consumerd: tag metadata channel as being part of a live session
[lttng-tools.git] / src / common / sessiond-comm / sessiond-comm.h
CommitLineData
6e3805e2 1/*
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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>
fac6795d 5 *
ab5be9fa 6 * SPDX-License-Identifier: GPL-2.0-only
ba999de0 7 *
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8 */
9
773168b7 10/*
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11 * This header is meant for liblttng and libust internal use ONLY. These
12 * declarations should NOT be considered stable API.
773168b7 13 */
fac6795d 14
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15#ifndef _LTTNG_SESSIOND_COMM_H
16#define _LTTNG_SESSIOND_COMM_H
17
fac6795d 18#include <limits.h>
f3ed775e 19#include <lttng/lttng.h>
da3c9ec1 20#include <lttng/snapshot-internal.h>
00c76cea 21#include <lttng/save-internal.h>
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22#include <lttng/channel-internal.h>
23#include <lttng/trigger/trigger-internal.h>
d88744a4 24#include <lttng/rotate-internal.h>
b17231c6 25#include <common/compat/socket.h>
a4b92340 26#include <common/uri.h>
ce2a9e76 27#include <common/defaults.h>
c70636a7 28#include <common/uuid.h>
aa52c986 29#include <common/macros.h>
d2956687 30#include <common/optional.h>
5e16da05 31
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32#include <arpa/inet.h>
33#include <netinet/in.h>
34#include <sys/un.h>
35
36#include "inet.h"
37#include "inet6.h"
2038dd6c 38#include <common/unix.h>
0d37f2bc 39
fac6795d 40/* Queue size of listen(2) */
f158a754 41#define LTTNG_SESSIOND_COMM_MAX_LISTEN 64
fac6795d 42
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43/* Maximum number of FDs that can be sent over a Unix socket */
44#define LTTCOMM_MAX_SEND_FDS 4
45
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46/*
47 * Get the error code index from 0 since LTTCOMM_OK start at 1000
fac6795d 48 */
f73fabfd 49#define LTTCOMM_ERR_INDEX(code) (code - LTTCOMM_CONSUMERD_COMMAND_SOCK_READY)
fac6795d 50
6abb15de 51enum lttcomm_sessiond_command {
0d0c377a 52 /* Tracer command */
159b042f 53 LTTNG_ADD_CONTEXT = 0,
b812e5ca 54 /* LTTNG_CALIBRATE used to be here */
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55 LTTNG_DISABLE_CHANNEL = 2,
56 LTTNG_DISABLE_EVENT = 3,
57 LTTNG_LIST_SYSCALLS = 4,
58 LTTNG_ENABLE_CHANNEL = 5,
59 LTTNG_ENABLE_EVENT = 6,
18a720cd 60 /* 7 */
0d0c377a 61 /* Session daemon command */
b178f53e 62 /* 8 */
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63 LTTNG_DESTROY_SESSION = 9,
64 LTTNG_LIST_CHANNELS = 10,
65 LTTNG_LIST_DOMAINS = 11,
66 LTTNG_LIST_EVENTS = 12,
67 LTTNG_LIST_SESSIONS = 13,
68 LTTNG_LIST_TRACEPOINTS = 14,
69 LTTNG_REGISTER_CONSUMER = 15,
70 LTTNG_START_TRACE = 16,
71 LTTNG_STOP_TRACE = 17,
72 LTTNG_LIST_TRACEPOINT_FIELDS = 18,
53a80697 73
de5e9086 74 /* Consumer */
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75 LTTNG_DISABLE_CONSUMER = 19,
76 LTTNG_ENABLE_CONSUMER = 20,
77 LTTNG_SET_CONSUMER_URI = 21,
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78 /* 22 */
79 /* 23 */
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80 LTTNG_DATA_PENDING = 24,
81 LTTNG_SNAPSHOT_ADD_OUTPUT = 25,
82 LTTNG_SNAPSHOT_DEL_OUTPUT = 26,
83 LTTNG_SNAPSHOT_LIST_OUTPUT = 27,
84 LTTNG_SNAPSHOT_RECORD = 28,
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85 /* 29 */
86 /* 30 */
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87 LTTNG_SAVE_SESSION = 31,
88 LTTNG_PROCESS_ATTR_TRACKER_ADD_INCLUDE_VALUE = 32,
89 LTTNG_PROCESS_ATTR_TRACKER_REMOVE_INCLUDE_VALUE = 33,
90 LTTNG_PROCESS_ATTR_TRACKER_GET_POLICY = 34,
91 LTTNG_PROCESS_ATTR_TRACKER_SET_POLICY = 35,
92 LTTNG_PROCESS_ATTR_TRACKER_GET_INCLUSION_SET = 36,
93 LTTNG_SET_SESSION_SHM_PATH = 40,
94 LTTNG_REGENERATE_METADATA = 41,
95 LTTNG_REGENERATE_STATEDUMP = 42,
96 LTTNG_REGISTER_TRIGGER = 43,
97 LTTNG_UNREGISTER_TRIGGER = 44,
98 LTTNG_ROTATE_SESSION = 45,
99 LTTNG_ROTATION_GET_INFO = 46,
100 LTTNG_ROTATION_SET_SCHEDULE = 47,
101 LTTNG_SESSION_LIST_ROTATION_SCHEDULES = 48,
