#define LTTNG_RELAYD_H
#define _LGPL_SOURCE
+#include <limits.h>
#include <urcu.h>
#include <urcu/wfqueue.h>
+#include <urcu/list.h>
+
+#include <common/hashtable/hashtable.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_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;
- /* protocol version to use for this session */
- uint32_t major;
- uint32_t minor;
+struct relay_stream_recv_handle {
+ uint64_t id; /* stream handle */
+ struct cds_list_head node;
};
/*
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;
- uint64_t last_net_seq_num;
/* 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;
};
/*
struct lttng_ht_node_ulong sock_n;
struct rcu_head rcu_node;
enum connection_type type;
+ /* 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;
+};
+
+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 */