b8278bbe0a2abb542d6945b3e0eee70631458e46
[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 <lttng/channel-internal.h>
33 #include <lttng/trigger/trigger-internal.h>
34 #include <lttng/rotate-internal.h>
35 #include <common/compat/socket.h>
36 #include <common/uri.h>
37 #include <common/defaults.h>
38 #include <common/compat/uuid.h>
39
40 #include <arpa/inet.h>
41 #include <netinet/in.h>
42 #include <sys/un.h>
43
44 #include "inet.h"
45 #include "inet6.h"
46 #include <common/unix.h>
47
48 /* Queue size of listen(2) */
49 #define LTTNG_SESSIOND_COMM_MAX_LISTEN 64
50
51 /* Maximum number of FDs that can be sent over a Unix socket */
52 #define LTTCOMM_MAX_SEND_FDS 4
53
54 /*
55 * Get the error code index from 0 since LTTCOMM_OK start at 1000
56 */
57 #define LTTCOMM_ERR_INDEX(code) (code - LTTCOMM_CONSUMERD_COMMAND_SOCK_READY)
58
59 enum lttcomm_sessiond_command {
60 /* Tracer command */
61 LTTNG_ADD_CONTEXT = 0,
62 /* LTTNG_CALIBRATE used to be here */
63 LTTNG_DISABLE_CHANNEL = 2,
64 LTTNG_DISABLE_EVENT = 3,
65 LTTNG_LIST_SYSCALLS = 4,
66 LTTNG_ENABLE_CHANNEL = 5,
67 LTTNG_ENABLE_EVENT = 6,
68 /* 7 */
69 /* Session daemon command */
70 LTTNG_CREATE_SESSION = 8,
71 LTTNG_DESTROY_SESSION = 9,
72 LTTNG_LIST_CHANNELS = 10,
73 LTTNG_LIST_DOMAINS = 11,
74 LTTNG_LIST_EVENTS = 12,
75 LTTNG_LIST_SESSIONS = 13,
76 LTTNG_LIST_TRACEPOINTS = 14,
77 LTTNG_REGISTER_CONSUMER = 15,
78 LTTNG_START_TRACE = 16,
79 LTTNG_STOP_TRACE = 17,
80 LTTNG_LIST_TRACEPOINT_FIELDS = 18,
81
82 /* Consumer */
83 LTTNG_DISABLE_CONSUMER = 19,
84 LTTNG_ENABLE_CONSUMER = 20,
85 LTTNG_SET_CONSUMER_URI = 21,
86 /* 22 */
87 /* 23 */
88 LTTNG_DATA_PENDING = 24,
89 LTTNG_SNAPSHOT_ADD_OUTPUT = 25,
90 LTTNG_SNAPSHOT_DEL_OUTPUT = 26,
91 LTTNG_SNAPSHOT_LIST_OUTPUT = 27,
92 LTTNG_SNAPSHOT_RECORD = 28,
93 LTTNG_CREATE_SESSION_SNAPSHOT = 29,
94 LTTNG_CREATE_SESSION_LIVE = 30,
95 LTTNG_SAVE_SESSION = 31,
96 LTTNG_TRACK_PID = 32,
97 LTTNG_UNTRACK_PID = 33,
98 LTTNG_LIST_TRACKER_PIDS = 34,
99 LTTNG_SET_SESSION_SHM_PATH = 40,
100 LTTNG_REGENERATE_METADATA = 41,
101 LTTNG_REGENERATE_STATEDUMP = 42,
102 LTTNG_REGISTER_TRIGGER = 43,
103 LTTNG_UNREGISTER_TRIGGER = 44,
104 LTTNG_ROTATE_SESSION = 45,
105 LTTNG_ROTATION_GET_INFO = 46,
106 LTTNG_ROTATION_SET_SCHEDULE = 47,
107 LTTNG_SESSION_GET_CURRENT_OUTPUT = 48,
108 LTTNG_ROTATION_SCHEDULE_GET_TIMER_PERIOD = 49,
109 LTTNG_ROTATION_SCHEDULE_GET_SIZE = 50,
110 };
111
112 enum lttcomm_relayd_command {
113 RELAYD_ADD_STREAM = 1,
114 RELAYD_CREATE_SESSION = 2,
115 RELAYD_START_DATA = 3,
116 RELAYD_UPDATE_SYNC_INFO = 4,
117 RELAYD_VERSION = 5,
118 RELAYD_SEND_METADATA = 6,
