}
        readSize = Math.min( file.tree.session.transport.rcv_buf_size - 70,
                            file.tree.session.transport.server.maxBufferSize - 70 );
    }

    protected IOException seToIoe(SmbException se) {
        IOException ioe = se;
        Throwable root = se.getRootCause();
        if (root instanceof TransportException) {
            ioe = (TransportException)root;

                fd.markClosed();
                return 0;
            }
            return resp.getAvailable();
        }
        catch ( SmbException se ) {
            throw seToIoe(se);
        }
    }


    @Override
    public void close () {
        // ignore, the shared file descriptor is closed by the pipe handle
    }