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diff --git a/src/ceph/src/mds/MDSContext.cc b/src/ceph/src/mds/MDSContext.cc
new file mode 100644
index 0000000..3d1d168
--- /dev/null
+++ b/src/ceph/src/mds/MDSContext.cc
@@ -0,0 +1,105 @@
+// -*- 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 "MDSRank.h"
+
+#include "MDSContext.h"
+
+#include "common/dout.h"
+#define dout_context g_ceph_context
+#define dout_subsys ceph_subsys_mds
+
+void MDSInternalContextBase::complete(int r) {
+  MDSRank *mds = get_mds();
+
+  dout(10) << "MDSInternalContextBase::complete: " << typeid(*this).name() << dendl;
+  assert(mds != NULL);
+  assert(mds->mds_lock.is_locked_by_me());
+  MDSContext::complete(r);
+}
+
+
+MDSRank *MDSInternalContext::get_mds() {
+  return mds;
+}
+
+MDSRank *MDSInternalContextWrapper::get_mds()
+{
+  return mds;
+}
+
+void MDSInternalContextWrapper::finish(int r)
+{
+  fin->complete(r);
+}
+
+void MDSIOContextBase::complete(int r) {
+  MDSRank *mds = get_mds();
+
+  dout(10) << "MDSIOContextBase::complete: " << typeid(*this).name() << dendl;
+  assert(mds != NULL);
+  Mutex::Locker l(mds->mds_lock);
+  if (mds->is_daemon_stopping()) {
+    dout(4) << "MDSIOContextBase::complete: dropping for stopping "
+            << typeid(*this).name() << dendl;
+    return;
+  }
+
+  if (r == -EBLACKLISTED) {
+    derr << "MDSIOContextBase: blacklisted!  Restarting..." << dendl;
+    mds->respawn();
+  } else {
+    MDSContext::complete(r);
+  }
+}
+
+void MDSLogContextBase::complete(int r) {
+  MDLog *mdlog = get_mds()->mdlog;
+  uint64_t safe_pos = write_pos;
+  pre_finish(r);
+  // MDSContextBase::complete() free this
+  MDSIOContextBase::complete(r);
+  mdlog->set_safe_pos(safe_pos);
+}
+
+MDSRank *MDSIOContext::get_mds() {
+  return mds;
+}
+
+MDSRank *MDSIOContextWrapper::get_mds() {
+  return mds;
+}
+
+void MDSIOContextWrapper::finish(int r)
+{
+  fin->complete(r);
+}
+
+void C_IO_Wrapper::complete(int r)
+{
+  if (async) {
+    async = false;
+    get_mds()->finisher->queue(this, r);
+  } else {
+    MDSIOContext::complete(r);
+  }
+}
+
+MDSRank *MDSInternalContextGather::get_mds()
+{
+  derr << "Forbidden call to MDSInternalContextGather::get_mds by " << typeid(*this).name() << dendl;
+  ceph_abort();
+}
+