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75216638 SH |
1 | /* |
2 | * Copyright (c) 2005-2006 Intel Corporation. All rights reserved. | |
3 | * | |
4 | * This software is available to you under a choice of one of two | |
5 | * licenses. You may choose to be licensed under the terms of the GNU | |
6 | * General Public License (GPL) Version 2, available from the file | |
7 | * COPYING in the main directory of this source tree, or the | |
8 | * OpenIB.org BSD license below: | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or | |
11 | * without modification, are permitted provided that the following | |
12 | * conditions are met: | |
13 | * | |
14 | * - Redistributions of source code must retain the above | |
15 | * copyright notice, this list of conditions and the following | |
16 | * disclaimer. | |
17 | * | |
18 | * - Redistributions in binary form must reproduce the above | |
19 | * copyright notice, this list of conditions and the following | |
20 | * disclaimer in the documentation and/or other materials | |
21 | * provided with the distribution. | |
22 | * | |
23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
30 | * SOFTWARE. | |
31 | */ | |
32 | ||
33 | #include <linux/completion.h> | |
88314e4d | 34 | #include <linux/file.h> |
75216638 SH |
35 | #include <linux/mutex.h> |
36 | #include <linux/poll.h> | |
d43c36dc | 37 | #include <linux/sched.h> |
75216638 SH |
38 | #include <linux/idr.h> |
39 | #include <linux/in.h> | |
40 | #include <linux/in6.h> | |
41 | #include <linux/miscdevice.h> | |
5a0e3ad6 | 42 | #include <linux/slab.h> |
97cb7e40 | 43 | #include <linux/sysctl.h> |
e4dd23d7 | 44 | #include <linux/module.h> |
95893dde | 45 | #include <linux/nsproxy.h> |
75216638 | 46 | |
5f654aac GS |
47 | #include <linux/nospec.h> |
48 | ||
75216638 SH |
49 | #include <rdma/rdma_user_cm.h> |
50 | #include <rdma/ib_marshall.h> | |
51 | #include <rdma/rdma_cm.h> | |
a7ca1f00 | 52 | #include <rdma/rdma_cm_ib.h> |
ee7aed45 | 53 | #include <rdma/ib_addr.h> |
edaa7a55 | 54 | #include <rdma/ib.h> |
75216638 SH |
55 | |
56 | MODULE_AUTHOR("Sean Hefty"); | |
57 | MODULE_DESCRIPTION("RDMA Userspace Connection Manager Access"); | |
58 | MODULE_LICENSE("Dual BSD/GPL"); | |
59 | ||
97cb7e40 SW |
60 | static unsigned int max_backlog = 1024; |
61 | ||
62 | static struct ctl_table_header *ucma_ctl_table_hdr; | |
f3a5e3e3 | 63 | static struct ctl_table ucma_ctl_table[] = { |
97cb7e40 SW |
64 | { |
65 | .procname = "max_backlog", | |
66 | .data = &max_backlog, | |
67 | .maxlen = sizeof max_backlog, | |
68 | .mode = 0644, | |
69 | .proc_handler = proc_dointvec, | |
70 | }, | |
71 | { } | |
72 | }; | |
73 | ||
75216638 SH |
74 | struct ucma_file { |
75 | struct mutex mut; | |
76 | struct file *filp; | |
77 | struct list_head ctx_list; | |
78 | struct list_head event_list; | |
79 | wait_queue_head_t poll_wait; | |
e1c30298 | 80 | struct workqueue_struct *close_wq; |
75216638 SH |
81 | }; |
82 | ||
83 | struct ucma_context { | |
84 | int id; | |
85 | struct completion comp; | |
86 | atomic_t ref; | |
87 | int events_reported; | |
88 | int backlog; | |
89 | ||
90 | struct ucma_file *file; | |
91 | struct rdma_cm_id *cm_id; | |
92 | u64 uid; | |
93 | ||
94 | struct list_head list; | |
c8f6a362 | 95 | struct list_head mc_list; |
e1c30298 YH |
96 | /* mark that device is in process of destroying the internal HW |
97 | * resources, protected by the global mut | |
98 | */ | |
99 | int closing; | |
100 | /* sync between removal event and id destroy, protected by file mut */ | |
101 | int destroying; | |
102 | struct work_struct close_work; | |
c8f6a362 SH |
103 | }; |
104 | ||
105 | struct ucma_multicast { | |
106 | struct ucma_context *ctx; | |
107 | int id; | |
108 | int events_reported; | |
109 | ||
110 | u64 uid; | |
ab15c95a | 111 | u8 join_state; |
c8f6a362 | 112 | struct list_head list; |
3f446754 | 113 | struct sockaddr_storage addr; |
75216638 SH |
114 | }; |
115 | ||
116 | struct ucma_event { | |
117 | struct ucma_context *ctx; | |
c8f6a362 | 118 | struct ucma_multicast *mc; |
75216638 SH |
119 | struct list_head list; |
120 | struct rdma_cm_id *cm_id; | |
121 | struct rdma_ucm_event_resp resp; | |
e1c30298 | 122 | struct work_struct close_work; |
75216638 SH |
123 | }; |
124 | ||
125 | static DEFINE_MUTEX(mut); | |
126 | static DEFINE_IDR(ctx_idr); | |
c8f6a362 | 127 | static DEFINE_IDR(multicast_idr); |
75216638 | 128 | |
ea18ff00 JH |
129 | static const struct file_operations ucma_fops; |
130 | ||
75216638 SH |
131 | static inline struct ucma_context *_ucma_find_context(int id, |
132 | struct ucma_file *file) | |
133 | { | |
134 | struct ucma_context *ctx; | |
135 | ||
136 | ctx = idr_find(&ctx_idr, id); | |
137 | if (!ctx) | |
138 | ctx = ERR_PTR(-ENOENT); | |
2cd09c40 | 139 | else if (ctx->file != file || !ctx->cm_id) |
75216638 SH |
140 | ctx = ERR_PTR(-EINVAL); |
141 | return ctx; | |
142 | } | |
143 | ||
144 | static struct ucma_context *ucma_get_ctx(struct ucma_file *file, int id) | |
145 | { | |
146 | struct ucma_context *ctx; | |
147 | ||
148 | mutex_lock(&mut); | |
149 | ctx = _ucma_find_context(id, file); | |
e1c30298 YH |
150 | if (!IS_ERR(ctx)) { |
151 | if (ctx->closing) | |
152 | ctx = ERR_PTR(-EIO); | |
153 | else | |
154 | atomic_inc(&ctx->ref); | |
155 | } | |
75216638 SH |
156 | mutex_unlock(&mut); |
157 | return ctx; | |
158 | } | |
159 | ||
160 | static void ucma_put_ctx(struct ucma_context *ctx) | |
161 | { | |
162 | if (atomic_dec_and_test(&ctx->ref)) | |
163 | complete(&ctx->comp); | |
164 | } | |
165 | ||
e1c30298 YH |
166 | static void ucma_close_event_id(struct work_struct *work) |
167 | { | |
168 | struct ucma_event *uevent_close = container_of(work, struct ucma_event, close_work); | |
169 | ||
170 | rdma_destroy_id(uevent_close->cm_id); | |
171 | kfree(uevent_close); | |
172 | } | |
173 | ||
174 | static void ucma_close_id(struct work_struct *work) | |
175 | { | |
176 | struct ucma_context *ctx = container_of(work, struct ucma_context, close_work); | |
177 | ||
178 | /* once all inflight tasks are finished, we close all underlying | |
179 | * resources. The context is still alive till its explicit destryoing | |
180 | * by its creator. | |
181 | */ | |
182 | ucma_put_ctx(ctx); | |
183 | wait_for_completion(&ctx->comp); | |
184 | /* No new events will be generated after destroying the id. */ | |
185 | rdma_destroy_id(ctx->cm_id); | |
186 | } | |
187 | ||
75216638 SH |
188 | static struct ucma_context *ucma_alloc_ctx(struct ucma_file *file) |
189 | { | |
190 | struct ucma_context *ctx; | |
75216638 SH |
191 | |
192 | ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); | |
193 | if (!ctx) | |
194 | return NULL; | |
195 | ||
e1c30298 | 196 | INIT_WORK(&ctx->close_work, ucma_close_id); |
75216638 SH |
197 | atomic_set(&ctx->ref, 1); |
198 | init_completion(&ctx->comp); | |
c8f6a362 | 199 | INIT_LIST_HEAD(&ctx->mc_list); |
75216638 SH |
200 | ctx->file = file; |
201 | ||
3b069c5d TH |
202 | mutex_lock(&mut); |
203 | ctx->id = idr_alloc(&ctx_idr, ctx, 0, 0, GFP_KERNEL); | |
204 | mutex_unlock(&mut); | |
205 | if (ctx->id < 0) | |
75216638 SH |
206 | goto error; |
207 | ||
208 | list_add_tail(&ctx->list, &file->ctx_list); | |
209 | return ctx; | |
210 | ||
211 | error: | |
212 | kfree(ctx); | |
213 | return NULL; | |
214 | } | |
215 | ||
c8f6a362 SH |
216 | static struct ucma_multicast* ucma_alloc_multicast(struct ucma_context *ctx) |
217 | { | |
218 | struct ucma_multicast *mc; | |
c8f6a362 SH |
219 | |
220 | mc = kzalloc(sizeof(*mc), GFP_KERNEL); | |
221 | if (!mc) | |
222 | return NULL; | |
223 | ||
3b069c5d | 224 | mutex_lock(&mut); |
390874d6 | 225 | mc->id = idr_alloc(&multicast_idr, NULL, 0, 0, GFP_KERNEL); |
3b069c5d TH |
226 | mutex_unlock(&mut); |
227 | if (mc->id < 0) | |
c8f6a362 SH |
228 | goto error; |
229 | ||
230 | mc->ctx = ctx; | |
231 | list_add_tail(&mc->list, &ctx->mc_list); | |
232 | return mc; | |
233 | ||
234 | error: | |
235 | kfree(mc); | |
236 | return NULL; | |
237 | } | |
238 | ||
75216638 SH |
239 | static void ucma_copy_conn_event(struct rdma_ucm_conn_param *dst, |
