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Add MXS_ALERT

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As errors and warnings are throttled, there is a need for being able
to log severe errors without ever having them throttled (e.g. when
logging the stack in conjunction with a crash).

MXS_ALERT should only be used in a context where the process is known
to be going down, either via crash or explicit exit.
This commit is contained in:
Johan Wikman 2016-09-30 10:25:34 +03:00
parent 087338910e
commit 93b755fc33
2 changed files with 13 additions and 17 deletions
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2
server/core/log_manager.cc
View File

@ -548,7 +548,7 @@ static bool logmanager_init_nomutex(const char* ident,
/**
* Set global variable
*/
mxs_log_enabled_priorities = MXS_LOG_ERR | MXS_LOG_NOTICE | MXS_LOG_WARNING;
mxs_log_enabled_priorities = (1 << LOG_ERR) | (1 << LOG_NOTICE) | (1 << LOG_WARNING);
/**
* Initialize filewriter data and open the log file

28
server/include/log_manager.h
View File

@ -54,21 +54,6 @@ extern "C" {
#define MXS_MODULE_NAME NULL
#endif
enum mxs_log_priorities
{
MXS_LOG_EMERG = (1 << LOG_EMERG),
MXS_LOG_ALERT = (1 << LOG_ALERT),
MXS_LOG_CRIT = (1 << LOG_CRIT),
MXS_LOG_ERR = (1 << LOG_ERR),
MXS_LOG_WARNING = (1 << LOG_WARNING),
MXS_LOG_NOTICE = (1 << LOG_NOTICE),
MXS_LOG_INFO = (1 << LOG_INFO),
MXS_LOG_DEBUG = (1 << LOG_DEBUG),
MXS_LOG_MASK = (MXS_LOG_EMERG | MXS_LOG_ALERT | MXS_LOG_CRIT | MXS_LOG_ERR |
MXS_LOG_WARNING | MXS_LOG_NOTICE | MXS_LOG_INFO | MXS_LOG_DEBUG),
};
typedef enum
{
MXS_LOG_TARGET_DEFAULT = 0,
@ -93,6 +78,8 @@ extern __thread mxs_log_info_t mxs_log_tls;
/**
* Check if specified log type is enabled in general or if it is enabled
* for the current session.
*
* @param priority One of the syslog LOG_ERR, LOG_WARNING, etc. constants.
*/
#define MXS_LOG_PRIORITY_IS_ENABLED(priority) \
(((mxs_log_enabled_priorities & (1 << priority)) || \
@ -149,11 +136,20 @@ int mxs_log_message(int priority,
mxs_log_message(priority, MXS_MODULE_NAME, __FILE__, __LINE__, __func__, format, ##__VA_ARGS__)
/**
* Log an error, warning, notice, info, or debug message.
* Log an alert, error, warning, notice, info, or debug message.
*
* MXS_ALERT Not throttled To be used when the system is about to go down in flames.
* MXS_ERROR Throttled For errors.
* MXS_WARNING Throttled For warnings.
* MXS_NOTICE Not Throttled For messages deemed important, typically used during startup.
* MXS_INFO Not Throttled For information thought to be of value for investigating some problem.
* MXS_DEBUG Not Throttled For debugging messages during development. Should be removed when a
* feature is ready.
*
* @param format The printf format of the message.
* @param ... Arguments, depending on the format.
*/
#define MXS_ALERT(format, ...) MXS_LOG_MESSAGE(LOG_ALERT, format, ##__VA_ARGS__)
#define MXS_ERROR(format, ...) MXS_LOG_MESSAGE(LOG_ERR, format, ##__VA_ARGS__)
#define MXS_WARNING(format, ...) MXS_LOG_MESSAGE(LOG_WARNING, format, ##__VA_ARGS__)
#define MXS_NOTICE(format, ...) MXS_LOG_MESSAGE(LOG_NOTICE, format, ##__VA_ARGS__)