Improve trace output path and config path
[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_context *ctx;
49 struct lttng_kernel_event *event;
50 struct cds_list_head list;
51 };
52
53 /* Kernel channel */
54 struct ltt_kernel_channel {
55 int fd;
56 int enabled;
57 char *pathname;
58 unsigned int stream_count;
59 struct lttng_kernel_context *ctx;
60 struct lttng_channel *channel;
61 struct ltt_kernel_event_list events_list;
62 struct ltt_kernel_stream_list stream_list;
63 struct cds_list_head list;
64 };
65
66 /* Metadata */
67 struct ltt_kernel_metadata {
68 int fd;
69 char *pathname;
70 struct lttng_channel *conf;
71 };
72
73 /* Channel stream */
74 struct ltt_kernel_stream {
75 int fd;
76 char *pathname;
77 int state;
78 struct cds_list_head list;
79 };
80
81 /* Kernel session */
82 struct ltt_kernel_session {
83 int fd;
84 int metadata_stream_fd;
85 int kconsumer_fds_sent;
86 unsigned int channel_count;
87 unsigned int stream_count_global;
88 struct ltt_kernel_metadata *metadata;
89 struct ltt_kernel_channel_list channel_list;
90 };
91
92 /* UST trace representation */
93 struct ltt_ust_trace {
94 struct cds_list_head list;
95 char name[NAME_MAX];
96 int shmid;
97 pid_t pid;
98 struct cds_list_head markers;
99 };
100
101 struct ltt_ust_marker {
102 struct cds_list_head list;
103 char *name;
104 char *channel;
105 };
106
107 /*
108 * Get functions.
109 */
110 struct ltt_kernel_event *get_kernel_event_by_name(
111 char *name, struct ltt_kernel_channel *channel);
112 struct ltt_kernel_channel *get_kernel_channel_by_name(
113 char *name, struct ltt_kernel_session *session);
114
115 /*
116 * Create functions malloc() the data structure.
117 */
118 struct ltt_kernel_session *trace_create_kernel_session(void);
119 struct ltt_kernel_channel *trace_create_kernel_channel(struct lttng_channel *chan, char *path);
120 struct ltt_kernel_event *trace_create_kernel_event(struct lttng_event *ev);
121 struct ltt_kernel_metadata *trace_create_kernel_metadata(void);
122 struct ltt_kernel_stream *trace_create_kernel_stream(void);
123
124 /*
125 * Destroy functions free() the data structure and remove from linked list if
126 * it's applies.
127 */
128 void trace_destroy_kernel_session(struct ltt_kernel_session *session);
129 void trace_destroy_kernel_metadata(struct ltt_kernel_metadata *metadata);
130 void trace_destroy_kernel_channel(struct ltt_kernel_channel *channel);
131 void trace_destroy_kernel_event(struct ltt_kernel_event *event);
132 void trace_destroy_kernel_stream(struct ltt_kernel_stream *stream);
133
134 #endif /* _LTT_TRACE_H */
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