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diff --git a/src/ceph/src/messages/MMonPaxos.h b/src/ceph/src/messages/MMonPaxos.h
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+++ b/src/ceph/src/messages/MMonPaxos.h
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+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- 
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software 
+ * Foundation.  See file COPYING.
+ * 
+ */
+
+
+#ifndef CEPH_MMONPAXOS_H
+#define CEPH_MMONPAXOS_H
+
+#include "messages/PaxosServiceMessage.h"
+#include "mon/mon_types.h"
+#include "include/ceph_features.h"
+
+class MMonPaxos : public Message {
+
+  static const int HEAD_VERSION = 4;
+  static const int COMPAT_VERSION = 3;
+
+ public:
+  // op types
+  const static int OP_COLLECT =   1; // proposer: propose round
+  const static int OP_LAST =      2; // voter:    accept proposed round
+  const static int OP_BEGIN =     3; // proposer: value proposed for this round
+  const static int OP_ACCEPT =    4; // voter:    accept propsed value
+  const static int OP_COMMIT =    5; // proposer: notify learners of agreed value
+  const static int OP_LEASE =     6; // leader: extend peon lease
+  const static int OP_LEASE_ACK = 7; // peon: lease ack
+  const static char *get_opname(int op) {
+    switch (op) {
+    case OP_COLLECT: return "collect";
+    case OP_LAST: return "last";
+    case OP_BEGIN: return "begin";
+    case OP_ACCEPT: return "accept";
+    case OP_COMMIT: return "commit";
+    case OP_LEASE: return "lease";
+    case OP_LEASE_ACK: return "lease_ack";
+    default: ceph_abort(); return 0;
+    }
+  }
+
+  epoch_t epoch = 0;   // monitor epoch
+  __s32 op = 0;          // paxos op
+
+  version_t first_committed = 0;  // i've committed to
+  version_t last_committed = 0;  // i've committed to
+  version_t pn_from = 0;         // i promise to accept after
+  version_t pn = 0;              // with with proposal
+  version_t uncommitted_pn = 0;     // previous pn, if we are a LAST with an uncommitted value
+  utime_t lease_timestamp;
+  utime_t sent_timestamp;
+
+  version_t latest_version = 0;
+  bufferlist latest_value;
+
+  map<version_t,bufferlist> values;
+
+  bufferlist feature_map;
+
+  MMonPaxos() : Message(MSG_MON_PAXOS, HEAD_VERSION, COMPAT_VERSION) { }
+  MMonPaxos(epoch_t e, int o, utime_t now) : 
+    Message(MSG_MON_PAXOS, HEAD_VERSION, COMPAT_VERSION),
+    epoch(e),
+    op(o),
+    first_committed(0), last_committed(0), pn_from(0), pn(0), uncommitted_pn(0),
+    sent_timestamp(now),
+    latest_version(0) {
+  }
+
+private:
+  ~MMonPaxos() override {}
+
+public:  
+  const char *get_type_name() const override { return "paxos"; }
+  
+  void print(ostream& out) const override {
+    out << "paxos(" << get_opname(op) 
+	<< " lc " << last_committed
+	<< " fc " << first_committed
+	<< " pn " << pn << " opn " << uncommitted_pn;
+    if (latest_version)
+      out << " latest " << latest_version << " (" << latest_value.length() << " bytes)";
+    out <<  ")";
+  }
+
+  void encode_payload(uint64_t features) override {
+    header.version = HEAD_VERSION;
+    ::encode(epoch, payload);
+    ::encode(op, payload);
+    ::encode(first_committed, payload);
+    ::encode(last_committed, payload);
+    ::encode(pn_from, payload);
+    ::encode(pn, payload);
+    ::encode(uncommitted_pn, payload);
+    ::encode(lease_timestamp, payload);
+    ::encode(sent_timestamp, payload);
+    ::encode(latest_version, payload);
+    ::encode(latest_value, payload);
+    ::encode(values, payload);
+    ::encode(feature_map, payload);
+  }
+  void decode_payload() override {
+    bufferlist::iterator p = payload.begin();
+    ::decode(epoch, p);
+    ::decode(op, p);
+    ::decode(first_committed, p);
+    ::decode(last_committed, p);
+    ::decode(pn_from, p);   
+    ::decode(pn, p);   
+    ::decode(uncommitted_pn, p);
+    ::decode(lease_timestamp, p);
+    ::decode(sent_timestamp, p);
+    ::decode(latest_version, p);
+    ::decode(latest_value, p);
+    ::decode(values, p);
+    if (header.version >= 4) {
+      ::decode(feature_map, p);
+    }
+  }
+};
+
+#endif