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 enum switchdev_attr_id {
  20         SWITCHDEV_ATTR_ID_UNDEFINED,
  21         SWITCHDEV_ATTR_ID_PORT_STP_STATE,
  22         SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS,
  23         SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS,
  24         SWITCHDEV_ATTR_ID_PORT_MROUTER,
  25         SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME,
  26         SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING,
  27         SWITCHDEV_ATTR_ID_BRIDGE_VLAN_PROTOCOL,
  28         SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED,
  29         SWITCHDEV_ATTR_ID_BRIDGE_MROUTER,
  30         SWITCHDEV_ATTR_ID_MRP_PORT_ROLE,
  31 };
  32
  33 struct switchdev_brport_flags {
  34         unsigned long val;
  35         unsigned long mask;
  36 };
  37
  38 struct switchdev_attr {
  39         struct net_device *orig_dev;
  40         enum switchdev_attr_id id;
  41         u32 flags;
  42         void *complete_priv;
  43         void (*complete)(struct net_device *dev, int err, void *priv);
  44         union {
  45                 u8 stp_state;                           /* PORT_STP_STATE */
  46                 struct switchdev_brport_flags brport_flags; /* PORT_BRIDGE_FLAGS */
  47                 bool mrouter;                           /* PORT_MROUTER */
  48                 clock_t ageing_time;                    /* BRIDGE_AGEING_TIME */
  49                 bool vlan_filtering;                    /* BRIDGE_VLAN_FILTERING */
  50                 u16 vlan_protocol;                      /* BRIDGE_VLAN_PROTOCOL */
  51                 bool mc_disabled;                       /* MC_DISABLED */
  52                 u8 mrp_port_role;                       /* MRP_PORT_ROLE */
  53         } u;
  54 };
  55
  56 enum switchdev_obj_id {
  57         SWITCHDEV_OBJ_ID_UNDEFINED,
  58         SWITCHDEV_OBJ_ID_PORT_VLAN,
  59         SWITCHDEV_OBJ_ID_PORT_MDB,
  60         SWITCHDEV_OBJ_ID_HOST_MDB,
  61         SWITCHDEV_OBJ_ID_MRP,
  62         SWITCHDEV_OBJ_ID_RING_TEST_MRP,
  63         SWITCHDEV_OBJ_ID_RING_ROLE_MRP,
  64         SWITCHDEV_OBJ_ID_RING_STATE_MRP,
  65         SWITCHDEV_OBJ_ID_IN_TEST_MRP,
  66         SWITCHDEV_OBJ_ID_IN_ROLE_MRP,
  67         SWITCHDEV_OBJ_ID_IN_STATE_MRP,
  68 };
  69
  70 struct switchdev_obj {
  71         struct list_head list;
  72         struct net_device *orig_dev;
  73         enum switchdev_obj_id id;
  74         u32 flags;
  75         void *complete_priv;
  76         void (*complete)(struct net_device *dev, int err, void *priv);
  77 };
  78
  79 /* SWITCHDEV_OBJ_ID_PORT_VLAN */
  80 struct switchdev_obj_port_vlan {
  81         struct switchdev_obj obj;
  82         u16 flags;
  83         u16 vid;
  84 };
  85
  86 #define SWITCHDEV_OBJ_PORT_VLAN(OBJ) \
  87         container_of((OBJ), struct switchdev_obj_port_vlan, obj)
  88
  89 /* SWITCHDEV_OBJ_ID_PORT_MDB */
  90 struct switchdev_obj_port_mdb {
  91         struct switchdev_obj obj;
  92         unsigned char addr[ETH_ALEN];
  93         u16 vid;
  94 };
  95
  96 #define SWITCHDEV_OBJ_PORT_MDB(OBJ) \
  97         container_of((OBJ), struct switchdev_obj_port_mdb, obj)
  98
  99
 100 /* SWITCHDEV_OBJ_ID_MRP */
 101 struct switchdev_obj_mrp {
 102         struct switchdev_obj obj;
 103         struct net_device *p_port;
 104         struct net_device *s_port;
 105         u32 ring_id;
 106         u16 prio;
 107 };
 108
 109 #define SWITCHDEV_OBJ_MRP(OBJ) \
 110         container_of((OBJ), struct switchdev_obj_mrp, obj)
