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
9 #ifndef _BR_PRIVATE_H
10 #define _BR_PRIVATE_H
11
12 #include <linux/netdevice.h>
13 #include <linux/if_bridge.h>
14 #include <linux/netpoll.h>
15 #include <linux/u64_stats_sync.h>
16 #include <net/route.h>
17 #include <net/ip6_fib.h>
18 #include <linux/if_vlan.h>
19 #include <linux/rhashtable.h>
20 #include <linux/refcount.h>
21
22 #define BR_HASH_BITS 8
23 #define BR_HASH_SIZE (1 << BR_HASH_BITS)
24
25 #define BR_HOLD_TIME (1*HZ)
26
27 #define BR_PORT_BITS 10
28 #define BR_MAX_PORTS (1<<BR_PORT_BITS)
29
30 #define BR_MULTICAST_DEFAULT_HASH_MAX 4096
31
32 #define BR_VERSION "2.3"
33
34 /* Control of forwarding link local multicast */
35 #define BR_GROUPFWD_DEFAULT 0
36 /* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */
37 enum {
38 BR_GROUPFWD_STP = BIT(0),
39 BR_GROUPFWD_MACPAUSE = BIT(1),
40 BR_GROUPFWD_LACP = BIT(2),
41 };
42
43 #define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \
44 BR_GROUPFWD_LACP)
45 /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
46 #define BR_GROUPFWD_8021AD 0xB801u
47
48 /* Path to usermode spanning tree program */
49 #define BR_STP_PROG "/sbin/bridge-stp"
50
51 #define BR_FDB_NOTIFY_SETTABLE_BITS (FDB_NOTIFY_BIT | FDB_NOTIFY_INACTIVE_BIT)
52
53 typedef struct bridge_id bridge_id;
54 typedef struct mac_addr mac_addr;
55 typedef __u16 port_id;
56
57 struct bridge_id {
58 unsigned char prio[2];
59 unsigned char addr[ETH_ALEN];
60 };
61
62 struct mac_addr {
63 unsigned char addr[ETH_ALEN];
64 };
65
66 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
67 /* our own querier */
68 struct bridge_mcast_own_query {
69 struct timer_list timer;
70 u32 startup_sent;
71 };
72
73 /* other querier */
74 struct bridge_mcast_other_query {
75 struct timer_list timer;
76 unsigned long delay_time;
77 };
78
79 /* selected querier */
80 struct bridge_mcast_querier {
81 struct br_ip addr;
82 struct net_bridge_port __rcu *port;
83 };
84
85 /* IGMP/MLD statistics */
86 struct bridge_mcast_stats {
87 struct br_mcast_stats mstats;
88 struct u64_stats_sync syncp;
89 };
90 #endif
91
92 struct br_tunnel_info {
93 __be64 tunnel_id;
94 struct metadata_dst *tunnel_dst;
95 };
96
97 /* private vlan flags */
98 enum {
99 BR_VLFLAG_PER_PORT_STATS = BIT(0),
100 BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1),
101 };
102
103 /**
104 * struct net_bridge_vlan - per-vlan entry
105 *
106 * @vnode: rhashtable member
107 * @vid: VLAN id
108 * @flags: bridge vlan flags
109 * @priv_flags: private (in-kernel) bridge vlan flags
110 * @state: STP state (e.g. blocking, learning, forwarding)
111 * @stats: per-cpu VLAN statistics
112 * @br: if MASTER flag set, this points to a bridge struct
113 * @port: if MASTER flag unset, this points to a port struct
114 * @refcnt: if MASTER flag set, this is bumped for each port referencing it
115 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
116 * for this VLAN entry
117 * @vlist: sorted list of VLAN entries
118 * @rcu: used for entry destruction
119 *
120 * This structure is shared between the global per-VLAN entries contained in
121 * the bridge rhashtable and the local per-port per-VLAN entries contained in
122 * the port's rhashtable. The union entries should be interpreted depending on
123 * the entry flags that are set.
124 */
125 struct net_bridge_vlan {
126 struct rhash_head vnode;
127 struct rhash_head tnode;
128 u16 vid;
129 u16 flags;
130 u16 priv_flags;
131 u8 state;
132 struct pcpu_sw_netstats __percpu *stats;
133 union {
134 struct net_bridge *br;
135 struct net_bridge_port *port;
136 };
137 union {
138 refcount_t refcnt;
139 struct net_bridge_vlan *brvlan;
140 };
141
142 struct br_tunnel_info tinfo;
143
144 struct list_head vlist;
145
146 struct rcu_head rcu;
147 };
148
149 /**
150 * struct net_bridge_vlan_group
151 *
152 * @vlan_hash: VLAN entry rhashtable
153 * @vlan_list: sorted VLAN entry list
154 * @num_vlans: number of total VLAN entries
155 * @pvid: PVID VLAN id
156 * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking)
157 *
158 * IMPORTANT: Be careful when checking if there're VLAN entries using list
159 * primitives because the bridge can have entries in its list which
160 * are just for global context but not for filtering, i.e. they have
161 * the master flag set but not the brentry flag. If you have to check
162 * if there're "real" entries in the bridge please test @num_vlans
163 */
164 struct net_bridge_vlan_group {
165 struct rhashtable vlan_hash;
166 struct rhashtable tunnel_hash;
167 struct list_head vlan_list;
168 u16 num_vlans;
169 u16 pvid;
170 u8 pvid_state;
171 };
172
173 /* bridge fdb flags */
174 enum {
175 BR_FDB_LOCAL,
176 BR_FDB_STATIC,
177 BR_FDB_STICKY,
178 BR_FDB_ADDED_BY_USER,
179 BR_FDB_ADDED_BY_EXT_LEARN,
