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lockdep: Take read/write status in consideration when generate chainkey
[linux-block.git] / lib / locking-selftest.c
CommitLineData
b2441318 1// SPDX-License-Identifier: GPL-2.0
cae2ed9a
IM		 2/*
3 * lib/locking-selftest.c
4 *
5 * Testsuite for various locking APIs: spinlocks, rwlocks,
6 * mutexes and rw-semaphores.
7 *
8 * It is checking both false positives and false negatives.
9 *
10 * Started by Ingo Molnar:
11 *
12 * Copyright (C) 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
13 */
14#include <linux/rwsem.h>
15#include <linux/mutex.h>
1b375dc3 16#include <linux/ww_mutex.h>
cae2ed9a
IM		 17#include <linux/sched.h>
18#include <linux/delay.h>
fbb9ce95 19#include <linux/lockdep.h>
cae2ed9a
IM		 20#include <linux/spinlock.h>
21#include <linux/kallsyms.h>
22#include <linux/interrupt.h>
23#include <linux/debug_locks.h>
24#include <linux/irqflags.h>
018956d6 25#include <linux/rtmutex.h>
cae2ed9a
IM		 26
27/*
28 * Change this to 1 if you want to see the failure printouts:
29 */
30static unsigned int debug_locks_verbose;
e9181886 31unsigned int force_read_lock_recursive;
cae2ed9a 32
08295b3b 33static DEFINE_WD_CLASS(ww_lockdep);
1de99445 34
cae2ed9a
IM		 35static int __init setup_debug_locks_verbose(char *str)
36{
37 get_option(&str, &debug_locks_verbose);
38
39 return 1;
40}
41
42__setup("debug_locks_verbose=", setup_debug_locks_verbose);
43
44#define FAILURE 0
45#define SUCCESS 1
46
47#define LOCKTYPE_SPIN 0x1
48#define LOCKTYPE_RWLOCK 0x2
49#define LOCKTYPE_MUTEX 0x4
50#define LOCKTYPE_RWSEM 0x8
1de99445 51#define LOCKTYPE_WW 0x10
018956d6 52#define LOCKTYPE_RTMUTEX 0x20
1de99445
ML		 53
54static struct ww_acquire_ctx t, t2;
f3cf139e 55static struct ww_mutex o, o2, o3;
cae2ed9a
IM		 56
57/*
58 * Normal standalone locks, for the circular and irq-context
59 * dependency tests:
60 */
9fb1b90c
YZ		 61static DEFINE_RAW_SPINLOCK(lock_A);
62static DEFINE_RAW_SPINLOCK(lock_B);
63static DEFINE_RAW_SPINLOCK(lock_C);
64static DEFINE_RAW_SPINLOCK(lock_D);
cae2ed9a
IM		 65
66static DEFINE_RWLOCK(rwlock_A);
67static DEFINE_RWLOCK(rwlock_B);
68static DEFINE_RWLOCK(rwlock_C);
69static DEFINE_RWLOCK(rwlock_D);
70
71static DEFINE_MUTEX(mutex_A);
72static DEFINE_MUTEX(mutex_B);
73static DEFINE_MUTEX(mutex_C);
74static DEFINE_MUTEX(mutex_D);
75
76static DECLARE_RWSEM(rwsem_A);
77static DECLARE_RWSEM(rwsem_B);
78static DECLARE_RWSEM(rwsem_C);
79static DECLARE_RWSEM(rwsem_D);
80
018956d6
PZ		 81#ifdef CONFIG_RT_MUTEXES
82
83static DEFINE_RT_MUTEX(rtmutex_A);
84static DEFINE_RT_MUTEX(rtmutex_B);
85static DEFINE_RT_MUTEX(rtmutex_C);
86static DEFINE_RT_MUTEX(rtmutex_D);
87
88#endif
89
cae2ed9a
IM		 90/*
91 * Locks that we initialize dynamically as well so that
92 * e.g. X1 and X2 becomes two instances of the same class,
93 * but X* and Y* are different classes. We do this so that
94 * we do not trigger a real lockup:
95 */
9fb1b90c
YZ		 96static DEFINE_RAW_SPINLOCK(lock_X1);
97static DEFINE_RAW_SPINLOCK(lock_X2);
98static DEFINE_RAW_SPINLOCK(lock_Y1);
99static DEFINE_RAW_SPINLOCK(lock_Y2);
100static DEFINE_RAW_SPINLOCK(lock_Z1);
101static DEFINE_RAW_SPINLOCK(lock_Z2);
cae2ed9a
IM		 102
103static DEFINE_RWLOCK(rwlock_X1);
104static DEFINE_RWLOCK(rwlock_X2);
105static DEFINE_RWLOCK(rwlock_Y1);
106static DEFINE_RWLOCK(rwlock_Y2);
107static DEFINE_RWLOCK(rwlock_Z1);
108static DEFINE_RWLOCK(rwlock_Z2);
109
110static DEFINE_MUTEX(mutex_X1);
111static DEFINE_MUTEX(mutex_X2);
112static DEFINE_MUTEX(mutex_Y1);
113static DEFINE_MUTEX(mutex_Y2);
114static DEFINE_MUTEX(mutex_Z1);
115static DEFINE_MUTEX(mutex_Z2);
116
117static DECLARE_RWSEM(rwsem_X1);
118static DECLARE_RWSEM(rwsem_X2);
119static DECLARE_RWSEM(rwsem_Y1);
120static DECLARE_RWSEM(rwsem_Y2);
121static DECLARE_RWSEM(rwsem_Z1);
122static DECLARE_RWSEM(rwsem_Z2);
123
018956d6
PZ		 124#ifdef CONFIG_RT_MUTEXES
125
126static DEFINE_RT_MUTEX(rtmutex_X1);
127static DEFINE_RT_MUTEX(rtmutex_X2);
128static DEFINE_RT_MUTEX(rtmutex_Y1);
129static DEFINE_RT_MUTEX(rtmutex_Y2);
130static DEFINE_RT_MUTEX(rtmutex_Z1);
131static DEFINE_RT_MUTEX(rtmutex_Z2);
132
133#endif
134
cae2ed9a
IM		 135/*
136 * non-inlined runtime initializers, to let separate locks share
137 * the same lock-class:
138 */
139#define INIT_CLASS_FUNC(class) \
140static noinline void \
9fb1b90c
YZ		 141init_class_##class(raw_spinlock_t *lock, rwlock_t *rwlock, \
142 struct mutex *mutex, struct rw_semaphore *rwsem)\
cae2ed9a 143{ \
9fb1b90c 144 raw_spin_lock_init(lock); \
cae2ed9a
IM		 145 rwlock_init(rwlock); \
146 mutex_init(mutex); \
147 init_rwsem(rwsem); \
148}
149
150INIT_CLASS_FUNC(X)
151INIT_CLASS_FUNC(Y)
152INIT_CLASS_FUNC(Z)
153
154static void init_shared_classes(void)
155{
018956d6
PZ		 156#ifdef CONFIG_RT_MUTEXES
157 static struct lock_class_key rt_X, rt_Y, rt_Z;
158
159 __rt_mutex_init(&rtmutex_X1, __func__, &rt_X);
160 __rt_mutex_init(&rtmutex_X2, __func__, &rt_X);
161 __rt_mutex_init(&rtmutex_Y1, __func__, &rt_Y);
162 __rt_mutex_init(&rtmutex_Y2, __func__, &rt_Y);
163 __rt_mutex_init(&rtmutex_Z1, __func__, &rt_Z);
164 __rt_mutex_init(&rtmutex_Z2, __func__, &rt_Z);
165#endif
166
cae2ed9a
IM		 167 init_class_X(&lock_X1, &rwlock_X1, &mutex_X1, &rwsem_X1);
168 init_class_X(&lock_X2, &rwlock_X2, &mutex_X2, &rwsem_X2);
169
170 init_class_Y(&lock_Y1, &rwlock_Y1, &mutex_Y1, &rwsem_Y1);
171 init_class_Y(&lock_Y2, &rwlock_Y2, &mutex_Y2, &rwsem_Y2);
172
173 init_class_Z(&lock_Z1, &rwlock_Z1, &mutex_Z1, &rwsem_Z1);
174 init_class_Z(&lock_Z2, &rwlock_Z2, &mutex_Z2, &rwsem_Z2);
175}
176
177/*
178 * For spinlocks and rwlocks we also do hardirq-safe / softirq-safe tests.
