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 struct switchdev_brport { 205 struct net_device *dev; 206 const void *ctx; 207 struct notifier_block *atomic_nb; 208 struct notifier_block *blocking_nb; 209 bool tx_fwd_offload; 210 }; 211 212 enum switchdev_notifier_type { 213 SWITCHDEV_FDB_ADD_TO_BRIDGE = 1, 214 SWITCHDEV_FDB_DEL_TO_BRIDGE, 215 SWITCHDEV_FDB_ADD_TO_DEVICE, 216 SWITCHDEV_FDB_DEL_TO_DEVICE, 217 SWITCHDEV_FDB_OFFLOADED, 218 SWITCHDEV_FDB_FLUSH_TO_BRIDGE, 219 220 SWITCHDEV_PORT_OBJ_ADD, /* Blocking. */ 221 SWITCHDEV_PORT_OBJ_DEL, /* Blocking. */ 222 SWITCHDEV_PORT_ATTR_SET, /* May be blocking . */ 223 224 SWITCHDEV_VXLAN_FDB_ADD_TO_BRIDGE, 225 SWITCHDEV_VXLAN_FDB_DEL_TO_BRIDGE, 226 SWITCHDEV_VXLAN_FDB_ADD_TO_DEVICE, 227 SWITCHDEV_VXLAN_FDB_DEL_TO_DEVICE, 228 SWITCHDEV_VXLAN_FDB_OFFLOADED, 229 230 SWITCHDEV_BRPORT_OFFLOADED, 231 SWITCHDEV_BRPORT_UNOFFLOADED, 232 SWITCHDEV_BRPORT_REPLAY, 233 }; 234 235 struct switchdev_notifier_info { 236 struct net_device *dev; 237 struct netlink_ext_ack *extack; 238 const void *ctx; 239 }; 240 241 /* Remember to update br_switchdev_fdb_populate() when adding 242 * new members to this structure 243 */ 244 struct switchdev_notifier_fdb_info { 245 struct switchdev_notifier_info info; /* must be first */ 246 const unsigned char *addr; 247 u16 vid; 248 u8 added_by_user:1, 249 is_local:1, 250 locked: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 int switchdev_bridge_port_replay(struct net_device *brport_dev, 302 struct net_device *dev, const void *ctx, 303 struct notifier_block *atomic_nb, 304 struct notifier_block *blocking_nb, 305 struct netlink_ext_ack *extack); 306 307 void switchdev_deferred_process(void); 308 int switchdev_port_attr_set(struct net_device *dev, 309 const struct switchdev_attr *attr, 310 struct netlink_ext_ack *extack); 311 bool switchdev_port_obj_act_is_deferred(struct net_device *dev, 312 enum switchdev_notifier_type nt, 313 const struct switchdev_obj *obj); 314 int switchdev_port_obj_add(struct net_device *dev, 315 const struct switchdev_obj *obj, 316 struct netlink_ext_ack *extack); 317 int switchdev_port_obj_del(struct net_device *dev, 318 const struct switchdev_obj *obj); 319 320 int register_switchdev_notifier(struct notifier_block *nb); 321 int unregister_switchdev_notifier(struct notifier_block *nb); 322 int call_switchdev_notifiers(unsigned long val, struct net_device *dev, 323 struct switchdev_notifier_info *info, 324 struct netlink_ext_ack *extack); 325 326 int register_switchdev_blocking_notifier(struct notifier_block *nb); 327 int unregister_switchdev_blocking_notifier(struct notifier_block *nb); 328 int call_switchdev_blocking_notifiers(unsigned long val, struct net_device *dev, 329 struct switchdev_notifier_info *info, 330 struct netlink_ext_ack *extack); 331 332 int switchdev_handle_fdb_event_to_device(struct net_device *dev, unsigned long event, 333 const struct switchdev_notifier_fdb_info *fdb_info, 334 bool (*check_cb)(const struct net_device *dev), 335 bool (*foreign_dev_check_cb)(const struct net_device *dev, 336 const struct net_device *foreign_dev), 337 int (*mod_cb)(struct net_device *dev, struct net_device *orig_dev, 338 unsigned long event, const void *ctx, 339 const struct switchdev_notifier_fdb_info *fdb_info)); 340 341 int switchdev_handle_port_obj_add(struct net_device *dev, 342 struct switchdev_notifier_port_obj_info *port_obj_info, 343 bool (*check_cb)(const struct net_device *dev), 344 int (*add_cb)(struct net_device *dev, const void *ctx, 345 const struct switchdev_obj *obj, 346 struct