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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> |
75216638 SH |
44 | |
45 | #include <rdma/rdma_user_cm.h> | |
46 | #include <rdma/ib_marshall.h> | |
47 | #include <rdma/rdma_cm.h> | |
a7ca1f00 | 48 | #include <rdma/rdma_cm_ib.h> |
75216638 SH |
49 | |
50 | MODULE_AUTHOR("Sean Hefty"); | |
51 | MODULE_DESCRIPTION("RDMA Userspace Connection Manager Access"); | |
52 | MODULE_LICENSE("Dual BSD/GPL"); | |
53 | ||
97cb7e40 SW |
54 | static unsigned int max_backlog = 1024; |
55 | ||
56 | static struct ctl_table_header *ucma_ctl_table_hdr; | |
57 | static ctl_table ucma_ctl_table[] = { | |
58 | { | |
59 | .procname = "max_backlog", | |
60 | .data = &max_backlog, | |
61 | .maxlen = sizeof max_backlog, | |
62 | .mode = 0644, | |
63 | .proc_handler = proc_dointvec, | |
64 | }, | |
65 | { } | |
66 | }; | |
67 | ||
68 | static struct ctl_path ucma_ctl_path[] = { | |
69 | { .procname = "net" }, | |
70 | { .procname = "rdma_ucm" }, | |
71 | { } | |
75216638 SH |
72 | }; |
73 | ||
74 | struct ucma_file { | |
75 | struct mutex mut; | |
76 | struct file *filp; | |
77 | struct list_head ctx_list; | |
78 | struct list_head event_list; | |
79 | wait_queue_head_t poll_wait; | |
80 | }; | |
81 | ||
82 | struct ucma_context { | |
83 | int id; | |
84 | struct completion comp; | |
85 | atomic_t ref; | |
86 | int events_reported; | |
87 | int backlog; | |
88 | ||
89 | struct ucma_file *file; | |
90 | struct rdma_cm_id *cm_id; | |
91 | u64 uid; | |
92 | ||
93 | struct list_head list; | |
c8f6a362 SH |
94 | struct list_head mc_list; |
95 | }; | |
96 | ||
97 | struct ucma_multicast { | |
98 | struct ucma_context *ctx; | |
99 | int id; | |
100 | int events_reported; | |
101 | ||
102 | u64 uid; | |
103 | struct list_head list; | |
3f446754 | 104 | struct sockaddr_storage addr; |
75216638 SH |
105 | }; |
106 | ||
107 | struct ucma_event { | |
108 | struct ucma_context *ctx; | |
c8f6a362 | 109 | struct ucma_multicast *mc; |
75216638 SH |
110 | struct list_head list; |
111 | struct rdma_cm_id *cm_id; | |
112 | struct rdma_ucm_event_resp resp; | |
113 | }; | |
114 | ||
115 | static DEFINE_MUTEX(mut); | |
116 | static DEFINE_IDR(ctx_idr); | |
c8f6a362 | 117 | static DEFINE_IDR(multicast_idr); |
75216638 SH |
118 | |
119 | static inline struct ucma_context *_ucma_find_context(int id, | |
120 | struct ucma_file *file) | |
121 | { | |
122 | struct ucma_context *ctx; | |
123 | ||
124 | ctx = idr_find(&ctx_idr, id); | |
125 | if (!ctx) | |
126 | ctx = ERR_PTR(-ENOENT); | |
127 | else if (ctx->file != file) | |
128 | ctx = ERR_PTR(-EINVAL); | |
129 | return ctx; | |
130 | } | |
131 | ||
132 | static struct ucma_context *ucma_get_ctx(struct ucma_file *file, int id) | |
133 | { | |
134 | struct ucma_context *ctx; | |
135 | ||
136 | mutex_lock(&mut); | |
137 | ctx = _ucma_find_context(id, file); | |
138 | if (!IS_ERR(ctx)) | |
139 | atomic_inc(&ctx->ref); | |
140 | mutex_unlock(&mut); | |
141 | return ctx; | |
142 | } | |
143 | ||
144 | static void ucma_put_ctx(struct ucma_context *ctx) | |
145 | { | |
146 | if (atomic_dec_and_test(&ctx->ref)) | |
147 | complete(&ctx->comp); | |
148 | } | |
149 | ||
150 | static struct ucma_context *ucma_alloc_ctx(struct ucma_file *file) | |
151 | { | |
152 | struct ucma_context *ctx; | |
153 | int ret; | |
154 | ||
155 | ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); | |
156 | if (!ctx) | |
157 | return NULL; | |
158 | ||
159 | atomic_set(&ctx->ref, 1); | |
160 | init_completion(&ctx->comp); | |
c8f6a362 | 161 | INIT_LIST_HEAD(&ctx->mc_list); |
75216638 SH |
162 | ctx->file = file; |
163 | ||
164 | do { | |
165 | ret = idr_pre_get(&ctx_idr, GFP_KERNEL); | |
166 | if (!ret) | |
167 | goto error; | |
168 | ||
169 | mutex_lock(&mut); | |
170 | ret = idr_get_new(&ctx_idr, ctx, &ctx->id); | |
171 | mutex_unlock(&mut); | |
172 | } while (ret == -EAGAIN); | |
173 | ||
174 | if (ret) | |
175 | goto error; | |
176 | ||
177 | list_add_tail(&ctx->list, &file->ctx_list); | |
178 | return ctx; | |
179 | ||
180 | error: | |
181 | kfree(ctx); | |
182 | return NULL; | |
183 | } | |
184 | ||
c8f6a362 SH |
185 | static struct ucma_multicast* ucma_alloc_multicast(struct ucma_context *ctx) |
186 | { | |
187 | struct ucma_multicast *mc; | |
188 | int ret; | |
189 | ||
190 | mc = kzalloc(sizeof(*mc), GFP_KERNEL); | |
191 | if (!mc) | |
192 | return NULL; | |
193 | ||
194 | do { | |
195 | ret = idr_pre_get(&multicast_idr, GFP_KERNEL); | |
196 | if (!ret) | |
197 | goto error; | |
198 | ||
199 | mutex_lock(&mut); | |
200 | ret = idr_get_new(&multicast_idr, mc, &mc->id); | |
201 | mutex_unlock(&mut); | |
202 | } while (ret == -EAGAIN); | |
203 | ||
204 | if (ret) | |
205 | goto error; | |
206 | ||
207 | mc->ctx = ctx; | |
208 | list_add_tail(&mc->list, &ctx->mc_list); | |
209 | return mc; | |
210 | ||
211 | error: | |
212 | kfree(mc); | |
213 | return NULL; | |
214 | } | |
215 | ||
75216638 SH |
216 | static void ucma_copy_conn_event(struct rdma_ucm_conn_param *dst, |
217 | struct rdma_conn_param *src) | |
218 | { | |
219 | if (src->private_data_len) | |
220 | memcpy(dst->private_data, src->private_data, | |
221 | src->private_data_len); | |
222 | dst->private_data_len = src->private_data_len; | |
223 | dst->responder_resources =src->responder_resources; | |
224 | dst->initiator_depth = src->initiator_depth; | |