102 LTTNG_CREATE_SESSION_EXT = 49,
103 LTTNG_CLEAR_SESSION = 50,
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104};
105
106enum lttcomm_relayd_command {
107 RELAYD_ADD_STREAM = 1,
108 RELAYD_CREATE_SESSION = 2,
109 RELAYD_START_DATA = 3,
110 RELAYD_UPDATE_SYNC_INFO = 4,
111 RELAYD_VERSION = 5,
112 RELAYD_SEND_METADATA = 6,
113 RELAYD_CLOSE_STREAM = 7,
114 RELAYD_DATA_PENDING = 8,
115 RELAYD_QUIESCENT_CONTROL = 9,
116 RELAYD_BEGIN_DATA_PENDING = 10,
117 RELAYD_END_DATA_PENDING = 11,
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118 RELAYD_ADD_INDEX = 12,
119 RELAYD_SEND_INDEX = 13,
120 RELAYD_CLOSE_INDEX = 14,
a4baae1b 121 /* Live-reading commands (2.4+). */
d3e2ba59 122 RELAYD_LIST_SESSIONS = 15,
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123 /* All streams of the channel have been sent to the relayd (2.4+). */
124 RELAYD_STREAMS_SENT = 16,
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125 /* Ask the relay to reset the metadata trace file (2.8+) */
126 RELAYD_RESET_METADATA = 17,
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127 /* Ask the relay to rotate a set of stream files (2.11+) */
128 RELAYD_ROTATE_STREAMS = 18,
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129 /* Ask the relay to create a trace chunk (2.11+) */
130 RELAYD_CREATE_TRACE_CHUNK = 19,
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131 /* Ask the relay to close a trace chunk (2.11+) */
132 RELAYD_CLOSE_TRACE_CHUNK = 20,
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133 /* Ask the relay whether a trace chunk exists (2.11+) */
134 RELAYD_TRACE_CHUNK_EXISTS = 21,
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135 /* Get the current configuration of a relayd peer (2.12+) */
136 RELAYD_GET_CONFIGURATION = 22,
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137
138 /* Feature branch specific commands start at 10000. */
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139};
140
141/*
142 * lttcomm error code.
143 */
144enum lttcomm_return_code {
0c759fc9 145 LTTCOMM_CONSUMERD_SUCCESS = 0, /* Everything went fine. */
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146 /*
147 * Some code paths use -1 to express an error, others
148 * negate this consumer return code. Starting codes at
149 * 100 ensures there is no mix-up between this error value
150 * and legitimate status codes.
151 */
152 LTTCOMM_CONSUMERD_COMMAND_SOCK_READY = 100, /* Command socket ready */
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153 LTTCOMM_CONSUMERD_SUCCESS_RECV_FD, /* Success on receiving fds */
154 LTTCOMM_CONSUMERD_ERROR_RECV_FD, /* Error on receiving fds */
155 LTTCOMM_CONSUMERD_ERROR_RECV_CMD, /* Error on receiving command */
156 LTTCOMM_CONSUMERD_POLL_ERROR, /* Error in polling thread */
157 LTTCOMM_CONSUMERD_POLL_NVAL, /* Poll on closed fd */
158 LTTCOMM_CONSUMERD_POLL_HUP, /* All fds have hungup */
159 LTTCOMM_CONSUMERD_EXIT_SUCCESS, /* Consumerd exiting normally */
160 LTTCOMM_CONSUMERD_EXIT_FAILURE, /* Consumerd exiting on error */
161 LTTCOMM_CONSUMERD_OUTFD_ERROR, /* Error opening the tracefile */
162 LTTCOMM_CONSUMERD_SPLICE_EBADF, /* EBADF from splice(2) */
163 LTTCOMM_CONSUMERD_SPLICE_EINVAL, /* EINVAL from splice(2) */
164 LTTCOMM_CONSUMERD_SPLICE_ENOMEM, /* ENOMEM from splice(2) */
165 LTTCOMM_CONSUMERD_SPLICE_ESPIPE, /* ESPIPE from splice(2) */
ffe60014 166 LTTCOMM_CONSUMERD_ENOMEM, /* Consumer is out of memory */
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167 LTTCOMM_CONSUMERD_ERROR_METADATA, /* Error with metadata. */
168 LTTCOMM_CONSUMERD_FATAL, /* Fatal error. */
618a6a28 169 LTTCOMM_CONSUMERD_RELAYD_FAIL, /* Error on remote relayd */
0c759fc9 170 LTTCOMM_CONSUMERD_CHANNEL_FAIL, /* Channel creation failed. */
e462382a 171 LTTCOMM_CONSUMERD_CHAN_NOT_FOUND, /* Channel not found. */
e9404c27 172 LTTCOMM_CONSUMERD_ALREADY_SET, /* Resource already set. */
92b7a7f8 173 LTTCOMM_CONSUMERD_ROTATION_FAIL, /* Rotation has failed. */
3eb928aa 174 LTTCOMM_CONSUMERD_SNAPSHOT_FAILED, /* snapshot has failed. */
