Commit | Line | Data |
---|---|---|
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 |
dcb3f974 | 55 | #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24) |
e51060f0 SH |
56 | |
57 | static void cma_add_one(struct ib_device *device); | |
58 | static void cma_remove_one(struct ib_device *device); | |
59 | ||
60 | static struct ib_client cma_client = { | |
61 | .name = "cma", | |
62 | .add = cma_add_one, | |
63 | .remove = cma_remove_one | |
64 | }; | |
65 | ||
c1a0b23b | 66 | static struct ib_sa_client sa_client; |
7a118df3 | 67 | static struct rdma_addr_client addr_client; |
e51060f0 SH |
68 | static LIST_HEAD(dev_list); |
69 | static LIST_HEAD(listen_any_list); | |
70 | static DEFINE_MUTEX(lock); | |
71 | static struct workqueue_struct *cma_wq; | |
72 | static DEFINE_IDR(sdp_ps); | |
73 | static DEFINE_IDR(tcp_ps); | |
628e5f6d | 74 | static DEFINE_IDR(udp_ps); |
c8f6a362 | 75 | static DEFINE_IDR(ipoib_ps); |
aedec080 | 76 | static int next_port; |
e51060f0 SH |
77 | |
78 | struct cma_device { | |
79 | struct list_head list; | |
80 | struct ib_device *device; | |
e51060f0 SH |
81 | struct completion comp; |
82 | atomic_t refcount; | |
83 | struct list_head id_list; | |
84 | }; | |
85 | ||
86 | enum cma_state { | |
87 | CMA_IDLE, | |
88 | CMA_ADDR_QUERY, | |
89 | CMA_ADDR_RESOLVED, | |
90 | CMA_ROUTE_QUERY, | |
91 | CMA_ROUTE_RESOLVED, | |
92 | CMA_CONNECT, | |
93 | CMA_DISCONNECT, | |
94 | CMA_ADDR_BOUND, | |
95 | CMA_LISTEN, | |
96 | CMA_DEVICE_REMOVAL, | |
97 | CMA_DESTROYING | |
98 | }; | |
99 | ||
100 | struct rdma_bind_list { | |
101 | struct idr *ps; | |
102 | struct hlist_head owners; | |
103 | unsigned short port; | |
104 | }; | |
105 | ||
106 | /* | |
107 | * Device removal can occur at anytime, so we need extra handling to | |
108 | * serialize notifying the user of device removal with other callbacks. | |
109 | * We do this by disabling removal notification while a callback is in process, | |
110 | * and reporting it after the callback completes. | |
111 | */ | |
112 | struct rdma_id_private { | |
113 | struct rdma_cm_id id; | |
114 | ||
115 | struct rdma_bind_list *bind_list; | |
116 | struct hlist_node node; | |
117 | struct list_head list; | |
118 | struct list_head listen_list; | |
119 | struct cma_device *cma_dev; | |
c8f6a362 | 120 | struct list_head mc_list; |
e51060f0 SH |
121 | |
122 | enum cma_state state; | |
123 | spinlock_t lock; | |
c5483388 SH |
124 | struct mutex qp_mutex; |
125 | ||
e51060f0 SH |
126 | struct completion comp; |
127 | atomic_t refcount; | |
128 | wait_queue_head_t wait_remove; | |
129 | atomic_t dev_remove; | |
130 | ||
131 | int backlog; | |
132 | int timeout_ms; | |
133 | struct ib_sa_query *query; | |
134 | int query_id; | |
135 | union { | |
136 | struct ib_cm_id *ib; | |
07ebafba | 137 | struct iw_cm_id *iw; |
e51060f0 SH |
138 | } cm_id; |
139 | ||
140 | u32 seq_num; | |
c8f6a362 | 141 | u32 qkey; |
e51060f0 | 142 | u32 qp_num; |
e51060f0 | 143 | u8 srq; |
a81c994d | 144 | u8 tos; |
e51060f0 SH |
145 | }; |
146 | ||
c8f6a362 SH |
147 | struct cma_multicast { |
148 | struct rdma_id_private *id_priv; | |
149 | union { | |
150 | struct ib_sa_multicast *ib; | |
151 | } multicast; | |
152 | struct list_head list; | |
153 | void *context; | |
154 | struct sockaddr addr; | |
155 | u8 pad[sizeof(struct sockaddr_in6) - | |
156 | sizeof(struct sockaddr)]; | |
157 | }; | |
158 | ||
e51060f0 SH |
159 | struct cma_work { |
160 | struct work_struct work; | |
161 | struct rdma_id_private *id; | |
162 | enum cma_state old_state; | |
163 | enum cma_state new_state; | |
164 | struct rdma_cm_event event; | |
165 | }; | |
166 | ||
167 | union cma_ip_addr { | |
168 | struct in6_addr ip6; | |
169 | struct { | |
170 | __u32 pad[3]; | |
171 | __u32 addr; | |
172 | } ip4; | |
173 | }; | |
174 | ||
175 | struct cma_hdr { | |
176 | u8 cma_version; | |
177 | u8 ip_version; /* IP version: 7:4 */ | |
178 | __u16 port; | |
179 | union cma_ip_addr src_addr; | |
180 | union cma_ip_addr dst_addr; | |
181 | }; | |
182 | ||
183 | struct sdp_hh { | |
184 | u8 bsdh[16]; | |
185 | u8 sdp_version; /* Major version: 7:4 */ | |
186 | u8 ip_version; /* IP version: 7:4 */ | |
187 | u8 sdp_specific1[10]; | |
188 | __u16 port; | |
189 | __u16 sdp_specific2; | |
190 | union cma_ip_addr src_addr; | |
191 | union cma_ip_addr dst_addr; | |
192 | }; | |
193 | ||
194 | struct sdp_hah { | |
195 | u8 bsdh[16]; | |
196 | u8 sdp_version; | |
197 | }; | |
198 | ||
199 | #define CMA_VERSION 0x00 | |
200 | #define SDP_MAJ_VERSION 0x2 | |
201 | ||
202 | static int cma_comp(struct rdma_id_private *id_priv, enum cma_state comp) | |
203 | { | |
204 | unsigned long flags; | |
205 | int ret; | |
206 | ||
207 | spin_lock_irqsave(&id_priv->lock, flags); | |
208 | ret = (id_priv->state == comp); | |
209 | spin_unlock_irqrestore(&id_priv->lock, flags); | |
210 | return ret; | |
211 | } | |
212 | ||
213 | static int cma_comp_exch(struct rdma_id_private *id_priv, | |
214 | enum cma_state comp, enum cma_state exch) | |
215 | { | |
216 | unsigned long flags; | |
217 | int ret; | |
218 | ||
219 | spin_lock_irqsave(&id_priv->lock, flags); | |
220 | if ((ret = (id_priv->state == comp))) | |
221 | id_priv->state = exch; | |
222 | spin_unlock_irqrestore(&id_priv->lock, flags); | |
223 | return ret; | |
224 | } | |
225 | ||
226 | static enum cma_state cma_exch(struct rdma_id_private *id_priv, | |
227 | enum cma_state exch) | |
228 | { | |
229 | unsigned long flags; | |
230 | enum cma_state old; | |
231 | ||
232 | spin_lock_irqsave(&id_priv->lock, flags); | |
233 | old = id_priv->state; | |
234 | id_priv->state = exch; | |
235 | spin_unlock_irqrestore(&id_priv->lock, flags); | |
236 | return old; | |
237 | } | |
238 | ||
239 | static inline u8 cma_get_ip_ver(struct cma_hdr *hdr) | |
240 | { | |
241 | return hdr->ip_version >> 4; | |
242 | } | |
243 | ||
244 | static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver) | |
245 | { | |
246 | hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF); | |
247 | } | |
248 | ||
249 | static inline u8 sdp_get_majv(u8 sdp_version) | |
250 | { | |
251 | return sdp_version >> 4; | |
252 | } | |
253 | ||
254 | static inline u8 sdp_get_ip_ver(struct sdp_hh *hh) | |
255 | { | |
256 | return hh->ip_version >> 4; | |
257 | } | |
258 | ||
259 | static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver) | |
260 | { | |
261 | hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF); | |
262 | } | |
263 | ||
c8f6a362 SH |
264 | static inline int cma_is_ud_ps(enum rdma_port_space ps) |
265 | { | |
266 | return (ps == RDMA_PS_UDP || ps == RDMA_PS_IPOIB); | |
267 | } | |
268 | ||
e51060f0 SH |
269 | static void cma_attach_to_dev(struct rdma_id_private *id_priv, |
270 | struct cma_device *cma_dev) | |
271 | { | |
272 | atomic_inc(&cma_dev->refcount); | |
273 | id_priv->cma_dev = cma_dev; | |
274 | id_priv->id.device = cma_dev->device; | |
275 | list_add_tail(&id_priv->list, &cma_dev->id_list); | |
276 | } | |
277 | ||
278 | static inline void cma_deref_dev(struct cma_device *cma_dev) | |
279 | { | |
280 | if (atomic_dec_and_test(&cma_dev->refcount)) | |
281 | complete(&cma_dev->comp); | |
282 | } | |
283 | ||
284 | static void cma_detach_from_dev(struct rdma_id_private *id_priv) | |
285 | { | |
286 | list_del(&id_priv->list); | |
287 | cma_deref_dev(id_priv->cma_dev); | |
288 | id_priv->cma_dev = NULL; | |
289 | } | |
290 | ||
c8f6a362 SH |
291 | static int cma_set_qkey(struct ib_device *device, u8 port_num, |
292 | enum rdma_port_space ps, | |
293 | struct rdma_dev_addr *dev_addr, u32 *qkey) | |
294 | { | |
295 | struct ib_sa_mcmember_rec rec; | |
296 | int ret = 0; | |
297 | ||
298 | switch (ps) { | |
299 | case RDMA_PS_UDP: | |
300 | *qkey = RDMA_UDP_QKEY; | |
301 | break; | |
302 | case RDMA_PS_IPOIB: | |
303 | ib_addr_get_mgid(dev_addr, &rec.mgid); | |
304 | ret = ib_sa_get_mcmember_rec(device, port_num, &rec.mgid, &rec); | |
305 | *qkey = be32_to_cpu(rec.qkey); | |
306 | break; | |
307 | default: | |
308 | break; | |
309 | } | |
310 | return ret; | |
311 | } | |
312 | ||
07ebafba | 313 | static int cma_acquire_dev(struct rdma_id_private *id_priv) |
e51060f0 | 314 | { |
c8f6a362 | 315 | struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; |
e51060f0 | 316 | struct cma_device *cma_dev; |
f0ee3404 | 317 | union ib_gid gid; |
e51060f0 SH |
318 | int ret = -ENODEV; |
319 | ||
c8f6a362 | 320 | switch (rdma_node_get_transport(dev_addr->dev_type)) { |
07ebafba | 321 | case RDMA_TRANSPORT_IB: |
c8f6a362 | 322 | ib_addr_get_sgid(dev_addr, &gid); |
07ebafba TT |
323 | break; |
324 | case RDMA_TRANSPORT_IWARP: | |
c8f6a362 | 325 | iw_addr_get_sgid(dev_addr, &gid); |
07ebafba TT |
326 | break; |
327 | default: | |
328 | return -ENODEV; | |
329 | } | |
61a73c70 | 330 | |
e51060f0 | 331 | list_for_each_entry(cma_dev, &dev_list, list) { |
f0ee3404 | 332 | ret = ib_find_cached_gid(cma_dev->device, &gid, |
e51060f0 SH |
333 | &id_priv->id.port_num, NULL); |
334 | if (!ret) { | |
c8f6a362 SH |
335 | ret = cma_set_qkey(cma_dev->device, |
336 | id_priv->id.port_num, | |
337 | id_priv->id.ps, dev_addr, | |
338 | &id_priv->qkey); | |
339 | if (!ret) | |
340 | cma_attach_to_dev(id_priv, cma_dev); | |
e51060f0 SH |
341 | break; |
342 | } | |
343 | } | |
e51060f0 SH |
344 | return ret; |
345 | } | |
346 | ||
e51060f0 SH |
347 | static void cma_deref_id(struct rdma_id_private *id_priv) |
348 | { | |
349 | if (atomic_dec_and_test(&id_priv->refcount)) | |
350 | complete(&id_priv->comp); | |
351 | } | |
352 | ||
8aa08602 SH |
353 | static int cma_disable_remove(struct rdma_id_private *id_priv, |
354 | enum cma_state state) | |
355 | { | |
356 | unsigned long flags; | |
357 | int ret; | |
358 | ||
359 | spin_lock_irqsave(&id_priv->lock, flags); | |
360 | if (id_priv->state == state) { | |
361 | atomic_inc(&id_priv->dev_remove); | |
362 | ret = 0; | |
363 | } else | |
364 | ret = -EINVAL; | |
365 | spin_unlock_irqrestore(&id_priv->lock, flags); | |
366 | return ret; | |
367 | } | |
368 | ||
369 | static void cma_enable_remove(struct rdma_id_private *id_priv) | |
e51060f0 SH |
370 | { |
371 | if (atomic_dec_and_test(&id_priv->dev_remove)) | |
372 | wake_up(&id_priv->wait_remove); | |
373 | } | |
374 | ||
6c719f5c SH |
375 | static int cma_has_cm_dev(struct rdma_id_private *id_priv) |
376 | { | |
377 | return (id_priv->id.device && id_priv->cm_id.ib); | |
378 | } | |
379 | ||
e51060f0 SH |
380 | struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler, |
381 | void *context, enum rdma_port_space ps) | |
382 | { | |
383 | struct rdma_id_private *id_priv; | |
384 | ||
385 | id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL); | |
386 | if (!id_priv) | |
387 | return ERR_PTR(-ENOMEM); | |
388 | ||
389 | id_priv->state = CMA_IDLE; | |
390 | id_priv->id.context = context; | |
391 | id_priv->id.event_handler = event_handler; | |
392 | id_priv->id.ps = ps; | |
393 | spin_lock_init(&id_priv->lock); | |
c5483388 | 394 | mutex_init(&id_priv->qp_mutex); |
e51060f0 SH |
395 | init_completion(&id_priv->comp); |
396 | atomic_set(&id_priv->refcount, 1); | |
397 | init_waitqueue_head(&id_priv->wait_remove); | |
398 | atomic_set(&id_priv->dev_remove, 0); | |
399 | INIT_LIST_HEAD(&id_priv->listen_list); | |
c8f6a362 | 400 | INIT_LIST_HEAD(&id_priv->mc_list); |
e51060f0 SH |
401 | get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num); |
402 | ||
403 | return &id_priv->id; | |
404 | } | |
405 | EXPORT_SYMBOL(rdma_create_id); | |
406 | ||
c8f6a362 | 407 | static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) |
e51060f0 SH |
408 | { |
409 | struct ib_qp_attr qp_attr; | |
c8f6a362 | 410 | int qp_attr_mask, ret; |
e51060f0 | 411 | |
c8f6a362 SH |
412 | qp_attr.qp_state = IB_QPS_INIT; |
413 | ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); | |
e51060f0 SH |
414 | if (ret) |
415 | return ret; | |
416 | ||
c8f6a362 SH |
417 | ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); |
418 | if (ret) | |
419 | return ret; | |
420 | ||
421 | qp_attr.qp_state = IB_QPS_RTR; | |
422 | ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE); | |
423 | if (ret) | |
424 | return ret; | |
425 | ||
426 | qp_attr.qp_state = IB_QPS_RTS; | |
427 | qp_attr.sq_psn = 0; | |
428 | ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN); | |
429 | ||
430 | return ret; | |
e51060f0 SH |
431 | } |
432 | ||
c8f6a362 | 433 | static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) |
07ebafba TT |
434 | { |
435 | struct ib_qp_attr qp_attr; | |
c8f6a362 | 436 | int qp_attr_mask, ret; |
07ebafba TT |
437 | |
438 | qp_attr.qp_state = IB_QPS_INIT; | |
