Commit | Line | Data |
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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> |
5a0e3ad6 | 43 | #include <linux/slab.h> |
e51060f0 SH |
44 | |
45 | #include <net/tcp.h> | |
1f5175ad | 46 | #include <net/ipv6.h> |
e51060f0 SH |
47 | |
48 | #include <rdma/rdma_cm.h> | |
49 | #include <rdma/rdma_cm_ib.h> | |
50 | #include <rdma/ib_cache.h> | |
51 | #include <rdma/ib_cm.h> | |
52 | #include <rdma/ib_sa.h> | |
07ebafba | 53 | #include <rdma/iw_cm.h> |
e51060f0 SH |
54 | |
55 | MODULE_AUTHOR("Sean Hefty"); | |
56 | MODULE_DESCRIPTION("Generic RDMA CM Agent"); | |
57 | MODULE_LICENSE("Dual BSD/GPL"); | |
58 | ||
59 | #define CMA_CM_RESPONSE_TIMEOUT 20 | |
d5bb7599 | 60 | #define CMA_MAX_CM_RETRIES 15 |
dcb3f974 | 61 | #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24) |
e51060f0 SH |
62 | |
63 | static void cma_add_one(struct ib_device *device); | |
64 | static void cma_remove_one(struct ib_device *device); | |
65 | ||
66 | static struct ib_client cma_client = { | |
67 | .name = "cma", | |
68 | .add = cma_add_one, | |
69 | .remove = cma_remove_one | |
70 | }; | |
71 | ||
c1a0b23b | 72 | static struct ib_sa_client sa_client; |
7a118df3 | 73 | static struct rdma_addr_client addr_client; |
e51060f0 SH |
74 | static LIST_HEAD(dev_list); |
75 | static LIST_HEAD(listen_any_list); | |
76 | static DEFINE_MUTEX(lock); | |
77 | static struct workqueue_struct *cma_wq; | |
78 | static DEFINE_IDR(sdp_ps); | |
79 | static DEFINE_IDR(tcp_ps); | |
628e5f6d | 80 | static DEFINE_IDR(udp_ps); |
c8f6a362 | 81 | static DEFINE_IDR(ipoib_ps); |
aedec080 | 82 | static int next_port; |
e51060f0 SH |
83 | |
84 | struct cma_device { | |
85 | struct list_head list; | |
86 | struct ib_device *device; | |
e51060f0 SH |
87 | struct completion comp; |
88 | atomic_t refcount; | |
89 | struct list_head id_list; | |
90 | }; | |
91 | ||
92 | enum cma_state { | |
93 | CMA_IDLE, | |
94 | CMA_ADDR_QUERY, | |
95 | CMA_ADDR_RESOLVED, | |
96 | CMA_ROUTE_QUERY, | |
97 | CMA_ROUTE_RESOLVED, | |
98 | CMA_CONNECT, | |
99 | CMA_DISCONNECT, | |
100 | CMA_ADDR_BOUND, | |
101 | CMA_LISTEN, | |
102 | CMA_DEVICE_REMOVAL, | |
103 | CMA_DESTROYING | |
104 | }; | |
105 | ||
106 | struct rdma_bind_list { | |
107 | struct idr *ps; | |
108 | struct hlist_head owners; | |
109 | unsigned short port; | |
110 | }; | |
111 | ||
112 | /* | |
113 | * Device removal can occur at anytime, so we need extra handling to | |
114 | * serialize notifying the user of device removal with other callbacks. | |
115 | * We do this by disabling removal notification while a callback is in process, | |
116 | * and reporting it after the callback completes. | |
117 | */ | |
118 | struct rdma_id_private { | |
119 | struct rdma_cm_id id; | |
120 | ||
121 | struct rdma_bind_list *bind_list; | |
122 | struct hlist_node node; | |
d02d1f53 SH |
123 | struct list_head list; /* listen_any_list or cma_device.list */ |
124 | struct list_head listen_list; /* per device listens */ | |
e51060f0 | 125 | struct cma_device *cma_dev; |
c8f6a362 | 126 | struct list_head mc_list; |
e51060f0 | 127 | |
d02d1f53 | 128 | int internal_id; |
e51060f0 SH |
129 | enum cma_state state; |
130 | spinlock_t lock; | |
c5483388 SH |
131 | struct mutex qp_mutex; |
132 | ||
e51060f0 SH |
133 | struct completion comp; |
134 | atomic_t refcount; | |
de910bd9 | 135 | struct mutex handler_mutex; |
e51060f0 SH |
136 | |
137 | int backlog; | |
138 | int timeout_ms; | |
139 | struct ib_sa_query *query; | |
140 | int query_id; | |
141 | union { | |
142 | struct ib_cm_id *ib; | |
07ebafba | 143 | struct iw_cm_id *iw; |
e51060f0 SH |
144 | } cm_id; |
145 | ||
146 | u32 seq_num; | |
c8f6a362 | 147 | u32 qkey; |
e51060f0 | 148 | u32 qp_num; |
e51060f0 | 149 | u8 srq; |
a81c994d | 150 | u8 tos; |
e51060f0 SH |
151 | }; |
152 | ||
c8f6a362 SH |
153 | struct cma_multicast { |
154 | struct rdma_id_private *id_priv; | |
155 | union { | |
156 | struct ib_sa_multicast *ib; | |
157 | } multicast; | |
158 | struct list_head list; | |
159 | void *context; | |
3f446754 | 160 | struct sockaddr_storage addr; |
c8f6a362 SH |
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 | ||
dd5bdff8 OG |
171 | struct cma_ndev_work { |
172 | struct work_struct work; | |
173 | struct rdma_id_private *id; | |
174 | struct rdma_cm_event event; | |
175 | }; | |
176 | ||
e51060f0 SH |
177 | union cma_ip_addr { |
178 | struct in6_addr ip6; | |
179 | struct { | |
1b90c137 AV |
180 | __be32 pad[3]; |
181 | __be32 addr; | |
e51060f0 SH |
182 | } ip4; |
183 | }; | |
184 | ||
185 | struct cma_hdr { | |
186 | u8 cma_version; | |
187 | u8 ip_version; /* IP version: 7:4 */ | |
1b90c137 | 188 | __be16 port; |
e51060f0 SH |
189 | union cma_ip_addr src_addr; |
190 | union cma_ip_addr dst_addr; | |
191 | }; | |
192 | ||
193 | struct sdp_hh { | |
194 | u8 bsdh[16]; | |
195 | u8 sdp_version; /* Major version: 7:4 */ | |
196 | u8 ip_version; /* IP version: 7:4 */ | |
197 | u8 sdp_specific1[10]; | |
1b90c137 AV |
198 | __be16 port; |
199 | __be16 sdp_specific2; | |
e51060f0 SH |
200 | union cma_ip_addr src_addr; |
201 | union cma_ip_addr dst_addr; | |
202 | }; | |
203 | ||
204 | struct sdp_hah { | |
205 | u8 bsdh[16]; | |
206 | u8 sdp_version; | |
207 | }; | |
208 | ||
209 | #define CMA_VERSION 0x00 | |
210 | #define SDP_MAJ_VERSION 0x2 | |
211 | ||
212 | static int cma_comp(struct rdma_id_private *id_priv, enum cma_state comp) | |
213 | { | |
214 | unsigned long flags; | |
215 | int ret; | |
216 | ||
217 | spin_lock_irqsave(&id_priv->lock, flags); | |
218 | ret = (id_priv->state == comp); | |
219 | spin_unlock_irqrestore(&id_priv->lock, flags); | |
220 | return ret; | |
221 | } | |
222 | ||
223 | static int cma_comp_exch(struct rdma_id_private *id_priv, | |
224 | enum cma_state comp, enum cma_state exch) | |
225 | { | |
226 | unsigned long flags; | |
227 | int ret; | |
228 | ||
229 | spin_lock_irqsave(&id_priv->lock, flags); | |
230 | if ((ret = (id_priv->state == comp))) | |
231 | id_priv->state = exch; | |
232 | spin_unlock_irqrestore(&id_priv->lock, flags); | |
233 | return ret; | |
234 | } | |
235 | ||
236 | static enum cma_state cma_exch(struct rdma_id_private *id_priv, | |
237 | enum cma_state exch) | |
238 | { | |
239 | unsigned long flags; | |
240 | enum cma_state old; | |
241 | ||
242 | spin_lock_irqsave(&id_priv->lock, flags); | |
243 | old = id_priv->state; | |
244 | id_priv->state = exch; | |
245 | spin_unlock_irqrestore(&id_priv->lock, flags); | |
246 | return old; | |
247 | } | |
248 | ||
249 | static inline u8 cma_get_ip_ver(struct cma_hdr *hdr) | |
250 | { | |
251 | return hdr->ip_version >> 4; | |
252 | } | |
253 | ||
254 | static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver) | |
255 | { | |
256 | hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF); | |
257 | } | |
258 | ||
259 | static inline u8 sdp_get_majv(u8 sdp_version) | |
260 | { | |
261 | return sdp_version >> 4; | |
262 | } | |
263 | ||
264 | static inline u8 sdp_get_ip_ver(struct sdp_hh *hh) | |
265 | { | |
266 | return hh->ip_version >> 4; | |
267 | } | |
268 | ||
269 | static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver) | |
270 | { | |
271 | hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF); | |
272 | } | |
273 | ||
c8f6a362 SH |
274 | static inline int cma_is_ud_ps(enum rdma_port_space ps) |
275 | { | |
276 | return (ps == RDMA_PS_UDP || ps == RDMA_PS_IPOIB); | |
277 | } | |
278 | ||
e51060f0 SH |
279 | static void cma_attach_to_dev(struct rdma_id_private *id_priv, |
280 | struct cma_device *cma_dev) | |
281 | { | |
282 | atomic_inc(&cma_dev->refcount); | |
283 | id_priv->cma_dev = cma_dev; | |
284 | id_priv->id.device = cma_dev->device; | |
285 | list_add_tail(&id_priv->list, &cma_dev->id_list); | |
286 | } | |
287 | ||
288 | static inline void cma_deref_dev(struct cma_device *cma_dev) | |
289 | { | |
290 | if (atomic_dec_and_test(&cma_dev->refcount)) | |
291 | complete(&cma_dev->comp); | |
292 | } | |
293 | ||
294 | static void cma_detach_from_dev(struct rdma_id_private *id_priv) | |
295 | { | |
296 | list_del(&id_priv->list); | |
297 | cma_deref_dev(id_priv->cma_dev); | |
298 | id_priv->cma_dev = NULL; | |
299 | } | |
300 | ||
d2ca39f2 | 301 | static int cma_set_qkey(struct rdma_id_private *id_priv) |
c8f6a362 SH |
302 | { |
303 | struct ib_sa_mcmember_rec rec; | |
304 | int ret = 0; | |
305 | ||
d2ca39f2 YE |
306 | if (id_priv->qkey) |
307 | return 0; | |
308 | ||
309 | switch (id_priv->id.ps) { | |
c8f6a362 | 310 | case RDMA_PS_UDP: |
d2ca39f2 | 311 | id_priv->qkey = RDMA_UDP_QKEY; |
c8f6a362 SH |
312 | break; |
313 | case RDMA_PS_IPOIB: | |
d2ca39f2 YE |
314 | ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid); |
315 | ret = ib_sa_get_mcmember_rec(id_priv->id.device, | |
316 | id_priv->id.port_num, &rec.mgid, | |
317 | &rec); | |
318 | if (!ret) | |
319 | id_priv->qkey = be32_to_cpu(rec.qkey); | |
c8f6a362 SH |
320 | break; |
321 | default: | |
322 | break; | |
323 | } | |
324 | return ret; | |
325 | } | |
326 | ||
07ebafba | 327 | static int cma_acquire_dev(struct rdma_id_private *id_priv) |
e51060f0 | 328 | { |
c8f6a362 | 329 | struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; |
e51060f0 | 330 | struct cma_device *cma_dev; |
f0ee3404 | 331 | union ib_gid gid; |
e51060f0 SH |
332 | int ret = -ENODEV; |
333 | ||
6f8372b6 | 334 | rdma_addr_get_sgid(dev_addr, &gid); |
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) { | |
d2ca39f2 | 339 | cma_attach_to_dev(id_priv, cma_dev); |
e51060f0 SH |
340 | break; |
341 | } | |
342 | } | |
e51060f0 SH |
343 | return ret; |
344 | } | |
345 | ||
e51060f0 SH |
346 | static void cma_deref_id(struct rdma_id_private *id_priv) |
347 | { | |
348 | if (atomic_dec_and_test(&id_priv->refcount)) | |
349 | complete(&id_priv->comp); | |
350 | } | |
351 | ||
de910bd9 | 352 | static int cma_disable_callback(struct rdma_id_private *id_priv, |
8aa08602 SH |
353 | enum cma_state state) |
354 | { | |
de910bd9 OG |
355 | mutex_lock(&id_priv->handler_mutex); |
356 | if (id_priv->state != state) { | |
357 | mutex_unlock(&id_priv->handler_mutex); | |
358 | return -EINVAL; | |
359 | } | |
360 | return 0; | |
e51060f0 SH |
361 | } |
362 | ||
6c719f5c SH |
363 | static int cma_has_cm_dev(struct rdma_id_private *id_priv) |
364 | { | |
365 | return (id_priv->id.device && id_priv->cm_id.ib); | |
366 | } | |
367 | ||
e51060f0 SH |
368 | struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler, |
369 | void *context, enum rdma_port_space ps) | |
370 | { | |
371 | struct rdma_id_private *id_priv; | |
372 | ||
373 | id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL); | |
374 | if (!id_priv) | |
375 | return ERR_PTR(-ENOMEM); | |
376 | ||
377 | id_priv->state = CMA_IDLE; | |
378 | id_priv->id.context = context; | |
379 | id_priv->id.event_handler = event_handler; | |
380 | id_priv->id.ps = ps; | |
381 | spin_lock_init(&id_priv->lock); | |
c5483388 | 382 | mutex_init(&id_priv->qp_mutex); |
e51060f0 SH |
383 | init_completion(&id_priv->comp); |
384 | atomic_set(&id_priv->refcount, 1); | |
de910bd9 | 385 | mutex_init(&id_priv->handler_mutex); |
e51060f0 | 386 | INIT_LIST_HEAD(&id_priv->listen_list); |
c8f6a362 | 387 | INIT_LIST_HEAD(&id_priv->mc_list); |
e51060f0 SH |
388 | get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num); |
389 | ||
390 | return &id_priv->id; | |
391 | } | |
392 | EXPORT_SYMBOL(rdma_create_id); | |
393 | ||
c8f6a362 | 394 | static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) |
e51060f0 SH |
395 | { |
396 | struct ib_qp_attr qp_attr; | |
c8f6a362 | 397 | int qp_attr_mask, ret; |
e51060f0 | 398 | |
c8f6a362 SH |
399 | qp_attr.qp_state = IB_QPS_INIT; |
400 | ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); | |
e51060f0 SH |
401 | if (ret) |
402 | return ret; | |
403 | ||
c8f6a362 SH |
404 | ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); |
405 | if (ret) | |
406 | return ret; | |
407 | ||
408 | qp_attr.qp_state = IB_QPS_RTR; | |
409 | ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE); | |
410 | if (ret) | |
411 | return ret; | |
412 | ||
413 | qp_attr.qp_state = IB_QPS_RTS; | |
414 | qp_attr.sq_psn = 0; | |
415 | ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN); | |
416 | ||
417 | return ret; | |
e51060f0 SH |
418 | } |
419 | ||
c8f6a362 | 420 | static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) |
07ebafba TT |
421 | { |
422 | struct ib_qp_attr qp_attr; | |
c8f6a362 | 423 | int qp_attr_mask, ret; |
07ebafba TT |
424 | |
425 | qp_attr.qp_state = IB_QPS_INIT; | |
c8f6a362 SH |
426 | ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); |
427 | if (ret) | |
428 | return ret; | |
07ebafba | 429 | |
c8f6a362 | 430 | return ib_modify_qp(qp, &qp_attr, qp_attr_mask); |
07ebafba TT |
431 | } |
432 | ||
e51060f0 SH |
433 | int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd, |
434 | struct ib_qp_init_attr *qp_init_attr) | |
435 | { | |
436 | struct rdma_id_private *id_priv; | |
437 | struct ib_qp *qp; | |
438 | int ret; | |
439 | ||
440 | id_priv = container_of(id, struct rdma_id_private, id); | |
441 | if (id->device != pd->device) | |
442 | return -EINVAL; | |
443 | ||
444 | qp = ib_create_qp(pd, qp_init_attr); | |
445 | if (IS_ERR(qp)) | |
446 | return PTR_ERR(qp); | |
447 | ||
c8f6a362 SH |
448 | if (cma_is_ud_ps(id_priv->id.ps)) |
449 | ret = cma_init_ud_qp(id_priv, qp); | |
450 | else | |
451 | ret = cma_init_conn_qp(id_priv, qp); | |
e51060f0 SH |
452 | if (ret) |
453 | goto err; | |
454 | ||
455 | id->qp = qp; | |
456 | id_priv->qp_num = qp->qp_num; | |
e51060f0 SH |
457 | id_priv->srq = (qp->srq != NULL); |
458 | return 0; | |
459 | err: | |
460 | ib_destroy_qp(qp); | |
461 | return ret; | |
462 | } | |
