Add tracepoint listing for UST
[lttng-tools.git] / lttng-sessiond / trace-ust.h
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1/*
2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; only version 2
7 * of the License.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 */
18
19#ifndef _LTT_TRACE_UST_H
20#define _LTT_TRACE_UST_H
21
3bd1e081 22#include <config.h>
97ee3a89 23#include <limits.h>
f6a9efaa 24#include <urcu.h>
97ee3a89 25#include <urcu/list.h>
97ee3a89 26#include <lttng/lttng.h>
3bd1e081 27
48842b30 28#include "ust-ctl.h"
97ee3a89 29
f6a9efaa 30#include "../hashtable/rculfhash.h"
0177d773 31
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32/* UST Stream list */
33struct ltt_ust_stream_list {
34 unsigned int count;
35 struct cds_list_head head;
36};
37
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38/* Context hash table nodes */
39struct ltt_ust_context {
40 struct lttng_ust_context ctx;
41 struct cds_lfht_node node;
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42};
43
44/* UST event */
45struct ltt_ust_event {
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46 struct lttng_ust_event attr;
47 struct cds_lfht *ctx;
48 struct cds_lfht_node node;
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49};
50
51/* UST stream */
52struct ltt_ust_stream {
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53 int handle;
54 char pathname[PATH_MAX];
13161846 55 struct lttng_ust_object_data *obj;
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56 /* Using a list of streams to keep order. */
57 struct cds_list_head list;
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58};
59
60/* UST channel */
61struct ltt_ust_channel {
44d3bd01 62 char name[LTTNG_UST_SYM_NAME_LEN];
48842b30 63 char pathname[PATH_MAX];
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64 struct lttng_ust_channel attr;
65 struct cds_lfht *ctx;
66 struct cds_lfht *events;
67 struct cds_lfht_node node;
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68};
69
70/* UST Metadata */
71struct ltt_ust_metadata {
72 int handle;
13161846 73 struct lttng_ust_object_data *obj;
f6a9efaa 74 char pathname[PATH_MAX]; /* Trace file path name */
44d3bd01 75 struct lttng_ust_channel attr;
13161846 76 struct lttng_ust_object_data *stream_obj;
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77};
78
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79/* UST domain global (LTTNG_DOMAIN_UST) */
80struct ltt_ust_domain_global {
81 struct cds_lfht *channels;
82};
83
84/* UST domain pid (LTTNG_DOMAIN_UST_PID) */
85struct ltt_ust_domain_pid {
86 pid_t pid;
87 struct cds_lfht *channels;
88 struct cds_lfht_node node;
89};
90
91/* UST domain exec name (LTTNG_DOMAIN_UST_EXEC_NAME) */
92struct ltt_ust_domain_exec {
93 char exec_name[LTTNG_UST_SYM_NAME_LEN];
94 struct cds_lfht *channels;
95 struct cds_lfht_node node;
96};
97
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98/* UST session */
99struct ltt_ust_session {
48842b30 100 int uid; /* Unique identifier of session */
3bd1e081 101 int consumer_fds_sent;
2bdd86d4 102 int consumer_fd;
36dc12cc 103 int start_trace;
48842b30 104 char pathname[PATH_MAX];
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105 struct ltt_ust_domain_global domain_global;
106 /*
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107 * Those two hash tables contains data for a specific UST domain and each
108 * contains a HT of channels. See ltt_ust_domain_exec and
109 * ltt_ust_domain_pid data structures.
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110 */
111 struct cds_lfht *domain_pid;
112 struct cds_lfht *domain_exec;
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113};
114
74d0b642 115#ifdef HAVE_LIBLTTNG_UST_CTL
3bd1e081 116
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117/*
118 * Lookup functions. NULL is returned if not found.
119 */
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120struct ltt_ust_event *trace_ust_find_event_by_name(struct cds_lfht *ht,
121 char *name);
122struct ltt_ust_channel *trace_ust_find_channel_by_name(struct cds_lfht *ht,
123 char *name);
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124
125/*
126 * Create functions malloc() the data structure.
127 */
48842b30 128struct ltt_ust_session *trace_ust_create_session(char *path, unsigned int uid,
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129 struct lttng_domain *domain);
130struct ltt_ust_channel *trace_ust_create_channel(struct lttng_channel *attr,
131 char *path);
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132struct ltt_ust_event *trace_ust_create_event(struct lttng_event *ev);
133struct ltt_ust_metadata *trace_ust_create_metadata(char *path);
134
135/*
136 * Destroy functions free() the data structure and remove from linked list if
137 * it's applies.
138 */
139void trace_ust_destroy_session(struct ltt_ust_session *session);
140void trace_ust_destroy_metadata(struct ltt_ust_metadata *metadata);
141void trace_ust_destroy_channel(struct ltt_ust_channel *channel);
142void trace_ust_destroy_event(struct ltt_ust_event *event);
143
74d0b642 144#else /* HAVE_LIBLTTNG_UST_CTL */
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145
146static inline
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147struct ltt_ust_event *trace_ust_find_event_by_name(struct cds_lfht *ht,
148 char *name)
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149{
150 return NULL;
151}
f6a9efaa 152
3bd1e081 153static inline
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154struct ltt_ust_channel *trace_ust_find_channel_by_name(struct cds_lfht *ht,
155 char *name)
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156{
157 return NULL;
158}
f6a9efaa 159
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160static inline
161struct ltt_ust_session *trace_ust_create_session(char *path, pid_t pid,
162 struct lttng_domain *domain)
163{
164 return NULL;
165}
166static inline
167struct ltt_ust_channel *trace_ust_create_channel(struct lttng_channel *attr,
168 char *path)
169{
170 return NULL;
171}
172static inline
173struct ltt_ust_event *trace_ust_create_event(struct lttng_event *ev)
174{
175 return NULL;
176}
177static inline
178struct ltt_ust_metadata *trace_ust_create_metadata(char *path)
179{
180 return NULL;
181}
182
183static inline
184void trace_ust_destroy_session(struct ltt_ust_session *session)
185{
186}
48842b30 187
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188static inline
189void trace_ust_destroy_metadata(struct ltt_ust_metadata *metadata)
190{
191}
48842b30 192
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193static inline
194void trace_ust_destroy_channel(struct ltt_ust_channel *channel)
195{
196}
48842b30 197
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198static inline
199void trace_ust_destroy_event(struct ltt_ust_event *event)
200{
201}
202
74d0b642 203#endif /* HAVE_LIBLTTNG_UST_CTL */
3bd1e081 204
97ee3a89 205#endif /* _LTT_TRACE_UST_H */
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