ceph/src/messages/MMonProbe.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_MMONPROBE_H
  17 #define CEPH_MMONPROBE_H
  18
  19 #include "include/ceph_features.h"
  20 #include "msg/Message.h"
  21 #include "mon/MonMap.h"
  22
  23 class MMonProbe : public Message {
  24 public:
  25   static const int HEAD_VERSION = 6;
  26   static const int COMPAT_VERSION = 5;
  27
  28   enum {
  29     OP_PROBE = 1,
  30     OP_REPLY = 2,
  31     OP_SLURP = 3,
  32     OP_SLURP_LATEST = 4,
  33     OP_DATA = 5,
  34     OP_MISSING_FEATURES = 6,
  35   };
  36
  37   static const char *get_opname(int o) {
  38     switch (o) {
  39     case OP_PROBE: return "probe";
  40     case OP_REPLY: return "reply";
  41     case OP_SLURP: return "slurp";
  42     case OP_SLURP_LATEST: return "slurp_latest";
  43     case OP_DATA: return "data";
  44     case OP_MISSING_FEATURES: return "missing_features";
  45     default: ceph_abort(); return 0;
  46     }
  47   }
  48
  49   uuid_d fsid;
  50   int32_t op = 0;
  51   string name;
  52   set<int32_t> quorum;
  53   bufferlist monmap_bl;
  54   version_t paxos_first_version = 0;
  55   version_t paxos_last_version = 0;
  56   bool has_ever_joined = 0;
  57   uint64_t required_features = 0;
  58
  59   MMonProbe()
  60     : Message(MSG_MON_PROBE, HEAD_VERSION, COMPAT_VERSION) {}
  61   MMonProbe(const uuid_d& f, int o, const string& n, bool hej)
  62     : Message(MSG_MON_PROBE, HEAD_VERSION, COMPAT_VERSION),
  63       fsid(f),
  64       op(o),
  65       name(n),
  66       paxos_first_version(0),
  67       paxos_last_version(0),
  68       has_ever_joined(hej),
  69       required_features(0) {}
  70 private:
  71   ~MMonProbe() override {}
  72
  73 public:
  74   const char *get_type_name() const override { return "mon_probe"; }
  75   void print(ostream& out) const override {
  76     out << "mon_probe(" << get_opname(op) << " " << fsid << " name " << name;
  77     if (quorum.size())
  78       out << " quorum " << quorum;
  79     if (op == OP_REPLY) {
  80       out << " paxos("
  81         << " fc " << paxos_first_version
  82         << " lc " << paxos_last_version
  83         << " )";
  84     }
  85     if (!has_ever_joined)
  86       out << " new";
  87     if (required_features)
  88       out << " required_features " << required_features;
  89     out << ")";
  90   }
  91
  92   void encode_payload(uint64_t features) override {
  93     if (monmap_bl.length() &&
  94         ((features & CEPH_FEATURE_MONENC) == 0 ||
  95          (features & CEPH_FEATURE_MSG_ADDR2) == 0)) {
  96       // reencode old-format monmap
  97       MonMap t;
  98       t.decode(monmap_bl);
  99       monmap_bl.clear();
 100       t.encode(monmap_bl, features);
 101     }
 102
 103     ::encode(fsid, payload);
 104     ::encode(op, payload);
 105     ::encode(name, payload);
 106     ::encode(quorum, payload);
 107     ::encode(monmap_bl, payload);
 108     ::encode(has_ever_joined, payload);
 109     ::encode(paxos_first_version, payload);
 110     ::encode(paxos_last_version, payload);
 111     ::encode(required_features, payload);
 112   }
 113   void decode_payload() override {
 114     bufferlist::iterator p = payload.begin();
 115     ::decode(fsid, p);
 116     ::decode(op, p);
 117     ::decode(name, p);
 118     ::decode(quorum, p);
 119     ::decode(monmap_bl, p);
 120     ::decode(has_ever_joined, p);
 121     ::decode(paxos_first_version, p);
 122     ::decode(paxos_last_version, p);
 123     if (header.version >= 6)
 124       ::decode(required_features, p);
 125     else
 126       required_features = 0;
 127   }
 128 };
 129
 130 #endif