463 | EXPORT_SYMBOL(rdma_create_qp); | |
464 | ||
465 | void rdma_destroy_qp(struct rdma_cm_id *id) | |
466 | { | |
c5483388 SH |
467 | struct rdma_id_private *id_priv; |
468 | ||
469 | id_priv = container_of(id, struct rdma_id_private, id); | |
470 | mutex_lock(&id_priv->qp_mutex); | |
471 | ib_destroy_qp(id_priv->id.qp); | |
472 | id_priv->id.qp = NULL; | |
473 | mutex_unlock(&id_priv->qp_mutex); | |
e51060f0 SH |
474 | } |
475 | EXPORT_SYMBOL(rdma_destroy_qp); | |
476 | ||
5851bb89 SH |
477 | static int cma_modify_qp_rtr(struct rdma_id_private *id_priv, |
478 | struct rdma_conn_param *conn_param) | |
e51060f0 SH |
479 | { |
480 | struct ib_qp_attr qp_attr; | |
481 | int qp_attr_mask, ret; | |
482 | ||
c5483388 SH |
483 | mutex_lock(&id_priv->qp_mutex); |
484 | if (!id_priv->id.qp) { | |
485 | ret = 0; | |
486 | goto out; | |
487 | } | |
e51060f0 SH |
488 | |
489 | /* Need to update QP attributes from default values. */ | |
490 | qp_attr.qp_state = IB_QPS_INIT; | |
c5483388 | 491 | ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); |
e51060f0 | 492 | if (ret) |
c5483388 | 493 | goto out; |
e51060f0 | 494 | |
c5483388 | 495 | ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); |
e51060f0 | 496 | if (ret) |
c5483388 | 497 | goto out; |
e51060f0 SH |
498 | |
499 | qp_attr.qp_state = IB_QPS_RTR; | |
c5483388 | 500 | ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); |
e51060f0 | 501 | if (ret) |
c5483388 | 502 | goto out; |
e51060f0 | 503 | |
5851bb89 SH |
504 | if (conn_param) |
505 | qp_attr.max_dest_rd_atomic = conn_param->responder_resources; | |
c5483388 SH |
506 | ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); |
507 | out: | |
508 | mutex_unlock(&id_priv->qp_mutex); | |
509 | return ret; | |
e51060f0 SH |
510 | } |
511 | ||
5851bb89 SH |
512 | static int cma_modify_qp_rts(struct rdma_id_private *id_priv, |
513 | struct rdma_conn_param *conn_param) | |
e51060f0 SH |
514 | { |
515 | struct ib_qp_attr qp_attr; | |
516 | int qp_attr_mask, ret; | |
517 | ||
c5483388 SH |
518 | mutex_lock(&id_priv->qp_mutex); |
519 | if (!id_priv->id.qp) { | |
520 | ret = 0; | |
521 | goto out; | |
522 | } | |
e51060f0 SH |
523 | |
524 | qp_attr.qp_state = IB_QPS_RTS; | |
c5483388 | 525 | ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); |
e51060f0 | 526 | if (ret) |
c5483388 | 527 | goto out; |
e51060f0 | 528 | |
5851bb89 SH |
529 | if (conn_param) |
530 | qp_attr.max_rd_atomic = conn_param->initiator_depth; | |
c5483388 SH |
531 | ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); |
532 | out: | |
533 | mutex_unlock(&id_priv->qp_mutex); | |
534 | return ret; | |
e51060f0 SH |
535 | } |
536 | ||
c5483388 | 537 | static int cma_modify_qp_err(struct rdma_id_private *id_priv) |
e51060f0 SH |
538 | { |
539 | struct ib_qp_attr qp_attr; | |
c5483388 | 540 | int ret; |
e51060f0 | 541 | |
c5483388 SH |
542 | mutex_lock(&id_priv->qp_mutex); |
543 | if (!id_priv->id.qp) { | |
544 | ret = 0; | |
545 | goto out; | |
546 | } | |
e51060f0 SH |
547 | |
548 | qp_attr.qp_state = IB_QPS_ERR; | |
c5483388 SH |
549 | ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE); |
550 | out: | |
551 | mutex_unlock(&id_priv->qp_mutex); | |
552 | return ret; | |
e51060f0 SH |
553 | } |
554 | ||
c8f6a362 SH |
555 | static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv, |
556 | struct ib_qp_attr *qp_attr, int *qp_attr_mask) | |
557 | { | |
558 | struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; | |
559 | int ret; | |
560 | ||
561 | ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num, | |
562 | ib_addr_get_pkey(dev_addr), | |
563 | &qp_attr->pkey_index); | |
564 | if (ret) | |
565 | return ret; | |
566 | ||
567 | qp_attr->port_num = id_priv->id.port_num; | |
568 | *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT; | |
569 | ||
570 | if (cma_is_ud_ps(id_priv->id.ps)) { | |
d2ca39f2 YE |
571 | ret = cma_set_qkey(id_priv); |
572 | if (ret) | |
573 | return ret; | |
574 | ||
c8f6a362 SH |
575 | qp_attr->qkey = id_priv->qkey; |
576 | *qp_attr_mask |= IB_QP_QKEY; | |
577 | } else { | |
578 | qp_attr->qp_access_flags = 0; | |
579 | *qp_attr_mask |= IB_QP_ACCESS_FLAGS; | |
580 | } | |
581 | return 0; | |
582 | } | |
583 | ||
e51060f0 SH |
584 | int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr, |
585 | int *qp_attr_mask) | |
586 | { | |
587 | struct rdma_id_private *id_priv; | |
c8f6a362 | 588 | int ret = 0; |
e51060f0 SH |
589 | |
590 | id_priv = container_of(id, struct rdma_id_private, id); | |
07ebafba TT |
591 | switch (rdma_node_get_transport(id_priv->id.device->node_type)) { |
592 | case RDMA_TRANSPORT_IB: | |
c8f6a362 SH |
593 | if (!id_priv->cm_id.ib || cma_is_ud_ps(id_priv->id.ps)) |
594 | ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask); | |
595 | else | |
596 | ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr, | |
597 | qp_attr_mask); | |
e51060f0 SH |
598 | if (qp_attr->qp_state == IB_QPS_RTR) |
599 | qp_attr->rq_psn = id_priv->seq_num; | |
600 | break; | |
07ebafba | 601 | case RDMA_TRANSPORT_IWARP: |
c8f6a362 | 602 | if (!id_priv->cm_id.iw) { |
8f076531 | 603 | qp_attr->qp_access_flags = 0; |
c8f6a362 SH |
604 | *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS; |
605 | } else | |
606 | ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr, | |
607 | qp_attr_mask); | |
07ebafba | 608 | break; |
e51060f0 SH |
609 | default: |
610 | ret = -ENOSYS; | |
611 | break; | |
612 | } | |
613 | ||
614 | return ret; | |
615 | } | |
616 | EXPORT_SYMBOL(rdma_init_qp_attr); | |
617 | ||
618 | static inline int cma_zero_addr(struct sockaddr *addr) | |
619 | { | |
620 | struct in6_addr *ip6; | |
621 | ||
622 | if (addr->sa_family == AF_INET) | |
6360a02a JP |
623 | return ipv4_is_zeronet( |
624 | ((struct sockaddr_in *)addr)->sin_addr.s_addr); | |
e51060f0 SH |
625 | else { |
626 | ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr; | |
627 | return (ip6->s6_addr32[0] | ip6->s6_addr32[1] | | |
5fd571cb | 628 | ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0; |
e51060f0 SH |
629 | } |
630 | } | |
631 | ||
632 | static inline int cma_loopback_addr(struct sockaddr *addr) | |
633 | { | |
1f5175ad AS |
634 | if (addr->sa_family == AF_INET) |
635 | return ipv4_is_loopback( | |
636 | ((struct sockaddr_in *) addr)->sin_addr.s_addr); | |
637 | else | |
638 | return ipv6_addr_loopback( | |
639 | &((struct sockaddr_in6 *) addr)->sin6_addr); | |
e51060f0 SH |
640 | } |
641 | ||
642 | static inline int cma_any_addr(struct sockaddr *addr) | |
643 | { | |
644 | return cma_zero_addr(addr) || cma_loopback_addr(addr); | |
645 | } | |
646 | ||
628e5f6d SH |
647 | static inline __be16 cma_port(struct sockaddr *addr) |
648 | { | |
649 | if (addr->sa_family == AF_INET) | |
650 | return ((struct sockaddr_in *) addr)->sin_port; | |
651 | else | |
652 | return ((struct sockaddr_in6 *) addr)->sin6_port; | |
653 | } | |
654 | ||
e51060f0 SH |
655 | static inline int cma_any_port(struct sockaddr *addr) |
656 | { | |
628e5f6d | 657 | return !cma_port(addr); |
e51060f0 SH |
658 | } |
659 | ||
660 | static int cma_get_net_info(void *hdr, enum rdma_port_space ps, | |
1b90c137 | 661 | u8 *ip_ver, __be16 *port, |
e51060f0 SH |
662 | union cma_ip_addr **src, union cma_ip_addr **dst) |
663 | { | |
664 | switch (ps) { | |
665 | case RDMA_PS_SDP: | |
666 | if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) != | |
667 | SDP_MAJ_VERSION) | |
668 | return -EINVAL; | |
669 | ||
670 | *ip_ver = sdp_get_ip_ver(hdr); | |
671 | *port = ((struct sdp_hh *) hdr)->port; | |
672 | *src = &((struct sdp_hh *) hdr)->src_addr; | |
673 | *dst = &((struct sdp_hh *) hdr)->dst_addr; | |
674 | break; | |
675 | default: | |
676 | if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION) | |
677 | return -EINVAL; | |
678 | ||
679 | *ip_ver = cma_get_ip_ver(hdr); | |
680 | *port = ((struct cma_hdr *) hdr)->port; | |
681 | *src = &((struct cma_hdr *) hdr)->src_addr; | |
682 | *dst = &((struct cma_hdr *) hdr)->dst_addr; | |
683 | break; | |
684 | } | |
685 | ||
686 | if (*ip_ver != 4 && *ip_ver != 6) | |
687 | return -EINVAL; | |
688 | return 0; | |
689 | } | |
690 | ||
691 | static void cma_save_net_info(struct rdma_addr *addr, | |
692 | struct rdma_addr *listen_addr, | |
1b90c137 | 693 | u8 ip_ver, __be16 port, |
e51060f0 SH |
694 | union cma_ip_addr *src, union cma_ip_addr *dst) |
695 | { | |
696 | struct sockaddr_in *listen4, *ip4; | |
697 | struct sockaddr_in6 *listen6, *ip6; | |
698 | ||
699 | switch (ip_ver) { | |
700 | case 4: | |
701 | listen4 = (struct sockaddr_in *) &listen_addr->src_addr; | |
702 | ip4 = (struct sockaddr_in *) &addr->src_addr; | |
703 | ip4->sin_family = listen4->sin_family; | |
704 | ip4->sin_addr.s_addr = dst->ip4.addr; | |
705 | ip4->sin_port = listen4->sin_port; | |
706 | ||
707 | ip4 = (struct sockaddr_in *) &addr->dst_addr; | |
708 | ip4->sin_family = listen4->sin_family; | |
709 | ip4->sin_addr.s_addr = src->ip4.addr; | |
710 | ip4->sin_port = port; | |
711 | break; | |
712 | case 6: | |
713 | listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr; | |
714 | ip6 = (struct sockaddr_in6 *) &addr->src_addr; | |
715 | ip6->sin6_family = listen6->sin6_family; | |
716 | ip6->sin6_addr = dst->ip6; | |
717 | ip6->sin6_port = listen6->sin6_port; | |
718 | ||
719 | ip6 = (struct sockaddr_in6 *) &addr->dst_addr; | |
720 | ip6->sin6_family = listen6->sin6_family; | |
721 | ip6->sin6_addr = src->ip6; | |
722 | ip6->sin6_port = port; | |
723 | break; | |
724 | default: | |
725 | break; | |
726 | } | |
727 | } | |
728 | ||
729 | static inline int cma_user_data_offset(enum rdma_port_space ps) | |
730 | { | |
731 | switch (ps) { | |
732 | case RDMA_PS_SDP: | |
733 | return 0; | |
734 | default: | |
735 | return sizeof(struct cma_hdr); | |
736 | } | |
737 | } | |
738 | ||
e51060f0 SH |
739 | static void cma_cancel_route(struct rdma_id_private *id_priv) |
740 | { | |
07ebafba TT |
741 | switch (rdma_node_get_transport(id_priv->id.device->node_type)) { |
742 | case RDMA_TRANSPORT_IB: | |
e51060f0 SH |
743 | if (id_priv->query) |
744 | ib_sa_cancel_query(id_priv->query_id, id_priv->query); | |
745 | break; | |
746 | default: | |
747 | break; | |
748 | } | |
749 | } | |
750 | ||
e51060f0 SH |
751 | static void cma_cancel_listens(struct rdma_id_private *id_priv) |
752 | { | |
753 | struct rdma_id_private *dev_id_priv; | |
754 | ||
d02d1f53 SH |
755 | /* |
756 | * Remove from listen_any_list to prevent added devices from spawning | |
757 | * additional listen requests. | |
758 | */ | |
e51060f0 SH |
759 | mutex_lock(&lock); |
760 | list_del(&id_priv->list); | |
761 | ||
762 | while (!list_empty(&id_priv->listen_list)) { | |
763 | dev_id_priv = list_entry(id_priv->listen_list.next, | |
764 | struct rdma_id_private, listen_list); | |
d02d1f53 SH |
765 | /* sync with device removal to avoid duplicate destruction */ |
766 | list_del_init(&dev_id_priv->list); | |
767 | list_del(&dev_id_priv->listen_list); | |
768 | mutex_unlock(&lock); | |
769 | ||
770 | rdma_destroy_id(&dev_id_priv->id); | |
771 | mutex_lock(&lock); | |
e51060f0 SH |
772 | } |
773 | mutex_unlock(&lock); | |
774 | } | |
775 | ||
776 | static void cma_cancel_operation(struct rdma_id_private *id_priv, | |
777 | enum cma_state state) | |
778 | { | |
779 | switch (state) { | |
780 | case CMA_ADDR_QUERY: | |
781 | rdma_addr_cancel(&id_priv->id.route.addr.dev_addr); | |
782 | break; | |
783 | case CMA_ROUTE_QUERY: | |
784 | cma_cancel_route(id_priv); | |
785 | break; | |
786 | case CMA_LISTEN: | |
3f446754 RD |
787 | if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr) |
788 | && !id_priv->cma_dev) | |
e51060f0 SH |
789 | cma_cancel_listens(id_priv); |
790 | break; | |
791 | default: | |
792 | break; | |
793 | } | |
794 | } | |
795 | ||
796 | static void cma_release_port(struct rdma_id_private *id_priv) | |
797 | { | |
798 | struct rdma_bind_list *bind_list = id_priv->bind_list; | |
799 | ||
800 | if (!bind_list) | |
801 | return; | |
802 | ||
803 | mutex_lock(&lock); | |
804 | hlist_del(&id_priv->node); | |
805 | if (hlist_empty(&bind_list->owners)) { | |
806 | idr_remove(bind_list->ps, bind_list->port); | |
807 | kfree(bind_list); | |
808 | } | |
809 | mutex_unlock(&lock); | |
810 | } | |
811 | ||
c8f6a362 SH |
812 | static void cma_leave_mc_groups(struct rdma_id_private *id_priv) |
813 | { | |
814 | struct cma_multicast *mc; | |
815 | ||
816 | while (!list_empty(&id_priv->mc_list)) { | |
817 | mc = container_of(id_priv->mc_list.next, | |
818 | struct cma_multicast, list); | |
819 | list_del(&mc->list); | |
820 | ib_sa_free_multicast(mc->multicast.ib); | |
821 | kfree(mc); | |
822 | } | |
823 | } | |
824 | ||
e51060f0 SH |
825 | void rdma_destroy_id(struct rdma_cm_id *id) |
826 | { | |
827 | struct rdma_id_private *id_priv; | |
828 | enum cma_state state; | |
829 | ||
830 | id_priv = container_of(id, struct rdma_id_private, id); | |
831 | state = cma_exch(id_priv, CMA_DESTROYING); | |
832 | cma_cancel_operation(id_priv, state); | |
833 | ||
61a73c70 | 834 | mutex_lock(&lock); |
e51060f0 | 835 | if (id_priv->cma_dev) { |
61a73c70 | 836 | mutex_unlock(&lock); |
07ebafba TT |
837 | switch (rdma_node_get_transport(id->device->node_type)) { |
838 | case RDMA_TRANSPORT_IB: | |
3cd96564 | 839 | if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib)) |
e51060f0 SH |
840 | ib_destroy_cm_id(id_priv->cm_id.ib); |
841 | break; | |
07ebafba TT |
842 | case RDMA_TRANSPORT_IWARP: |
843 | if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw)) | |
844 | iw_destroy_cm_id(id_priv->cm_id.iw); | |
845 | break; | |
e51060f0 SH |
846 | default: |
847 | break; | |
848 | } | |
c8f6a362 | 849 | cma_leave_mc_groups(id_priv); |
3cd96564 | 850 | mutex_lock(&lock); |
e51060f0 | 851 | cma_detach_from_dev(id_priv); |
