Fix: tcp4 and net4 protocol support in uri_parse
[lttng-tools.git] / src / common / sessiond-comm / sessiond-comm.h
CommitLineData
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1/*
2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
3 * Julien Desfossez <julien.desfossez@polymtl.ca>
773168b7 4 * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
fac6795d 5 *
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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.
fac6795d 9 *
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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
d14d33bf 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
990570ed 13 * more details.
fac6795d 14 *
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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.
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18 */
19
773168b7 20/*
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21 * This header is meant for liblttng and libust internal use ONLY. These
22 * declarations should NOT be considered stable API.
773168b7 23 */
fac6795d 24
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25#ifndef _LTTNG_SESSIOND_COMM_H
26#define _LTTNG_SESSIOND_COMM_H
27
d19d9ada 28#define _GNU_SOURCE
fac6795d 29#include <limits.h>
f3ed775e 30#include <lttng/lttng.h>
da3c9ec1 31#include <lttng/snapshot-internal.h>
b17231c6 32#include <common/compat/socket.h>
a4b92340 33#include <common/uri.h>
ce2a9e76 34#include <common/defaults.h>
ffe60014 35#include <common/compat/uuid.h>
5e16da05 36
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37#include <arpa/inet.h>
38#include <netinet/in.h>
39#include <sys/un.h>
40
41#include "inet.h"
42#include "inet6.h"
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43#include "unix.h"
44
fac6795d 45/* Queue size of listen(2) */
f158a754 46#define LTTNG_SESSIOND_COMM_MAX_LISTEN 64
fac6795d 47
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48/* Maximum number of FDs that can be sent over a Unix socket */
49#define LTTCOMM_MAX_SEND_FDS 4
50
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51/*
52 * Get the error code index from 0 since LTTCOMM_OK start at 1000
fac6795d 53 */
f73fabfd 54#define LTTCOMM_ERR_INDEX(code) (code - LTTCOMM_CONSUMERD_COMMAND_SOCK_READY)
fac6795d 55
6abb15de 56enum lttcomm_sessiond_command {
0d0c377a 57 /* Tracer command */
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58 LTTNG_ADD_CONTEXT = 0,
59 LTTNG_CALIBRATE = 1,
60 LTTNG_DISABLE_CHANNEL = 2,
61 LTTNG_DISABLE_EVENT = 3,
62 LTTNG_DISABLE_ALL_EVENT = 4,
63 LTTNG_ENABLE_CHANNEL = 5,
64 LTTNG_ENABLE_EVENT = 6,
65 LTTNG_ENABLE_ALL_EVENT = 7,
0d0c377a 66 /* Session daemon command */
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67 LTTNG_CREATE_SESSION = 8,
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,
53a80697 78
de5e9086 79 /* Consumer */
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80 LTTNG_DISABLE_CONSUMER = 19,
81 LTTNG_ENABLE_CONSUMER = 20,
82 LTTNG_SET_CONSUMER_URI = 21,
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83 /* 22 */
84 /* 23 */
7c9534d6 85 LTTNG_DATA_PENDING = 24,
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86 LTTNG_SNAPSHOT_ADD_OUTPUT = 25,
87 LTTNG_SNAPSHOT_DEL_OUTPUT = 26,
88 LTTNG_SNAPSHOT_LIST_OUTPUT = 27,
89 LTTNG_SNAPSHOT_RECORD = 28,
27babd3a 90 LTTNG_CREATE_SESSION_SNAPSHOT = 29,
ecc48a90 91 LTTNG_CREATE_SESSION_LIVE = 30,
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92};
93
94enum lttcomm_relayd_command {
95 RELAYD_ADD_STREAM = 1,
96 RELAYD_CREATE_SESSION = 2,
97 RELAYD_START_DATA = 3,
98 RELAYD_UPDATE_SYNC_INFO = 4,
99 RELAYD_VERSION = 5,
100 RELAYD_SEND_METADATA = 6,
101 RELAYD_CLOSE_STREAM = 7,
102 RELAYD_DATA_PENDING = 8,
103 RELAYD_QUIESCENT_CONTROL = 9,
104 RELAYD_BEGIN_DATA_PENDING = 10,
105 RELAYD_END_DATA_PENDING = 11,
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106 RELAYD_ADD_INDEX = 12,
107 RELAYD_SEND_INDEX = 13,
108 RELAYD_CLOSE_INDEX = 14,
a4baae1b 109 /* Live-reading commands (2.4+). */
d3e2ba59 110 RELAYD_LIST_SESSIONS = 15,
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111 /* All streams of the channel have been sent to the relayd (2.4+). */
112 RELAYD_STREAMS_SENT = 16,
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113};
114
115/*
116 * lttcomm error code.
