Fix: missing include can cause structures to not be packed
[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 #include <common/macros.h>
40
41 #include <arpa/inet.h>
42 #include <netinet/in.h>
43 #include <sys/un.h>
44
45 #include "inet.h"
46 #include "inet6.h"
47 #include <common/unix.h>
48
49 /* Queue size of listen(2) */
50 #define LTTNG_SESSIOND_COMM_MAX_LISTEN 64
51
52 /* Maximum number of FDs that can be sent over a Unix socket */
53 #define LTTCOMM_MAX_SEND_FDS 4
54
55 /*
56 * Get the error code index from 0 since LTTCOMM_OK start at 1000
57 */
58 #define LTTCOMM_ERR_INDEX(code) (code - LTTCOMM_CONSUMERD_COMMAND_SOCK_READY)
59
60 enum lttcomm_sessiond_command {
61 /* Tracer command */
62 LTTNG_ADD_CONTEXT = 0,
63 /* LTTNG_CALIBRATE used to be here */
64 LTTNG_DISABLE_CHANNEL = 2,
65 LTTNG_DISABLE_EVENT = 3,
66 LTTNG_LIST_SYSCALLS = 4,
67 LTTNG_ENABLE_CHANNEL = 5,
68 LTTNG_ENABLE_EVENT = 6,
69 /* 7 */
70 /* Session daemon command */
71 LTTNG_CREATE_SESSION = 8,
72 LTTNG_DESTROY_SESSION = 9,
73 LTTNG_LIST_CHANNELS = 10,
74 LTTNG_LIST_DOMAINS = 11,
75 LTTNG_LIST_EVENTS = 12,
76 LTTNG_LIST_SESSIONS = 13,
77 LTTNG_LIST_TRACEPOINTS = 14,
78 LTTNG_REGISTER_CONSUMER = 15,
79 LTTNG_START_TRACE = 16,
80 LTTNG_STOP_TRACE = 17,
81 LTTNG_LIST_TRACEPOINT_FIELDS = 18,
82
83 /* Consumer */
84 LTTNG_DISABLE_CONSUMER = 19,
85 LTTNG_ENABLE_CONSUMER = 20,
86 LTTNG_SET_CONSUMER_URI = 21,
87 /* 22 */
88 /* 23 */
89 LTTNG_DATA_PENDING = 24,
90 LTTNG_SNAPSHOT_ADD_OUTPUT = 25,
91 LTTNG_SNAPSHOT_DEL_OUTPUT = 26,
92 LTTNG_SNAPSHOT_LIST_OUTPUT = 27,
93 LTTNG_SNAPSHOT_RECORD = 28,
94 LTTNG_CREATE_SESSION_SNAPSHOT = 29,
95 LTTNG_CREATE_SESSION_LIVE = 30,
96 LTTNG_SAVE_SESSION = 31,
97 LTTNG_TRACK_PID = 32,
98 LTTNG_UNTRACK_PID = 33,
99 LTTNG_LIST_TRACKER_PIDS = 34,
100 LTTNG_SET_SESSION_SHM_PATH = 40,
101 LTTNG_REGENERATE_METADATA = 41,
102 LTTNG_REGENERATE_STATEDUMP = 42,
103 LTTNG_REGISTER_TRIGGER = 43,
104 LTTNG_UNREGISTER_TRIGGER = 44,
105 LTTNG_ROTATE_SESSION = 45,
106 LTTNG_ROTATION_GET_INFO = 46,
107 LTTNG_ROTATION_SET_SCHEDULE = 47,
108 LTTNG_SESSION_LIST_ROTATION_SCHEDULES = 48,
109 };
110
111 enum lttcomm_relayd_command {
112 RELAYD_ADD_STREAM = 1,
113 RELAYD_CREATE_SESSION = 2,
114 RELAYD_START_DATA = 3,
115 RELAYD_UPDATE_SYNC_INFO = 4,
116 RELAYD_VERSION = 5,
117 RELAYD_SEND_METADATA = 6,
118 RELAYD_CLOSE_STREAM = 7,
119 RELAYD_DATA_PENDING = 8,
120 RELAYD_QUIESCENT_CONTROL = 9,
121 RELAYD_BEGIN_DATA_PENDING = 10,
122 RELAYD_END_DATA_PENDING = 11,
123 RELAYD_ADD_INDEX = 12,
124 RELAYD_SEND_INDEX = 13,
125 RELAYD_CLOSE_INDEX = 14,
126 /* Live-reading commands (2.4+). */
127 RELAYD_LIST_SESSIONS = 15,
128 /* All streams of the channel have been sent to the relayd (2.4+). */
129 RELAYD_STREAMS_SENT = 16,
130 /* Ask the relay to reset the metadata trace file (2.8+) */
131 RELAYD_RESET_METADATA = 17,
132 /* Ask the relay to rotate a stream file (2.11+) */
133 RELAYD_ROTATE_STREAM = 18,
134 /* Rename a chunk after the rotation is completed (2.11+) */
135 RELAYD_ROTATE_RENAME = 19,
136 /* Check if a chunk has data pending (2.11+) */
137 RELAYD_ROTATE_PENDING = 20,
138 /* Create a folder on the relayd FS (2.11+) */
139 RELAYD_MKDIR = 21,
140 };
141
142 /*
143 * lttcomm error code.
