | struct ib_cm_compare_data compare_data; | |
1149 | struct sockaddr *addr; | |
1150 | __be64 svc_id; | |
1151 | int ret; | |
1152 | ||
1153 | id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_req_handler, | |
1154 | id_priv); | |
1155 | if (IS_ERR(id_priv->cm_id.ib)) | |
1156 | return PTR_ERR(id_priv->cm_id.ib); | |
1157 | ||
1158 | addr = &id_priv->id.route.addr.src_addr; | |
1159 | svc_id = cma_get_service_id(id_priv->id.ps, addr); | |
1160 | if (cma_any_addr(addr)) | |
1161 | ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL); | |
1162 | else { | |
1163 | cma_set_compare_data(id_priv->id.ps, addr, &compare_data); | |
1164 | ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data); | |
1165 | } | |
1166 | ||
1167 | if (ret) { | |
1168 | ib_destroy_cm_id(id_priv->cm_id.ib); | |
1169 | id_priv->cm_id.ib = NULL; | |
1170 | } | |
1171 | ||
1172 | return ret; | |
1173 | } | |
1174 | ||
07ebafba TT |
1175 | static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog) |
1176 | { | |
1177 | int ret; | |
1178 | struct sockaddr_in *sin; | |
1179 | ||
1180 | id_priv->cm_id.iw = iw_create_cm_id(id_priv->id.device, | |
1181 | iw_conn_req_handler, | |
1182 | id_priv); | |
1183 | if (IS_ERR(id_priv->cm_id.iw)) | |
1184 | return PTR_ERR(id_priv->cm_id.iw); | |
1185 | ||
1186 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; | |
1187 | id_priv->cm_id.iw->local_addr = *sin; | |
1188 | ||
1189 | ret = iw_cm_listen(id_priv->cm_id.iw, backlog); | |
1190 | ||
1191 | if (ret) { | |
1192 | iw_destroy_cm_id(id_priv->cm_id.iw); | |
1193 | id_priv->cm_id.iw = NULL; | |
1194 | } | |
1195 | ||
1196 | return ret; | |
1197 | } | |
1198 | ||
e51060f0 SH |
1199 | static int cma_listen_handler(struct rdma_cm_id *id, |
1200 | struct rdma_cm_event *event) | |
1201 | { | |
1202 | struct rdma_id_private *id_priv = id->context; | |
1203 | ||
1204 | id->context = id_priv->id.context; | |
1205 | id->event_handler = id_priv->id.event_handler; | |
1206 | return id_priv->id.event_handler(id, event); | |
1207 | } | |
1208 | ||
1209 | static void cma_listen_on_dev(struct rdma_id_private *id_priv, | |
1210 | struct cma_device *cma_dev) | |
1211 | { | |
1212 | struct rdma_id_private *dev_id_priv; | |
1213 | struct rdma_cm_id *id; | |
1214 | int ret; | |
1215 | ||
1216 | id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps); | |
1217 | if (IS_ERR(id)) | |
1218 | return; | |
1219 | ||
1220 | dev_id_priv = container_of(id, struct rdma_id_private, id); | |
1221 | ||
1222 | dev_id_priv->state = CMA_ADDR_BOUND; | |
1223 | memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr, | |
1224 | ip_addr_size(&id_priv->id.route.addr.src_addr)); | |
1225 | ||
1226 | cma_attach_to_dev(dev_id_priv, cma_dev); | |
1227 | list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list); | |
1228 | ||
1229 | ret = rdma_listen(id, id_priv->backlog); | |
1230 | if (ret) | |
1231 | goto err; | |
1232 | ||
1233 | return; | |
1234 | err: | |
1235 | cma_destroy_listen(dev_id_priv); | |
1236 | } | |
1237 | ||
1238 | static void cma_listen_on_all(struct rdma_id_private *id_priv) | |
1239 | { | |
1240 | struct cma_device *cma_dev; | |
1241 | ||
1242 | mutex_lock(&lock); | |
1243 | list_add_tail(&id_priv->list, &listen_any_list); | |
1244 | list_for_each_entry(cma_dev, &dev_list, list) | |
1245 | cma_listen_on_dev(id_priv, cma_dev); | |
1246 | mutex_unlock(&lock); | |
1247 | } | |
1248 | ||
1249 | static int cma_bind_any(struct rdma_cm_id *id, sa_family_t af) | |
1250 | { | |
1251 | struct sockaddr_in addr_in; | |
1252 | ||
1253 | memset(&addr_in, 0, sizeof addr_in); | |
1254 | addr_in.sin_family = af; | |
1255 | return rdma_bind_addr(id, (struct sockaddr *) &addr_in); | |
1256 | } | |
1257 | ||
1258 | int rdma_listen(struct rdma_cm_id *id, int backlog) | |
1259 | { | |
1260 | struct rdma_id_private *id_priv; | |
1261 | int ret; | |
1262 | ||
1263 | id_priv = container_of(id, struct rdma_id_private, id); | |
1264 | if (id_priv->state == CMA_IDLE) { | |
1265 | ret = cma_bind_any(id, AF_INET); | |
1266 | if (ret) | |
1267 | return ret; | |
1268 | } | |
1269 | ||
1270 | if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_LISTEN)) | |
1271 | return -EINVAL; | |
1272 | ||
1273 | id_priv->backlog = backlog; | |
1274 | if (id->device) { | |
07ebafba TT |
1275 | switch (rdma_node_get_transport(id->device->node_type)) { |
1276 | case RDMA_TRANSPORT_IB: | |
e51060f0 SH |
1277 | ret = cma_ib_listen(id_priv); |
1278 | if (ret) | |
1279 | goto err; | |
1280 | break; | |
07ebafba TT |
1281 | case RDMA_TRANSPORT_IWARP: |
1282 | ret = cma_iw_listen(id_priv, backlog); | |
1283 | if (ret) | |
1284 | goto err; | |
1285 | break; | |
e51060f0 SH |
1286 | default: |
1287 | ret = -ENOSYS; | |
1288 | goto err; | |
1289 | } | |
