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rte_log.h(3) DPDK rte_log.h(3)

NAME

rte_log.h

SYNOPSIS

#include <stdint.h>
#include <stdio.h>
#include <stdarg.h>
#include <stdbool.h>
#include <rte_common.h>
#include <rte_config.h>

Macros


#define RTE_LOGTYPE_EAL 0
#define RTE_LOGTYPE_MALLOC 1
#define RTE_LOGTYPE_RING 2
#define RTE_LOGTYPE_MEMPOOL 3
#define RTE_LOGTYPE_TIMER 4
#define RTE_LOGTYPE_PMD 5
#define RTE_LOGTYPE_HASH 6
#define RTE_LOGTYPE_LPM 7
#define RTE_LOGTYPE_ACL 9
#define RTE_LOGTYPE_POWER 10
#define RTE_LOGTYPE_METER 11
#define RTE_LOGTYPE_SCHED 12
#define RTE_LOGTYPE_PORT 13
#define RTE_LOGTYPE_TABLE 14
#define RTE_LOGTYPE_PIPELINE 15
#define RTE_LOGTYPE_MBUF 16
#define RTE_LOGTYPE_CRYPTODEV 17
#define RTE_LOGTYPE_EFD 18
#define RTE_LOGTYPE_EVENTDEV 19
#define RTE_LOGTYPE_GSO 20
#define RTE_LOGTYPE_USER1 24
#define RTE_LOGTYPE_USER2 25
#define RTE_LOGTYPE_USER3 26
#define RTE_LOGTYPE_USER4 27
#define RTE_LOGTYPE_USER5 28
#define RTE_LOGTYPE_USER6 29
#define RTE_LOGTYPE_USER7 30
#define RTE_LOGTYPE_USER8 31
#define RTE_LOGTYPE_FIRST_EXT_ID 32
#define RTE_LOG_EMERG 1U
#define RTE_LOG_ALERT 2U
#define RTE_LOG_CRIT 3U
#define RTE_LOG_ERR 4U
#define RTE_LOG_WARNING 5U
#define RTE_LOG_NOTICE 6U
#define RTE_LOG_INFO 7U
#define RTE_LOG_DEBUG 8U
#define RTE_LOG_MAX RTE_LOG_DEBUG
#define RTE_LOG(l, t, ...)
#define RTE_LOG_DP(l, t, ...)
#define RTE_LOG_REGISTER(type, name, level) RTE_LOG_REGISTER_IMPL(type, RTE_STR(name), level)
#define RTE_LOG_REGISTER_DEFAULT(type, level) RTE_LOG_REGISTER_IMPL(type, RTE_STR(RTE_LOG_DEFAULT_LOGTYPE), level)
#define RTE_LOG_REGISTER_SUFFIX(type, suffix, level)

Functions


int rte_openlog_stream (FILE *f)
FILE * rte_log_get_stream (void)
void rte_log_set_global_level (uint32_t level)
uint32_t rte_log_get_global_level (void)
int rte_log_get_level (uint32_t logtype)
bool rte_log_can_log (uint32_t logtype, uint32_t loglevel)
int rte_log_set_level_pattern (const char *pattern, uint32_t level)
int rte_log_set_level_regexp (const char *regex, uint32_t level)
int rte_log_set_level (uint32_t logtype, uint32_t level)
int rte_log_cur_msg_loglevel (void)
int rte_log_cur_msg_logtype (void)
int rte_log_register (const char *name)
int rte_log_register_type_and_pick_level (const char *name, uint32_t level_def)
void rte_log_list_types (FILE *out, const char *prefix)
void rte_log_dump (FILE *f)
int rte_log (uint32_t level, uint32_t logtype, const char *format,...) __rte_cold __rte_format_printf(3
int int rte_vlog (uint32_t level, uint32_t logtype, const char *format, va_list ap) __rte_format_printf(3

Detailed Description

RTE Logs API

This file provides a log API to RTE applications.

