2 * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
4 * SPDX-License-Identifier: GPL-2.0-only
8 #ifndef _LTT_TRACE_KERNEL_H
9 #define _LTT_TRACE_KERNEL_H
11 #include <urcu/list.h>
13 #include <lttng/lttng.h>
14 #include <common/lttng-kernel.h>
15 #include <common/lttng-kernel-old.h>
16 #include <common/defaults.h>
21 /* Kernel event list */
22 struct ltt_kernel_event_list
{
23 struct cds_list_head head
;
26 /* Kernel event rule token list */
27 struct ltt_kernel_token_event_rule_ht
{
31 /* Channel stream list */
32 struct ltt_kernel_stream_list
{
33 struct cds_list_head head
;
37 struct ltt_kernel_channel_list
{
38 struct cds_list_head head
;
41 struct ltt_kernel_context
{
42 struct lttng_kernel_context ctx
;
43 struct cds_list_head list
;
44 /* Indicates whether or not the context is in a list. */
49 struct ltt_kernel_event
{
52 enum lttng_event_type type
;
53 struct lttng_kernel_event
*event
;
54 struct cds_list_head list
;
55 char *filter_expression
;
56 struct lttng_bytecode
*filter
;
57 struct lttng_userspace_probe_location
*userspace_probe_location
;
61 struct ltt_kernel_token_event_rule
{
63 uint64_t error_counter_index
;
65 enum lttng_event_type type
;
66 struct lttng_trigger
*trigger
;
68 const struct lttng_bytecode
*filter
;
69 struct lttng_userspace_probe_location
*userspace_probe_location
;
70 struct cds_lfht_node ht_node
;
74 struct ltt_kernel_channel
{
76 uint64_t key
; /* Key to reference this channel with the consumer. */
78 unsigned int stream_count
;
79 unsigned int event_count
;
80 bool published_to_notification_thread
;
81 struct cds_list_head ctx_list
;
82 struct lttng_channel
*channel
;
83 struct ltt_kernel_event_list events_list
;
84 struct ltt_kernel_stream_list stream_list
;
85 struct cds_list_head list
;
86 /* Session pointer which has a reference to this object. */
87 struct ltt_kernel_session
*session
;
88 bool sent_to_consumer
;
92 struct ltt_kernel_metadata
{
94 uint64_t key
; /* Key to reference this channel with the consumer. */
95 struct lttng_channel
*conf
;
99 struct ltt_kernel_stream
{
103 bool sent_to_consumer
;
104 /* Format is %s_%d respectively channel name and CPU number. */
105 char name
[DEFAULT_STREAM_NAME_LEN
];
106 uint64_t tracefile_size
;
107 uint64_t tracefile_count
;
108 struct cds_list_head list
;
112 struct ltt_kernel_session
{
114 int metadata_stream_fd
;
115 int consumer_fds_sent
;
116 unsigned int channel_count
;
117 unsigned int stream_count_global
;
118 struct ltt_kernel_metadata
*metadata
;
119 struct ltt_kernel_channel_list channel_list
;
120 /* UID/GID of the user owning the session */
123 struct consumer_output
*consumer
;
124 /* Tracing session id */
126 /* Session is active or not meaning it has been started or stopped. */
127 unsigned int active
:1;
128 /* Tell or not if the session has to output the traces. */
129 unsigned int output_traces
;
130 unsigned int snapshot_mode
;
131 unsigned int has_non_default_channel
;
132 bool is_live_session
;
133 /* Current trace chunk of the ltt_session. */
134 struct lttng_trace_chunk
*current_trace_chunk
;
136 struct process_attr_tracker
*tracker_pid
;
137 struct process_attr_tracker
*tracker_vpid
;
138 struct process_attr_tracker
*tracker_uid
;
139 struct process_attr_tracker
*tracker_vuid
;
140 struct process_attr_tracker
*tracker_gid
;
141 struct process_attr_tracker
*tracker_vgid
;
145 * Lookup functions. NULL is returned if not found.
147 struct ltt_kernel_event
*trace_kernel_get_event_by_name(
148 char *name
, struct ltt_kernel_channel
*channel
,
149 enum lttng_event_type type
);
150 struct ltt_kernel_event
*trace_kernel_find_event(
151 char *name
, struct ltt_kernel_channel
*channel
,
152 enum lttng_event_type type
,
153 struct lttng_bytecode
*filter
);
154 struct ltt_kernel_channel
*trace_kernel_get_channel_by_name(
155 const char *name
, struct ltt_kernel_session
*session
);
158 * Create functions malloc() the data structure.
160 struct ltt_kernel_session
*trace_kernel_create_session(void);
161 struct ltt_kernel_channel
*trace_kernel_create_channel(
162 struct lttng_channel
*chan
);
163 enum lttng_error_code
trace_kernel_create_event(struct lttng_event
*ev
,
164 char *filter_expression
, struct lttng_bytecode
*filter
,
165 struct ltt_kernel_event
**kernel_event
);
166 struct ltt_kernel_metadata
*trace_kernel_create_metadata(void);
167 struct ltt_kernel_stream
*trace_kernel_create_stream(const char *name
,
169 struct ltt_kernel_context
*trace_kernel_create_context(
170 struct lttng_kernel_context
*ctx
);
171 enum lttng_error_code
trace_kernel_create_token_event_rule(
172 struct lttng_trigger
*trigger
,
174 uint64_t trigger_error_counter_index
,
175 struct ltt_kernel_token_event_rule
**kernel_token_event_rule
);
176 struct ltt_kernel_context
*trace_kernel_copy_context(
177 struct ltt_kernel_context
*ctx
);
178 enum lttng_error_code
trace_kernel_init_trigger_from_event_rule(const struct lttng_event_rule
*rule
,
179 struct lttng_kernel_trigger
*kernel_trigger
);
182 * Destroy functions free() the data structure and remove from linked list if
185 void trace_kernel_destroy_session(struct ltt_kernel_session
*session
);
186 void trace_kernel_destroy_metadata(struct ltt_kernel_metadata
*metadata
);
187 void trace_kernel_destroy_channel(struct ltt_kernel_channel
*channel
);
188 void trace_kernel_destroy_event(struct ltt_kernel_event
*event
);
189 void trace_kernel_destroy_stream(struct ltt_kernel_stream
*stream
);
190 void trace_kernel_destroy_context(struct ltt_kernel_context
*ctx
);
191 void trace_kernel_destroy_token_event_rule(struct ltt_kernel_token_event_rule
*rule
);
192 void trace_kernel_free_session(struct ltt_kernel_session
*session
);
194 #endif /* _LTT_TRACE_KERNEL_H */