344ba508dc0d109608506aafc25f97f1abef927d
[lttng-tools.git] / src / common / sessiond-comm / sessiond-comm.h
1 /*
2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
3 * Julien Desfossez <julien.desfossez@polymtl.ca>
4 * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License, version 2 only,
8 * as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 */
19
20 /*
21 * This header is meant for liblttng and libust internal use ONLY. These
22 * declarations should NOT be considered stable API.
23 */
24
25 #ifndef _LTTNG_SESSIOND_COMM_H
26 #define _LTTNG_SESSIOND_COMM_H
27
28 #include <limits.h>
29 #include <lttng/lttng.h>
30 #include <lttng/snapshot-internal.h>
31 #include <lttng/save-internal.h>
32 #include <common/compat/socket.h>
33 #include <common/uri.h>
34 #include <common/defaults.h>
35 #include <common/compat/uuid.h>
36
37 #include <arpa/inet.h>
38 #include <netinet/in.h>
39 #include <sys/un.h>
40
41 #include "inet.h"
42 #include "inet6.h"
43 #include "unix.h"
44
45 /* Queue size of listen(2) */
46 #define LTTNG_SESSIOND_COMM_MAX_LISTEN 64
47
48 /* Maximum number of FDs that can be sent over a Unix socket */
49 #define LTTCOMM_MAX_SEND_FDS 4
50
51 /*
52 * Get the error code index from 0 since LTTCOMM_OK start at 1000
53 */
54 #define LTTCOMM_ERR_INDEX(code) (code - LTTCOMM_CONSUMERD_COMMAND_SOCK_READY)
55
56 enum lttcomm_sessiond_command {
57 /* Tracer command */
58 LTTNG_ADD_CONTEXT = 0,
59 LTTNG_CALIBRATE = 1,
60 LTTNG_DISABLE_CHANNEL = 2,
61 LTTNG_DISABLE_EVENT = 3,
62 LTTNG_LIST_SYSCALLS = 4,
63 LTTNG_ENABLE_CHANNEL = 5,
64 LTTNG_ENABLE_EVENT = 6,
65 /* 7 */
66 /* Session daemon command */
67 LTTNG_CREATE_SESSION = 8,
68 LTTNG_DESTROY_SESSION = 9,
69 LTTNG_LIST_CHANNELS = 10,
70 LTTNG_LIST_DOMAINS = 11,
71 LTTNG_LIST_EVENTS = 12,
72 LTTNG_LIST_SESSIONS = 13,
73 LTTNG_LIST_TRACEPOINTS = 14,
74 LTTNG_REGISTER_CONSUMER = 15,
75 LTTNG_START_TRACE = 16,
76 LTTNG_STOP_TRACE = 17,
77 LTTNG_LIST_TRACEPOINT_FIELDS = 18,
78
79 /* Consumer */
80 LTTNG_DISABLE_CONSUMER = 19,
81 LTTNG_ENABLE_CONSUMER = 20,
82 LTTNG_SET_CONSUMER_URI = 21,
83 /* 22 */
84 /* 23 */
85 LTTNG_DATA_PENDING = 24,
86 LTTNG_SNAPSHOT_ADD_OUTPUT = 25,
87 LTTNG_SNAPSHOT_DEL_OUTPUT = 26,
88 LTTNG_SNAPSHOT_LIST_OUTPUT = 27,
89 LTTNG_SNAPSHOT_RECORD = 28,
90 LTTNG_CREATE_SESSION_SNAPSHOT = 29,
91 LTTNG_CREATE_SESSION_LIVE = 30,
92 LTTNG_SAVE_SESSION = 31,
93 LTTNG_TRACK_PID = 32,
94 LTTNG_UNTRACK_PID = 33,
95 LTTNG_LIST_TRACKER_PIDS = 34,
96 LTTNG_SET_SESSION_SHM_PATH = 40,
97 LTTNG_METADATA_REGENERATE = 41,
98 };
99
100 enum lttcomm_relayd_command {
101 RELAYD_ADD_STREAM = 1,
102 RELAYD_CREATE_SESSION = 2,
103 RELAYD_START_DATA = 3,
104 RELAYD_UPDATE_SYNC_INFO = 4,
105 RELAYD_VERSION = 5,
106 RELAYD_SEND_METADATA = 6,
107 RELAYD_CLOSE_STREAM = 7,
108 RELAYD_DATA_PENDING = 8,
109 RELAYD_QUIESCENT_CONTROL = 9,
110 RELAYD_BEGIN_DATA_PENDING = 10,
111 RELAYD_END_DATA_PENDING = 11,
112 RELAYD_ADD_INDEX = 12,
113 RELAYD_SEND_INDEX = 13,
114 RELAYD_CLOSE_INDEX = 14,
115 /* Live-reading commands (2.4+). */
116 RELAYD_LIST_SESSIONS = 15,
117 /* All streams of the channel have been sent to the relayd (2.4+). */
118 RELAYD_STREAMS_SENT = 16,
119 /* Ask the relay to reset the metadata trace file (2.8+) */
120 RELAYD_RESET_METADATA = 17,
121 };
122
123 /*
124 * lttcomm error code.
