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33#include <linux/file.h>
34#include <linux/anon_inodes.h>
35#include <linux/sched/mm.h>
36#include <rdma/ib_verbs.h>
37#include <rdma/uverbs_types.h>
38#include <linux/rcupdate.h>
39#include <rdma/uverbs_ioctl.h>
40#include <rdma/rdma_user_ioctl.h>
41#include "uverbs.h"
42#include "core_priv.h"
43#include "rdma_core.h"
44
45static void uverbs_uobject_free(struct kref *ref)
46{
47 kfree_rcu(container_of(ref, struct ib_uobject, ref), rcu);
48}
49
50
51
52
53
54
55void uverbs_uobject_put(struct ib_uobject *uobject)
56{
57 kref_put(&uobject->ref, uverbs_uobject_free);
58}
59EXPORT_SYMBOL(uverbs_uobject_put);
60
61static int uverbs_try_lock_object(struct ib_uobject *uobj,
62 enum rdma_lookup_mode mode)
63{
64
65
66
67
68
69
70
71
72
73
74
75 switch (mode) {
76 case UVERBS_LOOKUP_READ:
77 return atomic_fetch_add_unless(&uobj->usecnt, 1, -1) == -1 ?
78 -EBUSY : 0;
79 case UVERBS_LOOKUP_WRITE:
80
81 return atomic_cmpxchg(&uobj->usecnt, 0, -1) == 0 ? 0 : -EBUSY;
82 case UVERBS_LOOKUP_DESTROY:
83 return 0;
84 }
85 return 0;
86}
87
88static void assert_uverbs_usecnt(struct ib_uobject *uobj,
89 enum rdma_lookup_mode mode)
90{
91#ifdef CONFIG_LOCKDEP
92 switch (mode) {
93 case UVERBS_LOOKUP_READ:
94 WARN_ON(atomic_read(&uobj->usecnt) <= 0);
95 break;
96 case UVERBS_LOOKUP_WRITE:
97 WARN_ON(atomic_read(&uobj->usecnt) != -1);
98 break;
99 case UVERBS_LOOKUP_DESTROY:
100 break;
101 }
102#endif
103}
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122static int uverbs_destroy_uobject(struct ib_uobject *uobj,
123 enum rdma_remove_reason reason,
124 struct uverbs_attr_bundle *attrs)
125{
126 struct ib_uverbs_file *ufile = attrs->ufile;
127 unsigned long flags;
128 int ret;
129
130 lockdep_assert_held(&ufile->hw_destroy_rwsem);
131 assert_uverbs_usecnt(uobj, UVERBS_LOOKUP_WRITE);
132
133 if (reason == RDMA_REMOVE_ABORT) {
134 WARN_ON(!list_empty(&uobj->list));
135 WARN_ON(!uobj->context);
136 uobj->uapi_object->type_class->alloc_abort(uobj);
137 } else if (uobj->object) {
138 ret = uobj->uapi_object->type_class->destroy_hw(uobj, reason,
139 attrs);
140 if (ret)
141
142 return ret;
143
144 uobj->object = NULL;
145 }
146
147 uobj->context = NULL;
148
149
150
151
152
153
154 if (reason != RDMA_REMOVE_DESTROY)
155 atomic_set(&uobj->usecnt, 0);
156 else
157 uobj->uapi_object->type_class->remove_handle(uobj);
158
159 if (!list_empty(&uobj->list)) {
160 spin_lock_irqsave(&ufile->uobjects_lock, flags);
161 list_del_init(&uobj->list);
162 spin_unlock_irqrestore(&ufile->uobjects_lock, flags);
163
164
165
166
167
168 uverbs_uobject_put(uobj);
169 }
170
171
172
173
174
175 if (reason == RDMA_REMOVE_ABORT)
176 uverbs_uobject_put(uobj);
177
178 return 0;
179}
180
181
182
183
184
185
186
187
188int uobj_destroy(struct ib_uobject *uobj, struct uverbs_attr_bundle *attrs)
189{
190 struct ib_uverbs_file *ufile = attrs->ufile;
191 int ret;
