Commit | Line | Data |
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2874c5fd | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
1b69c6d0 DA |
2 | /* |
3 | * include/net/l3mdev.h - L3 master device API | |
4 | * Copyright (c) 2015 Cumulus Networks | |
5 | * Copyright (c) 2015 David Ahern <dsa@cumulusnetworks.com> | |
1b69c6d0 DA |
6 | */ |
7 | #ifndef _NET_L3MDEV_H_ | |
8 | #define _NET_L3MDEV_H_ | |
9 | ||
a8e3e1a9 | 10 | #include <net/dst.h> |
96c63fa7 DA |
11 | #include <net/fib_rules.h> |
12 | ||
49042c22 AM |
13 | enum l3mdev_type { |
14 | L3MDEV_TYPE_UNSPEC, | |
15 | L3MDEV_TYPE_VRF, | |
16 | __L3MDEV_TYPE_MAX | |
17 | }; | |
18 | ||
19 | #define L3MDEV_TYPE_MAX (__L3MDEV_TYPE_MAX - 1) | |
20 | ||
21 | typedef int (*lookup_by_table_id_t)(struct net *net, u32 table_d); | |
22 | ||
1b69c6d0 DA |
23 | /** |
24 | * struct l3mdev_ops - l3mdev operations | |
25 | * | |
26 | * @l3mdev_fib_table: Get FIB table id to use for lookups | |
27 | * | |
a8e3e1a9 DA |
28 | * @l3mdev_l3_rcv: Hook in L3 receive path |
29 | * | |
30 | * @l3mdev_l3_out: Hook in L3 output path | |
31 | * | |
4c1feac5 | 32 | * @l3mdev_link_scope_lookup: IPv6 lookup for linklocal and mcast destinations |
1b69c6d0 DA |
33 | */ |
34 | ||
35 | struct l3mdev_ops { | |
36 | u32 (*l3mdev_fib_table)(const struct net_device *dev); | |
74b20582 DA |
37 | struct sk_buff * (*l3mdev_l3_rcv)(struct net_device *dev, |
38 | struct sk_buff *skb, u16 proto); | |
a8e3e1a9 DA |
39 | struct sk_buff * (*l3mdev_l3_out)(struct net_device *dev, |
40 | struct sock *sk, struct sk_buff *skb, | |
41 | u16 proto); | |
ccf3c8c3 | 42 | |
ccf3c8c3 | 43 | /* IPv6 ops */ |
4c1feac5 | 44 | struct dst_entry * (*l3mdev_link_scope_lookup)(const struct net_device *dev, |
cd2a9e62 | 45 | struct flowi6 *fl6); |
1b69c6d0 DA |
46 | }; |
47 | ||
48 | #ifdef CONFIG_NET_L3_MASTER_DEV | |
49 | ||
49042c22 AM |
50 | int l3mdev_table_lookup_register(enum l3mdev_type l3type, |
51 | lookup_by_table_id_t fn); | |
52 | ||
53 | void l3mdev_table_lookup_unregister(enum l3mdev_type l3type, | |
54 | lookup_by_table_id_t fn); | |
55 | ||
56 | int l3mdev_ifindex_lookup_by_table_id(enum l3mdev_type l3type, struct net *net, | |
57 | u32 table_id); | |
58 | ||
96c63fa7 DA |
59 | int l3mdev_fib_rule_match(struct net *net, struct flowi *fl, |
60 | struct fib_lookup_arg *arg); | |
61 | ||
9ee0034b DA |
62 | void l3mdev_update_flow(struct net *net, struct flowi *fl); |
63 | ||
3f2fb9a8 | 64 | int l3mdev_master_ifindex_rcu(const struct net_device *dev); |
1b69c6d0 DA |
65 | static inline int l3mdev_master_ifindex(struct net_device *dev) |
66 | { | |
67 | int ifindex; | |
68 | ||
69 | rcu_read_lock(); | |
70 | ifindex = l3mdev_master_ifindex_rcu(dev); | |
71 | rcu_read_unlock(); | |
72 | ||
73 | return ifindex; | |
74 | } | |
75 | ||
1a852479 DA |
76 | static inline int l3mdev_master_ifindex_by_index(struct net *net, int ifindex) |
77 | { | |
78 | struct net_device *dev; | |
79 | int rc = 0; | |
80 | ||
81 | if (likely(ifindex)) { | |
82 | rcu_read_lock(); | |
83 | ||
84 | dev = dev_get_by_index_rcu(net, ifindex); | |
85 | if (dev) | |
86 | rc = l3mdev_master_ifindex_rcu(dev); | |
87 | ||
88 | rcu_read_unlock(); | |
89 | } | |
90 | ||
91 | return rc; | |
92 | } | |
93 | ||
afbac601 | 94 | static inline |
5f02ce24 | 95 | struct net_device *l3mdev_master_dev_rcu(const struct net_device *_dev) |
afbac601 DA |
96 | { |
97 | /* netdev_master_upper_dev_get_rcu calls | |
98 | * list_first_or_null_rcu to walk the upper dev list. | |
99 | * list_first_or_null_rcu does not handle a const arg. We aren't | |
