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e51060f0 SH |
1 | /* |
2 | * Copyright (c) 2005 Voltaire Inc. All rights reserved. | |
3 | * Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved. | |
4 | * Copyright (c) 1999-2005, Mellanox Technologies, Inc. All rights reserved. | |
5 | * Copyright (c) 2005-2006 Intel Corporation. All rights reserved. | |
6 | * | |
a9474917 SH |
7 | * This software is available to you under a choice of one of two |
8 | * licenses. You may choose to be licensed under the terms of the GNU | |
9 | * General Public License (GPL) Version 2, available from the file | |
10 | * COPYING in the main directory of this source tree, or the | |
11 | * OpenIB.org BSD license below: | |
e51060f0 | 12 | * |
a9474917 SH |
13 | * Redistribution and use in source and binary forms, with or |
14 | * without modification, are permitted provided that the following | |
15 | * conditions are met: | |
e51060f0 | 16 | * |
a9474917 SH |
17 | * - Redistributions of source code must retain the above |
18 | * copyright notice, this list of conditions and the following | |
19 | * disclaimer. | |
e51060f0 | 20 | * |
a9474917 SH |
21 | * - Redistributions in binary form must reproduce the above |
22 | * copyright notice, this list of conditions and the following | |
23 | * disclaimer in the documentation and/or other materials | |
24 | * provided with the distribution. | |
e51060f0 | 25 | * |
a9474917 SH |
26 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
27 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
28 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
29 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
30 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
31 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
32 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
33 | * SOFTWARE. | |
e51060f0 SH |
34 | */ |
35 | ||
36 | #include <linux/completion.h> | |
37 | #include <linux/in.h> | |
38 | #include <linux/in6.h> | |
39 | #include <linux/mutex.h> | |
40 | #include <linux/random.h> | |
41 | #include <linux/idr.h> | |
07ebafba | 42 | #include <linux/inetdevice.h> |
e51060f0 SH |
43 | |
44 | #include <net/tcp.h> | |
45 | ||
46 | #include <rdma/rdma_cm.h> | |
47 | #include <rdma/rdma_cm_ib.h> | |
48 | #include <rdma/ib_cache.h> | |
49 | #include <rdma/ib_cm.h> | |
50 | #include <rdma/ib_sa.h> | |
07ebafba | 51 | #include <rdma/iw_cm.h> |
e51060f0 SH |
52 | |
53 | MODULE_AUTHOR("Sean Hefty"); | |
54 | MODULE_DESCRIPTION("Generic RDMA CM Agent"); | |
55 | MODULE_LICENSE("Dual BSD/GPL"); | |
56 | ||
57 | #define CMA_CM_RESPONSE_TIMEOUT 20 | |
d5bb7599 | 58 | #define CMA_MAX_CM_RETRIES 15 |
dcb3f974 | 59 | #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24) |
e51060f0 SH |
60 | |
61 | static void cma_add_one(struct ib_device *device); | |
62 | static void cma_remove_one(struct ib_device *device); | |
63 | ||
64 | static struct ib_client cma_client = { | |
65 | .name = "cma", | |
66 | .add = cma_add_one, | |
67 | .remove = cma_remove_one | |
68 | }; | |
69 | ||
c1a0b23b | 70 | static struct ib_sa_client sa_client; |
7a118df3 | 71 | static struct rdma_addr_client addr_client; |
e51060f0 SH |
72 | static LIST_HEAD(dev_list); |
73 | static LIST_HEAD(listen_any_list); | |
74 | static DEFINE_MUTEX(lock); | |
75 | static struct workqueue_struct *cma_wq; | |
76 | static DEFINE_IDR(sdp_ps); | |
77 | static DEFINE_IDR(tcp_ps); | |
628e5f6d | 78 | static DEFINE_IDR(udp_ps); |
c8f6a362 | 79 | static DEFINE_IDR(ipoib_ps); |
aedec080 | 80 | static int next_port; |
e51060f0 SH |
81 | |
82 | struct cma_device { | |
83 | struct list_head list; | |
84 | struct ib_device *device; | |
e51060f0 SH |
85 | struct completion comp; |
86 | atomic_t refcount; | |
87 | struct list_head id_list; | |
88 | }; | |
89 | ||
90 | enum cma_state { | |
91 | CMA_IDLE, | |
92 | CMA_ADDR_QUERY, | |
93 | CMA_ADDR_RESOLVED, | |
94 | CMA_ROUTE_QUERY, | |
95 | CMA_ROUTE_RESOLVED, | |
96 | CMA_CONNECT, | |
97 | CMA_DISCONNECT, | |
98 | CMA_ADDR_BOUND, | |
99 | CMA_LISTEN, | |
100 | CMA_DEVICE_REMOVAL, | |
101 | CMA_DESTROYING | |
102 | }; | |
103 | ||
104 | struct rdma_bind_list { | |
105 | struct idr *ps; | |
106 | struct hlist_head owners; | |
107 | unsigned short port; | |
108 | }; | |
109 | ||
110 | /* | |
111 | * Device removal can occur at anytime, so we need extra handling to | |
112 | * serialize notifying the user of device removal with other callbacks. | |
113 | * We do this by disabling removal notification while a callback is in process, | |
114 | * and reporting it after the callback completes. | |
115 | */ | |
116 | struct rdma_id_private { | |
117 | struct rdma_cm_id id; | |
118 | ||
119 | struct rdma_bind_list *bind_list; | |
120 | struct hlist_node node; | |
d02d1f53 SH |
121 | struct list_head list; /* listen_any_list or cma_device.list */ |
122 | struct list_head listen_list; /* per device listens */ | |
e51060f0 | 123 | struct cma_device *cma_dev; |
c8f6a362 | 124 | struct list_head mc_list; |
e51060f0 | 125 | |
d02d1f53 | 126 | int internal_id; |
e51060f0 SH |
127 | enum cma_state state; |
128 | spinlock_t lock; | |
c5483388 SH |
129 | struct mutex qp_mutex; |
130 | ||
e51060f0 SH |
131 | struct completion comp; |
132 | atomic_t refcount; | |
de910bd9 | 133 | struct mutex handler_mutex; |
e51060f0 SH |
134 | |
135 | int backlog; | |
136 | int timeout_ms; | |
137 | struct ib_sa_query *query; | |
138 | int query_id; | |
139 | union { | |
140 | struct ib_cm_id *ib; | |
07ebafba | 141 | struct iw_cm_id *iw; |
e51060f0 SH |
142 | } cm_id; |
143 | ||
144 | u32 seq_num; | |
c8f6a362 | 145 | u32 qkey; |
e51060f0 | 146 | u32 qp_num; |
e51060f0 | 147 | u8 srq; |
a81c994d | 148 | u8 tos; |
e51060f0 SH |
149 | }; |
150 | ||
c8f6a362 SH |
151 | struct cma_multicast { |
152 | struct rdma_id_private *id_priv; | |
153 | union { | |
154 | struct ib_sa_multicast *ib; | |
155 | } multicast; | |
156 | struct list_head list; | |
157 | void *context; | |
158 | struct sockaddr addr; | |
159 | u8 pad[sizeof(struct sockaddr_in6) - | |
160 | sizeof(struct sockaddr)]; | |
161 | }; | |
162 | ||
e51060f0 SH |
163 | struct cma_work { |
164 | struct work_struct work; | |
165 | struct rdma_id_private *id; | |
166 | enum cma_state old_state; | |
167 | enum cma_state new_state; | |
168 | struct rdma_cm_event event; | |
169 | }; | |
170 | ||
171 | union cma_ip_addr { | |
172 | struct in6_addr ip6; | |
173 | struct { | |
1b90c137 AV |
174 | __be32 pad[3]; |
175 | __be32 addr; | |
e51060f0 SH |
176 | } ip4; |
177 | }; | |
178 | ||
179 | struct cma_hdr { | |
180 | u8 cma_version; | |
181 | u8 ip_version; /* IP version: 7:4 */ | |
1b90c137 | 182 | __be16 port; |
e51060f0 SH |
183 | union cma_ip_addr src_addr; |
184 | union cma_ip_addr dst_addr; | |
185 | }; | |
186 | ||
187 | struct sdp_hh { | |
188 | u8 bsdh[16]; | |
189 | u8 sdp_version; /* Major version: 7:4 */ | |
190 | u8 ip_version; /* IP version: 7:4 */ | |
191 | u8 sdp_specific1[10]; | |
1b90c137 AV |
192 | __be16 port; |
193 | __be16 sdp_specific2; | |
e51060f0 SH |
194 | union cma_ip_addr src_addr; |
195 | union cma_ip_addr dst_addr; | |
196 | }; | |
197 | ||
198 | struct sdp_hah { | |
199 | u8 bsdh[16]; | |
200 | u8 sdp_version; | |
201 | }; | |
202 | ||
203 | #define CMA_VERSION 0x00 | |
204 | #define SDP_MAJ_VERSION 0x2 | |
205 | ||
206 | static int cma_comp(struct rdma_id_private *id_priv, enum cma_state comp) | |
207 | { | |
208 | unsigned long flags; | |
209 | int ret; | |
210 | ||
211 | spin_lock_irqsave(&id_priv->lock, flags); | |
212 | ret = (id_priv->state == comp); | |
213 | spin_unlock_irqrestore(&id_priv->lock, flags); | |
214 | return ret; | |
215 | } | |
216 | ||
217 | static int cma_comp_exch(struct rdma_id_private *id_priv, | |
218 | enum cma_state comp, enum cma_state exch) | |
219 | { | |
220 | unsigned long flags; | |
221 | int ret; | |
222 | ||
223 | spin_lock_irqsave(&id_priv->lock, flags); | |
224 | if ((ret = (id_priv->state == comp))) | |
225 | id_priv->state = exch; | |
226 | spin_unlock_irqrestore(&id_priv->lock, flags); | |
227 | return ret; | |
228 | } | |
229 | ||
230 | static enum cma_state cma_exch(struct rdma_id_private *id_priv, | |
231 | enum cma_state exch) | |
232 | { | |
233 | unsigned long flags; | |
234 | enum cma_state old; | |
235 | ||
236 | spin_lock_irqsave(&id_priv->lock, flags); | |
237 | old = id_priv->state; | |
238 | id_priv->state = exch; | |
239 | spin_unlock_irqrestore(&id_priv->lock, flags); | |
240 | return old; | |
241 | } | |
242 | ||
243 | static inline u8 cma_get_ip_ver(struct cma_hdr *hdr) | |
244 | { | |
245 | return hdr->ip_version >> 4; | |
246 | } | |
247 | ||
248 | static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver) | |
249 | { | |
250 | hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF); | |
251 | } | |
252 | ||
253 | static inline u8 sdp_get_majv(u8 sdp_version) | |
254 | { | |
255 | return sdp_version >> 4; | |
256 | } | |
257 | ||
258 | static inline u8 sdp_get_ip_ver(struct sdp_hh *hh) | |
259 | { | |
260 | return hh->ip_version >> 4; | |
261 | } | |
262 | ||
263 | static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver) | |
264 | { | |
265 | hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF); | |
266 | } | |
267 | ||
c8f6a362 SH |
268 | static inline int cma_is_ud_ps(enum rdma_port_space ps) |
269 | { | |
270 | return (ps == RDMA_PS_UDP || ps == RDMA_PS_IPOIB); | |
271 | } | |
272 | ||
e51060f0 SH |
273 | static void cma_attach_to_dev(struct rdma_id_private *id_priv, |
274 | struct cma_device *cma_dev) | |
275 | { | |
276 | atomic_inc(&cma_dev->refcount); | |
277 | id_priv->cma_dev = cma_dev; | |
278 | id_priv->id.device = cma_dev->device; | |
279 | list_add_tail(&id_priv->list, &cma_dev->id_list); | |
280 | } | |
281 | ||
282 | static inline void cma_deref_dev(struct cma_device *cma_dev) | |
283 | { | |
284 | if (atomic_dec_and_test(&cma_dev->refcount)) | |
285 | complete(&cma_dev->comp); | |
286 | } | |
287 | ||
288 | static void cma_detach_from_dev(struct rdma_id_private *id_priv) | |
289 | { | |
290 | list_del(&id_priv->list); | |
291 | cma_deref_dev(id_priv->cma_dev); | |
292 | id_priv->cma_dev = NULL; | |
293 | } | |
294 | ||
c8f6a362 SH |
295 | static int cma_set_qkey(struct ib_device *device, u8 port_num, |
296 | enum rdma_port_space ps, | |
297 | struct rdma_dev_addr *dev_addr, u32 *qkey) | |
298 | { | |
299 | struct ib_sa_mcmember_rec rec; | |
300 | int ret = 0; | |
301 | ||
302 | switch (ps) { | |
303 | case RDMA_PS_UDP: | |
304 | *qkey = RDMA_UDP_QKEY; | |
305 | break; | |
306 | case RDMA_PS_IPOIB: | |
307 | ib_addr_get_mgid(dev_addr, &rec.mgid); | |
308 | ret = ib_sa_get_mcmember_rec(device, port_num, &rec.mgid, &rec); | |
309 | *qkey = be32_to_cpu(rec.qkey); | |
310 | break; | |
311 | default: | |
312 | break; | |
313 | } | |
314 | return ret; | |
315 | } | |
316 | ||
07ebafba | 317 | static int cma_acquire_dev(struct rdma_id_private *id_priv) |
e51060f0 | 318 | { |
c8f6a362 | 319 | struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; |
e51060f0 | 320 | struct cma_device *cma_dev; |
f0ee3404 | 321 | union ib_gid gid; |
e51060f0 SH |
322 | int ret = -ENODEV; |
323 | ||
c8f6a362 | 324 | switch (rdma_node_get_transport(dev_addr->dev_type)) { |
07ebafba | 325 | case RDMA_TRANSPORT_IB: |
c8f6a362 | 326 | ib_addr_get_sgid(dev_addr, &gid); |
07ebafba TT |
327 | break; |
328 | case RDMA_TRANSPORT_IWARP: | |
c8f6a362 | 329 | iw_addr_get_sgid(dev_addr, &gid); |
07ebafba TT |
330 | break; |
331 | default: | |
332 | return -ENODEV; | |
333 | } | |
61a73c70 | 334 | |
e51060f0 | 335 | list_for_each_entry(cma_dev, &dev_list, list) { |
f0ee3404 | 336 | ret = ib_find_cached_gid(cma_dev->device, &gid, |
e51060f0 SH |
337 | &id_priv->id.port_num, NULL); |
338 | if (!ret) { | |
c8f6a362 SH |
339 | ret = cma_set_qkey(cma_dev->device, |
340 | id_priv->id.port_num, | |
341 | id_priv->id.ps, dev_addr, | |
342 | &id_priv->qkey); | |
343 | if (!ret) | |
344 | cma_attach_to_dev(id_priv, cma_dev); | |
e51060f0 SH |
345 | break; |
346 | } | |
347 | } | |
e51060f0 SH |
348 | return ret; |
349 | } | |
350 | ||
e51060f0 SH |
351 | static void cma_deref_id(struct rdma_id_private *id_priv) |
352 | { | |
353 | if (atomic_dec_and_test(&id_priv->refcount)) | |
354 | complete(&id_priv->comp); | |
355 | } | |
356 | ||
de910bd9 | 357 | static int cma_disable_callback(struct rdma_id_private *id_priv, |
8aa08602 SH |
358 | enum cma_state state) |
359 | { | |
de910bd9 OG |
360 | mutex_lock(&id_priv->handler_mutex); |
361 | if (id_priv->state != state) { | |
362 | mutex_unlock(&id_priv->handler_mutex); | |
363 | return -EINVAL; | |
364 | } | |
365 | return 0; | |
e51060f0 SH |
366 | } |
367 | ||
6c719f5c SH |
368 | static int cma_has_cm_dev(struct rdma_id_private *id_priv) |
369 | { | |
370 | return (id_priv->id.device && id_priv->cm_id.ib); | |
371 | } | |
372 | ||
e51060f0 SH |
373 | struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler, |
374 | void *context, enum rdma_port_space ps) | |
375 | { | |
376 | struct rdma_id_private *id_priv; | |
377 | ||
