gro: Change all receive functions to return GRO result codes

This will allow drivers to adjust their receive path dynamically
based on whether GRO is being applied successfully.

Currently all in-tree callers ignore the return values of these
functions and do not need to be changed.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 18 insertions, 15 deletions

diff --git a/include/linux/if_vlan.h b/include/linux/if_vlan.h
index 71a4870c09a9..153f6b9e722c 100644
--- a/include/linux/if_vlan.h
+++ b/include/linux/if_vlan.h
@@ -120,10 +120,12 @@ extern u16 vlan_dev_vlan_id(const struct net_device *dev);
 extern int __vlan_hwaccel_rx(struct sk_buff *skb, struct vlan_group *grp,
                              u16 vlan_tci, int polling);
 extern int vlan_hwaccel_do_receive(struct sk_buff *skb);
-extern int vlan_gro_receive(struct napi_struct *napi, struct vlan_group *grp,
-                            unsigned int vlan_tci, struct sk_buff *skb);
-extern int vlan_gro_frags(struct napi_struct *napi, struct vlan_group *grp,
-                          unsigned int vlan_tci);
+extern gro_result_t
+vlan_gro_receive(struct napi_struct *napi, struct vlan_group *grp,
+                 unsigned int vlan_tci, struct sk_buff *skb);
+extern gro_result_t
+vlan_gro_frags(struct napi_struct *napi, struct vlan_group *grp,
+               unsigned int vlan_tci);
 
 #else
 static inline struct net_device *vlan_dev_real_dev(const struct net_device *dev)
@@ -150,17 +152,18 @@ static inline int vlan_hwaccel_do_receive(struct sk_buff *skb)
         return 0;
 }
 
-static inline int vlan_gro_receive(struct napi_struct *napi,
-                                   struct vlan_group *grp,
-                                   unsigned int vlan_tci, struct sk_buff *skb)
+static inline gro_result_t
+vlan_gro_receive(struct napi_struct *napi, struct vlan_group *grp,
+                 unsigned int vlan_tci, struct sk_buff *skb)
 {
-        return NET_RX_DROP;
+        return GRO_DROP;
 }
 
-static inline int vlan_gro_frags(struct napi_struct *napi,
-                                 struct vlan_group *grp, unsigned int vlan_tci)
+static inline gro_result_t
+vlan_gro_frags(struct napi_struct *napi, struct vlan_group *grp,
+               unsigned int vlan_tci)
 {
-        return NET_RX_DROP;
+        return GRO_DROP;
 }
 #endif
 
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 6e777efe149e..193b637889f9 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1483,17 +1483,17 @@ extern int		netif_receive_skb(struct sk_buff *skb);
 extern void             napi_gro_flush(struct napi_struct *napi);
 extern gro_result_t     dev_gro_receive(struct napi_struct *napi,
                                         struct sk_buff *skb);
-extern int              napi_skb_finish(gro_result_t ret, struct sk_buff *skb);
-extern int              napi_gro_receive(struct napi_struct *napi,
+extern gro_result_t     napi_skb_finish(gro_result_t ret, struct sk_buff *skb);
+extern gro_result_t     napi_gro_receive(struct napi_struct *napi,
                                          struct sk_buff *skb);
 extern void             napi_reuse_skb(struct napi_struct *napi,
                                        struct sk_buff *skb);
 extern struct sk_buff * napi_get_frags(struct napi_struct *napi);
-extern int              napi_frags_finish(struct napi_struct *napi,
+extern gro_result_t     napi_frags_finish(struct napi_struct *napi,
                                           struct sk_buff *skb,
                                           gro_result_t ret);
 extern struct sk_buff * napi_frags_skb(struct napi_struct *napi);
-extern int              napi_gro_frags(struct napi_struct *napi);
+extern gro_result_t     napi_gro_frags(struct napi_struct *napi);
 
 static inline void napi_free_frags(struct napi_struct *napi)
 {