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12
13#include <linux/rwsem.h>
14#include <linux/mutex.h>
15#include <linux/ww_mutex.h>
16#include <linux/sched.h>
17#include <linux/delay.h>
18#include <linux/lockdep.h>
19#include <linux/spinlock.h>
20#include <linux/kallsyms.h>
21#include <linux/interrupt.h>
22#include <linux/debug_locks.h>
23#include <linux/irqflags.h>
24
25
26
27
28static unsigned int debug_locks_verbose;
29
30static DEFINE_WW_CLASS(ww_lockdep);
31
32static int __init setup_debug_locks_verbose(char *str)
33{
34 get_option(&str, &debug_locks_verbose);
35
36 return 1;
37}
38
39__setup("debug_locks_verbose=", setup_debug_locks_verbose);
40
41#define FAILURE 0
42#define SUCCESS 1
43
44#define LOCKTYPE_SPIN 0x1
45#define LOCKTYPE_RWLOCK 0x2
46#define LOCKTYPE_MUTEX 0x4
47#define LOCKTYPE_RWSEM 0x8
48#define LOCKTYPE_WW 0x10
49
50static struct ww_acquire_ctx t, t2;
51static struct ww_mutex o, o2, o3;
52
53
54
55
56
57static DEFINE_RAW_SPINLOCK(lock_A);
58static DEFINE_RAW_SPINLOCK(lock_B);
59static DEFINE_RAW_SPINLOCK(lock_C);
60static DEFINE_RAW_SPINLOCK(lock_D);
61
62static DEFINE_RWLOCK(rwlock_A);
63static DEFINE_RWLOCK(rwlock_B);
64static DEFINE_RWLOCK(rwlock_C);
65static DEFINE_RWLOCK(rwlock_D);
66
67static DEFINE_MUTEX(mutex_A);
68static DEFINE_MUTEX(mutex_B);
69static DEFINE_MUTEX(mutex_C);
70static DEFINE_MUTEX(mutex_D);
71
72static DECLARE_RWSEM(rwsem_A);
73static DECLARE_RWSEM(rwsem_B);
74static DECLARE_RWSEM(rwsem_C);
75static DECLARE_RWSEM(rwsem_D);
76
77
78
79
80
81
82
83static DEFINE_RAW_SPINLOCK(lock_X1);
84static DEFINE_RAW_SPINLOCK(lock_X2);
85static DEFINE_RAW_SPINLOCK(lock_Y1);
86static DEFINE_RAW_SPINLOCK(lock_Y2);
87static DEFINE_RAW_SPINLOCK(lock_Z1);
88static DEFINE_RAW_SPINLOCK(lock_Z2);
89
90static DEFINE_RWLOCK(rwlock_X1);
91static DEFINE_RWLOCK(rwlock_X2);
92static DEFINE_RWLOCK(rwlock_Y1);
93static DEFINE_RWLOCK(rwlock_Y2);
94static DEFINE_RWLOCK(rwlock_Z1);
95static DEFINE_RWLOCK(rwlock_Z2);
96
97static DEFINE_MUTEX(mutex_X1);
98static DEFINE_MUTEX(mutex_X2);
99static DEFINE_MUTEX(mutex_Y1);
100static DEFINE_MUTEX(mutex_Y2);
101static DEFINE_MUTEX(mutex_Z1);
102static DEFINE_MUTEX(mutex_Z2);
103
104static DECLARE_RWSEM(rwsem_X1);
105static DECLARE_RWSEM(rwsem_X2);
106static DECLARE_RWSEM(rwsem_Y1);
107static DECLARE_RWSEM(rwsem_Y2);
108static DECLARE_RWSEM(rwsem_Z1);
109static DECLARE_RWSEM(rwsem_Z2);
110
111
112
113
114
115#define INIT_CLASS_FUNC(class) \
116static noinline void \
117init_class_##class(raw_spinlock_t *lock, rwlock_t *rwlock, \
118 struct mutex *mutex, struct rw_semaphore *rwsem)\
119{ \
120 raw_spin_lock_init(lock); \
121 rwlock_init(rwlock); \
122 mutex_init(mutex); \
123 init_rwsem(rwsem); \
124}
125
126INIT_CLASS_FUNC(X)
127INIT_CLASS_FUNC(Y)
128INIT_CLASS_FUNC(Z)
129
130static void init_shared_classes(void)
131{
132 init_class_X(&lock_X1, &rwlock_X1, &mutex_X1, &rwsem_X1);
133 init_class_X(&lock_X2, &rwlock_X2, &mutex_X2, &rwsem_X2);
134
135 init_class_Y(&lock_Y1, &rwlock_Y1, &mutex_Y1, &rwsem_Y1);
136 init_class_Y(&lock_Y2, &rwlock_Y2, &mutex_Y2, &rwsem_Y2);
137
138 init_class_Z(&lock_Z1, &rwlock_Z1, &mutex_Z1, &rwsem_Z1);
139 init_class_Z(&lock_Z2, &rwlock_Z2, &mutex_Z2, &rwsem_Z2);
140}
141
142
143
144
145
146
147
148#define HARDIRQ_DISABLE local_irq_disable
149#define HARDIRQ_ENABLE local_irq_enable
150
151#define HARDIRQ_ENTER() \
152 local_irq_disable(); \
153 __irq_enter(); \
154 WARN_ON(!in_irq());
155
156#define HARDIRQ_EXIT() \
157 __irq_exit(); \
158 local_irq_enable();
159
160#define SOFTIRQ_DISABLE local_bh_disable
161#define SOFTIRQ_ENABLE local_bh_enable
162
163#define SOFTIRQ_ENTER() \
164 local_bh_disable(); \
165 local_irq_disable(); \
166 lockdep_softirq_enter(); \
167 WARN_ON(!in_softirq());
168
169#define SOFTIRQ_EXIT() \
170 lockdep_softirq_exit(); \
171 local_irq_enable(); \
172 local_bh_enable();
173
174
175
176
177
178#define L(x) raw_spin_lock(&lock_##x)
179#define U(x) raw_spin_unlock(&lock_##x)
180#define LU(x) L(x); U(x)
181#define SI(x) raw_spin_lock_init(&lock_##x)
182
183#define WL(x) write_lock(&rwlock_##x)
184#define WU(x) write_unlock(&rwlock_##x)
185#define WLU(x) WL(x); WU(x)
186
187#define RL(x) read_lock(&rwlock_##x)
188#define RU(x) read_unlock(&rwlock_##x)
189#define RLU(x) RL(x); RU(x)
190#define RWI(x) rwlock_init(&rwlock_##x)
191
192#define ML(x) mutex_lock(&mutex_##x)
193#define MU(x) mutex_unlock(&mutex_##x)
194#define MI(x) mutex_init(&mutex_##x)
195
196#define WSL(x) down_write(&rwsem_##x)
197#define WSU(x) up_write(&rwsem_##x)
198
199#define RSL(x) down_read(&rwsem_##x)
200#define RSU(x) up_read(&rwsem_##x)
201#define RWSI(x) init_rwsem(&rwsem_##x)
202
203#ifndef CONFIG_DEBUG_WW_MUTEX_SLOWPATH
204#define WWAI(x) ww_acquire_init(x, &ww_lockdep)
205#else
206#define WWAI(x) do { ww_acquire_init(x, &ww_lockdep); (x)->deadlock_inject_countdown = ~0U; } while (0)
207#endif
208#define WWAD(x) ww_acquire_done(x)
209#define WWAF(x) ww_acquire_fini(x)
210
211#define WWL(x, c) ww_mutex_lock(x, c)
212#define WWT(x) ww_mutex_trylock(x)
213#define WWL1(x) ww_mutex_lock(x, NULL)
214#define WWU(x) ww_mutex_unlock(x)
215
216
217#define LOCK_UNLOCK_2(x,y) LOCK(x); LOCK(y); UNLOCK(y); UNLOCK(x)
218
219
220
221
222
223
224#define GENERATE_TESTCASE(name) \
225 \
226static void name(void) { E(); }
227
228#define GENERATE_PERMUTATIONS_2_EVENTS(name) \
229 \
230static void name##_12(void) { E1(); E2(); } \
