Librarify filter in liblttng-ctl and hide symbols
[lttng-tools.git] / include / lttng / lttng.h
CommitLineData
826d496d 1/*
b7384347
DG
2 * lttng.h
3 *
4 * Linux Trace Toolkit Control Library Header File
5 *
826d496d 6 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
fac6795d 7 *
1e46a50f 8 * This library is free software; you can redistribute it and/or modify it
d14d33bf
AM
9 * under the terms of the GNU Lesser General Public License, version 2.1 only,
10 * as published by the Free Software Foundation.
82a3637f 11 *
1e46a50f
TD
12 * This library is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
15 * for more details.
82a3637f 16 *
1e46a50f
TD
17 * You should have received a copy of the GNU Lesser General Public License
18 * along with this library; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
fac6795d
DG
20 */
21
73db5be4
DG
22#ifndef LTTNG_H
23#define LTTNG_H
fac6795d 24
57167058 25#include <limits.h>
1e307fab
DG
26#include <stdint.h>
27#include <sys/types.h>
57167058 28
03b1319d
DG
29/* Error codes that can be returned by API calls */
30#include <lttng/lttng-error.h>
31
b7384347 32/*
e6ddca71 33 * Event symbol length. Copied from LTTng kernel ABI.
1657e9bb 34 */
8d326ab9 35#define LTTNG_SYMBOL_NAME_LEN 256
f3ed775e 36
e6ddca71
DG
37/*
38 * Every lttng_event_* structure both apply to kernel event and user-space
39 * event.
e6ddca71
DG
40 */
41
7d29a247 42/*
1e46a50f 43 * Domain types: the different possible tracers.
7d29a247
DG
44 */
45enum lttng_domain_type {
0d0c377a
DG
46 LTTNG_DOMAIN_KERNEL = 1,
47 LTTNG_DOMAIN_UST = 2,
d78d6610
DG
48
49 /*
50 * For now, the domains below are not implemented. However, we keep them
51 * here in order to retain their enum values for future development. Note
52 * that it is on the roadmap to implement them.
53 *
0d0c377a
DG
54 LTTNG_DOMAIN_UST_EXEC_NAME = 3,
55 LTTNG_DOMAIN_UST_PID = 4,
56 LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN = 5,
d78d6610 57 */
7d29a247
DG
58};
59
7d29a247
DG
60/*
61 * Instrumentation type of tracing event.
62 */
f3ed775e 63enum lttng_event_type {
7a3d1328
MD
64 LTTNG_EVENT_ALL = -1,
65 LTTNG_EVENT_TRACEPOINT = 0,
66 LTTNG_EVENT_PROBE = 1,
67 LTTNG_EVENT_FUNCTION = 2,
68 LTTNG_EVENT_FUNCTION_ENTRY = 3,
69 LTTNG_EVENT_NOOP = 4,
70 LTTNG_EVENT_SYSCALL = 5,
0cda4f28
MD
71};
72
73/*
74 * Loglevel information.
75 */
76enum lttng_loglevel_type {
8005f29a
MD
77 LTTNG_EVENT_LOGLEVEL_ALL = 0,
78 LTTNG_EVENT_LOGLEVEL_RANGE = 1,
79 LTTNG_EVENT_LOGLEVEL_SINGLE = 2,
1657e9bb
DG
80};
81
46839cc2
MD
82/*
83 * Available loglevels.