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175 LTTCOMM_CONSUMERD_CREATE_TRACE_CHUNK_FAILED,/* Trace chunk creation failed. */
176 LTTCOMM_CONSUMERD_CLOSE_TRACE_CHUNK_FAILED, /* Trace chunk creation failed. */
177 LTTCOMM_CONSUMERD_INVALID_PARAMETERS, /* Invalid parameters. */
178 LTTCOMM_CONSUMERD_TRACE_CHUNK_EXISTS_LOCAL, /* Trace chunk exists on consumer daemon. */
179 LTTCOMM_CONSUMERD_TRACE_CHUNK_EXISTS_REMOTE,/* Trace chunk exists on relay daemon. */
180 LTTCOMM_CONSUMERD_UNKNOWN_TRACE_CHUNK, /* Unknown trace chunk. */
b01b201a 181 LTTCOMM_CONSUMERD_RELAYD_CLEAR_DISALLOWED, /* Relayd does not accept clear command. */
80e327fa 182
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183 /* MUST be last element */
184 LTTCOMM_NR, /* Last element */
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185};
186
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187/* lttng socket protocol. */
188enum lttcomm_sock_proto {
189 LTTCOMM_SOCK_UDP,
190 LTTCOMM_SOCK_TCP,
191};
192
193/*
194 * Index in the net_families array below. Please keep in sync!
195 */
196enum lttcomm_sock_domain {
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197 LTTCOMM_INET = 0,
198 LTTCOMM_INET6 = 1,
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199};
200
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201enum lttcomm_metadata_command {
202 LTTCOMM_METADATA_REQUEST = 1,
203};
204
205/*
206 * Commands sent from the consumerd to the sessiond to request if new metadata
207 * is available. This message is used to find the per UID _or_ per PID registry
208 * for the channel key. For per UID lookup, the triplet
209 * bits_per_long/uid/session_id is used. On lookup failure, we search for the
210 * per PID registry indexed by session id ignoring the other values.
211 */
212struct lttcomm_metadata_request_msg {
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213 uint64_t session_id; /* Tracing session id */
214 uint64_t session_id_per_pid; /* Tracing session id for per-pid */
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215 uint32_t bits_per_long; /* Consumer ABI */
216 uint32_t uid;
217 uint64_t key; /* Metadata channel key. */
218} LTTNG_PACKED;
219
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220struct lttcomm_sockaddr {
221 enum lttcomm_sock_domain type;
222 union {
223 struct sockaddr_in sin;
224 struct sockaddr_in6 sin6;
225 } addr;
fc5e05b7 226} LTTNG_PACKED;
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227
228struct lttcomm_sock {
d88aee68 229 int32_t fd;
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230 enum lttcomm_sock_proto proto;
231 struct lttcomm_sockaddr sockaddr;
232 const struct lttcomm_proto_ops *ops;
fc5e05b7 233} LTTNG_PACKED;
de5e9086 234
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235/*
236 * Relayd sock. Adds the protocol version to use for the communications with
237 * the relayd.
238 */
239struct lttcomm_relayd_sock {
240 struct lttcomm_sock sock;
241 uint32_t major;
242 uint32_t minor;
243} LTTNG_PACKED;
244
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245struct lttcomm_net_family {
246 int family;
247 int (*create) (struct lttcomm_sock *sock, int type, int proto);
248};
249
250struct lttcomm_proto_ops {
251 int (*bind) (struct lttcomm_sock *sock);
252 int (*close) (struct lttcomm_sock *sock);
253 int (*connect) (struct lttcomm_sock *sock);
254 struct lttcomm_sock *(*accept) (struct lttcomm_sock *sock);
255 int (*listen) (struct lttcomm_sock *sock, int backlog);
256 ssize_t (*recvmsg) (struct lttcomm_sock *sock, void *buf, size_t len,
257 int flags);
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258 ssize_t (*sendmsg) (struct lttcomm_sock *sock, const void *buf,
259 size_t len, int flags);
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260};
261
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262struct process_attr_integral_value_comm {
263 union {
264 int64_t _signed;
265 uint64_t _unsigned;
266 } u;
267} LTTNG_PACKED;
268
fac6795d 269/*
9bda164d 270 * Data structure received from lttng client to session daemon.
