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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 | ||
75216638 SH |
69 | struct ucma_file { |
70 | struct mutex mut; | |
71 | struct file *filp; | |
72 | struct list_head ctx_list; | |
73 | struct list_head event_list; | |
74 | wait_queue_head_t poll_wait; | |
75 | }; | |
76 | ||
77 | struct ucma_context { | |
78 | int id; | |
79 | struct completion comp; | |
80 | atomic_t ref; | |
81 | int events_reported; | |
82 | int backlog; | |
83 | ||
84 | struct ucma_file *file; | |
85 | struct rdma_cm_id *cm_id; | |
86 | u64 uid; | |
87 | ||
88 | struct list_head list; | |
c8f6a362 SH |
89 | struct list_head mc_list; |
90 | }; | |
91 | ||
92 | struct ucma_multicast { | |
93 | struct ucma_context *ctx; | |
94 | int id; | |
95 | int events_reported; | |
96 | ||
97 | u64 uid; | |
98 | struct list_head list; | |
3f446754 | 99 | struct sockaddr_storage addr; |
75216638 SH |
100 | }; |
101 | ||
102 | struct ucma_event { | |
103 | struct ucma_context *ctx; | |
c8f6a362 | 104 | struct ucma_multicast *mc; |
75216638 SH |
105 | struct list_head list; |
106 | struct rdma_cm_id *cm_id; | |
107 | struct rdma_ucm_event_resp resp; | |
108 | }; | |
109 | ||
110 | static DEFINE_MUTEX(mut); | |
111 | static DEFINE_IDR(ctx_idr); | |
c8f6a362 | 112 | static DEFINE_IDR(multicast_idr); |
75216638 SH |
113 | |
114 | static inline struct ucma_context *_ucma_find_context(int id, | |
115 | struct ucma_file *file) | |
116 | { | |
117 | struct ucma_context *ctx; | |
118 | ||
119 | ctx = idr_find(&ctx_idr, id); | |
120 | if (!ctx) | |
121 | ctx = ERR_PTR(-ENOENT); | |
122 | else if (ctx->file != file) | |
123 | ctx = ERR_PTR(-EINVAL); | |
124 | return ctx; | |
125 | } | |
126 | ||
127 | static struct ucma_context *ucma_get_ctx(struct ucma_file *file, int id) | |
128 | { | |
129 | struct ucma_context *ctx; | |
130 | ||
131 | mutex_lock(&mut); | |
132 | ctx = _ucma_find_context(id, file); | |
133 | if (!IS_ERR(ctx)) | |
134 | atomic_inc(&ctx->ref); | |
135 | mutex_unlock(&mut); | |
136 | return ctx; | |
137 | } | |
138 | ||
139 | static void ucma_put_ctx(struct ucma_context *ctx) | |
140 | { | |
141 | if (atomic_dec_and_test(&ctx->ref)) | |
142 | complete(&ctx->comp); | |
143 | } | |
144 | ||
145 | static struct ucma_context *ucma_alloc_ctx(struct ucma_file *file) | |
146 | { | |
147 | struct ucma_context *ctx; | |
75216638 SH |
148 | |
149 | ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); | |
150 | if (!ctx) | |
151 | return NULL; | |
152 | ||
153 | atomic_set(&ctx->ref, 1); | |
154 | init_completion(&ctx->comp); | |
c8f6a362 | 155 | INIT_LIST_HEAD(&ctx->mc_list); |
75216638 SH |
156 | ctx->file = file; |
157 | ||
3b069c5d TH |
158 | mutex_lock(&mut); |
159 | ctx->id = idr_alloc(&ctx_idr, ctx, 0, 0, GFP_KERNEL); | |
160 | mutex_unlock(&mut); | |
161 | if (ctx->id < 0) | |
75216638 SH |
162 | goto error; |
163 | ||
164 | list_add_tail(&ctx->list, &file->ctx_list); | |
165 | return ctx; | |
166 | ||
167 | error: | |
168 | kfree(ctx); | |
169 | return NULL; | |
170 | } | |
171 | ||
c8f6a362 SH |
172 | static struct ucma_multicast* ucma_alloc_multicast(struct ucma_context *ctx) |
173 | { | |
174 | struct ucma_multicast *mc; | |
c8f6a362 SH |
175 | |
176 | mc = kzalloc(sizeof(*mc), GFP_KERNEL); | |
177 | if (!mc) | |
178 | return NULL; | |
179 | ||
3b069c5d TH |
180 | mutex_lock(&mut); |
181 | mc->id = idr_alloc(&multicast_idr, mc, 0, 0, GFP_KERNEL); | |
182 | mutex_unlock(&mut); | |
183 | if (mc->id < 0) | |
c8f6a362 SH |
184 | goto error; |
185 | ||
186 | mc->ctx = ctx; | |
187 | list_add_tail(&mc->list, &ctx->mc_list); | |
188 | return mc; | |
189 | ||
190 | error: | |
191 | kfree(mc); | |
192 | return NULL; | |
193 | } | |
194 | ||
75216638 SH |
195 | static void ucma_copy_conn_event(struct rdma_ucm_conn_param *dst, |
196 | struct rdma_conn_param *src) | |
197 | { | |
198 | if (src->private_data_len) | |
199 | memcpy(dst->private_data, src->private_data, | |
200 | src->private_data_len); | |
201 | dst->private_data_len = src->private_data_len; | |
202 | dst->responder_resources =src->responder_resources; | |
203 | dst->initiator_depth = src->initiator_depth; | |
204 | dst->flow_control = src->flow_control; | |
205 | dst->retry_count = src->retry_count; | |
206 | dst->rnr_retry_count = src->rnr_retry_count; | |
207 | dst->srq = src->srq; | |
208 | dst->qp_num = src->qp_num; | |
209 | } | |
210 | ||
211 | static void ucma_copy_ud_event(struct rdma_ucm_ud_param *dst, | |
212 | struct rdma_ud_param *src) | |
213 | { | |
214 | if (src->private_data_len) | |
215 | memcpy(dst->private_data, src->private_data, | |
216 | src->private_data_len); | |
217 | dst->private_data_len = src->private_data_len; | |
218 | ib_copy_ah_attr_to_user(&dst->ah_attr, &src->ah_attr); | |
219 | dst->qp_num = src->qp_num; | |
220 | dst->qkey = src->qkey; | |
221 | } | |
222 | ||
223 | static void ucma_set_event_context(struct ucma_context *ctx, | |
224 | struct rdma_cm_event *event, | |
225 | struct ucma_event *uevent) | |
226 | { | |
227 | uevent->ctx = ctx; | |
c8f6a362 SH |
228 | switch (event->event) { |
229 | case RDMA_CM_EVENT_MULTICAST_JOIN: | |
230 | case RDMA_CM_EVENT_MULTICAST_ERROR: | |
231 | uevent->mc = (struct ucma_multicast *) | |
232 | event->param.ud.private_data; | |
233 | uevent->resp.uid = uevent->mc->uid; | |
234 | uevent->resp.id = uevent->mc->id; | |
