1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef __KERNEL_PRINTK__ |
3 | #define __KERNEL_PRINTK__ |
4 | |
5 | #include <linux/stdarg.h> |
6 | #include <linux/init.h> |
7 | #include <linux/kern_levels.h> |
8 | #include <linux/linkage.h> |
9 | #include <linux/ratelimit_types.h> |
10 | #include <linux/once_lite.h> |
11 | |
12 | extern const char linux_banner[]; |
13 | extern const char linux_proc_banner[]; |
14 | |
15 | extern int oops_in_progress; /* If set, an oops, panic(), BUG() or die() is in progress */ |
16 | |
17 | #define 2 |
18 | |
19 | static inline int printk_get_level(const char *buffer) |
20 | { |
21 | if (buffer[0] == KERN_SOH_ASCII && buffer[1]) { |
22 | switch (buffer[1]) { |
23 | case '0' ... '7': |
24 | case 'c': /* KERN_CONT */ |
25 | return buffer[1]; |
26 | } |
27 | } |
28 | return 0; |
29 | } |
30 | |
31 | static inline const char *printk_skip_level(const char *buffer) |
32 | { |
33 | if (printk_get_level(buffer)) |
34 | return buffer + 2; |
35 | |
36 | return buffer; |
37 | } |
38 | |
39 | static inline const char *(const char *buffer) |
40 | { |
41 | while (printk_get_level(buffer)) |
42 | buffer = printk_skip_level(buffer); |
43 | |
44 | return buffer; |
45 | } |
46 | |
47 | #define CONSOLE_EXT_LOG_MAX 8192 |
48 | |
49 | /* printk's without a loglevel use this.. */ |
50 | #define MESSAGE_LOGLEVEL_DEFAULT CONFIG_MESSAGE_LOGLEVEL_DEFAULT |
51 | |
52 | /* We show everything that is MORE important than this.. */ |
53 | #define CONSOLE_LOGLEVEL_SILENT 0 /* Mum's the word */ |
54 | #define CONSOLE_LOGLEVEL_MIN 1 /* Minimum loglevel we let people use */ |
55 | #define CONSOLE_LOGLEVEL_DEBUG 10 /* issue debug messages */ |
56 | #define CONSOLE_LOGLEVEL_MOTORMOUTH 15 /* You can't shut this one up */ |
57 | |
58 | /* |
59 | * Default used to be hard-coded at 7, quiet used to be hardcoded at 4, |
60 | * we're now allowing both to be set from kernel config. |
61 | */ |
62 | #define CONSOLE_LOGLEVEL_DEFAULT CONFIG_CONSOLE_LOGLEVEL_DEFAULT |
63 | #define CONSOLE_LOGLEVEL_QUIET CONFIG_CONSOLE_LOGLEVEL_QUIET |
64 | |
65 | extern int console_printk[]; |
66 | |
67 | #define console_loglevel (console_printk[0]) |
68 | #define default_message_loglevel (console_printk[1]) |
69 | #define minimum_console_loglevel (console_printk[2]) |
70 | #define default_console_loglevel (console_printk[3]) |
71 | |
72 | extern void console_verbose(void); |
73 | |
74 | /* strlen("ratelimit") + 1 */ |
75 | #define DEVKMSG_STR_MAX_SIZE 10 |
76 | extern char devkmsg_log_str[]; |
77 | struct ctl_table; |
78 | |
79 | extern int suppress_printk; |
80 | |
81 | struct va_format { |
82 | const char *fmt; |
83 | va_list *va; |
84 | }; |
85 | |
86 | /* |
87 | * FW_BUG |
88 | * Add this to a message where you are sure the firmware is buggy or behaves |
89 | * really stupid or out of spec. Be aware that the responsible BIOS developer |
90 | * should be able to fix this issue or at least get a concrete idea of the |
91 | * problem by reading your message without the need of looking at the kernel |
92 | * code. |
93 | * |
94 | * Use it for definite and high priority BIOS bugs. |
95 | * |
96 | * FW_WARN |
97 | * Use it for not that clear (e.g. could the kernel messed up things already?) |
98 | * and medium priority BIOS bugs. |
99 | * |
100 | * FW_INFO |
101 | * Use this one if you want to tell the user or vendor about something |
102 | * suspicious, but generally harmless related to the firmware. |
103 | * |
104 | * Use it for information or very low priority BIOS bugs. |
105 | */ |
106 | #define FW_BUG "[Firmware Bug]: " |
107 | #define FW_WARN "[Firmware Warn]: " |
