ceph/src/osd/ObjectVersioner.h

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3 /*
   4  * Ceph - scalable distributed file system
   5  *
   6  * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
   7  *
   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.
  12  *
  13  */
  14
  15 #ifndef CEPH_OSD_OBJECTVERSIONER_H
  16 #define CEPH_OSD_OBJECTVERSIONER_H
  17
  18 class ObjectVersioner {
  19  public:
  20   pobject_t oid;
  21
  22   void get_versions(list<version_t>& ls);
  23   version_t head();      // newest
  24   version_t committed(); // last committed
  25   version_t tail();      // oldest
  26
  27   /*
  28    * prepare a new version, starting wit "raw" transaction t.
  29    */
  30   void prepare(ObjectStore::Transaction& t, version_t v);
  31   void rollback_to(version_t v);
  32   void commit_to(version_t v);
  33 };
  34
  35 #endif