1 /*
2  * include/net/switchdev.h - Switch device API
3  * Copyright (c) 2014-2015 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 #include <linux/list.h>
17 #include <net/ip_fib.h>
18 
19 #define SWITCHDEV_F_NO_RECURSE		BIT(0)
20 #define SWITCHDEV_F_SKIP_EOPNOTSUPP	BIT(1)
21 #define SWITCHDEV_F_DEFER		BIT(2)
22 
23 struct switchdev_trans_item {
24 	struct list_head list;
25 	void *data;
26 	void (*destructor)(const void *data);
27 };
28 
29 struct switchdev_trans {
30 	struct list_head item_list;
31 	bool ph_prepare;
32 };
33 
switchdev_trans_ph_prepare(struct switchdev_trans * trans)34 static inline bool switchdev_trans_ph_prepare(struct switchdev_trans *trans)
35 {
36 	return trans && trans->ph_prepare;
37 }
38 
switchdev_trans_ph_commit(struct switchdev_trans * trans)39 static inline bool switchdev_trans_ph_commit(struct switchdev_trans *trans)
40 {
41 	return trans && !trans->ph_prepare;
42 }
43 
44 enum switchdev_attr_id {
45 	SWITCHDEV_ATTR_ID_UNDEFINED,
46 	SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
47 	SWITCHDEV_ATTR_ID_PORT_STP_STATE,
48 	SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS,
49 	SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS_SUPPORT,
50 	SWITCHDEV_ATTR_ID_PORT_MROUTER,
51 	SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME,
52 	SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING,
53 	SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED,
54 	SWITCHDEV_ATTR_ID_BRIDGE_MROUTER,
55 };
56 
57 struct switchdev_attr {
58 	struct net_device *orig_dev;
59 	enum switchdev_attr_id id;
60 	u32 flags;
61 	void *complete_priv;
62 	void (*complete)(struct net_device *dev, int err, void *priv);
63 	union {
64 		struct netdev_phys_item_id ppid;	/* PORT_PARENT_ID */
65 		u8 stp_state;				/* PORT_STP_STATE */
66 		unsigned long brport_flags;		/* PORT_BRIDGE_FLAGS */
67 		unsigned long brport_flags_support;	/* PORT_BRIDGE_FLAGS_SUPPORT */
68 		bool mrouter;				/* PORT_MROUTER */
69 		clock_t ageing_time;			/* BRIDGE_AGEING_TIME */
70 		bool vlan_filtering;			/* BRIDGE_VLAN_FILTERING */
71 		bool mc_disabled;			/* MC_DISABLED */
72 	} u;
73 };
74 
75 enum switchdev_obj_id {
76 	SWITCHDEV_OBJ_ID_UNDEFINED,
77 	SWITCHDEV_OBJ_ID_PORT_VLAN,
78 	SWITCHDEV_OBJ_ID_PORT_MDB,
79 	SWITCHDEV_OBJ_ID_HOST_MDB,
80 };
81 
82 struct switchdev_obj {
83 	struct net_device *orig_dev;
84 	enum switchdev_obj_id id;
85 	u32 flags;
86 	void *complete_priv;
87 	void (*complete)(struct net_device *dev, int err, void *priv);
88 };
89 
90 /* SWITCHDEV_OBJ_ID_PORT_VLAN */
91 struct switchdev_obj_port_vlan {
92 	struct switchdev_obj obj;
93 	u16 flags;
94 	u16 vid_begin;
95 	u16 vid_end;
96 };
97 
98 #define SWITCHDEV_OBJ_PORT_VLAN(obj) \
99 	container_of(obj, struct switchdev_obj_port_vlan, obj)
100 
101 /* SWITCHDEV_OBJ_ID_PORT_MDB */
102 struct switchdev_obj_port_mdb {
103 	struct switchdev_obj obj;
104 	unsigned char addr[ETH_ALEN];
105 	u16 vid;
106 };
107 
108 #define SWITCHDEV_OBJ_PORT_MDB(obj) \
109 	container_of(obj, struct switchdev_obj_port_mdb, obj)
110 
111 void switchdev_trans_item_enqueue(struct switchdev_trans *trans,
112 				  void *data, void (*destructor)(void const *),
113 				  struct switchdev_trans_item *tritem);
114 void *switchdev_trans_item_dequeue(struct switchdev_trans *trans);
115 
116 typedef int switchdev_obj_dump_cb_t(struct switchdev_obj *obj);
117 
118 /**
119  * struct switchdev_ops - switchdev operations
120  *
121  * @switchdev_port_attr_get: Get a port attribute (see switchdev_attr).
122  *
123  * @switchdev_port_attr_set: Set a port attribute (see switchdev_attr).
124  *
125  * @switchdev_port_obj_add: Add an object to port (see switchdev_obj_*).
126  *
127  * @switchdev_port_obj_del: Delete an object from port (see switchdev_obj_*).
