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diff --git a/src/ceph/src/messages/MOSDPGNotify.h b/src/ceph/src/messages/MOSDPGNotify.h
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+++ b/src/ceph/src/messages/MOSDPGNotify.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_MOSDPGPEERNOTIFY_H
+#define CEPH_MOSDPGPEERNOTIFY_H
+
+#include "msg/Message.h"
+
+#include "osd/osd_types.h"
+
+/*
+ * PGNotify - notify primary of my PGs and versions.
+ */
+
+class MOSDPGNotify : public Message {
+
+  static const int HEAD_VERSION = 6;
+  static const int COMPAT_VERSION = 2;
+
+  epoch_t epoch = 0;
+  /// query_epoch is the epoch of the query being responded to, or
+  /// the current epoch if this is not being sent in response to a
+  /// query. This allows the recipient to disregard responses to old
+  /// queries.
+  vector<pair<pg_notify_t,PastIntervals> > pg_list;   // pgid -> version
+
+ public:
+  version_t get_epoch() const { return epoch; }
+  const vector<pair<pg_notify_t,PastIntervals> >& get_pg_list() const {
+    return pg_list;
+  }
+
+  MOSDPGNotify()
+    : Message(MSG_OSD_PG_NOTIFY, HEAD_VERSION, COMPAT_VERSION) { 
+    set_priority(CEPH_MSG_PRIO_HIGH);
+  }
+  MOSDPGNotify(epoch_t e, vector<pair<pg_notify_t,PastIntervals> >& l)
+    : Message(MSG_OSD_PG_NOTIFY, HEAD_VERSION, COMPAT_VERSION),
+      epoch(e) {
+    pg_list.swap(l);
+    set_priority(CEPH_MSG_PRIO_HIGH);
+  }
+private:
+  ~MOSDPGNotify() override {}
+
+public:  
+  const char *get_type_name() const override { return "PGnot"; }
+
+  void encode_payload(uint64_t features) override {
+    if (HAVE_FEATURE(features, SERVER_LUMINOUS)) {
+      header.version = HEAD_VERSION;
+    } else {
+      // for jewel+kraken compat only
+      header.version = 5;
+
+      // Use query_epoch for first entry for backwards compatibility
+      epoch_t query_epoch = epoch;
+      if (pg_list.size())
+	query_epoch = pg_list.begin()->first.query_epoch;
+    
+      ::encode(epoch, payload);
+
+      // v2 was vector<pg_info_t>
+      __u32 n = pg_list.size();
+      ::encode(n, payload);
+      for (auto p = pg_list.begin();
+	   p != pg_list.end();
+	   p++)
+	::encode(p->first.info, payload);
+
+      ::encode(query_epoch, payload);
+
+      // v3 needs the PastIntervals for each record
+      for (auto p = pg_list.begin();
+	   p != pg_list.end();
+	   p++) {
+	p->second.encode_classic(payload);
+      }
+
+      // v4 needs epoch_sent, query_epoch
+      for (vector<pair<pg_notify_t,PastIntervals> >::iterator p = pg_list.begin();
+	   p != pg_list.end();
+	   p++)
+	::encode(pair<epoch_t, epoch_t>(
+		   p->first.epoch_sent, p->first.query_epoch),
+		 payload);
+
+      // v5 needs from, to
+      for (vector<pair<pg_notify_t, PastIntervals> >::iterator p = pg_list.begin();
+	   p != pg_list.end();
+	   ++p) {
+	::encode(p->first.from, payload);
+	::encode(p->first.to, payload);
+      }
+      return;
+    }
+
+    ::encode(epoch, payload);
+    ::encode(pg_list, payload);
+  }
+
+  void decode_payload() override {
+    bufferlist::iterator p = payload.begin();
+    if (header.version < 6) {
+      // for kraken+jewel compat only
+      epoch_t query_epoch;
+      ::decode(epoch, p);
+
+      // decode pg_info_t portion of the vector
+      __u32 n;
+      ::decode(n, p);
+      pg_list.resize(n);
+      for (unsigned i=0; i<n; i++) {
+	::decode(pg_list[i].first.info, p);
+      }
+
+      ::decode(query_epoch, p);
+
+      if (header.version >= 3) {
+	// get the PastIntervals portion
+	for (unsigned i=0; i<n; i++) {
+	  pg_list[i].second.decode_classic(p);
+	}
+      }
+
+      // v3 needs epoch_sent, query_epoch
+      for (auto i = pg_list.begin();
+	   i != pg_list.end();
+	   i++) {
+	if (header.version >= 4) {
+	  pair<epoch_t, epoch_t> dec;
+	  ::decode(dec, p);
+	  i->first.epoch_sent = dec.first;
+	  i->first.query_epoch = dec.second;
+	} else {
+	  i->first.epoch_sent = epoch;
+	  i->first.query_epoch = query_epoch;
+	}
+      }
+
+      // v5 needs from and to
+      if (header.version >= 5) {
+	for (auto i = pg_list.begin();
+	     i != pg_list.end();
+	     i++) {
+	  ::decode(i->first.from, p);
+	  ::decode(i->first.to, p);
+	}
+      }
+      return;
+    }
+
+    ::decode(epoch, p);
+    ::decode(pg_list, p);
+  }
+  void print(ostream& out) const override {
+    out << "pg_notify(";
+    for (auto i = pg_list.begin();
+         i != pg_list.end();
+         ++i) {
+      if (i != pg_list.begin())
+	out << " ";
+      out << i->first << "=" << i->second;
+    }
+    out << " epoch " << epoch
+	<< ")";
+  }
+};
+
+#endif