ufs_dirlook
if (err = ufs_dirlook(tdp, namep, ipp, cr, 0, 0)) {
error = ufs_dirlook(ip, nm, &xip, cr, 1, 0);
if (error = ufs_dirlook(sdp, snm, &sip, cr, 0, 0)) {
if ((error = ufs_dirlook(ip, nm, &xip, cr, 1, 1)) == 0) {
extern int ufs_dirlook(struct inode *, char *, struct inode **,