mlxsw: spectrum_ipip: Extract mlxsw_sp_l3addr_is_zero

Extract the logic for determining whether a given IPv4/IPv6 address is
all-zeroes from mlxsw_sp_ipip_tunnel_complete to a separate function.
Make that function public within the module.

Signed-off-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_ipip.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_ipip.c
index a1c4b1e..0378ccc 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_ipip.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_ipip.c
@@ -1,7 +1,7 @@
 /*
  * drivers/net/ethernet/mellanox/mlxsw/spectrum_ipip.c
- * Copyright (c) 2017 Mellanox Technologies. All rights reserved.
- * Copyright (c) 2017 Petr Machata <petrm@mellanox.com>
+ * Copyright (c) 2017-2018 Mellanox Technologies. All rights reserved.
+ * Copyright (c) 2017-2018 Petr Machata <petrm@mellanox.com>
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
@@ -122,6 +122,13 @@ mlxsw_sp_ipip_netdev_daddr(enum mlxsw_sp_l3proto proto,
        return (union mlxsw_sp_l3addr) {0};
 }
 
+bool mlxsw_sp_l3addr_is_zero(union mlxsw_sp_l3addr addr)
+{
+       union mlxsw_sp_l3addr naddr = {0};
+
+       return !memcmp(&addr, &naddr, sizeof(naddr));
+}
+
 static int
 mlxsw_sp_ipip_nexthop_update_gre4(struct mlxsw_sp *mlxsw_sp, u32 adj_index,
                                  struct mlxsw_sp_ipip_entry *ipip_entry)
@@ -215,15 +222,14 @@ static bool mlxsw_sp_ipip_tunnel_complete(enum mlxsw_sp_l3proto proto,
 {
        union mlxsw_sp_l3addr saddr = mlxsw_sp_ipip_netdev_saddr(proto, ol_dev);
        union mlxsw_sp_l3addr daddr = mlxsw_sp_ipip_netdev_daddr(proto, ol_dev);
-       union mlxsw_sp_l3addr naddr = {0};
 
        /* Tunnels with unset local or remote address are valid in Linux and
         * used for lightweight tunnels (LWT) and Non-Broadcast Multi-Access
         * (NBMA) tunnels. In principle these can be offloaded, but the driver
         * currently doesn't support this. So punt.
         */
-       return memcmp(&saddr, &naddr, sizeof(naddr)) &&
-              memcmp(&daddr, &naddr, sizeof(naddr));
+       return !mlxsw_sp_l3addr_is_zero(saddr) &&
+              !mlxsw_sp_l3addr_is_zero(daddr);
 }
 
 static bool mlxsw_sp_ipip_can_offload_gre4(const struct mlxsw_sp *mlxsw_sp,

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_ipip.h b/drivers/net/ethernet/mellanox/mlxsw/spectrum_ipip.h
index a4ff573..888f190 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_ipip.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_ipip.h
@@ -1,7 +1,7 @@
 /*
  * drivers/net/ethernet/mellanox/mlxsw/spectrum_ipip.h
- * Copyright (c) 2017 Mellanox Technologies. All rights reserved.
- * Copyright (c) 2017 Petr Machata <petrm@mellanox.com>
+ * Copyright (c) 2017-2018 Mellanox Technologies. All rights reserved.
+ * Copyright (c) 2017-2018 Petr Machata <petrm@mellanox.com>
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
@@ -46,6 +46,8 @@ union mlxsw_sp_l3addr
 mlxsw_sp_ipip_netdev_saddr(enum mlxsw_sp_l3proto proto,
                           const struct net_device *ol_dev);
 
+bool mlxsw_sp_l3addr_is_zero(union mlxsw_sp_l3addr addr);
+
 enum mlxsw_sp_ipip_type {
        MLXSW_SP_IPIP_TYPE_GRE4,
        MLXSW_SP_IPIP_TYPE_MAX,