235 | break; | |
236 | default: | |
237 | uevent->resp.uid = ctx->uid; | |
238 | uevent->resp.id = ctx->id; | |
239 | break; | |
240 | } | |
75216638 SH |
241 | } |
242 | ||
243 | static int ucma_event_handler(struct rdma_cm_id *cm_id, | |
244 | struct rdma_cm_event *event) | |
245 | { | |
246 | struct ucma_event *uevent; | |
247 | struct ucma_context *ctx = cm_id->context; | |
248 | int ret = 0; | |
249 | ||
250 | uevent = kzalloc(sizeof(*uevent), GFP_KERNEL); | |
251 | if (!uevent) | |
252 | return event->event == RDMA_CM_EVENT_CONNECT_REQUEST; | |
253 | ||
418edaab | 254 | mutex_lock(&ctx->file->mut); |
75216638 SH |
255 | uevent->cm_id = cm_id; |
256 | ucma_set_event_context(ctx, event, uevent); | |
257 | uevent->resp.event = event->event; | |
258 | uevent->resp.status = event->status; | |
638ef7a6 | 259 | if (cm_id->qp_type == IB_QPT_UD) |
75216638 SH |
260 | ucma_copy_ud_event(&uevent->resp.param.ud, &event->param.ud); |
261 | else | |
262 | ucma_copy_conn_event(&uevent->resp.param.conn, | |
263 | &event->param.conn); | |
264 | ||
75216638 SH |
265 | if (event->event == RDMA_CM_EVENT_CONNECT_REQUEST) { |
266 | if (!ctx->backlog) { | |
3492856e | 267 | ret = -ENOMEM; |
30a5ec98 | 268 | kfree(uevent); |
75216638 SH |
269 | goto out; |
270 | } | |
271 | ctx->backlog--; | |
0cefcf0b SH |
272 | } else if (!ctx->uid) { |
273 | /* | |
274 | * We ignore events for new connections until userspace has set | |
275 | * their context. This can only happen if an error occurs on a | |
276 | * new connection before the user accepts it. This is okay, | |
277 | * since the accept will just fail later. | |
278 | */ | |
279 | kfree(uevent); | |
280 | goto out; | |
75216638 | 281 | } |
0cefcf0b | 282 | |
75216638 SH |
283 | list_add_tail(&uevent->list, &ctx->file->event_list); |
284 | wake_up_interruptible(&ctx->file->poll_wait); | |
285 | out: | |
286 | mutex_unlock(&ctx->file->mut); | |
287 | return ret; | |
288 | } | |
289 | ||
290 | static ssize_t ucma_get_event(struct ucma_file *file, const char __user *inbuf, | |
291 | int in_len, int out_len) | |
292 | { | |
293 | struct ucma_context *ctx; | |
294 | struct rdma_ucm_get_event cmd; | |
295 | struct ucma_event *uevent; | |
296 | int ret = 0; | |
75216638 SH |
297 | |
298 | if (out_len < sizeof uevent->resp) | |
299 | return -ENOSPC; | |
300 | ||
301 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
302 | return -EFAULT; | |
303 | ||
304 | mutex_lock(&file->mut); | |
305 | while (list_empty(&file->event_list)) { | |
d92f7644 | 306 | mutex_unlock(&file->mut); |
75216638 | 307 | |
d92f7644 SH |
308 | if (file->filp->f_flags & O_NONBLOCK) |
309 | return -EAGAIN; | |
310 | ||
311 | if (wait_event_interruptible(file->poll_wait, | |
312 | !list_empty(&file->event_list))) | |
313 | return -ERESTARTSYS; | |
75216638 | 314 | |
75216638 | 315 | mutex_lock(&file->mut); |
75216638 SH |
316 | } |
317 | ||
75216638 SH |
318 | uevent = list_entry(file->event_list.next, struct ucma_event, list); |
319 | ||
320 | if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) { | |
321 | ctx = ucma_alloc_ctx(file); | |
322 | if (!ctx) { | |
323 | ret = -ENOMEM; | |
324 | goto done; | |
325 | } | |
326 | uevent->ctx->backlog++; | |
327 | ctx->cm_id = uevent->cm_id; | |
328 | ctx->cm_id->context = ctx; | |
329 | uevent->resp.id = ctx->id; | |
330 | } | |
331 | ||
332 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
333 | &uevent->resp, sizeof uevent->resp)) { | |
334 | ret = -EFAULT; | |
335 | goto done; | |
336 | } | |
337 | ||
338 | list_del(&uevent->list); | |
339 | uevent->ctx->events_reported++; | |
c8f6a362 SH |
340 | if (uevent->mc) |
341 | uevent->mc->events_reported++; | |
75216638 SH |
342 | kfree(uevent); |
343 | done: | |
344 | mutex_unlock(&file->mut); | |
345 | return ret; | |
346 | } | |
347 | ||
b26f9b99 SH |
348 | static int ucma_get_qp_type(struct rdma_ucm_create_id *cmd, enum ib_qp_type *qp_type) |
349 | { | |
350 | switch (cmd->ps) { | |
351 | case RDMA_PS_TCP: | |
352 | *qp_type = IB_QPT_RC; | |
353 | return 0; | |
354 | case RDMA_PS_UDP: | |
355 | case RDMA_PS_IPOIB: | |
356 | *qp_type = IB_QPT_UD; | |
357 | return 0; | |
638ef7a6 SH |
358 | case RDMA_PS_IB: |
359 | *qp_type = cmd->qp_type; | |
360 | return 0; | |
b26f9b99 SH |
361 | default: |
362 | return -EINVAL; | |
363 | } | |
364 | } | |
365 | ||
366 | static ssize_t ucma_create_id(struct ucma_file *file, const char __user *inbuf, | |
367 | int in_len, int out_len) | |
75216638 SH |
368 | { |
369 | struct rdma_ucm_create_id cmd; | |
370 | struct rdma_ucm_create_id_resp resp; | |
371 | struct ucma_context *ctx; | |
b26f9b99 | 372 | enum ib_qp_type qp_type; |
75216638 SH |
373 | int ret; |
374 | ||
375 | if (out_len < sizeof(resp)) | |
376 | return -ENOSPC; | |
377 | ||
378 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
379 | return -EFAULT; | |
380 | ||
b26f9b99 SH |
381 | ret = ucma_get_qp_type(&cmd, &qp_type); |
382 | if (ret) | |
383 | return ret; | |
384 | ||
75216638 SH |
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; | |
b26f9b99 | 392 | ctx->cm_id = rdma_create_id(ucma_event_handler, ctx, cmd.ps, qp_type); |
75216638 SH |
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 | ||
c8f6a362 SH |
429 | static void ucma_cleanup_mc_events(struct ucma_multicast *mc) |
430 | { | |
431 | struct ucma_event *uevent, *tmp; | |
432 | ||
