[计] full file protection functionality

quán wén jiàn bǎo hù gōng néng xìng ㄑㄩㄢˊ ㄨㄣˊ ㄐㄧㄢˋ ㄅㄠˇ ㄏㄨˋ ㄍㄨㄥ ㄋㄥˊ ㄒㄧㄥˋ