#ifndef _NTIOAPI_H

//
// NtQueryQuotaInformationFile/NtSetQuotaInformationFile types
//

typedef struct _FILE_GET_QUOTA_INFORMATION
{
    ULONG NextEntryOffset;
    ULONG SidLength;
    _Field_size_bytes_(SidLength) SID Sid;
} FILE_GET_QUOTA_INFORMATION, *PFILE_GET_QUOTA_INFORMATION;

#endif
View code on GitHub

// ntifs.h

typedef struct _FILE_GET_QUOTA_INFORMATION {
  ULONG NextEntryOffset;
  ULONG SidLength;
  SID   Sid;
} FILE_GET_QUOTA_INFORMATION, *PFILE_GET_QUOTA_INFORMATION;
View the official Windows Driver Kit DDI reference

NtDoc

This structure is documented in Windows Driver Kit.

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Windows Driver Kit DDI reference (ns-ntifs-_file_get_quota_information)

_FILE_GET_QUOTA_INFORMATION structure

Description

The FILE_GET_QUOTA_INFORMATION structure is used to query for quota information.

Members

`NextEntryOffset`

Offset, in bytes, of the next FILE_GET_QUOTA_INFORMATION-typed entry. This member is zero if no other entries follow this one.

`SidLength`

Length, in bytes, of the Sid member.

`Sid`

Security identifier (SID) whose quota information is to be returned.

Remarks

The FILE_GET_QUOTA_INFORMATION structure is used to query for quota information. The quota information is returned in a FILE_QUOTA_INFORMATION-structured buffer.

This structure must be aligned on a LONG (4-byte) boundary.

FILE_GET_QUOTA_INFORMATION - NtDoc