// winioctl.h

typedef struct _FSCTL_GET_INTEGRITY_INFORMATION_BUFFER {
  WORD  ChecksumAlgorithm;
  WORD  Reserved;
  DWORD Flags;
  DWORD ChecksumChunkSizeInBytes;
  DWORD ClusterSizeInBytes;
} FSCTL_GET_INTEGRITY_INFORMATION_BUFFER, *PFSCTL_GET_INTEGRITY_INFORMATION_BUFFER;
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Win32 API reference (ns-winioctl-fsctl_get_integrity_information_buffer)

FSCTL_GET_INTEGRITY_INFORMATION_BUFFER structure

Description

Contains the integrity information for a file or directory. Returned from the FSCTL_GET_INTEGRITY_INFORMATION control code.

Members

`ChecksumAlgorithm`

The checksum algorithm used.

Value	Meaning
CHECKSUM_TYPE_NONE 0x0000	The file or directory is not configured to use integrity.
CHECKSUM_TYPE_CRC64 0x0002	The file or directory uses a CRC64 checksum to provide integrity.
3–0xffff	Reserved for future use.

`Reserved`

Reserved for future use. Set to 0.

`Flags`

Contains one or more flags.

Value	Meaning
FSCTL_INTEGRITY_FLAG_CHECKSUM_ENFORCEMENT_OFF 0x00000001	If set, the checksum enforcement is disabled.

`ChecksumChunkSizeInBytes`

Size in bytes of the chunks used to calculate checksums.

`ClusterSizeInBytes`

Size in bytes of a cluster for this volume. This value must be a power of 2, must be greater than or equal to the sector size of the underlying hardware and must be a power of 2 multiple of the sector size.

FSCTL_GET_INTEGRITY_INFORMATION_BUFFER - NtDoc