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); |
e51060f0 SH |
82 | |
83 | struct cma_device { | |
84 | struct list_head list; | |
85 | struct ib_device *device; | |
e51060f0 SH |
86 | struct completion comp; |
87 | atomic_t refcount; | |
88 | struct list_head id_list; | |
89 | }; | |
90 | ||
91 | enum cma_state { | |
92 | CMA_IDLE, | |
93 | CMA_ADDR_QUERY, | |
94 | CMA_ADDR_RESOLVED, | |
95 | CMA_ROUTE_QUERY, | |
96 | CMA_ROUTE_RESOLVED, | |
97 | CMA_CONNECT, | |
98 | CMA_DISCONNECT, | |
99 | CMA_ADDR_BOUND, | |
100 | CMA_LISTEN, | |
101 | CMA_DEVICE_REMOVAL, | |
102 | CMA_DESTROYING | |
103 | }; | |
104 | ||
105 | struct rdma_bind_list { | |
106 | struct idr *ps; | |
107 | struct hlist_head owners; | |
108 | unsigned short port; | |
109 | }; | |
110 | ||
111 | /* | |
112 | * Device removal can occur at anytime, so we need extra handling to | |
113 | * serialize notifying the user of device removal with other callbacks. | |
114 | * We do this by disabling removal notification while a callback is in process, | |
115 | * and reporting it after the callback completes. | |
116 | */ | |
117 | struct rdma_id_private { | |
118 | struct rdma_cm_id id; | |
119 | ||
120 | struct rdma_bind_list *bind_list; | |
121 | struct hlist_node node; | |
d02d1f53 SH |
122 | struct list_head list; /* listen_any_list or cma_device.list */ |
123 | struct list_head listen_list; /* per device listens */ | |
e51060f0 | 124 | struct cma_device *cma_dev; |
c8f6a362 | 125 | struct list_head mc_list; |
e51060f0 | 126 | |
d02d1f53 | 127 | int internal_id; |
e51060f0 SH |
128 | enum cma_state state; |
129 | spinlock_t lock; | |
c5483388 SH |
130 | struct mutex qp_mutex; |
131 | ||
e51060f0 SH |
132 | struct completion comp; |
133 | atomic_t refcount; | |
de910bd9 | 134 | struct mutex handler_mutex; |
e51060f0 SH |
135 | |
136 | int backlog; | |
137 | int timeout_ms; | |
138 | struct ib_sa_query *query; | |
139 | int query_id; | |
140 | union { | |
141 | struct ib_cm_id *ib; | |
07ebafba | 142 | struct iw_cm_id *iw; |
e51060f0 SH |
143 | } cm_id; |
144 | ||
145 | u32 seq_num; | |
c8f6a362 | 146 | u32 qkey; |
e51060f0 | 147 | u32 qp_num; |
e51060f0 | 148 | u8 srq; |
a81c994d | 149 | u8 tos; |
e51060f0 SH |
150 | }; |
151 | ||
c8f6a362 SH |
152 | struct cma_multicast { |
153 | struct rdma_id_private *id_priv; | |
154 | union { | |
155 | struct ib_sa_multicast *ib; | |
156 | } multicast; | |
157 | struct list_head list; | |
158 | void *context; | |
3f446754 | 159 | struct sockaddr_storage addr; |
c8f6a362 SH |
160 | }; |
161 | ||
e51060f0 SH |
162 | struct cma_work { |
163 | struct work_struct work; | |
164 | struct rdma_id_private *id; | |
165 | enum cma_state old_state; | |
166 | enum cma_state new_state; | |
167 | struct rdma_cm_event event; | |
168 | }; | |
169 | ||
dd5bdff8 OG |
170 | struct cma_ndev_work { |
171 | struct work_struct work; | |
172 | struct rdma_id_private *id; | |
173 | struct rdma_cm_event event; | |
174 | }; | |
175 | ||
e51060f0 SH |
176 | union cma_ip_addr { |
177 | struct in6_addr ip6; | |
178 | struct { | |
1b90c137 AV |
179 | __be32 pad[3]; |
180 | __be32 addr; | |
e51060f0 SH |
181 | } ip4; |
182 | }; | |
183 | ||
184 | struct cma_hdr { | |
185 | u8 cma_version; | |
186 | u8 ip_version; /* IP version: 7:4 */ | |
1b90c137 | 187 | __be16 port; |
e51060f0 SH |
188 | union cma_ip_addr src_addr; |
189 | union cma_ip_addr dst_addr; | |
190 | }; | |
191 | ||
192 | struct sdp_hh { | |
193 | u8 bsdh[16]; | |
194 | u8 sdp_version; /* Major version: 7:4 */ | |
195 | u8 ip_version; /* IP version: 7:4 */ | |
196 | u8 sdp_specific1[10]; | |
1b90c137 AV |
197 | __be16 port; |
198 | __be16 sdp_specific2; | |
e51060f0 SH |
199 | union cma_ip_addr src_addr; |
200 | union cma_ip_addr dst_addr; | |
201 | }; | |
202 | ||
203 | struct sdp_hah { | |
204 | u8 bsdh[16]; | |
205 | u8 sdp_version; | |
206 | }; | |
207 | ||
208 | #define CMA_VERSION 0x00 | |
209 | #define SDP_MAJ_VERSION 0x2 | |
210 | ||
211 | static int cma_comp(struct rdma_id_private *id_priv, enum cma_state comp) | |
212 | { | |
213 | unsigned long flags; | |
214 | int ret; | |
215 | ||
216 | spin_lock_irqsave(&id_priv->lock, flags); | |
217 | ret = (id_priv->state == comp); | |
218 | spin_unlock_irqrestore(&id_priv->lock, flags); | |
219 | return ret; | |
220 | } | |
221 | ||
222 | static int cma_comp_exch(struct rdma_id_private *id_priv, | |
223 | enum cma_state comp, enum cma_state exch) | |
224 | { | |
225 | unsigned long flags; | |
226 | int ret; | |
227 | ||
228 | spin_lock_irqsave(&id_priv->lock, flags); | |
229 | if ((ret = (id_priv->state == comp))) | |
230 | id_priv->state = exch; | |
231 | spin_unlock_irqrestore(&id_priv->lock, flags); | |
232 | return ret; | |
233 | } | |
234 | ||
235 | static enum cma_state cma_exch(struct rdma_id_private *id_priv, | |
236 | enum cma_state exch) | |
237 | { | |
238 | unsigned long flags; | |
239 | enum cma_state old; | |
240 | ||
241 | spin_lock_irqsave(&id_priv->lock, flags); | |
242 | old = id_priv->state; | |
243 | id_priv->state = exch; | |
244 | spin_unlock_irqrestore(&id_priv->lock, flags); | |
245 | return old; | |
246 | } | |
247 | ||
248 | static inline u8 cma_get_ip_ver(struct cma_hdr *hdr) | |
249 | { | |
250 | return hdr->ip_version >> 4; | |
251 | } | |
252 | ||
253 | static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver) | |
254 | { | |
255 | hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF); | |
256 | } | |
257 | ||
258 | static inline u8 sdp_get_majv(u8 sdp_version) | |
259 | { | |
260 | return sdp_version >> 4; | |
261 | } | |
262 | ||
263 | static inline u8 sdp_get_ip_ver(struct sdp_hh *hh) | |
264 | { | |
265 | return hh->ip_version >> 4; | |
266 | } | |
267 | ||
268 | static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver) | |
269 | { | |
270 | hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF); | |
271 | } | |
272 | ||
c8f6a362 SH |
273 | static inline int cma_is_ud_ps(enum rdma_port_space ps) |
274 | { | |
275 | return (ps == RDMA_PS_UDP || ps == RDMA_PS_IPOIB); | |
276 | } | |
277 | ||
e51060f0 SH |
278 | static void cma_attach_to_dev(struct rdma_id_private *id_priv, |
279 | struct cma_device *cma_dev) | |
280 | { | |
281 | atomic_inc(&cma_dev->refcount); | |
282 | id_priv->cma_dev = cma_dev; | |
283 | id_priv->id.device = cma_dev->device; | |
284 | list_add_tail(&id_priv->list, &cma_dev->id_list); | |
285 | } | |
286 | ||
287 | static inline void cma_deref_dev(struct cma_device *cma_dev) | |
288 | { | |
289 | if (atomic_dec_and_test(&cma_dev->refcount)) | |
290 | complete(&cma_dev->comp); | |
291 | } | |
292 | ||
293 | static void cma_detach_from_dev(struct rdma_id_private *id_priv) | |
294 | { | |
295 | list_del(&id_priv->list); | |
296 | cma_deref_dev(id_priv->cma_dev); | |
297 | id_priv->cma_dev = NULL; | |
298 | } | |
299 | ||
d2ca39f2 | 300 | static int cma_set_qkey(struct rdma_id_private *id_priv) |
c8f6a362 SH |
301 | { |
302 | struct ib_sa_mcmember_rec rec; | |
303 | int ret = 0; | |
304 | ||
d2ca39f2 YE |
305 | if (id_priv->qkey) |
306 | return 0; | |
307 | ||
308 | switch (id_priv->id.ps) { | |
c8f6a362 | 309 | case RDMA_PS_UDP: |
d2ca39f2 | 310 | id_priv->qkey = RDMA_UDP_QKEY; |
c8f6a362 SH |
311 | break; |
312 | case RDMA_PS_IPOIB: | |
d2ca39f2 YE |
313 | ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid); |
314 | ret = ib_sa_get_mcmember_rec(id_priv->id.device, | |
315 | id_priv->id.port_num, &rec.mgid, | |
316 | &rec); | |
317 | if (!ret) | |
318 | id_priv->qkey = be32_to_cpu(rec.qkey); | |
c8f6a362 SH |
319 | break; |
320 | default: | |
321 | break; | |
322 | } | |
323 | return ret; | |
324 | } | |
325 | ||
07ebafba | 326 | static int cma_acquire_dev(struct rdma_id_private *id_priv) |
e51060f0 | 327 | { |
c8f6a362 | 328 | struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; |
e51060f0 | 329 | struct cma_device *cma_dev; |
f0ee3404 | 330 | union ib_gid gid; |
e51060f0 SH |
331 | int ret = -ENODEV; |
332 | ||
6f8372b6 | 333 | rdma_addr_get_sgid(dev_addr, &gid); |
e51060f0 | 334 | list_for_each_entry(cma_dev, &dev_list, list) { |
f0ee3404 | 335 | ret = ib_find_cached_gid(cma_dev->device, &gid, |
e51060f0 SH |
336 | &id_priv->id.port_num, NULL); |
337 | if (!ret) { | |
d2ca39f2 | 338 | cma_attach_to_dev(id_priv, cma_dev); |
e51060f0 SH |
339 | break; |
340 | } | |
341 | } | |
e51060f0 SH |
342 | return ret; |
343 | } | |
344 | ||
e51060f0 SH |
345 | static void cma_deref_id(struct rdma_id_private *id_priv) |
346 | { | |
347 | if (atomic_dec_and_test(&id_priv->refcount)) | |
348 | complete(&id_priv->comp); | |
349 | } | |
350 | ||
de910bd9 | 351 | static int cma_disable_callback(struct rdma_id_private *id_priv, |
8aa08602 SH |
352 | enum cma_state state) |
353 | { | |
de910bd9 OG |
354 | mutex_lock(&id_priv->handler_mutex); |
355 | if (id_priv->state != state) { | |
356 | mutex_unlock(&id_priv->handler_mutex); | |
357 | return -EINVAL; | |
358 | } | |
359 | return 0; | |
e51060f0 SH |
360 | } |
361 | ||
6c719f5c SH |
362 | static int cma_has_cm_dev(struct rdma_id_private *id_priv) |
363 | { | |
364 | return (id_priv->id.device && id_priv->cm_id.ib); | |
365 | } | |
366 | ||
e51060f0 SH |
367 | struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler, |
368 | void *context, enum rdma_port_space ps) | |
369 | { | |
370 | struct rdma_id_private *id_priv; | |
371 | ||
372 | id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL); | |
373 | if (!id_priv) | |
374 | return ERR_PTR(-ENOMEM); | |
375 | ||
376 | id_priv->state = CMA_IDLE; | |
377 | id_priv->id.context = context; | |
378 | id_priv->id.event_handler = event_handler; | |
379 | id_priv->id.ps = ps; | |
380 | spin_lock_init(&id_priv->lock); | |
c5483388 | 381 | mutex_init(&id_priv->qp_mutex); |
e51060f0 SH |
382 | init_completion(&id_priv->comp); |
383 | atomic_set(&id_priv->refcount, 1); | |
de910bd9 | 384 | mutex_init(&id_priv->handler_mutex); |
e51060f0 | 385 | INIT_LIST_HEAD(&id_priv->listen_list); |
c8f6a362 | 386 | INIT_LIST_HEAD(&id_priv->mc_list); |
e51060f0 SH |
387 | get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num); |
388 | ||
389 | return &id_priv->id; | |
390 | } | |
391 | EXPORT_SYMBOL(rdma_create_id); | |
392 | ||
c8f6a362 | 393 | static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) |
e51060f0 SH |
394 | { |
395 | struct ib_qp_attr qp_attr; | |
c8f6a362 | 396 | int qp_attr_mask, ret; |
e51060f0 | 397 | |
c8f6a362 SH |
398 | qp_attr.qp_state = IB_QPS_INIT; |
399 | ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); | |
e51060f0 SH |
400 | if (ret) |
401 | return ret; | |
402 | ||
c8f6a362 SH |
403 | ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); |
404 | if (ret) | |
405 | return ret; | |
406 | ||
407 | qp_attr.qp_state = IB_QPS_RTR; | |
408 | ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE); | |
409 | if (ret) | |
410 | return ret; | |
411 | ||
412 | qp_attr.qp_state = IB_QPS_RTS; | |
413 | qp_attr.sq_psn = 0; | |
414 | ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN); | |
415 | ||
416 | return ret; | |
e51060f0 SH |
417 | } |
418 | ||
c8f6a362 | 419 | static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) |
07ebafba TT |
420 | { |
421 | struct ib_qp_attr qp_attr; | |
c8f6a362 | 422 | int qp_attr_mask, ret; |
07ebafba TT |
423 | |
424 | qp_attr.qp_state = IB_QPS_INIT; | |
c8f6a362 SH |
425 | ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); |
426 | if (ret) | |
427 | return ret; | |
07ebafba | 428 | |
c8f6a362 | 429 | return ib_modify_qp(qp, &qp_attr, qp_attr_mask); |
07ebafba TT |
430 | } |
431 | ||
e51060f0 SH |
432 | int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd, |
433 | struct ib_qp_init_attr *qp_init_attr) | |
434 | { | |
435 | struct rdma_id_private *id_priv; | |
436 | struct ib_qp *qp; | |
437 | int ret; | |
438 | ||
439 | id_priv = container_of(id, struct rdma_id_private, id); | |
440 | if (id->device != pd->device) | |
441 | return -EINVAL; | |
442 | ||
443 | qp = ib_create_qp(pd, qp_init_attr); | |
444 | if (IS_ERR(qp)) | |
445 | return PTR_ERR(qp); | |
446 | ||
c8f6a362 SH |
447 | if (cma_is_ud_ps(id_priv->id.ps)) |
448 | ret = cma_init_ud_qp(id_priv, qp); | |
449 | else | |
450 | ret = cma_init_conn_qp(id_priv, qp); | |
e51060f0 SH |
451 | if (ret) |
452 | goto err; | |
453 | ||
454 | id->qp = qp; | |
455 | id_priv->qp_num = qp->qp_num; | |
e51060f0 SH |
456 | id_priv->srq = (qp->srq != NULL); |
457 | return 0; | |
458 | err: | |
459 | ib_destroy_qp(qp); | |
460 | return ret; | |
461 | } | |
462 | EXPORT_SYMBOL(rdma_create_qp); | |
463 | ||
464 | void rdma_destroy_qp(struct rdma_cm_id *id) | |
465 | { | |
c5483388 SH |
466 | struct rdma_id_private *id_priv; |
467 | ||
468 | id_priv = container_of(id, struct rdma_id_private, id); | |
469 | mutex_lock(&id_priv->qp_mutex); | |
470 | ib_destroy_qp(id_priv->id.qp); | |
471 | id_priv->id.qp = NULL; | |
472 | mutex_unlock(&id_priv->qp_mutex); | |
e51060f0 SH |
473 | } |
474 | EXPORT_SYMBOL(rdma_destroy_qp); | |
475 | ||
5851bb89 SH |
476 | static int cma_modify_qp_rtr(struct rdma_id_private *id_priv, |
477 | struct rdma_conn_param *conn_param) | |
e51060f0 SH |
478 | { |
479 | struct ib_qp_attr qp_attr; | |
480 | int qp_attr_mask, ret; | |
481 | ||
c5483388 SH |
482 | mutex_lock(&id_priv->qp_mutex); |
483 | if (!id_priv->id.qp) { | |
484 | ret = 0; | |
485 | goto out; | |
486 | } | |
e51060f0 SH |
487 | |
488 | /* Need to update QP attributes from default values. */ | |
489 | qp_attr.qp_state = IB_QPS_INIT; | |
