Commit | Line | Data |
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3bd1e081 MD |
1 | /* |
2 | * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca> | |
00e2e675 DG |
3 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
4 | * 2012 - David Goulet <dgoulet@efficios.com> | |
3bd1e081 | 5 | * |
d14d33bf AM |
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. | |
3bd1e081 | 9 | * |
d14d33bf AM |
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. | |
3bd1e081 | 14 | * |
d14d33bf AM |
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. | |
3bd1e081 MD |
18 | */ |
19 | ||
f02e1e8a DG |
20 | #ifndef LIB_CONSUMER_H |
21 | #define LIB_CONSUMER_H | |
3bd1e081 MD |
22 | |
23 | #include <limits.h> | |
24 | #include <poll.h> | |
6df2e2c9 | 25 | #include <unistd.h> |
ffe60014 | 26 | #include <urcu/list.h> |
e4421fec | 27 | |
3bd1e081 | 28 | #include <lttng/lttng.h> |
10a8a223 | 29 | |
b9182dd9 DG |
30 | #include <common/hashtable/hashtable.h> |
31 | #include <common/compat/fcntl.h> | |
ffe60014 | 32 | #include <common/compat/uuid.h> |
00e2e675 | 33 | #include <common/sessiond-comm/sessiond-comm.h> |
3bd1e081 | 34 | |
3bd1e081 MD |
35 | /* Commands for consumer */ |
36 | enum lttng_consumer_command { | |
37 | LTTNG_CONSUMER_ADD_CHANNEL, | |
38 | LTTNG_CONSUMER_ADD_STREAM, | |
39 | /* pause, delete, active depending on fd state */ | |
40 | LTTNG_CONSUMER_UPDATE_STREAM, | |
41 | /* inform the consumer to quit when all fd has hang up */ | |
42 | LTTNG_CONSUMER_STOP, | |
00e2e675 | 43 | LTTNG_CONSUMER_ADD_RELAYD_SOCKET, |
173af62f DG |
44 | /* Inform the consumer to kill a specific relayd connection */ |
45 | LTTNG_CONSUMER_DESTROY_RELAYD, | |
53632229 | 46 | /* Return to the sessiond if there is data pending for a session */ |
6d805429 | 47 | LTTNG_CONSUMER_DATA_PENDING, |
ffe60014 DG |
48 | /* Consumer creates a channel and returns it to sessiond. */ |
49 | LTTNG_CONSUMER_ASK_CHANNEL_CREATION, | |
50 | LTTNG_CONSUMER_GET_CHANNEL, | |
51 | LTTNG_CONSUMER_DESTROY_CHANNEL, | |
d88aee68 DG |
52 | LTTNG_CONSUMER_PUSH_METADATA, |
53 | LTTNG_CONSUMER_CLOSE_METADATA, | |
54 | LTTNG_CONSUMER_SETUP_METADATA, | |
7972aab2 | 55 | LTTNG_CONSUMER_FLUSH_CHANNEL, |
3bd1e081 MD |
56 | }; |
57 | ||
58 | /* State of each fd in consumer */ | |
59 | enum lttng_consumer_stream_state { | |
60 | LTTNG_CONSUMER_ACTIVE_STREAM, | |
61 | LTTNG_CONSUMER_PAUSE_STREAM, | |
62 | LTTNG_CONSUMER_DELETE_STREAM, | |
63 | }; | |
64 | ||
3bd1e081 MD |
65 | enum lttng_consumer_type { |
66 | LTTNG_CONSUMER_UNKNOWN = 0, | |
67 | LTTNG_CONSUMER_KERNEL, | |
7753dea8 MD |
68 | LTTNG_CONSUMER64_UST, |
69 | LTTNG_CONSUMER32_UST, | |
3bd1e081 MD |
70 | }; |
71 | ||
8994307f DG |
72 | enum consumer_endpoint_status { |
73 | CONSUMER_ENDPOINT_ACTIVE, | |
74 | CONSUMER_ENDPOINT_INACTIVE, | |
75 | }; | |
76 | ||
ffe60014 DG |
77 | enum consumer_channel_output { |
78 | CONSUMER_CHANNEL_MMAP = 0, | |
79 | CONSUMER_CHANNEL_SPLICE = 1, | |
80 | }; | |
81 | ||
82 | enum consumer_channel_type { | |
83 | CONSUMER_CHANNEL_TYPE_METADATA = 0, | |
d88aee68 | 84 | CONSUMER_CHANNEL_TYPE_DATA = 1, |
ffe60014 DG |
85 | }; |
86 | ||
87 | struct stream_list { | |
88 | struct cds_list_head head; | |
89 | unsigned int count; | |
90 | }; | |
91 | ||
331744e3 JD |
92 | /* Stub. */ |
