Commit | Line | Data |
---|---|---|
51230d70 | 1 | /* |
21cf9b6b | 2 | * Copyright (C) 2011 EfficiOS Inc. |
ab5be9fa MJ |
3 | * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
4 | * Copyright (C) 2013 David Goulet <dgoulet@efficios.com> | |
51230d70 | 5 | * |
ab5be9fa | 6 | * SPDX-License-Identifier: GPL-2.0-only |
51230d70 | 7 | * |
51230d70 DG |
8 | */ |
9 | ||
6c1c0768 | 10 | #define _LGPL_SOURCE |
10a50311 | 11 | #include <inttypes.h> |
51230d70 DG |
12 | #include <sys/mman.h> |
13 | #include <unistd.h> | |
14 | ||
15 | #include <common/common.h> | |
947bd097 JR |
16 | #include <common/consumer/consumer-timer.h> |
17 | #include <common/consumer/consumer-timer.h> | |
18 | #include <common/consumer/consumer.h> | |
19 | #include <common/consumer/consumer.h> | |
20 | #include <common/consumer/metadata-bucket.h> | |
21 | #include <common/consumer/metadata-bucket.h> | |
1c20f0e2 | 22 | #include <common/index/index.h> |
94d49140 | 23 | #include <common/kernel-consumer/kernel-consumer.h> |
947bd097 JR |
24 | #include <common/kernel-ctl/kernel-ctl.h> |
25 | #include <common/macros.h> | |
51230d70 DG |
26 | #include <common/relayd/relayd.h> |
27 | #include <common/ust-consumer/ust-consumer.h> | |
a2361a61 | 28 | #include <common/utils.h> |
51230d70 DG |
29 | |
30 | #include "consumer-stream.h" | |
31 | ||
32 | /* | |
33 | * RCU call to free stream. MUST only be used with call_rcu(). | |
34 | */ | |
35 | static void free_stream_rcu(struct rcu_head *head) | |
36 | { | |
37 | struct lttng_ht_node_u64 *node = | |
38 | caa_container_of(head, struct lttng_ht_node_u64, head); | |
39 | struct lttng_consumer_stream *stream = | |
40 | caa_container_of(node, struct lttng_consumer_stream, node); | |
41 | ||
42 | pthread_mutex_destroy(&stream->lock); | |
43 | free(stream); | |
44 | } | |
45 | ||
6f9449c2 JG |
46 | static void consumer_stream_data_lock_all(struct lttng_consumer_stream *stream) |
47 | { | |
48 | pthread_mutex_lock(&stream->chan->lock); | |
49 | pthread_mutex_lock(&stream->lock); | |
50 | } | |
51 | ||
52 | static void consumer_stream_data_unlock_all(struct lttng_consumer_stream *stream) | |
53 | { | |
54 | pthread_mutex_unlock(&stream->lock); | |
55 | pthread_mutex_unlock(&stream->chan->lock); | |
56 | } | |
57 | ||
947bd097 JR |
58 | static void consumer_stream_data_assert_locked_all(struct lttng_consumer_stream *stream) |
59 | { | |
60 | ASSERT_LOCKED(stream->lock); | |
61 | ASSERT_LOCKED(stream->chan->lock); | |
62 | } | |
63 | ||
6f9449c2 JG |
64 | static void consumer_stream_metadata_lock_all(struct lttng_consumer_stream *stream) |
65 | { | |
66 | consumer_stream_data_lock_all(stream); | |
67 | pthread_mutex_lock(&stream->metadata_rdv_lock); | |
68 | } | |
69 | ||
70 | static void consumer_stream_metadata_unlock_all(struct lttng_consumer_stream *stream) | |
71 | { | |
72 | pthread_mutex_unlock(&stream->metadata_rdv_lock); | |
73 | consumer_stream_data_unlock_all(stream); | |
74 | } | |
75 | ||
947bd097 JR |
76 | static void consumer_stream_metadata_assert_locked_all(struct lttng_consumer_stream *stream) |
77 | { | |
78 | ASSERT_LOCKED(stream->metadata_rdv_lock); | |
79 | consumer_stream_data_assert_locked_all(stream); | |
80 | } | |
81 | ||
6f9449c2 JG |
82 | /* Only used for data streams. */ |
83 | static int consumer_stream_update_stats(struct lttng_consumer_stream *stream, | |
84 | const struct stream_subbuffer *subbuf) | |
85 | { | |
86 | int ret = 0; | |
87 | uint64_t sequence_number; | |
d9b063d7 | 88 | const uint64_t discarded_events = subbuf->info.data.events_discarded; |
6f9449c2 JG |
89 | |
90 | if (!subbuf->info.data.sequence_number.is_set) { | |
91 | /* Command not supported by the tracer. */ | |
92 | sequence_number = -1ULL; | |
93 | stream->sequence_number_unavailable = true; | |
94 | } else { | |
95 | sequence_number = subbuf->info.data.sequence_number.value; | |
96 | } | |
97 | ||
98 | /* | |
99 | * Start the sequence when we extract the first packet in case we don't | |
100 | * start at 0 (for example if a consumer is not connected to the | |
101 | * session immediately after the beginning). | |
102 | */ | |
103 | if (stream->last_sequence_number == -1ULL) { | |
104 | stream->last_sequence_number = sequence_number; | |
105 | } else if (sequence_number > stream->last_sequence_number) { | |
106 | stream->chan->lost_packets += sequence_number - | |
107 | stream->last_sequence_number - 1; | |
108 | } else { | |
109 | /* seq <= last_sequence_number */ | |
110 | ERR("Sequence number inconsistent : prev = %" PRIu64 | |
111 | ", current = %" PRIu64, | |
112 | stream->last_sequence_number, sequence_number); | |
113 | ret = -1; | |
114 | goto end; | |
115 | } | |
116 | stream->last_sequence_number = sequence_number; | |
117 | ||
118 | if (discarded_events < stream->last_discarded_events) { | |
119 | /* | |
120 | * Overflow has occurred. We assume only one wrap-around | |
121 | * has occurred. | |
122 | */ | |
123 | stream->chan->discarded_events += | |
124 | (1ULL << (CAA_BITS_PER_LONG - 1)) - | |
125 | stream->last_discarded_events + | |
126 | discarded_events; | |
127 | } else { | |
128 | stream->chan->discarded_events += discarded_events - | |
129 | stream->last_discarded_events; | |
130 | } | |
131 | stream->last_discarded_events = discarded_events; | |
132 | ret = 0; | |
133 | ||
134 | end: | |
135 | return ret; | |
136 | } | |
137 | ||
138 | static | |
139 | void ctf_packet_index_populate(struct ctf_packet_index *index, | |
140 | off_t offset, const struct stream_subbuffer *subbuffer) | |
141 | { | |
142 | *index = (typeof(*index)){ | |
143 | .offset = htobe64(offset), | |
144 | .packet_size = htobe64(subbuffer->info.data.packet_size), | |
145 | .content_size = htobe64(subbuffer->info.data.content_size), | |
146 | .timestamp_begin = htobe64( | |
147 | subbuffer->info.data.timestamp_begin), | |
148 | .timestamp_end = htobe64( | |
149 | subbuffer->info.data.timestamp_end), | |
150 | .events_discarded = htobe64( | |
151 | subbuffer->info.data.events_discarded), | |
152 | .stream_id = htobe64(subbuffer->info.data.stream_id), | |
153 | .stream_instance_id = htobe64( | |
154 | subbuffer->info.data.stream_instance_id.is_set ? | |
155 | subbuffer->info.data.stream_instance_id.value : -1ULL), | |
156 | .packet_seq_num = htobe64( | |
157 | subbuffer->info.data.sequence_number.is_set ? | |
158 | subbuffer->info.data.sequence_number.value : -1ULL), | |
159 | }; | |
160 | } | |
161 | ||
162 | static ssize_t consumer_stream_consume_mmap( | |
163 | struct lttng_consumer_local_data *ctx, | |
164 | struct lttng_consumer_stream *stream, | |
165 | const struct stream_subbuffer *subbuffer) | |