1290 | } else | |
1291 | cma_listen_on_all(id_priv); | |
1292 | ||
1293 | return 0; | |
1294 | err: | |
1295 | id_priv->backlog = 0; | |
1296 | cma_comp_exch(id_priv, CMA_LISTEN, CMA_ADDR_BOUND); | |
1297 | return ret; | |
1298 | } | |
1299 | EXPORT_SYMBOL(rdma_listen); | |
1300 | ||
1301 | static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec, | |
1302 | void *context) | |
1303 | { | |
1304 | struct cma_work *work = context; | |
1305 | struct rdma_route *route; | |
1306 | ||
1307 | route = &work->id->id.route; | |
1308 | ||
1309 | if (!status) { | |
1310 | route->num_paths = 1; | |
1311 | *route->path_rec = *path_rec; | |
1312 | } else { | |
1313 | work->old_state = CMA_ROUTE_QUERY; | |
1314 | work->new_state = CMA_ADDR_RESOLVED; | |
1315 | work->event.event = RDMA_CM_EVENT_ROUTE_ERROR; | |
8f0472d3 | 1316 | work->event.status = status; |
e51060f0 SH |
1317 | } |
1318 | ||
1319 | queue_work(cma_wq, &work->work); | |
1320 | } | |
1321 | ||
1322 | static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms, | |
1323 | struct cma_work *work) | |
1324 | { | |
1325 | struct rdma_dev_addr *addr = &id_priv->id.route.addr.dev_addr; | |
1326 | struct ib_sa_path_rec path_rec; | |
1327 | ||
1328 | memset(&path_rec, 0, sizeof path_rec); | |
f0ee3404 MT |
1329 | ib_addr_get_sgid(addr, &path_rec.sgid); |
1330 | ib_addr_get_dgid(addr, &path_rec.dgid); | |
e51060f0 SH |
1331 | path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(addr)); |
1332 | path_rec.numb_path = 1; | |
1333 | ||
c1a0b23b | 1334 | id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device, |
e51060f0 SH |
1335 | id_priv->id.port_num, &path_rec, |
1336 | IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID | | |
1337 | IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH, | |
1338 | timeout_ms, GFP_KERNEL, | |
1339 | cma_query_handler, work, &id_priv->query); | |
1340 | ||
1341 | return (id_priv->query_id < 0) ? id_priv->query_id : 0; | |
1342 | } | |
1343 | ||
c4028958 | 1344 | static void cma_work_handler(struct work_struct *_work) |
e51060f0 | 1345 | { |
c4028958 | 1346 | struct cma_work *work = container_of(_work, struct cma_work, work); |
e51060f0 SH |
1347 | struct rdma_id_private *id_priv = work->id; |
1348 | int destroy = 0; | |
1349 | ||
1350 | atomic_inc(&id_priv->dev_remove); | |
1351 | if (!cma_comp_exch(id_priv, work->old_state, work->new_state)) | |
1352 | goto out; | |
1353 | ||
1354 | if (id_priv->id.event_handler(&id_priv->id, &work->event)) { | |
1355 | cma_exch(id_priv, CMA_DESTROYING); | |
1356 | destroy = 1; | |
1357 | } | |
1358 | out: | |
1359 | cma_release_remove(id_priv); | |
1360 | cma_deref_id(id_priv); | |
1361 | if (destroy) | |
1362 | rdma_destroy_id(&id_priv->id); | |
1363 | kfree(work); | |
1364 | } | |
1365 | ||
1366 | static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms) | |
1367 | { | |
1368 | struct rdma_route *route = &id_priv->id.route; | |
1369 | struct cma_work *work; | |
1370 | int ret; | |
1371 | ||
1372 | work = kzalloc(sizeof *work, GFP_KERNEL); | |
1373 | if (!work) | |
1374 | return -ENOMEM; | |
1375 | ||
1376 | work->id = id_priv; | |
c4028958 | 1377 | INIT_WORK(&work->work, cma_work_handler); |
e51060f0 SH |
1378 | work->old_state = CMA_ROUTE_QUERY; |
1379 | work->new_state = CMA_ROUTE_RESOLVED; | |
1380 | work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; | |
1381 | ||
1382 | route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL); | |
1383 | if (!route->path_rec) { | |
1384 | ret = -ENOMEM; | |
1385 | goto err1; | |
1386 | } | |
1387 | ||
1388 | ret = cma_query_ib_route(id_priv, timeout_ms, work); | |
1389 | if (ret) | |
1390 | goto err2; | |
1391 | ||
1392 | return 0; | |
1393 | err2: | |
1394 | kfree(route->path_rec); | |
1395 | route->path_rec = NULL; | |
1396 | err1: | |
1397 | kfree(work); | |
1398 | return ret; | |
1399 | } | |
1400 | ||
1401 | int rdma_set_ib_paths(struct rdma_cm_id *id, | |
1402 | struct ib_sa_path_rec *path_rec, int num_paths) | |
1403 | { | |
1404 | struct rdma_id_private *id_priv; | |
1405 | int ret; | |
1406 | ||
1407 | id_priv = container_of(id, struct rdma_id_private, id); | |
1408 | if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_RESOLVED)) | |
1409 | return -EINVAL; | |
1410 | ||
1411 | id->route.path_rec = kmalloc(sizeof *path_rec * num_paths, GFP_KERNEL); | |
1412 | if (!id->route.path_rec) { | |
1413 | ret = -ENOMEM; | |
1414 | goto err; | |
1415 | } | |
1416 | ||
1417 | memcpy(id->route.path_rec, path_rec, sizeof *path_rec * num_paths); | |
1418 | return 0; | |
1419 | err: | |
1420 | cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_ADDR_RESOLVED); | |
1421 | return ret; | |
1422 | } | |
1423 | EXPORT_SYMBOL(rdma_set_ib_paths); | |
1424 | ||
07ebafba TT |
