nfs_renameit
static int nfs_renameit(struct vnode *sdvp, struct vnode *svp,
error = nfs_renameit(dvp, vp, cnp, sp);
int nfs_renameit(struct vnode *, struct componentname *, struct sillyrename *);
error = nfs_renameit(dvp, cnp, sp);
error = nfs_renameit(dvp, cnp, sp);