378 | id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL); | |
379 | if (!id_priv) | |
380 | return ERR_PTR(-ENOMEM); | |
381 | ||
382 | id_priv->state = CMA_IDLE; | |
383 | id_priv->id.context = context; | |
384 | id_priv->id.event_handler = event_handler; | |
385 | id_priv->id.ps = ps; | |
386 | spin_lock_init(&id_priv->lock); | |
c5483388 | 387 | mutex_init(&id_priv->qp_mutex); |
e51060f0 SH |
388 | init_completion(&id_priv->comp); |
389 | atomic_set(&id_priv->refcount, 1); | |
de910bd9 | 390 | mutex_init(&id_priv->handler_mutex); |
e51060f0 | 391 | INIT_LIST_HEAD(&id_priv->listen_list); |
c8f6a362 | 392 | INIT_LIST_HEAD(&id_priv->mc_list); |
e51060f0 SH |
393 | get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num); |
394 | ||
395 | return &id_priv->id; | |
396 | } | |
397 | EXPORT_SYMBOL(rdma_create_id); | |
398 | ||
c8f6a362 | 399 | static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) |
e51060f0 SH |
400 | { |
401 | struct ib_qp_attr qp_attr; | |
c8f6a362 | 402 | int qp_attr_mask, ret; |
e51060f0 | 403 | |
c8f6a362 SH |
404 | qp_attr.qp_state = IB_QPS_INIT; |
405 | ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); | |
e51060f0 SH |
406 | if (ret) |
407 | return ret; | |
408 | ||
c8f6a362 SH |
409 | ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); |
410 | if (ret) | |
411 | return ret; | |
412 | ||
413 | qp_attr.qp_state = IB_QPS_RTR; | |
414 | ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE); | |
415 | if (ret) | |
416 | return ret; | |
417 | ||
418 | qp_attr.qp_state = IB_QPS_RTS; | |
419 | qp_attr.sq_psn = 0; | |
420 | ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN); | |
421 | ||
422 | return ret; | |
e51060f0 SH |
423 | } |
424 | ||
c8f6a362 | 425 | static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) |
07ebafba TT |
426 | { |
427 | struct ib_qp_attr qp_attr; | |
c8f6a362 | 428 | int qp_attr_mask, ret; |
07ebafba TT |
429 | |
430 | qp_attr.qp_state = IB_QPS_INIT; | |
c8f6a362 SH |
431 | ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); |
432 | if (ret) | |
433 | return ret; | |
07ebafba | 434 | |
c8f6a362 | 435 | return ib_modify_qp(qp, &qp_attr, qp_attr_mask); |
07ebafba TT |
436 | } |
437 | ||
e51060f0 SH |
438 | int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd, |
439 | struct ib_qp_init_attr *qp_init_attr) | |
440 | { | |
441 | struct rdma_id_private *id_priv; | |
442 | struct ib_qp *qp; | |
443 | int ret; | |
444 | ||
445 | id_priv = container_of(id, struct rdma_id_private, id); | |
446 | if (id->device != pd->device) | |
447 | return -EINVAL; | |
448 | ||
449 | qp = ib_create_qp(pd, qp_init_attr); | |
450 | if (IS_ERR(qp)) | |
451 | return PTR_ERR(qp); | |
452 | ||
c8f6a362 SH |
453 | if (cma_is_ud_ps(id_priv->id.ps)) |
454 | ret = cma_init_ud_qp(id_priv, qp); | |
455 | else | |
456 | ret = cma_init_conn_qp(id_priv, qp); | |
e51060f0 SH |
457 | if (ret) |
458 | goto err; | |
459 | ||
460 | id->qp = qp; | |
461 | id_priv->qp_num = qp->qp_num; | |
e51060f0 SH |
462 | id_priv->srq = (qp->srq != NULL); |
463 | return 0; | |
464 | err: | |
465 | ib_destroy_qp(qp); | |
466 | return ret; | |
467 | } | |
468 | EXPORT_SYMBOL(rdma_create_qp); | |
469 | ||
470 | void rdma_destroy_qp(struct rdma_cm_id *id) | |
471 | { | |
c5483388 SH |
472 | struct rdma_id_private *id_priv; |
473 | ||
474 | id_priv = container_of(id, struct rdma_id_private, id); | |
475 | mutex_lock(&id_priv->qp_mutex); | |
476 | ib_destroy_qp(id_priv->id.qp); | |
477 | id_priv->id.qp = NULL; | |
478 | mutex_unlock(&id_priv->qp_mutex); | |
e51060f0 SH |
479 | } |
480 | EXPORT_SYMBOL(rdma_destroy_qp); | |
481 | ||
5851bb89 SH |
482 | static int cma_modify_qp_rtr(struct rdma_id_private *id_priv, |
483 | struct rdma_conn_param *conn_param) | |
e51060f0 SH |
484 | { |
485 | struct ib_qp_attr qp_attr; | |
486 | int qp_attr_mask, ret; | |
487 | ||
c5483388 SH |
488 | mutex_lock(&id_priv->qp_mutex); |
489 | if (!id_priv->id.qp) { | |
490 | ret = 0; | |
491 | goto out; | |
492 | } | |
e51060f0 SH |
493 | |
494 | /* Need to update QP attributes from default values. */ | |
495 | qp_attr.qp_state = IB_QPS_INIT; | |
c5483388 | 496 | ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); |
e51060f0 | 497 | if (ret) |
c5483388 | 498 | goto out; |
e51060f0 | 499 | |
c5483388 | 500 | ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); |
e51060f0 | 501 | if (ret) |
c5483388 | 502 | goto out; |
e51060f0 SH |
503 | |
504 | qp_attr.qp_state = IB_QPS_RTR; | |
c5483388 | 505 | ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); |
e51060f0 | 506 | if (ret) |
c5483388 | 507 | goto out; |
e51060f0 | 508 | |
5851bb89 SH |
509 | if (conn_param) |
510 | qp_attr.max_dest_rd_atomic = conn_param->responder_resources; | |
c5483388 SH |
511 | ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); |
512 | out: | |
513 | mutex_unlock(&id_priv->qp_mutex); | |
514 | return ret; | |
e51060f0 SH |
515 | } |
516 | ||
5851bb89 SH |
517 | static int cma_modify_qp_rts(struct rdma_id_private *id_priv, |
518 | struct rdma_conn_param *conn_param) | |
e51060f0 SH |
519 | { |
520 | struct ib_qp_attr qp_attr; | |
521 | int qp_attr_mask, ret; | |
522 | ||
c5483388 SH |
523 | mutex_lock(&id_priv->qp_mutex); |
524 | if (!id_priv->id.qp) { | |
525 | ret = 0; | |
526 | goto out; | |
527 | } | |
e51060f0 SH |
528 | |
529 | qp_attr.qp_state = IB_QPS_RTS; | |
c5483388 | 530 | ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); |
e51060f0 | 531 | if (ret) |
c5483388 | 532 | goto out; |
e51060f0 | 533 | |
5851bb89 SH |
534 | if (conn_param) |
535 | qp_attr.max_rd_atomic = conn_param->initiator_depth; | |
c5483388 SH |
536 | ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); |
537 | out: | |
538 | mutex_unlock(&id_priv->qp_mutex); | |
539 | return ret; | |
e51060f0 SH |
540 | } |
541 | ||
c5483388 | 542 | static int cma_modify_qp_err(struct rdma_id_private *id_priv) |
e51060f0 SH |
543 | { |
544 | struct ib_qp_attr qp_attr; | |
c5483388 | 545 | int ret; |
e51060f0 | 546 | |
c5483388 SH |
547 | mutex_lock(&id_priv->qp_mutex); |
548 | if (!id_priv->id.qp) { | |
549 | ret = 0; | |
550 | goto out; | |
551 | } | |
e51060f0 SH |
552 | |
553 | qp_attr.qp_state = IB_QPS_ERR; | |
c5483388 SH |
554 | ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE); |
555 | out: | |
556 | mutex_unlock(&id_priv->qp_mutex); | |
557 | return ret; | |
e51060f0 SH |
558 | } |
559 | ||
c8f6a362 SH |
560 | static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv, |
561 | struct ib_qp_attr *qp_attr, int *qp_attr_mask) | |
562 | { | |
563 | struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; | |
564 | int ret; | |
565 | ||
566 | ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num, | |
567 | ib_addr_get_pkey(dev_addr), | |
568 | &qp_attr->pkey_index); | |
569 | if (ret) | |
570 | return ret; | |
571 | ||
572 | qp_attr->port_num = id_priv->id.port_num; | |
573 | *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT; | |
574 | ||
575 | if (cma_is_ud_ps(id_priv->id.ps)) { | |
576 | qp_attr->qkey = id_priv->qkey; | |
577 | *qp_attr_mask |= IB_QP_QKEY; | |
578 | } else { | |
579 | qp_attr->qp_access_flags = 0; | |
580 | *qp_attr_mask |= IB_QP_ACCESS_FLAGS; | |
581 | } | |
582 | return 0; | |
583 | } | |
584 | ||
e51060f0 SH |
585 | int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr, |
586 | int *qp_attr_mask) | |
587 | { | |
588 | struct rdma_id_private *id_priv; | |
c8f6a362 | 589 | int ret = 0; |
e51060f0 SH |
590 | |
591 | id_priv = container_of(id, struct rdma_id_private, id); | |
07ebafba TT |
592 | switch (rdma_node_get_transport(id_priv->id.device->node_type)) { |
593 | case RDMA_TRANSPORT_IB: | |
c8f6a362 SH |
594 | if (!id_priv->cm_id.ib || cma_is_ud_ps(id_priv->id.ps)) |
595 | ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask); | |
596 | else | |
597 | ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr, | |
598 | qp_attr_mask); | |
e51060f0 SH |
599 | if (qp_attr->qp_state == IB_QPS_RTR) |
600 | qp_attr->rq_psn = id_priv->seq_num; | |
601 | break; | |
07ebafba | 602 | case RDMA_TRANSPORT_IWARP: |
c8f6a362 | 603 | if (!id_priv->cm_id.iw) { |
8f076531 | 604 | qp_attr->qp_access_flags = 0; |
c8f6a362 SH |
605 | *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS; |
606 | } else | |
607 | ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr, | |
608 | qp_attr_mask); | |
07ebafba | 609 | break; |
e51060f0 SH |
610 | default: |
611 | ret = -ENOSYS; | |
612 | break; | |
613 | } | |
614 | ||
615 | return ret; | |
616 | } | |
617 | EXPORT_SYMBOL(rdma_init_qp_attr); | |
618 | ||
619 | static inline int cma_zero_addr(struct sockaddr *addr) | |
620 | { | |
621 | struct in6_addr *ip6; | |
622 | ||
623 | if (addr->sa_family == AF_INET) | |
6360a02a JP |
624 | return ipv4_is_zeronet( |
625 | ((struct sockaddr_in *)addr)->sin_addr.s_addr); | |
e51060f0 SH |
626 | else { |
627 | ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr; | |
628 | return (ip6->s6_addr32[0] | ip6->s6_addr32[1] | | |
5fd571cb | 629 | ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0; |
e51060f0 SH |
630 | } |
631 | } | |
632 | ||
633 | static inline int cma_loopback_addr(struct sockaddr *addr) | |
634 | { | |
6360a02a | 635 | return ipv4_is_loopback(((struct sockaddr_in *) addr)->sin_addr.s_addr); |
e51060f0 SH |
636 | } |
637 | ||
638 | static inline int cma_any_addr(struct sockaddr *addr) | |
639 | { | |
640 | return cma_zero_addr(addr) || cma_loopback_addr(addr); | |
641 | } | |
642 | ||
628e5f6d SH |
643 | static inline __be16 cma_port(struct sockaddr *addr) |
644 | { | |
645 | if (addr->sa_family == AF_INET) | |
646 | return ((struct sockaddr_in *) addr)->sin_port; | |
647 | else | |
648 | return ((struct sockaddr_in6 *) addr)->sin6_port; | |
649 | } | |
650 | ||
e51060f0 SH |
651 | static inline int cma_any_port(struct sockaddr *addr) |
652 | { | |
628e5f6d | 653 | return !cma_port(addr); |
e51060f0 SH |
654 | } |
655 | ||
656 | static int cma_get_net_info(void *hdr, enum rdma_port_space ps, | |
1b90c137 | 657 | u8 *ip_ver, __be16 *port, |
e51060f0 SH |
658 | union cma_ip_addr **src, union cma_ip_addr **dst) |
659 | { | |
660 | switch (ps) { | |
661 | case RDMA_PS_SDP: | |
662 | if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) != | |
663 | SDP_MAJ_VERSION) | |
664 | return -EINVAL; | |
665 | ||
666 | *ip_ver = sdp_get_ip_ver(hdr); | |
667 | *port = ((struct sdp_hh *) hdr)->port; | |
668 | *src = &((struct sdp_hh *) hdr)->src_addr; | |
669 | *dst = &((struct sdp_hh *) hdr)->dst_addr; | |
670 | break; | |
671 | default: | |
672 | if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION) | |
673 | return -EINVAL; | |
674 | ||
675 | *ip_ver = cma_get_ip_ver(hdr); | |
676 | *port = ((struct cma_hdr *) hdr)->port; | |
677 | *src = &((struct cma_hdr *) hdr)->src_addr; | |
678 | *dst = &((struct cma_hdr *) hdr)->dst_addr; | |
679 | break; | |
680 | } | |
681 | ||
682 | if (*ip_ver != 4 && *ip_ver != 6) | |
683 | return -EINVAL; | |
684 | return 0; | |
685 | } | |
686 | ||
687 | static void cma_save_net_info(struct rdma_addr *addr, | |
688 | struct rdma_addr *listen_addr, | |
1b90c137 | 689 | u8 ip_ver, __be16 port, |
e51060f0 SH |
690 | union cma_ip_addr *src, union cma_ip_addr *dst) |
691 | { | |
692 | struct sockaddr_in *listen4, *ip4; | |
693 | struct sockaddr_in6 *listen6, *ip6; | |
694 | ||
695 | switch (ip_ver) { | |
696 | case 4: | |
697 | listen4 = (struct sockaddr_in *) &listen_addr->src_addr; | |
698 | ip4 = (struct sockaddr_in *) &addr->src_addr; | |
699 | ip4->sin_family = listen4->sin_family; | |
700 | ip4->sin_addr.s_addr = dst->ip4.addr; | |
701 | ip4->sin_port = listen4->sin_port; | |
702 | ||
703 | ip4 = (struct sockaddr_in *) &addr->dst_addr; | |
704 | ip4->sin_family = listen4->sin_family; | |
705 | ip4->sin_addr.s_addr = src->ip4.addr; | |
706 | ip4->sin_port = port; | |
707 | break; | |
708 | case 6: | |
709 | listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr; | |
710 | ip6 = (struct sockaddr_in6 *) &addr->src_addr; | |
711 | ip6->sin6_family = listen6->sin6_family; | |
712 | ip6->sin6_addr = dst->ip6; | |
713 | ip6->sin6_port = listen6->sin6_port; | |
714 | ||
715 | ip6 = (struct sockaddr_in6 *) &addr->dst_addr; | |
716 | ip6->sin6_family = listen6->sin6_family; | |
717 | ip6->sin6_addr = src->ip6; | |
718 | ip6->sin6_port = port; | |
719 | break; | |
720 | default: | |
721 | break; | |
722 | } | |
723 | } | |
724 | ||
725 | static inline int cma_user_data_offset(enum rdma_port_space ps) | |
726 | { | |
727 | switch (ps) { | |
728 | case RDMA_PS_SDP: | |
729 | return 0; | |
730 | default: | |
731 | return sizeof(struct cma_hdr); | |
732 | } | |
733 | } | |
734 | ||
e51060f0 SH |
735 | static void cma_cancel_route(struct rdma_id_private *id_priv) |
736 | { | |
07ebafba TT |
737 | switch (rdma_node_get_transport(id_priv->id.device->node_type)) { |
738 | case RDMA_TRANSPORT_IB: | |
e51060f0 SH |
739 | if (id_priv->query) |
740 | ib_sa_cancel_query(id_priv->query_id, id_priv->query); | |
741 | break; | |
742 | default: | |
743 | break; | |
744 | } | |
