1 #ifndef __KERNEL_PRINTK__
2 #define __KERNEL_PRINTK__
5 #include <linux/init.h>
6 #include <linux/kern_levels.h>
7 #include <linux/linkage.h>
8 #include <linux/cache.h>
10 extern const char linux_banner[];
11 extern const char linux_proc_banner[];
13 static inline int printk_get_level(const char *buffer)
15 if (buffer[0] == KERN_SOH_ASCII && buffer[1]) {
18 case 'd': /* KERN_DEFAULT */
25 static inline const char *printk_skip_level(const char *buffer)
27 if (printk_get_level(buffer)) {
30 case 'd': /* KERN_DEFAULT */
37 extern int console_printk[];
39 #define console_loglevel (console_printk[0])
40 #define default_message_loglevel (console_printk[1])
41 #define minimum_console_loglevel (console_printk[2])
42 #define default_console_loglevel (console_printk[3])
44 static inline void console_silent(void)
49 static inline void console_verbose(void)
52 console_loglevel = 15;
62 * Add this to a message where you are sure the firmware is buggy or behaves
63 * really stupid or out of spec. Be aware that the responsible BIOS developer
64 * should be able to fix this issue or at least get a concrete idea of the
65 * problem by reading your message without the need of looking at the kernel
68 * Use it for definite and high priority BIOS bugs.
71 * Use it for not that clear (e.g. could the kernel messed up things already?)
72 * and medium priority BIOS bugs.
75 * Use this one if you want to tell the user or vendor about something
76 * suspicious, but generally harmless related to the firmware.
78 * Use it for information or very low priority BIOS bugs.
80 #define FW_BUG "[Firmware Bug]: "
81 #define FW_WARN "[Firmware Warn]: "
82 #define FW_INFO "[Firmware Info]: "
86 * Add this to a message for hardware errors, so that user can report
87 * it to hardware vendor instead of LKML or software vendor.
89 #define HW_ERR "[Hardware Error]: "
93 * Add this to a message whenever you want to warn user space about the use
94 * of a deprecated aspect of an API so they can stop using it
96 #define DEPRECATED "[Deprecated]: "
99 * Dummy printk for disabled debugging statements to use whilst maintaining
100 * gcc's format and side-effect checking.
102 static inline __printf(1, 2)
103 int no_printk(const char *fmt, ...)
108 #ifdef CONFIG_EARLY_PRINTK
109 extern asmlinkage __printf(1, 2)
110 void early_printk(const char *fmt, ...);
111 void early_vprintk(const char *fmt, va_list ap);
113 static inline __printf(1, 2) __cold
114 void early_printk(const char *s, ...) { }
118 asmlinkage __printf(5, 0)
119 int vprintk_emit(int facility, int level,
120 const char *dict, size_t dictlen,
121 const char *fmt, va_list args);
123 asmlinkage __printf(1, 0)
124 int vprintk(const char *fmt, va_list args);
126 asmlinkage __printf(5, 6) __cold
127 asmlinkage int printk_emit(int facility, int level,
128 const char *dict, size_t dictlen,
129 const char *fmt, ...);
131 asmlinkage __printf(1, 2) __cold
132 int printk(const char *fmt, ...);
135 * Special printk facility for scheduler use only, _DO_NOT_USE_ !
137 __printf(1, 2) __cold int printk_sched(const char *fmt, ...);
140 * Please don't use printk_ratelimit(), because it shares ratelimiting state
141 * with all other unrelated printk_ratelimit() callsites. Instead use
142 * printk_ratelimited() or plain old __ratelimit().
