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/*-
* BSD LICENSE
*
* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _RTE_LOG_H_
#define _RTE_LOG_H_
/**
* @file
*
* RTE Logs API
*
* This file provides a log API to RTE applications.
*/
#ifdef __cplusplus
extern "C" {
#endif
#include <stdint.h>
#include <stdio.h>
#include <stdarg.h>
/** The rte_log structure. */
struct rte_logs {
uint32_t type; /**< Bitfield with enabled logs. */
uint32_t level; /**< Log level. */
FILE *file; /**< Pointer to current FILE* for logs. */
};
/** Global log informations */
extern struct rte_logs rte_logs;
/* SDK log type */
#define RTE_LOGTYPE_EAL 0x00000001 /**< Log related to eal. */
#define RTE_LOGTYPE_MALLOC 0x00000002 /**< Log related to malloc. */
#define RTE_LOGTYPE_RING 0x00000004 /**< Log related to ring. */
#define RTE_LOGTYPE_MEMPOOL 0x00000008 /**< Log related to mempool. */
#define RTE_LOGTYPE_TIMER 0x00000010 /**< Log related to timers. */
#define RTE_LOGTYPE_PMD 0x00000020 /**< Log related to poll mode driver. */
#define RTE_LOGTYPE_HASH 0x00000040 /**< Log related to hash table. */
#define RTE_LOGTYPE_LPM 0x00000080 /**< Log related to LPM. */
#define RTE_LOGTYPE_KNI 0x00000100 /**< Log related to KNI. */
#define RTE_LOGTYPE_ACL 0x00000200 /**< Log related to ACL. */
#define RTE_LOGTYPE_POWER 0x00000400 /**< Log related to power. */
#define RTE_LOGTYPE_METER 0x00000800 /**< Log related to QoS meter. */
#define RTE_LOGTYPE_SCHED 0x00001000 /**< Log related to QoS port scheduler. */
#define RTE_LOGTYPE_PORT 0x00002000 /**< Log related to port. */
#define RTE_LOGTYPE_TABLE 0x00004000 /**< Log related to table. */
#define RTE_LOGTYPE_PIPELINE 0x00008000 /**< Log related to pipeline. */
/* these log types can be used in an application */
#define RTE_LOGTYPE_USER1 0x01000000 /**< User-defined log type 1. */
#define RTE_LOGTYPE_USER2 0x02000000 /**< User-defined log type 2. */
#define RTE_LOGTYPE_USER3 0x04000000 /**< User-defined log type 3. */
#define RTE_LOGTYPE_USER4 0x08000000 /**< User-defined log type 4. */
#define RTE_LOGTYPE_USER5 0x10000000 /**< User-defined log type 5. */
#define RTE_LOGTYPE_USER6 0x20000000 /**< User-defined log type 6. */
#define RTE_LOGTYPE_USER7 0x40000000 /**< User-defined log type 7. */
#define RTE_LOGTYPE_USER8 0x80000000 /**< User-defined log type 8. */
/* Can't use 0, as it gives compiler warnings */
#define RTE_LOG_EMERG 1U /**< System is unusable. */
#define RTE_LOG_ALERT 2U /**< Action must be taken immediately. */
#define RTE_LOG_CRIT 3U /**< Critical conditions. */
#define RTE_LOG_ERR 4U /**< Error conditions. */
#define RTE_LOG_WARNING 5U /**< Warning conditions. */
#define RTE_LOG_NOTICE 6U /**< Normal but significant condition. */
#define RTE_LOG_INFO 7U /**< Informational. */
#define RTE_LOG_DEBUG 8U /**< Debug-level messages. */
/** The default log stream. */
extern FILE *eal_default_log_stream;
/**
* Change the stream that will be used by the logging system.
*
* This can be done at any time. The f argument represents the stream
* to be used to send the logs. If f is NULL, the default output is
* used (stderr).
*
* @param f
* Pointer to the stream.
* @return
* - 0 on success.
* - Negative on error.
*/
int rte_openlog_stream(FILE *f);
/**
* Set the global log level.
*
* After this call, all logs that are lower or equal than level and
* lower or equal than the RTE_LOG_LEVEL configuration option will be
* displayed.
*
* @param level
* Log level. A value between RTE_LOG_EMERG (1) and RTE_LOG_DEBUG (8).
*/
void rte_set_log_level(uint32_t level);
/**
* Get the global log level.
*/
uint32_t rte_get_log_level(void);
/**
* Enable or disable the log type.
*
* @param type
* Log type, for example, RTE_LOGTYPE_EAL.
* @param enable
* True for enable; false for disable.
*/
void rte_set_log_type(uint32_t type, int enable);
/**
* Get the current loglevel for the message being processed.