Definition in file rte_log.h.

Macro Definition Documentation

#define RTE_LOGTYPE_EAL 0

Log related to eal.

Definition at line 29 of file rte_log.h.

#define RTE_LOGTYPE_MALLOC 1

Log related to malloc.

Definition at line 30 of file rte_log.h.

#define RTE_LOGTYPE_RING 2

Log related to ring.

Definition at line 31 of file rte_log.h.

#define RTE_LOGTYPE_MEMPOOL 3

Log related to mempool.

Definition at line 32 of file rte_log.h.

#define RTE_LOGTYPE_TIMER 4

Log related to timers.

Definition at line 33 of file rte_log.h.

#define RTE_LOGTYPE_PMD 5

Log related to poll mode driver.

Definition at line 34 of file rte_log.h.

#define RTE_LOGTYPE_HASH 6

Log related to hash table.

Definition at line 35 of file rte_log.h.

#define RTE_LOGTYPE_LPM 7

Log related to LPM.

Definition at line 36 of file rte_log.h.

#define RTE_LOGTYPE_ACL 9

Log related to ACL.

Definition at line 38 of file rte_log.h.

#define RTE_LOGTYPE_POWER 10

Log related to power.

Definition at line 39 of file rte_log.h.

#define RTE_LOGTYPE_METER 11

Log related to QoS meter.

Definition at line 40 of file rte_log.h.

#define RTE_LOGTYPE_SCHED 12

Log related to QoS port scheduler.

Definition at line 41 of file rte_log.h.

#define RTE_LOGTYPE_PORT 13

Log related to port.

Definition at line 42 of file rte_log.h.

#define RTE_LOGTYPE_TABLE 14

Log related to table.

Definition at line 43 of file rte_log.h.

#define RTE_LOGTYPE_PIPELINE 15

Log related to pipeline.

Definition at line 44 of file rte_log.h.

#define RTE_LOGTYPE_MBUF 16

Log related to mbuf.

Definition at line 45 of file rte_log.h.

#define RTE_LOGTYPE_CRYPTODEV 17

Log related to cryptodev.

Definition at line 46 of file rte_log.h.

#define RTE_LOGTYPE_EFD 18

Log related to EFD.

Definition at line 47 of file rte_log.h.

#define RTE_LOGTYPE_EVENTDEV 19

Log related to eventdev.

Definition at line 48 of file rte_log.h.

#define RTE_LOGTYPE_GSO 20

Log related to GSO.

Definition at line 49 of file rte_log.h.

#define RTE_LOGTYPE_USER1 24

User-defined log type 1.

Definition at line 52 of file rte_log.h.

#define RTE_LOGTYPE_USER2 25

User-defined log type 2.

Definition at line 53 of file rte_log.h.

#define RTE_LOGTYPE_USER3 26

User-defined log type 3.

Definition at line 54 of file rte_log.h.

#define RTE_LOGTYPE_USER4 27

User-defined log type 4.

Definition at line 55 of file rte_log.h.

#define RTE_LOGTYPE_USER5 28

User-defined log type 5.

Definition at line 56 of file rte_log.h.

#define RTE_LOGTYPE_USER6 29

User-defined log type 6.

Definition at line 57 of file rte_log.h.

#define RTE_LOGTYPE_USER7 30

User-defined log type 7.

Definition at line 58 of file rte_log.h.

#define RTE_LOGTYPE_USER8 31

User-defined log type 8.

Definition at line 59 of file rte_log.h.

#define RTE_LOGTYPE_FIRST_EXT_ID 32

First identifier for extended logs

Definition at line 62 of file rte_log.h.

#define RTE_LOG_EMERG 1U

System is unusable.

Definition at line 65 of file rte_log.h.

#define RTE_LOG_ALERT 2U

Action must be taken immediately.

Definition at line 66 of file rte_log.h.

