CLUSCTL_RESOURCE_TYPE_STORAGE_GET_AVAILABLE_DISKS control code

Article
05/31/2018

Retrieves information about storage class devices supported by a resource type. Applications use this control code as a parameter to the ClusterResourceTypeControl function, and resource DLLs receive the control code as a parameter to the ResourceTypeControl callback function.

ClusterResourceTypeControl( hCluster,                  // cluster handle
                            lpszResTypeName,           // resource type name
                            hHostNode,                 // optional host node
                            CLUSCTL_RESOURCE_TYPE_STORAGE_GET_AVAILABLE_DISKS, 
                            NULL,                      // input buffer (not used)
                            0,                         // input buffer size (not used)
                            lpOutBuffer,               // output buffer: value list
                            cbOutBufferSize,           // allocated buffer size (bytes)
                            lpcbBytesReturned );       // size of returned data (bytes)

Parameters

The following control code function and DLL support parameter is specific to this control code. For complete parameter descriptions, see ClusterResourceTypeControl or ResourceTypeControl.

lpOutBuffer

On a successful return, points to a value list describing all available storage class devices in the cluster supported by the resource type specified by lpszResTypeName.

For information on the format of this list see Value Lists for Storage Class Resources.
A storage class device is available if it is not currently owned by a node. Because resources are always owned by a node at any point in time, storage class devices configured as resources will not be included in the returned value list.
Any given storage class resource can appear more than once in the list.

Return value

ClusterResourceTypeControl returns one of the following values.

ERROR_SUCCESS

The operation completed successfully. The lpcbBytesReturned parameter points to the actual size of the returned data.

ERROR_MORE_DATA

234 (0xEA)

More data is available. The output buffer pointed to by lpOutBuffer was not large enough to hold the data resulting from the operation. The lpcbBytesReturned parameter points to the size required for the output buffer.

System error code

If any other value is returned, then the operation failed. The value of lpcbBytesReturned is unreliable.

Implementations of ResourceTypeControl can return the above values or the following value:

ERROR_INVALID_FUNCTION

Requests that the Resource Monitor perform default processing (if any) for the control code addition to processing supplied by the DLL (if any).

Remarks

For examples of using CLUSCTL_RESOURCE_TYPE_STORAGE_GET_AVAILABLE_DISKS, see Creating a Physical Disk Resource. For information on accessing the data in a value list, see Parsing a Value List.

ClusAPI.h defines the 32 bits of CLUSCTL_RESOURCE_TYPE_STORAGE_GET_AVAILABLE_DISKS as follows.

Component	Bit location	Value
Object code	24 31	CLUS_OBJECT_RESOURCE_TYPE (0x2)
Global bit	23	CLUS_NOT_GLOBAL (0x0)
Modify bit	22	CLUS_NO_MODIFY (0x0)
User bit	21	CLCTL_CLUSTER_BASE (0x0)
Type bit	20	External (0x0)
Operation code	0 23	CLCTL_GET_AVAILABLE_DISKS
Access code	0 1	CLUS_ACCESS_READ (0x1)

For more information, see Control Code Architecture.

Resource DLL Support

Conditional. If your DLL handles quorum-capable resource storage class resources, you must support the CLUSCTL_RESOURCE_TYPE_STORAGE_GET_AVAILABLE_DISKS control code. Create and return a value list formatted as described under lpOutBuffer. For more information, see Creating a Value List and Implementing ResourceTypeControl.

Otherwise, return ERROR_INVALID_FUNCTION.

Requirements


Minimum supported client	None supported
Minimum supported server	Windows Server 2008 Enterprise, Windows Server 2008 Datacenter
Header	ClusAPI.h

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