Commit | Line | Data |
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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> |
95893dde | 45 | #include <linux/nsproxy.h> |
75216638 SH |
46 | |
47 | #include <rdma/rdma_user_cm.h> | |
48 | #include <rdma/ib_marshall.h> | |
49 | #include <rdma/rdma_cm.h> | |
a7ca1f00 | 50 | #include <rdma/rdma_cm_ib.h> |
ee7aed45 | 51 | #include <rdma/ib_addr.h> |
edaa7a55 | 52 | #include <rdma/ib.h> |
75216638 SH |
53 | |
54 | MODULE_AUTHOR("Sean Hefty"); | |
55 | MODULE_DESCRIPTION("RDMA Userspace Connection Manager Access"); | |
56 | MODULE_LICENSE("Dual BSD/GPL"); | |
57 | ||
97cb7e40 SW |
58 | static unsigned int max_backlog = 1024; |
59 | ||
60 | static struct ctl_table_header *ucma_ctl_table_hdr; | |
f3a5e3e3 | 61 | static struct ctl_table ucma_ctl_table[] = { |
97cb7e40 SW |
62 | { |
63 | .procname = "max_backlog", | |
64 | .data = &max_backlog, | |
65 | .maxlen = sizeof max_backlog, | |
66 | .mode = 0644, | |
67 | .proc_handler = proc_dointvec, | |
68 | }, | |
69 | { } | |
70 | }; | |
71 | ||
75216638 SH |
72 | struct ucma_file { |
73 | struct mutex mut; | |
74 | struct file *filp; | |
75 | struct list_head ctx_list; | |
76 | struct list_head event_list; | |
77 | wait_queue_head_t poll_wait; | |
e1c30298 | 78 | struct workqueue_struct *close_wq; |
75216638 SH |
79 | }; |
80 | ||
81 | struct ucma_context { | |
82 | int id; | |
83 | struct completion comp; | |
84 | atomic_t ref; | |
85 | int events_reported; | |
86 | int backlog; | |
87 | ||
88 | struct ucma_file *file; | |
89 | struct rdma_cm_id *cm_id; | |
90 | u64 uid; | |
91 | ||
92 | struct list_head list; | |
c8f6a362 | 93 | struct list_head mc_list; |
e1c30298 YH |
94 | /* mark that device is in process of destroying the internal HW |
95 | * resources, protected by the global mut | |
96 | */ | |
97 | int closing; | |
98 | /* sync between removal event and id destroy, protected by file mut */ | |
99 | int destroying; | |
100 | struct work_struct close_work; | |
c8f6a362 SH |
101 | }; |
102 | ||
103 | struct ucma_multicast { | |
104 | struct ucma_context *ctx; | |
105 | int id; | |
106 | int events_reported; | |
107 | ||
108 | u64 uid; | |
109 | struct list_head list; | |
3f446754 | 110 | struct sockaddr_storage addr; |
75216638 SH |
111 | }; |
112 | ||
113 | struct ucma_event { | |
114 | struct ucma_context *ctx; | |
c8f6a362 | 115 | struct ucma_multicast *mc; |
75216638 SH |
116 | struct list_head list; |
117 | struct rdma_cm_id *cm_id; | |
118 | struct rdma_ucm_event_resp resp; | |
e1c30298 | 119 | struct work_struct close_work; |
75216638 SH |
120 | }; |
121 | ||
122 | static DEFINE_MUTEX(mut); | |
123 | static DEFINE_IDR(ctx_idr); | |
c8f6a362 | 124 | static DEFINE_IDR(multicast_idr); |
75216638 SH |
125 | |
126 | static inline struct ucma_context *_ucma_find_context(int id, | |
127 | struct ucma_file *file) | |
128 | { | |
129 | struct ucma_context *ctx; | |
130 | ||
131 | ctx = idr_find(&ctx_idr, id); | |
132 | if (!ctx) | |
133 | ctx = ERR_PTR(-ENOENT); | |
134 | else if (ctx->file != file) | |
135 | ctx = ERR_PTR(-EINVAL); | |
136 | return ctx; | |
137 | } | |
138 | ||
139 | static struct ucma_context *ucma_get_ctx(struct ucma_file *file, int id) | |
140 | { | |
141 | struct ucma_context *ctx; | |
142 | ||
143 | mutex_lock(&mut); | |
144 | ctx = _ucma_find_context(id, file); | |
e1c30298 YH |
145 | if (!IS_ERR(ctx)) { |
146 | if (ctx->closing) | |
147 | ctx = ERR_PTR(-EIO); | |
148 | else | |
149 | atomic_inc(&ctx->ref); | |
150 | } | |
75216638 SH |
151 | mutex_unlock(&mut); |
152 | return ctx; | |
153 | } | |
154 | ||
155 | static void ucma_put_ctx(struct ucma_context *ctx) | |
156 | { | |
157 | if (atomic_dec_and_test(&ctx->ref)) | |
158 | complete(&ctx->comp); | |
159 | } | |
160 | ||
e1c30298 YH |
161 | static void ucma_close_event_id(struct work_struct *work) |
162 | { | |
163 | struct ucma_event *uevent_close = container_of(work, struct ucma_event, close_work); | |
164 | ||
165 | rdma_destroy_id(uevent_close->cm_id); | |
166 | kfree(uevent_close); | |
167 | } | |
168 | ||
169 | static void ucma_close_id(struct work_struct *work) | |
170 | { | |
171 | struct ucma_context *ctx = container_of(work, struct ucma_context, close_work); | |
172 | ||
173 | /* once all inflight tasks are finished, we close all underlying | |
174 | * resources. The context is still alive till its explicit destryoing | |
175 | * by its creator. | |
176 | */ | |
177 | ucma_put_ctx(ctx); | |
178 | wait_for_completion(&ctx->comp); | |
179 | /* No new events will be generated after destroying the id. */ | |
180 | rdma_destroy_id(ctx->cm_id); | |
181 | } | |
182 | ||
75216638 SH |
183 | static struct ucma_context *ucma_alloc_ctx(struct ucma_file *file) |
184 | { | |
185 | struct ucma_context *ctx; | |
75216638 SH |
186 | |
187 | ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); | |
188 | if (!ctx) | |
189 | return NULL; | |
190 | ||
e1c30298 | 191 | INIT_WORK(&ctx->close_work, ucma_close_id); |
75216638 SH |
192 | atomic_set(&ctx->ref, 1); |
193 | init_completion(&ctx->comp); | |
c8f6a362 | 194 | INIT_LIST_HEAD(&ctx->mc_list); |
75216638 SH |
195 | ctx->file = file; |
196 | ||
3b069c5d TH |
197 | mutex_lock(&mut); |
198 | ctx->id = idr_alloc(&ctx_idr, ctx, 0, 0, GFP_KERNEL); | |
199 | mutex_unlock(&mut); | |
200 | if (ctx->id < 0) | |
75216638 SH |
201 | goto error; |
202 | ||
203 | list_add_tail(&ctx->list, &file->ctx_list); | |
204 | return ctx; | |
205 | ||
206 | error: | |
207 | kfree(ctx); | |
208 | return NULL; | |
209 | } | |
210 | ||
c8f6a362 SH |
211 | static struct ucma_multicast* ucma_alloc_multicast(struct ucma_context *ctx) |
212 | { | |
213 | struct ucma_multicast *mc; | |
c8f6a362 SH |
214 | |
215 | mc = kzalloc(sizeof(*mc), GFP_KERNEL); | |
216 | if (!mc) | |
217 | return NULL; | |
218 | ||
3b069c5d TH |
219 | mutex_lock(&mut); |
220 | mc->id = idr_alloc(&multicast_idr, mc, 0, 0, GFP_KERNEL); | |
221 | mutex_unlock(&mut); | |
222 | if (mc->id < 0) | |
c8f6a362 SH |
223 | goto error; |
224 | ||
225 | mc->ctx = ctx; | |
226 | list_add_tail(&mc->list, &ctx->mc_list); | |
227 | return mc; | |
228 | ||
229 | error: | |
230 | kfree(mc); | |
231 | return NULL; | |
232 | } | |
233 | ||
75216638 SH |
234 | static void ucma_copy_conn_event(struct rdma_ucm_conn_param *dst, |
235 | struct rdma_conn_param *src) | |
236 | { | |
237 | if (src->private_data_len) | |
238 | memcpy(dst->private_data, src->private_data, | |
239 | src->private_data_len); | |
240 | dst->private_data_len = src->private_data_len; | |
241 | dst->responder_resources =src->responder_resources; | |
242 | dst->initiator_depth = src->initiator_depth; | |
243 | dst->flow_control = src->flow_control; | |
244 | dst->retry_count = src->retry_count; | |
245 | dst->rnr_retry_count = src->rnr_retry_count; | |
246 | dst->srq = src->srq; | |
247 | dst->qp_num = src->qp_num; | |
248 | } | |
249 | ||
250 | static void ucma_copy_ud_event(struct rdma_ucm_ud_param *dst, | |
251 | struct rdma_ud_param *src) | |
252 | { | |
253 | if (src->private_data_len) | |
254 | memcpy(dst->private_data, src->private_data, | |
255 | src->private_data_len); | |
256 | dst->private_data_len = src->private_data_len; | |
257 | ib_copy_ah_attr_to_user(&dst->ah_attr, &src->ah_attr); | |
258 | dst->qp_num = src->qp_num; | |
259 | dst->qkey = src->qkey; | |
260 | } | |
261 | ||
262 | static void ucma_set_event_context(struct ucma_context *ctx, | |
