Docs: Add documentation explaining the meaning of "internal" events

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>

diff --git a/src/bin/lttng-sessiond/trace-ust.h b/src/bin/lttng-sessiond/trace-ust.h
index f114628d0849f114e74da1879bfdd75748ce1a1a..4a818df1a06ab996d6510d0d6e785ac40f20b004 100644 (file)
--- a/src/bin/lttng-sessiond/trace-ust.h
+++ b/src/bin/lttng-sessiond/trace-ust.h
@@ -53,6 +53,12 @@ struct ltt_ust_event {
        char *filter_expression;
        struct lttng_ust_filter_bytecode *filter;
        struct lttng_event_exclusion *exclusion;
+       /*
+        * An internal event is an event which was created by the session daemon
+        * through which, for example, events emitted in Agent domains are
+        * "funelled". This is used to hide internal events from external
+        * clients as they should never be modified by the external world.
+        */
        bool internal;
 };