8da147230e22a928ec89b7b33f37c9a84d02cc8c
[lttng-tools.git] / ltt-sessiond / trace.h
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
22 #include <limits.h>
23 #include <urcu/list.h>
24
25 #include <lttng/lttng.h>
26
27 #include "lttng-kernel.h"
28
29 /* Kernel event list */
30 struct ltt_kernel_event_list {
31 struct cds_list_head head;
32 };
33
34 /* Channel stream list */
35 struct ltt_kernel_stream_list {
36 struct cds_list_head head;
37 };
38
39 /* Channel list */
40 struct ltt_kernel_channel_list {
41 struct cds_list_head head;
42 };
43
44 /* Kernel event */
45 struct ltt_kernel_event {
46 int fd;
47 int enabled;
48 struct lttng_kernel_event *event;
49 struct cds_list_head list;
50 };
51
52 /* Kernel channel */
53 struct ltt_kernel_channel {
54 int fd;
55 char *pathname;
56 unsigned int stream_count;
57 struct lttng_channel *channel;
58 struct ltt_kernel_event_list events_list;
59 struct ltt_kernel_stream_list stream_list;
60 struct cds_list_head list;
61 };
62
63 /* Metadata */
64 struct ltt_kernel_metadata {
65 int fd;
66 char *pathname;
67 struct lttng_channel *conf;
68 };
69
70 /* Channel stream */
71 struct ltt_kernel_stream {
72 int fd;
73 char *pathname;
74 int state;
75 struct cds_list_head list;
76 };
77
78 /* Kernel session */
79 struct ltt_kernel_session {
80 int fd;
81 int metadata_stream_fd;
82 int kconsumer_fds_sent;
83 unsigned int channel_count;
84 unsigned int stream_count_global;
85 struct ltt_kernel_metadata *metadata;
86 struct ltt_kernel_channel_list channel_list;
87 };
88
89 /* UST trace representation */
90 struct ltt_ust_trace {
91 struct cds_list_head list;
92 char name[NAME_MAX];
93 int shmid;
94 pid_t pid;
95 struct cds_list_head markers;
96 };
97
98 struct ltt_ust_marker {
99 struct cds_list_head list;
100 char *name;
101 char *channel;
102 };
103
104 /*
105 * Create functions malloc() the data structure.
106 */
107 struct ltt_kernel_session *trace_create_kernel_session(void);
108 struct ltt_kernel_channel *trace_create_kernel_channel(struct lttng_channel *chan);
109 struct ltt_kernel_event *trace_create_kernel_event(struct lttng_event *ev);
110 struct ltt_kernel_metadata *trace_create_kernel_metadata(void);
111 struct ltt_kernel_stream *trace_create_kernel_stream(void);
112
113 /*
114 * Destroy functions free() the data structure and remove from linked list if
115 * it's applies.
116 */
117 void trace_destroy_kernel_session(struct ltt_kernel_session *session);
118 void trace_destroy_kernel_metadata(struct ltt_kernel_metadata *metadata);
119 void trace_destroy_kernel_channel(struct ltt_kernel_channel *channel);
120 void trace_destroy_kernel_event(struct ltt_kernel_event *event);
121 void trace_destroy_kernel_stream(struct ltt_kernel_stream *stream);
122
123 #endif /* _LTT_TRACE_H */
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