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75216638 SH |
1 | /* |
2 | * Copyright (c) 2005-2006 Intel Corporation. All rights reserved. | |
3 | * | |
4 | * This software is available to you under a choice of one of two | |
5 | * licenses. You may choose to be licensed under the terms of the GNU | |
6 | * General Public License (GPL) Version 2, available from the file | |
7 | * COPYING in the main directory of this source tree, or the | |
8 | * OpenIB.org BSD license below: | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or | |
11 | * without modification, are permitted provided that the following | |
12 | * conditions are met: | |
13 | * | |
14 | * - Redistributions of source code must retain the above | |
15 | * copyright notice, this list of conditions and the following | |
16 | * disclaimer. | |
17 | * | |
18 | * - Redistributions in binary form must reproduce the above | |
19 | * copyright notice, this list of conditions and the following | |
20 | * disclaimer in the documentation and/or other materials | |
21 | * provided with the distribution. | |
22 | * | |
23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
30 | * SOFTWARE. | |
31 | */ | |
32 | ||
33 | #include <linux/completion.h> | |
88314e4d | 34 | #include <linux/file.h> |
75216638 SH |
35 | #include <linux/mutex.h> |
36 | #include <linux/poll.h> | |
d43c36dc | 37 | #include <linux/sched.h> |
75216638 SH |
38 | #include <linux/idr.h> |
39 | #include <linux/in.h> | |
40 | #include <linux/in6.h> | |
41 | #include <linux/miscdevice.h> | |
5a0e3ad6 | 42 | #include <linux/slab.h> |
97cb7e40 | 43 | #include <linux/sysctl.h> |
e4dd23d7 | 44 | #include <linux/module.h> |
75216638 SH |
45 | |
46 | #include <rdma/rdma_user_cm.h> | |
47 | #include <rdma/ib_marshall.h> | |
48 | #include <rdma/rdma_cm.h> | |
a7ca1f00 | 49 | #include <rdma/rdma_cm_ib.h> |
ee7aed45 | 50 | #include <rdma/ib_addr.h> |
edaa7a55 | 51 | #include <rdma/ib.h> |
75216638 SH |
52 | |
53 | MODULE_AUTHOR("Sean Hefty"); | |
54 | MODULE_DESCRIPTION("RDMA Userspace Connection Manager Access"); | |
55 | MODULE_LICENSE("Dual BSD/GPL"); | |
56 | ||
97cb7e40 SW |
57 | static unsigned int max_backlog = 1024; |
58 | ||
59 | static struct ctl_table_header *ucma_ctl_table_hdr; | |
f3a5e3e3 | 60 | static struct ctl_table ucma_ctl_table[] = { |
97cb7e40 SW |
61 | { |
62 | .procname = "max_backlog", | |
63 | .data = &max_backlog, | |
64 | .maxlen = sizeof max_backlog, | |
65 | .mode = 0644, | |
66 | .proc_handler = proc_dointvec, | |
67 | }, | |
68 | { } | |
69 | }; | |
70 | ||
75216638 SH |
71 | struct ucma_file { |
72 | struct mutex mut; | |
73 | struct file *filp; | |
74 | struct list_head ctx_list; | |
75 | struct list_head event_list; | |
76 | wait_queue_head_t poll_wait; | |
77 | }; | |
78 | ||
79 | struct ucma_context { | |
80 | int id; | |
81 | struct completion comp; | |
82 | atomic_t ref; | |
83 | int events_reported; | |
84 | int backlog; | |
85 | ||
86 | struct ucma_file *file; | |
87 | struct rdma_cm_id *cm_id; | |
88 | u64 uid; | |
89 | ||
90 | struct list_head list; | |
c8f6a362 SH |
91 | struct list_head mc_list; |
92 | }; | |
93 | ||
94 | struct ucma_multicast { | |
95 | struct ucma_context *ctx; | |
96 | int id; | |
97 | int events_reported; | |
98 | ||
99 | u64 uid; | |
100 | struct list_head list; | |
3f446754 | 101 | struct sockaddr_storage addr; |
75216638 SH |
102 | }; |
103 | ||
104 | struct ucma_event { | |
105 | struct ucma_context *ctx; | |
c8f6a362 | 106 | struct ucma_multicast *mc; |
75216638 SH |
107 | struct list_head list; |
108 | struct rdma_cm_id *cm_id; | |
109 | struct rdma_ucm_event_resp resp; | |
110 | }; | |
111 | ||
112 | static DEFINE_MUTEX(mut); | |
113 | static DEFINE_IDR(ctx_idr); | |
c8f6a362 | 114 | static DEFINE_IDR(multicast_idr); |
75216638 SH |
115 | |
116 | static inline struct ucma_context *_ucma_find_context(int id, | |
117 | struct ucma_file *file) | |
118 | { | |
119 | struct ucma_context *ctx; | |
120 | ||
121 | ctx = idr_find(&ctx_idr, id); | |
122 | if (!ctx) | |
123 | ctx = ERR_PTR(-ENOENT); | |
124 | else if (ctx->file != file) | |
125 | ctx = ERR_PTR(-EINVAL); | |
126 | return ctx; | |
127 | } | |
128 | ||
129 | static struct ucma_context *ucma_get_ctx(struct ucma_file *file, int id) | |
130 | { | |
131 | struct ucma_context *ctx; | |
132 | ||
133 | mutex_lock(&mut); | |
134 | ctx = _ucma_find_context(id, file); | |
135 | if (!IS_ERR(ctx)) | |
136 | atomic_inc(&ctx->ref); | |
137 | mutex_unlock(&mut); | |
138 | return ctx; | |
139 | } | |
140 | ||
141 | static void ucma_put_ctx(struct ucma_context *ctx) | |
142 | { | |
143 | if (atomic_dec_and_test(&ctx->ref)) | |
144 | complete(&ctx->comp); | |
145 | } | |
146 | ||
147 | static struct ucma_context *ucma_alloc_ctx(struct ucma_file *file) | |
148 | { | |
149 | struct ucma_context *ctx; | |
75216638 SH |
150 | |
151 | ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); | |
152 | if (!ctx) | |
153 | return NULL; | |
154 | ||
155 | atomic_set(&ctx->ref, 1); | |
156 | init_completion(&ctx->comp); | |
c8f6a362 | 157 | INIT_LIST_HEAD(&ctx->mc_list); |
75216638 SH |
158 | ctx->file = file; |
159 | ||
3b069c5d TH |
160 | mutex_lock(&mut); |
161 | ctx->id = idr_alloc(&ctx_idr, ctx, 0, 0, GFP_KERNEL); | |
162 | mutex_unlock(&mut); | |
163 | if (ctx->id < 0) | |
75216638 SH |
164 | goto error; |
165 | ||
166 | list_add_tail(&ctx->list, &file->ctx_list); | |
167 | return ctx; | |
168 | ||
169 | error: | |
170 | kfree(ctx); | |
171 | return NULL; | |
172 | } | |
173 | ||
c8f6a362 SH |
174 | static struct ucma_multicast* ucma_alloc_multicast(struct ucma_context *ctx) |
175 | { | |
176 | struct ucma_multicast *mc; | |
c8f6a362 SH |
177 | |
178 | mc = kzalloc(sizeof(*mc), GFP_KERNEL); | |
179 | if (!mc) | |
180 | return NULL; | |
181 | ||
3b069c5d TH |
182 | mutex_lock(&mut); |
183 | mc->id = idr_alloc(&multicast_idr, mc, 0, 0, GFP_KERNEL); | |
184 | mutex_unlock(&mut); | |
185 | if (mc->id < 0) | |
c8f6a362 SH |
186 | goto error; |
187 | ||
188 | mc->ctx = ctx; | |
189 | list_add_tail(&mc->list, &ctx->mc_list); | |
190 | return mc; | |
191 | ||
192 | error: | |
193 | kfree(mc); | |
194 | return NULL; | |
195 | } | |
196 | ||
75216638 SH |
197 | static void ucma_copy_conn_event(struct rdma_ucm_conn_param *dst, |
198 | struct rdma_conn_param *src) | |
199 | { | |
200 | if (src->private_data_len) | |
201 | memcpy(dst->private_data, src->private_data, | |
202 | src->private_data_len); | |
203 | dst->private_data_len = src->private_data_len; | |
204 | dst->responder_resources =src->responder_resources; | |
205 | dst->initiator_depth = src->initiator_depth; | |
206 | dst->flow_control = src->flow_control; | |
207 | dst->retry_count = src->retry_count; | |
208 | dst->rnr_retry_count = src->rnr_retry_count; | |
209 | dst->srq = src->srq; | |
210 | dst->qp_num = src->qp_num; | |
211 | } | |
212 | ||
213 | static void ucma_copy_ud_event(struct rdma_ucm_ud_param *dst, | |