433 | list_for_each_entry_safe(uevent, tmp, &mc->ctx->file->event_list, list) { | |
434 | if (uevent->mc != mc) | |
435 | continue; | |
436 | ||
437 | list_del(&uevent->list); | |
438 | kfree(uevent); | |
439 | } | |
440 | } | |
441 | ||
186834b5 HS |
442 | /* |
443 | * We cannot hold file->mut when calling rdma_destroy_id() or we can | |
444 | * deadlock. We also acquire file->mut in ucma_event_handler(), and | |
445 | * rdma_destroy_id() will wait until all callbacks have completed. | |
446 | */ | |
75216638 SH |
447 | static int ucma_free_ctx(struct ucma_context *ctx) |
448 | { | |
449 | int events_reported; | |
186834b5 HS |
450 | struct ucma_event *uevent, *tmp; |
451 | LIST_HEAD(list); | |
75216638 SH |
452 | |
453 | /* No new events will be generated after destroying the id. */ | |
454 | rdma_destroy_id(ctx->cm_id); | |
455 | ||
c8f6a362 SH |
456 | ucma_cleanup_multicast(ctx); |
457 | ||
75216638 SH |
458 | /* Cleanup events not yet reported to the user. */ |
459 | mutex_lock(&ctx->file->mut); | |
186834b5 HS |
460 | list_for_each_entry_safe(uevent, tmp, &ctx->file->event_list, list) { |
461 | if (uevent->ctx == ctx) | |
462 | list_move_tail(&uevent->list, &list); | |
463 | } | |
75216638 SH |
464 | list_del(&ctx->list); |
465 | mutex_unlock(&ctx->file->mut); | |
466 | ||
186834b5 HS |
467 | list_for_each_entry_safe(uevent, tmp, &list, list) { |
468 | list_del(&uevent->list); | |
469 | if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) | |
470 | rdma_destroy_id(uevent->cm_id); | |
471 | kfree(uevent); | |
472 | } | |
473 | ||
75216638 SH |
474 | events_reported = ctx->events_reported; |
475 | kfree(ctx); | |
476 | return events_reported; | |
477 | } | |
478 | ||
479 | static ssize_t ucma_destroy_id(struct ucma_file *file, const char __user *inbuf, | |
480 | int in_len, int out_len) | |
481 | { | |
482 | struct rdma_ucm_destroy_id cmd; | |
483 | struct rdma_ucm_destroy_id_resp resp; | |
484 | struct ucma_context *ctx; | |
485 | int ret = 0; | |
486 | ||
487 | if (out_len < sizeof(resp)) | |
488 | return -ENOSPC; | |
489 | ||
490 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
491 | return -EFAULT; | |
492 | ||
493 | mutex_lock(&mut); | |
494 | ctx = _ucma_find_context(cmd.id, file); | |
495 | if (!IS_ERR(ctx)) | |
496 | idr_remove(&ctx_idr, ctx->id); | |
497 | mutex_unlock(&mut); | |
498 | ||
499 | if (IS_ERR(ctx)) | |
500 | return PTR_ERR(ctx); | |
501 | ||
502 | ucma_put_ctx(ctx); | |
503 | wait_for_completion(&ctx->comp); | |
504 | resp.events_reported = ucma_free_ctx(ctx); | |
505 | ||
506 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
507 | &resp, sizeof(resp))) | |
508 | ret = -EFAULT; | |
509 | ||
510 | return ret; | |
511 | } | |
512 | ||
513 | static ssize_t ucma_bind_addr(struct ucma_file *file, const char __user *inbuf, | |
514 | int in_len, int out_len) | |
515 | { | |
516 | struct rdma_ucm_bind_addr cmd; | |
517 | struct ucma_context *ctx; | |
518 | int ret; | |
519 | ||
520 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
521 | return -EFAULT; | |
522 | ||
523 | ctx = ucma_get_ctx(file, cmd.id); | |
524 | if (IS_ERR(ctx)) | |
525 | return PTR_ERR(ctx); | |
526 | ||
527 | ret = rdma_bind_addr(ctx->cm_id, (struct sockaddr *) &cmd.addr); | |
528 | ucma_put_ctx(ctx); | |
529 | return ret; | |
530 | } | |
531 | ||
532 | static ssize_t ucma_resolve_addr(struct ucma_file *file, | |
533 | const char __user *inbuf, | |
534 | int in_len, int out_len) | |
535 | { | |
536 | struct rdma_ucm_resolve_addr cmd; | |
537 | struct ucma_context *ctx; | |
538 | int ret; | |
539 | ||
540 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
541 | return -EFAULT; | |
542 | ||
543 | ctx = ucma_get_ctx(file, cmd.id); | |
544 | if (IS_ERR(ctx)) | |
545 | return PTR_ERR(ctx); | |
546 | ||
547 | ret = rdma_resolve_addr(ctx->cm_id, (struct sockaddr *) &cmd.src_addr, | |
548 | (struct sockaddr *) &cmd.dst_addr, | |
549 | cmd.timeout_ms); | |
550 | ucma_put_ctx(ctx); | |
551 | return ret; | |
552 | } | |
553 | ||
554 | static ssize_t ucma_resolve_route(struct ucma_file *file, | |
555 | const char __user *inbuf, | |
556 | int in_len, int out_len) | |
557 | { | |
558 | struct rdma_ucm_resolve_route cmd; | |
559 | struct ucma_context *ctx; | |
560 | int ret; | |
561 | ||
562 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
563 | return -EFAULT; | |
564 | ||
565 | ctx = ucma_get_ctx(file, cmd.id); | |
566 | if (IS_ERR(ctx)) | |
567 | return PTR_ERR(ctx); | |
568 | ||
569 | ret = rdma_resolve_route(ctx->cm_id, cmd.timeout_ms); | |
570 | ucma_put_ctx(ctx); | |
571 | return ret; | |
572 | } | |
573 | ||
574 | static void ucma_copy_ib_route(struct rdma_ucm_query_route_resp *resp, | |
575 | struct rdma_route *route) | |
576 | { | |
577 | struct rdma_dev_addr *dev_addr; | |
578 | ||
579 | resp->num_paths = route->num_paths; | |
580 | switch (route->num_paths) { | |
581 | case 0: | |
582 | dev_addr = &route->addr.dev_addr; | |
6f8372b6 SH |
583 | rdma_addr_get_dgid(dev_addr, |
584 | (union ib_gid *) &resp->ib_route[0].dgid); | |
585 | rdma_addr_get_sgid(dev_addr, | |
586 | (union ib_gid *) &resp->ib_route[0].sgid); | |
75216638 SH |
587 | resp->ib_route[0].pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); |
588 | break; | |
589 | case 2: | |
590 | ib_copy_path_rec_to_user(&resp->ib_route[1], | |
591 | &route->path_rec[1]); | |
592 | /* fall through */ | |