84 */
85enum lttng_loglevel {
00e2e675
DG
86 LTTNG_LOGLEVEL_EMERG = 0,
87 LTTNG_LOGLEVEL_ALERT = 1,
88 LTTNG_LOGLEVEL_CRIT = 2,
89 LTTNG_LOGLEVEL_ERR = 3,
90 LTTNG_LOGLEVEL_WARNING = 4,
91 LTTNG_LOGLEVEL_NOTICE = 5,
92 LTTNG_LOGLEVEL_INFO = 6,
93 LTTNG_LOGLEVEL_DEBUG_SYSTEM = 7,
94 LTTNG_LOGLEVEL_DEBUG_PROGRAM = 8,
95 LTTNG_LOGLEVEL_DEBUG_PROCESS = 9,
96 LTTNG_LOGLEVEL_DEBUG_MODULE = 10,
97 LTTNG_LOGLEVEL_DEBUG_UNIT = 11,
98 LTTNG_LOGLEVEL_DEBUG_FUNCTION = 12,
99 LTTNG_LOGLEVEL_DEBUG_LINE = 13,
100 LTTNG_LOGLEVEL_DEBUG = 14,
46839cc2
MD
101};
102
e6ddca71
DG
103/*
104 * LTTng consumer mode
105 */
106enum lttng_event_output {
d78d6610
DG
107 LTTNG_EVENT_SPLICE = 0,
108 LTTNG_EVENT_MMAP = 1,
e6ddca71
DG
109};
110
7d29a247
DG
111/* Event context possible type */
112enum lttng_event_context_type {
d78d6610
DG
113 LTTNG_EVENT_CONTEXT_PID = 0,
114 LTTNG_EVENT_CONTEXT_PERF_COUNTER = 1,
9197c5c4 115 LTTNG_EVENT_CONTEXT_PROCNAME = 2,
d78d6610
DG
116 LTTNG_EVENT_CONTEXT_PRIO = 3,
117 LTTNG_EVENT_CONTEXT_NICE = 4,
118 LTTNG_EVENT_CONTEXT_VPID = 5,
119 LTTNG_EVENT_CONTEXT_TID = 6,
120 LTTNG_EVENT_CONTEXT_VTID = 7,
121 LTTNG_EVENT_CONTEXT_PPID = 8,
122 LTTNG_EVENT_CONTEXT_VPPID = 9,
9197c5c4 123 LTTNG_EVENT_CONTEXT_PTHREAD_ID = 10,
54773d68 124 LTTNG_EVENT_CONTEXT_HOSTNAME = 11,
d65106b1
DG
125};
126
d0254c7c 127enum lttng_calibrate_type {
d78d6610 128 LTTNG_CALIBRATE_FUNCTION = 0,
d0254c7c
MD
129};
130
44a5e5eb
DG
131/* Health component for the health check function. */
132enum lttng_health_component {
133 LTTNG_HEALTH_CMD,
139ac872 134 LTTNG_HEALTH_APP_MANAGE,
44a5e5eb
DG
135 LTTNG_HEALTH_APP_REG,
136 LTTNG_HEALTH_KERNEL,
137 LTTNG_HEALTH_CONSUMER,
138 LTTNG_HEALTH_ALL,
139};
140
ece640c8
RB
141/*
142 * The structures should be initialized to zero before use.
143 */
8d326ab9
DG
144#define LTTNG_DOMAIN_PADDING1 16
145#define LTTNG_DOMAIN_PADDING2 LTTNG_SYMBOL_NAME_LEN + 32
9f19cc17
DG
146struct lttng_domain {
147 enum lttng_domain_type type;
8d326ab9
DG
148 char padding[LTTNG_DOMAIN_PADDING1];
149
9f19cc17
DG
150 union {
151 pid_t pid;
152 char exec_name[NAME_MAX];
8d326ab9 153 char padding[LTTNG_DOMAIN_PADDING2];
9f19cc17
DG
154 } attr;
155};
156
ece640c8
RB
157/*
158 * Perf counter attributes
159 *
160 * The structures should be initialized to zero before use.
161 */
8d326ab9 162#define LTTNG_PERF_EVENT_PADDING1 16
7d29a247 163struct lttng_event_perf_counter_ctx {
d65106b1
DG
164 uint32_t type;
165 uint64_t config;
166 char name[LTTNG_SYMBOL_NAME_LEN];
8d326ab9
DG
167
168 char padding[LTTNG_PERF_EVENT_PADDING1];
d65106b1
DG
169};
170
ece640c8
RB
171/*
172 * Event/channel context
173 *
174 * The structures should be initialized to zero before use.
175 */
8d326ab9
DG
176#define LTTNG_EVENT_CONTEXT_PADDING1 16
177#define LTTNG_EVENT_CONTEXT_PADDING2 LTTNG_SYMBOL_NAME_LEN + 32
7d29a247
DG
178struct lttng_event_context {
179 enum lttng_event_context_type ctx;
8d326ab9
DG
180 char padding[LTTNG_EVENT_CONTEXT_PADDING1];
181
d65106b1 182 union {
7d29a247 183 struct lttng_event_perf_counter_ctx perf_counter;
8d326ab9 184 char padding[LTTNG_EVENT_CONTEXT_PADDING2];
d65106b1
DG
185 } u;
186};
187
b7384347 188/*
7d29a247
DG
189 * Event probe.
