FSCTL_SET_INTEGRITY_INFORMATION_BUFFER structure (winioctl.h)

Input buffer passed with the FSCTL_SET_INTEGRITY_INFORMATION control code.

Syntax

typedef struct _FSCTL_SET_INTEGRITY_INFORMATION_BUFFER {
  WORD  ChecksumAlgorithm;
  WORD  Reserved;
  DWORD Flags;
} FSCTL_SET_INTEGRITY_INFORMATION_BUFFER, *PFSCTL_SET_INTEGRITY_INFORMATION_BUFFER;

Members

ChecksumAlgorithm

Specifies the checksum algorithm.

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.
3–0xfffe	Reserved for future use. Must not be used.
CHECKSUM_TYPE_UNCHANGED 0xffff	The checksum algorithm is to remain the same.

Reserved

Must be 0

Flags

Contains zero or more flags.

Value	Meaning
FSCTL_INTEGRITY_FLAG_CHECKSUM_ENFORCEMENT_OFF 0x00000001	If set, the checksum enforcement is disabled and reads will succeed even if the checksums do not match. This flag is valid only if the file has an integrity algorithm set. If there is no algorithm set or the CheckSum member is set to CHECKSUM_TYPE_NONE, then the operation fails with ERROR_INVALID_PARAMETER.

Remarks

If FSCTL_INTEGRITY_FLAG_CHECKSUM_ENFORCEMENT_OFF is specified and the file is opened with sharing permissions such that subsequent opens can succeed, it's possible for corrupt data to be read by an application that did not specify FSCTL_INTEGRITY_FLAG_CHECKSUM_ENFORCEMENT_OFF.

Requirements

Requirement	Value
Minimum supported client	Windows 8 [desktop apps only]
Minimum supported server	Windows Server 2012 [desktop apps only]
Header	winioctl.h (include Windows.h)

See also

FSCTL_GET_INTEGRITY_INFORMATION_BUFFER

FSCTL_SET_INTEGRITY_INFORMATION

Volume Management Structures