593 | case 1: | |
594 | ib_copy_path_rec_to_user(&resp->ib_route[0], | |
595 | &route->path_rec[0]); | |
596 | break; | |
597 | default: | |
598 | break; | |
599 | } | |
600 | } | |
601 | ||
3c86aa70 EC |
602 | static void ucma_copy_iboe_route(struct rdma_ucm_query_route_resp *resp, |
603 | struct rdma_route *route) | |
604 | { | |
605 | struct rdma_dev_addr *dev_addr; | |
af7bd463 EC |
606 | struct net_device *dev; |
607 | u16 vid = 0; | |
3c86aa70 EC |
608 | |
609 | resp->num_paths = route->num_paths; | |
610 | switch (route->num_paths) { | |
611 | case 0: | |
612 | dev_addr = &route->addr.dev_addr; | |
af7bd463 EC |
613 | dev = dev_get_by_index(&init_net, dev_addr->bound_dev_if); |
614 | if (dev) { | |
615 | vid = rdma_vlan_dev_vlan_id(dev); | |
616 | dev_put(dev); | |
617 | } | |
618 | ||
619 | iboe_mac_vlan_to_ll((union ib_gid *) &resp->ib_route[0].dgid, | |
620 | dev_addr->dst_dev_addr, vid); | |
3c86aa70 EC |
621 | iboe_addr_get_sgid(dev_addr, |
622 | (union ib_gid *) &resp->ib_route[0].sgid); | |
623 | resp->ib_route[0].pkey = cpu_to_be16(0xffff); | |
624 | break; | |
625 | case 2: | |
626 | ib_copy_path_rec_to_user(&resp->ib_route[1], | |
627 | &route->path_rec[1]); | |
628 | /* fall through */ | |
629 | case 1: | |
630 | ib_copy_path_rec_to_user(&resp->ib_route[0], | |
631 | &route->path_rec[0]); | |
632 | break; | |
633 | default: | |
634 | break; | |
635 | } | |
636 | } | |
637 | ||
e86f8b06 SW |
638 | static void ucma_copy_iw_route(struct rdma_ucm_query_route_resp *resp, |
639 | struct rdma_route *route) | |
640 | { | |
641 | struct rdma_dev_addr *dev_addr; | |
642 | ||
643 | dev_addr = &route->addr.dev_addr; | |
644 | rdma_addr_get_dgid(dev_addr, (union ib_gid *) &resp->ib_route[0].dgid); | |
645 | rdma_addr_get_sgid(dev_addr, (union ib_gid *) &resp->ib_route[0].sgid); | |
646 | } | |
647 | ||
75216638 SH |
648 | static ssize_t ucma_query_route(struct ucma_file *file, |
649 | const char __user *inbuf, | |
650 | int in_len, int out_len) | |
651 | { | |
652 | struct rdma_ucm_query_route cmd; | |
653 | struct rdma_ucm_query_route_resp resp; | |
654 | struct ucma_context *ctx; | |
655 | struct sockaddr *addr; | |
656 | int ret = 0; | |
657 | ||
658 | if (out_len < sizeof(resp)) | |
659 | return -ENOSPC; | |
660 | ||
661 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
662 | return -EFAULT; | |
663 | ||
664 | ctx = ucma_get_ctx(file, cmd.id); | |
665 | if (IS_ERR(ctx)) | |
666 | return PTR_ERR(ctx); | |
667 | ||
668 | memset(&resp, 0, sizeof resp); | |
3f446754 | 669 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.src_addr; |
75216638 SH |
670 | memcpy(&resp.src_addr, addr, addr->sa_family == AF_INET ? |
671 | sizeof(struct sockaddr_in) : | |
672 | sizeof(struct sockaddr_in6)); | |
3f446754 | 673 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.dst_addr; |
75216638 SH |
674 | memcpy(&resp.dst_addr, addr, addr->sa_family == AF_INET ? |
675 | sizeof(struct sockaddr_in) : | |
676 | sizeof(struct sockaddr_in6)); | |
677 | if (!ctx->cm_id->device) | |
678 | goto out; | |
679 | ||
9cda779c | 680 | resp.node_guid = (__force __u64) ctx->cm_id->device->node_guid; |
75216638 | 681 | resp.port_num = ctx->cm_id->port_num; |
e86f8b06 SW |
682 | switch (rdma_node_get_transport(ctx->cm_id->device->node_type)) { |
683 | case RDMA_TRANSPORT_IB: | |
684 | switch (rdma_port_get_link_layer(ctx->cm_id->device, | |
685 | ctx->cm_id->port_num)) { | |
3c86aa70 EC |
686 | case IB_LINK_LAYER_INFINIBAND: |
687 | ucma_copy_ib_route(&resp, &ctx->cm_id->route); | |
688 | break; | |
689 | case IB_LINK_LAYER_ETHERNET: | |
690 | ucma_copy_iboe_route(&resp, &ctx->cm_id->route); | |
691 | break; | |
692 | default: | |
693 | break; | |
694 | } | |
e86f8b06 SW |
695 | break; |
696 | case RDMA_TRANSPORT_IWARP: | |
697 | ucma_copy_iw_route(&resp, &ctx->cm_id->route); | |
698 | break; | |
699 | default: | |
700 | break; | |
75216638 SH |
701 | } |
702 | ||
703 | out: | |
704 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
705 | &resp, sizeof(resp))) | |
706 | ret = -EFAULT; | |
707 | ||
708 | ucma_put_ctx(ctx); | |
709 | return ret; | |
710 | } | |
711 | ||
712 | static void ucma_copy_conn_param(struct rdma_conn_param *dst, | |
713 | struct rdma_ucm_conn_param *src) | |
714 | { | |
715 | dst->private_data = src->private_data; | |
716 | dst->private_data_len = src->private_data_len; | |
717 | dst->responder_resources =src->responder_resources; | |
718 | dst->initiator_depth = src->initiator_depth; | |
719 | dst->flow_control = src->flow_control; | |
720 | dst->retry_count = src->retry_count; | |
721 | dst->rnr_retry_count = src->rnr_retry_count; | |
722 | dst->srq = src->srq; | |
723 | dst->qp_num = src->qp_num; | |
724 | } | |
725 | ||
726 | static ssize_t ucma_connect(struct ucma_file *file, const char __user *inbuf, | |
727 | int in_len, int out_len) | |
728 | { | |
729 | struct rdma_ucm_connect cmd; | |
730 | struct rdma_conn_param conn_param; | |
731 | struct ucma_context *ctx; | |
732 | int ret; | |
733 | ||
734 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
735 | return -EFAULT; | |
736 | ||
737 | if (!cmd.conn_param.valid) | |
738 | return -EINVAL; | |
739 | ||
740 | ctx = ucma_get_ctx(file, cmd.id); | |
741 | if (IS_ERR(ctx)) | |
742 | return PTR_ERR(ctx); | |
743 | ||
744 | ucma_copy_conn_param(&conn_param, &cmd.conn_param); | |
745 | ret = rdma_connect(ctx->cm_id, &conn_param); | |
