br_private.h 43 KB

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  1. /* SPDX-License-Identifier: GPL-2.0-or-later */
  2. /*
  3. * Linux ethernet bridge
  4. *
  5. * Authors:
  6. * Lennert Buytenhek <buytenh@gnu.org>
  7. */
  8. #ifndef _BR_PRIVATE_H
  9. #define _BR_PRIVATE_H
  10. #include <linux/netdevice.h>
  11. #include <linux/if_bridge.h>
  12. #include <linux/netpoll.h>
  13. #include <linux/u64_stats_sync.h>
  14. #include <net/route.h>
  15. #include <net/ip6_fib.h>
  16. #include <linux/if_vlan.h>
  17. #include <linux/rhashtable.h>
  18. #include <linux/refcount.h>
  19. #define BR_HASH_BITS 8
  20. #define BR_HASH_SIZE (1 << BR_HASH_BITS)
  21. #define BR_HOLD_TIME (1*HZ)
  22. #define BR_PORT_BITS 10
  23. #define BR_MAX_PORTS (1<<BR_PORT_BITS)
  24. #define BR_MULTICAST_DEFAULT_HASH_MAX 4096
  25. #define BR_VERSION "2.3"
  26. /* Control of forwarding link local multicast */
  27. #define BR_GROUPFWD_DEFAULT 0
  28. /* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */
  29. enum {
  30. BR_GROUPFWD_STP = BIT(0),
  31. BR_GROUPFWD_MACPAUSE = BIT(1),
  32. BR_GROUPFWD_LACP = BIT(2),
  33. };
  34. #define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \
  35. BR_GROUPFWD_LACP)
  36. /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
  37. #define BR_GROUPFWD_8021AD 0xB801u
  38. /* Path to usermode spanning tree program */
  39. #define BR_STP_PROG "/sbin/bridge-stp"
  40. #define BR_FDB_NOTIFY_SETTABLE_BITS (FDB_NOTIFY_BIT | FDB_NOTIFY_INACTIVE_BIT)
  41. typedef struct bridge_id bridge_id;
  42. typedef struct mac_addr mac_addr;
  43. typedef __u16 port_id;
  44. struct bridge_id {
  45. unsigned char prio[2];
  46. unsigned char addr[ETH_ALEN];
  47. };
  48. struct mac_addr {
  49. unsigned char addr[ETH_ALEN];
  50. };
  51. #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
  52. /* our own querier */
  53. struct bridge_mcast_own_query {
  54. struct timer_list timer;
  55. u32 startup_sent;
  56. };
  57. /* other querier */
  58. struct bridge_mcast_other_query {
  59. struct timer_list timer;
  60. unsigned long delay_time;
  61. };
  62. /* selected querier */
  63. struct bridge_mcast_querier {
  64. struct br_ip addr;
  65. struct net_bridge_port __rcu *port;
  66. };
  67. /* IGMP/MLD statistics */
  68. struct bridge_mcast_stats {
  69. struct br_mcast_stats mstats;
  70. struct u64_stats_sync syncp;
  71. };
  72. #endif
  73. struct br_vlan_stats {
  74. u64 rx_bytes;
  75. u64 rx_packets;
  76. u64 tx_bytes;
  77. u64 tx_packets;
  78. struct u64_stats_sync syncp;
  79. };
  80. struct br_tunnel_info {
  81. __be64 tunnel_id;
  82. struct metadata_dst __rcu *tunnel_dst;
  83. };
  84. /* private vlan flags */
  85. enum {
  86. BR_VLFLAG_PER_PORT_STATS = BIT(0),
  87. BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1),
  88. };
  89. /**
  90. * struct net_bridge_vlan - per-vlan entry
  91. *
  92. * @vnode: rhashtable member
  93. * @vid: VLAN id
  94. * @flags: bridge vlan flags
  95. * @priv_flags: private (in-kernel) bridge vlan flags
  96. * @state: STP state (e.g. blocking, learning, forwarding)
  97. * @stats: per-cpu VLAN statistics
  98. * @br: if MASTER flag set, this points to a bridge struct
  99. * @port: if MASTER flag unset, this points to a port struct
  100. * @refcnt: if MASTER flag set, this is bumped for each port referencing it
  101. * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
  102. * for this VLAN entry
  103. * @vlist: sorted list of VLAN entries
  104. * @rcu: used for entry destruction
  105. *
  106. * This structure is shared between the global per-VLAN entries contained in
  107. * the bridge rhashtable and the local per-port per-VLAN entries contained in
  108. * the port's rhashtable. The union entries should be interpreted depending on
  109. * the entry flags that are set.
