X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=src%2Fcommon%2Fconsumer%2Fconsumer-stream.c;h=be19c1bfd17a3bcf3526096f51ed389c387bd849;hb=HEAD;hp=fb878d72cabb6a56e4ff5a8a0d0303062a99d165;hpb=577eea73132dee4da47752590ed535206678eb34;p=lttng-tools.git diff --git a/src/common/consumer/consumer-stream.c b/src/common/consumer/consumer-stream.c deleted file mode 100644 index fb878d72c..000000000 --- a/src/common/consumer/consumer-stream.c +++ /dev/null @@ -1,1068 +0,0 @@ -/* - * Copyright (C) 2011 Julien Desfossez - * Copyright (C) 2011 Mathieu Desnoyers - * Copyright (C) 2013 David Goulet - * - * SPDX-License-Identifier: GPL-2.0-only - * - */ - -#define _LGPL_SOURCE -#include -#include -#include -#include - -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include "consumer-stream.h" - -/* - * RCU call to free stream. MUST only be used with call_rcu(). - */ -static void free_stream_rcu(struct rcu_head *head) -{ - struct lttng_ht_node_u64 *node = - caa_container_of(head, struct lttng_ht_node_u64, head); - struct lttng_consumer_stream *stream = - caa_container_of(node, struct lttng_consumer_stream, node); - - pthread_mutex_destroy(&stream->lock); - free(stream); -} - -static void consumer_stream_data_lock_all(struct lttng_consumer_stream *stream) -{ - pthread_mutex_lock(&stream->chan->lock); - pthread_mutex_lock(&stream->lock); -} - -static void consumer_stream_data_unlock_all(struct lttng_consumer_stream *stream) -{ - pthread_mutex_unlock(&stream->lock); - pthread_mutex_unlock(&stream->chan->lock); -} - -static void consumer_stream_metadata_lock_all(struct lttng_consumer_stream *stream) -{ - consumer_stream_data_lock_all(stream); - pthread_mutex_lock(&stream->metadata_rdv_lock); -} - -static void consumer_stream_metadata_unlock_all(struct lttng_consumer_stream *stream) -{ - pthread_mutex_unlock(&stream->metadata_rdv_lock); - consumer_stream_data_unlock_all(stream); -} - -/* Only used for data streams. */ -static int consumer_stream_update_stats(struct lttng_consumer_stream *stream, - const struct stream_subbuffer *subbuf) -{ - int ret = 0; - uint64_t sequence_number; - const uint64_t discarded_events = subbuf->info.data.events_discarded; - - if (!subbuf->info.data.sequence_number.is_set) { - /* Command not supported by the tracer. */ - sequence_number = -1ULL; - stream->sequence_number_unavailable = true; - } else { - sequence_number = subbuf->info.data.sequence_number.value; - } - - /* - * Start the sequence when we extract the first packet in case we don't - * start at 0 (for example if a consumer is not connected to the - * session immediately after the beginning). - */ - if (stream->last_sequence_number == -1ULL) { - stream->last_sequence_number = sequence_number; - } else if (sequence_number > stream->last_sequence_number) { - stream->chan->lost_packets += sequence_number - - stream->last_sequence_number - 1; - } else { - /* seq <= last_sequence_number */ - ERR("Sequence number inconsistent : prev = %" PRIu64 - ", current = %" PRIu64, - stream->last_sequence_number, sequence_number); - ret = -1; - goto end; - } - stream->last_sequence_number = sequence_number; - - if (discarded_events < stream->last_discarded_events) { - /* - * Overflow has occurred. We assume only one wrap-around - * has occurred. - */ - stream->chan->discarded_events += - (1ULL << (CAA_BITS_PER_LONG - 1)) - - stream->last_discarded_events + - discarded_events; - } else { - stream->chan->discarded_events += discarded_events - - stream->last_discarded_events; - } - stream->last_discarded_events = discarded_events; - ret = 0; - -end: - return ret; -} - -static -void ctf_packet_index_populate(struct