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diff --git a/src/ceph/src/common/io_priority.cc b/src/ceph/src/common/io_priority.cc
new file mode 100644
index 0000000..c635555
--- /dev/null
+++ b/src/ceph/src/common/io_priority.cc
@@ -0,0 +1,56 @@
+// -*- 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.
+ *
+ */
+
+#include <unistd.h>
+#if defined(__FreeBSD__)
+#include <errno.h>
+#endif
+#ifdef __linux__
+#include <sys/syscall.h>   /* For SYS_xxx definitions */
+#endif
+#include <algorithm>
+
+#include "io_priority.h"
+
+pid_t ceph_gettid(void)
+{
+#ifdef __linux__
+  return syscall(SYS_gettid);
+#else
+  return -ENOSYS;
+#endif
+}
+
+int ceph_ioprio_set(int whence, int who, int ioprio)
+{
+#ifdef __linux__
+  return syscall(SYS_ioprio_set, whence, who, ioprio);
+#else
+  return -ENOSYS;
+#endif
+}
+
+int ceph_ioprio_string_to_class(const std::string& s)
+{
+  std::string l = s;
+  std::transform(l.begin(), l.end(), l.begin(), ::tolower);
+
+  if (l == "idle")
+    return IOPRIO_CLASS_IDLE;
+  if (l == "be" || l == "besteffort" || l == "best effort")
+    return IOPRIO_CLASS_BE;
+  if (l == "rt" || l == "realtime" || l == "real time")
+    return IOPRIO_CLASS_RT;
+  return -EINVAL;
+}