br_private.h 22 KB

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  1. /*
  2. * Linux ethernet bridge
  3. *
  4. * Authors:
  5. * Lennert Buytenhek <buytenh@gnu.org>
  6. *
  7. * This program is free software; you can redistribute it and/or
  8. * modify it under the terms of the GNU General Public License
  9. * as published by the Free Software Foundation; either version
  10. * 2 of the License, or (at your option) any later version.
  11. */
  12. #ifndef _BR_PRIVATE_H
  13. #define _BR_PRIVATE_H
  14. #include <linux/netdevice.h>
  15. #include <linux/if_bridge.h>
  16. #include <linux/netpoll.h>
  17. #include <linux/u64_stats_sync.h>
  18. #include <net/route.h>
  19. #include <linux/if_vlan.h>
  20. #define BR_HASH_BITS 8
  21. #define BR_HASH_SIZE (1 << BR_HASH_BITS)
  22. #define BR_HOLD_TIME (1*HZ)
  23. #define BR_PORT_BITS 10
  24. #define BR_MAX_PORTS (1<<BR_PORT_BITS)
  25. #define BR_VLAN_BITMAP_LEN BITS_TO_LONGS(VLAN_N_VID)
  26. #define BR_VERSION "2.3"
  27. /* Control of forwarding link local multicast */
  28. #define BR_GROUPFWD_DEFAULT 0
  29. /* Don't allow forwarding control protocols like STP and LLDP */
  30. #define BR_GROUPFWD_RESTRICTED 0x4007u
  31. /* Path to usermode spanning tree program */
  32. #define BR_STP_PROG "/sbin/bridge-stp"
  33. typedef struct bridge_id bridge_id;
  34. typedef struct mac_addr mac_addr;
  35. typedef __u16 port_id;
  36. struct bridge_id
  37. {
  38. unsigned char prio[2];
  39. unsigned char addr[6];
  40. };
  41. struct mac_addr
  42. {
  43. unsigned char addr[6];
  44. };
  45. struct br_ip
  46. {
  47. union {
  48. __be32 ip4;
  49. #if IS_ENABLED(CONFIG_IPV6)
  50. struct in6_addr ip6;
  51. #endif
  52. } u;
  53. __be16 proto;
  54. __u16 vid;
  55. };
  56. #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
  57. /* our own querier */
  58. struct bridge_mcast_query {
  59. struct timer_list timer;
  60. u32 startup_sent;
  61. };
  62. /* other querier */
  63. struct bridge_mcast_querier {
  64. struct timer_list timer;
  65. unsigned long delay_time;
  66. };
  67. #endif
  68. struct net_port_vlans {
  69. u16 port_idx;
  70. u16 pvid;
  71. union {
  72. struct net_bridge_port *port;
  73. struct net_bridge *br;
  74. } parent;
  75. struct rcu_head rcu;
  76. unsigned long vlan_bitmap[BR_VLAN_BITMAP_LEN];
  77. unsigned long untagged_bitmap[BR_VLAN_BITMAP_LEN];
  78. u16 num_vlans;
  79. };
  80. struct net_bridge_fdb_entry
  81. {
  82. struct hlist_node hlist;
  83. struct net_bridge_port *dst;
  84. struct rcu_head rcu;
  85. unsigned long updated;
  86. unsigned long used;
  87. mac_addr addr;
  88. unsigned char is_local;
  89. unsigned char is_static;
  90. __u16 vlan_id;
  91. };
  92. struct net_bridge_port_group {
  93. struct net_bridge_port *port;
