Fix disable event
[lttng-tools.git] / ltt-sessiond / trace-ust.h
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1/*
2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; only version 2
7 * of the License.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 */
18
19#ifndef _LTT_TRACE_UST_H
20#define _LTT_TRACE_UST_H
21
22#include <limits.h>
23#include <urcu/list.h>
24
25#include <lttng/lttng.h>
26#include <lttng-ust.h>
27
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28/*
29 * UST session list.
30 */
31struct ltt_ust_session_list {
32 unsigned int count;
33 struct cds_list_head head;
34};
35
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36/* UST event list */
37struct ltt_ust_event_list {
38 unsigned int count;
39 struct cds_list_head head;
40};
41
42/* UST Channel list */
43struct ltt_ust_channel_list {
44 unsigned int count;
45 struct cds_list_head head;
46};
47
48/* UST event */
49struct ltt_ust_event {
50 int handle;
51 int enabled;
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52 struct lttng_ust_context ctx;
53 struct lttng_ust_event attr;
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54 struct cds_list_head list;
55};
56
57/* UST channel */
58struct ltt_ust_channel {
59 int handle;
60 int enabled;
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61 char name[LTTNG_UST_SYM_NAME_LEN];
62 char trace_path[PATH_MAX]; /* Trace file path name */
63 struct lttng_ust_context ctx;
64 struct lttng_ust_channel attr;
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65 struct ltt_ust_event_list events;
66 struct cds_list_head list;
67};
68
69/* UST Metadata */
70struct ltt_ust_metadata {
71 int handle;
72 char *trace_path; /* Trace file path name */
44d3bd01 73 struct lttng_ust_channel attr;
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74};
75
76/* UST session */
77struct ltt_ust_session {
78 int handle;
79 int enabled;
80 int uconsumer_fds_sent;
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81 char path[PATH_MAX];
82 struct lttng_domain domain;
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83 struct ltt_ust_metadata *metadata;
84 struct ltt_ust_channel_list channels;
0177d773 85 struct cds_list_head list;
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86};
87
88/*
89 * Lookup functions. NULL is returned if not found.
90 */
91struct ltt_ust_event *trace_ust_get_event_by_name(
92 char *name, struct ltt_ust_channel *channel);
93struct ltt_ust_channel *trace_ust_get_channel_by_name(
94 char *name, struct ltt_ust_session *session);
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95struct ltt_ust_session *trace_ust_get_session_by_pid(
96 struct ltt_ust_session_list *session_list, pid_t pid);
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97
98/*
99 * Create functions malloc() the data structure.
100 */
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101struct ltt_ust_session *trace_ust_create_session(char *path, pid_t pid,
102 struct lttng_domain *domain);
103struct ltt_ust_channel *trace_ust_create_channel(struct lttng_channel *attr,
104 char *path);
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105struct ltt_ust_event *trace_ust_create_event(struct lttng_event *ev);
106struct ltt_ust_metadata *trace_ust_create_metadata(char *path);
107
108/*
109 * Destroy functions free() the data structure and remove from linked list if
110 * it's applies.
111 */
112void trace_ust_destroy_session(struct ltt_ust_session *session);
113void trace_ust_destroy_metadata(struct ltt_ust_metadata *metadata);
114void trace_ust_destroy_channel(struct ltt_ust_channel *channel);
115void trace_ust_destroy_event(struct ltt_ust_event *event);
116
117#endif /* _LTT_TRACE_UST_H */
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