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 enum switchdev_attr_id {
20 SWITCHDEV_ATTR_ID_UNDEFINED,
21 SWITCHDEV_ATTR_ID_PORT_STP_STATE,
22 SWITCHDEV_ATTR_ID_PORT_MST_STATE,
23 SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS,
24 SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS,
25 SWITCHDEV_ATTR_ID_PORT_MROUTER,
26 SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME,
27 SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING,
28 SWITCHDEV_ATTR_ID_BRIDGE_VLAN_PROTOCOL,
29 SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED,
30 SWITCHDEV_ATTR_ID_BRIDGE_MROUTER,
31 SWITCHDEV_ATTR_ID_BRIDGE_MST,
32 SWITCHDEV_ATTR_ID_MRP_PORT_ROLE,
33 SWITCHDEV_ATTR_ID_VLAN_MSTI,
34 };
35
36 struct switchdev_mst_state {
37 u16 msti;
38 u8 state;
39 };
40
41 struct switchdev_brport_flags {
42 unsigned long val;
43 unsigned long mask;
44 };
45
46 struct switchdev_vlan_msti {
47 u16 vid;
48 u16 msti;
49 };
50
51 struct switchdev_attr {
52 struct net_device *orig_dev;
53 enum switchdev_attr_id id;
54 u32 flags;
55 void *complete_priv;
56 void (*complete)(struct net_device *dev, int err, void *priv);
57 union {
58 u8 stp_state; /* PORT_STP_STATE */
59 struct switchdev_mst_state mst_state; /* PORT_MST_STATE */
60 struct switchdev_brport_flags brport_flags; /* PORT_BRIDGE_FLAGS */
61 bool mrouter; /* PORT_MROUTER */
62 clock_t ageing_time; /* BRIDGE_AGEING_TIME */
63 bool vlan_filtering; /* BRIDGE_VLAN_FILTERING */
64 u16 vlan_protocol; /* BRIDGE_VLAN_PROTOCOL */
65 bool mst; /* BRIDGE_MST */
66 bool mc_disabled; /* MC_DISABLED */
67 u8 mrp_port_role; /* MRP_PORT_ROLE */
68 struct switchdev_vlan_msti vlan_msti; /* VLAN_MSTI */
69 } u;
70 };
71
72 enum switchdev_obj_id {
73 SWITCHDEV_OBJ_ID_UNDEFINED,
74 SWITCHDEV_OBJ_ID_PORT_VLAN,
75 SWITCHDEV_OBJ_ID_PORT_MDB,
76 SWITCHDEV_OBJ_ID_HOST_MDB,
77 SWITCHDEV_OBJ_ID_MRP,
78 SWITCHDEV_OBJ_ID_RING_TEST_MRP,
79 SWITCHDEV_OBJ_ID_RING_ROLE_MRP,
80 SWITCHDEV_OBJ_ID_RING_STATE_MRP,
81 SWITCHDEV_OBJ_ID_IN_TEST_MRP,
82 SWITCHDEV_OBJ_ID_IN_ROLE_MRP,
83 SWITCHDEV_OBJ_ID_IN_STATE_MRP,
84 };
85
86 struct switchdev_obj {
87 struct list_head list;
88 struct net_device *orig_dev;
89 enum switchdev_obj_id id;
90 u32 flags;
91 void *complete_priv;
92 void (*complete)(struct net_device *dev, int err, void *priv);
93 };
94
95 /* SWITCHDEV_OBJ_ID_PORT_VLAN */
96 struct switchdev_obj_port_vlan {
97 struct switchdev_obj obj;
98 u16 flags;
99 u16 vid;
100 /* If set, the notifier signifies a change of one of the following
101 * flags for a VLAN that already exists:
102 * - BRIDGE_VLAN_INFO_PVID
103 * - BRIDGE_VLAN_INFO_UNTAGGED
104 * Entries with BRIDGE_VLAN_INFO_BRENTRY unset are not notified at all.