179 * The following functions use a lock from a simulated hardirq/softirq
180 * context, causing the locks to be marked as hardirq-safe/softirq-safe:
181 */
182
183#define HARDIRQ_DISABLE local_irq_disable
184#define HARDIRQ_ENABLE local_irq_enable
185
186#define HARDIRQ_ENTER() \
187 local_irq_disable(); \
ba9f207c 188 __irq_enter(); \
cae2ed9a
IM		 189 WARN_ON(!in_irq());
190
191#define HARDIRQ_EXIT() \
192 __irq_exit(); \
193 local_irq_enable();
194
195#define SOFTIRQ_DISABLE local_bh_disable
196#define SOFTIRQ_ENABLE local_bh_enable
197
198#define SOFTIRQ_ENTER() \
199 local_bh_disable(); \
200 local_irq_disable(); \
d820ac4c 201 lockdep_softirq_enter(); \
cae2ed9a
IM		 202 WARN_ON(!in_softirq());
203
204#define SOFTIRQ_EXIT() \
d820ac4c 205 lockdep_softirq_exit(); \
cae2ed9a
IM		 206 local_irq_enable(); \
207 local_bh_enable();
208
209/*
210 * Shortcuts for lock/unlock API variants, to keep
211 * the testcases compact:
212 */
9fb1b90c
YZ		 213#define L(x) raw_spin_lock(&lock_##x)
214#define U(x) raw_spin_unlock(&lock_##x)
cae2ed9a 215#define LU(x) L(x); U(x)
9fb1b90c 216#define SI(x) raw_spin_lock_init(&lock_##x)
cae2ed9a
IM		 217
218#define WL(x) write_lock(&rwlock_##x)
219#define WU(x) write_unlock(&rwlock_##x)
220#define WLU(x) WL(x); WU(x)
221
222#define RL(x) read_lock(&rwlock_##x)
223#define RU(x) read_unlock(&rwlock_##x)
224#define RLU(x) RL(x); RU(x)
225#define RWI(x) rwlock_init(&rwlock_##x)
226
227#define ML(x) mutex_lock(&mutex_##x)
228#define MU(x) mutex_unlock(&mutex_##x)
229#define MI(x) mutex_init(&mutex_##x)
230
018956d6
PZ		 231#define RTL(x) rt_mutex_lock(&rtmutex_##x)
232#define RTU(x) rt_mutex_unlock(&rtmutex_##x)
233#define RTI(x) rt_mutex_init(&rtmutex_##x)
234
cae2ed9a
IM		 235#define WSL(x) down_write(&rwsem_##x)
236#define WSU(x) up_write(&rwsem_##x)
237
238#define RSL(x) down_read(&rwsem_##x)
239#define RSU(x) up_read(&rwsem_##x)
240#define RWSI(x) init_rwsem(&rwsem_##x)
241
1de99445
ML		 242#ifndef CONFIG_DEBUG_WW_MUTEX_SLOWPATH
243#define WWAI(x) ww_acquire_init(x, &ww_lockdep)
244#else
245#define WWAI(x) do { ww_acquire_init(x, &ww_lockdep); (x)->deadlock_inject_countdown = ~0U; } while (0)
246#endif
247#define WWAD(x) ww_acquire_done(x)
248#define WWAF(x) ww_acquire_fini(x)
249
250#define WWL(x, c) ww_mutex_lock(x, c)
251#define WWT(x) ww_mutex_trylock(x)
252#define WWL1(x) ww_mutex_lock(x, NULL)
253#define WWU(x) ww_mutex_unlock(x)
254
255
cae2ed9a
IM		 256#define LOCK_UNLOCK_2(x,y) LOCK(x); LOCK(y); UNLOCK(y); UNLOCK(x)
257
258/*
259 * Generate different permutations of the same testcase, using
260 * the same basic lock-dependency/state events:
261 */
262
263#define GENERATE_TESTCASE(name) \
264 \
265static void name(void) { E(); }
266
267#define GENERATE_PERMUTATIONS_2_EVENTS(name) \
268 \
269static void name##_12(void) { E1(); E2(); } \
270static void name##_21(void) { E2(); E1(); }
271
272#define GENERATE_PERMUTATIONS_3_EVENTS(name) \
273 \
274static void name##_123(void) { E1(); E2(); E3(); } \
275static void name##_132(void) { E1(); E3(); E2(); } \
276static void name##_213(void) { E2(); E1(); E3(); } \
277static void name##_231(void) { E2(); E3(); E1(); } \
278static void name##_312(void) { E3(); E1(); E2(); } \
279static void name##_321(void) { E3(); E2(); E1(); }
280
281/*
282 * AA deadlock:
283 */
284
285#define E() \
286 \
287 LOCK(X1); \
288 LOCK(X2); /* this one should fail */
289
290/*
291 * 6 testcases:
292 */
293#include "locking-selftest-spin.h"
294GENERATE_TESTCASE(AA_spin)
295#include "locking-selftest-wlock.h"
296GENERATE_TESTCASE(AA_wlock)
297#include "locking-selftest-rlock.h"
298GENERATE_TESTCASE(AA_rlock)
299#include "locking-selftest-mutex.h"
300GENERATE_TESTCASE(AA_mutex)
301#include "locking-selftest-wsem.h"
302GENERATE_TESTCASE(AA_wsem)
303#include "locking-selftest-rsem.h"
304GENERATE_TESTCASE(AA_rsem)
305
018956d6
PZ		 306#ifdef CONFIG_RT_MUTEXES
307#include "locking-selftest-rtmutex.h"
308GENERATE_TESTCASE(AA_rtmutex);
309#endif
310
cae2ed9a
IM		 311#undef E
312
313/*
314 * Special-case for read-locking, they are
6c9076ec 315 * allowed to recurse on the same lock class:
cae2ed9a
IM		 316 */
317static void rlock_AA1(void)
318{
319 RL(X1);
320 RL(X1); // this one should NOT fail
321}
322
323static void rlock_AA1B(void)
324{
325 RL(X1);
6c9076ec 326 RL(X2); // this one should NOT fail
cae2ed9a
IM		 327}
328
329static void rsem_AA1(void)
330{
331 RSL(X1);
332 RSL(X1); // this one should fail
333}
334
335static void rsem_AA1B(void)
336{
337 RSL(X1);
338 RSL(X2); // this one should fail
339}
340/*
341 * The mixing of read and write locks is not allowed:
342 */
343static void rlock_AA2(void)
344{
345 RL(X1);
346 WL(X2); // this one should fail
347}
348
349static void rsem_AA2(void)
350{
351 RSL(X1);
352 WSL(X2); // this one should fail
353}
354
355static void rlock_AA3(void)
356{
357 WL(X1);
358 RL(X2); // this one should fail
359}
360
361static void rsem_AA3(void)
362{
363 WSL(X1);
364 RSL(X2); // this one should fail
365}
366
e9149858
PZ		 367/*
368 * read_lock(A)
369 * spin_lock(B)
370 * spin_lock(B)
371 * write_lock(A)
372 */
373static void rlock_ABBA1(void)
374{
375 RL(X1);
376 L(Y1);
377 U(Y1);
378 RU(X1);
379
380 L(Y1);
381 WL(X1);
382 WU(X1);
383 U(Y1); // should fail
384}
385
386static void rwsem_ABBA1(void)
387{
388 RSL(X1);
389 ML(Y1);
390 MU(Y1);
391 RSU(X1);
392
393 ML(Y1);
394 WSL(X1);
395 WSU(X1);
396 MU(Y1); // should fail
397}
398
d4f200e5
BF		 399/*
400 * read_lock(A)
401 * spin_lock(B)
402 * spin_lock(B)
403 * write_lock(A)
404 *
405 * This test case is aimed at poking whether the chain cache prevents us from
406 * detecting a read-lock/lock-write deadlock: if the chain cache doesn't differ
407 * read/write locks, the following case may happen
408 *
409 * { read_lock(A)->lock(B) dependency exists }
410 *
411 * P0:
412 * lock(B);
413 * read_lock(A);
414 *
415 * { Not a deadlock, B -> A is added in the chain cache }
416 *
417 * P1:
418 * lock(B);
419 * write_lock(A);
420 *
421 * { B->A found in chain cache, not reported as a deadlock }
422 *
423 */
424static void rlock_chaincache_ABBA1(void)
425{
426 RL(X1);
427 L(Y1);
428 U(Y1);
429 RU(X1);
430
431 L(Y1);
432 RL(X1);
433 RU(X1);
434 U(Y1);
435
436 L(Y1);
437 WL(X1);
438 WU(X1);
439 U(Y1); // should fail
440}
441
e9149858
PZ		 442/*
443 * read_lock(A)
444 * spin_lock(B)
445 * spin_lock(B)
446 * read_lock(A)
447 */
448static void rlock_ABBA2(void)
449{
450 RL(X1);
451 L(Y1);
452 U(Y1);
453 RU(X1);
454
455 L(Y1);
456 RL(X1);
457 RU(X1);
458 U(Y1); // should NOT fail
459}
460
461static void rwsem_ABBA2(void)
462{
463 RSL(X1);
464 ML(Y1);
465 MU(Y1);
466 RSU(X1);
467
468 ML(Y1);
469 RSL(X1);
470 RSU(X1);
471 MU(Y1); // should fail
472}
473
474
475/*
476 * write_lock(A)
477 * spin_lock(B)
478 * spin_lock(B)
479 * write_lock(A)
480 */
481static void rlock_ABBA3(void)
482{
483 WL(X1);
484 L(Y1);
485 U(Y1);
486 WU(X1);
487
488 L(Y1);
489 WL(X1);
490 WU(X1);
491 U(Y1); // should fail
492}
493
494static void rwsem_ABBA3(void)
495{
496 WSL(X1);
497 ML(Y1);
498 MU(Y1);
499 WSU(X1);
500
501 ML(Y1);
502 WSL(X1);
503 WSU(X1);
504 MU(Y1); // should fail
505}
506
cae2ed9a
IM		 507/*
508 * ABBA deadlock:
509 */
510
511#define E() \
512 \
513 LOCK_UNLOCK_2(A, B); \
514 LOCK_UNLOCK_2(B, A); /* fail */
515
516/*
517 * 6 testcases:
518 */
519#include "locking-selftest-spin.h"
520GENERATE_TESTCASE(ABBA_spin)
521#include "locking-selftest-wlock.h"
522GENERATE_TESTCASE(ABBA_wlock)
523#include "locking-selftest-rlock.h"
524GENERATE_TESTCASE(ABBA_rlock)
525#include "locking-selftest-mutex.h"
526GENERATE_TESTCASE(ABBA_mutex)
527#include "locking-selftest-wsem.h"
528GENERATE_TESTCASE(ABBA_wsem)
529#include "locking-selftest-rsem.h"
