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lockdep/selftest: Unleash irq_read_recursion2 and add more
[mirror_ubuntu-hirsute-kernel.git] / lib / locking-selftest.c
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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(); \
31e0d747 1056 LOCK(A); \
cae2ed9a
IM		 1057 L(B); \
1058 U(B); \
31e0d747 1059 UNLOCK(A); \
cae2ed9a
IM		 1060 IRQ_EXIT();
1061
1062/*
31e0d747 1063 * Generate 24 testcases:
cae2ed9a
IM		 1064 */
1065#include "locking-selftest-hardirq.h"
31e0d747
BF		 1066#include "locking-selftest-rlock.h"
1067GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_hard_rlock)
1068
1069#include "locking-selftest-wlock.h"
1070GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_hard_wlock)
cae2ed9a
IM		 1071
1072#include "locking-selftest-softirq.h"
31e0d747
BF		 1073#include "locking-selftest-rlock.h"
1074GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_soft_rlock)
1075
1076#include "locking-selftest-wlock.h"
1077GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_soft_wlock)
cae2ed9a
IM		 1078
1079#undef E1
1080#undef E2
1081#undef E3
1082
1083/*
1084 * read-lock / write-lock recursion that is unsafe.
1085 */
1086
1087#define E1() \
1088 \
1089 IRQ_DISABLE(); \
1090 L(B); \
31e0d747
BF		 1091 LOCK(A); \
1092 UNLOCK(A); \
cae2ed9a
IM		 1093 U(B); \
1094 IRQ_ENABLE();
1095
1096#define E2() \
1097 \
1098 RL(A); \
1099 RU(A); \
1100
1101#define E3() \
1102 \
1103 IRQ_ENTER(); \
1104 L(B); \
1105 U(B); \
1106 IRQ_EXIT();
1107
1108/*
31e0d747 1109 * Generate 24 testcases:
cae2ed9a
IM		 1110 */
1111#include "locking-selftest-hardirq.h"
31e0d747
BF		 1112#include "locking-selftest-rlock.h"
1113GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion2_hard_rlock)
1114
1115#include "locking-selftest-wlock.h"
1116GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion2_hard_wlock)
cae2ed9a
IM		 1117
1118#include "locking-selftest-softirq.h"
31e0d747
BF		 1119#include "locking-selftest-rlock.h"
1120GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion2_soft_rlock)
1121
1122#include "locking-selftest-wlock.h"
1123GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion2_soft_wlock)
cae2ed9a 1124
cae2ed9a
IM		 1125#ifdef CONFIG_DEBUG_LOCK_ALLOC
1126# define I_SPINLOCK(x) lockdep_reset_lock(&lock_##x.dep_map)
1127# define I_RWLOCK(x) lockdep_reset_lock(&rwlock_##x.dep_map)
1128# define I_MUTEX(x) lockdep_reset_lock(&mutex_##x.dep_map)
1129# define I_RWSEM(x) lockdep_reset_lock(&rwsem_##x.dep_map)
1de99445 1130# define I_WW(x) lockdep_reset_lock(&x.dep_map)
018956d6
PZ		 1131#ifdef CONFIG_RT_MUTEXES
1132# define I_RTMUTEX(x) lockdep_reset_lock(&rtmutex_##x.dep_map)
1133#endif
cae2ed9a
IM		 1134#else
1135# define I_SPINLOCK(x)
1136# define I_RWLOCK(x)
1137# define I_MUTEX(x)
1138# define I_RWSEM(x)
1de99445 1139# define I_WW(x)
cae2ed9a
IM		 1140#endif
1141
018956d6
PZ		 1142#ifndef I_RTMUTEX
1143# define I_RTMUTEX(x)
1144#endif
1145
1146#ifdef CONFIG_RT_MUTEXES
1147#define I2_RTMUTEX(x) rt_mutex_init(&rtmutex_##x)
1148#else
1149#define I2_RTMUTEX(x)
1150#endif
1151
cae2ed9a
IM		 1152#define I1(x) \
1153 do { \
1154 I_SPINLOCK(x); \
1155 I_RWLOCK(x); \
1156 I_MUTEX(x); \
1157 I_RWSEM(x); \
018956d6 1158 I_RTMUTEX(x); \
cae2ed9a
IM		 1159 } while (0)
1160
1161#define I2(x) \
1162 do { \
9fb1b90c 1163 raw_spin_lock_init(&lock_##x); \
cae2ed9a
IM		 1164 rwlock_init(&rwlock_##x); \
1165 mutex_init(&mutex_##x); \
1166 init_rwsem(&rwsem_##x); \
018956d6 1167 I2_RTMUTEX(x); \
cae2ed9a
IM		 1168 } while (0)
1169
1170static void reset_locks(void)
1171{
1172 local_irq_disable();
1de99445
ML		 1173 lockdep_free_key_range(&ww_lockdep.acquire_key, 1);
1174 lockdep_free_key_range(&ww_lockdep.mutex_key, 1);
1175
cae2ed9a
IM		 1176 I1(A); I1(B); I1(C); I1(D);
1177 I1(X1); I1(X2); I1(Y1); I1(Y2); I1(Z1); I1(Z2);
f3cf139e 1178 I_WW(t); I_WW(t2); I_WW(o.base); I_WW(o2.base); I_WW(o3.base);
cae2ed9a
IM		 1179 lockdep_reset();
1180 I2(A); I2(B); I2(C); I2(D);
1181 init_shared_classes();
1de99445 1182
f3cf139e 1183 ww_mutex_init(&o, &ww_lockdep); ww_mutex_init(&o2, &ww_lockdep); ww_mutex_init(&o3, &ww_lockdep);
1de99445
ML		 1184 memset(&t, 0, sizeof(t)); memset(&t2, 0, sizeof(t2));
1185 memset(&ww_lockdep.acquire_key, 0, sizeof(ww_lockdep.acquire_key));
1186 memset(&ww_lockdep.mutex_key, 0, sizeof(ww_lockdep.mutex_key));
cae2ed9a
IM		 1187 local_irq_enable();
1188}
1189
1190#undef I
1191
1192static int testcase_total;
1193static int testcase_successes;
