ceph/src/messages/MOSDPGPull.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) 2013 Inktank Storage, Inc.
   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 MOSDPGPULL_H
  16 #define MOSDPGPULL_H
  17
  18 #include "MOSDFastDispatchOp.h"
  19
  20 class MOSDPGPull : public MOSDFastDispatchOp {
  21 private:
  22   static constexpr int HEAD_VERSION = 3;
  23   static constexpr int COMPAT_VERSION = 2;
  24
  25   vector<PullOp> pulls;
  26
  27 public:
  28   pg_shard_t from;
  29   spg_t pgid;
  30   epoch_t map_epoch = 0, min_epoch = 0;
  31   uint64_t cost = 0;
  32
  33   epoch_t get_map_epoch() const override {
  34     return map_epoch;
  35   }
  36   epoch_t get_min_epoch() const override {
  37     return min_epoch;
  38   }
  39   spg_t get_spg() const override {
  40     return pgid;
  41   }
  42
  43   void take_pulls(vector<PullOp> *outpulls) {
  44     outpulls->swap(pulls);
  45   }
  46   void set_pulls(vector<PullOp> *inpulls) {
  47     inpulls->swap(pulls);
  48   }
  49
  50   MOSDPGPull()
  51     : MOSDFastDispatchOp{MSG_OSD_PG_PULL, HEAD_VERSION, COMPAT_VERSION}
  52   {}
  53
  54   void compute_cost(CephContext *cct) {
  55     cost = 0;
  56     for (vector<PullOp>::iterator i = pulls.begin();
  57          i != pulls.end();
  58          ++i) {
  59       cost += i->cost(cct);
  60     }
  61   }
  62
  63   int get_cost() const override {
  64     return cost;
  65   }
  66
  67   void decode_payload() override {
  68     auto p = payload.cbegin();
  69     decode(pgid.pgid, p);
  70     decode(map_epoch, p);
  71     decode(pulls, p);
  72     decode(cost, p);
  73     decode(pgid.shard, p);
  74     decode(from, p);
  75     if (header.version >= 3) {
  76       decode(min_epoch, p);
  77     } else {
  78       min_epoch = map_epoch;
  79     }
  80   }
  81
  82   void encode_payload(uint64_t features) override {
  83     using ceph::encode;
  84     encode(pgid.pgid, payload);
  85     encode(map_epoch, payload);
  86     encode(pulls, payload, features);
  87     encode(cost, payload);
  88     encode(pgid.shard, payload);
  89     encode(from, payload);
  90     encode(min_epoch, payload);
  91   }
  92
  93   std::string_view get_type_name() const override { return "MOSDPGPull"; }
  94
  95   void print(ostream& out) const override {
  96     out << "MOSDPGPull(" << pgid
  97         << " e" << map_epoch << "/" << min_epoch
  98         << " cost " << cost
  99         << ")";
 100   }
 101
 102 private:
 103   template<class T, typename... Args>
 104   friend boost::intrusive_ptr<T> ceph::make_message(Args&&... args);
 105 };
 106
 107 #endif