From 0f5f7d7bf6e6bda4dffe7b42812a16ada6ea9816 Mon Sep 17 00:00:00 2001
From: David Ahern <dsahern@gmail.com>
Date: Fri, 5 Apr 2019 16:30:29 -0700
Subject: ipv4: Add support to rtable for ipv6 gateway

Add support for an IPv6 gateway to rtable. Since a gateway is either
IPv4 or IPv6, make it a union with rt_gw4 where rt_gw_family decides
which address is in use.

When dumping the route data, encode an ipv6 nexthop using RTA_VIA.

Signed-off-by: David Ahern <dsahern@gmail.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'drivers')

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
index 133a497e3457..560a60e522f9 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
@@ -318,6 +318,9 @@ mlxsw_sp_span_gretap4_route(const struct net_device *to_dev,
 	*saddrp = fl4.saddr;
 	if (rt->rt_gw_family == AF_INET)
 		*daddrp = rt->rt_gw4;
+	/* can not offload if route has an IPv6 gateway */
+	else if (rt->rt_gw_family == AF_INET6)
+		dev = NULL;
 
 out:
 	ip_rt_put(rt);
-- 
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