c8f6a362 SH |
439 | ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); |
440 | if (ret) | |
441 | return ret; | |
07ebafba | 442 | |
c8f6a362 | 443 | return ib_modify_qp(qp, &qp_attr, qp_attr_mask); |
07ebafba TT |
444 | } |
445 | ||
e51060f0 SH |
446 | int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd, |
447 | struct ib_qp_init_attr *qp_init_attr) | |
448 | { | |
449 | struct rdma_id_private *id_priv; | |
450 | struct ib_qp *qp; | |
451 | int ret; | |
452 | ||
453 | id_priv = container_of(id, struct rdma_id_private, id); | |
454 | if (id->device != pd->device) | |
455 | return -EINVAL; | |
456 | ||
457 | qp = ib_create_qp(pd, qp_init_attr); | |
458 | if (IS_ERR(qp)) | |
459 | return PTR_ERR(qp); | |
460 | ||
c8f6a362 SH |
461 | if (cma_is_ud_ps(id_priv->id.ps)) |
462 | ret = cma_init_ud_qp(id_priv, qp); | |
463 | else | |
464 | ret = cma_init_conn_qp(id_priv, qp); | |
e51060f0 SH |
465 | if (ret) |
466 | goto err; | |
467 | ||
468 | id->qp = qp; | |
469 | id_priv->qp_num = qp->qp_num; | |
e51060f0 SH |
470 | id_priv->srq = (qp->srq != NULL); |
471 | return 0; | |
472 | err: | |
473 | ib_destroy_qp(qp); | |
474 | return ret; | |
475 | } | |
476 | EXPORT_SYMBOL(rdma_create_qp); | |
477 | ||
478 | void rdma_destroy_qp(struct rdma_cm_id *id) | |
479 | { | |
c5483388 SH |
480 | struct rdma_id_private *id_priv; |
481 | ||
482 | id_priv = container_of(id, struct rdma_id_private, id); | |
483 | mutex_lock(&id_priv->qp_mutex); | |
484 | ib_destroy_qp(id_priv->id.qp); | |
485 | id_priv->id.qp = NULL; | |
486 | mutex_unlock(&id_priv->qp_mutex); | |
e51060f0 SH |
487 | } |
488 | EXPORT_SYMBOL(rdma_destroy_qp); | |
489 | ||
c5483388 | 490 | static int cma_modify_qp_rtr(struct rdma_id_private *id_priv) |
e51060f0 SH |
491 | { |
492 | struct ib_qp_attr qp_attr; | |
493 | int qp_attr_mask, ret; | |
494 | ||
c5483388 SH |
495 | mutex_lock(&id_priv->qp_mutex); |
496 | if (!id_priv->id.qp) { | |
497 | ret = 0; | |
498 | goto out; | |
499 | } | |
e51060f0 SH |
500 | |
501 | /* Need to update QP attributes from default values. */ | |
502 | qp_attr.qp_state = IB_QPS_INIT; | |
c5483388 | 503 | ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); |
e51060f0 | 504 | if (ret) |
c5483388 | 505 | goto out; |
e51060f0 | 506 | |
c5483388 | 507 | ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); |
e51060f0 | 508 | if (ret) |
c5483388 | 509 | goto out; |
e51060f0 SH |
510 | |
511 | qp_attr.qp_state = IB_QPS_RTR; | |
c5483388 | 512 | ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); |
e51060f0 | 513 | if (ret) |
c5483388 | 514 | goto out; |
e51060f0 | 515 | |
c5483388 SH |
516 | ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); |
517 | out: | |
518 | mutex_unlock(&id_priv->qp_mutex); | |
519 | return ret; | |
e51060f0 SH |
520 | } |
521 | ||
c5483388 | 522 | static int cma_modify_qp_rts(struct rdma_id_private *id_priv) |
e51060f0 SH |
523 | { |
524 | struct ib_qp_attr qp_attr; | |
525 | int qp_attr_mask, ret; | |
526 | ||
c5483388 SH |
527 | mutex_lock(&id_priv->qp_mutex); |
528 | if (!id_priv->id.qp) { | |
529 | ret = 0; | |
530 | goto out; | |
531 | } | |
e51060f0 SH |
532 | |
533 | qp_attr.qp_state = IB_QPS_RTS; | |
c5483388 | 534 | ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); |
e51060f0 | 535 | if (ret) |
c5483388 | 536 | goto out; |
e51060f0 | 537 | |
c5483388 SH |
538 | ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); |
539 | out: | |
540 | mutex_unlock(&id_priv->qp_mutex); | |
541 | return ret; | |
e51060f0 SH |
542 | } |
543 | ||
c5483388 | 544 | static int cma_modify_qp_err(struct rdma_id_private *id_priv) |
e51060f0 SH |
545 | { |
546 | struct ib_qp_attr qp_attr; | |
c5483388 | 547 | int ret; |
e51060f0 | 548 | |
c5483388 SH |
549 | mutex_lock(&id_priv->qp_mutex); |
550 | if (!id_priv->id.qp) { | |
551 | ret = 0; | |
552 | goto out; | |
553 | } | |
e51060f0 SH |
554 | |
555 | qp_attr.qp_state = IB_QPS_ERR; | |
c5483388 SH |
556 | ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE); |
557 | out: | |
558 | mutex_unlock(&id_priv->qp_mutex); | |
559 | return ret; | |
e51060f0 SH |
560 | } |
561 | ||
c8f6a362 SH |
562 | static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv, |
563 | struct ib_qp_attr *qp_attr, int *qp_attr_mask) | |
564 | { | |
565 | struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; | |
566 | int ret; | |
567 | ||
568 | ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num, | |
569 | ib_addr_get_pkey(dev_addr), | |
570 | &qp_attr->pkey_index); | |
571 | if (ret) | |
572 | return ret; | |
573 | ||
574 | qp_attr->port_num = id_priv->id.port_num; | |
575 | *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT; | |
576 | ||
577 | if (cma_is_ud_ps(id_priv->id.ps)) { | |
578 | qp_attr->qkey = id_priv->qkey; | |
579 | *qp_attr_mask |= IB_QP_QKEY; | |
580 | } else { | |
581 | qp_attr->qp_access_flags = 0; | |
582 | *qp_attr_mask |= IB_QP_ACCESS_FLAGS; | |
583 | } | |
584 | return 0; | |
585 | } | |
586 | ||
e51060f0 SH |
587 | int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr, |
588 | int *qp_attr_mask) | |
589 | { | |
590 | struct rdma_id_private *id_priv; | |
c8f6a362 | 591 | int ret = 0; |
e51060f0 SH |
592 | |
593 | id_priv = container_of(id, struct rdma_id_private, id); | |
07ebafba TT |
594 | switch (rdma_node_get_transport(id_priv->id.device->node_type)) { |
595 | case RDMA_TRANSPORT_IB: | |
c8f6a362 SH |
596 | if (!id_priv->cm_id.ib || cma_is_ud_ps(id_priv->id.ps)) |
597 | ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask); | |
598 | else | |
599 | ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr, | |
600 | qp_attr_mask); | |
e51060f0 SH |
601 | if (qp_attr->qp_state == IB_QPS_RTR) |
602 | qp_attr->rq_psn = id_priv->seq_num; | |
603 | break; | |
07ebafba | 604 | case RDMA_TRANSPORT_IWARP: |
c8f6a362 | 605 | if (!id_priv->cm_id.iw) { |
8f076531 | 606 | qp_attr->qp_access_flags = 0; |
c8f6a362 SH |
607 | *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS; |
608 | } else | |
609 | ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr, | |
610 | qp_attr_mask); | |
07ebafba | 611 | break; |
e51060f0 SH |
612 | default: |
613 | ret = -ENOSYS; | |
614 | break; | |
615 | } | |
616 | ||
617 | return ret; | |
618 | } | |
619 | EXPORT_SYMBOL(rdma_init_qp_attr); | |
620 | ||
621 | static inline int cma_zero_addr(struct sockaddr *addr) | |
622 | { | |
623 | struct in6_addr *ip6; | |
624 | ||
625 | if (addr->sa_family == AF_INET) | |
626 | return ZERONET(((struct sockaddr_in *) addr)->sin_addr.s_addr); | |
627 | else { | |
628 | ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr; | |
629 | return (ip6->s6_addr32[0] | ip6->s6_addr32[1] | | |
5fd571cb | 630 | ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0; |
e51060f0 SH |
631 | } |
632 | } | |
633 | ||
634 | static inline int cma_loopback_addr(struct sockaddr *addr) | |
635 | { | |
636 | return LOOPBACK(((struct sockaddr_in *) addr)->sin_addr.s_addr); | |
637 | } | |
638 | ||
639 | static inline int cma_any_addr(struct sockaddr *addr) | |
640 | { | |
641 | return cma_zero_addr(addr) || cma_loopback_addr(addr); | |
642 | } | |
643 | ||
628e5f6d SH |
644 | static inline __be16 cma_port(struct sockaddr *addr) |
645 | { | |
646 | if (addr->sa_family == AF_INET) | |
647 | return ((struct sockaddr_in *) addr)->sin_port; | |
648 | else | |
649 | return ((struct sockaddr_in6 *) addr)->sin6_port; | |
650 | } | |
651 | ||
e51060f0 SH |
652 | static inline int cma_any_port(struct sockaddr *addr) |
653 | { | |
628e5f6d | 654 | return !cma_port(addr); |
e51060f0 SH |
655 | } |
656 | ||
657 | static int cma_get_net_info(void *hdr, enum rdma_port_space ps, | |
658 | u8 *ip_ver, __u16 *port, | |
659 | union cma_ip_addr **src, union cma_ip_addr **dst) | |
660 | { | |
661 | switch (ps) { | |
662 | case RDMA_PS_SDP: | |
663 | if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) != | |
664 | SDP_MAJ_VERSION) | |
665 | return -EINVAL; | |
666 | ||
667 | *ip_ver = sdp_get_ip_ver(hdr); | |
668 | *port = ((struct sdp_hh *) hdr)->port; | |
669 | *src = &((struct sdp_hh *) hdr)->src_addr; | |
670 | *dst = &((struct sdp_hh *) hdr)->dst_addr; | |
671 | break; | |
672 | default: | |
673 | if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION) | |
674 | return -EINVAL; | |
675 | ||
676 | *ip_ver = cma_get_ip_ver(hdr); | |
677 | *port = ((struct cma_hdr *) hdr)->port; | |
678 | *src = &((struct cma_hdr *) hdr)->src_addr; | |
679 | *dst = &((struct cma_hdr *) hdr)->dst_addr; | |
680 | break; | |
681 | } | |
682 | ||
683 | if (*ip_ver != 4 && *ip_ver != 6) | |
684 | return -EINVAL; | |
685 | return 0; | |
686 | } | |
687 | ||
688 | static void cma_save_net_info(struct rdma_addr *addr, | |
689 | struct rdma_addr *listen_addr, | |
690 | u8 ip_ver, __u16 port, | |
691 | union cma_ip_addr *src, union cma_ip_addr *dst) | |
692 | { | |
693 | struct sockaddr_in *listen4, *ip4; | |
694 | struct sockaddr_in6 *listen6, *ip6; | |
695 | ||
696 | switch (ip_ver) { | |
697 | case 4: | |
698 | listen4 = (struct sockaddr_in *) &listen_addr->src_addr; | |
699 | ip4 = (struct sockaddr_in *) &addr->src_addr; | |
700 | ip4->sin_family = listen4->sin_family; | |
701 | ip4->sin_addr.s_addr = dst->ip4.addr; | |
702 | ip4->sin_port = listen4->sin_port; | |
703 | ||
704 | ip4 = (struct sockaddr_in *) &addr->dst_addr; | |
705 | ip4->sin_family = listen4->sin_family; | |
706 | ip4->sin_addr.s_addr = src->ip4.addr; | |
707 | ip4->sin_port = port; | |
708 | break; | |
709 | case 6: | |
710 | listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr; | |
711 | ip6 = (struct sockaddr_in6 *) &addr->src_addr; | |
712 | ip6->sin6_family = listen6->sin6_family; | |
713 | ip6->sin6_addr = dst->ip6; | |
714 | ip6->sin6_port = listen6->sin6_port; | |
715 | ||
716 | ip6 = (struct sockaddr_in6 *) &addr->dst_addr; | |
717 | ip6->sin6_family = listen6->sin6_family; | |
718 | ip6->sin6_addr = src->ip6; | |
719 | ip6->sin6_port = port; | |
720 | break; | |
721 | default: | |
722 | break; | |
723 | } | |
724 | } | |
725 | ||
726 | static inline int cma_user_data_offset(enum rdma_port_space ps) | |
727 | { | |
728 | switch (ps) { | |
729 | case RDMA_PS_SDP: | |
730 | return 0; | |
731 | default: | |
732 | return sizeof(struct cma_hdr); | |
733 | } | |
734 | } | |
735 | ||
e51060f0 SH |
736 | static void cma_cancel_route(struct rdma_id_private *id_priv) |
737 | { | |
07ebafba TT |
738 | switch (rdma_node_get_transport(id_priv->id.device->node_type)) { |
739 | case RDMA_TRANSPORT_IB: | |
e51060f0 SH |
740 | if (id_priv->query) |
741 | ib_sa_cancel_query(id_priv->query_id, id_priv->query); | |
742 | break; | |
743 | default: | |
744 | break; | |
745 | } | |
746 | } | |
747 | ||
748 | static inline int cma_internal_listen(struct rdma_id_private *id_priv) | |
749 | { | |
750 | return (id_priv->state == CMA_LISTEN) && id_priv->cma_dev && | |
751 | cma_any_addr(&id_priv->id.route.addr.src_addr); | |
752 | } | |
753 | ||
754 | static void cma_destroy_listen(struct rdma_id_private *id_priv) | |
755 | { | |
756 | cma_exch(id_priv, CMA_DESTROYING); | |
757 | ||
758 | if (id_priv->cma_dev) { | |
07ebafba TT |
759 | switch (rdma_node_get_transport(id_priv->id.device->node_type)) { |
760 | case RDMA_TRANSPORT_IB: | |
3cd96564 | 761 | if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib)) |
e51060f0 SH |
762 | ib_destroy_cm_id(id_priv->cm_id.ib); |
763 | break; | |
07ebafba TT |
764 | case RDMA_TRANSPORT_IWARP: |
765 | if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw)) | |
766 | iw_destroy_cm_id(id_priv->cm_id.iw); | |
767 | break; | |
e51060f0 SH |
768 | default: |
769 | break; | |
770 | } | |
771 | cma_detach_from_dev(id_priv); | |
772 | } | |
773 | list_del(&id_priv->listen_list); | |
774 | ||
775 | cma_deref_id(id_priv); | |
776 | wait_for_completion(&id_priv->comp); | |
777 | ||
778 | kfree(id_priv); | |
779 | } | |
780 | ||
781 | static void cma_cancel_listens(struct rdma_id_private *id_priv) | |
782 | { | |
783 | struct rdma_id_private *dev_id_priv; | |
784 | ||
785 | mutex_lock(&lock); | |
786 | list_del(&id_priv->list); | |
787 | ||
788 | while (!list_empty(&id_priv->listen_list)) { | |
789 | dev_id_priv = list_entry(id_priv->listen_list.next, | |
790 | struct rdma_id_private, listen_list); | |
791 | cma_destroy_listen(dev_id_priv); | |
792 | } | |
793 | mutex_unlock(&lock); | |
794 | } | |
795 | ||
796 | static void cma_cancel_operation(struct rdma_id_private *id_priv, | |
797 | enum cma_state state) | |
798 | { | |
799 | switch (state) { | |
800 | case CMA_ADDR_QUERY: | |
801 | rdma_addr_cancel(&id_priv->id.route.addr.dev_addr); | |