214 | struct rdma_ud_param *src) | |
215 | { | |
216 | if (src->private_data_len) | |
217 | memcpy(dst->private_data, src->private_data, | |
218 | src->private_data_len); | |
219 | dst->private_data_len = src->private_data_len; | |
220 | ib_copy_ah_attr_to_user(&dst->ah_attr, &src->ah_attr); | |
221 | dst->qp_num = src->qp_num; | |
222 | dst->qkey = src->qkey; | |
223 | } | |
224 | ||
225 | static void ucma_set_event_context(struct ucma_context *ctx, | |
226 | struct rdma_cm_event *event, | |
227 | struct ucma_event *uevent) | |
228 | { | |
229 | uevent->ctx = ctx; | |
c8f6a362 SH |
230 | switch (event->event) { |
231 | case RDMA_CM_EVENT_MULTICAST_JOIN: | |
232 | case RDMA_CM_EVENT_MULTICAST_ERROR: | |
233 | uevent->mc = (struct ucma_multicast *) | |
234 | event->param.ud.private_data; | |
235 | uevent->resp.uid = uevent->mc->uid; | |
236 | uevent->resp.id = uevent->mc->id; | |
237 | break; | |
238 | default: | |
239 | uevent->resp.uid = ctx->uid; | |
240 | uevent->resp.id = ctx->id; | |
241 | break; | |
242 | } | |
75216638 SH |
243 | } |
244 | ||
245 | static int ucma_event_handler(struct rdma_cm_id *cm_id, | |
246 | struct rdma_cm_event *event) | |
247 | { | |
248 | struct ucma_event *uevent; | |
249 | struct ucma_context *ctx = cm_id->context; | |
250 | int ret = 0; | |
251 | ||
252 | uevent = kzalloc(sizeof(*uevent), GFP_KERNEL); | |
253 | if (!uevent) | |
254 | return event->event == RDMA_CM_EVENT_CONNECT_REQUEST; | |
255 | ||
418edaab | 256 | mutex_lock(&ctx->file->mut); |
75216638 SH |
257 | uevent->cm_id = cm_id; |
258 | ucma_set_event_context(ctx, event, uevent); | |
259 | uevent->resp.event = event->event; | |
260 | uevent->resp.status = event->status; | |
638ef7a6 | 261 | if (cm_id->qp_type == IB_QPT_UD) |
75216638 SH |
262 | ucma_copy_ud_event(&uevent->resp.param.ud, &event->param.ud); |
263 | else | |
264 | ucma_copy_conn_event(&uevent->resp.param.conn, | |
265 | &event->param.conn); | |
266 | ||
75216638 SH |
267 | if (event->event == RDMA_CM_EVENT_CONNECT_REQUEST) { |
268 | if (!ctx->backlog) { | |
3492856e | 269 | ret = -ENOMEM; |
30a5ec98 | 270 | kfree(uevent); |
75216638 SH |
271 | goto out; |
272 | } | |
273 | ctx->backlog--; | |
c6b21824 | 274 | } else if (!ctx->uid || ctx->cm_id != cm_id) { |
0cefcf0b SH |
275 | /* |
276 | * We ignore events for new connections until userspace has set | |
277 | * their context. This can only happen if an error occurs on a | |
278 | * new connection before the user accepts it. This is okay, | |
279 | * since the accept will just fail later. | |
280 | */ | |
281 | kfree(uevent); | |
282 | goto out; | |
75216638 | 283 | } |
0cefcf0b | 284 | |
75216638 SH |
285 | list_add_tail(&uevent->list, &ctx->file->event_list); |
286 | wake_up_interruptible(&ctx->file->poll_wait); | |
287 | out: | |
288 | mutex_unlock(&ctx->file->mut); | |
289 | return ret; | |
290 | } | |
291 | ||
292 | static ssize_t ucma_get_event(struct ucma_file *file, const char __user *inbuf, | |
293 | int in_len, int out_len) | |
294 | { | |
295 | struct ucma_context *ctx; | |
296 | struct rdma_ucm_get_event cmd; | |
297 | struct ucma_event *uevent; | |
298 | int ret = 0; | |
75216638 SH |
299 | |
300 | if (out_len < sizeof uevent->resp) | |
301 | return -ENOSPC; | |
302 | ||
303 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
304 | return -EFAULT; | |
305 | ||
306 | mutex_lock(&file->mut); | |
307 | while (list_empty(&file->event_list)) { | |
d92f7644 | 308 | mutex_unlock(&file->mut); |
75216638 | 309 | |
d92f7644 SH |
310 | if (file->filp->f_flags & O_NONBLOCK) |
311 | return -EAGAIN; | |
312 | ||
313 | if (wait_event_interruptible(file->poll_wait, | |
314 | !list_empty(&file->event_list))) | |
315 | return -ERESTARTSYS; | |
75216638 | 316 | |
75216638 | 317 | mutex_lock(&file->mut); |
75216638 SH |
318 | } |
319 | ||
75216638 SH |
320 | uevent = list_entry(file->event_list.next, struct ucma_event, list); |
321 | ||
322 | if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) { | |
323 | ctx = ucma_alloc_ctx(file); | |
324 | if (!ctx) { | |
325 | ret = -ENOMEM; | |
326 | goto done; | |
327 | } | |
328 | uevent->ctx->backlog++; | |
329 | ctx->cm_id = uevent->cm_id; | |
330 | ctx->cm_id->context = ctx; | |
331 | uevent->resp.id = ctx->id; | |
332 | } | |
333 | ||
334 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
335 | &uevent->resp, sizeof uevent->resp)) { | |
336 | ret = -EFAULT; | |
337 | goto done; | |
338 | } | |
339 | ||
340 | list_del(&uevent->list); | |
341 | uevent->ctx->events_reported++; | |
c8f6a362 SH |
342 | if (uevent->mc) |
343 | uevent->mc->events_reported++; | |
75216638 SH |
344 | kfree(uevent); |
345 | done: | |
346 | mutex_unlock(&file->mut); | |
347 | return ret; | |
348 | } | |
349 | ||
b26f9b99 SH |
350 | static int ucma_get_qp_type(struct rdma_ucm_create_id *cmd, enum ib_qp_type *qp_type) |
351 | { | |
352 | switch (cmd->ps) { | |
353 | case RDMA_PS_TCP: | |
354 | *qp_type = IB_QPT_RC; | |
355 | return 0; | |
356 | case RDMA_PS_UDP: | |
357 | case RDMA_PS_IPOIB: | |
358 | *qp_type = IB_QPT_UD; | |
359 | return 0; | |
638ef7a6 SH |
360 | case RDMA_PS_IB: |
361 | *qp_type = cmd->qp_type; | |
362 | return 0; | |
b26f9b99 SH |
363 | default: |
364 | return -EINVAL; | |
365 | } | |
366 | } | |
367 | ||
368 | static ssize_t ucma_create_id(struct ucma_file *file, const char __user *inbuf, | |
369 | int in_len, int out_len) | |
75216638 SH |
370 | { |
371 | struct rdma_ucm_create_id cmd; | |
372 | struct rdma_ucm_create_id_resp resp; | |
373 | struct ucma_context *ctx; | |
b26f9b99 | 374 | enum ib_qp_type qp_type; |
75216638 SH |
375 | int ret; |
376 | ||
377 | if (out_len < sizeof(resp)) | |
378 | return -ENOSPC; | |
379 | ||
380 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
381 | return -EFAULT; | |
382 | ||
b26f9b99 SH |
383 | ret = ucma_get_qp_type(&cmd, &qp_type); |
384 | if (ret) | |
385 | return ret; | |
386 | ||
75216638 SH |
387 | mutex_lock(&file->mut); |
388 | ctx = ucma_alloc_ctx(file); | |
389 | mutex_unlock(&file->mut); | |
390 | if (!ctx) | |
391 | return -ENOMEM; | |
392 | ||
393 | ctx->uid = cmd.uid; | |
b26f9b99 | 394 | ctx->cm_id = rdma_create_id(ucma_event_handler, ctx, cmd.ps, qp_type); |
75216638 SH |
395 | if (IS_ERR(ctx->cm_id)) { |
396 | ret = PTR_ERR(ctx->cm_id); | |
397 | goto err1; | |
398 | } | |
399 | ||
400 | resp.id = ctx->id; | |
401 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
402 | &resp, sizeof(resp))) { | |
403 | ret = -EFAULT; | |
404 | goto err2; | |
405 | } | |
406 | return 0; | |
407 | ||
408 | err2: | |
409 | rdma_destroy_id(ctx->cm_id); | |
410 | err1: | |
411 | mutex_lock(&mut); | |
412 | idr_remove(&ctx_idr, ctx->id); | |
413 | mutex_unlock(&mut); | |
414 | kfree(ctx); | |
415 | return ret; | |
416 | } | |
417 | ||
c8f6a362 SH |
418 | static void ucma_cleanup_multicast(struct ucma_context *ctx) |
419 | { | |
420 | struct ucma_multicast *mc, *tmp; | |
421 | ||
422 | mutex_lock(&mut); | |
