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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> |
75216638 SH |
50 | |
51 | MODULE_AUTHOR("Sean Hefty"); | |
52 | MODULE_DESCRIPTION("RDMA Userspace Connection Manager Access"); | |
53 | MODULE_LICENSE("Dual BSD/GPL"); | |
54 | ||
97cb7e40 SW |
55 | static unsigned int max_backlog = 1024; |
56 | ||
57 | static struct ctl_table_header *ucma_ctl_table_hdr; | |
58 | static ctl_table ucma_ctl_table[] = { | |
59 | { | |
60 | .procname = "max_backlog", | |
61 | .data = &max_backlog, | |
62 | .maxlen = sizeof max_backlog, | |
63 | .mode = 0644, | |
64 | .proc_handler = proc_dointvec, | |
65 | }, | |
66 | { } | |
67 | }; | |
68 | ||
69 | static struct ctl_path ucma_ctl_path[] = { | |
70 | { .procname = "net" }, | |
71 | { .procname = "rdma_ucm" }, | |
72 | { } | |
75216638 SH |
73 | }; |
74 | ||
75 | struct ucma_file { | |
76 | struct mutex mut; | |
77 | struct file *filp; | |
78 | struct list_head ctx_list; | |
79 | struct list_head event_list; | |
80 | wait_queue_head_t poll_wait; | |
81 | }; | |
82 | ||
83 | struct ucma_context { | |
84 | int id; | |
85 | struct completion comp; | |
86 | atomic_t ref; | |
87 | int events_reported; | |
88 | int backlog; | |
89 | ||
90 | struct ucma_file *file; | |
91 | struct rdma_cm_id *cm_id; | |
92 | u64 uid; | |
93 | ||
94 | struct list_head list; | |
c8f6a362 SH |
95 | struct list_head mc_list; |
96 | }; | |
97 | ||
98 | struct ucma_multicast { | |
99 | struct ucma_context *ctx; | |
100 | int id; | |
101 | int events_reported; | |
102 | ||
103 | u64 uid; | |
104 | struct list_head list; | |
3f446754 | 105 | struct sockaddr_storage addr; |
75216638 SH |
106 | }; |
107 | ||
108 | struct ucma_event { | |
109 | struct ucma_context *ctx; | |
c8f6a362 | 110 | struct ucma_multicast *mc; |
75216638 SH |
111 | struct list_head list; |
112 | struct rdma_cm_id *cm_id; | |
113 | struct rdma_ucm_event_resp resp; | |
114 | }; | |
115 | ||
116 | static DEFINE_MUTEX(mut); | |
117 | static DEFINE_IDR(ctx_idr); | |
c8f6a362 | 118 | static DEFINE_IDR(multicast_idr); |
75216638 SH |
119 | |
120 | static inline struct ucma_context *_ucma_find_context(int id, | |
121 | struct ucma_file *file) | |
122 | { | |
123 | struct ucma_context *ctx; | |
124 | ||
125 | ctx = idr_find(&ctx_idr, id); | |
126 | if (!ctx) | |
127 | ctx = ERR_PTR(-ENOENT); | |
128 | else if (ctx->file != file) | |
129 | ctx = ERR_PTR(-EINVAL); | |
130 | return ctx; | |
131 | } | |
132 | ||
133 | static struct ucma_context *ucma_get_ctx(struct ucma_file *file, int id) | |
134 | { | |
135 | struct ucma_context *ctx; | |
136 | ||
137 | mutex_lock(&mut); | |
138 | ctx = _ucma_find_context(id, file); | |
139 | if (!IS_ERR(ctx)) | |
140 | atomic_inc(&ctx->ref); | |
141 | mutex_unlock(&mut); | |
142 | return ctx; | |
143 | } | |
144 | ||
145 | static void ucma_put_ctx(struct ucma_context *ctx) | |
146 | { | |
147 | if (atomic_dec_and_test(&ctx->ref)) | |
148 | complete(&ctx->comp); | |
149 | } | |
150 | ||
151 | static struct ucma_context *ucma_alloc_ctx(struct ucma_file *file) | |
152 | { | |
153 | struct ucma_context *ctx; | |
154 | int ret; | |
155 | ||
156 | ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); | |
157 | if (!ctx) | |
158 | return NULL; | |
159 | ||
160 | atomic_set(&ctx->ref, 1); | |
161 | init_completion(&ctx->comp); | |
c8f6a362 | 162 | INIT_LIST_HEAD(&ctx->mc_list); |
75216638 SH |
163 | ctx->file = file; |
164 | ||
165 | do { | |
166 | ret = idr_pre_get(&ctx_idr, GFP_KERNEL); | |
167 | if (!ret) | |
168 | goto error; | |
169 | ||
170 | mutex_lock(&mut); | |
171 | ret = idr_get_new(&ctx_idr, ctx, &ctx->id); | |
172 | mutex_unlock(&mut); | |
173 | } while (ret == -EAGAIN); | |
174 | ||
175 | if (ret) | |
176 | goto error; | |
177 | ||
178 | list_add_tail(&ctx->list, &file->ctx_list); | |
179 | return ctx; | |
180 | ||
181 | error: | |
182 | kfree(ctx); | |
183 | return NULL; | |
184 | } | |
185 | ||
c8f6a362 SH |
186 | static struct ucma_multicast* ucma_alloc_multicast(struct ucma_context *ctx) |
187 | { | |
188 | struct ucma_multicast *mc; | |
189 | int ret; | |
190 | ||
191 | mc = kzalloc(sizeof(*mc), GFP_KERNEL); | |
192 | if (!mc) | |
193 | return NULL; | |
194 | ||
195 | do { | |
196 | ret = idr_pre_get(&multicast_idr, GFP_KERNEL); | |
197 | if (!ret) | |
198 | goto error; | |
199 | ||
200 | mutex_lock(&mut); | |
201 | ret = idr_get_new(&multicast_idr, mc, &mc->id); | |
202 | mutex_unlock(&mut); | |
203 | } while (ret == -EAGAIN); | |
204 | ||
205 | if (ret) | |
206 | goto error; | |
207 | ||
208 | mc->ctx = ctx; | |
209 | list_add_tail(&mc->list, &ctx->mc_list); | |
210 | return mc; | |
211 | ||
212 | error: | |
213 | kfree(mc); | |
214 | return NULL; | |
215 | } | |
216 | ||
75216638 SH |
217 | static void ucma_copy_conn_event(struct rdma_ucm_conn_param *dst, |
218 | struct rdma_conn_param *src) | |
219 | { | |
220 | if (src->private_data_len) | |
221 | memcpy(dst->private_data, src->private_data, | |
222 | src->private_data_len); | |
223 | dst->private_data_len = src->private_data_len; | |
224 | dst->responder_resources =src->responder_resources; | |
225 | dst->initiator_depth = src->initiator_depth; | |
226 | dst->flow_control = src->flow_control; | |
227 | dst->retry_count = src->retry_count; | |
228 | dst->rnr_retry_count = src->rnr_retry_count; | |
229 | dst->srq = src->srq; | |
230 | dst->qp_num = src->qp_num; | |
231 | } | |
232 | ||
233 | static void ucma_copy_ud_event(struct rdma_ucm_ud_param *dst, | |
234 | struct rdma_ud_param *src) | |
235 | { | |
236 | if (src->private_data_len) | |
