tunneling: Capture inner mac header during encapsulation.

[cascardo/linux.git] / include / linux / skbuff.h

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 821c7f4..d7f96ff 100644 (file)
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -387,6 +387,7 @@ typedef unsigned char *sk_buff_data_t;
  *     @vlan_tci: vlan tag control information
  *     @inner_transport_header: Inner transport layer header (encapsulation)
  *     @inner_network_header: Network layer header (encapsulation)
+ *     @inner_mac_header: Link layer header (encapsulation)
  *     @transport_header: Transport layer header
  *     @network_header: Network layer header
  *     @mac_header: Link layer header
@@ -505,6 +506,7 @@ struct sk_buff {
 
        sk_buff_data_t          inner_transport_header;
        sk_buff_data_t          inner_network_header;
+       sk_buff_data_t          inner_mac_header;
        sk_buff_data_t          transport_header;
        sk_buff_data_t          network_header;
        sk_buff_data_t          mac_header;
@@ -1466,6 +1468,7 @@ static inline void skb_reserve(struct sk_buff *skb, int len)
 
 static inline void skb_reset_inner_headers(struct sk_buff *skb)
 {
+       skb->inner_mac_header = skb->mac_header;
        skb->inner_network_header = skb->network_header;
        skb->inner_transport_header = skb->transport_header;
 }
@@ -1511,6 +1514,22 @@ static inline void skb_set_inner_network_header(struct sk_buff *skb,
        skb->inner_network_header += offset;
 }
 
+static inline unsigned char *skb_inner_mac_header(const struct sk_buff *skb)
+{
+       return skb->head + skb->inner_mac_header;
+}
+
+static inline void skb_reset_inner_mac_header(struct sk_buff *skb)
+{
+       skb->inner_mac_header = skb->data - skb->head;
+}
+
+static inline void skb_set_inner_mac_header(struct sk_buff *skb,
+                                           const int offset)
+{
+       skb_reset_inner_mac_header(skb);
+       skb->inner_mac_header += offset;
+}
 static inline bool skb_transport_header_was_set(const struct sk_buff *skb)
 {
        return skb->transport_header != ~0U;
@@ -1604,6 +1623,21 @@ static inline void skb_set_inner_network_header(struct sk_buff *skb,
        skb->inner_network_header = skb->data + offset;
 }
 
+static inline unsigned char *skb_inner_mac_header(const struct sk_buff *skb)
+{
+       return skb->inner_mac_header;
+}
+
+static inline void skb_reset_inner_mac_header(struct sk_buff *skb)
+{
+       skb->inner_mac_header = skb->data;
+}
+
+static inline void skb_set_inner_mac_header(struct sk_buff *skb,
+                                               const int offset)
+{
+       skb->inner_mac_header = skb->data + offset;
+}
 static inline bool skb_transport_header_was_set(const struct sk_buff *skb)
 {
        return skb->transport_header != NULL;