| 1 | /* |
| 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> |
| 5 | * |
| 6 | * SPDX-License-Identifier: GPL-2.0-only |
| 7 | * |
| 8 | */ |
| 9 | |
| 10 | #define _LGPL_SOURCE |
| 11 | #include <assert.h> |
| 12 | #include <inttypes.h> |
| 13 | #include <sys/mman.h> |
| 14 | #include <unistd.h> |
| 15 | |
| 16 | #include <common/common.h> |
| 17 | #include <common/index/index.h> |
| 18 | #include <common/kernel-consumer/kernel-consumer.h> |
| 19 | #include <common/relayd/relayd.h> |
| 20 | #include <common/ust-consumer/ust-consumer.h> |
| 21 | #include <common/utils.h> |
| 22 | |
| 23 | #include "consumer-stream.h" |
| 24 | |
| 25 | /* |
| 26 | * RCU call to free stream. MUST only be used with call_rcu(). |
| 27 | */ |
| 28 | static void free_stream_rcu(struct rcu_head *head) |
| 29 | { |
| 30 | struct lttng_ht_node_u64 *node = |
| 31 | caa_container_of(head, struct lttng_ht_node_u64, head); |
| 32 | struct lttng_consumer_stream *stream = |
| 33 | caa_container_of(node, struct lttng_consumer_stream, node); |
| 34 | |
| 35 | pthread_mutex_destroy(&stream->lock); |
| 36 | free(stream); |
| 37 | } |
| 38 | |
| 39 | /* |
| 40 | * Close stream on the relayd side. This call can destroy a relayd if the |
| 41 | * conditions are met. |
| 42 | * |
| 43 | * A RCU read side lock MUST be acquired if the relayd object was looked up in |
| 44 | * a hash table before calling this. |
| 45 | */ |
| 46 | void consumer_stream_relayd_close(struct lttng_consumer_stream *stream, |
| 47 | struct consumer_relayd_sock_pair *relayd) |
| 48 | { |
| 49 | int ret; |
| 50 | |
| 51 | assert(stream); |
| 52 | assert(relayd); |
| 53 | |
| 54 | if (stream->sent_to_relayd) { |
| 55 | uatomic_dec(&relayd->refcount); |
| 56 | assert(uatomic_read(&relayd->refcount) >= 0); |
| 57 | } |
| 58 | |
| 59 | /* Closing streams requires to lock the control socket. */ |
| 60 | pthread_mutex_lock(&relayd->ctrl_sock_mutex); |
| 61 | ret = relayd_send_close_stream(&relayd->control_sock, |
| 62 | stream->relayd_stream_id, |
| 63 | stream->next_net_seq_num - 1); |
| 64 | pthread_mutex_unlock(&relayd->ctrl_sock_mutex); |
| 65 | if (ret < 0) { |
| 66 | ERR("Relayd send close stream failed. Cleaning up relayd %" PRIu64 ".", relayd->net_seq_idx); |
| 67 | lttng_consumer_cleanup_relayd(relayd); |
| 68 | } |
| 69 | |
| 70 | /* Both conditions are met, we destroy the relayd. */ |
| 71 | if (uatomic_read(&relayd->refcount) == 0 && |
| 72 | uatomic_read(&relayd->destroy_flag)) { |
| 73 | consumer_destroy_relayd(relayd); |
| 74 | } |
| 75 | stream->net_seq_idx = (uint64_t) -1ULL; |
| 76 | stream->sent_to_relayd = 0; |
| 77 | } |
| 78 | |
| 79 | /* |
| 80 | * Close stream's file descriptors and, if needed, close stream also on the |
| 81 | * relayd side. |
| 82 | * |
| 83 | * The consumer data lock MUST be acquired. |
| 84 | * The stream lock MUST be acquired. |
| 85 | */ |
| 86 | void consumer_stream_close(struct lttng_consumer_stream *stream) |
| 87 | { |
| 88 | int ret; |
| 89 | struct consumer_relayd_sock_pair *relayd; |
| 90 | |
| 91 | assert(stream); |
| 92 | |
| 93 | switch (consumer_data.type) { |
| 94 | case LTTNG_CONSUMER_KERNEL: |