1425 | static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms) |
1426 | { | |
1427 | struct cma_work *work; | |
1428 | ||
1429 | work = kzalloc(sizeof *work, GFP_KERNEL); | |
1430 | if (!work) | |
1431 | return -ENOMEM; | |
1432 | ||
1433 | work->id = id_priv; | |
c4028958 | 1434 | INIT_WORK(&work->work, cma_work_handler); |
07ebafba TT |
1435 | work->old_state = CMA_ROUTE_QUERY; |
1436 | work->new_state = CMA_ROUTE_RESOLVED; | |
1437 | work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; | |
1438 | queue_work(cma_wq, &work->work); | |
1439 | return 0; | |
1440 | } | |
1441 | ||
e51060f0 SH |
1442 | int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms) |
1443 | { | |
1444 | struct rdma_id_private *id_priv; | |
1445 | int ret; | |
1446 | ||
1447 | id_priv = container_of(id, struct rdma_id_private, id); | |
1448 | if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_QUERY)) | |
1449 | return -EINVAL; | |
1450 | ||
1451 | atomic_inc(&id_priv->refcount); | |
07ebafba TT |
1452 | switch (rdma_node_get_transport(id->device->node_type)) { |
1453 | case RDMA_TRANSPORT_IB: | |
e51060f0 SH |
1454 | ret = cma_resolve_ib_route(id_priv, timeout_ms); |
1455 | break; | |
07ebafba TT |
1456 | case RDMA_TRANSPORT_IWARP: |
1457 | ret = cma_resolve_iw_route(id_priv, timeout_ms); | |
1458 | break; | |
e51060f0 SH |
1459 | default: |
1460 | ret = -ENOSYS; | |
1461 | break; | |
1462 | } | |
1463 | if (ret) | |
1464 | goto err; | |
1465 | ||
1466 | return 0; | |
1467 | err: | |
1468 | cma_comp_exch(id_priv, CMA_ROUTE_QUERY, CMA_ADDR_RESOLVED); | |
1469 | cma_deref_id(id_priv); | |
1470 | return ret; | |
1471 | } | |
1472 | EXPORT_SYMBOL(rdma_resolve_route); | |
1473 | ||
1474 | static int cma_bind_loopback(struct rdma_id_private *id_priv) | |
1475 | { | |
1476 | struct cma_device *cma_dev; | |
1477 | struct ib_port_attr port_attr; | |
f0ee3404 | 1478 | union ib_gid gid; |
e51060f0 SH |
1479 | u16 pkey; |
1480 | int ret; | |
1481 | u8 p; | |
1482 | ||
1483 | mutex_lock(&lock); | |
1484 | list_for_each_entry(cma_dev, &dev_list, list) | |
1485 | for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p) | |
1486 | if (!ib_query_port (cma_dev->device, p, &port_attr) && | |
1487 | port_attr.state == IB_PORT_ACTIVE) | |
1488 | goto port_found; | |
1489 | ||
1490 | if (!list_empty(&dev_list)) { | |
1491 | p = 1; | |
1492 | cma_dev = list_entry(dev_list.next, struct cma_device, list); | |
1493 | } else { | |
1494 | ret = -ENODEV; | |
1495 | goto out; | |
1496 | } | |
1497 | ||
1498 | port_found: | |
f0ee3404 | 1499 | ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid); |
e51060f0 SH |
1500 | if (ret) |
1501 | goto out; | |
1502 | ||
1503 | ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey); | |
1504 | if (ret) | |
1505 | goto out; | |
1506 | ||
f0ee3404 | 1507 | ib_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid); |
e51060f0 SH |
1508 | ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey); |
1509 | id_priv->id.port_num = p; | |
1510 | cma_attach_to_dev(id_priv, cma_dev); | |
1511 | out: | |
1512 | mutex_unlock(&lock); | |
1513 | return ret; | |
1514 | } | |
1515 | ||
1516 | static void addr_handler(int status, struct sockaddr *src_addr, | |
1517 | struct rdma_dev_addr *dev_addr, void *context) | |
1518 | { | |
1519 | struct rdma_id_private *id_priv = context; | |
1520 | enum rdma_cm_event_type event; | |
1521 | ||
1522 | atomic_inc(&id_priv->dev_remove); | |
61a73c70 SH |
1523 | |
1524 | /* | |
1525 | * Grab mutex to block rdma_destroy_id() from removing the device while | |
1526 | * we're trying to acquire it. | |
1527 | */ | |
1528 | mutex_lock(&lock); | |
1529 | if (!cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_RESOLVED)) { | |
1530 | mutex_unlock(&lock); | |
1531 | goto out; | |
1532 | } | |
1533 | ||
1534 | if (!status && !id_priv->cma_dev) | |
e51060f0 | 1535 | status = cma_acquire_dev(id_priv); |
61a73c70 | 1536 | mutex_unlock(&lock); |
e51060f0 SH |
1537 | |
1538 | if (status) { | |
61a73c70 | 1539 | if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ADDR_BOUND)) |
e51060f0 SH |
1540 | goto out; |
1541 | event = RDMA_CM_EVENT_ADDR_ERROR; | |
1542 | } else { | |
e51060f0 SH |
1543 | memcpy(&id_priv->id.route.addr.src_addr, src_addr, |
1544 | ip_addr_size(src_addr)); | |
1545 | event = RDMA_CM_EVENT_ADDR_RESOLVED; | |
1546 | } | |
1547 | ||
1548 | if (cma_notify_user(id_priv, event, status, NULL, 0)) { | |
1549 | cma_exch(id_priv, CMA_DESTROYING); | |
1550 | cma_release_remove(id_priv); | |
1551 | cma_deref_id(id_priv); | |
1552 | rdma_destroy_id(&id_priv->id); | |
1553 | return; | |
1554 | } | |
1555 | out: | |
1556 | cma_release_remove(id_priv); | |
1557 | cma_deref_id(id_priv); | |
1558 | } | |
1559 | ||