745 | } | |
746 | ||
e51060f0 SH |
747 | static void cma_cancel_listens(struct rdma_id_private *id_priv) |
748 | { | |
749 | struct rdma_id_private *dev_id_priv; | |
750 | ||
d02d1f53 SH |
751 | /* |
752 | * Remove from listen_any_list to prevent added devices from spawning | |
753 | * additional listen requests. | |
754 | */ | |
e51060f0 SH |
755 | mutex_lock(&lock); |
756 | list_del(&id_priv->list); | |
757 | ||
758 | while (!list_empty(&id_priv->listen_list)) { | |
759 | dev_id_priv = list_entry(id_priv->listen_list.next, | |
760 | struct rdma_id_private, listen_list); | |
d02d1f53 SH |
761 | /* sync with device removal to avoid duplicate destruction */ |
762 | list_del_init(&dev_id_priv->list); | |
763 | list_del(&dev_id_priv->listen_list); | |
764 | mutex_unlock(&lock); | |
765 | ||
766 | rdma_destroy_id(&dev_id_priv->id); | |
767 | mutex_lock(&lock); | |
e51060f0 SH |
768 | } |
769 | mutex_unlock(&lock); | |
770 | } | |
771 | ||
772 | static void cma_cancel_operation(struct rdma_id_private *id_priv, | |
773 | enum cma_state state) | |
774 | { | |
775 | switch (state) { | |
776 | case CMA_ADDR_QUERY: | |
777 | rdma_addr_cancel(&id_priv->id.route.addr.dev_addr); | |
778 | break; | |
779 | case CMA_ROUTE_QUERY: | |
780 | cma_cancel_route(id_priv); | |
781 | break; | |
782 | case CMA_LISTEN: | |
783 | if (cma_any_addr(&id_priv->id.route.addr.src_addr) && | |
784 | !id_priv->cma_dev) | |
785 | cma_cancel_listens(id_priv); | |
786 | break; | |
787 | default: | |
788 | break; | |
789 | } | |
790 | } | |
791 | ||
792 | static void cma_release_port(struct rdma_id_private *id_priv) | |
793 | { | |
794 | struct rdma_bind_list *bind_list = id_priv->bind_list; | |
795 | ||
796 | if (!bind_list) | |
797 | return; | |
798 | ||
799 | mutex_lock(&lock); | |
800 | hlist_del(&id_priv->node); | |
801 | if (hlist_empty(&bind_list->owners)) { | |
802 | idr_remove(bind_list->ps, bind_list->port); | |
803 | kfree(bind_list); | |
804 | } | |
805 | mutex_unlock(&lock); | |
806 | } | |
807 | ||
c8f6a362 SH |
808 | static void cma_leave_mc_groups(struct rdma_id_private *id_priv) |
809 | { | |
810 | struct cma_multicast *mc; | |
811 | ||
812 | while (!list_empty(&id_priv->mc_list)) { | |
813 | mc = container_of(id_priv->mc_list.next, | |
814 | struct cma_multicast, list); | |
815 | list_del(&mc->list); | |
816 | ib_sa_free_multicast(mc->multicast.ib); | |
817 | kfree(mc); | |
818 | } | |
819 | } | |
820 | ||
e51060f0 SH |
821 | void rdma_destroy_id(struct rdma_cm_id *id) |
822 | { | |
823 | struct rdma_id_private *id_priv; | |
824 | enum cma_state state; | |
825 | ||
826 | id_priv = container_of(id, struct rdma_id_private, id); | |
827 | state = cma_exch(id_priv, CMA_DESTROYING); | |
828 | cma_cancel_operation(id_priv, state); | |
829 | ||
61a73c70 | 830 | mutex_lock(&lock); |
e51060f0 | 831 | if (id_priv->cma_dev) { |
61a73c70 | 832 | mutex_unlock(&lock); |
07ebafba TT |
833 | switch (rdma_node_get_transport(id->device->node_type)) { |
834 | case RDMA_TRANSPORT_IB: | |
3cd96564 | 835 | if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib)) |
e51060f0 SH |
836 | ib_destroy_cm_id(id_priv->cm_id.ib); |
837 | break; | |
07ebafba TT |
838 | case RDMA_TRANSPORT_IWARP: |
839 | if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw)) | |
840 | iw_destroy_cm_id(id_priv->cm_id.iw); | |
841 | break; | |
e51060f0 SH |
842 | default: |
843 | break; | |
844 | } | |
c8f6a362 | 845 | cma_leave_mc_groups(id_priv); |
3cd96564 | 846 | mutex_lock(&lock); |
e51060f0 | 847 | cma_detach_from_dev(id_priv); |
e51060f0 | 848 | } |
61a73c70 | 849 | mutex_unlock(&lock); |
e51060f0 SH |
850 | |
851 | cma_release_port(id_priv); | |
852 | cma_deref_id(id_priv); | |
853 | wait_for_completion(&id_priv->comp); | |
854 | ||
d02d1f53 SH |
855 | if (id_priv->internal_id) |
856 | cma_deref_id(id_priv->id.context); | |
857 | ||
e51060f0 SH |
858 | kfree(id_priv->id.route.path_rec); |
859 | kfree(id_priv); | |
860 | } | |
861 | EXPORT_SYMBOL(rdma_destroy_id); | |
862 | ||
863 | static int cma_rep_recv(struct rdma_id_private *id_priv) | |
864 | { | |
865 | int ret; | |
866 | ||
5851bb89 | 867 | ret = cma_modify_qp_rtr(id_priv, NULL); |
e51060f0 SH |
868 | if (ret) |
869 | goto reject; | |
870 | ||
5851bb89 | 871 | ret = cma_modify_qp_rts(id_priv, NULL); |
e51060f0 SH |
872 | if (ret) |
873 | goto reject; | |
874 | ||
875 | ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0); | |
876 | if (ret) | |
877 | goto reject; | |
878 | ||
879 | return 0; | |
880 | reject: | |
c5483388 | 881 | cma_modify_qp_err(id_priv); |
e51060f0 SH |
882 | ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED, |
883 | NULL, 0, NULL, 0); | |
884 | return ret; | |
885 | } | |
886 | ||
887 | static int cma_verify_rep(struct rdma_id_private *id_priv, void *data) | |
888 | { | |
889 | if (id_priv->id.ps == RDMA_PS_SDP && | |
890 | sdp_get_majv(((struct sdp_hah *) data)->sdp_version) != | |
891 | SDP_MAJ_VERSION) | |
892 | return -EINVAL; | |
893 | ||
894 | return 0; | |
895 | } | |
896 | ||
a1b1b61f SH |
897 | static void cma_set_rep_event_data(struct rdma_cm_event *event, |
898 | struct ib_cm_rep_event_param *rep_data, | |
899 | void *private_data) | |
900 | { | |
901 | event->param.conn.private_data = private_data; | |
902 | event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE; | |
903 | event->param.conn.responder_resources = rep_data->responder_resources; | |
904 | event->param.conn.initiator_depth = rep_data->initiator_depth; | |
905 | event->param.conn.flow_control = rep_data->flow_control; | |
906 | event->param.conn.rnr_retry_count = rep_data->rnr_retry_count; | |
907 | event->param.conn.srq = rep_data->srq; | |
908 | event->param.conn.qp_num = rep_data->remote_qpn; | |
909 | } | |
910 | ||
e51060f0 SH |
911 | static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) |
912 | { | |
913 | struct rdma_id_private *id_priv = cm_id->context; | |
a1b1b61f SH |
914 | struct rdma_cm_event event; |
915 | int ret = 0; | |
e51060f0 | 916 | |
de910bd9 | 917 | if (cma_disable_callback(id_priv, CMA_CONNECT)) |
8aa08602 | 918 | return 0; |
e51060f0 | 919 | |
a1b1b61f | 920 | memset(&event, 0, sizeof event); |
e51060f0 SH |
921 | switch (ib_event->event) { |
922 | case IB_CM_REQ_ERROR: | |
923 | case IB_CM_REP_ERROR: | |
a1b1b61f SH |
924 | event.event = RDMA_CM_EVENT_UNREACHABLE; |
925 | event.status = -ETIMEDOUT; | |
e51060f0 SH |
926 | break; |
927 | case IB_CM_REP_RECEIVED: | |
a1b1b61f SH |
928 | event.status = cma_verify_rep(id_priv, ib_event->private_data); |
929 | if (event.status) | |
930 | event.event = RDMA_CM_EVENT_CONNECT_ERROR; | |
e51060f0 | 931 | else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) { |
a1b1b61f SH |
932 | event.status = cma_rep_recv(id_priv); |
933 | event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR : | |
934 | RDMA_CM_EVENT_ESTABLISHED; | |
e51060f0 | 935 | } else |
a1b1b61f SH |
936 | event.event = RDMA_CM_EVENT_CONNECT_RESPONSE; |
937 | cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd, | |
938 | ib_event->private_data); | |
e51060f0 SH |
939 | break; |
940 | case IB_CM_RTU_RECEIVED: | |
0fe313b0 SH |
941 | case IB_CM_USER_ESTABLISHED: |
942 | event.event = RDMA_CM_EVENT_ESTABLISHED; | |
e51060f0 SH |
943 | break; |
944 | case IB_CM_DREQ_ERROR: | |
a1b1b61f | 945 | event.status = -ETIMEDOUT; /* fall through */ |
e51060f0 SH |
946 | case IB_CM_DREQ_RECEIVED: |
947 | case IB_CM_DREP_RECEIVED: | |
948 | if (!cma_comp_exch(id_priv, CMA_CONNECT, CMA_DISCONNECT)) | |
949 | goto out; | |
a1b1b61f | 950 | event.event = RDMA_CM_EVENT_DISCONNECTED; |
e51060f0 SH |
951 | break; |
952 | case IB_CM_TIMEWAIT_EXIT: | |
953 | case IB_CM_MRA_RECEIVED: | |
954 | /* ignore event */ | |
955 | goto out; | |
956 | case IB_CM_REJ_RECEIVED: | |
c5483388 | 957 | cma_modify_qp_err(id_priv); |
a1b1b61f SH |
958 | event.status = ib_event->param.rej_rcvd.reason; |
959 | event.event = RDMA_CM_EVENT_REJECTED; | |
960 | event.param.conn.private_data = ib_event->private_data; | |
961 | event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; | |
e51060f0 SH |
962 | break; |
963 | default: | |
468f2239 | 964 | printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n", |
e51060f0 SH |
965 | ib_event->event); |
966 | goto out; | |
967 | } | |
968 | ||
a1b1b61f | 969 | ret = id_priv->id.event_handler(&id_priv->id, &event); |
e51060f0 SH |
970 | if (ret) { |
971 | /* Destroy the CM ID by returning a non-zero value. */ | |
972 | id_priv->cm_id.ib = NULL; | |
973 | cma_exch(id_priv, CMA_DESTROYING); | |
de910bd9 | 974 | mutex_unlock(&id_priv->handler_mutex); |
e51060f0 SH |
975 | rdma_destroy_id(&id_priv->id); |
976 | return ret; | |
977 | } | |
978 | out: | |
de910bd9 | 979 | mutex_unlock(&id_priv->handler_mutex); |
e51060f0 SH |
980 | return ret; |
981 | } | |
982 | ||
628e5f6d SH |
983 | static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id, |
984 | struct ib_cm_event *ib_event) | |
e51060f0 SH |
985 | { |
986 | struct rdma_id_private *id_priv; | |
987 | struct rdma_cm_id *id; | |
988 | struct rdma_route *rt; | |
989 | union cma_ip_addr *src, *dst; | |
1b90c137 | 990 | __be16 port; |
e51060f0 | 991 | u8 ip_ver; |
64c5e613 | 992 | int ret; |
e51060f0 | 993 | |
3f168d2b KK |
994 | if (cma_get_net_info(ib_event->private_data, listen_id->ps, |
995 | &ip_ver, &port, &src, &dst)) | |
996 | goto err; | |
997 | ||
e51060f0 SH |
998 | id = rdma_create_id(listen_id->event_handler, listen_id->context, |
999 | listen_id->ps); | |
1000 | if (IS_ERR(id)) | |
3f168d2b KK |
1001 | goto err; |
1002 | ||
1003 | cma_save_net_info(&id->route.addr, &listen_id->route.addr, | |
1004 | ip_ver, port, src, dst); | |
e51060f0 SH |
1005 | |
1006 | rt = &id->route; | |
1007 | rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1; | |
3f168d2b KK |
1008 | rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths, |
1009 | GFP_KERNEL); | |
e51060f0 | 1010 | if (!rt->path_rec) |
3f168d2b | 1011 | goto destroy_id; |
e51060f0 | 1012 | |
e51060f0 SH |
1013 | rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path; |
1014 | if (rt->num_paths == 2) | |
1015 | rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path; | |
1016 | ||
e51060f0 | 1017 | ib_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid); |
64c5e613 OG |
1018 | ret = rdma_translate_ip(&id->route.addr.src_addr, |
1019 | &id->route.addr.dev_addr); | |
1020 | if (ret) | |
1021 | goto destroy_id; | |
e51060f0 SH |
1022 | |
1023 | id_priv = container_of(id, struct rdma_id_private, id); | |
1024 | id_priv->state = CMA_CONNECT; | |
1025 | return id_priv; | |
3f168d2b KK |
1026 | |
1027 | destroy_id: | |
e51060f0 | 1028 | rdma_destroy_id(id); |
3f168d2b | 1029 | err: |
e51060f0 SH |
1030 | return NULL; |
1031 | } | |
1032 | ||
628e5f6d SH |
1033 | static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id, |
1034 | struct ib_cm_event *ib_event) | |
1035 | { | |
1036 | struct rdma_id_private *id_priv; | |
1037 | struct rdma_cm_id *id; | |
1038 | union cma_ip_addr *src, *dst; | |
1b90c137 | 1039 | __be16 port; |
628e5f6d SH |
1040 | u8 ip_ver; |
1041 | int ret; | |
1042 | ||
1043 | id = rdma_create_id(listen_id->event_handler, listen_id->context, | |
1044 | listen_id->ps); | |
1045 | if (IS_ERR(id)) | |
1046 | return NULL; | |
1047 | ||
1048 | ||
1049 | if (cma_get_net_info(ib_event->private_data, listen_id->ps, | |
1050 | &ip_ver, &port, &src, &dst)) | |
1051 | goto err; | |
1052 | ||
1053 | cma_save_net_info(&id->route.addr, &listen_id->route.addr, | |
1054 | ip_ver, port, src, dst); | |
1055 | ||
1056 | ret = rdma_translate_ip(&id->route.addr.src_addr, | |
1057 | &id->route.addr.dev_addr); | |
1058 | if (ret) | |
1059 | goto err; | |
1060 | ||
1061 | id_priv = container_of(id, struct rdma_id_private, id); | |
1062 | id_priv->state = CMA_CONNECT; | |
1063 | return id_priv; | |
1064 | err: | |
1065 | rdma_destroy_id(id); | |
1066 | return NULL; | |
1067 | } | |
1068 | ||
a1b1b61f SH |
1069 | static void cma_set_req_event_data(struct rdma_cm_event *event, |
1070 | struct ib_cm_req_event_param *req_data, | |
1071 | void *private_data, int offset) | |
1072 | { | |
1073 | event->param.conn.private_data = private_data + offset; | |
1074 | event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset; | |
1075 | event->param.conn.responder_resources = req_data->responder_resources; | |
1076 | event->param.conn.initiator_depth = req_data->initiator_depth; | |
1077 | event->param.conn.flow_control = req_data->flow_control; | |
1078 | event->param.conn.retry_count = req_data->retry_count; | |
1079 | event->param.conn.rnr_retry_count = req_data->rnr_retry_count; | |
1080 | event->param.conn.srq = req_data->srq; | |
1081 | event->param.conn.qp_num = req_data->remote_qpn; | |
1082 | } | |
1083 | ||
e51060f0 SH |
1084 | static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) |
1085 | { | |
1086 | struct rdma_id_private *listen_id, *conn_id; | |
a1b1b61f | 1087 | struct rdma_cm_event event; |
e51060f0 SH |
1088 | int offset, ret; |
1089 | ||
1090 | listen_id = cm_id->context; | |
