document PROTO_FLAG_IMMEDIATE

diff --git a/DESIGN b/DESIGN
index 02ffe5cc76d1c7d1414d15615bd8296e52048b12..4d58bcff5f8b67eef0b3cd253ccec4b08180e071 100644 (file)
--- a/DESIGN
+++ b/DESIGN
@@ -132,5 +132,9 @@ set, the protocol handler needs to clean up immediately as good as possible,
 without waiting for its pending actions to complete. If it has spawned
 any child processes, it needs to kill them and clean up their mess.
 
+Simple protocol handlers can set the PROTO_FLAG_IMMEDIATE flag if they
+can perform all required actions immediately without waiting and thus
+do not need to schedule IFPEV_UP and IFPEV_DOWN transitions. This will
+cause those events to be generated by core code instead.
 
 ## TODO: Configuration management, ubus callbacks