]>
Commit | Line | Data |
---|---|---|
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> |
75216638 SH |
43 | |
44 | #include <rdma/rdma_user_cm.h> | |
45 | #include <rdma/ib_marshall.h> | |
46 | #include <rdma/rdma_cm.h> | |
a7ca1f00 | 47 | #include <rdma/rdma_cm_ib.h> |
75216638 SH |
48 | |
49 | MODULE_AUTHOR("Sean Hefty"); | |
50 | MODULE_DESCRIPTION("RDMA Userspace Connection Manager Access"); | |
51 | MODULE_LICENSE("Dual BSD/GPL"); | |
52 | ||
53 | enum { | |
54 | UCMA_MAX_BACKLOG = 128 | |
55 | }; | |
56 | ||
57 | struct ucma_file { | |
58 | struct mutex mut; | |
59 | struct file *filp; | |
60 | struct list_head ctx_list; | |
61 | struct list_head event_list; | |
62 | wait_queue_head_t poll_wait; | |
63 | }; | |
64 | ||
65 | struct ucma_context { | |
66 | int id; | |
67 | struct completion comp; | |
68 | atomic_t ref; | |
69 | int events_reported; | |
70 | int backlog; | |
71 | ||
72 | struct ucma_file *file; | |
73 | struct rdma_cm_id *cm_id; | |
74 | u64 uid; | |
75 | ||
76 | struct list_head list; | |
c8f6a362 SH |
77 | struct list_head mc_list; |
78 | }; | |
79 | ||
80 | struct ucma_multicast { | |
81 | struct ucma_context *ctx; | |
82 | int id; | |
83 | int events_reported; | |
84 | ||
85 | u64 uid; | |
86 | struct list_head list; | |
3f446754 | 87 | struct sockaddr_storage addr; |
75216638 SH |
88 | }; |
89 | ||
90 | struct ucma_event { | |
91 | struct ucma_context *ctx; | |
c8f6a362 | 92 | struct ucma_multicast *mc; |
75216638 SH |
93 | struct list_head list; |
94 | struct rdma_cm_id *cm_id; | |
95 | struct rdma_ucm_event_resp resp; | |
96 | }; | |
97 | ||
98 | static DEFINE_MUTEX(mut); | |
99 | static DEFINE_IDR(ctx_idr); | |
c8f6a362 | 100 | static DEFINE_IDR(multicast_idr); |
75216638 SH |
101 | |
102 | static inline struct ucma_context *_ucma_find_context(int id, | |
103 | struct ucma_file *file) | |
104 | { | |
105 | struct ucma_context *ctx; | |
106 | ||
107 | ctx = idr_find(&ctx_idr, id); | |
108 | if (!ctx) | |
109 | ctx = ERR_PTR(-ENOENT); | |
110 | else if (ctx->file != file) | |
111 | ctx = ERR_PTR(-EINVAL); | |
112 | return ctx; | |
113 | } | |
114 | ||
115 | static struct ucma_context *ucma_get_ctx(struct ucma_file *file, int id) | |
116 | { | |
117 | struct ucma_context *ctx; | |
118 | ||
119 | mutex_lock(&mut); | |
120 | ctx = _ucma_find_context(id, file); | |
121 | if (!IS_ERR(ctx)) | |
122 | atomic_inc(&ctx->ref); | |
123 | mutex_unlock(&mut); | |
124 | return ctx; | |
125 | } | |
126 | ||
127 | static void ucma_put_ctx(struct ucma_context *ctx) | |
128 | { | |
129 | if (atomic_dec_and_test(&ctx->ref)) | |
130 | complete(&ctx->comp); | |
131 | } | |
132 | ||
133 | static struct ucma_context *ucma_alloc_ctx(struct ucma_file *file) | |
134 | { | |
135 | struct ucma_context *ctx; | |
136 | int ret; | |
137 | ||
138 | ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); | |
139 | if (!ctx) | |
140 | return NULL; | |
141 | ||
142 | atomic_set(&ctx->ref, 1); | |
143 | init_completion(&ctx->comp); | |
c8f6a362 | 144 | INIT_LIST_HEAD(&ctx->mc_list); |
75216638 SH |
145 | ctx->file = file; |
146 | ||
147 | do { | |
148 | ret = idr_pre_get(&ctx_idr, GFP_KERNEL); | |
149 | if (!ret) | |
150 | goto error; | |
151 | ||
152 | mutex_lock(&mut); | |
153 | ret = idr_get_new(&ctx_idr, ctx, &ctx->id); | |
154 | mutex_unlock(&mut); | |
155 | } while (ret == -EAGAIN); | |
156 | ||
157 | if (ret) | |
158 | goto error; | |
159 | ||
160 | list_add_tail(&ctx->list, &file->ctx_list); | |
161 | return ctx; | |
162 | ||
163 | error: | |
164 | kfree(ctx); | |
165 | return NULL; | |
166 | } | |
167 | ||
c8f6a362 SH |
168 | static struct ucma_multicast* ucma_alloc_multicast(struct ucma_context *ctx) |
169 | { | |
170 | struct ucma_multicast *mc; | |
171 | int ret; | |
172 | ||
173 | mc = kzalloc(sizeof(*mc), GFP_KERNEL); | |
174 | if (!mc) | |
175 | return NULL; | |
176 | ||
177 | do { | |
178 | ret = idr_pre_get(&multicast_idr, GFP_KERNEL); | |
179 | if (!ret) | |
180 | goto error; | |
181 | ||
182 | mutex_lock(&mut); | |
183 | ret = idr_get_new(&multicast_idr, mc, &mc->id); | |
184 | mutex_unlock(&mut); | |
185 | } while (ret == -EAGAIN); | |
186 | ||
187 | if (ret) | |
188 | goto error; | |
189 | ||
190 | mc->ctx = ctx; | |
191 | list_add_tail(&mc->list, &ctx->mc_list); | |
192 | return mc; | |
193 | ||
194 | error: | |
195 | kfree(mc); | |
196 | return NULL; | |
197 | } | |
198 | ||
75216638 SH |
199 | static void ucma_copy_conn_event(struct rdma_ucm_conn_param *dst, |
200 | struct rdma_conn_param *src) | |
201 | { | |
202 | if (src->private_data_len) | |
203 | memcpy(dst->private_data, src->private_data, | |
204 | src->private_data_len); | |
205 | dst->private_data_len = src->private_data_len; | |
206 | dst->responder_resources =src->responder_resources; | |
207 | dst->initiator_depth = src->initiator_depth; | |
208 | dst->flow_control = src->flow_control; | |
209 | dst->retry_count = src->retry_count; | |
210 | dst->rnr_retry_count = src->rnr_retry_count; | |
211 | dst->srq = src->srq; | |