100 | * making changes, just want the master device from that list so | |
101 | * typecast to remove the const | |
102 | */ | |
103 | struct net_device *dev = (struct net_device *)_dev; | |
5f02ce24 | 104 | struct net_device *master; |
afbac601 DA |
105 | |
106 | if (!dev) | |
107 | return NULL; | |
108 | ||
109 | if (netif_is_l3_master(dev)) | |
110 | master = dev; | |
111 | else if (netif_is_l3_slave(dev)) | |
112 | master = netdev_master_upper_dev_get_rcu(dev); | |
113 | else | |
114 | master = NULL; | |
115 | ||
116 | return master; | |
117 | } | |
118 | ||
6a6d6681 AB |
119 | int l3mdev_master_upper_ifindex_by_index_rcu(struct net *net, int ifindex); |
120 | static inline | |
121 | int l3mdev_master_upper_ifindex_by_index(struct net *net, int ifindex) | |
122 | { | |
123 | rcu_read_lock(); | |
124 | ifindex = l3mdev_master_upper_ifindex_by_index_rcu(net, ifindex); | |
125 | rcu_read_unlock(); | |
126 | ||
127 | return ifindex; | |
128 | } | |
129 | ||
1b69c6d0 DA |
130 | u32 l3mdev_fib_table_rcu(const struct net_device *dev); |
131 | u32 l3mdev_fib_table_by_index(struct net *net, int ifindex); | |
132 | static inline u32 l3mdev_fib_table(const struct net_device *dev) | |
133 | { | |
134 | u32 tb_id; | |
135 | ||
136 | rcu_read_lock(); | |
137 | tb_id = l3mdev_fib_table_rcu(dev); | |
138 | rcu_read_unlock(); | |
139 | ||
140 | return tb_id; | |
141 | } | |
142 | ||
6104e112 DA |
143 | static inline bool netif_index_is_l3_master(struct net *net, int ifindex) |
144 | { | |
145 | struct net_device *dev; | |
146 | bool rc = false; | |
147 | ||
148 | if (ifindex == 0) | |
149 | return false; | |
150 | ||
151 | rcu_read_lock(); | |
152 | ||
153 | dev = dev_get_by_index_rcu(net, ifindex); | |
154 | if (dev) | |
155 | rc = netif_is_l3_master(dev); | |
156 | ||
157 | rcu_read_unlock(); | |
158 | ||
159 | return rc; | |
160 | } | |
161 | ||
4c1feac5 | 162 | struct dst_entry *l3mdev_link_scope_lookup(struct net *net, struct flowi6 *fl6); |
ccf3c8c3 | 163 | |
74b20582 DA |
164 | static inline |
165 | struct sk_buff *l3mdev_l3_rcv(struct sk_buff *skb, u16 proto) | |
166 | { | |
167 | struct net_device *master = NULL; | |
168 | ||
169 | if (netif_is_l3_slave(skb->dev)) | |
170 | master = netdev_master_upper_dev_get_rcu(skb->dev); | |
d5256083 DB |
171 | else if (netif_is_l3_master(skb->dev) || |
172 | netif_has_l3_rx_handler(skb->dev)) | |
74b20582 DA |
173 | master = skb->dev; |
174 | ||
175 | if (master && master->l3mdev_ops->l3mdev_l3_rcv) | |
176 | skb = master->l3mdev_ops->l3mdev_l3_rcv(master, skb, proto); | |
177 | ||
178 | return skb; | |
179 | } | |
180 | ||
181 | static inline | |
182 | struct sk_buff *l3mdev_ip_rcv(struct sk_buff *skb) | |
183 | { | |
184 | return l3mdev_l3_rcv(skb, AF_INET); | |
185 | } | |
186 | ||
187 | static inline | |
188 | struct sk_buff *l3mdev_ip6_rcv(struct sk_buff *skb) | |
189 | { | |
190 | return l3mdev_l3_rcv(skb, AF_INET6); | |
191 | } | |
192 | ||
a8e3e1a9 DA |
193 | static inline |
194 | struct sk_buff *l3mdev_l3_out(struct sock *sk, struct sk_buff *skb, u16 proto) | |
195 | { | |
196 | struct net_device *dev = skb_dst(skb)->dev; | |
197 | ||
198 | if (netif_is_l3_slave(dev)) { | |
199 | struct net_device *master; | |
200 | ||
201 | master = netdev_master_upper_dev_get_rcu(dev); | |
202 | if (master && master->l3mdev_ops->l3mdev_l3_out) | |
203 | skb = master->l3mdev_ops->l3mdev_l3_out(master, sk, | |
204 | skb, proto); | |
205 | } | |
206 | ||
207 | return skb; | |
208 | } | |
209 | ||
210 | static inline | |
211 | struct sk_buff *l3mdev_ip_out(struct sock *sk, struct sk_buff *skb) | |
