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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma
[mirror_ubuntu-eoan-kernel.git] / drivers / infiniband / core / ucm.c
1 /*
2 * Copyright (c) 2005 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Intel Corporation. All rights reserved.
4 *
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
14 *
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 * SOFTWARE.
32 */
33
34 #include <linux/completion.h>
35 #include <linux/init.h>
36 #include <linux/fs.h>
37 #include <linux/module.h>
38 #include <linux/device.h>
39 #include <linux/err.h>
40 #include <linux/poll.h>
41 #include <linux/sched.h>
42 #include <linux/file.h>
43 #include <linux/mount.h>
44 #include <linux/cdev.h>
45 #include <linux/xarray.h>
46 #include <linux/mutex.h>
47 #include <linux/slab.h>
48
49 #include <linux/nospec.h>
50
51 #include <linux/uaccess.h>
52
53 #include <rdma/ib.h>
54 #include <rdma/ib_cm.h>
55 #include <rdma/ib_user_cm.h>
56 #include <rdma/ib_marshall.h>
57
58 #include "core_priv.h"
59
60 MODULE_AUTHOR("Libor Michalek");
61 MODULE_DESCRIPTION("InfiniBand userspace Connection Manager access");
62 MODULE_LICENSE("Dual BSD/GPL");
63
64 struct ib_ucm_device {
65 int devnum;
66 struct cdev cdev;
67 struct device dev;
68 struct ib_device *ib_dev;
69 };
70
71 struct ib_ucm_file {
72 struct mutex file_mutex;
73 struct file *filp;
74 struct ib_ucm_device *device;
75
76 struct list_head ctxs;
77 struct list_head events;
78 wait_queue_head_t poll_wait;
79 };
80
81 struct ib_ucm_context {
82 int id;
83 struct completion comp;
84 atomic_t ref;
85 int events_reported;
86
87 struct ib_ucm_file *file;
88 struct ib_cm_id *cm_id;
89 __u64 uid;
90
91 struct list_head events; /* list of pending events. */
92 struct list_head file_list; /* member in file ctx list */
93 };
94
95 struct ib_ucm_event {
96 struct ib_ucm_context *ctx;
97 struct list_head file_list; /* member in file event list */
98 struct list_head ctx_list; /* member in ctx event list */
99
100 struct ib_cm_id *cm_id;
101 struct ib_ucm_event_resp resp;
102 void *data;
103 void *info;
104 int data_len;
105 int info_len;
106 };
107
108 enum {
109 IB_UCM_MAJOR = 231,
110 IB_UCM_BASE_MINOR = 224,
111 IB_UCM_MAX_DEVICES = RDMA_MAX_PORTS,
112 IB_UCM_NUM_FIXED_MINOR = 32,
113 IB_UCM_NUM_DYNAMIC_MINOR = IB_UCM_MAX_DEVICES - IB_UCM_NUM_FIXED_MINOR,
114 };
115
116 #define IB_UCM_BASE_DEV MKDEV(IB_UCM_MAJOR, IB_UCM_BASE_MINOR)
117 static dev_t dynamic_ucm_dev;
118
119 static void ib_ucm_add_one(struct ib_device *device);
120 static void ib_ucm_remove_one(struct ib_device *device, void *client_data);
121
122 static struct ib_client ucm_client = {
123 .name = "ucm",
124 .add = ib_ucm_add_one,
125 .remove = ib_ucm_remove_one
126 };
127
128 static DEFINE_XARRAY_ALLOC(ctx_id_table);
129 static DECLARE_BITMAP(dev_map, IB_UCM_MAX_DEVICES);
130
131 static struct ib_ucm_context *ib_ucm_ctx_get(struct ib_ucm_file *file, int id)
132 {
133 struct ib_ucm_context *ctx;
134
135 xa_lock(&ctx_id_table);
136 ctx = xa_load(&ctx_id_table, id);
137 if (!ctx)
138 ctx = ERR_PTR(-ENOENT);
139 else if (ctx->file != file)
140 ctx = ERR_PTR(-EINVAL);
141 else
142 atomic_inc(&ctx->ref);
143 xa_unlock(&ctx_id_table);
144
145 return ctx;
146 }
147
148 static void ib_ucm_ctx_put(struct ib_ucm_context *ctx)
149 {
150 if (atomic_dec_and_test(&ctx->ref))
151 complete(&ctx->comp);
152 }
153
154 static inline int ib_ucm_new_cm_id(int event)
155 {
156 return event == IB_CM_REQ_RECEIVED || event == IB_CM_SIDR_REQ_RECEIVED;
157 }
158
159 static void ib_ucm_cleanup_events(struct ib_ucm_context *ctx)
160 {
161 struct ib_ucm_event *uevent;
162
163 mutex_lock(&ctx->file->file_mutex);
164 list_del(&ctx->file_list);
165 while (!list_empty(&ctx->events)) {
166
167 uevent = list_entry(ctx->events.next,
168 struct ib_ucm_event, ctx_list);
169 list_del(&uevent->file_list);
170 list_del(&uevent->ctx_list);
171 mutex_unlock(&ctx->file->file_mutex);
172
173 /* clear incoming connections. */
174 if (ib_ucm_new_cm_id(uevent->resp.event))
175 ib_destroy_cm_id(uevent->cm_id);
176
177 kfree(uevent);
178 mutex_lock(&ctx->file->file_mutex);
179 }
180 mutex_unlock(&ctx->file->file_mutex);
181 }
182
183 static struct ib_ucm_context *ib_ucm_ctx_alloc(struct ib_ucm_file *file)
184 {
185 struct ib_ucm_context *ctx;
186
187 ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