212 | dst->qp_num = src->qp_num; | |
213 | } | |
214 | ||
215 | static void ucma_copy_ud_event(struct rdma_ucm_ud_param *dst, | |
216 | struct rdma_ud_param *src) | |
217 | { | |
218 | if (src->private_data_len) | |
219 | memcpy(dst->private_data, src->private_data, | |
220 | src->private_data_len); | |
221 | dst->private_data_len = src->private_data_len; | |
222 | ib_copy_ah_attr_to_user(&dst->ah_attr, &src->ah_attr); | |
223 | dst->qp_num = src->qp_num; | |
224 | dst->qkey = src->qkey; | |
225 | } | |
226 | ||
227 | static void ucma_set_event_context(struct ucma_context *ctx, | |
228 | struct rdma_cm_event *event, | |
229 | struct ucma_event *uevent) | |
230 | { | |
231 | uevent->ctx = ctx; | |
c8f6a362 SH |
232 | switch (event->event) { |
233 | case RDMA_CM_EVENT_MULTICAST_JOIN: | |
234 | case RDMA_CM_EVENT_MULTICAST_ERROR: | |
235 | uevent->mc = (struct ucma_multicast *) | |
236 | event->param.ud.private_data; | |
237 | uevent->resp.uid = uevent->mc->uid; | |
238 | uevent->resp.id = uevent->mc->id; | |
239 | break; | |
240 | default: | |
241 | uevent->resp.uid = ctx->uid; | |
242 | uevent->resp.id = ctx->id; | |
243 | break; | |
244 | } | |
75216638 SH |
245 | } |
246 | ||
247 | static int ucma_event_handler(struct rdma_cm_id *cm_id, | |
248 | struct rdma_cm_event *event) | |
249 | { | |
250 | struct ucma_event *uevent; | |
251 | struct ucma_context *ctx = cm_id->context; | |
252 | int ret = 0; | |
253 | ||
254 | uevent = kzalloc(sizeof(*uevent), GFP_KERNEL); | |
255 | if (!uevent) | |
256 | return event->event == RDMA_CM_EVENT_CONNECT_REQUEST; | |
257 | ||
258 | uevent->cm_id = cm_id; | |
259 | ucma_set_event_context(ctx, event, uevent); | |
260 | uevent->resp.event = event->event; | |
261 | uevent->resp.status = event->status; | |
c8f6a362 | 262 | if (cm_id->ps == RDMA_PS_UDP || cm_id->ps == RDMA_PS_IPOIB) |
75216638 SH |
263 | ucma_copy_ud_event(&uevent->resp.param.ud, &event->param.ud); |
264 | else | |
265 | ucma_copy_conn_event(&uevent->resp.param.conn, | |
266 | &event->param.conn); | |
267 | ||
268 | mutex_lock(&ctx->file->mut); | |
269 | if (event->event == RDMA_CM_EVENT_CONNECT_REQUEST) { | |
270 | if (!ctx->backlog) { | |
3492856e | 271 | ret = -ENOMEM; |
30a5ec98 | 272 | kfree(uevent); |
75216638 SH |
273 | goto out; |
274 | } | |
275 | ctx->backlog--; | |
0cefcf0b SH |
276 | } else if (!ctx->uid) { |
277 | /* | |
278 | * We ignore events for new connections until userspace has set | |
279 | * their context. This can only happen if an error occurs on a | |
280 | * new connection before the user accepts it. This is okay, | |
281 | * since the accept will just fail later. | |
282 | */ | |
283 | kfree(uevent); | |
284 | goto out; | |
75216638 | 285 | } |
0cefcf0b | 286 | |
75216638 SH |
287 | list_add_tail(&uevent->list, &ctx->file->event_list); |
288 | wake_up_interruptible(&ctx->file->poll_wait); | |
289 | out: | |
290 | mutex_unlock(&ctx->file->mut); | |
291 | return ret; | |
292 | } | |
293 | ||
294 | static ssize_t ucma_get_event(struct ucma_file *file, const char __user *inbuf, | |
295 | int in_len, int out_len) | |
296 | { | |
297 | struct ucma_context *ctx; | |
298 | struct rdma_ucm_get_event cmd; | |
299 | struct ucma_event *uevent; | |
300 | int ret = 0; | |
301 | DEFINE_WAIT(wait); | |
302 | ||
303 | if (out_len < sizeof uevent->resp) | |
304 | return -ENOSPC; | |
305 | ||
306 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
307 | return -EFAULT; | |
308 | ||
309 | mutex_lock(&file->mut); | |
310 | while (list_empty(&file->event_list)) { | |
d92f7644 | 311 | mutex_unlock(&file->mut); |
75216638 | 312 | |
d92f7644 SH |
313 | if (file->filp->f_flags & O_NONBLOCK) |
314 | return -EAGAIN; | |
315 | ||
316 | if (wait_event_interruptible(file->poll_wait, | |
317 | !list_empty(&file->event_list))) | |
318 | return -ERESTARTSYS; | |
75216638 | 319 | |
75216638 | 320 | mutex_lock(&file->mut); |
75216638 SH |
321 | } |
322 | ||
75216638 SH |
323 | uevent = list_entry(file->event_list.next, struct ucma_event, list); |
324 | ||
325 | if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) { | |
326 | ctx = ucma_alloc_ctx(file); | |
327 | if (!ctx) { | |
328 | ret = -ENOMEM; | |
329 | goto done; | |
330 | } | |
331 | uevent->ctx->backlog++; | |
332 | ctx->cm_id = uevent->cm_id; | |
333 | ctx->cm_id->context = ctx; | |
334 | uevent->resp.id = ctx->id; | |
335 | } | |
336 | ||
337 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
338 | &uevent->resp, sizeof uevent->resp)) { | |
339 | ret = -EFAULT; | |
340 | goto done; | |
341 | } | |
342 | ||
343 | list_del(&uevent->list); | |
344 | uevent->ctx->events_reported++; | |
c8f6a362 SH |
345 | if (uevent->mc) |
346 | uevent->mc->events_reported++; | |
75216638 SH |
347 | kfree(uevent); |
348 | done: | |
349 | mutex_unlock(&file->mut); | |
350 | return ret; | |
351 | } | |
352 | ||
353 | static ssize_t ucma_create_id(struct ucma_file *file, | |
354 | const char __user *inbuf, | |
355 | int in_len, int out_len) | |
356 | { | |