  94. struct net_bridge_port_group __rcu *next;
  95. struct hlist_node mglist;
  96. struct rcu_head rcu;
  97. struct timer_list timer;
  98. struct br_ip addr;
  99. unsigned char state;
  100. };
  101. struct net_bridge_mdb_entry
  102. {
  103. struct hlist_node hlist[2];
  104. struct net_bridge *br;
  105. struct net_bridge_port_group __rcu *ports;
  106. struct rcu_head rcu;
  107. struct timer_list timer;
  108. struct br_ip addr;
  109. bool mglist;
  110. bool timer_armed;
  111. };
  112. struct net_bridge_mdb_htable
  113. {
  114. struct hlist_head *mhash;
  115. struct rcu_head rcu;
  116. struct net_bridge_mdb_htable *old;
  117. u32 size;
  118. u32 max;
  119. u32 secret;
  120. u32 ver;
  121. };
  122. struct net_bridge_port
  123. {
  124. struct net_bridge *br;
  125. struct net_device *dev;
  126. struct list_head list;
  127. /* STP */
  128. u8 priority;
  129. u8 state;
  130. u16 port_no;
  131. unsigned char topology_change_ack;
  132. unsigned char config_pending;
  133. port_id port_id;
  134. port_id designated_port;
  135. bridge_id designated_root;
  136. bridge_id designated_bridge;
  137. u32 path_cost;
  138. u32 designated_cost;
  139. unsigned long designated_age;
  140. struct timer_list forward_delay_timer;
  141. struct timer_list hold_timer;
  142. struct timer_list message_age_timer;
  143. struct kobject kobj;
  144. struct rcu_head rcu;
  145. unsigned long flags;
  146. #define BR_HAIRPIN_MODE 0x00000001
  147. #define BR_BPDU_GUARD 0x00000002
  148. #define BR_ROOT_BLOCK 0x00000004
  149. #define BR_MULTICAST_FAST_LEAVE 0x00000008
  150. #define BR_ADMIN_COST 0x00000010
  151. #define BR_LEARNING 0x00000020
  152. #define BR_FLOOD 0x00000040
  153. #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
  154. struct bridge_mcast_query ip4_query;
  155. #if IS_ENABLED(CONFIG_IPV6)
  156. struct bridge_mcast_query ip6_query;
  157. #endif /* IS_ENABLED(CONFIG_IPV6) */
  158. unsigned char multicast_router;
  159. struct timer_list multicast_router_timer;
  160. struct hlist_head mglist;
  161. struct hlist_node rlist;
  162. #endif
  163. #ifdef CONFIG_SYSFS
  164. char sysfs_name[IFNAMSIZ];
  165. #endif
  166. #ifdef CONFIG_NET_POLL_CONTROLLER
  167. struct netpoll *np;
  168. #endif
  169. #ifdef CONFIG_BRIDGE_VLAN_FILTERING
  170. struct net_port_vlans __rcu *vlan_info;
  171. #endif
  172. };
  173. #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
  174. static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
  175. {
  176. struct net_bridge_port *port =
  177. rcu_dereference_rtnl(dev->rx_handler_data);
  178. return br_port_exists(dev) ? port : NULL;
  179. }
  180. static inline struct net_bridge_port *br_port_get_rtnl(struct net_device *dev)
  181. {
  182. return br_port_exists(dev) ?
