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IB/ucm: Fix deadlock in cleanup
[deliverable/linux.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 * $Id: ucm.c 4311 2005-12-05 18:42:01Z sean.hefty $
34 */
35
36 #include <linux/completion.h>
37 #include <linux/init.h>
38 #include <linux/fs.h>
39 #include <linux/module.h>
40 #include <linux/device.h>
41 #include <linux/err.h>
42 #include <linux/poll.h>
43 #include <linux/file.h>
44 #include <linux/mount.h>
45 #include <linux/cdev.h>
46 #include <linux/idr.h>
47 #include <linux/mutex.h>
48
49 #include <asm/uaccess.h>
50
51 #include <rdma/ib_cm.h>
52 #include <rdma/ib_user_cm.h>
53 #include <rdma/ib_marshall.h>
54
55 MODULE_AUTHOR("Libor Michalek");
56 MODULE_DESCRIPTION("InfiniBand userspace Connection Manager access");
57 MODULE_LICENSE("Dual BSD/GPL");
58
59 struct ib_ucm_device {
60 int devnum;
61 struct cdev dev;
62 struct class_device class_dev;
63 struct ib_device *ib_dev;
64 };
65
66 struct ib_ucm_file {
67 struct mutex file_mutex;
68 struct file *filp;
69 struct ib_ucm_device *device;
70
71 struct list_head ctxs;
72 struct list_head events;
73 wait_queue_head_t poll_wait;
74 };
75
76 struct ib_ucm_context {
77 int id;
78 struct completion comp;
79 atomic_t ref;
80 int events_reported;
81
82 struct ib_ucm_file *file;
83 struct ib_cm_id *cm_id;
84 __u64 uid;
85
86 struct list_head events; /* list of pending events. */
87 struct list_head file_list; /* member in file ctx list */
88 };
89
90 struct ib_ucm_event {
91 struct ib_ucm_context *ctx;
92 struct list_head file_list; /* member in file event list */
93 struct list_head ctx_list; /* member in ctx event list */
94
95 struct ib_cm_id *cm_id;
96 struct ib_ucm_event_resp resp;
97 void *data;
98 void *info;
99 int data_len;
100 int info_len;
101 };
102
103 enum {
104 IB_UCM_MAJOR = 231,
105 IB_UCM_BASE_MINOR = 224,
106 IB_UCM_MAX_DEVICES = 32
107 };
108
109 #define IB_UCM_BASE_DEV MKDEV(IB_UCM_MAJOR, IB_UCM_BASE_MINOR)
110
111 static void ib_ucm_add_one(struct ib_device *device);
112 static void ib_ucm_remove_one(struct ib_device *device);
113
114 static struct ib_client ucm_client = {
115 .name = "ucm",
116 .add = ib_ucm_add_one,
117 .remove = ib_ucm_remove_one
118 };
119
120 static DEFINE_MUTEX(ctx_id_mutex);
121 static DEFINE_IDR(ctx_id_table);
122 static DECLARE_BITMAP(dev_map, IB_UCM_MAX_DEVICES);
123
124 static struct ib_ucm_context *ib_ucm_ctx_get(struct ib_ucm_file *file, int id)
125 {
126 struct ib_ucm_context *ctx;
127
128 mutex_lock(&ctx_id_mutex);
129 ctx = idr_find(&ctx_id_table, id);
130 if (!ctx)
131 ctx = ERR_PTR(-ENOENT);
132 else if (ctx->file != file)
133 ctx = ERR_PTR(-EINVAL);
134 else
135 atomic_inc(&ctx->ref);
136 mutex_unlock(&ctx_id_mutex);
137
138 return ctx;
139 }
140
141 static void ib_ucm_ctx_put(struct ib_ucm_context *ctx)
142 {
143 if (atomic_dec_and_test(&ctx->ref))
144 complete(&ctx->comp);
145 }
146
147 static inline int ib_ucm_new_cm_id(int event)
148 {
149 return event == IB_CM_REQ_RECEIVED || event == IB_CM_SIDR_REQ_RECEIVED;
150 }
151
152 static void ib_ucm_cleanup_events(struct ib_ucm_context *ctx)
153 {
154 struct ib_ucm_event *uevent;
155
156 mutex_lock(&ctx->file->file_mutex);
157 list_del(&ctx->file_list);
158 while (!list_empty(&ctx->events)) {
159
160 uevent = list_entry(ctx->events.next,
161 struct ib_ucm_event, ctx_list);
162 list_del(&uevent->file_list);
163 list_del(&uevent->ctx_list);
164 mutex_unlock(&ctx->file->file_mutex);
165
166 /* clear incoming connections. */
167 if (ib_ucm_new_cm_id(uevent->resp.event))
168 ib_destroy_cm_id(uevent->cm_id);
169
170 kfree(uevent);
171 mutex_lock(&ctx->file->file_mutex);
172 }
173 mutex_unlock(&ctx->file->file_mutex);
174 }
175
176 static struct ib_ucm_context *ib_ucm_ctx_alloc(struct ib_ucm_file *file)
177 {
178 struct ib_ucm_context *ctx;
179 int result;
180
181 ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
182 if (!ctx)
183 return NULL;
184
185 atomic_set(&ctx->ref, 1);
186 init_completion(&ctx->comp);
187 ctx->file = file;
188 INIT_LIST_HEAD(&ctx->events);
189
190 do {
191 result = idr_pre_get(&ctx_id_table, GFP_KERNEL);
192 if (!result)
193 goto error;
194
195 mutex_lock(&ctx_id_mutex);
196 result = idr_get_new(&ctx_id_table, ctx, &ctx->id);
197 mutex_unlock(&ctx_id_mutex);
198 } while (result == -EAGAIN);
199
200 if (result)
201 goto error;
202
203 list_add_tail(&ctx->file_list, &file->ctxs);
204 return ctx;
205
206 error:
207 kfree(ctx);
208 return NULL;
209 }
210
