From: Petr Machata Date: Fri, 3 Nov 2017 09:03:39 +0000 (+0100) Subject: mlxsw: spectrum_router: Fix saddr deduction in mlxsw_sp_ipip_entry_create() X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=4526cc8aed2b4bf481709911fc1fee9f040ccda1;p=linux.git mlxsw: spectrum_router: Fix saddr deduction in mlxsw_sp_ipip_entry_create() When trying to determine whether there are other offloaded tunnels with the same local address, mlxsw_sp_ipip_entry_create() should look for a tunnel with matching UL protocol, matching saddr, in the same VRF. However instead of taking into account the UL protocol of the tunnel netdevice (which mlxsw_sp_ipip_entry_saddr_matches() then compares to the UL protocol of inspected IPIP entry), it deduces the UL protocol from the inspected IPIP entry (and that's compared to itself). This is currently immaterial, because only one tunnel type is offloaded, and therefore the UL protocol always matches, but introducing support for a tunnel with IPv6 underlay would uncover this error. Signed-off-by: Petr Machata Reviewed-by: Ido Schimmel Signed-off-by: Jiri Pirko Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c index 1376a9738b3ca..897a3841e52f9 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c @@ -1169,10 +1169,10 @@ mlxsw_sp_ipip_entry_create(struct mlxsw_sp *mlxsw_sp, * in the same underlay table needs special treatment in the HW. That is * currently not implemented in the driver. */ + ul_proto = router->ipip_ops_arr[ipipt]->ul_proto; + saddr = mlxsw_sp_ipip_netdev_saddr(ul_proto, ol_dev); list_for_each_entry(ipip_entry, &mlxsw_sp->router->ipip_list, ipip_list_node) { - ul_proto = router->ipip_ops_arr[ipip_entry->ipipt]->ul_proto; - saddr = mlxsw_sp_ipip_netdev_saddr(ul_proto, ol_dev); if (mlxsw_sp_ipip_entry_saddr_matches(mlxsw_sp, ul_proto, saddr, ul_tb_id, ipip_entry)) return ERR_PTR(-EEXIST);