108 | #define FW_INFO "[Firmware Info]: " |
109 | |
110 | /* |
111 | * HW_ERR |
112 | * Add this to a message for hardware errors, so that user can report |
113 | * it to hardware vendor instead of LKML or software vendor. |
114 | */ |
115 | #define HW_ERR "[Hardware Error]: " |
116 | |
117 | /* |
118 | * DEPRECATED |
119 | * Add this to a message whenever you want to warn user space about the use |
120 | * of a deprecated aspect of an API so they can stop using it |
121 | */ |
122 | #define DEPRECATED "[Deprecated]: " |
123 | |
124 | /* |
125 | * Dummy printk for disabled debugging statements to use whilst maintaining |
126 | * gcc's format checking. |
127 | */ |
128 | #define no_printk(fmt, ...) \ |
129 | ({ \ |
130 | if (0) \ |
131 | printk(fmt, ##__VA_ARGS__); \ |
132 | 0; \ |
133 | }) |
134 | |
135 | #ifdef CONFIG_EARLY_PRINTK |
136 | extern asmlinkage __printf(1, 2) |
137 | void early_printk(const char *fmt, ...); |
138 | #else |
139 | static inline __printf(1, 2) __cold |
140 | void early_printk(const char *s, ...) { } |
141 | #endif |
142 | |
143 | struct dev_printk_info; |
144 | |
145 | #ifdef CONFIG_PRINTK |
146 | asmlinkage __printf(4, 0) |
147 | int vprintk_emit(int facility, int level, |
148 | const struct dev_printk_info *dev_info, |
149 | const char *fmt, va_list args); |
150 | |
151 | asmlinkage __printf(1, 0) |
152 | int vprintk(const char *fmt, va_list args); |
153 | |
154 | asmlinkage __printf(1, 2) __cold |
155 | int _printk(const char *fmt, ...); |
156 | |
157 | /* |
158 | * Special printk facility for scheduler/timekeeping use only, _DO_NOT_USE_ ! |
159 | */ |
160 | __printf(1, 2) __cold int _printk_deferred(const char *fmt, ...); |
161 | |
162 | extern void __printk_safe_enter(void); |
163 | extern void __printk_safe_exit(void); |
164 | /* |
165 | * The printk_deferred_enter/exit macros are available only as a hack for |
166 | * some code paths that need to defer all printk console printing. Interrupts |
167 | * must be disabled for the deferred duration. |
168 | */ |
169 | #define printk_deferred_enter __printk_safe_enter |
170 | #define printk_deferred_exit __printk_safe_exit |
171 | |
172 | extern bool pr_flush(int timeout_ms, bool reset_on_progress); |
173 | |
174 | /* |
175 | * Please don't use printk_ratelimit(), because it shares ratelimiting state |
176 | * with all other unrelated printk_ratelimit() callsites. Instead use |
177 | * printk_ratelimited() or plain old __ratelimit(). |
178 | */ |
179 | extern int __printk_ratelimit(const char *func); |
180 | #define printk_ratelimit() __printk_ratelimit(__func__) |
181 | extern bool printk_timed_ratelimit(unsigned long *caller_jiffies, |
182 | unsigned int interval_msec); |
183 | |
184 | extern int printk_delay_msec; |
185 | extern int dmesg_restrict; |
186 | |
187 | extern void wake_up_klogd(void); |
188 | |
189 | char *log_buf_addr_get(void); |
190 | u32 log_buf_len_get(void); |
191 | void log_buf_vmcoreinfo_setup(void); |
192 | void __init setup_log_buf(int early); |
193 | __printf(1, 2) void dump_stack_set_arch_desc(const char *fmt, ...); |
194 | void dump_stack_print_info(const char *log_lvl); |
195 | void show_regs_print_info(const char *log_lvl); |
196 | extern asmlinkage void dump_stack_lvl(const char *log_lvl) __cold; |
197 | extern asmlinkage void dump_stack(void) __cold; |
198 | void printk_trigger_flush(void); |
199 | #else |
200 | static inline __printf(1, 0) |
201 | int vprintk(const char *s, va_list args) |
202 | { |
203 | return 0; |
204 | } |
205 | static inline __printf(1, 2) __cold |
206 | int _printk(const char *s, ...) |
207 | { |
208 | return 0; |
209 | } |