de910bd9 | 1091 | if (cma_disable_callback(listen_id, CMA_LISTEN)) |
8aa08602 | 1092 | return -ECONNABORTED; |
e51060f0 | 1093 | |
628e5f6d SH |
1094 | memset(&event, 0, sizeof event); |
1095 | offset = cma_user_data_offset(listen_id->id.ps); | |
1096 | event.event = RDMA_CM_EVENT_CONNECT_REQUEST; | |
c8f6a362 | 1097 | if (cma_is_ud_ps(listen_id->id.ps)) { |
628e5f6d SH |
1098 | conn_id = cma_new_udp_id(&listen_id->id, ib_event); |
1099 | event.param.ud.private_data = ib_event->private_data + offset; | |
1100 | event.param.ud.private_data_len = | |
1101 | IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset; | |
1102 | } else { | |
1103 | conn_id = cma_new_conn_id(&listen_id->id, ib_event); | |
1104 | cma_set_req_event_data(&event, &ib_event->param.req_rcvd, | |
1105 | ib_event->private_data, offset); | |
1106 | } | |
e51060f0 SH |
1107 | if (!conn_id) { |
1108 | ret = -ENOMEM; | |
1109 | goto out; | |
1110 | } | |
1111 | ||
de910bd9 | 1112 | mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING); |
61a73c70 | 1113 | mutex_lock(&lock); |
07ebafba | 1114 | ret = cma_acquire_dev(conn_id); |
61a73c70 | 1115 | mutex_unlock(&lock); |
a1a733f6 KK |
1116 | if (ret) |
1117 | goto release_conn_id; | |
e51060f0 SH |
1118 | |
1119 | conn_id->cm_id.ib = cm_id; | |
1120 | cm_id->context = conn_id; | |
1121 | cm_id->cm_handler = cma_ib_handler; | |
1122 | ||
a1b1b61f | 1123 | ret = conn_id->id.event_handler(&conn_id->id, &event); |
45d9478d | 1124 | if (!ret) { |
ead595ae SH |
1125 | /* |
1126 | * Acquire mutex to prevent user executing rdma_destroy_id() | |
1127 | * while we're accessing the cm_id. | |
1128 | */ | |
1129 | mutex_lock(&lock); | |
1130 | if (cma_comp(conn_id, CMA_CONNECT) && | |
1131 | !cma_is_ud_ps(conn_id->id.ps)) | |
1132 | ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0); | |
1133 | mutex_unlock(&lock); | |
de910bd9 | 1134 | mutex_unlock(&conn_id->handler_mutex); |
a1a733f6 | 1135 | goto out; |
45d9478d | 1136 | } |
a1a733f6 KK |
1137 | |
1138 | /* Destroy the CM ID by returning a non-zero value. */ | |
1139 | conn_id->cm_id.ib = NULL; | |
1140 | ||
1141 | release_conn_id: | |
1142 | cma_exch(conn_id, CMA_DESTROYING); | |
de910bd9 | 1143 | mutex_unlock(&conn_id->handler_mutex); |
a1a733f6 KK |
1144 | rdma_destroy_id(&conn_id->id); |
1145 | ||
e51060f0 | 1146 | out: |
de910bd9 | 1147 | mutex_unlock(&listen_id->handler_mutex); |
e51060f0 SH |
1148 | return ret; |
1149 | } | |
1150 | ||
1151 | static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr) | |
1152 | { | |
628e5f6d | 1153 | return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr))); |
e51060f0 SH |
1154 | } |
1155 | ||
1156 | static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr, | |
1157 | struct ib_cm_compare_data *compare) | |
1158 | { | |
1159 | struct cma_hdr *cma_data, *cma_mask; | |
1160 | struct sdp_hh *sdp_data, *sdp_mask; | |
1b90c137 | 1161 | __be32 ip4_addr; |
e51060f0 SH |
1162 | struct in6_addr ip6_addr; |
1163 | ||
1164 | memset(compare, 0, sizeof *compare); | |
1165 | cma_data = (void *) compare->data; | |
1166 | cma_mask = (void *) compare->mask; | |
1167 | sdp_data = (void *) compare->data; | |
1168 | sdp_mask = (void *) compare->mask; | |
1169 | ||
1170 | switch (addr->sa_family) { | |
1171 | case AF_INET: | |
1172 | ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr; | |
1173 | if (ps == RDMA_PS_SDP) { | |
1174 | sdp_set_ip_ver(sdp_data, 4); | |
1175 | sdp_set_ip_ver(sdp_mask, 0xF); | |
1176 | sdp_data->dst_addr.ip4.addr = ip4_addr; | |
1b90c137 | 1177 | sdp_mask->dst_addr.ip4.addr = htonl(~0); |
e51060f0 SH |
1178 | } else { |
1179 | cma_set_ip_ver(cma_data, 4); | |
1180 | cma_set_ip_ver(cma_mask, 0xF); | |
1181 | cma_data->dst_addr.ip4.addr = ip4_addr; | |
1b90c137 | 1182 | cma_mask->dst_addr.ip4.addr = htonl(~0); |
e51060f0 SH |
1183 | } |
1184 | break; | |
1185 | case AF_INET6: | |
1186 | ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr; | |
1187 | if (ps == RDMA_PS_SDP) { | |
1188 | sdp_set_ip_ver(sdp_data, 6); | |
1189 | sdp_set_ip_ver(sdp_mask, 0xF); | |
1190 | sdp_data->dst_addr.ip6 = ip6_addr; | |
1191 | memset(&sdp_mask->dst_addr.ip6, 0xFF, | |
1192 | sizeof sdp_mask->dst_addr.ip6); | |
1193 | } else { | |
1194 | cma_set_ip_ver(cma_data, 6); | |
1195 | cma_set_ip_ver(cma_mask, 0xF); | |
1196 | cma_data->dst_addr.ip6 = ip6_addr; | |
1197 | memset(&cma_mask->dst_addr.ip6, 0xFF, | |
1198 | sizeof cma_mask->dst_addr.ip6); | |
1199 | } | |
1200 | break; | |
1201 | default: | |
1202 | break; | |
1203 | } | |
1204 | } | |
1205 | ||
07ebafba TT |
1206 | static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event) |
1207 | { | |
1208 | struct rdma_id_private *id_priv = iw_id->context; | |
a1b1b61f | 1209 | struct rdma_cm_event event; |
07ebafba TT |
1210 | struct sockaddr_in *sin; |
1211 | int ret = 0; | |
1212 | ||
de910bd9 | 1213 | if (cma_disable_callback(id_priv, CMA_CONNECT)) |
be65f086 | 1214 | return 0; |
07ebafba | 1215 | |
be65f086 | 1216 | memset(&event, 0, sizeof event); |
07ebafba TT |
1217 | switch (iw_event->event) { |
1218 | case IW_CM_EVENT_CLOSE: | |
a1b1b61f | 1219 | event.event = RDMA_CM_EVENT_DISCONNECTED; |
07ebafba TT |
1220 | break; |
1221 | case IW_CM_EVENT_CONNECT_REPLY: | |
1222 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; | |
1223 | *sin = iw_event->local_addr; | |
1224 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr; | |
1225 | *sin = iw_event->remote_addr; | |
881a045f SW |
1226 | switch (iw_event->status) { |
1227 | case 0: | |
a1b1b61f | 1228 | event.event = RDMA_CM_EVENT_ESTABLISHED; |
881a045f SW |
1229 | break; |
1230 | case -ECONNRESET: | |
1231 | case -ECONNREFUSED: | |
1232 | event.event = RDMA_CM_EVENT_REJECTED; | |
1233 | break; | |
1234 | case -ETIMEDOUT: | |
1235 | event.event = RDMA_CM_EVENT_UNREACHABLE; | |
1236 | break; | |
1237 | default: | |
1238 | event.event = RDMA_CM_EVENT_CONNECT_ERROR; | |
1239 | break; | |
1240 | } | |
07ebafba TT |
1241 | break; |
1242 | case IW_CM_EVENT_ESTABLISHED: | |
a1b1b61f | 1243 | event.event = RDMA_CM_EVENT_ESTABLISHED; |
07ebafba TT |
1244 | break; |
1245 | default: | |
1246 | BUG_ON(1); | |
1247 | } | |
1248 | ||
a1b1b61f SH |
1249 | event.status = iw_event->status; |
1250 | event.param.conn.private_data = iw_event->private_data; | |
1251 | event.param.conn.private_data_len = iw_event->private_data_len; | |
1252 | ret = id_priv->id.event_handler(&id_priv->id, &event); | |
07ebafba TT |
1253 | if (ret) { |
1254 | /* Destroy the CM ID by returning a non-zero value. */ | |
1255 | id_priv->cm_id.iw = NULL; | |
1256 | cma_exch(id_priv, CMA_DESTROYING); | |
de910bd9 | 1257 | mutex_unlock(&id_priv->handler_mutex); |
07ebafba TT |
1258 | rdma_destroy_id(&id_priv->id); |
1259 | return ret; | |
1260 | } | |
1261 | ||
de910bd9 | 1262 | mutex_unlock(&id_priv->handler_mutex); |
07ebafba TT |
1263 | return ret; |
1264 | } | |
1265 | ||
1266 | static int iw_conn_req_handler(struct iw_cm_id *cm_id, | |
1267 | struct iw_cm_event *iw_event) | |
1268 | { | |
1269 | struct rdma_cm_id *new_cm_id; | |
1270 | struct rdma_id_private *listen_id, *conn_id; | |
1271 | struct sockaddr_in *sin; | |
1272 | struct net_device *dev = NULL; | |
a1b1b61f | 1273 | struct rdma_cm_event event; |
07ebafba | 1274 | int ret; |
8d8293cf | 1275 | struct ib_device_attr attr; |
07ebafba TT |
1276 | |
1277 | listen_id = cm_id->context; | |
de910bd9 | 1278 | if (cma_disable_callback(listen_id, CMA_LISTEN)) |
8aa08602 | 1279 | return -ECONNABORTED; |
07ebafba TT |
1280 | |
1281 | /* Create a new RDMA id for the new IW CM ID */ | |
1282 | new_cm_id = rdma_create_id(listen_id->id.event_handler, | |
1283 | listen_id->id.context, | |
1284 | RDMA_PS_TCP); | |
10f32065 | 1285 | if (IS_ERR(new_cm_id)) { |
07ebafba TT |
1286 | ret = -ENOMEM; |
1287 | goto out; | |
1288 | } | |
1289 | conn_id = container_of(new_cm_id, struct rdma_id_private, id); | |
de910bd9 | 1290 | mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING); |
07ebafba TT |
1291 | conn_id->state = CMA_CONNECT; |
1292 | ||
1ab35276 | 1293 | dev = ip_dev_find(&init_net, iw_event->local_addr.sin_addr.s_addr); |
07ebafba TT |
1294 | if (!dev) { |
1295 | ret = -EADDRNOTAVAIL; | |
de910bd9 | 1296 | mutex_unlock(&conn_id->handler_mutex); |
07ebafba TT |
1297 | rdma_destroy_id(new_cm_id); |
1298 | goto out; | |
1299 | } | |
1300 | ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL); | |
1301 | if (ret) { | |
de910bd9 | 1302 | mutex_unlock(&conn_id->handler_mutex); |
07ebafba TT |
1303 | rdma_destroy_id(new_cm_id); |
1304 | goto out; | |
1305 | } | |
1306 | ||
61a73c70 | 1307 | mutex_lock(&lock); |
07ebafba | 1308 | ret = cma_acquire_dev(conn_id); |
61a73c70 | 1309 | mutex_unlock(&lock); |
07ebafba | 1310 | if (ret) { |
de910bd9 | 1311 | mutex_unlock(&conn_id->handler_mutex); |
07ebafba TT |
1312 | rdma_destroy_id(new_cm_id); |
1313 | goto out; | |
1314 | } | |
1315 | ||
1316 | conn_id->cm_id.iw = cm_id; | |
1317 | cm_id->context = conn_id; | |
1318 | cm_id->cm_handler = cma_iw_handler; | |
1319 | ||
1320 | sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr; | |
1321 | *sin = iw_event->local_addr; | |
1322 | sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr; | |
1323 | *sin = iw_event->remote_addr; | |
1324 | ||
8d8293cf SW |
1325 | ret = ib_query_device(conn_id->id.device, &attr); |
1326 | if (ret) { | |
de910bd9 | 1327 | mutex_unlock(&conn_id->handler_mutex); |
8d8293cf SW |
1328 | rdma_destroy_id(new_cm_id); |
1329 | goto out; | |
1330 | } | |
1331 | ||
a1b1b61f SH |
1332 | memset(&event, 0, sizeof event); |
1333 | event.event = RDMA_CM_EVENT_CONNECT_REQUEST; | |
1334 | event.param.conn.private_data = iw_event->private_data; | |
1335 | event.param.conn.private_data_len = iw_event->private_data_len; | |
8d8293cf SW |
1336 | event.param.conn.initiator_depth = attr.max_qp_init_rd_atom; |
1337 | event.param.conn.responder_resources = attr.max_qp_rd_atom; | |
a1b1b61f | 1338 | ret = conn_id->id.event_handler(&conn_id->id, &event); |
07ebafba TT |
1339 | if (ret) { |
1340 | /* User wants to destroy the CM ID */ | |
1341 | conn_id->cm_id.iw = NULL; | |
1342 | cma_exch(conn_id, CMA_DESTROYING); | |
de910bd9 | 1343 | mutex_unlock(&conn_id->handler_mutex); |
07ebafba | 1344 | rdma_destroy_id(&conn_id->id); |
de910bd9 | 1345 | goto out; |
07ebafba TT |
1346 | } |
1347 | ||
de910bd9 OG |
1348 | mutex_unlock(&conn_id->handler_mutex); |
1349 | ||
07ebafba TT |
1350 | out: |
1351 | if (dev) | |
1352 | dev_put(dev); | |
de910bd9 | 1353 | mutex_unlock(&listen_id->handler_mutex); |
07ebafba TT |
1354 | return ret; |
1355 | } | |
1356 | ||
e51060f0 SH |
1357 | static int cma_ib_listen(struct rdma_id_private *id_priv) |
1358 | { | |
1359 | struct ib_cm_compare_data compare_data; | |
1360 | struct sockaddr *addr; | |
1361 | __be64 svc_id; | |
1362 | int ret; | |
1363 | ||
1364 | id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_req_handler, | |
1365 | id_priv); | |
1366 | if (IS_ERR(id_priv->cm_id.ib)) | |
1367 | return PTR_ERR(id_priv->cm_id.ib); | |
1368 | ||
1369 | addr = &id_priv->id.route.addr.src_addr; | |
1370 | svc_id = cma_get_service_id(id_priv->id.ps, addr); | |
1371 | if (cma_any_addr(addr)) | |
1372 | ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL); | |
1373 | else { | |
1374 | cma_set_compare_data(id_priv->id.ps, addr, &compare_data); | |
1375 | ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data); | |
1376 | } | |
1377 | ||
1378 | if (ret) { | |
1379 | ib_destroy_cm_id(id_priv->cm_id.ib); | |
1380 | id_priv->cm_id.ib = NULL; | |
1381 | } | |
1382 | ||
1383 | return ret; | |
1384 | } | |
1385 | ||
07ebafba TT |
1386 | static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog) |
1387 | { | |
1388 | int ret; | |
1389 | struct sockaddr_in *sin; | |
1390 | ||
1391 | id_priv->cm_id.iw = iw_create_cm_id(id_priv->id.device, | |
1392 | iw_conn_req_handler, | |
1393 | id_priv); | |
1394 | if (IS_ERR(id_priv->cm_id.iw)) | |
1395 | return PTR_ERR(id_priv->cm_id.iw); | |
1396 | ||
1397 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; | |
1398 | id_priv->cm_id.iw->local_addr = *sin; | |
1399 | ||
1400 | ret = iw_cm_listen(id_priv->cm_id.iw, backlog); | |
1401 | ||
1402 | if (ret) { | |
1403 | iw_destroy_cm_id(id_priv->cm_id.iw); | |
1404 | id_priv->cm_id.iw = NULL; | |
1405 | } | |
1406 | ||
1407 | return ret; | |
1408 | } | |
1409 | ||
e51060f0 SH |
1410 | static int cma_listen_handler(struct rdma_cm_id *id, |
1411 | struct rdma_cm_event *event) | |
1412 | { | |
1413 | struct rdma_id_private *id_priv = id->context; | |
1414 | ||
1415 | id->context = id_priv->id.context; | |
1416 | id->event_handler = id_priv->id.event_handler; | |
1417 | return id_priv->id.event_handler(id, event); | |
1418 | } | |
1419 | ||
1420 | static void cma_listen_on_dev(struct rdma_id_private *id_priv, | |
1421 | struct cma_device *cma_dev) | |
1422 | { | |
1423 | struct rdma_id_private *dev_id_priv; | |
1424 | struct rdma_cm_id *id; | |
1425 | int ret; | |
1426 | ||
1427 | id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps); | |
1428 | if (IS_ERR(id)) | |