105 */
106 bool changed;
107 };
108
109 #define SWITCHDEV_OBJ_PORT_VLAN(OBJ) \
110 container_of((OBJ), struct switchdev_obj_port_vlan, obj)
111
112 /* SWITCHDEV_OBJ_ID_PORT_MDB */
113 struct switchdev_obj_port_mdb {
114 struct switchdev_obj obj;
115 unsigned char addr[ETH_ALEN];
116 u16 vid;
117 };
118
119 #define SWITCHDEV_OBJ_PORT_MDB(OBJ) \
120 container_of((OBJ), struct switchdev_obj_port_mdb, obj)
121
122
123 /* SWITCHDEV_OBJ_ID_MRP */
124 struct switchdev_obj_mrp {
125 struct switchdev_obj obj;
126 struct net_device *p_port;
127 struct net_device *s_port;
128 u32 ring_id;
129 u16 prio;
130 };
131
132 #define SWITCHDEV_OBJ_MRP(OBJ) \
133 container_of((OBJ), struct switchdev_obj_mrp, obj)
134
135 /* SWITCHDEV_OBJ_ID_RING_TEST_MRP */
136 struct switchdev_obj_ring_test_mrp {
137 struct switchdev_obj obj;
138 /* The value is in us and a value of 0 represents to stop */
139 u32 interval;
140 u8 max_miss;
141 u32 ring_id;
142 u32 period;
143 bool monitor;
144 };
145
146 #define SWITCHDEV_OBJ_RING_TEST_MRP(OBJ) \
147 container_of((OBJ), struct switchdev_obj_ring_test_mrp, obj)
148
149 /* SWICHDEV_OBJ_ID_RING_ROLE_MRP */
150 struct switchdev_obj_ring_role_mrp {
151 struct switchdev_obj obj;
152 u8 ring_role;
153 u32 ring_id;
154 u8 sw_backup;
155 };
156
157 #define SWITCHDEV_OBJ_RING_ROLE_MRP(OBJ) \
158 container_of((OBJ), struct switchdev_obj_ring_role_mrp, obj)
159
160 struct switchdev_obj_ring_state_mrp {
161 struct switchdev_obj obj;
162 u8 ring_state;
163 u32 ring_id;
164 };
165
166 #define SWITCHDEV_OBJ_RING_STATE_MRP(OBJ) \
167 container_of((OBJ), struct switchdev_obj_ring_state_mrp, obj)
168
169 /* SWITCHDEV_OBJ_ID_IN_TEST_MRP */
170 struct switchdev_obj_in_test_mrp {
171 struct switchdev_obj obj;
172 /* The value is in us and a value of 0 represents to stop */
173 u32 interval;
174 u32 in_id;
175 u32 period;
176 u8 max_miss;
177 };
178
179 #define SWITCHDEV_OBJ_IN_TEST_MRP(OBJ) \
180 container_of((OBJ), struct switchdev_obj_in_test_mrp, obj)
181
182 /* SWICHDEV_OBJ_ID_IN_ROLE_MRP */
183 struct switchdev_obj_in_role_mrp {
184 struct switchdev_obj obj;
185 struct net_device *i_port;
186 u32 ring_id;
187 u16 in_id;
188 u8 in_role;
189 u8 sw_backup;
190 };
191
192 #define SWITCHDEV_OBJ_IN_ROLE_MRP(OBJ) \
193 container_of((OBJ), struct switchdev_obj_in_role_mrp, obj)
194
195 struct switchdev_obj_in_state_mrp {
196 struct switchdev_obj obj;
197 u32 in_id;
198 u8 in_state;
199 };
200
201 #define SWITCHDEV_OBJ_IN_STATE_MRP(OBJ) \
202 container_of((OBJ), struct switchdev_obj_in_state_mrp, obj)
203
204 typedef int switchdev_obj_dump_cb_t(struct switchdev_obj *obj);
205
206 struct switchdev_brport {
207 struct net_device *dev;
208 const void *ctx;
209 struct notifier_block *atomic_nb;
210 struct notifier_block *blocking_nb;
211 bool tx_fwd_offload;
212 };
213
214 enum switchdev_notifier_type {
215 SWITCHDEV_FDB_ADD_TO_BRIDGE = 1,
216 SWITCHDEV_FDB_DEL_TO_BRIDGE,
217 SWITCHDEV_FDB_ADD_TO_DEVICE,
218 SWITCHDEV_FDB_DEL_TO_DEVICE,
219 SWITCHDEV_FDB_OFFLOADED,
220 SWITCHDEV_FDB_FLUSH_TO_BRIDGE,
221
222 SWITCHDEV_PORT_OBJ_ADD, /* Blocking. */
223 SWITCHDEV_PORT_OBJ_DEL, /* Blocking. */
224 SWITCHDEV_PORT_ATTR_SET, /* May be blocking . */
225
226 SWITCHDEV_VXLAN_FDB_ADD_TO_BRIDGE,
227 SWITCHDEV_VXLAN_FDB_DEL_TO_BRIDGE,
228 SWITCHDEV_VXLAN_FDB_ADD_TO_DEVICE,
