[SK_BUFF]: Introduce skb_transport_header(skb)

For the places where we need a pointer to the transport header, it is
still legal to touch skb->h.raw directly if just adding to,
subtracting from or setting it to another layer header.

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

1 files changed, 12 insertions, 7 deletions

diff --git a/include/linux/dccp.h b/include/linux/dccp.h
index 1f4df61735f7..fdd4217f1047 100644
--- a/include/linux/dccp.h
+++ b/include/linux/dccp.h
@@ -260,19 +260,20 @@ enum {
 
 static inline struct dccp_hdr *dccp_hdr(const struct sk_buff *skb)
 {
-        return (struct dccp_hdr *)skb->h.raw;
+        return (struct dccp_hdr *)skb_transport_header(skb);
 }
 
 static inline struct dccp_hdr *dccp_zeroed_hdr(struct sk_buff *skb, int headlen)
 {
         skb_push(skb, headlen);
         skb_reset_transport_header(skb);
-        return memset(skb->h.raw, 0, headlen);
+        return memset(skb_transport_header(skb), 0, headlen);
 }
 
 static inline struct dccp_hdr_ext *dccp_hdrx(const struct sk_buff *skb)
 {
-        return (struct dccp_hdr_ext *)(skb->h.raw + sizeof(struct dccp_hdr));
+        return (struct dccp_hdr_ext *)(skb_transport_header(skb) +
+                                       sizeof(struct dccp_hdr));
 }
 
 static inline unsigned int __dccp_basic_hdr_len(const struct dccp_hdr *dh)
@@ -301,12 +302,14 @@ static inline __u64 dccp_hdr_seq(const struct sk_buff *skb)
 
 static inline struct dccp_hdr_request *dccp_hdr_request(struct sk_buff *skb)
 {
-        return (struct dccp_hdr_request *)(skb->h.raw + dccp_basic_hdr_len(skb));
+        return (struct dccp_hdr_request *)(skb_transport_header(skb) +
+                                           dccp_basic_hdr_len(skb));
 }
 
 static inline struct dccp_hdr_ack_bits *dccp_hdr_ack_bits(const struct sk_buff *skb)
 {
-        return (struct dccp_hdr_ack_bits *)(skb->h.raw + dccp_basic_hdr_len(skb));
+        return (struct dccp_hdr_ack_bits *)(skb_transport_header(skb) +
+                                            dccp_basic_hdr_len(skb));
 }
 
 static inline u64 dccp_hdr_ack_seq(const struct sk_buff *skb)
@@ -317,12 +320,14 @@ static inline u64 dccp_hdr_ack_seq(const struct sk_buff *skb)
 
 static inline struct dccp_hdr_response *dccp_hdr_response(struct sk_buff *skb)
 {
-        return (struct dccp_hdr_response *)(skb->h.raw + dccp_basic_hdr_len(skb));
+        return (struct dccp_hdr_response *)(skb_transport_header(skb) +
+                                            dccp_basic_hdr_len(skb));
 }
 
 static inline struct dccp_hdr_reset *dccp_hdr_reset(struct sk_buff *skb)
 {
-        return (struct dccp_hdr_reset *)(skb->h.raw + dccp_basic_hdr_len(skb));
+        return (struct dccp_hdr_reset *)(skb_transport_header(skb) +
+                                         dccp_basic_hdr_len(skb));
 }
 
 static inline unsigned int __dccp_hdr_len(const struct dccp_hdr *dh)