1560 | static int cma_resolve_loopback(struct rdma_id_private *id_priv) | |
1561 | { | |
1562 | struct cma_work *work; | |
1563 | struct sockaddr_in *src_in, *dst_in; | |
f0ee3404 | 1564 | union ib_gid gid; |
e51060f0 SH |
1565 | int ret; |
1566 | ||
1567 | work = kzalloc(sizeof *work, GFP_KERNEL); | |
1568 | if (!work) | |
1569 | return -ENOMEM; | |
1570 | ||
1571 | if (!id_priv->cma_dev) { | |
1572 | ret = cma_bind_loopback(id_priv); | |
1573 | if (ret) | |
1574 | goto err; | |
1575 | } | |
1576 | ||
f0ee3404 MT |
1577 | ib_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid); |
1578 | ib_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid); | |
e51060f0 SH |
1579 | |
1580 | if (cma_zero_addr(&id_priv->id.route.addr.src_addr)) { | |
1581 | src_in = (struct sockaddr_in *)&id_priv->id.route.addr.src_addr; | |
1582 | dst_in = (struct sockaddr_in *)&id_priv->id.route.addr.dst_addr; | |
1583 | src_in->sin_family = dst_in->sin_family; | |
1584 | src_in->sin_addr.s_addr = dst_in->sin_addr.s_addr; | |
1585 | } | |
1586 | ||
1587 | work->id = id_priv; | |
c4028958 | 1588 | INIT_WORK(&work->work, cma_work_handler); |
e51060f0 SH |
1589 | work->old_state = CMA_ADDR_QUERY; |
1590 | work->new_state = CMA_ADDR_RESOLVED; | |
1591 | work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED; | |
1592 | queue_work(cma_wq, &work->work); | |
1593 | return 0; | |
1594 | err: | |
1595 | kfree(work); | |
1596 | return ret; | |
1597 | } | |
1598 | ||
1599 | static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, | |
1600 | struct sockaddr *dst_addr) | |
1601 | { | |
1602 | if (src_addr && src_addr->sa_family) | |
1603 | return rdma_bind_addr(id, src_addr); | |
1604 | else | |
1605 | return cma_bind_any(id, dst_addr->sa_family); | |
1606 | } | |
1607 | ||
1608 | int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, | |
1609 | struct sockaddr *dst_addr, int timeout_ms) | |
1610 | { | |
1611 | struct rdma_id_private *id_priv; | |
1612 | int ret; | |
1613 | ||
1614 | id_priv = container_of(id, struct rdma_id_private, id); | |
1615 | if (id_priv->state == CMA_IDLE) { | |
1616 | ret = cma_bind_addr(id, src_addr, dst_addr); | |
1617 | if (ret) | |
1618 | return ret; | |
1619 | } | |
1620 | ||
1621 | if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_ADDR_QUERY)) | |
1622 | return -EINVAL; | |
1623 | ||
1624 | atomic_inc(&id_priv->refcount); | |
1625 | memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr)); | |
1626 | if (cma_any_addr(dst_addr)) | |
1627 | ret = cma_resolve_loopback(id_priv); | |
1628 | else | |
7a118df3 SH |
1629 | ret = rdma_resolve_ip(&addr_client, &id->route.addr.src_addr, |
1630 | dst_addr, &id->route.addr.dev_addr, | |
e51060f0 SH |
1631 | timeout_ms, addr_handler, id_priv); |
1632 | if (ret) | |
1633 | goto err; | |
1634 | ||
1635 | return 0; | |
1636 | err: | |
1637 | cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_BOUND); | |
1638 | cma_deref_id(id_priv); | |
1639 | return ret; | |
1640 | } | |
1641 | EXPORT_SYMBOL(rdma_resolve_addr); | |
1642 | ||
1643 | static void cma_bind_port(struct rdma_bind_list *bind_list, | |
1644 | struct rdma_id_private *id_priv) | |
1645 | { | |
1646 | struct sockaddr_in *sin; | |
1647 | ||
1648 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; | |
1649 | sin->sin_port = htons(bind_list->port); | |
1650 | id_priv->bind_list = bind_list; | |
1651 | hlist_add_head(&id_priv->node, &bind_list->owners); | |
1652 | } | |
1653 | ||
1654 | static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv, | |
1655 | unsigned short snum) | |
1656 | { | |
1657 | struct rdma_bind_list *bind_list; | |
1658 | int port, start, ret; | |
1659 | ||
1660 | bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL); | |
1661 | if (!bind_list) | |
1662 | return -ENOMEM; | |
1663 | ||
1664 | start = snum ? snum : sysctl_local_port_range[0]; | |
1665 | ||
1666 | do { | |
1667 | ret = idr_get_new_above(ps, bind_list, start, &port); | |
1668 | } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL)); | |
1669 | ||
1670 | if (ret) | |
1671 | goto err; | |
1672 | ||
1673 | if ((snum && port != snum) || | |
1674 | (!snum && port > sysctl_local_port_range[1])) { | |
1675 | idr_remove(ps, port); | |
1676 | ret = -EADDRNOTAVAIL; | |
1677 | goto err; | |
1678 | } | |
1679 | ||
1680 | bind_list->ps = ps; | |
1681 | bind_list->port = (unsigned short) port; | |
1682 | cma_bind_port(bind_list, id_priv); | |
1683 | return 0; | |
1684 | err: | |
1685 | kfree(bind_list); | |
1686 | return ret; | |
1687 | } | |
1688 | ||
1689 | static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv) | |
1690 | { | |
1691 | struct rdma_id_private *cur_id; | |
1692 | struct sockaddr_in *sin, *cur_sin; | |
1693 | struct rdma_bind_list *bind_list; | |
1694 | struct hlist_node *node; | |
