netdev - Re: [RFC bpf-next v3 09/14] net/mlx5e: Implement devtx kfuncs

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Date: Wed, 12 Jul 2023 12:42:35 -0700
From: Alexei Starovoitov <alexei.starovoitov@...il.com>
To: Willem de Bruijn <willemdebruijn.kernel@...il.com>
Cc: Stanislav Fomichev <sdf@...gle.com>, bpf <bpf@...r.kernel.org>, 
	Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>, 
	Andrii Nakryiko <andrii@...nel.org>, Martin KaFai Lau <martin.lau@...ux.dev>, Song Liu <song@...nel.org>, 
	Yonghong Song <yhs@...com>, John Fastabend <john.fastabend@...il.com>, KP Singh <kpsingh@...nel.org>, 
	Hao Luo <haoluo@...gle.com>, Jiri Olsa <jolsa@...nel.org>, Jakub Kicinski <kuba@...nel.org>, 
	Toke Høiland-Jørgensen <toke@...nel.org>, 
	Willem de Bruijn <willemb@...gle.com>, David Ahern <dsahern@...nel.org>, 
	"Karlsson, Magnus" <magnus.karlsson@...el.com>, Björn Töpel <bjorn@...nel.org>, 
	"Fijalkowski, Maciej" <maciej.fijalkowski@...el.com>, Jesper Dangaard Brouer <hawk@...nel.org>, 
	Network Development <netdev@...r.kernel.org>, xdp-hints@...-project.net
Subject: Re: [RFC bpf-next v3 09/14] net/mlx5e: Implement devtx kfuncs

On Wed, Jul 12, 2023 at 12:12 PM Willem de Bruijn
<willemdebruijn.kernel@...il.com> wrote:
>
> Basically, add to AF_XDP what we already have for its predecessor
> AF_PACKET: setsockopt PACKET_VNET_HDR?
>
> Possibly with a separate new struct, rather than virtio_net_hdr. As
> that has dependencies on other drivers, notably virtio and its
> specification process.

yeah. Forgot about this one.
That's a perfect fit. I would reuse virtio_net_hdr as-is.
Why reinvent the wheel?
It would force uapi, but some might argue it's a good thing.