180 BR_FDB_OFFLOADED,
181 BR_FDB_NOTIFY,
182 BR_FDB_NOTIFY_INACTIVE
183 };
184
185 struct net_bridge_fdb_key {
186 mac_addr addr;
187 u16 vlan_id;
188 };
189
190 struct net_bridge_fdb_entry {
191 struct rhash_head rhnode;
192 struct net_bridge_port *dst;
193
194 struct net_bridge_fdb_key key;
195 struct hlist_node fdb_node;
196 unsigned long flags;
197
198 /* write-heavy members should not affect lookups */
199 unsigned long updated ____cacheline_aligned_in_smp;
200 unsigned long used;
201
202 struct rcu_head rcu;
203 };
204
205 #define MDB_PG_FLAGS_PERMANENT BIT(0)
206 #define MDB_PG_FLAGS_OFFLOAD BIT(1)
207 #define MDB_PG_FLAGS_FAST_LEAVE BIT(2)
208 #define MDB_PG_FLAGS_STAR_EXCL BIT(3)
209 #define MDB_PG_FLAGS_BLOCKED BIT(4)
210
211 #define PG_SRC_ENT_LIMIT 32
212
213 #define BR_SGRP_F_DELETE BIT(0)
214 #define BR_SGRP_F_SEND BIT(1)
215 #define BR_SGRP_F_INSTALLED BIT(2)
216
217 struct net_bridge_mcast_gc {
218 struct hlist_node gc_node;
219 void (*destroy)(struct net_bridge_mcast_gc *gc);
220 };
221
222 struct net_bridge_group_src {
223 struct hlist_node node;
224
225 struct br_ip addr;
226 struct net_bridge_port_group *pg;
227 u8 flags;
228 u8 src_query_rexmit_cnt;
229 struct timer_list timer;
230
231 struct net_bridge *br;
232 struct net_bridge_mcast_gc mcast_gc;
233 struct rcu_head rcu;
234 };
235
236 struct net_bridge_port_group_sg_key {
237 struct net_bridge_port *port;
238 struct br_ip addr;
239 };
240
241 struct net_bridge_port_group {
242 struct net_bridge_port_group __rcu *next;
243 struct net_bridge_port_group_sg_key key;
244 unsigned char eth_addr[ETH_ALEN] __aligned(2);
245 unsigned char flags;
246 unsigned char filter_mode;
247 unsigned char grp_query_rexmit_cnt;
248 unsigned char rt_protocol;
249
250 struct hlist_head src_list;
251 unsigned int src_ents;
252 struct timer_list timer;
253 struct timer_list rexmit_timer;
254 struct hlist_node mglist;
255 struct rb_root eht_set_tree;
256 struct rb_root eht_host_tree;
257
258 struct rhash_head rhnode;
259 struct net_bridge_mcast_gc mcast_gc;
260 struct rcu_head rcu;
261 };
262
263 struct net_bridge_mdb_entry {
264 struct rhash_head rhnode;
265 struct net_bridge *br;
266 struct net_bridge_port_group __rcu *ports;
267 struct br_ip addr;
268 bool host_joined;
269
270 struct timer_list timer;
271 struct hlist_node mdb_node;
272
273 struct net_bridge_mcast_gc mcast_gc;
274 struct rcu_head rcu;
275 };
276
277 struct net_bridge_port {
278 struct net_bridge *br;
279 struct net_device *dev;
280 struct list_head list;
281
282 unsigned long flags;
283 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
284 struct net_bridge_vlan_group __rcu *vlgrp;
285 #endif
286 struct net_bridge_port __rcu *backup_port;
287
288 /* STP */
289 u8 priority;
290 u8 state;
291 u16 port_no;
292 unsigned char topology_change_ack;
293 unsigned char config_pending;
294 port_id port_id;
295 port_id designated_port;
296 bridge_id designated_root;
297 bridge_id designated_bridge;
298 u32 path_cost;
299 u32 designated_cost;
300 unsigned long designated_age;
301
302 struct timer_list forward_delay_timer;
303 struct timer_list hold_timer;
304 struct timer_list message_age_timer;
305 struct kobject kobj;
306 struct rcu_head rcu;
307
308 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
309 struct bridge_mcast_own_query ip4_own_query;
310 #if IS_ENABLED(CONFIG_IPV6)
311 struct bridge_mcast_own_query ip6_own_query;
312 #endif /* IS_ENABLED(CONFIG_IPV6) */
313 u32 multicast_eht_hosts_limit;
314 u32 multicast_eht_hosts_cnt;
315 unsigned char multicast_router;
316 struct bridge_mcast_stats __percpu *mcast_stats;
317 struct timer_list multicast_router_timer;
318 struct hlist_head mglist;
319 struct hlist_node rlist;
320 #endif
321
322 #ifdef CONFIG_SYSFS
323 char sysfs_name[IFNAMSIZ];
324 #endif
325
326 #ifdef CONFIG_NET_POLL_CONTROLLER
327 struct netpoll *np;
328 #endif
329 #ifdef CONFIG_NET_SWITCHDEV
330 int offload_fwd_mark;
331 #endif
332 u16 group_fwd_mask;
333 u16 backup_redirected_cnt;
334
335 struct bridge_stp_xstats stp_xstats;
336 };
337
338 #define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj)
339
340 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
341 #define br_promisc_port(p) ((p)->flags & BR_PROMISC)
342
br_port_get_rcu(const struct net_device * dev)343 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
344 {
345 return rcu_dereference(dev->rx_handler_data);
346 }
347
br_port_get_rtnl(const struct net_device * dev)348 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
349 {
350 return netif_is_bridge_port(dev) ?
351 rtnl_dereference(dev->rx_handler_data) : NULL;
352 }
353
br_port_get_rtnl_rcu(const struct net_device * dev)354 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev)
355 {
356 return netif_is_bridge_port(dev) ?