93 | struct consumer_metadata_cache; | |
94 | ||
3bd1e081 | 95 | struct lttng_consumer_channel { |
ffe60014 | 96 | /* HT node used for consumer_data.channel_ht */ |
d88aee68 | 97 | struct lttng_ht_node_u64 node; |
ffe60014 | 98 | /* Indexed key. Incremented value in the consumer. */ |
d88aee68 | 99 | uint64_t key; |
ffe60014 DG |
100 | /* Number of streams referencing this channel */ |
101 | int refcount; | |
102 | /* Tracing session id on the session daemon side. */ | |
103 | uint64_t session_id; | |
104 | /* Channel trace file path name. */ | |
105 | char pathname[PATH_MAX]; | |
106 | /* Channel name. */ | |
107 | char name[LTTNG_SYMBOL_NAME_LEN]; | |
108 | /* UID and GID of the channel. */ | |
109 | uid_t uid; | |
110 | gid_t gid; | |
111 | /* Relayd id of the channel. -1 if it does not apply. */ | |
d88aee68 | 112 | int64_t relayd_id; |
c30aaa51 | 113 | /* |
ffe60014 DG |
114 | * Number of streams NOT initialized yet. This is used in order to not |
115 | * delete this channel if streams are getting initialized. | |
c30aaa51 | 116 | */ |
ffe60014 DG |
117 | unsigned int nb_init_stream_left; |
118 | /* Output type (mmap or splice). */ | |
119 | enum consumer_channel_output output; | |
120 | /* Channel type for stream */ | |
121 | enum consumer_channel_type type; | |
c30aaa51 | 122 | |
3bd1e081 | 123 | /* For UST */ |
ffe60014 DG |
124 | struct ustctl_consumer_channel *uchan; |
125 | unsigned char uuid[UUID_STR_LEN]; | |
126 | /* | |
127 | * Temporary stream list used to store the streams once created and waiting | |
128 | * to be sent to the session daemon by receiving the | |
129 | * LTTNG_CONSUMER_GET_CHANNEL. | |
130 | */ | |
131 | struct stream_list streams; | |
d88aee68 DG |
132 | /* |
133 | * Set if the channel is metadata. We keep a reference to the stream | |
134 | * because we have to flush data once pushed by the session daemon. For a | |
135 | * regular channel, this is always set to NULL. | |
136 | */ | |
137 | struct lttng_consumer_stream *metadata_stream; | |
d8ef542d MD |
138 | |
139 | /* for UST */ | |
140 | int wait_fd; | |
141 | /* Node within channel thread ht */ | |
142 | struct lttng_ht_node_u64 wait_fd_node; | |
331744e3 JD |
143 | |
144 | /* Metadata cache is metadata channel */ | |
145 | struct consumer_metadata_cache *metadata_cache; | |
146 | /* For metadata periodical flush */ | |
147 | int switch_timer_enabled; | |
148 | timer_t switch_timer; | |
3bd1e081 MD |
149 | }; |
150 | ||
3bd1e081 MD |
151 | /* |
152 | * Internal representation of the streams, sessiond_key is used to identify | |
153 | * uniquely a stream. | |
154 | */ | |
155 | struct lttng_consumer_stream { | |
53632229 | 156 | /* HT node used by the data_ht and metadata_ht */ |
d88aee68 | 157 | struct lttng_ht_node_u64 node; |
d8ef542d MD |
158 | /* stream indexed per channel key node */ |
159 | struct lttng_ht_node_u64 node_channel_id; | |
53632229 | 160 | /* HT node used in consumer_data.stream_list_ht */ |
d88aee68 | 161 | struct lttng_ht_node_u64 node_session_id; |
ffe60014 DG |
162 | /* Pointer to associated channel. */ |
163 | struct lttng_consumer_channel *chan; | |
164 | ||
165 | /* Key by which the stream is indexed for 'node'. */ | |
d88aee68 | 166 | uint64_t key; |
3bd1e081 | 167 | /* |
ffe60014 DG |
