>-----Original Message-----
>From: Intel-wired-lan <intel-wired-lan-bounces@xxxxxxxxxx> On Behalf Of
>Kurt Kanzenbach
>Sent: Monday, April 12, 2021 3:47 PM
>To: Brandeburg, Jesse <jesse.brandeburg@xxxxxxxxx>; Nguyen, Anthony L
><anthony.l.nguyen@xxxxxxxxx>; David S. Miller <davem@xxxxxxxxxxxxx>;
>Jakub Kicinski <kuba@xxxxxxxxxx>
>Cc: Kurt Kanzenbach <kurt@xxxxxxxxxxxxx>; Jesper Dangaard Brouer
><hawk@xxxxxxxxxx>; Daniel Borkmann <daniel@xxxxxxxxxxxxx>;
>netdev@xxxxxxxxxxxxxxx; Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>;
>Ilias Apalodimas <ilias.apalodimas@xxxxxxxxxx>; Alexei Starovoitov
><ast@xxxxxxxxxx>; intel-wired-lan@xxxxxxxxxxxxxxxx; bpf@xxxxxxxxxxxxxxx;
>Lorenzo Bianconi <lorenzo@xxxxxxxxxx>
>Subject: [Intel-wired-lan] [PATCH RFC net] igb: Fix XDP with PTP enabled
>
>When using native XDP with the igb driver, the XDP frame data doesn't point
>to the beginning of the packet. It's off by 16 bytes. Everything works as
>expected with XDP skb mode.
>
>Actually these 16 bytes are used to store the packet timestamps. Therefore,
>pull the timestamp before executing any XDP operations and adjust all other
>code accordingly. The igc driver does it like that as well.
>
>Tested with Intel i210 card and AF_XDP sockets.
>
>Fixes: 9cbc948b5a20 ("igb: add XDP support")
>Signed-off-by: Kurt Kanzenbach <kurt@xxxxxxxxxxxxx>
>---
> drivers/net/ethernet/intel/igb/igb.h | 3 +-
> drivers/net/ethernet/intel/igb/igb_main.c | 45 ++++++++++++-----------
>drivers/net/ethernet/intel/igb/igb_ptp.c | 18 ++++-----
> 3 files changed, 32 insertions(+), 34 deletions(-)
>
Tested-by: Sandeep Penigalapati <sandeep.penigalapati@xxxxxxxxx>
