| 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 | |
| 13 | #ifndef _BR_PRIVATE_H |
| 14 | #define _BR_PRIVATE_H |
| 15 | |
| 16 | #include <linux/netdevice.h> |
| 17 | #include <linux/if_bridge.h> |
| 18 | #include <linux/netpoll.h> |
| 19 | #include <linux/u64_stats_sync.h> |
| 20 | #include <net/route.h> |
| 21 | #include <net/ip6_fib.h> |
| 22 | #include <linux/if_vlan.h> |
| 23 | #include <linux/rhashtable.h> |
| 24 | |
| 25 | #define BR_HASH_BITS 8 |
| 26 | #define BR_HASH_SIZE (1 << BR_HASH_BITS) |
| 27 | |
| 28 | #define BR_HOLD_TIME (1*HZ) |
| 29 | |
| 30 | #define BR_PORT_BITS 10 |
| 31 | #define BR_MAX_PORTS (1<<BR_PORT_BITS) |
| 32 | |
| 33 | #define BR_VERSION "2.3" |
| 34 | |
| 35 | /* Control of forwarding link local multicast */ |
| 36 | #define BR_GROUPFWD_DEFAULT 0 |
| 37 | /* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */ |
| 38 | #define BR_GROUPFWD_RESTRICTED 0x0007u |
| 39 | /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */ |
| 40 | #define BR_GROUPFWD_8021AD 0xB801u |
| 41 | |
| 42 | /* Path to usermode spanning tree program */ |
| 43 | #define BR_STP_PROG "/sbin/bridge-stp" |
| 44 | |
| 45 | typedef struct bridge_id bridge_id; |
| 46 | typedef struct mac_addr mac_addr; |
| 47 | typedef __u16 port_id; |
| 48 | |
| 49 | struct bridge_id |
| 50 | { |
| 51 | unsigned char prio[2]; |
| 52 | unsigned char addr[ETH_ALEN]; |
| 53 | }; |
| 54 | |
| 55 | struct mac_addr |
| 56 | { |
| 57 | unsigned char addr[ETH_ALEN]; |
| 58 | }; |
| 59 | |
| 60 | #ifdef CONFIG_BRIDGE_IGMP_SNOOPING |
| 61 | /* our own querier */ |
| 62 | struct bridge_mcast_own_query { |
| 63 | struct timer_list timer; |
| 64 | u32 startup_sent; |
| 65 | }; |
| 66 | |
| 67 | /* other querier */ |
| 68 | struct bridge_mcast_other_query { |
| 69 | struct timer_list timer; |
| 70 | unsigned long delay_time; |
| 71 | }; |
| 72 | |
| 73 | /* selected querier */ |
| 74 | struct bridge_mcast_querier { |
| 75 | struct br_ip addr; |
| 76 | struct net_bridge_port __rcu *port; |
| 77 | }; |
| 78 | #endif |
| 79 | |
| 80 | struct br_vlan_stats { |
| 81 | u64 rx_bytes; |
| 82 | u64 rx_packets; |
| 83 | u64 tx_bytes; |
| 84 | u64 tx_packets; |
| 85 | struct u64_stats_sync syncp; |
| 86 | }; |
| 87 | |
| 88 | /** |
| 89 | * struct net_bridge_vlan - per-vlan entry |
| 90 | * |
| 91 | * @vnode: rhashtable member |
| 92 | * @vid: VLAN id |
| 93 | * @flags: bridge vlan flags |
| 94 | * @stats: per-cpu VLAN statistics |
| 95 | * @br: if MASTER flag set, this points to a bridge struct |
| 96 | * @port: if MASTER flag unset, this points to a port struct |
| 97 | * @refcnt: if MASTER flag set, this is bumped for each port referencing it |
| 98 | * @brvlan: if MASTER flag unset, this points to the global per-VLAN context |
| 99 | * for this VLAN entry |
| 100 | * @vlist: sorted list of VLAN entries |
| 101 | * @rcu: used for entry destruction |
| 102 | * |
| 103 | * This structure is shared between the global per-VLAN entries contained in |
| 104 | * the bridge rhashtable and the local per-port per-VLAN entries contained in |
| 105 | * the port's rhashtable. The union entries should be interpreted depending on |
| 106 | * the entry flags that are set. |
| 107 | */ |
| 108 | struct net_bridge_vlan { |
| 109 | struct rhash_head vnode; |
| 110 | u16 vid; |
| 111 | u16 flags; |
| 112 | struct br_vlan_stats __percpu *stats; |
| 113 | union { |
| 114 | struct net_bridge *br; |
| 115 | struct net_bridge_port *port; |
| 116 | }; |
| 117 | union { |
| 118 | atomic_t refcnt; |
| 119 | struct net_bridge_vlan *brvlan; |
| 120 | }; |
| 121 | struct list_head vlist; |
| 122 | |
| 123 | struct rcu_head rcu; |
| 124 | }; |
| 125 | |
| 126 | /** |
| 127 | * struct net_bridge_vlan_group |
| 128 | * |
| 129 | * @vlan_hash: VLAN entry rhashtable |
| 130 | * @vlan_list: sorted VLAN entry list |
| 131 | * @num_vlans: number of total VLAN entries |
| 132 | * @pvid: PVID VLAN id |
| 133 | * |
| 134 | * IMPORTANT: Be careful when checking if there're VLAN entries using list |
| 135 | * primitives because the bridge can have entries in its list which |
| 136 | * are just for global context but not for filtering, i.e. they have |
| 137 | * the master flag set but not the brentry flag. If you have to check |
| 138 | * if there're "real" entries in the bridge please test @num_vlans |
| 139 | */ |
| 140 | struct net_bridge_vlan_group { |
| 141 | struct rhashtable vlan_hash; |
| 142 | struct list_head vlan_list; |
