MAX-328, Add session identifier to trace log entries. Session id is given to session in session_alloc and stored to thread's local storage variable when thread picks a new event from epoll_wait.

server/include/dcb.h

@@ -307,16 +307,11 @@ int		dcb_remove_callback(DCB *, DCB_REASON, int (*)(struct dcb *, DCB_REASON, vo
 			 void *);
 int		dcb_isvalid(DCB *);			/* Check the DCB is in the linked list */
 
-bool dcb_set_state(
-        DCB*         dcb,
-        dcb_state_t  new_state,
-        dcb_state_t* old_state);
-void dcb_call_foreach (DCB_REASON reason);
+bool   dcb_set_state(DCB* dcb, dcb_state_t new_state, dcb_state_t* old_state);
+void   dcb_call_foreach (DCB_REASON reason);
+size_t dcb_get_session_id(DCB* dcb);;
 
 
-void dcb_call_foreach (
-        DCB_REASON reason);
-
 /**
  * DCB flags values
  */

server/include/session.h

@@ -110,6 +110,7 @@ typedef struct session {
 #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 */