xref: /openbmc/linux/include/net/switchdev.h (revision a2cce7a9)
1 /*
2  * include/net/switchdev.h - Switch device API
3  * Copyright (c) 2014 Jiri Pirko <jiri@resnulli.us>
4  * Copyright (c) 2014-2015 Scott Feldman <sfeldma@gmail.com>
5  *
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.
10  */
11 #ifndef _LINUX_SWITCHDEV_H_
12 #define _LINUX_SWITCHDEV_H_
13 
14 #include <linux/netdevice.h>
15 #include <linux/notifier.h>
16 
17 #define SWITCHDEV_F_NO_RECURSE		BIT(0)
18 
19 enum switchdev_trans {
20 	SWITCHDEV_TRANS_NONE,
21 	SWITCHDEV_TRANS_PREPARE,
22 	SWITCHDEV_TRANS_ABORT,
23 	SWITCHDEV_TRANS_COMMIT,
24 };
25 
26 enum switchdev_attr_id {
27 	SWITCHDEV_ATTR_UNDEFINED,
28 	SWITCHDEV_ATTR_PORT_PARENT_ID,
29 	SWITCHDEV_ATTR_PORT_STP_STATE,
30 	SWITCHDEV_ATTR_PORT_BRIDGE_FLAGS,
31 };
32 
33 struct switchdev_attr {
34 	enum switchdev_attr_id id;
35 	enum switchdev_trans trans;
36 	u32 flags;
37 	union {
38 		struct netdev_phys_item_id ppid;	/* PORT_PARENT_ID */
39 		u8 stp_state;				/* PORT_STP_STATE */
40 		unsigned long brport_flags;		/* PORT_BRIDGE_FLAGS */
41 	} u;
42 };
43 
44 struct fib_info;
45 
46 enum switchdev_obj_id {
47 	SWITCHDEV_OBJ_UNDEFINED,
48 	SWITCHDEV_OBJ_PORT_VLAN,
49 	SWITCHDEV_OBJ_IPV4_FIB,
50 	SWITCHDEV_OBJ_PORT_FDB,
51 };
52 
53 struct switchdev_obj {
54 	enum switchdev_obj_id id;
55 	enum switchdev_trans trans;
56 	int (*cb)(struct net_device *dev, struct switchdev_obj *obj);
57 	union {
58 		struct switchdev_obj_vlan {		/* PORT_VLAN */
59 			u16 flags;
60 			u16 vid_begin;
61 			u16 vid_end;
62 		} vlan;
63 		struct switchdev_obj_ipv4_fib {		/* IPV4_FIB */
64 			u32 dst;
65 			int dst_len;
66 			struct fib_info *fi;
67 			u8 tos;
68 			u8 type;
69 			u32 nlflags;
70 			u32 tb_id;
71 		} ipv4_fib;
72 		struct switchdev_obj_fdb {		/* PORT_FDB */
73 			const unsigned char *addr;
74 			u16 vid;
75 			u16 ndm_state;
76 		} fdb;
77 	} u;
78 };
79 
80 /**
81  * struct switchdev_ops - switchdev operations
82  *
83  * @switchdev_port_attr_get: Get a port attribute (see switchdev_attr).
84  *
85  * @switchdev_port_attr_set: Set a port attribute (see switchdev_attr).
86  *
87  * @switchdev_port_obj_add: Add an object to port (see switchdev_obj).
88  *
89  * @switchdev_port_obj_del: Delete an object from port (see switchdev_obj).
90  *
91  * @switchdev_port_obj_dump: Dump port objects (see switchdev_obj).
92  */
93 struct switchdev_ops {
94 	int	(*switchdev_port_attr_get)(struct net_device *dev,
95 					   struct switchdev_attr *attr);
96 	int	(*switchdev_port_attr_set)(struct net_device *dev,
97 					   struct switchdev_attr *attr);
98 	int	(*switchdev_port_obj_add)(struct net_device *dev,
99 					  struct switchdev_obj *obj);
100 	int	(*switchdev_port_obj_del)(struct net_device *dev,
101 					  struct switchdev_obj *obj);
102 	int	(*switchdev_port_obj_dump)(struct net_device *dev,
103 					  struct switchdev_obj *obj);
104 };
105 
106 enum switchdev_notifier_type {
107 	SWITCHDEV_FDB_ADD = 1,
108 	SWITCHDEV_FDB_DEL,
109 };
110 
111 struct switchdev_notifier_info {
112 	struct net_device *dev;
113 };
114 
115 struct switchdev_notifier_fdb_info {
116 	struct switchdev_notifier_info info; /* must be first */
117 	const unsigned char *addr;
118 	u16 vid;
119 };
120 
121 static inline struct net_device *
122 switchdev_notifier_info_to_dev(const struct switchdev_notifier_info *info)
123 {
124 	return info->dev;
125 }
126 
127 #ifdef CONFIG_NET_SWITCHDEV
128 
129 int switchdev_port_attr_get(struct net_device *dev,
130 			    struct switchdev_attr *attr);
131 int switchdev_port_attr_set(struct net_device *dev,
132 			    struct switchdev_attr *attr);
133 int switchdev_port_obj_add(struct net_device *dev, struct switchdev_obj *obj);
134 int switchdev_port_obj_del(struct net_device *dev, struct switchdev_obj *obj);
135 int switchdev_port_obj_dump(struct net_device *dev, struct switchdev_obj *obj);
136 int register_switchdev_notifier(struct notifier_block *nb);
137 int unregister_switchdev_notifier(struct notifier_block *nb);
138 int call_switchdev_notifiers(unsigned long val, struct net_device *dev,
139 			     struct switchdev_notifier_info *info);
140 int switchdev_port_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
141 				  struct net_device *dev, u32 filter_mask,
