2 * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
3 * Copyright (C) 2011 Julien Desfossez <julien.desfossez@polymtl.ca>
4 * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
6 * SPDX-License-Identifier: GPL-2.0-only
11 * This header is meant for liblttng and libust internal use ONLY. These
12 * declarations should NOT be considered stable API.
15 #ifndef _LTTNG_SESSIOND_COMM_H
16 #define _LTTNG_SESSIOND_COMM_H
19 #include <lttng/lttng.h>
20 #include <lttng/snapshot-internal.h>
21 #include <lttng/save-internal.h>
22 #include <lttng/channel-internal.h>
23 #include <lttng/trigger/trigger-internal.h>
24 #include <lttng/rotate-internal.h>
25 #include <common/compat/socket.h>
26 #include <common/uri.h>
27 #include <common/defaults.h>
28 #include <common/uuid.h>
29 #include <common/macros.h>
30 #include <common/optional.h>
32 #include <arpa/inet.h>
33 #include <netinet/in.h>
38 #include <common/unix.h>
40 /* Queue size of listen(2) */
41 #define LTTNG_SESSIOND_COMM_MAX_LISTEN 64
43 /* Maximum number of FDs that can be sent over a Unix socket */
44 #if defined(__linux__)
45 /* Based on the kernel's SCM_MAX_FD which is 253 since 2.6.38 (255 before) */
46 #define LTTCOMM_MAX_SEND_FDS 253
48 #define LTTCOMM_MAX_SEND_FDS 16
52 * Get the error code index from 0 since LTTCOMM_OK start at 1000
54 #define LTTCOMM_ERR_INDEX(code) (code - LTTCOMM_CONSUMERD_COMMAND_SOCK_READY)
56 enum lttcomm_sessiond_command
{
58 LTTNG_ADD_CONTEXT
= 0,
59 /* LTTNG_CALIBRATE used to be here */
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,
66 /* Session daemon command */
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,
80 LTTNG_DISABLE_CONSUMER
= 19,
81 LTTNG_ENABLE_CONSUMER
= 20,
82 LTTNG_SET_CONSUMER_URI
= 21,
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,
92 LTTNG_SAVE_SESSION
= 31,
93 LTTNG_PROCESS_ATTR_TRACKER_ADD_INCLUDE_VALUE
= 32,
94 LTTNG_PROCESS_ATTR_TRACKER_REMOVE_INCLUDE_VALUE
= 33,
95 LTTNG_PROCESS_ATTR_TRACKER_GET_POLICY
= 34,
96 LTTNG_PROCESS_ATTR_TRACKER_SET_POLICY
= 35,
97 LTTNG_PROCESS_ATTR_TRACKER_GET_INCLUSION_SET
= 36,
98 LTTNG_SET_SESSION_SHM_PATH
= 40,
99 LTTNG_REGENERATE_METADATA
= 41,
100 LTTNG_REGENERATE_STATEDUMP
= 42,
101 LTTNG_REGISTER_TRIGGER
= 43,
102 LTTNG_UNREGISTER_TRIGGER
= 44,
103 LTTNG_ROTATE_SESSION
= 45,
104 LTTNG_ROTATION_GET_INFO
= 46,
105 LTTNG_ROTATION_SET_SCHEDULE
= 47,
106 LTTNG_SESSION_LIST_ROTATION_SCHEDULES
= 48,
107 LTTNG_CREATE_SESSION_EXT
= 49,
108 LTTNG_CLEAR_SESSION
= 50,
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,
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 set of stream files (2.11+) */
133 RELAYD_ROTATE_STREAMS
= 18,
134 /* Ask the relay to create a trace chunk (2.11+) */
135 RELAYD_CREATE_TRACE_CHUNK
= 19,
136 /* Ask the relay to close a trace chunk (2.11+) */
137 RELAYD_CLOSE_TRACE_CHUNK
= 20,
138 /* Ask the relay whether a trace chunk exists (2.11+) */
139 RELAYD_TRACE_CHUNK_EXISTS
= 21,
140 /* Get the current configuration of a relayd peer (2.12+) */
141 RELAYD_GET_CONFIGURATION
= 22,
143 /* Feature branch specific commands start at 10000. */
147 * lttcomm error code.
