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diff --git a/src/ceph/src/cls/cephfs/cls_cephfs.h b/src/ceph/src/cls/cephfs/cls_cephfs.h
new file mode 100644
index 0000000..ca631c6
--- /dev/null
+++ b/src/ceph/src/cls/cephfs/cls_cephfs.h
@@ -0,0 +1,147 @@
+// -*- 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) 2015 Red Hat
+ *
+ * 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.
+ *
+ */
+
+#include "include/encoding.h"
+
+/**
+ * Value class for the xattr we'll use to accumulate
+ * the highest object seen for a given inode
+ */
+class ObjCeiling {
+  public:
+    uint64_t id;
+    uint64_t size;
+
+    ObjCeiling()
+      : id(0), size(0)
+    {}
+
+    ObjCeiling(uint64_t id_, uint64_t size_)
+      : id(id_), size(size_)
+    {}
+
+    bool operator >(ObjCeiling const &rhs) const
+    {
+      return id > rhs.id;
+    }
+
+    void encode(bufferlist &bl) const
+    {
+      ENCODE_START(1, 1, bl);
+      ::encode(id, bl);
+      ::encode(size, bl);
+      ENCODE_FINISH(bl);
+    }
+
+    void decode(bufferlist::iterator &p)
+    {
+      DECODE_START(1, p);
+      ::decode(id, p);
+      ::decode(size, p);
+      DECODE_FINISH(p);
+    }
+};
+WRITE_CLASS_ENCODER(ObjCeiling)
+
+class AccumulateArgs
+{
+public:
+  uint64_t obj_index;
+  uint64_t obj_size;
+  int64_t mtime;
+  std::string obj_xattr_name;
+  std::string mtime_xattr_name;
+  std::string obj_size_xattr_name;
+
+  AccumulateArgs(
+      uint64_t obj_index_,
+      uint64_t obj_size_,
+      time_t mtime_,
+      std::string obj_xattr_name_,
+      std::string mtime_xattr_name_,
+      std::string obj_size_xattr_name_)
+   : obj_index(obj_index_),
+     obj_size(obj_size_),
+     mtime(mtime_),
+     obj_xattr_name(obj_xattr_name_),
+     mtime_xattr_name(mtime_xattr_name_),
+     obj_size_xattr_name(obj_size_xattr_name_)
+  {}
+
+  AccumulateArgs()
+    : obj_index(0), obj_size(0), mtime(0)
+  {}
+
+  void encode(bufferlist &bl) const
+  {
+    ENCODE_START(1, 1, bl);
+    ::encode(obj_xattr_name, bl);
+    ::encode(mtime_xattr_name, bl);
+    ::encode(obj_size_xattr_name, bl);
+    ::encode(obj_index, bl);
+    ::encode(obj_size, bl);
+    ::encode(mtime, bl);
+    ENCODE_FINISH(bl);
+  }
+
+  void decode(bufferlist::iterator &bl)
+  {
+    DECODE_START(1, bl);
+    ::decode(obj_xattr_name, bl);
+    ::decode(mtime_xattr_name, bl);
+    ::decode(obj_size_xattr_name, bl);
+    ::decode(obj_index, bl);
+    ::decode(obj_size, bl);
+    ::decode(mtime, bl);
+    DECODE_FINISH(bl);
+  }
+};
+
+class InodeTagFilterArgs
+{
+  public:
+    std::string scrub_tag;
+
+  void encode(bufferlist &bl) const
+  {
+    ENCODE_START(1, 1, bl);
+    ::encode(scrub_tag, bl);
+    ENCODE_FINISH(bl);
+  }
+
+  void decode(bufferlist::iterator &bl)
+  {
+    DECODE_START(1, bl);
+    ::decode(scrub_tag, bl);
+    DECODE_FINISH(bl);
+  }
+};
+
+class AccumulateResult
+{
+public:
+  // Index of the highest-indexed object seen
+  uint64_t ceiling_obj_index;
+  // Size of the highest-index object seen
+  uint64_t ceiling_obj_size;
+  // Largest object seen
+  uint64_t max_obj_size;
+  // Highest mtime seen
+  int64_t   max_mtime;
+
+  AccumulateResult()
+    : ceiling_obj_index(0), ceiling_obj_size(0), max_obj_size(0), max_mtime(0)
+  {}
+};
+