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
23struct switchdev_trans {
24 bool ph_prepare;
25};
26
27static inline bool switchdev_trans_ph_prepare(struct switchdev_trans *trans)
28{
29 return trans && trans->ph_prepare;
30}
31
32static inline bool switchdev_trans_ph_commit(struct switchdev_trans *trans)
33{
34 return trans && !trans->ph_prepare;
35}
36
37enum switchdev_attr_id {
38 SWITCHDEV_ATTR_ID_UNDEFINED,
39 SWITCHDEV_ATTR_ID_PORT_STP_STATE,
40 SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS,
41 SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS,
42 SWITCHDEV_ATTR_ID_PORT_MROUTER,
43 SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME,
44 SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING,
45 SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED,
46 SWITCHDEV_ATTR_ID_BRIDGE_MROUTER,
47};
48
49struct switchdev_attr {
50 struct net_device *orig_dev;
51 enum switchdev_attr_id id;
52 u32 flags;
53 void *complete_priv;
54 void (*complete)(struct net_device *dev, int err, void *priv);
55 union {
56 u8 stp_state; /* PORT_STP_STATE */
57 unsigned long brport_flags; /* PORT_{PRE}_BRIDGE_FLAGS */
58 bool mrouter; /* PORT_MROUTER */
59 clock_t ageing_time; /* BRIDGE_AGEING_TIME */
60 bool vlan_filtering; /* BRIDGE_VLAN_FILTERING */
61 bool mc_disabled; /* MC_DISABLED */
62 } u;
63};
64
65enum switchdev_obj_id {
66 SWITCHDEV_OBJ_ID_UNDEFINED,
67 SWITCHDEV_OBJ_ID_PORT_VLAN,
68 SWITCHDEV_OBJ_ID_PORT_MDB,
69 SWITCHDEV_OBJ_ID_HOST_MDB,
70};
71
72struct switchdev_obj {
73 struct net_device *orig_dev;
74 enum switchdev_obj_id id;
75 u32 flags;
76 void *complete_priv;
77 void (*complete)(struct net_device *dev, int err, void *priv);
78};
79
80/* SWITCHDEV_OBJ_ID_PORT_VLAN */
81struct switchdev_obj_port_vlan {
82 struct switchdev_obj obj;
83 u16 flags;
84 u16 vid_begin;
85 u16 vid_end;
86};
87
88#define SWITCHDEV_OBJ_PORT_VLAN(OBJ) \
89 container_of((OBJ), struct switchdev_obj_port_vlan, obj)
90
91/* SWITCHDEV_OBJ_ID_PORT_MDB */
92struct switchdev_obj_port_mdb {
93 struct switchdev_obj obj;
94 unsigned char addr[ETH_ALEN];
95 u16 vid;
96};
97
98#define SWITCHDEV_OBJ_PORT_MDB(OBJ) \
99 container_of((OBJ), struct switchdev_obj_port_mdb, obj)
100
101typedef int switchdev_obj_dump_cb_t(struct switchdev_obj *obj);
102
103enum switchdev_notifier_type {
104 SWITCHDEV_FDB_ADD_TO_BRIDGE = 1,
105 SWITCHDEV_FDB_DEL_TO_BRIDGE,
106 SWITCHDEV_FDB_ADD_TO_DEVICE,
107 SWITCHDEV_FDB_DEL_TO_DEVICE,
108 SWITCHDEV_FDB_OFFLOADED,
109
110 SWITCHDEV_PORT_OBJ_ADD, /* Blocking. */
111 SWITCHDEV_PORT_OBJ_DEL, /* Blocking. */
112 SWITCHDEV_PORT_ATTR_SET, /* May be blocking . */
113
114 SWITCHDEV_VXLAN_FDB_ADD_TO_BRIDGE,
115 SWITCHDEV_VXLAN_FDB_DEL_TO_BRIDGE,
116 SWITCHDEV_VXLAN_FDB_ADD_TO_DEVICE,
117 SWITCHDEV_VXLAN_FDB_DEL_TO_DEVICE,
118 SWITCHDEV_VXLAN_FDB_OFFLOADED,
119};
120
121struct switchdev_notifier_info {
122 struct net_device *dev;
123 struct netlink_ext_ack *extack;
124};
125
126struct switchdev_notifier_fdb_info {
127 struct switchdev_notifier_info info; /* must be first */
128 const unsigned char *addr;
129 u16 vid;
130 u8 added_by_user:1,
131 offloaded:1;
132};
133
134struct switchdev_notifier_port_obj_info {
135 struct switchdev_notifier_info info; /* must be first */
136 const struct switchdev_obj *obj;
137 struct switchdev_trans *trans;
138 bool handled;
139};
140
141struct switchdev_notifier_port_attr_info {
142 struct switchdev_notifier_info info; /* must be first */
143 const struct switchdev_attr *attr;
144 struct switchdev_trans *trans;
145 bool handled;
146};
147
148static inline struct net_device *
149switchdev_notifier_info_to_dev(const struct switchdev_notifier_info *info)
150{
151 return info->dev;
152}
153
154static inline struct netlink_ext_ack *
155switchdev_notifier_info_to_extack(const struct switchdev_notifier_info *info)
156{
157 return info->extack;
158}
159
160#ifdef CONFIG_NET_SWITCHDEV
161
162void switchdev_deferred_process(void);
163int switchdev_port_attr_set(struct net_device *dev,
164 const struct switchdev_attr *attr);
165int switchdev_port_obj_add(struct net_device *dev,
166 const struct switchdev_obj *obj,
167 struct netlink_ext_ack *extack);
