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> |
acdb9057 | 34 | #include <common/pipe.h> |
3bd1e081 | 35 | |
3bd1e081 MD |
36 | /* Commands for consumer */ |
37 | enum lttng_consumer_command { | |
38 | LTTNG_CONSUMER_ADD_CHANNEL, | |
39 | LTTNG_CONSUMER_ADD_STREAM, | |
40 | /* pause, delete, active depending on fd state */ | |
41 | LTTNG_CONSUMER_UPDATE_STREAM, | |
42 | /* inform the consumer to quit when all fd has hang up */ | |
43 | LTTNG_CONSUMER_STOP, | |
00e2e675 | 44 | LTTNG_CONSUMER_ADD_RELAYD_SOCKET, |
173af62f DG |
45 | /* Inform the consumer to kill a specific relayd connection */ |
46 | LTTNG_CONSUMER_DESTROY_RELAYD, | |
53632229 | 47 | /* Return to the sessiond if there is data pending for a session */ |
6d805429 | 48 | LTTNG_CONSUMER_DATA_PENDING, |
ffe60014 DG |
49 | /* Consumer creates a channel and returns it to sessiond. */ |
50 | LTTNG_CONSUMER_ASK_CHANNEL_CREATION, | |
51 | LTTNG_CONSUMER_GET_CHANNEL, | |
52 | LTTNG_CONSUMER_DESTROY_CHANNEL, | |
d88aee68 DG |
53 | LTTNG_CONSUMER_PUSH_METADATA, |
54 | LTTNG_CONSUMER_CLOSE_METADATA, | |
55 | LTTNG_CONSUMER_SETUP_METADATA, | |
7972aab2 | 56 | LTTNG_CONSUMER_FLUSH_CHANNEL, |
6dc3064a DG |
57 | LTTNG_CONSUMER_SNAPSHOT_CHANNEL, |
58 | LTTNG_CONSUMER_SNAPSHOT_METADATA, | |
3bd1e081 MD |
59 | }; |
60 | ||
61 | /* State of each fd in consumer */ | |
62 | enum lttng_consumer_stream_state { | |
63 | LTTNG_CONSUMER_ACTIVE_STREAM, | |
64 | LTTNG_CONSUMER_PAUSE_STREAM, | |
65 | LTTNG_CONSUMER_DELETE_STREAM, | |
66 | }; | |
67 | ||
3bd1e081 MD |
68 | enum lttng_consumer_type { |
69 | LTTNG_CONSUMER_UNKNOWN = 0, | |
70 | LTTNG_CONSUMER_KERNEL, | |
7753dea8 MD |
71 | LTTNG_CONSUMER64_UST, |
72 | LTTNG_CONSUMER32_UST, | |
3bd1e081 MD |
73 | }; |
74 | ||
8994307f DG |
75 | enum consumer_endpoint_status { |
76 | CONSUMER_ENDPOINT_ACTIVE, | |
77 | CONSUMER_ENDPOINT_INACTIVE, | |
78 | }; | |
79 | ||
ffe60014 DG |
80 | enum consumer_channel_output { |
81 | CONSUMER_CHANNEL_MMAP = 0, | |
82 | CONSUMER_CHANNEL_SPLICE = 1, | |
83 | }; | |
84 | ||
85 | enum consumer_channel_type { | |
86 | CONSUMER_CHANNEL_TYPE_METADATA = 0, | |
d88aee68 | 87 | CONSUMER_CHANNEL_TYPE_DATA = 1, |
ffe60014 DG |
88 | }; |
89 | ||
51230d70 DG |
90 | extern struct lttng_consumer_global_data consumer_data; |
91 | ||
ffe60014 DG |
92 | struct stream_list { |
93 | struct cds_list_head head; | |
94 | unsigned int count; | |
95 | }; | |
96 | ||
331744e3 JD |
97 | /* Stub. */ |
98 | struct consumer_metadata_cache; | |
99 | ||
3bd1e081 | 100 | struct lttng_consumer_channel { |
ffe60014 | 101 | /* HT node used for consumer_data.channel_ht */ |
d88aee68 | 102 | struct lttng_ht_node_u64 node; |
ffe60014 | 103 | /* Indexed key. Incremented value in the consumer. */ |
d88aee68 | 104 | uint64_t key; |
ffe60014 DG |
105 | /* Number of streams referencing this channel */ |
106 | int refcount; | |
107 | /* Tracing session id on the session daemon side. */ | |
108 | uint64_t session_id; | |
1950109e JD |
109 | /* |
110 | * Session id when requesting metadata to the session daemon for | |
111 | * a session with per-PID buffers. | |
112 | */ | |
113 | uint64_t session_id_per_pid; | |
ffe60014 DG |
