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37#include <linux/module.h>
38#include <linux/init.h>
39#include <linux/device.h>
40#include <linux/err.h>
41#include <linux/fs.h>
42#include <linux/poll.h>
43#include <linux/sched.h>
44#include <linux/file.h>
45#include <linux/cdev.h>
46#include <linux/anon_inodes.h>
47#include <linux/slab.h>
48#include <linux/sched/mm.h>
49
50#include <linux/uaccess.h>
51
52#include <rdma/ib.h>
53#include <rdma/uverbs_std_types.h>
54#include <rdma/rdma_netlink.h>
55
56#include "uverbs.h"
57#include "core_priv.h"
58#include "rdma_core.h"
59
60MODULE_AUTHOR("Roland Dreier");
61MODULE_DESCRIPTION("InfiniBand userspace verbs access");
62MODULE_LICENSE("Dual BSD/GPL");
63
64enum {
65 IB_UVERBS_MAJOR = 231,
66 IB_UVERBS_BASE_MINOR = 192,
67 IB_UVERBS_MAX_DEVICES = RDMA_MAX_PORTS,
68 IB_UVERBS_NUM_FIXED_MINOR = 32,
69 IB_UVERBS_NUM_DYNAMIC_MINOR = IB_UVERBS_MAX_DEVICES - IB_UVERBS_NUM_FIXED_MINOR,
70};
71
72#define IB_UVERBS_BASE_DEV MKDEV(IB_UVERBS_MAJOR, IB_UVERBS_BASE_MINOR)
73
74static dev_t dynamic_uverbs_dev;
75static struct class *uverbs_class;
76
77static DEFINE_IDA(uverbs_ida);
78static void ib_uverbs_add_one(struct ib_device *device);
79static void ib_uverbs_remove_one(struct ib_device *device, void *client_data);
80
81
82
83
84
85struct ib_ucontext *ib_uverbs_get_ucontext_file(struct ib_uverbs_file *ufile)
86{
87
88
89
90
91
92 struct ib_ucontext *ucontext = smp_load_acquire(&ufile->ucontext);
93
94 if (!srcu_dereference(ufile->device->ib_dev,
95 &ufile->device->disassociate_srcu))
96 return ERR_PTR(-EIO);
97
98 if (!ucontext)
99 return ERR_PTR(-EINVAL);
100
101 return ucontext;
102}
103EXPORT_SYMBOL(ib_uverbs_get_ucontext_file);
104
105int uverbs_dealloc_mw(struct ib_mw *mw)
106{
107 struct ib_pd *pd = mw->pd;
108 int ret;
109
110 ret = mw->device->ops.dealloc_mw(mw);
111 if (!ret)
112 atomic_dec(&pd->usecnt);
113 return ret;
114}
115
116static void ib_uverbs_release_dev(struct device *device)
117{
118 struct ib_uverbs_device *dev =
119 container_of(device, struct ib_uverbs_device, dev);
120
121 uverbs_destroy_api(dev->uapi);
122 cleanup_srcu_struct(&dev->disassociate_srcu);
123 kfree(dev);
124}
125
126static void ib_uverbs_release_async_event_file(struct kref *ref)
127{
128 struct ib_uverbs_async_event_file *file =
129 container_of(ref, struct ib_uverbs_async_event_file, ref);
130
131 kfree(file);
132}
133
134void ib_uverbs_release_ucq(struct ib_uverbs_file *file,
135 struct ib_uverbs_completion_event_file *ev_file,
136 struct ib_ucq_object *uobj)
137{
138 struct ib_uverbs_event *evt, *tmp;
139
140 if (ev_file) {
141 spin_lock_irq(&ev_file->ev_queue.lock);
142 list_for_each_entry_safe(evt, tmp, &uobj->comp_list, obj_list) {
143 list_del(&evt->list);
144 kfree(evt);
145 }
146 spin_unlock_irq(&ev_file->ev_queue.lock);
147
148 uverbs_uobject_put(&ev_file->uobj);
149 }
150
151 spin_lock_irq(&file->async_file->ev_queue.lock);
152 list_for_each_entry_safe(evt, tmp, &uobj->async_list, obj_list) {
153 list_del(&evt->list);
154 kfree(evt);
155 }
156 spin_unlock_irq(&file->async_file->ev_queue.lock);
157}
158
159void ib_uverbs_release_uevent(struct ib_uverbs_file *file,
160 struct ib_uevent_object *uobj)
161{
162 struct ib_uverbs_event *evt, *tmp;
163
164 spin_lock_irq(&file->async_file->ev_queue.lock);
165 list_for_each_entry_safe(evt, tmp, &uobj->event_list, obj_list) {
166 list_del(&evt->list);
167 kfree(evt);
168 }
169 spin_unlock_irq(&file->async_file->ev_queue.lock);
170}
171
172void ib_uverbs_detach_umcast(struct ib_qp *qp,
173 struct ib_uqp_object *uobj)
174{
175 struct ib_uverbs_mcast_entry *mcast, *tmp;
176
177 list_for_each_entry_safe(mcast, tmp, &uobj->mcast_list, list) {
178 ib_detach_mcast(qp, &mcast->gid, mcast->lid);
179 list_del(&mcast->list);
180 kfree(mcast);
181 }
182}
183
184static void ib_uverbs_comp_dev(struct ib_uverbs_device *dev)
185{
186 complete(&dev->comp);
187}
188
189void ib_uverbs_release_file(struct kref *ref)
190{
191 struct ib_uverbs_file *file =
192 container_of(ref, struct ib_uverbs_file, ref);
193 struct ib_device *ib_dev;
194 int srcu_key;
195
196 release_ufile_idr_uobject(file);
197
198 srcu_key = srcu_read_lock(&file->device->disassociate_srcu);
199 ib_dev = srcu_dereference(file->device->ib_dev,
200 &file->device->disassociate_srcu);
201 if (ib_dev && !ib_dev->ops.disassociate_ucontext)
202 module_put(ib_dev->ops.owner);
203 srcu_read_unlock(&file->device->disassociate_srcu, srcu_key);
204
205 if (atomic_dec_and_test(&file->device->refcount))
206 ib_uverbs_comp_dev(file->device);
207
208 if (file->async_file)
209 kref_put(&file->async_file->ref,
210 ib_uverbs_release_async_event_file);
211 put_device(&file->device->dev);
212
213 if (file->disassociate_page)
214 __free_pages(file->disassociate_page, 0);
215 kfree(file);