| 95 | if (stream->mmap_base != NULL) { |
| 96 | ret = munmap(stream->mmap_base, stream->mmap_len); |
| 97 | if (ret != 0) { |
| 98 | PERROR("munmap"); |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | if (stream->wait_fd >= 0) { |
| 103 | ret = close(stream->wait_fd); |
| 104 | if (ret) { |
| 105 | PERROR("close"); |
| 106 | } |
| 107 | stream->wait_fd = -1; |
| 108 | } |
| 109 | if (stream->chan->output == CONSUMER_CHANNEL_SPLICE) { |
| 110 | utils_close_pipe(stream->splice_pipe); |
| 111 | } |
| 112 | break; |
| 113 | case LTTNG_CONSUMER32_UST: |
| 114 | case LTTNG_CONSUMER64_UST: |
| 115 | { |
| 116 | /* |
| 117 | * Special case for the metadata since the wait fd is an internal pipe |
| 118 | * polled in the metadata thread. |
| 119 | */ |
| 120 | if (stream->metadata_flag && stream->chan->monitor) { |
| 121 | int rpipe = stream->ust_metadata_poll_pipe[0]; |
| 122 | |
| 123 | /* |
| 124 | * This will stop the channel timer if one and close the write side |
| 125 | * of the metadata poll pipe. |
| 126 | */ |
| 127 | lttng_ustconsumer_close_metadata(stream->chan); |
| 128 | if (rpipe >= 0) { |
| 129 | ret = close(rpipe); |
| 130 | if (ret < 0) { |
| 131 | PERROR("closing metadata pipe read side"); |
| 132 | } |
| 133 | stream->ust_metadata_poll_pipe[0] = -1; |
| 134 | } |
| 135 | } |
| 136 | break; |
| 137 | } |
| 138 | default: |
| 139 | ERR("Unknown consumer_data type"); |
| 140 | assert(0); |
| 141 | } |
| 142 | |
| 143 | /* Close output fd. Could be a socket or local file at this point. */ |
| 144 | if (stream->out_fd >= 0) { |
| 145 | ret = close(stream->out_fd); |
| 146 | if (ret) { |
| 147 | PERROR("close"); |
| 148 | } |
| 149 | stream->out_fd = -1; |
| 150 | } |
| 151 | |
| 152 | if (stream->index_file) { |
| 153 | lttng_index_file_put(stream->index_file); |
| 154 | stream->index_file = NULL; |
| 155 | } |
| 156 | |
| 157 | lttng_trace_chunk_put(stream->trace_chunk); |
| 158 | stream->trace_chunk = NULL; |
| 159 | |
| 160 | /* Check and cleanup relayd if needed. */ |
| 161 | rcu_read_lock(); |
| 162 | relayd = consumer_find_relayd(stream->net_seq_idx); |
| 163 | if (relayd != NULL) { |
| 164 | consumer_stream_relayd_close(stream, relayd); |
| 165 | } |
| 166 | rcu_read_unlock(); |
| 167 | } |
| 168 | |
| 169 | /* |
| 170 | * Delete the stream from all possible hash tables. |
| 171 | * |
| 172 | * The consumer data lock MUST be acquired. |
| 173 | * The stream lock MUST be acquired. |
| 174 | */ |
| 175 | void consumer_stream_delete(struct lttng_consumer_stream *stream, |
| 176 | struct lttng_ht *ht) |
| 177 | { |
| 178 | int ret; |
| 179 | struct lttng_ht_iter iter; |
| 180 | |
| 181 | assert(stream); |
| 182 | /* Should NEVER be called not in monitor mode. */ |
| 183 | assert(stream->chan->monitor); |
| 184 | |
| 185 | rcu_read_lock(); |
| 186 | |
| 187 | if (ht) { |
| 188 | iter.iter.node = &stream->node.node; |
| 189 | ret = lttng_ht_del(ht, &iter); |
| 190 | assert(!ret); |
| 191 | } |
| 192 | |
| 193 | /* Delete from stream per channel ID hash table. */ |
| 194 | iter.iter.node = &stream->node_channel_id.node; |
| 195 | /* |
| 196 | * The returned value is of no importance. Even if the node is NOT in the |