190 *
191 * Either addr is used or symbol_name and offset.
ece640c8
RB
192 *
193 * The structures should be initialized to zero before use.
57167058 194 */
8d326ab9 195#define LTTNG_EVENT_PROBE_PADDING1 16
7d29a247 196struct lttng_event_probe_attr {
f3ed775e
DG
197 uint64_t addr;
198
199 uint64_t offset;
200 char symbol_name[LTTNG_SYMBOL_NAME_LEN];
8d326ab9
DG
201
202 char padding[LTTNG_EVENT_PROBE_PADDING1];
57167058
DG
203};
204
b7384347 205/*
f3ed775e 206 * Function tracer
ece640c8
RB
207 *
208 * The structures should be initialized to zero before use.
f3ed775e 209 */
8d326ab9 210#define LTTNG_EVENT_FUNCTION_PADDING1 16
f3ed775e
DG
211struct lttng_event_function_attr {
212 char symbol_name[LTTNG_SYMBOL_NAME_LEN];
8d326ab9
DG
213
214 char padding[LTTNG_EVENT_FUNCTION_PADDING1];
f3ed775e
DG
215};
216
217/*
218 * Generic lttng event
ece640c8
RB
219 *
220 * The structures should be initialized to zero before use.
f3ed775e 221 */
fceb65df 222#define LTTNG_EVENT_PADDING1 15
8d326ab9 223#define LTTNG_EVENT_PADDING2 LTTNG_SYMBOL_NAME_LEN + 32
f3ed775e 224struct lttng_event {
0cda4f28 225 enum lttng_event_type type;
f3ed775e 226 char name[LTTNG_SYMBOL_NAME_LEN];
0cda4f28
MD
227
228 enum lttng_loglevel_type loglevel_type;
8005f29a 229 int loglevel;
0cda4f28 230
35dc4d62 231 int32_t enabled; /* Does not apply: -1 */
b551a063 232 pid_t pid;
fceb65df 233 unsigned char filter; /* filter enabled ? */
8d326ab9
DG
234
235 char padding[LTTNG_EVENT_PADDING1];
236
f3ed775e
DG
237 /* Per event type configuration */
238 union {
7d29a247 239 struct lttng_event_probe_attr probe;
f3ed775e 240 struct lttng_event_function_attr ftrace;
8d326ab9
DG
241
242 char padding[LTTNG_EVENT_PADDING2];
f3ed775e
DG
243 } attr;
244};
245
f37d259d
MD
246enum lttng_event_field_type {
247 LTTNG_EVENT_FIELD_OTHER = 0,
248 LTTNG_EVENT_FIELD_INTEGER = 1,
249 LTTNG_EVENT_FIELD_ENUM = 2,
250 LTTNG_EVENT_FIELD_FLOAT = 3,
251 LTTNG_EVENT_FIELD_STRING = 4,
252};
253
254#define LTTNG_EVENT_FIELD_PADDING LTTNG_SYMBOL_NAME_LEN + 32
255struct lttng_event_field {
256 char field_name[LTTNG_SYMBOL_NAME_LEN];
257 enum lttng_event_field_type type;
258 char padding[LTTNG_EVENT_FIELD_PADDING];
259 struct lttng_event event;
260};
261
e6ddca71
DG
262/*
263 * Tracer channel attributes. For both kernel and user-space.
ece640c8
RB
264 *
265 * The structures should be initialized to zero before use.
e6ddca71 266 */
8d326ab9 267#define LTTNG_CHANNEL_ATTR_PADDING1 LTTNG_SYMBOL_NAME_LEN + 32
f3ed775e 268struct lttng_channel_attr {
8ce37aa5
DG
269 int overwrite; /* 1: overwrite, 0: discard */
270 uint64_t subbuf_size; /* bytes */
271 uint64_t num_subbuf; /* power of 2 */
272 unsigned int switch_timer_interval; /* usec */
273 unsigned int read_timer_interval; /* usec */
f05b5f07 274 enum lttng_event_output output; /* splice, mmap */
8d326ab9
DG
275
276 char padding[LTTNG_CHANNEL_ATTR_PADDING1];
f3ed775e
DG
277};
278
279/*
e6ddca71 280 * Channel information structure. For both kernel and user-space.
ece640c8
RB
281 *
282 * The structures should be initialized to zero before use.
