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Date:   Mon, 2 Dec 2019 10:47:15 +0800
From:   Jason Wang <>
To:     David Ahern <>,
        Prashant Bhole <>,
        "David S . Miller" <>,
        "Michael S . Tsirkin" <>
Cc:     Alexei Starovoitov <>,
        Daniel Borkmann <>,
        Jakub Kicinski <>,
        Jesper Dangaard Brouer <>,
        John Fastabend <>,
        Martin KaFai Lau <>,
        Song Liu <>, Yonghong Song <>,
        Andrii Nakryiko <>,,,
Subject: Re: [RFC net-next 07/18] tun: set offloaded xdp program

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