| 197 | * hash table, we continue since we may have been called by a code path |
| 198 | * that did not add the stream to a (all) hash table. Same goes for the |
| 199 | * next call ht del call. |
| 200 | */ |
| 201 | (void) lttng_ht_del(consumer_data.stream_per_chan_id_ht, &iter); |
| 202 | |
| 203 | /* Delete from the global stream list. */ |
| 204 | iter.iter.node = &stream->node_session_id.node; |
| 205 | /* See the previous ht del on why we ignore the returned value. */ |
| 206 | (void) lttng_ht_del(consumer_data.stream_list_ht, &iter); |
| 207 | |
| 208 | rcu_read_unlock(); |
| 209 | |
| 210 | if (!stream->metadata_flag) { |
| 211 | /* Decrement the stream count of the global consumer data. */ |
| 212 | assert(consumer_data.stream_count > 0); |
| 213 | consumer_data.stream_count--; |
| 214 | } |
| 215 | } |
| 216 | |
| 217 | /* |
| 218 | * Free the given stream within a RCU call. |
| 219 | */ |
| 220 | void consumer_stream_free(struct lttng_consumer_stream *stream) |
| 221 | { |
| 222 | assert(stream); |
| 223 | |
| 224 | call_rcu(&stream->node.head, free_stream_rcu); |
| 225 | } |
| 226 | |
| 227 | /* |
| 228 | * Destroy the stream's buffers of the tracer. |
| 229 | */ |
| 230 | void consumer_stream_destroy_buffers(struct lttng_consumer_stream *stream) |
| 231 | { |
| 232 | assert(stream); |
| 233 | |
| 234 | switch (consumer_data.type) { |
| 235 | case LTTNG_CONSUMER_KERNEL: |
| 236 | break; |
| 237 | case LTTNG_CONSUMER32_UST: |
| 238 | case LTTNG_CONSUMER64_UST: |
| 239 | lttng_ustconsumer_del_stream(stream); |
| 240 | break; |
| 241 | default: |
| 242 | ERR("Unknown consumer_data type"); |
| 243 | assert(0); |
| 244 | } |
| 245 | } |
| 246 | |
| 247 | /* |
| 248 | * Destroy and close a already created stream. |
| 249 | */ |
| 250 | static void destroy_close_stream(struct lttng_consumer_stream *stream) |
| 251 | { |
| 252 | assert(stream); |
| 253 | |
| 254 | DBG("Consumer stream destroy monitored key: %" PRIu64, stream->key); |
| 255 | |
| 256 | /* Destroy tracer buffers of the stream. */ |
| 257 | consumer_stream_destroy_buffers(stream); |
| 258 | /* Close down everything including the relayd if one. */ |
| 259 | consumer_stream_close(stream); |
| 260 | } |
| 261 | |
| 262 | /* |
| 263 | * Decrement the stream's channel refcount and if down to 0, return the channel |
| 264 | * pointer so it can be destroyed by the caller or NULL if not. |
| 265 | */ |
| 266 | static struct lttng_consumer_channel *unref_channel( |
| 267 | struct lttng_consumer_stream *stream) |
| 268 | { |
| 269 | struct lttng_consumer_channel *free_chan = NULL; |
| 270 | |
| 271 | assert(stream); |
| 272 | assert(stream->chan); |
| 273 | |
| 274 | /* Update refcount of channel and see if we need to destroy it. */ |
| 275 | if (!uatomic_sub_return(&stream->chan->refcount, 1) |
| 276 | && !uatomic_read(&stream->chan->nb_init_stream_left)) { |
| 277 | free_chan = stream->chan; |
| 278 | } |
| 279 | |
| 280 | return free_chan; |
| 281 | } |
| 282 | |
| 283 | /* |
| 284 | * Destroy a stream completely. This will delete, close and free the stream. |
| 285 | * Once return, the stream is NO longer usable. Its channel may get destroyed |