e51060f0 | 852 | } |
61a73c70 | 853 | mutex_unlock(&lock); |
e51060f0 SH |
854 | |
855 | cma_release_port(id_priv); | |
856 | cma_deref_id(id_priv); | |
857 | wait_for_completion(&id_priv->comp); | |
858 | ||
d02d1f53 SH |
859 | if (id_priv->internal_id) |
860 | cma_deref_id(id_priv->id.context); | |
861 | ||
e51060f0 SH |
862 | kfree(id_priv->id.route.path_rec); |
863 | kfree(id_priv); | |
864 | } | |
865 | EXPORT_SYMBOL(rdma_destroy_id); | |
866 | ||
867 | static int cma_rep_recv(struct rdma_id_private *id_priv) | |
868 | { | |
869 | int ret; | |
870 | ||
5851bb89 | 871 | ret = cma_modify_qp_rtr(id_priv, NULL); |
e51060f0 SH |
872 | if (ret) |
873 | goto reject; | |
874 | ||
5851bb89 | 875 | ret = cma_modify_qp_rts(id_priv, NULL); |
e51060f0 SH |
876 | if (ret) |
877 | goto reject; | |
878 | ||
879 | ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0); | |
880 | if (ret) | |
881 | goto reject; | |
882 | ||
883 | return 0; | |
884 | reject: | |
c5483388 | 885 | cma_modify_qp_err(id_priv); |
e51060f0 SH |
886 | ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED, |
887 | NULL, 0, NULL, 0); | |
888 | return ret; | |
889 | } | |
890 | ||
891 | static int cma_verify_rep(struct rdma_id_private *id_priv, void *data) | |
892 | { | |
893 | if (id_priv->id.ps == RDMA_PS_SDP && | |
894 | sdp_get_majv(((struct sdp_hah *) data)->sdp_version) != | |
895 | SDP_MAJ_VERSION) | |
896 | return -EINVAL; | |
897 | ||
898 | return 0; | |
899 | } | |
900 | ||
a1b1b61f SH |
901 | static void cma_set_rep_event_data(struct rdma_cm_event *event, |
902 | struct ib_cm_rep_event_param *rep_data, | |
903 | void *private_data) | |
904 | { | |
905 | event->param.conn.private_data = private_data; | |
906 | event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE; | |
907 | event->param.conn.responder_resources = rep_data->responder_resources; | |
908 | event->param.conn.initiator_depth = rep_data->initiator_depth; | |
909 | event->param.conn.flow_control = rep_data->flow_control; | |
910 | event->param.conn.rnr_retry_count = rep_data->rnr_retry_count; | |
911 | event->param.conn.srq = rep_data->srq; | |
912 | event->param.conn.qp_num = rep_data->remote_qpn; | |
913 | } | |
914 | ||
e51060f0 SH |
915 | static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) |
916 | { | |
917 | struct rdma_id_private *id_priv = cm_id->context; | |
a1b1b61f SH |
918 | struct rdma_cm_event event; |
919 | int ret = 0; | |
e51060f0 | 920 | |
38ca83a5 AV |
921 | if ((ib_event->event != IB_CM_TIMEWAIT_EXIT && |
922 | cma_disable_callback(id_priv, CMA_CONNECT)) || | |
923 | (ib_event->event == IB_CM_TIMEWAIT_EXIT && | |
924 | cma_disable_callback(id_priv, CMA_DISCONNECT))) | |
8aa08602 | 925 | return 0; |
e51060f0 | 926 | |
a1b1b61f | 927 | memset(&event, 0, sizeof event); |
e51060f0 SH |
928 | switch (ib_event->event) { |
929 | case IB_CM_REQ_ERROR: | |
930 | case IB_CM_REP_ERROR: | |
a1b1b61f SH |
931 | event.event = RDMA_CM_EVENT_UNREACHABLE; |
932 | event.status = -ETIMEDOUT; | |
e51060f0 SH |
933 | break; |
934 | case IB_CM_REP_RECEIVED: | |
a1b1b61f SH |
935 | event.status = cma_verify_rep(id_priv, ib_event->private_data); |
936 | if (event.status) | |
937 | event.event = RDMA_CM_EVENT_CONNECT_ERROR; | |
e51060f0 | 938 | else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) { |
a1b1b61f SH |
939 | event.status = cma_rep_recv(id_priv); |
940 | event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR : | |
941 | RDMA_CM_EVENT_ESTABLISHED; | |
e51060f0 | 942 | } else |
a1b1b61f SH |
943 | event.event = RDMA_CM_EVENT_CONNECT_RESPONSE; |
944 | cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd, | |
945 | ib_event->private_data); | |
e51060f0 SH |
946 | break; |
947 | case IB_CM_RTU_RECEIVED: | |
0fe313b0 SH |
948 | case IB_CM_USER_ESTABLISHED: |
949 | event.event = RDMA_CM_EVENT_ESTABLISHED; | |
e51060f0 SH |
950 | break; |
951 | case IB_CM_DREQ_ERROR: | |
a1b1b61f | 952 | event.status = -ETIMEDOUT; /* fall through */ |
e51060f0 SH |
953 | case IB_CM_DREQ_RECEIVED: |
954 | case IB_CM_DREP_RECEIVED: | |
955 | if (!cma_comp_exch(id_priv, CMA_CONNECT, CMA_DISCONNECT)) | |
956 | goto out; | |
a1b1b61f | 957 | event.event = RDMA_CM_EVENT_DISCONNECTED; |
e51060f0 SH |
958 | break; |
959 | case IB_CM_TIMEWAIT_EXIT: | |
38ca83a5 AV |
960 | event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT; |
961 | break; | |
e51060f0 SH |
962 | case IB_CM_MRA_RECEIVED: |
963 | /* ignore event */ | |
964 | goto out; | |
965 | case IB_CM_REJ_RECEIVED: | |
c5483388 | 966 | cma_modify_qp_err(id_priv); |
a1b1b61f SH |
967 | event.status = ib_event->param.rej_rcvd.reason; |
968 | event.event = RDMA_CM_EVENT_REJECTED; | |
969 | event.param.conn.private_data = ib_event->private_data; | |
970 | event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; | |
e51060f0 SH |
971 | break; |
972 | default: | |
468f2239 | 973 | printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n", |
e51060f0 SH |
974 | ib_event->event); |
975 | goto out; | |
976 | } | |
977 | ||
a1b1b61f | 978 | ret = id_priv->id.event_handler(&id_priv->id, &event); |
e51060f0 SH |
979 | if (ret) { |
980 | /* Destroy the CM ID by returning a non-zero value. */ | |
981 | id_priv->cm_id.ib = NULL; | |
982 | cma_exch(id_priv, CMA_DESTROYING); | |
de910bd9 | 983 | mutex_unlock(&id_priv->handler_mutex); |
e51060f0 SH |
984 | rdma_destroy_id(&id_priv->id); |
985 | return ret; | |
986 | } | |
987 | out: | |
de910bd9 | 988 | mutex_unlock(&id_priv->handler_mutex); |
e51060f0 SH |
989 | return ret; |
990 | } | |
991 | ||
628e5f6d SH |
992 | static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id, |
993 | struct ib_cm_event *ib_event) | |
e51060f0 SH |
994 | { |
995 | struct rdma_id_private *id_priv; | |
996 | struct rdma_cm_id *id; | |
997 | struct rdma_route *rt; | |
998 | union cma_ip_addr *src, *dst; | |
1b90c137 | 999 | __be16 port; |
e51060f0 | 1000 | u8 ip_ver; |
64c5e613 | 1001 | int ret; |
e51060f0 | 1002 | |
3f168d2b KK |
1003 | if (cma_get_net_info(ib_event->private_data, listen_id->ps, |
1004 | &ip_ver, &port, &src, &dst)) | |
1005 | goto err; | |
1006 | ||
e51060f0 SH |
1007 | id = rdma_create_id(listen_id->event_handler, listen_id->context, |
1008 | listen_id->ps); | |
1009 | if (IS_ERR(id)) | |
3f168d2b KK |
1010 | goto err; |
1011 | ||
1012 | cma_save_net_info(&id->route.addr, &listen_id->route.addr, | |
1013 | ip_ver, port, src, dst); | |
e51060f0 SH |
1014 | |
1015 | rt = &id->route; | |
1016 | rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1; | |
3f168d2b KK |
1017 | rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths, |
1018 | GFP_KERNEL); | |
e51060f0 | 1019 | if (!rt->path_rec) |
3f168d2b | 1020 | goto destroy_id; |
e51060f0 | 1021 | |
e51060f0 SH |
1022 | rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path; |
1023 | if (rt->num_paths == 2) | |
1024 | rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path; | |
1025 | ||
6f8372b6 SH |
1026 | if (cma_any_addr((struct sockaddr *) &rt->addr.src_addr)) { |
1027 | rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND; | |
1028 | rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid); | |
1029 | ib_addr_set_pkey(&rt->addr.dev_addr, rt->path_rec[0].pkey); | |
1030 | } else { | |
1031 | ret = rdma_translate_ip((struct sockaddr *) &rt->addr.src_addr, | |
1032 | &rt->addr.dev_addr); | |
1033 | if (ret) | |
1034 | goto destroy_id; | |
1035 | } | |
1036 | rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid); | |
e51060f0 SH |
1037 | |
1038 | id_priv = container_of(id, struct rdma_id_private, id); | |
1039 | id_priv->state = CMA_CONNECT; | |
1040 | return id_priv; | |
3f168d2b KK |
1041 | |
1042 | destroy_id: | |
e51060f0 | 1043 | rdma_destroy_id(id); |
3f168d2b | 1044 | err: |
e51060f0 SH |
1045 | return NULL; |
1046 | } | |
1047 | ||
628e5f6d SH |
1048 | static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id, |
1049 | struct ib_cm_event *ib_event) | |
1050 | { | |
1051 | struct rdma_id_private *id_priv; | |
1052 | struct rdma_cm_id *id; | |
1053 | union cma_ip_addr *src, *dst; | |
1b90c137 | 1054 | __be16 port; |
628e5f6d SH |
1055 | u8 ip_ver; |
1056 | int ret; | |
1057 | ||
1058 | id = rdma_create_id(listen_id->event_handler, listen_id->context, | |
1059 | listen_id->ps); | |
1060 | if (IS_ERR(id)) | |
1061 | return NULL; | |
1062 | ||
1063 | ||
1064 | if (cma_get_net_info(ib_event->private_data, listen_id->ps, | |
1065 | &ip_ver, &port, &src, &dst)) | |
1066 | goto err; | |
1067 | ||
1068 | cma_save_net_info(&id->route.addr, &listen_id->route.addr, | |
1069 | ip_ver, port, src, dst); | |
1070 | ||
6f8372b6 SH |
1071 | if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) { |
1072 | ret = rdma_translate_ip((struct sockaddr *) &id->route.addr.src_addr, | |
1073 | &id->route.addr.dev_addr); | |
1074 | if (ret) | |
1075 | goto err; | |
1076 | } | |
628e5f6d SH |
1077 | |
1078 | id_priv = container_of(id, struct rdma_id_private, id); | |
1079 | id_priv->state = CMA_CONNECT; | |
1080 | return id_priv; | |
1081 | err: | |
1082 | rdma_destroy_id(id); | |
1083 | return NULL; | |
1084 | } | |
1085 | ||
a1b1b61f SH |
1086 | static void cma_set_req_event_data(struct rdma_cm_event *event, |
1087 | struct ib_cm_req_event_param *req_data, | |
1088 | void *private_data, int offset) | |
1089 | { | |
1090 | event->param.conn.private_data = private_data + offset; | |
1091 | event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset; | |
1092 | event->param.conn.responder_resources = req_data->responder_resources; | |
1093 | event->param.conn.initiator_depth = req_data->initiator_depth; | |
1094 | event->param.conn.flow_control = req_data->flow_control; | |
1095 | event->param.conn.retry_count = req_data->retry_count; | |
1096 | event->param.conn.rnr_retry_count = req_data->rnr_retry_count; | |
1097 | event->param.conn.srq = req_data->srq; | |
1098 | event->param.conn.qp_num = req_data->remote_qpn; | |
1099 | } | |
1100 | ||
e51060f0 SH |
1101 | static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) |
1102 | { | |
1103 | struct rdma_id_private *listen_id, *conn_id; | |
a1b1b61f | 1104 | struct rdma_cm_event event; |
e51060f0 SH |
1105 | int offset, ret; |
1106 | ||
1107 | listen_id = cm_id->context; | |
de910bd9 | 1108 | if (cma_disable_callback(listen_id, CMA_LISTEN)) |
8aa08602 | 1109 | return -ECONNABORTED; |
e51060f0 | 1110 | |
628e5f6d SH |
1111 | memset(&event, 0, sizeof event); |
1112 | offset = cma_user_data_offset(listen_id->id.ps); | |
1113 | event.event = RDMA_CM_EVENT_CONNECT_REQUEST; | |
c8f6a362 | 1114 | if (cma_is_ud_ps(listen_id->id.ps)) { |
628e5f6d SH |
1115 | conn_id = cma_new_udp_id(&listen_id->id, ib_event); |
1116 | event.param.ud.private_data = ib_event->private_data + offset; | |
1117 | event.param.ud.private_data_len = | |
1118 | IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset; | |
1119 | } else { | |
1120 | conn_id = cma_new_conn_id(&listen_id->id, ib_event); | |
1121 | cma_set_req_event_data(&event, &ib_event->param.req_rcvd, | |
1122 | ib_event->private_data, offset); | |
1123 | } | |
e51060f0 SH |
1124 | if (!conn_id) { |
1125 | ret = -ENOMEM; | |
1126 | goto out; | |
1127 | } | |
1128 | ||
de910bd9 | 1129 | mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING); |
61a73c70 | 1130 | mutex_lock(&lock); |
07ebafba | 1131 | ret = cma_acquire_dev(conn_id); |
61a73c70 | 1132 | mutex_unlock(&lock); |
a1a733f6 KK |
1133 | if (ret) |
1134 | goto release_conn_id; | |
e51060f0 SH |
1135 | |
1136 | conn_id->cm_id.ib = cm_id; | |
1137 | cm_id->context = conn_id; | |
1138 | cm_id->cm_handler = cma_ib_handler; | |
1139 | ||
a1b1b61f | 1140 | ret = conn_id->id.event_handler(&conn_id->id, &event); |
45d9478d | 1141 | if (!ret) { |
ead595ae SH |
1142 | /* |
1143 | * Acquire mutex to prevent user executing rdma_destroy_id() | |
1144 | * while we're accessing the cm_id. | |
1145 | */ | |
1146 | mutex_lock(&lock); | |
1147 | if (cma_comp(conn_id, CMA_CONNECT) && | |
1148 | !cma_is_ud_ps(conn_id->id.ps)) | |
1149 | ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0); | |
1150 | mutex_unlock(&lock); | |
de910bd9 | 1151 | mutex_unlock(&conn_id->handler_mutex); |
a1a733f6 | 1152 | goto out; |
45d9478d | 1153 | } |
a1a733f6 KK |
1154 | |
1155 | /* Destroy the CM ID by returning a non-zero value. */ | |
1156 | conn_id->cm_id.ib = NULL; | |
1157 | ||
1158 | release_conn_id: | |
1159 | cma_exch(conn_id, CMA_DESTROYING); | |
de910bd9 | 1160 | mutex_unlock(&conn_id->handler_mutex); |
a1a733f6 KK |
1161 | rdma_destroy_id(&conn_id->id); |
1162 | ||
e51060f0 | 1163 | out: |
de910bd9 | 1164 | mutex_unlock(&listen_id->handler_mutex); |
e51060f0 SH |
1165 | return ret; |
1166 | } | |
1167 | ||
1168 | static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr) | |
1169 | { | |
628e5f6d | 1170 | return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr))); |
e51060f0 SH |
1171 | } |
1172 | ||
1173 | static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr, | |
1174 | struct ib_cm_compare_data *compare) | |
1175 | { | |
1176 | struct cma_hdr *cma_data, *cma_mask; | |
1177 | struct sdp_hh *sdp_data, *sdp_mask; | |
1b90c137 | 1178 | __be32 ip4_addr; |
e51060f0 SH |
1179 | struct in6_addr ip6_addr; |
1180 | ||
1181 | memset(compare, 0, sizeof *compare); | |
1182 | cma_data = (void *) compare->data; | |
1183 | cma_mask = (void *) compare->mask; | |
1184 | sdp_data = (void *) compare->data; | |
1185 | sdp_mask = (void *) compare->mask; | |
1186 | ||
1187 | switch (addr->sa_family) { | |
1188 | case AF_INET: | |
1189 | ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr; | |
1190 | if (ps == RDMA_PS_SDP) { | |
1191 | sdp_set_ip_ver(sdp_data, 4); | |
1192 | sdp_set_ip_ver(sdp_mask, 0xF); | |