144 */
145 enum lttcomm_return_code {
146 LTTCOMM_CONSUMERD_SUCCESS = 0, /* Everything went fine. */
147 LTTCOMM_CONSUMERD_COMMAND_SOCK_READY = 1, /* Command socket ready */
148 LTTCOMM_CONSUMERD_SUCCESS_RECV_FD, /* Success on receiving fds */
149 LTTCOMM_CONSUMERD_ERROR_RECV_FD, /* Error on receiving fds */
150 LTTCOMM_CONSUMERD_ERROR_RECV_CMD, /* Error on receiving command */
151 LTTCOMM_CONSUMERD_POLL_ERROR, /* Error in polling thread */
152 LTTCOMM_CONSUMERD_POLL_NVAL, /* Poll on closed fd */
153 LTTCOMM_CONSUMERD_POLL_HUP, /* All fds have hungup */
154 LTTCOMM_CONSUMERD_EXIT_SUCCESS, /* Consumerd exiting normally */
155 LTTCOMM_CONSUMERD_EXIT_FAILURE, /* Consumerd exiting on error */
156 LTTCOMM_CONSUMERD_OUTFD_ERROR, /* Error opening the tracefile */
157 LTTCOMM_CONSUMERD_SPLICE_EBADF, /* EBADF from splice(2) */
158 LTTCOMM_CONSUMERD_SPLICE_EINVAL, /* EINVAL from splice(2) */
159 LTTCOMM_CONSUMERD_SPLICE_ENOMEM, /* ENOMEM from splice(2) */
160 LTTCOMM_CONSUMERD_SPLICE_ESPIPE, /* ESPIPE from splice(2) */
161 LTTCOMM_CONSUMERD_ENOMEM, /* Consumer is out of memory */
162 LTTCOMM_CONSUMERD_ERROR_METADATA, /* Error with metadata. */
163 LTTCOMM_CONSUMERD_FATAL, /* Fatal error. */
164 LTTCOMM_CONSUMERD_RELAYD_FAIL, /* Error on remote relayd */
165 LTTCOMM_CONSUMERD_CHANNEL_FAIL, /* Channel creation failed. */
166 LTTCOMM_CONSUMERD_CHAN_NOT_FOUND, /* Channel not found. */
167 LTTCOMM_CONSUMERD_ALREADY_SET, /* Resource already set. */
168 LTTCOMM_CONSUMERD_ROTATION_FAIL, /* Rotation has failed. */
169 LTTCOMM_CONSUMERD_ROTATE_RENAME_FAILED, /* Rotation rename has failed. */
170 LTTCOMM_CONSUMERD_ROTATION_PENDING_LOCAL_FAILED, /* Rotation pending relay failed. */
171 LTTCOMM_CONSUMERD_ROTATION_PENDING_RELAY_FAILED, /* Rotation pending relay failed. */
172 LTTCOMM_CONSUMERD_MKDIR_FAILED, /* mkdir has failed. */
173 LTTCOMM_CONSUMERD_SNAPSHOT_FAILED, /* snapshot has failed. */
174
175 /* MUST be last element */
176 LTTCOMM_NR, /* Last element */
177 };
178
179 /* lttng socket protocol. */
180 enum lttcomm_sock_proto {
181 LTTCOMM_SOCK_UDP,
182 LTTCOMM_SOCK_TCP,
183 };
184
185 /*
186 * Index in the net_families array below. Please keep in sync!