149 enum lttcomm_return_code
{
150 LTTCOMM_CONSUMERD_SUCCESS
= 0, /* Everything went fine. */
152 * Some code paths use -1 to express an error, others
153 * negate this consumer return code. Starting codes at
154 * 100 ensures there is no mix-up between this error value
155 * and legitimate status codes.
157 LTTCOMM_CONSUMERD_COMMAND_SOCK_READY
= 100, /* Command socket ready */
158 LTTCOMM_CONSUMERD_SUCCESS_RECV_FD
, /* Success on receiving fds */
159 LTTCOMM_CONSUMERD_ERROR_RECV_FD
, /* Error on receiving fds */
160 LTTCOMM_CONSUMERD_ERROR_RECV_CMD
, /* Error on receiving command */
161 LTTCOMM_CONSUMERD_POLL_ERROR
, /* Error in polling thread */
162 LTTCOMM_CONSUMERD_POLL_NVAL
, /* Poll on closed fd */
163 LTTCOMM_CONSUMERD_POLL_HUP
, /* All fds have hungup */
164 LTTCOMM_CONSUMERD_EXIT_SUCCESS
, /* Consumerd exiting normally */
165 LTTCOMM_CONSUMERD_EXIT_FAILURE
, /* Consumerd exiting on error */
166 LTTCOMM_CONSUMERD_OUTFD_ERROR
, /* Error opening the tracefile */
167 LTTCOMM_CONSUMERD_SPLICE_EBADF
, /* EBADF from splice(2) */
168 LTTCOMM_CONSUMERD_SPLICE_EINVAL
, /* EINVAL from splice(2) */
169 LTTCOMM_CONSUMERD_SPLICE_ENOMEM
, /* ENOMEM from splice(2) */
170 LTTCOMM_CONSUMERD_SPLICE_ESPIPE
, /* ESPIPE from splice(2) */
171 LTTCOMM_CONSUMERD_ENOMEM
, /* Consumer is out of memory */
172 LTTCOMM_CONSUMERD_ERROR_METADATA
, /* Error with metadata. */
173 LTTCOMM_CONSUMERD_FATAL
, /* Fatal error. */
174 LTTCOMM_CONSUMERD_RELAYD_FAIL
, /* Error on remote relayd */
175 LTTCOMM_CONSUMERD_CHANNEL_FAIL
, /* Channel creation failed. */
176 LTTCOMM_CONSUMERD_CHAN_NOT_FOUND
, /* Channel not found. */
177 LTTCOMM_CONSUMERD_ALREADY_SET
, /* Resource already set. */
178 LTTCOMM_CONSUMERD_ROTATION_FAIL
, /* Rotation has failed. */
179 LTTCOMM_CONSUMERD_SNAPSHOT_FAILED
, /* snapshot has failed. */
180 LTTCOMM_CONSUMERD_CREATE_TRACE_CHUNK_FAILED
,/* Trace chunk creation failed. */
181 LTTCOMM_CONSUMERD_CLOSE_TRACE_CHUNK_FAILED
, /* Trace chunk creation failed. */
182 LTTCOMM_CONSUMERD_INVALID_PARAMETERS
, /* Invalid parameters. */
183 LTTCOMM_CONSUMERD_TRACE_CHUNK_EXISTS_LOCAL
, /* Trace chunk exists on consumer daemon. */
184 LTTCOMM_CONSUMERD_TRACE_CHUNK_EXISTS_REMOTE
,/* Trace chunk exists on relay daemon. */
185 LTTCOMM_CONSUMERD_UNKNOWN_TRACE_CHUNK
, /* Unknown trace chunk. */
186 LTTCOMM_CONSUMERD_RELAYD_CLEAR_DISALLOWED
, /* Relayd does not accept clear command. */
187 LTTCOMM_CONSUMERD_UNKNOWN_ERROR
, /* Unknown error. */
189 /* MUST be last element */
190 LTTCOMM_NR
, /* Last element */
193 /* lttng socket protocol. */
194 enum lttcomm_sock_proto
{
200 * Index in the net_families array below. Please keep in sync!