357 | struct rdma_ucm_create_id cmd; | |
358 | struct rdma_ucm_create_id_resp resp; | |
359 | struct ucma_context *ctx; | |
360 | int ret; | |
361 | ||
362 | if (out_len < sizeof(resp)) | |
363 | return -ENOSPC; | |
364 | ||
365 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
366 | return -EFAULT; | |
367 | ||
368 | mutex_lock(&file->mut); | |
369 | ctx = ucma_alloc_ctx(file); | |
370 | mutex_unlock(&file->mut); | |
371 | if (!ctx) | |
372 | return -ENOMEM; | |
373 | ||
374 | ctx->uid = cmd.uid; | |
375 | ctx->cm_id = rdma_create_id(ucma_event_handler, ctx, cmd.ps); | |
376 | if (IS_ERR(ctx->cm_id)) { | |
377 | ret = PTR_ERR(ctx->cm_id); | |
378 | goto err1; | |
379 | } | |
380 | ||
381 | resp.id = ctx->id; | |
382 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
383 | &resp, sizeof(resp))) { | |
384 | ret = -EFAULT; | |
385 | goto err2; | |
386 | } | |
387 | return 0; | |
388 | ||
389 | err2: | |
390 | rdma_destroy_id(ctx->cm_id); | |
391 | err1: | |
392 | mutex_lock(&mut); | |
393 | idr_remove(&ctx_idr, ctx->id); | |
394 | mutex_unlock(&mut); | |
395 | kfree(ctx); | |
396 | return ret; | |
397 | } | |
398 | ||
c8f6a362 SH |
399 | static void ucma_cleanup_multicast(struct ucma_context *ctx) |
400 | { | |
401 | struct ucma_multicast *mc, *tmp; | |
402 | ||
403 | mutex_lock(&mut); | |
404 | list_for_each_entry_safe(mc, tmp, &ctx->mc_list, list) { | |
405 | list_del(&mc->list); | |
406 | idr_remove(&multicast_idr, mc->id); | |
407 | kfree(mc); | |
408 | } | |
409 | mutex_unlock(&mut); | |
410 | } | |
411 | ||
75216638 SH |
412 | static void ucma_cleanup_events(struct ucma_context *ctx) |
413 | { | |
414 | struct ucma_event *uevent, *tmp; | |
415 | ||
416 | list_for_each_entry_safe(uevent, tmp, &ctx->file->event_list, list) { | |
417 | if (uevent->ctx != ctx) | |
418 | continue; | |
419 | ||
420 | list_del(&uevent->list); | |
421 | ||
422 | /* clear incoming connections. */ | |
423 | if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) | |
424 | rdma_destroy_id(uevent->cm_id); | |
425 | ||
426 | kfree(uevent); | |
427 | } | |
428 | } | |
429 | ||
c8f6a362 SH |
430 | static void ucma_cleanup_mc_events(struct ucma_multicast *mc) |
431 | { | |
432 | struct ucma_event *uevent, *tmp; | |
433 | ||
434 | list_for_each_entry_safe(uevent, tmp, &mc->ctx->file->event_list, list) { | |
435 | if (uevent->mc != mc) | |
436 | continue; | |
437 | ||
438 | list_del(&uevent->list); | |
439 | kfree(uevent); | |
440 | } | |
441 | } | |
442 | ||
75216638 SH |
443 | static int ucma_free_ctx(struct ucma_context *ctx) |
444 | { | |
445 | int events_reported; | |
446 | ||
447 | /* No new events will be generated after destroying the id. */ | |
448 | rdma_destroy_id(ctx->cm_id); | |
449 | ||
c8f6a362 SH |
450 | ucma_cleanup_multicast(ctx); |
451 | ||
75216638 SH |
452 | /* Cleanup events not yet reported to the user. */ |
453 | mutex_lock(&ctx->file->mut); | |
454 | ucma_cleanup_events(ctx); | |
455 | list_del(&ctx->list); | |
456 | mutex_unlock(&ctx->file->mut); | |
457 | ||
458 | events_reported = ctx->events_reported; | |
459 | kfree(ctx); | |
460 | return events_reported; | |
461 | } | |
462 | ||
463 | static ssize_t ucma_destroy_id(struct ucma_file *file, const char __user *inbuf, | |
464 | int in_len, int out_len) | |
465 | { | |
466 | struct rdma_ucm_destroy_id cmd; | |
467 | struct rdma_ucm_destroy_id_resp resp; | |
468 | struct ucma_context *ctx; | |
469 | int ret = 0; | |
470 | ||
471 | if (out_len < sizeof(resp)) | |
472 | return -ENOSPC; | |
473 | ||
474 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
475 | return -EFAULT; | |
476 | ||
477 | mutex_lock(&mut); | |
478 | ctx = _ucma_find_context(cmd.id, file); | |
479 | if (!IS_ERR(ctx)) | |
480 | idr_remove(&ctx_idr, ctx->id); | |
481 | mutex_unlock(&mut); | |
482 | ||
483 | if (IS_ERR(ctx)) | |
484 | return PTR_ERR(ctx); | |
485 | ||
486 | ucma_put_ctx(ctx); | |
487 | wait_for_completion(&ctx->comp); | |
488 | resp.events_reported = ucma_free_ctx(ctx); | |
489 | ||
490 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
491 | &resp, sizeof(resp))) | |
492 | ret = -EFAULT; | |
493 | ||
494 | return ret; | |
495 | } | |
496 | ||
497 | static ssize_t ucma_bind_addr(struct ucma_file *file, const char __user *inbuf, | |
498 | int in_len, int out_len) | |
499 | { | |
500 | struct rdma_ucm_bind_addr cmd; | |
501 | struct ucma_context *ctx; | |
502 | int ret; | |
503 | ||
504 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
505 | return -EFAULT; | |
506 | ||
507 | ctx = ucma_get_ctx(file, cmd.id); | |
508 | if (IS_ERR(ctx)) | |
509 | return PTR_ERR(ctx); | |
510 | ||
511 | ret = rdma_bind_addr(ctx->cm_id, (struct sockaddr *) &cmd.addr); | |
512 | ucma_put_ctx(ctx); | |
513 | return ret; | |
514 | } | |
515 | ||
516 | static ssize_t ucma_resolve_addr(struct ucma_file *file, | |
517 | const char __user *inbuf, | |
518 | int in_len, int out_len) | |
519 | { | |
520 | struct rdma_ucm_resolve_addr cmd; | |
521 | struct ucma_context *ctx; | |
522 | int ret; | |
523 | ||
