erasure-code: implement get_profile for every plugins

The ErasureCode::init function is implemented to store the profile and
is called by the init method of each plugin. The
ErasureCode::get_profile function is implemented to return the profile
that was stored. A specialized ostream<< function is implemented to
facilitate the display of the profile.

Signed-off-by: Loic Dachary <ldachary@redhat.com>

src/erasure-code/ErasureCode.h

@@ -33,9 +33,19 @@ namespace ceph {
     static const unsigned SIMD_ALIGN;
 
     vector<int> chunk_mapping;
+    ErasureCodeProfile _profile;
 
     virtual ~ErasureCode() {}
 
+    virtual int init(ErasureCodeProfile &profile, ostream *ss) {
+      _profile = profile;
+      return 0;
+    }
+
+    virtual const ErasureCodeProfile &get_profile() const {
+      return _profile;
+    }
+
     virtual unsigned int get_coding_chunk_count() const {
       return get_chunk_count() - get_data_chunk_count();
     }

src/erasure-code/ErasureCodeInterface.h

@@ -153,6 +153,20 @@ using namespace std;
 namespace ceph {
 
   typedef map<std::string,std::string> ErasureCodeProfile;
+
+  inline ostream& operator<<(ostream& out, const ErasureCodeProfile& profile) {
+    out << "{";
+    for (ErasureCodeProfile::const_iterator it = profile.begin();
+	 it != profile.end();
+	 ++it) {
+      if (it != profile.begin()) out << ",";
+      out << it->first << "=" << it->second;
+    }
+    out << "}";
+    return out;
+  }
+
+
   class ErasureCodeInterface {
   public:
     virtual ~ErasureCodeInterface() {}

src/erasure-code/isa/ErasureCodeIsa.cc

@@ -80,6 +80,7 @@ ErasureCodeIsa::init(ErasureCodeProfile &profile, ostream *ss)
   if (err)
     return err;
   prepare();
+  ErasureCode::init(profile, ss);
   return err;
 }
 

src/erasure-code/jerasure/ErasureCodeJerasure.cc

@@ -67,6 +67,7 @@ int ErasureCodeJerasure::init(ErasureCodeProfile& profile, ostream *ss)
   if (err)
     return err;
   prepare();
+  ErasureCode::init(profile, ss);
   return err;
 }
 

src/erasure-code/lrc/ErasureCodeLrc.cc

@@ -534,6 +534,7 @@ int ErasureCodeLrc::init(ErasureCodeProfile &profile,
     profile.erase("mapping");
     profile.erase("layers");
   }
+  ErasureCode::init(profile, ss);
   return 0;
 }
 

src/erasure-code/shec/ErasureCodeShec.cc

@@ -68,6 +68,7 @@ int ErasureCodeShec::init(ErasureCodeProfile &profile,
   if (err)
     return err;
   prepare();
+  ErasureCode::init(profile, ss);
   return err;
 }
 

src/test/erasure-code/ErasureCodeExample.h

@@ -39,10 +39,6 @@ class ErasureCodeExample : public ErasureCode {
 public:
   virtual ~ErasureCodeExample() {}
 
-  virtual int init(ErasureCodeProfile &profile, ostream *ss) {
-    return 0;
-  }
-
   virtual int create_ruleset(const string &name,
 			     CrushWrapper &crush,
 			     ostream *ss) const {

src/test/erasure-code/ErasureCodePluginExample.cc

@@ -28,6 +28,7 @@ public:
 		      ostream *ss)
   {
     *erasure_code = ErasureCodeInterfaceRef(new ErasureCodeExample());
+    (*erasure_code)->init(profile, ss);
     return 0;
   }
 };

src/test/erasure-code/Makefile.am

@@ -35,7 +35,9 @@ ceph_erasure_code_LDADD += -ldl
 endif
 bin_DEBUGPROGRAMS += ceph_erasure_code
 
-libec_example_la_SOURCES = test/erasure-code/ErasureCodePluginExample.cc
+libec_example_la_SOURCES = \
+	erasure-code/ErasureCode.cc \
+	test/erasure-code/ErasureCodePluginExample.cc
 test/erasure-code/ErasureCodePluginExample.cc: ./ceph_ver.h
 libec_example_la_CFLAGS = ${AM_CFLAGS}
 libec_example_la_CXXFLAGS= ${AM_CXXFLAGS}