mlxsw: spectrum_router: Store weight in nexthop struct

As the first step towards non-equal-cost multi-path support, store each
nexthop's weight.

For IPv6 nexthops always set the weight to 1, as it only supports ECMP.
Signed-off-by: NIdo Schimmel <idosch@mellanox.com>
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c

@@ -2203,6 +2203,7 @@ struct mlxsw_sp_nexthop {
 	struct mlxsw_sp_nexthop_key key;
 	unsigned char gw_addr[sizeof(struct in6_addr)];
 	int ifindex;
+	int nh_weight;
 	struct mlxsw_sp_rif *rif;
 	u8 should_offload:1, /* set indicates this neigh is connected and
 			      * should be put to KVD linear area of this group.
@@ -3045,6 +3046,11 @@ static int mlxsw_sp_nexthop4_init(struct mlxsw_sp *mlxsw_sp,
 
 	nh->nh_grp = nh_grp;
 	nh->key.fib_nh = fib_nh;
+#ifdef CONFIG_IP_ROUTE_MULTIPATH
+	nh->nh_weight = fib_nh->nh_weight;
+#else
+	nh->nh_weight = 1;
+#endif
 	memcpy(&nh->gw_addr, &fib_nh->nh_gw, sizeof(fib_nh->nh_gw));
 	err = mlxsw_sp_nexthop_insert(mlxsw_sp, nh);
 	if (err)
@@ -4304,6 +4310,7 @@ static int mlxsw_sp_nexthop6_init(struct mlxsw_sp *mlxsw_sp,
 	struct net_device *dev = rt->dst.dev;
 
 	nh->nh_grp = nh_grp;
+	nh->nh_weight = 1;
 	memcpy(&nh->gw_addr, &rt->rt6i_gateway, sizeof(nh->gw_addr));
 	mlxsw_sp_nexthop_counter_alloc(mlxsw_sp, nh);