114 | /* Channel trace file path name. */ |
115 | char pathname[PATH_MAX]; | |
116 | /* Channel name. */ | |
117 | char name[LTTNG_SYMBOL_NAME_LEN]; | |
118 | /* UID and GID of the channel. */ | |
119 | uid_t uid; | |
120 | gid_t gid; | |
da009f2c MD |
121 | /* Relayd id of the channel. -1ULL if it does not apply. */ |
122 | uint64_t relayd_id; | |
c30aaa51 | 123 | /* |
ffe60014 DG |
124 | * Number of streams NOT initialized yet. This is used in order to not |
125 | * delete this channel if streams are getting initialized. | |
c30aaa51 | 126 | */ |
ffe60014 DG |
127 | unsigned int nb_init_stream_left; |
128 | /* Output type (mmap or splice). */ | |
129 | enum consumer_channel_output output; | |
130 | /* Channel type for stream */ | |
131 | enum consumer_channel_type type; | |
c30aaa51 | 132 | |
3bd1e081 | 133 | /* For UST */ |
ffe60014 DG |
134 | struct ustctl_consumer_channel *uchan; |
135 | unsigned char uuid[UUID_STR_LEN]; | |
136 | /* | |
137 | * Temporary stream list used to store the streams once created and waiting | |
138 | * to be sent to the session daemon by receiving the | |
139 | * LTTNG_CONSUMER_GET_CHANNEL. | |
140 | */ | |
141 | struct stream_list streams; | |
07b86b52 | 142 | |
d88aee68 DG |
143 | /* |
144 | * Set if the channel is metadata. We keep a reference to the stream | |
145 | * because we have to flush data once pushed by the session daemon. For a | |
146 | * regular channel, this is always set to NULL. | |
147 | */ | |
148 | struct lttng_consumer_stream *metadata_stream; | |
d8ef542d MD |
149 | |
150 | /* for UST */ | |
151 | int wait_fd; | |
152 | /* Node within channel thread ht */ | |
153 | struct lttng_ht_node_u64 wait_fd_node; | |
331744e3 JD |
154 | |
155 | /* Metadata cache is metadata channel */ | |
156 | struct consumer_metadata_cache *metadata_cache; | |
157 | /* For metadata periodical flush */ | |
158 | int switch_timer_enabled; | |
159 | timer_t switch_timer; | |
4419b4fb MD |
160 | int switch_timer_error; |
161 | ||
1624d5b7 JD |
162 | /* On-disk circular buffer */ |
163 | uint64_t tracefile_size; | |
164 | uint64_t tracefile_count; | |
2bba9e53 DG |
165 | /* |
166 | * Monitor or not the streams of this channel meaning this indicates if the | |
167 | * streams should be sent to the data/metadata thread or added to the no | |
168 | * monitor list of the channel. | |
169 | */ | |
170 | unsigned int monitor; | |
a9838785 MD |
171 | |
172 | /* | |
173 | * Channel lock. | |
174 | * | |
175 | * This is nested INSIDE the consumer data lock. | |
176 | * This is nested OUTSIDE the metadata cache lock. | |
177 | * This is nested OUTSIDE stream lock. | |
178 | * This is nested OUTSIDE consumer_relayd_sock_pair lock. | |
179 | */ | |
180 | pthread_mutex_t lock; | |
3bd1e081 MD |
181 | }; |
182 | ||
3bd1e081 MD |
183 | /* |
184 | * Internal representation of the streams, sessiond_key is used to identify | |
185 | * uniquely a stream. | |
186 | */ | |
187 | struct lttng_consumer_stream { | |
53632229 | 188 | /* HT node used by the data_ht and metadata_ht */ |
d88aee68 | 189 | struct lttng_ht_node_u64 node; |
d8ef542d MD |
190 | /* stream indexed per channel key node */ |
