qlt_ioctl_mbox_t
if ((iocd->stmf_ibuf_size < sizeof (qlt_ioctl_mbox_t)) ||
(iocd->stmf_obuf_size < sizeof (qlt_ioctl_mbox_t))) {
bcopy(ibuf, mcp, sizeof (qlt_ioctl_mbox_t));
bcopy(mcp, obuf, sizeof (qlt_ioctl_mbox_t));