ipvlan: misc changes

1. scope correction for few functions that are used in single file.
2. Adjust variables that are used in fast-path to fit into single cacheline
3. Update rcv_frame() to skip shared check for frames coming over wire

Signed-off-by: Mahesh Bandewar <maheshb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ipvlan/ipvlan.h b/drivers/net/ipvlan/ipvlan.h
index 817cab1..695a5dc 100644 (file)
--- a/drivers/net/ipvlan/ipvlan.h
+++ b/drivers/net/ipvlan/ipvlan.h
@@ -84,19 +84,19 @@ struct ipvl_addr {
 #define ip4addr ipu.ip4
        struct hlist_node       hlnode;  /* Hash-table linkage */
        struct list_head        anode;   /* logical-interface linkage */
-       struct rcu_head         rcu;
        ipvl_hdr_type           atype;
+       struct rcu_head         rcu;
 };
 
 struct ipvl_port {
        struct net_device       *dev;
        struct hlist_head       hlhead[IPVLAN_HASH_SIZE];
        struct list_head        ipvlans;
-       struct rcu_head         rcu;
+       u16                     mode;
        struct work_struct      wq;
        struct sk_buff_head     backlog;
        int                     count;
-       u16                     mode;
+       struct rcu_head         rcu;
 };
 
 static inline struct ipvl_port *ipvlan_port_get_rcu(const struct net_device *d)
@@ -114,7 +114,6 @@ static inline struct ipvl_port *ipvlan_port_get_rtnl(const struct net_device *d)
        return rtnl_dereference(d->rx_handler_data);
 }
 
-void ipvlan_adjust_mtu(struct ipvl_dev *ipvlan, struct net_device *dev);
 void ipvlan_init_secret(void);
 unsigned int ipvlan_mac_hash(const unsigned char *addr);
 rx_handler_result_t ipvlan_handle_frame(struct sk_buff **pskb);
@@ -124,7 +123,5 @@ void ipvlan_ht_addr_add(struct ipvl_dev *ipvlan, struct ipvl_addr *addr);
 struct ipvl_addr *ipvlan_find_addr(const struct ipvl_dev *ipvlan,
                                   const void *iaddr, bool is_v6);
 bool ipvlan_addr_busy(struct ipvl_port *port, void *iaddr, bool is_v6);
-struct ipvl_addr *ipvlan_ht_addr_lookup(const struct ipvl_port *port,
-                                       const void *iaddr, bool is_v6);
 void ipvlan_ht_addr_del(struct ipvl_addr *addr);
 #endif /* __IPVLAN_H */

diff --git a/drivers/net/ipvlan/ipvlan_core.c b/drivers/net/ipvlan/ipvlan_core.c
index 4e60c6b..d6d0524 100644 (file)
--- a/drivers/net/ipvlan/ipvlan_core.c
+++ b/drivers/net/ipvlan/ipvlan_core.c
@@ -53,8 +53,8 @@ static u8 ipvlan_get_v4_hash(const void *iaddr)
               IPVLAN_HASH_MASK;
 }
 
-struct ipvl_addr *ipvlan_ht_addr_lookup(const struct ipvl_port *port,
-                                       const void *iaddr, bool is_v6)
+static struct ipvl_addr *ipvlan_ht_addr_lookup(const struct ipvl_port *port,
+                                              const void *iaddr, bool is_v6)
 {
        struct ipvl_addr *addr;
        u8 hash;
@@ -265,20 +265,25 @@ static int ipvlan_rcv_frame(struct ipvl_addr *addr, struct sk_buff **pskb,
        struct sk_buff *skb = *pskb;
 
        len = skb->len + ETH_HLEN;
-       if (unlikely(!(dev->flags & IFF_UP))) {
-               kfree_skb(skb);
-               goto out;
-       }
+       /* Only packets exchanged between two local slaves need to have
+        * device-up check as well as skb-share check.
+        */
+       if (local) {
+               if (unlikely(!(dev->flags & IFF_UP))) {
+                       kfree_skb(skb);
+                       goto out;
+               }
 
-       skb = skb_share_check(skb, GFP_ATOMIC);
-       if (!skb)
-               goto out;
+               skb = skb_share_check(skb, GFP_ATOMIC);
+               if (!skb)
+                       goto out;
 
-       *pskb = skb;
+               *pskb = skb;
+       }
        skb->dev = dev;
-       skb->pkt_type = PACKET_HOST;
 
        if (local) {
+               skb->pkt_type = PACKET_HOST;
                if (dev_forward_skb(ipvlan->dev, skb) == NET_RX_SUCCESS)
                        success = true;
        } else {

diff --git a/drivers/net/ipvlan/ipvlan_main.c b/drivers/net/ipvlan/ipvlan_main.c
index 5bcb852..a7ca1c5 100644 (file)
--- a/drivers/net/ipvlan/ipvlan_main.c
+++ b/drivers/net/ipvlan/ipvlan_main.c
@@ -9,7 +9,7 @@
 
 #include "ipvlan.h"
 
-void ipvlan_adjust_mtu(struct ipvl_dev *ipvlan, struct net_device *dev)
+static void ipvlan_adjust_mtu(struct ipvl_dev *ipvlan, struct net_device *dev)
 {
        ipvlan->dev->mtu = dev->mtu - ipvlan->mtu_adj;
 }