c5483388 | 490 | ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); |
e51060f0 | 491 | if (ret) |
c5483388 | 492 | goto out; |
e51060f0 | 493 | |
c5483388 | 494 | ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); |
e51060f0 | 495 | if (ret) |
c5483388 | 496 | goto out; |
e51060f0 SH |
497 | |
498 | qp_attr.qp_state = IB_QPS_RTR; | |
c5483388 | 499 | ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); |
e51060f0 | 500 | if (ret) |
c5483388 | 501 | goto out; |
e51060f0 | 502 | |
5851bb89 SH |
503 | if (conn_param) |
504 | qp_attr.max_dest_rd_atomic = conn_param->responder_resources; | |
c5483388 SH |
505 | ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); |
506 | out: | |
507 | mutex_unlock(&id_priv->qp_mutex); | |
508 | return ret; | |
e51060f0 SH |
509 | } |
510 | ||
5851bb89 SH |
511 | static int cma_modify_qp_rts(struct rdma_id_private *id_priv, |
512 | struct rdma_conn_param *conn_param) | |
e51060f0 SH |
513 | { |
514 | struct ib_qp_attr qp_attr; | |
515 | int qp_attr_mask, ret; | |
516 | ||
c5483388 SH |
517 | mutex_lock(&id_priv->qp_mutex); |
518 | if (!id_priv->id.qp) { | |
519 | ret = 0; | |
520 | goto out; | |
521 | } | |
e51060f0 SH |
522 | |
523 | qp_attr.qp_state = IB_QPS_RTS; | |
c5483388 | 524 | ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); |
e51060f0 | 525 | if (ret) |
c5483388 | 526 | goto out; |
e51060f0 | 527 | |
5851bb89 SH |
528 | if (conn_param) |
529 | qp_attr.max_rd_atomic = conn_param->initiator_depth; | |
c5483388 SH |
530 | ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); |
531 | out: | |
532 | mutex_unlock(&id_priv->qp_mutex); | |
533 | return ret; | |
e51060f0 SH |
534 | } |
535 | ||
c5483388 | 536 | static int cma_modify_qp_err(struct rdma_id_private *id_priv) |
e51060f0 SH |
537 | { |
538 | struct ib_qp_attr qp_attr; | |
c5483388 | 539 | int ret; |
e51060f0 | 540 | |
c5483388 SH |
541 | mutex_lock(&id_priv->qp_mutex); |
542 | if (!id_priv->id.qp) { | |
543 | ret = 0; | |
544 | goto out; | |
545 | } | |
e51060f0 SH |
546 | |
547 | qp_attr.qp_state = IB_QPS_ERR; | |
c5483388 SH |
548 | ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE); |
549 | out: | |
550 | mutex_unlock(&id_priv->qp_mutex); | |
551 | return ret; | |
e51060f0 SH |
552 | } |
553 | ||
c8f6a362 SH |
554 | static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv, |
555 | struct ib_qp_attr *qp_attr, int *qp_attr_mask) | |
556 | { | |
557 | struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; | |
558 | int ret; | |
559 | ||
560 | ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num, | |
561 | ib_addr_get_pkey(dev_addr), | |
562 | &qp_attr->pkey_index); | |
563 | if (ret) | |
564 | return ret; | |
565 | ||
566 | qp_attr->port_num = id_priv->id.port_num; | |
567 | *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT; | |
568 | ||
569 | if (cma_is_ud_ps(id_priv->id.ps)) { | |
d2ca39f2 YE |
570 | ret = cma_set_qkey(id_priv); |
571 | if (ret) | |
572 | return ret; | |
573 | ||
c8f6a362 SH |
574 | qp_attr->qkey = id_priv->qkey; |
575 | *qp_attr_mask |= IB_QP_QKEY; | |
576 | } else { | |
577 | qp_attr->qp_access_flags = 0; | |
578 | *qp_attr_mask |= IB_QP_ACCESS_FLAGS; | |
579 | } | |
580 | return 0; | |
581 | } | |
582 | ||
e51060f0 SH |
583 | int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr, |
584 | int *qp_attr_mask) | |
585 | { | |
586 | struct rdma_id_private *id_priv; | |
c8f6a362 | 587 | int ret = 0; |
e51060f0 SH |
588 | |
589 | id_priv = container_of(id, struct rdma_id_private, id); | |
07ebafba TT |
590 | switch (rdma_node_get_transport(id_priv->id.device->node_type)) { |
591 | case RDMA_TRANSPORT_IB: | |
c8f6a362 SH |
592 | if (!id_priv->cm_id.ib || cma_is_ud_ps(id_priv->id.ps)) |
593 | ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask); | |
594 | else | |
595 | ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr, | |
596 | qp_attr_mask); | |
e51060f0 SH |
597 | if (qp_attr->qp_state == IB_QPS_RTR) |
598 | qp_attr->rq_psn = id_priv->seq_num; | |
599 | break; | |
07ebafba | 600 | case RDMA_TRANSPORT_IWARP: |
c8f6a362 | 601 | if (!id_priv->cm_id.iw) { |
8f076531 | 602 | qp_attr->qp_access_flags = 0; |
c8f6a362 SH |
603 | *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS; |
604 | } else | |
605 | ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr, | |
606 | qp_attr_mask); | |
07ebafba | 607 | break; |
e51060f0 SH |
608 | default: |
609 | ret = -ENOSYS; | |
610 | break; | |
611 | } | |
612 | ||
613 | return ret; | |
614 | } | |
615 | EXPORT_SYMBOL(rdma_init_qp_attr); | |
616 | ||
617 | static inline int cma_zero_addr(struct sockaddr *addr) | |
618 | { | |
619 | struct in6_addr *ip6; | |
620 | ||
621 | if (addr->sa_family == AF_INET) | |
6360a02a JP |
622 | return ipv4_is_zeronet( |
623 | ((struct sockaddr_in *)addr)->sin_addr.s_addr); | |
e51060f0 SH |
624 | else { |
625 | ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr; | |
626 | return (ip6->s6_addr32[0] | ip6->s6_addr32[1] | | |
5fd571cb | 627 | ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0; |
e51060f0 SH |
628 | } |
629 | } | |
630 | ||
631 | static inline int cma_loopback_addr(struct sockaddr *addr) | |
632 | { | |
1f5175ad AS |
633 | if (addr->sa_family == AF_INET) |
634 | return ipv4_is_loopback( | |
635 | ((struct sockaddr_in *) addr)->sin_addr.s_addr); | |
636 | else | |
637 | return ipv6_addr_loopback( | |
638 | &((struct sockaddr_in6 *) addr)->sin6_addr); | |
e51060f0 SH |
639 | } |
640 | ||
641 | static inline int cma_any_addr(struct sockaddr *addr) | |
642 | { | |
643 | return cma_zero_addr(addr) || cma_loopback_addr(addr); | |
644 | } | |
645 | ||
628e5f6d SH |
646 | static inline __be16 cma_port(struct sockaddr *addr) |
647 | { | |
648 | if (addr->sa_family == AF_INET) | |
649 | return ((struct sockaddr_in *) addr)->sin_port; | |
650 | else | |
651 | return ((struct sockaddr_in6 *) addr)->sin6_port; | |
652 | } | |
653 | ||
e51060f0 SH |
654 | static inline int cma_any_port(struct sockaddr *addr) |
655 | { | |
628e5f6d | 656 | return !cma_port(addr); |
e51060f0 SH |
657 | } |
658 | ||
659 | static int cma_get_net_info(void *hdr, enum rdma_port_space ps, | |
1b90c137 | 660 | u8 *ip_ver, __be16 *port, |
e51060f0 SH |
661 | union cma_ip_addr **src, union cma_ip_addr **dst) |
662 | { | |
663 | switch (ps) { | |
664 | case RDMA_PS_SDP: | |
665 | if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) != | |
666 | SDP_MAJ_VERSION) | |
667 | return -EINVAL; | |
668 | ||
669 | *ip_ver = sdp_get_ip_ver(hdr); | |
670 | *port = ((struct sdp_hh *) hdr)->port; | |
671 | *src = &((struct sdp_hh *) hdr)->src_addr; | |
672 | *dst = &((struct sdp_hh *) hdr)->dst_addr; | |
673 | break; | |
674 | default: | |
675 | if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION) | |
676 | return -EINVAL; | |
677 | ||
678 | *ip_ver = cma_get_ip_ver(hdr); | |
679 | *port = ((struct cma_hdr *) hdr)->port; | |
680 | *src = &((struct cma_hdr *) hdr)->src_addr; | |
681 | *dst = &((struct cma_hdr *) hdr)->dst_addr; | |
682 | break; | |
683 | } | |
684 | ||
685 | if (*ip_ver != 4 && *ip_ver != 6) | |
686 | return -EINVAL; | |
687 | return 0; | |
688 | } | |
689 | ||
690 | static void cma_save_net_info(struct rdma_addr *addr, | |
691 | struct rdma_addr *listen_addr, | |
1b90c137 | 692 | u8 ip_ver, __be16 port, |
e51060f0 SH |
693 | union cma_ip_addr *src, union cma_ip_addr *dst) |
694 | { | |
695 | struct sockaddr_in *listen4, *ip4; | |
696 | struct sockaddr_in6 *listen6, *ip6; | |
697 | ||
698 | switch (ip_ver) { | |
699 | case 4: | |
700 | listen4 = (struct sockaddr_in *) &listen_addr->src_addr; | |
701 | ip4 = (struct sockaddr_in *) &addr->src_addr; | |
702 | ip4->sin_family = listen4->sin_family; | |
703 | ip4->sin_addr.s_addr = dst->ip4.addr; | |
704 | ip4->sin_port = listen4->sin_port; | |
705 | ||
706 | ip4 = (struct sockaddr_in *) &addr->dst_addr; | |
707 | ip4->sin_family = listen4->sin_family; | |
708 | ip4->sin_addr.s_addr = src->ip4.addr; | |
709 | ip4->sin_port = port; | |
710 | break; | |
711 | case 6: | |
712 | listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr; | |
713 | ip6 = (struct sockaddr_in6 *) &addr->src_addr; | |
714 | ip6->sin6_family = listen6->sin6_family; | |
715 | ip6->sin6_addr = dst->ip6; | |
716 | ip6->sin6_port = listen6->sin6_port; | |
717 | ||
718 | ip6 = (struct sockaddr_in6 *) &addr->dst_addr; | |
719 | ip6->sin6_family = listen6->sin6_family; | |
720 | ip6->sin6_addr = src->ip6; | |
721 | ip6->sin6_port = port; | |
722 | break; | |
723 | default: | |
724 | break; | |
725 | } | |
726 | } | |
727 | ||
728 | static inline int cma_user_data_offset(enum rdma_port_space ps) | |
729 | { | |
730 | switch (ps) { | |
731 | case RDMA_PS_SDP: | |
732 | return 0; | |
733 | default: | |
734 | return sizeof(struct cma_hdr); | |
735 | } | |
736 | } | |
737 | ||
e51060f0 SH |
738 | static void cma_cancel_route(struct rdma_id_private *id_priv) |
739 | { | |
07ebafba TT |
740 | switch (rdma_node_get_transport(id_priv->id.device->node_type)) { |
741 | case RDMA_TRANSPORT_IB: | |
e51060f0 SH |
742 | if (id_priv->query) |
743 | ib_sa_cancel_query(id_priv->query_id, id_priv->query); | |
744 | break; | |
745 | default: | |
746 | break; | |
747 | } | |
748 | } | |
749 | ||
e51060f0 SH |
750 | static void cma_cancel_listens(struct rdma_id_private *id_priv) |
751 | { | |
752 | struct rdma_id_private *dev_id_priv; | |
753 | ||
d02d1f53 SH |
754 | /* |
755 | * Remove from listen_any_list to prevent added devices from spawning | |
756 | * additional listen requests. | |
757 | */ | |
e51060f0 SH |
758 | mutex_lock(&lock); |
759 | list_del(&id_priv->list); | |
760 | ||
761 | while (!list_empty(&id_priv->listen_list)) { | |
762 | dev_id_priv = list_entry(id_priv->listen_list.next, | |
763 | struct rdma_id_private, listen_list); | |
d02d1f53 SH |
764 | /* sync with device removal to avoid duplicate destruction */ |
765 | list_del_init(&dev_id_priv->list); | |
766 | list_del(&dev_id_priv->listen_list); | |
767 | mutex_unlock(&lock); | |
768 | ||
769 | rdma_destroy_id(&dev_id_priv->id); | |
770 | mutex_lock(&lock); | |
e51060f0 SH |
771 | } |
772 | mutex_unlock(&lock); | |
773 | } | |
774 | ||
775 | static void cma_cancel_operation(struct rdma_id_private *id_priv, | |
776 | enum cma_state state) | |
777 | { | |
778 | switch (state) { | |
779 | case CMA_ADDR_QUERY: | |
780 | rdma_addr_cancel(&id_priv->id.route.addr.dev_addr); | |
781 | break; | |
782 | case CMA_ROUTE_QUERY: | |
783 | cma_cancel_route(id_priv); | |
784 | break; | |
785 | case CMA_LISTEN: | |
3f446754 RD |
786 | if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr) |
787 | && !id_priv->cma_dev) | |
e51060f0 SH |
788 | cma_cancel_listens(id_priv); |
789 | break; | |
790 | default: | |
791 | break; | |
792 | } | |
793 | } | |
794 | ||
795 | static void cma_release_port(struct rdma_id_private *id_priv) | |
796 | { | |
797 | struct rdma_bind_list *bind_list = id_priv->bind_list; | |
798 | ||
799 | if (!bind_list) | |
800 | return; | |
801 | ||
802 | mutex_lock(&lock); | |
803 | hlist_del(&id_priv->node); | |
804 | if (hlist_empty(&bind_list->owners)) { | |
805 | idr_remove(bind_list->ps, bind_list->port); | |
806 | kfree(bind_list); | |
807 | } | |
808 | mutex_unlock(&lock); | |
809 | } | |
810 | ||
c8f6a362 SH |
811 | static void cma_leave_mc_groups(struct rdma_id_private *id_priv) |
812 | { | |
813 | struct cma_multicast *mc; | |
814 | ||
815 | while (!list_empty(&id_priv->mc_list)) { | |
816 | mc = container_of(id_priv->mc_list.next, | |
817 | struct cma_multicast, list); | |
818 | list_del(&mc->list); | |
819 | ib_sa_free_multicast(mc->multicast.ib); | |
820 | kfree(mc); | |
821 | } | |
822 | } | |
823 | ||
e51060f0 SH |
824 | void rdma_destroy_id(struct rdma_cm_id *id) |
825 | { | |
826 | struct rdma_id_private *id_priv; | |
827 | enum cma_state state; | |
828 | ||
829 | id_priv = container_of(id, struct rdma_id_private, id); | |
830 | state = cma_exch(id_priv, CMA_DESTROYING); | |
831 | cma_cancel_operation(id_priv, state); | |
832 | ||
61a73c70 | 833 | mutex_lock(&lock); |
e51060f0 | 834 | if (id_priv->cma_dev) { |
61a73c70 | 835 | mutex_unlock(&lock); |
07ebafba TT |
836 | switch (rdma_node_get_transport(id->device->node_type)) { |
837 | case RDMA_TRANSPORT_IB: | |
3cd96564 | 838 | if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib)) |
e51060f0 SH |
839 | ib_destroy_cm_id(id_priv->cm_id.ib); |
840 | break; | |
07ebafba TT |
841 | case RDMA_TRANSPORT_IWARP: |
842 | if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw)) | |
843 | iw_destroy_cm_id(id_priv->cm_id.iw); | |
844 | break; | |
e51060f0 SH |
845 | default: |
846 | break; | |
847 | } | |
c8f6a362 | 848 | cma_leave_mc_groups(id_priv); |
3cd96564 | 849 | mutex_lock(&lock); |
e51060f0 | 850 | cma_detach_from_dev(id_priv); |
e51060f0 | 851 | } |
61a73c70 | 852 | mutex_unlock(&lock); |
e51060f0 SH |
853 | |
854 | cma_release_port(id_priv); | |
855 | cma_deref_id(id_priv); | |
856 | wait_for_completion(&id_priv->comp); | |
857 | ||
d02d1f53 SH |
858 | if (id_priv->internal_id) |
859 | cma_deref_id(id_priv->id.context); | |
860 | ||
e51060f0 SH |
861 | kfree(id_priv->id.route.path_rec); |
862 | kfree(id_priv); | |
863 | } | |
864 | EXPORT_SYMBOL(rdma_destroy_id); | |
865 | ||
866 | static int cma_rep_recv(struct rdma_id_private *id_priv) | |
867 | { | |
868 | int ret; | |
869 | ||
5851bb89 | 870 | ret = cma_modify_qp_rtr(id_priv, NULL); |
e51060f0 SH |
871 | if (ret) |
872 | goto reject; | |
873 | ||