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271 */
272struct lttcomm_session_msg {
d0b96690 273 uint32_t cmd_type; /* enum lttcomm_sessiond_command */
42abccdb 274 struct lttng_session session;
9f19cc17 275 struct lttng_domain domain;
fac6795d 276 union {
f3ed775e 277 /* Event data */
fac6795d 278 struct {
db8870ed 279 char channel_name[LTTNG_SYMBOL_NAME_LEN];
1179a48f 280 struct lttng_event event LTTNG_PACKED;
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281 /* Length of following filter expression. */
282 uint32_t expression_len;
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283 /* Length of following bytecode for filter. */
284 uint32_t bytecode_len;
15e37663 285 /* Exclusion count (fixed-size strings). */
a5516688 286 uint32_t exclusion_count;
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287 /* Userspace probe location size. */
288 uint32_t userspace_probe_location_len;
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289 /*
290 * After this structure, the following variable-length
291 * items are transmitted:
292 * - char exclusion_names[LTTNG_SYMBOL_NAME_LEN][exclusion_count]
15e37663 293 * - char filter_expression[expression_len]
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294 * - unsigned char filter_bytecode[bytecode_len]
295 */
fc5e05b7 296 } LTTNG_PACKED enable;
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297 struct {
298 char channel_name[LTTNG_SYMBOL_NAME_LEN];
299 struct lttng_event event LTTNG_PACKED;
300 /* Length of following filter expression. */
301 uint32_t expression_len;
302 /* Length of following bytecode for filter. */
303 uint32_t bytecode_len;
304 /*
305 * After this structure, the following variable-length
306 * items are transmitted:
307 * - unsigned char filter_expression[expression_len]
308 * - unsigned char filter_bytecode[bytecode_len]
309 */
310 } LTTNG_PACKED disable;
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311 /* Create channel */
312 struct {
1179a48f 313 struct lttng_channel chan LTTNG_PACKED;
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314 /* struct lttng_channel_extended is already packed. */
315 struct lttng_channel_extended extended;
fc5e05b7 316 } LTTNG_PACKED channel;
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317 /* Context */
318 struct {
db8870ed 319 char channel_name[LTTNG_SYMBOL_NAME_LEN];
1179a48f 320 struct lttng_event_context ctx LTTNG_PACKED;
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321 uint32_t provider_name_len;
322 uint32_t context_name_len;
fc5e05b7 323 } LTTNG_PACKED context;
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324 /* Use by register_consumer */
325 struct {
326 char path[PATH_MAX];
fc5e05b7 327 } LTTNG_PACKED reg;
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328 /* List */
329 struct {
db8870ed 330 char channel_name[LTTNG_SYMBOL_NAME_LEN];
fc5e05b7 331 } LTTNG_PACKED list;
d0254c7c 332 struct lttng_calibrate calibrate;
a4b92340 333 /* Used by the set_consumer_url and used by create_session also call */
de5e9086 334 struct {
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335 /* Number of lttng_uri following */
336 uint32_t size;
fc5e05b7 337 } LTTNG_PACKED uri;
da3c9ec1 338 struct {
1179a48f 339 struct lttng_snapshot_output output LTTNG_PACKED;
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340 } LTTNG_PACKED snapshot_output;
341 struct {
342 uint32_t wait;
1179a48f 343 struct lttng_snapshot_output output LTTNG_PACKED;
da3c9ec1 344 } LTTNG_PACKED snapshot_record;
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345 struct {
346 uint32_t nb_uri;
347 unsigned int timer_interval; /* usec */
348 } LTTNG_PACKED session_live;
00c76cea 349 struct {
1179a48f 350 struct lttng_save_session_attr attr; /* struct already packed */
00c76cea 351 } LTTNG_PACKED save_session;
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MD
352 struct {
353 char shm_path[PATH_MAX];
354 } LTTNG_PACKED set_shm_path;
ccf10263 355 struct {
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356 /* enum lttng_process_attr */
357 int32_t process_attr;
358 /* enum lttng_process_attr_value_type */
359 int32_t value_type;
360
361 struct process_attr_integral_value_comm integral_value;
55c9e7ca 362 /*
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363 * For user/group names, a variable length,
364 * zero-terminated, string of length 'name_len'
365 * (including the terminator) follows.
366 *
367 * integral_value should not be used in those cases.
55c9e7ca 368 */
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369 uint32_t name_len;
370 } LTTNG_PACKED process_attr_tracker_add_remove_include_value;
55c9e7ca 371 struct {
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372 /* enum lttng_process_attr */
373 int32_t process_attr;
374 } LTTNG_PACKED process_attr_tracker_get_inclusion_set;
375 struct {
376 /* enum lttng_process_attr */
377 int32_t process_attr;
378 } LTTNG_PACKED process_attr_tracker_get_tracking_policy;
379 struct {
380 /* enum lttng_process_attr */
381 int32_t process_attr;
382 /* enum lttng_tracking_policy */
383 int32_t tracking_policy;
384 } LTTNG_PACKED process_attr_tracker_set_tracking_policy;
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385 struct {
386 uint32_t length;
387 } LTTNG_PACKED trigger;
d88744a4 388 struct {
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389 uint64_t rotation_id;
390 } LTTNG_PACKED get_rotation_info;
259c2674 391 struct {
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392 /* enum lttng_rotation_schedule_type */
393 uint8_t type;
394 /*
395 * If set == 1, set schedule to value, if set == 0,
396 * clear this schedule type.