216}
217
218static ssize_t ib_uverbs_event_read(struct ib_uverbs_event_queue *ev_queue,
219 struct ib_uverbs_file *uverbs_file,
220 struct file *filp, char __user *buf,
221 size_t count, loff_t *pos,
222 size_t eventsz)
223{
224 struct ib_uverbs_event *event;
225 int ret = 0;
226
227 spin_lock_irq(&ev_queue->lock);
228
229 while (list_empty(&ev_queue->event_list)) {
230 spin_unlock_irq(&ev_queue->lock);
231
232 if (filp->f_flags & O_NONBLOCK)
233 return -EAGAIN;
234
235 if (wait_event_interruptible(ev_queue->poll_wait,
236 (!list_empty(&ev_queue->event_list) ||
237
238
239
240
241 !uverbs_file->device->ib_dev)))
242 return -ERESTARTSYS;
243
244
245 if (list_empty(&ev_queue->event_list) &&
246 !uverbs_file->device->ib_dev)
247 return -EIO;
248
249 spin_lock_irq(&ev_queue->lock);
250 }
251
252 event = list_entry(ev_queue->event_list.next, struct ib_uverbs_event, list);
253
254 if (eventsz > count) {
255 ret = -EINVAL;
256 event = NULL;
257 } else {
258 list_del(ev_queue->event_list.next);
259 if (event->counter) {
260 ++(*event->counter);
261 list_del(&event->obj_list);
262 }
263 }
264
265 spin_unlock_irq(&ev_queue->lock);
266
267 if (event) {
268 if (copy_to_user(buf, event, eventsz))
269 ret = -EFAULT;
270 else
271 ret = eventsz;
272 }
273
274 kfree(event);
275
276 return ret;
277}
278
279static ssize_t ib_uverbs_async_event_read(struct file *filp, char __user *buf,
280 size_t count, loff_t *pos)
281{
282 struct ib_uverbs_async_event_file *file = filp->private_data;
283
284 return ib_uverbs_event_read(&file->ev_queue, file->uverbs_file, filp,
285 buf, count, pos,
286 sizeof(struct ib_uverbs_async_event_desc));
287}
288
289static ssize_t ib_uverbs_comp_event_read(struct file *filp, char __user *buf,
290 size_t count, loff_t *pos)
291{
292 struct ib_uverbs_completion_event_file *comp_ev_file =
293 filp->private_data;
294
295 return ib_uverbs_event_read(&comp_ev_file->ev_queue,
296 comp_ev_file->uobj.ufile, filp,
297 buf, count, pos,
298 sizeof(struct ib_uverbs_comp_event_desc));
299}
300
301static __poll_t ib_uverbs_event_poll(struct ib_uverbs_event_queue *ev_queue,
302 struct file *filp,
303 struct poll_table_struct *wait)
304{
305 __poll_t pollflags = 0;
306
307 poll_wait(filp, &ev_queue->poll_wait, wait);
308
309 spin_lock_irq(&ev_queue->lock);
310 if (!list_empty(&ev_queue->event_list))
311 pollflags = EPOLLIN | EPOLLRDNORM;
312 spin_unlock_irq(&ev_queue->lock);
313
314 return pollflags;
315}
316
317static __poll_t ib_uverbs_async_event_poll(struct file *filp,
318 struct poll_table_struct *wait)
319{
320 return ib_uverbs_event_poll(filp->private_data, filp, wait);
321}
322
323static __poll_t ib_uverbs_comp_event_poll(struct file *filp,
324 struct poll_table_struct *wait)
325{
326 struct ib_uverbs_completion_event_file *comp_ev_file =
327 filp->private_data;
328
329 return ib_uverbs_event_poll(&comp_ev_file->ev_queue, filp, wait);
330}
331
332static int ib_uverbs_async_event_fasync(int fd, struct file *filp, int on)
333{
334 struct ib_uverbs_event_queue *ev_queue = filp->private_data;
335
336 return fasync_helper(fd, filp, on, &ev_queue->async_queue);
337}
338
339static int ib_uverbs_comp_event_fasync(int fd, struct file *filp, int on)
340{
341 struct ib_uverbs_completion_event_file *comp_ev_file =
342 filp->private_data;
343
344 return fasync_helper(fd, filp, on, &comp_ev_file->ev_queue.async_queue);
345}
346
347static int ib_uverbs_async_event_close(struct inode *inode, struct file *filp)
348{
349 struct ib_uverbs_async_event_file *file = filp->private_data;
350 struct ib_uverbs_file *uverbs_file = file->uverbs_file;
351 struct ib_uverbs_event *entry, *tmp;
352 int closed_already = 0;
353
354 mutex_lock(&uverbs_file->device->lists_mutex);
355 spin_lock_irq(&file->ev_queue.lock);
356 closed_already = file->ev_queue.is_closed;
357 file->ev_queue.is_closed = 1;
358 list_for_each_entry_safe(entry, tmp, &file->ev_queue.event_list, list) {
359 if (entry->counter)
360 list_del(&entry->obj_list);
361 kfree(entry);
362 }
363 spin_unlock_irq(&file->ev_queue.lock);
364 if (!closed_already) {
365 list_del(&file->list);
366 ib_unregister_event_handler(&uverbs_file->event_handler);
367 }
368 mutex_unlock(&uverbs_file->device->lists_mutex);
369
370 kref_put(&uverbs_file->ref, ib_uverbs_release_file);
371 kref_put(&file->ref, ib_uverbs_release_async_event_file);
372
373 return 0;
374}
375
376static int ib_uverbs_comp_event_close(struct inode *inode, struct file *filp)
377{
378 struct ib_uobject *uobj = filp->private_data;
379 struct ib_uverbs_completion_event_file *file = container_of(
380 uobj, struct ib_uverbs_completion_event_file, uobj);
381 struct ib_uverbs_event *entry, *tmp;
382
383 spin_lock_irq(&file->ev_queue.lock);
384 list_for_each_entry_safe(entry, tmp, &file->ev_queue.event_list, list) {
