ceph/src/messages/MOSDPGNotify.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) 2004-2006 Sage Weil <sage@newdream.net>
   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_MOSDPGPEERNOTIFY_H
  16 #define CEPH_MOSDPGPEERNOTIFY_H
  17
  18 #include "msg/Message.h"
  19
  20 #include "osd/osd_types.h"
  21
  22 /*
  23  * PGNotify - notify primary of my PGs and versions.
  24  */
  25
  26 class MOSDPGNotify final : public Message {
  27 private:
  28   static constexpr int HEAD_VERSION = 7;
  29   static constexpr int COMPAT_VERSION = 7;
  30
  31   epoch_t epoch = 0;
  32   /// query_epoch is the epoch of the query being responded to, or
  33   /// the current epoch if this is not being sent in response to a
  34   /// query. This allows the recipient to disregard responses to old
  35   /// queries.
  36   using pg_list_t = std::vector<pg_notify_t>;
  37   pg_list_t pg_list;
  38
  39  public:
  40   version_t get_epoch() const { return epoch; }
  41   const pg_list_t& get_pg_list() const {
  42     return pg_list;
  43   }
  44
  45   MOSDPGNotify()
  46     : MOSDPGNotify(0, {})
  47   {}
  48   MOSDPGNotify(epoch_t e, pg_list_t&& l)
  49     : Message{MSG_OSD_PG_NOTIFY, HEAD_VERSION, COMPAT_VERSION},
  50       epoch(e),
  51       pg_list(std::move(l)) {
  52     set_priority(CEPH_MSG_PRIO_HIGH);
  53   }
  54 private:
  55   ~MOSDPGNotify() final {}
  56
  57 public:
  58   std::string_view get_type_name() const override { return "PGnot"; }
  59
  60   void encode_payload(uint64_t features) override {
  61     using ceph::encode;
  62     header.version = HEAD_VERSION;
  63     encode(epoch, payload);
  64     assert(HAVE_FEATURE(features, SERVER_OCTOPUS));
  65     encode(pg_list, payload);
  66   }
  67
  68   void decode_payload() override {
  69     auto p = payload.cbegin();
  70     using ceph::decode;
  71     decode(epoch, p);
  72     decode(pg_list, p);
  73   }
  74   void print(std::ostream& out) const override {
  75     out << "pg_notify(";
  76     for (auto i = pg_list.begin();
  77          i != pg_list.end();
  78          ++i) {
  79       if (i != pg_list.begin())
  80         out << " ";
  81       out << *i;
  82     }
  83     out << " epoch " << epoch
  84         << ")";
  85   }
  86 private:
  87   template<class T, typename... Args>
  88   friend boost::intrusive_ptr<T> ceph::make_message(Args&&... args);
  89 };
  90
  91 #endif