1194static int expected_testcase_failures;
1195static int unexpected_testcase_failures;
1196
1197static void dotest(void (*testcase_fn)(void), int expected, int lockclass_mask)
1198{
1199 unsigned long saved_preempt_count = preempt_count();
cae2ed9a
IM		 1200
1201 WARN_ON(irqs_disabled());
1202
1203 testcase_fn();
1204 /*
1205 * Filter out expected failures:
1206 */
1207#ifndef CONFIG_PROVE_LOCKING
166989e3 1208 if (expected == FAILURE && debug_locks) {
1de99445 1209 expected_testcase_failures++;
25139409 1210 pr_cont("failed|");
166989e3
ML		 1211 }
1212 else
1213#endif
1214 if (debug_locks != expected) {
1de99445 1215 unexpected_testcase_failures++;
25139409 1216 pr_cont("FAILED|");
cae2ed9a
IM		 1217 } else {
1218 testcase_successes++;
25139409 1219 pr_cont(" ok |");
cae2ed9a
IM		 1220 }
1221 testcase_total++;
1222
1223 if (debug_locks_verbose)
25139409 1224 pr_cont(" lockclass mask: %x, debug_locks: %d, expected: %d\n",
cae2ed9a
IM		 1225 lockclass_mask, debug_locks, expected);
1226 /*
1227 * Some tests (e.g. double-unlock) might corrupt the preemption
1228 * count, so restore it:
1229 */
4a2b4b22 1230 preempt_count_set(saved_preempt_count);
cae2ed9a
IM		 1231#ifdef CONFIG_TRACE_IRQFLAGS
1232 if (softirq_count())
1233 current->softirqs_enabled = 0;
1234 else
1235 current->softirqs_enabled = 1;
1236#endif
1237
1238 reset_locks();
1239}
1240
018956d6
PZ		 1241#ifdef CONFIG_RT_MUTEXES
1242#define dotest_rt(fn, e, m) dotest((fn), (e), (m))
1243#else
1244#define dotest_rt(fn, e, m)
1245#endif
1246
cae2ed9a
IM		 1247static inline void print_testname(const char *testname)
1248{
1249 printk("%33s:", testname);
1250}
1251
1252#define DO_TESTCASE_1(desc, name, nr) \
1253 print_testname(desc"/"#nr); \
1254 dotest(name##_##nr, SUCCESS, LOCKTYPE_RWLOCK); \
25139409 1255 pr_cont("\n");
cae2ed9a
IM		 1256
1257#define DO_TESTCASE_1B(desc, name, nr) \
1258 print_testname(desc"/"#nr); \
1259 dotest(name##_##nr, FAILURE, LOCKTYPE_RWLOCK); \
25139409 1260 pr_cont("\n");
cae2ed9a
IM		 1261
1262#define DO_TESTCASE_3(desc, name, nr) \
1263 print_testname(desc"/"#nr); \
1264 dotest(name##_spin_##nr, FAILURE, LOCKTYPE_SPIN); \
1265 dotest(name##_wlock_##nr, FAILURE, LOCKTYPE_RWLOCK); \
1266 dotest(name##_rlock_##nr, SUCCESS, LOCKTYPE_RWLOCK); \
25139409 1267 pr_cont("\n");
cae2ed9a
IM		 1268
1269#define DO_TESTCASE_3RW(desc, name, nr) \
1270 print_testname(desc"/"#nr); \
1271 dotest(name##_spin_##nr, FAILURE, LOCKTYPE_SPIN|LOCKTYPE_RWLOCK);\
1272 dotest(name##_wlock_##nr, FAILURE, LOCKTYPE_RWLOCK); \
1273 dotest(name##_rlock_##nr, SUCCESS, LOCKTYPE_RWLOCK); \
25139409 1274 pr_cont("\n");
cae2ed9a 1275
31e0d747
BF		 1276#define DO_TESTCASE_2RW(desc, name, nr) \
1277 print_testname(desc"/"#nr); \
1278 pr_cont(" |"); \
1279 dotest(name##_wlock_##nr, FAILURE, LOCKTYPE_RWLOCK); \
1280 dotest(name##_rlock_##nr, SUCCESS, LOCKTYPE_RWLOCK); \
1281 pr_cont("\n");
1282
1283#define DO_TESTCASE_2x2RW(desc, name, nr) \
1284 DO_TESTCASE_2RW("hard-"desc, name##_hard, nr) \
1285 DO_TESTCASE_2RW("soft-"desc, name##_soft, nr) \
1286
1287#define DO_TESTCASE_6x2x2RW(desc, name) \
1288 DO_TESTCASE_2x2RW(desc, name, 123); \
1289 DO_TESTCASE_2x2RW(desc, name, 132); \
1290 DO_TESTCASE_2x2RW(desc, name, 213); \
1291 DO_TESTCASE_2x2RW(desc, name, 231); \
1292 DO_TESTCASE_2x2RW(desc, name, 312); \
1293 DO_TESTCASE_2x2RW(desc, name, 321);
1294
cae2ed9a
IM		 1295#define DO_TESTCASE_6(desc, name) \
1296 print_testname(desc); \
1297 dotest(name##_spin, FAILURE, LOCKTYPE_SPIN); \
1298 dotest(name##_wlock, FAILURE, LOCKTYPE_RWLOCK); \
1299 dotest(name##_rlock, FAILURE, LOCKTYPE_RWLOCK); \
1300 dotest(name##_mutex, FAILURE, LOCKTYPE_MUTEX); \
1301 dotest(name##_wsem, FAILURE, LOCKTYPE_RWSEM); \
1302 dotest(name##_rsem, FAILURE, LOCKTYPE_RWSEM); \
018956d6 1303 dotest_rt(name##_rtmutex, FAILURE, LOCKTYPE_RTMUTEX); \
25139409 1304 pr_cont("\n");
cae2ed9a
IM		 1305
1306#define DO_TESTCASE_6_SUCCESS(desc, name) \
1307 print_testname(desc); \
1308 dotest(name##_spin, SUCCESS, LOCKTYPE_SPIN); \
1309 dotest(name##_wlock, SUCCESS, LOCKTYPE_RWLOCK); \
1310 dotest(name##_rlock, SUCCESS, LOCKTYPE_RWLOCK); \
1311 dotest(name##_mutex, SUCCESS, LOCKTYPE_MUTEX); \
1312 dotest(name##_wsem, SUCCESS, LOCKTYPE_RWSEM); \
1313 dotest(name##_rsem, SUCCESS, LOCKTYPE_RWSEM); \
018956d6 1314 dotest_rt(name##_rtmutex, SUCCESS, LOCKTYPE_RTMUTEX); \
25139409 1315 pr_cont("\n");
cae2ed9a
IM		 1316
1317/*
1318 * 'read' variant: rlocks must not trigger.
