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> |
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> |
ee7aed45 | 50 | #include <rdma/ib_addr.h> |
edaa7a55 | 51 | #include <rdma/ib.h> |
75216638 SH |
52 | |
53 | MODULE_AUTHOR("Sean Hefty"); | |
54 | MODULE_DESCRIPTION("RDMA Userspace Connection Manager Access"); | |
55 | MODULE_LICENSE("Dual BSD/GPL"); | |
56 | ||
97cb7e40 SW |
57 | static unsigned int max_backlog = 1024; |
58 | ||
59 | static struct ctl_table_header *ucma_ctl_table_hdr; | |
f3a5e3e3 | 60 | static struct ctl_table ucma_ctl_table[] = { |
97cb7e40 SW |
61 | { |
62 | .procname = "max_backlog", | |
63 | .data = &max_backlog, | |
64 | .maxlen = sizeof max_backlog, | |
65 | .mode = 0644, | |
66 | .proc_handler = proc_dointvec, | |
67 | }, | |
68 | { } | |
69 | }; | |
70 | ||
75216638 SH |
71 | struct ucma_file { |
72 | struct mutex mut; | |
73 | struct file *filp; | |
74 | struct list_head ctx_list; | |
75 | struct list_head event_list; | |
76 | wait_queue_head_t poll_wait; | |
e1c30298 | 77 | struct workqueue_struct *close_wq; |
75216638 SH |
78 | }; |
79 | ||
80 | struct ucma_context { | |
81 | int id; | |
82 | struct completion comp; | |
83 | atomic_t ref; | |
84 | int events_reported; | |
85 | int backlog; | |
86 | ||
87 | struct ucma_file *file; | |
88 | struct rdma_cm_id *cm_id; | |
89 | u64 uid; | |
90 | ||
91 | struct list_head list; | |
c8f6a362 | 92 | struct list_head mc_list; |
e1c30298 YH |
93 | /* mark that device is in process of destroying the internal HW |
94 | * resources, protected by the global mut | |
95 | */ | |
96 | int closing; | |
97 | /* sync between removal event and id destroy, protected by file mut */ | |
98 | int destroying; | |
99 | struct work_struct close_work; | |
c8f6a362 SH |
100 | }; |
101 | ||
102 | struct ucma_multicast { | |
103 | struct ucma_context *ctx; | |
104 | int id; | |
105 | int events_reported; | |
106 | ||
107 | u64 uid; | |
108 | struct list_head list; | |
3f446754 | 109 | struct sockaddr_storage addr; |
75216638 SH |
110 | }; |
111 | ||
112 | struct ucma_event { | |
113 | struct ucma_context *ctx; | |
c8f6a362 | 114 | struct ucma_multicast *mc; |
75216638 SH |
115 | struct list_head list; |
116 | struct rdma_cm_id *cm_id; | |
117 | struct rdma_ucm_event_resp resp; | |
e1c30298 | 118 | struct work_struct close_work; |
75216638 SH |
119 | }; |
120 | ||
121 | static DEFINE_MUTEX(mut); | |
122 | static DEFINE_IDR(ctx_idr); | |
c8f6a362 | 123 | static DEFINE_IDR(multicast_idr); |
75216638 SH |
124 | |
125 | static inline struct ucma_context *_ucma_find_context(int id, | |
126 | struct ucma_file *file) | |
127 | { | |
128 | struct ucma_context *ctx; | |
129 | ||
130 | ctx = idr_find(&ctx_idr, id); | |
131 | if (!ctx) | |
132 | ctx = ERR_PTR(-ENOENT); | |
133 | else if (ctx->file != file) | |
134 | ctx = ERR_PTR(-EINVAL); | |
135 | return ctx; | |
136 | } | |
137 | ||
138 | static struct ucma_context *ucma_get_ctx(struct ucma_file *file, int id) | |
139 | { | |
140 | struct ucma_context *ctx; | |
141 | ||
142 | mutex_lock(&mut); | |
143 | ctx = _ucma_find_context(id, file); | |
e1c30298 YH |
144 | if (!IS_ERR(ctx)) { |
145 | if (ctx->closing) | |
146 | ctx = ERR_PTR(-EIO); | |
147 | else | |
148 | atomic_inc(&ctx->ref); | |
149 | } | |
75216638 SH |
150 | mutex_unlock(&mut); |
151 | return ctx; | |
152 | } | |
153 | ||
154 | static void ucma_put_ctx(struct ucma_context *ctx) | |
155 | { | |
156 | if (atomic_dec_and_test(&ctx->ref)) | |
157 | complete(&ctx->comp); | |
158 | } | |
159 | ||
e1c30298 YH |
160 | static void ucma_close_event_id(struct work_struct *work) |
161 | { | |
162 | struct ucma_event *uevent_close = container_of(work, struct ucma_event, close_work); | |
163 | ||
164 | rdma_destroy_id(uevent_close->cm_id); | |
165 | kfree(uevent_close); | |
166 | } | |
167 | ||
168 | static void ucma_close_id(struct work_struct *work) | |
169 | { | |
170 | struct ucma_context *ctx = container_of(work, struct ucma_context, close_work); | |
171 | ||
172 | /* once all inflight tasks are finished, we close all underlying | |
173 | * resources. The context is still alive till its explicit destryoing | |
174 | * by its creator. | |
175 | */ | |
176 | ucma_put_ctx(ctx); | |
177 | wait_for_completion(&ctx->comp); | |
178 | /* No new events will be generated after destroying the id. */ | |
179 | rdma_destroy_id(ctx->cm_id); | |
180 | } | |
181 | ||
75216638 SH |
182 | static struct ucma_context *ucma_alloc_ctx(struct ucma_file *file) |
183 | { | |
184 | struct ucma_context *ctx; | |
75216638 SH |
185 | |
186 | ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); | |
187 | if (!ctx) | |
188 | return NULL; | |
189 | ||
e1c30298 | 190 | INIT_WORK(&ctx->close_work, ucma_close_id); |
75216638 SH |
191 | atomic_set(&ctx->ref, 1); |
192 | init_completion(&ctx->comp); | |
c8f6a362 | 193 | INIT_LIST_HEAD(&ctx->mc_list); |
75216638 SH |
194 | ctx->file = file; |
195 | ||
3b069c5d TH |
196 | mutex_lock(&mut); |
197 | ctx->id = idr_alloc(&ctx_idr, ctx, 0, 0, GFP_KERNEL); | |
198 | mutex_unlock(&mut); | |
199 | if (ctx->id < 0) | |
75216638 SH |
200 | goto error; |
201 | ||
202 | list_add_tail(&ctx->list, &file->ctx_list); | |
203 | return ctx; | |
204 | ||
205 | error: | |
206 | kfree(ctx); | |
207 | return NULL; | |
208 | } | |
209 | ||
c8f6a362 SH |
210 | static struct ucma_multicast* ucma_alloc_multicast(struct ucma_context *ctx) |
211 | { | |
212 | struct ucma_multicast *mc; | |
c8f6a362 SH |
213 | |
214 | mc = kzalloc(sizeof(*mc), GFP_KERNEL); | |
215 | if (!mc) | |
216 | return NULL; | |
217 | ||
3b069c5d TH |
218 | mutex_lock(&mut); |
219 | mc->id = idr_alloc(&multicast_idr, mc, 0, 0, GFP_KERNEL); | |
220 | mutex_unlock(&mut); | |
221 | if (mc->id < 0) | |
c8f6a362 SH |
222 | goto error; |
223 | ||
224 | mc->ctx = ctx; | |
225 | list_add_tail(&mc->list, &ctx->mc_list); | |
226 | return mc; | |
227 | ||
228 | error: | |
229 | kfree(mc); | |
230 | return NULL; | |
231 | } | |
232 | ||
75216638 SH |
233 | static void ucma_copy_conn_event(struct rdma_ucm_conn_param *dst, |
234 | struct rdma_conn_param *src) | |
235 | { | |
236 | if (src->private_data_len) | |
237 | memcpy(dst->private_data, src->private_data, | |
238 | src->private_data_len); | |
239 | dst->private_data_len = src->private_data_len; | |
240 | dst->responder_resources =src->responder_resources; | |
241 | dst->initiator_depth = src->initiator_depth; | |
242 | dst->flow_control = src->flow_control; | |
243 | dst->retry_count = src->retry_count; | |
244 | dst->rnr_retry_count = src->rnr_retry_count; | |
245 | dst->srq = src->srq; | |
246 | dst->qp_num = src->qp_num; | |
247 | } | |
248 | ||
249 | static void ucma_copy_ud_event(struct rdma_ucm_ud_param *dst, | |
250 | struct rdma_ud_param *src) | |
251 | { | |
252 | if (src->private_data_len) | |
253 | memcpy(dst->private_data, src->private_data, | |
254 | src->private_data_len); | |
255 | dst->private_data_len = src->private_data_len; | |
256 | ib_copy_ah_attr_to_user(&dst->ah_attr, &src->ah_attr); | |
257 | dst->qp_num = src->qp_num; | |
258 | dst->qkey = src->qkey; | |
259 | } | |
260 | ||
261 | static void ucma_set_event_context(struct ucma_context *ctx, | |
262 | struct rdma_cm_event *event, | |
263 | struct ucma_event *uevent) | |
264 | { | |
265 | uevent->ctx = ctx; | |
c8f6a362 SH |
266 | switch (event->event) { |
267 | case RDMA_CM_EVENT_MULTICAST_JOIN: | |