202 enum lttcomm_sock_domain
{
207 enum lttcomm_metadata_command
{
208 LTTCOMM_METADATA_REQUEST
= 1,
212 * Commands sent from the consumerd to the sessiond to request if new metadata
213 * is available. This message is used to find the per UID _or_ per PID registry
214 * for the channel key. For per UID lookup, the triplet
215 * bits_per_long/uid/session_id is used. On lookup failure, we search for the
216 * per PID registry indexed by session id ignoring the other values.
218 struct lttcomm_metadata_request_msg
{
219 uint64_t session_id
; /* Tracing session id */
220 uint64_t session_id_per_pid
; /* Tracing session id for per-pid */
221 uint32_t bits_per_long
; /* Consumer ABI */
223 uint64_t key
; /* Metadata channel key. */
226 struct lttcomm_sockaddr
{
227 enum lttcomm_sock_domain type
;
229 struct sockaddr_in sin
;
230 struct sockaddr_in6 sin6
;
234 struct lttcomm_sock
{
236 enum lttcomm_sock_proto proto
;
237 struct lttcomm_sockaddr sockaddr
;
238 const struct lttcomm_proto_ops
*ops
;
242 * Relayd sock. Adds the protocol version to use for the communications with
245 struct lttcomm_relayd_sock
{
246 struct lttcomm_sock sock
;
251 struct lttcomm_net_family
{
253 int (*create
) (struct lttcomm_sock
*sock
, int type
, int proto
);
256 struct lttcomm_proto_ops
{
257 int (*bind
) (struct lttcomm_sock
*sock
);
258 int (*close
) (struct lttcomm_sock
*sock
);
259 int (*connect
) (struct lttcomm_sock
*sock
);
260 struct lttcomm_sock
*(*accept
) (struct lttcomm_sock
*sock
);
261 int (*listen
) (struct lttcomm_sock
*sock
, int backlog
);
262 ssize_t (*recvmsg
) (struct lttcomm_sock
*sock
, void *buf
, size_t len
,
264 ssize_t (*sendmsg
) (struct lttcomm_sock
*sock
, const void *buf
,
265 size_t len
, int flags
);
268 struct process_attr_integral_value_comm
{
276 * Data structure received from lttng client to session daemon.
278 struct lttcomm_session_msg
{
279 uint32_t cmd_type
; /* enum lttcomm_sessiond_command */
280 struct lttng_session session
;
281 struct lttng_domain domain
;
285 char channel_name
[LTTNG_SYMBOL_NAME_LEN
];
286 struct lttng_event event LTTNG_PACKED
;
287 /* Length of following filter expression. */
288 uint32_t expression_len
;
289 /* Length of following bytecode for filter. */
290 uint32_t bytecode_len
;
291 /* Exclusion count (fixed-size strings). */
292 uint32_t exclusion_count
;
293 /* Userspace probe location size. */
294 uint32_t userspace_probe_location_len
;
296 * After this structure, the following variable-length
297 * items are transmitted:
298 * - char exclusion_names[LTTNG_SYMBOL_NAME_LEN][exclusion_count]
299 * - char filter_expression[expression_len]
300 * - unsigned char filter_bytecode[bytecode_len]
302 } LTTNG_PACKED enable
;
304 char channel_name
[LTTNG_SYMBOL_NAME_LEN
];
305 struct lttng_event event LTTNG_PACKED
;
306 /* Length of following filter expression. */
307 uint32_t expression_len
;
308 /* Length of following bytecode for filter. */
309 uint32_t bytecode_len
;
311 * After this structure, the following variable-length
312 * items are transmitted:
313 * - unsigned char filter_expression[expression_len]
314 * - unsigned char filter_bytecode[bytecode_len]
316 } LTTNG_PACKED disable
;
319 struct lttng_channel chan LTTNG_PACKED
;
320 /* struct lttng_channel_extended is already packed. */
321 struct lttng_channel_extended extended
;
322 } LTTNG_PACKED channel
;
325 char channel_name
[LTTNG_SYMBOL_NAME_LEN
];
326 struct lttng_event_context ctx LTTNG_PACKED
;
327 uint32_t provider_name_len
;
328 uint32_t context_name_len
;
329 } LTTNG_PACKED context
;
330 /* Use by register_consumer */
336 char channel_name
[LTTNG_SYMBOL_NAME_LEN
];
338 struct lttng_calibrate calibrate
;
339 /* Used by the set_consumer_url and used by create_session also call */
341 /* Number of lttng_uri following */
345 struct lttng_snapshot_output output LTTNG_PACKED
;
346 } LTTNG_PACKED snapshot_output
;
349 struct lttng_snapshot_output output LTTNG_PACKED
;
350 } LTTNG_PACKED snapshot_record
;
353 unsigned int timer_interval
; /* usec */
354 } LTTNG_PACKED session_live
;
356 struct lttng_save_session_attr attr
; /* struct already packed */
357 } LTTNG_PACKED save_session
;
359 char shm_path
[PATH_MAX
];
360 } LTTNG_PACKED set_shm_path
;
362 /* enum lttng_process_attr */
363 int32_t process_attr
;
364 /* enum lttng_process_attr_value_type */
367 struct process_attr_integral_value_comm integral_value
;
369 * For user/group names, a variable length,
370 * zero-terminated, string of length 'name_len'
371 * (including the terminator) follows.
