An sk_buff contains packet data and also state data that cover multiple layers of the protocol stack.
sk_buff中包含了报文数据,以及涉及协议栈中多个层次的状态数据。
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All right. The rules, though, are, they can only move one disk at a time, and they can never cover up a smaller disk with a larger disk. OK. Otherwise you'd just move the whole darn stack, OK?