1193 | sdp_data->dst_addr.ip4.addr = ip4_addr; | |
1b90c137 | 1194 | sdp_mask->dst_addr.ip4.addr = htonl(~0); |
e51060f0 SH |
1195 | } else { |
1196 | cma_set_ip_ver(cma_data, 4); | |
1197 | cma_set_ip_ver(cma_mask, 0xF); | |
1198 | cma_data->dst_addr.ip4.addr = ip4_addr; | |
1b90c137 | 1199 | cma_mask->dst_addr.ip4.addr = htonl(~0); |
e51060f0 SH |
1200 | } |
1201 | break; | |
1202 | case AF_INET6: | |
1203 | ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr; | |
1204 | if (ps == RDMA_PS_SDP) { | |
1205 | sdp_set_ip_ver(sdp_data, 6); | |
1206 | sdp_set_ip_ver(sdp_mask, 0xF); | |
1207 | sdp_data->dst_addr.ip6 = ip6_addr; | |
1208 | memset(&sdp_mask->dst_addr.ip6, 0xFF, | |
1209 | sizeof sdp_mask->dst_addr.ip6); | |
1210 | } else { | |
1211 | cma_set_ip_ver(cma_data, 6); | |
1212 | cma_set_ip_ver(cma_mask, 0xF); | |
1213 | cma_data->dst_addr.ip6 = ip6_addr; | |
1214 | memset(&cma_mask->dst_addr.ip6, 0xFF, | |
1215 | sizeof cma_mask->dst_addr.ip6); | |
1216 | } | |
1217 | break; | |
1218 | default: | |
1219 | break; | |
1220 | } | |
1221 | } | |
1222 | ||
07ebafba TT |
1223 | static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event) |
1224 | { | |
1225 | struct rdma_id_private *id_priv = iw_id->context; | |
a1b1b61f | 1226 | struct rdma_cm_event event; |
07ebafba TT |
1227 | struct sockaddr_in *sin; |
1228 | int ret = 0; | |
1229 | ||
de910bd9 | 1230 | if (cma_disable_callback(id_priv, CMA_CONNECT)) |
be65f086 | 1231 | return 0; |
07ebafba | 1232 | |
be65f086 | 1233 | memset(&event, 0, sizeof event); |
07ebafba TT |
1234 | switch (iw_event->event) { |
1235 | case IW_CM_EVENT_CLOSE: | |
a1b1b61f | 1236 | event.event = RDMA_CM_EVENT_DISCONNECTED; |
07ebafba TT |
1237 | break; |
1238 | case IW_CM_EVENT_CONNECT_REPLY: | |
1239 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; | |
1240 | *sin = iw_event->local_addr; | |
1241 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr; | |
1242 | *sin = iw_event->remote_addr; | |
881a045f SW |
1243 | switch (iw_event->status) { |
1244 | case 0: | |
a1b1b61f | 1245 | event.event = RDMA_CM_EVENT_ESTABLISHED; |
881a045f SW |
1246 | break; |
1247 | case -ECONNRESET: | |
1248 | case -ECONNREFUSED: | |
1249 | event.event = RDMA_CM_EVENT_REJECTED; | |
1250 | break; | |
1251 | case -ETIMEDOUT: | |
1252 | event.event = RDMA_CM_EVENT_UNREACHABLE; | |
1253 | break; | |
1254 | default: | |
1255 | event.event = RDMA_CM_EVENT_CONNECT_ERROR; | |
1256 | break; | |
1257 | } | |
07ebafba TT |
1258 | break; |
1259 | case IW_CM_EVENT_ESTABLISHED: | |
a1b1b61f | 1260 | event.event = RDMA_CM_EVENT_ESTABLISHED; |
07ebafba TT |
1261 | break; |
1262 | default: | |
1263 | BUG_ON(1); | |
1264 | } | |
1265 | ||
a1b1b61f SH |
1266 | event.status = iw_event->status; |
1267 | event.param.conn.private_data = iw_event->private_data; | |
1268 | event.param.conn.private_data_len = iw_event->private_data_len; | |
1269 | ret = id_priv->id.event_handler(&id_priv->id, &event); | |
07ebafba TT |
1270 | if (ret) { |
1271 | /* Destroy the CM ID by returning a non-zero value. */ | |
1272 | id_priv->cm_id.iw = NULL; | |
1273 | cma_exch(id_priv, CMA_DESTROYING); | |
de910bd9 | 1274 | mutex_unlock(&id_priv->handler_mutex); |
07ebafba TT |
1275 | rdma_destroy_id(&id_priv->id); |
1276 | return ret; | |
1277 | } | |
1278 | ||
de910bd9 | 1279 | mutex_unlock(&id_priv->handler_mutex); |
07ebafba TT |
1280 | return ret; |
1281 | } | |
1282 | ||
1283 | static int iw_conn_req_handler(struct iw_cm_id *cm_id, | |
1284 | struct iw_cm_event *iw_event) | |
1285 | { | |
1286 | struct rdma_cm_id *new_cm_id; | |
1287 | struct rdma_id_private *listen_id, *conn_id; | |
1288 | struct sockaddr_in *sin; | |
1289 | struct net_device *dev = NULL; | |
a1b1b61f | 1290 | struct rdma_cm_event event; |
07ebafba | 1291 | int ret; |
8d8293cf | 1292 | struct ib_device_attr attr; |
07ebafba TT |
1293 | |
1294 | listen_id = cm_id->context; | |
de910bd9 | 1295 | if (cma_disable_callback(listen_id, CMA_LISTEN)) |
8aa08602 | 1296 | return -ECONNABORTED; |
07ebafba TT |
1297 | |
1298 | /* Create a new RDMA id for the new IW CM ID */ | |
1299 | new_cm_id = rdma_create_id(listen_id->id.event_handler, | |
1300 | listen_id->id.context, | |
1301 | RDMA_PS_TCP); | |
10f32065 | 1302 | if (IS_ERR(new_cm_id)) { |
07ebafba TT |
1303 | ret = -ENOMEM; |
1304 | goto out; | |
1305 | } | |
1306 | conn_id = container_of(new_cm_id, struct rdma_id_private, id); | |
de910bd9 | 1307 | mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING); |
07ebafba TT |
1308 | conn_id->state = CMA_CONNECT; |
1309 | ||
1ab35276 | 1310 | dev = ip_dev_find(&init_net, iw_event->local_addr.sin_addr.s_addr); |
07ebafba TT |
1311 | if (!dev) { |
1312 | ret = -EADDRNOTAVAIL; | |
de910bd9 | 1313 | mutex_unlock(&conn_id->handler_mutex); |
07ebafba TT |
1314 | rdma_destroy_id(new_cm_id); |
1315 | goto out; | |
1316 | } | |
1317 | ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL); | |
1318 | if (ret) { | |
de910bd9 | 1319 | mutex_unlock(&conn_id->handler_mutex); |
07ebafba TT |
1320 | rdma_destroy_id(new_cm_id); |
1321 | goto out; | |
1322 | } | |
1323 | ||
61a73c70 | 1324 | mutex_lock(&lock); |
07ebafba | 1325 | ret = cma_acquire_dev(conn_id); |
61a73c70 | 1326 | mutex_unlock(&lock); |
07ebafba | 1327 | if (ret) { |
de910bd9 | 1328 | mutex_unlock(&conn_id->handler_mutex); |
07ebafba TT |
1329 | rdma_destroy_id(new_cm_id); |
1330 | goto out; | |
1331 | } | |
1332 | ||
1333 | conn_id->cm_id.iw = cm_id; | |
1334 | cm_id->context = conn_id; | |
1335 | cm_id->cm_handler = cma_iw_handler; | |
1336 | ||
1337 | sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr; | |
1338 | *sin = iw_event->local_addr; | |
1339 | sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr; | |
1340 | *sin = iw_event->remote_addr; | |
1341 | ||
8d8293cf SW |
1342 | ret = ib_query_device(conn_id->id.device, &attr); |
1343 | if (ret) { | |
de910bd9 | 1344 | mutex_unlock(&conn_id->handler_mutex); |
8d8293cf SW |
1345 | rdma_destroy_id(new_cm_id); |
1346 | goto out; | |
1347 | } | |
1348 | ||
a1b1b61f SH |
1349 | memset(&event, 0, sizeof event); |
1350 | event.event = RDMA_CM_EVENT_CONNECT_REQUEST; | |
1351 | event.param.conn.private_data = iw_event->private_data; | |
1352 | event.param.conn.private_data_len = iw_event->private_data_len; | |
8d8293cf SW |
1353 | event.param.conn.initiator_depth = attr.max_qp_init_rd_atom; |
1354 | event.param.conn.responder_resources = attr.max_qp_rd_atom; | |
a1b1b61f | 1355 | ret = conn_id->id.event_handler(&conn_id->id, &event); |
07ebafba TT |
1356 | if (ret) { |
1357 | /* User wants to destroy the CM ID */ | |
1358 | conn_id->cm_id.iw = NULL; | |
1359 | cma_exch(conn_id, CMA_DESTROYING); | |
de910bd9 | 1360 | mutex_unlock(&conn_id->handler_mutex); |
07ebafba | 1361 | rdma_destroy_id(&conn_id->id); |
de910bd9 | 1362 | goto out; |
07ebafba TT |
1363 | } |
1364 | ||
de910bd9 OG |
1365 | mutex_unlock(&conn_id->handler_mutex); |
1366 | ||
07ebafba TT |
1367 | out: |
1368 | if (dev) | |
1369 | dev_put(dev); | |
de910bd9 | 1370 | mutex_unlock(&listen_id->handler_mutex); |
07ebafba TT |
1371 | return ret; |
1372 | } | |
1373 | ||
e51060f0 SH |
1374 | static int cma_ib_listen(struct rdma_id_private *id_priv) |
1375 | { | |
1376 | struct ib_cm_compare_data compare_data; | |
1377 | struct sockaddr *addr; | |
1378 | __be64 svc_id; | |
1379 | int ret; | |
1380 | ||
1381 | id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_req_handler, | |
1382 | id_priv); | |
1383 | if (IS_ERR(id_priv->cm_id.ib)) | |
1384 | return PTR_ERR(id_priv->cm_id.ib); | |
1385 | ||
3f446754 | 1386 | addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr; |
e51060f0 SH |
1387 | svc_id = cma_get_service_id(id_priv->id.ps, addr); |
1388 | if (cma_any_addr(addr)) | |
1389 | ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL); | |
1390 | else { | |
1391 | cma_set_compare_data(id_priv->id.ps, addr, &compare_data); | |
1392 | ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data); | |
1393 | } | |
1394 | ||
1395 | if (ret) { | |
1396 | ib_destroy_cm_id(id_priv->cm_id.ib); | |
1397 | id_priv->cm_id.ib = NULL; | |
1398 | } | |
1399 | ||
1400 | return ret; | |
1401 | } | |
1402 | ||
07ebafba TT |
1403 | static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog) |
1404 | { | |
1405 | int ret; | |
1406 | struct sockaddr_in *sin; | |
1407 | ||
1408 | id_priv->cm_id.iw = iw_create_cm_id(id_priv->id.device, | |
1409 | iw_conn_req_handler, | |
1410 | id_priv); | |
1411 | if (IS_ERR(id_priv->cm_id.iw)) | |
1412 | return PTR_ERR(id_priv->cm_id.iw); | |
1413 | ||
1414 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; | |
1415 | id_priv->cm_id.iw->local_addr = *sin; | |
1416 | ||
1417 | ret = iw_cm_listen(id_priv->cm_id.iw, backlog); | |
1418 | ||
1419 | if (ret) { | |
1420 | iw_destroy_cm_id(id_priv->cm_id.iw); | |
1421 | id_priv->cm_id.iw = NULL; | |
1422 | } | |
1423 | ||
1424 | return ret; | |
1425 | } | |
1426 | ||
e51060f0 SH |
1427 | static int cma_listen_handler(struct rdma_cm_id *id, |
1428 | struct rdma_cm_event *event) | |
1429 | { | |
1430 | struct rdma_id_private *id_priv = id->context; | |
1431 | ||
1432 | id->context = id_priv->id.context; | |
1433 | id->event_handler = id_priv->id.event_handler; | |
1434 | return id_priv->id.event_handler(id, event); | |
1435 | } | |
1436 | ||
1437 | static void cma_listen_on_dev(struct rdma_id_private *id_priv, | |
1438 | struct cma_device *cma_dev) | |
1439 | { | |
1440 | struct rdma_id_private *dev_id_priv; | |
1441 | struct rdma_cm_id *id; | |
1442 | int ret; | |
1443 | ||
1444 | id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps); | |
1445 | if (IS_ERR(id)) | |
1446 | return; | |
1447 | ||
1448 | dev_id_priv = container_of(id, struct rdma_id_private, id); | |
1449 | ||
1450 | dev_id_priv->state = CMA_ADDR_BOUND; | |
1451 | memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr, | |
3f446754 | 1452 | ip_addr_size((struct sockaddr *) &id_priv->id.route.addr.src_addr)); |
e51060f0 SH |
1453 | |
1454 | cma_attach_to_dev(dev_id_priv, cma_dev); | |
1455 | list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list); | |
d02d1f53 SH |
1456 | atomic_inc(&id_priv->refcount); |
1457 | dev_id_priv->internal_id = 1; | |
e51060f0 SH |
1458 | |
1459 | ret = rdma_listen(id, id_priv->backlog); | |
1460 | if (ret) | |
d02d1f53 | 1461 | printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, " |
468f2239 | 1462 | "listening on device %s\n", ret, cma_dev->device->name); |
e51060f0 SH |
1463 | } |
1464 | ||
1465 | static void cma_listen_on_all(struct rdma_id_private *id_priv) | |
1466 | { | |
1467 | struct cma_device *cma_dev; | |
1468 | ||
1469 | mutex_lock(&lock); | |
1470 | list_add_tail(&id_priv->list, &listen_any_list); | |
1471 | list_for_each_entry(cma_dev, &dev_list, list) | |
1472 | cma_listen_on_dev(id_priv, cma_dev); | |
1473 | mutex_unlock(&lock); | |
1474 | } | |
1475 | ||
e51060f0 SH |
1476 | int rdma_listen(struct rdma_cm_id *id, int backlog) |
1477 | { | |
1478 | struct rdma_id_private *id_priv; | |
1479 | int ret; | |
1480 | ||
1481 | id_priv = container_of(id, struct rdma_id_private, id); | |
1482 | if (id_priv->state == CMA_IDLE) { | |
d14714df SH |
1483 | ((struct sockaddr *) &id->route.addr.src_addr)->sa_family = AF_INET; |
1484 | ret = rdma_bind_addr(id, (struct sockaddr *) &id->route.addr.src_addr); | |
e51060f0 SH |
1485 | if (ret) |
1486 | return ret; | |
1487 | } | |
1488 | ||
1489 | if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_LISTEN)) | |
1490 | return -EINVAL; | |
1491 | ||
1492 | id_priv->backlog = backlog; | |
1493 | if (id->device) { | |
07ebafba TT |
1494 | switch (rdma_node_get_transport(id->device->node_type)) { |
1495 | case RDMA_TRANSPORT_IB: | |
e51060f0 SH |
1496 | ret = cma_ib_listen(id_priv); |
1497 | if (ret) | |
1498 | goto err; | |
1499 | break; | |
07ebafba TT |
1500 | case RDMA_TRANSPORT_IWARP: |
1501 | ret = cma_iw_listen(id_priv, backlog); | |
1502 | if (ret) | |
1503 | goto err; | |
1504 | break; | |
e51060f0 SH |
1505 | default: |
1506 | ret = -ENOSYS; | |
1507 | goto err; | |
1508 | } | |
1509 | } else | |
1510 | cma_listen_on_all(id_priv); | |
1511 | ||
1512 | return 0; | |
1513 | err: | |
1514 | id_priv->backlog = 0; | |
1515 | cma_comp_exch(id_priv, CMA_LISTEN, CMA_ADDR_BOUND); | |
1516 | return ret; | |
1517 | } | |
1518 | EXPORT_SYMBOL(rdma_listen); | |
1519 | ||
a81c994d SH |
1520 | void rdma_set_service_type(struct rdma_cm_id *id, int tos) |
1521 | { | |
1522 | struct rdma_id_private *id_priv; | |
1523 | ||
1524 | id_priv = container_of(id, struct rdma_id_private, id); | |
1525 | id_priv->tos = (u8) tos; | |
1526 | } | |
1527 | EXPORT_SYMBOL(rdma_set_service_type); | |
1528 | ||
e51060f0 SH |
1529 | static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec, |
1530 | void *context) | |
1531 | { | |
1532 | struct cma_work *work = context; | |
1533 | struct rdma_route *route; | |
1534 | ||
1535 | route = &work->id->id.route; | |
1536 | ||
1537 | if (!status) { | |
1538 | route->num_paths = 1; | |
1539 | *route->path_rec = *path_rec; | |
1540 | } else { | |
1541 | work->old_state = CMA_ROUTE_QUERY; | |
1542 | work->new_state = CMA_ADDR_RESOLVED; | |
1543 | work->event.event = RDMA_CM_EVENT_ROUTE_ERROR; | |
8f0472d3 | 1544 | work->event.status = status; |
e51060f0 SH |
1545 | } |
1546 | ||
1547 | queue_work(cma_wq, &work->work); | |
1548 | } | |
1549 | ||
1550 | static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms, | |
1551 | struct cma_work *work) | |
1552 | { | |
a81c994d | 1553 | struct rdma_addr *addr = &id_priv->id.route.addr; |
e51060f0 | 1554 | struct ib_sa_path_rec path_rec; |
a81c994d SH |
1555 | ib_sa_comp_mask comp_mask; |
1556 | struct sockaddr_in6 *sin6; | |