192
193 down_read(&ufile->hw_destroy_rwsem);
194
195
196
197
198
199
200
201
202 ret = uverbs_try_lock_object(uobj, UVERBS_LOOKUP_WRITE);
203 if (ret)
204 goto out_unlock;
205
206 ret = uverbs_destroy_uobject(uobj, RDMA_REMOVE_DESTROY, attrs);
207 if (ret) {
208 atomic_set(&uobj->usecnt, 0);
209 goto out_unlock;
210 }
211
212out_unlock:
213 up_read(&ufile->hw_destroy_rwsem);
214 return ret;
215}
216
217
218
219
220
221
222struct ib_uobject *__uobj_get_destroy(const struct uverbs_api_object *obj,
223 u32 id, struct uverbs_attr_bundle *attrs)
224{
225 struct ib_uobject *uobj;
226 int ret;
227
228 uobj = rdma_lookup_get_uobject(obj, attrs->ufile, id,
229 UVERBS_LOOKUP_DESTROY, attrs);
230 if (IS_ERR(uobj))
231 return uobj;
232
233 ret = uobj_destroy(uobj, attrs);
234 if (ret) {
235 rdma_lookup_put_uobject(uobj, UVERBS_LOOKUP_DESTROY);
236 return ERR_PTR(ret);
237 }
238
239 return uobj;
240}
241
242
243
244
245
246int __uobj_perform_destroy(const struct uverbs_api_object *obj, u32 id,
247 struct uverbs_attr_bundle *attrs)
248{
249 struct ib_uobject *uobj;
250
251 uobj = __uobj_get_destroy(obj, id, attrs);
252 if (IS_ERR(uobj))
253 return PTR_ERR(uobj);
254 uobj_put_destroy(uobj);
255 return 0;
256}
257
258
259static struct ib_uobject *alloc_uobj(struct uverbs_attr_bundle *attrs,
260 const struct uverbs_api_object *obj)
261{
262 struct ib_uverbs_file *ufile = attrs->ufile;
263 struct ib_uobject *uobj;
264
265 if (!attrs->context) {
266 struct ib_ucontext *ucontext =
267 ib_uverbs_get_ucontext_file(ufile);
268
269 if (IS_ERR(ucontext))
270 return ERR_CAST(ucontext);
271 attrs->context = ucontext;
272 }
273
274 uobj = kzalloc(obj->type_attrs->obj_size, GFP_KERNEL);
275 if (!uobj)
276 return ERR_PTR(-ENOMEM);
277
278
279
280
281 uobj->ufile = ufile;
282 uobj->context = attrs->context;
283 INIT_LIST_HEAD(&uobj->list);
284 uobj->uapi_object = obj;
285
286
287
288
289
290 atomic_set(&uobj->usecnt, -1);
291 kref_init(&uobj->ref);
292
293 return uobj;
294}
295
296static int idr_add_uobj(struct ib_uobject *uobj)
297{
298
299
300
301
302
303 return xa_alloc(&uobj->ufile->idr, &uobj->id, NULL, xa_limit_32b,
304 GFP_KERNEL);
305}
306
307
308static struct ib_uobject *
309lookup_get_idr_uobject(const struct uverbs_api_object *obj,
310 struct ib_uverbs_file *ufile, s64 id,
311 enum rdma_lookup_mode mode)
312{
313 struct ib_uobject *uobj;
314
315 if (id < 0 || id > ULONG_MAX)
316 return ERR_PTR(-EINVAL);
317
318 rcu_read_lock();
319
320
321
322
323
324
325 uobj = xa_load(&ufile->idr, id);
326 if (!uobj || !kref_get_unless_zero(&uobj->ref))
327 uobj = ERR_PTR(-ENOENT);
328 rcu_read_unlock();
329 return uobj;
330}
331
332static struct ib_uobject *
333lookup_get_fd_uobject(const struct uverbs_api_object *obj,
334 struct ib_uverbs_file *ufile, s64 id,
335 enum rdma_lookup_mode mode)
336{
337 const struct uverbs_obj_fd_type *fd_type;
338 struct file *f;
339 struct ib_uobject *uobject;
