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   static const int HEAD_VERSION = 3;
  22   static const int COMPAT_VERSION = 2;
  23
  24   vector<PullOp> pulls;
  25
  26 public:
  27   pg_shard_t from;
  28   spg_t pgid;
  29   epoch_t map_epoch, min_epoch;
  30   uint64_t cost;
  31
  32   epoch_t get_map_epoch() const override {
  33     return map_epoch;
  34   }
  35   epoch_t get_min_epoch() const override {
  36     return min_epoch;
  37   }
  38   spg_t get_spg() const override {
  39     return pgid;
  40   }
  41
  42   void take_pulls(vector<PullOp> *outpulls) {
  43     outpulls->swap(pulls);
  44   }
  45   void set_pulls(vector<PullOp> *inpulls) {
  46     inpulls->swap(pulls);
  47   }
  48
  49   MOSDPGPull()
  50     : MOSDFastDispatchOp(MSG_OSD_PG_PULL, HEAD_VERSION, COMPAT_VERSION),
  51       cost(0)
  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     bufferlist::iterator p = payload.begin();
  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     ::encode(pgid.pgid, payload);
  84     ::encode(map_epoch, payload);
  85     ::encode(pulls, payload, features);
  86     ::encode(cost, payload);
  87     ::encode(pgid.shard, payload);
  88     ::encode(from, payload);
  89     ::encode(min_epoch, payload);
  90   }
  91
  92   const char *get_type_name() const override { return "MOSDPGPull"; }
  93
  94   void print(ostream& out) const override {
  95     out << "MOSDPGPull(" << pgid
  96         << " e" << map_epoch << "/" << min_epoch
  97         << " cost " << cost
  98         << ")";
  99   }
 100 };
 101
 102 #endif