166 | { | |
167 | const unsigned long padding_size = | |
168 | subbuffer->info.data.padded_subbuf_size - | |
169 | subbuffer->info.data.subbuf_size; | |
514775d9 | 170 | const ssize_t written_bytes = lttng_consumer_on_read_subbuffer_mmap( |
f5ba75b4 | 171 | stream, &subbuffer->buffer.buffer, padding_size); |
514775d9 FD |
172 | |
173 | if (stream->net_seq_idx == -1ULL) { | |
174 | /* | |
175 | * When writing on disk, check that only the subbuffer (no | |
176 | * padding) was written to disk. | |
177 | */ | |
178 | if (written_bytes != subbuffer->info.data.padded_subbuf_size) { | |
179 | DBG("Failed to write the entire padded subbuffer on disk (written_bytes: %zd, padded subbuffer size %lu)", | |
180 | written_bytes, | |
181 | subbuffer->info.data.padded_subbuf_size); | |
182 | } | |
183 | } else { | |
184 | /* | |
185 | * When streaming over the network, check that the entire | |
186 | * subbuffer including padding was successfully written. | |
187 | */ | |
188 | if (written_bytes != subbuffer->info.data.subbuf_size) { | |
189 | DBG("Failed to write only the subbuffer over the network (written_bytes: %zd, subbuffer size %lu)", | |
190 | written_bytes, | |
191 | subbuffer->info.data.subbuf_size); | |
192 | } | |
193 | } | |
194 | ||
195 | /* | |
196 | * If `lttng_consumer_on_read_subbuffer_mmap()` returned an error, pass | |
197 | * it along to the caller, else return zero. | |
198 | */ | |
199 | if (written_bytes < 0) { | |
200 | ERR("Error reading mmap subbuffer: %zd", written_bytes); | |
201 | } | |
202 | ||
203 | return written_bytes; | |
6f9449c2 JG |
204 | } |
205 | ||
206 | static ssize_t consumer_stream_consume_splice( | |
207 | struct lttng_consumer_local_data *ctx, | |
208 | struct lttng_consumer_stream *stream, | |
209 | const struct stream_subbuffer *subbuffer) | |
210 | { | |
514775d9 FD |
211 | const ssize_t written_bytes = lttng_consumer_on_read_subbuffer_splice( |
212 | ctx, stream, subbuffer->info.data.padded_subbuf_size, 0); | |
213 | ||
214 | if (written_bytes != subbuffer->info.data.padded_subbuf_size) { | |
215 | DBG("Failed to write the entire padded subbuffer (written_bytes: %zd, padded subbuffer size %lu)", | |
216 | written_bytes, | |
217 | subbuffer->info.data.padded_subbuf_size); | |
218 | } | |
219 | ||
220 | /* | |
221 | * If `lttng_consumer_on_read_subbuffer_splice()` returned an error, | |
222 | * pass it along to the caller, else return zero. | |
223 | */ | |
224 | if (written_bytes < 0) { | |
225 | ERR("Error reading splice subbuffer: %zd", written_bytes); | |
226 | } | |
227 | ||
228 | return written_bytes; | |
6f9449c2 JG |
229 | } |
230 | ||
231 | static int consumer_stream_send_index( | |
232 | struct lttng_consumer_stream *stream, | |
233 | const struct stream_subbuffer *subbuffer, | |
234 | struct lttng_consumer_local_data *ctx) | |
235 | { | |
236 | off_t packet_offset = 0; | |
237 | struct ctf_packet_index index = {}; | |
238 | ||
239 | /* | |
240 | * This is called after consuming the sub-buffer; substract the | |
241 | * effect this sub-buffer from the offset. | |
242 | */ | |
243 | if (stream->net_seq_idx == (uint64_t) -1ULL) { | |
244 | packet_offset = stream->out_fd_offset - | |
245 | subbuffer->info.data.padded_subbuf_size; | |
246 | } | |
247 | ||
248 | ctf_packet_index_populate(&index, packet_offset, subbuffer); | |
249 | return consumer_stream_write_index(stream, &index); | |
250 | } | |
251 | ||
252 | /* | |
253 | * Actually do the metadata sync using the given metadata stream. | |
254 | * | |
255 | * Return 0 on success else a negative value. ENODATA can be returned also | |
256 | * indicating that there is no metadata available for that stream. | |
257 | */ | |
258 | static int do_sync_metadata(struct lttng_consumer_stream *metadata, | |
259 | struct lttng_consumer_local_data *ctx) | |
260 | { | |
261 | int ret; | |
577eea73 | 262 | enum sync_metadata_status status; |
6f9449c2 | 263 | |
a0377dfe FD |
264 | LTTNG_ASSERT(metadata); |
265 | LTTNG_ASSERT(metadata->metadata_flag); | |
266 | LTTNG_ASSERT(ctx); | |
6f9449c2 JG |
267 | |
268 | /* | |
269 | * In UST, since we have to write the metadata from the cache packet | |
270 | * by packet, we might need to start this procedure multiple times | |
271 | * until all the metadata from the cache has been extracted. | |
272 | */ | |
273 | do { | |
274 | /* | |
275 | * Steps : | |
276 | * - Lock the metadata stream | |
277 | * - Check if metadata stream node was deleted before locking. | |
278 | * - if yes, release and return success | |
279 | * - Check if new metadata is ready (flush + snapshot pos) | |
280 | * - If nothing : release and return. | |
281 | * - Lock the metadata_rdv_lock | |
282 | * - Unlock the metadata stream | |
283 | * - cond_wait on metadata_rdv to wait the wakeup from the | |
284 | * metadata thread | |
285 | * - Unlock the metadata_rdv_lock | |
286 | */ | |
287 | pthread_mutex_lock(&metadata->lock); | |
288 | ||
289 | /* | |
290 | * There is a possibility that we were able to acquire a reference on the | |
291 | * stream from the RCU hash table but between then and now, the node might | |
292 | * have been deleted just before the lock is acquired. Thus, after locking, | |
293 | * we make sure the metadata node has not been deleted which means that the | |
294 | * buffers are closed. | |
295 | * | |
296 | * In that case, there is no need to sync the metadata hence returning a | |
297 | * success return code. | |
298 | */ | |
299 | ret = cds_lfht_is_node_deleted(&metadata->node.node); | |
300 | if (ret) { | |
301 | ret = 0; | |
302 | goto end_unlock_mutex; | |
303 | } | |
304 | ||
305 | switch (ctx->type) { | |
306 | case LTTNG_CONSUMER_KERNEL: | |
307 | /* | |
308 | * Empty the metadata cache and flush the current stream. | |
309 | */ | |
577eea73 | 310 | status = lttng_kconsumer_sync_metadata(metadata); |
6f9449c2 JG |
311 | break; |
312 | case LTTNG_CONSUMER32_UST: | |
313 | case LTTNG_CONSUMER64_UST: | |
314 | /* | |
315 | * Ask the sessiond if we have new metadata waiting and update the | |
316 | * consumer metadata cache. | |
317 | */ | |
577eea73 | 318 | status = lttng_ustconsumer_sync_metadata(ctx, metadata); |
6f9449c2 JG |
319 | break; |
320 | default: | |
577eea73 | 321 | abort(); |
6f9449c2 | 322 | } |
577eea73 JG |
323 | |
324 | switch (status) { | |
325 | case SYNC_METADATA_STATUS_NEW_DATA: | |
326 | break; | |
327 | case SYNC_METADATA_STATUS_NO_DATA: | |
328 | ret = 0; | |
6f9449c2 | 329 | goto end_unlock_mutex; |
577eea73 JG |
330 | case SYNC_METADATA_STATUS_ERROR: |
331 | ret = -1; | |
332 | goto end_unlock_mutex; | |
333 | default: | |