#define RTE_LOG_CRIT 3U

Critical conditions.

Definition at line 67 of file rte_log.h.

#define RTE_LOG_ERR 4U

Error conditions.

Definition at line 68 of file rte_log.h.

#define RTE_LOG_WARNING 5U

Warning conditions.

Definition at line 69 of file rte_log.h.

#define RTE_LOG_NOTICE 6U

Normal but significant condition.

Definition at line 70 of file rte_log.h.

#define RTE_LOG_INFO 7U

Informational.

Definition at line 71 of file rte_log.h.

#define RTE_LOG_DEBUG 8U

Debug-level messages.

Definition at line 72 of file rte_log.h.

#define RTE_LOG_MAX RTE_LOG_DEBUG

Most detailed log level.

Definition at line 73 of file rte_log.h.

#define RTE_LOG(l, t, ...)

Value:

rte_log(RTE_LOG_ ## l,                          RTE_LOGTYPE_ ## t, # t ": " __VA_ARGS__)
Generates a log message.

The RTE_LOG() is a helper that prefixes the string with the log level and type, and call rte_log().

Parameters:

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.
t The log type, for example, EAL. The short name is expanded by the macro, so it cannot be an integer value.
... The fmt string, as in printf(3), followed by the variable arguments required by the format.

Returns:

  • 0: Success.
  • Negative on error.

Definition at line 331 of file rte_log.h.

#define RTE_LOG_DP(l, t, ...)

Value:

(void)((RTE_LOG_ ## l <= RTE_LOG_DP_LEVEL) ?           rte_log(RTE_LOG_ ## l,                          RTE_LOGTYPE_ ## t, # t ": " __VA_ARGS__) :      0)
Generates a log message for data path.

Similar to RTE_LOG(), except that it is removed at compilation time if the RTE_LOG_DP_LEVEL configuration option is lower than the log level argument.

Parameters:

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.
t The log type, for example, EAL. The short name is expanded by the macro, so it cannot be an integer value.
... The fmt string, as in printf(3), followed by the variable arguments required by the format.

Returns:

  • 0: Success.
  • Negative on error.

Definition at line 355 of file rte_log.h.

#define RTE_LOG_REGISTER(type, name, level) RTE_LOG_REGISTER_IMPL(type, RTE_STR(name), level)

Register a dynamic log type in constructor context with its name and level.

It is a wrapper macro for declaring the logtype, register the log and sets it's level in the constructor context.

Parameters:

type The log type identifier
name Name for the log type to be registered
level Log level. A value between EMERG (1) and DEBUG (8).

Definition at line 383 of file rte_log.h.

#define RTE_LOG_REGISTER_DEFAULT(type, level) RTE_LOG_REGISTER_IMPL(type, RTE_STR(RTE_LOG_DEFAULT_LOGTYPE), level)

This is an equivalent to RTE_LOG_REGISTER, but relying on the build system to select the right format for the logtype.

Definition at line 390 of file rte_log.h.

#define RTE_LOG_REGISTER_SUFFIX(type, suffix, level)

Value:

RTE_LOG_REGISTER_IMPL(type,                                  RTE_STR(RTE_LOG_DEFAULT_LOGTYPE) "." RTE_STR(suffix), level)
This is an equivalent to RTE_LOG_REGISTER, but relying on the build system to select the right prefix for the logtype.

Definition at line 397 of file rte_log.h.

Function Documentation

int rte_openlog_stream (FILE * f)

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).

Parameters:

f Pointer to the stream.

Returns:

  • 0 on success.
  • Negative on error.

FILE* rte_log_get_stream (void)

Retrieve the stream used by the logging system (see rte_openlog_stream() to change it).

Returns:

Pointer to the stream.

void rte_log_set_global_level (uint32_t level)

Set the global log level.

After this call, logs with a level lower or equal than the level passed as argument will be displayed.