1695 | unsigned short snum; | |
1696 | ||
1697 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; | |
1698 | snum = ntohs(sin->sin_port); | |
1699 | if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) | |
1700 | return -EACCES; | |
1701 | ||
1702 | bind_list = idr_find(ps, snum); | |
1703 | if (!bind_list) | |
1704 | return cma_alloc_port(ps, id_priv, snum); | |
1705 | ||
1706 | /* | |
1707 | * We don't support binding to any address if anyone is bound to | |
1708 | * a specific address on the same port. | |
1709 | */ | |
1710 | if (cma_any_addr(&id_priv->id.route.addr.src_addr)) | |
1711 | return -EADDRNOTAVAIL; | |
1712 | ||
1713 | hlist_for_each_entry(cur_id, node, &bind_list->owners, node) { | |
1714 | if (cma_any_addr(&cur_id->id.route.addr.src_addr)) | |
1715 | return -EADDRNOTAVAIL; | |
3cd96564 | 1716 | |
e51060f0 SH |
1717 | cur_sin = (struct sockaddr_in *) &cur_id->id.route.addr.src_addr; |
1718 | if (sin->sin_addr.s_addr == cur_sin->sin_addr.s_addr) | |
1719 | return -EADDRINUSE; | |
1720 | } | |
1721 | ||
1722 | cma_bind_port(bind_list, id_priv); | |
1723 | return 0; | |
1724 | } | |
1725 | ||
1726 | static int cma_get_port(struct rdma_id_private *id_priv) | |
1727 | { | |
1728 | struct idr *ps; | |
1729 | int ret; | |
1730 | ||
1731 | switch (id_priv->id.ps) { | |
1732 | case RDMA_PS_SDP: | |
1733 | ps = &sdp_ps; | |
1734 | break; | |
1735 | case RDMA_PS_TCP: | |
1736 | ps = &tcp_ps; | |
1737 | break; | |
1738 | default: | |
1739 | return -EPROTONOSUPPORT; | |
1740 | } | |
1741 | ||
1742 | mutex_lock(&lock); | |
1743 | if (cma_any_port(&id_priv->id.route.addr.src_addr)) | |
1744 | ret = cma_alloc_port(ps, id_priv, 0); | |
1745 | else | |
1746 | ret = cma_use_port(ps, id_priv); | |
1747 | mutex_unlock(&lock); | |
1748 | ||
1749 | return ret; | |
1750 | } | |
1751 | ||
1752 | int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr) | |
1753 | { | |
1754 | struct rdma_id_private *id_priv; | |
1755 | int ret; | |
1756 | ||
1757 | if (addr->sa_family != AF_INET) | |
1758 | return -EAFNOSUPPORT; | |
1759 | ||
1760 | id_priv = container_of(id, struct rdma_id_private, id); | |
1761 | if (!cma_comp_exch(id_priv, CMA_IDLE, CMA_ADDR_BOUND)) | |
1762 | return -EINVAL; | |
1763 | ||
1764 | if (!cma_any_addr(addr)) { | |
1765 | ret = rdma_translate_ip(addr, &id->route.addr.dev_addr); | |
e51060f0 | 1766 | if (ret) |
255d0c14 KK |
1767 | goto err1; |
1768 | ||
1769 | mutex_lock(&lock); | |
1770 | ret = cma_acquire_dev(id_priv); | |
1771 | mutex_unlock(&lock); | |
1772 | if (ret) | |
1773 | goto err1; | |
e51060f0 SH |
1774 | } |
1775 | ||
1776 | memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr)); | |
1777 | ret = cma_get_port(id_priv); | |
1778 | if (ret) | |
255d0c14 | 1779 | goto err2; |
e51060f0 SH |
1780 | |
1781 | return 0; | |
255d0c14 KK |
1782 | err2: |
1783 | if (!cma_any_addr(addr)) { | |
1784 | mutex_lock(&lock); | |
1785 | cma_detach_from_dev(id_priv); | |
1786 | mutex_unlock(&lock); | |
1787 | } | |
1788 | err1: | |
e51060f0 SH |
1789 | cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_IDLE); |
1790 | return ret; | |
1791 | } | |
1792 | EXPORT_SYMBOL(rdma_bind_addr); | |
1793 | ||
1794 | static int cma_format_hdr(void *hdr, enum rdma_port_space ps, | |
1795 | struct rdma_route *route) | |
1796 | { | |
1797 | struct sockaddr_in *src4, *dst4; | |
1798 | struct cma_hdr *cma_hdr; | |
1799 | struct sdp_hh *sdp_hdr; | |
1800 | ||
1801 | src4 = (struct sockaddr_in *) &route->addr.src_addr; | |
1802 | dst4 = (struct sockaddr_in *) &route->addr.dst_addr; | |
1803 | ||
1804 | switch (ps) { | |
1805 | case RDMA_PS_SDP: | |
1806 | sdp_hdr = hdr; | |
1807 | if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION) | |
1808 | return -EINVAL; | |
1809 | sdp_set_ip_ver(sdp_hdr, 4); | |
1810 | sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; | |
1811 | sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; | |
1812 | sdp_hdr->port = src4->sin_port; | |
1813 | break; | |
1814 | default: | |
1815 | cma_hdr = hdr; | |
1816 | cma_hdr->cma_version = CMA_VERSION; | |
1817 | cma_set_ip_ver(cma_hdr, 4); | |
1818 | cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; | |
1819 | cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; | |
1820 | cma_hdr->port = src4->sin_port; | |
1821 | break; | |
1822 | } | |
1823 | return 0; | |
1824 | } | |
1825 | ||
1826 | static int cma_connect_ib(struct rdma_id_private *id_priv, | |
1827 | struct rdma_conn_param *conn_param) | |
1828 | { | |
1829 | struct ib_cm_req_param req; | |
1830 | struct rdma_route *route; | |
1831 | void *private_data; | |
1832 | int offset, ret; | |
1833 | ||
1834 | memset(&req, 0, sizeof req); | |
1835 | offset = cma_user_data_offset(id_priv->id.ps); | |