1319 */
1320#define DO_TESTCASE_6R(desc, name) \
1321 print_testname(desc); \
1322 dotest(name##_spin, FAILURE, LOCKTYPE_SPIN); \
1323 dotest(name##_wlock, FAILURE, LOCKTYPE_RWLOCK); \
1324 dotest(name##_rlock, SUCCESS, LOCKTYPE_RWLOCK); \
1325 dotest(name##_mutex, FAILURE, LOCKTYPE_MUTEX); \
1326 dotest(name##_wsem, FAILURE, LOCKTYPE_RWSEM); \
1327 dotest(name##_rsem, FAILURE, LOCKTYPE_RWSEM); \
018956d6 1328 dotest_rt(name##_rtmutex, FAILURE, LOCKTYPE_RTMUTEX); \
25139409 1329 pr_cont("\n");
cae2ed9a
IM		 1330
1331#define DO_TESTCASE_2I(desc, name, nr) \
1332 DO_TESTCASE_1("hard-"desc, name##_hard, nr); \
1333 DO_TESTCASE_1("soft-"desc, name##_soft, nr);
1334
1335#define DO_TESTCASE_2IB(desc, name, nr) \
1336 DO_TESTCASE_1B("hard-"desc, name##_hard, nr); \
1337 DO_TESTCASE_1B("soft-"desc, name##_soft, nr);
1338
1339#define DO_TESTCASE_6I(desc, name, nr) \
1340 DO_TESTCASE_3("hard-"desc, name##_hard, nr); \
1341 DO_TESTCASE_3("soft-"desc, name##_soft, nr);
1342
1343#define DO_TESTCASE_6IRW(desc, name, nr) \
1344 DO_TESTCASE_3RW("hard-"desc, name##_hard, nr); \
1345 DO_TESTCASE_3RW("soft-"desc, name##_soft, nr);
1346
1347#define DO_TESTCASE_2x3(desc, name) \
1348 DO_TESTCASE_3(desc, name, 12); \
1349 DO_TESTCASE_3(desc, name, 21);
1350
1351#define DO_TESTCASE_2x6(desc, name) \
1352 DO_TESTCASE_6I(desc, name, 12); \
1353 DO_TESTCASE_6I(desc, name, 21);
1354
1355#define DO_TESTCASE_6x2(desc, name) \
1356 DO_TESTCASE_2I(desc, name, 123); \
1357 DO_TESTCASE_2I(desc, name, 132); \
1358 DO_TESTCASE_2I(desc, name, 213); \
1359 DO_TESTCASE_2I(desc, name, 231); \
1360 DO_TESTCASE_2I(desc, name, 312); \
1361 DO_TESTCASE_2I(desc, name, 321);
1362
1363#define DO_TESTCASE_6x2B(desc, name) \
1364 DO_TESTCASE_2IB(desc, name, 123); \
1365 DO_TESTCASE_2IB(desc, name, 132); \
1366 DO_TESTCASE_2IB(desc, name, 213); \
1367 DO_TESTCASE_2IB(desc, name, 231); \
1368 DO_TESTCASE_2IB(desc, name, 312); \
1369 DO_TESTCASE_2IB(desc, name, 321);
1370
1371#define DO_TESTCASE_6x6(desc, name) \
1372 DO_TESTCASE_6I(desc, name, 123); \
1373 DO_TESTCASE_6I(desc, name, 132); \
1374 DO_TESTCASE_6I(desc, name, 213); \
1375 DO_TESTCASE_6I(desc, name, 231); \
1376 DO_TESTCASE_6I(desc, name, 312); \
1377 DO_TESTCASE_6I(desc, name, 321);
1378
1379#define DO_TESTCASE_6x6RW(desc, name) \
1380 DO_TESTCASE_6IRW(desc, name, 123); \
1381 DO_TESTCASE_6IRW(desc, name, 132); \
1382 DO_TESTCASE_6IRW(desc, name, 213); \
1383 DO_TESTCASE_6IRW(desc, name, 231); \
1384 DO_TESTCASE_6IRW(desc, name, 312); \
1385 DO_TESTCASE_6IRW(desc, name, 321);
1386
1de99445
ML		 1387static void ww_test_fail_acquire(void)
1388{
1389 int ret;
1390
1391 WWAI(&t);
1392 t.stamp++;
1393
1394 ret = WWL(&o, &t);
1395
1396 if (WARN_ON(!o.ctx) ||
1397 WARN_ON(ret))
1398 return;
1399
1400 /* No lockdep test, pure API */
1401 ret = WWL(&o, &t);
1402 WARN_ON(ret != -EALREADY);
1403
1404 ret = WWT(&o);
1405 WARN_ON(ret);
1406
1407 t2 = t;
1408 t2.stamp++;
1409 ret = WWL(&o, &t2);
1410 WARN_ON(ret != -EDEADLK);
1411 WWU(&o);
1412
1413 if (WWT(&o))
1414 WWU(&o);
1415#ifdef CONFIG_DEBUG_LOCK_ALLOC
1416 else
1417 DEBUG_LOCKS_WARN_ON(1);
1418#endif
1419}
1420
2fe3d4b1
ML		 1421static void ww_test_normal(void)
1422{
1423 int ret;
1424
1425 WWAI(&t);
1426
1427 /*
1428 * None of the ww_mutex codepaths should be taken in the 'normal'
1429 * mutex calls. The easiest way to verify this is by using the
1430 * normal mutex calls, and making sure o.ctx is unmodified.
