Preliminary work for full UST support
[lttng-tools.git] / ltt-sessiond / trace-ust.h
CommitLineData
97ee3a89
DG
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
2bdd86d4
MD
32/* UST Stream list */
33struct ltt_ust_stream_list {
34 unsigned int count;
35 struct cds_list_head head;
36};
37
f6a9efaa
DG
38/* Context hash table nodes */
39struct ltt_ust_context {
40 struct lttng_ust_context ctx;
41 struct cds_lfht_node node;
97ee3a89
DG
42};
43
44/* UST event */
45struct ltt_ust_event {
f6a9efaa
DG
46 struct lttng_ust_event attr;
47 struct cds_lfht *ctx;
48 struct cds_lfht_node node;
2bdd86d4
MD
49};
50
51/* UST stream */
52struct ltt_ust_stream {
48842b30
DG
53 int handle;
54 char pathname[PATH_MAX];
2bdd86d4 55 struct object_data *obj;
48842b30 56 struct cds_lfht_node node;
97ee3a89
DG
57};
58
59/* UST channel */
60struct ltt_ust_channel {
44d3bd01 61 char name[LTTNG_UST_SYM_NAME_LEN];
48842b30 62 char pathname[PATH_MAX];
f6a9efaa
DG
63 struct lttng_ust_channel attr;
64 struct cds_lfht *ctx;
65 struct cds_lfht *events;
66 struct cds_lfht_node node;
97ee3a89
DG
67};
68
69/* UST Metadata */
70struct ltt_ust_metadata {
71 int handle;
2bdd86d4 72 struct object_data *obj;
f6a9efaa 73 char pathname[PATH_MAX]; /* Trace file path name */
44d3bd01 74 struct lttng_ust_channel attr;
2bdd86d4 75 struct object_data *stream_obj;
97ee3a89
DG
76};
77
f6a9efaa
DG
78/* UST domain global (LTTNG_DOMAIN_UST) */
79struct ltt_ust_domain_global {
80 struct cds_lfht *channels;
81};
82
83/* UST domain pid (LTTNG_DOMAIN_UST_PID) */
84struct ltt_ust_domain_pid {
85 pid_t pid;
86 struct cds_lfht *channels;
87 struct cds_lfht_node node;
88};
89
90/* UST domain exec name (LTTNG_DOMAIN_UST_EXEC_NAME) */
91struct ltt_ust_domain_exec {
92 char exec_name[LTTNG_UST_SYM_NAME_LEN];
93 struct cds_lfht *channels;
94 struct cds_lfht_node node;
95};
96
97ee3a89
DG
97/* UST session */
98struct ltt_ust_session {
48842b30 99 int uid; /* Unique identifier of session */
3bd1e081 100 int consumer_fds_sent;
2bdd86d4 101 int consumer_fd;
48842b30 102 char pathname[PATH_MAX];
f6a9efaa
DG
103 struct ltt_ust_domain_global domain_global;
104 /*
48842b30
DG
105 * Those two hash tables contains data for a specific UST domain and each
106 * contains a HT of channels. See ltt_ust_domain_exec and
107 * ltt_ust_domain_pid data structures.
f6a9efaa
DG
108 */
109 struct cds_lfht *domain_pid;
110 struct cds_lfht *domain_exec;
97ee3a89
DG
111};
112
3bd1e081
MD
113#ifdef CONFIG_LTTNG_TOOLS_HAVE_UST
114
97ee3a89
DG
115/*
116 * Lookup functions. NULL is returned if not found.
117 */
f6a9efaa
DG
118struct ltt_ust_event *trace_ust_find_event_by_name(struct cds_lfht *ht,
119 char *name);
120struct ltt_ust_channel *trace_ust_find_channel_by_name(struct cds_lfht *ht,
121 char *name);
97ee3a89
DG
122
123/*
124 * Create functions malloc() the data structure.
125 */
48842b30 126struct ltt_ust_session *trace_ust_create_session(char *path, unsigned int uid,
44d3bd01
DG
127 struct lttng_domain *domain);
128struct ltt_ust_channel *trace_ust_create_channel(struct lttng_channel *attr,
129 char *path);
97ee3a89
DG
130struct ltt_ust_event *trace_ust_create_event(struct lttng_event *ev);
131struct ltt_ust_metadata *trace_ust_create_metadata(char *path);
132
133/*
134 * Destroy functions free() the data structure and remove from linked list if
135 * it's applies.
136 */
137void trace_ust_destroy_session(struct ltt_ust_session *session);
138void trace_ust_destroy_metadata(struct ltt_ust_metadata *metadata);
139void trace_ust_destroy_channel(struct ltt_ust_channel *channel);
140void trace_ust_destroy_event(struct ltt_ust_event *event);
141
3bd1e081
MD
142#else
143
144static inline
f6a9efaa
DG
145struct ltt_ust_event *trace_ust_find_event_by_name(struct cds_lfht *ht,
146 char *name)
3bd1e081
MD
147{
148 return NULL;
149}
f6a9efaa 150
3bd1e081 151static inline
f6a9efaa
DG
152struct ltt_ust_channel *trace_ust_find_channel_by_name(struct cds_lfht *ht,
153 char *name)
3bd1e081
MD
154{
155 return NULL;
156}
f6a9efaa 157
3bd1e081
MD
158static inline
159struct ltt_ust_session *trace_ust_create_session(char *path, pid_t pid,
160 struct lttng_domain *domain)
161{
162 return NULL;
163}
164static inline
165struct ltt_ust_channel *trace_ust_create_channel(struct lttng_channel *attr,
166 char *path)
167{
168 return NULL;
169}
170static inline
171struct ltt_ust_event *trace_ust_create_event(struct lttng_event *ev)
172{
173 return NULL;
174}
175static inline
176struct ltt_ust_metadata *trace_ust_create_metadata(char *path)
177{
178 return NULL;
179}
180
181static inline
182void trace_ust_destroy_session(struct ltt_ust_session *session)
183{
184}
48842b30 185
3bd1e081
MD
186static inline
187void trace_ust_destroy_metadata(struct ltt_ust_metadata *metadata)
188{
189}
48842b30 190
3bd1e081
MD
191static inline
192void trace_ust_destroy_channel(struct ltt_ust_channel *channel)
193{
194}
48842b30 195
3bd1e081
MD
196static inline
197void trace_ust_destroy_event(struct ltt_ust_event *event)
198{
199}
200
48842b30 201#endif /* CONFIG_CONFIG_LTTNG_TOOLS_HAVE_UST */
3bd1e081 202
97ee3a89 203#endif /* _LTT_TRACE_UST_H */
This page took 0.047078 seconds and 4 git commands to generate.