return res, err
	}

	if err = checkPathLength(dstFilePath); err != nil {
		return res, err
	}

	s.RLock()
	formatLegacy := s.formatLegacy
	s.RUnlock()

	dstBuf, err := xioutil.ReadFile(dstFilePath)
	if err != nil {
		// handle situations when dstFilePath is 'file'
		// for example such as someone is trying to

	SrcFilePath string `msg:"sp"`
	DstVolume   string `msg:"dv"`
	DstFilePath string `msg:"dp"`
}

// RenamePartHandlerParams are parameters for RenamePartHandler.
type RenamePartHandlerParams struct {
	DiskID      string `msg:"id"`
	SrcVolume   string `msg:"sv"`
	SrcFilePath string `msg:"sp"`
	DstVolume   string `msg:"dv"`
	DstFilePath string `msg:"dp"`
	Meta        []byte `msg:"m"`
	SkipParent  string `msg:"kp"`

	_, err = storageRenamePartRPC.Call(ctx, client.gridConn, &RenamePartHandlerParams{
		DiskID:      *client.diskID.Load(),
		SrcVolume:   srcVolume,
		SrcFilePath: srcPath,
		DstVolume:   dstVolume,
		DstFilePath: dstPath,
		Meta:        meta,
		SkipParent:  skipParent,
	})
	return toStorageErr(err)
}

		case "dv":
			z.DstVolume, err = dc.ReadString()
			if err != nil {
				err = msgp.WrapError(err, "DstVolume")
				return
			}
		case "dp":
			z.DstFilePath, err = dc.ReadString()
			if err != nil {
				err = msgp.WrapError(err, "DstFilePath")
				return
			}
		default:
			err = dc.Skip()
			if err != nil {
				err = msgp.WrapError(err)
				return
			}
		}
	}
	return