229 SWITCHDEV_VXLAN_FDB_DEL_TO_DEVICE,
230 SWITCHDEV_VXLAN_FDB_OFFLOADED,
231
232 SWITCHDEV_BRPORT_OFFLOADED,
233 SWITCHDEV_BRPORT_UNOFFLOADED,
234 };
235
236 struct switchdev_notifier_info {
237 struct net_device *dev;
238 struct netlink_ext_ack *extack;
239 const void *ctx;
240 };
241
242 struct switchdev_notifier_fdb_info {
243 struct switchdev_notifier_info info; /* must be first */
244 const unsigned char *addr;
245 u16 vid;
246 u8 added_by_user:1,
247 is_local:1,
248 offloaded:1;
249 };
250
251 struct switchdev_notifier_port_obj_info {
252 struct switchdev_notifier_info info; /* must be first */
253 const struct switchdev_obj *obj;
254 bool handled;
255 };
256
257 struct switchdev_notifier_port_attr_info {
258 struct switchdev_notifier_info info; /* must be first */
259 const struct switchdev_attr *attr;
260 bool handled;
261 };
262
263 struct switchdev_notifier_brport_info {
264 struct switchdev_notifier_info info; /* must be first */
265 const struct switchdev_brport brport;
266 };
267
268 static inline struct net_device *
switchdev_notifier_info_to_dev(const struct switchdev_notifier_info * info)269 switchdev_notifier_info_to_dev(const struct switchdev_notifier_info *info)
270 {
271 return info->dev;
272 }
273
274 static inline struct netlink_ext_ack *
switchdev_notifier_info_to_extack(const struct switchdev_notifier_info * info)275 switchdev_notifier_info_to_extack(const struct switchdev_notifier_info *info)
276 {
277 return info->extack;
278 }
279
280 static inline bool
switchdev_fdb_is_dynamically_learned(const struct switchdev_notifier_fdb_info * fdb_info)281 switchdev_fdb_is_dynamically_learned(const struct switchdev_notifier_fdb_info *fdb_info)
282 {
283 return !fdb_info->added_by_user && !fdb_info->is_local;
284 }
285
286 #ifdef CONFIG_NET_SWITCHDEV
287
288 int switchdev_bridge_port_offload(struct net_device *brport_dev,
289 struct net_device *dev, const void *ctx,
290 struct notifier_block *atomic_nb,
291 struct notifier_block *blocking_nb,
292 bool tx_fwd_offload,
293 struct netlink_ext_ack *extack);
294 void switchdev_bridge_port_unoffload(struct net_device *brport_dev,
295 const void *ctx,
296 struct notifier_block *atomic_nb,
297 struct notifier_block *blocking_nb);
298
299 void switchdev_deferred_process(void);
300 int switchdev_port_attr_set(struct net_device *dev,
301 const struct switchdev_attr *attr,
302 struct netlink_ext_ack *extack);
303 int switchdev_port_obj_add(struct net_device *dev,
304 const struct switchdev_obj *obj,
305 struct netlink_ext_ack *extack);
306 int switchdev_port_obj_del(struct net_device *dev,
307 const struct switchdev_obj *obj);
308
309 int register_switchdev_notifier(struct notifier_block *nb);
310 int unregister_switchdev_notifier(struct notifier_block *nb);
311 int call_switchdev_notifiers(unsigned long val, struct net_device *dev,
312 struct switchdev_notifier_info *info,
313 struct netlink_ext_ack *extack);
314
315 int register_switchdev_blocking_notifier(struct notifier_block *nb);
316 int unregister_switchdev_blocking_notifier(struct notifier_block *nb);
317 int call_switchdev_blocking_notifiers(unsigned long val, struct net_device *dev,
318 struct switchdev_notifier_info *info,
319 struct netlink_ext_ack *extack);
320
321 void switchdev_port_fwd_mark_set(struct net_device *dev,
322 struct net_device *group_dev,