397 */
398 uint8_t set;
399 uint64_t value;
400 } LTTNG_PACKED rotation_set_schedule;
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401 struct {
402 /*
403 * Includes the null-terminator.
404 * Must be an absolute path.
405 *
406 * Size bounded by LTTNG_PATH_MAX.
407 */
408 uint16_t home_dir_size;
409 uint64_t session_descriptor_size;
410 /* An lttng_session_descriptor follows. */
411 } LTTNG_PACKED create_session;
fac6795d 412 } u;
fc5e05b7 413} LTTNG_PACKED;
fac6795d 414
d93c4f1f 415#define LTTNG_FILTER_MAX_LEN 65536
b178f53e 416#define LTTNG_SESSION_DESCRIPTOR_MAX_LEN 65536
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MD
417
418/*
419 * Filter bytecode data. The reloc table is located at the end of the
420 * bytecode. It is made of tuples: (uint16_t, var. len. string). It
421 * starts at reloc_table_offset.
422 */
b6bbed5f 423#define LTTNG_FILTER_PADDING 32
53a80697 424struct lttng_filter_bytecode {
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425 uint32_t len; /* len of data */
426 uint32_t reloc_table_offset;
f3f0db50 427 uint64_t seqnum;
b6bbed5f 428 char padding[LTTNG_FILTER_PADDING];
53a80697 429 char data[0];
fc5e05b7 430} LTTNG_PACKED;
53a80697 431
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432/*
433 * Event exclusion data. At the end of the structure, there will actually
434 * by zero or more names, where the actual number of names is given by
435 * the 'count' item of the structure.
436 */
437#define LTTNG_EVENT_EXCLUSION_PADDING 32
438struct lttng_event_exclusion {
439 uint32_t count;
440 char padding[LTTNG_EVENT_EXCLUSION_PADDING];
caafa356 441 char names[0][LTTNG_SYMBOL_NAME_LEN];
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442} LTTNG_PACKED;
443
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PP
444#define LTTNG_EVENT_EXCLUSION_NAME_AT(_exclusion, _i) \
445 (&(_exclusion)->names[_i][0])
446
b4e3ceb9
PP
447/*
448 * Event command header.
449 */
450struct lttcomm_event_command_header {
451 /* Number of events */
452 uint32_t nb_events;
453} LTTNG_PACKED;
454
455/*
456 * Event extended info header. This is the structure preceding each
457 * extended info data.
458 */
459struct lttcomm_event_extended_header {
460 /*
461 * Size of filter string immediately following this header.
462 * This size includes the terminal null character.
463 */
464 uint32_t filter_len;
795d57ce
PP
465
466 /*
467 * Number of exclusion names, immediately following the filter
468 * string. Each exclusion name has a fixed length of
469 * LTTNG_SYMBOL_NAME_LEN bytes, including the terminal null
470 * character.
471 */
472 uint32_t nb_exclusions;
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473
474 /*
475 * Size of the event's userspace probe location (if applicable).
476 */
477 uint32_t userspace_probe_location_len;
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PP
478} LTTNG_PACKED;
479
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480/*
481 * Command header of the reply to an LTTNG_DESTROY_SESSION command.
482 */
483struct lttcomm_session_destroy_command_header {
484 /* enum lttng_session */
485 int32_t rotation_state;
486};
487
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JR
488/*
489 * tracker command header.
490 */
491struct lttcomm_tracker_command_header {
492 uint32_t nb_tracker_id;
493} LTTNG_PACKED;
494
fac6795d 495/*
5e16da05 496 * Data structure for the response from sessiond to the lttng client.
fac6795d 497 */
5461b305 498struct lttcomm_lttng_msg {
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499 uint32_t cmd_type; /* enum lttcomm_sessiond_command */
500 uint32_t ret_code; /* enum lttcomm_return_code */
501 uint32_t pid; /* pid_t */
795a978d 502 uint32_t cmd_header_size;
773168b7 503 uint32_t data_size;
fc5e05b7 504} LTTNG_PACKED;
fac6795d 505
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506struct lttcomm_lttng_output_id {
507 uint32_t id;
508} LTTNG_PACKED;
509
6e3805e2 510/*
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511 * lttcomm_consumer_msg is the message sent from sessiond to consumerd
512 * to either add a channel, add a stream, update a stream, or stop
513 * operation.