  110. */
  111. struct net_bridge_vlan {
  112. struct rhash_head vnode;
  113. struct rhash_head tnode;
  114. u16 vid;
  115. u16 flags;
  116. u16 priv_flags;
  117. u8 state;
  118. struct br_vlan_stats __percpu *stats;
  119. union {
  120. struct net_bridge *br;
  121. struct net_bridge_port *port;
  122. };
  123. union {
  124. refcount_t refcnt;
  125. struct net_bridge_vlan *brvlan;
  126. };
  127. struct br_tunnel_info tinfo;
  128. struct list_head vlist;
  129. struct rcu_head rcu;
  130. };
  131. /**
  132. * struct net_bridge_vlan_group
  133. *
  134. * @vlan_hash: VLAN entry rhashtable
  135. * @vlan_list: sorted VLAN entry list
  136. * @num_vlans: number of total VLAN entries
  137. * @pvid: PVID VLAN id
  138. * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking)
  139. *
  140. * IMPORTANT: Be careful when checking if there're VLAN entries using list
  141. * primitives because the bridge can have entries in its list which
  142. * are just for global context but not for filtering, i.e. they have
  143. * the master flag set but not the brentry flag. If you have to check
  144. * if there're "real" entries in the bridge please test @num_vlans
  145. */
  146. struct net_bridge_vlan_group {
  147. struct rhashtable vlan_hash;
  148. struct rhashtable tunnel_hash;
  149. struct list_head vlan_list;
  150. u16 num_vlans;
  151. u16 pvid;
  152. u8 pvid_state;
  153. };
  154. /* bridge fdb flags */
  155. enum {
  156. BR_FDB_LOCAL,
  157. BR_FDB_STATIC,
  158. BR_FDB_STICKY,
  159. BR_FDB_ADDED_BY_USER,
  160. BR_FDB_ADDED_BY_EXT_LEARN,
  161. BR_FDB_OFFLOADED,
  162. BR_FDB_NOTIFY,
  163. BR_FDB_NOTIFY_INACTIVE
  164. };
  165. struct net_bridge_fdb_key {
  166. mac_addr addr;
  167. u16 vlan_id;
  168. };
  169. struct net_bridge_fdb_entry {
  170. struct rhash_head rhnode;
  171. struct net_bridge_port *dst;
  172. struct net_bridge_fdb_key key;
  173. struct hlist_node fdb_node;
  174. unsigned long flags;
  175. /* write-heavy members should not affect lookups */
  176. unsigned long updated ____cacheline_aligned_in_smp;
  177. unsigned long used;
  178. struct rcu_head rcu;
  179. };
  180. #define MDB_PG_FLAGS_PERMANENT BIT(0)
  181. #define MDB_PG_FLAGS_OFFLOAD BIT(1)
  182. #define MDB_PG_FLAGS_FAST_LEAVE BIT(2)
  183. #define MDB_PG_FLAGS_STAR_EXCL BIT(3)
  184. #define MDB_PG_FLAGS_BLOCKED BIT(4)
  185. #define PG_SRC_ENT_LIMIT 32
  186. #define BR_SGRP_F_DELETE BIT(0)
  187. #define BR_SGRP_F_SEND BIT(1)
  188. #define BR_SGRP_F_INSTALLED BIT(2)
  189. struct net_bridge_mcast_gc {
  190. struct hlist_node gc_node;
  191. void (*destroy)(struct net_bridge_mcast_gc *gc);
  192. };
  193. struct net_bridge_group_src {
  194. struct hlist_node node;
  195. struct br_ip addr;
  196. struct net_bridge_port_group *pg;
  197. u8 flags;
  198. u8 src_query_rexmit_cnt;
  199. struct timer_list timer;
  200. struct net_bridge *br;
  201. struct net_bridge_mcast_gc mcast_gc;
  202. struct rcu_head rcu;
  203. };
  204. struct net_bridge_port_group_sg_key {
  205. struct net_bridge_port *port;
  206. struct br_ip addr;
  207. };
  208. struct net_bridge_port_group {
  209. struct net_bridge_port_group __rcu *next;
  210. struct net_bridge_port_group_sg_key key;
  211. unsigned char eth_addr[ETH_ALEN] __aligned(2);
  212. unsigned char flags;
  213. unsigned char filter_mode;
  214. unsigned char grp_query_rexmit_cnt;
  215. unsigned char rt_protocol;
  216. struct hlist_head src_list;
  217. unsigned int src_ents;
  218. struct timer_list timer;
  219. struct timer_list rexmit_timer;
  220. struct hlist_node mglist;
  221. struct rhash_head rhnode;
  222. struct net_bridge_mcast_gc mcast_gc;
  223. struct rcu_head rcu;
  224. };
  225. struct net_bridge_mdb_entry {
  226. struct rhash_head rhnode;
  227. struct net_bridge *br;
  228. struct net_bridge_port_group __rcu *ports;
  229. struct br_ip addr;
  230. bool host_joined;
  231. struct timer_list timer;
  232. struct hlist_node mdb_node;
  233. struct net_bridge_mcast_gc mcast_gc;
  234. struct rcu_head rcu;
  235. };
  236. struct net_bridge_port {
  237. struct net_bridge *br;
  238. struct net_device *dev;
  239. struct list_head list;
  240. unsigned long flags;
  241. #ifdef CONFIG_BRIDGE_VLAN_FILTERING
  242. struct net_bridge_vlan_group __rcu *vlgrp;
  243. #endif
  244. struct net_bridge_port __rcu *backup_port;
  245. /* STP */
  246. u8 priority;
  247. u8 state;
  248. u16 port_no;
  249. unsigned char topology_change_ack;
  250. unsigned char config_pending;
  251. port_id port_id;
  252. port_id designated_port;
  253. bridge_id designated_root;
  254. bridge_id designated_bridge;
  255. u32 path_cost;
  256. u32 designated_cost;
  257. unsigned long designated_age;
  258. struct timer_list forward_delay_timer;
  259. struct timer_list hold_timer;
  260. struct timer_list message_age_timer;
  261. struct kobject kobj;
  262. struct rcu_head rcu;
  263. #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
  264. struct bridge_mcast_own_query ip4_own_query;
  265. #if IS_ENABLED(CONFIG_IPV6)
  266. struct bridge_mcast_own_query ip6_own_query;
  267. #endif /* IS_ENABLED(CONFIG_IPV6) */
  268. unsigned char multicast_router;
  269. struct bridge_mcast_stats __percpu *mcast_stats;
  270. struct timer_list multicast_router_timer;
  271. struct hlist_head mglist;
  272. struct hlist_node rlist;
  273. #endif
  274. #ifdef CONFIG_SYSFS
  275. char sysfs_name[IFNAMSIZ];
  276. #endif
  277. #ifdef CONFIG_NET_POLL_CONTROLLER
  278. struct netpoll *np;
  279. #endif
  280. #ifdef CONFIG_NET_SWITCHDEV
  281. int offload_fwd_mark;
  282. #endif
  283. u16 group_fwd_mask;
  284. u16 backup_redirected_cnt;
  285. struct bridge_stp_xstats stp_xstats;
  286. };
  287. #define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj)
  288. #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
  289. #define br_promisc_port(p) ((p)->flags & BR_PROMISC)
  290. static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
  291. {
  292. return rcu_dereference(dev->rx_handler_data);
  293. }
  294. static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
  295. {
  296. return netif_is_bridge_port(dev) ?
  297. rtnl_dereference(dev->rx_handler_data) : NULL;
  298. }
  299. static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev)
  300. {
  301. return netif_is_bridge_port(dev) ?
