Note find_ust_app_context must be called with RCU read lock
[lttng-tools.git] / src / common / consumer.h
CommitLineData
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1/*
2 * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
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3 * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
4 * 2012 - David Goulet <dgoulet@efficios.com>
3bd1e081 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.
3bd1e081 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
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * more details.
3bd1e081 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
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20#ifndef LIB_CONSUMER_H
21#define LIB_CONSUMER_H
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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
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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>
acdb9057 34#include <common/pipe.h>
50adc264 35#include <common/index/ctf-index.h>
3bd1e081 36
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37/* Commands for consumer */
38enum lttng_consumer_command {
39 LTTNG_CONSUMER_ADD_CHANNEL,
40 LTTNG_CONSUMER_ADD_STREAM,
41 /* pause, delete, active depending on fd state */
42 LTTNG_CONSUMER_UPDATE_STREAM,
43 /* inform the consumer to quit when all fd has hang up */
84382d49 44 LTTNG_CONSUMER_STOP, /* deprecated */
00e2e675 45 LTTNG_CONSUMER_ADD_RELAYD_SOCKET,
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46 /* Inform the consumer to kill a specific relayd connection */
47 LTTNG_CONSUMER_DESTROY_RELAYD,
53632229 48 /* Return to the sessiond if there is data pending for a session */
6d805429 49 LTTNG_CONSUMER_DATA_PENDING,
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50 /* Consumer creates a channel and returns it to sessiond. */
51 LTTNG_CONSUMER_ASK_CHANNEL_CREATION,
52 LTTNG_CONSUMER_GET_CHANNEL,
53 LTTNG_CONSUMER_DESTROY_CHANNEL,
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54 LTTNG_CONSUMER_PUSH_METADATA,
55 LTTNG_CONSUMER_CLOSE_METADATA,
56 LTTNG_CONSUMER_SETUP_METADATA,
7972aab2 57 LTTNG_CONSUMER_FLUSH_CHANNEL,
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58 LTTNG_CONSUMER_SNAPSHOT_CHANNEL,
59 LTTNG_CONSUMER_SNAPSHOT_METADATA,
a4baae1b 60 LTTNG_CONSUMER_STREAMS_SENT,
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61};
62
63/* State of each fd in consumer */
64enum lttng_consumer_stream_state {
65 LTTNG_CONSUMER_ACTIVE_STREAM,
66 LTTNG_CONSUMER_PAUSE_STREAM,
67 LTTNG_CONSUMER_DELETE_STREAM,
68};
69
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70enum lttng_consumer_type {
71 LTTNG_CONSUMER_UNKNOWN = 0,
72 LTTNG_CONSUMER_KERNEL,
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73 LTTNG_CONSUMER64_UST,
74 LTTNG_CONSUMER32_UST,
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75};
76
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77enum consumer_endpoint_status {
78 CONSUMER_ENDPOINT_ACTIVE,
79 CONSUMER_ENDPOINT_INACTIVE,
80};
81
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82enum consumer_channel_output {
83 CONSUMER_CHANNEL_MMAP = 0,
84 CONSUMER_CHANNEL_SPLICE = 1,
85};
86
87enum consumer_channel_type {
88 CONSUMER_CHANNEL_TYPE_METADATA = 0,
d88aee68 89 CONSUMER_CHANNEL_TYPE_DATA = 1,
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90};
91
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92extern struct lttng_consumer_global_data consumer_data;
93
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94struct stream_list {
95 struct cds_list_head head;
96 unsigned int count;
97};
98
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99/* Stub. */
100struct consumer_metadata_cache;
101
3bd1e081 102struct lttng_consumer_channel {
ffe60014 103 /* HT node used for consumer_data.channel_ht */
d88aee68 104 struct lttng_ht_node_u64 node;
ffe60014 105 /* Indexed key. Incremented value in the consumer. */
d88aee68 106 uint64_t key;
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107 /* Number of streams referencing this channel */
108 int refcount;
109 /* Tracing session id on the session daemon side. */
110 uint64_t session_id;
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111 /*
112 * Session id when requesting metadata to the session daemon for
113 * a session with per-PID buffers.
