[SK_BUFF]: Introduce skb_network_offset()

For the quite common 'skb->nh.raw - skb->data' sequence.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 0 deletions

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 6440c78fe625..47cc8b07c2b4 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -965,6 +965,11 @@ static inline void skb_reset_network_header(struct sk_buff *skb)
         skb->nh.raw = skb->data;
 }
 
+static inline int skb_network_offset(const struct sk_buff *skb)
+{
+        return skb->nh.raw - skb->data;
+}
+
 static inline unsigned char *skb_mac_header(const struct sk_buff *skb)
 {
         return skb->mac.raw;