IFLA_BRIDGE_MRP_IN_ROLE_I_IFINDEX
[IFLA_BRIDGE_MRP_IN_ROLE_I_IFINDEX] = { .type = NLA_U32 },
!tb[IFLA_BRIDGE_MRP_IN_ROLE_I_IFINDEX] ||
role.i_ifindex = nla_get_u32(tb[IFLA_BRIDGE_MRP_IN_ROLE_I_IFINDEX]);