191 | struct lttng_ht_node_u64 node_channel_id; | |
53632229 | 192 | /* HT node used in consumer_data.stream_list_ht */ |
d88aee68 | 193 | struct lttng_ht_node_u64 node_session_id; |
ffe60014 DG |
194 | /* Pointer to associated channel. */ |
195 | struct lttng_consumer_channel *chan; | |
196 | ||
197 | /* Key by which the stream is indexed for 'node'. */ | |
d88aee68 | 198 | uint64_t key; |
3bd1e081 | 199 | /* |
ffe60014 DG |
200 | * File descriptor of the data output file. This can be either a file or a |
201 | * socket fd for relayd streaming. | |
3bd1e081 | 202 | */ |
3bd1e081 | 203 | int out_fd; /* output file to write the data */ |
ffe60014 DG |
204 | /* Write position in the output file descriptor */ |
205 | off_t out_fd_offset; | |
3bd1e081 | 206 | enum lttng_consumer_stream_state state; |
b5c5fc29 | 207 | int shm_fd_is_copy; |
4078b776 | 208 | int data_read; |
d056b477 | 209 | int hangup_flush_done; |
ffe60014 DG |
210 | enum lttng_event_output output; |
211 | /* Maximum subbuffer size. */ | |
212 | unsigned long max_sb_size; | |
213 | ||
214 | /* | |
215 | * Still used by the kernel for MMAP output. For UST, the ustctl getter is | |
216 | * used for the mmap base and offset. | |
217 | */ | |
218 | void *mmap_base; | |
219 | unsigned long mmap_len; | |
220 | ||
221 | /* For UST */ | |
222 | ||
223 | int wait_fd; | |
6df2e2c9 MD |
224 | /* UID/GID of the user owning the session to which stream belongs */ |
225 | uid_t uid; | |
226 | gid_t gid; | |
00e2e675 | 227 | /* Network sequence number. Indicating on which relayd socket it goes. */ |
d88aee68 | 228 | uint64_t net_seq_idx; |
d01178b6 DG |
229 | /* |
230 | * Indicate if this stream was successfully sent to a relayd. This is set | |
231 | * after the refcount of the relayd is incremented and is checked when the | |
232 | * stream is closed before decrementing the refcount in order to avoid an | |
233 | * unbalanced state. | |
234 | */ | |
235 | unsigned int sent_to_relayd; | |
236 | ||
00e2e675 DG |
237 | /* Identify if the stream is the metadata */ |
238 | unsigned int metadata_flag; | |
239 | /* Used when the stream is set for network streaming */ | |
240 | uint64_t relayd_stream_id; | |
3604f373 DG |
241 | /* |
242 | * When sending a stream packet to a relayd, this number is used to track | |
243 | * the packet sent by the consumer and seen by the relayd. When sending the | |
244 | * data header to the relayd, this number is sent and if the transmission | |
245 | * was successful, it is incremented. | |
246 | * | |
247 | * Even if the full data is not fully transmitted it won't matter since | |
248 | * only two possible error can happen after that where either the relayd | |
249 | * died or a read error is detected on the stream making this value useless | |
250 | * after that. | |
251 | * | |
252 | * This value SHOULD be read/updated atomically or with the lock acquired. | |
253 | */ | |
173af62f | 254 | uint64_t next_net_seq_num; |
63281d5d | 255 | /* |
74251bb8 DG |
256 | * Lock to use the stream FDs since they are used between threads. |
257 | * | |
258 | * This is nested INSIDE the consumer_data lock. | |
73811ecc | 259 | * This is nested INSIDE the metadata cache lock. |
