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 /* Remember to update br_switchdev_fdb_populate() when adding
243 * new members to this structure
244 */
245 struct switchdev_notifier_fdb_info {
246 struct switchdev_notifier_info info; /* must be first */
247 const unsigned char *addr;
248 u16 vid;
249 u8 added_by_user:1,
250 is_local:1,
251 offloaded:1;
252 };
253
254 struct switchdev_notifier_port_obj_info {
255 struct switchdev_notifier_info info; /* must be first */
256 const struct switchdev_obj *obj;
257 bool handled;
258 };
259
260 struct switchdev_notifier_port_attr_info {
261 struct switchdev_notifier_info info; /* must be first */
262 const struct switchdev_attr *attr;
263 bool handled;
264 };
265
266 struct switchdev_notifier_brport_info {
267 struct switchdev_notifier_info info; /* must be first */
268 const struct switchdev_brport brport;
269 };
270
271 static inline struct net_device *
switchdev_notifier_info_to_dev(const struct switchdev_notifier_info * info)272 switchdev_notifier_info_to_dev(const struct switchdev_notifier_info *info)
273 {
274 return info->dev;
275 }
276
277 static inline struct netlink_ext_ack *
switchdev_notifier_info_to_extack(const struct switchdev_notifier_info * info)278 switchdev_notifier_info_to_extack(const struct switchdev_notifier_info *info)
279 {
280 return info->extack;
281 }
282
283 static inline bool
switchdev_fdb_is_dynamically_learned(const struct switchdev_notifier_fdb_info * fdb_info)284 switchdev_fdb_is_dynamically_learned(const struct switchdev_notifier_fdb_info *fdb_info)
285 {
286 return !fdb_info->added_by_user && !fdb_info->is_local;
287 }
288
289 #ifdef CONFIG_NET_SWITCHDEV
290
291 int switchdev_bridge_port_offload(struct net_device *brport_dev,
292 struct net_device *dev, const void *ctx,
293 struct notifier_block *atomic_nb,
294 struct notifier_block *blocking_nb,
295 bool tx_fwd_offload,
296 struct netlink_ext_ack *extack);
297 void switchdev_bridge_port_unoffload(struct net_device *brport_dev,
298 const void *ctx,
299 struct notifier_block *atomic_nb,
300 struct notifier_block *blocking_nb);
301
302 void switchdev_deferred_process(void);
303 int switchdev_port_attr_set(struct net_device *dev,
304 const struct switchdev_attr *attr,
305 struct netlink_ext_ack *extack);
306 int switchdev_port_obj_add(struct net_device *dev,
307 const struct switchdev_obj *obj,
308 struct netlink_ext_ack *extack);
309 int switchdev_port_obj_del(struct net_device *dev,
310 const struct switchdev_obj *obj);
311
312 int register_switchdev_notifier(struct notifier_block *nb);
313 int unregister_switchdev_notifier(struct notifier_block *nb);
314 int call_switchdev_notifiers(unsigned long val, struct net_device *dev,
315 struct switchdev_notifier_info *info,
316 struct netlink_ext_ack *extack);
317
318 int register_switchdev_blocking_notifier(struct notifier_block *nb);
319 int unregister_switchdev_blocking_notifier(struct notifier_block *nb);
320 int call_switchdev_blocking_notifiers(unsigned long val, struct net_device *dev,
321 struct switchdev_notifier_info *info,
322 struct netlink_ext_ack *extack);
323
324 void switchdev_port_fwd_mark_set(struct net_device *dev,
325 struct net_device *group_dev,
326 bool joining);
327
328 int switchdev_handle_fdb_event_to_device(struct net_device *dev, unsigned long event,
329 const struct switchdev_notifier_fdb_info *fdb_info,
330 bool (*check_cb)(const struct net_device *dev),
331 bool (*foreign_dev_check_cb)(const struct net_device *dev,
332 const struct net_device *foreign_dev),
333 int (*mod_cb)(struct net_device *dev, struct net_device *orig_dev,
334 unsigned long event, const void *ctx,
335 const struct switchdev_notifier_fdb_info *fdb_info));