212 | { | |
213 | return l3mdev_l3_out(sk, skb, AF_INET); | |
214 | } | |
215 | ||
216 | static inline | |
217 | struct sk_buff *l3mdev_ip6_out(struct sock *sk, struct sk_buff *skb) | |
218 | { | |
219 | return l3mdev_l3_out(sk, skb, AF_INET6); | |
220 | } | |
1b69c6d0 DA |
221 | #else |
222 | ||
3f2fb9a8 | 223 | static inline int l3mdev_master_ifindex_rcu(const struct net_device *dev) |
1b69c6d0 DA |
224 | { |
225 | return 0; | |
226 | } | |
227 | static inline int l3mdev_master_ifindex(struct net_device *dev) | |
228 | { | |
229 | return 0; | |
230 | } | |
231 | ||
1a852479 DA |
232 | static inline int l3mdev_master_ifindex_by_index(struct net *net, int ifindex) |
233 | { | |
234 | return 0; | |
235 | } | |
236 | ||
6a6d6681 AB |
237 | static inline |
238 | int l3mdev_master_upper_ifindex_by_index_rcu(struct net *net, int ifindex) | |
239 | { | |
240 | return 0; | |
241 | } | |
242 | static inline | |
243 | int l3mdev_master_upper_ifindex_by_index(struct net *net, int ifindex) | |
244 | { | |
245 | return 0; | |
246 | } | |
247 | ||
afbac601 | 248 | static inline |
5f02ce24 | 249 | struct net_device *l3mdev_master_dev_rcu(const struct net_device *dev) |
afbac601 DA |
250 | { |
251 | return NULL; | |
252 | } | |
253 | ||
1b69c6d0 DA |
254 | static inline u32 l3mdev_fib_table_rcu(const struct net_device *dev) |
255 | { | |
256 | return 0; | |
257 | } | |
258 | static inline u32 l3mdev_fib_table(const struct net_device *dev) | |
259 | { | |
260 | return 0; | |
261 | } | |
262 | static inline u32 l3mdev_fib_table_by_index(struct net *net, int ifindex) | |
263 | { | |
264 | return 0; | |
265 | } | |
266 | ||
6104e112 DA |
267 | static inline bool netif_index_is_l3_master(struct net *net, int ifindex) |
268 | { | |
269 | return false; | |
270 | } | |
271 | ||
ccf3c8c3 | 272 | static inline |
4c1feac5 | 273 | struct dst_entry *l3mdev_link_scope_lookup(struct net *net, struct flowi6 *fl6) |
ccf3c8c3 DA |
274 | { |
275 | return NULL; | |
276 | } | |
74b20582 DA |
277 | |
278 | static inline | |
279 | struct sk_buff *l3mdev_ip_rcv(struct sk_buff *skb) | |
280 | { | |
281 | return skb; | |
282 | } | |
283 | ||
284 | static inline | |
285 | struct sk_buff *l3mdev_ip6_rcv(struct sk_buff *skb) | |
286 | { | |
287 | return skb; | |
288 | } | |
96c63fa7 | 289 | |
a8e3e1a9 DA |
290 | static inline |
291 | struct sk_buff *l3mdev_ip_out(struct sock *sk, struct sk_buff *skb) | |
292 | { | |
293 | return skb; | |
294 | } | |
295 | ||
296 | static inline | |
297 | struct sk_buff *l3mdev_ip6_out(struct sock *sk, struct sk_buff *skb) | |
298 | { | |
299 | return skb; | |
300 | } | |
301 | ||
49042c22 AM |
302 | static inline |
303 | int l3mdev_table_lookup_register(enum l3mdev_type l3type, | |
304 | lookup_by_table_id_t fn) | |
305 | { | |
306 | return -EOPNOTSUPP; | |
307 | } | |
308 | ||
309 | static inline | |
310 | void l3mdev_table_lookup_unregister(enum l3mdev_type l3type, | |
311 | lookup_by_table_id_t fn) | |
312 | { | |
313 | } | |
314 | ||
315 | static inline | |
316 | int l3mdev_ifindex_lookup_by_table_id(enum l3mdev_type l3type, struct net *net, | |
317 | u32 table_id) | |
318 | { | |
319 | return -ENODEV; | |
320 | } | |
321 | ||
96c63fa7 DA |
322 | static inline |
323 | int l3mdev_fib_rule_match(struct net *net, struct flowi *fl, | |
324 | struct fib_lookup_arg *arg) | |
325 | { | |
326 | return 1; | |
327 | } | |
9ee0034b DA |
328 | static inline |
329 | void l3mdev_update_flow(struct net *net, struct flowi *fl) | |
330 | { | |
331 | } | |
1b69c6d0 DA |
332 | #endif |
333 | ||
334 | #endif /* _NET_L3MDEV_H_ */ |