a9838785 | 260 | * This is nested INSIDE the channel lock. |
74251bb8 | 261 | * This is nested OUTSIDE consumer_relayd_sock_pair lock. |
63281d5d | 262 | */ |
53632229 DG |
263 | pthread_mutex_t lock; |
264 | /* Tracing session id */ | |
265 | uint64_t session_id; | |
8994307f DG |
266 | /* |
267 | * Indicates if the stream end point is still active or not (network | |
268 | * streaming or local file system). The thread "owning" the stream is | |
269 | * handling this status and can be notified of a state change through the | |
270 | * consumer data appropriate pipe. | |
271 | */ | |
272 | enum consumer_endpoint_status endpoint_status; | |
ffe60014 DG |
273 | /* Stream name. Format is: <channel_name>_<cpu_number> */ |
274 | char name[LTTNG_SYMBOL_NAME_LEN]; | |
275 | /* Internal state of libustctl. */ | |
276 | struct ustctl_consumer_stream *ustream; | |
277 | struct cds_list_head send_node; | |
1624d5b7 JD |
278 | /* On-disk circular buffer */ |
279 | uint64_t tracefile_size_current; | |
280 | uint64_t tracefile_count_current; | |
4891ece8 DG |
281 | /* |
282 | * Monitor or not the streams of this channel meaning this indicates if the | |
283 | * streams should be sent to the data/metadata thread or added to the no | |
284 | * monitor list of the channel. | |
285 | */ | |
286 | unsigned int monitor; | |
287 | /* | |
288 | * Indicate if the stream is globally visible meaning that it has been | |
289 | * added to the multiple hash tables. If *not* set, NO lock should be | |
290 | * acquired in the destroy path. | |
291 | */ | |
292 | unsigned int globally_visible; | |
00e2e675 DG |
293 | }; |
294 | ||
295 | /* | |
296 | * Internal representation of a relayd socket pair. | |
297 | */ | |
298 | struct consumer_relayd_sock_pair { | |
299 | /* Network sequence number. */ | |
da009f2c | 300 | uint64_t net_seq_idx; |
00e2e675 DG |
301 | /* Number of stream associated with this relayd */ |
302 | unsigned int refcount; | |
173af62f DG |
303 | |
304 | /* | |
305 | * This flag indicates whether or not we should destroy this object. The | |
306 | * destruction should ONLY occurs when this flag is set and the refcount is | |
307 | * set to zero. | |
308 | */ | |
309 | unsigned int destroy_flag; | |
310 | ||
51d7db73 DG |
311 | /* |
312 | * Mutex protecting the control socket to avoid out of order packets | |
313 | * between threads sending data to the relayd. Since metadata data is sent | |
314 | * over that socket, at least two sendmsg() are needed (header + data) | |
315 | * creating a race for packets to overlap between threads using it. | |
74251bb8 DG |
316 | * |
317 | * This is nested INSIDE the consumer_data lock. | |
318 | * This is nested INSIDE the stream lock. | |
51d7db73 | 319 | */ |
00e2e675 | 320 | pthread_mutex_t ctrl_sock_mutex; |
51d7db73 DG |
321 | |
322 | /* Control socket. Command and metadata are passed over it */ | |
6151a90f | 323 | struct lttcomm_relayd_sock control_sock; |
51d7db73 DG |
324 | |
325 | /* | |
326 | * We don't need a mutex at this point since we only splice or write single | |
327 | * large chunk of data with a header appended at the begining. Moreover, | |
