static int get_device_type(SCSIDiskState *s)

{

    BlockDriverState *bdrv = s->qdev.conf.bs;

    uint8_t cmd[16];

    uint8_t buf[36];

    uint8_t sensebuf[8];

    sg_io_hdr_t io_header;

    int ret;



    memset(cmd, 0, sizeof(cmd));

    memset(buf, 0, sizeof(buf));

    cmd[0] = INQUIRY;

    cmd[4] = sizeof(buf);



    memset(&io_header, 0, sizeof(io_header));

    io_header.interface_id = 'S';

    io_header.dxfer_direction = SG_DXFER_FROM_DEV;

    io_header.dxfer_len = sizeof(buf);

    io_header.dxferp = buf;

    io_header.cmdp = cmd;

    io_header.cmd_len = sizeof(cmd);

    io_header.mx_sb_len = sizeof(sensebuf);

    io_header.sbp = sensebuf;

    io_header.timeout = 6000; 



    ret = bdrv_ioctl(bdrv, SG_IO, &io_header);

    if (ret < 0 || io_header.driver_status || io_header.host_status) {

        return -1;

    }

    s->qdev.type = buf[0];

    if (buf[1] & 0x80) {

        s->features |= 1 << SCSI_DISK_F_REMOVABLE;

    }

    return 0;

}