340 int fdno = id;
341
342 if (fdno != id)
343 return ERR_PTR(-EINVAL);
344
345 if (mode != UVERBS_LOOKUP_READ)
346 return ERR_PTR(-EOPNOTSUPP);
347
348 if (!obj->type_attrs)
349 return ERR_PTR(-EIO);
350 fd_type =
351 container_of(obj->type_attrs, struct uverbs_obj_fd_type, type);
352
353 f = fget(fdno);
354 if (!f)
355 return ERR_PTR(-EBADF);
356
357 uobject = f->private_data;
358
359
360
361
362
363 if (f->f_op != fd_type->fops || uobject->ufile != ufile) {
364 fput(f);
365 return ERR_PTR(-EBADF);
366 }
367
368 uverbs_uobject_get(uobject);
369 return uobject;
370}
371
372struct ib_uobject *rdma_lookup_get_uobject(const struct uverbs_api_object *obj,
373 struct ib_uverbs_file *ufile, s64 id,
374 enum rdma_lookup_mode mode,
375 struct uverbs_attr_bundle *attrs)
376{
377 struct ib_uobject *uobj;
378 int ret;
379
380 if (obj == ERR_PTR(-ENOMSG)) {
381
382 uobj = lookup_get_idr_uobject(NULL, ufile, id, mode);
383 if (IS_ERR(uobj))
384 return uobj;
385 } else {
386 if (IS_ERR(obj))
387 return ERR_PTR(-EINVAL);
388
389 uobj = obj->type_class->lookup_get(obj, ufile, id, mode);
390 if (IS_ERR(uobj))
391 return uobj;
392
393 if (uobj->uapi_object != obj) {
394 ret = -EINVAL;
395 goto free;
396 }
397 }
398
399
400
401
402
403 if (mode != UVERBS_LOOKUP_DESTROY &&
404 !srcu_dereference(ufile->device->ib_dev,
405 &ufile->device->disassociate_srcu)) {
406 ret = -EIO;
407 goto free;
408 }
409
410 ret = uverbs_try_lock_object(uobj, mode);
411 if (ret)
412 goto free;
413 if (attrs)
414 attrs->context = uobj->context;
415
416 return uobj;
417free:
418 uobj->uapi_object->type_class->lookup_put(uobj, mode);
419 uverbs_uobject_put(uobj);
420 return ERR_PTR(ret);
421}
422
423static struct ib_uobject *
424alloc_begin_idr_uobject(const struct uverbs_api_object *obj,
425 struct uverbs_attr_bundle *attrs)
426{
427 int ret;
428 struct ib_uobject *uobj;
429
430 uobj = alloc_uobj(attrs, obj);
431 if (IS_ERR(uobj))
432 return uobj;
433
434 ret = idr_add_uobj(uobj);
435 if (ret)
436 goto uobj_put;
437
438 ret = ib_rdmacg_try_charge(&uobj->cg_obj, uobj->context->device,
439 RDMACG_RESOURCE_HCA_OBJECT);
440 if (ret)
441 goto remove;
442
443 return uobj;
444
445remove:
446 xa_erase(&attrs->ufile->idr, uobj->id);
447uobj_put:
448 uverbs_uobject_put(uobj);
449 return ERR_PTR(ret);
450}
451
452static struct ib_uobject *
453alloc_begin_fd_uobject(const struct uverbs_api_object *obj,
454 struct uverbs_attr_bundle *attrs)
455{
456 const struct uverbs_obj_fd_type *fd_type;
457 int new_fd;
458 struct ib_uobject *uobj, *ret;
459 struct file *filp;
460
461 uobj = alloc_uobj(attrs, obj);
462 if (IS_ERR(uobj))
463 return uobj;
464
465 fd_type =
466 container_of(obj->type_attrs, struct uverbs_obj_fd_type, type);
467 if (WARN_ON(fd_type->fops->release != &uverbs_uobject_fd_release &&
468 fd_type->fops->release != &uverbs_async_event_release)) {
469 ret = ERR_PTR(-EINVAL);
470 goto err_fd;