357 rcu_dereference_rtnl(dev->rx_handler_data) : NULL;
358 }
359
360 enum net_bridge_opts {
361 BROPT_VLAN_ENABLED,
362 BROPT_VLAN_STATS_ENABLED,
363 BROPT_NF_CALL_IPTABLES,
364 BROPT_NF_CALL_IP6TABLES,
365 BROPT_NF_CALL_ARPTABLES,
366 BROPT_GROUP_ADDR_SET,
367 BROPT_MULTICAST_ENABLED,
368 BROPT_MULTICAST_QUERIER,
369 BROPT_MULTICAST_QUERY_USE_IFADDR,
370 BROPT_MULTICAST_STATS_ENABLED,
371 BROPT_HAS_IPV6_ADDR,
372 BROPT_NEIGH_SUPPRESS_ENABLED,
373 BROPT_MTU_SET_BY_USER,
374 BROPT_VLAN_STATS_PER_PORT,
375 BROPT_NO_LL_LEARN,
376 BROPT_VLAN_BRIDGE_BINDING,
377 };
378
379 struct net_bridge {
380 spinlock_t lock;
381 spinlock_t hash_lock;
382 struct hlist_head frame_type_list;
383 struct net_device *dev;
384 unsigned long options;
385 /* These fields are accessed on each packet */
386 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
387 __be16 vlan_proto;
388 u16 default_pvid;
389 struct net_bridge_vlan_group __rcu *vlgrp;
390 #endif
391
392 struct rhashtable fdb_hash_tbl;
393 struct list_head port_list;
394 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
395 union {
396 struct rtable fake_rtable;
397 struct rt6_info fake_rt6_info;
398 };
399 #endif
400 u16 group_fwd_mask;
401 u16 group_fwd_mask_required;
402
403 /* STP */
404 bridge_id designated_root;
405 bridge_id bridge_id;
406 unsigned char topology_change;
407 unsigned char topology_change_detected;
408 u16 root_port;
409 unsigned long max_age;
410 unsigned long hello_time;
411 unsigned long forward_delay;
412 unsigned long ageing_time;
413 unsigned long bridge_max_age;
414 unsigned long bridge_hello_time;
415 unsigned long bridge_forward_delay;
416 unsigned long bridge_ageing_time;
417 u32 root_path_cost;
418
419 u8 group_addr[ETH_ALEN];
420
421 enum {
422 BR_NO_STP, /* no spanning tree */
423 BR_KERNEL_STP, /* old STP in kernel */
424 BR_USER_STP, /* new RSTP in userspace */
425 } stp_enabled;
426
427 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
428
429 u32 hash_max;
430
431 u32 multicast_last_member_count;
432 u32 multicast_startup_query_count;
433
434 u8 multicast_igmp_version;
435 u8 multicast_router;
436 #if IS_ENABLED(CONFIG_IPV6)
437 u8 multicast_mld_version;
438 #endif
439 spinlock_t multicast_lock;
440 unsigned long multicast_last_member_interval;
441 unsigned long multicast_membership_interval;
442 unsigned long multicast_querier_interval;
443 unsigned long multicast_query_interval;
444 unsigned long multicast_query_response_interval;
445 unsigned long multicast_startup_query_interval;
446
447 struct rhashtable mdb_hash_tbl;
448 struct rhashtable sg_port_tbl;
449
450 struct hlist_head mcast_gc_list;
451 struct hlist_head mdb_list;
452 struct hlist_head router_list;
453
454 struct timer_list multicast_router_timer;
455 struct bridge_mcast_other_query ip4_other_query;
456 struct bridge_mcast_own_query ip4_own_query;
457 struct bridge_mcast_querier ip4_querier;
458 struct bridge_mcast_stats __percpu *mcast_stats;
459 #if IS_ENABLED(CONFIG_IPV6)
460 struct bridge_mcast_other_query ip6_other_query;
461 struct bridge_mcast_own_query ip6_own_query;
462 struct bridge_mcast_querier ip6_querier;
463 #endif /* IS_ENABLED(CONFIG_IPV6) */
464 struct work_struct mcast_gc_work;
465 #endif
466
467 struct timer_list hello_timer;
468 struct timer_list tcn_timer;
469 struct timer_list topology_change_timer;
470 struct delayed_work gc_work;
471 struct kobject *ifobj;
472 u32 auto_cnt;
473
474 #ifdef CONFIG_NET_SWITCHDEV
475 int offload_fwd_mark;
476 #endif
477 struct hlist_head fdb_list;
478
479 #if IS_ENABLED(CONFIG_BRIDGE_MRP)
480 struct hlist_head mrp_list;
481 #endif
482 #if IS_ENABLED(CONFIG_BRIDGE_CFM)
483 struct hlist_head mep_list;
484 #endif
485 };
486
487 struct br_input_skb_cb {
488 struct net_device *brdev;
489
490 u16 frag_max_size;
491 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
492 u8 igmp;
493 u8 mrouters_only:1;
494 #endif
495 u8 proxyarp_replied:1;
496 u8 src_port_isolated:1;
497 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
498 u8 vlan_filtered:1;
499 #endif
500 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
501 u8 br_netfilter_broute:1;
502 #endif
503
504 #ifdef CONFIG_NET_SWITCHDEV
505 int offload_fwd_mark;
506 #endif
507 };
508
509 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
510
511 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
512 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
513 #else
514 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
515 #endif
516
517 #define br_printk(level, br, format, args...) \
518 printk(level "%s: " format, (br)->dev->name, ##args)
519
520 #define br_err(__br, format, args...) \
521 br_printk(KERN_ERR, __br, format, ##args)
522 #define br_warn(__br, format, args...) \
523 br_printk(KERN_WARNING, __br, format, ##args)
524 #define br_notice(__br, format, args...) \
525 br_printk(KERN_NOTICE, __br, format, ##args)
526 #define br_info(__br, format, args...) \
527 br_printk(KERN_INFO, __br, format, ##args)
528
529 #define br_debug(br, format, args...) \
530 pr_debug("%s: " format, (br)->dev->name, ##args)
531
532 /* called under bridge lock */
br_is_root_bridge(const struct net_bridge * br)533 static inline int br_is_root_bridge(const struct net_bridge *br)
534 {
535 return !memcmp(&br->bridge_id, &br->designated_root, 8);
536 }
537
538 /* check if a VLAN entry is global */
br_vlan_is_master(const struct net_bridge_vlan * v)539 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
540 {
541 return v->flags & BRIDGE_VLAN_INFO_MASTER;
542 }
543
544 /* check if a VLAN entry is used by the bridge */
br_vlan_is_brentry(const struct net_bridge_vlan * v)545 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
546 {
547 return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
548 }
549
550 /* check if we should use the vlan entry, returns false if it's only context */
br_vlan_should_use(const struct net_bridge_vlan * v)551 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
552 {
553 if (br_vlan_is_master(v)) {
554 if (br_vlan_is_brentry(v))