119 RELAYD_CLOSE_STREAM = 7,
120 RELAYD_DATA_PENDING = 8,
121 RELAYD_QUIESCENT_CONTROL = 9,
122 RELAYD_BEGIN_DATA_PENDING = 10,
123 RELAYD_END_DATA_PENDING = 11,
124 RELAYD_ADD_INDEX = 12,
125 RELAYD_SEND_INDEX = 13,
126 RELAYD_CLOSE_INDEX = 14,
127 /* Live-reading commands (2.4+). */
128 RELAYD_LIST_SESSIONS = 15,
129 /* All streams of the channel have been sent to the relayd (2.4+). */
130 RELAYD_STREAMS_SENT = 16,
131 /* Ask the relay to reset the metadata trace file (2.8+) */
132 RELAYD_RESET_METADATA = 17,
133 /* Ask the relay to rotate a stream file (2.11+) */
134 RELAYD_ROTATE_STREAM = 18,
135 /* Rename a chunk after the rotation is completed (2.11+) */
136 RELAYD_ROTATE_RENAME = 19,
137 /* Check if a chunk has data pending (2.11+) */
138 RELAYD_ROTATE_PENDING = 20,
139 /* Create a folder on the relayd FS (2.11+) */
140 RELAYD_MKDIR = 21,
141 };
142
143 /*
144 * lttcomm error code.
145 */
146 enum lttcomm_return_code {
147 LTTCOMM_CONSUMERD_SUCCESS = 0, /* Everything went fine. */
148 LTTCOMM_CONSUMERD_COMMAND_SOCK_READY = 1, /* Command socket ready */
149 LTTCOMM_CONSUMERD_SUCCESS_RECV_FD, /* Success on receiving fds */
150 LTTCOMM_CONSUMERD_ERROR_RECV_FD, /* Error on receiving fds */
151 LTTCOMM_CONSUMERD_ERROR_RECV_CMD, /* Error on receiving command */
152 LTTCOMM_CONSUMERD_POLL_ERROR, /* Error in polling thread */
153 LTTCOMM_CONSUMERD_POLL_NVAL, /* Poll on closed fd */
154 LTTCOMM_CONSUMERD_POLL_HUP, /* All fds have hungup */
155 LTTCOMM_CONSUMERD_EXIT_SUCCESS, /* Consumerd exiting normally */
156 LTTCOMM_CONSUMERD_EXIT_FAILURE, /* Consumerd exiting on error */
157 LTTCOMM_CONSUMERD_OUTFD_ERROR, /* Error opening the tracefile */
158 LTTCOMM_CONSUMERD_SPLICE_EBADF, /* EBADF from splice(2) */
159 LTTCOMM_CONSUMERD_SPLICE_EINVAL, /* EINVAL from splice(2) */
160 LTTCOMM_CONSUMERD_SPLICE_ENOMEM, /* ENOMEM from splice(2) */
161 LTTCOMM_CONSUMERD_SPLICE_ESPIPE, /* ESPIPE from splice(2) */
162 LTTCOMM_CONSUMERD_ENOMEM, /* Consumer is out of memory */
163 LTTCOMM_CONSUMERD_ERROR_METADATA, /* Error with metadata. */
164 LTTCOMM_CONSUMERD_FATAL, /* Fatal error. */
165 LTTCOMM_CONSUMERD_RELAYD_FAIL, /* Error on remote relayd */
166 LTTCOMM_CONSUMERD_CHANNEL_FAIL, /* Channel creation failed. */
167 LTTCOMM_CONSUMERD_CHAN_NOT_FOUND, /* Channel not found. */
168 LTTCOMM_CONSUMERD_ALREADY_SET, /* Resource already set. */
169
170 /* MUST be last element */
171 LTTCOMM_NR, /* Last element */
172 };
173
174 /* lttng socket protocol. */
175 enum lttcomm_sock_proto {
176 LTTCOMM_SOCK_UDP,
177 LTTCOMM_SOCK_TCP,
178 };
179
180 /*
181 * Index in the net_families array below. Please keep in sync!
