1 #ifndef __KERNEL_PRINTK__
2 #define __KERNEL_PRINTK__
4 #include <linux/init.h>
5 #include <linux/kern_levels.h>
7 extern const char linux_banner[];
8 extern const char linux_proc_banner[];
10 static inline int printk_get_level(const char *buffer)
12 if (buffer[0] == KERN_SOH_ASCII && buffer[1]) {
15 case 'd': /* KERN_DEFAULT */
22 static inline const char *printk_skip_level(const char *buffer)
24 if (printk_get_level(buffer)) {
27 case 'd': /* KERN_DEFAULT */
34 extern int console_printk[];
36 #define console_loglevel (console_printk[0])
37 #define default_message_loglevel (console_printk[1])
38 #define minimum_console_loglevel (console_printk[2])
39 #define default_console_loglevel (console_printk[3])
41 static inline void console_silent(void)
46 static inline void console_verbose(void)
49 console_loglevel = 15;
59 * Add this to a message where you are sure the firmware is buggy or behaves
60 * really stupid or out of spec. Be aware that the responsible BIOS developer
61 * should be able to fix this issue or at least get a concrete idea of the
62 * problem by reading your message without the need of looking at the kernel
65 * Use it for definite and high priority BIOS bugs.
68 * Use it for not that clear (e.g. could the kernel messed up things already?)
69 * and medium priority BIOS bugs.
72 * Use this one if you want to tell the user or vendor about something
73 * suspicious, but generally harmless related to the firmware.
75 * Use it for information or very low priority BIOS bugs.
77 #define FW_BUG "[Firmware Bug]: "
78 #define FW_WARN "[Firmware Warn]: "
79 #define FW_INFO "[Firmware Info]: "
83 * Add this to a message for hardware errors, so that user can report
84 * it to hardware vendor instead of LKML or software vendor.
86 #define HW_ERR "[Hardware Error]: "
89 * Dummy printk for disabled debugging statements to use whilst maintaining
90 * gcc's format and side-effect checking.
92 static inline __printf(1, 2)
93 int no_printk(const char *fmt, ...)
98 extern asmlinkage __printf(1, 2)
99 void early_printk(const char *fmt, ...);
101 extern int printk_needs_cpu(int cpu);
102 extern void printk_tick(void);
105 asmlinkage __printf(5, 0)
106 int vprintk_emit(int facility, int level,
107 const char *dict, size_t dictlen,
108 const char *fmt, va_list args);
110 asmlinkage __printf(1, 0)
111 int vprintk(const char *fmt, va_list args);
113 asmlinkage __printf(5, 6) __cold
114 asmlinkage int printk_emit(int facility, int level,
115 const char *dict, size_t dictlen,
116 const char *fmt, ...);
118 asmlinkage __printf(1, 2) __cold
119 int printk(const char *fmt, ...);
122 * Special printk facility for scheduler use only, _DO_NOT_USE_ !
124 __printf(1, 2) __cold int printk_sched(const char *fmt, ...);
127 * Please don't use printk_ratelimit(), because it shares ratelimiting state
128 * with all other unrelated printk_ratelimit() callsites. Instead use
129 * printk_ratelimited() or plain old __ratelimit().
131 extern int __printk_ratelimit(const char *func);
132 #define printk_ratelimit() __printk_ratelimit(__func__)
133 extern bool printk_timed_ratelimit(unsigned long *caller_jiffies,
134 unsigned int interval_msec);
136 extern int printk_delay_msec;
137 extern int dmesg_restrict;
138 extern int kptr_restrict;
140 void log_buf_kexec_setup(void);
141 void __init setup_log_buf(int early);
143 static inline __printf(1, 0)
144 int vprintk(const char *s, va_list args)
148 static inline __printf(1, 2) __cold
149 int printk(const char *s, ...)
153 static inline __printf(1, 2) __cold
154 int printk_sched(const char *s, ...)