555 return true;
556 else
557 return false;
558 }
559
560 return true;
561 }
562
nbp_state_should_learn(const struct net_bridge_port * p)563 static inline bool nbp_state_should_learn(const struct net_bridge_port *p)
564 {
565 return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING;
566 }
567
br_vlan_valid_id(u16 vid,struct netlink_ext_ack * extack)568 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack)
569 {
570 bool ret = vid > 0 && vid < VLAN_VID_MASK;
571
572 if (!ret)
573 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid");
574
575 return ret;
576 }
577
br_vlan_valid_range(const struct bridge_vlan_info * cur,const struct bridge_vlan_info * last,struct netlink_ext_ack * extack)578 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur,
579 const struct bridge_vlan_info *last,
580 struct netlink_ext_ack *extack)
581 {
582 /* pvid flag is not allowed in ranges */
583 if (cur->flags & BRIDGE_VLAN_INFO_PVID) {
584 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range");
585 return false;
586 }
587
588 /* when cur is the range end, check if:
589 * - it has range start flag
590 * - range ids are invalid (end is equal to or before start)
591 */
592 if (last) {
593 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
594 NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one");
595 return false;
596 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) {
597 NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing");
598 return false;
599 } else if (cur->vid <= last->vid) {
600 NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id");
601 return false;
602 }
603 }
604
605 /* check for required range flags */
606 if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN |
607 BRIDGE_VLAN_INFO_RANGE_END))) {
608 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing");
609 return false;
610 }
611
612 return true;
613 }
614
br_afspec_cmd_to_rtm(int cmd)615 static inline int br_afspec_cmd_to_rtm(int cmd)
616 {
617 switch (cmd) {
618 case RTM_SETLINK:
619 return RTM_NEWVLAN;
620 case RTM_DELLINK:
621 return RTM_DELVLAN;
622 }
623
624 return 0;
625 }
626
br_opt_get(const struct net_bridge * br,enum net_bridge_opts opt)627 static inline int br_opt_get(const struct net_bridge *br,
628 enum net_bridge_opts opt)
629 {
630 return test_bit(opt, &br->options);
631 }
632
633 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
634 struct netlink_ext_ack *extack);
635 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt);
636 int br_boolopt_multi_toggle(struct net_bridge *br,
637 struct br_boolopt_multi *bm,
638 struct netlink_ext_ack *extack);
639 void br_boolopt_multi_get(const struct net_bridge *br,
640 struct br_boolopt_multi *bm);
641 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on);
642
643 /* br_device.c */
644 void br_dev_setup(struct net_device *dev);
645 void br_dev_delete(struct net_device *dev, struct list_head *list);
646 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
647 #ifdef CONFIG_NET_POLL_CONTROLLER
br_netpoll_send_skb(const struct net_bridge_port * p,struct sk_buff * skb)648 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
649 struct sk_buff *skb)
650 {
651 netpoll_send_skb(p->np, skb);
652 }
653
654 int br_netpoll_enable(struct net_bridge_port *p);
655 void br_netpoll_disable(struct net_bridge_port *p);
656 #else
br_netpoll_send_skb(const struct net_bridge_port * p,struct sk_buff * skb)657 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
658 struct sk_buff *skb)
659 {
660 }
661
br_netpoll_enable(struct net_bridge_port * p)662 static inline int br_netpoll_enable(struct net_bridge_port *p)
663 {
664 return 0;
665 }
666
br_netpoll_disable(struct net_bridge_port * p)667 static inline void br_netpoll_disable(struct net_bridge_port *p)
668 {
669 }
670 #endif
671
672 /* br_fdb.c */
673 int br_fdb_init(void);
674 void br_fdb_fini(void);
675 int br_fdb_hash_init(struct net_bridge *br);
676 void br_fdb_hash_fini(struct net_bridge *br);
677 void br_fdb_flush(struct net_bridge *br);
678 void br_fdb_find_delete_local(struct net_bridge *br,
679 const struct net_bridge_port *p,
680 const unsigned char *addr, u16 vid);
681 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
682 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
683 void br_fdb_cleanup(struct work_struct *work);
684 void br_fdb_delete_by_port(struct net_bridge *br,
685 const struct net_bridge_port *p, u16 vid, int do_all);
686 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br,
687 const unsigned char *addr,
688 __u16 vid);
689 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
690 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
691 unsigned long off);
692 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
693 const unsigned char *addr, u16 vid);
694 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
695 const unsigned char *addr, u16 vid, unsigned long flags);
696
697 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
698 struct net_device *dev, const unsigned char *addr, u16 vid);
699 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
700 const unsigned char *addr, u16 vid, u16 nlh_flags,
701 struct netlink_ext_ack *extack);
702 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
703 struct net_device *dev, struct net_device *fdev, int *idx);
704 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev,
705 const unsigned char *addr, u16 vid, u32 portid, u32 seq,
706 struct netlink_ext_ack *extack);
707 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
708 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
709 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
710 const unsigned char *addr, u16 vid,
711 bool swdev_notify);
712 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
713 const unsigned char *addr, u16 vid,
714 bool swdev_notify);
715 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p,
716 const unsigned char *addr, u16 vid, bool offloaded);
717
718 /* br_forward.c */
719 enum br_pkt_type {
720 BR_PKT_UNICAST,
721 BR_PKT_MULTICAST,
722 BR_PKT_BROADCAST
