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Cleanup: remove duplicated code in snapshot record command
[lttng-tools.git] / src / common / sessiond-comm / sessiond-comm.h
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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
60enum 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 /* 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 /* 29 */
95 /* 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 LTTNG_CREATE_SESSION_EXT = 49
110};
111
112enum 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 */
146enum 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 LTTCOMM_CONSUMERD_ROTATION_FAIL, /* Rotation has failed. */
170 LTTCOMM_CONSUMERD_ROTATE_RENAME_FAILED, /* Rotation rename has failed. */
171 LTTCOMM_CONSUMERD_ROTATION_PENDING_LOCAL_FAILED, /* Rotation pending relay failed. */
172 LTTCOMM_CONSUMERD_ROTATION_PENDING_RELAY_FAILED, /* Rotation pending relay failed. */
173 LTTCOMM_CONSUMERD_MKDIR_FAILED, /* mkdir has failed. */
174 LTTCOMM_CONSUMERD_SNAPSHOT_FAILED, /* snapshot has failed. */
175
176 /* MUST be last element */
177 LTTCOMM_NR, /* Last element */
178};
179
180/* lttng socket protocol. */
181enum lttcomm_sock_proto {
182 LTTCOMM_SOCK_UDP,
183 LTTCOMM_SOCK_TCP,
184};
185
186/*
187 * Index in the net_families array below. Please keep in sync!
188 */
189enum lttcomm_sock_domain {
190 LTTCOMM_INET = 0,
191 LTTCOMM_INET6 = 1,
192};
193
194enum lttcomm_metadata_command {
195 LTTCOMM_METADATA_REQUEST = 1,
196};
197
198/*
199 * Commands sent from the consumerd to the sessiond to request if new metadata
200 * is available. This message is used to find the per UID _or_ per PID registry
201 * for the channel key. For per UID lookup, the triplet
202 * bits_per_long/uid/session_id is used. On lookup failure, we search for the
203 * per PID registry indexed by session id ignoring the other values.
204 */
205struct lttcomm_metadata_request_msg {
206 uint64_t session_id; /* Tracing session id */
207 uint64_t session_id_per_pid; /* Tracing session id for per-pid */
208 uint32_t bits_per_long; /* Consumer ABI */
209 uint32_t uid;
210 uint64_t key; /* Metadata channel key. */
211} LTTNG_PACKED;
212
213struct lttcomm_sockaddr {
214 enum lttcomm_sock_domain type;
215 union {
216 struct sockaddr_in sin;
217 struct sockaddr_in6 sin6;
218 } addr;
219} LTTNG_PACKED;
220
221struct lttcomm_sock {
222 int32_t fd;
223 enum lttcomm_sock_proto proto;
224 struct lttcomm_sockaddr sockaddr;
225 const struct lttcomm_proto_ops *ops;
226} LTTNG_PACKED;
227
228/*
229 * Relayd sock. Adds the protocol version to use for the communications with
230 * the relayd.
231 */
232struct lttcomm_relayd_sock {
233 struct lttcomm_sock sock;
234 uint32_t major;
235 uint32_t minor;
236} LTTNG_PACKED;
237
238struct lttcomm_net_family {
239 int family;
240 int (*create) (struct lttcomm_sock *sock, int type, int proto);
241};
242
243struct lttcomm_proto_ops {
244 int (*bind) (struct lttcomm_sock *sock);
245 int (*close) (struct lttcomm_sock *sock);
246 int (*connect) (struct lttcomm_sock *sock);
247 struct lttcomm_sock *(*accept) (struct lttcomm_sock *sock);
248 int (*listen) (struct lttcomm_sock *sock, int backlog);
249 ssize_t (*recvmsg) (struct lttcomm_sock *sock, void *buf, size_t len,
250 int flags);
251 ssize_t (*sendmsg) (struct lttcomm_sock *sock, const void *buf,
252 size_t len, int flags);
253};
254
255/*
256 * Data structure received from lttng client to session daemon.
