Re: [iproute2-next v2 4/4] vdpa: Enable user to set mtu of the vdpa device

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On 12/17/21 1:08 AM, Parav Pandit wrote:
> @@ -204,6 +217,8 @@ static void vdpa_opts_put(struct nlmsghdr *nlh, struct vdpa *vdpa)
>  	if (opts->present & VDPA_OPT_VDEV_MAC)
>  		mnl_attr_put(nlh, VDPA_ATTR_DEV_NET_CFG_MACADDR,
>  			     sizeof(opts->mac), opts->mac);
> +	if (opts->present & VDPA_OPT_VDEV_MTU)
> +		mnl_attr_put_u16(nlh, VDPA_ATTR_DEV_NET_CFG_MTU, opts->mtu);

Why limit the MTU to a u16? Eric for example is working on "Big TCP"
where IPv6 can work with Jumbograms where mtu can be > 64k.

https://datatracker.ietf.org/doc/html/rfc2675

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