| 143 | u16 num_vlans; |
| 144 | u16 pvid; |
| 145 | }; |
| 146 | |
| 147 | struct net_bridge_fdb_entry |
| 148 | { |
| 149 | struct hlist_node hlist; |
| 150 | struct net_bridge_port *dst; |
| 151 | |
| 152 | unsigned long updated; |
| 153 | unsigned long used; |
| 154 | mac_addr addr; |
| 155 | __u16 vlan_id; |
| 156 | unsigned char is_local:1, |
| 157 | is_static:1, |
| 158 | added_by_user:1, |
| 159 | added_by_external_learn:1; |
| 160 | struct rcu_head rcu; |
| 161 | }; |
| 162 | |
| 163 | #define MDB_PG_FLAGS_PERMANENT BIT(0) |
| 164 | #define MDB_PG_FLAGS_OFFLOAD BIT(1) |
| 165 | |
| 166 | struct net_bridge_port_group { |
| 167 | struct net_bridge_port *port; |
| 168 | struct net_bridge_port_group __rcu *next; |
| 169 | struct hlist_node mglist; |
| 170 | struct rcu_head rcu; |
| 171 | struct timer_list timer; |
| 172 | struct br_ip addr; |
| 173 | unsigned char flags; |
| 174 | }; |
| 175 | |
| 176 | struct net_bridge_mdb_entry |
| 177 | { |
| 178 | struct hlist_node hlist[2]; |
| 179 | struct net_bridge *br; |
| 180 | struct net_bridge_port_group __rcu *ports; |
| 181 | struct rcu_head rcu; |
| 182 | struct timer_list timer; |
| 183 | struct br_ip addr; |
| 184 | bool mglist; |
| 185 | }; |
| 186 | |
| 187 | struct net_bridge_mdb_htable |
| 188 | { |
| 189 | struct hlist_head *mhash; |
| 190 | struct rcu_head rcu; |
| 191 | struct net_bridge_mdb_htable *old; |
| 192 | u32 size; |
| 193 | u32 max; |
| 194 | u32 secret; |
| 195 | u32 ver; |
| 196 | }; |
| 197 | |
| 198 | struct net_bridge_port |
| 199 | { |
| 200 | struct net_bridge *br; |
| 201 | struct net_device *dev; |
| 202 | struct list_head list; |
| 203 | |
| 204 | /* STP */ |
| 205 | u8 priority; |
| 206 | u8 state; |
| 207 | u16 port_no; |
| 208 | unsigned char topology_change_ack; |
| 209 | unsigned char config_pending; |
| 210 | port_id port_id; |
| 211 | port_id designated_port; |
| 212 | bridge_id designated_root; |
| 213 | bridge_id designated_bridge; |
| 214 | u32 path_cost; |
| 215 | u32 designated_cost; |
| 216 | unsigned long designated_age; |
| 217 | |
| 218 | struct timer_list forward_delay_timer; |
| 219 | struct timer_list hold_timer; |
| 220 | struct timer_list message_age_timer; |
| 221 | struct kobject kobj; |
| 222 | struct rcu_head rcu; |
| 223 | |
| 224 | unsigned long flags; |
| 225 | |
| 226 | #ifdef CONFIG_BRIDGE_IGMP_SNOOPING |
| 227 | struct bridge_mcast_own_query ip4_own_query; |
| 228 | #if IS_ENABLED(CONFIG_IPV6) |
| 229 | struct bridge_mcast_own_query ip6_own_query; |
| 230 | #endif /* IS_ENABLED(CONFIG_IPV6) */ |
| 231 | unsigned char multicast_router; |
| 232 | struct timer_list multicast_router_timer; |
| 233 | struct hlist_head mglist; |
| 234 | struct hlist_node rlist; |
| 235 | #endif |
| 236 | |
| 237 | #ifdef CONFIG_SYSFS |
| 238 | char sysfs_name[IFNAMSIZ]; |
| 239 | #endif |
| 240 | |
| 241 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 242 | struct netpoll *np; |
| 243 | #endif |
| 244 | #ifdef CONFIG_BRIDGE_VLAN_FILTERING |
| 245 | struct net_bridge_vlan_group __rcu *vlgrp; |
| 246 | #endif |
| 247 | }; |
| 248 | |
| 249 | #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) |
| 250 | #define br_promisc_port(p) ((p)->flags & BR_PROMISC) |
| 251 | |
| 252 | #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT) |
| 253 | |
| 254 | static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) |
| 255 | { |
| 256 | return rcu_dereference(dev->rx_handler_data); |
| 257 | } |
| 258 | |
| 259 | static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) |
| 260 | { |
| 261 | return br_port_exists(dev) ? |
| 262 | rtnl_dereference(dev->rx_handler_data) : NULL; |
| 263 | } |
| 264 | |
| 265 | struct net_bridge |
| 266 | { |
| 267 | spinlock_t lock; |
| 268 | struct list_head port_list; |
| 269 | struct net_device *dev; |
| 270 | |
| 271 | struct pcpu_sw_netstats __percpu *stats; |
| 272 | spinlock_t hash_lock; |
| 273 | struct hlist_head hash[BR_HASH_SIZE]; |
| 274 | #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) |
| 275 | union { |
| 276 | struct rtable fake_rtable; |
| 277 | struct rt6_info fake_rt6_info; |
| 278 | }; |
| 279 | bool nf_call_iptables; |
| 280 | bool nf_call_ip6tables; |
| 281 | bool nf_call_arptables; |
| 282 | #endif |
| 283 | u16 group_fwd_mask; |
| 284 | u16 group_fwd_mask_required; |
| 285 | |
| 286 | /* STP */ |
| 287 | bridge_id designated_root; |
| 288 | bridge_id bridge_id; |
| 289 | u32 root_path_cost; |