1836 | req.private_data_len = offset + conn_param->private_data_len; | |
1837 | private_data = kzalloc(req.private_data_len, GFP_ATOMIC); | |
1838 | if (!private_data) | |
1839 | return -ENOMEM; | |
1840 | ||
1841 | if (conn_param->private_data && conn_param->private_data_len) | |
1842 | memcpy(private_data + offset, conn_param->private_data, | |
1843 | conn_param->private_data_len); | |
1844 | ||
1845 | id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_ib_handler, | |
1846 | id_priv); | |
1847 | if (IS_ERR(id_priv->cm_id.ib)) { | |
1848 | ret = PTR_ERR(id_priv->cm_id.ib); | |
1849 | goto out; | |
1850 | } | |
1851 | ||
1852 | route = &id_priv->id.route; | |
1853 | ret = cma_format_hdr(private_data, id_priv->id.ps, route); | |
1854 | if (ret) | |
1855 | goto out; | |
1856 | req.private_data = private_data; | |
1857 | ||
1858 | req.primary_path = &route->path_rec[0]; | |
1859 | if (route->num_paths == 2) | |
1860 | req.alternate_path = &route->path_rec[1]; | |
1861 | ||
1862 | req.service_id = cma_get_service_id(id_priv->id.ps, | |
1863 | &route->addr.dst_addr); | |
1864 | req.qp_num = id_priv->qp_num; | |
1865 | req.qp_type = id_priv->qp_type; | |
1866 | req.starting_psn = id_priv->seq_num; | |
1867 | req.responder_resources = conn_param->responder_resources; | |
1868 | req.initiator_depth = conn_param->initiator_depth; | |
1869 | req.flow_control = conn_param->flow_control; | |
1870 | req.retry_count = conn_param->retry_count; | |
1871 | req.rnr_retry_count = conn_param->rnr_retry_count; | |
1872 | req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; | |
1873 | req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; | |
1874 | req.max_cm_retries = CMA_MAX_CM_RETRIES; | |
1875 | req.srq = id_priv->srq ? 1 : 0; | |
1876 | ||
1877 | ret = ib_send_cm_req(id_priv->cm_id.ib, &req); | |
1878 | out: | |
675a027c KK |
1879 | if (ret && !IS_ERR(id_priv->cm_id.ib)) { |
1880 | ib_destroy_cm_id(id_priv->cm_id.ib); | |
1881 | id_priv->cm_id.ib = NULL; | |
1882 | } | |
1883 | ||
e51060f0 SH |
1884 | kfree(private_data); |
1885 | return ret; | |
1886 | } | |
1887 | ||
07ebafba TT |
1888 | static int cma_connect_iw(struct rdma_id_private *id_priv, |
1889 | struct rdma_conn_param *conn_param) | |
1890 | { | |
1891 | struct iw_cm_id *cm_id; | |
1892 | struct sockaddr_in* sin; | |
1893 | int ret; | |
1894 | struct iw_cm_conn_param iw_param; | |
1895 | ||
1896 | cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv); | |
1897 | if (IS_ERR(cm_id)) { | |
1898 | ret = PTR_ERR(cm_id); | |
1899 | goto out; | |
1900 | } | |
1901 | ||
1902 | id_priv->cm_id.iw = cm_id; | |
1903 | ||
1904 | sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr; | |
1905 | cm_id->local_addr = *sin; | |
1906 | ||
1907 | sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr; | |
1908 | cm_id->remote_addr = *sin; | |
1909 | ||
1910 | ret = cma_modify_qp_rtr(&id_priv->id); | |
675a027c KK |
1911 | if (ret) |
1912 | goto out; | |
07ebafba TT |
1913 | |
1914 | iw_param.ord = conn_param->initiator_depth; | |
1915 | iw_param.ird = conn_param->responder_resources; | |
1916 | iw_param.private_data = conn_param->private_data; | |
1917 | iw_param.private_data_len = conn_param->private_data_len; | |
1918 | if (id_priv->id.qp) | |
1919 | iw_param.qpn = id_priv->qp_num; | |
1920 | else | |
1921 | iw_param.qpn = conn_param->qp_num; | |
1922 | ret = iw_cm_connect(cm_id, &iw_param); | |
1923 | out: | |
675a027c KK |
1924 | if (ret && !IS_ERR(cm_id)) { |
1925 | iw_destroy_cm_id(cm_id); | |
1926 | id_priv->cm_id.iw = NULL; | |
1927 | } | |
07ebafba TT |
1928 | return ret; |
1929 | } | |
1930 | ||
e51060f0 SH |
1931 | int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) |
1932 | { | |
1933 | struct rdma_id_private *id_priv; | |
1934 | int ret; | |
1935 | ||
1936 | id_priv = container_of(id, struct rdma_id_private, id); | |
1937 | if (!cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_CONNECT)) | |
1938 | return -EINVAL; | |
1939 | ||
1940 | if (!id->qp) { | |
1941 | id_priv->qp_num = conn_param->qp_num; | |
1942 | id_priv->qp_type = conn_param->qp_type; | |
1943 | id_priv->srq = conn_param->srq; | |
1944 | } | |
1945 | ||
07ebafba TT |
1946 | switch (rdma_node_get_transport(id->device->node_type)) { |
1947 | case RDMA_TRANSPORT_IB: | |
e51060f0 SH |
1948 | ret = cma_connect_ib(id_priv, conn_param); |
1949 | break; | |
07ebafba TT |
1950 | case RDMA_TRANSPORT_IWARP: |
1951 | ret = cma_connect_iw(id_priv, conn_param); | |
1952 | break; | |
e51060f0 SH |
1953 | default: |
1954 | ret = -ENOSYS; | |
1955 | break; | |
1956 | } | |
1957 | if (ret) | |
1958 | goto err; | |
1959 | ||
1960 | return 0; | |
1961 | err: | |
1962 | cma_comp_exch(id_priv, CMA_CONNECT, CMA_ROUTE_RESOLVED); | |
1963 | return ret; | |
