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968ab183 LT |
1 | #ifndef __KERNEL_PRINTK__ |
2 | #define __KERNEL_PRINTK__ | |
3 | ||
4 | extern const char linux_banner[]; | |
5 | extern const char linux_proc_banner[]; | |
6 | ||
7 | #define KERN_EMERG "<0>" /* system is unusable */ | |
8 | #define KERN_ALERT "<1>" /* action must be taken immediately */ | |
9 | #define KERN_CRIT "<2>" /* critical conditions */ | |
10 | #define KERN_ERR "<3>" /* error conditions */ | |
11 | #define KERN_WARNING "<4>" /* warning conditions */ | |
12 | #define KERN_NOTICE "<5>" /* normal but significant condition */ | |
13 | #define KERN_INFO "<6>" /* informational */ | |
14 | #define KERN_DEBUG "<7>" /* debug-level messages */ | |
15 | ||
16 | /* Use the default kernel loglevel */ | |
17 | #define KERN_DEFAULT "<d>" | |
18 | /* | |
19 | * Annotation for a "continued" line of log printout (only done after a | |
20 | * line that had no enclosing \n). Only to be used by core/arch code | |
21 | * during early bootup (a continued line is not SMP-safe otherwise). | |
22 | */ | |
23 | #define KERN_CONT "<c>" | |
24 | ||
25 | extern int console_printk[]; | |
26 | ||
27 | #define console_loglevel (console_printk[0]) | |
28 | #define default_message_loglevel (console_printk[1]) | |
29 | #define minimum_console_loglevel (console_printk[2]) | |
30 | #define default_console_loglevel (console_printk[3]) | |
31 | ||
32 | struct va_format { | |
33 | const char *fmt; | |
34 | va_list *va; | |
35 | }; | |
36 | ||
37 | /* | |
38 | * FW_BUG | |
39 | * Add this to a message where you are sure the firmware is buggy or behaves | |
40 | * really stupid or out of spec. Be aware that the responsible BIOS developer | |
41 | * should be able to fix this issue or at least get a concrete idea of the | |
42 | * problem by reading your message without the need of looking at the kernel | |
43 | * code. | |
44 | * | |
45 | * Use it for definite and high priority BIOS bugs. | |
46 | * | |
47 | * FW_WARN | |
48 | * Use it for not that clear (e.g. could the kernel messed up things already?) | |
49 | * and medium priority BIOS bugs. | |
50 | * | |
51 | * FW_INFO | |
52 | * Use this one if you want to tell the user or vendor about something | |
53 | * suspicious, but generally harmless related to the firmware. | |
54 | * | |
55 | * Use it for information or very low priority BIOS bugs. | |
56 | */ | |
57 | #define FW_BUG "[Firmware Bug]: " | |
58 | #define FW_WARN "[Firmware Warn]: " | |
59 | #define FW_INFO "[Firmware Info]: " | |
60 | ||
61 | /* | |
62 | * HW_ERR | |
63 | * Add this to a message for hardware errors, so that user can report | |
64 | * it to hardware vendor instead of LKML or software vendor. | |
65 | */ | |
66 | #define HW_ERR "[Hardware Error]: " | |
67 | ||
68 | #ifdef CONFIG_PRINTK | |
69 | asmlinkage int vprintk(const char *fmt, va_list args) | |
70 | __attribute__ ((format (printf, 1, 0))); | |
71 | asmlinkage int printk(const char * fmt, ...) | |
72 | __attribute__ ((format (printf, 1, 2))) __cold; | |
73 | ||
74 | /* | |
75 | * Please don't use printk_ratelimit(), because it shares ratelimiting state | |
76 | * with all other unrelated printk_ratelimit() callsites. Instead use | |
77 | * printk_ratelimited() or plain old __ratelimit(). | |
78 | */ | |
79 | extern int __printk_ratelimit(const char *func); | |
80 | #define printk_ratelimit() __printk_ratelimit(__func__) | |
81 | extern bool printk_timed_ratelimit(unsigned long *caller_jiffies, | |