385 if (entry->counter)
386 list_del(&entry->obj_list);
387 kfree(entry);
388 }
389 file->ev_queue.is_closed = 1;
390 spin_unlock_irq(&file->ev_queue.lock);
391
392 uverbs_close_fd(filp);
393
394 return 0;
395}
396
397const struct file_operations uverbs_event_fops = {
398 .owner = THIS_MODULE,
399 .read = ib_uverbs_comp_event_read,
400 .poll = ib_uverbs_comp_event_poll,
401 .release = ib_uverbs_comp_event_close,
402 .fasync = ib_uverbs_comp_event_fasync,
403 .llseek = no_llseek,
404};
405
406static const struct file_operations uverbs_async_event_fops = {
407 .owner = THIS_MODULE,
408 .read = ib_uverbs_async_event_read,
409 .poll = ib_uverbs_async_event_poll,
410 .release = ib_uverbs_async_event_close,
411 .fasync = ib_uverbs_async_event_fasync,
412 .llseek = no_llseek,
413};
414
415void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context)
416{
417 struct ib_uverbs_event_queue *ev_queue = cq_context;
418 struct ib_ucq_object *uobj;
419 struct ib_uverbs_event *entry;
420 unsigned long flags;
421
422 if (!ev_queue)
423 return;
424
425 spin_lock_irqsave(&ev_queue->lock, flags);
426 if (ev_queue->is_closed) {
427 spin_unlock_irqrestore(&ev_queue->lock, flags);
428 return;
429 }
430
431 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
432 if (!entry) {
433 spin_unlock_irqrestore(&ev_queue->lock, flags);
434 return;
435 }
436
437 uobj = container_of(cq->uobject, struct ib_ucq_object, uobject);
438
439 entry->desc.comp.cq_handle = cq->uobject->user_handle;
440 entry->counter = &uobj->comp_events_reported;
441
442 list_add_tail(&entry->list, &ev_queue->event_list);
443 list_add_tail(&entry->obj_list, &uobj->comp_list);
444 spin_unlock_irqrestore(&ev_queue->lock, flags);
445
446 wake_up_interruptible(&ev_queue->poll_wait);
447 kill_fasync(&ev_queue->async_queue, SIGIO, POLL_IN);
448}
449
450static void ib_uverbs_async_handler(struct ib_uverbs_file *file,
451 __u64 element, __u64 event,
452 struct list_head *obj_list,
453 u32 *counter)
454{
455 struct ib_uverbs_event *entry;
456 unsigned long flags;
457
458 spin_lock_irqsave(&file->async_file->ev_queue.lock, flags);
459 if (file->async_file->ev_queue.is_closed) {
460 spin_unlock_irqrestore(&file->async_file->ev_queue.lock, flags);
461 return;
462 }
463
464 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
465 if (!entry) {
466 spin_unlock_irqrestore(&file->async_file->ev_queue.lock, flags);
467 return;
468 }
469
470 entry->desc.async.element = element;
471 entry->desc.async.event_type = event;
472 entry->desc.async.reserved = 0;
473 entry->counter = counter;
474
475 list_add_tail(&entry->list, &file->async_file->ev_queue.event_list);
476 if (obj_list)
477 list_add_tail(&entry->obj_list, obj_list);
478 spin_unlock_irqrestore(&file->async_file->ev_queue.lock, flags);
479
480 wake_up_interruptible(&file->async_file->ev_queue.poll_wait);
481 kill_fasync(&file->async_file->ev_queue.async_queue, SIGIO, POLL_IN);
482}
483
484void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr)
485{
486 struct ib_ucq_object *uobj = container_of(event->element.cq->uobject,
487 struct ib_ucq_object, uobject);
488
489 ib_uverbs_async_handler(uobj->uobject.ufile, uobj->uobject.user_handle,
490 event->event, &uobj->async_list,
491 &uobj->async_events_reported);
492}
493
494void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr)
495{
496 struct ib_uevent_object *uobj;
497
498
499 if (!event->element.qp->uobject)
500 return;
501
502 uobj = container_of(event->element.qp->uobject,
503 struct ib_uevent_object, uobject);
504
505 ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle,
506 event->event, &uobj->event_list,
507 &uobj->events_reported);
508}
509
510void ib_uverbs_wq_event_handler(struct ib_event *event, void *context_ptr)
511{
512 struct ib_uevent_object *uobj = container_of(event->element.wq->uobject,
513 struct ib_uevent_object, uobject);
514
515 ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle,
516 event->event, &uobj->event_list,
517 &uobj->events_reported);
518}
519
520void ib_uverbs_srq_event_handler(struct ib_event *event, void *context_ptr)
521{
522 struct ib_uevent_object *uobj;
523
524 uobj = container_of(event->element.srq->uobject,
525 struct ib_uevent_object, uobject);
526
527 ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle,
528 event->event, &uobj->event_list,
529 &uobj->events_reported);
530}
531
532void ib_uverbs_event_handler(struct ib_event_handler *handler,
533 struct ib_event *event)
534{
535 struct ib_uverbs_file *file =
536 container_of(handler, struct ib_uverbs_file, event_handler);
537
538 ib_uverbs_async_handler(file, event->element.port_num, event->event,
539 NULL, NULL);
540}
541
542void ib_uverbs_free_async_event_file(struct ib_uverbs_file *file)
543{
544 kref_put(&file->async_file->ref, ib_uverbs_release_async_event_file);