1657e9bb 283 */
8d326ab9 284#define LTTNG_CHANNEL_PADDING1 16
e6ddca71 285struct lttng_channel {
045e5491 286 char name[LTTNG_SYMBOL_NAME_LEN];
9f19cc17 287 uint32_t enabled;
e6ddca71 288 struct lttng_channel_attr attr;
8d326ab9
DG
289
290 char padding[LTTNG_CHANNEL_PADDING1];
f3ed775e
DG
291};
292
8d326ab9 293#define LTTNG_CALIBRATE_PADDING1 16
d0254c7c
MD
294struct lttng_calibrate {
295 enum lttng_calibrate_type type;
8d326ab9
DG
296
297 char padding[LTTNG_CALIBRATE_PADDING1];
d0254c7c
MD
298};
299
e6ddca71
DG
300/*
301 * Basic session information.
302 *
303 * This is an 'output data' meaning that it only comes *from* the session
304 * daemon *to* the lttng client. It's basically a 'human' representation of
305 * tracing entities (here a session).
ece640c8
RB
306 *
307 * The structures should be initialized to zero before use.
e6ddca71 308 */
8d326ab9 309#define LTTNG_SESSION_PADDING1 16
e6ddca71 310struct lttng_session {
f3ed775e 311 char name[NAME_MAX];
e6ddca71
DG
312 /* The path where traces are written */
313 char path[PATH_MAX];
464dd62d 314 uint32_t enabled; /* enabled/started: 1, disabled/stopped: 0 */
8d326ab9
DG
315
316 char padding[LTTNG_SESSION_PADDING1];
1657e9bb
DG
317};
318
cd80958d
DG
319/*
320 * Handle used as a context for commands.
ece640c8
RB
321 *
322 * The structures should be initialized to zero before use.
cd80958d 323 */
8d326ab9 324#define LTTNG_HANDLE_PADDING1 16
cd80958d
DG
325struct lttng_handle {
326 char session_name[NAME_MAX];
327 struct lttng_domain domain;
8d326ab9
DG
328
329 char padding[LTTNG_HANDLE_PADDING1];
cd80958d
DG
330};
331
7d29a247
DG
332/*
333 * Public LTTng control API
334 *
1e46a50f 335 * For functions having an lttng domain type as parameter, if a bad value is
7d29a247
DG
336 * given, NO default is applied and an error is returned.
337 *
338 * On success, all functions of the API return 0 or the size of the allocated
1e46a50f 339 * array (in bytes).
7d29a247
DG
340 *
341 * On error, a negative value is returned being a specific lttng-tools error
9a745bc7 342 * code which can be humanly interpreted with lttng_strerror(err).
1e46a50f
TD
343 *
344 * Exceptions to this are noted below.
7d29a247
DG
345 */
346
b7384347 347/*
1e46a50f 348 * Create a handle used as a context for every request made to the library.
cd80958d
DG
349 *
350 * This handle contains the session name and lttng domain on which the command
1e46a50f
TD
351 * will be executed.
352 * The returned pointer will be NULL in case of malloc() error.
cd80958d
DG
353 */
354extern struct lttng_handle *lttng_create_handle(const char *session_name,
355 struct lttng_domain *domain);
356
357/*
1e46a50f
TD
358 * Destroy a handle. This will simply free(3) the data pointer returned by
359 * lttng_create_handle(), rendering it unusable.
b7384347 360 */
cd80958d 361extern void lttng_destroy_handle(struct lttng_handle *handle);
7d29a247
DG
362
363/*
a4b92340
DG
364 * Create a tracing session using a name and an optional URL.
365 *
366 * If _url_ is NULL, no consumer is created for the session.
00e2e675 367 */
a4b92340 368extern int lttng_create_session(const char *name, const char *url);
00e2e675 369
7d29a247 370/*
1e46a50f 371 * Destroy a tracing session.
7d29a247 372 *
1e46a50f
TD
373 * The session will not be usable anymore, tracing will be stopped for all
374 * registered traces, and the tracing buffers will be flushed.
7d29a247 375 */
843f5df9 376extern int lttng_destroy_session(const char *name);
f3ed775e 377
e6ddca71 378/*
1e46a50f 379 * List all the tracing sessions.
