Subject: Re: [PATCH net-next v5 05/13] net: ethtool: Allow passing a phy index for some commands

From: Jakub Kicinski <[email-masked]>
Date: Thu, 4 Jan 2024 15:15:16 -0800

On Thu, 21 Dec 2023 19:00:38 +0100 Maxime Chevallier wrote:
> @@ -20,6 +21,7 @@ const struct nla_policy ethnl_header_policy[] = {
>  					    .len = ALTIFNAMSIZ - 1 },
>  	[ETHTOOL_A_HEADER_FLAGS]	= NLA_POLICY_MASK(NLA_U32,
>  							  ETHTOOL_FLAGS_BASIC),
> +	[ETHTOOL_A_HEADER_PHY_INDEX]		= NLA_POLICY_MIN(NLA_U32, 1),
>  };
>  
>  const struct nla_policy ethnl_header_policy_stats[] = {
> @@ -28,6 +30,7 @@ const struct nla_policy ethnl_header_policy_stats[] = {
>  					    .len = ALTIFNAMSIZ - 1 },
>  	[ETHTOOL_A_HEADER_FLAGS]	= NLA_POLICY_MASK(NLA_U32,
>  							  ETHTOOL_FLAGS_STATS),
> +	[ETHTOOL_A_HEADER_PHY_INDEX]		= NLA_POLICY_MIN(NLA_U32, 1),
>  };

You should define (copy/paste) a new header policy and use it
only for commands which actually make use of the PHY index.
That's why we have separate copies already for stats.