423 | list_for_each_entry_safe(mc, tmp, &ctx->mc_list, list) { | |
424 | list_del(&mc->list); | |
425 | idr_remove(&multicast_idr, mc->id); | |
426 | kfree(mc); | |
427 | } | |
428 | mutex_unlock(&mut); | |
429 | } | |
430 | ||
c8f6a362 SH |
431 | static void ucma_cleanup_mc_events(struct ucma_multicast *mc) |
432 | { | |
433 | struct ucma_event *uevent, *tmp; | |
434 | ||
435 | list_for_each_entry_safe(uevent, tmp, &mc->ctx->file->event_list, list) { | |
436 | if (uevent->mc != mc) | |
437 | continue; | |
438 | ||
439 | list_del(&uevent->list); | |
440 | kfree(uevent); | |
441 | } | |
442 | } | |
443 | ||
186834b5 HS |
444 | /* |
445 | * We cannot hold file->mut when calling rdma_destroy_id() or we can | |
446 | * deadlock. We also acquire file->mut in ucma_event_handler(), and | |
447 | * rdma_destroy_id() will wait until all callbacks have completed. | |
448 | */ | |
75216638 SH |
449 | static int ucma_free_ctx(struct ucma_context *ctx) |
450 | { | |
451 | int events_reported; | |
186834b5 HS |
452 | struct ucma_event *uevent, *tmp; |
453 | LIST_HEAD(list); | |
75216638 SH |
454 | |
455 | /* No new events will be generated after destroying the id. */ | |
456 | rdma_destroy_id(ctx->cm_id); | |
457 | ||
c8f6a362 SH |
458 | ucma_cleanup_multicast(ctx); |
459 | ||
75216638 SH |
460 | /* Cleanup events not yet reported to the user. */ |
461 | mutex_lock(&ctx->file->mut); | |
186834b5 HS |
462 | list_for_each_entry_safe(uevent, tmp, &ctx->file->event_list, list) { |
463 | if (uevent->ctx == ctx) | |
464 | list_move_tail(&uevent->list, &list); | |
465 | } | |
75216638 SH |
466 | list_del(&ctx->list); |
467 | mutex_unlock(&ctx->file->mut); | |
468 | ||
186834b5 HS |
469 | list_for_each_entry_safe(uevent, tmp, &list, list) { |
470 | list_del(&uevent->list); | |
471 | if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) | |
472 | rdma_destroy_id(uevent->cm_id); | |
473 | kfree(uevent); | |
474 | } | |
475 | ||
75216638 SH |
476 | events_reported = ctx->events_reported; |
477 | kfree(ctx); | |
478 | return events_reported; | |
479 | } | |
480 | ||
481 | static ssize_t ucma_destroy_id(struct ucma_file *file, const char __user *inbuf, | |
482 | int in_len, int out_len) | |
483 | { | |
484 | struct rdma_ucm_destroy_id cmd; | |
485 | struct rdma_ucm_destroy_id_resp resp; | |
486 | struct ucma_context *ctx; | |
487 | int ret = 0; | |
488 | ||
489 | if (out_len < sizeof(resp)) | |
490 | return -ENOSPC; | |
491 | ||
492 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
493 | return -EFAULT; | |
494 | ||
495 | mutex_lock(&mut); | |
496 | ctx = _ucma_find_context(cmd.id, file); | |
497 | if (!IS_ERR(ctx)) | |
498 | idr_remove(&ctx_idr, ctx->id); | |
499 | mutex_unlock(&mut); | |
500 | ||
501 | if (IS_ERR(ctx)) | |
502 | return PTR_ERR(ctx); | |
503 | ||
504 | ucma_put_ctx(ctx); | |
505 | wait_for_completion(&ctx->comp); | |
506 | resp.events_reported = ucma_free_ctx(ctx); | |
507 | ||
508 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
509 | &resp, sizeof(resp))) | |
510 | ret = -EFAULT; | |
511 | ||
512 | return ret; | |
513 | } | |
514 | ||
05ad9457 | 515 | static ssize_t ucma_bind_ip(struct ucma_file *file, const char __user *inbuf, |
75216638 SH |
516 | int in_len, int out_len) |
517 | { | |
05ad9457 | 518 | struct rdma_ucm_bind_ip cmd; |
75216638 SH |
519 | struct ucma_context *ctx; |
520 | int ret; | |
521 | ||
522 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
523 | return -EFAULT; | |
524 | ||
525 | ctx = ucma_get_ctx(file, cmd.id); | |
526 | if (IS_ERR(ctx)) | |
527 | return PTR_ERR(ctx); | |
528 | ||
529 | ret = rdma_bind_addr(ctx->cm_id, (struct sockaddr *) &cmd.addr); | |
530 | ucma_put_ctx(ctx); | |
531 | return ret; | |
532 | } | |
533 | ||
eebe4c3a SH |
534 | static ssize_t ucma_bind(struct ucma_file *file, const char __user *inbuf, |
535 | int in_len, int out_len) | |
536 | { | |
537 | struct rdma_ucm_bind cmd; | |
538 | struct sockaddr *addr; | |
539 | struct ucma_context *ctx; | |
540 | int ret; | |
541 | ||
542 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
543 | return -EFAULT; | |
544 | ||
545 | addr = (struct sockaddr *) &cmd.addr; | |
546 | if (cmd.reserved || !cmd.addr_size || (cmd.addr_size != rdma_addr_size(addr))) | |
547 | return -EINVAL; | |
548 | ||
549 | ctx = ucma_get_ctx(file, cmd.id); | |
550 | if (IS_ERR(ctx)) | |
551 | return PTR_ERR(ctx); | |
552 | ||
553 | ret = rdma_bind_addr(ctx->cm_id, addr); | |
554 | ucma_put_ctx(ctx); | |
555 | return ret; | |
556 | } | |
557 | ||
05ad9457 SH |
558 | static ssize_t ucma_resolve_ip(struct ucma_file *file, |
559 | const char __user *inbuf, | |
560 | int in_len, int out_len) | |
75216638 | 561 | { |
05ad9457 | 562 | struct rdma_ucm_resolve_ip cmd; |
75216638 SH |
563 | struct ucma_context *ctx; |
564 | int ret; | |
565 | ||
566 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
567 | return -EFAULT; | |
568 | ||
569 | ctx = ucma_get_ctx(file, cmd.id); | |
570 | if (IS_ERR(ctx)) | |
571 | return PTR_ERR(ctx); | |
572 | ||
573 | ret = rdma_resolve_addr(ctx->cm_id, (struct sockaddr *) &cmd.src_addr, | |
574 | (struct sockaddr *) &cmd.dst_addr, | |
575 | cmd.timeout_ms); | |
576 | ucma_put_ctx(ctx); | |
577 | return ret; | |
578 | } | |
579 | ||
209cf2a7 SH |
580 | static ssize_t ucma_resolve_addr(struct ucma_file *file, |
581 | const char __user *inbuf, | |
582 | int in_len, int out_len) | |
583 | { | |
584 | struct rdma_ucm_resolve_addr cmd; | |
585 | struct sockaddr *src, *dst; | |
586 | struct ucma_context *ctx; | |
587 | int ret; | |
588 | ||
589 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
590 | return -EFAULT; | |
591 | ||
592 | src = (struct sockaddr *) &cmd.src_addr; | |
593 | dst = (struct sockaddr *) &cmd.dst_addr; | |
594 | if (cmd.reserved || (cmd.src_size && (cmd.src_size != rdma_addr_size(src))) || | |
595 | !cmd.dst_size || (cmd.dst_size != rdma_addr_size(dst))) | |
596 | return -EINVAL; | |
597 | ||
598 | ctx = ucma_get_ctx(file, cmd.id); | |
599 | if (IS_ERR(ctx)) | |
600 | return PTR_ERR(ctx); | |
601 | ||
602 | ret = rdma_resolve_addr(ctx->cm_id, src, dst, cmd.timeout_ms); | |
603 | ucma_put_ctx(ctx); | |
604 | return ret; | |
605 | } | |
606 | ||
75216638 SH |
607 | static ssize_t ucma_resolve_route(struct ucma_file *file, |
608 | const char __user *inbuf, | |
609 | int in_len, int out_len) | |
610 | { | |
611 | struct rdma_ucm_resolve_route cmd; | |
612 | struct ucma_context *ctx; | |
613 | int ret; | |
614 | ||
615 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
616 | return -EFAULT; | |
617 | ||
618 | ctx = ucma_get_ctx(file, cmd.id); | |
619 | if (IS_ERR(ctx)) | |
620 | return PTR_ERR(ctx); | |
621 | ||
622 | ret = rdma_resolve_route(ctx->cm_id, cmd.timeout_ms); | |
623 | ucma_put_ctx(ctx); | |
624 | return ret; | |
625 | } | |
626 | ||
627 | static void ucma_copy_ib_route(struct rdma_ucm_query_route_resp *resp, | |
628 | struct rdma_route *route) | |
629 | { | |
