]>
Commit | Line | Data |
---|---|---|
75216638 SH |
1 | /* |
2 | * Copyright (c) 2005-2006 Intel Corporation. All rights reserved. | |
3 | * | |
4 | * This software is available to you under a choice of one of two | |
5 | * licenses. You may choose to be licensed under the terms of the GNU | |
6 | * General Public License (GPL) Version 2, available from the file | |
7 | * COPYING in the main directory of this source tree, or the | |
8 | * OpenIB.org BSD license below: | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or | |
11 | * without modification, are permitted provided that the following | |
12 | * conditions are met: | |
13 | * | |
14 | * - Redistributions of source code must retain the above | |
15 | * copyright notice, this list of conditions and the following | |
16 | * disclaimer. | |
17 | * | |
18 | * - Redistributions in binary form must reproduce the above | |
19 | * copyright notice, this list of conditions and the following | |
20 | * disclaimer in the documentation and/or other materials | |
21 | * provided with the distribution. | |
22 | * | |
23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
30 | * SOFTWARE. | |
31 | */ | |
32 | ||
33 | #include <linux/completion.h> | |
88314e4d | 34 | #include <linux/file.h> |
75216638 SH |
35 | #include <linux/mutex.h> |
36 | #include <linux/poll.h> | |
d43c36dc | 37 | #include <linux/sched.h> |
75216638 SH |
38 | #include <linux/idr.h> |
39 | #include <linux/in.h> | |
40 | #include <linux/in6.h> | |
41 | #include <linux/miscdevice.h> | |
5a0e3ad6 | 42 | #include <linux/slab.h> |
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; | |
ab15c95a | 109 | u8 join_state; |
c8f6a362 | 110 | struct list_head list; |
3f446754 | 111 | struct sockaddr_storage addr; |
75216638 SH |
112 | }; |
113 | ||
114 | struct ucma_event { | |
115 | struct ucma_context *ctx; | |
c8f6a362 | 116 | struct ucma_multicast *mc; |
75216638 SH |
117 | struct list_head list; |
118 | struct rdma_cm_id *cm_id; | |
119 | struct rdma_ucm_event_resp resp; | |
e1c30298 | 120 | struct work_struct close_work; |
75216638 SH |
121 | }; |
122 | ||
123 | static DEFINE_MUTEX(mut); | |
124 | static DEFINE_IDR(ctx_idr); | |
c8f6a362 | 125 | static DEFINE_IDR(multicast_idr); |
75216638 SH |
126 | |
127 | static inline struct ucma_context *_ucma_find_context(int id, | |
128 | struct ucma_file *file) | |
129 | { | |
130 | struct ucma_context *ctx; | |
131 | ||
132 | ctx = idr_find(&ctx_idr, id); | |
133 | if (!ctx) | |
134 | ctx = ERR_PTR(-ENOENT); | |
135 | else if (ctx->file != file) | |
136 | ctx = ERR_PTR(-EINVAL); | |
137 | return ctx; | |
138 | } | |
139 | ||
140 | static struct ucma_context *ucma_get_ctx(struct ucma_file *file, int id) | |
141 | { | |
142 | struct ucma_context *ctx; | |
143 | ||
144 | mutex_lock(&mut); | |
145 | ctx = _ucma_find_context(id, file); | |
e1c30298 YH |
146 | if (!IS_ERR(ctx)) { |
147 | if (ctx->closing) | |
148 | ctx = ERR_PTR(-EIO); | |
149 | else | |
150 | atomic_inc(&ctx->ref); | |
151 | } | |
75216638 SH |
152 | mutex_unlock(&mut); |
153 | return ctx; | |
154 | } | |
155 | ||
156 | static void ucma_put_ctx(struct ucma_context *ctx) | |
157 | { | |
158 | if (atomic_dec_and_test(&ctx->ref)) | |
159 | complete(&ctx->comp); | |
160 | } | |
161 | ||
e1c30298 YH |
162 | static void ucma_close_event_id(struct work_struct *work) |
163 | { | |
164 | struct ucma_event *uevent_close = container_of(work, struct ucma_event, close_work); | |
165 | ||
166 | rdma_destroy_id(uevent_close->cm_id); | |
167 | kfree(uevent_close); | |
168 | } | |
169 | ||
170 | static void ucma_close_id(struct work_struct *work) | |
171 | { | |
172 | struct ucma_context *ctx = container_of(work, struct ucma_context, close_work); | |
173 | ||
174 | /* once all inflight tasks are finished, we close all underlying | |
175 | * resources. The context is still alive till its explicit destryoing | |
176 | * by its creator. | |
177 | */ | |
178 | ucma_put_ctx(ctx); | |
179 | wait_for_completion(&ctx->comp); | |
180 | /* No new events will be generated after destroying the id. */ | |
181 | rdma_destroy_id(ctx->cm_id); | |
182 | } | |
183 | ||
75216638 SH |
184 | static struct ucma_context *ucma_alloc_ctx(struct ucma_file *file) |
185 | { | |
186 | struct ucma_context *ctx; | |
75216638 SH |
187 | |
188 | ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); | |
189 | if (!ctx) | |
190 | return NULL; | |
191 | ||
e1c30298 | 192 | INIT_WORK(&ctx->close_work, ucma_close_id); |
75216638 SH |
193 | atomic_set(&ctx->ref, 1); |
194 | init_completion(&ctx->comp); | |
c8f6a362 | 195 | INIT_LIST_HEAD(&ctx->mc_list); |
75216638 SH |
196 | ctx->file = file; |
197 | ||
3b069c5d TH |
198 | mutex_lock(&mut); |
199 | ctx->id = idr_alloc(&ctx_idr, ctx, 0, 0, GFP_KERNEL); | |
200 | mutex_unlock(&mut); | |
201 | if (ctx->id < 0) | |
75216638 SH |
202 | goto error; |
203 | ||
204 | list_add_tail(&ctx->list, &file->ctx_list); | |
205 | return ctx; | |
206 | ||
207 | error: | |
208 | kfree(ctx); | |
209 | return NULL; | |
210 | } | |
211 | ||
c8f6a362 SH |
212 | static struct ucma_multicast* ucma_alloc_multicast(struct ucma_context *ctx) |
213 | { | |
214 | struct ucma_multicast *mc; | |
c8f6a362 SH |
215 | |
216 | mc = kzalloc(sizeof(*mc), GFP_KERNEL); | |
217 | if (!mc) | |
218 | return NULL; | |
219 | ||
3b069c5d TH |
220 | mutex_lock(&mut); |
221 | mc->id = idr_alloc(&multicast_idr, mc, 0, 0, GFP_KERNEL); | |
222 | mutex_unlock(&mut); | |
223 | if (mc->id < 0) | |
c8f6a362 SH |
224 | goto error; |
225 | ||
226 | mc->ctx = ctx; | |
227 | list_add_tail(&mc->list, &ctx->mc_list); | |
228 | return mc; | |
229 | ||
230 | error: | |
231 | kfree(mc); | |
232 | return NULL; | |
233 | } | |
234 | ||
75216638 SH |
235 | static void ucma_copy_conn_event(struct rdma_ucm_conn_param *dst, |
236 | struct rdma_conn_param *src) | |
237 | { | |
238 | if (src->private_data_len) | |
239 | memcpy(dst->private_data, src->private_data, | |
240 | src->private_data_len); | |
241 | dst->private_data_len = src->private_data_len; | |
242 | dst->responder_resources =src->responder_resources; | |
243 | dst->initiator_depth = src->initiator_depth; | |
244 | dst->flow_control = src->flow_control; | |
245 | dst->retry_count = src->retry_count; | |
246 | dst->rnr_retry_count = src->rnr_retry_count; | |
247 | dst->srq = src->srq; | |
248 | dst->qp_num = src->qp_num; | |
249 | } | |
250 | ||
d541e455 DC |
251 | static void ucma_copy_ud_event(struct ib_device *device, |
252 | struct rdma_ucm_ud_param *dst, | |
75216638 SH |
253 | struct rdma_ud_param *src) |
254 | { | |
255 | if (src->private_data_len) | |
256 | memcpy(dst->private_data, src->private_data, | |
257 | src->private_data_len); | |
258 | dst->private_data_len = src->private_data_len; | |
d541e455 | 259 | ib_copy_ah_attr_to_user(device, &dst->ah_attr, &src->ah_attr); |
75216638 SH |
260 | dst->qp_num = src->qp_num; |
261 | dst->qkey = src->qkey; | |
262 | } | |
263 | ||
264 | static void ucma_set_event_context(struct ucma_context *ctx, | |
265 | struct rdma_cm_event *event, | |
266 | struct ucma_event *uevent) | |
267 | { | |
268 | uevent->ctx = ctx; | |
c8f6a362 SH |
269 | switch (event->event) { |
270 | case RDMA_CM_EVENT_MULTICAST_JOIN: | |
271 | case RDMA_CM_EVENT_MULTICAST_ERROR: | |
272 | uevent->mc = (struct ucma_multicast *) | |
273 | event->param.ud.private_data; | |
274 | uevent->resp.uid = uevent->mc->uid; | |
275 | uevent->resp.id = uevent->mc->id; | |
276 | break; | |
277 | default: | |
278 | uevent->resp.uid = ctx->uid; | |
279 | uevent->resp.id = ctx->id; | |
280 | break; | |
281 | } | |
75216638 SH |
282 | } |
283 | ||
e1c30298 YH |
