2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License, version 2 only,
6 * as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 #ifndef _LTT_TRACE_KERNEL_H
19 #define _LTT_TRACE_KERNEL_H
21 #include <urcu/list.h>
23 #include <lttng/lttng.h>
24 #include <common/lttng-kernel.h>
25 #include <common/lttng-kernel-old.h>
26 #include <common/defaults.h>
30 /* Kernel event list */
31 struct ltt_kernel_event_list
{
32 struct cds_list_head head
;
35 /* Channel stream list */
36 struct ltt_kernel_stream_list
{
37 struct cds_list_head head
;
41 struct ltt_kernel_channel_list
{
42 struct cds_list_head head
;
46 struct ltt_kernel_event
{
49 struct lttng_kernel_event
*event
;
50 struct cds_list_head list
;
54 struct ltt_kernel_channel
{
57 unsigned int stream_count
;
58 unsigned int event_count
;
60 * TODO: need internal representation to support more than a
63 struct lttng_kernel_context
*ctx
;
64 struct lttng_channel
*channel
;
65 struct ltt_kernel_event_list events_list
;
66 struct ltt_kernel_stream_list stream_list
;
67 struct cds_list_head list
;
68 /* Session pointer which has a reference to this object. */
69 struct ltt_kernel_session
*session
;
73 struct ltt_kernel_metadata
{
75 struct lttng_channel
*conf
;
79 struct ltt_kernel_stream
{
82 /* Format is %s_%d respectively channel name and CPU number. */
83 char name
[DEFAULT_STREAM_NAME_LEN
];
84 struct cds_list_head list
;
88 struct ltt_kernel_session
{
90 int metadata_stream_fd
;
91 int consumer_fds_sent
;
92 unsigned int channel_count
;
93 unsigned int stream_count_global
;
95 struct ltt_kernel_metadata
*metadata
;
96 struct ltt_kernel_channel_list channel_list
;
97 /* UID/GID of the user owning the session */
101 * Two consumer_output object are needed where one is needed for the
102 * current output object and the second one is the temporary object used to
103 * store URI being set by the lttng_set_consumer_uri call. Once
104 * lttng_enable_consumer is called, the two pointers are swapped.
106 struct consumer_output
*consumer
;
107 struct consumer_output
*tmp_consumer
;
108 /* Tracing session id */
110 /* Session is started and active */
111 unsigned int started
;
115 * Lookup functions. NULL is returned if not found.
117 struct ltt_kernel_event
*trace_kernel_get_event_by_name(
118 char *name
, struct ltt_kernel_channel
*channel
);
119 struct ltt_kernel_channel
*trace_kernel_get_channel_by_name(
120 char *name
, struct ltt_kernel_session
*session
);
123 * Create functions malloc() the data structure.
125 struct ltt_kernel_session
*trace_kernel_create_session(char *path
);
126 struct ltt_kernel_channel
*trace_kernel_create_channel(
127 struct lttng_channel
*chan
);
128 struct ltt_kernel_event
*trace_kernel_create_event(struct lttng_event
*ev
);
129 struct ltt_kernel_metadata
*trace_kernel_create_metadata(void);
130 struct ltt_kernel_stream
*trace_kernel_create_stream(const char *name
,
134 * Destroy functions free() the data structure and remove from linked list if
137 void trace_kernel_destroy_session(struct ltt_kernel_session
*session
);
138 void trace_kernel_destroy_metadata(struct ltt_kernel_metadata
*metadata
);
139 void trace_kernel_destroy_channel(struct ltt_kernel_channel
*channel
);
140 void trace_kernel_destroy_event(struct ltt_kernel_event
*event
);
141 void trace_kernel_destroy_stream(struct ltt_kernel_stream
*stream
);
143 #endif /* _LTT_TRACE_KERNEL_H */