Commit | Line | Data |
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75216638 SH |
1 | /* |
2 | * Copyright (c) 2005-2006 Intel Corporation. All rights reserved. | |
3 | * | |
4 | * This software is available to you under a choice of one of two | |
5 | * licenses. You may choose to be licensed under the terms of the GNU | |
6 | * General Public License (GPL) Version 2, available from the file | |
7 | * COPYING in the main directory of this source tree, or the | |
8 | * OpenIB.org BSD license below: | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or | |
11 | * without modification, are permitted provided that the following | |
12 | * conditions are met: | |
13 | * | |
14 | * - Redistributions of source code must retain the above | |
15 | * copyright notice, this list of conditions and the following | |
16 | * disclaimer. | |
17 | * | |
18 | * - Redistributions in binary form must reproduce the above | |
19 | * copyright notice, this list of conditions and the following | |
20 | * disclaimer in the documentation and/or other materials | |
21 | * provided with the distribution. | |
22 | * | |
23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
30 | * SOFTWARE. | |
31 | */ | |
32 | ||
33 | #include <linux/completion.h> | |
88314e4d | 34 | #include <linux/file.h> |
75216638 SH |
35 | #include <linux/mutex.h> |
36 | #include <linux/poll.h> | |
d43c36dc | 37 | #include <linux/sched.h> |
75216638 SH |
38 | #include <linux/idr.h> |
39 | #include <linux/in.h> | |
40 | #include <linux/in6.h> | |
41 | #include <linux/miscdevice.h> | |
5a0e3ad6 | 42 | #include <linux/slab.h> |
97cb7e40 | 43 | #include <linux/sysctl.h> |
e4dd23d7 | 44 | #include <linux/module.h> |
95893dde | 45 | #include <linux/nsproxy.h> |
75216638 SH |
46 | |
47 | #include <rdma/rdma_user_cm.h> | |
48 | #include <rdma/ib_marshall.h> | |
49 | #include <rdma/rdma_cm.h> | |
a7ca1f00 | 50 | #include <rdma/rdma_cm_ib.h> |
ee7aed45 | 51 | #include <rdma/ib_addr.h> |
edaa7a55 | 52 | #include <rdma/ib.h> |
75216638 SH |
53 | |
54 | MODULE_AUTHOR("Sean Hefty"); | |
55 | MODULE_DESCRIPTION("RDMA Userspace Connection Manager Access"); | |
56 | MODULE_LICENSE("Dual BSD/GPL"); | |
57 | ||
97cb7e40 SW |
58 | static unsigned int max_backlog = 1024; |
59 | ||
60 | static struct ctl_table_header *ucma_ctl_table_hdr; | |
f3a5e3e3 | 61 | static struct ctl_table ucma_ctl_table[] = { |
97cb7e40 SW |
62 | { |
63 | .procname = "max_backlog", | |
64 | .data = &max_backlog, | |
65 | .maxlen = sizeof max_backlog, | |
66 | .mode = 0644, | |
67 | .proc_handler = proc_dointvec, | |
68 | }, | |
69 | { } | |
70 | }; | |
71 | ||
75216638 SH |
72 | struct ucma_file { |
73 | struct mutex mut; | |
74 | struct file *filp; | |
75 | struct list_head ctx_list; | |
76 | struct list_head event_list; | |
77 | wait_queue_head_t poll_wait; | |
e1c30298 | 78 | struct workqueue_struct *close_wq; |
75216638 SH |
79 | }; |
80 | ||
81 | struct ucma_context { | |
82 | int id; | |
83 | struct completion comp; | |
84 | atomic_t ref; | |
85 | int events_reported; | |
86 | int backlog; | |
87 | ||
88 | struct ucma_file *file; | |
89 | struct rdma_cm_id *cm_id; | |
90 | u64 uid; | |
91 | ||
92 | struct list_head list; | |
c8f6a362 | 93 | struct list_head mc_list; |
e1c30298 YH |
94 | /* mark that device is in process of destroying the internal HW |
95 | * resources, protected by the global mut | |
96 | */ | |
97 | int closing; | |
98 | /* sync between removal event and id destroy, protected by file mut */ | |
99 | int destroying; | |
100 | struct work_struct close_work; | |
c8f6a362 SH |
101 | }; |
102 | ||
103 | struct ucma_multicast { | |
104 | struct ucma_context *ctx; | |
105 | int id; | |
106 | int events_reported; | |
107 | ||
108 | u64 uid; | |
ab15c95a | 109 | u8 join_state; |
c8f6a362 | 110 | struct list_head list; |
3f446754 | 111 | struct sockaddr_storage addr; |
75216638 SH |
112 | }; |
113 | ||
114 | struct ucma_event { | |
115 | struct ucma_context *ctx; | |
c8f6a362 | 116 | struct ucma_multicast *mc; |
75216638 SH |
117 | struct list_head list; |
118 | struct rdma_cm_id *cm_id; | |
119 | struct rdma_ucm_event_resp resp; | |
e1c30298 | 120 | struct work_struct close_work; |
75216638 SH |
121 | }; |
122 | ||
123 | static DEFINE_MUTEX(mut); | |
124 | static DEFINE_IDR(ctx_idr); | |
c8f6a362 | 125 | static DEFINE_IDR(multicast_idr); |
75216638 SH |
126 | |
127 | static inline struct ucma_context *_ucma_find_context(int id, | |
128 | struct ucma_file *file) | |
129 | { | |
130 | struct ucma_context *ctx; | |
131 | ||
132 | ctx = idr_find(&ctx_idr, id); | |
133 | if (!ctx) | |
134 | ctx = ERR_PTR(-ENOENT); | |
e8980d67 | 135 | else if (ctx->file != file || !ctx->cm_id) |
75216638 SH |
136 | ctx = ERR_PTR(-EINVAL); |
137 | return ctx; | |
138 | } | |
139 | ||
140 | static struct ucma_context *ucma_get_ctx(struct ucma_file *file, int id) | |
141 | { | |
142 | struct ucma_context *ctx; | |
143 | ||
144 | mutex_lock(&mut); | |
145 | ctx = _ucma_find_context(id, file); | |
e1c30298 YH |
146 | if (!IS_ERR(ctx)) { |
147 | if (ctx->closing) | |
148 | ctx = ERR_PTR(-EIO); | |
149 | else | |
150 | atomic_inc(&ctx->ref); | |
151 | } | |
75216638 SH |
152 | mutex_unlock(&mut); |
153 | return ctx; | |
154 | } | |
155 | ||
156 | static void ucma_put_ctx(struct ucma_context *ctx) | |
157 | { | |
158 | if (atomic_dec_and_test(&ctx->ref)) | |
159 | complete(&ctx->comp); | |
160 | } | |
161 | ||
8b77586b JG |
162 | /* |
163 | * Same as ucm_get_ctx but requires that ->cm_id->device is valid, eg that the | |
164 | * CM_ID is bound. | |
165 | */ | |
166 | static struct ucma_context *ucma_get_ctx_dev(struct ucma_file *file, int id) | |
167 | { | |
168 | struct ucma_context *ctx = ucma_get_ctx(file, id); | |
169 | ||
170 | if (IS_ERR(ctx)) | |
171 | return ctx; | |
172 | if (!ctx->cm_id->device) { | |
173 | ucma_put_ctx(ctx); | |
174 | return ERR_PTR(-EINVAL); | |
175 | } | |
176 | return ctx; | |
177 | } | |
178 | ||
e1c30298 YH |
179 | static void ucma_close_event_id(struct work_struct *work) |
180 | { | |
181 | struct ucma_event *uevent_close = container_of(work, struct ucma_event, close_work); | |
182 | ||
183 | rdma_destroy_id(uevent_close->cm_id); | |
184 | kfree(uevent_close); | |
185 | } | |
186 | ||
187 | static void ucma_close_id(struct work_struct *work) | |
188 | { | |
189 | struct ucma_context *ctx = container_of(work, struct ucma_context, close_work); | |
190 | ||
191 | /* once all inflight tasks are finished, we close all underlying | |
192 | * resources. The context is still alive till its explicit destryoing | |
193 | * by its creator. | |
194 | */ | |
195 | ucma_put_ctx(ctx); | |
196 | wait_for_completion(&ctx->comp); | |
197 | /* No new events will be generated after destroying the id. */ | |
198 | rdma_destroy_id(ctx->cm_id); | |
199 | } | |
200 | ||
75216638 SH |
201 | static struct ucma_context *ucma_alloc_ctx(struct ucma_file *file) |
202 | { | |
203 | struct ucma_context *ctx; | |
75216638 SH |
204 | |
205 | ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); | |
206 | if (!ctx) | |
207 | return NULL; | |
208 | ||
e1c30298 | 209 | INIT_WORK(&ctx->close_work, ucma_close_id); |
75216638 SH |
210 | atomic_set(&ctx->ref, 1); |
211 | init_completion(&ctx->comp); | |
c8f6a362 | 212 | INIT_LIST_HEAD(&ctx->mc_list); |
75216638 SH |
213 | ctx->file = file; |
214 | ||
3b069c5d TH |
215 | mutex_lock(&mut); |
216 | ctx->id = idr_alloc(&ctx_idr, ctx, 0, 0, GFP_KERNEL); | |
217 | mutex_unlock(&mut); | |
218 | if (ctx->id < 0) | |
75216638 SH |
219 | goto error; |
220 | ||
221 | list_add_tail(&ctx->list, &file->ctx_list); | |
222 | return ctx; | |
223 | ||
224 | error: | |
225 | kfree(ctx); | |
226 | return NULL; | |
227 | } | |
228 | ||
c8f6a362 SH |
229 | static struct ucma_multicast* ucma_alloc_multicast(struct ucma_context *ctx) |
230 | { | |
231 | struct ucma_multicast *mc; | |
c8f6a362 SH |
232 | |
233 | mc = kzalloc(sizeof(*mc), GFP_KERNEL); | |
234 | if (!mc) | |
235 | return NULL; | |
236 | ||
3b069c5d TH |
237 | mutex_lock(&mut); |
238 | mc->id = idr_alloc(&multicast_idr, mc, 0, 0, GFP_KERNEL); | |
239 | mutex_unlock(&mut); | |
240 | if (mc->id < 0) | |
