Commit | Line | Data |
---|---|---|
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> |
50adc264 | 35 | #include <common/index/ctf-index.h> |
3bd1e081 | 36 | |
3bd1e081 MD |
37 | /* Commands for consumer */ |
38 | enum 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, |
173af62f DG |
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, |
ffe60014 DG |
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, | |
d88aee68 DG |
54 | LTTNG_CONSUMER_PUSH_METADATA, |
55 | LTTNG_CONSUMER_CLOSE_METADATA, | |
56 | LTTNG_CONSUMER_SETUP_METADATA, | |
7972aab2 | 57 | LTTNG_CONSUMER_FLUSH_CHANNEL, |
6dc3064a DG |
58 | LTTNG_CONSUMER_SNAPSHOT_CHANNEL, |
59 | LTTNG_CONSUMER_SNAPSHOT_METADATA, | |
a4baae1b | 60 | LTTNG_CONSUMER_STREAMS_SENT, |
fb83fe64 JD |
61 | LTTNG_CONSUMER_DISCARDED_EVENTS, |
62 | LTTNG_CONSUMER_LOST_PACKETS, | |
3bd1e081 MD |
63 | }; |
64 | ||
65 | /* State of each fd in consumer */ | |
66 | enum lttng_consumer_stream_state { | |
67 | LTTNG_CONSUMER_ACTIVE_STREAM, | |
68 | LTTNG_CONSUMER_PAUSE_STREAM, | |
69 | LTTNG_CONSUMER_DELETE_STREAM, | |
70 | }; | |
71 | ||
3bd1e081 MD |
72 | enum lttng_consumer_type { |
73 | LTTNG_CONSUMER_UNKNOWN = 0, | |
74 | LTTNG_CONSUMER_KERNEL, | |
7753dea8 MD |
75 | LTTNG_CONSUMER64_UST, |
76 | LTTNG_CONSUMER32_UST, | |
3bd1e081 MD |
77 | }; |
78 | ||
8994307f DG |
79 | enum consumer_endpoint_status { |
80 | CONSUMER_ENDPOINT_ACTIVE, | |
81 | CONSUMER_ENDPOINT_INACTIVE, | |
82 | }; | |
83 | ||
ffe60014 DG |
84 | enum consumer_channel_output { |
85 | CONSUMER_CHANNEL_MMAP = 0, | |
86 | CONSUMER_CHANNEL_SPLICE = 1, | |
87 | }; | |
88 | ||
89 | enum consumer_channel_type { | |
90 | CONSUMER_CHANNEL_TYPE_METADATA = 0, | |
d88aee68 | 91 | CONSUMER_CHANNEL_TYPE_DATA = 1, |
ffe60014 DG |
92 | }; |
93 | ||
51230d70 DG |
94 | extern struct lttng_consumer_global_data consumer_data; |
95 | ||
ffe60014 DG |
96 | struct stream_list { |
97 | struct cds_list_head head; | |
98 | unsigned int count; | |
99 | }; | |
100 | ||
331744e3 JD |
101 | /* Stub. */ |
102 | struct consumer_metadata_cache; | |
103 | ||
3bd1e081 | 104 | struct lttng_consumer_channel { |
ffe60014 | 105 | /* HT node used for consumer_data.channel_ht */ |
d88aee68 | 106 | struct lttng_ht_node_u64 node; |
ffe60014 | 107 | /* Indexed key. Incremented value in the consumer. */ |
d88aee68 | 108 | uint64_t key; |
ffe60014 DG |
109 | /* Number of streams referencing this channel */ |
110 | int refcount; | |
111 | /* Tracing session id on the session daemon side. */ | |
112 | uint64_t session_id; | |
1950109e JD |
113 | /* |
114 | * Session id when requesting metadata to the session daemon for | |
115 | * a session with per-PID buffers. | |
116 | */ | |
117 | uint64_t session_id_per_pid; | |
ffe60014 DG |
118 | /* Channel trace file path name. */ |
119 | char pathname[PATH_MAX]; | |
120 | /* Channel name. */ | |
121 | char name[LTTNG_SYMBOL_NAME_LEN]; | |
567eb353 | 122 | /* UID and GID of the session owning this channel. */ |
ffe60014 DG |
123 | uid_t uid; |
124 | gid_t gid; | |
da009f2c MD |
125 | /* Relayd id of the channel. -1ULL if it does not apply. */ |
126 | uint64_t relayd_id; | |
c30aaa51 | 127 | /* |
ffe60014 DG |
128 | * Number of streams NOT initialized yet. This is used in order to not |
129 | * delete this channel if streams are getting initialized. | |
c30aaa51 | 130 | */ |
ffe60014 DG |
131 | unsigned int nb_init_stream_left; |
132 | /* Output type (mmap or splice). */ | |
133 | enum consumer_channel_output output; | |
134 | /* Channel type for stream */ | |
135 | enum consumer_channel_type type; | |
c30aaa51 | 136 | |
3bd1e081 | 137 | /* For UST */ |
567eb353 | 138 | uid_t ust_app_uid; /* Application UID. */ |
ffe60014 DG |
139 | struct ustctl_consumer_channel *uchan; |