1431 */
1432
1433 /* mutex_lock (and indirectly, mutex_lock_nested) */
1434 o.ctx = (void *)~0UL;
1435 mutex_lock(&o.base);
1436 mutex_unlock(&o.base);
1437 WARN_ON(o.ctx != (void *)~0UL);
1438
1439 /* mutex_lock_interruptible (and *_nested) */
1440 o.ctx = (void *)~0UL;
1441 ret = mutex_lock_interruptible(&o.base);
1442 if (!ret)
1443 mutex_unlock(&o.base);
1444 else
1445 WARN_ON(1);
1446 WARN_ON(o.ctx != (void *)~0UL);
1447
1448 /* mutex_lock_killable (and *_nested) */
1449 o.ctx = (void *)~0UL;
1450 ret = mutex_lock_killable(&o.base);
1451 if (!ret)
1452 mutex_unlock(&o.base);
1453 else
1454 WARN_ON(1);
1455 WARN_ON(o.ctx != (void *)~0UL);
1456
1457 /* trylock, succeeding */
1458 o.ctx = (void *)~0UL;
1459 ret = mutex_trylock(&o.base);
1460 WARN_ON(!ret);
1461 if (ret)
1462 mutex_unlock(&o.base);
1463 else
1464 WARN_ON(1);
1465 WARN_ON(o.ctx != (void *)~0UL);
1466
1467 /* trylock, failing */
1468 o.ctx = (void *)~0UL;
1469 mutex_lock(&o.base);
1470 ret = mutex_trylock(&o.base);
1471 WARN_ON(ret);
1472 mutex_unlock(&o.base);
1473 WARN_ON(o.ctx != (void *)~0UL);
1474
1475 /* nest_lock */
1476 o.ctx = (void *)~0UL;
1477 mutex_lock_nest_lock(&o.base, &t);
1478 mutex_unlock(&o.base);
1479 WARN_ON(o.ctx != (void *)~0UL);
1480}
1481
1de99445
ML		 1482static void ww_test_two_contexts(void)
1483{
1484 WWAI(&t);
1485 WWAI(&t2);
1486}
1487
1488static void ww_test_diff_class(void)
1489{
1490 WWAI(&t);
1491#ifdef CONFIG_DEBUG_MUTEXES
1492 t.ww_class = NULL;
1493#endif
1494 WWL(&o, &t);
1495}
1496
1497static void ww_test_context_done_twice(void)
1498{
1499 WWAI(&t);
1500 WWAD(&t);
1501 WWAD(&t);
1502 WWAF(&t);
1503}
1504
1505static void ww_test_context_unlock_twice(void)
1506{
1507 WWAI(&t);
1508 WWAD(&t);
1509 WWAF(&t);
1510 WWAF(&t);
1511}
1512
1513static void ww_test_context_fini_early(void)
1514{
1515 WWAI(&t);
1516 WWL(&o, &t);
1517 WWAD(&t);
1518 WWAF(&t);
1519}
1520
1521static void ww_test_context_lock_after_done(void)
1522{
1523 WWAI(&t);
1524 WWAD(&t);
1525 WWL(&o, &t);
1526}
1527
1528static void ww_test_object_unlock_twice(void)
1529{
1530 WWL1(&o);
1531 WWU(&o);
1532 WWU(&o);
1533}
1534
1535static void ww_test_object_lock_unbalanced(void)
1536{
1537 WWAI(&t);
1538 WWL(&o, &t);
1539 t.acquired = 0;
1540 WWU(&o);
1541 WWAF(&t);
1542}
1543
1544static void ww_test_object_lock_stale_context(void)
1545{
1546 WWAI(&t);
1547 o.ctx = &t2;
1548 WWL(&o, &t);
1549}
1550
f3cf139e
ML		 1551static void ww_test_edeadlk_normal(void)
1552{
1553 int ret;
1554
1555 mutex_lock(&o2.base);
1556 o2.ctx = &t2;
5facae4f 1557 mutex_release(&o2.base.dep_map, _THIS_IP_);
f3cf139e
ML		 1558
1559 WWAI(&t);
1560 t2 = t;
1561 t2.stamp--;
1562
1563 ret = WWL(&o, &t);
1564 WARN_ON(ret);
1565
1566 ret = WWL(&o2, &t);
1567 WARN_ON(ret != -EDEADLK);
1568
1569 o2.ctx = NULL;
1570 mutex_acquire(&o2.base.dep_map, 0, 1, _THIS_IP_);
1571 mutex_unlock(&o2.base);
1572 WWU(&o);
1573
1574 WWL(&o2, &t);
1575}
1576
1577static void ww_test_edeadlk_normal_slow(void)
1578{
1579 int ret;
1580
1581 mutex_lock(&o2.base);
5facae4f 1582 mutex_release(&o2.base.dep_map, _THIS_IP_);
f3cf139e
ML		 1583 o2.ctx = &t2;
1584
1585 WWAI(&t);
1586 t2 = t;
1587 t2.stamp--;
1588
1589 ret = WWL(&o, &t);
1590 WARN_ON(ret);
1591
1592 ret = WWL(&o2, &t);
1593 WARN_ON(ret != -EDEADLK);
1594
1595 o2.ctx = NULL;
1596 mutex_acquire(&o2.base.dep_map, 0, 1, _THIS_IP_);
1597 mutex_unlock(&o2.base);
1598 WWU(&o);
1599
1600 ww_mutex_lock_slow(&o2, &t);
1601}
1602
1603static void ww_test_edeadlk_no_unlock(void)
1604{
1605 int ret;
1606
1607 mutex_lock(&o2.base);
1608 o2.ctx = &t2;
5facae4f 1609 mutex_release(&o2.base.dep_map, _THIS_IP_);
f3cf139e
ML		 1610
1611 WWAI(&t);
1612 t2 = t;
1613 t2.stamp--;
1614
1615 ret = WWL(&o, &t);
1616 WARN_ON(ret);
1617
1618 ret = WWL(&o2, &t);
1619 WARN_ON(ret != -EDEADLK);
1620
1621 o2.ctx = NULL;
1622 mutex_acquire(&o2.base.dep_map, 0, 1, _THIS_IP_);
