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diff --git a/src/ceph/src/test/filestore/TestFileStore.cc b/src/ceph/src/test/filestore/TestFileStore.cc
new file mode 100644
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+++ b/src/ceph/src/test/filestore/TestFileStore.cc
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+// -*- 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) 2014 Cloudwatt <libre.licensing@cloudwatt.com>
+ *
+ * Author: Loic Dachary <loic@dachary.org>
+ *
+ * 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 "common/ceph_argparse.h"
+#include "global/global_init.h"
+#include "os/filestore/FileStore.h"
+#include <gtest/gtest.h>
+
+class TestFileStore {
+public:
+  static void create_backend(FileStore &fs, long f_type) {
+    fs.create_backend(f_type);
+  }
+};
+
+TEST(FileStore, create)
+{
+  {
+    map<string,string> pm;
+    FileStore fs(g_ceph_context, "a", "b");
+    TestFileStore::create_backend(fs, 0);
+    fs.collect_metadata(&pm);
+    ASSERT_EQ(pm["filestore_backend"], "generic");
+  }
+#if defined(__linux__)
+  {
+    map<string,string> pm;
+    FileStore fs(g_ceph_context, "a", "b");
+    TestFileStore::create_backend(fs, BTRFS_SUPER_MAGIC);
+    fs.collect_metadata(&pm);
+    ASSERT_EQ(pm["filestore_backend"], "btrfs");
+  }
+# ifdef HAVE_LIBXFS
+  {
+    map<string,string> pm;
+    FileStore fs(g_ceph_context, "a", "b");
+    TestFileStore::create_backend(fs, XFS_SUPER_MAGIC);
+    fs.collect_metadata(&pm);
+    ASSERT_EQ(pm["filestore_backend"], "xfs");
+  }
+# endif
+#endif
+#ifdef HAVE_LIBZFS
+  {
+    map<string,string> pm;
+    FileStore fs("a", "b");
+    TestFileStore::create_backend(fs, ZFS_SUPER_MAGIC);
+    fs.collect_metadata(&pm);
+    ASSERT_EQ(pm["filestore_backend"], "zfs");
+  }
+#endif
+}
+
+int main(int argc, char **argv) {
+  vector<const char*> args;
+  argv_to_vec(argc, (const char **)argv, args);
+
+  auto cct = global_init(NULL, args, CEPH_ENTITY_TYPE_CLIENT,
+			 CODE_ENVIRONMENT_UTILITY, 0);
+  common_init_finish(g_ceph_context);
+  g_ceph_context->_conf->set_val("osd_journal_size", "100");
+  g_ceph_context->_conf->apply_changes(NULL);
+
+  ::testing::InitGoogleTest(&argc, argv);
+  return RUN_ALL_TESTS();
+}
+
+/*
+ * Local Variables:
+ * compile-command: "cd ../.. ; make ceph_test_filestore && 
+ *    ./ceph_test_filestore \
+ *        --gtest_filter=*.* --log-to-stderr=true --debug-filestore=20
+ *  "
+ * End:
+ */