723 };
724 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
725 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
726 bool local_rcv, bool local_orig);
727 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
728 void br_flood(struct net_bridge *br, struct sk_buff *skb,
729 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig);
730
731 /* return true if both source port and dest port are isolated */
br_skb_isolated(const struct net_bridge_port * to,const struct sk_buff * skb)732 static inline bool br_skb_isolated(const struct net_bridge_port *to,
733 const struct sk_buff *skb)
734 {
735 return BR_INPUT_SKB_CB(skb)->src_port_isolated &&
736 (to->flags & BR_ISOLATED);
737 }
738
739 /* br_if.c */
740 void br_port_carrier_check(struct net_bridge_port *p, bool *notified);
741 int br_add_bridge(struct net *net, const char *name);
742 int br_del_bridge(struct net *net, const char *name);
743 int br_add_if(struct net_bridge *br, struct net_device *dev,
744 struct netlink_ext_ack *extack);
745 int br_del_if(struct net_bridge *br, struct net_device *dev);
746 void br_mtu_auto_adjust(struct net_bridge *br);
747 netdev_features_t br_features_recompute(struct net_bridge *br,
748 netdev_features_t features);
749 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
750 void br_manage_promisc(struct net_bridge *br);
751 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev);
752
753 /* br_input.c */
754 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
755 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev);
756
757 struct br_frame_type {
758 __be16 type;
759 int (*frame_handler)(struct net_bridge_port *port,
760 struct sk_buff *skb);
761 struct hlist_node list;
762 };
763
764 void br_add_frame(struct net_bridge *br, struct br_frame_type *ft);
765 void br_del_frame(struct net_bridge *br, struct br_frame_type *ft);
766
br_rx_handler_check_rcu(const struct net_device * dev)767 static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
768 {
769 return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev);
770 }
771
br_rx_handler_check_rtnl(const struct net_device * dev)772 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev)
773 {
774 return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev);
775 }
776
br_port_get_check_rcu(const struct net_device * dev)777 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
778 {
779 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
780 }
781
782 static inline struct net_bridge_port *
br_port_get_check_rtnl(const struct net_device * dev)783 br_port_get_check_rtnl(const struct net_device *dev)
784 {
785 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL;
786 }
787
788 /* br_ioctl.c */
789 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
790 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
791 void __user *arg);
792
793 /* br_multicast.c */
794 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
795 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
796 struct sk_buff *skb, u16 vid);
797 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
798 struct sk_buff *skb, u16 vid);
799 int br_multicast_add_port(struct net_bridge_port *port);
800 void br_multicast_del_port(struct net_bridge_port *port);
801 void br_multicast_enable_port(struct net_bridge_port *port);
802 void br_multicast_disable_port(struct net_bridge_port *port);
803 void br_multicast_init(struct net_bridge *br);
804 void br_multicast_join_snoopers(struct net_bridge *br);
805 void br_multicast_leave_snoopers(struct net_bridge *br);
806 void br_multicast_open(struct net_bridge *br);
807 void br_multicast_stop(struct net_bridge *br);
808 void br_multicast_dev_del(struct net_bridge *br);
809 void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
810 struct sk_buff *skb, bool local_rcv, bool local_orig);
811 int br_multicast_set_router(struct net_bridge *br, unsigned long val);
812 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
813 int br_multicast_toggle(struct net_bridge *br, unsigned long val,
814 struct netlink_ext_ack *extack);
815 int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
816 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
817 int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val);
818 #if IS_ENABLED(CONFIG_IPV6)
819 int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val);
820 #endif
821 struct net_bridge_mdb_entry *
822 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst);
823 struct net_bridge_mdb_entry *
824 br_multicast_new_group(struct net_bridge *br, struct br_ip *group);
825 struct net_bridge_port_group *
826 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
827 struct net_bridge_port_group __rcu *next,
828 unsigned char flags, const unsigned char *src,
829 u8 filter_mode, u8 rt_protocol);
830 int br_mdb_hash_init(struct net_bridge *br);
831 void br_mdb_hash_fini(struct net_bridge *br);
832 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp,
833 struct net_bridge_port_group *pg, int type);
834 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
835 int type);
836 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp,
837 struct net_bridge_port_group *pg,
838 struct net_bridge_port_group __rcu **pp);
839 void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p,
840 const struct sk_buff *skb, u8 type, u8 dir);
841 int br_multicast_init_stats(struct net_bridge *br);
842 void br_multicast_uninit_stats(struct net_bridge *br);
843 void br_multicast_get_stats(const struct net_bridge *br,
844 const struct net_bridge_port *p,
845 struct br_mcast_stats *dest);
846 void br_mdb_init(void);
847 void br_mdb_uninit(void);
848 void br_multicast_host_join(struct net_bridge_mdb_entry *mp, bool notify);
849 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify);
850 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg,
851 u8 filter_mode);
852 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp,
853 struct net_bridge_port_group *sg);
854 struct net_bridge_group_src *
855 br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip);