netlink_ext_ack *extack)); 347 int switchdev_handle_port_obj_add_foreign(struct net_device *dev, 348 struct switchdev_notifier_port_obj_info *port_obj_info, 349 bool (*check_cb)(const struct net_device *dev), 350 bool (*foreign_dev_check_cb)(const struct net_device *dev, 351 const struct net_device *foreign_dev), 352 int (*add_cb)(struct net_device *dev, const void *ctx, 353 const struct switchdev_obj *obj, 354 struct netlink_ext_ack *extack)); 355 int switchdev_handle_port_obj_del(struct net_device *dev, 356 struct switchdev_notifier_port_obj_info *port_obj_info, 357 bool (*check_cb)(const struct net_device *dev), 358 int (*del_cb)(struct net_device *dev, const void *ctx, 359 const struct switchdev_obj *obj)); 360 int switchdev_handle_port_obj_del_foreign(struct net_device *dev, 361 struct switchdev_notifier_port_obj_info *port_obj_info, 362 bool (*check_cb)(const struct net_device *dev), 363 bool (*foreign_dev_check_cb)(const struct net_device *dev, 364 const struct net_device *foreign_dev), 365 int (*del_cb)(struct net_device *dev, const void *ctx, 366 const struct switchdev_obj *obj)); 367 368 int switchdev_handle_port_attr_set(struct net_device *dev, 369 struct switchdev_notifier_port_attr_info *port_attr_info, 370 bool (*check_cb)(const struct net_device *dev), 371 int (*set_cb)(struct net_device *dev, const void *ctx, 372 const struct switchdev_attr *attr, 373 struct netlink_ext_ack *extack)); 374 #else 375 376 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)377 switchdev_bridge_port_offload(struct net_device *brport_dev, 378 struct net_device *dev, const void *ctx, 379 struct notifier_block *atomic_nb, 380 struct notifier_block *blocking_nb, 381 bool tx_fwd_offload, 382 struct netlink_ext_ack *extack) 383 { 384 return -EOPNOTSUPP; 385 } 386 387 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)388 switchdev_bridge_port_unoffload(struct net_device *brport_dev, 389 const void *ctx, 390 struct notifier_block *atomic_nb, 391 struct notifier_block *blocking_nb) 392 { 393 } 394 switchdev_deferred_process(void)395 static inline void switchdev_deferred_process(void) 396 { 397 } 398 switchdev_port_attr_set(struct net_device * dev,const struct switchdev_attr * attr,struct netlink_ext_ack * extack)399 static inline int switchdev_port_attr_set(struct net_device *dev, 400 const struct switchdev_attr *attr, 401 struct netlink_ext_ack *extack) 402 { 403 return -EOPNOTSUPP; 404 } 405 switchdev_port_obj_add(struct net_device * dev,const struct switchdev_obj * obj,struct netlink_ext_ack * extack)406 static inline int switchdev_port_obj_add(struct net_device *dev, 407 const struct switchdev_obj *obj, 408 struct netlink_ext_ack *extack) 409 { 410 return -EOPNOTSUPP; 411 } 412 switchdev_port_obj_del(struct net_device * dev,const struct switchdev_obj * obj)413 static inline int switchdev_port_obj_del(struct net_device *dev, 414 const struct switchdev_obj *obj) 415 { 416 return -EOPNOTSUPP; 417 } 418 register_switchdev_notifier(struct notifier_block * nb)419 static inline int register_switchdev_notifier(struct notifier_block *nb) 420 { 421 return 0; 422 } 423 unregister_switchdev_notifier(struct notifier_block * nb)424 static inline int unregister_switchdev_notifier(struct notifier_block *nb) 425 { 426 return 0; 427 } 428 call_switchdev_notifiers(unsigned long val,struct net_device * dev,struct switchdev_notifier_info * info,struct netlink_ext_ack * extack)429 static inline int call_switchdev_notifiers(unsigned long val, 430 struct net_device *dev, 431 struct switchdev_notifier_info *info, 432 