return err
	}
	return d.disk.WalkDir(ctx, opts, wr)
}

func (d *naughtyDisk) ListDir(ctx context.Context, origvolume, volume, dirPath string, count int) (entries []string, err error) {
	if err := d.calcError(); err != nil {
		return []string{}, err
	}
	return d.disk.ListDir(ctx, origvolume, volume, dirPath, count)
}

	DeleteBulk(ctx context.Context, volume string, paths ...string) error
	WriteMetadata(ctx context.Context, origvolume, volume, path string, fi FileInfo) error
	UpdateMetadata(ctx context.Context, volume, path string, fi FileInfo, opts UpdateMetadataOpts) error
	ReadVersion(ctx context.Context, origvolume, volume, path, versionID string, opts ReadOptions) (FileInfo, error)

}

func (client *storageRESTClient) WriteMetadata(ctx context.Context, origvolume, volume, path string, fi FileInfo) error {
	ctx, cancel := context.WithTimeout(ctx, globalDriveConfig.GetMaxTimeout())
	defer cancel()

	_, err := storageWriteMetadataRPC.Call(ctx, client.gridConn, &MetadataHandlerParams{
		DiskID:     *client.diskID.Load(),
		OrigVolume: origvolume,
		Volume:     volume,
		FilePath:   path,
		FI:         fi,
	})

}

// Returns streaming bitrot writer implementation.
func newStreamingBitrotWriter(disk StorageAPI, origvolume, volume, filePath string, length int64, algo BitrotAlgorithm, shardSize int64) io.Writer {
	h := algo.New()
	buf := globalBytePoolCap.Load().Get()
	rb := ringbuffer.NewBuffer(buf[:cap(buf)]).SetBlocking(true)

	if !s.checkID(p.DiskID) {
		return grid.NewNPErr(errDiskNotFound)
	}

	volume := p.Volume
	filePath := p.FilePath
	origvolume := p.OrigVolume

	err := s.getStorage().WriteMetadata(context.Background(), origvolume, volume, filePath, p.FI)
	return np, grid.NewRemoteErr(err)
}

// UpdateMetadataHandler update new updated metadata.

}

func (p *xlStorageDiskIDCheck) ListDir(ctx context.Context, origvolume, volume, dirPath string, count int) (s []string, err error) {
	ctx, done, err := p.TrackDiskHealth(ctx, storageMetricListDir, volume, dirPath)
	if err != nil {
		return nil, err
	}
	defer done(0, &err)

	return p.storage.ListDir(ctx, origvolume, volume, dirPath, count)
}

// Legacy API - does not have any deadlines

		if name == s {
			return alg
		}
	}
	return a
}

func newBitrotWriter(disk StorageAPI, origvolume, volume, filePath string, length int64, algo BitrotAlgorithm, shardSize int64) io.Writer {
	if algo == HighwayHash256S {
		return newStreamingBitrotWriter(disk, origvolume, volume, filePath, length, algo, shardSize)
	}
	return newWholeBitrotWriter(disk, volume, filePath, algo, shardSize)
}

func (s *xlStorage) ListDir(ctx context.Context, origvolume, volume, dirPath string, count int) (entries []string, err error) {
	if contextCanceled(ctx) {
		return nil, ctx.Err()
	}

	if origvolume != "" {
		if !skipAccessChecks(origvolume) {
			origvolumeDir, err := s.getVolDir(origvolume)
			if err != nil {
				return nil, err
			}

}

func (a badDisk) ReadFileStream(ctx context.Context, volume, path string, offset, length int64) (io.ReadCloser, error) {
	return nil, errFaultyDisk
}

func (a badDisk) CreateFile(ctx context.Context, origvolume, volume, path string, size int64, reader io.Reader) error {
	return errFaultyDisk
}

func (badDisk) Hostname() string {
	return ""
}

const oneMiByte = 1 * humanize.MiByte

}

// MetadataHandlerParams is request info for UpdateMetadataHandle and WriteMetadataHandler.
type MetadataHandlerParams struct {
	DiskID     string             `msg:"id"`
	Volume     string             `msg:"v"`
	OrigVolume string             `msg:"ov"`
	FilePath   string             `msg:"fp"`
	UpdateOpts UpdateMetadataOpts `msg:"uo"`
	FI         FileInfo           `msg:"fi"`
}