net: l3mdev: Add hook to output path

[cascardo/linux.git] / include / net / l3mdev.h

diff --git a/include/net/l3mdev.h b/include/net/l3mdev.h
index 81e175e..53d5274 100644 (file)
--- a/include/net/l3mdev.h
+++ b/include/net/l3mdev.h
@@ -11,6 +11,7 @@
 #ifndef _NET_L3MDEV_H_
 #define _NET_L3MDEV_H_
 
+#include <net/dst.h>
 #include <net/fib_rules.h>
 
 /**
@@ -18,6 +19,10 @@
  *
  * @l3mdev_fib_table: Get FIB table id to use for lookups
  *
+ * @l3mdev_l3_rcv:    Hook in L3 receive path
+ *
+ * @l3mdev_l3_out:    Hook in L3 output path
+ *
  * @l3mdev_get_rtable: Get cached IPv4 rtable (dst_entry) for device
  *
  * @l3mdev_get_saddr: Get source address for a flow
@@ -29,6 +34,9 @@ struct l3mdev_ops {
        u32             (*l3mdev_fib_table)(const struct net_device *dev);
        struct sk_buff * (*l3mdev_l3_rcv)(struct net_device *dev,
                                          struct sk_buff *skb, u16 proto);
+       struct sk_buff * (*l3mdev_l3_out)(struct net_device *dev,
+                                         struct sock *sk, struct sk_buff *skb,
+                                         u16 proto);
 
        /* IPv4 ops */
        struct rtable * (*l3mdev_get_rtable)(const struct net_device *dev,
@@ -201,6 +209,34 @@ struct sk_buff *l3mdev_ip6_rcv(struct sk_buff *skb)
        return l3mdev_l3_rcv(skb, AF_INET6);
 }
 
+static inline
+struct sk_buff *l3mdev_l3_out(struct sock *sk, struct sk_buff *skb, u16 proto)
+{
+       struct net_device *dev = skb_dst(skb)->dev;
+
+       if (netif_is_l3_slave(dev)) {
+               struct net_device *master;
+
+               master = netdev_master_upper_dev_get_rcu(dev);
+               if (master && master->l3mdev_ops->l3mdev_l3_out)
+                       skb = master->l3mdev_ops->l3mdev_l3_out(master, sk,
+                                                               skb, proto);
+       }
+
+       return skb;
+}
+
+static inline
+struct sk_buff *l3mdev_ip_out(struct sock *sk, struct sk_buff *skb)
+{
+       return l3mdev_l3_out(sk, skb, AF_INET);
+}
+
+static inline
+struct sk_buff *l3mdev_ip6_out(struct sock *sk, struct sk_buff *skb)
+{
+       return l3mdev_l3_out(sk, skb, AF_INET6);
+}
 #else
 
 static inline int l3mdev_master_ifindex_rcu(const struct net_device *dev)
@@ -286,6 +322,18 @@ struct sk_buff *l3mdev_ip6_rcv(struct sk_buff *skb)
        return skb;
 }
 
+static inline
+struct sk_buff *l3mdev_ip_out(struct sock *sk, struct sk_buff *skb)
+{
+       return skb;
+}
+
+static inline
+struct sk_buff *l3mdev_ip6_out(struct sock *sk, struct sk_buff *skb)
+{
+       return skb;
+}
+
 static inline
 int l3mdev_fib_rule_match(struct net *net, struct flowi *fl,
                          struct fib_lookup_arg *arg)