IFLA_XDP_MAX
static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = {
struct nlattr *xdp[IFLA_XDP_MAX + 1];
err = nla_parse_nested_deprecated(xdp, IFLA_XDP_MAX,
struct nlattr *tb[IFLA_XDP_MAX + 1];
if (libbpf_nla_parse_nested(tb, IFLA_XDP_MAX, attr, NULL) < 0)
struct nlattr *xdp_tb[IFLA_XDP_MAX + 1];
ret = libbpf_nla_parse_nested(xdp_tb, IFLA_XDP_MAX, tb[IFLA_XDP], NULL);