ceph/src/tools/cephfs/Dumper.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) 2010 Greg Farnum <gregf@hq.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 #ifndef JOURNAL_DUMPER_H_
  15 #define JOURNAL_DUMPER_H_
  16
  17
  18 #include "MDSUtility.h"
  19
  20 class Journaler;
  21
  22 /**
  23  * This class lets you dump out an mds journal for troubleshooting or whatever.
  24  *
  25  * It was built to work with cmds so some of the design choices are random.
  26  * To use, create a Dumper, call init(), and then call dump() with the name
  27  * of the file to dump to.
  28  */
  29
  30 class Dumper : public MDSUtility {
  31 private:
  32   mds_role_t role;
  33   inodeno_t ino;
  34
  35 public:
  36   Dumper() : ino(-1)
  37   {}
  38
  39   int init(mds_role_t role_, const std::string &type);
  40   int recover_journal(Journaler *journaler);
  41   int dump(const char *dumpfile);
  42   int undump(const char *dumpfile, bool force);
  43 };
  44
  45 #endif /* JOURNAL_DUMPER_H_ */