530GENERATE_TESTCASE(ABBA_rsem)
531
018956d6
PZ		 532#ifdef CONFIG_RT_MUTEXES
533#include "locking-selftest-rtmutex.h"
534GENERATE_TESTCASE(ABBA_rtmutex);
535#endif
536
cae2ed9a
IM		 537#undef E
538
539/*
540 * AB BC CA deadlock:
541 */
542
543#define E() \
544 \
545 LOCK_UNLOCK_2(A, B); \
546 LOCK_UNLOCK_2(B, C); \
547 LOCK_UNLOCK_2(C, A); /* fail */
548
549/*
550 * 6 testcases:
551 */
552#include "locking-selftest-spin.h"
553GENERATE_TESTCASE(ABBCCA_spin)
554#include "locking-selftest-wlock.h"
555GENERATE_TESTCASE(ABBCCA_wlock)
556#include "locking-selftest-rlock.h"
557GENERATE_TESTCASE(ABBCCA_rlock)
558#include "locking-selftest-mutex.h"
559GENERATE_TESTCASE(ABBCCA_mutex)
560#include "locking-selftest-wsem.h"
561GENERATE_TESTCASE(ABBCCA_wsem)
562#include "locking-selftest-rsem.h"
563GENERATE_TESTCASE(ABBCCA_rsem)
564
018956d6
PZ		 565#ifdef CONFIG_RT_MUTEXES
566#include "locking-selftest-rtmutex.h"
567GENERATE_TESTCASE(ABBCCA_rtmutex);
568#endif
569
cae2ed9a
IM		 570#undef E
571
572/*
573 * AB CA BC deadlock:
574 */
575
576#define E() \
577 \
578 LOCK_UNLOCK_2(A, B); \
579 LOCK_UNLOCK_2(C, A); \
580 LOCK_UNLOCK_2(B, C); /* fail */
581
582/*
583 * 6 testcases:
584 */
585#include "locking-selftest-spin.h"
586GENERATE_TESTCASE(ABCABC_spin)
587#include "locking-selftest-wlock.h"
588GENERATE_TESTCASE(ABCABC_wlock)
589#include "locking-selftest-rlock.h"
590GENERATE_TESTCASE(ABCABC_rlock)
591#include "locking-selftest-mutex.h"
592GENERATE_TESTCASE(ABCABC_mutex)
593#include "locking-selftest-wsem.h"
594GENERATE_TESTCASE(ABCABC_wsem)
595#include "locking-selftest-rsem.h"
596GENERATE_TESTCASE(ABCABC_rsem)
597
018956d6
PZ		 598#ifdef CONFIG_RT_MUTEXES
599#include "locking-selftest-rtmutex.h"
600GENERATE_TESTCASE(ABCABC_rtmutex);
601#endif
602
cae2ed9a
IM		 603#undef E
604
605/*
606 * AB BC CD DA deadlock:
607 */
608
609#define E() \
610 \
611 LOCK_UNLOCK_2(A, B); \
612 LOCK_UNLOCK_2(B, C); \
613 LOCK_UNLOCK_2(C, D); \
614 LOCK_UNLOCK_2(D, A); /* fail */
615
616/*
617 * 6 testcases:
618 */
619#include "locking-selftest-spin.h"
620GENERATE_TESTCASE(ABBCCDDA_spin)
621#include "locking-selftest-wlock.h"
622GENERATE_TESTCASE(ABBCCDDA_wlock)
623#include "locking-selftest-rlock.h"
624GENERATE_TESTCASE(ABBCCDDA_rlock)
625#include "locking-selftest-mutex.h"
626GENERATE_TESTCASE(ABBCCDDA_mutex)
627#include "locking-selftest-wsem.h"
628GENERATE_TESTCASE(ABBCCDDA_wsem)
629#include "locking-selftest-rsem.h"
630GENERATE_TESTCASE(ABBCCDDA_rsem)
631
018956d6
PZ		 632#ifdef CONFIG_RT_MUTEXES
633#include "locking-selftest-rtmutex.h"
634GENERATE_TESTCASE(ABBCCDDA_rtmutex);
635#endif
636
cae2ed9a
IM		 637#undef E
638
639/*
640 * AB CD BD DA deadlock:
641 */
642#define E() \
643 \
644 LOCK_UNLOCK_2(A, B); \
645 LOCK_UNLOCK_2(C, D); \
646 LOCK_UNLOCK_2(B, D); \
647 LOCK_UNLOCK_2(D, A); /* fail */
648
649/*
650 * 6 testcases:
651 */
652#include "locking-selftest-spin.h"
653GENERATE_TESTCASE(ABCDBDDA_spin)
654#include "locking-selftest-wlock.h"
655GENERATE_TESTCASE(ABCDBDDA_wlock)
656#include "locking-selftest-rlock.h"
657GENERATE_TESTCASE(ABCDBDDA_rlock)
658#include "locking-selftest-mutex.h"
659GENERATE_TESTCASE(ABCDBDDA_mutex)
660#include "locking-selftest-wsem.h"
661GENERATE_TESTCASE(ABCDBDDA_wsem)
662#include "locking-selftest-rsem.h"
663GENERATE_TESTCASE(ABCDBDDA_rsem)
664
018956d6
PZ		 665#ifdef CONFIG_RT_MUTEXES
666#include "locking-selftest-rtmutex.h"
667GENERATE_TESTCASE(ABCDBDDA_rtmutex);
668#endif
669
cae2ed9a
IM		 670#undef E
671
672/*
673 * AB CD BC DA deadlock:
674 */
675#define E() \
676 \
677 LOCK_UNLOCK_2(A, B); \
678 LOCK_UNLOCK_2(C, D); \
679 LOCK_UNLOCK_2(B, C); \
680 LOCK_UNLOCK_2(D, A); /* fail */
681
682/*
683 * 6 testcases:
684 */
685#include "locking-selftest-spin.h"
686GENERATE_TESTCASE(ABCDBCDA_spin)
687#include "locking-selftest-wlock.h"
688GENERATE_TESTCASE(ABCDBCDA_wlock)
689#include "locking-selftest-rlock.h"
690GENERATE_TESTCASE(ABCDBCDA_rlock)
691#include "locking-selftest-mutex.h"
692GENERATE_TESTCASE(ABCDBCDA_mutex)
693#include "locking-selftest-wsem.h"
694GENERATE_TESTCASE(ABCDBCDA_wsem)
695#include "locking-selftest-rsem.h"
696GENERATE_TESTCASE(ABCDBCDA_rsem)
697
018956d6
PZ		 698#ifdef CONFIG_RT_MUTEXES
699#include "locking-selftest-rtmutex.h"
700GENERATE_TESTCASE(ABCDBCDA_rtmutex);
701#endif
702
cae2ed9a
IM		 703#undef E
704
705/*
706 * Double unlock:
707 */
708#define E() \
709 \
710 LOCK(A); \
711 UNLOCK(A); \
712 UNLOCK(A); /* fail */
713
714/*
715 * 6 testcases:
716 */
717#include "locking-selftest-spin.h"
718GENERATE_TESTCASE(double_unlock_spin)
719#include "locking-selftest-wlock.h"
720GENERATE_TESTCASE(double_unlock_wlock)
721#include "locking-selftest-rlock.h"
722GENERATE_TESTCASE(double_unlock_rlock)
723#include "locking-selftest-mutex.h"
724GENERATE_TESTCASE(double_unlock_mutex)
725#include "locking-selftest-wsem.h"
726GENERATE_TESTCASE(double_unlock_wsem)
727#include "locking-selftest-rsem.h"
728GENERATE_TESTCASE(double_unlock_rsem)
729
018956d6
PZ		 730#ifdef CONFIG_RT_MUTEXES
731#include "locking-selftest-rtmutex.h"
732GENERATE_TESTCASE(double_unlock_rtmutex);
733#endif
734
cae2ed9a
IM		 735#undef E
736
cae2ed9a
IM		 737/*
738 * initializing a held lock:
739 */
740#define E() \
741 \
742 LOCK(A); \
743 INIT(A); /* fail */
744
745/*
746 * 6 testcases:
747 */
748#include "locking-selftest-spin.h"
749GENERATE_TESTCASE(init_held_spin)
750#include "locking-selftest-wlock.h"
751GENERATE_TESTCASE(init_held_wlock)
752#include "locking-selftest-rlock.h"
753GENERATE_TESTCASE(init_held_rlock)
754#include "locking-selftest-mutex.h"
755GENERATE_TESTCASE(init_held_mutex)
756#include "locking-selftest-wsem.h"
757GENERATE_TESTCASE(init_held_wsem)
758#include "locking-selftest-rsem.h"
759GENERATE_TESTCASE(init_held_rsem)
760
018956d6
PZ		 761#ifdef CONFIG_RT_MUTEXES
762#include "locking-selftest-rtmutex.h"
763GENERATE_TESTCASE(init_held_rtmutex);
764#endif
765
cae2ed9a
IM		 766#undef E
767
768/*
769 * locking an irq-safe lock with irqs enabled:
770 */
771#define E1() \
772 \
773 IRQ_ENTER(); \
774 LOCK(A); \
775 UNLOCK(A); \
776 IRQ_EXIT();
777
778#define E2() \
779 \
780 LOCK(A); \
781 UNLOCK(A);
782
783/*
784 * Generate 24 testcases:
785 */
786#include "locking-selftest-spin-hardirq.h"
787GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_spin)
788
789#include "locking-selftest-rlock-hardirq.h"
790GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_rlock)
791
792#include "locking-selftest-wlock-hardirq.h"
793GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_wlock)
794
795#include "locking-selftest-spin-softirq.h"
796GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_spin)
797
798#include "locking-selftest-rlock-softirq.h"
799GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_rlock)
800
801#include "locking-selftest-wlock-softirq.h"
802GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_wlock)
803
804#undef E1
805#undef E2
806
807/*
808 * Enabling hardirqs with a softirq-safe lock held:
809 */
810#define E1() \
811 \
812 SOFTIRQ_ENTER(); \
813 LOCK(A); \
814 UNLOCK(A); \
815 SOFTIRQ_EXIT();
816
817#define E2() \
818 \
819 HARDIRQ_DISABLE(); \
820 LOCK(A); \
821 HARDIRQ_ENABLE(); \
822 UNLOCK(A);
823
824/*
825 * Generate 12 testcases:
826 */
827#include "locking-selftest-spin.h"
828GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_spin)
829
830#include "locking-selftest-wlock.h"
831GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_wlock)
832
833#include "locking-selftest-rlock.h"
834GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_rlock)
835
836#undef E1
837#undef E2
838
839/*
840 * Enabling irqs with an irq-safe lock held:
841 */
842#define E1() \
843 \
844 IRQ_ENTER(); \
845 LOCK(A); \
846 UNLOCK(A); \
847 IRQ_EXIT();