211 static void ib_ucm_event_req_get(struct ib_ucm_req_event_resp *ureq,
212 struct ib_cm_req_event_param *kreq)
213 {
214 ureq->remote_ca_guid = kreq->remote_ca_guid;
215 ureq->remote_qkey = kreq->remote_qkey;
216 ureq->remote_qpn = kreq->remote_qpn;
217 ureq->qp_type = kreq->qp_type;
218 ureq->starting_psn = kreq->starting_psn;
219 ureq->responder_resources = kreq->responder_resources;
220 ureq->initiator_depth = kreq->initiator_depth;
221 ureq->local_cm_response_timeout = kreq->local_cm_response_timeout;
222 ureq->flow_control = kreq->flow_control;
223 ureq->remote_cm_response_timeout = kreq->remote_cm_response_timeout;
224 ureq->retry_count = kreq->retry_count;
225 ureq->rnr_retry_count = kreq->rnr_retry_count;
226 ureq->srq = kreq->srq;
227 ureq->port = kreq->port;
228
229 ib_copy_path_rec_to_user(&ureq->primary_path, kreq->primary_path);
230 if (kreq->alternate_path)
231 ib_copy_path_rec_to_user(&ureq->alternate_path,
232 kreq->alternate_path);
233 }
234
235 static void ib_ucm_event_rep_get(struct ib_ucm_rep_event_resp *urep,
236 struct ib_cm_rep_event_param *krep)
237 {
238 urep->remote_ca_guid = krep->remote_ca_guid;
239 urep->remote_qkey = krep->remote_qkey;
240 urep->remote_qpn = krep->remote_qpn;
241 urep->starting_psn = krep->starting_psn;
242 urep->responder_resources = krep->responder_resources;
243 urep->initiator_depth = krep->initiator_depth;
244 urep->target_ack_delay = krep->target_ack_delay;
245 urep->failover_accepted = krep->failover_accepted;
246 urep->flow_control = krep->flow_control;
247 urep->rnr_retry_count = krep->rnr_retry_count;
248 urep->srq = krep->srq;
249 }
250
251 static void ib_ucm_event_sidr_rep_get(struct ib_ucm_sidr_rep_event_resp *urep,
252 struct ib_cm_sidr_rep_event_param *krep)
253 {
254 urep->status = krep->status;
255 urep->qkey = krep->qkey;
256 urep->qpn = krep->qpn;
257 };
258
259 static int ib_ucm_event_process(struct ib_cm_event *evt,
260 struct ib_ucm_event *uvt)
261 {
262 void *info = NULL;
263
264 switch (evt->event) {
265 case IB_CM_REQ_RECEIVED:
266 ib_ucm_event_req_get(&uvt->resp.u.req_resp,
267 &evt->param.req_rcvd);
268 uvt->data_len = IB_CM_REQ_PRIVATE_DATA_SIZE;
269 uvt->resp.present = IB_UCM_PRES_PRIMARY;
270 uvt->resp.present |= (evt->param.req_rcvd.alternate_path ?
271 IB_UCM_PRES_ALTERNATE : 0);
272 break;
273 case IB_CM_REP_RECEIVED:
274 ib_ucm_event_rep_get(&uvt->resp.u.rep_resp,
275 &evt->param.rep_rcvd);
276 uvt->data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
277 break;
278 case IB_CM_RTU_RECEIVED:
279 uvt->data_len = IB_CM_RTU_PRIVATE_DATA_SIZE;
280 uvt->resp.u.send_status = evt->param.send_status;
281 break;
282 case IB_CM_DREQ_RECEIVED:
283 uvt->data_len = IB_CM_DREQ_PRIVATE_DATA_SIZE;
284 uvt->resp.u.send_status = evt->param.send_status;
285 break;
286 case IB_CM_DREP_RECEIVED:
287 uvt->data_len = IB_CM_DREP_PRIVATE_DATA_SIZE;
288 uvt->resp.u.send_status = evt->param.send_status;
289 break;
290 case IB_CM_MRA_RECEIVED:
291 uvt->resp.u.mra_resp.timeout =
292 evt->param.mra_rcvd.service_timeout;
293 uvt->data_len = IB_CM_MRA_PRIVATE_DATA_SIZE;
294 break;
295 case IB_CM_REJ_RECEIVED:
296 uvt->resp.u.rej_resp.reason = evt->param.rej_rcvd.reason;
297 uvt->data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
298 uvt->info_len = evt->param.rej_rcvd.ari_length;
299 info = evt->param.rej_rcvd.ari;
300 break;
301 case IB_CM_LAP_RECEIVED:
302 ib_copy_path_rec_to_user(&uvt->resp.u.lap_resp.path,
303 evt->param.lap_rcvd.alternate_path);
304 uvt->data_len = IB_CM_LAP_PRIVATE_DATA_SIZE;
305 uvt->resp.present = IB_UCM_PRES_ALTERNATE;
306 break;
307 case IB_CM_APR_RECEIVED:
308 uvt->resp.u.apr_resp.status = evt->param.apr_rcvd.ap_status;
309 uvt->data_len = IB_CM_APR_PRIVATE_DATA_SIZE;
310 uvt->info_len = evt->param.apr_rcvd.info_len;
311 info = evt->param.apr_rcvd.apr_info;
312 break;
313 case IB_CM_SIDR_REQ_RECEIVED:
314 uvt->resp.u.sidr_req_resp.pkey =
315 evt->param.sidr_req_rcvd.pkey;
316 uvt->resp.u.sidr_req_resp.port =
317 evt->param.sidr_req_rcvd.port;
318 uvt->data_len = IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE;
319 break;
320 case IB_CM_SIDR_REP_RECEIVED:
321 ib_ucm_event_sidr_rep_get(&uvt->resp.u.sidr_rep_resp,
322 &evt->param.sidr_rep_rcvd);
323 uvt->data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
324 uvt->info_len = evt->param.sidr_rep_rcvd.info_len;
325 info = evt->param.sidr_rep_rcvd.info;
326 break;
327 default:
328 uvt->resp.u.send_status = evt->param.send_status;
