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diff --git a/src/ceph/src/librbd/managed_lock/Utils.h b/src/ceph/src/librbd/managed_lock/Utils.h
new file mode 100644
index 0000000..679cbfe
--- /dev/null
+++ b/src/ceph/src/librbd/managed_lock/Utils.h
@@ -0,0 +1,23 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef CEPH_LIBRBD_MANAGED_LOCK_UTILS_H
+#define CEPH_LIBRBD_MANAGED_LOCK_UTILS_H
+
+#include "include/int_types.h"
+#include <string>
+
+namespace librbd {
+namespace managed_lock {
+namespace util {
+
+const std::string &get_watcher_lock_tag();
+
+bool decode_lock_cookie(const std::string &tag, uint64_t *handle);
+std::string encode_lock_cookie(uint64_t watch_handle);
+
+} // namespace util
+} // namespace managed_lock
+} // namespace librbd
+
+#endif // CEPH_LIBRBD_MANAGED_LOCK_UTILS_H