284 | /* Called with file->mut locked for the relevant context. */ |
285 | static void ucma_removal_event_handler(struct rdma_cm_id *cm_id) | |
286 | { | |
287 | struct ucma_context *ctx = cm_id->context; | |
288 | struct ucma_event *con_req_eve; | |
289 | int event_found = 0; | |
290 | ||
291 | if (ctx->destroying) | |
292 | return; | |
293 | ||
294 | /* only if context is pointing to cm_id that it owns it and can be | |
295 | * queued to be closed, otherwise that cm_id is an inflight one that | |
296 | * is part of that context event list pending to be detached and | |
297 | * reattached to its new context as part of ucma_get_event, | |
298 | * handled separately below. | |
299 | */ | |
300 | if (ctx->cm_id == cm_id) { | |
301 | mutex_lock(&mut); | |
302 | ctx->closing = 1; | |
303 | mutex_unlock(&mut); | |
304 | queue_work(ctx->file->close_wq, &ctx->close_work); | |
305 | return; | |
306 | } | |
307 | ||
308 | list_for_each_entry(con_req_eve, &ctx->file->event_list, list) { | |
309 | if (con_req_eve->cm_id == cm_id && | |
310 | con_req_eve->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) { | |
311 | list_del(&con_req_eve->list); | |
312 | INIT_WORK(&con_req_eve->close_work, ucma_close_event_id); | |
313 | queue_work(ctx->file->close_wq, &con_req_eve->close_work); | |
314 | event_found = 1; | |
315 | break; | |
316 | } | |
317 | } | |
318 | if (!event_found) | |
aba25a3e | 319 | pr_err("ucma_removal_event_handler: warning: connect request event wasn't found\n"); |
e1c30298 YH |
320 | } |
321 | ||
75216638 SH |
322 | static int ucma_event_handler(struct rdma_cm_id *cm_id, |
323 | struct rdma_cm_event *event) | |
324 | { | |
325 | struct ucma_event *uevent; | |
326 | struct ucma_context *ctx = cm_id->context; | |
327 | int ret = 0; | |
328 | ||
329 | uevent = kzalloc(sizeof(*uevent), GFP_KERNEL); | |
330 | if (!uevent) | |
331 | return event->event == RDMA_CM_EVENT_CONNECT_REQUEST; | |
332 | ||
418edaab | 333 | mutex_lock(&ctx->file->mut); |
75216638 SH |
334 | uevent->cm_id = cm_id; |
335 | ucma_set_event_context(ctx, event, uevent); | |
336 | uevent->resp.event = event->event; | |
337 | uevent->resp.status = event->status; | |
638ef7a6 | 338 | if (cm_id->qp_type == IB_QPT_UD) |
d541e455 DC |
339 | ucma_copy_ud_event(cm_id->device, &uevent->resp.param.ud, |
340 | &event->param.ud); | |
75216638 SH |
341 | else |
342 | ucma_copy_conn_event(&uevent->resp.param.conn, | |
343 | &event->param.conn); | |
344 | ||
75216638 SH |
345 | if (event->event == RDMA_CM_EVENT_CONNECT_REQUEST) { |
346 | if (!ctx->backlog) { | |
3492856e | 347 | ret = -ENOMEM; |
30a5ec98 | 348 | kfree(uevent); |
75216638 SH |
349 | goto out; |
350 | } | |
351 | ctx->backlog--; | |
c6b21824 | 352 | } else if (!ctx->uid || ctx->cm_id != cm_id) { |
0cefcf0b SH |
353 | /* |
354 | * We ignore events for new connections until userspace has set | |
355 | * their context. This can only happen if an error occurs on a | |
356 | * new connection before the user accepts it. This is okay, | |
e1c30298 YH |
357 | * since the accept will just fail later. However, we do need |
358 | * to release the underlying HW resources in case of a device | |
359 | * removal event. | |
0cefcf0b | 360 | */ |
e1c30298 YH |
361 | if (event->event == RDMA_CM_EVENT_DEVICE_REMOVAL) |
362 | ucma_removal_event_handler(cm_id); | |
363 | ||
0cefcf0b SH |
364 | kfree(uevent); |
365 | goto out; | |
75216638 | 366 | } |
0cefcf0b | 367 | |
75216638 SH |
368 | list_add_tail(&uevent->list, &ctx->file->event_list); |
369 | wake_up_interruptible(&ctx->file->poll_wait); | |
e1c30298 YH |
370 | if (event->event == RDMA_CM_EVENT_DEVICE_REMOVAL) |
371 | ucma_removal_event_handler(cm_id); | |
75216638 SH |
372 | out: |
373 | mutex_unlock(&ctx->file->mut); | |
374 | return ret; | |
375 | } | |
376 | ||
377 | static ssize_t ucma_get_event(struct ucma_file *file, const char __user *inbuf, | |
378 | int in_len, int out_len) | |
379 | { | |
380 | struct ucma_context *ctx; | |
381 | struct rdma_ucm_get_event cmd; | |
382 | struct ucma_event *uevent; | |
383 | int ret = 0; | |
75216638 SH |
384 | |
385 | if (out_len < sizeof uevent->resp) | |
386 | return -ENOSPC; | |
387 | ||
388 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
389 | return -EFAULT; | |
390 | ||
391 | mutex_lock(&file->mut); | |
392 | while (list_empty(&file->event_list)) { | |
d92f7644 | 393 | mutex_unlock(&file->mut); |
75216638 | 394 | |
d92f7644 SH |
395 | if (file->filp->f_flags & O_NONBLOCK) |
396 | return -EAGAIN; | |
397 | ||
398 | if (wait_event_interruptible(file->poll_wait, | |
399 | !list_empty(&file->event_list))) | |
400 | return -ERESTARTSYS; | |
75216638 | 401 | |
75216638 | 402 | mutex_lock(&file->mut); |
75216638 SH |
403 | } |
404 | ||
75216638 SH |
405 | uevent = list_entry(file->event_list.next, struct ucma_event, list); |
406 | ||
407 | if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) { | |
408 | ctx = ucma_alloc_ctx(file); | |
409 | if (!ctx) { | |
410 | ret = -ENOMEM; | |
411 | goto done; | |
412 | } | |
413 | uevent->ctx->backlog++; | |
414 | ctx->cm_id = uevent->cm_id; | |
415 | ctx->cm_id->context = ctx; | |
416 | uevent->resp.id = ctx->id; | |
417 | } | |
418 | ||
419 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
420 | &uevent->resp, sizeof uevent->resp)) { | |
421 | ret = -EFAULT; | |
422 | goto done; | |
423 | } | |
424 | ||
425 | list_del(&uevent->list); | |
426 | uevent->ctx->events_reported++; | |
c8f6a362 SH |
427 | if (uevent->mc) |
428 | uevent->mc->events_reported++; | |
75216638 SH |
429 | kfree(uevent); |
430 | done: | |
431 | mutex_unlock(&file->mut); | |
432 | return ret; | |
433 | } | |
434 | ||
b26f9b99 SH |
435 | static int ucma_get_qp_type(struct rdma_ucm_create_id *cmd, enum ib_qp_type *qp_type) |
436 | { | |
437 | switch (cmd->ps) { | |
438 | case RDMA_PS_TCP: | |
439 | *qp_type = IB_QPT_RC; | |
440 | return 0; | |
441 | case RDMA_PS_UDP: | |
442 | case RDMA_PS_IPOIB: | |
443 | *qp_type = IB_QPT_UD; | |
444 | return 0; | |
638ef7a6 SH |
445 | case RDMA_PS_IB: |
446 | *qp_type = cmd->qp_type; | |
447 | return 0; | |
b26f9b99 SH |
448 | default: |
449 | return -EINVAL; | |
450 | } | |
451 | } | |
452 | ||
453 | static ssize_t ucma_create_id(struct ucma_file *file, const char __user *inbuf, | |
454 | int in_len, int out_len) | |
75216638 SH |
455 | { |
456 | struct rdma_ucm_create_id cmd; | |
457 | struct rdma_ucm_create_id_resp resp; | |
458 | struct ucma_context *ctx; | |
b26f9b99 | 459 | enum ib_qp_type qp_type; |
75216638 SH |
460 | int ret; |
461 | ||
462 | if (out_len < sizeof(resp)) | |
463 | return -ENOSPC; | |
464 | ||
465 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
466 | return -EFAULT; | |
467 | ||
b26f9b99 SH |
468 | ret = ucma_get_qp_type(&cmd, &qp_type); |
469 | if (ret) | |
470 | return ret; | |
471 | ||
75216638 SH |
472 | mutex_lock(&file->mut); |
473 | ctx = ucma_alloc_ctx(file); | |
474 | mutex_unlock(&file->mut); | |
475 | if (!ctx) | |
476 | return -ENOMEM; | |
477 | ||
478 | ctx->uid = cmd.uid; | |
00313983 SW |
479 | ctx->cm_id = __rdma_create_id(current->nsproxy->net_ns, |
480 | ucma_event_handler, ctx, cmd.ps, qp_type, NULL); | |
75216638 SH |
481 | if (IS_ERR(ctx->cm_id)) { |
482 | ret = PTR_ERR(ctx->cm_id); | |
483 | goto err1; | |
484 | } | |
485 | ||
486 | resp.id = ctx->id; | |
487 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
488 | &resp, sizeof(resp))) { | |
489 | ret = -EFAULT; | |
490 | goto err2; | |
491 | } | |
492 | return 0; | |
493 | ||
494 | err2: | |
495 | rdma_destroy_id(ctx->cm_id); | |
496 | err1: | |
497 | mutex_lock(&mut); | |
498 | idr_remove(&ctx_idr, ctx->id); | |
499 | mutex_unlock(&mut); | |
500 | kfree(ctx); | |