323 bool joining);
324
325 int switchdev_handle_fdb_event_to_device(struct net_device *dev, unsigned long event,
326 const struct switchdev_notifier_fdb_info *fdb_info,
327 bool (*check_cb)(const struct net_device *dev),
328 bool (*foreign_dev_check_cb)(const struct net_device *dev,
329 const struct net_device *foreign_dev),
330 int (*mod_cb)(struct net_device *dev, struct net_device *orig_dev,
331 unsigned long event, const void *ctx,
332 const struct switchdev_notifier_fdb_info *fdb_info));
333
334 int switchdev_handle_port_obj_add(struct net_device *dev,
335 struct switchdev_notifier_port_obj_info *port_obj_info,
336 bool (*check_cb)(const struct net_device *dev),
337 int (*add_cb)(struct net_device *dev, const void *ctx,
338 const struct switchdev_obj *obj,
339 struct netlink_ext_ack *extack));
340 int switchdev_handle_port_obj_add_foreign(struct net_device *dev,
341 struct switchdev_notifier_port_obj_info *port_obj_info,
342 bool (*check_cb)(const struct net_device *dev),
343 bool (*foreign_dev_check_cb)(const struct net_device *dev,
344 const struct net_device *foreign_dev),
345 int (*add_cb)(struct net_device *dev, const void *ctx,
346 const struct switchdev_obj *obj,
347 struct netlink_ext_ack *extack));
348 int switchdev_handle_port_obj_del(struct net_device *dev,
349 struct switchdev_notifier_port_obj_info *port_obj_info,
350 bool (*check_cb)(const struct net_device *dev),
351 int (*del_cb)(struct net_device *dev, const void *ctx,
352 const struct switchdev_obj *obj));
353 int switchdev_handle_port_obj_del_foreign(struct net_device *dev,
354 struct switchdev_notifier_port_obj_info *port_obj_info,
355 bool (*check_cb)(const struct net_device *dev),
356 bool (*foreign_dev_check_cb)(const struct net_device *dev,
357 const struct net_device *foreign_dev),
358 int (*del_cb)(struct net_device *dev, const void *ctx,
359 const struct switchdev_obj *obj));
360
361 int switchdev_handle_port_attr_set(struct net_device *dev,
362 struct switchdev_notifier_port_attr_info *port_attr_info,
363 bool (*check_cb)(const struct net_device *dev),
364 int (*set_cb)(struct net_device *dev, const void *ctx,
365 const struct switchdev_attr *attr,
366 struct netlink_ext_ack *extack));
367 #else
368
369 static inline int
switchdev_bridge_port_offload(struct net_device * brport_dev,struct net_device * dev,const void * ctx,struct notifier_block * atomic_nb,struct notifier_block * blocking_nb,bool tx_fwd_offload,struct netlink_ext_ack * extack)370 switchdev_bridge_port_offload(struct net_device *brport_dev,
371 struct net_device *dev, const void *ctx,
372 struct notifier_block *atomic_nb,
373 struct notifier_block *blocking_nb,
374 bool tx_fwd_offload,
375 struct netlink_ext_ack *extack)
376 {
377 return -EOPNOTSUPP;
378 }
379
380 static inline void
switchdev_bridge_port_unoffload(struct net_device * brport_dev,const void * ctx,struct notifier_block * atomic_nb,struct notifier_block * blocking_nb)381 switchdev_bridge_port_unoffload(struct net_device *brport_dev,
382 const void *ctx,
383 struct notifier_block *atomic_nb,
384 struct notifier_block *blocking_nb)
385 {
386 }
387
switchdev_deferred_process(void)388 static inline void switchdev_deferred_process(void)
389 {
390 }
391
switchdev_port_attr_set(struct net_device * dev,const struct switchdev_attr * attr,struct netlink_ext_ack * extack)392 static inline int switchdev_port_attr_set(struct net_device *dev,