240 | struct rdma_conn_param *src) | |
241 | { | |
242 | if (src->private_data_len) | |
243 | memcpy(dst->private_data, src->private_data, | |
244 | src->private_data_len); | |
245 | dst->private_data_len = src->private_data_len; | |
246 | dst->responder_resources =src->responder_resources; | |
247 | dst->initiator_depth = src->initiator_depth; | |
248 | dst->flow_control = src->flow_control; | |
249 | dst->retry_count = src->retry_count; | |
250 | dst->rnr_retry_count = src->rnr_retry_count; | |
251 | dst->srq = src->srq; | |
252 | dst->qp_num = src->qp_num; | |
253 | } | |
254 | ||
d541e455 DC |
255 | static void ucma_copy_ud_event(struct ib_device *device, |
256 | struct rdma_ucm_ud_param *dst, | |
75216638 SH |
257 | struct rdma_ud_param *src) |
258 | { | |
259 | if (src->private_data_len) | |
260 | memcpy(dst->private_data, src->private_data, | |
261 | src->private_data_len); | |
262 | dst->private_data_len = src->private_data_len; | |
d541e455 | 263 | ib_copy_ah_attr_to_user(device, &dst->ah_attr, &src->ah_attr); |
75216638 SH |
264 | dst->qp_num = src->qp_num; |
265 | dst->qkey = src->qkey; | |
266 | } | |
267 | ||
268 | static void ucma_set_event_context(struct ucma_context *ctx, | |
269 | struct rdma_cm_event *event, | |
270 | struct ucma_event *uevent) | |
271 | { | |
272 | uevent->ctx = ctx; | |
c8f6a362 SH |
273 | switch (event->event) { |
274 | case RDMA_CM_EVENT_MULTICAST_JOIN: | |
275 | case RDMA_CM_EVENT_MULTICAST_ERROR: | |
276 | uevent->mc = (struct ucma_multicast *) | |
277 | event->param.ud.private_data; | |
278 | uevent->resp.uid = uevent->mc->uid; | |
279 | uevent->resp.id = uevent->mc->id; | |
280 | break; | |
281 | default: | |
282 | uevent->resp.uid = ctx->uid; | |
283 | uevent->resp.id = ctx->id; | |
284 | break; | |
285 | } | |
75216638 SH |
286 | } |
287 | ||
e1c30298 YH |
288 | /* Called with file->mut locked for the relevant context. */ |
289 | static void ucma_removal_event_handler(struct rdma_cm_id *cm_id) | |
290 | { | |
291 | struct ucma_context *ctx = cm_id->context; | |
292 | struct ucma_event *con_req_eve; | |
293 | int event_found = 0; | |
294 | ||
295 | if (ctx->destroying) | |
296 | return; | |
297 | ||
298 | /* only if context is pointing to cm_id that it owns it and can be | |
299 | * queued to be closed, otherwise that cm_id is an inflight one that | |
300 | * is part of that context event list pending to be detached and | |
301 | * reattached to its new context as part of ucma_get_event, | |
302 | * handled separately below. | |
303 | */ | |
304 | if (ctx->cm_id == cm_id) { | |
305 | mutex_lock(&mut); | |
306 | ctx->closing = 1; | |
307 | mutex_unlock(&mut); | |
308 | queue_work(ctx->file->close_wq, &ctx->close_work); | |
309 | return; | |
310 | } | |
311 | ||
312 | list_for_each_entry(con_req_eve, &ctx->file->event_list, list) { | |
313 | if (con_req_eve->cm_id == cm_id && | |
314 | con_req_eve->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) { | |
315 | list_del(&con_req_eve->list); | |
316 | INIT_WORK(&con_req_eve->close_work, ucma_close_event_id); | |
317 | queue_work(ctx->file->close_wq, &con_req_eve->close_work); | |
318 | event_found = 1; | |
319 | break; | |
320 | } | |
321 | } | |
322 | if (!event_found) | |
aba25a3e | 323 | pr_err("ucma_removal_event_handler: warning: connect request event wasn't found\n"); |
e1c30298 YH |
324 | } |
325 | ||
75216638 SH |
326 | static int ucma_event_handler(struct rdma_cm_id *cm_id, |
327 | struct rdma_cm_event *event) | |
328 | { | |
329 | struct ucma_event *uevent; | |
330 | struct ucma_context *ctx = cm_id->context; | |
331 | int ret = 0; | |
332 | ||
333 | uevent = kzalloc(sizeof(*uevent), GFP_KERNEL); | |
334 | if (!uevent) | |
335 | return event->event == RDMA_CM_EVENT_CONNECT_REQUEST; | |
336 | ||
418edaab | 337 | mutex_lock(&ctx->file->mut); |
75216638 SH |
338 | uevent->cm_id = cm_id; |
339 | ucma_set_event_context(ctx, event, uevent); | |
340 | uevent->resp.event = event->event; | |
341 | uevent->resp.status = event->status; | |
638ef7a6 | 342 | if (cm_id->qp_type == IB_QPT_UD) |
d541e455 DC |
343 | ucma_copy_ud_event(cm_id->device, &uevent->resp.param.ud, |
344 | &event->param.ud); | |
75216638 SH |
345 | else |
346 | ucma_copy_conn_event(&uevent->resp.param.conn, | |
347 | &event->param.conn); | |
348 | ||
75216638 SH |
349 | if (event->event == RDMA_CM_EVENT_CONNECT_REQUEST) { |
350 | if (!ctx->backlog) { | |
3492856e | 351 | ret = -ENOMEM; |
30a5ec98 | 352 | kfree(uevent); |
75216638 SH |
353 | goto out; |
354 | } | |
355 | ctx->backlog--; | |
c6b21824 | 356 | } else if (!ctx->uid || ctx->cm_id != cm_id) { |
0cefcf0b SH |
357 | /* |
358 | * We ignore events for new connections until userspace has set | |
359 | * their context. This can only happen if an error occurs on a | |
360 | * new connection before the user accepts it. This is okay, | |
e1c30298 YH |
361 | * since the accept will just fail later. However, we do need |
362 | * to release the underlying HW resources in case of a device | |
363 | * removal event. | |
0cefcf0b | 364 | */ |
e1c30298 YH |
365 | if (event->event == RDMA_CM_EVENT_DEVICE_REMOVAL) |
366 | ucma_removal_event_handler(cm_id); | |
367 | ||
0cefcf0b SH |
368 | kfree(uevent); |
369 | goto out; | |
75216638 | 370 | } |
0cefcf0b | 371 | |
75216638 SH |
372 | list_add_tail(&uevent->list, &ctx->file->event_list); |
373 | wake_up_interruptible(&ctx->file->poll_wait); | |
e1c30298 YH |
374 | if (event->event == RDMA_CM_EVENT_DEVICE_REMOVAL) |
375 | ucma_removal_event_handler(cm_id); | |
75216638 SH |
376 | out: |
377 | mutex_unlock(&ctx->file->mut); | |
378 | return ret; | |
379 | } | |
380 | ||
381 | static ssize_t ucma_get_event(struct ucma_file *file, const char __user *inbuf, | |
382 | int in_len, int out_len) | |
383 | { | |
384 | struct ucma_context *ctx; | |
385 | struct rdma_ucm_get_event cmd; | |
386 | struct ucma_event *uevent; | |
387 | int ret = 0; | |
75216638 SH |
388 | |
389 | if (out_len < sizeof uevent->resp) | |
390 | return -ENOSPC; | |
391 | ||
392 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
393 | return -EFAULT; | |
394 | ||
395 | mutex_lock(&file->mut); | |
396 | while (list_empty(&file->event_list)) { | |
d92f7644 | 397 | mutex_unlock(&file->mut); |
75216638 | 398 | |
d92f7644 SH |
399 | if (file->filp->f_flags & O_NONBLOCK) |
400 | return -EAGAIN; | |
401 | ||
402 | if (wait_event_interruptible(file->poll_wait, | |
403 | !list_empty(&file->event_list))) | |
404 | return -ERESTARTSYS; | |
75216638 | 405 | |
75216638 | 406 | mutex_lock(&file->mut); |
75216638 SH |
407 | } |
408 | ||
75216638 SH |
409 | uevent = list_entry(file->event_list.next, struct ucma_event, list); |
410 | ||
411 | if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) { | |
412 | ctx = ucma_alloc_ctx(file); | |
413 | if (!ctx) { | |
414 | ret = -ENOMEM; | |
415 | goto done; | |
416 | } | |
417 | uevent->ctx->backlog++; | |
418 | ctx->cm_id = uevent->cm_id; | |
419 | ctx->cm_id->context = ctx; | |
420 | uevent->resp.id = ctx->id; | |
421 | } | |
422 | ||
423 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
424 | &uevent->resp, sizeof uevent->resp)) { | |
425 | ret = -EFAULT; | |
426 | goto done; | |
427 | } | |
428 | ||
429 | list_del(&uevent->list); | |
430 | uevent->ctx->events_reported++; | |
c8f6a362 SH |
431 | if (uevent->mc) |
432 | uevent->mc->events_reported++; | |
75216638 SH |
433 | kfree(uevent); |
434 | done: | |
435 | mutex_unlock(&file->mut); | |
436 | return ret; | |
437 | } | |
438 | ||
b26f9b99 SH |
439 | static int ucma_get_qp_type(struct rdma_ucm_create_id *cmd, enum ib_qp_type *qp_type) |
440 | { | |
441 | switch (cmd->ps) { | |
442 | case RDMA_PS_TCP: | |
443 | *qp_type = IB_QPT_RC; | |
444 | return 0; | |
445 | case RDMA_PS_UDP: | |
446 | case RDMA_PS_IPOIB: | |
447 | *qp_type = IB_QPT_UD; | |
448 | return 0; | |
638ef7a6 SH |
449 | case RDMA_PS_IB: |
450 | *qp_type = cmd->qp_type; | |
451 | return 0; | |
b26f9b99 SH |
452 | default: |
453 | return -EINVAL; | |
454 | } | |
455 | } | |
456 | ||
457 | static ssize_t ucma_create_id(struct ucma_file *file, const char __user *inbuf, | |
