netdev - Re: [PATCH v2] IPv4: RTM_GETROUTE: Add RTA

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Date:   Fri, 13 Nov 2020 09:44:38 -0700
From:   David Ahern <dsahern@...il.com>
To:     Oliver Herms <oliver.peter.herms@...il.com>, netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuznet@....inr.ac.ru, yoshfuji@...ux-ipv6.org,
        kuba@...nel.org
Subject: Re: [PATCH v2] IPv4: RTM_GETROUTE: Add RTA_ENCAP to result

On 11/13/20 1:55 AM, Oliver Herms wrote:
> This patch adds an IPv4 routes encapsulation attribute
> to the result of netlink RTM_GETROUTE requests
> (e.g. ip route get 192.0.2.1).
> 
> Signed-off-by: Oliver Herms <oliver.peter.herms@...il.com>
> ---
>  net/ipv4/route.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/net/ipv4/route.c b/net/ipv4/route.c
> index 1d7076b78e63..0fbb4adee3d4 100644
> --- a/net/ipv4/route.c
> +++ b/net/ipv4/route.c
> @@ -2860,6 +2860,9 @@ static int rt_fill_info(struct net *net, __be32 dst, __be32 src,
>  	if (rt->dst.dev &&
>  	    nla_put_u32(skb, RTA_OIF, rt->dst.dev->ifindex))
>  		goto nla_put_failure;
> +	if (rt->dst.lwtstate &&
> +	    lwtunnel_fill_encap(skb, rt->dst.lwtstate, RTA_ENCAP, RTA_ENCAP_TYPE) < 0)
> +		goto nla_put_failure;
>  #ifdef CONFIG_IP_ROUTE_CLASSID
>  	if (rt->dst.tclassid &&
>  	    nla_put_u32(skb, RTA_FLOW, rt->dst.tclassid))
> 

Reviewed-by: David Ahern <dsahern@...nel.org>