net/dsa/dsa_priv.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * net/dsa/dsa_priv.h - Hardware switch handling
   4  * Copyright (c) 2008-2009 Marvell Semiconductor
   5  */
   6
   7 #ifndef __DSA_PRIV_H
   8 #define __DSA_PRIV_H
   9
  10 #include <linux/if_bridge.h>
  11 #include <linux/phy.h>
  12 #include <linux/netdevice.h>
  13 #include <linux/netpoll.h>
  14 #include <net/dsa.h>
  15 #include <net/gro_cells.h>
  16
  17 #define DSA_MAX_NUM_OFFLOADING_BRIDGES          BITS_PER_LONG
  18
  19 enum {
  20         DSA_NOTIFIER_AGEING_TIME,
  21         DSA_NOTIFIER_BRIDGE_JOIN,
  22         DSA_NOTIFIER_BRIDGE_LEAVE,
  23         DSA_NOTIFIER_FDB_ADD,
  24         DSA_NOTIFIER_FDB_DEL,
  25         DSA_NOTIFIER_HOST_FDB_ADD,
  26         DSA_NOTIFIER_HOST_FDB_DEL,
  27         DSA_NOTIFIER_HSR_JOIN,
  28         DSA_NOTIFIER_HSR_LEAVE,
  29         DSA_NOTIFIER_LAG_CHANGE,
  30         DSA_NOTIFIER_LAG_JOIN,
  31         DSA_NOTIFIER_LAG_LEAVE,
  32         DSA_NOTIFIER_MDB_ADD,
  33         DSA_NOTIFIER_MDB_DEL,
  34         DSA_NOTIFIER_HOST_MDB_ADD,
  35         DSA_NOTIFIER_HOST_MDB_DEL,
  36         DSA_NOTIFIER_VLAN_ADD,
  37         DSA_NOTIFIER_VLAN_DEL,
  38         DSA_NOTIFIER_MTU,
  39         DSA_NOTIFIER_TAG_PROTO,
  40         DSA_NOTIFIER_MRP_ADD,
  41         DSA_NOTIFIER_MRP_DEL,
  42         DSA_NOTIFIER_MRP_ADD_RING_ROLE,
  43         DSA_NOTIFIER_MRP_DEL_RING_ROLE,
  44         DSA_NOTIFIER_TAG_8021Q_VLAN_ADD,
  45         DSA_NOTIFIER_TAG_8021Q_VLAN_DEL,
  46 };
  47
  48 /* DSA_NOTIFIER_AGEING_TIME */
  49 struct dsa_notifier_ageing_time_info {
  50         unsigned int ageing_time;
  51 };
  52
  53 /* DSA_NOTIFIER_BRIDGE_* */
  54 struct dsa_notifier_bridge_info {
  55         struct net_device *br;
  56         int tree_index;
  57         int sw_index;
  58         int port;
  59 };
  60
  61 /* DSA_NOTIFIER_FDB_* */
  62 struct dsa_notifier_fdb_info {
  63         int sw_index;
  64         int port;
  65         const unsigned char *addr;
  66         u16 vid;
  67 };
  68
  69 /* DSA_NOTIFIER_MDB_* */
  70 struct dsa_notifier_mdb_info {
  71         const struct switchdev_obj_port_mdb *mdb;
  72         int sw_index;
  73         int port;
  74 };
  75
  76 /* DSA_NOTIFIER_LAG_* */
  77 struct dsa_notifier_lag_info {
  78         struct net_device *lag;
  79         int sw_index;
  80         int port;
  81
  82         struct netdev_lag_upper_info *info;
  83 };
  84
  85 /* DSA_NOTIFIER_VLAN_* */
  86 struct dsa_notifier_vlan_info {
  87         const struct switchdev_obj_port_vlan *vlan;
  88         int sw_index;
  89         int port;
  90         struct netlink_ext_ack *extack;
  91 };
  92
  93 /* DSA_NOTIFIER_MTU */
  94 struct dsa_notifier_mtu_info {
  95         bool targeted_match;
  96         int sw_index;
  97         int port;
  98         int mtu;
  99 };
 100
 101 /* DSA_NOTIFIER_TAG_PROTO_* */
 102 struct dsa_notifier_tag_proto_info {
 103         const struct dsa_device_ops *tag_ops;
 104 };
 105
 106 /* DSA_NOTIFIER_MRP_* */
 107 struct dsa_notifier_mrp_info {
 108         const struct switchdev_obj_mrp *mrp;
 109         int sw_index;
 110         int port;
 111 };
 112
 113 /* DSA_NOTIFIER_MRP_* */
 114 struct dsa_notifier_mrp_ring_role_info {
 115         const struct switchdev_obj_ring_role_mrp *mrp;
 116         int sw_index;
 117         int port;
 118 };
 119
 120 /* DSA_NOTIFIER_TAG_8021Q_VLAN_* */
 121 struct dsa_notifier_tag_8021q_vlan_info {
 122         int tree_index;
 123         int sw_index;
 124         int port;
 125         u16 vid;
 126 };
 127
 128 struct dsa_switchdev_event_work {
 129         struct dsa_switch *ds;
 130         int port;