5851bb89 | 874 | ret = cma_modify_qp_rts(id_priv, NULL); |
e51060f0 SH |
875 | if (ret) |
876 | goto reject; | |
877 | ||
878 | ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0); | |
879 | if (ret) | |
880 | goto reject; | |
881 | ||
882 | return 0; | |
883 | reject: | |
c5483388 | 884 | cma_modify_qp_err(id_priv); |
e51060f0 SH |
885 | ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED, |
886 | NULL, 0, NULL, 0); | |
887 | return ret; | |
888 | } | |
889 | ||
890 | static int cma_verify_rep(struct rdma_id_private *id_priv, void *data) | |
891 | { | |
892 | if (id_priv->id.ps == RDMA_PS_SDP && | |
893 | sdp_get_majv(((struct sdp_hah *) data)->sdp_version) != | |
894 | SDP_MAJ_VERSION) | |
895 | return -EINVAL; | |
896 | ||
897 | return 0; | |
898 | } | |
899 | ||
a1b1b61f SH |
900 | static void cma_set_rep_event_data(struct rdma_cm_event *event, |
901 | struct ib_cm_rep_event_param *rep_data, | |
902 | void *private_data) | |
903 | { | |
904 | event->param.conn.private_data = private_data; | |
905 | event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE; | |
906 | event->param.conn.responder_resources = rep_data->responder_resources; | |
907 | event->param.conn.initiator_depth = rep_data->initiator_depth; | |
908 | event->param.conn.flow_control = rep_data->flow_control; | |
909 | event->param.conn.rnr_retry_count = rep_data->rnr_retry_count; | |
910 | event->param.conn.srq = rep_data->srq; | |
911 | event->param.conn.qp_num = rep_data->remote_qpn; | |
912 | } | |
913 | ||
e51060f0 SH |
914 | static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) |
915 | { | |
916 | struct rdma_id_private *id_priv = cm_id->context; | |
a1b1b61f SH |
917 | struct rdma_cm_event event; |
918 | int ret = 0; | |
e51060f0 | 919 | |
38ca83a5 AV |
920 | if ((ib_event->event != IB_CM_TIMEWAIT_EXIT && |
921 | cma_disable_callback(id_priv, CMA_CONNECT)) || | |
922 | (ib_event->event == IB_CM_TIMEWAIT_EXIT && | |
923 | cma_disable_callback(id_priv, CMA_DISCONNECT))) | |
8aa08602 | 924 | return 0; |
e51060f0 | 925 | |
a1b1b61f | 926 | memset(&event, 0, sizeof event); |
e51060f0 SH |
927 | switch (ib_event->event) { |
928 | case IB_CM_REQ_ERROR: | |
929 | case IB_CM_REP_ERROR: | |
a1b1b61f SH |
930 | event.event = RDMA_CM_EVENT_UNREACHABLE; |
931 | event.status = -ETIMEDOUT; | |
e51060f0 SH |
932 | break; |
933 | case IB_CM_REP_RECEIVED: | |
a1b1b61f SH |
934 | event.status = cma_verify_rep(id_priv, ib_event->private_data); |
935 | if (event.status) | |
936 | event.event = RDMA_CM_EVENT_CONNECT_ERROR; | |
e51060f0 | 937 | else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) { |
a1b1b61f SH |
938 | event.status = cma_rep_recv(id_priv); |
939 | event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR : | |
940 | RDMA_CM_EVENT_ESTABLISHED; | |
e51060f0 | 941 | } else |
a1b1b61f SH |
942 | event.event = RDMA_CM_EVENT_CONNECT_RESPONSE; |
943 | cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd, | |
944 | ib_event->private_data); | |
e51060f0 SH |
945 | break; |
946 | case IB_CM_RTU_RECEIVED: | |
0fe313b0 SH |
947 | case IB_CM_USER_ESTABLISHED: |
948 | event.event = RDMA_CM_EVENT_ESTABLISHED; | |
e51060f0 SH |
949 | break; |
950 | case IB_CM_DREQ_ERROR: | |
a1b1b61f | 951 | event.status = -ETIMEDOUT; /* fall through */ |
e51060f0 SH |
952 | case IB_CM_DREQ_RECEIVED: |
953 | case IB_CM_DREP_RECEIVED: | |
954 | if (!cma_comp_exch(id_priv, CMA_CONNECT, CMA_DISCONNECT)) | |
955 | goto out; | |
a1b1b61f | 956 | event.event = RDMA_CM_EVENT_DISCONNECTED; |
e51060f0 SH |
957 | break; |
958 | case IB_CM_TIMEWAIT_EXIT: | |
38ca83a5 AV |
959 | event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT; |
960 | break; | |
e51060f0 SH |
961 | case IB_CM_MRA_RECEIVED: |
962 | /* ignore event */ | |
963 | goto out; | |
964 | case IB_CM_REJ_RECEIVED: | |
c5483388 | 965 | cma_modify_qp_err(id_priv); |
a1b1b61f SH |
966 | event.status = ib_event->param.rej_rcvd.reason; |
967 | event.event = RDMA_CM_EVENT_REJECTED; | |
968 | event.param.conn.private_data = ib_event->private_data; | |
969 | event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; | |
e51060f0 SH |
970 | break; |
971 | default: | |
468f2239 | 972 | printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n", |
e51060f0 SH |
973 | ib_event->event); |
974 | goto out; | |
975 | } | |
976 | ||
a1b1b61f | 977 | ret = id_priv->id.event_handler(&id_priv->id, &event); |
e51060f0 SH |
978 | if (ret) { |
979 | /* Destroy the CM ID by returning a non-zero value. */ | |
980 | id_priv->cm_id.ib = NULL; | |
981 | cma_exch(id_priv, CMA_DESTROYING); | |
de910bd9 | 982 | mutex_unlock(&id_priv->handler_mutex); |
e51060f0 SH |
983 | rdma_destroy_id(&id_priv->id); |
984 | return ret; | |
985 | } | |
986 | out: | |
de910bd9 | 987 | mutex_unlock(&id_priv->handler_mutex); |
e51060f0 SH |
988 | return ret; |
989 | } | |
990 | ||
628e5f6d SH |
991 | static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id, |
992 | struct ib_cm_event *ib_event) | |
e51060f0 SH |
993 | { |
994 | struct rdma_id_private *id_priv; | |
995 | struct rdma_cm_id *id; | |
996 | struct rdma_route *rt; | |
997 | union cma_ip_addr *src, *dst; | |
1b90c137 | 998 | __be16 port; |
e51060f0 | 999 | u8 ip_ver; |
64c5e613 | 1000 | int ret; |
e51060f0 | 1001 | |
3f168d2b KK |
1002 | if (cma_get_net_info(ib_event->private_data, listen_id->ps, |
1003 | &ip_ver, &port, &src, &dst)) | |
1004 | goto err; | |
1005 | ||
e51060f0 SH |
1006 | id = rdma_create_id(listen_id->event_handler, listen_id->context, |
1007 | listen_id->ps); | |
1008 | if (IS_ERR(id)) | |
3f168d2b KK |
1009 | goto err; |
1010 | ||
1011 | cma_save_net_info(&id->route.addr, &listen_id->route.addr, | |
1012 | ip_ver, port, src, dst); | |
e51060f0 SH |
1013 | |
1014 | rt = &id->route; | |
1015 | rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1; | |
3f168d2b KK |
1016 | rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths, |
1017 | GFP_KERNEL); | |
e51060f0 | 1018 | if (!rt->path_rec) |
3f168d2b | 1019 | goto destroy_id; |
e51060f0 | 1020 | |
e51060f0 SH |
1021 | rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path; |
1022 | if (rt->num_paths == 2) | |
1023 | rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path; | |
1024 | ||
6f8372b6 SH |
1025 | if (cma_any_addr((struct sockaddr *) &rt->addr.src_addr)) { |
1026 | rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND; | |
1027 | rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid); | |
1028 | ib_addr_set_pkey(&rt->addr.dev_addr, rt->path_rec[0].pkey); | |
1029 | } else { | |
1030 | ret = rdma_translate_ip((struct sockaddr *) &rt->addr.src_addr, | |
1031 | &rt->addr.dev_addr); | |
1032 | if (ret) | |
1033 | goto destroy_id; | |
1034 | } | |
1035 | rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid); | |
e51060f0 SH |
1036 | |
1037 | id_priv = container_of(id, struct rdma_id_private, id); | |
1038 | id_priv->state = CMA_CONNECT; | |
1039 | return id_priv; | |
3f168d2b KK |
1040 | |
1041 | destroy_id: | |
e51060f0 | 1042 | rdma_destroy_id(id); |
3f168d2b | 1043 | err: |
e51060f0 SH |
1044 | return NULL; |
1045 | } | |
1046 | ||
628e5f6d SH |
1047 | static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id, |
1048 | struct ib_cm_event *ib_event) | |
1049 | { | |
1050 | struct rdma_id_private *id_priv; | |
1051 | struct rdma_cm_id *id; | |
1052 | union cma_ip_addr *src, *dst; | |
1b90c137 | 1053 | __be16 port; |
628e5f6d SH |
1054 | u8 ip_ver; |
1055 | int ret; | |
1056 | ||
1057 | id = rdma_create_id(listen_id->event_handler, listen_id->context, | |
1058 | listen_id->ps); | |
1059 | if (IS_ERR(id)) | |
1060 | return NULL; | |
1061 | ||
1062 | ||
1063 | if (cma_get_net_info(ib_event->private_data, listen_id->ps, | |
1064 | &ip_ver, &port, &src, &dst)) | |
1065 | goto err; | |
1066 | ||
1067 | cma_save_net_info(&id->route.addr, &listen_id->route.addr, | |
1068 | ip_ver, port, src, dst); | |
1069 | ||
6f8372b6 SH |
1070 | if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) { |
1071 | ret = rdma_translate_ip((struct sockaddr *) &id->route.addr.src_addr, | |
1072 | &id->route.addr.dev_addr); | |
1073 | if (ret) | |
1074 | goto err; | |
1075 | } | |
628e5f6d SH |
1076 | |
1077 | id_priv = container_of(id, struct rdma_id_private, id); | |
1078 | id_priv->state = CMA_CONNECT; | |
1079 | return id_priv; | |
1080 | err: | |
1081 | rdma_destroy_id(id); | |
1082 | return NULL; | |
1083 | } | |
1084 | ||
a1b1b61f SH |
1085 | static void cma_set_req_event_data(struct rdma_cm_event *event, |
1086 | struct ib_cm_req_event_param *req_data, | |
1087 | void *private_data, int offset) | |
1088 | { | |
1089 | event->param.conn.private_data = private_data + offset; | |
1090 | event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset; | |
1091 | event->param.conn.responder_resources = req_data->responder_resources; | |
1092 | event->param.conn.initiator_depth = req_data->initiator_depth; | |
1093 | event->param.conn.flow_control = req_data->flow_control; | |
1094 | event->param.conn.retry_count = req_data->retry_count; | |
1095 | event->param.conn.rnr_retry_count = req_data->rnr_retry_count; | |
1096 | event->param.conn.srq = req_data->srq; | |
1097 | event->param.conn.qp_num = req_data->remote_qpn; | |
1098 | } | |
1099 | ||
e51060f0 SH |
1100 | static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) |
1101 | { | |
1102 | struct rdma_id_private *listen_id, *conn_id; | |
a1b1b61f | 1103 | struct rdma_cm_event event; |
e51060f0 SH |
1104 | int offset, ret; |
1105 | ||
1106 | listen_id = cm_id->context; | |
de910bd9 | 1107 | if (cma_disable_callback(listen_id, CMA_LISTEN)) |
8aa08602 | 1108 | return -ECONNABORTED; |
e51060f0 | 1109 | |
628e5f6d SH |
1110 | memset(&event, 0, sizeof event); |
1111 | offset = cma_user_data_offset(listen_id->id.ps); | |
1112 | event.event = RDMA_CM_EVENT_CONNECT_REQUEST; | |
c8f6a362 | 1113 | if (cma_is_ud_ps(listen_id->id.ps)) { |
628e5f6d SH |
1114 | conn_id = cma_new_udp_id(&listen_id->id, ib_event); |
1115 | event.param.ud.private_data = ib_event->private_data + offset; | |
1116 | event.param.ud.private_data_len = | |
1117 | IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset; | |
1118 | } else { | |
1119 | conn_id = cma_new_conn_id(&listen_id->id, ib_event); | |
1120 | cma_set_req_event_data(&event, &ib_event->param.req_rcvd, | |
1121 | ib_event->private_data, offset); | |
1122 | } | |
e51060f0 SH |
1123 | if (!conn_id) { |
1124 | ret = -ENOMEM; | |
1125 | goto out; | |
1126 | } | |
1127 | ||
de910bd9 | 1128 | mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING); |
61a73c70 | 1129 | mutex_lock(&lock); |
07ebafba | 1130 | ret = cma_acquire_dev(conn_id); |
61a73c70 | 1131 | mutex_unlock(&lock); |
a1a733f6 KK |
1132 | if (ret) |
1133 | goto release_conn_id; | |
e51060f0 SH |
1134 | |
1135 | conn_id->cm_id.ib = cm_id; | |
1136 | cm_id->context = conn_id; | |
1137 | cm_id->cm_handler = cma_ib_handler; | |
1138 | ||
a1b1b61f | 1139 | ret = conn_id->id.event_handler(&conn_id->id, &event); |
45d9478d | 1140 | if (!ret) { |
ead595ae SH |
1141 | /* |
1142 | * Acquire mutex to prevent user executing rdma_destroy_id() | |
1143 | * while we're accessing the cm_id. | |
1144 | */ | |
1145 | mutex_lock(&lock); | |
1146 | if (cma_comp(conn_id, CMA_CONNECT) && | |
1147 | !cma_is_ud_ps(conn_id->id.ps)) | |
1148 | ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0); | |
1149 | mutex_unlock(&lock); | |
de910bd9 | 1150 | mutex_unlock(&conn_id->handler_mutex); |
a1a733f6 | 1151 | goto out; |
45d9478d | 1152 | } |
a1a733f6 KK |
1153 | |
1154 | /* Destroy the CM ID by returning a non-zero value. */ | |
1155 | conn_id->cm_id.ib = NULL; | |
1156 | ||
1157 | release_conn_id: | |
1158 | cma_exch(conn_id, CMA_DESTROYING); | |
de910bd9 | 1159 | mutex_unlock(&conn_id->handler_mutex); |
a1a733f6 KK |
1160 | rdma_destroy_id(&conn_id->id); |
1161 | ||
e51060f0 | 1162 | out: |
de910bd9 | 1163 | mutex_unlock(&listen_id->handler_mutex); |
e51060f0 SH |
1164 | return ret; |
1165 | } | |
1166 | ||
1167 | static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr) | |
1168 | { | |
628e5f6d | 1169 | return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr))); |
e51060f0 SH |
1170 | } |
1171 | ||
1172 | static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr, | |
1173 | struct ib_cm_compare_data *compare) | |
1174 | { | |
1175 | struct cma_hdr *cma_data, *cma_mask; | |
1176 | struct sdp_hh *sdp_data, *sdp_mask; | |
1b90c137 | 1177 | __be32 ip4_addr; |
e51060f0 SH |
1178 | struct in6_addr ip6_addr; |
1179 | ||
1180 | memset(compare, 0, sizeof *compare); | |
1181 | cma_data = (void *) compare->data; | |
1182 | cma_mask = (void *) compare->mask; | |
1183 | sdp_data = (void *) compare->data; | |
1184 | sdp_mask = (void *) compare->mask; | |
1185 | ||
1186 | switch (addr->sa_family) { | |
1187 | case AF_INET: | |
1188 | ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr; | |
1189 | if (ps == RDMA_PS_SDP) { | |
1190 | sdp_set_ip_ver(sdp_data, 4); | |
1191 | sdp_set_ip_ver(sdp_mask, 0xF); | |
1192 | sdp_data->dst_addr.ip4.addr = ip4_addr; | |
1b90c137 | 1193 | sdp_mask->dst_addr.ip4.addr = htonl(~0); |
e51060f0 SH |
1194 | } else { |
1195 | cma_set_ip_ver(cma_data, 4); | |
1196 | cma_set_ip_ver(cma_mask, 0xF); | |
1197 | cma_data->dst_addr.ip4.addr = ip4_addr; | |
1b90c137 | 1198 | cma_mask->dst_addr.ip4.addr = htonl(~0); |
e51060f0 SH |
1199 | } |
1200 | break; | |
1201 | case AF_INET6: | |
1202 | ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr; | |