ctf_packet_index *index, - off_t offset, const struct stream_subbuffer *subbuffer) -{ - *index = (typeof(*index)){ - .offset = htobe64(offset), - .packet_size = htobe64(subbuffer->info.data.packet_size), - .content_size = htobe64(subbuffer->info.data.content_size), - .timestamp_begin = htobe64( - subbuffer->info.data.timestamp_begin), - .timestamp_end = htobe64( - subbuffer->info.data.timestamp_end), - .events_discarded = htobe64( - subbuffer->info.data.events_discarded), - .stream_id = htobe64(subbuffer->info.data.stream_id), - .stream_instance_id = htobe64( - subbuffer->info.data.stream_instance_id.is_set ? - subbuffer->info.data.stream_instance_id.value : -1ULL), - .packet_seq_num = htobe64( - subbuffer->info.data.sequence_number.is_set ? - subbuffer->info.data.sequence_number.value : -1ULL), - }; -} - -static ssize_t consumer_stream_consume_mmap( - struct lttng_consumer_local_data *ctx, - struct lttng_consumer_stream *stream, - const struct stream_subbuffer *subbuffer) -{ - const unsigned long padding_size = - subbuffer->info.data.padded_subbuf_size - - subbuffer->info.data.subbuf_size; - - return lttng_consumer_on_read_subbuffer_mmap( - stream, &subbuffer->buffer.buffer, padding_size); -} - -static ssize_t consumer_stream_consume_splice( - struct lttng_consumer_local_data *ctx, - struct lttng_consumer_stream *stream, - const struct stream_subbuffer *subbuffer) -{ - return lttng_consumer_on_read_subbuffer_splice(ctx, stream, - subbuffer->info.data.padded_subbuf_size, 0); -} - -static int consumer_stream_send_index( - struct lttng_consumer_stream *stream, - const struct stream_subbuffer *subbuffer, - struct lttng_consumer_local_data *ctx) -{ - off_t packet_offset = 0; - struct ctf_packet_index index = {}; - - /* - * This is called after consuming the sub-buffer; substract the - * effect this sub-buffer from the offset. - */ - if (stream->net_seq_idx == (uint64_t) -1ULL) { - packet_offset = stream->out_fd_offset - - subbuffer->info.data.padded_subbuf_size; - } - - ctf_packet_index_populate(&index, packet_offset, subbuffer); - return consumer_stream_write_index(stream, &index); -} - -/* - * Actually do the metadata sync using the given metadata stream. - * - * Return 0 on success else a negative value. ENODATA can be returned also - * indicating that there is no metadata available for that stream. - */ -static int do_sync_metadata(struct lttng_consumer_stream *metadata, - struct lttng_consumer_local_data *ctx) -{ - int ret; - enum sync_metadata_status status; - - assert(metadata); - assert(metadata->metadata_flag); - assert(ctx); - - /* - * In UST, since we have to write the metadata from the cache packet - * by packet, we might need to start this procedure multiple times - * until all the metadata from the cache has been extracted. - */ - do { - /* - * Steps : - * - Lock the metadata stream - * - Check if metadata stream node was deleted before locking. - * - if yes, release and return success - * - Check if new metadata is ready (flush + snapshot pos) - * - If nothing : release and return. - * - Lock the metadata_rdv_lock - * - Unlock the metadata stream - * - cond_wait on metadata_rdv to wait the wakeup from the - * metadata thread - * - Unlock the metadata_rdv_lock - */ - pthread_mutex_lock(&metadata->lock); - - /* - * There is a possibility that we were able to acquire a reference on the - * stream from the RCU hash table but between then and now, the node might - * have been deleted just before the lock is acquired. Thus, after locking, - * we make sure the metadata node has not been deleted which means that the - * buffers are closed. - * - * In that case, there is no need