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FSCTL_GET_REPAIR control code

Retrieves information about the NTFS file system's self-healing mechanism.

To perform this operation, call the DeviceIoControl function with the following parameters.


BOOL DeviceIoControl(
  (HANDLE) hDevice,              // handle to device
  FSCTL_GET_REPAIR,              // dwIoControlCode
  NULL,                          // lpInBuffer
  0,                             // nInBufferSize
  (ULONG) lpOutBuffer,            // output buffer
  (DWORD) nOutBufferSize,         // size of output buffer
  (LPDWORD) lpBytesReturned,     // number of bytes returned
  (LPOVERLAPPED) lpOverlapped ); // OVERLAPPED structure

Parameters

hDevice

A handle to the device. To obtain a device handle, call the CreateFile function.

dwIoControlCode

The control code for the operation. Use FSCTL_GET_REPAIR for this operation.

lpInBuffer

Not used with this operation.

Set to NULL.

nInBufferSize

Not used with this operation.

Set to zero (0).

lpOutBuffer

If the output buffer is of a ULONG size, the DWORD returns just the state of the self healing (set by FSCTL_SET_REPAIR); if the output buffer is two DWORDS, the first DWORD returns the state of self healing, and the second returns the number of items in the repair queue.

nOutBufferSize

Not used with this operation.

Set to zero (0).

lpBytesReturned

A pointer to a variable that receives the size of the data stored in the output buffer, in bytes.

If the output buffer is too small, the call fails, GetLastError returns ERROR_INSUFFICIENT_BUFFER, and lpBytesReturned is zero.

If lpOverlapped is NULL, lpBytesReturned cannot be NULL. Even when an operation returns no output data and lpOutBuffer is NULL, DeviceIoControl makes use of lpBytesReturned. After such an operation, the value of lpBytesReturned is meaningless.

If lpOverlapped is not NULL, lpBytesReturned can be NULL. If this parameter is not NULL and the operation returns data, lpBytesReturned is meaningless until the overlapped operation has completed. To retrieve the number of bytes returned, call GetOverlappedResult. If hDevice is associated with an I/O completion port, you can retrieve the number of bytes returned by calling GetQueuedCompletionStatus.

lpOverlapped

A pointer to an OVERLAPPED structure.

If hDevice was opened without specifying FILE_FLAG_OVERLAPPED, lpOverlapped is ignored.

If hDevice was opened with the FILE_FLAG_OVERLAPPED flag, the operation is performed as an overlapped (asynchronous) operation. In this case, lpOverlapped must point to a valid OVERLAPPED structure that contains a handle to an event object. Otherwise, the function fails in unpredictable ways.

For overlapped operations, DeviceIoControl returns immediately, and the event object is signaled when the operation has been completed. Otherwise, the function does not return until the operation has been completed or an error occurs.

Return value

If the operation completes successfully, DeviceIoControl returns a nonzero value.

If the operation fails or is pending, DeviceIoControl returns zero. To get extended error information, call GetLastError.

Remarks

In Windows 8 and Windows Server 2012, this code is supported by the following technologies.

TechnologySupported

Server Message Block (SMB) 3.0 protocol

No

SMB 3.0 Transparent Failover (TFO)

No

SMB 3.0 with Scale-out File Shares (SO)

No

Cluster Shared Volume File System (CsvFS)

Yes

Resilient File System (ReFS)

No

 

Requirements

Minimum supported client

Windows Vista [desktop apps only]

Minimum supported server

Windows Server 2008 [desktop apps only]

Header

WinIoCtl.h (include Windows.h)

See also

DeviceIoControl
File Management Control Codes
FSCTL_INITIATE_REPAIR
FSCTL_SET_REPAIR
FSCTL_WAIT_FOR_REPAIR

 

 

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