6e3805e2 514 */
3bd1e081 515struct lttcomm_consumer_msg {
92816cc3 516 uint32_t cmd_type; /* enum lttng_consumer_command */
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MD
517 union {
518 struct {
d88aee68 519 uint64_t channel_key;
ffe60014 520 uint64_t session_id;
d2956687 521 /* ID of the session's current trace chunk. */
0a30bf9b 522 LTTNG_OPTIONAL_COMM(uint64_t) LTTNG_PACKED chunk_id;
ffe60014 523 char pathname[PATH_MAX];
d88aee68 524 uint64_t relayd_id;
c30aaa51 525 /* nb_init_streams is the number of streams open initially. */
d88aee68 526 uint32_t nb_init_streams;
de5e9086 527 char name[LTTNG_SYMBOL_NAME_LEN];
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528 /* Use splice or mmap to consume this fd */
529 enum lttng_event_output output;
530 int type; /* Per cpu or metadata. */
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531 uint64_t tracefile_size; /* bytes */
532 uint32_t tracefile_count; /* number of tracefiles */
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533 /* If the channel's streams have to be monitored or not. */
534 uint32_t monitor;
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535 /* timer to check the streams usage in live mode (usec). */
536 unsigned int live_timer_interval;
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537 /* is part of a live session */
538 uint8_t is_live;
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539 /* timer to sample a channel's positions (usec). */
540 unsigned int monitor_timer_interval;
ffe60014 541 } LTTNG_PACKED channel; /* Only used by Kernel. */
3bd1e081 542 struct {
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543 uint64_t stream_key;
544 uint64_t channel_key;
545 int32_t cpu; /* On which CPU this stream is assigned. */
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546 /* Tells the consumer if the stream should be or not monitored. */
547 uint32_t no_monitor;
ffe60014 548 } LTTNG_PACKED stream; /* Only used by Kernel. */
de5e9086 549 struct {
d88aee68 550 uint64_t net_index;
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551 enum lttng_stream_type type;
552 /* Open socket to the relayd */
6151a90f 553 struct lttcomm_relayd_sock sock;
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554 /* Tracing session id associated to the relayd. */
555 uint64_t session_id;
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556 /* Relayd session id, only used with control socket. */
557 uint64_t relayd_session_id;
fc5e05b7 558 } LTTNG_PACKED relayd_sock;
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559 struct {
560 uint64_t net_seq_idx;
fc5e05b7 561 } LTTNG_PACKED destroy_relayd;
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562 struct {
563 uint64_t session_id;
fc5e05b7 564 } LTTNG_PACKED data_pending;
ffe60014 565 struct {
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566 uint64_t subbuf_size; /* bytes */
567 uint64_t num_subbuf; /* power of 2 */
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568 int32_t overwrite; /* 1: overwrite, 0: discard */
569 uint32_t switch_timer_interval; /* usec */
570 uint32_t read_timer_interval; /* usec */
e9404c27 571 unsigned int live_timer_interval; /* usec */
a2814ea7 572 uint8_t is_live; /* is part of a live session */
e9404c27 573 uint32_t monitor_timer_interval; /* usec */
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574 int32_t output; /* splice, mmap */
575 int32_t type; /* metadata or per_cpu */
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576 uint64_t session_id; /* Tracing session id */
577 char pathname[PATH_MAX]; /* Channel file path. */
ffe60014 578 char name[LTTNG_SYMBOL_NAME_LEN]; /* Channel name. */
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579 /* Credentials used to open the UST buffer shared mappings. */
580 struct {
581 uint32_t uid;
582 uint32_t gid;
583 } LTTNG_PACKED buffer_credentials;
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584 uint64_t relayd_id; /* Relayd id if apply. */
585 uint64_t key; /* Unique channel key. */
d2956687 586 /* ID of the session's current trace chunk. */
0a30bf9b 587 LTTNG_OPTIONAL_COMM(uint64_t) LTTNG_PACKED chunk_id;
c70636a7 588 unsigned char uuid[LTTNG_UUID_LEN]; /* uuid for ust tracer. */
7972aab2 589 uint32_t chan_id; /* Channel ID on the tracer side. */
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590 uint64_t tracefile_size; /* bytes */
591 uint32_t tracefile_count; /* number of tracefiles */
1950109e 592 uint64_t session_id_per_pid; /* Per-pid session ID. */
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593 /* Tells the consumer if the stream should be or not monitored. */
594 uint32_t monitor;
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595 /*
596 * For UST per UID buffers, this is the application UID of the
597 * channel. This can be different from the user UID requesting the
598 * channel creation and used for the rights on the stream file
599 * because the application can be in the tracing for instance.