393 const struct switchdev_attr *attr,
394 struct netlink_ext_ack *extack)
395 {
396 return -EOPNOTSUPP;
397 }
398
switchdev_port_obj_add(struct net_device * dev,const struct switchdev_obj * obj,struct netlink_ext_ack * extack)399 static inline int switchdev_port_obj_add(struct net_device *dev,
400 const struct switchdev_obj *obj,
401 struct netlink_ext_ack *extack)
402 {
403 return -EOPNOTSUPP;
404 }
405
switchdev_port_obj_del(struct net_device * dev,const struct switchdev_obj * obj)406 static inline int switchdev_port_obj_del(struct net_device *dev,
407 const struct switchdev_obj *obj)
408 {
409 return -EOPNOTSUPP;
410 }
411
register_switchdev_notifier(struct notifier_block * nb)412 static inline int register_switchdev_notifier(struct notifier_block *nb)
413 {
414 return 0;
415 }
416
unregister_switchdev_notifier(struct notifier_block * nb)417 static inline int unregister_switchdev_notifier(struct notifier_block *nb)
418 {
419 return 0;
420 }
421
call_switchdev_notifiers(unsigned long val,struct net_device * dev,struct switchdev_notifier_info * info,struct netlink_ext_ack * extack)422 static inline int call_switchdev_notifiers(unsigned long val,
423 struct net_device *dev,
424 struct switchdev_notifier_info *info,
425 struct netlink_ext_ack *extack)
426 {
427 return NOTIFY_DONE;
428 }
429
430 static inline int
register_switchdev_blocking_notifier(struct notifier_block * nb)431 register_switchdev_blocking_notifier(struct notifier_block *nb)
432 {
433 return 0;
434 }
435
436 static inline int
unregister_switchdev_blocking_notifier(struct notifier_block * nb)437 unregister_switchdev_blocking_notifier(struct notifier_block *nb)
438 {
439 return 0;
440 }
441
442 static inline int
call_switchdev_blocking_notifiers(unsigned long val,struct net_device * dev,struct switchdev_notifier_info * info,struct netlink_ext_ack * extack)443 call_switchdev_blocking_notifiers(unsigned long val,
444 struct net_device *dev,
445 struct switchdev_notifier_info *info,
446 struct netlink_ext_ack *extack)
447 {
448 return NOTIFY_DONE;
449 }
450
451 static inline int
switchdev_handle_fdb_event_to_device(struct net_device * dev,unsigned long event,const struct switchdev_notifier_fdb_info * fdb_info,bool (* check_cb)(const struct net_device * dev),bool (* foreign_dev_check_cb)(const struct net_device * dev,const struct net_device * foreign_dev),int (* mod_cb)(struct net_device * dev,struct net_device * orig_dev,unsigned long event,const void * ctx,const struct switchdev_notifier_fdb_info * fdb_info))452 switchdev_handle_fdb_event_to_device(struct net_device *dev, unsigned long event,
453 const struct switchdev_notifier_fdb_info *fdb_info,
454 bool (*check_cb)(const struct net_device *dev),
455 bool (*foreign_dev_check_cb)(const struct net_device *dev,
456 const struct net_device *foreign_dev),
457 int (*mod_cb)(struct net_device *dev, struct net_device *orig_dev,
458 unsigned long event, const void *ctx,
459 const struct switchdev_notifier_fdb_info *fdb_info))
460 {
461 return 0;
462 }
463
464 static inline int
switchdev_handle_port_obj_add(struct net_device * dev,struct switchdev_notifier_port_obj_info * port_obj_info,bool (* check_cb)(const struct net_device * dev),int (* add_cb)(struct net_device * dev,const void * ctx,const struct switchdev_obj * obj,struct netlink_ext_ack * extack))465 switchdev_handle_port_obj_add(struct net_device *dev,