| 286 | * if conditions are met for a monitored stream. |
| 287 | * |
| 288 | * This MUST be called WITHOUT the consumer data and stream lock acquired if |
| 289 | * the stream is in _monitor_ mode else it does not matter. |
| 290 | */ |
| 291 | void consumer_stream_destroy(struct lttng_consumer_stream *stream, |
| 292 | struct lttng_ht *ht) |
| 293 | { |
| 294 | assert(stream); |
| 295 | |
| 296 | /* Stream is in monitor mode. */ |
| 297 | if (stream->monitor) { |
| 298 | struct lttng_consumer_channel *free_chan = NULL; |
| 299 | |
| 300 | /* |
| 301 | * This means that the stream was successfully removed from the streams |
| 302 | * list of the channel and sent to the right thread managing this |
| 303 | * stream thus being globally visible. |
| 304 | */ |
| 305 | if (stream->globally_visible) { |
| 306 | pthread_mutex_lock(&consumer_data.lock); |
| 307 | pthread_mutex_lock(&stream->chan->lock); |
| 308 | pthread_mutex_lock(&stream->lock); |
| 309 | /* Remove every reference of the stream in the consumer. */ |
| 310 | consumer_stream_delete(stream, ht); |
| 311 | |
| 312 | destroy_close_stream(stream); |
| 313 | |
| 314 | /* Update channel's refcount of the stream. */ |
| 315 | free_chan = unref_channel(stream); |
| 316 | |
| 317 | /* Indicates that the consumer data state MUST be updated after this. */ |
| 318 | consumer_data.need_update = 1; |
| 319 | |
| 320 | pthread_mutex_unlock(&stream->lock); |
| 321 | pthread_mutex_unlock(&stream->chan->lock); |
| 322 | pthread_mutex_unlock(&consumer_data.lock); |
| 323 | } else { |
| 324 | /* |
| 325 | * If the stream is not visible globally, this needs to be done |
| 326 | * outside of the consumer data lock section. |
| 327 | */ |
| 328 | free_chan = unref_channel(stream); |
| 329 | } |
| 330 | |
| 331 | if (free_chan) { |
| 332 | consumer_del_channel(free_chan); |
| 333 | } |
| 334 | } else { |
| 335 | destroy_close_stream(stream); |
| 336 | } |
| 337 | |
| 338 | /* Free stream within a RCU call. */ |
| 339 | lttng_trace_chunk_put(stream->trace_chunk); |
| 340 | stream->trace_chunk = NULL; |
| 341 | consumer_stream_free(stream); |
| 342 | } |
| 343 | |
| 344 | /* |
| 345 | * Write index of a specific stream either on the relayd or local disk. |
| 346 | * |
| 347 | * Return 0 on success or else a negative value. |
| 348 | */ |
| 349 | int consumer_stream_write_index(struct lttng_consumer_stream *stream, |
| 350 | struct ctf_packet_index *element) |
| 351 | { |
| 352 | int ret; |
| 353 | |
| 354 | assert(stream); |
| 355 | assert(element); |
| 356 | |
| 357 | rcu_read_lock(); |
| 358 | if (stream->net_seq_idx != (uint64_t) -1ULL) { |
| 359 | struct consumer_relayd_sock_pair *relayd; |
| 360 | relayd = consumer_find_relayd(stream->net_seq_idx); |
| 361 | if (relayd) { |
| 362 | pthread_mutex_lock(&relayd->ctrl_sock_mutex); |
| 363 | ret = relayd_send_index(&relayd->control_sock, element, |
| 364 | stream->relayd_stream_id, stream->next_net_seq_num - 1); |
| 365 | if (ret < 0) { |
| 366 | /* |
| 367 | * Communication error with lttng-relayd, |
| 368 | * perform cleanup now |
| 369 | */ |
| 370 | ERR("Relayd send index failed. Cleaning up relayd %" PRIu64 ".", relayd->net_seq_idx); |