140 | unsigned char uuid[UUID_STR_LEN]; | |
141 | /* | |
142 | * Temporary stream list used to store the streams once created and waiting | |
143 | * to be sent to the session daemon by receiving the | |
144 | * LTTNG_CONSUMER_GET_CHANNEL. | |
145 | */ | |
146 | struct stream_list streams; | |
07b86b52 | 147 | |
d88aee68 DG |
148 | /* |
149 | * Set if the channel is metadata. We keep a reference to the stream | |
150 | * because we have to flush data once pushed by the session daemon. For a | |
151 | * regular channel, this is always set to NULL. | |
152 | */ | |
153 | struct lttng_consumer_stream *metadata_stream; | |
d8ef542d MD |
154 | |
155 | /* for UST */ | |
156 | int wait_fd; | |
157 | /* Node within channel thread ht */ | |
158 | struct lttng_ht_node_u64 wait_fd_node; | |
331744e3 JD |
159 | |
160 | /* Metadata cache is metadata channel */ | |
161 | struct consumer_metadata_cache *metadata_cache; | |
d3e2ba59 | 162 | /* For UST metadata periodical flush */ |
331744e3 JD |
163 | int switch_timer_enabled; |
164 | timer_t switch_timer; | |
4419b4fb MD |
165 | int switch_timer_error; |
166 | ||
d3e2ba59 JD |
167 | /* For the live mode */ |
168 | int live_timer_enabled; | |
169 | timer_t live_timer; | |
170 | int live_timer_error; | |
171 | ||
1624d5b7 JD |
172 | /* On-disk circular buffer */ |
173 | uint64_t tracefile_size; | |
174 | uint64_t tracefile_count; | |
2bba9e53 DG |
175 | /* |
176 | * Monitor or not the streams of this channel meaning this indicates if the | |
177 | * streams should be sent to the data/metadata thread or added to the no | |
178 | * monitor list of the channel. | |
179 | */ | |
180 | unsigned int monitor; | |
a9838785 MD |
181 | |
182 | /* | |
183 | * Channel lock. | |
184 | * | |
ec6ea7d0 MD |
185 | * This lock protects against concurrent update of channel. |
186 | * | |
a9838785 | 187 | * This is nested INSIDE the consumer data lock. |
ec6ea7d0 | 188 | * This is nested OUTSIDE the channel timer lock. |
a9838785 MD |
189 | * This is nested OUTSIDE the metadata cache lock. |
190 | * This is nested OUTSIDE stream lock. | |
191 | * This is nested OUTSIDE consumer_relayd_sock_pair lock. | |
192 | */ | |
193 | pthread_mutex_t lock; | |
ec6ea7d0 MD |
194 | |
195 | /* | |
196 | * Channel teardown lock. | |
197 | * | |
198 | * This lock protect against teardown of channel. It is _never_ | |
199 | * taken by the timer handler. | |
200 | * | |
201 | * This is nested INSIDE the consumer data lock. | |
202 | * This is nested INSIDE the channel lock. | |
203 | * This is nested OUTSIDE the metadata cache lock. | |
204 | * This is nested OUTSIDE stream lock. | |
205 | * This is nested OUTSIDE consumer_relayd_sock_pair lock. | |
206 | */ | |
207 | pthread_mutex_t timer_lock; | |
ecc48a90 JD |
208 | |
209 | /* Timer value in usec for live streaming. */ | |
210 | unsigned int live_timer_interval; | |
d7ba1388 | 211 | |
4628484a MD |
212 | int *stream_fds; |
213 | int nr_stream_fds; | |
3d071855 | 214 | char root_shm_path[PATH_MAX]; |
d7ba1388 | 215 | char shm_path[PATH_MAX]; |
fb83fe64 JD |
216 | /* Total number of discarded events for that channel. */ |
217 | uint64_t discarded_events; | |
218 | /* Total number of missed packets due to overwriting (overwrite). */ | |
219 | uint64_t lost_packets; | |
3bd1e081 MD |
220 | }; |
221 | ||
3bd1e081 MD |
222 | /* |
223 | * Internal representation of the streams, sessiond_key is used to identify | |
224 | * uniquely a stream. | |
225 | */ | |
226 | struct lttng_consumer_stream { | |
53632229 | 227 | /* HT node used by the data_ht and metadata_ht */ |
d88aee68 | 228 | struct lttng_ht_node_u64 node; |
d8ef542d MD |
229 | /* stream indexed per channel key node */ |
230 | struct lttng_ht_node_u64 node_channel_id; | |