524 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
525 | return -EFAULT; | |
526 | ||
527 | ctx = ucma_get_ctx(file, cmd.id); | |
528 | if (IS_ERR(ctx)) | |
529 | return PTR_ERR(ctx); | |
530 | ||
531 | ret = rdma_resolve_addr(ctx->cm_id, (struct sockaddr *) &cmd.src_addr, | |
532 | (struct sockaddr *) &cmd.dst_addr, | |
533 | cmd.timeout_ms); | |
534 | ucma_put_ctx(ctx); | |
535 | return ret; | |
536 | } | |
537 | ||
538 | static ssize_t ucma_resolve_route(struct ucma_file *file, | |
539 | const char __user *inbuf, | |
540 | int in_len, int out_len) | |
541 | { | |
542 | struct rdma_ucm_resolve_route cmd; | |
543 | struct ucma_context *ctx; | |
544 | int ret; | |
545 | ||
546 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
547 | return -EFAULT; | |
548 | ||
549 | ctx = ucma_get_ctx(file, cmd.id); | |
550 | if (IS_ERR(ctx)) | |
551 | return PTR_ERR(ctx); | |
552 | ||
553 | ret = rdma_resolve_route(ctx->cm_id, cmd.timeout_ms); | |
554 | ucma_put_ctx(ctx); | |
555 | return ret; | |
556 | } | |
557 | ||
558 | static void ucma_copy_ib_route(struct rdma_ucm_query_route_resp *resp, | |
559 | struct rdma_route *route) | |
560 | { | |
561 | struct rdma_dev_addr *dev_addr; | |
562 | ||
563 | resp->num_paths = route->num_paths; | |
564 | switch (route->num_paths) { | |
565 | case 0: | |
566 | dev_addr = &route->addr.dev_addr; | |
6f8372b6 SH |
567 | rdma_addr_get_dgid(dev_addr, |
568 | (union ib_gid *) &resp->ib_route[0].dgid); | |
569 | rdma_addr_get_sgid(dev_addr, | |
570 | (union ib_gid *) &resp->ib_route[0].sgid); | |
75216638 SH |
571 | resp->ib_route[0].pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); |
572 | break; | |
573 | case 2: | |
574 | ib_copy_path_rec_to_user(&resp->ib_route[1], | |
575 | &route->path_rec[1]); | |
576 | /* fall through */ | |
577 | case 1: | |
578 | ib_copy_path_rec_to_user(&resp->ib_route[0], | |
579 | &route->path_rec[0]); | |
580 | break; | |
581 | default: | |
582 | break; | |
583 | } | |
584 | } | |
585 | ||
586 | static ssize_t ucma_query_route(struct ucma_file *file, | |
587 | const char __user *inbuf, | |
588 | int in_len, int out_len) | |
589 | { | |
590 | struct rdma_ucm_query_route cmd; | |
591 | struct rdma_ucm_query_route_resp resp; | |
592 | struct ucma_context *ctx; | |
593 | struct sockaddr *addr; | |
594 | int ret = 0; | |
595 | ||
596 | if (out_len < sizeof(resp)) | |
597 | return -ENOSPC; | |
598 | ||
599 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
600 | return -EFAULT; | |
601 | ||
602 | ctx = ucma_get_ctx(file, cmd.id); | |
603 | if (IS_ERR(ctx)) | |
604 | return PTR_ERR(ctx); | |
605 | ||
606 | memset(&resp, 0, sizeof resp); | |
3f446754 | 607 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.src_addr; |
75216638 SH |
608 | memcpy(&resp.src_addr, addr, addr->sa_family == AF_INET ? |
609 | sizeof(struct sockaddr_in) : | |
610 | sizeof(struct sockaddr_in6)); | |
3f446754 | 611 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.dst_addr; |
75216638 SH |
612 | memcpy(&resp.dst_addr, addr, addr->sa_family == AF_INET ? |
613 | sizeof(struct sockaddr_in) : | |
614 | sizeof(struct sockaddr_in6)); | |
615 | if (!ctx->cm_id->device) | |
616 | goto out; | |
617 | ||
9cda779c | 618 | resp.node_guid = (__force __u64) ctx->cm_id->device->node_guid; |
75216638 SH |
619 | resp.port_num = ctx->cm_id->port_num; |
620 | switch (rdma_node_get_transport(ctx->cm_id->device->node_type)) { | |
621 | case RDMA_TRANSPORT_IB: | |
622 | ucma_copy_ib_route(&resp, &ctx->cm_id->route); | |
623 | break; | |
624 | default: | |
625 | break; | |
626 | } | |
627 | ||
628 | out: | |
629 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
630 | &resp, sizeof(resp))) | |
631 | ret = -EFAULT; | |
632 | ||
633 | ucma_put_ctx(ctx); | |
634 | return ret; | |
635 | } | |
636 | ||
637 | static void ucma_copy_conn_param(struct rdma_conn_param *dst, | |
638 | struct rdma_ucm_conn_param *src) | |
639 | { | |
640 | dst->private_data = src->private_data; | |
641 | dst->private_data_len = src->private_data_len; | |
642 | dst->responder_resources =src->responder_resources; | |
643 | dst->initiator_depth = src->initiator_depth; | |
644 | dst->flow_control = src->flow_control; | |
645 | dst->retry_count = src->retry_count; | |
646 | dst->rnr_retry_count = src->rnr_retry_count; | |
647 | dst->srq = src->srq; | |
648 | dst->qp_num = src->qp_num; | |
649 | } | |
650 | ||
651 | static ssize_t ucma_connect(struct ucma_file *file, const char __user *inbuf, | |
652 | int in_len, int out_len) | |
653 | { | |
654 | struct rdma_ucm_connect cmd; | |
655 | struct rdma_conn_param conn_param; | |
656 | struct ucma_context *ctx; | |
657 | int ret; | |
658 | ||
659 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
660 | return -EFAULT; | |
661 | ||
662 | if (!cmd.conn_param.valid) | |
663 | return -EINVAL; | |
664 | ||
665 | ctx = ucma_get_ctx(file, cmd.id); | |
666 | if (IS_ERR(ctx)) | |
667 | return PTR_ERR(ctx); | |
668 | ||
669 | ucma_copy_conn_param(&conn_param, &cmd.conn_param); | |