225 | dst->flow_control = src->flow_control; | |
226 | dst->retry_count = src->retry_count; | |
227 | dst->rnr_retry_count = src->rnr_retry_count; | |
228 | dst->srq = src->srq; | |
229 | dst->qp_num = src->qp_num; | |
230 | } | |
231 | ||
232 | static void ucma_copy_ud_event(struct rdma_ucm_ud_param *dst, | |
233 | struct rdma_ud_param *src) | |
234 | { | |
235 | if (src->private_data_len) | |
236 | memcpy(dst->private_data, src->private_data, | |
237 | src->private_data_len); | |
238 | dst->private_data_len = src->private_data_len; | |
239 | ib_copy_ah_attr_to_user(&dst->ah_attr, &src->ah_attr); | |
240 | dst->qp_num = src->qp_num; | |
241 | dst->qkey = src->qkey; | |
242 | } | |
243 | ||
244 | static void ucma_set_event_context(struct ucma_context *ctx, | |
245 | struct rdma_cm_event *event, | |
246 | struct ucma_event *uevent) | |
247 | { | |
248 | uevent->ctx = ctx; | |
c8f6a362 SH |
249 | switch (event->event) { |
250 | case RDMA_CM_EVENT_MULTICAST_JOIN: | |
251 | case RDMA_CM_EVENT_MULTICAST_ERROR: | |
252 | uevent->mc = (struct ucma_multicast *) | |
253 | event->param.ud.private_data; | |
254 | uevent->resp.uid = uevent->mc->uid; | |
255 | uevent->resp.id = uevent->mc->id; | |
256 | break; | |
257 | default: | |
258 | uevent->resp.uid = ctx->uid; | |
259 | uevent->resp.id = ctx->id; | |
260 | break; | |
261 | } | |
75216638 SH |
262 | } |
263 | ||
264 | static int ucma_event_handler(struct rdma_cm_id *cm_id, | |
265 | struct rdma_cm_event *event) | |
266 | { | |
267 | struct ucma_event *uevent; | |
268 | struct ucma_context *ctx = cm_id->context; | |
269 | int ret = 0; | |
270 | ||
271 | uevent = kzalloc(sizeof(*uevent), GFP_KERNEL); | |
272 | if (!uevent) | |
273 | return event->event == RDMA_CM_EVENT_CONNECT_REQUEST; | |
274 | ||
275 | uevent->cm_id = cm_id; | |
276 | ucma_set_event_context(ctx, event, uevent); | |
277 | uevent->resp.event = event->event; | |
278 | uevent->resp.status = event->status; | |
c8f6a362 | 279 | if (cm_id->ps == RDMA_PS_UDP || cm_id->ps == RDMA_PS_IPOIB) |
75216638 SH |
280 | ucma_copy_ud_event(&uevent->resp.param.ud, &event->param.ud); |
281 | else | |
282 | ucma_copy_conn_event(&uevent->resp.param.conn, | |
283 | &event->param.conn); | |
284 | ||
285 | mutex_lock(&ctx->file->mut); | |
286 | if (event->event == RDMA_CM_EVENT_CONNECT_REQUEST) { | |
287 | if (!ctx->backlog) { | |
3492856e | 288 | ret = -ENOMEM; |
30a5ec98 | 289 | kfree(uevent); |
75216638 SH |
290 | goto out; |
291 | } | |
292 | ctx->backlog--; | |
0cefcf0b SH |
293 | } else if (!ctx->uid) { |
294 | /* | |
295 | * We ignore events for new connections until userspace has set | |
296 | * their context. This can only happen if an error occurs on a | |
297 | * new connection before the user accepts it. This is okay, | |
298 | * since the accept will just fail later. | |
299 | */ | |
300 | kfree(uevent); | |
301 | goto out; | |
75216638 | 302 | } |
0cefcf0b | 303 | |
75216638 SH |
304 | list_add_tail(&uevent->list, &ctx->file->event_list); |
305 | wake_up_interruptible(&ctx->file->poll_wait); | |
306 | out: | |
307 | mutex_unlock(&ctx->file->mut); | |
308 | return ret; | |
309 | } | |
310 | ||
311 | static ssize_t ucma_get_event(struct ucma_file *file, const char __user *inbuf, | |
312 | int in_len, int out_len) | |
313 | { | |
314 | struct ucma_context *ctx; | |
315 | struct rdma_ucm_get_event cmd; | |
316 | struct ucma_event *uevent; | |
317 | int ret = 0; | |
318 | DEFINE_WAIT(wait); | |
319 | ||
320 | if (out_len < sizeof uevent->resp) | |
321 | return -ENOSPC; | |
322 | ||
323 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
324 | return -EFAULT; | |
325 | ||
326 | mutex_lock(&file->mut); | |
327 | while (list_empty(&file->event_list)) { | |
d92f7644 | 328 | mutex_unlock(&file->mut); |
75216638 | 329 | |
d92f7644 SH |
330 | if (file->filp->f_flags & O_NONBLOCK) |
331 | return -EAGAIN; | |
332 | ||
333 | if (wait_event_interruptible(file->poll_wait, | |
334 | !list_empty(&file->event_list))) | |
335 | return -ERESTARTSYS; | |
75216638 | 336 | |
75216638 | 337 | mutex_lock(&file->mut); |
75216638 SH |
338 | } |
339 | ||
75216638 SH |
340 | uevent = list_entry(file->event_list.next, struct ucma_event, list); |
341 | ||
342 | if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) { | |
343 | ctx = ucma_alloc_ctx(file); | |
344 | if (!ctx) { | |
345 | ret = -ENOMEM; | |
346 | goto done; | |
347 | } | |
348 | uevent->ctx->backlog++; | |
349 | ctx->cm_id = uevent->cm_id; | |
350 | ctx->cm_id->context = ctx; | |
351 | uevent->resp.id = ctx->id; | |
352 | } | |
353 | ||
354 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
355 | &uevent->resp, sizeof uevent->resp)) { | |
356 | ret = -EFAULT; | |
357 | goto done; | |
358 | } | |
359 | ||
360 | list_del(&uevent->list); | |
361 | uevent->ctx->events_reported++; | |
c8f6a362 SH |
362 | if (uevent->mc) |
363 | uevent->mc->events_reported++; | |
75216638 SH |
364 | kfree(uevent); |
365 | done: | |
366 | mutex_unlock(&file->mut); | |
367 | return ret; | |
368 | } | |
369 | ||
370 | static ssize_t ucma_create_id(struct ucma_file *file, | |
371 | const char __user *inbuf, | |
372 | int in_len, int out_len) | |
373 | { | |
374 | struct rdma_ucm_create_id cmd; | |
375 | struct rdma_ucm_create_id_resp resp; | |
376 | struct ucma_context *ctx; | |
