FLT_PARAMETERS for IRP_MJ_QUERY_VOLUME_INFORMATION union

Union component used when the MajorFunction field of the FLT_IO_PARAMETER_BLOCK structure for the operation is IRP_MJ_QUERY_VOLUME_INFORMATION.

Syntax

typedef union _FLT_PARAMETERS {
  ...    ;
  struct {
    ULONG                                  Length;
    FS_INFORMATION_CLASS POINTER_ALIGNMENT FsInformationClass;
  } QueryVolumeInformation;
  PVOID  VolumeBuffer;
  ...    ;
} FLT_PARAMETERS, *PFLT_PARAMETERS;

Members

• QueryVolumeInformation: Structure containing the following members.

• Length: Length, in bytes, of the buffer at VolumeBuffer.

• FsInformationClass: Type of volume information that the file system returns. One of the following:

  Value	Meaning
  FileFsAttributeInformation	Return a FILE_FS_VOLUME_INFORMATION that contains information about the volume, such as the volume label, serial number, and creation time.
  FileFsControlInformation	Return a FILE_FS_CONTROL_INFORMATION structure that contains file system control information about the volume.
  FileFsDeviceInformation	Return a FILE_FS_DEVICE_INFORMATION structure that contains device information for the volume.
  FileFsDriverPathInformation	Return a FILE_FS_DRIVER_PATH_INFORMATION structure that contains information about whether a specified driver is in the I/O path for the volume. The originator of the IRP_MJ_QUERY_VOLUME_INFORMATION request must store the name of the driver into the FILE_FS_DRIVER_PATH_INFORMATION structure before sending the IRP to the file system volume device stack.
  FileFsFullSizeInformation	Return a FILE_FS_FULL_SIZE_INFORMATION structure that contains information about the total amount of space available on the volume.
  FileFsObjectIdInformation	Return a FILE_FS_OBJECTID_INFORMATION structure that contains file-system-specific object ID information for the volume. Note that this is not the same as the (globally unique identifier [GUID]-based) unique volume name that the operating system assigns.
  FileFsSizeInformation	Return a FILE_FS_SIZE_INFORMATION structure that contains information about the amount of space on the volume that is available to the user associated with the thread that originated the IRP_MJ_QUERY_VOLUME_INFORMATION request.
  FileFsVolumeInformation	Return a FILE_FS_VOLUME_INFORMATION that contains information about the volume, such as the volume label, serial number, and creation time.
  FileFsSectorSizeInformation	Return a FILE_FS_SECTOR_SIZE_INFORMATION structure that contains information about the physical and logical sector sizes of a volume.

• VolumeBuffer: Pointer to the output buffer where the volume information is to be returned.

Remarks

The FLT_PARAMETERS structure for IRP_MJ_QUERY_VOLUME_INFORMATION operations contains the parameters for an IRP-based query-volume-information operation represented by a callback data (FLT_CALLBACK_DATA) structure. It is contained in an FLT_IO_PARAMETER_BLOCK structure.

IRP_MJ_QUERY_VOLUME_INFORMATION is an IRP-based operation.

Requirements

See also

FILE_FS_ATTRIBUTE_INFORMATION

FILE_FS_CONTROL_INFORMATION

FILE_FS_DEVICE_INFORMATION

FILE_FS_DRIVER_PATH_INFORMATION

FILE_FS_FULL_SIZE_INFORMATION

FILE_FS_OBJECTID_INFORMATION

FILE_FS_SECTOR_SIZE_INFORMATION FILE_FS_SIZE_INFORMATION

FILE_FS_VOLUME_INFORMATION

FLT_CALLBACK_DATA

FLT_IO_PARAMETER_BLOCK

FLT_IS_FASTIO_OPERATION

FLT_IS_FS_FILTER_OPERATION

FLT_IS_IRP_OPERATION

FLT_PARAMETERS

IRP_MJ_QUERY_INFORMATION

ZwQueryVolumeInformationFile