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diff --git a/src/ceph/src/librbd/io/Types.h b/src/ceph/src/librbd/io/Types.h
new file mode 100644
index 0000000..2b69d7b
--- /dev/null
+++ b/src/ceph/src/librbd/io/Types.h
@@ -0,0 +1,40 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef CEPH_LIBRBD_IO_TYPES_H
+#define CEPH_LIBRBD_IO_TYPES_H
+
+#include "include/int_types.h"
+#include <map>
+#include <vector>
+
+namespace librbd {
+namespace io {
+
+typedef enum {
+  AIO_TYPE_NONE = 0,
+  AIO_TYPE_GENERIC,
+  AIO_TYPE_OPEN,
+  AIO_TYPE_CLOSE,
+  AIO_TYPE_READ,
+  AIO_TYPE_WRITE,
+  AIO_TYPE_DISCARD,
+  AIO_TYPE_FLUSH,
+  AIO_TYPE_WRITESAME,
+  AIO_TYPE_COMPARE_AND_WRITE,
+} aio_type_t;
+
+enum Direction {
+  DIRECTION_READ,
+  DIRECTION_WRITE,
+  DIRECTION_BOTH
+};
+
+typedef std::vector<std::pair<uint64_t, uint64_t> > Extents;
+typedef std::map<uint64_t, uint64_t> ExtentMap;
+
+} // namespace io
+} // namespace librbd
+
+#endif // CEPH_LIBRBD_IO_TYPES_H
+