53632229 | 231 | /* HT node used in consumer_data.stream_list_ht */ |
d88aee68 | 232 | struct lttng_ht_node_u64 node_session_id; |
ffe60014 DG |
233 | /* Pointer to associated channel. */ |
234 | struct lttng_consumer_channel *chan; | |
235 | ||
236 | /* Key by which the stream is indexed for 'node'. */ | |
d88aee68 | 237 | uint64_t key; |
3bd1e081 | 238 | /* |
ffe60014 DG |
239 | * File descriptor of the data output file. This can be either a file or a |
240 | * socket fd for relayd streaming. | |
3bd1e081 | 241 | */ |
3bd1e081 | 242 | int out_fd; /* output file to write the data */ |
ffe60014 DG |
243 | /* Write position in the output file descriptor */ |
244 | off_t out_fd_offset; | |
e5d1a9b3 MD |
245 | /* Amount of bytes written to the output */ |
246 | uint64_t output_written; | |
3bd1e081 | 247 | enum lttng_consumer_stream_state state; |
b5c5fc29 | 248 | int shm_fd_is_copy; |
4078b776 | 249 | int data_read; |
d056b477 | 250 | int hangup_flush_done; |
c585821b MD |
251 | |
252 | /* | |
253 | * metadata_timer_lock protects flags waiting_on_metadata and | |
254 | * missed_metadata_flush. | |
255 | */ | |
256 | pthread_mutex_t metadata_timer_lock; | |
257 | /* | |
258 | * Flag set when awaiting metadata to be pushed. Used in the | |
259 | * timer thread to skip waiting on the stream (and stream lock) to | |
260 | * ensure we can proceed to flushing metadata in live mode. | |
261 | */ | |
262 | bool waiting_on_metadata; | |
263 | /* Raised when a timer misses a metadata flush. */ | |
264 | bool missed_metadata_flush; | |
265 | ||
ffe60014 DG |
266 | enum lttng_event_output output; |
267 | /* Maximum subbuffer size. */ | |
268 | unsigned long max_sb_size; | |
269 | ||
270 | /* | |
271 | * Still used by the kernel for MMAP output. For UST, the ustctl getter is | |
272 | * used for the mmap base and offset. | |
273 | */ | |
274 | void *mmap_base; | |
275 | unsigned long mmap_len; | |
276 | ||
277 | /* For UST */ | |
278 | ||
279 | int wait_fd; | |
6df2e2c9 MD |
280 | /* UID/GID of the user owning the session to which stream belongs */ |
281 | uid_t uid; | |
282 | gid_t gid; | |
00e2e675 | 283 | /* Network sequence number. Indicating on which relayd socket it goes. */ |
d88aee68 | 284 | uint64_t net_seq_idx; |
d01178b6 DG |
285 | /* |
286 | * Indicate if this stream was successfully sent to a relayd. This is set | |
287 | * after the refcount of the relayd is incremented and is checked when the | |
288 | * stream is closed before decrementing the refcount in order to avoid an | |
289 | * unbalanced state. | |
290 | */ | |
291 | unsigned int sent_to_relayd; | |
292 | ||
00e2e675 DG |
293 | /* Identify if the stream is the metadata */ |
294 | unsigned int metadata_flag; | |
295 | /* Used when the stream is set for network streaming */ | |
296 | uint64_t relayd_stream_id; | |
3604f373 DG |
297 | /* |
298 | * When sending a stream packet to a relayd, this number is used to track | |
299 | * the packet sent by the consumer and seen by the relayd. When sending the | |
300 | * data header to the relayd, this number is sent and if the transmission | |
301 | * was successful, it is incremented. | |
302 | * | |
303 | * Even if the full data is not fully transmitted it won't matter since | |
304 | * only two possible error can happen after that where either the relayd | |
305 | * died or a read error is detected on the stream making this value useless | |
306 | * after that. | |
307 | * | |
308 | * This value SHOULD be read/updated atomically or with the lock acquired. | |
309 | */ | |
173af62f | 310 | uint64_t next_net_seq_num; |
63281d5d | 311 | /* |
74251bb8 DG |
312 | * Lock to use the stream FDs since they are used between threads. |
313 | * | |
314 | * This is nested INSIDE the consumer_data lock. | |