 111
 112 /* SWITCHDEV_OBJ_ID_RING_TEST_MRP */
 113 struct switchdev_obj_ring_test_mrp {
 114         struct switchdev_obj obj;
 115         /* The value is in us and a value of 0 represents to stop */
 116         u32 interval;
 117         u8 max_miss;
 118         u32 ring_id;
 119         u32 period;
 120         bool monitor;
 121 };
 122
 123 #define SWITCHDEV_OBJ_RING_TEST_MRP(OBJ) \
 124         container_of((OBJ), struct switchdev_obj_ring_test_mrp, obj)
 125
 126 /* SWICHDEV_OBJ_ID_RING_ROLE_MRP */
 127 struct switchdev_obj_ring_role_mrp {
 128         struct switchdev_obj obj;
 129         u8 ring_role;
 130         u32 ring_id;
 131         u8 sw_backup;
 132 };
 133
 134 #define SWITCHDEV_OBJ_RING_ROLE_MRP(OBJ) \
 135         container_of((OBJ), struct switchdev_obj_ring_role_mrp, obj)
 136
 137 struct switchdev_obj_ring_state_mrp {
 138         struct switchdev_obj obj;
 139         u8 ring_state;
 140         u32 ring_id;
 141 };
 142
 143 #define SWITCHDEV_OBJ_RING_STATE_MRP(OBJ) \
 144         container_of((OBJ), struct switchdev_obj_ring_state_mrp, obj)
 145
 146 /* SWITCHDEV_OBJ_ID_IN_TEST_MRP */
 147 struct switchdev_obj_in_test_mrp {
 148         struct switchdev_obj obj;
 149         /* The value is in us and a value of 0 represents to stop */
 150         u32 interval;
 151         u32 in_id;
 152         u32 period;
 153         u8 max_miss;
 154 };
 155
 156 #define SWITCHDEV_OBJ_IN_TEST_MRP(OBJ) \
 157         container_of((OBJ), struct switchdev_obj_in_test_mrp, obj)
 158
 159 /* SWICHDEV_OBJ_ID_IN_ROLE_MRP */
 160 struct switchdev_obj_in_role_mrp {
 161         struct switchdev_obj obj;
 162         struct net_device *i_port;
 163         u32 ring_id;
 164         u16 in_id;
 165         u8 in_role;
 166         u8 sw_backup;
 167 };
 168
 169 #define SWITCHDEV_OBJ_IN_ROLE_MRP(OBJ) \
 170         container_of((OBJ), struct switchdev_obj_in_role_mrp, obj)
 171
 172 struct switchdev_obj_in_state_mrp {
 173         struct switchdev_obj obj;
 174         u32 in_id;
 175         u8 in_state;
 176 };
 177
 178 #define SWITCHDEV_OBJ_IN_STATE_MRP(OBJ) \
 179         container_of((OBJ), struct switchdev_obj_in_state_mrp, obj)
 180
 181 typedef int switchdev_obj_dump_cb_t(struct switchdev_obj *obj);
 182
 183 enum switchdev_notifier_type {
 184         SWITCHDEV_FDB_ADD_TO_BRIDGE = 1,
 185         SWITCHDEV_FDB_DEL_TO_BRIDGE,
 186         SWITCHDEV_FDB_ADD_TO_DEVICE,
 187         SWITCHDEV_FDB_DEL_TO_DEVICE,
 188         SWITCHDEV_FDB_OFFLOADED,
 189         SWITCHDEV_FDB_FLUSH_TO_BRIDGE,
 190
 191         SWITCHDEV_PORT_OBJ_ADD, /* Blocking. */
 192         SWITCHDEV_PORT_OBJ_DEL, /* Blocking. */
 193         SWITCHDEV_PORT_ATTR_SET, /* May be blocking . */
 194
 195         SWITCHDEV_VXLAN_FDB_ADD_TO_BRIDGE,
 196         SWITCHDEV_VXLAN_FDB_DEL_TO_BRIDGE,
 197         SWITCHDEV_VXLAN_FDB_ADD_TO_DEVICE,
 198         SWITCHDEV_VXLAN_FDB_DEL_TO_DEVICE,
 199         SWITCHDEV_VXLAN_FDB_OFFLOADED,
 200 };
 201
 202 struct switchdev_notifier_info {
 203         struct net_device *dev;
 204         struct netlink_ext_ack *extack;
 205         const void *ctx;
 206 };
 207
 208 struct switchdev_notifier_fdb_info {
 209         struct switchdev_notifier_info info; /* must be first */
 210         const unsigned char *addr;
 211         u16 vid;
 212         u8 added_by_user:1,
 213            is_local:1,
 214            offloaded:1;
 215 };
 216
 217 struct switchdev_notifier_port_obj_info {
 218         struct switchdev_notifier_info info; /* must be first */