458 | int in_len, int out_len) | |
75216638 SH |
459 | { |
460 | struct rdma_ucm_create_id cmd; | |
461 | struct rdma_ucm_create_id_resp resp; | |
462 | struct ucma_context *ctx; | |
2cd09c40 | 463 | struct rdma_cm_id *cm_id; |
b26f9b99 | 464 | enum ib_qp_type qp_type; |
75216638 SH |
465 | int ret; |
466 | ||
467 | if (out_len < sizeof(resp)) | |
468 | return -ENOSPC; | |
469 | ||
470 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
471 | return -EFAULT; | |
472 | ||
b26f9b99 SH |
473 | ret = ucma_get_qp_type(&cmd, &qp_type); |
474 | if (ret) | |
475 | return ret; | |
476 | ||
75216638 SH |
477 | mutex_lock(&file->mut); |
478 | ctx = ucma_alloc_ctx(file); | |
479 | mutex_unlock(&file->mut); | |
480 | if (!ctx) | |
481 | return -ENOMEM; | |
482 | ||
483 | ctx->uid = cmd.uid; | |
2cd09c40 LR |
484 | cm_id = rdma_create_id(current->nsproxy->net_ns, |
485 | ucma_event_handler, ctx, cmd.ps, qp_type); | |
486 | if (IS_ERR(cm_id)) { | |
487 | ret = PTR_ERR(cm_id); | |
75216638 SH |
488 | goto err1; |
489 | } | |
490 | ||
491 | resp.id = ctx->id; | |
492 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
493 | &resp, sizeof(resp))) { | |
494 | ret = -EFAULT; | |
495 | goto err2; | |
496 | } | |
2cd09c40 LR |
497 | |
498 | ctx->cm_id = cm_id; | |
75216638 SH |
499 | return 0; |
500 | ||
501 | err2: | |
2cd09c40 | 502 | rdma_destroy_id(cm_id); |
75216638 SH |
503 | err1: |
504 | mutex_lock(&mut); | |
505 | idr_remove(&ctx_idr, ctx->id); | |
506 | mutex_unlock(&mut); | |
c719da05 LR |
507 | mutex_lock(&file->mut); |
508 | list_del(&ctx->list); | |
509 | mutex_unlock(&file->mut); | |
75216638 SH |
510 | kfree(ctx); |
511 | return ret; | |
512 | } | |
513 | ||
c8f6a362 SH |
514 | static void ucma_cleanup_multicast(struct ucma_context *ctx) |
515 | { | |
516 | struct ucma_multicast *mc, *tmp; | |
517 | ||
518 | mutex_lock(&mut); | |
519 | list_for_each_entry_safe(mc, tmp, &ctx->mc_list, list) { | |
520 | list_del(&mc->list); | |
521 | idr_remove(&multicast_idr, mc->id); | |
522 | kfree(mc); | |
523 | } | |
524 | mutex_unlock(&mut); | |
525 | } | |
526 | ||
c8f6a362 SH |
527 | static void ucma_cleanup_mc_events(struct ucma_multicast *mc) |
528 | { | |
529 | struct ucma_event *uevent, *tmp; | |
530 | ||
531 | list_for_each_entry_safe(uevent, tmp, &mc->ctx->file->event_list, list) { | |
532 | if (uevent->mc != mc) | |
533 | continue; | |
534 | ||
535 | list_del(&uevent->list); | |
536 | kfree(uevent); | |
537 | } | |
538 | } | |
539 | ||
186834b5 | 540 | /* |
e1c30298 YH |
541 | * ucma_free_ctx is called after the underlying rdma CM-ID is destroyed. At |
542 | * this point, no new events will be reported from the hardware. However, we | |
543 | * still need to cleanup the UCMA context for this ID. Specifically, there | |
544 | * might be events that have not yet been consumed by the user space software. | |
545 | * These might include pending connect requests which we have not completed | |
546 | * processing. We cannot call rdma_destroy_id while holding the lock of the | |
547 | * context (file->mut), as it might cause a deadlock. We therefore extract all | |
548 | * relevant events from the context pending events list while holding the | |
549 | * mutex. After that we release them as needed. | |
186834b5 | 550 | */ |
75216638 SH |
551 | static int ucma_free_ctx(struct ucma_context *ctx) |
552 | { | |
553 | int events_reported; | |
186834b5 HS |
554 | struct ucma_event *uevent, *tmp; |
555 | LIST_HEAD(list); | |
75216638 | 556 | |
75216638 | 557 | |
c8f6a362 SH |
558 | ucma_cleanup_multicast(ctx); |
559 | ||
75216638 SH |
560 | /* Cleanup events not yet reported to the user. */ |
561 | mutex_lock(&ctx->file->mut); | |
186834b5 HS |
562 | list_for_each_entry_safe(uevent, tmp, &ctx->file->event_list, list) { |
563 | if (uevent->ctx == ctx) | |
564 | list_move_tail(&uevent->list, &list); | |
565 | } | |
75216638 SH |
566 | list_del(&ctx->list); |
567 | mutex_unlock(&ctx->file->mut); | |
568 | ||
186834b5 HS |
569 | list_for_each_entry_safe(uevent, tmp, &list, list) { |
570 | list_del(&uevent->list); | |
571 | if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) | |
572 | rdma_destroy_id(uevent->cm_id); | |
573 | kfree(uevent); | |
574 | } | |
575 | ||
75216638 SH |
576 | events_reported = ctx->events_reported; |
577 | kfree(ctx); | |
578 | return events_reported; | |
579 | } | |
580 | ||
581 | static ssize_t ucma_destroy_id(struct ucma_file *file, const char __user *inbuf, | |
582 | int in_len, int out_len) | |
583 | { | |
584 | struct rdma_ucm_destroy_id cmd; | |
585 | struct rdma_ucm_destroy_id_resp resp; | |
586 | struct ucma_context *ctx; | |
587 | int ret = 0; | |
588 | ||
589 | if (out_len < sizeof(resp)) | |
590 | return -ENOSPC; | |
591 | ||
592 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
593 | return -EFAULT; | |
594 | ||
595 | mutex_lock(&mut); | |
596 | ctx = _ucma_find_context(cmd.id, file); | |
597 | if (!IS_ERR(ctx)) | |
598 | idr_remove(&ctx_idr, ctx->id); | |
599 | mutex_unlock(&mut); | |
600 | ||
601 | if (IS_ERR(ctx)) | |
602 | return PTR_ERR(ctx); | |
603 | ||
e1c30298 YH |
604 | mutex_lock(&ctx->file->mut); |
605 | ctx->destroying = 1; | |
606 | mutex_unlock(&ctx->file->mut); | |
607 | ||
608 | flush_workqueue(ctx->file->close_wq); | |
609 | /* At this point it's guaranteed that there is no inflight | |
610 | * closing task */ | |
611 | mutex_lock(&mut); | |
612 | if (!ctx->closing) { | |
613 | mutex_unlock(&mut); | |
614 | ucma_put_ctx(ctx); | |
615 | wait_for_completion(&ctx->comp); | |
616 | rdma_destroy_id(ctx->cm_id); | |
617 | } else { | |
618 | mutex_unlock(&mut); | |
619 | } | |
75216638 | 620 | |
e1c30298 | 621 | resp.events_reported = ucma_free_ctx(ctx); |
75216638 SH |
622 | if (copy_to_user((void __user *)(unsigned long)cmd.response, |
623 | &resp, sizeof(resp))) | |
624 | ret = -EFAULT; | |
625 | ||
626 | return ret; | |
627 | } | |
628 | ||
05ad9457 | 629 | static ssize_t ucma_bind_ip(struct ucma_file *file, const char __user *inbuf, |
75216638 SH |
630 | int in_len, int out_len) |
631 | { | |
05ad9457 | 632 | struct rdma_ucm_bind_ip cmd; |
75216638 SH |
633 | struct ucma_context *ctx; |
634 | int ret; | |
635 | ||
636 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
637 | return -EFAULT; | |
638 | ||
2bd5852b RD |
639 | if (!rdma_addr_size_in6(&cmd.addr)) |
640 | return -EINVAL; | |
641 | ||
75216638 SH |
642 | ctx = ucma_get_ctx(file, cmd.id); |
643 | if (IS_ERR(ctx)) | |
644 | return PTR_ERR(ctx); | |
645 | ||
646 | ret = rdma_bind_addr(ctx->cm_id, (struct sockaddr *) &cmd.addr); | |
647 | ucma_put_ctx(ctx); | |
648 | return ret; | |
649 | } | |
650 | ||
eebe4c3a SH |
651 | static ssize_t ucma_bind(struct ucma_file *file, const char __user *inbuf, |
652 | int in_len, int out_len) | |
653 | { | |
654 | struct rdma_ucm_bind cmd; | |
eebe4c3a SH |
655 | struct ucma_context *ctx; |
656 | int ret; | |
657 | ||
658 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
659 | return -EFAULT; | |
660 | ||
2bd5852b RD |
661 | if (cmd.reserved || !cmd.addr_size || |
662 | cmd.addr_size != rdma_addr_size_kss(&cmd.addr)) | |
eebe4c3a SH |
663 | return -EINVAL; |
664 | ||
665 | ctx = ucma_get_ctx(file, cmd.id); | |
666 | if (IS_ERR(ctx)) | |
667 | return PTR_ERR(ctx); | |
668 | ||
2bd5852b | 669 | ret = rdma_bind_addr(ctx->cm_id, (struct sockaddr *) &cmd.addr); |
eebe4c3a SH |
670 | ucma_put_ctx(ctx); |
671 | return ret; | |
672 | } | |
673 | ||
05ad9457 SH |
674 | static ssize_t ucma_resolve_ip(struct ucma_file *file, |
675 | const char __user *inbuf, | |
676 | int in_len, int out_len) | |
75216638 | 677 | { |
05ad9457 | 678 | struct rdma_ucm_resolve_ip cmd; |
75216638 SH |
679 | struct ucma_context *ctx; |
680 | int ret; | |
681 | ||
682 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
683 | return -EFAULT; | |
684 | ||
1e08841c | 685 | if ((cmd.src_addr.sin6_family && !rdma_addr_size_in6(&cmd.src_addr)) || |
2bd5852b | 686 | !rdma_addr_size_in6(&cmd.dst_addr)) |
8670f117 LR |
687 | return -EINVAL; |
688 | ||
75216638 SH |
689 | ctx = ucma_get_ctx(file, cmd.id); |
690 | if (IS_ERR(ctx)) | |