268 | case RDMA_CM_EVENT_MULTICAST_ERROR: | |
269 | uevent->mc = (struct ucma_multicast *) | |
270 | event->param.ud.private_data; | |
271 | uevent->resp.uid = uevent->mc->uid; | |
272 | uevent->resp.id = uevent->mc->id; | |
273 | break; | |
274 | default: | |
275 | uevent->resp.uid = ctx->uid; | |
276 | uevent->resp.id = ctx->id; | |
277 | break; | |
278 | } | |
75216638 SH |
279 | } |
280 | ||
e1c30298 YH |
281 | /* Called with file->mut locked for the relevant context. */ |
282 | static void ucma_removal_event_handler(struct rdma_cm_id *cm_id) | |
283 | { | |
284 | struct ucma_context *ctx = cm_id->context; | |
285 | struct ucma_event *con_req_eve; | |
286 | int event_found = 0; | |
287 | ||
288 | if (ctx->destroying) | |
289 | return; | |
290 | ||
291 | /* only if context is pointing to cm_id that it owns it and can be | |
292 | * queued to be closed, otherwise that cm_id is an inflight one that | |
293 | * is part of that context event list pending to be detached and | |
294 | * reattached to its new context as part of ucma_get_event, | |
295 | * handled separately below. | |
296 | */ | |
297 | if (ctx->cm_id == cm_id) { | |
298 | mutex_lock(&mut); | |
299 | ctx->closing = 1; | |
300 | mutex_unlock(&mut); | |
301 | queue_work(ctx->file->close_wq, &ctx->close_work); | |
302 | return; | |
303 | } | |
304 | ||
305 | list_for_each_entry(con_req_eve, &ctx->file->event_list, list) { | |
306 | if (con_req_eve->cm_id == cm_id && | |
307 | con_req_eve->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) { | |
308 | list_del(&con_req_eve->list); | |
309 | INIT_WORK(&con_req_eve->close_work, ucma_close_event_id); | |
310 | queue_work(ctx->file->close_wq, &con_req_eve->close_work); | |
311 | event_found = 1; | |
312 | break; | |
313 | } | |
314 | } | |
315 | if (!event_found) | |
316 | printk(KERN_ERR "ucma_removal_event_handler: warning: connect request event wasn't found\n"); | |
317 | } | |
318 | ||
75216638 SH |
319 | static int ucma_event_handler(struct rdma_cm_id *cm_id, |
320 | struct rdma_cm_event *event) | |
321 | { | |
322 | struct ucma_event *uevent; | |
323 | struct ucma_context *ctx = cm_id->context; | |
324 | int ret = 0; | |
325 | ||
326 | uevent = kzalloc(sizeof(*uevent), GFP_KERNEL); | |
327 | if (!uevent) | |
328 | return event->event == RDMA_CM_EVENT_CONNECT_REQUEST; | |
329 | ||
418edaab | 330 | mutex_lock(&ctx->file->mut); |
75216638 SH |
331 | uevent->cm_id = cm_id; |
332 | ucma_set_event_context(ctx, event, uevent); | |
333 | uevent->resp.event = event->event; | |
334 | uevent->resp.status = event->status; | |
638ef7a6 | 335 | if (cm_id->qp_type == IB_QPT_UD) |
75216638 SH |
336 | ucma_copy_ud_event(&uevent->resp.param.ud, &event->param.ud); |
337 | else | |
338 | ucma_copy_conn_event(&uevent->resp.param.conn, | |
339 | &event->param.conn); | |
340 | ||
75216638 SH |
341 | if (event->event == RDMA_CM_EVENT_CONNECT_REQUEST) { |
342 | if (!ctx->backlog) { | |
3492856e | 343 | ret = -ENOMEM; |
30a5ec98 | 344 | kfree(uevent); |
75216638 SH |
345 | goto out; |
346 | } | |
347 | ctx->backlog--; | |
c6b21824 | 348 | } else if (!ctx->uid || ctx->cm_id != cm_id) { |
0cefcf0b SH |
349 | /* |
350 | * We ignore events for new connections until userspace has set | |
351 | * their context. This can only happen if an error occurs on a | |
352 | * new connection before the user accepts it. This is okay, | |
e1c30298 YH |
353 | * since the accept will just fail later. However, we do need |
354 | * to release the underlying HW resources in case of a device | |
355 | * removal event. | |
0cefcf0b | 356 | */ |
e1c30298 YH |
357 | if (event->event == RDMA_CM_EVENT_DEVICE_REMOVAL) |
358 | ucma_removal_event_handler(cm_id); | |
359 | ||
0cefcf0b SH |
360 | kfree(uevent); |
361 | goto out; | |
75216638 | 362 | } |
0cefcf0b | 363 | |
75216638 SH |
364 | list_add_tail(&uevent->list, &ctx->file->event_list); |
365 | wake_up_interruptible(&ctx->file->poll_wait); | |
e1c30298 YH |
366 | if (event->event == RDMA_CM_EVENT_DEVICE_REMOVAL) |
367 | ucma_removal_event_handler(cm_id); | |
75216638 SH |
368 | out: |
369 | mutex_unlock(&ctx->file->mut); | |
370 | return ret; | |
371 | } | |
372 | ||
373 | static ssize_t ucma_get_event(struct ucma_file *file, const char __user *inbuf, | |
374 | int in_len, int out_len) | |
375 | { | |
376 | struct ucma_context *ctx; | |
377 | struct rdma_ucm_get_event cmd; | |
378 | struct ucma_event *uevent; | |
379 | int ret = 0; | |
75216638 SH |
380 | |
381 | if (out_len < sizeof uevent->resp) | |
382 | return -ENOSPC; | |
383 | ||
384 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
385 | return -EFAULT; | |
386 | ||
387 | mutex_lock(&file->mut); | |
388 | while (list_empty(&file->event_list)) { | |
d92f7644 | 389 | mutex_unlock(&file->mut); |
75216638 | 390 | |
d92f7644 SH |
391 | if (file->filp->f_flags & O_NONBLOCK) |
392 | return -EAGAIN; | |
393 | ||
394 | if (wait_event_interruptible(file->poll_wait, | |
395 | !list_empty(&file->event_list))) | |
396 | return -ERESTARTSYS; | |
75216638 | 397 | |
75216638 | 398 | mutex_lock(&file->mut); |
75216638 SH |
399 | } |
400 | ||
75216638 SH |
401 | uevent = list_entry(file->event_list.next, struct ucma_event, list); |
402 | ||
403 | if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) { | |
404 | ctx = ucma_alloc_ctx(file); | |
405 | if (!ctx) { | |
406 | ret = -ENOMEM; | |
407 | goto done; | |
408 | } | |
409 | uevent->ctx->backlog++; | |
410 | ctx->cm_id = uevent->cm_id; | |
411 | ctx->cm_id->context = ctx; | |
412 | uevent->resp.id = ctx->id; | |
413 | } | |
414 | ||
415 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
416 | &uevent->resp, sizeof uevent->resp)) { | |
417 | ret = -EFAULT; | |
418 | goto done; | |
419 | } | |
420 | ||
421 | list_del(&uevent->list); | |
422 | uevent->ctx->events_reported++; | |
c8f6a362 SH |
423 | if (uevent->mc) |
424 | uevent->mc->events_reported++; | |
75216638 SH |
425 | kfree(uevent); |
426 | done: | |
427 | mutex_unlock(&file->mut); | |
428 | return ret; | |
429 | } | |
430 | ||
b26f9b99 SH |
431 | static int ucma_get_qp_type(struct rdma_ucm_create_id *cmd, enum ib_qp_type *qp_type) |
432 | { | |
433 | switch (cmd->ps) { | |
434 | case RDMA_PS_TCP: | |
435 | *qp_type = IB_QPT_RC; | |
436 | return 0; | |
437 | case RDMA_PS_UDP: | |
438 | case RDMA_PS_IPOIB: | |
439 | *qp_type = IB_QPT_UD; | |
440 | return 0; | |
638ef7a6 SH |
441 | case RDMA_PS_IB: |
442 | *qp_type = cmd->qp_type; | |
443 | return 0; | |
b26f9b99 SH |
444 | default: |
445 | return -EINVAL; | |
446 | } | |
447 | } | |
448 | ||
449 | static ssize_t ucma_create_id(struct ucma_file *file, const char __user *inbuf, | |
450 | int in_len, int out_len) | |
75216638 SH |
451 | { |
452 | struct rdma_ucm_create_id cmd; | |
453 | struct rdma_ucm_create_id_resp resp; | |
454 | struct ucma_context *ctx; | |
b26f9b99 | 455 | enum ib_qp_type qp_type; |
75216638 SH |
456 | int ret; |
457 | ||
458 | if (out_len < sizeof(resp)) | |
459 | return -ENOSPC; | |
460 | ||
461 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
462 | return -EFAULT; | |
463 | ||
b26f9b99 SH |
464 | ret = ucma_get_qp_type(&cmd, &qp_type); |
465 | if (ret) | |
466 | return ret; | |
467 | ||
75216638 SH |
468 | mutex_lock(&file->mut); |
469 | ctx = ucma_alloc_ctx(file); | |
470 | mutex_unlock(&file->mut); | |
471 | if (!ctx) | |
472 | return -ENOMEM; | |
473 | ||
474 | ctx->uid = cmd.uid; | |
