sessiond: document effect of rotated_after_last_stop on clear

[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 6564b88c84f6e260d1f875074d6bb313fa4b73aa..ea5662754aef05fdecafe576b0abb97c2b9783eb 100644 (file)
--- a/src/bin/lttng-sessiond/agent.h
+++ b/src/bin/lttng-sessiond/agent.h
@@ -1,5 +1,6 @@
 /*
  * Copyright (C) 2013 - David Goulet <dgoulet@efficios.com>
+ * Copyright (C) 2016 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License, version 2 only, as
@@ -18,25 +19,26 @@
 #ifndef LTTNG_SESSIOND_AGENT_H
 #define LTTNG_SESSIOND_AGENT_H
 
-#define _GNU_SOURCE
 #include <inttypes.h>
 
 #include <common/hashtable/hashtable.h>
 #include <lttng/lttng.h>
 
 /* Agent protocol version that is verified during the agent registration. */
-#define AGENT_MAJOR_VERSION            1
+#define AGENT_MAJOR_VERSION            2
 #define AGENT_MINOR_VERSION            0
 
 /*
  * Hash table that contains the agent app created upon registration indexed by
- * socket.
+ * socket. Global to the session daemon.
  */
-struct lttng_ht *agent_apps_ht_by_sock;
+extern struct lttng_ht *agent_apps_ht_by_sock;
 
 struct agent_ht_key {
        const char *name;
-       int loglevel;
+       int loglevel_value;
+       enum lttng_loglevel_type loglevel_type;
+       char *filter_expression;
 };
 
 /*
@@ -58,7 +60,7 @@ struct agent_register_msg {
  */
 struct agent_app {
        /*
-        * PID sent during registration of a AGENT application.
+        * PID sent during registration of an agent application.
         */
        pid_t pid;
 
@@ -80,7 +82,7 @@ struct agent_app {
 struct agent_event {
        /* Name of the event. */
        char name[LTTNG_SYMBOL_NAME_LEN];
-       int loglevel;
+       int loglevel_value;
        enum lttng_loglevel_type loglevel_type;
 
        /*
@@ -91,8 +93,10 @@ struct agent_event {
        /* Hash table node of the agent domain object. */
        struct lttng_ht_node_str node;
 
-       /* Bytecode filter associated with the event . NULL if none. */
+       /* Filter associated with the event. NULL if none. */
        struct lttng_filter_bytecode *filter;
+       char *filter_expression;
+       struct lttng_event_exclusion *exclusion;
 };
 
 /*
@@ -113,12 +117,17 @@ struct agent {
        /* Contains event indexed by name. */
        struct lttng_ht *events;
 
+       /* Application context list (struct agent_app_ctx). */
+       struct cds_list_head app_ctx_list;
+
        /* Node used for the hash table indexed by domain type. */
        struct lttng_ht_node_u64 node;
 };
 
-/* Setup agent subsystem. */
-int agent_setup(void);
+/* Allocate agent apps hash table */
+int agent_app_ht_alloc(void);
+/* Clean-up agent apps hash table */
+void agent_app_ht_clean(void);
 
 /* Initialize an already allocated agent domain. */
 int agent_init(struct agent *agt);
@@ -128,16 +137,27 @@ void agent_add(struct agent *agt, struct lttng_ht *ht);
 
 /* Agent event API. */
 struct agent_event *agent_create_event(const char *name,
-               struct lttng_filter_bytecode *filter);
+               enum lttng_loglevel_type loglevel_type, int loglevel_value,
+               struct lttng_filter_bytecode *filter,
+               char *filter_expression);
 void agent_add_event(struct agent_event *event, struct agent *agt);
 
-struct agent_event *agent_find_event(const char *name, int loglevel,
-               struct agent *agt);
-struct agent_event *agent_find_event_by_name(const char *name,
-               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);
+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,
+               struct agent *agt, struct lttng_ht_iter* iter);
 void agent_delete_event(struct agent_event *event, struct agent *agt);
 void agent_destroy_event(struct agent_event *event);
 
+/* Agent context API.*/
+int agent_enable_context(const struct lttng_event_context *ctx,
+               enum lttng_domain_type domain);
+int agent_add_context(const struct lttng_event_context *ctx,
+               struct agent *agt);
+
 /* Agent app API. */
 struct agent_app *agent_create_app(pid_t pid, enum lttng_domain_type domain,
                struct lttcomm_sock *sock);
@@ -145,6 +165,7 @@ void agent_add_app(struct agent_app *app);
 void agent_delete_app(struct agent_app *app);
 struct agent_app *agent_find_app_by_sock(int sock);
 void agent_destroy_app(struct agent_app *app);
+void agent_destroy_app_by_sock(int sock);
 int agent_send_registration_done(struct agent_app *app);
 
 /* Agent action API */