1429 | return; | |
1430 | ||
1431 | dev_id_priv = container_of(id, struct rdma_id_private, id); | |
1432 | ||
1433 | dev_id_priv->state = CMA_ADDR_BOUND; | |
1434 | memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr, | |
1435 | ip_addr_size(&id_priv->id.route.addr.src_addr)); | |
1436 | ||
1437 | cma_attach_to_dev(dev_id_priv, cma_dev); | |
1438 | list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list); | |
d02d1f53 SH |
1439 | atomic_inc(&id_priv->refcount); |
1440 | dev_id_priv->internal_id = 1; | |
e51060f0 SH |
1441 | |
1442 | ret = rdma_listen(id, id_priv->backlog); | |
1443 | if (ret) | |
d02d1f53 | 1444 | printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, " |
468f2239 | 1445 | "listening on device %s\n", ret, cma_dev->device->name); |
e51060f0 SH |
1446 | } |
1447 | ||
1448 | static void cma_listen_on_all(struct rdma_id_private *id_priv) | |
1449 | { | |
1450 | struct cma_device *cma_dev; | |
1451 | ||
1452 | mutex_lock(&lock); | |
1453 | list_add_tail(&id_priv->list, &listen_any_list); | |
1454 | list_for_each_entry(cma_dev, &dev_list, list) | |
1455 | cma_listen_on_dev(id_priv, cma_dev); | |
1456 | mutex_unlock(&lock); | |
1457 | } | |
1458 | ||
1459 | static int cma_bind_any(struct rdma_cm_id *id, sa_family_t af) | |
1460 | { | |
1461 | struct sockaddr_in addr_in; | |
1462 | ||
1463 | memset(&addr_in, 0, sizeof addr_in); | |
1464 | addr_in.sin_family = af; | |
1465 | return rdma_bind_addr(id, (struct sockaddr *) &addr_in); | |
1466 | } | |
1467 | ||
1468 | int rdma_listen(struct rdma_cm_id *id, int backlog) | |
1469 | { | |
1470 | struct rdma_id_private *id_priv; | |
1471 | int ret; | |
1472 | ||
1473 | id_priv = container_of(id, struct rdma_id_private, id); | |
1474 | if (id_priv->state == CMA_IDLE) { | |
1475 | ret = cma_bind_any(id, AF_INET); | |
1476 | if (ret) | |
1477 | return ret; | |
1478 | } | |
1479 | ||
1480 | if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_LISTEN)) | |
1481 | return -EINVAL; | |
1482 | ||
1483 | id_priv->backlog = backlog; | |
1484 | if (id->device) { | |
07ebafba TT |
1485 | switch (rdma_node_get_transport(id->device->node_type)) { |
1486 | case RDMA_TRANSPORT_IB: | |
e51060f0 SH |
1487 | ret = cma_ib_listen(id_priv); |
1488 | if (ret) | |
1489 | goto err; | |
1490 | break; | |
07ebafba TT |
1491 | case RDMA_TRANSPORT_IWARP: |
1492 | ret = cma_iw_listen(id_priv, backlog); | |
1493 | if (ret) | |
1494 | goto err; | |
1495 | break; | |
e51060f0 SH |
1496 | default: |
1497 | ret = -ENOSYS; | |
1498 | goto err; | |
1499 | } | |
1500 | } else | |
1501 | cma_listen_on_all(id_priv); | |
1502 | ||
1503 | return 0; | |
1504 | err: | |
1505 | id_priv->backlog = 0; | |
1506 | cma_comp_exch(id_priv, CMA_LISTEN, CMA_ADDR_BOUND); | |
1507 | return ret; | |
1508 | } | |
1509 | EXPORT_SYMBOL(rdma_listen); | |
1510 | ||
a81c994d SH |
1511 | void rdma_set_service_type(struct rdma_cm_id *id, int tos) |
1512 | { | |
1513 | struct rdma_id_private *id_priv; | |
1514 | ||
1515 | id_priv = container_of(id, struct rdma_id_private, id); | |
1516 | id_priv->tos = (u8) tos; | |
1517 | } | |
1518 | EXPORT_SYMBOL(rdma_set_service_type); | |
1519 | ||
e51060f0 SH |
1520 | static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec, |
1521 | void *context) | |
1522 | { | |
1523 | struct cma_work *work = context; | |
1524 | struct rdma_route *route; | |
1525 | ||
1526 | route = &work->id->id.route; | |
1527 | ||
1528 | if (!status) { | |
1529 | route->num_paths = 1; | |
1530 | *route->path_rec = *path_rec; | |
1531 | } else { | |
1532 | work->old_state = CMA_ROUTE_QUERY; | |
1533 | work->new_state = CMA_ADDR_RESOLVED; | |
1534 | work->event.event = RDMA_CM_EVENT_ROUTE_ERROR; | |
8f0472d3 | 1535 | work->event.status = status; |
e51060f0 SH |
1536 | } |
1537 | ||
1538 | queue_work(cma_wq, &work->work); | |
1539 | } | |
1540 | ||
1541 | static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms, | |
1542 | struct cma_work *work) | |
1543 | { | |
a81c994d | 1544 | struct rdma_addr *addr = &id_priv->id.route.addr; |
e51060f0 | 1545 | struct ib_sa_path_rec path_rec; |
a81c994d SH |
1546 | ib_sa_comp_mask comp_mask; |
1547 | struct sockaddr_in6 *sin6; | |
e51060f0 SH |
1548 | |
1549 | memset(&path_rec, 0, sizeof path_rec); | |
a81c994d SH |
1550 | ib_addr_get_sgid(&addr->dev_addr, &path_rec.sgid); |
1551 | ib_addr_get_dgid(&addr->dev_addr, &path_rec.dgid); | |
1552 | path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(&addr->dev_addr)); | |
e51060f0 | 1553 | path_rec.numb_path = 1; |
962063e6 | 1554 | path_rec.reversible = 1; |
a81c994d SH |
1555 | path_rec.service_id = cma_get_service_id(id_priv->id.ps, &addr->dst_addr); |
1556 | ||
1557 | comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID | | |
1558 | IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH | | |
1559 | IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID; | |
1560 | ||
1561 | if (addr->src_addr.sa_family == AF_INET) { | |
1562 | path_rec.qos_class = cpu_to_be16((u16) id_priv->tos); | |
1563 | comp_mask |= IB_SA_PATH_REC_QOS_CLASS; | |
1564 | } else { | |
1565 | sin6 = (struct sockaddr_in6 *) &addr->src_addr; | |
1566 | path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20); | |
1567 | comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS; | |
1568 | } | |
e51060f0 | 1569 | |
c1a0b23b | 1570 | id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device, |
a81c994d SH |
1571 | id_priv->id.port_num, &path_rec, |
1572 | comp_mask, timeout_ms, | |
1573 | GFP_KERNEL, cma_query_handler, | |
1574 | work, &id_priv->query); | |
e51060f0 SH |
1575 | |
1576 | return (id_priv->query_id < 0) ? id_priv->query_id : 0; | |
1577 | } | |
1578 | ||
c4028958 | 1579 | static void cma_work_handler(struct work_struct *_work) |
e51060f0 | 1580 | { |
c4028958 | 1581 | struct cma_work *work = container_of(_work, struct cma_work, work); |
e51060f0 SH |
1582 | struct rdma_id_private *id_priv = work->id; |
1583 | int destroy = 0; | |
1584 | ||
de910bd9 | 1585 | mutex_lock(&id_priv->handler_mutex); |
e51060f0 SH |
1586 | if (!cma_comp_exch(id_priv, work->old_state, work->new_state)) |
1587 | goto out; | |
1588 | ||
1589 | if (id_priv->id.event_handler(&id_priv->id, &work->event)) { | |
1590 | cma_exch(id_priv, CMA_DESTROYING); | |
1591 | destroy = 1; | |
1592 | } | |
1593 | out: | |
de910bd9 | 1594 | mutex_unlock(&id_priv->handler_mutex); |
e51060f0 SH |
1595 | cma_deref_id(id_priv); |
1596 | if (destroy) | |
1597 | rdma_destroy_id(&id_priv->id); | |
1598 | kfree(work); | |
1599 | } | |
1600 | ||
1601 | static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms) | |
1602 | { | |
1603 | struct rdma_route *route = &id_priv->id.route; | |
1604 | struct cma_work *work; | |
1605 | int ret; | |
1606 | ||
1607 | work = kzalloc(sizeof *work, GFP_KERNEL); | |
1608 | if (!work) | |
1609 | return -ENOMEM; | |
1610 | ||
1611 | work->id = id_priv; | |
c4028958 | 1612 | INIT_WORK(&work->work, cma_work_handler); |
e51060f0 SH |
1613 | work->old_state = CMA_ROUTE_QUERY; |
1614 | work->new_state = CMA_ROUTE_RESOLVED; | |
1615 | work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; | |
1616 | ||
1617 | route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL); | |
1618 | if (!route->path_rec) { | |
1619 | ret = -ENOMEM; | |
1620 | goto err1; | |
1621 | } | |
1622 | ||
1623 | ret = cma_query_ib_route(id_priv, timeout_ms, work); | |
1624 | if (ret) | |
1625 | goto err2; | |
1626 | ||
1627 | return 0; | |
1628 | err2: | |
1629 | kfree(route->path_rec); | |
1630 | route->path_rec = NULL; | |
1631 | err1: | |
1632 | kfree(work); | |
1633 | return ret; | |
1634 | } | |
1635 | ||
1636 | int rdma_set_ib_paths(struct rdma_cm_id *id, | |
1637 | struct ib_sa_path_rec *path_rec, int num_paths) | |
1638 | { | |
1639 | struct rdma_id_private *id_priv; | |
1640 | int ret; | |
1641 | ||
1642 | id_priv = container_of(id, struct rdma_id_private, id); | |
1643 | if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_RESOLVED)) | |
1644 | return -EINVAL; | |
1645 | ||
1646 | id->route.path_rec = kmalloc(sizeof *path_rec * num_paths, GFP_KERNEL); | |
1647 | if (!id->route.path_rec) { | |
1648 | ret = -ENOMEM; | |
1649 | goto err; | |
1650 | } | |
1651 | ||
1652 | memcpy(id->route.path_rec, path_rec, sizeof *path_rec * num_paths); | |
1653 | return 0; | |
1654 | err: | |
1655 | cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_ADDR_RESOLVED); | |
1656 | return ret; | |
1657 | } | |
1658 | EXPORT_SYMBOL(rdma_set_ib_paths); | |
1659 | ||
07ebafba TT |
1660 | static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms) |
1661 | { | |
1662 | struct cma_work *work; | |
1663 | ||
1664 | work = kzalloc(sizeof *work, GFP_KERNEL); | |
1665 | if (!work) | |
1666 | return -ENOMEM; | |
1667 | ||
1668 | work->id = id_priv; | |
c4028958 | 1669 | INIT_WORK(&work->work, cma_work_handler); |
07ebafba TT |
1670 | work->old_state = CMA_ROUTE_QUERY; |
1671 | work->new_state = CMA_ROUTE_RESOLVED; | |
1672 | work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; | |
1673 | queue_work(cma_wq, &work->work); | |
1674 | return 0; | |
1675 | } | |
1676 | ||
e51060f0 SH |
1677 | int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms) |
1678 | { | |
1679 | struct rdma_id_private *id_priv; | |
1680 | int ret; | |
1681 | ||
1682 | id_priv = container_of(id, struct rdma_id_private, id); | |
1683 | if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_QUERY)) | |
1684 | return -EINVAL; | |
1685 | ||
1686 | atomic_inc(&id_priv->refcount); | |
07ebafba TT |
1687 | switch (rdma_node_get_transport(id->device->node_type)) { |
1688 | case RDMA_TRANSPORT_IB: | |
e51060f0 SH |
1689 | ret = cma_resolve_ib_route(id_priv, timeout_ms); |
1690 | break; | |
07ebafba TT |
1691 | case RDMA_TRANSPORT_IWARP: |
1692 | ret = cma_resolve_iw_route(id_priv, timeout_ms); | |
1693 | break; | |
e51060f0 SH |
1694 | default: |
1695 | ret = -ENOSYS; | |
1696 | break; | |
1697 | } | |
1698 | if (ret) | |
1699 | goto err; | |
1700 | ||
1701 | return 0; | |
1702 | err: | |
1703 | cma_comp_exch(id_priv, CMA_ROUTE_QUERY, CMA_ADDR_RESOLVED); | |
1704 | cma_deref_id(id_priv); | |
1705 | return ret; | |
1706 | } | |
1707 | EXPORT_SYMBOL(rdma_resolve_route); | |
1708 | ||
1709 | static int cma_bind_loopback(struct rdma_id_private *id_priv) | |
1710 | { | |
1711 | struct cma_device *cma_dev; | |
1712 | struct ib_port_attr port_attr; | |
f0ee3404 | 1713 | union ib_gid gid; |
e51060f0 SH |
1714 | u16 pkey; |
1715 | int ret; | |
1716 | u8 p; | |
1717 | ||
1718 | mutex_lock(&lock); | |
e82153b5 KK |
1719 | if (list_empty(&dev_list)) { |
1720 | ret = -ENODEV; | |
1721 | goto out; | |
1722 | } | |
e51060f0 SH |
1723 | list_for_each_entry(cma_dev, &dev_list, list) |
1724 | for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p) | |
e82153b5 | 1725 | if (!ib_query_port(cma_dev->device, p, &port_attr) && |
e51060f0 SH |
1726 | port_attr.state == IB_PORT_ACTIVE) |
1727 | goto port_found; | |
1728 | ||
e82153b5 KK |
1729 | p = 1; |
1730 | cma_dev = list_entry(dev_list.next, struct cma_device, list); | |
e51060f0 SH |
1731 | |
1732 | port_found: | |
f0ee3404 | 1733 | ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid); |
e51060f0 SH |
1734 | if (ret) |
1735 | goto out; | |
1736 | ||
1737 | ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey); | |
1738 | if (ret) | |
1739 | goto out; | |
1740 | ||
f0ee3404 | 1741 | ib_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid); |
e51060f0 SH |
1742 | ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey); |
1743 | id_priv->id.port_num = p; | |
1744 | cma_attach_to_dev(id_priv, cma_dev); | |
1745 | out: | |
1746 | mutex_unlock(&lock); | |
1747 | return ret; | |
1748 | } | |
1749 | ||
1750 | static void addr_handler(int status, struct sockaddr *src_addr, | |
1751 | struct rdma_dev_addr *dev_addr, void *context) | |
1752 | { | |
1753 | struct rdma_id_private *id_priv = context; | |
a1b1b61f | 1754 | struct rdma_cm_event event; |
e51060f0 | 1755 | |
a1b1b61f | 1756 | memset(&event, 0, sizeof event); |
de910bd9 | 1757 | mutex_lock(&id_priv->handler_mutex); |
61a73c70 SH |
1758 | |
1759 | /* | |
1760 | * Grab mutex to block rdma_destroy_id() from removing the device while | |
1761 | * we're trying to acquire it. | |
1762 | */ | |
1763 | mutex_lock(&lock); | |
1764 | if (!cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_RESOLVED)) { | |
1765 | mutex_unlock(&lock); | |
1766 | goto out; | |
1767 | } | |
1768 | ||
1769 | if (!status && !id_priv->cma_dev) | |
e51060f0 | 1770 | status = cma_acquire_dev(id_priv); |
61a73c70 | 1771 | mutex_unlock(&lock); |
e51060f0 SH |
1772 | |
1773 | if (status) { | |
61a73c70 | 1774 | if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ADDR_BOUND)) |
e51060f0 | 1775 | goto out; |
a1b1b61f SH |
1776 | event.event = RDMA_CM_EVENT_ADDR_ERROR; |
1777 | event.status = status; | |
e51060f0 | 1778 | } else { |
e51060f0 SH |
1779 | memcpy(&id_priv->id.route.addr.src_addr, src_addr, |
1780 | ip_addr_size(src_addr)); | |
a1b1b61f | 1781 | event.event = RDMA_CM_EVENT_ADDR_RESOLVED; |
