212   virtual IOStatus NewSequentialFile(const std::string& fname,
225       const std::string& fname, const FileOptions& file_opts,
246   virtual IOStatus NewWritableFile(const std::string& fname,
265   virtual IOStatus ReuseWritableFile(const std::string& fname,
311   virtual IOStatus FileExists(const std::string& fname,
366   virtual IOStatus DeleteFile(const std::string& fname,
392   virtual IOStatus GetFileSize(const std::string& fname,
397   virtual IOStatus GetFileModificationTime(const std::string& fname,
442   virtual IOStatus LockFile(const std::string& fname, const IOOptions& options,
461   virtual IOStatus NewLogger(const std::string& fname, const IOOptions& io_opts,
1037   IOStatus ReopenWritableFile(const std::string& fname,  in ReopenWritableFile()  argument
1041     return target_->ReopenWritableFile(fname, file_opts, result, dbg);  in ReopenWritableFile()
1043   IOStatus ReuseWritableFile(const std::string& fname,  in ReuseWritableFile()  argument
1048     return target_->ReuseWritableFile(fname, old_fname, file_opts, r,  in ReuseWritableFile()
1051   IOStatus NewRandomRWFile(const std::string& fname,  in NewRandomRWFile()  argument
1055     return target_->NewRandomRWFile(fname, file_opts, result, dbg);  in NewRandomRWFile()
1058       const std::string& fname,  in NewMemoryMappedFileBuffer()  argument
1060     return target_->NewMemoryMappedFileBuffer(fname, result);  in NewMemoryMappedFileBuffer()
1086   IOStatus Truncate(const std::string& fname, size_t size,  in Truncate()  argument
1088     return target_->Truncate(fname, size, options, dbg);  in Truncate()
1107   IOStatus GetFileModificationTime(const std::string& fname,  in GetFileModificationTime()  argument
1111     return target_->GetFileModificationTime(fname, options, file_mtime, dbg);  in GetFileModificationTime()
1130   IOStatus NumFileLinks(const std::string& fname, const IOOptions& options,  in NumFileLinks()  argument
1132     return target_->NumFileLinks(fname, options, count, dbg);  in NumFileLinks()
1155   IOStatus NewLogger(const std::string& fname, const IOOptions& options,  in NewLogger()  argument
1158     return target_->NewLogger(fname, options, result, dbg);  in NewLogger()
1398                                   const std::string& fname,
1402 extern IOStatus ReadFileToString(FileSystem* fs, const std::string& fname,