1203 | if (ps == RDMA_PS_SDP) { | |
1204 | sdp_set_ip_ver(sdp_data, 6); | |
1205 | sdp_set_ip_ver(sdp_mask, 0xF); | |
1206 | sdp_data->dst_addr.ip6 = ip6_addr; | |
1207 | memset(&sdp_mask->dst_addr.ip6, 0xFF, | |
1208 | sizeof sdp_mask->dst_addr.ip6); | |
1209 | } else { | |
1210 | cma_set_ip_ver(cma_data, 6); | |
1211 | cma_set_ip_ver(cma_mask, 0xF); | |
1212 | cma_data->dst_addr.ip6 = ip6_addr; | |
1213 | memset(&cma_mask->dst_addr.ip6, 0xFF, | |
1214 | sizeof cma_mask->dst_addr.ip6); | |
1215 | } | |
1216 | break; | |
1217 | default: | |
1218 | break; | |
1219 | } | |
1220 | } | |
1221 | ||
07ebafba TT |
1222 | static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event) |
1223 | { | |
1224 | struct rdma_id_private *id_priv = iw_id->context; | |
a1b1b61f | 1225 | struct rdma_cm_event event; |
07ebafba TT |
1226 | struct sockaddr_in *sin; |
1227 | int ret = 0; | |
1228 | ||
de910bd9 | 1229 | if (cma_disable_callback(id_priv, CMA_CONNECT)) |
be65f086 | 1230 | return 0; |
07ebafba | 1231 | |
be65f086 | 1232 | memset(&event, 0, sizeof event); |
07ebafba TT |
1233 | switch (iw_event->event) { |
1234 | case IW_CM_EVENT_CLOSE: | |
a1b1b61f | 1235 | event.event = RDMA_CM_EVENT_DISCONNECTED; |
07ebafba TT |
1236 | break; |
1237 | case IW_CM_EVENT_CONNECT_REPLY: | |
1238 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; | |
1239 | *sin = iw_event->local_addr; | |
1240 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr; | |
1241 | *sin = iw_event->remote_addr; | |
881a045f SW |
1242 | switch (iw_event->status) { |
1243 | case 0: | |
a1b1b61f | 1244 | event.event = RDMA_CM_EVENT_ESTABLISHED; |
881a045f SW |
1245 | break; |
1246 | case -ECONNRESET: | |
1247 | case -ECONNREFUSED: | |
1248 | event.event = RDMA_CM_EVENT_REJECTED; | |
1249 | break; | |
1250 | case -ETIMEDOUT: | |
1251 | event.event = RDMA_CM_EVENT_UNREACHABLE; | |
1252 | break; | |
1253 | default: | |
1254 | event.event = RDMA_CM_EVENT_CONNECT_ERROR; | |
1255 | break; | |
1256 | } | |
07ebafba TT |
1257 | break; |
1258 | case IW_CM_EVENT_ESTABLISHED: | |
a1b1b61f | 1259 | event.event = RDMA_CM_EVENT_ESTABLISHED; |
07ebafba TT |
1260 | break; |
1261 | default: | |
1262 | BUG_ON(1); | |
1263 | } | |
1264 | ||
a1b1b61f SH |
1265 | event.status = iw_event->status; |
1266 | event.param.conn.private_data = iw_event->private_data; | |
1267 | event.param.conn.private_data_len = iw_event->private_data_len; | |
1268 | ret = id_priv->id.event_handler(&id_priv->id, &event); | |
07ebafba TT |
1269 | if (ret) { |
1270 | /* Destroy the CM ID by returning a non-zero value. */ | |
1271 | id_priv->cm_id.iw = NULL; | |
1272 | cma_exch(id_priv, CMA_DESTROYING); | |
de910bd9 | 1273 | mutex_unlock(&id_priv->handler_mutex); |
07ebafba TT |
1274 | rdma_destroy_id(&id_priv->id); |
1275 | return ret; | |
1276 | } | |
1277 | ||
de910bd9 | 1278 | mutex_unlock(&id_priv->handler_mutex); |
07ebafba TT |
1279 | return ret; |
1280 | } | |
1281 | ||
1282 | static int iw_conn_req_handler(struct iw_cm_id *cm_id, | |
1283 | struct iw_cm_event *iw_event) | |
1284 | { | |
1285 | struct rdma_cm_id *new_cm_id; | |
1286 | struct rdma_id_private *listen_id, *conn_id; | |
1287 | struct sockaddr_in *sin; | |
1288 | struct net_device *dev = NULL; | |
a1b1b61f | 1289 | struct rdma_cm_event event; |
07ebafba | 1290 | int ret; |
8d8293cf | 1291 | struct ib_device_attr attr; |
07ebafba TT |
1292 | |
1293 | listen_id = cm_id->context; | |
de910bd9 | 1294 | if (cma_disable_callback(listen_id, CMA_LISTEN)) |
8aa08602 | 1295 | return -ECONNABORTED; |
07ebafba TT |
1296 | |
1297 | /* Create a new RDMA id for the new IW CM ID */ | |
1298 | new_cm_id = rdma_create_id(listen_id->id.event_handler, | |
1299 | listen_id->id.context, | |
1300 | RDMA_PS_TCP); | |
10f32065 | 1301 | if (IS_ERR(new_cm_id)) { |
07ebafba TT |
1302 | ret = -ENOMEM; |
1303 | goto out; | |
1304 | } | |
1305 | conn_id = container_of(new_cm_id, struct rdma_id_private, id); | |
de910bd9 | 1306 | mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING); |
07ebafba TT |
1307 | conn_id->state = CMA_CONNECT; |
1308 | ||
1ab35276 | 1309 | dev = ip_dev_find(&init_net, iw_event->local_addr.sin_addr.s_addr); |
07ebafba TT |
1310 | if (!dev) { |
1311 | ret = -EADDRNOTAVAIL; | |
de910bd9 | 1312 | mutex_unlock(&conn_id->handler_mutex); |
07ebafba TT |
1313 | rdma_destroy_id(new_cm_id); |
1314 | goto out; | |
1315 | } | |
1316 | ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL); | |
1317 | if (ret) { | |
de910bd9 | 1318 | mutex_unlock(&conn_id->handler_mutex); |
07ebafba TT |
1319 | rdma_destroy_id(new_cm_id); |
1320 | goto out; | |
1321 | } | |
1322 | ||
61a73c70 | 1323 | mutex_lock(&lock); |
07ebafba | 1324 | ret = cma_acquire_dev(conn_id); |
61a73c70 | 1325 | mutex_unlock(&lock); |
07ebafba | 1326 | if (ret) { |
de910bd9 | 1327 | mutex_unlock(&conn_id->handler_mutex); |
07ebafba TT |
1328 | rdma_destroy_id(new_cm_id); |
1329 | goto out; | |
1330 | } | |
1331 | ||
1332 | conn_id->cm_id.iw = cm_id; | |
1333 | cm_id->context = conn_id; | |
1334 | cm_id->cm_handler = cma_iw_handler; | |
1335 | ||
1336 | sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr; | |
1337 | *sin = iw_event->local_addr; | |
1338 | sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr; | |
1339 | *sin = iw_event->remote_addr; | |
1340 | ||
8d8293cf SW |
1341 | ret = ib_query_device(conn_id->id.device, &attr); |
1342 | if (ret) { | |
de910bd9 | 1343 | mutex_unlock(&conn_id->handler_mutex); |
8d8293cf SW |
1344 | rdma_destroy_id(new_cm_id); |
1345 | goto out; | |
1346 | } | |
1347 | ||
a1b1b61f SH |
1348 | memset(&event, 0, sizeof event); |
1349 | event.event = RDMA_CM_EVENT_CONNECT_REQUEST; | |
1350 | event.param.conn.private_data = iw_event->private_data; | |
1351 | event.param.conn.private_data_len = iw_event->private_data_len; | |
8d8293cf SW |
1352 | event.param.conn.initiator_depth = attr.max_qp_init_rd_atom; |
1353 | event.param.conn.responder_resources = attr.max_qp_rd_atom; | |
a1b1b61f | 1354 | ret = conn_id->id.event_handler(&conn_id->id, &event); |
07ebafba TT |
1355 | if (ret) { |
1356 | /* User wants to destroy the CM ID */ | |
1357 | conn_id->cm_id.iw = NULL; | |
1358 | cma_exch(conn_id, CMA_DESTROYING); | |
de910bd9 | 1359 | mutex_unlock(&conn_id->handler_mutex); |
07ebafba | 1360 | rdma_destroy_id(&conn_id->id); |
de910bd9 | 1361 | goto out; |
07ebafba TT |
1362 | } |
1363 | ||
de910bd9 OG |
1364 | mutex_unlock(&conn_id->handler_mutex); |
1365 | ||
07ebafba TT |
1366 | out: |
1367 | if (dev) | |
1368 | dev_put(dev); | |
de910bd9 | 1369 | mutex_unlock(&listen_id->handler_mutex); |
07ebafba TT |
1370 | return ret; |
1371 | } | |
1372 | ||
e51060f0 SH |
1373 | static int cma_ib_listen(struct rdma_id_private *id_priv) |
1374 | { | |
1375 | struct ib_cm_compare_data compare_data; | |
1376 | struct sockaddr *addr; | |
1377 | __be64 svc_id; | |
1378 | int ret; | |
1379 | ||
1380 | id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_req_handler, | |
1381 | id_priv); | |
1382 | if (IS_ERR(id_priv->cm_id.ib)) | |
1383 | return PTR_ERR(id_priv->cm_id.ib); | |
1384 | ||
3f446754 | 1385 | addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr; |
e51060f0 SH |
1386 | svc_id = cma_get_service_id(id_priv->id.ps, addr); |
1387 | if (cma_any_addr(addr)) | |
1388 | ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL); | |
1389 | else { | |
1390 | cma_set_compare_data(id_priv->id.ps, addr, &compare_data); | |
1391 | ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data); | |
1392 | } | |
1393 | ||
1394 | if (ret) { | |
1395 | ib_destroy_cm_id(id_priv->cm_id.ib); | |
1396 | id_priv->cm_id.ib = NULL; | |
1397 | } | |
1398 | ||
1399 | return ret; | |
1400 | } | |
1401 | ||
07ebafba TT |
1402 | static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog) |
1403 | { | |
1404 | int ret; | |
1405 | struct sockaddr_in *sin; | |
1406 | ||
1407 | id_priv->cm_id.iw = iw_create_cm_id(id_priv->id.device, | |
1408 | iw_conn_req_handler, | |
1409 | id_priv); | |
1410 | if (IS_ERR(id_priv->cm_id.iw)) | |
1411 | return PTR_ERR(id_priv->cm_id.iw); | |
1412 | ||
1413 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; | |
1414 | id_priv->cm_id.iw->local_addr = *sin; | |
1415 | ||
1416 | ret = iw_cm_listen(id_priv->cm_id.iw, backlog); | |
1417 | ||
1418 | if (ret) { | |
1419 | iw_destroy_cm_id(id_priv->cm_id.iw); | |
1420 | id_priv->cm_id.iw = NULL; | |
1421 | } | |
1422 | ||
1423 | return ret; | |
1424 | } | |
1425 | ||
e51060f0 SH |
1426 | static int cma_listen_handler(struct rdma_cm_id *id, |
1427 | struct rdma_cm_event *event) | |
1428 | { | |
1429 | struct rdma_id_private *id_priv = id->context; | |
1430 | ||
1431 | id->context = id_priv->id.context; | |
1432 | id->event_handler = id_priv->id.event_handler; | |
1433 | return id_priv->id.event_handler(id, event); | |
1434 | } | |
1435 | ||
1436 | static void cma_listen_on_dev(struct rdma_id_private *id_priv, | |
1437 | struct cma_device *cma_dev) | |
1438 | { | |
1439 | struct rdma_id_private *dev_id_priv; | |
1440 | struct rdma_cm_id *id; | |
1441 | int ret; | |
1442 | ||
1443 | id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps); | |
1444 | if (IS_ERR(id)) | |
1445 | return; | |
1446 | ||
1447 | dev_id_priv = container_of(id, struct rdma_id_private, id); | |
1448 | ||
1449 | dev_id_priv->state = CMA_ADDR_BOUND; | |
1450 | memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr, | |
3f446754 | 1451 | ip_addr_size((struct sockaddr *) &id_priv->id.route.addr.src_addr)); |
e51060f0 SH |
1452 | |
1453 | cma_attach_to_dev(dev_id_priv, cma_dev); | |
1454 | list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list); | |
d02d1f53 SH |
1455 | atomic_inc(&id_priv->refcount); |
1456 | dev_id_priv->internal_id = 1; | |
e51060f0 SH |
1457 | |
1458 | ret = rdma_listen(id, id_priv->backlog); | |
1459 | if (ret) | |
d02d1f53 | 1460 | printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, " |
468f2239 | 1461 | "listening on device %s\n", ret, cma_dev->device->name); |
e51060f0 SH |
1462 | } |
1463 | ||
1464 | static void cma_listen_on_all(struct rdma_id_private *id_priv) | |
1465 | { | |
1466 | struct cma_device *cma_dev; | |
1467 | ||
1468 | mutex_lock(&lock); | |
1469 | list_add_tail(&id_priv->list, &listen_any_list); | |
1470 | list_for_each_entry(cma_dev, &dev_list, list) | |
1471 | cma_listen_on_dev(id_priv, cma_dev); | |
1472 | mutex_unlock(&lock); | |
1473 | } | |
1474 | ||
e51060f0 SH |
1475 | int rdma_listen(struct rdma_cm_id *id, int backlog) |
1476 | { | |
1477 | struct rdma_id_private *id_priv; | |
1478 | int ret; | |
1479 | ||
1480 | id_priv = container_of(id, struct rdma_id_private, id); | |
1481 | if (id_priv->state == CMA_IDLE) { | |
d14714df SH |
1482 | ((struct sockaddr *) &id->route.addr.src_addr)->sa_family = AF_INET; |
1483 | ret = rdma_bind_addr(id, (struct sockaddr *) &id->route.addr.src_addr); | |
e51060f0 SH |
1484 | if (ret) |
1485 | return ret; | |
1486 | } | |
1487 | ||
1488 | if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_LISTEN)) | |
1489 | return -EINVAL; | |
1490 | ||
1491 | id_priv->backlog = backlog; | |
1492 | if (id->device) { | |
07ebafba TT |
1493 | switch (rdma_node_get_transport(id->device->node_type)) { |
1494 | case RDMA_TRANSPORT_IB: | |
e51060f0 SH |
1495 | ret = cma_ib_listen(id_priv); |
1496 | if (ret) | |
1497 | goto err; | |
1498 | break; | |
07ebafba TT |
1499 | case RDMA_TRANSPORT_IWARP: |
1500 | ret = cma_iw_listen(id_priv, backlog); | |
1501 | if (ret) | |
1502 | goto err; | |
1503 | break; | |
e51060f0 SH |
1504 | default: |
1505 | ret = -ENOSYS; | |
1506 | goto err; | |
1507 | } | |
1508 | } else | |
1509 | cma_listen_on_all(id_priv); | |
1510 | ||
1511 | return 0; | |
1512 | err: | |
1513 | id_priv->backlog = 0; | |
1514 | cma_comp_exch(id_priv, CMA_LISTEN, CMA_ADDR_BOUND); | |
1515 | return ret; | |
1516 | } | |
1517 | EXPORT_SYMBOL(rdma_listen); | |
1518 | ||
a81c994d SH |
1519 | void rdma_set_service_type(struct rdma_cm_id *id, int tos) |
1520 | { | |
1521 | struct rdma_id_private *id_priv; | |
1522 | ||
1523 | id_priv = container_of(id, struct rdma_id_private, id); | |
1524 | id_priv->tos = (u8) tos; | |
1525 | } | |
1526 | EXPORT_SYMBOL(rdma_set_service_type); | |
1527 | ||
e51060f0 SH |
1528 | static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec, |
1529 | void *context) | |
1530 | { | |
1531 | struct cma_work *work = context; | |
1532 | struct rdma_route *route; | |
1533 | ||
1534 | route = &work->id->id.route; | |
1535 | ||
1536 | if (!status) { | |
1537 | route->num_paths = 1; | |
1538 | *route->path_rec = *path_rec; | |
1539 | } else { | |
1540 | work->old_state = CMA_ROUTE_QUERY; | |
1541 | work->new_state = CMA_ADDR_RESOLVED; | |
1542 | work->event.event = RDMA_CM_EVENT_ROUTE_ERROR; | |
8f0472d3 | 1543 | work->event.status = status; |
e51060f0 SH |
1544 | } |
1545 | ||
1546 | queue_work(cma_wq, &work->work); | |
1547 | } | |
1548 | ||
1549 | static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms, | |
1550 | struct cma_work *work) | |
1551 | { | |
a81c994d | 1552 | struct rdma_addr *addr = &id_priv->id.route.addr; |
e51060f0 | 1553 | struct ib_sa_path_rec path_rec; |
a81c994d SH |
1554 | ib_sa_comp_mask comp_mask; |
1555 | struct sockaddr_in6 *sin6; | |
e51060f0 SH |
1556 | |
1557 | memset(&path_rec, 0, sizeof path_rec); | |
6f8372b6 SH |
1558 | rdma_addr_get_sgid(&addr->dev_addr, &path_rec.sgid); |
1559 | rdma_addr_get_dgid(&addr->dev_addr, &path_rec.dgid); | |
