ceph/src/messages/MMonGetVersion.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_MMONGETVERSION_H
  16 #define CEPH_MMONGETVERSION_H
  17
  18 #include "msg/Message.h"
  19
  20 #include "include/types.h"
  21
  22 /*
  23  * This message is sent to the monitors to verify that the client's
  24  * version of the map(s) is the latest available. For example, this
  25  * can be used to determine whether a pool actually does not exist, or
  26  * if it may have been created but the map was not received yet.
  27  */
  28 class MMonGetVersion : public MessageInstance<MMonGetVersion> {
  29 public:
  30   friend factory;
  31
  32   MMonGetVersion() : MessageInstance(CEPH_MSG_MON_GET_VERSION) {}
  33
  34   std::string_view get_type_name() const override {
  35     return "mon_get_version";
  36   }
  37
  38   void print(ostream& o) const override {
  39     o << "mon_get_version(what=" << what << " handle=" << handle << ")";
  40   }
  41
  42   void encode_payload(uint64_t features) override {
  43     using ceph::encode;
  44     encode(handle, payload);
  45     encode(what, payload);
  46   }
  47
  48   void decode_payload() override {
  49     auto p = payload.cbegin();
  50     decode(handle, p);
  51     decode(what, p);
  52   }
  53
  54   ceph_tid_t handle = 0;
  55   string what;
  56
  57 private:
  58   ~MMonGetVersion() override {}
  59 };
  60
  61 #endif