117 */
118enum lttcomm_return_code {
0c759fc9 119 LTTCOMM_CONSUMERD_SUCCESS = 0, /* Everything went fine. */
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120 LTTCOMM_CONSUMERD_COMMAND_SOCK_READY = 1, /* Command socket ready */
121 LTTCOMM_CONSUMERD_SUCCESS_RECV_FD, /* Success on receiving fds */
122 LTTCOMM_CONSUMERD_ERROR_RECV_FD, /* Error on receiving fds */
123 LTTCOMM_CONSUMERD_ERROR_RECV_CMD, /* Error on receiving command */
124 LTTCOMM_CONSUMERD_POLL_ERROR, /* Error in polling thread */
125 LTTCOMM_CONSUMERD_POLL_NVAL, /* Poll on closed fd */
126 LTTCOMM_CONSUMERD_POLL_HUP, /* All fds have hungup */
127 LTTCOMM_CONSUMERD_EXIT_SUCCESS, /* Consumerd exiting normally */
128 LTTCOMM_CONSUMERD_EXIT_FAILURE, /* Consumerd exiting on error */
129 LTTCOMM_CONSUMERD_OUTFD_ERROR, /* Error opening the tracefile */
130 LTTCOMM_CONSUMERD_SPLICE_EBADF, /* EBADF from splice(2) */
131 LTTCOMM_CONSUMERD_SPLICE_EINVAL, /* EINVAL from splice(2) */
132 LTTCOMM_CONSUMERD_SPLICE_ENOMEM, /* ENOMEM from splice(2) */
133 LTTCOMM_CONSUMERD_SPLICE_ESPIPE, /* ESPIPE from splice(2) */
ffe60014 134 LTTCOMM_CONSUMERD_ENOMEM, /* Consumer is out of memory */
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135 LTTCOMM_CONSUMERD_ERROR_METADATA, /* Error with metadata. */
136 LTTCOMM_CONSUMERD_FATAL, /* Fatal error. */
618a6a28 137 LTTCOMM_CONSUMERD_RELAYD_FAIL, /* Error on remote relayd */
0c759fc9 138 LTTCOMM_CONSUMERD_CHANNEL_FAIL, /* Channel creation failed. */
80e327fa 139
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140 /* MUST be last element */
141 LTTCOMM_NR, /* Last element */
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142};
143
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144/* lttng socket protocol. */
145enum lttcomm_sock_proto {
146 LTTCOMM_SOCK_UDP,
147 LTTCOMM_SOCK_TCP,
148};
149
150/*
151 * Index in the net_families array below. Please keep in sync!
152 */
153enum lttcomm_sock_domain {
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154 LTTCOMM_INET = 0,
155 LTTCOMM_INET6 = 1,
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156};
157
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158enum lttcomm_metadata_command {
159 LTTCOMM_METADATA_REQUEST = 1,
160};
161
162/*
163 * Commands sent from the consumerd to the sessiond to request if new metadata
164 * is available. This message is used to find the per UID _or_ per PID registry
165 * for the channel key. For per UID lookup, the triplet
166 * bits_per_long/uid/session_id is used. On lookup failure, we search for the
167 * per PID registry indexed by session id ignoring the other values.
