Tests: Fix: arm64 use sys_openat instead of sys_open
[lttng-tools.git] / src / bin / lttng-sessiond / trace-kernel.h
... / ...
CommitLineData
1/*
2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
3 *
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.
7 *
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.
12 *
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.
16 */
17
18#ifndef _LTT_TRACE_KERNEL_H
19#define _LTT_TRACE_KERNEL_H
20
21#include <urcu/list.h>
22
23#include <lttng/lttng.h>
24#include <common/lttng-kernel.h>
25#include <common/lttng-kernel-old.h>
26#include <common/defaults.h>
27
28#include "consumer.h"
29
30/* Kernel event list */
31struct ltt_kernel_event_list {
32 struct cds_list_head head;
33};
34
35/* Channel stream list */
36struct ltt_kernel_stream_list {
37 struct cds_list_head head;
38};
39
40/* Channel list */
41struct ltt_kernel_channel_list {
42 struct cds_list_head head;
43};
44
45struct 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. */
49 bool in_list;
50};
51
52/* Kernel event */
53struct ltt_kernel_event {
54 int fd;
55 int enabled;
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;
61};
62
63/* Kernel channel */
64struct ltt_kernel_channel {
65 int fd;
66 int enabled;
67 unsigned int stream_count;
68 unsigned int event_count;
69 bool published_to_notification_thread;
70 struct cds_list_head ctx_list;
71 struct lttng_channel *channel;
72 struct ltt_kernel_event_list events_list;
73 struct ltt_kernel_stream_list stream_list;
74 struct cds_list_head list;
75 /* Session pointer which has a reference to this object. */
76 struct ltt_kernel_session *session;
77 bool sent_to_consumer;
78};
79
80/* Metadata */
81struct ltt_kernel_metadata {
82 int fd;
83 struct lttng_channel *conf;
84};
85
86/* Channel stream */
87struct ltt_kernel_stream {
88 int fd;
89 int state;
90 int cpu;
91 bool sent_to_consumer;
92 /* Format is %s_%d respectively channel name and CPU number. */
93 char name[DEFAULT_STREAM_NAME_LEN];
94 uint64_t tracefile_size;
95 uint64_t tracefile_count;
96 struct cds_list_head list;
97};
98
99/* Kernel session */
100struct ltt_kernel_session {
101 int fd;
102 int metadata_stream_fd;
103 int consumer_fds_sent;
104 unsigned int channel_count;
105 unsigned int stream_count_global;
106 struct ltt_kernel_metadata *metadata;
107 struct ltt_kernel_channel_list channel_list;
108 /* UID/GID of the user owning the session */
109 uid_t uid;
110 gid_t gid;
111 struct consumer_output *consumer;
112 /* Tracing session id */
113 uint64_t id;
114 /* Session is active or not meaning it has been started or stopped. */
115 unsigned int active:1;
116 /* Tell or not if the session has to output the traces. */
117 unsigned int output_traces;
118 unsigned int snapshot_mode;
119 unsigned int has_non_default_channel;
120};
121
122/*
123 * Lookup functions. NULL is returned if not found.
124 */
125struct ltt_kernel_event *trace_kernel_get_event_by_name(
126 char *name, struct ltt_kernel_channel *channel,
127 enum lttng_event_type type);
128struct ltt_kernel_event *trace_kernel_find_event(
129 char *name, struct ltt_kernel_channel *channel,
130 enum lttng_event_type type,
131 struct lttng_filter_bytecode *filter);
132struct ltt_kernel_channel *trace_kernel_get_channel_by_name(
133 char *name, struct ltt_kernel_session *session);
134
135/*
136 * Create functions malloc() the data structure.
137 */
138struct ltt_kernel_session *trace_kernel_create_session(void);
139struct ltt_kernel_channel *trace_kernel_create_channel(
140 struct lttng_channel *chan);
141struct ltt_kernel_event *trace_kernel_create_event(struct lttng_event *ev,
142 char *filter_expression, struct lttng_filter_bytecode *filter);
143struct ltt_kernel_metadata *trace_kernel_create_metadata(void);
144struct ltt_kernel_stream *trace_kernel_create_stream(const char *name,
145 unsigned int count);
146struct ltt_kernel_context *trace_kernel_create_context(
147 struct lttng_kernel_context *ctx);
148struct ltt_kernel_context *trace_kernel_copy_context(
149 struct ltt_kernel_context *ctx);
150
151/*
152 * Destroy functions free() the data structure and remove from linked list if
153 * it's applies.
154 */
155void trace_kernel_destroy_session(struct ltt_kernel_session *session);
156void trace_kernel_destroy_metadata(struct ltt_kernel_metadata *metadata);
157void trace_kernel_destroy_channel(struct ltt_kernel_channel *channel);
158void trace_kernel_destroy_event(struct ltt_kernel_event *event);
159void trace_kernel_destroy_stream(struct ltt_kernel_stream *stream);
160void trace_kernel_destroy_context(struct ltt_kernel_context *ctx);
161
162#endif /* _LTT_TRACE_KERNEL_H */
This page took 0.026228 seconds and 4 git commands to generate.