BIO_READ
if ((bp->bio_cmd & BIO_READ) == BIO_READ) {
bp->b_iocmd = BIO_READ;
if (bp->b_iocmd == BIO_READ) {
if (iocmd == BIO_READ) {
rabp->b_iocmd = BIO_READ;
bp->b_iocmd = BIO_READ;
bp->b_iocmd = BIO_READ;
bp->b_iocmd = BIO_READ;
bp->b_iocmd = BIO_READ;
rabp->b_iocmd = BIO_READ;
if (bp->b_iocmd == BIO_READ)
if (bp->b_iocmd == BIO_READ)