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_
14 #include <net/fib_rules.h>
17 * struct l3mdev_ops - l3mdev operations
19 * @l3mdev_fib_table: Get FIB table id to use for lookups
21 * @l3mdev_get_rtable: Get cached IPv4 rtable (dst_entry) for device
23 * @l3mdev_get_saddr: Get source address for a flow
25 * @l3mdev_get_rt6_dst: Get cached IPv6 rt6_info (dst_entry) for device
29 u32 (*l3mdev_fib_table)(const struct net_device *dev);
30 struct sk_buff * (*l3mdev_l3_rcv)(struct net_device *dev,
31 struct sk_buff *skb, u16 proto);
34 struct rtable * (*l3mdev_get_rtable)(const struct net_device *dev,
35 const struct flowi4 *fl4);
36 int (*l3mdev_get_saddr)(struct net_device *dev,
40 struct dst_entry * (*l3mdev_get_rt6_dst)(const struct net_device *dev,
41 const struct flowi6 *fl6);
44 #ifdef CONFIG_NET_L3_MASTER_DEV
46 int l3mdev_fib_rule_match(struct net *net, struct flowi *fl,
47 struct fib_lookup_arg *arg);
49 int l3mdev_master_ifindex_rcu(const struct net_device *dev);
50 static inline int l3mdev_master_ifindex(struct net_device *dev)
55 ifindex = l3mdev_master_ifindex_rcu(dev);
61 static inline int l3mdev_master_ifindex_by_index(struct net *net, int ifindex)
63 struct net_device *dev;
66 if (likely(ifindex)) {
69 dev = dev_get_by_index_rcu(net, ifindex);
71 rc = l3mdev_master_ifindex_rcu(dev);
79 /* get index of an interface to use for FIB lookups. For devices
80 * enslaved to an L3 master device FIB lookups are based on the
83 static inline int l3mdev_fib_oif_rcu(struct net_device *dev)
85 return l3mdev_master_ifindex_rcu(dev) ? : dev->ifindex;
88 static inline int l3mdev_fib_oif(struct net_device *dev)
93 oif = l3mdev_fib_oif_rcu(dev);
99 u32 l3mdev_fib_table_rcu(const struct net_device *dev);
100 u32 l3mdev_fib_table_by_index(struct net *net, int ifindex);
101 static inline u32 l3mdev_fib_table(const struct net_device *dev)
106 tb_id = l3mdev_fib_table_rcu(dev);
112 static inline struct rtable *l3mdev_get_rtable(const struct net_device *dev,
113 const struct flowi4 *fl4)
115 if (netif_is_l3_master(dev) && dev->l3mdev_ops->l3mdev_get_rtable)
116 return dev->l3mdev_ops->l3mdev_get_rtable(dev, fl4);
121 static inline bool netif_index_is_l3_master(struct net *net, int ifindex)
123 struct net_device *dev;
131 dev = dev_get_by_index_rcu(net, ifindex);
133 rc = netif_is_l3_master(dev);
140 int l3mdev_get_saddr(struct net *net, int ifindex, struct flowi4 *fl4);
142 struct dst_entry *l3mdev_get_rt6_dst(struct net *net, const struct flowi6 *fl6);
145 struct sk_buff *l3mdev_l3_rcv(struct sk_buff *skb, u16 proto)
147 struct net_device *master = NULL;
149 if (netif_is_l3_slave(skb->dev))
150 master = netdev_master_upper_dev_get_rcu(skb->dev);
151 else if (netif_is_l3_master(skb->dev))
154 if (master && master->l3mdev_ops->l3mdev_l3_rcv)
155 skb = master->l3mdev_ops->l3mdev_l3_rcv(master, skb, proto);
161 struct sk_buff *l3mdev_ip_rcv(struct sk_buff *skb)
163 return l3mdev_l3_rcv(skb, AF_INET);
167 struct sk_buff *l3mdev_ip6_rcv(struct sk_buff *skb)
169 return l3mdev_l3_rcv(skb, AF_INET6);
174 static inline int l3mdev_master_ifindex_rcu(const struct net_device *dev)
178 static inline int l3mdev_master_ifindex(struct net_device *dev)
183 static inline int l3mdev_master_ifindex_by_index(struct net *net, int ifindex)
188 static inline int l3mdev_fib_oif_rcu(struct net_device *dev)
190 return dev ? dev->ifindex : 0;
192 static inline int l3mdev_fib_oif(struct net_device *dev)
194 return dev ? dev->ifindex : 0;
197 static inline u32 l3mdev_fib_table_rcu(const struct net_device *dev)
201 static inline u32 l3mdev_fib_table(const struct net_device *dev)
205 static inline u32 l3mdev_fib_table_by_index(struct net *net, int ifindex)
210 static inline struct rtable *l3mdev_get_rtable(const struct net_device *dev,
211 const struct flowi4 *fl4)
216 static inline bool netif_index_is_l3_master(struct net *net, int ifindex)
221 static inline int l3mdev_get_saddr(struct net *net, int ifindex,
228 struct dst_entry *l3mdev_get_rt6_dst(struct net *net, const struct flowi6 *fl6)
234 struct sk_buff *l3mdev_ip_rcv(struct sk_buff *skb)
240 struct sk_buff *l3mdev_ip6_rcv(struct sk_buff *skb)
246 int l3mdev_fib_rule_match(struct net *net, struct flowi *fl,
247 struct fib_lookup_arg *arg)
253 #endif /* _NET_L3MDEV_H_ */