| 290 | unsigned long max_age; |
| 291 | unsigned long hello_time; |
| 292 | unsigned long forward_delay; |
| 293 | unsigned long bridge_max_age; |
| 294 | unsigned long ageing_time; |
| 295 | unsigned long bridge_hello_time; |
| 296 | unsigned long bridge_forward_delay; |
| 297 | |
| 298 | u8 group_addr[ETH_ALEN]; |
| 299 | bool group_addr_set; |
| 300 | u16 root_port; |
| 301 | |
| 302 | enum { |
| 303 | BR_NO_STP, /* no spanning tree */ |
| 304 | BR_KERNEL_STP, /* old STP in kernel */ |
| 305 | BR_USER_STP, /* new RSTP in userspace */ |
| 306 | } stp_enabled; |
| 307 | |
| 308 | unsigned char topology_change; |
| 309 | unsigned char topology_change_detected; |
| 310 | |
| 311 | #ifdef CONFIG_BRIDGE_IGMP_SNOOPING |
| 312 | unsigned char multicast_router; |
| 313 | |
| 314 | u8 multicast_disabled:1; |
| 315 | u8 multicast_querier:1; |
| 316 | u8 multicast_query_use_ifaddr:1; |
| 317 | u8 has_ipv6_addr:1; |
| 318 | |
| 319 | u32 hash_elasticity; |
| 320 | u32 hash_max; |
| 321 | |
| 322 | u32 multicast_last_member_count; |
| 323 | u32 multicast_startup_query_count; |
| 324 | |
| 325 | unsigned long multicast_last_member_interval; |
| 326 | unsigned long multicast_membership_interval; |
| 327 | unsigned long multicast_querier_interval; |
| 328 | unsigned long multicast_query_interval; |
| 329 | unsigned long multicast_query_response_interval; |
| 330 | unsigned long multicast_startup_query_interval; |
| 331 | |
| 332 | spinlock_t multicast_lock; |
| 333 | struct net_bridge_mdb_htable __rcu *mdb; |
| 334 | struct hlist_head router_list; |
| 335 | |
| 336 | struct timer_list multicast_router_timer; |
| 337 | struct bridge_mcast_other_query ip4_other_query; |
| 338 | struct bridge_mcast_own_query ip4_own_query; |
| 339 | struct bridge_mcast_querier ip4_querier; |
| 340 | #if IS_ENABLED(CONFIG_IPV6) |
| 341 | struct bridge_mcast_other_query ip6_other_query; |
| 342 | struct bridge_mcast_own_query ip6_own_query; |
| 343 | struct bridge_mcast_querier ip6_querier; |
| 344 | #endif /* IS_ENABLED(CONFIG_IPV6) */ |
| 345 | #endif |
| 346 | |
| 347 | struct timer_list hello_timer; |
| 348 | struct timer_list tcn_timer; |
| 349 | struct timer_list topology_change_timer; |
| 350 | struct timer_list gc_timer; |
| 351 | struct kobject *ifobj; |
| 352 | u32 auto_cnt; |
| 353 | #ifdef CONFIG_BRIDGE_VLAN_FILTERING |
| 354 | struct net_bridge_vlan_group __rcu *vlgrp; |
| 355 | u8 vlan_enabled; |
| 356 | u8 vlan_stats_enabled; |
| 357 | __be16 vlan_proto; |
| 358 | u16 default_pvid; |
| 359 | #endif |
| 360 | }; |
| 361 | |
| 362 | struct br_input_skb_cb { |
| 363 | struct net_device *brdev; |
| 364 | |
| 365 | #ifdef CONFIG_BRIDGE_IGMP_SNOOPING |
| 366 | int igmp; |
| 367 | int mrouters_only; |
| 368 | #endif |
| 369 | |
| 370 | bool proxyarp_replied; |
| 371 | |
| 372 | #ifdef CONFIG_BRIDGE_VLAN_FILTERING |
| 373 | bool vlan_filtered; |
| 374 | #endif |
| 375 | }; |
| 376 | |
| 377 | #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) |
| 378 | |
| 379 | #ifdef CONFIG_BRIDGE_IGMP_SNOOPING |
| 380 | # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) |
| 381 | #else |
| 382 | # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) |
| 383 | #endif |
| 384 | |
| 385 | #define br_printk(level, br, format, args...) \ |
| 386 | printk(level "%s: " format, (br)->dev->name, ##args) |
| 387 | |
| 388 | #define br_err(__br, format, args...) \ |
| 389 | br_printk(KERN_ERR, __br, format, ##args) |
| 390 | #define br_warn(__br, format, args...) \ |
| 391 | br_printk(KERN_WARNING, __br, format, ##args) |
| 392 | #define br_notice(__br, format, args...) \ |
| 393 | br_printk(KERN_NOTICE, __br, format, ##args) |
| 394 | #define br_info(__br, format, args...) \ |
| 395 | br_printk(KERN_INFO, __br, format, ##args) |
| 396 | |
| 397 | #define br_debug(br, format, args...) \ |
| 398 | pr_debug("%s: " format, (br)->dev->name, ##args) |
| 399 | |
| 400 | /* called under bridge lock */ |
| 401 | static inline int br_is_root_bridge(const struct net_bridge *br) |
| 402 | { |
| 403 | return !memcmp(&br->bridge_id, &br->designated_root, 8); |
| 404 | } |
| 405 | |
| 406 | /* check if a VLAN entry is global */ |
| 407 | static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) |
| 408 | { |
| 409 | return v->flags & BRIDGE_VLAN_INFO_MASTER; |
| 410 | } |
| 411 | |
| 412 | /* check if a VLAN entry is used by the bridge */ |
| 413 | static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) |
| 414 | { |