73811ecc | 315 | * This is nested INSIDE the metadata cache lock. |
a9838785 | 316 | * This is nested INSIDE the channel lock. |
ec6ea7d0 | 317 | * This is nested INSIDE the channel timer lock. |
74251bb8 | 318 | * This is nested OUTSIDE consumer_relayd_sock_pair lock. |
63281d5d | 319 | */ |
53632229 DG |
320 | pthread_mutex_t lock; |
321 | /* Tracing session id */ | |
322 | uint64_t session_id; | |
8994307f DG |
323 | /* |
324 | * Indicates if the stream end point is still active or not (network | |
325 | * streaming or local file system). The thread "owning" the stream is | |
326 | * handling this status and can be notified of a state change through the | |
327 | * consumer data appropriate pipe. | |
328 | */ | |
329 | enum consumer_endpoint_status endpoint_status; | |
ffe60014 DG |
330 | /* Stream name. Format is: <channel_name>_<cpu_number> */ |
331 | char name[LTTNG_SYMBOL_NAME_LEN]; | |
332 | /* Internal state of libustctl. */ | |
333 | struct ustctl_consumer_stream *ustream; | |
334 | struct cds_list_head send_node; | |
1624d5b7 JD |
335 | /* On-disk circular buffer */ |
336 | uint64_t tracefile_size_current; | |
337 | uint64_t tracefile_count_current; | |
4891ece8 DG |
338 | /* |
339 | * Monitor or not the streams of this channel meaning this indicates if the | |
340 | * streams should be sent to the data/metadata thread or added to the no | |
341 | * monitor list of the channel. | |
342 | */ | |
343 | unsigned int monitor; | |
344 | /* | |
345 | * Indicate if the stream is globally visible meaning that it has been | |
346 | * added to the multiple hash tables. If *not* set, NO lock should be | |
347 | * acquired in the destroy path. | |
348 | */ | |
349 | unsigned int globally_visible; | |
feb78e88 MD |
350 | /* |
351 | * Pipe to wake up the metadata poll thread when the UST metadata | |
352 | * cache is updated. | |
353 | */ | |
354 | int ust_metadata_poll_pipe[2]; | |
355 | /* | |
356 | * How much metadata was read from the metadata cache and sent | |
357 | * to the channel. | |
358 | */ | |
359 | uint64_t ust_metadata_pushed; | |
fb83fe64 JD |
360 | /* |
361 | * Copy of the last discarded event value to detect the overflow of | |
362 | * the counter. | |
363 | */ | |
364 | uint64_t last_discarded_events; | |
365 | /* Copy of the sequence number of the last packet extracted. */ | |
366 | uint64_t last_sequence_number; | |
309167d2 JD |
367 | /* |
368 | * FD of the index file for this stream. | |
369 | */ | |
370 | int index_fd; | |
94d49140 | 371 | |
a2361a61 JD |
372 | /* |
373 | * Local pipe to extract data when using splice. | |
374 | */ | |
375 | int splice_pipe[2]; | |
376 | ||
94d49140 JD |
377 | /* |
378 | * Rendez-vous point between data and metadata stream in live mode. | |
379 | */ | |
380 | pthread_cond_t metadata_rdv; | |
381 | pthread_mutex_t metadata_rdv_lock; | |
02b3d176 DG |
382 | |
383 | /* Indicate if the stream still has some data to be read. */ | |
384 | unsigned int has_data:1; | |
00e2e675 DG |
385 | }; |
386 | ||
387 | /* | |
388 | * Internal representation of a relayd socket pair. | |
389 | */ | |
390 | struct consumer_relayd_sock_pair { | |
391 | /* Network sequence number. */ | |
da009f2c | 392 | uint64_t net_seq_idx; |
00e2e675 DG |
393 | /* Number of stream associated with this relayd */ |
394 | unsigned int refcount; | |
173af62f DG |
395 | |
396 | /* | |
397 | * This flag indicates whether or not we should destroy this object. The | |
398 | * destruction should ONLY occurs when this flag is set and the refcount is | |
399 | * set to zero. | |
400 | */ | |
401 | unsigned int destroy_flag; | |
402 | ||
51d7db73 DG |
403 | /* |
404 | * Mutex protecting the control socket to avoid out of order packets | |
405 | * between threads sending data to the relayd. Since metadata data is sent | |