545 file->async_file = NULL;
546}
547
548void ib_uverbs_init_event_queue(struct ib_uverbs_event_queue *ev_queue)
549{
550 spin_lock_init(&ev_queue->lock);
551 INIT_LIST_HEAD(&ev_queue->event_list);
552 init_waitqueue_head(&ev_queue->poll_wait);
553 ev_queue->is_closed = 0;
554 ev_queue->async_queue = NULL;
555}
556
557struct file *ib_uverbs_alloc_async_event_file(struct ib_uverbs_file *uverbs_file,
558 struct ib_device *ib_dev)
559{
560 struct ib_uverbs_async_event_file *ev_file;
561 struct file *filp;
562
563 ev_file = kzalloc(sizeof(*ev_file), GFP_KERNEL);
564 if (!ev_file)
565 return ERR_PTR(-ENOMEM);
566
567 ib_uverbs_init_event_queue(&ev_file->ev_queue);
568 ev_file->uverbs_file = uverbs_file;
569 kref_get(&ev_file->uverbs_file->ref);
570 kref_init(&ev_file->ref);
571 filp = anon_inode_getfile("[infinibandevent]", &uverbs_async_event_fops,
572 ev_file, O_RDONLY);
573 if (IS_ERR(filp))
574 goto err_put_refs;
575
576 mutex_lock(&uverbs_file->device->lists_mutex);
577 list_add_tail(&ev_file->list,
578 &uverbs_file->device->uverbs_events_file_list);
579 mutex_unlock(&uverbs_file->device->lists_mutex);
580
581 WARN_ON(uverbs_file->async_file);
582 uverbs_file->async_file = ev_file;
583 kref_get(&uverbs_file->async_file->ref);
584 INIT_IB_EVENT_HANDLER(&uverbs_file->event_handler,
585 ib_dev,
586 ib_uverbs_event_handler);
587 ib_register_event_handler(&uverbs_file->event_handler);
588
589
590 return filp;
591
592err_put_refs:
593 kref_put(&ev_file->uverbs_file->ref, ib_uverbs_release_file);
594 kref_put(&ev_file->ref, ib_uverbs_release_async_event_file);
595 return filp;
596}
597
598static ssize_t verify_hdr(struct ib_uverbs_cmd_hdr *hdr,
599 struct ib_uverbs_ex_cmd_hdr *ex_hdr, size_t count,
600 const struct uverbs_api_write_method *method_elm)
601{
602 if (method_elm->is_ex) {
603 count -= sizeof(*hdr) + sizeof(*ex_hdr);
604
605 if ((hdr->in_words + ex_hdr->provider_in_words) * 8 != count)
606 return -EINVAL;
607
608 if (hdr->in_words * 8 < method_elm->req_size)
609 return -ENOSPC;
610
611 if (ex_hdr->cmd_hdr_reserved)
612 return -EINVAL;
613
614 if (ex_hdr->response) {
615 if (!hdr->out_words && !ex_hdr->provider_out_words)
616 return -EINVAL;
617
618 if (hdr->out_words * 8 < method_elm->resp_size)
619 return -ENOSPC;
620
621 if (!access_ok(u64_to_user_ptr(ex_hdr->response),
622 (hdr->out_words + ex_hdr->provider_out_words) * 8))
623 return -EFAULT;
624 } else {
625 if (hdr->out_words || ex_hdr->provider_out_words)
626 return -EINVAL;
627 }
628
629 return 0;
630 }
631
632
633 if (hdr->in_words * 4 != count)
634 return -EINVAL;
635
636 if (count < method_elm->req_size + sizeof(hdr)) {
637
638
639
640
641
642
643
644 if (hdr->command == IB_USER_VERBS_CMD_DESTROY_CQ &&
645 count == 16) {
646 hdr->in_words = 6;
647 return 0;
648 }
649 return -ENOSPC;
650 }
651 if (hdr->out_words * 4 < method_elm->resp_size)
652 return -ENOSPC;
653
654 return 0;
655}
656
657static ssize_t ib_uverbs_write(struct file *filp, const char __user *buf,
658 size_t count, loff_t *pos)
659{
660 struct ib_uverbs_file *file = filp->private_data;
661 const struct uverbs_api_write_method *method_elm;
662 struct uverbs_api *uapi = file->device->uapi;
663 struct ib_uverbs_ex_cmd_hdr ex_hdr;
664 struct ib_uverbs_cmd_hdr hdr;
665 struct uverbs_attr_bundle bundle;
666 int srcu_key;
667 ssize_t ret;
668
669 if (!ib_safe_file_access(filp)) {
670 pr_err_once("uverbs_write: process %d (%s) changed security contexts after opening file descriptor, this is not allowed.\n",
671 task_tgid_vnr(current), current->comm);
672 return -EACCES;
673 }
674
675 if (count < sizeof(hdr))
676 return -EINVAL;
677
678 if (copy_from_user(&hdr, buf, sizeof(hdr)))
679 return -EFAULT;
680
681 method_elm = uapi_get_method(uapi, hdr.command);
682 if (IS_ERR(method_elm))
683 return PTR_ERR(method_elm);
684
685 if (method_elm->is_ex) {
686 if (count < (sizeof(hdr) + sizeof(ex_hdr)))
687 return -EINVAL;
688 if (copy_from_user(&ex_hdr, buf + sizeof(hdr), sizeof(ex_hdr)))
689 return -EFAULT;
690 }
691
692 ret = verify_hdr(&hdr, &ex_hdr, count, method_elm);
693 if (ret)
694 return ret;
695
696 srcu_key = srcu_read_lock(&file->device->disassociate_srcu);
697
698 buf += sizeof(hdr);
699
700 memset(bundle.attr_present, 0, sizeof(bundle.attr_present));
701 bundle.ufile = file;
702 bundle.context = NULL;
703 if (!method_elm->is_ex) {
704 size_t in_len = hdr.in_words * 4 - sizeof(hdr);
705 size_t out_len = hdr.out_words * 4;
706 u64 response = 0;
707
708 if (method_elm->has_udata) {
709 bundle.driver_udata.inlen =
710 in_len - method_elm->req_size;
711 in_len = method_elm->req_size;
712 if (bundle.driver_udata.inlen)
713 bundle.driver_udata.inbuf = buf + in_len;
714 else
715 bundle.driver_udata.inbuf = NULL;
716 } else {
717 memset(&bundle.driver_udata, 0,