377 | int ret; | |
378 | ||
379 | if (out_len < sizeof(resp)) | |
380 | return -ENOSPC; | |
381 | ||
382 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
383 | return -EFAULT; | |
384 | ||
385 | mutex_lock(&file->mut); | |
386 | ctx = ucma_alloc_ctx(file); | |
387 | mutex_unlock(&file->mut); | |
388 | if (!ctx) | |
389 | return -ENOMEM; | |
390 | ||
391 | ctx->uid = cmd.uid; | |
392 | ctx->cm_id = rdma_create_id(ucma_event_handler, ctx, cmd.ps); | |
393 | if (IS_ERR(ctx->cm_id)) { | |
394 | ret = PTR_ERR(ctx->cm_id); | |
395 | goto err1; | |
396 | } | |
397 | ||
398 | resp.id = ctx->id; | |
399 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
400 | &resp, sizeof(resp))) { | |
401 | ret = -EFAULT; | |
402 | goto err2; | |
403 | } | |
404 | return 0; | |
405 | ||
406 | err2: | |
407 | rdma_destroy_id(ctx->cm_id); | |
408 | err1: | |
409 | mutex_lock(&mut); | |
410 | idr_remove(&ctx_idr, ctx->id); | |
411 | mutex_unlock(&mut); | |
412 | kfree(ctx); | |
413 | return ret; | |
414 | } | |
415 | ||
c8f6a362 SH |
416 | static void ucma_cleanup_multicast(struct ucma_context *ctx) |
417 | { | |
418 | struct ucma_multicast *mc, *tmp; | |
419 | ||
420 | mutex_lock(&mut); | |
421 | list_for_each_entry_safe(mc, tmp, &ctx->mc_list, list) { | |
422 | list_del(&mc->list); | |
423 | idr_remove(&multicast_idr, mc->id); | |
424 | kfree(mc); | |
425 | } | |
426 | mutex_unlock(&mut); | |
427 | } | |
428 | ||
75216638 SH |
429 | static void ucma_cleanup_events(struct ucma_context *ctx) |
430 | { | |
431 | struct ucma_event *uevent, *tmp; | |
432 | ||
433 | list_for_each_entry_safe(uevent, tmp, &ctx->file->event_list, list) { | |
434 | if (uevent->ctx != ctx) | |
435 | continue; | |
436 | ||
437 | list_del(&uevent->list); | |
438 | ||
439 | /* clear incoming connections. */ | |
440 | if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) | |
441 | rdma_destroy_id(uevent->cm_id); | |
442 | ||
443 | kfree(uevent); | |
444 | } | |
445 | } | |
446 | ||
c8f6a362 SH |
447 | static void ucma_cleanup_mc_events(struct ucma_multicast *mc) |
448 | { | |
449 | struct ucma_event *uevent, *tmp; | |
450 | ||
451 | list_for_each_entry_safe(uevent, tmp, &mc->ctx->file->event_list, list) { | |
452 | if (uevent->mc != mc) | |
453 | continue; | |
454 | ||
455 | list_del(&uevent->list); | |
456 | kfree(uevent); | |
457 | } | |
458 | } | |
459 | ||
75216638 SH |
460 | static int ucma_free_ctx(struct ucma_context *ctx) |
461 | { | |
462 | int events_reported; | |
463 | ||
464 | /* No new events will be generated after destroying the id. */ | |
465 | rdma_destroy_id(ctx->cm_id); | |
466 | ||
c8f6a362 SH |
467 | ucma_cleanup_multicast(ctx); |
468 | ||
75216638 SH |
469 | /* Cleanup events not yet reported to the user. */ |
470 | mutex_lock(&ctx->file->mut); | |
471 | ucma_cleanup_events(ctx); | |
472 | list_del(&ctx->list); | |
473 | mutex_unlock(&ctx->file->mut); | |
474 | ||
475 | events_reported = ctx->events_reported; | |
476 | kfree(ctx); | |
477 | return events_reported; | |
478 | } | |
479 | ||
480 | static ssize_t ucma_destroy_id(struct ucma_file *file, const char __user *inbuf, | |
481 | int in_len, int out_len) | |
482 | { | |
483 | struct rdma_ucm_destroy_id cmd; | |
484 | struct rdma_ucm_destroy_id_resp resp; | |
485 | struct ucma_context *ctx; | |
486 | int ret = 0; | |
487 | ||
488 | if (out_len < sizeof(resp)) | |
489 | return -ENOSPC; | |
490 | ||
491 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
492 | return -EFAULT; | |
493 | ||
494 | mutex_lock(&mut); | |
495 | ctx = _ucma_find_context(cmd.id, file); | |
496 | if (!IS_ERR(ctx)) | |
497 | idr_remove(&ctx_idr, ctx->id); | |
498 | mutex_unlock(&mut); | |
499 | ||
500 | if (IS_ERR(ctx)) | |
501 | return PTR_ERR(ctx); | |
502 | ||
503 | ucma_put_ctx(ctx); | |
504 | wait_for_completion(&ctx->comp); | |
505 | resp.events_reported = ucma_free_ctx(ctx); | |
506 | ||
507 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
508 | &resp, sizeof(resp))) | |
509 | ret = -EFAULT; | |
510 | ||
511 | return ret; | |
512 | } | |
513 | ||
514 | static ssize_t ucma_bind_addr(struct ucma_file *file, const char __user *inbuf, | |
515 | int in_len, int out_len) | |
516 | { | |
517 | struct rdma_ucm_bind_addr cmd; | |
518 | struct ucma_context *ctx; | |
519 | int ret; | |
520 | ||
521 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
522 | return -EFAULT; | |
523 | ||
524 | ctx = ucma_get_ctx(file, cmd.id); | |
525 | if (IS_ERR(ctx)) | |
526 | return PTR_ERR(ctx); | |
527 | ||
528 | ret = rdma_bind_addr(ctx->cm_id, (struct sockaddr *) &cmd.addr); | |
529 | ucma_put_ctx(ctx); | |
530 | return ret; | |
531 | } | |
532 | ||
533 | static ssize_t ucma_resolve_addr(struct ucma_file *file, | |
534 | const char __user *inbuf, | |
535 | int in_len, int out_len) | |
536 | { | |
537 | struct rdma_ucm_resolve_addr cmd; | |
538 | struct ucma_context *ctx; | |
539 | int ret; | |
540 | ||
541 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
542 | return -EFAULT; | |
543 | ||
544 | ctx = ucma_get_ctx(file, cmd.id); | |
545 | if (IS_ERR(ctx)) | |
546 | return PTR_ERR(ctx); | |
547 | ||
548 | ret = rdma_resolve_addr(ctx->cm_id, (struct sockaddr *) &cmd.src_addr, | |
549 | (struct sockaddr *) &cmd.dst_addr, | |
550 | cmd.timeout_ms); | |
551 | ucma_put_ctx(ctx); | |
552 | return ret; | |
553 | } | |
554 | ||