168 */
169struct lttcomm_metadata_request_msg {
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170 uint64_t session_id; /* Tracing session id */
171 uint64_t session_id_per_pid; /* Tracing session id for per-pid */
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172 uint32_t bits_per_long; /* Consumer ABI */
173 uint32_t uid;
174 uint64_t key; /* Metadata channel key. */
175} LTTNG_PACKED;
176
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177struct lttcomm_sockaddr {
178 enum lttcomm_sock_domain type;
179 union {
180 struct sockaddr_in sin;
181 struct sockaddr_in6 sin6;
182 } addr;
fc5e05b7 183} LTTNG_PACKED;
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184
185struct lttcomm_sock {
d88aee68 186 int32_t fd;
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187 enum lttcomm_sock_proto proto;
188 struct lttcomm_sockaddr sockaddr;
189 const struct lttcomm_proto_ops *ops;
fc5e05b7 190} LTTNG_PACKED;
de5e9086 191
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192/*
193 * Relayd sock. Adds the protocol version to use for the communications with
194 * the relayd.
195 */
196struct lttcomm_relayd_sock {
197 struct lttcomm_sock sock;
198 uint32_t major;
199 uint32_t minor;
200} LTTNG_PACKED;
201
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202struct lttcomm_net_family {
203 int family;
204 int (*create) (struct lttcomm_sock *sock, int type, int proto);
205};
206
207struct lttcomm_proto_ops {
208 int (*bind) (struct lttcomm_sock *sock);
209 int (*close) (struct lttcomm_sock *sock);
210 int (*connect) (struct lttcomm_sock *sock);
211 struct lttcomm_sock *(*accept) (struct lttcomm_sock *sock);
212 int (*listen) (struct lttcomm_sock *sock, int backlog);
213 ssize_t (*recvmsg) (struct lttcomm_sock *sock, void *buf, size_t len,
214 int flags);
215 ssize_t (*sendmsg) (struct lttcomm_sock *sock, void *buf, size_t len,
216 int flags);
217};
218
fac6795d 219/*
9bda164d 220 * Data structure received from lttng client to session daemon.
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221 */
222struct lttcomm_session_msg {
d0b96690 223 uint32_t cmd_type; /* enum lttcomm_sessiond_command */
42abccdb 224 struct lttng_session session;
9f19cc17 225 struct lttng_domain domain;
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226 union {
227 struct {
db8870ed 228 char channel_name[LTTNG_SYMBOL_NAME_LEN];
f3ed775e 229 char name[NAME_MAX];
fc5e05b7 230 } LTTNG_PACKED disable;
f3ed775e 231 /* Event data */
fac6795d 232 struct {
db8870ed 233 char channel_name[LTTNG_SYMBOL_NAME_LEN];
f3ed775e 234 struct lttng_event event;
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235 /* Length of following bytecode for filter. */
236 uint32_t bytecode_len;
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237 /* exclusion data */
238 uint32_t exclusion_count;
239 /*
240 * After this structure, the following variable-length
241 * items are transmitted:
242 * - char exclusion_names[LTTNG_SYMBOL_NAME_LEN][exclusion_count]
243 * - unsigned char filter_bytecode[bytecode_len]
244 */
fc5e05b7 245 } LTTNG_PACKED enable;
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246 /* Create channel */
247 struct {
248 struct lttng_channel chan;
fc5e05b7 249 } LTTNG_PACKED channel;
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250 /* Context */
251 struct {
db8870ed 252 char channel_name[LTTNG_SYMBOL_NAME_LEN];
7d29a247 253 struct lttng_event_context ctx;
fc5e05b7 254 } LTTNG_PACKED context;
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255 /* Use by register_consumer */
256 struct {
257 char path[PATH_MAX];
fc5e05b7 258 } LTTNG_PACKED reg;
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259 /* List */
260 struct {
db8870ed 261 char channel_name[LTTNG_SYMBOL_NAME_LEN];
fc5e05b7 262 } LTTNG_PACKED list;
d0254c7c 263 struct lttng_calibrate calibrate;
a4b92340 264 /* Used by the set_consumer_url and used by create_session also call */
de5e9086 265 struct {
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266 /* Number of lttng_uri following */
267 uint32_t size;
fc5e05b7 268 } LTTNG_PACKED uri;
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269 struct {
270 struct lttng_snapshot_output output;
271 } LTTNG_PACKED snapshot_output;
272 struct {
273 uint32_t wait;
274 struct lttng_snapshot_output output;
275 } LTTNG_PACKED snapshot_record;
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276 struct {
277 uint32_t nb_uri;
278 unsigned int timer_interval; /* usec */
279 } LTTNG_PACKED session_live;
fac6795d 280 } u;
fc5e05b7 281} LTTNG_PACKED;
fac6795d 282
d93c4f1f 283#define LTTNG_FILTER_MAX_LEN 65536
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284
285/*
286 * Filter bytecode data. The reloc table is located at the end of the
287 * bytecode. It is made of tuples: (uint16_t, var. len. string). It
288 * starts at reloc_table_offset.
