68   virtual Status NewWritableFile(const std::string& fname,  in NewWritableFile()
74       return Status::IOError(fname, "fake error");  in NewWritableFile()
178   virtual Status status() const override { return Status::OK(); }  in status()
212   virtual Status Truncate(uint64_t size) override {  in Truncate()
214     return Status::OK();  in Truncate()
216   virtual Status Close() override { return Status::OK(); }  in Close()
217   virtual Status Flush() override {  in Flush()
227     return Status::OK();  in Flush()
229   virtual Status Sync() override { return Status::OK(); }  in Sync()
230   virtual Status Append(const Slice& slice) override {  in Append()
232     return Status::OK();  in Append()
253   Status Write(uint64_t offset, const Slice& data) override {  in Write()
260     return Status::OK();  in Write()
263   Status Read(uint64_t offset, size_t n, Slice* result,  in Read()
271     return Status::OK();  in Read()
274   Status Flush() override { return Status::OK(); }  in Flush()
276   Status Sync() override { return Status::OK(); }  in Sync()
278   Status Close() override { return Status::OK(); }  in Close()
299   virtual Status Truncate(uint64_t size) override {  in Truncate()
301     return Status::OK();  in Truncate()
303   virtual Status Close() override { return Status::OK(); }  in Close()
304   virtual Status Flush() override {  in Flush()
311     return Status::OK();  in Flush()
313   virtual Status Sync() override { return Status::OK(); }  in Sync()
314   virtual Status Append(const Slice& slice) override {  in Append()
316     return Status::OK();  in Append()
342   virtual Status Read(uint64_t offset, size_t n, Slice* result,  in Read()
346       return Status::InvalidArgument("invalid Read offset");  in Read()
357     return Status::OK();  in Read()
536     Status Read(size_t n, Slice* result, char* scratch) override {  in Read()
544         return Status::InvalidArgument(  in Read()
548       return Status::OK();  in Read()
550     Status Skip(uint64_t n) override {  in Skip()
552         return Status::InvalidArgument(  in Skip()
557       return Status::OK();  in Skip()
572       virtual Status Truncate(uint64_t size) override {  in Truncate()
574         return Status::OK();  in Truncate()
576       virtual Status Close() override { return Status::OK(); }  in Close()
577       virtual Status Flush() override { return Status::OK(); }  in Flush()
578       virtual Status Sync() override { return Status::OK(); }  in Sync()
579       virtual Status Append(const Slice& slice) override {  in Append()
581         return Status::OK();  in Append()
593     const Status WriteToNewFile(const std::string& file_name,  in WriteToNewFile()
604       return Status::OK();  in WriteToNewFile()
608     Status NewSequentialFile(const std::string& f,  in NewSequentialFile()
613         return Status::NotFound("The specified file does not exist", f);  in NewSequentialFile()
616       return Status::OK();  in NewSequentialFile()
618     Status NewRandomAccessFile(const std::string& /*f*/,  in NewRandomAccessFile()
621       return Status::NotSupported();  in NewRandomAccessFile()
623     Status NewWritableFile(const std::string& f,  in NewWritableFile()
628         return Status::IOError("The specified file already exists", f);  in NewWritableFile()
631       return Status::OK();  in NewWritableFile()
633     virtual Status NewDirectory(  in NewDirectory()
636       return Status::NotSupported();  in NewDirectory()
638     Status FileExists(const std::string& f) override {  in FileExists()
640         return Status::NotFound();  in FileExists()
642       return Status::OK();  in FileExists()
644     Status GetChildren(const std::string& /*dir*/,  in GetChildren()
646       return Status::NotSupported();  in GetChildren()
648     Status DeleteFile(const std::string& f) override {  in DeleteFile()
650       return Status::OK();  in DeleteFile()
652     Status CreateDir(const std::string& /*d*/) override {  in CreateDir()
653       return Status::NotSupported();  in CreateDir()
655     Status CreateDirIfMissing(const std::string& /*d*/) override {  in CreateDirIfMissing()
656       return Status::NotSupported();  in CreateDirIfMissing()
658     Status DeleteDir(const std::string& /*d*/) override {  in DeleteDir()
659       return Status::NotSupported();  in DeleteDir()
661     Status GetFileSize(const std::string& f, uint64_t* s) override {  in GetFileSize()
664         return Status::NotFound("The specified file does not exist:", f);  in GetFileSize()
667       return Status::OK();  in GetFileSize()
670     Status GetFileModificationTime(const std::string& /*fname*/,  in GetFileModificationTime()
672       return Status::NotSupported();  in GetFileModificationTime()
675     Status RenameFile(const std::string& /*s*/,  in RenameFile()
677       return Status::NotSupported();  in RenameFile()
680     Status LinkFile(const std::string& /*s*/,  in LinkFile()
682       return Status::NotSupported();  in LinkFile()
685     Status LockFile(const std::string& /*f*/, FileLock** /*l*/) override {  in LockFile()
686       return Status::NotSupported();  in LockFile()
689     Status UnlockFile(FileLock* /*l*/) override {  in UnlockFile()
690       return Status::NotSupported();  in UnlockFile()
794 Status DestroyDir(Env* env, const std::string& dir);