 219         const struct switchdev_obj *obj;
 220         bool handled;
 221 };
 222
 223 struct switchdev_notifier_port_attr_info {
 224         struct switchdev_notifier_info info; /* must be first */
 225         const struct switchdev_attr *attr;
 226         bool handled;
 227 };
 228
 229 static inline struct net_device *
 230 switchdev_notifier_info_to_dev(const struct switchdev_notifier_info *info)
 231 {
 232         return info->dev;
 233 }
 234
 235 static inline struct netlink_ext_ack *
 236 switchdev_notifier_info_to_extack(const struct switchdev_notifier_info *info)
 237 {
 238         return info->extack;
 239 }
 240
 241 #ifdef CONFIG_NET_SWITCHDEV
 242
 243 void switchdev_deferred_process(void);
 244 int switchdev_port_attr_set(struct net_device *dev,
 245                             const struct switchdev_attr *attr,
 246                             struct netlink_ext_ack *extack);
 247 int switchdev_port_obj_add(struct net_device *dev,
 248                            const struct switchdev_obj *obj,
 249                            struct netlink_ext_ack *extack);
 250 int switchdev_port_obj_del(struct net_device *dev,
 251                            const struct switchdev_obj *obj);
 252
 253 int register_switchdev_notifier(struct notifier_block *nb);
 254 int unregister_switchdev_notifier(struct notifier_block *nb);
 255 int call_switchdev_notifiers(unsigned long val, struct net_device *dev,
 256                              struct switchdev_notifier_info *info,
 257                              struct netlink_ext_ack *extack);
 258
 259 int register_switchdev_blocking_notifier(struct notifier_block *nb);
 260 int unregister_switchdev_blocking_notifier(struct notifier_block *nb);
 261 int call_switchdev_blocking_notifiers(unsigned long val, struct net_device *dev,
 262                                       struct switchdev_notifier_info *info,
 263                                       struct netlink_ext_ack *extack);
 264
 265 void switchdev_port_fwd_mark_set(struct net_device *dev,
 266                                  struct net_device *group_dev,
 267                                  bool joining);
 268
 269 int switchdev_handle_port_obj_add(struct net_device *dev,
 270                         struct switchdev_notifier_port_obj_info *port_obj_info,
 271                         bool (*check_cb)(const struct net_device *dev),
 272                         int (*add_cb)(struct net_device *dev, const void *ctx,
 273                                       const struct switchdev_obj *obj,
 274                                       struct netlink_ext_ack *extack));
 275 int switchdev_handle_port_obj_del(struct net_device *dev,
 276                         struct switchdev_notifier_port_obj_info *port_obj_info,
 277                         bool (*check_cb)(const struct net_device *dev),
 278                         int (*del_cb)(struct net_device *dev, const void *ctx,
 279                                       const struct switchdev_obj *obj));
 280
 281 int switchdev_handle_port_attr_set(struct net_device *dev,
 282                         struct switchdev_notifier_port_attr_info *port_attr_info,
 283                         bool (*check_cb)(const struct net_device *dev),
 284                         int (*set_cb)(struct net_device *dev, const void *ctx,
 285                                       const struct switchdev_attr *attr,
 286                                       struct netlink_ext_ack *extack));
 287 #else
 288
 289 static inline void switchdev_deferred_process(void)