Parameters:

level Log level. A value between RTE_LOG_EMERG (1) and RTE_LOG_DEBUG (8).

uint32_t rte_log_get_global_level (void)

Get the global log level.

Returns:

The current global log level.

int rte_log_get_level (uint32_t logtype)

Get the log level for a given type.

Parameters:

logtype The log type identifier.

Returns:

0 on success, a negative value if logtype is invalid.

bool rte_log_can_log (uint32_t logtype, uint32_t loglevel)

For a given logtype, check if a log with loglevel can be printed.

Parameters:

logtype The log type identifier
loglevel Log level. A value between RTE_LOG_EMERG (1) and RTE_LOG_DEBUG (8).

Returns:

Returns 'true' if log can be printed and 'false' if it can't.

int rte_log_set_level_pattern (const char * pattern, uint32_t level)

Set the log level for a given type based on globbing pattern.

Parameters:

pattern The globbing pattern identifying the log type.
level The level to be set.

Returns:

0 on success, a negative value if level is invalid.

int rte_log_set_level_regexp (const char * regex, uint32_t level)

Set the log level for a given type based on regular expression.

Parameters:

regex The regular expression identifying the log type.
level The level to be set.

Returns:

0 on success, a negative value if level is invalid.

int rte_log_set_level (uint32_t logtype, uint32_t level)

Set the log level for a given type.

Parameters:

logtype The log type identifier.
level The level to be set.

Returns:

0 on success, a negative value if logtype or level is invalid.

int rte_log_cur_msg_loglevel (void)

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.

Returns:

The loglevel of the message being processed.

int rte_log_cur_msg_logtype (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.

Returns:

The logtype of the message being processed.

int rte_log_register (const char * name)

Register a dynamic log type

If a log is already registered with the same type, the returned value is the same than the previous one.

Parameters:

name The string identifying the log type.

Returns:

  • >0: success, the returned value is the log type identifier.
  • (-ENOMEM): cannot allocate memory.

int rte_log_register_type_and_pick_level (const char * name, uint32_t level_def)

Register a dynamic log type and try to pick its level from EAL options

rte_log_register() is called inside. If successful, the function tries to search for matching regexp in the list of EAL log level options and pick the level from the last matching entry. If nothing can be applied from the list, the level will be set to the user-defined default value.

Parameters:

name Name for the log type to be registered
level_def Fallback level to be set if the global list has no matching options

Returns:

  • >=0: the newly registered log type
  • <0: rte_log_register() error value

void rte_log_list_types (FILE * out, const char * prefix)

Dump name of each logtype, one per line.

Parameters:

out Stream where the list is sent.
prefix String preceding each logtype in the output.

void rte_log_dump (FILE * f)

Dump log information.

Dump the global level and the registered log types.

Parameters:

f The output stream where the dump should be sent.

int rte_log (uint32_t level, uint32_t logtype, const char * format, ...)

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 loglevel settings.

The preferred alternative is the RTE_LOG() because it adds the level and type in the logged string.

Parameters:

level Log level. A value between RTE_LOG_EMERG (1) and RTE_LOG_DEBUG (8).
logtype The log type, for example, RTE_LOGTYPE_EAL.
format The format string, as in printf(3), followed by the variable arguments required by the format.

Returns:

  • 0: Success.
  • Negative on error.

int int rte_vlog (uint32_t level, uint32_t logtype, const char * format, va_list ap)

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 loglevel settings. A trailing newline may be added if needed.

The preferred alternative is the RTE_LOG() because it adds the level and type in the logged string.

Parameters:

level Log level. A value between RTE_LOG_EMERG (1) and RTE_LOG_DEBUG (8).
logtype The log type, for example, RTE_LOGTYPE_EAL.
format The format string, as in printf(3), followed by the variable arguments required by the format.
ap The va_list of the variable arguments required by the format.

Returns:

  • 0: Success.
  • Negative on error.

Author

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Thu May 23 2024 Version 23.11.0