c8f6a362 SH |
241 | goto error; |
242 | ||
243 | mc->ctx = ctx; | |
244 | list_add_tail(&mc->list, &ctx->mc_list); | |
245 | return mc; | |
246 | ||
247 | error: | |
248 | kfree(mc); | |
249 | return NULL; | |
250 | } | |
251 | ||
75216638 SH |
252 | static void ucma_copy_conn_event(struct rdma_ucm_conn_param *dst, |
253 | struct rdma_conn_param *src) | |
254 | { | |
255 | if (src->private_data_len) | |
256 | memcpy(dst->private_data, src->private_data, | |
257 | src->private_data_len); | |
258 | dst->private_data_len = src->private_data_len; | |
259 | dst->responder_resources =src->responder_resources; | |
260 | dst->initiator_depth = src->initiator_depth; | |
261 | dst->flow_control = src->flow_control; | |
262 | dst->retry_count = src->retry_count; | |
263 | dst->rnr_retry_count = src->rnr_retry_count; | |
264 | dst->srq = src->srq; | |
265 | dst->qp_num = src->qp_num; | |
266 | } | |
267 | ||
d541e455 DC |
268 | static void ucma_copy_ud_event(struct ib_device *device, |
269 | struct rdma_ucm_ud_param *dst, | |
75216638 SH |
270 | struct rdma_ud_param *src) |
271 | { | |
272 | if (src->private_data_len) | |
273 | memcpy(dst->private_data, src->private_data, | |
274 | src->private_data_len); | |
275 | dst->private_data_len = src->private_data_len; | |
d541e455 | 276 | ib_copy_ah_attr_to_user(device, &dst->ah_attr, &src->ah_attr); |
75216638 SH |
277 | dst->qp_num = src->qp_num; |
278 | dst->qkey = src->qkey; | |
279 | } | |
280 | ||
281 | static void ucma_set_event_context(struct ucma_context *ctx, | |
282 | struct rdma_cm_event *event, | |
283 | struct ucma_event *uevent) | |
284 | { | |
285 | uevent->ctx = ctx; | |
c8f6a362 SH |
286 | switch (event->event) { |
287 | case RDMA_CM_EVENT_MULTICAST_JOIN: | |
288 | case RDMA_CM_EVENT_MULTICAST_ERROR: | |
289 | uevent->mc = (struct ucma_multicast *) | |
290 | event->param.ud.private_data; | |
291 | uevent->resp.uid = uevent->mc->uid; | |
292 | uevent->resp.id = uevent->mc->id; | |
293 | break; | |
294 | default: | |
295 | uevent->resp.uid = ctx->uid; | |
296 | uevent->resp.id = ctx->id; | |
297 | break; | |
298 | } | |
75216638 SH |
299 | } |
300 | ||
e1c30298 YH |
301 | /* Called with file->mut locked for the relevant context. */ |
302 | static void ucma_removal_event_handler(struct rdma_cm_id *cm_id) | |
303 | { | |
304 | struct ucma_context *ctx = cm_id->context; | |
305 | struct ucma_event *con_req_eve; | |
306 | int event_found = 0; | |
307 | ||
308 | if (ctx->destroying) | |
309 | return; | |
310 | ||
311 | /* only if context is pointing to cm_id that it owns it and can be | |
312 | * queued to be closed, otherwise that cm_id is an inflight one that | |
313 | * is part of that context event list pending to be detached and | |
314 | * reattached to its new context as part of ucma_get_event, | |
315 | * handled separately below. | |
316 | */ | |
317 | if (ctx->cm_id == cm_id) { | |
318 | mutex_lock(&mut); | |
319 | ctx->closing = 1; | |
320 | mutex_unlock(&mut); | |
321 | queue_work(ctx->file->close_wq, &ctx->close_work); | |
322 | return; | |
323 | } | |
324 | ||
325 | list_for_each_entry(con_req_eve, &ctx->file->event_list, list) { | |
326 | if (con_req_eve->cm_id == cm_id && | |
327 | con_req_eve->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) { | |
328 | list_del(&con_req_eve->list); | |
329 | INIT_WORK(&con_req_eve->close_work, ucma_close_event_id); | |
330 | queue_work(ctx->file->close_wq, &con_req_eve->close_work); | |
331 | event_found = 1; | |
332 | break; | |
333 | } | |
334 | } | |
335 | if (!event_found) | |
aba25a3e | 336 | pr_err("ucma_removal_event_handler: warning: connect request event wasn't found\n"); |
e1c30298 YH |
337 | } |
338 | ||
75216638 SH |
339 | static int ucma_event_handler(struct rdma_cm_id *cm_id, |
340 | struct rdma_cm_event *event) | |
341 | { | |
342 | struct ucma_event *uevent; | |
343 | struct ucma_context *ctx = cm_id->context; | |
344 | int ret = 0; | |
345 | ||
346 | uevent = kzalloc(sizeof(*uevent), GFP_KERNEL); | |
347 | if (!uevent) | |
348 | return event->event == RDMA_CM_EVENT_CONNECT_REQUEST; | |
349 | ||
418edaab | 350 | mutex_lock(&ctx->file->mut); |
75216638 SH |
351 | uevent->cm_id = cm_id; |
352 | ucma_set_event_context(ctx, event, uevent); | |
353 | uevent->resp.event = event->event; | |
354 | uevent->resp.status = event->status; | |
638ef7a6 | 355 | if (cm_id->qp_type == IB_QPT_UD) |
d541e455 DC |
356 | ucma_copy_ud_event(cm_id->device, &uevent->resp.param.ud, |
357 | &event->param.ud); | |
75216638 SH |
358 | else |
359 | ucma_copy_conn_event(&uevent->resp.param.conn, | |
360 | &event->param.conn); | |
361 | ||
75216638 SH |
362 | if (event->event == RDMA_CM_EVENT_CONNECT_REQUEST) { |
363 | if (!ctx->backlog) { | |
3492856e | 364 | ret = -ENOMEM; |
30a5ec98 | 365 | kfree(uevent); |
75216638 SH |
366 | goto out; |
367 | } | |
368 | ctx->backlog--; | |
c6b21824 | 369 | } else if (!ctx->uid || ctx->cm_id != cm_id) { |
0cefcf0b SH |
370 | /* |
371 | * We ignore events for new connections until userspace has set | |
372 | * their context. This can only happen if an error occurs on a | |
373 | * new connection before the user accepts it. This is okay, | |
e1c30298 YH |
374 | * since the accept will just fail later. However, we do need |
375 | * to release the underlying HW resources in case of a device | |
376 | * removal event. | |
0cefcf0b | 377 | */ |
e1c30298 YH |
378 | if (event->event == RDMA_CM_EVENT_DEVICE_REMOVAL) |
379 | ucma_removal_event_handler(cm_id); | |
380 | ||
0cefcf0b SH |
381 | kfree(uevent); |
382 | goto out; | |
75216638 | 383 | } |
0cefcf0b | 384 | |
75216638 SH |
385 | list_add_tail(&uevent->list, &ctx->file->event_list); |
386 | wake_up_interruptible(&ctx->file->poll_wait); | |
e1c30298 YH |
387 | if (event->event == RDMA_CM_EVENT_DEVICE_REMOVAL) |
388 | ucma_removal_event_handler(cm_id); | |
75216638 SH |
389 | out: |
390 | mutex_unlock(&ctx->file->mut); | |
391 | return ret; | |
392 | } | |
393 | ||
394 | static ssize_t ucma_get_event(struct ucma_file *file, const char __user *inbuf, | |
395 | int in_len, int out_len) | |
396 | { | |
397 | struct ucma_context *ctx; | |
398 | struct rdma_ucm_get_event cmd; | |
399 | struct ucma_event *uevent; | |
400 | int ret = 0; | |
75216638 | 401 | |
611cb92b JG |
402 | /* |
403 | * Old 32 bit user space does not send the 4 byte padding in the | |
404 | * reserved field. We don't care, allow it to keep working. | |
405 | */ | |
406 | if (out_len < sizeof(uevent->resp) - sizeof(uevent->resp.reserved)) | |
75216638 SH |
407 | return -ENOSPC; |
408 | ||
409 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
410 | return -EFAULT; | |
411 | ||
412 | mutex_lock(&file->mut); | |
413 | while (list_empty(&file->event_list)) { | |
d92f7644 | 414 | mutex_unlock(&file->mut); |
75216638 | 415 | |
d92f7644 SH |
416 | if (file->filp->f_flags & O_NONBLOCK) |
417 | return -EAGAIN; | |
418 | ||
419 | if (wait_event_interruptible(file->poll_wait, | |
420 | !list_empty(&file->event_list))) | |
421 | return -ERESTARTSYS; | |
75216638 | 422 | |
75216638 | 423 | mutex_lock(&file->mut); |
75216638 SH |
424 | } |
425 | ||
75216638 SH |
426 | uevent = list_entry(file->event_list.next, struct ucma_event, list); |
427 | ||
428 | if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) { | |
429 | ctx = ucma_alloc_ctx(file); | |
430 | if (!ctx) { | |
431 | ret = -ENOMEM; | |
432 | goto done; | |
433 | } | |
434 | uevent->ctx->backlog++; | |
435 | ctx->cm_id = uevent->cm_id; | |
436 | ctx->cm_id->context = ctx; | |
437 | uevent->resp.id = ctx->id; | |
438 | } | |
439 | ||
6f57c933 | 440 | if (copy_to_user(u64_to_user_ptr(cmd.response), |
611cb92b JG |
441 | &uevent->resp, |
442 | min_t(size_t, out_len, sizeof(uevent->resp)))) { | |
75216638 SH |
443 | ret = -EFAULT; |
444 | goto done; | |
445 | } | |
446 | ||
447 | list_del(&uevent->list); | |
448 | uevent->ctx->events_reported++; | |
c8f6a362 SH |
449 | if (uevent->mc) |
450 | uevent->mc->events_reported++; | |
75216638 SH |
451 | kfree(uevent); |
452 | done: | |
453 | mutex_unlock(&file->mut); | |
454 | return ret; | |
455 | } | |
456 | ||
b26f9b99 SH |