802 | break; | |
803 | case CMA_ROUTE_QUERY: | |
804 | cma_cancel_route(id_priv); | |
805 | break; | |
806 | case CMA_LISTEN: | |
807 | if (cma_any_addr(&id_priv->id.route.addr.src_addr) && | |
808 | !id_priv->cma_dev) | |
809 | cma_cancel_listens(id_priv); | |
810 | break; | |
811 | default: | |
812 | break; | |
813 | } | |
814 | } | |
815 | ||
816 | static void cma_release_port(struct rdma_id_private *id_priv) | |
817 | { | |
818 | struct rdma_bind_list *bind_list = id_priv->bind_list; | |
819 | ||
820 | if (!bind_list) | |
821 | return; | |
822 | ||
823 | mutex_lock(&lock); | |
824 | hlist_del(&id_priv->node); | |
825 | if (hlist_empty(&bind_list->owners)) { | |
826 | idr_remove(bind_list->ps, bind_list->port); | |
827 | kfree(bind_list); | |
828 | } | |
829 | mutex_unlock(&lock); | |
830 | } | |
831 | ||
c8f6a362 SH |
832 | static void cma_leave_mc_groups(struct rdma_id_private *id_priv) |
833 | { | |
834 | struct cma_multicast *mc; | |
835 | ||
836 | while (!list_empty(&id_priv->mc_list)) { | |
837 | mc = container_of(id_priv->mc_list.next, | |
838 | struct cma_multicast, list); | |
839 | list_del(&mc->list); | |
840 | ib_sa_free_multicast(mc->multicast.ib); | |
841 | kfree(mc); | |
842 | } | |
843 | } | |
844 | ||
e51060f0 SH |
845 | void rdma_destroy_id(struct rdma_cm_id *id) |
846 | { | |
847 | struct rdma_id_private *id_priv; | |
848 | enum cma_state state; | |
849 | ||
850 | id_priv = container_of(id, struct rdma_id_private, id); | |
851 | state = cma_exch(id_priv, CMA_DESTROYING); | |
852 | cma_cancel_operation(id_priv, state); | |
853 | ||
61a73c70 | 854 | mutex_lock(&lock); |
e51060f0 | 855 | if (id_priv->cma_dev) { |
61a73c70 | 856 | mutex_unlock(&lock); |
07ebafba TT |
857 | switch (rdma_node_get_transport(id->device->node_type)) { |
858 | case RDMA_TRANSPORT_IB: | |
3cd96564 | 859 | if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib)) |
e51060f0 SH |
860 | ib_destroy_cm_id(id_priv->cm_id.ib); |
861 | break; | |
07ebafba TT |
862 | case RDMA_TRANSPORT_IWARP: |
863 | if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw)) | |
864 | iw_destroy_cm_id(id_priv->cm_id.iw); | |
865 | break; | |
e51060f0 SH |
866 | default: |
867 | break; | |
868 | } | |
c8f6a362 | 869 | cma_leave_mc_groups(id_priv); |
3cd96564 | 870 | mutex_lock(&lock); |
e51060f0 | 871 | cma_detach_from_dev(id_priv); |
e51060f0 | 872 | } |
61a73c70 | 873 | mutex_unlock(&lock); |
e51060f0 SH |
874 | |
875 | cma_release_port(id_priv); | |
876 | cma_deref_id(id_priv); | |
877 | wait_for_completion(&id_priv->comp); | |
878 | ||
879 | kfree(id_priv->id.route.path_rec); | |
880 | kfree(id_priv); | |
881 | } | |
882 | EXPORT_SYMBOL(rdma_destroy_id); | |
883 | ||
884 | static int cma_rep_recv(struct rdma_id_private *id_priv) | |
885 | { | |
886 | int ret; | |
887 | ||
c5483388 | 888 | ret = cma_modify_qp_rtr(id_priv); |
e51060f0 SH |
889 | if (ret) |
890 | goto reject; | |
891 | ||
c5483388 | 892 | ret = cma_modify_qp_rts(id_priv); |
e51060f0 SH |
893 | if (ret) |
894 | goto reject; | |
895 | ||
896 | ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0); | |
897 | if (ret) | |
898 | goto reject; | |
899 | ||
900 | return 0; | |
901 | reject: | |
c5483388 | 902 | cma_modify_qp_err(id_priv); |
e51060f0 SH |
903 | ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED, |
904 | NULL, 0, NULL, 0); | |
905 | return ret; | |
906 | } | |
907 | ||
908 | static int cma_verify_rep(struct rdma_id_private *id_priv, void *data) | |
909 | { | |
910 | if (id_priv->id.ps == RDMA_PS_SDP && | |
911 | sdp_get_majv(((struct sdp_hah *) data)->sdp_version) != | |
912 | SDP_MAJ_VERSION) | |
913 | return -EINVAL; | |
914 | ||
915 | return 0; | |
916 | } | |
917 | ||
a1b1b61f SH |
918 | static void cma_set_rep_event_data(struct rdma_cm_event *event, |
919 | struct ib_cm_rep_event_param *rep_data, | |
920 | void *private_data) | |
921 | { | |
922 | event->param.conn.private_data = private_data; | |
923 | event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE; | |
924 | event->param.conn.responder_resources = rep_data->responder_resources; | |
925 | event->param.conn.initiator_depth = rep_data->initiator_depth; | |
926 | event->param.conn.flow_control = rep_data->flow_control; | |
927 | event->param.conn.rnr_retry_count = rep_data->rnr_retry_count; | |
928 | event->param.conn.srq = rep_data->srq; | |
929 | event->param.conn.qp_num = rep_data->remote_qpn; | |
930 | } | |
931 | ||
e51060f0 SH |
932 | static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) |
933 | { | |
934 | struct rdma_id_private *id_priv = cm_id->context; | |
a1b1b61f SH |
935 | struct rdma_cm_event event; |
936 | int ret = 0; | |
e51060f0 | 937 | |
8aa08602 SH |
938 | if (cma_disable_remove(id_priv, CMA_CONNECT)) |
939 | return 0; | |
e51060f0 | 940 | |
a1b1b61f | 941 | memset(&event, 0, sizeof event); |
e51060f0 SH |
942 | switch (ib_event->event) { |
943 | case IB_CM_REQ_ERROR: | |
944 | case IB_CM_REP_ERROR: | |
a1b1b61f SH |
945 | event.event = RDMA_CM_EVENT_UNREACHABLE; |
946 | event.status = -ETIMEDOUT; | |
e51060f0 SH |
947 | break; |
948 | case IB_CM_REP_RECEIVED: | |
a1b1b61f SH |
949 | event.status = cma_verify_rep(id_priv, ib_event->private_data); |
950 | if (event.status) | |
951 | event.event = RDMA_CM_EVENT_CONNECT_ERROR; | |
e51060f0 | 952 | else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) { |
a1b1b61f SH |
953 | event.status = cma_rep_recv(id_priv); |
954 | event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR : | |
955 | RDMA_CM_EVENT_ESTABLISHED; | |
e51060f0 | 956 | } else |
a1b1b61f SH |
957 | event.event = RDMA_CM_EVENT_CONNECT_RESPONSE; |
958 | cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd, | |
959 | ib_event->private_data); | |
e51060f0 SH |
960 | break; |
961 | case IB_CM_RTU_RECEIVED: | |
0fe313b0 SH |
962 | case IB_CM_USER_ESTABLISHED: |
963 | event.event = RDMA_CM_EVENT_ESTABLISHED; | |
e51060f0 SH |
964 | break; |
965 | case IB_CM_DREQ_ERROR: | |
a1b1b61f | 966 | event.status = -ETIMEDOUT; /* fall through */ |
e51060f0 SH |
967 | case IB_CM_DREQ_RECEIVED: |
968 | case IB_CM_DREP_RECEIVED: | |
969 | if (!cma_comp_exch(id_priv, CMA_CONNECT, CMA_DISCONNECT)) | |
970 | goto out; | |
a1b1b61f | 971 | event.event = RDMA_CM_EVENT_DISCONNECTED; |
e51060f0 SH |
972 | break; |
973 | case IB_CM_TIMEWAIT_EXIT: | |
974 | case IB_CM_MRA_RECEIVED: | |
975 | /* ignore event */ | |
976 | goto out; | |
977 | case IB_CM_REJ_RECEIVED: | |
c5483388 | 978 | cma_modify_qp_err(id_priv); |
a1b1b61f SH |
979 | event.status = ib_event->param.rej_rcvd.reason; |
980 | event.event = RDMA_CM_EVENT_REJECTED; | |
981 | event.param.conn.private_data = ib_event->private_data; | |
982 | event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; | |
e51060f0 SH |
983 | break; |
984 | default: | |
985 | printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d", | |
986 | ib_event->event); | |
987 | goto out; | |
988 | } | |
989 | ||
a1b1b61f | 990 | ret = id_priv->id.event_handler(&id_priv->id, &event); |
e51060f0 SH |
991 | if (ret) { |
992 | /* Destroy the CM ID by returning a non-zero value. */ | |
993 | id_priv->cm_id.ib = NULL; | |
994 | cma_exch(id_priv, CMA_DESTROYING); | |
8aa08602 | 995 | cma_enable_remove(id_priv); |
e51060f0 SH |
996 | rdma_destroy_id(&id_priv->id); |
997 | return ret; | |
998 | } | |
999 | out: | |
8aa08602 | 1000 | cma_enable_remove(id_priv); |
e51060f0 SH |
1001 | return ret; |
1002 | } | |
1003 | ||
628e5f6d SH |
1004 | static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id, |
1005 | struct ib_cm_event *ib_event) | |
e51060f0 SH |
1006 | { |
1007 | struct rdma_id_private *id_priv; | |
1008 | struct rdma_cm_id *id; | |
1009 | struct rdma_route *rt; | |
1010 | union cma_ip_addr *src, *dst; | |
1011 | __u16 port; | |
1012 | u8 ip_ver; | |
1013 | ||
3f168d2b KK |
1014 | if (cma_get_net_info(ib_event->private_data, listen_id->ps, |
1015 | &ip_ver, &port, &src, &dst)) | |
1016 | goto err; | |
1017 | ||
e51060f0 SH |
1018 | id = rdma_create_id(listen_id->event_handler, listen_id->context, |
1019 | listen_id->ps); | |
1020 | if (IS_ERR(id)) | |
3f168d2b KK |
1021 | goto err; |
1022 | ||
1023 | cma_save_net_info(&id->route.addr, &listen_id->route.addr, | |
1024 | ip_ver, port, src, dst); | |
e51060f0 SH |
1025 | |
1026 | rt = &id->route; | |
1027 | rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1; | |
3f168d2b KK |
1028 | rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths, |
1029 | GFP_KERNEL); | |
e51060f0 | 1030 | if (!rt->path_rec) |
3f168d2b | 1031 | goto destroy_id; |
e51060f0 | 1032 | |
e51060f0 SH |
1033 | rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path; |
1034 | if (rt->num_paths == 2) | |
1035 | rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path; | |
1036 | ||
1037 | ib_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid); | |
1038 | ib_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid); | |
1039 | ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey)); | |
07ebafba | 1040 | rt->addr.dev_addr.dev_type = RDMA_NODE_IB_CA; |
e51060f0 SH |
1041 | |
1042 | id_priv = container_of(id, struct rdma_id_private, id); | |
1043 | id_priv->state = CMA_CONNECT; | |
1044 | return id_priv; | |
3f168d2b KK |
1045 | |
1046 | destroy_id: | |
e51060f0 | 1047 | rdma_destroy_id(id); |
3f168d2b | 1048 | err: |
e51060f0 SH |
1049 | return NULL; |
1050 | } | |
1051 | ||
628e5f6d SH |
1052 | static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id, |
1053 | struct ib_cm_event *ib_event) | |
1054 | { | |
1055 | struct rdma_id_private *id_priv; | |
1056 | struct rdma_cm_id *id; | |
1057 | union cma_ip_addr *src, *dst; | |
1058 | __u16 port; | |
1059 | u8 ip_ver; | |
1060 | int ret; | |
1061 | ||
1062 | id = rdma_create_id(listen_id->event_handler, listen_id->context, | |
1063 | listen_id->ps); | |
1064 | if (IS_ERR(id)) | |
1065 | return NULL; | |
1066 | ||
1067 | ||
1068 | if (cma_get_net_info(ib_event->private_data, listen_id->ps, | |
1069 | &ip_ver, &port, &src, &dst)) | |
1070 | goto err; | |
1071 | ||
1072 | cma_save_net_info(&id->route.addr, &listen_id->route.addr, | |
1073 | ip_ver, port, src, dst); | |
1074 | ||
1075 | ret = rdma_translate_ip(&id->route.addr.src_addr, | |
1076 | &id->route.addr.dev_addr); | |
1077 | if (ret) | |
1078 | goto err; | |
1079 | ||
1080 | id_priv = container_of(id, struct rdma_id_private, id); | |
1081 | id_priv->state = CMA_CONNECT; | |
1082 | return id_priv; | |
1083 | err: | |
1084 | rdma_destroy_id(id); | |
1085 | return NULL; | |
1086 | } | |
1087 | ||
a1b1b61f SH |
1088 | static void cma_set_req_event_data(struct rdma_cm_event *event, |
1089 | struct ib_cm_req_event_param *req_data, | |
1090 | void *private_data, int offset) | |
1091 | { | |
1092 | event->param.conn.private_data = private_data + offset; | |
1093 | event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset; | |
1094 | event->param.conn.responder_resources = req_data->responder_resources; | |
1095 | event->param.conn.initiator_depth = req_data->initiator_depth; | |
1096 | event->param.conn.flow_control = req_data->flow_control; | |
1097 | event->param.conn.retry_count = req_data->retry_count; | |
1098 | event->param.conn.rnr_retry_count = req_data->rnr_retry_count; | |
1099 | event->param.conn.srq = req_data->srq; | |
1100 | event->param.conn.qp_num = req_data->remote_qpn; | |
1101 | } | |
1102 | ||
e51060f0 SH |
1103 | static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) |
1104 | { | |
1105 | struct rdma_id_private *listen_id, *conn_id; | |
a1b1b61f | 1106 | struct rdma_cm_event event; |
e51060f0 SH |
1107 | int offset, ret; |
1108 | ||
1109 | listen_id = cm_id->context; | |
8aa08602 SH |
1110 | if (cma_disable_remove(listen_id, CMA_LISTEN)) |
1111 | return -ECONNABORTED; | |
e51060f0 | 1112 | |
628e5f6d SH |
1113 | memset(&event, 0, sizeof event); |
1114 | offset = cma_user_data_offset(listen_id->id.ps); | |
1115 | event.event = RDMA_CM_EVENT_CONNECT_REQUEST; | |
c8f6a362 | 1116 | if (cma_is_ud_ps(listen_id->id.ps)) { |
628e5f6d SH |
1117 | conn_id = cma_new_udp_id(&listen_id->id, ib_event); |
1118 | event.param.ud.private_data = ib_event->private_data + offset; | |
1119 | event.param.ud.private_data_len = | |
1120 | IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset; | |
1121 | } else { | |
dcb3f974 | 1122 | ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0); |
628e5f6d SH |
1123 | conn_id = cma_new_conn_id(&listen_id->id, ib_event); |
1124 | cma_set_req_event_data(&event, &ib_event->param.req_rcvd, | |
1125 | ib_event->private_data, offset); | |
1126 | } | |