501 | return ret; | |
502 | } | |
503 | ||
c8f6a362 SH |
504 | static void ucma_cleanup_multicast(struct ucma_context *ctx) |
505 | { | |
506 | struct ucma_multicast *mc, *tmp; | |
507 | ||
508 | mutex_lock(&mut); | |
509 | list_for_each_entry_safe(mc, tmp, &ctx->mc_list, list) { | |
510 | list_del(&mc->list); | |
511 | idr_remove(&multicast_idr, mc->id); | |
512 | kfree(mc); | |
513 | } | |
514 | mutex_unlock(&mut); | |
515 | } | |
516 | ||
c8f6a362 SH |
517 | static void ucma_cleanup_mc_events(struct ucma_multicast *mc) |
518 | { | |
519 | struct ucma_event *uevent, *tmp; | |
520 | ||
521 | list_for_each_entry_safe(uevent, tmp, &mc->ctx->file->event_list, list) { | |
522 | if (uevent->mc != mc) | |
523 | continue; | |
524 | ||
525 | list_del(&uevent->list); | |
526 | kfree(uevent); | |
527 | } | |
528 | } | |
529 | ||
186834b5 | 530 | /* |
e1c30298 YH |
531 | * ucma_free_ctx is called after the underlying rdma CM-ID is destroyed. At |
532 | * this point, no new events will be reported from the hardware. However, we | |
533 | * still need to cleanup the UCMA context for this ID. Specifically, there | |
534 | * might be events that have not yet been consumed by the user space software. | |
535 | * These might include pending connect requests which we have not completed | |
536 | * processing. We cannot call rdma_destroy_id while holding the lock of the | |
537 | * context (file->mut), as it might cause a deadlock. We therefore extract all | |
538 | * relevant events from the context pending events list while holding the | |
539 | * mutex. After that we release them as needed. | |
186834b5 | 540 | */ |
75216638 SH |
541 | static int ucma_free_ctx(struct ucma_context *ctx) |
542 | { | |
543 | int events_reported; | |
186834b5 HS |
544 | struct ucma_event *uevent, *tmp; |
545 | LIST_HEAD(list); | |
75216638 | 546 | |
75216638 | 547 | |
c8f6a362 SH |
548 | ucma_cleanup_multicast(ctx); |
549 | ||
75216638 SH |
550 | /* Cleanup events not yet reported to the user. */ |
551 | mutex_lock(&ctx->file->mut); | |
186834b5 HS |
552 | list_for_each_entry_safe(uevent, tmp, &ctx->file->event_list, list) { |
553 | if (uevent->ctx == ctx) | |
554 | list_move_tail(&uevent->list, &list); | |
555 | } | |
75216638 SH |
556 | list_del(&ctx->list); |
557 | mutex_unlock(&ctx->file->mut); | |
558 | ||
186834b5 HS |
559 | list_for_each_entry_safe(uevent, tmp, &list, list) { |
560 | list_del(&uevent->list); | |
561 | if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) | |
562 | rdma_destroy_id(uevent->cm_id); | |
563 | kfree(uevent); | |
564 | } | |
565 | ||
75216638 SH |
566 | events_reported = ctx->events_reported; |
567 | kfree(ctx); | |
568 | return events_reported; | |
569 | } | |
570 | ||
571 | static ssize_t ucma_destroy_id(struct ucma_file *file, const char __user *inbuf, | |
572 | int in_len, int out_len) | |
573 | { | |
574 | struct rdma_ucm_destroy_id cmd; | |
575 | struct rdma_ucm_destroy_id_resp resp; | |
576 | struct ucma_context *ctx; | |
577 | int ret = 0; | |
578 | ||
579 | if (out_len < sizeof(resp)) | |
580 | return -ENOSPC; | |
581 | ||
582 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
583 | return -EFAULT; | |
584 | ||
585 | mutex_lock(&mut); | |
586 | ctx = _ucma_find_context(cmd.id, file); | |
587 | if (!IS_ERR(ctx)) | |
588 | idr_remove(&ctx_idr, ctx->id); | |
589 | mutex_unlock(&mut); | |
590 | ||
591 | if (IS_ERR(ctx)) | |
592 | return PTR_ERR(ctx); | |
593 | ||
e1c30298 YH |
594 | mutex_lock(&ctx->file->mut); |
595 | ctx->destroying = 1; | |
596 | mutex_unlock(&ctx->file->mut); | |
597 | ||
598 | flush_workqueue(ctx->file->close_wq); | |
599 | /* At this point it's guaranteed that there is no inflight | |
600 | * closing task */ | |
601 | mutex_lock(&mut); | |
602 | if (!ctx->closing) { | |
603 | mutex_unlock(&mut); | |
604 | ucma_put_ctx(ctx); | |
605 | wait_for_completion(&ctx->comp); | |
606 | rdma_destroy_id(ctx->cm_id); | |
607 | } else { | |
608 | mutex_unlock(&mut); | |
609 | } | |
75216638 | 610 | |
e1c30298 | 611 | resp.events_reported = ucma_free_ctx(ctx); |
75216638 SH |
612 | if (copy_to_user((void __user *)(unsigned long)cmd.response, |
613 | &resp, sizeof(resp))) | |
614 | ret = -EFAULT; | |
615 | ||
616 | return ret; | |
617 | } | |
618 | ||
05ad9457 | 619 | static ssize_t ucma_bind_ip(struct ucma_file *file, const char __user *inbuf, |
75216638 SH |
620 | int in_len, int out_len) |
621 | { | |
05ad9457 | 622 | struct rdma_ucm_bind_ip cmd; |
75216638 SH |
623 | struct ucma_context *ctx; |
624 | int ret; | |
625 | ||
626 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
627 | return -EFAULT; | |
628 | ||
629 | ctx = ucma_get_ctx(file, cmd.id); | |
630 | if (IS_ERR(ctx)) | |
631 | return PTR_ERR(ctx); | |
632 | ||
633 | ret = rdma_bind_addr(ctx->cm_id, (struct sockaddr *) &cmd.addr); | |
634 | ucma_put_ctx(ctx); | |
635 | return ret; | |
636 | } | |
637 | ||
eebe4c3a SH |
638 | static ssize_t ucma_bind(struct ucma_file *file, const char __user *inbuf, |
639 | int in_len, int out_len) | |
640 | { | |
641 | struct rdma_ucm_bind cmd; | |
642 | struct sockaddr *addr; | |
643 | struct ucma_context *ctx; | |
644 | int ret; | |
645 | ||
646 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
647 | return -EFAULT; | |
648 | ||
649 | addr = (struct sockaddr *) &cmd.addr; | |
650 | if (cmd.reserved || !cmd.addr_size || (cmd.addr_size != rdma_addr_size(addr))) | |
651 | return -EINVAL; | |
652 | ||
653 | ctx = ucma_get_ctx(file, cmd.id); | |
654 | if (IS_ERR(ctx)) | |
655 | return PTR_ERR(ctx); | |
656 | ||
657 | ret = rdma_bind_addr(ctx->cm_id, addr); | |
658 | ucma_put_ctx(ctx); | |
659 | return ret; | |
660 | } | |
661 | ||
05ad9457 SH |
662 | static ssize_t ucma_resolve_ip(struct ucma_file *file, |
663 | const char __user *inbuf, | |
664 | int in_len, int out_len) | |
75216638 | 665 | { |
05ad9457 | 666 | struct rdma_ucm_resolve_ip cmd; |
75216638 SH |
667 | struct ucma_context *ctx; |
668 | int ret; | |
669 | ||
670 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
671 | return -EFAULT; | |
672 | ||
673 | ctx = ucma_get_ctx(file, cmd.id); | |
674 | if (IS_ERR(ctx)) | |
675 | return PTR_ERR(ctx); | |
676 | ||
677 | ret = rdma_resolve_addr(ctx->cm_id, (struct sockaddr *) &cmd.src_addr, | |
678 | (struct sockaddr *) &cmd.dst_addr, | |
679 | cmd.timeout_ms); | |
680 | ucma_put_ctx(ctx); | |
681 | return ret; | |
682 | } | |
683 | ||
209cf2a7 SH |
684 | static ssize_t ucma_resolve_addr(struct ucma_file *file, |
685 | const char __user *inbuf, | |
686 | int in_len, int out_len) | |
687 | { | |
688 | struct rdma_ucm_resolve_addr cmd; | |
689 | struct sockaddr *src, *dst; | |
690 | struct ucma_context *ctx; | |
691 | int ret; | |
692 | ||
693 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
694 | return -EFAULT; | |
695 | ||
696 | src = (struct sockaddr *) &cmd.src_addr; | |
697 | dst = (struct sockaddr *) &cmd.dst_addr; | |
698 | if (cmd.reserved || (cmd.src_size && (cmd.src_size != rdma_addr_size(src))) || | |
699 | !cmd.dst_size || (cmd.dst_size != rdma_addr_size(dst))) | |
700 | return -EINVAL; | |
701 | ||
702 | ctx = ucma_get_ctx(file, cmd.id); | |
703 | if (IS_ERR(ctx)) | |
704 | return PTR_ERR(ctx); | |
705 | ||
706 | ret = rdma_resolve_addr(ctx->cm_id, src, dst, cmd.timeout_ms); | |
707 | ucma_put_ctx(ctx); | |
708 | return ret; | |
709 | } | |
710 | ||
75216638 SH |
711 | static ssize_t ucma_resolve_route(struct ucma_file *file, |
712 | const char __user *inbuf, | |
713 | int in_len, int out_len) | |
714 | { | |
715 | struct rdma_ucm_resolve_route cmd; | |
716 | struct ucma_context *ctx; | |
717 | int ret; | |
718 | ||
719 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
