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
,
42 int (*l3mdev_get_saddr6
)(struct net_device
*dev
,
43 const struct sock
*sk
,
47 #ifdef CONFIG_NET_L3_MASTER_DEV
49 int l3mdev_fib_rule_match(struct net
*net
, struct flowi
*fl
,
50 struct fib_lookup_arg
*arg
);
52 int l3mdev_master_ifindex_rcu(const struct net_device
*dev
);
53 static inline int l3mdev_master_ifindex(struct net_device
*dev
)
58 ifindex
= l3mdev_master_ifindex_rcu(dev
);
64 static inline int l3mdev_master_ifindex_by_index(struct net
*net
, int ifindex
)
66 struct net_device
*dev
;
69 if (likely(ifindex
)) {
72 dev
= dev_get_by_index_rcu(net
, ifindex
);
74 rc
= l3mdev_master_ifindex_rcu(dev
);
83 const struct net_device
*l3mdev_master_dev_rcu(const struct net_device
*_dev
)
85 /* netdev_master_upper_dev_get_rcu calls
86 * list_first_or_null_rcu to walk the upper dev list.
87 * list_first_or_null_rcu does not handle a const arg. We aren't
88 * making changes, just want the master device from that list so
89 * typecast to remove the const
91 struct net_device
*dev
= (struct net_device
*)_dev
;
92 const struct net_device
*master
;
97 if (netif_is_l3_master(dev
))
99 else if (netif_is_l3_slave(dev
))
100 master
= netdev_master_upper_dev_get_rcu(dev
);
107 /* get index of an interface to use for FIB lookups. For devices
108 * enslaved to an L3 master device FIB lookups are based on the
111 static inline int l3mdev_fib_oif_rcu(struct net_device
*dev
)
113 return l3mdev_master_ifindex_rcu(dev
) ? : dev
->ifindex
;
116 static inline int l3mdev_fib_oif(struct net_device
*dev
)
121 oif
= l3mdev_fib_oif_rcu(dev
);
127 u32
l3mdev_fib_table_rcu(const struct net_device
*dev
);
128 u32
l3mdev_fib_table_by_index(struct net
*net
, int ifindex
);
129 static inline u32
l3mdev_fib_table(const struct net_device
*dev
)
134 tb_id
= l3mdev_fib_table_rcu(dev
);
140 static inline struct rtable
*l3mdev_get_rtable(const struct net_device
*dev
,
141 const struct flowi4
*fl4
)
143 if (netif_is_l3_master(dev
) && dev
->l3mdev_ops
->l3mdev_get_rtable
)
144 return dev
->l3mdev_ops
->l3mdev_get_rtable(dev
, fl4
);
149 static inline bool netif_index_is_l3_master(struct net
*net
, int ifindex
)
151 struct net_device
*dev
;
159 dev
= dev_get_by_index_rcu(net
, ifindex
);
161 rc
= netif_is_l3_master(dev
);
168 int l3mdev_get_saddr(struct net
*net
, int ifindex
, struct flowi4
*fl4
);
170 struct dst_entry
*l3mdev_get_rt6_dst(struct net
*net
, struct flowi6
*fl6
);
171 int l3mdev_get_saddr6(struct net
*net
, const struct sock
*sk
,
175 struct sk_buff
*l3mdev_l3_rcv(struct sk_buff
*skb
, u16 proto
)
177 struct net_device
*master
= NULL
;
179 if (netif_is_l3_slave(skb
->dev
))
180 master
= netdev_master_upper_dev_get_rcu(skb
->dev
);
181 else if (netif_is_l3_master(skb
->dev
))
184 if (master
&& master
->l3mdev_ops
->l3mdev_l3_rcv
)
185 skb
= master
->l3mdev_ops
->l3mdev_l3_rcv(master
, skb
, proto
);
191 struct sk_buff
*l3mdev_ip_rcv(struct sk_buff
*skb
)
193 return l3mdev_l3_rcv(skb
, AF_INET
);
197 struct sk_buff
*l3mdev_ip6_rcv(struct sk_buff
*skb
)
199 return l3mdev_l3_rcv(skb
, AF_INET6
);
204 static inline int l3mdev_master_ifindex_rcu(const struct net_device
*dev
)
208 static inline int l3mdev_master_ifindex(struct net_device
*dev
)
213 static inline int l3mdev_master_ifindex_by_index(struct net
*net
, int ifindex
)
219 const struct net_device
*l3mdev_master_dev_rcu(const struct net_device
*dev
)
224 static inline int l3mdev_fib_oif_rcu(struct net_device
*dev
)
226 return dev
? dev
->ifindex
: 0;
228 static inline int l3mdev_fib_oif(struct net_device
*dev
)
230 return dev
? dev
->ifindex
: 0;
233 static inline u32
l3mdev_fib_table_rcu(const struct net_device
*dev
)
237 static inline u32
l3mdev_fib_table(const struct net_device
*dev
)
241 static inline u32
l3mdev_fib_table_by_index(struct net
*net
, int ifindex
)
246 static inline struct rtable
*l3mdev_get_rtable(const struct net_device
*dev
,
247 const struct flowi4
*fl4
)
252 static inline bool netif_index_is_l3_master(struct net
*net
, int ifindex
)
257 static inline int l3mdev_get_saddr(struct net
*net
, int ifindex
,
264 struct dst_entry
*l3mdev_get_rt6_dst(struct net
*net
, struct flowi6
*fl6
)
269 static inline int l3mdev_get_saddr6(struct net
*net
, const struct sock
*sk
,
276 struct sk_buff
*l3mdev_ip_rcv(struct sk_buff
*skb
)
282 struct sk_buff
*l3mdev_ip6_rcv(struct sk_buff
*skb
)
288 int l3mdev_fib_rule_match(struct net
*net
, struct flowi
*fl
,
289 struct fib_lookup_arg
*arg
)
295 #endif /* _NET_L3MDEV_H_ */
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