e51060f0 SH |
1127 | if (!conn_id) { |
1128 | ret = -ENOMEM; | |
1129 | goto out; | |
1130 | } | |
1131 | ||
1132 | atomic_inc(&conn_id->dev_remove); | |
61a73c70 | 1133 | mutex_lock(&lock); |
07ebafba | 1134 | ret = cma_acquire_dev(conn_id); |
61a73c70 | 1135 | mutex_unlock(&lock); |
a1a733f6 KK |
1136 | if (ret) |
1137 | goto release_conn_id; | |
e51060f0 SH |
1138 | |
1139 | conn_id->cm_id.ib = cm_id; | |
1140 | cm_id->context = conn_id; | |
1141 | cm_id->cm_handler = cma_ib_handler; | |
1142 | ||
a1b1b61f | 1143 | ret = conn_id->id.event_handler(&conn_id->id, &event); |
a1a733f6 KK |
1144 | if (!ret) |
1145 | goto out; | |
1146 | ||
1147 | /* Destroy the CM ID by returning a non-zero value. */ | |
1148 | conn_id->cm_id.ib = NULL; | |
1149 | ||
1150 | release_conn_id: | |
1151 | cma_exch(conn_id, CMA_DESTROYING); | |
8aa08602 | 1152 | cma_enable_remove(conn_id); |
a1a733f6 KK |
1153 | rdma_destroy_id(&conn_id->id); |
1154 | ||
e51060f0 | 1155 | out: |
8aa08602 | 1156 | cma_enable_remove(listen_id); |
e51060f0 SH |
1157 | return ret; |
1158 | } | |
1159 | ||
1160 | static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr) | |
1161 | { | |
628e5f6d | 1162 | return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr))); |
e51060f0 SH |
1163 | } |
1164 | ||
1165 | static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr, | |
1166 | struct ib_cm_compare_data *compare) | |
1167 | { | |
1168 | struct cma_hdr *cma_data, *cma_mask; | |
1169 | struct sdp_hh *sdp_data, *sdp_mask; | |
1170 | __u32 ip4_addr; | |
1171 | struct in6_addr ip6_addr; | |
1172 | ||
1173 | memset(compare, 0, sizeof *compare); | |
1174 | cma_data = (void *) compare->data; | |
1175 | cma_mask = (void *) compare->mask; | |
1176 | sdp_data = (void *) compare->data; | |
1177 | sdp_mask = (void *) compare->mask; | |
1178 | ||
1179 | switch (addr->sa_family) { | |
1180 | case AF_INET: | |
1181 | ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr; | |
1182 | if (ps == RDMA_PS_SDP) { | |
1183 | sdp_set_ip_ver(sdp_data, 4); | |
1184 | sdp_set_ip_ver(sdp_mask, 0xF); | |
1185 | sdp_data->dst_addr.ip4.addr = ip4_addr; | |
1186 | sdp_mask->dst_addr.ip4.addr = ~0; | |
1187 | } else { | |
1188 | cma_set_ip_ver(cma_data, 4); | |
1189 | cma_set_ip_ver(cma_mask, 0xF); | |
1190 | cma_data->dst_addr.ip4.addr = ip4_addr; | |
1191 | cma_mask->dst_addr.ip4.addr = ~0; | |
1192 | } | |
1193 | break; | |
1194 | case AF_INET6: | |
1195 | ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr; | |
1196 | if (ps == RDMA_PS_SDP) { | |
1197 | sdp_set_ip_ver(sdp_data, 6); | |
1198 | sdp_set_ip_ver(sdp_mask, 0xF); | |
1199 | sdp_data->dst_addr.ip6 = ip6_addr; | |
1200 | memset(&sdp_mask->dst_addr.ip6, 0xFF, | |
1201 | sizeof sdp_mask->dst_addr.ip6); | |
1202 | } else { | |
1203 | cma_set_ip_ver(cma_data, 6); | |
1204 | cma_set_ip_ver(cma_mask, 0xF); | |
1205 | cma_data->dst_addr.ip6 = ip6_addr; | |
1206 | memset(&cma_mask->dst_addr.ip6, 0xFF, | |
1207 | sizeof cma_mask->dst_addr.ip6); | |
1208 | } | |
1209 | break; | |
1210 | default: | |
1211 | break; | |
1212 | } | |
1213 | } | |
1214 | ||
07ebafba TT |
1215 | static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event) |
1216 | { | |
1217 | struct rdma_id_private *id_priv = iw_id->context; | |
a1b1b61f | 1218 | struct rdma_cm_event event; |
07ebafba TT |
1219 | struct sockaddr_in *sin; |
1220 | int ret = 0; | |
1221 | ||
be65f086 SH |
1222 | if (cma_disable_remove(id_priv, CMA_CONNECT)) |
1223 | return 0; | |
07ebafba | 1224 | |
be65f086 | 1225 | memset(&event, 0, sizeof event); |
07ebafba TT |
1226 | switch (iw_event->event) { |
1227 | case IW_CM_EVENT_CLOSE: | |
a1b1b61f | 1228 | event.event = RDMA_CM_EVENT_DISCONNECTED; |
07ebafba TT |
1229 | break; |
1230 | case IW_CM_EVENT_CONNECT_REPLY: | |
1231 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; | |
1232 | *sin = iw_event->local_addr; | |
1233 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr; | |
1234 | *sin = iw_event->remote_addr; | |
881a045f SW |
1235 | switch (iw_event->status) { |
1236 | case 0: | |
a1b1b61f | 1237 | event.event = RDMA_CM_EVENT_ESTABLISHED; |
881a045f SW |
1238 | break; |
1239 | case -ECONNRESET: | |
1240 | case -ECONNREFUSED: | |
1241 | event.event = RDMA_CM_EVENT_REJECTED; | |
1242 | break; | |
1243 | case -ETIMEDOUT: | |
1244 | event.event = RDMA_CM_EVENT_UNREACHABLE; | |
1245 | break; | |
1246 | default: | |
1247 | event.event = RDMA_CM_EVENT_CONNECT_ERROR; | |
1248 | break; | |
1249 | } | |
07ebafba TT |
1250 | break; |
1251 | case IW_CM_EVENT_ESTABLISHED: | |
a1b1b61f | 1252 | event.event = RDMA_CM_EVENT_ESTABLISHED; |
07ebafba TT |
1253 | break; |
1254 | default: | |
1255 | BUG_ON(1); | |
1256 | } | |
1257 | ||
a1b1b61f SH |
1258 | event.status = iw_event->status; |
1259 | event.param.conn.private_data = iw_event->private_data; | |
1260 | event.param.conn.private_data_len = iw_event->private_data_len; | |
1261 | ret = id_priv->id.event_handler(&id_priv->id, &event); | |
07ebafba TT |
1262 | if (ret) { |
1263 | /* Destroy the CM ID by returning a non-zero value. */ | |
1264 | id_priv->cm_id.iw = NULL; | |
1265 | cma_exch(id_priv, CMA_DESTROYING); | |
8aa08602 | 1266 | cma_enable_remove(id_priv); |
07ebafba TT |
1267 | rdma_destroy_id(&id_priv->id); |
1268 | return ret; | |
1269 | } | |
1270 | ||
8aa08602 | 1271 | cma_enable_remove(id_priv); |
07ebafba TT |
1272 | return ret; |
1273 | } | |
1274 | ||
1275 | static int iw_conn_req_handler(struct iw_cm_id *cm_id, | |
1276 | struct iw_cm_event *iw_event) | |
1277 | { | |
1278 | struct rdma_cm_id *new_cm_id; | |
1279 | struct rdma_id_private *listen_id, *conn_id; | |
1280 | struct sockaddr_in *sin; | |
1281 | struct net_device *dev = NULL; | |
a1b1b61f | 1282 | struct rdma_cm_event event; |
07ebafba TT |
1283 | int ret; |
1284 | ||
1285 | listen_id = cm_id->context; | |
8aa08602 SH |
1286 | if (cma_disable_remove(listen_id, CMA_LISTEN)) |
1287 | return -ECONNABORTED; | |
07ebafba TT |
1288 | |
1289 | /* Create a new RDMA id for the new IW CM ID */ | |
1290 | new_cm_id = rdma_create_id(listen_id->id.event_handler, | |
1291 | listen_id->id.context, | |
1292 | RDMA_PS_TCP); | |
1293 | if (!new_cm_id) { | |
1294 | ret = -ENOMEM; | |
1295 | goto out; | |
1296 | } | |
1297 | conn_id = container_of(new_cm_id, struct rdma_id_private, id); | |
1298 | atomic_inc(&conn_id->dev_remove); | |
1299 | conn_id->state = CMA_CONNECT; | |
1300 | ||
1301 | dev = ip_dev_find(iw_event->local_addr.sin_addr.s_addr); | |
1302 | if (!dev) { | |
1303 | ret = -EADDRNOTAVAIL; | |
8aa08602 | 1304 | cma_enable_remove(conn_id); |
07ebafba TT |
1305 | rdma_destroy_id(new_cm_id); |
1306 | goto out; | |
1307 | } | |
1308 | ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL); | |
1309 | if (ret) { | |
8aa08602 | 1310 | cma_enable_remove(conn_id); |
07ebafba TT |
1311 | rdma_destroy_id(new_cm_id); |
1312 | goto out; | |
1313 | } | |
1314 | ||
61a73c70 | 1315 | mutex_lock(&lock); |
07ebafba | 1316 | ret = cma_acquire_dev(conn_id); |
61a73c70 | 1317 | mutex_unlock(&lock); |
07ebafba | 1318 | if (ret) { |
8aa08602 | 1319 | cma_enable_remove(conn_id); |
07ebafba TT |
1320 | rdma_destroy_id(new_cm_id); |
1321 | goto out; | |
1322 | } | |
1323 | ||
1324 | conn_id->cm_id.iw = cm_id; | |
1325 | cm_id->context = conn_id; | |
1326 | cm_id->cm_handler = cma_iw_handler; | |
1327 | ||
1328 | sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr; | |
1329 | *sin = iw_event->local_addr; | |
1330 | sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr; | |
1331 | *sin = iw_event->remote_addr; | |
1332 | ||
a1b1b61f SH |
1333 | memset(&event, 0, sizeof event); |
1334 | event.event = RDMA_CM_EVENT_CONNECT_REQUEST; | |
1335 | event.param.conn.private_data = iw_event->private_data; | |
1336 | event.param.conn.private_data_len = iw_event->private_data_len; | |
1337 | ret = conn_id->id.event_handler(&conn_id->id, &event); | |
07ebafba TT |
1338 | if (ret) { |
1339 | /* User wants to destroy the CM ID */ | |
1340 | conn_id->cm_id.iw = NULL; | |
1341 | cma_exch(conn_id, CMA_DESTROYING); | |
8aa08602 | 1342 | cma_enable_remove(conn_id); |
07ebafba TT |
1343 | rdma_destroy_id(&conn_id->id); |
1344 | } | |
1345 | ||
1346 | out: | |
1347 | if (dev) | |
1348 | dev_put(dev); | |
8aa08602 | 1349 | cma_enable_remove(listen_id); |
07ebafba TT |
1350 | return ret; |
1351 | } | |
1352 | ||
e51060f0 SH |
1353 | static int cma_ib_listen(struct rdma_id_private *id_priv) |
1354 | { | |
1355 | struct ib_cm_compare_data compare_data; | |
1356 | struct sockaddr *addr; | |
1357 | __be64 svc_id; | |
1358 | int ret; | |
1359 | ||
1360 | id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_req_handler, | |
1361 | id_priv); | |
1362 | if (IS_ERR(id_priv->cm_id.ib)) | |
1363 | return PTR_ERR(id_priv->cm_id.ib); | |
1364 | ||
1365 | addr = &id_priv->id.route.addr.src_addr; | |
1366 | svc_id = cma_get_service_id(id_priv->id.ps, addr); | |
1367 | if (cma_any_addr(addr)) | |
1368 | ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL); | |
1369 | else { | |
1370 | cma_set_compare_data(id_priv->id.ps, addr, &compare_data); | |
1371 | ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data); | |
1372 | } | |
1373 | ||
1374 | if (ret) { | |
1375 | ib_destroy_cm_id(id_priv->cm_id.ib); | |
1376 | id_priv->cm_id.ib = NULL; | |
1377 | } | |
1378 | ||
1379 | return ret; | |
1380 | } | |
1381 | ||
07ebafba TT |
1382 | static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog) |
1383 | { | |
1384 | int ret; | |
1385 | struct sockaddr_in *sin; | |
1386 | ||
1387 | id_priv->cm_id.iw = iw_create_cm_id(id_priv->id.device, | |
1388 | iw_conn_req_handler, | |
1389 | id_priv); | |
1390 | if (IS_ERR(id_priv->cm_id.iw)) | |
1391 | return PTR_ERR(id_priv->cm_id.iw); | |
1392 | ||
1393 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; | |
1394 | id_priv->cm_id.iw->local_addr = *sin; | |
1395 | ||
1396 | ret = iw_cm_listen(id_priv->cm_id.iw, backlog); | |
1397 | ||
1398 | if (ret) { | |
1399 | iw_destroy_cm_id(id_priv->cm_id.iw); | |
1400 | id_priv->cm_id.iw = NULL; | |
1401 | } | |
1402 | ||
1403 | return ret; | |
1404 | } | |
1405 | ||
e51060f0 SH |
1406 | static int cma_listen_handler(struct rdma_cm_id *id, |
1407 | struct rdma_cm_event *event) | |
1408 | { | |
1409 | struct rdma_id_private *id_priv = id->context; | |
1410 | ||
1411 | id->context = id_priv->id.context; | |
1412 | id->event_handler = id_priv->id.event_handler; | |
1413 | return id_priv->id.event_handler(id, event); | |
1414 | } | |
1415 | ||
1416 | static void cma_listen_on_dev(struct rdma_id_private *id_priv, | |
1417 | struct cma_device *cma_dev) | |
1418 | { | |
1419 | struct rdma_id_private *dev_id_priv; | |
1420 | struct rdma_cm_id *id; | |
1421 | int ret; | |
1422 | ||
1423 | id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps); | |
1424 | if (IS_ERR(id)) | |
1425 | return; | |
1426 | ||
1427 | dev_id_priv = container_of(id, struct rdma_id_private, id); | |
1428 | ||
1429 | dev_id_priv->state = CMA_ADDR_BOUND; | |
1430 | memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr, | |
1431 | ip_addr_size(&id_priv->id.route.addr.src_addr)); | |
1432 | ||
1433 | cma_attach_to_dev(dev_id_priv, cma_dev); | |
1434 | list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list); | |
1435 | ||
1436 | ret = rdma_listen(id, id_priv->backlog); | |
1437 | if (ret) | |
1438 | goto err; | |
1439 | ||
1440 | return; | |
1441 | err: | |
1442 | cma_destroy_listen(dev_id_priv); | |
1443 | } | |
1444 | ||
1445 | static void cma_listen_on_all(struct rdma_id_private *id_priv) | |
1446 | { | |
1447 | struct cma_device *cma_dev; | |
1448 | ||
1449 | mutex_lock(&lock); | |
1450 | list_add_tail(&id_priv->list, &listen_any_list); | |
1451 | list_for_each_entry(cma_dev, &dev_list, list) | |
1452 | cma_listen_on_dev(id_priv, cma_dev); | |
1453 | mutex_unlock(&lock); | |
1454 | } | |
1455 | ||
1456 | static int cma_bind_any(struct rdma_cm_id *id, sa_family_t af) | |
1457 | { | |
1458 | struct sockaddr_in addr_in; | |
1459 | ||
1460 | memset(&addr_in, 0, sizeof addr_in); | |
1461 | addr_in.sin_family = af; | |
1462 | return rdma_bind_addr(id, (struct sockaddr *) &addr_in); | |
1463 | } | |
1464 | ||
1465 | int rdma_listen(struct rdma_cm_id *id, int backlog) | |
1466 | { | |
1467 | struct rdma_id_private *id_priv; | |
1468 | int ret; | |
1469 | ||
1470 | id_priv = container_of(id, struct rdma_id_private, id); | |
1471 | if (id_priv->state == CMA_IDLE) { | |
1472 | ret = cma_bind_any(id, AF_INET); | |
1473 | if (ret) | |
1474 | return ret; | |
1475 | } | |
1476 | ||
1477 | if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_LISTEN)) | |
