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42 * This file provides a log API to RTE applications.
53 #include <rte_common.h>
54 #include <rte_config.h>
56 struct rte_log_dynamic_type;
58 /** The rte_log structure. */
60 uint32_t type; /**< Bitfield with enabled logs. */
61 uint32_t level; /**< Log level. */
62 FILE *file; /**< Output file set by rte_openlog_stream, or NULL. */
63 size_t dynamic_types_len;
64 struct rte_log_dynamic_type *dynamic_types;
67 /** Global log informations */
68 extern struct rte_logs rte_logs;
71 #define RTE_LOGTYPE_EAL 0 /**< Log related to eal. */
72 #define RTE_LOGTYPE_MALLOC 1 /**< Log related to malloc. */
73 #define RTE_LOGTYPE_RING 2 /**< Log related to ring. */
74 #define RTE_LOGTYPE_MEMPOOL 3 /**< Log related to mempool. */
75 #define RTE_LOGTYPE_TIMER 4 /**< Log related to timers. */
76 #define RTE_LOGTYPE_PMD 5 /**< Log related to poll mode driver. */
77 #define RTE_LOGTYPE_HASH 6 /**< Log related to hash table. */
78 #define RTE_LOGTYPE_LPM 7 /**< Log related to LPM. */
79 #define RTE_LOGTYPE_KNI 8 /**< Log related to KNI. */
80 #define RTE_LOGTYPE_ACL 9 /**< Log related to ACL. */
81 #define RTE_LOGTYPE_POWER 10 /**< Log related to power. */
82 #define RTE_LOGTYPE_METER 11 /**< Log related to QoS meter. */
83 #define RTE_LOGTYPE_SCHED 12 /**< Log related to QoS port scheduler. */
84 #define RTE_LOGTYPE_PORT 13 /**< Log related to port. */
85 #define RTE_LOGTYPE_TABLE 14 /**< Log related to table. */
86 #define RTE_LOGTYPE_PIPELINE 15 /**< Log related to pipeline. */
87 #define RTE_LOGTYPE_MBUF 16 /**< Log related to mbuf. */
88 #define RTE_LOGTYPE_CRYPTODEV 17 /**< Log related to cryptodev. */
89 #define RTE_LOGTYPE_EFD 18 /**< Log related to EFD. */
90 #define RTE_LOGTYPE_EVENTDEV 19 /**< Log related to eventdev. */
91 #define RTE_LOGTYPE_GSO 20 /**< Log related to GSO. */
93 /* these log types can be used in an application */
94 #define RTE_LOGTYPE_USER1 24 /**< User-defined log type 1. */
95 #define RTE_LOGTYPE_USER2 25 /**< User-defined log type 2. */
96 #define RTE_LOGTYPE_USER3 26 /**< User-defined log type 3. */
97 #define RTE_LOGTYPE_USER4 27 /**< User-defined log type 4. */
98 #define RTE_LOGTYPE_USER5 28 /**< User-defined log type 5. */
99 #define RTE_LOGTYPE_USER6 29 /**< User-defined log type 6. */
100 #define RTE_LOGTYPE_USER7 30 /**< User-defined log type 7. */
101 #define RTE_LOGTYPE_USER8 31 /**< User-defined log type 8. */
103 /** First identifier for extended logs */
104 #define RTE_LOGTYPE_FIRST_EXT_ID 32
106 /* Can't use 0, as it gives compiler warnings */
107 #define RTE_LOG_EMERG 1U /**< System is unusable. */
108 #define RTE_LOG_ALERT 2U /**< Action must be taken immediately. */
109 #define RTE_LOG_CRIT 3U /**< Critical conditions. */
110 #define RTE_LOG_ERR 4U /**< Error conditions. */
111 #define RTE_LOG_WARNING 5U /**< Warning conditions. */
112 #define RTE_LOG_NOTICE 6U /**< Normal but significant condition. */
113 #define RTE_LOG_INFO 7U /**< Informational. */
114 #define RTE_LOG_DEBUG 8U /**< Debug-level messages. */
117 * Change the stream that will be used by the logging system.
119 * This can be done at any time. The f argument represents the stream
120 * to be used to send the logs. If f is NULL, the default output is
124 * Pointer to the stream.
127 * - Negative on error.
129 int rte_openlog_stream(FILE *f);
132 * Set the global log level.
134 * After this call, logs with a level lower or equal than the level
135 * passed as argument will be displayed.
138 * Log level. A value between RTE_LOG_EMERG (1) and RTE_LOG_DEBUG (8).
140 void rte_log_set_global_level(uint32_t level);
143 * Get the global log level.
146 * The current global log level.
148 uint32_t rte_log_get_global_level(void);
151 * Get the log level for a given type.
154 * The log type identifier.
156 * 0 on success, a negative value if logtype is invalid.