128  */
129 struct switchdev_ops {
130 	int	(*switchdev_port_attr_get)(struct net_device *dev,
131 					   struct switchdev_attr *attr);
132 	int	(*switchdev_port_attr_set)(struct net_device *dev,
133 					   const struct switchdev_attr *attr,
134 					   struct switchdev_trans *trans);
135 	int	(*switchdev_port_obj_add)(struct net_device *dev,
136 					  const struct switchdev_obj *obj,
137 					  struct switchdev_trans *trans);
138 	int	(*switchdev_port_obj_del)(struct net_device *dev,
139 					  const struct switchdev_obj *obj);
140 };
141 
142 enum switchdev_notifier_type {
143 	SWITCHDEV_FDB_ADD_TO_BRIDGE = 1,
144 	SWITCHDEV_FDB_DEL_TO_BRIDGE,
145 	SWITCHDEV_FDB_ADD_TO_DEVICE,
146 	SWITCHDEV_FDB_DEL_TO_DEVICE,
147 	SWITCHDEV_FDB_OFFLOADED,
148 };
149 
150 struct switchdev_notifier_info {
151 	struct net_device *dev;
152 };
153 
154 struct switchdev_notifier_fdb_info {
155 	struct switchdev_notifier_info info; /* must be first */
156 	const unsigned char *addr;
157 	u16 vid;
158 	bool added_by_user;
159 };
160 
161 static inline struct net_device *
switchdev_notifier_info_to_dev(const struct switchdev_notifier_info * info)162 switchdev_notifier_info_to_dev(const struct switchdev_notifier_info *info)
163 {
164 	return info->dev;
165 }
166 
167 #ifdef CONFIG_NET_SWITCHDEV
168 
169 void switchdev_deferred_process(void);
170 int switchdev_port_attr_get(struct net_device *dev,
171 			    struct switchdev_attr *attr);
172 int switchdev_port_attr_set(struct net_device *dev,
173 			    const struct switchdev_attr *attr);
174 int switchdev_port_obj_add(struct net_device *dev,
175 			   const struct switchdev_obj *obj);
176 int switchdev_port_obj_del(struct net_device *dev,
177 			   const struct switchdev_obj *obj);
178 int register_switchdev_notifier(struct notifier_block *nb);
179 int unregister_switchdev_notifier(struct notifier_block *nb);
180 int call_switchdev_notifiers(unsigned long val, struct net_device *dev,
181 			     struct switchdev_notifier_info *info);
182 void switchdev_port_fwd_mark_set(struct net_device *dev,
183 				 struct net_device *group_dev,
184 				 bool joining);
185 
186 bool switchdev_port_same_parent_id(struct net_device *a,
187 				   struct net_device *b);
188 
189 #define SWITCHDEV_SET_OPS(netdev, ops) ((netdev)->switchdev_ops = (ops))
190 #else
191 
switchdev_deferred_process(void)192 static inline void switchdev_deferred_process(void)
193 {
194 }
195 
switchdev_port_attr_get(struct net_device * dev,struct switchdev_attr * attr)196 static inline int switchdev_port_attr_get(struct net_device *dev,
197 					  struct switchdev_attr *attr)
198 {
199 	return -EOPNOTSUPP;
200 }
201 
switchdev_port_attr_set(struct net_device * dev,const struct switchdev_attr * attr)202 static inline int switchdev_port_attr_set(struct net_device *dev,
203 					  const struct switchdev_attr *attr)
204 {
205 	return -EOPNOTSUPP;
206 }
207 
switchdev_port_obj_add(struct net_device * dev,const struct switchdev_obj * obj)208 static inline int switchdev_port_obj_add(struct net_device *dev,
209 					 const struct switchdev_obj *obj)
210 {
211 	return -EOPNOTSUPP;
212 }
213 
switchdev_port_obj_del(struct net_device * dev,const struct switchdev_obj * obj)214 static inline int switchdev_port_obj_del(struct net_device *dev,
215 					 const struct switchdev_obj *obj)
216 {
217 	return -EOPNOTSUPP;
218 }
219 
register_switchdev_notifier(struct notifier_block * nb)220 static inline int register_switchdev_notifier(struct notifier_block *nb)
221 {
222 	return 0;
223 }
224 
unregister_switchdev_notifier(struct notifier_block * nb)225 static inline int unregister_switchdev_notifier(struct notifier_block *nb)
226 {
227 	return 0;
228 }
229 
call_switchdev_notifiers(unsigned long val,struct net_device * dev,struct switchdev_notifier_info * info)230 static inline int call_switchdev_notifiers(unsigned long val,
231 					   struct net_device *dev,
232 					   struct switchdev_notifier_info *info)
233 {
234 	return NOTIFY_DONE;
235 }
236 
switchdev_port_same_parent_id(struct net_device * a,struct net_device * b)237 static inline bool switchdev_port_same_parent_id(struct net_device *a,
238 						 struct net_device *b)
239 {
240 	return false;
241 }
242 
243 #define SWITCHDEV_SET_OPS(netdev, ops) do {} while (0)
244 
245 #endif
246 
247 #endif /* _LINUX_SWITCHDEV_H_ */
248