  183. rtnl_dereference(dev->rx_handler_data) : NULL;
  184. }
  185. struct br_cpu_netstats {
  186. u64 rx_packets;
  187. u64 rx_bytes;
  188. u64 tx_packets;
  189. u64 tx_bytes;
  190. struct u64_stats_sync syncp;
  191. };
  192. struct net_bridge
  193. {
  194. spinlock_t lock;
  195. struct list_head port_list;
  196. struct net_device *dev;
  197. struct br_cpu_netstats __percpu *stats;
  198. spinlock_t hash_lock;
  199. struct hlist_head hash[BR_HASH_SIZE];
  200. #ifdef CONFIG_BRIDGE_NETFILTER
  201. struct rtable fake_rtable;
  202. bool nf_call_iptables;
  203. bool nf_call_ip6tables;
  204. bool nf_call_arptables;
  205. #endif
  206. u16 group_fwd_mask;
  207. /* STP */
  208. bridge_id designated_root;
  209. bridge_id bridge_id;
  210. u32 root_path_cost;
  211. unsigned long max_age;
  212. unsigned long hello_time;
  213. unsigned long forward_delay;
  214. unsigned long bridge_max_age;
  215. unsigned long ageing_time;
  216. unsigned long bridge_hello_time;
  217. unsigned long bridge_forward_delay;
  218. u8 group_addr[ETH_ALEN];
  219. u16 root_port;
  220. enum {
  221. BR_NO_STP, /* no spanning tree */
  222. BR_KERNEL_STP, /* old STP in kernel */
  223. BR_USER_STP, /* new RSTP in userspace */
  224. } stp_enabled;
  225. unsigned char topology_change;
  226. unsigned char topology_change_detected;
  227. #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
  228. unsigned char multicast_router;
  229. u8 multicast_disabled:1;
  230. u8 multicast_querier:1;
  231. u8 multicast_query_use_ifaddr:1;
  232. u32 hash_elasticity;
  233. u32 hash_max;
  234. u32 multicast_last_member_count;
  235. u32 multicast_startup_query_count;
  236. unsigned long multicast_last_member_interval;
  237. unsigned long multicast_membership_interval;
  238. unsigned long multicast_querier_interval;
  239. unsigned long multicast_query_interval;
  240. unsigned long multicast_query_response_interval;
  241. unsigned long multicast_startup_query_interval;
  242. spinlock_t multicast_lock;
  243. struct net_bridge_mdb_htable __rcu *mdb;
  244. struct hlist_head router_list;
  245. struct timer_list multicast_router_timer;
  246. struct bridge_mcast_querier ip4_querier;
  247. struct bridge_mcast_query ip4_query;
  248. #if IS_ENABLED(CONFIG_IPV6)
  249. struct bridge_mcast_querier ip6_querier;
  250. struct bridge_mcast_query ip6_query;
  251. #endif /* IS_ENABLED(CONFIG_IPV6) */
  252. #endif
  253. struct timer_list hello_timer;
  254. struct timer_list tcn_timer;
  255. struct timer_list topology_change_timer;
  256. struct timer_list gc_timer;
  257. struct kobject *ifobj;
  258. #ifdef CONFIG_BRIDGE_VLAN_FILTERING
  259. u8 vlan_enabled;
  260. struct net_port_vlans __rcu *vlan_info;
  261. #endif
  262. };
  263. struct br_input_skb_cb {
  264. struct net_device *brdev;
  265. #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
  266. int igmp;
  267. int mrouters_only;
  268. #endif
  269. };
  270. #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
  271. #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
  272. # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
  273. #else
  274. # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
  275. #endif
  276. #define br_printk(level, br, format, args...) \
  277. printk(level "%s: " format, (br)->dev->name, ##args)
  278. #define br_err(__br, format, args...) \
  279. br_printk(KERN_ERR, __br, format, ##args)
  280. #define br_warn(__br, format, args...) \
  281. br_printk(KERN_WARNING, __br, format, ##args)
  282. #define br_notice(__br, format, args...) \
  283. br_printk(KERN_NOTICE, __br, format, ##args)
  284. #define br_info(__br, format, args...) \
  285. br_printk(KERN_INFO, __br, format, ##args)
  286. #define br_debug(br, format, args...) \
  287. pr_debug("%s: " format, (br)->dev->name, ##args)
  288. extern struct notifier_block br_device_notifier;
  289. /* called under bridge lock */
  290. static inline int br_is_root_bridge(const struct net_bridge *br)
  291. {
  292. return !memcmp(&br->bridge_id, &br->designated_root, 8);
