#define _LTT_SESSION_H
#include <limits.h>
+#include <stdbool.h>
#include <urcu/list.h>
#include <common/hashtable/hashtable.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;
+ /*
+ * 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
* rotate_pending_relay.
*/
bool rotate_pending;
- /* Current status of a rotation. */
- enum lttng_rotation_status rotation_status;
+ /*
+ * True until the relay has finished the rotation of all the streams.
+ */
+ bool rotate_pending_relay;
+ /* Current state of a rotation. */
+ enum lttng_rotation_state rotation_state;
/*
* Number of channels waiting for a rotation.
* When this number reaches 0, we can handle the rename of the chunk
* with the current timestamp.
*/
time_t current_chunk_start_ts;
+ /*
+ * Timer to check periodically if a relay has completed the last
+ * rotation.
+ */
+ bool rotate_relay_pending_timer_enabled;
+ timer_t rotate_relay_pending_timer;
+ /* Timer to periodically rotate a session. */
+ bool rotate_timer_enabled;
+ timer_t rotate_timer;
+ uint64_t rotate_timer_period;
+ /* Value for size-based rotation, 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
+ * know if a rotation occured since the last stop to rename the current
+ * 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 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);