210 | static inline __printf(1, 2) __cold |
211 | int _printk_deferred(const char *s, ...) |
212 | { |
213 | return 0; |
214 | } |
215 | |
216 | static inline void printk_deferred_enter(void) |
217 | { |
218 | } |
219 | |
220 | static inline void printk_deferred_exit(void) |
221 | { |
222 | } |
223 | |
224 | static inline bool pr_flush(int timeout_ms, bool reset_on_progress) |
225 | { |
226 | return true; |
227 | } |
228 | |
229 | static inline int printk_ratelimit(void) |
230 | { |
231 | return 0; |
232 | } |
233 | static inline bool printk_timed_ratelimit(unsigned long *caller_jiffies, |
234 | unsigned int interval_msec) |
235 | { |
236 | return false; |
237 | } |
238 | |
239 | static inline void wake_up_klogd(void) |
240 | { |
241 | } |
242 | |
243 | static inline char *log_buf_addr_get(void) |
244 | { |
245 | return NULL; |
246 | } |
247 | |
248 | static inline u32 log_buf_len_get(void) |
249 | { |
250 | return 0; |
251 | } |
252 | |
253 | static inline void log_buf_vmcoreinfo_setup(void) |
254 | { |
255 | } |
256 | |
257 | static inline void setup_log_buf(int early) |
258 | { |
259 | } |
260 | |
261 | static inline __printf(1, 2) void dump_stack_set_arch_desc(const char *fmt, ...) |
262 | { |
263 | } |
264 | |
265 | static inline void dump_stack_print_info(const char *log_lvl) |
266 | { |
267 | } |
268 | |
269 | static inline void show_regs_print_info(const char *log_lvl) |
270 | { |
271 | } |
272 | |
273 | static inline void dump_stack_lvl(const char *log_lvl) |
274 | { |
275 | } |
276 | |
277 | static inline void dump_stack(void) |
278 | { |
279 | } |
280 | static inline void printk_trigger_flush(void) |
281 | { |
282 | } |
283 | #endif |
284 | |
285 | #ifdef CONFIG_SMP |
286 | extern int __printk_cpu_sync_try_get(void); |
287 | extern void __printk_cpu_sync_wait(void); |
288 | extern void __printk_cpu_sync_put(void); |
289 | |
290 | #else |
291 | |
292 | #define __printk_cpu_sync_try_get() true |
293 | #define __printk_cpu_sync_wait() |
294 | #define __printk_cpu_sync_put() |
295 | #endif /* CONFIG_SMP */ |
296 | |
297 | /** |
298 | * printk_cpu_sync_get_irqsave() - Disable interrupts and acquire the printk |
299 | * cpu-reentrant spinning lock. |
300 | * @flags: Stack-allocated storage for saving local interrupt state, |
301 | * to be passed to printk_cpu_sync_put_irqrestore(). |
302 | * |
303 | * If the lock is owned by another CPU, spin until it becomes available. |
304 | * Interrupts are restored while spinning. |
305 | * |
306 | * CAUTION: This function must be used carefully. It does not behave like a |
307 | * typical lock. Here are important things to watch out for... |
308 | * |
309 | * * This function is reentrant on the same CPU. Therefore the calling |
310 | * code must not assume exclusive access to data if code accessing the |
311 | * data can run reentrant or within NMI context on the same CPU. |
312 | * |
313 | * * If there exists usage of this function from NMI context, it becomes |
314 | * unsafe to perform any type of locking or spinning to wait for other |
315 | * CPUs after calling this function from any context. This includes |
316 | * using spinlocks or any other busy-waiting synchronization methods. |
317 | */ |
318 | #define printk_cpu_sync_get_irqsave(flags) \ |
319 | for (;;) { \ |
320 | local_irq_save(flags); \ |
321 | if (__printk_cpu_sync_try_get()) \ |
322 | break; \ |
323 | local_irq_restore(flags); \ |
324 | __printk_cpu_sync_wait(); \ |
325 | } |
326 | |
327 | /** |
328 | * printk_cpu_sync_put_irqrestore() - Release the printk cpu-reentrant spinning |
329 | * lock and restore interrupts. |
