* Node in ltt_sessions_ht_by_id.
*/
struct lttng_ht_node_u64 node;
- /* Number of session rotation for this session. */
- uint64_t rotate_count;
+ /*
+ * The current archive id corresponds to the number of session rotations
+ * that have occured for this session. The archive id
+ * is used to tag the "generation" of a stream. This tag allows the
+ * consumer and relay daemons to track when a given stream was created
+ * during the lifetime of a session.
+ *
+ * For instance, if a stream is created after a session rotation was
+ * launched, the consumer and relay daemons must not check its position
+ * to determine if that specific session rotation was completed. It is
+ * implicitly "completed" since the stream appeared _after_ the session
+ * rotation was initiated.
+ */
+ uint64_t current_archive_id;
/*
* Rotation is pending between the time it starts until the consumer has
* finished extracting the data. If the session uses a relay, data related
/* Timer to periodically rotate a session. */
bool rotate_timer_enabled;
timer_t rotate_timer;
+ /* Value for periodic rotations, 0 if disabled. */
uint64_t rotate_timer_period;
- /* Value for size-based rotation, 0 if disabled. */
+ /* Value for size-based rotations, 0 if disabled. */
uint64_t rotate_size;
/*
* Keep a state if this session was rotated after the last stop command.
void session_lock(struct ltt_session *session);
void session_lock_list(void);
+int session_trylock_list(void);
void session_unlock(struct ltt_session *session);
void session_unlock_list(void);