a81c994d | 1560 | path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(&addr->dev_addr)); |
e51060f0 | 1561 | path_rec.numb_path = 1; |
962063e6 | 1562 | path_rec.reversible = 1; |
3f446754 RD |
1563 | path_rec.service_id = cma_get_service_id(id_priv->id.ps, |
1564 | (struct sockaddr *) &addr->dst_addr); | |
a81c994d SH |
1565 | |
1566 | comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID | | |
1567 | IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH | | |
1568 | IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID; | |
1569 | ||
3f446754 | 1570 | if (addr->src_addr.ss_family == AF_INET) { |
a81c994d SH |
1571 | path_rec.qos_class = cpu_to_be16((u16) id_priv->tos); |
1572 | comp_mask |= IB_SA_PATH_REC_QOS_CLASS; | |
1573 | } else { | |
1574 | sin6 = (struct sockaddr_in6 *) &addr->src_addr; | |
1575 | path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20); | |
1576 | comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS; | |
1577 | } | |
e51060f0 | 1578 | |
c1a0b23b | 1579 | id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device, |
a81c994d SH |
1580 | id_priv->id.port_num, &path_rec, |
1581 | comp_mask, timeout_ms, | |
1582 | GFP_KERNEL, cma_query_handler, | |
1583 | work, &id_priv->query); | |
e51060f0 SH |
1584 | |
1585 | return (id_priv->query_id < 0) ? id_priv->query_id : 0; | |
1586 | } | |
1587 | ||
c4028958 | 1588 | static void cma_work_handler(struct work_struct *_work) |
e51060f0 | 1589 | { |
c4028958 | 1590 | struct cma_work *work = container_of(_work, struct cma_work, work); |
e51060f0 SH |
1591 | struct rdma_id_private *id_priv = work->id; |
1592 | int destroy = 0; | |
1593 | ||
de910bd9 | 1594 | mutex_lock(&id_priv->handler_mutex); |
e51060f0 SH |
1595 | if (!cma_comp_exch(id_priv, work->old_state, work->new_state)) |
1596 | goto out; | |
1597 | ||
1598 | if (id_priv->id.event_handler(&id_priv->id, &work->event)) { | |
1599 | cma_exch(id_priv, CMA_DESTROYING); | |
1600 | destroy = 1; | |
1601 | } | |
1602 | out: | |
de910bd9 | 1603 | mutex_unlock(&id_priv->handler_mutex); |
e51060f0 SH |
1604 | cma_deref_id(id_priv); |
1605 | if (destroy) | |
1606 | rdma_destroy_id(&id_priv->id); | |
1607 | kfree(work); | |
1608 | } | |
1609 | ||
dd5bdff8 OG |
1610 | static void cma_ndev_work_handler(struct work_struct *_work) |
1611 | { | |
1612 | struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work); | |
1613 | struct rdma_id_private *id_priv = work->id; | |
1614 | int destroy = 0; | |
1615 | ||
1616 | mutex_lock(&id_priv->handler_mutex); | |
1617 | if (id_priv->state == CMA_DESTROYING || | |
1618 | id_priv->state == CMA_DEVICE_REMOVAL) | |
1619 | goto out; | |
1620 | ||
1621 | if (id_priv->id.event_handler(&id_priv->id, &work->event)) { | |
1622 | cma_exch(id_priv, CMA_DESTROYING); | |
1623 | destroy = 1; | |
1624 | } | |
1625 | ||
1626 | out: | |
1627 | mutex_unlock(&id_priv->handler_mutex); | |
1628 | cma_deref_id(id_priv); | |
1629 | if (destroy) | |
1630 | rdma_destroy_id(&id_priv->id); | |
1631 | kfree(work); | |
1632 | } | |
1633 | ||
e51060f0 SH |
1634 | static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms) |
1635 | { | |
1636 | struct rdma_route *route = &id_priv->id.route; | |
1637 | struct cma_work *work; | |
1638 | int ret; | |
1639 | ||
1640 | work = kzalloc(sizeof *work, GFP_KERNEL); | |
1641 | if (!work) | |
1642 | return -ENOMEM; | |
1643 | ||
1644 | work->id = id_priv; | |
c4028958 | 1645 | INIT_WORK(&work->work, cma_work_handler); |
e51060f0 SH |
1646 | work->old_state = CMA_ROUTE_QUERY; |
1647 | work->new_state = CMA_ROUTE_RESOLVED; | |
1648 | work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; | |
1649 | ||
1650 | route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL); | |
1651 | if (!route->path_rec) { | |
1652 | ret = -ENOMEM; | |
1653 | goto err1; | |
1654 | } | |
1655 | ||
1656 | ret = cma_query_ib_route(id_priv, timeout_ms, work); | |
1657 | if (ret) | |
1658 | goto err2; | |
1659 | ||
1660 | return 0; | |
1661 | err2: | |
1662 | kfree(route->path_rec); | |
1663 | route->path_rec = NULL; | |
1664 | err1: | |
1665 | kfree(work); | |
1666 | return ret; | |
1667 | } | |
1668 | ||
1669 | int rdma_set_ib_paths(struct rdma_cm_id *id, | |
1670 | struct ib_sa_path_rec *path_rec, int num_paths) | |
1671 | { | |
1672 | struct rdma_id_private *id_priv; | |
1673 | int ret; | |
1674 | ||
1675 | id_priv = container_of(id, struct rdma_id_private, id); | |
1676 | if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_RESOLVED)) | |
1677 | return -EINVAL; | |
1678 | ||
9893e742 JL |
1679 | id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths, |
1680 | GFP_KERNEL); | |
e51060f0 SH |
1681 | if (!id->route.path_rec) { |
1682 | ret = -ENOMEM; | |
1683 | goto err; | |
1684 | } | |
1685 | ||
ae2d9293 | 1686 | id->route.num_paths = num_paths; |
e51060f0 SH |
1687 | return 0; |
1688 | err: | |
1689 | cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_ADDR_RESOLVED); | |
1690 | return ret; | |
1691 | } | |
1692 | EXPORT_SYMBOL(rdma_set_ib_paths); | |
1693 | ||
07ebafba TT |
1694 | static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms) |
1695 | { | |
1696 | struct cma_work *work; | |
1697 | ||
1698 | work = kzalloc(sizeof *work, GFP_KERNEL); | |
1699 | if (!work) | |
1700 | return -ENOMEM; | |
1701 | ||
1702 | work->id = id_priv; | |
c4028958 | 1703 | INIT_WORK(&work->work, cma_work_handler); |
07ebafba TT |
1704 | work->old_state = CMA_ROUTE_QUERY; |
1705 | work->new_state = CMA_ROUTE_RESOLVED; | |
1706 | work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; | |
1707 | queue_work(cma_wq, &work->work); | |
1708 | return 0; | |
1709 | } | |
1710 | ||
e51060f0 SH |
1711 | int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms) |
1712 | { | |
1713 | struct rdma_id_private *id_priv; | |
1714 | int ret; | |
1715 | ||
1716 | id_priv = container_of(id, struct rdma_id_private, id); | |
1717 | if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_QUERY)) | |
1718 | return -EINVAL; | |
1719 | ||
1720 | atomic_inc(&id_priv->refcount); | |
07ebafba TT |
1721 | switch (rdma_node_get_transport(id->device->node_type)) { |
1722 | case RDMA_TRANSPORT_IB: | |
e51060f0 SH |
1723 | ret = cma_resolve_ib_route(id_priv, timeout_ms); |
1724 | break; | |
07ebafba TT |
1725 | case RDMA_TRANSPORT_IWARP: |
1726 | ret = cma_resolve_iw_route(id_priv, timeout_ms); | |
1727 | break; | |
e51060f0 SH |
1728 | default: |
1729 | ret = -ENOSYS; | |
1730 | break; | |
1731 | } | |
1732 | if (ret) | |
1733 | goto err; | |
1734 | ||
1735 | return 0; | |
1736 | err: | |
1737 | cma_comp_exch(id_priv, CMA_ROUTE_QUERY, CMA_ADDR_RESOLVED); | |
1738 | cma_deref_id(id_priv); | |
1739 | return ret; | |
1740 | } | |
1741 | EXPORT_SYMBOL(rdma_resolve_route); | |
1742 | ||
1743 | static int cma_bind_loopback(struct rdma_id_private *id_priv) | |
1744 | { | |
1745 | struct cma_device *cma_dev; | |
1746 | struct ib_port_attr port_attr; | |
f0ee3404 | 1747 | union ib_gid gid; |
e51060f0 SH |
1748 | u16 pkey; |
1749 | int ret; | |
1750 | u8 p; | |
1751 | ||
1752 | mutex_lock(&lock); | |
e82153b5 KK |
1753 | if (list_empty(&dev_list)) { |
1754 | ret = -ENODEV; | |
1755 | goto out; | |
1756 | } | |
e51060f0 SH |
1757 | list_for_each_entry(cma_dev, &dev_list, list) |
1758 | for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p) | |
e82153b5 | 1759 | if (!ib_query_port(cma_dev->device, p, &port_attr) && |
e51060f0 SH |
1760 | port_attr.state == IB_PORT_ACTIVE) |
1761 | goto port_found; | |
1762 | ||
e82153b5 KK |
1763 | p = 1; |
1764 | cma_dev = list_entry(dev_list.next, struct cma_device, list); | |
e51060f0 SH |
1765 | |
1766 | port_found: | |
f0ee3404 | 1767 | ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid); |
e51060f0 SH |
1768 | if (ret) |
1769 | goto out; | |
1770 | ||
1771 | ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey); | |
1772 | if (ret) | |
1773 | goto out; | |
1774 | ||
6f8372b6 SH |
1775 | id_priv->id.route.addr.dev_addr.dev_type = |
1776 | (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB) ? | |
1777 | ARPHRD_INFINIBAND : ARPHRD_ETHER; | |
1778 | ||
1779 | rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid); | |
e51060f0 SH |
1780 | ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey); |
1781 | id_priv->id.port_num = p; | |
1782 | cma_attach_to_dev(id_priv, cma_dev); | |
1783 | out: | |
1784 | mutex_unlock(&lock); | |
1785 | return ret; | |
1786 | } | |
1787 | ||
1788 | static void addr_handler(int status, struct sockaddr *src_addr, | |
1789 | struct rdma_dev_addr *dev_addr, void *context) | |
1790 | { | |
1791 | struct rdma_id_private *id_priv = context; | |
a1b1b61f | 1792 | struct rdma_cm_event event; |
e51060f0 | 1793 | |
a1b1b61f | 1794 | memset(&event, 0, sizeof event); |
de910bd9 | 1795 | mutex_lock(&id_priv->handler_mutex); |
61a73c70 SH |
1796 | |
1797 | /* | |
1798 | * Grab mutex to block rdma_destroy_id() from removing the device while | |
1799 | * we're trying to acquire it. | |
1800 | */ | |
1801 | mutex_lock(&lock); | |
1802 | if (!cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_RESOLVED)) { | |
1803 | mutex_unlock(&lock); | |
1804 | goto out; | |
1805 | } | |
1806 | ||
1807 | if (!status && !id_priv->cma_dev) | |
e51060f0 | 1808 | status = cma_acquire_dev(id_priv); |
61a73c70 | 1809 | mutex_unlock(&lock); |
e51060f0 SH |
1810 | |
1811 | if (status) { | |
61a73c70 | 1812 | if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ADDR_BOUND)) |
e51060f0 | 1813 | goto out; |
a1b1b61f SH |
1814 | event.event = RDMA_CM_EVENT_ADDR_ERROR; |
1815 | event.status = status; | |
e51060f0 | 1816 | } else { |
e51060f0 SH |
1817 | memcpy(&id_priv->id.route.addr.src_addr, src_addr, |
1818 | ip_addr_size(src_addr)); | |
a1b1b61f | 1819 | event.event = RDMA_CM_EVENT_ADDR_RESOLVED; |
e51060f0 SH |
1820 | } |
1821 | ||
a1b1b61f | 1822 | if (id_priv->id.event_handler(&id_priv->id, &event)) { |
e51060f0 | 1823 | cma_exch(id_priv, CMA_DESTROYING); |
de910bd9 | 1824 | mutex_unlock(&id_priv->handler_mutex); |
e51060f0 SH |
1825 | cma_deref_id(id_priv); |
1826 | rdma_destroy_id(&id_priv->id); | |
1827 | return; | |
1828 | } | |
1829 | out: | |
de910bd9 | 1830 | mutex_unlock(&id_priv->handler_mutex); |
e51060f0 SH |
1831 | cma_deref_id(id_priv); |
1832 | } | |
1833 | ||
1834 | static int cma_resolve_loopback(struct rdma_id_private *id_priv) | |
1835 | { | |
1836 | struct cma_work *work; | |
6f8372b6 | 1837 | struct sockaddr *src, *dst; |
f0ee3404 | 1838 | union ib_gid gid; |
e51060f0 SH |
1839 | int ret; |
1840 | ||
1841 | work = kzalloc(sizeof *work, GFP_KERNEL); | |
1842 | if (!work) | |
1843 | return -ENOMEM; | |
1844 | ||
1845 | if (!id_priv->cma_dev) { | |
1846 | ret = cma_bind_loopback(id_priv); | |
1847 | if (ret) | |
1848 | goto err; | |
1849 | } | |
1850 | ||
6f8372b6 SH |
1851 | rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid); |
1852 | rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid); | |
e51060f0 | 1853 | |
6f8372b6 SH |
1854 | src = (struct sockaddr *) &id_priv->id.route.addr.src_addr; |
1855 | if (cma_zero_addr(src)) { | |
1856 | dst = (struct sockaddr *) &id_priv->id.route.addr.dst_addr; | |
1857 | if ((src->sa_family = dst->sa_family) == AF_INET) { | |
1858 | ((struct sockaddr_in *) src)->sin_addr.s_addr = | |
1859 | ((struct sockaddr_in *) dst)->sin_addr.s_addr; | |
1860 | } else { | |
1861 | ipv6_addr_copy(&((struct sockaddr_in6 *) src)->sin6_addr, | |
1862 | &((struct sockaddr_in6 *) dst)->sin6_addr); | |
1863 | } | |
e51060f0 SH |
1864 | } |
1865 | ||
1866 | work->id = id_priv; | |
c4028958 | 1867 | INIT_WORK(&work->work, cma_work_handler); |
e51060f0 SH |
1868 | work->old_state = CMA_ADDR_QUERY; |
1869 | work->new_state = CMA_ADDR_RESOLVED; | |
1870 | work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED; | |
1871 | queue_work(cma_wq, &work->work); | |
1872 | return 0; | |
1873 | err: | |
1874 | kfree(work); | |
1875 | return ret; | |
1876 | } | |
1877 | ||
1878 | static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, | |
1879 | struct sockaddr *dst_addr) | |
1880 | { | |
d14714df SH |
1881 | if (!src_addr || !src_addr->sa_family) { |
1882 | src_addr = (struct sockaddr *) &id->route.addr.src_addr; | |
1883 | if ((src_addr->sa_family = dst_addr->sa_family) == AF_INET6) { | |
1884 | ((struct sockaddr_in6 *) src_addr)->sin6_scope_id = | |
1885 | ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id; | |
1886 | } | |
1887 | } | |
1888 | return rdma_bind_addr(id, src_addr); | |
e51060f0 SH |
1889 | } |
1890 | ||
1891 | int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, | |
1892 | struct sockaddr *dst_addr, int timeout_ms) | |
1893 | { | |
1894 | struct rdma_id_private *id_priv; | |
1895 | int ret; | |
1896 | ||
1897 | id_priv = container_of(id, struct rdma_id_private, id); | |
1898 | if (id_priv->state == CMA_IDLE) { | |
1899 | ret = cma_bind_addr(id, src_addr, dst_addr); | |
1900 | if (ret) | |
1901 | return ret; | |
1902 | } | |
1903 | ||
1904 | if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_ADDR_QUERY)) | |
1905 | return -EINVAL; | |
1906 | ||
1907 | atomic_inc(&id_priv->refcount); | |
1908 | memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr)); | |
1909 | if (cma_any_addr(dst_addr)) | |
1910 | ret = cma_resolve_loopback(id_priv); | |
1911 | else | |
3f446754 | 1912 | ret = rdma_resolve_ip(&addr_client, (struct sockaddr *) &id->route.addr.src_addr, |
7a118df3 | 1913 | dst_addr, &id->route.addr.dev_addr, |
e51060f0 SH |
1914 | timeout_ms, addr_handler, id_priv); |