289 */
b6bbed5f 290#define LTTNG_FILTER_PADDING 32
53a80697 291struct lttng_filter_bytecode {
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292 uint32_t len; /* len of data */
293 uint32_t reloc_table_offset;
f3f0db50 294 uint64_t seqnum;
b6bbed5f 295 char padding[LTTNG_FILTER_PADDING];
53a80697 296 char data[0];
fc5e05b7 297} LTTNG_PACKED;
53a80697 298
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299/*
300 * Event exclusion data. At the end of the structure, there will actually
301 * by zero or more names, where the actual number of names is given by
302 * the 'count' item of the structure.
303 */
304#define LTTNG_EVENT_EXCLUSION_PADDING 32
305struct lttng_event_exclusion {
306 uint32_t count;
307 char padding[LTTNG_EVENT_EXCLUSION_PADDING];
308 char names[LTTNG_SYMBOL_NAME_LEN][0];
309} LTTNG_PACKED;
310
fac6795d 311/*
5e16da05 312 * Data structure for the response from sessiond to the lttng client.
fac6795d 313 */
5461b305 314struct lttcomm_lttng_msg {
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315 uint32_t cmd_type; /* enum lttcomm_sessiond_command */
316 uint32_t ret_code; /* enum lttcomm_return_code */
317 uint32_t pid; /* pid_t */
773168b7 318 uint32_t data_size;
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319 /* Contains: trace_name + data */
320 char payload[];
fc5e05b7 321} LTTNG_PACKED;
fac6795d 322
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323struct lttcomm_lttng_output_id {
324 uint32_t id;
325} LTTNG_PACKED;
326
6e3805e2 327/*
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328 * lttcomm_consumer_msg is the message sent from sessiond to consumerd
329 * to either add a channel, add a stream, update a stream, or stop
330 * operation.
6e3805e2 331 */
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332struct lttcomm_consumer_msg {
333 uint32_t cmd_type; /* enum consumerd_command */
334 union {
335 struct {
d88aee68 336 uint64_t channel_key;
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337 uint64_t session_id;
338 char pathname[PATH_MAX];
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339 uint32_t uid;
340 uint32_t gid;
341 uint64_t relayd_id;
c30aaa51 342 /* nb_init_streams is the number of streams open initially. */
d88aee68 343 uint32_t nb_init_streams;
de5e9086 344 char name[LTTNG_SYMBOL_NAME_LEN];
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345 /* Use splice or mmap to consume this fd */
346 enum lttng_event_output output;
347 int type; /* Per cpu or metadata. */
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348 uint64_t tracefile_size; /* bytes */
349 uint32_t tracefile_count; /* number of tracefiles */
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350 /* If the channel's streams have to be monitored or not. */
351 uint32_t monitor;
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352 /* timer to check the streams usage in live mode (usec). */
353 unsigned int live_timer_interval;
ffe60014 354 } LTTNG_PACKED channel; /* Only used by Kernel. */
3bd1e081 355 struct {
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356 uint64_t stream_key;
357 uint64_t channel_key;
358 int32_t cpu; /* On which CPU this stream is assigned. */
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359 /* Tells the consumer if the stream should be or not monitored. */
360 uint32_t no_monitor;
ffe60014 361 } LTTNG_PACKED stream; /* Only used by Kernel. */
de5e9086 362 struct {
d88aee68 363 uint64_t net_index;
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364 enum lttng_stream_type type;
365 /* Open socket to the relayd */
6151a90f 366 struct lttcomm_relayd_sock sock;
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367 /* Tracing session id associated to the relayd. */
368 uint64_t session_id;
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369 /* Relayd session id, only used with control socket. */