| 371 | lttng_consumer_cleanup_relayd(relayd); |
| 372 | ret = -1; |
| 373 | } |
| 374 | pthread_mutex_unlock(&relayd->ctrl_sock_mutex); |
| 375 | } else { |
| 376 | ERR("Stream %" PRIu64 " relayd ID %" PRIu64 " unknown. Can't write index.", |
| 377 | stream->key, stream->net_seq_idx); |
| 378 | ret = -1; |
| 379 | } |
| 380 | } else { |
| 381 | if (lttng_index_file_write(stream->index_file, element)) { |
| 382 | ret = -1; |
| 383 | } else { |
| 384 | ret = 0; |
| 385 | } |
| 386 | } |
| 387 | if (ret < 0) { |
| 388 | goto error; |
| 389 | } |
| 390 | |
| 391 | error: |
| 392 | rcu_read_unlock(); |
| 393 | return ret; |
| 394 | } |
| 395 | |
| 396 | /* |
| 397 | * Actually do the metadata sync using the given metadata stream. |
| 398 | * |
| 399 | * Return 0 on success else a negative value. ENODATA can be returned also |
| 400 | * indicating that there is no metadata available for that stream. |
| 401 | */ |
| 402 | static int do_sync_metadata(struct lttng_consumer_stream *metadata, |
| 403 | struct lttng_consumer_local_data *ctx) |
| 404 | { |
| 405 | int ret; |
| 406 | |
| 407 | assert(metadata); |
| 408 | assert(metadata->metadata_flag); |
| 409 | assert(ctx); |
| 410 | |
| 411 | /* |
| 412 | * In UST, since we have to write the metadata from the cache packet |
| 413 | * by packet, we might need to start this procedure multiple times |
| 414 | * until all the metadata from the cache has been extracted. |
| 415 | */ |
| 416 | do { |
| 417 | /* |
| 418 | * Steps : |
| 419 | * - Lock the metadata stream |
| 420 | * - Check if metadata stream node was deleted before locking. |
| 421 | * - if yes, release and return success |
| 422 | * - Check if new metadata is ready (flush + snapshot pos) |
| 423 | * - If nothing : release and return. |
| 424 | * - Lock the metadata_rdv_lock |
| 425 | * - Unlock the metadata stream |
| 426 | * - cond_wait on metadata_rdv to wait the wakeup from the |
| 427 | * metadata thread |
| 428 | * - Unlock the metadata_rdv_lock |
| 429 | */ |
| 430 | pthread_mutex_lock(&metadata->lock); |
| 431 | |
| 432 | /* |
| 433 | * There is a possibility that we were able to acquire a reference on the |
| 434 | * stream from the RCU hash table but between then and now, the node might |
| 435 | * have been deleted just before the lock is acquired. Thus, after locking, |
| 436 | * we make sure the metadata node has not been deleted which means that the |
| 437 | * buffers are closed. |
| 438 | * |
| 439 | * In that case, there is no need to sync the metadata hence returning a |
| 440 | * success return code. |
| 441 | */ |
| 442 | ret = cds_lfht_is_node_deleted(&metadata->node.node); |
| 443 | if (ret) { |
| 444 | ret = 0; |
| 445 | goto end_unlock_mutex; |
| 446 | } |
| 447 | |
| 448 | switch (ctx->type) { |
| 449 | case LTTNG_CONSUMER_KERNEL: |
| 450 | /* |
| 451 | * Empty the metadata cache and flush the current stream. |
| 452 | */ |
| 453 | ret = lttng_kconsumer_sync_metadata(metadata); |
| 454 | break; |
| 455 | case LTTNG_CONSUMER32_UST: |
| 456 | case LTTNG_CONSUMER64_UST: |
| 457 | /* |
| 458 | * Ask the sessiond if we have new metadata waiting and update the |
