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Session-specific logging. Added functions

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void session_enable_log(SESSION* ses, logfile_id_t id)
and
void session_disable_log(SESSION* ses, logfile_id_t id)

Which switch specific log type on/off if the log type in question is not generally enabled.

Each thread carries a thread-specific struct log_info_t which includes members for current session id and bitfield for enabled log types for the current session. That information is checked before actual log write functions are called.

Each file where session-specific logging is used, must include the following exports:

/** Defined in log_manager.cc */
extern int            lm_enabled_logfiles_bitmask;
extern size_t         log_ses_count[];
extern __thread log_info_t tls_log_info;
This commit is contained in:
VilhoRaatikka
2014-11-19 00:08:59 +02:00
parent 7ef54219a6
commit fd11e6a7f5
39 changed files with 379 additions and 133 deletions
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31
server/include/session.h
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@ -41,6 +41,7 @@
#include <buffer.h>
#include <spinlock.h>
#include <skygw_utils.h>
#include <log_manager.h>
struct dcb;
struct service;
@ -109,19 +110,20 @@ typedef struct session {
skygw_chk_t ses_chk_top;
#endif
SPINLOCK ses_lock;
session_state_t state; /**< Current descriptor state */
size_t ses_id; /**< unique session identifier */
struct dcb *client; /**< The client connection */
void *data; /**< The session data */
void *router_session;/**< The router instance data */
SESSION_STATS stats; /**< Session statistics */
struct service *service; /**< The service this session is using */
int n_filters; /**< Number of filter sessions */
SESSION_FILTER *filters; /**< The filters in use within this session */
DOWNSTREAM head; /**< Head of the filter chain */
UPSTREAM tail; /**< The tail of the filter chain */
struct session *next; /**< Linked list of all sessions */
int refcount; /**< Reference count on the session */
session_state_t state; /*< Current descriptor state */
size_t ses_id; /*< Unique session identifier */
int ses_enabled_logs; /*< Bitfield of enabled logs */
struct dcb *client; /*< The client connection */
void *data; /*< The session data */
void *router_session; /*< The router instance data */
SESSION_STATS stats; /*< Session statistics */
struct service *service; /*< The service this session is using */
int n_filters; /*< Number of filter sessions */
SESSION_FILTER *filters; /*< The filters in use within this session */
DOWNSTREAM head; /*< Head of the filter chain */
UPSTREAM tail; /*< The tail of the filter chain */
struct session *next; /*< Linked list of all sessions */
int refcount; /*< Reference count on the session */
#if defined(SS_DEBUG)
skygw_chk_t ses_chk_tail;
#endif
@ -160,4 +162,7 @@ void dListSessions(struct dcb *);
char *session_state(int);
bool session_link_dcb(SESSION *, struct dcb *);
SESSION* get_session_by_router_ses(void* rses);
void session_enable_log(SESSION* ses, logfile_id_t id);
void session_disable_log(SESSION* ses, logfile_id_t id);
#endif