static unsigned long bpf_xdp_copy(void *dst_buff, const void *src_buff,
				  unsigned long off, unsigned long len)
{
	memcpy(dst_buff, src_buff + off, len);
	return 0;
}
static unsigned long bpf_xdp_copy(void *dst_buff, const void *src_buff,
				  unsigned long off, unsigned long len)
{
	memcpy(dst_buff, src_buff + off, len);
	return 0;
}