#ifndef _NTIOAPI_H

typedef struct _FILE_FS_ATTRIBUTE_INFORMATION
{
    ULONG FileSystemAttributes;
    LONG MaximumComponentNameLength;
    ULONG FileSystemNameLength;
    _Field_size_bytes_(FileSystemNameLength) WCHAR FileSystemName[1];
} FILE_FS_ATTRIBUTE_INFORMATION, *PFILE_FS_ATTRIBUTE_INFORMATION;

#endif
View code on GitHub

This structure is documented in Windows Driver Kit.

FILE_FS_ATTRIBUTE_INFORMATION is output buffer in a call to NtQueryVolumeInformationFile function with FileFsAttributeInformation information class.

FileSystemAttributes

??? (0x1F)

MaximumComponentNameLength

Maximum length of file name on specified device.

FileSystemNameLength

Length of FileSystemName array, in bytes.

FileSystemName[1]

Name of File System on specified device (ex. "NTFS").

Documented by

Bo Branten
Tomasz Nowak

FILE_FS_ATTRIBUTE_INFORMATION - NtDoc

FileSystemAttributes

MaximumComponentNameLength

FileSystemNameLength

FileSystemName[1]

Documented by

See also