include/net/switchdev.h

   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 #if IS_ENABLED(CONFIG_BRIDGE_MRP)
  44         SWITCHDEV_ATTR_ID_MRP_PORT_STATE,
  45         SWITCHDEV_ATTR_ID_MRP_PORT_ROLE,
  46 #endif
  47 };
  48
  49 struct 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 #if IS_ENABLED(CONFIG_BRIDGE_MRP)
  63                 u8 mrp_port_state;                      /* MRP_PORT_STATE */
  64                 u8 mrp_port_role;                       /* MRP_PORT_ROLE */
  65 #endif
  66         } u;
  67 };
  68
  69 enum switchdev_obj_id {
  70         SWITCHDEV_OBJ_ID_UNDEFINED,
  71         SWITCHDEV_OBJ_ID_PORT_VLAN,
  72         SWITCHDEV_OBJ_ID_PORT_MDB,
  73         SWITCHDEV_OBJ_ID_HOST_MDB,
  74 #if IS_ENABLED(CONFIG_BRIDGE_MRP)
  75         SWITCHDEV_OBJ_ID_MRP,
  76         SWITCHDEV_OBJ_ID_RING_TEST_MRP,
  77         SWITCHDEV_OBJ_ID_RING_ROLE_MRP,
  78         SWITCHDEV_OBJ_ID_RING_STATE_MRP,
  79         SWITCHDEV_OBJ_ID_IN_TEST_MRP,
  80         SWITCHDEV_OBJ_ID_IN_ROLE_MRP,
  81         SWITCHDEV_OBJ_ID_IN_STATE_MRP,
  82
  83 #endif
  84 };
  85
  86 struct switchdev_obj {
  87         struct net_device *orig_dev;
  88         enum switchdev_obj_id id;
  89         u32 flags;
  90         void *complete_priv;
  91         void (*complete)(struct net_device *dev, int err, void *priv);
  92 };
  93
  94 /* SWITCHDEV_OBJ_ID_PORT_VLAN */
  95 struct switchdev_obj_port_vlan {
  96         struct switchdev_obj obj;
  97         u16 flags;
  98         u16 vid_begin;
  99         u16 vid_end;
 100 };
 101
 102 #define SWITCHDEV_OBJ_PORT_VLAN(OBJ) \
 103         container_of((OBJ), struct switchdev_obj_port_vlan, obj)
 104
 105 /* SWITCHDEV_OBJ_ID_PORT_MDB */
 106 struct switchdev_obj_port_mdb {
 107         struct switchdev_obj obj;
 108         unsigned char addr[ETH_ALEN];
 109         u16 vid;
 110 };
 111
 112 #define SWITCHDEV_OBJ_PORT_MDB(OBJ) \
 113         container_of((OBJ), struct switchdev_obj_port_mdb, obj)
 114
 115
 116 #if IS_ENABLED(CONFIG_BRIDGE_MRP)
 117 /* SWITCHDEV_OBJ_ID_MRP */
 118 struct switchdev_obj_mrp {
 119         struct switchdev_obj obj;
 120         struct net_device *p_port;
 121         struct net_device *s_port;
 122         u32 ring_id;
 123         u16 prio;
 124 };
 125
 126 #define SWITCHDEV_OBJ_MRP(OBJ) \
 127         container_of((OBJ), struct switchdev_obj_mrp, obj)
 128
 129 /* SWITCHDEV_OBJ_ID_RING_TEST_MRP */
 130 struct switchdev_obj_ring_test_mrp {
 131         struct switchdev_obj obj;
 132         /* The value is in us and a value of 0 represents to stop */
 133         u32 interval;
 134         u8 max_miss;
 135         u32 ring_id;
 136         u32 period;
 137         bool monitor;
 138 };
 139
 140 #define SWITCHDEV_OBJ_RING_TEST_MRP(OBJ) \
 141         container_of((OBJ), struct switchdev_obj_ring_test_mrp, obj)
 142
 143 /* SWICHDEV_OBJ_ID_RING_ROLE_MRP */
 144 struct switchdev_obj_ring_role_mrp {
 145         struct switchdev_obj obj;
 146         u8 ring_role;
 147         u32 ring_id;
 148 };
 149
 150 #define SWITCHDEV_OBJ_RING_ROLE_MRP(OBJ) \
 151         container_of((OBJ), struct switchdev_obj_ring_role_mrp, obj)
 152
 153 struct switchdev_obj_ring_state_mrp {
 154         struct switchdev_obj obj;
 155         u8 ring_state;
 156         u32 ring_id;
 157 };
 158
 159 #define SWITCHDEV_OBJ_RING_STATE_MRP(OBJ) \
 160         container_of((OBJ), struct switchdev_obj_ring_state_mrp, obj)
 161
 162 /* SWITCHDEV_OBJ_ID_IN_TEST_MRP */
 163 struct switchdev_obj_in_test_mrp {
 164         struct switchdev_obj obj;
 165         /* The value is in us and a value of 0 represents to stop */
 166         u32 interval;
 167         u32 in_id;
 168         u32 period;
 169         u8 max_miss;
 170 };
 171
 172 #define SWITCHDEV_OBJ_IN_TEST_MRP(OBJ) \
 173         container_of((OBJ), struct switchdev_obj_in_test_mrp, obj)
 174
 175 /* SWICHDEV_OBJ_ID_IN_ROLE_MRP */
 176 struct switchdev_obj_in_role_mrp {
 177         struct switchdev_obj obj;
 178         struct net_device *i_port;
 179         u32 ring_id;
 180         u16 in_id;
 181         u8 in_role;
 182 };
 183
 184 #define SWITCHDEV_OBJ_IN_ROLE_MRP(OBJ) \
 185         container_of((OBJ), struct switchdev_obj_in_role_mrp, obj)
 186
 187 struct switchdev_obj_in_state_mrp {