630 | struct rdma_dev_addr *dev_addr; | |
631 | ||
632 | resp->num_paths = route->num_paths; | |
633 | switch (route->num_paths) { | |
634 | case 0: | |
635 | dev_addr = &route->addr.dev_addr; | |
6f8372b6 SH |
636 | rdma_addr_get_dgid(dev_addr, |
637 | (union ib_gid *) &resp->ib_route[0].dgid); | |
638 | rdma_addr_get_sgid(dev_addr, | |
639 | (union ib_gid *) &resp->ib_route[0].sgid); | |
75216638 SH |
640 | resp->ib_route[0].pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); |
641 | break; | |
642 | case 2: | |
643 | ib_copy_path_rec_to_user(&resp->ib_route[1], | |
644 | &route->path_rec[1]); | |
645 | /* fall through */ | |
646 | case 1: | |
647 | ib_copy_path_rec_to_user(&resp->ib_route[0], | |
648 | &route->path_rec[0]); | |
649 | break; | |
650 | default: | |
651 | break; | |
652 | } | |
653 | } | |
654 | ||
3c86aa70 EC |
655 | static void ucma_copy_iboe_route(struct rdma_ucm_query_route_resp *resp, |
656 | struct rdma_route *route) | |
657 | { | |
3c86aa70 EC |
658 | |
659 | resp->num_paths = route->num_paths; | |
660 | switch (route->num_paths) { | |
661 | case 0: | |
7b85627b MS |
662 | rdma_ip2gid((struct sockaddr *)&route->addr.dst_addr, |
663 | (union ib_gid *)&resp->ib_route[0].dgid); | |
664 | rdma_ip2gid((struct sockaddr *)&route->addr.src_addr, | |
665 | (union ib_gid *)&resp->ib_route[0].sgid); | |
3c86aa70 EC |
666 | resp->ib_route[0].pkey = cpu_to_be16(0xffff); |
667 | break; | |
668 | case 2: | |
669 | ib_copy_path_rec_to_user(&resp->ib_route[1], | |
670 | &route->path_rec[1]); | |
671 | /* fall through */ | |
672 | case 1: | |
673 | ib_copy_path_rec_to_user(&resp->ib_route[0], | |
674 | &route->path_rec[0]); | |
675 | break; | |
676 | default: | |
677 | break; | |
678 | } | |
679 | } | |
680 | ||
e86f8b06 SW |
681 | static void ucma_copy_iw_route(struct rdma_ucm_query_route_resp *resp, |
682 | struct rdma_route *route) | |
683 | { | |
684 | struct rdma_dev_addr *dev_addr; | |
685 | ||
686 | dev_addr = &route->addr.dev_addr; | |
687 | rdma_addr_get_dgid(dev_addr, (union ib_gid *) &resp->ib_route[0].dgid); | |
688 | rdma_addr_get_sgid(dev_addr, (union ib_gid *) &resp->ib_route[0].sgid); | |
689 | } | |
690 | ||
75216638 SH |
691 | static ssize_t ucma_query_route(struct ucma_file *file, |
692 | const char __user *inbuf, | |
693 | int in_len, int out_len) | |
694 | { | |
ee7aed45 | 695 | struct rdma_ucm_query cmd; |
75216638 SH |
696 | struct rdma_ucm_query_route_resp resp; |
697 | struct ucma_context *ctx; | |
698 | struct sockaddr *addr; | |
699 | int ret = 0; | |
700 | ||
701 | if (out_len < sizeof(resp)) | |
702 | return -ENOSPC; | |
703 | ||
704 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
705 | return -EFAULT; | |
706 | ||
707 | ctx = ucma_get_ctx(file, cmd.id); | |
708 | if (IS_ERR(ctx)) | |
709 | return PTR_ERR(ctx); | |
710 | ||
711 | memset(&resp, 0, sizeof resp); | |
3f446754 | 712 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.src_addr; |
75216638 SH |
713 | memcpy(&resp.src_addr, addr, addr->sa_family == AF_INET ? |
714 | sizeof(struct sockaddr_in) : | |
715 | sizeof(struct sockaddr_in6)); | |
3f446754 | 716 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.dst_addr; |
75216638 SH |
717 | memcpy(&resp.dst_addr, addr, addr->sa_family == AF_INET ? |
718 | sizeof(struct sockaddr_in) : | |
719 | sizeof(struct sockaddr_in6)); | |
720 | if (!ctx->cm_id->device) | |
721 | goto out; | |
722 | ||
9cda779c | 723 | resp.node_guid = (__force __u64) ctx->cm_id->device->node_guid; |
75216638 | 724 | resp.port_num = ctx->cm_id->port_num; |
e86f8b06 SW |
725 | switch (rdma_node_get_transport(ctx->cm_id->device->node_type)) { |
726 | case RDMA_TRANSPORT_IB: | |
727 | switch (rdma_port_get_link_layer(ctx->cm_id->device, | |
728 | ctx->cm_id->port_num)) { | |
3c86aa70 EC |
729 | case IB_LINK_LAYER_INFINIBAND: |
730 | ucma_copy_ib_route(&resp, &ctx->cm_id->route); | |
731 | break; | |
732 | case IB_LINK_LAYER_ETHERNET: | |
733 | ucma_copy_iboe_route(&resp, &ctx->cm_id->route); | |
734 | break; | |
735 | default: | |
736 | break; | |
737 | } | |
e86f8b06 SW |
738 | break; |
739 | case RDMA_TRANSPORT_IWARP: | |
740 | ucma_copy_iw_route(&resp, &ctx->cm_id->route); | |
741 | break; | |
742 | default: | |
743 | break; | |
75216638 SH |
744 | } |
745 | ||
746 | out: | |
747 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
748 | &resp, sizeof(resp))) | |
749 | ret = -EFAULT; | |
750 | ||
751 | ucma_put_ctx(ctx); | |
752 | return ret; | |
753 | } | |
754 | ||
ee7aed45 SH |
755 | static void ucma_query_device_addr(struct rdma_cm_id *cm_id, |
756 | struct rdma_ucm_query_addr_resp *resp) | |
757 | { | |
758 | if (!cm_id->device) | |
759 | return; | |
760 | ||
761 | resp->node_guid = (__force __u64) cm_id->device->node_guid; | |
762 | resp->port_num = cm_id->port_num; | |
763 | resp->pkey = (__force __u16) cpu_to_be16( | |
764 | ib_addr_get_pkey(&cm_id->route.addr.dev_addr)); | |
765 | } | |
766 | ||
767 | static ssize_t ucma_query_addr(struct ucma_context *ctx, | |
768 | void __user *response, int out_len) | |
769 | { | |
770 | struct rdma_ucm_query_addr_resp resp; | |
771 | struct sockaddr *addr; | |
772 | int ret = 0; | |
773 | ||
774 | if (out_len < sizeof(resp)) | |
775 | return -ENOSPC; | |
776 | ||
777 | memset(&resp, 0, sizeof resp); | |
778 | ||
779 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.src_addr; | |
780 | resp.src_size = rdma_addr_size(addr); | |
781 | memcpy(&resp.src_addr, addr, resp.src_size); | |
782 | ||
783 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.dst_addr; | |
784 | resp.dst_size = rdma_addr_size(addr); | |
785 | memcpy(&resp.dst_addr, addr, resp.dst_size); | |
786 | ||
787 | ucma_query_device_addr(ctx->cm_id, &resp); | |
788 | ||
789 | if (copy_to_user(response, &resp, sizeof(resp))) | |
790 | ret = -EFAULT; | |
791 | ||
792 | return ret; | |
793 | } | |
794 | ||
ac53b264 SH |
795 | static ssize_t ucma_query_path(struct ucma_context *ctx, |
796 | void __user *response, int out_len) | |
797 | { | |
798 | struct rdma_ucm_query_path_resp *resp; | |
799 | int i, ret = 0; | |
800 | ||
801 | if (out_len < sizeof(*resp)) | |
802 | return -ENOSPC; | |
803 | ||
804 | resp = kzalloc(out_len, GFP_KERNEL); | |
805 | if (!resp) | |
806 | return -ENOMEM; | |
807 | ||
808 | resp->num_paths = ctx->cm_id->route.num_paths; | |
809 | for (i = 0, out_len -= sizeof(*resp); | |
810 | i < resp->num_paths && out_len > sizeof(struct ib_path_rec_data); | |
811 | i++, out_len -= sizeof(struct ib_path_rec_data)) { | |
812 | ||
813 | resp->path_data[i].flags = IB_PATH_GMP | IB_PATH_PRIMARY | | |
814 | IB_PATH_BIDIRECTIONAL; | |
815 | ib_sa_pack_path(&ctx->cm_id->route.path_rec[i], | |
816 | &resp->path_data[i].path_rec); | |
817 | } | |
818 | ||
819 | if (copy_to_user(response, resp, | |
820 | sizeof(*resp) + (i * sizeof(struct ib_path_rec_data)))) | |
821 | ret = -EFAULT; | |
822 | ||
823 | kfree(resp); | |
824 | return ret; | |
825 | } | |
826 | ||