848
849#define E2() \
850 \
851 IRQ_DISABLE(); \
852 LOCK(A); \
853 IRQ_ENABLE(); \
854 UNLOCK(A);
855
856/*
857 * Generate 24 testcases:
858 */
859#include "locking-selftest-spin-hardirq.h"
860GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_spin)
861
862#include "locking-selftest-rlock-hardirq.h"
863GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_rlock)
864
865#include "locking-selftest-wlock-hardirq.h"
866GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_wlock)
867
868#include "locking-selftest-spin-softirq.h"
869GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_spin)
870
871#include "locking-selftest-rlock-softirq.h"
872GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_rlock)
873
874#include "locking-selftest-wlock-softirq.h"
875GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_wlock)
876
877#undef E1
878#undef E2
879
880/*
881 * Acquiring a irq-unsafe lock while holding an irq-safe-lock:
882 */
883#define E1() \
884 \
885 LOCK(A); \
886 LOCK(B); \
887 UNLOCK(B); \
888 UNLOCK(A); \
889
890#define E2() \
891 \
892 LOCK(B); \
893 UNLOCK(B);
894
895#define E3() \
896 \
897 IRQ_ENTER(); \
898 LOCK(A); \
899 UNLOCK(A); \
900 IRQ_EXIT();
901
902/*
903 * Generate 36 testcases:
904 */
905#include "locking-selftest-spin-hardirq.h"
906GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_spin)
907
908#include "locking-selftest-rlock-hardirq.h"
909GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_rlock)
910
911#include "locking-selftest-wlock-hardirq.h"
912GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_wlock)
913
914#include "locking-selftest-spin-softirq.h"
915GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_spin)
916
917#include "locking-selftest-rlock-softirq.h"
918GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_rlock)
919
920#include "locking-selftest-wlock-softirq.h"
921GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_wlock)
922
923#undef E1
924#undef E2
925#undef E3
926
927/*
928 * If a lock turns into softirq-safe, but earlier it took
929 * a softirq-unsafe lock:
930 */
931
932#define E1() \
933 IRQ_DISABLE(); \
934 LOCK(A); \
935 LOCK(B); \
936 UNLOCK(B); \
937 UNLOCK(A); \
938 IRQ_ENABLE();
939
940#define E2() \
941 LOCK(B); \
942 UNLOCK(B);
943
944#define E3() \
945 IRQ_ENTER(); \
946 LOCK(A); \
947 UNLOCK(A); \
948 IRQ_EXIT();
949
950/*
951 * Generate 36 testcases:
952 */
953#include "locking-selftest-spin-hardirq.h"
954GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_spin)
955
956#include "locking-selftest-rlock-hardirq.h"
957GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_rlock)
958
959#include "locking-selftest-wlock-hardirq.h"
960GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_wlock)
961
962#include "locking-selftest-spin-softirq.h"
963GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_spin)
964
965#include "locking-selftest-rlock-softirq.h"
966GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_rlock)
967
968#include "locking-selftest-wlock-softirq.h"
969GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_wlock)
970
971#undef E1
972#undef E2
973#undef E3
974
975/*
976 * read-lock / write-lock irq inversion.
977 *
978 * Deadlock scenario:
979 *
980 * CPU#1 is at #1, i.e. it has write-locked A, but has not
981 * taken B yet.
982 *
983 * CPU#2 is at #2, i.e. it has locked B.
984 *
985 * Hardirq hits CPU#2 at point #2 and is trying to read-lock A.
986 *
987 * The deadlock occurs because CPU#1 will spin on B, and CPU#2
988 * will spin on A.
989 */
990
991#define E1() \
992 \
993 IRQ_DISABLE(); \
994 WL(A); \
995 LOCK(B); \
996 UNLOCK(B); \
997 WU(A); \
998 IRQ_ENABLE();
999
1000#define E2() \
1001 \
1002 LOCK(B); \
1003 UNLOCK(B);
1004
1005#define E3() \
1006 \
1007 IRQ_ENTER(); \
1008 RL(A); \
1009 RU(A); \
1010 IRQ_EXIT();
1011
1012/*
1013 * Generate 36 testcases:
1014 */
1015#include "locking-selftest-spin-hardirq.h"
1016GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_hard_spin)
1017
1018#include "locking-selftest-rlock-hardirq.h"
1019GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_hard_rlock)
1020
1021#include "locking-selftest-wlock-hardirq.h"
1022GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_hard_wlock)
1023
1024#include "locking-selftest-spin-softirq.h"
1025GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_soft_spin)
1026
1027#include "locking-selftest-rlock-softirq.h"
1028GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_soft_rlock)
1029
1030#include "locking-selftest-wlock-softirq.h"
1031GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_soft_wlock)
1032
1033#undef E1
1034#undef E2
1035#undef E3
1036
1037/*
1038 * read-lock / write-lock recursion that is actually safe.
1039 */
1040
1041#define E1() \
1042 \
1043 IRQ_DISABLE(); \
1044 WL(A); \
1045 WU(A); \
1046 IRQ_ENABLE();
1047
1048#define E2() \
1049 \
1050 RL(A); \
1051 RU(A); \
1052
1053#define E3() \
1054 \
1055 IRQ_ENTER(); \
1056 RL(A); \
1057 L(B); \
1058 U(B); \
1059 RU(A); \
1060 IRQ_EXIT();
1061
1062/*
1063 * Generate 12 testcases:
1064 */
1065#include "locking-selftest-hardirq.h"
1066GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_hard)
1067
1068#include "locking-selftest-softirq.h"
1069GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_soft)
1070
1071#undef E1
1072#undef E2
1073#undef E3
1074
1075/*
1076 * read-lock / write-lock recursion that is unsafe.
1077 */
1078
1079#define E1() \
1080 \
1081 IRQ_DISABLE(); \
1082 L(B); \
1083 WL(A); \
1084 WU(A); \
1085 U(B); \
1086 IRQ_ENABLE();
1087
1088#define E2() \
1089 \
1090 RL(A); \
1091 RU(A); \
1092
1093#define E3() \
1094 \
1095 IRQ_ENTER(); \
1096 L(B); \
1097 U(B); \
1098 IRQ_EXIT();
1099
1100/*
1101 * Generate 12 testcases:
1102 */
1103#include "locking-selftest-hardirq.h"
1104// GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion2_hard)
1105
1106#include "locking-selftest-softirq.h"
1107// GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion2_soft)
1108
cae2ed9a
IM		 1109#ifdef CONFIG_DEBUG_LOCK_ALLOC
1110# define I_SPINLOCK(x) lockdep_reset_lock(&lock_##x.dep_map)
1111# define I_RWLOCK(x) lockdep_reset_lock(&rwlock_##x.dep_map)
1112# define I_MUTEX(x) lockdep_reset_lock(&mutex_##x.dep_map)
1113# define I_RWSEM(x) lockdep_reset_lock(&rwsem_##x.dep_map)
1de99445 1114# define I_WW(x) lockdep_reset_lock(&x.dep_map)
018956d6
PZ		 1115#ifdef CONFIG_RT_MUTEXES
1116# define I_RTMUTEX(x) lockdep_reset_lock(&rtmutex_##x.dep_map)
1117#endif
cae2ed9a
IM		 1118#else
1119# define I_SPINLOCK(x)
1120# define I_RWLOCK(x)
1121# define I_MUTEX(x)
1122# define I_RWSEM(x)
1de99445 1123# define I_WW(x)
cae2ed9a
IM		 1124#endif
1125
018956d6
PZ		 1126#ifndef I_RTMUTEX
1127# define I_RTMUTEX(x)
1128#endif
1129
1130#ifdef CONFIG_RT_MUTEXES
1131#define I2_RTMUTEX(x) rt_mutex_init(&rtmutex_##x)
1132#else
1133#define I2_RTMUTEX(x)
1134#endif
1135
cae2ed9a
IM		 1136#define I1(x) \
1137 do { \
1138 I_SPINLOCK(x); \
1139 I_RWLOCK(x); \
1140 I_MUTEX(x); \
1141 I_RWSEM(x); \
018956d6 1142 I_RTMUTEX(x); \
cae2ed9a
IM		 1143 } while (0)
1144
1145#define I2(x) \
1146 do { \
9fb1b90c 1147 raw_spin_lock_init(&lock_##x); \
cae2ed9a
IM		 1148 rwlock_init(&rwlock_##x); \
1149 mutex_init(&mutex_##x); \
1150 init_rwsem(&rwsem_##x); \
018956d6 1151 I2_RTMUTEX(x); \
cae2ed9a
IM		 1152 } while (0)
1153
1154static void reset_locks(void)
1155{
1156 local_irq_disable();
1de99445
ML		 1157 lockdep_free_key_range(&ww_lockdep.acquire_key, 1);
1158 lockdep_free_key_range(&ww_lockdep.mutex_key, 1);
1159
cae2ed9a
IM		 1160 I1(A); I1(B); I1(C); I1(D);
1161 I1(X1); I1(X2); I1(Y1); I1(Y2); I1(Z1); I1(Z2);
f3cf139e 1162 I_WW(t); I_WW(t2); I_WW(o.base); I_WW(o2.base); I_WW(o3.base);
cae2ed9a
IM		 1163 lockdep_reset();
