1 #ifndef __KERNEL_PRINTK__
2 #define __KERNEL_PRINTK__
4 #include <linux/init.h>
6 extern const char linux_banner[];
7 extern const char linux_proc_banner[];
9 #define KERN_EMERG "<0>" /* system is unusable */
10 #define KERN_ALERT "<1>" /* action must be taken immediately */
11 #define KERN_CRIT "<2>" /* critical conditions */
12 #define KERN_ERR "<3>" /* error conditions */
13 #define KERN_WARNING "<4>" /* warning conditions */
14 #define KERN_NOTICE "<5>" /* normal but significant condition */
15 #define KERN_INFO "<6>" /* informational */
16 #define KERN_DEBUG "<7>" /* debug-level messages */
18 /* Use the default kernel loglevel */
19 #define KERN_DEFAULT "<d>"
21 * Annotation for a "continued" line of log printout (only done after a
22 * line that had no enclosing \n). Only to be used by core/arch code
23 * during early bootup (a continued line is not SMP-safe otherwise).
25 #define KERN_CONT "<c>"
27 extern int console_printk[];
29 #define console_loglevel (console_printk[0])
30 #define default_message_loglevel (console_printk[1])
31 #define minimum_console_loglevel (console_printk[2])
32 #define default_console_loglevel (console_printk[3])
34 static inline void console_silent(void)
39 static inline void console_verbose(void)
42 console_loglevel = 15;
52 * Add this to a message where you are sure the firmware is buggy or behaves
53 * really stupid or out of spec. Be aware that the responsible BIOS developer
54 * should be able to fix this issue or at least get a concrete idea of the
55 * problem by reading your message without the need of looking at the kernel
58 * Use it for definite and high priority BIOS bugs.
61 * Use it for not that clear (e.g. could the kernel messed up things already?)
62 * and medium priority BIOS bugs.
65 * Use this one if you want to tell the user or vendor about something
66 * suspicious, but generally harmless related to the firmware.
68 * Use it for information or very low priority BIOS bugs.
70 #define FW_BUG "[Firmware Bug]: "
71 #define FW_WARN "[Firmware Warn]: "
72 #define FW_INFO "[Firmware Info]: "
76 * Add this to a message for hardware errors, so that user can report
77 * it to hardware vendor instead of LKML or software vendor.
79 #define HW_ERR "[Hardware Error]: "
82 * Dummy printk for disabled debugging statements to use whilst maintaining
83 * gcc's format and side-effect checking.
85 static inline __printf(1, 2)
86 int no_printk(const char *fmt, ...)
91 extern asmlinkage __printf(1, 2)
92 void early_printk(const char *fmt, ...);
94 extern int printk_needs_cpu(int cpu);
95 extern void printk_tick(void);
98 asmlinkage __printf(5, 0)
99 int vprintk_emit(int facility, int level,
100 const char *dict, size_t dictlen,
101 const char *fmt, va_list args);
103 asmlinkage __printf(1, 0)
104 int vprintk(const char *fmt, va_list args);
106 asmlinkage __printf(5, 6) __cold
107 asmlinkage int printk_emit(int facility, int level,
108 const char *dict, size_t dictlen,
109 const char *fmt, ...);
111 asmlinkage __printf(1, 2) __cold
112 int printk(const char *fmt, ...);
115 * Special printk facility for scheduler use only, _DO_NOT_USE_ !
117 __printf(1, 2) __cold int printk_sched(const char *fmt, ...);
120 * Please don't use printk_ratelimit(), because it shares ratelimiting state
121 * with all other unrelated printk_ratelimit() callsites. Instead use
122 * printk_ratelimited() or plain old __ratelimit().
124 extern int __printk_ratelimit(const char *func);
125 #define printk_ratelimit() __printk_ratelimit(__func__)
126 extern bool printk_timed_ratelimit(unsigned long *caller_jiffies,
127 unsigned int interval_msec);
129 extern int printk_delay_msec;
130 extern int dmesg_restrict;
131 extern int kptr_restrict;
133 void log_buf_kexec_setup(void);
134 void __init setup_log_buf(int early);
136 static inline __printf(1, 0)
137 int vprintk(const char *s, va_list args)
141 static inline __printf(1, 2) __cold
142 int printk(const char *s, ...)
146 static inline __printf(1, 2) __cold
147 int printk_sched(const char *s, ...)