188 if (!ctx)
189 return NULL;
190
191 atomic_set(&ctx->ref, 1);
192 init_completion(&ctx->comp);
193 ctx->file = file;
194 INIT_LIST_HEAD(&ctx->events);
195
196 if (xa_alloc(&ctx_id_table, &ctx->id, ctx, xa_limit_32b, GFP_KERNEL))
197 goto error;
198
199 list_add_tail(&ctx->file_list, &file->ctxs);
200 return ctx;
201
202 error:
203 kfree(ctx);
204 return NULL;
205 }
206
207 static void ib_ucm_event_req_get(struct ib_ucm_req_event_resp *ureq,
208 const struct ib_cm_req_event_param *kreq)
209 {
210 ureq->remote_ca_guid = kreq->remote_ca_guid;
211 ureq->remote_qkey = kreq->remote_qkey;
212 ureq->remote_qpn = kreq->remote_qpn;
213 ureq->qp_type = kreq->qp_type;
214 ureq->starting_psn = kreq->starting_psn;
215 ureq->responder_resources = kreq->responder_resources;
216 ureq->initiator_depth = kreq->initiator_depth;
217 ureq->local_cm_response_timeout = kreq->local_cm_response_timeout;
218 ureq->flow_control = kreq->flow_control;
219 ureq->remote_cm_response_timeout = kreq->remote_cm_response_timeout;
220 ureq->retry_count = kreq->retry_count;
221 ureq->rnr_retry_count = kreq->rnr_retry_count;
222 ureq->srq = kreq->srq;
223 ureq->port = kreq->port;
224
225 ib_copy_path_rec_to_user(&ureq->primary_path, kreq->primary_path);
226 if (kreq->alternate_path)
227 ib_copy_path_rec_to_user(&ureq->alternate_path,
228 kreq->alternate_path);
229 }
230
231 static void ib_ucm_event_rep_get(struct ib_ucm_rep_event_resp *urep,
232 const struct ib_cm_rep_event_param *krep)
233 {
234 urep->remote_ca_guid = krep->remote_ca_guid;
235 urep->remote_qkey = krep->remote_qkey;
236 urep->remote_qpn = krep->remote_qpn;
237 urep->starting_psn = krep->starting_psn;
238 urep->responder_resources = krep->responder_resources;
239 urep->initiator_depth = krep->initiator_depth;
240 urep->target_ack_delay = krep->target_ack_delay;
241 urep->failover_accepted = krep->failover_accepted;
242 urep->flow_control = krep->flow_control;
243 urep->rnr_retry_count = krep->rnr_retry_count;
244 urep->srq = krep->srq;
245 }
246
247 static void ib_ucm_event_sidr_rep_get(struct ib_ucm_sidr_rep_event_resp *urep,
248 const struct ib_cm_sidr_rep_event_param *krep)
249 {
250 urep->status = krep->status;
251 urep->qkey = krep->qkey;
252 urep->qpn = krep->qpn;
253 };
254
255 static int ib_ucm_event_process(const struct ib_cm_event *evt,
256 struct ib_ucm_event *uvt)
257 {
258 void *info = NULL;
259
260 switch (evt->event) {
261 case IB_CM_REQ_RECEIVED:
262 ib_ucm_event_req_get(&uvt->resp.u.req_resp,
263 &evt->param.req_rcvd);
264 uvt->data_len = IB_CM_REQ_PRIVATE_DATA_SIZE;
265 uvt->resp.present = IB_UCM_PRES_PRIMARY;
266 uvt->resp.present |= (evt->param.req_rcvd.alternate_path ?
267 IB_UCM_PRES_ALTERNATE : 0);
268 break;
269 case IB_CM_REP_RECEIVED:
270 ib_ucm_event_rep_get(&uvt->resp.u.rep_resp,
271 &evt->param.rep_rcvd);
272 uvt->data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
273 break;
274 case IB_CM_RTU_RECEIVED:
275 uvt->data_len = IB_CM_RTU_PRIVATE_DATA_SIZE;
276 uvt->resp.u.send_status = evt->param.send_status;
277 break;
278 case IB_CM_DREQ_RECEIVED:
279 uvt->data_len = IB_CM_DREQ_PRIVATE_DATA_SIZE;
280 uvt->resp.u.send_status = evt->param.send_status;
281 break;
282 case IB_CM_DREP_RECEIVED:
283 uvt->data_len = IB_CM_DREP_PRIVATE_DATA_SIZE;
284 uvt->resp.u.send_status = evt->param.send_status;
285 break;
286 case IB_CM_MRA_RECEIVED:
287 uvt->resp.u.mra_resp.timeout =
288 evt->param.mra_rcvd.service_timeout;
289 uvt->data_len = IB_CM_MRA_PRIVATE_DATA_SIZE;
290 break;
291 case IB_CM_REJ_RECEIVED:
292 uvt->resp.u.rej_resp.reason = evt->param.rej_rcvd.reason;
293 uvt->data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
294 uvt->info_len = evt->param.rej_rcvd.ari_length;
295 info = evt->param.rej_rcvd.ari;
296 break;
297 case IB_CM_LAP_RECEIVED:
298 ib_copy_path_rec_to_user(&uvt->resp.u.lap_resp.path,
299 evt->param.lap_rcvd.alternate_path);
300 uvt->data_len = IB_CM_LAP_PRIVATE_DATA_SIZE;
301 uvt->resp.present = IB_UCM_PRES_ALTERNATE;
302 break;
303 case IB_CM_APR_RECEIVED:
304 uvt->resp.u.apr_resp.status = evt->param.apr_rcvd.ap_status;
305 uvt->data_len = IB_CM_APR_PRIVATE_DATA_SIZE;
306 uvt->info_len = evt->param.apr_rcvd.info_len;
307 info = evt->param.apr_rcvd.apr_info;
308 break;
309 case IB_CM_SIDR_REQ_RECEIVED:
310 uvt->resp.u.sidr_req_resp.pkey =
311 evt->param.sidr_req_rcvd.pkey;
312 uvt->resp.u.sidr_req_resp.port =