187 */
188 enum lttcomm_sock_domain {
189 LTTCOMM_INET = 0,
190 LTTCOMM_INET6 = 1,
191 };
192
193 enum lttcomm_metadata_command {
194 LTTCOMM_METADATA_REQUEST = 1,
195 };
196
197 /*
198 * Commands sent from the consumerd to the sessiond to request if new metadata
199 * is available. This message is used to find the per UID _or_ per PID registry
200 * for the channel key. For per UID lookup, the triplet
201 * bits_per_long/uid/session_id is used. On lookup failure, we search for the
202 * per PID registry indexed by session id ignoring the other values.
203 */
204 struct lttcomm_metadata_request_msg {
205 uint64_t session_id; /* Tracing session id */
206 uint64_t session_id_per_pid; /* Tracing session id for per-pid */
207 uint32_t bits_per_long; /* Consumer ABI */
208 uint32_t uid;
209 uint64_t key; /* Metadata channel key. */
210 } LTTNG_PACKED;
211
212 struct lttcomm_sockaddr {
213 enum lttcomm_sock_domain type;
214 union {
215 struct sockaddr_in sin;
216 struct sockaddr_in6 sin6;
217 } addr;
218 } LTTNG_PACKED;
219
220 struct lttcomm_sock {
221 int32_t fd;
222 enum lttcomm_sock_proto proto;
223 struct lttcomm_sockaddr sockaddr;
224 const struct lttcomm_proto_ops *ops;
225 } LTTNG_PACKED;
226
227 /*
228 * Relayd sock. Adds the protocol version to use for the communications with
229 * the relayd.
230 */
231 struct lttcomm_relayd_sock {
232 struct lttcomm_sock sock;
233 uint32_t major;
234 uint32_t minor;
235 } LTTNG_PACKED;
236
237 struct lttcomm_net_family {
238 int family;
239 int (*create) (struct lttcomm_sock *sock, int type, int proto);
240 };
241
242 struct lttcomm_proto_ops {
243 int (*bind) (struct lttcomm_sock *sock);
244 int (*close) (struct lttcomm_sock *sock);
245 int (*connect) (struct lttcomm_sock *sock);
246 struct lttcomm_sock *(*accept) (struct lttcomm_sock *sock);
247 int (*listen) (struct lttcomm_sock *sock, int backlog);
248 ssize_t (*recvmsg) (struct lttcomm_sock *sock, void *buf, size_t len,
249 int flags);
250 ssize_t (*sendmsg) (struct lttcomm_sock *sock, const void *buf,
251 size_t len, int flags);
252 };
253
254 /*
255 * Data structure received from lttng client to session daemon.
256 */
257 struct lttcomm_session_msg {
258 uint32_t cmd_type; /* enum lttcomm_sessiond_command */
259 struct lttng_session session;
260 struct lttng_domain domain;
261 union {
262 /* Event data */
263 struct {
264 char channel_name[LTTNG_SYMBOL_NAME_LEN];
265 struct lttng_event event LTTNG_PACKED;
266 /* Length of following filter expression. */
267 uint32_t expression_len;
268 /* Length of following bytecode for filter. */
269 uint32_t bytecode_len;
270 /* Exclusion count (fixed-size strings). */
271 uint32_t exclusion_count;
272 /* Userspace probe location size. */
273 uint32_t userspace_probe_location_len;
274 /*
275 * After this structure, the following variable-length
276 * items are transmitted:
277 * - char exclusion_names[LTTNG_SYMBOL_NAME_LEN][exclusion_count]
278 * - char filter_expression[expression_len]
279 * - unsigned char filter_bytecode[bytecode_len]
280 */
281 } LTTNG_PACKED enable;
282 struct {
283 char channel_name[LTTNG_SYMBOL_NAME_LEN];
284 struct lttng_event event LTTNG_PACKED;
285 /* Length of following filter expression. */
286 uint32_t expression_len;
287 /* Length of following bytecode for filter. */
288 uint32_t bytecode_len;
289 /*
290 * After this structure, the following variable-length
291 * items are transmitted:
292 * - unsigned char filter_expression[expression_len]
293 * - unsigned char filter_bytecode[bytecode_len]
294 */
295 } LTTNG_PACKED disable;
296 /* Create channel */
297 struct {
