bpf_mkobj_ops
return bpf_mkobj_ops(dentry, mode, arg, &bpf_prog_iops,
return bpf_mkobj_ops(dentry, mode, arg, &bpf_map_iops,
return bpf_mkobj_ops(dentry, mode, arg, &bpf_link_iops,
ret = bpf_mkobj_ops(dentry, mode, link, &bpf_link_iops,