1623 mutex_unlock(&o2.base);
1624
1625 WWL(&o2, &t);
1626}
1627
1628static void ww_test_edeadlk_no_unlock_slow(void)
1629{
1630 int ret;
1631
1632 mutex_lock(&o2.base);
5facae4f 1633 mutex_release(&o2.base.dep_map, _THIS_IP_);
f3cf139e
ML		 1634 o2.ctx = &t2;
1635
1636 WWAI(&t);
1637 t2 = t;
1638 t2.stamp--;
1639
1640 ret = WWL(&o, &t);
1641 WARN_ON(ret);
1642
1643 ret = WWL(&o2, &t);
1644 WARN_ON(ret != -EDEADLK);
1645
1646 o2.ctx = NULL;
1647 mutex_acquire(&o2.base.dep_map, 0, 1, _THIS_IP_);
1648 mutex_unlock(&o2.base);
1649
1650 ww_mutex_lock_slow(&o2, &t);
1651}
1652
1653static void ww_test_edeadlk_acquire_more(void)
1654{
1655 int ret;
1656
1657 mutex_lock(&o2.base);
5facae4f 1658 mutex_release(&o2.base.dep_map, _THIS_IP_);
f3cf139e
ML		 1659 o2.ctx = &t2;
1660
1661 WWAI(&t);
1662 t2 = t;
1663 t2.stamp--;
1664
1665 ret = WWL(&o, &t);
1666 WARN_ON(ret);
1667
1668 ret = WWL(&o2, &t);
1669 WARN_ON(ret != -EDEADLK);
1670
1671 ret = WWL(&o3, &t);
1672}
1673
1674static void ww_test_edeadlk_acquire_more_slow(void)
1675{
1676 int ret;
1677
1678 mutex_lock(&o2.base);
5facae4f 1679 mutex_release(&o2.base.dep_map, _THIS_IP_);
f3cf139e
ML		 1680 o2.ctx = &t2;
1681
1682 WWAI(&t);
1683 t2 = t;
1684 t2.stamp--;
1685
1686 ret = WWL(&o, &t);
1687 WARN_ON(ret);
1688
1689 ret = WWL(&o2, &t);
1690 WARN_ON(ret != -EDEADLK);
1691
1692 ww_mutex_lock_slow(&o3, &t);
1693}
1694
1695static void ww_test_edeadlk_acquire_more_edeadlk(void)
1696{
1697 int ret;
1698
1699 mutex_lock(&o2.base);
5facae4f 1700 mutex_release(&o2.base.dep_map, _THIS_IP_);
f3cf139e
ML		 1701 o2.ctx = &t2;
1702
1703 mutex_lock(&o3.base);
5facae4f 1704 mutex_release(&o3.base.dep_map, _THIS_IP_);
f3cf139e
ML		 1705 o3.ctx = &t2;
1706
1707 WWAI(&t);
1708 t2 = t;
1709 t2.stamp--;
1710
1711 ret = WWL(&o, &t);
1712 WARN_ON(ret);
1713
1714 ret = WWL(&o2, &t);
1715 WARN_ON(ret != -EDEADLK);
1716
1717 ret = WWL(&o3, &t);
1718 WARN_ON(ret != -EDEADLK);
1719}
1720
1721static void ww_test_edeadlk_acquire_more_edeadlk_slow(void)
1722{
1723 int ret;
1724
1725 mutex_lock(&o2.base);
5facae4f 1726 mutex_release(&o2.base.dep_map, _THIS_IP_);
f3cf139e
ML		 1727 o2.ctx = &t2;
1728
1729 mutex_lock(&o3.base);
5facae4f 1730 mutex_release(&o3.base.dep_map, _THIS_IP_);
f3cf139e
ML		 1731 o3.ctx = &t2;
1732
1733 WWAI(&t);
1734 t2 = t;
1735 t2.stamp--;
1736
1737 ret = WWL(&o, &t);
1738 WARN_ON(ret);
1739
1740 ret = WWL(&o2, &t);
1741 WARN_ON(ret != -EDEADLK);
1742
1743 ww_mutex_lock_slow(&o3, &t);
1744}
1745
1746static void ww_test_edeadlk_acquire_wrong(void)
1747{
1748 int ret;
1749
1750 mutex_lock(&o2.base);
5facae4f 1751 mutex_release(&o2.base.dep_map, _THIS_IP_);
f3cf139e
ML		 1752 o2.ctx = &t2;
1753
1754 WWAI(&t);
1755 t2 = t;
1756 t2.stamp--;
1757
1758 ret = WWL(&o, &t);
1759 WARN_ON(ret);
1760
1761 ret = WWL(&o2, &t);
1762 WARN_ON(ret != -EDEADLK);
1763 if (!ret)
1764 WWU(&o2);
1765
1766 WWU(&o);
1767
1768 ret = WWL(&o3, &t);
1769}
1770
1771static void ww_test_edeadlk_acquire_wrong_slow(void)
1772{
1773 int ret;
1774
1775 mutex_lock(&o2.base);
5facae4f 1776 mutex_release(&o2.base.dep_map, _THIS_IP_);
f3cf139e
ML		 1777 o2.ctx = &t2;
1778
1779 WWAI(&t);
1780 t2 = t;
1781 t2.stamp--;
1782
1783 ret = WWL(&o, &t);
1784 WARN_ON(ret);
1785
1786 ret = WWL(&o2, &t);
1787 WARN_ON(ret != -EDEADLK);
1788 if (!ret)
1789 WWU(&o2);
1790
1791 WWU(&o);
1792
1793 ww_mutex_lock_slow(&o3, &t);
1794}
1795
1de99445
ML		 1796static void ww_test_spin_nest_unlocked(void)
1797{
1798 raw_spin_lock_nest_lock(&lock_A, &o.base);
1799 U(A);
1800}
1801
1802static void ww_test_unneeded_slow(void)
1803{
1804 WWAI(&t);
1805
1806 ww_mutex_lock_slow(&o, &t);
1807}
1808
1809static void ww_test_context_block(void)
1810{
1811 int ret;
1812
1813 WWAI(&t);
1814
1815 ret = WWL(&o, &t);
1816 WARN_ON(ret);
1817 WWL1(&o2);
1818}
1819
1820static void ww_test_context_try(void)
