netdev - Re: [PATCH RFC bpf-next 1/6] netlink: specs: Add XDP RX checksum capability to XDP metadata specs

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Message-ID: <aNFtljcYeLK3uVo3@mini-arch>
Date: Mon, 22 Sep 2025 08:39:02 -0700
From: Stanislav Fomichev <stfomichev@...il.com>
To: Lorenzo Bianconi <lorenzo@...nel.org>
Cc: Donald Hunter <donald.hunter@...il.com>,
	Jakub Kicinski <kuba@...nel.org>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>,
	Simon Horman <horms@...nel.org>,
	Alexei Starovoitov <ast@...nel.org>,
	Daniel Borkmann <daniel@...earbox.net>,
	Jesper Dangaard Brouer <hawk@...nel.org>,
	John Fastabend <john.fastabend@...il.com>,
	Stanislav Fomichev <sdf@...ichev.me>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	Tony Nguyen <anthony.l.nguyen@...el.com>,
	Przemek Kitszel <przemyslaw.kitszel@...el.com>,
	Alexander Lobakin <aleksander.lobakin@...el.com>,
	Andrii Nakryiko <andrii@...nel.org>,
	Martin KaFai Lau <martin.lau@...ux.dev>,
	Eduard Zingerman <eddyz87@...il.com>, Song Liu <song@...nel.org>,
	Yonghong Song <yonghong.song@...ux.dev>,
	KP Singh <kpsingh@...nel.org>, Hao Luo <haoluo@...gle.com>,
	Jiri Olsa <jolsa@...nel.org>, Shuah Khan <shuah@...nel.org>,
	netdev@...r.kernel.org, bpf@...r.kernel.org,
	intel-wired-lan@...ts.osuosl.org, linux-kselftest@...r.kernel.org
Subject: Re: [PATCH RFC bpf-next 1/6] netlink: specs: Add XDP RX checksum
 capability to XDP metadata specs

On 09/20, Lorenzo Bianconi wrote:
> Introduce XDP RX checksum capability to XDP metadata specs. XDP RX
> checksum will be use by devices capable of exposing receive checksum
> result via bpf_xdp_metadata_rx_checksum().
> 
> Signed-off-by: Lorenzo Bianconi <lorenzo@...nel.org>
> ---
>  Documentation/netlink/specs/netdev.yaml | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/Documentation/netlink/specs/netdev.yaml b/Documentation/netlink/specs/netdev.yaml
> index e00d3fa1c152d7165e9485d6d383a2cc9cef7cfd..00699bf4a7fdb67c6b9ee3548098b0c933fd39a4 100644
> --- a/Documentation/netlink/specs/netdev.yaml
> +++ b/Documentation/netlink/specs/netdev.yaml
> @@ -61,6 +61,11 @@ definitions:
>          doc: |
>            Device is capable of exposing receive packet VLAN tag via
>            bpf_xdp_metadata_rx_vlan_tag().
> +      -
> +        name: checksum
> +        doc: |
> +          Device is capable of exposing receive checksum result via
> +          bpf_xdp_metadata_rx_checksum().
>    -
>      type: flags
>      name: xsk-flags

nit: let's fold it into patch 2? Will be easier to git blame the
feature..