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
;
48 /* Indicates whether or not the context is in a list. */
53 struct ltt_kernel_event
{
56 enum lttng_event_type type
;
57 struct lttng_kernel_event
*event
;
58 struct cds_list_head list
;
59 char *filter_expression
;
60 struct lttng_filter_bytecode
*filter
;
64 struct ltt_kernel_channel
{
66 uint64_t key
; /* Key to reference this channel with the consumer. */
68 unsigned int stream_count
;
69 unsigned int event_count
;
70 bool published_to_notification_thread
;
71 struct cds_list_head ctx_list
;
72 struct lttng_channel
*channel
;
73 struct ltt_kernel_event_list events_list
;
74 struct ltt_kernel_stream_list stream_list
;
75 struct cds_list_head list
;
76 /* Session pointer which has a reference to this object. */
77 struct ltt_kernel_session
*session
;
78 bool sent_to_consumer
;
82 struct ltt_kernel_metadata
{
84 uint64_t key
; /* Key to reference this channel with the consumer. */
85 struct lttng_channel
*conf
;
89 struct ltt_kernel_stream
{
93 bool sent_to_consumer
;
94 /* Format is %s_%d respectively channel name and CPU number. */
95 char name
[DEFAULT_STREAM_NAME_LEN
];
96 uint64_t tracefile_size
;
97 uint64_t tracefile_count
;
98 struct cds_list_head list
;
102 struct ltt_kernel_session
{
104 int metadata_stream_fd
;
105 int consumer_fds_sent
;
106 unsigned int channel_count
;
107 unsigned int stream_count_global
;
108 struct ltt_kernel_metadata
*metadata
;
109 struct ltt_kernel_channel_list channel_list
;
110 /* UID/GID of the user owning the session */
113 struct consumer_output
*consumer
;
114 /* Tracing session id */
116 /* Session is active or not meaning it has been started or stopped. */
117 unsigned int active
:1;
118 /* Tell or not if the session has to output the traces. */
119 unsigned int output_traces
;
120 unsigned int snapshot_mode
;
121 unsigned int has_non_default_channel
;
125 * Lookup functions. NULL is returned if not found.
127 struct ltt_kernel_event
*trace_kernel_get_event_by_name(
128 char *name
, struct ltt_kernel_channel
*channel
,
129 enum lttng_event_type type
);
130 struct ltt_kernel_event
*trace_kernel_find_event(
131 char *name
, struct ltt_kernel_channel
*channel
,
132 enum lttng_event_type type
,
133 struct lttng_filter_bytecode
*filter
);
134 struct ltt_kernel_channel
*trace_kernel_get_channel_by_name(
135 char *name
, struct ltt_kernel_session
*session
);
138 * Create functions malloc() the data structure.
140 struct ltt_kernel_session
*trace_kernel_create_session(void);
141 struct ltt_kernel_channel
*trace_kernel_create_channel(
142 struct lttng_channel
*chan
);
143 struct ltt_kernel_event
*trace_kernel_create_event(struct lttng_event
*ev
,
144 char *filter_expression
, struct lttng_filter_bytecode
*filter
);
145 struct ltt_kernel_metadata
*trace_kernel_create_metadata(void);
146 struct ltt_kernel_stream
*trace_kernel_create_stream(const char *name
,
148 struct ltt_kernel_context
*trace_kernel_create_context(
149 struct lttng_kernel_context
*ctx
);
150 struct ltt_kernel_context
*trace_kernel_copy_context(
151 struct ltt_kernel_context
*ctx
);
154 * Destroy functions free() the data structure and remove from linked list if
157 void trace_kernel_destroy_session(struct ltt_kernel_session
*session
);
158 void trace_kernel_destroy_metadata(struct ltt_kernel_metadata
*metadata
);
159 void trace_kernel_destroy_channel(struct ltt_kernel_channel
*channel
);
160 void trace_kernel_destroy_event(struct ltt_kernel_event
*event
);
161 void trace_kernel_destroy_stream(struct ltt_kernel_stream
*stream
);
162 void trace_kernel_destroy_context(struct ltt_kernel_context
*ctx
);
164 #endif /* _LTT_TRACE_KERNEL_H */