328 | * this socket is for now only used in a single thread. | |
329 | */ | |
6151a90f | 330 | struct lttcomm_relayd_sock data_sock; |
d88aee68 | 331 | struct lttng_ht_node_u64 node; |
c5b6f4f0 | 332 | |
f7079f67 DG |
333 | /* Session id on both sides for the sockets. */ |
334 | uint64_t relayd_session_id; | |
335 | uint64_t sessiond_session_id; | |
3bd1e081 MD |
336 | }; |
337 | ||
338 | /* | |
339 | * UST consumer local data to the program. One or more instance per | |
340 | * process. | |
341 | */ | |
342 | struct lttng_consumer_local_data { | |
4078b776 MD |
343 | /* |
344 | * Function to call when data is available on a buffer. | |
345 | * Returns the number of bytes read, or negative error value. | |
346 | */ | |
347 | ssize_t (*on_buffer_ready)(struct lttng_consumer_stream *stream, | |
d41f73b7 | 348 | struct lttng_consumer_local_data *ctx); |
3bd1e081 MD |
349 | /* |
350 | * function to call when we receive a new channel, it receives a | |
351 | * newly allocated channel, depending on the return code of this | |
352 | * function, the new channel will be handled by the application | |
353 | * or the library. | |
354 | * | |
355 | * Returns: | |
356 | * > 0 (success, FD is kept by application) | |
357 | * == 0 (success, FD is left to library) | |
358 | * < 0 (error) | |
359 | */ | |
360 | int (*on_recv_channel)(struct lttng_consumer_channel *channel); | |
361 | /* | |
362 | * function to call when we receive a new stream, it receives a | |
363 | * newly allocated stream, depending on the return code of this | |
364 | * function, the new stream will be handled by the application | |
365 | * or the library. | |
366 | * | |
367 | * Returns: | |
368 | * > 0 (success, FD is kept by application) | |
369 | * == 0 (success, FD is left to library) | |
370 | * < 0 (error) | |
371 | */ | |
372 | int (*on_recv_stream)(struct lttng_consumer_stream *stream); | |
373 | /* | |
374 | * function to call when a stream is getting updated by the session | |
375 | * daemon, this function receives the sessiond key and the new | |
376 | * state, depending on the return code of this function the | |
377 | * update of state for the stream is handled by the application | |
378 | * or the library. | |
379 | * | |
380 | * Returns: | |
381 | * > 0 (success, FD is kept by application) | |
382 | * == 0 (success, FD is left to library) | |
383 | * < 0 (error) | |
384 | */ | |
30319bcb | 385 | int (*on_update_stream)(uint64_t sessiond_key, uint32_t state); |
331744e3 | 386 | enum lttng_consumer_type type; |
3bd1e081 MD |
387 | /* socket to communicate errors with sessiond */ |
388 | int consumer_error_socket; | |
331744e3 JD |
389 | /* socket to ask metadata to sessiond */ |
390 | int consumer_metadata_socket; | |
3bd1e081 MD |
391 | /* socket to exchange commands with sessiond */ |
392 | char *consumer_command_sock_path; | |
393 | /* communication with splice */ | |
394 | int consumer_thread_pipe[2]; | |
d8ef542d | 395 | int consumer_channel_pipe[2]; |
fb3a43a9 | 396 | int consumer_splice_metadata_pipe[2]; |
50f8ae69 | 397 | /* Data stream poll thread pipe. To transfer data stream to the thread */ |
acdb9057 | 398 | struct lttng_pipe *consumer_data_pipe; |