237 | memcpy(dst->private_data, src->private_data, | |
238 | src->private_data_len); | |
239 | dst->private_data_len = src->private_data_len; | |
240 | ib_copy_ah_attr_to_user(&dst->ah_attr, &src->ah_attr); | |
241 | dst->qp_num = src->qp_num; | |
242 | dst->qkey = src->qkey; | |
243 | } | |
244 | ||
245 | static void ucma_set_event_context(struct ucma_context *ctx, | |
246 | struct rdma_cm_event *event, | |
247 | struct ucma_event *uevent) | |
248 | { | |
249 | uevent->ctx = ctx; | |
c8f6a362 SH |
250 | switch (event->event) { |
251 | case RDMA_CM_EVENT_MULTICAST_JOIN: | |
252 | case RDMA_CM_EVENT_MULTICAST_ERROR: | |
253 | uevent->mc = (struct ucma_multicast *) | |
254 | event->param.ud.private_data; | |
255 | uevent->resp.uid = uevent->mc->uid; | |
256 | uevent->resp.id = uevent->mc->id; | |
257 | break; | |
258 | default: | |
259 | uevent->resp.uid = ctx->uid; | |
260 | uevent->resp.id = ctx->id; | |
261 | break; | |
262 | } | |
75216638 SH |
263 | } |
264 | ||
265 | static int ucma_event_handler(struct rdma_cm_id *cm_id, | |
266 | struct rdma_cm_event *event) | |
267 | { | |
268 | struct ucma_event *uevent; | |
269 | struct ucma_context *ctx = cm_id->context; | |
270 | int ret = 0; | |
271 | ||
272 | uevent = kzalloc(sizeof(*uevent), GFP_KERNEL); | |
273 | if (!uevent) | |
274 | return event->event == RDMA_CM_EVENT_CONNECT_REQUEST; | |
275 | ||
276 | uevent->cm_id = cm_id; | |
277 | ucma_set_event_context(ctx, event, uevent); | |
278 | uevent->resp.event = event->event; | |
279 | uevent->resp.status = event->status; | |
638ef7a6 | 280 | if (cm_id->qp_type == IB_QPT_UD) |
75216638 SH |
281 | ucma_copy_ud_event(&uevent->resp.param.ud, &event->param.ud); |
282 | else | |
283 | ucma_copy_conn_event(&uevent->resp.param.conn, | |
284 | &event->param.conn); | |
285 | ||
286 | mutex_lock(&ctx->file->mut); | |
287 | if (event->event == RDMA_CM_EVENT_CONNECT_REQUEST) { | |
288 | if (!ctx->backlog) { | |
3492856e | 289 | ret = -ENOMEM; |
30a5ec98 | 290 | kfree(uevent); |
75216638 SH |
291 | goto out; |
292 | } | |
293 | ctx->backlog--; | |
0cefcf0b SH |
294 | } else if (!ctx->uid) { |
295 | /* | |
296 | * We ignore events for new connections until userspace has set | |
297 | * their context. This can only happen if an error occurs on a | |
298 | * new connection before the user accepts it. This is okay, | |
299 | * since the accept will just fail later. | |
300 | */ | |
301 | kfree(uevent); | |
302 | goto out; | |
75216638 | 303 | } |
0cefcf0b | 304 | |
75216638 SH |
305 | list_add_tail(&uevent->list, &ctx->file->event_list); |
306 | wake_up_interruptible(&ctx->file->poll_wait); | |
307 | out: | |
308 | mutex_unlock(&ctx->file->mut); | |
309 | return ret; | |
310 | } | |
311 | ||
312 | static ssize_t ucma_get_event(struct ucma_file *file, const char __user *inbuf, | |
313 | int in_len, int out_len) | |
314 | { | |
315 | struct ucma_context *ctx; | |
316 | struct rdma_ucm_get_event cmd; | |
317 | struct ucma_event *uevent; | |
318 | int ret = 0; | |
319 | DEFINE_WAIT(wait); | |
320 | ||
321 | if (out_len < sizeof uevent->resp) | |
322 | return -ENOSPC; | |
323 | ||
324 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
325 | return -EFAULT; | |
326 | ||
327 | mutex_lock(&file->mut); | |
328 | while (list_empty(&file->event_list)) { | |
d92f7644 | 329 | mutex_unlock(&file->mut); |
75216638 | 330 | |
d92f7644 SH |
331 | if (file->filp->f_flags & O_NONBLOCK) |
332 | return -EAGAIN; | |
333 | ||
334 | if (wait_event_interruptible(file->poll_wait, | |
335 | !list_empty(&file->event_list))) | |
336 | return -ERESTARTSYS; | |
75216638 | 337 | |
75216638 | 338 | mutex_lock(&file->mut); |
75216638 SH |
339 | } |
340 | ||
75216638 SH |
341 | uevent = list_entry(file->event_list.next, struct ucma_event, list); |
342 | ||
343 | if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) { | |
344 | ctx = ucma_alloc_ctx(file); | |
345 | if (!ctx) { | |
346 | ret = -ENOMEM; | |
347 | goto done; | |
348 | } | |
349 | uevent->ctx->backlog++; | |
350 | ctx->cm_id = uevent->cm_id; | |
351 | ctx->cm_id->context = ctx; | |
352 | uevent->resp.id = ctx->id; | |
353 | } | |
354 | ||
355 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
356 | &uevent->resp, sizeof uevent->resp)) { | |
357 | ret = -EFAULT; | |
358 | goto done; | |
359 | } | |
360 | ||
361 | list_del(&uevent->list); | |
362 | uevent->ctx->events_reported++; | |
c8f6a362 SH |
363 | if (uevent->mc) |
364 | uevent->mc->events_reported++; | |
75216638 SH |
365 | kfree(uevent); |
366 | done: | |
367 | mutex_unlock(&file->mut); | |
368 | return ret; | |
369 | } | |
370 | ||
b26f9b99 SH |
371 | static int ucma_get_qp_type(struct rdma_ucm_create_id *cmd, enum ib_qp_type *qp_type) |
372 | { | |
373 | switch (cmd->ps) { | |
374 | case RDMA_PS_TCP: | |
375 | *qp_type = IB_QPT_RC; | |
376 | return 0; | |
377 | case RDMA_PS_UDP: | |
378 | case RDMA_PS_IPOIB: | |
379 | *qp_type = IB_QPT_UD; | |
380 | return 0; | |
638ef7a6 SH |
381 | case RDMA_PS_IB: |
382 | *qp_type = cmd->qp_type; | |
383 | return 0; | |
b26f9b99 SH |
384 | default: |
385 | return -EINVAL; | |
386 | } | |
387 | } | |
388 | ||
389 | static ssize_t ucma_create_id(struct ucma_file *file, const char __user *inbuf, | |
390 | int in_len, int out_len) | |
75216638 SH |
391 | { |
392 | struct rdma_ucm_create_id cmd; | |
393 | struct rdma_ucm_create_id_resp resp; | |
394 | struct ucma_context *ctx; | |
b26f9b99 | 395 | enum ib_qp_type qp_type; |
75216638 SH |
396 | int ret; |
397 | ||
398 | if (out_len < sizeof(resp)) | |
399 | return -ENOSPC; | |
400 | ||
401 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