168 | * File descriptor of the data output file. This can be either a file or a |
169 | * socket fd for relayd streaming. | |
3bd1e081 | 170 | */ |
3bd1e081 | 171 | int out_fd; /* output file to write the data */ |
ffe60014 DG |
172 | /* Write position in the output file descriptor */ |
173 | off_t out_fd_offset; | |
3bd1e081 | 174 | enum lttng_consumer_stream_state state; |
b5c5fc29 | 175 | int shm_fd_is_copy; |
4078b776 | 176 | int data_read; |
d056b477 | 177 | int hangup_flush_done; |
ffe60014 DG |
178 | enum lttng_event_output output; |
179 | /* Maximum subbuffer size. */ | |
180 | unsigned long max_sb_size; | |
181 | ||
182 | /* | |
183 | * Still used by the kernel for MMAP output. For UST, the ustctl getter is | |
184 | * used for the mmap base and offset. | |
185 | */ | |
186 | void *mmap_base; | |
187 | unsigned long mmap_len; | |
188 | ||
189 | /* For UST */ | |
190 | ||
191 | int wait_fd; | |
6df2e2c9 MD |
192 | /* UID/GID of the user owning the session to which stream belongs */ |
193 | uid_t uid; | |
194 | gid_t gid; | |
00e2e675 | 195 | /* Network sequence number. Indicating on which relayd socket it goes. */ |
d88aee68 | 196 | uint64_t net_seq_idx; |
00e2e675 DG |
197 | /* Identify if the stream is the metadata */ |
198 | unsigned int metadata_flag; | |
199 | /* Used when the stream is set for network streaming */ | |
200 | uint64_t relayd_stream_id; | |
3604f373 DG |
201 | /* |
202 | * When sending a stream packet to a relayd, this number is used to track | |
203 | * the packet sent by the consumer and seen by the relayd. When sending the | |
204 | * data header to the relayd, this number is sent and if the transmission | |
205 | * was successful, it is incremented. | |
206 | * | |
207 | * Even if the full data is not fully transmitted it won't matter since | |
208 | * only two possible error can happen after that where either the relayd | |
209 | * died or a read error is detected on the stream making this value useless | |
210 | * after that. | |
211 | * | |
212 | * This value SHOULD be read/updated atomically or with the lock acquired. | |
213 | */ | |
173af62f | 214 | uint64_t next_net_seq_num; |
63281d5d | 215 | /* |
74251bb8 DG |
216 | * Lock to use the stream FDs since they are used between threads. |
217 | * | |
218 | * This is nested INSIDE the consumer_data lock. | |
219 | * This is nested OUTSIDE consumer_relayd_sock_pair lock. | |
63281d5d | 220 | */ |
53632229 DG |
221 | pthread_mutex_t lock; |
222 | /* Tracing session id */ | |
223 | uint64_t session_id; | |
8994307f DG |
224 | /* |
225 | * Indicates if the stream end point is still active or not (network | |
226 | * streaming or local file system). The thread "owning" the stream is | |
227 | * handling this status and can be notified of a state change through the | |
228 | * consumer data appropriate pipe. | |
229 | */ | |
230 | enum consumer_endpoint_status endpoint_status; | |
ffe60014 DG |
231 | /* Stream name. Format is: <channel_name>_<cpu_number> */ |
232 | char name[LTTNG_SYMBOL_NAME_LEN]; | |
233 | /* Internal state of libustctl. */ | |
234 | struct ustctl_consumer_stream *ustream; | |
235 | struct cds_list_head send_node; | |
00e2e675 DG |
236 | }; |
237 | ||
238 | /* | |
239 | * Internal representation of a relayd socket pair. | |
240 | */ | |
241 | struct consumer_relayd_sock_pair { | |
