X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=src%2Fcommon%2Fconsumer%2Fconsumer.h;h=af36de11c2504b39e23039a2cff1235385443267;hb=e8360425c2fd0f8cfef1e678af5adfde7ae0a68e;hp=a7d0ee1a706cc719f6877b168a6819f97f72b0ac;hpb=d9a2e16ee3abce83801f58473831330aa8a5463b;p=lttng-tools.git

diff --git a/src/common/consumer/consumer.h b/src/common/consumer/consumer.h
index a7d0ee1a7..af36de11c 100644
--- a/src/common/consumer/consumer.h
+++ b/src/common/consumer/consumer.h
@@ -62,7 +62,10 @@ enum lttng_consumer_command {
 	LTTNG_CONSUMER_LOST_PACKETS,
 	LTTNG_CONSUMER_CLEAR_QUIESCENT_CHANNEL,
 	LTTNG_CONSUMER_SET_CHANNEL_MONITOR_PIPE,
+	LTTNG_CONSUMER_SET_CHANNEL_ROTATE_PIPE,
+	LTTNG_CONSUMER_ROTATE_CHANNEL,
 	LTTNG_CONSUMER_ROTATE_RENAME,
+	LTTNG_CONSUMER_ROTATE_PENDING_RELAY,
 	LTTNG_CONSUMER_MKDIR,
 };
 
@@ -228,6 +231,20 @@ struct lttng_consumer_channel {
 	uint64_t lost_packets;
 
 	bool streams_sent_to_relayd;
+
+	/*
+	 * Account how many streams are waiting for their rotation to be
+	 * complete. When this number reaches 0, we inform the session
+	 * daemon that this channel has finished its rotation.
+	 */
+	uint64_t nr_stream_rotate_pending;
+
+	/*
+	 * The chunk id where we currently write the data. This value is sent
+	 * to the relay when we add a stream and when a stream rotates. This
+	 * allows to keep track of where each stream on the relay is writing.
+	 */
+	uint64_t current_chunk_id;
 };
 
 /*
@@ -415,6 +432,14 @@ struct lttng_consumer_stream {
 	pthread_cond_t metadata_rdv;
 	pthread_mutex_t metadata_rdv_lock;
 
+	/*
+	 * rotate_position represents the position in the ring-buffer that has to
+	 * be flushed to disk to complete the ongoing rotation. When that position
+	 * is reached, this tracefile can be closed and a new one is created in
+	 * channel_read_only_attributes.path.
+	 */
+	unsigned long rotate_position;
+
 	/*
 	 * Read-only copies of channel values. We cannot safely access the
 	 * channel from a stream, so we need to have a local copy of these
@@ -426,6 +451,12 @@ struct lttng_consumer_stream {
 		uint64_t tracefile_size;
 	} channel_read_only_attributes;
 
+	/*
+	 * Flag to inform the data or metadata thread that a stream is
+	 * ready to be rotated.
+	 */
+	bool rotate_ready;
+
 	/* Indicate if the stream still has some data to be read. */
 	unsigned int has_data:1;
 	/*
@@ -565,6 +596,11 @@ struct lttng_consumer_local_data {
 	 * to the session daemon (write-only).
 	 */
 	int channel_monitor_pipe;
+	/*
+	 * Pipe used to inform the session daemon that a stream has finished
+	 * its rotation (write-only).
+	 */
+	int channel_rotate_pipe;
 };
 
 /*
@@ -744,9 +780,12 @@ ssize_t lttng_consumer_on_read_subbuffer_splice(
 		struct lttng_consumer_stream *stream, unsigned long len,
 		unsigned long padding,
 		struct ctf_packet_index *index);
+int lttng_consumer_sample_snapshot_positions(struct lttng_consumer_stream *stream);
 int lttng_consumer_take_snapshot(struct lttng_consumer_stream *stream);
 int lttng_consumer_get_produced_snapshot(struct lttng_consumer_stream *stream,
 		unsigned long *pos);
+int lttng_consumer_get_consumed_snapshot(struct lttng_consumer_stream *stream,
+		unsigned long *pos);
 int lttng_ustconsumer_get_wakeup_fd(struct lttng_consumer_stream *stream);
 int lttng_ustconsumer_close_wakeup_fd(struct lttng_consumer_stream *stream);
 void *consumer_thread_metadata_poll(void *data);
@@ -780,8 +819,19 @@ void consumer_del_stream_for_data(struct lttng_consumer_stream *stream);
 void consumer_add_metadata_stream(struct lttng_consumer_stream *stream);
 void consumer_del_stream_for_metadata(struct lttng_consumer_stream *stream);
 int consumer_create_index_file(struct lttng_consumer_stream *stream);
+int lttng_consumer_rotate_channel(uint64_t key, const char *path,
+		uint64_t relayd_id, uint32_t metadata,
+		uint64_t new_chunk_id, struct lttng_consumer_local_data *ctx);
+int lttng_consumer_stream_is_rotate_ready(struct lttng_consumer_stream *stream);
+int lttng_consumer_rotate_stream(struct lttng_consumer_local_data *ctx,
+		struct lttng_consumer_stream *stream, bool *rotated);
+int lttng_consumer_rotate_ready_streams(uint64_t key,
+		struct lttng_consumer_local_data *ctx);
 int lttng_consumer_rotate_rename(const char *current_path, const char *new_path,
 		uid_t uid, gid_t gid, uint64_t relayd_id);
+int lttng_consumer_rotate_pending_relay( uint64_t session_id,
+		uint64_t relayd_id, uint64_t chunk_id);
+void lttng_consumer_reset_stream_rotate_state(struct lttng_consumer_stream *stream);
 int lttng_consumer_mkdir(const char *path, uid_t uid, gid_t gid,
 		uint64_t relayd_id);