Blame view
kernel/lockdep_proc.c
17 KB
a8f24a397
|
1 2 3 4 5 6 7 |
/* * kernel/lockdep_proc.c * * Runtime locking correctness validator * * Started by Ingo Molnar: * |
4b32d0a4e
|
8 9 |
* Copyright (C) 2006,2007 Red Hat, Inc., Ingo Molnar <mingo@redhat.com> * Copyright (C) 2007 Red Hat, Inc., Peter Zijlstra <pzijlstr@redhat.com> |
a8f24a397
|
10 11 12 13 |
* * Code for /proc/lockdep and /proc/lockdep_stats: * */ |
9984de1a5
|
14 |
#include <linux/export.h> |
a8f24a397
|
15 16 17 18 |
#include <linux/proc_fs.h> #include <linux/seq_file.h> #include <linux/kallsyms.h> #include <linux/debug_locks.h> |
c46261de0
|
19 20 21 22 |
#include <linux/vmalloc.h> #include <linux/sort.h> #include <asm/uaccess.h> #include <asm/div64.h> |
a8f24a397
|
23 24 25 26 27 |
#include "lockdep_internals.h" static void *l_next(struct seq_file *m, void *v, loff_t *pos) { |
8109e1de8
|
28 |
return seq_list_next(v, &all_lock_classes, pos); |
a8f24a397
|
29 30 31 32 |
} static void *l_start(struct seq_file *m, loff_t *pos) { |
8109e1de8
|
33 |
return seq_list_start_head(&all_lock_classes, *pos); |
a8f24a397
|
34 35 36 37 38 |
} static void l_stop(struct seq_file *m, void *v) { } |
068135e63
|
39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 |
static void print_name(struct seq_file *m, struct lock_class *class) { char str[128]; const char *name = class->name; if (!name) { name = __get_key_name(class->key, str); seq_printf(m, "%s", name); } else{ seq_printf(m, "%s", name); if (class->name_version > 1) seq_printf(m, "#%d", class->name_version); if (class->subclass) seq_printf(m, "/%d", class->subclass); } } |
a8f24a397
|
55 56 |
static int l_show(struct seq_file *m, void *v) { |
8109e1de8
|
57 |
struct lock_class *class = list_entry(v, struct lock_class, lock_entry); |
068135e63
|
58 |
struct lock_list *entry; |
f510b233c
|
59 |
char usage[LOCK_USAGE_CHARS]; |
a8f24a397
|
60 |
|
8109e1de8
|
61 |
if (v == &all_lock_classes) { |
94c61c0ae
|
62 63 64 65 |
seq_printf(m, "all lock classes: "); return 0; } |
a8f24a397
|
66 67 68 69 |
seq_printf(m, "%p", class->key); #ifdef CONFIG_DEBUG_LOCKDEP seq_printf(m, " OPS:%8ld", class->ops); #endif |
df60a8441
|
70 71 72 73 |
#ifdef CONFIG_PROVE_LOCKING seq_printf(m, " FD:%5ld", lockdep_count_forward_deps(class)); seq_printf(m, " BD:%5ld", lockdep_count_backward_deps(class)); #endif |
a8f24a397
|
74 |
|
f510b233c
|
75 76 |
get_usage_chars(class, usage); seq_printf(m, " %s", usage); |
a8f24a397
|
77 |
|
068135e63
|
78 79 80 81 82 83 84 |
seq_printf(m, ": "); print_name(m, class); seq_puts(m, " "); list_for_each_entry(entry, &class->locks_after, entry) { if (entry->distance == 1) { |
2429e4ee7
|
85 |
seq_printf(m, " -> [%p] ", entry->class->key); |
068135e63
|
86 87 88 89 |
print_name(m, entry->class); seq_puts(m, " "); } |
a8f24a397
|
90 91 92 93 94 95 |
} seq_puts(m, " "); return 0; } |
15ad7cdcf
|
96 |
static const struct seq_operations lockdep_ops = { |
a8f24a397
|
97 98 99 100 101 102 103 104 |
.start = l_start, .next = l_next, .stop = l_stop, .show = l_show, }; static int lockdep_open(struct inode *inode, struct file *file) { |
8109e1de8
|
105 |
return seq_open(file, &lockdep_ops); |
a8f24a397
|
106 |
} |
15ad7cdcf
|
107 |
static const struct file_operations proc_lockdep_operations = { |
a8f24a397
|
108 109 110 111 112 |
.open = lockdep_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release, }; |
cd1a28e84
|
113 |
#ifdef CONFIG_PROVE_LOCKING |
443cd507c