1915 | if (ret) | |
1916 | goto err; | |
1917 | ||
1918 | return 0; | |
1919 | err: | |
1920 | cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_BOUND); | |
1921 | cma_deref_id(id_priv); | |
1922 | return ret; | |
1923 | } | |
1924 | EXPORT_SYMBOL(rdma_resolve_addr); | |
1925 | ||
1926 | static void cma_bind_port(struct rdma_bind_list *bind_list, | |
1927 | struct rdma_id_private *id_priv) | |
1928 | { | |
1929 | struct sockaddr_in *sin; | |
1930 | ||
1931 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; | |
1932 | sin->sin_port = htons(bind_list->port); | |
1933 | id_priv->bind_list = bind_list; | |
1934 | hlist_add_head(&id_priv->node, &bind_list->owners); | |
1935 | } | |
1936 | ||
1937 | static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv, | |
1938 | unsigned short snum) | |
1939 | { | |
1940 | struct rdma_bind_list *bind_list; | |
aedec080 | 1941 | int port, ret; |
e51060f0 | 1942 | |
cb164b8c | 1943 | bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL); |
e51060f0 SH |
1944 | if (!bind_list) |
1945 | return -ENOMEM; | |
1946 | ||
aedec080 SH |
1947 | do { |
1948 | ret = idr_get_new_above(ps, bind_list, snum, &port); | |
1949 | } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL)); | |
1950 | ||
1951 | if (ret) | |
1952 | goto err1; | |
1953 | ||
1954 | if (port != snum) { | |
1955 | ret = -EADDRNOTAVAIL; | |
1956 | goto err2; | |
1957 | } | |
1958 | ||
1959 | bind_list->ps = ps; | |
1960 | bind_list->port = (unsigned short) port; | |
1961 | cma_bind_port(bind_list, id_priv); | |
1962 | return 0; | |
1963 | err2: | |
1964 | idr_remove(ps, port); | |
1965 | err1: | |
1966 | kfree(bind_list); | |
1967 | return ret; | |
1968 | } | |
e51060f0 | 1969 | |
aedec080 SH |
1970 | static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv) |
1971 | { | |
5d7220e8 TH |
1972 | static unsigned int last_used_port; |
1973 | int low, high, remaining; | |
1974 | unsigned int rover; | |
e51060f0 | 1975 | |
227b60f5 | 1976 | inet_get_local_port_range(&low, &high); |
5d7220e8 TH |
1977 | remaining = (high - low) + 1; |
1978 | rover = net_random() % remaining + low; | |
1979 | retry: | |
1980 | if (last_used_port != rover && | |
1981 | !idr_find(ps, (unsigned short) rover)) { | |
1982 | int ret = cma_alloc_port(ps, id_priv, rover); | |
1983 | /* | |
1984 | * Remember previously used port number in order to avoid | |
1985 | * re-using same port immediately after it is closed. | |
1986 | */ | |
1987 | if (!ret) | |
1988 | last_used_port = rover; | |
1989 | if (ret != -EADDRNOTAVAIL) | |
1990 | return ret; | |
e51060f0 | 1991 | } |
5d7220e8 TH |
1992 | if (--remaining) { |
1993 | rover++; | |
1994 | if ((rover < low) || (rover > high)) | |
1995 | rover = low; | |
1996 | goto retry; | |
1997 | } | |
1998 | return -EADDRNOTAVAIL; | |
e51060f0 SH |
1999 | } |
2000 | ||
2001 | static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv) | |
2002 | { | |
2003 | struct rdma_id_private *cur_id; | |
2004 | struct sockaddr_in *sin, *cur_sin; | |
2005 | struct rdma_bind_list *bind_list; | |
2006 | struct hlist_node *node; | |
2007 | unsigned short snum; | |
2008 | ||
2009 | sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; | |
2010 | snum = ntohs(sin->sin_port); | |
2011 | if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) | |
2012 | return -EACCES; | |
2013 | ||
2014 | bind_list = idr_find(ps, snum); | |
2015 | if (!bind_list) | |
2016 | return cma_alloc_port(ps, id_priv, snum); | |
2017 | ||
2018 | /* | |
2019 | * We don't support binding to any address if anyone is bound to | |
2020 | * a specific address on the same port. | |
2021 | */ | |
3f446754 | 2022 | if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr)) |
e51060f0 SH |
2023 | return -EADDRNOTAVAIL; |
2024 | ||
2025 | hlist_for_each_entry(cur_id, node, &bind_list->owners, node) { | |
3f446754 | 2026 | if (cma_any_addr((struct sockaddr *) &cur_id->id.route.addr.src_addr)) |
e51060f0 | 2027 | return -EADDRNOTAVAIL; |
3cd96564 | 2028 | |
e51060f0 SH |
2029 | cur_sin = (struct sockaddr_in *) &cur_id->id.route.addr.src_addr; |
2030 | if (sin->sin_addr.s_addr == cur_sin->sin_addr.s_addr) | |
2031 | return -EADDRINUSE; | |
2032 | } | |
2033 | ||
2034 | cma_bind_port(bind_list, id_priv); | |
2035 | return 0; | |
2036 | } | |
2037 | ||
2038 | static int cma_get_port(struct rdma_id_private *id_priv) | |
2039 | { | |
2040 | struct idr *ps; | |
2041 | int ret; | |
2042 | ||
2043 | switch (id_priv->id.ps) { | |
2044 | case RDMA_PS_SDP: | |
2045 | ps = &sdp_ps; | |
2046 | break; | |
2047 | case RDMA_PS_TCP: | |
2048 | ps = &tcp_ps; | |
2049 | break; | |
628e5f6d SH |
2050 | case RDMA_PS_UDP: |
2051 | ps = &udp_ps; | |
2052 | break; | |
c8f6a362 SH |
2053 | case RDMA_PS_IPOIB: |
2054 | ps = &ipoib_ps; | |
2055 | break; | |
e51060f0 SH |
2056 | default: |
2057 | return -EPROTONOSUPPORT; | |
2058 | } | |
2059 | ||
2060 | mutex_lock(&lock); | |
3f446754 | 2061 | if (cma_any_port((struct sockaddr *) &id_priv->id.route.addr.src_addr)) |
aedec080 | 2062 | ret = cma_alloc_any_port(ps, id_priv); |
e51060f0 SH |
2063 | else |
2064 | ret = cma_use_port(ps, id_priv); | |
2065 | mutex_unlock(&lock); | |
2066 | ||
2067 | return ret; | |
2068 | } | |
2069 | ||
d14714df SH |
2070 | static int cma_check_linklocal(struct rdma_dev_addr *dev_addr, |
2071 | struct sockaddr *addr) | |
2072 | { | |
fd4582a3 | 2073 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
d14714df SH |
2074 | struct sockaddr_in6 *sin6; |
2075 | ||
2076 | if (addr->sa_family != AF_INET6) | |
2077 | return 0; | |
2078 | ||
2079 | sin6 = (struct sockaddr_in6 *) addr; | |
2080 | if ((ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) && | |
2081 | !sin6->sin6_scope_id) | |
2082 | return -EINVAL; | |
2083 | ||
2084 | dev_addr->bound_dev_if = sin6->sin6_scope_id; | |
2085 | #endif | |
2086 | return 0; | |
2087 | } | |
2088 | ||
e51060f0 SH |
2089 | int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr) |
2090 | { | |
2091 | struct rdma_id_private *id_priv; | |
2092 | int ret; | |
2093 | ||
1f5175ad | 2094 | if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6) |
e51060f0 SH |
2095 | return -EAFNOSUPPORT; |
2096 | ||
2097 | id_priv = container_of(id, struct rdma_id_private, id); | |
2098 | if (!cma_comp_exch(id_priv, CMA_IDLE, CMA_ADDR_BOUND)) | |
2099 | return -EINVAL; | |
2100 | ||
d14714df SH |
2101 | ret = cma_check_linklocal(&id->route.addr.dev_addr, addr); |
2102 | if (ret) | |
2103 | goto err1; | |
2104 | ||
8523c048 | 2105 | if (!cma_any_addr(addr)) { |
e51060f0 | 2106 | ret = rdma_translate_ip(addr, &id->route.addr.dev_addr); |
e51060f0 | 2107 | if (ret) |
255d0c14 KK |
2108 | goto err1; |
2109 | ||
2110 | mutex_lock(&lock); | |
2111 | ret = cma_acquire_dev(id_priv); | |
2112 | mutex_unlock(&lock); | |
2113 | if (ret) | |
2114 | goto err1; | |
e51060f0 SH |
2115 | } |
2116 | ||
2117 | memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr)); | |
2118 | ret = cma_get_port(id_priv); | |
2119 | if (ret) | |
255d0c14 | 2120 | goto err2; |
e51060f0 SH |
2121 | |
2122 | return 0; | |
255d0c14 | 2123 | err2: |
6f8372b6 | 2124 | if (id_priv->cma_dev) { |
255d0c14 KK |
2125 | mutex_lock(&lock); |
2126 | cma_detach_from_dev(id_priv); | |
2127 | mutex_unlock(&lock); | |
2128 | } | |
2129 | err1: | |
e51060f0 SH |
2130 | cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_IDLE); |
2131 | return ret; | |
2132 | } | |
2133 | EXPORT_SYMBOL(rdma_bind_addr); | |
2134 | ||
2135 | static int cma_format_hdr(void *hdr, enum rdma_port_space ps, | |
2136 | struct rdma_route *route) | |
2137 | { | |
e51060f0 SH |
2138 | struct cma_hdr *cma_hdr; |
2139 | struct sdp_hh *sdp_hdr; | |
2140 | ||
1f5175ad AS |
2141 | if (route->addr.src_addr.ss_family == AF_INET) { |
2142 | struct sockaddr_in *src4, *dst4; | |
2143 | ||
2144 | src4 = (struct sockaddr_in *) &route->addr.src_addr; | |
2145 | dst4 = (struct sockaddr_in *) &route->addr.dst_addr; | |
2146 | ||
2147 | switch (ps) { | |
2148 | case RDMA_PS_SDP: | |
2149 | sdp_hdr = hdr; | |
2150 | if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION) | |
2151 | return -EINVAL; | |
2152 | sdp_set_ip_ver(sdp_hdr, 4); | |
2153 | sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; | |
2154 | sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; | |
2155 | sdp_hdr->port = src4->sin_port; | |
2156 | break; | |
2157 | default: | |
2158 | cma_hdr = hdr; | |
2159 | cma_hdr->cma_version = CMA_VERSION; | |
2160 | cma_set_ip_ver(cma_hdr, 4); | |
2161 | cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; | |
2162 | cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; | |
2163 | cma_hdr->port = src4->sin_port; | |
2164 | break; | |
2165 | } | |
2166 | } else { | |
2167 | struct sockaddr_in6 *src6, *dst6; | |
2168 | ||
2169 | src6 = (struct sockaddr_in6 *) &route->addr.src_addr; | |
2170 | dst6 = (struct sockaddr_in6 *) &route->addr.dst_addr; | |
2171 | ||
2172 | switch (ps) { | |
2173 | case RDMA_PS_SDP: | |
2174 | sdp_hdr = hdr; | |
2175 | if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION) | |
2176 | return -EINVAL; | |
2177 | sdp_set_ip_ver(sdp_hdr, 6); | |
2178 | sdp_hdr->src_addr.ip6 = src6->sin6_addr; | |
2179 | sdp_hdr->dst_addr.ip6 = dst6->sin6_addr; | |
2180 | sdp_hdr->port = src6->sin6_port; | |
2181 | break; | |
2182 | default: | |
2183 | cma_hdr = hdr; | |
2184 | cma_hdr->cma_version = CMA_VERSION; | |
2185 | cma_set_ip_ver(cma_hdr, 6); | |
2186 | cma_hdr->src_addr.ip6 = src6->sin6_addr; | |
2187 | cma_hdr->dst_addr.ip6 = dst6->sin6_addr; | |
2188 | cma_hdr->port = src6->sin6_port; | |
2189 | break; | |
2190 | } | |
e51060f0 SH |
2191 | } |
2192 | return 0; | |
2193 | } | |
2194 | ||
628e5f6d SH |
2195 | static int cma_sidr_rep_handler(struct ib_cm_id *cm_id, |
2196 | struct ib_cm_event *ib_event) | |
2197 | { | |
2198 | struct rdma_id_private *id_priv = cm_id->context; | |
2199 | struct rdma_cm_event event; | |
2200 | struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd; | |
2201 | int ret = 0; | |
2202 | ||
de910bd9 | 2203 | if (cma_disable_callback(id_priv, CMA_CONNECT)) |
8aa08602 | 2204 | return 0; |
628e5f6d | 2205 | |
8aa08602 | 2206 | memset(&event, 0, sizeof event); |
628e5f6d SH |
2207 | switch (ib_event->event) { |
2208 | case IB_CM_SIDR_REQ_ERROR: | |
2209 | event.event = RDMA_CM_EVENT_UNREACHABLE; | |
2210 | event.status = -ETIMEDOUT; | |
2211 | break; | |
2212 | case IB_CM_SIDR_REP_RECEIVED: | |
2213 | event.param.ud.private_data = ib_event->private_data; | |
2214 | event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; | |
2215 | if (rep->status != IB_SIDR_SUCCESS) { | |
2216 | event.event = RDMA_CM_EVENT_UNREACHABLE; | |
2217 | event.status = ib_event->param.sidr_rep_rcvd.status; | |
2218 | break; | |
2219 | } | |
d2ca39f2 YE |
2220 | ret = cma_set_qkey(id_priv); |
2221 | if (ret) { | |
2222 | event.event = RDMA_CM_EVENT_ADDR_ERROR; | |
2223 | event.status = -EINVAL; | |
2224 | break; | |
2225 | } | |
c8f6a362 | 2226 | if (id_priv->qkey != rep->qkey) { |
628e5f6d SH |
2227 | event.event = RDMA_CM_EVENT_UNREACHABLE; |
2228 | event.status = -EINVAL; | |
2229 | break; | |
2230 | } | |
2231 | ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num, | |
2232 | id_priv->id.route.path_rec, | |
2233 | &event.param.ud.ah_attr); | |
2234 | event.param.ud.qp_num = rep->qpn; | |
2235 | event.param.ud.qkey = rep->qkey; | |
2236 | event.event = RDMA_CM_EVENT_ESTABLISHED; | |
2237 | event.status = 0; | |
2238 | break; | |
2239 | default: | |
468f2239 | 2240 | printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n", |
628e5f6d SH |
2241 | ib_event->event); |
2242 | goto out; | |
2243 | } | |
2244 | ||
2245 | ret = id_priv->id.event_handler(&id_priv->id, &event); | |
2246 | if (ret) { | |
2247 | /* Destroy the CM ID by returning a non-zero value. */ | |
2248 | id_priv->cm_id.ib = NULL; | |
2249 | cma_exch(id_priv, CMA_DESTROYING); | |
de910bd9 | 2250 | mutex_unlock(&id_priv->handler_mutex); |
628e5f6d SH |
2251 | rdma_destroy_id(&id_priv->id); |
2252 | return ret; | |
2253 | } | |
2254 | out: | |
de910bd9 | 2255 | mutex_unlock(&id_priv->handler_mutex); |
628e5f6d SH |
2256 | return ret; |
2257 | } | |
2258 | ||
2259 | static int cma_resolve_ib_udp(struct rdma_id_private *id_priv, | |
2260 | struct rdma_conn_param *conn_param) | |
2261 | { | |
2262 | struct ib_cm_sidr_req_param req; | |
2263 | struct rdma_route *route; | |
2264 | int ret; | |
2265 | ||
2266 | req.private_data_len = sizeof(struct cma_hdr) + | |
2267 | conn_param->private_data_len; | |
2268 | req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC); | |
2269 | if (!req.private_data) | |
2270 | return -ENOMEM; | |
2271 | ||
2272 | if (conn_param->private_data && conn_param->private_data_len) | |
2273 | memcpy((void *) req.private_data + sizeof(struct cma_hdr), | |
2274 | conn_param->private_data, conn_param->private_data_len); | |
2275 | ||
2276 | route = &id_priv->id.route; | |
2277 | ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route); | |
2278 | if (ret) | |
2279 | goto out; | |
2280 | ||
2281 | id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, | |
2282 | cma_sidr_rep_handler, id_priv); | |
2283 | if (IS_ERR(id_priv->cm_id.ib)) { | |
2284 | ret = PTR_ERR(id_priv->cm_id.ib); | |
2285 | goto out; | |
2286 | } | |
2287 | ||
2288 | req.path = route->path_rec; | |
2289 | req.service_id = cma_get_service_id(id_priv->id.ps, | |
3f446754 | 2290 | (struct sockaddr *) &route->addr.dst_addr); |
628e5f6d SH |