313 evt->param.sidr_req_rcvd.port;
314 uvt->data_len = IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE;
315 break;
316 case IB_CM_SIDR_REP_RECEIVED:
317 ib_ucm_event_sidr_rep_get(&uvt->resp.u.sidr_rep_resp,
318 &evt->param.sidr_rep_rcvd);
319 uvt->data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
320 uvt->info_len = evt->param.sidr_rep_rcvd.info_len;
321 info = evt->param.sidr_rep_rcvd.info;
322 break;
323 default:
324 uvt->resp.u.send_status = evt->param.send_status;
325 break;
326 }
327
328 if (uvt->data_len) {
329 uvt->data = kmemdup(evt->private_data, uvt->data_len, GFP_KERNEL);
330 if (!uvt->data)
331 goto err1;
332
333 uvt->resp.present |= IB_UCM_PRES_DATA;
334 }
335
336 if (uvt->info_len) {
337 uvt->info = kmemdup(info, uvt->info_len, GFP_KERNEL);
338 if (!uvt->info)
339 goto err2;
340
341 uvt->resp.present |= IB_UCM_PRES_INFO;
342 }
343 return 0;
344
345 err2:
346 kfree(uvt->data);
347 err1:
348 return -ENOMEM;
349 }
350
351 static int ib_ucm_event_handler(struct ib_cm_id *cm_id,
352 const struct ib_cm_event *event)
353 {
354 struct ib_ucm_event *uevent;
355 struct ib_ucm_context *ctx;
356 int result = 0;
357
358 ctx = cm_id->context;
359
360 uevent = kzalloc(sizeof *uevent, GFP_KERNEL);
361 if (!uevent)
362 goto err1;
363
364 uevent->ctx = ctx;
365 uevent->cm_id = cm_id;
366 uevent->resp.uid = ctx->uid;
367 uevent->resp.id = ctx->id;
368 uevent->resp.event = event->event;
369
370 result = ib_ucm_event_process(event, uevent);
371 if (result)
372 goto err2;
373
374 mutex_lock(&ctx->file->file_mutex);
375 list_add_tail(&uevent->file_list, &ctx->file->events);
376 list_add_tail(&uevent->ctx_list, &ctx->events);
377 wake_up_interruptible(&ctx->file->poll_wait);
378 mutex_unlock(&ctx->file->file_mutex);
379 return 0;
380
381 err2:
382 kfree(uevent);
383 err1:
384 /* Destroy new cm_id's */
385 return ib_ucm_new_cm_id(event->event);
386 }
387
388 static ssize_t ib_ucm_event(struct ib_ucm_file *file,
389 const char __user *inbuf,
390 int in_len, int out_len)
391 {
392 struct ib_ucm_context *ctx;
393 struct ib_ucm_event_get cmd;
394 struct ib_ucm_event *uevent;
395 int result = 0;
396
397 if (out_len < sizeof(struct ib_ucm_event_resp))
398 return -ENOSPC;
399
400 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
401 return -EFAULT;
402
403 mutex_lock(&file->file_mutex);
404 while (list_empty(&file->events)) {
405 mutex_unlock(&file->file_mutex);
406
407 if (file->filp->f_flags & O_NONBLOCK)
408 return -EAGAIN;
409
410 if (wait_event_interruptible(file->poll_wait,
411 !list_empty(&file->events)))
412 return -ERESTARTSYS;
413
414 mutex_lock(&file->file_mutex);
415 }
416
417 uevent = list_entry(file->events.next, struct ib_ucm_event, file_list);
418
419 if (ib_ucm_new_cm_id(uevent->resp.event)) {
420 ctx = ib_ucm_ctx_alloc(file);
421 if (!ctx) {
422 result = -ENOMEM;
423 goto done;
424 }
425
426 ctx->cm_id = uevent->cm_id;
427 ctx->cm_id->context = ctx;
428 uevent->resp.id = ctx->id;
429 }
430
431 if (copy_to_user(u64_to_user_ptr(cmd.response),
432 &uevent->resp, sizeof(uevent->resp))) {
433 result = -EFAULT;
434 goto done;
435 }
436
437 if (uevent->data) {
438 if (cmd.data_len < uevent->data_len) {
439 result = -ENOMEM;
440 goto done;
441 }
442 if (copy_to_user(u64_to_user_ptr(cmd.data),
443 uevent->data, uevent->data_len)) {
444 result = -EFAULT;
445 goto done;
446 }
447 }
448
449 if (uevent->info) {
450 if (cmd.info_len < uevent->info_len) {
451 result = -ENOMEM;
452 goto done;
453 }
454 if (copy_to_user(u64_to_user_ptr(cmd.info),
455 uevent->info, uevent->info_len)) {
456 result = -EFAULT;
457 goto done;
458 }
459 }
460
461 list_del(&uevent->file_list);
462 list_del(&uevent->ctx_list);
463 uevent->ctx->events_reported++;
464
465 kfree(uevent->data);
466 kfree(uevent->info);
467 kfree(uevent);
468 done:
469 mutex_unlock(&file->file_mutex);
470 return result;
471 }
472
473 static ssize_t ib_ucm_create_id(struct ib_ucm_file *file,
474 const char __user *inbuf,
475 int in_len, int out_len)
476 {
477 struct ib_ucm_create_id cmd;
478 struct ib_ucm_create_id_resp resp;
479 struct ib_ucm_context *ctx;
480 int result;
481
482 if (out_len < sizeof(resp))
483 return -ENOSPC;
484
485 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
486 return -EFAULT;
487
488 mutex_lock(&file->file_mutex);
489 ctx = ib_ucm_ctx_alloc(file);
490 mutex_unlock(&file->file_mutex);