e51060f0 SH |
1782 | } |
1783 | ||
a1b1b61f | 1784 | if (id_priv->id.event_handler(&id_priv->id, &event)) { |
e51060f0 | 1785 | cma_exch(id_priv, CMA_DESTROYING); |
de910bd9 | 1786 | mutex_unlock(&id_priv->handler_mutex); |
e51060f0 SH |
1787 | cma_deref_id(id_priv); |
1788 | rdma_destroy_id(&id_priv->id); | |
1789 | return; | |
1790 | } | |
1791 | out: | |
de910bd9 | 1792 | mutex_unlock(&id_priv->handler_mutex); |
e51060f0 SH |
1793 | cma_deref_id(id_priv); |
1794 | } | |
1795 | ||
1796 | static int cma_resolve_loopback(struct rdma_id_private *id_priv) | |
1797 | { | |
1798 | struct cma_work *work; | |
1799 | struct sockaddr_in *src_in, *dst_in; | |
f0ee3404 | 1800 | union ib_gid gid; |
e51060f0 SH |
1801 | int ret; |
1802 | ||
1803 | work = kzalloc(sizeof *work, GFP_KERNEL); | |
1804 | if (!work) | |
1805 | return -ENOMEM; | |
1806 | ||
1807 | if (!id_priv->cma_dev) { | |
1808 | ret = cma_bind_loopback(id_priv); | |
1809 | if (ret) | |
1810 | goto err; | |
1811 | } | |
1812 | ||
f0ee3404 MT |
1813 | ib_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid); |
1814 | ib_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid); | |
e51060f0 SH |
1815 | |
1816 | if (cma_zero_addr(&id_priv->id.route.addr.src_addr)) { | |
1817 | src_in = (struct sockaddr_in *)&id_priv->id.route.addr.src_addr; | |
1818 | dst_in = (struct sockaddr_in *)&id_priv->id.route.addr.dst_addr; | |
1819 | src_in->sin_family = dst_in->sin_family; | |
1820 | src_in->sin_addr.s_addr = dst_in->sin_addr.s_addr; | |
1821 | } | |
1822 | ||
1823 | work->id = id_priv; | |
c4028958 | 1824 | INIT_WORK(&work->work, cma_work_handler); |
e51060f0 SH |
1825 | work->old_state = CMA_ADDR_QUERY; |
1826 | work->new_state = CMA_ADDR_RESOLVED; | |
1827 | work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED; | |
1828 | queue_work(cma_wq, &work->work); | |
1829 | return 0; | |
1830 | err: | |
1831 | kfree(work); | |
1832 | return ret; | |
1833 | } | |
1834 | ||
1835 | static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, | |
1836 | struct sockaddr *dst_addr) | |
1837 | { | |
1838 | if (src_addr && src_addr->sa_family) | |
1839 | return rdma_bind_addr(id, src_addr); | |
1840 | else | |
1841 | return cma_bind_any(id, dst_addr->sa_family); | |
1842 | } | |
1843 | ||
1844 | int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, | |
1845 | struct sockaddr *dst_addr, int timeout_ms) | |
1846 | { | |
1847 | struct rdma_id_private *id_priv; | |
1848 | int ret; | |
1849 | ||
1850 | id_priv = container_of(id, struct rdma_id_private, id); | |
1851 | if (id_priv->state == CMA_IDLE) { | |
1852 | ret = cma_bind_addr(id, src_addr, dst_addr); | |
1853 | if (ret) | |
1854 | return ret; | |
1855 | } | |
1856 | ||
1857 | if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_ADDR_QUERY)) | |
1858 | return -EINVAL; | |
1859 | ||
1860 | atomic_inc(&id_priv->refcount); | |
1861 | memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr)); | |
1862 | if (cma_any_addr(dst_addr)) | |
1863 | ret = cma_resolve_loopback(id_priv); | |
1864 | else | |
7a118df3 SH |
1865 | ret = rdma_resolve_ip(&addr_client, &id->route.addr.src_addr, |
1866 | dst_addr, &id->route.addr.dev_addr, | |
e51060f0 SH |
1867 | timeout_ms, addr_handler, id_priv); |
1868 | if (ret) | |
1869 | goto err; | |
1870 | ||
1871 | return 0; | |
1872 | err: | |
1873 | cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_BOUND); | |
1874 | cma_deref_id(id_priv); | |
1875 | return ret; | |
1876 | } | |
1877 | EXPORT_SYMBOL(rdma_resolve_addr); | |
1878 | ||
1879 | static void cma_bind_port(struct rdma_bind_list *bind_list, | |
1880 | struct rdma_id_private *id_priv) | |
1881 | { | |
1882 | struct sockaddr_in *sin; | |
1883 | ||
1884 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; | |
1885 | sin->sin_port = htons(bind_list->port); | |
1886 | id_priv->bind_list = bind_list; | |
1887 | hlist_add_head(&id_priv->node, &bind_list->owners); | |
1888 | } | |
1889 | ||
1890 | static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv, | |
1891 | unsigned short snum) | |
1892 | { | |
1893 | struct rdma_bind_list *bind_list; | |
aedec080 | 1894 | int port, ret; |
e51060f0 | 1895 | |
cb164b8c | 1896 | bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL); |
e51060f0 SH |
1897 | if (!bind_list) |
1898 | return -ENOMEM; | |
1899 | ||
aedec080 SH |
1900 | do { |
1901 | ret = idr_get_new_above(ps, bind_list, snum, &port); | |
1902 | } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL)); | |
1903 | ||
1904 | if (ret) | |
1905 | goto err1; | |
1906 | ||
1907 | if (port != snum) { | |
1908 | ret = -EADDRNOTAVAIL; | |
1909 | goto err2; | |
1910 | } | |
1911 | ||
1912 | bind_list->ps = ps; | |
1913 | bind_list->port = (unsigned short) port; | |
1914 | cma_bind_port(bind_list, id_priv); | |
1915 | return 0; | |
1916 | err2: | |
1917 | idr_remove(ps, port); | |
1918 | err1: | |
1919 | kfree(bind_list); | |
1920 | return ret; | |
1921 | } | |
e51060f0 | 1922 | |
aedec080 SH |
1923 | static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv) |
1924 | { | |
1925 | struct rdma_bind_list *bind_list; | |
227b60f5 | 1926 | int port, ret, low, high; |
aedec080 SH |
1927 | |
1928 | bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL); | |
1929 | if (!bind_list) | |
1930 | return -ENOMEM; | |
1931 | ||
1932 | retry: | |
227b60f5 | 1933 | /* FIXME: add proper port randomization per like inet_csk_get_port */ |
e51060f0 | 1934 | do { |
aedec080 | 1935 | ret = idr_get_new_above(ps, bind_list, next_port, &port); |
e51060f0 SH |
1936 | } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL)); |
1937 | ||
1938 | if (ret) | |
aedec080 | 1939 | goto err1; |
e51060f0 | 1940 | |
227b60f5 SH |
1941 | inet_get_local_port_range(&low, &high); |
1942 | if (port > high) { | |
1943 | if (next_port != low) { | |
aedec080 | 1944 | idr_remove(ps, port); |
227b60f5 | 1945 | next_port = low; |
aedec080 SH |
1946 | goto retry; |
1947 | } | |
e51060f0 | 1948 | ret = -EADDRNOTAVAIL; |
aedec080 | 1949 | goto err2; |
e51060f0 SH |
1950 | } |
1951 | ||
227b60f5 SH |
1952 | if (port == high) |
1953 | next_port = low; | |
aedec080 SH |
1954 | else |
1955 | next_port = port + 1; | |
1956 | ||
e51060f0 SH |
1957 | bind_list->ps = ps; |
1958 | bind_list->port = (unsigned short) port; | |
1959 | cma_bind_port(bind_list, id_priv); | |
1960 | return 0; | |
aedec080 SH |
1961 | err2: |
1962 | idr_remove(ps, port); | |
1963 | err1: | |
e51060f0 SH |
1964 | kfree(bind_list); |
1965 | return ret; | |
1966 | } | |
1967 | ||
1968 | static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv) | |
1969 | { | |
1970 | struct rdma_id_private *cur_id; | |
1971 | struct sockaddr_in *sin, *cur_sin; | |
1972 | struct rdma_bind_list *bind_list; | |
1973 | struct hlist_node *node; | |
1974 | unsigned short snum; | |
1975 | ||
1976 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; | |
1977 | snum = ntohs(sin->sin_port); | |
1978 | if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) | |
1979 | return -EACCES; | |
1980 | ||
1981 | bind_list = idr_find(ps, snum); | |
1982 | if (!bind_list) | |
1983 | return cma_alloc_port(ps, id_priv, snum); | |
1984 | ||
1985 | /* | |
1986 | * We don't support binding to any address if anyone is bound to | |
1987 | * a specific address on the same port. | |
1988 | */ | |
1989 | if (cma_any_addr(&id_priv->id.route.addr.src_addr)) | |
1990 | return -EADDRNOTAVAIL; | |
1991 | ||
1992 | hlist_for_each_entry(cur_id, node, &bind_list->owners, node) { | |
1993 | if (cma_any_addr(&cur_id->id.route.addr.src_addr)) | |
1994 | return -EADDRNOTAVAIL; | |
3cd96564 | 1995 | |
e51060f0 SH |
1996 | cur_sin = (struct sockaddr_in *) &cur_id->id.route.addr.src_addr; |
1997 | if (sin->sin_addr.s_addr == cur_sin->sin_addr.s_addr) | |
1998 | return -EADDRINUSE; | |
1999 | } | |
2000 | ||
2001 | cma_bind_port(bind_list, id_priv); | |
2002 | return 0; | |
2003 | } | |
2004 | ||
2005 | static int cma_get_port(struct rdma_id_private *id_priv) | |
2006 | { | |
2007 | struct idr *ps; | |
2008 | int ret; | |
2009 | ||
2010 | switch (id_priv->id.ps) { | |
2011 | case RDMA_PS_SDP: | |
2012 | ps = &sdp_ps; | |
2013 | break; | |
2014 | case RDMA_PS_TCP: | |
2015 | ps = &tcp_ps; | |
2016 | break; | |
628e5f6d SH |
2017 | case RDMA_PS_UDP: |
2018 | ps = &udp_ps; | |
2019 | break; | |
c8f6a362 SH |
2020 | case RDMA_PS_IPOIB: |
2021 | ps = &ipoib_ps; | |
2022 | break; | |
e51060f0 SH |
2023 | default: |
2024 | return -EPROTONOSUPPORT; | |
2025 | } | |
2026 | ||
2027 | mutex_lock(&lock); | |
2028 | if (cma_any_port(&id_priv->id.route.addr.src_addr)) | |
aedec080 | 2029 | ret = cma_alloc_any_port(ps, id_priv); |
e51060f0 SH |
2030 | else |
2031 | ret = cma_use_port(ps, id_priv); | |
2032 | mutex_unlock(&lock); | |
2033 | ||
2034 | return ret; | |
2035 | } | |
2036 | ||
2037 | int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr) | |
2038 | { | |
2039 | struct rdma_id_private *id_priv; | |
2040 | int ret; | |
2041 | ||
2042 | if (addr->sa_family != AF_INET) | |
2043 | return -EAFNOSUPPORT; | |
2044 | ||
2045 | id_priv = container_of(id, struct rdma_id_private, id); | |
2046 | if (!cma_comp_exch(id_priv, CMA_IDLE, CMA_ADDR_BOUND)) | |
2047 | return -EINVAL; | |
2048 | ||
2049 | if (!cma_any_addr(addr)) { | |
2050 | ret = rdma_translate_ip(addr, &id->route.addr.dev_addr); | |
e51060f0 | 2051 | if (ret) |
255d0c14 KK |
2052 | goto err1; |
2053 | ||
2054 | mutex_lock(&lock); | |
2055 | ret = cma_acquire_dev(id_priv); | |
2056 | mutex_unlock(&lock); | |
2057 | if (ret) | |
2058 | goto err1; | |
e51060f0 SH |
2059 | } |
2060 | ||
2061 | memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr)); | |
2062 | ret = cma_get_port(id_priv); | |
2063 | if (ret) | |
255d0c14 | 2064 | goto err2; |
e51060f0 SH |
2065 | |
2066 | return 0; | |
255d0c14 KK |
2067 | err2: |
2068 | if (!cma_any_addr(addr)) { | |
2069 | mutex_lock(&lock); | |
2070 | cma_detach_from_dev(id_priv); | |
2071 | mutex_unlock(&lock); | |
2072 | } | |
2073 | err1: | |
e51060f0 SH |
2074 | cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_IDLE); |
2075 | return ret; | |
2076 | } | |
2077 | EXPORT_SYMBOL(rdma_bind_addr); | |
2078 | ||
2079 | static int cma_format_hdr(void *hdr, enum rdma_port_space ps, | |
2080 | struct rdma_route *route) | |
2081 | { | |
2082 | struct sockaddr_in *src4, *dst4; | |
2083 | struct cma_hdr *cma_hdr; | |
2084 | struct sdp_hh *sdp_hdr; | |
2085 | ||
2086 | src4 = (struct sockaddr_in *) &route->addr.src_addr; | |
2087 | dst4 = (struct sockaddr_in *) &route->addr.dst_addr; | |
2088 | ||
2089 | switch (ps) { | |
2090 | case RDMA_PS_SDP: | |
2091 | sdp_hdr = hdr; | |
2092 | if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION) | |
2093 | return -EINVAL; | |
2094 | sdp_set_ip_ver(sdp_hdr, 4); | |
2095 | sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; | |
2096 | sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; | |
2097 | sdp_hdr->port = src4->sin_port; | |
2098 | break; | |
2099 | default: | |
2100 | cma_hdr = hdr; | |
2101 | cma_hdr->cma_version = CMA_VERSION; | |
2102 | cma_set_ip_ver(cma_hdr, 4); | |
2103 | cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; | |
2104 | cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; | |
2105 | cma_hdr->port = src4->sin_port; | |
2106 | break; | |
2107 | } | |
2108 | return 0; | |
2109 | } | |
2110 | ||
628e5f6d SH |
2111 | static int cma_sidr_rep_handler(struct ib_cm_id *cm_id, |
2112 | struct ib_cm_event *ib_event) | |
2113 | { | |
2114 | struct rdma_id_private *id_priv = cm_id->context; | |
2115 | struct rdma_cm_event event; | |
2116 | struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd; | |
2117 | int ret = 0; | |
2118 | ||
de910bd9 | 2119 | if (cma_disable_callback(id_priv, CMA_CONNECT)) |
8aa08602 | 2120 | return 0; |
628e5f6d | 2121 | |
8aa08602 | 2122 | memset(&event, 0, sizeof event); |
628e5f6d SH |
2123 | switch (ib_event->event) { |
2124 | case IB_CM_SIDR_REQ_ERROR: | |
2125 | event.event = RDMA_CM_EVENT_UNREACHABLE; | |
2126 | event.status = -ETIMEDOUT; | |
2127 | break; | |
2128 | case IB_CM_SIDR_REP_RECEIVED: | |
2129 | event.param.ud.private_data = ib_event->private_data; | |
2130 | event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; | |
2131 | if (rep->status != IB_SIDR_SUCCESS) { | |
2132 | event.event = RDMA_CM_EVENT_UNREACHABLE; | |
2133 | event.status = ib_event->param.sidr_rep_rcvd.status; | |
2134 | break; | |
2135 | } | |
c8f6a362 | 2136 | if (id_priv->qkey != rep->qkey) { |
628e5f6d SH |
2137 | event.event = RDMA_CM_EVENT_UNREACHABLE; |
2138 | event.status = -EINVAL; | |
2139 | break; | |
2140 | } | |
2141 | ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num, | |
2142 | id_priv->id.route.path_rec, | |
2143 | &event.param.ud.ah_attr); | |
2144 | event.param.ud.qp_num = rep->qpn; | |
2145 | event.param.ud.qkey = rep->qkey; | |
2146 | event.event = RDMA_CM_EVENT_ESTABLISHED; | |
2147 | event.status = 0; | |
2148 | break; | |
2149 | default: | |
468f2239 | 2150 | printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n", |