  302. rcu_dereference_rtnl(dev->rx_handler_data) : NULL;
  303. }
  304. enum net_bridge_opts {
  305. BROPT_VLAN_ENABLED,
  306. BROPT_VLAN_STATS_ENABLED,
  307. BROPT_NF_CALL_IPTABLES,
  308. BROPT_NF_CALL_IP6TABLES,
  309. BROPT_NF_CALL_ARPTABLES,
  310. BROPT_GROUP_ADDR_SET,
  311. BROPT_MULTICAST_ENABLED,
  312. BROPT_MULTICAST_QUERIER,
  313. BROPT_MULTICAST_QUERY_USE_IFADDR,
  314. BROPT_MULTICAST_STATS_ENABLED,
  315. BROPT_HAS_IPV6_ADDR,
  316. BROPT_NEIGH_SUPPRESS_ENABLED,
  317. BROPT_MTU_SET_BY_USER,
  318. BROPT_VLAN_STATS_PER_PORT,
  319. BROPT_NO_LL_LEARN,
  320. BROPT_VLAN_BRIDGE_BINDING,
  321. };
  322. struct net_bridge {
  323. spinlock_t lock;
  324. spinlock_t hash_lock;
  325. struct list_head port_list;
  326. struct net_device *dev;
  327. struct pcpu_sw_netstats __percpu *stats;
  328. unsigned long options;
  329. /* These fields are accessed on each packet */
  330. #ifdef CONFIG_BRIDGE_VLAN_FILTERING
  331. __be16 vlan_proto;
  332. u16 default_pvid;
  333. struct net_bridge_vlan_group __rcu *vlgrp;
  334. #endif
  335. struct rhashtable fdb_hash_tbl;
  336. #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
  337. union {
  338. struct rtable fake_rtable;
  339. struct rt6_info fake_rt6_info;
  340. };
  341. #endif
  342. u16 group_fwd_mask;
  343. u16 group_fwd_mask_required;
  344. /* STP */
  345. bridge_id designated_root;
  346. bridge_id bridge_id;
  347. unsigned char topology_change;
  348. unsigned char topology_change_detected;
  349. u16 root_port;
  350. unsigned long max_age;
  351. unsigned long hello_time;
  352. unsigned long forward_delay;
  353. unsigned long ageing_time;
  354. unsigned long bridge_max_age;
  355. unsigned long bridge_hello_time;
  356. unsigned long bridge_forward_delay;
  357. unsigned long bridge_ageing_time;
  358. u32 root_path_cost;
  359. u8 group_addr[ETH_ALEN];
  360. enum {
  361. BR_NO_STP, /* no spanning tree */
  362. BR_KERNEL_STP, /* old STP in kernel */
  363. BR_USER_STP, /* new RSTP in userspace */
  364. } stp_enabled;
  365. #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
  366. u32 hash_max;
  367. u32 multicast_last_member_count;
  368. u32 multicast_startup_query_count;
  369. u8 multicast_igmp_version;
  370. u8 multicast_router;
  371. #if IS_ENABLED(CONFIG_IPV6)
  372. u8 multicast_mld_version;
  373. #endif
  374. spinlock_t multicast_lock;
  375. unsigned long multicast_last_member_interval;
  376. unsigned long multicast_membership_interval;
  377. unsigned long multicast_querier_interval;
  378. unsigned long multicast_query_interval;
  379. unsigned long multicast_query_response_interval;
  380. unsigned long multicast_startup_query_interval;
  381. struct rhashtable mdb_hash_tbl;
  382. struct rhashtable sg_port_tbl;
  383. struct hlist_head mcast_gc_list;
  384. struct hlist_head mdb_list;
  385. struct hlist_head router_list;
  386. struct timer_list multicast_router_timer;
  387. struct bridge_mcast_other_query ip4_other_query;
  388. struct bridge_mcast_own_query ip4_own_query;
  389. struct bridge_mcast_querier ip4_querier;
  390. struct bridge_mcast_stats __percpu *mcast_stats;
  391. #if IS_ENABLED(CONFIG_IPV6)
  392. struct bridge_mcast_other_query ip6_other_query;
  393. struct bridge_mcast_own_query ip6_own_query;
  394. struct bridge_mcast_querier ip6_querier;
  395. #endif /* IS_ENABLED(CONFIG_IPV6) */
  396. struct work_struct mcast_gc_work;
  397. #endif
  398. struct timer_list hello_timer;
  399. struct timer_list tcn_timer;
  400. struct timer_list topology_change_timer;
  401. struct delayed_work gc_work;
  402. struct kobject *ifobj;
  403. u32 auto_cnt;
  404. #ifdef CONFIG_NET_SWITCHDEV
  405. int offload_fwd_mark;
  406. #endif
  407. struct hlist_head fdb_list;
  408. #if IS_ENABLED(CONFIG_BRIDGE_MRP)
  409. struct list_head mrp_list;
  410. #endif
  411. };
  412. struct br_input_skb_cb {
  413. struct net_device *brdev;
  414. u16 frag_max_size;
  415. #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
  416. u8 igmp;
  417. u8 mrouters_only:1;
  418. #endif
  419. u8 proxyarp_replied:1;
  420. u8 src_port_isolated:1;
  421. #ifdef CONFIG_BRIDGE_VLAN_FILTERING
  422. u8 vlan_filtered:1;
  423. #endif
  424. #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
  425. u8 br_netfilter_broute:1;
  426. #endif
  427. #ifdef CONFIG_NET_SWITCHDEV
  428. int offload_fwd_mark;
  429. #endif
  430. };
  431. #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
  432. #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
  433. # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
  434. #else
  435. # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
  436. #endif
  437. #define br_printk(level, br, format, args...) \
  438. printk(level "%s: " format, (br)->dev->name, ##args)
  439. #define br_err(__br, format, args...) \
  440. br_printk(KERN_ERR, __br, format, ##args)
  441. #define br_warn(__br, format, args...) \
  442. br_printk(KERN_WARNING, __br, format, ##args)
  443. #define br_notice(__br, format, args...) \
  444. br_printk(KERN_NOTICE, __br, format, ##args)
  445. #define br_info(__br, format, args...) \
  446. br_printk(KERN_INFO, __br, format, ##args)
  447. #define br_debug(br, format, args...) \
  448. pr_debug("%s: " format, (br)->dev->name, ##args)
  449. /* called under bridge lock */
  450. static inline int br_is_root_bridge(const struct net_bridge *br)
  451. {
  452. return !memcmp(&br->bridge_id, &br->designated_root, 8);
  453. }
  454. /* check if a VLAN entry is global */
  455. static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
  456. {
  457. return v->flags & BRIDGE_VLAN_INFO_MASTER;
  458. }
  459. /* check if a VLAN entry is used by the bridge */
  460. static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
  461. {
  462. return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
  463. }
  464. /* check if we should use the vlan entry, returns false if it's only context */
  465. static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
  466. {
  467. if (br_vlan_is_master(v)) {
  468. if (br_vlan_is_brentry(v))
  469. return true;
  470. else
  471. return false;
  472. }
  473. return true;
  474. }
  475. static inline bool nbp_state_should_learn(const struct net_bridge_port *p)
  476. {
  477. return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING;
  478. }
  479. static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack)
  480. {
  481. bool ret = vid > 0 && vid < VLAN_VID_MASK;
  482. if (!ret)
  483. NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid");