| 415 | return v->flags & BRIDGE_VLAN_INFO_BRENTRY; |
| 416 | } |
| 417 | |
| 418 | /* check if we should use the vlan entry, returns false if it's only context */ |
| 419 | static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) |
| 420 | { |
| 421 | if (br_vlan_is_master(v)) { |
| 422 | if (br_vlan_is_brentry(v)) |
| 423 | return true; |
| 424 | else |
| 425 | return false; |
| 426 | } |
| 427 | |
| 428 | return true; |
| 429 | } |
| 430 | |
| 431 | /* br_device.c */ |
| 432 | void br_dev_setup(struct net_device *dev); |
| 433 | void br_dev_delete(struct net_device *dev, struct list_head *list); |
| 434 | netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); |
| 435 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 436 | static inline void br_netpoll_send_skb(const struct net_bridge_port *p, |
| 437 | struct sk_buff *skb) |
| 438 | { |
| 439 | struct netpoll *np = p->np; |
| 440 | |
| 441 | if (np) |
| 442 | netpoll_send_skb(np, skb); |
| 443 | } |
| 444 | |
| 445 | int br_netpoll_enable(struct net_bridge_port *p); |
| 446 | void br_netpoll_disable(struct net_bridge_port *p); |
| 447 | #else |
| 448 | static inline void br_netpoll_send_skb(const struct net_bridge_port *p, |
| 449 | struct sk_buff *skb) |
| 450 | { |
| 451 | } |
| 452 | |
| 453 | static inline int br_netpoll_enable(struct net_bridge_port *p) |
| 454 | { |
| 455 | return 0; |
| 456 | } |
| 457 | |
| 458 | static inline void br_netpoll_disable(struct net_bridge_port *p) |
| 459 | { |
| 460 | } |
| 461 | #endif |
| 462 | |
| 463 | /* br_fdb.c */ |
| 464 | int br_fdb_init(void); |
| 465 | void br_fdb_fini(void); |
| 466 | void br_fdb_flush(struct net_bridge *br); |
| 467 | void br_fdb_find_delete_local(struct net_bridge *br, |
| 468 | const struct net_bridge_port *p, |
| 469 | const unsigned char *addr, u16 vid); |
| 470 | void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); |
| 471 | void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); |
| 472 | void br_fdb_cleanup(unsigned long arg); |
| 473 | void br_fdb_delete_by_port(struct net_bridge *br, |
| 474 | const struct net_bridge_port *p, u16 vid, int do_all); |
| 475 | struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, |
| 476 | const unsigned char *addr, __u16 vid); |
| 477 | int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); |
| 478 | int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, |
| 479 | unsigned long off); |
| 480 | int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, |
| 481 | const unsigned char *addr, u16 vid); |
| 482 | void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, |
| 483 | const unsigned char *addr, u16 vid, bool added_by_user); |
| 484 | |
| 485 | int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], |
| 486 | struct net_device *dev, const unsigned char *addr, u16 vid); |
| 487 | int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, |
| 488 | const unsigned char *addr, u16 vid, u16 nlh_flags); |
| 489 | int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, |
| 490 | struct net_device *dev, struct net_device *fdev, int idx); |
| 491 | int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); |
| 492 | void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); |
| 493 | int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, |
| 494 | const unsigned char *addr, u16 vid); |
| 495 | int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, |
| 496 | const unsigned char *addr, u16 vid); |
| 497 | |
| 498 | /* br_forward.c */ |
| 499 | void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb); |
| 500 | int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); |
| 501 | void br_forward(const struct net_bridge_port *to, |
| 502 | struct sk_buff *skb, struct sk_buff *skb0); |
| 503 | int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); |
| 504 | void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast); |
| 505 | void br_flood_forward(struct net_bridge *br, struct sk_buff *skb, |
| 506 | struct sk_buff *skb2, bool unicast); |
| 507 | |
| 508 | /* br_if.c */ |
| 509 | void br_port_carrier_check(struct net_bridge_port *p); |
| 510 | int br_add_bridge(struct net *net, const char *name); |
| 511 | int br_del_bridge(struct net *net, const char *name); |
| 512 | int br_add_if(struct net_bridge *br, struct net_device *dev); |
| 513 | int br_del_if(struct net_bridge *br, struct net_device *dev); |
| 514 | int br_min_mtu(const struct net_bridge *br); |
