8fdef2a37721443de94c1fabe92669073cff49d1
[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 struct lttng_kernel_event *event;
48 struct cds_list_head list;
49 };
50
51 /* Kernel channel */
52 struct ltt_kernel_channel {
53 int fd;
54 char *pathname;
55 unsigned int stream_count;
56 struct lttng_channel *channel;
57 struct ltt_kernel_event_list events_list;
58 struct ltt_kernel_stream_list stream_list;
59 struct cds_list_head list;
60 };
61
62 /* Metadata */
63 struct ltt_kernel_metadata {
64 int fd;
65 char *pathname;
66 struct lttng_channel *conf;
67 };
68
69 /* Channel stream */
70 struct ltt_kernel_stream {
71 int fd;
72 char *pathname;
73 int state;
74 struct cds_list_head list;
75 };
76
77 /* Kernel session */
78 struct ltt_kernel_session {
79 int fd;
80 int metadata_stream_fd;
81 int kconsumer_fds_sent;
82 unsigned int channel_count;
83 unsigned int stream_count_global;
84 struct ltt_kernel_metadata *metadata;
85 struct ltt_kernel_channel_list channel_list;
86 };
87
88 /* UST trace representation */
89 struct ltt_ust_trace {
90 struct cds_list_head list;
91 char name[NAME_MAX];
92 int shmid;
93 pid_t pid;
94 struct cds_list_head markers;
95 };
96
97 struct ltt_ust_marker {
98 struct cds_list_head list;
99 char *name;
100 char *channel;
101 };
102
103 /*
104 * Create functions malloc() the data structure.
105 */
106 struct ltt_kernel_session *trace_create_kernel_session(void);
107 struct ltt_kernel_channel *trace_create_kernel_channel(struct lttng_channel *chan);
108 struct ltt_kernel_event *trace_create_kernel_event(struct lttng_event *ev);
109 struct ltt_kernel_metadata *trace_create_kernel_metadata(void);
110 struct ltt_kernel_stream *trace_create_kernel_stream(void);
111
112 /*
113 * Destroy functions free() the data structure and remove from linked list if
114 * it's applies.
115 */
116 void trace_destroy_kernel_session(struct ltt_kernel_session *session);
117 void trace_destroy_kernel_metadata(struct ltt_kernel_metadata *metadata);
118 void trace_destroy_kernel_channel(struct ltt_kernel_channel *channel);
119 void trace_destroy_kernel_event(struct ltt_kernel_event *event);
120 void trace_destroy_kernel_stream(struct ltt_kernel_stream *stream);
121
122 #endif /* _LTT_TRACE_H */
This page took 0.053472 seconds and 4 git commands to generate.