bpf_stat
#define BIOCGSTATS _IOR(B,111, struct bpf_stat)
#define BIOCGSTATS _IOR('B',111, struct bpf_stat)
struct bpf_stat *bs = (struct bpf_stat *)addr;
#define BIOCGSTATS _IOR('B', 111, struct bpf_stat)
struct bpf_stat us;