718 sizeof(bundle.driver_udata));
719 }
720
721 if (method_elm->has_resp) {
722
723
724
725
726
727 ret = get_user(response, (const u64 __user *)buf);
728 if (ret)
729 goto out_unlock;
730
731 if (method_elm->has_udata) {
732 bundle.driver_udata.outlen =
733 out_len - method_elm->resp_size;
734 out_len = method_elm->resp_size;
735 if (bundle.driver_udata.outlen)
736 bundle.driver_udata.outbuf =
737 u64_to_user_ptr(response +
738 out_len);
739 else
740 bundle.driver_udata.outbuf = NULL;
741 }
742 } else {
743 bundle.driver_udata.outlen = 0;
744 bundle.driver_udata.outbuf = NULL;
745 }
746
747 ib_uverbs_init_udata_buf_or_null(
748 &bundle.ucore, buf, u64_to_user_ptr(response),
749 in_len, out_len);
750 } else {
751 buf += sizeof(ex_hdr);
752
753 ib_uverbs_init_udata_buf_or_null(&bundle.ucore, buf,
754 u64_to_user_ptr(ex_hdr.response),
755 hdr.in_words * 8, hdr.out_words * 8);
756
757 ib_uverbs_init_udata_buf_or_null(
758 &bundle.driver_udata, buf + bundle.ucore.inlen,
759 u64_to_user_ptr(ex_hdr.response) + bundle.ucore.outlen,
760 ex_hdr.provider_in_words * 8,
761 ex_hdr.provider_out_words * 8);
762
763 }
764
765 ret = method_elm->handler(&bundle);
766out_unlock:
767 srcu_read_unlock(&file->device->disassociate_srcu, srcu_key);
768 return (ret) ? : count;
769}
770
771static int ib_uverbs_mmap(struct file *filp, struct vm_area_struct *vma)
772{
773 struct ib_uverbs_file *file = filp->private_data;
774 struct ib_ucontext *ucontext;
775 int ret = 0;
776 int srcu_key;
777
778 srcu_key = srcu_read_lock(&file->device->disassociate_srcu);
779 ucontext = ib_uverbs_get_ucontext_file(file);
780 if (IS_ERR(ucontext)) {
781 ret = PTR_ERR(ucontext);
782 goto out;
783 }
784
785 ret = ucontext->device->ops.mmap(ucontext, vma);
786out:
787 srcu_read_unlock(&file->device->disassociate_srcu, srcu_key);
788 return ret;
789}
790
791
792
793
794
795
796
797
798
799
800
801
802struct rdma_umap_priv {
803 struct vm_area_struct *vma;
804 struct list_head list;
805};
806
807static const struct vm_operations_struct rdma_umap_ops;
808
809static void rdma_umap_priv_init(struct rdma_umap_priv *priv,
810 struct vm_area_struct *vma)
811{
812 struct ib_uverbs_file *ufile = vma->vm_file->private_data;
813
814 priv->vma = vma;
815 vma->vm_private_data = priv;
816 vma->vm_ops = &rdma_umap_ops;
817
818 mutex_lock(&ufile->umap_lock);
819 list_add(&priv->list, &ufile->umaps);
820 mutex_unlock(&ufile->umap_lock);
821}
822
823
824
825
826
827static void rdma_umap_open(struct vm_area_struct *vma)
828{
829 struct ib_uverbs_file *ufile = vma->vm_file->private_data;
830 struct rdma_umap_priv *opriv = vma->vm_private_data;
831 struct rdma_umap_priv *priv;
832
833 if (!opriv)
834 return;
835
836
837 if (!down_read_trylock(&ufile->hw_destroy_rwsem))
838 goto out_zap;
839
840
841
842 if (!ufile->ucontext)
843 goto out_unlock;
844
845 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
846 if (!priv)
847 goto out_unlock;
848 rdma_umap_priv_init(priv, vma);
849
850 up_read(&ufile->hw_destroy_rwsem);
851 return;
852
853out_unlock:
854 up_read(&ufile->hw_destroy_rwsem);
855out_zap:
856
857
858
859
860
861 vma->vm_private_data = NULL;
862 zap_vma_ptes(vma, vma->vm_start, vma->vm_end - vma->vm_start);
863}
864
865static void rdma_umap_close(struct vm_area_struct *vma)
866{
867 struct ib_uverbs_file *ufile = vma->vm_file->private_data;
868 struct rdma_umap_priv *priv = vma->vm_private_data;
869
870 if (!priv)
871 return;
872
873
874
875
876
877
878 mutex_lock(&ufile->umap_lock);
879 list_del(&priv->list);
880 mutex_unlock(&ufile->umap_lock);
881 kfree(priv);
882}
883
884
885
886
887
888static vm_fault_t rdma_umap_fault(struct vm_fault *vmf)
889{
890 struct ib_uverbs_file *ufile = vmf->vma->vm_file->private_data;
891 struct rdma_umap_priv *priv = vmf->vma->vm_private_data;
892 vm_fault_t ret = 0;
893
894 if (!priv)
895 return VM_FAULT_SIGBUS;
896
897
898 if (!(vmf->vma->vm_flags & (VM_WRITE | VM_MAYWRITE))) {
899 vmf->page = ZERO_PAGE(vmf->address);
900 get_page(vmf->page);
901 return 0;
902 }
903
904 mutex_lock(&ufile->umap_lock);
905 if (!ufile->disassociate_page)
906 ufile->disassociate_page =
907 alloc_pages(vmf->gfp_mask | __GFP_ZERO, 0);
908
909 if (ufile->disassociate_page) {
910
911
912
913
914 vmf->page = ufile->disassociate_page;
915 get_page(vmf->page);
916 } else {
917 ret = VM_FAULT_SIGBUS;
918 }
919 mutex_unlock(&ufile->umap_lock);
920
921 return ret;
922}
923
924static const struct vm_operations_struct rdma_umap_ops = {
925 .open = rdma_umap_open,
926 .close = rdma_umap_close,
927 .fault = rdma_umap_fault,
928};
929
930
931
932
933
934
935int rdma_user_mmap_io(struct ib_ucontext *ucontext, struct vm_area_struct *vma,
936 unsigned long pfn, unsigned long size, pgprot_t prot)
937{
938 struct ib_uverbs_file *ufile = ucontext->ufile;