720 | return -EFAULT; | |
721 | ||
722 | ctx = ucma_get_ctx(file, cmd.id); | |
723 | if (IS_ERR(ctx)) | |
724 | return PTR_ERR(ctx); | |
725 | ||
726 | ret = rdma_resolve_route(ctx->cm_id, cmd.timeout_ms); | |
727 | ucma_put_ctx(ctx); | |
728 | return ret; | |
729 | } | |
730 | ||
731 | static void ucma_copy_ib_route(struct rdma_ucm_query_route_resp *resp, | |
732 | struct rdma_route *route) | |
733 | { | |
734 | struct rdma_dev_addr *dev_addr; | |
735 | ||
736 | resp->num_paths = route->num_paths; | |
737 | switch (route->num_paths) { | |
738 | case 0: | |
739 | dev_addr = &route->addr.dev_addr; | |
6f8372b6 SH |
740 | rdma_addr_get_dgid(dev_addr, |
741 | (union ib_gid *) &resp->ib_route[0].dgid); | |
742 | rdma_addr_get_sgid(dev_addr, | |
743 | (union ib_gid *) &resp->ib_route[0].sgid); | |
75216638 SH |
744 | resp->ib_route[0].pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); |
745 | break; | |
746 | case 2: | |
747 | ib_copy_path_rec_to_user(&resp->ib_route[1], | |
748 | &route->path_rec[1]); | |
749 | /* fall through */ | |
750 | case 1: | |
751 | ib_copy_path_rec_to_user(&resp->ib_route[0], | |
752 | &route->path_rec[0]); | |
753 | break; | |
754 | default: | |
755 | break; | |
756 | } | |
757 | } | |
758 | ||
3c86aa70 EC |
759 | static void ucma_copy_iboe_route(struct rdma_ucm_query_route_resp *resp, |
760 | struct rdma_route *route) | |
761 | { | |
3c86aa70 EC |
762 | |
763 | resp->num_paths = route->num_paths; | |
764 | switch (route->num_paths) { | |
765 | case 0: | |
7b85627b MS |
766 | rdma_ip2gid((struct sockaddr *)&route->addr.dst_addr, |
767 | (union ib_gid *)&resp->ib_route[0].dgid); | |
768 | rdma_ip2gid((struct sockaddr *)&route->addr.src_addr, | |
769 | (union ib_gid *)&resp->ib_route[0].sgid); | |
3c86aa70 EC |
770 | resp->ib_route[0].pkey = cpu_to_be16(0xffff); |
771 | break; | |
772 | case 2: | |
773 | ib_copy_path_rec_to_user(&resp->ib_route[1], | |
774 | &route->path_rec[1]); | |
775 | /* fall through */ | |
776 | case 1: | |
777 | ib_copy_path_rec_to_user(&resp->ib_route[0], | |
778 | &route->path_rec[0]); | |
779 | break; | |
780 | default: | |
781 | break; | |
782 | } | |
783 | } | |
784 | ||
e86f8b06 SW |
785 | static void ucma_copy_iw_route(struct rdma_ucm_query_route_resp *resp, |
786 | struct rdma_route *route) | |
787 | { | |
788 | struct rdma_dev_addr *dev_addr; | |
789 | ||
790 | dev_addr = &route->addr.dev_addr; | |
791 | rdma_addr_get_dgid(dev_addr, (union ib_gid *) &resp->ib_route[0].dgid); | |
792 | rdma_addr_get_sgid(dev_addr, (union ib_gid *) &resp->ib_route[0].sgid); | |
793 | } | |
794 | ||
75216638 SH |
795 | static ssize_t ucma_query_route(struct ucma_file *file, |
796 | const char __user *inbuf, | |
797 | int in_len, int out_len) | |
798 | { | |
ee7aed45 | 799 | struct rdma_ucm_query cmd; |
75216638 SH |
800 | struct rdma_ucm_query_route_resp resp; |
801 | struct ucma_context *ctx; | |
802 | struct sockaddr *addr; | |
803 | int ret = 0; | |
804 | ||
805 | if (out_len < sizeof(resp)) | |
806 | return -ENOSPC; | |
807 | ||
808 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
809 | return -EFAULT; | |
810 | ||
811 | ctx = ucma_get_ctx(file, cmd.id); | |
812 | if (IS_ERR(ctx)) | |
813 | return PTR_ERR(ctx); | |
814 | ||
815 | memset(&resp, 0, sizeof resp); | |
3f446754 | 816 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.src_addr; |
75216638 SH |
817 | memcpy(&resp.src_addr, addr, addr->sa_family == AF_INET ? |
818 | sizeof(struct sockaddr_in) : | |
819 | sizeof(struct sockaddr_in6)); | |
3f446754 | 820 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.dst_addr; |
75216638 SH |
821 | memcpy(&resp.dst_addr, addr, addr->sa_family == AF_INET ? |
822 | sizeof(struct sockaddr_in) : | |
823 | sizeof(struct sockaddr_in6)); | |
824 | if (!ctx->cm_id->device) | |
825 | goto out; | |
826 | ||
9cda779c | 827 | resp.node_guid = (__force __u64) ctx->cm_id->device->node_guid; |
75216638 | 828 | resp.port_num = ctx->cm_id->port_num; |
c72f2189 | 829 | |
fe53ba2f | 830 | if (rdma_cap_ib_sa(ctx->cm_id->device, ctx->cm_id->port_num)) |
c72f2189 | 831 | ucma_copy_ib_route(&resp, &ctx->cm_id->route); |
5d9fb044 | 832 | else if (rdma_protocol_roce(ctx->cm_id->device, ctx->cm_id->port_num)) |
c72f2189 MW |
833 | ucma_copy_iboe_route(&resp, &ctx->cm_id->route); |
834 | else if (rdma_protocol_iwarp(ctx->cm_id->device, ctx->cm_id->port_num)) | |
e86f8b06 | 835 | ucma_copy_iw_route(&resp, &ctx->cm_id->route); |
75216638 SH |
836 | |
837 | out: | |
838 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
839 | &resp, sizeof(resp))) | |
840 | ret = -EFAULT; | |
841 | ||
842 | ucma_put_ctx(ctx); | |
843 | return ret; | |
844 | } | |
845 | ||
ee7aed45 SH |
846 | static void ucma_query_device_addr(struct rdma_cm_id *cm_id, |
847 | struct rdma_ucm_query_addr_resp *resp) | |
848 | { | |
849 | if (!cm_id->device) | |
850 | return; | |
851 | ||
852 | resp->node_guid = (__force __u64) cm_id->device->node_guid; | |
853 | resp->port_num = cm_id->port_num; | |
854 | resp->pkey = (__force __u16) cpu_to_be16( | |
855 | ib_addr_get_pkey(&cm_id->route.addr.dev_addr)); | |
856 | } | |
857 | ||
858 | static ssize_t ucma_query_addr(struct ucma_context *ctx, | |
859 | void __user *response, int out_len) | |
860 | { | |
861 | struct rdma_ucm_query_addr_resp resp; | |
862 | struct sockaddr *addr; | |
863 | int ret = 0; | |
864 | ||
865 | if (out_len < sizeof(resp)) | |
866 | return -ENOSPC; | |
867 | ||
868 | memset(&resp, 0, sizeof resp); | |
869 | ||
870 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.src_addr; | |
871 | resp.src_size = rdma_addr_size(addr); | |
872 | memcpy(&resp.src_addr, addr, resp.src_size); | |
873 | ||
874 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.dst_addr; | |
875 | resp.dst_size = rdma_addr_size(addr); | |
876 | memcpy(&resp.dst_addr, addr, resp.dst_size); | |
877 | ||
878 | ucma_query_device_addr(ctx->cm_id, &resp); | |
879 | ||
880 | if (copy_to_user(response, &resp, sizeof(resp))) | |
881 | ret = -EFAULT; | |
882 | ||
883 | return ret; | |
884 | } | |
885 | ||
ac53b264 SH |
886 | static ssize_t ucma_query_path(struct ucma_context *ctx, |
887 | void __user *response, int out_len) | |
888 | { | |
889 | struct rdma_ucm_query_path_resp *resp; | |
890 | int i, ret = 0; | |
891 | ||
892 | if (out_len < sizeof(*resp)) | |
893 | return -ENOSPC; | |
894 | ||
895 | resp = kzalloc(out_len, GFP_KERNEL); | |
896 | if (!resp) | |
897 | return -ENOMEM; | |
898 | ||
899 | resp->num_paths = ctx->cm_id->route.num_paths; | |
900 | for (i = 0, out_len -= sizeof(*resp); | |
901 | i < resp->num_paths && out_len > sizeof(struct ib_path_rec_data); | |
902 | i++, out_len -= sizeof(struct ib_path_rec_data)) { | |
57520751 | 903 | struct sa_path_rec *rec = &ctx->cm_id->route.path_rec[i]; |
ac53b264 SH |
904 | |
905 | resp->path_data[i].flags = IB_PATH_GMP | IB_PATH_PRIMARY | | |
906 | IB_PATH_BIDIRECTIONAL; | |
89838118 | 907 | if (rec->rec_type == SA_PATH_REC_TYPE_OPA) { |
57520751 DC |
908 | struct sa_path_rec ib; |
909 | ||
910 | sa_convert_path_opa_to_ib(&ib, rec); | |
911 | ib_sa_pack_path(&ib, &resp->path_data[i].path_rec); | |
89838118 PP |
912 | |
913 | } else { | |
914 | ib_sa_pack_path(rec, &resp->path_data[i].path_rec); | |
57520751 | 915 | } |
ac53b264 SH |
916 | } |
917 | ||
918 | if (copy_to_user(response, resp, | |
919 | sizeof(*resp) + (i * sizeof(struct ib_path_rec_data)))) | |
920 | ret = -EFAULT; | |
921 | ||
922 | kfree(resp); | |
923 | return ret; | |
924 | } | |
925 | ||
edaa7a55 SH |
926 | static ssize_t ucma_query_gid(struct ucma_context *ctx, |
927 | void __user *response, int out_len) | |
928 | { | |