edaa7a55 SH |
827 | static ssize_t ucma_query_gid(struct ucma_context *ctx, |
828 | void __user *response, int out_len) | |
829 | { | |
830 | struct rdma_ucm_query_addr_resp resp; | |
831 | struct sockaddr_ib *addr; | |
832 | int ret = 0; | |
833 | ||
834 | if (out_len < sizeof(resp)) | |
835 | return -ENOSPC; | |
836 | ||
837 | memset(&resp, 0, sizeof resp); | |
838 | ||
839 | ucma_query_device_addr(ctx->cm_id, &resp); | |
840 | ||
841 | addr = (struct sockaddr_ib *) &resp.src_addr; | |
842 | resp.src_size = sizeof(*addr); | |
843 | if (ctx->cm_id->route.addr.src_addr.ss_family == AF_IB) { | |
844 | memcpy(addr, &ctx->cm_id->route.addr.src_addr, resp.src_size); | |
845 | } else { | |
846 | addr->sib_family = AF_IB; | |
847 | addr->sib_pkey = (__force __be16) resp.pkey; | |
848 | rdma_addr_get_sgid(&ctx->cm_id->route.addr.dev_addr, | |
849 | (union ib_gid *) &addr->sib_addr); | |
850 | addr->sib_sid = rdma_get_service_id(ctx->cm_id, (struct sockaddr *) | |
851 | &ctx->cm_id->route.addr.src_addr); | |
852 | } | |
853 | ||
854 | addr = (struct sockaddr_ib *) &resp.dst_addr; | |
855 | resp.dst_size = sizeof(*addr); | |
856 | if (ctx->cm_id->route.addr.dst_addr.ss_family == AF_IB) { | |
857 | memcpy(addr, &ctx->cm_id->route.addr.dst_addr, resp.dst_size); | |
858 | } else { | |
859 | addr->sib_family = AF_IB; | |
860 | addr->sib_pkey = (__force __be16) resp.pkey; | |
861 | rdma_addr_get_dgid(&ctx->cm_id->route.addr.dev_addr, | |
862 | (union ib_gid *) &addr->sib_addr); | |
863 | addr->sib_sid = rdma_get_service_id(ctx->cm_id, (struct sockaddr *) | |
864 | &ctx->cm_id->route.addr.dst_addr); | |
865 | } | |
866 | ||
867 | if (copy_to_user(response, &resp, sizeof(resp))) | |
868 | ret = -EFAULT; | |
869 | ||
870 | return ret; | |
871 | } | |
872 | ||
ee7aed45 SH |
873 | static ssize_t ucma_query(struct ucma_file *file, |
874 | const char __user *inbuf, | |
875 | int in_len, int out_len) | |
876 | { | |
877 | struct rdma_ucm_query cmd; | |
878 | struct ucma_context *ctx; | |
879 | void __user *response; | |
880 | int ret; | |
881 | ||
882 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
883 | return -EFAULT; | |
884 | ||
885 | response = (void __user *)(unsigned long) cmd.response; | |
886 | ctx = ucma_get_ctx(file, cmd.id); | |
887 | if (IS_ERR(ctx)) | |
888 | return PTR_ERR(ctx); | |
889 | ||
890 | switch (cmd.option) { | |
891 | case RDMA_USER_CM_QUERY_ADDR: | |
892 | ret = ucma_query_addr(ctx, response, out_len); | |
893 | break; | |
ac53b264 SH |
894 | case RDMA_USER_CM_QUERY_PATH: |
895 | ret = ucma_query_path(ctx, response, out_len); | |
896 | break; | |
edaa7a55 SH |
897 | case RDMA_USER_CM_QUERY_GID: |
898 | ret = ucma_query_gid(ctx, response, out_len); | |
899 | break; | |
ee7aed45 SH |
900 | default: |
901 | ret = -ENOSYS; | |
902 | break; | |
903 | } | |
904 | ||
905 | ucma_put_ctx(ctx); | |
906 | return ret; | |
907 | } | |
908 | ||
5c438135 SH |
909 | static void ucma_copy_conn_param(struct rdma_cm_id *id, |
910 | struct rdma_conn_param *dst, | |
75216638 SH |
911 | struct rdma_ucm_conn_param *src) |
912 | { | |
913 | dst->private_data = src->private_data; | |
914 | dst->private_data_len = src->private_data_len; | |
915 | dst->responder_resources =src->responder_resources; | |
916 | dst->initiator_depth = src->initiator_depth; | |
917 | dst->flow_control = src->flow_control; | |
918 | dst->retry_count = src->retry_count; | |
919 | dst->rnr_retry_count = src->rnr_retry_count; | |
920 | dst->srq = src->srq; | |
921 | dst->qp_num = src->qp_num; | |
5c438135 | 922 | dst->qkey = (id->route.addr.src_addr.ss_family == AF_IB) ? src->qkey : 0; |
75216638 SH |
923 | } |
924 | ||
925 | static ssize_t ucma_connect(struct ucma_file *file, const char __user *inbuf, | |
926 | int in_len, int out_len) | |
927 | { | |
928 | struct rdma_ucm_connect cmd; | |
929 | struct rdma_conn_param conn_param; | |
930 | struct ucma_context *ctx; | |
931 | int ret; | |
932 | ||
933 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
934 | return -EFAULT; | |
935 | ||
936 | if (!cmd.conn_param.valid) | |
937 | return -EINVAL; | |
938 | ||
939 | ctx = ucma_get_ctx(file, cmd.id); | |
940 | if (IS_ERR(ctx)) | |
941 | return PTR_ERR(ctx); | |
942 | ||
5c438135 | 943 | ucma_copy_conn_param(ctx->cm_id, &conn_param, &cmd.conn_param); |
75216638 SH |
944 | ret = rdma_connect(ctx->cm_id, &conn_param); |
945 | ucma_put_ctx(ctx); | |
946 | return ret; | |
947 | } | |
948 | ||
949 | static ssize_t ucma_listen(struct ucma_file *file, const char __user *inbuf, | |
950 | int in_len, int out_len) | |
951 | { | |
952 | struct rdma_ucm_listen cmd; | |
953 | struct ucma_context *ctx; | |
954 | int ret; | |
955 | ||
956 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
957 | return -EFAULT; | |
958 | ||
959 | ctx = ucma_get_ctx(file, cmd.id); | |
960 | if (IS_ERR(ctx)) | |
961 | return PTR_ERR(ctx); | |
962 | ||
97cb7e40 SW |
963 | ctx->backlog = cmd.backlog > 0 && cmd.backlog < max_backlog ? |
964 | cmd.backlog : max_backlog; | |
75216638 SH |
965 | ret = rdma_listen(ctx->cm_id, ctx->backlog); |
966 | ucma_put_ctx(ctx); | |
967 | return ret; | |
968 | } | |
969 | ||
970 | static ssize_t ucma_accept(struct ucma_file *file, const char __user *inbuf, | |
971 | int in_len, int out_len) | |
972 | { | |
973 | struct rdma_ucm_accept cmd; | |
974 | struct rdma_conn_param conn_param; | |
975 | struct ucma_context *ctx; | |
976 | int ret; | |
977 | ||
978 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
979 | return -EFAULT; | |
980 | ||
981 | ctx = ucma_get_ctx(file, cmd.id); | |
982 | if (IS_ERR(ctx)) | |
983 | return PTR_ERR(ctx); | |
984 | ||
985 | if (cmd.conn_param.valid) { | |
5c438135 | 986 | ucma_copy_conn_param(ctx->cm_id, &conn_param, &cmd.conn_param); |
9ced69ca | 987 | mutex_lock(&file->mut); |
75216638 | 988 | ret = rdma_accept(ctx->cm_id, &conn_param); |
9ced69ca SH |
989 | if (!ret) |
990 | ctx->uid = cmd.uid; | |
991 | mutex_unlock(&file->mut); | |
75216638 SH |
992 | } else |
993 | ret = rdma_accept(ctx->cm_id, NULL); | |
994 | ||
995 | ucma_put_ctx(ctx); | |
996 | return ret; | |
997 | } | |
998 | ||
999 | static ssize_t ucma_reject(struct ucma_file *file, const char __user *inbuf, | |
1000 | int in_len, int out_len) | |
1001 | { | |
1002 | struct rdma_ucm_reject cmd; | |
1003 | struct ucma_context *ctx; | |
1004 | int ret; | |
1005 | ||
1006 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1007 | return -EFAULT; | |
1008 | ||
1009 | ctx = ucma_get_ctx(file, cmd.id); | |
1010 | if (IS_ERR(ctx)) | |
1011 | return PTR_ERR(ctx); | |
1012 | ||
1013 | ret = rdma_reject(ctx->cm_id, cmd.private_data, cmd.private_data_len); | |
1014 | ucma_put_ctx(ctx); | |
1015 | return ret; | |
1016 | } | |
1017 | ||
1018 | static ssize_t ucma_disconnect(struct ucma_file *file, const char __user *inbuf, | |
1019 | int in_len, int out_len) | |
1020 | { | |
1021 | struct rdma_ucm_disconnect cmd; | |
1022 | struct ucma_context *ctx; | |