746 | ucma_put_ctx(ctx); | |
747 | return ret; | |
748 | } | |
749 | ||
750 | static ssize_t ucma_listen(struct ucma_file *file, const char __user *inbuf, | |
751 | int in_len, int out_len) | |
752 | { | |
753 | struct rdma_ucm_listen cmd; | |
754 | struct ucma_context *ctx; | |
755 | int ret; | |
756 | ||
757 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
758 | return -EFAULT; | |
759 | ||
760 | ctx = ucma_get_ctx(file, cmd.id); | |
761 | if (IS_ERR(ctx)) | |
762 | return PTR_ERR(ctx); | |
763 | ||
97cb7e40 SW |
764 | ctx->backlog = cmd.backlog > 0 && cmd.backlog < max_backlog ? |
765 | cmd.backlog : max_backlog; | |
75216638 SH |
766 | ret = rdma_listen(ctx->cm_id, ctx->backlog); |
767 | ucma_put_ctx(ctx); | |
768 | return ret; | |
769 | } | |
770 | ||
771 | static ssize_t ucma_accept(struct ucma_file *file, const char __user *inbuf, | |
772 | int in_len, int out_len) | |
773 | { | |
774 | struct rdma_ucm_accept cmd; | |
775 | struct rdma_conn_param conn_param; | |
776 | struct ucma_context *ctx; | |
777 | int ret; | |
778 | ||
779 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
780 | return -EFAULT; | |
781 | ||
782 | ctx = ucma_get_ctx(file, cmd.id); | |
783 | if (IS_ERR(ctx)) | |
784 | return PTR_ERR(ctx); | |
785 | ||
786 | if (cmd.conn_param.valid) { | |
75216638 | 787 | ucma_copy_conn_param(&conn_param, &cmd.conn_param); |
9ced69ca | 788 | mutex_lock(&file->mut); |
75216638 | 789 | ret = rdma_accept(ctx->cm_id, &conn_param); |
9ced69ca SH |
790 | if (!ret) |
791 | ctx->uid = cmd.uid; | |
792 | mutex_unlock(&file->mut); | |
75216638 SH |
793 | } else |
794 | ret = rdma_accept(ctx->cm_id, NULL); | |
795 | ||
796 | ucma_put_ctx(ctx); | |
797 | return ret; | |
798 | } | |
799 | ||
800 | static ssize_t ucma_reject(struct ucma_file *file, const char __user *inbuf, | |
801 | int in_len, int out_len) | |
802 | { | |
803 | struct rdma_ucm_reject cmd; | |
804 | struct ucma_context *ctx; | |
805 | int ret; | |
806 | ||
807 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
808 | return -EFAULT; | |
809 | ||
810 | ctx = ucma_get_ctx(file, cmd.id); | |
811 | if (IS_ERR(ctx)) | |
812 | return PTR_ERR(ctx); | |
813 | ||
814 | ret = rdma_reject(ctx->cm_id, cmd.private_data, cmd.private_data_len); | |
815 | ucma_put_ctx(ctx); | |
816 | return ret; | |
817 | } | |
818 | ||
819 | static ssize_t ucma_disconnect(struct ucma_file *file, const char __user *inbuf, | |
820 | int in_len, int out_len) | |
821 | { | |
822 | struct rdma_ucm_disconnect cmd; | |
823 | struct ucma_context *ctx; | |
824 | int ret; | |
825 | ||
826 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
827 | return -EFAULT; | |
828 | ||
829 | ctx = ucma_get_ctx(file, cmd.id); | |
830 | if (IS_ERR(ctx)) | |
831 | return PTR_ERR(ctx); | |
832 | ||
833 | ret = rdma_disconnect(ctx->cm_id); | |
834 | ucma_put_ctx(ctx); | |
835 | return ret; | |
836 | } | |
837 | ||
838 | static ssize_t ucma_init_qp_attr(struct ucma_file *file, | |
839 | const char __user *inbuf, | |
840 | int in_len, int out_len) | |
841 | { | |
842 | struct rdma_ucm_init_qp_attr cmd; | |
843 | struct ib_uverbs_qp_attr resp; | |
844 | struct ucma_context *ctx; | |
845 | struct ib_qp_attr qp_attr; | |
846 | int ret; | |
847 | ||
848 | if (out_len < sizeof(resp)) | |
849 | return -ENOSPC; | |
850 | ||
851 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
852 | return -EFAULT; | |
853 | ||
854 | ctx = ucma_get_ctx(file, cmd.id); | |
855 | if (IS_ERR(ctx)) | |
856 | return PTR_ERR(ctx); | |
857 | ||
858 | resp.qp_attr_mask = 0; | |
859 | memset(&qp_attr, 0, sizeof qp_attr); | |
860 | qp_attr.qp_state = cmd.qp_state; | |
861 | ret = rdma_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask); | |
862 | if (ret) | |
863 | goto out; | |
864 | ||
865 | ib_copy_qp_attr_to_user(&resp, &qp_attr); | |
866 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
867 | &resp, sizeof(resp))) | |
868 | ret = -EFAULT; | |
869 | ||
870 | out: | |
871 | ucma_put_ctx(ctx); | |
872 | return ret; | |
873 | } | |
874 | ||
7ce86409 SH |
875 | static int ucma_set_option_id(struct ucma_context *ctx, int optname, |
876 | void *optval, size_t optlen) | |
877 | { | |
878 | int ret = 0; | |
879 | ||
880 | switch (optname) { | |
881 | case RDMA_OPTION_ID_TOS: | |
882 | if (optlen != sizeof(u8)) { | |
883 | ret = -EINVAL; | |
884 | break; | |
885 | } | |
886 | rdma_set_service_type(ctx->cm_id, *((u8 *) optval)); | |
887 | break; | |
a9bb7912 HS |
888 | case RDMA_OPTION_ID_REUSEADDR: |
889 | if (optlen != sizeof(int)) { | |
890 | ret = -EINVAL; | |
891 | break; | |
892 | } | |
893 | ret = rdma_set_reuseaddr(ctx->cm_id, *((int *) optval) ? 1 : 0); | |
894 | break; | |
68602120 SH |
895 | case RDMA_OPTION_ID_AFONLY: |
896 | if (optlen != sizeof(int)) { | |
897 | ret = -EINVAL; | |
898 | break; | |
899 | } | |
900 | ret = rdma_set_afonly(ctx->cm_id, *((int *) optval) ? 1 : 0); | |
901 | break; | |
7ce86409 SH |
902 | default: |
903 | ret = -ENOSYS; | |
904 | } | |
905 | ||
906 | return ret; | |
907 | } | |
908 | ||
a7ca1f00 SH |
909 | static int ucma_set_ib_path(struct ucma_context *ctx, |
910 | struct ib_path_rec_data *path_data, size_t optlen) | |
911 | { | |
912 | struct ib_sa_path_rec sa_path; | |
913 | struct rdma_cm_event event; | |
914 | int ret; | |
915 | ||
916 | if (optlen % sizeof(*path_data)) | |
917 | return -EINVAL; | |