  484. return ret;
  485. }
  486. static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur,
  487. const struct bridge_vlan_info *last,
  488. struct netlink_ext_ack *extack)
  489. {
  490. /* pvid flag is not allowed in ranges */
  491. if (cur->flags & BRIDGE_VLAN_INFO_PVID) {
  492. NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range");
  493. return false;
  494. }
  495. /* when cur is the range end, check if:
  496. * - it has range start flag
  497. * - range ids are invalid (end is equal to or before start)
  498. */
  499. if (last) {
  500. if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
  501. NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one");
  502. return false;
  503. } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) {
  504. NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing");
  505. return false;
  506. } else if (cur->vid <= last->vid) {
  507. NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id");
  508. return false;
  509. }
  510. }
  511. /* check for required range flags */
  512. if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN |
  513. BRIDGE_VLAN_INFO_RANGE_END))) {
  514. NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing");
  515. return false;
  516. }
  517. return true;
  518. }
  519. static inline int br_afspec_cmd_to_rtm(int cmd)
  520. {
  521. switch (cmd) {
  522. case RTM_SETLINK:
  523. return RTM_NEWVLAN;
  524. case RTM_DELLINK:
  525. return RTM_DELVLAN;
  526. }
  527. return 0;
  528. }
  529. static inline int br_opt_get(const struct net_bridge *br,
  530. enum net_bridge_opts opt)
  531. {
  532. return test_bit(opt, &br->options);
  533. }
  534. int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
  535. struct netlink_ext_ack *extack);
  536. int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt);
  537. int br_boolopt_multi_toggle(struct net_bridge *br,
  538. struct br_boolopt_multi *bm,
  539. struct netlink_ext_ack *extack);
  540. void br_boolopt_multi_get(const struct net_bridge *br,
  541. struct br_boolopt_multi *bm);
  542. void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on);
  543. /* br_device.c */
  544. void br_dev_setup(struct net_device *dev);
  545. void br_dev_delete(struct net_device *dev, struct list_head *list);
  546. netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
  547. #ifdef CONFIG_NET_POLL_CONTROLLER
  548. static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
  549. struct sk_buff *skb)
  550. {
  551. netpoll_send_skb(p->np, skb);
  552. }
  553. int br_netpoll_enable(struct net_bridge_port *p);
  554. void br_netpoll_disable(struct net_bridge_port *p);
  555. #else
  556. static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
  557. struct sk_buff *skb)
  558. {
  559. }
  560. static inline int br_netpoll_enable(struct net_bridge_port *p)
  561. {
  562. return 0;
  563. }
  564. static inline void br_netpoll_disable(struct net_bridge_port *p)
  565. {
  566. }
  567. #endif
  568. /* br_fdb.c */
  569. int br_fdb_init(void);
  570. void br_fdb_fini(void);
  571. int br_fdb_hash_init(struct net_bridge *br);
  572. void br_fdb_hash_fini(struct net_bridge *br);
  573. void br_fdb_flush(struct net_bridge *br);
  574. void br_fdb_find_delete_local(struct net_bridge *br,
  575. const struct net_bridge_port *p,
  576. const unsigned char *addr, u16 vid);
  577. void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
  578. void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
  579. void br_fdb_cleanup(struct work_struct *work);
  580. void br_fdb_delete_by_port(struct net_bridge *br,
  581. const struct net_bridge_port *p, u16 vid, int do_all);
  582. struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br,
  583. const unsigned char *addr,
  584. __u16 vid);
  585. int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
  586. int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
  587. unsigned long off);
  588. int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
  589. const unsigned char *addr, u16 vid);
  590. void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
  591. const unsigned char *addr, u16 vid, unsigned long flags);
  592. int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
  593. struct net_device *dev, const unsigned char *addr, u16 vid);
  594. int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
  595. const unsigned char *addr, u16 vid, u16 nlh_flags,
  596. struct netlink_ext_ack *extack);
  597. int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
  598. struct net_device *dev, struct net_device *fdev, int *idx);
  599. int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev,
  600. const unsigned char *addr, u16 vid, u32 portid, u32 seq,
  601. struct netlink_ext_ack *extack);
  602. int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
  603. void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
  604. int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
  605. const unsigned char *addr, u16 vid,
  606. bool swdev_notify);
  607. int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
  608. const unsigned char *addr, u16 vid,
  609. bool swdev_notify);
  610. void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p,
  611. const unsigned char *addr, u16 vid, bool offloaded);
  612. /* br_forward.c */
  613. enum br_pkt_type {
  614. BR_PKT_UNICAST,
  615. BR_PKT_MULTICAST,
  616. BR_PKT_BROADCAST
  617. };
  618. int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
  619. void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
  620. bool local_rcv, bool local_orig);
  621. int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
  622. void br_flood(struct net_bridge *br, struct sk_buff *skb,
  623. enum br_pkt_type pkt_type, bool local_rcv, bool local_orig);
  624. /* return true if both source port and dest port are isolated */
  625. static inline bool br_skb_isolated(const struct net_bridge_port *to,
  626. const struct sk_buff *skb)
  627. {
  628. return BR_INPUT_SKB_CB(skb)->src_port_isolated &&
  629. (to->flags & BR_ISOLATED);
  630. }
  631. /* br_if.c */
  632. void br_port_carrier_check(struct net_bridge_port *p, bool *notified);
  633. int br_add_bridge(struct net *net, const char *name);
  634. int br_del_bridge(struct net *net, const char *name);
  635. int br_add_if(struct net_bridge *br, struct net_device *dev,
  636. struct netlink_ext_ack *extack);
  637. int br_del_if(struct net_bridge *br, struct net_device *dev);