457 | static int ucma_get_qp_type(struct rdma_ucm_create_id *cmd, enum ib_qp_type *qp_type) |
458 | { | |
459 | switch (cmd->ps) { | |
460 | case RDMA_PS_TCP: | |
461 | *qp_type = IB_QPT_RC; | |
462 | return 0; | |
463 | case RDMA_PS_UDP: | |
464 | case RDMA_PS_IPOIB: | |
465 | *qp_type = IB_QPT_UD; | |
466 | return 0; | |
638ef7a6 SH |
467 | case RDMA_PS_IB: |
468 | *qp_type = cmd->qp_type; | |
469 | return 0; | |
b26f9b99 SH |
470 | default: |
471 | return -EINVAL; | |
472 | } | |
473 | } | |
474 | ||
475 | static ssize_t ucma_create_id(struct ucma_file *file, const char __user *inbuf, | |
476 | int in_len, int out_len) | |
75216638 SH |
477 | { |
478 | struct rdma_ucm_create_id cmd; | |
479 | struct rdma_ucm_create_id_resp resp; | |
480 | struct ucma_context *ctx; | |
e8980d67 | 481 | struct rdma_cm_id *cm_id; |
b26f9b99 | 482 | enum ib_qp_type qp_type; |
75216638 SH |
483 | int ret; |
484 | ||
485 | if (out_len < sizeof(resp)) | |
486 | return -ENOSPC; | |
487 | ||
488 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
489 | return -EFAULT; | |
490 | ||
b26f9b99 SH |
491 | ret = ucma_get_qp_type(&cmd, &qp_type); |
492 | if (ret) | |
493 | return ret; | |
494 | ||
75216638 SH |
495 | mutex_lock(&file->mut); |
496 | ctx = ucma_alloc_ctx(file); | |
497 | mutex_unlock(&file->mut); | |
498 | if (!ctx) | |
499 | return -ENOMEM; | |
500 | ||
501 | ctx->uid = cmd.uid; | |
19fd08b8 LT |
502 | cm_id = __rdma_create_id(current->nsproxy->net_ns, |
503 | ucma_event_handler, ctx, cmd.ps, qp_type, NULL); | |
e8980d67 LR |
504 | if (IS_ERR(cm_id)) { |
505 | ret = PTR_ERR(cm_id); | |
75216638 SH |
506 | goto err1; |
507 | } | |
508 | ||
509 | resp.id = ctx->id; | |
6f57c933 | 510 | if (copy_to_user(u64_to_user_ptr(cmd.response), |
75216638 SH |
511 | &resp, sizeof(resp))) { |
512 | ret = -EFAULT; | |
513 | goto err2; | |
514 | } | |
e8980d67 LR |
515 | |
516 | ctx->cm_id = cm_id; | |
75216638 SH |
517 | return 0; |
518 | ||
519 | err2: | |
e8980d67 | 520 | rdma_destroy_id(cm_id); |
75216638 SH |
521 | err1: |
522 | mutex_lock(&mut); | |
523 | idr_remove(&ctx_idr, ctx->id); | |
524 | mutex_unlock(&mut); | |
ed65a4dc LR |
525 | mutex_lock(&file->mut); |
526 | list_del(&ctx->list); | |
527 | mutex_unlock(&file->mut); | |
75216638 SH |
528 | kfree(ctx); |
529 | return ret; | |
530 | } | |
531 | ||
c8f6a362 SH |
532 | static void ucma_cleanup_multicast(struct ucma_context *ctx) |
533 | { | |
534 | struct ucma_multicast *mc, *tmp; | |
535 | ||
536 | mutex_lock(&mut); | |
537 | list_for_each_entry_safe(mc, tmp, &ctx->mc_list, list) { | |
538 | list_del(&mc->list); | |
539 | idr_remove(&multicast_idr, mc->id); | |
540 | kfree(mc); | |
541 | } | |
542 | mutex_unlock(&mut); | |
543 | } | |
544 | ||
c8f6a362 SH |
545 | static void ucma_cleanup_mc_events(struct ucma_multicast *mc) |
546 | { | |
547 | struct ucma_event *uevent, *tmp; | |
548 | ||
549 | list_for_each_entry_safe(uevent, tmp, &mc->ctx->file->event_list, list) { | |
550 | if (uevent->mc != mc) | |
551 | continue; | |
552 | ||
553 | list_del(&uevent->list); | |
554 | kfree(uevent); | |
555 | } | |
556 | } | |
557 | ||
186834b5 | 558 | /* |
e1c30298 YH |
559 | * ucma_free_ctx is called after the underlying rdma CM-ID is destroyed. At |
560 | * this point, no new events will be reported from the hardware. However, we | |
561 | * still need to cleanup the UCMA context for this ID. Specifically, there | |
562 | * might be events that have not yet been consumed by the user space software. | |
563 | * These might include pending connect requests which we have not completed | |
564 | * processing. We cannot call rdma_destroy_id while holding the lock of the | |
565 | * context (file->mut), as it might cause a deadlock. We therefore extract all | |
566 | * relevant events from the context pending events list while holding the | |
567 | * mutex. After that we release them as needed. | |
186834b5 | 568 | */ |
75216638 SH |
569 | static int ucma_free_ctx(struct ucma_context *ctx) |
570 | { | |
571 | int events_reported; | |
186834b5 HS |
572 | struct ucma_event *uevent, *tmp; |
573 | LIST_HEAD(list); | |
75216638 | 574 | |
75216638 | 575 | |
c8f6a362 SH |
576 | ucma_cleanup_multicast(ctx); |
577 | ||
75216638 SH |
578 | /* Cleanup events not yet reported to the user. */ |
579 | mutex_lock(&ctx->file->mut); | |
186834b5 HS |
580 | list_for_each_entry_safe(uevent, tmp, &ctx->file->event_list, list) { |
581 | if (uevent->ctx == ctx) | |
582 | list_move_tail(&uevent->list, &list); | |
583 | } | |
75216638 SH |
584 | list_del(&ctx->list); |
585 | mutex_unlock(&ctx->file->mut); | |
586 | ||
186834b5 HS |
587 | list_for_each_entry_safe(uevent, tmp, &list, list) { |
588 | list_del(&uevent->list); | |
589 | if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) | |
590 | rdma_destroy_id(uevent->cm_id); | |
591 | kfree(uevent); | |
592 | } | |
593 | ||
75216638 SH |
594 | events_reported = ctx->events_reported; |
595 | kfree(ctx); | |
596 | return events_reported; | |
597 | } | |
598 | ||
599 | static ssize_t ucma_destroy_id(struct ucma_file *file, const char __user *inbuf, | |
600 | int in_len, int out_len) | |
601 | { | |
602 | struct rdma_ucm_destroy_id cmd; | |
603 | struct rdma_ucm_destroy_id_resp resp; | |
604 | struct ucma_context *ctx; | |
605 | int ret = 0; | |
606 | ||
607 | if (out_len < sizeof(resp)) | |
608 | return -ENOSPC; | |
609 | ||
610 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
611 | return -EFAULT; | |
612 | ||
613 | mutex_lock(&mut); | |
614 | ctx = _ucma_find_context(cmd.id, file); | |
615 | if (!IS_ERR(ctx)) | |
616 | idr_remove(&ctx_idr, ctx->id); | |
617 | mutex_unlock(&mut); | |
618 | ||
619 | if (IS_ERR(ctx)) | |
620 | return PTR_ERR(ctx); | |
621 | ||
e1c30298 YH |
622 | mutex_lock(&ctx->file->mut); |
623 | ctx->destroying = 1; | |
624 | mutex_unlock(&ctx->file->mut); | |
625 | ||
626 | flush_workqueue(ctx->file->close_wq); | |
627 | /* At this point it's guaranteed that there is no inflight | |
628 | * closing task */ | |
629 | mutex_lock(&mut); | |
630 | if (!ctx->closing) { | |
631 | mutex_unlock(&mut); | |
632 | ucma_put_ctx(ctx); | |
633 | wait_for_completion(&ctx->comp); | |
634 | rdma_destroy_id(ctx->cm_id); | |
635 | } else { | |
636 | mutex_unlock(&mut); | |
637 | } | |
75216638 | 638 | |
e1c30298 | 639 | resp.events_reported = ucma_free_ctx(ctx); |
6f57c933 | 640 | if (copy_to_user(u64_to_user_ptr(cmd.response), |
75216638 SH |
641 | &resp, sizeof(resp))) |
642 | ret = -EFAULT; | |
643 | ||
644 | return ret; | |
645 | } | |
646 | ||
05ad9457 | 647 | static ssize_t ucma_bind_ip(struct ucma_file *file, const char __user *inbuf, |
75216638 SH |
648 | int in_len, int out_len) |
649 | { | |
05ad9457 | 650 | struct rdma_ucm_bind_ip cmd; |
75216638 SH |
651 | struct ucma_context *ctx; |
652 | int ret; | |
653 | ||
654 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
655 | return -EFAULT; | |
656 | ||
84652aef RD |
657 | if (!rdma_addr_size_in6(&cmd.addr)) |
658 | return -EINVAL; | |
659 | ||
75216638 SH |
660 | ctx = ucma_get_ctx(file, cmd.id); |
661 | if (IS_ERR(ctx)) | |
662 | return PTR_ERR(ctx); | |
663 | ||
664 | ret = rdma_bind_addr(ctx->cm_id, (struct sockaddr *) &cmd.addr); | |
665 | ucma_put_ctx(ctx); | |
666 | return ret; | |
667 | } | |
668 | ||
eebe4c3a SH |
669 | static ssize_t ucma_bind(struct ucma_file *file, const char __user *inbuf, |
670 | int in_len, int out_len) | |
671 | { | |
672 | struct rdma_ucm_bind cmd; | |
eebe4c3a SH |
673 | struct ucma_context *ctx; |
674 | int ret; | |
675 | ||
676 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
677 | return -EFAULT; | |
678 | ||
84652aef RD |
679 | if (cmd.reserved || !cmd.addr_size || |
680 | cmd.addr_size != rdma_addr_size_kss(&cmd.addr)) | |
eebe4c3a SH |
681 | return -EINVAL; |
682 | ||
683 | ctx = ucma_get_ctx(file, cmd.id); | |
684 | if (IS_ERR(ctx)) | |
685 | return PTR_ERR(ctx); | |
686 | ||
84652aef | 687 | ret = rdma_bind_addr(ctx->cm_id, (struct sockaddr *) &cmd.addr); |
eebe4c3a SH |
688 | ucma_put_ctx(ctx); |
689 | return ret; | |
690 | } | |
691 | ||
05ad9457 SH |
692 | static ssize_t ucma_resolve_ip(struct ucma_file *file, |
693 | const char __user *inbuf, | |