334 | abort(); | |
6f9449c2 JG |
335 | } |
336 | ||
337 | /* | |
338 | * At this point, new metadata have been flushed, so we wait on the | |
339 | * rendez-vous point for the metadata thread to wake us up when it | |
340 | * finishes consuming the metadata and continue execution. | |
341 | */ | |
342 | ||
343 | pthread_mutex_lock(&metadata->metadata_rdv_lock); | |
344 | ||
345 | /* | |
346 | * Release metadata stream lock so the metadata thread can process it. | |
347 | */ | |
348 | pthread_mutex_unlock(&metadata->lock); | |
349 | ||
350 | /* | |
351 | * Wait on the rendez-vous point. Once woken up, it means the metadata was | |
352 | * consumed and thus synchronization is achieved. | |
353 | */ | |
354 | pthread_cond_wait(&metadata->metadata_rdv, &metadata->metadata_rdv_lock); | |
355 | pthread_mutex_unlock(&metadata->metadata_rdv_lock); | |
577eea73 | 356 | } while (status == SYNC_METADATA_STATUS_NEW_DATA); |
6f9449c2 JG |
357 | |
358 | /* Success */ | |
359 | return 0; | |
360 | ||
361 | end_unlock_mutex: | |
362 | pthread_mutex_unlock(&metadata->lock); | |
363 | return ret; | |
364 | } | |
365 | ||
366 | /* | |
367 | * Synchronize the metadata using a given session ID. A successful acquisition | |
368 | * of a metadata stream will trigger a request to the session daemon and a | |
369 | * snapshot so the metadata thread can consume it. | |
370 | * | |
371 | * This function call is a rendez-vous point between the metadata thread and | |
372 | * the data thread. | |
373 | * | |
374 | * Return 0 on success or else a negative value. | |
375 | */ | |
376 | int consumer_stream_sync_metadata(struct lttng_consumer_local_data *ctx, | |
377 | uint64_t session_id) | |
378 | { | |
379 | int ret; | |
380 | struct lttng_consumer_stream *stream = NULL; | |
381 | struct lttng_ht_iter iter; | |
382 | struct lttng_ht *ht; | |
383 | ||
a0377dfe | 384 | LTTNG_ASSERT(ctx); |
6f9449c2 JG |
385 | |
386 | /* Ease our life a bit. */ | |
fa29bfbf | 387 | ht = the_consumer_data.stream_list_ht; |
6f9449c2 JG |
388 | |
389 | rcu_read_lock(); | |
390 | ||
391 | /* Search the metadata associated with the session id of the given stream. */ | |
392 | ||
393 | cds_lfht_for_each_entry_duplicate(ht->ht, | |
394 | ht->hash_fct(&session_id, lttng_ht_seed), ht->match_fct, | |
395 | &session_id, &iter.iter, stream, node_session_id.node) { | |
396 | if (!stream->metadata_flag) { | |
397 | continue; | |
398 | } | |
399 | ||
400 | ret = do_sync_metadata(stream, ctx); | |
401 | if (ret < 0) { | |
402 | goto end; | |
403 | } | |
404 | } | |
405 | ||
406 | /* | |
407 | * Force return code to 0 (success) since ret might be ENODATA for instance | |
408 | * which is not an error but rather that we should come back. | |
409 | */ | |
410 | ret = 0; | |
411 | ||
412 | end: | |
413 | rcu_read_unlock(); | |
414 | return ret; | |
415 | } | |
416 | ||
417 | static int consumer_stream_sync_metadata_index( | |
418 | struct lttng_consumer_stream *stream, | |
419 | const struct stream_subbuffer *subbuffer, | |
420 | struct lttng_consumer_local_data *ctx) | |
421 | { | |
6653fca6 | 422 | bool missed_metadata_flush; |
6f9449c2 JG |
423 | int ret; |
424 | ||
425 | /* Block until all the metadata is sent. */ | |
426 | pthread_mutex_lock(&stream->metadata_timer_lock); | |
a0377dfe | 427 | LTTNG_ASSERT(!stream->missed_metadata_flush); |
6f9449c2 JG |
428 | stream->waiting_on_metadata = true; |
429 | pthread_mutex_unlock(&stream->metadata_timer_lock); | |
430 | ||
431 | ret = consumer_stream_sync_metadata(ctx, stream->session_id); | |
432 | ||
433 | pthread_mutex_lock(&stream->metadata_timer_lock); | |
434 | stream->waiting_on_metadata = false; | |
6653fca6 MD |
435 | missed_metadata_flush = stream->missed_metadata_flush; |
436 | if (missed_metadata_flush) { | |
6f9449c2 | 437 | stream->missed_metadata_flush = false; |
6f9449c2 | 438 | } |
6653fca6 | 439 | pthread_mutex_unlock(&stream->metadata_timer_lock); |
6f9449c2 JG |
440 | if (ret < 0) { |
441 | goto end; | |
442 | } | |
443 | ||
444 | ret = consumer_stream_send_index(stream, subbuffer, ctx); | |
6653fca6 MD |
445 | /* |
446 | * Send the live inactivity beacon to handle the situation where | |
447 | * the live timer is prevented from sampling this stream | |
448 | * because the stream lock was being held while this stream is | |
449 | * waiting on metadata. This ensures live viewer progress in the | |
450 | * unlikely scenario where a live timer would be prevented from | |
451 | * locking a stream lock repeatedly due to a steady flow of | |
452 | * incoming metadata, for a stream which is mostly inactive. | |
453 | * | |
454 | * It is important to send the inactivity beacon packet to | |
455 | * relayd _after_ sending the index associated with the data | |
456 | * that was just sent, otherwise this can cause live viewers to | |
457 | * observe timestamps going backwards between an inactivity | |
458 | * beacon and a following trace packet. | |
459 | */ | |
460 | if (missed_metadata_flush) { | |
461 | (void) stream->read_subbuffer_ops.send_live_beacon(stream); | |
462 | } | |
6f9449c2 JG |
463 | end: |
464 | return ret; | |
465 | } | |
466 | ||
467 | /* | |
468 | * Check if the local version of the metadata stream matches with the version | |
469 | * of the metadata stream in the kernel. If it was updated, set the reset flag | |
470 | * on the stream. | |
471 | */ | |
472 | static | |
473 | int metadata_stream_check_version(struct lttng_consumer_stream *stream, | |
474 | const struct stream_subbuffer *subbuffer) | |
475 | { | |
476 | if (stream->metadata_version == subbuffer->info.metadata.version) { | |
477 | goto end; | |
478 | } | |
479 | ||
480 | DBG("New metadata version detected"); | |
55954e07 JG |
481 | consumer_stream_metadata_set_version(stream, |
482 | subbuffer->info.metadata.version); | |
f5ba75b4 | 483 | |
6f9449c2 JG |
484 | if (stream->read_subbuffer_ops.reset_metadata) { |
485 | stream->read_subbuffer_ops.reset_metadata(stream); | |
486 | } | |
487 | ||
488 | end: | |
489 | return 0; | |
490 | } | |
491 | ||
503fefca JG |
492 | static |
493 | bool stream_is_rotating_to_null_chunk( | |
494 | const struct lttng_consumer_stream *stream) | |
495 | { | |
496 | bool rotating_to_null_chunk = false; | |
497 | ||
498 | if (stream->rotate_position == -1ULL) { | |
499 | /* No rotation ongoing. */ | |
500 | goto end; | |
501 | } | |
502 | ||
503 | if (stream->trace_chunk == stream->chan->trace_chunk || | |
504 | !stream->chan->trace_chunk) { | |
505 | rotating_to_null_chunk = true; | |
506 | } | |
507 | end: | |
508 | return rotating_to_null_chunk; | |
509 | } | |
510 | ||