b26f9b99 | 475 | ctx->cm_id = rdma_create_id(ucma_event_handler, ctx, cmd.ps, qp_type); |
75216638 SH |
476 | if (IS_ERR(ctx->cm_id)) { |
477 | ret = PTR_ERR(ctx->cm_id); | |
478 | goto err1; | |
479 | } | |
480 | ||
481 | resp.id = ctx->id; | |
482 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
483 | &resp, sizeof(resp))) { | |
484 | ret = -EFAULT; | |
485 | goto err2; | |
486 | } | |
487 | return 0; | |
488 | ||
489 | err2: | |
490 | rdma_destroy_id(ctx->cm_id); | |
491 | err1: | |
492 | mutex_lock(&mut); | |
493 | idr_remove(&ctx_idr, ctx->id); | |
494 | mutex_unlock(&mut); | |
495 | kfree(ctx); | |
496 | return ret; | |
497 | } | |
498 | ||
c8f6a362 SH |
499 | static void ucma_cleanup_multicast(struct ucma_context *ctx) |
500 | { | |
501 | struct ucma_multicast *mc, *tmp; | |
502 | ||
503 | mutex_lock(&mut); | |
504 | list_for_each_entry_safe(mc, tmp, &ctx->mc_list, list) { | |
505 | list_del(&mc->list); | |
506 | idr_remove(&multicast_idr, mc->id); | |
507 | kfree(mc); | |
508 | } | |
509 | mutex_unlock(&mut); | |
510 | } | |
511 | ||
c8f6a362 SH |
512 | static void ucma_cleanup_mc_events(struct ucma_multicast *mc) |
513 | { | |
514 | struct ucma_event *uevent, *tmp; | |
515 | ||
516 | list_for_each_entry_safe(uevent, tmp, &mc->ctx->file->event_list, list) { | |
517 | if (uevent->mc != mc) | |
518 | continue; | |
519 | ||
520 | list_del(&uevent->list); | |
521 | kfree(uevent); | |
522 | } | |
523 | } | |
524 | ||
186834b5 | 525 | /* |
e1c30298 YH |
526 | * ucma_free_ctx is called after the underlying rdma CM-ID is destroyed. At |
527 | * this point, no new events will be reported from the hardware. However, we | |
528 | * still need to cleanup the UCMA context for this ID. Specifically, there | |
529 | * might be events that have not yet been consumed by the user space software. | |
530 | * These might include pending connect requests which we have not completed | |
531 | * processing. We cannot call rdma_destroy_id while holding the lock of the | |
532 | * context (file->mut), as it might cause a deadlock. We therefore extract all | |
533 | * relevant events from the context pending events list while holding the | |
534 | * mutex. After that we release them as needed. | |
186834b5 | 535 | */ |
75216638 SH |
536 | static int ucma_free_ctx(struct ucma_context *ctx) |
537 | { | |
538 | int events_reported; | |
186834b5 HS |
539 | struct ucma_event *uevent, *tmp; |
540 | LIST_HEAD(list); | |
75216638 | 541 | |
75216638 | 542 | |
c8f6a362 SH |
543 | ucma_cleanup_multicast(ctx); |
544 | ||
75216638 SH |
545 | /* Cleanup events not yet reported to the user. */ |
546 | mutex_lock(&ctx->file->mut); | |
186834b5 HS |
547 | list_for_each_entry_safe(uevent, tmp, &ctx->file->event_list, list) { |
548 | if (uevent->ctx == ctx) | |
549 | list_move_tail(&uevent->list, &list); | |
550 | } | |
75216638 SH |
551 | list_del(&ctx->list); |
552 | mutex_unlock(&ctx->file->mut); | |
553 | ||
186834b5 HS |
554 | list_for_each_entry_safe(uevent, tmp, &list, list) { |
555 | list_del(&uevent->list); | |
556 | if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) | |
557 | rdma_destroy_id(uevent->cm_id); | |
558 | kfree(uevent); | |
559 | } | |
560 | ||
75216638 SH |
561 | events_reported = ctx->events_reported; |
562 | kfree(ctx); | |
563 | return events_reported; | |
564 | } | |
565 | ||
566 | static ssize_t ucma_destroy_id(struct ucma_file *file, const char __user *inbuf, | |
567 | int in_len, int out_len) | |
568 | { | |
569 | struct rdma_ucm_destroy_id cmd; | |
570 | struct rdma_ucm_destroy_id_resp resp; | |
571 | struct ucma_context *ctx; | |
572 | int ret = 0; | |
573 | ||
574 | if (out_len < sizeof(resp)) | |
575 | return -ENOSPC; | |
576 | ||
577 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
578 | return -EFAULT; | |
579 | ||
580 | mutex_lock(&mut); | |
581 | ctx = _ucma_find_context(cmd.id, file); | |
582 | if (!IS_ERR(ctx)) | |
583 | idr_remove(&ctx_idr, ctx->id); | |
584 | mutex_unlock(&mut); | |
585 | ||
586 | if (IS_ERR(ctx)) | |
587 | return PTR_ERR(ctx); | |
588 | ||
e1c30298 YH |
589 | mutex_lock(&ctx->file->mut); |
590 | ctx->destroying = 1; | |
591 | mutex_unlock(&ctx->file->mut); | |
592 | ||
593 | flush_workqueue(ctx->file->close_wq); | |
594 | /* At this point it's guaranteed that there is no inflight | |
595 | * closing task */ | |
596 | mutex_lock(&mut); | |
597 | if (!ctx->closing) { | |
598 | mutex_unlock(&mut); | |
599 | ucma_put_ctx(ctx); | |
600 | wait_for_completion(&ctx->comp); | |
601 | rdma_destroy_id(ctx->cm_id); | |
602 | } else { | |
603 | mutex_unlock(&mut); | |
604 | } | |
75216638 | 605 | |
e1c30298 | 606 | resp.events_reported = ucma_free_ctx(ctx); |
75216638 SH |
607 | if (copy_to_user((void __user *)(unsigned long)cmd.response, |
608 | &resp, sizeof(resp))) | |
609 | ret = -EFAULT; | |
610 | ||
611 | return ret; | |
612 | } | |
613 | ||
05ad9457 | 614 | static ssize_t ucma_bind_ip(struct ucma_file *file, const char __user *inbuf, |
75216638 SH |
615 | int in_len, int out_len) |
616 | { | |
05ad9457 | 617 | struct rdma_ucm_bind_ip cmd; |
75216638 SH |
618 | struct ucma_context *ctx; |
619 | int ret; | |
620 | ||
621 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
622 | return -EFAULT; | |
623 | ||
624 | ctx = ucma_get_ctx(file, cmd.id); | |
625 | if (IS_ERR(ctx)) | |
626 | return PTR_ERR(ctx); | |
627 | ||
628 | ret = rdma_bind_addr(ctx->cm_id, (struct sockaddr *) &cmd.addr); | |
629 | ucma_put_ctx(ctx); | |
630 | return ret; | |
631 | } | |
632 | ||
eebe4c3a SH |
633 | static ssize_t ucma_bind(struct ucma_file *file, const char __user *inbuf, |
634 | int in_len, int out_len) | |
635 | { | |
636 | struct rdma_ucm_bind cmd; | |
637 | struct sockaddr *addr; | |
638 | struct ucma_context *ctx; | |
639 | int ret; | |
640 | ||
641 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
642 | return -EFAULT; | |
643 | ||
644 | addr = (struct sockaddr *) &cmd.addr; | |
645 | if (cmd.reserved || !cmd.addr_size || (cmd.addr_size != rdma_addr_size(addr))) | |
646 | return -EINVAL; | |
647 | ||
648 | ctx = ucma_get_ctx(file, cmd.id); | |
649 | if (IS_ERR(ctx)) | |
650 | return PTR_ERR(ctx); | |
651 | ||
652 | ret = rdma_bind_addr(ctx->cm_id, addr); | |
653 | ucma_put_ctx(ctx); | |
654 | return ret; | |
655 | } | |
656 | ||
05ad9457 SH |
657 | static ssize_t ucma_resolve_ip(struct ucma_file *file, |
658 | const char __user *inbuf, | |
659 | int in_len, int out_len) | |
75216638 | 660 | { |
05ad9457 | 661 | struct rdma_ucm_resolve_ip cmd; |
75216638 SH |
662 | struct ucma_context *ctx; |
663 | int ret; | |
664 | ||
665 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
666 | return -EFAULT; | |
667 | ||
668 | ctx = ucma_get_ctx(file, cmd.id); | |
669 | if (IS_ERR(ctx)) | |
670 | return PTR_ERR(ctx); | |
671 | ||
672 | ret = rdma_resolve_addr(ctx->cm_id, (struct sockaddr *) &cmd.src_addr, | |
673 | (struct sockaddr *) &cmd.dst_addr, | |
674 | cmd.timeout_ms); | |
675 | ucma_put_ctx(ctx); | |
676 | return ret; | |
677 | } | |
678 | ||
209cf2a7 SH |
679 | static ssize_t ucma_resolve_addr(struct ucma_file *file, |
680 | const char __user *inbuf, | |
681 | int in_len, int out_len) | |
682 | { | |
683 | struct rdma_ucm_resolve_addr cmd; | |
684 | struct sockaddr *src, *dst; | |
685 | struct ucma_context *ctx; | |
686 | int ret; | |
687 | ||
688 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