402 | return -EFAULT; | |
403 | ||
b26f9b99 SH |
404 | ret = ucma_get_qp_type(&cmd, &qp_type); |
405 | if (ret) | |
406 | return ret; | |
407 | ||
75216638 SH |
408 | mutex_lock(&file->mut); |
409 | ctx = ucma_alloc_ctx(file); | |
410 | mutex_unlock(&file->mut); | |
411 | if (!ctx) | |
412 | return -ENOMEM; | |
413 | ||
414 | ctx->uid = cmd.uid; | |
b26f9b99 | 415 | ctx->cm_id = rdma_create_id(ucma_event_handler, ctx, cmd.ps, qp_type); |
75216638 SH |
416 | if (IS_ERR(ctx->cm_id)) { |
417 | ret = PTR_ERR(ctx->cm_id); | |
418 | goto err1; | |
419 | } | |
420 | ||
421 | resp.id = ctx->id; | |
422 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
423 | &resp, sizeof(resp))) { | |
424 | ret = -EFAULT; | |
425 | goto err2; | |
426 | } | |
427 | return 0; | |
428 | ||
429 | err2: | |
430 | rdma_destroy_id(ctx->cm_id); | |
431 | err1: | |
432 | mutex_lock(&mut); | |
433 | idr_remove(&ctx_idr, ctx->id); | |
434 | mutex_unlock(&mut); | |
435 | kfree(ctx); | |
436 | return ret; | |
437 | } | |
438 | ||
c8f6a362 SH |
439 | static void ucma_cleanup_multicast(struct ucma_context *ctx) |
440 | { | |
441 | struct ucma_multicast *mc, *tmp; | |
442 | ||
443 | mutex_lock(&mut); | |
444 | list_for_each_entry_safe(mc, tmp, &ctx->mc_list, list) { | |
445 | list_del(&mc->list); | |
446 | idr_remove(&multicast_idr, mc->id); | |
447 | kfree(mc); | |
448 | } | |
449 | mutex_unlock(&mut); | |
450 | } | |
451 | ||
c8f6a362 SH |
452 | static void ucma_cleanup_mc_events(struct ucma_multicast *mc) |
453 | { | |
454 | struct ucma_event *uevent, *tmp; | |
455 | ||
456 | list_for_each_entry_safe(uevent, tmp, &mc->ctx->file->event_list, list) { | |
457 | if (uevent->mc != mc) | |
458 | continue; | |
459 | ||
460 | list_del(&uevent->list); | |
461 | kfree(uevent); | |
462 | } | |
463 | } | |
464 | ||
186834b5 HS |
465 | /* |
466 | * We cannot hold file->mut when calling rdma_destroy_id() or we can | |
467 | * deadlock. We also acquire file->mut in ucma_event_handler(), and | |
468 | * rdma_destroy_id() will wait until all callbacks have completed. | |
469 | */ | |
75216638 SH |
470 | static int ucma_free_ctx(struct ucma_context *ctx) |
471 | { | |
472 | int events_reported; | |
186834b5 HS |
473 | struct ucma_event *uevent, *tmp; |
474 | LIST_HEAD(list); | |
75216638 SH |
475 | |
476 | /* No new events will be generated after destroying the id. */ | |
477 | rdma_destroy_id(ctx->cm_id); | |
478 | ||
c8f6a362 SH |
479 | ucma_cleanup_multicast(ctx); |
480 | ||
75216638 SH |
481 | /* Cleanup events not yet reported to the user. */ |
482 | mutex_lock(&ctx->file->mut); | |
186834b5 HS |
483 | list_for_each_entry_safe(uevent, tmp, &ctx->file->event_list, list) { |
484 | if (uevent->ctx == ctx) | |
485 | list_move_tail(&uevent->list, &list); | |
486 | } | |
75216638 SH |
487 | list_del(&ctx->list); |
488 | mutex_unlock(&ctx->file->mut); | |
489 | ||
186834b5 HS |
490 | list_for_each_entry_safe(uevent, tmp, &list, list) { |
491 | list_del(&uevent->list); | |
492 | if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) | |
493 | rdma_destroy_id(uevent->cm_id); | |
494 | kfree(uevent); | |
495 | } | |
496 | ||
75216638 SH |
497 | events_reported = ctx->events_reported; |
498 | kfree(ctx); | |
499 | return events_reported; | |
500 | } | |
501 | ||
502 | static ssize_t ucma_destroy_id(struct ucma_file *file, const char __user *inbuf, | |
503 | int in_len, int out_len) | |
504 | { | |
505 | struct rdma_ucm_destroy_id cmd; | |
506 | struct rdma_ucm_destroy_id_resp resp; | |
507 | struct ucma_context *ctx; | |
508 | int ret = 0; | |
509 | ||
510 | if (out_len < sizeof(resp)) | |
511 | return -ENOSPC; | |
512 | ||
513 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
514 | return -EFAULT; | |
515 | ||
516 | mutex_lock(&mut); | |
517 | ctx = _ucma_find_context(cmd.id, file); | |
518 | if (!IS_ERR(ctx)) | |
519 | idr_remove(&ctx_idr, ctx->id); | |
520 | mutex_unlock(&mut); | |
521 | ||
522 | if (IS_ERR(ctx)) | |
523 | return PTR_ERR(ctx); | |
524 | ||
525 | ucma_put_ctx(ctx); | |
526 | wait_for_completion(&ctx->comp); | |
527 | resp.events_reported = ucma_free_ctx(ctx); | |
528 | ||
529 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
530 | &resp, sizeof(resp))) | |
531 | ret = -EFAULT; | |
532 | ||
533 | return ret; | |
534 | } | |
535 | ||
536 | static ssize_t ucma_bind_addr(struct ucma_file *file, const char __user *inbuf, | |
537 | int in_len, int out_len) | |
538 | { | |
539 | struct rdma_ucm_bind_addr cmd; | |
540 | struct ucma_context *ctx; | |
541 | int ret; | |
542 | ||
543 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
544 | return -EFAULT; | |
545 | ||
546 | ctx = ucma_get_ctx(file, cmd.id); | |
547 | if (IS_ERR(ctx)) | |
548 | return PTR_ERR(ctx); | |
549 | ||
550 | ret = rdma_bind_addr(ctx->cm_id, (struct sockaddr *) &cmd.addr); | |
551 | ucma_put_ctx(ctx); | |
552 | return ret; | |
553 | } | |
554 | ||
555 | static ssize_t ucma_resolve_addr(struct ucma_file *file, | |
556 | const char __user *inbuf, | |
557 | int in_len, int out_len) | |
558 | { | |
559 | struct rdma_ucm_resolve_addr cmd; | |
560 | struct ucma_context *ctx; | |
561 | int ret; | |
562 | ||
563 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
564 | return -EFAULT; | |
565 | ||
566 | ctx = ucma_get_ctx(file, cmd.id); | |
567 | if (IS_ERR(ctx)) | |
568 | return PTR_ERR(ctx); | |
569 | ||
570 | ret = rdma_resolve_addr(ctx->cm_id, (struct sockaddr *) &cmd.src_addr, | |
571 | (struct sockaddr *) &cmd.dst_addr, | |
572 | cmd.timeout_ms); | |
573 | ucma_put_ctx(ctx); | |
574 | return ret; | |
575 | } | |
576 | ||