329 break;
330 }
331
332 if (uvt->data_len) {
333 uvt->data = kmemdup(evt->private_data, uvt->data_len, GFP_KERNEL);
334 if (!uvt->data)
335 goto err1;
336
337 uvt->resp.present |= IB_UCM_PRES_DATA;
338 }
339
340 if (uvt->info_len) {
341 uvt->info = kmemdup(info, uvt->info_len, GFP_KERNEL);
342 if (!uvt->info)
343 goto err2;
344
345 uvt->resp.present |= IB_UCM_PRES_INFO;
346 }
347 return 0;
348
349 err2:
350 kfree(uvt->data);
351 err1:
352 return -ENOMEM;
353 }
354
355 static int ib_ucm_event_handler(struct ib_cm_id *cm_id,
356 struct ib_cm_event *event)
357 {
358 struct ib_ucm_event *uevent;
359 struct ib_ucm_context *ctx;
360 int result = 0;
361
362 ctx = cm_id->context;
363
364 uevent = kzalloc(sizeof *uevent, GFP_KERNEL);
365 if (!uevent)
366 goto err1;
367
368 uevent->ctx = ctx;
369 uevent->cm_id = cm_id;
370 uevent->resp.uid = ctx->uid;
371 uevent->resp.id = ctx->id;
372 uevent->resp.event = event->event;
373
374 result = ib_ucm_event_process(event, uevent);
375 if (result)
376 goto err2;
377
378 mutex_lock(&ctx->file->file_mutex);
379 list_add_tail(&uevent->file_list, &ctx->file->events);
380 list_add_tail(&uevent->ctx_list, &ctx->events);
381 wake_up_interruptible(&ctx->file->poll_wait);
382 mutex_unlock(&ctx->file->file_mutex);
383 return 0;
384
385 err2:
386 kfree(uevent);
387 err1:
388 /* Destroy new cm_id's */
389 return ib_ucm_new_cm_id(event->event);
390 }
391
392 static ssize_t ib_ucm_event(struct ib_ucm_file *file,
393 const char __user *inbuf,
394 int in_len, int out_len)
395 {
396 struct ib_ucm_context *ctx;
397 struct ib_ucm_event_get cmd;
398 struct ib_ucm_event *uevent;
399 int result = 0;
400 DEFINE_WAIT(wait);
401
402 if (out_len < sizeof(struct ib_ucm_event_resp))
403 return -ENOSPC;
404
405 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
406 return -EFAULT;
407
408 mutex_lock(&file->file_mutex);
409 while (list_empty(&file->events)) {
410
411 if (file->filp->f_flags & O_NONBLOCK) {
412 result = -EAGAIN;
413 break;
414 }
415
416 if (signal_pending(current)) {
417 result = -ERESTARTSYS;
418 break;
419 }
420
421 prepare_to_wait(&file->poll_wait, &wait, TASK_INTERRUPTIBLE);
422
423 mutex_unlock(&file->file_mutex);
424 schedule();
425 mutex_lock(&file->file_mutex);
426
427 finish_wait(&file->poll_wait, &wait);
428 }
429
430 if (result)
431 goto done;
432
433 uevent = list_entry(file->events.next, struct ib_ucm_event, file_list);
434
435 if (ib_ucm_new_cm_id(uevent->resp.event)) {
436 ctx = ib_ucm_ctx_alloc(file);
437 if (!ctx) {
438 result = -ENOMEM;
439 goto done;
440 }
441
442 ctx->cm_id = uevent->cm_id;
443 ctx->cm_id->context = ctx;
444 uevent->resp.id = ctx->id;
445 }
446
447 if (copy_to_user((void __user *)(unsigned long)cmd.response,
448 &uevent->resp, sizeof(uevent->resp))) {
449 result = -EFAULT;
450 goto done;
451 }
452
453 if (uevent->data) {
454 if (cmd.data_len < uevent->data_len) {
455 result = -ENOMEM;
456 goto done;
457 }
458 if (copy_to_user((void __user *)(unsigned long)cmd.data,
459 uevent->data, uevent->data_len)) {
460 result = -EFAULT;
461 goto done;
462 }
463 }
464
465 if (uevent->info) {
466 if (cmd.info_len < uevent->info_len) {
467 result = -ENOMEM;
468 goto done;
469 }
470 if (copy_to_user((void __user *)(unsigned long)cmd.info,
471 uevent->info, uevent->info_len)) {
472 result = -EFAULT;
473 goto done;
474 }
475 }
476
477 list_del(&uevent->file_list);
478 list_del(&uevent->ctx_list);
479 uevent->ctx->events_reported++;
480
481 kfree(uevent->data);
482 kfree(uevent->info);
483 kfree(uevent);
484 done:
485 mutex_unlock(&file->file_mutex);
486 return result;
487 }
488
489 static ssize_t ib_ucm_create_id(struct ib_ucm_file *file,
490 const char __user *inbuf,
491 int in_len, int out_len)
492 {
493 struct ib_ucm_create_id cmd;
494 struct ib_ucm_create_id_resp resp;
495 struct ib_ucm_context *ctx;
496 int result;
497
498 if (out_len < sizeof(resp))
499 return -ENOSPC;
500
501 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
502 return -EFAULT;
503
504 mutex_lock(&file->file_mutex);
505 ctx = ib_ucm_ctx_alloc(file);
506 mutex_unlock(&file->file_mutex);
507 if (!ctx)
508 return -ENOMEM;
509
510 ctx->uid = cmd.uid;
511 ctx->cm_id = ib_create_cm_id(file->device->ib_dev,
512 ib_ucm_event_handler, ctx);
513 if (IS_ERR(ctx->cm_id)) {
514 result = PTR_ERR(ctx->cm_id);
515 goto err1;
516 }
517
518 resp.id = ctx->id;
519 if (copy_to_user((void __user *)(unsigned long)cmd.response,
520 &resp, sizeof(resp))) {
521 result = -EFAULT;
522 goto err2;