2291 | req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8); |
2292 | req.max_cm_retries = CMA_MAX_CM_RETRIES; | |
2293 | ||
2294 | ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req); | |
2295 | if (ret) { | |
2296 | ib_destroy_cm_id(id_priv->cm_id.ib); | |
2297 | id_priv->cm_id.ib = NULL; | |
2298 | } | |
2299 | out: | |
2300 | kfree(req.private_data); | |
2301 | return ret; | |
2302 | } | |
2303 | ||
e51060f0 SH |
2304 | static int cma_connect_ib(struct rdma_id_private *id_priv, |
2305 | struct rdma_conn_param *conn_param) | |
2306 | { | |
2307 | struct ib_cm_req_param req; | |
2308 | struct rdma_route *route; | |
2309 | void *private_data; | |
2310 | int offset, ret; | |
2311 | ||
2312 | memset(&req, 0, sizeof req); | |
2313 | offset = cma_user_data_offset(id_priv->id.ps); | |
2314 | req.private_data_len = offset + conn_param->private_data_len; | |
2315 | private_data = kzalloc(req.private_data_len, GFP_ATOMIC); | |
2316 | if (!private_data) | |
2317 | return -ENOMEM; | |
2318 | ||
2319 | if (conn_param->private_data && conn_param->private_data_len) | |
2320 | memcpy(private_data + offset, conn_param->private_data, | |
2321 | conn_param->private_data_len); | |
2322 | ||
2323 | id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_ib_handler, | |
2324 | id_priv); | |
2325 | if (IS_ERR(id_priv->cm_id.ib)) { | |
2326 | ret = PTR_ERR(id_priv->cm_id.ib); | |
2327 | goto out; | |
2328 | } | |
2329 | ||
2330 | route = &id_priv->id.route; | |
2331 | ret = cma_format_hdr(private_data, id_priv->id.ps, route); | |
2332 | if (ret) | |
2333 | goto out; | |
2334 | req.private_data = private_data; | |
2335 | ||
2336 | req.primary_path = &route->path_rec[0]; | |
2337 | if (route->num_paths == 2) | |
2338 | req.alternate_path = &route->path_rec[1]; | |
2339 | ||
2340 | req.service_id = cma_get_service_id(id_priv->id.ps, | |
3f446754 | 2341 | (struct sockaddr *) &route->addr.dst_addr); |
e51060f0 | 2342 | req.qp_num = id_priv->qp_num; |
9b2e9c0c | 2343 | req.qp_type = IB_QPT_RC; |
e51060f0 SH |
2344 | req.starting_psn = id_priv->seq_num; |
2345 | req.responder_resources = conn_param->responder_resources; | |
2346 | req.initiator_depth = conn_param->initiator_depth; | |
2347 | req.flow_control = conn_param->flow_control; | |
2348 | req.retry_count = conn_param->retry_count; | |
2349 | req.rnr_retry_count = conn_param->rnr_retry_count; | |
2350 | req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; | |
2351 | req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; | |
2352 | req.max_cm_retries = CMA_MAX_CM_RETRIES; | |
2353 | req.srq = id_priv->srq ? 1 : 0; | |
2354 | ||
2355 | ret = ib_send_cm_req(id_priv->cm_id.ib, &req); | |
2356 | out: | |
675a027c KK |
2357 | if (ret && !IS_ERR(id_priv->cm_id.ib)) { |
2358 | ib_destroy_cm_id(id_priv->cm_id.ib); | |
2359 | id_priv->cm_id.ib = NULL; | |
2360 | } | |
2361 | ||
e51060f0 SH |
2362 | kfree(private_data); |
2363 | return ret; | |
2364 | } | |
2365 | ||
07ebafba TT |
2366 | static int cma_connect_iw(struct rdma_id_private *id_priv, |
2367 | struct rdma_conn_param *conn_param) | |
2368 | { | |
2369 | struct iw_cm_id *cm_id; | |
2370 | struct sockaddr_in* sin; | |
2371 | int ret; | |
2372 | struct iw_cm_conn_param iw_param; | |
2373 | ||
2374 | cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv); | |
2375 | if (IS_ERR(cm_id)) { | |
2376 | ret = PTR_ERR(cm_id); | |
2377 | goto out; | |
2378 | } | |
2379 | ||
2380 | id_priv->cm_id.iw = cm_id; | |
2381 | ||
2382 | sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr; | |
2383 | cm_id->local_addr = *sin; | |
2384 | ||
2385 | sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr; | |
2386 | cm_id->remote_addr = *sin; | |
2387 | ||
5851bb89 | 2388 | ret = cma_modify_qp_rtr(id_priv, conn_param); |
675a027c KK |
2389 | if (ret) |
2390 | goto out; | |
07ebafba TT |
2391 | |
2392 | iw_param.ord = conn_param->initiator_depth; | |
2393 | iw_param.ird = conn_param->responder_resources; | |
2394 | iw_param.private_data = conn_param->private_data; | |
2395 | iw_param.private_data_len = conn_param->private_data_len; | |
2396 | if (id_priv->id.qp) | |
2397 | iw_param.qpn = id_priv->qp_num; | |
2398 | else | |
2399 | iw_param.qpn = conn_param->qp_num; | |
2400 | ret = iw_cm_connect(cm_id, &iw_param); | |
2401 | out: | |
675a027c KK |
2402 | if (ret && !IS_ERR(cm_id)) { |
2403 | iw_destroy_cm_id(cm_id); | |
2404 | id_priv->cm_id.iw = NULL; | |
2405 | } | |
07ebafba TT |
2406 | return ret; |
2407 | } | |
2408 | ||
e51060f0 SH |
2409 | int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) |
2410 | { | |
2411 | struct rdma_id_private *id_priv; | |
2412 | int ret; | |
2413 | ||
2414 | id_priv = container_of(id, struct rdma_id_private, id); | |
2415 | if (!cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_CONNECT)) | |
2416 | return -EINVAL; | |
2417 | ||
2418 | if (!id->qp) { | |
2419 | id_priv->qp_num = conn_param->qp_num; | |
e51060f0 SH |
2420 | id_priv->srq = conn_param->srq; |
2421 | } | |
2422 | ||
07ebafba TT |
2423 | switch (rdma_node_get_transport(id->device->node_type)) { |
2424 | case RDMA_TRANSPORT_IB: | |
c8f6a362 | 2425 | if (cma_is_ud_ps(id->ps)) |
628e5f6d SH |
2426 | ret = cma_resolve_ib_udp(id_priv, conn_param); |
2427 | else | |
2428 | ret = cma_connect_ib(id_priv, conn_param); | |
e51060f0 | 2429 | break; |
07ebafba TT |
2430 | case RDMA_TRANSPORT_IWARP: |
2431 | ret = cma_connect_iw(id_priv, conn_param); | |
2432 | break; | |
e51060f0 SH |
2433 | default: |
2434 | ret = -ENOSYS; | |
2435 | break; | |
2436 | } | |
2437 | if (ret) | |
2438 | goto err; | |
2439 | ||
2440 | return 0; | |
2441 | err: | |
2442 | cma_comp_exch(id_priv, CMA_CONNECT, CMA_ROUTE_RESOLVED); | |
2443 | return ret; | |
2444 | } | |
2445 | EXPORT_SYMBOL(rdma_connect); | |
2446 | ||
2447 | static int cma_accept_ib(struct rdma_id_private *id_priv, | |
2448 | struct rdma_conn_param *conn_param) | |
2449 | { | |
2450 | struct ib_cm_rep_param rep; | |
5851bb89 | 2451 | int ret; |
0fe313b0 | 2452 | |
5851bb89 SH |
2453 | ret = cma_modify_qp_rtr(id_priv, conn_param); |
2454 | if (ret) | |
2455 | goto out; | |
0fe313b0 | 2456 | |
5851bb89 SH |
2457 | ret = cma_modify_qp_rts(id_priv, conn_param); |
2458 | if (ret) | |
2459 | goto out; | |
e51060f0 SH |
2460 | |
2461 | memset(&rep, 0, sizeof rep); | |
2462 | rep.qp_num = id_priv->qp_num; | |
2463 | rep.starting_psn = id_priv->seq_num; | |
2464 | rep.private_data = conn_param->private_data; | |
2465 | rep.private_data_len = conn_param->private_data_len; | |
2466 | rep.responder_resources = conn_param->responder_resources; | |
2467 | rep.initiator_depth = conn_param->initiator_depth; | |
e51060f0 SH |
2468 | rep.failover_accepted = 0; |
2469 | rep.flow_control = conn_param->flow_control; | |
2470 | rep.rnr_retry_count = conn_param->rnr_retry_count; | |
2471 | rep.srq = id_priv->srq ? 1 : 0; | |
2472 | ||
0fe313b0 SH |
2473 | ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep); |
2474 | out: | |
2475 | return ret; | |
e51060f0 SH |
2476 | } |
2477 | ||
07ebafba TT |
2478 | static int cma_accept_iw(struct rdma_id_private *id_priv, |
2479 | struct rdma_conn_param *conn_param) | |
2480 | { | |
2481 | struct iw_cm_conn_param iw_param; | |
2482 | int ret; | |
2483 | ||
5851bb89 | 2484 | ret = cma_modify_qp_rtr(id_priv, conn_param); |
07ebafba TT |
2485 | if (ret) |
2486 | return ret; | |
2487 | ||
2488 | iw_param.ord = conn_param->initiator_depth; | |
2489 | iw_param.ird = conn_param->responder_resources; | |
2490 | iw_param.private_data = conn_param->private_data; | |
2491 | iw_param.private_data_len = conn_param->private_data_len; | |
2492 | if (id_priv->id.qp) { | |
2493 | iw_param.qpn = id_priv->qp_num; | |
2494 | } else | |
2495 | iw_param.qpn = conn_param->qp_num; | |
2496 | ||
2497 | return iw_cm_accept(id_priv->cm_id.iw, &iw_param); | |
2498 | } | |
2499 | ||
628e5f6d SH |
2500 | static int cma_send_sidr_rep(struct rdma_id_private *id_priv, |
2501 | enum ib_cm_sidr_status status, | |
2502 | const void *private_data, int private_data_len) | |
2503 | { | |
2504 | struct ib_cm_sidr_rep_param rep; | |
d2ca39f2 | 2505 | int ret; |
628e5f6d SH |
2506 | |
2507 | memset(&rep, 0, sizeof rep); | |
2508 | rep.status = status; | |
2509 | if (status == IB_SIDR_SUCCESS) { | |
d2ca39f2 YE |
2510 | ret = cma_set_qkey(id_priv); |
2511 | if (ret) | |
2512 | return ret; | |
628e5f6d | 2513 | rep.qp_num = id_priv->qp_num; |
c8f6a362 | 2514 | rep.qkey = id_priv->qkey; |
628e5f6d SH |
2515 | } |
2516 | rep.private_data = private_data; | |
2517 | rep.private_data_len = private_data_len; | |
2518 | ||
2519 | return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep); | |
2520 | } | |
2521 | ||
e51060f0 SH |
2522 | int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) |
2523 | { | |
2524 | struct rdma_id_private *id_priv; | |
2525 | int ret; | |
2526 | ||
2527 | id_priv = container_of(id, struct rdma_id_private, id); | |
2528 | if (!cma_comp(id_priv, CMA_CONNECT)) | |
2529 | return -EINVAL; | |
2530 | ||
2531 | if (!id->qp && conn_param) { | |
2532 | id_priv->qp_num = conn_param->qp_num; | |
e51060f0 SH |
2533 | id_priv->srq = conn_param->srq; |
2534 | } | |
2535 | ||
07ebafba TT |
2536 | switch (rdma_node_get_transport(id->device->node_type)) { |
2537 | case RDMA_TRANSPORT_IB: | |
c8f6a362 | 2538 | if (cma_is_ud_ps(id->ps)) |
628e5f6d SH |
2539 | ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS, |
2540 | conn_param->private_data, | |
2541 | conn_param->private_data_len); | |
2542 | else if (conn_param) | |
e51060f0 SH |
2543 | ret = cma_accept_ib(id_priv, conn_param); |
2544 | else | |
2545 | ret = cma_rep_recv(id_priv); | |
2546 | break; | |
07ebafba TT |
2547 | case RDMA_TRANSPORT_IWARP: |
2548 | ret = cma_accept_iw(id_priv, conn_param); | |
2549 | break; | |
e51060f0 SH |
2550 | default: |
2551 | ret = -ENOSYS; | |
2552 | break; | |
2553 | } | |
2554 | ||
2555 | if (ret) | |
2556 | goto reject; | |
2557 | ||
2558 | return 0; | |
2559 | reject: | |
c5483388 | 2560 | cma_modify_qp_err(id_priv); |
e51060f0 SH |
2561 | rdma_reject(id, NULL, 0); |
2562 | return ret; | |
2563 | } | |
2564 | EXPORT_SYMBOL(rdma_accept); | |
2565 | ||
0fe313b0 SH |
2566 | int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event) |
2567 | { | |
2568 | struct rdma_id_private *id_priv; | |
2569 | int ret; | |
2570 | ||
2571 | id_priv = container_of(id, struct rdma_id_private, id); | |
6c719f5c | 2572 | if (!cma_has_cm_dev(id_priv)) |
0fe313b0 SH |
2573 | return -EINVAL; |
2574 | ||
2575 | switch (id->device->node_type) { | |
2576 | case RDMA_NODE_IB_CA: | |
2577 | ret = ib_cm_notify(id_priv->cm_id.ib, event); | |
2578 | break; | |
2579 | default: | |
2580 | ret = 0; | |
2581 | break; | |
2582 | } | |
2583 | return ret; | |
2584 | } | |
2585 | EXPORT_SYMBOL(rdma_notify); | |
2586 | ||
e51060f0 SH |
2587 | int rdma_reject(struct rdma_cm_id *id, const void *private_data, |
2588 | u8 private_data_len) | |
2589 | { | |
2590 | struct rdma_id_private *id_priv; | |
2591 | int ret; | |
2592 | ||
2593 | id_priv = container_of(id, struct rdma_id_private, id); | |
6c719f5c | 2594 | if (!cma_has_cm_dev(id_priv)) |
e51060f0 SH |
2595 | return -EINVAL; |
2596 | ||
07ebafba TT |
2597 | switch (rdma_node_get_transport(id->device->node_type)) { |
2598 | case RDMA_TRANSPORT_IB: | |
c8f6a362 | 2599 | if (cma_is_ud_ps(id->ps)) |
628e5f6d SH |
2600 | ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, |
2601 | private_data, private_data_len); | |
2602 | else | |
2603 | ret = ib_send_cm_rej(id_priv->cm_id.ib, | |
2604 | IB_CM_REJ_CONSUMER_DEFINED, NULL, | |
2605 | 0, private_data, private_data_len); | |
e51060f0 | 2606 | break; |
07ebafba TT |
2607 | case RDMA_TRANSPORT_IWARP: |
2608 | ret = iw_cm_reject(id_priv->cm_id.iw, | |
2609 | private_data, private_data_len); | |
2610 | break; | |
e51060f0 SH |
2611 | default: |
2612 | ret = -ENOSYS; | |
2613 | break; | |
2614 | } | |
2615 | return ret; | |
2616 | } | |
2617 | EXPORT_SYMBOL(rdma_reject); | |
2618 | ||
2619 | int rdma_disconnect(struct rdma_cm_id *id) | |
2620 | { | |
2621 | struct rdma_id_private *id_priv; | |
2622 | int ret; | |
2623 | ||
2624 | id_priv = container_of(id, struct rdma_id_private, id); | |
6c719f5c | 2625 | if (!cma_has_cm_dev(id_priv)) |
e51060f0 SH |
2626 | return -EINVAL; |
2627 | ||
07ebafba TT |
2628 | switch (rdma_node_get_transport(id->device->node_type)) { |
2629 | case RDMA_TRANSPORT_IB: | |
c5483388 | 2630 | ret = cma_modify_qp_err(id_priv); |
07ebafba TT |
2631 | if (ret) |
2632 | goto out; | |
e51060f0 SH |
2633 | /* Initiate or respond to a disconnect. */ |
2634 | if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0)) | |
2635 | ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0); | |
2636 | break; | |
07ebafba TT |
2637 | case RDMA_TRANSPORT_IWARP: |
2638 | ret = iw_cm_disconnect(id_priv->cm_id.iw, 0); | |
2639 | break; | |
e51060f0 | 2640 | default: |
07ebafba | 2641 | ret = -EINVAL; |
e51060f0 SH |
2642 | break; |
2643 | } | |
2644 | out: | |
2645 | return ret; | |
2646 | } | |
2647 | EXPORT_SYMBOL(rdma_disconnect); | |
2648 | ||
c8f6a362 SH |
2649 | static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast) |
2650 | { | |
2651 | struct rdma_id_private *id_priv; | |
2652 | struct cma_multicast *mc = multicast->context; | |
2653 | struct rdma_cm_event event; | |
2654 | int ret; | |
2655 | ||
2656 | id_priv = mc->id_priv; | |
de910bd9 OG |
2657 | if (cma_disable_callback(id_priv, CMA_ADDR_BOUND) && |
