vd_process_ioctl
rv = vd_process_ioctl(dev, DKIOCFLUSHWRITECACHE, NULL, FKIOCTL, &rval);
return (vd_process_ioctl(dev, cmd, (caddr_t)arg, mode, rvalp));
static int vd_process_ioctl(dev_t dev, int cmd, caddr_t arg, int mode,
return (vd_process_ioctl(dev, cmd, (caddr_t)arg, FKIOCTL, &rval));
rv = vd_process_ioctl(dev, DKIOCGGEOM, (caddr_t)&geom, FKIOCTL, &rval);
rv = vd_process_ioctl(dev, DKIOCGEXTVTOC, (caddr_t)&vtoc,