1478 | return -EINVAL; | |
1479 | ||
1480 | id_priv->backlog = backlog; | |
1481 | if (id->device) { | |
07ebafba TT |
1482 | switch (rdma_node_get_transport(id->device->node_type)) { |
1483 | case RDMA_TRANSPORT_IB: | |
e51060f0 SH |
1484 | ret = cma_ib_listen(id_priv); |
1485 | if (ret) | |
1486 | goto err; | |
1487 | break; | |
07ebafba TT |
1488 | case RDMA_TRANSPORT_IWARP: |
1489 | ret = cma_iw_listen(id_priv, backlog); | |
1490 | if (ret) | |
1491 | goto err; | |
1492 | break; | |
e51060f0 SH |
1493 | default: |
1494 | ret = -ENOSYS; | |
1495 | goto err; | |
1496 | } | |
1497 | } else | |
1498 | cma_listen_on_all(id_priv); | |
1499 | ||
1500 | return 0; | |
1501 | err: | |
1502 | id_priv->backlog = 0; | |
1503 | cma_comp_exch(id_priv, CMA_LISTEN, CMA_ADDR_BOUND); | |
1504 | return ret; | |
1505 | } | |
1506 | EXPORT_SYMBOL(rdma_listen); | |
1507 | ||
a81c994d SH |
1508 | void rdma_set_service_type(struct rdma_cm_id *id, int tos) |
1509 | { | |
1510 | struct rdma_id_private *id_priv; | |
1511 | ||
1512 | id_priv = container_of(id, struct rdma_id_private, id); | |
1513 | id_priv->tos = (u8) tos; | |
1514 | } | |
1515 | EXPORT_SYMBOL(rdma_set_service_type); | |
1516 | ||
e51060f0 SH |
1517 | static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec, |
1518 | void *context) | |
1519 | { | |
1520 | struct cma_work *work = context; | |
1521 | struct rdma_route *route; | |
1522 | ||
1523 | route = &work->id->id.route; | |
1524 | ||
1525 | if (!status) { | |
1526 | route->num_paths = 1; | |
1527 | *route->path_rec = *path_rec; | |
1528 | } else { | |
1529 | work->old_state = CMA_ROUTE_QUERY; | |
1530 | work->new_state = CMA_ADDR_RESOLVED; | |
1531 | work->event.event = RDMA_CM_EVENT_ROUTE_ERROR; | |
8f0472d3 | 1532 | work->event.status = status; |
e51060f0 SH |
1533 | } |
1534 | ||
1535 | queue_work(cma_wq, &work->work); | |
1536 | } | |
1537 | ||
1538 | static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms, | |
1539 | struct cma_work *work) | |
1540 | { | |
a81c994d | 1541 | struct rdma_addr *addr = &id_priv->id.route.addr; |
e51060f0 | 1542 | struct ib_sa_path_rec path_rec; |
a81c994d SH |
1543 | ib_sa_comp_mask comp_mask; |
1544 | struct sockaddr_in6 *sin6; | |
e51060f0 SH |
1545 | |
1546 | memset(&path_rec, 0, sizeof path_rec); | |
a81c994d SH |
1547 | ib_addr_get_sgid(&addr->dev_addr, &path_rec.sgid); |
1548 | ib_addr_get_dgid(&addr->dev_addr, &path_rec.dgid); | |
1549 | path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(&addr->dev_addr)); | |
e51060f0 | 1550 | path_rec.numb_path = 1; |
962063e6 | 1551 | path_rec.reversible = 1; |
a81c994d SH |
1552 | path_rec.service_id = cma_get_service_id(id_priv->id.ps, &addr->dst_addr); |
1553 | ||
1554 | comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID | | |
1555 | IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH | | |
1556 | IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID; | |
1557 | ||
1558 | if (addr->src_addr.sa_family == AF_INET) { | |
1559 | path_rec.qos_class = cpu_to_be16((u16) id_priv->tos); | |
1560 | comp_mask |= IB_SA_PATH_REC_QOS_CLASS; | |
1561 | } else { | |
1562 | sin6 = (struct sockaddr_in6 *) &addr->src_addr; | |
1563 | path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20); | |
1564 | comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS; | |
1565 | } | |
e51060f0 | 1566 | |
c1a0b23b | 1567 | id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device, |
a81c994d SH |
1568 | id_priv->id.port_num, &path_rec, |
1569 | comp_mask, timeout_ms, | |
1570 | GFP_KERNEL, cma_query_handler, | |
1571 | work, &id_priv->query); | |
e51060f0 SH |
1572 | |
1573 | return (id_priv->query_id < 0) ? id_priv->query_id : 0; | |
1574 | } | |
1575 | ||
c4028958 | 1576 | static void cma_work_handler(struct work_struct *_work) |
e51060f0 | 1577 | { |
c4028958 | 1578 | struct cma_work *work = container_of(_work, struct cma_work, work); |
e51060f0 SH |
1579 | struct rdma_id_private *id_priv = work->id; |
1580 | int destroy = 0; | |
1581 | ||
1582 | atomic_inc(&id_priv->dev_remove); | |
1583 | if (!cma_comp_exch(id_priv, work->old_state, work->new_state)) | |
1584 | goto out; | |
1585 | ||
1586 | if (id_priv->id.event_handler(&id_priv->id, &work->event)) { | |
1587 | cma_exch(id_priv, CMA_DESTROYING); | |
1588 | destroy = 1; | |
1589 | } | |
1590 | out: | |
8aa08602 | 1591 | cma_enable_remove(id_priv); |
e51060f0 SH |
1592 | cma_deref_id(id_priv); |
1593 | if (destroy) | |
1594 | rdma_destroy_id(&id_priv->id); | |
1595 | kfree(work); | |
1596 | } | |
1597 | ||
1598 | static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms) | |
1599 | { | |
1600 | struct rdma_route *route = &id_priv->id.route; | |
1601 | struct cma_work *work; | |
1602 | int ret; | |
1603 | ||
1604 | work = kzalloc(sizeof *work, GFP_KERNEL); | |
1605 | if (!work) | |
1606 | return -ENOMEM; | |
1607 | ||
1608 | work->id = id_priv; | |
c4028958 | 1609 | INIT_WORK(&work->work, cma_work_handler); |
e51060f0 SH |
1610 | work->old_state = CMA_ROUTE_QUERY; |
1611 | work->new_state = CMA_ROUTE_RESOLVED; | |
1612 | work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; | |
1613 | ||
1614 | route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL); | |
1615 | if (!route->path_rec) { | |
1616 | ret = -ENOMEM; | |
1617 | goto err1; | |
1618 | } | |
1619 | ||
1620 | ret = cma_query_ib_route(id_priv, timeout_ms, work); | |
1621 | if (ret) | |
1622 | goto err2; | |
1623 | ||
1624 | return 0; | |
1625 | err2: | |
1626 | kfree(route->path_rec); | |
1627 | route->path_rec = NULL; | |
1628 | err1: | |
1629 | kfree(work); | |
1630 | return ret; | |
1631 | } | |
1632 | ||
1633 | int rdma_set_ib_paths(struct rdma_cm_id *id, | |
1634 | struct ib_sa_path_rec *path_rec, int num_paths) | |
1635 | { | |
1636 | struct rdma_id_private *id_priv; | |
1637 | int ret; | |
1638 | ||
1639 | id_priv = container_of(id, struct rdma_id_private, id); | |
1640 | if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_RESOLVED)) | |
1641 | return -EINVAL; | |
1642 | ||
1643 | id->route.path_rec = kmalloc(sizeof *path_rec * num_paths, GFP_KERNEL); | |
1644 | if (!id->route.path_rec) { | |
1645 | ret = -ENOMEM; | |
1646 | goto err; | |
1647 | } | |
1648 | ||
1649 | memcpy(id->route.path_rec, path_rec, sizeof *path_rec * num_paths); | |
1650 | return 0; | |
1651 | err: | |
1652 | cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_ADDR_RESOLVED); | |
1653 | return ret; | |
1654 | } | |
1655 | EXPORT_SYMBOL(rdma_set_ib_paths); | |
1656 | ||
07ebafba TT |
1657 | static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms) |
1658 | { | |
1659 | struct cma_work *work; | |
1660 | ||
1661 | work = kzalloc(sizeof *work, GFP_KERNEL); | |
1662 | if (!work) | |
1663 | return -ENOMEM; | |
1664 | ||
1665 | work->id = id_priv; | |
c4028958 | 1666 | INIT_WORK(&work->work, cma_work_handler); |
07ebafba TT |
1667 | work->old_state = CMA_ROUTE_QUERY; |
1668 | work->new_state = CMA_ROUTE_RESOLVED; | |
1669 | work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; | |
1670 | queue_work(cma_wq, &work->work); | |
1671 | return 0; | |
1672 | } | |
1673 | ||
e51060f0 SH |
1674 | int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms) |
1675 | { | |
1676 | struct rdma_id_private *id_priv; | |
1677 | int ret; | |
1678 | ||
1679 | id_priv = container_of(id, struct rdma_id_private, id); | |
1680 | if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_QUERY)) | |
1681 | return -EINVAL; | |
1682 | ||
1683 | atomic_inc(&id_priv->refcount); | |
07ebafba TT |
1684 | switch (rdma_node_get_transport(id->device->node_type)) { |
1685 | case RDMA_TRANSPORT_IB: | |
e51060f0 SH |
1686 | ret = cma_resolve_ib_route(id_priv, timeout_ms); |
1687 | break; | |
07ebafba TT |
1688 | case RDMA_TRANSPORT_IWARP: |
1689 | ret = cma_resolve_iw_route(id_priv, timeout_ms); | |
1690 | break; | |
e51060f0 SH |
1691 | default: |
1692 | ret = -ENOSYS; | |
1693 | break; | |
1694 | } | |
1695 | if (ret) | |
1696 | goto err; | |
1697 | ||
1698 | return 0; | |
1699 | err: | |
1700 | cma_comp_exch(id_priv, CMA_ROUTE_QUERY, CMA_ADDR_RESOLVED); | |
1701 | cma_deref_id(id_priv); | |
1702 | return ret; | |
1703 | } | |
1704 | EXPORT_SYMBOL(rdma_resolve_route); | |
1705 | ||
1706 | static int cma_bind_loopback(struct rdma_id_private *id_priv) | |
1707 | { | |
1708 | struct cma_device *cma_dev; | |
1709 | struct ib_port_attr port_attr; | |
f0ee3404 | 1710 | union ib_gid gid; |
e51060f0 SH |
1711 | u16 pkey; |
1712 | int ret; | |
1713 | u8 p; | |
1714 | ||
1715 | mutex_lock(&lock); | |
e82153b5 KK |
1716 | if (list_empty(&dev_list)) { |
1717 | ret = -ENODEV; | |
1718 | goto out; | |
1719 | } | |
e51060f0 SH |
1720 | list_for_each_entry(cma_dev, &dev_list, list) |
1721 | for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p) | |
e82153b5 | 1722 | if (!ib_query_port(cma_dev->device, p, &port_attr) && |
e51060f0 SH |
1723 | port_attr.state == IB_PORT_ACTIVE) |
1724 | goto port_found; | |
1725 | ||
e82153b5 KK |
1726 | p = 1; |
1727 | cma_dev = list_entry(dev_list.next, struct cma_device, list); | |
e51060f0 SH |
1728 | |
1729 | port_found: | |
f0ee3404 | 1730 | ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid); |
e51060f0 SH |
1731 | if (ret) |
1732 | goto out; | |
1733 | ||
1734 | ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey); | |
1735 | if (ret) | |
1736 | goto out; | |
1737 | ||
f0ee3404 | 1738 | ib_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid); |
e51060f0 SH |
1739 | ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey); |
1740 | id_priv->id.port_num = p; | |
1741 | cma_attach_to_dev(id_priv, cma_dev); | |
1742 | out: | |
1743 | mutex_unlock(&lock); | |
1744 | return ret; | |
1745 | } | |
1746 | ||
1747 | static void addr_handler(int status, struct sockaddr *src_addr, | |
1748 | struct rdma_dev_addr *dev_addr, void *context) | |
1749 | { | |
1750 | struct rdma_id_private *id_priv = context; | |
a1b1b61f | 1751 | struct rdma_cm_event event; |
e51060f0 | 1752 | |
a1b1b61f | 1753 | memset(&event, 0, sizeof event); |
e51060f0 | 1754 | atomic_inc(&id_priv->dev_remove); |
61a73c70 SH |
1755 | |
1756 | /* | |
1757 | * Grab mutex to block rdma_destroy_id() from removing the device while | |
1758 | * we're trying to acquire it. | |
1759 | */ | |
1760 | mutex_lock(&lock); | |
1761 | if (!cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_RESOLVED)) { | |
1762 | mutex_unlock(&lock); | |
1763 | goto out; | |
1764 | } | |
1765 | ||
1766 | if (!status && !id_priv->cma_dev) | |
e51060f0 | 1767 | status = cma_acquire_dev(id_priv); |
61a73c70 | 1768 | mutex_unlock(&lock); |
e51060f0 SH |
1769 | |
1770 | if (status) { | |
61a73c70 | 1771 | if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ADDR_BOUND)) |
e51060f0 | 1772 | goto out; |
a1b1b61f SH |
1773 | event.event = RDMA_CM_EVENT_ADDR_ERROR; |
1774 | event.status = status; | |
e51060f0 | 1775 | } else { |
e51060f0 SH |
1776 | memcpy(&id_priv->id.route.addr.src_addr, src_addr, |
1777 | ip_addr_size(src_addr)); | |
a1b1b61f | 1778 | event.event = RDMA_CM_EVENT_ADDR_RESOLVED; |
e51060f0 SH |
1779 | } |
1780 | ||
a1b1b61f | 1781 | if (id_priv->id.event_handler(&id_priv->id, &event)) { |
e51060f0 | 1782 | cma_exch(id_priv, CMA_DESTROYING); |
8aa08602 | 1783 | cma_enable_remove(id_priv); |
e51060f0 SH |
1784 | cma_deref_id(id_priv); |
1785 | rdma_destroy_id(&id_priv->id); | |
1786 | return; | |
1787 | } | |
1788 | out: | |
8aa08602 | 1789 | cma_enable_remove(id_priv); |
e51060f0 SH |
1790 | cma_deref_id(id_priv); |
1791 | } | |
1792 | ||
1793 | static int cma_resolve_loopback(struct rdma_id_private *id_priv) | |
1794 | { | |
1795 | struct cma_work *work; | |
1796 | struct sockaddr_in *src_in, *dst_in; | |
f0ee3404 | 1797 | union ib_gid gid; |
e51060f0 SH |
1798 | int ret; |
1799 | ||
1800 | work = kzalloc(sizeof *work, GFP_KERNEL); | |
1801 | if (!work) | |
1802 | return -ENOMEM; | |
1803 | ||
1804 | if (!id_priv->cma_dev) { | |
1805 | ret = cma_bind_loopback(id_priv); | |
1806 | if (ret) | |
1807 | goto err; | |
1808 | } | |
1809 | ||
f0ee3404 MT |
1810 | ib_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid); |
1811 | ib_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid); | |
e51060f0 SH |
1812 | |
1813 | if (cma_zero_addr(&id_priv->id.route.addr.src_addr)) { | |
1814 | src_in = (struct sockaddr_in *)&id_priv->id.route.addr.src_addr; | |
1815 | dst_in = (struct sockaddr_in *)&id_priv->id.route.addr.dst_addr; | |
1816 | src_in->sin_family = dst_in->sin_family; | |
1817 | src_in->sin_addr.s_addr = dst_in->sin_addr.s_addr; | |