1821{
1822 int ret;
1823
1824 WWAI(&t);
1825
1826 ret = WWL(&o, &t);
1827 WARN_ON(ret);
1828
1829 ret = WWT(&o2);
1830 WARN_ON(!ret);
1831 WWU(&o2);
1832 WWU(&o);
1833}
1834
1835static void ww_test_context_context(void)
1836{
1837 int ret;
1838
1839 WWAI(&t);
1840
1841 ret = WWL(&o, &t);
1842 WARN_ON(ret);
1843
1844 ret = WWL(&o2, &t);
1845 WARN_ON(ret);
1846
1847 WWU(&o2);
1848 WWU(&o);
1849}
1850
1851static void ww_test_try_block(void)
1852{
1853 bool ret;
1854
1855 ret = WWT(&o);
1856 WARN_ON(!ret);
1857
1858 WWL1(&o2);
1859 WWU(&o2);
1860 WWU(&o);
1861}
1862
1863static void ww_test_try_try(void)
1864{
1865 bool ret;
1866
1867 ret = WWT(&o);
1868 WARN_ON(!ret);
1869 ret = WWT(&o2);
1870 WARN_ON(!ret);
1871 WWU(&o2);
1872 WWU(&o);
1873}
1874
1875static void ww_test_try_context(void)
1876{
1877 int ret;
1878
1879 ret = WWT(&o);
1880 WARN_ON(!ret);
1881
1882 WWAI(&t);
1883
1884 ret = WWL(&o2, &t);
1885 WARN_ON(ret);
1886}
1887
1888static void ww_test_block_block(void)
1889{
1890 WWL1(&o);
1891 WWL1(&o2);
1892}
1893
1894static void ww_test_block_try(void)
1895{
1896 bool ret;
1897
1898 WWL1(&o);
1899 ret = WWT(&o2);
1900 WARN_ON(!ret);
1901}
1902
1903static void ww_test_block_context(void)
1904{
1905 int ret;
1906
1907 WWL1(&o);
1908 WWAI(&t);
1909
1910 ret = WWL(&o2, &t);
1911 WARN_ON(ret);
1912}
1913
1914static void ww_test_spin_block(void)
1915{
1916 L(A);
1917 U(A);
1918
1919 WWL1(&o);
1920 L(A);
1921 U(A);
1922 WWU(&o);
1923
1924 L(A);
1925 WWL1(&o);
1926 WWU(&o);
1927 U(A);
1928}
1929
1930static void ww_test_spin_try(void)
1931{
1932 bool ret;
1933
1934 L(A);
1935 U(A);
1936
1937 ret = WWT(&o);
1938 WARN_ON(!ret);
1939 L(A);
1940 U(A);
1941 WWU(&o);
1942
1943 L(A);
1944 ret = WWT(&o);
1945 WARN_ON(!ret);
1946 WWU(&o);
1947 U(A);
1948}
1949
1950static void ww_test_spin_context(void)
1951{
1952 int ret;
1953
1954 L(A);
1955 U(A);
1956
1957 WWAI(&t);
1958
1959 ret = WWL(&o, &t);
1960 WARN_ON(ret);
1961 L(A);
1962 U(A);
1963 WWU(&o);
1964
1965 L(A);
1966 ret = WWL(&o, &t);
1967 WARN_ON(ret);
1968 WWU(&o);
1969 U(A);
1970}
1971
1972static void ww_tests(void)
1973{
1974 printk(" --------------------------------------------------------------------------\n");
1975 printk(" | Wound/wait tests |\n");
1976 printk(" ---------------------\n");
1977
1978 print_testname("ww api failures");
1979 dotest(ww_test_fail_acquire, SUCCESS, LOCKTYPE_WW);
2fe3d4b1 1980 dotest(ww_test_normal, SUCCESS, LOCKTYPE_WW);
1de99445 1981 dotest(ww_test_unneeded_slow, FAILURE, LOCKTYPE_WW);
25139409 1982 pr_cont("\n");
1de99445
ML		 1983
1984 print_testname("ww contexts mixing");
1985 dotest(ww_test_two_contexts, FAILURE, LOCKTYPE_WW);
1986 dotest(ww_test_diff_class, FAILURE, LOCKTYPE_WW);
25139409 1987 pr_cont("\n");
1de99445
ML		 1988
1989 print_testname("finishing ww context");
1990 dotest(ww_test_context_done_twice, FAILURE, LOCKTYPE_WW);
1991 dotest(ww_test_context_unlock_twice, FAILURE, LOCKTYPE_WW);
1992 dotest(ww_test_context_fini_early, FAILURE, LOCKTYPE_WW);
1993 dotest(ww_test_context_lock_after_done, FAILURE, LOCKTYPE_WW);
25139409 1994 pr_cont("\n");
1de99445
ML		 1995
1996 print_testname("locking mismatches");
1997 dotest(ww_test_object_unlock_twice, FAILURE, LOCKTYPE_WW);
1998 dotest(ww_test_object_lock_unbalanced, FAILURE, LOCKTYPE_WW);
1999 dotest(ww_test_object_lock_stale_context, FAILURE, LOCKTYPE_WW);
25139409 2000 pr_cont("\n");
1de99445 2001
f3cf139e
ML		 2002 print_testname("EDEADLK handling");
2003 dotest(ww_test_edeadlk_normal, SUCCESS, LOCKTYPE_WW);
2004 dotest(ww_test_edeadlk_normal_slow, SUCCESS, LOCKTYPE_WW);
2005 dotest(ww_test_edeadlk_no_unlock, FAILURE, LOCKTYPE_WW);
2006 dotest(ww_test_edeadlk_no_unlock_slow, FAILURE, LOCKTYPE_WW);
2007 dotest(ww_test_edeadlk_acquire_more, FAILURE, LOCKTYPE_WW);
2008 dotest(ww_test_edeadlk_acquire_more_slow, FAILURE, LOCKTYPE_WW);