242 | /* Network sequence number. */ | |
d88aee68 | 243 | int64_t net_seq_idx; |
00e2e675 DG |
244 | /* Number of stream associated with this relayd */ |
245 | unsigned int refcount; | |
173af62f DG |
246 | |
247 | /* | |
248 | * This flag indicates whether or not we should destroy this object. The | |
249 | * destruction should ONLY occurs when this flag is set and the refcount is | |
250 | * set to zero. | |
251 | */ | |
252 | unsigned int destroy_flag; | |
253 | ||
51d7db73 DG |
254 | /* |
255 | * Mutex protecting the control socket to avoid out of order packets | |
256 | * between threads sending data to the relayd. Since metadata data is sent | |
257 | * over that socket, at least two sendmsg() are needed (header + data) | |
258 | * creating a race for packets to overlap between threads using it. | |
74251bb8 DG |
259 | * |
260 | * This is nested INSIDE the consumer_data lock. | |
261 | * This is nested INSIDE the stream lock. | |
51d7db73 | 262 | */ |
00e2e675 | 263 | pthread_mutex_t ctrl_sock_mutex; |
51d7db73 DG |
264 | |
265 | /* Control socket. Command and metadata are passed over it */ | |
00e2e675 | 266 | struct lttcomm_sock control_sock; |
51d7db73 DG |
267 | |
268 | /* | |
269 | * We don't need a mutex at this point since we only splice or write single | |
270 | * large chunk of data with a header appended at the begining. Moreover, | |
271 | * this socket is for now only used in a single thread. | |
272 | */ | |
00e2e675 | 273 | struct lttcomm_sock data_sock; |
d88aee68 | 274 | struct lttng_ht_node_u64 node; |
c5b6f4f0 | 275 | |
f7079f67 DG |
276 | /* Session id on both sides for the sockets. */ |
277 | uint64_t relayd_session_id; | |
278 | uint64_t sessiond_session_id; | |
3bd1e081 MD |
279 | }; |
280 | ||
281 | /* | |
282 | * UST consumer local data to the program. One or more instance per | |
283 | * process. | |
284 | */ | |
285 | struct lttng_consumer_local_data { | |
4078b776 MD |
286 | /* |
287 | * Function to call when data is available on a buffer. | |
288 | * Returns the number of bytes read, or negative error value. | |
289 | */ | |
290 | ssize_t (*on_buffer_ready)(struct lttng_consumer_stream *stream, | |
d41f73b7 | 291 | struct lttng_consumer_local_data *ctx); |
3bd1e081 MD |
292 | /* |
293 | * function to call when we receive a new channel, it receives a | |
294 | * newly allocated channel, depending on the return code of this | |
295 | * function, the new channel will be handled by the application | |
296 | * or the library. | |
297 | * | |
298 | * Returns: | |
299 | * > 0 (success, FD is kept by application) | |
300 | * == 0 (success, FD is left to library) | |
301 | * < 0 (error) | |
302 | */ | |
303 | int (*on_recv_channel)(struct lttng_consumer_channel *channel); | |
304 | /* | |
305 | * function to call when we receive a new stream, it receives a | |
306 | * newly allocated stream, depending on the return code of this | |
307 | * function, the new stream will be handled by the application | |
308 | * or the library. | |
309 | * | |
310 | * Returns: | |
311 | * > 0 (success, FD is kept by application) | |
312 | * == 0 (success, FD is left to library) | |
313 | * < 0 (error) | |
314 | */ | |
315 | int (*on_recv_stream)(struct lttng_consumer_stream *stream); | |
316 | /* | |