| 459 | * consumer metadata cache. |
| 460 | */ |
| 461 | ret = lttng_ustconsumer_sync_metadata(ctx, metadata); |
| 462 | break; |
| 463 | default: |
| 464 | assert(0); |
| 465 | ret = -1; |
| 466 | break; |
| 467 | } |
| 468 | /* |
| 469 | * Error or no new metadata, we exit here. |
| 470 | */ |
| 471 | if (ret <= 0 || ret == ENODATA) { |
| 472 | goto end_unlock_mutex; |
| 473 | } |
| 474 | |
| 475 | /* |
| 476 | * At this point, new metadata have been flushed, so we wait on the |
| 477 | * rendez-vous point for the metadata thread to wake us up when it |
| 478 | * finishes consuming the metadata and continue execution. |
| 479 | */ |
| 480 | |
| 481 | pthread_mutex_lock(&metadata->metadata_rdv_lock); |
| 482 | |
| 483 | /* |
| 484 | * Release metadata stream lock so the metadata thread can process it. |
| 485 | */ |
| 486 | pthread_mutex_unlock(&metadata->lock); |
| 487 | |
| 488 | /* |
| 489 | * Wait on the rendez-vous point. Once woken up, it means the metadata was |
| 490 | * consumed and thus synchronization is achieved. |
| 491 | */ |
| 492 | pthread_cond_wait(&metadata->metadata_rdv, &metadata->metadata_rdv_lock); |
| 493 | pthread_mutex_unlock(&metadata->metadata_rdv_lock); |
| 494 | } while (ret == EAGAIN); |
| 495 | |
| 496 | /* Success */ |
| 497 | return 0; |
| 498 | |
| 499 | end_unlock_mutex: |
| 500 | pthread_mutex_unlock(&metadata->lock); |
| 501 | return ret; |
| 502 | } |
| 503 | |
| 504 | /* |
| 505 | * Synchronize the metadata using a given session ID. A successful acquisition |
| 506 | * of a metadata stream will trigger a request to the session daemon and a |
| 507 | * snapshot so the metadata thread can consume it. |
| 508 | * |
| 509 | * This function call is a rendez-vous point between the metadata thread and |
| 510 | * the data thread. |
| 511 | * |
| 512 | * Return 0 on success or else a negative value. |
| 513 | */ |
| 514 | int consumer_stream_sync_metadata(struct lttng_consumer_local_data *ctx, |
| 515 | uint64_t session_id) |
| 516 | { |
| 517 | int ret; |
| 518 | struct lttng_consumer_stream *stream = NULL; |
| 519 | struct lttng_ht_iter iter; |
| 520 | struct lttng_ht *ht; |
| 521 | |
| 522 | assert(ctx); |
| 523 | |
| 524 | /* Ease our life a bit. */ |
| 525 | ht = consumer_data.stream_list_ht; |
| 526 | |
| 527 | rcu_read_lock(); |
| 528 | |
| 529 | /* Search the metadata associated with the session id of the given stream. */ |
| 530 | |
| 531 | cds_lfht_for_each_entry_duplicate(ht->ht, |
| 532 | ht->hash_fct(&session_id, lttng_ht_seed), ht->match_fct, |
| 533 | &session_id, &iter.iter, stream, node_session_id.node) { |
| 534 | if (!stream->metadata_flag) { |
| 535 | continue; |
| 536 | } |
| 537 | |
| 538 | ret = do_sync_metadata(stream, ctx); |
| 539 | if (ret < 0) { |
| 540 | goto end; |
| 541 | } |
| 542 | } |
| 543 | |
| 544 | /* |
| 545 | * Force return code to 0 (success) since ret might be ENODATA for instance |
| 546 | * which is not an error but rather that we should come back. |
| 547 | */ |
| 548 | ret = 0; |
| 549 | |
| 550 | end: |
| 551 | rcu_read_unlock(); |
| 552 | return ret; |
| 553 | } |
| 554 | |
