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
25 u32 (*l3mdev_fib_table)(const struct net_device *dev);
26 struct rtable * (*l3mdev_get_rtable)(const struct net_device *dev,
27 const struct flowi4 *fl4);
28 void (*l3mdev_get_saddr)(struct net_device *dev,
32 #ifdef CONFIG_NET_L3_MASTER_DEV
34 int l3mdev_master_ifindex_rcu(struct net_device *dev);
35 static inline int l3mdev_master_ifindex(struct net_device *dev)
40 ifindex = l3mdev_master_ifindex_rcu(dev);
46 /* get index of an interface to use for FIB lookups. For devices
47 * enslaved to an L3 master device FIB lookups are based on the
50 static inline int l3mdev_fib_oif_rcu(struct net_device *dev)
52 return l3mdev_master_ifindex_rcu(dev) ? : dev->ifindex;
55 static inline int l3mdev_fib_oif(struct net_device *dev)
60 oif = l3mdev_fib_oif_rcu(dev);
66 u32 l3mdev_fib_table_rcu(const struct net_device *dev);
67 u32 l3mdev_fib_table_by_index(struct net *net, int ifindex);
68 static inline u32 l3mdev_fib_table(const struct net_device *dev)
73 tb_id = l3mdev_fib_table_rcu(dev);
79 static inline struct rtable *l3mdev_get_rtable(const struct net_device *dev,
80 const struct flowi4 *fl4)
82 if (netif_is_l3_master(dev) && dev->l3mdev_ops->l3mdev_get_rtable)
83 return dev->l3mdev_ops->l3mdev_get_rtable(dev, fl4);
88 static inline bool netif_index_is_l3_master(struct net *net, int ifindex)
90 struct net_device *dev;
98 dev = dev_get_by_index_rcu(net, ifindex);
100 rc = netif_is_l3_master(dev);
107 static inline void l3mdev_get_saddr(struct net *net, int ifindex,
110 struct net_device *dev;
116 dev = dev_get_by_index_rcu(net, ifindex);
117 if (dev && netif_is_l3_master(dev) &&
118 dev->l3mdev_ops->l3mdev_get_saddr) {
119 dev->l3mdev_ops->l3mdev_get_saddr(dev, fl4);
128 static inline int l3mdev_master_ifindex_rcu(struct net_device *dev)
132 static inline int l3mdev_master_ifindex(struct net_device *dev)
137 static inline int l3mdev_fib_oif_rcu(struct net_device *dev)
139 return dev ? dev->ifindex : 0;
141 static inline int l3mdev_fib_oif(struct net_device *dev)
143 return dev ? dev->ifindex : 0;
146 static inline u32 l3mdev_fib_table_rcu(const struct net_device *dev)
150 static inline u32 l3mdev_fib_table(const struct net_device *dev)
154 static inline u32 l3mdev_fib_table_by_index(struct net *net, int ifindex)
159 static inline struct rtable *l3mdev_get_rtable(const struct net_device *dev,
160 const struct flowi4 *fl4)
165 static inline bool netif_index_is_l3_master(struct net *net, int ifindex)
170 static inline void l3mdev_get_saddr(struct net *net, int ifindex,
176 #endif /* _NET_L3MDEV_H_ */