#ifndef _NTIOAPI_H

/**
 * The FILE_EA_INFORMATION structure is used to query for the size of the extended attributes (EA) for a file.
 * \sa https://learn.microsoft.com/en-us/windows-hardware/drivers/ddi/ntifs/ns-ntifs-_file_ea_information
 */
typedef struct _FILE_EA_INFORMATION
{
    ULONG EaSize;
} FILE_EA_INFORMATION, *PFILE_EA_INFORMATION;

#endif
View code on GitHub

// ntifs.h

typedef struct _FILE_EA_INFORMATION {
  ULONG EaSize;
} FILE_EA_INFORMATION, *PFILE_EA_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_ea_information)

_FILE_EA_INFORMATION structure

Description

The FILE_EA_INFORMATION structure is used to query for the size of the extended attributes (EA) for a file.

Members

`EaSize`

Specifies the combined length, in bytes, of the extended attributes for the file.

Remarks

This structure is used by the ZwQueryInformationFile routine.

An extended attribute is a piece of application-specific metadata that an application can associate with a file that is not part of the file's data. In addition to the built-in attributes of a file, such as creation and modification times, applications can add non-file system attributes, such as the author's name and a description of the file content.

FILE_EA_INFORMATION - NtDoc