X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fcommon%2Fconsumer.c;h=94a0cc3efb1d557da732ed9a201848b0ee4dc3e4;hp=bcede1ef5d8f3857515baeaf709ad9b78294a684;hb=774d490c42598710944f54a53d81d1cab2a1dfaa;hpb=30319bcbeabf573068172289850aea0bcfe23abc

diff --git a/src/common/consumer.c b/src/common/consumer.c
index bcede1ef5..94a0cc3ef 100644
--- a/src/common/consumer.c
+++ b/src/common/consumer.c
@@ -291,6 +291,7 @@ void consumer_del_channel(struct lttng_consumer_channel *channel)
 	DBG("Consumer delete channel key %" PRIu64, channel->key);
 
 	pthread_mutex_lock(&consumer_data.lock);
+	pthread_mutex_lock(&channel->lock);
 
 	/* Delete streams that might have been left in the stream list. */
 	cds_list_for_each_entry_safe(stream, stmp, &channel->streams.head,
@@ -324,6 +325,7 @@ void consumer_del_channel(struct lttng_consumer_channel *channel)
 
 	call_rcu(&channel->node.head, free_channel_rcu);
 end:
+	pthread_mutex_unlock(&channel->lock);
 	pthread_mutex_unlock(&consumer_data.lock);
 }
 
@@ -489,6 +491,7 @@ struct lttng_consumer_stream *consumer_allocate_stream(uint64_t channel_key,
 	stream->net_seq_idx = relayd_id;
 	stream->session_id = session_id;
 	stream->monitor = monitor;
+	stream->endpoint_status = CONSUMER_ENDPOINT_ACTIVE;
 	pthread_mutex_init(&stream->lock, NULL);
 
 	/* If channel is the metadata, flag this stream as metadata. */
@@ -547,6 +550,7 @@ static int add_stream(struct lttng_consumer_stream *stream,
 	DBG3("Adding consumer stream %" PRIu64, stream->key);
 
 	pthread_mutex_lock(&consumer_data.lock);
+	pthread_mutex_lock(&stream->chan->lock);
 	pthread_mutex_lock(&stream->lock);
 	rcu_read_lock();
 
@@ -584,6 +588,7 @@ static int add_stream(struct lttng_consumer_stream *stream,
 
 	rcu_read_unlock();
 	pthread_mutex_unlock(&stream->lock);
+	pthread_mutex_unlock(&stream->chan->lock);
 	pthread_mutex_unlock(&consumer_data.lock);
 
 	return ret;
@@ -832,6 +837,7 @@ struct lttng_consumer_channel *consumer_allocate_channel(uint64_t key,
 	channel->tracefile_size = tracefile_size;
 	channel->tracefile_count = tracefile_count;
 	channel->monitor = monitor;
+	pthread_mutex_init(&channel->lock, NULL);
 
 	/*
 	 * In monitor mode, the streams associated with the channel will be put in
@@ -877,6 +883,7 @@ int consumer_add_channel(struct lttng_consumer_channel *channel,
 	struct lttng_ht_iter iter;
 
 	pthread_mutex_lock(&consumer_data.lock);
+	pthread_mutex_lock(&channel->lock);
 	rcu_read_lock();
 
 	lttng_ht_lookup(consumer_data.channel_ht, &channel->key, &iter);
@@ -893,6 +900,7 @@ int consumer_add_channel(struct lttng_consumer_channel *channel,
 
 end:
 	rcu_read_unlock();
+	pthread_mutex_unlock(&channel->lock);
 	pthread_mutex_unlock(&consumer_data.lock);
 
 	if (!ret && channel->wait_fd != -1 &&
@@ -1852,6 +1860,7 @@ void consumer_del_metadata_stream(struct lttng_consumer_stream *stream,
 	}
 
 	pthread_mutex_lock(&consumer_data.lock);
+	pthread_mutex_lock(&stream->chan->lock);
 	pthread_mutex_lock(&stream->lock);
 
 	switch (consumer_data.type) {
@@ -1945,6 +1954,7 @@ end:
 	stream->chan->metadata_stream = NULL;
 
 	pthread_mutex_unlock(&stream->lock);
+	pthread_mutex_unlock(&stream->chan->lock);
 	pthread_mutex_unlock(&consumer_data.lock);
 
 	if (free_chan) {
@@ -1972,6 +1982,7 @@ static int add_metadata_stream(struct lttng_consumer_stream *stream,
 	DBG3("Adding metadata stream %" PRIu64 " to hash table", stream->key);
 
 	pthread_mutex_lock(&consumer_data.lock);
+	pthread_mutex_lock(&stream->chan->lock);
 	pthread_mutex_lock(&stream->lock);
 
 	/*
@@ -2017,6 +2028,7 @@ static int add_metadata_stream(struct lttng_consumer_stream *stream,
 	rcu_read_unlock();
 
 	pthread_mutex_unlock(&stream->lock);
+	pthread_mutex_unlock(&stream->chan->lock);
 	pthread_mutex_unlock(&consumer_data.lock);
 	return ret;
 }
@@ -3457,3 +3469,23 @@ int consumer_send_status_channel(int sock,
 
 	return lttcomm_send_unix_sock(sock, &msg, sizeof(msg));
 }
+
+/*
+ * Using a maximum stream size with the produced and consumed position of a
+ * stream, computes the new consumed position to be as close as possible to the
+ * maximum possible stream size.
+ *
+ * If maximum stream size is lower than the possible buffer size (produced -
+ * consumed), the consumed_pos given is returned untouched else the new value
+ * is returned.
+ */
+unsigned long consumer_get_consumed_maxsize(unsigned long consumed_pos,
+		unsigned long produced_pos, uint64_t max_stream_size)
+{
+	if (max_stream_size && max_stream_size < (produced_pos - consumed_pos)) {
+		/* Offset from the produced position to get the latest buffers. */
+		return produced_pos - max_stream_size;
+	}
+
+	return consumed_pos;
+}