600 */
601 uint32_t ust_app_uid;
491d1539 602 int64_t blocking_timeout;
3d071855 603 char root_shm_path[PATH_MAX];
d7ba1388 604 char shm_path[PATH_MAX];
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605 } LTTNG_PACKED ask_channel;
606 struct {
d88aee68 607 uint64_t key;
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608 } LTTNG_PACKED get_channel;
609 struct {
d88aee68 610 uint64_t key;
ffe60014 611 } LTTNG_PACKED destroy_channel;
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612 struct {
613 uint64_t key; /* Metadata channel key. */
614 uint64_t target_offset; /* Offset in the consumer */
615 uint64_t len; /* Length of metadata to be received. */
93ec662e 616 uint64_t version; /* Version of the metadata. */
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617 } LTTNG_PACKED push_metadata;
618 struct {
619 uint64_t key; /* Metadata channel key. */
620 } LTTNG_PACKED close_metadata;
621 struct {
622 uint64_t key; /* Metadata channel key. */
623 } LTTNG_PACKED setup_metadata;
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624 struct {
625 uint64_t key; /* Channel key. */
626 } LTTNG_PACKED flush_channel;
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627 struct {
628 uint64_t key; /* Channel key. */
629 } LTTNG_PACKED clear_quiescent_channel;
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630 struct {
631 char pathname[PATH_MAX];
632 /* Indicate if the snapshot goes on the relayd or locally. */
633 uint32_t use_relayd;
634 uint32_t metadata; /* This a metadata snapshot. */
635 uint64_t relayd_id; /* Relayd id if apply. */
636 uint64_t key;
d07ceecd 637 uint64_t nb_packets_per_stream;
6dc3064a 638 } LTTNG_PACKED snapshot_channel;
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639 struct {
640 uint64_t channel_key;
641 uint64_t net_seq_idx;
642 } LTTNG_PACKED sent_streams;
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643 struct {
644 uint64_t session_id;
645 uint64_t channel_key;
646 } LTTNG_PACKED discarded_events;
647 struct {
648 uint64_t session_id;
649 uint64_t channel_key;
650 } LTTNG_PACKED lost_packets;
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651 struct {
652 uint64_t session_id;
eded6438 653 } LTTNG_PACKED regenerate_metadata;
b99a8d42 654 struct {
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655 uint32_t metadata; /* This is a metadata channel. */
656 uint64_t relayd_id; /* Relayd id if apply. */
657 uint64_t key;
b99a8d42 658 } LTTNG_PACKED rotate_channel;
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659 struct {
660 uint64_t session_id;
661 uint64_t chunk_id;
662 } LTTNG_PACKED check_rotation_pending_local;
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663 struct {
664 uint64_t relayd_id;
665 uint64_t session_id;
666 uint64_t chunk_id;
92816cc3 667 } LTTNG_PACKED check_rotation_pending_relay;
a1ae2ea5 668 struct {
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669 /*
670 * Relayd id, if applicable (remote).
671 *
672 * A directory file descriptor referring to the chunk's
673 * output folder is transmitted if the chunk is local
674 * (relayd_id unset).
675 *
676 * `override_name` is left NULL (all-zeroes) if the
913a542b 677 * chunk's name is not overridden.
d2956687 678 */
0a30bf9b 679 LTTNG_OPTIONAL_COMM(uint64_t) LTTNG_PACKED relayd_id;
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680 char override_name[LTTNG_NAME_MAX];
681 uint64_t session_id;
682 uint64_t chunk_id;
683 uint64_t creation_timestamp;
e5add6d0 684 LTTNG_OPTIONAL_COMM(struct {
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685 uint32_t uid;
686 uint32_t gid;
e5add6d0 687 } LTTNG_PACKED ) LTTNG_PACKED credentials;
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688 } LTTNG_PACKED create_trace_chunk;
689 struct {
0a30bf9b 690 LTTNG_OPTIONAL_COMM(uint64_t) LTTNG_PACKED relayd_id;
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691 uint64_t session_id;
692 uint64_t chunk_id;
693 uint64_t close_timestamp;
bbc4768c
JG
694 /* enum lttng_trace_chunk_command_type */
695 LTTNG_OPTIONAL_COMM(uint32_t) LTTNG_PACKED close_command;
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696 } LTTNG_PACKED close_trace_chunk;
697 struct {
0a30bf9b 698 LTTNG_OPTIONAL_COMM(uint64_t) LTTNG_PACKED relayd_id;
a1ae2ea5 699 uint64_t session_id;
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700 uint64_t chunk_id;
701 } LTTNG_PACKED trace_chunk_exists;
702 struct {
703 lttng_uuid sessiond_uuid;
704 } LTTNG_PACKED init;
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705 struct {
706 uint64_t key;
707 } LTTNG_PACKED clear_channel;
3bd1e081 708 } u;
fc5e05b7 709} LTTNG_PACKED;
6e3805e2 710
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711/*
712 * Channel monitoring message returned to the session daemon on every
713 * monitor timer expiration.
714 */
715struct lttcomm_consumer_channel_monitor_msg {
716 /* Key of the sampled channel. */
717 uint64_t key;
718 /*
719 * Lowest and highest usage (bytes) at the moment the sample was taken.
720 */
721 uint64_t lowest, highest;
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722 /*
723 * Sum of all the consumed positions for a channel.
724 */
725 uint64_t total_consumed;
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726} LTTNG_PACKED;
727
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728/*
729 * Status message returned to the sessiond after a received command.