182 */
183 enum lttcomm_sock_domain {
184 LTTCOMM_INET = 0,
185 LTTCOMM_INET6 = 1,
186 };
187
188 enum lttcomm_metadata_command {
189 LTTCOMM_METADATA_REQUEST = 1,
190 };
191
192 /*
193 * Commands sent from the consumerd to the sessiond to request if new metadata
194 * is available. This message is used to find the per UID _or_ per PID registry
195 * for the channel key. For per UID lookup, the triplet
196 * bits_per_long/uid/session_id is used. On lookup failure, we search for the
197 * per PID registry indexed by session id ignoring the other values.
198 */
199 struct lttcomm_metadata_request_msg {
200 uint64_t session_id; /* Tracing session id */
201 uint64_t session_id_per_pid; /* Tracing session id for per-pid */
202 uint32_t bits_per_long; /* Consumer ABI */
203 uint32_t uid;
204 uint64_t key; /* Metadata channel key. */
205 } LTTNG_PACKED;
206
207 struct lttcomm_sockaddr {
208 enum lttcomm_sock_domain type;
209 union {
210 struct sockaddr_in sin;
211 struct sockaddr_in6 sin6;
212 } addr;
213 } LTTNG_PACKED;
214
215 struct lttcomm_sock {
216 int32_t fd;
217 enum lttcomm_sock_proto proto;
218 struct lttcomm_sockaddr sockaddr;
219 const struct lttcomm_proto_ops *ops;
220 } LTTNG_PACKED;
221
222 /*
223 * Relayd sock. Adds the protocol version to use for the communications with
224 * the relayd.
225 */
226 struct lttcomm_relayd_sock {
227 struct lttcomm_sock sock;
228 uint32_t major;
229 uint32_t minor;
230 } LTTNG_PACKED;
231
232 struct lttcomm_net_family {
233 int family;
234 int (*create) (struct lttcomm_sock *sock, int type, int proto);
235 };
236
237 struct lttcomm_proto_ops {
238 int (*bind) (struct lttcomm_sock *sock);
239 int (*close) (struct lttcomm_sock *sock);
240 int (*connect) (struct lttcomm_sock *sock);
241 struct lttcomm_sock *(*accept) (struct lttcomm_sock *sock);
242 int (*listen) (struct lttcomm_sock *sock, int backlog);
243 ssize_t (*recvmsg) (struct lttcomm_sock *sock, void *buf, size_t len,
244 int flags);
245 ssize_t (*sendmsg) (struct lttcomm_sock *sock, const void *buf,
246 size_t len, int flags);
247 };
248
249 /*
250 * Data structure received from lttng client to session daemon.