491 if (!ctx)
492 return -ENOMEM;
493
494 ctx->uid = cmd.uid;
495 ctx->cm_id = ib_create_cm_id(file->device->ib_dev,
496 ib_ucm_event_handler, ctx);
497 if (IS_ERR(ctx->cm_id)) {
498 result = PTR_ERR(ctx->cm_id);
499 goto err1;
500 }
501
502 resp.id = ctx->id;
503 if (copy_to_user(u64_to_user_ptr(cmd.response),
504 &resp, sizeof(resp))) {
505 result = -EFAULT;
506 goto err2;
507 }
508 return 0;
509
510 err2:
511 ib_destroy_cm_id(ctx->cm_id);
512 err1:
513 xa_erase(&ctx_id_table, ctx->id);
514 kfree(ctx);
515 return result;
516 }
517
518 static ssize_t ib_ucm_destroy_id(struct ib_ucm_file *file,
519 const char __user *inbuf,
520 int in_len, int out_len)
521 {
522 struct ib_ucm_destroy_id cmd;
523 struct ib_ucm_destroy_id_resp resp;
524 struct ib_ucm_context *ctx;
525 int result = 0;
526
527 if (out_len < sizeof(resp))
528 return -ENOSPC;
529
530 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
531 return -EFAULT;
532
533 xa_lock(&ctx_id_table);
534 ctx = xa_load(&ctx_id_table, cmd.id);
535 if (!ctx)
536 ctx = ERR_PTR(-ENOENT);
537 else if (ctx->file != file)
538 ctx = ERR_PTR(-EINVAL);
539 else
540 __xa_erase(&ctx_id_table, ctx->id);
541 xa_unlock(&ctx_id_table);
542
543 if (IS_ERR(ctx))
544 return PTR_ERR(ctx);
545
546 ib_ucm_ctx_put(ctx);
547 wait_for_completion(&ctx->comp);
548
549 /* No new events will be generated after destroying the cm_id. */
550 ib_destroy_cm_id(ctx->cm_id);
551 /* Cleanup events not yet reported to the user. */
552 ib_ucm_cleanup_events(ctx);
553
554 resp.events_reported = ctx->events_reported;
555 if (copy_to_user(u64_to_user_ptr(cmd.response),
556 &resp, sizeof(resp)))
557 result = -EFAULT;
558
559 kfree(ctx);
560 return result;
561 }
562
563 static ssize_t ib_ucm_attr_id(struct ib_ucm_file *file,
564 const char __user *inbuf,
565 int in_len, int out_len)
566 {
567 struct ib_ucm_attr_id_resp resp;
568 struct ib_ucm_attr_id cmd;
569 struct ib_ucm_context *ctx;
570 int result = 0;
571
572 if (out_len < sizeof(resp))
573 return -ENOSPC;
574
575 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
576 return -EFAULT;
577
578 ctx = ib_ucm_ctx_get(file, cmd.id);
579 if (IS_ERR(ctx))
580 return PTR_ERR(ctx);
581
582 resp.service_id = ctx->cm_id->service_id;
583 resp.service_mask = ctx->cm_id->service_mask;
584 resp.local_id = ctx->cm_id->local_id;
585 resp.remote_id = ctx->cm_id->remote_id;
586
587 if (copy_to_user(u64_to_user_ptr(cmd.response),
588 &resp, sizeof(resp)))
589 result = -EFAULT;
590
591 ib_ucm_ctx_put(ctx);
592 return result;
593 }
594
595 static ssize_t ib_ucm_init_qp_attr(struct ib_ucm_file *file,
596 const char __user *inbuf,
597 int in_len, int out_len)
598 {
599 struct ib_uverbs_qp_attr resp;
600 struct ib_ucm_init_qp_attr cmd;
601 struct ib_ucm_context *ctx;
602 struct ib_qp_attr qp_attr;
603 int result = 0;
604
605 if (out_len < sizeof(resp))
606 return -ENOSPC;
607
608 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
609 return -EFAULT;
610
611 ctx = ib_ucm_ctx_get(file, cmd.id);
612 if (IS_ERR(ctx))
613 return PTR_ERR(ctx);
614
615 resp.qp_attr_mask = 0;
616 memset(&qp_attr, 0, sizeof qp_attr);
617 qp_attr.qp_state = cmd.qp_state;
618 result = ib_cm_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask);
619 if (result)
620 goto out;
621
622 ib_copy_qp_attr_to_user(ctx->cm_id->device, &resp, &qp_attr);
623
624 if (copy_to_user(u64_to_user_ptr(cmd.response),
625 &resp, sizeof(resp)))
626 result = -EFAULT;
627
628 out:
629 ib_ucm_ctx_put(ctx);
630 return result;
631 }
632
633 static int ucm_validate_listen(__be64 service_id, __be64 service_mask)
634 {
635 service_id &= service_mask;
636
637 if (((service_id & IB_CMA_SERVICE_ID_MASK) == IB_CMA_SERVICE_ID) ||
638 ((service_id & IB_SDP_SERVICE_ID_MASK) == IB_SDP_SERVICE_ID))
639 return -EINVAL;
640
641 return 0;
642 }
643
644 static ssize_t ib_ucm_listen(struct ib_ucm_file *file,
645 const char __user *inbuf,
646 int in_len, int out_len)
647 {
648 struct ib_ucm_listen cmd;
649 struct ib_ucm_context *ctx;
650 int result;
651
652 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
653 return -EFAULT;
654
655 ctx = ib_ucm_ctx_get(file, cmd.id);
656 if (IS_ERR(ctx))
657 return PTR_ERR(ctx);
658
659 result = ucm_validate_listen(cmd.service_id, cmd.service_mask);
660 if (result)
661 goto out;
662
663 result = ib_cm_listen(ctx->cm_id, cmd.service_id, cmd.service_mask);
664 out:
665 ib_ucm_ctx_put(ctx);