1818 | } | |
1819 | ||
1820 | work->id = id_priv; | |
c4028958 | 1821 | INIT_WORK(&work->work, cma_work_handler); |
e51060f0 SH |
1822 | work->old_state = CMA_ADDR_QUERY; |
1823 | work->new_state = CMA_ADDR_RESOLVED; | |
1824 | work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED; | |
1825 | queue_work(cma_wq, &work->work); | |
1826 | return 0; | |
1827 | err: | |
1828 | kfree(work); | |
1829 | return ret; | |
1830 | } | |
1831 | ||
1832 | static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, | |
1833 | struct sockaddr *dst_addr) | |
1834 | { | |
1835 | if (src_addr && src_addr->sa_family) | |
1836 | return rdma_bind_addr(id, src_addr); | |
1837 | else | |
1838 | return cma_bind_any(id, dst_addr->sa_family); | |
1839 | } | |
1840 | ||
1841 | int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, | |
1842 | struct sockaddr *dst_addr, int timeout_ms) | |
1843 | { | |
1844 | struct rdma_id_private *id_priv; | |
1845 | int ret; | |
1846 | ||
1847 | id_priv = container_of(id, struct rdma_id_private, id); | |
1848 | if (id_priv->state == CMA_IDLE) { | |
1849 | ret = cma_bind_addr(id, src_addr, dst_addr); | |
1850 | if (ret) | |
1851 | return ret; | |
1852 | } | |
1853 | ||
1854 | if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_ADDR_QUERY)) | |
1855 | return -EINVAL; | |
1856 | ||
1857 | atomic_inc(&id_priv->refcount); | |
1858 | memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr)); | |
1859 | if (cma_any_addr(dst_addr)) | |
1860 | ret = cma_resolve_loopback(id_priv); | |
1861 | else | |
7a118df3 SH |
1862 | ret = rdma_resolve_ip(&addr_client, &id->route.addr.src_addr, |
1863 | dst_addr, &id->route.addr.dev_addr, | |
e51060f0 SH |
1864 | timeout_ms, addr_handler, id_priv); |
1865 | if (ret) | |
1866 | goto err; | |
1867 | ||
1868 | return 0; | |
1869 | err: | |
1870 | cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_BOUND); | |
1871 | cma_deref_id(id_priv); | |
1872 | return ret; | |
1873 | } | |
1874 | EXPORT_SYMBOL(rdma_resolve_addr); | |
1875 | ||
1876 | static void cma_bind_port(struct rdma_bind_list *bind_list, | |
1877 | struct rdma_id_private *id_priv) | |
1878 | { | |
1879 | struct sockaddr_in *sin; | |
1880 | ||
1881 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; | |
1882 | sin->sin_port = htons(bind_list->port); | |
1883 | id_priv->bind_list = bind_list; | |
1884 | hlist_add_head(&id_priv->node, &bind_list->owners); | |
1885 | } | |
1886 | ||
1887 | static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv, | |
1888 | unsigned short snum) | |
1889 | { | |
1890 | struct rdma_bind_list *bind_list; | |
aedec080 | 1891 | int port, ret; |
e51060f0 | 1892 | |
cb164b8c | 1893 | bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL); |
e51060f0 SH |
1894 | if (!bind_list) |
1895 | return -ENOMEM; | |
1896 | ||
aedec080 SH |
1897 | do { |
1898 | ret = idr_get_new_above(ps, bind_list, snum, &port); | |
1899 | } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL)); | |
1900 | ||
1901 | if (ret) | |
1902 | goto err1; | |
1903 | ||
1904 | if (port != snum) { | |
1905 | ret = -EADDRNOTAVAIL; | |
1906 | goto err2; | |
1907 | } | |
1908 | ||
1909 | bind_list->ps = ps; | |
1910 | bind_list->port = (unsigned short) port; | |
1911 | cma_bind_port(bind_list, id_priv); | |
1912 | return 0; | |
1913 | err2: | |
1914 | idr_remove(ps, port); | |
1915 | err1: | |
1916 | kfree(bind_list); | |
1917 | return ret; | |
1918 | } | |
e51060f0 | 1919 | |
aedec080 SH |
1920 | static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv) |
1921 | { | |
1922 | struct rdma_bind_list *bind_list; | |
227b60f5 | 1923 | int port, ret, low, high; |
aedec080 SH |
1924 | |
1925 | bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL); | |
1926 | if (!bind_list) | |
1927 | return -ENOMEM; | |
1928 | ||
1929 | retry: | |
227b60f5 | 1930 | /* FIXME: add proper port randomization per like inet_csk_get_port */ |
e51060f0 | 1931 | do { |
aedec080 | 1932 | ret = idr_get_new_above(ps, bind_list, next_port, &port); |
e51060f0 SH |
1933 | } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL)); |
1934 | ||
1935 | if (ret) | |
aedec080 | 1936 | goto err1; |
e51060f0 | 1937 | |
227b60f5 SH |
1938 | inet_get_local_port_range(&low, &high); |
1939 | if (port > high) { | |
1940 | if (next_port != low) { | |
aedec080 | 1941 | idr_remove(ps, port); |
227b60f5 | 1942 | next_port = low; |
aedec080 SH |
1943 | goto retry; |
1944 | } | |
e51060f0 | 1945 | ret = -EADDRNOTAVAIL; |
aedec080 | 1946 | goto err2; |
e51060f0 SH |
1947 | } |
1948 | ||
227b60f5 SH |
1949 | if (port == high) |
1950 | next_port = low; | |
aedec080 SH |
1951 | else |
1952 | next_port = port + 1; | |
1953 | ||
e51060f0 SH |
1954 | bind_list->ps = ps; |
1955 | bind_list->port = (unsigned short) port; | |
1956 | cma_bind_port(bind_list, id_priv); | |
1957 | return 0; | |
aedec080 SH |
1958 | err2: |
1959 | idr_remove(ps, port); | |
1960 | err1: | |
e51060f0 SH |
1961 | kfree(bind_list); |
1962 | return ret; | |
1963 | } | |
1964 | ||
1965 | static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv) | |
1966 | { | |
1967 | struct rdma_id_private *cur_id; | |
1968 | struct sockaddr_in *sin, *cur_sin; | |
1969 | struct rdma_bind_list *bind_list; | |
1970 | struct hlist_node *node; | |
1971 | unsigned short snum; | |
1972 | ||
1973 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; | |
1974 | snum = ntohs(sin->sin_port); | |
1975 | if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) | |
1976 | return -EACCES; | |
1977 | ||
1978 | bind_list = idr_find(ps, snum); | |
1979 | if (!bind_list) | |
1980 | return cma_alloc_port(ps, id_priv, snum); | |
1981 | ||
1982 | /* | |
1983 | * We don't support binding to any address if anyone is bound to | |
1984 | * a specific address on the same port. | |
1985 | */ | |
1986 | if (cma_any_addr(&id_priv->id.route.addr.src_addr)) | |
1987 | return -EADDRNOTAVAIL; | |
1988 | ||
1989 | hlist_for_each_entry(cur_id, node, &bind_list->owners, node) { | |
1990 | if (cma_any_addr(&cur_id->id.route.addr.src_addr)) | |
1991 | return -EADDRNOTAVAIL; | |
3cd96564 | 1992 | |
e51060f0 SH |
1993 | cur_sin = (struct sockaddr_in *) &cur_id->id.route.addr.src_addr; |
1994 | if (sin->sin_addr.s_addr == cur_sin->sin_addr.s_addr) | |
1995 | return -EADDRINUSE; | |
1996 | } | |
1997 | ||
1998 | cma_bind_port(bind_list, id_priv); | |
1999 | return 0; | |
2000 | } | |
2001 | ||
2002 | static int cma_get_port(struct rdma_id_private *id_priv) | |
2003 | { | |
2004 | struct idr *ps; | |
2005 | int ret; | |
2006 | ||
2007 | switch (id_priv->id.ps) { | |
2008 | case RDMA_PS_SDP: | |
2009 | ps = &sdp_ps; | |
2010 | break; | |
2011 | case RDMA_PS_TCP: | |
2012 | ps = &tcp_ps; | |
2013 | break; | |
628e5f6d SH |
2014 | case RDMA_PS_UDP: |
2015 | ps = &udp_ps; | |
2016 | break; | |
c8f6a362 SH |
2017 | case RDMA_PS_IPOIB: |
2018 | ps = &ipoib_ps; | |
2019 | break; | |
e51060f0 SH |
2020 | default: |
2021 | return -EPROTONOSUPPORT; | |
2022 | } | |
2023 | ||
2024 | mutex_lock(&lock); | |
2025 | if (cma_any_port(&id_priv->id.route.addr.src_addr)) | |
aedec080 | 2026 | ret = cma_alloc_any_port(ps, id_priv); |
e51060f0 SH |
2027 | else |
2028 | ret = cma_use_port(ps, id_priv); | |
2029 | mutex_unlock(&lock); | |
2030 | ||
2031 | return ret; | |
2032 | } | |
2033 | ||
2034 | int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr) | |
2035 | { | |
2036 | struct rdma_id_private *id_priv; | |
2037 | int ret; | |
2038 | ||
2039 | if (addr->sa_family != AF_INET) | |
2040 | return -EAFNOSUPPORT; | |
2041 | ||
2042 | id_priv = container_of(id, struct rdma_id_private, id); | |
2043 | if (!cma_comp_exch(id_priv, CMA_IDLE, CMA_ADDR_BOUND)) | |
2044 | return -EINVAL; | |
2045 | ||
2046 | if (!cma_any_addr(addr)) { | |
2047 | ret = rdma_translate_ip(addr, &id->route.addr.dev_addr); | |
e51060f0 | 2048 | if (ret) |
255d0c14 KK |
2049 | goto err1; |
2050 | ||
2051 | mutex_lock(&lock); | |
2052 | ret = cma_acquire_dev(id_priv); | |
2053 | mutex_unlock(&lock); | |
2054 | if (ret) | |
2055 | goto err1; | |
e51060f0 SH |
2056 | } |
2057 | ||
2058 | memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr)); | |
2059 | ret = cma_get_port(id_priv); | |
2060 | if (ret) | |
255d0c14 | 2061 | goto err2; |
e51060f0 SH |
2062 | |
2063 | return 0; | |
255d0c14 KK |
2064 | err2: |
2065 | if (!cma_any_addr(addr)) { | |
2066 | mutex_lock(&lock); | |
2067 | cma_detach_from_dev(id_priv); | |
2068 | mutex_unlock(&lock); | |
2069 | } | |
2070 | err1: | |
e51060f0 SH |
2071 | cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_IDLE); |
2072 | return ret; | |
2073 | } | |
2074 | EXPORT_SYMBOL(rdma_bind_addr); | |
2075 | ||
2076 | static int cma_format_hdr(void *hdr, enum rdma_port_space ps, | |
2077 | struct rdma_route *route) | |
2078 | { | |
2079 | struct sockaddr_in *src4, *dst4; | |
2080 | struct cma_hdr *cma_hdr; | |
2081 | struct sdp_hh *sdp_hdr; | |
2082 | ||
2083 | src4 = (struct sockaddr_in *) &route->addr.src_addr; | |
2084 | dst4 = (struct sockaddr_in *) &route->addr.dst_addr; | |
2085 | ||
2086 | switch (ps) { | |
2087 | case RDMA_PS_SDP: | |
2088 | sdp_hdr = hdr; | |
2089 | if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION) | |
2090 | return -EINVAL; | |
2091 | sdp_set_ip_ver(sdp_hdr, 4); | |
2092 | sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; | |
2093 | sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; | |
2094 | sdp_hdr->port = src4->sin_port; | |
2095 | break; | |
2096 | default: | |
2097 | cma_hdr = hdr; | |
2098 | cma_hdr->cma_version = CMA_VERSION; | |
2099 | cma_set_ip_ver(cma_hdr, 4); | |
2100 | cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; | |
2101 | cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; | |
2102 | cma_hdr->port = src4->sin_port; | |
2103 | break; | |
2104 | } | |
2105 | return 0; | |
2106 | } | |
2107 | ||
628e5f6d SH |
2108 | static int cma_sidr_rep_handler(struct ib_cm_id *cm_id, |
2109 | struct ib_cm_event *ib_event) | |
2110 | { | |
2111 | struct rdma_id_private *id_priv = cm_id->context; | |
2112 | struct rdma_cm_event event; | |
2113 | struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd; | |
2114 | int ret = 0; | |
2115 | ||
8aa08602 SH |
2116 | if (cma_disable_remove(id_priv, CMA_CONNECT)) |
2117 | return 0; | |
628e5f6d | 2118 | |
8aa08602 | 2119 | memset(&event, 0, sizeof event); |
628e5f6d SH |
2120 | switch (ib_event->event) { |
2121 | case IB_CM_SIDR_REQ_ERROR: | |
2122 | event.event = RDMA_CM_EVENT_UNREACHABLE; | |
2123 | event.status = -ETIMEDOUT; | |
2124 | break; | |
2125 | case IB_CM_SIDR_REP_RECEIVED: | |
2126 | event.param.ud.private_data = ib_event->private_data; | |
2127 | event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; | |
2128 | if (rep->status != IB_SIDR_SUCCESS) { | |
2129 | event.event = RDMA_CM_EVENT_UNREACHABLE; | |
2130 | event.status = ib_event->param.sidr_rep_rcvd.status; | |
2131 | break; | |
2132 | } | |
c8f6a362 | 2133 | if (id_priv->qkey != rep->qkey) { |
628e5f6d SH |
2134 | event.event = RDMA_CM_EVENT_UNREACHABLE; |
2135 | event.status = -EINVAL; | |
2136 | break; | |
2137 | } | |
2138 | ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num, | |
2139 | id_priv->id.route.path_rec, | |
2140 | &event.param.ud.ah_attr); | |
2141 | event.param.ud.qp_num = rep->qpn; | |
2142 | event.param.ud.qkey = rep->qkey; | |
2143 | event.event = RDMA_CM_EVENT_ESTABLISHED; | |
2144 | event.status = 0; | |
2145 | break; | |
2146 | default: | |
2147 | printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d", | |
2148 | ib_event->event); | |
2149 | goto out; | |
2150 | } | |
2151 | ||
2152 | ret = id_priv->id.event_handler(&id_priv->id, &event); | |
2153 | if (ret) { | |
2154 | /* Destroy the CM ID by returning a non-zero value. */ | |
2155 | id_priv->cm_id.ib = NULL; | |
2156 | cma_exch(id_priv, CMA_DESTROYING); | |
8aa08602 | 2157 | cma_enable_remove(id_priv); |
628e5f6d SH |
2158 | rdma_destroy_id(&id_priv->id); |
2159 | return ret; | |
2160 | } | |
2161 | out: | |
8aa08602 | 2162 | cma_enable_remove(id_priv); |
628e5f6d SH |
2163 | return ret; |
2164 | } | |
2165 | ||
2166 | static int cma_resolve_ib_udp(struct rdma_id_private *id_priv, | |
2167 | struct rdma_conn_param *conn_param) | |
2168 | { | |
2169 | struct ib_cm_sidr_req_param req; | |
2170 | struct rdma_route *route; | |
2171 | int ret; | |
2172 | ||
2173 | req.private_data_len = sizeof(struct cma_hdr) + | |
2174 | conn_param->private_data_len; | |
2175 | req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC); | |
2176 | if (!req.private_data) | |
2177 | return -ENOMEM; | |
2178 | ||