3bd1e081 MD |
399 | /* to let the signal handler wake up the fd receiver thread */ |
400 | int consumer_should_quit[2]; | |
fb3a43a9 | 401 | /* Metadata poll thread pipe. Transfer metadata stream to it */ |
13886d2d | 402 | struct lttng_pipe *consumer_metadata_pipe; |
3bd1e081 MD |
403 | }; |
404 | ||
405 | /* | |
406 | * Library-level data. One instance per process. | |
407 | */ | |
408 | struct lttng_consumer_global_data { | |
409 | /* | |
e4421fec DG |
410 | * At this time, this lock is used to ensure coherence between the count |
411 | * and number of element in the hash table. It's also a protection for | |
6065ceec DG |
412 | * concurrent read/write between threads. |
413 | * | |
74251bb8 DG |
414 | * This is nested OUTSIDE the stream lock. |
415 | * This is nested OUTSIDE the consumer_relayd_sock_pair lock. | |
3bd1e081 MD |
416 | */ |
417 | pthread_mutex_t lock; | |
e4421fec | 418 | |
3bd1e081 | 419 | /* |
3cc2f24a DG |
420 | * Number of streams in the data stream hash table declared outside. |
421 | * Protected by consumer_data.lock. | |
3bd1e081 MD |
422 | */ |
423 | int stream_count; | |
3cc2f24a DG |
424 | |
425 | /* Channel hash table protected by consumer_data.lock. */ | |
e4421fec | 426 | struct lttng_ht *channel_ht; |
3bd1e081 MD |
427 | /* |
428 | * Flag specifying if the local array of FDs needs update in the | |
429 | * poll function. Protected by consumer_data.lock. | |
430 | */ | |
431 | unsigned int need_update; | |
432 | enum lttng_consumer_type type; | |
00e2e675 DG |
433 | |
434 | /* | |
435 | * Relayd socket(s) hashtable indexed by network sequence number. Each | |
436 | * stream has an index which associate the right relayd socket to use. | |
437 | */ | |
438 | struct lttng_ht *relayd_ht; | |
53632229 DG |
439 | |
440 | /* | |
441 | * This hash table contains all streams (metadata and data) indexed by | |
442 | * session id. In other words, the ht is indexed by session id and each | |
443 | * bucket contains the list of associated streams. | |
444 | * | |
445 | * This HT uses the "node_session_id" of the consumer stream. | |
446 | */ | |
447 | struct lttng_ht *stream_list_ht; | |
d8ef542d MD |
448 | |
449 | /* | |
450 | * This HT uses the "node_channel_id" of the consumer stream. | |
451 | */ | |
452 | struct lttng_ht *stream_per_chan_id_ht; | |
3bd1e081 MD |
453 | }; |
454 | ||
e4421fec DG |
455 | /* |
456 | * Init consumer data structures. | |
457 | */ | |
ffe60014 | 458 | void lttng_consumer_init(void); |
e4421fec | 459 | |
3bd1e081 MD |
460 | /* |
461 | * Set the error socket for communication with a session daemon. | |
462 | */ | |
ffe60014 DG |
463 | void lttng_consumer_set_error_sock(struct lttng_consumer_local_data *ctx, |
464 | int sock); | |
3bd1e081 MD |
465 | |
466 | /* | |
467 | * Set the command socket path for communication with a session daemon. | |
468 | */ | |
ffe60014 | 469 | void lttng_consumer_set_command_sock_path( |
3bd1e081 MD |
470 | struct lttng_consumer_local_data *ctx, char *sock); |
471 | ||
472 | /* | |
473 | * Send return code to session daemon. | |
474 | * | |
475 | * Returns the return code of sendmsg : the number of bytes transmitted or -1 | |