577 | static ssize_t ucma_resolve_route(struct ucma_file *file, | |
578 | const char __user *inbuf, | |
579 | int in_len, int out_len) | |
580 | { | |
581 | struct rdma_ucm_resolve_route cmd; | |
582 | struct ucma_context *ctx; | |
583 | int ret; | |
584 | ||
585 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
586 | return -EFAULT; | |
587 | ||
588 | ctx = ucma_get_ctx(file, cmd.id); | |
589 | if (IS_ERR(ctx)) | |
590 | return PTR_ERR(ctx); | |
591 | ||
592 | ret = rdma_resolve_route(ctx->cm_id, cmd.timeout_ms); | |
593 | ucma_put_ctx(ctx); | |
594 | return ret; | |
595 | } | |
596 | ||
597 | static void ucma_copy_ib_route(struct rdma_ucm_query_route_resp *resp, | |
598 | struct rdma_route *route) | |
599 | { | |
600 | struct rdma_dev_addr *dev_addr; | |
601 | ||
602 | resp->num_paths = route->num_paths; | |
603 | switch (route->num_paths) { | |
604 | case 0: | |
605 | dev_addr = &route->addr.dev_addr; | |
6f8372b6 SH |
606 | rdma_addr_get_dgid(dev_addr, |
607 | (union ib_gid *) &resp->ib_route[0].dgid); | |
608 | rdma_addr_get_sgid(dev_addr, | |
609 | (union ib_gid *) &resp->ib_route[0].sgid); | |
75216638 SH |
610 | resp->ib_route[0].pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); |
611 | break; | |
612 | case 2: | |
613 | ib_copy_path_rec_to_user(&resp->ib_route[1], | |
614 | &route->path_rec[1]); | |
615 | /* fall through */ | |
616 | case 1: | |
617 | ib_copy_path_rec_to_user(&resp->ib_route[0], | |
618 | &route->path_rec[0]); | |
619 | break; | |
620 | default: | |
621 | break; | |
622 | } | |
623 | } | |
624 | ||
3c86aa70 EC |
625 | static void ucma_copy_iboe_route(struct rdma_ucm_query_route_resp *resp, |
626 | struct rdma_route *route) | |
627 | { | |
628 | struct rdma_dev_addr *dev_addr; | |
af7bd463 EC |
629 | struct net_device *dev; |
630 | u16 vid = 0; | |
3c86aa70 EC |
631 | |
632 | resp->num_paths = route->num_paths; | |
633 | switch (route->num_paths) { | |
634 | case 0: | |
635 | dev_addr = &route->addr.dev_addr; | |
af7bd463 EC |
636 | dev = dev_get_by_index(&init_net, dev_addr->bound_dev_if); |
637 | if (dev) { | |
638 | vid = rdma_vlan_dev_vlan_id(dev); | |
639 | dev_put(dev); | |
640 | } | |
641 | ||
642 | iboe_mac_vlan_to_ll((union ib_gid *) &resp->ib_route[0].dgid, | |
643 | dev_addr->dst_dev_addr, vid); | |
3c86aa70 EC |
644 | iboe_addr_get_sgid(dev_addr, |
645 | (union ib_gid *) &resp->ib_route[0].sgid); | |
646 | resp->ib_route[0].pkey = cpu_to_be16(0xffff); | |
647 | break; | |
648 | case 2: | |
649 | ib_copy_path_rec_to_user(&resp->ib_route[1], | |
650 | &route->path_rec[1]); | |
651 | /* fall through */ | |
652 | case 1: | |
653 | ib_copy_path_rec_to_user(&resp->ib_route[0], | |
654 | &route->path_rec[0]); | |
655 | break; | |
656 | default: | |
657 | break; | |
658 | } | |
659 | } | |
660 | ||
e86f8b06 SW |
661 | static void ucma_copy_iw_route(struct rdma_ucm_query_route_resp *resp, |
662 | struct rdma_route *route) | |
663 | { | |
664 | struct rdma_dev_addr *dev_addr; | |
665 | ||
666 | dev_addr = &route->addr.dev_addr; | |
667 | rdma_addr_get_dgid(dev_addr, (union ib_gid *) &resp->ib_route[0].dgid); | |
668 | rdma_addr_get_sgid(dev_addr, (union ib_gid *) &resp->ib_route[0].sgid); | |
669 | } | |
670 | ||
75216638 SH |
671 | static ssize_t ucma_query_route(struct ucma_file *file, |
672 | const char __user *inbuf, | |
673 | int in_len, int out_len) | |
674 | { | |
675 | struct rdma_ucm_query_route cmd; | |
676 | struct rdma_ucm_query_route_resp resp; | |
677 | struct ucma_context *ctx; | |
678 | struct sockaddr *addr; | |
679 | int ret = 0; | |
680 | ||
681 | if (out_len < sizeof(resp)) | |
682 | return -ENOSPC; | |
683 | ||
684 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
685 | return -EFAULT; | |
686 | ||
687 | ctx = ucma_get_ctx(file, cmd.id); | |
688 | if (IS_ERR(ctx)) | |
689 | return PTR_ERR(ctx); | |
690 | ||
691 | memset(&resp, 0, sizeof resp); | |
3f446754 | 692 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.src_addr; |
75216638 SH |
693 | memcpy(&resp.src_addr, addr, addr->sa_family == AF_INET ? |
694 | sizeof(struct sockaddr_in) : | |
695 | sizeof(struct sockaddr_in6)); | |
3f446754 | 696 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.dst_addr; |
75216638 SH |
697 | memcpy(&resp.dst_addr, addr, addr->sa_family == AF_INET ? |
698 | sizeof(struct sockaddr_in) : | |
699 | sizeof(struct sockaddr_in6)); | |
700 | if (!ctx->cm_id->device) | |
701 | goto out; | |
702 | ||
9cda779c | 703 | resp.node_guid = (__force __u64) ctx->cm_id->device->node_guid; |
75216638 | 704 | resp.port_num = ctx->cm_id->port_num; |
e86f8b06 SW |
705 | switch (rdma_node_get_transport(ctx->cm_id->device->node_type)) { |
706 | case RDMA_TRANSPORT_IB: | |
707 | switch (rdma_port_get_link_layer(ctx->cm_id->device, | |
708 | ctx->cm_id->port_num)) { | |
3c86aa70 EC |
709 | case IB_LINK_LAYER_INFINIBAND: |
710 | ucma_copy_ib_route(&resp, &ctx->cm_id->route); | |
711 | break; | |
712 | case IB_LINK_LAYER_ETHERNET: | |
713 | ucma_copy_iboe_route(&resp, &ctx->cm_id->route); | |
714 | break; | |
715 | default: | |
716 | break; | |
717 | } | |
e86f8b06 SW |
718 | break; |
719 | case RDMA_TRANSPORT_IWARP: | |
720 | ucma_copy_iw_route(&resp, &ctx->cm_id->route); | |
721 | break; | |
722 | default: | |
723 | break; | |
75216638 SH |
724 | } |
725 | ||
726 | out: | |
727 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
728 | &resp, sizeof(resp))) | |
729 | ret = -EFAULT; | |
730 | ||
731 | ucma_put_ctx(ctx); | |
732 | return ret; | |
733 | } | |
734 | ||
735 | static void ucma_copy_conn_param(struct rdma_conn_param *dst, | |
736 | struct rdma_ucm_conn_param *src) | |
737 | { | |