689 | return -EFAULT; | |
690 | ||
691 | src = (struct sockaddr *) &cmd.src_addr; | |
692 | dst = (struct sockaddr *) &cmd.dst_addr; | |
693 | if (cmd.reserved || (cmd.src_size && (cmd.src_size != rdma_addr_size(src))) || | |
694 | !cmd.dst_size || (cmd.dst_size != rdma_addr_size(dst))) | |
695 | return -EINVAL; | |
696 | ||
697 | ctx = ucma_get_ctx(file, cmd.id); | |
698 | if (IS_ERR(ctx)) | |
699 | return PTR_ERR(ctx); | |
700 | ||
701 | ret = rdma_resolve_addr(ctx->cm_id, src, dst, cmd.timeout_ms); | |
702 | ucma_put_ctx(ctx); | |
703 | return ret; | |
704 | } | |
705 | ||
75216638 SH |
706 | static ssize_t ucma_resolve_route(struct ucma_file *file, |
707 | const char __user *inbuf, | |
708 | int in_len, int out_len) | |
709 | { | |
710 | struct rdma_ucm_resolve_route cmd; | |
711 | struct ucma_context *ctx; | |
712 | int ret; | |
713 | ||
714 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
715 | return -EFAULT; | |
716 | ||
717 | ctx = ucma_get_ctx(file, cmd.id); | |
718 | if (IS_ERR(ctx)) | |
719 | return PTR_ERR(ctx); | |
720 | ||
721 | ret = rdma_resolve_route(ctx->cm_id, cmd.timeout_ms); | |
722 | ucma_put_ctx(ctx); | |
723 | return ret; | |
724 | } | |
725 | ||
726 | static void ucma_copy_ib_route(struct rdma_ucm_query_route_resp *resp, | |
727 | struct rdma_route *route) | |
728 | { | |
729 | struct rdma_dev_addr *dev_addr; | |
730 | ||
731 | resp->num_paths = route->num_paths; | |
732 | switch (route->num_paths) { | |
733 | case 0: | |
734 | dev_addr = &route->addr.dev_addr; | |
6f8372b6 SH |
735 | rdma_addr_get_dgid(dev_addr, |
736 | (union ib_gid *) &resp->ib_route[0].dgid); | |
737 | rdma_addr_get_sgid(dev_addr, | |
738 | (union ib_gid *) &resp->ib_route[0].sgid); | |
75216638 SH |
739 | resp->ib_route[0].pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); |
740 | break; | |
741 | case 2: | |
742 | ib_copy_path_rec_to_user(&resp->ib_route[1], | |
743 | &route->path_rec[1]); | |
744 | /* fall through */ | |
745 | case 1: | |
746 | ib_copy_path_rec_to_user(&resp->ib_route[0], | |
747 | &route->path_rec[0]); | |
748 | break; | |
749 | default: | |
750 | break; | |
751 | } | |
752 | } | |
753 | ||
3c86aa70 EC |
754 | static void ucma_copy_iboe_route(struct rdma_ucm_query_route_resp *resp, |
755 | struct rdma_route *route) | |
756 | { | |
3c86aa70 EC |
757 | |
758 | resp->num_paths = route->num_paths; | |
759 | switch (route->num_paths) { | |
760 | case 0: | |
7b85627b MS |
761 | rdma_ip2gid((struct sockaddr *)&route->addr.dst_addr, |
762 | (union ib_gid *)&resp->ib_route[0].dgid); | |
763 | rdma_ip2gid((struct sockaddr *)&route->addr.src_addr, | |
764 | (union ib_gid *)&resp->ib_route[0].sgid); | |
3c86aa70 EC |
765 | resp->ib_route[0].pkey = cpu_to_be16(0xffff); |
766 | break; | |
767 | case 2: | |
768 | ib_copy_path_rec_to_user(&resp->ib_route[1], | |
769 | &route->path_rec[1]); | |
770 | /* fall through */ | |
771 | case 1: | |
772 | ib_copy_path_rec_to_user(&resp->ib_route[0], | |
773 | &route->path_rec[0]); | |
774 | break; | |
775 | default: | |
776 | break; | |
777 | } | |
778 | } | |
779 | ||
e86f8b06 SW |
780 | static void ucma_copy_iw_route(struct rdma_ucm_query_route_resp *resp, |
781 | struct rdma_route *route) | |
782 | { | |
783 | struct rdma_dev_addr *dev_addr; | |
784 | ||
785 | dev_addr = &route->addr.dev_addr; | |
786 | rdma_addr_get_dgid(dev_addr, (union ib_gid *) &resp->ib_route[0].dgid); | |
787 | rdma_addr_get_sgid(dev_addr, (union ib_gid *) &resp->ib_route[0].sgid); | |
788 | } | |
789 | ||
75216638 SH |
790 | static ssize_t ucma_query_route(struct ucma_file *file, |
791 | const char __user *inbuf, | |
792 | int in_len, int out_len) | |
793 | { | |
ee7aed45 | 794 | struct rdma_ucm_query cmd; |
75216638 SH |
795 | struct rdma_ucm_query_route_resp resp; |
796 | struct ucma_context *ctx; | |
797 | struct sockaddr *addr; | |
798 | int ret = 0; | |
799 | ||
800 | if (out_len < sizeof(resp)) | |
801 | return -ENOSPC; | |
802 | ||
803 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
804 | return -EFAULT; | |
805 | ||
806 | ctx = ucma_get_ctx(file, cmd.id); | |
807 | if (IS_ERR(ctx)) | |
808 | return PTR_ERR(ctx); | |
809 | ||
810 | memset(&resp, 0, sizeof resp); | |
3f446754 | 811 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.src_addr; |
75216638 SH |
812 | memcpy(&resp.src_addr, addr, addr->sa_family == AF_INET ? |
813 | sizeof(struct sockaddr_in) : | |
814 | sizeof(struct sockaddr_in6)); | |
3f446754 | 815 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.dst_addr; |
75216638 SH |
816 | memcpy(&resp.dst_addr, addr, addr->sa_family == AF_INET ? |
817 | sizeof(struct sockaddr_in) : | |
818 | sizeof(struct sockaddr_in6)); | |
819 | if (!ctx->cm_id->device) | |
820 | goto out; | |
821 | ||
9cda779c | 822 | resp.node_guid = (__force __u64) ctx->cm_id->device->node_guid; |
75216638 | 823 | resp.port_num = ctx->cm_id->port_num; |
c72f2189 | 824 | |
fe53ba2f | 825 | if (rdma_cap_ib_sa(ctx->cm_id->device, ctx->cm_id->port_num)) |
c72f2189 | 826 | ucma_copy_ib_route(&resp, &ctx->cm_id->route); |
5d9fb044 | 827 | else if (rdma_protocol_roce(ctx->cm_id->device, ctx->cm_id->port_num)) |
c72f2189 MW |
828 | ucma_copy_iboe_route(&resp, &ctx->cm_id->route); |
829 | else if (rdma_protocol_iwarp(ctx->cm_id->device, ctx->cm_id->port_num)) | |
e86f8b06 | 830 | ucma_copy_iw_route(&resp, &ctx->cm_id->route); |
75216638 SH |
831 | |
832 | out: | |
833 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
834 | &resp, sizeof(resp))) | |
835 | ret = -EFAULT; | |
836 | ||
837 | ucma_put_ctx(ctx); | |
838 | return ret; | |
839 | } | |
840 | ||
ee7aed45 SH |
841 | static void ucma_query_device_addr(struct rdma_cm_id *cm_id, |
842 | struct rdma_ucm_query_addr_resp *resp) | |
843 | { | |
844 | if (!cm_id->device) | |
845 | return; | |
846 | ||
847 | resp->node_guid = (__force __u64) cm_id->device->node_guid; | |
848 | resp->port_num = cm_id->port_num; | |
849 | resp->pkey = (__force __u16) cpu_to_be16( | |
850 | ib_addr_get_pkey(&cm_id->route.addr.dev_addr)); | |
851 | } | |
852 | ||
853 | static ssize_t ucma_query_addr(struct ucma_context *ctx, | |
854 | void __user *response, int out_len) | |
855 | { | |
856 | struct rdma_ucm_query_addr_resp resp; | |
857 | struct sockaddr *addr; | |
858 | int ret = 0; | |
859 | ||
860 | if (out_len < sizeof(resp)) | |
861 | return -ENOSPC; | |
862 | ||
863 | memset(&resp, 0, sizeof resp); | |
864 | ||
865 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.src_addr; | |
866 | resp.src_size = rdma_addr_size(addr); | |
867 | memcpy(&resp.src_addr, addr, resp.src_size); | |
868 | ||
869 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.dst_addr; | |
870 | resp.dst_size = rdma_addr_size(addr); | |
871 | memcpy(&resp.dst_addr, addr, resp.dst_size); | |
872 | ||
873 | ucma_query_device_addr(ctx->cm_id, &resp); | |
874 | ||
875 | if (copy_to_user(response, &resp, sizeof(resp))) | |
876 | ret = -EFAULT; | |
877 | ||
878 | return ret; | |
879 | } | |
880 | ||
ac53b264 SH |
881 | static ssize_t ucma_query_path(struct ucma_context *ctx, |
882 | void __user *response, int out_len) | |
883 | { | |
884 | struct rdma_ucm_query_path_resp *resp; | |
885 | int i, ret = 0; | |
886 | ||
887 | if (out_len < sizeof(*resp)) | |
888 | return -ENOSPC; | |
889 | ||
890 | resp = kzalloc(out_len, GFP_KERNEL); | |
891 | if (!resp) | |
892 | return -ENOMEM; | |
893 | ||
