// -*- 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_ANCHOR_H
#define CEPH_ANCHOR_H

#include <string>
using std::string;

#include "include/types.h"
#include "mdstypes.h"
#include "include/buffer.h"


// identifies a anchor table mutation



// anchor type

class Anchor {
public:
  inodeno_t ino;      // anchored ino
  inodeno_t dirino;
  __u32     dn_hash;
  int       nref;     // reference count
  version_t updated;

  Anchor() : dn_hash(0), nref(0), updated(0) {}
  Anchor(inodeno_t i, inodeno_t di, __u32 hash, int nr, version_t u) :
    ino(i), dirino(di), dn_hash(hash), nref(nr), updated(u) { }
  
  void encode(bufferlist &bl) const {
    __u8 struct_v = 1;
    ::encode(struct_v, bl);
    ::encode(ino, bl);
    ::encode(dirino, bl);
    ::encode(dn_hash, bl);
    ::encode(nref, bl);
    ::encode(updated, bl);
  }
  void decode(bufferlist::iterator &bl) {
    __u8 struct_v;
    ::decode(struct_v, bl);
    ::decode(ino, bl);
    ::decode(dirino, bl);
    ::decode(dn_hash, bl);
    ::decode(nref, bl);
    ::decode(updated, bl);
  }
};
WRITE_CLASS_ENCODER(Anchor)

inline ostream& operator<<(ostream& out, const Anchor &a)
{
  return out << "a(" << a.ino << " " << a.dirino << "/" << a.dn_hash << " " << a.nref << " v" << a.updated << ")";
}

#endif