406 | * over that socket, at least two sendmsg() are needed (header + data) | |
407 | * creating a race for packets to overlap between threads using it. | |
74251bb8 DG |
408 | * |
409 | * This is nested INSIDE the consumer_data lock. | |
410 | * This is nested INSIDE the stream lock. | |
51d7db73 | 411 | */ |
00e2e675 | 412 | pthread_mutex_t ctrl_sock_mutex; |
51d7db73 DG |
413 | |
414 | /* Control socket. Command and metadata are passed over it */ | |
6151a90f | 415 | struct lttcomm_relayd_sock control_sock; |
51d7db73 DG |
416 | |
417 | /* | |
418 | * We don't need a mutex at this point since we only splice or write single | |
419 | * large chunk of data with a header appended at the begining. Moreover, | |
420 | * this socket is for now only used in a single thread. | |
421 | */ | |
6151a90f | 422 | struct lttcomm_relayd_sock data_sock; |
d88aee68 | 423 | struct lttng_ht_node_u64 node; |
c5b6f4f0 | 424 | |
f7079f67 DG |
425 | /* Session id on both sides for the sockets. */ |
426 | uint64_t relayd_session_id; | |
427 | uint64_t sessiond_session_id; | |
3bd1e081 MD |
428 | }; |
429 | ||
430 | /* | |
431 | * UST consumer local data to the program. One or more instance per | |
432 | * process. | |
433 | */ | |
434 | struct lttng_consumer_local_data { | |
4078b776 MD |
435 | /* |
436 | * Function to call when data is available on a buffer. | |
437 | * Returns the number of bytes read, or negative error value. | |
438 | */ | |
439 | ssize_t (*on_buffer_ready)(struct lttng_consumer_stream *stream, | |
d41f73b7 | 440 | struct lttng_consumer_local_data *ctx); |
3bd1e081 MD |
441 | /* |
442 | * function to call when we receive a new channel, it receives a | |
443 | * newly allocated channel, depending on the return code of this | |
444 | * function, the new channel will be handled by the application | |
445 | * or the library. | |
446 | * | |
447 | * Returns: | |
448 | * > 0 (success, FD is kept by application) | |
449 | * == 0 (success, FD is left to library) | |
450 | * < 0 (error) | |
451 | */ | |
452 | int (*on_recv_channel)(struct lttng_consumer_channel *channel); | |
453 | /* | |
454 | * function to call when we receive a new stream, it receives a | |
455 | * newly allocated stream, depending on the return code of this | |
456 | * function, the new stream will be handled by the application | |
457 | * or the library. | |
458 | * | |
459 | * Returns: | |
460 | * > 0 (success, FD is kept by application) | |
461 | * == 0 (success, FD is left to library) | |
462 | * < 0 (error) | |
463 | */ | |
464 | int (*on_recv_stream)(struct lttng_consumer_stream *stream); | |
465 | /* | |
466 | * function to call when a stream is getting updated by the session | |
467 | * daemon, this function receives the sessiond key and the new | |
468 | * state, depending on the return code of this function the | |
469 | * update of state for the stream is handled by the application | |
470 | * or the library. | |
471 | * | |
472 | * Returns: | |
473 | * > 0 (success, FD is kept by application) | |
474 | * == 0 (success, FD is left to library) | |
475 | * < 0 (error) | |
476 | */ | |
30319bcb | 477 | int (*on_update_stream)(uint64_t sessiond_key, uint32_t state); |
331744e3 | 478 | enum lttng_consumer_type type; |
3bd1e081 MD |
479 | /* socket to communicate errors with sessiond */ |
480 | int consumer_error_socket; | |
75d83e50 | 481 | /* socket to ask metadata to sessiond. */ |
331744e3 | 482 | int consumer_metadata_socket; |
ace17efa MD |
483 | /* |
484 | * Protect consumer_metadata_socket. | |
485 | * | |
486 | * This is nested OUTSIDE the metadata cache lock. | |
487 | */ | |
75d83e50 | 488 | pthread_mutex_t metadata_socket_lock; |
3bd1e081 MD |
489 | /* socket to exchange commands with sessiond */ |