257 */
258struct lttcomm_session_msg {
259 uint32_t cmd_type; /* enum lttcomm_sessiond_command */
260 struct lttng_session session;
261 struct lttng_domain domain;
262 union {
263 /* Event data */
264 struct {
265 char channel_name[LTTNG_SYMBOL_NAME_LEN];
266 struct lttng_event event LTTNG_PACKED;
267 /* Length of following filter expression. */
268 uint32_t expression_len;
269 /* Length of following bytecode for filter. */
270 uint32_t bytecode_len;
271 /* Exclusion count (fixed-size strings). */
272 uint32_t exclusion_count;
273 /* Userspace probe location size. */
274 uint32_t userspace_probe_location_len;
275 /*
276 * After this structure, the following variable-length
277 * items are transmitted:
278 * - char exclusion_names[LTTNG_SYMBOL_NAME_LEN][exclusion_count]
279 * - char filter_expression[expression_len]
280 * - unsigned char filter_bytecode[bytecode_len]
281 */
282 } LTTNG_PACKED enable;
283 struct {
284 char channel_name[LTTNG_SYMBOL_NAME_LEN];
285 struct lttng_event event LTTNG_PACKED;
286 /* Length of following filter expression. */
287 uint32_t expression_len;
288 /* Length of following bytecode for filter. */
289 uint32_t bytecode_len;
290 /*
291 * After this structure, the following variable-length
292 * items are transmitted:
293 * - unsigned char filter_expression[expression_len]
294 * - unsigned char filter_bytecode[bytecode_len]
295 */
296 } LTTNG_PACKED disable;
297 /* Create channel */
298 struct {
299 struct lttng_channel chan LTTNG_PACKED;
300 /* struct lttng_channel_extended is already packed. */
301 struct lttng_channel_extended extended;
302 } LTTNG_PACKED channel;
303 /* Context */
304 struct {
305 char channel_name[LTTNG_SYMBOL_NAME_LEN];
306 struct lttng_event_context ctx LTTNG_PACKED;
307 uint32_t provider_name_len;
308 uint32_t context_name_len;
309 } LTTNG_PACKED context;
310 /* Use by register_consumer */
311 struct {
312 char path[PATH_MAX];
313 } LTTNG_PACKED reg;
314 /* List */
315 struct {
316 char channel_name[LTTNG_SYMBOL_NAME_LEN];
317 } LTTNG_PACKED list;
318 struct lttng_calibrate calibrate;
319 /* Used by the set_consumer_url and used by create_session also call */
320 struct {
321 /* Number of lttng_uri following */
322 uint32_t size;
323 } LTTNG_PACKED uri;
324 struct {
325 struct lttng_snapshot_output output LTTNG_PACKED;
326 } LTTNG_PACKED snapshot_output;
327 struct {
328 uint32_t wait;
329 struct lttng_snapshot_output output LTTNG_PACKED;
330 } LTTNG_PACKED snapshot_record;
331 struct {
332 uint32_t nb_uri;
333 unsigned int timer_interval; /* usec */
334 } LTTNG_PACKED session_live;
335 struct {
336 struct lttng_save_session_attr attr; /* struct already packed */
337 } LTTNG_PACKED save_session;
338 struct {
339 char shm_path[PATH_MAX];
340 } LTTNG_PACKED set_shm_path;
341 struct {
342 uint32_t pid;
343 } LTTNG_PACKED pid_tracker;
344 struct {
345 uint32_t length;
346 } LTTNG_PACKED trigger;
347 struct {
348 uint64_t rotation_id;
349 } LTTNG_PACKED get_rotation_info;
350 struct {
351 /* enum lttng_rotation_schedule_type */
352 uint8_t type;
353 /*
354 * If set == 1, set schedule to value, if set == 0,
355 * clear this schedule type.
