net: Add net protocol offload registration infrustructure
Create a new data structure for IPv4 protocols that holds GRO/GSO
callbacks and a new array to track the protocols that register GRO/GSO.
Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/protocol.h b/include/net/protocol.h
index 929528c..d8ecb17 100644
--- a/include/net/protocol.h
+++ b/include/net/protocol.h
@@ -77,6 +77,15 @@
#define INET6_PROTO_GSO_EXTHDR 0x4
#endif
+struct net_offload {
+ int (*gso_send_check)(struct sk_buff *skb);
+ struct sk_buff *(*gso_segment)(struct sk_buff *skb,
+ netdev_features_t features);
+ struct sk_buff **(*gro_receive)(struct sk_buff **head,
+ struct sk_buff *skb);
+ int (*gro_complete)(struct sk_buff *skb);
+};
+
/* This is used to register socket interfaces for IP protocols. */
struct inet_protosw {
struct list_head list;
@@ -96,6 +105,7 @@
#define INET_PROTOSW_ICSK 0x04 /* Is this an inet_connection_sock? */
extern const struct net_protocol __rcu *inet_protos[MAX_INET_PROTOS];
+extern const struct net_offload __rcu *inet_offloads[MAX_INET_PROTOS];
#if IS_ENABLED(CONFIG_IPV6)
extern const struct inet6_protocol __rcu *inet6_protos[MAX_INET_PROTOS];
@@ -103,6 +113,8 @@
extern int inet_add_protocol(const struct net_protocol *prot, unsigned char num);
extern int inet_del_protocol(const struct net_protocol *prot, unsigned char num);
+extern int inet_add_offload(const struct net_offload *prot, unsigned char num);
+extern int inet_del_offload(const struct net_offload *prot, unsigned char num);
extern void inet_register_protosw(struct inet_protosw *p);
extern void inet_unregister_protosw(struct inet_protosw *p);