#include <limits.h>
#include <urcu.h>
#include <urcu/wfqueue.h>
+#include <urcu/list.h>
#include <common/hashtable/hashtable.h>
-#include <common/index/lttng-index.h>
+#include <common/index/ctf-index.h>
#include "ctf-trace.h"
+#include "session.h"
/*
* Queue used to enqueue relay requests
};
enum connection_type {
- RELAY_DATA,
- RELAY_CONTROL,
- RELAY_VIEWER_COMMAND,
- RELAY_VIEWER_NOTIFICATION,
+ RELAY_DATA = 1,
+ RELAY_CONTROL = 2,
+ RELAY_VIEWER_COMMAND = 3,
+ RELAY_VIEWER_NOTIFICATION = 4,
};
/*
- * Represents a session for the relay point of view
+ * 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_session {
- /*
- * This session id is used to identify a set of stream to a tracing session
- * but also make sure we have a unique session id associated with a session
- * daemon which can provide multiple data source.
- */
- uint64_t id;
- struct lttcomm_sock *sock;
- char session_name[NAME_MAX];
- char hostname[HOST_NAME_MAX];
- uint32_t live_timer;
- struct lttng_ht_node_ulong session_n;
- struct rcu_head rcu_node;
- uint32_t viewer_attached;
- uint32_t stream_count;
+struct relay_stream_recv_handle {
+ uint64_t id; /* stream handle */
+ struct cds_list_head node;
};
/*
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;
- struct relay_viewer_stream *viewer_stream;
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
* 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;
-};
-
-/*
- * Shadow copy of the relay_stream structure for the viewer side. The only
- * fields updated by the writer (streaming side) after allocation are :
- * total_index_received and close_flag. Everything else is updated by the
- * reader (viewer side).
- */
-struct relay_viewer_stream {
- uint64_t stream_handle;
- uint64_t session_id;
- int read_fd;
- int index_read_fd;
- char *path_name;
- char *channel_name;
- uint64_t last_sent_index;
- uint64_t total_index_received;
- uint64_t tracefile_size;
- uint64_t tracefile_size_current;
- uint64_t tracefile_count;
- uint64_t tracefile_count_current;
- struct lttng_ht_node_u64 stream_n;
- struct rcu_head rcu_node;
- struct ctf_trace *ctf_trace;
- /* Information telling us if the stream is a metadata stream. */
- 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;
};
/*
struct lttng_ht_node_ulong sock_n;
struct rcu_head rcu_node;
enum connection_type type;
- unsigned int version_check_done:1;
/* protocol version to use for this session */
uint32_t major;
uint32_t minor;
struct lttng_ht *ctf_traces_ht; /* indexed by path name */
+ uint64_t session_id;
+ struct cds_list_head recv_head;
+ unsigned int version_check_done:1;
};
struct relay_local_data {
struct lttng_ht *sessions_ht;
- struct lttng_ht *viewer_streams_ht;
};
extern char *opt_output_path;
extern struct lttng_ht *relay_streams_ht;
+extern struct lttng_ht *viewer_streams_ht;
+extern struct lttng_ht *indexes_ht;
+
+extern const char *tracing_group_name;
+
+extern const char * const config_section_name;
+
+extern int thread_quit_pipe[2];
struct relay_stream *relay_stream_find_by_id(uint64_t stream_id);
+void lttng_relay_notify_ready(void);
#endif /* LTTNG_RELAYD_H */