263 | struct rdma_cm_event *event, | |
264 | struct ucma_event *uevent) | |
265 | { | |
266 | uevent->ctx = ctx; | |
c8f6a362 SH |
267 | switch (event->event) { |
268 | case RDMA_CM_EVENT_MULTICAST_JOIN: | |
269 | case RDMA_CM_EVENT_MULTICAST_ERROR: | |
270 | uevent->mc = (struct ucma_multicast *) | |
271 | event->param.ud.private_data; | |
272 | uevent->resp.uid = uevent->mc->uid; | |
273 | uevent->resp.id = uevent->mc->id; | |
274 | break; | |
275 | default: | |
276 | uevent->resp.uid = ctx->uid; | |
277 | uevent->resp.id = ctx->id; | |
278 | break; | |
279 | } | |
75216638 SH |
280 | } |
281 | ||
e1c30298 YH |
282 | /* Called with file->mut locked for the relevant context. */ |
283 | static void ucma_removal_event_handler(struct rdma_cm_id *cm_id) | |
284 | { | |
285 | struct ucma_context *ctx = cm_id->context; | |
286 | struct ucma_event *con_req_eve; | |
287 | int event_found = 0; | |
288 | ||
289 | if (ctx->destroying) | |
290 | return; | |
291 | ||
292 | /* only if context is pointing to cm_id that it owns it and can be | |
293 | * queued to be closed, otherwise that cm_id is an inflight one that | |
294 | * is part of that context event list pending to be detached and | |
295 | * reattached to its new context as part of ucma_get_event, | |
296 | * handled separately below. | |
297 | */ | |
298 | if (ctx->cm_id == cm_id) { | |
299 | mutex_lock(&mut); | |
300 | ctx->closing = 1; | |
301 | mutex_unlock(&mut); | |
302 | queue_work(ctx->file->close_wq, &ctx->close_work); | |
303 | return; | |
304 | } | |
305 | ||
306 | list_for_each_entry(con_req_eve, &ctx->file->event_list, list) { | |
307 | if (con_req_eve->cm_id == cm_id && | |
308 | con_req_eve->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) { | |
309 | list_del(&con_req_eve->list); | |
310 | INIT_WORK(&con_req_eve->close_work, ucma_close_event_id); | |
311 | queue_work(ctx->file->close_wq, &con_req_eve->close_work); | |
312 | event_found = 1; | |
313 | break; | |
314 | } | |
315 | } | |
316 | if (!event_found) | |
317 | printk(KERN_ERR "ucma_removal_event_handler: warning: connect request event wasn't found\n"); | |
318 | } | |
319 | ||
75216638 SH |
320 | static int ucma_event_handler(struct rdma_cm_id *cm_id, |
321 | struct rdma_cm_event *event) | |
322 | { | |
323 | struct ucma_event *uevent; | |
324 | struct ucma_context *ctx = cm_id->context; | |
325 | int ret = 0; | |
326 | ||
327 | uevent = kzalloc(sizeof(*uevent), GFP_KERNEL); | |
328 | if (!uevent) | |
329 | return event->event == RDMA_CM_EVENT_CONNECT_REQUEST; | |
330 | ||
418edaab | 331 | mutex_lock(&ctx->file->mut); |
75216638 SH |
332 | uevent->cm_id = cm_id; |
333 | ucma_set_event_context(ctx, event, uevent); | |
334 | uevent->resp.event = event->event; | |
335 | uevent->resp.status = event->status; | |
638ef7a6 | 336 | if (cm_id->qp_type == IB_QPT_UD) |
75216638 SH |
337 | ucma_copy_ud_event(&uevent->resp.param.ud, &event->param.ud); |
338 | else | |
339 | ucma_copy_conn_event(&uevent->resp.param.conn, | |
340 | &event->param.conn); | |
341 | ||
75216638 SH |
342 | if (event->event == RDMA_CM_EVENT_CONNECT_REQUEST) { |
343 | if (!ctx->backlog) { | |
3492856e | 344 | ret = -ENOMEM; |
30a5ec98 | 345 | kfree(uevent); |
75216638 SH |
346 | goto out; |
347 | } | |
348 | ctx->backlog--; | |
c6b21824 | 349 | } else if (!ctx->uid || ctx->cm_id != cm_id) { |
0cefcf0b SH |
350 | /* |
351 | * We ignore events for new connections until userspace has set | |
352 | * their context. This can only happen if an error occurs on a | |
353 | * new connection before the user accepts it. This is okay, | |
e1c30298 YH |
354 | * since the accept will just fail later. However, we do need |
355 | * to release the underlying HW resources in case of a device | |
356 | * removal event. | |
0cefcf0b | 357 | */ |
e1c30298 YH |
358 | if (event->event == RDMA_CM_EVENT_DEVICE_REMOVAL) |
359 | ucma_removal_event_handler(cm_id); | |
360 | ||
0cefcf0b SH |
361 | kfree(uevent); |
362 | goto out; | |
75216638 | 363 | } |
0cefcf0b | 364 | |
75216638 SH |
365 | list_add_tail(&uevent->list, &ctx->file->event_list); |
366 | wake_up_interruptible(&ctx->file->poll_wait); | |
e1c30298 YH |
367 | if (event->event == RDMA_CM_EVENT_DEVICE_REMOVAL) |
368 | ucma_removal_event_handler(cm_id); | |
75216638 SH |
369 | out: |
370 | mutex_unlock(&ctx->file->mut); | |
371 | return ret; | |
372 | } | |
373 | ||
374 | static ssize_t ucma_get_event(struct ucma_file *file, const char __user *inbuf, | |
375 | int in_len, int out_len) | |
376 | { | |
377 | struct ucma_context *ctx; | |
378 | struct rdma_ucm_get_event cmd; | |
379 | struct ucma_event *uevent; | |
380 | int ret = 0; | |
75216638 SH |
381 | |
382 | if (out_len < sizeof uevent->resp) | |
383 | return -ENOSPC; | |
384 | ||
385 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
386 | return -EFAULT; | |
387 | ||
388 | mutex_lock(&file->mut); | |
389 | while (list_empty(&file->event_list)) { | |
d92f7644 | 390 | mutex_unlock(&file->mut); |
75216638 | 391 | |
d92f7644 SH |
392 | if (file->filp->f_flags & O_NONBLOCK) |
393 | return -EAGAIN; | |
394 | ||
395 | if (wait_event_interruptible(file->poll_wait, | |
396 | !list_empty(&file->event_list))) | |
397 | return -ERESTARTSYS; | |
75216638 | 398 | |
75216638 | 399 | mutex_lock(&file->mut); |
75216638 SH |
400 | } |
401 | ||
75216638 SH |
402 | uevent = list_entry(file->event_list.next, struct ucma_event, list); |
403 | ||
404 | if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) { | |
405 | ctx = ucma_alloc_ctx(file); | |
406 | if (!ctx) { | |
407 | ret = -ENOMEM; | |
408 | goto done; | |
409 | } | |
410 | uevent->ctx->backlog++; | |
411 | ctx->cm_id = uevent->cm_id; | |
412 | ctx->cm_id->context = ctx; | |
413 | uevent->resp.id = ctx->id; | |
414 | } | |
415 | ||
416 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
417 | &uevent->resp, sizeof uevent->resp)) { | |
418 | ret = -EFAULT; | |
419 | goto done; | |
420 | } | |
421 | ||
422 | list_del(&uevent->list); | |
423 | uevent->ctx->events_reported++; | |
c8f6a362 SH |
424 | if (uevent->mc) |
425 | uevent->mc->events_reported++; | |
75216638 SH |
426 | kfree(uevent); |
427 | done: | |
428 | mutex_unlock(&file->mut); | |
429 | return ret; | |
430 | } | |
431 | ||
b26f9b99 SH |
432 | static int ucma_get_qp_type(struct rdma_ucm_create_id *cmd, enum ib_qp_type *qp_type) |
433 | { | |
434 | switch (cmd->ps) { | |
435 | case RDMA_PS_TCP: | |
436 | *qp_type = IB_QPT_RC; | |
437 | return 0; | |
438 | case RDMA_PS_UDP: | |
439 | case RDMA_PS_IPOIB: | |
440 | *qp_type = IB_QPT_UD; | |
441 | return 0; | |
638ef7a6 SH |
442 | case RDMA_PS_IB: |
443 | *qp_type = cmd->qp_type; | |
444 | return 0; | |
b26f9b99 SH |
445 | default: |
446 | return -EINVAL; | |
447 | } | |
448 | } | |
449 | ||
450 | static ssize_t ucma_create_id(struct ucma_file *file, const char __user *inbuf, | |
451 | int in_len, int out_len) | |
75216638 SH |
452 | { |
453 | struct rdma_ucm_create_id cmd; | |
454 | struct rdma_ucm_create_id_resp resp; | |
455 | struct ucma_context *ctx; | |
b26f9b99 | 456 | enum ib_qp_type qp_type; |
75216638 SH |
457 | int ret; |
458 | ||
459 | if (out_len < sizeof(resp)) | |
460 | return -ENOSPC; | |
461 | ||
462 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
463 | return -EFAULT; | |
464 | ||
b26f9b99 SH |
465 | ret = ucma_get_qp_type(&cmd, &qp_type); |
466 | if (ret) | |
467 | return ret; | |
468 | ||