466 struct switchdev_notifier_port_obj_info *port_obj_info,
467 bool (*check_cb)(const struct net_device *dev),
468 int (*add_cb)(struct net_device *dev, const void *ctx,
469 const struct switchdev_obj *obj,
470 struct netlink_ext_ack *extack))
471 {
472 return 0;
473 }
474
switchdev_handle_port_obj_add_foreign(struct net_device * dev,struct switchdev_notifier_port_obj_info * port_obj_info,bool (* check_cb)(const struct net_device * dev),bool (* foreign_dev_check_cb)(const struct net_device * dev,const struct net_device * foreign_dev),int (* add_cb)(struct net_device * dev,const void * ctx,const struct switchdev_obj * obj,struct netlink_ext_ack * extack))475 static inline int switchdev_handle_port_obj_add_foreign(struct net_device *dev,
476 struct switchdev_notifier_port_obj_info *port_obj_info,
477 bool (*check_cb)(const struct net_device *dev),
478 bool (*foreign_dev_check_cb)(const struct net_device *dev,
479 const struct net_device *foreign_dev),
480 int (*add_cb)(struct net_device *dev, const void *ctx,
481 const struct switchdev_obj *obj,
482 struct netlink_ext_ack *extack))
483 {
484 return 0;
485 }
486
487 static inline int
switchdev_handle_port_obj_del(struct net_device * dev,struct switchdev_notifier_port_obj_info * port_obj_info,bool (* check_cb)(const struct net_device * dev),int (* del_cb)(struct net_device * dev,const void * ctx,const struct switchdev_obj * obj))488 switchdev_handle_port_obj_del(struct net_device *dev,
489 struct switchdev_notifier_port_obj_info *port_obj_info,
490 bool (*check_cb)(const struct net_device *dev),
491 int (*del_cb)(struct net_device *dev, const void *ctx,
492 const struct switchdev_obj *obj))
493 {
494 return 0;
495 }
496
497 static inline int
switchdev_handle_port_obj_del_foreign(struct net_device * dev,struct switchdev_notifier_port_obj_info * port_obj_info,bool (* check_cb)(const struct net_device * dev),bool (* foreign_dev_check_cb)(const struct net_device * dev,const struct net_device * foreign_dev),int (* del_cb)(struct net_device * dev,const void * ctx,const struct switchdev_obj * obj))498 switchdev_handle_port_obj_del_foreign(struct net_device *dev,
499 struct switchdev_notifier_port_obj_info *port_obj_info,
500 bool (*check_cb)(const struct net_device *dev),
501 bool (*foreign_dev_check_cb)(const struct net_device *dev,
502 const struct net_device *foreign_dev),
503 int (*del_cb)(struct net_device *dev, const void *ctx,
504 const struct switchdev_obj *obj))
505 {
506 return 0;
507 }
508
509 static inline int
switchdev_handle_port_attr_set(struct net_device * dev,struct switchdev_notifier_port_attr_info * port_attr_info,bool (* check_cb)(const struct net_device * dev),int (* set_cb)(struct net_device * dev,const void * ctx,const struct switchdev_attr * attr,struct netlink_ext_ack * extack))510 switchdev_handle_port_attr_set(struct net_device *dev,
511 struct switchdev_notifier_port_attr_info *port_attr_info,
512 bool (*check_cb)(const struct net_device *dev),
513 int (*set_cb)(struct net_device *dev, const void *ctx,
514 const struct switchdev_attr *attr,
515 struct netlink_ext_ack *extack))
516 {
517 return 0;
518 }
519 #endif
520
521 #endif /* _LINUX_SWITCHDEV_H_ */
522