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>
31 /* Kernel event list */
32 struct ltt_kernel_event_list
{
33 struct cds_list_head head
;
36 /* Channel stream list */
37 struct ltt_kernel_stream_list
{
38 struct cds_list_head head
;
42 struct ltt_kernel_channel_list
{
43 struct cds_list_head head
;
46 struct ltt_kernel_context
{
47 struct lttng_kernel_context ctx
;
48 struct cds_list_head list
;
49 /* Indicates whether or not the context is in a list. */
54 struct ltt_kernel_event
{
57 enum lttng_event_type type
;
58 struct lttng_kernel_event
*event
;
59 struct cds_list_head list
;
60 char *filter_expression
;
61 struct lttng_filter_bytecode
*filter
;
65 struct ltt_kernel_channel
{
67 uint64_t key
; /* Key to reference this channel with the consumer. */
69 unsigned int stream_count
;
70 unsigned int event_count
;
71 bool published_to_notification_thread
;
72 struct cds_list_head ctx_list
;
73 struct lttng_channel
*channel
;
74 struct ltt_kernel_event_list events_list
;
75 struct ltt_kernel_stream_list stream_list
;
76 struct cds_list_head list
;
77 /* Session pointer which has a reference to this object. */
78 struct ltt_kernel_session
*session
;
79 bool sent_to_consumer
;
83 struct ltt_kernel_metadata
{
85 uint64_t key
; /* Key to reference this channel with the consumer. */
86 struct lttng_channel
*conf
;
90 struct ltt_kernel_stream
{
94 bool sent_to_consumer
;
95 /* Format is %s_%d respectively channel name and CPU number. */
96 char name
[DEFAULT_STREAM_NAME_LEN
];
97 uint64_t tracefile_size
;
98 uint64_t tracefile_count
;
99 struct cds_list_head list
;
103 struct ltt_kernel_session
{
105 int metadata_stream_fd
;
106 int consumer_fds_sent
;
107 unsigned int channel_count
;
108 unsigned int stream_count_global
;
109 struct ltt_kernel_metadata
*metadata
;
110 struct ltt_kernel_channel_list channel_list
;
111 /* UID/GID of the user owning the session */
114 struct consumer_output
*consumer
;
115 /* Tracing session id */
117 /* Session is active or not meaning it has been started or stopped. */
118 unsigned int active
:1;
119 /* Tell or not if the session has to output the traces. */
120 unsigned int output_traces
;
121 unsigned int snapshot_mode
;
122 unsigned int has_non_default_channel
;
124 struct lttng_tracker_list
*tracker_list_pid
;
125 struct lttng_tracker_list
*tracker_list_vpid
;
126 struct lttng_tracker_list
*tracker_list_uid
;
127 struct lttng_tracker_list
*tracker_list_vuid
;
128 struct lttng_tracker_list
*tracker_list_gid
;
129 struct lttng_tracker_list
*tracker_list_vgid
;
133 * Lookup functions. NULL is returned if not found.
135 struct ltt_kernel_event
*trace_kernel_get_event_by_name(
136 char *name
, struct ltt_kernel_channel
*channel
,
137 enum lttng_event_type type
);
138 struct ltt_kernel_event
*trace_kernel_find_event(
139 char *name
, struct ltt_kernel_channel
*channel
,
140 enum lttng_event_type type
,
141 struct lttng_filter_bytecode
*filter
);
142 struct ltt_kernel_channel
*trace_kernel_get_channel_by_name(
143 char *name
, struct ltt_kernel_session
*session
);
146 * Create functions malloc() the data structure.
148 struct ltt_kernel_session
*trace_kernel_create_session(void);
149 struct ltt_kernel_channel
*trace_kernel_create_channel(
150 struct lttng_channel
*chan
);
151 struct ltt_kernel_event
*trace_kernel_create_event(struct lttng_event
*ev
,
152 char *filter_expression
, struct lttng_filter_bytecode
*filter
);
153 struct ltt_kernel_metadata
*trace_kernel_create_metadata(void);
154 struct ltt_kernel_stream
*trace_kernel_create_stream(const char *name
,
156 struct ltt_kernel_context
*trace_kernel_create_context(
157 struct lttng_kernel_context
*ctx
);
158 struct ltt_kernel_context
*trace_kernel_copy_context(
159 struct ltt_kernel_context
*ctx
);
162 * Destroy functions free() the data structure and remove from linked list if
165 void trace_kernel_destroy_session(struct ltt_kernel_session
*session
);
166 void trace_kernel_destroy_metadata(struct ltt_kernel_metadata
*metadata
);
167 void trace_kernel_destroy_channel(struct ltt_kernel_channel
*channel
);
168 void trace_kernel_destroy_event(struct ltt_kernel_event
*event
);
169 void trace_kernel_destroy_stream(struct ltt_kernel_stream
*stream
);
170 void trace_kernel_destroy_context(struct ltt_kernel_context
*ctx
);
172 #endif /* _LTT_TRACE_KERNEL_H */