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