75216638 SH |
469 | mutex_lock(&file->mut); |
470 | ctx = ucma_alloc_ctx(file); | |
471 | mutex_unlock(&file->mut); | |
472 | if (!ctx) | |
473 | return -ENOMEM; | |
474 | ||
475 | ctx->uid = cmd.uid; | |
95893dde GS |
476 | ctx->cm_id = rdma_create_id(current->nsproxy->net_ns, |
477 | ucma_event_handler, ctx, cmd.ps, qp_type); | |
75216638 SH |
478 | if (IS_ERR(ctx->cm_id)) { |
479 | ret = PTR_ERR(ctx->cm_id); | |
480 | goto err1; | |
481 | } | |
482 | ||
483 | resp.id = ctx->id; | |
484 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
485 | &resp, sizeof(resp))) { | |
486 | ret = -EFAULT; | |
487 | goto err2; | |
488 | } | |
489 | return 0; | |
490 | ||
491 | err2: | |
492 | rdma_destroy_id(ctx->cm_id); | |
493 | err1: | |
494 | mutex_lock(&mut); | |
495 | idr_remove(&ctx_idr, ctx->id); | |
496 | mutex_unlock(&mut); | |
497 | kfree(ctx); | |
498 | return ret; | |
499 | } | |
500 | ||
c8f6a362 SH |
501 | static void ucma_cleanup_multicast(struct ucma_context *ctx) |
502 | { | |
503 | struct ucma_multicast *mc, *tmp; | |
504 | ||
505 | mutex_lock(&mut); | |
506 | list_for_each_entry_safe(mc, tmp, &ctx->mc_list, list) { | |
507 | list_del(&mc->list); | |
508 | idr_remove(&multicast_idr, mc->id); | |
509 | kfree(mc); | |
510 | } | |
511 | mutex_unlock(&mut); | |
512 | } | |
513 | ||
c8f6a362 SH |
514 | static void ucma_cleanup_mc_events(struct ucma_multicast *mc) |
515 | { | |
516 | struct ucma_event *uevent, *tmp; | |
517 | ||
518 | list_for_each_entry_safe(uevent, tmp, &mc->ctx->file->event_list, list) { | |
519 | if (uevent->mc != mc) | |
520 | continue; | |
521 | ||
522 | list_del(&uevent->list); | |
523 | kfree(uevent); | |
524 | } | |
525 | } | |
526 | ||
186834b5 | 527 | /* |
e1c30298 YH |
528 | * ucma_free_ctx is called after the underlying rdma CM-ID is destroyed. At |
529 | * this point, no new events will be reported from the hardware. However, we | |
530 | * still need to cleanup the UCMA context for this ID. Specifically, there | |
531 | * might be events that have not yet been consumed by the user space software. | |
532 | * These might include pending connect requests which we have not completed | |
533 | * processing. We cannot call rdma_destroy_id while holding the lock of the | |
534 | * context (file->mut), as it might cause a deadlock. We therefore extract all | |
535 | * relevant events from the context pending events list while holding the | |
536 | * mutex. After that we release them as needed. | |
186834b5 | 537 | */ |
75216638 SH |
538 | static int ucma_free_ctx(struct ucma_context *ctx) |
539 | { | |
540 | int events_reported; | |
186834b5 HS |
541 | struct ucma_event *uevent, *tmp; |
542 | LIST_HEAD(list); | |
75216638 | 543 | |
75216638 | 544 | |
c8f6a362 SH |
545 | ucma_cleanup_multicast(ctx); |
546 | ||
75216638 SH |
547 | /* Cleanup events not yet reported to the user. */ |
548 | mutex_lock(&ctx->file->mut); | |
186834b5 HS |
549 | list_for_each_entry_safe(uevent, tmp, &ctx->file->event_list, list) { |
550 | if (uevent->ctx == ctx) | |
551 | list_move_tail(&uevent->list, &list); | |
552 | } | |
75216638 SH |
553 | list_del(&ctx->list); |
554 | mutex_unlock(&ctx->file->mut); | |
555 | ||
186834b5 HS |
556 | list_for_each_entry_safe(uevent, tmp, &list, list) { |
557 | list_del(&uevent->list); | |
558 | if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) | |
559 | rdma_destroy_id(uevent->cm_id); | |
560 | kfree(uevent); | |
561 | } | |
562 | ||
75216638 SH |
563 | events_reported = ctx->events_reported; |
564 | kfree(ctx); | |
565 | return events_reported; | |
566 | } | |
567 | ||
568 | static ssize_t ucma_destroy_id(struct ucma_file *file, const char __user *inbuf, | |
569 | int in_len, int out_len) | |
570 | { | |
571 | struct rdma_ucm_destroy_id cmd; | |
572 | struct rdma_ucm_destroy_id_resp resp; | |
573 | struct ucma_context *ctx; | |
574 | int ret = 0; | |
575 | ||
576 | if (out_len < sizeof(resp)) | |
577 | return -ENOSPC; | |
578 | ||
579 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
580 | return -EFAULT; | |
581 | ||
582 | mutex_lock(&mut); | |
583 | ctx = _ucma_find_context(cmd.id, file); | |
584 | if (!IS_ERR(ctx)) | |
585 | idr_remove(&ctx_idr, ctx->id); | |
586 | mutex_unlock(&mut); | |
587 | ||
588 | if (IS_ERR(ctx)) | |
589 | return PTR_ERR(ctx); | |
590 | ||
e1c30298 YH |
591 | mutex_lock(&ctx->file->mut); |
592 | ctx->destroying = 1; | |
593 | mutex_unlock(&ctx->file->mut); | |
594 | ||
595 | flush_workqueue(ctx->file->close_wq); | |
596 | /* At this point it's guaranteed that there is no inflight | |
597 | * closing task */ | |
598 | mutex_lock(&mut); | |
599 | if (!ctx->closing) { | |
600 | mutex_unlock(&mut); | |
601 | ucma_put_ctx(ctx); | |
602 | wait_for_completion(&ctx->comp); | |
603 | rdma_destroy_id(ctx->cm_id); | |
604 | } else { | |
605 | mutex_unlock(&mut); | |
606 | } | |
75216638 | 607 | |
e1c30298 | 608 | resp.events_reported = ucma_free_ctx(ctx); |
75216638 SH |
609 | if (copy_to_user((void __user *)(unsigned long)cmd.response, |
610 | &resp, sizeof(resp))) | |
611 | ret = -EFAULT; | |
612 | ||
613 | return ret; | |
614 | } | |
615 | ||
05ad9457 | 616 | static ssize_t ucma_bind_ip(struct ucma_file *file, const char __user *inbuf, |
75216638 SH |
617 | int in_len, int out_len) |
618 | { | |
05ad9457 | 619 | struct rdma_ucm_bind_ip cmd; |
75216638 SH |
620 | struct ucma_context *ctx; |
621 | int ret; | |
622 | ||
623 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
624 | return -EFAULT; | |
625 | ||
626 | ctx = ucma_get_ctx(file, cmd.id); | |
627 | if (IS_ERR(ctx)) | |
628 | return PTR_ERR(ctx); | |
629 | ||
630 | ret = rdma_bind_addr(ctx->cm_id, (struct sockaddr *) &cmd.addr); | |
631 | ucma_put_ctx(ctx); | |
632 | return ret; | |
633 | } | |
634 | ||
eebe4c3a SH |
635 | static ssize_t ucma_bind(struct ucma_file *file, const char __user *inbuf, |
636 | int in_len, int out_len) | |
637 | { | |
638 | struct rdma_ucm_bind cmd; | |
639 | struct sockaddr *addr; | |
640 | struct ucma_context *ctx; | |
641 | int ret; | |
642 | ||
643 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
644 | return -EFAULT; | |
645 | ||
646 | addr = (struct sockaddr *) &cmd.addr; | |
647 | if (cmd.reserved || !cmd.addr_size || (cmd.addr_size != rdma_addr_size(addr))) | |
648 | return -EINVAL; | |
649 | ||
650 | ctx = ucma_get_ctx(file, cmd.id); | |
651 | if (IS_ERR(ctx)) | |
652 | return PTR_ERR(ctx); | |
653 | ||
654 | ret = rdma_bind_addr(ctx->cm_id, addr); | |
655 | ucma_put_ctx(ctx); | |
656 | return ret; | |
657 | } | |
658 | ||
05ad9457 SH |
659 | static ssize_t ucma_resolve_ip(struct ucma_file *file, |
660 | const char __user *inbuf, | |
661 | int in_len, int out_len) | |
75216638 | 662 | { |
05ad9457 | 663 | struct rdma_ucm_resolve_ip cmd; |
75216638 SH |
664 | struct ucma_context *ctx; |
665 | int ret; | |
666 | ||
667 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
668 | return -EFAULT; | |
669 | ||
670 | ctx = ucma_get_ctx(file, cmd.id); | |
671 | if (IS_ERR(ctx)) | |
672 | return PTR_ERR(ctx); | |
673 | ||
674 | ret = rdma_resolve_addr(ctx->cm_id, (struct sockaddr *) &cmd.src_addr, | |
675 | (struct sockaddr *) &cmd.dst_addr, | |
676 | cmd.timeout_ms); | |
677 | ucma_put_ctx(ctx); | |
678 | return ret; | |
679 | } | |
680 | ||
209cf2a7 SH |
681 | static ssize_t ucma_resolve_addr(struct ucma_file *file, |
682 | const char __user *inbuf, | |
683 | int in_len, int out_len) | |
684 | { | |