251 */
252 struct lttcomm_session_msg {
253 uint32_t cmd_type; /* enum lttcomm_sessiond_command */
254 struct lttng_session session;
255 struct lttng_domain domain;
256 union {
257 /* Event data */
258 struct {
259 char channel_name[LTTNG_SYMBOL_NAME_LEN];
260 struct lttng_event event LTTNG_PACKED;
261 /* Length of following filter expression. */
262 uint32_t expression_len;
263 /* Length of following bytecode for filter. */
264 uint32_t bytecode_len;
265 /* exclusion data */
266 uint32_t exclusion_count;
267 /*
268 * After this structure, the following variable-length
269 * items are transmitted:
270 * - char exclusion_names[LTTNG_SYMBOL_NAME_LEN][exclusion_count]
271 * - unsigned char filter_expression[expression_len]
272 * - unsigned char filter_bytecode[bytecode_len]
273 */
274 } LTTNG_PACKED enable;
275 struct {
276 char channel_name[LTTNG_SYMBOL_NAME_LEN];
277 struct lttng_event event LTTNG_PACKED;
278 /* Length of following filter expression. */
279 uint32_t expression_len;
280 /* Length of following bytecode for filter. */
281 uint32_t bytecode_len;
282 /*
283 * After this structure, the following variable-length
284 * items are transmitted:
285 * - unsigned char filter_expression[expression_len]
286 * - unsigned char filter_bytecode[bytecode_len]
287 */
288 } LTTNG_PACKED disable;
289 /* Create channel */
290 struct {
291 struct lttng_channel chan LTTNG_PACKED;
292 /* struct lttng_channel_extended is already packed. */
293 struct lttng_channel_extended extended;
294 } LTTNG_PACKED channel;
295 /* Context */
296 struct {
297 char channel_name[LTTNG_SYMBOL_NAME_LEN];
298 struct lttng_event_context ctx LTTNG_PACKED;
299 uint32_t provider_name_len;
300 uint32_t context_name_len;
301 } LTTNG_PACKED context;
302 /* Use by register_consumer */
303 struct {
304 char path[PATH_MAX];
305 } LTTNG_PACKED reg;
306 /* List */
307 struct {
308 char channel_name[LTTNG_SYMBOL_NAME_LEN];
309 } LTTNG_PACKED list;
310 struct lttng_calibrate calibrate;
311 /* Used by the set_consumer_url and used by create_session also call */
312 struct {
313 /* Number of lttng_uri following */
314 uint32_t size;
315 } LTTNG_PACKED uri;
316 struct {
317 struct lttng_snapshot_output output LTTNG_PACKED;
318 } LTTNG_PACKED snapshot_output;
319 struct {
320 uint32_t wait;
321 struct lttng_snapshot_output output LTTNG_PACKED;
322 } LTTNG_PACKED snapshot_record;
323 struct {
324 uint32_t nb_uri;
325 unsigned int timer_interval; /* usec */
326 } LTTNG_PACKED session_live;
327 struct {
328 struct lttng_save_session_attr attr; /* struct already packed */
329 } LTTNG_PACKED save_session;
330 struct {
331 char shm_path[PATH_MAX];
332 } LTTNG_PACKED set_shm_path;
333 struct {
334 uint32_t pid;
335 } LTTNG_PACKED pid_tracker;
336 struct {
337 uint32_t length;
338 } LTTNG_PACKED trigger;
339 struct {
340 uint64_t rotation_id;
341 } LTTNG_PACKED get_rotation_info;
342 struct {
343 uint64_t timer_us;
344 uint64_t size;
345 } LTTNG_PACKED rotate_setup;
346 } u;
347 } LTTNG_PACKED;
348
349 #define LTTNG_FILTER_MAX_LEN 65536
350
351 /*
352 * Filter bytecode data. The reloc table is located at the end of the
353 * bytecode. It is made of tuples: (uint16_t, var. len. string). It
354 * starts at reloc_table_offset.
355 */
356 #define LTTNG_FILTER_PADDING 32
357 struct lttng_filter_bytecode {
358 uint32_t len; /* len of data */
359 uint32_t reloc_table_offset;
360 uint64_t seqnum;
361 char padding[LTTNG_FILTER_PADDING];
362 char data[0];
363 } LTTNG_PACKED;
364
365 /*
366 * Event exclusion data. At the end of the structure, there will actually
367 * by zero or more names, where the actual number of names is given by
368 * the 'count' item of the structure.
369 */
370 #define LTTNG_EVENT_EXCLUSION_PADDING 32
371 struct lttng_event_exclusion {
372 uint32_t count;
373 char padding[LTTNG_EVENT_EXCLUSION_PADDING];
374 char names[0][LTTNG_SYMBOL_NAME_LEN];
375 } LTTNG_PACKED;
376
377 #define LTTNG_EVENT_EXCLUSION_NAME_AT(_exclusion, _i) \
378 (&(_exclusion)->names[_i][0])
379
380 /*
381 * Event command header.