523 }
524 return 0;
525
526 err2:
527 ib_destroy_cm_id(ctx->cm_id);
528 err1:
529 mutex_lock(&ctx_id_mutex);
530 idr_remove(&ctx_id_table, ctx->id);
531 mutex_unlock(&ctx_id_mutex);
532 kfree(ctx);
533 return result;
534 }
535
536 static ssize_t ib_ucm_destroy_id(struct ib_ucm_file *file,
537 const char __user *inbuf,
538 int in_len, int out_len)
539 {
540 struct ib_ucm_destroy_id cmd;
541 struct ib_ucm_destroy_id_resp resp;
542 struct ib_ucm_context *ctx;
543 int result = 0;
544
545 if (out_len < sizeof(resp))
546 return -ENOSPC;
547
548 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
549 return -EFAULT;
550
551 mutex_lock(&ctx_id_mutex);
552 ctx = idr_find(&ctx_id_table, cmd.id);
553 if (!ctx)
554 ctx = ERR_PTR(-ENOENT);
555 else if (ctx->file != file)
556 ctx = ERR_PTR(-EINVAL);
557 else
558 idr_remove(&ctx_id_table, ctx->id);
559 mutex_unlock(&ctx_id_mutex);
560
561 if (IS_ERR(ctx))
562 return PTR_ERR(ctx);
563
564 ib_ucm_ctx_put(ctx);
565 wait_for_completion(&ctx->comp);
566
567 /* No new events will be generated after destroying the cm_id. */
568 ib_destroy_cm_id(ctx->cm_id);
569 /* Cleanup events not yet reported to the user. */
570 ib_ucm_cleanup_events(ctx);
571
572 resp.events_reported = ctx->events_reported;
573 if (copy_to_user((void __user *)(unsigned long)cmd.response,
574 &resp, sizeof(resp)))
575 result = -EFAULT;
576
577 kfree(ctx);
578 return result;
579 }
580
581 static ssize_t ib_ucm_attr_id(struct ib_ucm_file *file,
582 const char __user *inbuf,
583 int in_len, int out_len)
584 {
585 struct ib_ucm_attr_id_resp resp;
586 struct ib_ucm_attr_id cmd;
587 struct ib_ucm_context *ctx;
588 int result = 0;
589
590 if (out_len < sizeof(resp))
591 return -ENOSPC;
592
593 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
594 return -EFAULT;
595
596 ctx = ib_ucm_ctx_get(file, cmd.id);
597 if (IS_ERR(ctx))
598 return PTR_ERR(ctx);
599
600 resp.service_id = ctx->cm_id->service_id;
601 resp.service_mask = ctx->cm_id->service_mask;
602 resp.local_id = ctx->cm_id->local_id;
603 resp.remote_id = ctx->cm_id->remote_id;
604
605 if (copy_to_user((void __user *)(unsigned long)cmd.response,
606 &resp, sizeof(resp)))
607 result = -EFAULT;
608
609 ib_ucm_ctx_put(ctx);
610 return result;
611 }
612
613 static ssize_t ib_ucm_init_qp_attr(struct ib_ucm_file *file,
614 const char __user *inbuf,
615 int in_len, int out_len)
616 {
617 struct ib_uverbs_qp_attr resp;
618 struct ib_ucm_init_qp_attr cmd;
619 struct ib_ucm_context *ctx;
620 struct ib_qp_attr qp_attr;
621 int result = 0;
622
623 if (out_len < sizeof(resp))
624 return -ENOSPC;
625
626 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
627 return -EFAULT;
628
629 ctx = ib_ucm_ctx_get(file, cmd.id);
630 if (IS_ERR(ctx))
631 return PTR_ERR(ctx);
632
633 resp.qp_attr_mask = 0;
634 memset(&qp_attr, 0, sizeof qp_attr);
635 qp_attr.qp_state = cmd.qp_state;
636 result = ib_cm_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask);
637 if (result)
638 goto out;
639
640 ib_copy_qp_attr_to_user(&resp, &qp_attr);
641
642 if (copy_to_user((void __user *)(unsigned long)cmd.response,
643 &resp, sizeof(resp)))
644 result = -EFAULT;
645
646 out:
647 ib_ucm_ctx_put(ctx);
648 return result;
649 }
650
651 static int ucm_validate_listen(__be64 service_id, __be64 service_mask)
652 {
653 service_id &= service_mask;
654
655 if (((service_id & IB_CMA_SERVICE_ID_MASK) == IB_CMA_SERVICE_ID) ||
656 ((service_id & IB_SDP_SERVICE_ID_MASK) == IB_SDP_SERVICE_ID))
657 return -EINVAL;
658
659 return 0;
660 }
661
662 static ssize_t ib_ucm_listen(struct ib_ucm_file *file,
663 const char __user *inbuf,
664 int in_len, int out_len)
665 {
666 struct ib_ucm_listen cmd;
667 struct ib_ucm_context *ctx;
668 int result;
669
670 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
671 return -EFAULT;
672
673 ctx = ib_ucm_ctx_get(file, cmd.id);
674 if (IS_ERR(ctx))
675 return PTR_ERR(ctx);
676
677 result = ucm_validate_listen(cmd.service_id, cmd.service_mask);
678 if (result)
679 goto out;
680
681 result = ib_cm_listen(ctx->cm_id, cmd.service_id, cmd.service_mask,
682 NULL);
683 out:
684 ib_ucm_ctx_put(ctx);
685 return result;
686 }
687
688 static ssize_t ib_ucm_notify(struct ib_ucm_file *file,
689 const char __user *inbuf,
690 int in_len, int out_len)
691 {
692 struct ib_ucm_notify cmd;
693 struct ib_ucm_context *ctx;
694 int result;
695
696 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
697 return -EFAULT;
698
699 ctx = ib_ucm_ctx_get(file, cmd.id);