 188         struct switchdev_obj obj;
 189         u32 in_id;
 190         u8 in_state;
 191 };
 192
 193 #define SWITCHDEV_OBJ_IN_STATE_MRP(OBJ) \
 194         container_of((OBJ), struct switchdev_obj_in_state_mrp, obj)
 195
 196 #endif
 197
 198 typedef int switchdev_obj_dump_cb_t(struct switchdev_obj *obj);
 199
 200 enum switchdev_notifier_type {
 201         SWITCHDEV_FDB_ADD_TO_BRIDGE = 1,
 202         SWITCHDEV_FDB_DEL_TO_BRIDGE,
 203         SWITCHDEV_FDB_ADD_TO_DEVICE,
 204         SWITCHDEV_FDB_DEL_TO_DEVICE,
 205         SWITCHDEV_FDB_OFFLOADED,
 206
 207         SWITCHDEV_PORT_OBJ_ADD, /* Blocking. */
 208         SWITCHDEV_PORT_OBJ_DEL, /* Blocking. */
 209         SWITCHDEV_PORT_ATTR_SET, /* May be blocking . */
 210
 211         SWITCHDEV_VXLAN_FDB_ADD_TO_BRIDGE,
 212         SWITCHDEV_VXLAN_FDB_DEL_TO_BRIDGE,
 213         SWITCHDEV_VXLAN_FDB_ADD_TO_DEVICE,
 214         SWITCHDEV_VXLAN_FDB_DEL_TO_DEVICE,
 215         SWITCHDEV_VXLAN_FDB_OFFLOADED,
 216 };
 217
 218 struct switchdev_notifier_info {
 219         struct net_device *dev;
 220         struct netlink_ext_ack *extack;
 221 };
 222
 223 struct switchdev_notifier_fdb_info {
 224         struct switchdev_notifier_info info; /* must be first */
 225         const unsigned char *addr;
 226         u16 vid;
 227         u8 added_by_user:1,
 228            offloaded:1;
 229 };
 230
 231 struct switchdev_notifier_port_obj_info {
 232         struct switchdev_notifier_info info; /* must be first */
 233         const struct switchdev_obj *obj;
 234         struct switchdev_trans *trans;
 235         bool handled;
 236 };
 237
 238 struct switchdev_notifier_port_attr_info {
 239         struct switchdev_notifier_info info; /* must be first */
 240         const struct switchdev_attr *attr;
 241         struct switchdev_trans *trans;
 242         bool handled;
 243 };
 244
 245 static inline struct net_device *
 246 switchdev_notifier_info_to_dev(const struct switchdev_notifier_info *info)
 247 {
 248         return info->dev;
 249 }
 250
 251 static inline struct netlink_ext_ack *
 252 switchdev_notifier_info_to_extack(const struct switchdev_notifier_info *info)
 253 {
 254         return info->extack;
 255 }
 256
 257 #ifdef CONFIG_NET_SWITCHDEV
 258
 259 void switchdev_deferred_process(void);
 260 int switchdev_port_attr_set(struct net_device *dev,
 261                             const struct switchdev_attr *attr);
 262 int switchdev_port_obj_add(struct net_device *dev,
 263                            const struct switchdev_obj *obj,
 264                            struct netlink_ext_ack *extack);
 265 int switchdev_port_obj_del(struct net_device *dev,
 266                            const struct switchdev_obj *obj);
 267
 268 int register_switchdev_notifier(struct notifier_block *nb);
 269 int unregister_switchdev_notifier(struct notifier_block *nb);
 270 int call_switchdev_notifiers(unsigned long val, struct net_device *dev,
 271                              struct switchdev_notifier_info *info,
 272                              struct netlink_ext_ack *extack);
 273
 274 int register_switchdev_blocking_notifier(struct notifier_block *nb);
 275 int unregister_switchdev_blocking_notifier(struct notifier_block *nb);
 276 int call_switchdev_blocking_notifiers(unsigned long val, struct net_device *dev,
 277                                       struct switchdev_notifier_info *info,
 278                                       struct netlink_ext_ack *extack);
 279
 280 void switchdev_port_fwd_mark_set(struct net_device *dev,
 281                                  struct net_device *group_dev,
 282                                  bool joining);
 283
 284 int switchdev_handle_port_obj_add(struct net_device *dev,
 285                         struct switchdev_notifier_port_obj_info *port_obj_info,
 286                         bool (*check_cb)(const struct net_device *dev),
 287                         int (*add_cb)(struct net_device *dev,
 288                                       const struct switchdev_obj *obj,
 289                                       struct switchdev_trans *trans,
 290                                       struct netlink_ext_ack *extack));
 291 int switchdev_handle_port_obj_del(struct net_device *dev,
