netdev - Re: [PATCH 1/1] tun: change speed from 10M to dynamically configured

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Date:	Fri, 13 Feb 2015 13:45:09 +0300
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	Zhu Yanjun <Yanjun.Zhu@...driver.com>, netdev@...r.kernel.org,
	mst@...hat.com, jasowang@...hat.com, viro@...iv.linux.org.uk,
	davem@...emloft.net, jonathon.reinhart@...il.com
Subject: Re: [PATCH 1/1] tun: change speed from 10M to dynamically configured

On 2/13/2015 9:19 AM, Zhu Yanjun wrote:

> The default speed of normal nic is 1000M while the default speed
> of tun is 10M. Now the default speed of tun is changed to 1000M.
> And there are 3 options: 10M, 100M and 1000M to the speed of tun.
> The command "ethtool -s tun0 speed 10/100/1000" can configure the
> speed of tun dynamically.

> CC: Michael S. Tsirkin <mst@...hat.com>
> CC: Jason Wang <jasowang@...hat.com>
> CC: Al Viro <viro@...iv.linux.org.uk>
> Reviewed-by: Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
> Reviewed-by: Jonathon Reinhart <jonathon.reinhart@...il.com>
> Signed-off-by: Zhu Yanjun <Yanjun.Zhu@...driver.com>

[...]

> diff --git a/include/uapi/linux/if_tun.h b/include/uapi/linux/if_tun.h
> index 50ae243..78a09a7 100644
> --- a/include/uapi/linux/if_tun.h
> +++ b/include/uapi/linux/if_tun.h
> @@ -66,6 +66,11 @@
>   #define IFF_PERSIST	0x0800
>   #define IFF_NOFILTER	0x1000
>
> +/*add speed control, default 1000M*/

    Please do add spaces after /* and before */.

> +#define TUN_CTRL_SPD_10         0x0020
> +#define TUN_CTRL_SPD_100        0x0040
> +#define TUN_CTRL_SPD_1000       0x0080
> +
>   /* Socket options */
>   #define TUN_TX_TIMESTAMP 1

WBR, Sergei

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