918 | ||
919 | for (; optlen; optlen -= sizeof(*path_data), path_data++) { | |
920 | if (path_data->flags == (IB_PATH_GMP | IB_PATH_PRIMARY | | |
921 | IB_PATH_BIDIRECTIONAL)) | |
922 | break; | |
923 | } | |
924 | ||
925 | if (!optlen) | |
926 | return -EINVAL; | |
927 | ||
928 | ib_sa_unpack_path(path_data->path_rec, &sa_path); | |
929 | ret = rdma_set_ib_paths(ctx->cm_id, &sa_path, 1); | |
930 | if (ret) | |
931 | return ret; | |
932 | ||
933 | memset(&event, 0, sizeof event); | |
934 | event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; | |
935 | return ucma_event_handler(ctx->cm_id, &event); | |
936 | } | |
937 | ||
938 | static int ucma_set_option_ib(struct ucma_context *ctx, int optname, | |
939 | void *optval, size_t optlen) | |
940 | { | |
941 | int ret; | |
942 | ||
943 | switch (optname) { | |
944 | case RDMA_OPTION_IB_PATH: | |
945 | ret = ucma_set_ib_path(ctx, optval, optlen); | |
946 | break; | |
947 | default: | |
948 | ret = -ENOSYS; | |
949 | } | |
950 | ||
951 | return ret; | |
952 | } | |
953 | ||
7ce86409 SH |
954 | static int ucma_set_option_level(struct ucma_context *ctx, int level, |
955 | int optname, void *optval, size_t optlen) | |
956 | { | |
957 | int ret; | |
958 | ||
959 | switch (level) { | |
960 | case RDMA_OPTION_ID: | |
961 | ret = ucma_set_option_id(ctx, optname, optval, optlen); | |
962 | break; | |
a7ca1f00 SH |
963 | case RDMA_OPTION_IB: |
964 | ret = ucma_set_option_ib(ctx, optname, optval, optlen); | |
965 | break; | |
7ce86409 SH |
966 | default: |
967 | ret = -ENOSYS; | |
968 | } | |
969 | ||
970 | return ret; | |
971 | } | |
972 | ||
973 | static ssize_t ucma_set_option(struct ucma_file *file, const char __user *inbuf, | |
974 | int in_len, int out_len) | |
975 | { | |
976 | struct rdma_ucm_set_option cmd; | |
977 | struct ucma_context *ctx; | |
978 | void *optval; | |
979 | int ret; | |
980 | ||
981 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
982 | return -EFAULT; | |
983 | ||
984 | ctx = ucma_get_ctx(file, cmd.id); | |
985 | if (IS_ERR(ctx)) | |
986 | return PTR_ERR(ctx); | |
987 | ||
0764c76e RD |
988 | optval = memdup_user((void __user *) (unsigned long) cmd.optval, |
989 | cmd.optlen); | |
990 | if (IS_ERR(optval)) { | |
991 | ret = PTR_ERR(optval); | |
992 | goto out; | |
7ce86409 SH |
993 | } |
994 | ||
995 | ret = ucma_set_option_level(ctx, cmd.level, cmd.optname, optval, | |
996 | cmd.optlen); | |
7ce86409 | 997 | kfree(optval); |
0764c76e RD |
998 | |
999 | out: | |
7ce86409 SH |
1000 | ucma_put_ctx(ctx); |
1001 | return ret; | |
1002 | } | |
1003 | ||
75216638 SH |
1004 | static ssize_t ucma_notify(struct ucma_file *file, const char __user *inbuf, |
1005 | int in_len, int out_len) | |
1006 | { | |
1007 | struct rdma_ucm_notify cmd; | |
1008 | struct ucma_context *ctx; | |
1009 | int ret; | |
1010 | ||
1011 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1012 | return -EFAULT; | |
1013 | ||
1014 | ctx = ucma_get_ctx(file, cmd.id); | |
1015 | if (IS_ERR(ctx)) | |
1016 | return PTR_ERR(ctx); | |
1017 | ||
1018 | ret = rdma_notify(ctx->cm_id, (enum ib_event_type) cmd.event); | |
1019 | ucma_put_ctx(ctx); | |
1020 | return ret; | |
1021 | } | |
1022 | ||
c8f6a362 SH |
1023 | static ssize_t ucma_join_multicast(struct ucma_file *file, |
1024 | const char __user *inbuf, | |
1025 | int in_len, int out_len) | |
1026 | { | |
1027 | struct rdma_ucm_join_mcast cmd; | |
1028 | struct rdma_ucm_create_id_resp resp; | |
1029 | struct ucma_context *ctx; | |
1030 | struct ucma_multicast *mc; | |
1031 | int ret; | |
1032 | ||
1033 | if (out_len < sizeof(resp)) | |
1034 | return -ENOSPC; | |
1035 | ||
1036 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1037 | return -EFAULT; | |
1038 | ||
1039 | ctx = ucma_get_ctx(file, cmd.id); | |
1040 | if (IS_ERR(ctx)) | |
1041 | return PTR_ERR(ctx); | |
1042 | ||
1043 | mutex_lock(&file->mut); | |
1044 | mc = ucma_alloc_multicast(ctx); | |
6aea938f JB |
1045 | if (!mc) { |
1046 | ret = -ENOMEM; | |
c8f6a362 SH |
1047 | goto err1; |
1048 | } | |
1049 | ||
1050 | mc->uid = cmd.uid; | |
1051 | memcpy(&mc->addr, &cmd.addr, sizeof cmd.addr); | |
3f446754 | 1052 | ret = rdma_join_multicast(ctx->cm_id, (struct sockaddr *) &mc->addr, mc); |
c8f6a362 SH |
1053 | if (ret) |
1054 | goto err2; | |
1055 | ||
1056 | resp.id = mc->id; | |
1057 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
1058 | &resp, sizeof(resp))) { | |
1059 | ret = -EFAULT; | |
1060 | goto err3; | |
1061 | } | |
1062 | ||
1063 | mutex_unlock(&file->mut); | |
1064 | ucma_put_ctx(ctx); | |
1065 | return 0; | |
1066 | ||
1067 | err3: | |
3f446754 | 1068 | rdma_leave_multicast(ctx->cm_id, (struct sockaddr *) &mc->addr); |
c8f6a362 SH |
1069 | ucma_cleanup_mc_events(mc); |
1070 | err2: | |
1071 | mutex_lock(&mut); | |
1072 | idr_remove(&multicast_idr, mc->id); | |
1073 | mutex_unlock(&mut); | |
1074 | list_del(&mc->list); | |
1075 | kfree(mc); | |
1076 | err1: | |
1077 | mutex_unlock(&file->mut); | |
1078 | ucma_put_ctx(ctx); | |
1079 | return ret; | |
1080 | } | |
1081 | ||
1082 | static ssize_t ucma_leave_multicast(struct ucma_file *file, | |
1083 | const char __user *inbuf, | |
1084 | int in_len, int out_len) | |
1085 | { | |
1086 | struct rdma_ucm_destroy_id cmd; | |
1087 | struct rdma_ucm_destroy_id_resp resp; | |
1088 | struct ucma_multicast *mc; | |
1089 | int ret = 0; | |
1090 | ||