  293. }
  294. /* br_device.c */
  295. extern void br_dev_setup(struct net_device *dev);
  296. extern void br_dev_delete(struct net_device *dev, struct list_head *list);
  297. extern netdev_tx_t br_dev_xmit(struct sk_buff *skb,
  298. struct net_device *dev);
  299. #ifdef CONFIG_NET_POLL_CONTROLLER
  300. static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
  301. struct sk_buff *skb)
  302. {
  303. struct netpoll *np = p->np;
  304. if (np)
  305. netpoll_send_skb(np, skb);
  306. }
  307. extern int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp);
  308. extern void br_netpoll_disable(struct net_bridge_port *p);
  309. #else
  310. static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
  311. struct sk_buff *skb)
  312. {
  313. }
  314. static inline int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp)
  315. {
  316. return 0;
  317. }
  318. static inline void br_netpoll_disable(struct net_bridge_port *p)
  319. {
  320. }
  321. #endif
  322. /* br_fdb.c */
  323. extern int br_fdb_init(void);
  324. extern void br_fdb_fini(void);
  325. extern void br_fdb_flush(struct net_bridge *br);
  326. extern void br_fdb_changeaddr(struct net_bridge_port *p,
  327. const unsigned char *newaddr);
  328. extern void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
  329. extern void br_fdb_cleanup(unsigned long arg);
  330. extern void br_fdb_delete_by_port(struct net_bridge *br,
  331. const struct net_bridge_port *p, int do_all);
  332. extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
  333. const unsigned char *addr,
  334. __u16 vid);
  335. extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
  336. extern int br_fdb_fillbuf(struct net_bridge *br, void *buf,
  337. unsigned long count, unsigned long off);
  338. extern int br_fdb_insert(struct net_bridge *br,
  339. struct net_bridge_port *source,
  340. const unsigned char *addr,
  341. u16 vid);
  342. extern void br_fdb_update(struct net_bridge *br,
  343. struct net_bridge_port *source,
  344. const unsigned char *addr,
  345. u16 vid);
  346. extern int fdb_delete_by_addr(struct net_bridge *br, const u8 *addr, u16 vid);
  347. extern int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
  348. struct net_device *dev,
  349. const unsigned char *addr);
  350. extern int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[],
  351. struct net_device *dev,
  352. const unsigned char *addr,
  353. u16 nlh_flags);
  354. extern int br_fdb_dump(struct sk_buff *skb,
  355. struct netlink_callback *cb,
  356. struct net_device *dev,
  357. int idx);
  358. /* br_forward.c */
  359. extern void br_deliver(const struct net_bridge_port *to,
  360. struct sk_buff *skb);
  361. extern int br_dev_queue_push_xmit(struct sk_buff *skb);
  362. extern void br_forward(const struct net_bridge_port *to,
  363. struct sk_buff *skb, struct sk_buff *skb0);
  364. extern int br_forward_finish(struct sk_buff *skb);
  365. extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb,
  366. bool unicast);
  367. extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
  368. struct sk_buff *skb2, bool unicast);
  369. /* br_if.c */
  370. extern void br_port_carrier_check(struct net_bridge_port *p);
  371. extern int br_add_bridge(struct net *net, const char *name);
  372. extern int br_del_bridge(struct net *net, const char *name);
  373. extern void br_net_exit(struct net *net);
  374. extern int br_add_if(struct net_bridge *br,
  375. struct net_device *dev);
  376. extern int br_del_if(struct net_bridge *br,
  377. struct net_device *dev);
  378. extern int br_min_mtu(const struct net_bridge *br);
  379. extern netdev_features_t br_features_recompute(struct net_bridge *br,
  380. netdev_features_t features);
  381. /* br_input.c */
  382. extern int br_handle_frame_finish(struct sk_buff *skb);
  383. extern rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
  384. /* br_ioctl.c */
  385. extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
  386. extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg);