691 | return PTR_ERR(ctx); | |
692 | ||
2bd5852b RD |
693 | ret = rdma_resolve_addr(ctx->cm_id, (struct sockaddr *) &cmd.src_addr, |
694 | (struct sockaddr *) &cmd.dst_addr, cmd.timeout_ms); | |
75216638 SH |
695 | ucma_put_ctx(ctx); |
696 | return ret; | |
697 | } | |
698 | ||
209cf2a7 SH |
699 | static ssize_t ucma_resolve_addr(struct ucma_file *file, |
700 | const char __user *inbuf, | |
701 | int in_len, int out_len) | |
702 | { | |
703 | struct rdma_ucm_resolve_addr cmd; | |
209cf2a7 SH |
704 | struct ucma_context *ctx; |
705 | int ret; | |
706 | ||
707 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
708 | return -EFAULT; | |
709 | ||
2bd5852b RD |
710 | if (cmd.reserved || |
711 | (cmd.src_size && (cmd.src_size != rdma_addr_size_kss(&cmd.src_addr))) || | |
712 | !cmd.dst_size || (cmd.dst_size != rdma_addr_size_kss(&cmd.dst_addr))) | |
209cf2a7 SH |
713 | return -EINVAL; |
714 | ||
715 | ctx = ucma_get_ctx(file, cmd.id); | |
716 | if (IS_ERR(ctx)) | |
717 | return PTR_ERR(ctx); | |
718 | ||
2bd5852b RD |
719 | ret = rdma_resolve_addr(ctx->cm_id, (struct sockaddr *) &cmd.src_addr, |
720 | (struct sockaddr *) &cmd.dst_addr, cmd.timeout_ms); | |
209cf2a7 SH |
721 | ucma_put_ctx(ctx); |
722 | return ret; | |
723 | } | |
724 | ||
75216638 SH |
725 | static ssize_t ucma_resolve_route(struct ucma_file *file, |
726 | const char __user *inbuf, | |
727 | int in_len, int out_len) | |
728 | { | |
729 | struct rdma_ucm_resolve_route cmd; | |
730 | struct ucma_context *ctx; | |
731 | int ret; | |
732 | ||
733 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
734 | return -EFAULT; | |
735 | ||
736 | ctx = ucma_get_ctx(file, cmd.id); | |
737 | if (IS_ERR(ctx)) | |
738 | return PTR_ERR(ctx); | |
739 | ||
740 | ret = rdma_resolve_route(ctx->cm_id, cmd.timeout_ms); | |
741 | ucma_put_ctx(ctx); | |
742 | return ret; | |
743 | } | |
744 | ||
745 | static void ucma_copy_ib_route(struct rdma_ucm_query_route_resp *resp, | |
746 | struct rdma_route *route) | |
747 | { | |
748 | struct rdma_dev_addr *dev_addr; | |
749 | ||
750 | resp->num_paths = route->num_paths; | |
751 | switch (route->num_paths) { | |
752 | case 0: | |
753 | dev_addr = &route->addr.dev_addr; | |
6f8372b6 SH |
754 | rdma_addr_get_dgid(dev_addr, |
755 | (union ib_gid *) &resp->ib_route[0].dgid); | |
756 | rdma_addr_get_sgid(dev_addr, | |
757 | (union ib_gid *) &resp->ib_route[0].sgid); | |
75216638 SH |
758 | resp->ib_route[0].pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); |
759 | break; | |
760 | case 2: | |
761 | ib_copy_path_rec_to_user(&resp->ib_route[1], | |
762 | &route->path_rec[1]); | |
763 | /* fall through */ | |
764 | case 1: | |
765 | ib_copy_path_rec_to_user(&resp->ib_route[0], | |
766 | &route->path_rec[0]); | |
767 | break; | |
768 | default: | |
769 | break; | |
770 | } | |
771 | } | |
772 | ||
3c86aa70 EC |
773 | static void ucma_copy_iboe_route(struct rdma_ucm_query_route_resp *resp, |
774 | struct rdma_route *route) | |
775 | { | |
3c86aa70 EC |
776 | |
777 | resp->num_paths = route->num_paths; | |
778 | switch (route->num_paths) { | |
779 | case 0: | |
7b85627b MS |
780 | rdma_ip2gid((struct sockaddr *)&route->addr.dst_addr, |
781 | (union ib_gid *)&resp->ib_route[0].dgid); | |
782 | rdma_ip2gid((struct sockaddr *)&route->addr.src_addr, | |
783 | (union ib_gid *)&resp->ib_route[0].sgid); | |
3c86aa70 EC |
784 | resp->ib_route[0].pkey = cpu_to_be16(0xffff); |
785 | break; | |
786 | case 2: | |
787 | ib_copy_path_rec_to_user(&resp->ib_route[1], | |
788 | &route->path_rec[1]); | |
789 | /* fall through */ | |
790 | case 1: | |
791 | ib_copy_path_rec_to_user(&resp->ib_route[0], | |
792 | &route->path_rec[0]); | |
793 | break; | |
794 | default: | |
795 | break; | |
796 | } | |
797 | } | |
798 | ||
e86f8b06 SW |
799 | static void ucma_copy_iw_route(struct rdma_ucm_query_route_resp *resp, |
800 | struct rdma_route *route) | |
801 | { | |
802 | struct rdma_dev_addr *dev_addr; | |
803 | ||
804 | dev_addr = &route->addr.dev_addr; | |
805 | rdma_addr_get_dgid(dev_addr, (union ib_gid *) &resp->ib_route[0].dgid); | |
806 | rdma_addr_get_sgid(dev_addr, (union ib_gid *) &resp->ib_route[0].sgid); | |
807 | } | |
808 | ||
75216638 SH |
809 | static ssize_t ucma_query_route(struct ucma_file *file, |
810 | const char __user *inbuf, | |
811 | int in_len, int out_len) | |
812 | { | |
ee7aed45 | 813 | struct rdma_ucm_query cmd; |
75216638 SH |
814 | struct rdma_ucm_query_route_resp resp; |
815 | struct ucma_context *ctx; | |
816 | struct sockaddr *addr; | |
817 | int ret = 0; | |
818 | ||
819 | if (out_len < sizeof(resp)) | |
820 | return -ENOSPC; | |
821 | ||
822 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
823 | return -EFAULT; | |
824 | ||
825 | ctx = ucma_get_ctx(file, cmd.id); | |
826 | if (IS_ERR(ctx)) | |
827 | return PTR_ERR(ctx); | |
828 | ||
829 | memset(&resp, 0, sizeof resp); | |
3f446754 | 830 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.src_addr; |
75216638 SH |
831 | memcpy(&resp.src_addr, addr, addr->sa_family == AF_INET ? |
832 | sizeof(struct sockaddr_in) : | |
833 | sizeof(struct sockaddr_in6)); | |
3f446754 | 834 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.dst_addr; |
75216638 SH |
835 | memcpy(&resp.dst_addr, addr, addr->sa_family == AF_INET ? |
836 | sizeof(struct sockaddr_in) : | |
837 | sizeof(struct sockaddr_in6)); | |
838 | if (!ctx->cm_id->device) | |
839 | goto out; | |
840 | ||
9cda779c | 841 | resp.node_guid = (__force __u64) ctx->cm_id->device->node_guid; |
75216638 | 842 | resp.port_num = ctx->cm_id->port_num; |
c72f2189 | 843 | |
fe53ba2f | 844 | if (rdma_cap_ib_sa(ctx->cm_id->device, ctx->cm_id->port_num)) |
c72f2189 | 845 | ucma_copy_ib_route(&resp, &ctx->cm_id->route); |
5d9fb044 | 846 | else if (rdma_protocol_roce(ctx->cm_id->device, ctx->cm_id->port_num)) |
c72f2189 MW |
847 | ucma_copy_iboe_route(&resp, &ctx->cm_id->route); |
848 | else if (rdma_protocol_iwarp(ctx->cm_id->device, ctx->cm_id->port_num)) | |
e86f8b06 | 849 | ucma_copy_iw_route(&resp, &ctx->cm_id->route); |
75216638 SH |
850 | |
851 | out: | |
852 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
853 | &resp, sizeof(resp))) | |
854 | ret = -EFAULT; | |
855 | ||
856 | ucma_put_ctx(ctx); | |
857 | return ret; | |
858 | } | |
859 | ||
ee7aed45 SH |
860 | static void ucma_query_device_addr(struct rdma_cm_id *cm_id, |
861 | struct rdma_ucm_query_addr_resp *resp) | |
862 | { | |
863 | if (!cm_id->device) | |
864 | return; | |
865 | ||
866 | resp->node_guid = (__force __u64) cm_id->device->node_guid; | |
867 | resp->port_num = cm_id->port_num; | |
868 | resp->pkey = (__force __u16) cpu_to_be16( | |
869 | ib_addr_get_pkey(&cm_id->route.addr.dev_addr)); | |
870 | } | |
871 | ||
872 | static ssize_t ucma_query_addr(struct ucma_context *ctx, | |
873 | void __user *response, int out_len) | |
874 | { | |
875 | struct rdma_ucm_query_addr_resp resp; | |
876 | struct sockaddr *addr; | |
877 | int ret = 0; | |
878 | ||
879 | if (out_len < sizeof(resp)) | |
880 | return -ENOSPC; | |
881 | ||
882 | memset(&resp, 0, sizeof resp); | |
883 | ||
884 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.src_addr; | |
885 | resp.src_size = rdma_addr_size(addr); | |
886 | memcpy(&resp.src_addr, addr, resp.src_size); | |
887 | ||
888 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.dst_addr; | |
889 | resp.dst_size = rdma_addr_size(addr); | |
890 | memcpy(&resp.dst_addr, addr, resp.dst_size); | |
891 | ||
892 | ucma_query_device_addr(ctx->cm_id, &resp); | |
893 | ||
894 | if (copy_to_user(response, &resp, sizeof(resp))) | |
895 | ret = -EFAULT; | |
896 | ||
897 | return ret; | |
898 | } | |
899 | ||
ac53b264 SH |
900 | static ssize_t ucma_query_path(struct ucma_context *ctx, |
901 | void __user *response, int out_len) | |
902 | { | |
903 | struct rdma_ucm_query_path_resp *resp; | |
904 | int i, ret = 0; | |
905 | ||
906 | if (out_len < sizeof(*resp)) | |
907 | return -ENOSPC; | |
908 | ||
909 | resp = kzalloc(out_len, GFP_KERNEL); | |
910 | if (!resp) | |
911 | return -ENOMEM; | |
912 | ||
913 | resp->num_paths = ctx->cm_id->route.num_paths; | |