114 */
115 uint64_t session_id_per_pid;
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116 /* Channel trace file path name. */
117 char pathname[PATH_MAX];
118 /* Channel name. */
119 char name[LTTNG_SYMBOL_NAME_LEN];
567eb353 120 /* UID and GID of the session owning this channel. */
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121 uid_t uid;
122 gid_t gid;
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123 /* Relayd id of the channel. -1ULL if it does not apply. */
124 uint64_t relayd_id;
c30aaa51 125 /*
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126 * Number of streams NOT initialized yet. This is used in order to not
127 * delete this channel if streams are getting initialized.
c30aaa51 128 */
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129 unsigned int nb_init_stream_left;
130 /* Output type (mmap or splice). */
131 enum consumer_channel_output output;
132 /* Channel type for stream */
133 enum consumer_channel_type type;
c30aaa51 134
3bd1e081 135 /* For UST */
567eb353 136 uid_t ust_app_uid; /* Application UID. */
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137 struct ustctl_consumer_channel *uchan;
138 unsigned char uuid[UUID_STR_LEN];
139 /*
140 * Temporary stream list used to store the streams once created and waiting
141 * to be sent to the session daemon by receiving the
142 * LTTNG_CONSUMER_GET_CHANNEL.
143 */
144 struct stream_list streams;
07b86b52 145
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146 /*
147 * Set if the channel is metadata. We keep a reference to the stream
148 * because we have to flush data once pushed by the session daemon. For a
149 * regular channel, this is always set to NULL.
150 */
151 struct lttng_consumer_stream *metadata_stream;
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152
153 /* for UST */
154 int wait_fd;
155 /* Node within channel thread ht */
156 struct lttng_ht_node_u64 wait_fd_node;
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157
158 /* Metadata cache is metadata channel */
159 struct consumer_metadata_cache *metadata_cache;
d3e2ba59 160 /* For UST metadata periodical flush */
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161 int switch_timer_enabled;
162 timer_t switch_timer;
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163 int switch_timer_error;
164
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165 /* For the live mode */
166 int live_timer_enabled;
167 timer_t live_timer;
168 int live_timer_error;
169
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170 /* On-disk circular buffer */
171 uint64_t tracefile_size;
172 uint64_t tracefile_count;
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173 /*
174 * Monitor or not the streams of this channel meaning this indicates if the
175 * streams should be sent to the data/metadata thread or added to the no
176 * monitor list of the channel.
177 */
178 unsigned int monitor;
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179
180 /*
181 * Channel lock.
182 *
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183 * This lock protects against concurrent update of channel.
184 *
a9838785 185 * This is nested INSIDE the consumer data lock.
ec6ea7d0 186 * This is nested OUTSIDE the channel timer lock.
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187 * This is nested OUTSIDE the metadata cache lock.
188 * This is nested OUTSIDE stream lock.
189 * This is nested OUTSIDE consumer_relayd_sock_pair lock.
190 */
191 pthread_mutex_t lock;
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192
193 /*
194 * Channel teardown lock.
195 *
196 * This lock protect against teardown of channel. It is _never_
197 * taken by the timer handler.
198 *
199 * This is nested INSIDE the consumer data lock.
200 * This is nested INSIDE the channel lock.
201 * This is nested OUTSIDE the metadata cache lock.
202 * This is nested OUTSIDE stream lock.
203 * This is nested OUTSIDE consumer_relayd_sock_pair lock.
204 */
205 pthread_mutex_t timer_lock;
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206
207 /* Timer value in usec for live streaming. */
208 unsigned int live_timer_interval;
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209};
210
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211/*
212 * Internal representation of the streams, sessiond_key is used to identify
213 * uniquely a stream.
