--- /dev/null
+// -*- 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_MMDSMAP_H
+#define CEPH_MMDSMAP_H
+
+#include "msg/Message.h"
+#include "mds/MDSMap.h"
+#include "include/ceph_features.h"
+
+class MMDSMap : public Message {
+ static const int HEAD_VERSION = 1;
+ static const int COMPAT_VERSION = 1;
+public:
+
+ uuid_d fsid;
+ epoch_t epoch;
+ bufferlist encoded;
+
+ version_t get_epoch() const { return epoch; }
+ bufferlist& get_encoded() { return encoded; }
+
+ MMDSMap() :
+ Message(CEPH_MSG_MDS_MAP, HEAD_VERSION, COMPAT_VERSION) {}
+ MMDSMap(const uuid_d &f, MDSMap *mm) :
+ Message(CEPH_MSG_MDS_MAP, HEAD_VERSION, COMPAT_VERSION),
+ fsid(f) {
+ epoch = mm->get_epoch();
+ mm->encode(encoded, -1); // we will reencode with fewer features as necessary
+ }
+private:
+ ~MMDSMap() override {}
+
+public:
+ const char *get_type_name() const override { return "mdsmap"; }
+ void print(ostream& out) const override {
+ out << "mdsmap(e " << epoch << ")";
+ }
+
+ // marshalling
+ void decode_payload() override {
+ bufferlist::iterator p = payload.begin();
+ ::decode(fsid, p);
+ ::decode(epoch, p);
+ ::decode(encoded, p);
+ }
+ void encode_payload(uint64_t features) override {
+ ::encode(fsid, payload);
+ ::encode(epoch, payload);
+ if ((features & CEPH_FEATURE_PGID64) == 0 ||
+ (features & CEPH_FEATURE_MDSENC) == 0 ||
+ (features & CEPH_FEATURE_MSG_ADDR2) == 0) {
+ // reencode for old clients.
+ MDSMap m;
+ m.decode(encoded);
+ encoded.clear();
+ m.encode(encoded, features);
+ }
+ ::encode(encoded, payload);
+ }
+};
+
+#endif