694 | int in_len, int out_len) | |
75216638 | 695 | { |
05ad9457 | 696 | struct rdma_ucm_resolve_ip cmd; |
75216638 SH |
697 | struct ucma_context *ctx; |
698 | int ret; | |
699 | ||
700 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
701 | return -EFAULT; | |
702 | ||
09abfe7b | 703 | if ((cmd.src_addr.sin6_family && !rdma_addr_size_in6(&cmd.src_addr)) || |
84652aef | 704 | !rdma_addr_size_in6(&cmd.dst_addr)) |
2975d5de LR |
705 | return -EINVAL; |
706 | ||
75216638 SH |
707 | ctx = ucma_get_ctx(file, cmd.id); |
708 | if (IS_ERR(ctx)) | |
709 | return PTR_ERR(ctx); | |
710 | ||
84652aef RD |
711 | ret = rdma_resolve_addr(ctx->cm_id, (struct sockaddr *) &cmd.src_addr, |
712 | (struct sockaddr *) &cmd.dst_addr, cmd.timeout_ms); | |
75216638 SH |
713 | ucma_put_ctx(ctx); |
714 | return ret; | |
715 | } | |
716 | ||
209cf2a7 SH |
717 | static ssize_t ucma_resolve_addr(struct ucma_file *file, |
718 | const char __user *inbuf, | |
719 | int in_len, int out_len) | |
720 | { | |
721 | struct rdma_ucm_resolve_addr cmd; | |
209cf2a7 SH |
722 | struct ucma_context *ctx; |
723 | int ret; | |
724 | ||
725 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
726 | return -EFAULT; | |
727 | ||
84652aef RD |
728 | if (cmd.reserved || |
729 | (cmd.src_size && (cmd.src_size != rdma_addr_size_kss(&cmd.src_addr))) || | |
730 | !cmd.dst_size || (cmd.dst_size != rdma_addr_size_kss(&cmd.dst_addr))) | |
209cf2a7 SH |
731 | return -EINVAL; |
732 | ||
733 | ctx = ucma_get_ctx(file, cmd.id); | |
734 | if (IS_ERR(ctx)) | |
735 | return PTR_ERR(ctx); | |
736 | ||
84652aef RD |
737 | ret = rdma_resolve_addr(ctx->cm_id, (struct sockaddr *) &cmd.src_addr, |
738 | (struct sockaddr *) &cmd.dst_addr, cmd.timeout_ms); | |
209cf2a7 SH |
739 | ucma_put_ctx(ctx); |
740 | return ret; | |
741 | } | |
742 | ||
75216638 SH |
743 | static ssize_t ucma_resolve_route(struct ucma_file *file, |
744 | const char __user *inbuf, | |
745 | int in_len, int out_len) | |
746 | { | |
747 | struct rdma_ucm_resolve_route cmd; | |
748 | struct ucma_context *ctx; | |
749 | int ret; | |
750 | ||
751 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
752 | return -EFAULT; | |
753 | ||
8b77586b | 754 | ctx = ucma_get_ctx_dev(file, cmd.id); |
75216638 SH |
755 | if (IS_ERR(ctx)) |
756 | return PTR_ERR(ctx); | |
757 | ||
758 | ret = rdma_resolve_route(ctx->cm_id, cmd.timeout_ms); | |
759 | ucma_put_ctx(ctx); | |
760 | return ret; | |
761 | } | |
762 | ||
763 | static void ucma_copy_ib_route(struct rdma_ucm_query_route_resp *resp, | |
764 | struct rdma_route *route) | |
765 | { | |
766 | struct rdma_dev_addr *dev_addr; | |
767 | ||
768 | resp->num_paths = route->num_paths; | |
769 | switch (route->num_paths) { | |
770 | case 0: | |
771 | dev_addr = &route->addr.dev_addr; | |
6f8372b6 SH |
772 | rdma_addr_get_dgid(dev_addr, |
773 | (union ib_gid *) &resp->ib_route[0].dgid); | |
774 | rdma_addr_get_sgid(dev_addr, | |
775 | (union ib_gid *) &resp->ib_route[0].sgid); | |
75216638 SH |
776 | resp->ib_route[0].pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); |
777 | break; | |
778 | case 2: | |
779 | ib_copy_path_rec_to_user(&resp->ib_route[1], | |
780 | &route->path_rec[1]); | |
781 | /* fall through */ | |
782 | case 1: | |
783 | ib_copy_path_rec_to_user(&resp->ib_route[0], | |
784 | &route->path_rec[0]); | |
785 | break; | |
786 | default: | |
787 | break; | |
788 | } | |
789 | } | |
790 | ||
3c86aa70 EC |
791 | static void ucma_copy_iboe_route(struct rdma_ucm_query_route_resp *resp, |
792 | struct rdma_route *route) | |
793 | { | |
3c86aa70 EC |
794 | |
795 | resp->num_paths = route->num_paths; | |
796 | switch (route->num_paths) { | |
797 | case 0: | |
7b85627b MS |
798 | rdma_ip2gid((struct sockaddr *)&route->addr.dst_addr, |
799 | (union ib_gid *)&resp->ib_route[0].dgid); | |
800 | rdma_ip2gid((struct sockaddr *)&route->addr.src_addr, | |
801 | (union ib_gid *)&resp->ib_route[0].sgid); | |
3c86aa70 EC |
802 | resp->ib_route[0].pkey = cpu_to_be16(0xffff); |
803 | break; | |
804 | case 2: | |
805 | ib_copy_path_rec_to_user(&resp->ib_route[1], | |
806 | &route->path_rec[1]); | |
807 | /* fall through */ | |
808 | case 1: | |
809 | ib_copy_path_rec_to_user(&resp->ib_route[0], | |
810 | &route->path_rec[0]); | |
811 | break; | |
812 | default: | |
813 | break; | |
814 | } | |
815 | } | |
816 | ||
e86f8b06 SW |
817 | static void ucma_copy_iw_route(struct rdma_ucm_query_route_resp *resp, |
818 | struct rdma_route *route) | |
819 | { | |
820 | struct rdma_dev_addr *dev_addr; | |
821 | ||
822 | dev_addr = &route->addr.dev_addr; | |
823 | rdma_addr_get_dgid(dev_addr, (union ib_gid *) &resp->ib_route[0].dgid); | |
824 | rdma_addr_get_sgid(dev_addr, (union ib_gid *) &resp->ib_route[0].sgid); | |
825 | } | |
826 | ||
75216638 SH |
827 | static ssize_t ucma_query_route(struct ucma_file *file, |
828 | const char __user *inbuf, | |
829 | int in_len, int out_len) | |
830 | { | |
ee7aed45 | 831 | struct rdma_ucm_query cmd; |
75216638 SH |
832 | struct rdma_ucm_query_route_resp resp; |
833 | struct ucma_context *ctx; | |
834 | struct sockaddr *addr; | |
835 | int ret = 0; | |
836 | ||
837 | if (out_len < sizeof(resp)) | |
838 | return -ENOSPC; | |
839 | ||
840 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
841 | return -EFAULT; | |
842 | ||
843 | ctx = ucma_get_ctx(file, cmd.id); | |
844 | if (IS_ERR(ctx)) | |
845 | return PTR_ERR(ctx); | |
846 | ||
847 | memset(&resp, 0, sizeof resp); | |
3f446754 | 848 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.src_addr; |
75216638 SH |
849 | memcpy(&resp.src_addr, addr, addr->sa_family == AF_INET ? |
850 | sizeof(struct sockaddr_in) : | |
851 | sizeof(struct sockaddr_in6)); | |
3f446754 | 852 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.dst_addr; |
75216638 SH |
853 | memcpy(&resp.dst_addr, addr, addr->sa_family == AF_INET ? |
854 | sizeof(struct sockaddr_in) : | |
855 | sizeof(struct sockaddr_in6)); | |
856 | if (!ctx->cm_id->device) | |
857 | goto out; | |
858 | ||
9cda779c | 859 | resp.node_guid = (__force __u64) ctx->cm_id->device->node_guid; |
75216638 | 860 | resp.port_num = ctx->cm_id->port_num; |
c72f2189 | 861 | |
fe53ba2f | 862 | if (rdma_cap_ib_sa(ctx->cm_id->device, ctx->cm_id->port_num)) |
c72f2189 | 863 | ucma_copy_ib_route(&resp, &ctx->cm_id->route); |
5d9fb044 | 864 | else if (rdma_protocol_roce(ctx->cm_id->device, ctx->cm_id->port_num)) |
c72f2189 MW |
865 | ucma_copy_iboe_route(&resp, &ctx->cm_id->route); |
866 | else if (rdma_protocol_iwarp(ctx->cm_id->device, ctx->cm_id->port_num)) | |
e86f8b06 | 867 | ucma_copy_iw_route(&resp, &ctx->cm_id->route); |
75216638 SH |
868 | |
869 | out: | |
6f57c933 | 870 | if (copy_to_user(u64_to_user_ptr(cmd.response), |
75216638 SH |
871 | &resp, sizeof(resp))) |
872 | ret = -EFAULT; | |
873 | ||
874 | ucma_put_ctx(ctx); | |
875 | return ret; | |
876 | } | |
877 | ||
ee7aed45 SH |
878 | static void ucma_query_device_addr(struct rdma_cm_id *cm_id, |
879 | struct rdma_ucm_query_addr_resp *resp) | |
880 | { | |
881 | if (!cm_id->device) | |
882 | return; | |
883 | ||
884 | resp->node_guid = (__force __u64) cm_id->device->node_guid; | |
885 | resp->port_num = cm_id->port_num; | |
886 | resp->pkey = (__force __u16) cpu_to_be16( | |
887 | ib_addr_get_pkey(&cm_id->route.addr.dev_addr)); | |
888 | } | |
889 | ||
890 | static ssize_t ucma_query_addr(struct ucma_context *ctx, | |
891 | void __user *response, int out_len) | |
892 | { | |
893 | struct rdma_ucm_query_addr_resp resp; | |
894 | struct sockaddr *addr; | |
895 | int ret = 0; | |
896 | ||
897 | if (out_len < sizeof(resp)) | |
898 | return -ENOSPC; | |
899 | ||
900 | memset(&resp, 0, sizeof resp); | |
901 | ||
902 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.src_addr; | |
903 | resp.src_size = rdma_addr_size(addr); | |
904 | memcpy(&resp.src_addr, addr, resp.src_size); | |
905 | ||
906 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.dst_addr; | |
907 | resp.dst_size = rdma_addr_size(addr); | |
908 | memcpy(&resp.dst_addr, addr, resp.dst_size); | |
909 | ||
910 | ucma_query_device_addr(ctx->cm_id, &resp); | |
911 | ||
912 | if (copy_to_user(response, &resp, sizeof(resp))) | |
913 | ret = -EFAULT; | |