214 */
215struct lttng_consumer_stream {
53632229 216 /* HT node used by the data_ht and metadata_ht */
d88aee68 217 struct lttng_ht_node_u64 node;
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218 /* stream indexed per channel key node */
219 struct lttng_ht_node_u64 node_channel_id;
53632229 220 /* HT node used in consumer_data.stream_list_ht */
d88aee68 221 struct lttng_ht_node_u64 node_session_id;
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222 /* Pointer to associated channel. */
223 struct lttng_consumer_channel *chan;
224
225 /* Key by which the stream is indexed for 'node'. */
d88aee68 226 uint64_t key;
3bd1e081 227 /*
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228 * File descriptor of the data output file. This can be either a file or a
229 * socket fd for relayd streaming.
3bd1e081 230 */
3bd1e081 231 int out_fd; /* output file to write the data */
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232 /* Write position in the output file descriptor */
233 off_t out_fd_offset;
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234 /* Amount of bytes written to the output */
235 uint64_t output_written;
3bd1e081 236 enum lttng_consumer_stream_state state;
b5c5fc29 237 int shm_fd_is_copy;
4078b776 238 int data_read;
d056b477 239 int hangup_flush_done;
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240 enum lttng_event_output output;
241 /* Maximum subbuffer size. */
242 unsigned long max_sb_size;
243
244 /*
245 * Still used by the kernel for MMAP output. For UST, the ustctl getter is
246 * used for the mmap base and offset.
247 */
248 void *mmap_base;
249 unsigned long mmap_len;
250
251 /* For UST */
252
253 int wait_fd;
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254 /* UID/GID of the user owning the session to which stream belongs */
255 uid_t uid;
256 gid_t gid;
00e2e675 257 /* Network sequence number. Indicating on which relayd socket it goes. */
d88aee68 258 uint64_t net_seq_idx;
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259 /*
260 * Indicate if this stream was successfully sent to a relayd. This is set
261 * after the refcount of the relayd is incremented and is checked when the
262 * stream is closed before decrementing the refcount in order to avoid an
263 * unbalanced state.
264 */
265 unsigned int sent_to_relayd;
266
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267 /* Identify if the stream is the metadata */
268 unsigned int metadata_flag;
269 /* Used when the stream is set for network streaming */
270 uint64_t relayd_stream_id;
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271 /*
272 * When sending a stream packet to a relayd, this number is used to track
273 * the packet sent by the consumer and seen by the relayd. When sending the
274 * data header to the relayd, this number is sent and if the transmission
275 * was successful, it is incremented.
276 *
277 * Even if the full data is not fully transmitted it won't matter since
278 * only two possible error can happen after that where either the relayd
279 * died or a read error is detected on the stream making this value useless
280 * after that.
281 *
282 * This value SHOULD be read/updated atomically or with the lock acquired.
283 */
173af62f 284 uint64_t next_net_seq_num;
63281d5d 285 /*
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286 * Lock to use the stream FDs since they are used between threads.
287 *
288 * This is nested INSIDE the consumer_data lock.
73811ecc 289 * This is nested INSIDE the metadata cache lock.
a9838785 290 * This is nested INSIDE the channel lock.
ec6ea7d0 291 * This is nested INSIDE the channel timer lock.
74251bb8 292 * This is nested OUTSIDE consumer_relayd_sock_pair lock.
63281d5d 293 */
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294 pthread_mutex_t lock;
295 /* Tracing session id */
296 uint64_t session_id;
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297 /*
298 * Indicates if the stream end point is still active or not (network
299 * streaming or local file system). The thread "owning" the stream is
300 * handling this status and can be notified of a state change through the
301 * consumer data appropriate pipe.
302 */
303 enum consumer_endpoint_status endpoint_status;
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304 /* Stream name. Format is: <channel_name>_<cpu_number> */
305 char name[LTTNG_SYMBOL_NAME_LEN];
306 /* Internal state of libustctl. */
307 struct ustctl_consumer_stream *ustream;
308 struct cds_list_head send_node;
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309 /* On-disk circular buffer */
310 uint64_t tracefile_size_current;
311 uint64_t tracefile_count_current;
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312 /*
313 * Monitor or not the streams of this channel meaning this indicates if the
314 * streams should be sent to the data/metadata thread or added to the no
315 * monitor list of the channel.
