#ifndef _NTIOAPI_H

/**
 * The FILE_MEMORY_PARTITION_INFORMATION structure is used to query information about a memory partition.
 * \sa https://learn.microsoft.com/en-us/windows-hardware/drivers/ddi/wdm/ns-wdm-_file_memory_partition_information
 */
typedef struct _FILE_MEMORY_PARTITION_INFORMATION
{
    HANDLE OwnerPartitionHandle;
    union
    {
        struct
        {
            UCHAR NoCrossPartitionAccess;
            UCHAR Spare[3];
        };
        ULONG AllFlags;
    } Flags;
} FILE_MEMORY_PARTITION_INFORMATION, *PFILE_MEMORY_PARTITION_INFORMATION;

#endif
View code on GitHub

// wdm.h

typedef struct _FILE_MEMORY_PARTITION_INFORMATION {
  ULONG_PTR OwnerPartitionHandle;
  union {
    struct {
      UCHAR NoCrossPartitionAccess;
      UCHAR Spare[3];
    } DUMMYSTRUCTNAME;
    ULONG AllFlags;
  } Flags;
} FILE_MEMORY_PARTITION_INFORMATION, *PFILE_MEMORY_PARTITION_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-wdm-_file_memory_partition_information)

_FILE_MEMORY_PARTITION_INFORMATION structure

Description

Stores information about memory partition. This structure is used by the ZwSetInformationFile function.

Members

`OwnerPartitionHandle`

Handle to the specified partition.

`Flags`

`Flags.DUMMYSTRUCTNAME`

`Flags.DUMMYSTRUCTNAME.NoCrossPartitionAccess`

Determines whether cross-partition access is allowed.

`Flags.DUMMYSTRUCTNAME.Spare`

`Flags.AllFlags`

Bitwise of all flags.

View the official Windows Driver Kit DDI reference

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