312                               const IOOptions& options,
322   virtual IOStatus GetChildren(const std::string& dir, const IOOptions& options,
337       const std::string& dir, const IOOptions& options,  in GetChildrenFileAttributes()  argument
341     IOStatus s = GetChildren(dir, options, &child_fnames, dbg);  in GetChildrenFileAttributes()
349       if (!(s = GetFileSize(path, options, &(*result)[result_size].size_bytes,  in GetChildrenFileAttributes()
352         if (FileExists(path, options, dbg).IsNotFound()) {  in GetChildrenFileAttributes()
367                               const IOOptions& options,
379                              const IOOptions& options, IODebugContext* dbg) = 0;
384                                       const IOOptions& options,
389                              const IOOptions& options, IODebugContext* dbg) = 0;
393                                const IOOptions& options, uint64_t* file_size,
398                                            const IOOptions& options,
403                               const IOOptions& options,
442   virtual IOStatus LockFile(const std::string& fname, const IOOptions& options,
448   virtual IOStatus UnlockFile(FileLock* lock, const IOOptions& options,
455   virtual IOStatus GetTestDirectory(const IOOptions& options, std::string* path,
467                                    const IOOptions& options,
546   virtual IOStatus Read(size_t n, const IOOptions& options, Slice* result,
623   virtual IOStatus Read(uint64_t offset, size_t n, const IOOptions& options,
642                              const IOOptions& options, IODebugContext* dbg) {  in MultiRead()  argument
647           Read(req.offset, req.len, options, &req.result, req.scratch, dbg);  in MultiRead()
707   explicit FSWritableFile(const FileOptions& options)  in FSWritableFile()  argument
712         strict_bytes_per_sync_(options.strict_bytes_per_sync) {}  in FSWritableFile()
719   virtual IOStatus Append(const Slice& data, const IOOptions& options,
757   virtual IOStatus Close(const IOOptions& options, IODebugContext* dbg) = 0;
758   virtual IOStatus Flush(const IOOptions& options, IODebugContext* dbg) = 0;
759   virtual IOStatus Sync(const IOOptions& options,
768   virtual IOStatus Fsync(const IOOptions& options, IODebugContext* dbg) {  in Fsync()  argument
769     return Sync(options, dbg);  in Fsync()
837                              const IOOptions& options, IODebugContext* dbg) {  in RangeSync()  argument
839       return Sync(options, dbg);  in RangeSync()
849   virtual void PrepareWrite(size_t offset, size_t len, const IOOptions& options,  in PrepareWrite()  argument
864                block_size * num_spanned_blocks, options, dbg);  in PrepareWrite()
913                          const IOOptions& options, IODebugContext* dbg) = 0;
918   virtual IOStatus Read(uint64_t offset, size_t n, const IOOptions& options,
922   virtual IOStatus Flush(const IOOptions& options, IODebugContext* dbg) = 0;
924   virtual IOStatus Sync(const IOOptions& options, IODebugContext* dbg) = 0;
926   virtual IOStatus Fsync(const IOOptions& options, IODebugContext* dbg) {  in Fsync()  argument
927     return Sync(options, dbg);  in Fsync()
930   virtual IOStatus Close(const IOOptions& options, IODebugContext* dbg) = 0;
968   virtual IOStatus Fsync(const IOOptions& options, IODebugContext* dbg) = 0;
1077                                      const IOOptions& options,  in GetChildrenFileAttributes()  argument
1080     return target_->GetChildrenFileAttributes(dir, options, result, dbg);  in GetChildrenFileAttributes()
1082   IOStatus DeleteFile(const std::string& f, const IOOptions& options,  in DeleteFile()  argument
1084     return target_->DeleteFile(f, options, dbg);  in DeleteFile()
1087                     const IOOptions& options, IODebugContext* dbg) override {  in Truncate()  argument
1088     return target_->Truncate(fname, size, options, dbg);  in Truncate()
1090   IOStatus CreateDir(const std::string& d, const IOOptions& options,  in CreateDir()  argument
1092     return target_->CreateDir(d, options, dbg);  in CreateDir()
1094   IOStatus CreateDirIfMissing(const std::string& d, const IOOptions& options,  in CreateDirIfMissing()  argument
1096     return target_->CreateDirIfMissing(d, options, dbg);  in CreateDirIfMissing()
1098   IOStatus DeleteDir(const std::string& d, const IOOptions& options,  in DeleteDir()  argument
1100     return target_->DeleteDir(d, options, dbg);  in DeleteDir()
1102   IOStatus GetFileSize(const std::string& f, const IOOptions& options,  in GetFileSize()  argument
1104     return target_->GetFileSize(f, options, s, dbg);  in GetFileSize()
1108                                    const IOOptions& options,  in GetFileModificationTime()  argument
1111     return target_->GetFileModificationTime(fname, options, file_mtime, dbg);  in GetFileModificationTime()
1114   IOStatus GetAbsolutePath(const std::string& db_path, const IOOptions& options,  in GetAbsolutePath()  argument
1117     return target_->GetAbsolutePath(db_path, options, output_path, dbg);  in GetAbsolutePath()
1121                       const IOOptions& options, IODebugContext* dbg) override {  in RenameFile()  argument
1122     return target_->RenameFile(s, t, options, dbg);  in RenameFile()
1126                     const IOOptions& options, IODebugContext* dbg) override {  in LinkFile()  argument