330 | * @flags: Caller's saved interrupt state, from printk_cpu_sync_get_irqsave(). |
331 | */ |
332 | #define printk_cpu_sync_put_irqrestore(flags) \ |
333 | do { \ |
334 | __printk_cpu_sync_put(); \ |
335 | local_irq_restore(flags); \ |
336 | } while (0) |
337 | |
338 | extern int kptr_restrict; |
339 | |
340 | /** |
341 | * pr_fmt - used by the pr_*() macros to generate the printk format string |
342 | * @fmt: format string passed from a pr_*() macro |
343 | * |
344 | * This macro can be used to generate a unified format string for pr_*() |
345 | * macros. A common use is to prefix all pr_*() messages in a file with a common |
346 | * string. For example, defining this at the top of a source file: |
347 | * |
348 | * #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
349 | * |
350 | * would prefix all pr_info, pr_emerg... messages in the file with the module |
351 | * name. |
352 | */ |
353 | #ifndef pr_fmt |
354 | #define pr_fmt(fmt) fmt |
355 | #endif |
356 | |
357 | struct module; |
358 | |
359 | #ifdef CONFIG_PRINTK_INDEX |
360 | struct pi_entry { |
361 | const char *fmt; |
362 | const char *func; |
363 | const char *file; |
364 | unsigned int line; |
365 | |
366 | /* |
367 | * While printk and pr_* have the level stored in the string at compile |
368 | * time, some subsystems dynamically add it at runtime through the |
369 | * format string. For these dynamic cases, we allow the subsystem to |
370 | * tell us the level at compile time. |
371 | * |
372 | * NULL indicates that the level, if any, is stored in fmt. |
373 | */ |
374 | const char *level; |
375 | |
376 | /* |
377 | * The format string used by various subsystem specific printk() |
378 | * wrappers to prefix the message. |
379 | * |
380 | * Note that the static prefix defined by the pr_fmt() macro is stored |
381 | * directly in the message format (@fmt), not here. |
382 | */ |
383 | const char *subsys_fmt_prefix; |
384 | } __packed; |
385 | |
386 | #define __printk_index_emit(_fmt, _level, _subsys_fmt_prefix) \ |
387 | do { \ |
388 | if (__builtin_constant_p(_fmt) && __builtin_constant_p(_level)) { \ |
389 | /* |
390 | * We check __builtin_constant_p multiple times here |
391 | * for the same input because GCC will produce an error |
392 | * if we try to assign a static variable to fmt if it |
393 | * is not a constant, even with the outer if statement. |
394 | */ \ |
395 | static const struct pi_entry _entry \ |
396 | __used = { \ |
397 | .fmt = __builtin_constant_p(_fmt) ? (_fmt) : NULL, \ |
398 | .func = __func__, \ |
399 | .file = __FILE__, \ |
400 | .line = __LINE__, \ |
401 | .level = __builtin_constant_p(_level) ? (_level) : NULL, \ |
402 | .subsys_fmt_prefix = _subsys_fmt_prefix,\ |
403 | }; \ |
404 | static const struct pi_entry *_entry_ptr \ |
405 | __used __section(".printk_index") = &_entry; \ |
406 | } \ |
407 | } while (0) |
408 | |
409 | #else /* !CONFIG_PRINTK_INDEX */ |
410 | #define __printk_index_emit(...) do {} while (0) |
411 | #endif /* CONFIG_PRINTK_INDEX */ |
412 | |
413 | /* |
414 | * Some subsystems have their own custom printk that applies a va_format to a |
415 | * generic format, for example, to include a device number or other metadata |
416 | * alongside the format supplied by the caller. |
417 | * |
418 | * In order to store these in the way they would be emitted by the printk |
419 | * infrastructure, the subsystem provides us with the start, fixed string, and |
420 | * any subsequent text in the format string. |
421 | * |
422 | * We take a variable argument list as pr_fmt/dev_fmt/etc are sometimes passed |
423 | * as multiple arguments (eg: `"%s: ", "blah"`), and we must only take the |
