ceph/src/messages/MOSDPGInfo.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
  16 #ifndef CEPH_MOSDPGINFO_H
  17 #define CEPH_MOSDPGINFO_H
  18
  19 #include "msg/Message.h"
  20 #include "osd/osd_types.h"
  21
  22 class MOSDPGInfo : public Message {
  23 private:
  24   static constexpr int HEAD_VERSION = 6;
  25   static constexpr int COMPAT_VERSION = 5;
  26
  27   epoch_t epoch = 0;
  28
  29 public:
  30   using pg_list_t = std::vector<pg_notify_t>;
  31   pg_list_t pg_list;
  32
  33   epoch_t get_epoch() const { return epoch; }
  34
  35   MOSDPGInfo()
  36     : MOSDPGInfo{0, {}}
  37   {}
  38   MOSDPGInfo(epoch_t mv)
  39     : MOSDPGInfo(mv, {})
  40   {}
  41   MOSDPGInfo(epoch_t mv, pg_list_t&& l)
  42     : Message{MSG_OSD_PG_INFO, HEAD_VERSION, COMPAT_VERSION},
  43       epoch{mv},
  44       pg_list{std::move(l)}
  45   {
  46     set_priority(CEPH_MSG_PRIO_HIGH);
  47   }
  48 private:
  49   ~MOSDPGInfo() override {}
  50
  51 public:
  52   std::string_view get_type_name() const override { return "pg_info"; }
  53   void print(ostream& out) const override {
  54     out << "pg_info(";
  55     for (auto i = pg_list.begin();
  56          i != pg_list.end();
  57          ++i) {
  58       if (i != pg_list.begin())
  59         out << " ";
  60       out << *i;
  61     }
  62     out << " epoch " << epoch
  63         << ")";
  64   }
  65
  66   void encode_payload(uint64_t features) override {
  67     using ceph::encode;
  68     header.version = HEAD_VERSION;
  69     encode(epoch, payload);
  70     if (!HAVE_FEATURE(features, SERVER_OCTOPUS)) {
  71       // pretend to be vector<pair<pg_notify_t,PastIntervals>>
  72       header.version = 5;
  73       encode((uint32_t)pg_list.size(), payload);
  74       for (auto& i : pg_list) {
  75         encode(i, payload);   // this embeds a dup (ignored) PastIntervals
  76         encode(i.past_intervals, payload);
  77       }
  78       return;
  79     }
  80     encode(pg_list, payload);
  81   }
  82   void decode_payload() override {
  83     auto p = payload.cbegin();
  84     decode(epoch, p);
  85     if (header.version == 5) {
  86       // decode legacy vector<pair<pg_notify_t,PastIntervals>>
  87       uint32_t num;
  88       decode(num, p);
  89       pg_list.resize(num);
  90       for (unsigned i = 0; i < num; ++i) {
  91         decode(pg_list[i], p);
  92         decode(pg_list[i].past_intervals, p);
  93       }
  94       return;
  95     }
  96     decode(pg_list, p);
  97   }
  98 private:
  99   template<class T, typename... Args>
 100   friend boost::intrusive_ptr<T> ceph::make_message(Args&&... args);
 101 };
 102
 103 #endif