| 555 | int consumer_stream_create_output_files(struct lttng_consumer_stream *stream, |
| 556 | bool create_index) |
| 557 | { |
| 558 | int ret; |
| 559 | enum lttng_trace_chunk_status chunk_status; |
| 560 | const int flags = O_WRONLY | O_CREAT | O_TRUNC; |
| 561 | const mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP; |
| 562 | char stream_path[LTTNG_PATH_MAX]; |
| 563 | |
| 564 | ASSERT_LOCKED(stream->lock); |
| 565 | assert(stream->trace_chunk); |
| 566 | |
| 567 | ret = utils_stream_file_path(stream->chan->pathname, stream->name, |
| 568 | stream->chan->tracefile_size, |
| 569 | stream->tracefile_count_current, NULL, |
| 570 | stream_path, sizeof(stream_path)); |
| 571 | if (ret < 0) { |
| 572 | goto end; |
| 573 | } |
| 574 | |
| 575 | if (stream->out_fd >= 0) { |
| 576 | ret = close(stream->out_fd); |
| 577 | if (ret < 0) { |
| 578 | PERROR("Failed to close stream file \"%s\"", |
| 579 | stream->name); |
| 580 | goto end; |
| 581 | } |
| 582 | stream->out_fd = -1; |
| 583 | } |
| 584 | |
| 585 | DBG("Opening stream output file \"%s\"", stream_path); |
| 586 | chunk_status = lttng_trace_chunk_open_file(stream->trace_chunk, stream_path, |
| 587 | flags, mode, &stream->out_fd, false); |
| 588 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { |
| 589 | ERR("Failed to open stream file \"%s\"", stream->name); |
| 590 | ret = -1; |
| 591 | goto end; |
| 592 | } |
| 593 | |
| 594 | if (!stream->metadata_flag && (create_index || stream->index_file)) { |
| 595 | if (stream->index_file) { |
| 596 | lttng_index_file_put(stream->index_file); |
| 597 | } |
| 598 | chunk_status = lttng_index_file_create_from_trace_chunk( |
| 599 | stream->trace_chunk, |
| 600 | stream->chan->pathname, |
| 601 | stream->name, |
| 602 | stream->chan->tracefile_size, |
| 603 | stream->tracefile_count_current, |
| 604 | CTF_INDEX_MAJOR, CTF_INDEX_MINOR, |
| 605 | false, &stream->index_file); |
| 606 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { |
| 607 | ret = -1; |
| 608 | goto end; |
| 609 | } |
| 610 | } |
| 611 | |
| 612 | /* Reset current size because we just perform a rotation. */ |
| 613 | stream->tracefile_size_current = 0; |
| 614 | stream->out_fd_offset = 0; |
| 615 | end: |
| 616 | return ret; |
| 617 | } |
| 618 | |
| 619 | int consumer_stream_rotate_output_files(struct lttng_consumer_stream *stream) |
| 620 | { |
| 621 | int ret; |
| 622 | |
| 623 | stream->tracefile_count_current++; |
| 624 | if (stream->chan->tracefile_count > 0) { |
| 625 | stream->tracefile_count_current %= |
| 626 | stream->chan->tracefile_count; |
| 627 | } |
| 628 | |
| 629 | DBG("Rotating output files of stream \"%s\"", stream->name); |
| 630 | ret = consumer_stream_create_output_files(stream, true); |
| 631 | if (ret) { |
| 632 | goto end; |
| 633 | } |
| 634 | |
| 635 | end: |
| 636 | return ret; |
| 637 | } |
| 638 | |
| 639 | bool consumer_stream_is_deleted(struct lttng_consumer_stream *stream) |
| 640 | { |
| 641 | /* |
| 642 | * This function does not take a const stream since |
| 643 | * cds_lfht_is_node_deleted was not const before liburcu 0.12. |
| 644 | */ |
| 645 | assert(stream); |
| 646 | return cds_lfht_is_node_deleted(&stream->node.node); |
| 647 | } |