netdev - Re: [PATCH net v2 2/2] iavf: fix non-tunneled IPv6 UDP packet type and hashing

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Date:   Tue, 28 Feb 2023 17:52:56 +0100
From:   Alexander Lobakin <aleksander.lobakin@...el.com>
To:     Tony Nguyen <anthony.l.nguyen@...el.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
CC:     Michal Kubiak <michal.kubiak@...el.com>,
        Larysa Zaremba <larysa.zaremba@...el.com>,
        Maciej Fijalkowski <maciej.fijalkowski@...el.com>,
        Jesse Brandeburg <jesse.brandeburg@...el.com>,
        <intel-wired-lan@...ts.osuosl.org>, <netdev@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net v2 2/2] iavf: fix non-tunneled IPv6 UDP packet type
 and hashing

From: Alexander Lobakin <aleksander.lobakin@...el.com>
Date: Tue, 28 Feb 2023 17:46:13 +0100

> [PATCH net v2 2/2] iavf: fix non-tunneled IPv6 UDP packet type and hashing
> v2

How this got here ._.
Lemme know if I should resend (it's probably okay for Git, but may broke
Patchwork, dunno).

> Currently, IAVF's decode_rx_desc_ptype() correctly reports payload type
> of L4 for IPv4 UDP packets and IPv{4,6} TCP, but only L3 for IPv6 UDP.
> Originally, i40e, ice and iavf were affected.
> Commit 73df8c9e3e3d ("i40e: Correct UDP packet header for non_tunnel-ipv6")
> fixed that in i40e, then
> commit 638a0c8c8861 ("ice: fix incorrect payload indicator on PTYPE")
> fixed that for ice.
> IPv6 UDP is L4 obviously. Fix it and make iavf report correct L4 hash
> type for such packets, so that the stack won't calculate it on CPU when
> needs it.
> 
> Fixes: 206812b5fccb ("i40e/i40evf: i40e implementation for skb_set_hash")
> Reviewed-by: Larysa Zaremba <larysa.zaremba@...el.com>
> Reviewed-by: Michal Kubiak <michal.kubiak@...el.com>
> Signed-off-by: Alexander Lobakin <aleksander.lobakin@...el.com>
> ---
>  drivers/net/ethernet/intel/iavf/iavf_common.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/intel/iavf/iavf_common.c b/drivers/net/ethernet/intel/iavf/iavf_common.c
> index 16c490965b61..dd11dbbd5551 100644
> --- a/drivers/net/ethernet/intel/iavf/iavf_common.c
> +++ b/drivers/net/ethernet/intel/iavf/iavf_common.c
> @@ -661,7 +661,7 @@ struct iavf_rx_ptype_decoded iavf_ptype_lookup[BIT(8)] = {
>  	/* Non Tunneled IPv6 */
>  	IAVF_PTT(88, IP, IPV6, FRG, NONE, NONE, NOF, NONE, PAY3),
>  	IAVF_PTT(89, IP, IPV6, NOF, NONE, NONE, NOF, NONE, PAY3),
> -	IAVF_PTT(90, IP, IPV6, NOF, NONE, NONE, NOF, UDP,  PAY3),
> +	IAVF_PTT(90, IP, IPV6, NOF, NONE, NONE, NOF, UDP,  PAY4),
>  	IAVF_PTT_UNUSED_ENTRY(91),
>  	IAVF_PTT(92, IP, IPV6, NOF, NONE, NONE, NOF, TCP,  PAY4),
>  	IAVF_PTT(93, IP, IPV6, NOF, NONE, NONE, NOF, SCTP, PAY4),

Thanks,
Olek