1 #ifndef __KERNEL_PRINTK__
2 #define __KERNEL_PRINTK__
5 #include <linux/init.h>
6 #include <linux/kern_levels.h>
8 extern const char linux_banner[];
9 extern const char linux_proc_banner[];
11 static inline int printk_get_level(const char *buffer)
13 if (buffer[0] == KERN_SOH_ASCII && buffer[1]) {
16 case 'd': /* KERN_DEFAULT */
23 static inline const char *printk_skip_level(const char *buffer)
25 if (printk_get_level(buffer)) {
28 case 'd': /* KERN_DEFAULT */
35 extern int console_printk[];
37 #define console_loglevel (console_printk[0])
38 #define default_message_loglevel (console_printk[1])
39 #define minimum_console_loglevel (console_printk[2])
40 #define default_console_loglevel (console_printk[3])
42 static inline void console_silent(void)
47 static inline void console_verbose(void)
50 console_loglevel = 15;
60 * Add this to a message where you are sure the firmware is buggy or behaves
61 * really stupid or out of spec. Be aware that the responsible BIOS developer
62 * should be able to fix this issue or at least get a concrete idea of the
63 * problem by reading your message without the need of looking at the kernel
66 * Use it for definite and high priority BIOS bugs.
69 * Use it for not that clear (e.g. could the kernel messed up things already?)
70 * and medium priority BIOS bugs.
73 * Use this one if you want to tell the user or vendor about something
74 * suspicious, but generally harmless related to the firmware.
76 * Use it for information or very low priority BIOS bugs.
78 #define FW_BUG "[Firmware Bug]: "
79 #define FW_WARN "[Firmware Warn]: "
80 #define FW_INFO "[Firmware Info]: "
84 * Add this to a message for hardware errors, so that user can report
85 * it to hardware vendor instead of LKML or software vendor.
87 #define HW_ERR "[Hardware Error]: "
90 * Dummy printk for disabled debugging statements to use whilst maintaining
91 * gcc's format and side-effect checking.
93 static inline __printf(1, 2)
94 int no_printk(const char *fmt, ...)
99 #ifdef CONFIG_EARLY_PRINTK
100 extern asmlinkage __printf(1, 2)
101 void early_printk(const char *fmt, ...);
102 void early_vprintk(const char *fmt, va_list ap);
104 static inline __printf(1, 2) __cold
105 void early_printk(const char *s, ...) { }
109 asmlinkage __printf(5, 0)
110 int vprintk_emit(int facility, int level,
111 const char *dict, size_t dictlen,
112 const char *fmt, va_list args);
114 asmlinkage __printf(1, 0)
115 int vprintk(const char *fmt, va_list args);
117 asmlinkage __printf(5, 6) __cold
118 asmlinkage int printk_emit(int facility, int level,
119 const char *dict, size_t dictlen,
120 const char *fmt, ...);
122 asmlinkage __printf(1, 2) __cold
123 int printk(const char *fmt, ...);
126 * Special printk facility for scheduler use only, _DO_NOT_USE_ !
128 __printf(1, 2) __cold int printk_sched(const char *fmt, ...);
131 * Please don't use printk_ratelimit(), because it shares ratelimiting state
132 * with all other unrelated printk_ratelimit() callsites. Instead use
133 * printk_ratelimited() or plain old __ratelimit().
135 extern int __printk_ratelimit(const char *func);
136 #define printk_ratelimit() __printk_ratelimit(__func__)
137 extern bool printk_timed_ratelimit(unsigned long *caller_jiffies,
138 unsigned int interval_msec);
140 extern int printk_delay_msec;
141 extern int dmesg_restrict;
142 extern int kptr_restrict;
144 extern void wake_up_klogd(void);
146 void log_buf_kexec_setup(void);
147 void __init setup_log_buf(int early);
148 void dump_stack_set_arch_desc(const char *fmt, ...);
149 void dump_stack_print_info(const char *log_lvl);
150 void show_regs_print_info(const char *log_lvl);
152 static inline __printf(1, 0)
153 int vprintk(const char *s, va_list args)
157 static inline __printf(1, 2) __cold
158 int printk(const char *s, ...)
162 static inline __printf(1, 2) __cold
163 int printk_sched(const char *s, ...)
167 static inline int printk_ratelimit(void)
171 static inline bool printk_timed_ratelimit(unsigned long *caller_jiffies,
172 unsigned int interval_msec)
177 static inline void wake_up_klogd(void)
181 static inline void log_buf_kexec_setup(void)
185 static inline void setup_log_buf(int early)
189 static inline void dump_stack_set_arch_desc(const char *fmt, ...)