685 | struct rdma_ucm_resolve_addr cmd; | |
686 | struct sockaddr *src, *dst; | |
687 | struct ucma_context *ctx; | |
688 | int ret; | |
689 | ||
690 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
691 | return -EFAULT; | |
692 | ||
693 | src = (struct sockaddr *) &cmd.src_addr; | |
694 | dst = (struct sockaddr *) &cmd.dst_addr; | |
695 | if (cmd.reserved || (cmd.src_size && (cmd.src_size != rdma_addr_size(src))) || | |
696 | !cmd.dst_size || (cmd.dst_size != rdma_addr_size(dst))) | |
697 | return -EINVAL; | |
698 | ||
699 | ctx = ucma_get_ctx(file, cmd.id); | |
700 | if (IS_ERR(ctx)) | |
701 | return PTR_ERR(ctx); | |
702 | ||
703 | ret = rdma_resolve_addr(ctx->cm_id, src, dst, cmd.timeout_ms); | |
704 | ucma_put_ctx(ctx); | |
705 | return ret; | |
706 | } | |
707 | ||
75216638 SH |
708 | static ssize_t ucma_resolve_route(struct ucma_file *file, |
709 | const char __user *inbuf, | |
710 | int in_len, int out_len) | |
711 | { | |
712 | struct rdma_ucm_resolve_route cmd; | |
713 | struct ucma_context *ctx; | |
714 | int ret; | |
715 | ||
716 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
717 | return -EFAULT; | |
718 | ||
719 | ctx = ucma_get_ctx(file, cmd.id); | |
720 | if (IS_ERR(ctx)) | |
721 | return PTR_ERR(ctx); | |
722 | ||
723 | ret = rdma_resolve_route(ctx->cm_id, cmd.timeout_ms); | |
724 | ucma_put_ctx(ctx); | |
725 | return ret; | |
726 | } | |
727 | ||
728 | static void ucma_copy_ib_route(struct rdma_ucm_query_route_resp *resp, | |
729 | struct rdma_route *route) | |
730 | { | |
731 | struct rdma_dev_addr *dev_addr; | |
732 | ||
733 | resp->num_paths = route->num_paths; | |
734 | switch (route->num_paths) { | |
735 | case 0: | |
736 | dev_addr = &route->addr.dev_addr; | |
6f8372b6 SH |
737 | rdma_addr_get_dgid(dev_addr, |
738 | (union ib_gid *) &resp->ib_route[0].dgid); | |
739 | rdma_addr_get_sgid(dev_addr, | |
740 | (union ib_gid *) &resp->ib_route[0].sgid); | |
75216638 SH |
741 | resp->ib_route[0].pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); |
742 | break; | |
743 | case 2: | |
744 | ib_copy_path_rec_to_user(&resp->ib_route[1], | |
745 | &route->path_rec[1]); | |
746 | /* fall through */ | |
747 | case 1: | |
748 | ib_copy_path_rec_to_user(&resp->ib_route[0], | |
749 | &route->path_rec[0]); | |
750 | break; | |
751 | default: | |
752 | break; | |
753 | } | |
754 | } | |
755 | ||
3c86aa70 EC |
756 | static void ucma_copy_iboe_route(struct rdma_ucm_query_route_resp *resp, |
757 | struct rdma_route *route) | |
758 | { | |
3c86aa70 EC |
759 | |
760 | resp->num_paths = route->num_paths; | |
761 | switch (route->num_paths) { | |
762 | case 0: | |
7b85627b MS |
763 | rdma_ip2gid((struct sockaddr *)&route->addr.dst_addr, |
764 | (union ib_gid *)&resp->ib_route[0].dgid); | |
765 | rdma_ip2gid((struct sockaddr *)&route->addr.src_addr, | |
766 | (union ib_gid *)&resp->ib_route[0].sgid); | |
3c86aa70 EC |
767 | resp->ib_route[0].pkey = cpu_to_be16(0xffff); |
768 | break; | |
769 | case 2: | |
770 | ib_copy_path_rec_to_user(&resp->ib_route[1], | |
771 | &route->path_rec[1]); | |
772 | /* fall through */ | |
773 | case 1: | |
774 | ib_copy_path_rec_to_user(&resp->ib_route[0], | |
775 | &route->path_rec[0]); | |
776 | break; | |
777 | default: | |
778 | break; | |
779 | } | |
780 | } | |
781 | ||
e86f8b06 SW |
782 | static void ucma_copy_iw_route(struct rdma_ucm_query_route_resp *resp, |
783 | struct rdma_route *route) | |
784 | { | |
785 | struct rdma_dev_addr *dev_addr; | |
786 | ||
787 | dev_addr = &route->addr.dev_addr; | |
788 | rdma_addr_get_dgid(dev_addr, (union ib_gid *) &resp->ib_route[0].dgid); | |
789 | rdma_addr_get_sgid(dev_addr, (union ib_gid *) &resp->ib_route[0].sgid); | |
790 | } | |
791 | ||
75216638 SH |
792 | static ssize_t ucma_query_route(struct ucma_file *file, |
793 | const char __user *inbuf, | |
794 | int in_len, int out_len) | |
795 | { | |
ee7aed45 | 796 | struct rdma_ucm_query cmd; |
75216638 SH |
797 | struct rdma_ucm_query_route_resp resp; |
798 | struct ucma_context *ctx; | |
799 | struct sockaddr *addr; | |
800 | int ret = 0; | |
801 | ||
802 | if (out_len < sizeof(resp)) | |
803 | return -ENOSPC; | |
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 | memset(&resp, 0, sizeof resp); | |
3f446754 | 813 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.src_addr; |
75216638 SH |
814 | memcpy(&resp.src_addr, addr, addr->sa_family == AF_INET ? |
815 | sizeof(struct sockaddr_in) : | |
816 | sizeof(struct sockaddr_in6)); | |
3f446754 | 817 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.dst_addr; |
75216638 SH |
818 | memcpy(&resp.dst_addr, addr, addr->sa_family == AF_INET ? |
819 | sizeof(struct sockaddr_in) : | |
820 | sizeof(struct sockaddr_in6)); | |
821 | if (!ctx->cm_id->device) | |
822 | goto out; | |
823 | ||
9cda779c | 824 | resp.node_guid = (__force __u64) ctx->cm_id->device->node_guid; |
75216638 | 825 | resp.port_num = ctx->cm_id->port_num; |
c72f2189 | 826 | |
fe53ba2f | 827 | if (rdma_cap_ib_sa(ctx->cm_id->device, ctx->cm_id->port_num)) |
c72f2189 | 828 | ucma_copy_ib_route(&resp, &ctx->cm_id->route); |
5d9fb044 | 829 | else if (rdma_protocol_roce(ctx->cm_id->device, ctx->cm_id->port_num)) |
c72f2189 MW |
830 | ucma_copy_iboe_route(&resp, &ctx->cm_id->route); |
831 | else if (rdma_protocol_iwarp(ctx->cm_id->device, ctx->cm_id->port_num)) | |
e86f8b06 | 832 | ucma_copy_iw_route(&resp, &ctx->cm_id->route); |
75216638 SH |
833 | |
834 | out: | |
835 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
836 | &resp, sizeof(resp))) | |
837 | ret = -EFAULT; | |
838 | ||
839 | ucma_put_ctx(ctx); | |
840 | return ret; | |
841 | } | |
842 | ||
ee7aed45 SH |
843 | static void ucma_query_device_addr(struct rdma_cm_id *cm_id, |
844 | struct rdma_ucm_query_addr_resp *resp) | |
845 | { | |
846 | if (!cm_id->device) | |
847 | return; | |
848 | ||
849 | resp->node_guid = (__force __u64) cm_id->device->node_guid; | |
850 | resp->port_num = cm_id->port_num; | |
851 | resp->pkey = (__force __u16) cpu_to_be16( | |
852 | ib_addr_get_pkey(&cm_id->route.addr.dev_addr)); | |
853 | } | |
854 | ||
855 | static ssize_t ucma_query_addr(struct ucma_context *ctx, | |
856 | void __user *response, int out_len) | |
857 | { | |
858 | struct rdma_ucm_query_addr_resp resp; | |
859 | struct sockaddr *addr; | |
860 | int ret = 0; | |
861 | ||
862 | if (out_len < sizeof(resp)) | |
863 | return -ENOSPC; | |
864 | ||
865 | memset(&resp, 0, sizeof resp); | |
866 | ||
867 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.src_addr; | |
868 | resp.src_size = rdma_addr_size(addr); | |
869 | memcpy(&resp.src_addr, addr, resp.src_size); | |
870 | ||
871 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.dst_addr; | |
872 | resp.dst_size = rdma_addr_size(addr); | |
873 | memcpy(&resp.dst_addr, addr, resp.dst_size); | |
874 | ||
875 | ucma_query_device_addr(ctx->cm_id, &resp); | |
876 | ||
877 | if (copy_to_user(response, &resp, sizeof(resp))) | |
878 | ret = -EFAULT; | |
879 | ||
880 | return ret; | |
881 | } | |
882 | ||
ac53b264 SH |
883 | static ssize_t ucma_query_path(struct ucma_context *ctx, |
884 | void __user *response, int out_len) | |
885 | { | |
886 | struct rdma_ucm_query_path_resp *resp; | |
887 | int i, ret = 0; | |
888 | ||
889 | if (out_len < sizeof(*resp)) | |
890 | return -ENOSPC; | |
891 | ||
892 | resp = kzalloc(out_len, GFP_KERNEL); | |
893 | if (!resp) | |
894 | return -ENOMEM; | |
895 | ||
