netfilter: bridge: nf_bridge_copy_header as static inline in header

Move nf_bridge_copy_header() as static inline in netfilter_bridge.h
header file. This patch prepares the modularization of the br_netfilter
code.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

include/linux/netfilter_bridge.h

@@ -24,16 +24,6 @@ enum nf_br_hook_priorities {
 #define BRNF_8021Q			0x10
 #define BRNF_PPPoE			0x20
 
-/* Only used in br_forward.c */
-int nf_bridge_copy_header(struct sk_buff *skb);
-static inline int nf_bridge_maybe_copy_header(struct sk_buff *skb)
-{
-	if (skb->nf_bridge &&
-	    skb->nf_bridge->mask & (BRNF_BRIDGED | BRNF_BRIDGED_DNAT))
-		return nf_bridge_copy_header(skb);
-  	return 0;
-}
-
 static inline unsigned int nf_bridge_encap_header_len(const struct sk_buff *skb)
 {
 	switch (skb->protocol) {
@@ -46,6 +36,44 @@ static inline unsigned int nf_bridge_encap_header_len(const struct sk_buff *skb)
 	}
 }
 
+static inline void nf_bridge_update_protocol(struct sk_buff *skb)
+{
+	if (skb->nf_bridge->mask & BRNF_8021Q)
+		skb->protocol = htons(ETH_P_8021Q);
+	else if (skb->nf_bridge->mask & BRNF_PPPoE)
+		skb->protocol = htons(ETH_P_PPP_SES);
+}
+
+/* Fill in the header for fragmented IP packets handled by
+ * the IPv4 connection tracking code.
+ *
+ * Only used in br_forward.c
+ */
+static inline int nf_bridge_copy_header(struct sk_buff *skb)
+{
+	int err;
+	unsigned int header_size;
+
+	nf_bridge_update_protocol(skb);
+	header_size = ETH_HLEN + nf_bridge_encap_header_len(skb);
+	err = skb_cow_head(skb, header_size);
+	if (err)
+		return err;
+
+	skb_copy_to_linear_data_offset(skb, -header_size,
+				       skb->nf_bridge->data, header_size);
+	__skb_push(skb, nf_bridge_encap_header_len(skb));
+	return 0;
+}
+
+static inline int nf_bridge_maybe_copy_header(struct sk_buff *skb)
+{
+	if (skb->nf_bridge &&
+	    skb->nf_bridge->mask & (BRNF_BRIDGED | BRNF_BRIDGED_DNAT))
+		return nf_bridge_copy_header(skb);
+  	return 0;
+}
+
 static inline unsigned int nf_bridge_mtu_reduction(const struct sk_buff *skb)
 {
 	if (unlikely(skb->nf_bridge->mask & BRNF_PPPoE))

net/bridge/br_netfilter.c

@@ -245,14 +245,6 @@ static inline void nf_bridge_save_header(struct sk_buff *skb)
 					 skb->nf_bridge->data, header_size);
 }
 
-static inline void nf_bridge_update_protocol(struct sk_buff *skb)
-{
-	if (skb->nf_bridge->mask & BRNF_8021Q)
-		skb->protocol = htons(ETH_P_8021Q);
-	else if (skb->nf_bridge->mask & BRNF_PPPoE)
-		skb->protocol = htons(ETH_P_PPP_SES);
-}
-
 /* When handing a packet over to the IP layer
  * check whether we have a skb that is in the
  * expected format
@@ -320,26 +312,6 @@ static int br_parse_ip_options(struct sk_buff *skb)
 	return -1;
 }
 
-/* Fill in the header for fragmented IP packets handled by
- * the IPv4 connection tracking code.
- */
-int nf_bridge_copy_header(struct sk_buff *skb)
-{
-	int err;
-	unsigned int header_size;
-
-	nf_bridge_update_protocol(skb);
-	header_size = ETH_HLEN + nf_bridge_encap_header_len(skb);
-	err = skb_cow_head(skb, header_size);
-	if (err)
-		return err;
-
-	skb_copy_to_linear_data_offset(skb, -header_size,
-				       skb->nf_bridge->data, header_size);
-	__skb_push(skb, nf_bridge_encap_header_len(skb));
-	return 0;
-}
-
 /* PF_BRIDGE/PRE_ROUTING *********************************************/
 /* Undo the changes made for ip6tables PREROUTING and continue the
  * bridge PRE_ROUTING hook. */