e51060f0 SH |
1557 | |
1558 | memset(&path_rec, 0, sizeof path_rec); | |
6f8372b6 SH |
1559 | rdma_addr_get_sgid(&addr->dev_addr, &path_rec.sgid); |
1560 | rdma_addr_get_dgid(&addr->dev_addr, &path_rec.dgid); | |
a81c994d | 1561 | path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(&addr->dev_addr)); |
e51060f0 | 1562 | path_rec.numb_path = 1; |
962063e6 | 1563 | path_rec.reversible = 1; |
3f446754 RD |
1564 | path_rec.service_id = cma_get_service_id(id_priv->id.ps, |
1565 | (struct sockaddr *) &addr->dst_addr); | |
a81c994d SH |
1566 | |
1567 | comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID | | |
1568 | IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH | | |
1569 | IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID; | |
1570 | ||
3f446754 | 1571 | if (addr->src_addr.ss_family == AF_INET) { |
a81c994d SH |
1572 | path_rec.qos_class = cpu_to_be16((u16) id_priv->tos); |
1573 | comp_mask |= IB_SA_PATH_REC_QOS_CLASS; | |
1574 | } else { | |
1575 | sin6 = (struct sockaddr_in6 *) &addr->src_addr; | |
1576 | path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20); | |
1577 | comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS; | |
1578 | } | |
e51060f0 | 1579 | |
c1a0b23b | 1580 | id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device, |
a81c994d SH |
1581 | id_priv->id.port_num, &path_rec, |
1582 | comp_mask, timeout_ms, | |
1583 | GFP_KERNEL, cma_query_handler, | |
1584 | work, &id_priv->query); | |
e51060f0 SH |
1585 | |
1586 | return (id_priv->query_id < 0) ? id_priv->query_id : 0; | |
1587 | } | |
1588 | ||
c4028958 | 1589 | static void cma_work_handler(struct work_struct *_work) |
e51060f0 | 1590 | { |
c4028958 | 1591 | struct cma_work *work = container_of(_work, struct cma_work, work); |
e51060f0 SH |
1592 | struct rdma_id_private *id_priv = work->id; |
1593 | int destroy = 0; | |
1594 | ||
de910bd9 | 1595 | mutex_lock(&id_priv->handler_mutex); |
e51060f0 SH |
1596 | if (!cma_comp_exch(id_priv, work->old_state, work->new_state)) |
1597 | goto out; | |
1598 | ||
1599 | if (id_priv->id.event_handler(&id_priv->id, &work->event)) { | |
1600 | cma_exch(id_priv, CMA_DESTROYING); | |
1601 | destroy = 1; | |
1602 | } | |
1603 | out: | |
de910bd9 | 1604 | mutex_unlock(&id_priv->handler_mutex); |
e51060f0 SH |
1605 | cma_deref_id(id_priv); |
1606 | if (destroy) | |
1607 | rdma_destroy_id(&id_priv->id); | |
1608 | kfree(work); | |
1609 | } | |
1610 | ||
dd5bdff8 OG |
1611 | static void cma_ndev_work_handler(struct work_struct *_work) |
1612 | { | |
1613 | struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work); | |
1614 | struct rdma_id_private *id_priv = work->id; | |
1615 | int destroy = 0; | |
1616 | ||
1617 | mutex_lock(&id_priv->handler_mutex); | |
1618 | if (id_priv->state == CMA_DESTROYING || | |
1619 | id_priv->state == CMA_DEVICE_REMOVAL) | |
1620 | goto out; | |
1621 | ||
1622 | if (id_priv->id.event_handler(&id_priv->id, &work->event)) { | |
1623 | cma_exch(id_priv, CMA_DESTROYING); | |
1624 | destroy = 1; | |
1625 | } | |
1626 | ||
1627 | out: | |
1628 | mutex_unlock(&id_priv->handler_mutex); | |
1629 | cma_deref_id(id_priv); | |
1630 | if (destroy) | |
1631 | rdma_destroy_id(&id_priv->id); | |
1632 | kfree(work); | |
1633 | } | |
1634 | ||
e51060f0 SH |
1635 | static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms) |
1636 | { | |
1637 | struct rdma_route *route = &id_priv->id.route; | |
1638 | struct cma_work *work; | |
1639 | int ret; | |
1640 | ||
1641 | work = kzalloc(sizeof *work, GFP_KERNEL); | |
1642 | if (!work) | |
1643 | return -ENOMEM; | |
1644 | ||
1645 | work->id = id_priv; | |
c4028958 | 1646 | INIT_WORK(&work->work, cma_work_handler); |
e51060f0 SH |
1647 | work->old_state = CMA_ROUTE_QUERY; |
1648 | work->new_state = CMA_ROUTE_RESOLVED; | |
1649 | work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; | |
1650 | ||
1651 | route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL); | |
1652 | if (!route->path_rec) { | |
1653 | ret = -ENOMEM; | |
1654 | goto err1; | |
1655 | } | |
1656 | ||
1657 | ret = cma_query_ib_route(id_priv, timeout_ms, work); | |
1658 | if (ret) | |
1659 | goto err2; | |
1660 | ||
1661 | return 0; | |
1662 | err2: | |
1663 | kfree(route->path_rec); | |
1664 | route->path_rec = NULL; | |
1665 | err1: | |
1666 | kfree(work); | |
1667 | return ret; | |
1668 | } | |
1669 | ||
1670 | int rdma_set_ib_paths(struct rdma_cm_id *id, | |
1671 | struct ib_sa_path_rec *path_rec, int num_paths) | |
1672 | { | |
1673 | struct rdma_id_private *id_priv; | |
1674 | int ret; | |
1675 | ||
1676 | id_priv = container_of(id, struct rdma_id_private, id); | |
1677 | if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_RESOLVED)) | |
1678 | return -EINVAL; | |
1679 | ||
1680 | id->route.path_rec = kmalloc(sizeof *path_rec * num_paths, GFP_KERNEL); | |
1681 | if (!id->route.path_rec) { | |
1682 | ret = -ENOMEM; | |
1683 | goto err; | |
1684 | } | |
1685 | ||
1686 | memcpy(id->route.path_rec, path_rec, sizeof *path_rec * num_paths); | |
ae2d9293 | 1687 | id->route.num_paths = num_paths; |
e51060f0 SH |
1688 | return 0; |
1689 | err: | |
1690 | cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_ADDR_RESOLVED); | |
1691 | return ret; | |
1692 | } | |
1693 | EXPORT_SYMBOL(rdma_set_ib_paths); | |
1694 | ||
07ebafba TT |
1695 | static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms) |
1696 | { | |
1697 | struct cma_work *work; | |
1698 | ||
1699 | work = kzalloc(sizeof *work, GFP_KERNEL); | |
1700 | if (!work) | |
1701 | return -ENOMEM; | |
1702 | ||
1703 | work->id = id_priv; | |
c4028958 | 1704 | INIT_WORK(&work->work, cma_work_handler); |
07ebafba TT |
1705 | work->old_state = CMA_ROUTE_QUERY; |
1706 | work->new_state = CMA_ROUTE_RESOLVED; | |
1707 | work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; | |
1708 | queue_work(cma_wq, &work->work); | |
1709 | return 0; | |
1710 | } | |
1711 | ||
e51060f0 SH |
1712 | int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms) |
1713 | { | |
1714 | struct rdma_id_private *id_priv; | |
1715 | int ret; | |
1716 | ||
1717 | id_priv = container_of(id, struct rdma_id_private, id); | |
1718 | if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_QUERY)) | |
1719 | return -EINVAL; | |
1720 | ||
1721 | atomic_inc(&id_priv->refcount); | |
07ebafba TT |
1722 | switch (rdma_node_get_transport(id->device->node_type)) { |
1723 | case RDMA_TRANSPORT_IB: | |
e51060f0 SH |
1724 | ret = cma_resolve_ib_route(id_priv, timeout_ms); |
1725 | break; | |
07ebafba TT |
1726 | case RDMA_TRANSPORT_IWARP: |
1727 | ret = cma_resolve_iw_route(id_priv, timeout_ms); | |
1728 | break; | |
e51060f0 SH |
1729 | default: |
1730 | ret = -ENOSYS; | |
1731 | break; | |
1732 | } | |
1733 | if (ret) | |
1734 | goto err; | |
1735 | ||
1736 | return 0; | |
1737 | err: | |
1738 | cma_comp_exch(id_priv, CMA_ROUTE_QUERY, CMA_ADDR_RESOLVED); | |
1739 | cma_deref_id(id_priv); | |
1740 | return ret; | |
1741 | } | |
1742 | EXPORT_SYMBOL(rdma_resolve_route); | |
1743 | ||
1744 | static int cma_bind_loopback(struct rdma_id_private *id_priv) | |
1745 | { | |
1746 | struct cma_device *cma_dev; | |
1747 | struct ib_port_attr port_attr; | |
f0ee3404 | 1748 | union ib_gid gid; |
e51060f0 SH |
1749 | u16 pkey; |
1750 | int ret; | |
1751 | u8 p; | |
1752 | ||
1753 | mutex_lock(&lock); | |
e82153b5 KK |
1754 | if (list_empty(&dev_list)) { |
1755 | ret = -ENODEV; | |
1756 | goto out; | |
1757 | } | |
e51060f0 SH |
1758 | list_for_each_entry(cma_dev, &dev_list, list) |
1759 | for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p) | |
e82153b5 | 1760 | if (!ib_query_port(cma_dev->device, p, &port_attr) && |
e51060f0 SH |
1761 | port_attr.state == IB_PORT_ACTIVE) |
1762 | goto port_found; | |
1763 | ||
e82153b5 KK |
1764 | p = 1; |
1765 | cma_dev = list_entry(dev_list.next, struct cma_device, list); | |
e51060f0 SH |
1766 | |
1767 | port_found: | |
f0ee3404 | 1768 | ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid); |
e51060f0 SH |
1769 | if (ret) |
1770 | goto out; | |
1771 | ||
1772 | ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey); | |
1773 | if (ret) | |
1774 | goto out; | |
1775 | ||
6f8372b6 SH |
1776 | id_priv->id.route.addr.dev_addr.dev_type = |
1777 | (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB) ? | |
1778 | ARPHRD_INFINIBAND : ARPHRD_ETHER; | |
1779 | ||
1780 | rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid); | |
e51060f0 SH |
1781 | ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey); |
1782 | id_priv->id.port_num = p; | |
1783 | cma_attach_to_dev(id_priv, cma_dev); | |
1784 | out: | |
1785 | mutex_unlock(&lock); | |
1786 | return ret; | |
1787 | } | |
1788 | ||
1789 | static void addr_handler(int status, struct sockaddr *src_addr, | |
1790 | struct rdma_dev_addr *dev_addr, void *context) | |
1791 | { | |
1792 | struct rdma_id_private *id_priv = context; | |
a1b1b61f | 1793 | struct rdma_cm_event event; |
e51060f0 | 1794 | |
a1b1b61f | 1795 | memset(&event, 0, sizeof event); |
de910bd9 | 1796 | mutex_lock(&id_priv->handler_mutex); |
61a73c70 SH |
1797 | |
1798 | /* | |
1799 | * Grab mutex to block rdma_destroy_id() from removing the device while | |
1800 | * we're trying to acquire it. | |
1801 | */ | |
1802 | mutex_lock(&lock); | |
1803 | if (!cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_RESOLVED)) { | |
1804 | mutex_unlock(&lock); | |
1805 | goto out; | |
1806 | } | |
1807 | ||
1808 | if (!status && !id_priv->cma_dev) | |
e51060f0 | 1809 | status = cma_acquire_dev(id_priv); |
61a73c70 | 1810 | mutex_unlock(&lock); |
e51060f0 SH |
1811 | |
1812 | if (status) { | |
61a73c70 | 1813 | if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ADDR_BOUND)) |
e51060f0 | 1814 | goto out; |
a1b1b61f SH |
1815 | event.event = RDMA_CM_EVENT_ADDR_ERROR; |
1816 | event.status = status; | |
e51060f0 | 1817 | } else { |
e51060f0 SH |
1818 | memcpy(&id_priv->id.route.addr.src_addr, src_addr, |
1819 | ip_addr_size(src_addr)); | |
a1b1b61f | 1820 | event.event = RDMA_CM_EVENT_ADDR_RESOLVED; |
e51060f0 SH |
1821 | } |
1822 | ||
a1b1b61f | 1823 | if (id_priv->id.event_handler(&id_priv->id, &event)) { |
e51060f0 | 1824 | cma_exch(id_priv, CMA_DESTROYING); |
de910bd9 | 1825 | mutex_unlock(&id_priv->handler_mutex); |
e51060f0 SH |
1826 | cma_deref_id(id_priv); |
1827 | rdma_destroy_id(&id_priv->id); | |
1828 | return; | |
1829 | } | |
1830 | out: | |
de910bd9 | 1831 | mutex_unlock(&id_priv->handler_mutex); |
e51060f0 SH |
1832 | cma_deref_id(id_priv); |
1833 | } | |
1834 | ||
1835 | static int cma_resolve_loopback(struct rdma_id_private *id_priv) | |
1836 | { | |
1837 | struct cma_work *work; | |
6f8372b6 | 1838 | struct sockaddr *src, *dst; |
f0ee3404 | 1839 | union ib_gid gid; |
e51060f0 SH |
1840 | int ret; |
1841 | ||
1842 | work = kzalloc(sizeof *work, GFP_KERNEL); | |
1843 | if (!work) | |
1844 | return -ENOMEM; | |
1845 | ||
1846 | if (!id_priv->cma_dev) { | |
1847 | ret = cma_bind_loopback(id_priv); | |
1848 | if (ret) | |
1849 | goto err; | |
1850 | } | |
1851 | ||
6f8372b6 SH |
1852 | rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid); |
1853 | rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid); | |
e51060f0 | 1854 | |
6f8372b6 SH |
1855 | src = (struct sockaddr *) &id_priv->id.route.addr.src_addr; |
1856 | if (cma_zero_addr(src)) { | |
1857 | dst = (struct sockaddr *) &id_priv->id.route.addr.dst_addr; | |
1858 | if ((src->sa_family = dst->sa_family) == AF_INET) { | |
1859 | ((struct sockaddr_in *) src)->sin_addr.s_addr = | |
1860 | ((struct sockaddr_in *) dst)->sin_addr.s_addr; | |
1861 | } else { | |
1862 | ipv6_addr_copy(&((struct sockaddr_in6 *) src)->sin6_addr, | |
1863 | &((struct sockaddr_in6 *) dst)->sin6_addr); | |
1864 | } | |
e51060f0 SH |
1865 | } |
1866 | ||
1867 | work->id = id_priv; | |
c4028958 | 1868 | INIT_WORK(&work->work, cma_work_handler); |
e51060f0 SH |
1869 | work->old_state = CMA_ADDR_QUERY; |
1870 | work->new_state = CMA_ADDR_RESOLVED; | |
1871 | work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED; | |
1872 | queue_work(cma_wq, &work->work); | |
1873 | return 0; | |
1874 | err: | |
1875 | kfree(work); | |
1876 | return ret; | |
1877 | } | |
1878 | ||
1879 | static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, | |
1880 | struct sockaddr *dst_addr) | |
1881 | { | |
d14714df SH |
1882 | if (!src_addr || !src_addr->sa_family) { |
1883 | src_addr = (struct sockaddr *) &id->route.addr.src_addr; | |
1884 | if ((src_addr->sa_family = dst_addr->sa_family) == AF_INET6) { | |
1885 | ((struct sockaddr_in6 *) src_addr)->sin6_scope_id = | |
1886 | ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id; | |
1887 | } | |
1888 | } | |
1889 | return rdma_bind_addr(id, src_addr); | |
e51060f0 SH |
1890 | } |
1891 | ||
1892 | int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, | |
1893 | struct sockaddr *dst_addr, int timeout_ms) | |
1894 | { | |
1895 | struct rdma_id_private *id_priv; | |
1896 | int ret; | |
1897 | ||
1898 | id_priv = container_of(id, struct rdma_id_private, id); | |
1899 | if (id_priv->state == CMA_IDLE) { | |
1900 | ret = cma_bind_addr(id, src_addr, dst_addr); | |
1901 | if (ret) | |
1902 | return ret; | |
1903 | } | |
1904 | ||
1905 | if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_ADDR_QUERY)) | |
1906 | return -EINVAL; | |
1907 | ||
1908 | atomic_inc(&id_priv->refcount); | |
1909 | memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr)); | |
1910 | if (cma_any_addr(dst_addr)) | |
1911 | ret = cma_resolve_loopback(id_priv); | |
1912 | else | |
3f446754 | 1913 | ret = rdma_resolve_ip(&addr_client, (struct sockaddr *) &id->route.addr.src_addr, |
7a118df3 | 1914 | dst_addr, &id->route.addr.dev_addr, |
e51060f0 SH |