914 | for (i = 0, out_len -= sizeof(*resp); | |
915 | i < resp->num_paths && out_len > sizeof(struct ib_path_rec_data); | |
916 | i++, out_len -= sizeof(struct ib_path_rec_data)) { | |
57520751 | 917 | struct sa_path_rec *rec = &ctx->cm_id->route.path_rec[i]; |
ac53b264 SH |
918 | |
919 | resp->path_data[i].flags = IB_PATH_GMP | IB_PATH_PRIMARY | | |
920 | IB_PATH_BIDIRECTIONAL; | |
b85baf74 | 921 | if (rec->rec_type == SA_PATH_REC_TYPE_OPA) { |
57520751 DC |
922 | struct sa_path_rec ib; |
923 | ||
924 | sa_convert_path_opa_to_ib(&ib, rec); | |
925 | ib_sa_pack_path(&ib, &resp->path_data[i].path_rec); | |
b85baf74 PP |
926 | |
927 | } else { | |
928 | ib_sa_pack_path(rec, &resp->path_data[i].path_rec); | |
57520751 | 929 | } |
ac53b264 SH |
930 | } |
931 | ||
932 | if (copy_to_user(response, resp, | |
933 | sizeof(*resp) + (i * sizeof(struct ib_path_rec_data)))) | |
934 | ret = -EFAULT; | |
935 | ||
936 | kfree(resp); | |
937 | return ret; | |
938 | } | |
939 | ||
edaa7a55 SH |
940 | static ssize_t ucma_query_gid(struct ucma_context *ctx, |
941 | void __user *response, int out_len) | |
942 | { | |
943 | struct rdma_ucm_query_addr_resp resp; | |
944 | struct sockaddr_ib *addr; | |
945 | int ret = 0; | |
946 | ||
947 | if (out_len < sizeof(resp)) | |
948 | return -ENOSPC; | |
949 | ||
950 | memset(&resp, 0, sizeof resp); | |
951 | ||
952 | ucma_query_device_addr(ctx->cm_id, &resp); | |
953 | ||
954 | addr = (struct sockaddr_ib *) &resp.src_addr; | |
955 | resp.src_size = sizeof(*addr); | |
956 | if (ctx->cm_id->route.addr.src_addr.ss_family == AF_IB) { | |
957 | memcpy(addr, &ctx->cm_id->route.addr.src_addr, resp.src_size); | |
958 | } else { | |
959 | addr->sib_family = AF_IB; | |
960 | addr->sib_pkey = (__force __be16) resp.pkey; | |
961 | rdma_addr_get_sgid(&ctx->cm_id->route.addr.dev_addr, | |
962 | (union ib_gid *) &addr->sib_addr); | |
963 | addr->sib_sid = rdma_get_service_id(ctx->cm_id, (struct sockaddr *) | |
964 | &ctx->cm_id->route.addr.src_addr); | |
965 | } | |
966 | ||
967 | addr = (struct sockaddr_ib *) &resp.dst_addr; | |
968 | resp.dst_size = sizeof(*addr); | |
969 | if (ctx->cm_id->route.addr.dst_addr.ss_family == AF_IB) { | |
970 | memcpy(addr, &ctx->cm_id->route.addr.dst_addr, resp.dst_size); | |
971 | } else { | |
972 | addr->sib_family = AF_IB; | |
973 | addr->sib_pkey = (__force __be16) resp.pkey; | |
974 | rdma_addr_get_dgid(&ctx->cm_id->route.addr.dev_addr, | |
975 | (union ib_gid *) &addr->sib_addr); | |
976 | addr->sib_sid = rdma_get_service_id(ctx->cm_id, (struct sockaddr *) | |
977 | &ctx->cm_id->route.addr.dst_addr); | |
978 | } | |
979 | ||
980 | if (copy_to_user(response, &resp, sizeof(resp))) | |
981 | ret = -EFAULT; | |
982 | ||
983 | return ret; | |
984 | } | |
985 | ||
ee7aed45 SH |
986 | static ssize_t ucma_query(struct ucma_file *file, |
987 | const char __user *inbuf, | |
988 | int in_len, int out_len) | |
989 | { | |
990 | struct rdma_ucm_query cmd; | |
991 | struct ucma_context *ctx; | |
992 | void __user *response; | |
993 | int ret; | |
994 | ||
995 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
996 | return -EFAULT; | |
997 | ||
998 | response = (void __user *)(unsigned long) cmd.response; | |
999 | ctx = ucma_get_ctx(file, cmd.id); | |
1000 | if (IS_ERR(ctx)) | |
1001 | return PTR_ERR(ctx); | |
1002 | ||
1003 | switch (cmd.option) { | |
1004 | case RDMA_USER_CM_QUERY_ADDR: | |
1005 | ret = ucma_query_addr(ctx, response, out_len); | |
1006 | break; | |
ac53b264 SH |
1007 | case RDMA_USER_CM_QUERY_PATH: |
1008 | ret = ucma_query_path(ctx, response, out_len); | |
1009 | break; | |
edaa7a55 SH |
1010 | case RDMA_USER_CM_QUERY_GID: |
1011 | ret = ucma_query_gid(ctx, response, out_len); | |
1012 | break; | |
ee7aed45 SH |
1013 | default: |
1014 | ret = -ENOSYS; | |
1015 | break; | |
1016 | } | |
1017 | ||
1018 | ucma_put_ctx(ctx); | |
1019 | return ret; | |
1020 | } | |
1021 | ||
5c438135 SH |
1022 | static void ucma_copy_conn_param(struct rdma_cm_id *id, |
1023 | struct rdma_conn_param *dst, | |
75216638 SH |
1024 | struct rdma_ucm_conn_param *src) |
1025 | { | |
1026 | dst->private_data = src->private_data; | |
1027 | dst->private_data_len = src->private_data_len; | |
1028 | dst->responder_resources =src->responder_resources; | |
1029 | dst->initiator_depth = src->initiator_depth; | |
1030 | dst->flow_control = src->flow_control; | |
1031 | dst->retry_count = src->retry_count; | |
1032 | dst->rnr_retry_count = src->rnr_retry_count; | |
1033 | dst->srq = src->srq; | |
1034 | dst->qp_num = src->qp_num; | |
5c438135 | 1035 | dst->qkey = (id->route.addr.src_addr.ss_family == AF_IB) ? src->qkey : 0; |
75216638 SH |
1036 | } |
1037 | ||
1038 | static ssize_t ucma_connect(struct ucma_file *file, const char __user *inbuf, | |
1039 | int in_len, int out_len) | |
1040 | { | |
1041 | struct rdma_ucm_connect cmd; | |
1042 | struct rdma_conn_param conn_param; | |
1043 | struct ucma_context *ctx; | |
1044 | int ret; | |
1045 | ||
1046 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1047 | return -EFAULT; | |
1048 | ||
1049 | if (!cmd.conn_param.valid) | |
1050 | return -EINVAL; | |
1051 | ||
1052 | ctx = ucma_get_ctx(file, cmd.id); | |
1053 | if (IS_ERR(ctx)) | |
1054 | return PTR_ERR(ctx); | |
1055 | ||
5c438135 | 1056 | ucma_copy_conn_param(ctx->cm_id, &conn_param, &cmd.conn_param); |
75216638 SH |
1057 | ret = rdma_connect(ctx->cm_id, &conn_param); |
1058 | ucma_put_ctx(ctx); | |
1059 | return ret; | |
1060 | } | |
1061 | ||
1062 | static ssize_t ucma_listen(struct ucma_file *file, const char __user *inbuf, | |
1063 | int in_len, int out_len) | |
1064 | { | |
1065 | struct rdma_ucm_listen cmd; | |
1066 | struct ucma_context *ctx; | |
1067 | int ret; | |
1068 | ||
1069 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1070 | return -EFAULT; | |
1071 | ||
1072 | ctx = ucma_get_ctx(file, cmd.id); | |
1073 | if (IS_ERR(ctx)) | |
1074 | return PTR_ERR(ctx); | |
1075 | ||
97cb7e40 SW |
1076 | ctx->backlog = cmd.backlog > 0 && cmd.backlog < max_backlog ? |
1077 | cmd.backlog : max_backlog; | |
75216638 SH |
1078 | ret = rdma_listen(ctx->cm_id, ctx->backlog); |
1079 | ucma_put_ctx(ctx); | |
1080 | return ret; | |
1081 | } | |
1082 | ||
1083 | static ssize_t ucma_accept(struct ucma_file *file, const char __user *inbuf, | |
1084 | int in_len, int out_len) | |
1085 | { | |
1086 | struct rdma_ucm_accept cmd; | |
1087 | struct rdma_conn_param conn_param; | |
1088 | struct ucma_context *ctx; | |
1089 | int ret; | |
1090 | ||
1091 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1092 | return -EFAULT; | |
1093 | ||
1094 | ctx = ucma_get_ctx(file, cmd.id); | |
1095 | if (IS_ERR(ctx)) | |
1096 | return PTR_ERR(ctx); | |
1097 | ||
1098 | if (cmd.conn_param.valid) { | |
5c438135 | 1099 | ucma_copy_conn_param(ctx->cm_id, &conn_param, &cmd.conn_param); |
9ced69ca | 1100 | mutex_lock(&file->mut); |
75216638 | 1101 | ret = rdma_accept(ctx->cm_id, &conn_param); |
9ced69ca SH |
1102 | if (!ret) |
1103 | ctx->uid = cmd.uid; | |
1104 | mutex_unlock(&file->mut); | |
75216638 SH |
1105 | } else |
1106 | ret = rdma_accept(ctx->cm_id, NULL); | |
1107 | ||
1108 | ucma_put_ctx(ctx); | |
1109 | return ret; | |
1110 | } | |
1111 | ||
1112 | static ssize_t ucma_reject(struct ucma_file *file, const char __user *inbuf, | |
1113 | int in_len, int out_len) | |
1114 | { | |
1115 | struct rdma_ucm_reject cmd; | |
1116 | struct ucma_context *ctx; | |
1117 | int ret; | |
1118 | ||
1119 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1120 | return -EFAULT; | |
1121 | ||
1122 | ctx = ucma_get_ctx(file, cmd.id); | |
1123 | if (IS_ERR(ctx)) | |
1124 | return PTR_ERR(ctx); | |
1125 | ||
1126 | ret = rdma_reject(ctx->cm_id, cmd.private_data, cmd.private_data_len); | |
1127 | ucma_put_ctx(ctx); | |
1128 | return ret; | |
1129 | } | |
1130 | ||
1131 | static ssize_t ucma_disconnect(struct ucma_file *file, const char __user *inbuf, | |
1132 | int in_len, int out_len) | |
1133 | { | |
1134 | struct rdma_ucm_disconnect cmd; | |
1135 | struct ucma_context *ctx; | |
1136 | int ret; | |
1137 | ||
1138 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1139 | return -EFAULT; | |
