From 1afde094988702fbc8cd553fedbed883d3be5638 Mon Sep 17 00:00:00 2001 From: Stephen Hemminger Date: Wed, 18 Aug 2021 14:09:34 -0700 Subject: [PATCH] uapi: update neighbour.h Signed-off-by: Stephen Hemminger --- include/uapi/linux/neighbour.h | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/include/uapi/linux/neighbour.h b/include/uapi/linux/neighbour.h index dc8b7220..00a60695 100644 --- a/include/uapi/linux/neighbour.h +++ b/include/uapi/linux/neighbour.h @@ -66,8 +66,11 @@ enum { #define NUD_NONE 0x00 /* NUD_NOARP & NUD_PERMANENT are pseudostates, they never change - and make no address resolution or NUD. - NUD_PERMANENT also cannot be deleted by garbage collectors. + * and make no address resolution or NUD. + * NUD_PERMANENT also cannot be deleted by garbage collectors. + * When NTF_EXT_LEARNED is set for a bridge fdb entry the different cache entry + * states don't make sense and thus are ignored. Such entries don't age and + * can roam. */ struct nda_cacheinfo {