316 */
317 unsigned int monitor;
318 /*
319 * Indicate if the stream is globally visible meaning that it has been
320 * added to the multiple hash tables. If *not* set, NO lock should be
321 * acquired in the destroy path.
322 */
323 unsigned int globally_visible;
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324 /*
325 * Pipe to wake up the metadata poll thread when the UST metadata
326 * cache is updated.
327 */
328 int ust_metadata_poll_pipe[2];
329 /*
330 * How much metadata was read from the metadata cache and sent
331 * to the channel.
332 */
333 uint64_t ust_metadata_pushed;
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334 /*
335 * FD of the index file for this stream.
336 */
337 int index_fd;
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338
339 /*
340 * Rendez-vous point between data and metadata stream in live mode.
341 */
342 pthread_cond_t metadata_rdv;
343 pthread_mutex_t metadata_rdv_lock;
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344
345 /* Indicate if the stream still has some data to be read. */
346 unsigned int has_data:1;
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347};
348
349/*
350 * Internal representation of a relayd socket pair.
351 */
352struct consumer_relayd_sock_pair {
353 /* Network sequence number. */
da009f2c 354 uint64_t net_seq_idx;
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355 /* Number of stream associated with this relayd */
356 unsigned int refcount;
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357
358 /*
359 * This flag indicates whether or not we should destroy this object. The
360 * destruction should ONLY occurs when this flag is set and the refcount is
361 * set to zero.
362 */
363 unsigned int destroy_flag;
364
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365 /*
366 * Mutex protecting the control socket to avoid out of order packets
367 * between threads sending data to the relayd. Since metadata data is sent
368 * over that socket, at least two sendmsg() are needed (header + data)
369 * creating a race for packets to overlap between threads using it.
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370 *
371 * This is nested INSIDE the consumer_data lock.
372 * This is nested INSIDE the stream lock.
51d7db73 373 */
00e2e675 374 pthread_mutex_t ctrl_sock_mutex;
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375
376 /* Control socket. Command and metadata are passed over it */
6151a90f 377 struct lttcomm_relayd_sock control_sock;
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378
379 /*
380 * We don't need a mutex at this point since we only splice or write single
381 * large chunk of data with a header appended at the begining. Moreover,
382 * this socket is for now only used in a single thread.
383 */
6151a90f 384 struct lttcomm_relayd_sock data_sock;
d88aee68 385 struct lttng_ht_node_u64 node;
c5b6f4f0 386
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387 /* Session id on both sides for the sockets. */
388 uint64_t relayd_session_id;
389 uint64_t sessiond_session_id;
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390};
391
392/*
393 * UST consumer local data to the program. One or more instance per
394 * process.
395 */
396struct lttng_consumer_local_data {
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397 /*
398 * Function to call when data is available on a buffer.
399 * Returns the number of bytes read, or negative error value.
400 */
401 ssize_t (*on_buffer_ready)(struct lttng_consumer_stream *stream,
d41f73b7 402 struct lttng_consumer_local_data *ctx);
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403 /*
404 * function to call when we receive a new channel, it receives a
405 * newly allocated channel, depending on the return code of this
406 * function, the new channel will be handled by the application
407 * or the library.
408 *
409 * Returns:
410 * > 0 (success, FD is kept by application)
411 * == 0 (success, FD is left to library)
412 * < 0 (error)
413 */
414 int (*on_recv_channel)(struct lttng_consumer_channel *channel);
415 /*
416 * function to call when we receive a new stream, it receives a
417 * newly allocated stream, depending on the return code of this
418 * function, the new stream will be handled by the application
419 * or the library.
420 *
421 * Returns:
422 * > 0 (success, FD is kept by application)
423 * == 0 (success, FD is left to library)
424 * < 0 (error)
425 */
426 int (*on_recv_stream)(struct lttng_consumer_stream *stream);
427 /*
428 * function to call when a stream is getting updated by the session
429 * daemon, this function receives the sessiond key and the new
430 * state, depending on the return code of this function the
431 * update of state for the stream is handled by the application
432 * or the library.