424 | * first one. |
425 | * |
426 | * subsys_fmt_prefix must be known at compile time, or compilation will fail |
427 | * (since this is a mistake). If fmt or level is not known at compile time, no |
428 | * index entry will be made (since this can legitimately happen). |
429 | */ |
430 | #define printk_index_subsys_emit(subsys_fmt_prefix, level, fmt, ...) \ |
431 | __printk_index_emit(fmt, level, subsys_fmt_prefix) |
432 | |
433 | #define printk_index_wrap(_p_func, _fmt, ...) \ |
434 | ({ \ |
435 | __printk_index_emit(_fmt, NULL, NULL); \ |
436 | _p_func(_fmt, ##__VA_ARGS__); \ |
437 | }) |
438 | |
439 | |
440 | /** |
441 | * printk - print a kernel message |
442 | * @fmt: format string |
443 | * |
444 | * This is printk(). It can be called from any context. We want it to work. |
445 | * |
446 | * If printk indexing is enabled, _printk() is called from printk_index_wrap. |
447 | * Otherwise, printk is simply #defined to _printk. |
448 | * |
449 | * We try to grab the console_lock. If we succeed, it's easy - we log the |
450 | * output and call the console drivers. If we fail to get the semaphore, we |
451 | * place the output into the log buffer and return. The current holder of |
452 | * the console_sem will notice the new output in console_unlock(); and will |
453 | * send it to the consoles before releasing the lock. |
454 | * |
455 | * One effect of this deferred printing is that code which calls printk() and |
456 | * then changes console_loglevel may break. This is because console_loglevel |
457 | * is inspected when the actual printing occurs. |
458 | * |
459 | * See also: |
460 | * printf(3) |
461 | * |
462 | * See the vsnprintf() documentation for format string extensions over C99. |
463 | */ |
464 | #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__) |
465 | #define printk_deferred(fmt, ...) \ |
466 | printk_index_wrap(_printk_deferred, fmt, ##__VA_ARGS__) |
467 | |
468 | /** |
469 | * pr_emerg - Print an emergency-level message |
470 | * @fmt: format string |
471 | * @...: arguments for the format string |
472 | * |
473 | * This macro expands to a printk with KERN_EMERG loglevel. It uses pr_fmt() to |
474 | * generate the format string. |
475 | */ |
476 | #define pr_emerg(fmt, ...) \ |
477 | printk(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__) |
478 | /** |
479 | * pr_alert - Print an alert-level message |
480 | * @fmt: format string |
481 | * @...: arguments for the format string |
482 | * |
483 | * This macro expands to a printk with KERN_ALERT loglevel. It uses pr_fmt() to |
484 | * generate the format string. |
485 | */ |
486 | #define pr_alert(fmt, ...) \ |
487 | printk(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__) |
488 | /** |
489 | * pr_crit - Print a critical-level message |
490 | * @fmt: format string |
491 | * @...: arguments for the format string |
492 | * |
493 | * This macro expands to a printk with KERN_CRIT loglevel. It uses pr_fmt() to |
494 | * generate the format string. |
495 | */ |
496 | #define pr_crit(fmt, ...) \ |
497 | printk(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__) |
498 | /** |
499 | * pr_err - Print an error-level message |
500 | * @fmt: format string |
501 | * @...: arguments for the format string |
502 | * |
503 | * This macro expands to a printk with KERN_ERR loglevel. It uses pr_fmt() to |
504 | * generate the format string. |
505 | */ |
506 | #define pr_err(fmt, ...) \ |
507 | printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__) |
508 | /** |
509 | * pr_warn - Print a warning-level message |
510 | * @fmt: format string |