700 if (IS_ERR(ctx))
701 return PTR_ERR(ctx);
702
703 result = ib_cm_notify(ctx->cm_id, (enum ib_event_type) cmd.event);
704 ib_ucm_ctx_put(ctx);
705 return result;
706 }
707
708 static int ib_ucm_alloc_data(const void **dest, u64 src, u32 len)
709 {
710 void *data;
711
712 *dest = NULL;
713
714 if (!len)
715 return 0;
716
717 data = kmalloc(len, GFP_KERNEL);
718 if (!data)
719 return -ENOMEM;
720
721 if (copy_from_user(data, (void __user *)(unsigned long)src, len)) {
722 kfree(data);
723 return -EFAULT;
724 }
725
726 *dest = data;
727 return 0;
728 }
729
730 static int ib_ucm_path_get(struct ib_sa_path_rec **path, u64 src)
731 {
732 struct ib_user_path_rec upath;
733 struct ib_sa_path_rec *sa_path;
734
735 *path = NULL;
736
737 if (!src)
738 return 0;
739
740 sa_path = kmalloc(sizeof(*sa_path), GFP_KERNEL);
741 if (!sa_path)
742 return -ENOMEM;
743
744 if (copy_from_user(&upath, (void __user *)(unsigned long)src,
745 sizeof(upath))) {
746
747 kfree(sa_path);
748 return -EFAULT;
749 }
750
751 ib_copy_path_rec_from_user(sa_path, &upath);
752 *path = sa_path;
753 return 0;
754 }
755
756 static ssize_t ib_ucm_send_req(struct ib_ucm_file *file,
757 const char __user *inbuf,
758 int in_len, int out_len)
759 {
760 struct ib_cm_req_param param;
761 struct ib_ucm_context *ctx;
762 struct ib_ucm_req cmd;
763 int result;
764
765 param.private_data = NULL;
766 param.primary_path = NULL;
767 param.alternate_path = NULL;
768
769 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
770 return -EFAULT;
771
772 result = ib_ucm_alloc_data(&param.private_data, cmd.data, cmd.len);
773 if (result)
774 goto done;
775
776 result = ib_ucm_path_get(&param.primary_path, cmd.primary_path);
777 if (result)
778 goto done;
779
780 result = ib_ucm_path_get(&param.alternate_path, cmd.alternate_path);
781 if (result)
782 goto done;
783
784 param.private_data_len = cmd.len;
785 param.service_id = cmd.sid;
786 param.qp_num = cmd.qpn;
787 param.qp_type = cmd.qp_type;
788 param.starting_psn = cmd.psn;
789 param.peer_to_peer = cmd.peer_to_peer;
790 param.responder_resources = cmd.responder_resources;
791 param.initiator_depth = cmd.initiator_depth;
792 param.remote_cm_response_timeout = cmd.remote_cm_response_timeout;
793 param.flow_control = cmd.flow_control;
794 param.local_cm_response_timeout = cmd.local_cm_response_timeout;
795 param.retry_count = cmd.retry_count;
796 param.rnr_retry_count = cmd.rnr_retry_count;
797 param.max_cm_retries = cmd.max_cm_retries;
798 param.srq = cmd.srq;
799
800 ctx = ib_ucm_ctx_get(file, cmd.id);
801 if (!IS_ERR(ctx)) {
802 result = ib_send_cm_req(ctx->cm_id, &param);
803 ib_ucm_ctx_put(ctx);
804 } else
805 result = PTR_ERR(ctx);
806
807 done:
808 kfree(param.private_data);
809 kfree(param.primary_path);
810 kfree(param.alternate_path);
811 return result;
812 }
813
814 static ssize_t ib_ucm_send_rep(struct ib_ucm_file *file,
815 const char __user *inbuf,
816 int in_len, int out_len)
817 {
818 struct ib_cm_rep_param param;
819 struct ib_ucm_context *ctx;
820 struct ib_ucm_rep cmd;
821 int result;
822
823 param.private_data = NULL;
824
825 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
826 return -EFAULT;
827
828 result = ib_ucm_alloc_data(&param.private_data, cmd.data, cmd.len);
829 if (result)
830 return result;
831
832 param.qp_num = cmd.qpn;
833 param.starting_psn = cmd.psn;
834 param.private_data_len = cmd.len;
835 param.responder_resources = cmd.responder_resources;
836 param.initiator_depth = cmd.initiator_depth;
837 param.target_ack_delay = cmd.target_ack_delay;
838 param.failover_accepted = cmd.failover_accepted;
839 param.flow_control = cmd.flow_control;
840 param.rnr_retry_count = cmd.rnr_retry_count;
841 param.srq = cmd.srq;
842
843 ctx = ib_ucm_ctx_get(file, cmd.id);
844 if (!IS_ERR(ctx)) {
845 ctx->uid = cmd.uid;
846 result = ib_send_cm_rep(ctx->cm_id, &param);
847 ib_ucm_ctx_put(ctx);
848 } else
849 result = PTR_ERR(ctx);
850
851 kfree(param.private_data);
852 return result;
853 }
854
855 static ssize_t ib_ucm_send_private_data(struct ib_ucm_file *file,
856 const char __user *inbuf, int in_len,
857 int (*func)(struct ib_cm_id *cm_id,
858 const void *private_data,
859 u8 private_data_len))
860 {
861 struct ib_ucm_private_data cmd;
862 struct ib_ucm_context *ctx;
863 const void *private_data = NULL;
864 int result;
865
866 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
867 return -EFAULT;
868
869 result = ib_ucm_alloc_data(&private_data, cmd.data, cmd.len);