1964 | } | |
1965 | EXPORT_SYMBOL(rdma_connect); | |
1966 | ||
1967 | static int cma_accept_ib(struct rdma_id_private *id_priv, | |
1968 | struct rdma_conn_param *conn_param) | |
1969 | { | |
1970 | struct ib_cm_rep_param rep; | |
1971 | int ret; | |
1972 | ||
1973 | ret = cma_modify_qp_rtr(&id_priv->id); | |
1974 | if (ret) | |
1975 | return ret; | |
1976 | ||
1977 | memset(&rep, 0, sizeof rep); | |
1978 | rep.qp_num = id_priv->qp_num; | |
1979 | rep.starting_psn = id_priv->seq_num; | |
1980 | rep.private_data = conn_param->private_data; | |
1981 | rep.private_data_len = conn_param->private_data_len; | |
1982 | rep.responder_resources = conn_param->responder_resources; | |
1983 | rep.initiator_depth = conn_param->initiator_depth; | |
1984 | rep.target_ack_delay = CMA_CM_RESPONSE_TIMEOUT; | |
1985 | rep.failover_accepted = 0; | |
1986 | rep.flow_control = conn_param->flow_control; | |
1987 | rep.rnr_retry_count = conn_param->rnr_retry_count; | |
1988 | rep.srq = id_priv->srq ? 1 : 0; | |
1989 | ||
1990 | return ib_send_cm_rep(id_priv->cm_id.ib, &rep); | |
1991 | } | |
1992 | ||
07ebafba TT |
1993 | static int cma_accept_iw(struct rdma_id_private *id_priv, |
1994 | struct rdma_conn_param *conn_param) | |
1995 | { | |
1996 | struct iw_cm_conn_param iw_param; | |
1997 | int ret; | |
1998 | ||
1999 | ret = cma_modify_qp_rtr(&id_priv->id); | |
2000 | if (ret) | |
2001 | return ret; | |
2002 | ||
2003 | iw_param.ord = conn_param->initiator_depth; | |
2004 | iw_param.ird = conn_param->responder_resources; | |
2005 | iw_param.private_data = conn_param->private_data; | |
2006 | iw_param.private_data_len = conn_param->private_data_len; | |
2007 | if (id_priv->id.qp) { | |
2008 | iw_param.qpn = id_priv->qp_num; | |
2009 | } else | |
2010 | iw_param.qpn = conn_param->qp_num; | |
2011 | ||
2012 | return iw_cm_accept(id_priv->cm_id.iw, &iw_param); | |
2013 | } | |
2014 | ||
e51060f0 SH |
2015 | int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) |
2016 | { | |
2017 | struct rdma_id_private *id_priv; | |
2018 | int ret; | |
2019 | ||
2020 | id_priv = container_of(id, struct rdma_id_private, id); | |
2021 | if (!cma_comp(id_priv, CMA_CONNECT)) | |
2022 | return -EINVAL; | |
2023 | ||
2024 | if (!id->qp && conn_param) { | |
2025 | id_priv->qp_num = conn_param->qp_num; | |
2026 | id_priv->qp_type = conn_param->qp_type; | |
2027 | id_priv->srq = conn_param->srq; | |
2028 | } | |
2029 | ||
07ebafba TT |
2030 | switch (rdma_node_get_transport(id->device->node_type)) { |
2031 | case RDMA_TRANSPORT_IB: | |
e51060f0 SH |
2032 | if (conn_param) |
2033 | ret = cma_accept_ib(id_priv, conn_param); | |
2034 | else | |
2035 | ret = cma_rep_recv(id_priv); | |
2036 | break; | |
07ebafba TT |
2037 | case RDMA_TRANSPORT_IWARP: |
2038 | ret = cma_accept_iw(id_priv, conn_param); | |
2039 | break; | |
e51060f0 SH |
2040 | default: |
2041 | ret = -ENOSYS; | |
2042 | break; | |
2043 | } | |
2044 | ||
2045 | if (ret) | |
2046 | goto reject; | |
2047 | ||
2048 | return 0; | |
2049 | reject: | |
2050 | cma_modify_qp_err(id); | |
2051 | rdma_reject(id, NULL, 0); | |
2052 | return ret; | |
2053 | } | |
2054 | EXPORT_SYMBOL(rdma_accept); | |
2055 | ||
2056 | int rdma_reject(struct rdma_cm_id *id, const void *private_data, | |
2057 | u8 private_data_len) | |
2058 | { | |
2059 | struct rdma_id_private *id_priv; | |
2060 | int ret; | |
2061 | ||
2062 | id_priv = container_of(id, struct rdma_id_private, id); | |
2063 | if (!cma_comp(id_priv, CMA_CONNECT)) | |
2064 | return -EINVAL; | |
2065 | ||
07ebafba TT |
2066 | switch (rdma_node_get_transport(id->device->node_type)) { |
2067 | case RDMA_TRANSPORT_IB: | |
e51060f0 SH |
2068 | ret = ib_send_cm_rej(id_priv->cm_id.ib, |
2069 | IB_CM_REJ_CONSUMER_DEFINED, NULL, 0, | |
2070 | private_data, private_data_len); | |
2071 | break; | |
07ebafba TT |
2072 | case RDMA_TRANSPORT_IWARP: |
2073 | ret = iw_cm_reject(id_priv->cm_id.iw, | |
2074 | private_data, private_data_len); | |
2075 | break; | |
e51060f0 SH |
2076 | default: |
2077 | ret = -ENOSYS; | |
2078 | break; | |
2079 | } | |
2080 | return ret; | |
2081 | } | |
2082 | EXPORT_SYMBOL(rdma_reject); | |
2083 | ||
2084 | int rdma_disconnect(struct rdma_cm_id *id) | |
2085 | { | |
2086 | struct rdma_id_private *id_priv; | |
2087 | int ret; | |
2088 | ||
2089 | id_priv = container_of(id, struct rdma_id_private, id); | |
2090 | if (!cma_comp(id_priv, CMA_CONNECT) && | |
2091 | !cma_comp(id_priv, CMA_DISCONNECT)) | |
2092 | return -EINVAL; | |
2093 | ||
07ebafba TT |
2094 | switch (rdma_node_get_transport(id->device->node_type)) { |
2095 | case RDMA_TRANSPORT_IB: | |
2096 | ret = cma_modify_qp_err(id); | |
2097 | if (ret) | |
2098 | goto out; | |
e51060f0 SH |
2099 | /* Initiate or respond to a disconnect. */ |
