1 #ifndef __KERNEL_PRINTK__
2 #define __KERNEL_PRINTK__
5 #include <linux/init.h>
6 #include <linux/kern_levels.h>
7 #include <linux/linkage.h>
9 extern const char linux_banner[];
10 extern const char linux_proc_banner[];
12 static inline int printk_get_level(const char *buffer)
14 if (buffer[0] == KERN_SOH_ASCII && buffer[1]) {
17 case 'd': /* KERN_DEFAULT */
24 static inline const char *printk_skip_level(const char *buffer)
26 if (printk_get_level(buffer)) {
29 case 'd': /* KERN_DEFAULT */
36 extern int console_printk[];
38 #define console_loglevel (console_printk[0])
39 #define default_message_loglevel (console_printk[1])
40 #define minimum_console_loglevel (console_printk[2])
41 #define default_console_loglevel (console_printk[3])
43 static inline void console_silent(void)
48 static inline void console_verbose(void)
51 console_loglevel = 15;
61 * Add this to a message where you are sure the firmware is buggy or behaves
62 * really stupid or out of spec. Be aware that the responsible BIOS developer
63 * should be able to fix this issue or at least get a concrete idea of the
64 * problem by reading your message without the need of looking at the kernel
67 * Use it for definite and high priority BIOS bugs.
70 * Use it for not that clear (e.g. could the kernel messed up things already?)
71 * and medium priority BIOS bugs.
74 * Use this one if you want to tell the user or vendor about something
75 * suspicious, but generally harmless related to the firmware.
77 * Use it for information or very low priority BIOS bugs.
79 #define FW_BUG "[Firmware Bug]: "
80 #define FW_WARN "[Firmware Warn]: "
81 #define FW_INFO "[Firmware Info]: "
85 * Add this to a message for hardware errors, so that user can report
86 * it to hardware vendor instead of LKML or software vendor.
88 #define HW_ERR "[Hardware Error]: "
91 * Dummy printk for disabled debugging statements to use whilst maintaining
92 * gcc's format and side-effect checking.
94 static inline __printf(1, 2)
95 int no_printk(const char *fmt, ...)
100 #ifdef CONFIG_EARLY_PRINTK
101 extern asmlinkage __printf(1, 2)
102 void early_printk(const char *fmt, ...);
103 void early_vprintk(const char *fmt, va_list ap);
105 static inline __printf(1, 2) __cold
106 void early_printk(const char *s, ...) { }
110 asmlinkage __printf(5, 0)
111 int vprintk_emit(int facility, int level,
112 const char *dict, size_t dictlen,
113 const char *fmt, va_list args);
115 asmlinkage __printf(1, 0)
116 int vprintk(const char *fmt, va_list args);
118 asmlinkage __printf(5, 6) __cold
119 asmlinkage int printk_emit(int facility, int level,
120 const char *dict, size_t dictlen,
121 const char *fmt, ...);
123 asmlinkage __printf(1, 2) __cold
124 int printk(const char *fmt, ...);
127 * Special printk facility for scheduler use only, _DO_NOT_USE_ !
129 __printf(1, 2) __cold int printk_sched(const char *fmt, ...);
132 * Please don't use printk_ratelimit(), because it shares ratelimiting state
133 * with all other unrelated printk_ratelimit() callsites. Instead use
134 * printk_ratelimited() or plain old __ratelimit().
136 extern int __printk_ratelimit(const char *func);
137 #define printk_ratelimit() __printk_ratelimit(__func__)
138 extern bool printk_timed_ratelimit(unsigned long *caller_jiffies,
139 unsigned int interval_msec);
141 extern int printk_delay_msec;
142 extern int dmesg_restrict;
143 extern int kptr_restrict;
145 extern void wake_up_klogd(void);
147 void log_buf_kexec_setup(void);
148 void __init setup_log_buf(int early);
149 void dump_stack_set_arch_desc(const char *fmt, ...);
150 void dump_stack_print_info(const char *log_lvl);
151 void show_regs_print_info(const char *log_lvl);
153 static inline __printf(1, 0)
154 int vprintk(const char *s, va_list args)
158 static inline __printf(1, 2) __cold
159 int printk(const char *s, ...)
163 static inline __printf(1, 2) __cold
164 int printk_sched(const char *s, ...)
168 static inline int printk_ratelimit(void)
172 static inline bool printk_timed_ratelimit(unsigned long *caller_jiffies,
173 unsigned int interval_msec)
178 static inline void wake_up_klogd(void)
182 static inline void log_buf_kexec_setup(void)
186 static inline void setup_log_buf(int early)
190 static inline void dump_stack_set_arch_desc(const char *fmt, ...)
