#include <common/relayd/relayd.h>
#include <common/ust-consumer/ust-consumer.h>
#include <common/utils.h>
+#include <common/consumer/consumer.h>
+#include <common/consumer/consumer-timer.h>
#include "consumer-stream.h"
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 =
+ LTTNG_OPTIONAL_GET(subbuf->info.data.sequence_number);
+
+ 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(
+ ctx, 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;
+
+ 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.
+ */
+ ret = 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.
+ */
+ ret = lttng_ustconsumer_sync_metadata(ctx, metadata);
+ break;
+ default:
+ assert(0);
+ ret = -1;
+ break;
+ }
+ /*
+ * Error or no new metadata, we exit here.
+ */
+ if (ret <= 0 || ret == ENODATA) {
+ goto end_unlock_mutex;
+ }
+
+ /*
+ * 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 (ret == EAGAIN);
+
+ /* 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");
+ stream->metadata_version = subbuffer->info.metadata.version;
+ stream->reset_metadata_flag = 1;
+
+ 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 <channel_name>_<cpu_number> */
+ 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.
return ret;
}
-/*
- * 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;
-
- 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.
- */
- ret = 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.
- */
- ret = lttng_ustconsumer_sync_metadata(ctx, metadata);
- break;
- default:
- assert(0);
- ret = -1;
- break;
- }
- /*
- * Error or no new metadata, we exit here.
- */
- if (ret <= 0 || ret == ENODATA) {
- goto end_unlock_mutex;
- }
-
- /*
- * 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 (ret == EAGAIN);
-
- /* 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;
-}
-
int consumer_stream_create_output_files(struct lttng_consumer_stream *stream,
bool create_index)
{
projects / lttng-tools.git / blobdiff