730 */
731struct lttcomm_consumer_status_msg {
0c759fc9 732 enum lttcomm_return_code ret_code;
fc5e05b7 733} LTTNG_PACKED;
f50f23d9 734
ffe60014 735struct lttcomm_consumer_status_channel {
0c759fc9 736 enum lttcomm_return_code ret_code;
d88aee68 737 uint64_t key;
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DG
738 unsigned int stream_count;
739} LTTNG_PACKED;
740
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MD
741struct lttcomm_consumer_close_trace_chunk_reply {
742 enum lttcomm_return_code ret_code;
743 uint32_t path_length;
744 char path[];
745};
746
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747#ifdef HAVE_LIBLTTNG_UST_CTL
748
9df8df5e 749#include <lttng/ust-abi.h>
6e3805e2 750
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751/*
752 * Data structure for the commands sent from sessiond to UST.
753 */
754struct lttcomm_ust_msg {
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755 uint32_t handle;
756 uint32_t cmd;
757 union {
3817e7df 758 struct lttng_ust_channel channel;
00a17c97 759 struct lttng_ust_stream stream;
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DG
760 struct lttng_ust_event event;
761 struct lttng_ust_context context;
00a17c97 762 struct lttng_ust_tracer_version version;
3817e7df 763 } u;
fc5e05b7 764} LTTNG_PACKED;
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DG
765
766/*
767 * Data structure for the response from UST to the session daemon.
768 * cmd_type is sent back in the reply for validation.
769 */
770struct lttcomm_ust_reply {
771 uint32_t handle;
772 uint32_t cmd;
773 uint32_t ret_code; /* enum lttcomm_return_code */
774 uint32_t ret_val; /* return value */
775 union {
2b0bf864
DG
776 struct {
777 uint64_t memory_map_size;
fc5e05b7 778 } LTTNG_PACKED channel;
2b0bf864
DG
779 struct {
780 uint64_t memory_map_size;
fc5e05b7 781 } LTTNG_PACKED stream;
00a17c97 782 struct lttng_ust_tracer_version version;
3817e7df 783 } u;
fc5e05b7 784} LTTNG_PACKED;
3817e7df 785
74d0b642 786#endif /* HAVE_LIBLTTNG_UST_CTL */
3bd1e081 787
79445cf0 788LTTNG_HIDDEN const char *lttcomm_get_readable_code(enum lttcomm_return_code code);
fac6795d 789
79445cf0 790LTTNG_HIDDEN int lttcomm_init_inet_sockaddr(struct lttcomm_sockaddr *sockaddr,
6364a07a 791 const char *ip, unsigned int port);
79445cf0 792LTTNG_HIDDEN int lttcomm_init_inet6_sockaddr(struct lttcomm_sockaddr *sockaddr,
6364a07a
DG
793 const char *ip, unsigned int port);
794
79445cf0
JG
795LTTNG_HIDDEN struct lttcomm_sock *lttcomm_alloc_sock(enum lttcomm_sock_proto proto);
796LTTNG_HIDDEN int lttcomm_create_sock(struct lttcomm_sock *sock);
797LTTNG_HIDDEN struct lttcomm_sock *lttcomm_alloc_sock_from_uri(struct lttng_uri *uri);
798LTTNG_HIDDEN void lttcomm_destroy_sock(struct lttcomm_sock *sock);
799LTTNG_HIDDEN struct lttcomm_sock *lttcomm_alloc_copy_sock(struct lttcomm_sock *src);
800LTTNG_HIDDEN void lttcomm_copy_sock(struct lttcomm_sock *dst,
de5e9086 801 struct lttcomm_sock *src);
6364a07a 802
6151a90f 803/* Relayd socket object. */
79445cf0 804LTTNG_HIDDEN struct lttcomm_relayd_sock *lttcomm_alloc_relayd_sock(
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JD
805 struct lttng_uri *uri, uint32_t major, uint32_t minor);
806
79445cf0
JG
807LTTNG_HIDDEN int lttcomm_setsockopt_rcv_timeout(int sock, unsigned int msec);
808LTTNG_HIDDEN int lttcomm_setsockopt_snd_timeout(int sock, unsigned int msec);
783a3b9a 809
2288467f
JG
810LTTNG_HIDDEN int lttcomm_sock_get_port(const struct lttcomm_sock *sock,
811 uint16_t *port);
812/*
813 * Set a port to an lttcomm_sock. This will have no effect is the socket is
814 * already bound.
815 */
816LTTNG_HIDDEN int lttcomm_sock_set_port(struct lttcomm_sock *sock, uint16_t port);
817
79445cf0 818LTTNG_HIDDEN void lttcomm_init(void);
554831e7 819/* Get network timeout, in milliseconds */
79445cf0 820LTTNG_HIDDEN unsigned long lttcomm_get_network_timeout(void);
554831e7 821
773168b7 822#endif /* _LTTNG_SESSIOND_COMM_H */
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