Fix headers include and rename kernctl.h header
[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; 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_H
20 #define _LTT_TRACE_H
21
22 #include <limits.h>
23 #include <urcu/list.h>
24
25 #include <lttng/lttng.h>
26 #include <lttng-kernel.h>
27
28 /* Kernel event list */
29 struct ltt_kernel_event_list {
30 struct cds_list_head head;
31 };
32
33 /* Channel stream list */
34 struct ltt_kernel_stream_list {
35 struct cds_list_head head;
36 };
37
38 /* Channel list */
39 struct ltt_kernel_channel_list {
40 struct cds_list_head head;
41 };
42
43 /* Kernel event */
44 struct ltt_kernel_event {
45 int fd;
46 int enabled;
47 struct lttng_kernel_context *ctx;
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 int enabled;
56 char *pathname;
57 unsigned int stream_count;
58 unsigned int event_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 int consumer_fd;
87 unsigned int channel_count;
88 unsigned int stream_count_global;
89 char *trace_path;
90 struct ltt_kernel_metadata *metadata;
91 struct ltt_kernel_channel_list channel_list;
92 };
93
94 /* UST trace representation */
95 struct ltt_ust_trace {
96 struct cds_list_head list;
97 char name[NAME_MAX];
98 int shmid;
99 pid_t pid;
100 struct cds_list_head markers;
101 };
102
103 struct ltt_ust_marker {
104 struct cds_list_head list;
105 char *name;
106 char *channel;
107 };
108
109 struct ltt_kernel_event *get_kernel_event_by_name(
110 char *name, struct ltt_kernel_channel *channel);
111 struct ltt_kernel_channel *get_kernel_channel_by_name(
112 char *name, struct ltt_kernel_session *session);
113
114 /*
115 * Create functions malloc() the data structure.
116 */
117 struct ltt_kernel_session *trace_create_kernel_session(void);
118 struct ltt_kernel_channel *trace_create_kernel_channel(struct lttng_channel *chan, char *path);
119 struct ltt_kernel_event *trace_create_kernel_event(struct lttng_event *ev);
120 struct ltt_kernel_metadata *trace_create_kernel_metadata(char *path);
121 struct ltt_kernel_stream *trace_create_kernel_stream(void);
122
123 /*
124 * Destroy functions free() the data structure and remove from linked list if
125 * it's applies.
126 */
127 void trace_destroy_kernel_session(struct ltt_kernel_session *session);
128 void trace_destroy_kernel_metadata(struct ltt_kernel_metadata *metadata);
129 void trace_destroy_kernel_channel(struct ltt_kernel_channel *channel);
130 void trace_destroy_kernel_event(struct ltt_kernel_event *event);
131 void trace_destroy_kernel_stream(struct ltt_kernel_stream *stream);
132
133 #endif /* _LTT_TRACE_H */
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