471 }
472
473 new_fd = get_unused_fd_flags(O_CLOEXEC);
474 if (new_fd < 0) {
475 ret = ERR_PTR(new_fd);
476 goto err_fd;
477 }
478
479
480 filp = anon_inode_getfile(fd_type->name, fd_type->fops, NULL,
481 fd_type->flags);
482 if (IS_ERR(filp)) {
483 ret = ERR_CAST(filp);
484 goto err_getfile;
485 }
486 uobj->object = filp;
487
488 uobj->id = new_fd;
489 return uobj;
490
491err_getfile:
492 put_unused_fd(new_fd);
493err_fd:
494 uverbs_uobject_put(uobj);
495 return ret;
496}
497
498struct ib_uobject *rdma_alloc_begin_uobject(const struct uverbs_api_object *obj,
499 struct uverbs_attr_bundle *attrs)
500{
501 struct ib_uverbs_file *ufile = attrs->ufile;
502 struct ib_uobject *ret;
503
504 if (IS_ERR(obj))
505 return ERR_PTR(-EINVAL);
506
507
508
509
510
511
512 if (!down_read_trylock(&ufile->hw_destroy_rwsem))
513 return ERR_PTR(-EIO);
514
515 ret = obj->type_class->alloc_begin(obj, attrs);
516 if (IS_ERR(ret)) {
517 up_read(&ufile->hw_destroy_rwsem);
518 return ret;
519 }
520 return ret;
521}
522
523static void alloc_abort_idr_uobject(struct ib_uobject *uobj)
524{
525 ib_rdmacg_uncharge(&uobj->cg_obj, uobj->context->device,
526 RDMACG_RESOURCE_HCA_OBJECT);
527
528 xa_erase(&uobj->ufile->idr, uobj->id);
529}
530
531static int __must_check destroy_hw_idr_uobject(struct ib_uobject *uobj,
532 enum rdma_remove_reason why,
533 struct uverbs_attr_bundle *attrs)
534{
535 const struct uverbs_obj_idr_type *idr_type =
536 container_of(uobj->uapi_object->type_attrs,
537 struct uverbs_obj_idr_type, type);
538 int ret = idr_type->destroy_object(uobj, why, attrs);
539
540 if (ret)
541 return ret;
542
543 if (why == RDMA_REMOVE_ABORT)
544 return 0;
545
546 ib_rdmacg_uncharge(&uobj->cg_obj, uobj->context->device,
547 RDMACG_RESOURCE_HCA_OBJECT);
548
549 return 0;
550}
551
552static void remove_handle_idr_uobject(struct ib_uobject *uobj)
553{
554 xa_erase(&uobj->ufile->idr, uobj->id);
555
556 uverbs_uobject_put(uobj);
557}
558
559static void alloc_abort_fd_uobject(struct ib_uobject *uobj)
560{
561 struct file *filp = uobj->object;
562
563 fput(filp);
564 put_unused_fd(uobj->id);
565}
566
567static int __must_check destroy_hw_fd_uobject(struct ib_uobject *uobj,
568 enum rdma_remove_reason why,
569 struct uverbs_attr_bundle *attrs)
570{
571 const struct uverbs_obj_fd_type *fd_type = container_of(
572 uobj->uapi_object->type_attrs, struct uverbs_obj_fd_type, type);
573
574 fd_type->destroy_object(uobj, why);
575 return 0;
576}
577
578static void remove_handle_fd_uobject(struct ib_uobject *uobj)
579{
580}
581
582static void alloc_commit_idr_uobject(struct ib_uobject *uobj)
583{
584 struct ib_uverbs_file *ufile = uobj->ufile;
585 void *old;
586
587
588
589
590
591
592
593
594 old = xa_store(&ufile->idr, uobj->id, uobj, GFP_KERNEL);
595 WARN_ON(old != NULL);
596}
597
598static void swap_idr_uobjects(struct ib_uobject *obj_old,
599 struct ib_uobject *obj_new)
600{