298 struct lttng_channel chan LTTNG_PACKED;
299 /* struct lttng_channel_extended is already packed. */
300 struct lttng_channel_extended extended;
301 } LTTNG_PACKED channel;
302 /* Context */
303 struct {
304 char channel_name[LTTNG_SYMBOL_NAME_LEN];
305 struct lttng_event_context ctx LTTNG_PACKED;
306 uint32_t provider_name_len;
307 uint32_t context_name_len;
308 } LTTNG_PACKED context;
309 /* Use by register_consumer */
310 struct {
311 char path[PATH_MAX];
312 } LTTNG_PACKED reg;
313 /* List */
314 struct {
315 char channel_name[LTTNG_SYMBOL_NAME_LEN];
316 } LTTNG_PACKED list;
317 struct lttng_calibrate calibrate;
318 /* Used by the set_consumer_url and used by create_session also call */
319 struct {
320 /* Number of lttng_uri following */
321 uint32_t size;
322 } LTTNG_PACKED uri;
323 struct {
324 struct lttng_snapshot_output output LTTNG_PACKED;
325 } LTTNG_PACKED snapshot_output;
326 struct {
327 uint32_t wait;
328 struct lttng_snapshot_output output LTTNG_PACKED;
329 } LTTNG_PACKED snapshot_record;
330 struct {
331 uint32_t nb_uri;
332 unsigned int timer_interval; /* usec */
333 } LTTNG_PACKED session_live;
334 struct {
335 struct lttng_save_session_attr attr; /* struct already packed */
336 } LTTNG_PACKED save_session;
337 struct {
338 char shm_path[PATH_MAX];
339 } LTTNG_PACKED set_shm_path;
340 struct {
341 uint32_t pid;
342 } LTTNG_PACKED pid_tracker;
343 struct {
344 uint32_t length;
345 } LTTNG_PACKED trigger;
346 struct {
347 uint64_t rotation_id;
348 } LTTNG_PACKED get_rotation_info;
349 struct {
350 /* enum lttng_rotation_schedule_type */
351 uint8_t type;
352 /*
353 * If set == 1, set schedule to value, if set == 0,
354 * clear this schedule type.
355 */
356 uint8_t set;
357 uint64_t value;
358 } LTTNG_PACKED rotation_set_schedule;
359 } u;
360 } LTTNG_PACKED;
361
362 #define LTTNG_FILTER_MAX_LEN 65536
363
364 /*
365 * Filter bytecode data. The reloc table is located at the end of the
366 * bytecode. It is made of tuples: (uint16_t, var. len. string). It
367 * starts at reloc_table_offset.
368 */
369 #define LTTNG_FILTER_PADDING 32
370 struct lttng_filter_bytecode {
371 uint32_t len; /* len of data */
372 uint32_t reloc_table_offset;
373 uint64_t seqnum;
374 char padding[LTTNG_FILTER_PADDING];
375 char data[0];
376 } LTTNG_PACKED;
377
378 /*
379 * Event exclusion data. At the end of the structure, there will actually
380 * by zero or more names, where the actual number of names is given by
381 * the 'count' item of the structure.
382 */
383 #define LTTNG_EVENT_EXCLUSION_PADDING 32
384 struct lttng_event_exclusion {
385 uint32_t count;
386 char padding[LTTNG_EVENT_EXCLUSION_PADDING];
387 char names[0][LTTNG_SYMBOL_NAME_LEN];
388 } LTTNG_PACKED;
389
390 #define LTTNG_EVENT_EXCLUSION_NAME_AT(_exclusion, _i) \
391 (&(_exclusion)->names[_i][0])
392
393 /*
394 * Event command header.
395 */
396 struct lttcomm_event_command_header {
397 /* Number of events */
398 uint32_t nb_events;
399 } LTTNG_PACKED;
400
401 /*
402 * Event extended info header. This is the structure preceding each
403 * extended info data.
404 */
405 struct lttcomm_event_extended_header {
406 /*
407 * Size of filter string immediately following this header.
408 * This size includes the terminal null character.
409 */
410 uint32_t filter_len;
411
412 /*
413 * Number of exclusion names, immediately following the filter
414 * string. Each exclusion name has a fixed length of
415 * LTTNG_SYMBOL_NAME_LEN bytes, including the terminal null
416 * character.
417 */
418 uint32_t nb_exclusions;
419
420 /*
421 * Size of the event's userspace probe location (if applicable).