356 */
357 uint8_t set;
358 uint64_t value;
359 } LTTNG_PACKED rotation_set_schedule;
360 struct {
361 /*
362 * Includes the null-terminator.
363 * Must be an absolute path.
364 *
365 * Size bounded by LTTNG_PATH_MAX.
366 */
367 uint16_t home_dir_size;
368 uint64_t session_descriptor_size;
369 /* An lttng_session_descriptor follows. */
370 } LTTNG_PACKED create_session;
371 } u;
372} LTTNG_PACKED;
373
374#define LTTNG_FILTER_MAX_LEN 65536
375#define LTTNG_SESSION_DESCRIPTOR_MAX_LEN 65536
376
377/*
378 * Filter bytecode data. The reloc table is located at the end of the
379 * bytecode. It is made of tuples: (uint16_t, var. len. string). It
380 * starts at reloc_table_offset.
381 */
382#define LTTNG_FILTER_PADDING 32
383struct lttng_filter_bytecode {
384 uint32_t len; /* len of data */
385 uint32_t reloc_table_offset;
386 uint64_t seqnum;
387 char padding[LTTNG_FILTER_PADDING];
388 char data[0];
389} LTTNG_PACKED;
390
391/*
392 * Event exclusion data. At the end of the structure, there will actually
393 * by zero or more names, where the actual number of names is given by
394 * the 'count' item of the structure.
395 */
396#define LTTNG_EVENT_EXCLUSION_PADDING 32
397struct lttng_event_exclusion {
398 uint32_t count;
399 char padding[LTTNG_EVENT_EXCLUSION_PADDING];
400 char names[0][LTTNG_SYMBOL_NAME_LEN];
401} LTTNG_PACKED;
402
403#define LTTNG_EVENT_EXCLUSION_NAME_AT(_exclusion, _i) \
404 (&(_exclusion)->names[_i][0])
405
406/*
407 * Event command header.
408 */
409struct lttcomm_event_command_header {
410 /* Number of events */
411 uint32_t nb_events;
412} LTTNG_PACKED;
413
414/*
415 * Event extended info header. This is the structure preceding each
416 * extended info data.
417 */
418struct lttcomm_event_extended_header {
419 /*
420 * Size of filter string immediately following this header.
421 * This size includes the terminal null character.
422 */
423 uint32_t filter_len;
424
425 /*
426 * Number of exclusion names, immediately following the filter
427 * string. Each exclusion name has a fixed length of
428 * LTTNG_SYMBOL_NAME_LEN bytes, including the terminal null
429 * character.
430 */
431 uint32_t nb_exclusions;
432
433 /*
434 * Size of the event's userspace probe location (if applicable).
435 */
436 uint32_t userspace_probe_location_len;
437} LTTNG_PACKED;
438
439/*
440 * Data structure for the response from sessiond to the lttng client.
441 */
442struct lttcomm_lttng_msg {
443 uint32_t cmd_type; /* enum lttcomm_sessiond_command */
444 uint32_t ret_code; /* enum lttcomm_return_code */
445 uint32_t pid; /* pid_t */
446 uint32_t cmd_header_size;
447 uint32_t data_size;
448} LTTNG_PACKED;
449
450struct lttcomm_lttng_output_id {
451 uint32_t id;
452} LTTNG_PACKED;
453
454/*
455 * lttcomm_consumer_msg is the message sent from sessiond to consumerd
456 * to either add a channel, add a stream, update a stream, or stop
457 * operation.
