bpf_stat
struct bpf_stat *bs = addr;
struct bpf_stat *__stats = \
struct bpf_stat *const stats = p;
struct bpf_stat *sum = arg;
struct bpf_stat sum;
static int bpf_stat(struct file *, struct stat *);
.fo_stat = bpf_stat,
bpf_gstats_percpu = percpu_alloc(sizeof(struct bpf_stat));
#define BIOCGSTATS _IOR('B', 111, struct bpf_stat)
struct bpf_stat bstat;
struct bpf_stat bpf_s;