struct netlink_ext_ack *extack) 433 { 434 return NOTIFY_DONE; 435 } 436 437 static inline int register_switchdev_blocking_notifier(struct notifier_block * nb)438 register_switchdev_blocking_notifier(struct notifier_block *nb) 439 { 440 return 0; 441 } 442 443 static inline int unregister_switchdev_blocking_notifier(struct notifier_block * nb)444 unregister_switchdev_blocking_notifier(struct notifier_block *nb) 445 { 446 return 0; 447 } 448 449 static inline int call_switchdev_blocking_notifiers(unsigned long val,struct net_device * dev,struct switchdev_notifier_info * info,struct netlink_ext_ack * extack)450 call_switchdev_blocking_notifiers(unsigned long val, 451 struct net_device *dev, 452 struct switchdev_notifier_info *info, 453 struct netlink_ext_ack *extack) 454 { 455 return NOTIFY_DONE; 456 } 457 458 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))459 switchdev_handle_fdb_event_to_device(struct net_device *dev, unsigned long event, 460 const struct switchdev_notifier_fdb_info *fdb_info, 461 bool (*check_cb)(const struct net_device *dev), 462 bool (*foreign_dev_check_cb)(const struct net_device *dev, 463 const struct net_device *foreign_dev), 464 int (*mod_cb)(struct net_device *dev, struct net_device *orig_dev, 465 unsigned long event, const void *ctx, 466 const struct switchdev_notifier_fdb_info *fdb_info)) 467 { 468 return 0; 469 } 470 471 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))472 switchdev_handle_port_obj_add(struct net_device *dev, 473 struct switchdev_notifier_port_obj_info *port_obj_info, 474 bool (*check_cb)(const struct net_device *dev), 475 int (*add_cb)(struct net_device *dev, const void *ctx, 476 const struct switchdev_obj *obj, 477 struct netlink_ext_ack *extack)) 478 { 479 return 0; 480 } 481 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))482 static inline int switchdev_handle_port_obj_add_foreign(struct net_device *dev, 483 struct switchdev_notifier_port_obj_info *port_obj_info, 484 bool (*check_cb)(const struct net_device *dev), 485 bool (*foreign_dev_check_cb)(const struct net_device *dev, 486 const struct net_device *foreign_dev), 487 int (*add_cb)(struct net_device *dev, const void *ctx, 488 const struct switchdev_obj *obj, 489 struct netlink_ext_ack *extack)) 490 { 491 return 0; 492 } 493 494 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))495 switchdev_handle_port_obj_del(struct net_device *dev, 496 struct switchdev_notifier_port_obj_info *port_obj_info, 497 bool (*check_cb)(const struct net_device *dev), 498 int (*del_cb)(struct net_device *dev, const void *ctx, 499 const struct switchdev_obj *obj)) 500 { 501 return 0; 502 } 503 504 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))505 switchdev_handle_port_obj_del_foreign(struct net_device *dev, 506 struct switchdev_notifier_port_obj_info *port_obj_info, 507 bool (*check_cb)(const struct net_device *dev), 508 bool (*foreign_dev_check_cb)(const struct net_device *dev, 509 const struct net_device *foreign_dev), 510 int (*del_cb)(struct net_device *dev, const void *ctx, 511 const struct switchdev_obj *obj)) 512 { 513 return 0; 514 } 515 516 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))517 switchdev_handle_port_attr_set(struct net_device *dev, 518 struct switchdev_notifier_port_attr_info *port_attr_info, 519 bool (*check_cb)(const struct net_device *dev), 520 int (*set_cb)(struct net_device *dev, const void *ctx, 521 const struct switchdev_attr *attr, 522 struct netlink_ext_ack *extack)) 523 { 524 return 0; 525 } 526 #endif 527 528 #endif /* _LINUX_SWITCHDEV_H_ */ 529