555 | static ssize_t ucma_resolve_route(struct ucma_file *file, | |
556 | const char __user *inbuf, | |
557 | int in_len, int out_len) | |
558 | { | |
559 | struct rdma_ucm_resolve_route 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_route(ctx->cm_id, cmd.timeout_ms); | |
571 | ucma_put_ctx(ctx); | |
572 | return ret; | |
573 | } | |
574 | ||
575 | static void ucma_copy_ib_route(struct rdma_ucm_query_route_resp *resp, | |
576 | struct rdma_route *route) | |
577 | { | |
578 | struct rdma_dev_addr *dev_addr; | |
579 | ||
580 | resp->num_paths = route->num_paths; | |
581 | switch (route->num_paths) { | |
582 | case 0: | |
583 | dev_addr = &route->addr.dev_addr; | |
6f8372b6 SH |
584 | rdma_addr_get_dgid(dev_addr, |
585 | (union ib_gid *) &resp->ib_route[0].dgid); | |
586 | rdma_addr_get_sgid(dev_addr, | |
587 | (union ib_gid *) &resp->ib_route[0].sgid); | |
75216638 SH |
588 | resp->ib_route[0].pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); |
589 | break; | |
590 | case 2: | |
591 | ib_copy_path_rec_to_user(&resp->ib_route[1], | |
592 | &route->path_rec[1]); | |
593 | /* fall through */ | |
594 | case 1: | |
595 | ib_copy_path_rec_to_user(&resp->ib_route[0], | |
596 | &route->path_rec[0]); | |
597 | break; | |
598 | default: | |
599 | break; | |
600 | } | |
601 | } | |
602 | ||
3c86aa70 EC |
603 | static void ucma_copy_iboe_route(struct rdma_ucm_query_route_resp *resp, |
604 | struct rdma_route *route) | |
605 | { | |
606 | struct rdma_dev_addr *dev_addr; | |
af7bd463 EC |
607 | struct net_device *dev; |
608 | u16 vid = 0; | |
3c86aa70 EC |
609 | |
610 | resp->num_paths = route->num_paths; | |
611 | switch (route->num_paths) { | |
612 | case 0: | |
613 | dev_addr = &route->addr.dev_addr; | |
af7bd463 EC |
614 | dev = dev_get_by_index(&init_net, dev_addr->bound_dev_if); |
615 | if (dev) { | |
616 | vid = rdma_vlan_dev_vlan_id(dev); | |
617 | dev_put(dev); | |
618 | } | |
619 | ||
620 | iboe_mac_vlan_to_ll((union ib_gid *) &resp->ib_route[0].dgid, | |
621 | dev_addr->dst_dev_addr, vid); | |
3c86aa70 EC |
622 | iboe_addr_get_sgid(dev_addr, |
623 | (union ib_gid *) &resp->ib_route[0].sgid); | |
624 | resp->ib_route[0].pkey = cpu_to_be16(0xffff); | |
625 | break; | |
626 | case 2: | |
627 | ib_copy_path_rec_to_user(&resp->ib_route[1], | |
628 | &route->path_rec[1]); | |
629 | /* fall through */ | |
630 | case 1: | |
631 | ib_copy_path_rec_to_user(&resp->ib_route[0], | |
632 | &route->path_rec[0]); | |
633 | break; | |
634 | default: | |
635 | break; | |
636 | } | |
637 | } | |
638 | ||
e86f8b06 SW |
639 | static void ucma_copy_iw_route(struct rdma_ucm_query_route_resp *resp, |
640 | struct rdma_route *route) | |
641 | { | |
642 | struct rdma_dev_addr *dev_addr; | |
643 | ||
644 | dev_addr = &route->addr.dev_addr; | |
645 | rdma_addr_get_dgid(dev_addr, (union ib_gid *) &resp->ib_route[0].dgid); | |
646 | rdma_addr_get_sgid(dev_addr, (union ib_gid *) &resp->ib_route[0].sgid); | |
647 | } | |
648 | ||
75216638 SH |
649 | static ssize_t ucma_query_route(struct ucma_file *file, |
650 | const char __user *inbuf, | |
651 | int in_len, int out_len) | |
652 | { | |
653 | struct rdma_ucm_query_route cmd; | |
654 | struct rdma_ucm_query_route_resp resp; | |
655 | struct ucma_context *ctx; | |
656 | struct sockaddr *addr; | |
657 | int ret = 0; | |
658 | ||
659 | if (out_len < sizeof(resp)) | |
660 | return -ENOSPC; | |
661 | ||
662 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
663 | return -EFAULT; | |
664 | ||
665 | ctx = ucma_get_ctx(file, cmd.id); | |
666 | if (IS_ERR(ctx)) | |
667 | return PTR_ERR(ctx); | |
668 | ||
669 | memset(&resp, 0, sizeof resp); | |
3f446754 | 670 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.src_addr; |
75216638 SH |
671 | memcpy(&resp.src_addr, addr, addr->sa_family == AF_INET ? |
672 | sizeof(struct sockaddr_in) : | |
673 | sizeof(struct sockaddr_in6)); | |
3f446754 | 674 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.dst_addr; |
75216638 SH |
675 | memcpy(&resp.dst_addr, addr, addr->sa_family == AF_INET ? |
676 | sizeof(struct sockaddr_in) : | |
677 | sizeof(struct sockaddr_in6)); | |
678 | if (!ctx->cm_id->device) | |
679 | goto out; | |
680 | ||
9cda779c | 681 | resp.node_guid = (__force __u64) ctx->cm_id->device->node_guid; |
75216638 | 682 | resp.port_num = ctx->cm_id->port_num; |
e86f8b06 SW |
683 | switch (rdma_node_get_transport(ctx->cm_id->device->node_type)) { |
684 | case RDMA_TRANSPORT_IB: | |
685 | switch (rdma_port_get_link_layer(ctx->cm_id->device, | |
686 | ctx->cm_id->port_num)) { | |
3c86aa70 EC |
687 | case IB_LINK_LAYER_INFINIBAND: |
688 | ucma_copy_ib_route(&resp, &ctx->cm_id->route); | |
689 | break; | |
690 | case IB_LINK_LAYER_ETHERNET: | |
691 | ucma_copy_iboe_route(&resp, &ctx->cm_id->route); | |
692 | break; | |
693 | default: | |
694 | break; | |
695 | } | |
e86f8b06 SW |
696 | break; |
697 | case RDMA_TRANSPORT_IWARP: | |
698 | ucma_copy_iw_route(&resp, &ctx->cm_id->route); | |
699 | break; | |
700 | default: | |
701 | break; | |
75216638 SH |
702 | } |
703 | ||
704 | out: | |
705 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
706 | &resp, sizeof(resp))) | |
707 | ret = -EFAULT; | |
708 | ||
709 | ucma_put_ctx(ctx); | |
710 | return ret; | |
711 | } | |
712 | ||
713 | static void ucma_copy_conn_param(struct rdma_conn_param *dst, | |
