code: public static HardLinkFileInfo loadHardLinkFileInfo(long hardLinkID,
        FSImageLoadingContext context) {  
      // update the latest hard link ID 
      context.getFSDirectory().resetLastHardLinkIDIfLarge(hardLinkID);
    
      // create the hard link file info if necessary  
      HardLinkFileInfo fileInfo = context.getHardLinkFileInfo(hardLinkID);
      if (fileInfo == null) { 
        fileInfo = new HardLinkFileInfo(hardLinkID);
        context.associateHardLinkIDWithFileInfo(hardLinkID, fileInfo);
      }
      return fileInfo;  
    }
docs: Create a HardLink file info if necessary and register to the hardLinkINodeIDToFileInfoMap
  And return the hardLinkFileInfo which is registered in the hardLinkINodeIDToFileInfoMap
  
  This function is not thread safe.
  @param inodeID
  @param context The context when loading the fsImage
  @return hardLinkFileInfo registered in the hardLinkINodeIDToFileInfoMap