82 | unsigned int interval_msec); | |
83 | ||
84 | extern int printk_delay_msec; | |
85 | extern int dmesg_restrict; | |
86 | ||
87 | /* | |
88 | * Print a one-time message (analogous to WARN_ONCE() et al): | |
89 | */ | |
90 | #define printk_once(x...) ({ \ | |
91 | static bool __print_once; \ | |
92 | \ | |
93 | if (!__print_once) { \ | |
94 | __print_once = true; \ | |
95 | printk(x); \ | |
96 | } \ | |
97 | }) | |
98 | ||
99 | void log_buf_kexec_setup(void); | |
100 | #else | |
101 | static inline int vprintk(const char *s, va_list args) | |
102 | __attribute__ ((format (printf, 1, 0))); | |
103 | static inline int vprintk(const char *s, va_list args) { return 0; } | |
104 | static inline int printk(const char *s, ...) | |
105 | __attribute__ ((format (printf, 1, 2))); | |
106 | static inline int __cold printk(const char *s, ...) { return 0; } | |
107 | static inline int printk_ratelimit(void) { return 0; } | |
108 | static inline bool printk_timed_ratelimit(unsigned long *caller_jiffies, \ | |
109 | unsigned int interval_msec) \ | |
110 | { return false; } | |
111 | ||
112 | /* No effect, but we still get type checking even in the !PRINTK case: */ | |
113 | #define printk_once(x...) printk(x) | |
114 | ||
115 | static inline void log_buf_kexec_setup(void) | |
116 | { | |
117 | } | |
118 | #endif | |
119 | ||
120 | /* | |
121 | * Dummy printk for disabled debugging statements to use whilst maintaining | |
122 | * gcc's format and side-effect checking. | |
123 | */ | |
124 | static inline __attribute__ ((format (printf, 1, 2))) | |
125 | int no_printk(const char *s, ...) { return 0; } | |
126 | ||
127 | extern int printk_needs_cpu(int cpu); | |
128 | extern void printk_tick(void); | |
129 | ||
130 | extern void asmlinkage __attribute__((format(printf, 1, 2))) | |
131 | early_printk(const char *fmt, ...); | |
132 | ||
133 | static inline void console_silent(void) | |
134 | { | |
135 | console_loglevel = 0; | |
136 | } | |
137 | ||
138 | static inline void console_verbose(void) | |
139 | { | |
140 | if (console_loglevel) | |
141 | console_loglevel = 15; | |
142 | } | |
143 | ||
144 | extern void dump_stack(void) __cold; | |
145 | ||
146 | enum { | |
147 | DUMP_PREFIX_NONE, | |
148 | DUMP_PREFIX_ADDRESS, | |
149 | DUMP_PREFIX_OFFSET | |
150 | }; | |
151 | extern void hex_dump_to_buffer(const void *buf, size_t len, | |
152 | int rowsize, int groupsize, | |
153 | char *linebuf, size_t linebuflen, bool ascii); | |
154 | extern void print_hex_dump(const char *level, const char *prefix_str, | |
155 | int prefix_type, int rowsize, int groupsize, | |
156 | const void *buf, size_t len, bool ascii); | |
157 | extern void print_hex_dump_bytes(const char *prefix_str, int prefix_type, | |
158 | const void *buf, size_t len); | |
159 | ||
160 | #ifndef pr_fmt | |
161 | #define pr_fmt(fmt) fmt | |
162 | #endif | |
163 | ||
164 | #define pr_emerg(fmt, ...) \ | |
165 | printk(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__) | |
166 | #define pr_alert(fmt, ...) \ | |
167 | printk(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__) | |
168 | #define pr_crit(fmt, ...) \ | |
169 | printk(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__) | |
170 | #define pr_err(fmt, ...) \ | |
171 | printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__) | |
172 | #define pr_warning(fmt, ...) \ | |
173 | printk(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__) | |
