-enum connection_type {
- RELAY_DATA = 1,
- RELAY_CONTROL = 2,
- RELAY_VIEWER_COMMAND = 3,
- RELAY_VIEWER_NOTIFICATION = 4,
-};
-
-/*
- * When we receive a stream, it gets stored in a list (on a per connection
- * basis) until we have all the streams of the same channel and the metadata
- * associated with it, then it gets flagged with viewer_ready.
- */
-struct relay_stream_recv_handle {
- uint64_t id; /* stream handle */
- struct cds_list_head node;
-};
-
-/*
- * Represents a stream in the relay
- */
-struct relay_stream {
- uint64_t stream_handle;
- uint64_t prev_seq; /* previous data sequence number encountered */
- struct lttng_ht_node_ulong stream_n;
- struct relay_session *session;
- struct rcu_head rcu_node;
- int fd;
- /* FD on which to write the index data. */
- int index_fd;
- /* FD on which to read the index data for the viewer. */
- int read_index_fd;
-
- char *path_name;
- char *channel_name;
- /* on-disk circular buffer of tracefiles */
- uint64_t tracefile_size;
- uint64_t tracefile_size_current;
- uint64_t tracefile_count;
- uint64_t tracefile_count_current;
- /* To inform the viewer up to where it can go back in time. */
- uint64_t oldest_tracefile_id;
-
- uint64_t total_index_received;
- uint64_t last_net_seq_num;
-
- /*
- * This node is added to the *control* connection hash table and the
- * pointer is copied in here so we can access it when deleting this object.
- * When deleting this, the ctf trace ht MUST NOT be destroyed. This happens
- * at connection deletion.
- */
- struct lttng_ht_node_str ctf_trace_node;
- struct lttng_ht *ctf_traces_ht;
-
- /*
- * To protect from concurrent read/update between the
- * streaming-side and the viewer-side.
- * This lock must be held, we reading/updating the
- * ctf_trace pointer.
- */
- pthread_mutex_t lock;
-
- struct ctf_trace *ctf_trace;
- /*
- * If the stream is inactive, this field is updated with the live beacon
- * timestamp end, when it is active, this field == -1ULL.
- */
- uint64_t beacon_ts_end;
- /*
- * To protect the update of the close_write_flag and the checks of
- * the tracefile_count_current.
- * It is taken before checking whenever we need to know if the
- * writer and reader are working in the same tracefile.
- */
- pthread_mutex_t viewer_stream_rotation_lock;
-
- /* Information telling us when to close the stream */
- unsigned int close_flag:1;
- /* Indicate if the stream was initialized for a data pending command. */
- unsigned int data_pending_check_done:1;
- unsigned int metadata_flag:1;
- /*
- * To detect when we start overwriting old data, it is used to
- * update the oldest_tracefile_id.
- */
- unsigned int tracefile_overwrite:1;
- /*
- * Can this stream be used by a viewer or are we waiting for additional
- * information.
- */
- unsigned int viewer_ready:1;
-};
-