tcp: must unclone packets before mangling them

[pandora-kernel.git] / include / linux / skbuff.h

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index efe50af..6978936 100644 (file)
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -737,6 +737,16 @@ static inline int skb_cloned(const struct sk_buff *skb)
               (atomic_read(&skb_shinfo(skb)->dataref) & SKB_DATAREF_MASK) != 1;
 }
 
               (atomic_read(&skb_shinfo(skb)->dataref) & SKB_DATAREF_MASK) != 1;
 }
 

+static inline int skb_unclone(struct sk_buff *skb, gfp_t pri)
+{
+       might_sleep_if(pri & __GFP_WAIT);
+
+       if (skb_cloned(skb))
+               return pskb_expand_head(skb, 0, 0, pri);
+
+       return 0;
+}
+

 /**
  *     skb_header_cloned - is the header a clone
  *     @skb: buffer to check
 /**
  *     skb_header_cloned - is the header a clone
  *     @skb: buffer to check