914 | ||
915 | return ret; | |
916 | } | |
917 | ||
ac53b264 SH |
918 | static ssize_t ucma_query_path(struct ucma_context *ctx, |
919 | void __user *response, int out_len) | |
920 | { | |
921 | struct rdma_ucm_query_path_resp *resp; | |
922 | int i, ret = 0; | |
923 | ||
924 | if (out_len < sizeof(*resp)) | |
925 | return -ENOSPC; | |
926 | ||
927 | resp = kzalloc(out_len, GFP_KERNEL); | |
928 | if (!resp) | |
929 | return -ENOMEM; | |
930 | ||
931 | resp->num_paths = ctx->cm_id->route.num_paths; | |
932 | for (i = 0, out_len -= sizeof(*resp); | |
933 | i < resp->num_paths && out_len > sizeof(struct ib_path_rec_data); | |
934 | i++, out_len -= sizeof(struct ib_path_rec_data)) { | |
57520751 | 935 | struct sa_path_rec *rec = &ctx->cm_id->route.path_rec[i]; |
ac53b264 SH |
936 | |
937 | resp->path_data[i].flags = IB_PATH_GMP | IB_PATH_PRIMARY | | |
938 | IB_PATH_BIDIRECTIONAL; | |
89838118 | 939 | if (rec->rec_type == SA_PATH_REC_TYPE_OPA) { |
57520751 DC |
940 | struct sa_path_rec ib; |
941 | ||
942 | sa_convert_path_opa_to_ib(&ib, rec); | |
943 | ib_sa_pack_path(&ib, &resp->path_data[i].path_rec); | |
89838118 PP |
944 | |
945 | } else { | |
946 | ib_sa_pack_path(rec, &resp->path_data[i].path_rec); | |
57520751 | 947 | } |
ac53b264 SH |
948 | } |
949 | ||
950 | if (copy_to_user(response, resp, | |
951 | sizeof(*resp) + (i * sizeof(struct ib_path_rec_data)))) | |
952 | ret = -EFAULT; | |
953 | ||
954 | kfree(resp); | |
955 | return ret; | |
956 | } | |
957 | ||
edaa7a55 SH |
958 | static ssize_t ucma_query_gid(struct ucma_context *ctx, |
959 | void __user *response, int out_len) | |
960 | { | |
961 | struct rdma_ucm_query_addr_resp resp; | |
962 | struct sockaddr_ib *addr; | |
963 | int ret = 0; | |
964 | ||
965 | if (out_len < sizeof(resp)) | |
966 | return -ENOSPC; | |
967 | ||
968 | memset(&resp, 0, sizeof resp); | |
969 | ||
970 | ucma_query_device_addr(ctx->cm_id, &resp); | |
971 | ||
972 | addr = (struct sockaddr_ib *) &resp.src_addr; | |
973 | resp.src_size = sizeof(*addr); | |
974 | if (ctx->cm_id->route.addr.src_addr.ss_family == AF_IB) { | |
975 | memcpy(addr, &ctx->cm_id->route.addr.src_addr, resp.src_size); | |
976 | } else { | |
977 | addr->sib_family = AF_IB; | |
978 | addr->sib_pkey = (__force __be16) resp.pkey; | |
7a2f64ee PP |
979 | rdma_read_gids(ctx->cm_id, (union ib_gid *)&addr->sib_addr, |
980 | NULL); | |
edaa7a55 SH |
981 | addr->sib_sid = rdma_get_service_id(ctx->cm_id, (struct sockaddr *) |
982 | &ctx->cm_id->route.addr.src_addr); | |
983 | } | |
984 | ||
985 | addr = (struct sockaddr_ib *) &resp.dst_addr; | |
986 | resp.dst_size = sizeof(*addr); | |
987 | if (ctx->cm_id->route.addr.dst_addr.ss_family == AF_IB) { | |
988 | memcpy(addr, &ctx->cm_id->route.addr.dst_addr, resp.dst_size); | |
989 | } else { | |
990 | addr->sib_family = AF_IB; | |
991 | addr->sib_pkey = (__force __be16) resp.pkey; | |
7a2f64ee PP |
992 | rdma_read_gids(ctx->cm_id, NULL, |
993 | (union ib_gid *)&addr->sib_addr); | |
edaa7a55 SH |
994 | addr->sib_sid = rdma_get_service_id(ctx->cm_id, (struct sockaddr *) |
995 | &ctx->cm_id->route.addr.dst_addr); | |
996 | } | |
997 | ||
998 | if (copy_to_user(response, &resp, sizeof(resp))) | |
999 | ret = -EFAULT; | |
1000 | ||
1001 | return ret; | |
1002 | } | |
1003 | ||
ee7aed45 SH |
1004 | static ssize_t ucma_query(struct ucma_file *file, |
1005 | const char __user *inbuf, | |
1006 | int in_len, int out_len) | |
1007 | { | |
1008 | struct rdma_ucm_query cmd; | |
1009 | struct ucma_context *ctx; | |
1010 | void __user *response; | |
1011 | int ret; | |
1012 | ||
1013 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1014 | return -EFAULT; | |
1015 | ||
6f57c933 | 1016 | response = u64_to_user_ptr(cmd.response); |
ee7aed45 SH |
1017 | ctx = ucma_get_ctx(file, cmd.id); |
1018 | if (IS_ERR(ctx)) | |
1019 | return PTR_ERR(ctx); | |
1020 | ||
1021 | switch (cmd.option) { | |
1022 | case RDMA_USER_CM_QUERY_ADDR: | |
1023 | ret = ucma_query_addr(ctx, response, out_len); | |
1024 | break; | |
ac53b264 SH |
1025 | case RDMA_USER_CM_QUERY_PATH: |
1026 | ret = ucma_query_path(ctx, response, out_len); | |
1027 | break; | |
edaa7a55 SH |
1028 | case RDMA_USER_CM_QUERY_GID: |
1029 | ret = ucma_query_gid(ctx, response, out_len); | |
1030 | break; | |
ee7aed45 SH |
1031 | default: |
1032 | ret = -ENOSYS; | |
1033 | break; | |
1034 | } | |
1035 | ||
1036 | ucma_put_ctx(ctx); | |
1037 | return ret; | |
1038 | } | |
1039 | ||
5c438135 SH |
1040 | static void ucma_copy_conn_param(struct rdma_cm_id *id, |
1041 | struct rdma_conn_param *dst, | |
75216638 SH |
1042 | struct rdma_ucm_conn_param *src) |
1043 | { | |
1044 | dst->private_data = src->private_data; | |
1045 | dst->private_data_len = src->private_data_len; | |
1046 | dst->responder_resources =src->responder_resources; | |
1047 | dst->initiator_depth = src->initiator_depth; | |
1048 | dst->flow_control = src->flow_control; | |
1049 | dst->retry_count = src->retry_count; | |
1050 | dst->rnr_retry_count = src->rnr_retry_count; | |
1051 | dst->srq = src->srq; | |
1052 | dst->qp_num = src->qp_num; | |
5c438135 | 1053 | dst->qkey = (id->route.addr.src_addr.ss_family == AF_IB) ? src->qkey : 0; |
75216638 SH |
1054 | } |
1055 | ||
1056 | static ssize_t ucma_connect(struct ucma_file *file, const char __user *inbuf, | |
1057 | int in_len, int out_len) | |
1058 | { | |
1059 | struct rdma_ucm_connect cmd; | |
1060 | struct rdma_conn_param conn_param; | |
1061 | struct ucma_context *ctx; | |
1062 | int ret; | |
1063 | ||
1064 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1065 | return -EFAULT; | |
1066 | ||
1067 | if (!cmd.conn_param.valid) | |
1068 | return -EINVAL; | |
1069 | ||
8b77586b | 1070 | ctx = ucma_get_ctx_dev(file, cmd.id); |
75216638 SH |
1071 | if (IS_ERR(ctx)) |
1072 | return PTR_ERR(ctx); | |
1073 | ||
5c438135 | 1074 | ucma_copy_conn_param(ctx->cm_id, &conn_param, &cmd.conn_param); |
75216638 SH |
1075 | ret = rdma_connect(ctx->cm_id, &conn_param); |
1076 | ucma_put_ctx(ctx); | |
1077 | return ret; | |
1078 | } | |
1079 | ||
1080 | static ssize_t ucma_listen(struct ucma_file *file, const char __user *inbuf, | |
1081 | int in_len, int out_len) | |
1082 | { | |
1083 | struct rdma_ucm_listen cmd; | |
1084 | struct ucma_context *ctx; | |
1085 | int ret; | |
1086 | ||
1087 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1088 | return -EFAULT; | |
1089 | ||
1090 | ctx = ucma_get_ctx(file, cmd.id); | |
1091 | if (IS_ERR(ctx)) | |
1092 | return PTR_ERR(ctx); | |
1093 | ||
97cb7e40 SW |
1094 | ctx->backlog = cmd.backlog > 0 && cmd.backlog < max_backlog ? |
1095 | cmd.backlog : max_backlog; | |
75216638 SH |
1096 | ret = rdma_listen(ctx->cm_id, ctx->backlog); |
1097 | ucma_put_ctx(ctx); | |
1098 | return ret; | |
1099 | } | |
1100 | ||
1101 | static ssize_t ucma_accept(struct ucma_file *file, const char __user *inbuf, | |
1102 | int in_len, int out_len) | |
1103 | { | |
1104 | struct rdma_ucm_accept cmd; | |
1105 | struct rdma_conn_param conn_param; | |
1106 | struct ucma_context *ctx; | |
1107 | int ret; | |
1108 | ||
1109 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1110 | return -EFAULT; | |
1111 | ||
8b77586b | 1112 | ctx = ucma_get_ctx_dev(file, cmd.id); |
75216638 SH |
1113 | if (IS_ERR(ctx)) |
1114 | return PTR_ERR(ctx); | |
1115 | ||
1116 | if (cmd.conn_param.valid) { | |
5c438135 | 1117 | ucma_copy_conn_param(ctx->cm_id, &conn_param, &cmd.conn_param); |
9ced69ca | 1118 | mutex_lock(&file->mut); |
00313983 | 1119 | ret = __rdma_accept(ctx->cm_id, &conn_param, NULL); |
9ced69ca SH |
1120 | if (!ret) |
1121 | ctx->uid = cmd.uid; | |
1122 | mutex_unlock(&file->mut); | |
75216638 | 1123 | } else |
00313983 | 1124 | ret = __rdma_accept(ctx->cm_id, NULL, NULL); |
75216638 SH |
1125 | |
1126 | ucma_put_ctx(ctx); | |
1127 | return ret; | |
1128 | } | |
1129 | ||
1130 | static ssize_t ucma_reject(struct ucma_file *file, const char __user *inbuf, | |
1131 | int in_len, int out_len) | |
1132 | { | |
1133 | struct rdma_ucm_reject cmd; | |
1134 | struct ucma_context *ctx; | |
1135 | int ret; | |
1136 | ||
1137 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1138 | return -EFAULT; | |