231static void name##_21(void) { E2(); E1(); }
232
233#define GENERATE_PERMUTATIONS_3_EVENTS(name) \
234 \
235static void name##_123(void) { E1(); E2(); E3(); } \
236static void name##_132(void) { E1(); E3(); E2(); } \
237static void name##_213(void) { E2(); E1(); E3(); } \
238static void name##_231(void) { E2(); E3(); E1(); } \
239static void name##_312(void) { E3(); E1(); E2(); } \
240static void name##_321(void) { E3(); E2(); E1(); }
241
242
243
244
245
246#define E() \
247 \
248 LOCK(X1); \
249 LOCK(X2);
250
251
252
253
254#include "locking-selftest-spin.h"
255GENERATE_TESTCASE(AA_spin)
256#include "locking-selftest-wlock.h"
257GENERATE_TESTCASE(AA_wlock)
258#include "locking-selftest-rlock.h"
259GENERATE_TESTCASE(AA_rlock)
260#include "locking-selftest-mutex.h"
261GENERATE_TESTCASE(AA_mutex)
262#include "locking-selftest-wsem.h"
263GENERATE_TESTCASE(AA_wsem)
264#include "locking-selftest-rsem.h"
265GENERATE_TESTCASE(AA_rsem)
266
267#undef E
268
269
270
271
272
273static void rlock_AA1(void)
274{
275 RL(X1);
276 RL(X1);
277}
278
279static void rlock_AA1B(void)
280{
281 RL(X1);
282 RL(X2);
283}
284
285static void rsem_AA1(void)
286{
287 RSL(X1);
288 RSL(X1);
289}
290
291static void rsem_AA1B(void)
292{
293 RSL(X1);
294 RSL(X2);
295}
296
297
298
299static void rlock_AA2(void)
300{
301 RL(X1);
302 WL(X2);
303}
304
305static void rsem_AA2(void)
306{
307 RSL(X1);
308 WSL(X2);
309}
310
311static void rlock_AA3(void)
312{
313 WL(X1);
314 RL(X2);
315}
316
317static void rsem_AA3(void)
318{
319 WSL(X1);
320 RSL(X2);
321}
322
323
324
325
326
327#define E() \
328 \
329 LOCK_UNLOCK_2(A, B); \
330 LOCK_UNLOCK_2(B, A);
331
332
333
334
335#include "locking-selftest-spin.h"
336GENERATE_TESTCASE(ABBA_spin)
337#include "locking-selftest-wlock.h"
338GENERATE_TESTCASE(ABBA_wlock)
339#include "locking-selftest-rlock.h"
340GENERATE_TESTCASE(ABBA_rlock)
341#include "locking-selftest-mutex.h"
342GENERATE_TESTCASE(ABBA_mutex)
343#include "locking-selftest-wsem.h"
344GENERATE_TESTCASE(ABBA_wsem)
345#include "locking-selftest-rsem.h"
346GENERATE_TESTCASE(ABBA_rsem)
347
348#undef E
349
350
351
352
353
354#define E() \
355 \
356 LOCK_UNLOCK_2(A, B); \
357 LOCK_UNLOCK_2(B, C); \
358 LOCK_UNLOCK_2(C, A);
359
360
361
362
363#include "locking-selftest-spin.h"
364GENERATE_TESTCASE(ABBCCA_spin)
365#include "locking-selftest-wlock.h"
366GENERATE_TESTCASE(ABBCCA_wlock)
367#include "locking-selftest-rlock.h"
368GENERATE_TESTCASE(ABBCCA_rlock)
369#include "locking-selftest-mutex.h"
370GENERATE_TESTCASE(ABBCCA_mutex)
371#include "locking-selftest-wsem.h"
372GENERATE_TESTCASE(ABBCCA_wsem)
373#include "locking-selftest-rsem.h"
374GENERATE_TESTCASE(ABBCCA_rsem)
375
376#undef E
377
378
379
380
381
382#define E() \
383 \
384 LOCK_UNLOCK_2(A, B); \
385 LOCK_UNLOCK_2(C, A); \
386 LOCK_UNLOCK_2(B, C);
387
388
389
390
391#include "locking-selftest-spin.h"
392GENERATE_TESTCASE(ABCABC_spin)
393#include "locking-selftest-wlock.h"
394GENERATE_TESTCASE(ABCABC_wlock)
395#include "locking-selftest-rlock.h"
396GENERATE_TESTCASE(ABCABC_rlock)
397#include "locking-selftest-mutex.h"
398GENERATE_TESTCASE(ABCABC_mutex)
399#include "locking-selftest-wsem.h"
400GENERATE_TESTCASE(ABCABC_wsem)
401#include "locking-selftest-rsem.h"
402GENERATE_TESTCASE(ABCABC_rsem)
403
404#undef E
405
406
407
408
409
410#define E() \
411 \
412 LOCK_UNLOCK_2(A, B); \
413 LOCK_UNLOCK_2(B, C); \
414 LOCK_UNLOCK_2(C, D); \
415 LOCK_UNLOCK_2(D, A);
416
417
418
419
420#include "locking-selftest-spin.h"
421GENERATE_TESTCASE(ABBCCDDA_spin)
422#include "locking-selftest-wlock.h"
423GENERATE_TESTCASE(ABBCCDDA_wlock)
424#include "locking-selftest-rlock.h"
425GENERATE_TESTCASE(ABBCCDDA_rlock)
426#include "locking-selftest-mutex.h"
427GENERATE_TESTCASE(ABBCCDDA_mutex)
428#include "locking-selftest-wsem.h"
429GENERATE_TESTCASE(ABBCCDDA_wsem)
430#include "locking-selftest-rsem.h"
431GENERATE_TESTCASE(ABBCCDDA_rsem)
432
433#undef E
434
435
436
437
438#define E() \
439 \
440 LOCK_UNLOCK_2(A, B); \
441 LOCK_UNLOCK_2(C, D); \
442 LOCK_UNLOCK_2(B, D); \
443 LOCK_UNLOCK_2(D, A);
444
445
446
447
448#include "locking-selftest-spin.h"
449GENERATE_TESTCASE(ABCDBDDA_spin)
450#include "locking-selftest-wlock.h"
451GENERATE_TESTCASE(ABCDBDDA_wlock)
452#include "locking-selftest-rlock.h"
453GENERATE_TESTCASE(ABCDBDDA_rlock)
454#include "locking-selftest-mutex.h"
455GENERATE_TESTCASE(ABCDBDDA_mutex)
456#include "locking-selftest-wsem.h"
457GENERATE_TESTCASE(ABCDBDDA_wsem)
458#include "locking-selftest-rsem.h"
459GENERATE_TESTCASE(ABCDBDDA_rsem)
460
461#undef E
462
463
464
465
466#define E() \
467 \
468 LOCK_UNLOCK_2(A, B); \
469 LOCK_UNLOCK_2(C, D); \
470 LOCK_UNLOCK_2(B, C); \
471 LOCK_UNLOCK_2(D, A);
472
473
474
475
476#include "locking-selftest-spin.h"
477GENERATE_TESTCASE(ABCDBCDA_spin)
478#include "locking-selftest-wlock.h"
479GENERATE_TESTCASE(ABCDBCDA_wlock)
480#include "locking-selftest-rlock.h"
481GENERATE_TESTCASE(ABCDBCDA_rlock)
482#include "locking-selftest-mutex.h"
483GENERATE_TESTCASE(ABCDBCDA_mutex)
484#include "locking-selftest-wsem.h"
485GENERATE_TESTCASE(ABCDBCDA_wsem)
486#include "locking-selftest-rsem.h"
487GENERATE_TESTCASE(ABCDBCDA_rsem)
488
489#undef E
490
491
492
493
494#define E() \
495 \
496 LOCK(A); \
497 UNLOCK(A); \
498 UNLOCK(A);
499
500
501
502
503#include "locking-selftest-spin.h"
504GENERATE_TESTCASE(double_unlock_spin)
