This patch adds support for ioctls to ub, with the help of scsi_ioctl_cmd().
Now ub can eject CDs. But do not try to burn CDs yet, it's not tested.

Original patch from Peter Jones (aka deviant-).
Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>