370 uint64_t relayd_session_id;
fc5e05b7 371 } LTTNG_PACKED relayd_sock;
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372 struct {
373 uint64_t net_seq_idx;
fc5e05b7 374 } LTTNG_PACKED destroy_relayd;
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375 struct {
376 uint64_t session_id;
fc5e05b7 377 } LTTNG_PACKED data_pending;
ffe60014 378 struct {
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379 uint64_t subbuf_size; /* bytes */
380 uint64_t num_subbuf; /* power of 2 */
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381 int32_t overwrite; /* 1: overwrite, 0: discard */
382 uint32_t switch_timer_interval; /* usec */
383 uint32_t read_timer_interval; /* usec */
ecc48a90 384 unsigned int live_timer_interval; /* usec */
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385 int32_t output; /* splice, mmap */
386 int32_t type; /* metadata or per_cpu */
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387 uint64_t session_id; /* Tracing session id */
388 char pathname[PATH_MAX]; /* Channel file path. */
ffe60014 389 char name[LTTNG_SYMBOL_NAME_LEN]; /* Channel name. */
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390 uint32_t uid; /* User ID of the session */
391 uint32_t gid; /* Group ID ot the session */
392 uint64_t relayd_id; /* Relayd id if apply. */
393 uint64_t key; /* Unique channel key. */
b6d38284 394 unsigned char uuid[UUID_LEN]; /* uuid for ust tracer. */
7972aab2 395 uint32_t chan_id; /* Channel ID on the tracer side. */
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396 uint64_t tracefile_size; /* bytes */
397 uint32_t tracefile_count; /* number of tracefiles */
1950109e 398 uint64_t session_id_per_pid; /* Per-pid session ID. */
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399 /* Tells the consumer if the stream should be or not monitored. */
400 uint32_t monitor;
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401 /*
402 * For UST per UID buffers, this is the application UID of the
403 * channel. This can be different from the user UID requesting the
404 * channel creation and used for the rights on the stream file
405 * because the application can be in the tracing for instance.
406 */
407 uint32_t ust_app_uid;
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408 } LTTNG_PACKED ask_channel;
409 struct {
d88aee68 410 uint64_t key;
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411 } LTTNG_PACKED get_channel;
412 struct {
d88aee68 413 uint64_t key;
ffe60014 414 } LTTNG_PACKED destroy_channel;
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415 struct {
416 uint64_t key; /* Metadata channel key. */
417 uint64_t target_offset; /* Offset in the consumer */
418 uint64_t len; /* Length of metadata to be received. */
419 } LTTNG_PACKED push_metadata;
420 struct {
421 uint64_t key; /* Metadata channel key. */
422 } LTTNG_PACKED close_metadata;
423 struct {
424 uint64_t key; /* Metadata channel key. */
425 } LTTNG_PACKED setup_metadata;
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426 struct {
427 uint64_t key; /* Channel key. */
428 } LTTNG_PACKED flush_channel;
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429 struct {
430 char pathname[PATH_MAX];
431 /* Indicate if the snapshot goes on the relayd or locally. */
432 uint32_t use_relayd;
433 uint32_t metadata; /* This a metadata snapshot. */
434 uint64_t relayd_id; /* Relayd id if apply. */
435 uint64_t key;
5c786ded 436 uint64_t max_stream_size;
6dc3064a 437 } LTTNG_PACKED snapshot_channel;
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438 struct {
439 uint64_t channel_key;
440 uint64_t net_seq_idx;
441 } LTTNG_PACKED sent_streams;
3bd1e081 442 } u;
fc5e05b7 443} LTTNG_PACKED;
6e3805e2 444
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445/*
446 * Status message returned to the sessiond after a received command.
