Messages in this thread | | | From | "Bhandare, KiranX" <> | Subject | RE: [Intel-wired-lan] [PATCH v4 net-next 2/9] i40e: respect metadata on XSK Rx to skb | Date | Mon, 10 Jan 2022 11:24:21 +0000 |
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> -----Original Message----- > From: Intel-wired-lan <intel-wired-lan-bounces@osuosl.org> On Behalf Of > Lobakin, Alexandr > Sent: Wednesday, December 8, 2021 7:37 PM > To: intel-wired-lan@lists.osuosl.org > Cc: Song Liu <songliubraving@fb.com>; Alexei Starovoitov <ast@kernel.org>; > Andrii Nakryiko <andrii@kernel.org>; Daniel Borkmann > <daniel@iogearbox.net>; John Fastabend <john.fastabend@gmail.com>; > Brouer, Jesper <brouer@redhat.com>; Yonghong Song <yhs@fb.com>; > Jesper Dangaard Brouer <hawk@kernel.org>; KP Singh > <kpsingh@kernel.org>; Jakub Kicinski <kuba@kernel.org>; > netdev@vger.kernel.org; linux-kernel@vger.kernel.org; David S. Miller > <davem@davemloft.net>; Björn Töpel <bjorn@kernel.org>; > bpf@vger.kernel.org; Martin KaFai Lau <kafai@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@redhat.com> > Suggested-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com> > Signed-off-by: Alexander Lobakin <alexandr.lobakin@intel.com> > Reviewed-by: Michal Swiatkowski <michal.swiatkowski@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@intel.com> A Contingent Worker at Intel
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