158 static inline int printk_ratelimit(void)
162 static inline bool printk_timed_ratelimit(unsigned long *caller_jiffies,
163 unsigned int interval_msec)
168 static inline void log_buf_kexec_setup(void)
172 static inline void setup_log_buf(int early)
177 extern void dump_stack(void) __cold;
180 #define pr_fmt(fmt) fmt
183 #define pr_emerg(fmt, ...) \
184 printk(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
185 #define pr_alert(fmt, ...) \
186 printk(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
187 #define pr_crit(fmt, ...) \
188 printk(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
189 #define pr_err(fmt, ...) \
190 printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
191 #define pr_warning(fmt, ...) \
192 printk(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
193 #define pr_warn pr_warning
194 #define pr_notice(fmt, ...) \
195 printk(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
196 #define pr_info(fmt, ...) \
197 printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
198 #define pr_cont(fmt, ...) \
199 printk(KERN_CONT fmt, ##__VA_ARGS__)
201 /* pr_devel() should produce zero code unless DEBUG is defined */
203 #define pr_devel(fmt, ...) \
204 printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
206 #define pr_devel(fmt, ...) \
207 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
210 /* If you are writing a driver, please use dev_dbg instead */
211 #if defined(CONFIG_DYNAMIC_DEBUG)
212 /* dynamic_pr_debug() uses pr_fmt() internally so we don't need it here */
213 #define pr_debug(fmt, ...) \
214 dynamic_pr_debug(fmt, ##__VA_ARGS__)
216 #define pr_debug(fmt, ...) \
217 printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
219 #define pr_debug(fmt, ...) \
220 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
224 * Print a one-time message (analogous to WARN_ONCE() et al):
228 #define printk_once(fmt, ...) \
230 static bool __print_once; \
232 if (!__print_once) { \
233 __print_once = true; \
234 printk(fmt, ##__VA_ARGS__); \
238 #define printk_once(fmt, ...) \
239 no_printk(fmt, ##__VA_ARGS__)
242 #define pr_emerg_once(fmt, ...) \
243 printk_once(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
244 #define pr_alert_once(fmt, ...) \
245 printk_once(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
246 #define pr_crit_once(fmt, ...) \
247 printk_once(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
248 #define pr_err_once(fmt, ...) \
249 printk_once(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
250 #define pr_warn_once(fmt, ...) \
251 printk_once(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
252 #define pr_notice_once(fmt, ...) \
253 printk_once(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
254 #define pr_info_once(fmt, ...) \
255 printk_once(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
256 #define pr_cont_once(fmt, ...) \
257 printk_once(KERN_CONT pr_fmt(fmt), ##__VA_ARGS__)
258 /* If you are writing a driver, please use dev_dbg instead */
260 #define pr_debug_once(fmt, ...) \
261 printk_once(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
263 #define pr_debug_once(fmt, ...) \
264 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
268 * ratelimited messages with local ratelimit_state,
269 * no local ratelimit_state used in the !PRINTK case
272 #define printk_ratelimited(fmt, ...) \
274 static DEFINE_RATELIMIT_STATE(_rs, \
275 DEFAULT_RATELIMIT_INTERVAL, \
276 DEFAULT_RATELIMIT_BURST); \
278 if (__ratelimit(&_rs)) \
279 printk(fmt, ##__VA_ARGS__); \
282 #define printk_ratelimited(fmt, ...) \
283 no_printk(fmt, ##__VA_ARGS__)
286 #define pr_emerg_ratelimited(fmt, ...) \
287 printk_ratelimited(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
288 #define pr_alert_ratelimited(fmt, ...) \
289 printk_ratelimited(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
290 #define pr_crit_ratelimited(fmt, ...) \
291 printk_ratelimited(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
292 #define pr_err_ratelimited(fmt, ...) \
293 printk_ratelimited(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
294 #define pr_warn_ratelimited(fmt, ...) \
295 printk_ratelimited(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
296 #define pr_notice_ratelimited(fmt, ...) \
297 printk_ratelimited(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
298 #define pr_info_ratelimited(fmt, ...) \
299 printk_ratelimited(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
300 /* no pr_cont_ratelimited, don't do that... */
301 /* If you are writing a driver, please use dev_dbg instead */
303 #define pr_debug_ratelimited(fmt, ...) \
304 printk_ratelimited(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
306 #define pr_debug_ratelimited(fmt, ...) \
307 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
310 extern const struct file_operations kmsg_fops;
317 extern void hex_dump_to_buffer(const void *buf, size_t len,
318 int rowsize, int groupsize,
319 char *linebuf, size_t linebuflen, bool ascii);
321 extern void print_hex_dump(const char *level, const char *prefix_str,
322 int prefix_type, int rowsize, int groupsize,
323 const void *buf, size_t len, bool ascii);
324 extern void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
325 const void *buf, size_t len);
327 static inline void print_hex_dump(const char *level, const char *prefix_str,
328 int prefix_type, int rowsize, int groupsize,
329 const void *buf, size_t len, bool ascii)
332 static inline void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
333 const void *buf, size_t len)