net: Add skb_queue_next(). (249c8b42) · Commits · 戴 / test

A lot of code wants to iterate over an SKB queue at the top level using it's own control structure and iterator scheme. Provide skb_queue_next(), which is only valid to invoke if skb_queue_is_last() returns false. Signed-off-by:

David S. Miller <davem@davemloft.net>

include/linux/skbuff.h

+18 −0

Original line number	Diff line number	Diff line
		@@ -485,6 +485,24 @@ static inline bool skb_queue_is_last(const struct sk_buff_head *list,
		return (skb->next == (struct sk_buff *) list);
		}

		/**
		* skb_queue_next - return the next packet in the queue
		* @list: queue head
		* @skb: current buffer
		*
		* Return the next packet in @list after @skb. It is only valid to
		* call this if skb_queue_is_last() evaluates to false.
		*/
		static inline struct sk_buff skb_queue_next(const struct sk_buff_head list,
		const struct sk_buff *skb)
		{
		/* This BUG_ON may seem severe, but if we just return then we
		* are going to dereference garbage.
		*/
		BUG_ON(skb_queue_is_last(list, skb));
		return skb->next;
		}

		/**
		* skb_get - reference buffer
		* @skb: buffer to reference

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