458 */
459struct lttcomm_consumer_msg {
460 uint32_t cmd_type; /* enum lttng_consumer_command */
461 union {
462 struct {
463 uint64_t channel_key;
464 uint64_t session_id;
465 char pathname[PATH_MAX];
466 uint32_t uid;
467 uint32_t gid;
468 uint64_t relayd_id;
469 /* nb_init_streams is the number of streams open initially. */
470 uint32_t nb_init_streams;
471 char name[LTTNG_SYMBOL_NAME_LEN];
472 /* Use splice or mmap to consume this fd */
473 enum lttng_event_output output;
474 int type; /* Per cpu or metadata. */
475 uint64_t tracefile_size; /* bytes */
476 uint32_t tracefile_count; /* number of tracefiles */
477 /* If the channel's streams have to be monitored or not. */
478 uint32_t monitor;
479 /* timer to check the streams usage in live mode (usec). */
480 unsigned int live_timer_interval;
481 /* timer to sample a channel's positions (usec). */
482 unsigned int monitor_timer_interval;
483 } LTTNG_PACKED channel; /* Only used by Kernel. */
484 struct {
485 uint64_t stream_key;
486 uint64_t channel_key;
487 int32_t cpu; /* On which CPU this stream is assigned. */
488 /* Tells the consumer if the stream should be or not monitored. */
489 uint32_t no_monitor;
490 /*
491 * The archive id that was "current" at the time this
492 * stream was created. This is used to determine
493 * whether a rotation request was sent before or after
494 * the creation of a stream.
495 */
496 uint64_t trace_archive_id;
497 } LTTNG_PACKED stream; /* Only used by Kernel. */
498 struct {
499 uint64_t net_index;
500 enum lttng_stream_type type;
501 /* Open socket to the relayd */
502 struct lttcomm_relayd_sock sock;
503 /* Tracing session id associated to the relayd. */
504 uint64_t session_id;
505 /* Relayd session id, only used with control socket. */
506 uint64_t relayd_session_id;
507 } LTTNG_PACKED relayd_sock;
508 struct {
509 uint64_t net_seq_idx;
510 } LTTNG_PACKED destroy_relayd;
511 struct {
512 uint64_t session_id;
513 } LTTNG_PACKED data_pending;
514 struct {
515 uint64_t subbuf_size; /* bytes */
516 uint64_t num_subbuf; /* power of 2 */
517 int32_t overwrite; /* 1: overwrite, 0: discard */
518 uint32_t switch_timer_interval; /* usec */
519 uint32_t read_timer_interval; /* usec */
520 unsigned int live_timer_interval; /* usec */
521 uint32_t monitor_timer_interval; /* usec */
522 int32_t output; /* splice, mmap */
523 int32_t type; /* metadata or per_cpu */
524 uint64_t session_id; /* Tracing session id */
525 char pathname[PATH_MAX]; /* Channel file path. */
526 char name[LTTNG_SYMBOL_NAME_LEN]; /* Channel name. */
527 uint32_t uid; /* User ID of the session */
528 uint32_t gid; /* Group ID ot the session */
529 uint64_t relayd_id; /* Relayd id if apply. */
530 uint64_t key; /* Unique channel key. */
531 unsigned char uuid[UUID_LEN]; /* uuid for ust tracer. */
532 uint32_t chan_id; /* Channel ID on the tracer side. */
533 uint64_t tracefile_size; /* bytes */
534 uint32_t tracefile_count; /* number of tracefiles */
535 uint64_t session_id_per_pid; /* Per-pid session ID. */
536 /* Tells the consumer if the stream should be or not monitored. */
537 uint32_t monitor;
538 /*
539 * For UST per UID buffers, this is the application UID of the
540 * channel. This can be different from the user UID requesting the
541 * channel creation and used for the rights on the stream file
542 * because the application can be in the tracing for instance.
543 */
544 uint32_t ust_app_uid;
545 int64_t blocking_timeout;
546 /*
547 * The archive id that was "current" at the time this
548 * channel was created. This is used to determine
549 * whether a rotation request was sent before or after
550 * the creation of a channel.