1164 I2(A); I2(B); I2(C); I2(D);
1165 init_shared_classes();
1de99445 1166
f3cf139e 1167 ww_mutex_init(&o, &ww_lockdep); ww_mutex_init(&o2, &ww_lockdep); ww_mutex_init(&o3, &ww_lockdep);
1de99445
ML		 1168 memset(&t, 0, sizeof(t)); memset(&t2, 0, sizeof(t2));
1169 memset(&ww_lockdep.acquire_key, 0, sizeof(ww_lockdep.acquire_key));
1170 memset(&ww_lockdep.mutex_key, 0, sizeof(ww_lockdep.mutex_key));
cae2ed9a
IM		 1171 local_irq_enable();
1172}
1173
1174#undef I
1175
1176static int testcase_total;
1177static int testcase_successes;
1178static int expected_testcase_failures;
1179static int unexpected_testcase_failures;
1180
1181static void dotest(void (*testcase_fn)(void), int expected, int lockclass_mask)
1182{
1183 unsigned long saved_preempt_count = preempt_count();
cae2ed9a
IM		 1184
1185 WARN_ON(irqs_disabled());
1186
1187 testcase_fn();
1188 /*
1189 * Filter out expected failures:
1190 */
1191#ifndef CONFIG_PROVE_LOCKING
166989e3 1192 if (expected == FAILURE && debug_locks) {
1de99445 1193 expected_testcase_failures++;
25139409 1194 pr_cont("failed|");
166989e3
ML		 1195 }
1196 else
1197#endif
1198 if (debug_locks != expected) {
1de99445 1199 unexpected_testcase_failures++;
25139409 1200 pr_cont("FAILED|");
cae2ed9a
IM		 1201 } else {
1202 testcase_successes++;
25139409 1203 pr_cont(" ok |");
cae2ed9a
IM		 1204 }
1205 testcase_total++;
1206
1207 if (debug_locks_verbose)
25139409 1208 pr_cont(" lockclass mask: %x, debug_locks: %d, expected: %d\n",
cae2ed9a
IM		 1209 lockclass_mask, debug_locks, expected);
1210 /*
1211 * Some tests (e.g. double-unlock) might corrupt the preemption
1212 * count, so restore it:
1213 */
4a2b4b22 1214 preempt_count_set(saved_preempt_count);
cae2ed9a
IM		 1215#ifdef CONFIG_TRACE_IRQFLAGS
1216 if (softirq_count())
1217 current->softirqs_enabled = 0;
1218 else
1219 current->softirqs_enabled = 1;
1220#endif
1221
1222 reset_locks();
1223}
1224
018956d6
PZ		 1225#ifdef CONFIG_RT_MUTEXES
1226#define dotest_rt(fn, e, m) dotest((fn), (e), (m))
1227#else
1228#define dotest_rt(fn, e, m)
1229#endif
1230
cae2ed9a
IM		 1231static inline void print_testname(const char *testname)
1232{
1233 printk("%33s:", testname);
1234}
1235
1236#define DO_TESTCASE_1(desc, name, nr) \
1237 print_testname(desc"/"#nr); \
1238 dotest(name##_##nr, SUCCESS, LOCKTYPE_RWLOCK); \
25139409 1239 pr_cont("\n");
cae2ed9a
IM		 1240
1241#define DO_TESTCASE_1B(desc, name, nr) \
1242 print_testname(desc"/"#nr); \
1243 dotest(name##_##nr, FAILURE, LOCKTYPE_RWLOCK); \
25139409 1244 pr_cont("\n");
cae2ed9a
IM		 1245
1246#define DO_TESTCASE_3(desc, name, nr) \
1247 print_testname(desc"/"#nr); \
1248 dotest(name##_spin_##nr, FAILURE, LOCKTYPE_SPIN); \
1249 dotest(name##_wlock_##nr, FAILURE, LOCKTYPE_RWLOCK); \
1250 dotest(name##_rlock_##nr, SUCCESS, LOCKTYPE_RWLOCK); \
25139409 1251 pr_cont("\n");
cae2ed9a
IM		 1252
1253#define DO_TESTCASE_3RW(desc, name, nr) \
1254 print_testname(desc"/"#nr); \
1255 dotest(name##_spin_##nr, FAILURE, LOCKTYPE_SPIN|LOCKTYPE_RWLOCK);\
1256 dotest(name##_wlock_##nr, FAILURE, LOCKTYPE_RWLOCK); \
1257 dotest(name##_rlock_##nr, SUCCESS, LOCKTYPE_RWLOCK); \
25139409 1258 pr_cont("\n");
cae2ed9a
IM		 1259
1260#define DO_TESTCASE_6(desc, name) \
1261 print_testname(desc); \
1262 dotest(name##_spin, FAILURE, LOCKTYPE_SPIN); \
1263 dotest(name##_wlock, FAILURE, LOCKTYPE_RWLOCK); \
1264 dotest(name##_rlock, FAILURE, LOCKTYPE_RWLOCK); \
1265 dotest(name##_mutex, FAILURE, LOCKTYPE_MUTEX); \
1266 dotest(name##_wsem, FAILURE, LOCKTYPE_RWSEM); \
1267 dotest(name##_rsem, FAILURE, LOCKTYPE_RWSEM); \
018956d6 1268 dotest_rt(name##_rtmutex, FAILURE, LOCKTYPE_RTMUTEX); \
25139409 1269 pr_cont("\n");
cae2ed9a
IM		 1270
1271#define DO_TESTCASE_6_SUCCESS(desc, name) \
1272 print_testname(desc); \
1273 dotest(name##_spin, SUCCESS, LOCKTYPE_SPIN); \
1274 dotest(name##_wlock, SUCCESS, LOCKTYPE_RWLOCK); \
1275 dotest(name##_rlock, SUCCESS, LOCKTYPE_RWLOCK); \
1276 dotest(name##_mutex, SUCCESS, LOCKTYPE_MUTEX); \
1277 dotest(name##_wsem, SUCCESS, LOCKTYPE_RWSEM); \
1278 dotest(name##_rsem, SUCCESS, LOCKTYPE_RWSEM); \
018956d6 1279 dotest_rt(name##_rtmutex, SUCCESS, LOCKTYPE_RTMUTEX); \
25139409 1280 pr_cont("\n");
cae2ed9a
IM		 1281
1282/*
1283 * 'read' variant: rlocks must not trigger.
1284 */
1285#define DO_TESTCASE_6R(desc, name) \
1286 print_testname(desc); \
1287 dotest(name##_spin, FAILURE, LOCKTYPE_SPIN); \
1288 dotest(name##_wlock, FAILURE, LOCKTYPE_RWLOCK); \
1289 dotest(name##_rlock, SUCCESS, LOCKTYPE_RWLOCK); \
1290 dotest(name##_mutex, FAILURE, LOCKTYPE_MUTEX); \
1291 dotest(name##_wsem, FAILURE, LOCKTYPE_RWSEM); \
1292 dotest(name##_rsem, FAILURE, LOCKTYPE_RWSEM); \
018956d6 1293 dotest_rt(name##_rtmutex, FAILURE, LOCKTYPE_RTMUTEX); \
25139409 1294 pr_cont("\n");
cae2ed9a
IM		 1295
1296#define DO_TESTCASE_2I(desc, name, nr) \
1297 DO_TESTCASE_1("hard-"desc, name##_hard, nr); \
1298 DO_TESTCASE_1("soft-"desc, name##_soft, nr);
1299
1300#define DO_TESTCASE_2IB(desc, name, nr) \
1301 DO_TESTCASE_1B("hard-"desc, name##_hard, nr); \
1302 DO_TESTCASE_1B("soft-"desc, name##_soft, nr);
1303
1304#define DO_TESTCASE_6I(desc, name, nr) \
1305 DO_TESTCASE_3("hard-"desc, name##_hard, nr); \
1306 DO_TESTCASE_3("soft-"desc, name##_soft, nr);
1307
1308#define DO_TESTCASE_6IRW(desc, name, nr) \
1309 DO_TESTCASE_3RW("hard-"desc, name##_hard, nr); \
1310 DO_TESTCASE_3RW("soft-"desc, name##_soft, nr);
1311
1312#define DO_TESTCASE_2x3(desc, name) \
1313 DO_TESTCASE_3(desc, name, 12); \
1314 DO_TESTCASE_3(desc, name, 21);
1315
1316#define DO_TESTCASE_2x6(desc, name) \
1317 DO_TESTCASE_6I(desc, name, 12); \
1318 DO_TESTCASE_6I(desc, name, 21);
1319
1320#define DO_TESTCASE_6x2(desc, name) \
1321 DO_TESTCASE_2I(desc, name, 123); \
1322 DO_TESTCASE_2I(desc, name, 132); \
1323 DO_TESTCASE_2I(desc, name, 213); \
1324 DO_TESTCASE_2I(desc, name, 231); \
1325 DO_TESTCASE_2I(desc, name, 312); \
1326 DO_TESTCASE_2I(desc, name, 321);
1327
1328#define DO_TESTCASE_6x2B(desc, name) \
1329 DO_TESTCASE_2IB(desc, name, 123); \
1330 DO_TESTCASE_2IB(desc, name, 132); \
1331 DO_TESTCASE_2IB(desc, name, 213); \
1332 DO_TESTCASE_2IB(desc, name, 231); \
1333 DO_TESTCASE_2IB(desc, name, 312); \
1334 DO_TESTCASE_2IB(desc, name, 321);
1335
1336#define DO_TESTCASE_6x6(desc, name) \
1337 DO_TESTCASE_6I(desc, name, 123); \
1338 DO_TESTCASE_6I(desc, name, 132); \
1339 DO_TESTCASE_6I(desc, name, 213); \
1340 DO_TESTCASE_6I(desc, name, 231); \
1341 DO_TESTCASE_6I(desc, name, 312); \
1342 DO_TESTCASE_6I(desc, name, 321);
1343
1344#define DO_TESTCASE_6x6RW(desc, name) \
1345 DO_TESTCASE_6IRW(desc, name, 123); \
1346 DO_TESTCASE_6IRW(desc, name, 132); \
1347 DO_TESTCASE_6IRW(desc, name, 213); \
1348 DO_TESTCASE_6IRW(desc, name, 231); \
1349 DO_TESTCASE_6IRW(desc, name, 312); \
1350 DO_TESTCASE_6IRW(desc, name, 321);
1351
1de99445
ML		 1352static void ww_test_fail_acquire(void)
1353{
1354 int ret;
1355
1356 WWAI(&t);
1357 t.stamp++;
1358
1359 ret = WWL(&o, &t);
1360
1361 if (WARN_ON(!o.ctx) ||
1362 WARN_ON(ret))
1363 return;
1364
1365 /* No lockdep test, pure API */
1366 ret = WWL(&o, &t);
1367 WARN_ON(ret != -EALREADY);
1368
1369 ret = WWT(&o);
1370 WARN_ON(ret);
1371
1372 t2 = t;
1373 t2.stamp++;
1374 ret = WWL(&o, &t2);
1375 WARN_ON(ret != -EDEADLK);
1376 WWU(&o);
1377
1378 if (WWT(&o))
1379 WWU(&o);
1380#ifdef CONFIG_DEBUG_LOCK_ALLOC
1381 else
1382 DEBUG_LOCKS_WARN_ON(1);
1383#endif
1384}
1385
2fe3d4b1
ML		 1386static void ww_test_normal(void)
1387{
1388 int ret;
1389
1390 WWAI(&t);
1391
1392 /*
1393 * None of the ww_mutex codepaths should be taken in the 'normal'
1394 * mutex calls. The easiest way to verify this is by using the
1395 * normal mutex calls, and making sure o.ctx is unmodified.