505#include "locking-selftest-wlock.h"
506GENERATE_TESTCASE(double_unlock_wlock)
507#include "locking-selftest-rlock.h"
508GENERATE_TESTCASE(double_unlock_rlock)
509#include "locking-selftest-mutex.h"
510GENERATE_TESTCASE(double_unlock_mutex)
511#include "locking-selftest-wsem.h"
512GENERATE_TESTCASE(double_unlock_wsem)
513#include "locking-selftest-rsem.h"
514GENERATE_TESTCASE(double_unlock_rsem)
515
516#undef E
517
518
519
520
521#define E() \
522 \
523 LOCK(A); \
524 LOCK(B); \
525 UNLOCK(A); \
526 UNLOCK(B);
527
528
529
530
531#include "locking-selftest-spin.h"
532GENERATE_TESTCASE(bad_unlock_order_spin)
533#include "locking-selftest-wlock.h"
534GENERATE_TESTCASE(bad_unlock_order_wlock)
535#include "locking-selftest-rlock.h"
536GENERATE_TESTCASE(bad_unlock_order_rlock)
537#include "locking-selftest-mutex.h"
538GENERATE_TESTCASE(bad_unlock_order_mutex)
539#include "locking-selftest-wsem.h"
540GENERATE_TESTCASE(bad_unlock_order_wsem)
541#include "locking-selftest-rsem.h"
542GENERATE_TESTCASE(bad_unlock_order_rsem)
543
544#undef E
545
546
547
548
549#define E() \
550 \
551 LOCK(A); \
552 INIT(A);
553
554
555
556
557#include "locking-selftest-spin.h"
558GENERATE_TESTCASE(init_held_spin)
559#include "locking-selftest-wlock.h"
560GENERATE_TESTCASE(init_held_wlock)
561#include "locking-selftest-rlock.h"
562GENERATE_TESTCASE(init_held_rlock)
563#include "locking-selftest-mutex.h"
564GENERATE_TESTCASE(init_held_mutex)
565#include "locking-selftest-wsem.h"
566GENERATE_TESTCASE(init_held_wsem)
567#include "locking-selftest-rsem.h"
568GENERATE_TESTCASE(init_held_rsem)
569
570#undef E
571
572
573
574
575#define E1() \
576 \
577 IRQ_ENTER(); \
578 LOCK(A); \
579 UNLOCK(A); \
580 IRQ_EXIT();
581
582#define E2() \
583 \
584 LOCK(A); \
585 UNLOCK(A);
586
587
588
589
590#include "locking-selftest-spin-hardirq.h"
591GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_spin)
592
593#include "locking-selftest-rlock-hardirq.h"
594GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_rlock)
595
596#include "locking-selftest-wlock-hardirq.h"
597GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_wlock)
598
599#include "locking-selftest-spin-softirq.h"
600GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_spin)
601
602#include "locking-selftest-rlock-softirq.h"
603GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_rlock)
604
605#include "locking-selftest-wlock-softirq.h"
606GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_wlock)
607
608#undef E1
609#undef E2
610
611
612
613
614#define E1() \
615 \
616 SOFTIRQ_ENTER(); \
617 LOCK(A); \
618 UNLOCK(A); \
619 SOFTIRQ_EXIT();
620
621#define E2() \
622 \
623 HARDIRQ_DISABLE(); \
624 LOCK(A); \
625 HARDIRQ_ENABLE(); \
626 UNLOCK(A);
627
628
629
630
631#include "locking-selftest-spin.h"
632GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_spin)
633
634#include "locking-selftest-wlock.h"
635GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_wlock)
636
637#include "locking-selftest-rlock.h"
638GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_rlock)
639
640#undef E1
641#undef E2
642
643
644
645
646#define E1() \
647 \
648 IRQ_ENTER(); \
649 LOCK(A); \
650 UNLOCK(A); \
651 IRQ_EXIT();
652
653#define E2() \
654 \
655 IRQ_DISABLE(); \
656 LOCK(A); \
657 IRQ_ENABLE(); \
658 UNLOCK(A);
659
660
661
662
663#include "locking-selftest-spin-hardirq.h"
664GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_spin)
665
666#include "locking-selftest-rlock-hardirq.h"
667GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_rlock)
668
669#include "locking-selftest-wlock-hardirq.h"
670GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_wlock)
671
672#include "locking-selftest-spin-softirq.h"
673GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_spin)
674
675#include "locking-selftest-rlock-softirq.h"
676GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_rlock)
677
678#include "locking-selftest-wlock-softirq.h"
679GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_wlock)
680
681#undef E1
682#undef E2
683
684
685
686
687#define E1() \
688 \
689 LOCK(A); \
690 LOCK(B); \
691 UNLOCK(B); \
692 UNLOCK(A); \
693
694#define E2() \
695 \
696 LOCK(B); \
697 UNLOCK(B);
698
699#define E3() \
700 \
701 IRQ_ENTER(); \
702 LOCK(A); \
703 UNLOCK(A); \
704 IRQ_EXIT();
705
706
707
708
709#include "locking-selftest-spin-hardirq.h"
710GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_spin)
711
712#include "locking-selftest-rlock-hardirq.h"
713GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_rlock)
714
715#include "locking-selftest-wlock-hardirq.h"
716GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_wlock)
717
718#include "locking-selftest-spin-softirq.h"
719GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_spin)
720
721#include "locking-selftest-rlock-softirq.h"
722GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_rlock)
723
724#include "locking-selftest-wlock-softirq.h"
725GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_wlock)
726
727#undef E1
728#undef E2
729#undef E3
730
731
732
733
734
735
736#define E1() \
737 IRQ_DISABLE(); \
738 LOCK(A); \
739 LOCK(B); \
740 UNLOCK(B); \
741 UNLOCK(A); \
742 IRQ_ENABLE();
743
744#define E2() \
745 LOCK(B); \
746 UNLOCK(B);
747
748#define E3() \
749 IRQ_ENTER(); \
750 LOCK(A); \
751 UNLOCK(A); \
752 IRQ_EXIT();
753
754
755
756
757#include "locking-selftest-spin-hardirq.h"
758GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_spin)
759
760#include "locking-selftest-rlock-hardirq.h"
761GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_rlock)
762
763#include "locking-selftest-wlock-hardirq.h"
764GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_wlock)
765
766#include "locking-selftest-spin-softirq.h"
767GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_spin)
768
769#include "locking-selftest-rlock-softirq.h"
770GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_rlock)
771
772#include "locking-selftest-wlock-softirq.h"
773GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_wlock)
774
775#undef E1
776#undef E2
777#undef E3
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795#define E1() \
796 \
797 IRQ_DISABLE(); \
798 WL(A); \
799 LOCK(B); \
800 UNLOCK(B); \
801 WU(A); \
802 IRQ_ENABLE();
803
804#define E2() \
805 \
806 LOCK(B); \
807 UNLOCK(B);
808
809#define E3() \
810 \
811 IRQ_ENTER(); \
812 RL(A); \
813 RU(A); \
814 IRQ_EXIT();
815
816
817
818
819#include "locking-selftest-spin-hardirq.h"
820GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_hard_spin)
821
822#include "locking-selftest-rlock-hardirq.h"
823GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_hard_rlock)
824
825#include "locking-selftest-wlock-hardirq.h"
826GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_hard_wlock)
827
828#include "locking-selftest-spin-softirq.h"
829GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_soft_spin)
830
831#include "locking-selftest-rlock-softirq.h"
832GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_soft_rlock)
833
834#include "locking-selftest-wlock-softirq.h"
835GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_soft_wlock)
836
837#undef E1
838#undef E2
839#undef E3
840
841
842
843
844
845#define E1() \
846 \
847 IRQ_DISABLE(); \
848 WL(A); \
849 WU(A); \
850 IRQ_ENABLE();
851
852#define E2() \
853 \
854 RL(A); \
855 RU(A); \
856
857#define E3() \
858 \
859 IRQ_ENTER(); \
860 RL(A); \
861 L(B); \
862 U(B); \
863 RU(A); \
864 IRQ_EXIT();
865
866
867
868
869#include "locking-selftest-hardirq.h"
870GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_hard)
871
872#include "locking-selftest-softirq.h"
873GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_soft)
874
875#undef E1
876#undef E2
877#undef E3
878
879
880
881
882
883#define E1() \
884 \
885 IRQ_DISABLE(); \
886 L(B); \
887 WL(A); \
888 WU(A); \
889 U(B); \
890 IRQ_ENABLE();
891
892#define E2() \
893 \
894 RL(A); \
895 RU(A); \
896
897#define E3() \
898 \
899 IRQ_ENTER(); \
900 L(B); \
901 U(B); \
902 IRQ_EXIT();
903
904
905
906
907#include "locking-selftest-hardirq.h"
908
909
910#include "locking-selftest-softirq.h"
911
912
913#ifdef CONFIG_DEBUG_LOCK_ALLOC
914# define I_SPINLOCK(x) lockdep_reset_lock(&lock_##x.dep_map)
915# define I_RWLOCK(x) lockdep_reset_lock(&rwlock_##x.dep_map)
916# define I_MUTEX(x) lockdep_reset_lock(&mutex_##x.dep_map)
917# define I_RWSEM(x) lockdep_reset_lock(&rwsem_##x.dep_map)
918# define I_WW(x) lockdep_reset_lock(&x.dep_map)
919#else
920# define I_SPINLOCK(x)
921# define I_RWLOCK(x)
922# define I_MUTEX(x)
923# define I_RWSEM(x)
924# define I_WW(x)
925#endif
926
927#define I1(x) \
928 do { \
929 I_SPINLOCK(x); \
930 I_RWLOCK(x); \
931 I_MUTEX(x); \
932 I_RWSEM(x); \
933 } while (0)
934
935#define I2(x) \
936 do { \
937 raw_spin_lock_init(&lock_##x); \
938 rwlock_init(&rwlock_##x); \
939 mutex_init(&mutex_##x); \
940 init_rwsem(&rwsem_##x); \
941 } while (0)
942
943static void reset_locks(void)
944{
945 local_irq_disable();
946 lockdep_free_key_range(&ww_lockdep.acquire_key, 1);
947 lockdep_free_key_range(&ww_lockdep.mutex_key, 1);
948
949 I1(A); I1(B); I1(C); I1(D);
950 I1(X1); I1(X2); I1(Y1); I1(Y2); I1(Z1); I1(Z2);
951 I_WW(t); I_WW(t2); I_WW(o.base); I_WW(o2.base); I_WW(o3.base);
952 lockdep_reset();
953 I2(A); I2(B); I2(C); I2(D);
954 init_shared_classes();
955
956 ww_mutex_init(&o, &ww_lockdep); ww_mutex_init(&o2, &ww_lockdep); ww_mutex_init(&o3, &ww_lockdep);
957 memset(&t, 0, sizeof(t)); memset(&t2, 0, sizeof(t2));
958 memset(&ww_lockdep.acquire_key, 0, sizeof(ww_lockdep.acquire_key));
959 memset(&ww_lockdep.mutex_key, 0, sizeof(ww_lockdep.mutex_key));
960 local_irq_enable();
961}
962
963#undef I
964
965static int testcase_total;
966static int testcase_successes;
967static int expected_testcase_failures;
968static int unexpected_testcase_failures;
969
970static void dotest(void (*testcase_fn)(void), int expected, int lockclass_mask)
971{
972 unsigned long saved_preempt_count = preempt_count();
973
974 WARN_ON(irqs_disabled());
975
976 testcase_fn();
977
978
979
980#ifndef CONFIG_PROVE_LOCKING
981 if (expected == FAILURE && debug_locks) {
982 expected_testcase_failures++;
983 printk("failed|");
984 }
985 else
986#endif
987 if (debug_locks != expected) {
988 unexpected_testcase_failures++;
989 printk("FAILED|");
990
991 dump_stack();
992 } else {
993 testcase_successes++;
994 printk(" ok |");
995 }
996 testcase_total++;
997
998 if (debug_locks_verbose)
999 printk(" lockclass mask: %x, debug_locks: %d, expected: %d\n",
1000 lockclass_mask, debug_locks, expected);
1001
1002
1003
1004
1005 preempt_count_set(saved_preempt_count);
1006#ifdef CONFIG_TRACE_IRQFLAGS
1007 if (softirq_count())
1008 current->softirqs_enabled = 0;
1009 else
1010 current->softirqs_enabled = 1;
1011#endif
1012
1013 reset_locks();
1014}
1015
