rumpfs_update
(void)rumpfs_update(RUMPFS_ACCESS, vp, &ts, &ts, &ts);
(void)rumpfs_update(RUMPFS_MODIFY, vp, &ts, &ts, &ts);
error = rumpfs_update(flags, vp, &vap->va_atime, &vap->va_mtime, &now);