 290 {
 291 }
 292
 293 static inline int switchdev_port_attr_set(struct net_device *dev,
 294                                           const struct switchdev_attr *attr,
 295                                           struct netlink_ext_ack *extack)
 296 {
 297         return -EOPNOTSUPP;
 298 }
 299
 300 static inline int switchdev_port_obj_add(struct net_device *dev,
 301                                          const struct switchdev_obj *obj,
 302                                          struct netlink_ext_ack *extack)
 303 {
 304         return -EOPNOTSUPP;
 305 }
 306
 307 static inline int switchdev_port_obj_del(struct net_device *dev,
 308                                          const struct switchdev_obj *obj)
 309 {
 310         return -EOPNOTSUPP;
 311 }
 312
 313 static inline int register_switchdev_notifier(struct notifier_block *nb)
 314 {
 315         return 0;
 316 }
 317
 318 static inline int unregister_switchdev_notifier(struct notifier_block *nb)
 319 {
 320         return 0;
 321 }
 322
 323 static inline int call_switchdev_notifiers(unsigned long val,
 324                                            struct net_device *dev,
 325                                            struct switchdev_notifier_info *info,
 326                                            struct netlink_ext_ack *extack)
 327 {
 328         return NOTIFY_DONE;
 329 }
 330
 331 static inline int
 332 register_switchdev_blocking_notifier(struct notifier_block *nb)
 333 {
 334         return 0;
 335 }
 336
 337 static inline int
 338 unregister_switchdev_blocking_notifier(struct notifier_block *nb)
 339 {
 340         return 0;
 341 }
 342
 343 static inline int
 344 call_switchdev_blocking_notifiers(unsigned long val,
 345                                   struct net_device *dev,
 346                                   struct switchdev_notifier_info *info,
 347                                   struct netlink_ext_ack *extack)
 348 {
 349         return NOTIFY_DONE;
 350 }
 351
 352 static inline int
 353 switchdev_handle_port_obj_add(struct net_device *dev,
 354                         struct switchdev_notifier_port_obj_info *port_obj_info,
 355                         bool (*check_cb)(const struct net_device *dev),
 356                         int (*add_cb)(struct net_device *dev, const void *ctx,
 357                                       const struct switchdev_obj *obj,
 358                                       struct netlink_ext_ack *extack))
 359 {
 360         return 0;
 361 }
 362
 363 static inline int
 364 switchdev_handle_port_obj_del(struct net_device *dev,
 365                         struct switchdev_notifier_port_obj_info *port_obj_info,
 366                         bool (*check_cb)(const struct net_device *dev),
 367                         int (*del_cb)(struct net_device *dev, const void *ctx,
 368                                       const struct switchdev_obj *obj))
 369 {
 370         return 0;
 371 }
 372
 373 static inline int
 374 switchdev_handle_port_attr_set(struct net_device *dev,
 375                         struct switchdev_notifier_port_attr_info *port_attr_info,
 376                         bool (*check_cb)(const struct net_device *dev),
 377                         int (*set_cb)(struct net_device *dev, const void *ctx,
 378                                       const struct switchdev_attr *attr,
 379                                       struct netlink_ext_ack *extack))
 380 {
 381         return 0;
 382 }
 383 #endif
 384
 385 #endif /* _LINUX_SWITCHDEV_H_ */