1396 */
1397
1398 /* mutex_lock (and indirectly, mutex_lock_nested) */
1399 o.ctx = (void *)~0UL;
1400 mutex_lock(&o.base);
1401 mutex_unlock(&o.base);
1402 WARN_ON(o.ctx != (void *)~0UL);
1403
1404 /* mutex_lock_interruptible (and *_nested) */
1405 o.ctx = (void *)~0UL;
1406 ret = mutex_lock_interruptible(&o.base);
1407 if (!ret)
1408 mutex_unlock(&o.base);
1409 else
1410 WARN_ON(1);
1411 WARN_ON(o.ctx != (void *)~0UL);
1412
1413 /* mutex_lock_killable (and *_nested) */
1414 o.ctx = (void *)~0UL;
1415 ret = mutex_lock_killable(&o.base);
1416 if (!ret)
1417 mutex_unlock(&o.base);
1418 else
1419 WARN_ON(1);
1420 WARN_ON(o.ctx != (void *)~0UL);
1421
1422 /* trylock, succeeding */
1423 o.ctx = (void *)~0UL;
1424 ret = mutex_trylock(&o.base);
1425 WARN_ON(!ret);
1426 if (ret)
1427 mutex_unlock(&o.base);
1428 else
1429 WARN_ON(1);
1430 WARN_ON(o.ctx != (void *)~0UL);
1431
1432 /* trylock, failing */
1433 o.ctx = (void *)~0UL;
1434 mutex_lock(&o.base);
1435 ret = mutex_trylock(&o.base);
1436 WARN_ON(ret);
1437 mutex_unlock(&o.base);
1438 WARN_ON(o.ctx != (void *)~0UL);
1439
1440 /* nest_lock */
1441 o.ctx = (void *)~0UL;
1442 mutex_lock_nest_lock(&o.base, &t);
1443 mutex_unlock(&o.base);
1444 WARN_ON(o.ctx != (void *)~0UL);
1445}
1446
1de99445
ML		 1447static void ww_test_two_contexts(void)
1448{
1449 WWAI(&t);
1450 WWAI(&t2);
1451}
1452
1453static void ww_test_diff_class(void)
1454{
1455 WWAI(&t);
1456#ifdef CONFIG_DEBUG_MUTEXES
1457 t.ww_class = NULL;
1458#endif
1459 WWL(&o, &t);
1460}
1461
1462static void ww_test_context_done_twice(void)
1463{
1464 WWAI(&t);
1465 WWAD(&t);
1466 WWAD(&t);
1467 WWAF(&t);
1468}
1469
1470static void ww_test_context_unlock_twice(void)
1471{
1472 WWAI(&t);
1473 WWAD(&t);
1474 WWAF(&t);
1475 WWAF(&t);
1476}
1477
1478static void ww_test_context_fini_early(void)
1479{
1480 WWAI(&t);
1481 WWL(&o, &t);
1482 WWAD(&t);
1483 WWAF(&t);
1484}
1485
1486static void ww_test_context_lock_after_done(void)
1487{
1488 WWAI(&t);
1489 WWAD(&t);
1490 WWL(&o, &t);
1491}
1492
1493static void ww_test_object_unlock_twice(void)
1494{
1495 WWL1(&o);
1496 WWU(&o);
1497 WWU(&o);
1498}
1499
1500static void ww_test_object_lock_unbalanced(void)
1501{
1502 WWAI(&t);
1503 WWL(&o, &t);
1504 t.acquired = 0;
1505 WWU(&o);
1506 WWAF(&t);
1507}
1508
1509static void ww_test_object_lock_stale_context(void)
1510{
1511 WWAI(&t);
1512 o.ctx = &t2;
1513 WWL(&o, &t);
1514}
1515
f3cf139e
ML		 1516static void ww_test_edeadlk_normal(void)
1517{
1518 int ret;
1519
1520 mutex_lock(&o2.base);
1521 o2.ctx = &t2;
5facae4f 1522 mutex_release(&o2.base.dep_map, _THIS_IP_);
f3cf139e
ML		 1523
1524 WWAI(&t);
1525 t2 = t;
1526 t2.stamp--;
1527
1528 ret = WWL(&o, &t);
1529 WARN_ON(ret);
1530
1531 ret = WWL(&o2, &t);
1532 WARN_ON(ret != -EDEADLK);
1533
1534 o2.ctx = NULL;
1535 mutex_acquire(&o2.base.dep_map, 0, 1, _THIS_IP_);
1536 mutex_unlock(&o2.base);
1537 WWU(&o);
1538
1539 WWL(&o2, &t);
1540}
1541
1542static void ww_test_edeadlk_normal_slow(void)
1543{
1544 int ret;
1545
1546 mutex_lock(&o2.base);
5facae4f 1547 mutex_release(&o2.base.dep_map, _THIS_IP_);
f3cf139e
ML		 1548 o2.ctx = &t2;
1549
1550 WWAI(&t);
1551 t2 = t;
1552 t2.stamp--;
1553
1554 ret = WWL(&o, &t);
1555 WARN_ON(ret);
1556
1557 ret = WWL(&o2, &t);
1558 WARN_ON(ret != -EDEADLK);
1559
1560 o2.ctx = NULL;
1561 mutex_acquire(&o2.base.dep_map, 0, 1, _THIS_IP_);
1562 mutex_unlock(&o2.base);
1563 WWU(&o);
1564
1565 ww_mutex_lock_slow(&o2, &t);
1566}
1567
1568static void ww_test_edeadlk_no_unlock(void)
1569{
1570 int ret;
1571
1572 mutex_lock(&o2.base);
1573 o2.ctx = &t2;
5facae4f 1574 mutex_release(&o2.base.dep_map, _THIS_IP_);
f3cf139e
ML		 1575
1576 WWAI(&t);
1577 t2 = t;
1578 t2.stamp--;
1579
1580 ret = WWL(&o, &t);
1581 WARN_ON(ret);
1582
1583 ret = WWL(&o2, &t);
1584 WARN_ON(ret != -EDEADLK);
1585
1586 o2.ctx = NULL;
1587 mutex_acquire(&o2.base.dep_map, 0, 1, _THIS_IP_);
1588 mutex_unlock(&o2.base);
1589
1590 WWL(&o2, &t);
1591}
1592
1593static void ww_test_edeadlk_no_unlock_slow(void)
1594{
1595 int ret;
1596
1597 mutex_lock(&o2.base);
5facae4f 1598 mutex_release(&o2.base.dep_map, _THIS_IP_);
f3cf139e
ML		 1599 o2.ctx = &t2;
1600
1601 WWAI(&t);
1602 t2 = t;
1603 t2.stamp--;
1604
1605 ret = WWL(&o, &t);
1606 WARN_ON(ret);
1607
1608 ret = WWL(&o2, &t);
1609 WARN_ON(ret != -EDEADLK);
1610
1611 o2.ctx = NULL;
1612 mutex_acquire(&o2.base.dep_map, 0, 1, _THIS_IP_);
1613 mutex_unlock(&o2.base);
1614
1615 ww_mutex_lock_slow(&o2, &t);
1616}
1617
1618static void ww_test_edeadlk_acquire_more(void)
1619{
1620 int ret;
1621
1622 mutex_lock(&o2.base);
5facae4f 1623 mutex_release(&o2.base.dep_map, _THIS_IP_);
f3cf139e
ML		 1624 o2.ctx = &t2;
1625
1626 WWAI(&t);
1627 t2 = t;
1628 t2.stamp--;
1629
1630 ret = WWL(&o, &t);
1631 WARN_ON(ret);
1632
1633 ret = WWL(&o2, &t);
1634 WARN_ON(ret != -EDEADLK);
1635
1636 ret = WWL(&o3, &t);
1637}
1638
1639static void ww_test_edeadlk_acquire_more_slow(void)
1640{
1641 int ret;
1642
1643 mutex_lock(&o2.base);
5facae4f 1644 mutex_release(&o2.base.dep_map, _THIS_IP_);
f3cf139e
ML		 1645 o2.ctx = &t2;
1646
1647 WWAI(&t);
1648 t2 = t;
1649 t2.stamp--;
1650
1651 ret = WWL(&o, &t);
1652 WARN_ON(ret);
1653
1654 ret = WWL(&o2, &t);
1655 WARN_ON(ret != -EDEADLK);
1656
1657 ww_mutex_lock_slow(&o3, &t);
1658}
1659
1660static void ww_test_edeadlk_acquire_more_edeadlk(void)
1661{
1662 int ret;
1663
1664 mutex_lock(&o2.base);
5facae4f 1665 mutex_release(&o2.base.dep_map, _THIS_IP_);
f3cf139e
ML		 1666 o2.ctx = &t2;
1667
1668 mutex_lock(&o3.base);
5facae4f 1669 mutex_release(&o3.base.dep_map, _THIS_IP_);
f3cf139e
ML		 1670 o3.ctx = &t2;
1671
1672 WWAI(&t);
1673 t2 = t;
1674 t2.stamp--;
1675
1676 ret = WWL(&o, &t);
1677 WARN_ON(ret);
1678
1679 ret = WWL(&o2, &t);
1680 WARN_ON(ret != -EDEADLK);
1681
1682 ret = WWL(&o3, &t);
1683 WARN_ON(ret != -EDEADLK);
1684}
1685
1686static void ww_test_edeadlk_acquire_more_edeadlk_slow(void)
1687{
1688 int ret;
1689
1690 mutex_lock(&o2.base);
5facae4f 1691 mutex_release(&o2.base.dep_map, _THIS_IP_);
f3cf139e
ML		 1692 o2.ctx = &t2;
1693
1694 mutex_lock(&o3.base);
5facae4f 1695 mutex_release(&o3.base.dep_map, _THIS_IP_);
f3cf139e
ML		 1696 o3.ctx = &t2;
1697
1698 WWAI(&t);
1699 t2 = t;
1700 t2.stamp--;
1701
1702 ret = WWL(&o, &t);
1703 WARN_ON(ret);
1704
1705 ret = WWL(&o2, &t);
1706 WARN_ON(ret != -EDEADLK);
1707
1708 ww_mutex_lock_slow(&o3, &t);
1709}
1710
1711static void ww_test_edeadlk_acquire_wrong(void)
1712{
1713 int ret;
1714
1715 mutex_lock(&o2.base);
5facae4f 1716 mutex_release(&o2.base.dep_map, _THIS_IP_);
f3cf139e
ML		 1717 o2.ctx = &t2;
1718
1719 WWAI(&t);
1720 t2 = t;
1721 t2.stamp--;
1722
1723 ret = WWL(&o, &t);
1724 WARN_ON(ret);
1725
1726 ret = WWL(&o2, &t);