194 static inline void dump_stack_print_info(const char *log_lvl)
198 static inline void show_regs_print_info(const char *log_lvl)
203 extern asmlinkage void dump_stack(void) __cold;
206 #define pr_fmt(fmt) fmt
209 #define pr_emerg(fmt, ...) \
210 printk(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
211 #define pr_alert(fmt, ...) \
212 printk(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
213 #define pr_crit(fmt, ...) \
214 printk(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
215 #define pr_err(fmt, ...) \
216 printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
217 #define pr_warning(fmt, ...) \
218 printk(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
219 #define pr_warn pr_warning
220 #define pr_notice(fmt, ...) \
221 printk(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
222 #define pr_info(fmt, ...) \
223 printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
224 #define pr_cont(fmt, ...) \
225 printk(KERN_CONT fmt, ##__VA_ARGS__)
227 /* pr_devel() should produce zero code unless DEBUG is defined */
229 #define pr_devel(fmt, ...) \
230 printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
232 #define pr_devel(fmt, ...) \
233 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
236 #include <linux/dynamic_debug.h>
238 /* If you are writing a driver, please use dev_dbg instead */
239 #if defined(CONFIG_DYNAMIC_DEBUG)
240 /* dynamic_pr_debug() uses pr_fmt() internally so we don't need it here */
241 #define pr_debug(fmt, ...) \
242 dynamic_pr_debug(fmt, ##__VA_ARGS__)
244 #define pr_debug(fmt, ...) \
245 printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
247 #define pr_debug(fmt, ...) \
248 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
252 * Print a one-time message (analogous to WARN_ONCE() et al):
256 #define printk_once(fmt, ...) \
258 static bool __print_once; \
260 if (!__print_once) { \
261 __print_once = true; \
262 printk(fmt, ##__VA_ARGS__); \
266 #define printk_once(fmt, ...) \
267 no_printk(fmt, ##__VA_ARGS__)
270 #define pr_emerg_once(fmt, ...) \
271 printk_once(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
272 #define pr_alert_once(fmt, ...) \
273 printk_once(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
274 #define pr_crit_once(fmt, ...) \
275 printk_once(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
276 #define pr_err_once(fmt, ...) \
277 printk_once(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
278 #define pr_warn_once(fmt, ...) \
279 printk_once(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
280 #define pr_notice_once(fmt, ...) \
281 printk_once(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
282 #define pr_info_once(fmt, ...) \
283 printk_once(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
284 #define pr_cont_once(fmt, ...) \
285 printk_once(KERN_CONT pr_fmt(fmt), ##__VA_ARGS__)
288 #define pr_devel_once(fmt, ...) \
289 printk_once(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
291 #define pr_devel_once(fmt, ...) \
292 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
295 /* If you are writing a driver, please use dev_dbg instead */
297 #define pr_debug_once(fmt, ...) \
298 printk_once(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
300 #define pr_debug_once(fmt, ...) \
301 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
305 * ratelimited messages with local ratelimit_state,
306 * no local ratelimit_state used in the !PRINTK case
309 #define printk_ratelimited(fmt, ...) \
311 static DEFINE_RATELIMIT_STATE(_rs, \
312 DEFAULT_RATELIMIT_INTERVAL, \
313 DEFAULT_RATELIMIT_BURST); \
315 if (__ratelimit(&_rs)) \
316 printk(fmt, ##__VA_ARGS__); \
319 #define printk_ratelimited(fmt, ...) \
320 no_printk(fmt, ##__VA_ARGS__)
323 #define pr_emerg_ratelimited(fmt, ...) \
324 printk_ratelimited(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
325 #define pr_alert_ratelimited(fmt, ...) \
326 printk_ratelimited(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
327 #define pr_crit_ratelimited(fmt, ...) \
328 printk_ratelimited(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
329 #define pr_err_ratelimited(fmt, ...) \
330 printk_ratelimited(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
331 #define pr_warn_ratelimited(fmt, ...) \
332 printk_ratelimited(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
333 #define pr_notice_ratelimited(fmt, ...) \
334 printk_ratelimited(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
335 #define pr_info_ratelimited(fmt, ...) \
336 printk_ratelimited(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
337 /* no pr_cont_ratelimited, don't do that... */
340 #define pr_devel_ratelimited(fmt, ...) \
341 printk_ratelimited(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
343 #define pr_devel_ratelimited(fmt, ...) \
344 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
347 /* If you are writing a driver, please use dev_dbg instead */
348 #if defined(CONFIG_DYNAMIC_DEBUG)
349 /* descriptor check is first to prevent flooding with "callbacks suppressed" */
350 #define pr_debug_ratelimited(fmt, ...) \
352 static DEFINE_RATELIMIT_STATE(_rs, \
353 DEFAULT_RATELIMIT_INTERVAL, \
354 DEFAULT_RATELIMIT_BURST); \
355 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
356 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT) && \
358 __dynamic_pr_debug(&descriptor, fmt, ##__VA_ARGS__); \
361 #define pr_debug_ratelimited(fmt, ...) \
362 printk_ratelimited(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
364 #define pr_debug_ratelimited(fmt, ...) \
365 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
368 extern const struct file_operations kmsg_fops;
375 extern void hex_dump_to_buffer(const void *buf, size_t len,
376 int rowsize, int groupsize,
377 char *linebuf, size_t linebuflen, bool ascii);
379 extern void print_hex_dump(const char *level, const char *prefix_str,
380 int prefix_type, int rowsize, int groupsize,
381 const void *buf, size_t len, bool ascii);
382 #if defined(CONFIG_DYNAMIC_DEBUG)
383 #define print_hex_dump_bytes(prefix_str, prefix_type, buf, len) \
384 dynamic_hex_dump(prefix_str, prefix_type, 16, 1, buf, len, true)
386 extern void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
387 const void *buf, size_t len);
388 #endif /* defined(CONFIG_DYNAMIC_DEBUG) */
390 static inline void print_hex_dump(const char *level, const char *prefix_str,
391 int prefix_type, int rowsize, int groupsize,
392 const void *buf, size_t len, bool ascii)
395 static inline void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
396 const void *buf, size_t len)
402 #if defined(CONFIG_DYNAMIC_DEBUG)
403 #define print_hex_dump_debug(prefix_str, prefix_type, rowsize, \
404 groupsize, buf, len, ascii) \
405 dynamic_hex_dump(prefix_str, prefix_type, rowsize, \
406 groupsize, buf, len, ascii)
408 #define print_hex_dump_debug(prefix_str, prefix_type, rowsize, \
409 groupsize, buf, len, ascii) \
410 print_hex_dump(KERN_DEBUG, prefix_str, prefix_type, rowsize, \
411 groupsize, buf, len, ascii)
412 #endif /* defined(CONFIG_DYNAMIC_DEBUG) */