Implement CryOpenFile::flush

src/CryOpenFile.cpp

@@ -27,7 +27,7 @@ CryOpenFile::~CryOpenFile() {
 }
 
 void CryOpenFile::flush() {
-  //throw FuseErrnoException(ENOTSUP);
+  _fileBlob->flush();
 }
 
 void CryOpenFile::stat(struct ::stat *result) const {

src/impl/FileBlob.cpp

@@ -39,6 +39,10 @@ void FileBlob::write(const void *source, uint64_t offset, uint64_t count) {
   _blob->write(source, offset + 1, count);
 }
 
+void FileBlob::flush() {
+  _blob->flush();
+}
+
 blockstore::Key FileBlob::key() const {
   	return _blob->key();
 }

src/impl/FileBlob.h

@@ -16,6 +16,7 @@ public:
 
   ssize_t read(void *target, uint64_t offset, uint64_t count) const;
   void write(const void *source, uint64_t offset, uint64_t count);
+  void flush();
 
   void resize(off_t size);
   off_t size() const;