422 */
423 uint32_t userspace_probe_location_len;
424 } LTTNG_PACKED;
425
426 /*
427 * Data structure for the response from sessiond to the lttng client.
428 */
429 struct lttcomm_lttng_msg {
430 uint32_t cmd_type; /* enum lttcomm_sessiond_command */
431 uint32_t ret_code; /* enum lttcomm_return_code */
432 uint32_t pid; /* pid_t */
433 uint32_t cmd_header_size;
434 uint32_t data_size;
435 } LTTNG_PACKED;
436
437 struct lttcomm_lttng_output_id {
438 uint32_t id;
439 } LTTNG_PACKED;
440
441 /*
442 * lttcomm_consumer_msg is the message sent from sessiond to consumerd
443 * to either add a channel, add a stream, update a stream, or stop
444 * operation.
445 */
446 struct lttcomm_consumer_msg {
447 uint32_t cmd_type; /* enum lttng_consumer_command */
448 union {
449 struct {
450 uint64_t channel_key;
451 uint64_t session_id;
452 char pathname[PATH_MAX];
453 uint32_t uid;
454 uint32_t gid;
455 uint64_t relayd_id;
456 /* nb_init_streams is the number of streams open initially. */
457 uint32_t nb_init_streams;
458 char name[LTTNG_SYMBOL_NAME_LEN];
459 /* Use splice or mmap to consume this fd */
460 enum lttng_event_output output;
461 int type; /* Per cpu or metadata. */
462 uint64_t tracefile_size; /* bytes */
463 uint32_t tracefile_count; /* number of tracefiles */
464 /* If the channel's streams have to be monitored or not. */
465 uint32_t monitor;
466 /* timer to check the streams usage in live mode (usec). */
467 unsigned int live_timer_interval;
468 /* timer to sample a channel's positions (usec). */
469 unsigned int monitor_timer_interval;
470 } LTTNG_PACKED channel; /* Only used by Kernel. */
471 struct {
472 uint64_t stream_key;
473 uint64_t channel_key;
474 int32_t cpu; /* On which CPU this stream is assigned. */
475 /* Tells the consumer if the stream should be or not monitored. */
476 uint32_t no_monitor;
477 /*
478 * The archive id that was "current" at the time this
479 * stream was created. This is used to determine
480 * whether a rotation request was sent before or after
481 * the creation of a stream.
482 */
483 uint64_t trace_archive_id;
484 } LTTNG_PACKED stream; /* Only used by Kernel. */
485 struct {
486 uint64_t net_index;
487 enum lttng_stream_type type;
488 /* Open socket to the relayd */
489 struct lttcomm_relayd_sock sock;
490 /* Tracing session id associated to the relayd. */
491 uint64_t session_id;
492 /* Relayd session id, only used with control socket. */
493 uint64_t relayd_session_id;
494 } LTTNG_PACKED relayd_sock;
495 struct {
496 uint64_t net_seq_idx;
497 } LTTNG_PACKED destroy_relayd;
498 struct {
499 uint64_t session_id;
500 } LTTNG_PACKED data_pending;
501 struct {
502 uint64_t subbuf_size; /* bytes */
503 uint64_t num_subbuf; /* power of 2 */
504 int32_t overwrite; /* 1: overwrite, 0: discard */
505 uint32_t switch_timer_interval; /* usec */
506 uint32_t read_timer_interval; /* usec */
507 unsigned int live_timer_interval; /* usec */
508 uint32_t monitor_timer_interval; /* usec */
509 int32_t output; /* splice, mmap */
510 int32_t type; /* metadata or per_cpu */
511 uint64_t session_id; /* Tracing session id */
512 char pathname[PATH_MAX]; /* Channel file path. */
513 char name[LTTNG_SYMBOL_NAME_LEN]; /* Channel name. */
514 uint32_t uid; /* User ID of the session */
515 uint32_t gid; /* Group ID ot the session */
516 uint64_t relayd_id; /* Relayd id if apply. */
517 uint64_t key; /* Unique channel key. */
518 unsigned char uuid[UUID_LEN]; /* uuid for ust tracer. */
519 uint32_t chan_id; /* Channel ID on the tracer side. */
520 uint64_t tracefile_size; /* bytes */
521 uint32_t tracefile_count; /* number of tracefiles */
522 uint64_t session_id_per_pid; /* Per-pid session ID. */
523 /* Tells the consumer if the stream should be or not monitored. */
524 uint32_t monitor;
525 /*
526 * For UST per UID buffers, this is the application UID of the
527 * channel. This can be different from the user UID requesting the
528 * channel creation and used for the rights on the stream file
529 * because the application can be in the tracing for instance.
