X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fsession.h;h=92e7a11ad430dfe7c05a7a9ce28f4a66ddebb278;hp=b8c7890810ab966d23860805cabfff5be62426e9;hb=766048521f3bc7beb1209e2bb939ca2b42532a52;hpb=dd73d57bb95fae31161ca0781108d166082a06f5

diff --git a/src/bin/lttng-sessiond/session.h b/src/bin/lttng-sessiond/session.h
index b8c789081..92e7a11ad 100644
--- a/src/bin/lttng-sessiond/session.h
+++ b/src/bin/lttng-sessiond/session.h
@@ -120,8 +120,20 @@ struct ltt_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
@@ -200,6 +212,7 @@ 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);