2658 | cma_disable_callback(id_priv, CMA_ADDR_RESOLVED)) | |
8aa08602 | 2659 | return 0; |
c8f6a362 | 2660 | |
c5483388 | 2661 | mutex_lock(&id_priv->qp_mutex); |
c8f6a362 SH |
2662 | if (!status && id_priv->id.qp) |
2663 | status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid, | |
2664 | multicast->rec.mlid); | |
c5483388 | 2665 | mutex_unlock(&id_priv->qp_mutex); |
c8f6a362 SH |
2666 | |
2667 | memset(&event, 0, sizeof event); | |
2668 | event.status = status; | |
2669 | event.param.ud.private_data = mc->context; | |
2670 | if (!status) { | |
2671 | event.event = RDMA_CM_EVENT_MULTICAST_JOIN; | |
2672 | ib_init_ah_from_mcmember(id_priv->id.device, | |
2673 | id_priv->id.port_num, &multicast->rec, | |
2674 | &event.param.ud.ah_attr); | |
2675 | event.param.ud.qp_num = 0xFFFFFF; | |
2676 | event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey); | |
2677 | } else | |
2678 | event.event = RDMA_CM_EVENT_MULTICAST_ERROR; | |
2679 | ||
2680 | ret = id_priv->id.event_handler(&id_priv->id, &event); | |
2681 | if (ret) { | |
2682 | cma_exch(id_priv, CMA_DESTROYING); | |
de910bd9 | 2683 | mutex_unlock(&id_priv->handler_mutex); |
c8f6a362 SH |
2684 | rdma_destroy_id(&id_priv->id); |
2685 | return 0; | |
2686 | } | |
8aa08602 | 2687 | |
de910bd9 | 2688 | mutex_unlock(&id_priv->handler_mutex); |
c8f6a362 SH |
2689 | return 0; |
2690 | } | |
2691 | ||
2692 | static void cma_set_mgid(struct rdma_id_private *id_priv, | |
2693 | struct sockaddr *addr, union ib_gid *mgid) | |
2694 | { | |
2695 | unsigned char mc_map[MAX_ADDR_LEN]; | |
2696 | struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; | |
2697 | struct sockaddr_in *sin = (struct sockaddr_in *) addr; | |
2698 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr; | |
2699 | ||
2700 | if (cma_any_addr(addr)) { | |
2701 | memset(mgid, 0, sizeof *mgid); | |
2702 | } else if ((addr->sa_family == AF_INET6) && | |
1c9b2819 | 2703 | ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) == |
c8f6a362 SH |
2704 | 0xFF10A01B)) { |
2705 | /* IPv6 address is an SA assigned MGID. */ | |
2706 | memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); | |
e2e62697 JG |
2707 | } else if ((addr->sa_family == AF_INET6)) { |
2708 | ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map); | |
2709 | if (id_priv->id.ps == RDMA_PS_UDP) | |
2710 | mc_map[7] = 0x01; /* Use RDMA CM signature */ | |
2711 | *mgid = *(union ib_gid *) (mc_map + 4); | |
c8f6a362 | 2712 | } else { |
a9e527e3 | 2713 | ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map); |
c8f6a362 SH |
2714 | if (id_priv->id.ps == RDMA_PS_UDP) |
2715 | mc_map[7] = 0x01; /* Use RDMA CM signature */ | |
c8f6a362 SH |
2716 | *mgid = *(union ib_gid *) (mc_map + 4); |
2717 | } | |
2718 | } | |
2719 | ||
2720 | static int cma_join_ib_multicast(struct rdma_id_private *id_priv, | |
2721 | struct cma_multicast *mc) | |
2722 | { | |
2723 | struct ib_sa_mcmember_rec rec; | |
2724 | struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; | |
2725 | ib_sa_comp_mask comp_mask; | |
2726 | int ret; | |
2727 | ||
2728 | ib_addr_get_mgid(dev_addr, &rec.mgid); | |
2729 | ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num, | |
2730 | &rec.mgid, &rec); | |
2731 | if (ret) | |
2732 | return ret; | |
2733 | ||
3f446754 | 2734 | cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid); |
c8f6a362 SH |
2735 | if (id_priv->id.ps == RDMA_PS_UDP) |
2736 | rec.qkey = cpu_to_be32(RDMA_UDP_QKEY); | |
6f8372b6 | 2737 | rdma_addr_get_sgid(dev_addr, &rec.port_gid); |
c8f6a362 SH |
2738 | rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); |
2739 | rec.join_state = 1; | |
2740 | ||
2741 | comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID | | |
2742 | IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE | | |
2743 | IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL | | |
2744 | IB_SA_MCMEMBER_REC_FLOW_LABEL | | |
2745 | IB_SA_MCMEMBER_REC_TRAFFIC_CLASS; | |
2746 | ||
84adeee9 YE |
2747 | if (id_priv->id.ps == RDMA_PS_IPOIB) |
2748 | comp_mask |= IB_SA_MCMEMBER_REC_RATE | | |
2749 | IB_SA_MCMEMBER_REC_RATE_SELECTOR; | |
2750 | ||
c8f6a362 SH |
2751 | mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device, |
2752 | id_priv->id.port_num, &rec, | |
2753 | comp_mask, GFP_KERNEL, | |
2754 | cma_ib_mc_handler, mc); | |
2755 | if (IS_ERR(mc->multicast.ib)) | |
2756 | return PTR_ERR(mc->multicast.ib); | |
2757 | ||
2758 | return 0; | |
2759 | } | |
2760 | ||
2761 | int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr, | |
2762 | void *context) | |
2763 | { | |
2764 | struct rdma_id_private *id_priv; | |
2765 | struct cma_multicast *mc; | |
2766 | int ret; | |
2767 | ||
2768 | id_priv = container_of(id, struct rdma_id_private, id); | |
2769 | if (!cma_comp(id_priv, CMA_ADDR_BOUND) && | |
2770 | !cma_comp(id_priv, CMA_ADDR_RESOLVED)) | |
2771 | return -EINVAL; | |
2772 | ||
2773 | mc = kmalloc(sizeof *mc, GFP_KERNEL); | |
2774 | if (!mc) | |
2775 | return -ENOMEM; | |
2776 | ||
2777 | memcpy(&mc->addr, addr, ip_addr_size(addr)); | |
2778 | mc->context = context; | |
2779 | mc->id_priv = id_priv; | |
2780 | ||
2781 | spin_lock(&id_priv->lock); | |
2782 | list_add(&mc->list, &id_priv->mc_list); | |
2783 | spin_unlock(&id_priv->lock); | |
2784 | ||
2785 | switch (rdma_node_get_transport(id->device->node_type)) { | |
2786 | case RDMA_TRANSPORT_IB: | |
2787 | ret = cma_join_ib_multicast(id_priv, mc); | |
2788 | break; | |
2789 | default: | |
2790 | ret = -ENOSYS; | |
2791 | break; | |
2792 | } | |
2793 | ||
2794 | if (ret) { | |
2795 | spin_lock_irq(&id_priv->lock); | |
2796 | list_del(&mc->list); | |
2797 | spin_unlock_irq(&id_priv->lock); | |
2798 | kfree(mc); | |
2799 | } | |
2800 | return ret; | |
2801 | } | |
2802 | EXPORT_SYMBOL(rdma_join_multicast); | |
2803 | ||
2804 | void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr) | |
2805 | { | |
2806 | struct rdma_id_private *id_priv; | |
2807 | struct cma_multicast *mc; | |
2808 | ||
2809 | id_priv = container_of(id, struct rdma_id_private, id); | |
2810 | spin_lock_irq(&id_priv->lock); | |
2811 | list_for_each_entry(mc, &id_priv->mc_list, list) { | |
2812 | if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) { | |
2813 | list_del(&mc->list); | |
2814 | spin_unlock_irq(&id_priv->lock); | |
2815 | ||
2816 | if (id->qp) | |
2817 | ib_detach_mcast(id->qp, | |
2818 | &mc->multicast.ib->rec.mgid, | |
2819 | mc->multicast.ib->rec.mlid); | |
2820 | ib_sa_free_multicast(mc->multicast.ib); | |
2821 | kfree(mc); | |
2822 | return; | |
2823 | } | |
2824 | } | |
2825 | spin_unlock_irq(&id_priv->lock); | |
2826 | } | |
2827 | EXPORT_SYMBOL(rdma_leave_multicast); | |
2828 | ||
dd5bdff8 OG |
2829 | static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv) |
2830 | { | |
2831 | struct rdma_dev_addr *dev_addr; | |
2832 | struct cma_ndev_work *work; | |
2833 | ||
2834 | dev_addr = &id_priv->id.route.addr.dev_addr; | |
2835 | ||
6266ed6e | 2836 | if ((dev_addr->bound_dev_if == ndev->ifindex) && |
dd5bdff8 OG |
2837 | memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) { |
2838 | printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n", | |
2839 | ndev->name, &id_priv->id); | |
2840 | work = kzalloc(sizeof *work, GFP_KERNEL); | |
2841 | if (!work) | |
2842 | return -ENOMEM; | |
2843 | ||
2844 | INIT_WORK(&work->work, cma_ndev_work_handler); | |
2845 | work->id = id_priv; | |
2846 | work->event.event = RDMA_CM_EVENT_ADDR_CHANGE; | |
2847 | atomic_inc(&id_priv->refcount); | |
2848 | queue_work(cma_wq, &work->work); | |
2849 | } | |
2850 | ||
2851 | return 0; | |
2852 | } | |
2853 | ||
2854 | static int cma_netdev_callback(struct notifier_block *self, unsigned long event, | |
2855 | void *ctx) | |
2856 | { | |
2857 | struct net_device *ndev = (struct net_device *)ctx; | |
2858 | struct cma_device *cma_dev; | |
2859 | struct rdma_id_private *id_priv; | |
2860 | int ret = NOTIFY_DONE; | |
2861 | ||
2862 | if (dev_net(ndev) != &init_net) | |
2863 | return NOTIFY_DONE; | |
2864 | ||
2865 | if (event != NETDEV_BONDING_FAILOVER) | |
2866 | return NOTIFY_DONE; | |
2867 | ||
2868 | if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING)) | |
2869 | return NOTIFY_DONE; | |
2870 | ||
2871 | mutex_lock(&lock); | |
2872 | list_for_each_entry(cma_dev, &dev_list, list) | |
2873 | list_for_each_entry(id_priv, &cma_dev->id_list, list) { | |
2874 | ret = cma_netdev_change(ndev, id_priv); | |
2875 | if (ret) | |
2876 | goto out; | |
2877 | } | |
2878 | ||
2879 | out: | |
2880 | mutex_unlock(&lock); | |
2881 | return ret; | |
2882 | } | |
2883 | ||
2884 | static struct notifier_block cma_nb = { | |
2885 | .notifier_call = cma_netdev_callback | |
2886 | }; | |
2887 | ||
e51060f0 SH |
2888 | static void cma_add_one(struct ib_device *device) |
2889 | { | |
2890 | struct cma_device *cma_dev; | |
2891 | struct rdma_id_private *id_priv; | |
2892 | ||
2893 | cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL); | |
2894 | if (!cma_dev) | |
2895 | return; | |
2896 | ||
2897 | cma_dev->device = device; | |
e51060f0 SH |
2898 | |
2899 | init_completion(&cma_dev->comp); | |
2900 | atomic_set(&cma_dev->refcount, 1); | |
2901 | INIT_LIST_HEAD(&cma_dev->id_list); | |
2902 | ib_set_client_data(device, &cma_client, cma_dev); | |
2903 | ||
2904 | mutex_lock(&lock); | |
2905 | list_add_tail(&cma_dev->list, &dev_list); | |
2906 | list_for_each_entry(id_priv, &listen_any_list, list) | |
2907 | cma_listen_on_dev(id_priv, cma_dev); | |
2908 | mutex_unlock(&lock); | |
e51060f0 SH |
2909 | } |
2910 | ||
2911 | static int cma_remove_id_dev(struct rdma_id_private *id_priv) | |
2912 | { | |
a1b1b61f | 2913 | struct rdma_cm_event event; |
e51060f0 | 2914 | enum cma_state state; |
de910bd9 | 2915 | int ret = 0; |
e51060f0 SH |
2916 | |
2917 | /* Record that we want to remove the device */ | |
2918 | state = cma_exch(id_priv, CMA_DEVICE_REMOVAL); | |
2919 | if (state == CMA_DESTROYING) | |
2920 | return 0; | |
2921 | ||
2922 | cma_cancel_operation(id_priv, state); | |
de910bd9 | 2923 | mutex_lock(&id_priv->handler_mutex); |
e51060f0 SH |
2924 | |
2925 | /* Check for destruction from another callback. */ | |
2926 | if (!cma_comp(id_priv, CMA_DEVICE_REMOVAL)) | |
de910bd9 | 2927 | goto out; |
e51060f0 | 2928 | |
a1b1b61f SH |
2929 | memset(&event, 0, sizeof event); |
2930 | event.event = RDMA_CM_EVENT_DEVICE_REMOVAL; | |
de910bd9 OG |
2931 | ret = id_priv->id.event_handler(&id_priv->id, &event); |
2932 | out: | |
2933 | mutex_unlock(&id_priv->handler_mutex); | |
2934 | return ret; | |
e51060f0 SH |
2935 | } |
2936 | ||
2937 | static void cma_process_remove(struct cma_device *cma_dev) | |
2938 | { | |
e51060f0 SH |
2939 | struct rdma_id_private *id_priv; |
2940 | int ret; | |
2941 | ||
e51060f0 SH |
2942 | mutex_lock(&lock); |
2943 | while (!list_empty(&cma_dev->id_list)) { | |
2944 | id_priv = list_entry(cma_dev->id_list.next, | |
2945 | struct rdma_id_private, list); | |
2946 | ||
d02d1f53 | 2947 | list_del(&id_priv->listen_list); |
94de178a | 2948 | list_del_init(&id_priv->list); |
e51060f0 SH |
2949 | atomic_inc(&id_priv->refcount); |
2950 | mutex_unlock(&lock); | |
2951 | ||
d02d1f53 | 2952 | ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv); |
e51060f0 SH |
2953 | cma_deref_id(id_priv); |
2954 | if (ret) | |
2955 | rdma_destroy_id(&id_priv->id); | |
2956 | ||
2957 | mutex_lock(&lock); | |
2958 | } | |
2959 | mutex_unlock(&lock); | |
2960 | ||
2961 | cma_deref_dev(cma_dev); | |
2962 | wait_for_completion(&cma_dev->comp); | |
2963 | } | |
2964 | ||
2965 | static void cma_remove_one(struct ib_device *device) | |
2966 | { | |
2967 | struct cma_device *cma_dev; | |
2968 | ||
2969 | cma_dev = ib_get_client_data(device, &cma_client); | |
2970 | if (!cma_dev) | |
2971 | return; | |
2972 | ||
2973 | mutex_lock(&lock); | |
2974 | list_del(&cma_dev->list); | |
2975 | mutex_unlock(&lock); | |
2976 | ||
2977 | cma_process_remove(cma_dev); | |
2978 | kfree(cma_dev); | |
2979 | } | |
2980 | ||
716abb1f | 2981 | static int __init cma_init(void) |
e51060f0 | 2982 | { |
5d7220e8 | 2983 | int ret; |
227b60f5 | 2984 | |
c7f743a6 | 2985 | cma_wq = create_singlethread_workqueue("rdma_cm"); |
e51060f0 SH |
2986 | if (!cma_wq) |
2987 | return -ENOMEM; | |
2988 | ||
c1a0b23b | 2989 | ib_sa_register_client(&sa_client); |
7a118df3 | 2990 | rdma_addr_register_client(&addr_client); |
dd5bdff8 | 2991 | register_netdevice_notifier(&cma_nb); |
c1a0b23b | 2992 | |
e51060f0 SH |
2993 | ret = ib_register_client(&cma_client); |
2994 | if (ret) | |
2995 | goto err; | |
2996 | return 0; | |
2997 | ||
2998 | err: | |
dd5bdff8 | 2999 | unregister_netdevice_notifier(&cma_nb); |
7a118df3 | 3000 | rdma_addr_unregister_client(&addr_client); |
c1a0b23b | 3001 | ib_sa_unregister_client(&sa_client); |
e51060f0 SH |
3002 | destroy_workqueue(cma_wq); |
3003 | return ret; | |
3004 | } | |
3005 | ||
716abb1f | 3006 | static void __exit cma_cleanup(void) |
e51060f0 SH |
3007 | { |
3008 | ib_unregister_client(&cma_client); | |
dd5bdff8 | 3009 | unregister_netdevice_notifier(&cma_nb); |
7a118df3 | 3010 | rdma_addr_unregister_client(&addr_client); |
c1a0b23b | 3011 | ib_sa_unregister_client(&sa_client); |
e51060f0 SH |
3012 | destroy_workqueue(cma_wq); |
3013 | idr_destroy(&sdp_ps); | |
3014 | idr_destroy(&tcp_ps); | |
628e5f6d | 3015 | idr_destroy(&udp_ps); |
c8f6a362 | 3016 | idr_destroy(&ipoib_ps); |
e51060f0 SH |
3017 | } |
3018 | ||
3019 | module_init(cma_init); | |
3020 | module_exit(cma_cleanup); |