894 | resp->num_paths = ctx->cm_id->route.num_paths; | |
895 | for (i = 0, out_len -= sizeof(*resp); | |
896 | i < resp->num_paths && out_len > sizeof(struct ib_path_rec_data); | |
897 | i++, out_len -= sizeof(struct ib_path_rec_data)) { | |
898 | ||
899 | resp->path_data[i].flags = IB_PATH_GMP | IB_PATH_PRIMARY | | |
900 | IB_PATH_BIDIRECTIONAL; | |
901 | ib_sa_pack_path(&ctx->cm_id->route.path_rec[i], | |
902 | &resp->path_data[i].path_rec); | |
903 | } | |
904 | ||
905 | if (copy_to_user(response, resp, | |
906 | sizeof(*resp) + (i * sizeof(struct ib_path_rec_data)))) | |
907 | ret = -EFAULT; | |
908 | ||
909 | kfree(resp); | |
910 | return ret; | |
911 | } | |
912 | ||
edaa7a55 SH |
913 | static ssize_t ucma_query_gid(struct ucma_context *ctx, |
914 | void __user *response, int out_len) | |
915 | { | |
916 | struct rdma_ucm_query_addr_resp resp; | |
917 | struct sockaddr_ib *addr; | |
918 | int ret = 0; | |
919 | ||
920 | if (out_len < sizeof(resp)) | |
921 | return -ENOSPC; | |
922 | ||
923 | memset(&resp, 0, sizeof resp); | |
924 | ||
925 | ucma_query_device_addr(ctx->cm_id, &resp); | |
926 | ||
927 | addr = (struct sockaddr_ib *) &resp.src_addr; | |
928 | resp.src_size = sizeof(*addr); | |
929 | if (ctx->cm_id->route.addr.src_addr.ss_family == AF_IB) { | |
930 | memcpy(addr, &ctx->cm_id->route.addr.src_addr, resp.src_size); | |
931 | } else { | |
932 | addr->sib_family = AF_IB; | |
933 | addr->sib_pkey = (__force __be16) resp.pkey; | |
934 | rdma_addr_get_sgid(&ctx->cm_id->route.addr.dev_addr, | |
935 | (union ib_gid *) &addr->sib_addr); | |
936 | addr->sib_sid = rdma_get_service_id(ctx->cm_id, (struct sockaddr *) | |
937 | &ctx->cm_id->route.addr.src_addr); | |
938 | } | |
939 | ||
940 | addr = (struct sockaddr_ib *) &resp.dst_addr; | |
941 | resp.dst_size = sizeof(*addr); | |
942 | if (ctx->cm_id->route.addr.dst_addr.ss_family == AF_IB) { | |
943 | memcpy(addr, &ctx->cm_id->route.addr.dst_addr, resp.dst_size); | |
944 | } else { | |
945 | addr->sib_family = AF_IB; | |
946 | addr->sib_pkey = (__force __be16) resp.pkey; | |
947 | rdma_addr_get_dgid(&ctx->cm_id->route.addr.dev_addr, | |
948 | (union ib_gid *) &addr->sib_addr); | |
949 | addr->sib_sid = rdma_get_service_id(ctx->cm_id, (struct sockaddr *) | |
950 | &ctx->cm_id->route.addr.dst_addr); | |
951 | } | |
952 | ||
953 | if (copy_to_user(response, &resp, sizeof(resp))) | |
954 | ret = -EFAULT; | |
955 | ||
956 | return ret; | |
957 | } | |
958 | ||
ee7aed45 SH |
959 | static ssize_t ucma_query(struct ucma_file *file, |
960 | const char __user *inbuf, | |
961 | int in_len, int out_len) | |
962 | { | |
963 | struct rdma_ucm_query cmd; | |
964 | struct ucma_context *ctx; | |
965 | void __user *response; | |
966 | int ret; | |
967 | ||
968 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
969 | return -EFAULT; | |
970 | ||
971 | response = (void __user *)(unsigned long) cmd.response; | |
972 | ctx = ucma_get_ctx(file, cmd.id); | |
973 | if (IS_ERR(ctx)) | |
974 | return PTR_ERR(ctx); | |
975 | ||
976 | switch (cmd.option) { | |
977 | case RDMA_USER_CM_QUERY_ADDR: | |
978 | ret = ucma_query_addr(ctx, response, out_len); | |
979 | break; | |
ac53b264 SH |
980 | case RDMA_USER_CM_QUERY_PATH: |
981 | ret = ucma_query_path(ctx, response, out_len); | |
982 | break; | |
edaa7a55 SH |
983 | case RDMA_USER_CM_QUERY_GID: |
984 | ret = ucma_query_gid(ctx, response, out_len); | |
985 | break; | |
ee7aed45 SH |
986 | default: |
987 | ret = -ENOSYS; | |
988 | break; | |
989 | } | |
990 | ||
991 | ucma_put_ctx(ctx); | |
992 | return ret; | |
993 | } | |
994 | ||
5c438135 SH |
995 | static void ucma_copy_conn_param(struct rdma_cm_id *id, |
996 | struct rdma_conn_param *dst, | |
75216638 SH |
997 | struct rdma_ucm_conn_param *src) |
998 | { | |
999 | dst->private_data = src->private_data; | |
1000 | dst->private_data_len = src->private_data_len; | |
1001 | dst->responder_resources =src->responder_resources; | |
1002 | dst->initiator_depth = src->initiator_depth; | |
1003 | dst->flow_control = src->flow_control; | |
1004 | dst->retry_count = src->retry_count; | |
1005 | dst->rnr_retry_count = src->rnr_retry_count; | |
1006 | dst->srq = src->srq; | |
1007 | dst->qp_num = src->qp_num; | |
5c438135 | 1008 | dst->qkey = (id->route.addr.src_addr.ss_family == AF_IB) ? src->qkey : 0; |
75216638 SH |
1009 | } |
1010 | ||
1011 | static ssize_t ucma_connect(struct ucma_file *file, const char __user *inbuf, | |
1012 | int in_len, int out_len) | |
1013 | { | |
1014 | struct rdma_ucm_connect cmd; | |
1015 | struct rdma_conn_param conn_param; | |
1016 | struct ucma_context *ctx; | |
1017 | int ret; | |
1018 | ||
1019 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1020 | return -EFAULT; | |
1021 | ||
1022 | if (!cmd.conn_param.valid) | |
1023 | return -EINVAL; | |
1024 | ||
1025 | ctx = ucma_get_ctx(file, cmd.id); | |
1026 | if (IS_ERR(ctx)) | |
1027 | return PTR_ERR(ctx); | |
1028 | ||
5c438135 | 1029 | ucma_copy_conn_param(ctx->cm_id, &conn_param, &cmd.conn_param); |
75216638 SH |
1030 | ret = rdma_connect(ctx->cm_id, &conn_param); |
1031 | ucma_put_ctx(ctx); | |
1032 | return ret; | |
1033 | } | |
1034 | ||
1035 | static ssize_t ucma_listen(struct ucma_file *file, const char __user *inbuf, | |
1036 | int in_len, int out_len) | |
1037 | { | |
1038 | struct rdma_ucm_listen cmd; | |
1039 | struct ucma_context *ctx; | |
1040 | int ret; | |
1041 | ||
1042 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1043 | return -EFAULT; | |
1044 | ||
1045 | ctx = ucma_get_ctx(file, cmd.id); | |
1046 | if (IS_ERR(ctx)) | |
1047 | return PTR_ERR(ctx); | |
1048 | ||
97cb7e40 SW |
1049 | ctx->backlog = cmd.backlog > 0 && cmd.backlog < max_backlog ? |
1050 | cmd.backlog : max_backlog; | |
75216638 SH |
1051 | ret = rdma_listen(ctx->cm_id, ctx->backlog); |
1052 | ucma_put_ctx(ctx); | |
1053 | return ret; | |
1054 | } | |
1055 | ||
1056 | static ssize_t ucma_accept(struct ucma_file *file, const char __user *inbuf, | |
1057 | int in_len, int out_len) | |
1058 | { | |
1059 | struct rdma_ucm_accept cmd; | |
1060 | struct rdma_conn_param conn_param; | |
1061 | struct ucma_context *ctx; | |
1062 | int ret; | |
1063 | ||
1064 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1065 | return -EFAULT; | |
1066 | ||
1067 | ctx = ucma_get_ctx(file, cmd.id); | |
1068 | if (IS_ERR(ctx)) | |
1069 | return PTR_ERR(ctx); | |
1070 | ||
1071 | if (cmd.conn_param.valid) { | |
5c438135 | 1072 | ucma_copy_conn_param(ctx->cm_id, &conn_param, &cmd.conn_param); |
9ced69ca | 1073 | mutex_lock(&file->mut); |
75216638 | 1074 | ret = rdma_accept(ctx->cm_id, &conn_param); |
9ced69ca SH |
1075 | if (!ret) |
1076 | ctx->uid = cmd.uid; | |
1077 | mutex_unlock(&file->mut); | |
75216638 SH |
1078 | } else |
1079 | ret = rdma_accept(ctx->cm_id, NULL); | |
1080 | ||
1081 | ucma_put_ctx(ctx); | |
1082 | return ret; | |
1083 | } | |
1084 | ||
1085 | static ssize_t ucma_reject(struct ucma_file *file, const char __user *inbuf, | |
1086 | int in_len, int out_len) | |
1087 | { | |
1088 | struct rdma_ucm_reject cmd; | |
1089 | struct ucma_context *ctx; | |
1090 | int ret; | |
1091 | ||
1092 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1093 | return -EFAULT; | |
1094 | ||
1095 | ctx = ucma_get_ctx(file, cmd.id); | |
1096 | if (IS_ERR(ctx)) | |
1097 | return PTR_ERR(ctx); | |
1098 | ||
1099 | ret = rdma_reject(ctx->cm_id, cmd.private_data, cmd.private_data_len); | |