1016static inline void print_testname(const char *testname)
1017{
1018 printk("%33s:", testname);
1019}
1020
1021#define DO_TESTCASE_1(desc, name, nr) \
1022 print_testname(desc"/"#nr); \
1023 dotest(name##_##nr, SUCCESS, LOCKTYPE_RWLOCK); \
1024 printk("\n");
1025
1026#define DO_TESTCASE_1B(desc, name, nr) \
1027 print_testname(desc"/"#nr); \
1028 dotest(name##_##nr, FAILURE, LOCKTYPE_RWLOCK); \
1029 printk("\n");
1030
1031#define DO_TESTCASE_3(desc, name, nr) \
1032 print_testname(desc"/"#nr); \
1033 dotest(name##_spin_##nr, FAILURE, LOCKTYPE_SPIN); \
1034 dotest(name##_wlock_##nr, FAILURE, LOCKTYPE_RWLOCK); \
1035 dotest(name##_rlock_##nr, SUCCESS, LOCKTYPE_RWLOCK); \
1036 printk("\n");
1037
1038#define DO_TESTCASE_3RW(desc, name, nr) \
1039 print_testname(desc"/"#nr); \
1040 dotest(name##_spin_##nr, FAILURE, LOCKTYPE_SPIN|LOCKTYPE_RWLOCK);\
1041 dotest(name##_wlock_##nr, FAILURE, LOCKTYPE_RWLOCK); \
1042 dotest(name##_rlock_##nr, SUCCESS, LOCKTYPE_RWLOCK); \
1043 printk("\n");
1044
1045#define DO_TESTCASE_6(desc, name) \
1046 print_testname(desc); \
1047 dotest(name##_spin, FAILURE, LOCKTYPE_SPIN); \
1048 dotest(name##_wlock, FAILURE, LOCKTYPE_RWLOCK); \
1049 dotest(name##_rlock, FAILURE, LOCKTYPE_RWLOCK); \
1050 dotest(name##_mutex, FAILURE, LOCKTYPE_MUTEX); \
1051 dotest(name##_wsem, FAILURE, LOCKTYPE_RWSEM); \
1052 dotest(name##_rsem, FAILURE, LOCKTYPE_RWSEM); \
1053 printk("\n");
1054
1055#define DO_TESTCASE_6_SUCCESS(desc, name) \
1056 print_testname(desc); \
1057 dotest(name##_spin, SUCCESS, LOCKTYPE_SPIN); \
1058 dotest(name##_wlock, SUCCESS, LOCKTYPE_RWLOCK); \
1059 dotest(name##_rlock, SUCCESS, LOCKTYPE_RWLOCK); \
1060 dotest(name##_mutex, SUCCESS, LOCKTYPE_MUTEX); \
1061 dotest(name##_wsem, SUCCESS, LOCKTYPE_RWSEM); \
1062 dotest(name##_rsem, SUCCESS, LOCKTYPE_RWSEM); \
1063 printk("\n");
1064
1065
1066
1067
1068#define DO_TESTCASE_6R(desc, name) \
1069 print_testname(desc); \
1070 dotest(name##_spin, FAILURE, LOCKTYPE_SPIN); \
1071 dotest(name##_wlock, FAILURE, LOCKTYPE_RWLOCK); \
1072 dotest(name##_rlock, SUCCESS, LOCKTYPE_RWLOCK); \
1073 dotest(name##_mutex, FAILURE, LOCKTYPE_MUTEX); \
1074 dotest(name##_wsem, FAILURE, LOCKTYPE_RWSEM); \
1075 dotest(name##_rsem, FAILURE, LOCKTYPE_RWSEM); \
1076 printk("\n");
1077
1078#define DO_TESTCASE_2I(desc, name, nr) \
1079 DO_TESTCASE_1("hard-"desc, name##_hard, nr); \
1080 DO_TESTCASE_1("soft-"desc, name##_soft, nr);
1081
1082#define DO_TESTCASE_2IB(desc, name, nr) \
1083 DO_TESTCASE_1B("hard-"desc, name##_hard, nr); \
1084 DO_TESTCASE_1B("soft-"desc, name##_soft, nr);
1085
1086#define DO_TESTCASE_6I(desc, name, nr) \
1087 DO_TESTCASE_3("hard-"desc, name##_hard, nr); \
1088 DO_TESTCASE_3("soft-"desc, name##_soft, nr);
1089
1090#define DO_TESTCASE_6IRW(desc, name, nr) \
1091 DO_TESTCASE_3RW("hard-"desc, name##_hard, nr); \
1092 DO_TESTCASE_3RW("soft-"desc, name##_soft, nr);
1093
1094#define DO_TESTCASE_2x3(desc, name) \
1095 DO_TESTCASE_3(desc, name, 12); \
1096 DO_TESTCASE_3(desc, name, 21);
1097
1098#define DO_TESTCASE_2x6(desc, name) \
1099 DO_TESTCASE_6I(desc, name, 12); \
1100 DO_TESTCASE_6I(desc, name, 21);
1101
1102#define DO_TESTCASE_6x2(desc, name) \
1103 DO_TESTCASE_2I(desc, name, 123); \
1104 DO_TESTCASE_2I(desc, name, 132); \
1105 DO_TESTCASE_2I(desc, name, 213); \
1106 DO_TESTCASE_2I(desc, name, 231); \
1107 DO_TESTCASE_2I(desc, name, 312); \
1108 DO_TESTCASE_2I(desc, name, 321);
1109
1110#define DO_TESTCASE_6x2B(desc, name) \
1111 DO_TESTCASE_2IB(desc, name, 123); \
1112 DO_TESTCASE_2IB(desc, name, 132); \
1113 DO_TESTCASE_2IB(desc, name, 213); \
1114 DO_TESTCASE_2IB(desc, name, 231); \
1115 DO_TESTCASE_2IB(desc, name, 312); \
1116 DO_TESTCASE_2IB(desc, name, 321);
1117
1118#define DO_TESTCASE_6x6(desc, name) \
1119 DO_TESTCASE_6I(desc, name, 123); \
1120 DO_TESTCASE_6I(desc, name, 132); \
1121 DO_TESTCASE_6I(desc, name, 213); \
1122 DO_TESTCASE_6I(desc, name, 231); \
1123 DO_TESTCASE_6I(desc, name, 312); \
1124 DO_TESTCASE_6I(desc, name, 321);
1125
1126#define DO_TESTCASE_6x6RW(desc, name) \
1127 DO_TESTCASE_6IRW(desc, name, 123); \
1128 DO_TESTCASE_6IRW(desc, name, 132); \
1129 DO_TESTCASE_6IRW(desc, name, 213); \
1130 DO_TESTCASE_6IRW(desc, name, 231); \
1131 DO_TESTCASE_6IRW(desc, name, 312); \
1132 DO_TESTCASE_6IRW(desc, name, 321);
1133
1134static void ww_test_fail_acquire(void)
1135{
1136 int ret;
1137
1138 WWAI(&t);
1139 t.stamp++;
1140
1141 ret = WWL(&o, &t);
1142
1143 if (WARN_ON(!o.ctx) ||
1144 WARN_ON(ret))
1145 return;
1146
1147
1148 ret = WWL(&o, &t);
1149 WARN_ON(ret != -EALREADY);
1150
1151 ret = WWT(&o);
1152 WARN_ON(ret);
1153
1154 t2 = t;
1155 t2.stamp++;
1156 ret = WWL(&o, &t2);
1157 WARN_ON(ret != -EDEADLK);
1158 WWU(&o);
1159
1160 if (WWT(&o))
1161 WWU(&o);
1162#ifdef CONFIG_DEBUG_LOCK_ALLOC
1163 else
1164 DEBUG_LOCKS_WARN_ON(1);
1165#endif
1166}
1167
1168static void ww_test_normal(void)
1169{
1170 int ret;
1171
1172 WWAI(&t);
1173
1174
1175
1176
1177
1178
1179
1180
1181 o.ctx = (void *)~0UL;
1182 mutex_lock(&o.base);
1183 mutex_unlock(&o.base);
1184 WARN_ON(o.ctx != (void *)~0UL);
1185
1186
1187 o.ctx = (void *)~0UL;
1188 ret = mutex_lock_interruptible(&o.base);
1189 if (!ret)
1190 mutex_unlock(&o.base);
1191 else
1192 WARN_ON(1);
1193 WARN_ON(o.ctx != (void *)~0UL);
1194
1195
1196 o.ctx = (void *)~0UL;
1197 ret = mutex_lock_killable(&o.base);
1198 if (!ret)
1199 mutex_unlock(&o.base);