870 if (result)
871 return result;
872
873 ctx = ib_ucm_ctx_get(file, cmd.id);
874 if (!IS_ERR(ctx)) {
875 result = func(ctx->cm_id, private_data, cmd.len);
876 ib_ucm_ctx_put(ctx);
877 } else
878 result = PTR_ERR(ctx);
879
880 kfree(private_data);
881 return result;
882 }
883
884 static ssize_t ib_ucm_send_rtu(struct ib_ucm_file *file,
885 const char __user *inbuf,
886 int in_len, int out_len)
887 {
888 return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_rtu);
889 }
890
891 static ssize_t ib_ucm_send_dreq(struct ib_ucm_file *file,
892 const char __user *inbuf,
893 int in_len, int out_len)
894 {
895 return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_dreq);
896 }
897
898 static ssize_t ib_ucm_send_drep(struct ib_ucm_file *file,
899 const char __user *inbuf,
900 int in_len, int out_len)
901 {
902 return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_drep);
903 }
904
905 static ssize_t ib_ucm_send_info(struct ib_ucm_file *file,
906 const char __user *inbuf, int in_len,
907 int (*func)(struct ib_cm_id *cm_id,
908 int status,
909 const void *info,
910 u8 info_len,
911 const void *data,
912 u8 data_len))
913 {
914 struct ib_ucm_context *ctx;
915 struct ib_ucm_info cmd;
916 const void *data = NULL;
917 const void *info = NULL;
918 int result;
919
920 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
921 return -EFAULT;
922
923 result = ib_ucm_alloc_data(&data, cmd.data, cmd.data_len);
924 if (result)
925 goto done;
926
927 result = ib_ucm_alloc_data(&info, cmd.info, cmd.info_len);
928 if (result)
929 goto done;
930
931 ctx = ib_ucm_ctx_get(file, cmd.id);
932 if (!IS_ERR(ctx)) {
933 result = func(ctx->cm_id, cmd.status, info, cmd.info_len,
934 data, cmd.data_len);
935 ib_ucm_ctx_put(ctx);
936 } else
937 result = PTR_ERR(ctx);
938
939 done:
940 kfree(data);
941 kfree(info);
942 return result;
943 }
944
945 static ssize_t ib_ucm_send_rej(struct ib_ucm_file *file,
946 const char __user *inbuf,
947 int in_len, int out_len)
948 {
949 return ib_ucm_send_info(file, inbuf, in_len, (void *)ib_send_cm_rej);
950 }
951
952 static ssize_t ib_ucm_send_apr(struct ib_ucm_file *file,
953 const char __user *inbuf,
954 int in_len, int out_len)
955 {
956 return ib_ucm_send_info(file, inbuf, in_len, (void *)ib_send_cm_apr);
957 }
958
959 static ssize_t ib_ucm_send_mra(struct ib_ucm_file *file,
960 const char __user *inbuf,
961 int in_len, int out_len)
962 {
963 struct ib_ucm_context *ctx;
964 struct ib_ucm_mra cmd;
965 const void *data = NULL;
966 int result;
967
968 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
969 return -EFAULT;
970
971 result = ib_ucm_alloc_data(&data, cmd.data, cmd.len);
972 if (result)
973 return result;
974
975 ctx = ib_ucm_ctx_get(file, cmd.id);
976 if (!IS_ERR(ctx)) {
977 result = ib_send_cm_mra(ctx->cm_id, cmd.timeout, data, cmd.len);
978 ib_ucm_ctx_put(ctx);
979 } else
980 result = PTR_ERR(ctx);
981
982 kfree(data);
983 return result;
984 }
985
986 static ssize_t ib_ucm_send_lap(struct ib_ucm_file *file,
987 const char __user *inbuf,
988 int in_len, int out_len)
989 {
990 struct ib_ucm_context *ctx;
991 struct ib_sa_path_rec *path = NULL;
992 struct ib_ucm_lap cmd;
993 const void *data = NULL;
994 int result;
995
996 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
997 return -EFAULT;
998
999 result = ib_ucm_alloc_data(&data, cmd.data, cmd.len);
1000 if (result)
1001 goto done;
1002
1003 result = ib_ucm_path_get(&path, cmd.path);
1004 if (result)
1005 goto done;
1006
1007 ctx = ib_ucm_ctx_get(file, cmd.id);
1008 if (!IS_ERR(ctx)) {
1009 result = ib_send_cm_lap(ctx->cm_id, path, data, cmd.len);
1010 ib_ucm_ctx_put(ctx);
1011 } else
1012 result = PTR_ERR(ctx);
1013
1014 done:
1015 kfree(data);
1016 kfree(path);
1017 return result;
1018 }
1019
1020 static ssize_t ib_ucm_send_sidr_req(struct ib_ucm_file *file,
1021 const char __user *inbuf,
1022 int in_len, int out_len)
1023 {
1024 struct ib_cm_sidr_req_param param;
1025 struct ib_ucm_context *ctx;
1026 struct ib_ucm_sidr_req cmd;
1027 int result;
1028
1029 param.private_data = NULL;
1030 param.path = NULL;
1031
1032 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
1033 return -EFAULT;
1034
1035 result = ib_ucm_alloc_data(&param.private_data, cmd.data, cmd.len);
1036 if (result)
1037 goto done;
1038
1039 result = ib_ucm_path_get(&param.path, cmd.path);
1040 if (result)
1041 goto done;
1042
1043 param.private_data_len = cmd.len;
1044 param.service_id = cmd.sid;
1045 param.timeout_ms = cmd.timeout;