530 */
531 uint32_t ust_app_uid;
532 int64_t blocking_timeout;
533 /*
534 * The archive id that was "current" at the time this
535 * channel was created. This is used to determine
536 * whether a rotation request was sent before or after
537 * the creation of a channel.
538 */
539 uint64_t trace_archive_id;
540 char root_shm_path[PATH_MAX];
541 char shm_path[PATH_MAX];
542 } LTTNG_PACKED ask_channel;
543 struct {
544 uint64_t key;
545 } LTTNG_PACKED get_channel;
546 struct {
547 uint64_t key;
548 } LTTNG_PACKED destroy_channel;
549 struct {
550 uint64_t key; /* Metadata channel key. */
551 uint64_t target_offset; /* Offset in the consumer */
552 uint64_t len; /* Length of metadata to be received. */
553 uint64_t version; /* Version of the metadata. */
554 } LTTNG_PACKED push_metadata;
555 struct {
556 uint64_t key; /* Metadata channel key. */
557 } LTTNG_PACKED close_metadata;
558 struct {
559 uint64_t key; /* Metadata channel key. */
560 } LTTNG_PACKED setup_metadata;
561 struct {
562 uint64_t key; /* Channel key. */
563 } LTTNG_PACKED flush_channel;
564 struct {
565 uint64_t key; /* Channel key. */
566 } LTTNG_PACKED clear_quiescent_channel;
567 struct {
568 char pathname[PATH_MAX];
569 /* Indicate if the snapshot goes on the relayd or locally. */
570 uint32_t use_relayd;
571 uint32_t metadata; /* This a metadata snapshot. */
572 uint64_t relayd_id; /* Relayd id if apply. */
573 uint64_t key;
574 uint64_t nb_packets_per_stream;
575 /*
576 * The session's current trace archive id is propagated
577 * since a snapshot triggers the creation of an
578 * ephemeral metadata stream.
579 */
580 uint64_t trace_archive_id;
581 } LTTNG_PACKED snapshot_channel;
582 struct {
583 uint64_t channel_key;
584 uint64_t net_seq_idx;
585 } LTTNG_PACKED sent_streams;
586 struct {
587 uint64_t session_id;
588 uint64_t channel_key;
589 } LTTNG_PACKED discarded_events;
590 struct {
591 uint64_t session_id;
592 uint64_t channel_key;
593 } LTTNG_PACKED lost_packets;
594 struct {
595 uint64_t session_id;
596 } LTTNG_PACKED regenerate_metadata;
597 struct {
598 char pathname[PATH_MAX];
599 uint32_t metadata; /* This is a metadata channel. */
600 uint64_t relayd_id; /* Relayd id if apply. */
601 uint64_t key;
602 uint64_t new_chunk_id;
603 } LTTNG_PACKED rotate_channel;
604 struct {
605 char old_path[LTTNG_PATH_MAX];
606 char new_path[LTTNG_PATH_MAX];
607 uint64_t relayd_id; /* Relayd id if apply. */
608 uint64_t session_id;
609 uint32_t uid;
610 uint32_t gid;
611 } LTTNG_PACKED rotate_rename;
612 struct {
613 uint64_t session_id;
614 uint64_t chunk_id;
615 } LTTNG_PACKED check_rotation_pending_local;
616 struct {
617 uint64_t relayd_id;
618 uint64_t session_id;
619 uint64_t chunk_id;
620 } LTTNG_PACKED check_rotation_pending_relay;
621 struct {
622 char path[LTTNG_PATH_MAX];
623 uint64_t relayd_id; /* Relayd id if apply. */
624 uint64_t session_id;
625 uint32_t uid;
626 uint32_t gid;
627 } LTTNG_PACKED mkdir;
628 } u;
629 } LTTNG_PACKED;
630
631 /*
632 * Channel monitoring message returned to the session daemon on every
633 * monitor timer expiration.
634 */
635 struct lttcomm_consumer_channel_monitor_msg {
636 /* Key of the sampled channel. */
637 uint64_t key;
638 /*
639 * Lowest and highest usage (bytes) at the moment the sample was taken.
