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42 * This file provides a log API to RTE applications.
53 /** The rte_log structure. */
55 uint32_t type; /**< Bitfield with enabled logs. */
56 uint32_t level; /**< Log level. */
57 FILE *file; /**< Pointer to current FILE* for logs. */
60 /** Global log informations */
61 extern struct rte_logs rte_logs;
64 #define RTE_LOGTYPE_EAL 0x00000001 /**< Log related to eal. */
65 #define RTE_LOGTYPE_MALLOC 0x00000002 /**< Log related to malloc. */
66 #define RTE_LOGTYPE_RING 0x00000004 /**< Log related to ring. */
67 #define RTE_LOGTYPE_MEMPOOL 0x00000008 /**< Log related to mempool. */
68 #define RTE_LOGTYPE_TIMER 0x00000010 /**< Log related to timers. */
69 #define RTE_LOGTYPE_PMD 0x00000020 /**< Log related to poll mode driver. */
70 #define RTE_LOGTYPE_HASH 0x00000040 /**< Log related to hash table. */
71 #define RTE_LOGTYPE_LPM 0x00000080 /**< Log related to LPM. */
72 #define RTE_LOGTYPE_KNI 0x00000100 /**< Log related to KNI. */
73 #define RTE_LOGTYPE_ACL 0x00000200 /**< Log related to ACL. */
74 #define RTE_LOGTYPE_POWER 0x00000400 /**< Log related to power. */
75 #define RTE_LOGTYPE_METER 0x00000800 /**< Log related to QoS meter. */
76 #define RTE_LOGTYPE_SCHED 0x00001000 /**< Log related to QoS port scheduler. */
77 #define RTE_LOGTYPE_PORT 0x00002000 /**< Log related to port. */
78 #define RTE_LOGTYPE_TABLE 0x00004000 /**< Log related to table. */
79 #define RTE_LOGTYPE_PIPELINE 0x00008000 /**< Log related to pipeline. */
80 #define RTE_LOGTYPE_MBUF 0x00010000 /**< Log related to mbuf. */
82 /* these log types can be used in an application */
83 #define RTE_LOGTYPE_USER1 0x01000000 /**< User-defined log type 1. */
84 #define RTE_LOGTYPE_USER2 0x02000000 /**< User-defined log type 2. */
85 #define RTE_LOGTYPE_USER3 0x04000000 /**< User-defined log type 3. */
86 #define RTE_LOGTYPE_USER4 0x08000000 /**< User-defined log type 4. */
87 #define RTE_LOGTYPE_USER5 0x10000000 /**< User-defined log type 5. */
88 #define RTE_LOGTYPE_USER6 0x20000000 /**< User-defined log type 6. */
89 #define RTE_LOGTYPE_USER7 0x40000000 /**< User-defined log type 7. */
90 #define RTE_LOGTYPE_USER8 0x80000000 /**< User-defined log type 8. */
92 /* Can't use 0, as it gives compiler warnings */
93 #define RTE_LOG_EMERG 1U /**< System is unusable. */
94 #define RTE_LOG_ALERT 2U /**< Action must be taken immediately. */
95 #define RTE_LOG_CRIT 3U /**< Critical conditions. */
96 #define RTE_LOG_ERR 4U /**< Error conditions. */
97 #define RTE_LOG_WARNING 5U /**< Warning conditions. */
98 #define RTE_LOG_NOTICE 6U /**< Normal but significant condition. */
99 #define RTE_LOG_INFO 7U /**< Informational. */
100 #define RTE_LOG_DEBUG 8U /**< Debug-level messages. */
102 /** The default log stream. */
103 extern FILE *eal_default_log_stream;
106 * Change the stream that will be used by the logging system.
108 * This can be done at any time. The f argument represents the stream
109 * to be used to send the logs. If f is NULL, the default output is
113 * Pointer to the stream.
116 * - Negative on error.
118 int rte_openlog_stream(FILE *f);
121 * Set the global log level.
123 * After this call, all logs that are lower or equal than level and
124 * lower or equal than the RTE_LOG_LEVEL configuration option will be
128 * Log level. A value between RTE_LOG_EMERG (1) and RTE_LOG_DEBUG (8).
130 void rte_set_log_level(uint32_t level);
133 * Get the global log level.
135 uint32_t rte_get_log_level(void);
138 * Enable or disable the log type.
141 * Log type, for example, RTE_LOGTYPE_EAL.
143 * True for enable; false for disable.