2179 | if (conn_param->private_data && conn_param->private_data_len) | |
2180 | memcpy((void *) req.private_data + sizeof(struct cma_hdr), | |
2181 | conn_param->private_data, conn_param->private_data_len); | |
2182 | ||
2183 | route = &id_priv->id.route; | |
2184 | ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route); | |
2185 | if (ret) | |
2186 | goto out; | |
2187 | ||
2188 | id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, | |
2189 | cma_sidr_rep_handler, id_priv); | |
2190 | if (IS_ERR(id_priv->cm_id.ib)) { | |
2191 | ret = PTR_ERR(id_priv->cm_id.ib); | |
2192 | goto out; | |
2193 | } | |
2194 | ||
2195 | req.path = route->path_rec; | |
2196 | req.service_id = cma_get_service_id(id_priv->id.ps, | |
2197 | &route->addr.dst_addr); | |
2198 | req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8); | |
2199 | req.max_cm_retries = CMA_MAX_CM_RETRIES; | |
2200 | ||
2201 | ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req); | |
2202 | if (ret) { | |
2203 | ib_destroy_cm_id(id_priv->cm_id.ib); | |
2204 | id_priv->cm_id.ib = NULL; | |
2205 | } | |
2206 | out: | |
2207 | kfree(req.private_data); | |
2208 | return ret; | |
2209 | } | |
2210 | ||
e51060f0 SH |
2211 | static int cma_connect_ib(struct rdma_id_private *id_priv, |
2212 | struct rdma_conn_param *conn_param) | |
2213 | { | |
2214 | struct ib_cm_req_param req; | |
2215 | struct rdma_route *route; | |
2216 | void *private_data; | |
2217 | int offset, ret; | |
2218 | ||
2219 | memset(&req, 0, sizeof req); | |
2220 | offset = cma_user_data_offset(id_priv->id.ps); | |
2221 | req.private_data_len = offset + conn_param->private_data_len; | |
2222 | private_data = kzalloc(req.private_data_len, GFP_ATOMIC); | |
2223 | if (!private_data) | |
2224 | return -ENOMEM; | |
2225 | ||
2226 | if (conn_param->private_data && conn_param->private_data_len) | |
2227 | memcpy(private_data + offset, conn_param->private_data, | |
2228 | conn_param->private_data_len); | |
2229 | ||
2230 | id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_ib_handler, | |
2231 | id_priv); | |
2232 | if (IS_ERR(id_priv->cm_id.ib)) { | |
2233 | ret = PTR_ERR(id_priv->cm_id.ib); | |
2234 | goto out; | |
2235 | } | |
2236 | ||
2237 | route = &id_priv->id.route; | |
2238 | ret = cma_format_hdr(private_data, id_priv->id.ps, route); | |
2239 | if (ret) | |
2240 | goto out; | |
2241 | req.private_data = private_data; | |
2242 | ||
2243 | req.primary_path = &route->path_rec[0]; | |
2244 | if (route->num_paths == 2) | |
2245 | req.alternate_path = &route->path_rec[1]; | |
2246 | ||
2247 | req.service_id = cma_get_service_id(id_priv->id.ps, | |
2248 | &route->addr.dst_addr); | |
2249 | req.qp_num = id_priv->qp_num; | |
9b2e9c0c | 2250 | req.qp_type = IB_QPT_RC; |
e51060f0 SH |
2251 | req.starting_psn = id_priv->seq_num; |
2252 | req.responder_resources = conn_param->responder_resources; | |
2253 | req.initiator_depth = conn_param->initiator_depth; | |
2254 | req.flow_control = conn_param->flow_control; | |
2255 | req.retry_count = conn_param->retry_count; | |
2256 | req.rnr_retry_count = conn_param->rnr_retry_count; | |
2257 | req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; | |
2258 | req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; | |
2259 | req.max_cm_retries = CMA_MAX_CM_RETRIES; | |
2260 | req.srq = id_priv->srq ? 1 : 0; | |
2261 | ||
2262 | ret = ib_send_cm_req(id_priv->cm_id.ib, &req); | |
2263 | out: | |
675a027c KK |
2264 | if (ret && !IS_ERR(id_priv->cm_id.ib)) { |
2265 | ib_destroy_cm_id(id_priv->cm_id.ib); | |
2266 | id_priv->cm_id.ib = NULL; | |
2267 | } | |
2268 | ||
e51060f0 SH |
2269 | kfree(private_data); |
2270 | return ret; | |
2271 | } | |
2272 | ||
07ebafba TT |
2273 | static int cma_connect_iw(struct rdma_id_private *id_priv, |
2274 | struct rdma_conn_param *conn_param) | |
2275 | { | |
2276 | struct iw_cm_id *cm_id; | |
2277 | struct sockaddr_in* sin; | |
2278 | int ret; | |
2279 | struct iw_cm_conn_param iw_param; | |
2280 | ||
2281 | cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv); | |
2282 | if (IS_ERR(cm_id)) { | |
2283 | ret = PTR_ERR(cm_id); | |
2284 | goto out; | |
2285 | } | |
2286 | ||
2287 | id_priv->cm_id.iw = cm_id; | |
2288 | ||
2289 | sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr; | |
2290 | cm_id->local_addr = *sin; | |
2291 | ||
2292 | sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr; | |
2293 | cm_id->remote_addr = *sin; | |
2294 | ||
c5483388 | 2295 | ret = cma_modify_qp_rtr(id_priv); |
675a027c KK |
2296 | if (ret) |
2297 | goto out; | |
07ebafba TT |
2298 | |
2299 | iw_param.ord = conn_param->initiator_depth; | |
2300 | iw_param.ird = conn_param->responder_resources; | |
2301 | iw_param.private_data = conn_param->private_data; | |
2302 | iw_param.private_data_len = conn_param->private_data_len; | |
2303 | if (id_priv->id.qp) | |
2304 | iw_param.qpn = id_priv->qp_num; | |
2305 | else | |
2306 | iw_param.qpn = conn_param->qp_num; | |
2307 | ret = iw_cm_connect(cm_id, &iw_param); | |
2308 | out: | |
675a027c KK |
2309 | if (ret && !IS_ERR(cm_id)) { |
2310 | iw_destroy_cm_id(cm_id); | |
2311 | id_priv->cm_id.iw = NULL; | |
2312 | } | |
07ebafba TT |
2313 | return ret; |
2314 | } | |
2315 | ||
e51060f0 SH |
2316 | int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) |
2317 | { | |
2318 | struct rdma_id_private *id_priv; | |
2319 | int ret; | |
2320 | ||
2321 | id_priv = container_of(id, struct rdma_id_private, id); | |
2322 | if (!cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_CONNECT)) | |
2323 | return -EINVAL; | |
2324 | ||
2325 | if (!id->qp) { | |
2326 | id_priv->qp_num = conn_param->qp_num; | |
e51060f0 SH |
2327 | id_priv->srq = conn_param->srq; |
2328 | } | |
2329 | ||
07ebafba TT |
2330 | switch (rdma_node_get_transport(id->device->node_type)) { |
2331 | case RDMA_TRANSPORT_IB: | |
c8f6a362 | 2332 | if (cma_is_ud_ps(id->ps)) |
628e5f6d SH |
2333 | ret = cma_resolve_ib_udp(id_priv, conn_param); |
2334 | else | |
2335 | ret = cma_connect_ib(id_priv, conn_param); | |
e51060f0 | 2336 | break; |
07ebafba TT |
2337 | case RDMA_TRANSPORT_IWARP: |
2338 | ret = cma_connect_iw(id_priv, conn_param); | |
2339 | break; | |
e51060f0 SH |
2340 | default: |
2341 | ret = -ENOSYS; | |
2342 | break; | |
2343 | } | |
2344 | if (ret) | |
2345 | goto err; | |
2346 | ||
2347 | return 0; | |
2348 | err: | |
2349 | cma_comp_exch(id_priv, CMA_CONNECT, CMA_ROUTE_RESOLVED); | |
2350 | return ret; | |
2351 | } | |
2352 | EXPORT_SYMBOL(rdma_connect); | |
2353 | ||
2354 | static int cma_accept_ib(struct rdma_id_private *id_priv, | |
2355 | struct rdma_conn_param *conn_param) | |
2356 | { | |
2357 | struct ib_cm_rep_param rep; | |
0fe313b0 SH |
2358 | struct ib_qp_attr qp_attr; |
2359 | int qp_attr_mask, ret; | |
e51060f0 | 2360 | |
0fe313b0 | 2361 | if (id_priv->id.qp) { |
c5483388 | 2362 | ret = cma_modify_qp_rtr(id_priv); |
0fe313b0 SH |
2363 | if (ret) |
2364 | goto out; | |
2365 | ||
2366 | qp_attr.qp_state = IB_QPS_RTS; | |
2367 | ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, &qp_attr, | |
2368 | &qp_attr_mask); | |
2369 | if (ret) | |
2370 | goto out; | |
2371 | ||
2372 | qp_attr.max_rd_atomic = conn_param->initiator_depth; | |
2373 | ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); | |
2374 | if (ret) | |
2375 | goto out; | |
2376 | } | |
e51060f0 SH |
2377 | |
2378 | memset(&rep, 0, sizeof rep); | |
2379 | rep.qp_num = id_priv->qp_num; | |
2380 | rep.starting_psn = id_priv->seq_num; | |
2381 | rep.private_data = conn_param->private_data; | |
2382 | rep.private_data_len = conn_param->private_data_len; | |
2383 | rep.responder_resources = conn_param->responder_resources; | |
2384 | rep.initiator_depth = conn_param->initiator_depth; | |
e51060f0 SH |
2385 | rep.failover_accepted = 0; |
2386 | rep.flow_control = conn_param->flow_control; | |
2387 | rep.rnr_retry_count = conn_param->rnr_retry_count; | |
2388 | rep.srq = id_priv->srq ? 1 : 0; | |
2389 | ||
0fe313b0 SH |
2390 | ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep); |
2391 | out: | |
2392 | return ret; | |
e51060f0 SH |
2393 | } |
2394 | ||
07ebafba TT |
2395 | static int cma_accept_iw(struct rdma_id_private *id_priv, |
2396 | struct rdma_conn_param *conn_param) | |
2397 | { | |
2398 | struct iw_cm_conn_param iw_param; | |
2399 | int ret; | |
2400 | ||
c5483388 | 2401 | ret = cma_modify_qp_rtr(id_priv); |
07ebafba TT |
2402 | if (ret) |
2403 | return ret; | |
2404 | ||
2405 | iw_param.ord = conn_param->initiator_depth; | |
2406 | iw_param.ird = conn_param->responder_resources; | |
2407 | iw_param.private_data = conn_param->private_data; | |
2408 | iw_param.private_data_len = conn_param->private_data_len; | |
2409 | if (id_priv->id.qp) { | |
2410 | iw_param.qpn = id_priv->qp_num; | |
2411 | } else | |
2412 | iw_param.qpn = conn_param->qp_num; | |
2413 | ||
2414 | return iw_cm_accept(id_priv->cm_id.iw, &iw_param); | |
2415 | } | |
2416 | ||
628e5f6d SH |
2417 | static int cma_send_sidr_rep(struct rdma_id_private *id_priv, |
2418 | enum ib_cm_sidr_status status, | |
2419 | const void *private_data, int private_data_len) | |
2420 | { | |
2421 | struct ib_cm_sidr_rep_param rep; | |
2422 | ||
2423 | memset(&rep, 0, sizeof rep); | |
2424 | rep.status = status; | |
2425 | if (status == IB_SIDR_SUCCESS) { | |
2426 | rep.qp_num = id_priv->qp_num; | |
c8f6a362 | 2427 | rep.qkey = id_priv->qkey; |
628e5f6d SH |
2428 | } |
2429 | rep.private_data = private_data; | |
2430 | rep.private_data_len = private_data_len; | |
2431 | ||
2432 | return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep); | |
2433 | } | |
2434 | ||
e51060f0 SH |
2435 | int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) |
2436 | { | |
2437 | struct rdma_id_private *id_priv; | |
2438 | int ret; | |
2439 | ||
2440 | id_priv = container_of(id, struct rdma_id_private, id); | |
2441 | if (!cma_comp(id_priv, CMA_CONNECT)) | |
2442 | return -EINVAL; | |
2443 | ||
2444 | if (!id->qp && conn_param) { | |
2445 | id_priv->qp_num = conn_param->qp_num; | |
e51060f0 SH |
2446 | id_priv->srq = conn_param->srq; |
2447 | } | |
2448 | ||
07ebafba TT |
2449 | switch (rdma_node_get_transport(id->device->node_type)) { |
2450 | case RDMA_TRANSPORT_IB: | |
c8f6a362 | 2451 | if (cma_is_ud_ps(id->ps)) |
628e5f6d SH |
2452 | ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS, |
2453 | conn_param->private_data, | |
2454 | conn_param->private_data_len); | |
2455 | else if (conn_param) | |
e51060f0 SH |
2456 | ret = cma_accept_ib(id_priv, conn_param); |
2457 | else | |
2458 | ret = cma_rep_recv(id_priv); | |
2459 | break; | |
07ebafba TT |
2460 | case RDMA_TRANSPORT_IWARP: |
2461 | ret = cma_accept_iw(id_priv, conn_param); | |
2462 | break; | |
e51060f0 SH |
2463 | default: |
2464 | ret = -ENOSYS; | |
2465 | break; | |
2466 | } | |
2467 | ||
2468 | if (ret) | |
2469 | goto reject; | |
2470 | ||
2471 | return 0; | |
2472 | reject: | |
c5483388 | 2473 | cma_modify_qp_err(id_priv); |
e51060f0 SH |
2474 | rdma_reject(id, NULL, 0); |
2475 | return ret; | |
2476 | } | |
2477 | EXPORT_SYMBOL(rdma_accept); | |
2478 | ||
0fe313b0 SH |
2479 | int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event) |
2480 | { | |
2481 | struct rdma_id_private *id_priv; | |
2482 | int ret; | |
2483 | ||
2484 | id_priv = container_of(id, struct rdma_id_private, id); | |
6c719f5c | 2485 | if (!cma_has_cm_dev(id_priv)) |
0fe313b0 SH |
2486 | return -EINVAL; |
2487 | ||
2488 | switch (id->device->node_type) { | |
2489 | case RDMA_NODE_IB_CA: | |
2490 | ret = ib_cm_notify(id_priv->cm_id.ib, event); | |
2491 | break; | |
2492 | default: | |
2493 | ret = 0; | |
2494 | break; | |
2495 | } | |
2496 | return ret; | |
2497 | } | |
2498 | EXPORT_SYMBOL(rdma_notify); | |
2499 | ||
e51060f0 SH |
2500 | int rdma_reject(struct rdma_cm_id *id, const void *private_data, |
2501 | u8 private_data_len) | |
2502 | { | |
2503 | struct rdma_id_private *id_priv; | |
2504 | int ret; | |
2505 | ||
2506 | id_priv = container_of(id, struct rdma_id_private, id); | |
6c719f5c | 2507 | if (!cma_has_cm_dev(id_priv)) |
e51060f0 SH |
2508 | return -EINVAL; |
2509 | ||
07ebafba TT |
2510 | switch (rdma_node_get_transport(id->device->node_type)) { |
2511 | case RDMA_TRANSPORT_IB: | |
c8f6a362 | 2512 | if (cma_is_ud_ps(id->ps)) |
628e5f6d SH |
2513 | ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, |
2514 | private_data, private_data_len); | |
2515 | else | |
2516 | ret = ib_send_cm_rej(id_priv->cm_id.ib, | |
2517 | IB_CM_REJ_CONSUMER_DEFINED, NULL, | |
2518 | 0, private_data, private_data_len); | |
e51060f0 | 2519 | break; |
07ebafba TT |