174 | #define pr_warn pr_warning | |
175 | #define pr_notice(fmt, ...) \ | |
176 | printk(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__) | |
177 | #define pr_info(fmt, ...) \ | |
178 | printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__) | |
179 | #define pr_cont(fmt, ...) \ | |
180 | printk(KERN_CONT fmt, ##__VA_ARGS__) | |
181 | ||
182 | /* pr_devel() should produce zero code unless DEBUG is defined */ | |
183 | #ifdef DEBUG | |
184 | #define pr_devel(fmt, ...) \ | |
185 | printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) | |
186 | #else | |
187 | #define pr_devel(fmt, ...) \ | |
188 | ({ if (0) printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); 0; }) | |
189 | #endif | |
190 | ||
191 | /* If you are writing a driver, please use dev_dbg instead */ | |
192 | #if defined(DEBUG) | |
193 | #define pr_debug(fmt, ...) \ | |
194 | printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) | |
195 | #elif defined(CONFIG_DYNAMIC_DEBUG) | |
196 | /* dynamic_pr_debug() uses pr_fmt() internally so we don't need it here */ | |
197 | #define pr_debug(fmt, ...) \ | |
198 | dynamic_pr_debug(fmt, ##__VA_ARGS__) | |
199 | #else | |
200 | #define pr_debug(fmt, ...) \ | |
201 | ({ if (0) printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); 0; }) | |
202 | #endif | |
203 | ||
204 | /* | |
205 | * ratelimited messages with local ratelimit_state, | |
206 | * no local ratelimit_state used in the !PRINTK case | |
207 | */ | |
208 | #ifdef CONFIG_PRINTK | |
209 | #define printk_ratelimited(fmt, ...) ({ \ | |
210 | static DEFINE_RATELIMIT_STATE(_rs, \ | |
211 | DEFAULT_RATELIMIT_INTERVAL, \ | |
212 | DEFAULT_RATELIMIT_BURST); \ | |
213 | \ | |
214 | if (__ratelimit(&_rs)) \ | |
215 | printk(fmt, ##__VA_ARGS__); \ | |
216 | }) | |
217 | #else | |
218 | /* No effect, but we still get type checking even in the !PRINTK case: */ | |
219 | #define printk_ratelimited printk | |
220 | #endif | |
221 | ||
222 | #define pr_emerg_ratelimited(fmt, ...) \ | |
223 | printk_ratelimited(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__) | |
224 | #define pr_alert_ratelimited(fmt, ...) \ | |
225 | printk_ratelimited(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__) | |
226 | #define pr_crit_ratelimited(fmt, ...) \ | |
227 | printk_ratelimited(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__) | |
228 | #define pr_err_ratelimited(fmt, ...) \ | |
229 | printk_ratelimited(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__) | |
230 | #define pr_warning_ratelimited(fmt, ...) \ | |
231 | printk_ratelimited(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__) | |
232 | #define pr_warn_ratelimited pr_warning_ratelimited | |
233 | #define pr_notice_ratelimited(fmt, ...) \ | |
234 | printk_ratelimited(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__) | |
235 | #define pr_info_ratelimited(fmt, ...) \ | |
236 | printk_ratelimited(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__) | |
237 | /* no pr_cont_ratelimited, don't do that... */ | |
238 | /* If you are writing a driver, please use dev_dbg instead */ | |
239 | #if defined(DEBUG) | |
240 | #define pr_debug_ratelimited(fmt, ...) \ | |
241 | printk_ratelimited(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) | |
242 | #else | |
243 | #define pr_debug_ratelimited(fmt, ...) \ | |
244 | ({ if (0) printk_ratelimited(KERN_DEBUG pr_fmt(fmt), \ | |
245 | ##__VA_ARGS__); 0; }) | |
246 | #endif | |
247 | ||
248 | #endif |