1091 | if (out_len < sizeof(resp)) | |
1092 | return -ENOSPC; | |
1093 | ||
1094 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1095 | return -EFAULT; | |
1096 | ||
1097 | mutex_lock(&mut); | |
1098 | mc = idr_find(&multicast_idr, cmd.id); | |
1099 | if (!mc) | |
1100 | mc = ERR_PTR(-ENOENT); | |
1101 | else if (mc->ctx->file != file) | |
1102 | mc = ERR_PTR(-EINVAL); | |
1103 | else { | |
1104 | idr_remove(&multicast_idr, mc->id); | |
1105 | atomic_inc(&mc->ctx->ref); | |
1106 | } | |
1107 | mutex_unlock(&mut); | |
1108 | ||
1109 | if (IS_ERR(mc)) { | |
1110 | ret = PTR_ERR(mc); | |
1111 | goto out; | |
1112 | } | |
1113 | ||
3f446754 | 1114 | rdma_leave_multicast(mc->ctx->cm_id, (struct sockaddr *) &mc->addr); |
c8f6a362 SH |
1115 | mutex_lock(&mc->ctx->file->mut); |
1116 | ucma_cleanup_mc_events(mc); | |
1117 | list_del(&mc->list); | |
1118 | mutex_unlock(&mc->ctx->file->mut); | |
1119 | ||
1120 | ucma_put_ctx(mc->ctx); | |
1121 | resp.events_reported = mc->events_reported; | |
1122 | kfree(mc); | |
1123 | ||
1124 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
1125 | &resp, sizeof(resp))) | |
1126 | ret = -EFAULT; | |
1127 | out: | |
1128 | return ret; | |
1129 | } | |
1130 | ||
88314e4d SH |
1131 | static void ucma_lock_files(struct ucma_file *file1, struct ucma_file *file2) |
1132 | { | |
1133 | /* Acquire mutex's based on pointer comparison to prevent deadlock. */ | |
1134 | if (file1 < file2) { | |
1135 | mutex_lock(&file1->mut); | |
1136 | mutex_lock(&file2->mut); | |
1137 | } else { | |
1138 | mutex_lock(&file2->mut); | |
1139 | mutex_lock(&file1->mut); | |
1140 | } | |
1141 | } | |
1142 | ||
1143 | static void ucma_unlock_files(struct ucma_file *file1, struct ucma_file *file2) | |
1144 | { | |
1145 | if (file1 < file2) { | |
1146 | mutex_unlock(&file2->mut); | |
1147 | mutex_unlock(&file1->mut); | |
1148 | } else { | |
1149 | mutex_unlock(&file1->mut); | |
1150 | mutex_unlock(&file2->mut); | |
1151 | } | |
1152 | } | |
1153 | ||
1154 | static void ucma_move_events(struct ucma_context *ctx, struct ucma_file *file) | |
1155 | { | |
1156 | struct ucma_event *uevent, *tmp; | |
1157 | ||
1158 | list_for_each_entry_safe(uevent, tmp, &ctx->file->event_list, list) | |
1159 | if (uevent->ctx == ctx) | |
1160 | list_move_tail(&uevent->list, &file->event_list); | |
1161 | } | |
1162 | ||
1163 | static ssize_t ucma_migrate_id(struct ucma_file *new_file, | |
1164 | const char __user *inbuf, | |
1165 | int in_len, int out_len) | |
1166 | { | |
1167 | struct rdma_ucm_migrate_id cmd; | |
1168 | struct rdma_ucm_migrate_resp resp; | |
1169 | struct ucma_context *ctx; | |
2903ff01 | 1170 | struct fd f; |
88314e4d SH |
1171 | struct ucma_file *cur_file; |
1172 | int ret = 0; | |
1173 | ||
1174 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1175 | return -EFAULT; | |
1176 | ||
1177 | /* Get current fd to protect against it being closed */ | |
2903ff01 AV |
1178 | f = fdget(cmd.fd); |
1179 | if (!f.file) | |
88314e4d SH |
1180 | return -ENOENT; |
1181 | ||
1182 | /* Validate current fd and prevent destruction of id. */ | |
2903ff01 | 1183 | ctx = ucma_get_ctx(f.file->private_data, cmd.id); |
88314e4d SH |
1184 | if (IS_ERR(ctx)) { |
1185 | ret = PTR_ERR(ctx); | |
1186 | goto file_put; | |
1187 | } | |
1188 | ||
1189 | cur_file = ctx->file; | |
1190 | if (cur_file == new_file) { | |
1191 | resp.events_reported = ctx->events_reported; | |
1192 | goto response; | |
1193 | } | |
1194 | ||
1195 | /* | |
1196 | * Migrate events between fd's, maintaining order, and avoiding new | |
1197 | * events being added before existing events. | |
1198 | */ | |
1199 | ucma_lock_files(cur_file, new_file); | |
1200 | mutex_lock(&mut); | |
1201 | ||
1202 | list_move_tail(&ctx->list, &new_file->ctx_list); | |
1203 | ucma_move_events(ctx, new_file); | |
1204 | ctx->file = new_file; | |
1205 | resp.events_reported = ctx->events_reported; | |
1206 | ||
1207 | mutex_unlock(&mut); | |
1208 | ucma_unlock_files(cur_file, new_file); | |
1209 | ||
1210 | response: | |
1211 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
1212 | &resp, sizeof(resp))) | |
1213 | ret = -EFAULT; | |
1214 | ||
1215 | ucma_put_ctx(ctx); | |
1216 | file_put: | |
2903ff01 | 1217 | fdput(f); |
88314e4d SH |
1218 | return ret; |
1219 | } | |
1220 | ||
75216638 SH |
1221 | static ssize_t (*ucma_cmd_table[])(struct ucma_file *file, |
1222 | const char __user *inbuf, | |
1223 | int in_len, int out_len) = { | |
1224 | [RDMA_USER_CM_CMD_CREATE_ID] = ucma_create_id, | |
1225 | [RDMA_USER_CM_CMD_DESTROY_ID] = ucma_destroy_id, | |
1226 | [RDMA_USER_CM_CMD_BIND_ADDR] = ucma_bind_addr, | |
1227 | [RDMA_USER_CM_CMD_RESOLVE_ADDR] = ucma_resolve_addr, | |
1228 | [RDMA_USER_CM_CMD_RESOLVE_ROUTE]= ucma_resolve_route, | |
1229 | [RDMA_USER_CM_CMD_QUERY_ROUTE] = ucma_query_route, | |
1230 | [RDMA_USER_CM_CMD_CONNECT] = ucma_connect, | |
1231 | [RDMA_USER_CM_CMD_LISTEN] = ucma_listen, | |
1232 | [RDMA_USER_CM_CMD_ACCEPT] = ucma_accept, | |
1233 | [RDMA_USER_CM_CMD_REJECT] = ucma_reject, | |
1234 | [RDMA_USER_CM_CMD_DISCONNECT] = ucma_disconnect, | |
1235 | [RDMA_USER_CM_CMD_INIT_QP_ATTR] = ucma_init_qp_attr, | |
1236 | [RDMA_USER_CM_CMD_GET_EVENT] = ucma_get_event, | |
1237 | [RDMA_USER_CM_CMD_GET_OPTION] = NULL, | |
7ce86409 | 1238 | [RDMA_USER_CM_CMD_SET_OPTION] = ucma_set_option, |
75216638 | 1239 | [RDMA_USER_CM_CMD_NOTIFY] = ucma_notify, |
