IFLA_XDP_EXPECTED_FD
[IFLA_XDP_UNSPEC] = { .strict_start_type = IFLA_XDP_EXPECTED_FD },
[IFLA_XDP_EXPECTED_FD] = { .type = NLA_S32 },
if (!xdp[IFLA_XDP_EXPECTED_FD]) {
nla_get_s32(xdp[IFLA_XDP_EXPECTED_FD]);
ret = nlattr_add(&req, IFLA_XDP_EXPECTED_FD, &old_fd,