382 */
383 struct lttcomm_event_command_header {
384 /* Number of events */
385 uint32_t nb_events;
386 } LTTNG_PACKED;
387
388 /*
389 * Event extended info header. This is the structure preceding each
390 * extended info data.
391 */
392 struct lttcomm_event_extended_header {
393 /*
394 * Size of filter string immediately following this header.
395 * This size includes the terminal null character.
396 */
397 uint32_t filter_len;
398
399 /*
400 * Number of exclusion names, immediately following the filter
401 * string. Each exclusion name has a fixed length of
402 * LTTNG_SYMBOL_NAME_LEN bytes, including the terminal null
403 * character.
404 */
405 uint32_t nb_exclusions;
406 } LTTNG_PACKED;
407
408 /*
409 * Data structure for the response from sessiond to the lttng client.
410 */
411 struct lttcomm_lttng_msg {
412 uint32_t cmd_type; /* enum lttcomm_sessiond_command */
413 uint32_t ret_code; /* enum lttcomm_return_code */
414 uint32_t pid; /* pid_t */
415 uint32_t cmd_header_size;
416 uint32_t data_size;
417 } LTTNG_PACKED;
418
419 struct lttcomm_lttng_output_id {
420 uint32_t id;
421 } LTTNG_PACKED;
422
423 /*
424 * lttcomm_consumer_msg is the message sent from sessiond to consumerd
425 * to either add a channel, add a stream, update a stream, or stop
426 * operation.
427 */
428 struct lttcomm_consumer_msg {
429 uint32_t cmd_type; /* enum consumerd_command */
430 union {
431 struct {
432 uint64_t channel_key;
433 uint64_t session_id;
434 char pathname[PATH_MAX];
435 uint32_t uid;
436 uint32_t gid;
437 uint64_t relayd_id;
438 /* nb_init_streams is the number of streams open initially. */
439 uint32_t nb_init_streams;
440 char name[LTTNG_SYMBOL_NAME_LEN];
441 /* Use splice or mmap to consume this fd */
442 enum lttng_event_output output;
443 int type; /* Per cpu or metadata. */
444 uint64_t tracefile_size; /* bytes */
445 uint32_t tracefile_count; /* number of tracefiles */
446 /* If the channel's streams have to be monitored or not. */
447 uint32_t monitor;
448 /* timer to check the streams usage in live mode (usec). */
449 unsigned int live_timer_interval;
450 /* timer to sample a channel's positions (usec). */
451 unsigned int monitor_timer_interval;
452 } LTTNG_PACKED channel; /* Only used by Kernel. */
453 struct {
454 uint64_t stream_key;
455 uint64_t channel_key;
456 int32_t cpu; /* On which CPU this stream is assigned. */
457 /* Tells the consumer if the stream should be or not monitored. */
458 uint32_t no_monitor;
459 } LTTNG_PACKED stream; /* Only used by Kernel. */
460 struct {
461 uint64_t net_index;
462 enum lttng_stream_type type;
463 /* Open socket to the relayd */
464 struct lttcomm_relayd_sock sock;
465 /* Tracing session id associated to the relayd. */
466 uint64_t session_id;
467 /* Relayd session id, only used with control socket. */
468 uint64_t relayd_session_id;
469 } LTTNG_PACKED relayd_sock;
470 struct {
471 uint64_t net_seq_idx;
472 } LTTNG_PACKED destroy_relayd;
473 struct {
474 uint64_t session_id;
475 } LTTNG_PACKED data_pending;
476 struct {
477 uint64_t subbuf_size; /* bytes */
478 uint64_t num_subbuf; /* power of 2 */
479 int32_t overwrite; /* 1: overwrite, 0: discard */
480 uint32_t switch_timer_interval; /* usec */
481 uint32_t read_timer_interval; /* usec */
482 unsigned int live_timer_interval; /* usec */
483 uint32_t monitor_timer_interval; /* usec */
484 int32_t output; /* splice, mmap */
485 int32_t type; /* metadata or per_cpu */
486 uint64_t session_id; /* Tracing session id */
487 char pathname[PATH_MAX]; /* Channel file path. */
488 char name[LTTNG_SYMBOL_NAME_LEN]; /* Channel name. */
489 uint32_t uid; /* User ID of the session */
490 uint32_t gid; /* Group ID ot the session */
491 uint64_t relayd_id; /* Relayd id if apply. */
492 uint64_t key; /* Unique channel key. */
493 unsigned char uuid[UUID_LEN]; /* uuid for ust tracer. */
494 uint32_t chan_id; /* Channel ID on the tracer side. */
495 uint64_t tracefile_size; /* bytes */
496 uint32_t tracefile_count; /* number of tracefiles */
497 uint64_t session_id_per_pid; /* Per-pid session ID. */
498 /* Tells the consumer if the stream should be or not monitored. */
499 uint32_t monitor;
500 /*
501 * For UST per UID buffers, this is the application UID of the
502 * channel. This can be different from the user UID requesting the
503 * channel creation and used for the rights on the stream file
504 * because the application can be in the tracing for instance.