1200 else
1201 WARN_ON(1);
1202 WARN_ON(o.ctx != (void *)~0UL);
1203
1204
1205 o.ctx = (void *)~0UL;
1206 ret = mutex_trylock(&o.base);
1207 WARN_ON(!ret);
1208 if (ret)
1209 mutex_unlock(&o.base);
1210 else
1211 WARN_ON(1);
1212 WARN_ON(o.ctx != (void *)~0UL);
1213
1214
1215 o.ctx = (void *)~0UL;
1216 mutex_lock(&o.base);
1217 ret = mutex_trylock(&o.base);
1218 WARN_ON(ret);
1219 mutex_unlock(&o.base);
1220 WARN_ON(o.ctx != (void *)~0UL);
1221
1222
1223 o.ctx = (void *)~0UL;
1224 mutex_lock_nest_lock(&o.base, &t);
1225 mutex_unlock(&o.base);
1226 WARN_ON(o.ctx != (void *)~0UL);
1227}
1228
1229static void ww_test_two_contexts(void)
1230{
1231 WWAI(&t);
1232 WWAI(&t2);
1233}
1234
1235static void ww_test_diff_class(void)
1236{
1237 WWAI(&t);
1238#ifdef CONFIG_DEBUG_MUTEXES
1239 t.ww_class = NULL;
1240#endif
1241 WWL(&o, &t);
1242}
1243
1244static void ww_test_context_done_twice(void)
1245{
1246 WWAI(&t);
1247 WWAD(&t);
1248 WWAD(&t);
1249 WWAF(&t);
1250}
1251
1252static void ww_test_context_unlock_twice(void)
1253{
1254 WWAI(&t);
1255 WWAD(&t);
1256 WWAF(&t);
1257 WWAF(&t);
1258}
1259
1260static void ww_test_context_fini_early(void)
1261{
1262 WWAI(&t);
1263 WWL(&o, &t);
1264 WWAD(&t);
1265 WWAF(&t);
1266}
1267
1268static void ww_test_context_lock_after_done(void)
1269{
1270 WWAI(&t);
1271 WWAD(&t);
1272 WWL(&o, &t);
1273}
1274
1275static void ww_test_object_unlock_twice(void)
1276{
1277 WWL1(&o);
1278 WWU(&o);
1279 WWU(&o);
1280}
1281
1282static void ww_test_object_lock_unbalanced(void)
1283{
1284 WWAI(&t);
1285 WWL(&o, &t);
1286 t.acquired = 0;
1287 WWU(&o);
1288 WWAF(&t);
1289}
1290
1291static void ww_test_object_lock_stale_context(void)
1292{
1293 WWAI(&t);
1294 o.ctx = &t2;
1295 WWL(&o, &t);
1296}
1297
1298static void ww_test_edeadlk_normal(void)
1299{
1300 int ret;
1301
1302 mutex_lock(&o2.base);
1303 o2.ctx = &t2;
1304 mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
1305
1306 WWAI(&t);
1307 t2 = t;
1308 t2.stamp--;
1309
1310 ret = WWL(&o, &t);
1311 WARN_ON(ret);
1312
1313 ret = WWL(&o2, &t);
1314 WARN_ON(ret != -EDEADLK);
1315
1316 o2.ctx = NULL;
1317 mutex_acquire(&o2.base.dep_map, 0, 1, _THIS_IP_);
1318 mutex_unlock(&o2.base);
1319 WWU(&o);
1320
1321 WWL(&o2, &t);
1322}
1323
1324static void ww_test_edeadlk_normal_slow(void)
1325{
1326 int ret;
1327
1328 mutex_lock(&o2.base);
1329 mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
1330 o2.ctx = &t2;
1331
1332 WWAI(&t);
1333 t2 = t;
1334 t2.stamp--;
1335
1336 ret = WWL(&o, &t);
1337 WARN_ON(ret);
1338
1339 ret = WWL(&o2, &t);
1340 WARN_ON(ret != -EDEADLK);
1341
1342 o2.ctx = NULL;
1343 mutex_acquire(&o2.base.dep_map, 0, 1, _THIS_IP_);
1344 mutex_unlock(&o2.base);
1345 WWU(&o);
1346
1347 ww_mutex_lock_slow(&o2, &t);
1348}
1349
1350static void ww_test_edeadlk_no_unlock(void)
1351{
1352 int ret;
1353
1354 mutex_lock(&o2.base);
1355 o2.ctx = &t2;
1356 mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
1357
1358 WWAI(&t);
1359 t2 = t;
1360 t2.stamp--;
1361
1362 ret = WWL(&o, &t);
1363 WARN_ON(ret);
1364
1365 ret = WWL(&o2, &t);
1366 WARN_ON(ret != -EDEADLK);
1367
1368 o2.ctx = NULL;
1369 mutex_acquire(&o2.base.dep_map, 0, 1, _THIS_IP_);
1370 mutex_unlock(&o2.base);
1371
1372 WWL(&o2, &t);
1373}
1374
1375static void ww_test_edeadlk_no_unlock_slow(void)
1376{
1377 int ret;
1378
1379 mutex_lock(&o2.base);
1380 mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
1381 o2.ctx = &t2;
1382
1383 WWAI(&t);
1384 t2 = t;
1385 t2.stamp--;
1386
1387 ret = WWL(&o, &t);
1388 WARN_ON(ret);
1389
1390 ret = WWL(&o2, &t);
1391 WARN_ON(ret != -EDEADLK);
1392
1393 o2.ctx = NULL;
1394 mutex_acquire(&o2.base.dep_map, 0, 1, _THIS_IP_);
1395 mutex_unlock(&o2.base);
1396
1397 ww_mutex_lock_slow(&o2, &t);
1398}
1399
1400static void ww_test_edeadlk_acquire_more(void)
1401{
1402 int ret;
1403
1404 mutex_lock(&o2.base);
1405 mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
1406 o2.ctx = &t2;
1407
1408 WWAI(&t);
1409 t2 = t;
1410 t2.stamp--;
1411
1412 ret = WWL(&o, &t);
1413 WARN_ON(ret);
1414
1415 ret = WWL(&o2, &t);
1416 WARN_ON(ret != -EDEADLK);
1417
1418 ret = WWL(&o3, &t);
1419}
1420
1421static void ww_test_edeadlk_acquire_more_slow(void)
1422{
1423 int ret;
1424
1425 mutex_lock(&o2.base);
1426 mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
1427 o2.ctx = &t2;
1428
1429 WWAI(&t);
1430 t2 = t;
1431 t2.stamp--;
1432
1433 ret = WWL(&o, &t);
1434 WARN_ON(ret);
1435
1436 ret = WWL(&o2, &t);
1437 WARN_ON(ret != -EDEADLK);
1438
1439 ww_mutex_lock_slow(&o3, &t);
1440}
1441
1442static void ww_test_edeadlk_acquire_more_edeadlk(void)
1443{
1444 int ret;
1445
1446 mutex_lock(&o2.base);
1447 mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
1448 o2.ctx = &t2;
1449
1450 mutex_lock(&o3.base);
1451 mutex_release(&o3.base.dep_map, 1, _THIS_IP_);
1452 o3.ctx = &t2;
1453
1454 WWAI(&t);
1455 t2 = t;
1456 t2.stamp--;
1457
1458 ret = WWL(&o, &t);
1459 WARN_ON(ret);
1460
1461 ret = WWL(&o2, &t);
1462 WARN_ON(ret != -EDEADLK);
1463
1464 ret = WWL(&o3, &t);
1465 WARN_ON(ret != -EDEADLK);
1466}
1467
1468static void ww_test_edeadlk_acquire_more_edeadlk_slow(void)
1469{
1470 int ret;
1471
1472 mutex_lock(&o2.base);
1473 mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
1474 o2.ctx = &t2;
1475
1476 mutex_lock(&o3.base);
1477 mutex_release(&o3.base.dep_map, 1, _THIS_IP_);
1478 o3.ctx = &t2;
1479
1480 WWAI(&t);
1481 t2 = t;
1482 t2.stamp--;
1483
