SoW-2019-0002: Dynamic Snapshot

[lttng-tools.git] / src / bin / lttng-sessiond / agent.h

diff --git a/src/bin/lttng-sessiond/agent.h b/src/bin/lttng-sessiond/agent.h
index 2d2d6425559d2330904bd9d6c83eb24dbcba7872..ebb12628e15ebd08cae0981021991a3a193bd527 100644 (file)
--- a/src/bin/lttng-sessiond/agent.h
+++ b/src/bin/lttng-sessiond/agent.h
@@ -24,11 +24,15 @@
  */
 extern struct lttng_ht *agent_apps_ht_by_sock;
 
+/*
+ * Hash table that contains the trigger agents by domain */
+extern struct lttng_ht *trigger_agents_ht_by_domain;
+
 struct agent_ht_key {
        const char *name;
        int loglevel_value;
        enum lttng_loglevel_type loglevel_type;
-       char *filter_expression;
+       const char *filter_expression;
 };
 
 /*
@@ -87,6 +91,12 @@ struct agent_event {
        struct lttng_filter_bytecode *filter;
        char *filter_expression;
        struct lttng_event_exclusion *exclusion;
+
+       /*
+        * Multiple triggers and events can use this agent event.
+        * The event can only be disabled when the count is zero.
+        */
+       unsigned int user_refcount;
 };
 
 /*
@@ -133,8 +143,10 @@ struct agent_event *agent_create_event(const char *name,
 void agent_add_event(struct agent_event *event, struct agent *agt);
 
 struct agent_event *agent_find_event(const char *name,
-               enum lttng_loglevel_type loglevel_type, int loglevel_value,
-               char *filter_expression, struct agent *agt);
+               enum lttng_loglevel_type loglevel_type,
+               int loglevel_value,
+               const char *filter_expression,
+               struct agent *agt);
 void agent_find_events_by_name(const char *name, struct agent *agt,
                struct lttng_ht_iter* iter);
 void agent_event_next_duplicate(const char *name,
@@ -167,4 +179,12 @@ void agent_update(struct agent *agt, int sock);
 int agent_list_events(struct lttng_event **events,
                enum lttng_domain_type domain);
 
+struct agent_event *agent_find_event_by_trigger(
+               const struct lttng_trigger *trigger, struct agent *agt);
+
+/* todo: find a better place for this */
+struct agent *trigger_find_agent(enum lttng_domain_type domain_type);
+void trigger_agent_ht_clean(void);
+int trigger_agent_ht_alloc(void);
+
 #endif /* LTTNG_SESSIOND_AGENT_H */