> SIT currently uses ip_tunnel_get_iflink() which reads tunnel->parms.link.
> In order to decouple SIT parameter handling from ip_tunnel, implement
> its own ndo_get_iflink callback.
> 
> Signed-off-by: Eric Dumazet <edumazet@google.com>

Acked-by: Lorenzo Bianconi <lorenzo.bianconi@oss.qualcomm.com>

> ---
>  net/ipv6/sit.c | 9 ++++++++-
>  1 file changed, 8 insertions(+), 1 deletion(-)
> 
> diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
> index 7cabcd3afbc4f06d9a08374e6d8df2fb1bfb9676..35c6695909014a2c335f1de7afb48f07b7c91c39 100644
> --- a/net/ipv6/sit.c
> +++ b/net/ipv6/sit.c
> @@ -1444,12 +1444,19 @@ ipip6_tunnel_siocdevprivate(struct net_device *dev, struct ifreq *ifr,
>  	}
>  }
>  
> +static int ipip6_get_iflink(const struct net_device *dev)
> +{
> +	struct ip_tunnel *tunnel = netdev_priv(dev);
> +
> +	return READ_ONCE(tunnel->parms.link);
> +}
> +
>  static const struct net_device_ops ipip6_netdev_ops = {
>  	.ndo_init	= ipip6_tunnel_init,
>  	.ndo_uninit	= ipip6_tunnel_uninit,
>  	.ndo_start_xmit	= sit_tunnel_xmit,
>  	.ndo_siocdevprivate = ipip6_tunnel_siocdevprivate,
> -	.ndo_get_iflink = ip_tunnel_get_iflink,
> +	.ndo_get_iflink = ipip6_get_iflink,
>  	.ndo_tunnel_ctl = ipip6_tunnel_ctl,
>  };
>  
> -- 
> 2.55.0.979.g7e5102b832-goog
>