670 | ret = rdma_connect(ctx->cm_id, &conn_param); | |
671 | ucma_put_ctx(ctx); | |
672 | return ret; | |
673 | } | |
674 | ||
675 | static ssize_t ucma_listen(struct ucma_file *file, const char __user *inbuf, | |
676 | int in_len, int out_len) | |
677 | { | |
678 | struct rdma_ucm_listen cmd; | |
679 | struct ucma_context *ctx; | |
680 | int ret; | |
681 | ||
682 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
683 | return -EFAULT; | |
684 | ||
685 | ctx = ucma_get_ctx(file, cmd.id); | |
686 | if (IS_ERR(ctx)) | |
687 | return PTR_ERR(ctx); | |
688 | ||
689 | ctx->backlog = cmd.backlog > 0 && cmd.backlog < UCMA_MAX_BACKLOG ? | |
690 | cmd.backlog : UCMA_MAX_BACKLOG; | |
691 | ret = rdma_listen(ctx->cm_id, ctx->backlog); | |
692 | ucma_put_ctx(ctx); | |
693 | return ret; | |
694 | } | |
695 | ||
696 | static ssize_t ucma_accept(struct ucma_file *file, const char __user *inbuf, | |
697 | int in_len, int out_len) | |
698 | { | |
699 | struct rdma_ucm_accept cmd; | |
700 | struct rdma_conn_param conn_param; | |
701 | struct ucma_context *ctx; | |
702 | int ret; | |
703 | ||
704 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
705 | return -EFAULT; | |
706 | ||
707 | ctx = ucma_get_ctx(file, cmd.id); | |
708 | if (IS_ERR(ctx)) | |
709 | return PTR_ERR(ctx); | |
710 | ||
711 | if (cmd.conn_param.valid) { | |
712 | ctx->uid = cmd.uid; | |
713 | ucma_copy_conn_param(&conn_param, &cmd.conn_param); | |
714 | ret = rdma_accept(ctx->cm_id, &conn_param); | |
715 | } else | |
716 | ret = rdma_accept(ctx->cm_id, NULL); | |
717 | ||
718 | ucma_put_ctx(ctx); | |
719 | return ret; | |
720 | } | |
721 | ||
722 | static ssize_t ucma_reject(struct ucma_file *file, const char __user *inbuf, | |
723 | int in_len, int out_len) | |
724 | { | |
725 | struct rdma_ucm_reject cmd; | |
726 | struct ucma_context *ctx; | |
727 | int ret; | |
728 | ||
729 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
730 | return -EFAULT; | |
731 | ||
732 | ctx = ucma_get_ctx(file, cmd.id); | |
733 | if (IS_ERR(ctx)) | |
734 | return PTR_ERR(ctx); | |
735 | ||
736 | ret = rdma_reject(ctx->cm_id, cmd.private_data, cmd.private_data_len); | |
737 | ucma_put_ctx(ctx); | |
738 | return ret; | |
739 | } | |
740 | ||
741 | static ssize_t ucma_disconnect(struct ucma_file *file, const char __user *inbuf, | |
742 | int in_len, int out_len) | |
743 | { | |
744 | struct rdma_ucm_disconnect cmd; | |
745 | struct ucma_context *ctx; | |
746 | int ret; | |
747 | ||
748 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
749 | return -EFAULT; | |
750 | ||
751 | ctx = ucma_get_ctx(file, cmd.id); | |
752 | if (IS_ERR(ctx)) | |
753 | return PTR_ERR(ctx); | |
754 | ||
755 | ret = rdma_disconnect(ctx->cm_id); | |
756 | ucma_put_ctx(ctx); | |
757 | return ret; | |
758 | } | |
759 | ||
760 | static ssize_t ucma_init_qp_attr(struct ucma_file *file, | |
761 | const char __user *inbuf, | |
762 | int in_len, int out_len) | |
763 | { | |
764 | struct rdma_ucm_init_qp_attr cmd; | |
765 | struct ib_uverbs_qp_attr resp; | |
766 | struct ucma_context *ctx; | |
767 | struct ib_qp_attr qp_attr; | |
768 | int ret; | |
769 | ||
770 | if (out_len < sizeof(resp)) | |
771 | return -ENOSPC; | |
772 | ||
773 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
774 | return -EFAULT; | |
775 | ||
776 | ctx = ucma_get_ctx(file, cmd.id); | |
777 | if (IS_ERR(ctx)) | |
778 | return PTR_ERR(ctx); | |
779 | ||
780 | resp.qp_attr_mask = 0; | |
781 | memset(&qp_attr, 0, sizeof qp_attr); | |
782 | qp_attr.qp_state = cmd.qp_state; | |
783 | ret = rdma_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask); | |
784 | if (ret) | |
785 | goto out; | |
786 | ||
787 | ib_copy_qp_attr_to_user(&resp, &qp_attr); | |
788 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
789 | &resp, sizeof(resp))) | |
790 | ret = -EFAULT; | |
791 | ||
792 | out: | |
793 | ucma_put_ctx(ctx); | |
794 | return ret; | |
795 | } | |
796 | ||
7ce86409 SH |
797 | static int ucma_set_option_id(struct ucma_context *ctx, int optname, |
798 | void *optval, size_t optlen) | |
799 | { | |
800 | int ret = 0; | |
801 | ||
802 | switch (optname) { | |
803 | case RDMA_OPTION_ID_TOS: | |
804 | if (optlen != sizeof(u8)) { | |
805 | ret = -EINVAL; | |
806 | break; | |
807 | } | |
808 | rdma_set_service_type(ctx->cm_id, *((u8 *) optval)); | |
809 | break; | |
810 | default: | |
811 | ret = -ENOSYS; | |
812 | } | |
813 | ||
814 | return ret; | |
815 | } | |
816 | ||
a7ca1f00 SH |
817 | static int ucma_set_ib_path(struct ucma_context *ctx, |
818 | struct ib_path_rec_data *path_data, size_t optlen) | |
819 | { | |
820 | struct ib_sa_path_rec sa_path; | |
821 | struct rdma_cm_event event; | |
822 | int ret; | |
823 | ||
824 | if (optlen % sizeof(*path_data)) | |
825 | return -EINVAL; | |
826 | ||
827 | for (; optlen; optlen -= sizeof(*path_data), path_data++) { | |
828 | if (path_data->flags == (IB_PATH_GMP | IB_PATH_PRIMARY | | |
829 | IB_PATH_BIDIRECTIONAL)) | |
830 | break; | |
831 | } | |
832 | ||
833 | if (!optlen) | |