601 struct ib_uverbs_file *ufile = obj_old->ufile;
602 void *old;
603
604
605
606
607
608 old = xa_cmpxchg(&ufile->idr, obj_old->id, obj_old, XA_ZERO_ENTRY,
609 GFP_KERNEL);
610 if (WARN_ON(old != obj_old))
611 return;
612
613 swap(obj_old->id, obj_new->id);
614
615 old = xa_cmpxchg(&ufile->idr, obj_old->id, NULL, obj_old, GFP_KERNEL);
616 WARN_ON(old != NULL);
617}
618
619static void alloc_commit_fd_uobject(struct ib_uobject *uobj)
620{
621 int fd = uobj->id;
622 struct file *filp = uobj->object;
623
624
625 kref_get(&uobj->ufile->ref);
626
627
628 uobj->id = 0;
629
630
631
632
633
634 filp->private_data = uobj;
635 fd_install(fd, filp);
636}
637
638
639
640
641
642
643void rdma_alloc_commit_uobject(struct ib_uobject *uobj,
644 struct uverbs_attr_bundle *attrs)
645{
646 struct ib_uverbs_file *ufile = attrs->ufile;
647
648
649 uverbs_uobject_get(uobj);
650 spin_lock_irq(&ufile->uobjects_lock);
651 list_add(&uobj->list, &ufile->uobjects);
652 spin_unlock_irq(&ufile->uobjects_lock);
653
654
655 atomic_set(&uobj->usecnt, 0);
656
657
658 uobj->uapi_object->type_class->alloc_commit(uobj);
659
660
661 up_read(&ufile->hw_destroy_rwsem);
662}
663
664
665
666
667
668
669
670
671
672
673
674
675void rdma_assign_uobject(struct ib_uobject *to_uobj, struct ib_uobject *new_uobj,
676 struct uverbs_attr_bundle *attrs)
677{
678 assert_uverbs_usecnt(new_uobj, UVERBS_LOOKUP_WRITE);
679
680 if (WARN_ON(to_uobj->uapi_object != new_uobj->uapi_object ||
681 !to_uobj->uapi_object->type_class->swap_uobjects))
682 return;
683
684 to_uobj->uapi_object->type_class->swap_uobjects(to_uobj, new_uobj);
685
686
687
688
689
690 uverbs_destroy_uobject(to_uobj, RDMA_REMOVE_DESTROY, attrs);
691}
692
693
694
695
696
697void rdma_alloc_abort_uobject(struct ib_uobject *uobj,
698 struct uverbs_attr_bundle *attrs,
699 bool hw_obj_valid)
700{
701 struct ib_uverbs_file *ufile = uobj->ufile;
702 int ret;
703
704 if (hw_obj_valid) {
705 ret = uobj->uapi_object->type_class->destroy_hw(
706 uobj, RDMA_REMOVE_ABORT, attrs);
707
708
709
710
711
712
713 if (WARN_ON(ret))
714 return rdma_alloc_commit_uobject(uobj, attrs);
715 }
716
717 uverbs_destroy_uobject(uobj, RDMA_REMOVE_ABORT, attrs);
718
719
720 up_read(&ufile->hw_destroy_rwsem);
721}
722
723static void lookup_put_idr_uobject(struct ib_uobject *uobj,
724 enum rdma_lookup_mode mode)
725{
726}
727
728static void lookup_put_fd_uobject(struct ib_uobject *uobj,
729 enum rdma_lookup_mode mode)
730{
731 struct file *filp = uobj->object;
732
733 WARN_ON(mode != UVERBS_LOOKUP_READ);
734
735
736
737
738 fput(filp);
739}
740
741void rdma_lookup_put_uobject(struct ib_uobject *uobj,
742 enum rdma_lookup_mode mode)
743{
744 assert_uverbs_usecnt(uobj, mode);
745
746
747
748
749
750 switch (mode) {
751 case UVERBS_LOOKUP_READ:
752 atomic_dec(&uobj->usecnt);
753 break;
754 case UVERBS_LOOKUP_WRITE:
755 atomic_set(&uobj->usecnt, 0);
756 break;
757 case UVERBS_LOOKUP_DESTROY:
