initial code repo

[stor4nfv.git] / src / ceph / src / erasure-code / isa / ErasureCodePluginIsa.cc

diff --git a/src/ceph/src/erasure-code/isa/ErasureCodePluginIsa.cc b/src/ceph/src/erasure-code/isa/ErasureCodePluginIsa.cc
new file mode 100644 (file)
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+++ b/src/ceph/src/erasure-code/isa/ErasureCodePluginIsa.cc
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+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2014 CERN (Switzerland)
+ *
+ * Author: Andreas-Joachim Peters <Andreas.Joachim.Peters@cern.ch>
+ *
+ *  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.
+ *
+ */
+
+
+/**
+ * @file   ErasureCodePluginIsa.cc
+ *
+ * @brief  Erasure Code Plug-in class wrapping the INTEL ISA-L library
+ *
+ * The factory plug-in class allows to call individual encoding techniques.
+ * The INTEL ISA-L library provides two pre-defined encoding matrices
+ * (cauchy, reed_sol_van = default).
+ */
+
+// -----------------------------------------------------------------------------
+#include "ceph_ver.h"
+#include "include/buffer.h"
+#include "ErasureCodePluginIsa.h"
+#include "ErasureCodeIsa.h"
+// -----------------------------------------------------------------------------
+
+int ErasureCodePluginIsa::factory(const std::string &directory,
+                     ErasureCodeProfile &profile,
+                      ErasureCodeInterfaceRef *erasure_code,
+                      std::ostream *ss)
+{
+    ErasureCodeIsa *interface;
+    std::string t;
+    if (profile.find("technique") == profile.end())
+      profile["technique"] = "reed_sol_van";
+    t = profile.find("technique")->second;
+    if ((t == "reed_sol_van")) {
+      interface = new ErasureCodeIsaDefault(tcache,
+                                            ErasureCodeIsaDefault::kVandermonde);
+    } else {
+      if ((t == "cauchy")) {
+        interface = new ErasureCodeIsaDefault(tcache,
+                                              ErasureCodeIsaDefault::kCauchy);
+      } else {
+        *ss << "technique=" << t << " is not a valid coding technique. "
+          << " Choose one of the following: "
+          << "reed_sol_van,"
+          << "cauchy" << std::endl;
+        return -ENOENT;
+      }
+    }
+
+    int r = interface->init(profile, ss);
+    if (r) {
+      delete interface;
+      return r;
+    }
+    *erasure_code = ErasureCodeInterfaceRef(interface);
+    return 0;
+}
+
+#ifndef BUILDING_FOR_EMBEDDED
+
+// -----------------------------------------------------------------------------
+
+const char *__erasure_code_version()
+{
+  return CEPH_GIT_NICE_VER;
+}
+
+// -----------------------------------------------------------------------------
+
+int __erasure_code_init(char *plugin_name, char *directory)
+{
+  ErasureCodePluginRegistry &instance = ErasureCodePluginRegistry::instance();
+
+  return instance.add(plugin_name, new ErasureCodePluginIsa());
+}
+
+#endif