1139 | ||
8b77586b | 1140 | ctx = ucma_get_ctx_dev(file, cmd.id); |
75216638 SH |
1141 | if (IS_ERR(ctx)) |
1142 | return PTR_ERR(ctx); | |
1143 | ||
1144 | ret = rdma_reject(ctx->cm_id, cmd.private_data, cmd.private_data_len); | |
1145 | ucma_put_ctx(ctx); | |
1146 | return ret; | |
1147 | } | |
1148 | ||
1149 | static ssize_t ucma_disconnect(struct ucma_file *file, const char __user *inbuf, | |
1150 | int in_len, int out_len) | |
1151 | { | |
1152 | struct rdma_ucm_disconnect cmd; | |
1153 | struct ucma_context *ctx; | |
1154 | int ret; | |
1155 | ||
1156 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1157 | return -EFAULT; | |
1158 | ||
8b77586b | 1159 | ctx = ucma_get_ctx_dev(file, cmd.id); |
75216638 SH |
1160 | if (IS_ERR(ctx)) |
1161 | return PTR_ERR(ctx); | |
1162 | ||
1163 | ret = rdma_disconnect(ctx->cm_id); | |
1164 | ucma_put_ctx(ctx); | |
1165 | return ret; | |
1166 | } | |
1167 | ||
1168 | static ssize_t ucma_init_qp_attr(struct ucma_file *file, | |
1169 | const char __user *inbuf, | |
1170 | int in_len, int out_len) | |
1171 | { | |
1172 | struct rdma_ucm_init_qp_attr cmd; | |
1173 | struct ib_uverbs_qp_attr resp; | |
1174 | struct ucma_context *ctx; | |
1175 | struct ib_qp_attr qp_attr; | |
1176 | int ret; | |
1177 | ||
1178 | if (out_len < sizeof(resp)) | |
1179 | return -ENOSPC; | |
1180 | ||
1181 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1182 | return -EFAULT; | |
1183 | ||
a5880b84 LR |
1184 | if (cmd.qp_state > IB_QPS_ERR) |
1185 | return -EINVAL; | |
1186 | ||
8b77586b | 1187 | ctx = ucma_get_ctx_dev(file, cmd.id); |
75216638 SH |
1188 | if (IS_ERR(ctx)) |
1189 | return PTR_ERR(ctx); | |
1190 | ||
1191 | resp.qp_attr_mask = 0; | |
1192 | memset(&qp_attr, 0, sizeof qp_attr); | |
1193 | qp_attr.qp_state = cmd.qp_state; | |
1194 | ret = rdma_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask); | |
1195 | if (ret) | |
1196 | goto out; | |
1197 | ||
d541e455 | 1198 | ib_copy_qp_attr_to_user(ctx->cm_id->device, &resp, &qp_attr); |
6f57c933 | 1199 | if (copy_to_user(u64_to_user_ptr(cmd.response), |
75216638 SH |
1200 | &resp, sizeof(resp))) |
1201 | ret = -EFAULT; | |
1202 | ||
1203 | out: | |
1204 | ucma_put_ctx(ctx); | |
1205 | return ret; | |
1206 | } | |
1207 | ||
7ce86409 SH |
1208 | static int ucma_set_option_id(struct ucma_context *ctx, int optname, |
1209 | void *optval, size_t optlen) | |
1210 | { | |
1211 | int ret = 0; | |
1212 | ||
1213 | switch (optname) { | |
1214 | case RDMA_OPTION_ID_TOS: | |
1215 | if (optlen != sizeof(u8)) { | |
1216 | ret = -EINVAL; | |
1217 | break; | |
1218 | } | |
1219 | rdma_set_service_type(ctx->cm_id, *((u8 *) optval)); | |
1220 | break; | |
a9bb7912 HS |
1221 | case RDMA_OPTION_ID_REUSEADDR: |
1222 | if (optlen != sizeof(int)) { | |
1223 | ret = -EINVAL; | |
1224 | break; | |
1225 | } | |
1226 | ret = rdma_set_reuseaddr(ctx->cm_id, *((int *) optval) ? 1 : 0); | |
1227 | break; | |
68602120 SH |
1228 | case RDMA_OPTION_ID_AFONLY: |
1229 | if (optlen != sizeof(int)) { | |
1230 | ret = -EINVAL; | |
1231 | break; | |
1232 | } | |
1233 | ret = rdma_set_afonly(ctx->cm_id, *((int *) optval) ? 1 : 0); | |
1234 | break; | |
7ce86409 SH |
1235 | default: |
1236 | ret = -ENOSYS; | |
1237 | } | |
1238 | ||
1239 | return ret; | |
1240 | } | |
1241 | ||
a7ca1f00 SH |
1242 | static int ucma_set_ib_path(struct ucma_context *ctx, |
1243 | struct ib_path_rec_data *path_data, size_t optlen) | |
1244 | { | |
c2f8fc4e | 1245 | struct sa_path_rec sa_path; |
a7ca1f00 SH |
1246 | struct rdma_cm_event event; |
1247 | int ret; | |
1248 | ||
1249 | if (optlen % sizeof(*path_data)) | |
1250 | return -EINVAL; | |
1251 | ||
1252 | for (; optlen; optlen -= sizeof(*path_data), path_data++) { | |
1253 | if (path_data->flags == (IB_PATH_GMP | IB_PATH_PRIMARY | | |
1254 | IB_PATH_BIDIRECTIONAL)) | |
1255 | break; | |
1256 | } | |
1257 | ||
1258 | if (!optlen) | |
1259 | return -EINVAL; | |
1260 | ||
8435168d RD |
1261 | if (!ctx->cm_id->device) |
1262 | return -EINVAL; | |
1263 | ||
c2be9dc0 | 1264 | memset(&sa_path, 0, sizeof(sa_path)); |
c2be9dc0 | 1265 | |
57520751 | 1266 | sa_path.rec_type = SA_PATH_REC_TYPE_IB; |
a7ca1f00 | 1267 | ib_sa_unpack_path(path_data->path_rec, &sa_path); |
57520751 DC |
1268 | |
1269 | if (rdma_cap_opa_ah(ctx->cm_id->device, ctx->cm_id->port_num)) { | |
1270 | struct sa_path_rec opa; | |
1271 | ||
1272 | sa_convert_path_ib_to_opa(&opa, &sa_path); | |
fe75889f | 1273 | ret = rdma_set_ib_path(ctx->cm_id, &opa); |
57520751 | 1274 | } else { |
fe75889f | 1275 | ret = rdma_set_ib_path(ctx->cm_id, &sa_path); |
57520751 | 1276 | } |
a7ca1f00 SH |
1277 | if (ret) |
1278 | return ret; | |
1279 | ||
1280 | memset(&event, 0, sizeof event); | |
1281 | event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; | |
1282 | return ucma_event_handler(ctx->cm_id, &event); | |
1283 | } | |
1284 | ||
1285 | static int ucma_set_option_ib(struct ucma_context *ctx, int optname, | |
1286 | void *optval, size_t optlen) | |
1287 | { | |
1288 | int ret; | |
1289 | ||
1290 | switch (optname) { | |
1291 | case RDMA_OPTION_IB_PATH: | |
1292 | ret = ucma_set_ib_path(ctx, optval, optlen); | |
1293 | break; | |
1294 | default: | |
1295 | ret = -ENOSYS; | |
1296 | } | |
1297 | ||
1298 | return ret; | |
1299 | } | |
1300 | ||
7ce86409 SH |
1301 | static int ucma_set_option_level(struct ucma_context *ctx, int level, |
1302 | int optname, void *optval, size_t optlen) | |
1303 | { | |
1304 | int ret; | |
1305 | ||
1306 | switch (level) { | |
1307 | case RDMA_OPTION_ID: | |
1308 | ret = ucma_set_option_id(ctx, optname, optval, optlen); | |
1309 | break; | |
a7ca1f00 SH |
1310 | case RDMA_OPTION_IB: |
1311 | ret = ucma_set_option_ib(ctx, optname, optval, optlen); | |
1312 | break; | |
7ce86409 SH |
1313 | default: |
1314 | ret = -ENOSYS; | |
1315 | } | |
1316 | ||
1317 | return ret; | |
1318 | } | |
1319 | ||
1320 | static ssize_t ucma_set_option(struct ucma_file *file, const char __user *inbuf, | |
1321 | int in_len, int out_len) | |
1322 | { | |
1323 | struct rdma_ucm_set_option cmd; | |
1324 | struct ucma_context *ctx; | |
1325 | void *optval; | |
1326 | int ret; | |
1327 | ||
1328 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1329 | return -EFAULT; | |
1330 | ||
ef95a90a SR |
1331 | if (unlikely(cmd.optlen > KMALLOC_MAX_SIZE)) |
1332 | return -EINVAL; | |
1333 | ||
7ce86409 SH |
1334 | ctx = ucma_get_ctx(file, cmd.id); |
1335 | if (IS_ERR(ctx)) | |
1336 | return PTR_ERR(ctx); | |
1337 | ||
6f57c933 | 1338 | optval = memdup_user(u64_to_user_ptr(cmd.optval), |
0764c76e RD |
1339 | cmd.optlen); |
1340 | if (IS_ERR(optval)) { | |
1341 | ret = PTR_ERR(optval); | |
1342 | goto out; | |
7ce86409 SH |
1343 | } |
1344 | ||
1345 | ret = ucma_set_option_level(ctx, cmd.level, cmd.optname, optval, | |
1346 | cmd.optlen); | |
7ce86409 | 1347 | kfree(optval); |
0764c76e RD |
1348 | |
1349 | out: | |
7ce86409 SH |
1350 | ucma_put_ctx(ctx); |
1351 | return ret; | |
1352 | } | |
1353 | ||
75216638 SH |
1354 | static ssize_t ucma_notify(struct ucma_file *file, const char __user *inbuf, |
1355 | int in_len, int out_len) | |
1356 | { | |
1357 | struct rdma_ucm_notify cmd; | |
1358 | struct ucma_context *ctx; | |
c8d3bcbf | 1359 | int ret = -EINVAL; |
75216638 SH |
1360 | |
1361 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1362 | return -EFAULT; | |
1363 | ||
1364 | ctx = ucma_get_ctx(file, cmd.id); | |
1365 | if (IS_ERR(ctx)) | |
1366 | return PTR_ERR(ctx); | |
1367 | ||
c8d3bcbf LR |
1368 | if (ctx->cm_id->device) |
1369 | ret = rdma_notify(ctx->cm_id, (enum ib_event_type)cmd.event); | |
1370 | ||
75216638 SH |
1371 | ucma_put_ctx(ctx); |
1372 | return ret; | |
1373 | } | |
1374 | ||
5bc2b7b3 SH |
1375 | static ssize_t ucma_process_join(struct ucma_file *file, |
1376 | struct rdma_ucm_join_mcast *cmd, int out_len) | |
c8f6a362 | 1377 | { |
c8f6a362 SH |
1378 | struct rdma_ucm_create_id_resp resp; |
1379 | struct ucma_context *ctx; | |
1380 | struct ucma_multicast *mc; | |
5bc2b7b3 | 1381 | struct sockaddr *addr; |
c8f6a362 | 1382 | int ret; |
ab15c95a | 1383 | u8 join_state; |
c8f6a362 SH |
1384 | |
1385 | if (out_len < sizeof(resp)) | |
