#include <common/hashtable/hashtable.h>
#include <lttng/rotation.h>
+#include <lttng/location.h>
#include "snapshot.h"
#include "trace-kernel.h"
+#include "consumer.h"
struct ltt_ust_session;
* Node in ltt_sessions_ht_by_id.
*/
struct lttng_ht_node_u64 node;
- /* Number of session rotation for this session. */
- uint64_t rotate_count;
/*
- * Rotation is pending between the time it starts until the consumer has
- * finished extracting the data. If the session uses a relay, data related
- * to a rotation can still be in flight after that, see
- * rotate_pending_relay.
- */
- bool rotate_pending;
- /*
- * True until the relay has finished the rotation of all the streams.
- */
- bool rotate_pending_relay;
- /* Current status of a rotation. */
- enum lttng_rotation_status rotation_status;
- /*
- * Number of channels waiting for a rotation.
- * When this number reaches 0, we can handle the rename of the chunk
- * folder and inform the client that the rotate is finished.
- */
- unsigned int nr_chan_rotate_pending;
+ * 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 considered pending between the time it is launched up
+ * until the moment when the data has been writen at the destination
+ * and the trace archive has been renamed.
+ *
+ * When tracing locally, only 'rotation_pending_local' is used since
+ * no remote checks are needed. However, when tracing to a relay daemon,
+ * a second check is needed to ensure that the data has been
+ * commited at the remote destination.
+ */
+ bool rotation_pending_local;
+ bool rotation_pending_relay;
+ /* Current state of a rotation. */
+ enum lttng_rotation_state rotation_state;
struct {
/*
* When the rotation is in progress, the temporary path name is
* with the current timestamp.
*/
time_t current_chunk_start_ts;
+ /*
+ * Timer to check periodically if a relay and/or consumer has completed
+ * the last rotation.
+ */
+ bool rotation_pending_check_timer_enabled;
+ timer_t rotation_pending_check_timer;
+ /* Timer to periodically rotate a session. */
+ bool rotation_schedule_timer_enabled;
+ timer_t rotation_schedule_timer;
+ /* Value for periodic rotations, 0 if disabled. */
+ uint64_t rotate_timer_period;
+ /* 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.
* We only allow one rotation after a stop. At destroy, we also need to
* chunk.
*/
bool rotated_after_last_stop;
+ /*
+ * Condition and trigger for size-based rotations.
+ */
+ struct lttng_condition *rotate_condition;
+ struct lttng_trigger *rotate_trigger;
};
/* Prototypes */
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);
+enum consumer_dst_type session_get_consumer_destination_type(
+ const struct ltt_session *session);
+const char *session_get_net_consumer_hostname(
+ const struct ltt_session *session);
+void session_get_net_consumer_ports(
+ const struct ltt_session *session,
+ uint16_t *control_port, uint16_t *data_port);
+struct lttng_trace_archive_location *session_get_trace_archive_location(
+ struct ltt_session *session);
+
struct ltt_session *session_find_by_name(const char *name);
struct ltt_session *session_find_by_id(uint64_t id);
struct ltt_session_list *session_get_list(void);