738 | dst->private_data = src->private_data; | |
739 | dst->private_data_len = src->private_data_len; | |
740 | dst->responder_resources =src->responder_resources; | |
741 | dst->initiator_depth = src->initiator_depth; | |
742 | dst->flow_control = src->flow_control; | |
743 | dst->retry_count = src->retry_count; | |
744 | dst->rnr_retry_count = src->rnr_retry_count; | |
745 | dst->srq = src->srq; | |
746 | dst->qp_num = src->qp_num; | |
747 | } | |
748 | ||
749 | static ssize_t ucma_connect(struct ucma_file *file, const char __user *inbuf, | |
750 | int in_len, int out_len) | |
751 | { | |
752 | struct rdma_ucm_connect cmd; | |
753 | struct rdma_conn_param conn_param; | |
754 | struct ucma_context *ctx; | |
755 | int ret; | |
756 | ||
757 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
758 | return -EFAULT; | |
759 | ||
760 | if (!cmd.conn_param.valid) | |
761 | return -EINVAL; | |
762 | ||
763 | ctx = ucma_get_ctx(file, cmd.id); | |
764 | if (IS_ERR(ctx)) | |
765 | return PTR_ERR(ctx); | |
766 | ||
767 | ucma_copy_conn_param(&conn_param, &cmd.conn_param); | |
768 | ret = rdma_connect(ctx->cm_id, &conn_param); | |
769 | ucma_put_ctx(ctx); | |
770 | return ret; | |
771 | } | |
772 | ||
773 | static ssize_t ucma_listen(struct ucma_file *file, const char __user *inbuf, | |
774 | int in_len, int out_len) | |
775 | { | |
776 | struct rdma_ucm_listen cmd; | |
777 | struct ucma_context *ctx; | |
778 | int ret; | |
779 | ||
780 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
781 | return -EFAULT; | |
782 | ||
783 | ctx = ucma_get_ctx(file, cmd.id); | |
784 | if (IS_ERR(ctx)) | |
785 | return PTR_ERR(ctx); | |
786 | ||
97cb7e40 SW |
787 | ctx->backlog = cmd.backlog > 0 && cmd.backlog < max_backlog ? |
788 | cmd.backlog : max_backlog; | |
75216638 SH |
789 | ret = rdma_listen(ctx->cm_id, ctx->backlog); |
790 | ucma_put_ctx(ctx); | |
791 | return ret; | |
792 | } | |
793 | ||
794 | static ssize_t ucma_accept(struct ucma_file *file, const char __user *inbuf, | |
795 | int in_len, int out_len) | |
796 | { | |
797 | struct rdma_ucm_accept cmd; | |
798 | struct rdma_conn_param conn_param; | |
799 | struct ucma_context *ctx; | |
800 | int ret; | |
801 | ||
802 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
803 | return -EFAULT; | |
804 | ||
805 | ctx = ucma_get_ctx(file, cmd.id); | |
806 | if (IS_ERR(ctx)) | |
807 | return PTR_ERR(ctx); | |
808 | ||
809 | if (cmd.conn_param.valid) { | |
75216638 | 810 | ucma_copy_conn_param(&conn_param, &cmd.conn_param); |
9ced69ca | 811 | mutex_lock(&file->mut); |
75216638 | 812 | ret = rdma_accept(ctx->cm_id, &conn_param); |
9ced69ca SH |
813 | if (!ret) |
814 | ctx->uid = cmd.uid; | |
815 | mutex_unlock(&file->mut); | |
75216638 SH |
816 | } else |
817 | ret = rdma_accept(ctx->cm_id, NULL); | |
818 | ||
819 | ucma_put_ctx(ctx); | |
820 | return ret; | |
821 | } | |
822 | ||
823 | static ssize_t ucma_reject(struct ucma_file *file, const char __user *inbuf, | |
824 | int in_len, int out_len) | |
825 | { | |
826 | struct rdma_ucm_reject cmd; | |
827 | struct ucma_context *ctx; | |
828 | int ret; | |
829 | ||
830 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
831 | return -EFAULT; | |
832 | ||
833 | ctx = ucma_get_ctx(file, cmd.id); | |
834 | if (IS_ERR(ctx)) | |
835 | return PTR_ERR(ctx); | |
836 | ||
837 | ret = rdma_reject(ctx->cm_id, cmd.private_data, cmd.private_data_len); | |
838 | ucma_put_ctx(ctx); | |
839 | return ret; | |
840 | } | |
841 | ||
842 | static ssize_t ucma_disconnect(struct ucma_file *file, const char __user *inbuf, | |
843 | int in_len, int out_len) | |
844 | { | |
845 | struct rdma_ucm_disconnect cmd; | |
846 | struct ucma_context *ctx; | |
847 | int ret; | |
848 | ||
849 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
850 | return -EFAULT; | |
851 | ||
852 | ctx = ucma_get_ctx(file, cmd.id); | |
853 | if (IS_ERR(ctx)) | |
854 | return PTR_ERR(ctx); | |
855 | ||
856 | ret = rdma_disconnect(ctx->cm_id); | |
857 | ucma_put_ctx(ctx); | |
858 | return ret; | |
859 | } | |
860 | ||
861 | static ssize_t ucma_init_qp_attr(struct ucma_file *file, | |
862 | const char __user *inbuf, | |
863 | int in_len, int out_len) | |
864 | { | |
865 | struct rdma_ucm_init_qp_attr cmd; | |
866 | struct ib_uverbs_qp_attr resp; | |
867 | struct ucma_context *ctx; | |
868 | struct ib_qp_attr qp_attr; | |
869 | int ret; | |
870 | ||
871 | if (out_len < sizeof(resp)) | |
872 | return -ENOSPC; | |
873 | ||
874 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
875 | return -EFAULT; | |
876 | ||
877 | ctx = ucma_get_ctx(file, cmd.id); | |
878 | if (IS_ERR(ctx)) | |
879 | return PTR_ERR(ctx); | |
880 | ||
881 | resp.qp_attr_mask = 0; | |
882 | memset(&qp_attr, 0, sizeof qp_attr); | |
883 | qp_attr.qp_state = cmd.qp_state; | |
884 | ret = rdma_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask); | |
885 | if (ret) | |
886 | goto out; | |
887 | ||
888 | ib_copy_qp_attr_to_user(&resp, &qp_attr); | |
889 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
890 | &resp, sizeof(resp))) | |
891 | ret = -EFAULT; | |
892 | ||
893 | out: | |
894 | ucma_put_ctx(ctx); | |
895 | return ret; | |
896 | } | |
897 | ||
7ce86409 SH |
898 | static int ucma_set_option_id(struct ucma_context *ctx, int optname, |
899 | void *optval, size_t optlen) | |
900 | { | |
901 | int ret = 0; | |
902 | ||
903 | switch (optname) { | |
904 | case RDMA_OPTION_ID_TOS: | |
905 | if (optlen != sizeof(u8)) { | |
906 | ret = -EINVAL; | |
907 | break; | |
908 | } | |
909 | rdma_set_service_type(ctx->cm_id, *((u8 *) optval)); | |
910 | break; | |
a9bb7912 HS |