 131         struct net_device *dev;
 132         struct work_struct work;
 133         unsigned long event;
 134         /* Specific for SWITCHDEV_FDB_ADD_TO_DEVICE and
 135          * SWITCHDEV_FDB_DEL_TO_DEVICE
 136          */
 137         unsigned char addr[ETH_ALEN];
 138         u16 vid;
 139         bool host_addr;
 140 };
 141
 142 /* DSA_NOTIFIER_HSR_* */
 143 struct dsa_notifier_hsr_info {
 144         struct net_device *hsr;
 145         int sw_index;
 146         int port;
 147 };
 148
 149 struct dsa_slave_priv {
 150         /* Copy of CPU port xmit for faster access in slave transmit hot path */
 151         struct sk_buff *        (*xmit)(struct sk_buff *skb,
 152                                         struct net_device *dev);
 153
 154         struct gro_cells        gcells;
 155
 156         /* DSA port data, such as switch, port index, etc. */
 157         struct dsa_port         *dp;
 158
 159 #ifdef CONFIG_NET_POLL_CONTROLLER
 160         struct netpoll          *netpoll;
 161 #endif
 162
 163         /* TC context */
 164         struct list_head        mall_tc_list;
 165 };
 166
 167 /* dsa.c */
 168 const struct dsa_device_ops *dsa_tag_driver_get(int tag_protocol);
 169 void dsa_tag_driver_put(const struct dsa_device_ops *ops);
 170 const struct dsa_device_ops *dsa_find_tagger_by_name(const char *buf);
 171
 172 bool dsa_schedule_work(struct work_struct *work);
 173 void dsa_flush_workqueue(void);
 174 const char *dsa_tag_protocol_to_str(const struct dsa_device_ops *ops);
 175
 176 static inline int dsa_tag_protocol_overhead(const struct dsa_device_ops *ops)
 177 {
 178         return ops->needed_headroom + ops->needed_tailroom;
 179 }
 180
 181 /* master.c */
 182 int dsa_master_setup(struct net_device *dev, struct dsa_port *cpu_dp);
 183 void dsa_master_teardown(struct net_device *dev);
 184
 185 static inline struct net_device *dsa_master_find_slave(struct net_device *dev,
 186                                                        int device, int port)
 187 {
 188         struct dsa_port *cpu_dp = dev->dsa_ptr;
 189         struct dsa_switch_tree *dst = cpu_dp->dst;
 190         struct dsa_port *dp;
 191
 192         list_for_each_entry(dp, &dst->ports, list)
 193                 if (dp->ds->index == device && dp->index == port &&
 194                     dp->type == DSA_PORT_TYPE_USER)
 195                         return dp->slave;
 196
 197         return NULL;
 198 }
 199
 200 /* port.c */
 201 void dsa_port_set_tag_protocol(struct dsa_port *cpu_dp,
 202                                const struct dsa_device_ops *tag_ops);
 203 int dsa_port_set_state(struct dsa_port *dp, u8 state, bool do_fast_age);
 204 int dsa_port_enable_rt(struct dsa_port *dp, struct phy_device *phy);
 205 int dsa_port_enable(struct dsa_port *dp, struct phy_device *phy);
 206 void dsa_port_disable_rt(struct dsa_port *dp);
 207 void dsa_port_disable(struct dsa_port *dp);
 208 int dsa_port_bridge_join(struct dsa_port *dp, struct net_device *br,
 209                          struct netlink_ext_ack *extack);
 210 void dsa_port_pre_bridge_leave(struct dsa_port *dp, struct net_device *br);
 211 void dsa_port_bridge_leave(struct dsa_port *dp, struct net_device *br);
 212 int dsa_port_lag_change(struct dsa_port *dp,
 213                         struct netdev_lag_lower_state_info *linfo);
 214 int dsa_port_lag_join(struct dsa_port *dp, struct net_device *lag_dev,
 215                       struct netdev_lag_upper_info *uinfo,
 216                       struct netlink_ext_ack *extack);
 217 void dsa_port_pre_lag_leave(struct dsa_port *dp, struct net_device *lag_dev);
 218 void dsa_port_lag_leave(struct dsa_port *dp, struct net_device *lag_dev);
