3.2.4.20.1 Application Requests Enumeration of Previous Versions

The application provides:

  • A handle to the Open identifying a file on a volume for which the application requires the previous version time stamps.

  • The maximum output buffer size that it will accept.

If the handle is invalid, or if no Open referenced by the handle is found, the client MUST return an implementation-specific error code. If the handle is valid and Open is found, the client MUST proceed as follows.

For the specified Open, the client MUST select a connection as specified in section 3.2.4.1.7. If no connection is available, the client MUST fail the FSCTL operation.

Otherwise, the client initializes an SMB2 IOCTL Request following the syntax specified in section 2.2.31. The SMB2 header MUST be initialized as follows:

  • The Command field is set to SMB2 IOCTL.

  • The MessageId field is set as specified in section 3.2.4.1.3.

  • The SessionId field is set to Open.TreeConnect.Session.SessionId.

  • The TreeId field is set to Open.TreeConnect.TreeConnectId.

The SMB2 IOCTL Request MUST be initialized as specified in section 2.2.31, with the exception of the following values:

  • The CtlCode field is set to FSCTL_SRV_ENUMERATE_SNAPSHOTS.

  • The FileId field is set to Open.FileId.

  • The InputCount field is set to 0.

  • The MaxInputResponse field is set to 0.

  • The MaxOutputResponse field is set to the maximum output buffer size that the application will accept.

  • SMB2_0_IOCTL_IS_FSCTL is set to TRUE in the Flags field.

The request MUST be sent to the server.