DB::GetOptions()

Summary: We need access to options for BackupableDB

Test Plan: make check

Reviewers: dhruba

Reviewed By: dhruba

CC: leveldb, reconnect.grayhat

Differential Revision: https://reviews.facebook.net/D14331

include/rocksdb/db.h

@@ -231,6 +231,9 @@ class DB {
   // Get Env object from the DB
   virtual Env* GetEnv() const = 0;
 
+  // Get DB Options that we use
+  virtual const Options& GetOptions() const = 0;
+
   // Flush all mem-table data.
   virtual Status Flush(const FlushOptions& options) = 0;
 

include/utilities/stackable_db.h

@@ -107,6 +107,10 @@ class StackableDB : public DB {
     return db_->GetEnv();
   }
 
+  virtual const Options& GetOptions() const override {
+    return db_->GetOptions();
+  }
+
   virtual Status Flush(const FlushOptions& fopts) override {
     return db_->Flush(fopts);
   }