--- /dev/null
+// -*- 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;
+}