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SHUFFLE_FILE_DATA structure (ntifs.h)

  • Article

SHUFFLE_FILE_DATA is the input structure for the FSCTL_SHUFFLE_FILE control code.

Syntax

typedef struct _SHUFFLE_FILE_DATA {
  LONGLONG StartingOffset;
  LONGLONG Length;
  ULONG    Flags;
} SHUFFLE_FILE_DATA, *PSHUFFLE_FILE_DATA;

Members

StartingOffset

Cluster-aligned byte offset of the base of the contiguous region from which to add or remove data in the file passed with the FS control code.

Length

Cluster-aligned length in bytes of the data to be added or removed. Length can be one of the following values.

Value Meaning
Greater than 0 Add the allocation to the file.
Less than 0 Remove the allocation from the file.
0 Do nothing.

Flags

Bitwise OR of flags for the shuffle operation. Flags be the following value.

Value Meaning
SHUFFLE_FILE_FLAG_SKIP_INITIALIZING_NEW_CLUSTERS (0x001) Valid only when adding allocation. When set, free clusters are allocated and added but have arbitrary initial contents (they are not zero-initialized).

Requirements

Requirement Value
Minimum supported client Windows 10, version 1809
Header ntifs.h

See also

FSCTL_SHUFFLE_FILE