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diff --git a/src/ceph/src/common/io_priority.h b/src/ceph/src/common/io_priority.h
new file mode 100644
index 0000000..91ebf42
--- /dev/null
+++ b/src/ceph/src/common/io_priority.h
@@ -0,0 +1,44 @@
+// -*- 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) 2012 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.
+ *
+ */
+
+#ifndef CEPH_COMMON_IO_PRIORITY_H
+#define CEPH_COMMON_IO_PRIORITY_H
+
+#include <string>
+
+extern pid_t ceph_gettid();
+
+#ifndef IOPRIO_WHO_PROCESS
+# define IOPRIO_WHO_PROCESS 1
+#endif
+#ifndef IOPRIO_PRIO_VALUE
+# define IOPRIO_CLASS_SHIFT 13
+# define IOPRIO_PRIO_VALUE(class, data) \
+		(((class) << IOPRIO_CLASS_SHIFT) | (data))
+#endif
+#ifndef IOPRIO_CLASS_RT
+# define IOPRIO_CLASS_RT 1
+#endif
+#ifndef IOPRIO_CLASS_BE
+# define IOPRIO_CLASS_BE 2
+#endif
+#ifndef IOPRIO_CLASS_IDLE
+# define IOPRIO_CLASS_IDLE 3
+#endif
+
+extern int ceph_ioprio_set(int whence, int who, int ioprio);
+
+extern int ceph_ioprio_string_to_class(const std::string& s);
+
+#endif