1100 | ucma_put_ctx(ctx); | |
1101 | return ret; | |
1102 | } | |
1103 | ||
1104 | static ssize_t ucma_disconnect(struct ucma_file *file, const char __user *inbuf, | |
1105 | int in_len, int out_len) | |
1106 | { | |
1107 | struct rdma_ucm_disconnect cmd; | |
1108 | struct ucma_context *ctx; | |
1109 | int ret; | |
1110 | ||
1111 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1112 | return -EFAULT; | |
1113 | ||
1114 | ctx = ucma_get_ctx(file, cmd.id); | |
1115 | if (IS_ERR(ctx)) | |
1116 | return PTR_ERR(ctx); | |
1117 | ||
1118 | ret = rdma_disconnect(ctx->cm_id); | |
1119 | ucma_put_ctx(ctx); | |
1120 | return ret; | |
1121 | } | |
1122 | ||
1123 | static ssize_t ucma_init_qp_attr(struct ucma_file *file, | |
1124 | const char __user *inbuf, | |
1125 | int in_len, int out_len) | |
1126 | { | |
1127 | struct rdma_ucm_init_qp_attr cmd; | |
1128 | struct ib_uverbs_qp_attr resp; | |
1129 | struct ucma_context *ctx; | |
1130 | struct ib_qp_attr qp_attr; | |
1131 | int ret; | |
1132 | ||
1133 | if (out_len < sizeof(resp)) | |
1134 | return -ENOSPC; | |
1135 | ||
1136 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1137 | return -EFAULT; | |
1138 | ||
1139 | ctx = ucma_get_ctx(file, cmd.id); | |
1140 | if (IS_ERR(ctx)) | |
1141 | return PTR_ERR(ctx); | |
1142 | ||
1143 | resp.qp_attr_mask = 0; | |
1144 | memset(&qp_attr, 0, sizeof qp_attr); | |
1145 | qp_attr.qp_state = cmd.qp_state; | |
1146 | ret = rdma_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask); | |
1147 | if (ret) | |
1148 | goto out; | |
1149 | ||
1150 | ib_copy_qp_attr_to_user(&resp, &qp_attr); | |
1151 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
1152 | &resp, sizeof(resp))) | |
1153 | ret = -EFAULT; | |
1154 | ||
1155 | out: | |
1156 | ucma_put_ctx(ctx); | |
1157 | return ret; | |
1158 | } | |
1159 | ||
7ce86409 SH |
1160 | static int ucma_set_option_id(struct ucma_context *ctx, int optname, |
1161 | void *optval, size_t optlen) | |
1162 | { | |
1163 | int ret = 0; | |
1164 | ||
1165 | switch (optname) { | |
1166 | case RDMA_OPTION_ID_TOS: | |
1167 | if (optlen != sizeof(u8)) { | |
1168 | ret = -EINVAL; | |
1169 | break; | |
1170 | } | |
1171 | rdma_set_service_type(ctx->cm_id, *((u8 *) optval)); | |
1172 | break; | |
a9bb7912 HS |
1173 | case RDMA_OPTION_ID_REUSEADDR: |
1174 | if (optlen != sizeof(int)) { | |
1175 | ret = -EINVAL; | |
1176 | break; | |
1177 | } | |
1178 | ret = rdma_set_reuseaddr(ctx->cm_id, *((int *) optval) ? 1 : 0); | |
1179 | break; | |
68602120 SH |
1180 | case RDMA_OPTION_ID_AFONLY: |
1181 | if (optlen != sizeof(int)) { | |
1182 | ret = -EINVAL; | |
1183 | break; | |
1184 | } | |
1185 | ret = rdma_set_afonly(ctx->cm_id, *((int *) optval) ? 1 : 0); | |
1186 | break; | |
7ce86409 SH |
1187 | default: |
1188 | ret = -ENOSYS; | |
1189 | } | |
1190 | ||
1191 | return ret; | |
1192 | } | |
1193 | ||
a7ca1f00 SH |
1194 | static int ucma_set_ib_path(struct ucma_context *ctx, |
1195 | struct ib_path_rec_data *path_data, size_t optlen) | |
1196 | { | |
1197 | struct ib_sa_path_rec sa_path; | |
1198 | struct rdma_cm_event event; | |
1199 | int ret; | |
1200 | ||
1201 | if (optlen % sizeof(*path_data)) | |
1202 | return -EINVAL; | |
1203 | ||
1204 | for (; optlen; optlen -= sizeof(*path_data), path_data++) { | |
1205 | if (path_data->flags == (IB_PATH_GMP | IB_PATH_PRIMARY | | |
1206 | IB_PATH_BIDIRECTIONAL)) | |
1207 | break; | |
1208 | } | |
1209 | ||
1210 | if (!optlen) | |
1211 | return -EINVAL; | |
1212 | ||
c2be9dc0 IN |
1213 | memset(&sa_path, 0, sizeof(sa_path)); |
1214 | sa_path.vlan_id = 0xffff; | |
1215 | ||
a7ca1f00 SH |
1216 | ib_sa_unpack_path(path_data->path_rec, &sa_path); |
1217 | ret = rdma_set_ib_paths(ctx->cm_id, &sa_path, 1); | |
1218 | if (ret) | |
1219 | return ret; | |
1220 | ||
1221 | memset(&event, 0, sizeof event); | |
1222 | event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; | |
1223 | return ucma_event_handler(ctx->cm_id, &event); | |
1224 | } | |
1225 | ||
1226 | static int ucma_set_option_ib(struct ucma_context *ctx, int optname, | |
1227 | void *optval, size_t optlen) | |
1228 | { | |
1229 | int ret; | |
1230 | ||
1231 | switch (optname) { | |
1232 | case RDMA_OPTION_IB_PATH: | |
1233 | ret = ucma_set_ib_path(ctx, optval, optlen); | |
1234 | break; | |
1235 | default: | |
1236 | ret = -ENOSYS; | |
1237 | } | |
1238 | ||
1239 | return ret; | |
1240 | } | |
1241 | ||
7ce86409 SH |
1242 | static int ucma_set_option_level(struct ucma_context *ctx, int level, |
1243 | int optname, void *optval, size_t optlen) | |
1244 | { | |
1245 | int ret; | |
1246 | ||
1247 | switch (level) { | |
1248 | case RDMA_OPTION_ID: | |
1249 | ret = ucma_set_option_id(ctx, optname, optval, optlen); | |
1250 | break; | |
a7ca1f00 SH |
1251 | case RDMA_OPTION_IB: |
1252 | ret = ucma_set_option_ib(ctx, optname, optval, optlen); | |
1253 | break; | |
7ce86409 SH |
1254 | default: |
1255 | ret = -ENOSYS; | |
1256 | } | |
1257 | ||
1258 | return ret; | |
1259 | } | |
1260 | ||
1261 | static ssize_t ucma_set_option(struct ucma_file *file, const char __user *inbuf, | |
1262 | int in_len, int out_len) | |
1263 | { | |
1264 | struct rdma_ucm_set_option cmd; | |
1265 | struct ucma_context *ctx; | |
1266 | void *optval; | |
1267 | int ret; | |
1268 | ||
1269 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1270 | return -EFAULT; | |
1271 | ||
1272 | ctx = ucma_get_ctx(file, cmd.id); | |
1273 | if (IS_ERR(ctx)) | |
1274 | return PTR_ERR(ctx); | |
1275 | ||
0764c76e RD |
1276 | optval = memdup_user((void __user *) (unsigned long) cmd.optval, |
1277 | cmd.optlen); | |
1278 | if (IS_ERR(optval)) { | |
1279 | ret = PTR_ERR(optval); | |
1280 | goto out; | |
7ce86409 SH |
1281 | } |
1282 | ||
1283 | ret = ucma_set_option_level(ctx, cmd.level, cmd.optname, optval, | |
1284 | cmd.optlen); | |
7ce86409 | 1285 | kfree(optval); |
0764c76e RD |
1286 | |
1287 | out: | |
7ce86409 SH |
1288 | ucma_put_ctx(ctx); |
1289 | return ret; | |
1290 | } | |
1291 | ||
75216638 SH |
1292 | static ssize_t ucma_notify(struct ucma_file *file, const char __user *inbuf, |
1293 | int in_len, int out_len) | |
1294 | { | |
1295 | struct rdma_ucm_notify cmd; | |
1296 | struct ucma_context *ctx; | |
1297 | int ret; | |
1298 | ||
1299 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1300 | return -EFAULT; | |
1301 | ||
1302 | ctx = ucma_get_ctx(file, cmd.id); | |
1303 | if (IS_ERR(ctx)) | |
1304 | return PTR_ERR(ctx); | |
1305 | ||
1306 | ret = rdma_notify(ctx->cm_id, (enum ib_event_type) cmd.event); | |
1307 | ucma_put_ctx(ctx); | |
1308 | return ret; | |
1309 | } | |
1310 | ||
5bc2b7b3 SH |
1311 | static ssize_t ucma_process_join(struct ucma_file *file, |
1312 | struct rdma_ucm_join_mcast *cmd, int out_len) | |
c8f6a362 | 1313 | { |
c8f6a362 SH |
1314 | struct rdma_ucm_create_id_resp resp; |
1315 | struct ucma_context *ctx; | |
1316 | struct ucma_multicast *mc; | |
5bc2b7b3 | 1317 | struct sockaddr *addr; |
c8f6a362 SH |
1318 | int ret; |
1319 | ||
1320 | if (out_len < sizeof(resp)) | |
1321 | return -ENOSPC; | |
1322 | ||
5bc2b7b3 SH |
1323 | addr = (struct sockaddr *) &cmd->addr; |
1324 | if (cmd->reserved || !cmd->addr_size || (cmd->addr_size != rdma_addr_size(addr))) | |
1325 | return -EINVAL; | |
c8f6a362 | 1326 | |
5bc2b7b3 | 1327 | ctx = ucma_get_ctx(file, cmd->id); |
c8f6a362 SH |
1328 | if (IS_ERR(ctx)) |
1329 | return PTR_ERR(ctx); | |
1330 | ||
