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Help for finding Lun nos in Kernel

Hi All,

I am trying to write a driver to support vendorspecific read/writes to a IOSCSIPERIPHERALDeviceType00 with multiple LUN's. For this I am in need to differentiate between the lun's.

1) Is there any way I can set separate Iokit personalities for each LUN under same vendorstring and productstring.?

2) For differentiating the LUN's I am trying to get the lun no as shown below

bool
com_user_VendorSpecificType00::start ( IOService *provider )
{

   OSDictionary *		dict = NULL;
   char *			VendorString = NULL;
   char *			ProductString = NULL;
   SCSITaskIdentifier 		getscsi;
   SCSITask *			scsiRequest;
   UInt8  			LUNno = 0;

   if ( !super::start ( provider ) )
   {
       return false;
   }
   registerService();

dict = GetProtocolCharacteristicsDictionary ( );
if ( dict != NULL )
{
VendorString = GetVendorString ();
ProductString = GetProductString ();
//Checking for Vendor and ProductString to identify the device
if ( ((strcmp ( VendorString, "Generic" )) && (strcmp ( ProductString, "device" ))) == 0 )
{
getscsi = GetSCSITask( );
scsiRequest = OSDynamicCast ( SCSITask, getscsi);
LUNno = scsiRequest->GetLogicalUnitNumber();
STATUS_LOG ( ( " LUN no = %d\n", LUNno) );
//Here is the problem the LUN no returns 0 for all the luns I have.
}

   }
   return true;
}

When I do the above I am getting the LunNo as 0 for all the LUN's I have.

Thanks for your help
Rajagovarthanan.


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