1046 param.max_cm_retries = cmd.max_cm_retries;
1047
1048 ctx = ib_ucm_ctx_get(file, cmd.id);
1049 if (!IS_ERR(ctx)) {
1050 result = ib_send_cm_sidr_req(ctx->cm_id, &param);
1051 ib_ucm_ctx_put(ctx);
1052 } else
1053 result = PTR_ERR(ctx);
1054
1055 done:
1056 kfree(param.private_data);
1057 kfree(param.path);
1058 return result;
1059 }
1060
1061 static ssize_t ib_ucm_send_sidr_rep(struct ib_ucm_file *file,
1062 const char __user *inbuf,
1063 int in_len, int out_len)
1064 {
1065 struct ib_cm_sidr_rep_param param;
1066 struct ib_ucm_sidr_rep cmd;
1067 struct ib_ucm_context *ctx;
1068 int result;
1069
1070 param.info = NULL;
1071
1072 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
1073 return -EFAULT;
1074
1075 result = ib_ucm_alloc_data(&param.private_data,
1076 cmd.data, cmd.data_len);
1077 if (result)
1078 goto done;
1079
1080 result = ib_ucm_alloc_data(&param.info, cmd.info, cmd.info_len);
1081 if (result)
1082 goto done;
1083
1084 param.qp_num = cmd.qpn;
1085 param.qkey = cmd.qkey;
1086 param.status = cmd.status;
1087 param.info_length = cmd.info_len;
1088 param.private_data_len = cmd.data_len;
1089
1090 ctx = ib_ucm_ctx_get(file, cmd.id);
1091 if (!IS_ERR(ctx)) {
1092 result = ib_send_cm_sidr_rep(ctx->cm_id, &param);
1093 ib_ucm_ctx_put(ctx);
1094 } else
1095 result = PTR_ERR(ctx);
1096
1097 done:
1098 kfree(param.private_data);
1099 kfree(param.info);
1100 return result;
1101 }
1102
1103 static ssize_t (*ucm_cmd_table[])(struct ib_ucm_file *file,
1104 const char __user *inbuf,
1105 int in_len, int out_len) = {
1106 [IB_USER_CM_CMD_CREATE_ID] = ib_ucm_create_id,
1107 [IB_USER_CM_CMD_DESTROY_ID] = ib_ucm_destroy_id,
1108 [IB_USER_CM_CMD_ATTR_ID] = ib_ucm_attr_id,
1109 [IB_USER_CM_CMD_LISTEN] = ib_ucm_listen,
1110 [IB_USER_CM_CMD_NOTIFY] = ib_ucm_notify,
1111 [IB_USER_CM_CMD_SEND_REQ] = ib_ucm_send_req,
1112 [IB_USER_CM_CMD_SEND_REP] = ib_ucm_send_rep,
1113 [IB_USER_CM_CMD_SEND_RTU] = ib_ucm_send_rtu,
1114 [IB_USER_CM_CMD_SEND_DREQ] = ib_ucm_send_dreq,
1115 [IB_USER_CM_CMD_SEND_DREP] = ib_ucm_send_drep,
1116 [IB_USER_CM_CMD_SEND_REJ] = ib_ucm_send_rej,
1117 [IB_USER_CM_CMD_SEND_MRA] = ib_ucm_send_mra,
1118 [IB_USER_CM_CMD_SEND_LAP] = ib_ucm_send_lap,
1119 [IB_USER_CM_CMD_SEND_APR] = ib_ucm_send_apr,
1120 [IB_USER_CM_CMD_SEND_SIDR_REQ] = ib_ucm_send_sidr_req,
1121 [IB_USER_CM_CMD_SEND_SIDR_REP] = ib_ucm_send_sidr_rep,
1122 [IB_USER_CM_CMD_EVENT] = ib_ucm_event,
1123 [IB_USER_CM_CMD_INIT_QP_ATTR] = ib_ucm_init_qp_attr,
1124 };
1125
1126 static ssize_t ib_ucm_write(struct file *filp, const char __user *buf,
1127 size_t len, loff_t *pos)
1128 {
1129 struct ib_ucm_file *file = filp->private_data;
1130 struct ib_ucm_cmd_hdr hdr;
1131 ssize_t result;
1132
1133 if (len < sizeof(hdr))
1134 return -EINVAL;
1135
1136 if (copy_from_user(&hdr, buf, sizeof(hdr)))
1137 return -EFAULT;
1138
1139 if (hdr.cmd < 0 || hdr.cmd >= ARRAY_SIZE(ucm_cmd_table))
1140 return -EINVAL;
1141
1142 if (hdr.in + sizeof(hdr) > len)
1143 return -EINVAL;
1144
1145 result = ucm_cmd_table[hdr.cmd](file, buf + sizeof(hdr),
1146 hdr.in, hdr.out);
1147 if (!result)
1148 result = len;
1149
1150 return result;
1151 }
1152
1153 static unsigned int ib_ucm_poll(struct file *filp,
1154 struct poll_table_struct *wait)
1155 {
1156 struct ib_ucm_file *file = filp->private_data;
1157 unsigned int mask = 0;
1158
1159 poll_wait(filp, &file->poll_wait, wait);
1160
1161 if (!list_empty(&file->events))
1162 mask = POLLIN | POLLRDNORM;
1163
1164 return mask;
1165 }
1166
1167 static int ib_ucm_open(struct inode *inode, struct file *filp)
1168 {
1169 struct ib_ucm_file *file;
1170
1171 file = kmalloc(sizeof(*file), GFP_KERNEL);
1172 if (!file)
1173 return -ENOMEM;
1174
1175 INIT_LIST_HEAD(&file->events);
1176 INIT_LIST_HEAD(&file->ctxs);
1177 init_waitqueue_head(&file->poll_wait);
1178
1179 mutex_init(&file->file_mutex);
1180
1181 filp->private_data = file;
1182 file->filp = filp;
1183 file->device = container_of(inode->i_cdev, struct ib_ucm_device, dev);
1184
1185 return 0;
1186 }
1187
1188 static int ib_ucm_close(struct inode *inode, struct file *filp)
1189 {
1190 struct ib_ucm_file *file = filp->private_data;
1191 struct ib_ucm_context *ctx;
1192
1193 mutex_lock(&file->file_mutex);
1194 while (!list_empty(&file->ctxs)) {
1195 ctx = list_entry(file->ctxs.next,
1196 struct ib_ucm_context, file_list);
1197 mutex_unlock(&file->file_mutex);
1198
1199 mutex_lock(&ctx_id_mutex);
1200 idr_remove(&ctx_id_table, ctx->id);