  638. void br_mtu_auto_adjust(struct net_bridge *br);
  639. netdev_features_t br_features_recompute(struct net_bridge *br,
  640. netdev_features_t features);
  641. void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
  642. void br_manage_promisc(struct net_bridge *br);
  643. int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev);
  644. /* br_input.c */
  645. int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
  646. rx_handler_func_t *br_get_rx_handler(const struct net_device *dev);
  647. static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
  648. {
  649. return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev);
  650. }
  651. static inline bool br_rx_handler_check_rtnl(const struct net_device *dev)
  652. {
  653. return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev);
  654. }
  655. static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
  656. {
  657. return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
  658. }
  659. static inline struct net_bridge_port *
  660. br_port_get_check_rtnl(const struct net_device *dev)
  661. {
  662. return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL;
  663. }
  664. /* br_ioctl.c */
  665. int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
  666. int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
  667. void __user *arg);
  668. /* br_multicast.c */
  669. #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
  670. int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
  671. struct sk_buff *skb, u16 vid);
  672. struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
  673. struct sk_buff *skb, u16 vid);
  674. int br_multicast_add_port(struct net_bridge_port *port);
  675. void br_multicast_del_port(struct net_bridge_port *port);
  676. void br_multicast_enable_port(struct net_bridge_port *port);
  677. void br_multicast_disable_port(struct net_bridge_port *port);
  678. void br_multicast_init(struct net_bridge *br);
  679. void br_multicast_join_snoopers(struct net_bridge *br);
  680. void br_multicast_leave_snoopers(struct net_bridge *br);
  681. void br_multicast_open(struct net_bridge *br);
  682. void br_multicast_stop(struct net_bridge *br);
  683. void br_multicast_dev_del(struct net_bridge *br);
  684. void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
  685. struct sk_buff *skb, bool local_rcv, bool local_orig);
  686. int br_multicast_set_router(struct net_bridge *br, unsigned long val);
  687. int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
  688. int br_multicast_toggle(struct net_bridge *br, unsigned long val);
  689. int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
  690. int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
  691. int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val);
  692. #if IS_ENABLED(CONFIG_IPV6)
  693. int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val);
  694. #endif
  695. struct net_bridge_mdb_entry *
  696. br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst);
  697. struct net_bridge_mdb_entry *
  698. br_multicast_new_group(struct net_bridge *br, struct br_ip *group);
  699. struct net_bridge_port_group *
  700. br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
  701. struct net_bridge_port_group __rcu *next,
  702. unsigned char flags, const unsigned char *src,
  703. u8 filter_mode, u8 rt_protocol);
  704. int br_mdb_hash_init(struct net_bridge *br);
  705. void br_mdb_hash_fini(struct net_bridge *br);
  706. void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp,
  707. struct net_bridge_port_group *pg, int type);
  708. void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
  709. int type);
  710. void br_multicast_del_pg(struct net_bridge_mdb_entry *mp,
  711. struct net_bridge_port_group *pg,
  712. struct net_bridge_port_group __rcu **pp);
  713. void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p,
  714. const struct sk_buff *skb, u8 type, u8 dir);
  715. int br_multicast_init_stats(struct net_bridge *br);
  716. void br_multicast_uninit_stats(struct net_bridge *br);
  717. void br_multicast_get_stats(const struct net_bridge *br,
  718. const struct net_bridge_port *p,
  719. struct br_mcast_stats *dest);
  720. void br_mdb_init(void);
  721. void br_mdb_uninit(void);
  722. void br_multicast_host_join(struct net_bridge_mdb_entry *mp, bool notify);
  723. void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify);
  724. void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg,
  725. u8 filter_mode);
  726. void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp,
  727. struct net_bridge_port_group *sg);
  728. #define mlock_dereference(X, br) \
  729. rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
  730. static inline bool br_multicast_is_router(struct net_bridge *br)
  731. {
  732. return br->multicast_router == 2 ||
  733. (br->multicast_router == 1 &&
  734. timer_pending(&br->multicast_router_timer));
  735. }
  736. static inline bool
  737. __br_multicast_querier_exists(struct net_bridge *br,
  738. struct bridge_mcast_other_query *querier,
  739. const bool is_ipv6)
  740. {
  741. bool own_querier_enabled;
  742. if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) {
  743. if (is_ipv6 && !br_opt_get(br, BROPT_HAS_IPV6_ADDR))
  744. own_querier_enabled = false;
  745. else
  746. own_querier_enabled = true;
  747. } else {
  748. own_querier_enabled = false;
  749. }
  750. return time_is_before_jiffies(querier->delay_time) &&
  751. (own_querier_enabled || timer_pending(&querier->timer));
  752. }
  753. static inline bool br_multicast_querier_exists(struct net_bridge *br,
  754. struct ethhdr *eth)
  755. {
  756. switch (eth->h_proto) {
  757. case (htons(ETH_P_IP)):
  758. return __br_multicast_querier_exists(br,
  759. &br->ip4_other_query, false);
  760. #if IS_ENABLED(CONFIG_IPV6)
  761. case (htons(ETH_P_IPV6)):
  762. return __br_multicast_querier_exists(br,
  763. &br->ip6_other_query, true);
  764. #endif
  765. default:
  766. return false;
  767. }
  768. }
  769. static inline bool br_multicast_is_star_g(const struct br_ip *ip)
  770. {
  771. switch (ip->proto) {
  772. case htons(ETH_P_IP):
  773. return ipv4_is_zeronet(ip->src.ip4);
  774. #if IS_ENABLED(CONFIG_IPV6)
  775. case htons(ETH_P_IPV6):
  776. return ipv6_addr_any(&ip->src.ip6);
  777. #endif
  778. default:
  779. return false;
  780. }
  781. }
  782. static inline bool br_multicast_should_handle_mode(const struct net_bridge *br,
  783. __be16 proto)
  784. {
  785. switch (proto) {