373 * integral_value should not be used in those cases.
376 } LTTNG_PACKED process_attr_tracker_add_remove_include_value
;
378 /* enum lttng_process_attr */
379 int32_t process_attr
;
380 } LTTNG_PACKED process_attr_tracker_get_inclusion_set
;
382 /* enum lttng_process_attr */
383 int32_t process_attr
;
384 } LTTNG_PACKED process_attr_tracker_get_tracking_policy
;
386 /* enum lttng_process_attr */
387 int32_t process_attr
;
388 /* enum lttng_tracking_policy */
389 int32_t tracking_policy
;
390 } LTTNG_PACKED process_attr_tracker_set_tracking_policy
;
393 } LTTNG_PACKED trigger
;
395 uint64_t rotation_id
;
396 } LTTNG_PACKED get_rotation_info
;
398 /* enum lttng_rotation_schedule_type */
401 * If set == 1, set schedule to value, if set == 0,
402 * clear this schedule type.
406 } LTTNG_PACKED rotation_set_schedule
;
409 * Includes the null-terminator.
410 * Must be an absolute path.
412 * Size bounded by LTTNG_PATH_MAX.
414 uint16_t home_dir_size
;
415 uint64_t session_descriptor_size
;
416 /* An lttng_session_descriptor follows. */
417 } LTTNG_PACKED create_session
;
419 /* Count of fds sent. */
423 #define LTTNG_FILTER_MAX_LEN 65536
424 #define LTTNG_SESSION_DESCRIPTOR_MAX_LEN 65536
427 * Filter bytecode data. The reloc table is located at the end of the
428 * bytecode. It is made of tuples: (uint16_t, var. len. string). It
429 * starts at reloc_table_offset.
431 #define LTTNG_FILTER_PADDING 32
432 struct lttng_filter_bytecode
{
433 uint32_t len
; /* len of data */
434 uint32_t reloc_table_offset
;
436 char padding
[LTTNG_FILTER_PADDING
];
441 * Event exclusion data. At the end of the structure, there will actually
442 * by zero or more names, where the actual number of names is given by
443 * the 'count' item of the structure.
445 #define LTTNG_EVENT_EXCLUSION_PADDING 32
446 struct lttng_event_exclusion
{
448 char padding
[LTTNG_EVENT_EXCLUSION_PADDING
];
449 char names
[0][LTTNG_SYMBOL_NAME_LEN
];
452 #define LTTNG_EVENT_EXCLUSION_NAME_AT(_exclusion, _i) \
453 (&(_exclusion)->names[_i][0])
456 * Event command header.
458 struct lttcomm_event_command_header
{
459 /* Number of events */
464 * Event extended info header. This is the structure preceding each
465 * extended info data.
467 struct lttcomm_event_extended_header
{
469 * Size of filter string immediately following this header.
470 * This size includes the terminal null character.
475 * Number of exclusion names, immediately following the filter
476 * string. Each exclusion name has a fixed length of
477 * LTTNG_SYMBOL_NAME_LEN bytes, including the terminal null
480 uint32_t nb_exclusions
;
483 * Size of the event's userspace probe location (if applicable).
