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