Implement UST stop command
[lttng-tools.git] / lttng-sessiond / ust-app.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
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6 * as published by the Free Software Foundation; only version 2
7 * of the License.
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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
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19#ifndef _LTT_UST_APP_H
20#define _LTT_UST_APP_H
91d76f53 21
099e26bd 22#include <stdint.h>
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23#include <urcu/list.h>
24
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25#include "trace-ust.h"
26
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27#define UST_APP_EVENT_LIST_SIZE 32
28
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29extern int ust_consumer_fd;
30
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31/*
32 * Application registration data structure.
33 */
34struct ust_register_msg {
35 uint32_t major;
36 uint32_t minor;
37 pid_t pid;
38 pid_t ppid;
39 uid_t uid;
40 gid_t gid;
41 char name[16];
42};
43
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44/*
45 * Global applications HT used by the session daemon.
46 */
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47struct cds_lfht *ust_app_ht;
48
49struct cds_lfht *ust_app_sock_key_map;
50
51struct ust_app_key {
52 pid_t pid;
53 int sock;
54 struct cds_lfht_node node;
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55};
56
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57struct ust_app_event {
58 int enabled;
59 int handle;
13161846 60 struct lttng_ust_object_data *obj;
284d8f55 61 struct lttng_ust_event attr;
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62 char name[LTTNG_UST_SYM_NAME_LEN];
63 struct cds_lfht *ctx;
64 struct cds_lfht_node node;
65};
66
67struct ust_app_channel {
68 int enabled;
69 int handle;
70 char name[LTTNG_UST_SYM_NAME_LEN];
71 struct lttng_ust_channel attr;
13161846 72 struct lttng_ust_object_data *obj;
5af2f756 73 struct ltt_ust_stream_list streams;
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74 struct cds_lfht *ctx;
75 struct cds_lfht *events;
76 struct cds_lfht_node node;
77};
78
79struct ust_app_session {
80 int enabled;
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81 /* started: has the session been in started state at any time ? */
82 int started; /* allows detection of start vs restart. */
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83 int handle; /* Used has unique identifier */
84 unsigned int uid;
85 struct ltt_ust_metadata *metadata;
13161846 86 struct lttng_ust_object_data *obj;
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87 struct cds_lfht *channels; /* Registered channels */
88 struct cds_lfht_node node;
477d7741 89 char path[PATH_MAX];
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90};
91
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92/*
93 * Registered traceable applications. Libust registers to the session daemon
050349bb 94 * and a linked list is kept of all running traceable app.
91d76f53 95 */
56fff090 96struct ust_app {
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97 pid_t ppid;
98 uid_t uid; /* User ID that owns the apps */
99 gid_t gid; /* Group ID that owns the apps */
100 uint32_t v_major; /* Verion major number */
101 uint32_t v_minor; /* Verion minor number */
102 char name[17]; /* Process name (short) */
48842b30 103 struct cds_lfht *sessions;
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104 struct cds_lfht_node node;
105 struct ust_app_key key;
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106};
107
74d0b642 108#ifdef HAVE_LIBLTTNG_UST_CTL
3bd1e081 109
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110int ust_app_register(struct ust_register_msg *msg, int sock);
111void ust_app_unregister(int sock);
5b4a0ec0 112int ust_app_create_channel_all(struct ltt_ust_session *usess,
48842b30 113 struct ltt_ust_channel *uchan);
5b4a0ec0 114int ust_app_create_event_all(struct ltt_ust_session *usess,
48842b30 115 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
f6a9efaa 116unsigned long ust_app_list_count(void);
421cb601 117int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app);
8be98f9a 118int ust_app_stop_trace(struct ltt_ust_session *usess, struct ust_app *app);
421cb601 119int ust_app_start_trace_all(struct ltt_ust_session *usess);
8be98f9a 120int ust_app_stop_trace_all(struct ltt_ust_session *usess);
b551a063 121int ust_app_list_events(struct lttng_event **events);
487cf67c 122void ust_app_global_update(struct ltt_ust_session *usess, int sock);
91d76f53 123
56fff090 124void ust_app_clean_list(void);
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125void ust_app_ht_alloc(void);
126struct cds_lfht *ust_app_get_ht(void);
127struct ust_app *ust_app_find_by_pid(pid_t pid);
44d3bd01 128
74d0b642 129#else /* HAVE_LIBLTTNG_UST_CTL */
3bd1e081 130
d974f197 131static inline
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132int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app)
133{
134 return 0;
135}
136static inline
137int ust_app_start_trace_all(struct ltt_ust_session *usess)
d974f197 138{
5cf5d0e7 139 return 0;
d974f197 140}
3bd1e081 141static inline
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142int ust_app_list_events(struct lttng_event **events)
143{
144 return 0;
145}
146static inline
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147int ust_app_register(struct ust_register_msg *msg, int sock)
148{
149 return -ENOSYS;
150}
151static inline
152void ust_app_unregister(int sock)
153{
154}
155static inline
156unsigned int ust_app_list_count(void)
157{
158 return 0;
159}
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160static inline
161void ust_app_lock_list(void)
162{
163}
164static inline
165void ust_app_unlock_list(void)
166{
167}
168static inline
169void ust_app_clean_list(void)
170{
171}
172static inline
173struct ust_app_list *ust_app_get_list(void)
174{
175 return NULL;
176}
177static inline
178struct ust_app *ust_app_get_by_pid(pid_t pid)
179{
180 return NULL;
181}
48842b30 182static inline
421cb601 183int ust_app_add_channel_all(struct ltt_ust_session *usess,
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184 struct ltt_ust_channel *uchan)
185{
186 return 0;
187}
d974f197 188static inline
421cb601 189int ust_app_add_event_all(struct ltt_ust_session *usess,
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190 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
191{
5cf5d0e7 192 return 0;
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193}
194static inline
195struct cds_lfht *ust_app_get_ht(void)
196{
197 return NULL;
198}
199static inline
200void ust_app_ht_alloc(void)
201{
202}
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203static inline
204void ust_app_global_update(struct ltt_ust_session *usess, int sock)
205{
206}
48842b30 207
74d0b642 208#endif /* HAVE_LIBLTTNG_UST_CTL */
3bd1e081 209
f6a9efaa 210#endif /* _LTT_UST_APP_H */
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