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diff --git a/src/ceph/src/rbd_replay/ImageNameMap.cc b/src/ceph/src/rbd_replay/ImageNameMap.cc
new file mode 100644
index 0000000..f542657
--- /dev/null
+++ b/src/ceph/src/rbd_replay/ImageNameMap.cc
@@ -0,0 +1,69 @@
+// -*- 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) 2014 Adam Crume <adamcrume@gmail.com>
+ *
+ * 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 "ImageNameMap.hpp"
+
+
+using namespace std;
+using namespace rbd_replay;
+
+
+bool ImageNameMap::parse_mapping(string mapping_string, Mapping *mapping) const {
+  string fields[2];
+  int field = 0;
+  for (size_t i = 0, n = mapping_string.length(); i < n; i++) {
+    char c = mapping_string[i];
+    switch (c) {
+    case '\\':
+      if (i != n - 1 && mapping_string[i + 1] == '=') {
+	i++;
+	fields[field].push_back('=');
+      } else {
+	fields[field].push_back('\\');
+      }
+      break;
+    case '=':
+      if (field == 1) {
+	return false;
+      }
+      field = 1;
+      break;
+    default:
+      fields[field].push_back(c);
+    }
+  }
+  if (field == 0) {
+    return false;
+  }
+  if (!mapping->first.parse(fields[0])) {
+    return false;
+  }
+  if (!mapping->second.parse(fields[1])) {
+    return false;
+  }
+  return true;
+}
+
+void ImageNameMap::add_mapping(const Mapping& mapping) {
+  m_map.insert(mapping);
+}
+
+rbd_loc ImageNameMap::map(const rbd_loc& name) const {
+  std::map<rbd_loc, rbd_loc>::const_iterator p(m_map.find(name));
+  if (p == m_map.end()) {
+    return name;
+  } else {
+    return p->second;
+  }
+}