From 249c8b42c7e5e6f33d0ff983041f08278b137e53 Mon Sep 17 00:00:00 2001
From: "David S. Miller" <davem@davemloft.net>
Date: Tue, 23 Sep 2008 00:44:42 -0700
Subject: [PATCH] net: Add skb_queue_next().
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 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 3a5838da160eb..d2f1778877d74 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -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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