640 */
641 uint64_t lowest, highest;
642 /*
643 * Sum of all the consumed positions for a channel.
644 */
645 uint64_t total_consumed;
646 } LTTNG_PACKED;
647
648 /*
649 * Status message returned to the sessiond after a received command.
650 */
651 struct lttcomm_consumer_status_msg {
652 enum lttcomm_return_code ret_code;
653 } LTTNG_PACKED;
654
655 struct lttcomm_consumer_status_channel {
656 enum lttcomm_return_code ret_code;
657 uint64_t key;
658 unsigned int stream_count;
659 } LTTNG_PACKED;
660
661 #ifdef HAVE_LIBLTTNG_UST_CTL
662
663 #include <lttng/ust-abi.h>
664
665 /*
666 * Data structure for the commands sent from sessiond to UST.
667 */
668 struct lttcomm_ust_msg {
669 uint32_t handle;
670 uint32_t cmd;
671 union {
672 struct lttng_ust_channel channel;
673 struct lttng_ust_stream stream;
674 struct lttng_ust_event event;
675 struct lttng_ust_context context;
676 struct lttng_ust_tracer_version version;
677 } u;
678 } LTTNG_PACKED;
679
680 /*
681 * Data structure for the response from UST to the session daemon.
682 * cmd_type is sent back in the reply for validation.
683 */
684 struct lttcomm_ust_reply {
685 uint32_t handle;
686 uint32_t cmd;
687 uint32_t ret_code; /* enum lttcomm_return_code */
688 uint32_t ret_val; /* return value */
689 union {
690 struct {
691 uint64_t memory_map_size;
692 } LTTNG_PACKED channel;
693 struct {
694 uint64_t memory_map_size;
695 } LTTNG_PACKED stream;
696 struct lttng_ust_tracer_version version;
697 } u;
698 } LTTNG_PACKED;
699
700 #endif /* HAVE_LIBLTTNG_UST_CTL */
701
702 LTTNG_HIDDEN const char *lttcomm_get_readable_code(enum lttcomm_return_code code);
703
704 LTTNG_HIDDEN int lttcomm_init_inet_sockaddr(struct lttcomm_sockaddr *sockaddr,
705 const char *ip, unsigned int port);
706 LTTNG_HIDDEN int lttcomm_init_inet6_sockaddr(struct lttcomm_sockaddr *sockaddr,
707 const char *ip, unsigned int port);
708
709 LTTNG_HIDDEN struct lttcomm_sock *lttcomm_alloc_sock(enum lttcomm_sock_proto proto);
710 LTTNG_HIDDEN int lttcomm_create_sock(struct lttcomm_sock *sock);
711 LTTNG_HIDDEN struct lttcomm_sock *lttcomm_alloc_sock_from_uri(struct lttng_uri *uri);
712 LTTNG_HIDDEN void lttcomm_destroy_sock(struct lttcomm_sock *sock);
713 LTTNG_HIDDEN struct lttcomm_sock *lttcomm_alloc_copy_sock(struct lttcomm_sock *src);
714 LTTNG_HIDDEN void lttcomm_copy_sock(struct lttcomm_sock *dst,
715 struct lttcomm_sock *src);
716
717 /* Relayd socket object. */
718 LTTNG_HIDDEN struct lttcomm_relayd_sock *lttcomm_alloc_relayd_sock(
719 struct lttng_uri *uri, uint32_t major, uint32_t minor);
720
721 LTTNG_HIDDEN int lttcomm_setsockopt_rcv_timeout(int sock, unsigned int msec);
722 LTTNG_HIDDEN int lttcomm_setsockopt_snd_timeout(int sock, unsigned int msec);
723
724 LTTNG_HIDDEN int lttcomm_sock_get_port(const struct lttcomm_sock *sock,
725 uint16_t *port);
726 /*
727 * Set a port to an lttcomm_sock. This will have no effect is the socket is
728 * already bound.
729 */
730 LTTNG_HIDDEN int lttcomm_sock_set_port(struct lttcomm_sock *sock, uint16_t port);
731
732 LTTNG_HIDDEN void lttcomm_init(void);
733 /* Get network timeout, in milliseconds */
734 LTTNG_HIDDEN unsigned long lttcomm_get_network_timeout(void);
735
736 #endif /* _LTTNG_SESSIOND_COMM_H */
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