145 void rte_set_log_type(uint32_t type, int enable);
148 * Get the global log type.
150 uint32_t rte_get_log_type(void);
153 * Get the current loglevel for the message being processed.
155 * Before calling the user-defined stream for logging, the log
156 * subsystem sets a per-lcore variable containing the loglevel and the
157 * logtype of the message being processed. This information can be
158 * accessed by the user-defined log output function through this
162 * The loglevel of the message being processed.
164 int rte_log_cur_msg_loglevel(void);
167 * Get the current logtype for the message being processed.
169 * Before calling the user-defined stream for logging, the log
170 * subsystem sets a per-lcore variable containing the loglevel and the
171 * logtype of the message being processed. This information can be
172 * accessed by the user-defined log output function through this
176 * The logtype of the message being processed.
178 int rte_log_cur_msg_logtype(void);
181 * Enable or disable the history (enabled by default)
184 * true to enable, or 0 to disable history.
186 void rte_log_set_history(int enable);
189 * Dump the log history to a file
192 * A pointer to a file for output
194 void rte_log_dump_history(FILE *f);
197 * Add a log message to the history.
199 * This function can be called from a user-defined log stream. It adds
200 * the given message in the history that can be dumped using
201 * rte_log_dump_history().
204 * A data buffer containing the message to be saved in the history.
206 * The length of the data buffer.
209 * - (-ENOBUFS) if there is no room to store the message.
211 int rte_log_add_in_history(const char *buf, size_t size);
214 * Generates a log message.
216 * The message will be sent in the stream defined by the previous call
217 * to rte_openlog_stream().
219 * The level argument determines if the log should be displayed or
220 * not, depending on the global rte_logs variable.
222 * The preferred alternative is the RTE_LOG() function because debug logs may
223 * be removed at compilation time if optimization is enabled. Moreover,
224 * logs are automatically prefixed by type when using the macro.
227 * Log level. A value between RTE_LOG_EMERG (1) and RTE_LOG_DEBUG (8).
229 * The log type, for example, RTE_LOGTYPE_EAL.
231 * The format string, as in printf(3), followed by the variable arguments
232 * required by the format.
235 * - Negative on error.
237 int rte_log(uint32_t level, uint32_t logtype, const char *format, ...)
239 #if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ > 2))
240 __attribute__((cold))
243 __attribute__((format(printf, 3, 4)));
246 * Generates a log message.
248 * The message will be sent in the stream defined by the previous call
249 * to rte_openlog_stream().
251 * The level argument determines if the log should be displayed or
252 * not, depending on the global rte_logs variable. A trailing
253 * newline may be added if needed.
255 * The preferred alternative is the RTE_LOG() because debug logs may be
256 * removed at compilation time.
259 * Log level. A value between RTE_LOG_EMERG (1) and RTE_LOG_DEBUG (8).
261 * The log type, for example, RTE_LOGTYPE_EAL.
263 * The format string, as in printf(3), followed by the variable arguments
264 * required by the format.
266 * The va_list of the variable arguments required by the format.
269 * - Negative on error.
271 int rte_vlog(uint32_t level, uint32_t logtype, const char *format, va_list ap)
272 __attribute__((format(printf,3,0)));
275 * Generates a log message.
277 * The RTE_LOG() is equivalent to rte_log() with two differences:
279 * - RTE_LOG() can be used to remove debug logs at compilation time,
280 * depending on RTE_LOG_LEVEL configuration option, and compilation
281 * optimization level. If optimization is enabled, the tests
282 * involving constants only are pre-computed. If compilation is done
283 * with -O0, these tests will be done at run time.
284 * - The log level and log type names are smaller, for example:
285 * RTE_LOG(INFO, EAL, "this is a %s", "log");
288 * Log level. A value between EMERG (1) and DEBUG (8). The short name is
289 * expanded by the macro, so it cannot be an integer value.
291 * The log type, for example, EAL. The short name is expanded by the
292 * macro, so it cannot be an integer value.
294 * The fmt string, as in printf(3), followed by the variable arguments
295 * required by the format.
298 * - Negative on error.
300 #define RTE_LOG(l, t, ...) \
301 (void)((RTE_LOG_ ## l <= RTE_LOG_LEVEL) ? \
302 rte_log(RTE_LOG_ ## l, \
303 RTE_LOGTYPE_ ## t, # t ": " __VA_ARGS__) : \
310 #endif /* _RTE_LOG_H_ */