336
337 int switchdev_handle_port_obj_add(struct net_device *dev,
338 struct switchdev_notifier_port_obj_info *port_obj_info,
339 bool (*check_cb)(const struct net_device *dev),
340 int (*add_cb)(struct net_device *dev, const void *ctx,
341 const struct switchdev_obj *obj,
342 struct netlink_ext_ack *extack));
343 int switchdev_handle_port_obj_add_foreign(struct net_device *dev,
344 struct switchdev_notifier_port_obj_info *port_obj_info,
345 bool (*check_cb)(const struct net_device *dev),
346 bool (*foreign_dev_check_cb)(const struct net_device *dev,
347 const struct net_device *foreign_dev),
348 int (*add_cb)(struct net_device *dev, const void *ctx,
349 const struct switchdev_obj *obj,
350 struct netlink_ext_ack *extack));
351 int switchdev_handle_port_obj_del(struct net_device *dev,
352 struct switchdev_notifier_port_obj_info *port_obj_info,
353 bool (*check_cb)(const struct net_device *dev),
354 int (*del_cb)(struct net_device *dev, const void *ctx,
355 const struct switchdev_obj *obj));
356 int switchdev_handle_port_obj_del_foreign(struct net_device *dev,
357 struct switchdev_notifier_port_obj_info *port_obj_info,
358 bool (*check_cb)(const struct net_device *dev),
359 bool (*foreign_dev_check_cb)(const struct net_device *dev,
360 const struct net_device *foreign_dev),
361 int (*del_cb)(struct net_device *dev, const void *ctx,
362 const struct switchdev_obj *obj));
363
364 int switchdev_handle_port_attr_set(struct net_device *dev,
365 struct switchdev_notifier_port_attr_info *port_attr_info,
366 bool (*check_cb)(const struct net_device *dev),
367 int (*set_cb)(struct net_device *dev, const void *ctx,
368 const struct switchdev_attr *attr,
369 struct netlink_ext_ack *extack));
370 #else
371
372 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)373 switchdev_bridge_port_offload(struct net_device *brport_dev,
374 struct net_device *dev, const void *ctx,
375 struct notifier_block *atomic_nb,
376 struct notifier_block *blocking_nb,
377 bool tx_fwd_offload,
378 struct netlink_ext_ack *extack)
379 {
380 return -EOPNOTSUPP;
381 }
382
383 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)384 switchdev_bridge_port_unoffload(struct net_device *brport_dev,
385 const void *ctx,
386 struct notifier_block *atomic_nb,
387 struct notifier_block *blocking_nb)
388 {
389 }
390
switchdev_deferred_process(void)391 static inline void switchdev_deferred_process(void)
392 {
393 }
394
switchdev_port_attr_set(struct net_device * dev,const struct switchdev_attr * attr,struct netlink_ext_ack * extack)395 static inline int switchdev_port_attr_set(struct net_device *dev,
396 const struct switchdev_attr *attr,
397 struct netlink_ext_ack *extack)
398 {
399 return -EOPNOTSUPP;
400 }
401
switchdev_port_obj_add(struct net_device * dev,const struct switchdev_obj * obj,struct netlink_ext_ack * extack)402 static inline int switchdev_port_obj_add(struct net_device *dev,
403 const struct switchdev_obj *obj,
404 struct netlink_ext_ack *extack)
405 {
406 return -EOPNOTSUPP;
407 }
408
switchdev_port_obj_del(struct net_device * dev,const struct switchdev_obj * obj)409 static inline int switchdev_port_obj_del(struct net_device *dev,
410 const struct switchdev_obj *obj)
411 {
412 return -EOPNOTSUPP;
413 }
414
register_switchdev_notifier(struct notifier_block * nb)415 static inline int register_switchdev_notifier(struct notifier_block *nb)
416 {
417 return 0;
418 }
419
unregister_switchdev_notifier(struct notifier_block * nb)420 static inline int unregister_switchdev_notifier(struct notifier_block *nb)
421 {
422 return 0;
423 }
424
call_switchdev_notifiers(unsigned long val,struct net_device * dev,struct switchdev_notifier_info * info,struct netlink_ext_ack * extack)425 static inline int call_switchdev_notifiers(unsigned long val,
