[SK_BUFF]: Introduce skb_network_header_len

For the common sequence "skb->h.raw - skb->nh.raw", similar to skb->mac_len,
that is precalculated tho, don't think we need to bloat skb with one more
member, so just use this new helper, reducing the number of non-skbuff.h
references to the layer headers even more.

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 47c57be97d43..230dd43fc9b3 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -992,6 +992,11 @@ static inline int skb_network_offset(const struct sk_buff *skb)
         return skb->nh.raw - skb->data;
 }
 
+static inline u32 skb_network_header_len(const struct sk_buff *skb)
+{
+        return skb->h.raw - skb->nh.raw;
+}
+
 static inline unsigned char *skb_mac_header(const struct sk_buff *skb)
 {
         return skb->mac.raw;