433 *
434 * Returns:
435 * > 0 (success, FD is kept by application)
436 * == 0 (success, FD is left to library)
437 * < 0 (error)
438 */
30319bcb 439 int (*on_update_stream)(uint64_t sessiond_key, uint32_t state);
331744e3 440 enum lttng_consumer_type type;
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441 /* socket to communicate errors with sessiond */
442 int consumer_error_socket;
75d83e50 443 /* socket to ask metadata to sessiond. */
331744e3 444 int consumer_metadata_socket;
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445 /*
446 * Protect consumer_metadata_socket.
447 *
448 * This is nested OUTSIDE the metadata cache lock.
449 */
75d83e50 450 pthread_mutex_t metadata_socket_lock;
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451 /* socket to exchange commands with sessiond */
452 char *consumer_command_sock_path;
453 /* communication with splice */
454 int consumer_thread_pipe[2];
d8ef542d 455 int consumer_channel_pipe[2];
fb3a43a9 456 int consumer_splice_metadata_pipe[2];
50f8ae69 457 /* Data stream poll thread pipe. To transfer data stream to the thread */
acdb9057 458 struct lttng_pipe *consumer_data_pipe;
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459
460 /*
461 * Data thread use that pipe to catch wakeup from read subbuffer that
462 * detects that there is still data to be read for the stream encountered.
463 * Before doing so, the stream is flagged to indicate that there is still
464 * data to be read.
465 *
466 * Both pipes (read/write) are owned and used inside the data thread.
467 */
468 struct lttng_pipe *consumer_wakeup_pipe;
469 /* Indicate if the wakeup thread has been notified. */
470 unsigned int has_wakeup:1;
471
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472 /* to let the signal handler wake up the fd receiver thread */
473 int consumer_should_quit[2];
fb3a43a9 474 /* Metadata poll thread pipe. Transfer metadata stream to it */
13886d2d 475 struct lttng_pipe *consumer_metadata_pipe;
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476};
477
478/*
479 * Library-level data. One instance per process.
480 */
481struct lttng_consumer_global_data {
482 /*
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483 * At this time, this lock is used to ensure coherence between the count
484 * and number of element in the hash table. It's also a protection for
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485 * concurrent read/write between threads.
486 *
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487 * This is nested OUTSIDE the stream lock.
488 * This is nested OUTSIDE the consumer_relayd_sock_pair lock.
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489 */
490 pthread_mutex_t lock;
e4421fec 491
3bd1e081 492 /*
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493 * Number of streams in the data stream hash table declared outside.
494 * Protected by consumer_data.lock.
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495 */
496 int stream_count;
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497
498 /* Channel hash table protected by consumer_data.lock. */
e4421fec 499 struct lttng_ht *channel_ht;
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500 /*
501 * Flag specifying if the local array of FDs needs update in the
502 * poll function. Protected by consumer_data.lock.
503 */
504 unsigned int need_update;
505 enum lttng_consumer_type type;
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506
507 /*
508 * Relayd socket(s) hashtable indexed by network sequence number. Each
509 * stream has an index which associate the right relayd socket to use.
510 */
511 struct lttng_ht *relayd_ht;
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512
513 /*
514 * This hash table contains all streams (metadata and data) indexed by
515 * session id. In other words, the ht is indexed by session id and each
516 * bucket contains the list of associated streams.
517 *
518 * This HT uses the "node_session_id" of the consumer stream.
519 */
520 struct lttng_ht *stream_list_ht;
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521
522 /*
523 * This HT uses the "node_channel_id" of the consumer stream.
524 */
525 struct lttng_ht *stream_per_chan_id_ht;
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526};
527
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528/*
529 * Init consumer data structures.
530 */
282dadbc 531int lttng_consumer_init(void);
e4421fec 532
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533/*
534 * Set the error socket for communication with a session daemon.
