2 * include/net/l3mdev.h - L3 master device API
3 * Copyright (c) 2015 Cumulus Networks
4 * Copyright (c) 2015 David Ahern <dsa@cumulusnetworks.com>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 #ifndef _NET_L3MDEV_H_
12 #define _NET_L3MDEV_H_
15 * struct l3mdev_ops - l3mdev operations
17 * @l3mdev_fib_table: Get FIB table id to use for lookups
19 * @l3mdev_get_rtable: Get cached IPv4 rtable (dst_entry) for device
21 * @l3mdev_get_saddr: Get source address for a flow
23 * @l3mdev_get_rt6_dst: Get cached IPv6 rt6_info (dst_entry) for device
27 u32 (*l3mdev_fib_table)(const struct net_device *dev);
28 struct sk_buff * (*l3mdev_l3_rcv)(struct net_device *dev,
29 struct sk_buff *skb, u16 proto);
32 struct rtable * (*l3mdev_get_rtable)(const struct net_device *dev,
33 const struct flowi4 *fl4);
34 int (*l3mdev_get_saddr)(struct net_device *dev,
38 struct dst_entry * (*l3mdev_get_rt6_dst)(const struct net_device *dev,
39 const struct flowi6 *fl6);
42 #ifdef CONFIG_NET_L3_MASTER_DEV
44 int l3mdev_master_ifindex_rcu(const struct net_device *dev);
45 static inline int l3mdev_master_ifindex(struct net_device *dev)
50 ifindex = l3mdev_master_ifindex_rcu(dev);
56 static inline int l3mdev_master_ifindex_by_index(struct net *net, int ifindex)
58 struct net_device *dev;
61 if (likely(ifindex)) {
64 dev = dev_get_by_index_rcu(net, ifindex);
66 rc = l3mdev_master_ifindex_rcu(dev);
74 /* get index of an interface to use for FIB lookups. For devices
75 * enslaved to an L3 master device FIB lookups are based on the
78 static inline int l3mdev_fib_oif_rcu(struct net_device *dev)
80 return l3mdev_master_ifindex_rcu(dev) ? : dev->ifindex;
83 static inline int l3mdev_fib_oif(struct net_device *dev)
88 oif = l3mdev_fib_oif_rcu(dev);
94 u32 l3mdev_fib_table_rcu(const struct net_device *dev);
95 u32 l3mdev_fib_table_by_index(struct net *net, int ifindex);
96 static inline u32 l3mdev_fib_table(const struct net_device *dev)
101 tb_id = l3mdev_fib_table_rcu(dev);
107 static inline struct rtable *l3mdev_get_rtable(const struct net_device *dev,
108 const struct flowi4 *fl4)
110 if (netif_is_l3_master(dev) && dev->l3mdev_ops->l3mdev_get_rtable)
111 return dev->l3mdev_ops->l3mdev_get_rtable(dev, fl4);
116 static inline bool netif_index_is_l3_master(struct net *net, int ifindex)
118 struct net_device *dev;
126 dev = dev_get_by_index_rcu(net, ifindex);
128 rc = netif_is_l3_master(dev);
135 int l3mdev_get_saddr(struct net *net, int ifindex, struct flowi4 *fl4);
137 struct dst_entry *l3mdev_get_rt6_dst(struct net *net, const struct flowi6 *fl6);
140 struct sk_buff *l3mdev_l3_rcv(struct sk_buff *skb, u16 proto)
142 struct net_device *master = NULL;
144 if (netif_is_l3_slave(skb->dev))
145 master = netdev_master_upper_dev_get_rcu(skb->dev);
146 else if (netif_is_l3_master(skb->dev))
149 if (master && master->l3mdev_ops->l3mdev_l3_rcv)
150 skb = master->l3mdev_ops->l3mdev_l3_rcv(master, skb, proto);
156 struct sk_buff *l3mdev_ip_rcv(struct sk_buff *skb)
158 return l3mdev_l3_rcv(skb, AF_INET);
162 struct sk_buff *l3mdev_ip6_rcv(struct sk_buff *skb)
164 return l3mdev_l3_rcv(skb, AF_INET6);
169 static inline int l3mdev_master_ifindex_rcu(const struct net_device *dev)
173 static inline int l3mdev_master_ifindex(struct net_device *dev)
178 static inline int l3mdev_master_ifindex_by_index(struct net *net, int ifindex)
183 static inline int l3mdev_fib_oif_rcu(struct net_device *dev)
185 return dev ? dev->ifindex : 0;
187 static inline int l3mdev_fib_oif(struct net_device *dev)
189 return dev ? dev->ifindex : 0;
192 static inline u32 l3mdev_fib_table_rcu(const struct net_device *dev)
196 static inline u32 l3mdev_fib_table(const struct net_device *dev)
200 static inline u32 l3mdev_fib_table_by_index(struct net *net, int ifindex)
205 static inline struct rtable *l3mdev_get_rtable(const struct net_device *dev,
206 const struct flowi4 *fl4)
211 static inline bool netif_index_is_l3_master(struct net *net, int ifindex)
216 static inline int l3mdev_get_saddr(struct net *net, int ifindex,
223 struct dst_entry *l3mdev_get_rt6_dst(struct net *net, const struct flowi6 *fl6)
229 struct sk_buff *l3mdev_ip_rcv(struct sk_buff *skb)
235 struct sk_buff *l3mdev_ip6_rcv(struct sk_buff *skb)
241 #endif /* _NET_L3MDEV_H_ */