2100 | if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0)) | |
2101 | ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0); | |
2102 | break; | |
07ebafba TT |
2103 | case RDMA_TRANSPORT_IWARP: |
2104 | ret = iw_cm_disconnect(id_priv->cm_id.iw, 0); | |
2105 | break; | |
e51060f0 | 2106 | default: |
07ebafba | 2107 | ret = -EINVAL; |
e51060f0 SH |
2108 | break; |
2109 | } | |
2110 | out: | |
2111 | return ret; | |
2112 | } | |
2113 | EXPORT_SYMBOL(rdma_disconnect); | |
2114 | ||
2115 | static void cma_add_one(struct ib_device *device) | |
2116 | { | |
2117 | struct cma_device *cma_dev; | |
2118 | struct rdma_id_private *id_priv; | |
2119 | ||
2120 | cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL); | |
2121 | if (!cma_dev) | |
2122 | return; | |
2123 | ||
2124 | cma_dev->device = device; | |
2125 | cma_dev->node_guid = device->node_guid; | |
2126 | if (!cma_dev->node_guid) | |
2127 | goto err; | |
2128 | ||
2129 | init_completion(&cma_dev->comp); | |
2130 | atomic_set(&cma_dev->refcount, 1); | |
2131 | INIT_LIST_HEAD(&cma_dev->id_list); | |
2132 | ib_set_client_data(device, &cma_client, cma_dev); | |
2133 | ||
2134 | mutex_lock(&lock); | |
2135 | list_add_tail(&cma_dev->list, &dev_list); | |
2136 | list_for_each_entry(id_priv, &listen_any_list, list) | |
2137 | cma_listen_on_dev(id_priv, cma_dev); | |
2138 | mutex_unlock(&lock); | |
2139 | return; | |
2140 | err: | |
2141 | kfree(cma_dev); | |
2142 | } | |
2143 | ||
2144 | static int cma_remove_id_dev(struct rdma_id_private *id_priv) | |
2145 | { | |
2146 | enum cma_state state; | |
2147 | ||
2148 | /* Record that we want to remove the device */ | |
2149 | state = cma_exch(id_priv, CMA_DEVICE_REMOVAL); | |
2150 | if (state == CMA_DESTROYING) | |
2151 | return 0; | |
2152 | ||
2153 | cma_cancel_operation(id_priv, state); | |
2154 | wait_event(id_priv->wait_remove, !atomic_read(&id_priv->dev_remove)); | |
2155 | ||
2156 | /* Check for destruction from another callback. */ | |
2157 | if (!cma_comp(id_priv, CMA_DEVICE_REMOVAL)) | |
2158 | return 0; | |
2159 | ||
2160 | return cma_notify_user(id_priv, RDMA_CM_EVENT_DEVICE_REMOVAL, | |
2161 | 0, NULL, 0); | |
2162 | } | |
2163 | ||
2164 | static void cma_process_remove(struct cma_device *cma_dev) | |
2165 | { | |
e51060f0 SH |
2166 | struct rdma_id_private *id_priv; |
2167 | int ret; | |
2168 | ||
e51060f0 SH |
2169 | mutex_lock(&lock); |
2170 | while (!list_empty(&cma_dev->id_list)) { | |
2171 | id_priv = list_entry(cma_dev->id_list.next, | |
2172 | struct rdma_id_private, list); | |
2173 | ||
2174 | if (cma_internal_listen(id_priv)) { | |
2175 | cma_destroy_listen(id_priv); | |
2176 | continue; | |
2177 | } | |
2178 | ||
94de178a | 2179 | list_del_init(&id_priv->list); |
e51060f0 SH |
2180 | atomic_inc(&id_priv->refcount); |
2181 | mutex_unlock(&lock); | |
2182 | ||
2183 | ret = cma_remove_id_dev(id_priv); | |
2184 | cma_deref_id(id_priv); | |
2185 | if (ret) | |
2186 | rdma_destroy_id(&id_priv->id); | |
2187 | ||
2188 | mutex_lock(&lock); | |
2189 | } | |
2190 | mutex_unlock(&lock); | |
2191 | ||
2192 | cma_deref_dev(cma_dev); | |
2193 | wait_for_completion(&cma_dev->comp); | |
2194 | } | |
2195 | ||
2196 | static void cma_remove_one(struct ib_device *device) | |
2197 | { | |
2198 | struct cma_device *cma_dev; | |
2199 | ||
2200 | cma_dev = ib_get_client_data(device, &cma_client); | |
2201 | if (!cma_dev) | |
2202 | return; | |
2203 | ||
2204 | mutex_lock(&lock); | |
2205 | list_del(&cma_dev->list); | |
2206 | mutex_unlock(&lock); | |
2207 | ||
2208 | cma_process_remove(cma_dev); | |
2209 | kfree(cma_dev); | |
2210 | } | |
2211 | ||
2212 | static int cma_init(void) | |
2213 | { | |
2214 | int ret; | |
2215 | ||
2216 | cma_wq = create_singlethread_workqueue("rdma_cm_wq"); | |
2217 | if (!cma_wq) | |
2218 | return -ENOMEM; | |
2219 | ||
c1a0b23b | 2220 | ib_sa_register_client(&sa_client); |
7a118df3 | 2221 | rdma_addr_register_client(&addr_client); |
c1a0b23b | 2222 | |
e51060f0 SH |
2223 | ret = ib_register_client(&cma_client); |
2224 | if (ret) | |
2225 | goto err; | |
2226 | return 0; | |
2227 | ||
2228 | err: | |
7a118df3 | 2229 | rdma_addr_unregister_client(&addr_client); |
c1a0b23b | 2230 | ib_sa_unregister_client(&sa_client); |
e51060f0 SH |
2231 | destroy_workqueue(cma_wq); |
2232 | return ret; | |
2233 | } | |
2234 | ||
2235 | static void cma_cleanup(void) | |
2236 | { | |
2237 | ib_unregister_client(&cma_client); | |
7a118df3 | 2238 | rdma_addr_unregister_client(&addr_client); |
c1a0b23b | 2239 | ib_sa_unregister_client(&sa_client); |
e51060f0 SH |
2240 | destroy_workqueue(cma_wq); |
2241 | idr_destroy(&sdp_ps); | |
2242 | idr_destroy(&tcp_ps); | |
2243 | } | |
2244 | ||
2245 | module_init(cma_init); | |
2246 | module_exit(cma_cleanup); |