911 | case RDMA_OPTION_ID_REUSEADDR: |
912 | if (optlen != sizeof(int)) { | |
913 | ret = -EINVAL; | |
914 | break; | |
915 | } | |
916 | ret = rdma_set_reuseaddr(ctx->cm_id, *((int *) optval) ? 1 : 0); | |
917 | break; | |
7ce86409 SH |
918 | default: |
919 | ret = -ENOSYS; | |
920 | } | |
921 | ||
922 | return ret; | |
923 | } | |
924 | ||
a7ca1f00 SH |
925 | static int ucma_set_ib_path(struct ucma_context *ctx, |
926 | struct ib_path_rec_data *path_data, size_t optlen) | |
927 | { | |
928 | struct ib_sa_path_rec sa_path; | |
929 | struct rdma_cm_event event; | |
930 | int ret; | |
931 | ||
932 | if (optlen % sizeof(*path_data)) | |
933 | return -EINVAL; | |
934 | ||
935 | for (; optlen; optlen -= sizeof(*path_data), path_data++) { | |
936 | if (path_data->flags == (IB_PATH_GMP | IB_PATH_PRIMARY | | |
937 | IB_PATH_BIDIRECTIONAL)) | |
938 | break; | |
939 | } | |
940 | ||
941 | if (!optlen) | |
942 | return -EINVAL; | |
943 | ||
944 | ib_sa_unpack_path(path_data->path_rec, &sa_path); | |
945 | ret = rdma_set_ib_paths(ctx->cm_id, &sa_path, 1); | |
946 | if (ret) | |
947 | return ret; | |
948 | ||
949 | memset(&event, 0, sizeof event); | |
950 | event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; | |
951 | return ucma_event_handler(ctx->cm_id, &event); | |
952 | } | |
953 | ||
954 | static int ucma_set_option_ib(struct ucma_context *ctx, int optname, | |
955 | void *optval, size_t optlen) | |
956 | { | |
957 | int ret; | |
958 | ||
959 | switch (optname) { | |
960 | case RDMA_OPTION_IB_PATH: | |
961 | ret = ucma_set_ib_path(ctx, optval, optlen); | |
962 | break; | |
963 | default: | |
964 | ret = -ENOSYS; | |
965 | } | |
966 | ||
967 | return ret; | |
968 | } | |
969 | ||
7ce86409 SH |
970 | static int ucma_set_option_level(struct ucma_context *ctx, int level, |
971 | int optname, void *optval, size_t optlen) | |
972 | { | |
973 | int ret; | |
974 | ||
975 | switch (level) { | |
976 | case RDMA_OPTION_ID: | |
977 | ret = ucma_set_option_id(ctx, optname, optval, optlen); | |
978 | break; | |
a7ca1f00 SH |
979 | case RDMA_OPTION_IB: |
980 | ret = ucma_set_option_ib(ctx, optname, optval, optlen); | |
981 | break; | |
7ce86409 SH |
982 | default: |
983 | ret = -ENOSYS; | |
984 | } | |
985 | ||
986 | return ret; | |
987 | } | |
988 | ||
989 | static ssize_t ucma_set_option(struct ucma_file *file, const char __user *inbuf, | |
990 | int in_len, int out_len) | |
991 | { | |
992 | struct rdma_ucm_set_option cmd; | |
993 | struct ucma_context *ctx; | |
994 | void *optval; | |
995 | int ret; | |
996 | ||
997 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
998 | return -EFAULT; | |
999 | ||
1000 | ctx = ucma_get_ctx(file, cmd.id); | |
1001 | if (IS_ERR(ctx)) | |
1002 | return PTR_ERR(ctx); | |
1003 | ||
1004 | optval = kmalloc(cmd.optlen, GFP_KERNEL); | |
1005 | if (!optval) { | |
1006 | ret = -ENOMEM; | |
1007 | goto out1; | |
1008 | } | |
1009 | ||
1010 | if (copy_from_user(optval, (void __user *) (unsigned long) cmd.optval, | |
1011 | cmd.optlen)) { | |
1012 | ret = -EFAULT; | |
1013 | goto out2; | |
1014 | } | |
1015 | ||
1016 | ret = ucma_set_option_level(ctx, cmd.level, cmd.optname, optval, | |
1017 | cmd.optlen); | |
1018 | out2: | |
1019 | kfree(optval); | |
1020 | out1: | |
1021 | ucma_put_ctx(ctx); | |
1022 | return ret; | |
1023 | } | |
1024 | ||
75216638 SH |
1025 | static ssize_t ucma_notify(struct ucma_file *file, const char __user *inbuf, |
1026 | int in_len, int out_len) | |
1027 | { | |
1028 | struct rdma_ucm_notify cmd; | |
1029 | struct ucma_context *ctx; | |
1030 | int ret; | |
1031 | ||
1032 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1033 | return -EFAULT; | |
1034 | ||
1035 | ctx = ucma_get_ctx(file, cmd.id); | |
1036 | if (IS_ERR(ctx)) | |
1037 | return PTR_ERR(ctx); | |
1038 | ||
1039 | ret = rdma_notify(ctx->cm_id, (enum ib_event_type) cmd.event); | |
1040 | ucma_put_ctx(ctx); | |
1041 | return ret; | |
1042 | } | |
1043 | ||
c8f6a362 SH |
1044 | static ssize_t ucma_join_multicast(struct ucma_file *file, |
1045 | const char __user *inbuf, | |
1046 | int in_len, int out_len) | |
1047 | { | |
1048 | struct rdma_ucm_join_mcast cmd; | |
1049 | struct rdma_ucm_create_id_resp resp; | |
1050 | struct ucma_context *ctx; | |
1051 | struct ucma_multicast *mc; | |
1052 | int ret; | |
1053 | ||
1054 | if (out_len < sizeof(resp)) | |
1055 | return -ENOSPC; | |
1056 | ||
1057 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1058 | return -EFAULT; | |
1059 | ||
1060 | ctx = ucma_get_ctx(file, cmd.id); | |
1061 | if (IS_ERR(ctx)) | |
1062 | return PTR_ERR(ctx); | |
1063 | ||
1064 | mutex_lock(&file->mut); | |
1065 | mc = ucma_alloc_multicast(ctx); | |
6aea938f JB |
1066 | if (!mc) { |
1067 | ret = -ENOMEM; | |
c8f6a362 SH |
1068 | goto err1; |
1069 | } | |
1070 | ||
1071 | mc->uid = cmd.uid; | |
1072 | memcpy(&mc->addr, &cmd.addr, sizeof cmd.addr); | |
3f446754 | 1073 | ret = rdma_join_multicast(ctx->cm_id, (struct sockaddr *) &mc->addr, mc); |
c8f6a362 SH |
1074 | if (ret) |
1075 | goto err2; | |
1076 | ||
1077 | resp.id = mc->id; | |
1078 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
1079 | &resp, sizeof(resp))) { | |
1080 | ret = -EFAULT; | |
1081 | goto err3; | |
1082 | } | |
1083 | ||
1084 | mutex_unlock(&file->mut); | |
1085 | ucma_put_ctx(ctx); | |
1086 | return 0; | |
1087 | ||
1088 | err3: | |
3f446754 | 1089 | rdma_leave_multicast(ctx->cm_id, (struct sockaddr *) &mc->addr); |
c8f6a362 SH |
1090 | ucma_cleanup_mc_events(mc); |
1091 | err2: | |
1092 | mutex_lock(&mut); | |
1093 | idr_remove(&multicast_idr, mc->id); | |
1094 | mutex_unlock(&mut); | |