1331 | mutex_lock(&file->mut); | |
1332 | mc = ucma_alloc_multicast(ctx); | |
6aea938f JB |
1333 | if (!mc) { |
1334 | ret = -ENOMEM; | |
c8f6a362 SH |
1335 | goto err1; |
1336 | } | |
1337 | ||
5bc2b7b3 SH |
1338 | mc->uid = cmd->uid; |
1339 | memcpy(&mc->addr, addr, cmd->addr_size); | |
3f446754 | 1340 | ret = rdma_join_multicast(ctx->cm_id, (struct sockaddr *) &mc->addr, mc); |
c8f6a362 SH |
1341 | if (ret) |
1342 | goto err2; | |
1343 | ||
1344 | resp.id = mc->id; | |
5bc2b7b3 | 1345 | if (copy_to_user((void __user *)(unsigned long) cmd->response, |
c8f6a362 SH |
1346 | &resp, sizeof(resp))) { |
1347 | ret = -EFAULT; | |
1348 | goto err3; | |
1349 | } | |
1350 | ||
1351 | mutex_unlock(&file->mut); | |
1352 | ucma_put_ctx(ctx); | |
1353 | return 0; | |
1354 | ||
1355 | err3: | |
3f446754 | 1356 | rdma_leave_multicast(ctx->cm_id, (struct sockaddr *) &mc->addr); |
c8f6a362 SH |
1357 | ucma_cleanup_mc_events(mc); |
1358 | err2: | |
1359 | mutex_lock(&mut); | |
1360 | idr_remove(&multicast_idr, mc->id); | |
1361 | mutex_unlock(&mut); | |
1362 | list_del(&mc->list); | |
1363 | kfree(mc); | |
1364 | err1: | |
1365 | mutex_unlock(&file->mut); | |
1366 | ucma_put_ctx(ctx); | |
1367 | return ret; | |
1368 | } | |
1369 | ||
5bc2b7b3 SH |
1370 | static ssize_t ucma_join_ip_multicast(struct ucma_file *file, |
1371 | const char __user *inbuf, | |
1372 | int in_len, int out_len) | |
1373 | { | |
1374 | struct rdma_ucm_join_ip_mcast cmd; | |
1375 | struct rdma_ucm_join_mcast join_cmd; | |
1376 | ||
1377 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1378 | return -EFAULT; | |
1379 | ||
1380 | join_cmd.response = cmd.response; | |
1381 | join_cmd.uid = cmd.uid; | |
1382 | join_cmd.id = cmd.id; | |
1383 | join_cmd.addr_size = rdma_addr_size((struct sockaddr *) &cmd.addr); | |
1384 | join_cmd.reserved = 0; | |
1385 | memcpy(&join_cmd.addr, &cmd.addr, join_cmd.addr_size); | |
1386 | ||
1387 | return ucma_process_join(file, &join_cmd, out_len); | |
1388 | } | |
1389 | ||
1390 | static ssize_t ucma_join_multicast(struct ucma_file *file, | |
1391 | const char __user *inbuf, | |
1392 | int in_len, int out_len) | |
1393 | { | |
1394 | struct rdma_ucm_join_mcast cmd; | |
1395 | ||
1396 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1397 | return -EFAULT; | |
1398 | ||
1399 | return ucma_process_join(file, &cmd, out_len); | |
1400 | } | |
1401 | ||
c8f6a362 SH |
1402 | static ssize_t ucma_leave_multicast(struct ucma_file *file, |
1403 | const char __user *inbuf, | |
1404 | int in_len, int out_len) | |
1405 | { | |
1406 | struct rdma_ucm_destroy_id cmd; | |
1407 | struct rdma_ucm_destroy_id_resp resp; | |
1408 | struct ucma_multicast *mc; | |
1409 | int ret = 0; | |
1410 | ||
1411 | if (out_len < sizeof(resp)) | |
1412 | return -ENOSPC; | |
1413 | ||
1414 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1415 | return -EFAULT; | |
1416 | ||
1417 | mutex_lock(&mut); | |
1418 | mc = idr_find(&multicast_idr, cmd.id); | |
1419 | if (!mc) | |
1420 | mc = ERR_PTR(-ENOENT); | |
1421 | else if (mc->ctx->file != file) | |
1422 | mc = ERR_PTR(-EINVAL); | |
7e967fd0 JG |
1423 | else if (!atomic_inc_not_zero(&mc->ctx->ref)) |
1424 | mc = ERR_PTR(-ENXIO); | |
1425 | else | |
c8f6a362 | 1426 | idr_remove(&multicast_idr, mc->id); |
c8f6a362 SH |
1427 | mutex_unlock(&mut); |
1428 | ||
1429 | if (IS_ERR(mc)) { | |
1430 | ret = PTR_ERR(mc); | |
1431 | goto out; | |
1432 | } | |
1433 | ||
3f446754 | 1434 | rdma_leave_multicast(mc->ctx->cm_id, (struct sockaddr *) &mc->addr); |
c8f6a362 SH |
1435 | mutex_lock(&mc->ctx->file->mut); |
1436 | ucma_cleanup_mc_events(mc); | |
1437 | list_del(&mc->list); | |
1438 | mutex_unlock(&mc->ctx->file->mut); | |
1439 | ||
1440 | ucma_put_ctx(mc->ctx); | |
1441 | resp.events_reported = mc->events_reported; | |
1442 | kfree(mc); | |
1443 | ||
1444 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
1445 | &resp, sizeof(resp))) | |
1446 | ret = -EFAULT; | |
1447 | out: | |
1448 | return ret; | |
1449 | } | |
1450 | ||
88314e4d SH |
1451 | static void ucma_lock_files(struct ucma_file *file1, struct ucma_file *file2) |
1452 | { | |
1453 | /* Acquire mutex's based on pointer comparison to prevent deadlock. */ | |
1454 | if (file1 < file2) { | |
1455 | mutex_lock(&file1->mut); | |
31b57b87 | 1456 | mutex_lock_nested(&file2->mut, SINGLE_DEPTH_NESTING); |
88314e4d SH |
1457 | } else { |
1458 | mutex_lock(&file2->mut); | |
31b57b87 | 1459 | mutex_lock_nested(&file1->mut, SINGLE_DEPTH_NESTING); |
88314e4d SH |
1460 | } |
1461 | } | |
1462 | ||
1463 | static void ucma_unlock_files(struct ucma_file *file1, struct ucma_file *file2) | |
1464 | { | |
1465 | if (file1 < file2) { | |
1466 | mutex_unlock(&file2->mut); | |
1467 | mutex_unlock(&file1->mut); | |
1468 | } else { | |
1469 | mutex_unlock(&file1->mut); | |
1470 | mutex_unlock(&file2->mut); | |
1471 | } | |
1472 | } | |
1473 | ||
1474 | static void ucma_move_events(struct ucma_context *ctx, struct ucma_file *file) | |
1475 | { | |
1476 | struct ucma_event *uevent, *tmp; | |
1477 | ||
1478 | list_for_each_entry_safe(uevent, tmp, &ctx->file->event_list, list) | |
1479 | if (uevent->ctx == ctx) | |
1480 | list_move_tail(&uevent->list, &file->event_list); | |
1481 | } | |
1482 | ||
1483 | static ssize_t ucma_migrate_id(struct ucma_file *new_file, | |
1484 | const char __user *inbuf, | |
1485 | int in_len, int out_len) | |
1486 | { | |
1487 | struct rdma_ucm_migrate_id cmd; | |
1488 | struct rdma_ucm_migrate_resp resp; | |
1489 | struct ucma_context *ctx; | |
2903ff01 | 1490 | struct fd f; |
88314e4d SH |
1491 | struct ucma_file *cur_file; |
1492 | int ret = 0; | |
1493 | ||
1494 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1495 | return -EFAULT; | |
1496 | ||
1497 | /* Get current fd to protect against it being closed */ | |
2903ff01 AV |
1498 | f = fdget(cmd.fd); |
1499 | if (!f.file) | |
88314e4d SH |
1500 | return -ENOENT; |
1501 | ||
1502 | /* Validate current fd and prevent destruction of id. */ | |
2903ff01 | 1503 | ctx = ucma_get_ctx(f.file->private_data, cmd.id); |
88314e4d SH |
1504 | if (IS_ERR(ctx)) { |
1505 | ret = PTR_ERR(ctx); | |
1506 | goto file_put; | |
1507 | } | |
1508 | ||
1509 | cur_file = ctx->file; | |
1510 | if (cur_file == new_file) { | |
1511 | resp.events_reported = ctx->events_reported; | |
1512 | goto response; | |
1513 | } | |
1514 | ||
1515 | /* | |
1516 | * Migrate events between fd's, maintaining order, and avoiding new | |
1517 | * events being added before existing events. | |
1518 | */ | |
1519 | ucma_lock_files(cur_file, new_file); | |
1520 | mutex_lock(&mut); | |
1521 | ||
1522 | list_move_tail(&ctx->list, &new_file->ctx_list); | |
1523 | ucma_move_events(ctx, new_file); | |
1524 | ctx->file = new_file; | |
1525 | resp.events_reported = ctx->events_reported; | |
1526 | ||
1527 | mutex_unlock(&mut); | |
1528 | ucma_unlock_files(cur_file, new_file); | |
1529 | ||
1530 | response: | |
1531 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
1532 | &resp, sizeof(resp))) | |
1533 | ret = -EFAULT; | |
1534 | ||
1535 | ucma_put_ctx(ctx); | |
1536 | file_put: | |
2903ff01 | 1537 | fdput(f); |
88314e4d SH |
1538 | return ret; |
1539 | } | |
1540 | ||
75216638 SH |
1541 | static ssize_t (*ucma_cmd_table[])(struct ucma_file *file, |
1542 | const char __user *inbuf, | |
1543 | int in_len, int out_len) = { | |
05ad9457 SH |
1544 | [RDMA_USER_CM_CMD_CREATE_ID] = ucma_create_id, |