551 */
552 uint64_t trace_archive_id;
553 char root_shm_path[PATH_MAX];
554 char shm_path[PATH_MAX];
555 } LTTNG_PACKED ask_channel;
556 struct {
557 uint64_t key;
558 } LTTNG_PACKED get_channel;
559 struct {
560 uint64_t key;
561 } LTTNG_PACKED destroy_channel;
562 struct {
563 uint64_t key; /* Metadata channel key. */
564 uint64_t target_offset; /* Offset in the consumer */
565 uint64_t len; /* Length of metadata to be received. */
566 uint64_t version; /* Version of the metadata. */
567 } LTTNG_PACKED push_metadata;
568 struct {
569 uint64_t key; /* Metadata channel key. */
570 } LTTNG_PACKED close_metadata;
571 struct {
572 uint64_t key; /* Metadata channel key. */
573 } LTTNG_PACKED setup_metadata;
574 struct {
575 uint64_t key; /* Channel key. */
576 } LTTNG_PACKED flush_channel;
577 struct {
578 uint64_t key; /* Channel key. */
579 } LTTNG_PACKED clear_quiescent_channel;
580 struct {
581 char pathname[PATH_MAX];
582 /* Indicate if the snapshot goes on the relayd or locally. */
583 uint32_t use_relayd;
584 uint32_t metadata; /* This a metadata snapshot. */
585 uint64_t relayd_id; /* Relayd id if apply. */
586 uint64_t key;
587 uint64_t nb_packets_per_stream;
588 /*
589 * The session's current trace archive id is propagated
590 * since a snapshot triggers the creation of an
591 * ephemeral metadata stream.
592 */
593 uint64_t trace_archive_id;
594 } LTTNG_PACKED snapshot_channel;
595 struct {
596 uint64_t channel_key;
597 uint64_t net_seq_idx;
598 } LTTNG_PACKED sent_streams;
599 struct {
600 uint64_t session_id;
601 uint64_t channel_key;
602 } LTTNG_PACKED discarded_events;
603 struct {
604 uint64_t session_id;
605 uint64_t channel_key;
606 } LTTNG_PACKED lost_packets;
607 struct {
608 uint64_t session_id;
609 } LTTNG_PACKED regenerate_metadata;
610 struct {
611 char pathname[PATH_MAX];
612 uint32_t metadata; /* This is a metadata channel. */
613 uint64_t relayd_id; /* Relayd id if apply. */
614 uint64_t key;
615 uint64_t new_chunk_id;
616 } LTTNG_PACKED rotate_channel;
617 struct {
618 char old_path[LTTNG_PATH_MAX];
619 char new_path[LTTNG_PATH_MAX];
620 uint64_t relayd_id; /* Relayd id if apply. */
621 uint64_t session_id;
622 uint32_t uid;
623 uint32_t gid;
624 } LTTNG_PACKED rotate_rename;
625 struct {
626 uint64_t session_id;
627 uint64_t chunk_id;
628 } LTTNG_PACKED check_rotation_pending_local;
629 struct {
630 uint64_t relayd_id;
631 uint64_t session_id;
632 uint64_t chunk_id;
633 } LTTNG_PACKED check_rotation_pending_relay;
634 struct {
635 char path[LTTNG_PATH_MAX];
636 uint64_t relayd_id; /* Relayd id if apply. */
637 uint64_t session_id;
638 uint32_t uid;
639 uint32_t gid;
640 } LTTNG_PACKED mkdir;
641 } u;
642} LTTNG_PACKED;
643
644/*
645 * Channel monitoring message returned to the session daemon on every
646 * monitor timer expiration.
647 */
648struct lttcomm_consumer_channel_monitor_msg {
649 /* Key of the sampled channel. */
650 uint64_t key;
651 /*
652 * Lowest and highest usage (bytes) at the moment the sample was taken.
653 */
654 uint64_t lowest, highest;
655 /*
656 * Sum of all the consumed positions for a channel.
657 */
658 uint64_t total_consumed;
659} LTTNG_PACKED;
660
661/*
662 * Status message returned to the sessiond after a received command.
