fc7e90bcb95ecf319c89e6bd8979602eddaac0ef
[lttng-tools.git] / src / bin / lttng-sessiond / notification-thread-commands.h
1 /*
2 * Copyright (C) 2017 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
3 *
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.
7 *
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
11 * more details.
12 *
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.
16 */
17
18 #ifndef NOTIFICATION_THREAD_COMMANDS_H
19 #define NOTIFICATION_THREAD_COMMANDS_H
20
21 #include <lttng/domain.h>
22 #include <lttng/lttng-error.h>
23 #include <urcu/rculfhash.h>
24 #include "notification-thread.h"
25
26 struct notification_thread_data;
27 struct lttng_trigger;
28
29 enum notification_thread_command_type {
30 NOTIFICATION_COMMAND_TYPE_REGISTER_TRIGGER,
31 NOTIFICATION_COMMAND_TYPE_UNREGISTER_TRIGGER,
32 NOTIFICATION_COMMAND_TYPE_ADD_CHANNEL,
33 NOTIFICATION_COMMAND_TYPE_REMOVE_CHANNEL,
34 NOTIFICATION_COMMAND_TYPE_QUIT,
35 };
36
37 struct channel_key {
38 uint64_t key;
39 enum lttng_domain_type domain;
40 };
41
42 struct channel_info {
43 struct channel_key key;
44 char *session_name;
45 uid_t uid;
46 gid_t gid;
47 char *channel_name;
48 uint64_t capacity;
49 struct cds_lfht_node channels_ht_node;
50 };
51
52 struct notification_thread_command {
53 struct cds_list_head cmd_list_node;
54
55 enum notification_thread_command_type type;
56 union {
57 /* Register/Unregister trigger. */
58 struct lttng_trigger *trigger;
59 /* Add channel. */
60 struct channel_info add_channel;
61 /* Remove channel. */
62 struct {
63 uint64_t key;
64 enum lttng_domain_type domain;
65 } remove_channel;
66 } parameters;
67
68 /* Futex on which to wait for command reply (optional). */
69 int32_t reply_futex;
70 enum lttng_error_code reply_code;
71 };
72
73 enum lttng_error_code notification_thread_command_register_trigger(
74 struct notification_thread_handle *handle,
75 struct lttng_trigger *trigger);
76
77 enum lttng_error_code notification_thread_command_unregister_trigger(
78 struct notification_thread_handle *handle,
79 struct lttng_trigger *trigger);
80
81 enum lttng_error_code notification_thread_command_add_channel(
82 struct notification_thread_handle *handle,
83 char *session_name, uid_t uid, gid_t gid,
84 char *channel_name, uint64_t key,
85 enum lttng_domain_type domain, uint64_t capacity);
86
87 enum lttng_error_code notification_thread_command_remove_channel(
88 struct notification_thread_handle *handle,
89 uint64_t key, enum lttng_domain_type domain);
90
91 void notification_thread_command_quit(
92 struct notification_thread_handle *handle);
93
94 #endif /* NOTIFICATION_THREAD_COMMANDS_H */
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