834 | return -EINVAL; | |
835 | ||
836 | ib_sa_unpack_path(path_data->path_rec, &sa_path); | |
837 | ret = rdma_set_ib_paths(ctx->cm_id, &sa_path, 1); | |
838 | if (ret) | |
839 | return ret; | |
840 | ||
841 | memset(&event, 0, sizeof event); | |
842 | event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; | |
843 | return ucma_event_handler(ctx->cm_id, &event); | |
844 | } | |
845 | ||
846 | static int ucma_set_option_ib(struct ucma_context *ctx, int optname, | |
847 | void *optval, size_t optlen) | |
848 | { | |
849 | int ret; | |
850 | ||
851 | switch (optname) { | |
852 | case RDMA_OPTION_IB_PATH: | |
853 | ret = ucma_set_ib_path(ctx, optval, optlen); | |
854 | break; | |
855 | default: | |
856 | ret = -ENOSYS; | |
857 | } | |
858 | ||
859 | return ret; | |
860 | } | |
861 | ||
7ce86409 SH |
862 | static int ucma_set_option_level(struct ucma_context *ctx, int level, |
863 | int optname, void *optval, size_t optlen) | |
864 | { | |
865 | int ret; | |
866 | ||
867 | switch (level) { | |
868 | case RDMA_OPTION_ID: | |
869 | ret = ucma_set_option_id(ctx, optname, optval, optlen); | |
870 | break; | |
a7ca1f00 SH |
871 | case RDMA_OPTION_IB: |
872 | ret = ucma_set_option_ib(ctx, optname, optval, optlen); | |
873 | break; | |
7ce86409 SH |
874 | default: |
875 | ret = -ENOSYS; | |
876 | } | |
877 | ||
878 | return ret; | |
879 | } | |
880 | ||
881 | static ssize_t ucma_set_option(struct ucma_file *file, const char __user *inbuf, | |
882 | int in_len, int out_len) | |
883 | { | |
884 | struct rdma_ucm_set_option cmd; | |
885 | struct ucma_context *ctx; | |
886 | void *optval; | |
887 | int ret; | |
888 | ||
889 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
890 | return -EFAULT; | |
891 | ||
892 | ctx = ucma_get_ctx(file, cmd.id); | |
893 | if (IS_ERR(ctx)) | |
894 | return PTR_ERR(ctx); | |
895 | ||
896 | optval = kmalloc(cmd.optlen, GFP_KERNEL); | |
897 | if (!optval) { | |
898 | ret = -ENOMEM; | |
899 | goto out1; | |
900 | } | |
901 | ||
902 | if (copy_from_user(optval, (void __user *) (unsigned long) cmd.optval, | |
903 | cmd.optlen)) { | |
904 | ret = -EFAULT; | |
905 | goto out2; | |
906 | } | |
907 | ||
908 | ret = ucma_set_option_level(ctx, cmd.level, cmd.optname, optval, | |
909 | cmd.optlen); | |
910 | out2: | |
911 | kfree(optval); | |
912 | out1: | |
913 | ucma_put_ctx(ctx); | |
914 | return ret; | |
915 | } | |
916 | ||
75216638 SH |
917 | static ssize_t ucma_notify(struct ucma_file *file, const char __user *inbuf, |
918 | int in_len, int out_len) | |
919 | { | |
920 | struct rdma_ucm_notify cmd; | |
921 | struct ucma_context *ctx; | |
922 | int ret; | |
923 | ||
924 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
925 | return -EFAULT; | |
926 | ||
927 | ctx = ucma_get_ctx(file, cmd.id); | |
928 | if (IS_ERR(ctx)) | |
929 | return PTR_ERR(ctx); | |
930 | ||
931 | ret = rdma_notify(ctx->cm_id, (enum ib_event_type) cmd.event); | |
932 | ucma_put_ctx(ctx); | |
933 | return ret; | |
934 | } | |
935 | ||
c8f6a362 SH |
936 | static ssize_t ucma_join_multicast(struct ucma_file *file, |
937 | const char __user *inbuf, | |
938 | int in_len, int out_len) | |
939 | { | |
940 | struct rdma_ucm_join_mcast cmd; | |
941 | struct rdma_ucm_create_id_resp resp; | |
942 | struct ucma_context *ctx; | |
943 | struct ucma_multicast *mc; | |
944 | int ret; | |
945 | ||
946 | if (out_len < sizeof(resp)) | |
947 | return -ENOSPC; | |
948 | ||
949 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
950 | return -EFAULT; | |
951 | ||
952 | ctx = ucma_get_ctx(file, cmd.id); | |
953 | if (IS_ERR(ctx)) | |
954 | return PTR_ERR(ctx); | |
955 | ||
956 | mutex_lock(&file->mut); | |
957 | mc = ucma_alloc_multicast(ctx); | |
6aea938f JB |
958 | if (!mc) { |
959 | ret = -ENOMEM; | |
c8f6a362 SH |
960 | goto err1; |
961 | } | |
962 | ||
963 | mc->uid = cmd.uid; | |
964 | memcpy(&mc->addr, &cmd.addr, sizeof cmd.addr); | |
3f446754 | 965 | ret = rdma_join_multicast(ctx->cm_id, (struct sockaddr *) &mc->addr, mc); |
c8f6a362 SH |
966 | if (ret) |
967 | goto err2; | |
968 | ||
969 | resp.id = mc->id; | |
970 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
971 | &resp, sizeof(resp))) { | |
972 | ret = -EFAULT; | |
973 | goto err3; | |
974 | } | |
975 | ||
976 | mutex_unlock(&file->mut); | |
977 | ucma_put_ctx(ctx); | |
978 | return 0; | |
979 | ||
980 | err3: | |
3f446754 | 981 | rdma_leave_multicast(ctx->cm_id, (struct sockaddr *) &mc->addr); |
c8f6a362 SH |
982 | ucma_cleanup_mc_events(mc); |
983 | err2: | |
984 | mutex_lock(&mut); | |
985 | idr_remove(&multicast_idr, mc->id); | |
986 | mutex_unlock(&mut); | |
987 | list_del(&mc->list); | |
988 | kfree(mc); | |
989 | err1: | |
990 | mutex_unlock(&file->mut); | |
991 | ucma_put_ctx(ctx); | |
992 | return ret; | |
993 | } | |
994 | ||
995 | static ssize_t ucma_leave_multicast(struct ucma_file *file, | |
996 | const char __user *inbuf, | |
997 | int in_len, int out_len) | |
998 | { | |
999 | struct rdma_ucm_destroy_id cmd; | |
1000 | struct rdma_ucm_destroy_id_resp resp; | |