1095 | list_del(&mc->list); | |
1096 | kfree(mc); | |
1097 | err1: | |
1098 | mutex_unlock(&file->mut); | |
1099 | ucma_put_ctx(ctx); | |
1100 | return ret; | |
1101 | } | |
1102 | ||
1103 | static ssize_t ucma_leave_multicast(struct ucma_file *file, | |
1104 | const char __user *inbuf, | |
1105 | int in_len, int out_len) | |
1106 | { | |
1107 | struct rdma_ucm_destroy_id cmd; | |
1108 | struct rdma_ucm_destroy_id_resp resp; | |
1109 | struct ucma_multicast *mc; | |
1110 | int ret = 0; | |
1111 | ||
1112 | if (out_len < sizeof(resp)) | |
1113 | return -ENOSPC; | |
1114 | ||
1115 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1116 | return -EFAULT; | |
1117 | ||
1118 | mutex_lock(&mut); | |
1119 | mc = idr_find(&multicast_idr, cmd.id); | |
1120 | if (!mc) | |
1121 | mc = ERR_PTR(-ENOENT); | |
1122 | else if (mc->ctx->file != file) | |
1123 | mc = ERR_PTR(-EINVAL); | |
1124 | else { | |
1125 | idr_remove(&multicast_idr, mc->id); | |
1126 | atomic_inc(&mc->ctx->ref); | |
1127 | } | |
1128 | mutex_unlock(&mut); | |
1129 | ||
1130 | if (IS_ERR(mc)) { | |
1131 | ret = PTR_ERR(mc); | |
1132 | goto out; | |
1133 | } | |
1134 | ||
3f446754 | 1135 | rdma_leave_multicast(mc->ctx->cm_id, (struct sockaddr *) &mc->addr); |
c8f6a362 SH |
1136 | mutex_lock(&mc->ctx->file->mut); |
1137 | ucma_cleanup_mc_events(mc); | |
1138 | list_del(&mc->list); | |
1139 | mutex_unlock(&mc->ctx->file->mut); | |
1140 | ||
1141 | ucma_put_ctx(mc->ctx); | |
1142 | resp.events_reported = mc->events_reported; | |
1143 | kfree(mc); | |
1144 | ||
1145 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
1146 | &resp, sizeof(resp))) | |
1147 | ret = -EFAULT; | |
1148 | out: | |
1149 | return ret; | |
1150 | } | |
1151 | ||
88314e4d SH |
1152 | static void ucma_lock_files(struct ucma_file *file1, struct ucma_file *file2) |
1153 | { | |
1154 | /* Acquire mutex's based on pointer comparison to prevent deadlock. */ | |
1155 | if (file1 < file2) { | |
1156 | mutex_lock(&file1->mut); | |
1157 | mutex_lock(&file2->mut); | |
1158 | } else { | |
1159 | mutex_lock(&file2->mut); | |
1160 | mutex_lock(&file1->mut); | |
1161 | } | |
1162 | } | |
1163 | ||
1164 | static void ucma_unlock_files(struct ucma_file *file1, struct ucma_file *file2) | |
1165 | { | |
1166 | if (file1 < file2) { | |
1167 | mutex_unlock(&file2->mut); | |
1168 | mutex_unlock(&file1->mut); | |
1169 | } else { | |
1170 | mutex_unlock(&file1->mut); | |
1171 | mutex_unlock(&file2->mut); | |
1172 | } | |
1173 | } | |
1174 | ||
1175 | static void ucma_move_events(struct ucma_context *ctx, struct ucma_file *file) | |
1176 | { | |
1177 | struct ucma_event *uevent, *tmp; | |
1178 | ||
1179 | list_for_each_entry_safe(uevent, tmp, &ctx->file->event_list, list) | |
1180 | if (uevent->ctx == ctx) | |
1181 | list_move_tail(&uevent->list, &file->event_list); | |
1182 | } | |
1183 | ||
1184 | static ssize_t ucma_migrate_id(struct ucma_file *new_file, | |
1185 | const char __user *inbuf, | |
1186 | int in_len, int out_len) | |
1187 | { | |
1188 | struct rdma_ucm_migrate_id cmd; | |
1189 | struct rdma_ucm_migrate_resp resp; | |
1190 | struct ucma_context *ctx; | |
1191 | struct file *filp; | |
1192 | struct ucma_file *cur_file; | |
1193 | int ret = 0; | |
1194 | ||
1195 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1196 | return -EFAULT; | |
1197 | ||
1198 | /* Get current fd to protect against it being closed */ | |
1199 | filp = fget(cmd.fd); | |
1200 | if (!filp) | |
1201 | return -ENOENT; | |
1202 | ||
1203 | /* Validate current fd and prevent destruction of id. */ | |
1204 | ctx = ucma_get_ctx(filp->private_data, cmd.id); | |
1205 | if (IS_ERR(ctx)) { | |
1206 | ret = PTR_ERR(ctx); | |
1207 | goto file_put; | |
1208 | } | |
1209 | ||
1210 | cur_file = ctx->file; | |
1211 | if (cur_file == new_file) { | |
1212 | resp.events_reported = ctx->events_reported; | |
1213 | goto response; | |
1214 | } | |
1215 | ||
1216 | /* | |
1217 | * Migrate events between fd's, maintaining order, and avoiding new | |
1218 | * events being added before existing events. | |
1219 | */ | |
1220 | ucma_lock_files(cur_file, new_file); | |
1221 | mutex_lock(&mut); | |
1222 | ||
1223 | list_move_tail(&ctx->list, &new_file->ctx_list); | |
1224 | ucma_move_events(ctx, new_file); | |
1225 | ctx->file = new_file; | |
1226 | resp.events_reported = ctx->events_reported; | |
1227 | ||
1228 | mutex_unlock(&mut); | |
1229 | ucma_unlock_files(cur_file, new_file); | |
1230 | ||
1231 | response: | |
1232 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
1233 | &resp, sizeof(resp))) | |
1234 | ret = -EFAULT; | |
1235 | ||
1236 | ucma_put_ctx(ctx); | |
1237 | file_put: | |
1238 | fput(filp); | |
1239 | return ret; | |
1240 | } | |
1241 | ||
75216638 SH |
1242 | static ssize_t (*ucma_cmd_table[])(struct ucma_file *file, |
1243 | const char __user *inbuf, | |
1244 | int in_len, int out_len) = { | |
1245 | [RDMA_USER_CM_CMD_CREATE_ID] = ucma_create_id, | |
1246 | [RDMA_USER_CM_CMD_DESTROY_ID] = ucma_destroy_id, | |
1247 | [RDMA_USER_CM_CMD_BIND_ADDR] = ucma_bind_addr, | |
1248 | [RDMA_USER_CM_CMD_RESOLVE_ADDR] = ucma_resolve_addr, | |
1249 | [RDMA_USER_CM_CMD_RESOLVE_ROUTE]= ucma_resolve_route, | |
1250 | [RDMA_USER_CM_CMD_QUERY_ROUTE] = ucma_query_route, | |
1251 | [RDMA_USER_CM_CMD_CONNECT] = ucma_connect, | |
1252 | [RDMA_USER_CM_CMD_LISTEN] = ucma_listen, | |
1253 | [RDMA_USER_CM_CMD_ACCEPT] = ucma_accept, | |
1254 | [RDMA_USER_CM_CMD_REJECT] = ucma_reject, | |
1255 | [RDMA_USER_CM_CMD_DISCONNECT] = ucma_disconnect, | |
1256 | [RDMA_USER_CM_CMD_INIT_QP_ATTR] = ucma_init_qp_attr, | |
