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-rw-r--r--include/net/neighbour.h4
-rw-r--r--include/uapi/linux/neighbour.h5
2 files changed, 8 insertions, 1 deletions
diff --git a/include/net/neighbour.h b/include/net/neighbour.h
index c7ce5ec7be23..7e865b14749d 100644
--- a/include/net/neighbour.h
+++ b/include/net/neighbour.h
@@ -261,13 +261,15 @@ static inline void *neighbour_priv(const struct neighbour *n)
#define NEIGH_UPDATE_F_EXT_LEARNED BIT(5)
#define NEIGH_UPDATE_F_ISROUTER BIT(6)
#define NEIGH_UPDATE_F_ADMIN BIT(7)
+#define NEIGH_UPDATE_F_EXT_VALIDATED BIT(8)
/* In-kernel representation for NDA_FLAGS_EXT flags: */
#define NTF_OLD_MASK 0xff
#define NTF_EXT_SHIFT 8
-#define NTF_EXT_MASK (NTF_EXT_MANAGED)
+#define NTF_EXT_MASK (NTF_EXT_MANAGED | NTF_EXT_EXT_VALIDATED)
#define NTF_MANAGED (NTF_EXT_MANAGED << NTF_EXT_SHIFT)
+#define NTF_EXT_VALIDATED (NTF_EXT_EXT_VALIDATED << NTF_EXT_SHIFT)
extern const struct nla_policy nda_policy[];
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 {