158 int rte_log_get_level(uint32_t logtype);
161 * Set the log level for a given type.
164 * The regexp identifying the log type.
166 * The level to be set.
168 * 0 on success, a negative value if level is invalid.
170 int rte_log_set_level_regexp(const char *pattern, uint32_t level);
173 * Set the log level for a given type.
176 * The log type identifier.
178 * The level to be set.
180 * 0 on success, a negative value if logtype or level is invalid.
182 int rte_log_set_level(uint32_t logtype, uint32_t level);
185 * Get the current loglevel for the message being processed.
187 * Before calling the user-defined stream for logging, the log
188 * subsystem sets a per-lcore variable containing the loglevel and the
189 * logtype of the message being processed. This information can be
190 * accessed by the user-defined log output function through this
194 * The loglevel of the message being processed.
196 int rte_log_cur_msg_loglevel(void);
199 * Get the current logtype for the message being processed.
201 * Before calling the user-defined stream for logging, the log
202 * subsystem sets a per-lcore variable containing the loglevel and the
203 * logtype of the message being processed. This information can be
204 * accessed by the user-defined log output function through this
208 * The logtype of the message being processed.
210 int rte_log_cur_msg_logtype(void);
213 * Register a dynamic log type
215 * If a log is already registered with the same type, the returned value
216 * is the same than the previous one.
219 * The string identifying the log type.
221 * - >0: success, the returned value is the log type identifier.
222 * - (-ENOMEM): cannot allocate memory.
224 int rte_log_register(const char *name);
227 * Dump log information.
229 * Dump the global level and the registered log types.
232 * The output stream where the dump should be sent.
234 void rte_log_dump(FILE *f);
237 * Generates a log message.
239 * The message will be sent in the stream defined by the previous call
240 * to rte_openlog_stream().
242 * The level argument determines if the log should be displayed or
243 * not, depending on the global rte_logs variable.
245 * The preferred alternative is the RTE_LOG() because it adds the
246 * level and type in the logged string.
249 * Log level. A value between RTE_LOG_EMERG (1) and RTE_LOG_DEBUG (8).
251 * The log type, for example, RTE_LOGTYPE_EAL.
253 * The format string, as in printf(3), followed by the variable arguments
254 * required by the format.
257 * - Negative on error.
259 int rte_log(uint32_t level, uint32_t logtype, const char *format, ...)
261 #if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ > 2))
262 __attribute__((cold))
265 __attribute__((format(printf, 3, 4)));
268 * Generates a log message.
270 * The message will be sent in the stream defined by the previous call
271 * to rte_openlog_stream().
273 * The level argument determines if the log should be displayed or
274 * not, depending on the global rte_logs variable. A trailing
275 * newline may be added if needed.
277 * The preferred alternative is the RTE_LOG() because it adds the
278 * level and type in the logged string.
281 * Log level. A value between RTE_LOG_EMERG (1) and RTE_LOG_DEBUG (8).
283 * The log type, for example, RTE_LOGTYPE_EAL.
285 * The format string, as in printf(3), followed by the variable arguments
286 * required by the format.
288 * The va_list of the variable arguments required by the format.
291 * - Negative on error.
293 int rte_vlog(uint32_t level, uint32_t logtype, const char *format, va_list ap)
294 __attribute__((format(printf,3,0)));
297 * Generates a log message.
299 * The RTE_LOG() is a helper that prefixes the string with the log level
300 * and type, and call rte_log().
303 * Log level. A value between EMERG (1) and DEBUG (8). The short name is
304 * expanded by the macro, so it cannot be an integer value.
306 * The log type, for example, EAL. The short name is expanded by the
307 * macro, so it cannot be an integer value.
309 * The fmt string, as in printf(3), followed by the variable arguments
310 * required by the format.
313 * - Negative on error.
315 #define RTE_LOG(l, t, ...) \
316 rte_log(RTE_LOG_ ## l, \
317 RTE_LOGTYPE_ ## t, # t ": " __VA_ARGS__)
320 * Generates a log message for data path.
322 * Similar to RTE_LOG(), except that it is removed at compilation time
323 * if the RTE_LOG_DP_LEVEL configuration option is lower than the log
327 * Log level. A value between EMERG (1) and DEBUG (8). The short name is
328 * expanded by the macro, so it cannot be an integer value.
330 * The log type, for example, EAL. The short name is expanded by the
331 * macro, so it cannot be an integer value.
333 * The fmt string, as in printf(3), followed by the variable arguments
334 * required by the format.
337 * - Negative on error.
339 #define RTE_LOG_DP(l, t, ...) \
340 (void)((RTE_LOG_ ## l <= RTE_LOG_DP_LEVEL) ? \
341 rte_log(RTE_LOG_ ## l, \
342 RTE_LOGTYPE_ ## t, # t ": " __VA_ARGS__) : \
349 #endif /* _RTE_LOG_H_ */