*
* Before calling the user-defined stream for logging, the log
* subsystem sets a per-lcore variable containing the loglevel and the
* logtype of the message being processed. This information can be
* accessed by the user-defined log output function through this
* function.
*
* @return
* The loglevel of the message being processed.
*/
int rte_log_cur_msg_loglevel(void);
/**
* Get the current logtype for the message being processed.
*
* Before calling the user-defined stream for logging, the log
* subsystem sets a per-lcore variable containing the loglevel and the
* logtype of the message being processed. This information can be
* accessed by the user-defined log output function through this
* function.
*
* @return
* The logtype of the message being processed.
*/
int rte_log_cur_msg_logtype(void);
/**
* Enable or disable the history (enabled by default)
*
* @param enable
* true to enable, or 0 to disable history.
*/
void rte_log_set_history(int enable);
/**
* Dump the log history to a file
*
* @param f
* A pointer to a file for output
*/
void rte_log_dump_history(FILE *f);
/**
* Add a log message to the history.
*
* This function can be called from a user-defined log stream. It adds
* the given message in the history that can be dumped using
* rte_log_dump_history().
*
* @param buf
* A data buffer containing the message to be saved in the history.
* @param size
* The length of the data buffer.
* @return
* - 0: Success.
* - (-ENOBUFS) if there is no room to store the message.
*/
int rte_log_add_in_history(const char *buf, size_t size);
/**
* Generates a log message.
*
* The message will be sent in the stream defined by the previous call
* to rte_openlog_stream().
*
* The level argument determines if the log should be displayed or
* not, depending on the global rte_logs variable.
*
* The preferred alternative is the RTE_LOG() function because debug logs may
* be removed at compilation time if optimization is enabled. Moreover,
* logs are automatically prefixed by type when using the macro.
*
* @param level
* Log level. A value between RTE_LOG_EMERG (1) and RTE_LOG_DEBUG (8).
* @param logtype
* The log type, for example, RTE_LOGTYPE_EAL.
* @param format
* The format string, as in printf(3), followed by the variable arguments
* required by the format.
* @return
* - 0: Success.
* - Negative on error.
*/
int rte_log(uint32_t level, uint32_t logtype, const char *format, ...)
#ifdef __GNUC__
#if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ > 2))
__attribute__((cold))
#endif
#endif
__attribute__((format(printf, 3, 4)));
/**
* Generates a log message.
*
* The message will be sent in the stream defined by the previous call
* to rte_openlog_stream().
*
* The level argument determines if the log should be displayed or
* not, depending on the global rte_logs variable. A trailing
* newline may be added if needed.
*
* The preferred alternative is the RTE_LOG() because debug logs may be
* removed at compilation time.
*
* @param level
* Log level. A value between RTE_LOG_EMERG (1) and RTE_LOG_DEBUG (8).
* @param logtype
* The log type, for example, RTE_LOGTYPE_EAL.
* @param format
* The format string, as in printf(3), followed by the variable arguments
* required by the format.
* @param ap
* The va_list of the variable arguments required by the format.
* @return
* - 0: Success.
* - Negative on error.
*/
int rte_vlog(uint32_t level, uint32_t logtype, const char *format, va_list ap)
__attribute__((format(printf,3,0)));
/**
* Generates a log message.
*
* The RTE_LOG() is equivalent to rte_log() with two differences:
* - RTE_LOG() can be used to remove debug logs at compilation time,
* depending on RTE_LOG_LEVEL configuration option, and compilation
* optimization level. If optimization is enabled, the tests
* involving constants only are pre-computed. If compilation is done
* with -O0, these tests will be done at run time.
* - The log level and log type names are smaller, for example:
* RTE_LOG(INFO, EAL, "this is a %s", "log");
*
* @param l
* Log level. A value between EMERG (1) and DEBUG (8). The short name is
* expanded by the macro, so it cannot be an integer value.
* @param t
* The log type, for example, EAL. The short name is expanded by the
* macro, so it cannot be an integer value.
* @param fmt
* The fmt string, as in printf(3), followed by the variable arguments
* required by the format.
* @param args
* The variable list of arguments according to the format string.
* @return
* - 0: Success.
* - Negative on error.
*/
#define RTE_LOG(l, t, ...) \
(void)(((RTE_LOG_ ## l <= RTE_LOG_LEVEL) && \
(RTE_LOG_ ## l <= rte_logs.level) && \
(RTE_LOGTYPE_ ## t & rte_logs.type)) ? \
rte_log(RTE_LOG_ ## l, \
RTE_LOGTYPE_ ## t, # t ": " __VA_ARGS__) : \
0)
#ifdef __cplusplus
}
#endif
#endif /* _RTE_LOG_H_ */
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