7d29a247 380 *
1e46a50f
TD
381 * Return the size (number of entries) of the "lttng_session" array. Caller
382 * must free(3).
e6ddca71 383 */
ca95a216 384extern int lttng_list_sessions(struct lttng_session **sessions);
f3ed775e 385
9f19cc17 386/*
1e46a50f 387 * List the registered domain(s) of a session.
9f19cc17 388 *
1e46a50f
TD
389 * Return the size (number of entries) of the "lttng_domain" array. Caller
390 * must free(3).
9f19cc17 391 */
330be774 392extern int lttng_list_domains(const char *session_name,
9f19cc17
DG
393 struct lttng_domain **domains);
394
395/*
1e46a50f 396 * List the channel(s) of a session.
9f19cc17 397 *
1e46a50f
TD
398 * Return the size (number of entries) of the "lttng_channel" array. Caller
399 * must free(3).
9f19cc17 400 */
cd80958d
DG
401extern int lttng_list_channels(struct lttng_handle *handle,
402 struct lttng_channel **channels);
9f19cc17
DG
403
404/*
1e46a50f 405 * List the event(s) of a session channel.
9f19cc17 406 *
1e46a50f
TD
407 * Return the size (number of entries) of the "lttng_event" array.
408 * Caller must free(3).
9f19cc17 409 */
cd80958d
DG
410extern int lttng_list_events(struct lttng_handle *handle,
411 const char *channel_name, struct lttng_event **events);
9f19cc17
DG
412
413/*
1e46a50f 414 * List the available tracepoints of a specific lttng domain.
9f19cc17 415 *
1e46a50f
TD
416 * Return the size (number of entries) of the "lttng_event" array.
417 * Caller must free(3).
9f19cc17 418 */
cd80958d 419extern int lttng_list_tracepoints(struct lttng_handle *handle,
2a71efd5 420 struct lttng_event **events);
9f19cc17 421
f37d259d
MD
422/*
423 * List the available tracepoints fields of a specific lttng domain.
424 *
425 * Return the size (number of entries) of the "lttng_event_field" array.
426 * Caller must free(3).
427 */
428extern int lttng_list_tracepoint_fields(struct lttng_handle *handle,
429 struct lttng_event_field **fields);
430
7d29a247
DG
431/*
432 * Check if a session daemon is alive.
1e46a50f
TD
433 *
434 * Return 1 if alive or 0 if not. On error returns a negative value.
7d29a247 435 */
947308c4 436extern int lttng_session_daemon_alive(void);
f3ed775e 437
7d29a247 438/*
1e46a50f
TD
439 * Set the tracing group for the *current* flow of execution.
440 *
441 * On success, returns 0, on error, returns -1 (null name) or -ENOMEM.
7d29a247 442 */
b7384347 443extern int lttng_set_tracing_group(const char *name);
f3ed775e 444
7d29a247 445/*
1e46a50f 446 * Return a human-readable error message for an lttng-tools error code.
7d29a247
DG
447 *
448 * Parameter MUST be a negative value or else you'll get a generic message.
449 */
9a745bc7 450extern const char *lttng_strerror(int code);
b7384347 451
d9800920 452/*
1e46a50f
TD
453 * This call registers an "outside consumer" for a session and an lttng domain.
454 * No consumer will be spawned and all fds/commands will go through the socket
455 * path given (socket_path).
d9800920 456 *
3bd1e081 457 * NOTE: At the moment, if you use the liblttng-kconsumer, you can only use the
d9800920
DG
458 * command socket. The error socket is not supported yet for roaming consumers.
459 */
460extern int lttng_register_consumer(struct lttng_handle *handle,
461 const char *socket_path);
462
7d29a247 463/*
1e46a50f 464 * Start tracing for *all* registered traces (kernel and user-space).
7d29a247 465 */
6a4f824d 466extern int lttng_start_tracing(const char *session_name);
f3ed775e 467
7d29a247 468/*
1e46a50f 469 * Stop tracing for *all* registered traces (kernel and user-space).
7d29a247 470 */
6a4f824d 471extern int lttng_stop_tracing(const char *session_name);
f3ed775e 472
b7384347 473/*
1e46a50f 474 * Add context to event(s) for a specific channel (or for all).
7d29a247 475 *
1e46a50f 476 * If event_name is NULL, the context is applied to all events of the channel.
7d29a247 477 * If channel_name is NULL, a lookup of the event's channel is done.