511 | enum consumer_stream_open_packet_status consumer_stream_open_packet( | |
512 | struct lttng_consumer_stream *stream) | |
513 | { | |
514 | int ret; | |
515 | enum consumer_stream_open_packet_status status; | |
516 | unsigned long produced_pos_before, produced_pos_after; | |
517 | ||
518 | ret = lttng_consumer_sample_snapshot_positions(stream); | |
519 | if (ret < 0) { | |
520 | ERR("Failed to snapshot positions before post-rotation empty packet flush: stream id = %" PRIu64 | |
521 | ", channel name = %s, session id = %" PRIu64, | |
522 | stream->key, stream->chan->name, | |
523 | stream->chan->session_id); | |
524 | status = CONSUMER_STREAM_OPEN_PACKET_STATUS_ERROR; | |
525 | goto end; | |
526 | } | |
527 | ||
528 | ret = lttng_consumer_get_produced_snapshot( | |
529 | stream, &produced_pos_before); | |
530 | if (ret < 0) { | |
531 | ERR("Failed to read produced position before post-rotation empty packet flush: stream id = %" PRIu64 | |
532 | ", channel name = %s, session id = %" PRIu64, | |
533 | stream->key, stream->chan->name, | |
534 | stream->chan->session_id); | |
535 | status = CONSUMER_STREAM_OPEN_PACKET_STATUS_ERROR; | |
536 | goto end; | |
537 | } | |
538 | ||
539 | ret = consumer_stream_flush_buffer(stream, 0); | |
540 | if (ret) { | |
541 | ERR("Failed to flush an empty packet at rotation point: stream id = %" PRIu64 | |
542 | ", channel name = %s, session id = %" PRIu64, | |
543 | stream->key, stream->chan->name, | |
544 | stream->chan->session_id); | |
545 | status = CONSUMER_STREAM_OPEN_PACKET_STATUS_ERROR; | |
546 | goto end; | |
547 | } | |
548 | ||
549 | ret = lttng_consumer_sample_snapshot_positions(stream); | |
550 | if (ret < 0) { | |
551 | ERR("Failed to snapshot positions after post-rotation empty packet flush: stream id = %" PRIu64 | |
552 | ", channel name = %s, session id = %" PRIu64, | |
553 | stream->key, stream->chan->name, | |
554 | stream->chan->session_id); | |
555 | status = CONSUMER_STREAM_OPEN_PACKET_STATUS_ERROR; | |
556 | goto end; | |
557 | } | |
558 | ||
559 | ret = lttng_consumer_get_produced_snapshot(stream, &produced_pos_after); | |
560 | if (ret < 0) { | |
561 | ERR("Failed to read produced position after post-rotation empty packet flush: stream id = %" PRIu64 | |
562 | ", channel name = %s, session id = %" PRIu64, | |
563 | stream->key, stream->chan->name, | |
564 | stream->chan->session_id); | |
565 | status = CONSUMER_STREAM_OPEN_PACKET_STATUS_ERROR; | |
566 | goto end; | |
567 | } | |
568 | ||
569 | /* | |
570 | * Determine if the flush had an effect by comparing the produced | |
571 | * positons before and after the flush. | |
572 | */ | |
573 | status = produced_pos_before != produced_pos_after ? | |
574 | CONSUMER_STREAM_OPEN_PACKET_STATUS_OPENED : | |
575 | CONSUMER_STREAM_OPEN_PACKET_STATUS_NO_SPACE; | |
576 | if (status == CONSUMER_STREAM_OPEN_PACKET_STATUS_OPENED) { | |
577 | stream->opened_packet_in_current_trace_chunk = true; | |
578 | } | |
579 | ||
580 | end: | |
581 | return status; | |
582 | } | |
583 | ||
584 | /* | |
585 | * An attempt to open a new packet is performed after a rotation completes to | |
586 | * get a begin timestamp as close as possible to the rotation point. | |
587 | * | |
588 | * However, that initial attempt at opening a packet can fail due to a full | |
589 | * ring-buffer. In that case, a second attempt is performed after consuming | |
590 | * a packet since that will have freed enough space in the ring-buffer. | |
591 | */ | |
592 | static | |
593 | int post_consume_open_new_packet(struct lttng_consumer_stream *stream, | |
594 | const struct stream_subbuffer *subbuffer, | |
595 | struct lttng_consumer_local_data *ctx) | |
596 | { | |
597 | int ret = 0; | |
598 | ||
599 | if (!stream->opened_packet_in_current_trace_chunk && | |
600 | stream->trace_chunk && | |
601 | !stream_is_rotating_to_null_chunk(stream)) { | |
602 | const enum consumer_stream_open_packet_status status = | |
603 | consumer_stream_open_packet(stream); | |
604 | ||
605 | switch (status) { | |
606 | case CONSUMER_STREAM_OPEN_PACKET_STATUS_OPENED: | |
607 | DBG("Opened a packet after consuming a packet rotation: stream id = %" PRIu64 | |
608 | ", channel name = %s, session id = %" PRIu64, | |
609 | stream->key, stream->chan->name, | |
610 | stream->chan->session_id); | |
611 | stream->opened_packet_in_current_trace_chunk = true; | |
612 | break; | |
613 | case CONSUMER_STREAM_OPEN_PACKET_STATUS_NO_SPACE: | |
614 | /* | |
615 | * Can't open a packet as there is no space left. | |
616 | * This means that new events were produced, resulting | |
617 | * in a packet being opened, which is what we want | |
618 | * anyhow. | |
619 | */ | |
620 | DBG("No space left to open a packet after consuming a packet: stream id = %" PRIu64 | |
621 | ", channel name = %s, session id = %" PRIu64, | |
622 | stream->key, stream->chan->name, | |
623 | stream->chan->session_id); | |
624 | stream->opened_packet_in_current_trace_chunk = true; | |
625 | break; | |
626 | case CONSUMER_STREAM_OPEN_PACKET_STATUS_ERROR: | |
627 | /* Logged by callee. */ | |
628 | ret = -1; | |
629 | goto end; | |
630 | default: | |
631 | abort(); | |
632 | } | |
633 | ||
634 | stream->opened_packet_in_current_trace_chunk = true; | |
635 | } | |
636 | ||
637 | end: | |
638 | return ret; | |
639 | } | |
640 | ||
6f9449c2 JG |
641 | struct lttng_consumer_stream *consumer_stream_create( |
642 | struct lttng_consumer_channel *channel, | |
643 | uint64_t channel_key, | |
644 | uint64_t stream_key, | |
645 | const char *channel_name, | |
646 | uint64_t relayd_id, | |
647 | uint64_t session_id, | |
648 | struct lttng_trace_chunk *trace_chunk, | |
649 | int cpu, | |
650 | int *alloc_ret, | |
651 | enum consumer_channel_type type, | |
652 | unsigned int monitor) | |
653 | { | |
654 | int ret; | |
655 | struct lttng_consumer_stream *stream; | |
656 | ||
97535efa | 657 | stream = (lttng_consumer_stream *) zmalloc(sizeof(*stream)); |
6f9449c2 JG |
658 | if (stream == NULL) { |
659 | PERROR("malloc struct lttng_consumer_stream"); | |
660 | ret = -ENOMEM; | |
661 | goto end; | |
662 | } | |
663 | ||
63e9caa2 MD |
664 | rcu_read_lock(); |
665 | ||
6f9449c2 JG |
666 | if (trace_chunk && !lttng_trace_chunk_get(trace_chunk)) { |
667 | ERR("Failed to acquire trace chunk reference during the creation of a stream"); | |
668 | ret = -1; | |
669 | goto error; | |
670 | } | |
671 | ||
6f9449c2 JG |
672 | stream->chan = channel; |
673 | stream->key = stream_key; | |
674 | stream->trace_chunk = trace_chunk; | |
675 | stream->out_fd = -1; | |
676 | stream->out_fd_offset = 0; | |
677 | stream->output_written = 0; | |