 219 int dsa_port_vlan_filtering(struct dsa_port *dp, bool vlan_filtering,
 220                             struct netlink_ext_ack *extack);
 221 bool dsa_port_skip_vlan_configuration(struct dsa_port *dp);
 222 int dsa_port_ageing_time(struct dsa_port *dp, clock_t ageing_clock);
 223 int dsa_port_mtu_change(struct dsa_port *dp, int new_mtu,
 224                         bool targeted_match);
 225 int dsa_port_fdb_add(struct dsa_port *dp, const unsigned char *addr,
 226                      u16 vid);
 227 int dsa_port_fdb_del(struct dsa_port *dp, const unsigned char *addr,
 228                      u16 vid);
 229 int dsa_port_host_fdb_add(struct dsa_port *dp, const unsigned char *addr,
 230                           u16 vid);
 231 int dsa_port_host_fdb_del(struct dsa_port *dp, const unsigned char *addr,
 232                           u16 vid);
 233 int dsa_port_fdb_dump(struct dsa_port *dp, dsa_fdb_dump_cb_t *cb, void *data);
 234 int dsa_port_mdb_add(const struct dsa_port *dp,
 235                      const struct switchdev_obj_port_mdb *mdb);
 236 int dsa_port_mdb_del(const struct dsa_port *dp,
 237                      const struct switchdev_obj_port_mdb *mdb);
 238 int dsa_port_host_mdb_add(const struct dsa_port *dp,
 239                           const struct switchdev_obj_port_mdb *mdb);
 240 int dsa_port_host_mdb_del(const struct dsa_port *dp,
 241                           const struct switchdev_obj_port_mdb *mdb);
 242 int dsa_port_pre_bridge_flags(const struct dsa_port *dp,
 243                               struct switchdev_brport_flags flags,
 244                               struct netlink_ext_ack *extack);
 245 int dsa_port_bridge_flags(struct dsa_port *dp,
 246                           struct switchdev_brport_flags flags,
 247                           struct netlink_ext_ack *extack);
 248 int dsa_port_vlan_add(struct dsa_port *dp,
 249                       const struct switchdev_obj_port_vlan *vlan,
 250                       struct netlink_ext_ack *extack);
 251 int dsa_port_vlan_del(struct dsa_port *dp,
 252                       const struct switchdev_obj_port_vlan *vlan);
 253 int dsa_port_mrp_add(const struct dsa_port *dp,
 254                      const struct switchdev_obj_mrp *mrp);
 255 int dsa_port_mrp_del(const struct dsa_port *dp,
 256                      const struct switchdev_obj_mrp *mrp);
 257 int dsa_port_mrp_add_ring_role(const struct dsa_port *dp,
 258                                const struct switchdev_obj_ring_role_mrp *mrp);
 259 int dsa_port_mrp_del_ring_role(const struct dsa_port *dp,
 260                                const struct switchdev_obj_ring_role_mrp *mrp);
 261 int dsa_port_link_register_of(struct dsa_port *dp);
 262 void dsa_port_link_unregister_of(struct dsa_port *dp);
 263 int dsa_port_hsr_join(struct dsa_port *dp, struct net_device *hsr);
 264 void dsa_port_hsr_leave(struct dsa_port *dp, struct net_device *hsr);
 265 int dsa_port_tag_8021q_vlan_add(struct dsa_port *dp, u16 vid, bool broadcast);
 266 void dsa_port_tag_8021q_vlan_del(struct dsa_port *dp, u16 vid, bool broadcast);
 267 extern const struct phylink_mac_ops dsa_port_phylink_mac_ops;
 268
 269 static inline bool dsa_port_offloads_bridge_port(struct dsa_port *dp,
 270                                                  const struct net_device *dev)
 271 {
 272         return dsa_port_to_bridge_port(dp) == dev;
 273 }
 274
 275 static inline bool dsa_port_offloads_bridge(struct dsa_port *dp,
 276                                             const struct net_device *bridge_dev)
 277 {
 278         /* DSA ports connected to a bridge, and event was emitted
 279          * for the bridge.