1201 mutex_unlock(&ctx_id_mutex);
1202
1203 ib_destroy_cm_id(ctx->cm_id);
1204 ib_ucm_cleanup_events(ctx);
1205 kfree(ctx);
1206
1207 mutex_lock(&file->file_mutex);
1208 }
1209 mutex_unlock(&file->file_mutex);
1210 kfree(file);
1211 return 0;
1212 }
1213
1214 static void ib_ucm_release_class_dev(struct class_device *class_dev)
1215 {
1216 struct ib_ucm_device *dev;
1217
1218 dev = container_of(class_dev, struct ib_ucm_device, class_dev);
1219 cdev_del(&dev->dev);
1220 clear_bit(dev->devnum, dev_map);
1221 kfree(dev);
1222 }
1223
1224 static struct file_operations ucm_fops = {
1225 .owner = THIS_MODULE,
1226 .open = ib_ucm_open,
1227 .release = ib_ucm_close,
1228 .write = ib_ucm_write,
1229 .poll = ib_ucm_poll,
1230 };
1231
1232 static struct class ucm_class = {
1233 .name = "infiniband_cm",
1234 .release = ib_ucm_release_class_dev
1235 };
1236
1237 static ssize_t show_ibdev(struct class_device *class_dev, char *buf)
1238 {
1239 struct ib_ucm_device *dev;
1240
1241 dev = container_of(class_dev, struct ib_ucm_device, class_dev);
1242 return sprintf(buf, "%s\n", dev->ib_dev->name);
1243 }
1244 static CLASS_DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL);
1245
1246 static void ib_ucm_add_one(struct ib_device *device)
1247 {
1248 struct ib_ucm_device *ucm_dev;
1249
1250 if (!device->alloc_ucontext ||
1251 rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
1252 return;
1253
1254 ucm_dev = kzalloc(sizeof *ucm_dev, GFP_KERNEL);
1255 if (!ucm_dev)
1256 return;
1257
1258 ucm_dev->ib_dev = device;
1259
1260 ucm_dev->devnum = find_first_zero_bit(dev_map, IB_UCM_MAX_DEVICES);
1261 if (ucm_dev->devnum >= IB_UCM_MAX_DEVICES)
1262 goto err;
1263
1264 set_bit(ucm_dev->devnum, dev_map);
1265
1266 cdev_init(&ucm_dev->dev, &ucm_fops);
1267 ucm_dev->dev.owner = THIS_MODULE;
1268 kobject_set_name(&ucm_dev->dev.kobj, "ucm%d", ucm_dev->devnum);
1269 if (cdev_add(&ucm_dev->dev, IB_UCM_BASE_DEV + ucm_dev->devnum, 1))
1270 goto err;
1271
1272 ucm_dev->class_dev.class = &ucm_class;
1273 ucm_dev->class_dev.dev = device->dma_device;
1274 ucm_dev->class_dev.devt = ucm_dev->dev.dev;
1275 snprintf(ucm_dev->class_dev.class_id, BUS_ID_SIZE, "ucm%d",
1276 ucm_dev->devnum);
1277 if (class_device_register(&ucm_dev->class_dev))
1278 goto err_cdev;
1279
1280 if (class_device_create_file(&ucm_dev->class_dev,
1281 &class_device_attr_ibdev))
1282 goto err_class;
1283
1284 ib_set_client_data(device, &ucm_client, ucm_dev);
1285 return;
1286
1287 err_class:
1288 class_device_unregister(&ucm_dev->class_dev);
1289 err_cdev:
1290 cdev_del(&ucm_dev->dev);
1291 clear_bit(ucm_dev->devnum, dev_map);
1292 err:
1293 kfree(ucm_dev);
1294 return;
1295 }
1296
1297 static void ib_ucm_remove_one(struct ib_device *device)
1298 {
1299 struct ib_ucm_device *ucm_dev = ib_get_client_data(device, &ucm_client);
1300
1301 if (!ucm_dev)
1302 return;
1303
1304 class_device_unregister(&ucm_dev->class_dev);
1305 }
1306
1307 static ssize_t show_abi_version(struct class *class, char *buf)
1308 {
1309 return sprintf(buf, "%d\n", IB_USER_CM_ABI_VERSION);
1310 }
1311 static CLASS_ATTR(abi_version, S_IRUGO, show_abi_version, NULL);
1312
1313 static int __init ib_ucm_init(void)
1314 {
1315 int ret;
1316
1317 ret = register_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES,
1318 "infiniband_cm");
1319 if (ret) {
1320 printk(KERN_ERR "ucm: couldn't register device number\n");
1321 goto err;
1322 }
1323
1324 ret = class_register(&ucm_class);
1325 if (ret) {
1326 printk(KERN_ERR "ucm: couldn't create class infiniband_cm\n");
1327 goto err_chrdev;
1328 }
1329
1330 ret = class_create_file(&ucm_class, &class_attr_abi_version);
1331 if (ret) {
1332 printk(KERN_ERR "ucm: couldn't create abi_version attribute\n");
1333 goto err_class;
1334 }
1335
1336 ret = ib_register_client(&ucm_client);
1337 if (ret) {
1338 printk(KERN_ERR "ucm: couldn't register client\n");
1339 goto err_class;
1340 }
1341 return 0;
1342
1343 err_class:
1344 class_unregister(&ucm_class);
1345 err_chrdev:
1346 unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES);
1347 err:
1348 return ret;
1349 }
1350
1351 static void __exit ib_ucm_cleanup(void)
1352 {
1353 ib_unregister_client(&ucm_client);
1354 class_unregister(&ucm_class);
1355 unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES);
1356 idr_destroy(&ctx_id_table);
1357 }
1358
1359 module_init(ib_ucm_init);
1360 module_exit(ib_ucm_cleanup);
Linux kernel - Deliverables
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