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
;
45 struct ltt_kernel_context
{
46 struct lttng_kernel_context ctx
;
47 struct cds_list_head list
;
51 struct ltt_kernel_event
{
54 enum lttng_event_type type
;
55 struct lttng_kernel_event
*event
;
56 struct cds_list_head list
;
57 char *filter_expression
;
58 struct lttng_filter_bytecode
*filter
;
62 struct ltt_kernel_channel
{
65 unsigned int stream_count
;
66 unsigned int event_count
;
67 struct cds_list_head ctx_list
;
68 struct lttng_channel
*channel
;
69 struct ltt_kernel_event_list events_list
;
70 struct ltt_kernel_stream_list stream_list
;
71 struct cds_list_head list
;
72 /* Session pointer which has a reference to this object. */
73 struct ltt_kernel_session
*session
;
77 struct ltt_kernel_metadata
{
79 struct lttng_channel
*conf
;
83 struct ltt_kernel_stream
{
87 /* Format is %s_%d respectively channel name and CPU number. */
88 char name
[DEFAULT_STREAM_NAME_LEN
];
89 uint64_t tracefile_size
;
90 uint64_t tracefile_count
;
91 struct cds_list_head list
;
95 struct ltt_kernel_session
{
97 int metadata_stream_fd
;
98 int consumer_fds_sent
;
99 unsigned int channel_count
;
100 unsigned int stream_count_global
;
101 struct ltt_kernel_metadata
*metadata
;
102 struct ltt_kernel_channel_list channel_list
;
103 /* UID/GID of the user owning the session */
106 struct consumer_output
*consumer
;
107 /* Tracing session id */
109 /* Session is active or not meaning it has been started or stopped. */
110 unsigned int active
:1;
111 /* Tell or not if the session has to output the traces. */
112 unsigned int output_traces
;
113 unsigned int snapshot_mode
;
114 unsigned int has_non_default_channel
;
118 * Lookup functions. NULL is returned if not found.
120 struct ltt_kernel_event
*trace_kernel_get_event_by_name(
121 char *name
, struct ltt_kernel_channel
*channel
,
122 enum lttng_event_type type
);
123 struct ltt_kernel_event
*trace_kernel_find_event(
124 char *name
, struct ltt_kernel_channel
*channel
,
125 enum lttng_event_type type
,
126 struct lttng_filter_bytecode
*filter
);
127 struct ltt_kernel_channel
*trace_kernel_get_channel_by_name(
128 char *name
, struct ltt_kernel_session
*session
);
131 * Create functions malloc() the data structure.
133 struct ltt_kernel_session
*trace_kernel_create_session(void);
134 struct ltt_kernel_channel
*trace_kernel_create_channel(
135 struct lttng_channel
*chan
);
136 struct ltt_kernel_event
*trace_kernel_create_event(struct lttng_event
*ev
,
137 char *filter_expression
, struct lttng_filter_bytecode
*filter
);
138 struct ltt_kernel_metadata
*trace_kernel_create_metadata(void);
139 struct ltt_kernel_stream
*trace_kernel_create_stream(const char *name
,
141 struct ltt_kernel_context
*trace_kernel_create_context(
142 struct lttng_kernel_context
*ctx
);
145 * Destroy functions free() the data structure and remove from linked list if
148 void trace_kernel_destroy_session(struct ltt_kernel_session
*session
);
149 void trace_kernel_destroy_metadata(struct ltt_kernel_metadata
*metadata
);
150 void trace_kernel_destroy_channel(struct ltt_kernel_channel
*channel
);
151 void trace_kernel_destroy_event(struct ltt_kernel_event
*event
);
152 void trace_kernel_destroy_stream(struct ltt_kernel_stream
*stream
);
153 void trace_kernel_destroy_context(struct ltt_kernel_context
*ctx
);
155 #endif /* _LTT_TRACE_KERNEL_H */