678 | stream->net_seq_idx = relayd_id; | |
679 | stream->session_id = session_id; | |
680 | stream->monitor = monitor; | |
681 | stream->endpoint_status = CONSUMER_ENDPOINT_ACTIVE; | |
682 | stream->index_file = NULL; | |
683 | stream->last_sequence_number = -1ULL; | |
684 | stream->rotate_position = -1ULL; | |
f96af312 JG |
685 | /* Buffer is created with an open packet. */ |
686 | stream->opened_packet_in_current_trace_chunk = true; | |
6f9449c2 JG |
687 | pthread_mutex_init(&stream->lock, NULL); |
688 | pthread_mutex_init(&stream->metadata_timer_lock, NULL); | |
689 | ||
690 | /* If channel is the metadata, flag this stream as metadata. */ | |
691 | if (type == CONSUMER_CHANNEL_TYPE_METADATA) { | |
692 | stream->metadata_flag = 1; | |
693 | /* Metadata is flat out. */ | |
694 | strncpy(stream->name, DEFAULT_METADATA_NAME, sizeof(stream->name)); | |
695 | /* Live rendez-vous point. */ | |
696 | pthread_cond_init(&stream->metadata_rdv, NULL); | |
697 | pthread_mutex_init(&stream->metadata_rdv_lock, NULL); | |
698 | } else { | |
699 | /* Format stream name to <channel_name>_<cpu_number> */ | |
700 | ret = snprintf(stream->name, sizeof(stream->name), "%s_%d", | |
701 | channel_name, cpu); | |
702 | if (ret < 0) { | |
703 | PERROR("snprintf stream name"); | |
704 | goto error; | |
705 | } | |
706 | } | |
707 | ||
708 | switch (channel->output) { | |
709 | case CONSUMER_CHANNEL_SPLICE: | |
710 | stream->output = LTTNG_EVENT_SPLICE; | |
711 | ret = utils_create_pipe(stream->splice_pipe); | |
712 | if (ret < 0) { | |
713 | goto error; | |
714 | } | |
715 | break; | |
716 | case CONSUMER_CHANNEL_MMAP: | |
717 | stream->output = LTTNG_EVENT_MMAP; | |
718 | break; | |
719 | default: | |
720 | abort(); | |
721 | } | |
722 | ||
723 | /* Key is always the wait_fd for streams. */ | |
724 | lttng_ht_node_init_u64(&stream->node, stream->key); | |
725 | ||
726 | /* Init node per channel id key */ | |
727 | lttng_ht_node_init_u64(&stream->node_channel_id, channel_key); | |
728 | ||
729 | /* Init session id node with the stream session id */ | |
730 | lttng_ht_node_init_u64(&stream->node_session_id, stream->session_id); | |
731 | ||
732 | DBG3("Allocated stream %s (key %" PRIu64 ", chan_key %" PRIu64 | |
733 | " relayd_id %" PRIu64 ", session_id %" PRIu64, | |
734 | stream->name, stream->key, channel_key, | |
735 | stream->net_seq_idx, stream->session_id); | |
736 | ||
737 | rcu_read_unlock(); | |
738 | ||
503fefca JG |
739 | lttng_dynamic_array_init(&stream->read_subbuffer_ops.post_consume_cbs, |
740 | sizeof(post_consume_cb), NULL); | |
741 | ||
6f9449c2 JG |
742 | if (type == CONSUMER_CHANNEL_TYPE_METADATA) { |
743 | stream->read_subbuffer_ops.lock = | |
744 | consumer_stream_metadata_lock_all; | |
745 | stream->read_subbuffer_ops.unlock = | |
746 | consumer_stream_metadata_unlock_all; | |
947bd097 JR |
747 | stream->read_subbuffer_ops.assert_locked = |
748 | consumer_stream_metadata_assert_locked_all; | |
6f9449c2 JG |
749 | stream->read_subbuffer_ops.pre_consume_subbuffer = |
750 | metadata_stream_check_version; | |
751 | } else { | |
503fefca JG |
752 | const post_consume_cb post_consume_index_op = channel->is_live ? |
753 | consumer_stream_sync_metadata_index : | |
754 | consumer_stream_send_index; | |
97535efa SM |
755 | const post_consume_cb post_consume_open_new_packet_ = |
756 | post_consume_open_new_packet; | |
503fefca JG |
757 | |
758 | ret = lttng_dynamic_array_add_element( | |
759 | &stream->read_subbuffer_ops.post_consume_cbs, | |
760 | &post_consume_index_op); | |
761 | if (ret) { | |
762 | PERROR("Failed to add `send index` callback to stream's post consumption callbacks"); | |
763 | goto error; | |
764 | } | |
765 | ||
766 | ret = lttng_dynamic_array_add_element( | |
767 | &stream->read_subbuffer_ops.post_consume_cbs, | |
97535efa | 768 | &post_consume_open_new_packet_); |
503fefca JG |
769 | if (ret) { |
770 | PERROR("Failed to add `open new packet` callback to stream's post consumption callbacks"); | |
771 | goto error; | |
772 | } | |
773 | ||
6f9449c2 JG |
774 | stream->read_subbuffer_ops.lock = consumer_stream_data_lock_all; |
775 | stream->read_subbuffer_ops.unlock = | |
776 | consumer_stream_data_unlock_all; | |
947bd097 JR |
777 | stream->read_subbuffer_ops.assert_locked = |
778 | consumer_stream_data_assert_locked_all; | |
6f9449c2 JG |
779 | stream->read_subbuffer_ops.pre_consume_subbuffer = |
780 | consumer_stream_update_stats; | |
6f9449c2 JG |
781 | } |
782 | ||
783 | if (channel->output == CONSUMER_CHANNEL_MMAP) { | |
784 | stream->read_subbuffer_ops.consume_subbuffer = | |
785 | consumer_stream_consume_mmap; | |
786 | } else { | |
787 | stream->read_subbuffer_ops.consume_subbuffer = | |
788 | consumer_stream_consume_splice; | |
789 | } | |
790 | ||
791 | return stream; | |
792 | ||
793 | error: | |
794 | rcu_read_unlock(); | |
795 | lttng_trace_chunk_put(stream->trace_chunk); | |
503fefca | 796 | lttng_dynamic_array_reset(&stream->read_subbuffer_ops.post_consume_cbs); |
6f9449c2 JG |
797 | free(stream); |
798 | end: | |
799 | if (alloc_ret) { | |
800 | *alloc_ret = ret; | |
801 | } | |
802 | return NULL; | |
803 | } | |
804 | ||
51230d70 DG |
805 | /* |
806 | * Close stream on the relayd side. This call can destroy a relayd if the | |
807 | * conditions are met. | |
808 | * | |
809 | * A RCU read side lock MUST be acquired if the relayd object was looked up in | |
810 | * a hash table before calling this. | |
811 | */ | |
812 | void consumer_stream_relayd_close(struct lttng_consumer_stream *stream, | |
813 | struct consumer_relayd_sock_pair *relayd) | |
814 | { | |
815 | int ret; | |
816 | ||
a0377dfe FD |
817 | LTTNG_ASSERT(stream); |
818 | LTTNG_ASSERT(relayd); | |
51230d70 | 819 | |
d01178b6 DG |
820 | if (stream->sent_to_relayd) { |
821 | uatomic_dec(&relayd->refcount); | |
a0377dfe | 822 | LTTNG_ASSERT(uatomic_read(&relayd->refcount) >= 0); |
d01178b6 | 823 | } |
51230d70 DG |
824 | |
825 | /* Closing streams requires to lock the control socket. */ | |
826 | pthread_mutex_lock(&relayd->ctrl_sock_mutex); | |
827 | ret = relayd_send_close_stream(&relayd->control_sock, | |
828 | stream->relayd_stream_id, | |
829 | stream->next_net_seq_num - 1); | |
830 | pthread_mutex_unlock(&relayd->ctrl_sock_mutex); | |
831 | if (ret < 0) { | |
9276e5c8 JR |
832 | ERR("Relayd send close stream failed. Cleaning up relayd %" PRIu64 ".", relayd->net_seq_idx); |
833 | lttng_consumer_cleanup_relayd(relayd); | |
51230d70 DG |
834 | } |
835 | ||
836 | /* Both conditions are met, we destroy the relayd. */ | |
837 | if (uatomic_read(&relayd->refcount) == 0 && | |