939 struct rdma_umap_priv *priv;
940
941 if (!(vma->vm_flags & VM_SHARED))
942 return -EINVAL;
943
944 if (vma->vm_end - vma->vm_start != size)
945 return -EINVAL;
946
947
948 if (WARN_ON(!vma->vm_file ||
949 vma->vm_file->private_data != ufile))
950 return -EINVAL;
951 lockdep_assert_held(&ufile->device->disassociate_srcu);
952
953 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
954 if (!priv)
955 return -ENOMEM;
956
957 vma->vm_page_prot = prot;
958 if (io_remap_pfn_range(vma, vma->vm_start, pfn, size, prot)) {
959 kfree(priv);
960 return -EAGAIN;
961 }
962
963 rdma_umap_priv_init(priv, vma);
964 return 0;
965}
966EXPORT_SYMBOL(rdma_user_mmap_io);
967
968void uverbs_user_mmap_disassociate(struct ib_uverbs_file *ufile)
969{
970 struct rdma_umap_priv *priv, *next_priv;
971
972 lockdep_assert_held(&ufile->hw_destroy_rwsem);
973
974 while (1) {
975 struct mm_struct *mm = NULL;
976
977
978 mutex_lock(&ufile->umap_lock);
979 while (!list_empty(&ufile->umaps)) {
980 int ret;
981
982 priv = list_first_entry(&ufile->umaps,
983 struct rdma_umap_priv, list);
984 mm = priv->vma->vm_mm;
985 ret = mmget_not_zero(mm);
986 if (!ret) {
987 list_del_init(&priv->list);
988 mm = NULL;
989 continue;
990 }
991 break;
992 }
993 mutex_unlock(&ufile->umap_lock);
994 if (!mm)
995 return;
996
997
998
999
1000
1001
1002
1003 down_read(&mm->mmap_sem);
1004 if (!mmget_still_valid(mm))
1005 goto skip_mm;
1006 mutex_lock(&ufile->umap_lock);
1007 list_for_each_entry_safe (priv, next_priv, &ufile->umaps,
1008 list) {
1009 struct vm_area_struct *vma = priv->vma;
1010
1011 if (vma->vm_mm != mm)
1012 continue;
1013 list_del_init(&priv->list);
1014
1015 zap_vma_ptes(vma, vma->vm_start,
1016 vma->vm_end - vma->vm_start);
1017 }
1018 mutex_unlock(&ufile->umap_lock);
1019 skip_mm:
1020 up_read(&mm->mmap_sem);
1021 mmput(mm);
1022 }
1023}
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035static int ib_uverbs_open(struct inode *inode, struct file *filp)
1036{
1037 struct ib_uverbs_device *dev;
1038 struct ib_uverbs_file *file;
1039 struct ib_device *ib_dev;
1040 int ret;
1041 int module_dependent;
1042 int srcu_key;
1043
1044 dev = container_of(inode->i_cdev, struct ib_uverbs_device, cdev);
1045 if (!atomic_inc_not_zero(&dev->refcount))
1046 return -ENXIO;
1047
1048 get_device(&dev->dev);
1049 srcu_key = srcu_read_lock(&dev->disassociate_srcu);
1050 mutex_lock(&dev->lists_mutex);
1051 ib_dev = srcu_dereference(dev->ib_dev,
1052 &dev->disassociate_srcu);
1053 if (!ib_dev) {
1054 ret = -EIO;
1055 goto err;
1056 }
1057
1058 if (!rdma_dev_access_netns(ib_dev, current->nsproxy->net_ns)) {
1059 ret = -EPERM;
1060 goto err;
1061 }
1062
1063
1064
1065
1066 module_dependent = !(ib_dev->ops.disassociate_ucontext);
1067
1068 if (module_dependent) {
1069 if (!try_module_get(ib_dev->ops.owner)) {
1070 ret = -ENODEV;
1071 goto err;
1072 }
1073 }
1074
1075 file = kzalloc(sizeof(*file), GFP_KERNEL);
1076 if (!file) {
1077 ret = -ENOMEM;
1078 if (module_dependent)
1079 goto err_module;
1080
1081 goto err;
1082 }
1083
1084 file->device = dev;
1085 kref_init(&file->ref);
1086 mutex_init(&file->ucontext_lock);
1087
1088 spin_lock_init(&file->uobjects_lock);
1089 INIT_LIST_HEAD(&file->uobjects);
1090 init_rwsem(&file->hw_destroy_rwsem);
1091 mutex_init(&file->umap_lock);
1092 INIT_LIST_HEAD(&file->umaps);
1093
1094 filp->private_data = file;
1095 list_add_tail(&file->list, &dev->uverbs_file_list);
1096 mutex_unlock(&dev->lists_mutex);
1097 srcu_read_unlock(&dev->disassociate_srcu, srcu_key);
1098
1099 setup_ufile_idr_uobject(file);
1100
1101 return stream_open(inode, filp);
1102
1103err_module:
1104 module_put(ib_dev->ops.owner);
1105
1106err:
1107 mutex_unlock(&dev->lists_mutex);
1108 srcu_read_unlock(&dev->disassociate_srcu, srcu_key);
1109 if (atomic_dec_and_test(&dev->refcount))
1110 ib_uverbs_comp_dev(dev);
1111
1112 put_device(&dev->dev);
1113 return ret;
1114}
1115
1116static int ib_uverbs_close(struct inode *inode, struct file *filp)
1117{
1118 struct ib_uverbs_file *file = filp->private_data;
1119
1120 uverbs_destroy_ufile_hw(file, RDMA_REMOVE_CLOSE);
1121
1122 mutex_lock(&file->device->lists_mutex);
1123 list_del_init(&file->list);
1124 mutex_unlock(&file->device->lists_mutex);
1125
1126 kref_put(&file->ref, ib_uverbs_release_file);
1127
1128 return 0;
1129}
1130
1131static const struct file_operations uverbs_fops = {
1132 .owner = THIS_MODULE,
1133 .write = ib_uverbs_write,
1134 .open = ib_uverbs_open,
1135 .release = ib_uverbs_close,
1136 .llseek = no_llseek,
1137 .unlocked_ioctl = ib_uverbs_ioctl,
1138 .compat_ioctl = ib_uverbs_ioctl,
1139};
1140
1141static const struct file_operations uverbs_mmap_fops = {
1142 .owner = THIS_MODULE,
1143 .write = ib_uverbs_write,
1144 .mmap = ib_uverbs_mmap,
1145 .open = ib_uverbs_open,