| 515 | netdev_features_t br_features_recompute(struct net_bridge *br, |
| 516 | netdev_features_t features); |
| 517 | void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); |
| 518 | void br_manage_promisc(struct net_bridge *br); |
| 519 | |
| 520 | /* br_input.c */ |
| 521 | int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); |
| 522 | rx_handler_result_t br_handle_frame(struct sk_buff **pskb); |
| 523 | |
| 524 | static inline bool br_rx_handler_check_rcu(const struct net_device *dev) |
| 525 | { |
| 526 | return rcu_dereference(dev->rx_handler) == br_handle_frame; |
| 527 | } |
| 528 | |
| 529 | static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) |
| 530 | { |
| 531 | return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; |
| 532 | } |
| 533 | |
| 534 | /* br_ioctl.c */ |
| 535 | int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); |
| 536 | int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, |
| 537 | void __user *arg); |
| 538 | |
| 539 | /* br_multicast.c */ |
| 540 | #ifdef CONFIG_BRIDGE_IGMP_SNOOPING |
| 541 | extern unsigned int br_mdb_rehash_seq; |
| 542 | int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, |
| 543 | struct sk_buff *skb, u16 vid); |
| 544 | struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, |
| 545 | struct sk_buff *skb, u16 vid); |
| 546 | void br_multicast_add_port(struct net_bridge_port *port); |
| 547 | void br_multicast_del_port(struct net_bridge_port *port); |
| 548 | void br_multicast_enable_port(struct net_bridge_port *port); |
| 549 | void br_multicast_disable_port(struct net_bridge_port *port); |
| 550 | void br_multicast_init(struct net_bridge *br); |
| 551 | void br_multicast_open(struct net_bridge *br); |
| 552 | void br_multicast_stop(struct net_bridge *br); |
| 553 | void br_multicast_dev_del(struct net_bridge *br); |
| 554 | void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, |
| 555 | struct sk_buff *skb); |
| 556 | void br_multicast_forward(struct net_bridge_mdb_entry *mdst, |
| 557 | struct sk_buff *skb, struct sk_buff *skb2); |
| 558 | int br_multicast_set_router(struct net_bridge *br, unsigned long val); |
| 559 | int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); |
| 560 | int br_multicast_toggle(struct net_bridge *br, unsigned long val); |
| 561 | int br_multicast_set_querier(struct net_bridge *br, unsigned long val); |
| 562 | int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); |
| 563 | struct net_bridge_mdb_entry * |
| 564 | br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst); |
| 565 | struct net_bridge_mdb_entry * |
| 566 | br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port, |
| 567 | struct br_ip *group); |
| 568 | void br_multicast_free_pg(struct rcu_head *head); |
| 569 | struct net_bridge_port_group * |
| 570 | br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, |
| 571 | struct net_bridge_port_group __rcu *next, |
| 572 | unsigned char flags); |
| 573 | void br_mdb_init(void); |
| 574 | void br_mdb_uninit(void); |
| 575 | void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, |
| 576 | struct br_ip *group, int type, u8 flags); |
| 577 | void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port, |
| 578 | int type); |
| 579 | |
| 580 | #define mlock_dereference(X, br) \ |
| 581 | rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) |
| 582 | |
| 583 | static inline bool br_multicast_is_router(struct net_bridge *br) |
| 584 | { |
| 585 | return br->multicast_router == 2 || |
| 586 | (br->multicast_router == 1 && |
| 587 | timer_pending(&br->multicast_router_timer)); |
| 588 | } |
| 589 | |
| 590 | static inline bool |
| 591 | __br_multicast_querier_exists(struct net_bridge *br, |
| 592 | struct bridge_mcast_other_query *querier, |
| 593 | const bool is_ipv6) |
| 594 | { |
| 595 | bool own_querier_enabled; |
| 596 | |
| 597 | if (br->multicast_querier) { |
| 598 | if (is_ipv6 && !br->has_ipv6_addr) |
| 599 | own_querier_enabled = false; |
| 600 | else |
| 601 | own_querier_enabled = true; |
| 602 | } else { |
| 603 | own_querier_enabled = false; |
| 604 | } |
| 605 | |
| 606 | return time_is_before_jiffies(querier->delay_time) && |
| 607 | (own_querier_enabled || timer_pending(&querier->timer)); |
| 608 | } |
| 609 | |
| 610 | static inline bool br_multicast_querier_exists(struct net_bridge *br, |
| 611 | struct ethhdr *eth) |
| 612 | { |
| 613 | switch (eth->h_proto) { |