1484 ret = WWL(&o, &t);
1485 WARN_ON(ret);
1486
1487 ret = WWL(&o2, &t);
1488 WARN_ON(ret != -EDEADLK);
1489
1490 ww_mutex_lock_slow(&o3, &t);
1491}
1492
1493static void ww_test_edeadlk_acquire_wrong(void)
1494{
1495 int ret;
1496
1497 mutex_lock(&o2.base);
1498 mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
1499 o2.ctx = &t2;
1500
1501 WWAI(&t);
1502 t2 = t;
1503 t2.stamp--;
1504
1505 ret = WWL(&o, &t);
1506 WARN_ON(ret);
1507
1508 ret = WWL(&o2, &t);
1509 WARN_ON(ret != -EDEADLK);
1510 if (!ret)
1511 WWU(&o2);
1512
1513 WWU(&o);
1514
1515 ret = WWL(&o3, &t);
1516}
1517
1518static void ww_test_edeadlk_acquire_wrong_slow(void)
1519{
1520 int ret;
1521
1522 mutex_lock(&o2.base);
1523 mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
1524 o2.ctx = &t2;
1525
1526 WWAI(&t);
1527 t2 = t;
1528 t2.stamp--;
1529
1530 ret = WWL(&o, &t);
1531 WARN_ON(ret);
1532
1533 ret = WWL(&o2, &t);
1534 WARN_ON(ret != -EDEADLK);
1535 if (!ret)
1536 WWU(&o2);
1537
1538 WWU(&o);
1539
1540 ww_mutex_lock_slow(&o3, &t);
1541}
1542
1543static void ww_test_spin_nest_unlocked(void)
1544{
1545 raw_spin_lock_nest_lock(&lock_A, &o.base);
1546 U(A);
1547}
1548
1549static void ww_test_unneeded_slow(void)
1550{
1551 WWAI(&t);
1552
1553 ww_mutex_lock_slow(&o, &t);
1554}
1555
1556static void ww_test_context_block(void)
1557{
1558 int ret;
1559
1560 WWAI(&t);
1561
1562 ret = WWL(&o, &t);
1563 WARN_ON(ret);
1564 WWL1(&o2);
1565}
1566
1567static void ww_test_context_try(void)
1568{
1569 int ret;
1570
1571 WWAI(&t);
1572
1573 ret = WWL(&o, &t);
1574 WARN_ON(ret);
1575
1576 ret = WWT(&o2);
1577 WARN_ON(!ret);
1578 WWU(&o2);
1579 WWU(&o);
1580}
1581
1582static void ww_test_context_context(void)
1583{
1584 int ret;
1585
1586 WWAI(&t);
1587
1588 ret = WWL(&o, &t);
1589 WARN_ON(ret);
1590
1591 ret = WWL(&o2, &t);
1592 WARN_ON(ret);
1593
1594 WWU(&o2);
1595 WWU(&o);
1596}
1597
1598static void ww_test_try_block(void)
1599{
1600 bool ret;
1601
1602 ret = WWT(&o);
1603 WARN_ON(!ret);
1604
1605 WWL1(&o2);
1606 WWU(&o2);
1607 WWU(&o);
1608}
1609
1610static void ww_test_try_try(void)
1611{
1612 bool ret;
1613
1614 ret = WWT(&o);
1615 WARN_ON(!ret);
1616 ret = WWT(&o2);
1617 WARN_ON(!ret);
1618 WWU(&o2);
1619 WWU(&o);
1620}
1621
1622static void ww_test_try_context(void)
1623{
1624 int ret;
1625
1626 ret = WWT(&o);
1627 WARN_ON(!ret);
1628
1629 WWAI(&t);
1630
1631 ret = WWL(&o2, &t);
1632 WARN_ON(ret);
1633}
1634
1635static void ww_test_block_block(void)
1636{
1637 WWL1(&o);
1638 WWL1(&o2);
1639}
1640
1641static void ww_test_block_try(void)
1642{
1643 bool ret;
1644
1645 WWL1(&o);
1646 ret = WWT(&o2);
1647 WARN_ON(!ret);
1648}
1649
1650static void ww_test_block_context(void)
1651{
1652 int ret;
1653
1654 WWL1(&o);
1655 WWAI(&t);
1656
1657 ret = WWL(&o2, &t);
1658 WARN_ON(ret);
1659}
1660
1661static void ww_test_spin_block(void)
1662{
1663 L(A);
1664 U(A);
1665
1666 WWL1(&o);
1667 L(A);
1668 U(A);
1669 WWU(&o);
1670
1671 L(A);
1672 WWL1(&o);
1673 WWU(&o);
1674 U(A);
1675}
1676
1677static void ww_test_spin_try(void)
1678{
1679 bool ret;
1680
1681 L(A);
1682 U(A);
1683
1684 ret = WWT(&o);
1685 WARN_ON(!ret);
1686 L(A);
1687 U(A);
1688 WWU(&o);
1689
1690 L(A);
1691 ret = WWT(&o);
1692 WARN_ON(!ret);
1693 WWU(&o);
1694 U(A);
1695}
1696
1697static void ww_test_spin_context(void)
1698{
1699 int ret;
1700
1701 L(A);
1702 U(A);
1703
1704 WWAI(&t);
1705
1706 ret = WWL(&o, &t);
1707 WARN_ON(ret);
1708 L(A);
1709 U(A);
1710 WWU(&o);
1711
1712 L(A);
1713 ret = WWL(&o, &t);
1714 WARN_ON(ret);
1715 WWU(&o);
1716 U(A);
1717}
1718
1719static void ww_tests(void)
1720{
1721 printk(" --------------------------------------------------------------------------\n");
1722 printk(" | Wound/wait tests |\n");
1723 printk(" ---------------------\n");
1724
1725 print_testname("ww api failures");
1726 dotest(ww_test_fail_acquire, SUCCESS, LOCKTYPE_WW);
1727 dotest(ww_test_normal, SUCCESS, LOCKTYPE_WW);
1728 dotest(ww_test_unneeded_slow, FAILURE, LOCKTYPE_WW);
1729 printk("\n");
1730
1731 print_testname("ww contexts mixing");
1732 dotest(ww_test_two_contexts, FAILURE, LOCKTYPE_WW);
1733 dotest(ww_test_diff_class, FAILURE, LOCKTYPE_WW);
1734 printk("\n");
1735
1736 print_testname("finishing ww context");
1737 dotest(ww_test_context_done_twice, FAILURE, LOCKTYPE_WW);
1738 dotest(ww_test_context_unlock_twice, FAILURE, LOCKTYPE_WW);
1739 dotest(ww_test_context_fini_early, FAILURE, LOCKTYPE_WW);
1740 dotest(ww_test_context_lock_after_done, FAILURE, LOCKTYPE_WW);
1741 printk("\n");
1742
1743 print_testname("locking mismatches");
1744 dotest(ww_test_object_unlock_twice, FAILURE, LOCKTYPE_WW);
1745 dotest(ww_test_object_lock_unbalanced, FAILURE, LOCKTYPE_WW);
1746 dotest(ww_test_object_lock_stale_context, FAILURE, LOCKTYPE_WW);
1747 printk("\n");
1748
1749 print_testname("EDEADLK handling");
1750 dotest(ww_test_edeadlk_normal, SUCCESS, LOCKTYPE_WW);
1751 dotest(ww_test_edeadlk_normal_slow, SUCCESS, LOCKTYPE_WW);
1752 dotest(ww_test_edeadlk_no_unlock, FAILURE, LOCKTYPE_WW);
1753 dotest(ww_test_edeadlk_no_unlock_slow, FAILURE, LOCKTYPE_WW);
1754 dotest(ww_test_edeadlk_acquire_more, FAILURE, LOCKTYPE_WW);
1755 dotest(ww_test_edeadlk_acquire_more_slow, FAILURE, LOCKTYPE_WW);
1756 dotest(ww_test_edeadlk_acquire_more_edeadlk, FAILURE, LOCKTYPE_WW);
1757 dotest(ww_test_edeadlk_acquire_more_edeadlk_slow, FAILURE, LOCKTYPE_WW);
1758 dotest(ww_test_edeadlk_acquire_wrong, FAILURE, LOCKTYPE_WW);