1023 | int ret; | |
1024 | ||
1025 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1026 | return -EFAULT; | |
1027 | ||
1028 | ctx = ucma_get_ctx(file, cmd.id); | |
1029 | if (IS_ERR(ctx)) | |
1030 | return PTR_ERR(ctx); | |
1031 | ||
1032 | ret = rdma_disconnect(ctx->cm_id); | |
1033 | ucma_put_ctx(ctx); | |
1034 | return ret; | |
1035 | } | |
1036 | ||
1037 | static ssize_t ucma_init_qp_attr(struct ucma_file *file, | |
1038 | const char __user *inbuf, | |
1039 | int in_len, int out_len) | |
1040 | { | |
1041 | struct rdma_ucm_init_qp_attr cmd; | |
1042 | struct ib_uverbs_qp_attr resp; | |
1043 | struct ucma_context *ctx; | |
1044 | struct ib_qp_attr qp_attr; | |
1045 | int ret; | |
1046 | ||
1047 | if (out_len < sizeof(resp)) | |
1048 | return -ENOSPC; | |
1049 | ||
1050 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1051 | return -EFAULT; | |
1052 | ||
1053 | ctx = ucma_get_ctx(file, cmd.id); | |
1054 | if (IS_ERR(ctx)) | |
1055 | return PTR_ERR(ctx); | |
1056 | ||
1057 | resp.qp_attr_mask = 0; | |
1058 | memset(&qp_attr, 0, sizeof qp_attr); | |
1059 | qp_attr.qp_state = cmd.qp_state; | |
1060 | ret = rdma_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask); | |
1061 | if (ret) | |
1062 | goto out; | |
1063 | ||
1064 | ib_copy_qp_attr_to_user(&resp, &qp_attr); | |
1065 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
1066 | &resp, sizeof(resp))) | |
1067 | ret = -EFAULT; | |
1068 | ||
1069 | out: | |
1070 | ucma_put_ctx(ctx); | |
1071 | return ret; | |
1072 | } | |
1073 | ||
7ce86409 SH |
1074 | static int ucma_set_option_id(struct ucma_context *ctx, int optname, |
1075 | void *optval, size_t optlen) | |
1076 | { | |
1077 | int ret = 0; | |
1078 | ||
1079 | switch (optname) { | |
1080 | case RDMA_OPTION_ID_TOS: | |
1081 | if (optlen != sizeof(u8)) { | |
1082 | ret = -EINVAL; | |
1083 | break; | |
1084 | } | |
1085 | rdma_set_service_type(ctx->cm_id, *((u8 *) optval)); | |
1086 | break; | |
a9bb7912 HS |
1087 | case RDMA_OPTION_ID_REUSEADDR: |
1088 | if (optlen != sizeof(int)) { | |
1089 | ret = -EINVAL; | |
1090 | break; | |
1091 | } | |
1092 | ret = rdma_set_reuseaddr(ctx->cm_id, *((int *) optval) ? 1 : 0); | |
1093 | break; | |
68602120 SH |
1094 | case RDMA_OPTION_ID_AFONLY: |
1095 | if (optlen != sizeof(int)) { | |
1096 | ret = -EINVAL; | |
1097 | break; | |
1098 | } | |
1099 | ret = rdma_set_afonly(ctx->cm_id, *((int *) optval) ? 1 : 0); | |
1100 | break; | |
7ce86409 SH |
1101 | default: |
1102 | ret = -ENOSYS; | |
1103 | } | |
1104 | ||
1105 | return ret; | |
1106 | } | |
1107 | ||
a7ca1f00 SH |
1108 | static int ucma_set_ib_path(struct ucma_context *ctx, |
1109 | struct ib_path_rec_data *path_data, size_t optlen) | |
1110 | { | |
1111 | struct ib_sa_path_rec sa_path; | |
1112 | struct rdma_cm_event event; | |
1113 | int ret; | |
1114 | ||
1115 | if (optlen % sizeof(*path_data)) | |
1116 | return -EINVAL; | |
1117 | ||
1118 | for (; optlen; optlen -= sizeof(*path_data), path_data++) { | |
1119 | if (path_data->flags == (IB_PATH_GMP | IB_PATH_PRIMARY | | |
1120 | IB_PATH_BIDIRECTIONAL)) | |
1121 | break; | |
1122 | } | |
1123 | ||
1124 | if (!optlen) | |
1125 | return -EINVAL; | |
1126 | ||
c2be9dc0 IN |
1127 | memset(&sa_path, 0, sizeof(sa_path)); |
1128 | sa_path.vlan_id = 0xffff; | |
1129 | ||
a7ca1f00 SH |
1130 | ib_sa_unpack_path(path_data->path_rec, &sa_path); |
1131 | ret = rdma_set_ib_paths(ctx->cm_id, &sa_path, 1); | |
1132 | if (ret) | |
1133 | return ret; | |
1134 | ||
1135 | memset(&event, 0, sizeof event); | |
1136 | event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; | |
1137 | return ucma_event_handler(ctx->cm_id, &event); | |
1138 | } | |
1139 | ||
1140 | static int ucma_set_option_ib(struct ucma_context *ctx, int optname, | |
1141 | void *optval, size_t optlen) | |
1142 | { | |
1143 | int ret; | |
1144 | ||
1145 | switch (optname) { | |
1146 | case RDMA_OPTION_IB_PATH: | |
1147 | ret = ucma_set_ib_path(ctx, optval, optlen); | |
1148 | break; | |
1149 | default: | |
1150 | ret = -ENOSYS; | |
1151 | } | |
1152 | ||
1153 | return ret; | |
1154 | } | |
1155 | ||
7ce86409 SH |
1156 | static int ucma_set_option_level(struct ucma_context *ctx, int level, |
1157 | int optname, void *optval, size_t optlen) | |
1158 | { | |
1159 | int ret; | |
1160 | ||
1161 | switch (level) { | |
1162 | case RDMA_OPTION_ID: | |
1163 | ret = ucma_set_option_id(ctx, optname, optval, optlen); | |
1164 | break; | |
a7ca1f00 SH |
1165 | case RDMA_OPTION_IB: |
1166 | ret = ucma_set_option_ib(ctx, optname, optval, optlen); | |
1167 | break; | |
7ce86409 SH |
1168 | default: |
1169 | ret = -ENOSYS; | |
1170 | } | |
1171 | ||
1172 | return ret; | |
1173 | } | |
1174 | ||
1175 | static ssize_t ucma_set_option(struct ucma_file *file, const char __user *inbuf, | |
1176 | int in_len, int out_len) | |
1177 | { | |
1178 | struct rdma_ucm_set_option cmd; | |
1179 | struct ucma_context *ctx; | |
1180 | void *optval; | |
1181 | int ret; | |
1182 | ||
1183 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1184 | return -EFAULT; | |
1185 | ||
1186 | ctx = ucma_get_ctx(file, cmd.id); | |
1187 | if (IS_ERR(ctx)) | |
1188 | return PTR_ERR(ctx); | |
1189 | ||
0764c76e RD |
1190 | optval = memdup_user((void __user *) (unsigned long) cmd.optval, |
1191 | cmd.optlen); | |
1192 | if (IS_ERR(optval)) { | |
1193 | ret = PTR_ERR(optval); | |
1194 | goto out; | |
7ce86409 SH |
1195 | } |
1196 | ||
1197 | ret = ucma_set_option_level(ctx, cmd.level, cmd.optname, optval, | |
1198 | cmd.optlen); | |
7ce86409 | 1199 | kfree(optval); |
0764c76e RD |
1200 | |
1201 | out: | |
7ce86409 SH |
1202 | ucma_put_ctx(ctx); |
1203 | return ret; | |
1204 | } | |
1205 | ||
75216638 SH |
1206 | static ssize_t ucma_notify(struct ucma_file *file, const char __user *inbuf, |
1207 | int in_len, int out_len) | |
1208 | { | |
1209 | struct rdma_ucm_notify cmd; | |
1210 | struct ucma_context *ctx; | |
1211 | int ret; | |
1212 | ||
1213 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1214 | return -EFAULT; | |
1215 | ||
1216 | ctx = ucma_get_ctx(file, cmd.id); | |
1217 | if (IS_ERR(ctx)) | |
1218 | return PTR_ERR(ctx); | |
1219 | ||
1220 | ret = rdma_notify(ctx->cm_id, (enum ib_event_type) cmd.event); | |
1221 | ucma_put_ctx(ctx); | |
1222 | return ret; | |
1223 | } | |
1224 | ||
5bc2b7b3 SH |
1225 | static ssize_t ucma_process_join(struct ucma_file *file, |
1226 | struct rdma_ucm_join_mcast *cmd, int out_len) | |
c8f6a362 | 1227 | { |
c8f6a362 SH |
1228 | struct rdma_ucm_create_id_resp resp; |
1229 | struct ucma_context *ctx; | |
1230 | struct ucma_multicast *mc; | |
5bc2b7b3 | 1231 | struct sockaddr *addr; |
c8f6a362 SH |
1232 | int ret; |
1233 | ||
1234 | if (out_len < sizeof(resp)) | |
1235 | return -ENOSPC; | |
1236 | ||
5bc2b7b3 SH |
1237 | addr = (struct sockaddr *) &cmd->addr; |
1238 | if (cmd->reserved || !cmd->addr_size || (cmd->addr_size != rdma_addr_size(addr))) | |
1239 | return -EINVAL; | |
