netdev - Re: [PATCH net 2/3] net/xfrm: Add inner_ipproto into sec

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Date:   Thu, 15 Apr 2021 09:47:49 +0200
From:   Steffen Klassert <steffen.klassert@...unet.com>
To:     Saeed Mahameed <saeed@...nel.org>
CC:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, <netdev@...r.kernel.org>,
        Huy Nguyen <huyn@...dia.com>, Raed Salem <raeds@...dia.com>
Subject: Re: [PATCH net 2/3] net/xfrm: Add inner_ipproto into sec_path

On Wed, Apr 14, 2021 at 04:25:39PM -0700, Saeed Mahameed wrote:
> From: Huy Nguyen <huyn@...dia.com>
> 
> The inner_ipproto saves the inner IP protocol of the plain
> text packet. This allows vendor's IPsec feature making offload
> decision at skb's features_check and configuring hardware at
> ndo_start_xmit.
> 
> For example, ConnectX6-DX IPsec device needs the plaintext's
> IP protocol to support partial checksum offload on
> VXLAN/GENEVE packet over IPsec transport mode tunnel.
> 
> Signed-off-by: Raed Salem <raeds@...dia.com>
> Signed-off-by: Huy Nguyen <huyn@...dia.com>
> Cc: Steffen Klassert <steffen.klassert@...unet.com>
> ---
>  include/net/xfrm.h     |  1 +
>  net/xfrm/xfrm_output.c | 36 +++++++++++++++++++++++++++++++++++-
>  2 files changed, 36 insertions(+), 1 deletion(-)
> 
> diff --git a/include/net/xfrm.h b/include/net/xfrm.h
> index c58a6d4eb610..e535700431fb 100644
> --- a/include/net/xfrm.h
> +++ b/include/net/xfrm.h
> @@ -1032,6 +1032,7 @@ struct sec_path {
>  
>  	struct xfrm_state	*xvec[XFRM_MAX_DEPTH];
>  	struct xfrm_offload	ovec[XFRM_MAX_OFFLOAD_DEPTH];
> +	u8			inner_ipproto;

This is for offload, so it should go to struct xfrm_offload.
We have already 'proto' there, so it is just easy add
'inner_proto'.