511 | * @...: arguments for the format string |
512 | * |
513 | * This macro expands to a printk with KERN_WARNING loglevel. It uses pr_fmt() |
514 | * to generate the format string. |
515 | */ |
516 | #define pr_warn(fmt, ...) \ |
517 | printk(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__) |
518 | /** |
519 | * pr_notice - Print a notice-level message |
520 | * @fmt: format string |
521 | * @...: arguments for the format string |
522 | * |
523 | * This macro expands to a printk with KERN_NOTICE loglevel. It uses pr_fmt() to |
524 | * generate the format string. |
525 | */ |
526 | #define pr_notice(fmt, ...) \ |
527 | printk(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__) |
528 | /** |
529 | * pr_info - Print an info-level message |
530 | * @fmt: format string |
531 | * @...: arguments for the format string |
532 | * |
533 | * This macro expands to a printk with KERN_INFO loglevel. It uses pr_fmt() to |
534 | * generate the format string. |
535 | */ |
536 | #define pr_info(fmt, ...) \ |
537 | printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__) |
538 | |
539 | /** |
540 | * pr_cont - Continues a previous log message in the same line. |
541 | * @fmt: format string |
542 | * @...: arguments for the format string |
543 | * |
544 | * This macro expands to a printk with KERN_CONT loglevel. It should only be |
545 | * used when continuing a log message with no newline ('\n') enclosed. Otherwise |
546 | * it defaults back to KERN_DEFAULT loglevel. |
547 | */ |
548 | #define pr_cont(fmt, ...) \ |
549 | printk(KERN_CONT fmt, ##__VA_ARGS__) |
550 | |
551 | /** |
552 | * pr_devel - Print a debug-level message conditionally |
553 | * @fmt: format string |
554 | * @...: arguments for the format string |
555 | * |
556 | * This macro expands to a printk with KERN_DEBUG loglevel if DEBUG is |
557 | * defined. Otherwise it does nothing. |
558 | * |
559 | * It uses pr_fmt() to generate the format string. |
560 | */ |
561 | #ifdef DEBUG |
562 | #define pr_devel(fmt, ...) \ |
563 | printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) |
564 | #else |
565 | #define pr_devel(fmt, ...) \ |
566 | no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) |
567 | #endif |
568 | |
569 | |
570 | /* If you are writing a driver, please use dev_dbg instead */ |
571 | #if defined(CONFIG_DYNAMIC_DEBUG) || \ |
572 | (defined(CONFIG_DYNAMIC_DEBUG_CORE) && defined(DYNAMIC_DEBUG_MODULE)) |
573 | #include <linux/dynamic_debug.h> |
574 | |
575 | /** |
576 | * pr_debug - Print a debug-level message conditionally |
577 | * @fmt: format string |
578 | * @...: arguments for the format string |
579 | * |
580 | * This macro expands to dynamic_pr_debug() if CONFIG_DYNAMIC_DEBUG is |
581 | * set. Otherwise, if DEBUG is defined, it's equivalent to a printk with |
582 | * KERN_DEBUG loglevel. If DEBUG is not defined it does nothing. |
583 | * |
584 | * It uses pr_fmt() to generate the format string (dynamic_pr_debug() uses |
585 | * pr_fmt() internally). |
586 | */ |
587 | #define pr_debug(fmt, ...) \ |
588 | dynamic_pr_debug(fmt, ##__VA_ARGS__) |
589 | #elif defined(DEBUG) |
590 | #define pr_debug(fmt, ...) \ |
591 | printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) |
592 | #else |
593 | #define pr_debug(fmt, ...) \ |
594 | no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) |
595 | #endif |
596 | |
597 | /* |
598 | * Print a one-time message (analogous to WARN_ONCE() et al): |
599 | */ |
600 | |
601 | #ifdef CONFIG_PRINTK |
602 | #define printk_once(fmt, ...) \ |
603 | DO_ONCE_LITE(printk, fmt, ##__VA_ARGS__) |
604 | #define printk_deferred_once(fmt, ...) \ |