505 */
506 uint32_t ust_app_uid;
507 int64_t blocking_timeout;
508 char root_shm_path[PATH_MAX];
509 char shm_path[PATH_MAX];
510 } LTTNG_PACKED ask_channel;
511 struct {
512 uint64_t key;
513 } LTTNG_PACKED get_channel;
514 struct {
515 uint64_t key;
516 } LTTNG_PACKED destroy_channel;
517 struct {
518 uint64_t key; /* Metadata channel key. */
519 uint64_t target_offset; /* Offset in the consumer */
520 uint64_t len; /* Length of metadata to be received. */
521 uint64_t version; /* Version of the metadata. */
522 } LTTNG_PACKED push_metadata;
523 struct {
524 uint64_t key; /* Metadata channel key. */
525 } LTTNG_PACKED close_metadata;
526 struct {
527 uint64_t key; /* Metadata channel key. */
528 } LTTNG_PACKED setup_metadata;
529 struct {
530 uint64_t key; /* Channel key. */
531 } LTTNG_PACKED flush_channel;
532 struct {
533 uint64_t key; /* Channel key. */
534 } LTTNG_PACKED clear_quiescent_channel;
535 struct {
536 char pathname[PATH_MAX];
537 /* Indicate if the snapshot goes on the relayd or locally. */
538 uint32_t use_relayd;
539 uint32_t metadata; /* This a metadata snapshot. */
540 uint64_t relayd_id; /* Relayd id if apply. */
541 uint64_t key;
542 uint64_t nb_packets_per_stream;
543 } LTTNG_PACKED snapshot_channel;
544 struct {
545 uint64_t channel_key;
546 uint64_t net_seq_idx;
547 } LTTNG_PACKED sent_streams;
548 struct {
549 uint64_t session_id;
550 uint64_t channel_key;
551 } LTTNG_PACKED discarded_events;
552 struct {
553 uint64_t session_id;
554 uint64_t channel_key;
555 } LTTNG_PACKED lost_packets;
556 struct {
557 uint64_t session_id;
558 } LTTNG_PACKED regenerate_metadata;
559 struct {
560 char pathname[PATH_MAX];
561 uint32_t metadata; /* This is a metadata channel. */
562 uint64_t relayd_id; /* Relayd id if apply. */
563 uint64_t key;
564 uint64_t new_chunk_id;
565 } LTTNG_PACKED rotate_channel;
566 struct {
567 char old_path[LTTNG_PATH_MAX];
568 char new_path[LTTNG_PATH_MAX];
569 uint64_t relayd_id; /* Relayd id if apply. */
570 uint64_t session_id;
571 uint32_t uid;
572 uint32_t gid;
573 } LTTNG_PACKED rotate_rename;
574 struct {
575 uint64_t relayd_id;
576 uint64_t session_id;
577 uint64_t chunk_id;
578 } LTTNG_PACKED rotate_pending_relay;
579 struct {
580 char path[LTTNG_PATH_MAX];
581 uint64_t relayd_id; /* Relayd id if apply. */
582 uint64_t session_id;
583 uint32_t uid;
584 uint32_t gid;
585 } LTTNG_PACKED mkdir;
586 } u;
587 } LTTNG_PACKED;
588
589 /*
590 * Channel monitoring message returned to the session daemon on every
591 * monitor timer expiration.
