netdev - [PATCH v2 1/4] sk_buff: introduce pskb_network_may

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Message-Id: <1280933024-12132-1-git-send-email-xiaosuo@gmail.com>
Date:	Wed,  4 Aug 2010 22:43:44 +0800
From:	Changli Gao <xiaosuo@...il.com>
To:	"David S. Miller" <davem@...emloft.net>
Cc:	Jamal Hadi Salim <hadi@...erus.ca>,
	Patrick McHardy <kaber@...sh.net>, netdev@...r.kernel.org,
	Changli Gao <xiaosuo@...il.com>
Subject: [PATCH v2 1/4] sk_buff: introduce pskb_network_may_pull()

Signed-off-by: Changli Gao <xiaosuo@...il.com>
---
 include/linux/skbuff.h |    5 +++++
 1 file changed, 5 insertions(+)
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index d20d9e7..77eb60d 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -1379,6 +1379,11 @@ static inline int skb_network_offset(const struct sk_buff *skb)
 	return skb_network_header(skb) - skb->data;
 }
 
+static inline int pskb_network_may_pull(struct sk_buff *skb, unsigned int len)
+{
+	return pskb_may_pull(skb, skb_network_offset(skb) + len);
+}
+
 /*
  * CPUs often take a performance hit when accessing unaligned memory
  * locations. The actual performance hit varies, it can be small if the
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