| 614 | case (htons(ETH_P_IP)): |
| 615 | return __br_multicast_querier_exists(br, |
| 616 | &br->ip4_other_query, false); |
| 617 | #if IS_ENABLED(CONFIG_IPV6) |
| 618 | case (htons(ETH_P_IPV6)): |
| 619 | return __br_multicast_querier_exists(br, |
| 620 | &br->ip6_other_query, true); |
| 621 | #endif |
| 622 | default: |
| 623 | return false; |
| 624 | } |
| 625 | } |
| 626 | #else |
| 627 | static inline int br_multicast_rcv(struct net_bridge *br, |
| 628 | struct net_bridge_port *port, |
| 629 | struct sk_buff *skb, |
| 630 | u16 vid) |
| 631 | { |
| 632 | return 0; |
| 633 | } |
| 634 | |
| 635 | static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, |
| 636 | struct sk_buff *skb, u16 vid) |
| 637 | { |
| 638 | return NULL; |
| 639 | } |
| 640 | |
| 641 | static inline void br_multicast_add_port(struct net_bridge_port *port) |
| 642 | { |
| 643 | } |
| 644 | |
| 645 | static inline void br_multicast_del_port(struct net_bridge_port *port) |
| 646 | { |
| 647 | } |
| 648 | |
| 649 | static inline void br_multicast_enable_port(struct net_bridge_port *port) |
| 650 | { |
| 651 | } |
| 652 | |
| 653 | static inline void br_multicast_disable_port(struct net_bridge_port *port) |
| 654 | { |
| 655 | } |
| 656 | |
| 657 | static inline void br_multicast_init(struct net_bridge *br) |
| 658 | { |
| 659 | } |
| 660 | |
| 661 | static inline void br_multicast_open(struct net_bridge *br) |
| 662 | { |
| 663 | } |
| 664 | |
| 665 | static inline void br_multicast_stop(struct net_bridge *br) |
| 666 | { |
| 667 | } |
| 668 | |
| 669 | static inline void br_multicast_dev_del(struct net_bridge *br) |
| 670 | { |
| 671 | } |
| 672 | |
| 673 | static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, |
| 674 | struct sk_buff *skb) |
| 675 | { |
| 676 | } |
| 677 | |
| 678 | static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst, |
| 679 | struct sk_buff *skb, |
| 680 | struct sk_buff *skb2) |
| 681 | { |
| 682 | } |
| 683 | static inline bool br_multicast_is_router(struct net_bridge *br) |
| 684 | { |
| 685 | return 0; |
| 686 | } |
| 687 | static inline bool br_multicast_querier_exists(struct net_bridge *br, |
| 688 | struct ethhdr *eth) |
| 689 | { |
| 690 | return false; |
| 691 | } |
| 692 | static inline void br_mdb_init(void) |
| 693 | { |
| 694 | } |
| 695 | static inline void br_mdb_uninit(void) |
| 696 | { |
| 697 | } |
| 698 | #endif |
| 699 | |
| 700 | /* br_vlan.c */ |
| 701 | #ifdef CONFIG_BRIDGE_VLAN_FILTERING |
| 702 | bool br_allowed_ingress(const struct net_bridge *br, |
| 703 | struct net_bridge_vlan_group *vg, struct sk_buff *skb, |
| 704 | u16 *vid); |
| 705 | bool br_allowed_egress(struct net_bridge_vlan_group *vg, |
| 706 | const struct sk_buff *skb); |
| 707 | bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); |
| 708 | struct sk_buff *br_handle_vlan(struct net_bridge *br, |
| 709 | struct net_bridge_vlan_group *vg, |
| 710 | struct sk_buff *skb); |
| 711 | int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags); |
| 712 | int br_vlan_delete(struct net_bridge *br, u16 vid); |
| 713 | void br_vlan_flush(struct net_bridge *br); |
| 714 | struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); |
| 715 | void br_recalculate_fwd_mask(struct net_bridge *br); |
| 716 | int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); |
| 717 | int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); |
| 718 | int __br_vlan_set_proto(struct net_bridge *br, __be16 proto); |
| 719 | int br_vlan_set_proto(struct net_bridge *br, unsigned long val); |
| 720 | int br_vlan_set_stats(struct net_bridge *br, unsigned long val); |
| 721 | int br_vlan_init(struct net_bridge *br); |
| 722 | int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val); |
| 723 | int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid); |
| 724 | int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags); |
| 725 | int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); |
| 726 | void nbp_vlan_flush(struct net_bridge_port *port); |
| 727 | int nbp_vlan_init(struct net_bridge_port *port); |
| 728 | int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); |
| 729 | void br_vlan_get_stats(const struct net_bridge_vlan *v, |
| 730 | struct br_vlan_stats *stats); |
| 731 | |
| 732 | static inline struct net_bridge_vlan_group *br_vlan_group( |
| 733 | const struct net_bridge *br) |
| 734 | { |
| 735 | return rtnl_dereference(br->vlgrp); |
| 736 | } |
| 737 | |
