--- /dev/null
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef __CEPH_OSDC_SNAP_SET_DIFF_H
+#define __CEPH_OSDC_SNAP_SET_DIFF_H
+
+class CephContext;
+#include "include/rados/rados_types.hpp"
+#include "include/interval_set.h"
+
+void calc_snap_set_diff(CephContext *cct,
+ const librados::snap_set_t& snap_set,
+ librados::snap_t start, librados::snap_t end,
+ interval_set<uint64_t> *diff, uint64_t *end_size,
+ bool *end_exists, librados::snap_t *clone_end_snap_id);
+
+#endif