714 | struct rdma_ucm_conn_param *src) | |
715 | { | |
716 | dst->private_data = src->private_data; | |
717 | dst->private_data_len = src->private_data_len; | |
718 | dst->responder_resources =src->responder_resources; | |
719 | dst->initiator_depth = src->initiator_depth; | |
720 | dst->flow_control = src->flow_control; | |
721 | dst->retry_count = src->retry_count; | |
722 | dst->rnr_retry_count = src->rnr_retry_count; | |
723 | dst->srq = src->srq; | |
724 | dst->qp_num = src->qp_num; | |
725 | } | |
726 | ||
727 | static ssize_t ucma_connect(struct ucma_file *file, const char __user *inbuf, | |
728 | int in_len, int out_len) | |
729 | { | |
730 | struct rdma_ucm_connect cmd; | |
731 | struct rdma_conn_param conn_param; | |
732 | struct ucma_context *ctx; | |
733 | int ret; | |
734 | ||
735 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
736 | return -EFAULT; | |
737 | ||
738 | if (!cmd.conn_param.valid) | |
739 | return -EINVAL; | |
740 | ||
741 | ctx = ucma_get_ctx(file, cmd.id); | |
742 | if (IS_ERR(ctx)) | |
743 | return PTR_ERR(ctx); | |
744 | ||
745 | ucma_copy_conn_param(&conn_param, &cmd.conn_param); | |
746 | ret = rdma_connect(ctx->cm_id, &conn_param); | |
747 | ucma_put_ctx(ctx); | |
748 | return ret; | |
749 | } | |
750 | ||
751 | static ssize_t ucma_listen(struct ucma_file *file, const char __user *inbuf, | |
752 | int in_len, int out_len) | |
753 | { | |
754 | struct rdma_ucm_listen cmd; | |
755 | struct ucma_context *ctx; | |
756 | int ret; | |
757 | ||
758 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
759 | return -EFAULT; | |
760 | ||
761 | ctx = ucma_get_ctx(file, cmd.id); | |
762 | if (IS_ERR(ctx)) | |
763 | return PTR_ERR(ctx); | |
764 | ||
97cb7e40 SW |
765 | ctx->backlog = cmd.backlog > 0 && cmd.backlog < max_backlog ? |
766 | cmd.backlog : max_backlog; | |
75216638 SH |
767 | ret = rdma_listen(ctx->cm_id, ctx->backlog); |
768 | ucma_put_ctx(ctx); | |
769 | return ret; | |
770 | } | |
771 | ||
772 | static ssize_t ucma_accept(struct ucma_file *file, const char __user *inbuf, | |
773 | int in_len, int out_len) | |
774 | { | |
775 | struct rdma_ucm_accept cmd; | |
776 | struct rdma_conn_param conn_param; | |
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 | ||
787 | if (cmd.conn_param.valid) { | |
788 | ctx->uid = cmd.uid; | |
789 | ucma_copy_conn_param(&conn_param, &cmd.conn_param); | |
790 | ret = rdma_accept(ctx->cm_id, &conn_param); | |
791 | } else | |
792 | ret = rdma_accept(ctx->cm_id, NULL); | |
793 | ||
794 | ucma_put_ctx(ctx); | |
795 | return ret; | |
796 | } | |
797 | ||
798 | static ssize_t ucma_reject(struct ucma_file *file, const char __user *inbuf, | |
799 | int in_len, int out_len) | |
800 | { | |
801 | struct rdma_ucm_reject cmd; | |
802 | struct ucma_context *ctx; | |
803 | int ret; | |
804 | ||
805 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
806 | return -EFAULT; | |
807 | ||
808 | ctx = ucma_get_ctx(file, cmd.id); | |
809 | if (IS_ERR(ctx)) | |
810 | return PTR_ERR(ctx); | |
811 | ||
812 | ret = rdma_reject(ctx->cm_id, cmd.private_data, cmd.private_data_len); | |
813 | ucma_put_ctx(ctx); | |
814 | return ret; | |
815 | } | |
816 | ||
817 | static ssize_t ucma_disconnect(struct ucma_file *file, const char __user *inbuf, | |
818 | int in_len, int out_len) | |
819 | { | |
820 | struct rdma_ucm_disconnect cmd; | |
821 | struct ucma_context *ctx; | |
822 | int ret; | |
823 | ||
824 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
825 | return -EFAULT; | |
826 | ||
827 | ctx = ucma_get_ctx(file, cmd.id); | |
828 | if (IS_ERR(ctx)) | |
829 | return PTR_ERR(ctx); | |
830 | ||
831 | ret = rdma_disconnect(ctx->cm_id); | |
832 | ucma_put_ctx(ctx); | |
833 | return ret; | |
834 | } | |
835 | ||
836 | static ssize_t ucma_init_qp_attr(struct ucma_file *file, | |
837 | const char __user *inbuf, | |
838 | int in_len, int out_len) | |
839 | { | |
840 | struct rdma_ucm_init_qp_attr cmd; | |
841 | struct ib_uverbs_qp_attr resp; | |
842 | struct ucma_context *ctx; | |
843 | struct ib_qp_attr qp_attr; | |
844 | int ret; | |
845 | ||
846 | if (out_len < sizeof(resp)) | |
847 | return -ENOSPC; | |
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 | resp.qp_attr_mask = 0; | |
857 | memset(&qp_attr, 0, sizeof qp_attr); | |
858 | qp_attr.qp_state = cmd.qp_state; | |
859 | ret = rdma_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask); | |
860 | if (ret) | |
861 | goto out; | |
862 | ||
863 | ib_copy_qp_attr_to_user(&resp, &qp_attr); | |
864 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
865 | &resp, sizeof(resp))) | |
866 | ret = -EFAULT; | |
867 | ||
868 | out: | |
869 | ucma_put_ctx(ctx); | |
870 | return ret; | |
871 | } | |
872 | ||
7ce86409 SH |
873 | static int ucma_set_option_id(struct ucma_context *ctx, int optname, |
874 | void *optval, size_t optlen) | |
875 | { | |
876 | int ret = 0; | |
877 | ||
878 | switch (optname) { | |
879 | case RDMA_OPTION_ID_TOS: | |
880 | if (optlen != sizeof(u8)) { | |
881 | ret = -EINVAL; | |
882 | break; | |
883 | } | |
884 | rdma_set_service_type(ctx->cm_id, *((u8 *) optval)); | |
885 | break; | |
886 | default: | |
887 | ret = -ENOSYS; | |
888 | } | |
889 | ||
890 | return ret; | |
891 | } | |
892 | ||
a7ca1f00 SH |
893 | static int ucma_set_ib_path(struct ucma_context *ctx, |
894 | struct ib_path_rec_data *path_data, size_t optlen) | |
