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Linux/include/net/switchdev.h

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  1 /* SPDX-License-Identifier: GPL-2.0-or-later */
  2 /*
  3  * include/net/switchdev.h - Switch device API
  4  * Copyright (c) 2014-2015 Jiri Pirko <jiri@resnulli.us>
  5  * Copyright (c) 2014-2015 Scott Feldman <sfeldma@gmail.com>
  6  */
  7 #ifndef _LINUX_SWITCHDEV_H_
  8 #define _LINUX_SWITCHDEV_H_
  9 
 10 #include <linux/netdevice.h>
 11 #include <linux/notifier.h>
 12 #include <linux/list.h>
 13 #include <net/ip_fib.h>
 14 
 15 #define SWITCHDEV_F_NO_RECURSE          BIT(0)
 16 #define SWITCHDEV_F_SKIP_EOPNOTSUPP     BIT(1)
 17 #define SWITCHDEV_F_DEFER               BIT(2)
 18 
 19 struct switchdev_trans {
 20         bool ph_prepare;
 21 };
 22 
 23 static inline bool switchdev_trans_ph_prepare(struct switchdev_trans *trans)
 24 {
 25         return trans && trans->ph_prepare;
 26 }
 27 
 28 static inline bool switchdev_trans_ph_commit(struct switchdev_trans *trans)
 29 {
 30         return trans && !trans->ph_prepare;
 31 }
 32 
 33 enum switchdev_attr_id {
 34         SWITCHDEV_ATTR_ID_UNDEFINED,
 35         SWITCHDEV_ATTR_ID_PORT_STP_STATE,
 36         SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS,
 37         SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS,
 38         SWITCHDEV_ATTR_ID_PORT_MROUTER,
 39         SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME,
 40         SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING,
 41         SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED,
 42         SWITCHDEV_ATTR_ID_BRIDGE_MROUTER,
 43 };
 44 
 45 struct switchdev_attr {
 46         struct net_device *orig_dev;
 47         enum switchdev_attr_id id;
 48         u32 flags;
 49         void *complete_priv;
 50         void (*complete)(struct net_device *dev, int err, void *priv);
 51         union {
 52                 u8 stp_state;                           /* PORT_STP_STATE */
 53                 unsigned long brport_flags;             /* PORT_{PRE}_BRIDGE_FLAGS */
 54                 bool mrouter;                           /* PORT_MROUTER */
 55                 clock_t ageing_time;                    /* BRIDGE_AGEING_TIME */
 56                 bool vlan_filtering;                    /* BRIDGE_VLAN_FILTERING */
 57                 bool mc_disabled;                       /* MC_DISABLED */
 58         } u;
 59 };
 60 
 61 enum switchdev_obj_id {
 62         SWITCHDEV_OBJ_ID_UNDEFINED,
 63         SWITCHDEV_OBJ_ID_PORT_VLAN,
 64         SWITCHDEV_OBJ_ID_PORT_MDB,
 65         SWITCHDEV_OBJ_ID_HOST_MDB,
 66 };
 67 
 68 struct switchdev_obj {
 69         struct net_device *orig_dev;
 70         enum switchdev_obj_id id;
 71         u32 flags;
 72         void *complete_priv;
 73         void (*complete)(struct net_device *dev, int err, void *priv);
 74 };
 75 
 76 /* SWITCHDEV_OBJ_ID_PORT_VLAN */
 77 struct switchdev_obj_port_vlan {
 78         struct switchdev_obj obj;
 79         u16 flags;
 80         u16 vid_begin;
 81         u16 vid_end;
 82 };
 83 
 84 #define SWITCHDEV_OBJ_PORT_VLAN(OBJ) \
 85         container_of((OBJ), struct switchdev_obj_port_vlan, obj)
 86 
 87 /* SWITCHDEV_OBJ_ID_PORT_MDB */
 88 struct switchdev_obj_port_mdb {
 89         struct switchdev_obj obj;
 90         unsigned char addr[ETH_ALEN];
 91         u16 vid;
 92 };
 93 
 94 #define SWITCHDEV_OBJ_PORT_MDB(OBJ) \
 95         container_of((OBJ), struct switchdev_obj_port_mdb, obj)
 96 
 97 typedef int switchdev_obj_dump_cb_t(struct switchdev_obj *obj);
 98 
 99 enum switchdev_notifier_type {
100         SWITCHDEV_FDB_ADD_TO_BRIDGE = 1,
101         SWITCHDEV_FDB_DEL_TO_BRIDGE,
102         SWITCHDEV_FDB_ADD_TO_DEVICE,
103         SWITCHDEV_FDB_DEL_TO_DEVICE,
104         SWITCHDEV_FDB_OFFLOADED,
105 
106         SWITCHDEV_PORT_OBJ_ADD, /* Blocking. */
107         SWITCHDEV_PORT_OBJ_DEL, /* Blocking. */