144 extern int __printk_ratelimit(const char *func);
145 #define printk_ratelimit() __printk_ratelimit(__func__)
146 extern bool printk_timed_ratelimit(unsigned long *caller_jiffies,
147 unsigned int interval_msec);
149 extern int printk_delay_msec;
150 extern int dmesg_restrict;
151 extern int kptr_restrict;
153 extern void wake_up_klogd(void);
155 void log_buf_kexec_setup(void);
156 void __init setup_log_buf(int early);
157 void dump_stack_set_arch_desc(const char *fmt, ...);
158 void dump_stack_print_info(const char *log_lvl);
159 void show_regs_print_info(const char *log_lvl);
161 static inline __printf(1, 0)
162 int vprintk(const char *s, va_list args)
166 static inline __printf(1, 2) __cold
167 int printk(const char *s, ...)
171 static inline __printf(1, 2) __cold
172 int printk_sched(const char *s, ...)
176 static inline int printk_ratelimit(void)
180 static inline bool printk_timed_ratelimit(unsigned long *caller_jiffies,
181 unsigned int interval_msec)
186 static inline void wake_up_klogd(void)
190 static inline void log_buf_kexec_setup(void)
194 static inline void setup_log_buf(int early)
198 static inline void dump_stack_set_arch_desc(const char *fmt, ...)
202 static inline void dump_stack_print_info(const char *log_lvl)
206 static inline void show_regs_print_info(const char *log_lvl)
211 extern asmlinkage void dump_stack(void) __cold;
214 #define pr_fmt(fmt) fmt
217 #define pr_emerg(fmt, ...) \
218 printk(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
219 #define pr_alert(fmt, ...) \
220 printk(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
221 #define pr_crit(fmt, ...) \
222 printk(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
223 #define pr_err(fmt, ...) \
224 printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
225 #define pr_warning(fmt, ...) \
226 printk(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
227 #define pr_warn pr_warning
228 #define pr_notice(fmt, ...) \
229 printk(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
230 #define pr_info(fmt, ...) \
231 printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
232 #define pr_cont(fmt, ...) \
233 printk(KERN_CONT fmt, ##__VA_ARGS__)
235 /* pr_devel() should produce zero code unless DEBUG is defined */
237 #define pr_devel(fmt, ...) \
238 printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
240 #define pr_devel(fmt, ...) \
241 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
244 #include <linux/dynamic_debug.h>
246 /* If you are writing a driver, please use dev_dbg instead */
247 #if defined(CONFIG_DYNAMIC_DEBUG)
248 /* dynamic_pr_debug() uses pr_fmt() internally so we don't need it here */
249 #define pr_debug(fmt, ...) \
250 dynamic_pr_debug(fmt, ##__VA_ARGS__)
252 #define pr_debug(fmt, ...) \
253 printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
255 #define pr_debug(fmt, ...) \
256 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
260 * Print a one-time message (analogous to WARN_ONCE() et al):
264 #define printk_once(fmt, ...) \
266 static bool __print_once __read_mostly; \
268 if (!__print_once) { \
269 __print_once = true; \
270 printk(fmt, ##__VA_ARGS__); \
274 #define printk_once(fmt, ...) \
275 no_printk(fmt, ##__VA_ARGS__)
278 #define pr_emerg_once(fmt, ...) \
279 printk_once(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
280 #define pr_alert_once(fmt, ...) \
281 printk_once(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
282 #define pr_crit_once(fmt, ...) \
283 printk_once(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
284 #define pr_err_once(fmt, ...) \
285 printk_once(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
286 #define pr_warn_once(fmt, ...) \
287 printk_once(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
288 #define pr_notice_once(fmt, ...) \
289 printk_once(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
290 #define pr_info_once(fmt, ...) \
291 printk_once(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
292 #define pr_cont_once(fmt, ...) \
293 printk_once(KERN_CONT pr_fmt(fmt), ##__VA_ARGS__)
296 #define pr_devel_once(fmt, ...) \