1915 | timeout_ms, addr_handler, id_priv); |
1916 | if (ret) | |
1917 | goto err; | |
1918 | ||
1919 | return 0; | |
1920 | err: | |
1921 | cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_BOUND); | |
1922 | cma_deref_id(id_priv); | |
1923 | return ret; | |
1924 | } | |
1925 | EXPORT_SYMBOL(rdma_resolve_addr); | |
1926 | ||
1927 | static void cma_bind_port(struct rdma_bind_list *bind_list, | |
1928 | struct rdma_id_private *id_priv) | |
1929 | { | |
1930 | struct sockaddr_in *sin; | |
1931 | ||
1932 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; | |
1933 | sin->sin_port = htons(bind_list->port); | |
1934 | id_priv->bind_list = bind_list; | |
1935 | hlist_add_head(&id_priv->node, &bind_list->owners); | |
1936 | } | |
1937 | ||
1938 | static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv, | |
1939 | unsigned short snum) | |
1940 | { | |
1941 | struct rdma_bind_list *bind_list; | |
aedec080 | 1942 | int port, ret; |
e51060f0 | 1943 | |
cb164b8c | 1944 | bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL); |
e51060f0 SH |
1945 | if (!bind_list) |
1946 | return -ENOMEM; | |
1947 | ||
aedec080 SH |
1948 | do { |
1949 | ret = idr_get_new_above(ps, bind_list, snum, &port); | |
1950 | } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL)); | |
1951 | ||
1952 | if (ret) | |
1953 | goto err1; | |
1954 | ||
1955 | if (port != snum) { | |
1956 | ret = -EADDRNOTAVAIL; | |
1957 | goto err2; | |
1958 | } | |
1959 | ||
1960 | bind_list->ps = ps; | |
1961 | bind_list->port = (unsigned short) port; | |
1962 | cma_bind_port(bind_list, id_priv); | |
1963 | return 0; | |
1964 | err2: | |
1965 | idr_remove(ps, port); | |
1966 | err1: | |
1967 | kfree(bind_list); | |
1968 | return ret; | |
1969 | } | |
e51060f0 | 1970 | |
aedec080 SH |
1971 | static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv) |
1972 | { | |
1973 | struct rdma_bind_list *bind_list; | |
227b60f5 | 1974 | int port, ret, low, high; |
aedec080 SH |
1975 | |
1976 | bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL); | |
1977 | if (!bind_list) | |
1978 | return -ENOMEM; | |
1979 | ||
1980 | retry: | |
227b60f5 | 1981 | /* FIXME: add proper port randomization per like inet_csk_get_port */ |
e51060f0 | 1982 | do { |
aedec080 | 1983 | ret = idr_get_new_above(ps, bind_list, next_port, &port); |
e51060f0 SH |
1984 | } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL)); |
1985 | ||
1986 | if (ret) | |
aedec080 | 1987 | goto err1; |
e51060f0 | 1988 | |
227b60f5 SH |
1989 | inet_get_local_port_range(&low, &high); |
1990 | if (port > high) { | |
1991 | if (next_port != low) { | |
aedec080 | 1992 | idr_remove(ps, port); |
227b60f5 | 1993 | next_port = low; |
aedec080 SH |
1994 | goto retry; |
1995 | } | |
e51060f0 | 1996 | ret = -EADDRNOTAVAIL; |
aedec080 | 1997 | goto err2; |
e51060f0 SH |
1998 | } |
1999 | ||
227b60f5 SH |
2000 | if (port == high) |
2001 | next_port = low; | |
aedec080 SH |
2002 | else |
2003 | next_port = port + 1; | |
2004 | ||
e51060f0 SH |
2005 | bind_list->ps = ps; |
2006 | bind_list->port = (unsigned short) port; | |
2007 | cma_bind_port(bind_list, id_priv); | |
2008 | return 0; | |
aedec080 SH |
2009 | err2: |
2010 | idr_remove(ps, port); | |
2011 | err1: | |
e51060f0 SH |
2012 | kfree(bind_list); |
2013 | return ret; | |
2014 | } | |
2015 | ||
2016 | static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv) | |
2017 | { | |
2018 | struct rdma_id_private *cur_id; | |
2019 | struct sockaddr_in *sin, *cur_sin; | |
2020 | struct rdma_bind_list *bind_list; | |
2021 | struct hlist_node *node; | |
2022 | unsigned short snum; | |
2023 | ||
2024 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; | |
2025 | snum = ntohs(sin->sin_port); | |
2026 | if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) | |
2027 | return -EACCES; | |
2028 | ||
2029 | bind_list = idr_find(ps, snum); | |
2030 | if (!bind_list) | |
2031 | return cma_alloc_port(ps, id_priv, snum); | |
2032 | ||
2033 | /* | |
2034 | * We don't support binding to any address if anyone is bound to | |
2035 | * a specific address on the same port. | |
2036 | */ | |
3f446754 | 2037 | if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr)) |
e51060f0 SH |
2038 | return -EADDRNOTAVAIL; |
2039 | ||
2040 | hlist_for_each_entry(cur_id, node, &bind_list->owners, node) { | |
3f446754 | 2041 | if (cma_any_addr((struct sockaddr *) &cur_id->id.route.addr.src_addr)) |
e51060f0 | 2042 | return -EADDRNOTAVAIL; |
3cd96564 | 2043 | |
e51060f0 SH |
2044 | cur_sin = (struct sockaddr_in *) &cur_id->id.route.addr.src_addr; |
2045 | if (sin->sin_addr.s_addr == cur_sin->sin_addr.s_addr) | |
2046 | return -EADDRINUSE; | |
2047 | } | |
2048 | ||
2049 | cma_bind_port(bind_list, id_priv); | |
2050 | return 0; | |
2051 | } | |
2052 | ||
2053 | static int cma_get_port(struct rdma_id_private *id_priv) | |
2054 | { | |
2055 | struct idr *ps; | |
2056 | int ret; | |
2057 | ||
2058 | switch (id_priv->id.ps) { | |
2059 | case RDMA_PS_SDP: | |
2060 | ps = &sdp_ps; | |
2061 | break; | |
2062 | case RDMA_PS_TCP: | |
2063 | ps = &tcp_ps; | |
2064 | break; | |
628e5f6d SH |
2065 | case RDMA_PS_UDP: |
2066 | ps = &udp_ps; | |
2067 | break; | |
c8f6a362 SH |
2068 | case RDMA_PS_IPOIB: |
2069 | ps = &ipoib_ps; | |
2070 | break; | |
e51060f0 SH |
2071 | default: |
2072 | return -EPROTONOSUPPORT; | |
2073 | } | |
2074 | ||
2075 | mutex_lock(&lock); | |
3f446754 | 2076 | if (cma_any_port((struct sockaddr *) &id_priv->id.route.addr.src_addr)) |
aedec080 | 2077 | ret = cma_alloc_any_port(ps, id_priv); |
e51060f0 SH |
2078 | else |
2079 | ret = cma_use_port(ps, id_priv); | |
2080 | mutex_unlock(&lock); | |
2081 | ||
2082 | return ret; | |
2083 | } | |
2084 | ||
d14714df SH |
2085 | static int cma_check_linklocal(struct rdma_dev_addr *dev_addr, |
2086 | struct sockaddr *addr) | |
2087 | { | |
fd4582a3 | 2088 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
d14714df SH |
2089 | struct sockaddr_in6 *sin6; |
2090 | ||
2091 | if (addr->sa_family != AF_INET6) | |
2092 | return 0; | |
2093 | ||
2094 | sin6 = (struct sockaddr_in6 *) addr; | |
2095 | if ((ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) && | |
2096 | !sin6->sin6_scope_id) | |
2097 | return -EINVAL; | |
2098 | ||
2099 | dev_addr->bound_dev_if = sin6->sin6_scope_id; | |
2100 | #endif | |
2101 | return 0; | |
2102 | } | |
2103 | ||
e51060f0 SH |
2104 | int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr) |
2105 | { | |
2106 | struct rdma_id_private *id_priv; | |
2107 | int ret; | |
2108 | ||
1f5175ad | 2109 | if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6) |
e51060f0 SH |
2110 | return -EAFNOSUPPORT; |
2111 | ||
2112 | id_priv = container_of(id, struct rdma_id_private, id); | |
2113 | if (!cma_comp_exch(id_priv, CMA_IDLE, CMA_ADDR_BOUND)) | |
2114 | return -EINVAL; | |
2115 | ||
d14714df SH |
2116 | ret = cma_check_linklocal(&id->route.addr.dev_addr, addr); |
2117 | if (ret) | |
2118 | goto err1; | |
2119 | ||
8523c048 | 2120 | if (!cma_any_addr(addr)) { |
e51060f0 | 2121 | ret = rdma_translate_ip(addr, &id->route.addr.dev_addr); |
e51060f0 | 2122 | if (ret) |
255d0c14 KK |
2123 | goto err1; |
2124 | ||
2125 | mutex_lock(&lock); | |
2126 | ret = cma_acquire_dev(id_priv); | |
2127 | mutex_unlock(&lock); | |
2128 | if (ret) | |
2129 | goto err1; | |
e51060f0 SH |
2130 | } |
2131 | ||
2132 | memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr)); | |
2133 | ret = cma_get_port(id_priv); | |
2134 | if (ret) | |
255d0c14 | 2135 | goto err2; |
e51060f0 SH |
2136 | |
2137 | return 0; | |
255d0c14 | 2138 | err2: |
6f8372b6 | 2139 | if (id_priv->cma_dev) { |
255d0c14 KK |
2140 | mutex_lock(&lock); |
2141 | cma_detach_from_dev(id_priv); | |
2142 | mutex_unlock(&lock); | |
2143 | } | |
2144 | err1: | |
e51060f0 SH |
2145 | cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_IDLE); |
2146 | return ret; | |
2147 | } | |
2148 | EXPORT_SYMBOL(rdma_bind_addr); | |
2149 | ||
2150 | static int cma_format_hdr(void *hdr, enum rdma_port_space ps, | |
2151 | struct rdma_route *route) | |
2152 | { | |
e51060f0 SH |
2153 | struct cma_hdr *cma_hdr; |
2154 | struct sdp_hh *sdp_hdr; | |
2155 | ||
1f5175ad AS |
2156 | if (route->addr.src_addr.ss_family == AF_INET) { |
2157 | struct sockaddr_in *src4, *dst4; | |
2158 | ||
2159 | src4 = (struct sockaddr_in *) &route->addr.src_addr; | |
2160 | dst4 = (struct sockaddr_in *) &route->addr.dst_addr; | |
2161 | ||
2162 | switch (ps) { | |
2163 | case RDMA_PS_SDP: | |
2164 | sdp_hdr = hdr; | |
2165 | if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION) | |
2166 | return -EINVAL; | |
2167 | sdp_set_ip_ver(sdp_hdr, 4); | |
2168 | sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; | |
2169 | sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; | |
2170 | sdp_hdr->port = src4->sin_port; | |
2171 | break; | |
2172 | default: | |
2173 | cma_hdr = hdr; | |
2174 | cma_hdr->cma_version = CMA_VERSION; | |
2175 | cma_set_ip_ver(cma_hdr, 4); | |
2176 | cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; | |
2177 | cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; | |
2178 | cma_hdr->port = src4->sin_port; | |
2179 | break; | |
2180 | } | |
2181 | } else { | |
2182 | struct sockaddr_in6 *src6, *dst6; | |
2183 | ||
2184 | src6 = (struct sockaddr_in6 *) &route->addr.src_addr; | |
2185 | dst6 = (struct sockaddr_in6 *) &route->addr.dst_addr; | |
2186 | ||
2187 | switch (ps) { | |
2188 | case RDMA_PS_SDP: | |
2189 | sdp_hdr = hdr; | |
2190 | if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION) | |
2191 | return -EINVAL; | |
2192 | sdp_set_ip_ver(sdp_hdr, 6); | |
2193 | sdp_hdr->src_addr.ip6 = src6->sin6_addr; | |
2194 | sdp_hdr->dst_addr.ip6 = dst6->sin6_addr; | |
2195 | sdp_hdr->port = src6->sin6_port; | |
2196 | break; | |
2197 | default: | |
2198 | cma_hdr = hdr; | |
2199 | cma_hdr->cma_version = CMA_VERSION; | |
2200 | cma_set_ip_ver(cma_hdr, 6); | |
2201 | cma_hdr->src_addr.ip6 = src6->sin6_addr; | |
2202 | cma_hdr->dst_addr.ip6 = dst6->sin6_addr; | |
2203 | cma_hdr->port = src6->sin6_port; | |
2204 | break; | |
2205 | } | |
e51060f0 SH |
2206 | } |
2207 | return 0; | |
2208 | } | |
2209 | ||
628e5f6d SH |
2210 | static int cma_sidr_rep_handler(struct ib_cm_id *cm_id, |
2211 | struct ib_cm_event *ib_event) | |
2212 | { | |
2213 | struct rdma_id_private *id_priv = cm_id->context; | |
2214 | struct rdma_cm_event event; | |
2215 | struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd; | |
2216 | int ret = 0; | |
2217 | ||
de910bd9 | 2218 | if (cma_disable_callback(id_priv, CMA_CONNECT)) |
8aa08602 | 2219 | return 0; |
628e5f6d | 2220 | |
8aa08602 | 2221 | memset(&event, 0, sizeof event); |
628e5f6d SH |
2222 | switch (ib_event->event) { |
2223 | case IB_CM_SIDR_REQ_ERROR: | |
2224 | event.event = RDMA_CM_EVENT_UNREACHABLE; | |
2225 | event.status = -ETIMEDOUT; | |
2226 | break; | |
2227 | case IB_CM_SIDR_REP_RECEIVED: | |
2228 | event.param.ud.private_data = ib_event->private_data; | |
2229 | event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; | |
2230 | if (rep->status != IB_SIDR_SUCCESS) { | |
2231 | event.event = RDMA_CM_EVENT_UNREACHABLE; | |
2232 | event.status = ib_event->param.sidr_rep_rcvd.status; | |
2233 | break; | |
2234 | } | |
d2ca39f2 YE |
2235 | ret = cma_set_qkey(id_priv); |
2236 | if (ret) { | |
2237 | event.event = RDMA_CM_EVENT_ADDR_ERROR; | |
2238 | event.status = -EINVAL; | |
2239 | break; | |
2240 | } | |
c8f6a362 | 2241 | if (id_priv->qkey != rep->qkey) { |
628e5f6d SH |
2242 | event.event = RDMA_CM_EVENT_UNREACHABLE; |
2243 | event.status = -EINVAL; | |
2244 | break; | |
2245 | } | |
2246 | ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num, | |
2247 | id_priv->id.route.path_rec, | |
2248 | &event.param.ud.ah_attr); | |
2249 | event.param.ud.qp_num = rep->qpn; | |
2250 | event.param.ud.qkey = rep->qkey; | |
2251 | event.event = RDMA_CM_EVENT_ESTABLISHED; | |
2252 | event.status = 0; | |
2253 | break; | |
2254 | default: | |
468f2239 | 2255 | printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n", |
628e5f6d SH |
2256 | ib_event->event); |
2257 | goto out; | |
2258 | } | |
2259 | ||
2260 | ret = id_priv->id.event_handler(&id_priv->id, &event); | |
2261 | if (ret) { | |
2262 | /* Destroy the CM ID by returning a non-zero value. */ | |
2263 | id_priv->cm_id.ib = NULL; | |
2264 | cma_exch(id_priv, CMA_DESTROYING); | |
de910bd9 | 2265 | mutex_unlock(&id_priv->handler_mutex); |
628e5f6d SH |
2266 | rdma_destroy_id(&id_priv->id); |
2267 | return ret; | |
2268 | } | |
2269 | out: | |
de910bd9 | 2270 | mutex_unlock(&id_priv->handler_mutex); |
628e5f6d SH |
2271 | return ret; |
2272 | } | |
2273 | ||
2274 | static int cma_resolve_ib_udp(struct rdma_id_private *id_priv, | |
2275 | struct rdma_conn_param *conn_param) | |
2276 | { | |
2277 | struct ib_cm_sidr_req_param req; | |
2278 | struct rdma_route *route; | |
2279 | int ret; | |
2280 | ||
2281 | req.private_data_len = sizeof(struct cma_hdr) + | |
2282 | conn_param->private_data_len; | |
2283 | req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC); | |
2284 | if (!req.private_data) | |
2285 | return -ENOMEM; | |
2286 | ||
2287 | if (conn_param->private_data && conn_param->private_data_len) | |
2288 | memcpy((void *) req.private_data + sizeof(struct cma_hdr), | |
2289 | conn_param->private_data, conn_param->private_data_len); | |
2290 | ||
2291 | route = &id_priv->id.route; | |
2292 | ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route); | |
2293 | if (ret) | |
2294 | goto out; | |
2295 | ||
2296 | id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, | |
2297 | cma_sidr_rep_handler, id_priv); | |
2298 | if (IS_ERR(id_priv->cm_id.ib)) { | |
2299 | ret = PTR_ERR(id_priv->cm_id.ib); | |
2300 | goto out; | |