666 return result;
667 }
668
669 static ssize_t ib_ucm_notify(struct ib_ucm_file *file,
670 const char __user *inbuf,
671 int in_len, int out_len)
672 {
673 struct ib_ucm_notify cmd;
674 struct ib_ucm_context *ctx;
675 int result;
676
677 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
678 return -EFAULT;
679
680 ctx = ib_ucm_ctx_get(file, cmd.id);
681 if (IS_ERR(ctx))
682 return PTR_ERR(ctx);
683
684 result = ib_cm_notify(ctx->cm_id, (enum ib_event_type) cmd.event);
685 ib_ucm_ctx_put(ctx);
686 return result;
687 }
688
689 static int ib_ucm_alloc_data(const void **dest, u64 src, u32 len)
690 {
691 void *data;
692
693 *dest = NULL;
694
695 if (!len)
696 return 0;
697
698 data = memdup_user(u64_to_user_ptr(src), len);
699 if (IS_ERR(data))
700 return PTR_ERR(data);
701
702 *dest = data;
703 return 0;
704 }
705
706 static int ib_ucm_path_get(struct sa_path_rec **path, u64 src)
707 {
708 struct ib_user_path_rec upath;
709 struct sa_path_rec *sa_path;
710
711 *path = NULL;
712
713 if (!src)
714 return 0;
715
716 sa_path = kmalloc(sizeof(*sa_path), GFP_KERNEL);
717 if (!sa_path)
718 return -ENOMEM;
719
720 if (copy_from_user(&upath, u64_to_user_ptr(src),
721 sizeof(upath))) {
722
723 kfree(sa_path);
724 return -EFAULT;
725 }
726
727 ib_copy_path_rec_from_user(sa_path, &upath);
728 *path = sa_path;
729 return 0;
730 }
731
732 static ssize_t ib_ucm_send_req(struct ib_ucm_file *file,
733 const char __user *inbuf,
734 int in_len, int out_len)
735 {
736 struct ib_cm_req_param param;
737 struct ib_ucm_context *ctx;
738 struct ib_ucm_req cmd;
739 int result;
740
741 param.private_data = NULL;
742 param.primary_path = NULL;
743 param.alternate_path = NULL;
744
745 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
746 return -EFAULT;
747
748 result = ib_ucm_alloc_data(&param.private_data, cmd.data, cmd.len);
749 if (result)
750 goto done;
751
752 result = ib_ucm_path_get(&param.primary_path, cmd.primary_path);
753 if (result)
754 goto done;
755
756 result = ib_ucm_path_get(&param.alternate_path, cmd.alternate_path);
757 if (result)
758 goto done;
759
760 param.private_data_len = cmd.len;
761 param.service_id = cmd.sid;
762 param.qp_num = cmd.qpn;
763 param.qp_type = cmd.qp_type;
764 param.starting_psn = cmd.psn;
765 param.peer_to_peer = cmd.peer_to_peer;
766 param.responder_resources = cmd.responder_resources;
767 param.initiator_depth = cmd.initiator_depth;
768 param.remote_cm_response_timeout = cmd.remote_cm_response_timeout;
769 param.flow_control = cmd.flow_control;
770 param.local_cm_response_timeout = cmd.local_cm_response_timeout;
771 param.retry_count = cmd.retry_count;
772 param.rnr_retry_count = cmd.rnr_retry_count;
773 param.max_cm_retries = cmd.max_cm_retries;
774 param.srq = cmd.srq;
775
776 ctx = ib_ucm_ctx_get(file, cmd.id);
777 if (!IS_ERR(ctx)) {
778 result = ib_send_cm_req(ctx->cm_id, &param);
779 ib_ucm_ctx_put(ctx);
780 } else
781 result = PTR_ERR(ctx);
782
783 done:
784 kfree(param.private_data);
785 kfree(param.primary_path);
786 kfree(param.alternate_path);
787 return result;
788 }
789
790 static ssize_t ib_ucm_send_rep(struct ib_ucm_file *file,
791 const char __user *inbuf,
792 int in_len, int out_len)
793 {
794 struct ib_cm_rep_param param;
795 struct ib_ucm_context *ctx;
796 struct ib_ucm_rep cmd;
797 int result;
798
799 param.private_data = NULL;
800
801 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
802 return -EFAULT;
803
804 result = ib_ucm_alloc_data(&param.private_data, cmd.data, cmd.len);
805 if (result)
806 return result;
807
808 param.qp_num = cmd.qpn;
809 param.starting_psn = cmd.psn;
810 param.private_data_len = cmd.len;
811 param.responder_resources = cmd.responder_resources;
812 param.initiator_depth = cmd.initiator_depth;
813 param.failover_accepted = cmd.failover_accepted;
814 param.flow_control = cmd.flow_control;
815 param.rnr_retry_count = cmd.rnr_retry_count;
816 param.srq = cmd.srq;
817
818 ctx = ib_ucm_ctx_get(file, cmd.id);
819 if (!IS_ERR(ctx)) {
820 ctx->uid = cmd.uid;
821 result = ib_send_cm_rep(ctx->cm_id, &param);
822 ib_ucm_ctx_put(ctx);
823 } else
824 result = PTR_ERR(ctx);
825
826 kfree(param.private_data);
827 return result;
828 }
829
830 static ssize_t ib_ucm_send_private_data(struct ib_ucm_file *file,
831 const char __user *inbuf, int in_len,
832 int (*func)(struct ib_cm_id *cm_id,
833 const void *private_data,
