2 * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com>
4 * SPDX-License-Identifier: GPL-2.0-only
8 #ifndef NOTIFICATION_THREAD_COMMANDS_H
9 #define NOTIFICATION_THREAD_COMMANDS_H
11 #include <lttng/domain.h>
12 #include <lttng/lttng-error.h>
13 #include <urcu/rculfhash.h>
14 #include "notification-thread.h"
15 #include "notification-thread-internal.h"
16 #include "notification-thread-events.h"
17 #include <common/waiter.h>
20 struct notification_thread_data
;
23 enum notification_thread_command_type
{
24 NOTIFICATION_COMMAND_TYPE_REGISTER_TRIGGER
,
25 NOTIFICATION_COMMAND_TYPE_UNREGISTER_TRIGGER
,
26 NOTIFICATION_COMMAND_TYPE_ADD_CHANNEL
,
27 NOTIFICATION_COMMAND_TYPE_REMOVE_CHANNEL
,
28 NOTIFICATION_COMMAND_TYPE_SESSION_ROTATION_ONGOING
,
29 NOTIFICATION_COMMAND_TYPE_SESSION_ROTATION_COMPLETED
,
30 NOTIFICATION_COMMAND_TYPE_ADD_TRACER_EVENT_SOURCE
,
31 NOTIFICATION_COMMAND_TYPE_REMOVE_TRACER_EVENT_SOURCE
,
32 NOTIFICATION_COMMAND_TYPE_LIST_TRIGGERS
,
33 NOTIFICATION_COMMAND_TYPE_QUIT
,
34 NOTIFICATION_COMMAND_TYPE_CLIENT_COMMUNICATION_UPDATE
,
37 struct notification_thread_command
{
38 struct cds_list_head cmd_list_node
;
40 enum notification_thread_command_type type
;
42 /* Register/Unregister trigger. */
43 struct lttng_trigger
*trigger
;
53 enum lttng_domain_type domain
;
61 enum lttng_domain_type domain
;
64 const char *session_name
;
67 uint64_t trace_archive_chunk_id
;
68 struct lttng_trace_archive_location
*location
;
70 /* Add/Remove tracer event source fd. */
72 int tracer_event_source_fd
;
73 enum lttng_domain_type domain
;
74 } tracer_event_source
;
77 /* Credentials of the requesting user. */
80 /* Client communication update. */
82 notification_client_id id
;
83 enum client_transmission_status status
;
84 } client_communication_update
;
90 struct lttng_triggers
*triggers
;
93 /* lttng_waiter on which to wait for command reply (optional). */
94 struct lttng_waiter reply_waiter
;
95 enum lttng_error_code reply_code
;
99 enum lttng_error_code
notification_thread_command_register_trigger(
100 struct notification_thread_handle
*handle
,
101 struct lttng_trigger
*trigger
);
103 enum lttng_error_code
notification_thread_command_unregister_trigger(
104 struct notification_thread_handle
*handle
,
105 struct lttng_trigger
*trigger
);
107 enum lttng_error_code
notification_thread_command_add_channel(
108 struct notification_thread_handle
*handle
,
109 char *session_name
, uid_t session_uid
, gid_t session_gid
,
110 char *channel_name
, uint64_t key
,
111 enum lttng_domain_type domain
, uint64_t capacity
);
113 enum lttng_error_code
notification_thread_command_remove_channel(
114 struct notification_thread_handle
*handle
,
115 uint64_t key
, enum lttng_domain_type domain
);
117 enum lttng_error_code
notification_thread_command_session_rotation_ongoing(
118 struct notification_thread_handle
*handle
,
119 const char *session_name
, uid_t session_uid
, gid_t session_gid
,
120 uint64_t trace_archive_chunk_id
);
122 /* Ownership of location is transferred. */
123 enum lttng_error_code
notification_thread_command_session_rotation_completed(
124 struct notification_thread_handle
*handle
,
125 const char *session_name
, uid_t session_uid
, gid_t session_gid
,
126 uint64_t trace_archive_chunk_id
,
127 struct lttng_trace_archive_location
*location
);
130 * Return the set of triggers visible to a given client.
132 * The trigger objects contained in the set are the actual trigger instances
133 * used by the notification subsystem (i.e. not a copy). Given that the command
134 * is only used to serialize the triggers, this is fine: the properties that
135 * are serialized are immutable over the lifetime of the triggers.
137 * Moreover, the lifetime of the trigger instances is protected through
138 * reference counting (references are held by the trigger set).
140 * The caller has the exclusive ownership of the returned trigger set.
142 enum lttng_error_code
notification_thread_command_list_triggers(
143 struct notification_thread_handle
*handle
,
145 struct lttng_triggers
**triggers
);
148 * The ownership of trigger_event_application_pipe is _not_ transferred to
149 * the notification thread.
151 enum lttng_error_code
notification_thread_command_add_tracer_event_source(
152 struct notification_thread_handle
*handle
,
153 int tracer_event_source_fd
,
154 enum lttng_domain_type domain
);
156 enum lttng_error_code
notification_thread_command_remove_tracer_event_source(
157 struct notification_thread_handle
*handle
,
158 int tracer_event_source_fd
);
160 void notification_thread_command_quit(
161 struct notification_thread_handle
*handle
);
163 #endif /* NOTIFICATION_THREAD_COMMANDS_H */