|
114 115 116 117 |
static void *lc_start(struct seq_file *m, loff_t *pos) { if (*pos == 0) return SEQ_START_TOKEN; |
e9d65725b
|
118 119 |
if (*pos - 1 < nr_lock_chains) return lock_chains + (*pos - 1); |
443cd507c
|
120 121 122 |
return NULL; } |
12aac19d4
|
123 124 125 126 127 |
static void *lc_next(struct seq_file *m, void *v, loff_t *pos) { (*pos)++; return lc_start(m, pos); } |
443cd507c
|
128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 |
static void lc_stop(struct seq_file *m, void *v) { } static int lc_show(struct seq_file *m, void *v) { struct lock_chain *chain = v; struct lock_class *class; int i; if (v == SEQ_START_TOKEN) { seq_printf(m, "all lock chains: "); return 0; } seq_printf(m, "irq_context: %d ", chain->irq_context); for (i = 0; i < chain->depth; i++) { class = lock_chain_get_class(chain, i); |
8bfe0298f
|
149 150 |
if (!class->key) continue; |
443cd507c
|
151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 |
seq_printf(m, "[%p] ", class->key); print_name(m, class); seq_puts(m, " "); } seq_puts(m, " "); return 0; } static const struct seq_operations lockdep_chains_ops = { .start = lc_start, .next = lc_next, .stop = lc_stop, .show = lc_show, }; static int lockdep_chains_open(struct inode *inode, struct file *file) { |
12aac19d4
|
171 |
return seq_open(file, &lockdep_chains_ops); |
443cd507c
|
172 173 174 175 176 177 178 179 |
} static const struct file_operations proc_lockdep_chains_operations = { .open = lockdep_chains_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release, }; |
cd1a28e84
|
180 |
#endif /* CONFIG_PROVE_LOCKING */ |
443cd507c
|
181 |
|
a8f24a397
|
182 183 184 |
static void lockdep_stats_debug_show(struct seq_file *m) { #ifdef CONFIG_DEBUG_LOCKDEP |
bd6d29c25
|
185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 |
unsigned long long hi1 = debug_atomic_read(hardirqs_on_events), hi2 = debug_atomic_read(hardirqs_off_events), hr1 = debug_atomic_read(redundant_hardirqs_on), hr2 = debug_atomic_read(redundant_hardirqs_off), si1 = debug_atomic_read(softirqs_on_events), si2 = debug_atomic_read(softirqs_off_events), sr1 = debug_atomic_read(redundant_softirqs_on), sr2 = debug_atomic_read(redundant_softirqs_off); seq_printf(m, " chain lookup misses: %11llu ", debug_atomic_read(chain_lookup_misses)); seq_printf(m, " chain lookup hits: %11llu ", debug_atomic_read(chain_lookup_hits)); seq_printf(m, " cyclic checks: %11llu ", debug_atomic_read(nr_cyclic_checks)); seq_printf(m, " find-mask forwards checks: %11llu ", debug_atomic_read(nr_find_usage_forwards_checks)); seq_printf(m, " find-mask backwards checks: %11llu ", debug_atomic_read(nr_find_usage_backwards_checks)); seq_printf(m, " hardirq on events: %11llu ", hi1); seq_printf(m, " hardirq off events: %11llu ", hi2); seq_printf(m, " redundant hardirq ons: %11llu ", hr1); seq_printf(m, " redundant hardirq offs: %11llu ", hr2); seq_printf(m, " softirq on events: %11llu ", si1); seq_printf(m, " softirq off events: %11llu ", si2); seq_printf(m, " redundant softirq ons: %11llu ", sr1); seq_printf(m, " redundant softirq offs: %11llu ", sr2); |
a8f24a397
|
226 227 228 229 230 231 232 233 234 235 236 237 238 |
#endif } static int lockdep_stats_show(struct seq_file *m, void *v) { struct lock_class *class; unsigned long nr_unused = 0, nr_uncategorized = 0, nr_irq_safe = 0, nr_irq_unsafe = 0, nr_softirq_safe = 0, nr_softirq_unsafe = 0, nr_hardirq_safe = 0, nr_hardirq_unsafe = 0, nr_irq_read_safe = 0, nr_irq_read_unsafe = 0, nr_softirq_read_safe = 0, nr_softirq_read_unsafe = 0, nr_hardirq_read_safe = 0, nr_hardirq_read_unsafe = 0, |
