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 : public MessageInstance<MOSDPGNotify> {
  27 public:
  28   friend factory;
  29 private:
  30   static constexpr int HEAD_VERSION = 6;
  31   static constexpr int COMPAT_VERSION = 6;
  32
  33   epoch_t epoch = 0;
  34   /// query_epoch is the epoch of the query being responded to, or
  35   /// the current epoch if this is not being sent in response to a
  36   /// query. This allows the recipient to disregard responses to old
  37   /// queries.
  38   vector<pair<pg_notify_t,PastIntervals> > pg_list;   // pgid -> version
  39
  40  public:
  41   version_t get_epoch() const { return epoch; }
  42   const vector<pair<pg_notify_t,PastIntervals> >& get_pg_list() const {
  43     return pg_list;
  44   }
  45
  46   MOSDPGNotify()
  47     : MessageInstance(MSG_OSD_PG_NOTIFY, HEAD_VERSION, COMPAT_VERSION) {
  48     set_priority(CEPH_MSG_PRIO_HIGH);
  49   }
  50   MOSDPGNotify(epoch_t e, vector<pair<pg_notify_t,PastIntervals> >& l)
  51     : MessageInstance(MSG_OSD_PG_NOTIFY, HEAD_VERSION, COMPAT_VERSION),
  52       epoch(e) {
  53     pg_list.swap(l);
  54     set_priority(CEPH_MSG_PRIO_HIGH);
  55   }
  56 private:
  57   ~MOSDPGNotify() override {}
  58
  59 public:
  60   std::string_view get_type_name() const override { return "PGnot"; }
  61
  62   void encode_payload(uint64_t features) override {
  63     using ceph::encode;
  64     encode(epoch, payload);
  65     encode(pg_list, payload);
  66   }
  67
  68   void decode_payload() override {
  69     auto p = payload.cbegin();
  70     decode(epoch, p);
  71     decode(pg_list, p);
  72   }
  73   void print(ostream& out) const override {
  74     out << "pg_notify(";
  75     for (auto i = pg_list.begin();
  76          i != pg_list.end();
  77          ++i) {
  78       if (i != pg_list.begin())
  79         out << " ";
  80       out << i->first << "=" << i->second;
  81     }
  82     out << " epoch " << epoch
  83         << ")";
  84   }
  85 };
  86
  87 #endif