1257 | [RDMA_USER_CM_CMD_GET_EVENT] = ucma_get_event, | |
1258 | [RDMA_USER_CM_CMD_GET_OPTION] = NULL, | |
7ce86409 | 1259 | [RDMA_USER_CM_CMD_SET_OPTION] = ucma_set_option, |
75216638 | 1260 | [RDMA_USER_CM_CMD_NOTIFY] = ucma_notify, |
c8f6a362 SH |
1261 | [RDMA_USER_CM_CMD_JOIN_MCAST] = ucma_join_multicast, |
1262 | [RDMA_USER_CM_CMD_LEAVE_MCAST] = ucma_leave_multicast, | |
88314e4d | 1263 | [RDMA_USER_CM_CMD_MIGRATE_ID] = ucma_migrate_id |
75216638 SH |
1264 | }; |
1265 | ||
1266 | static ssize_t ucma_write(struct file *filp, const char __user *buf, | |
1267 | size_t len, loff_t *pos) | |
1268 | { | |
1269 | struct ucma_file *file = filp->private_data; | |
1270 | struct rdma_ucm_cmd_hdr hdr; | |
1271 | ssize_t ret; | |
1272 | ||
1273 | if (len < sizeof(hdr)) | |
1274 | return -EINVAL; | |
1275 | ||
1276 | if (copy_from_user(&hdr, buf, sizeof(hdr))) | |
1277 | return -EFAULT; | |
1278 | ||
caf6e3f2 | 1279 | if (hdr.cmd >= ARRAY_SIZE(ucma_cmd_table)) |
75216638 SH |
1280 | return -EINVAL; |
1281 | ||
1282 | if (hdr.in + sizeof(hdr) > len) | |
1283 | return -EINVAL; | |
1284 | ||
1285 | if (!ucma_cmd_table[hdr.cmd]) | |
1286 | return -ENOSYS; | |
1287 | ||
1288 | ret = ucma_cmd_table[hdr.cmd](file, buf + sizeof(hdr), hdr.in, hdr.out); | |
1289 | if (!ret) | |
1290 | ret = len; | |
1291 | ||
1292 | return ret; | |
1293 | } | |
1294 | ||
1295 | static unsigned int ucma_poll(struct file *filp, struct poll_table_struct *wait) | |
1296 | { | |
1297 | struct ucma_file *file = filp->private_data; | |
1298 | unsigned int mask = 0; | |
1299 | ||
1300 | poll_wait(filp, &file->poll_wait, wait); | |
1301 | ||
1302 | if (!list_empty(&file->event_list)) | |
1303 | mask = POLLIN | POLLRDNORM; | |
1304 | ||
1305 | return mask; | |
1306 | } | |
1307 | ||
f7a6117e RD |
1308 | /* |
1309 | * ucma_open() does not need the BKL: | |
1310 | * | |
1311 | * - no global state is referred to; | |
1312 | * - there is no ioctl method to race against; | |
1313 | * - no further module initialization is required for open to work | |
1314 | * after the device is registered. | |
1315 | */ | |
75216638 SH |
1316 | static int ucma_open(struct inode *inode, struct file *filp) |
1317 | { | |
1318 | struct ucma_file *file; | |
1319 | ||
1320 | file = kmalloc(sizeof *file, GFP_KERNEL); | |
1321 | if (!file) | |
1322 | return -ENOMEM; | |
1323 | ||
1324 | INIT_LIST_HEAD(&file->event_list); | |
1325 | INIT_LIST_HEAD(&file->ctx_list); | |
1326 | init_waitqueue_head(&file->poll_wait); | |
1327 | mutex_init(&file->mut); | |
1328 | ||
1329 | filp->private_data = file; | |
1330 | file->filp = filp; | |
bc1db9af RD |
1331 | |
1332 | return nonseekable_open(inode, filp); | |
75216638 SH |
1333 | } |
1334 | ||
1335 | static int ucma_close(struct inode *inode, struct file *filp) | |
1336 | { | |
1337 | struct ucma_file *file = filp->private_data; | |
1338 | struct ucma_context *ctx, *tmp; | |
1339 | ||
1340 | mutex_lock(&file->mut); | |
1341 | list_for_each_entry_safe(ctx, tmp, &file->ctx_list, list) { | |
1342 | mutex_unlock(&file->mut); | |
1343 | ||
1344 | mutex_lock(&mut); | |
1345 | idr_remove(&ctx_idr, ctx->id); | |
1346 | mutex_unlock(&mut); | |
1347 | ||
1348 | ucma_free_ctx(ctx); | |
1349 | mutex_lock(&file->mut); | |
1350 | } | |
1351 | mutex_unlock(&file->mut); | |
1352 | kfree(file); | |
1353 | return 0; | |
1354 | } | |
1355 | ||
2b8693c0 | 1356 | static const struct file_operations ucma_fops = { |
75216638 SH |
1357 | .owner = THIS_MODULE, |
1358 | .open = ucma_open, | |
1359 | .release = ucma_close, | |
1360 | .write = ucma_write, | |
1361 | .poll = ucma_poll, | |
bc1db9af | 1362 | .llseek = no_llseek, |
75216638 SH |
1363 | }; |
1364 | ||
1365 | static struct miscdevice ucma_misc = { | |
04ea2f81 RD |
1366 | .minor = MISC_DYNAMIC_MINOR, |
1367 | .name = "rdma_cm", | |
1368 | .nodename = "infiniband/rdma_cm", | |
1369 | .mode = 0666, | |
1370 | .fops = &ucma_fops, | |
75216638 SH |
1371 | }; |
1372 | ||
1373 | static ssize_t show_abi_version(struct device *dev, | |
1374 | struct device_attribute *attr, | |
1375 | char *buf) | |
1376 | { | |
1377 | return sprintf(buf, "%d\n", RDMA_USER_CM_ABI_VERSION); | |
1378 | } | |
1379 | static DEVICE_ATTR(abi_version, S_IRUGO, show_abi_version, NULL); | |
1380 | ||
1381 | static int __init ucma_init(void) | |
1382 | { | |
1383 | int ret; | |
1384 | ||
1385 | ret = misc_register(&ucma_misc); | |
1386 | if (ret) | |
1387 | return ret; | |
1388 | ||
1389 | ret = device_create_file(ucma_misc.this_device, &dev_attr_abi_version); | |
1390 | if (ret) { | |
1391 | printk(KERN_ERR "rdma_ucm: couldn't create abi_version attr\n"); | |
97cb7e40 SW |
1392 | goto err1; |
1393 | } | |
1394 | ||
5dd3df10 | 1395 | ucma_ctl_table_hdr = register_net_sysctl_table(&init_net, ucma_ctl_path, ucma_ctl_table); |
97cb7e40 SW |
1396 | if (!ucma_ctl_table_hdr) { |
1397 | printk(KERN_ERR "rdma_ucm: couldn't register sysctl paths\n"); | |
1398 | ret = -ENOMEM; | |
1399 | goto err2; | |
75216638 SH |
1400 | } |
1401 | return 0; | |
97cb7e40 SW |
1402 | err2: |
1403 | device_remove_file(ucma_misc.this_device, &dev_attr_abi_version); | |
1404 | err1: | |
75216638 SH |
1405 | misc_deregister(&ucma_misc); |
1406 | return ret; | |
1407 | } | |
1408 | ||
1409 | static void __exit ucma_cleanup(void) | |
1410 | { | |
5dd3df10 | 1411 | unregister_net_sysctl_table(ucma_ctl_table_hdr); |
75216638 SH |
1412 | device_remove_file(ucma_misc.this_device, &dev_attr_abi_version); |
1413 | misc_deregister(&ucma_misc); | |
1414 | idr_destroy(&ctx_idr); | |
1415 | } | |
1416 | ||
1417 | module_init(ucma_init); | |
1418 | module_exit(ucma_cleanup); |