317 | * function to call when a stream is getting updated by the session | |
318 | * daemon, this function receives the sessiond key and the new | |
319 | * state, depending on the return code of this function the | |
320 | * update of state for the stream is handled by the application | |
321 | * or the library. | |
322 | * | |
323 | * Returns: | |
324 | * > 0 (success, FD is kept by application) | |
325 | * == 0 (success, FD is left to library) | |
326 | * < 0 (error) | |
327 | */ | |
328 | int (*on_update_stream)(int sessiond_key, uint32_t state); | |
331744e3 | 329 | enum lttng_consumer_type type; |
3bd1e081 MD |
330 | /* socket to communicate errors with sessiond */ |
331 | int consumer_error_socket; | |
331744e3 JD |
332 | /* socket to ask metadata to sessiond */ |
333 | int consumer_metadata_socket; | |
3bd1e081 MD |
334 | /* socket to exchange commands with sessiond */ |
335 | char *consumer_command_sock_path; | |
336 | /* communication with splice */ | |
337 | int consumer_thread_pipe[2]; | |
d8ef542d | 338 | int consumer_channel_pipe[2]; |
fb3a43a9 | 339 | int consumer_splice_metadata_pipe[2]; |
50f8ae69 DG |
340 | /* Data stream poll thread pipe. To transfer data stream to the thread */ |
341 | int consumer_data_pipe[2]; | |
3bd1e081 MD |
342 | /* to let the signal handler wake up the fd receiver thread */ |
343 | int consumer_should_quit[2]; | |
fb3a43a9 DG |
344 | /* Metadata poll thread pipe. Transfer metadata stream to it */ |
345 | int consumer_metadata_pipe[2]; | |
3bd1e081 MD |
346 | }; |
347 | ||
348 | /* | |
349 | * Library-level data. One instance per process. | |
350 | */ | |
351 | struct lttng_consumer_global_data { | |
352 | /* | |
e4421fec DG |
353 | * At this time, this lock is used to ensure coherence between the count |
354 | * and number of element in the hash table. It's also a protection for | |
6065ceec DG |
355 | * concurrent read/write between threads. |
356 | * | |
74251bb8 DG |
357 | * This is nested OUTSIDE the stream lock. |
358 | * This is nested OUTSIDE the consumer_relayd_sock_pair lock. | |
3bd1e081 MD |
359 | */ |
360 | pthread_mutex_t lock; | |
e4421fec | 361 | |
3bd1e081 | 362 | /* |
3cc2f24a DG |
363 | * Number of streams in the data stream hash table declared outside. |
364 | * Protected by consumer_data.lock. | |
3bd1e081 MD |
365 | */ |
366 | int stream_count; | |
3cc2f24a DG |
367 | |
368 | /* Channel hash table protected by consumer_data.lock. */ | |
e4421fec | 369 | struct lttng_ht *channel_ht; |
3bd1e081 MD |
370 | /* |
371 | * Flag specifying if the local array of FDs needs update in the | |
372 | * poll function. Protected by consumer_data.lock. | |
373 | */ | |
374 | unsigned int need_update; | |
375 | enum lttng_consumer_type type; | |
00e2e675 DG |
376 | |
377 | /* | |
378 | * Relayd socket(s) hashtable indexed by network sequence number. Each | |
379 | * stream has an index which associate the right relayd socket to use. | |
380 | */ | |
381 | struct lttng_ht *relayd_ht; | |
53632229 DG |
382 | |
383 | /* | |
384 | * This hash table contains all streams (metadata and data) indexed by | |
385 | * session id. In other words, the ht is indexed by session id and each | |
386 | * bucket contains the list of associated streams. | |
387 | * | |
388 | * This HT uses the "node_session_id" of the consumer stream. | |
