[Intel-wired-lan] [PATCH v4 net-next 2/9] i40e: respect metadata on XSK Rx to skb
Bhandare, KiranX
kiranx.bhandare at intel.com
Mon Jan 10 11:24:21 UTC 2022
> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces at osuosl.org> On Behalf Of
> Lobakin, Alexandr
> Sent: Wednesday, December 8, 2021 7:37 PM
> To: intel-wired-lan at lists.osuosl.org
> Cc: Song Liu <songliubraving at fb.com>; Alexei Starovoitov <ast at kernel.org>;
> Andrii Nakryiko <andrii at kernel.org>; Daniel Borkmann
> <daniel at iogearbox.net>; John Fastabend <john.fastabend at gmail.com>;
> Brouer, Jesper <brouer at redhat.com>; Yonghong Song <yhs at fb.com>;
> Jesper Dangaard Brouer <hawk at kernel.org>; KP Singh
> <kpsingh at kernel.org>; Jakub Kicinski <kuba at kernel.org>;
> netdev at vger.kernel.org; linux-kernel at vger.kernel.org; David S. Miller
> <davem at davemloft.net>; Björn Töpel <bjorn at kernel.org>;
> bpf at vger.kernel.org; Martin KaFai Lau <kafai at fb.com>
> Subject: [Intel-wired-lan] [PATCH v4 net-next 2/9] i40e: respect metadata on
> XSK Rx to skb
>
> 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 i40e_costruct_skb().
>
> Fixes: 0a714186d3c0 ("i40e: add AF_XDP zero-copy Rx support")
> Suggested-by: Jesper Dangaard Brouer <brouer at redhat.com>
> Suggested-by: Maciej Fijalkowski <maciej.fijalkowski at intel.com>
> Signed-off-by: Alexander Lobakin <alexandr.lobakin at intel.com>
> Reviewed-by: Michal Swiatkowski <michal.swiatkowski at linux.intel.com>
> ---
> drivers/net/ethernet/intel/i40e/i40e_xsk.c | 14 ++++++++++----
> 1 file changed, 10 insertions(+), 4 deletions(-)
>
Tested-by: Kiran Bhandare <kiranx.bhandare at intel.com> A Contingent Worker at Intel
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