895 | { | |
896 | struct ib_sa_path_rec sa_path; | |
897 | struct rdma_cm_event event; | |
898 | int ret; | |
899 | ||
900 | if (optlen % sizeof(*path_data)) | |
901 | return -EINVAL; | |
902 | ||
903 | for (; optlen; optlen -= sizeof(*path_data), path_data++) { | |
904 | if (path_data->flags == (IB_PATH_GMP | IB_PATH_PRIMARY | | |
905 | IB_PATH_BIDIRECTIONAL)) | |
906 | break; | |
907 | } | |
908 | ||
909 | if (!optlen) | |
910 | return -EINVAL; | |
911 | ||
912 | ib_sa_unpack_path(path_data->path_rec, &sa_path); | |
913 | ret = rdma_set_ib_paths(ctx->cm_id, &sa_path, 1); | |
914 | if (ret) | |
915 | return ret; | |
916 | ||
917 | memset(&event, 0, sizeof event); | |
918 | event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; | |
919 | return ucma_event_handler(ctx->cm_id, &event); | |
920 | } | |
921 | ||
922 | static int ucma_set_option_ib(struct ucma_context *ctx, int optname, | |
923 | void *optval, size_t optlen) | |
924 | { | |
925 | int ret; | |
926 | ||
927 | switch (optname) { | |
928 | case RDMA_OPTION_IB_PATH: | |
929 | ret = ucma_set_ib_path(ctx, optval, optlen); | |
930 | break; | |
931 | default: | |
932 | ret = -ENOSYS; | |
933 | } | |
934 | ||
935 | return ret; | |
936 | } | |
937 | ||
7ce86409 SH |
938 | static int ucma_set_option_level(struct ucma_context *ctx, int level, |
939 | int optname, void *optval, size_t optlen) | |
940 | { | |
941 | int ret; | |
942 | ||
943 | switch (level) { | |
944 | case RDMA_OPTION_ID: | |
945 | ret = ucma_set_option_id(ctx, optname, optval, optlen); | |
946 | break; | |
a7ca1f00 SH |
947 | case RDMA_OPTION_IB: |
948 | ret = ucma_set_option_ib(ctx, optname, optval, optlen); | |
949 | break; | |
7ce86409 SH |
950 | default: |
951 | ret = -ENOSYS; | |
952 | } | |
953 | ||
954 | return ret; | |
955 | } | |
956 | ||
957 | static ssize_t ucma_set_option(struct ucma_file *file, const char __user *inbuf, | |
958 | int in_len, int out_len) | |
959 | { | |
960 | struct rdma_ucm_set_option cmd; | |
961 | struct ucma_context *ctx; | |
962 | void *optval; | |
963 | int ret; | |
964 | ||
965 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
966 | return -EFAULT; | |
967 | ||
968 | ctx = ucma_get_ctx(file, cmd.id); | |
969 | if (IS_ERR(ctx)) | |
970 | return PTR_ERR(ctx); | |
971 | ||
972 | optval = kmalloc(cmd.optlen, GFP_KERNEL); | |
973 | if (!optval) { | |
974 | ret = -ENOMEM; | |
975 | goto out1; | |
976 | } | |
977 | ||
978 | if (copy_from_user(optval, (void __user *) (unsigned long) cmd.optval, | |
979 | cmd.optlen)) { | |
980 | ret = -EFAULT; | |
981 | goto out2; | |
982 | } | |
983 | ||
984 | ret = ucma_set_option_level(ctx, cmd.level, cmd.optname, optval, | |
985 | cmd.optlen); | |
986 | out2: | |
987 | kfree(optval); | |
988 | out1: | |
989 | ucma_put_ctx(ctx); | |
990 | return ret; | |
991 | } | |
992 | ||
75216638 SH |
993 | static ssize_t ucma_notify(struct ucma_file *file, const char __user *inbuf, |
994 | int in_len, int out_len) | |
995 | { | |
996 | struct rdma_ucm_notify cmd; | |
997 | struct ucma_context *ctx; | |
998 | int ret; | |
999 | ||
1000 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1001 | return -EFAULT; | |
1002 | ||
1003 | ctx = ucma_get_ctx(file, cmd.id); | |
1004 | if (IS_ERR(ctx)) | |
1005 | return PTR_ERR(ctx); | |
1006 | ||
1007 | ret = rdma_notify(ctx->cm_id, (enum ib_event_type) cmd.event); | |
1008 | ucma_put_ctx(ctx); | |
1009 | return ret; | |
1010 | } | |
1011 | ||
c8f6a362 SH |
1012 | static ssize_t ucma_join_multicast(struct ucma_file *file, |
1013 | const char __user *inbuf, | |
1014 | int in_len, int out_len) | |
1015 | { | |
1016 | struct rdma_ucm_join_mcast cmd; | |
1017 | struct rdma_ucm_create_id_resp resp; | |
1018 | struct ucma_context *ctx; | |
1019 | struct ucma_multicast *mc; | |
1020 | int ret; | |
1021 | ||
1022 | if (out_len < sizeof(resp)) | |
1023 | return -ENOSPC; | |
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 | mutex_lock(&file->mut); | |
1033 | mc = ucma_alloc_multicast(ctx); | |
6aea938f JB |
1034 | if (!mc) { |
1035 | ret = -ENOMEM; | |
c8f6a362 SH |
1036 | goto err1; |
1037 | } | |
1038 | ||
1039 | mc->uid = cmd.uid; | |
1040 | memcpy(&mc->addr, &cmd.addr, sizeof cmd.addr); | |
3f446754 | 1041 | ret = rdma_join_multicast(ctx->cm_id, (struct sockaddr *) &mc->addr, mc); |
c8f6a362 SH |
1042 | if (ret) |
1043 | goto err2; | |
1044 | ||
1045 | resp.id = mc->id; | |
1046 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
1047 | &resp, sizeof(resp))) { | |
1048 | ret = -EFAULT; | |
1049 | goto err3; | |
1050 | } | |
1051 | ||
1052 | mutex_unlock(&file->mut); | |
1053 | ucma_put_ctx(ctx); | |
1054 | return 0; | |
1055 | ||
1056 | err3: | |
3f446754 | 1057 | rdma_leave_multicast(ctx->cm_id, (struct sockaddr *) &mc->addr); |
c8f6a362 SH |
1058 | ucma_cleanup_mc_events(mc); |
1059 | err2: | |
1060 | mutex_lock(&mut); | |
1061 | idr_remove(&multicast_idr, mc->id); | |
1062 | mutex_unlock(&mut); | |
1063 | list_del(&mc->list); | |
1064 | kfree(mc); | |
1065 | err1: | |
1066 | mutex_unlock(&file->mut); | |
1067 | ucma_put_ctx(ctx); | |
1068 | return ret; | |
1069 | } | |
1070 | ||
1071 | static ssize_t ucma_leave_multicast(struct ucma_file *file, | |
1072 | const char __user *inbuf, | |
1073 | int in_len, int out_len) | |
1074 | { | |
1075 | struct rdma_ucm_destroy_id cmd; | |