426 struct net_device *dev,
427 struct switchdev_notifier_info *info,
428 struct netlink_ext_ack *extack)
429 {
430 return NOTIFY_DONE;
431 }
432
433 static inline int
register_switchdev_blocking_notifier(struct notifier_block * nb)434 register_switchdev_blocking_notifier(struct notifier_block *nb)
435 {
436 return 0;
437 }
438
439 static inline int
unregister_switchdev_blocking_notifier(struct notifier_block * nb)440 unregister_switchdev_blocking_notifier(struct notifier_block *nb)
441 {
442 return 0;
443 }
444
445 static inline int
call_switchdev_blocking_notifiers(unsigned long val,struct net_device * dev,struct switchdev_notifier_info * info,struct netlink_ext_ack * extack)446 call_switchdev_blocking_notifiers(unsigned long val,
447 struct net_device *dev,
448 struct switchdev_notifier_info *info,
449 struct netlink_ext_ack *extack)
450 {
451 return NOTIFY_DONE;
452 }
453
454 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))455 switchdev_handle_fdb_event_to_device(struct net_device *dev, unsigned long event,
456 const struct switchdev_notifier_fdb_info *fdb_info,
457 bool (*check_cb)(const struct net_device *dev),
458 bool (*foreign_dev_check_cb)(const struct net_device *dev,
459 const struct net_device *foreign_dev),
460 int (*mod_cb)(struct net_device *dev, struct net_device *orig_dev,
461 unsigned long event, const void *ctx,
462 const struct switchdev_notifier_fdb_info *fdb_info))
463 {
464 return 0;
465 }
466
467 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))468 switchdev_handle_port_obj_add(struct net_device *dev,
469 struct switchdev_notifier_port_obj_info *port_obj_info,
470 bool (*check_cb)(const struct net_device *dev),
471 int (*add_cb)(struct net_device *dev, const void *ctx,
472 const struct switchdev_obj *obj,
473 struct netlink_ext_ack *extack))
474 {
475 return 0;
476 }
477
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))478 static inline int switchdev_handle_port_obj_add_foreign(struct net_device *dev,
479 struct switchdev_notifier_port_obj_info *port_obj_info,
480 bool (*check_cb)(const struct net_device *dev),
481 bool (*foreign_dev_check_cb)(const struct net_device *dev,
482 const struct net_device *foreign_dev),
483 int (*add_cb)(struct net_device *dev, const void *ctx,
484 const struct switchdev_obj *obj,
485 struct netlink_ext_ack *extack))
486 {
487 return 0;
488 }
489
490 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))491 switchdev_handle_port_obj_del(struct net_device *dev,
492 struct switchdev_notifier_port_obj_info *port_obj_info,
493 bool (*check_cb)(const struct net_device *dev),
494 int (*del_cb)(struct net_device *dev, const void *ctx,
495 const struct switchdev_obj *obj))
496 {
497 return 0;
498 }
499
500 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))501 switchdev_handle_port_obj_del_foreign(struct net_device *dev,
502 struct switchdev_notifier_port_obj_info *port_obj_info,
503 bool (*check_cb)(const struct net_device *dev),
504 bool (*foreign_dev_check_cb)(const struct net_device *dev,
505 const struct net_device *foreign_dev),
506 int (*del_cb)(struct net_device *dev, const void *ctx,
507 const struct switchdev_obj *obj))
508 {
509 return 0;
510 }
511
512 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))513 switchdev_handle_port_attr_set(struct net_device *dev,
514 struct switchdev_notifier_port_attr_info *port_attr_info,
515 bool (*check_cb)(const struct net_device *dev),
516 int (*set_cb)(struct net_device *dev, const void *ctx,
517 const struct switchdev_attr *attr,
518 struct netlink_ext_ack *extack))
519 {
520 return 0;
521 }
522 #endif
523
524 #endif /* _LINUX_SWITCHDEV_H_ */
525