605 | DO_ONCE_LITE(printk_deferred, fmt, ##__VA_ARGS__) |
606 | #else |
607 | #define printk_once(fmt, ...) \ |
608 | no_printk(fmt, ##__VA_ARGS__) |
609 | #define printk_deferred_once(fmt, ...) \ |
610 | no_printk(fmt, ##__VA_ARGS__) |
611 | #endif |
612 | |
613 | #define pr_emerg_once(fmt, ...) \ |
614 | printk_once(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__) |
615 | #define pr_alert_once(fmt, ...) \ |
616 | printk_once(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__) |
617 | #define pr_crit_once(fmt, ...) \ |
618 | printk_once(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__) |
619 | #define pr_err_once(fmt, ...) \ |
620 | printk_once(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__) |
621 | #define pr_warn_once(fmt, ...) \ |
622 | printk_once(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__) |
623 | #define pr_notice_once(fmt, ...) \ |
624 | printk_once(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__) |
625 | #define pr_info_once(fmt, ...) \ |
626 | printk_once(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__) |
627 | /* no pr_cont_once, don't do that... */ |
628 | |
629 | #if defined(DEBUG) |
630 | #define pr_devel_once(fmt, ...) \ |
631 | printk_once(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) |
632 | #else |
633 | #define pr_devel_once(fmt, ...) \ |
634 | no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) |
635 | #endif |
636 | |
637 | /* If you are writing a driver, please use dev_dbg instead */ |
638 | #if defined(DEBUG) |
639 | #define pr_debug_once(fmt, ...) \ |
640 | printk_once(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) |
641 | #else |
642 | #define pr_debug_once(fmt, ...) \ |
643 | no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) |
644 | #endif |
645 | |
646 | /* |
647 | * ratelimited messages with local ratelimit_state, |
648 | * no local ratelimit_state used in the !PRINTK case |
649 | */ |
650 | #ifdef CONFIG_PRINTK |
651 | #define printk_ratelimited(fmt, ...) \ |
652 | ({ \ |
653 | static DEFINE_RATELIMIT_STATE(_rs, \ |
654 | DEFAULT_RATELIMIT_INTERVAL, \ |
655 | DEFAULT_RATELIMIT_BURST); \ |
656 | \ |
657 | if (__ratelimit(&_rs)) \ |
658 | printk(fmt, ##__VA_ARGS__); \ |
659 | }) |
660 | #else |
661 | #define printk_ratelimited(fmt, ...) \ |
662 | no_printk(fmt, ##__VA_ARGS__) |
663 | #endif |
664 | |
665 | #define pr_emerg_ratelimited(fmt, ...) \ |
666 | printk_ratelimited(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__) |
667 | #define pr_alert_ratelimited(fmt, ...) \ |
668 | printk_ratelimited(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__) |
669 | #define pr_crit_ratelimited(fmt, ...) \ |
670 | printk_ratelimited(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__) |
671 | #define pr_err_ratelimited(fmt, ...) \ |
672 | printk_ratelimited(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__) |
673 | #define pr_warn_ratelimited(fmt, ...) \ |
674 | printk_ratelimited(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__) |
675 | #define pr_notice_ratelimited(fmt, ...) \ |
676 | printk_ratelimited(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__) |
677 | #define pr_info_ratelimited(fmt, ...) \ |
678 | printk_ratelimited(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__) |
679 | /* no pr_cont_ratelimited, don't do that... */ |
680 | |
681 | #if defined(DEBUG) |
682 | #define pr_devel_ratelimited(fmt, ...) \ |
683 | printk_ratelimited(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) |
684 | #else |
685 | #define pr_devel_ratelimited(fmt, ...) \ |
686 | no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) |
