net: Add generic packet offload infrastructure.

Create a new data structure to contain the GRO/GSO callbacks and add
a new registration mechanism.

Singed-off-by: Vlad Yasevich <vyasevic@redhat.com>

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 14 insertions, 0 deletions

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 7bf867c97043..d45a58db4ba3 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1521,6 +1521,17 @@ struct packet_type {
         struct list_head        list;
 };
 
+struct packet_offload {
+        __be16                  type;   /* This is really htons(ether_type). */
+        struct sk_buff          *(*gso_segment)(struct sk_buff *skb,
+                                                netdev_features_t features);
+        int                     (*gso_send_check)(struct sk_buff *skb);
+        struct sk_buff          **(*gro_receive)(struct sk_buff **head,
+                                               struct sk_buff *skb);
+        int                     (*gro_complete)(struct sk_buff *skb);
+        struct list_head        list;
+};
+
 #include <linux/notifier.h>
 
 /* netdevice notifier chain. Please remember to update the rtnetlink
@@ -1615,6 +1626,9 @@ extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short
 extern void             dev_add_pack(struct packet_type *pt);
 extern void             dev_remove_pack(struct packet_type *pt);
 extern void             __dev_remove_pack(struct packet_type *pt);
+extern void             dev_add_offload(struct packet_offload *po);
+extern void             dev_remove_offload(struct packet_offload *po);
+extern void             __dev_remove_offload(struct packet_offload *po);
 
 extern struct net_device        *dev_get_by_flags_rcu(struct net *net, unsigned short flags,
                                                       unsigned short mask);