dec296082
|
239 |
sum_forward_deps = 0; |
a8f24a397
|
240 241 242 243 244 245 246 247 248 |
list_for_each_entry(class, &all_lock_classes, lock_entry) { if (class->usage_mask == 0) nr_unused++; if (class->usage_mask == LOCKF_USED) nr_uncategorized++; if (class->usage_mask & LOCKF_USED_IN_IRQ) nr_irq_safe++; |
4fc95e867
|
249 |
if (class->usage_mask & LOCKF_ENABLED_IRQ) |
a8f24a397
|
250 251 252 |
nr_irq_unsafe++; if (class->usage_mask & LOCKF_USED_IN_SOFTIRQ) nr_softirq_safe++; |
4fc95e867
|
253 |
if (class->usage_mask & LOCKF_ENABLED_SOFTIRQ) |
a8f24a397
|
254 255 256 |
nr_softirq_unsafe++; if (class->usage_mask & LOCKF_USED_IN_HARDIRQ) nr_hardirq_safe++; |
4fc95e867
|
257 |
if (class->usage_mask & LOCKF_ENABLED_HARDIRQ) |
a8f24a397
|
258 259 260 |
nr_hardirq_unsafe++; if (class->usage_mask & LOCKF_USED_IN_IRQ_READ) nr_irq_read_safe++; |
4fc95e867
|
261 |
if (class->usage_mask & LOCKF_ENABLED_IRQ_READ) |
a8f24a397
|
262 263 264 |
nr_irq_read_unsafe++; if (class->usage_mask & LOCKF_USED_IN_SOFTIRQ_READ) nr_softirq_read_safe++; |
4fc95e867
|
265 |
if (class->usage_mask & LOCKF_ENABLED_SOFTIRQ_READ) |
a8f24a397
|
266 267 268 |
nr_softirq_read_unsafe++; if (class->usage_mask & LOCKF_USED_IN_HARDIRQ_READ) nr_hardirq_read_safe++; |
4fc95e867
|
269 |
if (class->usage_mask & LOCKF_ENABLED_HARDIRQ_READ) |
a8f24a397
|
270 |
nr_hardirq_read_unsafe++; |
df60a8441
|
271 |
#ifdef CONFIG_PROVE_LOCKING |
419ca3f13
|
272 |
sum_forward_deps += lockdep_count_forward_deps(class); |
df60a8441
|
273 |
#endif |
a8f24a397
|
274 |
} |
501b9ebf4
|
275 |
#ifdef CONFIG_DEBUG_LOCKDEP |
bd6d29c25
|
276 |
DEBUG_LOCKS_WARN_ON(debug_atomic_read(nr_unused_locks) != nr_unused); |
a8f24a397
|
277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 |
#endif seq_printf(m, " lock-classes: %11lu [max: %lu] ", nr_lock_classes, MAX_LOCKDEP_KEYS); seq_printf(m, " direct dependencies: %11lu [max: %lu] ", nr_list_entries, MAX_LOCKDEP_ENTRIES); seq_printf(m, " indirect dependencies: %11lu ", sum_forward_deps); /* * Total number of dependencies: * * All irq-safe locks may nest inside irq-unsafe locks, * plus all the other known dependencies: */ seq_printf(m, " all direct dependencies: %11lu ", nr_irq_unsafe * nr_irq_safe + nr_hardirq_unsafe * nr_hardirq_safe + nr_list_entries); |
8e18257d2
|
299 |
#ifdef CONFIG_PROVE_LOCKING |
a8f24a397
|
300 301 302 |
seq_printf(m, " dependency chains: %11lu [max: %lu] ", nr_lock_chains, MAX_LOCKDEP_CHAINS); |
443cd507c
|
303 304 |
seq_printf(m, " dependency chain hlocks: %11d [max: %lu] ", |
cd1a28e84
|
305 |
nr_chain_hlocks, MAX_LOCKDEP_CHAIN_HLOCKS); |
8e18257d2
|
306 |
#endif |
a8f24a397
|
307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 |
#ifdef CONFIG_TRACE_IRQFLAGS seq_printf(m, " in-hardirq chains: %11u ", nr_hardirq_chains); seq_printf(m, " in-softirq chains: %11u ", nr_softirq_chains); #endif seq_printf(m, " in-process chains: %11u ", nr_process_chains); seq_printf(m, " stack-trace entries: %11lu [max: %lu] ", nr_stack_trace_entries, MAX_STACK_TRACE_ENTRIES); seq_printf(m, " combined max dependencies: %11u ", (nr_hardirq_chains + 1) * (nr_softirq_chains + 1) * (nr_process_chains + 1) ); seq_printf(m, " hardirq-safe locks: %11lu ", nr_hardirq_safe); seq_printf(m, " hardirq-unsafe locks: %11lu ", nr_hardirq_unsafe); seq_printf(m, " softirq-safe