2 * Copyright (C) 2013 - David Goulet <dgoulet@efficios.com>
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License, version 2 only, as
6 * published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc., 51
15 * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 #ifndef LTTNG_SESSIOND_AGENT_H
19 #define LTTNG_SESSIOND_AGENT_H
24 #include <common/hashtable/hashtable.h>
25 #include <lttng/lttng.h>
28 * Hash table that contains the agent app created upon registration indexed by
31 struct lttng_ht
*agent_apps_ht_by_sock
;
39 * Registration message payload from an agent application. The PID is used to
40 * find back the corresponding UST app object so both socket can be linked.
42 struct agent_register_msg
{
47 * Agent application object created after a successful registration. This
48 * object is linked to its associated UST app by their PID through hash table
53 * PID sent during registration of a AGENT application.
58 * AGENT TCP socket that was created upon registration.
60 struct lttcomm_sock
*sock
;
62 /* Initialized with the AGENT sock value. */
63 struct lttng_ht_node_ulong node
;
67 * Agent event representation.
70 /* Name of the event. */
71 char name
[LTTNG_SYMBOL_NAME_LEN
];
73 enum lttng_loglevel_type loglevel_type
;
76 * Tells if the event is enabled or not on the agent.
78 unsigned int enabled
:1;
80 /* Hash table node of the agent domain object. */
81 struct lttng_ht_node_str node
;
83 /* Bytecode filter associated with the event . NULL if none. */
84 struct lttng_filter_bytecode
*filter
;
88 * Agent object containing events enabled/disabled for it.
92 * This indicates if that domain is being used meaning if at least one
93 * event has been at some point in time added to it. This is used so when
94 * listing domains for a session, we can tell or not if the agent is
97 unsigned int being_used
:1;
98 /* Contains event indexed by name. */
99 struct lttng_ht
*events
;
102 /* Setup agent subsystem. */
103 int agent_setup(void);
105 /* Initialize an already allocated agent domain. */
106 int agent_init(struct agent
*agt
);
107 void agent_destroy(struct agent
*agt
);
109 /* Agent event API. */
110 struct agent_event
*agent_create_event(const char *name
,
111 struct lttng_filter_bytecode
*filter
);
112 void agent_add_event(struct agent_event
*event
, struct agent
*agt
);
114 struct agent_event
*agent_find_event(const char *name
, int loglevel
,
116 struct agent_event
*agent_find_event_by_name(const char *name
,
118 void agent_delete_event(struct agent_event
*event
, struct agent
*agt
);
119 void agent_destroy_event(struct agent_event
*event
);
122 struct agent_app
*agent_create_app(pid_t pid
, struct lttcomm_sock
*sock
);
123 void agent_add_app(struct agent_app
*app
);
124 void agent_delete_app(struct agent_app
*app
);
125 struct agent_app
*agent_find_app_by_sock(int sock
);
126 void agent_destroy_app(struct agent_app
*app
);
127 int agent_send_registration_done(struct agent_app
*app
);
129 /* Agent action API */
130 int agent_enable_event(struct agent_event
*event
);
131 int agent_disable_event(struct agent_event
*event
);
132 void agent_update(struct agent
*agt
, int sock
);
133 int agent_list_events(struct lttng_event
**events
);
135 #endif /* LTTNG_SESSIOND_AGENT_H */