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skb: Add skb_peek_next helper

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Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pavel Emelyanov
2012-02-21 07:31:18 +00:00
committed by David S. Miller
parent 3f518bf745
commit da5ef6e51b
1 changed files with 18 additions and 0 deletions
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18
include/linux/skbuff.h
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@@ -876,6 +876,24 @@ static inline struct sk_buff *skb_peek(const struct sk_buff_head *list_)
return list; return list;
} }
/**
* skb_peek_next - peek skb following the given one from a queue
* @skb: skb to start from
* @list_: list to peek at
*
* Returns %NULL when the end of the list is met or a pointer to the
* next element. The reference count is not incremented and the
* reference is therefore volatile. Use with caution.
*/
static inline struct sk_buff *skb_peek_next(struct sk_buff *skb,
const struct sk_buff_head *list_)
{
struct sk_buff *next = skb->next;
if (next == (struct sk_buff *)list_)
next = NULL;
return next;
}
/** /**
* skb_peek_tail - peek at the tail of an &sk_buff_head * skb_peek_tail - peek at the tail of an &sk_buff_head
* @list_: list to peek at * @list_: list to peek at