834 u8 private_data_len))
835 {
836 struct ib_ucm_private_data cmd;
837 struct ib_ucm_context *ctx;
838 const void *private_data = NULL;
839 int result;
840
841 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
842 return -EFAULT;
843
844 result = ib_ucm_alloc_data(&private_data, cmd.data, cmd.len);
845 if (result)
846 return result;
847
848 ctx = ib_ucm_ctx_get(file, cmd.id);
849 if (!IS_ERR(ctx)) {
850 result = func(ctx->cm_id, private_data, cmd.len);
851 ib_ucm_ctx_put(ctx);
852 } else
853 result = PTR_ERR(ctx);
854
855 kfree(private_data);
856 return result;
857 }
858
859 static ssize_t ib_ucm_send_rtu(struct ib_ucm_file *file,
860 const char __user *inbuf,
861 int in_len, int out_len)
862 {
863 return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_rtu);
864 }
865
866 static ssize_t ib_ucm_send_dreq(struct ib_ucm_file *file,
867 const char __user *inbuf,
868 int in_len, int out_len)
869 {
870 return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_dreq);
871 }
872
873 static ssize_t ib_ucm_send_drep(struct ib_ucm_file *file,
874 const char __user *inbuf,
875 int in_len, int out_len)
876 {
877 return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_drep);
878 }
879
880 static ssize_t ib_ucm_send_info(struct ib_ucm_file *file,
881 const char __user *inbuf, int in_len,
882 int (*func)(struct ib_cm_id *cm_id,
883 int status,
884 const void *info,
885 u8 info_len,
886 const void *data,
887 u8 data_len))
888 {
889 struct ib_ucm_context *ctx;
890 struct ib_ucm_info cmd;
891 const void *data = NULL;
892 const void *info = NULL;
893 int result;
894
895 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
896 return -EFAULT;
897
898 result = ib_ucm_alloc_data(&data, cmd.data, cmd.data_len);
899 if (result)
900 goto done;
901
902 result = ib_ucm_alloc_data(&info, cmd.info, cmd.info_len);
903 if (result)
904 goto done;
905
906 ctx = ib_ucm_ctx_get(file, cmd.id);
907 if (!IS_ERR(ctx)) {
908 result = func(ctx->cm_id, cmd.status, info, cmd.info_len,
909 data, cmd.data_len);
910 ib_ucm_ctx_put(ctx);
911 } else
912 result = PTR_ERR(ctx);
913
914 done:
915 kfree(data);
916 kfree(info);
917 return result;
918 }
919
920 static ssize_t ib_ucm_send_rej(struct ib_ucm_file *file,
921 const char __user *inbuf,
922 int in_len, int out_len)
923 {
924 return ib_ucm_send_info(file, inbuf, in_len, (void *)ib_send_cm_rej);
925 }
926
927 static ssize_t ib_ucm_send_apr(struct ib_ucm_file *file,
928 const char __user *inbuf,
929 int in_len, int out_len)
930 {
931 return ib_ucm_send_info(file, inbuf, in_len, (void *)ib_send_cm_apr);
932 }
933
934 static ssize_t ib_ucm_send_mra(struct ib_ucm_file *file,
935 const char __user *inbuf,
936 int in_len, int out_len)
937 {
938 struct ib_ucm_context *ctx;
939 struct ib_ucm_mra cmd;
940 const void *data = NULL;
941 int result;
942
943 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
944 return -EFAULT;
945
946 result = ib_ucm_alloc_data(&data, cmd.data, cmd.len);
947 if (result)
948 return result;
949
950 ctx = ib_ucm_ctx_get(file, cmd.id);
951 if (!IS_ERR(ctx)) {
952 result = ib_send_cm_mra(ctx->cm_id, cmd.timeout, data, cmd.len);
953 ib_ucm_ctx_put(ctx);
954 } else
955 result = PTR_ERR(ctx);
956
957 kfree(data);
958 return result;
959 }
960
961 static ssize_t ib_ucm_send_lap(struct ib_ucm_file *file,
962 const char __user *inbuf,
963 int in_len, int out_len)
964 {
965 struct ib_ucm_context *ctx;
966 struct sa_path_rec *path = NULL;
967 struct ib_ucm_lap cmd;
968 const void *data = NULL;
969 int result;
970
971 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
972 return -EFAULT;
973
974 result = ib_ucm_alloc_data(&data, cmd.data, cmd.len);
975 if (result)
976 goto done;
977
978 result = ib_ucm_path_get(&path, cmd.path);
979 if (result)
980 goto done;
981
982 ctx = ib_ucm_ctx_get(file, cmd.id);
983 if (!IS_ERR(ctx)) {
984 result = ib_send_cm_lap(ctx->cm_id, path, data, cmd.len);
985 ib_ucm_ctx_put(ctx);
986 } else
987 result = PTR_ERR(ctx);
988
989 done:
990 kfree(data);
991 kfree(path);
992 return result;
993 }
994
995 static ssize_t ib_ucm_send_sidr_req(struct ib_ucm_file *file,
996 const char __user *inbuf,
997 int in_len, int out_len)
998 {
999 struct ib_cm_sidr_req_param param = {};
1000 struct ib_ucm_context *ctx;
1001 struct ib_ucm_sidr_req cmd;
1002 int result;
1003
1004 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
1005 return -EFAULT;