1140 | ||
1141 | ctx = ucma_get_ctx(file, cmd.id); | |
1142 | if (IS_ERR(ctx)) | |
1143 | return PTR_ERR(ctx); | |
1144 | ||
1145 | ret = rdma_disconnect(ctx->cm_id); | |
1146 | ucma_put_ctx(ctx); | |
1147 | return ret; | |
1148 | } | |
1149 | ||
1150 | static ssize_t ucma_init_qp_attr(struct ucma_file *file, | |
1151 | const char __user *inbuf, | |
1152 | int in_len, int out_len) | |
1153 | { | |
1154 | struct rdma_ucm_init_qp_attr cmd; | |
1155 | struct ib_uverbs_qp_attr resp; | |
1156 | struct ucma_context *ctx; | |
1157 | struct ib_qp_attr qp_attr; | |
1158 | int ret; | |
1159 | ||
1160 | if (out_len < sizeof(resp)) | |
1161 | return -ENOSPC; | |
1162 | ||
1163 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1164 | return -EFAULT; | |
1165 | ||
3d691338 LR |
1166 | if (cmd.qp_state > IB_QPS_ERR) |
1167 | return -EINVAL; | |
1168 | ||
75216638 SH |
1169 | ctx = ucma_get_ctx(file, cmd.id); |
1170 | if (IS_ERR(ctx)) | |
1171 | return PTR_ERR(ctx); | |
1172 | ||
52c6bd22 LR |
1173 | if (!ctx->cm_id->device) { |
1174 | ret = -EINVAL; | |
1175 | goto out; | |
1176 | } | |
1177 | ||
75216638 SH |
1178 | resp.qp_attr_mask = 0; |
1179 | memset(&qp_attr, 0, sizeof qp_attr); | |
1180 | qp_attr.qp_state = cmd.qp_state; | |
1181 | ret = rdma_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask); | |
1182 | if (ret) | |
1183 | goto out; | |
1184 | ||
d541e455 | 1185 | ib_copy_qp_attr_to_user(ctx->cm_id->device, &resp, &qp_attr); |
75216638 SH |
1186 | if (copy_to_user((void __user *)(unsigned long)cmd.response, |
1187 | &resp, sizeof(resp))) | |
1188 | ret = -EFAULT; | |
1189 | ||
1190 | out: | |
1191 | ucma_put_ctx(ctx); | |
1192 | return ret; | |
1193 | } | |
1194 | ||
7ce86409 SH |
1195 | static int ucma_set_option_id(struct ucma_context *ctx, int optname, |
1196 | void *optval, size_t optlen) | |
1197 | { | |
1198 | int ret = 0; | |
1199 | ||
1200 | switch (optname) { | |
1201 | case RDMA_OPTION_ID_TOS: | |
1202 | if (optlen != sizeof(u8)) { | |
1203 | ret = -EINVAL; | |
1204 | break; | |
1205 | } | |
1206 | rdma_set_service_type(ctx->cm_id, *((u8 *) optval)); | |
1207 | break; | |
a9bb7912 HS |
1208 | case RDMA_OPTION_ID_REUSEADDR: |
1209 | if (optlen != sizeof(int)) { | |
1210 | ret = -EINVAL; | |
1211 | break; | |
1212 | } | |
1213 | ret = rdma_set_reuseaddr(ctx->cm_id, *((int *) optval) ? 1 : 0); | |
1214 | break; | |
68602120 SH |
1215 | case RDMA_OPTION_ID_AFONLY: |
1216 | if (optlen != sizeof(int)) { | |
1217 | ret = -EINVAL; | |
1218 | break; | |
1219 | } | |
1220 | ret = rdma_set_afonly(ctx->cm_id, *((int *) optval) ? 1 : 0); | |
1221 | break; | |
7ce86409 SH |
1222 | default: |
1223 | ret = -ENOSYS; | |
1224 | } | |
1225 | ||
1226 | return ret; | |
1227 | } | |
1228 | ||
a7ca1f00 SH |
1229 | static int ucma_set_ib_path(struct ucma_context *ctx, |
1230 | struct ib_path_rec_data *path_data, size_t optlen) | |
1231 | { | |
c2f8fc4e | 1232 | struct sa_path_rec sa_path; |
a7ca1f00 SH |
1233 | struct rdma_cm_event event; |
1234 | int ret; | |
1235 | ||
1236 | if (optlen % sizeof(*path_data)) | |
1237 | return -EINVAL; | |
1238 | ||
1239 | for (; optlen; optlen -= sizeof(*path_data), path_data++) { | |
1240 | if (path_data->flags == (IB_PATH_GMP | IB_PATH_PRIMARY | | |
1241 | IB_PATH_BIDIRECTIONAL)) | |
1242 | break; | |
1243 | } | |
1244 | ||
1245 | if (!optlen) | |
1246 | return -EINVAL; | |
1247 | ||
db740497 RD |
1248 | if (!ctx->cm_id->device) |
1249 | return -EINVAL; | |
1250 | ||
c2be9dc0 | 1251 | memset(&sa_path, 0, sizeof(sa_path)); |
c2be9dc0 | 1252 | |
57520751 | 1253 | sa_path.rec_type = SA_PATH_REC_TYPE_IB; |
a7ca1f00 | 1254 | ib_sa_unpack_path(path_data->path_rec, &sa_path); |
57520751 DC |
1255 | |
1256 | if (rdma_cap_opa_ah(ctx->cm_id->device, ctx->cm_id->port_num)) { | |
1257 | struct sa_path_rec opa; | |
1258 | ||
1259 | sa_convert_path_ib_to_opa(&opa, &sa_path); | |
1260 | ret = rdma_set_ib_paths(ctx->cm_id, &opa, 1); | |
1261 | } else { | |
1262 | ret = rdma_set_ib_paths(ctx->cm_id, &sa_path, 1); | |
1263 | } | |
a7ca1f00 SH |
1264 | if (ret) |
1265 | return ret; | |
1266 | ||
1267 | memset(&event, 0, sizeof event); | |
1268 | event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; | |
1269 | return ucma_event_handler(ctx->cm_id, &event); | |
1270 | } | |
1271 | ||
1272 | static int ucma_set_option_ib(struct ucma_context *ctx, int optname, | |
1273 | void *optval, size_t optlen) | |
1274 | { | |
1275 | int ret; | |
1276 | ||
1277 | switch (optname) { | |
1278 | case RDMA_OPTION_IB_PATH: | |
1279 | ret = ucma_set_ib_path(ctx, optval, optlen); | |
1280 | break; | |
1281 | default: | |
1282 | ret = -ENOSYS; | |
1283 | } | |
1284 | ||
1285 | return ret; | |
1286 | } | |
1287 | ||
7ce86409 SH |
1288 | static int ucma_set_option_level(struct ucma_context *ctx, int level, |
1289 | int optname, void *optval, size_t optlen) | |
1290 | { | |
1291 | int ret; | |
1292 | ||
1293 | switch (level) { | |
1294 | case RDMA_OPTION_ID: | |
1295 | ret = ucma_set_option_id(ctx, optname, optval, optlen); | |
1296 | break; | |
a7ca1f00 SH |
1297 | case RDMA_OPTION_IB: |
1298 | ret = ucma_set_option_ib(ctx, optname, optval, optlen); | |
1299 | break; | |
7ce86409 SH |
1300 | default: |
1301 | ret = -ENOSYS; | |
1302 | } | |
1303 | ||
1304 | return ret; | |
1305 | } | |
1306 | ||
1307 | static ssize_t ucma_set_option(struct ucma_file *file, const char __user *inbuf, | |
1308 | int in_len, int out_len) | |
1309 | { | |
1310 | struct rdma_ucm_set_option cmd; | |
1311 | struct ucma_context *ctx; | |
1312 | void *optval; | |
1313 | int ret; | |
1314 | ||
1315 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1316 | return -EFAULT; | |
1317 | ||
1318 | ctx = ucma_get_ctx(file, cmd.id); | |
1319 | if (IS_ERR(ctx)) | |
1320 | return PTR_ERR(ctx); | |
1321 | ||
8e763c73 | 1322 | if (unlikely(cmd.optlen > KMALLOC_MAX_SIZE)) |
d5ef3c65 LR |
1323 | return -EINVAL; |
1324 | ||
0764c76e RD |
1325 | optval = memdup_user((void __user *) (unsigned long) cmd.optval, |
1326 | cmd.optlen); | |
1327 | if (IS_ERR(optval)) { | |
1328 | ret = PTR_ERR(optval); | |
1329 | goto out; | |
7ce86409 SH |
1330 | } |
1331 | ||
1332 | ret = ucma_set_option_level(ctx, cmd.level, cmd.optname, optval, | |
1333 | cmd.optlen); | |
7ce86409 | 1334 | kfree(optval); |
0764c76e RD |
1335 | |
1336 | out: | |
7ce86409 SH |
1337 | ucma_put_ctx(ctx); |
1338 | return ret; | |
1339 | } | |
1340 | ||
75216638 SH |
1341 | static ssize_t ucma_notify(struct ucma_file *file, const char __user *inbuf, |
1342 | int in_len, int out_len) | |
1343 | { | |
1344 | struct rdma_ucm_notify cmd; | |
1345 | struct ucma_context *ctx; | |
3f1e41cc | 1346 | int ret = -EINVAL; |
75216638 SH |
1347 | |
1348 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1349 | return -EFAULT; | |
1350 | ||
1351 | ctx = ucma_get_ctx(file, cmd.id); | |
1352 | if (IS_ERR(ctx)) | |
1353 | return PTR_ERR(ctx); | |
1354 | ||
3f1e41cc LR |
1355 | if (ctx->cm_id->device) |
1356 | ret = rdma_notify(ctx->cm_id, (enum ib_event_type)cmd.event); | |
1357 | ||
75216638 SH |
1358 | ucma_put_ctx(ctx); |
1359 | return ret; | |
1360 | } | |
1361 | ||
5bc2b7b3 SH |
1362 | static ssize_t ucma_process_join(struct ucma_file *file, |
1363 | struct rdma_ucm_join_mcast *cmd, int out_len) | |
c8f6a362 | 1364 | { |
c8f6a362 SH |
1365 | struct rdma_ucm_create_id_resp resp; |
1366 | struct ucma_context *ctx; | |
1367 | struct ucma_multicast *mc; | |
5bc2b7b3 | 1368 | struct sockaddr *addr; |
c8f6a362 | 1369 | int ret; |
ab15c95a | 1370 | u8 join_state; |
c8f6a362 SH |
1371 | |
1372 | if (out_len < sizeof(resp)) | |
1373 | return -ENOSPC; | |
1374 | ||
5bc2b7b3 | 1375 | addr = (struct sockaddr *) &cmd->addr; |
1a3eff2b | 1376 | if (cmd->addr_size != rdma_addr_size(addr)) |
ab15c95a AV |
1377 | return -EINVAL; |
1378 | ||
1379 | if (cmd->join_flags == RDMA_MC_JOIN_FLAG_FULLMEMBER) | |
1380 | join_state = BIT(FULLMEMBER_JOIN); | |
1381 | else if (cmd->join_flags == RDMA_MC_JOIN_FLAG_SENDONLY_FULLMEMBER) | |
1382 | join_state = BIT(SENDONLY_FULLMEMBER_JOIN); | |
1383 | else | |
5bc2b7b3 | 1384 | return -EINVAL; |