1545 | [RDMA_USER_CM_CMD_DESTROY_ID] = ucma_destroy_id, | |
1546 | [RDMA_USER_CM_CMD_BIND_IP] = ucma_bind_ip, | |
1547 | [RDMA_USER_CM_CMD_RESOLVE_IP] = ucma_resolve_ip, | |
1548 | [RDMA_USER_CM_CMD_RESOLVE_ROUTE] = ucma_resolve_route, | |
1549 | [RDMA_USER_CM_CMD_QUERY_ROUTE] = ucma_query_route, | |
1550 | [RDMA_USER_CM_CMD_CONNECT] = ucma_connect, | |
1551 | [RDMA_USER_CM_CMD_LISTEN] = ucma_listen, | |
1552 | [RDMA_USER_CM_CMD_ACCEPT] = ucma_accept, | |
1553 | [RDMA_USER_CM_CMD_REJECT] = ucma_reject, | |
1554 | [RDMA_USER_CM_CMD_DISCONNECT] = ucma_disconnect, | |
1555 | [RDMA_USER_CM_CMD_INIT_QP_ATTR] = ucma_init_qp_attr, | |
1556 | [RDMA_USER_CM_CMD_GET_EVENT] = ucma_get_event, | |
1557 | [RDMA_USER_CM_CMD_GET_OPTION] = NULL, | |
1558 | [RDMA_USER_CM_CMD_SET_OPTION] = ucma_set_option, | |
1559 | [RDMA_USER_CM_CMD_NOTIFY] = ucma_notify, | |
1560 | [RDMA_USER_CM_CMD_JOIN_IP_MCAST] = ucma_join_ip_multicast, | |
1561 | [RDMA_USER_CM_CMD_LEAVE_MCAST] = ucma_leave_multicast, | |
1562 | [RDMA_USER_CM_CMD_MIGRATE_ID] = ucma_migrate_id, | |
eebe4c3a | 1563 | [RDMA_USER_CM_CMD_QUERY] = ucma_query, |
209cf2a7 | 1564 | [RDMA_USER_CM_CMD_BIND] = ucma_bind, |
5bc2b7b3 SH |
1565 | [RDMA_USER_CM_CMD_RESOLVE_ADDR] = ucma_resolve_addr, |
1566 | [RDMA_USER_CM_CMD_JOIN_MCAST] = ucma_join_multicast | |
75216638 SH |
1567 | }; |
1568 | ||
1569 | static ssize_t ucma_write(struct file *filp, const char __user *buf, | |
1570 | size_t len, loff_t *pos) | |
1571 | { | |
1572 | struct ucma_file *file = filp->private_data; | |
1573 | struct rdma_ucm_cmd_hdr hdr; | |
1574 | ssize_t ret; | |
1575 | ||
1576 | if (len < sizeof(hdr)) | |
1577 | return -EINVAL; | |
1578 | ||
1579 | if (copy_from_user(&hdr, buf, sizeof(hdr))) | |
1580 | return -EFAULT; | |
1581 | ||
caf6e3f2 | 1582 | if (hdr.cmd >= ARRAY_SIZE(ucma_cmd_table)) |
75216638 SH |
1583 | return -EINVAL; |
1584 | ||
1585 | if (hdr.in + sizeof(hdr) > len) | |
1586 | return -EINVAL; | |
1587 | ||
1588 | if (!ucma_cmd_table[hdr.cmd]) | |
1589 | return -ENOSYS; | |
1590 | ||
1591 | ret = ucma_cmd_table[hdr.cmd](file, buf + sizeof(hdr), hdr.in, hdr.out); | |
1592 | if (!ret) | |
1593 | ret = len; | |
1594 | ||
1595 | return ret; | |
1596 | } | |
1597 | ||
1598 | static unsigned int ucma_poll(struct file *filp, struct poll_table_struct *wait) | |
1599 | { | |
1600 | struct ucma_file *file = filp->private_data; | |
1601 | unsigned int mask = 0; | |
1602 | ||
1603 | poll_wait(filp, &file->poll_wait, wait); | |
1604 | ||
1605 | if (!list_empty(&file->event_list)) | |
1606 | mask = POLLIN | POLLRDNORM; | |
1607 | ||
1608 | return mask; | |
1609 | } | |
1610 | ||
f7a6117e RD |
1611 | /* |
1612 | * ucma_open() does not need the BKL: | |
1613 | * | |
1614 | * - no global state is referred to; | |
1615 | * - there is no ioctl method to race against; | |
1616 | * - no further module initialization is required for open to work | |
1617 | * after the device is registered. | |
1618 | */ | |
75216638 SH |
1619 | static int ucma_open(struct inode *inode, struct file *filp) |
1620 | { | |
1621 | struct ucma_file *file; | |
1622 | ||
1623 | file = kmalloc(sizeof *file, GFP_KERNEL); | |
1624 | if (!file) | |
1625 | return -ENOMEM; | |
1626 | ||
1627 | INIT_LIST_HEAD(&file->event_list); | |
1628 | INIT_LIST_HEAD(&file->ctx_list); | |
1629 | init_waitqueue_head(&file->poll_wait); | |
1630 | mutex_init(&file->mut); | |
e1c30298 | 1631 | file->close_wq = create_singlethread_workqueue("ucma_close_id"); |
75216638 SH |
1632 | |
1633 | filp->private_data = file; | |
1634 | file->filp = filp; | |
bc1db9af RD |
1635 | |
1636 | return nonseekable_open(inode, filp); | |
75216638 SH |
1637 | } |
1638 | ||
1639 | static int ucma_close(struct inode *inode, struct file *filp) | |
1640 | { | |
1641 | struct ucma_file *file = filp->private_data; | |
1642 | struct ucma_context *ctx, *tmp; | |
1643 | ||
1644 | mutex_lock(&file->mut); | |
1645 | list_for_each_entry_safe(ctx, tmp, &file->ctx_list, list) { | |
e1c30298 | 1646 | ctx->destroying = 1; |
75216638 SH |
1647 | mutex_unlock(&file->mut); |
1648 | ||
1649 | mutex_lock(&mut); | |
1650 | idr_remove(&ctx_idr, ctx->id); | |
1651 | mutex_unlock(&mut); | |
1652 | ||
e1c30298 YH |
1653 | flush_workqueue(file->close_wq); |
1654 | /* At that step once ctx was marked as destroying and workqueue | |
1655 | * was flushed we are safe from any inflights handlers that | |
1656 | * might put other closing task. | |
1657 | */ | |
1658 | mutex_lock(&mut); | |
1659 | if (!ctx->closing) { | |
1660 | mutex_unlock(&mut); | |
1661 | /* rdma_destroy_id ensures that no event handlers are | |
1662 | * inflight for that id before releasing it. | |
1663 | */ | |
1664 | rdma_destroy_id(ctx->cm_id); | |
1665 | } else { | |
1666 | mutex_unlock(&mut); | |
1667 | } | |
1668 | ||
75216638 SH |
1669 | ucma_free_ctx(ctx); |
1670 | mutex_lock(&file->mut); | |
1671 | } | |
1672 | mutex_unlock(&file->mut); | |
e1c30298 | 1673 | destroy_workqueue(file->close_wq); |
75216638 SH |
1674 | kfree(file); |
1675 | return 0; | |
1676 | } | |
1677 | ||
2b8693c0 | 1678 | static const struct file_operations ucma_fops = { |
75216638 SH |
1679 | .owner = THIS_MODULE, |
1680 | .open = ucma_open, | |
1681 | .release = ucma_close, | |
1682 | .write = ucma_write, | |
1683 | .poll = ucma_poll, | |
bc1db9af | 1684 | .llseek = no_llseek, |
75216638 SH |
1685 | }; |
1686 | ||
1687 | static struct miscdevice ucma_misc = { | |
04ea2f81 RD |
1688 | .minor = MISC_DYNAMIC_MINOR, |
1689 | .name = "rdma_cm", | |
1690 | .nodename = "infiniband/rdma_cm", | |
1691 | .mode = 0666, | |
1692 | .fops = &ucma_fops, | |
75216638 SH |
1693 | }; |
1694 | ||
1695 | static ssize_t show_abi_version(struct device *dev, | |
1696 | struct device_attribute *attr, | |
1697 | char *buf) | |
1698 | { | |
1699 | return sprintf(buf, "%d\n", RDMA_USER_CM_ABI_VERSION); | |
1700 | } | |
1701 | static DEVICE_ATTR(abi_version, S_IRUGO, show_abi_version, NULL); | |
1702 | ||
1703 | static int __init ucma_init(void) | |
1704 | { | |
1705 | int ret; | |
1706 | ||
1707 | ret = misc_register(&ucma_misc); | |
1708 | if (ret) | |
1709 | return ret; | |
1710 | ||
1711 | ret = device_create_file(ucma_misc.this_device, &dev_attr_abi_version); | |
1712 | if (ret) { | |
1713 | printk(KERN_ERR "rdma_ucm: couldn't create abi_version attr\n"); | |
97cb7e40 SW |
1714 | goto err1; |
1715 | } | |
1716 | ||
ec8f23ce | 1717 | ucma_ctl_table_hdr = register_net_sysctl(&init_net, "net/rdma_ucm", ucma_ctl_table); |
97cb7e40 SW |
1718 | if (!ucma_ctl_table_hdr) { |
1719 | printk(KERN_ERR "rdma_ucm: couldn't register sysctl paths\n"); | |
1720 | ret = -ENOMEM; | |
1721 | goto err2; | |
75216638 SH |
1722 | } |
1723 | return 0; | |
97cb7e40 SW |
1724 | err2: |
1725 | device_remove_file(ucma_misc.this_device, &dev_attr_abi_version); | |
1726 | err1: | |
75216638 SH |
1727 | misc_deregister(&ucma_misc); |
1728 | return ret; | |
1729 | } | |
1730 | ||
1731 | static void __exit ucma_cleanup(void) | |
1732 | { | |
5dd3df10 | 1733 | unregister_net_sysctl_table(ucma_ctl_table_hdr); |
75216638 SH |
1734 | device_remove_file(ucma_misc.this_device, &dev_attr_abi_version); |
1735 | misc_deregister(&ucma_misc); | |
1736 | idr_destroy(&ctx_idr); | |
45d25420 | 1737 | idr_destroy(&multicast_idr); |
75216638 SH |
1738 | } |
1739 | ||
1740 | module_init(ucma_init); | |
1741 | module_exit(ucma_cleanup); |