485 uint32_t userspace_probe_location_len
;
489 * Command header of the reply to an LTTNG_DESTROY_SESSION command.
491 struct lttcomm_session_destroy_command_header
{
492 /* enum lttng_session */
493 int32_t rotation_state
;
497 * tracker command header.
499 struct lttcomm_tracker_command_header
{
500 uint32_t nb_tracker_id
;
504 * Data structure for the response from sessiond to the lttng client.
506 struct lttcomm_lttng_msg
{
507 uint32_t cmd_type
; /* enum lttcomm_sessiond_command */
508 uint32_t ret_code
; /* enum lttcomm_return_code */
509 uint32_t pid
; /* pid_t */
510 uint32_t cmd_header_size
;
515 struct lttcomm_lttng_output_id
{
520 * lttcomm_consumer_msg is the message sent from sessiond to consumerd
521 * to either add a channel, add a stream, update a stream, or stop
524 struct lttcomm_consumer_msg
{
525 uint32_t cmd_type
; /* enum lttng_consumer_command */
528 uint64_t channel_key
;
530 /* ID of the session's current trace chunk. */
531 LTTNG_OPTIONAL_COMM(uint64_t) LTTNG_PACKED chunk_id
;
532 char pathname
[PATH_MAX
];
534 /* nb_init_streams is the number of streams open initially. */
535 uint32_t nb_init_streams
;
536 char name
[LTTNG_SYMBOL_NAME_LEN
];
537 /* Use splice or mmap to consume this fd */
538 enum lttng_event_output output
;
539 int type
; /* Per cpu or metadata. */
540 uint64_t tracefile_size
; /* bytes */
541 uint32_t tracefile_count
; /* number of tracefiles */
542 /* If the channel's streams have to be monitored or not. */
544 /* timer to check the streams usage in live mode (usec). */
545 unsigned int live_timer_interval
;
546 /* is part of a live session */
548 /* timer to sample a channel's positions (usec). */
549 unsigned int monitor_timer_interval
;
550 } LTTNG_PACKED channel
; /* Only used by Kernel. */
553 uint64_t channel_key
;
554 int32_t cpu
; /* On which CPU this stream is assigned. */
555 /* Tells the consumer if the stream should be or not monitored. */
557 } LTTNG_PACKED stream
; /* Only used by Kernel. */
560 enum lttng_stream_type type
;
561 /* Open socket to the relayd */
562 struct lttcomm_relayd_sock sock
;
563 /* Tracing session id associated to the relayd. */
565 /* Relayd session id, only used with control socket. */
566 uint64_t relayd_session_id
;
567 } LTTNG_PACKED relayd_sock
;
569 uint64_t net_seq_idx
;
570 } LTTNG_PACKED destroy_relayd
;
573 } LTTNG_PACKED data_pending
;
575 uint64_t subbuf_size
; /* bytes */
576 uint64_t num_subbuf
; /* power of 2 */
577 int32_t overwrite
; /* 1: overwrite, 0: discard */
578 uint32_t switch_timer_interval
; /* usec */
579 uint32_t read_timer_interval
; /* usec */
580 unsigned int live_timer_interval
; /* usec */
581 uint8_t is_live
; /* is part of a live session */
582 uint32_t monitor_timer_interval
; /* usec */
583 int32_t output
; /* splice, mmap */
584 int32_t type
; /* metadata or per_cpu */
585 uint64_t session_id
; /* Tracing session id */
586 char pathname
[PATH_MAX
]; /* Channel file path. */
587 char name
[LTTNG_SYMBOL_NAME_LEN
]; /* Channel name. */
588 /* Credentials used to open the UST buffer shared mappings. */
592 } LTTNG_PACKED buffer_credentials
;
593 uint64_t relayd_id
; /* Relayd id if apply. */
594 uint64_t key
; /* Unique channel key. */
595 /* ID of the session's current trace chunk. */
596 LTTNG_OPTIONAL_COMM(uint64_t) LTTNG_PACKED chunk_id
;
597 unsigned char uuid
[LTTNG_UUID_LEN
]; /* uuid for ust tracer. */
598 uint32_t chan_id
; /* Channel ID on the tracer side. */
599 uint64_t tracefile_size
; /* bytes */
600 uint32_t tracefile_count
; /* number of tracefiles */
601 uint64_t session_id_per_pid
; /* Per-pid session ID. */
602 /* Tells the consumer if the stream should be or not monitored. */
605 * For UST per UID buffers, this is the application UID of the
606 * channel. This can be different from the user UID requesting the
607 * channel creation and used for the rights on the stream file
608 * because the application can be in the tracing for instance.