locks: %11lu ", nr_softirq_safe); seq_printf(m, " softirq-unsafe locks: %11lu ", nr_softirq_unsafe); seq_printf(m, " irq-safe locks: %11lu ", nr_irq_safe); seq_printf(m, " irq-unsafe locks: %11lu ", nr_irq_unsafe); seq_printf(m, " hardirq-read-safe locks: %11lu ", nr_hardirq_read_safe); seq_printf(m, " hardirq-read-unsafe locks: %11lu ", nr_hardirq_read_unsafe); seq_printf(m, " softirq-read-safe locks: %11lu ", nr_softirq_read_safe); seq_printf(m, " softirq-read-unsafe locks: %11lu ", nr_softirq_read_unsafe); seq_printf(m, " irq-read-safe locks: %11lu ", nr_irq_read_safe); seq_printf(m, " irq-read-unsafe locks: %11lu ", nr_irq_read_unsafe); seq_printf(m, " uncategorized locks: %11lu ", nr_uncategorized); seq_printf(m, " unused locks: %11lu ", nr_unused); seq_printf(m, " max locking depth: %11u ", max_lockdep_depth); |
bbfa26229
|
375 |
#ifdef CONFIG_PROVE_LOCKING |
12f3dfd02
|
376 377 378 |
seq_printf(m, " max bfs queue depth: %11u ", max_bfs_queue_depth); |
bbfa26229
|
379 |
#endif |
a8f24a397
|
380 381 382 383 384 385 386 387 388 389 390 391 |
lockdep_stats_debug_show(m); seq_printf(m, " debug_locks: %11u ", debug_locks); return 0; } static int lockdep_stats_open(struct inode *inode, struct file *file) { return single_open(file, lockdep_stats_show, NULL); } |
15ad7cdcf
|
392 |
static const struct file_operations proc_lockdep_stats_operations = { |
a8f24a397
|
393 394 395 |
.open = lockdep_stats_open, .read = seq_read, .llseek = seq_lseek, |
c0f335862
|
396 |
.release = single_release, |
a8f24a397
|
397 |
}; |
c46261de0
|
398 399 400 401 402 403 404 405 |
#ifdef CONFIG_LOCK_STAT struct lock_stat_data { struct lock_class *class; struct lock_class_stats stats; }; struct lock_stat_seq { |
c46261de0
|
406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 |
struct lock_stat_data *iter_end; struct lock_stat_data stats[MAX_LOCKDEP_KEYS]; }; /* * sort on absolute number of contentions */ static int lock_stat_cmp(const void *l, const void *r) { const struct lock_stat_data *dl = l, *dr = r; unsigned long nl, nr; nl = dl->stats.read_waittime.nr + dl->stats.write_waittime.nr; nr = dr->stats.read_waittime.nr + dr->stats.write_waittime.nr; return nr - nl; } static void seq_line(struct seq_file *m, char c, int offset, int length) { int i; for (i = 0; i < offset; i++) seq_puts(m, " "); for (i = 0; i < length; i++) seq_printf(m, "%c", c); seq_puts(m, " "); } static void snprint_time(char *buf, size_t bufsiz, s64 nr) { |
6918bc5c8
|
438 439 |
s64 div; s32 rem; |
c46261de0
|
440 |
|
2189459d2
|
441 |
nr += 5; /* for display rounding */ |
6918bc5c8
|
442 443 |
div = div_s64_rem(nr, 1000, &rem); snprintf(buf, bufsiz, "%lld.%02d", (long long)div, (int)rem/10); |
c46261de0
|
444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 |
} static void seq_time(struct seq_file *m, s64 time) { char num[15]; snprint_time(num, sizeof(num), time); seq_printf(m, " %14s", num); } static void seq_lock_time(struct seq_file *m, struct lock_time *lt) { seq_printf(m, "%14lu", lt->nr); seq_time(m, lt->min); seq_time(m, lt->max); seq_time(m, lt->total); } static void seq_stats(struct seq_file *m, struct lock_stat_data *data) { char name[39]; struct lock_class *class; struct lock_class_stats *stats; int i, namelen; class = data->class; stats = &data->stats; |
d38e1d5aa
|
471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 |