476 | * on error. | |
477 | */ | |
ffe60014 | 478 | int lttng_consumer_send_error(struct lttng_consumer_local_data *ctx, int cmd); |
3bd1e081 MD |
479 | |
480 | /* | |
481 | * Called from signal handler to ensure a clean exit. | |
482 | */ | |
ffe60014 | 483 | void lttng_consumer_should_exit(struct lttng_consumer_local_data *ctx); |
3bd1e081 MD |
484 | |
485 | /* | |
486 | * Cleanup the daemon's socket on exit. | |
487 | */ | |
ffe60014 | 488 | void lttng_consumer_cleanup(void); |
3bd1e081 MD |
489 | |
490 | /* | |
491 | * Flush pending writes to trace output disk file. | |
492 | */ | |
ffe60014 DG |
493 | void lttng_consumer_sync_trace_file(struct lttng_consumer_stream *stream, |
494 | off_t orig_offset); | |
3bd1e081 MD |
495 | |
496 | /* | |
497 | * Poll on the should_quit pipe and the command socket return -1 on error and | |
498 | * should exit, 0 if data is available on the command socket | |
499 | */ | |
ffe60014 | 500 | int lttng_consumer_poll_socket(struct pollfd *kconsumer_sockpoll); |
3bd1e081 | 501 | |
d88aee68 DG |
502 | struct lttng_consumer_stream *consumer_allocate_stream(uint64_t channel_key, |
503 | uint64_t stream_key, | |
3bd1e081 | 504 | enum lttng_consumer_stream_state state, |
ffe60014 | 505 | const char *channel_name, |
6df2e2c9 | 506 | uid_t uid, |
00e2e675 | 507 | gid_t gid, |
57a269f2 | 508 | uint64_t relayd_id, |
53632229 | 509 | uint64_t session_id, |
ffe60014 DG |
510 | int cpu, |
511 | int *alloc_ret, | |
4891ece8 DG |
512 | enum consumer_channel_type type, |
513 | unsigned int monitor); | |
d88aee68 | 514 | struct lttng_consumer_channel *consumer_allocate_channel(uint64_t key, |
ffe60014 DG |
515 | uint64_t session_id, |
516 | const char *pathname, | |
517 | const char *name, | |
518 | uid_t uid, | |
519 | gid_t gid, | |
57a269f2 | 520 | uint64_t relayd_id, |
1624d5b7 JD |
521 | enum lttng_event_output output, |
522 | uint64_t tracefile_size, | |
2bba9e53 | 523 | uint64_t tracefile_count, |
1950109e | 524 | uint64_t session_id_per_pid, |
2bba9e53 | 525 | unsigned int monitor); |
ffe60014 | 526 | void consumer_del_stream(struct lttng_consumer_stream *stream, |
e316aad5 | 527 | struct lttng_ht *ht); |
ffe60014 | 528 | void consumer_del_metadata_stream(struct lttng_consumer_stream *stream, |
e316aad5 | 529 | struct lttng_ht *ht); |
d8ef542d MD |
530 | int consumer_add_channel(struct lttng_consumer_channel *channel, |
531 | struct lttng_consumer_local_data *ctx); | |
ffe60014 | 532 | void consumer_del_channel(struct lttng_consumer_channel *channel); |
3bd1e081 | 533 | |
00e2e675 | 534 | /* lttng-relayd consumer command */ |
00e2e675 | 535 | struct consumer_relayd_sock_pair *consumer_allocate_relayd_sock_pair( |
da009f2c | 536 | uint64_t net_seq_idx); |
d88aee68 | 537 | struct consumer_relayd_sock_pair *consumer_find_relayd(uint64_t key); |
10a50311 JD |
538 | int consumer_send_relayd_stream(struct lttng_consumer_stream *stream, char *path); |
539 | void close_relayd_stream(struct lttng_consumer_stream *stream); | |
d88aee68 | 540 | struct lttng_consumer_channel *consumer_find_channel(uint64_t key); |
00e2e675 DG |
541 | int consumer_handle_stream_before_relayd(struct lttng_consumer_stream *stream, |