1127     return target_->LinkFile(s, t, options, dbg);  in LinkFile()
1130   IOStatus NumFileLinks(const std::string& fname, const IOOptions& options,  in NumFileLinks()  argument
1132     return target_->NumFileLinks(fname, options, count, dbg);  in NumFileLinks()
1136                         const IOOptions& options, bool* res,  in AreFilesSame()  argument
1138     return target_->AreFilesSame(first, second, options, res, dbg);  in AreFilesSame()
1141   IOStatus LockFile(const std::string& f, const IOOptions& options,  in LockFile()  argument
1143     return target_->LockFile(f, options, l, dbg);  in LockFile()
1146   IOStatus UnlockFile(FileLock* l, const IOOptions& options,  in UnlockFile()  argument
1148     return target_->UnlockFile(l, options, dbg);  in UnlockFile()
1151   IOStatus GetTestDirectory(const IOOptions& options, std::string* path,  in GetTestDirectory()  argument
1153     return target_->GetTestDirectory(options, path, dbg);  in GetTestDirectory()
1155   IOStatus NewLogger(const std::string& fname, const IOOptions& options,  in NewLogger()  argument
1158     return target_->NewLogger(fname, options, result, dbg);  in NewLogger()
1192   IOStatus GetFreeSpace(const std::string& path, const IOOptions& options,  in GetFreeSpace()  argument
1194     return target_->GetFreeSpace(path, options, diskfree, dbg);  in GetFreeSpace()
1206   IOStatus Read(size_t n, const IOOptions& options, Slice* result,  in Read()  argument
1208     return target_->Read(n, options, result, scratch, dbg);  in Read()
1218   IOStatus PositionedRead(uint64_t offset, size_t n, const IOOptions& options,  in PositionedRead()  argument
1221     return target_->PositionedRead(offset, n, options, result, scratch, dbg);  in PositionedRead()
1233   IOStatus Read(uint64_t offset, size_t n, const IOOptions& options,  in Read()  argument
1236     return target_->Read(offset, n, options, result, scratch, dbg);  in Read()
1239                      const IOOptions& options, IODebugContext* dbg) override {  in MultiRead()  argument
1240     return target_->MultiRead(reqs, num_reqs, options, dbg);  in MultiRead()
1242   IOStatus Prefetch(uint64_t offset, size_t n, const IOOptions& options,  in Prefetch()  argument
1244     return target_->Prefetch(offset, n, options, dbg);  in Prefetch()
1266   IOStatus Append(const Slice& data, const IOOptions& options,  in Append()  argument
1268     return target_->Append(data, options, dbg);  in Append()
1271                             const IOOptions& options,  in PositionedAppend()  argument
1273     return target_->PositionedAppend(data, offset, options, dbg);  in PositionedAppend()
1275   IOStatus Truncate(uint64_t size, const IOOptions& options,  in Truncate()  argument
1277     return target_->Truncate(size, options, dbg);  in Truncate()
1279   IOStatus Close(const IOOptions& options, IODebugContext* dbg) override {  in Close()  argument
1280     return target_->Close(options, dbg);  in Close()
1282   IOStatus Flush(const IOOptions& options, IODebugContext* dbg) override {  in Flush()  argument
1283     return target_->Flush(options, dbg);  in Flush()
1285   IOStatus Sync(const IOOptions& options, IODebugContext* dbg) override {  in Sync()  argument
1286     return target_->Sync(options, dbg);  in Sync()
1288   IOStatus Fsync(const IOOptions& options, IODebugContext* dbg) override {  in Fsync()  argument
1289     return target_->Fsync(options, dbg);  in Fsync()
1307   uint64_t GetFileSize(const IOOptions& options, IODebugContext* dbg) override {  in GetFileSize()  argument
1308     return target_->GetFileSize(options, dbg);  in GetFileSize()
1328   IOStatus RangeSync(uint64_t offset, uint64_t nbytes, const IOOptions& options,  in RangeSync()  argument
1330     return target_->RangeSync(offset, nbytes, options, dbg);  in RangeSync()
1333   void PrepareWrite(size_t offset, size_t len, const IOOptions& options,  in PrepareWrite()  argument
1335     target_->PrepareWrite(offset, len, options, dbg);  in PrepareWrite()
1338   IOStatus Allocate(uint64_t offset, uint64_t len, const IOOptions& options,  in Allocate()  argument
1340     return target_->Allocate(offset, len, options, dbg);  in Allocate()
1355   IOStatus Write(uint64_t offset, const Slice& data, const IOOptions& options,  in Write()  argument
1357     return target_->Write(offset, data, options, dbg);  in Write()
1359   IOStatus Read(uint64_t offset, size_t n, const IOOptions& options,  in Read()  argument
1362     return target_->Read(offset, n, options, result, scratch, dbg);  in Read()
1364   IOStatus Flush(const IOOptions& options, IODebugContext* dbg) override {  in Flush()  argument
1365     return target_->Flush(options, dbg);  in Flush()
1367   IOStatus Sync(const IOOptions& options, IODebugContext* dbg) override {  in Sync()  argument
1368     return target_->Sync(options, dbg);  in Sync()
1370   IOStatus Fsync(const IOOptions& options, IODebugContext* dbg) override {  in Fsync()  argument
1371     return target_->Fsync(options, dbg);  in Fsync()
1373   IOStatus Close(const IOOptions& options, IODebugContext* dbg) override {  in Close()  argument
1374     return target_->Close(options, dbg);  in Close()
1385   IOStatus Fsync(const IOOptions& options, IODebugContext* dbg) override {  in Fsync()  argument
1386     return target_->Fsync(options, dbg);  in Fsync()