610 uint32_t ust_app_uid
;
611 int64_t blocking_timeout
;
612 char root_shm_path
[PATH_MAX
];
613 char shm_path
[PATH_MAX
];
614 } LTTNG_PACKED ask_channel
;
617 } LTTNG_PACKED get_channel
;
620 } LTTNG_PACKED destroy_channel
;
622 uint64_t key
; /* Metadata channel key. */
623 uint64_t target_offset
; /* Offset in the consumer */
624 uint64_t len
; /* Length of metadata to be received. */
625 uint64_t version
; /* Version of the metadata. */
626 } LTTNG_PACKED push_metadata
;
628 uint64_t key
; /* Metadata channel key. */
629 } LTTNG_PACKED close_metadata
;
631 uint64_t key
; /* Metadata channel key. */
632 } LTTNG_PACKED setup_metadata
;
634 uint64_t key
; /* Channel key. */
635 } LTTNG_PACKED flush_channel
;
637 uint64_t key
; /* Channel key. */
638 } LTTNG_PACKED clear_quiescent_channel
;
640 char pathname
[PATH_MAX
];
641 /* Indicate if the snapshot goes on the relayd or locally. */
643 uint32_t metadata
; /* This a metadata snapshot. */
644 uint64_t relayd_id
; /* Relayd id if apply. */
646 uint64_t nb_packets_per_stream
;
647 } LTTNG_PACKED snapshot_channel
;
649 uint64_t channel_key
;
650 uint64_t net_seq_idx
;
651 } LTTNG_PACKED sent_streams
;
654 uint64_t channel_key
;
655 } LTTNG_PACKED discarded_events
;
658 uint64_t channel_key
;
659 } LTTNG_PACKED lost_packets
;
662 } LTTNG_PACKED regenerate_metadata
;
664 uint32_t metadata
; /* This is a metadata channel. */
665 uint64_t relayd_id
; /* Relayd id if apply. */
667 } LTTNG_PACKED rotate_channel
;
671 } LTTNG_PACKED check_rotation_pending_local
;
676 } LTTNG_PACKED check_rotation_pending_relay
;
679 * Relayd id, if applicable (remote).
681 * A directory file descriptor referring to the chunk's
682 * output folder is transmitted if the chunk is local
685 * `override_name` is left NULL (all-zeroes) if the
686 * chunk's name is not overridden.
688 LTTNG_OPTIONAL_COMM(uint64_t) LTTNG_PACKED relayd_id
;
689 char override_name
[LTTNG_NAME_MAX
];
692 uint64_t creation_timestamp
;
693 LTTNG_OPTIONAL_COMM(struct {
696 } LTTNG_PACKED
) LTTNG_PACKED credentials
;
697 } LTTNG_PACKED create_trace_chunk
;
699 LTTNG_OPTIONAL_COMM(uint64_t) LTTNG_PACKED relayd_id
;
702 uint64_t close_timestamp
;
703 /* enum lttng_trace_chunk_command_type */
704 LTTNG_OPTIONAL_COMM(uint32_t) LTTNG_PACKED close_command
;
705 } LTTNG_PACKED close_trace_chunk
;
707 LTTNG_OPTIONAL_COMM(uint64_t) LTTNG_PACKED relayd_id
;
710 } LTTNG_PACKED trace_chunk_exists
;
712 lttng_uuid sessiond_uuid
;
716 } LTTNG_PACKED clear_channel
;
719 } LTTNG_PACKED open_channel_packets
;
724 * Channel monitoring message returned to the session daemon on every
725 * monitor timer expiration.
