#ifndef _NTIOAPI_H

typedef struct _FILE_FS_DEVICE_INFORMATION
{
    DEVICE_TYPE DeviceType;
    ULONG Characteristics;
} FILE_FS_DEVICE_INFORMATION, *PFILE_FS_DEVICE_INFORMATION;

#endif
View code on GitHub

// wdm.h

typedef struct _FILE_FS_DEVICE_INFORMATION {
  DEVICE_TYPE DeviceType;
  ULONG       Characteristics;
} FILE_FS_DEVICE_INFORMATION, *PFILE_FS_DEVICE_INFORMATION;
View the official Windows Driver Kit DDI reference

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Windows Driver Kit DDI reference (ns-wdm-_file_fs_device_information)

_FILE_FS_DEVICE_INFORMATION structure

Description

The FILE_FS_DEVICE_INFORMATION structure provides file system device information about the type of device object associated with a file object.

Members

`DeviceType`

Set when a driver calls IoCreateDevice as appropriate for the type of underlying device. For more information, see Specifying Device Types.

`Characteristics`

The device characteristics. For a description of relevant values, see DEVICE_OBJECT.

NTinternals.net (undocumented.ntinternals.net)

This structure is documented in Windows Driver Kit.

FILE_FS_DEVICE_INFORMATION represents output buffer in a call to NtQueryVolumeInformationFile with FileFsDeviceInformation information class. Structure is available in <ntddk.h> header file from Win2000 DDK.

DeviceType

Numeric device types are defined in <ntddk.h> as FILE_DEVICE_* precompiler definitions.

Characteristics

Or-ed bit mask of device characteristic. Can be one of:

Documented by

Tomasz Nowak

FILE_FS_DEVICE_INFORMATION - NtDoc