kern_fhstat
error = kern_fhstat(td, fh, &sb);
error = kern_fhstat(td, fh, &sb);
error = kern_fhstat(td, fh, &sb);
error = kern_fhstat(td, fh, &sb);
int kern_fhstat(struct thread *td, fhandle_t fh, struct stat *buf);