vdc_strategy
static int vdc_strategy(struct buf *buf);
return (physio(vdc_strategy, NULL, dev, B_READ, vdc_min, uio));
return (physio(vdc_strategy, NULL, dev, B_WRITE, vdc_min, uio));
return (aphysio(vdc_strategy, anocancel, dev, B_READ, vdc_min, aio));
return (aphysio(vdc_strategy, anocancel, dev, B_WRITE, vdc_min, aio));
vdc_strategy, /* cb_strategy */
status = physio(vdc_strategy, buf, VD_MAKE_DEV(vdc->instance, 0),