896 | resp->num_paths = ctx->cm_id->route.num_paths; | |
897 | for (i = 0, out_len -= sizeof(*resp); | |
898 | i < resp->num_paths && out_len > sizeof(struct ib_path_rec_data); | |
899 | i++, out_len -= sizeof(struct ib_path_rec_data)) { | |
900 | ||
901 | resp->path_data[i].flags = IB_PATH_GMP | IB_PATH_PRIMARY | | |
902 | IB_PATH_BIDIRECTIONAL; | |
903 | ib_sa_pack_path(&ctx->cm_id->route.path_rec[i], | |
904 | &resp->path_data[i].path_rec); | |
905 | } | |
906 | ||
907 | if (copy_to_user(response, resp, | |
908 | sizeof(*resp) + (i * sizeof(struct ib_path_rec_data)))) | |
909 | ret = -EFAULT; | |
910 | ||
911 | kfree(resp); | |
912 | return ret; | |
913 | } | |
914 | ||
edaa7a55 SH |
915 | static ssize_t ucma_query_gid(struct ucma_context *ctx, |
916 | void __user *response, int out_len) | |
917 | { | |
918 | struct rdma_ucm_query_addr_resp resp; | |
919 | struct sockaddr_ib *addr; | |
920 | int ret = 0; | |
921 | ||
922 | if (out_len < sizeof(resp)) | |
923 | return -ENOSPC; | |
924 | ||
925 | memset(&resp, 0, sizeof resp); | |
926 | ||
927 | ucma_query_device_addr(ctx->cm_id, &resp); | |
928 | ||
929 | addr = (struct sockaddr_ib *) &resp.src_addr; | |
930 | resp.src_size = sizeof(*addr); | |
931 | if (ctx->cm_id->route.addr.src_addr.ss_family == AF_IB) { | |
932 | memcpy(addr, &ctx->cm_id->route.addr.src_addr, resp.src_size); | |
933 | } else { | |
934 | addr->sib_family = AF_IB; | |
935 | addr->sib_pkey = (__force __be16) resp.pkey; | |
936 | rdma_addr_get_sgid(&ctx->cm_id->route.addr.dev_addr, | |
937 | (union ib_gid *) &addr->sib_addr); | |
938 | addr->sib_sid = rdma_get_service_id(ctx->cm_id, (struct sockaddr *) | |
939 | &ctx->cm_id->route.addr.src_addr); | |
940 | } | |
941 | ||
942 | addr = (struct sockaddr_ib *) &resp.dst_addr; | |
943 | resp.dst_size = sizeof(*addr); | |
944 | if (ctx->cm_id->route.addr.dst_addr.ss_family == AF_IB) { | |
945 | memcpy(addr, &ctx->cm_id->route.addr.dst_addr, resp.dst_size); | |
946 | } else { | |
947 | addr->sib_family = AF_IB; | |
948 | addr->sib_pkey = (__force __be16) resp.pkey; | |
949 | rdma_addr_get_dgid(&ctx->cm_id->route.addr.dev_addr, | |
950 | (union ib_gid *) &addr->sib_addr); | |
951 | addr->sib_sid = rdma_get_service_id(ctx->cm_id, (struct sockaddr *) | |
952 | &ctx->cm_id->route.addr.dst_addr); | |
953 | } | |
954 | ||
955 | if (copy_to_user(response, &resp, sizeof(resp))) | |
956 | ret = -EFAULT; | |
957 | ||
958 | return ret; | |
959 | } | |
960 | ||
ee7aed45 SH |
961 | static ssize_t ucma_query(struct ucma_file *file, |
962 | const char __user *inbuf, | |
963 | int in_len, int out_len) | |
964 | { | |
965 | struct rdma_ucm_query cmd; | |
966 | struct ucma_context *ctx; | |
967 | void __user *response; | |
968 | int ret; | |
969 | ||
970 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
971 | return -EFAULT; | |
972 | ||
973 | response = (void __user *)(unsigned long) cmd.response; | |
974 | ctx = ucma_get_ctx(file, cmd.id); | |
975 | if (IS_ERR(ctx)) | |
976 | return PTR_ERR(ctx); | |
977 | ||
978 | switch (cmd.option) { | |
979 | case RDMA_USER_CM_QUERY_ADDR: | |
980 | ret = ucma_query_addr(ctx, response, out_len); | |
981 | break; | |
ac53b264 SH |
982 | case RDMA_USER_CM_QUERY_PATH: |
983 | ret = ucma_query_path(ctx, response, out_len); | |
984 | break; | |
edaa7a55 SH |
985 | case RDMA_USER_CM_QUERY_GID: |
986 | ret = ucma_query_gid(ctx, response, out_len); | |
987 | break; | |
ee7aed45 SH |
988 | default: |
989 | ret = -ENOSYS; | |
990 | break; | |
991 | } | |
992 | ||
993 | ucma_put_ctx(ctx); | |
994 | return ret; | |
995 | } | |
996 | ||
5c438135 SH |
997 | static void ucma_copy_conn_param(struct rdma_cm_id *id, |
998 | struct rdma_conn_param *dst, | |
75216638 SH |
999 | struct rdma_ucm_conn_param *src) |
1000 | { | |
1001 | dst->private_data = src->private_data; | |
1002 | dst->private_data_len = src->private_data_len; | |
1003 | dst->responder_resources =src->responder_resources; | |
1004 | dst->initiator_depth = src->initiator_depth; | |
1005 | dst->flow_control = src->flow_control; | |
1006 | dst->retry_count = src->retry_count; | |
1007 | dst->rnr_retry_count = src->rnr_retry_count; | |
1008 | dst->srq = src->srq; | |
1009 | dst->qp_num = src->qp_num; | |
5c438135 | 1010 | dst->qkey = (id->route.addr.src_addr.ss_family == AF_IB) ? src->qkey : 0; |
75216638 SH |
1011 | } |
1012 | ||
1013 | static ssize_t ucma_connect(struct ucma_file *file, const char __user *inbuf, | |
1014 | int in_len, int out_len) | |
1015 | { | |
1016 | struct rdma_ucm_connect cmd; | |
1017 | struct rdma_conn_param conn_param; | |
1018 | struct ucma_context *ctx; | |
1019 | int ret; | |
1020 | ||
1021 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1022 | return -EFAULT; | |
1023 | ||
1024 | if (!cmd.conn_param.valid) | |
1025 | return -EINVAL; | |
1026 | ||
1027 | ctx = ucma_get_ctx(file, cmd.id); | |
1028 | if (IS_ERR(ctx)) | |
1029 | return PTR_ERR(ctx); | |
1030 | ||
5c438135 | 1031 | ucma_copy_conn_param(ctx->cm_id, &conn_param, &cmd.conn_param); |
75216638 SH |
1032 | ret = rdma_connect(ctx->cm_id, &conn_param); |
1033 | ucma_put_ctx(ctx); | |
1034 | return ret; | |
1035 | } | |
1036 | ||
1037 | static ssize_t ucma_listen(struct ucma_file *file, const char __user *inbuf, | |
1038 | int in_len, int out_len) | |
1039 | { | |
1040 | struct rdma_ucm_listen cmd; | |
1041 | struct ucma_context *ctx; | |
1042 | int ret; | |
1043 | ||
1044 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1045 | return -EFAULT; | |
1046 | ||
1047 | ctx = ucma_get_ctx(file, cmd.id); | |
1048 | if (IS_ERR(ctx)) | |
1049 | return PTR_ERR(ctx); | |
1050 | ||
97cb7e40 SW |
1051 | ctx->backlog = cmd.backlog > 0 && cmd.backlog < max_backlog ? |
1052 | cmd.backlog : max_backlog; | |
75216638 SH |
1053 | ret = rdma_listen(ctx->cm_id, ctx->backlog); |
1054 | ucma_put_ctx(ctx); | |
1055 | return ret; | |
1056 | } | |
1057 | ||
1058 | static ssize_t ucma_accept(struct ucma_file *file, const char __user *inbuf, | |
1059 | int in_len, int out_len) | |
1060 | { | |
1061 | struct rdma_ucm_accept cmd; | |
1062 | struct rdma_conn_param conn_param; | |
1063 | struct ucma_context *ctx; | |
1064 | int ret; | |
1065 | ||
1066 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1067 | return -EFAULT; | |
1068 | ||
1069 | ctx = ucma_get_ctx(file, cmd.id); | |
1070 | if (IS_ERR(ctx)) | |
1071 | return PTR_ERR(ctx); | |
1072 | ||
1073 | if (cmd.conn_param.valid) { | |
5c438135 | 1074 | ucma_copy_conn_param(ctx->cm_id, &conn_param, &cmd.conn_param); |
9ced69ca | 1075 | mutex_lock(&file->mut); |
75216638 | 1076 | ret = rdma_accept(ctx->cm_id, &conn_param); |
9ced69ca SH |
1077 | if (!ret) |
1078 | ctx->uid = cmd.uid; | |
1079 | mutex_unlock(&file->mut); | |
75216638 SH |
1080 | } else |
1081 | ret = rdma_accept(ctx->cm_id, NULL); | |
1082 | ||
1083 | ucma_put_ctx(ctx); | |
1084 | return ret; | |
1085 | } | |
1086 | ||
1087 | static ssize_t ucma_reject(struct ucma_file *file, const char __user *inbuf, | |
1088 | int in_len, int out_len) | |
1089 | { | |
1090 | struct rdma_ucm_reject cmd; | |
1091 | struct ucma_context *ctx; | |
1092 | int ret; | |
1093 | ||
1094 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1095 | return -EFAULT; | |
1096 | ||
1097 | ctx = ucma_get_ctx(file, cmd.id); | |
1098 | if (IS_ERR(ctx)) | |
1099 | return PTR_ERR(ctx); | |
1100 | ||
1101 | ret = rdma_reject(ctx->cm_id, cmd.private_data, cmd.private_data_len); | |