1386 | return -ENOSPC; | |
1387 | ||
5bc2b7b3 | 1388 | addr = (struct sockaddr *) &cmd->addr; |
0c81ffc6 | 1389 | if (cmd->addr_size != rdma_addr_size(addr)) |
ab15c95a AV |
1390 | return -EINVAL; |
1391 | ||
1392 | if (cmd->join_flags == RDMA_MC_JOIN_FLAG_FULLMEMBER) | |
1393 | join_state = BIT(FULLMEMBER_JOIN); | |
1394 | else if (cmd->join_flags == RDMA_MC_JOIN_FLAG_SENDONLY_FULLMEMBER) | |
1395 | join_state = BIT(SENDONLY_FULLMEMBER_JOIN); | |
1396 | else | |
5bc2b7b3 | 1397 | return -EINVAL; |
c8f6a362 | 1398 | |
8b77586b | 1399 | ctx = ucma_get_ctx_dev(file, cmd->id); |
c8f6a362 SH |
1400 | if (IS_ERR(ctx)) |
1401 | return PTR_ERR(ctx); | |
1402 | ||
1403 | mutex_lock(&file->mut); | |
1404 | mc = ucma_alloc_multicast(ctx); | |
6aea938f JB |
1405 | if (!mc) { |
1406 | ret = -ENOMEM; | |
c8f6a362 SH |
1407 | goto err1; |
1408 | } | |
ab15c95a | 1409 | mc->join_state = join_state; |
5bc2b7b3 SH |
1410 | mc->uid = cmd->uid; |
1411 | memcpy(&mc->addr, addr, cmd->addr_size); | |
ab15c95a AV |
1412 | ret = rdma_join_multicast(ctx->cm_id, (struct sockaddr *)&mc->addr, |
1413 | join_state, mc); | |
c8f6a362 SH |
1414 | if (ret) |
1415 | goto err2; | |
1416 | ||
1417 | resp.id = mc->id; | |
6f57c933 | 1418 | if (copy_to_user(u64_to_user_ptr(cmd->response), |
c8f6a362 SH |
1419 | &resp, sizeof(resp))) { |
1420 | ret = -EFAULT; | |
1421 | goto err3; | |
1422 | } | |
1423 | ||
1424 | mutex_unlock(&file->mut); | |
1425 | ucma_put_ctx(ctx); | |
1426 | return 0; | |
1427 | ||
1428 | err3: | |
3f446754 | 1429 | rdma_leave_multicast(ctx->cm_id, (struct sockaddr *) &mc->addr); |
c8f6a362 SH |
1430 | ucma_cleanup_mc_events(mc); |
1431 | err2: | |
1432 | mutex_lock(&mut); | |
1433 | idr_remove(&multicast_idr, mc->id); | |
1434 | mutex_unlock(&mut); | |
1435 | list_del(&mc->list); | |
1436 | kfree(mc); | |
1437 | err1: | |
1438 | mutex_unlock(&file->mut); | |
1439 | ucma_put_ctx(ctx); | |
1440 | return ret; | |
1441 | } | |
1442 | ||
5bc2b7b3 SH |
1443 | static ssize_t ucma_join_ip_multicast(struct ucma_file *file, |
1444 | const char __user *inbuf, | |
1445 | int in_len, int out_len) | |
1446 | { | |
1447 | struct rdma_ucm_join_ip_mcast cmd; | |
1448 | struct rdma_ucm_join_mcast join_cmd; | |
1449 | ||
1450 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1451 | return -EFAULT; | |
1452 | ||
1453 | join_cmd.response = cmd.response; | |
1454 | join_cmd.uid = cmd.uid; | |
1455 | join_cmd.id = cmd.id; | |
84652aef | 1456 | join_cmd.addr_size = rdma_addr_size_in6(&cmd.addr); |
0c81ffc6 LR |
1457 | if (!join_cmd.addr_size) |
1458 | return -EINVAL; | |
1459 | ||
ab15c95a | 1460 | join_cmd.join_flags = RDMA_MC_JOIN_FLAG_FULLMEMBER; |
5bc2b7b3 SH |
1461 | memcpy(&join_cmd.addr, &cmd.addr, join_cmd.addr_size); |
1462 | ||
1463 | return ucma_process_join(file, &join_cmd, out_len); | |
1464 | } | |
1465 | ||
1466 | static ssize_t ucma_join_multicast(struct ucma_file *file, | |
1467 | const char __user *inbuf, | |
1468 | int in_len, int out_len) | |
1469 | { | |
1470 | struct rdma_ucm_join_mcast cmd; | |
1471 | ||
1472 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1473 | return -EFAULT; | |
1474 | ||
84652aef | 1475 | if (!rdma_addr_size_kss(&cmd.addr)) |
0c81ffc6 LR |
1476 | return -EINVAL; |
1477 | ||
5bc2b7b3 SH |
1478 | return ucma_process_join(file, &cmd, out_len); |
1479 | } | |
1480 | ||
c8f6a362 SH |
1481 | static ssize_t ucma_leave_multicast(struct ucma_file *file, |
1482 | const char __user *inbuf, | |
1483 | int in_len, int out_len) | |
1484 | { | |
1485 | struct rdma_ucm_destroy_id cmd; | |
1486 | struct rdma_ucm_destroy_id_resp resp; | |
1487 | struct ucma_multicast *mc; | |
1488 | int ret = 0; | |
1489 | ||
1490 | if (out_len < sizeof(resp)) | |
1491 | return -ENOSPC; | |
1492 | ||
1493 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1494 | return -EFAULT; | |
1495 | ||
1496 | mutex_lock(&mut); | |
1497 | mc = idr_find(&multicast_idr, cmd.id); | |
1498 | if (!mc) | |
1499 | mc = ERR_PTR(-ENOENT); | |
1500 | else if (mc->ctx->file != file) | |
1501 | mc = ERR_PTR(-EINVAL); | |
7e967fd0 JG |
1502 | else if (!atomic_inc_not_zero(&mc->ctx->ref)) |
1503 | mc = ERR_PTR(-ENXIO); | |
1504 | else | |
c8f6a362 | 1505 | idr_remove(&multicast_idr, mc->id); |
c8f6a362 SH |
1506 | mutex_unlock(&mut); |
1507 | ||
1508 | if (IS_ERR(mc)) { | |
1509 | ret = PTR_ERR(mc); | |
1510 | goto out; | |
1511 | } | |
1512 | ||
3f446754 | 1513 | rdma_leave_multicast(mc->ctx->cm_id, (struct sockaddr *) &mc->addr); |
c8f6a362 SH |
1514 | mutex_lock(&mc->ctx->file->mut); |
1515 | ucma_cleanup_mc_events(mc); | |
1516 | list_del(&mc->list); | |
1517 | mutex_unlock(&mc->ctx->file->mut); | |
1518 | ||
1519 | ucma_put_ctx(mc->ctx); | |
1520 | resp.events_reported = mc->events_reported; | |
1521 | kfree(mc); | |
1522 | ||
6f57c933 | 1523 | if (copy_to_user(u64_to_user_ptr(cmd.response), |
c8f6a362 SH |
1524 | &resp, sizeof(resp))) |
1525 | ret = -EFAULT; | |
1526 | out: | |
1527 | return ret; | |
1528 | } | |
1529 | ||
88314e4d SH |
1530 | static void ucma_lock_files(struct ucma_file *file1, struct ucma_file *file2) |
1531 | { | |
1532 | /* Acquire mutex's based on pointer comparison to prevent deadlock. */ | |
1533 | if (file1 < file2) { | |
1534 | mutex_lock(&file1->mut); | |
31b57b87 | 1535 | mutex_lock_nested(&file2->mut, SINGLE_DEPTH_NESTING); |
88314e4d SH |
1536 | } else { |
1537 | mutex_lock(&file2->mut); | |
31b57b87 | 1538 | mutex_lock_nested(&file1->mut, SINGLE_DEPTH_NESTING); |
88314e4d SH |
1539 | } |
1540 | } | |
1541 | ||
1542 | static void ucma_unlock_files(struct ucma_file *file1, struct ucma_file *file2) | |
1543 | { | |
1544 | if (file1 < file2) { | |
1545 | mutex_unlock(&file2->mut); | |
1546 | mutex_unlock(&file1->mut); | |
1547 | } else { | |
1548 | mutex_unlock(&file1->mut); | |
1549 | mutex_unlock(&file2->mut); | |
1550 | } | |
1551 | } | |
1552 | ||
1553 | static void ucma_move_events(struct ucma_context *ctx, struct ucma_file *file) | |
1554 | { | |
1555 | struct ucma_event *uevent, *tmp; | |
1556 | ||
1557 | list_for_each_entry_safe(uevent, tmp, &ctx->file->event_list, list) | |
1558 | if (uevent->ctx == ctx) | |
1559 | list_move_tail(&uevent->list, &file->event_list); | |
1560 | } | |
1561 | ||
1562 | static ssize_t ucma_migrate_id(struct ucma_file *new_file, | |
1563 | const char __user *inbuf, | |
1564 | int in_len, int out_len) | |
1565 | { | |
1566 | struct rdma_ucm_migrate_id cmd; | |
1567 | struct rdma_ucm_migrate_resp resp; | |
1568 | struct ucma_context *ctx; | |
2903ff01 | 1569 | struct fd f; |
88314e4d SH |
1570 | struct ucma_file *cur_file; |
1571 | int ret = 0; | |
1572 | ||
1573 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1574 | return -EFAULT; | |
1575 | ||
1576 | /* Get current fd to protect against it being closed */ | |
2903ff01 AV |
1577 | f = fdget(cmd.fd); |
1578 | if (!f.file) | |
88314e4d SH |
1579 | return -ENOENT; |
1580 | ||
1581 | /* Validate current fd and prevent destruction of id. */ | |
2903ff01 | 1582 | ctx = ucma_get_ctx(f.file->private_data, cmd.id); |
88314e4d SH |
1583 | if (IS_ERR(ctx)) { |
1584 | ret = PTR_ERR(ctx); | |
1585 | goto file_put; | |
1586 | } | |
1587 | ||
1588 | cur_file = ctx->file; | |
1589 | if (cur_file == new_file) { | |
1590 | resp.events_reported = ctx->events_reported; | |
1591 | goto response; | |
1592 | } | |
1593 | ||
1594 | /* | |
1595 | * Migrate events between fd's, maintaining order, and avoiding new | |
1596 | * events being added before existing events. | |
1597 | */ | |
1598 | ucma_lock_files(cur_file, new_file); | |
1599 | mutex_lock(&mut); | |
1600 | ||
1601 | list_move_tail(&ctx->list, &new_file->ctx_list); | |
1602 | ucma_move_events(ctx, new_file); | |
1603 | ctx->file = new_file; | |
1604 | resp.events_reported = ctx->events_reported; | |
1605 | ||
1606 | mutex_unlock(&mut); | |
1607 | ucma_unlock_files(cur_file, new_file); | |
1608 | ||
1609 | response: | |
6f57c933 | 1610 | if (copy_to_user(u64_to_user_ptr(cmd.response), |
88314e4d SH |
1611 | &resp, sizeof(resp))) |
1612 | ret = -EFAULT; | |
1613 | ||
1614 | ucma_put_ctx(ctx); | |
1615 | file_put: | |
2903ff01 | 1616 | fdput(f); |
88314e4d SH |
1617 | return ret; |