1001 | struct ucma_multicast *mc; | |
1002 | int ret = 0; | |
1003 | ||
1004 | if (out_len < sizeof(resp)) | |
1005 | return -ENOSPC; | |
1006 | ||
1007 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1008 | return -EFAULT; | |
1009 | ||
1010 | mutex_lock(&mut); | |
1011 | mc = idr_find(&multicast_idr, cmd.id); | |
1012 | if (!mc) | |
1013 | mc = ERR_PTR(-ENOENT); | |
1014 | else if (mc->ctx->file != file) | |
1015 | mc = ERR_PTR(-EINVAL); | |
1016 | else { | |
1017 | idr_remove(&multicast_idr, mc->id); | |
1018 | atomic_inc(&mc->ctx->ref); | |
1019 | } | |
1020 | mutex_unlock(&mut); | |
1021 | ||
1022 | if (IS_ERR(mc)) { | |
1023 | ret = PTR_ERR(mc); | |
1024 | goto out; | |
1025 | } | |
1026 | ||
3f446754 | 1027 | rdma_leave_multicast(mc->ctx->cm_id, (struct sockaddr *) &mc->addr); |
c8f6a362 SH |
1028 | mutex_lock(&mc->ctx->file->mut); |
1029 | ucma_cleanup_mc_events(mc); | |
1030 | list_del(&mc->list); | |
1031 | mutex_unlock(&mc->ctx->file->mut); | |
1032 | ||
1033 | ucma_put_ctx(mc->ctx); | |
1034 | resp.events_reported = mc->events_reported; | |
1035 | kfree(mc); | |
1036 | ||
1037 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
1038 | &resp, sizeof(resp))) | |
1039 | ret = -EFAULT; | |
1040 | out: | |
1041 | return ret; | |
1042 | } | |
1043 | ||
88314e4d SH |
1044 | static void ucma_lock_files(struct ucma_file *file1, struct ucma_file *file2) |
1045 | { | |
1046 | /* Acquire mutex's based on pointer comparison to prevent deadlock. */ | |
1047 | if (file1 < file2) { | |
1048 | mutex_lock(&file1->mut); | |
1049 | mutex_lock(&file2->mut); | |
1050 | } else { | |
1051 | mutex_lock(&file2->mut); | |
1052 | mutex_lock(&file1->mut); | |
1053 | } | |
1054 | } | |
1055 | ||
1056 | static void ucma_unlock_files(struct ucma_file *file1, struct ucma_file *file2) | |
1057 | { | |
1058 | if (file1 < file2) { | |
1059 | mutex_unlock(&file2->mut); | |
1060 | mutex_unlock(&file1->mut); | |
1061 | } else { | |
1062 | mutex_unlock(&file1->mut); | |
1063 | mutex_unlock(&file2->mut); | |
1064 | } | |
1065 | } | |
1066 | ||
1067 | static void ucma_move_events(struct ucma_context *ctx, struct ucma_file *file) | |
1068 | { | |
1069 | struct ucma_event *uevent, *tmp; | |
1070 | ||
1071 | list_for_each_entry_safe(uevent, tmp, &ctx->file->event_list, list) | |
1072 | if (uevent->ctx == ctx) | |
1073 | list_move_tail(&uevent->list, &file->event_list); | |
1074 | } | |
1075 | ||
1076 | static ssize_t ucma_migrate_id(struct ucma_file *new_file, | |
1077 | const char __user *inbuf, | |
1078 | int in_len, int out_len) | |
1079 | { | |
1080 | struct rdma_ucm_migrate_id cmd; | |
1081 | struct rdma_ucm_migrate_resp resp; | |
1082 | struct ucma_context *ctx; | |
1083 | struct file *filp; | |
1084 | struct ucma_file *cur_file; | |
1085 | int ret = 0; | |
1086 | ||
1087 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1088 | return -EFAULT; | |
1089 | ||
1090 | /* Get current fd to protect against it being closed */ | |
1091 | filp = fget(cmd.fd); | |
1092 | if (!filp) | |
1093 | return -ENOENT; | |
1094 | ||
1095 | /* Validate current fd and prevent destruction of id. */ | |
1096 | ctx = ucma_get_ctx(filp->private_data, cmd.id); | |
1097 | if (IS_ERR(ctx)) { | |
1098 | ret = PTR_ERR(ctx); | |
1099 | goto file_put; | |
1100 | } | |
1101 | ||
1102 | cur_file = ctx->file; | |
1103 | if (cur_file == new_file) { | |
1104 | resp.events_reported = ctx->events_reported; | |
1105 | goto response; | |
1106 | } | |
1107 | ||
1108 | /* | |
1109 | * Migrate events between fd's, maintaining order, and avoiding new | |
1110 | * events being added before existing events. | |
1111 | */ | |
1112 | ucma_lock_files(cur_file, new_file); | |
1113 | mutex_lock(&mut); | |
1114 | ||
1115 | list_move_tail(&ctx->list, &new_file->ctx_list); | |
1116 | ucma_move_events(ctx, new_file); | |
1117 | ctx->file = new_file; | |
1118 | resp.events_reported = ctx->events_reported; | |
1119 | ||
1120 | mutex_unlock(&mut); | |
1121 | ucma_unlock_files(cur_file, new_file); | |
1122 | ||
1123 | response: | |
1124 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
1125 | &resp, sizeof(resp))) | |
1126 | ret = -EFAULT; | |
1127 | ||
1128 | ucma_put_ctx(ctx); | |
1129 | file_put: | |
1130 | fput(filp); | |
1131 | return ret; | |
1132 | } | |
1133 | ||
75216638 SH |
1134 | static ssize_t (*ucma_cmd_table[])(struct ucma_file *file, |
1135 | const char __user *inbuf, | |
1136 | int in_len, int out_len) = { | |
1137 | [RDMA_USER_CM_CMD_CREATE_ID] = ucma_create_id, | |
1138 | [RDMA_USER_CM_CMD_DESTROY_ID] = ucma_destroy_id, | |
1139 | [RDMA_USER_CM_CMD_BIND_ADDR] = ucma_bind_addr, | |
1140 | [RDMA_USER_CM_CMD_RESOLVE_ADDR] = ucma_resolve_addr, | |
1141 | [RDMA_USER_CM_CMD_RESOLVE_ROUTE]= ucma_resolve_route, | |
1142 | [RDMA_USER_CM_CMD_QUERY_ROUTE] = ucma_query_route, | |
1143 | [RDMA_USER_CM_CMD_CONNECT] = ucma_connect, | |
1144 | [RDMA_USER_CM_CMD_LISTEN] = ucma_listen, | |
1145 | [RDMA_USER_CM_CMD_ACCEPT] = ucma_accept, | |
1146 | [RDMA_USER_CM_CMD_REJECT] = ucma_reject, | |