687 | #endif |
688 | |
689 | /* If you are writing a driver, please use dev_dbg instead */ |
690 | #if defined(CONFIG_DYNAMIC_DEBUG) || \ |
691 | (defined(CONFIG_DYNAMIC_DEBUG_CORE) && defined(DYNAMIC_DEBUG_MODULE)) |
692 | /* descriptor check is first to prevent flooding with "callbacks suppressed" */ |
693 | #define pr_debug_ratelimited(fmt, ...) \ |
694 | do { \ |
695 | static DEFINE_RATELIMIT_STATE(_rs, \ |
696 | DEFAULT_RATELIMIT_INTERVAL, \ |
697 | DEFAULT_RATELIMIT_BURST); \ |
698 | DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, pr_fmt(fmt)); \ |
699 | if (DYNAMIC_DEBUG_BRANCH(descriptor) && \ |
700 | __ratelimit(&_rs)) \ |
701 | __dynamic_pr_debug(&descriptor, pr_fmt(fmt), ##__VA_ARGS__); \ |
702 | } while (0) |
703 | #elif defined(DEBUG) |
704 | #define pr_debug_ratelimited(fmt, ...) \ |
705 | printk_ratelimited(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) |
706 | #else |
707 | #define pr_debug_ratelimited(fmt, ...) \ |
708 | no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) |
709 | #endif |
710 | |
711 | extern const struct file_operations kmsg_fops; |
712 | |
713 | enum { |
714 | DUMP_PREFIX_NONE, |
715 | DUMP_PREFIX_ADDRESS, |
716 | DUMP_PREFIX_OFFSET |
717 | }; |
718 | extern int hex_dump_to_buffer(const void *buf, size_t len, int rowsize, |
719 | int groupsize, char *linebuf, size_t linebuflen, |
720 | bool ascii); |
721 | #ifdef CONFIG_PRINTK |
722 | extern void print_hex_dump(const char *level, const char *prefix_str, |
723 | int prefix_type, int rowsize, int groupsize, |
724 | const void *buf, size_t len, bool ascii); |
725 | #else |
726 | static inline void print_hex_dump(const char *level, const char *prefix_str, |
727 | int prefix_type, int rowsize, int groupsize, |
728 | const void *buf, size_t len, bool ascii) |
729 | { |
730 | } |
731 | static inline void print_hex_dump_bytes(const char *prefix_str, int prefix_type, |
732 | const void *buf, size_t len) |
733 | { |
734 | } |
735 | |
736 | #endif |
737 | |
738 | #if defined(CONFIG_DYNAMIC_DEBUG) || \ |
739 | (defined(CONFIG_DYNAMIC_DEBUG_CORE) && defined(DYNAMIC_DEBUG_MODULE)) |
740 | #define print_hex_dump_debug(prefix_str, prefix_type, rowsize, \ |
741 | groupsize, buf, len, ascii) \ |
742 | dynamic_hex_dump(prefix_str, prefix_type, rowsize, \ |
743 | groupsize, buf, len, ascii) |
744 | #elif defined(DEBUG) |
745 | #define print_hex_dump_debug(prefix_str, prefix_type, rowsize, \ |
746 | groupsize, buf, len, ascii) \ |
747 | print_hex_dump(KERN_DEBUG, prefix_str, prefix_type, rowsize, \ |
748 | groupsize, buf, len, ascii) |
749 | #else |
750 | static inline void print_hex_dump_debug(const char *prefix_str, int prefix_type, |
751 | int rowsize, int groupsize, |
752 | const void *buf, size_t len, bool ascii) |
753 | { |
754 | } |
755 | #endif |
756 | |
757 | /** |
758 | * print_hex_dump_bytes - shorthand form of print_hex_dump() with default params |
759 | * @prefix_str: string to prefix each line with; |
760 | * caller supplies trailing spaces for alignment if desired |
761 | * @prefix_type: controls whether prefix of an offset, address, or none |
762 | * is printed (%DUMP_PREFIX_OFFSET, %DUMP_PREFIX_ADDRESS, %DUMP_PREFIX_NONE) |
763 | * @buf: data blob to dump |
764 | * @len: number of bytes in the @buf |
765 | * |
766 | * Calls print_hex_dump(), with log level of KERN_DEBUG, |
767 | * rowsize of 16, groupsize of 1, and ASCII output included. |
768 | */ |
769 | #define print_hex_dump_bytes(prefix_str, prefix_type, buf, len) \ |
770 | print_hex_dump_debug(prefix_str, prefix_type, 16, 1, buf, len, true) |
771 | |
772 | #endif |
773 | |