Re: [PATCH net-next 1/2] neighbor: Add NTF_EXT_VALIDATED flag for externally validated entries

[Simon Horman <horms@kernel.org>]

On Wed, Jun 11, 2025 at 05:15:50PM +0300, Ido Schimmel wrote:

...

> diff --git a/include/uapi/linux/neighbour.h b/include/uapi/linux/neighbour.h
> index b851c36ad25d..27bedfcce537 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 neigbor entries were externally validated by a

nit: neighbor or neighbour

> + * 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 {

...