  387. /* br_multicast.c */
  388. #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
  389. extern unsigned int br_mdb_rehash_seq;
  390. extern int br_multicast_rcv(struct net_bridge *br,
  391. struct net_bridge_port *port,
  392. struct sk_buff *skb);
  393. extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
  394. struct sk_buff *skb, u16 vid);
  395. extern void br_multicast_add_port(struct net_bridge_port *port);
  396. extern void br_multicast_del_port(struct net_bridge_port *port);
  397. extern void br_multicast_enable_port(struct net_bridge_port *port);
  398. extern void br_multicast_disable_port(struct net_bridge_port *port);
  399. extern void br_multicast_init(struct net_bridge *br);
  400. extern void br_multicast_open(struct net_bridge *br);
  401. extern void br_multicast_stop(struct net_bridge *br);
  402. extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
  403. struct sk_buff *skb);
  404. extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
  405. struct sk_buff *skb, struct sk_buff *skb2);
  406. extern int br_multicast_set_router(struct net_bridge *br, unsigned long val);
  407. extern int br_multicast_set_port_router(struct net_bridge_port *p,
  408. unsigned long val);
  409. extern int br_multicast_toggle(struct net_bridge *br, unsigned long val);
  410. extern int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
  411. extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
  412. extern struct net_bridge_mdb_entry *br_mdb_ip_get(
  413. struct net_bridge_mdb_htable *mdb,
  414. struct br_ip *dst);
  415. extern struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br,
  416. struct net_bridge_port *port, struct br_ip *group);
  417. extern void br_multicast_free_pg(struct rcu_head *head);
  418. extern struct net_bridge_port_group *br_multicast_new_port_group(
  419. struct net_bridge_port *port,
  420. struct br_ip *group,
  421. struct net_bridge_port_group __rcu *next,
  422. unsigned char state);
  423. extern void br_mdb_init(void);
  424. extern void br_mdb_uninit(void);
  425. extern void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
  426. struct br_ip *group, int type);
  427. #define mlock_dereference(X, br) \
  428. rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
  429. static inline bool br_multicast_is_router(struct net_bridge *br)
  430. {
  431. return br->multicast_router == 2 ||
  432. (br->multicast_router == 1 &&
  433. timer_pending(&br->multicast_router_timer));
  434. }
  435. static inline bool
  436. __br_multicast_querier_exists(struct net_bridge *br,
  437. struct bridge_mcast_querier *querier)
  438. {
  439. return time_is_before_jiffies(querier->delay_time) &&
  440. (br->multicast_querier || timer_pending(&querier->timer));
  441. }
  442. static inline bool br_multicast_querier_exists(struct net_bridge *br,
  443. struct ethhdr *eth)
  444. {
  445. switch (eth->h_proto) {
  446. case (htons(ETH_P_IP)):
  447. return __br_multicast_querier_exists(br, &br->ip4_querier);
  448. #if IS_ENABLED(CONFIG_IPV6)
  449. case (htons(ETH_P_IPV6)):
  450. return __br_multicast_querier_exists(br, &br->ip6_querier);
  451. #endif
  452. default:
  453. return false;
  454. }
  455. }
  456. #else
  457. static inline int br_multicast_rcv(struct net_bridge *br,
  458. struct net_bridge_port *port,
  459. struct sk_buff *skb)
  460. {
  461. return 0;
  462. }
  463. static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
  464. struct sk_buff *skb, u16 vid)
  465. {
  466. return NULL;
  467. }
  468. static inline void br_multicast_add_port(struct net_bridge_port *port)
  469. {
  470. }
  471. static inline void br_multicast_del_port(struct net_bridge_port *port)
  472. {
  473. }
  474. static inline void br_multicast_enable_port(struct net_bridge_port *port)
  475. {
  476. }
  477. static inline void br_multicast_disable_port(struct net_bridge_port *port)
  478. {
  479. }
  480. static inline void br_multicast_init(struct net_bridge *br)
  481. {
  482. }
  483. static inline void br_multicast_open(struct net_bridge *br)
