3.2.4.8 Application Requests Flushing File Data
The application provides:
A Client.Open, representing the file that the application requests to have flushed.
The client MUST construct an SMB_COM_FLUSH Request (section 2.2.4.6.1) message, with the following additional requirements:
The SMB_Parameters.Words.FID field MUST contain the FID that was supplied by the application.
The request MUST be sent to the server as described in section 3.2.4.1.