consumerd: tag metadata channel as being part of a live session
[lttng-tools.git] / src / bin / lttng-sessiond / trace-kernel.h
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fda89c9b 1/*
ab5be9fa 2 * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
fda89c9b 3 *
ab5be9fa 4 * SPDX-License-Identifier: GPL-2.0-only
fda89c9b 5 *
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6 */
7
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8#ifndef _LTT_TRACE_KERNEL_H
9#define _LTT_TRACE_KERNEL_H
fda89c9b 10
9e78d6ae 11#include <urcu/list.h>
d4a2a84a 12
f3ed775e 13#include <lttng/lttng.h>
10a8a223 14#include <common/lttng-kernel.h>
4dbc372b 15#include <common/lttng-kernel-old.h>
ce2a9e76 16#include <common/defaults.h>
54012638 17
00e2e675 18#include "consumer.h"
55c9e7ca 19#include "tracker.h"
00e2e675 20
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21/* Kernel event list */
22struct ltt_kernel_event_list {
23 struct cds_list_head head;
24};
25
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26/* Channel stream list */
27struct ltt_kernel_stream_list {
28 struct cds_list_head head;
29};
30
31/* Channel list */
32struct ltt_kernel_channel_list {
33 struct cds_list_head head;
34};
35
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36struct ltt_kernel_context {
37 struct lttng_kernel_context ctx;
38 struct cds_list_head list;
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39 /* Indicates whether or not the context is in a list. */
40 bool in_list;
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41};
42
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43/* Kernel event */
44struct ltt_kernel_event {
20fe2104 45 int fd;
e953ef25 46 int enabled;
d0ae4ea8 47 enum lttng_event_type type;
f34daff7 48 struct lttng_kernel_event *event;
20fe2104 49 struct cds_list_head list;
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50 char *filter_expression;
51 struct lttng_filter_bytecode *filter;
3c02e545 52 struct lttng_userspace_probe_location *userspace_probe_location;
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53};
54
55/* Kernel channel */
56struct ltt_kernel_channel {
57 int fd;
e1f3997a 58 uint64_t key; /* Key to reference this channel with the consumer. */
d36b8583 59 int enabled;
8c0faa1d 60 unsigned int stream_count;
cbbbb275 61 unsigned int event_count;
753873bf 62 bool published_to_notification_thread;
645328ae 63 struct cds_list_head ctx_list;
f3ed775e 64 struct lttng_channel *channel;
20fe2104 65 struct ltt_kernel_event_list events_list;
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66 struct ltt_kernel_stream_list stream_list;
67 struct cds_list_head list;
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68 /* Session pointer which has a reference to this object. */
69 struct ltt_kernel_session *session;
e99f9447 70 bool sent_to_consumer;
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71};
72
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73/* Metadata */
74struct ltt_kernel_metadata {
75 int fd;
d40f0359 76 uint64_t key; /* Key to reference this channel with the consumer. */
f3ed775e 77 struct lttng_channel *conf;
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78};
79
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80/* Channel stream */
81struct ltt_kernel_stream {
82 int fd;
8c0faa1d 83 int state;
ffe60014 84 int cpu;
6986ab9b 85 bool sent_to_consumer;
00e2e675 86 /* Format is %s_%d respectively channel name and CPU number. */
ce2a9e76 87 char name[DEFAULT_STREAM_NAME_LEN];
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88 uint64_t tracefile_size;
89 uint64_t tracefile_count;
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90 struct cds_list_head list;
91};
92
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93/* Kernel session */
94struct ltt_kernel_session {
95 int fd;
8c0faa1d 96 int metadata_stream_fd;
3bd1e081 97 int consumer_fds_sent;
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98 unsigned int channel_count;
99 unsigned int stream_count_global;
aaf26714 100 struct ltt_kernel_metadata *metadata;
8c0faa1d 101 struct ltt_kernel_channel_list channel_list;
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102 /* UID/GID of the user owning the session */
103 uid_t uid;
104 gid_t gid;
00e2e675 105 struct consumer_output *consumer;
53632229 106 /* Tracing session id */
d022620a 107 uint64_t id;
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108 /* Session is active or not meaning it has been started or stopped. */
109 unsigned int active:1;
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110 /* Tell or not if the session has to output the traces. */
111 unsigned int output_traces;
27babd3a 112 unsigned int snapshot_mode;
85076754 113 unsigned int has_non_default_channel;
a2814ea7 114 bool is_live_session;
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115 /* Current trace chunk of the ltt_session. */
116 struct lttng_trace_chunk *current_trace_chunk;
55c9e7ca 117 /* Tracker lists */
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118 struct process_attr_tracker *tracker_pid;
119 struct process_attr_tracker *tracker_vpid;
120 struct process_attr_tracker *tracker_uid;
121 struct process_attr_tracker *tracker_vuid;
122 struct process_attr_tracker *tracker_gid;
123 struct process_attr_tracker *tracker_vgid;
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124};
125
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126/*
127 * Lookup functions. NULL is returned if not found.
128 */
129struct ltt_kernel_event *trace_kernel_get_event_by_name(
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130 char *name, struct ltt_kernel_channel *channel,
131 enum lttng_event_type type);
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132struct ltt_kernel_event *trace_kernel_find_event(
133 char *name, struct ltt_kernel_channel *channel,
134 enum lttng_event_type type,
135 struct lttng_filter_bytecode *filter);
62499ad6 136struct ltt_kernel_channel *trace_kernel_get_channel_by_name(
df4f5a87 137 const char *name, struct ltt_kernel_session *session);
19e70852 138
54012638 139/*
c363b55d 140 * Create functions malloc() the data structure.
54012638 141 */
dec56f6c 142struct ltt_kernel_session *trace_kernel_create_session(void);
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143struct ltt_kernel_channel *trace_kernel_create_channel(
144 struct lttng_channel *chan);
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145enum lttng_error_code trace_kernel_create_event(struct lttng_event *ev,
146 char *filter_expression, struct lttng_filter_bytecode *filter,
147 struct ltt_kernel_event **kernel_event);
a4b92340 148struct ltt_kernel_metadata *trace_kernel_create_metadata(void);
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149struct ltt_kernel_stream *trace_kernel_create_stream(const char *name,
150 unsigned int count);
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151struct ltt_kernel_context *trace_kernel_create_context(
152 struct lttng_kernel_context *ctx);
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153struct ltt_kernel_context *trace_kernel_copy_context(
154 struct ltt_kernel_context *ctx);
54012638 155
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156/*
157 * Destroy functions free() the data structure and remove from linked list if
158 * it's applies.
159 */
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160void trace_kernel_destroy_session(struct ltt_kernel_session *session);
161void trace_kernel_destroy_metadata(struct ltt_kernel_metadata *metadata);
162void trace_kernel_destroy_channel(struct ltt_kernel_channel *channel);
163void trace_kernel_destroy_event(struct ltt_kernel_event *event);
164void trace_kernel_destroy_stream(struct ltt_kernel_stream *stream);
645328ae 165void trace_kernel_destroy_context(struct ltt_kernel_context *ctx);
d070c424 166void trace_kernel_free_session(struct ltt_kernel_session *session);
c363b55d 167
62499ad6 168#endif /* _LTT_TRACE_KERNEL_H */
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