838 | uatomic_read(&relayd->destroy_flag)) { | |
839 | consumer_destroy_relayd(relayd); | |
840 | } | |
10a50311 | 841 | stream->net_seq_idx = (uint64_t) -1ULL; |
d01178b6 | 842 | stream->sent_to_relayd = 0; |
51230d70 DG |
843 | } |
844 | ||
845 | /* | |
846 | * Close stream's file descriptors and, if needed, close stream also on the | |
847 | * relayd side. | |
848 | * | |
849 | * The consumer data lock MUST be acquired. | |
850 | * The stream lock MUST be acquired. | |
851 | */ | |
852 | void consumer_stream_close(struct lttng_consumer_stream *stream) | |
853 | { | |
854 | int ret; | |
855 | struct consumer_relayd_sock_pair *relayd; | |
856 | ||
a0377dfe | 857 | LTTNG_ASSERT(stream); |
51230d70 | 858 | |
fa29bfbf | 859 | switch (the_consumer_data.type) { |
51230d70 DG |
860 | case LTTNG_CONSUMER_KERNEL: |
861 | if (stream->mmap_base != NULL) { | |
862 | ret = munmap(stream->mmap_base, stream->mmap_len); | |
863 | if (ret != 0) { | |
864 | PERROR("munmap"); | |
865 | } | |
866 | } | |
867 | ||
868 | if (stream->wait_fd >= 0) { | |
869 | ret = close(stream->wait_fd); | |
870 | if (ret) { | |
871 | PERROR("close"); | |
872 | } | |
10a50311 | 873 | stream->wait_fd = -1; |
51230d70 | 874 | } |
a2361a61 JD |
875 | if (stream->chan->output == CONSUMER_CHANNEL_SPLICE) { |
876 | utils_close_pipe(stream->splice_pipe); | |
877 | } | |
51230d70 DG |
878 | break; |
879 | case LTTNG_CONSUMER32_UST: | |
880 | case LTTNG_CONSUMER64_UST: | |
6d574024 DG |
881 | { |
882 | /* | |
883 | * Special case for the metadata since the wait fd is an internal pipe | |
884 | * polled in the metadata thread. | |
885 | */ | |
886 | if (stream->metadata_flag && stream->chan->monitor) { | |
887 | int rpipe = stream->ust_metadata_poll_pipe[0]; | |
888 | ||
889 | /* | |
890 | * This will stop the channel timer if one and close the write side | |
891 | * of the metadata poll pipe. | |
892 | */ | |
893 | lttng_ustconsumer_close_metadata(stream->chan); | |
894 | if (rpipe >= 0) { | |
895 | ret = close(rpipe); | |
896 | if (ret < 0) { | |
b4a650f3 | 897 | PERROR("closing metadata pipe read side"); |
6d574024 DG |
898 | } |
899 | stream->ust_metadata_poll_pipe[0] = -1; | |
900 | } | |
901 | } | |
51230d70 | 902 | break; |
6d574024 | 903 | } |
51230d70 DG |
904 | default: |
905 | ERR("Unknown consumer_data type"); | |
a0377dfe | 906 | abort(); |
51230d70 DG |
907 | } |
908 | ||
909 | /* Close output fd. Could be a socket or local file at this point. */ | |
910 | if (stream->out_fd >= 0) { | |
911 | ret = close(stream->out_fd); | |
912 | if (ret) { | |
913 | PERROR("close"); | |
914 | } | |
10a50311 | 915 | stream->out_fd = -1; |
51230d70 DG |
916 | } |
917 | ||
f8f3885c MD |
918 | if (stream->index_file) { |
919 | lttng_index_file_put(stream->index_file); | |
920 | stream->index_file = NULL; | |
309167d2 JD |
921 | } |
922 | ||
d2956687 JG |
923 | lttng_trace_chunk_put(stream->trace_chunk); |
924 | stream->trace_chunk = NULL; | |
925 | ||
51230d70 DG |
926 | /* Check and cleanup relayd if needed. */ |
927 | rcu_read_lock(); | |
928 | relayd = consumer_find_relayd(stream->net_seq_idx); | |
929 | if (relayd != NULL) { | |
930 | consumer_stream_relayd_close(stream, relayd); | |
931 | } | |
932 | rcu_read_unlock(); | |
933 | } | |
934 | ||
935 | /* | |
936 | * Delete the stream from all possible hash tables. | |
937 | * | |
938 | * The consumer data lock MUST be acquired. | |
939 | * The stream lock MUST be acquired. | |
940 | */ | |
941 | void consumer_stream_delete(struct lttng_consumer_stream *stream, | |
942 | struct lttng_ht *ht) | |
943 | { | |
944 | int ret; | |
945 | struct lttng_ht_iter iter; | |
946 | ||
a0377dfe | 947 | LTTNG_ASSERT(stream); |
10a50311 | 948 | /* Should NEVER be called not in monitor mode. */ |
a0377dfe | 949 | LTTNG_ASSERT(stream->chan->monitor); |
51230d70 DG |
950 | |
951 | rcu_read_lock(); | |
952 | ||
953 | if (ht) { | |
954 | iter.iter.node = &stream->node.node; | |
955 | ret = lttng_ht_del(ht, &iter); | |
a0377dfe | 956 | LTTNG_ASSERT(!ret); |
51230d70 DG |
957 | } |
958 | ||
959 | /* Delete from stream per channel ID hash table. */ | |
960 | iter.iter.node = &stream->node_channel_id.node; | |
961 | /* | |
962 | * The returned value is of no importance. Even if the node is NOT in the | |
963 | * hash table, we continue since we may have been called by a code path | |
964 | * that did not add the stream to a (all) hash table. Same goes for the | |
965 | * next call ht del call. | |
966 | */ | |
fa29bfbf | 967 | (void) lttng_ht_del(the_consumer_data.stream_per_chan_id_ht, &iter); |
51230d70 DG |
968 | |
969 | /* Delete from the global stream list. */ | |
970 | iter.iter.node = &stream->node_session_id.node; | |
971 | /* See the previous ht del on why we ignore the returned value. */ | |
fa29bfbf | 972 | (void) lttng_ht_del(the_consumer_data.stream_list_ht, &iter); |
51230d70 DG |
973 | |
974 | rcu_read_unlock(); | |
975 | ||
6d574024 DG |
976 | if (!stream->metadata_flag) { |
977 | /* Decrement the stream count of the global consumer data. */ | |
a0377dfe | 978 | LTTNG_ASSERT(the_consumer_data.stream_count > 0); |
fa29bfbf | 979 | the_consumer_data.stream_count--; |
6d574024 | 980 | } |
51230d70 DG |
981 | } |
982 | ||
983 | /* | |
984 | * Free the given stream within a RCU call. | |
985 | */ | |
986 | void consumer_stream_free(struct lttng_consumer_stream *stream) | |
987 | { | |
a0377dfe | 988 | LTTNG_ASSERT(stream); |
51230d70 | 989 | |
f5ba75b4 | 990 | metadata_bucket_destroy(stream->metadata_bucket); |
51230d70 DG |
991 | call_rcu(&stream->node.head, free_stream_rcu); |
992 | } | |
993 | ||
994 | /* | |
10a50311 | 995 | * Destroy the stream's buffers of the tracer. |
51230d70 | 996 | */ |
10a50311 | 997 | void consumer_stream_destroy_buffers(struct lttng_consumer_stream *stream) |
51230d70 | 998 | { |
a0377dfe | 999 | LTTNG_ASSERT(stream); |
10a50311 | 1000 | |
fa29bfbf | 1001 | switch (the_consumer_data.type) { |
10a50311 JD |
1002 | case LTTNG_CONSUMER_KERNEL: |
1003 | break; | |
1004 | case LTTNG_CONSUMER32_UST: | |
1005 | case LTTNG_CONSUMER64_UST: | |
1006 | lttng_ustconsumer_del_stream(stream); | |
1007 | break; | |
1008 | default: | |
1009 | ERR("Unknown consumer_data type"); | |
a0377dfe | 1010 | abort(); |
10a50311 JD |
1011 | } |
1012 | } | |
51230d70 | 1013 | |
10a50311 | 1014 | /* |
4891ece8 | 1015 | * Destroy and close a already created stream. |
10a50311 | 1016 | */ |
4891ece8 | 1017 | static void destroy_close_stream(struct lttng_consumer_stream *stream) |
10a50311 | 1018 | { |
a0377dfe | 1019 | LTTNG_ASSERT(stream); |
51230d70 | 1020 | |