1147 | [RDMA_USER_CM_CMD_DISCONNECT] = ucma_disconnect, | |
1148 | [RDMA_USER_CM_CMD_INIT_QP_ATTR] = ucma_init_qp_attr, | |
1149 | [RDMA_USER_CM_CMD_GET_EVENT] = ucma_get_event, | |
1150 | [RDMA_USER_CM_CMD_GET_OPTION] = NULL, | |
7ce86409 | 1151 | [RDMA_USER_CM_CMD_SET_OPTION] = ucma_set_option, |
75216638 | 1152 | [RDMA_USER_CM_CMD_NOTIFY] = ucma_notify, |
c8f6a362 SH |
1153 | [RDMA_USER_CM_CMD_JOIN_MCAST] = ucma_join_multicast, |
1154 | [RDMA_USER_CM_CMD_LEAVE_MCAST] = ucma_leave_multicast, | |
88314e4d | 1155 | [RDMA_USER_CM_CMD_MIGRATE_ID] = ucma_migrate_id |
75216638 SH |
1156 | }; |
1157 | ||
1158 | static ssize_t ucma_write(struct file *filp, const char __user *buf, | |
1159 | size_t len, loff_t *pos) | |
1160 | { | |
1161 | struct ucma_file *file = filp->private_data; | |
1162 | struct rdma_ucm_cmd_hdr hdr; | |
1163 | ssize_t ret; | |
1164 | ||
1165 | if (len < sizeof(hdr)) | |
1166 | return -EINVAL; | |
1167 | ||
1168 | if (copy_from_user(&hdr, buf, sizeof(hdr))) | |
1169 | return -EFAULT; | |
1170 | ||
1171 | if (hdr.cmd < 0 || hdr.cmd >= ARRAY_SIZE(ucma_cmd_table)) | |
1172 | return -EINVAL; | |
1173 | ||
1174 | if (hdr.in + sizeof(hdr) > len) | |
1175 | return -EINVAL; | |
1176 | ||
1177 | if (!ucma_cmd_table[hdr.cmd]) | |
1178 | return -ENOSYS; | |
1179 | ||
1180 | ret = ucma_cmd_table[hdr.cmd](file, buf + sizeof(hdr), hdr.in, hdr.out); | |
1181 | if (!ret) | |
1182 | ret = len; | |
1183 | ||
1184 | return ret; | |
1185 | } | |
1186 | ||
1187 | static unsigned int ucma_poll(struct file *filp, struct poll_table_struct *wait) | |
1188 | { | |
1189 | struct ucma_file *file = filp->private_data; | |
1190 | unsigned int mask = 0; | |
1191 | ||
1192 | poll_wait(filp, &file->poll_wait, wait); | |
1193 | ||
1194 | if (!list_empty(&file->event_list)) | |
1195 | mask = POLLIN | POLLRDNORM; | |
1196 | ||
1197 | return mask; | |
1198 | } | |
1199 | ||
f7a6117e RD |
1200 | /* |
1201 | * ucma_open() does not need the BKL: | |
1202 | * | |
1203 | * - no global state is referred to; | |
1204 | * - there is no ioctl method to race against; | |
1205 | * - no further module initialization is required for open to work | |
1206 | * after the device is registered. | |
1207 | */ | |
75216638 SH |
1208 | static int ucma_open(struct inode *inode, struct file *filp) |
1209 | { | |
1210 | struct ucma_file *file; | |
1211 | ||
1212 | file = kmalloc(sizeof *file, GFP_KERNEL); | |
1213 | if (!file) | |
1214 | return -ENOMEM; | |
1215 | ||
1216 | INIT_LIST_HEAD(&file->event_list); | |
1217 | INIT_LIST_HEAD(&file->ctx_list); | |
1218 | init_waitqueue_head(&file->poll_wait); | |
1219 | mutex_init(&file->mut); | |
1220 | ||
1221 | filp->private_data = file; | |
1222 | file->filp = filp; | |
1223 | return 0; | |
1224 | } | |
1225 | ||
1226 | static int ucma_close(struct inode *inode, struct file *filp) | |
1227 | { | |
1228 | struct ucma_file *file = filp->private_data; | |
1229 | struct ucma_context *ctx, *tmp; | |
1230 | ||
1231 | mutex_lock(&file->mut); | |
1232 | list_for_each_entry_safe(ctx, tmp, &file->ctx_list, list) { | |
1233 | mutex_unlock(&file->mut); | |
1234 | ||
1235 | mutex_lock(&mut); | |
1236 | idr_remove(&ctx_idr, ctx->id); | |
1237 | mutex_unlock(&mut); | |
1238 | ||
1239 | ucma_free_ctx(ctx); | |
1240 | mutex_lock(&file->mut); | |
1241 | } | |
1242 | mutex_unlock(&file->mut); | |
1243 | kfree(file); | |
1244 | return 0; | |
1245 | } | |
1246 | ||
2b8693c0 | 1247 | static const struct file_operations ucma_fops = { |
75216638 SH |
1248 | .owner = THIS_MODULE, |
1249 | .open = ucma_open, | |
1250 | .release = ucma_close, | |
1251 | .write = ucma_write, | |
1252 | .poll = ucma_poll, | |
1253 | }; | |
1254 | ||
1255 | static struct miscdevice ucma_misc = { | |
1256 | .minor = MISC_DYNAMIC_MINOR, | |
1257 | .name = "rdma_cm", | |
1258 | .fops = &ucma_fops, | |
1259 | }; | |
1260 | ||
1261 | static ssize_t show_abi_version(struct device *dev, | |
1262 | struct device_attribute *attr, | |
1263 | char *buf) | |
1264 | { | |
1265 | return sprintf(buf, "%d\n", RDMA_USER_CM_ABI_VERSION); | |
1266 | } | |
1267 | static DEVICE_ATTR(abi_version, S_IRUGO, show_abi_version, NULL); | |
1268 | ||
1269 | static int __init ucma_init(void) | |
1270 | { | |
1271 | int ret; | |
1272 | ||
1273 | ret = misc_register(&ucma_misc); | |
1274 | if (ret) | |
1275 | return ret; | |
1276 | ||
1277 | ret = device_create_file(ucma_misc.this_device, &dev_attr_abi_version); | |
1278 | if (ret) { | |
1279 | printk(KERN_ERR "rdma_ucm: couldn't create abi_version attr\n"); | |
1280 | goto err; | |
1281 | } | |
1282 | return 0; | |
1283 | err: | |
1284 | misc_deregister(&ucma_misc); | |
1285 | return ret; | |
1286 | } | |
1287 | ||
1288 | static void __exit ucma_cleanup(void) | |
1289 | { | |
1290 | device_remove_file(ucma_misc.this_device, &dev_attr_abi_version); | |
1291 | misc_deregister(&ucma_misc); | |
1292 | idr_destroy(&ctx_idr); | |
1293 | } | |
1294 | ||
1295 | module_init(ucma_init); | |
1296 | module_exit(ucma_cleanup); |