2009 dotest(ww_test_edeadlk_acquire_more_edeadlk, FAILURE, LOCKTYPE_WW);
2010 dotest(ww_test_edeadlk_acquire_more_edeadlk_slow, FAILURE, LOCKTYPE_WW);
2011 dotest(ww_test_edeadlk_acquire_wrong, FAILURE, LOCKTYPE_WW);
2012 dotest(ww_test_edeadlk_acquire_wrong_slow, FAILURE, LOCKTYPE_WW);
25139409 2013 pr_cont("\n");
f3cf139e 2014
1de99445
ML		 2015 print_testname("spinlock nest unlocked");
2016 dotest(ww_test_spin_nest_unlocked, FAILURE, LOCKTYPE_WW);
25139409 2017 pr_cont("\n");
1de99445
ML		 2018
2019 printk(" -----------------------------------------------------\n");
2020 printk(" |block | try |context|\n");
2021 printk(" -----------------------------------------------------\n");
2022
2023 print_testname("context");
2024 dotest(ww_test_context_block, FAILURE, LOCKTYPE_WW);
2025 dotest(ww_test_context_try, SUCCESS, LOCKTYPE_WW);
2026 dotest(ww_test_context_context, SUCCESS, LOCKTYPE_WW);
25139409 2027 pr_cont("\n");
1de99445
ML		 2028
2029 print_testname("try");
2030 dotest(ww_test_try_block, FAILURE, LOCKTYPE_WW);
2031 dotest(ww_test_try_try, SUCCESS, LOCKTYPE_WW);
2032 dotest(ww_test_try_context, FAILURE, LOCKTYPE_WW);
25139409 2033 pr_cont("\n");
1de99445
ML		 2034
2035 print_testname("block");
2036 dotest(ww_test_block_block, FAILURE, LOCKTYPE_WW);
2037 dotest(ww_test_block_try, SUCCESS, LOCKTYPE_WW);
2038 dotest(ww_test_block_context, FAILURE, LOCKTYPE_WW);
25139409 2039 pr_cont("\n");
1de99445
ML		 2040
2041 print_testname("spinlock");
2042 dotest(ww_test_spin_block, FAILURE, LOCKTYPE_WW);
2043 dotest(ww_test_spin_try, SUCCESS, LOCKTYPE_WW);
2044 dotest(ww_test_spin_context, FAILURE, LOCKTYPE_WW);
25139409 2045 pr_cont("\n");
1de99445 2046}
cae2ed9a
IM		 2047
2048void locking_selftest(void)
2049{
2050 /*
2051 * Got a locking failure before the selftest ran?
2052 */
2053 if (!debug_locks) {
2054 printk("----------------------------------\n");
2055 printk("| Locking API testsuite disabled |\n");
2056 printk("----------------------------------\n");
2057 return;
2058 }
2059
e9181886
BF		 2060 /*
2061 * treats read_lock() as recursive read locks for testing purpose
2062 */
2063 force_read_lock_recursive = 1;
2064
cae2ed9a
IM		 2065 /*
2066 * Run the testsuite:
2067 */
2068 printk("------------------------\n");
2069 printk("| Locking API testsuite:\n");
2070 printk("----------------------------------------------------------------------------\n");
2071 printk(" | spin |wlock |rlock |mutex | wsem | rsem |\n");
2072 printk(" --------------------------------------------------------------------------\n");
2073
2074 init_shared_classes();
2075 debug_locks_silent = !debug_locks_verbose;
cdc84d79 2076 lockdep_set_selftest_task(current);
cae2ed9a 2077
6c9076ec 2078 DO_TESTCASE_6R("A-A deadlock", AA);
cae2ed9a
IM		 2079 DO_TESTCASE_6R("A-B-B-A deadlock", ABBA);
2080 DO_TESTCASE_6R("A-B-B-C-C-A deadlock", ABBCCA);
2081 DO_TESTCASE_6R("A-B-C-A-B-C deadlock", ABCABC);
2082 DO_TESTCASE_6R("A-B-B-C-C-D-D-A deadlock", ABBCCDDA);
2083 DO_TESTCASE_6R("A-B-C-D-B-D-D-A deadlock", ABCDBDDA);
2084 DO_TESTCASE_6R("A-B-C-D-B-C-D-A deadlock", ABCDBCDA);
2085 DO_TESTCASE_6("double unlock", double_unlock);
2086 DO_TESTCASE_6("initialize held", init_held);
cae2ed9a
IM		 2087
2088 printk(" --------------------------------------------------------------------------\n");
2089 print_testname("recursive read-lock");
25139409 2090 pr_cont(" |");
cae2ed9a 2091 dotest(rlock_AA1, SUCCESS, LOCKTYPE_RWLOCK);
25139409 2092 pr_cont(" |");
cae2ed9a 2093 dotest(rsem_AA1, FAILURE, LOCKTYPE_RWSEM);
25139409 2094 pr_cont("\n");
cae2ed9a
IM		 2095
2096 print_testname("recursive read-lock #2");
25139409 2097 pr_cont(" |");
6c9076ec 2098 dotest(rlock_AA1B, SUCCESS, LOCKTYPE_RWLOCK);
25139409 2099 pr_cont(" |");
cae2ed9a 2100 dotest(rsem_AA1B, FAILURE, LOCKTYPE_RWSEM);
25139409 2101 pr_cont("\n");
cae2ed9a
IM		 2102
2103 print_testname("mixed read-write-lock");
