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
{
83 /* Format is %s_%d respectively channel name and CPU number. */
84 char name
[DEFAULT_STREAM_NAME_LEN
];
85 uint64_t tracefile_size
;
86 uint64_t tracefile_count
;
87 struct cds_list_head list
;
91 struct ltt_kernel_session
{
93 int metadata_stream_fd
;
94 int consumer_fds_sent
;
95 unsigned int channel_count
;
96 unsigned int stream_count_global
;
97 struct ltt_kernel_metadata
*metadata
;
98 struct ltt_kernel_channel_list channel_list
;
99 /* UID/GID of the user owning the session */
103 * Two consumer_output object are needed where one is needed for the
104 * current output object and the second one is the temporary object used to
105 * store URI being set by the lttng_set_consumer_uri call. Once
106 * lttng_enable_consumer is called, the two pointers are swapped.
108 struct consumer_output
*consumer
;
109 struct consumer_output
*tmp_consumer
;
110 /* Tracing session id */
112 /* Session is started and active */
113 unsigned int started
;
114 /* Tell or not if the session has to output the traces. */
115 unsigned int output_traces
;
116 unsigned int snapshot_mode
;
117 unsigned int has_non_default_channel
;
121 * Lookup functions. NULL is returned if not found.
123 struct ltt_kernel_event
*trace_kernel_get_event_by_name(
124 char *name
, struct ltt_kernel_channel
*channel
);
125 struct ltt_kernel_channel
*trace_kernel_get_channel_by_name(
126 char *name
, struct ltt_kernel_session
*session
);
129 * Create functions malloc() the data structure.
131 struct ltt_kernel_session
*trace_kernel_create_session(void);
132 struct ltt_kernel_channel
*trace_kernel_create_channel(
133 struct lttng_channel
*chan
);
134 struct ltt_kernel_event
*trace_kernel_create_event(struct lttng_event
*ev
);
135 struct ltt_kernel_metadata
*trace_kernel_create_metadata(void);
136 struct ltt_kernel_stream
*trace_kernel_create_stream(const char *name
,
140 * Destroy functions free() the data structure and remove from linked list if
143 void trace_kernel_destroy_session(struct ltt_kernel_session
*session
);
144 void trace_kernel_destroy_metadata(struct ltt_kernel_metadata
*metadata
);
145 void trace_kernel_destroy_channel(struct ltt_kernel_channel
*channel
);
146 void trace_kernel_destroy_event(struct ltt_kernel_event
*event
);
147 void trace_kernel_destroy_stream(struct ltt_kernel_stream
*stream
);
149 #endif /* _LTT_TRACE_KERNEL_H */