IFLA_GRE_FLAGS
{ .type = IFLA_GRE_FLAGS, .off = _OUT(ifla_flags), .cb = nlattr_get_uint32 },
if (error == 0 && nl_has_attr(&bm, IFLA_GRE_FLAGS))
nlattr_add_u32(nw, IFLA_GRE_FLAGS, sc->gre_options);
snl_add_msg_attr_u32(&nw, IFLA_GRE_FLAGS, (GRE_ENABLE_SEQ | GRE_ENABLE_CSUM));
{ .type = IFLA_GRE_FLAGS, .off = _OUT(ifla_flags), .cb = snl_attr_get_uint32 },