125 */
126 enum lttcomm_return_code {
127 LTTCOMM_CONSUMERD_SUCCESS = 0, /* Everything went fine. */
128 LTTCOMM_CONSUMERD_COMMAND_SOCK_READY = 1, /* Command socket ready */
129 LTTCOMM_CONSUMERD_SUCCESS_RECV_FD, /* Success on receiving fds */
130 LTTCOMM_CONSUMERD_ERROR_RECV_FD, /* Error on receiving fds */
131 LTTCOMM_CONSUMERD_ERROR_RECV_CMD, /* Error on receiving command */
132 LTTCOMM_CONSUMERD_POLL_ERROR, /* Error in polling thread */
133 LTTCOMM_CONSUMERD_POLL_NVAL, /* Poll on closed fd */
134 LTTCOMM_CONSUMERD_POLL_HUP, /* All fds have hungup */
135 LTTCOMM_CONSUMERD_EXIT_SUCCESS, /* Consumerd exiting normally */
136 LTTCOMM_CONSUMERD_EXIT_FAILURE, /* Consumerd exiting on error */
137 LTTCOMM_CONSUMERD_OUTFD_ERROR, /* Error opening the tracefile */
138 LTTCOMM_CONSUMERD_SPLICE_EBADF, /* EBADF from splice(2) */
139 LTTCOMM_CONSUMERD_SPLICE_EINVAL, /* EINVAL from splice(2) */
140 LTTCOMM_CONSUMERD_SPLICE_ENOMEM, /* ENOMEM from splice(2) */
141 LTTCOMM_CONSUMERD_SPLICE_ESPIPE, /* ESPIPE from splice(2) */
142 LTTCOMM_CONSUMERD_ENOMEM, /* Consumer is out of memory */
143 LTTCOMM_CONSUMERD_ERROR_METADATA, /* Error with metadata. */
144 LTTCOMM_CONSUMERD_FATAL, /* Fatal error. */
145 LTTCOMM_CONSUMERD_RELAYD_FAIL, /* Error on remote relayd */
146 LTTCOMM_CONSUMERD_CHANNEL_FAIL, /* Channel creation failed. */
147 LTTCOMM_CONSUMERD_CHAN_NOT_FOUND, /* Channel not found. */
148
149 /* MUST be last element */
150 LTTCOMM_NR, /* Last element */
151 };
152
153 /* lttng socket protocol. */
154 enum lttcomm_sock_proto {
155 LTTCOMM_SOCK_UDP,
156 LTTCOMM_SOCK_TCP,
157 };
158
159 /*
160 * Index in the net_families array below. Please keep in sync!
161 */
162 enum lttcomm_sock_domain {
163 LTTCOMM_INET = 0,
164 LTTCOMM_INET6 = 1,
165 };
166
167 enum lttcomm_metadata_command {
168 LTTCOMM_METADATA_REQUEST = 1,
169 };
170
171 /*
172 * Commands sent from the consumerd to the sessiond to request if new metadata
173 * is available. This message is used to find the per UID _or_ per PID registry
174 * for the channel key. For per UID lookup, the triplet
175 * bits_per_long/uid/session_id is used. On lookup failure, we search for the
176 * per PID registry indexed by session id ignoring the other values.