1102 | ucma_put_ctx(ctx); | |
1103 | return ret; | |
1104 | } | |
1105 | ||
1106 | static ssize_t ucma_disconnect(struct ucma_file *file, const char __user *inbuf, | |
1107 | int in_len, int out_len) | |
1108 | { | |
1109 | struct rdma_ucm_disconnect cmd; | |
1110 | struct ucma_context *ctx; | |
1111 | int ret; | |
1112 | ||
1113 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1114 | return -EFAULT; | |
1115 | ||
1116 | ctx = ucma_get_ctx(file, cmd.id); | |
1117 | if (IS_ERR(ctx)) | |
1118 | return PTR_ERR(ctx); | |
1119 | ||
1120 | ret = rdma_disconnect(ctx->cm_id); | |
1121 | ucma_put_ctx(ctx); | |
1122 | return ret; | |
1123 | } | |
1124 | ||
1125 | static ssize_t ucma_init_qp_attr(struct ucma_file *file, | |
1126 | const char __user *inbuf, | |
1127 | int in_len, int out_len) | |
1128 | { | |
1129 | struct rdma_ucm_init_qp_attr cmd; | |
1130 | struct ib_uverbs_qp_attr resp; | |
1131 | struct ucma_context *ctx; | |
1132 | struct ib_qp_attr qp_attr; | |
1133 | int ret; | |
1134 | ||
1135 | if (out_len < sizeof(resp)) | |
1136 | return -ENOSPC; | |
1137 | ||
1138 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1139 | return -EFAULT; | |
1140 | ||
1141 | ctx = ucma_get_ctx(file, cmd.id); | |
1142 | if (IS_ERR(ctx)) | |
1143 | return PTR_ERR(ctx); | |
1144 | ||
1145 | resp.qp_attr_mask = 0; | |
1146 | memset(&qp_attr, 0, sizeof qp_attr); | |
1147 | qp_attr.qp_state = cmd.qp_state; | |
1148 | ret = rdma_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask); | |
1149 | if (ret) | |
1150 | goto out; | |
1151 | ||
1152 | ib_copy_qp_attr_to_user(&resp, &qp_attr); | |
1153 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
1154 | &resp, sizeof(resp))) | |
1155 | ret = -EFAULT; | |
1156 | ||
1157 | out: | |
1158 | ucma_put_ctx(ctx); | |
1159 | return ret; | |
1160 | } | |
1161 | ||
7ce86409 SH |
1162 | static int ucma_set_option_id(struct ucma_context *ctx, int optname, |
1163 | void *optval, size_t optlen) | |
1164 | { | |
1165 | int ret = 0; | |
1166 | ||
1167 | switch (optname) { | |
1168 | case RDMA_OPTION_ID_TOS: | |
1169 | if (optlen != sizeof(u8)) { | |
1170 | ret = -EINVAL; | |
1171 | break; | |
1172 | } | |
1173 | rdma_set_service_type(ctx->cm_id, *((u8 *) optval)); | |
1174 | break; | |
a9bb7912 HS |
1175 | case RDMA_OPTION_ID_REUSEADDR: |
1176 | if (optlen != sizeof(int)) { | |
1177 | ret = -EINVAL; | |
1178 | break; | |
1179 | } | |
1180 | ret = rdma_set_reuseaddr(ctx->cm_id, *((int *) optval) ? 1 : 0); | |
1181 | break; | |
68602120 SH |
1182 | case RDMA_OPTION_ID_AFONLY: |
1183 | if (optlen != sizeof(int)) { | |
1184 | ret = -EINVAL; | |
1185 | break; | |
1186 | } | |
1187 | ret = rdma_set_afonly(ctx->cm_id, *((int *) optval) ? 1 : 0); | |
1188 | break; | |
7ce86409 SH |
1189 | default: |
1190 | ret = -ENOSYS; | |
1191 | } | |
1192 | ||
1193 | return ret; | |
1194 | } | |
1195 | ||
a7ca1f00 SH |
1196 | static int ucma_set_ib_path(struct ucma_context *ctx, |
1197 | struct ib_path_rec_data *path_data, size_t optlen) | |
1198 | { | |
1199 | struct ib_sa_path_rec sa_path; | |
1200 | struct rdma_cm_event event; | |
1201 | int ret; | |
1202 | ||
1203 | if (optlen % sizeof(*path_data)) | |
1204 | return -EINVAL; | |
1205 | ||
1206 | for (; optlen; optlen -= sizeof(*path_data), path_data++) { | |
1207 | if (path_data->flags == (IB_PATH_GMP | IB_PATH_PRIMARY | | |
1208 | IB_PATH_BIDIRECTIONAL)) | |
1209 | break; | |
1210 | } | |
1211 | ||
1212 | if (!optlen) | |
1213 | return -EINVAL; | |
1214 | ||
c2be9dc0 | 1215 | memset(&sa_path, 0, sizeof(sa_path)); |
c2be9dc0 | 1216 | |
a7ca1f00 SH |
1217 | ib_sa_unpack_path(path_data->path_rec, &sa_path); |
1218 | ret = rdma_set_ib_paths(ctx->cm_id, &sa_path, 1); | |
1219 | if (ret) | |
1220 | return ret; | |
1221 | ||
1222 | memset(&event, 0, sizeof event); | |
1223 | event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; | |
1224 | return ucma_event_handler(ctx->cm_id, &event); | |
1225 | } | |
1226 | ||
1227 | static int ucma_set_option_ib(struct ucma_context *ctx, int optname, | |
1228 | void *optval, size_t optlen) | |
1229 | { | |
1230 | int ret; | |
1231 | ||
1232 | switch (optname) { | |
1233 | case RDMA_OPTION_IB_PATH: | |
1234 | ret = ucma_set_ib_path(ctx, optval, optlen); | |
1235 | break; | |
1236 | default: | |
1237 | ret = -ENOSYS; | |
1238 | } | |
1239 | ||
1240 | return ret; | |
1241 | } | |
1242 | ||
7ce86409 SH |
1243 | static int ucma_set_option_level(struct ucma_context *ctx, int level, |
1244 | int optname, void *optval, size_t optlen) | |
1245 | { | |
1246 | int ret; | |
1247 | ||
1248 | switch (level) { | |
1249 | case RDMA_OPTION_ID: | |
1250 | ret = ucma_set_option_id(ctx, optname, optval, optlen); | |
1251 | break; | |
a7ca1f00 SH |
1252 | case RDMA_OPTION_IB: |
1253 | ret = ucma_set_option_ib(ctx, optname, optval, optlen); | |
1254 | break; | |
7ce86409 SH |
1255 | default: |
1256 | ret = -ENOSYS; | |
1257 | } | |
1258 | ||
1259 | return ret; | |
1260 | } | |
1261 | ||
1262 | static ssize_t ucma_set_option(struct ucma_file *file, const char __user *inbuf, | |
1263 | int in_len, int out_len) | |
1264 | { | |
1265 | struct rdma_ucm_set_option cmd; | |
1266 | struct ucma_context *ctx; | |
1267 | void *optval; | |
1268 | int ret; | |
1269 | ||
1270 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1271 | return -EFAULT; | |
1272 | ||
1273 | ctx = ucma_get_ctx(file, cmd.id); | |
1274 | if (IS_ERR(ctx)) | |
1275 | return PTR_ERR(ctx); | |
1276 | ||
0764c76e RD |
1277 | optval = memdup_user((void __user *) (unsigned long) cmd.optval, |
1278 | cmd.optlen); | |
1279 | if (IS_ERR(optval)) { | |
1280 | ret = PTR_ERR(optval); | |
1281 | goto out; | |
7ce86409 SH |
1282 | } |
1283 | ||
1284 | ret = ucma_set_option_level(ctx, cmd.level, cmd.optname, optval, | |
1285 | cmd.optlen); | |
7ce86409 | 1286 | kfree(optval); |
0764c76e RD |
1287 | |
1288 | out: | |
7ce86409 SH |
1289 | ucma_put_ctx(ctx); |
1290 | return ret; | |
1291 | } | |
1292 | ||
75216638 SH |
1293 | static ssize_t ucma_notify(struct ucma_file *file, const char __user *inbuf, |
1294 | int in_len, int out_len) | |
1295 | { | |
1296 | struct rdma_ucm_notify cmd; | |
1297 | struct ucma_context *ctx; | |
1298 | int ret; | |
1299 | ||
1300 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1301 | return -EFAULT; | |
1302 | ||
1303 | ctx = ucma_get_ctx(file, cmd.id); | |
1304 | if (IS_ERR(ctx)) | |
1305 | return PTR_ERR(ctx); | |
1306 | ||
1307 | ret = rdma_notify(ctx->cm_id, (enum ib_event_type) cmd.event); | |
1308 | ucma_put_ctx(ctx); | |
1309 | return ret; | |
1310 | } | |
1311 | ||
5bc2b7b3 SH |
1312 | static ssize_t ucma_process_join(struct ucma_file *file, |
1313 | struct rdma_ucm_join_mcast *cmd, int out_len) | |
c8f6a362 | 1314 | { |
c8f6a362 SH |
1315 | struct rdma_ucm_create_id_resp resp; |
1316 | struct ucma_context *ctx; | |
1317 | struct ucma_multicast *mc; | |
5bc2b7b3 | 1318 | struct sockaddr *addr; |
c8f6a362 SH |
1319 | int ret; |
1320 | ||
1321 | if (out_len < sizeof(resp)) | |
1322 | return -ENOSPC; | |
1323 | ||
5bc2b7b3 SH |
1324 | addr = (struct sockaddr *) &cmd->addr; |
1325 | if (cmd->reserved || !cmd->addr_size || (cmd->addr_size != rdma_addr_size(addr))) | |
1326 | return -EINVAL; | |
c8f6a362 | 1327 | |
5bc2b7b3 | 1328 | ctx = ucma_get_ctx(file, cmd->id); |
c8f6a362 SH |
1329 | if (IS_ERR(ctx)) |
1330 | return PTR_ERR(ctx); | |
1331 | ||
1332 | mutex_lock(&file->mut); | |
1333 | mc = ucma_alloc_multicast(ctx); | |