856 void br_multicast_del_group_src(struct net_bridge_group_src *src,
857 bool fastleave);
858
br_group_is_l2(const struct br_ip * group)859 static inline bool br_group_is_l2(const struct br_ip *group)
860 {
861 return group->proto == 0;
862 }
863
864 #define mlock_dereference(X, br) \
865 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
866
br_multicast_is_router(struct net_bridge * br)867 static inline bool br_multicast_is_router(struct net_bridge *br)
868 {
869 return br->multicast_router == 2 ||
870 (br->multicast_router == 1 &&
871 timer_pending(&br->multicast_router_timer));
872 }
873
874 static inline bool
__br_multicast_querier_exists(struct net_bridge * br,struct bridge_mcast_other_query * querier,const bool is_ipv6)875 __br_multicast_querier_exists(struct net_bridge *br,
876 struct bridge_mcast_other_query *querier,
877 const bool is_ipv6)
878 {
879 bool own_querier_enabled;
880
881 if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) {
882 if (is_ipv6 && !br_opt_get(br, BROPT_HAS_IPV6_ADDR))
883 own_querier_enabled = false;
884 else
885 own_querier_enabled = true;
886 } else {
887 own_querier_enabled = false;
888 }
889
890 return time_is_before_jiffies(querier->delay_time) &&
891 (own_querier_enabled || timer_pending(&querier->timer));
892 }
893
br_multicast_querier_exists(struct net_bridge * br,struct ethhdr * eth,const struct net_bridge_mdb_entry * mdb)894 static inline bool br_multicast_querier_exists(struct net_bridge *br,
895 struct ethhdr *eth,
896 const struct net_bridge_mdb_entry *mdb)
897 {
898 switch (eth->h_proto) {
899 case (htons(ETH_P_IP)):
900 return __br_multicast_querier_exists(br,
901 &br->ip4_other_query, false);
902 #if IS_ENABLED(CONFIG_IPV6)
903 case (htons(ETH_P_IPV6)):
904 return __br_multicast_querier_exists(br,
905 &br->ip6_other_query, true);
906 #endif
907 default:
908 return !!mdb && br_group_is_l2(&mdb->addr);
909 }
910 }
911
br_multicast_is_star_g(const struct br_ip * ip)912 static inline bool br_multicast_is_star_g(const struct br_ip *ip)
913 {
914 switch (ip->proto) {
915 case htons(ETH_P_IP):
916 return ipv4_is_zeronet(ip->src.ip4);
917 #if IS_ENABLED(CONFIG_IPV6)
918 case htons(ETH_P_IPV6):
919 return ipv6_addr_any(&ip->src.ip6);
920 #endif
921 default:
922 return false;
923 }
924 }
925
br_multicast_should_handle_mode(const struct net_bridge * br,__be16 proto)926 static inline bool br_multicast_should_handle_mode(const struct net_bridge *br,
927 __be16 proto)
928 {
929 switch (proto) {
930 case htons(ETH_P_IP):
931 return !!(br->multicast_igmp_version == 3);
932 #if IS_ENABLED(CONFIG_IPV6)
933 case htons(ETH_P_IPV6):
934 return !!(br->multicast_mld_version == 2);
935 #endif
936 default:
937 return false;
938 }
939 }
940
br_multicast_igmp_type(const struct sk_buff * skb)941 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
942 {
943 return BR_INPUT_SKB_CB(skb)->igmp;
944 }
945
br_multicast_lmqt(const struct net_bridge * br)946 static inline unsigned long br_multicast_lmqt(const struct net_bridge *br)
947 {
948 return br->multicast_last_member_interval *
949 br->multicast_last_member_count;
950 }
951
br_multicast_gmi(const struct net_bridge * br)952 static inline unsigned long br_multicast_gmi(const struct net_bridge *br)
953 {
954 /* use the RFC default of 2 for QRV */
955 return 2 * br->multicast_query_interval +
956 br->multicast_query_response_interval;
957 }
958 #else
br_multicast_rcv(struct net_bridge * br,struct net_bridge_port * port,struct sk_buff * skb,u16 vid)959 static inline int br_multicast_rcv(struct net_bridge *br,
960 struct net_bridge_port *port,
961 struct sk_buff *skb,
962 u16 vid)
963 {
964 return 0;
965 }
966
br_mdb_get(struct net_bridge * br,struct sk_buff * skb,u16 vid)967 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
968 struct sk_buff *skb, u16 vid)
969 {
970 return NULL;
971 }
972
br_multicast_add_port(struct net_bridge_port * port)973 static inline int br_multicast_add_port(struct net_bridge_port *port)
974 {
975 return 0;
976 }
977
br_multicast_del_port(struct net_bridge_port * port)978 static inline void br_multicast_del_port(struct net_bridge_port *port)
979 {
980 }
981
br_multicast_enable_port(struct net_bridge_port * port)982 static inline void br_multicast_enable_port(struct net_bridge_port *port)
983 {
984 }
985
br_multicast_disable_port(struct net_bridge_port * port)986 static inline void br_multicast_disable_port(struct net_bridge_port *port)
987 {
988 }
989
br_multicast_init(struct net_bridge * br)990 static inline void br_multicast_init(struct net_bridge *br)
991 {
992 }
993
br_multicast_join_snoopers(struct net_bridge * br)994 static inline void br_multicast_join_snoopers(struct net_bridge *br)
995 {
996 }
997
br_multicast_leave_snoopers(struct net_bridge * br)998 static inline void br_multicast_leave_snoopers(struct net_bridge *br)
999 {
1000 }
1001
br_multicast_open(struct net_bridge * br)1002 static inline void br_multicast_open(struct net_bridge *br)
1003 {
1004 }
1005
br_multicast_stop(struct net_bridge * br)1006 static inline void br_multicast_stop(struct net_bridge *br)
1007 {
1008 }
1009
br_multicast_dev_del(struct net_bridge * br)1010 static inline void br_multicast_dev_del(struct net_bridge *br)
1011 {
1012 }
1013
br_multicast_flood(struct net_bridge_mdb_entry * mdst,struct sk_buff * skb,bool local_rcv,bool local_orig)1014 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
1015 struct sk_buff *skb,
1016 bool local_rcv, bool local_orig)
1017 {
1018 }
1019
br_multicast_is_router(struct net_bridge * br)1020 static inline bool br_multicast_is_router(struct net_bridge *br)
1021 {
1022 return false;
1023 }
1024
br_multicast_querier_exists(struct net_bridge * br,struct ethhdr * eth,const struct net_bridge_mdb_entry * mdb)1025 static inline bool br_multicast_querier_exists(struct net_bridge *br,
1026 struct ethhdr *eth,
1027 const struct net_bridge_mdb_entry *mdb)
1028 {
1029 return false;
1030 }
1031
br_mdb_init(void)1032 static inline void br_mdb_init(void)
1033 {
1034 }
1035