177 */
178 struct lttcomm_metadata_request_msg {
179 uint64_t session_id; /* Tracing session id */
180 uint64_t session_id_per_pid; /* Tracing session id for per-pid */
181 uint32_t bits_per_long; /* Consumer ABI */
182 uint32_t uid;
183 uint64_t key; /* Metadata channel key. */
184 } LTTNG_PACKED;
185
186 struct lttcomm_sockaddr {
187 enum lttcomm_sock_domain type;
188 union {
189 struct sockaddr_in sin;
190 struct sockaddr_in6 sin6;
191 } addr;
192 } LTTNG_PACKED;
193
194 struct lttcomm_sock {
195 int32_t fd;
196 enum lttcomm_sock_proto proto;
197 struct lttcomm_sockaddr sockaddr;
198 const struct lttcomm_proto_ops *ops;
199 } LTTNG_PACKED;
200
201 /*
202 * Relayd sock. Adds the protocol version to use for the communications with
203 * the relayd.
204 */
205 struct lttcomm_relayd_sock {
206 struct lttcomm_sock sock;
207 uint32_t major;
208 uint32_t minor;
209 } LTTNG_PACKED;
210
211 struct lttcomm_net_family {
212 int family;
213 int (*create) (struct lttcomm_sock *sock, int type, int proto);
214 };
215
216 struct lttcomm_proto_ops {
217 int (*bind) (struct lttcomm_sock *sock);
218 int (*close) (struct lttcomm_sock *sock);
219 int (*connect) (struct lttcomm_sock *sock);
220 struct lttcomm_sock *(*accept) (struct lttcomm_sock *sock);
221 int (*listen) (struct lttcomm_sock *sock, int backlog);
222 ssize_t (*recvmsg) (struct lttcomm_sock *sock, void *buf, size_t len,
223 int flags);
224 ssize_t (*sendmsg) (struct lttcomm_sock *sock, const void *buf,
225 size_t len, int flags);
226 };
227
228 /*
229 * Data structure received from lttng client to session daemon.
230 */
231 struct lttcomm_session_msg {
232 uint32_t cmd_type; /* enum lttcomm_sessiond_command */
233 struct lttng_session session;
234 struct lttng_domain domain;
235 union {
236 /* Event data */
237 struct {
238 char channel_name[LTTNG_SYMBOL_NAME_LEN];
239 struct lttng_event event LTTNG_PACKED;
240 /* Length of following filter expression. */
241 uint32_t expression_len;
242 /* Length of following bytecode for filter. */
243 uint32_t bytecode_len;
244 /* exclusion data */
245 uint32_t exclusion_count;
246 /*
247 * After this structure, the following variable-length
248 * items are transmitted:
249 * - char exclusion_names[LTTNG_SYMBOL_NAME_LEN][exclusion_count]
250 * - unsigned char filter_expression[expression_len]
251 * - unsigned char filter_bytecode[bytecode_len]
252 */
253 } LTTNG_PACKED enable;
254 struct {
255 char channel_name[LTTNG_SYMBOL_NAME_LEN];
256 struct lttng_event event LTTNG_PACKED;
257 /* Length of following filter expression. */
258 uint32_t expression_len;
259 /* Length of following bytecode for filter. */
260 uint32_t bytecode_len;
261 /*
262 * After this structure, the following variable-length
263 * items are transmitted:
264 * - unsigned char filter_expression[expression_len]
265 * - unsigned char filter_bytecode[bytecode_len]
266 */
267 } LTTNG_PACKED disable;
268 /* Create channel */
269 struct {
270 struct lttng_channel chan LTTNG_PACKED;
271 } LTTNG_PACKED channel;
272 /* Context */
273 struct {
274 char channel_name[LTTNG_SYMBOL_NAME_LEN];
275 struct lttng_event_context ctx LTTNG_PACKED;
276 uint32_t provider_name_len;
277 uint32_t context_name_len;
278 } LTTNG_PACKED context;
279 /* Use by register_consumer */
280 struct {
281 char path[PATH_MAX];
282 } LTTNG_PACKED reg;
283 /* List */
284 struct {
285 char channel_name[LTTNG_SYMBOL_NAME_LEN];
286 } LTTNG_PACKED list;
287 struct lttng_calibrate calibrate;
288 /* Used by the set_consumer_url and used by create_session also call */
289 struct {
290 /* Number of lttng_uri following */
291 uint32_t size;
292 } LTTNG_PACKED uri;
293 struct {
294 struct lttng_snapshot_output output LTTNG_PACKED;
295 } LTTNG_PACKED snapshot_output;
296 struct {
297 uint32_t wait;
298 struct lttng_snapshot_output output LTTNG_PACKED;
299 } LTTNG_PACKED snapshot_record;
300 struct {
301 uint32_t nb_uri;
302 unsigned int timer_interval; /* usec */
303 } LTTNG_PACKED session_live;
304 struct {
305 struct lttng_save_session_attr attr; /* struct already packed */
306 } LTTNG_PACKED save_session;
307 struct {
308 char shm_path[PATH_MAX];
309 } LTTNG_PACKED set_shm_path;
310 struct {
311 uint32_t pid;
312 } LTTNG_PACKED pid_tracker;
313 } u;
314 } LTTNG_PACKED;
315
316 #define LTTNG_FILTER_MAX_LEN 65536
317
318 /*
319 * Filter bytecode data. The reloc table is located at the end of the
320 * bytecode. It is made of tuples: (uint16_t, var. len. string). It
321 * starts at reloc_table_offset.
