Add disable kernel event support
[lttng-tools.git] / ltt-sessiond / trace.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; either version 2
7 * of the License, or (at your option) any later version.
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_H
20#define _LTT_TRACE_H
21
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22#include <limits.h>
23#include <urcu/list.h>
d4a2a84a 24
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25#include <lttng/lttng.h>
26
27#include "lttng-kernel.h"
54012638 28
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29/* Kernel event list */
30struct ltt_kernel_event_list {
31 struct cds_list_head head;
32};
33
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34/* Channel stream list */
35struct ltt_kernel_stream_list {
36 struct cds_list_head head;
37};
38
39/* Channel list */
40struct ltt_kernel_channel_list {
41 struct cds_list_head head;
42};
43
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44/* Kernel event */
45struct ltt_kernel_event {
20fe2104 46 int fd;
e953ef25 47 int enabled;
f34daff7 48 struct lttng_kernel_event *event;
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49 struct cds_list_head list;
50};
51
52/* Kernel channel */
53struct ltt_kernel_channel {
54 int fd;
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55 char *pathname;
56 unsigned int stream_count;
f3ed775e 57 struct lttng_channel *channel;
20fe2104 58 struct ltt_kernel_event_list events_list;
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59 struct ltt_kernel_stream_list stream_list;
60 struct cds_list_head list;
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61};
62
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63/* Metadata */
64struct ltt_kernel_metadata {
65 int fd;
8c0faa1d 66 char *pathname;
f3ed775e 67 struct lttng_channel *conf;
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68};
69
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70/* Channel stream */
71struct ltt_kernel_stream {
72 int fd;
73 char *pathname;
74 int state;
75 struct cds_list_head list;
76};
77
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78/* Kernel session */
79struct ltt_kernel_session {
80 int fd;
8c0faa1d 81 int metadata_stream_fd;
f3ed775e 82 int kconsumer_fds_sent;
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83 unsigned int channel_count;
84 unsigned int stream_count_global;
aaf26714 85 struct ltt_kernel_metadata *metadata;
8c0faa1d 86 struct ltt_kernel_channel_list channel_list;
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87};
88
89/* UST trace representation */
90struct ltt_ust_trace {
91 struct cds_list_head list;
1657e9bb 92 char name[NAME_MAX];
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93 int shmid;
94 pid_t pid;
95 struct cds_list_head markers;
96};
97
98struct ltt_ust_marker {
99 struct cds_list_head list;
100 char *name;
101 char *channel;
102};
103
54012638 104/*
c363b55d 105 * Create functions malloc() the data structure.
54012638 106 */
54012638 107struct ltt_kernel_session *trace_create_kernel_session(void);
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108struct ltt_kernel_channel *trace_create_kernel_channel(struct lttng_channel *chan);
109struct ltt_kernel_event *trace_create_kernel_event(struct lttng_event *ev);
54012638 110struct ltt_kernel_metadata *trace_create_kernel_metadata(void);
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111struct ltt_kernel_stream *trace_create_kernel_stream(void);
112
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113/*
114 * Destroy functions free() the data structure and remove from linked list if
115 * it's applies.
116 */
117void trace_destroy_kernel_session(struct ltt_kernel_session *session);
118void trace_destroy_kernel_metadata(struct ltt_kernel_metadata *metadata);
119void trace_destroy_kernel_channel(struct ltt_kernel_channel *channel);
120void trace_destroy_kernel_event(struct ltt_kernel_event *event);
121void trace_destroy_kernel_stream(struct ltt_kernel_stream *stream);
122
fda89c9b 123#endif /* _LTT_TRACE_H */
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