  786. case htons(ETH_P_IP):
  787. return !!(br->multicast_igmp_version == 3);
  788. #if IS_ENABLED(CONFIG_IPV6)
  789. case htons(ETH_P_IPV6):
  790. return !!(br->multicast_mld_version == 2);
  791. #endif
  792. default:
  793. return false;
  794. }
  795. }
  796. static inline int br_multicast_igmp_type(const struct sk_buff *skb)
  797. {
  798. return BR_INPUT_SKB_CB(skb)->igmp;
  799. }
  800. static inline unsigned long br_multicast_lmqt(const struct net_bridge *br)
  801. {
  802. return br->multicast_last_member_interval *
  803. br->multicast_last_member_count;
  804. }
  805. static inline unsigned long br_multicast_gmi(const struct net_bridge *br)
  806. {
  807. return br->multicast_membership_interval;
  808. }
  809. #else
  810. static inline int br_multicast_rcv(struct net_bridge *br,
  811. struct net_bridge_port *port,
  812. struct sk_buff *skb,
  813. u16 vid)
  814. {
  815. return 0;
  816. }
  817. static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
  818. struct sk_buff *skb, u16 vid)
  819. {
  820. return NULL;
  821. }
  822. static inline int br_multicast_add_port(struct net_bridge_port *port)
  823. {
  824. return 0;
  825. }
  826. static inline void br_multicast_del_port(struct net_bridge_port *port)
  827. {
  828. }
  829. static inline void br_multicast_enable_port(struct net_bridge_port *port)
  830. {
  831. }
  832. static inline void br_multicast_disable_port(struct net_bridge_port *port)
  833. {
  834. }
  835. static inline void br_multicast_init(struct net_bridge *br)
  836. {
  837. }
  838. static inline void br_multicast_join_snoopers(struct net_bridge *br)
  839. {
  840. }
  841. static inline void br_multicast_leave_snoopers(struct net_bridge *br)
  842. {
  843. }
  844. static inline void br_multicast_open(struct net_bridge *br)
  845. {
  846. }
  847. static inline void br_multicast_stop(struct net_bridge *br)
  848. {
  849. }
  850. static inline void br_multicast_dev_del(struct net_bridge *br)
  851. {
  852. }
  853. static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
  854. struct sk_buff *skb,
  855. bool local_rcv, bool local_orig)
  856. {
  857. }
  858. static inline bool br_multicast_is_router(struct net_bridge *br)
  859. {
  860. return false;
  861. }
  862. static inline bool br_multicast_querier_exists(struct net_bridge *br,
  863. struct ethhdr *eth)
  864. {
  865. return false;
  866. }
  867. static inline void br_mdb_init(void)
  868. {
  869. }
  870. static inline void br_mdb_uninit(void)
  871. {
  872. }
  873. static inline int br_mdb_hash_init(struct net_bridge *br)
  874. {
  875. return 0;
  876. }
  877. static inline void br_mdb_hash_fini(struct net_bridge *br)
  878. {
  879. }
  880. static inline void br_multicast_count(struct net_bridge *br,
  881. const struct net_bridge_port *p,
  882. const struct sk_buff *skb,
  883. u8 type, u8 dir)
  884. {
  885. }
  886. static inline int br_multicast_init_stats(struct net_bridge *br)
  887. {
  888. return 0;
  889. }
  890. static inline void br_multicast_uninit_stats(struct net_bridge *br)
  891. {
  892. }
  893. static inline int br_multicast_igmp_type(const struct sk_buff *skb)
  894. {
  895. return 0;
  896. }
  897. #endif
  898. /* br_vlan.c */
  899. #ifdef CONFIG_BRIDGE_VLAN_FILTERING
  900. bool br_allowed_ingress(const struct net_bridge *br,
  901. struct net_bridge_vlan_group *vg, struct sk_buff *skb,
  902. u16 *vid, u8 *state);
  903. bool br_allowed_egress(struct net_bridge_vlan_group *vg,
  904. const struct sk_buff *skb);
  905. bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
  906. struct sk_buff *br_handle_vlan(struct net_bridge *br,
  907. const struct net_bridge_port *port,
  908. struct net_bridge_vlan_group *vg,
  909. struct sk_buff *skb);
  910. int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
  911. bool *changed, struct netlink_ext_ack *extack);
  912. int br_vlan_delete(struct net_bridge *br, u16 vid);
  913. void br_vlan_flush(struct net_bridge *br);
  914. struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
  915. void br_recalculate_fwd_mask(struct net_bridge *br);
  916. int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
  917. int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
  918. int __br_vlan_set_proto(struct net_bridge *br, __be16 proto);
  919. int br_vlan_set_proto(struct net_bridge *br, unsigned long val);
  920. int br_vlan_set_stats(struct net_bridge *br, unsigned long val);
  921. int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val);
  922. int br_vlan_init(struct net_bridge *br);
  923. int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val);
  924. int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid,
  925. struct netlink_ext_ack *extack);
  926. int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
  927. bool *changed, struct netlink_ext_ack *extack);
  928. int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
  929. void nbp_vlan_flush(struct net_bridge_port *port);
  930. int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack);
  931. int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
  932. void br_vlan_get_stats(const struct net_bridge_vlan *v,
  933. struct br_vlan_stats *stats);
  934. void br_vlan_port_event(struct net_bridge_port *p, unsigned long event);
  935. int br_vlan_bridge_event(struct net_device *dev, unsigned long event,
  936. void *ptr);
  937. void br_vlan_rtnl_init(void);
  938. void br_vlan_rtnl_uninit(void);
  939. void br_vlan_notify(const struct net_bridge *br,
  940. const struct net_bridge_port *p,
  941. u16 vid, u16 vid_range,
  942. int cmd);
  943. bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
  944. const struct net_bridge_vlan *range_end);
  945. static inline struct net_bridge_vlan_group *br_vlan_group(
  946. const struct net_bridge *br)
  947. {
  948. return rtnl_dereference(br->vlgrp);
  949. }
  950. static inline struct net_bridge_vlan_group *nbp_vlan_group(
  951. const struct net_bridge_port *p)
  952. {
  953. return rtnl_dereference(p->vlgrp);
  954. }
  955. static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
  956. const struct net_bridge *br)
  957. {
  958. return rcu_dereference(br->vlgrp);
  959. }
  960. static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
  961. const struct net_bridge_port *p)
  962. {
  963. return rcu_dereference(p->vlgrp);
  964. }
  965. /* Since bridge now depends on 8021Q module, but the time bridge sees the
  966. * skb, the vlan tag will always be present if the frame was tagged.