to sync the metadata hence returning a - * success return code. - */ - ret = cds_lfht_is_node_deleted(&metadata->node.node); - if (ret) { - ret = 0; - goto end_unlock_mutex; - } - - switch (ctx->type) { - case LTTNG_CONSUMER_KERNEL: - /* - * Empty the metadata cache and flush the current stream. - */ - status = lttng_kconsumer_sync_metadata(metadata); - break; - case LTTNG_CONSUMER32_UST: - case LTTNG_CONSUMER64_UST: - /* - * Ask the sessiond if we have new metadata waiting and update the - * consumer metadata cache. - */ - status = lttng_ustconsumer_sync_metadata(ctx, metadata); - break; - default: - abort(); - } - - switch (status) { - case SYNC_METADATA_STATUS_NEW_DATA: - break; - case SYNC_METADATA_STATUS_NO_DATA: - ret = 0; - goto end_unlock_mutex; - case SYNC_METADATA_STATUS_ERROR: - ret = -1; - goto end_unlock_mutex; - default: - abort(); - } - - /* - * At this point, new metadata have been flushed, so we wait on the - * rendez-vous point for the metadata thread to wake us up when it - * finishes consuming the metadata and continue execution. - */ - - pthread_mutex_lock(&metadata->metadata_rdv_lock); - - /* - * Release metadata stream lock so the metadata thread can process it. - */ - pthread_mutex_unlock(&metadata->lock); - - /* - * Wait on the rendez-vous point. Once woken up, it means the metadata was - * consumed and thus synchronization is achieved. - */ - pthread_cond_wait(&metadata->metadata_rdv, &metadata->metadata_rdv_lock); - pthread_mutex_unlock(&metadata->metadata_rdv_lock); - } while (status == SYNC_METADATA_STATUS_NEW_DATA); - - /* Success */ - return 0; - -end_unlock_mutex: - pthread_mutex_unlock(&metadata->lock); - return ret; -} - -/* - * Synchronize the metadata using a given session ID. A successful acquisition - * of a metadata stream will trigger a request to the session daemon and a - * snapshot so the metadata thread can consume it. - * - * This function call is a rendez-vous point between the metadata thread and - * the data thread. - * - * Return 0 on success or else a negative value. - */ -int consumer_stream_sync_metadata(struct lttng_consumer_local_data *ctx, - uint64_t session_id) -{ - int ret; - struct lttng_consumer_stream *stream = NULL; - struct lttng_ht_iter iter; - struct lttng_ht *ht; - - assert(ctx); - - /* Ease our life a bit. */ - ht = consumer_data.stream_list_ht; - - rcu_read_lock(); - - /* Search the metadata associated with the session id of the given stream. */ - - cds_lfht_for_each_entry_duplicate(ht->ht, - ht->hash_fct(&session_id, lttng_ht_seed), ht->match_fct, - &session_id, &iter.iter, stream, node_session_id.node) { - if (!stream->metadata_flag) { - continue; - } - - ret = do_sync_metadata(stream, ctx); - if (ret < 0) { - goto end; - } - } - - /* - * Force return code to 0 (success) since ret might be ENODATA for instance - * which is not an error but rather that we should come back. - */ - ret = 0; - -end: - rcu_read_unlock(); - return ret; -} - -static int consumer_stream_sync_metadata_index( - struct lttng_consumer_stream *stream, - const struct stream_subbuffer *subbuffer, - struct lttng_consumer_local_data *ctx) -{ - int ret; - - /* Block until all the metadata is sent. */ - pthread_mutex_lock(&stream->metadata_timer_lock); - assert(!stream->missed_metadata_flush); - stream->waiting_on_metadata = true; - pthread_mutex_unlock(&stream->metadata_timer_lock); - - ret = consumer_stream_sync_metadata(ctx, stream->session_id); - - pthread_mutex_lock(&stream->metadata_timer_lock); - stream->waiting_on_metadata = false; - if (stream->missed_metadata_flush) { - stream->missed_metadata_flush = false; - pthread_mutex_unlock(&stream->metadata_timer_lock); - (void) stream->read_subbuffer_ops.send_live_beacon(stream); - } else { - pthread_mutex_unlock(&stream->metadata_timer_lock); - } - if (ret < 0) { - goto end; - } - - ret = consumer_stream_send_index(stream, subbuffer, ctx); -end: - return ret; -} - -/* - * Check if the local version of the metadata stream matches with the version - * of the metadata stream in the kernel. If it was updated, set the reset flag - * on the stream. - */ -static -int metadata_stream_check_version(struct lttng_consumer_stream *stream, - const struct stream_subbuffer *subbuffer) -{ - if (stream->metadata_version == subbuffer->info.metadata.version) { - goto end; - } - - DBG("New metadata version detected"); - consumer_stream_metadata_set_version(stream, - subbuffer->info.metadata.version); - - if (stream->read_subbuffer_ops.reset_metadata) { - stream->read_subbuffer_ops.reset_metadata(stream); - } - -end: - return 0; -} - -struct lttng_consumer_stream *consumer_stream_create( - struct lttng_consumer_channel *channel, - uint64_t channel_key, - uint64_t stream_key, - const char *channel_name, - uint64_t relayd_id, - uint64_t session_id, - struct lttng_trace_chunk *trace_chunk, - int cpu, - int *alloc_ret, - enum consumer_channel_type type, - unsigned int monitor) -{ - int ret; - struct lttng_consumer_stream *stream; - - stream = zmalloc(sizeof(*stream)); - if (stream == NULL) { - PERROR("malloc struct lttng_consumer_stream"); - ret = -ENOMEM; - goto end; - } - - if (trace_chunk && !lttng_trace_chunk_get(trace_chunk)) { - ERR("Failed to acquire trace chunk reference during the creation of a stream"); - ret = -1; - goto error; - } - - rcu_read_lock(); - stream->chan = channel; - stream->key = stream_key; - stream->trace_chunk = trace_chunk; - stream->out_fd = -1; - stream->out_fd_offset = 0; - stream->output_written = 0; - stream->net_seq_idx = relayd_id; - stream->session_id = session_id; - stream->monitor = monitor; - stream->endpoint_status = CONSUMER_ENDPOINT_ACTIVE; - stream->index_file = NULL; - stream->last_sequence_number = -1ULL; - stream->rotate_position = -1ULL; - pthread_mutex_init(&stream->lock, NULL); - pthread_mutex_init(&stream->metadata_timer_lock, NULL); - - /* If channel is the metadata, flag this stream as metadata. */ - if (type == CONSUMER_CHANNEL_TYPE_METADATA) { - stream->metadata_flag = 1; - /* Metadata is flat out. */ - strncpy(stream->name, DEFAULT_METADATA_NAME, sizeof(stream->name)); - /* Live rendez-vous point. */ - pthread_cond_init(&stream->metadata_rdv, NULL); - pthread_mutex_init(&stream->metadata_rdv_lock, NULL); - } else { - /* Format stream name to _ */ - ret = snprintf(stream->name, sizeof(stream->name), "%s_%d", - channel_name, cpu); - if (ret < 0) { - PERROR("snprintf stream name"); - goto error; - } - } - - switch (channel->output) { - case CONSUMER_CHANNEL_SPLICE: - stream->output = LTTNG_EVENT_SPLICE; - ret = utils_create_pipe(stream->splice_pipe); - if (ret < 0) { - goto error; - } - break; - case CONSUMER_CHANNEL_MMAP: - stream->output = LTTNG_EVENT_MMAP; - break; - default: - abort(); - } - - /* Key is always the wait_fd for streams. */ - lttng_ht_node_init_u64(&stream->node, stream->key); - - /* Init node per channel id key */ - lttng_ht_node_init_u64(&stream->node_channel_id, channel_key); - - /* Init session id node with the stream session id */ - lttng_ht_node_init_u64(&stream->node_session_id, stream->session_id); - - DBG3("Allocated stream %s (key %" PRIu64 ", chan_key %" PRIu64 - " relayd_id %" PRIu64 ", session_id %" PRIu64, - stream->name, stream->key, channel_key, - stream->net_seq_idx, stream->session_id); - - rcu_read_unlock(); - - if (type == CONSUMER_CHANNEL_TYPE_METADATA) { - stream->read_subbuffer_ops.lock = - consumer_stream_metadata_lock_all; - stream->read_subbuffer_ops.unlock = - consumer_stream_metadata_unlock_all; - stream->read_subbuffer_ops.pre_consume_subbuffer = - metadata_stream_check_version; - } else { - stream->read_subbuffer_ops.lock = consumer_stream_data_lock_all; - stream->read_subbuffer_ops.unlock = - consumer_stream_data_unlock_all; - stream->read_subbuffer_ops.pre_consume_subbuffer = - consumer_stream_update_stats; - if (channel->is_live) { - stream->read_subbuffer_ops.post_consume = - consumer_stream_sync_metadata_index; - } else { - stream->read_subbuffer_ops.post_consume = - consumer_stream_send_index; - } - } - - if (channel->output == CONSUMER_CHANNEL_MMAP) { - stream->read_subbuffer_ops.consume_subbuffer = - consumer_stream_consume_mmap; - } else { - stream->read_subbuffer_ops.consume_subbuffer = - consumer_stream_consume_splice; - } - - return stream; - -error: - rcu_read_unlock(); - lttng_trace_chunk_put(stream->trace_chunk); - free(stream); -end: - if (alloc_ret) { - *alloc_ret = ret; - } - return NULL; -} - -/* - * Close stream on the relayd side. This call can destroy a relayd if the - * conditions are met. - * - * A RCU read side lock MUST be acquired if the relayd object was looked up in - * a hash table before calling this. - */ -void consumer_stream_relayd_close(struct lttng_consumer_stream *stream, - struct consumer_relayd_sock_pair *relayd) -{ - int ret; - - assert(stream); - assert(relayd); - - if (stream->sent_to_relayd) { - uatomic_dec(&relayd->refcount); - assert(uatomic_read(&relayd->refcount) >= 0); - } - - /* Closing streams requires to lock the control socket. */ - pthread_mutex_lock(&relayd->ctrl_sock_mutex); - ret = relayd_send_close_stream(&relayd->control_sock, - stream->relayd_stream_id, - stream->next_net_seq_num - 1); - pthread_mutex_unlock(&relayd->ctrl_sock_mutex); - if (ret < 0) { - ERR("Relayd send close stream failed. Cleaning up relayd %" PRIu64 ".", relayd->net_seq_idx); - lttng_consumer_cleanup_relayd(relayd); - } - - /* Both conditions are met, we destroy the relayd. */ - if (uatomic_read(&relayd->refcount) == 0 && - uatomic_read(&relayd->destroy_flag)) { - consumer_destroy_relayd(relayd); - } - stream->net_seq_idx = (uint64_t) -1ULL; - stream->sent_to_relayd = 0; -} - -/* - * Close stream's file descriptors and, if needed, close stream also on the - * relayd side. - * - * The consumer data lock MUST be acquired. - * The stream lock MUST be acquired. - */ -void consumer_stream_close(struct lttng_consumer_stream *stream) -{ - int ret; - struct consumer_relayd_sock_pair *relayd; - - assert(stream); - - switch (consumer_data.type) { - case LTTNG_CONSUMER_KERNEL: - if (stream->mmap_base != NULL) { - ret = munmap(stream->mmap_base, stream->mmap_len); - if (ret != 0) { - PERROR("munmap"); - } - } - - if (stream->wait_fd >= 0) { - ret = close(stream->wait_fd); - if (ret) { - PERROR("close"); - } - stream->wait_fd = -1; - } - if (stream->chan->output == CONSUMER_CHANNEL_SPLICE) { - utils_close_pipe(stream->splice_pipe); - } - break; - case LTTNG_CONSUMER32_UST: - case LTTNG_CONSUMER64_UST: - { - /* - * Special case for the metadata since the wait fd is an internal pipe - * polled in the metadata thread. - */ - if (stream->metadata_flag && stream->chan->monitor) { - int rpipe = stream->ust_metadata_poll_pipe[0]; - - /* - * This will stop the channel timer if one and close the write side - * of the metadata poll pipe. - */ - lttng_ustconsumer_close_metadata(stream->chan); - if (rpipe >= 0) { - ret = close(rpipe); - if (ret < 0) { - PERROR("closing