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Re: [RFC net-next 07/18] tun: set offloaded xdp program

From: Jason Wang
Subject: Re: [RFC net-next 07/18] tun: set offloaded xdp program
Date: Mon, 2 Dec 2019 10:47:15 +0800
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0

On 2019/12/2 上午12:45, David Ahern wrote:
On 11/26/19 4:07 AM, Prashant Bhole wrote:
From: Jason Wang <address@hidden>

This patch introduces an ioctl way to set an offloaded XDP program
to tun driver. This ioctl will be used by qemu to offload XDP program
from virtio_net in the guest.

Seems like you need to set / reset the SOCK_XDP flag on tfile->sk since
this is an XDP program.

Also, why not add this program using netlink instead of ioctl? e.g., as
part of a generic XDP in the egress path like I am looking into for the
host side.

Maybe both, otherwise, qemu may need netlink as a dependency.


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