322 */
323 #define LTTNG_FILTER_PADDING 32
324 struct lttng_filter_bytecode {
325 uint32_t len; /* len of data */
326 uint32_t reloc_table_offset;
327 uint64_t seqnum;
328 char padding[LTTNG_FILTER_PADDING];
329 char data[0];
330 } LTTNG_PACKED;
331
332 /*
333 * Event exclusion data. At the end of the structure, there will actually
334 * by zero or more names, where the actual number of names is given by
335 * the 'count' item of the structure.
336 */
337 #define LTTNG_EVENT_EXCLUSION_PADDING 32
338 struct lttng_event_exclusion {
339 uint32_t count;
340 char padding[LTTNG_EVENT_EXCLUSION_PADDING];
341 char names[0][LTTNG_SYMBOL_NAME_LEN];
342 } LTTNG_PACKED;
343
344 #define LTTNG_EVENT_EXCLUSION_NAME_AT(_exclusion, _i) \
345 (&(_exclusion)->names[_i][0])
346
347 /*
348 * Event command header.
349 */
350 struct lttcomm_event_command_header {
351 /* Number of events */
352 uint32_t nb_events;
353 } LTTNG_PACKED;
354
355 /*
356 * Event extended info header. This is the structure preceding each
357 * extended info data.
358 */
359 struct lttcomm_event_extended_header {
360 /*
361 * Size of filter string immediately following this header.
362 * This size includes the terminal null character.
363 */
364 uint32_t filter_len;
365
366 /*
367 * Number of exclusion names, immediately following the filter
368 * string. Each exclusion name has a fixed length of
369 * LTTNG_SYMBOL_NAME_LEN bytes, including the terminal null
370 * character.
371 */
372 uint32_t nb_exclusions;
373 } LTTNG_PACKED;
374
375 /*
376 * Channel extended info.
377 */
378 struct lttcomm_channel_extended {
379 uint64_t discarded_events;
380 uint64_t lost_packets;
381 } LTTNG_PACKED;
382
383 /*
384 * Data structure for the response from sessiond to the lttng client.
385 */
386 struct lttcomm_lttng_msg {
387 uint32_t cmd_type; /* enum lttcomm_sessiond_command */
388 uint32_t ret_code; /* enum lttcomm_return_code */
389 uint32_t pid; /* pid_t */
390 uint32_t cmd_header_size;
391 uint32_t data_size;
392 } LTTNG_PACKED;
393
394 struct lttcomm_lttng_output_id {
395 uint32_t id;
396 } LTTNG_PACKED;
397
398 /*
399 * lttcomm_consumer_msg is the message sent from sessiond to consumerd
400 * to either add a channel, add a stream, update a stream, or stop
401 * operation.