metadata pipe read side"); - } - stream->ust_metadata_poll_pipe[0] = -1; - } - } - break; - } - default: - ERR("Unknown consumer_data type"); - assert(0); - } - - /* Close output fd. Could be a socket or local file at this point. */ - if (stream->out_fd >= 0) { - ret = close(stream->out_fd); - if (ret) { - PERROR("close"); - } - stream->out_fd = -1; - } - - if (stream->index_file) { - lttng_index_file_put(stream->index_file); - stream->index_file = NULL; - } - - lttng_trace_chunk_put(stream->trace_chunk); - stream->trace_chunk = NULL; - - /* Check and cleanup relayd if needed. */ - rcu_read_lock(); - relayd = consumer_find_relayd(stream->net_seq_idx); - if (relayd != NULL) { - consumer_stream_relayd_close(stream, relayd); - } - rcu_read_unlock(); -} - -/* - * Delete the stream from all possible hash tables. - * - * The consumer data lock MUST be acquired. - * The stream lock MUST be acquired. - */ -void consumer_stream_delete(struct lttng_consumer_stream *stream, - struct lttng_ht *ht) -{ - int ret; - struct lttng_ht_iter iter; - - assert(stream); - /* Should NEVER be called not in monitor mode. */ - assert(stream->chan->monitor); - - rcu_read_lock(); - - if (ht) { - iter.iter.node = &stream->node.node; - ret = lttng_ht_del(ht, &iter); - assert(!ret); - } - - /* Delete from stream per channel ID hash table. */ - iter.iter.node = &stream->node_channel_id.node; - /* - * The returned value is of no importance. Even if the node is NOT in the - * hash table, we continue since we may have been called by a code path - * that did not add the stream to a (all) hash table. Same goes for the - * next call ht del call. - */ - (void) lttng_ht_del(consumer_data.stream_per_chan_id_ht, &iter); - - /* Delete from the global stream list. */ - iter.iter.node = &stream->node_session_id.node; - /* See the previous ht del on why we ignore the returned value. */ - (void) lttng_ht_del(consumer_data.stream_list_ht, &iter); - - rcu_read_unlock(); - - if (!stream->metadata_flag) { - /* Decrement the stream count of the global consumer data. */ - assert(consumer_data.stream_count > 0); - consumer_data.stream_count--; - } -} - -/* - * Free the given stream within a RCU call. - */ -void consumer_stream_free(struct lttng_consumer_stream *stream) -{ - assert(stream); - - metadata_bucket_destroy(stream->metadata_bucket); - call_rcu(&stream->node.head, free_stream_rcu); -} - -/* - * Destroy the stream's buffers of the tracer. - */ -void consumer_stream_destroy_buffers(struct lttng_consumer_stream *stream) -{ - assert(stream); - - switch (consumer_data.type) { - case LTTNG_CONSUMER_KERNEL: - break; - case LTTNG_CONSUMER32_UST: - case LTTNG_CONSUMER64_UST: - lttng_ustconsumer_del_stream(stream); - break; - default: - ERR("Unknown consumer_data type"); - assert(0); - } -} - -/* - * Destroy and close a already created stream. - */ -static void destroy_close_stream(struct lttng_consumer_stream *stream) -{ - assert(stream); - - DBG("Consumer stream destroy monitored key: %" PRIu64, stream->key); - - /* Destroy tracer buffers of the stream. */ - consumer_stream_destroy_buffers(stream); - /* Close down everything including the relayd if one. */ - consumer_stream_close(stream); -} - -/* - * Decrement the stream's channel refcount and if down to 0, return the channel - * pointer so it can be destroyed by the caller or NULL if not. - */ -static struct lttng_consumer_channel *unref_channel( - struct lttng_consumer_stream *stream) -{ - struct lttng_consumer_channel *free_chan = NULL; - - assert(stream); - assert(stream->chan); - - /* Update refcount of channel and see if we need to destroy it. */ - if (!uatomic_sub_return(&stream->chan->refcount, 1) - && !uatomic_read(&stream->chan->nb_init_stream_left)) { - free_chan = stream->chan; - } - - return free_chan; -} - -/* - * Destroy a stream completely. This will delete, close and free the stream. - * Once return, the stream is NO longer usable. Its channel may get destroyed - * if conditions are met for a monitored stream. - * - * This MUST be called WITHOUT the consumer data and stream lock acquired if - * the stream is in _monitor_ mode else it does not matter. - */ -void consumer_stream_destroy(struct lttng_consumer_stream *stream, - struct lttng_ht *ht) -{ - assert(stream); - - /* Stream is in monitor mode. */ - if (stream->monitor) { - struct lttng_consumer_channel *free_chan = NULL; - - /* - * This means that the stream was successfully removed from the streams - * list of the channel and sent to the right thread managing this - * stream thus being globally visible. - */ - if (stream->globally_visible) { - pthread_mutex_lock(&consumer_data.lock); - pthread_mutex_lock(&stream->chan->lock); - pthread_mutex_lock(&stream->lock); - /* Remove every reference of the stream in the consumer. */ - consumer_stream_delete(stream, ht); - - destroy_close_stream(stream); - - /* Update channel's refcount of the stream. */ - free_chan = unref_channel(stream); - - /* Indicates that the consumer data state MUST be updated after this. */ - consumer_data.need_update = 1; - - pthread_mutex_unlock(&stream->lock); - pthread_mutex_unlock(&stream->chan->lock); - pthread_mutex_unlock(&consumer_data.lock); - } else { - /* - * If the stream is not visible globally, this needs to be done - * outside of the consumer data lock section. - */ - free_chan = unref_channel(stream); - } - - if (free_chan) { - consumer_del_channel(free_chan); - } - } else { - destroy_close_stream(stream); - } - - /* Free stream within a RCU call. */ - lttng_trace_chunk_put(stream->trace_chunk); - stream->trace_chunk = NULL; - consumer_stream_free(stream); -} - -/* - * Write index of a specific stream either on the relayd or local disk. - * - * Return 0 on success or else a negative value. - */ -int consumer_stream_write_index(struct lttng_consumer_stream *stream, - struct ctf_packet_index *element) -{ - int ret; - - assert(stream); - assert(element); - - rcu_read_lock(); - if (stream->net_seq_idx != (uint64_t) -1ULL) { - struct consumer_relayd_sock_pair *relayd; - relayd = consumer_find_relayd(stream->net_seq_idx); - if (relayd) { - pthread_mutex_lock(&relayd->ctrl_sock_mutex); - ret = relayd_send_index(&relayd->control_sock, element, - stream->relayd_stream_id, stream->next_net_seq_num - 1); - if (ret < 0) { - /* - * Communication error with lttng-relayd, - * perform cleanup now - */ - ERR("Relayd send index failed. Cleaning up relayd %" PRIu64 ".", relayd->net_seq_idx); - lttng_consumer_cleanup_relayd(relayd); - ret = -1; - } - pthread_mutex_unlock(&relayd->ctrl_sock_mutex); - } else { - ERR("Stream %" PRIu64 " relayd ID %" PRIu64 " unknown. Can't write index.", - stream->key, stream->net_seq_idx); - ret = -1; - } - } else { - if (lttng_index_file_write(stream->index_file, element)) { - ret = -1; - } else { - ret = 0; - } - } - if (ret < 0) { - goto error; - } - -error: - rcu_read_unlock(); - return ret; -} - -int consumer_stream_create_output_files(struct lttng_consumer_stream *stream, - bool create_index) -{ - int ret; - enum lttng_trace_chunk_status chunk_status; - const int flags = O_WRONLY | O_CREAT | O_TRUNC; - const mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP; - char stream_path[LTTNG_PATH_MAX]; - - ASSERT_LOCKED(stream->lock); - assert(stream->trace_chunk); - - ret = utils_stream_file_path(stream->chan->pathname, stream->name, - stream->chan->tracefile_size, - stream->tracefile_count_current, NULL, - stream_path, sizeof(stream_path)); - if (ret < 0) { - goto end; - } - - if (stream->out_fd >= 0) { - ret = close(stream->out_fd); - if (ret < 0) { - PERROR("Failed to close stream file \"%s\"", - stream->name); - goto end; - } - stream->out_fd = -1; - } - - DBG("Opening stream output file \"%s\"", stream_path); - chunk_status = lttng_trace_chunk_open_file(stream->trace_chunk, stream_path, - flags, mode, &stream->out_fd, false); - if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { - ERR("Failed to open stream file \"%s\"", stream->name); - ret = -1; - goto end; - } - - if (!stream->metadata_flag && (create_index || stream->index_file)) { - if (stream->index_file) { - lttng_index_file_put(stream->index_file); - } - chunk_status = lttng_index_file_create_from_trace_chunk( - stream->trace_chunk, - stream->chan->pathname, - stream->name, - stream->chan->tracefile_size, - stream->tracefile_count_current, - CTF_INDEX_MAJOR, CTF_INDEX_MINOR, - false, &stream->index_file); - if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { - ret = -1; - goto end; - } - } - - /* Reset current size because we just perform a rotation. */ - stream->tracefile_size_current = 0; - stream->out_fd_offset = 0; -end: - return ret; -} - -int consumer_stream_rotate_output_files(struct lttng_consumer_stream *stream) -{ - int ret; - - stream->tracefile_count_current++; - if (stream->chan->tracefile_count > 0) { - stream->tracefile_count_current %= - stream->chan->tracefile_count; - } - - DBG("Rotating output files of stream \"%s\"", stream->name); - ret = consumer_stream_create_output_files(stream, true); - if (ret) { - goto end; - } - -end: - return ret; -} - -bool consumer_stream_is_deleted(struct lttng_consumer_stream *stream) -{ - /* - * This function does not take a const stream since - * cds_lfht_is_node_deleted was not const before liburcu 0.12. - */ - assert(stream); - return cds_lfht_is_node_deleted(&stream->node.node); -} - -static ssize_t metadata_bucket_flush( - const struct stream_subbuffer *buffer, void *data) -{ - ssize_t ret; - struct lttng_consumer_stream *stream = data; - - ret = consumer_stream_consume_mmap(NULL, stream, buffer); - if (ret < 0) { - goto end; - } -end: - return ret; -} - -static ssize_t metadata_bucket_consume( - struct lttng_consumer_local_data *unused, - struct lttng_consumer_stream *stream, - const struct stream_subbuffer *subbuffer) -{ - ssize_t ret; - enum metadata_bucket_status status; - - status = metadata_bucket_fill(stream->metadata_bucket, subbuffer); - switch (status) { - case METADATA_BUCKET_STATUS_OK: - /* Return consumed size. */ - ret = subbuffer->buffer.buffer.size; - break; - default: - ret = -1; - } - - return ret; -} - -int consumer_stream_enable_metadata_bucketization( - struct lttng_consumer_stream *stream) -{ - int ret = 0; - - assert(stream->metadata_flag); - assert(!stream->metadata_bucket); - assert(stream->chan->output == CONSUMER_CHANNEL_MMAP); - - stream->metadata_bucket = metadata_bucket_create( - metadata_bucket_flush, stream); - if (!stream->metadata_bucket) { - ret = -1; - goto end; - } - - stream->read_subbuffer_ops.consume_subbuffer = metadata_bucket_consume; -end: - return ret; -} - -void consumer_stream_metadata_set_version( - struct lttng_consumer_stream *stream, uint64_t new_version) -{ - assert(new_version > stream->metadata_version); - stream->metadata_version = new_version; - stream->reset_metadata_flag = 1; - - if (stream->metadata_bucket) { - metadata_bucket_reset(stream->metadata_bucket); - } -}