br_mdb_uninit(void)1036 static inline void br_mdb_uninit(void)
1037 {
1038 }
1039
br_mdb_hash_init(struct net_bridge * br)1040 static inline int br_mdb_hash_init(struct net_bridge *br)
1041 {
1042 return 0;
1043 }
1044
br_mdb_hash_fini(struct net_bridge * br)1045 static inline void br_mdb_hash_fini(struct net_bridge *br)
1046 {
1047 }
1048
br_multicast_count(struct net_bridge * br,const struct net_bridge_port * p,const struct sk_buff * skb,u8 type,u8 dir)1049 static inline void br_multicast_count(struct net_bridge *br,
1050 const struct net_bridge_port *p,
1051 const struct sk_buff *skb,
1052 u8 type, u8 dir)
1053 {
1054 }
1055
br_multicast_init_stats(struct net_bridge * br)1056 static inline int br_multicast_init_stats(struct net_bridge *br)
1057 {
1058 return 0;
1059 }
1060
br_multicast_uninit_stats(struct net_bridge * br)1061 static inline void br_multicast_uninit_stats(struct net_bridge *br)
1062 {
1063 }
1064
br_multicast_igmp_type(const struct sk_buff * skb)1065 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
1066 {
1067 return 0;
1068 }
1069 #endif
1070
1071 /* br_vlan.c */
1072 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1073 bool br_allowed_ingress(const struct net_bridge *br,
1074 struct net_bridge_vlan_group *vg, struct sk_buff *skb,
1075 u16 *vid, u8 *state);
1076 bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1077 const struct sk_buff *skb);
1078 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
1079 struct sk_buff *br_handle_vlan(struct net_bridge *br,
1080 const struct net_bridge_port *port,
1081 struct net_bridge_vlan_group *vg,
1082 struct sk_buff *skb);
1083 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1084 bool *changed, struct netlink_ext_ack *extack);
1085 int br_vlan_delete(struct net_bridge *br, u16 vid);
1086 void br_vlan_flush(struct net_bridge *br);
1087 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
1088 void br_recalculate_fwd_mask(struct net_bridge *br);
1089 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val,
1090 struct netlink_ext_ack *extack);
1091 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto,
1092 struct netlink_ext_ack *extack);
1093 int br_vlan_set_proto(struct net_bridge *br, unsigned long val,
1094 struct netlink_ext_ack *extack);
1095 int br_vlan_set_stats(struct net_bridge *br, unsigned long val);
1096 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val);
1097 int br_vlan_init(struct net_bridge *br);
1098 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val,
1099 struct netlink_ext_ack *extack);
1100 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid,
1101 struct netlink_ext_ack *extack);
1102 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1103 bool *changed, struct netlink_ext_ack *extack);
1104 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
1105 void nbp_vlan_flush(struct net_bridge_port *port);
1106 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack);
1107 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
1108 void br_vlan_get_stats(const struct net_bridge_vlan *v,
1109 struct pcpu_sw_netstats *stats);
1110 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event);
1111 int br_vlan_bridge_event(struct net_device *dev, unsigned long event,
1112 void *ptr);
1113 void br_vlan_rtnl_init(void);
1114 void br_vlan_rtnl_uninit(void);
1115 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 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1120 const struct net_bridge_vlan *range_end);
1121
1122 void br_vlan_fill_forward_path_pvid(struct net_bridge *br,
1123 struct net_device_path_ctx *ctx,
1124 struct net_device_path *path);
1125 int br_vlan_fill_forward_path_mode(struct net_bridge *br,
1126 struct net_bridge_port *dst,
1127 struct net_device_path *path);
1128
br_vlan_group(const struct net_bridge * br)1129 static inline struct net_bridge_vlan_group *br_vlan_group(
1130 const struct net_bridge *br)
1131 {
1132 return rtnl_dereference(br->vlgrp);
1133 }
1134
nbp_vlan_group(const struct net_bridge_port * p)1135 static inline struct net_bridge_vlan_group *nbp_vlan_group(
1136 const struct net_bridge_port *p)
1137 {
1138 return rtnl_dereference(p->vlgrp);
1139 }
1140
br_vlan_group_rcu(const struct net_bridge * br)1141 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1142 const struct net_bridge *br)
1143 {
1144 return rcu_dereference(br->vlgrp);
1145 }
1146
nbp_vlan_group_rcu(const struct net_bridge_port * p)1147 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1148 const struct net_bridge_port *p)
1149 {
1150 return rcu_dereference(p->vlgrp);
1151 }
1152
1153 /* Since bridge now depends on 8021Q module, but the time bridge sees the
1154 * skb, the vlan tag will always be present if the frame was tagged.
1155 */
br_vlan_get_tag(const struct sk_buff * skb,u16 * vid)1156 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
1157 {
1158 int err = 0;
1159
1160 if (skb_vlan_tag_present(skb)) {
1161 *vid = skb_vlan_tag_get_id(skb);
1162 } else {
1163 *vid = 0;
1164 err = -EINVAL;
1165 }
1166
1167 return err;
1168 }
1169
br_get_pvid(const struct net_bridge_vlan_group * vg)1170 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1171 {
1172 if (!vg)
1173 return 0;
1174
1175 smp_rmb();
1176 return vg->pvid;
1177 }
1178
br_vlan_flags(const struct net_bridge_vlan * v,u16 pvid)1179 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid)
1180 {
1181 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags;
1182 }
1183 #else
br_allowed_ingress(const struct net_bridge * br,struct net_bridge_vlan_group * vg,struct sk_buff * skb,u16 * vid,u8 * state)1184 static inline bool br_allowed_ingress(const struct net_bridge *br,
1185 struct net_bridge_vlan_group *vg,
1186 struct sk_buff *skb,
1187 u16 *vid, u8 *state)
1188 {
1189 return true;
1190 }
1191
br_allowed_egress(struct net_bridge_vlan_group * vg,const struct sk_buff * skb)1192 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1193 const struct sk_buff *skb)
1194 {
1195 return true;
1196 }
1197