628e5f6d SH |
2151 | ib_event->event); |
2152 | goto out; | |
2153 | } | |
2154 | ||
2155 | ret = id_priv->id.event_handler(&id_priv->id, &event); | |
2156 | if (ret) { | |
2157 | /* Destroy the CM ID by returning a non-zero value. */ | |
2158 | id_priv->cm_id.ib = NULL; | |
2159 | cma_exch(id_priv, CMA_DESTROYING); | |
de910bd9 | 2160 | mutex_unlock(&id_priv->handler_mutex); |
628e5f6d SH |
2161 | rdma_destroy_id(&id_priv->id); |
2162 | return ret; | |
2163 | } | |
2164 | out: | |
de910bd9 | 2165 | mutex_unlock(&id_priv->handler_mutex); |
628e5f6d SH |
2166 | return ret; |
2167 | } | |
2168 | ||
2169 | static int cma_resolve_ib_udp(struct rdma_id_private *id_priv, | |
2170 | struct rdma_conn_param *conn_param) | |
2171 | { | |
2172 | struct ib_cm_sidr_req_param req; | |
2173 | struct rdma_route *route; | |
2174 | int ret; | |
2175 | ||
2176 | req.private_data_len = sizeof(struct cma_hdr) + | |
2177 | conn_param->private_data_len; | |
2178 | req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC); | |
2179 | if (!req.private_data) | |
2180 | return -ENOMEM; | |
2181 | ||
2182 | if (conn_param->private_data && conn_param->private_data_len) | |
2183 | memcpy((void *) req.private_data + sizeof(struct cma_hdr), | |
2184 | conn_param->private_data, conn_param->private_data_len); | |
2185 | ||
2186 | route = &id_priv->id.route; | |
2187 | ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route); | |
2188 | if (ret) | |
2189 | goto out; | |
2190 | ||
2191 | id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, | |
2192 | cma_sidr_rep_handler, id_priv); | |
2193 | if (IS_ERR(id_priv->cm_id.ib)) { | |
2194 | ret = PTR_ERR(id_priv->cm_id.ib); | |
2195 | goto out; | |
2196 | } | |
2197 | ||
2198 | req.path = route->path_rec; | |
2199 | req.service_id = cma_get_service_id(id_priv->id.ps, | |
2200 | &route->addr.dst_addr); | |
2201 | req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8); | |
2202 | req.max_cm_retries = CMA_MAX_CM_RETRIES; | |
2203 | ||
2204 | ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req); | |
2205 | if (ret) { | |
2206 | ib_destroy_cm_id(id_priv->cm_id.ib); | |
2207 | id_priv->cm_id.ib = NULL; | |
2208 | } | |
2209 | out: | |
2210 | kfree(req.private_data); | |
2211 | return ret; | |
2212 | } | |
2213 | ||
e51060f0 SH |
2214 | static int cma_connect_ib(struct rdma_id_private *id_priv, |
2215 | struct rdma_conn_param *conn_param) | |
2216 | { | |
2217 | struct ib_cm_req_param req; | |
2218 | struct rdma_route *route; | |
2219 | void *private_data; | |
2220 | int offset, ret; | |
2221 | ||
2222 | memset(&req, 0, sizeof req); | |
2223 | offset = cma_user_data_offset(id_priv->id.ps); | |
2224 | req.private_data_len = offset + conn_param->private_data_len; | |
2225 | private_data = kzalloc(req.private_data_len, GFP_ATOMIC); | |
2226 | if (!private_data) | |
2227 | return -ENOMEM; | |
2228 | ||
2229 | if (conn_param->private_data && conn_param->private_data_len) | |
2230 | memcpy(private_data + offset, conn_param->private_data, | |
2231 | conn_param->private_data_len); | |
2232 | ||
2233 | id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_ib_handler, | |
2234 | id_priv); | |
2235 | if (IS_ERR(id_priv->cm_id.ib)) { | |
2236 | ret = PTR_ERR(id_priv->cm_id.ib); | |
2237 | goto out; | |
2238 | } | |
2239 | ||
2240 | route = &id_priv->id.route; | |
2241 | ret = cma_format_hdr(private_data, id_priv->id.ps, route); | |
2242 | if (ret) | |
2243 | goto out; | |
2244 | req.private_data = private_data; | |
2245 | ||
2246 | req.primary_path = &route->path_rec[0]; | |
2247 | if (route->num_paths == 2) | |
2248 | req.alternate_path = &route->path_rec[1]; | |
2249 | ||
2250 | req.service_id = cma_get_service_id(id_priv->id.ps, | |
2251 | &route->addr.dst_addr); | |
2252 | req.qp_num = id_priv->qp_num; | |
9b2e9c0c | 2253 | req.qp_type = IB_QPT_RC; |
e51060f0 SH |
2254 | req.starting_psn = id_priv->seq_num; |
2255 | req.responder_resources = conn_param->responder_resources; | |
2256 | req.initiator_depth = conn_param->initiator_depth; | |
2257 | req.flow_control = conn_param->flow_control; | |
2258 | req.retry_count = conn_param->retry_count; | |
2259 | req.rnr_retry_count = conn_param->rnr_retry_count; | |
2260 | req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; | |
2261 | req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; | |
2262 | req.max_cm_retries = CMA_MAX_CM_RETRIES; | |
2263 | req.srq = id_priv->srq ? 1 : 0; | |
2264 | ||
2265 | ret = ib_send_cm_req(id_priv->cm_id.ib, &req); | |
2266 | out: | |
675a027c KK |
2267 | if (ret && !IS_ERR(id_priv->cm_id.ib)) { |
2268 | ib_destroy_cm_id(id_priv->cm_id.ib); | |
2269 | id_priv->cm_id.ib = NULL; | |
2270 | } | |
2271 | ||
e51060f0 SH |
2272 | kfree(private_data); |
2273 | return ret; | |
2274 | } | |
2275 | ||
07ebafba TT |
2276 | static int cma_connect_iw(struct rdma_id_private *id_priv, |
2277 | struct rdma_conn_param *conn_param) | |
2278 | { | |
2279 | struct iw_cm_id *cm_id; | |
2280 | struct sockaddr_in* sin; | |
2281 | int ret; | |
2282 | struct iw_cm_conn_param iw_param; | |
2283 | ||
2284 | cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv); | |
2285 | if (IS_ERR(cm_id)) { | |
2286 | ret = PTR_ERR(cm_id); | |
2287 | goto out; | |
2288 | } | |
2289 | ||
2290 | id_priv->cm_id.iw = cm_id; | |
2291 | ||
2292 | sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr; | |
2293 | cm_id->local_addr = *sin; | |
2294 | ||
2295 | sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr; | |
2296 | cm_id->remote_addr = *sin; | |
2297 | ||
5851bb89 | 2298 | ret = cma_modify_qp_rtr(id_priv, conn_param); |
675a027c KK |
2299 | if (ret) |
2300 | goto out; | |
07ebafba TT |
2301 | |
2302 | iw_param.ord = conn_param->initiator_depth; | |
2303 | iw_param.ird = conn_param->responder_resources; | |
2304 | iw_param.private_data = conn_param->private_data; | |
2305 | iw_param.private_data_len = conn_param->private_data_len; | |
2306 | if (id_priv->id.qp) | |
2307 | iw_param.qpn = id_priv->qp_num; | |
2308 | else | |
2309 | iw_param.qpn = conn_param->qp_num; | |
2310 | ret = iw_cm_connect(cm_id, &iw_param); | |
2311 | out: | |
675a027c KK |
2312 | if (ret && !IS_ERR(cm_id)) { |
2313 | iw_destroy_cm_id(cm_id); | |
2314 | id_priv->cm_id.iw = NULL; | |
2315 | } | |
07ebafba TT |
2316 | return ret; |
2317 | } | |
2318 | ||
e51060f0 SH |
2319 | int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) |
2320 | { | |
2321 | struct rdma_id_private *id_priv; | |
2322 | int ret; | |
2323 | ||
2324 | id_priv = container_of(id, struct rdma_id_private, id); | |
2325 | if (!cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_CONNECT)) | |
2326 | return -EINVAL; | |
2327 | ||
2328 | if (!id->qp) { | |
2329 | id_priv->qp_num = conn_param->qp_num; | |
e51060f0 SH |
2330 | id_priv->srq = conn_param->srq; |
2331 | } | |
2332 | ||
07ebafba TT |
2333 | switch (rdma_node_get_transport(id->device->node_type)) { |
2334 | case RDMA_TRANSPORT_IB: | |
c8f6a362 | 2335 | if (cma_is_ud_ps(id->ps)) |
628e5f6d SH |
2336 | ret = cma_resolve_ib_udp(id_priv, conn_param); |
2337 | else | |
2338 | ret = cma_connect_ib(id_priv, conn_param); | |
e51060f0 | 2339 | break; |
07ebafba TT |
2340 | case RDMA_TRANSPORT_IWARP: |
2341 | ret = cma_connect_iw(id_priv, conn_param); | |
2342 | break; | |
e51060f0 SH |
2343 | default: |
2344 | ret = -ENOSYS; | |
2345 | break; | |
2346 | } | |
2347 | if (ret) | |
2348 | goto err; | |
2349 | ||
2350 | return 0; | |
2351 | err: | |
2352 | cma_comp_exch(id_priv, CMA_CONNECT, CMA_ROUTE_RESOLVED); | |
2353 | return ret; | |
2354 | } | |
2355 | EXPORT_SYMBOL(rdma_connect); | |
2356 | ||
2357 | static int cma_accept_ib(struct rdma_id_private *id_priv, | |
2358 | struct rdma_conn_param *conn_param) | |
2359 | { | |
2360 | struct ib_cm_rep_param rep; | |
5851bb89 | 2361 | int ret; |
0fe313b0 | 2362 | |
5851bb89 SH |
2363 | ret = cma_modify_qp_rtr(id_priv, conn_param); |
2364 | if (ret) | |
2365 | goto out; | |
0fe313b0 | 2366 | |
5851bb89 SH |
2367 | ret = cma_modify_qp_rts(id_priv, conn_param); |
2368 | if (ret) | |
2369 | goto out; | |
e51060f0 SH |
2370 | |
2371 | memset(&rep, 0, sizeof rep); | |
2372 | rep.qp_num = id_priv->qp_num; | |
2373 | rep.starting_psn = id_priv->seq_num; | |
2374 | rep.private_data = conn_param->private_data; | |
2375 | rep.private_data_len = conn_param->private_data_len; | |
2376 | rep.responder_resources = conn_param->responder_resources; | |
2377 | rep.initiator_depth = conn_param->initiator_depth; | |
e51060f0 SH |
2378 | rep.failover_accepted = 0; |
2379 | rep.flow_control = conn_param->flow_control; | |
2380 | rep.rnr_retry_count = conn_param->rnr_retry_count; | |
2381 | rep.srq = id_priv->srq ? 1 : 0; | |
2382 | ||
0fe313b0 SH |
2383 | ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep); |
2384 | out: | |
2385 | return ret; | |
e51060f0 SH |
2386 | } |
2387 | ||
07ebafba TT |
2388 | static int cma_accept_iw(struct rdma_id_private *id_priv, |
2389 | struct rdma_conn_param *conn_param) | |
2390 | { | |
2391 | struct iw_cm_conn_param iw_param; | |
2392 | int ret; | |
2393 | ||
5851bb89 | 2394 | ret = cma_modify_qp_rtr(id_priv, conn_param); |
07ebafba TT |
2395 | if (ret) |
2396 | return ret; | |
2397 | ||
2398 | iw_param.ord = conn_param->initiator_depth; | |
2399 | iw_param.ird = conn_param->responder_resources; | |
2400 | iw_param.private_data = conn_param->private_data; | |
2401 | iw_param.private_data_len = conn_param->private_data_len; | |
2402 | if (id_priv->id.qp) { | |
2403 | iw_param.qpn = id_priv->qp_num; | |
2404 | } else | |
2405 | iw_param.qpn = conn_param->qp_num; | |
2406 | ||
2407 | return iw_cm_accept(id_priv->cm_id.iw, &iw_param); | |
2408 | } | |
2409 | ||
628e5f6d SH |
2410 | static int cma_send_sidr_rep(struct rdma_id_private *id_priv, |
2411 | enum ib_cm_sidr_status status, | |
2412 | const void *private_data, int private_data_len) | |
2413 | { | |
2414 | struct ib_cm_sidr_rep_param rep; | |
2415 | ||
2416 | memset(&rep, 0, sizeof rep); | |
2417 | rep.status = status; | |
2418 | if (status == IB_SIDR_SUCCESS) { | |
2419 | rep.qp_num = id_priv->qp_num; | |
c8f6a362 | 2420 | rep.qkey = id_priv->qkey; |
628e5f6d SH |
2421 | } |
2422 | rep.private_data = private_data; | |
2423 | rep.private_data_len = private_data_len; | |
2424 | ||
2425 | return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep); | |
2426 | } | |
2427 | ||
e51060f0 SH |
2428 | int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) |
2429 | { | |
2430 | struct rdma_id_private *id_priv; | |
2431 | int ret; | |
2432 | ||
2433 | id_priv = container_of(id, struct rdma_id_private, id); | |
2434 | if (!cma_comp(id_priv, CMA_CONNECT)) | |
2435 | return -EINVAL; | |
2436 | ||
2437 | if (!id->qp && conn_param) { | |
2438 | id_priv->qp_num = conn_param->qp_num; | |
e51060f0 SH |
2439 | id_priv->srq = conn_param->srq; |
2440 | } | |
2441 | ||
07ebafba TT |
2442 | switch (rdma_node_get_transport(id->device->node_type)) { |
2443 | case RDMA_TRANSPORT_IB: | |
c8f6a362 | 2444 | if (cma_is_ud_ps(id->ps)) |
628e5f6d SH |
2445 | ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS, |
2446 | conn_param->private_data, | |
2447 | conn_param->private_data_len); | |
2448 | else if (conn_param) | |
e51060f0 SH |
2449 | ret = cma_accept_ib(id_priv, conn_param); |
2450 | else | |
2451 | ret = cma_rep_recv(id_priv); | |
2452 | break; | |
07ebafba TT |
2453 | case RDMA_TRANSPORT_IWARP: |
2454 | ret = cma_accept_iw(id_priv, conn_param); | |
2455 | break; | |
e51060f0 SH |
2456 | default: |
2457 | ret = -ENOSYS; | |
2458 | break; | |
2459 | } | |
2460 | ||
2461 | if (ret) | |
2462 | goto reject; | |
2463 | ||
2464 | return 0; | |
2465 | reject: | |
c5483388 | 2466 | cma_modify_qp_err(id_priv); |
e51060f0 SH |
2467 | rdma_reject(id, NULL, 0); |
2468 | return ret; | |
2469 | } | |
2470 | EXPORT_SYMBOL(rdma_accept); | |
2471 | ||
0fe313b0 SH |
2472 | int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event) |
2473 | { | |
2474 | struct rdma_id_private *id_priv; | |
2475 | int ret; | |
2476 | ||
2477 | id_priv = container_of(id, struct rdma_id_private, id); | |
6c719f5c | 2478 | if (!cma_has_cm_dev(id_priv)) |
0fe313b0 SH |
2479 | return -EINVAL; |
2480 | ||
2481 | switch (id->device->node_type) { | |
2482 | case RDMA_NODE_IB_CA: | |
2483 | ret = ib_cm_notify(id_priv->cm_id.ib, event); | |
2484 | break; | |
2485 | default: | |
2486 | ret = 0; | |
2487 | break; | |
2488 | } | |
2489 | return ret; | |
2490 | } | |
2491 | EXPORT_SYMBOL(rdma_notify); | |
2492 | ||
e51060f0 SH |
2493 | int rdma_reject(struct rdma_cm_id *id, const void *private_data, |
2494 | u8 private_data_len) | |
2495 | { | |
2496 | struct rdma_id_private *id_priv; | |
2497 | int ret; | |
2498 | ||
2499 | id_priv = container_of(id, struct rdma_id_private, id); | |
6c719f5c | 2500 | if (!cma_has_cm_dev(id_priv)) |
e51060f0 SH |
2501 | return -EINVAL; |
2502 | ||
07ebafba TT |
2503 | switch (rdma_node_get_transport(id->device->node_type)) { |
2504 | case RDMA_TRANSPORT_IB: | |
c8f6a362 | 2505 | if (cma_is_ud_ps(id->ps)) |
628e5f6d SH |
