X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=blobdiff_plain;f=include%2Flinux%2Fskbuff.h;h=acf17af45af99055a289897bf6f9612e521ac6d4;hp=a01b6f84e3bcbc710565ff87b5e28bf7e1cc8e8f;hb=832d11c5cd076ab;hpb=f58b22fd3c16444edc393a217a74208f1894b601

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index a01b6f84e3bc..acf17af45af9 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -492,6 +492,19 @@ static inline bool skb_queue_is_last(const struct sk_buff_head *list,
 	return (skb->next == (struct sk_buff *) list);
 }
 
+/**
+ *	skb_queue_is_first - check if skb is the first entry in the queue
+ *	@list: queue head
+ *	@skb: buffer
+ *
+ *	Returns true if @skb is the first buffer on the list.
+ */
+static inline bool skb_queue_is_first(const struct sk_buff_head *list,
+				      const struct sk_buff *skb)
+{
+	return (skb->prev == (struct sk_buff *) list);
+}
+
 /**
  *	skb_queue_next - return the next packet in the queue
  *	@list: queue head
@@ -510,6 +523,24 @@ static inline struct sk_buff *skb_queue_next(const struct sk_buff_head *list,
 	return skb->next;
 }
 
+/**
+ *	skb_queue_prev - return the prev packet in the queue
+ *	@list: queue head
+ *	@skb: current buffer
+ *
+ *	Return the prev packet in @list before @skb.  It is only valid to
+ *	call this if skb_queue_is_first() evaluates to false.
+ */
+static inline struct sk_buff *skb_queue_prev(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_first(list, skb));
+	return skb->prev;
+}
+
 /**
  *	skb_get - reference buffer
  *	@skb: buffer to reference
@@ -1652,6 +1683,8 @@ extern int             skb_splice_bits(struct sk_buff *skb,
 extern void	       skb_copy_and_csum_dev(const struct sk_buff *skb, u8 *to);
 extern void	       skb_split(struct sk_buff *skb,
 				 struct sk_buff *skb1, const u32 len);
+extern int	       skb_shift(struct sk_buff *tgt, struct sk_buff *skb,
+				 int shiftlen);
 
 extern struct sk_buff *skb_segment(struct sk_buff *skb, int features);