ceph/src/erasure-code/jerasure/ErasureCodePluginJerasure.cc

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3 /*
   4  * Ceph distributed storage system
   5  *
   6  * Copyright (C) 2013,2014 Cloudwatt <libre.licensing@cloudwatt.com>
   7  * Copyright (C) 2014 Red Hat <contact@redhat.com>
   8  *
   9  * Author: Loic Dachary <loic@dachary.org>
  10  *
  11  *  This library is free software; you can redistribute it and/or
  12  *  modify it under the terms of the GNU Lesser General Public
  13  *  License as published by the Free Software Foundation; either
  14  *  version 2.1 of the License, or (at your option) any later version.
  15  *
  16  */
  17
  18 #include "ceph_ver.h"
  19 #include "common/debug.h"
  20 #include "ErasureCodeJerasure.h"
  21 #include "ErasureCodePluginJerasure.h"
  22 #include "jerasure_init.h"
  23
  24 #define dout_context g_ceph_context
  25 #define dout_subsys ceph_subsys_osd
  26 #undef dout_prefix
  27 #define dout_prefix _prefix(_dout)
  28
  29 static ostream& _prefix(std::ostream* _dout)
  30 {
  31   return *_dout << "ErasureCodePluginJerasure: ";
  32 }
  33
  34 int ErasureCodePluginJerasure::factory(const std::string& directory,
  35                       ErasureCodeProfile &profile,
  36                       ErasureCodeInterfaceRef *erasure_code,
  37                       std::ostream *ss) {
  38     ErasureCodeJerasure *interface;
  39     std::string t;
  40     if (profile.find("technique") != profile.end())
  41       t = profile.find("technique")->second;
  42     if (t == "reed_sol_van") {
  43       interface = new ErasureCodeJerasureReedSolomonVandermonde();
  44     } else if (t == "reed_sol_r6_op") {
  45       interface = new ErasureCodeJerasureReedSolomonRAID6();
  46     } else if (t == "cauchy_orig") {
  47       interface = new ErasureCodeJerasureCauchyOrig();
  48     } else if (t == "cauchy_good") {
  49       interface = new ErasureCodeJerasureCauchyGood();
  50     } else if (t == "liberation") {
  51       interface = new ErasureCodeJerasureLiberation();
  52     } else if (t == "blaum_roth") {
  53       interface = new ErasureCodeJerasureBlaumRoth();
  54     } else if (t == "liber8tion") {
  55       interface = new ErasureCodeJerasureLiber8tion();
  56     } else {
  57       derr << "technique=" << t << " is not a valid coding technique. "
  58            << " Choose one of the following: "
  59            << "reed_sol_van, reed_sol_r6_op, cauchy_orig, "
  60            << "cauchy_good, liberation, blaum_roth, liber8tion"
  61            << dendl;
  62       return -ENOENT;
  63     }
  64     dout(20) << __func__ << ": " << profile << dendl;
  65     int r = interface->init(profile, ss);
  66     if (r) {
  67       delete interface;
  68       return r;
  69     }
  70     *erasure_code = ErasureCodeInterfaceRef(interface);
  71     return 0;
  72 }
  73
  74 #ifndef BUILDING_FOR_EMBEDDED
  75
  76 const char *__erasure_code_version() { return CEPH_GIT_NICE_VER; }
  77
  78 int __erasure_code_init(char *plugin_name, char *directory)
  79 {
  80   ErasureCodePluginRegistry &instance = ErasureCodePluginRegistry::instance();
  81   int w[] = { 4, 8, 16, 32 };
  82   int r = jerasure_init(4, w);
  83   if (r) {
  84     return -r;
  85   }
  86   return instance.add(plugin_name, new ErasureCodePluginJerasure());
  87 }
  88
  89 #endif