VD_OP_GET_CAPACITY
rv = vdc_do_sync_op(vdc, VD_OP_GET_CAPACITY, (caddr_t)vd_cap, alloc_len,
if (!VD_OP_SUPPORTED(vdc->operations, VD_OP_GET_CAPACITY))
ASSERT(request->operation == VD_OP_GET_CAPACITY);
{X(VD_OP_GET_CAPACITY), vd_get_capacity, NULL},
vd->operations |= VD_OP_MASK_READ | (1 << VD_OP_GET_CAPACITY);