Re: [PATCH net-next 1/2] net: add IFLA_MAX_PACING_OFFLOAD_HORIZON device attribute

[Willem de Bruijn <willemdebruijn.kernel@gmail.com>]

Eric Dumazet wrote:
> Some network devices have the ability to offload EDT (Earliest
> Departure Time) which is the model used for TCP pacing and FQ
> packet scheduler.
> 
> Some of them implement the timing wheel mechanism described in
> https://saeed.github.io/files/carousel-sigcomm17.pdf
> with an associated 'timing wheel horizon'.
> 
> This patch adds dev->max_pacing_offload_horizon expressing
> this timing wheel horizon in nsec units.
> 
> This is a read-only attribute.
> 
> Unless a driver sets it, dev->max_pacing_offload_horizon
> is zero.
> 
> Signed-off-by: Eric Dumazet <edumazet@google.com>

Reviewed-by: Willem de Bruijn <willemb@google.com>

> @@ -2030,6 +2034,7 @@ static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
>  	[IFLA_ALLMULTI]		= { .type = NLA_REJECT },
>  	[IFLA_GSO_IPV4_MAX_SIZE]	= { .type = NLA_U32 },
>  	[IFLA_GRO_IPV4_MAX_SIZE]	= { .type = NLA_U32 },
> +	[IFLA_MAX_PACING_OFFLOAD_HORIZON]= { .type = NLA_REJECT },

nit: checkpatch does not like the lack of whitespace before assignment
in such C99 designated initializers. Probably just stylistic.