929 | struct rdma_ucm_query_addr_resp resp; | |
930 | struct sockaddr_ib *addr; | |
931 | int ret = 0; | |
932 | ||
933 | if (out_len < sizeof(resp)) | |
934 | return -ENOSPC; | |
935 | ||
936 | memset(&resp, 0, sizeof resp); | |
937 | ||
938 | ucma_query_device_addr(ctx->cm_id, &resp); | |
939 | ||
940 | addr = (struct sockaddr_ib *) &resp.src_addr; | |
941 | resp.src_size = sizeof(*addr); | |
942 | if (ctx->cm_id->route.addr.src_addr.ss_family == AF_IB) { | |
943 | memcpy(addr, &ctx->cm_id->route.addr.src_addr, resp.src_size); | |
944 | } else { | |
945 | addr->sib_family = AF_IB; | |
946 | addr->sib_pkey = (__force __be16) resp.pkey; | |
7a2f64ee PP |
947 | rdma_read_gids(ctx->cm_id, (union ib_gid *)&addr->sib_addr, |
948 | NULL); | |
edaa7a55 SH |
949 | addr->sib_sid = rdma_get_service_id(ctx->cm_id, (struct sockaddr *) |
950 | &ctx->cm_id->route.addr.src_addr); | |
951 | } | |
952 | ||
953 | addr = (struct sockaddr_ib *) &resp.dst_addr; | |
954 | resp.dst_size = sizeof(*addr); | |
955 | if (ctx->cm_id->route.addr.dst_addr.ss_family == AF_IB) { | |
956 | memcpy(addr, &ctx->cm_id->route.addr.dst_addr, resp.dst_size); | |
957 | } else { | |
958 | addr->sib_family = AF_IB; | |
959 | addr->sib_pkey = (__force __be16) resp.pkey; | |
7a2f64ee PP |
960 | rdma_read_gids(ctx->cm_id, NULL, |
961 | (union ib_gid *)&addr->sib_addr); | |
edaa7a55 SH |
962 | addr->sib_sid = rdma_get_service_id(ctx->cm_id, (struct sockaddr *) |
963 | &ctx->cm_id->route.addr.dst_addr); | |
964 | } | |
965 | ||
966 | if (copy_to_user(response, &resp, sizeof(resp))) | |
967 | ret = -EFAULT; | |
968 | ||
969 | return ret; | |
970 | } | |
971 | ||
ee7aed45 SH |
972 | static ssize_t ucma_query(struct ucma_file *file, |
973 | const char __user *inbuf, | |
974 | int in_len, int out_len) | |
975 | { | |
976 | struct rdma_ucm_query cmd; | |
977 | struct ucma_context *ctx; | |
978 | void __user *response; | |
979 | int ret; | |
980 | ||
981 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
982 | return -EFAULT; | |
983 | ||
984 | response = (void __user *)(unsigned long) cmd.response; | |
985 | ctx = ucma_get_ctx(file, cmd.id); | |
986 | if (IS_ERR(ctx)) | |
987 | return PTR_ERR(ctx); | |
988 | ||
989 | switch (cmd.option) { | |
990 | case RDMA_USER_CM_QUERY_ADDR: | |
991 | ret = ucma_query_addr(ctx, response, out_len); | |
992 | break; | |
ac53b264 SH |
993 | case RDMA_USER_CM_QUERY_PATH: |
994 | ret = ucma_query_path(ctx, response, out_len); | |
995 | break; | |
edaa7a55 SH |
996 | case RDMA_USER_CM_QUERY_GID: |
997 | ret = ucma_query_gid(ctx, response, out_len); | |
998 | break; | |
ee7aed45 SH |
999 | default: |
1000 | ret = -ENOSYS; | |
1001 | break; | |
1002 | } | |
1003 | ||
1004 | ucma_put_ctx(ctx); | |
1005 | return ret; | |
1006 | } | |
1007 | ||
5c438135 SH |
1008 | static void ucma_copy_conn_param(struct rdma_cm_id *id, |
1009 | struct rdma_conn_param *dst, | |
75216638 SH |
1010 | struct rdma_ucm_conn_param *src) |
1011 | { | |
1012 | dst->private_data = src->private_data; | |
1013 | dst->private_data_len = src->private_data_len; | |
1014 | dst->responder_resources =src->responder_resources; | |
1015 | dst->initiator_depth = src->initiator_depth; | |
1016 | dst->flow_control = src->flow_control; | |
1017 | dst->retry_count = src->retry_count; | |
1018 | dst->rnr_retry_count = src->rnr_retry_count; | |
1019 | dst->srq = src->srq; | |
1020 | dst->qp_num = src->qp_num; | |
5c438135 | 1021 | dst->qkey = (id->route.addr.src_addr.ss_family == AF_IB) ? src->qkey : 0; |
75216638 SH |
1022 | } |
1023 | ||
1024 | static ssize_t ucma_connect(struct ucma_file *file, const char __user *inbuf, | |
1025 | int in_len, int out_len) | |
1026 | { | |
1027 | struct rdma_ucm_connect cmd; | |
1028 | struct rdma_conn_param conn_param; | |
1029 | struct ucma_context *ctx; | |
1030 | int ret; | |
1031 | ||
1032 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1033 | return -EFAULT; | |
1034 | ||
1035 | if (!cmd.conn_param.valid) | |
1036 | return -EINVAL; | |
1037 | ||
1038 | ctx = ucma_get_ctx(file, cmd.id); | |
1039 | if (IS_ERR(ctx)) | |
1040 | return PTR_ERR(ctx); | |
1041 | ||
5c438135 | 1042 | ucma_copy_conn_param(ctx->cm_id, &conn_param, &cmd.conn_param); |
75216638 SH |
1043 | ret = rdma_connect(ctx->cm_id, &conn_param); |
1044 | ucma_put_ctx(ctx); | |
1045 | return ret; | |
1046 | } | |
1047 | ||
1048 | static ssize_t ucma_listen(struct ucma_file *file, const char __user *inbuf, | |
1049 | int in_len, int out_len) | |
1050 | { | |
1051 | struct rdma_ucm_listen cmd; | |
1052 | struct ucma_context *ctx; | |
1053 | int ret; | |
1054 | ||
1055 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1056 | return -EFAULT; | |
1057 | ||
1058 | ctx = ucma_get_ctx(file, cmd.id); | |
1059 | if (IS_ERR(ctx)) | |
1060 | return PTR_ERR(ctx); | |
1061 | ||
97cb7e40 SW |
1062 | ctx->backlog = cmd.backlog > 0 && cmd.backlog < max_backlog ? |
1063 | cmd.backlog : max_backlog; | |
75216638 SH |
1064 | ret = rdma_listen(ctx->cm_id, ctx->backlog); |
1065 | ucma_put_ctx(ctx); | |
1066 | return ret; | |
1067 | } | |
1068 | ||
1069 | static ssize_t ucma_accept(struct ucma_file *file, const char __user *inbuf, | |
1070 | int in_len, int out_len) | |
1071 | { | |
1072 | struct rdma_ucm_accept cmd; | |
1073 | struct rdma_conn_param conn_param; | |
1074 | struct ucma_context *ctx; | |
1075 | int ret; | |
1076 | ||
1077 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1078 | return -EFAULT; | |
1079 | ||
1080 | ctx = ucma_get_ctx(file, cmd.id); | |
1081 | if (IS_ERR(ctx)) | |
1082 | return PTR_ERR(ctx); | |
1083 | ||
1084 | if (cmd.conn_param.valid) { | |
5c438135 | 1085 | ucma_copy_conn_param(ctx->cm_id, &conn_param, &cmd.conn_param); |
9ced69ca | 1086 | mutex_lock(&file->mut); |
00313983 | 1087 | ret = __rdma_accept(ctx->cm_id, &conn_param, NULL); |
9ced69ca SH |
1088 | if (!ret) |
1089 | ctx->uid = cmd.uid; | |
1090 | mutex_unlock(&file->mut); | |
75216638 | 1091 | } else |
00313983 | 1092 | ret = __rdma_accept(ctx->cm_id, NULL, NULL); |
75216638 SH |
1093 | |
1094 | ucma_put_ctx(ctx); | |
1095 | return ret; | |
1096 | } | |
1097 | ||
1098 | static ssize_t ucma_reject(struct ucma_file *file, const char __user *inbuf, | |
1099 | int in_len, int out_len) | |
1100 | { | |
1101 | struct rdma_ucm_reject cmd; | |
1102 | struct ucma_context *ctx; | |
1103 | int ret; | |
1104 | ||
1105 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1106 | return -EFAULT; | |
1107 | ||
1108 | ctx = ucma_get_ctx(file, cmd.id); | |
1109 | if (IS_ERR(ctx)) | |
1110 | return PTR_ERR(ctx); | |
1111 | ||
1112 | ret = rdma_reject(ctx->cm_id, cmd.private_data, cmd.private_data_len); | |
1113 | ucma_put_ctx(ctx); | |
1114 | return ret; | |
1115 | } | |
1116 | ||
1117 | static ssize_t ucma_disconnect(struct ucma_file *file, const char __user *inbuf, | |
1118 | int in_len, int out_len) | |
1119 | { | |
1120 | struct rdma_ucm_disconnect cmd; | |
1121 | struct ucma_context *ctx; | |
1122 | int ret; | |
1123 | ||
1124 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1125 | return -EFAULT; | |
1126 | ||
1127 | ctx = ucma_get_ctx(file, cmd.id); | |
1128 | if (IS_ERR(ctx)) | |
1129 | return PTR_ERR(ctx); | |
1130 | ||
1131 | ret = rdma_disconnect(ctx->cm_id); | |
1132 | ucma_put_ctx(ctx); | |
1133 | return ret; | |
1134 | } | |
1135 | ||
1136 | static ssize_t ucma_init_qp_attr(struct ucma_file *file, | |
1137 | const char __user *inbuf, | |
1138 | int in_len, int out_len) | |
1139 | { | |
1140 | struct rdma_ucm_init_qp_attr cmd; | |
1141 | struct ib_uverbs_qp_attr resp; | |
1142 | struct ucma_context *ctx; | |
1143 | struct ib_qp_attr qp_attr; | |
1144 | int ret; | |
1145 | ||