| 738 | static inline struct net_bridge_vlan_group *nbp_vlan_group( |
| 739 | const struct net_bridge_port *p) |
| 740 | { |
| 741 | return rtnl_dereference(p->vlgrp); |
| 742 | } |
| 743 | |
| 744 | static inline struct net_bridge_vlan_group *br_vlan_group_rcu( |
| 745 | const struct net_bridge *br) |
| 746 | { |
| 747 | return rcu_dereference(br->vlgrp); |
| 748 | } |
| 749 | |
| 750 | static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( |
| 751 | const struct net_bridge_port *p) |
| 752 | { |
| 753 | return rcu_dereference(p->vlgrp); |
| 754 | } |
| 755 | |
| 756 | /* Since bridge now depends on 8021Q module, but the time bridge sees the |
| 757 | * skb, the vlan tag will always be present if the frame was tagged. |
| 758 | */ |
| 759 | static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) |
| 760 | { |
| 761 | int err = 0; |
| 762 | |
| 763 | if (skb_vlan_tag_present(skb)) { |
| 764 | *vid = skb_vlan_tag_get(skb) & VLAN_VID_MASK; |
| 765 | } else { |
| 766 | *vid = 0; |
| 767 | err = -EINVAL; |
| 768 | } |
| 769 | |
| 770 | return err; |
| 771 | } |
| 772 | |
| 773 | static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) |
| 774 | { |
| 775 | if (!vg) |
| 776 | return 0; |
| 777 | |
| 778 | smp_rmb(); |
| 779 | return vg->pvid; |
| 780 | } |
| 781 | |
| 782 | static inline int br_vlan_enabled(struct net_bridge *br) |
| 783 | { |
| 784 | return br->vlan_enabled; |
| 785 | } |
| 786 | #else |
| 787 | static inline bool br_allowed_ingress(const struct net_bridge *br, |
| 788 | struct net_bridge_vlan_group *vg, |
| 789 | struct sk_buff *skb, |
| 790 | u16 *vid) |
| 791 | { |
| 792 | return true; |
| 793 | } |
| 794 | |
| 795 | static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, |
| 796 | const struct sk_buff *skb) |
| 797 | { |
| 798 | return true; |
| 799 | } |
| 800 | |
| 801 | static inline bool br_should_learn(struct net_bridge_port *p, |
| 802 | struct sk_buff *skb, u16 *vid) |
| 803 | { |
| 804 | return true; |
| 805 | } |
| 806 | |
| 807 | static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, |
| 808 | struct net_bridge_vlan_group *vg, |
| 809 | struct sk_buff *skb) |
| 810 | { |
| 811 | return skb; |
| 812 | } |
| 813 | |
| 814 | static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags) |
| 815 | { |
| 816 | return -EOPNOTSUPP; |
| 817 | } |
| 818 | |
| 819 | static inline int br_vlan_delete(struct net_bridge *br, u16 vid) |
| 820 | { |
| 821 | return -EOPNOTSUPP; |
| 822 | } |
| 823 | |
| 824 | static inline void br_vlan_flush(struct net_bridge *br) |
| 825 | { |
| 826 | } |
| 827 | |
| 828 | static inline void br_recalculate_fwd_mask(struct net_bridge *br) |
| 829 | { |
| 830 | } |
| 831 | |
| 832 | static inline int br_vlan_init(struct net_bridge *br) |
| 833 | { |
| 834 | return 0; |
| 835 | } |
| 836 | |
| 837 | static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags) |
| 838 | { |
| 839 | return -EOPNOTSUPP; |
| 840 | } |
| 841 | |
| 842 | static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) |
| 843 | { |
| 844 | return -EOPNOTSUPP; |
| 845 | } |
| 846 | |
| 847 | static inline void nbp_vlan_flush(struct net_bridge_port *port) |
| 848 | { |
| 849 | } |
| 850 | |
| 851 | static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, |
| 852 | u16 vid) |
| 853 | { |
| 854 | return NULL; |
| 855 | } |
| 856 | |
| 857 | static inline int nbp_vlan_init(struct net_bridge_port *port) |
| 858 | { |
| 859 | return 0; |
| 860 | } |
| 861 | |
| 862 | static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) |
| 863 | { |
| 864 | return 0; |
| 865 | } |
| 866 | |
| 867 | static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) |
| 868 | { |
| 869 | return 0; |
| 870 | } |
| 871 | |
| 872 | static inline int br_vlan_enabled(struct net_bridge *br) |
| 873 | { |
| 874 | return 0; |
| 875 | } |
| 876 | |
| 877 | static inline int __br_vlan_filter_toggle(struct net_bridge *br, |
| 878 | unsigned long val) |
| 879 | { |
| 880 | return -EOPNOTSUPP; |
| 881 | } |
| 882 | |
| 883 | static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, |
| 884 | u32 filter_mask) |
| 885 | { |
| 886 | return 0; |
| 887 | } |
| 888 | |
| 889 | static inline struct net_bridge_vlan_group *br_vlan_group( |
| 890 | const struct net_bridge *br) |
| 891 | { |
| 892 | return NULL; |
| 893 | } |
| 894 | |
| 895 | static inline struct net_bridge_vlan_group *nbp_vlan_group( |
| 896 | const struct net_bridge_port *p) |
| 897 | { |
| 898 | return NULL; |