2506 | ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, |
2507 | private_data, private_data_len); | |
2508 | else | |
2509 | ret = ib_send_cm_rej(id_priv->cm_id.ib, | |
2510 | IB_CM_REJ_CONSUMER_DEFINED, NULL, | |
2511 | 0, private_data, private_data_len); | |
e51060f0 | 2512 | break; |
07ebafba TT |
2513 | case RDMA_TRANSPORT_IWARP: |
2514 | ret = iw_cm_reject(id_priv->cm_id.iw, | |
2515 | private_data, private_data_len); | |
2516 | break; | |
e51060f0 SH |
2517 | default: |
2518 | ret = -ENOSYS; | |
2519 | break; | |
2520 | } | |
2521 | return ret; | |
2522 | } | |
2523 | EXPORT_SYMBOL(rdma_reject); | |
2524 | ||
2525 | int rdma_disconnect(struct rdma_cm_id *id) | |
2526 | { | |
2527 | struct rdma_id_private *id_priv; | |
2528 | int ret; | |
2529 | ||
2530 | id_priv = container_of(id, struct rdma_id_private, id); | |
6c719f5c | 2531 | if (!cma_has_cm_dev(id_priv)) |
e51060f0 SH |
2532 | return -EINVAL; |
2533 | ||
07ebafba TT |
2534 | switch (rdma_node_get_transport(id->device->node_type)) { |
2535 | case RDMA_TRANSPORT_IB: | |
c5483388 | 2536 | ret = cma_modify_qp_err(id_priv); |
07ebafba TT |
2537 | if (ret) |
2538 | goto out; | |
e51060f0 SH |
2539 | /* Initiate or respond to a disconnect. */ |
2540 | if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0)) | |
2541 | ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0); | |
2542 | break; | |
07ebafba TT |
2543 | case RDMA_TRANSPORT_IWARP: |
2544 | ret = iw_cm_disconnect(id_priv->cm_id.iw, 0); | |
2545 | break; | |
e51060f0 | 2546 | default: |
07ebafba | 2547 | ret = -EINVAL; |
e51060f0 SH |
2548 | break; |
2549 | } | |
2550 | out: | |
2551 | return ret; | |
2552 | } | |
2553 | EXPORT_SYMBOL(rdma_disconnect); | |
2554 | ||
c8f6a362 SH |
2555 | static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast) |
2556 | { | |
2557 | struct rdma_id_private *id_priv; | |
2558 | struct cma_multicast *mc = multicast->context; | |
2559 | struct rdma_cm_event event; | |
2560 | int ret; | |
2561 | ||
2562 | id_priv = mc->id_priv; | |
de910bd9 OG |
2563 | if (cma_disable_callback(id_priv, CMA_ADDR_BOUND) && |
2564 | cma_disable_callback(id_priv, CMA_ADDR_RESOLVED)) | |
8aa08602 | 2565 | return 0; |
c8f6a362 | 2566 | |
c5483388 | 2567 | mutex_lock(&id_priv->qp_mutex); |
c8f6a362 SH |
2568 | if (!status && id_priv->id.qp) |
2569 | status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid, | |
2570 | multicast->rec.mlid); | |
c5483388 | 2571 | mutex_unlock(&id_priv->qp_mutex); |
c8f6a362 SH |
2572 | |
2573 | memset(&event, 0, sizeof event); | |
2574 | event.status = status; | |
2575 | event.param.ud.private_data = mc->context; | |
2576 | if (!status) { | |
2577 | event.event = RDMA_CM_EVENT_MULTICAST_JOIN; | |
2578 | ib_init_ah_from_mcmember(id_priv->id.device, | |
2579 | id_priv->id.port_num, &multicast->rec, | |
2580 | &event.param.ud.ah_attr); | |
2581 | event.param.ud.qp_num = 0xFFFFFF; | |
2582 | event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey); | |
2583 | } else | |
2584 | event.event = RDMA_CM_EVENT_MULTICAST_ERROR; | |
2585 | ||
2586 | ret = id_priv->id.event_handler(&id_priv->id, &event); | |
2587 | if (ret) { | |
2588 | cma_exch(id_priv, CMA_DESTROYING); | |
de910bd9 | 2589 | mutex_unlock(&id_priv->handler_mutex); |
c8f6a362 SH |
2590 | rdma_destroy_id(&id_priv->id); |
2591 | return 0; | |
2592 | } | |
8aa08602 | 2593 | |
de910bd9 | 2594 | mutex_unlock(&id_priv->handler_mutex); |
c8f6a362 SH |
2595 | return 0; |
2596 | } | |
2597 | ||
2598 | static void cma_set_mgid(struct rdma_id_private *id_priv, | |
2599 | struct sockaddr *addr, union ib_gid *mgid) | |
2600 | { | |
2601 | unsigned char mc_map[MAX_ADDR_LEN]; | |
2602 | struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; | |
2603 | struct sockaddr_in *sin = (struct sockaddr_in *) addr; | |
2604 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr; | |
2605 | ||
2606 | if (cma_any_addr(addr)) { | |
2607 | memset(mgid, 0, sizeof *mgid); | |
2608 | } else if ((addr->sa_family == AF_INET6) && | |
2609 | ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFF10A01B) == | |
2610 | 0xFF10A01B)) { | |
2611 | /* IPv6 address is an SA assigned MGID. */ | |
2612 | memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); | |
2613 | } else { | |
a9e527e3 | 2614 | ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map); |
c8f6a362 SH |
2615 | if (id_priv->id.ps == RDMA_PS_UDP) |
2616 | mc_map[7] = 0x01; /* Use RDMA CM signature */ | |
c8f6a362 SH |
2617 | *mgid = *(union ib_gid *) (mc_map + 4); |
2618 | } | |
2619 | } | |
2620 | ||
2621 | static int cma_join_ib_multicast(struct rdma_id_private *id_priv, | |
2622 | struct cma_multicast *mc) | |
2623 | { | |
2624 | struct ib_sa_mcmember_rec rec; | |
2625 | struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; | |
2626 | ib_sa_comp_mask comp_mask; | |
2627 | int ret; | |
2628 | ||
2629 | ib_addr_get_mgid(dev_addr, &rec.mgid); | |
2630 | ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num, | |
2631 | &rec.mgid, &rec); | |
2632 | if (ret) | |
2633 | return ret; | |
2634 | ||
2635 | cma_set_mgid(id_priv, &mc->addr, &rec.mgid); | |
2636 | if (id_priv->id.ps == RDMA_PS_UDP) | |
2637 | rec.qkey = cpu_to_be32(RDMA_UDP_QKEY); | |
2638 | ib_addr_get_sgid(dev_addr, &rec.port_gid); | |
2639 | rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); | |
2640 | rec.join_state = 1; | |
2641 | ||
2642 | comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID | | |
2643 | IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE | | |
2644 | IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL | | |
2645 | IB_SA_MCMEMBER_REC_FLOW_LABEL | | |
2646 | IB_SA_MCMEMBER_REC_TRAFFIC_CLASS; | |
2647 | ||
2648 | mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device, | |
2649 | id_priv->id.port_num, &rec, | |
2650 | comp_mask, GFP_KERNEL, | |
2651 | cma_ib_mc_handler, mc); | |
2652 | if (IS_ERR(mc->multicast.ib)) | |
2653 | return PTR_ERR(mc->multicast.ib); | |
2654 | ||
2655 | return 0; | |
2656 | } | |
2657 | ||
2658 | int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr, | |
2659 | void *context) | |
2660 | { | |
2661 | struct rdma_id_private *id_priv; | |
2662 | struct cma_multicast *mc; | |
2663 | int ret; | |
2664 | ||
2665 | id_priv = container_of(id, struct rdma_id_private, id); | |
2666 | if (!cma_comp(id_priv, CMA_ADDR_BOUND) && | |
2667 | !cma_comp(id_priv, CMA_ADDR_RESOLVED)) | |
2668 | return -EINVAL; | |
2669 | ||
2670 | mc = kmalloc(sizeof *mc, GFP_KERNEL); | |
2671 | if (!mc) | |
2672 | return -ENOMEM; | |
2673 | ||
2674 | memcpy(&mc->addr, addr, ip_addr_size(addr)); | |
2675 | mc->context = context; | |
2676 | mc->id_priv = id_priv; | |
2677 | ||
2678 | spin_lock(&id_priv->lock); | |
2679 | list_add(&mc->list, &id_priv->mc_list); | |
2680 | spin_unlock(&id_priv->lock); | |
2681 | ||
2682 | switch (rdma_node_get_transport(id->device->node_type)) { | |
2683 | case RDMA_TRANSPORT_IB: | |
2684 | ret = cma_join_ib_multicast(id_priv, mc); | |
2685 | break; | |
2686 | default: | |
2687 | ret = -ENOSYS; | |
2688 | break; | |
2689 | } | |
2690 | ||
2691 | if (ret) { | |
2692 | spin_lock_irq(&id_priv->lock); | |
2693 | list_del(&mc->list); | |
2694 | spin_unlock_irq(&id_priv->lock); | |
2695 | kfree(mc); | |
2696 | } | |
2697 | return ret; | |
2698 | } | |
2699 | EXPORT_SYMBOL(rdma_join_multicast); | |
2700 | ||
2701 | void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr) | |
2702 | { | |
2703 | struct rdma_id_private *id_priv; | |
2704 | struct cma_multicast *mc; | |
2705 | ||
2706 | id_priv = container_of(id, struct rdma_id_private, id); | |
2707 | spin_lock_irq(&id_priv->lock); | |
2708 | list_for_each_entry(mc, &id_priv->mc_list, list) { | |
2709 | if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) { | |
2710 | list_del(&mc->list); | |
2711 | spin_unlock_irq(&id_priv->lock); | |
2712 | ||
2713 | if (id->qp) | |
2714 | ib_detach_mcast(id->qp, | |
2715 | &mc->multicast.ib->rec.mgid, | |
2716 | mc->multicast.ib->rec.mlid); | |
2717 | ib_sa_free_multicast(mc->multicast.ib); | |
2718 | kfree(mc); | |
2719 | return; | |
2720 | } | |
2721 | } | |
2722 | spin_unlock_irq(&id_priv->lock); | |
2723 | } | |
2724 | EXPORT_SYMBOL(rdma_leave_multicast); | |
2725 | ||
e51060f0 SH |
2726 | static void cma_add_one(struct ib_device *device) |
2727 | { | |
2728 | struct cma_device *cma_dev; | |
2729 | struct rdma_id_private *id_priv; | |
2730 | ||
2731 | cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL); | |
2732 | if (!cma_dev) | |
2733 | return; | |
2734 | ||
2735 | cma_dev->device = device; | |
e51060f0 SH |
2736 | |
2737 | init_completion(&cma_dev->comp); | |
2738 | atomic_set(&cma_dev->refcount, 1); | |
2739 | INIT_LIST_HEAD(&cma_dev->id_list); | |
2740 | ib_set_client_data(device, &cma_client, cma_dev); | |
2741 | ||
2742 | mutex_lock(&lock); | |
2743 | list_add_tail(&cma_dev->list, &dev_list); | |
2744 | list_for_each_entry(id_priv, &listen_any_list, list) | |
2745 | cma_listen_on_dev(id_priv, cma_dev); | |
2746 | mutex_unlock(&lock); | |
e51060f0 SH |
2747 | } |
2748 | ||
2749 | static int cma_remove_id_dev(struct rdma_id_private *id_priv) | |
2750 | { | |
a1b1b61f | 2751 | struct rdma_cm_event event; |
e51060f0 | 2752 | enum cma_state state; |
de910bd9 | 2753 | int ret = 0; |
e51060f0 SH |
2754 | |
2755 | /* Record that we want to remove the device */ | |
2756 | state = cma_exch(id_priv, CMA_DEVICE_REMOVAL); | |
2757 | if (state == CMA_DESTROYING) | |
2758 | return 0; | |
2759 | ||
2760 | cma_cancel_operation(id_priv, state); | |
de910bd9 | 2761 | mutex_lock(&id_priv->handler_mutex); |
e51060f0 SH |
2762 | |
2763 | /* Check for destruction from another callback. */ | |
2764 | if (!cma_comp(id_priv, CMA_DEVICE_REMOVAL)) | |
de910bd9 | 2765 | goto out; |
e51060f0 | 2766 | |
a1b1b61f SH |
2767 | memset(&event, 0, sizeof event); |
2768 | event.event = RDMA_CM_EVENT_DEVICE_REMOVAL; | |
de910bd9 OG |
2769 | ret = id_priv->id.event_handler(&id_priv->id, &event); |
2770 | out: | |
2771 | mutex_unlock(&id_priv->handler_mutex); | |
2772 | return ret; | |
e51060f0 SH |
2773 | } |
2774 | ||
2775 | static void cma_process_remove(struct cma_device *cma_dev) | |
2776 | { | |
e51060f0 SH |
2777 | struct rdma_id_private *id_priv; |
2778 | int ret; | |
2779 | ||
e51060f0 SH |
2780 | mutex_lock(&lock); |
2781 | while (!list_empty(&cma_dev->id_list)) { | |
2782 | id_priv = list_entry(cma_dev->id_list.next, | |
2783 | struct rdma_id_private, list); | |
2784 | ||
d02d1f53 | 2785 | list_del(&id_priv->listen_list); |
94de178a | 2786 | list_del_init(&id_priv->list); |
e51060f0 SH |
2787 | atomic_inc(&id_priv->refcount); |
2788 | mutex_unlock(&lock); | |
2789 | ||
d02d1f53 | 2790 | ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv); |
e51060f0 SH |
2791 | cma_deref_id(id_priv); |
2792 | if (ret) | |
2793 | rdma_destroy_id(&id_priv->id); | |
2794 | ||
2795 | mutex_lock(&lock); | |
2796 | } | |
2797 | mutex_unlock(&lock); | |
2798 | ||
2799 | cma_deref_dev(cma_dev); | |
2800 | wait_for_completion(&cma_dev->comp); | |
2801 | } | |
2802 | ||
2803 | static void cma_remove_one(struct ib_device *device) | |
2804 | { | |
2805 | struct cma_device *cma_dev; | |
2806 | ||
2807 | cma_dev = ib_get_client_data(device, &cma_client); | |
2808 | if (!cma_dev) | |
2809 | return; | |
2810 | ||
2811 | mutex_lock(&lock); | |
2812 | list_del(&cma_dev->list); | |
2813 | mutex_unlock(&lock); | |
2814 | ||
2815 | cma_process_remove(cma_dev); | |
2816 | kfree(cma_dev); | |
2817 | } | |
2818 | ||
2819 | static int cma_init(void) | |
2820 | { | |
a25de534 | 2821 | int ret, low, high, remaining; |
e51060f0 | 2822 | |
aedec080 | 2823 | get_random_bytes(&next_port, sizeof next_port); |
227b60f5 | 2824 | inet_get_local_port_range(&low, &high); |
a25de534 AA |
2825 | remaining = (high - low) + 1; |
2826 | next_port = ((unsigned int) next_port % remaining) + low; | |
227b60f5 | 2827 | |
c7f743a6 | 2828 | cma_wq = create_singlethread_workqueue("rdma_cm"); |
e51060f0 SH |
2829 | if (!cma_wq) |
2830 | return -ENOMEM; | |
2831 | ||
c1a0b23b | 2832 | ib_sa_register_client(&sa_client); |
7a118df3 | 2833 | rdma_addr_register_client(&addr_client); |
c1a0b23b | 2834 | |
e51060f0 SH |
2835 | ret = ib_register_client(&cma_client); |
2836 | if (ret) | |
2837 | goto err; | |
2838 | return 0; | |
2839 | ||
2840 | err: | |
7a118df3 | 2841 | rdma_addr_unregister_client(&addr_client); |
c1a0b23b | 2842 | ib_sa_unregister_client(&sa_client); |
e51060f0 SH |
2843 | destroy_workqueue(cma_wq); |
2844 | return ret; | |
2845 | } | |
2846 | ||
2847 | static void cma_cleanup(void) | |
2848 | { | |
2849 | ib_unregister_client(&cma_client); | |
7a118df3 | 2850 | rdma_addr_unregister_client(&addr_client); |
c1a0b23b | 2851 | ib_sa_unregister_client(&sa_client); |
e51060f0 SH |
2852 | destroy_workqueue(cma_wq); |
2853 | idr_destroy(&sdp_ps); | |
2854 | idr_destroy(&tcp_ps); | |
628e5f6d | 2855 | idr_destroy(&udp_ps); |
c8f6a362 | 2856 | idr_destroy(&ipoib_ps); |
e51060f0 SH |
2857 | } |
2858 | ||
2859 | module_init(cma_init); | |
2860 | module_exit(cma_cleanup); |