1146 | if (out_len < sizeof(resp)) | |
1147 | return -ENOSPC; | |
1148 | ||
1149 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1150 | return -EFAULT; | |
1151 | ||
a5880b84 LR |
1152 | if (cmd.qp_state > IB_QPS_ERR) |
1153 | return -EINVAL; | |
1154 | ||
75216638 SH |
1155 | ctx = ucma_get_ctx(file, cmd.id); |
1156 | if (IS_ERR(ctx)) | |
1157 | return PTR_ERR(ctx); | |
1158 | ||
1159 | resp.qp_attr_mask = 0; | |
1160 | memset(&qp_attr, 0, sizeof qp_attr); | |
1161 | qp_attr.qp_state = cmd.qp_state; | |
1162 | ret = rdma_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask); | |
1163 | if (ret) | |
1164 | goto out; | |
1165 | ||
d541e455 | 1166 | ib_copy_qp_attr_to_user(ctx->cm_id->device, &resp, &qp_attr); |
75216638 SH |
1167 | if (copy_to_user((void __user *)(unsigned long)cmd.response, |
1168 | &resp, sizeof(resp))) | |
1169 | ret = -EFAULT; | |
1170 | ||
1171 | out: | |
1172 | ucma_put_ctx(ctx); | |
1173 | return ret; | |
1174 | } | |
1175 | ||
7ce86409 SH |
1176 | static int ucma_set_option_id(struct ucma_context *ctx, int optname, |
1177 | void *optval, size_t optlen) | |
1178 | { | |
1179 | int ret = 0; | |
1180 | ||
1181 | switch (optname) { | |
1182 | case RDMA_OPTION_ID_TOS: | |
1183 | if (optlen != sizeof(u8)) { | |
1184 | ret = -EINVAL; | |
1185 | break; | |
1186 | } | |
1187 | rdma_set_service_type(ctx->cm_id, *((u8 *) optval)); | |
1188 | break; | |
a9bb7912 HS |
1189 | case RDMA_OPTION_ID_REUSEADDR: |
1190 | if (optlen != sizeof(int)) { | |
1191 | ret = -EINVAL; | |
1192 | break; | |
1193 | } | |
1194 | ret = rdma_set_reuseaddr(ctx->cm_id, *((int *) optval) ? 1 : 0); | |
1195 | break; | |
68602120 SH |
1196 | case RDMA_OPTION_ID_AFONLY: |
1197 | if (optlen != sizeof(int)) { | |
1198 | ret = -EINVAL; | |
1199 | break; | |
1200 | } | |
1201 | ret = rdma_set_afonly(ctx->cm_id, *((int *) optval) ? 1 : 0); | |
1202 | break; | |
7ce86409 SH |
1203 | default: |
1204 | ret = -ENOSYS; | |
1205 | } | |
1206 | ||
1207 | return ret; | |
1208 | } | |
1209 | ||
a7ca1f00 SH |
1210 | static int ucma_set_ib_path(struct ucma_context *ctx, |
1211 | struct ib_path_rec_data *path_data, size_t optlen) | |
1212 | { | |
c2f8fc4e | 1213 | struct sa_path_rec sa_path; |
a7ca1f00 SH |
1214 | struct rdma_cm_event event; |
1215 | int ret; | |
1216 | ||
1217 | if (optlen % sizeof(*path_data)) | |
1218 | return -EINVAL; | |
1219 | ||
1220 | for (; optlen; optlen -= sizeof(*path_data), path_data++) { | |
1221 | if (path_data->flags == (IB_PATH_GMP | IB_PATH_PRIMARY | | |
1222 | IB_PATH_BIDIRECTIONAL)) | |
1223 | break; | |
1224 | } | |
1225 | ||
1226 | if (!optlen) | |
1227 | return -EINVAL; | |
1228 | ||
c2be9dc0 | 1229 | memset(&sa_path, 0, sizeof(sa_path)); |
c2be9dc0 | 1230 | |
57520751 | 1231 | sa_path.rec_type = SA_PATH_REC_TYPE_IB; |
a7ca1f00 | 1232 | ib_sa_unpack_path(path_data->path_rec, &sa_path); |
57520751 DC |
1233 | |
1234 | if (rdma_cap_opa_ah(ctx->cm_id->device, ctx->cm_id->port_num)) { | |
1235 | struct sa_path_rec opa; | |
1236 | ||
1237 | sa_convert_path_ib_to_opa(&opa, &sa_path); | |
fe75889f | 1238 | ret = rdma_set_ib_path(ctx->cm_id, &opa); |
57520751 | 1239 | } else { |
fe75889f | 1240 | ret = rdma_set_ib_path(ctx->cm_id, &sa_path); |
57520751 | 1241 | } |
a7ca1f00 SH |
1242 | if (ret) |
1243 | return ret; | |
1244 | ||
1245 | memset(&event, 0, sizeof event); | |
1246 | event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; | |
1247 | return ucma_event_handler(ctx->cm_id, &event); | |
1248 | } | |
1249 | ||
1250 | static int ucma_set_option_ib(struct ucma_context *ctx, int optname, | |
1251 | void *optval, size_t optlen) | |
1252 | { | |
1253 | int ret; | |
1254 | ||
1255 | switch (optname) { | |
1256 | case RDMA_OPTION_IB_PATH: | |
1257 | ret = ucma_set_ib_path(ctx, optval, optlen); | |
1258 | break; | |
1259 | default: | |
1260 | ret = -ENOSYS; | |
1261 | } | |
1262 | ||
1263 | return ret; | |
1264 | } | |
1265 | ||
7ce86409 SH |
1266 | static int ucma_set_option_level(struct ucma_context *ctx, int level, |
1267 | int optname, void *optval, size_t optlen) | |
1268 | { | |
1269 | int ret; | |
1270 | ||
1271 | switch (level) { | |
1272 | case RDMA_OPTION_ID: | |
1273 | ret = ucma_set_option_id(ctx, optname, optval, optlen); | |
1274 | break; | |
a7ca1f00 SH |
1275 | case RDMA_OPTION_IB: |
1276 | ret = ucma_set_option_ib(ctx, optname, optval, optlen); | |
1277 | break; | |
7ce86409 SH |
1278 | default: |
1279 | ret = -ENOSYS; | |
1280 | } | |
1281 | ||
1282 | return ret; | |
1283 | } | |
1284 | ||
1285 | static ssize_t ucma_set_option(struct ucma_file *file, const char __user *inbuf, | |
1286 | int in_len, int out_len) | |
1287 | { | |
1288 | struct rdma_ucm_set_option cmd; | |
1289 | struct ucma_context *ctx; | |
1290 | void *optval; | |
1291 | int ret; | |
1292 | ||
1293 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1294 | return -EFAULT; | |
1295 | ||
1296 | ctx = ucma_get_ctx(file, cmd.id); | |
1297 | if (IS_ERR(ctx)) | |
1298 | return PTR_ERR(ctx); | |
1299 | ||
6a21dfc0 LR |
1300 | if (unlikely(cmd.optval > KMALLOC_MAX_SIZE)) |
1301 | return -EINVAL; | |
1302 | ||
0764c76e RD |
1303 | optval = memdup_user((void __user *) (unsigned long) cmd.optval, |
1304 | cmd.optlen); | |
1305 | if (IS_ERR(optval)) { | |
1306 | ret = PTR_ERR(optval); | |
1307 | goto out; | |
7ce86409 SH |
1308 | } |
1309 | ||
1310 | ret = ucma_set_option_level(ctx, cmd.level, cmd.optname, optval, | |
1311 | cmd.optlen); | |
7ce86409 | 1312 | kfree(optval); |
0764c76e RD |
1313 | |
1314 | out: | |
7ce86409 SH |
1315 | ucma_put_ctx(ctx); |
1316 | return ret; | |
1317 | } | |
1318 | ||
75216638 SH |
1319 | static ssize_t ucma_notify(struct ucma_file *file, const char __user *inbuf, |
1320 | int in_len, int out_len) | |
1321 | { | |
1322 | struct rdma_ucm_notify cmd; | |
1323 | struct ucma_context *ctx; | |
1324 | int ret; | |
1325 | ||
1326 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1327 | return -EFAULT; | |
1328 | ||
1329 | ctx = ucma_get_ctx(file, cmd.id); | |
1330 | if (IS_ERR(ctx)) | |
1331 | return PTR_ERR(ctx); | |
1332 | ||
1333 | ret = rdma_notify(ctx->cm_id, (enum ib_event_type) cmd.event); | |
1334 | ucma_put_ctx(ctx); | |
1335 | return ret; | |
1336 | } | |
1337 | ||
5bc2b7b3 SH |
1338 | static ssize_t ucma_process_join(struct ucma_file *file, |
1339 | struct rdma_ucm_join_mcast *cmd, int out_len) | |
c8f6a362 | 1340 | { |
c8f6a362 SH |
1341 | struct rdma_ucm_create_id_resp resp; |
1342 | struct ucma_context *ctx; | |
1343 | struct ucma_multicast *mc; | |
5bc2b7b3 | 1344 | struct sockaddr *addr; |
c8f6a362 | 1345 | int ret; |
ab15c95a | 1346 | u8 join_state; |
c8f6a362 SH |
1347 | |
1348 | if (out_len < sizeof(resp)) | |
1349 | return -ENOSPC; | |
1350 | ||
5bc2b7b3 | 1351 | addr = (struct sockaddr *) &cmd->addr; |
0c81ffc6 | 1352 | if (cmd->addr_size != rdma_addr_size(addr)) |
ab15c95a AV |
1353 | return -EINVAL; |
1354 | ||
1355 | if (cmd->join_flags == RDMA_MC_JOIN_FLAG_FULLMEMBER) | |
1356 | join_state = BIT(FULLMEMBER_JOIN); | |
1357 | else if (cmd->join_flags == RDMA_MC_JOIN_FLAG_SENDONLY_FULLMEMBER) | |
1358 | join_state = BIT(SENDONLY_FULLMEMBER_JOIN); | |
1359 | else | |
5bc2b7b3 | 1360 | return -EINVAL; |
c8f6a362 | 1361 | |
5bc2b7b3 | 1362 | ctx = ucma_get_ctx(file, cmd->id); |
c8f6a362 SH |
1363 | if (IS_ERR(ctx)) |
1364 | return PTR_ERR(ctx); | |
1365 | ||
1366 | mutex_lock(&file->mut); | |
1367 | mc = ucma_alloc_multicast(ctx); | |
6aea938f JB |
1368 | if (!mc) { |
1369 | ret = -ENOMEM; | |
c8f6a362 SH |
1370 | goto err1; |
1371 | } | |
ab15c95a | 1372 | mc->join_state = join_state; |
5bc2b7b3 SH |
1373 | mc->uid = cmd->uid; |
1374 | memcpy(&mc->addr, addr, cmd->addr_size); | |