1727 WARN_ON(ret != -EDEADLK);
1728 if (!ret)
1729 WWU(&o2);
1730
1731 WWU(&o);
1732
1733 ret = WWL(&o3, &t);
1734}
1735
1736static void ww_test_edeadlk_acquire_wrong_slow(void)
1737{
1738 int ret;
1739
1740 mutex_lock(&o2.base);
5facae4f 1741 mutex_release(&o2.base.dep_map, _THIS_IP_);
f3cf139e
ML		 1742 o2.ctx = &t2;
1743
1744 WWAI(&t);
1745 t2 = t;
1746 t2.stamp--;
1747
1748 ret = WWL(&o, &t);
1749 WARN_ON(ret);
1750
1751 ret = WWL(&o2, &t);
1752 WARN_ON(ret != -EDEADLK);
1753 if (!ret)
1754 WWU(&o2);
1755
1756 WWU(&o);
1757
1758 ww_mutex_lock_slow(&o3, &t);
1759}
1760
1de99445
ML		 1761static void ww_test_spin_nest_unlocked(void)
1762{
1763 raw_spin_lock_nest_lock(&lock_A, &o.base);
1764 U(A);
1765}
1766
1767static void ww_test_unneeded_slow(void)
1768{
1769 WWAI(&t);
1770
1771 ww_mutex_lock_slow(&o, &t);
1772}
1773
1774static void ww_test_context_block(void)
1775{
1776 int ret;
1777
1778 WWAI(&t);
1779
1780 ret = WWL(&o, &t);
1781 WARN_ON(ret);
1782 WWL1(&o2);
1783}
1784
1785static void ww_test_context_try(void)
1786{
1787 int ret;
1788
1789 WWAI(&t);
1790
1791 ret = WWL(&o, &t);
1792 WARN_ON(ret);
1793
1794 ret = WWT(&o2);
1795 WARN_ON(!ret);
1796 WWU(&o2);
1797 WWU(&o);
1798}
1799
1800static void ww_test_context_context(void)
1801{
1802 int ret;
1803
1804 WWAI(&t);
1805
1806 ret = WWL(&o, &t);
1807 WARN_ON(ret);
1808
1809 ret = WWL(&o2, &t);
1810 WARN_ON(ret);
1811
1812 WWU(&o2);
1813 WWU(&o);
1814}
1815
1816static void ww_test_try_block(void)
1817{
1818 bool ret;
1819
1820 ret = WWT(&o);
1821 WARN_ON(!ret);
1822
1823 WWL1(&o2);
1824 WWU(&o2);
1825 WWU(&o);
1826}
1827
1828static void ww_test_try_try(void)
1829{
1830 bool ret;
1831
1832 ret = WWT(&o);
1833 WARN_ON(!ret);
1834 ret = WWT(&o2);
1835 WARN_ON(!ret);
1836 WWU(&o2);
1837 WWU(&o);
1838}
1839
1840static void ww_test_try_context(void)
1841{
1842 int ret;
1843
1844 ret = WWT(&o);
1845 WARN_ON(!ret);
1846
1847 WWAI(&t);
1848
1849 ret = WWL(&o2, &t);
1850 WARN_ON(ret);
1851}
1852
1853static void ww_test_block_block(void)
1854{
1855 WWL1(&o);
1856 WWL1(&o2);
1857}
1858
1859static void ww_test_block_try(void)
1860{
1861 bool ret;
1862
1863 WWL1(&o);
1864 ret = WWT(&o2);
1865 WARN_ON(!ret);
1866}
1867
1868static void ww_test_block_context(void)
1869{
1870 int ret;
1871
1872 WWL1(&o);
1873 WWAI(&t);
1874
1875 ret = WWL(&o2, &t);
1876 WARN_ON(ret);
1877}
1878
1879static void ww_test_spin_block(void)
1880{
1881 L(A);
1882 U(A);
1883
1884 WWL1(&o);
1885 L(A);
1886 U(A);
1887 WWU(&o);
1888
1889 L(A);
1890 WWL1(&o);
1891 WWU(&o);
1892 U(A);
1893}
1894
1895static void ww_test_spin_try(void)
1896{
1897 bool ret;
1898
1899 L(A);
1900 U(A);
1901
1902 ret = WWT(&o);
1903 WARN_ON(!ret);
1904 L(A);
1905 U(A);
1906 WWU(&o);
1907
1908 L(A);
1909 ret = WWT(&o);
1910 WARN_ON(!ret);
1911 WWU(&o);
1912 U(A);
1913}
1914
1915static void ww_test_spin_context(void)
1916{
1917 int ret;
1918
1919 L(A);
1920 U(A);
1921
1922 WWAI(&t);
1923
1924 ret = WWL(&o, &t);
1925 WARN_ON(ret);
1926 L(A);
1927 U(A);
1928 WWU(&o);
1929
1930 L(A);
1931 ret = WWL(&o, &t);
1932 WARN_ON(ret);
1933 WWU(&o);
1934 U(A);
1935}
1936
1937static void ww_tests(void)
1938{
1939 printk(" --------------------------------------------------------------------------\n");
1940 printk(" | Wound/wait tests |\n");
1941 printk(" ---------------------\n");
1942
1943 print_testname("ww api failures");
1944 dotest(ww_test_fail_acquire, SUCCESS, LOCKTYPE_WW);
2fe3d4b1 1945 dotest(ww_test_normal, SUCCESS, LOCKTYPE_WW);
1de99445 1946 dotest(ww_test_unneeded_slow, FAILURE, LOCKTYPE_WW);
25139409 1947 pr_cont("\n");
1de99445
ML		 1948
1949 print_testname("ww contexts mixing");
1950 dotest(ww_test_two_contexts, FAILURE, LOCKTYPE_WW);
1951 dotest(ww_test_diff_class, FAILURE, LOCKTYPE_WW);
25139409 1952 pr_cont("\n");
1de99445
ML		 1953
1954 print_testname("finishing ww context");
1955 dotest(ww_test_context_done_twice, FAILURE, LOCKTYPE_WW);
1956 dotest(ww_test_context_unlock_twice, FAILURE, LOCKTYPE_WW);
1957 dotest(ww_test_context_fini_early, FAILURE, LOCKTYPE_WW);
1958 dotest(ww_test_context_lock_after_done, FAILURE, LOCKTYPE_WW);
25139409 1959 pr_cont("\n");
1de99445
ML		 1960
1961 print_testname("locking mismatches");
1962 dotest(ww_test_object_unlock_twice, FAILURE, LOCKTYPE_WW);
1963 dotest(ww_test_object_lock_unbalanced, FAILURE, LOCKTYPE_WW);
1964 dotest(ww_test_object_lock_stale_context, FAILURE, LOCKTYPE_WW);
25139409 1965 pr_cont("\n");
1de99445 1966
f3cf139e
ML		 1967 print_testname("EDEADLK handling");
1968 dotest(ww_test_edeadlk_normal, SUCCESS, LOCKTYPE_WW);
1969 dotest(ww_test_edeadlk_normal_slow, SUCCESS, LOCKTYPE_WW);
1970 dotest(ww_test_edeadlk_no_unlock, FAILURE, LOCKTYPE_WW);
1971 dotest(ww_test_edeadlk_no_unlock_slow, FAILURE, LOCKTYPE_WW);
1972 dotest(ww_test_edeadlk_acquire_more, FAILURE, LOCKTYPE_WW);
1973 dotest(ww_test_edeadlk_acquire_more_slow, FAILURE, LOCKTYPE_WW);
1974 dotest(ww_test_edeadlk_acquire_more_edeadlk, FAILURE, LOCKTYPE_WW);
1975 dotest(ww_test_edeadlk_acquire_more_edeadlk_slow, FAILURE, LOCKTYPE_WW);
1976 dotest(ww_test_edeadlk_acquire_wrong, FAILURE, LOCKTYPE_WW);
1977 dotest(ww_test_edeadlk_acquire_wrong_slow, FAILURE, LOCKTYPE_WW);
25139409 1978 pr_cont("\n");
f3cf139e 1979
1de99445
ML		 1980 print_testname("spinlock nest unlocked");
1981 dotest(ww_test_spin_nest_unlocked, FAILURE, LOCKTYPE_WW);
25139409 1982 pr_cont("\n");
1de99445
ML		 1983
1984 printk(" -----------------------------------------------------\n");
1985 printk(" |block | try |context|\n");
1986 printk(" -----------------------------------------------------\n");
1987
1988 print_testname("context");
1989 dotest(ww_test_context_block, FAILURE, LOCKTYPE_WW);
1990 dotest(ww_test_context_try, SUCCESS, LOCKTYPE_WW);
1991 dotest(ww_test_context_context, SUCCESS, LOCKTYPE_WW);
25139409 1992 pr_cont("\n");
1de99445
ML		 1993
1994 print_testname("try");
1995 dotest(ww_test_try_block, FAILURE, LOCKTYPE_WW);
1996 dotest(ww_test_try_try, SUCCESS, LOCKTYPE_WW);
1997 dotest(ww_test_try_context, FAILURE, LOCKTYPE_WW);
25139409 1998 pr_cont("\n");
1de99445
ML		 1999
2000 print_testname("block");
2001 dotest(ww_test_block_block, FAILURE, LOCKTYPE_WW);
2002 dotest(ww_test_block_try, SUCCESS, LOCKTYPE_WW);
2003 dotest(ww_test_block_context, FAILURE, LOCKTYPE_WW);
25139409 2004 pr_cont("\n");
1de99445
ML		 2005
2006 print_testname("spinlock");
2007 dotest(ww_test_spin_block, FAILURE, LOCKTYPE_WW);
2008 dotest(ww_test_spin_try, SUCCESS, LOCKTYPE_WW);
2009 dotest(ww_test_spin_context, FAILURE, LOCKTYPE_WW);
25139409 2010 pr_cont("\n");
1de99445 2011}
cae2ed9a
IM		 2012
2013void locking_selftest(void)
2014{
2015 /*
2016 * Got a locking failure before the selftest ran?