namelen = 38; if (class->name_version > 1) namelen -= 2; /* XXX truncates versions > 9 */ if (class->subclass) namelen -= 2; if (!class->name) { char str[KSYM_NAME_LEN]; const char *key_name; key_name = __get_key_name(class->key, str); snprintf(name, namelen, "%s", key_name); } else { snprintf(name, namelen, "%s", class->name); } |
c46261de0
|
486 |
namelen = strlen(name); |
d38e1d5aa
|
487 488 489 490 491 492 493 494 |
if (class->name_version > 1) { snprintf(name+namelen, 3, "#%d", class->name_version); namelen += 2; } if (class->subclass) { snprintf(name+namelen, 3, "/%d", class->subclass); namelen += 2; } |
c46261de0
|
495 496 497 498 499 500 |
if (stats->write_holdtime.nr) { if (stats->read_holdtime.nr) seq_printf(m, "%38s-W:", name); else seq_printf(m, "%40s:", name); |
96645678c
|
501 |
seq_printf(m, "%14lu ", stats->bounces[bounce_contended_write]); |
c46261de0
|
502 |
seq_lock_time(m, &stats->write_waittime); |
96645678c
|
503 |
seq_printf(m, " %14lu ", stats->bounces[bounce_acquired_write]); |
c46261de0
|
504 505 506 507 508 509 510 |
seq_lock_time(m, &stats->write_holdtime); seq_puts(m, " "); } if (stats->read_holdtime.nr) { seq_printf(m, "%38s-R:", name); |
96645678c
|
511 |
seq_printf(m, "%14lu ", stats->bounces[bounce_contended_read]); |
c46261de0
|
512 |
seq_lock_time(m, &stats->read_waittime); |
96645678c
|
513 |
seq_printf(m, " %14lu ", stats->bounces[bounce_acquired_read]); |
c46261de0
|
514 515 516 517 518 519 520 521 522 523 |
seq_lock_time(m, &stats->read_holdtime); seq_puts(m, " "); } if (stats->read_waittime.nr + stats->write_waittime.nr == 0) return; if (stats->read_holdtime.nr) namelen += 2; |
c7e78cff6
|
524 |
for (i = 0; i < LOCKSTAT_POINTS; i++) { |
c46261de0
|
525 526 527 528 529 530 531 |
char ip[32]; if (class->contention_point[i] == 0) break; if (!i) seq_line(m, '-', 40-namelen, namelen); |
c46261de0
|
532 533 |
snprintf(ip, sizeof(ip), "[<%p>]", (void *)class->contention_point[i]); |
3cf9b85b4
|
534 535 536 537 |
seq_printf(m, "%40s %14lu %29s %pS ", name, stats->contention_point[i], ip, (void *)class->contention_point[i]); |
c46261de0
|
538 |
} |
c7e78cff6
|
539 |
for (i = 0; i < LOCKSTAT_POINTS; i++) { |
c7e78cff6
|
540 541 542 543 544 545 546 |
char ip[32]; if (class->contending_point[i] == 0) break; if (!i) seq_line(m, '-', 40-namelen, namelen); |
c7e78cff6
|
547 548 |
snprintf(ip, sizeof(ip), "[<%p>]", (void *)class->contending_point[i]); |
3cf9b85b4
|
549 550 551 552 |
seq_printf(m, "%40s %14lu %29s %pS ", name, stats->contending_point[i], ip, (void *)class->contending_point[i]); |
c7e78cff6
|
553 |
} |
c46261de0
|
554 555 556 |
if (i) { seq_puts(m, " "); |
96645678c
|
557 |
seq_line(m, '.', 0, 40 + 1 + 10 * (14 + 1)); |
c46261de0
|
558 559 560 561 562 563 564 |
seq_puts(m, " "); } } static void seq_header(struct seq_file *m) { |
c7e78cff6
|
565 566 |
seq_printf(m, "lock_stat version 0.3 "); |
9833f8cb9
|
567 568 569 570 |
if (unlikely(!debug_locks)) seq_printf(m, "*WARNING* lock debugging disabled!! - possibly due to a lockdep warning "); |
96645678c
|
571 572 573 574 |
seq_line(m, '-', 0, 40 + 1 + 10 * (14 + 1)); seq_printf(m, "%40s %14s %14s %14s %14s %14s %14s %14s %14s " "%14s %14s ", |
c46261de0
|
575 |
"class name", |
96645678c
|
576 |
"con-bounces", |
c46261de0
|
577 578 579 580 |
"contentions", "waittime-min", "waittime-max", "waittime-total", |
96645678c
|
581 |
"acq-bounces", |
c46261de0
|
582 583 584 585 |
"acquisitions", "holdtime-min", "holdtime-max", "holdtime-total"); |
96645678c