ab15c95a AV |
1375 | ret = rdma_join_multicast(ctx->cm_id, (struct sockaddr *)&mc->addr, |
1376 | join_state, mc); | |
c8f6a362 SH |
1377 | if (ret) |
1378 | goto err2; | |
1379 | ||
1380 | resp.id = mc->id; | |
5bc2b7b3 | 1381 | if (copy_to_user((void __user *)(unsigned long) cmd->response, |
c8f6a362 SH |
1382 | &resp, sizeof(resp))) { |
1383 | ret = -EFAULT; | |
1384 | goto err3; | |
1385 | } | |
1386 | ||
1387 | mutex_unlock(&file->mut); | |
1388 | ucma_put_ctx(ctx); | |
1389 | return 0; | |
1390 | ||
1391 | err3: | |
3f446754 | 1392 | rdma_leave_multicast(ctx->cm_id, (struct sockaddr *) &mc->addr); |
c8f6a362 SH |
1393 | ucma_cleanup_mc_events(mc); |
1394 | err2: | |
1395 | mutex_lock(&mut); | |
1396 | idr_remove(&multicast_idr, mc->id); | |
1397 | mutex_unlock(&mut); | |
1398 | list_del(&mc->list); | |
1399 | kfree(mc); | |
1400 | err1: | |
1401 | mutex_unlock(&file->mut); | |
1402 | ucma_put_ctx(ctx); | |
1403 | return ret; | |
1404 | } | |
1405 | ||
5bc2b7b3 SH |
1406 | static ssize_t ucma_join_ip_multicast(struct ucma_file *file, |
1407 | const char __user *inbuf, | |
1408 | int in_len, int out_len) | |
1409 | { | |
1410 | struct rdma_ucm_join_ip_mcast cmd; | |
1411 | struct rdma_ucm_join_mcast join_cmd; | |
1412 | ||
1413 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1414 | return -EFAULT; | |
1415 | ||
1416 | join_cmd.response = cmd.response; | |
1417 | join_cmd.uid = cmd.uid; | |
1418 | join_cmd.id = cmd.id; | |
1419 | join_cmd.addr_size = rdma_addr_size((struct sockaddr *) &cmd.addr); | |
0c81ffc6 LR |
1420 | if (!join_cmd.addr_size) |
1421 | return -EINVAL; | |
1422 | ||
ab15c95a | 1423 | join_cmd.join_flags = RDMA_MC_JOIN_FLAG_FULLMEMBER; |
5bc2b7b3 SH |
1424 | memcpy(&join_cmd.addr, &cmd.addr, join_cmd.addr_size); |
1425 | ||
1426 | return ucma_process_join(file, &join_cmd, out_len); | |
1427 | } | |
1428 | ||
1429 | static ssize_t ucma_join_multicast(struct ucma_file *file, | |
1430 | const char __user *inbuf, | |
1431 | int in_len, int out_len) | |
1432 | { | |
1433 | struct rdma_ucm_join_mcast cmd; | |
1434 | ||
1435 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1436 | return -EFAULT; | |
1437 | ||
0c81ffc6 LR |
1438 | if (!rdma_addr_size((struct sockaddr *)&cmd.addr)) |
1439 | return -EINVAL; | |
1440 | ||
5bc2b7b3 SH |
1441 | return ucma_process_join(file, &cmd, out_len); |
1442 | } | |
1443 | ||
c8f6a362 SH |
1444 | static ssize_t ucma_leave_multicast(struct ucma_file *file, |
1445 | const char __user *inbuf, | |
1446 | int in_len, int out_len) | |
1447 | { | |
1448 | struct rdma_ucm_destroy_id cmd; | |
1449 | struct rdma_ucm_destroy_id_resp resp; | |
1450 | struct ucma_multicast *mc; | |
1451 | int ret = 0; | |
1452 | ||
1453 | if (out_len < sizeof(resp)) | |
1454 | return -ENOSPC; | |
1455 | ||
1456 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1457 | return -EFAULT; | |
1458 | ||
1459 | mutex_lock(&mut); | |
1460 | mc = idr_find(&multicast_idr, cmd.id); | |
1461 | if (!mc) | |
1462 | mc = ERR_PTR(-ENOENT); | |
1463 | else if (mc->ctx->file != file) | |
1464 | mc = ERR_PTR(-EINVAL); | |
7e967fd0 JG |
1465 | else if (!atomic_inc_not_zero(&mc->ctx->ref)) |
1466 | mc = ERR_PTR(-ENXIO); | |
1467 | else | |
c8f6a362 | 1468 | idr_remove(&multicast_idr, mc->id); |
c8f6a362 SH |
1469 | mutex_unlock(&mut); |
1470 | ||
1471 | if (IS_ERR(mc)) { | |
1472 | ret = PTR_ERR(mc); | |
1473 | goto out; | |
1474 | } | |
1475 | ||
3f446754 | 1476 | rdma_leave_multicast(mc->ctx->cm_id, (struct sockaddr *) &mc->addr); |
c8f6a362 SH |
1477 | mutex_lock(&mc->ctx->file->mut); |
1478 | ucma_cleanup_mc_events(mc); | |
1479 | list_del(&mc->list); | |
1480 | mutex_unlock(&mc->ctx->file->mut); | |
1481 | ||
1482 | ucma_put_ctx(mc->ctx); | |
1483 | resp.events_reported = mc->events_reported; | |
1484 | kfree(mc); | |
1485 | ||
1486 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
1487 | &resp, sizeof(resp))) | |
1488 | ret = -EFAULT; | |
1489 | out: | |
1490 | return ret; | |
1491 | } | |
1492 | ||
88314e4d SH |
1493 | static void ucma_lock_files(struct ucma_file *file1, struct ucma_file *file2) |
1494 | { | |
1495 | /* Acquire mutex's based on pointer comparison to prevent deadlock. */ | |
1496 | if (file1 < file2) { | |
1497 | mutex_lock(&file1->mut); | |
31b57b87 | 1498 | mutex_lock_nested(&file2->mut, SINGLE_DEPTH_NESTING); |
88314e4d SH |
1499 | } else { |
1500 | mutex_lock(&file2->mut); | |
31b57b87 | 1501 | mutex_lock_nested(&file1->mut, SINGLE_DEPTH_NESTING); |
88314e4d SH |
1502 | } |
1503 | } | |
1504 | ||
1505 | static void ucma_unlock_files(struct ucma_file *file1, struct ucma_file *file2) | |
1506 | { | |
1507 | if (file1 < file2) { | |
1508 | mutex_unlock(&file2->mut); | |
1509 | mutex_unlock(&file1->mut); | |
1510 | } else { | |
1511 | mutex_unlock(&file1->mut); | |
1512 | mutex_unlock(&file2->mut); | |
1513 | } | |
1514 | } | |
1515 | ||
1516 | static void ucma_move_events(struct ucma_context *ctx, struct ucma_file *file) | |
1517 | { | |
1518 | struct ucma_event *uevent, *tmp; | |
1519 | ||
1520 | list_for_each_entry_safe(uevent, tmp, &ctx->file->event_list, list) | |
1521 | if (uevent->ctx == ctx) | |
1522 | list_move_tail(&uevent->list, &file->event_list); | |
1523 | } | |
1524 | ||
1525 | static ssize_t ucma_migrate_id(struct ucma_file *new_file, | |
1526 | const char __user *inbuf, | |
1527 | int in_len, int out_len) | |
1528 | { | |
1529 | struct rdma_ucm_migrate_id cmd; | |
1530 | struct rdma_ucm_migrate_resp resp; | |
1531 | struct ucma_context *ctx; | |
2903ff01 | 1532 | struct fd f; |
88314e4d SH |
1533 | struct ucma_file *cur_file; |
1534 | int ret = 0; | |
1535 | ||
1536 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1537 | return -EFAULT; | |
1538 | ||
1539 | /* Get current fd to protect against it being closed */ | |
2903ff01 AV |
1540 | f = fdget(cmd.fd); |
1541 | if (!f.file) | |
88314e4d SH |
1542 | return -ENOENT; |
1543 | ||
1544 | /* Validate current fd and prevent destruction of id. */ | |
2903ff01 | 1545 | ctx = ucma_get_ctx(f.file->private_data, cmd.id); |
88314e4d SH |
1546 | if (IS_ERR(ctx)) { |
1547 | ret = PTR_ERR(ctx); | |
1548 | goto file_put; | |
1549 | } | |
1550 | ||
1551 | cur_file = ctx->file; | |
1552 | if (cur_file == new_file) { | |
1553 | resp.events_reported = ctx->events_reported; | |
1554 | goto response; | |
1555 | } | |
1556 | ||
1557 | /* | |
1558 | * Migrate events between fd's, maintaining order, and avoiding new | |
1559 | * events being added before existing events. | |
1560 | */ | |
1561 | ucma_lock_files(cur_file, new_file); | |
1562 | mutex_lock(&mut); | |
1563 | ||
1564 | list_move_tail(&ctx->list, &new_file->ctx_list); | |
1565 | ucma_move_events(ctx, new_file); | |
1566 | ctx->file = new_file; | |
1567 | resp.events_reported = ctx->events_reported; | |
1568 | ||
1569 | mutex_unlock(&mut); | |
1570 | ucma_unlock_files(cur_file, new_file); | |
1571 | ||
1572 | response: | |
1573 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
1574 | &resp, sizeof(resp))) | |
1575 | ret = -EFAULT; | |
1576 | ||
1577 | ucma_put_ctx(ctx); | |
1578 | file_put: | |
2903ff01 | 1579 | fdput(f); |
88314e4d SH |
1580 | return ret; |
1581 | } | |
1582 | ||
75216638 SH |
1583 | static ssize_t (*ucma_cmd_table[])(struct ucma_file *file, |
1584 | const char __user *inbuf, | |
1585 | int in_len, int out_len) = { | |
05ad9457 SH |
1586 | [RDMA_USER_CM_CMD_CREATE_ID] = ucma_create_id, |
1587 | [RDMA_USER_CM_CMD_DESTROY_ID] = ucma_destroy_id, | |
1588 | [RDMA_USER_CM_CMD_BIND_IP] = ucma_bind_ip, | |
1589 | [RDMA_USER_CM_CMD_RESOLVE_IP] = ucma_resolve_ip, | |
1590 | [RDMA_USER_CM_CMD_RESOLVE_ROUTE] = ucma_resolve_route, | |