447 */
448struct lttcomm_consumer_status_msg {
0c759fc9 449 enum lttcomm_return_code ret_code;
fc5e05b7 450} LTTNG_PACKED;
f50f23d9 451
ffe60014 452struct lttcomm_consumer_status_channel {
0c759fc9 453 enum lttcomm_return_code ret_code;
d88aee68 454 uint64_t key;
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455 unsigned int stream_count;
456} LTTNG_PACKED;
457
74d0b642 458#ifdef HAVE_LIBLTTNG_UST_CTL
3bd1e081 459
9df8df5e 460#include <lttng/ust-abi.h>
6e3805e2 461
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462/*
463 * Data structure for the commands sent from sessiond to UST.
464 */
465struct lttcomm_ust_msg {
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466 uint32_t handle;
467 uint32_t cmd;
468 union {
3817e7df 469 struct lttng_ust_channel channel;
00a17c97 470 struct lttng_ust_stream stream;
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471 struct lttng_ust_event event;
472 struct lttng_ust_context context;
00a17c97 473 struct lttng_ust_tracer_version version;
3817e7df 474 } u;
fc5e05b7 475} LTTNG_PACKED;
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476
477/*
478 * Data structure for the response from UST to the session daemon.
479 * cmd_type is sent back in the reply for validation.
480 */
481struct lttcomm_ust_reply {
482 uint32_t handle;
483 uint32_t cmd;
484 uint32_t ret_code; /* enum lttcomm_return_code */
485 uint32_t ret_val; /* return value */
486 union {
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487 struct {
488 uint64_t memory_map_size;
fc5e05b7 489 } LTTNG_PACKED channel;
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490 struct {
491 uint64_t memory_map_size;
fc5e05b7 492 } LTTNG_PACKED stream;
00a17c97 493 struct lttng_ust_tracer_version version;
3817e7df 494 } u;
fc5e05b7 495} LTTNG_PACKED;
3817e7df 496
74d0b642 497#endif /* HAVE_LIBLTTNG_UST_CTL */
3bd1e081 498
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499extern const char *lttcomm_get_readable_code(enum lttcomm_return_code code);
500
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501extern int lttcomm_init_inet_sockaddr(struct lttcomm_sockaddr *sockaddr,
502 const char *ip, unsigned int port);
503extern int lttcomm_init_inet6_sockaddr(struct lttcomm_sockaddr *sockaddr,
504 const char *ip, unsigned int port);
505
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506extern struct lttcomm_sock *lttcomm_alloc_sock(enum lttcomm_sock_proto proto);
507extern int lttcomm_create_sock(struct lttcomm_sock *sock);
508extern struct lttcomm_sock *lttcomm_alloc_sock_from_uri(struct lttng_uri *uri);
509extern void lttcomm_destroy_sock(struct lttcomm_sock *sock);
510extern struct lttcomm_sock *lttcomm_alloc_copy_sock(struct lttcomm_sock *src);
511extern void lttcomm_copy_sock(struct lttcomm_sock *dst,
512 struct lttcomm_sock *src);
6364a07a 513
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514/* Relayd socket object. */
515extern struct lttcomm_relayd_sock *lttcomm_alloc_relayd_sock(
516 struct lttng_uri *uri, uint32_t major, uint32_t minor);
517
783a3b9a
MD
518extern int lttcomm_setsockopt_rcv_timeout(int sock, unsigned int msec);
519extern int lttcomm_setsockopt_snd_timeout(int sock, unsigned int msec);
520
554831e7
MD
521extern void lttcomm_init(void);
522/* Get network timeout, in milliseconds */
523extern unsigned long lttcomm_get_network_timeout(void);
524
773168b7 525#endif /* _LTTNG_SESSIOND_COMM_H */
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