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diff --git a/src/ceph/src/test/erasure-code/TestErasureCodePlugin.cc b/src/ceph/src/test/erasure-code/TestErasureCodePlugin.cc
new file mode 100644
index 0000000..5211690
--- /dev/null
+++ b/src/ceph/src/test/erasure-code/TestErasureCodePlugin.cc
@@ -0,0 +1,136 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- 
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph distributed storage system
+ *
+ * Copyright (C) 2013,2014 Cloudwatt <libre.licensing@cloudwatt.com>
+ * Copyright (C) 2014 Red Hat <contact@redhat.com>
+ *
+ * Author: Loic Dachary <loic@dachary.org>
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ * 
+ */
+
+#include <errno.h>
+#include <signal.h>
+#include <stdlib.h>
+#include "common/Thread.h"
+#include "erasure-code/ErasureCodePlugin.h"
+#include "global/global_context.h"
+#include "common/config.h"
+#include "gtest/gtest.h"
+
+
+class ErasureCodePluginRegistryTest : public ::testing::Test {
+protected:
+
+  class Thread_factory : public Thread {
+  public:
+    static void cleanup(void *arg) {
+      ErasureCodePluginRegistry &instance = ErasureCodePluginRegistry::instance();
+      if (instance.lock.is_locked())
+        instance.lock.Unlock();
+    }
+
+    void *entry() override {
+      ErasureCodeProfile profile;
+      ErasureCodePluginRegistry &instance = ErasureCodePluginRegistry::instance();
+      ErasureCodeInterfaceRef erasure_code;
+      pthread_cleanup_push(cleanup, NULL);
+      instance.factory("hangs",
+		       g_conf->get_val<std::string>("erasure_code_dir"),
+		       profile, &erasure_code, &cerr);
+      pthread_cleanup_pop(0);
+      return NULL;
+    }
+  };
+
+};
+
+TEST_F(ErasureCodePluginRegistryTest, factory_mutex) {
+  ErasureCodePluginRegistry &instance = ErasureCodePluginRegistry::instance();
+
+  EXPECT_TRUE(instance.lock.TryLock());
+  instance.lock.Unlock();
+
+  // 
+  // Test that the loading of a plugin is protected by a mutex.
+  //
+  useconds_t delay = 0;
+  const useconds_t DELAY_MAX = 20 * 1000 * 1000;
+  Thread_factory sleep_forever;
+  sleep_forever.create("sleep_forever");
+  do {
+    cout << "Trying (1) with delay " << delay << "us\n";
+    if (delay > 0)
+      usleep(delay);
+    if (!instance.loading)
+      delay = ( delay + 1 ) * 2;
+  } while(!instance.loading && delay < DELAY_MAX);
+  ASSERT_TRUE(delay < DELAY_MAX);
+
+  EXPECT_FALSE(instance.lock.TryLock());
+
+  EXPECT_EQ(0, pthread_cancel(sleep_forever.get_thread_id()));
+  EXPECT_EQ(0, sleep_forever.join());
+}
+
+TEST_F(ErasureCodePluginRegistryTest, all)
+{
+  ErasureCodeProfile profile;
+  const char* env = getenv("CEPH_LIB");
+  string directory(env ? env : ".libs");
+  ErasureCodeInterfaceRef erasure_code;
+  ErasureCodePluginRegistry &instance = ErasureCodePluginRegistry::instance();
+  EXPECT_FALSE(erasure_code);
+  EXPECT_EQ(-EIO, instance.factory("invalid",
+				   g_conf->get_val<std::string>("erasure_code_dir"),
+				   profile, &erasure_code, &cerr));
+  EXPECT_FALSE(erasure_code);
+  EXPECT_EQ(-EXDEV, instance.factory("missing_version",
+				     g_conf->get_val<std::string>("erasure_code_dir"),
+				     profile,
+				     &erasure_code, &cerr));
+  EXPECT_FALSE(erasure_code);
+  EXPECT_EQ(-ENOENT, instance.factory("missing_entry_point",
+				      g_conf->get_val<std::string>("erasure_code_dir"),
+				      profile,
+				      &erasure_code, &cerr));
+  EXPECT_FALSE(erasure_code);
+  EXPECT_EQ(-ESRCH, instance.factory("fail_to_initialize",
+				     g_conf->get_val<std::string>("erasure_code_dir"),
+				     profile,
+				     &erasure_code, &cerr));
+  EXPECT_FALSE(erasure_code);
+  EXPECT_EQ(-EBADF, instance.factory("fail_to_register",
+				     g_conf->get_val<std::string>("erasure_code_dir"),
+				     profile,
+				     &erasure_code, &cerr));
+  EXPECT_FALSE(erasure_code);
+  EXPECT_EQ(0, instance.factory("example",
+				g_conf->get_val<std::string>("erasure_code_dir"),
+				profile, &erasure_code, &cerr));
+  EXPECT_TRUE(erasure_code.get());
+  ErasureCodePlugin *plugin = 0;
+  {
+    Mutex::Locker l(instance.lock);
+    EXPECT_EQ(-EEXIST, instance.load("example", directory, &plugin, &cerr));
+    EXPECT_EQ(-ENOENT, instance.remove("does not exist"));
+    EXPECT_EQ(0, instance.remove("example"));
+    EXPECT_EQ(0, instance.load("example", directory, &plugin, &cerr));
+  }
+}
+
+/*
+ * Local Variables:
+ * compile-command: "cd ../.. ; make -j4 && 
+ *   make unittest_erasure_code_plugin && 
+ *   valgrind --tool=memcheck \
+ *      ./unittest_erasure_code_plugin \
+ *      --gtest_filter=*.* --log-to-stderr=true --debug-osd=20"
+ * End:
+ */