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Diffstat (limited to 'include/uapi/linux/neighbour.h')
-rw-r--r--include/uapi/linux/neighbour.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/uapi/linux/neighbour.h b/include/uapi/linux/neighbour.h
index b851c36ad25d..c34a81245f87 100644
--- a/include/uapi/linux/neighbour.h
+++ b/include/uapi/linux/neighbour.h
@@ -54,6 +54,7 @@ enum {
/* Extended flags under NDA_FLAGS_EXT: */
#define NTF_EXT_MANAGED (1 << 0)
#define NTF_EXT_LOCKED (1 << 1)
+#define NTF_EXT_EXT_VALIDATED (1 << 2)
/*
* Neighbor Cache Entry States.
@@ -92,6 +93,10 @@ enum {
* bridge in response to a host trying to communicate via a locked bridge port
* with MAB enabled. Their purpose is to notify user space that a host requires
* authentication.
+ *
+ * NTF_EXT_EXT_VALIDATED flagged neighbor entries were externally validated by
+ * a user space control plane. The kernel will not remove or invalidate them,
+ * but it can probe them and notify user space when they become reachable.
*/
struct nda_cacheinfo {