663 */
664struct lttcomm_consumer_status_msg {
665 enum lttcomm_return_code ret_code;
666} LTTNG_PACKED;
667
668struct lttcomm_consumer_status_channel {
669 enum lttcomm_return_code ret_code;
670 uint64_t key;
671 unsigned int stream_count;
672} LTTNG_PACKED;
673
674#ifdef HAVE_LIBLTTNG_UST_CTL
675
676#include <lttng/ust-abi.h>
677
678/*
679 * Data structure for the commands sent from sessiond to UST.
680 */
681struct lttcomm_ust_msg {
682 uint32_t handle;
683 uint32_t cmd;
684 union {
685 struct lttng_ust_channel channel;
686 struct lttng_ust_stream stream;
687 struct lttng_ust_event event;
688 struct lttng_ust_context context;
689 struct lttng_ust_tracer_version version;
690 } u;
691} LTTNG_PACKED;
692
693/*
694 * Data structure for the response from UST to the session daemon.
695 * cmd_type is sent back in the reply for validation.
696 */
697struct lttcomm_ust_reply {
698 uint32_t handle;
699 uint32_t cmd;
700 uint32_t ret_code; /* enum lttcomm_return_code */
701 uint32_t ret_val; /* return value */
702 union {
703 struct {
704 uint64_t memory_map_size;
705 } LTTNG_PACKED channel;
706 struct {
707 uint64_t memory_map_size;
708 } LTTNG_PACKED stream;
709 struct lttng_ust_tracer_version version;
710 } u;
711} LTTNG_PACKED;
712
713#endif /* HAVE_LIBLTTNG_UST_CTL */
714
715LTTNG_HIDDEN const char *lttcomm_get_readable_code(enum lttcomm_return_code code);
716
717LTTNG_HIDDEN int lttcomm_init_inet_sockaddr(struct lttcomm_sockaddr *sockaddr,
718 const char *ip, unsigned int port);
719LTTNG_HIDDEN int lttcomm_init_inet6_sockaddr(struct lttcomm_sockaddr *sockaddr,
720 const char *ip, unsigned int port);
721
722LTTNG_HIDDEN struct lttcomm_sock *lttcomm_alloc_sock(enum lttcomm_sock_proto proto);
723LTTNG_HIDDEN int lttcomm_create_sock(struct lttcomm_sock *sock);
724LTTNG_HIDDEN struct lttcomm_sock *lttcomm_alloc_sock_from_uri(struct lttng_uri *uri);
725LTTNG_HIDDEN void lttcomm_destroy_sock(struct lttcomm_sock *sock);
726LTTNG_HIDDEN struct lttcomm_sock *lttcomm_alloc_copy_sock(struct lttcomm_sock *src);
727LTTNG_HIDDEN void lttcomm_copy_sock(struct lttcomm_sock *dst,
728 struct lttcomm_sock *src);
729
730/* Relayd socket object. */
731LTTNG_HIDDEN struct lttcomm_relayd_sock *lttcomm_alloc_relayd_sock(
732 struct lttng_uri *uri, uint32_t major, uint32_t minor);
733
734LTTNG_HIDDEN int lttcomm_setsockopt_rcv_timeout(int sock, unsigned int msec);
735LTTNG_HIDDEN int lttcomm_setsockopt_snd_timeout(int sock, unsigned int msec);
736
737LTTNG_HIDDEN int lttcomm_sock_get_port(const struct lttcomm_sock *sock,
738 uint16_t *port);
739/*
740 * Set a port to an lttcomm_sock. This will have no effect is the socket is
741 * already bound.
742 */
743LTTNG_HIDDEN int lttcomm_sock_set_port(struct lttcomm_sock *sock, uint16_t port);
744
745LTTNG_HIDDEN void lttcomm_init(void);
746/* Get network timeout, in milliseconds */
747LTTNG_HIDDEN unsigned long lttcomm_get_network_timeout(void);
748
749#endif /* _LTTNG_SESSIOND_COMM_H */
LTTng 2.0 tools and control repository
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