490 | char *consumer_command_sock_path; | |
491 | /* communication with splice */ | |
d8ef542d | 492 | int consumer_channel_pipe[2]; |
50f8ae69 | 493 | /* Data stream poll thread pipe. To transfer data stream to the thread */ |
acdb9057 | 494 | struct lttng_pipe *consumer_data_pipe; |
02b3d176 DG |
495 | |
496 | /* | |
497 | * Data thread use that pipe to catch wakeup from read subbuffer that | |
498 | * detects that there is still data to be read for the stream encountered. | |
499 | * Before doing so, the stream is flagged to indicate that there is still | |
500 | * data to be read. | |
501 | * | |
502 | * Both pipes (read/write) are owned and used inside the data thread. | |
503 | */ | |
504 | struct lttng_pipe *consumer_wakeup_pipe; | |
505 | /* Indicate if the wakeup thread has been notified. */ | |
506 | unsigned int has_wakeup:1; | |
507 | ||
3bd1e081 MD |
508 | /* to let the signal handler wake up the fd receiver thread */ |
509 | int consumer_should_quit[2]; | |
fb3a43a9 | 510 | /* Metadata poll thread pipe. Transfer metadata stream to it */ |
13886d2d | 511 | struct lttng_pipe *consumer_metadata_pipe; |
3bd1e081 MD |
512 | }; |
513 | ||
514 | /* | |
515 | * Library-level data. One instance per process. | |
516 | */ | |
517 | struct lttng_consumer_global_data { | |
518 | /* | |
e4421fec DG |
519 | * At this time, this lock is used to ensure coherence between the count |
520 | * and number of element in the hash table. It's also a protection for | |
6065ceec DG |
521 | * concurrent read/write between threads. |
522 | * | |
74251bb8 DG |
523 | * This is nested OUTSIDE the stream lock. |
524 | * This is nested OUTSIDE the consumer_relayd_sock_pair lock. | |
3bd1e081 MD |
525 | */ |
526 | pthread_mutex_t lock; | |
e4421fec | 527 | |
3bd1e081 | 528 | /* |
3cc2f24a DG |
529 | * Number of streams in the data stream hash table declared outside. |
530 | * Protected by consumer_data.lock. | |
3bd1e081 MD |
531 | */ |
532 | int stream_count; | |
3cc2f24a DG |
533 | |
534 | /* Channel hash table protected by consumer_data.lock. */ | |
e4421fec | 535 | struct lttng_ht *channel_ht; |
3bd1e081 MD |
536 | /* |
537 | * Flag specifying if the local array of FDs needs update in the | |
538 | * poll function. Protected by consumer_data.lock. | |
539 | */ | |
540 | unsigned int need_update; | |
541 | enum lttng_consumer_type type; | |
00e2e675 DG |
542 | |
543 | /* | |
544 | * Relayd socket(s) hashtable indexed by network sequence number. Each | |
545 | * stream has an index which associate the right relayd socket to use. | |
546 | */ | |
547 | struct lttng_ht *relayd_ht; | |
53632229 DG |
548 | |
549 | /* | |
550 | * This hash table contains all streams (metadata and data) indexed by | |
551 | * session id. In other words, the ht is indexed by session id and each | |
552 | * bucket contains the list of associated streams. | |
553 | * | |
554 | * This HT uses the "node_session_id" of the consumer stream. | |
555 | */ | |
556 | struct lttng_ht *stream_list_ht; | |
d8ef542d MD |
557 | |
558 | /* | |
559 | * This HT uses the "node_channel_id" of the consumer stream. | |
560 | */ | |
561 | struct lttng_ht *stream_per_chan_id_ht; | |
3bd1e081 MD |
562 | }; |
563 | ||
e4421fec DG |
564 | /* |
565 | * Init consumer data structures. | |
566 | */ | |
282dadbc | 567 | int lttng_consumer_init(void); |
e4421fec | 568 | |
3bd1e081 MD |
569 | /* |
570 | * Set the error socket for communication with a session daemon. | |
571 | */ | |
ffe60014 DG |
572 | void lttng_consumer_set_error_sock(struct lttng_consumer_local_data *ctx, |
573 | int sock); | |
3bd1e081 MD |
574 | |
575 | /* | |
576 | * Set the command socket path for communication with a session daemon. | |
577 | */ | |