6aea938f JB |
1334 | if (!mc) { |
1335 | ret = -ENOMEM; | |
c8f6a362 SH |
1336 | goto err1; |
1337 | } | |
1338 | ||
5bc2b7b3 SH |
1339 | mc->uid = cmd->uid; |
1340 | memcpy(&mc->addr, addr, cmd->addr_size); | |
3f446754 | 1341 | ret = rdma_join_multicast(ctx->cm_id, (struct sockaddr *) &mc->addr, mc); |
c8f6a362 SH |
1342 | if (ret) |
1343 | goto err2; | |
1344 | ||
1345 | resp.id = mc->id; | |
5bc2b7b3 | 1346 | if (copy_to_user((void __user *)(unsigned long) cmd->response, |
c8f6a362 SH |
1347 | &resp, sizeof(resp))) { |
1348 | ret = -EFAULT; | |
1349 | goto err3; | |
1350 | } | |
1351 | ||
1352 | mutex_unlock(&file->mut); | |
1353 | ucma_put_ctx(ctx); | |
1354 | return 0; | |
1355 | ||
1356 | err3: | |
3f446754 | 1357 | rdma_leave_multicast(ctx->cm_id, (struct sockaddr *) &mc->addr); |
c8f6a362 SH |
1358 | ucma_cleanup_mc_events(mc); |
1359 | err2: | |
1360 | mutex_lock(&mut); | |
1361 | idr_remove(&multicast_idr, mc->id); | |
1362 | mutex_unlock(&mut); | |
1363 | list_del(&mc->list); | |
1364 | kfree(mc); | |
1365 | err1: | |
1366 | mutex_unlock(&file->mut); | |
1367 | ucma_put_ctx(ctx); | |
1368 | return ret; | |
1369 | } | |
1370 | ||
5bc2b7b3 SH |
1371 | static ssize_t ucma_join_ip_multicast(struct ucma_file *file, |
1372 | const char __user *inbuf, | |
1373 | int in_len, int out_len) | |
1374 | { | |
1375 | struct rdma_ucm_join_ip_mcast cmd; | |
1376 | struct rdma_ucm_join_mcast join_cmd; | |
1377 | ||
1378 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1379 | return -EFAULT; | |
1380 | ||
1381 | join_cmd.response = cmd.response; | |
1382 | join_cmd.uid = cmd.uid; | |
1383 | join_cmd.id = cmd.id; | |
1384 | join_cmd.addr_size = rdma_addr_size((struct sockaddr *) &cmd.addr); | |
1385 | join_cmd.reserved = 0; | |
1386 | memcpy(&join_cmd.addr, &cmd.addr, join_cmd.addr_size); | |
1387 | ||
1388 | return ucma_process_join(file, &join_cmd, out_len); | |
1389 | } | |
1390 | ||
1391 | static ssize_t ucma_join_multicast(struct ucma_file *file, | |
1392 | const char __user *inbuf, | |
1393 | int in_len, int out_len) | |
1394 | { | |
1395 | struct rdma_ucm_join_mcast cmd; | |
1396 | ||
1397 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1398 | return -EFAULT; | |
1399 | ||
1400 | return ucma_process_join(file, &cmd, out_len); | |
1401 | } | |
1402 | ||
c8f6a362 SH |
1403 | static ssize_t ucma_leave_multicast(struct ucma_file *file, |
1404 | const char __user *inbuf, | |
1405 | int in_len, int out_len) | |
1406 | { | |
1407 | struct rdma_ucm_destroy_id cmd; | |
1408 | struct rdma_ucm_destroy_id_resp resp; | |
1409 | struct ucma_multicast *mc; | |
1410 | int ret = 0; | |
1411 | ||
1412 | if (out_len < sizeof(resp)) | |
1413 | return -ENOSPC; | |
1414 | ||
1415 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1416 | return -EFAULT; | |
1417 | ||
1418 | mutex_lock(&mut); | |
1419 | mc = idr_find(&multicast_idr, cmd.id); | |
1420 | if (!mc) | |
1421 | mc = ERR_PTR(-ENOENT); | |
1422 | else if (mc->ctx->file != file) | |
1423 | mc = ERR_PTR(-EINVAL); | |
7e967fd0 JG |
1424 | else if (!atomic_inc_not_zero(&mc->ctx->ref)) |
1425 | mc = ERR_PTR(-ENXIO); | |
1426 | else | |
c8f6a362 | 1427 | idr_remove(&multicast_idr, mc->id); |
c8f6a362 SH |
1428 | mutex_unlock(&mut); |
1429 | ||
1430 | if (IS_ERR(mc)) { | |
1431 | ret = PTR_ERR(mc); | |
1432 | goto out; | |
1433 | } | |
1434 | ||
3f446754 | 1435 | rdma_leave_multicast(mc->ctx->cm_id, (struct sockaddr *) &mc->addr); |
c8f6a362 SH |
1436 | mutex_lock(&mc->ctx->file->mut); |
1437 | ucma_cleanup_mc_events(mc); | |
1438 | list_del(&mc->list); | |
1439 | mutex_unlock(&mc->ctx->file->mut); | |
1440 | ||
1441 | ucma_put_ctx(mc->ctx); | |
1442 | resp.events_reported = mc->events_reported; | |
1443 | kfree(mc); | |
1444 | ||
1445 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
1446 | &resp, sizeof(resp))) | |
1447 | ret = -EFAULT; | |
1448 | out: | |
1449 | return ret; | |
1450 | } | |
1451 | ||
88314e4d SH |
1452 | static void ucma_lock_files(struct ucma_file *file1, struct ucma_file *file2) |
1453 | { | |
1454 | /* Acquire mutex's based on pointer comparison to prevent deadlock. */ | |
1455 | if (file1 < file2) { | |
1456 | mutex_lock(&file1->mut); | |
31b57b87 | 1457 | mutex_lock_nested(&file2->mut, SINGLE_DEPTH_NESTING); |
88314e4d SH |
1458 | } else { |
1459 | mutex_lock(&file2->mut); | |
31b57b87 | 1460 | mutex_lock_nested(&file1->mut, SINGLE_DEPTH_NESTING); |
88314e4d SH |
1461 | } |
1462 | } | |
1463 | ||
1464 | static void ucma_unlock_files(struct ucma_file *file1, struct ucma_file *file2) | |
1465 | { | |
1466 | if (file1 < file2) { | |
1467 | mutex_unlock(&file2->mut); | |
1468 | mutex_unlock(&file1->mut); | |
1469 | } else { | |
1470 | mutex_unlock(&file1->mut); | |
1471 | mutex_unlock(&file2->mut); | |
1472 | } | |
1473 | } | |
1474 | ||
1475 | static void ucma_move_events(struct ucma_context *ctx, struct ucma_file *file) | |
1476 | { | |
1477 | struct ucma_event *uevent, *tmp; | |
1478 | ||
1479 | list_for_each_entry_safe(uevent, tmp, &ctx->file->event_list, list) | |
1480 | if (uevent->ctx == ctx) | |
1481 | list_move_tail(&uevent->list, &file->event_list); | |
1482 | } | |
1483 | ||
1484 | static ssize_t ucma_migrate_id(struct ucma_file *new_file, | |
1485 | const char __user *inbuf, | |
1486 | int in_len, int out_len) | |
1487 | { | |
1488 | struct rdma_ucm_migrate_id cmd; | |
1489 | struct rdma_ucm_migrate_resp resp; | |
1490 | struct ucma_context *ctx; | |
2903ff01 | 1491 | struct fd f; |
88314e4d SH |
1492 | struct ucma_file *cur_file; |
1493 | int ret = 0; | |
1494 | ||
1495 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1496 | return -EFAULT; | |
1497 | ||
1498 | /* Get current fd to protect against it being closed */ | |
2903ff01 AV |
1499 | f = fdget(cmd.fd); |
1500 | if (!f.file) | |
88314e4d SH |
1501 | return -ENOENT; |
1502 | ||
1503 | /* Validate current fd and prevent destruction of id. */ | |
2903ff01 | 1504 | ctx = ucma_get_ctx(f.file->private_data, cmd.id); |
88314e4d SH |
1505 | if (IS_ERR(ctx)) { |
1506 | ret = PTR_ERR(ctx); | |
1507 | goto file_put; | |
1508 | } | |
1509 | ||
1510 | cur_file = ctx->file; | |
1511 | if (cur_file == new_file) { | |
1512 | resp.events_reported = ctx->events_reported; | |
1513 | goto response; | |
1514 | } | |
1515 | ||
1516 | /* | |
1517 | * Migrate events between fd's, maintaining order, and avoiding new | |
1518 | * events being added before existing events. | |
1519 | */ | |
1520 | ucma_lock_files(cur_file, new_file); | |
1521 | mutex_lock(&mut); | |
1522 | ||
1523 | list_move_tail(&ctx->list, &new_file->ctx_list); | |
1524 | ucma_move_events(ctx, new_file); | |
1525 | ctx->file = new_file; | |
1526 | resp.events_reported = ctx->events_reported; | |
1527 | ||
1528 | mutex_unlock(&mut); | |
1529 | ucma_unlock_files(cur_file, new_file); | |
1530 | ||
1531 | response: | |
1532 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
1533 | &resp, sizeof(resp))) | |
1534 | ret = -EFAULT; | |
1535 | ||
1536 | ucma_put_ctx(ctx); | |
1537 | file_put: | |
2903ff01 | 1538 | fdput(f); |
88314e4d SH |
1539 | return ret; |
1540 | } | |
1541 | ||
75216638 SH |
1542 | static ssize_t (*ucma_cmd_table[])(struct ucma_file *file, |
1543 | const char __user *inbuf, | |
1544 | int in_len, int out_len) = { | |
05ad9457 SH |
1545 | [RDMA_USER_CM_CMD_CREATE_ID] = ucma_create_id, |
1546 | [RDMA_USER_CM_CMD_DESTROY_ID] = ucma_destroy_id, | |