2301 | } | |
2302 | ||
2303 | req.path = route->path_rec; | |
2304 | req.service_id = cma_get_service_id(id_priv->id.ps, | |
3f446754 | 2305 | (struct sockaddr *) &route->addr.dst_addr); |
628e5f6d SH |
2306 | req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8); |
2307 | req.max_cm_retries = CMA_MAX_CM_RETRIES; | |
2308 | ||
2309 | ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req); | |
2310 | if (ret) { | |
2311 | ib_destroy_cm_id(id_priv->cm_id.ib); | |
2312 | id_priv->cm_id.ib = NULL; | |
2313 | } | |
2314 | out: | |
2315 | kfree(req.private_data); | |
2316 | return ret; | |
2317 | } | |
2318 | ||
e51060f0 SH |
2319 | static int cma_connect_ib(struct rdma_id_private *id_priv, |
2320 | struct rdma_conn_param *conn_param) | |
2321 | { | |
2322 | struct ib_cm_req_param req; | |
2323 | struct rdma_route *route; | |
2324 | void *private_data; | |
2325 | int offset, ret; | |
2326 | ||
2327 | memset(&req, 0, sizeof req); | |
2328 | offset = cma_user_data_offset(id_priv->id.ps); | |
2329 | req.private_data_len = offset + conn_param->private_data_len; | |
2330 | private_data = kzalloc(req.private_data_len, GFP_ATOMIC); | |
2331 | if (!private_data) | |
2332 | return -ENOMEM; | |
2333 | ||
2334 | if (conn_param->private_data && conn_param->private_data_len) | |
2335 | memcpy(private_data + offset, conn_param->private_data, | |
2336 | conn_param->private_data_len); | |
2337 | ||
2338 | id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_ib_handler, | |
2339 | id_priv); | |
2340 | if (IS_ERR(id_priv->cm_id.ib)) { | |
2341 | ret = PTR_ERR(id_priv->cm_id.ib); | |
2342 | goto out; | |
2343 | } | |
2344 | ||
2345 | route = &id_priv->id.route; | |
2346 | ret = cma_format_hdr(private_data, id_priv->id.ps, route); | |
2347 | if (ret) | |
2348 | goto out; | |
2349 | req.private_data = private_data; | |
2350 | ||
2351 | req.primary_path = &route->path_rec[0]; | |
2352 | if (route->num_paths == 2) | |
2353 | req.alternate_path = &route->path_rec[1]; | |
2354 | ||
2355 | req.service_id = cma_get_service_id(id_priv->id.ps, | |
3f446754 | 2356 | (struct sockaddr *) &route->addr.dst_addr); |
e51060f0 | 2357 | req.qp_num = id_priv->qp_num; |
9b2e9c0c | 2358 | req.qp_type = IB_QPT_RC; |
e51060f0 SH |
2359 | req.starting_psn = id_priv->seq_num; |
2360 | req.responder_resources = conn_param->responder_resources; | |
2361 | req.initiator_depth = conn_param->initiator_depth; | |
2362 | req.flow_control = conn_param->flow_control; | |
2363 | req.retry_count = conn_param->retry_count; | |
2364 | req.rnr_retry_count = conn_param->rnr_retry_count; | |
2365 | req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; | |
2366 | req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; | |
2367 | req.max_cm_retries = CMA_MAX_CM_RETRIES; | |
2368 | req.srq = id_priv->srq ? 1 : 0; | |
2369 | ||
2370 | ret = ib_send_cm_req(id_priv->cm_id.ib, &req); | |
2371 | out: | |
675a027c KK |
2372 | if (ret && !IS_ERR(id_priv->cm_id.ib)) { |
2373 | ib_destroy_cm_id(id_priv->cm_id.ib); | |
2374 | id_priv->cm_id.ib = NULL; | |
2375 | } | |
2376 | ||
e51060f0 SH |
2377 | kfree(private_data); |
2378 | return ret; | |
2379 | } | |
2380 | ||
07ebafba TT |
2381 | static int cma_connect_iw(struct rdma_id_private *id_priv, |
2382 | struct rdma_conn_param *conn_param) | |
2383 | { | |
2384 | struct iw_cm_id *cm_id; | |
2385 | struct sockaddr_in* sin; | |
2386 | int ret; | |
2387 | struct iw_cm_conn_param iw_param; | |
2388 | ||
2389 | cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv); | |
2390 | if (IS_ERR(cm_id)) { | |
2391 | ret = PTR_ERR(cm_id); | |
2392 | goto out; | |
2393 | } | |
2394 | ||
2395 | id_priv->cm_id.iw = cm_id; | |
2396 | ||
2397 | sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr; | |
2398 | cm_id->local_addr = *sin; | |
2399 | ||
2400 | sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr; | |
2401 | cm_id->remote_addr = *sin; | |
2402 | ||
5851bb89 | 2403 | ret = cma_modify_qp_rtr(id_priv, conn_param); |
675a027c KK |
2404 | if (ret) |
2405 | goto out; | |
07ebafba TT |
2406 | |
2407 | iw_param.ord = conn_param->initiator_depth; | |
2408 | iw_param.ird = conn_param->responder_resources; | |
2409 | iw_param.private_data = conn_param->private_data; | |
2410 | iw_param.private_data_len = conn_param->private_data_len; | |
2411 | if (id_priv->id.qp) | |
2412 | iw_param.qpn = id_priv->qp_num; | |
2413 | else | |
2414 | iw_param.qpn = conn_param->qp_num; | |
2415 | ret = iw_cm_connect(cm_id, &iw_param); | |
2416 | out: | |
675a027c KK |
2417 | if (ret && !IS_ERR(cm_id)) { |
2418 | iw_destroy_cm_id(cm_id); | |
2419 | id_priv->cm_id.iw = NULL; | |
2420 | } | |
07ebafba TT |
2421 | return ret; |
2422 | } | |
2423 | ||
e51060f0 SH |
2424 | int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) |
2425 | { | |
2426 | struct rdma_id_private *id_priv; | |
2427 | int ret; | |
2428 | ||
2429 | id_priv = container_of(id, struct rdma_id_private, id); | |
2430 | if (!cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_CONNECT)) | |
2431 | return -EINVAL; | |
2432 | ||
2433 | if (!id->qp) { | |
2434 | id_priv->qp_num = conn_param->qp_num; | |
e51060f0 SH |
2435 | id_priv->srq = conn_param->srq; |
2436 | } | |
2437 | ||
07ebafba TT |
2438 | switch (rdma_node_get_transport(id->device->node_type)) { |
2439 | case RDMA_TRANSPORT_IB: | |
c8f6a362 | 2440 | if (cma_is_ud_ps(id->ps)) |
628e5f6d SH |
2441 | ret = cma_resolve_ib_udp(id_priv, conn_param); |
2442 | else | |
2443 | ret = cma_connect_ib(id_priv, conn_param); | |
e51060f0 | 2444 | break; |
07ebafba TT |
2445 | case RDMA_TRANSPORT_IWARP: |
2446 | ret = cma_connect_iw(id_priv, conn_param); | |
2447 | break; | |
e51060f0 SH |
2448 | default: |
2449 | ret = -ENOSYS; | |
2450 | break; | |
2451 | } | |
2452 | if (ret) | |
2453 | goto err; | |
2454 | ||
2455 | return 0; | |
2456 | err: | |
2457 | cma_comp_exch(id_priv, CMA_CONNECT, CMA_ROUTE_RESOLVED); | |
2458 | return ret; | |
2459 | } | |
2460 | EXPORT_SYMBOL(rdma_connect); | |
2461 | ||
2462 | static int cma_accept_ib(struct rdma_id_private *id_priv, | |
2463 | struct rdma_conn_param *conn_param) | |
2464 | { | |
2465 | struct ib_cm_rep_param rep; | |
5851bb89 | 2466 | int ret; |
0fe313b0 | 2467 | |
5851bb89 SH |
2468 | ret = cma_modify_qp_rtr(id_priv, conn_param); |
2469 | if (ret) | |
2470 | goto out; | |
0fe313b0 | 2471 | |
5851bb89 SH |
2472 | ret = cma_modify_qp_rts(id_priv, conn_param); |
2473 | if (ret) | |
2474 | goto out; | |
e51060f0 SH |
2475 | |
2476 | memset(&rep, 0, sizeof rep); | |
2477 | rep.qp_num = id_priv->qp_num; | |
2478 | rep.starting_psn = id_priv->seq_num; | |
2479 | rep.private_data = conn_param->private_data; | |
2480 | rep.private_data_len = conn_param->private_data_len; | |
2481 | rep.responder_resources = conn_param->responder_resources; | |
2482 | rep.initiator_depth = conn_param->initiator_depth; | |
e51060f0 SH |
2483 | rep.failover_accepted = 0; |
2484 | rep.flow_control = conn_param->flow_control; | |
2485 | rep.rnr_retry_count = conn_param->rnr_retry_count; | |
2486 | rep.srq = id_priv->srq ? 1 : 0; | |
2487 | ||
0fe313b0 SH |
2488 | ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep); |
2489 | out: | |
2490 | return ret; | |
e51060f0 SH |
2491 | } |
2492 | ||
07ebafba TT |
2493 | static int cma_accept_iw(struct rdma_id_private *id_priv, |
2494 | struct rdma_conn_param *conn_param) | |
2495 | { | |
2496 | struct iw_cm_conn_param iw_param; | |
2497 | int ret; | |
2498 | ||
5851bb89 | 2499 | ret = cma_modify_qp_rtr(id_priv, conn_param); |
07ebafba TT |
2500 | if (ret) |
2501 | return ret; | |
2502 | ||
2503 | iw_param.ord = conn_param->initiator_depth; | |
2504 | iw_param.ird = conn_param->responder_resources; | |
2505 | iw_param.private_data = conn_param->private_data; | |
2506 | iw_param.private_data_len = conn_param->private_data_len; | |
2507 | if (id_priv->id.qp) { | |
2508 | iw_param.qpn = id_priv->qp_num; | |
2509 | } else | |
2510 | iw_param.qpn = conn_param->qp_num; | |
2511 | ||
2512 | return iw_cm_accept(id_priv->cm_id.iw, &iw_param); | |
2513 | } | |
2514 | ||
628e5f6d SH |
2515 | static int cma_send_sidr_rep(struct rdma_id_private *id_priv, |
2516 | enum ib_cm_sidr_status status, | |
2517 | const void *private_data, int private_data_len) | |
2518 | { | |
2519 | struct ib_cm_sidr_rep_param rep; | |
d2ca39f2 | 2520 | int ret; |
628e5f6d SH |
2521 | |
2522 | memset(&rep, 0, sizeof rep); | |
2523 | rep.status = status; | |
2524 | if (status == IB_SIDR_SUCCESS) { | |
d2ca39f2 YE |
2525 | ret = cma_set_qkey(id_priv); |
2526 | if (ret) | |
2527 | return ret; | |
628e5f6d | 2528 | rep.qp_num = id_priv->qp_num; |
c8f6a362 | 2529 | rep.qkey = id_priv->qkey; |
628e5f6d SH |
2530 | } |
2531 | rep.private_data = private_data; | |
2532 | rep.private_data_len = private_data_len; | |
2533 | ||
2534 | return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep); | |
2535 | } | |
2536 | ||
e51060f0 SH |
2537 | int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) |
2538 | { | |
2539 | struct rdma_id_private *id_priv; | |
2540 | int ret; | |
2541 | ||
2542 | id_priv = container_of(id, struct rdma_id_private, id); | |
2543 | if (!cma_comp(id_priv, CMA_CONNECT)) | |
2544 | return -EINVAL; | |
2545 | ||
2546 | if (!id->qp && conn_param) { | |
2547 | id_priv->qp_num = conn_param->qp_num; | |
e51060f0 SH |
2548 | id_priv->srq = conn_param->srq; |
2549 | } | |
2550 | ||
07ebafba TT |
2551 | switch (rdma_node_get_transport(id->device->node_type)) { |
2552 | case RDMA_TRANSPORT_IB: | |
c8f6a362 | 2553 | if (cma_is_ud_ps(id->ps)) |
628e5f6d SH |
2554 | ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS, |
2555 | conn_param->private_data, | |
2556 | conn_param->private_data_len); | |
2557 | else if (conn_param) | |
e51060f0 SH |
2558 | ret = cma_accept_ib(id_priv, conn_param); |
2559 | else | |
2560 | ret = cma_rep_recv(id_priv); | |
2561 | break; | |
07ebafba TT |
2562 | case RDMA_TRANSPORT_IWARP: |
2563 | ret = cma_accept_iw(id_priv, conn_param); | |
2564 | break; | |
e51060f0 SH |
2565 | default: |
2566 | ret = -ENOSYS; | |
2567 | break; | |
2568 | } | |
2569 | ||
2570 | if (ret) | |
2571 | goto reject; | |
2572 | ||
2573 | return 0; | |
2574 | reject: | |
c5483388 | 2575 | cma_modify_qp_err(id_priv); |
e51060f0 SH |
2576 | rdma_reject(id, NULL, 0); |
2577 | return ret; | |
2578 | } | |
2579 | EXPORT_SYMBOL(rdma_accept); | |
2580 | ||
0fe313b0 SH |
2581 | int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event) |
2582 | { | |
2583 | struct rdma_id_private *id_priv; | |
2584 | int ret; | |
2585 | ||
2586 | id_priv = container_of(id, struct rdma_id_private, id); | |
6c719f5c | 2587 | if (!cma_has_cm_dev(id_priv)) |
0fe313b0 SH |
2588 | return -EINVAL; |
2589 | ||
2590 | switch (id->device->node_type) { | |
2591 | case RDMA_NODE_IB_CA: | |
2592 | ret = ib_cm_notify(id_priv->cm_id.ib, event); | |
2593 | break; | |
2594 | default: | |
2595 | ret = 0; | |
2596 | break; | |
2597 | } | |
2598 | return ret; | |
2599 | } | |
2600 | EXPORT_SYMBOL(rdma_notify); | |
2601 | ||
e51060f0 SH |
2602 | int rdma_reject(struct rdma_cm_id *id, const void *private_data, |
2603 | u8 private_data_len) | |
2604 | { | |
2605 | struct rdma_id_private *id_priv; | |
2606 | int ret; | |
2607 | ||
2608 | id_priv = container_of(id, struct rdma_id_private, id); | |
6c719f5c | 2609 | if (!cma_has_cm_dev(id_priv)) |
e51060f0 SH |
2610 | return -EINVAL; |
2611 | ||
07ebafba TT |
2612 | switch (rdma_node_get_transport(id->device->node_type)) { |
2613 | case RDMA_TRANSPORT_IB: | |
c8f6a362 | 2614 | if (cma_is_ud_ps(id->ps)) |
628e5f6d SH |
2615 | ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, |
2616 | private_data, private_data_len); | |
2617 | else | |
2618 | ret = ib_send_cm_rej(id_priv->cm_id.ib, | |
2619 | IB_CM_REJ_CONSUMER_DEFINED, NULL, | |
2620 | 0, private_data, private_data_len); | |
e51060f0 | 2621 | break; |
07ebafba TT |
2622 | case RDMA_TRANSPORT_IWARP: |
2623 | ret = iw_cm_reject(id_priv->cm_id.iw, | |
2624 | private_data, private_data_len); | |
2625 | break; | |
e51060f0 SH |
2626 | default: |
2627 | ret = -ENOSYS; | |
2628 | break; | |
2629 | } | |
2630 | return ret; | |
2631 | } | |
2632 | EXPORT_SYMBOL(rdma_reject); | |
2633 | ||
2634 | int rdma_disconnect(struct rdma_cm_id *id) | |
2635 | { | |
2636 | struct rdma_id_private *id_priv; | |
2637 | int ret; | |
2638 | ||
2639 | id_priv = container_of(id, struct rdma_id_private, id); | |
6c719f5c | 2640 | if (!cma_has_cm_dev(id_priv)) |
e51060f0 SH |
2641 | return -EINVAL; |
2642 | ||
07ebafba TT |
2643 | switch (rdma_node_get_transport(id->device->node_type)) { |
2644 | case RDMA_TRANSPORT_IB: | |
c5483388 | 2645 | ret = cma_modify_qp_err(id_priv); |
07ebafba TT |
2646 | if (ret) |
2647 | goto out; | |
e51060f0 SH |
2648 | /* Initiate or respond to a disconnect. */ |
2649 | if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0)) | |
2650 | ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0); | |
2651 | break; | |
07ebafba TT |
2652 | case RDMA_TRANSPORT_IWARP: |
2653 | ret = iw_cm_disconnect(id_priv->cm_id.iw, 0); | |
2654 | break; | |
e51060f0 | 2655 | default: |
07ebafba | 2656 | ret = -EINVAL; |
e51060f0 SH |
2657 | break; |
2658 | } | |
2659 | out: | |
2660 | return ret; | |
2661 | } | |
2662 | EXPORT_SYMBOL(rdma_disconnect); | |
2663 | ||
c8f6a362 SH |
2664 | static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast) |
2665 | { | |
2666 | struct rdma_id_private *id_priv; | |
2667 | struct cma_multicast *mc = multicast->context; | |
2668 | struct rdma_cm_event event; | |
2669 | int ret; | |
2670 | ||
2671 | id_priv = mc->id_priv; | |
de910bd9 OG |
2672 | if (cma_disable_callback(id_priv, CMA_ADDR_BOUND) && |
2673 | cma_disable_callback(id_priv, CMA_ADDR_RESOLVED)) | |
