FILE_LINK_ENTRY_INFORMATION - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers
#ifndef _NTIOAPI_H

typedef struct _FILE_LINK_ENTRY_INFORMATION
{
    ULONG NextEntryOffset;
    LONGLONG ParentFileId; // LARGE_INTEGER
    ULONG FileNameLength;
    _Field_size_bytes_(FileNameLength) WCHAR FileName[1];
} FILE_LINK_ENTRY_INFORMATION, *PFILE_LINK_ENTRY_INFORMATION;

#endif

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This structure is documented in Windows Driver Kit.