|
586 |
seq_line(m, '-', 0, 40 + 1 + 10 * (14 + 1)); |
c46261de0
|
587 588 589 590 591 592 593 |
seq_printf(m, " "); } static void *ls_start(struct seq_file *m, loff_t *pos) { struct lock_stat_seq *data = m->private; |
96004bb2a
|
594 |
struct lock_stat_data *iter; |
c46261de0
|
595 |
|
94c61c0ae
|
596 597 |
if (*pos == 0) return SEQ_START_TOKEN; |
c46261de0
|
598 |
|
96004bb2a
|
599 600 601 |
iter = data->stats + (*pos - 1); if (iter >= data->iter_end) iter = NULL; |
4b32d0a4e
|
602 |
|
96004bb2a
|
603 |
return iter; |
c46261de0
|
604 605 606 607 |
} static void *ls_next(struct seq_file *m, void *v, loff_t *pos) { |
c46261de0
|
608 |
(*pos)++; |
96004bb2a
|
609 |
return ls_start(m, pos); |
c46261de0
|
610 611 612 613 614 615 616 617 |
} static void ls_stop(struct seq_file *m, void *v) { } static int ls_show(struct seq_file *m, void *v) { |
94c61c0ae
|
618 619 620 621 |
if (v == SEQ_START_TOKEN) seq_header(m); else seq_stats(m, v); |
c46261de0
|
622 |
|
c46261de0
|
623 624 |
return 0; } |
88e9d34c7
|
625 |
static const struct seq_operations lockstat_ops = { |
c46261de0
|
626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 |
.start = ls_start, .next = ls_next, .stop = ls_stop, .show = ls_show, }; static int lock_stat_open(struct inode *inode, struct file *file) { int res; struct lock_class *class; struct lock_stat_seq *data = vmalloc(sizeof(struct lock_stat_seq)); if (!data) return -ENOMEM; res = seq_open(file, &lockstat_ops); if (!res) { struct lock_stat_data *iter = data->stats; struct seq_file *m = file->private_data; |
c46261de0
|
645 646 647 648 649 650 |
list_for_each_entry(class, &all_lock_classes, lock_entry) { iter->class = class; iter->stats = lock_stats(class); iter++; } data->iter_end = iter; |
96004bb2a
|
651 |
sort(data->stats, data->iter_end - data->stats, |
c46261de0
|
652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 |
sizeof(struct lock_stat_data), lock_stat_cmp, NULL); m->private = data; } else vfree(data); return res; } static ssize_t lock_stat_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) { struct lock_class *class; char c; if (count) { if (get_user(c, buf)) return -EFAULT; if (c != '0') return count; list_for_each_entry(class, &all_lock_classes, lock_entry) clear_lock_stats(class); } return count; } static int lock_stat_release(struct inode *inode, struct file *file) { struct seq_file *seq = file->private_data; vfree(seq->private); |
c46261de0
|
686 687 688 689 690 691 692 693 694 695 696 |
return seq_release(inode, file); } static const struct file_operations proc_lock_stat_operations = { .open = lock_stat_open, .write = lock_stat_write, .read = seq_read, .llseek = seq_lseek, .release = lock_stat_release, }; #endif /* CONFIG_LOCK_STAT */ |
a8f24a397
|
697 698 |
static int __init lockdep_proc_init(void) { |
c33fff0af
|
699 |
proc_create("lockdep", S_IRUSR, NULL, &proc_lockdep_operations); |
cd1a28e84
|
700 |
#ifdef CONFIG_PROVE_LOCKING |
443cd507c
|
701 702 |
proc_create("lockdep_chains", S_IRUSR, NULL, &proc_lockdep_chains_operations); |
cd1a28e84
|
703 |
#endif |
c33fff0af
|
704 705 |
proc_create("lockdep_stats", S_IRUSR, NULL, &proc_lockdep_stats_operations); |
a8f24a397
|
706 |
|
c46261de0
|
707 |
#ifdef CONFIG_LOCK_STAT |
9795447f7
|
708 709 |
proc_create("lock_stat", S_IRUSR | S_IWUSR, NULL, &proc_lock_stat_operations); |
c46261de0
|
710 |
#endif |
a8f24a397
|
711 712 713 714 |
return 0; } __initcall(lockdep_proc_init); |