1e46a50f 478 * If both are NULL, the context is applied to all events of all channels.
b7384347 479 */
cd80958d 480extern int lttng_add_context(struct lttng_handle *handle,
38057ed1
DG
481 struct lttng_event_context *ctx, const char *event_name,
482 const char *channel_name);
f3ed775e 483
7d29a247 484/*
c8f61fc6 485 * Create or enable an event (or events) for a channel.
7d29a247
DG
486 *
487 * If the event you are trying to enable does not exist, it will be created,
488 * else it is enabled.
1e46a50f 489 * If event_name is NULL, all events are enabled.
7d29a247
DG
490 * If channel_name is NULL, the default channel is used (channel0).
491 */
cd80958d
DG
492extern int lttng_enable_event(struct lttng_handle *handle,
493 struct lttng_event *ev, const char *channel_name);
f3ed775e 494
53a80697
MD
495/*
496 * Apply a filter expression to an event.
497 *
498 * If event_name is NULL, the filter is applied to all events of the channel.
499 * If channel_name is NULL, a lookup of the event's channel is done.
500 * If both are NULL, the filter is applied to all events of all channels.
501 */
502extern int lttng_set_event_filter(struct lttng_handle *handle,
503 const char *event_name,
504 const char *channel_name,
505 const char *filter_expression);
7d29a247 506/*
c8f61fc6 507 * Create or enable a channel.
1e46a50f 508 * The channel name cannot be NULL.
7d29a247 509 */
cd80958d 510extern int lttng_enable_channel(struct lttng_handle *handle,
38057ed1 511 struct lttng_channel *chan);
f3ed775e 512
7d29a247 513/*
c8f61fc6 514 * Disable event(s) of a channel and domain.
7d29a247 515 *
1e46a50f 516 * If event_name is NULL, all events are disabled.
7d29a247
DG
517 * If channel_name is NULL, the default channel is used (channel0).
518 */
cd80958d
DG
519extern int lttng_disable_event(struct lttng_handle *handle,
520 const char *name, const char *channel_name);
fac6795d 521
1df4dedd 522/*
c8f61fc6 523 * Disable channel.
7d29a247 524 *
1e46a50f 525 * The channel name cannot be NULL.
1df4dedd 526 */
cd80958d 527extern int lttng_disable_channel(struct lttng_handle *handle,
38057ed1 528 const char *name);
1df4dedd 529
d0254c7c
MD
530/*
531 * Calibrate LTTng overhead.
532 */
cd80958d 533extern int lttng_calibrate(struct lttng_handle *handle,
d0254c7c
MD
534 struct lttng_calibrate *calibrate);
535
5edd7e09
DG
536/*
537 * Set the default channel attributes for a specific domain and an allocated
538 * lttng_channel_attr pointer.
1e46a50f
TD
539 *
540 * If either or both of the arguments are NULL, nothing happens.
5edd7e09
DG
541 */
542extern void lttng_channel_set_default_attr(struct lttng_domain *domain,
543 struct lttng_channel_attr *attr);
544
00e2e675 545/*
a4b92340
DG
546 * Set URL for a consumer for a session and domain.
547 *
548 * Both data and control URL must be defined. If both URLs are the same, only
549 * the control URL is used even for network streaming.
00e2e675 550 *
a4b92340
DG
551 * Default port are 5342 and 5343 respectively for control and data which uses
552 * the TCP protocol.
00e2e675 553 */
a4b92340
DG
554extern int lttng_set_consumer_url(struct lttng_handle *handle,
555 const char *control_url, const char *data_url);
00e2e675
DG
556
557/*
558 * Enable the consumer for a session and domain.
559 */
560extern int lttng_enable_consumer(struct lttng_handle *handle);
561
562/*
563 * Disable consumer for a session and domain.
564 */
565extern int lttng_disable_consumer(struct lttng_handle *handle);
566
44a5e5eb
DG
567/*
568 * Check session daemon health for a specific component.
569 *
570 * Return 0 if health is OK or 1 if BAD. A returned value of -1 indicate that
571 * the control library was not able to connect to the session daemon health
572 * socket.
573 *
574 * Any other positive value is an lttcomm error which can be translate with
575 * lttng_strerror().
576 */
577extern int lttng_health_check(enum lttng_health_component c);
578
73db5be4 579#endif /* LTTNG_H */
This page took 0.091609 seconds and 4 git commands to generate.