1006
1007 result = ib_ucm_alloc_data(&param.private_data, cmd.data, cmd.len);
1008 if (result)
1009 goto done;
1010
1011 result = ib_ucm_path_get(&param.path, cmd.path);
1012 if (result)
1013 goto done;
1014
1015 param.private_data_len = cmd.len;
1016 param.service_id = cmd.sid;
1017 param.timeout_ms = cmd.timeout;
1018 param.max_cm_retries = cmd.max_cm_retries;
1019
1020 ctx = ib_ucm_ctx_get(file, cmd.id);
1021 if (!IS_ERR(ctx)) {
1022 result = ib_send_cm_sidr_req(ctx->cm_id, &param);
1023 ib_ucm_ctx_put(ctx);
1024 } else
1025 result = PTR_ERR(ctx);
1026
1027 done:
1028 kfree(param.private_data);
1029 kfree(param.path);
1030 return result;
1031 }
1032
1033 static ssize_t ib_ucm_send_sidr_rep(struct ib_ucm_file *file,
1034 const char __user *inbuf,
1035 int in_len, int out_len)
1036 {
1037 struct ib_cm_sidr_rep_param param;
1038 struct ib_ucm_sidr_rep cmd;
1039 struct ib_ucm_context *ctx;
1040 int result;
1041
1042 param.info = NULL;
1043
1044 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
1045 return -EFAULT;
1046
1047 result = ib_ucm_alloc_data(&param.private_data,
1048 cmd.data, cmd.data_len);
1049 if (result)
1050 goto done;
1051
1052 result = ib_ucm_alloc_data(&param.info, cmd.info, cmd.info_len);
1053 if (result)
1054 goto done;
1055
1056 param.qp_num = cmd.qpn;
1057 param.qkey = cmd.qkey;
1058 param.status = cmd.status;
1059 param.info_length = cmd.info_len;
1060 param.private_data_len = cmd.data_len;
1061
1062 ctx = ib_ucm_ctx_get(file, cmd.id);
1063 if (!IS_ERR(ctx)) {
1064 result = ib_send_cm_sidr_rep(ctx->cm_id, &param);
1065 ib_ucm_ctx_put(ctx);
1066 } else
1067 result = PTR_ERR(ctx);
1068
1069 done:
1070 kfree(param.private_data);
1071 kfree(param.info);
1072 return result;
1073 }
1074
1075 static ssize_t (*ucm_cmd_table[])(struct ib_ucm_file *file,
1076 const char __user *inbuf,
1077 int in_len, int out_len) = {
1078 [IB_USER_CM_CMD_CREATE_ID] = ib_ucm_create_id,
1079 [IB_USER_CM_CMD_DESTROY_ID] = ib_ucm_destroy_id,
1080 [IB_USER_CM_CMD_ATTR_ID] = ib_ucm_attr_id,
1081 [IB_USER_CM_CMD_LISTEN] = ib_ucm_listen,
1082 [IB_USER_CM_CMD_NOTIFY] = ib_ucm_notify,
1083 [IB_USER_CM_CMD_SEND_REQ] = ib_ucm_send_req,
1084 [IB_USER_CM_CMD_SEND_REP] = ib_ucm_send_rep,
1085 [IB_USER_CM_CMD_SEND_RTU] = ib_ucm_send_rtu,
1086 [IB_USER_CM_CMD_SEND_DREQ] = ib_ucm_send_dreq,
1087 [IB_USER_CM_CMD_SEND_DREP] = ib_ucm_send_drep,
1088 [IB_USER_CM_CMD_SEND_REJ] = ib_ucm_send_rej,
1089 [IB_USER_CM_CMD_SEND_MRA] = ib_ucm_send_mra,
1090 [IB_USER_CM_CMD_SEND_LAP] = ib_ucm_send_lap,
1091 [IB_USER_CM_CMD_SEND_APR] = ib_ucm_send_apr,
1092 [IB_USER_CM_CMD_SEND_SIDR_REQ] = ib_ucm_send_sidr_req,
1093 [IB_USER_CM_CMD_SEND_SIDR_REP] = ib_ucm_send_sidr_rep,
1094 [IB_USER_CM_CMD_EVENT] = ib_ucm_event,
1095 [IB_USER_CM_CMD_INIT_QP_ATTR] = ib_ucm_init_qp_attr,
1096 };
1097
1098 static ssize_t ib_ucm_write(struct file *filp, const char __user *buf,
1099 size_t len, loff_t *pos)
1100 {
1101 struct ib_ucm_file *file = filp->private_data;
1102 struct ib_ucm_cmd_hdr hdr;
1103 ssize_t result;
1104
1105 if (!ib_safe_file_access(filp)) {
1106 pr_err_once("ucm_write: process %d (%s) changed security contexts after opening file descriptor, this is not allowed.\n",
1107 task_tgid_vnr(current), current->comm);
1108 return -EACCES;
1109 }
1110
1111 if (len < sizeof(hdr))
1112 return -EINVAL;
1113
1114 if (copy_from_user(&hdr, buf, sizeof(hdr)))
1115 return -EFAULT;
1116
1117 if (hdr.cmd >= ARRAY_SIZE(ucm_cmd_table))
1118 return -EINVAL;
1119 hdr.cmd = array_index_nospec(hdr.cmd, ARRAY_SIZE(ucm_cmd_table));
1120
1121 if (hdr.in + sizeof(hdr) > len)
1122 return -EINVAL;
1123
1124 result = ucm_cmd_table[hdr.cmd](file, buf + sizeof(hdr),
1125 hdr.in, hdr.out);
1126 if (!result)
1127 result = len;
1128
1129 return result;
1130 }
1131
1132 static __poll_t ib_ucm_poll(struct file *filp,
1133 struct poll_table_struct *wait)
1134 {
1135 struct ib_ucm_file *file = filp->private_data;
1136 __poll_t mask = 0;
1137
1138 poll_wait(filp, &file->poll_wait, wait);
1139
1140 if (!list_empty(&file->events))
1141 mask = EPOLLIN | EPOLLRDNORM;
1142
1143 return mask;
1144 }
1145
1146 /*
1147 * ib_ucm_open() does not need the BKL:
1148 *
1149 * - no global state is referred to;
1150 * - there is no ioctl method to race against;
1151 * - no further module initialization is required for open to work
1152 * after the device is registered.
