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
;
62 struct lttng_userspace_probe_location
*userspace_probe_location
;
66 struct ltt_kernel_channel
{
68 uint64_t key
; /* Key to reference this channel with the consumer. */
70 unsigned int stream_count
;
71 unsigned int event_count
;
72 bool published_to_notification_thread
;
73 struct cds_list_head ctx_list
;
74 struct lttng_channel
*channel
;
75 struct ltt_kernel_event_list events_list
;
76 struct ltt_kernel_stream_list stream_list
;
77 struct cds_list_head list
;
78 /* Session pointer which has a reference to this object. */
79 struct ltt_kernel_session
*session
;
80 bool sent_to_consumer
;
84 struct ltt_kernel_metadata
{
86 uint64_t key
; /* Key to reference this channel with the consumer. */
87 struct lttng_channel
*conf
;
91 struct ltt_kernel_stream
{
95 bool sent_to_consumer
;
96 /* Format is %s_%d respectively channel name and CPU number. */
97 char name
[DEFAULT_STREAM_NAME_LEN
];
98 uint64_t tracefile_size
;
99 uint64_t tracefile_count
;
100 struct cds_list_head list
;
104 struct ltt_kernel_session
{
106 int metadata_stream_fd
;
107 int consumer_fds_sent
;
108 unsigned int channel_count
;
109 unsigned int stream_count_global
;
110 struct ltt_kernel_metadata
*metadata
;
111 struct ltt_kernel_channel_list channel_list
;
112 /* UID/GID of the user owning the session */
115 struct consumer_output
*consumer
;
116 /* Tracing session id */
118 /* Session is active or not meaning it has been started or stopped. */
119 unsigned int active
:1;
120 /* Tell or not if the session has to output the traces. */
121 unsigned int output_traces
;
122 unsigned int snapshot_mode
;
123 unsigned int has_non_default_channel
;
124 /* Current trace chunk of the ltt_session. */
125 struct lttng_trace_chunk
*current_trace_chunk
;
127 struct lttng_tracker_list
*tracker_list_pid
;
128 struct lttng_tracker_list
*tracker_list_vpid
;
129 struct lttng_tracker_list
*tracker_list_uid
;
130 struct lttng_tracker_list
*tracker_list_vuid
;
131 struct lttng_tracker_list
*tracker_list_gid
;
132 struct lttng_tracker_list
*tracker_list_vgid
;
136 * Lookup functions. NULL is returned if not found.
138 struct ltt_kernel_event
*trace_kernel_get_event_by_name(
139 char *name
, struct ltt_kernel_channel
*channel
,
140 enum lttng_event_type type
);
141 struct ltt_kernel_event
*trace_kernel_find_event(
142 char *name
, struct ltt_kernel_channel
*channel
,
143 enum lttng_event_type type
,
144 struct lttng_filter_bytecode
*filter
);
145 struct ltt_kernel_channel
*trace_kernel_get_channel_by_name(
146 const char *name
, struct ltt_kernel_session
*session
);
149 * Create functions malloc() the data structure.
151 struct ltt_kernel_session
*trace_kernel_create_session(void);
152 struct ltt_kernel_channel
*trace_kernel_create_channel(
153 struct lttng_channel
*chan
);
154 enum lttng_error_code
trace_kernel_create_event(struct lttng_event
*ev
,
155 char *filter_expression
, struct lttng_filter_bytecode
*filter
,
156 struct ltt_kernel_event
**kernel_event
);
157 struct ltt_kernel_metadata
*trace_kernel_create_metadata(void);
158 struct ltt_kernel_stream
*trace_kernel_create_stream(const char *name
,
160 struct ltt_kernel_context
*trace_kernel_create_context(
161 struct lttng_kernel_context
*ctx
);
162 struct ltt_kernel_context
*trace_kernel_copy_context(
163 struct ltt_kernel_context
*ctx
);
166 * Destroy functions free() the data structure and remove from linked list if
169 void trace_kernel_destroy_session(struct ltt_kernel_session
*session
);
170 void trace_kernel_destroy_metadata(struct ltt_kernel_metadata
*metadata
);
171 void trace_kernel_destroy_channel(struct ltt_kernel_channel
*channel
);
172 void trace_kernel_destroy_event(struct ltt_kernel_event
*event
);
173 void trace_kernel_destroy_stream(struct ltt_kernel_stream
*stream
);
174 void trace_kernel_destroy_context(struct ltt_kernel_context
*ctx
);
175 void trace_kernel_free_session(struct ltt_kernel_session
*session
);
177 #endif /* _LTT_TRACE_KERNEL_H */