1076 | struct rdma_ucm_destroy_id_resp resp; | |
1077 | struct ucma_multicast *mc; | |
1078 | int ret = 0; | |
1079 | ||
1080 | if (out_len < sizeof(resp)) | |
1081 | return -ENOSPC; | |
1082 | ||
1083 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1084 | return -EFAULT; | |
1085 | ||
1086 | mutex_lock(&mut); | |
1087 | mc = idr_find(&multicast_idr, cmd.id); | |
1088 | if (!mc) | |
1089 | mc = ERR_PTR(-ENOENT); | |
1090 | else if (mc->ctx->file != file) | |
1091 | mc = ERR_PTR(-EINVAL); | |
1092 | else { | |
1093 | idr_remove(&multicast_idr, mc->id); | |
1094 | atomic_inc(&mc->ctx->ref); | |
1095 | } | |
1096 | mutex_unlock(&mut); | |
1097 | ||
1098 | if (IS_ERR(mc)) { | |
1099 | ret = PTR_ERR(mc); | |
1100 | goto out; | |
1101 | } | |
1102 | ||
3f446754 | 1103 | rdma_leave_multicast(mc->ctx->cm_id, (struct sockaddr *) &mc->addr); |
c8f6a362 SH |
1104 | mutex_lock(&mc->ctx->file->mut); |
1105 | ucma_cleanup_mc_events(mc); | |
1106 | list_del(&mc->list); | |
1107 | mutex_unlock(&mc->ctx->file->mut); | |
1108 | ||
1109 | ucma_put_ctx(mc->ctx); | |
1110 | resp.events_reported = mc->events_reported; | |
1111 | kfree(mc); | |
1112 | ||
1113 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
1114 | &resp, sizeof(resp))) | |
1115 | ret = -EFAULT; | |
1116 | out: | |
1117 | return ret; | |
1118 | } | |
1119 | ||
88314e4d SH |
1120 | static void ucma_lock_files(struct ucma_file *file1, struct ucma_file *file2) |
1121 | { | |
1122 | /* Acquire mutex's based on pointer comparison to prevent deadlock. */ | |
1123 | if (file1 < file2) { | |
1124 | mutex_lock(&file1->mut); | |
1125 | mutex_lock(&file2->mut); | |
1126 | } else { | |
1127 | mutex_lock(&file2->mut); | |
1128 | mutex_lock(&file1->mut); | |
1129 | } | |
1130 | } | |
1131 | ||
1132 | static void ucma_unlock_files(struct ucma_file *file1, struct ucma_file *file2) | |
1133 | { | |
1134 | if (file1 < file2) { | |
1135 | mutex_unlock(&file2->mut); | |
1136 | mutex_unlock(&file1->mut); | |
1137 | } else { | |
1138 | mutex_unlock(&file1->mut); | |
1139 | mutex_unlock(&file2->mut); | |
1140 | } | |
1141 | } | |
1142 | ||
1143 | static void ucma_move_events(struct ucma_context *ctx, struct ucma_file *file) | |
1144 | { | |
1145 | struct ucma_event *uevent, *tmp; | |
1146 | ||
1147 | list_for_each_entry_safe(uevent, tmp, &ctx->file->event_list, list) | |
1148 | if (uevent->ctx == ctx) | |
1149 | list_move_tail(&uevent->list, &file->event_list); | |
1150 | } | |
1151 | ||
1152 | static ssize_t ucma_migrate_id(struct ucma_file *new_file, | |
1153 | const char __user *inbuf, | |
1154 | int in_len, int out_len) | |
1155 | { | |
1156 | struct rdma_ucm_migrate_id cmd; | |
1157 | struct rdma_ucm_migrate_resp resp; | |
1158 | struct ucma_context *ctx; | |
1159 | struct file *filp; | |
1160 | struct ucma_file *cur_file; | |
1161 | int ret = 0; | |
1162 | ||
1163 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1164 | return -EFAULT; | |
1165 | ||
1166 | /* Get current fd to protect against it being closed */ | |
1167 | filp = fget(cmd.fd); | |
1168 | if (!filp) | |
1169 | return -ENOENT; | |
1170 | ||
1171 | /* Validate current fd and prevent destruction of id. */ | |
1172 | ctx = ucma_get_ctx(filp->private_data, cmd.id); | |
1173 | if (IS_ERR(ctx)) { | |
1174 | ret = PTR_ERR(ctx); | |
1175 | goto file_put; | |
1176 | } | |
1177 | ||
1178 | cur_file = ctx->file; | |
1179 | if (cur_file == new_file) { | |
1180 | resp.events_reported = ctx->events_reported; | |
1181 | goto response; | |
1182 | } | |
1183 | ||
1184 | /* | |
1185 | * Migrate events between fd's, maintaining order, and avoiding new | |
1186 | * events being added before existing events. | |
1187 | */ | |
1188 | ucma_lock_files(cur_file, new_file); | |
1189 | mutex_lock(&mut); | |
1190 | ||
1191 | list_move_tail(&ctx->list, &new_file->ctx_list); | |
1192 | ucma_move_events(ctx, new_file); | |
1193 | ctx->file = new_file; | |
1194 | resp.events_reported = ctx->events_reported; | |
1195 | ||
1196 | mutex_unlock(&mut); | |
1197 | ucma_unlock_files(cur_file, new_file); | |
1198 | ||
1199 | response: | |
1200 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
1201 | &resp, sizeof(resp))) | |
1202 | ret = -EFAULT; | |
1203 | ||
1204 | ucma_put_ctx(ctx); | |
1205 | file_put: | |
1206 | fput(filp); | |
1207 | return ret; | |
1208 | } | |
1209 | ||
75216638 SH |
1210 | static ssize_t (*ucma_cmd_table[])(struct ucma_file *file, |
1211 | const char __user *inbuf, | |
1212 | int in_len, int out_len) = { | |
1213 | [RDMA_USER_CM_CMD_CREATE_ID] = ucma_create_id, | |
1214 | [RDMA_USER_CM_CMD_DESTROY_ID] = ucma_destroy_id, | |
1215 | [RDMA_USER_CM_CMD_BIND_ADDR] = ucma_bind_addr, | |
1216 | [RDMA_USER_CM_CMD_RESOLVE_ADDR] = ucma_resolve_addr, | |
1217 | [RDMA_USER_CM_CMD_RESOLVE_ROUTE]= ucma_resolve_route, | |
1218 | [RDMA_USER_CM_CMD_QUERY_ROUTE] = ucma_query_route, | |
1219 | [RDMA_USER_CM_CMD_CONNECT] = ucma_connect, | |
1220 | [RDMA_USER_CM_CMD_LISTEN] = ucma_listen, | |
1221 | [RDMA_USER_CM_CMD_ACCEPT] = ucma_accept, | |
1222 | [RDMA_USER_CM_CMD_REJECT] = ucma_reject, | |
1223 | [RDMA_USER_CM_CMD_DISCONNECT] = ucma_disconnect, | |
1224 | [RDMA_USER_CM_CMD_INIT_QP_ATTR] = ucma_init_qp_attr, | |
1225 | [RDMA_USER_CM_CMD_GET_EVENT] = ucma_get_event, | |
1226 | [RDMA_USER_CM_CMD_GET_OPTION] = NULL, | |
7ce86409 | 1227 | [RDMA_USER_CM_CMD_SET_OPTION] = ucma_set_option, |
