#ifndef __BPF_SYS__
#define __BPF_SYS__
#include <sys/syscall.h>
#include <linux/bpf.h>
static inline __u64 bpf_ptr_to_u64(const void *ptr)
{
return (__u64) (unsigned long) ptr;
}
static inline int bpf_lookup_elem(int fd, void *key, void *value)
{
union bpf_attr attr = {
.map_fd = fd,
.key = bpf_ptr_to_u64(key),
.value = bpf_ptr_to_u64(value),
};
return syscall(__NR_bpf, BPF_MAP_LOOKUP_ELEM, &attr, sizeof(attr));
}
#endif /* __BPF_SYS__ */