108         SWITCHDEV_PORT_ATTR_SET, /* May be blocking . */
109 
110         SWITCHDEV_VXLAN_FDB_ADD_TO_BRIDGE,
111         SWITCHDEV_VXLAN_FDB_DEL_TO_BRIDGE,
112         SWITCHDEV_VXLAN_FDB_ADD_TO_DEVICE,
113         SWITCHDEV_VXLAN_FDB_DEL_TO_DEVICE,
114         SWITCHDEV_VXLAN_FDB_OFFLOADED,
115 };
116 
117 struct switchdev_notifier_info {
118         struct net_device *dev;
119         struct netlink_ext_ack *extack;
120 };
121 
122 struct switchdev_notifier_fdb_info {
123         struct switchdev_notifier_info info; /* must be first */
124         const unsigned char *addr;
125         u16 vid;
126         u8 added_by_user:1,
127            offloaded:1;
128 };
129 
130 struct switchdev_notifier_port_obj_info {
131         struct switchdev_notifier_info info; /* must be first */
132         const struct switchdev_obj *obj;
133         struct switchdev_trans *trans;
134         bool handled;
135 };
136 
137 struct switchdev_notifier_port_attr_info {
138         struct switchdev_notifier_info info; /* must be first */
139         const struct switchdev_attr *attr;
140         struct switchdev_trans *trans;
141         bool handled;
142 };
143 
144 static inline struct net_device *
145 switchdev_notifier_info_to_dev(const struct switchdev_notifier_info *info)
146 {
147         return info->dev;
148 }
149 
150 static inline struct netlink_ext_ack *
151 switchdev_notifier_info_to_extack(const struct switchdev_notifier_info *info)
152 {
153         return info->extack;
154 }
155 
156 #ifdef CONFIG_NET_SWITCHDEV
157 
158 void switchdev_deferred_process(void);
159 int switchdev_port_attr_set(struct net_device *dev,
160                             const struct switchdev_attr *attr);
161 int switchdev_port_obj_add(struct net_device *dev,
162                            const struct switchdev_obj *obj,
163                            struct netlink_ext_ack *extack);
164 int switchdev_port_obj_del(struct net_device *dev,
165                            const struct switchdev_obj *obj);
166 
167 int register_switchdev_notifier(struct notifier_block *nb);
168 int unregister_switchdev_notifier(struct notifier_block *nb);
169 int call_switchdev_notifiers(unsigned long val, struct net_device *dev,
170                              struct switchdev_notifier_info *info,
171                              struct netlink_ext_ack *extack);
172 
173 int register_switchdev_blocking_notifier(struct notifier_block *nb);
174 int unregister_switchdev_blocking_notifier(struct notifier_block *nb);
175 int call_switchdev_blocking_notifiers(unsigned long val, struct net_device *dev,
176                                       struct switchdev_notifier_info *info,
177                                       struct netlink_ext_ack *extack);
178 
179 void switchdev_port_fwd_mark_set(struct net_device *dev,
180                                  struct net_device *group_dev,
181                                  bool joining);
182 
183 int switchdev_handle_port_obj_add(struct net_device *dev,
184                         struct switchdev_notifier_port_obj_info *port_obj_info,
185                         bool (*check_cb)(const struct net_device *dev),
186                         int (*add_cb)(struct net_device *dev,
187                                       const struct switchdev_obj *obj,
188                                       struct switchdev_trans *trans,
189                                       struct netlink_ext_ack *extack));
190 int switchdev_handle_port_obj_del(struct net_device *dev,
191                         struct switchdev_notifier_port_obj_info *port_obj_info,
192                         bool (*check_cb)(const struct net_device *dev),
193                         int (*del_cb)(struct net_device *dev,
194                                       const struct switchdev_obj *obj));
195 
196 int switchdev_handle_port_attr_set(struct net_device *dev,
