Add missing function references with no UST support
[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;
48842b30 103 char pathname[PATH_MAX];
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104 struct ltt_ust_domain_global domain_global;
105 /*
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106 * Those two hash tables contains data for a specific UST domain and each
107 * contains a HT of channels. See ltt_ust_domain_exec and
108 * ltt_ust_domain_pid data structures.
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109 */
110 struct cds_lfht *domain_pid;
111 struct cds_lfht *domain_exec;
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112};
113
74d0b642 114#ifdef HAVE_LIBLTTNG_UST_CTL
3bd1e081 115
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116/*
117 * Lookup functions. NULL is returned if not found.
118 */
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119struct ltt_ust_event *trace_ust_find_event_by_name(struct cds_lfht *ht,
120 char *name);
121struct ltt_ust_channel *trace_ust_find_channel_by_name(struct cds_lfht *ht,
122 char *name);
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123
124/*
125 * Create functions malloc() the data structure.
126 */
48842b30 127struct ltt_ust_session *trace_ust_create_session(char *path, unsigned int uid,
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128 struct lttng_domain *domain);
129struct ltt_ust_channel *trace_ust_create_channel(struct lttng_channel *attr,
130 char *path);
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131struct ltt_ust_event *trace_ust_create_event(struct lttng_event *ev);
132struct ltt_ust_metadata *trace_ust_create_metadata(char *path);
133
134/*
135 * Destroy functions free() the data structure and remove from linked list if
136 * it's applies.
137 */
138void trace_ust_destroy_session(struct ltt_ust_session *session);
139void trace_ust_destroy_metadata(struct ltt_ust_metadata *metadata);
140void trace_ust_destroy_channel(struct ltt_ust_channel *channel);
141void trace_ust_destroy_event(struct ltt_ust_event *event);
142
74d0b642 143#else /* HAVE_LIBLTTNG_UST_CTL */
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144
145static inline
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146struct ltt_ust_event *trace_ust_find_event_by_name(struct cds_lfht *ht,
147 char *name)
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148{
149 return NULL;
150}
f6a9efaa 151
3bd1e081 152static inline
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153struct ltt_ust_channel *trace_ust_find_channel_by_name(struct cds_lfht *ht,
154 char *name)
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155{
156 return NULL;
157}
f6a9efaa 158
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159static inline
160struct ltt_ust_session *trace_ust_create_session(char *path, pid_t pid,
161 struct lttng_domain *domain)
162{
163 return NULL;
164}
165static inline
166struct ltt_ust_channel *trace_ust_create_channel(struct lttng_channel *attr,
167 char *path)
168{
169 return NULL;
170}
171static inline
172struct ltt_ust_event *trace_ust_create_event(struct lttng_event *ev)
173{
174 return NULL;
175}
176static inline
177struct ltt_ust_metadata *trace_ust_create_metadata(char *path)
178{
179 return NULL;
180}
181
182static inline
183void trace_ust_destroy_session(struct ltt_ust_session *session)
184{
185}
48842b30 186
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187static inline
188void trace_ust_destroy_metadata(struct ltt_ust_metadata *metadata)
189{
190}
48842b30 191
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192static inline
193void trace_ust_destroy_channel(struct ltt_ust_channel *channel)
194{
195}
48842b30 196
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197static inline
198void trace_ust_destroy_event(struct ltt_ust_event *event)
199{
200}
201
74d0b642 202#endif /* HAVE_LIBLTTNG_UST_CTL */
3bd1e081 203
97ee3a89 204#endif /* _LTT_TRACE_UST_H */
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