ErasureCodeJerasure: define technique BlaumRoth

technique == "blaum_roth"

       ErasureCodeInterface (abstract)
       |
       -> ErasureCodeJerasure (abstract)
          |
          -> ErasureCodeJerasureLiberation
             |
             -> ErasureCodeJerasureBlaumRoth
                | == blaum_roth

Derived from Liberation it only overloads the prepare method to use
blaum_roth_coding_bitmatrix.

https://github.com/dachary/ceph/tree/wip-5879 refs #5879

Signed-off-by: Loic Dachary <loic@dachary.org>

3 files changed, 18 insertions, 0 deletions

diff --git a/src/osd/ErasureCodePluginJerasure/ErasureCodeJerasure.cc b/src/osd/ErasureCodePluginJerasure/ErasureCodeJerasure.cc
index 386a025d621..7fb95177779 100644
--- a/src/osd/ErasureCodePluginJerasure/ErasureCodeJerasure.cc
+++ b/src/osd/ErasureCodePluginJerasure/ErasureCodeJerasure.cc
@@ -349,3 +349,11 @@ void ErasureCodeJerasureLiberation::prepare() {
   bitmatrix = liberation_coding_bitmatrix(k, w);
   schedule = jerasure_smart_bitmatrix_to_schedule(k, m, w, bitmatrix);
 }
+
+// 
+// ErasureCodeJerasureBlaumRoth
+//
+void ErasureCodeJerasureBlaumRoth::prepare() {
+  bitmatrix = blaum_roth_coding_bitmatrix(k, w);
+  schedule = jerasure_smart_bitmatrix_to_schedule(k, m, w, bitmatrix);
+}
diff --git a/src/osd/ErasureCodePluginJerasure/ErasureCodeJerasure.h b/src/osd/ErasureCodePluginJerasure/ErasureCodeJerasure.h
index 00f7599f1fd..ddf6c7dcfd1 100644
--- a/src/osd/ErasureCodePluginJerasure/ErasureCodeJerasure.h
+++ b/src/osd/ErasureCodePluginJerasure/ErasureCodeJerasure.h
@@ -200,4 +200,13 @@ public:
   virtual void parse(const map<std::string,std::string> &parameters);
   virtual void prepare();
 };
+
+class ErasureCodeJerasureBlaumRoth : public ErasureCodeJerasureLiberation {
+public:
+  ErasureCodeJerasureBlaumRoth() :
+    ErasureCodeJerasureLiberation("blaum_roth")
+  {}
+
+  virtual void prepare();
+};
 #endif
diff --git a/src/test/osd/TestErasureCodeJerasure.cc b/src/test/osd/TestErasureCodeJerasure.cc
index b46e1bd0d62..dfbd740e363 100644
--- a/src/test/osd/TestErasureCodeJerasure.cc
+++ b/src/test/osd/TestErasureCodeJerasure.cc
@@ -31,6 +31,7 @@ typedef ::testing::Types<
   ErasureCodeJerasureCauchyOrig,
   ErasureCodeJerasureCauchyGood,
   ErasureCodeJerasureLiberation,
+  ErasureCodeJerasureBlaumRoth,
 > JerasureTypes;
 TYPED_TEST_CASE(ErasureCodeTest, JerasureTypes);