 280          */
 281         return dp->bridge_dev == bridge_dev;
 282 }
 283
 284 /* Returns true if any port of this tree offloads the given net_device */
 285 static inline bool dsa_tree_offloads_bridge_port(struct dsa_switch_tree *dst,
 286                                                  const struct net_device *dev)
 287 {
 288         struct dsa_port *dp;
 289
 290         list_for_each_entry(dp, &dst->ports, list)
 291                 if (dsa_port_offloads_bridge_port(dp, dev))
 292                         return true;
 293
 294         return false;
 295 }
 296
 297 /* Returns true if any port of this tree offloads the given bridge */
 298 static inline bool dsa_tree_offloads_bridge(struct dsa_switch_tree *dst,
 299                                             const struct net_device *bridge_dev)
 300 {
 301         struct dsa_port *dp;
 302
 303         list_for_each_entry(dp, &dst->ports, list)
 304                 if (dsa_port_offloads_bridge(dp, bridge_dev))
 305                         return true;
 306
 307         return false;
 308 }
 309
 310 /* slave.c */
 311 extern const struct dsa_device_ops notag_netdev_ops;
 312 extern struct notifier_block dsa_slave_switchdev_notifier;
 313 extern struct notifier_block dsa_slave_switchdev_blocking_notifier;
 314
 315 void dsa_slave_mii_bus_init(struct dsa_switch *ds);
 316 int dsa_slave_create(struct dsa_port *dp);
 317 void dsa_slave_destroy(struct net_device *slave_dev);
 318 int dsa_slave_suspend(struct net_device *slave_dev);
 319 int dsa_slave_resume(struct net_device *slave_dev);
 320 int dsa_slave_register_notifier(void);
 321 void dsa_slave_unregister_notifier(void);
 322 void dsa_slave_setup_tagger(struct net_device *slave);
 323 int dsa_slave_change_mtu(struct net_device *dev, int new_mtu);
 324 int dsa_slave_manage_vlan_filtering(struct net_device *dev,
 325                                     bool vlan_filtering);
 326
 327 static inline struct dsa_port *dsa_slave_to_port(const struct net_device *dev)
 328 {
 329         struct dsa_slave_priv *p = netdev_priv(dev);
 330
 331         return p->dp;
 332 }
 333
 334 static inline struct net_device *
 335 dsa_slave_to_master(const struct net_device *dev)
 336 {
 337         struct dsa_port *dp = dsa_slave_to_port(dev);
 338
 339         return dp->cpu_dp->master;
 340 }
 341
 342 /* If under a bridge with vlan_filtering=0, make sure to send pvid-tagged
 343  * frames as untagged, since the bridge will not untag them.
 344  */
 345 static inline struct sk_buff *dsa_untag_bridge_pvid(struct sk_buff *skb)
 346 {
 347         struct dsa_port *dp = dsa_slave_to_port(skb->dev);
 348         struct net_device *br = dp->bridge_dev;
 349         struct net_device *dev = skb->dev;
 350         struct net_device *upper_dev;
 351         u16 vid, pvid, proto;
 352         int err;
 353
 354         if (!br || br_vlan_enabled(br))
 355                 return skb;
 356
 357         err = br_vlan_get_proto(br, &proto);
 358         if (err)
 359                 return skb;
 360
 361         /* Move VLAN tag from data to hwaccel */
 362         if (!skb_vlan_tag_present(skb) && skb->protocol == htons(proto)) {
 363                 skb = skb_vlan_untag(skb);
 364                 if (!skb)
 365                         return NULL;
 366         }
 367
 368         if (!skb_vlan_tag_present(skb))
 369                 return skb;
 370
 371         vid = skb_vlan_tag_get_id(skb);
 372
 373         /* We already run under an RCU read-side critical section since
 374          * we are called from netif_receive_skb_list_internal().