168int switchdev_port_obj_del(struct net_device *dev,
169 const struct switchdev_obj *obj);
170
171int register_switchdev_notifier(struct notifier_block *nb);
172int unregister_switchdev_notifier(struct notifier_block *nb);
173int call_switchdev_notifiers(unsigned long val, struct net_device *dev,
174 struct switchdev_notifier_info *info,
175 struct netlink_ext_ack *extack);
176
177int register_switchdev_blocking_notifier(struct notifier_block *nb);
178int unregister_switchdev_blocking_notifier(struct notifier_block *nb);
179int call_switchdev_blocking_notifiers(unsigned long val, struct net_device *dev,
180 struct switchdev_notifier_info *info,
181 struct netlink_ext_ack *extack);
182
183void switchdev_port_fwd_mark_set(struct net_device *dev,
184 struct net_device *group_dev,
185 bool joining);
186
187int switchdev_handle_port_obj_add(struct net_device *dev,
188 struct switchdev_notifier_port_obj_info *port_obj_info,
189 bool (*check_cb)(const struct net_device *dev),
190 int (*add_cb)(struct net_device *dev,
191 const struct switchdev_obj *obj,
192 struct switchdev_trans *trans,
193 struct netlink_ext_ack *extack));
194int switchdev_handle_port_obj_del(struct net_device *dev,
195 struct switchdev_notifier_port_obj_info *port_obj_info,
196 bool (*check_cb)(const struct net_device *dev),
197 int (*del_cb)(struct net_device *dev,
198 const struct switchdev_obj *obj));
199
200int switchdev_handle_port_attr_set(struct net_device *dev,
201 struct switchdev_notifier_port_attr_info *port_attr_info,
202 bool (*check_cb)(const struct net_device *dev),
203 int (*set_cb)(struct net_device *dev,
204 const struct switchdev_attr *attr,
205 struct switchdev_trans *trans));
206#else
207
208static inline void switchdev_deferred_process(void)
209{
210}
211
212static inline int switchdev_port_attr_set(struct net_device *dev,
213 const struct switchdev_attr *attr)
214{
215 return -EOPNOTSUPP;
216}
217
218static inline int switchdev_port_obj_add(struct net_device *dev,
219 const struct switchdev_obj *obj,
220 struct netlink_ext_ack *extack)
221{
222 return -EOPNOTSUPP;
223}
224
225static inline int switchdev_port_obj_del(struct net_device *dev,
226 const struct switchdev_obj *obj)
227{
228 return -EOPNOTSUPP;
229}
230
231static inline int register_switchdev_notifier(struct notifier_block *nb)
232{
233 return 0;
234}
235
236static inline int unregister_switchdev_notifier(struct notifier_block *nb)
237{
238 return 0;
239}
240
241static inline int call_switchdev_notifiers(unsigned long val,
242 struct net_device *dev,
243 struct switchdev_notifier_info *info,
244 struct netlink_ext_ack *extack)
245{
246 return NOTIFY_DONE;
247}
248
249static inline int
250register_switchdev_blocking_notifier(struct notifier_block *nb)
251{
252 return 0;
253}
254
255static inline int
256unregister_switchdev_blocking_notifier(struct notifier_block *nb)
257{
258 return 0;
259}
260
261static inline int
262call_switchdev_blocking_notifiers(unsigned long val,
263 struct net_device *dev,
264 struct switchdev_notifier_info *info,
265 struct netlink_ext_ack *extack)
266{
267 return NOTIFY_DONE;
268}
269
270static inline int
271switchdev_handle_port_obj_add(struct net_device *dev,
272 struct switchdev_notifier_port_obj_info *port_obj_info,
273 bool (*check_cb)(const struct net_device *dev),
274 int (*add_cb)(struct net_device *dev,
275 const struct switchdev_obj *obj,
276 struct switchdev_trans *trans,
277 struct netlink_ext_ack *extack))
278{
279 return 0;
280}
281
282static inline int
283switchdev_handle_port_obj_del(struct net_device *dev,
284 struct switchdev_notifier_port_obj_info *port_obj_info,
285 bool (*check_cb)(const struct net_device *dev),
286 int (*del_cb)(struct net_device *dev,
287 const struct switchdev_obj *obj))
288{
289 return 0;
290}
291
292static inline int
293switchdev_handle_port_attr_set(struct net_device *dev,
294 struct switchdev_notifier_port_attr_info *port_attr_info,
295 bool (*check_cb)(const struct net_device *dev),
296 int (*set_cb)(struct net_device *dev,
297 const struct switchdev_attr *attr,
298 struct switchdev_trans *trans))
299{
300 return 0;
301}
302#endif
303
304#endif /* _LINUX_SWITCHDEV_H_ */
305