X-Git-Url: https://git.liburcu.org/?a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fsession.h;h=0144ca6ff9bd9fdd5510f7e940aa2b184a97cbe8;hb=3b7acd378075874ea852b0c63aa468e8c4fd1cec;hp=204701429ded69ba43c77b8917306bc347330172;hpb=55ce50b6dff358ae18694c692a1c243b8d58c130;p=lttng-tools.git

diff --git a/src/bin/lttng-sessiond/session.h b/src/bin/lttng-sessiond/session.h
index 204701429..0144ca6ff 100644
--- a/src/bin/lttng-sessiond/session.h
+++ b/src/bin/lttng-sessiond/session.h
@@ -77,6 +77,8 @@ struct ltt_session {
 	bool has_auto_generated_name;
 	bool name_contains_creation_time;
 	char hostname[HOST_NAME_MAX]; /* Local hostname. */
+	/* Path of the last closed chunk. */
+	char last_chunk_path[LTTNG_PATH_MAX];
 	time_t creation_time;
 	struct ltt_kernel_session *kernel_session;
 	struct ltt_ust_session *ust_session;
@@ -189,13 +191,22 @@ struct ltt_session {
 	char *base_path;
 };
 
-/* Prototypes */
 enum lttng_error_code session_create(const char *name, uid_t uid, gid_t gid,
-		const char *base_path, struct ltt_session **out_session);
+		struct ltt_session **out_session);
 void session_lock(struct ltt_session *session);
+void session_unlock(struct ltt_session *session);
+
+/*
+ * The session list lock covers more ground than its name implies. While
+ * it does protect against concurent mutations of the session list, it is
+ * also used as a multi-session lock when synchronizing newly-registered
+ * 'user space tracer' and 'agent' applications.
+ *
+ * In other words, it prevents session configurations from changing while they
+ * are being transmitted to the various applications.
+ */
 void session_lock_list(void);
 int session_trylock_list(void);
-void session_unlock(struct ltt_session *session);
 void session_unlock_list(void);
 
 void session_destroy(struct ltt_session *session);
@@ -251,7 +262,8 @@ int session_set_trace_chunk(struct ltt_session *session,
  */
 int session_close_trace_chunk(const struct ltt_session *session,
 		struct lttng_trace_chunk *trace_chunk,
-		const enum lttng_trace_chunk_command_type *close_command);
+		const enum lttng_trace_chunk_command_type *close_command,
+		char *path);
 
 bool session_output_supports_trace_chunks(const struct ltt_session *session);