8aa08602 | 2674 | return 0; |
c8f6a362 | 2675 | |
c5483388 | 2676 | mutex_lock(&id_priv->qp_mutex); |
c8f6a362 SH |
2677 | if (!status && id_priv->id.qp) |
2678 | status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid, | |
2679 | multicast->rec.mlid); | |
c5483388 | 2680 | mutex_unlock(&id_priv->qp_mutex); |
c8f6a362 SH |
2681 | |
2682 | memset(&event, 0, sizeof event); | |
2683 | event.status = status; | |
2684 | event.param.ud.private_data = mc->context; | |
2685 | if (!status) { | |
2686 | event.event = RDMA_CM_EVENT_MULTICAST_JOIN; | |
2687 | ib_init_ah_from_mcmember(id_priv->id.device, | |
2688 | id_priv->id.port_num, &multicast->rec, | |
2689 | &event.param.ud.ah_attr); | |
2690 | event.param.ud.qp_num = 0xFFFFFF; | |
2691 | event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey); | |
2692 | } else | |
2693 | event.event = RDMA_CM_EVENT_MULTICAST_ERROR; | |
2694 | ||
2695 | ret = id_priv->id.event_handler(&id_priv->id, &event); | |
2696 | if (ret) { | |
2697 | cma_exch(id_priv, CMA_DESTROYING); | |
de910bd9 | 2698 | mutex_unlock(&id_priv->handler_mutex); |
c8f6a362 SH |
2699 | rdma_destroy_id(&id_priv->id); |
2700 | return 0; | |
2701 | } | |
8aa08602 | 2702 | |
de910bd9 | 2703 | mutex_unlock(&id_priv->handler_mutex); |
c8f6a362 SH |
2704 | return 0; |
2705 | } | |
2706 | ||
2707 | static void cma_set_mgid(struct rdma_id_private *id_priv, | |
2708 | struct sockaddr *addr, union ib_gid *mgid) | |
2709 | { | |
2710 | unsigned char mc_map[MAX_ADDR_LEN]; | |
2711 | struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; | |
2712 | struct sockaddr_in *sin = (struct sockaddr_in *) addr; | |
2713 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr; | |
2714 | ||
2715 | if (cma_any_addr(addr)) { | |
2716 | memset(mgid, 0, sizeof *mgid); | |
2717 | } else if ((addr->sa_family == AF_INET6) && | |
1c9b2819 | 2718 | ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) == |
c8f6a362 SH |
2719 | 0xFF10A01B)) { |
2720 | /* IPv6 address is an SA assigned MGID. */ | |
2721 | memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); | |
e2e62697 JG |
2722 | } else if ((addr->sa_family == AF_INET6)) { |
2723 | ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map); | |
2724 | if (id_priv->id.ps == RDMA_PS_UDP) | |
2725 | mc_map[7] = 0x01; /* Use RDMA CM signature */ | |
2726 | *mgid = *(union ib_gid *) (mc_map + 4); | |
c8f6a362 | 2727 | } else { |
a9e527e3 | 2728 | ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map); |
c8f6a362 SH |
2729 | if (id_priv->id.ps == RDMA_PS_UDP) |
2730 | mc_map[7] = 0x01; /* Use RDMA CM signature */ | |
c8f6a362 SH |
2731 | *mgid = *(union ib_gid *) (mc_map + 4); |
2732 | } | |
2733 | } | |
2734 | ||
2735 | static int cma_join_ib_multicast(struct rdma_id_private *id_priv, | |
2736 | struct cma_multicast *mc) | |
2737 | { | |
2738 | struct ib_sa_mcmember_rec rec; | |
2739 | struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; | |
2740 | ib_sa_comp_mask comp_mask; | |
2741 | int ret; | |
2742 | ||
2743 | ib_addr_get_mgid(dev_addr, &rec.mgid); | |
2744 | ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num, | |
2745 | &rec.mgid, &rec); | |
2746 | if (ret) | |
2747 | return ret; | |
2748 | ||
3f446754 | 2749 | cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid); |
c8f6a362 SH |
2750 | if (id_priv->id.ps == RDMA_PS_UDP) |
2751 | rec.qkey = cpu_to_be32(RDMA_UDP_QKEY); | |
6f8372b6 | 2752 | rdma_addr_get_sgid(dev_addr, &rec.port_gid); |
c8f6a362 SH |
2753 | rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); |
2754 | rec.join_state = 1; | |
2755 | ||
2756 | comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID | | |
2757 | IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE | | |
2758 | IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL | | |
2759 | IB_SA_MCMEMBER_REC_FLOW_LABEL | | |
2760 | IB_SA_MCMEMBER_REC_TRAFFIC_CLASS; | |
2761 | ||
84adeee9 YE |
2762 | if (id_priv->id.ps == RDMA_PS_IPOIB) |
2763 | comp_mask |= IB_SA_MCMEMBER_REC_RATE | | |
2764 | IB_SA_MCMEMBER_REC_RATE_SELECTOR; | |
2765 | ||
c8f6a362 SH |
2766 | mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device, |
2767 | id_priv->id.port_num, &rec, | |
2768 | comp_mask, GFP_KERNEL, | |
2769 | cma_ib_mc_handler, mc); | |
2770 | if (IS_ERR(mc->multicast.ib)) | |
2771 | return PTR_ERR(mc->multicast.ib); | |
2772 | ||
2773 | return 0; | |
2774 | } | |
2775 | ||
2776 | int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr, | |
2777 | void *context) | |
2778 | { | |
2779 | struct rdma_id_private *id_priv; | |
2780 | struct cma_multicast *mc; | |
2781 | int ret; | |
2782 | ||
2783 | id_priv = container_of(id, struct rdma_id_private, id); | |
2784 | if (!cma_comp(id_priv, CMA_ADDR_BOUND) && | |
2785 | !cma_comp(id_priv, CMA_ADDR_RESOLVED)) | |
2786 | return -EINVAL; | |
2787 | ||
2788 | mc = kmalloc(sizeof *mc, GFP_KERNEL); | |
2789 | if (!mc) | |
2790 | return -ENOMEM; | |
2791 | ||
2792 | memcpy(&mc->addr, addr, ip_addr_size(addr)); | |
2793 | mc->context = context; | |
2794 | mc->id_priv = id_priv; | |
2795 | ||
2796 | spin_lock(&id_priv->lock); | |
2797 | list_add(&mc->list, &id_priv->mc_list); | |
2798 | spin_unlock(&id_priv->lock); | |
2799 | ||
2800 | switch (rdma_node_get_transport(id->device->node_type)) { | |
2801 | case RDMA_TRANSPORT_IB: | |
2802 | ret = cma_join_ib_multicast(id_priv, mc); | |
2803 | break; | |
2804 | default: | |
2805 | ret = -ENOSYS; | |
2806 | break; | |
2807 | } | |
2808 | ||
2809 | if (ret) { | |
2810 | spin_lock_irq(&id_priv->lock); | |
2811 | list_del(&mc->list); | |
2812 | spin_unlock_irq(&id_priv->lock); | |
2813 | kfree(mc); | |
2814 | } | |
2815 | return ret; | |
2816 | } | |
2817 | EXPORT_SYMBOL(rdma_join_multicast); | |
2818 | ||
2819 | void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr) | |
2820 | { | |
2821 | struct rdma_id_private *id_priv; | |
2822 | struct cma_multicast *mc; | |
2823 | ||
2824 | id_priv = container_of(id, struct rdma_id_private, id); | |
2825 | spin_lock_irq(&id_priv->lock); | |
2826 | list_for_each_entry(mc, &id_priv->mc_list, list) { | |
2827 | if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) { | |
2828 | list_del(&mc->list); | |
2829 | spin_unlock_irq(&id_priv->lock); | |
2830 | ||
2831 | if (id->qp) | |
2832 | ib_detach_mcast(id->qp, | |
2833 | &mc->multicast.ib->rec.mgid, | |
2834 | mc->multicast.ib->rec.mlid); | |
2835 | ib_sa_free_multicast(mc->multicast.ib); | |
2836 | kfree(mc); | |
2837 | return; | |
2838 | } | |
2839 | } | |
2840 | spin_unlock_irq(&id_priv->lock); | |
2841 | } | |
2842 | EXPORT_SYMBOL(rdma_leave_multicast); | |
2843 | ||
dd5bdff8 OG |
2844 | static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv) |
2845 | { | |
2846 | struct rdma_dev_addr *dev_addr; | |
2847 | struct cma_ndev_work *work; | |
2848 | ||
2849 | dev_addr = &id_priv->id.route.addr.dev_addr; | |
2850 | ||
6266ed6e | 2851 | if ((dev_addr->bound_dev_if == ndev->ifindex) && |
dd5bdff8 OG |
2852 | memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) { |
2853 | printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n", | |
2854 | ndev->name, &id_priv->id); | |
2855 | work = kzalloc(sizeof *work, GFP_KERNEL); | |
2856 | if (!work) | |
2857 | return -ENOMEM; | |
2858 | ||
2859 | INIT_WORK(&work->work, cma_ndev_work_handler); | |
2860 | work->id = id_priv; | |
2861 | work->event.event = RDMA_CM_EVENT_ADDR_CHANGE; | |
2862 | atomic_inc(&id_priv->refcount); | |
2863 | queue_work(cma_wq, &work->work); | |
2864 | } | |
2865 | ||
2866 | return 0; | |
2867 | } | |
2868 | ||
2869 | static int cma_netdev_callback(struct notifier_block *self, unsigned long event, | |
2870 | void *ctx) | |
2871 | { | |
2872 | struct net_device *ndev = (struct net_device *)ctx; | |
2873 | struct cma_device *cma_dev; | |
2874 | struct rdma_id_private *id_priv; | |
2875 | int ret = NOTIFY_DONE; | |
2876 | ||
2877 | if (dev_net(ndev) != &init_net) | |
2878 | return NOTIFY_DONE; | |
2879 | ||
2880 | if (event != NETDEV_BONDING_FAILOVER) | |
2881 | return NOTIFY_DONE; | |
2882 | ||
2883 | if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING)) | |
2884 | return NOTIFY_DONE; | |
2885 | ||
2886 | mutex_lock(&lock); | |
2887 | list_for_each_entry(cma_dev, &dev_list, list) | |
2888 | list_for_each_entry(id_priv, &cma_dev->id_list, list) { | |
2889 | ret = cma_netdev_change(ndev, id_priv); | |
2890 | if (ret) | |
2891 | goto out; | |
2892 | } | |
2893 | ||
2894 | out: | |
2895 | mutex_unlock(&lock); | |
2896 | return ret; | |
2897 | } | |
2898 | ||
2899 | static struct notifier_block cma_nb = { | |
2900 | .notifier_call = cma_netdev_callback | |
2901 | }; | |
2902 | ||
e51060f0 SH |
2903 | static void cma_add_one(struct ib_device *device) |
2904 | { | |
2905 | struct cma_device *cma_dev; | |
2906 | struct rdma_id_private *id_priv; | |
2907 | ||
2908 | cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL); | |
2909 | if (!cma_dev) | |
2910 | return; | |
2911 | ||
2912 | cma_dev->device = device; | |
e51060f0 SH |
2913 | |
2914 | init_completion(&cma_dev->comp); | |
2915 | atomic_set(&cma_dev->refcount, 1); | |
2916 | INIT_LIST_HEAD(&cma_dev->id_list); | |
2917 | ib_set_client_data(device, &cma_client, cma_dev); | |
2918 | ||
2919 | mutex_lock(&lock); | |
2920 | list_add_tail(&cma_dev->list, &dev_list); | |
2921 | list_for_each_entry(id_priv, &listen_any_list, list) | |
2922 | cma_listen_on_dev(id_priv, cma_dev); | |
2923 | mutex_unlock(&lock); | |
e51060f0 SH |
2924 | } |
2925 | ||
2926 | static int cma_remove_id_dev(struct rdma_id_private *id_priv) | |
2927 | { | |
a1b1b61f | 2928 | struct rdma_cm_event event; |
e51060f0 | 2929 | enum cma_state state; |
de910bd9 | 2930 | int ret = 0; |
e51060f0 SH |
2931 | |
2932 | /* Record that we want to remove the device */ | |
2933 | state = cma_exch(id_priv, CMA_DEVICE_REMOVAL); | |
2934 | if (state == CMA_DESTROYING) | |
2935 | return 0; | |
2936 | ||
2937 | cma_cancel_operation(id_priv, state); | |
de910bd9 | 2938 | mutex_lock(&id_priv->handler_mutex); |
e51060f0 SH |
2939 | |
2940 | /* Check for destruction from another callback. */ | |
2941 | if (!cma_comp(id_priv, CMA_DEVICE_REMOVAL)) | |
de910bd9 | 2942 | goto out; |
e51060f0 | 2943 | |
a1b1b61f SH |
2944 | memset(&event, 0, sizeof event); |
2945 | event.event = RDMA_CM_EVENT_DEVICE_REMOVAL; | |
de910bd9 OG |
2946 | ret = id_priv->id.event_handler(&id_priv->id, &event); |
2947 | out: | |
2948 | mutex_unlock(&id_priv->handler_mutex); | |
2949 | return ret; | |
e51060f0 SH |
2950 | } |
2951 | ||
2952 | static void cma_process_remove(struct cma_device *cma_dev) | |
2953 | { | |
e51060f0 SH |
2954 | struct rdma_id_private *id_priv; |
2955 | int ret; | |
2956 | ||
e51060f0 SH |
2957 | mutex_lock(&lock); |
2958 | while (!list_empty(&cma_dev->id_list)) { | |
2959 | id_priv = list_entry(cma_dev->id_list.next, | |
2960 | struct rdma_id_private, list); | |
2961 | ||
d02d1f53 | 2962 | list_del(&id_priv->listen_list); |
94de178a | 2963 | list_del_init(&id_priv->list); |
e51060f0 SH |
2964 | atomic_inc(&id_priv->refcount); |
2965 | mutex_unlock(&lock); | |
2966 | ||
d02d1f53 | 2967 | ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv); |
e51060f0 SH |
2968 | cma_deref_id(id_priv); |
2969 | if (ret) | |
2970 | rdma_destroy_id(&id_priv->id); | |
2971 | ||
2972 | mutex_lock(&lock); | |
2973 | } | |
2974 | mutex_unlock(&lock); | |
2975 | ||
2976 | cma_deref_dev(cma_dev); | |
2977 | wait_for_completion(&cma_dev->comp); | |
2978 | } | |
2979 | ||
2980 | static void cma_remove_one(struct ib_device *device) | |
2981 | { | |
2982 | struct cma_device *cma_dev; | |
2983 | ||
2984 | cma_dev = ib_get_client_data(device, &cma_client); | |
2985 | if (!cma_dev) | |
2986 | return; | |
2987 | ||
2988 | mutex_lock(&lock); | |
2989 | list_del(&cma_dev->list); | |
2990 | mutex_unlock(&lock); | |
2991 | ||
2992 | cma_process_remove(cma_dev); | |
2993 | kfree(cma_dev); | |
2994 | } | |
2995 | ||
716abb1f | 2996 | static int __init cma_init(void) |
e51060f0 | 2997 | { |
a25de534 | 2998 | int ret, low, high, remaining; |
e51060f0 | 2999 | |
aedec080 | 3000 | get_random_bytes(&next_port, sizeof next_port); |
227b60f5 | 3001 | inet_get_local_port_range(&low, &high); |
a25de534 AA |
3002 | remaining = (high - low) + 1; |
3003 | next_port = ((unsigned int) next_port % remaining) + low; | |
227b60f5 | 3004 | |
c7f743a6 | 3005 | cma_wq = create_singlethread_workqueue("rdma_cm"); |
e51060f0 SH |
3006 | if (!cma_wq) |
3007 | return -ENOMEM; | |
3008 | ||
c1a0b23b | 3009 | ib_sa_register_client(&sa_client); |
7a118df3 | 3010 | rdma_addr_register_client(&addr_client); |
dd5bdff8 | 3011 | register_netdevice_notifier(&cma_nb); |
c1a0b23b | 3012 | |
e51060f0 SH |
3013 | ret = ib_register_client(&cma_client); |
3014 | if (ret) | |
3015 | goto err; | |
3016 | return 0; | |
3017 | ||
3018 | err: | |
dd5bdff8 | 3019 | unregister_netdevice_notifier(&cma_nb); |
7a118df3 | 3020 | rdma_addr_unregister_client(&addr_client); |
c1a0b23b | 3021 | ib_sa_unregister_client(&sa_client); |
e51060f0 SH |
3022 | destroy_workqueue(cma_wq); |
3023 | return ret; | |
3024 | } | |
3025 | ||
716abb1f | 3026 | static void __exit cma_cleanup(void) |
e51060f0 SH |
3027 | { |
3028 | ib_unregister_client(&cma_client); | |
dd5bdff8 | 3029 | unregister_netdevice_notifier(&cma_nb); |
7a118df3 | 3030 | rdma_addr_unregister_client(&addr_client); |
c1a0b23b | 3031 | ib_sa_unregister_client(&sa_client); |
e51060f0 SH |
3032 | destroy_workqueue(cma_wq); |
3033 | idr_destroy(&sdp_ps); | |
3034 | idr_destroy(&tcp_ps); | |
628e5f6d | 3035 | idr_destroy(&udp_ps); |
c8f6a362 | 3036 | idr_destroy(&ipoib_ps); |
e51060f0 SH |
3037 | } |
3038 | ||
3039 | module_init(cma_init); | |
3040 | module_exit(cma_cleanup); |