758 break;
759 }
760
761 uobj->uapi_object->type_class->lookup_put(uobj, mode);
762
763 uverbs_uobject_put(uobj);
764}
765
766void setup_ufile_idr_uobject(struct ib_uverbs_file *ufile)
767{
768 xa_init_flags(&ufile->idr, XA_FLAGS_ALLOC);
769}
770
771void release_ufile_idr_uobject(struct ib_uverbs_file *ufile)
772{
773 struct ib_uobject *entry;
774 unsigned long id;
775
776
777
778
779
780
781
782
783
784 xa_for_each(&ufile->idr, id, entry) {
785 WARN_ON(entry->object);
786 uverbs_uobject_put(entry);
787 }
788
789 xa_destroy(&ufile->idr);
790}
791
792const struct uverbs_obj_type_class uverbs_idr_class = {
793 .alloc_begin = alloc_begin_idr_uobject,
794 .lookup_get = lookup_get_idr_uobject,
795 .alloc_commit = alloc_commit_idr_uobject,
796 .alloc_abort = alloc_abort_idr_uobject,
797 .lookup_put = lookup_put_idr_uobject,
798 .destroy_hw = destroy_hw_idr_uobject,
799 .remove_handle = remove_handle_idr_uobject,
800 .swap_uobjects = swap_idr_uobjects,
801};
802EXPORT_SYMBOL(uverbs_idr_class);
803
804
805
806
807
808int uverbs_uobject_fd_release(struct inode *inode, struct file *filp)
809{
810 struct ib_uverbs_file *ufile;
811 struct ib_uobject *uobj;
812
813
814
815
816 if (!filp->private_data)
817 return 0;
818 uobj = filp->private_data;
819 ufile = uobj->ufile;
820
821 if (down_read_trylock(&ufile->hw_destroy_rwsem)) {
822 struct uverbs_attr_bundle attrs = {
823 .context = uobj->context,
824 .ufile = ufile,
825 };
826
827
828
829
830
831
832
833 WARN_ON(uverbs_try_lock_object(uobj, UVERBS_LOOKUP_WRITE));
834 uverbs_destroy_uobject(uobj, RDMA_REMOVE_CLOSE, &attrs);
835 up_read(&ufile->hw_destroy_rwsem);
836 }
837
838
839 kref_put(&ufile->ref, ib_uverbs_release_file);
840
841
842 uverbs_uobject_put(uobj);
843 return 0;
844}
845EXPORT_SYMBOL(uverbs_uobject_fd_release);
846
847
848
849
850
851static void ufile_destroy_ucontext(struct ib_uverbs_file *ufile,
852 enum rdma_remove_reason reason)
853{
854 struct ib_ucontext *ucontext = ufile->ucontext;
855 struct ib_device *ib_dev = ucontext->device;
856
857
858
859
860
861
862 if (reason == RDMA_REMOVE_DRIVER_REMOVE) {
863 uverbs_user_mmap_disassociate(ufile);
864 if (ib_dev->ops.disassociate_ucontext)
865 ib_dev->ops.disassociate_ucontext(ucontext);
866 }
867
868 ib_rdmacg_uncharge(&ucontext->cg_obj, ib_dev,
869 RDMACG_RESOURCE_HCA_HANDLE);
870
871 rdma_restrack_del(&ucontext->res);
872
873 ib_dev->ops.dealloc_ucontext(ucontext);
874 WARN_ON(!xa_empty(&ucontext->mmap_xa));
875 kfree(ucontext);
876
877 ufile->ucontext = NULL;
878}
879
880static int __uverbs_cleanup_ufile(struct ib_uverbs_file *ufile,
881 enum rdma_remove_reason reason)
882{
883 struct ib_uobject *obj, *next_obj;
884 int ret = -EINVAL;
885 struct uverbs_attr_bundle attrs = { .ufile = ufile };
886
887
888
889
890
891
892
893
894
895
896 list_for_each_entry_safe(obj, next_obj, &ufile->uobjects, list) {
897 attrs.context = obj->context;
898
899