  484. {
  485. }
  486. static inline void br_multicast_stop(struct net_bridge *br)
  487. {
  488. }
  489. static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
  490. struct sk_buff *skb)
  491. {
  492. }
  493. static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
  494. struct sk_buff *skb,
  495. struct sk_buff *skb2)
  496. {
  497. }
  498. static inline bool br_multicast_is_router(struct net_bridge *br)
  499. {
  500. return 0;
  501. }
  502. static inline bool br_multicast_querier_exists(struct net_bridge *br,
  503. struct ethhdr *eth)
  504. {
  505. return false;
  506. }
  507. static inline void br_mdb_init(void)
  508. {
  509. }
  510. static inline void br_mdb_uninit(void)
  511. {
  512. }
  513. #endif
  514. /* br_vlan.c */
  515. #ifdef CONFIG_BRIDGE_VLAN_FILTERING
  516. extern bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v,
  517. struct sk_buff *skb, u16 *vid);
  518. extern bool br_allowed_egress(struct net_bridge *br,
  519. const struct net_port_vlans *v,
  520. const struct sk_buff *skb);
  521. extern struct sk_buff *br_handle_vlan(struct net_bridge *br,
  522. const struct net_port_vlans *v,
  523. struct sk_buff *skb);
  524. extern int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags);
  525. extern int br_vlan_delete(struct net_bridge *br, u16 vid);
  526. extern void br_vlan_flush(struct net_bridge *br);
  527. extern int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
  528. extern int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags);
  529. extern int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
  530. extern void nbp_vlan_flush(struct net_bridge_port *port);
  531. extern bool nbp_vlan_find(struct net_bridge_port *port, u16 vid);
  532. static inline struct net_port_vlans *br_get_vlan_info(
  533. const struct net_bridge *br)
  534. {
  535. return rcu_dereference_rtnl(br->vlan_info);
  536. }
  537. static inline struct net_port_vlans *nbp_get_vlan_info(
  538. const struct net_bridge_port *p)
  539. {
  540. return rcu_dereference_rtnl(p->vlan_info);
  541. }
  542. /* Since bridge now depends on 8021Q module, but the time bridge sees the
  543. * skb, the vlan tag will always be present if the frame was tagged.
  544. */
  545. static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
  546. {
  547. int err = 0;
  548. if (vlan_tx_tag_present(skb))
  549. *vid = vlan_tx_tag_get(skb) & VLAN_VID_MASK;
  550. else {
  551. *vid = 0;
  552. err = -EINVAL;
  553. }
  554. return err;
  555. }
  556. static inline u16 br_get_pvid(const struct net_port_vlans *v)
  557. {
  558. /* Return just the VID if it is set, or VLAN_N_VID (invalid vid) if
  559. * vid wasn't set
  560. */
  561. smp_rmb();
  562. return (v->pvid & VLAN_TAG_PRESENT) ?
  563. (v->pvid & ~VLAN_TAG_PRESENT) :
  564. VLAN_N_VID;
  565. }
  566. #else
  567. static inline bool br_allowed_ingress(struct net_bridge *br,
  568. struct net_port_vlans *v,
  569. struct sk_buff *skb,
  570. u16 *vid)
  571. {
  572. return true;
  573. }
  574. static inline bool br_allowed_egress(struct net_bridge *br,
  575. const struct net_port_vlans *v,
  576. const struct sk_buff *skb)
  577. {
  578. return true;
  579. }
  580. static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
  581. const struct net_port_vlans *v,
  582. struct sk_buff *skb)
  583. {
  584. return skb;
  585. }
  586. static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags)
  587. {
  588. return -EOPNOTSUPP;
  589. }
  590. static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
  591. {
  592. return -EOPNOTSUPP;
  593. }
  594. static inline void br_vlan_flush(struct net_bridge *br)
  595. {
  596. }
  597. static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags)
  598. {
  599. return -EOPNOTSUPP;
  600. }
  601. static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
  602. {
  603. return -EOPNOTSUPP;
  604. }
  605. static inline void nbp_vlan_flush(struct net_bridge_port *port)
  606. {
  607. }
  608. static inline struct net_port_vlans *br_get_vlan_info(
