Re: [PATCH 4/4] tun: indicate support for USO feature

[Jason Wang]

在 2021/5/11 下午12:42, Yuri Benditovich 写道:
> Signed-off-by: Yuri Benditovich <yuri.benditovich@xxxxxxxxxx>
> ---
>   drivers/net/tun.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/tun.c b/drivers/net/tun.c
> index 84f832806313..a35054f9d941 100644
> --- a/drivers/net/tun.c
> +++ b/drivers/net/tun.c
> @@ -2812,7 +2812,7 @@ static int set_offload(struct tun_struct *tun, unsigned long arg)
>   			arg &= ~(TUN_F_TSO4|TUN_F_TSO6);
>   		}
>   
> -		arg &= ~TUN_F_UFO;
> +		arg &= ~(TUN_F_UFO|TUN_F_USO);


It looks to me kernel doesn't use "USO", so TUN_F_UDP_GSO_L4 is a better 
name for this and I guess we should toggle NETIF_F_UDP_GSO_l4 here?

And how about macvtap?

Thanks


>   	}
>   
>   	/* This gives the user a way to test for new features in future by