netdev - Re: [PATCH v3 net-next 9/9] i40e: respect metadata on XSK Rx to skb

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Message-ID: <87463ddc-bf93-99cc-65d1-cbc215125ec3@redhat.com>
Date:   Wed, 8 Dec 2021 14:47:35 +0100
From:   Jesper Dangaard Brouer <jbrouer@...hat.com>
To:     Alexander Lobakin <alexandr.lobakin@...el.com>,
        intel-wired-lan@...ts.osuosl.org
Cc:     brouer@...hat.com, Jesse Brandeburg <jesse.brandeburg@...el.com>,
        Tony Nguyen <anthony.l.nguyen@...el.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        John Fastabend <john.fastabend@...il.com>,
        Björn Töpel <bjorn@...nel.org>,
        Maciej Fijalkowski <maciej.fijalkowski@...el.com>,
        Michal Swiatkowski <michal.swiatkowski@...ux.intel.com>,
        Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
        Krzysztof Kazimierczak <krzysztof.kazimierczak@...el.com>,
        Jithu Joseph <jithu.joseph@...el.com>,
        Andre Guedes <andre.guedes@...el.com>,
        Vedang Patel <vedang.patel@...el.com>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, bpf@...r.kernel.org
Subject: Re: [PATCH v3 net-next 9/9] i40e: respect metadata on XSK Rx to skb


On 07/12/2021 21.55, Alexander Lobakin wrote:
> For now, if the XDP prog returns XDP_PASS on XSK, the metadata will
> be lost as it doesn't get copied to the skb.
> Copy it along with the frame headers. Account its size on skb
> allocation, and when copying just treat it as a part of the frame
> and do a pull after to "move" it to the "reserved" zone.
> net_prefetch() xdp->data_meta and align the copy size to speed-up
> memcpy() a little and better match ixgbee_costruct_skb().
                                      ^^^^^^^^^^^^^^^^^^^
Misspelling function name.

> 
> Fixes: d0bcacd0a130 ("ixgbe: add AF_XDP zero-copy Rx support")
> Suggested-by: Jesper Dangaard Brouer <brouer@...hat.com>
> Suggested-by: Maciej Fijalkowski <maciej.fijalkowski@...el.com>
> Signed-off-by: Alexander Lobakin <alexandr.lobakin@...el.com>
> Reviewed-by: Michal Swiatkowski <michal.swiatkowski@...ux.intel.com>
> ---
>   drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c | 14 ++++++++++----
>   1 file changed, 10 insertions(+), 4 deletions(-)

Wrong driver (i40e:) "tagged" in subject.