193 static inline void dump_stack_print_info(const char *log_lvl)
197 static inline void show_regs_print_info(const char *log_lvl)
202 extern void dump_stack(void) __cold;
205 #define pr_fmt(fmt) fmt
208 #define pr_emerg(fmt, ...) \
209 printk(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
210 #define pr_alert(fmt, ...) \
211 printk(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
212 #define pr_crit(fmt, ...) \
213 printk(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
214 #define pr_err(fmt, ...) \
215 printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
216 #define pr_warning(fmt, ...) \
217 printk(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
218 #define pr_warn pr_warning
219 #define pr_notice(fmt, ...) \
220 printk(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
221 #define pr_info(fmt, ...) \
222 printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
223 #define pr_cont(fmt, ...) \
224 printk(KERN_CONT fmt, ##__VA_ARGS__)
226 /* pr_devel() should produce zero code unless DEBUG is defined */
228 #define pr_devel(fmt, ...) \
229 printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
231 #define pr_devel(fmt, ...) \
232 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
235 /* If you are writing a driver, please use dev_dbg instead */
236 #if defined(CONFIG_DYNAMIC_DEBUG)
237 /* dynamic_pr_debug() uses pr_fmt() internally so we don't need it here */
238 #define pr_debug(fmt, ...) \
239 dynamic_pr_debug(fmt, ##__VA_ARGS__)
241 #define pr_debug(fmt, ...) \
242 printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
244 #define pr_debug(fmt, ...) \
245 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
249 * Print a one-time message (analogous to WARN_ONCE() et al):
253 #define printk_once(fmt, ...) \
255 static bool __print_once; \
257 if (!__print_once) { \
258 __print_once = true; \
259 printk(fmt, ##__VA_ARGS__); \
263 #define printk_once(fmt, ...) \
264 no_printk(fmt, ##__VA_ARGS__)
267 #define pr_emerg_once(fmt, ...) \
268 printk_once(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
269 #define pr_alert_once(fmt, ...) \
270 printk_once(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
271 #define pr_crit_once(fmt, ...) \
272 printk_once(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
273 #define pr_err_once(fmt, ...) \
274 printk_once(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
275 #define pr_warn_once(fmt, ...) \
276 printk_once(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
277 #define pr_notice_once(fmt, ...) \
278 printk_once(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
279 #define pr_info_once(fmt, ...) \
280 printk_once(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
281 #define pr_cont_once(fmt, ...) \
282 printk_once(KERN_CONT pr_fmt(fmt), ##__VA_ARGS__)
285 #define pr_devel_once(fmt, ...) \
286 printk_once(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
288 #define pr_devel_once(fmt, ...) \
289 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
292 /* If you are writing a driver, please use dev_dbg instead */
294 #define pr_debug_once(fmt, ...) \
295 printk_once(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
297 #define pr_debug_once(fmt, ...) \
298 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
302 * ratelimited messages with local ratelimit_state,
303 * no local ratelimit_state used in the !PRINTK case
306 #define printk_ratelimited(fmt, ...) \
308 static DEFINE_RATELIMIT_STATE(_rs, \
309 DEFAULT_RATELIMIT_INTERVAL, \
310 DEFAULT_RATELIMIT_BURST); \
312 if (__ratelimit(&_rs)) \
313 printk(fmt, ##__VA_ARGS__); \
316 #define printk_ratelimited(fmt, ...) \
317 no_printk(fmt, ##__VA_ARGS__)
320 #define pr_emerg_ratelimited(fmt, ...) \
321 printk_ratelimited(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
322 #define pr_alert_ratelimited(fmt, ...) \
323 printk_ratelimited(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
324 #define pr_crit_ratelimited(fmt, ...) \
325 printk_ratelimited(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
326 #define pr_err_ratelimited(fmt, ...) \
327 printk_ratelimited(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
328 #define pr_warn_ratelimited(fmt, ...) \
329 printk_ratelimited(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
330 #define pr_notice_ratelimited(fmt, ...) \
331 printk_ratelimited(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
332 #define pr_info_ratelimited(fmt, ...) \
333 printk_ratelimited(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
334 /* no pr_cont_ratelimited, don't do that... */
337 #define pr_devel_ratelimited(fmt, ...) \
338 printk_ratelimited(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
340 #define pr_devel_ratelimited(fmt, ...) \
341 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
344 /* If you are writing a driver, please use dev_dbg instead */
346 #define pr_debug_ratelimited(fmt, ...) \
347 printk_ratelimited(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
349 #define pr_debug_ratelimited(fmt, ...) \
350 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
353 extern const struct file_operations kmsg_fops;
360 extern void hex_dump_to_buffer(const void *buf, size_t len,
361 int rowsize, int groupsize,
362 char *linebuf, size_t linebuflen, bool ascii);
364 extern void print_hex_dump(const char *level, const char *prefix_str,
365 int prefix_type, int rowsize, int groupsize,
366 const void *buf, size_t len, bool ascii);
367 #if defined(CONFIG_DYNAMIC_DEBUG)
368 #define print_hex_dump_bytes(prefix_str, prefix_type, buf, len) \
369 dynamic_hex_dump(prefix_str, prefix_type, 16, 1, buf, len, true)
371 extern void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
372 const void *buf, size_t len);
373 #endif /* defined(CONFIG_DYNAMIC_DEBUG) */
375 static inline void print_hex_dump(const char *level, const char *prefix_str,
376 int prefix_type, int rowsize, int groupsize,
377 const void *buf, size_t len, bool ascii)
380 static inline void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
381 const void *buf, size_t len)
387 #if defined(CONFIG_DYNAMIC_DEBUG)
388 #define print_hex_dump_debug(prefix_str, prefix_type, rowsize, \
389 groupsize, buf, len, ascii) \
390 dynamic_hex_dump(prefix_str, prefix_type, rowsize, \
391 groupsize, buf, len, ascii)
393 #define print_hex_dump_debug(prefix_str, prefix_type, rowsize, \
394 groupsize, buf, len, ascii) \
395 print_hex_dump(KERN_DEBUG, prefix_str, prefix_type, rowsize, \
396 groupsize, buf, len, ascii)
397 #endif /* defined(CONFIG_DYNAMIC_DEBUG) */