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git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/blob - include/net/l3mdev.h
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 #include <net/fib_rules.h>
18 * struct l3mdev_ops - l3mdev operations
20 * @l3mdev_fib_table: Get FIB table id to use for lookups
22 * @l3mdev_l3_rcv: Hook in L3 receive path
24 * @l3mdev_l3_out: Hook in L3 output path
26 * @l3mdev_link_scope_lookup: IPv6 lookup for linklocal and mcast destinations
30 u32 (*l3mdev_fib_table
)(const struct net_device
*dev
);
31 struct sk_buff
* (*l3mdev_l3_rcv
)(struct net_device
*dev
,
32 struct sk_buff
*skb
, u16 proto
);
33 struct sk_buff
* (*l3mdev_l3_out
)(struct net_device
*dev
,
34 struct sock
*sk
, struct sk_buff
*skb
,
38 struct dst_entry
* (*l3mdev_link_scope_lookup
)(const struct net_device
*dev
,
42 #ifdef CONFIG_NET_L3_MASTER_DEV
44 int l3mdev_fib_rule_match(struct net
*net
, struct flowi
*fl
,
45 struct fib_lookup_arg
*arg
);
47 void l3mdev_update_flow(struct net
*net
, struct flowi
*fl
);
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
);
80 struct net_device
*l3mdev_master_dev_rcu(const struct net_device
*_dev
)
82 /* netdev_master_upper_dev_get_rcu calls
83 * list_first_or_null_rcu to walk the upper dev list.
84 * list_first_or_null_rcu does not handle a const arg. We aren't
85 * making changes, just want the master device from that list so
86 * typecast to remove the const
88 struct net_device
*dev
= (struct net_device
*)_dev
;
89 struct net_device
*master
;
94 if (netif_is_l3_master(dev
))
96 else if (netif_is_l3_slave(dev
))
97 master
= netdev_master_upper_dev_get_rcu(dev
);
104 int l3mdev_master_upper_ifindex_by_index_rcu(struct net
*net
, int ifindex
);
106 int l3mdev_master_upper_ifindex_by_index(struct net
*net
, int ifindex
)
109 ifindex
= l3mdev_master_upper_ifindex_by_index_rcu(net
, ifindex
);
115 u32
l3mdev_fib_table_rcu(const struct net_device
*dev
);
116 u32
l3mdev_fib_table_by_index(struct net
*net
, int ifindex
);
117 static inline u32
l3mdev_fib_table(const struct net_device
*dev
)
122 tb_id
= l3mdev_fib_table_rcu(dev
);
128 static inline bool netif_index_is_l3_master(struct net
*net
, int ifindex
)
130 struct net_device
*dev
;
138 dev
= dev_get_by_index_rcu(net
, ifindex
);
140 rc
= netif_is_l3_master(dev
);
147 struct dst_entry
*l3mdev_link_scope_lookup(struct net
*net
, struct flowi6
*fl6
);
150 struct sk_buff
*l3mdev_l3_rcv(struct sk_buff
*skb
, u16 proto
)
152 struct net_device
*master
= NULL
;
154 if (netif_is_l3_slave(skb
->dev
))
155 master
= netdev_master_upper_dev_get_rcu(skb
->dev
);
156 else if (netif_is_l3_master(skb
->dev
) ||
157 netif_has_l3_rx_handler(skb
->dev
))
160 if (master
&& master
->l3mdev_ops
->l3mdev_l3_rcv
)
161 skb
= master
->l3mdev_ops
->l3mdev_l3_rcv(master
, skb
, proto
);
167 struct sk_buff
*l3mdev_ip_rcv(struct sk_buff
*skb
)
169 return l3mdev_l3_rcv(skb
, AF_INET
);
173 struct sk_buff
*l3mdev_ip6_rcv(struct sk_buff
*skb
)
175 return l3mdev_l3_rcv(skb
, AF_INET6
);
179 struct sk_buff
*l3mdev_l3_out(struct sock
*sk
, struct sk_buff
*skb
, u16 proto
)
181 struct net_device
*dev
= skb_dst(skb
)->dev
;
183 if (netif_is_l3_slave(dev
)) {
184 struct net_device
*master
;
186 master
= netdev_master_upper_dev_get_rcu(dev
);
187 if (master
&& master
->l3mdev_ops
->l3mdev_l3_out
)
188 skb
= master
->l3mdev_ops
->l3mdev_l3_out(master
, sk
,
196 struct sk_buff
*l3mdev_ip_out(struct sock
*sk
, struct sk_buff
*skb
)
198 return l3mdev_l3_out(sk
, skb
, AF_INET
);
202 struct sk_buff
*l3mdev_ip6_out(struct sock
*sk
, struct sk_buff
*skb
)
204 return l3mdev_l3_out(sk
, skb
, AF_INET6
);
208 static inline int l3mdev_master_ifindex_rcu(const struct net_device
*dev
)
212 static inline int l3mdev_master_ifindex(struct net_device
*dev
)
217 static inline int l3mdev_master_ifindex_by_index(struct net
*net
, int ifindex
)
223 int l3mdev_master_upper_ifindex_by_index_rcu(struct net
*net
, int ifindex
)
228 int l3mdev_master_upper_ifindex_by_index(struct net
*net
, int ifindex
)
234 struct net_device
*l3mdev_master_dev_rcu(const struct net_device
*dev
)
239 static inline u32
l3mdev_fib_table_rcu(const struct net_device
*dev
)
243 static inline u32
l3mdev_fib_table(const struct net_device
*dev
)
247 static inline u32
l3mdev_fib_table_by_index(struct net
*net
, int ifindex
)
252 static inline bool netif_index_is_l3_master(struct net
*net
, int ifindex
)
258 struct dst_entry
*l3mdev_link_scope_lookup(struct net
*net
, struct flowi6
*fl6
)
264 struct sk_buff
*l3mdev_ip_rcv(struct sk_buff
*skb
)
270 struct sk_buff
*l3mdev_ip6_rcv(struct sk_buff
*skb
)
276 struct sk_buff
*l3mdev_ip_out(struct sock
*sk
, struct sk_buff
*skb
)
282 struct sk_buff
*l3mdev_ip6_out(struct sock
*sk
, struct sk_buff
*skb
)
288 int l3mdev_fib_rule_match(struct net
*net
, struct flowi
*fl
,
289 struct fib_lookup_arg
*arg
)
294 void l3mdev_update_flow(struct net
*net
, struct flowi
*fl
)
299 #endif /* _NET_L3MDEV_H_ */