2520 | case RDMA_TRANSPORT_IWARP: |
2521 | ret = iw_cm_reject(id_priv->cm_id.iw, | |
2522 | private_data, private_data_len); | |
2523 | break; | |
e51060f0 SH |
2524 | default: |
2525 | ret = -ENOSYS; | |
2526 | break; | |
2527 | } | |
2528 | return ret; | |
2529 | } | |
2530 | EXPORT_SYMBOL(rdma_reject); | |
2531 | ||
2532 | int rdma_disconnect(struct rdma_cm_id *id) | |
2533 | { | |
2534 | struct rdma_id_private *id_priv; | |
2535 | int ret; | |
2536 | ||
2537 | id_priv = container_of(id, struct rdma_id_private, id); | |
6c719f5c | 2538 | if (!cma_has_cm_dev(id_priv)) |
e51060f0 SH |
2539 | return -EINVAL; |
2540 | ||
07ebafba TT |
2541 | switch (rdma_node_get_transport(id->device->node_type)) { |
2542 | case RDMA_TRANSPORT_IB: | |
c5483388 | 2543 | ret = cma_modify_qp_err(id_priv); |
07ebafba TT |
2544 | if (ret) |
2545 | goto out; | |
e51060f0 SH |
2546 | /* Initiate or respond to a disconnect. */ |
2547 | if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0)) | |
2548 | ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0); | |
2549 | break; | |
07ebafba TT |
2550 | case RDMA_TRANSPORT_IWARP: |
2551 | ret = iw_cm_disconnect(id_priv->cm_id.iw, 0); | |
2552 | break; | |
e51060f0 | 2553 | default: |
07ebafba | 2554 | ret = -EINVAL; |
e51060f0 SH |
2555 | break; |
2556 | } | |
2557 | out: | |
2558 | return ret; | |
2559 | } | |
2560 | EXPORT_SYMBOL(rdma_disconnect); | |
2561 | ||
c8f6a362 SH |
2562 | static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast) |
2563 | { | |
2564 | struct rdma_id_private *id_priv; | |
2565 | struct cma_multicast *mc = multicast->context; | |
2566 | struct rdma_cm_event event; | |
2567 | int ret; | |
2568 | ||
2569 | id_priv = mc->id_priv; | |
8aa08602 SH |
2570 | if (cma_disable_remove(id_priv, CMA_ADDR_BOUND) && |
2571 | cma_disable_remove(id_priv, CMA_ADDR_RESOLVED)) | |
2572 | return 0; | |
c8f6a362 | 2573 | |
c5483388 | 2574 | mutex_lock(&id_priv->qp_mutex); |
c8f6a362 SH |
2575 | if (!status && id_priv->id.qp) |
2576 | status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid, | |
2577 | multicast->rec.mlid); | |
c5483388 | 2578 | mutex_unlock(&id_priv->qp_mutex); |
c8f6a362 SH |
2579 | |
2580 | memset(&event, 0, sizeof event); | |
2581 | event.status = status; | |
2582 | event.param.ud.private_data = mc->context; | |
2583 | if (!status) { | |
2584 | event.event = RDMA_CM_EVENT_MULTICAST_JOIN; | |
2585 | ib_init_ah_from_mcmember(id_priv->id.device, | |
2586 | id_priv->id.port_num, &multicast->rec, | |
2587 | &event.param.ud.ah_attr); | |
2588 | event.param.ud.qp_num = 0xFFFFFF; | |
2589 | event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey); | |
2590 | } else | |
2591 | event.event = RDMA_CM_EVENT_MULTICAST_ERROR; | |
2592 | ||
2593 | ret = id_priv->id.event_handler(&id_priv->id, &event); | |
2594 | if (ret) { | |
2595 | cma_exch(id_priv, CMA_DESTROYING); | |
8aa08602 | 2596 | cma_enable_remove(id_priv); |
c8f6a362 SH |
2597 | rdma_destroy_id(&id_priv->id); |
2598 | return 0; | |
2599 | } | |
8aa08602 SH |
2600 | |
2601 | cma_enable_remove(id_priv); | |
c8f6a362 SH |
2602 | return 0; |
2603 | } | |
2604 | ||
2605 | static void cma_set_mgid(struct rdma_id_private *id_priv, | |
2606 | struct sockaddr *addr, union ib_gid *mgid) | |
2607 | { | |
2608 | unsigned char mc_map[MAX_ADDR_LEN]; | |
2609 | struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; | |
2610 | struct sockaddr_in *sin = (struct sockaddr_in *) addr; | |
2611 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr; | |
2612 | ||
2613 | if (cma_any_addr(addr)) { | |
2614 | memset(mgid, 0, sizeof *mgid); | |
2615 | } else if ((addr->sa_family == AF_INET6) && | |
2616 | ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFF10A01B) == | |
2617 | 0xFF10A01B)) { | |
2618 | /* IPv6 address is an SA assigned MGID. */ | |
2619 | memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); | |
2620 | } else { | |
2621 | ip_ib_mc_map(sin->sin_addr.s_addr, mc_map); | |
2622 | if (id_priv->id.ps == RDMA_PS_UDP) | |
2623 | mc_map[7] = 0x01; /* Use RDMA CM signature */ | |
2624 | mc_map[8] = ib_addr_get_pkey(dev_addr) >> 8; | |
2625 | mc_map[9] = (unsigned char) ib_addr_get_pkey(dev_addr); | |
2626 | *mgid = *(union ib_gid *) (mc_map + 4); | |
2627 | } | |
2628 | } | |
2629 | ||
2630 | static int cma_join_ib_multicast(struct rdma_id_private *id_priv, | |
2631 | struct cma_multicast *mc) | |
2632 | { | |
2633 | struct ib_sa_mcmember_rec rec; | |
2634 | struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; | |
2635 | ib_sa_comp_mask comp_mask; | |
2636 | int ret; | |
2637 | ||
2638 | ib_addr_get_mgid(dev_addr, &rec.mgid); | |
2639 | ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num, | |
2640 | &rec.mgid, &rec); | |
2641 | if (ret) | |
2642 | return ret; | |
2643 | ||
2644 | cma_set_mgid(id_priv, &mc->addr, &rec.mgid); | |
2645 | if (id_priv->id.ps == RDMA_PS_UDP) | |
2646 | rec.qkey = cpu_to_be32(RDMA_UDP_QKEY); | |
2647 | ib_addr_get_sgid(dev_addr, &rec.port_gid); | |
2648 | rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); | |
2649 | rec.join_state = 1; | |
2650 | ||
2651 | comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID | | |
2652 | IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE | | |
2653 | IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL | | |
2654 | IB_SA_MCMEMBER_REC_FLOW_LABEL | | |
2655 | IB_SA_MCMEMBER_REC_TRAFFIC_CLASS; | |
2656 | ||
2657 | mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device, | |
2658 | id_priv->id.port_num, &rec, | |
2659 | comp_mask, GFP_KERNEL, | |
2660 | cma_ib_mc_handler, mc); | |
2661 | if (IS_ERR(mc->multicast.ib)) | |
2662 | return PTR_ERR(mc->multicast.ib); | |
2663 | ||
2664 | return 0; | |
2665 | } | |
2666 | ||
2667 | int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr, | |
2668 | void *context) | |
2669 | { | |
2670 | struct rdma_id_private *id_priv; | |
2671 | struct cma_multicast *mc; | |
2672 | int ret; | |
2673 | ||
2674 | id_priv = container_of(id, struct rdma_id_private, id); | |
2675 | if (!cma_comp(id_priv, CMA_ADDR_BOUND) && | |
2676 | !cma_comp(id_priv, CMA_ADDR_RESOLVED)) | |
2677 | return -EINVAL; | |
2678 | ||
2679 | mc = kmalloc(sizeof *mc, GFP_KERNEL); | |
2680 | if (!mc) | |
2681 | return -ENOMEM; | |
2682 | ||
2683 | memcpy(&mc->addr, addr, ip_addr_size(addr)); | |
2684 | mc->context = context; | |
2685 | mc->id_priv = id_priv; | |
2686 | ||
2687 | spin_lock(&id_priv->lock); | |
2688 | list_add(&mc->list, &id_priv->mc_list); | |
2689 | spin_unlock(&id_priv->lock); | |
2690 | ||
2691 | switch (rdma_node_get_transport(id->device->node_type)) { | |
2692 | case RDMA_TRANSPORT_IB: | |
2693 | ret = cma_join_ib_multicast(id_priv, mc); | |
2694 | break; | |
2695 | default: | |
2696 | ret = -ENOSYS; | |
2697 | break; | |
2698 | } | |
2699 | ||
2700 | if (ret) { | |
2701 | spin_lock_irq(&id_priv->lock); | |
2702 | list_del(&mc->list); | |
2703 | spin_unlock_irq(&id_priv->lock); | |
2704 | kfree(mc); | |
2705 | } | |
2706 | return ret; | |
2707 | } | |
2708 | EXPORT_SYMBOL(rdma_join_multicast); | |
2709 | ||
2710 | void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr) | |
2711 | { | |
2712 | struct rdma_id_private *id_priv; | |
2713 | struct cma_multicast *mc; | |
2714 | ||
2715 | id_priv = container_of(id, struct rdma_id_private, id); | |
2716 | spin_lock_irq(&id_priv->lock); | |
2717 | list_for_each_entry(mc, &id_priv->mc_list, list) { | |
2718 | if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) { | |
2719 | list_del(&mc->list); | |
2720 | spin_unlock_irq(&id_priv->lock); | |
2721 | ||
2722 | if (id->qp) | |
2723 | ib_detach_mcast(id->qp, | |
2724 | &mc->multicast.ib->rec.mgid, | |
2725 | mc->multicast.ib->rec.mlid); | |
2726 | ib_sa_free_multicast(mc->multicast.ib); | |
2727 | kfree(mc); | |
2728 | return; | |
2729 | } | |
2730 | } | |
2731 | spin_unlock_irq(&id_priv->lock); | |
2732 | } | |
2733 | EXPORT_SYMBOL(rdma_leave_multicast); | |
2734 | ||
e51060f0 SH |
2735 | static void cma_add_one(struct ib_device *device) |
2736 | { | |
2737 | struct cma_device *cma_dev; | |
2738 | struct rdma_id_private *id_priv; | |
2739 | ||
2740 | cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL); | |
2741 | if (!cma_dev) | |
2742 | return; | |
2743 | ||
2744 | cma_dev->device = device; | |
e51060f0 SH |
2745 | |
2746 | init_completion(&cma_dev->comp); | |
2747 | atomic_set(&cma_dev->refcount, 1); | |
2748 | INIT_LIST_HEAD(&cma_dev->id_list); | |
2749 | ib_set_client_data(device, &cma_client, cma_dev); | |
2750 | ||
2751 | mutex_lock(&lock); | |
2752 | list_add_tail(&cma_dev->list, &dev_list); | |
2753 | list_for_each_entry(id_priv, &listen_any_list, list) | |
2754 | cma_listen_on_dev(id_priv, cma_dev); | |
2755 | mutex_unlock(&lock); | |
e51060f0 SH |
2756 | } |
2757 | ||
2758 | static int cma_remove_id_dev(struct rdma_id_private *id_priv) | |
2759 | { | |
a1b1b61f | 2760 | struct rdma_cm_event event; |
e51060f0 SH |
2761 | enum cma_state state; |
2762 | ||
2763 | /* Record that we want to remove the device */ | |
2764 | state = cma_exch(id_priv, CMA_DEVICE_REMOVAL); | |
2765 | if (state == CMA_DESTROYING) | |
2766 | return 0; | |
2767 | ||
2768 | cma_cancel_operation(id_priv, state); | |
2769 | wait_event(id_priv->wait_remove, !atomic_read(&id_priv->dev_remove)); | |
2770 | ||
2771 | /* Check for destruction from another callback. */ | |
2772 | if (!cma_comp(id_priv, CMA_DEVICE_REMOVAL)) | |
2773 | return 0; | |
2774 | ||
a1b1b61f SH |
2775 | memset(&event, 0, sizeof event); |
2776 | event.event = RDMA_CM_EVENT_DEVICE_REMOVAL; | |
2777 | return id_priv->id.event_handler(&id_priv->id, &event); | |
e51060f0 SH |
2778 | } |
2779 | ||
2780 | static void cma_process_remove(struct cma_device *cma_dev) | |
2781 | { | |
e51060f0 SH |
2782 | struct rdma_id_private *id_priv; |
2783 | int ret; | |
2784 | ||
e51060f0 SH |
2785 | mutex_lock(&lock); |
2786 | while (!list_empty(&cma_dev->id_list)) { | |
2787 | id_priv = list_entry(cma_dev->id_list.next, | |
2788 | struct rdma_id_private, list); | |
2789 | ||
2790 | if (cma_internal_listen(id_priv)) { | |
2791 | cma_destroy_listen(id_priv); | |
2792 | continue; | |
2793 | } | |
2794 | ||
94de178a | 2795 | list_del_init(&id_priv->list); |
e51060f0 SH |
2796 | atomic_inc(&id_priv->refcount); |
2797 | mutex_unlock(&lock); | |
2798 | ||
2799 | ret = cma_remove_id_dev(id_priv); | |
2800 | cma_deref_id(id_priv); | |
2801 | if (ret) | |
2802 | rdma_destroy_id(&id_priv->id); | |
2803 | ||
2804 | mutex_lock(&lock); | |
2805 | } | |
2806 | mutex_unlock(&lock); | |
2807 | ||
2808 | cma_deref_dev(cma_dev); | |
2809 | wait_for_completion(&cma_dev->comp); | |
2810 | } | |
2811 | ||
2812 | static void cma_remove_one(struct ib_device *device) | |
2813 | { | |
2814 | struct cma_device *cma_dev; | |
2815 | ||
2816 | cma_dev = ib_get_client_data(device, &cma_client); | |
2817 | if (!cma_dev) | |
2818 | return; | |
2819 | ||
2820 | mutex_lock(&lock); | |
2821 | list_del(&cma_dev->list); | |
2822 | mutex_unlock(&lock); | |
2823 | ||
2824 | cma_process_remove(cma_dev); | |
2825 | kfree(cma_dev); | |
2826 | } | |
2827 | ||
2828 | static int cma_init(void) | |
2829 | { | |
227b60f5 | 2830 | int ret, low, high; |
e51060f0 | 2831 | |
aedec080 | 2832 | get_random_bytes(&next_port, sizeof next_port); |
227b60f5 SH |
2833 | inet_get_local_port_range(&low, &high); |
2834 | next_port = ((unsigned int) next_port % (high - low)) + low; | |
2835 | ||
c7f743a6 | 2836 | cma_wq = create_singlethread_workqueue("rdma_cm"); |
e51060f0 SH |
2837 | if (!cma_wq) |
2838 | return -ENOMEM; | |
2839 | ||
c1a0b23b | 2840 | ib_sa_register_client(&sa_client); |
7a118df3 | 2841 | rdma_addr_register_client(&addr_client); |
c1a0b23b | 2842 | |
e51060f0 SH |
2843 | ret = ib_register_client(&cma_client); |
2844 | if (ret) | |
2845 | goto err; | |
2846 | return 0; | |
2847 | ||
2848 | err: | |
7a118df3 | 2849 | rdma_addr_unregister_client(&addr_client); |
c1a0b23b | 2850 | ib_sa_unregister_client(&sa_client); |
e51060f0 SH |
2851 | destroy_workqueue(cma_wq); |
2852 | return ret; | |
2853 | } | |
2854 | ||
2855 | static void cma_cleanup(void) | |
2856 | { | |
2857 | ib_unregister_client(&cma_client); | |
7a118df3 | 2858 | rdma_addr_unregister_client(&addr_client); |
c1a0b23b | 2859 | ib_sa_unregister_client(&sa_client); |
e51060f0 SH |
2860 | destroy_workqueue(cma_wq); |
2861 | idr_destroy(&sdp_ps); | |
2862 | idr_destroy(&tcp_ps); | |
628e5f6d | 2863 | idr_destroy(&udp_ps); |
c8f6a362 | 2864 | idr_destroy(&ipoib_ps); |
e51060f0 SH |
2865 | } |
2866 | ||
2867 | module_init(cma_init); | |
2868 | module_exit(cma_cleanup); |