1591 | [RDMA_USER_CM_CMD_QUERY_ROUTE] = ucma_query_route, | |
1592 | [RDMA_USER_CM_CMD_CONNECT] = ucma_connect, | |
1593 | [RDMA_USER_CM_CMD_LISTEN] = ucma_listen, | |
1594 | [RDMA_USER_CM_CMD_ACCEPT] = ucma_accept, | |
1595 | [RDMA_USER_CM_CMD_REJECT] = ucma_reject, | |
1596 | [RDMA_USER_CM_CMD_DISCONNECT] = ucma_disconnect, | |
1597 | [RDMA_USER_CM_CMD_INIT_QP_ATTR] = ucma_init_qp_attr, | |
1598 | [RDMA_USER_CM_CMD_GET_EVENT] = ucma_get_event, | |
1599 | [RDMA_USER_CM_CMD_GET_OPTION] = NULL, | |
1600 | [RDMA_USER_CM_CMD_SET_OPTION] = ucma_set_option, | |
1601 | [RDMA_USER_CM_CMD_NOTIFY] = ucma_notify, | |
1602 | [RDMA_USER_CM_CMD_JOIN_IP_MCAST] = ucma_join_ip_multicast, | |
1603 | [RDMA_USER_CM_CMD_LEAVE_MCAST] = ucma_leave_multicast, | |
1604 | [RDMA_USER_CM_CMD_MIGRATE_ID] = ucma_migrate_id, | |
eebe4c3a | 1605 | [RDMA_USER_CM_CMD_QUERY] = ucma_query, |
209cf2a7 | 1606 | [RDMA_USER_CM_CMD_BIND] = ucma_bind, |
5bc2b7b3 SH |
1607 | [RDMA_USER_CM_CMD_RESOLVE_ADDR] = ucma_resolve_addr, |
1608 | [RDMA_USER_CM_CMD_JOIN_MCAST] = ucma_join_multicast | |
75216638 SH |
1609 | }; |
1610 | ||
1611 | static ssize_t ucma_write(struct file *filp, const char __user *buf, | |
1612 | size_t len, loff_t *pos) | |
1613 | { | |
1614 | struct ucma_file *file = filp->private_data; | |
1615 | struct rdma_ucm_cmd_hdr hdr; | |
1616 | ssize_t ret; | |
1617 | ||
f73a1dbc LR |
1618 | if (!ib_safe_file_access(filp)) { |
1619 | pr_err_once("ucma_write: process %d (%s) changed security contexts after opening file descriptor, this is not allowed.\n", | |
1620 | task_tgid_vnr(current), current->comm); | |
e6bd18f5 | 1621 | return -EACCES; |
f73a1dbc | 1622 | } |
e6bd18f5 | 1623 | |
75216638 SH |
1624 | if (len < sizeof(hdr)) |
1625 | return -EINVAL; | |
1626 | ||
1627 | if (copy_from_user(&hdr, buf, sizeof(hdr))) | |
1628 | return -EFAULT; | |
1629 | ||
caf6e3f2 | 1630 | if (hdr.cmd >= ARRAY_SIZE(ucma_cmd_table)) |
75216638 SH |
1631 | return -EINVAL; |
1632 | ||
1633 | if (hdr.in + sizeof(hdr) > len) | |
1634 | return -EINVAL; | |
1635 | ||
1636 | if (!ucma_cmd_table[hdr.cmd]) | |
1637 | return -ENOSYS; | |
1638 | ||
1639 | ret = ucma_cmd_table[hdr.cmd](file, buf + sizeof(hdr), hdr.in, hdr.out); | |
1640 | if (!ret) | |
1641 | ret = len; | |
1642 | ||
1643 | return ret; | |
1644 | } | |
1645 | ||
afc9a42b | 1646 | static __poll_t ucma_poll(struct file *filp, struct poll_table_struct *wait) |
75216638 SH |
1647 | { |
1648 | struct ucma_file *file = filp->private_data; | |
afc9a42b | 1649 | __poll_t mask = 0; |
75216638 SH |
1650 | |
1651 | poll_wait(filp, &file->poll_wait, wait); | |
1652 | ||
1653 | if (!list_empty(&file->event_list)) | |
a9a08845 | 1654 | mask = EPOLLIN | EPOLLRDNORM; |
75216638 SH |
1655 | |
1656 | return mask; | |
1657 | } | |
1658 | ||
f7a6117e RD |
1659 | /* |
1660 | * ucma_open() does not need the BKL: | |
1661 | * | |
1662 | * - no global state is referred to; | |
1663 | * - there is no ioctl method to race against; | |
1664 | * - no further module initialization is required for open to work | |
1665 | * after the device is registered. | |
1666 | */ | |
75216638 SH |
1667 | static int ucma_open(struct inode *inode, struct file *filp) |
1668 | { | |
1669 | struct ucma_file *file; | |
1670 | ||
1671 | file = kmalloc(sizeof *file, GFP_KERNEL); | |
1672 | if (!file) | |
1673 | return -ENOMEM; | |
1674 | ||
a190d3b0 BS |
1675 | file->close_wq = alloc_ordered_workqueue("ucma_close_id", |
1676 | WQ_MEM_RECLAIM); | |
0174b381 SL |
1677 | if (!file->close_wq) { |
1678 | kfree(file); | |
1679 | return -ENOMEM; | |
1680 | } | |
1681 | ||
75216638 SH |
1682 | INIT_LIST_HEAD(&file->event_list); |
1683 | INIT_LIST_HEAD(&file->ctx_list); | |
1684 | init_waitqueue_head(&file->poll_wait); | |
1685 | mutex_init(&file->mut); | |
1686 | ||
1687 | filp->private_data = file; | |
1688 | file->filp = filp; | |
bc1db9af RD |
1689 | |
1690 | return nonseekable_open(inode, filp); | |
75216638 SH |
1691 | } |
1692 | ||
1693 | static int ucma_close(struct inode *inode, struct file *filp) | |
1694 | { | |
1695 | struct ucma_file *file = filp->private_data; | |
1696 | struct ucma_context *ctx, *tmp; | |
1697 | ||
1698 | mutex_lock(&file->mut); | |
1699 | list_for_each_entry_safe(ctx, tmp, &file->ctx_list, list) { | |
e1c30298 | 1700 | ctx->destroying = 1; |
75216638 SH |
1701 | mutex_unlock(&file->mut); |
1702 | ||
1703 | mutex_lock(&mut); | |
1704 | idr_remove(&ctx_idr, ctx->id); | |
1705 | mutex_unlock(&mut); | |
1706 | ||
e1c30298 YH |
1707 | flush_workqueue(file->close_wq); |
1708 | /* At that step once ctx was marked as destroying and workqueue | |
1709 | * was flushed we are safe from any inflights handlers that | |
1710 | * might put other closing task. | |
1711 | */ | |
1712 | mutex_lock(&mut); | |
1713 | if (!ctx->closing) { | |
1714 | mutex_unlock(&mut); | |
1715 | /* rdma_destroy_id ensures that no event handlers are | |
1716 | * inflight for that id before releasing it. | |
1717 | */ | |
1718 | rdma_destroy_id(ctx->cm_id); | |
1719 | } else { | |
1720 | mutex_unlock(&mut); | |
1721 | } | |
1722 | ||
75216638 SH |
1723 | ucma_free_ctx(ctx); |
1724 | mutex_lock(&file->mut); | |
1725 | } | |
1726 | mutex_unlock(&file->mut); | |
e1c30298 | 1727 | destroy_workqueue(file->close_wq); |
75216638 SH |
1728 | kfree(file); |
1729 | return 0; | |
1730 | } | |
1731 | ||
2b8693c0 | 1732 | static const struct file_operations ucma_fops = { |
75216638 SH |
1733 | .owner = THIS_MODULE, |
1734 | .open = ucma_open, | |
1735 | .release = ucma_close, | |
1736 | .write = ucma_write, | |
1737 | .poll = ucma_poll, | |
bc1db9af | 1738 | .llseek = no_llseek, |
75216638 SH |
1739 | }; |
1740 | ||
1741 | static struct miscdevice ucma_misc = { | |
04ea2f81 RD |
1742 | .minor = MISC_DYNAMIC_MINOR, |
1743 | .name = "rdma_cm", | |
1744 | .nodename = "infiniband/rdma_cm", | |
1745 | .mode = 0666, | |
1746 | .fops = &ucma_fops, | |
75216638 SH |
1747 | }; |
1748 | ||
1749 | static ssize_t show_abi_version(struct device *dev, | |
1750 | struct device_attribute *attr, | |
1751 | char *buf) | |
1752 | { | |
1753 | return sprintf(buf, "%d\n", RDMA_USER_CM_ABI_VERSION); | |
1754 | } | |
1755 | static DEVICE_ATTR(abi_version, S_IRUGO, show_abi_version, NULL); | |
1756 | ||
1757 | static int __init ucma_init(void) | |
1758 | { | |
1759 | int ret; | |
1760 | ||
1761 | ret = misc_register(&ucma_misc); | |
1762 | if (ret) | |
1763 | return ret; | |
1764 | ||
1765 | ret = device_create_file(ucma_misc.this_device, &dev_attr_abi_version); | |
1766 | if (ret) { | |
aba25a3e | 1767 | pr_err("rdma_ucm: couldn't create abi_version attr\n"); |
97cb7e40 SW |
1768 | goto err1; |
1769 | } | |
1770 | ||
ec8f23ce | 1771 | ucma_ctl_table_hdr = register_net_sysctl(&init_net, "net/rdma_ucm", ucma_ctl_table); |
97cb7e40 | 1772 | if (!ucma_ctl_table_hdr) { |
aba25a3e | 1773 | pr_err("rdma_ucm: couldn't register sysctl paths\n"); |
97cb7e40 SW |
1774 | ret = -ENOMEM; |
1775 | goto err2; | |
75216638 SH |
1776 | } |
1777 | return 0; | |
97cb7e40 SW |
1778 | err2: |
1779 | device_remove_file(ucma_misc.this_device, &dev_attr_abi_version); | |
1780 | err1: | |
75216638 SH |
1781 | misc_deregister(&ucma_misc); |
1782 | return ret; | |
1783 | } | |
1784 | ||
1785 | static void __exit ucma_cleanup(void) | |
1786 | { | |
5dd3df10 | 1787 | unregister_net_sysctl_table(ucma_ctl_table_hdr); |
75216638 SH |
1788 | device_remove_file(ucma_misc.this_device, &dev_attr_abi_version); |
1789 | misc_deregister(&ucma_misc); | |
1790 | idr_destroy(&ctx_idr); | |
45d25420 | 1791 | idr_destroy(&multicast_idr); |
75216638 SH |
1792 | } |
1793 | ||
1794 | module_init(ucma_init); | |
1795 | module_exit(ucma_cleanup); |