197                         struct switchdev_notifier_port_attr_info *port_attr_info,
198                         bool (*check_cb)(const struct net_device *dev),
199                         int (*set_cb)(struct net_device *dev,
200                                       const struct switchdev_attr *attr,
201                                       struct switchdev_trans *trans));
202 #else
203 
204 static inline void switchdev_deferred_process(void)
205 {
206 }
207 
208 static inline int switchdev_port_attr_set(struct net_device *dev,
209                                           const struct switchdev_attr *attr)
210 {
211         return -EOPNOTSUPP;
212 }
213 
214 static inline int switchdev_port_obj_add(struct net_device *dev,
215                                          const struct switchdev_obj *obj,
216                                          struct netlink_ext_ack *extack)
217 {
218         return -EOPNOTSUPP;
219 }
220 
221 static inline int switchdev_port_obj_del(struct net_device *dev,
222                                          const struct switchdev_obj *obj)
223 {
224         return -EOPNOTSUPP;
225 }
226 
227 static inline int register_switchdev_notifier(struct notifier_block *nb)
228 {
229         return 0;
230 }
231 
232 static inline int unregister_switchdev_notifier(struct notifier_block *nb)
233 {
234         return 0;
235 }
236 
237 static inline int call_switchdev_notifiers(unsigned long val,
238                                            struct net_device *dev,
239                                            struct switchdev_notifier_info *info,
240                                            struct netlink_ext_ack *extack)
241 {
242         return NOTIFY_DONE;
243 }
244 
245 static inline int
246 register_switchdev_blocking_notifier(struct notifier_block *nb)
247 {
248         return 0;
249 }
250 
251 static inline int
252 unregister_switchdev_blocking_notifier(struct notifier_block *nb)
253 {
254         return 0;
255 }
256 
257 static inline int
258 call_switchdev_blocking_notifiers(unsigned long val,
259                                   struct net_device *dev,
260                                   struct switchdev_notifier_info *info,
261                                   struct netlink_ext_ack *extack)
262 {
263         return NOTIFY_DONE;
264 }
265 
266 static inline int
267 switchdev_handle_port_obj_add(struct net_device *dev,
268                         struct switchdev_notifier_port_obj_info *port_obj_info,
269                         bool (*check_cb)(const struct net_device *dev),
270                         int (*add_cb)(struct net_device *dev,
271                                       const struct switchdev_obj *obj,
272                                       struct switchdev_trans *trans,
273                                       struct netlink_ext_ack *extack))
274 {
275         return 0;
276 }
277 
278 static inline int
279 switchdev_handle_port_obj_del(struct net_device *dev,
280                         struct switchdev_notifier_port_obj_info *port_obj_info,
281                         bool (*check_cb)(const struct net_device *dev),
282                         int (*del_cb)(struct net_device *dev,
283                                       const struct switchdev_obj *obj))
284 {
285         return 0;
286 }
287 
288 static inline int
289 switchdev_handle_port_attr_set(struct net_device *dev,
290                         struct switchdev_notifier_port_attr_info *port_attr_info,
291                         bool (*check_cb)(const struct net_device *dev),
292                         int (*set_cb)(struct net_device *dev,
293                                       const struct switchdev_attr *attr,
294                                       struct switchdev_trans *trans))
295 {
296         return 0;
297 }
298 #endif
299 
300 #endif /* _LINUX_SWITCHDEV_H_ */
301 

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