1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
2 // vim: ts=8 sw=2 smarttab
4 * Ceph - scalable distributed file system
6 * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
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.
16 #ifndef CEPH_MMDSMAP_H
17 #define CEPH_MMDSMAP_H
19 #include "msg/Message.h"
20 #include "mds/MDSMap.h"
21 #include "include/ceph_features.h"
23 class MMDSMap : public Message {
24 static const int HEAD_VERSION = 1;
25 static const int COMPAT_VERSION = 1;
32 version_t get_epoch() const { return epoch; }
33 bufferlist& get_encoded() { return encoded; }
36 Message(CEPH_MSG_MDS_MAP, HEAD_VERSION, COMPAT_VERSION) {}
37 MMDSMap(const uuid_d &f, MDSMap *mm) :
38 Message(CEPH_MSG_MDS_MAP, HEAD_VERSION, COMPAT_VERSION),
40 epoch = mm->get_epoch();
41 mm->encode(encoded, -1); // we will reencode with fewer features as necessary
44 ~MMDSMap() override {}
47 const char *get_type_name() const override { return "mdsmap"; }
48 void print(ostream& out) const override {
49 out << "mdsmap(e " << epoch << ")";
53 void decode_payload() override {
54 bufferlist::iterator p = payload.begin();
59 void encode_payload(uint64_t features) override {
60 ::encode(fsid, payload);
61 ::encode(epoch, payload);
62 if ((features & CEPH_FEATURE_PGID64) == 0 ||
63 (features & CEPH_FEATURE_MDSENC) == 0 ||
64 (features & CEPH_FEATURE_MSG_ADDR2) == 0) {
65 // reencode for old clients.
69 m.encode(encoded, features);
71 ::encode(encoded, payload);