142 				  int nlflags);
143 int switchdev_port_bridge_setlink(struct net_device *dev,
144 				  struct nlmsghdr *nlh, u16 flags);
145 int switchdev_port_bridge_dellink(struct net_device *dev,
146 				  struct nlmsghdr *nlh, u16 flags);
147 int switchdev_fib_ipv4_add(u32 dst, int dst_len, struct fib_info *fi,
148 			   u8 tos, u8 type, u32 nlflags, u32 tb_id);
149 int switchdev_fib_ipv4_del(u32 dst, int dst_len, struct fib_info *fi,
150 			   u8 tos, u8 type, u32 tb_id);
151 void switchdev_fib_ipv4_abort(struct fib_info *fi);
152 int switchdev_port_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
153 			   struct net_device *dev, const unsigned char *addr,
154 			   u16 vid, u16 nlm_flags);
155 int switchdev_port_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
156 			   struct net_device *dev, const unsigned char *addr,
157 			   u16 vid);
158 int switchdev_port_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
159 			    struct net_device *dev,
160 			    struct net_device *filter_dev, int idx);
161 void switchdev_port_fwd_mark_set(struct net_device *dev,
162 				 struct net_device *group_dev,
163 				 bool joining);
164 
165 #else
166 
167 static inline int switchdev_port_attr_get(struct net_device *dev,
168 					  struct switchdev_attr *attr)
169 {
170 	return -EOPNOTSUPP;
171 }
172 
173 static inline int switchdev_port_attr_set(struct net_device *dev,
174 					  struct switchdev_attr *attr)
175 {
176 	return -EOPNOTSUPP;
177 }
178 
179 static inline int switchdev_port_obj_add(struct net_device *dev,
180 					 struct switchdev_obj *obj)
181 {
182 	return -EOPNOTSUPP;
183 }
184 
185 static inline int switchdev_port_obj_del(struct net_device *dev,
186 					 struct switchdev_obj *obj)
187 {
188 	return -EOPNOTSUPP;
189 }
190 
191 static inline int switchdev_port_obj_dump(struct net_device *dev,
192 					  struct switchdev_obj *obj)
193 {
194 	return -EOPNOTSUPP;
195 }
196 
197 static inline int register_switchdev_notifier(struct notifier_block *nb)
198 {
199 	return 0;
200 }
201 
202 static inline int unregister_switchdev_notifier(struct notifier_block *nb)
203 {
204 	return 0;
205 }
206 
207 static inline int call_switchdev_notifiers(unsigned long val,
208 					   struct net_device *dev,
209 					   struct switchdev_notifier_info *info)
210 {
211 	return NOTIFY_DONE;
212 }
213 
214 static inline int switchdev_port_bridge_getlink(struct sk_buff *skb, u32 pid,
215 					    u32 seq, struct net_device *dev,
216 					    u32 filter_mask, int nlflags)
217 {
218 	return -EOPNOTSUPP;
219 }
220 
221 static inline int switchdev_port_bridge_setlink(struct net_device *dev,
222 						struct nlmsghdr *nlh,
223 						u16 flags)
224 {
225 	return -EOPNOTSUPP;
226 }
227 
228 static inline int switchdev_port_bridge_dellink(struct net_device *dev,
229 						struct nlmsghdr *nlh,
230 						u16 flags)
231 {
232 	return -EOPNOTSUPP;
233 }
234 
235 static inline int switchdev_fib_ipv4_add(u32 dst, int dst_len,
236 					 struct fib_info *fi,
237 					 u8 tos, u8 type,
238 					 u32 nlflags, u32 tb_id)
239 {
240 	return 0;
241 }
242 
243 static inline int switchdev_fib_ipv4_del(u32 dst, int dst_len,
244 					 struct fib_info *fi,
245 					 u8 tos, u8 type, u32 tb_id)
246 {
247 	return 0;
248 }
249 
250 static inline void switchdev_fib_ipv4_abort(struct fib_info *fi)
251 {
252 }
253 
254 static inline int switchdev_port_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
255 					 struct net_device *dev,
256 					 const unsigned char *addr,
257 					 u16 vid, u16 nlm_flags)
258 {
259 	return -EOPNOTSUPP;
260 }
261 
262 static inline int switchdev_port_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
263 					 struct net_device *dev,
264 					 const unsigned char *addr, u16 vid)
265 {
266 	return -EOPNOTSUPP;
267 }
268 
269 static inline int switchdev_port_fdb_dump(struct sk_buff *skb,
270 					  struct netlink_callback *cb,
271 					  struct net_device *dev,
272 					  struct net_device *filter_dev,
273 					  int idx)
274 {
275 	return -EOPNOTSUPP;
276 }
277 
278 static inline void switchdev_port_fwd_mark_set(struct net_device *dev,
279 					       struct net_device *group_dev,
280 					       bool joining)
281 {
282 }
283 
284 #endif
285 
286 #endif /* _LINUX_SWITCHDEV_H_ */
287