402 */
403 struct lttcomm_consumer_msg {
404 uint32_t cmd_type; /* enum consumerd_command */
405 union {
406 struct {
407 uint64_t channel_key;
408 uint64_t session_id;
409 char pathname[PATH_MAX];
410 uint32_t uid;
411 uint32_t gid;
412 uint64_t relayd_id;
413 /* nb_init_streams is the number of streams open initially. */
414 uint32_t nb_init_streams;
415 char name[LTTNG_SYMBOL_NAME_LEN];
416 /* Use splice or mmap to consume this fd */
417 enum lttng_event_output output;
418 int type; /* Per cpu or metadata. */
419 uint64_t tracefile_size; /* bytes */
420 uint32_t tracefile_count; /* number of tracefiles */
421 /* If the channel's streams have to be monitored or not. */
422 uint32_t monitor;
423 /* timer to check the streams usage in live mode (usec). */
424 unsigned int live_timer_interval;
425 } LTTNG_PACKED channel; /* Only used by Kernel. */
426 struct {
427 uint64_t stream_key;
428 uint64_t channel_key;
429 int32_t cpu; /* On which CPU this stream is assigned. */
430 /* Tells the consumer if the stream should be or not monitored. */
431 uint32_t no_monitor;
432 } LTTNG_PACKED stream; /* Only used by Kernel. */
433 struct {
434 uint64_t net_index;
435 enum lttng_stream_type type;
436 /* Open socket to the relayd */
437 struct lttcomm_relayd_sock sock;
438 /* Tracing session id associated to the relayd. */
439 uint64_t session_id;
440 /* Relayd session id, only used with control socket. */
441 uint64_t relayd_session_id;
442 } LTTNG_PACKED relayd_sock;
443 struct {
444 uint64_t net_seq_idx;
445 } LTTNG_PACKED destroy_relayd;
446 struct {
447 uint64_t session_id;
448 } LTTNG_PACKED data_pending;
449 struct {
450 uint64_t subbuf_size; /* bytes */
451 uint64_t num_subbuf; /* power of 2 */
452 int32_t overwrite; /* 1: overwrite, 0: discard */
453 uint32_t switch_timer_interval; /* usec */
454 uint32_t read_timer_interval; /* usec */
455 unsigned int live_timer_interval; /* usec */
456 int32_t output; /* splice, mmap */
457 int32_t type; /* metadata or per_cpu */
458 uint64_t session_id; /* Tracing session id */
459 char pathname[PATH_MAX]; /* Channel file path. */
460 char name[LTTNG_SYMBOL_NAME_LEN]; /* Channel name. */
461 uint32_t uid; /* User ID of the session */
462 uint32_t gid; /* Group ID ot the session */
463 uint64_t relayd_id; /* Relayd id if apply. */
464 uint64_t key; /* Unique channel key. */
465 unsigned char uuid[UUID_LEN]; /* uuid for ust tracer. */
466 uint32_t chan_id; /* Channel ID on the tracer side. */
467 uint64_t tracefile_size; /* bytes */
468 uint32_t tracefile_count; /* number of tracefiles */
469 uint64_t session_id_per_pid; /* Per-pid session ID. */
470 /* Tells the consumer if the stream should be or not monitored. */
471 uint32_t monitor;
472 /*
473 * For UST per UID buffers, this is the application UID of the
474 * channel. This can be different from the user UID requesting the
475 * channel creation and used for the rights on the stream file
476 * because the application can be in the tracing for instance.
477 */
478 uint32_t ust_app_uid;
479 char root_shm_path[PATH_MAX];
480 char shm_path[PATH_MAX];
481 } LTTNG_PACKED ask_channel;
482 struct {
483 uint64_t key;
484 } LTTNG_PACKED get_channel;
485 struct {
486 uint64_t key;
487 } LTTNG_PACKED destroy_channel;
488 struct {
489 uint64_t key; /* Metadata channel key. */
490 uint64_t target_offset; /* Offset in the consumer */
491 uint64_t len; /* Length of metadata to be received. */
492 uint64_t version; /* Version of the metadata. */
493 } LTTNG_PACKED push_metadata;
494 struct {
495 uint64_t key; /* Metadata channel key. */
496 } LTTNG_PACKED close_metadata;
497 struct {
498 uint64_t key; /* Metadata channel key. */
499 } LTTNG_PACKED setup_metadata;
500 struct {
501 uint64_t key; /* Channel key. */
502 } LTTNG_PACKED flush_channel;
503 struct {
504 char pathname[PATH_MAX];
505 /* Indicate if the snapshot goes on the relayd or locally. */
506 uint32_t use_relayd;
507 uint32_t metadata; /* This a metadata snapshot. */
508 uint64_t relayd_id; /* Relayd id if apply. */
509 uint64_t key;
510 uint64_t nb_packets_per_stream;
511 } LTTNG_PACKED snapshot_channel;
512 struct {
513 uint64_t channel_key;
514 uint64_t net_seq_idx;
515 } LTTNG_PACKED sent_streams;
516 struct {
517 uint64_t session_id;
518 uint64_t channel_key;
519 } LTTNG_PACKED discarded_events;
520 struct {
521 uint64_t session_id;
522 uint64_t channel_key;
523 } LTTNG_PACKED lost_packets;
524 struct {
525 uint64_t session_id;
526 } LTTNG_PACKED metadata_regenerate;
527 } u;
528 } LTTNG_PACKED;
529
530 /*
531 * Status message returned to the sessiond after a received command.