ffe60014 | 578 | void lttng_consumer_set_command_sock_path( |
3bd1e081 MD |
579 | struct lttng_consumer_local_data *ctx, char *sock); |
580 | ||
581 | /* | |
582 | * Send return code to session daemon. | |
583 | * | |
584 | * Returns the return code of sendmsg : the number of bytes transmitted or -1 | |
585 | * on error. | |
586 | */ | |
ffe60014 | 587 | int lttng_consumer_send_error(struct lttng_consumer_local_data *ctx, int cmd); |
3bd1e081 MD |
588 | |
589 | /* | |
590 | * Called from signal handler to ensure a clean exit. | |
591 | */ | |
ffe60014 | 592 | void lttng_consumer_should_exit(struct lttng_consumer_local_data *ctx); |
3bd1e081 MD |
593 | |
594 | /* | |
595 | * Cleanup the daemon's socket on exit. | |
596 | */ | |
ffe60014 | 597 | void lttng_consumer_cleanup(void); |
3bd1e081 MD |
598 | |
599 | /* | |
600 | * Flush pending writes to trace output disk file. | |
601 | */ | |
ffe60014 DG |
602 | void lttng_consumer_sync_trace_file(struct lttng_consumer_stream *stream, |
603 | off_t orig_offset); | |
3bd1e081 MD |
604 | |
605 | /* | |
606 | * Poll on the should_quit pipe and the command socket return -1 on error and | |
607 | * should exit, 0 if data is available on the command socket | |
608 | */ | |
ffe60014 | 609 | int lttng_consumer_poll_socket(struct pollfd *kconsumer_sockpoll); |
3bd1e081 | 610 | |
d88aee68 DG |
611 | struct lttng_consumer_stream *consumer_allocate_stream(uint64_t channel_key, |
612 | uint64_t stream_key, | |
3bd1e081 | 613 | enum lttng_consumer_stream_state state, |
ffe60014 | 614 | const char *channel_name, |
6df2e2c9 | 615 | uid_t uid, |
00e2e675 | 616 | gid_t gid, |
57a269f2 | 617 | uint64_t relayd_id, |
53632229 | 618 | uint64_t session_id, |
ffe60014 DG |
619 | int cpu, |
620 | int *alloc_ret, | |
4891ece8 DG |
621 | enum consumer_channel_type type, |
622 | unsigned int monitor); | |
d88aee68 | 623 | struct lttng_consumer_channel *consumer_allocate_channel(uint64_t key, |
ffe60014 DG |
624 | uint64_t session_id, |
625 | const char *pathname, | |
626 | const char *name, | |
627 | uid_t uid, | |
628 | gid_t gid, | |
57a269f2 | 629 | uint64_t relayd_id, |
1624d5b7 JD |
630 | enum lttng_event_output output, |
631 | uint64_t tracefile_size, | |
2bba9e53 | 632 | uint64_t tracefile_count, |
1950109e | 633 | uint64_t session_id_per_pid, |
ecc48a90 | 634 | unsigned int monitor, |
d7ba1388 | 635 | unsigned int live_timer_interval, |
3d071855 | 636 | const char *root_shm_path, |
d7ba1388 | 637 | const char *shm_path); |
ffe60014 | 638 | void consumer_del_stream(struct lttng_consumer_stream *stream, |
e316aad5 | 639 | struct lttng_ht *ht); |
ffe60014 | 640 | void consumer_del_metadata_stream(struct lttng_consumer_stream *stream, |
e316aad5 | 641 | struct lttng_ht *ht); |
d8ef542d MD |
642 | int consumer_add_channel(struct lttng_consumer_channel *channel, |
643 | struct lttng_consumer_local_data *ctx); | |
ffe60014 | 644 | void consumer_del_channel(struct lttng_consumer_channel *channel); |
3bd1e081 | 645 | |
00e2e675 | 646 | /* lttng-relayd consumer command */ |
d88aee68 | 647 | struct consumer_relayd_sock_pair *consumer_find_relayd(uint64_t key); |
10a50311 | 648 | int consumer_send_relayd_stream(struct lttng_consumer_stream *stream, char *path); |
a4baae1b | 649 | int consumer_send_relayd_streams_sent(uint64_t net_seq_idx); |
10a50311 | 650 | void close_relayd_stream(struct lttng_consumer_stream *stream); |
d88aee68 | 651 | struct lttng_consumer_channel *consumer_find_channel(uint64_t key); |
00e2e675 DG |
652 | int consumer_handle_stream_before_relayd(struct lttng_consumer_stream *stream, |
653 | size_t data_size); | |
c869f647 | 654 | void consumer_steal_stream_key(int key, struct lttng_ht *ht); |
00e2e675 | 655 | |
ffe60014 | 656 | struct lttng_consumer_local_data *lttng_consumer_create( |
