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A driver can use IOCTL_STORAGE_QUERY_PROPERTY to return properties of a storage device or adapter. The request indicates the kind of information to retrieve, such as inquiry data for a device or capabilities and limitations of an adapter. IOCTL_STORAGE_QUERY_PROPERTY can also be used to determine whether the port driver supports a particular property or which fields in the property descriptor can be modified with a subsequent change-property request.

Input Parameters

Parameters.DeviceIoControl.InputBufferLength indicates the size, in bytes, of the parameter buffer at Irp->AssociatedIrp.SystemBuffer, which must be >= sizeof(STORAGE_PROPERTY_QUERY).

Irp->AssociatedIrp.SystemBuffer contains STORAGE_PROPERTY_QUERY data that specifies whether to query the device or the adapter, the type of query to perform, and any additional parameters required for the query, such as the page code for a particular SCSI mode sense page. Device properties must be retrieved only from a device; attempting to retrieve device properties from an adapter will cause an error.

Parameters.DeviceIoControl.OutputBufferLength indicates the number of bytes that can be written to Irp->AssociatedIrp.SystemBuffer. OutputBufferLength can be zero to determine whether a property exists without retrieving its data.

Output Parameters

The driver returns query data to the buffer at Irp->AssociatedIrp.SystemBuffer. Varying amounts of bus-specific data can be appended to the structure. Cast the structure returned to a STORAGE_DESCRIPTOR_HEADER and check its Size member to determine the number of bytes the structure actually requires.

I/O Status Block

The Information field is set to the number of bytes returned. The Status field is set to STATUS_SUCCESS, or possibly to STATUS_INVALID_DEVICE_REQUEST, STATUS_INVALID_PARAMETER, or STATUS_NOT_SUPPORTED.



Ntddstor.h (include Ntddstor.h)

See also




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