1547 | [RDMA_USER_CM_CMD_BIND_IP] = ucma_bind_ip, | |
1548 | [RDMA_USER_CM_CMD_RESOLVE_IP] = ucma_resolve_ip, | |
1549 | [RDMA_USER_CM_CMD_RESOLVE_ROUTE] = ucma_resolve_route, | |
1550 | [RDMA_USER_CM_CMD_QUERY_ROUTE] = ucma_query_route, | |
1551 | [RDMA_USER_CM_CMD_CONNECT] = ucma_connect, | |
1552 | [RDMA_USER_CM_CMD_LISTEN] = ucma_listen, | |
1553 | [RDMA_USER_CM_CMD_ACCEPT] = ucma_accept, | |
1554 | [RDMA_USER_CM_CMD_REJECT] = ucma_reject, | |
1555 | [RDMA_USER_CM_CMD_DISCONNECT] = ucma_disconnect, | |
1556 | [RDMA_USER_CM_CMD_INIT_QP_ATTR] = ucma_init_qp_attr, | |
1557 | [RDMA_USER_CM_CMD_GET_EVENT] = ucma_get_event, | |
1558 | [RDMA_USER_CM_CMD_GET_OPTION] = NULL, | |
1559 | [RDMA_USER_CM_CMD_SET_OPTION] = ucma_set_option, | |
1560 | [RDMA_USER_CM_CMD_NOTIFY] = ucma_notify, | |
1561 | [RDMA_USER_CM_CMD_JOIN_IP_MCAST] = ucma_join_ip_multicast, | |
1562 | [RDMA_USER_CM_CMD_LEAVE_MCAST] = ucma_leave_multicast, | |
1563 | [RDMA_USER_CM_CMD_MIGRATE_ID] = ucma_migrate_id, | |
eebe4c3a | 1564 | [RDMA_USER_CM_CMD_QUERY] = ucma_query, |
209cf2a7 | 1565 | [RDMA_USER_CM_CMD_BIND] = ucma_bind, |
5bc2b7b3 SH |
1566 | [RDMA_USER_CM_CMD_RESOLVE_ADDR] = ucma_resolve_addr, |
1567 | [RDMA_USER_CM_CMD_JOIN_MCAST] = ucma_join_multicast | |
75216638 SH |
1568 | }; |
1569 | ||
1570 | static ssize_t ucma_write(struct file *filp, const char __user *buf, | |
1571 | size_t len, loff_t *pos) | |
1572 | { | |
1573 | struct ucma_file *file = filp->private_data; | |
1574 | struct rdma_ucm_cmd_hdr hdr; | |
1575 | ssize_t ret; | |
1576 | ||
1577 | if (len < sizeof(hdr)) | |
1578 | return -EINVAL; | |
1579 | ||
1580 | if (copy_from_user(&hdr, buf, sizeof(hdr))) | |
1581 | return -EFAULT; | |
1582 | ||
caf6e3f2 | 1583 | if (hdr.cmd >= ARRAY_SIZE(ucma_cmd_table)) |
75216638 SH |
1584 | return -EINVAL; |
1585 | ||
1586 | if (hdr.in + sizeof(hdr) > len) | |
1587 | return -EINVAL; | |
1588 | ||
1589 | if (!ucma_cmd_table[hdr.cmd]) | |
1590 | return -ENOSYS; | |
1591 | ||
1592 | ret = ucma_cmd_table[hdr.cmd](file, buf + sizeof(hdr), hdr.in, hdr.out); | |
1593 | if (!ret) | |
1594 | ret = len; | |
1595 | ||
1596 | return ret; | |
1597 | } | |
1598 | ||
1599 | static unsigned int ucma_poll(struct file *filp, struct poll_table_struct *wait) | |
1600 | { | |
1601 | struct ucma_file *file = filp->private_data; | |
1602 | unsigned int mask = 0; | |
1603 | ||
1604 | poll_wait(filp, &file->poll_wait, wait); | |
1605 | ||
1606 | if (!list_empty(&file->event_list)) | |
1607 | mask = POLLIN | POLLRDNORM; | |
1608 | ||
1609 | return mask; | |
1610 | } | |
1611 | ||
f7a6117e RD |
1612 | /* |
1613 | * ucma_open() does not need the BKL: | |
1614 | * | |
1615 | * - no global state is referred to; | |
1616 | * - there is no ioctl method to race against; | |
1617 | * - no further module initialization is required for open to work | |
1618 | * after the device is registered. | |
1619 | */ | |
75216638 SH |
1620 | static int ucma_open(struct inode *inode, struct file *filp) |
1621 | { | |
1622 | struct ucma_file *file; | |
1623 | ||
1624 | file = kmalloc(sizeof *file, GFP_KERNEL); | |
1625 | if (!file) | |
1626 | return -ENOMEM; | |
1627 | ||
0174b381 SL |
1628 | file->close_wq = create_singlethread_workqueue("ucma_close_id"); |
1629 | if (!file->close_wq) { | |
1630 | kfree(file); | |
1631 | return -ENOMEM; | |
1632 | } | |
1633 | ||
75216638 SH |
1634 | INIT_LIST_HEAD(&file->event_list); |
1635 | INIT_LIST_HEAD(&file->ctx_list); | |
1636 | init_waitqueue_head(&file->poll_wait); | |
1637 | mutex_init(&file->mut); | |
1638 | ||
1639 | filp->private_data = file; | |
1640 | file->filp = filp; | |
bc1db9af RD |
1641 | |
1642 | return nonseekable_open(inode, filp); | |
75216638 SH |
1643 | } |
1644 | ||
1645 | static int ucma_close(struct inode *inode, struct file *filp) | |
1646 | { | |
1647 | struct ucma_file *file = filp->private_data; | |
1648 | struct ucma_context *ctx, *tmp; | |
1649 | ||
1650 | mutex_lock(&file->mut); | |
1651 | list_for_each_entry_safe(ctx, tmp, &file->ctx_list, list) { | |
e1c30298 | 1652 | ctx->destroying = 1; |
75216638 SH |
1653 | mutex_unlock(&file->mut); |
1654 | ||
1655 | mutex_lock(&mut); | |
1656 | idr_remove(&ctx_idr, ctx->id); | |
1657 | mutex_unlock(&mut); | |
1658 | ||
e1c30298 YH |
1659 | flush_workqueue(file->close_wq); |
1660 | /* At that step once ctx was marked as destroying and workqueue | |
1661 | * was flushed we are safe from any inflights handlers that | |
1662 | * might put other closing task. | |
1663 | */ | |
1664 | mutex_lock(&mut); | |
1665 | if (!ctx->closing) { | |
1666 | mutex_unlock(&mut); | |
1667 | /* rdma_destroy_id ensures that no event handlers are | |
1668 | * inflight for that id before releasing it. | |
1669 | */ | |
1670 | rdma_destroy_id(ctx->cm_id); | |
1671 | } else { | |
1672 | mutex_unlock(&mut); | |
1673 | } | |
1674 | ||
75216638 SH |
1675 | ucma_free_ctx(ctx); |
1676 | mutex_lock(&file->mut); | |
1677 | } | |
1678 | mutex_unlock(&file->mut); | |
e1c30298 | 1679 | destroy_workqueue(file->close_wq); |
75216638 SH |
1680 | kfree(file); |
1681 | return 0; | |
1682 | } | |
1683 | ||
2b8693c0 | 1684 | static const struct file_operations ucma_fops = { |
75216638 SH |
1685 | .owner = THIS_MODULE, |
1686 | .open = ucma_open, | |
1687 | .release = ucma_close, | |
1688 | .write = ucma_write, | |
1689 | .poll = ucma_poll, | |
bc1db9af | 1690 | .llseek = no_llseek, |
75216638 SH |
1691 | }; |
1692 | ||
1693 | static struct miscdevice ucma_misc = { | |
04ea2f81 RD |
1694 | .minor = MISC_DYNAMIC_MINOR, |
1695 | .name = "rdma_cm", | |
1696 | .nodename = "infiniband/rdma_cm", | |
1697 | .mode = 0666, | |
1698 | .fops = &ucma_fops, | |
75216638 SH |
1699 | }; |
1700 | ||
1701 | static ssize_t show_abi_version(struct device *dev, | |
1702 | struct device_attribute *attr, | |
1703 | char *buf) | |
1704 | { | |
1705 | return sprintf(buf, "%d\n", RDMA_USER_CM_ABI_VERSION); | |
1706 | } | |
1707 | static DEVICE_ATTR(abi_version, S_IRUGO, show_abi_version, NULL); | |
1708 | ||
1709 | static int __init ucma_init(void) | |
1710 | { | |
1711 | int ret; | |
1712 | ||
1713 | ret = misc_register(&ucma_misc); | |
1714 | if (ret) | |
1715 | return ret; | |
1716 | ||
1717 | ret = device_create_file(ucma_misc.this_device, &dev_attr_abi_version); | |
1718 | if (ret) { | |
1719 | printk(KERN_ERR "rdma_ucm: couldn't create abi_version attr\n"); | |
97cb7e40 SW |
1720 | goto err1; |
1721 | } | |
1722 | ||
ec8f23ce | 1723 | ucma_ctl_table_hdr = register_net_sysctl(&init_net, "net/rdma_ucm", ucma_ctl_table); |
97cb7e40 SW |
1724 | if (!ucma_ctl_table_hdr) { |
1725 | printk(KERN_ERR "rdma_ucm: couldn't register sysctl paths\n"); | |
1726 | ret = -ENOMEM; | |
1727 | goto err2; | |
75216638 SH |
1728 | } |
1729 | return 0; | |
97cb7e40 SW |
1730 | err2: |
1731 | device_remove_file(ucma_misc.this_device, &dev_attr_abi_version); | |
1732 | err1: | |
75216638 SH |
1733 | misc_deregister(&ucma_misc); |
1734 | return ret; | |
1735 | } | |
1736 | ||
1737 | static void __exit ucma_cleanup(void) | |
1738 | { | |
5dd3df10 | 1739 | unregister_net_sysctl_table(ucma_ctl_table_hdr); |
75216638 SH |
1740 | device_remove_file(ucma_misc.this_device, &dev_attr_abi_version); |
1741 | misc_deregister(&ucma_misc); | |
1742 | idr_destroy(&ctx_idr); | |
45d25420 | 1743 | idr_destroy(&multicast_idr); |
75216638 SH |
1744 | } |
1745 | ||
1746 | module_init(ucma_init); | |
1747 | module_exit(ucma_cleanup); |