1146 .release = ib_uverbs_close,
1147 .llseek = no_llseek,
1148 .unlocked_ioctl = ib_uverbs_ioctl,
1149 .compat_ioctl = ib_uverbs_ioctl,
1150};
1151
1152static int ib_uverbs_get_nl_info(struct ib_device *ibdev, void *client_data,
1153 struct ib_client_nl_info *res)
1154{
1155 struct ib_uverbs_device *uverbs_dev = client_data;
1156 int ret;
1157
1158 if (res->port != -1)
1159 return -EINVAL;
1160
1161 res->abi = ibdev->ops.uverbs_abi_ver;
1162 res->cdev = &uverbs_dev->dev;
1163
1164
1165
1166
1167
1168
1169
1170 if (!ibdev->ops.uverbs_no_driver_id_binding) {
1171 ret = nla_put_u32(res->nl_msg, RDMA_NLDEV_ATTR_UVERBS_DRIVER_ID,
1172 ibdev->ops.driver_id);
1173 if (ret)
1174 return ret;
1175 }
1176 return 0;
1177}
1178
1179static struct ib_client uverbs_client = {
1180 .name = "uverbs",
1181 .no_kverbs_req = true,
1182 .add = ib_uverbs_add_one,
1183 .remove = ib_uverbs_remove_one,
1184 .get_nl_info = ib_uverbs_get_nl_info,
1185};
1186MODULE_ALIAS_RDMA_CLIENT("uverbs");
1187
1188static ssize_t ibdev_show(struct device *device, struct device_attribute *attr,
1189 char *buf)
1190{
1191 struct ib_uverbs_device *dev =
1192 container_of(device, struct ib_uverbs_device, dev);
1193 int ret = -ENODEV;
1194 int srcu_key;
1195 struct ib_device *ib_dev;
1196
1197 srcu_key = srcu_read_lock(&dev->disassociate_srcu);
1198 ib_dev = srcu_dereference(dev->ib_dev, &dev->disassociate_srcu);
1199 if (ib_dev)
1200 ret = sprintf(buf, "%s\n", dev_name(&ib_dev->dev));
1201 srcu_read_unlock(&dev->disassociate_srcu, srcu_key);
1202
1203 return ret;
1204}
1205static DEVICE_ATTR_RO(ibdev);
1206
1207static ssize_t abi_version_show(struct device *device,
1208 struct device_attribute *attr, char *buf)
1209{
1210 struct ib_uverbs_device *dev =
1211 container_of(device, struct ib_uverbs_device, dev);
1212 int ret = -ENODEV;
1213 int srcu_key;
1214 struct ib_device *ib_dev;
1215
1216 srcu_key = srcu_read_lock(&dev->disassociate_srcu);
1217 ib_dev = srcu_dereference(dev->ib_dev, &dev->disassociate_srcu);
1218 if (ib_dev)
1219 ret = sprintf(buf, "%u\n", ib_dev->ops.uverbs_abi_ver);
1220 srcu_read_unlock(&dev->disassociate_srcu, srcu_key);
1221
1222 return ret;
1223}
1224static DEVICE_ATTR_RO(abi_version);
1225
1226static struct attribute *ib_dev_attrs[] = {
1227 &dev_attr_abi_version.attr,
1228 &dev_attr_ibdev.attr,
1229 NULL,
1230};
1231
1232static const struct attribute_group dev_attr_group = {
1233 .attrs = ib_dev_attrs,
1234};
1235
1236static CLASS_ATTR_STRING(abi_version, S_IRUGO,
1237 __stringify(IB_USER_VERBS_ABI_VERSION));
1238
1239static int ib_uverbs_create_uapi(struct ib_device *device,
1240 struct ib_uverbs_device *uverbs_dev)
1241{
1242 struct uverbs_api *uapi;
1243
1244 uapi = uverbs_alloc_api(device);
1245 if (IS_ERR(uapi))
1246 return PTR_ERR(uapi);
1247
1248 uverbs_dev->uapi = uapi;
1249 return 0;
1250}
1251
1252static void ib_uverbs_add_one(struct ib_device *device)
1253{
1254 int devnum;
1255 dev_t base;
1256 struct ib_uverbs_device *uverbs_dev;
1257 int ret;
1258
1259 if (!device->ops.alloc_ucontext)
1260 return;
1261
1262 uverbs_dev = kzalloc(sizeof(*uverbs_dev), GFP_KERNEL);
1263 if (!uverbs_dev)
1264 return;
1265
1266 ret = init_srcu_struct(&uverbs_dev->disassociate_srcu);
1267 if (ret) {
1268 kfree(uverbs_dev);
1269 return;
1270 }
1271
1272 device_initialize(&uverbs_dev->dev);
1273 uverbs_dev->dev.class = uverbs_class;
1274 uverbs_dev->dev.parent = device->dev.parent;
1275 uverbs_dev->dev.release = ib_uverbs_release_dev;
1276 uverbs_dev->groups[0] = &dev_attr_group;
1277 uverbs_dev->dev.groups = uverbs_dev->groups;
1278 atomic_set(&uverbs_dev->refcount, 1);
1279 init_completion(&uverbs_dev->comp);
1280 uverbs_dev->xrcd_tree = RB_ROOT;
1281 mutex_init(&uverbs_dev->xrcd_tree_mutex);
1282 mutex_init(&uverbs_dev->lists_mutex);
1283 INIT_LIST_HEAD(&uverbs_dev->uverbs_file_list);
1284 INIT_LIST_HEAD(&uverbs_dev->uverbs_events_file_list);
1285 rcu_assign_pointer(uverbs_dev->ib_dev, device);
1286 uverbs_dev->num_comp_vectors = device->num_comp_vectors;
1287
1288 devnum = ida_alloc_max(&uverbs_ida, IB_UVERBS_MAX_DEVICES - 1,
1289 GFP_KERNEL);
1290 if (devnum < 0)
1291 goto err;
1292 uverbs_dev->devnum = devnum;
1293 if (devnum >= IB_UVERBS_NUM_FIXED_MINOR)
1294 base = dynamic_uverbs_dev + devnum - IB_UVERBS_NUM_FIXED_MINOR;
1295 else
1296 base = IB_UVERBS_BASE_DEV + devnum;
1297
1298 if (ib_uverbs_create_uapi(device, uverbs_dev))
1299 goto err_uapi;
1300
1301 uverbs_dev->dev.devt = base;
1302 dev_set_name(&uverbs_dev->dev, "uverbs%d", uverbs_dev->devnum);
1303
1304 cdev_init(&uverbs_dev->cdev,
1305 device->ops.mmap ? &uverbs_mmap_fops : &uverbs_fops);
1306 uverbs_dev->cdev.owner = THIS_MODULE;
1307
1308 ret = cdev_device_add(&uverbs_dev->cdev, &uverbs_dev->dev);
1309 if (ret)
1310 goto err_uapi;
1311
1312 ib_set_client_data(device, &uverbs_client, uverbs_dev);
