nfs_getattrcache
if (nfs_getattrcache(ke->vp, &attr) != ENOENT)
int nfs_getattrcache(struct vnode *, struct vattr *);
if (error == 0 && nfs_getattrcache(vp, &vattr) == 0) {
if (nfs_getattrcache(vp, ap->a_vap) == 0)