3bd1e081 | 657 | enum lttng_consumer_type type, |
4078b776 | 658 | ssize_t (*buffer_ready)(struct lttng_consumer_stream *stream, |
d41f73b7 | 659 | struct lttng_consumer_local_data *ctx), |
3bd1e081 MD |
660 | int (*recv_channel)(struct lttng_consumer_channel *channel), |
661 | int (*recv_stream)(struct lttng_consumer_stream *stream), | |
30319bcb | 662 | int (*update_stream)(uint64_t sessiond_key, uint32_t state)); |
ffe60014 DG |
663 | void lttng_consumer_destroy(struct lttng_consumer_local_data *ctx); |
664 | ssize_t lttng_consumer_on_read_subbuffer_mmap( | |
3bd1e081 | 665 | struct lttng_consumer_local_data *ctx, |
1d4dfdef | 666 | struct lttng_consumer_stream *stream, unsigned long len, |
309167d2 | 667 | unsigned long padding, |
50adc264 | 668 | struct ctf_packet_index *index); |
ffe60014 | 669 | ssize_t lttng_consumer_on_read_subbuffer_splice( |
3bd1e081 | 670 | struct lttng_consumer_local_data *ctx, |
1d4dfdef | 671 | struct lttng_consumer_stream *stream, unsigned long len, |
309167d2 | 672 | unsigned long padding, |
50adc264 | 673 | struct ctf_packet_index *index); |
ffe60014 DG |
674 | int lttng_consumer_take_snapshot(struct lttng_consumer_stream *stream); |
675 | int lttng_consumer_get_produced_snapshot(struct lttng_consumer_stream *stream, | |
3bd1e081 | 676 | unsigned long *pos); |
6d574024 DG |
677 | int lttng_ustconsumer_get_wakeup_fd(struct lttng_consumer_stream *stream); |
678 | int lttng_ustconsumer_close_wakeup_fd(struct lttng_consumer_stream *stream); | |
ffe60014 DG |
679 | void *consumer_thread_metadata_poll(void *data); |
680 | void *consumer_thread_data_poll(void *data); | |
681 | void *consumer_thread_sessiond_poll(void *data); | |
d8ef542d | 682 | void *consumer_thread_channel_poll(void *data); |
ffe60014 | 683 | int lttng_consumer_recv_cmd(struct lttng_consumer_local_data *ctx, |
3bd1e081 MD |
684 | int sock, struct pollfd *consumer_sockpoll); |
685 | ||
4078b776 | 686 | ssize_t lttng_consumer_read_subbuffer(struct lttng_consumer_stream *stream, |
d41f73b7 MD |
687 | struct lttng_consumer_local_data *ctx); |
688 | int lttng_consumer_on_recv_stream(struct lttng_consumer_stream *stream); | |
da009f2c | 689 | int consumer_add_relayd_socket(uint64_t net_seq_idx, int sock_type, |
7735ef9e | 690 | struct lttng_consumer_local_data *ctx, int sock, |
6151a90f | 691 | struct pollfd *consumer_sockpoll, struct lttcomm_relayd_sock *relayd_sock, |
d3e2ba59 | 692 | uint64_t sessiond_id, uint64_t relayd_session_id); |
a6ba4fe1 DG |
693 | void consumer_flag_relayd_for_destroy( |
694 | struct consumer_relayd_sock_pair *relayd); | |
6d805429 | 695 | int consumer_data_pending(uint64_t id); |
f50f23d9 | 696 | int consumer_send_status_msg(int sock, int ret_code); |
ffe60014 DG |
697 | int consumer_send_status_channel(int sock, |
698 | struct lttng_consumer_channel *channel); | |
a0cbdd2e MD |
699 | void notify_thread_del_channel(struct lttng_consumer_local_data *ctx, |
700 | uint64_t key); | |
51230d70 | 701 | void consumer_destroy_relayd(struct consumer_relayd_sock_pair *relayd); |
d07ceecd MD |
702 | unsigned long consumer_get_consume_start_pos(unsigned long consumed_pos, |
703 | unsigned long produced_pos, uint64_t nb_packets_per_stream, | |
704 | uint64_t max_sb_size); | |
5ab66908 MD |
705 | int consumer_add_data_stream(struct lttng_consumer_stream *stream); |
706 | void consumer_del_stream_for_data(struct lttng_consumer_stream *stream); | |
707 | int consumer_add_metadata_stream(struct lttng_consumer_stream *stream); | |
708 | void consumer_del_stream_for_metadata(struct lttng_consumer_stream *stream); | |
309167d2 | 709 | int consumer_create_index_file(struct lttng_consumer_stream *stream); |
d41f73b7 | 710 | |
f02e1e8a | 711 | #endif /* LIB_CONSUMER_H */ |