Physical Disks resources in Clusters in Windows

NTDEV
1

Hi,
I have two questions to ask:

  1. When I enumerate Physical Disk Resources I get something like "Disk G: "
    as the name of the resource. Is this resource name a reliable source to pick
    the drive letter from ?

  2. I am not getting any of the clusters being reported with the following
    approach . What could be wrong in the code?

Thnaks in advance.

Regards,

Arati

The code:

////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////

#include <windows.h>
#include <clusapi.h>
#include <resapi.h>
#include
#include

#include “ClusterResourceCtlInterface.h”
//for enum
//#include <chstring.h> //for CHString

using namespace std;

DWORD
MyCallbackFunction( HRESOURCE hSelf,
HRESOURCE hCurrentEnum,
PVOID pData );
bool getDriveLetter(string& var);

LPRESOURCE_CALLBACK g_pMyCallbackFunction = &MyCallbackFunction;

---------------------------------------------------------------------

int main (void)
{
//string strResType(“Physical Disk”); //getting all the physical disks
DWORD dwResult = ResUtilEnumResources(
0,
0,
//L"Physical Disk",
//reinterpret_cast(strResType.c_str()),
//Arati try L"Physical Disk"
g_pMyCallbackFunction,
NULL );
if( dwResult != ERROR_SUCCESS )
{
printf( “ResUtilEnumResources returned an error. %d”, dwResult );
return 1;
}
else
return 0;
}

-----------------------------------------------------------------------

DWORD MyCallbackFunction( HRESOURCE hSelf, HRESOURCE hCurrentEnum, PVOID
pData )
{
DWORD dwResult = ERROR_SUCCESS;
cout << “\n In call back function”;
DWORD cbListSize;
LPVOID lpValueList = ClusDocEx_ResGetControlCodeOutput(hCurrentEnum,
0,

CLUSCTL_RESOURCE_TYPE_STORAGE_GET_AVAILABLE_DISKS,
&cbListSize);
// Parse the buffer. The control code returns a value list.

CLUSPROP_BUFFER_HELPER cbh;
cbh.pb = (PBYTE) lpValueList;

DWORD cbPosition = 0;

while( 1 )
{
if( ( cbh. pPartitionInfoValue->Syntax.dw ==
CLUSPROP_SYNTAX_PARTITION_INFO ))
{
cout << “\n- Partition info found”;
cout << "\n\tThe drive letter is ";
cout << cbh. pPartitionInfoValue-> szDeviceName;

}
else if( cbh.pSyntax->dw == CLUSPROP_SYNTAX_ENDMARK )
// Reached the end of the list.
break;

// Add the size of the current entry to the position indicator
cbPosition += ClusDocEx_ListEntrySize( cbh.pValue->cbLength );

// Compare position indicator to the size of the list.
// Adding sizeof( DWORD ) allows for the read operation at the
// top of the loop.
if( ( cbPosition + sizeof( DWORD ) ) > cbListSize )
break;

// Advance cbh
cbh.pb += ClusDocEx_ListEntrySize( cbh.pValue->cbLength );

}
// End while.
return 1;
}

--------------------------------------------------------------</chstring.h></resapi.h></clusapi.h></windows.h>