c8f6a362 | 1240 | |
5bc2b7b3 | 1241 | ctx = ucma_get_ctx(file, cmd->id); |
c8f6a362 SH |
1242 | if (IS_ERR(ctx)) |
1243 | return PTR_ERR(ctx); | |
1244 | ||
1245 | mutex_lock(&file->mut); | |
1246 | mc = ucma_alloc_multicast(ctx); | |
6aea938f JB |
1247 | if (!mc) { |
1248 | ret = -ENOMEM; | |
c8f6a362 SH |
1249 | goto err1; |
1250 | } | |
1251 | ||
5bc2b7b3 SH |
1252 | mc->uid = cmd->uid; |
1253 | memcpy(&mc->addr, addr, cmd->addr_size); | |
3f446754 | 1254 | ret = rdma_join_multicast(ctx->cm_id, (struct sockaddr *) &mc->addr, mc); |
c8f6a362 SH |
1255 | if (ret) |
1256 | goto err2; | |
1257 | ||
1258 | resp.id = mc->id; | |
5bc2b7b3 | 1259 | if (copy_to_user((void __user *)(unsigned long) cmd->response, |
c8f6a362 SH |
1260 | &resp, sizeof(resp))) { |
1261 | ret = -EFAULT; | |
1262 | goto err3; | |
1263 | } | |
1264 | ||
1265 | mutex_unlock(&file->mut); | |
1266 | ucma_put_ctx(ctx); | |
1267 | return 0; | |
1268 | ||
1269 | err3: | |
3f446754 | 1270 | rdma_leave_multicast(ctx->cm_id, (struct sockaddr *) &mc->addr); |
c8f6a362 SH |
1271 | ucma_cleanup_mc_events(mc); |
1272 | err2: | |
1273 | mutex_lock(&mut); | |
1274 | idr_remove(&multicast_idr, mc->id); | |
1275 | mutex_unlock(&mut); | |
1276 | list_del(&mc->list); | |
1277 | kfree(mc); | |
1278 | err1: | |
1279 | mutex_unlock(&file->mut); | |
1280 | ucma_put_ctx(ctx); | |
1281 | return ret; | |
1282 | } | |
1283 | ||
5bc2b7b3 SH |
1284 | static ssize_t ucma_join_ip_multicast(struct ucma_file *file, |
1285 | const char __user *inbuf, | |
1286 | int in_len, int out_len) | |
1287 | { | |
1288 | struct rdma_ucm_join_ip_mcast cmd; | |
1289 | struct rdma_ucm_join_mcast join_cmd; | |
1290 | ||
1291 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1292 | return -EFAULT; | |
1293 | ||
1294 | join_cmd.response = cmd.response; | |
1295 | join_cmd.uid = cmd.uid; | |
1296 | join_cmd.id = cmd.id; | |
1297 | join_cmd.addr_size = rdma_addr_size((struct sockaddr *) &cmd.addr); | |
1298 | join_cmd.reserved = 0; | |
1299 | memcpy(&join_cmd.addr, &cmd.addr, join_cmd.addr_size); | |
1300 | ||
1301 | return ucma_process_join(file, &join_cmd, out_len); | |
1302 | } | |
1303 | ||
1304 | static ssize_t ucma_join_multicast(struct ucma_file *file, | |
1305 | const char __user *inbuf, | |
1306 | int in_len, int out_len) | |
1307 | { | |
1308 | struct rdma_ucm_join_mcast cmd; | |
1309 | ||
1310 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1311 | return -EFAULT; | |
1312 | ||
1313 | return ucma_process_join(file, &cmd, out_len); | |
1314 | } | |
1315 | ||
c8f6a362 SH |
1316 | static ssize_t ucma_leave_multicast(struct ucma_file *file, |
1317 | const char __user *inbuf, | |
1318 | int in_len, int out_len) | |
1319 | { | |
1320 | struct rdma_ucm_destroy_id cmd; | |
1321 | struct rdma_ucm_destroy_id_resp resp; | |
1322 | struct ucma_multicast *mc; | |
1323 | int ret = 0; | |
1324 | ||
1325 | if (out_len < sizeof(resp)) | |
1326 | return -ENOSPC; | |
1327 | ||
1328 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1329 | return -EFAULT; | |
1330 | ||
1331 | mutex_lock(&mut); | |
1332 | mc = idr_find(&multicast_idr, cmd.id); | |
1333 | if (!mc) | |
1334 | mc = ERR_PTR(-ENOENT); | |
1335 | else if (mc->ctx->file != file) | |
1336 | mc = ERR_PTR(-EINVAL); | |
1337 | else { | |
1338 | idr_remove(&multicast_idr, mc->id); | |
1339 | atomic_inc(&mc->ctx->ref); | |
1340 | } | |
1341 | mutex_unlock(&mut); | |
1342 | ||
1343 | if (IS_ERR(mc)) { | |
1344 | ret = PTR_ERR(mc); | |
1345 | goto out; | |
1346 | } | |
1347 | ||
3f446754 | 1348 | rdma_leave_multicast(mc->ctx->cm_id, (struct sockaddr *) &mc->addr); |
c8f6a362 SH |
1349 | mutex_lock(&mc->ctx->file->mut); |
1350 | ucma_cleanup_mc_events(mc); | |
1351 | list_del(&mc->list); | |
1352 | mutex_unlock(&mc->ctx->file->mut); | |
1353 | ||
1354 | ucma_put_ctx(mc->ctx); | |
1355 | resp.events_reported = mc->events_reported; | |
1356 | kfree(mc); | |
1357 | ||
1358 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
1359 | &resp, sizeof(resp))) | |
1360 | ret = -EFAULT; | |
1361 | out: | |
1362 | return ret; | |
1363 | } | |
1364 | ||
88314e4d SH |
1365 | static void ucma_lock_files(struct ucma_file *file1, struct ucma_file *file2) |
1366 | { | |
1367 | /* Acquire mutex's based on pointer comparison to prevent deadlock. */ | |
1368 | if (file1 < file2) { | |
1369 | mutex_lock(&file1->mut); | |
1370 | mutex_lock(&file2->mut); | |
1371 | } else { | |
1372 | mutex_lock(&file2->mut); | |
1373 | mutex_lock(&file1->mut); | |
1374 | } | |
1375 | } | |
1376 | ||
1377 | static void ucma_unlock_files(struct ucma_file *file1, struct ucma_file *file2) | |
1378 | { | |
1379 | if (file1 < file2) { | |
1380 | mutex_unlock(&file2->mut); | |
1381 | mutex_unlock(&file1->mut); | |
1382 | } else { | |
1383 | mutex_unlock(&file1->mut); | |
1384 | mutex_unlock(&file2->mut); | |
1385 | } | |
1386 | } | |
1387 | ||
1388 | static void ucma_move_events(struct ucma_context *ctx, struct ucma_file *file) | |
1389 | { | |
1390 | struct ucma_event *uevent, *tmp; | |
1391 | ||
1392 | list_for_each_entry_safe(uevent, tmp, &ctx->file->event_list, list) | |
1393 | if (uevent->ctx == ctx) | |
1394 | list_move_tail(&uevent->list, &file->event_list); | |
1395 | } | |
1396 | ||
1397 | static ssize_t ucma_migrate_id(struct ucma_file *new_file, | |
1398 | const char __user *inbuf, | |
1399 | int in_len, int out_len) | |
1400 | { | |
1401 | struct rdma_ucm_migrate_id cmd; | |
1402 | struct rdma_ucm_migrate_resp resp; | |
1403 | struct ucma_context *ctx; | |
2903ff01 | 1404 | struct fd f; |
88314e4d SH |
1405 | struct ucma_file *cur_file; |
1406 | int ret = 0; | |
1407 | ||
1408 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1409 | return -EFAULT; | |
1410 | ||
1411 | /* Get current fd to protect against it being closed */ | |
2903ff01 AV |
1412 | f = fdget(cmd.fd); |
1413 | if (!f.file) | |
88314e4d SH |
1414 | return -ENOENT; |
1415 | ||
1416 | /* Validate current fd and prevent destruction of id. */ | |
2903ff01 | 1417 | ctx = ucma_get_ctx(f.file->private_data, cmd.id); |
88314e4d SH |
1418 | if (IS_ERR(ctx)) { |
1419 | ret = PTR_ERR(ctx); | |
1420 | goto file_put; | |
1421 | } | |
1422 | ||
1423 | cur_file = ctx->file; | |
1424 | if (cur_file == new_file) { | |
1425 | resp.events_reported = ctx->events_reported; | |
1426 | goto response; | |
1427 | } | |
1428 | ||
1429 | /* | |
1430 | * Migrate events between fd's, maintaining order, and avoiding new | |
1431 | * events being added before existing events. | |
1432 | */ | |
1433 | ucma_lock_files(cur_file, new_file); | |
1434 | mutex_lock(&mut); | |
1435 | ||
1436 | list_move_tail(&ctx->list, &new_file->ctx_list); | |
1437 | ucma_move_events(ctx, new_file); | |
1438 | ctx->file = new_file; | |
1439 | resp.events_reported = ctx->events_reported; | |
1440 | ||
1441 | mutex_unlock(&mut); | |
1442 | ucma_unlock_files(cur_file, new_file); | |
1443 | ||
1444 | response: | |
1445 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
