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