592 */
593 struct lttcomm_consumer_channel_monitor_msg {
594 /* Key of the sampled channel. */
595 uint64_t key;
596 /*
597 * Lowest and highest usage (bytes) at the moment the sample was taken.
598 */
599 uint64_t lowest, highest;
600 /*
601 * Sum of all the consumed positions for a channel.
602 */
603 uint64_t total_consumed;
604 } LTTNG_PACKED;
605
606 /*
607 * Status message returned to the sessiond after a received command.
608 */
609 struct lttcomm_consumer_status_msg {
610 enum lttcomm_return_code ret_code;
611 } LTTNG_PACKED;
612
613 struct lttcomm_consumer_status_channel {
614 enum lttcomm_return_code ret_code;
615 uint64_t key;
616 unsigned int stream_count;
617 } LTTNG_PACKED;
618
619 #ifdef HAVE_LIBLTTNG_UST_CTL
620
621 #include <lttng/ust-abi.h>
622
623 /*
624 * Data structure for the commands sent from sessiond to UST.
625 */
626 struct lttcomm_ust_msg {
627 uint32_t handle;
628 uint32_t cmd;
629 union {
630 struct lttng_ust_channel channel;
631 struct lttng_ust_stream stream;
632 struct lttng_ust_event event;
633 struct lttng_ust_context context;
634 struct lttng_ust_tracer_version version;
635 } u;
636 } LTTNG_PACKED;
637
638 /*
639 * Data structure for the response from UST to the session daemon.
640 * cmd_type is sent back in the reply for validation.
641 */
642 struct lttcomm_ust_reply {
643 uint32_t handle;
644 uint32_t cmd;
645 uint32_t ret_code; /* enum lttcomm_return_code */
646 uint32_t ret_val; /* return value */
647 union {
648 struct {
649 uint64_t memory_map_size;
650 } LTTNG_PACKED channel;
651 struct {
652 uint64_t memory_map_size;
653 } LTTNG_PACKED stream;
654 struct lttng_ust_tracer_version version;
655 } u;
656 } LTTNG_PACKED;
657
658 #endif /* HAVE_LIBLTTNG_UST_CTL */
659
660 extern const char *lttcomm_get_readable_code(enum lttcomm_return_code code);
661
662 extern int lttcomm_init_inet_sockaddr(struct lttcomm_sockaddr *sockaddr,
663 const char *ip, unsigned int port);
664 extern int lttcomm_init_inet6_sockaddr(struct lttcomm_sockaddr *sockaddr,
665 const char *ip, unsigned int port);
666
667 extern struct lttcomm_sock *lttcomm_alloc_sock(enum lttcomm_sock_proto proto);
668 extern int lttcomm_create_sock(struct lttcomm_sock *sock);
669 extern struct lttcomm_sock *lttcomm_alloc_sock_from_uri(struct lttng_uri *uri);
670 extern void lttcomm_destroy_sock(struct lttcomm_sock *sock);
671 extern struct lttcomm_sock *lttcomm_alloc_copy_sock(struct lttcomm_sock *src);
672 extern void lttcomm_copy_sock(struct lttcomm_sock *dst,
673 struct lttcomm_sock *src);
674
675 /* Relayd socket object. */
676 extern struct lttcomm_relayd_sock *lttcomm_alloc_relayd_sock(
677 struct lttng_uri *uri, uint32_t major, uint32_t minor);
678
679 extern int lttcomm_setsockopt_rcv_timeout(int sock, unsigned int msec);
680 extern int lttcomm_setsockopt_snd_timeout(int sock, unsigned int msec);
681
682 extern void lttcomm_init(void);
683 /* Get network timeout, in milliseconds */
684 extern unsigned long lttcomm_get_network_timeout(void);
685
686 #endif /* _LTTNG_SESSIOND_COMM_H */
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