FLT_VOLUME_PROPERTIES structure (fltkernel.h)
The FLT_VOLUME_PROPERTIES structure is passed as a parameter to FltGetVolumeProperties.
Syntax
typedef struct _FLT_VOLUME_PROPERTIES {
DEVICE_TYPE DeviceType;
ULONG DeviceCharacteristics;
ULONG DeviceObjectFlags;
ULONG AlignmentRequirement;
USHORT SectorSize;
USHORT Flags;
UNICODE_STRING FileSystemDriverName;
UNICODE_STRING FileSystemDeviceName;
UNICODE_STRING RealDeviceName;
} FLT_VOLUME_PROPERTIES, *PFLT_VOLUME_PROPERTIES;
Members
DeviceType
Receives the device type of the volume. Must be a valid storage device type, such as one of the following values defined in ntifs.h:
FILE_DEVICE_CD_ROM
FILE_DEVICE_DISK
FILE_DEVICE_DVD
FILE_DEVICE_MASS_STORAGE
FILE_DEVICE_NETWORK
FILE_DEVICE_VIRTUAL_DISK
For more information, see Specifying Device Types.
DeviceCharacteristics
Receives the device characteristics of the volume. For more information, see the reference entry for IoCreateDevice.
DeviceObjectFlags
Receives the device object flags for the volume. For more information about these flags, see the reference entries for IoRegisterFileSystem and DEVICE_OBJECT.
AlignmentRequirement
Receives the buffer alignment required by the underlying device. The value must be one of the FILE_xxxx_ALIGNMENT values defined in ntifs.h. For more information, see DEVICE_OBJECT and Initializing a Device Object.
SectorSize
Receives the volume sector size, in bytes.
Flags
Provides additional description of the volume. This member can be zero or one of the following flags. In versions prior to Windows 10, version 1607, this member was named Reserved0 and reserved for system use.
| Value | Meaning |
|---|---|
|
This flag indicates that the volume is a direct access (DAX) volume. |
FileSystemDriverName
UNICODE_STRING structure that receives the service name of the file system that is mounted on this volume. The buffer for this Unicode string is contiguous with this structure and does not need to be initialized before calling FltGetVolumeProperties.
FileSystemDeviceName
UNICODE_STRING structure that receives the name of the file system device object associated with this volume. The buffer for this Unicode string is contiguous with this structure and does not need to be initialized before calling FltGetVolumeProperties.
RealDeviceName
UNICODE_STRING structure that receives the name of the storage device object associated with this volume. This structure is empty for network file systems. The buffer for this Unicode string is contiguous with this structure and does not need to be initialized before calling FltGetVolumeProperties.
Remarks
Storage for the FLT_VOLUME_PROPERTIES structure is typically allocated from paged pool.
To get the volume name for a given volume, call FltGetVolumeName.
To get the volume globally unique identifier (GUID) name for a given volume, call FltGetVolumeGuidName.
Requirements
| Requirement | Value |
|---|---|
| Header | fltkernel.h (include Fltkernel.h) |
See also
FltGetVolumeName