4891ece8 | 1021 | DBG("Consumer stream destroy monitored key: %" PRIu64, stream->key); |
10a50311 JD |
1022 | |
1023 | /* Destroy tracer buffers of the stream. */ | |
1024 | consumer_stream_destroy_buffers(stream); | |
1025 | /* Close down everything including the relayd if one. */ | |
1026 | consumer_stream_close(stream); | |
1027 | } | |
51230d70 | 1028 | |
10a50311 | 1029 | /* |
4891ece8 DG |
1030 | * Decrement the stream's channel refcount and if down to 0, return the channel |
1031 | * pointer so it can be destroyed by the caller or NULL if not. | |
10a50311 | 1032 | */ |
4891ece8 DG |
1033 | static struct lttng_consumer_channel *unref_channel( |
1034 | struct lttng_consumer_stream *stream) | |
10a50311 | 1035 | { |
4891ece8 DG |
1036 | struct lttng_consumer_channel *free_chan = NULL; |
1037 | ||
a0377dfe FD |
1038 | LTTNG_ASSERT(stream); |
1039 | LTTNG_ASSERT(stream->chan); | |
10a50311 | 1040 | |
4891ece8 DG |
1041 | /* Update refcount of channel and see if we need to destroy it. */ |
1042 | if (!uatomic_sub_return(&stream->chan->refcount, 1) | |
1043 | && !uatomic_read(&stream->chan->nb_init_stream_left)) { | |
1044 | free_chan = stream->chan; | |
1045 | } | |
51230d70 | 1046 | |
4891ece8 | 1047 | return free_chan; |
10a50311 | 1048 | } |
51230d70 | 1049 | |
10a50311 JD |
1050 | /* |
1051 | * Destroy a stream completely. This will delete, close and free the stream. | |
1052 | * Once return, the stream is NO longer usable. Its channel may get destroyed | |
1053 | * if conditions are met for a monitored stream. | |
1054 | * | |
1055 | * This MUST be called WITHOUT the consumer data and stream lock acquired if | |
1056 | * the stream is in _monitor_ mode else it does not matter. | |
1057 | */ | |
1058 | void consumer_stream_destroy(struct lttng_consumer_stream *stream, | |
1059 | struct lttng_ht *ht) | |
1060 | { | |
a0377dfe | 1061 | LTTNG_ASSERT(stream); |
10a50311 JD |
1062 | |
1063 | /* Stream is in monitor mode. */ | |
4891ece8 | 1064 | if (stream->monitor) { |
10a50311 | 1065 | struct lttng_consumer_channel *free_chan = NULL; |
51230d70 | 1066 | |
4891ece8 DG |
1067 | /* |
1068 | * This means that the stream was successfully removed from the streams | |
1069 | * list of the channel and sent to the right thread managing this | |
1070 | * stream thus being globally visible. | |
1071 | */ | |
1072 | if (stream->globally_visible) { | |
fa29bfbf | 1073 | pthread_mutex_lock(&the_consumer_data.lock); |
a9838785 | 1074 | pthread_mutex_lock(&stream->chan->lock); |
4891ece8 DG |
1075 | pthread_mutex_lock(&stream->lock); |
1076 | /* Remove every reference of the stream in the consumer. */ | |
1077 | consumer_stream_delete(stream, ht); | |
1078 | ||
1079 | destroy_close_stream(stream); | |
1080 | ||
1081 | /* Update channel's refcount of the stream. */ | |
1082 | free_chan = unref_channel(stream); | |
1083 | ||
1084 | /* Indicates that the consumer data state MUST be updated after this. */ | |
fa29bfbf | 1085 | the_consumer_data.need_update = 1; |
4891ece8 DG |
1086 | |
1087 | pthread_mutex_unlock(&stream->lock); | |
a9838785 | 1088 | pthread_mutex_unlock(&stream->chan->lock); |
fa29bfbf | 1089 | pthread_mutex_unlock(&the_consumer_data.lock); |
4891ece8 DG |
1090 | } else { |
1091 | /* | |
1092 | * If the stream is not visible globally, this needs to be done | |
1093 | * outside of the consumer data lock section. | |
1094 | */ | |
38aea171 | 1095 | destroy_close_stream(stream); |
4891ece8 | 1096 | free_chan = unref_channel(stream); |
10a50311 JD |
1097 | } |
1098 | ||
10a50311 JD |
1099 | if (free_chan) { |
1100 | consumer_del_channel(free_chan); | |
1101 | } | |
1102 | } else { | |
4891ece8 | 1103 | destroy_close_stream(stream); |
51230d70 DG |
1104 | } |
1105 | ||
1106 | /* Free stream within a RCU call. */ | |
d2956687 JG |
1107 | lttng_trace_chunk_put(stream->trace_chunk); |
1108 | stream->trace_chunk = NULL; | |
503fefca | 1109 | lttng_dynamic_array_reset(&stream->read_subbuffer_ops.post_consume_cbs); |
51230d70 DG |
1110 | consumer_stream_free(stream); |
1111 | } | |
1c20f0e2 JD |
1112 | |
1113 | /* | |
1114 | * Write index of a specific stream either on the relayd or local disk. | |
1115 | * | |
1116 | * Return 0 on success or else a negative value. | |
1117 | */ | |
1118 | int consumer_stream_write_index(struct lttng_consumer_stream *stream, | |
f8f3885c | 1119 | struct ctf_packet_index *element) |
1c20f0e2 JD |
1120 | { |
1121 | int ret; | |
1c20f0e2 | 1122 | |
a0377dfe FD |
1123 | LTTNG_ASSERT(stream); |
1124 | LTTNG_ASSERT(element); | |
1c20f0e2 JD |
1125 | |
1126 | rcu_read_lock(); | |
23c910e5 JR |
1127 | if (stream->net_seq_idx != (uint64_t) -1ULL) { |
1128 | struct consumer_relayd_sock_pair *relayd; | |
1129 | relayd = consumer_find_relayd(stream->net_seq_idx); | |
1130 | if (relayd) { | |
1131 | pthread_mutex_lock(&relayd->ctrl_sock_mutex); | |
1132 | ret = relayd_send_index(&relayd->control_sock, element, | |
1c20f0e2 | 1133 | stream->relayd_stream_id, stream->next_net_seq_num - 1); |
9276e5c8 JR |
1134 | if (ret < 0) { |
1135 | /* | |
1136 | * Communication error with lttng-relayd, | |
1137 | * perform cleanup now | |
1138 | */ | |
1139 | ERR("Relayd send index failed. Cleaning up relayd %" PRIu64 ".", relayd->net_seq_idx); | |
1140 | lttng_consumer_cleanup_relayd(relayd); | |
1141 | ret = -1; | |
1142 | } | |
23c910e5 JR |
1143 | pthread_mutex_unlock(&relayd->ctrl_sock_mutex); |
1144 | } else { | |
1145 | ERR("Stream %" PRIu64 " relayd ID %" PRIu64 " unknown. Can't write index.", | |
1146 | stream->key, stream->net_seq_idx); | |
1147 | ret = -1; | |
1148 | } | |
1c20f0e2 | 1149 | } else { |
f8f3885c | 1150 | if (lttng_index_file_write(stream->index_file, element)) { |
6cd525e8 MD |
1151 | ret = -1; |
1152 | } else { | |
1153 | ret = 0; | |
1154 | } | |
1c20f0e2 JD |
1155 | } |
1156 | if (ret < 0) { | |
1157 | goto error; | |
1158 | } | |
1159 | ||
1160 | error: | |
1161 | rcu_read_unlock(); | |
1162 | return ret; | |
1163 | } | |
94d49140 | 1164 | |
d2956687 JG |
1165 | int consumer_stream_create_output_files(struct lttng_consumer_stream *stream, |
1166 | bool create_index) | |
1167 | { | |
1168 | int ret; | |
1169 | enum lttng_trace_chunk_status chunk_status; | |
1170 | const int flags = O_WRONLY | O_CREAT | O_TRUNC; | |
1171 | const mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP; | |
1172 | char stream_path[LTTNG_PATH_MAX]; | |
1173 | ||
1174 | ASSERT_LOCKED(stream->lock); | |
a0377dfe | 1175 | LTTNG_ASSERT(stream->trace_chunk); |
d2956687 JG |
1176 | |
1177 | ret = utils_stream_file_path(stream->chan->pathname, stream->name, | |
1178 | stream->chan->tracefile_size, | |