151 static inline int printk_ratelimit(void)
155 static inline bool printk_timed_ratelimit(unsigned long *caller_jiffies,
156 unsigned int interval_msec)
161 static inline void log_buf_kexec_setup(void)
165 static inline void setup_log_buf(int early)
170 extern void dump_stack(void) __cold;
173 #define pr_fmt(fmt) fmt
176 #define pr_emerg(fmt, ...) \
177 printk(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
178 #define pr_alert(fmt, ...) \
179 printk(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
180 #define pr_crit(fmt, ...) \
181 printk(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
182 #define pr_err(fmt, ...) \
183 printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
184 #define pr_warning(fmt, ...) \
185 printk(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
186 #define pr_warn pr_warning
187 #define pr_notice(fmt, ...) \
188 printk(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
189 #define pr_info(fmt, ...) \
190 printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
191 #define pr_cont(fmt, ...) \
192 printk(KERN_CONT fmt, ##__VA_ARGS__)
194 /* pr_devel() should produce zero code unless DEBUG is defined */
196 #define pr_devel(fmt, ...) \
197 printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
199 #define pr_devel(fmt, ...) \
200 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
203 /* If you are writing a driver, please use dev_dbg instead */
204 #if defined(CONFIG_DYNAMIC_DEBUG)
205 /* dynamic_pr_debug() uses pr_fmt() internally so we don't need it here */
206 #define pr_debug(fmt, ...) \
207 dynamic_pr_debug(fmt, ##__VA_ARGS__)
209 #define pr_debug(fmt, ...) \
210 printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
212 #define pr_debug(fmt, ...) \
213 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
217 * Print a one-time message (analogous to WARN_ONCE() et al):
221 #define printk_once(fmt, ...) \
223 static bool __print_once; \
225 if (!__print_once) { \
226 __print_once = true; \
227 printk(fmt, ##__VA_ARGS__); \
231 #define printk_once(fmt, ...) \
232 no_printk(fmt, ##__VA_ARGS__)
235 #define pr_emerg_once(fmt, ...) \
236 printk_once(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
237 #define pr_alert_once(fmt, ...) \
238 printk_once(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
239 #define pr_crit_once(fmt, ...) \
240 printk_once(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
241 #define pr_err_once(fmt, ...) \
242 printk_once(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
243 #define pr_warn_once(fmt, ...) \
244 printk_once(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
245 #define pr_notice_once(fmt, ...) \
246 printk_once(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
247 #define pr_info_once(fmt, ...) \
248 printk_once(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
249 #define pr_cont_once(fmt, ...) \
250 printk_once(KERN_CONT pr_fmt(fmt), ##__VA_ARGS__)
251 /* If you are writing a driver, please use dev_dbg instead */
253 #define pr_debug_once(fmt, ...) \
254 printk_once(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
256 #define pr_debug_once(fmt, ...) \
257 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
261 * ratelimited messages with local ratelimit_state,
262 * no local ratelimit_state used in the !PRINTK case
265 #define printk_ratelimited(fmt, ...) \
267 static DEFINE_RATELIMIT_STATE(_rs, \
268 DEFAULT_RATELIMIT_INTERVAL, \
269 DEFAULT_RATELIMIT_BURST); \
271 if (__ratelimit(&_rs)) \
272 printk(fmt, ##__VA_ARGS__); \
275 #define printk_ratelimited(fmt, ...) \
276 no_printk(fmt, ##__VA_ARGS__)
279 #define pr_emerg_ratelimited(fmt, ...) \
280 printk_ratelimited(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
281 #define pr_alert_ratelimited(fmt, ...) \
282 printk_ratelimited(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
283 #define pr_crit_ratelimited(fmt, ...) \
284 printk_ratelimited(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
285 #define pr_err_ratelimited(fmt, ...) \
286 printk_ratelimited(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
287 #define pr_warn_ratelimited(fmt, ...) \
288 printk_ratelimited(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
289 #define pr_notice_ratelimited(fmt, ...) \
290 printk_ratelimited(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
291 #define pr_info_ratelimited(fmt, ...) \
292 printk_ratelimited(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
293 /* no pr_cont_ratelimited, don't do that... */
294 /* If you are writing a driver, please use dev_dbg instead */
296 #define pr_debug_ratelimited(fmt, ...) \
297 printk_ratelimited(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
299 #define pr_debug_ratelimited(fmt, ...) \
300 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
303 extern const struct file_operations kmsg_fops;
310 extern void hex_dump_to_buffer(const void *buf, size_t len,
311 int rowsize, int groupsize,
312 char *linebuf, size_t linebuflen, bool ascii);
314 extern void print_hex_dump(const char *level, const char *prefix_str,
315 int prefix_type, int rowsize, int groupsize,
316 const void *buf, size_t len, bool ascii);
317 extern void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
318 const void *buf, size_t len);
320 static inline void print_hex_dump(const char *level, const char *prefix_str,
321 int prefix_type, int rowsize, int groupsize,
322 const void *buf, size_t len, bool ascii)
325 static inline void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
326 const void *buf, size_t len)