 375          */
 376         err = br_vlan_get_pvid_rcu(dev, &pvid);
 377         if (err)
 378                 return skb;
 379
 380         if (vid != pvid)
 381                 return skb;
 382
 383         /* The sad part about attempting to untag from DSA is that we
 384          * don't know, unless we check, if the skb will end up in
 385          * the bridge's data path - br_allowed_ingress() - or not.
 386          * For example, there might be an 8021q upper for the
 387          * default_pvid of the bridge, which will steal VLAN-tagged traffic
 388          * from the bridge's data path. This is a configuration that DSA
 389          * supports because vlan_filtering is 0. In that case, we should
 390          * definitely keep the tag, to make sure it keeps working.
 391          */
 392         upper_dev = __vlan_find_dev_deep_rcu(br, htons(proto), vid);
 393         if (upper_dev)
 394                 return skb;
 395
 396         __vlan_hwaccel_clear_tag(skb);
 397
 398         return skb;
 399 }
 400
 401 /* For switches without hardware support for DSA tagging to be able
 402  * to support termination through the bridge.
 403  */
 404 static inline struct net_device *
 405 dsa_find_designated_bridge_port_by_vid(struct net_device *master, u16 vid)
 406 {
 407         struct dsa_port *cpu_dp = master->dsa_ptr;
 408         struct dsa_switch_tree *dst = cpu_dp->dst;
 409         struct bridge_vlan_info vinfo;
 410         struct net_device *slave;
 411         struct dsa_port *dp;
 412         int err;
 413
 414         list_for_each_entry(dp, &dst->ports, list) {
 415                 if (dp->type != DSA_PORT_TYPE_USER)
 416                         continue;
 417
 418                 if (!dp->bridge_dev)
 419                         continue;
 420
 421                 if (dp->stp_state != BR_STATE_LEARNING &&
 422                     dp->stp_state != BR_STATE_FORWARDING)
 423                         continue;
 424
 425                 /* Since the bridge might learn this packet, keep the CPU port
 426                  * affinity with the port that will be used for the reply on
 427                  * xmit.
 428                  */
 429                 if (dp->cpu_dp != cpu_dp)
 430                         continue;
 431
 432                 slave = dp->slave;
 433
 434                 err = br_vlan_get_info_rcu(slave, vid, &vinfo);
 435                 if (err)
 436                         continue;
 437
 438                 return slave;
 439         }
 440
 441         return NULL;
 442 }
 443
 444 /* If the ingress port offloads the bridge, we mark the frame as autonomously
 445  * forwarded by hardware, so the software bridge doesn't forward in twice, back
 446  * to us, because we already did. However, if we're in fallback mode and we do
 447  * software bridging, we are not offloading it, therefore the dp->bridge_dev
 448  * pointer is not populated, and flooding needs to be done by software (we are
 449  * effectively operating in standalone ports mode).
 450  */
 451 static inline void dsa_default_offload_fwd_mark(struct sk_buff *skb)
 452 {
 453         struct dsa_port *dp = dsa_slave_to_port(skb->dev);
 454
 455         skb->offload_fwd_mark = !!(dp->bridge_dev);
 456 }
 457
 458 /* Helper for removing DSA header tags from packets in the RX path.
 459  * Must not be called before skb_pull(len).
 460  *                                                                 skb->data
 461  *                                                                         |
 462  *                                                                         v
 463  * |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
 464  * +-----------------------+-----------------------+---------------+-------+
 465  * |    Destination MAC    |      Source MAC       |  DSA header   | EType |
 466  * +-----------------------+-----------------------+---------------+-------+
 467  *                                                 |               |
 468  * <----- len ----->                               <----- len ----->
 469  *                 |
 470  *       >>>>>>>   v
 471  *       >>>>>>>   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
 472  *       >>>>>>>   +-----------------------+-----------------------+-------+
 473  *       >>>>>>>   |    Destination MAC    |      Source MAC       | EType |
 474  *                 +-----------------------+-----------------------+-------+
 475  *                                                                         ^
 476  *                                                                         |
 477  *                                                                 skb->data
 478  */
 479 static inline void dsa_strip_etype_header(struct sk_buff *skb, int len)
 480 {
 481         memmove(skb->data - ETH_HLEN, skb->data - ETH_HLEN - len, 2 * ETH_ALEN);
 482 }
 483
 484 /* Helper for creating space for DSA header tags in TX path packets.