297 printk_once(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
299 #define pr_devel_once(fmt, ...) \
300 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
303 /* If you are writing a driver, please use dev_dbg instead */
305 #define pr_debug_once(fmt, ...) \
306 printk_once(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
308 #define pr_debug_once(fmt, ...) \
309 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
313 * ratelimited messages with local ratelimit_state,
314 * no local ratelimit_state used in the !PRINTK case
317 #define printk_ratelimited(fmt, ...) \
319 static DEFINE_RATELIMIT_STATE(_rs, \
320 DEFAULT_RATELIMIT_INTERVAL, \
321 DEFAULT_RATELIMIT_BURST); \
323 if (__ratelimit(&_rs)) \
324 printk(fmt, ##__VA_ARGS__); \
327 #define printk_ratelimited(fmt, ...) \
328 no_printk(fmt, ##__VA_ARGS__)
331 #define pr_emerg_ratelimited(fmt, ...) \
332 printk_ratelimited(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
333 #define pr_alert_ratelimited(fmt, ...) \
334 printk_ratelimited(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
335 #define pr_crit_ratelimited(fmt, ...) \
336 printk_ratelimited(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
337 #define pr_err_ratelimited(fmt, ...) \
338 printk_ratelimited(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
339 #define pr_warn_ratelimited(fmt, ...) \
340 printk_ratelimited(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
341 #define pr_notice_ratelimited(fmt, ...) \
342 printk_ratelimited(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
343 #define pr_info_ratelimited(fmt, ...) \
344 printk_ratelimited(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
345 /* no pr_cont_ratelimited, don't do that... */
348 #define pr_devel_ratelimited(fmt, ...) \
349 printk_ratelimited(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
351 #define pr_devel_ratelimited(fmt, ...) \
352 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
355 /* If you are writing a driver, please use dev_dbg instead */
356 #if defined(CONFIG_DYNAMIC_DEBUG)
357 /* descriptor check is first to prevent flooding with "callbacks suppressed" */
358 #define pr_debug_ratelimited(fmt, ...) \
360 static DEFINE_RATELIMIT_STATE(_rs, \
361 DEFAULT_RATELIMIT_INTERVAL, \
362 DEFAULT_RATELIMIT_BURST); \
363 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
364 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT) && \
366 __dynamic_pr_debug(&descriptor, fmt, ##__VA_ARGS__); \
369 #define pr_debug_ratelimited(fmt, ...) \
370 printk_ratelimited(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
372 #define pr_debug_ratelimited(fmt, ...) \
373 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
376 extern const struct file_operations kmsg_fops;
383 extern void hex_dump_to_buffer(const void *buf, size_t len,
384 int rowsize, int groupsize,
385 char *linebuf, size_t linebuflen, bool ascii);
387 extern void print_hex_dump(const char *level, const char *prefix_str,
388 int prefix_type, int rowsize, int groupsize,
389 const void *buf, size_t len, bool ascii);
390 #if defined(CONFIG_DYNAMIC_DEBUG)
391 #define print_hex_dump_bytes(prefix_str, prefix_type, buf, len) \
392 dynamic_hex_dump(prefix_str, prefix_type, 16, 1, buf, len, true)
394 extern void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
395 const void *buf, size_t len);
396 #endif /* defined(CONFIG_DYNAMIC_DEBUG) */
398 static inline void print_hex_dump(const char *level, const char *prefix_str,
399 int prefix_type, int rowsize, int groupsize,
400 const void *buf, size_t len, bool ascii)
403 static inline void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
404 const void *buf, size_t len)
410 #if defined(CONFIG_DYNAMIC_DEBUG)
411 #define print_hex_dump_debug(prefix_str, prefix_type, rowsize, \
412 groupsize, buf, len, ascii) \
413 dynamic_hex_dump(prefix_str, prefix_type, rowsize, \
414 groupsize, buf, len, ascii)
416 #define print_hex_dump_debug(prefix_str, prefix_type, rowsize, \
417 groupsize, buf, len, ascii) \
418 print_hex_dump(KERN_DEBUG, prefix_str, prefix_type, rowsize, \
419 groupsize, buf, len, ascii)
420 #endif /* defined(CONFIG_DYNAMIC_DEBUG) */