nfsrv_sattr
int nfsrv_sattr(struct nfsrv_descript *, vnode_t, struct nfsvattr *,
(error = nfsrv_sattr(nd, NULL, nvap, NULL, NULL, NULL, p)))
error = nfsrv_sattr(nd, NULL, &nva, NULL, NULL,
error = nfsrv_sattr(nd, NULL, &nva, &attrbits, aclp, daclp, p);
error = nfsrv_sattr(nd, NULL, &nva, NULL, NULL, NULL,
error = nfsrv_sattr(nd, vp, &nva, &attrbits, aclp, daclp, p);