2017 */
2018 if (!debug_locks) {
2019 printk("----------------------------------\n");
2020 printk("| Locking API testsuite disabled |\n");
2021 printk("----------------------------------\n");
2022 return;
2023 }
2024
e9181886
BF		 2025 /*
2026 * treats read_lock() as recursive read locks for testing purpose
2027 */
2028 force_read_lock_recursive = 1;
2029
cae2ed9a
IM		 2030 /*
2031 * Run the testsuite:
2032 */
2033 printk("------------------------\n");
2034 printk("| Locking API testsuite:\n");
2035 printk("----------------------------------------------------------------------------\n");
2036 printk(" | spin |wlock |rlock |mutex | wsem | rsem |\n");
2037 printk(" --------------------------------------------------------------------------\n");
2038
2039 init_shared_classes();
2040 debug_locks_silent = !debug_locks_verbose;
cdc84d79 2041 lockdep_set_selftest_task(current);
cae2ed9a 2042
6c9076ec 2043 DO_TESTCASE_6R("A-A deadlock", AA);
cae2ed9a
IM		 2044 DO_TESTCASE_6R("A-B-B-A deadlock", ABBA);
2045 DO_TESTCASE_6R("A-B-B-C-C-A deadlock", ABBCCA);
2046 DO_TESTCASE_6R("A-B-C-A-B-C deadlock", ABCABC);
2047 DO_TESTCASE_6R("A-B-B-C-C-D-D-A deadlock", ABBCCDDA);
2048 DO_TESTCASE_6R("A-B-C-D-B-D-D-A deadlock", ABCDBDDA);
2049 DO_TESTCASE_6R("A-B-C-D-B-C-D-A deadlock", ABCDBCDA);
2050 DO_TESTCASE_6("double unlock", double_unlock);
2051 DO_TESTCASE_6("initialize held", init_held);
cae2ed9a
IM		 2052
2053 printk(" --------------------------------------------------------------------------\n");
2054 print_testname("recursive read-lock");
25139409 2055 pr_cont(" |");
cae2ed9a 2056 dotest(rlock_AA1, SUCCESS, LOCKTYPE_RWLOCK);
25139409 2057 pr_cont(" |");
cae2ed9a 2058 dotest(rsem_AA1, FAILURE, LOCKTYPE_RWSEM);
25139409 2059 pr_cont("\n");
cae2ed9a
IM		 2060
2061 print_testname("recursive read-lock #2");
25139409 2062 pr_cont(" |");
6c9076ec 2063 dotest(rlock_AA1B, SUCCESS, LOCKTYPE_RWLOCK);
25139409 2064 pr_cont(" |");
cae2ed9a 2065 dotest(rsem_AA1B, FAILURE, LOCKTYPE_RWSEM);
25139409 2066 pr_cont("\n");
cae2ed9a
IM		 2067
2068 print_testname("mixed read-write-lock");
25139409 2069 pr_cont(" |");
cae2ed9a 2070 dotest(rlock_AA2, FAILURE, LOCKTYPE_RWLOCK);
25139409 2071 pr_cont(" |");
cae2ed9a 2072 dotest(rsem_AA2, FAILURE, LOCKTYPE_RWSEM);
25139409 2073 pr_cont("\n");
cae2ed9a
IM		 2074
2075 print_testname("mixed write-read-lock");
25139409 2076 pr_cont(" |");
cae2ed9a 2077 dotest(rlock_AA3, FAILURE, LOCKTYPE_RWLOCK);
25139409 2078 pr_cont(" |");
cae2ed9a 2079 dotest(rsem_AA3, FAILURE, LOCKTYPE_RWSEM);
25139409 2080 pr_cont("\n");
cae2ed9a 2081
e9149858
PZ		 2082 print_testname("mixed read-lock/lock-write ABBA");
2083 pr_cont(" |");
2084 dotest(rlock_ABBA1, FAILURE, LOCKTYPE_RWLOCK);
c7e2f69d 2085#ifdef CONFIG_PROVE_LOCKING
d82fed75
PZ		 2086 /*
2087 * Lockdep does indeed fail here, but there's nothing we can do about
2088 * that now. Don't kill lockdep for it.
2089 */
2090 unexpected_testcase_failures--;
c7e2f69d 2091#endif
d82fed75 2092
e9149858
PZ		 2093 pr_cont(" |");
2094 dotest(rwsem_ABBA1, FAILURE, LOCKTYPE_RWSEM);
2095
2096 print_testname("mixed read-lock/lock-read ABBA");
2097 pr_cont(" |");
2098 dotest(rlock_ABBA2, SUCCESS, LOCKTYPE_RWLOCK);
2099 pr_cont(" |");
2100 dotest(rwsem_ABBA2, FAILURE, LOCKTYPE_RWSEM);
2101
2102 print_testname("mixed write-lock/lock-write ABBA");
2103 pr_cont(" |");
2104 dotest(rlock_ABBA3, FAILURE, LOCKTYPE_RWLOCK);
2105 pr_cont(" |");
2106 dotest(rwsem_ABBA3, FAILURE, LOCKTYPE_RWSEM);
2107
d4f200e5
BF		 2108 print_testname("chain cached mixed R-L/L-W ABBA");
2109 pr_cont(" |");
2110 dotest(rlock_chaincache_ABBA1, FAILURE, LOCKTYPE_RWLOCK);
2111
cae2ed9a
IM		 2112 printk(" --------------------------------------------------------------------------\n");
2113
2114 /*
2115 * irq-context testcases:
2116 */
2117 DO_TESTCASE_2x6("irqs-on + irq-safe-A", irqsafe1);
2118 DO_TESTCASE_2x3("sirq-safe-A => hirqs-on", irqsafe2A);
2119 DO_TESTCASE_2x6("safe-A + irqs-on", irqsafe2B);
2120 DO_TESTCASE_6x6("safe-A + unsafe-B #1", irqsafe3);
2121 DO_TESTCASE_6x6("safe-A + unsafe-B #2", irqsafe4);
2122 DO_TESTCASE_6x6RW("irq lock-inversion", irq_inversion);
2123
2124 DO_TESTCASE_6x2("irq read-recursion", irq_read_recursion);
2125// DO_TESTCASE_6x2B("irq read-recursion #2", irq_read_recursion2);
2126
1de99445
ML		 2127 ww_tests();
2128
e9181886
BF		 2129 force_read_lock_recursive = 0;
2130 /*
2131 * queued_read_lock() specific test cases can be put here
2132 */
2133
cae2ed9a
IM		 2134 if (unexpected_testcase_failures) {
2135 printk("-----------------------------------------------------------------\n");
2136 debug_locks = 0;
2137 printk("BUG: %3d unexpected failures (out of %3d) - debugging disabled! |\n",
2138 unexpected_testcase_failures, testcase_total);
2139 printk("-----------------------------------------------------------------\n");
2140 } else if (expected_testcase_failures && testcase_successes) {
2141 printk("--------------------------------------------------------\n");
2142 printk("%3d out of %3d testcases failed, as expected. |\n",
2143 expected_testcase_failures, testcase_total);
2144 printk("----------------------------------------------------\n");
2145 debug_locks = 1;
2146 } else if (expected_testcase_failures && !testcase_successes) {
2147 printk("--------------------------------------------------------\n");
2148 printk("All %3d testcases failed, as expected. |\n",
2149 expected_testcase_failures);
2150 printk("----------------------------------------\n");
2151 debug_locks = 1;
2152 } else {
2153 printk("-------------------------------------------------------\n");
2154 printk("Good, all %3d testcases passed! |\n",
2155 testcase_successes);
2156 printk("---------------------------------\n");
2157 debug_locks = 1;
2158 }
cdc84d79 2159 lockdep_set_selftest_task(NULL);
cae2ed9a
IM		 2160 debug_locks_silent = 0;
2161}
Linux 6.x block layer and io_uring tree(s)