900
901
902 WARN_ON(uverbs_try_lock_object(obj, UVERBS_LOOKUP_WRITE));
903 if (reason == RDMA_REMOVE_DRIVER_FAILURE)
904 obj->object = NULL;
905 if (!uverbs_destroy_uobject(obj, reason, &attrs))
906 ret = 0;
907 else
908 atomic_set(&obj->usecnt, 0);
909 }
910
911 if (reason == RDMA_REMOVE_DRIVER_FAILURE) {
912 WARN_ON(!list_empty(&ufile->uobjects));
913 return 0;
914 }
915 return ret;
916}
917
918
919
920
921
922
923
924void uverbs_destroy_ufile_hw(struct ib_uverbs_file *ufile,
925 enum rdma_remove_reason reason)
926{
927 down_write(&ufile->hw_destroy_rwsem);
928
929
930
931
932
933 if (!ufile->ucontext)
934 goto done;
935
936 while (!list_empty(&ufile->uobjects) &&
937 !__uverbs_cleanup_ufile(ufile, reason)) {
938 }
939
940 if (WARN_ON(!list_empty(&ufile->uobjects)))
941 __uverbs_cleanup_ufile(ufile, RDMA_REMOVE_DRIVER_FAILURE);
942 ufile_destroy_ucontext(ufile, reason);
943
944done:
945 up_write(&ufile->hw_destroy_rwsem);
946}
947
948const struct uverbs_obj_type_class uverbs_fd_class = {
949 .alloc_begin = alloc_begin_fd_uobject,
950 .lookup_get = lookup_get_fd_uobject,
951 .alloc_commit = alloc_commit_fd_uobject,
952 .alloc_abort = alloc_abort_fd_uobject,
953 .lookup_put = lookup_put_fd_uobject,
954 .destroy_hw = destroy_hw_fd_uobject,
955 .remove_handle = remove_handle_fd_uobject,
956};
957EXPORT_SYMBOL(uverbs_fd_class);
958
959struct ib_uobject *
960uverbs_get_uobject_from_file(u16 object_id, enum uverbs_obj_access access,
961 s64 id, struct uverbs_attr_bundle *attrs)
962{
963 const struct uverbs_api_object *obj =
964 uapi_get_object(attrs->ufile->device->uapi, object_id);
965
966 switch (access) {
967 case UVERBS_ACCESS_READ:
968 return rdma_lookup_get_uobject(obj, attrs->ufile, id,
969 UVERBS_LOOKUP_READ, attrs);
970 case UVERBS_ACCESS_DESTROY:
971
972 return rdma_lookup_get_uobject(obj, attrs->ufile, id,
973 UVERBS_LOOKUP_DESTROY, attrs);
974 case UVERBS_ACCESS_WRITE:
975 return rdma_lookup_get_uobject(obj, attrs->ufile, id,
976 UVERBS_LOOKUP_WRITE, attrs);
977 case UVERBS_ACCESS_NEW:
978 return rdma_alloc_begin_uobject(obj, attrs);
979 default:
980 WARN_ON(true);
981 return ERR_PTR(-EOPNOTSUPP);
982 }
983}
984
985void uverbs_finalize_object(struct ib_uobject *uobj,
986 enum uverbs_obj_access access, bool hw_obj_valid,
987 bool commit, struct uverbs_attr_bundle *attrs)
988{
989
990
991
992
993
994
995 switch (access) {
996 case UVERBS_ACCESS_READ:
997 rdma_lookup_put_uobject(uobj, UVERBS_LOOKUP_READ);
998 break;
999 case UVERBS_ACCESS_WRITE:
1000 rdma_lookup_put_uobject(uobj, UVERBS_LOOKUP_WRITE);
1001 break;
1002 case UVERBS_ACCESS_DESTROY:
1003 if (uobj)
1004 rdma_lookup_put_uobject(uobj, UVERBS_LOOKUP_DESTROY);
1005 break;
1006 case UVERBS_ACCESS_NEW:
1007 if (commit)
1008 rdma_alloc_commit_uobject(uobj, attrs);
1009 else
1010 rdma_alloc_abort_uobject(uobj, attrs, hw_obj_valid);
1011 break;
1012 default:
1013 WARN_ON(true);
1014 }
1015}
1016