c8f6a362 | 1385 | |
5bc2b7b3 | 1386 | ctx = ucma_get_ctx(file, cmd->id); |
c8f6a362 SH |
1387 | if (IS_ERR(ctx)) |
1388 | return PTR_ERR(ctx); | |
1389 | ||
1390 | mutex_lock(&file->mut); | |
1391 | mc = ucma_alloc_multicast(ctx); | |
6aea938f JB |
1392 | if (!mc) { |
1393 | ret = -ENOMEM; | |
c8f6a362 SH |
1394 | goto err1; |
1395 | } | |
ab15c95a | 1396 | mc->join_state = join_state; |
5bc2b7b3 SH |
1397 | mc->uid = cmd->uid; |
1398 | memcpy(&mc->addr, addr, cmd->addr_size); | |
ab15c95a AV |
1399 | ret = rdma_join_multicast(ctx->cm_id, (struct sockaddr *)&mc->addr, |
1400 | join_state, mc); | |
c8f6a362 SH |
1401 | if (ret) |
1402 | goto err2; | |
1403 | ||
1404 | resp.id = mc->id; | |
5bc2b7b3 | 1405 | if (copy_to_user((void __user *)(unsigned long) cmd->response, |
c8f6a362 SH |
1406 | &resp, sizeof(resp))) { |
1407 | ret = -EFAULT; | |
1408 | goto err3; | |
1409 | } | |
1410 | ||
390874d6 CW |
1411 | mutex_lock(&mut); |
1412 | idr_replace(&multicast_idr, mc, mc->id); | |
1413 | mutex_unlock(&mut); | |
1414 | ||
c8f6a362 SH |
1415 | mutex_unlock(&file->mut); |
1416 | ucma_put_ctx(ctx); | |
1417 | return 0; | |
1418 | ||
1419 | err3: | |
3f446754 | 1420 | rdma_leave_multicast(ctx->cm_id, (struct sockaddr *) &mc->addr); |
c8f6a362 SH |
1421 | ucma_cleanup_mc_events(mc); |
1422 | err2: | |
1423 | mutex_lock(&mut); | |
1424 | idr_remove(&multicast_idr, mc->id); | |
1425 | mutex_unlock(&mut); | |
1426 | list_del(&mc->list); | |
1427 | kfree(mc); | |
1428 | err1: | |
1429 | mutex_unlock(&file->mut); | |
1430 | ucma_put_ctx(ctx); | |
1431 | return ret; | |
1432 | } | |
1433 | ||
5bc2b7b3 SH |
1434 | static ssize_t ucma_join_ip_multicast(struct ucma_file *file, |
1435 | const char __user *inbuf, | |
1436 | int in_len, int out_len) | |
1437 | { | |
1438 | struct rdma_ucm_join_ip_mcast cmd; | |
1439 | struct rdma_ucm_join_mcast join_cmd; | |
1440 | ||
1441 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1442 | return -EFAULT; | |
1443 | ||
1444 | join_cmd.response = cmd.response; | |
1445 | join_cmd.uid = cmd.uid; | |
1446 | join_cmd.id = cmd.id; | |
2bd5852b | 1447 | join_cmd.addr_size = rdma_addr_size_in6(&cmd.addr); |
1a3eff2b LR |
1448 | if (!join_cmd.addr_size) |
1449 | return -EINVAL; | |
1450 | ||
ab15c95a | 1451 | join_cmd.join_flags = RDMA_MC_JOIN_FLAG_FULLMEMBER; |
5bc2b7b3 SH |
1452 | memcpy(&join_cmd.addr, &cmd.addr, join_cmd.addr_size); |
1453 | ||
1454 | return ucma_process_join(file, &join_cmd, out_len); | |
1455 | } | |
1456 | ||
1457 | static ssize_t ucma_join_multicast(struct ucma_file *file, | |
1458 | const char __user *inbuf, | |
1459 | int in_len, int out_len) | |
1460 | { | |
1461 | struct rdma_ucm_join_mcast cmd; | |
1462 | ||
1463 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1464 | return -EFAULT; | |
1465 | ||
2bd5852b | 1466 | if (!rdma_addr_size_kss(&cmd.addr)) |
1a3eff2b LR |
1467 | return -EINVAL; |
1468 | ||
5bc2b7b3 SH |
1469 | return ucma_process_join(file, &cmd, out_len); |
1470 | } | |
1471 | ||
c8f6a362 SH |
1472 | static ssize_t ucma_leave_multicast(struct ucma_file *file, |
1473 | const char __user *inbuf, | |
1474 | int in_len, int out_len) | |
1475 | { | |
1476 | struct rdma_ucm_destroy_id cmd; | |
1477 | struct rdma_ucm_destroy_id_resp resp; | |
1478 | struct ucma_multicast *mc; | |
1479 | int ret = 0; | |
1480 | ||
1481 | if (out_len < sizeof(resp)) | |
1482 | return -ENOSPC; | |
1483 | ||
1484 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1485 | return -EFAULT; | |
1486 | ||
1487 | mutex_lock(&mut); | |
1488 | mc = idr_find(&multicast_idr, cmd.id); | |
1489 | if (!mc) | |
1490 | mc = ERR_PTR(-ENOENT); | |
1491 | else if (mc->ctx->file != file) | |
1492 | mc = ERR_PTR(-EINVAL); | |
7e967fd0 JG |
1493 | else if (!atomic_inc_not_zero(&mc->ctx->ref)) |
1494 | mc = ERR_PTR(-ENXIO); | |
1495 | else | |
c8f6a362 | 1496 | idr_remove(&multicast_idr, mc->id); |
c8f6a362 SH |
1497 | mutex_unlock(&mut); |
1498 | ||
1499 | if (IS_ERR(mc)) { | |
1500 | ret = PTR_ERR(mc); | |
1501 | goto out; | |
1502 | } | |
1503 | ||
3f446754 | 1504 | rdma_leave_multicast(mc->ctx->cm_id, (struct sockaddr *) &mc->addr); |
c8f6a362 SH |
1505 | mutex_lock(&mc->ctx->file->mut); |
1506 | ucma_cleanup_mc_events(mc); | |
1507 | list_del(&mc->list); | |
1508 | mutex_unlock(&mc->ctx->file->mut); | |
1509 | ||
1510 | ucma_put_ctx(mc->ctx); | |
1511 | resp.events_reported = mc->events_reported; | |
1512 | kfree(mc); | |
1513 | ||
1514 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
1515 | &resp, sizeof(resp))) | |
1516 | ret = -EFAULT; | |
1517 | out: | |
1518 | return ret; | |
1519 | } | |
1520 | ||
88314e4d SH |
1521 | static void ucma_lock_files(struct ucma_file *file1, struct ucma_file *file2) |
1522 | { | |
1523 | /* Acquire mutex's based on pointer comparison to prevent deadlock. */ | |
1524 | if (file1 < file2) { | |
1525 | mutex_lock(&file1->mut); | |
31b57b87 | 1526 | mutex_lock_nested(&file2->mut, SINGLE_DEPTH_NESTING); |
88314e4d SH |
1527 | } else { |
1528 | mutex_lock(&file2->mut); | |
31b57b87 | 1529 | mutex_lock_nested(&file1->mut, SINGLE_DEPTH_NESTING); |
88314e4d SH |
1530 | } |
1531 | } | |
1532 | ||
1533 | static void ucma_unlock_files(struct ucma_file *file1, struct ucma_file *file2) | |
1534 | { | |
1535 | if (file1 < file2) { | |
1536 | mutex_unlock(&file2->mut); | |
1537 | mutex_unlock(&file1->mut); | |
1538 | } else { | |
1539 | mutex_unlock(&file1->mut); | |
1540 | mutex_unlock(&file2->mut); | |
1541 | } | |
1542 | } | |
1543 | ||
1544 | static void ucma_move_events(struct ucma_context *ctx, struct ucma_file *file) | |
1545 | { | |
1546 | struct ucma_event *uevent, *tmp; | |
1547 | ||
1548 | list_for_each_entry_safe(uevent, tmp, &ctx->file->event_list, list) | |
1549 | if (uevent->ctx == ctx) | |
1550 | list_move_tail(&uevent->list, &file->event_list); | |
1551 | } | |
1552 | ||
1553 | static ssize_t ucma_migrate_id(struct ucma_file *new_file, | |
1554 | const char __user *inbuf, | |
1555 | int in_len, int out_len) | |
1556 | { | |
1557 | struct rdma_ucm_migrate_id cmd; | |
1558 | struct rdma_ucm_migrate_resp resp; | |
1559 | struct ucma_context *ctx; | |
2903ff01 | 1560 | struct fd f; |
88314e4d SH |
1561 | struct ucma_file *cur_file; |
1562 | int ret = 0; | |
1563 | ||
1564 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1565 | return -EFAULT; | |
1566 | ||
1567 | /* Get current fd to protect against it being closed */ | |
2903ff01 AV |
1568 | f = fdget(cmd.fd); |
1569 | if (!f.file) | |
88314e4d | 1570 | return -ENOENT; |
ea18ff00 JH |
1571 | if (f.file->f_op != &ucma_fops) { |
1572 | ret = -EINVAL; | |
1573 | goto file_put; | |
1574 | } | |
88314e4d SH |
1575 | |
1576 | /* Validate current fd and prevent destruction of id. */ | |
2903ff01 | 1577 | ctx = ucma_get_ctx(f.file->private_data, cmd.id); |
88314e4d SH |
1578 | if (IS_ERR(ctx)) { |
1579 | ret = PTR_ERR(ctx); | |
1580 | goto file_put; | |
1581 | } | |
1582 | ||
1583 | cur_file = ctx->file; | |
1584 | if (cur_file == new_file) { | |
1585 | resp.events_reported = ctx->events_reported; | |
1586 | goto response; | |
1587 | } | |
1588 | ||
1589 | /* | |
1590 | * Migrate events between fd's, maintaining order, and avoiding new | |
1591 | * events being added before existing events. | |
1592 | */ | |
1593 | ucma_lock_files(cur_file, new_file); | |
1594 | mutex_lock(&mut); | |
1595 | ||
1596 | list_move_tail(&ctx->list, &new_file->ctx_list); | |
1597 | ucma_move_events(ctx, new_file); | |
1598 | ctx->file = new_file; | |
1599 | resp.events_reported = ctx->events_reported; | |
1600 | ||
1601 | mutex_unlock(&mut); | |
1602 | ucma_unlock_files(cur_file, new_file); | |
1603 | ||
1604 | response: | |
1605 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
1606 | &resp, sizeof(resp))) | |
1607 | ret = -EFAULT; | |
1608 | ||
1609 | ucma_put_ctx(ctx); | |
1610 | file_put: | |
2903ff01 | 1611 | fdput(f); |
88314e4d SH |
1612 | return ret; |
1613 | } | |
1614 | ||
75216638 SH |
1615 | static ssize_t (*ucma_cmd_table[])(struct ucma_file *file, |
1616 | const char __user *inbuf, | |
1617 | int in_len, int out_len) = { | |
05ad9457 SH |
