ceph/src/messages/MMonGetVersionReply.h

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3 /*
   4  * Ceph - scalable distributed file system
   5  *
   6  * Copyright (C) 2011 New Dream Network
   7  *
   8  * This is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License version 2.1, as published by the Free Software
  11  * Foundation.  See file COPYING.
  12  *
  13  */
  14
  15 #ifndef CEPH_MMONGETVERSIONREPLY_H
  16 #define CEPH_MMONGETVERSIONREPLY_H
  17
  18 #include "msg/Message.h"
  19
  20 #include "include/types.h"
  21
  22 /*
  23  * This message is sent from the monitors to clients in response to a
  24  * MMonGetVersion. The latest version of the requested thing is sent
  25  * back.
  26  */
  27 class MMonGetVersionReply final : public Message {
  28 private:
  29   static constexpr int HEAD_VERSION = 2;
  30
  31 public:
  32   MMonGetVersionReply() : Message{CEPH_MSG_MON_GET_VERSION_REPLY, HEAD_VERSION} { }
  33
  34   std::string_view get_type_name() const override {
  35     return "mon_get_version_reply";
  36   }
  37
  38   void print(std::ostream& o) const override {
  39     o << "mon_get_version_reply(handle=" << handle << " version=" << version << ")";
  40   }
  41
  42   void encode_payload(uint64_t features) override {
  43     using ceph::encode;
  44     encode(handle, payload);
  45     encode(version, payload);
  46     encode(oldest_version, payload);
  47   }
  48
  49   void decode_payload() override {
  50     using ceph::decode;
  51     auto p = payload.cbegin();
  52     decode(handle, p);
  53     decode(version, p);
  54     if (header.version >= 2)
  55       decode(oldest_version, p);
  56   }
  57
  58   ceph_tid_t handle = 0;
  59   version_t version = 0;
  60   version_t oldest_version = 0;
  61
  62 private:
  63   ~MMonGetVersionReply() final {}
  64 };
  65
  66 #endif