 292                         struct switchdev_notifier_port_obj_info *port_obj_info,
 293                         bool (*check_cb)(const struct net_device *dev),
 294                         int (*del_cb)(struct net_device *dev,
 295                                       const struct switchdev_obj *obj));
 296
 297 int switchdev_handle_port_attr_set(struct net_device *dev,
 298                         struct switchdev_notifier_port_attr_info *port_attr_info,
 299                         bool (*check_cb)(const struct net_device *dev),
 300                         int (*set_cb)(struct net_device *dev,
 301                                       const struct switchdev_attr *attr,
 302                                       struct switchdev_trans *trans));
 303 #else
 304
 305 static inline void switchdev_deferred_process(void)
 306 {
 307 }
 308
 309 static inline int switchdev_port_attr_set(struct net_device *dev,
 310                                           const struct switchdev_attr *attr)
 311 {
 312         return -EOPNOTSUPP;
 313 }
 314
 315 static inline int switchdev_port_obj_add(struct net_device *dev,
 316                                          const struct switchdev_obj *obj,
 317                                          struct netlink_ext_ack *extack)
 318 {
 319         return -EOPNOTSUPP;
 320 }
 321
 322 static inline int switchdev_port_obj_del(struct net_device *dev,
 323                                          const struct switchdev_obj *obj)
 324 {
 325         return -EOPNOTSUPP;
 326 }
 327
 328 static inline int register_switchdev_notifier(struct notifier_block *nb)
 329 {
 330         return 0;
 331 }
 332
 333 static inline int unregister_switchdev_notifier(struct notifier_block *nb)
 334 {
 335         return 0;
 336 }
 337
 338 static inline int call_switchdev_notifiers(unsigned long val,
 339                                            struct net_device *dev,
 340                                            struct switchdev_notifier_info *info,
 341                                            struct netlink_ext_ack *extack)
 342 {
 343         return NOTIFY_DONE;
 344 }
 345
 346 static inline int
 347 register_switchdev_blocking_notifier(struct notifier_block *nb)
 348 {
 349         return 0;
 350 }
 351
 352 static inline int
 353 unregister_switchdev_blocking_notifier(struct notifier_block *nb)
 354 {
 355         return 0;
 356 }
 357
 358 static inline int
 359 call_switchdev_blocking_notifiers(unsigned long val,
 360                                   struct net_device *dev,
 361                                   struct switchdev_notifier_info *info,
 362                                   struct netlink_ext_ack *extack)
 363 {
 364         return NOTIFY_DONE;
 365 }
 366
 367 static inline int
 368 switchdev_handle_port_obj_add(struct net_device *dev,
 369                         struct switchdev_notifier_port_obj_info *port_obj_info,
 370                         bool (*check_cb)(const struct net_device *dev),
 371                         int (*add_cb)(struct net_device *dev,
 372                                       const struct switchdev_obj *obj,
 373                                       struct switchdev_trans *trans,
 374                                       struct netlink_ext_ack *extack))
 375 {
 376         return 0;
 377 }
 378
 379 static inline int
 380 switchdev_handle_port_obj_del(struct net_device *dev,
 381                         struct switchdev_notifier_port_obj_info *port_obj_info,
 382                         bool (*check_cb)(const struct net_device *dev),
 383                         int (*del_cb)(struct net_device *dev,
 384                                       const struct switchdev_obj *obj))
 385 {
 386         return 0;
 387 }
 388
 389 static inline int
 390 switchdev_handle_port_attr_set(struct net_device *dev,
 391                         struct switchdev_notifier_port_attr_info *port_attr_info,
 392                         bool (*check_cb)(const struct net_device *dev),
 393                         int (*set_cb)(struct net_device *dev,
 394                                       const struct switchdev_attr *attr,
 395                                       struct switchdev_trans *trans))
 396 {
 397         return 0;
 398 }
 399 #endif
 400
 401 #endif /* _LINUX_SWITCHDEV_H_ */