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 /* If you are writing a driver, please use dev_dbg instead */
237 #if defined(CONFIG_DYNAMIC_DEBUG)
238 /* dynamic_pr_debug() uses pr_fmt() internally so we don't need it here */
239 #define pr_debug(fmt, ...) \
240 dynamic_pr_debug(fmt, ##__VA_ARGS__)
242 #define pr_debug(fmt, ...) \
243 printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
245 #define pr_debug(fmt, ...) \
246 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
250 * Print a one-time message (analogous to WARN_ONCE() et al):
254 #define printk_once(fmt, ...) \
256 static bool __print_once; \
258 if (!__print_once) { \
259 __print_once = true; \
260 printk(fmt, ##__VA_ARGS__); \
264 #define printk_once(fmt, ...) \
265 no_printk(fmt, ##__VA_ARGS__)
268 #define pr_emerg_once(fmt, ...) \
269 printk_once(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
270 #define pr_alert_once(fmt, ...) \
271 printk_once(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
272 #define pr_crit_once(fmt, ...) \
273 printk_once(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
274 #define pr_err_once(fmt, ...) \
275 printk_once(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
276 #define pr_warn_once(fmt, ...) \
277 printk_once(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
278 #define pr_notice_once(fmt, ...) \
279 printk_once(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
280 #define pr_info_once(fmt, ...) \
281 printk_once(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
282 #define pr_cont_once(fmt, ...) \
283 printk_once(KERN_CONT pr_fmt(fmt), ##__VA_ARGS__)
286 #define pr_devel_once(fmt, ...) \
287 printk_once(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
289 #define pr_devel_once(fmt, ...) \
290 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
293 /* If you are writing a driver, please use dev_dbg instead */
295 #define pr_debug_once(fmt, ...) \
296 printk_once(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
298 #define pr_debug_once(fmt, ...) \
299 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
303 * ratelimited messages with local ratelimit_state,
304 * no local ratelimit_state used in the !PRINTK case
307 #define printk_ratelimited(fmt, ...) \
309 static DEFINE_RATELIMIT_STATE(_rs, \
310 DEFAULT_RATELIMIT_INTERVAL, \
311 DEFAULT_RATELIMIT_BURST); \
313 if (__ratelimit(&_rs)) \
314 printk(fmt, ##__VA_ARGS__); \
317 #define printk_ratelimited(fmt, ...) \
318 no_printk(fmt, ##__VA_ARGS__)
321 #define pr_emerg_ratelimited(fmt, ...) \
322 printk_ratelimited(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
323 #define pr_alert_ratelimited(fmt, ...) \
324 printk_ratelimited(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
325 #define pr_crit_ratelimited(fmt, ...) \
326 printk_ratelimited(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
327 #define pr_err_ratelimited(fmt, ...) \
328 printk_ratelimited(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
329 #define pr_warn_ratelimited(fmt, ...) \
330 printk_ratelimited(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
331 #define pr_notice_ratelimited(fmt, ...) \
332 printk_ratelimited(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
333 #define pr_info_ratelimited(fmt, ...) \
334 printk_ratelimited(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
335 /* no pr_cont_ratelimited, don't do that... */
338 #define pr_devel_ratelimited(fmt, ...) \
339 printk_ratelimited(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
341 #define pr_devel_ratelimited(fmt, ...) \
342 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
345 /* If you are writing a driver, please use dev_dbg instead */
347 #define pr_debug_ratelimited(fmt, ...) \
348 printk_ratelimited(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
350 #define pr_debug_ratelimited(fmt, ...) \
351 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
354 extern const struct file_operations kmsg_fops;
361 extern void hex_dump_to_buffer(const void *buf, size_t len,
362 int rowsize, int groupsize,
363 char *linebuf, size_t linebuflen, bool ascii);
365 extern void print_hex_dump(const char *level, const char *prefix_str,
366 int prefix_type, int rowsize, int groupsize,
367 const void *buf, size_t len, bool ascii);
368 #if defined(CONFIG_DYNAMIC_DEBUG)
369 #define print_hex_dump_bytes(prefix_str, prefix_type, buf, len) \
370 dynamic_hex_dump(prefix_str, prefix_type, 16, 1, buf, len, true)
372 extern void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
373 const void *buf, size_t len);
374 #endif /* defined(CONFIG_DYNAMIC_DEBUG) */
376 static inline void print_hex_dump(const char *level, const char *prefix_str,
377 int prefix_type, int rowsize, int groupsize,
378 const void *buf, size_t len, bool ascii)
381 static inline void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
382 const void *buf, size_t len)
388 #if defined(CONFIG_DYNAMIC_DEBUG)
389 #define print_hex_dump_debug(prefix_str, prefix_type, rowsize, \
390 groupsize, buf, len, ascii) \
391 dynamic_hex_dump(prefix_str, prefix_type, rowsize, \
392 groupsize, buf, len, ascii)
394 #define print_hex_dump_debug(prefix_str, prefix_type, rowsize, \
395 groupsize, buf, len, ascii) \
396 print_hex_dump(KERN_DEBUG, prefix_str, prefix_type, rowsize, \
397 groupsize, buf, len, ascii)
398 #endif /* defined(CONFIG_DYNAMIC_DEBUG) */