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+// -*- 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) 2010 Greg Farnum <gregf@hq.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 JOURNAL_RESETTER_H_
+#define JOURNAL_RESETTER_H_
+
+
+#include "MDSUtility.h"
+
+class Journaler;
+
+/**
+ * This class lets you reset an mds journal for troubleshooting or whatever.
+ *
+ * To use, create a Resetter, call init(), and then call reset() with the name
+ * of the file to dump to.
+ */
+class Resetter : public MDSUtility {
+private:
+ mds_role_t role;
+ inodeno_t ino;
+ bool is_mdlog;
+
+protected:
+ int _write_reset_event(Journaler *journaler);
+
+public:
+ Resetter() {}
+ ~Resetter() {}
+
+ int init(mds_role_t role_, const std::string &type, bool hard);
+ /**
+ * For use when no journal header/pointer was present: write one
+ * out from scratch.
+ */
+ int reset_hard();
+ int reset();
+};
+
+#endif /* JOURNAL_RESETTER_H_ */