1618 | } | |
1619 | ||
75216638 SH |
1620 | static ssize_t (*ucma_cmd_table[])(struct ucma_file *file, |
1621 | const char __user *inbuf, | |
1622 | int in_len, int out_len) = { | |
05ad9457 SH |
1623 | [RDMA_USER_CM_CMD_CREATE_ID] = ucma_create_id, |
1624 | [RDMA_USER_CM_CMD_DESTROY_ID] = ucma_destroy_id, | |
1625 | [RDMA_USER_CM_CMD_BIND_IP] = ucma_bind_ip, | |
1626 | [RDMA_USER_CM_CMD_RESOLVE_IP] = ucma_resolve_ip, | |
1627 | [RDMA_USER_CM_CMD_RESOLVE_ROUTE] = ucma_resolve_route, | |
1628 | [RDMA_USER_CM_CMD_QUERY_ROUTE] = ucma_query_route, | |
1629 | [RDMA_USER_CM_CMD_CONNECT] = ucma_connect, | |
1630 | [RDMA_USER_CM_CMD_LISTEN] = ucma_listen, | |
1631 | [RDMA_USER_CM_CMD_ACCEPT] = ucma_accept, | |
1632 | [RDMA_USER_CM_CMD_REJECT] = ucma_reject, | |
1633 | [RDMA_USER_CM_CMD_DISCONNECT] = ucma_disconnect, | |
1634 | [RDMA_USER_CM_CMD_INIT_QP_ATTR] = ucma_init_qp_attr, | |
1635 | [RDMA_USER_CM_CMD_GET_EVENT] = ucma_get_event, | |
1636 | [RDMA_USER_CM_CMD_GET_OPTION] = NULL, | |
1637 | [RDMA_USER_CM_CMD_SET_OPTION] = ucma_set_option, | |
1638 | [RDMA_USER_CM_CMD_NOTIFY] = ucma_notify, | |
1639 | [RDMA_USER_CM_CMD_JOIN_IP_MCAST] = ucma_join_ip_multicast, | |
1640 | [RDMA_USER_CM_CMD_LEAVE_MCAST] = ucma_leave_multicast, | |
1641 | [RDMA_USER_CM_CMD_MIGRATE_ID] = ucma_migrate_id, | |
eebe4c3a | 1642 | [RDMA_USER_CM_CMD_QUERY] = ucma_query, |
209cf2a7 | 1643 | [RDMA_USER_CM_CMD_BIND] = ucma_bind, |
5bc2b7b3 SH |
1644 | [RDMA_USER_CM_CMD_RESOLVE_ADDR] = ucma_resolve_addr, |
1645 | [RDMA_USER_CM_CMD_JOIN_MCAST] = ucma_join_multicast | |
75216638 SH |
1646 | }; |
1647 | ||
1648 | static ssize_t ucma_write(struct file *filp, const char __user *buf, | |
1649 | size_t len, loff_t *pos) | |
1650 | { | |
1651 | struct ucma_file *file = filp->private_data; | |
1652 | struct rdma_ucm_cmd_hdr hdr; | |
1653 | ssize_t ret; | |
1654 | ||
f73a1dbc LR |
1655 | if (!ib_safe_file_access(filp)) { |
1656 | pr_err_once("ucma_write: process %d (%s) changed security contexts after opening file descriptor, this is not allowed.\n", | |
1657 | task_tgid_vnr(current), current->comm); | |
e6bd18f5 | 1658 | return -EACCES; |
f73a1dbc | 1659 | } |
e6bd18f5 | 1660 | |
75216638 SH |
1661 | if (len < sizeof(hdr)) |
1662 | return -EINVAL; | |
1663 | ||
1664 | if (copy_from_user(&hdr, buf, sizeof(hdr))) | |
1665 | return -EFAULT; | |
1666 | ||
caf6e3f2 | 1667 | if (hdr.cmd >= ARRAY_SIZE(ucma_cmd_table)) |
75216638 SH |
1668 | return -EINVAL; |
1669 | ||
1670 | if (hdr.in + sizeof(hdr) > len) | |
1671 | return -EINVAL; | |
1672 | ||
1673 | if (!ucma_cmd_table[hdr.cmd]) | |
1674 | return -ENOSYS; | |
1675 | ||
1676 | ret = ucma_cmd_table[hdr.cmd](file, buf + sizeof(hdr), hdr.in, hdr.out); | |
1677 | if (!ret) | |
1678 | ret = len; | |
1679 | ||
1680 | return ret; | |
1681 | } | |
1682 | ||
afc9a42b | 1683 | static __poll_t ucma_poll(struct file *filp, struct poll_table_struct *wait) |
75216638 SH |
1684 | { |
1685 | struct ucma_file *file = filp->private_data; | |
afc9a42b | 1686 | __poll_t mask = 0; |
75216638 SH |
1687 | |
1688 | poll_wait(filp, &file->poll_wait, wait); | |
1689 | ||
1690 | if (!list_empty(&file->event_list)) | |
a9a08845 | 1691 | mask = EPOLLIN | EPOLLRDNORM; |
75216638 SH |
1692 | |
1693 | return mask; | |
1694 | } | |
1695 | ||
f7a6117e RD |
1696 | /* |
1697 | * ucma_open() does not need the BKL: | |
1698 | * | |
1699 | * - no global state is referred to; | |
1700 | * - there is no ioctl method to race against; | |
1701 | * - no further module initialization is required for open to work | |
1702 | * after the device is registered. | |
1703 | */ | |
75216638 SH |
1704 | static int ucma_open(struct inode *inode, struct file *filp) |
1705 | { | |
1706 | struct ucma_file *file; | |
1707 | ||
1708 | file = kmalloc(sizeof *file, GFP_KERNEL); | |
1709 | if (!file) | |
1710 | return -ENOMEM; | |
1711 | ||
a190d3b0 BS |
1712 | file->close_wq = alloc_ordered_workqueue("ucma_close_id", |
1713 | WQ_MEM_RECLAIM); | |
0174b381 SL |
1714 | if (!file->close_wq) { |
1715 | kfree(file); | |
1716 | return -ENOMEM; | |
1717 | } | |
1718 | ||
75216638 SH |
1719 | INIT_LIST_HEAD(&file->event_list); |
1720 | INIT_LIST_HEAD(&file->ctx_list); | |
1721 | init_waitqueue_head(&file->poll_wait); | |
1722 | mutex_init(&file->mut); | |
1723 | ||
1724 | filp->private_data = file; | |
1725 | file->filp = filp; | |
bc1db9af RD |
1726 | |
1727 | return nonseekable_open(inode, filp); | |
75216638 SH |
1728 | } |
1729 | ||
1730 | static int ucma_close(struct inode *inode, struct file *filp) | |
1731 | { | |
1732 | struct ucma_file *file = filp->private_data; | |
1733 | struct ucma_context *ctx, *tmp; | |
1734 | ||
1735 | mutex_lock(&file->mut); | |
1736 | list_for_each_entry_safe(ctx, tmp, &file->ctx_list, list) { | |
e1c30298 | 1737 | ctx->destroying = 1; |
75216638 SH |
1738 | mutex_unlock(&file->mut); |
1739 | ||
1740 | mutex_lock(&mut); | |
1741 | idr_remove(&ctx_idr, ctx->id); | |
1742 | mutex_unlock(&mut); | |
1743 | ||
e1c30298 YH |
1744 | flush_workqueue(file->close_wq); |
1745 | /* At that step once ctx was marked as destroying and workqueue | |
1746 | * was flushed we are safe from any inflights handlers that | |
1747 | * might put other closing task. | |
1748 | */ | |
1749 | mutex_lock(&mut); | |
1750 | if (!ctx->closing) { | |
1751 | mutex_unlock(&mut); | |
1752 | /* rdma_destroy_id ensures that no event handlers are | |
1753 | * inflight for that id before releasing it. | |
1754 | */ | |
1755 | rdma_destroy_id(ctx->cm_id); | |
1756 | } else { | |
1757 | mutex_unlock(&mut); | |
1758 | } | |
1759 | ||
75216638 SH |
1760 | ucma_free_ctx(ctx); |
1761 | mutex_lock(&file->mut); | |
1762 | } | |
1763 | mutex_unlock(&file->mut); | |
e1c30298 | 1764 | destroy_workqueue(file->close_wq); |
75216638 SH |
1765 | kfree(file); |
1766 | return 0; | |
1767 | } | |
1768 | ||
2b8693c0 | 1769 | static const struct file_operations ucma_fops = { |
75216638 SH |
1770 | .owner = THIS_MODULE, |
1771 | .open = ucma_open, | |
1772 | .release = ucma_close, | |
1773 | .write = ucma_write, | |
1774 | .poll = ucma_poll, | |
bc1db9af | 1775 | .llseek = no_llseek, |
75216638 SH |
1776 | }; |
1777 | ||
1778 | static struct miscdevice ucma_misc = { | |
04ea2f81 RD |
1779 | .minor = MISC_DYNAMIC_MINOR, |
1780 | .name = "rdma_cm", | |
1781 | .nodename = "infiniband/rdma_cm", | |
1782 | .mode = 0666, | |
1783 | .fops = &ucma_fops, | |
75216638 SH |
1784 | }; |
1785 | ||
1786 | static ssize_t show_abi_version(struct device *dev, | |
1787 | struct device_attribute *attr, | |
1788 | char *buf) | |
1789 | { | |
1790 | return sprintf(buf, "%d\n", RDMA_USER_CM_ABI_VERSION); | |
1791 | } | |
1792 | static DEVICE_ATTR(abi_version, S_IRUGO, show_abi_version, NULL); | |
1793 | ||
1794 | static int __init ucma_init(void) | |
1795 | { | |
1796 | int ret; | |
1797 | ||
1798 | ret = misc_register(&ucma_misc); | |
1799 | if (ret) | |
1800 | return ret; | |
1801 | ||
1802 | ret = device_create_file(ucma_misc.this_device, &dev_attr_abi_version); | |
1803 | if (ret) { | |
aba25a3e | 1804 | pr_err("rdma_ucm: couldn't create abi_version attr\n"); |
97cb7e40 SW |
1805 | goto err1; |
1806 | } | |
1807 | ||
ec8f23ce | 1808 | ucma_ctl_table_hdr = register_net_sysctl(&init_net, "net/rdma_ucm", ucma_ctl_table); |
97cb7e40 | 1809 | if (!ucma_ctl_table_hdr) { |
aba25a3e | 1810 | pr_err("rdma_ucm: couldn't register sysctl paths\n"); |
97cb7e40 SW |
1811 | ret = -ENOMEM; |
1812 | goto err2; | |
75216638 SH |
1813 | } |
1814 | return 0; | |
97cb7e40 SW |
1815 | err2: |
1816 | device_remove_file(ucma_misc.this_device, &dev_attr_abi_version); | |
1817 | err1: | |
75216638 SH |
1818 | misc_deregister(&ucma_misc); |
1819 | return ret; | |
1820 | } | |
1821 | ||
1822 | static void __exit ucma_cleanup(void) | |
1823 | { | |
5dd3df10 | 1824 | unregister_net_sysctl_table(ucma_ctl_table_hdr); |
75216638 SH |
1825 | device_remove_file(ucma_misc.this_device, &dev_attr_abi_version); |
1826 | misc_deregister(&ucma_misc); | |
1827 | idr_destroy(&ctx_idr); | |
45d25420 | 1828 | idr_destroy(&multicast_idr); |
75216638 SH |
1829 | } |
1830 | ||
1831 | module_init(ucma_init); | |
1832 | module_exit(ucma_cleanup); |