closed    bool
}

func (w *fileWriter) Write(p []byte) (int, error) {
	if w.closed {
		return 0, errors.New("zip: write to closed file")
	}
	if w.raw {
		return w.zipw.Write(p)
	}
	w.crc32.Write(p)
	return w.rawCount.Write(p)
}

func (w *fileWriter) close() error {
	if w.closed {
		return errors.New("zip: file closed twice")
	}
	w.closed = true
	if w.raw {

This also means that if something changed it will be **reflected** on the client code automatically. And if you **build** the client it will error out if you have any **mismatch** in the data used.

	}
	if written != 5 {
		t.Errorf("Expected written to be '5', but got %v", written)
	}

	f.Seek(0, io.SeekStart)
	r.Seek(0, io.SeekStart)

	written, err = CopyAligned(f, r, *bufp, r.Size(), f)
	if !errors.Is(err, nil) {
		t.Errorf("Expected nil, but got %v", err)
	}
	if written != r.Size() {
		t.Errorf("Expected written to be '%v', but got %v", r.Size(), written)
	}

	if err := DB.Model(user).Update("Age", 10).Error; err != nil {
		t.Errorf("errors happened when update: %v", err)
	} else if user.Age != 10 {
		t.Errorf("Age should equals to 10, but got %v", user.Age)
	}
	checkUpdatedAtChanged("Update", user.UpdatedAt)
	checkOtherData("Update")

	var result User
	if err := DB.Where("id = ?", user.ID).First(&result).Error; err != nil {
		t.Errorf("errors happened when query: %v", err)
	} else {

	driveTimeoutErrorsMD = NewCounterMD(driveTimeoutErrorsTotal,
		"Total timeout errors on a drive", allDriveLabels...)
	driveIOErrorsMD = NewCounterMD(driveIOErrorsTotal,
		"Total I/O errors on a drive", allDriveLabels...)
	driveAvailabilityErrorsMD = NewCounterMD(driveAvailabilityErrorsTotal,
		"Total availability errors (I/O errors, timeouts) on a drive",
		allDriveLabels...)
	driveWaitingIOMD = NewGaugeMD(driveWaitingIO,

	lockSource := getSource(2)
	start := UTCNow()

	newCtx, cancel := context.WithCancel(ctx)
	if !di.rwMutex.GetRLock(ctx, cancel, di.opsID, lockSource, dsync.Options{
		Timeout:       timeout.Timeout(),
		RetryInterval: timeout.RetryInterval(),
	}) {
		timeout.LogFailure()
		defer cancel()
		if errors.Is(newCtx.Err(), context.Canceled) {

func (d *DummyDataGen) Seek(offset int64, whence int) (int64, error) {
	switch whence {
	case io.SeekStart:
		if offset < 0 {
			return 0, errors.New("Invalid offset")
		}
		d.idx = offset
	case io.SeekCurrent:
		if d.idx+offset < 0 {
			return 0, errors.New("Invalid offset")
		}
		d.idx += offset
	case io.SeekEnd:
		if d.length+offset < 0 {
			return 0, errors.New("Invalid offset")
		}
		d.idx = d.length + offset

	switch r.Code {
	case dsync.RespLockConflict, dsync.RespLockNotFound, dsync.RespOK:
	// no error
	case dsync.RespLockNotInitialized:
		err = errLockNotInitialized
	default:
		err = errors.New(r.Err)
	}
	return ok, err
}

// RLock calls read lock REST API.
func (c *lockRESTClient) RLock(ctx context.Context, args dsync.LockArgs) (reply bool, err error) {
	return c.call(ctx, lockRPCRLock, &args)
}

// Lock calls lock REST API.

	}

	if err := scanner.Err(); err != nil {
		return nil, err
	}

	return result, nil
}

func getDiskUUIDMap() (map[string]string, error) {
	result := make(map[string]string)
	err := filepath.Walk("/dev/disk/by-uuid/",
		func(path string, info os.FileInfo, err error) error {
			if err != nil {
				return err
			}
			realPath, err := filepath.EvalSymlinks(path)
			if err != nil {
				return err
			}

	tcpTimeForFirstByteTotalDur uint64
}{}

// RPCStats holds information about the DHCP/TCP metrics and errors
type RPCStats struct {
	Errs uint64

	DialAvgDuration uint64
	TTFBAvgDuration uint64
	DialErrs        uint64
}

// GetRPCStats returns RPC stats, include calls errors and dhcp/tcp metrics
func GetRPCStats() RPCStats {
	s := RPCStats{
		Errs:     atomic.LoadUint64(&globalStats.errs),