FSCTL_TXFS_TRANSACTION_ACTIVE IOCTL

Description

[!NOTE] Microsoft strongly recommends developers utilize alternative means to achieve your application’s needs. Many scenarios that TxF was developed for can be achieved through simpler and more readily available techniques. Furthermore, TxF may not be available in future versions of Microsoft Windows. For more information, and alternatives to TxF, please see Alternatives to using Transactional NTFS.

Returns a Boolean value that indicates if there were any transactions active on the associated volume when the snapshot was taken. This call is only valid for read-only snapshot volumes.

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

Parameters

Input buffer

Input buffer length

Output buffer

Output buffer length

Input/output buffer

Input/output buffer length

Status block

Irp->IoStatus.Status is set to STATUS_SUCCESS if the request is successful.

Otherwise, Status to the appropriate error condition as a NTSTATUS code.

For more information, see NTSTATUS Values.

Remarks

FSCTL_TXFS_TRANSACTION_ACTIVE is a synchronous operation.

If the TransactionsActiveAtSnapshot member of the TXFS_TRANSACTION_ACTIVE_INFO structure is TRUE, you must remount the snapshot read/write, and run your recovery operations.

ReFS: This code is not supported.

See also

• CreateFile
• DeviceIoControl
• TXFS_TRANSACTION_ACTIVE_INFO