  967. */
  968. static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
  969. {
  970. int err = 0;
  971. if (skb_vlan_tag_present(skb)) {
  972. *vid = skb_vlan_tag_get_id(skb);
  973. } else {
  974. *vid = 0;
  975. err = -EINVAL;
  976. }
  977. return err;
  978. }
  979. static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
  980. {
  981. if (!vg)
  982. return 0;
  983. smp_rmb();
  984. return vg->pvid;
  985. }
  986. static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid)
  987. {
  988. return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags;
  989. }
  990. #else
  991. static inline bool br_allowed_ingress(const struct net_bridge *br,
  992. struct net_bridge_vlan_group *vg,
  993. struct sk_buff *skb,
  994. u16 *vid, u8 *state)
  995. {
  996. return true;
  997. }
  998. static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
  999. const struct sk_buff *skb)
  1000. {
  1001. return true;
  1002. }
  1003. static inline bool br_should_learn(struct net_bridge_port *p,
  1004. struct sk_buff *skb, u16 *vid)
  1005. {
  1006. return true;
  1007. }
  1008. static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
  1009. const struct net_bridge_port *port,
  1010. struct net_bridge_vlan_group *vg,
  1011. struct sk_buff *skb)
  1012. {
  1013. return skb;
  1014. }
  1015. static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
  1016. bool *changed, struct netlink_ext_ack *extack)
  1017. {
  1018. *changed = false;
  1019. return -EOPNOTSUPP;
  1020. }
  1021. static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
  1022. {
  1023. return -EOPNOTSUPP;
  1024. }
  1025. static inline void br_vlan_flush(struct net_bridge *br)
  1026. {
  1027. }
  1028. static inline void br_recalculate_fwd_mask(struct net_bridge *br)
  1029. {
  1030. }
  1031. static inline int br_vlan_init(struct net_bridge *br)
  1032. {
  1033. return 0;
  1034. }
  1035. static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
  1036. bool *changed, struct netlink_ext_ack *extack)
  1037. {
  1038. *changed = false;
  1039. return -EOPNOTSUPP;
  1040. }
  1041. static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
  1042. {
  1043. return -EOPNOTSUPP;
  1044. }
  1045. static inline void nbp_vlan_flush(struct net_bridge_port *port)
  1046. {
  1047. }
  1048. static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
  1049. u16 vid)
  1050. {
  1051. return NULL;
  1052. }
  1053. static inline int nbp_vlan_init(struct net_bridge_port *port,
  1054. struct netlink_ext_ack *extack)
  1055. {
  1056. return 0;
  1057. }
  1058. static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
  1059. {
  1060. return 0;
  1061. }
  1062. static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
  1063. {
  1064. return 0;
  1065. }
  1066. static inline int __br_vlan_filter_toggle(struct net_bridge *br,
  1067. unsigned long val)
  1068. {
  1069. return -EOPNOTSUPP;
  1070. }
  1071. static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
  1072. u32 filter_mask)
  1073. {
  1074. return 0;
  1075. }
  1076. static inline struct net_bridge_vlan_group *br_vlan_group(
  1077. const struct net_bridge *br)
  1078. {
  1079. return NULL;
  1080. }
  1081. static inline struct net_bridge_vlan_group *nbp_vlan_group(
  1082. const struct net_bridge_port *p)
  1083. {
  1084. return NULL;
  1085. }
  1086. static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
  1087. const struct net_bridge *br)
  1088. {
  1089. return NULL;
  1090. }
  1091. static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
  1092. const struct net_bridge_port *p)
  1093. {
  1094. return NULL;
  1095. }
  1096. static inline void br_vlan_get_stats(const struct net_bridge_vlan *v,
  1097. struct br_vlan_stats *stats)
  1098. {
  1099. }
  1100. static inline void br_vlan_port_event(struct net_bridge_port *p,
  1101. unsigned long event)
  1102. {
  1103. }
  1104. static inline int br_vlan_bridge_event(struct net_device *dev,
  1105. unsigned long event, void *ptr)
  1106. {
  1107. return 0;
  1108. }
  1109. static inline void br_vlan_rtnl_init(void)
  1110. {
  1111. }
  1112. static inline void br_vlan_rtnl_uninit(void)
  1113. {
  1114. }
  1115. static inline void br_vlan_notify(const struct net_bridge *br,
  1116. const struct net_bridge_port *p,
  1117. u16 vid, u16 vid_range,
  1118. int cmd)
  1119. {
  1120. }
  1121. static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
  1122. const struct net_bridge_vlan *range_end)
  1123. {
  1124. return true;
  1125. }
  1126. #endif
  1127. /* br_vlan_options.c */
  1128. #ifdef CONFIG_BRIDGE_VLAN_FILTERING
  1129. bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr,
  1130. const struct net_bridge_vlan *range_end);
  1131. bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v);
  1132. size_t br_vlan_opts_nl_size(void);
  1133. int br_vlan_process_options(const struct net_bridge *br,
  1134. const struct net_bridge_port *p,
  1135. struct net_bridge_vlan *range_start,
  1136. struct net_bridge_vlan *range_end,
  1137. struct nlattr **tb,
  1138. struct netlink_ext_ack *extack);
  1139. /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */
  1140. static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v)
  1141. {
  1142. return READ_ONCE(v->state);
  1143. }
  1144. static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state)
  1145. {
  1146. WRITE_ONCE(v->state, state);
  1147. }
  1148. static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg)
  1149. {
  1150. return READ_ONCE(vg->pvid_state);
  1151. }
  1152. static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg,
  1153. u8 state)
  1154. {
  1155. WRITE_ONCE(vg->pvid_state, state);
  1156. }
  1157. /* learn_allow is true at ingress and false at egress */
  1158. static inline bool br_vlan_state_allowed(u8 state, bool learn_allow)
  1159. {
  1160. switch (state) {
  1161. case BR_STATE_LEARNING:
  1162. return learn_allow;
  1163. case BR_STATE_FORWARDING:
  1164. return true;
  1165. default:
  1166. return false;
  1167. }
  1168. }
  1169. #endif
  1170. struct nf_br_ops {
  1171. int (*br_dev_xmit_hook)(struct sk_buff *skb);
  1172. };
  1173. extern const struct nf_br_ops __rcu *nf_br_ops;
  1174. /* br_netfilter.c */
  1175. #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
  1176. int br_nf_core_init(void);
  1177. void br_nf_core_fini(void);
  1178. void br_netfilter_rtable_init(struct net_bridge *);
  1179. #else
  1180. static inline int br_nf_core_init(void) { return 0; }
  1181. static inline void br_nf_core_fini(void) {}
  1182. #define br_netfilter_rtable_init(x)
  1183. #endif
  1184. /* br_stp.c */
  1185. void br_set_state(struct net_bridge_port *p, unsigned int state);
  1186. struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