532 */
533 struct lttcomm_consumer_status_msg {
534 enum lttcomm_return_code ret_code;
535 } LTTNG_PACKED;
536
537 struct lttcomm_consumer_status_channel {
538 enum lttcomm_return_code ret_code;
539 uint64_t key;
540 unsigned int stream_count;
541 } LTTNG_PACKED;
542
543 #ifdef HAVE_LIBLTTNG_UST_CTL
544
545 #include <lttng/ust-abi.h>
546
547 /*
548 * Data structure for the commands sent from sessiond to UST.
549 */
550 struct lttcomm_ust_msg {
551 uint32_t handle;
552 uint32_t cmd;
553 union {
554 struct lttng_ust_channel channel;
555 struct lttng_ust_stream stream;
556 struct lttng_ust_event event;
557 struct lttng_ust_context context;
558 struct lttng_ust_tracer_version version;
559 } u;
560 } LTTNG_PACKED;
561
562 /*
563 * Data structure for the response from UST to the session daemon.
564 * cmd_type is sent back in the reply for validation.
565 */
566 struct lttcomm_ust_reply {
567 uint32_t handle;
568 uint32_t cmd;
569 uint32_t ret_code; /* enum lttcomm_return_code */
570 uint32_t ret_val; /* return value */
571 union {
572 struct {
573 uint64_t memory_map_size;
574 } LTTNG_PACKED channel;
575 struct {
576 uint64_t memory_map_size;
577 } LTTNG_PACKED stream;
578 struct lttng_ust_tracer_version version;
579 } u;
580 } LTTNG_PACKED;
581
582 #endif /* HAVE_LIBLTTNG_UST_CTL */
583
584 extern const char *lttcomm_get_readable_code(enum lttcomm_return_code code);
585
586 extern int lttcomm_init_inet_sockaddr(struct lttcomm_sockaddr *sockaddr,
587 const char *ip, unsigned int port);
588 extern int lttcomm_init_inet6_sockaddr(struct lttcomm_sockaddr *sockaddr,
589 const char *ip, unsigned int port);
590
591 extern struct lttcomm_sock *lttcomm_alloc_sock(enum lttcomm_sock_proto proto);
592 extern int lttcomm_create_sock(struct lttcomm_sock *sock);
593 extern struct lttcomm_sock *lttcomm_alloc_sock_from_uri(struct lttng_uri *uri);
594 extern void lttcomm_destroy_sock(struct lttcomm_sock *sock);
595 extern struct lttcomm_sock *lttcomm_alloc_copy_sock(struct lttcomm_sock *src);
596 extern void lttcomm_copy_sock(struct lttcomm_sock *dst,
597 struct lttcomm_sock *src);
598
599 /* Relayd socket object. */
600 extern struct lttcomm_relayd_sock *lttcomm_alloc_relayd_sock(
601 struct lttng_uri *uri, uint32_t major, uint32_t minor);
602
603 extern int lttcomm_setsockopt_rcv_timeout(int sock, unsigned int msec);
604 extern int lttcomm_setsockopt_snd_timeout(int sock, unsigned int msec);
605
606 extern void lttcomm_init(void);
607 /* Get network timeout, in milliseconds */
608 extern unsigned long lttcomm_get_network_timeout(void);
609
610 #endif /* _LTTNG_SESSIOND_COMM_H */
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