Re: [PATCH net-next v2 03/12] ethtool: Add loopback netlink UAPI definitions

[Jakub Kicinski]

On Wed, 25 Mar 2026 15:50:10 +0100 Björn Töpel wrote:
> +      -
> +        name: depth
> +        type: u8
> +        doc: |
> +          Ordering index within a component instance. When a component
> +          has multiple loopback points of the same type (e.g. two PCS
> +          blocks inside a rate-adaptation PHY), depth distinguishes
> +          them. Lower depth values are closer to the host side, higher
> +          values are closer to the line/media side. Defaults to 0 when
> +          there is only one loopback point per (component, name) tuple.
> +      -
> +        name: supported
> +        type: u8
> +        enum: loopback-direction
> +        enum-as-flags: true
> +        doc: Bitmask of supported loopback directions
> +      -
> +        name: direction
> +        type: u8
> +        enum: loopback-direction
> +        doc: Current loopback direction, 0 means disabled

u32, Netlink attrs are padded to 4B anyway