3b16476a | 1179 | stream->tracefile_count_current, NULL, |
d2956687 JG |
1180 | stream_path, sizeof(stream_path)); |
1181 | if (ret < 0) { | |
1182 | goto end; | |
1183 | } | |
1184 | ||
1185 | if (stream->out_fd >= 0) { | |
1186 | ret = close(stream->out_fd); | |
1187 | if (ret < 0) { | |
1188 | PERROR("Failed to close stream file \"%s\"", | |
1189 | stream->name); | |
1190 | goto end; | |
1191 | } | |
1192 | stream->out_fd = -1; | |
2932b393 | 1193 | } |
d2956687 JG |
1194 | |
1195 | DBG("Opening stream output file \"%s\"", stream_path); | |
1196 | chunk_status = lttng_trace_chunk_open_file(stream->trace_chunk, stream_path, | |
3ff5c5db | 1197 | flags, mode, &stream->out_fd, false); |
2932b393 | 1198 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { |
d2956687 JG |
1199 | ERR("Failed to open stream file \"%s\"", stream->name); |
1200 | ret = -1; | |
1201 | goto end; | |
2932b393 | 1202 | } |
d2956687 JG |
1203 | |
1204 | if (!stream->metadata_flag && (create_index || stream->index_file)) { | |
1205 | if (stream->index_file) { | |
1206 | lttng_index_file_put(stream->index_file); | |
1207 | } | |
3ff5c5db | 1208 | chunk_status = lttng_index_file_create_from_trace_chunk( |
d2956687 JG |
1209 | stream->trace_chunk, |
1210 | stream->chan->pathname, | |
1211 | stream->name, | |
1212 | stream->chan->tracefile_size, | |
1213 | stream->tracefile_count_current, | |
1214 | CTF_INDEX_MAJOR, CTF_INDEX_MINOR, | |
3ff5c5db MD |
1215 | false, &stream->index_file); |
1216 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
d2956687 JG |
1217 | ret = -1; |
1218 | goto end; | |
1219 | } | |
1220 | } | |
1221 | ||
1222 | /* Reset current size because we just perform a rotation. */ | |
1223 | stream->tracefile_size_current = 0; | |
1224 | stream->out_fd_offset = 0; | |
1225 | end: | |
1226 | return ret; | |
1227 | } | |
1228 | ||
1229 | int consumer_stream_rotate_output_files(struct lttng_consumer_stream *stream) | |
1230 | { | |
1231 | int ret; | |
1232 | ||
1233 | stream->tracefile_count_current++; | |
1234 | if (stream->chan->tracefile_count > 0) { | |
1235 | stream->tracefile_count_current %= | |
1236 | stream->chan->tracefile_count; | |
1237 | } | |
1238 | ||
1239 | DBG("Rotating output files of stream \"%s\"", stream->name); | |
1240 | ret = consumer_stream_create_output_files(stream, true); | |
1241 | if (ret) { | |
1242 | goto end; | |
1243 | } | |
1244 | ||
1245 | end: | |
1246 | return ret; | |
1247 | } | |
cdb72e4e JG |
1248 | |
1249 | bool consumer_stream_is_deleted(struct lttng_consumer_stream *stream) | |
1250 | { | |
1251 | /* | |
1252 | * This function does not take a const stream since | |
1253 | * cds_lfht_is_node_deleted was not const before liburcu 0.12. | |
1254 | */ | |
a0377dfe | 1255 | LTTNG_ASSERT(stream); |
cdb72e4e JG |
1256 | return cds_lfht_is_node_deleted(&stream->node.node); |
1257 | } | |
f5ba75b4 JG |
1258 | |
1259 | static ssize_t metadata_bucket_flush( | |
1260 | const struct stream_subbuffer *buffer, void *data) | |
1261 | { | |
1262 | ssize_t ret; | |
97535efa | 1263 | struct lttng_consumer_stream *stream = (lttng_consumer_stream *) data; |
f5ba75b4 JG |
1264 | |
1265 | ret = consumer_stream_consume_mmap(NULL, stream, buffer); | |
1266 | if (ret < 0) { | |
1267 | goto end; | |
1268 | } | |
1269 | end: | |
1270 | return ret; | |
1271 | } | |
1272 | ||
1273 | static ssize_t metadata_bucket_consume( | |
1274 | struct lttng_consumer_local_data *unused, | |
1275 | struct lttng_consumer_stream *stream, | |
1276 | const struct stream_subbuffer *subbuffer) | |
1277 | { | |
1278 | ssize_t ret; | |
1279 | enum metadata_bucket_status status; | |
1280 | ||
1281 | status = metadata_bucket_fill(stream->metadata_bucket, subbuffer); | |
1282 | switch (status) { | |
1283 | case METADATA_BUCKET_STATUS_OK: | |
1284 | /* Return consumed size. */ | |
1285 | ret = subbuffer->buffer.buffer.size; | |
1286 | break; | |
1287 | default: | |
1288 | ret = -1; | |
1289 | } | |
1290 | ||
1291 | return ret; | |
1292 | } | |
1293 | ||
1294 | int consumer_stream_enable_metadata_bucketization( | |
1295 | struct lttng_consumer_stream *stream) | |
1296 | { | |
1297 | int ret = 0; | |
1298 | ||
a0377dfe FD |
1299 | LTTNG_ASSERT(stream->metadata_flag); |
1300 | LTTNG_ASSERT(!stream->metadata_bucket); | |
1301 | LTTNG_ASSERT(stream->chan->output == CONSUMER_CHANNEL_MMAP); | |
f5ba75b4 JG |
1302 | |
1303 | stream->metadata_bucket = metadata_bucket_create( | |
1304 | metadata_bucket_flush, stream); | |
1305 | if (!stream->metadata_bucket) { | |
1306 | ret = -1; | |
1307 | goto end; | |
1308 | } | |
1309 | ||
1310 | stream->read_subbuffer_ops.consume_subbuffer = metadata_bucket_consume; | |
1311 | end: | |
1312 | return ret; | |
1313 | } | |
55954e07 JG |
1314 | |
1315 | void consumer_stream_metadata_set_version( | |
1316 | struct lttng_consumer_stream *stream, uint64_t new_version) | |
1317 | { | |
a0377dfe | 1318 | LTTNG_ASSERT(new_version > stream->metadata_version); |
55954e07 JG |
1319 | stream->metadata_version = new_version; |
1320 | stream->reset_metadata_flag = 1; | |
1321 | ||
1322 | if (stream->metadata_bucket) { | |
1323 | metadata_bucket_reset(stream->metadata_bucket); | |
1324 | } | |
1325 | } | |
503fefca JG |
1326 | |
1327 | int consumer_stream_flush_buffer(struct lttng_consumer_stream *stream, | |
1328 | bool producer_active) | |
1329 | { | |
1330 | int ret = 0; | |
1331 | ||
fa29bfbf | 1332 | switch (the_consumer_data.type) { |
503fefca JG |
1333 | case LTTNG_CONSUMER_KERNEL: |
1334 | if (producer_active) { | |
1335 | ret = kernctl_buffer_flush(stream->wait_fd); | |
1336 | if (ret < 0) { | |
1337 | ERR("Failed to flush kernel stream"); | |
1338 | goto end; | |
1339 | } | |
1340 | } else { | |
1341 | ret = kernctl_buffer_flush_empty(stream->wait_fd); | |
1342 | if (ret < 0) { | |
1343 | /* | |
1344 | * Doing a buffer flush which does not take into | |
1345 | * account empty packets. This is not perfect, | |
1346 | * but required as a fall-back when | |
1347 | * "flush_empty" is not implemented by | |
1348 | * lttng-modules. | |
1349 | */ | |
1350 | ret = kernctl_buffer_flush(stream->wait_fd); | |
1351 | if (ret < 0) { | |
1352 | ERR("Failed to flush kernel stream"); | |
1353 | goto end; | |
1354 | } | |
1355 | } | |
1356 | } | |
1357 | break; | |
1358 | case LTTNG_CONSUMER32_UST: | |
1359 | case LTTNG_CONSUMER64_UST: | |
881fc67f | 1360 | ret = lttng_ustconsumer_flush_buffer(stream, (int) producer_active); |
503fefca JG |
1361 | break; |
1362 | default: | |
1363 | ERR("Unknown consumer_data type"); | |
1364 | abort(); | |
1365 | } | |
1366 | ||
1367 | end: | |
1368 | return ret; | |
1369 | } |