X-Git-Url: http://git.efficios.com/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fsession.h;h=abbf9ece04a1a1b438287fda61f2f73f39a65f91;hp=368b352fa22388c9edae452fda760535b767ccf5;hb=87597c2c3bbaa1502ad2025cbf16704829f3b464;hpb=d98ad589cd758f4a3167fb451a6e45d167b42942

diff --git a/src/bin/lttng-sessiond/session.h b/src/bin/lttng-sessiond/session.h
index 368b352fa..abbf9ece0 100644
--- a/src/bin/lttng-sessiond/session.h
+++ b/src/bin/lttng-sessiond/session.h
@@ -19,12 +19,16 @@
 #define _LTT_SESSION_H
 
 #include <limits.h>
+#include <stdbool.h>
 #include <urcu/list.h>
 
 #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;
 
@@ -109,6 +113,99 @@ struct ltt_session {
 	 * Timer set when the session is created for live reading.
 	 */
 	unsigned int live_timer;
+	/*
+	 * Path where to keep the shared memory files.
+	 */
+	char shm_path[PATH_MAX];
+	/*
+	 * Node in ltt_sessions_ht_by_id.
+	 */
+	struct lttng_ht_node_u64 node;
+	/*
+	 * 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
+	 * 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 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
+	 * folder and inform the client that the rotate is finished.
+	 */
+	unsigned int nr_chan_rotate_pending;
+	struct {
+		/*
+		 * When the rotation is in progress, the temporary path name is
+		 * stored here. When the rotation is complete, the final path name
+		 * is here and can be queried with the rotate_pending call.
+		 */
+		char current_rotate_path[LTTNG_PATH_MAX];
+		/*
+		 * The path where the consumer is currently writing after the first
+		 * session rotation.
+		 */
+		char active_tracing_path[LTTNG_PATH_MAX];
+	} rotation_chunk;
+	/*
+	 * The timestamp of the beginning of the previous chunk. For the
+	 * first chunk, this is the "lttng start" timestamp. For the
+	 * subsequent ones, this copies the current_chunk_start_ts value when
+	 * a new rotation starts. This value is used to set the name of a
+	 * complete chunk directory, ex: "last_chunk_start_ts-now()".
+	 */
+	time_t last_chunk_start_ts;
+	/*
+	 * This is the timestamp when a new chunk starts. When a new rotation
+	 * starts, we copy this value to last_chunk_start_ts and replace it
+	 * 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;
+	/* 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
+	 * 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 */
@@ -117,10 +214,22 @@ int session_destroy(struct ltt_session *session);
 
 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);
 
 int session_access_ok(struct ltt_session *session, uid_t uid, gid_t gid);