  1187. void br_init_port(struct net_bridge_port *p);
  1188. void br_become_designated_port(struct net_bridge_port *p);
  1189. void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
  1190. int br_set_forward_delay(struct net_bridge *br, unsigned long x);
  1191. int br_set_hello_time(struct net_bridge *br, unsigned long x);
  1192. int br_set_max_age(struct net_bridge *br, unsigned long x);
  1193. int __set_ageing_time(struct net_device *dev, unsigned long t);
  1194. int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time);
  1195. /* br_stp_if.c */
  1196. void br_stp_enable_bridge(struct net_bridge *br);
  1197. void br_stp_disable_bridge(struct net_bridge *br);
  1198. int br_stp_set_enabled(struct net_bridge *br, unsigned long val,
  1199. struct netlink_ext_ack *extack);
  1200. void br_stp_enable_port(struct net_bridge_port *p);
  1201. void br_stp_disable_port(struct net_bridge_port *p);
  1202. bool br_stp_recalculate_bridge_id(struct net_bridge *br);
  1203. void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
  1204. void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
  1205. int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
  1206. int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
  1207. ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
  1208. /* br_stp_bpdu.c */
  1209. struct stp_proto;
  1210. void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
  1211. struct net_device *dev);
  1212. /* br_stp_timer.c */
  1213. void br_stp_timer_init(struct net_bridge *br);
  1214. void br_stp_port_timer_init(struct net_bridge_port *p);
  1215. unsigned long br_timer_value(const struct timer_list *timer);
  1216. /* br.c */
  1217. #if IS_ENABLED(CONFIG_ATM_LANE)
  1218. extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
  1219. #endif
  1220. /* br_mrp.c */
  1221. #if IS_ENABLED(CONFIG_BRIDGE_MRP)
  1222. int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
  1223. struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
  1224. int br_mrp_process(struct net_bridge_port *p, struct sk_buff *skb);
  1225. bool br_mrp_enabled(struct net_bridge *br);
  1226. void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p);
  1227. int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br);
  1228. #else
  1229. static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
  1230. struct nlattr *attr, int cmd,
  1231. struct netlink_ext_ack *extack)
  1232. {
  1233. return -EOPNOTSUPP;
  1234. }
  1235. static inline int br_mrp_process(struct net_bridge_port *p, struct sk_buff *skb)
  1236. {
  1237. return 0;
  1238. }
  1239. static inline bool br_mrp_enabled(struct net_bridge *br)
  1240. {
  1241. return false;
  1242. }
  1243. static inline void br_mrp_port_del(struct net_bridge *br,
  1244. struct net_bridge_port *p)
  1245. {
  1246. }
  1247. static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br)
  1248. {
  1249. return 0;
  1250. }
  1251. #endif
  1252. /* br_netlink.c */
  1253. extern struct rtnl_link_ops br_link_ops;
  1254. int br_netlink_init(void);
  1255. void br_netlink_fini(void);
  1256. void br_ifinfo_notify(int event, const struct net_bridge *br,
  1257. const struct net_bridge_port *port);
  1258. int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags,
  1259. struct netlink_ext_ack *extack);
  1260. int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
  1261. int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
  1262. u32 filter_mask, int nlflags);
  1263. int br_process_vlan_info(struct net_bridge *br,
  1264. struct net_bridge_port *p, int cmd,
  1265. struct bridge_vlan_info *vinfo_curr,
  1266. struct bridge_vlan_info **vinfo_last,
  1267. bool *changed,
  1268. struct netlink_ext_ack *extack);
  1269. #ifdef CONFIG_SYSFS
  1270. /* br_sysfs_if.c */
  1271. extern const struct sysfs_ops brport_sysfs_ops;
  1272. int br_sysfs_addif(struct net_bridge_port *p);
  1273. int br_sysfs_renameif(struct net_bridge_port *p);
  1274. /* br_sysfs_br.c */
  1275. int br_sysfs_addbr(struct net_device *dev);
  1276. void br_sysfs_delbr(struct net_device *dev);
  1277. #else
  1278. static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
  1279. static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
  1280. static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
  1281. static inline void br_sysfs_delbr(struct net_device *dev) { return; }
  1282. #endif /* CONFIG_SYSFS */
  1283. /* br_switchdev.c */
  1284. #ifdef CONFIG_NET_SWITCHDEV
  1285. int nbp_switchdev_mark_set(struct net_bridge_port *p);
  1286. void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
  1287. struct sk_buff *skb);
  1288. bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
  1289. const struct sk_buff *skb);
  1290. int br_switchdev_set_port_flag(struct net_bridge_port *p,
  1291. unsigned long flags,
  1292. unsigned long mask);
  1293. void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb,
  1294. int type);
  1295. int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags,
  1296. struct netlink_ext_ack *extack);
  1297. int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid);
  1298. static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
  1299. {
  1300. skb->offload_fwd_mark = 0;
  1301. }
  1302. #else
  1303. static inline int nbp_switchdev_mark_set(struct net_bridge_port *p)
  1304. {
  1305. return 0;
  1306. }
  1307. static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
  1308. struct sk_buff *skb)
  1309. {
  1310. }
  1311. static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
  1312. const struct sk_buff *skb)
  1313. {
  1314. return true;
  1315. }
  1316. static inline int br_switchdev_set_port_flag(struct net_bridge_port *p,
  1317. unsigned long flags,
  1318. unsigned long mask)
  1319. {
  1320. return 0;
  1321. }
  1322. static inline int br_switchdev_port_vlan_add(struct net_device *dev,
  1323. u16 vid, u16 flags,
  1324. struct netlink_ext_ack *extack)
  1325. {
  1326. return -EOPNOTSUPP;
  1327. }
  1328. static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid)
  1329. {
  1330. return -EOPNOTSUPP;
  1331. }
  1332. static inline void
  1333. br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type)
  1334. {
  1335. }
  1336. static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
  1337. {
  1338. }
  1339. #endif /* CONFIG_NET_SWITCHDEV */
  1340. /* br_arp_nd_proxy.c */
  1341. void br_recalculate_neigh_suppress_enabled(struct net_bridge *br);
  1342. void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br,
  1343. u16 vid, struct net_bridge_port *p);
  1344. void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br,
  1345. u16 vid, struct net_bridge_port *p, struct nd_msg *msg);
  1346. struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m);
  1347. #endif