| 899 | } |
| 900 | |
| 901 | static inline struct net_bridge_vlan_group *br_vlan_group_rcu( |
| 902 | const struct net_bridge *br) |
| 903 | { |
| 904 | return NULL; |
| 905 | } |
| 906 | |
| 907 | static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( |
| 908 | const struct net_bridge_port *p) |
| 909 | { |
| 910 | return NULL; |
| 911 | } |
| 912 | |
| 913 | static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, |
| 914 | struct br_vlan_stats *stats) |
| 915 | { |
| 916 | } |
| 917 | #endif |
| 918 | |
| 919 | struct nf_br_ops { |
| 920 | int (*br_dev_xmit_hook)(struct sk_buff *skb); |
| 921 | }; |
| 922 | extern const struct nf_br_ops __rcu *nf_br_ops; |
| 923 | |
| 924 | /* br_netfilter.c */ |
| 925 | #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) |
| 926 | int br_nf_core_init(void); |
| 927 | void br_nf_core_fini(void); |
| 928 | void br_netfilter_rtable_init(struct net_bridge *); |
| 929 | #else |
| 930 | static inline int br_nf_core_init(void) { return 0; } |
| 931 | static inline void br_nf_core_fini(void) {} |
| 932 | #define br_netfilter_rtable_init(x) |
| 933 | #endif |
| 934 | |
| 935 | /* br_stp.c */ |
| 936 | void br_set_state(struct net_bridge_port *p, unsigned int state); |
| 937 | struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); |
| 938 | void br_init_port(struct net_bridge_port *p); |
| 939 | void br_become_designated_port(struct net_bridge_port *p); |
| 940 | |
| 941 | void __br_set_forward_delay(struct net_bridge *br, unsigned long t); |
| 942 | int br_set_forward_delay(struct net_bridge *br, unsigned long x); |
| 943 | int br_set_hello_time(struct net_bridge *br, unsigned long x); |
| 944 | int br_set_max_age(struct net_bridge *br, unsigned long x); |
| 945 | int br_set_ageing_time(struct net_bridge *br, u32 ageing_time); |
| 946 | |
| 947 | |
| 948 | /* br_stp_if.c */ |
| 949 | void br_stp_enable_bridge(struct net_bridge *br); |
| 950 | void br_stp_disable_bridge(struct net_bridge *br); |
| 951 | void br_stp_set_enabled(struct net_bridge *br, unsigned long val); |
| 952 | void br_stp_enable_port(struct net_bridge_port *p); |
| 953 | void br_stp_disable_port(struct net_bridge_port *p); |
| 954 | bool br_stp_recalculate_bridge_id(struct net_bridge *br); |
| 955 | void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); |
| 956 | void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); |
| 957 | int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); |
| 958 | int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); |
| 959 | ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); |
| 960 | |
| 961 | /* br_stp_bpdu.c */ |
| 962 | struct stp_proto; |
| 963 | void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, |
| 964 | struct net_device *dev); |
| 965 | |
| 966 | /* br_stp_timer.c */ |
| 967 | void br_stp_timer_init(struct net_bridge *br); |
| 968 | void br_stp_port_timer_init(struct net_bridge_port *p); |
| 969 | unsigned long br_timer_value(const struct timer_list *timer); |
| 970 | |
| 971 | /* br.c */ |
| 972 | #if IS_ENABLED(CONFIG_ATM_LANE) |
| 973 | extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); |
| 974 | #endif |
| 975 | |
| 976 | /* br_netlink.c */ |
| 977 | extern struct rtnl_link_ops br_link_ops; |
| 978 | int br_netlink_init(void); |
| 979 | void br_netlink_fini(void); |
| 980 | void br_ifinfo_notify(int event, struct net_bridge_port *port); |
| 981 | int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); |
| 982 | int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); |
| 983 | int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, |
| 984 | u32 filter_mask, int nlflags); |
| 985 | |
| 986 | #ifdef CONFIG_SYSFS |
| 987 | /* br_sysfs_if.c */ |
| 988 | extern const struct sysfs_ops brport_sysfs_ops; |
| 989 | int br_sysfs_addif(struct net_bridge_port *p); |
| 990 | int br_sysfs_renameif(struct net_bridge_port *p); |
| 991 | |
| 992 | /* br_sysfs_br.c */ |
| 993 | int br_sysfs_addbr(struct net_device *dev); |
| 994 | void br_sysfs_delbr(struct net_device *dev); |
| 995 | |
| 996 | #else |
| 997 | |
| 998 | static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } |
| 999 | static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } |
| 1000 | static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } |
| 1001 | static inline void br_sysfs_delbr(struct net_device *dev) { return; } |
| 1002 | #endif /* CONFIG_SYSFS */ |
| 1003 | |
| 1004 | #endif |