389 | */ | |
390 | struct lttng_ht *stream_list_ht; | |
d8ef542d MD |
391 | |
392 | /* | |
393 | * This HT uses the "node_channel_id" of the consumer stream. | |
394 | */ | |
395 | struct lttng_ht *stream_per_chan_id_ht; | |
3bd1e081 MD |
396 | }; |
397 | ||
e4421fec DG |
398 | /* |
399 | * Init consumer data structures. | |
400 | */ | |
ffe60014 | 401 | void lttng_consumer_init(void); |
e4421fec | 402 | |
3bd1e081 MD |
403 | /* |
404 | * Set the error socket for communication with a session daemon. | |
405 | */ | |
ffe60014 DG |
406 | void lttng_consumer_set_error_sock(struct lttng_consumer_local_data *ctx, |
407 | int sock); | |
3bd1e081 MD |
408 | |
409 | /* | |
410 | * Set the command socket path for communication with a session daemon. | |
411 | */ | |
ffe60014 | 412 | void lttng_consumer_set_command_sock_path( |
3bd1e081 MD |
413 | struct lttng_consumer_local_data *ctx, char *sock); |
414 | ||
415 | /* | |
416 | * Send return code to session daemon. | |
417 | * | |
418 | * Returns the return code of sendmsg : the number of bytes transmitted or -1 | |
419 | * on error. | |
420 | */ | |
ffe60014 | 421 | int lttng_consumer_send_error(struct lttng_consumer_local_data *ctx, int cmd); |
3bd1e081 MD |
422 | |
423 | /* | |
424 | * Called from signal handler to ensure a clean exit. | |
425 | */ | |
ffe60014 | 426 | void lttng_consumer_should_exit(struct lttng_consumer_local_data *ctx); |
3bd1e081 MD |
427 | |
428 | /* | |
429 | * Cleanup the daemon's socket on exit. | |
430 | */ | |
ffe60014 | 431 | void lttng_consumer_cleanup(void); |
3bd1e081 MD |
432 | |
433 | /* | |
434 | * Flush pending writes to trace output disk file. | |
435 | */ | |
ffe60014 DG |
436 | void lttng_consumer_sync_trace_file(struct lttng_consumer_stream *stream, |
437 | off_t orig_offset); | |
3bd1e081 MD |
438 | |
439 | /* | |
440 | * Poll on the should_quit pipe and the command socket return -1 on error and | |
441 | * should exit, 0 if data is available on the command socket | |
442 | */ | |
ffe60014 | 443 | int lttng_consumer_poll_socket(struct pollfd *kconsumer_sockpoll); |
3bd1e081 | 444 | |
d88aee68 DG |
445 | struct lttng_consumer_stream *consumer_allocate_stream(uint64_t channel_key, |
446 | uint64_t stream_key, | |
3bd1e081 | 447 | enum lttng_consumer_stream_state state, |
ffe60014 | 448 | const char *channel_name, |
6df2e2c9 | 449 | uid_t uid, |
00e2e675 | 450 | gid_t gid, |
ffe60014 | 451 | int relayd_id, |
53632229 | 452 | uint64_t session_id, |
ffe60014 DG |
453 | int cpu, |
454 | int *alloc_ret, | |
455 | enum consumer_channel_type type); | |
d88aee68 | 456 | struct lttng_consumer_channel *consumer_allocate_channel(uint64_t key, |
ffe60014 DG |
457 | uint64_t session_id, |
458 | const char *pathname, | |
459 | const char *name, | |
460 | uid_t uid, | |
461 | gid_t gid, | |
462 | int relayd_id, | |
463 | enum lttng_event_output output); | |
464 | void consumer_del_stream(struct lttng_consumer_stream *stream, | |
e316aad5 | 465 | struct lttng_ht *ht); |
ffe60014 | 466 | void consumer_del_metadata_stream(struct lttng_consumer_stream *stream, |
e316aad5 | 467 | struct lttng_ht *ht); |
d8ef542d MD |
468 | int consumer_add_channel(struct lttng_consumer_channel *channel, |
469 | struct lttng_consumer_local_data *ctx); | |