1759 dotest(ww_test_edeadlk_acquire_wrong_slow, FAILURE, LOCKTYPE_WW);
1760 printk("\n");
1761
1762 print_testname("spinlock nest unlocked");
1763 dotest(ww_test_spin_nest_unlocked, FAILURE, LOCKTYPE_WW);
1764 printk("\n");
1765
1766 printk(" -----------------------------------------------------\n");
1767 printk(" |block | try |context|\n");
1768 printk(" -----------------------------------------------------\n");
1769
1770 print_testname("context");
1771 dotest(ww_test_context_block, FAILURE, LOCKTYPE_WW);
1772 dotest(ww_test_context_try, SUCCESS, LOCKTYPE_WW);
1773 dotest(ww_test_context_context, SUCCESS, LOCKTYPE_WW);
1774 printk("\n");
1775
1776 print_testname("try");
1777 dotest(ww_test_try_block, FAILURE, LOCKTYPE_WW);
1778 dotest(ww_test_try_try, SUCCESS, LOCKTYPE_WW);
1779 dotest(ww_test_try_context, FAILURE, LOCKTYPE_WW);
1780 printk("\n");
1781
1782 print_testname("block");
1783 dotest(ww_test_block_block, FAILURE, LOCKTYPE_WW);
1784 dotest(ww_test_block_try, SUCCESS, LOCKTYPE_WW);
1785 dotest(ww_test_block_context, FAILURE, LOCKTYPE_WW);
1786 printk("\n");
1787
1788 print_testname("spinlock");
1789 dotest(ww_test_spin_block, FAILURE, LOCKTYPE_WW);
1790 dotest(ww_test_spin_try, SUCCESS, LOCKTYPE_WW);
1791 dotest(ww_test_spin_context, FAILURE, LOCKTYPE_WW);
1792 printk("\n");
1793}
1794
1795void locking_selftest(void)
1796{
1797
1798
1799
1800 if (!debug_locks) {
1801 printk("----------------------------------\n");
1802 printk("| Locking API testsuite disabled |\n");
1803 printk("----------------------------------\n");
1804 return;
1805 }
1806
1807
1808
1809
1810 printk("------------------------\n");
1811 printk("| Locking API testsuite:\n");
1812 printk("----------------------------------------------------------------------------\n");
1813 printk(" | spin |wlock |rlock |mutex | wsem | rsem |\n");
1814 printk(" --------------------------------------------------------------------------\n");
1815
1816 init_shared_classes();
1817 debug_locks_silent = !debug_locks_verbose;
1818
1819 DO_TESTCASE_6R("A-A deadlock", AA);
1820 DO_TESTCASE_6R("A-B-B-A deadlock", ABBA);
1821 DO_TESTCASE_6R("A-B-B-C-C-A deadlock", ABBCCA);
1822 DO_TESTCASE_6R("A-B-C-A-B-C deadlock", ABCABC);
1823 DO_TESTCASE_6R("A-B-B-C-C-D-D-A deadlock", ABBCCDDA);
1824 DO_TESTCASE_6R("A-B-C-D-B-D-D-A deadlock", ABCDBDDA);
1825 DO_TESTCASE_6R("A-B-C-D-B-C-D-A deadlock", ABCDBCDA);
1826 DO_TESTCASE_6("double unlock", double_unlock);
1827 DO_TESTCASE_6("initialize held", init_held);
1828 DO_TESTCASE_6_SUCCESS("bad unlock order", bad_unlock_order);
1829
1830 printk(" --------------------------------------------------------------------------\n");
1831 print_testname("recursive read-lock");
1832 printk(" |");
1833 dotest(rlock_AA1, SUCCESS, LOCKTYPE_RWLOCK);
1834 printk(" |");
1835 dotest(rsem_AA1, FAILURE, LOCKTYPE_RWSEM);
1836 printk("\n");
1837
1838 print_testname("recursive read-lock #2");
1839 printk(" |");
1840 dotest(rlock_AA1B, SUCCESS, LOCKTYPE_RWLOCK);
1841 printk(" |");
1842 dotest(rsem_AA1B, FAILURE, LOCKTYPE_RWSEM);
1843 printk("\n");
1844
1845 print_testname("mixed read-write-lock");
1846 printk(" |");
1847 dotest(rlock_AA2, FAILURE, LOCKTYPE_RWLOCK);
1848 printk(" |");
1849 dotest(rsem_AA2, FAILURE, LOCKTYPE_RWSEM);
1850 printk("\n");
1851
1852 print_testname("mixed write-read-lock");
1853 printk(" |");
1854 dotest(rlock_AA3, FAILURE, LOCKTYPE_RWLOCK);
1855 printk(" |");
1856 dotest(rsem_AA3, FAILURE, LOCKTYPE_RWSEM);
1857 printk("\n");
1858
1859 printk(" --------------------------------------------------------------------------\n");
1860
1861
1862
1863
1864 DO_TESTCASE_2x6("irqs-on + irq-safe-A", irqsafe1);
1865 DO_TESTCASE_2x3("sirq-safe-A => hirqs-on", irqsafe2A);
1866 DO_TESTCASE_2x6("safe-A + irqs-on", irqsafe2B);
1867 DO_TESTCASE_6x6("safe-A + unsafe-B #1", irqsafe3);
1868 DO_TESTCASE_6x6("safe-A + unsafe-B #2", irqsafe4);
1869 DO_TESTCASE_6x6RW("irq lock-inversion", irq_inversion);
1870
1871 DO_TESTCASE_6x2("irq read-recursion", irq_read_recursion);
1872
1873
1874 ww_tests();
1875
1876 if (unexpected_testcase_failures) {
1877 printk("-----------------------------------------------------------------\n");
1878 debug_locks = 0;
1879 printk("BUG: %3d unexpected failures (out of %3d) - debugging disabled! |\n",
1880 unexpected_testcase_failures, testcase_total);
1881 printk("-----------------------------------------------------------------\n");
1882 } else if (expected_testcase_failures && testcase_successes) {
1883 printk("--------------------------------------------------------\n");
1884 printk("%3d out of %3d testcases failed, as expected. |\n",
1885 expected_testcase_failures, testcase_total);
1886 printk("----------------------------------------------------\n");
1887 debug_locks = 1;
1888 } else if (expected_testcase_failures && !testcase_successes) {
1889 printk("--------------------------------------------------------\n");
1890 printk("All %3d testcases failed, as expected. |\n",
1891 expected_testcase_failures);
1892 printk("----------------------------------------\n");
1893 debug_locks = 1;
1894 } else {
1895 printk("-------------------------------------------------------\n");
1896 printk("Good, all %3d testcases passed! |\n",
1897 testcase_successes);
1898 printk("---------------------------------\n");
1899 debug_locks = 1;
1900 }
1901 debug_locks_silent = 0;
1902}
1903