542 | size_t data_size); | |
c869f647 | 543 | void consumer_steal_stream_key(int key, struct lttng_ht *ht); |
00e2e675 | 544 | |
ffe60014 | 545 | struct lttng_consumer_local_data *lttng_consumer_create( |
3bd1e081 | 546 | enum lttng_consumer_type type, |
4078b776 | 547 | ssize_t (*buffer_ready)(struct lttng_consumer_stream *stream, |
d41f73b7 | 548 | struct lttng_consumer_local_data *ctx), |
3bd1e081 MD |
549 | int (*recv_channel)(struct lttng_consumer_channel *channel), |
550 | int (*recv_stream)(struct lttng_consumer_stream *stream), | |
30319bcb | 551 | int (*update_stream)(uint64_t sessiond_key, uint32_t state)); |
ffe60014 DG |
552 | void lttng_consumer_destroy(struct lttng_consumer_local_data *ctx); |
553 | ssize_t lttng_consumer_on_read_subbuffer_mmap( | |
3bd1e081 | 554 | struct lttng_consumer_local_data *ctx, |
1d4dfdef DG |
555 | struct lttng_consumer_stream *stream, unsigned long len, |
556 | unsigned long padding); | |
ffe60014 | 557 | ssize_t lttng_consumer_on_read_subbuffer_splice( |
3bd1e081 | 558 | struct lttng_consumer_local_data *ctx, |
1d4dfdef DG |
559 | struct lttng_consumer_stream *stream, unsigned long len, |
560 | unsigned long padding); | |
ffe60014 DG |
561 | int lttng_consumer_take_snapshot(struct lttng_consumer_stream *stream); |
562 | int lttng_consumer_get_produced_snapshot(struct lttng_consumer_stream *stream, | |
3bd1e081 | 563 | unsigned long *pos); |
ffe60014 DG |
564 | void *consumer_thread_metadata_poll(void *data); |
565 | void *consumer_thread_data_poll(void *data); | |
566 | void *consumer_thread_sessiond_poll(void *data); | |
d8ef542d | 567 | void *consumer_thread_channel_poll(void *data); |
ffe60014 | 568 | int lttng_consumer_recv_cmd(struct lttng_consumer_local_data *ctx, |
3bd1e081 MD |
569 | int sock, struct pollfd *consumer_sockpoll); |
570 | ||
4078b776 | 571 | ssize_t lttng_consumer_read_subbuffer(struct lttng_consumer_stream *stream, |
d41f73b7 MD |
572 | struct lttng_consumer_local_data *ctx); |
573 | int lttng_consumer_on_recv_stream(struct lttng_consumer_stream *stream); | |
da009f2c | 574 | int consumer_add_relayd_socket(uint64_t net_seq_idx, int sock_type, |
7735ef9e | 575 | struct lttng_consumer_local_data *ctx, int sock, |
6151a90f | 576 | struct pollfd *consumer_sockpoll, struct lttcomm_relayd_sock *relayd_sock, |
30319bcb | 577 | uint64_t sessiond_id); |
a6ba4fe1 DG |
578 | void consumer_flag_relayd_for_destroy( |
579 | struct consumer_relayd_sock_pair *relayd); | |
6d805429 | 580 | int consumer_data_pending(uint64_t id); |
f50f23d9 | 581 | int consumer_send_status_msg(int sock, int ret_code); |
ffe60014 DG |
582 | int consumer_send_status_channel(int sock, |
583 | struct lttng_consumer_channel *channel); | |
a0cbdd2e MD |
584 | void notify_thread_del_channel(struct lttng_consumer_local_data *ctx, |
585 | uint64_t key); | |
51230d70 | 586 | void consumer_destroy_relayd(struct consumer_relayd_sock_pair *relayd); |
5c786ded JD |
587 | unsigned long consumer_get_consumed_maxsize(unsigned long consumed_pos, |
588 | unsigned long produced_pos, uint64_t max_stream_size); | |
d41f73b7 | 589 | |
f02e1e8a | 590 | #endif /* LIB_CONSUMER_H */ |