ffe60014 | 470 | void consumer_del_channel(struct lttng_consumer_channel *channel); |
3bd1e081 | 471 | |
00e2e675 | 472 | /* lttng-relayd consumer command */ |
00e2e675 DG |
473 | struct consumer_relayd_sock_pair *consumer_allocate_relayd_sock_pair( |
474 | int net_seq_idx); | |
d88aee68 DG |
475 | struct consumer_relayd_sock_pair *consumer_find_relayd(uint64_t key); |
476 | struct lttng_consumer_channel *consumer_find_channel(uint64_t key); | |
00e2e675 DG |
477 | int consumer_handle_stream_before_relayd(struct lttng_consumer_stream *stream, |
478 | size_t data_size); | |
c869f647 | 479 | void consumer_steal_stream_key(int key, struct lttng_ht *ht); |
00e2e675 | 480 | |
ffe60014 | 481 | struct lttng_consumer_local_data *lttng_consumer_create( |
3bd1e081 | 482 | enum lttng_consumer_type type, |
4078b776 | 483 | ssize_t (*buffer_ready)(struct lttng_consumer_stream *stream, |
d41f73b7 | 484 | struct lttng_consumer_local_data *ctx), |
3bd1e081 MD |
485 | int (*recv_channel)(struct lttng_consumer_channel *channel), |
486 | int (*recv_stream)(struct lttng_consumer_stream *stream), | |
487 | int (*update_stream)(int sessiond_key, uint32_t state)); | |
ffe60014 DG |
488 | void lttng_consumer_destroy(struct lttng_consumer_local_data *ctx); |
489 | ssize_t lttng_consumer_on_read_subbuffer_mmap( | |
3bd1e081 | 490 | struct lttng_consumer_local_data *ctx, |
1d4dfdef DG |
491 | struct lttng_consumer_stream *stream, unsigned long len, |
492 | unsigned long padding); | |
ffe60014 | 493 | ssize_t lttng_consumer_on_read_subbuffer_splice( |
3bd1e081 | 494 | struct lttng_consumer_local_data *ctx, |
1d4dfdef DG |
495 | struct lttng_consumer_stream *stream, unsigned long len, |
496 | unsigned long padding); | |
ffe60014 DG |
497 | int lttng_consumer_take_snapshot(struct lttng_consumer_stream *stream); |
498 | int lttng_consumer_get_produced_snapshot(struct lttng_consumer_stream *stream, | |
3bd1e081 | 499 | unsigned long *pos); |
ffe60014 DG |
500 | void *consumer_thread_metadata_poll(void *data); |
501 | void *consumer_thread_data_poll(void *data); | |
502 | void *consumer_thread_sessiond_poll(void *data); | |
d8ef542d | 503 | void *consumer_thread_channel_poll(void *data); |
ffe60014 | 504 | int lttng_consumer_recv_cmd(struct lttng_consumer_local_data *ctx, |
3bd1e081 MD |
505 | int sock, struct pollfd *consumer_sockpoll); |
506 | ||
4078b776 | 507 | ssize_t lttng_consumer_read_subbuffer(struct lttng_consumer_stream *stream, |
d41f73b7 MD |
508 | struct lttng_consumer_local_data *ctx); |
509 | int lttng_consumer_on_recv_stream(struct lttng_consumer_stream *stream); | |
7735ef9e DG |
510 | int consumer_add_relayd_socket(int net_seq_idx, int sock_type, |
511 | struct lttng_consumer_local_data *ctx, int sock, | |
46e6455f DG |
512 | struct pollfd *consumer_sockpoll, struct lttcomm_sock *relayd_sock, |
513 | unsigned int sessiond_id); | |
a6ba4fe1 DG |
514 | void consumer_flag_relayd_for_destroy( |
515 | struct consumer_relayd_sock_pair *relayd); | |
6d805429 | 516 | int consumer_data_pending(uint64_t id); |
f50f23d9 | 517 | int consumer_send_status_msg(int sock, int ret_code); |
ffe60014 DG |
518 | int consumer_send_status_channel(int sock, |
519 | struct lttng_consumer_channel *channel); | |
d41f73b7 | 520 | |
f02e1e8a | 521 | #endif /* LIB_CONSUMER_H */ |