1313 return;
1314
1315err_uapi:
1316 ida_free(&uverbs_ida, devnum);
1317err:
1318 if (atomic_dec_and_test(&uverbs_dev->refcount))
1319 ib_uverbs_comp_dev(uverbs_dev);
1320 wait_for_completion(&uverbs_dev->comp);
1321 put_device(&uverbs_dev->dev);
1322 return;
1323}
1324
1325static void ib_uverbs_free_hw_resources(struct ib_uverbs_device *uverbs_dev,
1326 struct ib_device *ib_dev)
1327{
1328 struct ib_uverbs_file *file;
1329 struct ib_uverbs_async_event_file *event_file;
1330 struct ib_event event;
1331
1332
1333 uverbs_disassociate_api_pre(uverbs_dev);
1334 event.event = IB_EVENT_DEVICE_FATAL;
1335 event.element.port_num = 0;
1336 event.device = ib_dev;
1337
1338 mutex_lock(&uverbs_dev->lists_mutex);
1339 while (!list_empty(&uverbs_dev->uverbs_file_list)) {
1340 file = list_first_entry(&uverbs_dev->uverbs_file_list,
1341 struct ib_uverbs_file, list);
1342 list_del_init(&file->list);
1343 kref_get(&file->ref);
1344
1345
1346
1347
1348
1349
1350 mutex_unlock(&uverbs_dev->lists_mutex);
1351
1352 ib_uverbs_event_handler(&file->event_handler, &event);
1353 uverbs_destroy_ufile_hw(file, RDMA_REMOVE_DRIVER_REMOVE);
1354 kref_put(&file->ref, ib_uverbs_release_file);
1355
1356 mutex_lock(&uverbs_dev->lists_mutex);
1357 }
1358
1359 while (!list_empty(&uverbs_dev->uverbs_events_file_list)) {
1360 event_file = list_first_entry(&uverbs_dev->
1361 uverbs_events_file_list,
1362 struct ib_uverbs_async_event_file,
1363 list);
1364 spin_lock_irq(&event_file->ev_queue.lock);
1365 event_file->ev_queue.is_closed = 1;
1366 spin_unlock_irq(&event_file->ev_queue.lock);
1367
1368 list_del(&event_file->list);
1369 ib_unregister_event_handler(
1370 &event_file->uverbs_file->event_handler);
1371 event_file->uverbs_file->event_handler.device =
1372 NULL;
1373
1374 wake_up_interruptible(&event_file->ev_queue.poll_wait);
1375 kill_fasync(&event_file->ev_queue.async_queue, SIGIO, POLL_IN);
1376 }
1377 mutex_unlock(&uverbs_dev->lists_mutex);
1378
1379 uverbs_disassociate_api(uverbs_dev->uapi);
1380}
1381
1382static void ib_uverbs_remove_one(struct ib_device *device, void *client_data)
1383{
1384 struct ib_uverbs_device *uverbs_dev = client_data;
1385 int wait_clients = 1;
1386
1387 if (!uverbs_dev)
1388 return;
1389
1390 cdev_device_del(&uverbs_dev->cdev, &uverbs_dev->dev);
1391 ida_free(&uverbs_ida, uverbs_dev->devnum);
1392
1393 if (device->ops.disassociate_ucontext) {
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405 ib_uverbs_free_hw_resources(uverbs_dev, device);
1406 wait_clients = 0;
1407 }
1408
1409 if (atomic_dec_and_test(&uverbs_dev->refcount))
1410 ib_uverbs_comp_dev(uverbs_dev);
1411 if (wait_clients)
1412 wait_for_completion(&uverbs_dev->comp);
1413
1414 put_device(&uverbs_dev->dev);
1415}
1416
1417static char *uverbs_devnode(struct device *dev, umode_t *mode)
1418{
1419 if (mode)
1420 *mode = 0666;
1421 return kasprintf(GFP_KERNEL, "infiniband/%s", dev_name(dev));
1422}
1423
1424static int __init ib_uverbs_init(void)
1425{
1426 int ret;
1427
1428 ret = register_chrdev_region(IB_UVERBS_BASE_DEV,
1429 IB_UVERBS_NUM_FIXED_MINOR,
1430 "infiniband_verbs");
1431 if (ret) {
1432 pr_err("user_verbs: couldn't register device number\n");
1433 goto out;
1434 }
1435
1436 ret = alloc_chrdev_region(&dynamic_uverbs_dev, 0,
1437 IB_UVERBS_NUM_DYNAMIC_MINOR,
1438 "infiniband_verbs");
1439 if (ret) {
1440 pr_err("couldn't register dynamic device number\n");
1441 goto out_alloc;
1442 }
1443
1444 uverbs_class = class_create(THIS_MODULE, "infiniband_verbs");
1445 if (IS_ERR(uverbs_class)) {
1446 ret = PTR_ERR(uverbs_class);
1447 pr_err("user_verbs: couldn't create class infiniband_verbs\n");
1448 goto out_chrdev;
1449 }
1450
1451 uverbs_class->devnode = uverbs_devnode;
1452
1453 ret = class_create_file(uverbs_class, &class_attr_abi_version.attr);
1454 if (ret) {
1455 pr_err("user_verbs: couldn't create abi_version attribute\n");
1456 goto out_class;
1457 }
1458
1459 ret = ib_register_client(&uverbs_client);
1460 if (ret) {
1461 pr_err("user_verbs: couldn't register client\n");
1462 goto out_class;
1463 }
1464
1465 return 0;
1466
1467out_class:
1468 class_destroy(uverbs_class);
1469
1470out_chrdev:
1471 unregister_chrdev_region(dynamic_uverbs_dev,
1472 IB_UVERBS_NUM_DYNAMIC_MINOR);
1473
1474out_alloc:
1475 unregister_chrdev_region(IB_UVERBS_BASE_DEV,
1476 IB_UVERBS_NUM_FIXED_MINOR);
1477
1478out:
1479 return ret;
1480}
1481
1482static void __exit ib_uverbs_cleanup(void)
1483{
1484 ib_unregister_client(&uverbs_client);
1485 class_destroy(uverbs_class);
1486 unregister_chrdev_region(IB_UVERBS_BASE_DEV,
1487 IB_UVERBS_NUM_FIXED_MINOR);
1488 unregister_chrdev_region(dynamic_uverbs_dev,
1489 IB_UVERBS_NUM_DYNAMIC_MINOR);
1490}
1491
1492module_init(ib_uverbs_init);
1493module_exit(ib_uverbs_cleanup);
1494