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
);
30 struct rtable
* (*l3mdev_get_rtable
)(const struct net_device
*dev
,
31 const struct flowi4
*fl4
);
32 void (*l3mdev_get_saddr
)(struct net_device
*dev
,
36 struct dst_entry
* (*l3mdev_get_rt6_dst
)(const struct net_device
*dev
,
37 const struct flowi6
*fl6
);
40 #ifdef CONFIG_NET_L3_MASTER_DEV
42 int l3mdev_master_ifindex_rcu(struct net_device
*dev
);
43 static inline int l3mdev_master_ifindex(struct net_device
*dev
)
48 ifindex
= l3mdev_master_ifindex_rcu(dev
);
54 /* get index of an interface to use for FIB lookups. For devices
55 * enslaved to an L3 master device FIB lookups are based on the
58 static inline int l3mdev_fib_oif_rcu(struct net_device
*dev
)
60 return l3mdev_master_ifindex_rcu(dev
) ? : dev
->ifindex
;
63 static inline int l3mdev_fib_oif(struct net_device
*dev
)
68 oif
= l3mdev_fib_oif_rcu(dev
);
74 u32
l3mdev_fib_table_rcu(const struct net_device
*dev
);
75 u32
l3mdev_fib_table_by_index(struct net
*net
, int ifindex
);
76 static inline u32
l3mdev_fib_table(const struct net_device
*dev
)
81 tb_id
= l3mdev_fib_table_rcu(dev
);
87 static inline struct rtable
*l3mdev_get_rtable(const struct net_device
*dev
,
88 const struct flowi4
*fl4
)
90 if (netif_is_l3_master(dev
) && dev
->l3mdev_ops
->l3mdev_get_rtable
)
91 return dev
->l3mdev_ops
->l3mdev_get_rtable(dev
, fl4
);
96 static inline bool netif_index_is_l3_master(struct net
*net
, int ifindex
)
98 struct net_device
*dev
;
106 dev
= dev_get_by_index_rcu(net
, ifindex
);
108 rc
= netif_is_l3_master(dev
);
115 static inline void l3mdev_get_saddr(struct net
*net
, int ifindex
,
118 struct net_device
*dev
;
124 dev
= dev_get_by_index_rcu(net
, ifindex
);
125 if (dev
&& netif_is_l3_master(dev
) &&
126 dev
->l3mdev_ops
->l3mdev_get_saddr
) {
127 dev
->l3mdev_ops
->l3mdev_get_saddr(dev
, fl4
);
134 static inline struct dst_entry
*l3mdev_get_rt6_dst(const struct net_device
*dev
,
135 const struct flowi6
*fl6
)
137 if (netif_is_l3_master(dev
) && dev
->l3mdev_ops
->l3mdev_get_rt6_dst
)
138 return dev
->l3mdev_ops
->l3mdev_get_rt6_dst(dev
, fl6
);
144 struct dst_entry
*l3mdev_rt6_dst_by_oif(struct net
*net
,
145 const struct flowi6
*fl6
)
147 struct dst_entry
*dst
= NULL
;
148 struct net_device
*dev
;
150 dev
= dev_get_by_index(net
, fl6
->flowi6_oif
);
152 dst
= l3mdev_get_rt6_dst(dev
, fl6
);
161 static inline int l3mdev_master_ifindex_rcu(struct net_device
*dev
)
165 static inline int l3mdev_master_ifindex(struct net_device
*dev
)
170 static inline int l3mdev_fib_oif_rcu(struct net_device
*dev
)
172 return dev
? dev
->ifindex
: 0;
174 static inline int l3mdev_fib_oif(struct net_device
*dev
)
176 return dev
? dev
->ifindex
: 0;
179 static inline u32
l3mdev_fib_table_rcu(const struct net_device
*dev
)
183 static inline u32
l3mdev_fib_table(const struct net_device
*dev
)
187 static inline u32
l3mdev_fib_table_by_index(struct net
*net
, int ifindex
)
192 static inline struct rtable
*l3mdev_get_rtable(const struct net_device
*dev
,
193 const struct flowi4
*fl4
)
198 static inline bool netif_index_is_l3_master(struct net
*net
, int ifindex
)
203 static inline void l3mdev_get_saddr(struct net
*net
, int ifindex
,
209 struct dst_entry
*l3mdev_get_rt6_dst(const struct net_device
*dev
,
210 const struct flowi6
*fl6
)
215 struct dst_entry
*l3mdev_rt6_dst_by_oif(struct net
*net
,
216 const struct flowi6
*fl6
)
222 #endif /* _NET_L3MDEV_H_ */