25139409 2104 pr_cont(" |");
cae2ed9a 2105 dotest(rlock_AA2, FAILURE, LOCKTYPE_RWLOCK);
25139409 2106 pr_cont(" |");
cae2ed9a 2107 dotest(rsem_AA2, FAILURE, LOCKTYPE_RWSEM);
25139409 2108 pr_cont("\n");
cae2ed9a
IM		 2109
2110 print_testname("mixed write-read-lock");
25139409 2111 pr_cont(" |");
cae2ed9a 2112 dotest(rlock_AA3, FAILURE, LOCKTYPE_RWLOCK);
25139409 2113 pr_cont(" |");
cae2ed9a 2114 dotest(rsem_AA3, FAILURE, LOCKTYPE_RWSEM);
25139409 2115 pr_cont("\n");
cae2ed9a 2116
e9149858
PZ		 2117 print_testname("mixed read-lock/lock-write ABBA");
2118 pr_cont(" |");
2119 dotest(rlock_ABBA1, FAILURE, LOCKTYPE_RWLOCK);
c7e2f69d 2120#ifdef CONFIG_PROVE_LOCKING
d82fed75
PZ		 2121 /*
2122 * Lockdep does indeed fail here, but there's nothing we can do about
2123 * that now. Don't kill lockdep for it.
2124 */
2125 unexpected_testcase_failures--;
c7e2f69d 2126#endif
d82fed75 2127
e9149858
PZ		 2128 pr_cont(" |");
2129 dotest(rwsem_ABBA1, FAILURE, LOCKTYPE_RWSEM);
2130
2131 print_testname("mixed read-lock/lock-read ABBA");
2132 pr_cont(" |");
2133 dotest(rlock_ABBA2, SUCCESS, LOCKTYPE_RWLOCK);
2134 pr_cont(" |");
2135 dotest(rwsem_ABBA2, FAILURE, LOCKTYPE_RWSEM);
2136
2137 print_testname("mixed write-lock/lock-write ABBA");
2138 pr_cont(" |");
2139 dotest(rlock_ABBA3, FAILURE, LOCKTYPE_RWLOCK);
2140 pr_cont(" |");
2141 dotest(rwsem_ABBA3, FAILURE, LOCKTYPE_RWSEM);
2142
d4f200e5
BF		 2143 print_testname("chain cached mixed R-L/L-W ABBA");
2144 pr_cont(" |");
2145 dotest(rlock_chaincache_ABBA1, FAILURE, LOCKTYPE_RWLOCK);
2146
cae2ed9a
IM		 2147 printk(" --------------------------------------------------------------------------\n");
2148
2149 /*
2150 * irq-context testcases:
2151 */
2152 DO_TESTCASE_2x6("irqs-on + irq-safe-A", irqsafe1);
2153 DO_TESTCASE_2x3("sirq-safe-A => hirqs-on", irqsafe2A);
2154 DO_TESTCASE_2x6("safe-A + irqs-on", irqsafe2B);
2155 DO_TESTCASE_6x6("safe-A + unsafe-B #1", irqsafe3);
2156 DO_TESTCASE_6x6("safe-A + unsafe-B #2", irqsafe4);
2157 DO_TESTCASE_6x6RW("irq lock-inversion", irq_inversion);
2158
31e0d747
BF		 2159 DO_TESTCASE_6x2x2RW("irq read-recursion", irq_read_recursion);
2160 DO_TESTCASE_6x2x2RW("irq read-recursion #2", irq_read_recursion2);
cae2ed9a 2161
1de99445
ML		 2162 ww_tests();
2163
e9181886
BF		 2164 force_read_lock_recursive = 0;
2165 /*
2166 * queued_read_lock() specific test cases can be put here
2167 */
2168
cae2ed9a
IM		 2169 if (unexpected_testcase_failures) {
2170 printk("-----------------------------------------------------------------\n");
2171 debug_locks = 0;
2172 printk("BUG: %3d unexpected failures (out of %3d) - debugging disabled! |\n",
2173 unexpected_testcase_failures, testcase_total);
2174 printk("-----------------------------------------------------------------\n");
2175 } else if (expected_testcase_failures && testcase_successes) {
2176 printk("--------------------------------------------------------\n");
2177 printk("%3d out of %3d testcases failed, as expected. |\n",
2178 expected_testcase_failures, testcase_total);
2179 printk("----------------------------------------------------\n");
2180 debug_locks = 1;
2181 } else if (expected_testcase_failures && !testcase_successes) {
2182 printk("--------------------------------------------------------\n");
2183 printk("All %3d testcases failed, as expected. |\n",
2184 expected_testcase_failures);
2185 printk("----------------------------------------\n");
2186 debug_locks = 1;
2187 } else {
2188 printk("-------------------------------------------------------\n");
2189 printk("Good, all %3d testcases passed! |\n",
2190 testcase_successes);
2191 printk("---------------------------------\n");
2192 debug_locks = 1;
2193 }
cdc84d79 2194 lockdep_set_selftest_task(NULL);
cae2ed9a
IM		 2195 debug_locks_silent = 0;
2196}
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