  609. const struct net_bridge *br)
  610. {
  611. return NULL;
  612. }
  613. static inline struct net_port_vlans *nbp_get_vlan_info(
  614. const struct net_bridge_port *p)
  615. {
  616. return NULL;
  617. }
  618. static inline bool nbp_vlan_find(struct net_bridge_port *port, u16 vid)
  619. {
  620. return false;
  621. }
  622. static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
  623. {
  624. return 0;
  625. }
  626. static inline u16 br_get_pvid(const struct net_port_vlans *v)
  627. {
  628. return VLAN_N_VID; /* Returns invalid vid */
  629. }
  630. #endif
  631. /* br_netfilter.c */
  632. #ifdef CONFIG_BRIDGE_NETFILTER
  633. extern int br_netfilter_init(void);
  634. extern void br_netfilter_fini(void);
  635. extern void br_netfilter_rtable_init(struct net_bridge *);
  636. #else
  637. #define br_netfilter_init() (0)
  638. #define br_netfilter_fini() do { } while(0)
  639. #define br_netfilter_rtable_init(x)
  640. #endif
  641. /* br_stp.c */
  642. extern void br_log_state(const struct net_bridge_port *p);
  643. extern struct net_bridge_port *br_get_port(struct net_bridge *br,
  644. u16 port_no);
  645. extern void br_init_port(struct net_bridge_port *p);
  646. extern void br_become_designated_port(struct net_bridge_port *p);
  647. extern int br_set_forward_delay(struct net_bridge *br, unsigned long x);
  648. extern int br_set_hello_time(struct net_bridge *br, unsigned long x);
  649. extern int br_set_max_age(struct net_bridge *br, unsigned long x);
  650. /* br_stp_if.c */
  651. extern void br_stp_enable_bridge(struct net_bridge *br);
  652. extern void br_stp_disable_bridge(struct net_bridge *br);
  653. extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
  654. extern void br_stp_enable_port(struct net_bridge_port *p);
  655. extern void br_stp_disable_port(struct net_bridge_port *p);
  656. extern bool br_stp_recalculate_bridge_id(struct net_bridge *br);
  657. extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
  658. extern void br_stp_set_bridge_priority(struct net_bridge *br,
  659. u16 newprio);
  660. extern int br_stp_set_port_priority(struct net_bridge_port *p,
  661. unsigned long newprio);
  662. extern int br_stp_set_path_cost(struct net_bridge_port *p,
  663. unsigned long path_cost);
  664. extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
  665. /* br_stp_bpdu.c */
  666. struct stp_proto;
  667. extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
  668. struct net_device *dev);
  669. /* br_stp_timer.c */
  670. extern void br_stp_timer_init(struct net_bridge *br);
  671. extern void br_stp_port_timer_init(struct net_bridge_port *p);
  672. extern unsigned long br_timer_value(const struct timer_list *timer);
  673. /* br.c */
  674. #if IS_ENABLED(CONFIG_ATM_LANE)
  675. extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
  676. #endif
  677. /* br_netlink.c */
  678. extern struct rtnl_link_ops br_link_ops;
  679. extern int br_netlink_init(void);
  680. extern void br_netlink_fini(void);
  681. extern void br_ifinfo_notify(int event, struct net_bridge_port *port);
  682. extern int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg);
  683. extern int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg);
  684. extern int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
  685. struct net_device *dev, u32 filter_mask);
  686. #ifdef CONFIG_SYSFS
  687. /* br_sysfs_if.c */
  688. extern const struct sysfs_ops brport_sysfs_ops;
  689. extern int br_sysfs_addif(struct net_bridge_port *p);
  690. extern int br_sysfs_renameif(struct net_bridge_port *p);
  691. /* br_sysfs_br.c */
  692. extern int br_sysfs_addbr(struct net_device *dev);
  693. extern void br_sysfs_delbr(struct net_device *dev);
  694. #else
  695. static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
  696. static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
  697. static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
  698. static inline void br_sysfs_delbr(struct net_device *dev) { return; }
  699. #endif /* CONFIG_SYSFS */
  700. #endif