727 struct lttcomm_consumer_channel_monitor_msg
{
728 /* Key of the sampled channel. */
731 * Lowest and highest usage (bytes) at the moment the sample was taken.
733 uint64_t lowest
, highest
;
735 * Sum of all the consumed positions for a channel.
737 uint64_t total_consumed
;
741 * Status message returned to the sessiond after a received command.
743 struct lttcomm_consumer_status_msg
{
744 enum lttcomm_return_code ret_code
;
747 struct lttcomm_consumer_status_channel
{
748 enum lttcomm_return_code ret_code
;
750 unsigned int stream_count
;
753 struct lttcomm_consumer_close_trace_chunk_reply
{
754 enum lttcomm_return_code ret_code
;
755 uint32_t path_length
;
759 #ifdef HAVE_LIBLTTNG_UST_CTL
761 #include <lttng/ust-abi.h>
764 * Data structure for the commands sent from sessiond to UST.
766 struct lttcomm_ust_msg
{
770 struct lttng_ust_channel channel
;
771 struct lttng_ust_stream stream
;
772 struct lttng_ust_event event
;
773 struct lttng_ust_context context
;
774 struct lttng_ust_tracer_version version
;
779 * Data structure for the response from UST to the session daemon.
780 * cmd_type is sent back in the reply for validation.
782 struct lttcomm_ust_reply
{
785 uint32_t ret_code
; /* enum lttcomm_return_code */
786 uint32_t ret_val
; /* return value */
789 uint64_t memory_map_size
;
790 } LTTNG_PACKED channel
;
792 uint64_t memory_map_size
;
793 } LTTNG_PACKED stream
;
794 struct lttng_ust_tracer_version version
;
798 #endif /* HAVE_LIBLTTNG_UST_CTL */
800 LTTNG_HIDDEN
const char *lttcomm_get_readable_code(enum lttcomm_return_code code
);
802 LTTNG_HIDDEN
int lttcomm_init_inet_sockaddr(struct lttcomm_sockaddr
*sockaddr
,
803 const char *ip
, unsigned int port
);
804 LTTNG_HIDDEN
int lttcomm_init_inet6_sockaddr(struct lttcomm_sockaddr
*sockaddr
,
805 const char *ip
, unsigned int port
);
807 LTTNG_HIDDEN
struct lttcomm_sock
*lttcomm_alloc_sock(enum lttcomm_sock_proto proto
);
808 LTTNG_HIDDEN
int lttcomm_create_sock(struct lttcomm_sock
*sock
);
809 LTTNG_HIDDEN
struct lttcomm_sock
*lttcomm_alloc_sock_from_uri(struct lttng_uri
*uri
);
810 LTTNG_HIDDEN
void lttcomm_destroy_sock(struct lttcomm_sock
*sock
);
811 LTTNG_HIDDEN
struct lttcomm_sock
*lttcomm_alloc_copy_sock(struct lttcomm_sock
*src
);
812 LTTNG_HIDDEN
void lttcomm_copy_sock(struct lttcomm_sock
*dst
,
813 struct lttcomm_sock
*src
);
815 /* Relayd socket object. */
816 LTTNG_HIDDEN
struct lttcomm_relayd_sock
*lttcomm_alloc_relayd_sock(
817 struct lttng_uri
*uri
, uint32_t major
, uint32_t minor
);
819 LTTNG_HIDDEN
int lttcomm_setsockopt_rcv_timeout(int sock
, unsigned int msec
);
820 LTTNG_HIDDEN
int lttcomm_setsockopt_snd_timeout(int sock
, unsigned int msec
);
822 LTTNG_HIDDEN
int lttcomm_sock_get_port(const struct lttcomm_sock
*sock
,
825 * Set a port to an lttcomm_sock. This will have no effect is the socket is
828 LTTNG_HIDDEN
int lttcomm_sock_set_port(struct lttcomm_sock
*sock
, uint16_t port
);
830 LTTNG_HIDDEN
void lttcomm_init(void);
831 /* Get network timeout, in milliseconds */
832 LTTNG_HIDDEN
unsigned long lttcomm_get_network_timeout(void);
834 #endif /* _LTTNG_SESSIOND_COMM_H */