c8f6a362 SH |
1240 | [RDMA_USER_CM_CMD_JOIN_MCAST] = ucma_join_multicast, |
1241 | [RDMA_USER_CM_CMD_LEAVE_MCAST] = ucma_leave_multicast, | |
88314e4d | 1242 | [RDMA_USER_CM_CMD_MIGRATE_ID] = ucma_migrate_id |
75216638 SH |
1243 | }; |
1244 | ||
1245 | static ssize_t ucma_write(struct file *filp, const char __user *buf, | |
1246 | size_t len, loff_t *pos) | |
1247 | { | |
1248 | struct ucma_file *file = filp->private_data; | |
1249 | struct rdma_ucm_cmd_hdr hdr; | |
1250 | ssize_t ret; | |
1251 | ||
1252 | if (len < sizeof(hdr)) | |
1253 | return -EINVAL; | |
1254 | ||
1255 | if (copy_from_user(&hdr, buf, sizeof(hdr))) | |
1256 | return -EFAULT; | |
1257 | ||
caf6e3f2 | 1258 | if (hdr.cmd >= ARRAY_SIZE(ucma_cmd_table)) |
75216638 SH |
1259 | return -EINVAL; |
1260 | ||
1261 | if (hdr.in + sizeof(hdr) > len) | |
1262 | return -EINVAL; | |
1263 | ||
1264 | if (!ucma_cmd_table[hdr.cmd]) | |
1265 | return -ENOSYS; | |
1266 | ||
1267 | ret = ucma_cmd_table[hdr.cmd](file, buf + sizeof(hdr), hdr.in, hdr.out); | |
1268 | if (!ret) | |
1269 | ret = len; | |
1270 | ||
1271 | return ret; | |
1272 | } | |
1273 | ||
1274 | static unsigned int ucma_poll(struct file *filp, struct poll_table_struct *wait) | |
1275 | { | |
1276 | struct ucma_file *file = filp->private_data; | |
1277 | unsigned int mask = 0; | |
1278 | ||
1279 | poll_wait(filp, &file->poll_wait, wait); | |
1280 | ||
1281 | if (!list_empty(&file->event_list)) | |
1282 | mask = POLLIN | POLLRDNORM; | |
1283 | ||
1284 | return mask; | |
1285 | } | |
1286 | ||
f7a6117e RD |
1287 | /* |
1288 | * ucma_open() does not need the BKL: | |
1289 | * | |
1290 | * - no global state is referred to; | |
1291 | * - there is no ioctl method to race against; | |
1292 | * - no further module initialization is required for open to work | |
1293 | * after the device is registered. | |
1294 | */ | |
75216638 SH |
1295 | static int ucma_open(struct inode *inode, struct file *filp) |
1296 | { | |
1297 | struct ucma_file *file; | |
1298 | ||
1299 | file = kmalloc(sizeof *file, GFP_KERNEL); | |
1300 | if (!file) | |
1301 | return -ENOMEM; | |
1302 | ||
1303 | INIT_LIST_HEAD(&file->event_list); | |
1304 | INIT_LIST_HEAD(&file->ctx_list); | |
1305 | init_waitqueue_head(&file->poll_wait); | |
1306 | mutex_init(&file->mut); | |
1307 | ||
1308 | filp->private_data = file; | |
1309 | file->filp = filp; | |
bc1db9af RD |
1310 | |
1311 | return nonseekable_open(inode, filp); | |
75216638 SH |
1312 | } |
1313 | ||
1314 | static int ucma_close(struct inode *inode, struct file *filp) | |
1315 | { | |
1316 | struct ucma_file *file = filp->private_data; | |
1317 | struct ucma_context *ctx, *tmp; | |
1318 | ||
1319 | mutex_lock(&file->mut); | |
1320 | list_for_each_entry_safe(ctx, tmp, &file->ctx_list, list) { | |
1321 | mutex_unlock(&file->mut); | |
1322 | ||
1323 | mutex_lock(&mut); | |
1324 | idr_remove(&ctx_idr, ctx->id); | |
1325 | mutex_unlock(&mut); | |
1326 | ||
1327 | ucma_free_ctx(ctx); | |
1328 | mutex_lock(&file->mut); | |
1329 | } | |
1330 | mutex_unlock(&file->mut); | |
1331 | kfree(file); | |
1332 | return 0; | |
1333 | } | |
1334 | ||
2b8693c0 | 1335 | static const struct file_operations ucma_fops = { |
75216638 SH |
1336 | .owner = THIS_MODULE, |
1337 | .open = ucma_open, | |
1338 | .release = ucma_close, | |
1339 | .write = ucma_write, | |
1340 | .poll = ucma_poll, | |
bc1db9af | 1341 | .llseek = no_llseek, |
75216638 SH |
1342 | }; |
1343 | ||
1344 | static struct miscdevice ucma_misc = { | |
04ea2f81 RD |
1345 | .minor = MISC_DYNAMIC_MINOR, |
1346 | .name = "rdma_cm", | |
1347 | .nodename = "infiniband/rdma_cm", | |
1348 | .mode = 0666, | |
1349 | .fops = &ucma_fops, | |
75216638 SH |
1350 | }; |
1351 | ||
1352 | static ssize_t show_abi_version(struct device *dev, | |
1353 | struct device_attribute *attr, | |
1354 | char *buf) | |
1355 | { | |
1356 | return sprintf(buf, "%d\n", RDMA_USER_CM_ABI_VERSION); | |
1357 | } | |
1358 | static DEVICE_ATTR(abi_version, S_IRUGO, show_abi_version, NULL); | |
1359 | ||
1360 | static int __init ucma_init(void) | |
1361 | { | |
1362 | int ret; | |
1363 | ||
1364 | ret = misc_register(&ucma_misc); | |
1365 | if (ret) | |
1366 | return ret; | |
1367 | ||
1368 | ret = device_create_file(ucma_misc.this_device, &dev_attr_abi_version); | |
1369 | if (ret) { | |
1370 | printk(KERN_ERR "rdma_ucm: couldn't create abi_version attr\n"); | |
97cb7e40 SW |
1371 | goto err1; |
1372 | } | |
1373 | ||
ec8f23ce | 1374 | ucma_ctl_table_hdr = register_net_sysctl(&init_net, "net/rdma_ucm", ucma_ctl_table); |
97cb7e40 SW |
1375 | if (!ucma_ctl_table_hdr) { |
1376 | printk(KERN_ERR "rdma_ucm: couldn't register sysctl paths\n"); | |
1377 | ret = -ENOMEM; | |
1378 | goto err2; | |
75216638 SH |
1379 | } |
1380 | return 0; | |
97cb7e40 SW |
1381 | err2: |
1382 | device_remove_file(ucma_misc.this_device, &dev_attr_abi_version); | |
1383 | err1: | |
75216638 SH |
1384 | misc_deregister(&ucma_misc); |
1385 | return ret; | |
1386 | } | |
1387 | ||
1388 | static void __exit ucma_cleanup(void) | |
1389 | { | |
5dd3df10 | 1390 | unregister_net_sysctl_table(ucma_ctl_table_hdr); |
75216638 SH |
1391 | device_remove_file(ucma_misc.this_device, &dev_attr_abi_version); |
1392 | misc_deregister(&ucma_misc); | |
1393 | idr_destroy(&ctx_idr); | |
1394 | } | |
1395 | ||
1396 | module_init(ucma_init); | |
1397 | module_exit(ucma_cleanup); |