 485  * Must not be called before skb_push(len).
 486  *
 487  * Before:
 488  *
 489  *       <<<<<<<   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
 490  * ^     <<<<<<<   +-----------------------+-----------------------+-------+
 491  * |     <<<<<<<   |    Destination MAC    |      Source MAC       | EType |
 492  * |               +-----------------------+-----------------------+-------+
 493  * <----- len ----->
 494  * |
 495  * |
 496  * skb->data
 497  *
 498  * After:
 499  *
 500  * |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
 501  * +-----------------------+-----------------------+---------------+-------+
 502  * |    Destination MAC    |      Source MAC       |  DSA header   | EType |
 503  * +-----------------------+-----------------------+---------------+-------+
 504  * ^                                               |               |
 505  * |                                               <----- len ----->
 506  * skb->data
 507  */
 508 static inline void dsa_alloc_etype_header(struct sk_buff *skb, int len)
 509 {
 510         memmove(skb->data, skb->data + len, 2 * ETH_ALEN);
 511 }
 512
 513 /* On RX, eth_type_trans() on the DSA master pulls ETH_HLEN bytes starting from
 514  * skb_mac_header(skb), which leaves skb->data pointing at the first byte after
 515  * what the DSA master perceives as the EtherType (the beginning of the L3
 516  * protocol). Since DSA EtherType header taggers treat the EtherType as part of
 517  * the DSA tag itself, and the EtherType is 2 bytes in length, the DSA header
 518  * is located 2 bytes behind skb->data. Note that EtherType in this context
 519  * means the first 2 bytes of the DSA header, not the encapsulated EtherType
 520  * that will become visible after the DSA header is stripped.
 521  */
 522 static inline void *dsa_etype_header_pos_rx(struct sk_buff *skb)
 523 {
 524         return skb->data - 2;
 525 }
 526
 527 /* On TX, skb->data points to skb_mac_header(skb), which means that EtherType
 528  * header taggers start exactly where the EtherType is (the EtherType is
 529  * treated as part of the DSA header).
 530  */
 531 static inline void *dsa_etype_header_pos_tx(struct sk_buff *skb)
 532 {
 533         return skb->data + 2 * ETH_ALEN;
 534 }
 535
 536 /* switch.c */
 537 int dsa_switch_register_notifier(struct dsa_switch *ds);
 538 void dsa_switch_unregister_notifier(struct dsa_switch *ds);
 539
 540 /* dsa2.c */
 541 void dsa_lag_map(struct dsa_switch_tree *dst, struct net_device *lag);
 542 void dsa_lag_unmap(struct dsa_switch_tree *dst, struct net_device *lag);
 543 int dsa_tree_notify(struct dsa_switch_tree *dst, unsigned long e, void *v);
 544 int dsa_broadcast(unsigned long e, void *v);
 545 int dsa_tree_change_tag_proto(struct dsa_switch_tree *dst,
 546                               struct net_device *master,
 547                               const struct dsa_device_ops *tag_ops,
 548                               const struct dsa_device_ops *old_tag_ops);
 549 int dsa_bridge_num_get(const struct net_device *bridge_dev, int max);
 550 void dsa_bridge_num_put(const struct net_device *bridge_dev, int bridge_num);
 551
 552 /* tag_8021q.c */
 553 int dsa_tag_8021q_bridge_join(struct dsa_switch *ds,
 554                               struct dsa_notifier_bridge_info *info);
 555 int dsa_tag_8021q_bridge_leave(struct dsa_switch *ds,
 556                                struct dsa_notifier_bridge_info *info);
 557 int dsa_switch_tag_8021q_vlan_add(struct dsa_switch *ds,
 558                                   struct dsa_notifier_tag_8021q_vlan_info *info);
 559 int dsa_switch_tag_8021q_vlan_del(struct dsa_switch *ds,
 560                                   struct dsa_notifier_tag_8021q_vlan_info *info);
 561
 562 extern struct list_head dsa_tree_list;
 563
 564 #endif