1618 | [RDMA_USER_CM_CMD_CREATE_ID] = ucma_create_id, |
1619 | [RDMA_USER_CM_CMD_DESTROY_ID] = ucma_destroy_id, | |
1620 | [RDMA_USER_CM_CMD_BIND_IP] = ucma_bind_ip, | |
1621 | [RDMA_USER_CM_CMD_RESOLVE_IP] = ucma_resolve_ip, | |
1622 | [RDMA_USER_CM_CMD_RESOLVE_ROUTE] = ucma_resolve_route, | |
1623 | [RDMA_USER_CM_CMD_QUERY_ROUTE] = ucma_query_route, | |
1624 | [RDMA_USER_CM_CMD_CONNECT] = ucma_connect, | |
1625 | [RDMA_USER_CM_CMD_LISTEN] = ucma_listen, | |
1626 | [RDMA_USER_CM_CMD_ACCEPT] = ucma_accept, | |
1627 | [RDMA_USER_CM_CMD_REJECT] = ucma_reject, | |
1628 | [RDMA_USER_CM_CMD_DISCONNECT] = ucma_disconnect, | |
1629 | [RDMA_USER_CM_CMD_INIT_QP_ATTR] = ucma_init_qp_attr, | |
1630 | [RDMA_USER_CM_CMD_GET_EVENT] = ucma_get_event, | |
1631 | [RDMA_USER_CM_CMD_GET_OPTION] = NULL, | |
1632 | [RDMA_USER_CM_CMD_SET_OPTION] = ucma_set_option, | |
1633 | [RDMA_USER_CM_CMD_NOTIFY] = ucma_notify, | |
1634 | [RDMA_USER_CM_CMD_JOIN_IP_MCAST] = ucma_join_ip_multicast, | |
1635 | [RDMA_USER_CM_CMD_LEAVE_MCAST] = ucma_leave_multicast, | |
1636 | [RDMA_USER_CM_CMD_MIGRATE_ID] = ucma_migrate_id, | |
eebe4c3a | 1637 | [RDMA_USER_CM_CMD_QUERY] = ucma_query, |
209cf2a7 | 1638 | [RDMA_USER_CM_CMD_BIND] = ucma_bind, |
5bc2b7b3 SH |
1639 | [RDMA_USER_CM_CMD_RESOLVE_ADDR] = ucma_resolve_addr, |
1640 | [RDMA_USER_CM_CMD_JOIN_MCAST] = ucma_join_multicast | |
75216638 SH |
1641 | }; |
1642 | ||
1643 | static ssize_t ucma_write(struct file *filp, const char __user *buf, | |
1644 | size_t len, loff_t *pos) | |
1645 | { | |
1646 | struct ucma_file *file = filp->private_data; | |
1647 | struct rdma_ucm_cmd_hdr hdr; | |
1648 | ssize_t ret; | |
1649 | ||
f73a1dbc LR |
1650 | if (!ib_safe_file_access(filp)) { |
1651 | pr_err_once("ucma_write: process %d (%s) changed security contexts after opening file descriptor, this is not allowed.\n", | |
1652 | task_tgid_vnr(current), current->comm); | |
e6bd18f5 | 1653 | return -EACCES; |
f73a1dbc | 1654 | } |
e6bd18f5 | 1655 | |
75216638 SH |
1656 | if (len < sizeof(hdr)) |
1657 | return -EINVAL; | |
1658 | ||
1659 | if (copy_from_user(&hdr, buf, sizeof(hdr))) | |
1660 | return -EFAULT; | |
1661 | ||
caf6e3f2 | 1662 | if (hdr.cmd >= ARRAY_SIZE(ucma_cmd_table)) |
75216638 | 1663 | return -EINVAL; |
5f654aac | 1664 | hdr.cmd = array_index_nospec(hdr.cmd, ARRAY_SIZE(ucma_cmd_table)); |
75216638 SH |
1665 | |
1666 | if (hdr.in + sizeof(hdr) > len) | |
1667 | return -EINVAL; | |
1668 | ||
1669 | if (!ucma_cmd_table[hdr.cmd]) | |
1670 | return -ENOSYS; | |
1671 | ||
1672 | ret = ucma_cmd_table[hdr.cmd](file, buf + sizeof(hdr), hdr.in, hdr.out); | |
1673 | if (!ret) | |
1674 | ret = len; | |
1675 | ||
1676 | return ret; | |
1677 | } | |
1678 | ||
1679 | static unsigned int ucma_poll(struct file *filp, struct poll_table_struct *wait) | |
1680 | { | |
1681 | struct ucma_file *file = filp->private_data; | |
1682 | unsigned int mask = 0; | |
1683 | ||
1684 | poll_wait(filp, &file->poll_wait, wait); | |
1685 | ||
1686 | if (!list_empty(&file->event_list)) | |
1687 | mask = POLLIN | POLLRDNORM; | |
1688 | ||
1689 | return mask; | |
1690 | } | |
1691 | ||
f7a6117e RD |
1692 | /* |
1693 | * ucma_open() does not need the BKL: | |
1694 | * | |
1695 | * - no global state is referred to; | |
1696 | * - there is no ioctl method to race against; | |
1697 | * - no further module initialization is required for open to work | |
1698 | * after the device is registered. | |
1699 | */ | |
75216638 SH |
1700 | static int ucma_open(struct inode *inode, struct file *filp) |
1701 | { | |
1702 | struct ucma_file *file; | |
1703 | ||
1704 | file = kmalloc(sizeof *file, GFP_KERNEL); | |
1705 | if (!file) | |
1706 | return -ENOMEM; | |
1707 | ||
a190d3b0 BS |
1708 | file->close_wq = alloc_ordered_workqueue("ucma_close_id", |
1709 | WQ_MEM_RECLAIM); | |
0174b381 SL |
1710 | if (!file->close_wq) { |
1711 | kfree(file); | |
1712 | return -ENOMEM; | |
1713 | } | |
1714 | ||
75216638 SH |
1715 | INIT_LIST_HEAD(&file->event_list); |
1716 | INIT_LIST_HEAD(&file->ctx_list); | |
1717 | init_waitqueue_head(&file->poll_wait); | |
1718 | mutex_init(&file->mut); | |
1719 | ||
1720 | filp->private_data = file; | |
1721 | file->filp = filp; | |
bc1db9af RD |
1722 | |
1723 | return nonseekable_open(inode, filp); | |
75216638 SH |
1724 | } |
1725 | ||
1726 | static int ucma_close(struct inode *inode, struct file *filp) | |
1727 | { | |
1728 | struct ucma_file *file = filp->private_data; | |
1729 | struct ucma_context *ctx, *tmp; | |
1730 | ||
1731 | mutex_lock(&file->mut); | |
1732 | list_for_each_entry_safe(ctx, tmp, &file->ctx_list, list) { | |
e1c30298 | 1733 | ctx->destroying = 1; |
75216638 SH |
1734 | mutex_unlock(&file->mut); |
1735 | ||
1736 | mutex_lock(&mut); | |
1737 | idr_remove(&ctx_idr, ctx->id); | |
1738 | mutex_unlock(&mut); | |
1739 | ||
e1c30298 YH |
1740 | flush_workqueue(file->close_wq); |
1741 | /* At that step once ctx was marked as destroying and workqueue | |
1742 | * was flushed we are safe from any inflights handlers that | |
1743 | * might put other closing task. | |
1744 | */ | |
1745 | mutex_lock(&mut); | |
1746 | if (!ctx->closing) { | |
1747 | mutex_unlock(&mut); | |
d0fcc1f0 CW |
1748 | ucma_put_ctx(ctx); |
1749 | wait_for_completion(&ctx->comp); | |
e1c30298 YH |
1750 | /* rdma_destroy_id ensures that no event handlers are |
1751 | * inflight for that id before releasing it. | |
1752 | */ | |
1753 | rdma_destroy_id(ctx->cm_id); | |
1754 | } else { | |
1755 | mutex_unlock(&mut); | |
1756 | } | |
1757 | ||
75216638 SH |
1758 | ucma_free_ctx(ctx); |
1759 | mutex_lock(&file->mut); | |
1760 | } | |
1761 | mutex_unlock(&file->mut); | |
e1c30298 | 1762 | destroy_workqueue(file->close_wq); |
75216638 SH |
1763 | kfree(file); |
1764 | return 0; | |
1765 | } | |
1766 | ||
2b8693c0 | 1767 | static const struct file_operations ucma_fops = { |
75216638 SH |
1768 | .owner = THIS_MODULE, |
1769 | .open = ucma_open, | |
1770 | .release = ucma_close, | |
1771 | .write = ucma_write, | |
1772 | .poll = ucma_poll, | |
bc1db9af | 1773 | .llseek = no_llseek, |
75216638 SH |
1774 | }; |
1775 | ||
1776 | static struct miscdevice ucma_misc = { | |
04ea2f81 RD |
1777 | .minor = MISC_DYNAMIC_MINOR, |
1778 | .name = "rdma_cm", | |
1779 | .nodename = "infiniband/rdma_cm", | |
1780 | .mode = 0666, | |
1781 | .fops = &ucma_fops, | |
75216638 SH |
1782 | }; |
1783 | ||
1784 | static ssize_t show_abi_version(struct device *dev, | |
1785 | struct device_attribute *attr, | |
1786 | char *buf) | |
1787 | { | |
1788 | return sprintf(buf, "%d\n", RDMA_USER_CM_ABI_VERSION); | |
1789 | } | |
1790 | static DEVICE_ATTR(abi_version, S_IRUGO, show_abi_version, NULL); | |
1791 | ||
1792 | static int __init ucma_init(void) | |
1793 | { | |
1794 | int ret; | |
1795 | ||
1796 | ret = misc_register(&ucma_misc); | |
1797 | if (ret) | |
1798 | return ret; | |
1799 | ||
1800 | ret = device_create_file(ucma_misc.this_device, &dev_attr_abi_version); | |
1801 | if (ret) { | |
aba25a3e | 1802 | pr_err("rdma_ucm: couldn't create abi_version attr\n"); |
97cb7e40 SW |
1803 | goto err1; |
1804 | } | |
1805 | ||
ec8f23ce | 1806 | ucma_ctl_table_hdr = register_net_sysctl(&init_net, "net/rdma_ucm", ucma_ctl_table); |
97cb7e40 | 1807 | if (!ucma_ctl_table_hdr) { |
aba25a3e | 1808 | pr_err("rdma_ucm: couldn't register sysctl paths\n"); |
97cb7e40 SW |
1809 | ret = -ENOMEM; |
1810 | goto err2; | |
75216638 SH |
1811 | } |
1812 | return 0; | |
97cb7e40 SW |
1813 | err2: |
1814 | device_remove_file(ucma_misc.this_device, &dev_attr_abi_version); | |
1815 | err1: | |
75216638 SH |
1816 | misc_deregister(&ucma_misc); |
1817 | return ret; | |
1818 | } | |
1819 | ||
1820 | static void __exit ucma_cleanup(void) | |
1821 | { | |
5dd3df10 | 1822 | unregister_net_sysctl_table(ucma_ctl_table_hdr); |
75216638 SH |
1823 | device_remove_file(ucma_misc.this_device, &dev_attr_abi_version); |
1824 | misc_deregister(&ucma_misc); | |
1825 | idr_destroy(&ctx_idr); | |
45d25420 | 1826 | idr_destroy(&multicast_idr); |
75216638 SH |
1827 | } |
1828 | ||
1829 | module_init(ucma_init); | |
1830 | module_exit(ucma_cleanup); |