535 */
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536void lttng_consumer_set_error_sock(struct lttng_consumer_local_data *ctx,
537 int sock);
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538
539/*
540 * Set the command socket path for communication with a session daemon.
541 */
ffe60014 542void lttng_consumer_set_command_sock_path(
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543 struct lttng_consumer_local_data *ctx, char *sock);
544
545/*
546 * Send return code to session daemon.
547 *
548 * Returns the return code of sendmsg : the number of bytes transmitted or -1
549 * on error.
550 */
ffe60014 551int lttng_consumer_send_error(struct lttng_consumer_local_data *ctx, int cmd);
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552
553/*
554 * Called from signal handler to ensure a clean exit.
555 */
ffe60014 556void lttng_consumer_should_exit(struct lttng_consumer_local_data *ctx);
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557
558/*
559 * Cleanup the daemon's socket on exit.
560 */
ffe60014 561void lttng_consumer_cleanup(void);
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562
563/*
564 * Flush pending writes to trace output disk file.
565 */
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566void lttng_consumer_sync_trace_file(struct lttng_consumer_stream *stream,
567 off_t orig_offset);
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568
569/*
570 * Poll on the should_quit pipe and the command socket return -1 on error and
571 * should exit, 0 if data is available on the command socket
572 */
ffe60014 573int lttng_consumer_poll_socket(struct pollfd *kconsumer_sockpoll);
3bd1e081 574
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575struct lttng_consumer_stream *consumer_allocate_stream(uint64_t channel_key,
576 uint64_t stream_key,
3bd1e081 577 enum lttng_consumer_stream_state state,
ffe60014 578 const char *channel_name,
6df2e2c9 579 uid_t uid,
00e2e675 580 gid_t gid,
57a269f2 581 uint64_t relayd_id,
53632229 582 uint64_t session_id,
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583 int cpu,
584 int *alloc_ret,
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585 enum consumer_channel_type type,
586 unsigned int monitor);
d88aee68 587struct lttng_consumer_channel *consumer_allocate_channel(uint64_t key,
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588 uint64_t session_id,
589 const char *pathname,
590 const char *name,
591 uid_t uid,
592 gid_t gid,
57a269f2 593 uint64_t relayd_id,
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594 enum lttng_event_output output,
595 uint64_t tracefile_size,
2bba9e53 596 uint64_t tracefile_count,
1950109e 597 uint64_t session_id_per_pid,
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598 unsigned int monitor,
599 unsigned int live_timer_interval);
ffe60014 600void consumer_del_stream(struct lttng_consumer_stream *stream,
e316aad5 601 struct lttng_ht *ht);
ffe60014 602void consumer_del_metadata_stream(struct lttng_consumer_stream *stream,
e316aad5 603 struct lttng_ht *ht);
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604int consumer_add_channel(struct lttng_consumer_channel *channel,
605 struct lttng_consumer_local_data *ctx);
ffe60014 606void consumer_del_channel(struct lttng_consumer_channel *channel);
3bd1e081 607
00e2e675 608/* lttng-relayd consumer command */
00e2e675 609struct consumer_relayd_sock_pair *consumer_allocate_relayd_sock_pair(
da009f2c 610 uint64_t net_seq_idx);
d88aee68 611struct consumer_relayd_sock_pair *consumer_find_relayd(uint64_t key);
10a50311 612int consumer_send_relayd_stream(struct lttng_consumer_stream *stream, char *path);
a4baae1b 613int consumer_send_relayd_streams_sent(uint64_t net_seq_idx);
10a50311 614void close_relayd_stream(struct lttng_consumer_stream *stream);
d88aee68 615struct lttng_consumer_channel *consumer_find_channel(uint64_t key);
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616int consumer_handle_stream_before_relayd(struct lttng_consumer_stream *stream,
617 size_t data_size);