1446 | &resp, sizeof(resp))) | |
1447 | ret = -EFAULT; | |
1448 | ||
1449 | ucma_put_ctx(ctx); | |
1450 | file_put: | |
2903ff01 | 1451 | fdput(f); |
88314e4d SH |
1452 | return ret; |
1453 | } | |
1454 | ||
75216638 SH |
1455 | static ssize_t (*ucma_cmd_table[])(struct ucma_file *file, |
1456 | const char __user *inbuf, | |
1457 | int in_len, int out_len) = { | |
05ad9457 SH |
1458 | [RDMA_USER_CM_CMD_CREATE_ID] = ucma_create_id, |
1459 | [RDMA_USER_CM_CMD_DESTROY_ID] = ucma_destroy_id, | |
1460 | [RDMA_USER_CM_CMD_BIND_IP] = ucma_bind_ip, | |
1461 | [RDMA_USER_CM_CMD_RESOLVE_IP] = ucma_resolve_ip, | |
1462 | [RDMA_USER_CM_CMD_RESOLVE_ROUTE] = ucma_resolve_route, | |
1463 | [RDMA_USER_CM_CMD_QUERY_ROUTE] = ucma_query_route, | |
1464 | [RDMA_USER_CM_CMD_CONNECT] = ucma_connect, | |
1465 | [RDMA_USER_CM_CMD_LISTEN] = ucma_listen, | |
1466 | [RDMA_USER_CM_CMD_ACCEPT] = ucma_accept, | |
1467 | [RDMA_USER_CM_CMD_REJECT] = ucma_reject, | |
1468 | [RDMA_USER_CM_CMD_DISCONNECT] = ucma_disconnect, | |
1469 | [RDMA_USER_CM_CMD_INIT_QP_ATTR] = ucma_init_qp_attr, | |
1470 | [RDMA_USER_CM_CMD_GET_EVENT] = ucma_get_event, | |
1471 | [RDMA_USER_CM_CMD_GET_OPTION] = NULL, | |
1472 | [RDMA_USER_CM_CMD_SET_OPTION] = ucma_set_option, | |
1473 | [RDMA_USER_CM_CMD_NOTIFY] = ucma_notify, | |
1474 | [RDMA_USER_CM_CMD_JOIN_IP_MCAST] = ucma_join_ip_multicast, | |
1475 | [RDMA_USER_CM_CMD_LEAVE_MCAST] = ucma_leave_multicast, | |
1476 | [RDMA_USER_CM_CMD_MIGRATE_ID] = ucma_migrate_id, | |
eebe4c3a | 1477 | [RDMA_USER_CM_CMD_QUERY] = ucma_query, |
209cf2a7 | 1478 | [RDMA_USER_CM_CMD_BIND] = ucma_bind, |
5bc2b7b3 SH |
1479 | [RDMA_USER_CM_CMD_RESOLVE_ADDR] = ucma_resolve_addr, |
1480 | [RDMA_USER_CM_CMD_JOIN_MCAST] = ucma_join_multicast | |
75216638 SH |
1481 | }; |
1482 | ||
1483 | static ssize_t ucma_write(struct file *filp, const char __user *buf, | |
1484 | size_t len, loff_t *pos) | |
1485 | { | |
1486 | struct ucma_file *file = filp->private_data; | |
1487 | struct rdma_ucm_cmd_hdr hdr; | |
1488 | ssize_t ret; | |
1489 | ||
1490 | if (len < sizeof(hdr)) | |
1491 | return -EINVAL; | |
1492 | ||
1493 | if (copy_from_user(&hdr, buf, sizeof(hdr))) | |
1494 | return -EFAULT; | |
1495 | ||
caf6e3f2 | 1496 | if (hdr.cmd >= ARRAY_SIZE(ucma_cmd_table)) |
75216638 SH |
1497 | return -EINVAL; |
1498 | ||
1499 | if (hdr.in + sizeof(hdr) > len) | |
1500 | return -EINVAL; | |
1501 | ||
1502 | if (!ucma_cmd_table[hdr.cmd]) | |
1503 | return -ENOSYS; | |
1504 | ||
1505 | ret = ucma_cmd_table[hdr.cmd](file, buf + sizeof(hdr), hdr.in, hdr.out); | |
1506 | if (!ret) | |
1507 | ret = len; | |
1508 | ||
1509 | return ret; | |
1510 | } | |
1511 | ||
1512 | static unsigned int ucma_poll(struct file *filp, struct poll_table_struct *wait) | |
1513 | { | |
1514 | struct ucma_file *file = filp->private_data; | |
1515 | unsigned int mask = 0; | |
1516 | ||
1517 | poll_wait(filp, &file->poll_wait, wait); | |
1518 | ||
1519 | if (!list_empty(&file->event_list)) | |
1520 | mask = POLLIN | POLLRDNORM; | |
1521 | ||
1522 | return mask; | |
1523 | } | |
1524 | ||
f7a6117e RD |
1525 | /* |
1526 | * ucma_open() does not need the BKL: | |
1527 | * | |
1528 | * - no global state is referred to; | |
1529 | * - there is no ioctl method to race against; | |
1530 | * - no further module initialization is required for open to work | |
1531 | * after the device is registered. | |
1532 | */ | |
75216638 SH |
1533 | static int ucma_open(struct inode *inode, struct file *filp) |
1534 | { | |
1535 | struct ucma_file *file; | |
1536 | ||
1537 | file = kmalloc(sizeof *file, GFP_KERNEL); | |
1538 | if (!file) | |
1539 | return -ENOMEM; | |
1540 | ||
1541 | INIT_LIST_HEAD(&file->event_list); | |
1542 | INIT_LIST_HEAD(&file->ctx_list); | |
1543 | init_waitqueue_head(&file->poll_wait); | |
1544 | mutex_init(&file->mut); | |
1545 | ||
1546 | filp->private_data = file; | |
1547 | file->filp = filp; | |
bc1db9af RD |
1548 | |
1549 | return nonseekable_open(inode, filp); | |
75216638 SH |
1550 | } |
1551 | ||
1552 | static int ucma_close(struct inode *inode, struct file *filp) | |
1553 | { | |
1554 | struct ucma_file *file = filp->private_data; | |
1555 | struct ucma_context *ctx, *tmp; | |
1556 | ||
1557 | mutex_lock(&file->mut); | |
1558 | list_for_each_entry_safe(ctx, tmp, &file->ctx_list, list) { | |
1559 | mutex_unlock(&file->mut); | |
1560 | ||
1561 | mutex_lock(&mut); | |
1562 | idr_remove(&ctx_idr, ctx->id); | |
1563 | mutex_unlock(&mut); | |
1564 | ||
1565 | ucma_free_ctx(ctx); | |
1566 | mutex_lock(&file->mut); | |
1567 | } | |
1568 | mutex_unlock(&file->mut); | |
1569 | kfree(file); | |
1570 | return 0; | |
1571 | } | |
1572 | ||
2b8693c0 | 1573 | static const struct file_operations ucma_fops = { |
75216638 SH |
1574 | .owner = THIS_MODULE, |
1575 | .open = ucma_open, | |
1576 | .release = ucma_close, | |
1577 | .write = ucma_write, | |
1578 | .poll = ucma_poll, | |
bc1db9af | 1579 | .llseek = no_llseek, |
75216638 SH |
1580 | }; |
1581 | ||
1582 | static struct miscdevice ucma_misc = { | |
04ea2f81 RD |
1583 | .minor = MISC_DYNAMIC_MINOR, |
1584 | .name = "rdma_cm", | |
1585 | .nodename = "infiniband/rdma_cm", | |
1586 | .mode = 0666, | |
1587 | .fops = &ucma_fops, | |
75216638 SH |
1588 | }; |
1589 | ||
1590 | static ssize_t show_abi_version(struct device *dev, | |
1591 | struct device_attribute *attr, | |
1592 | char *buf) | |
1593 | { | |
1594 | return sprintf(buf, "%d\n", RDMA_USER_CM_ABI_VERSION); | |
1595 | } | |
1596 | static DEVICE_ATTR(abi_version, S_IRUGO, show_abi_version, NULL); | |
1597 | ||
1598 | static int __init ucma_init(void) | |
1599 | { | |
1600 | int ret; | |
1601 | ||
1602 | ret = misc_register(&ucma_misc); | |
1603 | if (ret) | |
1604 | return ret; | |
1605 | ||
1606 | ret = device_create_file(ucma_misc.this_device, &dev_attr_abi_version); | |
1607 | if (ret) { | |
1608 | printk(KERN_ERR "rdma_ucm: couldn't create abi_version attr\n"); | |
97cb7e40 SW |
1609 | goto err1; |
1610 | } | |
1611 | ||
ec8f23ce | 1612 | ucma_ctl_table_hdr = register_net_sysctl(&init_net, "net/rdma_ucm", ucma_ctl_table); |
97cb7e40 SW |
1613 | if (!ucma_ctl_table_hdr) { |
1614 | printk(KERN_ERR "rdma_ucm: couldn't register sysctl paths\n"); | |
1615 | ret = -ENOMEM; | |
1616 | goto err2; | |
75216638 SH |
1617 | } |
1618 | return 0; | |
97cb7e40 SW |
1619 | err2: |
1620 | device_remove_file(ucma_misc.this_device, &dev_attr_abi_version); | |
1621 | err1: | |
75216638 SH |
1622 | misc_deregister(&ucma_misc); |
1623 | return ret; | |
1624 | } | |
1625 | ||
1626 | static void __exit ucma_cleanup(void) | |
1627 | { | |
5dd3df10 | 1628 | unregister_net_sysctl_table(ucma_ctl_table_hdr); |
75216638 SH |
1629 | device_remove_file(ucma_misc.this_device, &dev_attr_abi_version); |
1630 | misc_deregister(&ucma_misc); | |
1631 | idr_destroy(&ctx_idr); | |
1632 | } | |
1633 | ||
1634 | module_init(ucma_init); | |
1635 | module_exit(ucma_cleanup); |