75216638 | 1228 | [RDMA_USER_CM_CMD_NOTIFY] = ucma_notify, |
c8f6a362 SH |
1229 | [RDMA_USER_CM_CMD_JOIN_MCAST] = ucma_join_multicast, |
1230 | [RDMA_USER_CM_CMD_LEAVE_MCAST] = ucma_leave_multicast, | |
88314e4d | 1231 | [RDMA_USER_CM_CMD_MIGRATE_ID] = ucma_migrate_id |
75216638 SH |
1232 | }; |
1233 | ||
1234 | static ssize_t ucma_write(struct file *filp, const char __user *buf, | |
1235 | size_t len, loff_t *pos) | |
1236 | { | |
1237 | struct ucma_file *file = filp->private_data; | |
1238 | struct rdma_ucm_cmd_hdr hdr; | |
1239 | ssize_t ret; | |
1240 | ||
1241 | if (len < sizeof(hdr)) | |
1242 | return -EINVAL; | |
1243 | ||
1244 | if (copy_from_user(&hdr, buf, sizeof(hdr))) | |
1245 | return -EFAULT; | |
1246 | ||
1247 | if (hdr.cmd < 0 || hdr.cmd >= ARRAY_SIZE(ucma_cmd_table)) | |
1248 | return -EINVAL; | |
1249 | ||
1250 | if (hdr.in + sizeof(hdr) > len) | |
1251 | return -EINVAL; | |
1252 | ||
1253 | if (!ucma_cmd_table[hdr.cmd]) | |
1254 | return -ENOSYS; | |
1255 | ||
1256 | ret = ucma_cmd_table[hdr.cmd](file, buf + sizeof(hdr), hdr.in, hdr.out); | |
1257 | if (!ret) | |
1258 | ret = len; | |
1259 | ||
1260 | return ret; | |
1261 | } | |
1262 | ||
1263 | static unsigned int ucma_poll(struct file *filp, struct poll_table_struct *wait) | |
1264 | { | |
1265 | struct ucma_file *file = filp->private_data; | |
1266 | unsigned int mask = 0; | |
1267 | ||
1268 | poll_wait(filp, &file->poll_wait, wait); | |
1269 | ||
1270 | if (!list_empty(&file->event_list)) | |
1271 | mask = POLLIN | POLLRDNORM; | |
1272 | ||
1273 | return mask; | |
1274 | } | |
1275 | ||
f7a6117e RD |
1276 | /* |
1277 | * ucma_open() does not need the BKL: | |
1278 | * | |
1279 | * - no global state is referred to; | |
1280 | * - there is no ioctl method to race against; | |
1281 | * - no further module initialization is required for open to work | |
1282 | * after the device is registered. | |
1283 | */ | |
75216638 SH |
1284 | static int ucma_open(struct inode *inode, struct file *filp) |
1285 | { | |
1286 | struct ucma_file *file; | |
1287 | ||
1288 | file = kmalloc(sizeof *file, GFP_KERNEL); | |
1289 | if (!file) | |
1290 | return -ENOMEM; | |
1291 | ||
1292 | INIT_LIST_HEAD(&file->event_list); | |
1293 | INIT_LIST_HEAD(&file->ctx_list); | |
1294 | init_waitqueue_head(&file->poll_wait); | |
1295 | mutex_init(&file->mut); | |
1296 | ||
1297 | filp->private_data = file; | |
1298 | file->filp = filp; | |
bc1db9af RD |
1299 | |
1300 | return nonseekable_open(inode, filp); | |
75216638 SH |
1301 | } |
1302 | ||
1303 | static int ucma_close(struct inode *inode, struct file *filp) | |
1304 | { | |
1305 | struct ucma_file *file = filp->private_data; | |
1306 | struct ucma_context *ctx, *tmp; | |
1307 | ||
1308 | mutex_lock(&file->mut); | |
1309 | list_for_each_entry_safe(ctx, tmp, &file->ctx_list, list) { | |
1310 | mutex_unlock(&file->mut); | |
1311 | ||
1312 | mutex_lock(&mut); | |
1313 | idr_remove(&ctx_idr, ctx->id); | |
1314 | mutex_unlock(&mut); | |
1315 | ||
1316 | ucma_free_ctx(ctx); | |
1317 | mutex_lock(&file->mut); | |
1318 | } | |
1319 | mutex_unlock(&file->mut); | |
1320 | kfree(file); | |
1321 | return 0; | |
1322 | } | |
1323 | ||
2b8693c0 | 1324 | static const struct file_operations ucma_fops = { |
75216638 SH |
1325 | .owner = THIS_MODULE, |
1326 | .open = ucma_open, | |
1327 | .release = ucma_close, | |
1328 | .write = ucma_write, | |
1329 | .poll = ucma_poll, | |
bc1db9af | 1330 | .llseek = no_llseek, |
75216638 SH |
1331 | }; |
1332 | ||
1333 | static struct miscdevice ucma_misc = { | |
1334 | .minor = MISC_DYNAMIC_MINOR, | |
1335 | .name = "rdma_cm", | |
1336 | .fops = &ucma_fops, | |
1337 | }; | |
1338 | ||
1339 | static ssize_t show_abi_version(struct device *dev, | |
1340 | struct device_attribute *attr, | |
1341 | char *buf) | |
1342 | { | |
1343 | return sprintf(buf, "%d\n", RDMA_USER_CM_ABI_VERSION); | |
1344 | } | |
1345 | static DEVICE_ATTR(abi_version, S_IRUGO, show_abi_version, NULL); | |
1346 | ||
1347 | static int __init ucma_init(void) | |
1348 | { | |
1349 | int ret; | |
1350 | ||
1351 | ret = misc_register(&ucma_misc); | |
1352 | if (ret) | |
1353 | return ret; | |
1354 | ||
1355 | ret = device_create_file(ucma_misc.this_device, &dev_attr_abi_version); | |
1356 | if (ret) { | |
1357 | printk(KERN_ERR "rdma_ucm: couldn't create abi_version attr\n"); | |
97cb7e40 SW |
1358 | goto err1; |
1359 | } | |
1360 | ||
1361 | ucma_ctl_table_hdr = register_sysctl_paths(ucma_ctl_path, ucma_ctl_table); | |
1362 | if (!ucma_ctl_table_hdr) { | |
1363 | printk(KERN_ERR "rdma_ucm: couldn't register sysctl paths\n"); | |
1364 | ret = -ENOMEM; | |
1365 | goto err2; | |
75216638 SH |
1366 | } |
1367 | return 0; | |
97cb7e40 SW |
1368 | err2: |
1369 | device_remove_file(ucma_misc.this_device, &dev_attr_abi_version); | |
1370 | err1: | |
75216638 SH |
1371 | misc_deregister(&ucma_misc); |
1372 | return ret; | |
1373 | } | |
1374 | ||
1375 | static void __exit ucma_cleanup(void) | |
1376 | { | |
97cb7e40 | 1377 | unregister_sysctl_table(ucma_ctl_table_hdr); |
75216638 SH |
1378 | device_remove_file(ucma_misc.this_device, &dev_attr_abi_version); |
1379 | misc_deregister(&ucma_misc); | |
1380 | idr_destroy(&ctx_idr); | |
1381 | } | |
1382 | ||
1383 | module_init(ucma_init); | |
1384 | module_exit(ucma_cleanup); |