c869f647 618void consumer_steal_stream_key(int key, struct lttng_ht *ht);
00e2e675 619
ffe60014 620struct lttng_consumer_local_data *lttng_consumer_create(
3bd1e081 621 enum lttng_consumer_type type,
4078b776 622 ssize_t (*buffer_ready)(struct lttng_consumer_stream *stream,
d41f73b7 623 struct lttng_consumer_local_data *ctx),
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624 int (*recv_channel)(struct lttng_consumer_channel *channel),
625 int (*recv_stream)(struct lttng_consumer_stream *stream),
30319bcb 626 int (*update_stream)(uint64_t sessiond_key, uint32_t state));
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627void lttng_consumer_destroy(struct lttng_consumer_local_data *ctx);
628ssize_t lttng_consumer_on_read_subbuffer_mmap(
3bd1e081 629 struct lttng_consumer_local_data *ctx,
1d4dfdef 630 struct lttng_consumer_stream *stream, unsigned long len,
309167d2 631 unsigned long padding,
50adc264 632 struct ctf_packet_index *index);
ffe60014 633ssize_t lttng_consumer_on_read_subbuffer_splice(
3bd1e081 634 struct lttng_consumer_local_data *ctx,
1d4dfdef 635 struct lttng_consumer_stream *stream, unsigned long len,
309167d2 636 unsigned long padding,
50adc264 637 struct ctf_packet_index *index);
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638int lttng_consumer_take_snapshot(struct lttng_consumer_stream *stream);
639int lttng_consumer_get_produced_snapshot(struct lttng_consumer_stream *stream,
3bd1e081 640 unsigned long *pos);
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641int lttng_ustconsumer_get_wakeup_fd(struct lttng_consumer_stream *stream);
642int lttng_ustconsumer_close_wakeup_fd(struct lttng_consumer_stream *stream);
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643void *consumer_thread_metadata_poll(void *data);
644void *consumer_thread_data_poll(void *data);
645void *consumer_thread_sessiond_poll(void *data);
d8ef542d 646void *consumer_thread_channel_poll(void *data);
ffe60014 647int lttng_consumer_recv_cmd(struct lttng_consumer_local_data *ctx,
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648 int sock, struct pollfd *consumer_sockpoll);
649
4078b776 650ssize_t lttng_consumer_read_subbuffer(struct lttng_consumer_stream *stream,
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651 struct lttng_consumer_local_data *ctx);
652int lttng_consumer_on_recv_stream(struct lttng_consumer_stream *stream);
da009f2c 653int consumer_add_relayd_socket(uint64_t net_seq_idx, int sock_type,
7735ef9e 654 struct lttng_consumer_local_data *ctx, int sock,
6151a90f 655 struct pollfd *consumer_sockpoll, struct lttcomm_relayd_sock *relayd_sock,
d3e2ba59 656 uint64_t sessiond_id, uint64_t relayd_session_id);
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657void consumer_flag_relayd_for_destroy(
658 struct consumer_relayd_sock_pair *relayd);
6d805429 659int consumer_data_pending(uint64_t id);
f50f23d9 660int consumer_send_status_msg(int sock, int ret_code);
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661int consumer_send_status_channel(int sock,
662 struct lttng_consumer_channel *channel);
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663void notify_thread_del_channel(struct lttng_consumer_local_data *ctx,
664 uint64_t key);
51230d70 665void consumer_destroy_relayd(struct consumer_relayd_sock_pair *relayd);
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666unsigned long consumer_get_consumed_maxsize(unsigned long consumed_pos,
667 unsigned long produced_pos, uint64_t max_stream_size);
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668int consumer_add_data_stream(struct lttng_consumer_stream *stream);
669void consumer_del_stream_for_data(struct lttng_consumer_stream *stream);
670int consumer_add_metadata_stream(struct lttng_consumer_stream *stream);
671void consumer_del_stream_for_metadata(struct lttng_consumer_stream *stream);
309167d2 672int consumer_create_index_file(struct lttng_consumer_stream *stream);
d41f73b7 673
f02e1e8a 674#endif /* LIB_CONSUMER_H */
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