1153 */
1154 static int ib_ucm_open(struct inode *inode, struct file *filp)
1155 {
1156 struct ib_ucm_file *file;
1157
1158 file = kmalloc(sizeof(*file), GFP_KERNEL);
1159 if (!file)
1160 return -ENOMEM;
1161
1162 INIT_LIST_HEAD(&file->events);
1163 INIT_LIST_HEAD(&file->ctxs);
1164 init_waitqueue_head(&file->poll_wait);
1165
1166 mutex_init(&file->file_mutex);
1167
1168 filp->private_data = file;
1169 file->filp = filp;
1170 file->device = container_of(inode->i_cdev, struct ib_ucm_device, cdev);
1171
1172 return stream_open(inode, filp);
1173 }
1174
1175 static int ib_ucm_close(struct inode *inode, struct file *filp)
1176 {
1177 struct ib_ucm_file *file = filp->private_data;
1178 struct ib_ucm_context *ctx;
1179
1180 mutex_lock(&file->file_mutex);
1181 while (!list_empty(&file->ctxs)) {
1182 ctx = list_entry(file->ctxs.next,
1183 struct ib_ucm_context, file_list);
1184 mutex_unlock(&file->file_mutex);
1185
1186 xa_erase(&ctx_id_table, ctx->id);
1187 ib_destroy_cm_id(ctx->cm_id);
1188 ib_ucm_cleanup_events(ctx);
1189 kfree(ctx);
1190
1191 mutex_lock(&file->file_mutex);
1192 }
1193 mutex_unlock(&file->file_mutex);
1194 kfree(file);
1195 return 0;
1196 }
1197
1198 static void ib_ucm_release_dev(struct device *dev)
1199 {
1200 struct ib_ucm_device *ucm_dev;
1201
1202 ucm_dev = container_of(dev, struct ib_ucm_device, dev);
1203 kfree(ucm_dev);
1204 }
1205
1206 static void ib_ucm_free_dev(struct ib_ucm_device *ucm_dev)
1207 {
1208 clear_bit(ucm_dev->devnum, dev_map);
1209 }
1210
1211 static const struct file_operations ucm_fops = {
1212 .owner = THIS_MODULE,
1213 .open = ib_ucm_open,
1214 .release = ib_ucm_close,
1215 .write = ib_ucm_write,
1216 .poll = ib_ucm_poll,
1217 .llseek = no_llseek,
1218 };
1219
1220 static ssize_t show_ibdev(struct device *dev, struct device_attribute *attr,
1221 char *buf)
1222 {
1223 struct ib_ucm_device *ucm_dev;
1224
1225 ucm_dev = container_of(dev, struct ib_ucm_device, dev);
1226 return sprintf(buf, "%s\n", ucm_dev->ib_dev->name);
1227 }
1228 static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL);
1229
1230 static void ib_ucm_add_one(struct ib_device *device)
1231 {
1232 int devnum;
1233 dev_t base;
1234 struct ib_ucm_device *ucm_dev;
1235
1236 if (!device->ops.alloc_ucontext || !rdma_cap_ib_cm(device, 1))
1237 return;
1238
1239 ucm_dev = kzalloc(sizeof *ucm_dev, GFP_KERNEL);
1240 if (!ucm_dev)
1241 return;
1242
1243 device_initialize(&ucm_dev->dev);
1244 ucm_dev->ib_dev = device;
1245 ucm_dev->dev.release = ib_ucm_release_dev;
1246
1247 devnum = find_first_zero_bit(dev_map, IB_UCM_MAX_DEVICES);
1248 if (devnum >= IB_UCM_MAX_DEVICES)
1249 goto err;
1250 ucm_dev->devnum = devnum;
1251 set_bit(devnum, dev_map);
1252 if (devnum >= IB_UCM_NUM_FIXED_MINOR)
1253 base = dynamic_ucm_dev + devnum - IB_UCM_NUM_FIXED_MINOR;
1254 else
1255 base = IB_UCM_BASE_DEV + devnum;
1256
1257 cdev_init(&ucm_dev->cdev, &ucm_fops);
1258 ucm_dev->cdev.owner = THIS_MODULE;
1259 kobject_set_name(&ucm_dev->cdev.kobj, "ucm%d", ucm_dev->devnum);
1260
1261 ucm_dev->dev.class = &cm_class;
1262 ucm_dev->dev.parent = device->dev.parent;
1263 ucm_dev->dev.devt = base;
1264
1265 dev_set_name(&ucm_dev->dev, "ucm%d", ucm_dev->devnum);
1266 if (cdev_device_add(&ucm_dev->cdev, &ucm_dev->dev))
1267 goto err_devnum;
1268
1269 if (device_create_file(&ucm_dev->dev, &dev_attr_ibdev))
1270 goto err_dev;
1271
1272 ib_set_client_data(device, &ucm_client, ucm_dev);
1273 return;
1274
1275 err_dev:
1276 cdev_device_del(&ucm_dev->cdev, &ucm_dev->dev);
1277 err_devnum:
1278 ib_ucm_free_dev(ucm_dev);
1279 err:
1280 put_device(&ucm_dev->dev);
1281 return;
1282 }
1283
1284 static void ib_ucm_remove_one(struct ib_device *device, void *client_data)
1285 {
1286 struct ib_ucm_device *ucm_dev = client_data;
1287
1288 if (!ucm_dev)
1289 return;
1290
1291 cdev_device_del(&ucm_dev->cdev, &ucm_dev->dev);
1292 ib_ucm_free_dev(ucm_dev);
1293 put_device(&ucm_dev->dev);
1294 }
1295
1296 static CLASS_ATTR_STRING(abi_version, S_IRUGO,
1297 __stringify(IB_USER_CM_ABI_VERSION));
1298
1299 static int __init ib_ucm_init(void)
1300 {
1301 int ret;
1302
1303 ret = register_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_NUM_FIXED_MINOR,
1304 "infiniband_cm");
1305 if (ret) {
1306 pr_err("ucm: couldn't register device number\n");
1307 goto error1;
1308 }
1309
1310 ret = alloc_chrdev_region(&dynamic_ucm_dev, 0, IB_UCM_NUM_DYNAMIC_MINOR,
1311 "infiniband_cm");
1312 if (ret) {
1313 pr_err("ucm: couldn't register dynamic device number\n");
1314 goto err_alloc;
1315 }
1316
1317 ret = class_create_file(&cm_class, &class_attr_abi_version.attr);
1318 if (ret) {
1319 pr_err("ucm: couldn't create abi_version attribute\n");
1320 goto error2;
1321 }
1322
1323 ret = ib_register_client(&ucm_client);
1324 if (ret) {
1325 pr_err("ucm: couldn't register client\n");
1326 goto error3;
1327 }
1328 return 0;
1329
1330 error3:
1331 class_remove_file(&cm_class, &class_attr_abi_version.attr);
1332 error2:
1333 unregister_chrdev_region(dynamic_ucm_dev, IB_UCM_NUM_DYNAMIC_MINOR);
1334 err_alloc:
1335 unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_NUM_FIXED_MINOR);
1336 error1:
1337 return ret;
1338 }
1339
1340 static void __exit ib_ucm_cleanup(void)
1341 {
1342 ib_unregister_client(&ucm_client);
1343 class_remove_file(&cm_class, &class_attr_abi_version.attr);
1344 unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_NUM_FIXED_MINOR);
1345 unregister_chrdev_region(dynamic_ucm_dev, IB_UCM_NUM_DYNAMIC_MINOR);
1346 WARN_ON(!xa_empty(&ctx_id_table));
1347 }
1348
1349 module_init(ib_ucm_init);
1350 module_exit(ib_ucm_cleanup);
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