br_should_learn(struct net_bridge_port * p,struct sk_buff * skb,u16 * vid)1198 static inline bool br_should_learn(struct net_bridge_port *p,
1199 struct sk_buff *skb, u16 *vid)
1200 {
1201 return true;
1202 }
1203
br_handle_vlan(struct net_bridge * br,const struct net_bridge_port * port,struct net_bridge_vlan_group * vg,struct sk_buff * skb)1204 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
1205 const struct net_bridge_port *port,
1206 struct net_bridge_vlan_group *vg,
1207 struct sk_buff *skb)
1208 {
1209 return skb;
1210 }
1211
br_vlan_add(struct net_bridge * br,u16 vid,u16 flags,bool * changed,struct netlink_ext_ack * extack)1212 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1213 bool *changed, struct netlink_ext_ack *extack)
1214 {
1215 *changed = false;
1216 return -EOPNOTSUPP;
1217 }
1218
br_vlan_delete(struct net_bridge * br,u16 vid)1219 static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
1220 {
1221 return -EOPNOTSUPP;
1222 }
1223
br_vlan_flush(struct net_bridge * br)1224 static inline void br_vlan_flush(struct net_bridge *br)
1225 {
1226 }
1227
br_recalculate_fwd_mask(struct net_bridge * br)1228 static inline void br_recalculate_fwd_mask(struct net_bridge *br)
1229 {
1230 }
1231
br_vlan_init(struct net_bridge * br)1232 static inline int br_vlan_init(struct net_bridge *br)
1233 {
1234 return 0;
1235 }
1236
nbp_vlan_add(struct net_bridge_port * port,u16 vid,u16 flags,bool * changed,struct netlink_ext_ack * extack)1237 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1238 bool *changed, struct netlink_ext_ack *extack)
1239 {
1240 *changed = false;
1241 return -EOPNOTSUPP;
1242 }
1243
nbp_vlan_delete(struct net_bridge_port * port,u16 vid)1244 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
1245 {
1246 return -EOPNOTSUPP;
1247 }
1248
nbp_vlan_flush(struct net_bridge_port * port)1249 static inline void nbp_vlan_flush(struct net_bridge_port *port)
1250 {
1251 }
1252
br_vlan_find(struct net_bridge_vlan_group * vg,u16 vid)1253 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
1254 u16 vid)
1255 {
1256 return NULL;
1257 }
1258
nbp_vlan_init(struct net_bridge_port * port,struct netlink_ext_ack * extack)1259 static inline int nbp_vlan_init(struct net_bridge_port *port,
1260 struct netlink_ext_ack *extack)
1261 {
1262 return 0;
1263 }
1264
br_vlan_get_tag(const struct sk_buff * skb,u16 * tag)1265 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
1266 {
1267 return 0;
1268 }
1269
br_get_pvid(const struct net_bridge_vlan_group * vg)1270 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1271 {
1272 return 0;
1273 }
1274
br_vlan_filter_toggle(struct net_bridge * br,unsigned long val,struct netlink_ext_ack * extack)1275 static inline int br_vlan_filter_toggle(struct net_bridge *br,
1276 unsigned long val,
1277 struct netlink_ext_ack *extack)
1278 {
1279 return -EOPNOTSUPP;
1280 }
1281
nbp_get_num_vlan_infos(struct net_bridge_port * p,u32 filter_mask)1282 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
1283 u32 filter_mask)
1284 {
1285 return 0;
1286 }
1287
br_vlan_fill_forward_path_pvid(struct net_bridge * br,struct net_device_path_ctx * ctx,struct net_device_path * path)1288 static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br,
1289 struct net_device_path_ctx *ctx,
1290 struct net_device_path *path)
1291 {
1292 }
1293
br_vlan_fill_forward_path_mode(struct net_bridge * br,struct net_bridge_port * dst,struct net_device_path * path)1294 static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br,
1295 struct net_bridge_port *dst,
1296 struct net_device_path *path)
1297 {
1298 return 0;
1299 }
1300
br_vlan_group(const struct net_bridge * br)1301 static inline struct net_bridge_vlan_group *br_vlan_group(
1302 const struct net_bridge *br)
1303 {
1304 return NULL;
1305 }
1306
nbp_vlan_group(const struct net_bridge_port * p)1307 static inline struct net_bridge_vlan_group *nbp_vlan_group(
1308 const struct net_bridge_port *p)
1309 {
1310 return NULL;
1311 }
1312
br_vlan_group_rcu(const struct net_bridge * br)1313 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1314 const struct net_bridge *br)
1315 {
1316 return NULL;
1317 }
1318
nbp_vlan_group_rcu(const struct net_bridge_port * p)1319 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1320 const struct net_bridge_port *p)
1321 {
1322 return NULL;
1323 }
1324
br_vlan_get_stats(const struct net_bridge_vlan * v,struct pcpu_sw_netstats * stats)1325 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v,
1326 struct pcpu_sw_netstats *stats)
1327 {
1328 }
1329
br_vlan_port_event(struct net_bridge_port * p,unsigned long event)1330 static inline void br_vlan_port_event(struct net_bridge_port *p,
1331 unsigned long event)
1332 {
1333 }
1334
br_vlan_bridge_event(struct net_device * dev,unsigned long event,void * ptr)1335 static inline int br_vlan_bridge_event(struct net_device *dev,
1336 unsigned long event, void *ptr)
1337 {
1338 return 0;
1339 }
1340
br_vlan_rtnl_init(void)1341 static inline void br_vlan_rtnl_init(void)
1342 {
1343 }
1344
br_vlan_rtnl_uninit(void)1345 static inline void br_vlan_rtnl_uninit(void)
1346 {
1347 }
1348
br_vlan_notify(const struct net_bridge * br,const struct net_bridge_port * p,u16 vid,u16 vid_range,int cmd)1349 static inline void br_vlan_notify(const struct net_bridge *br,
1350 const struct net_bridge_port *p,
1351 u16 vid, u16 vid_range,
1352 int cmd)
1353 {
1354 }
1355
br_vlan_can_enter_range(const struct net_bridge_vlan * v_curr,const struct net_bridge_vlan * range_end)1356 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1357 const struct net_bridge_vlan *range_end)
1358 {
1359 return true;
1360 }
1361 #endif
1362
1363 /* br_vlan_options.c */
1364 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1365 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr,
1366 const struct net_bridge_vlan *range_end);
1367 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v);
1368 size_t br_vlan_opts_nl_size(void);
1369 int br_vlan_process_options(const struct net_bridge *br,
1370 const struct net_bridge_port *p,
1371 struct net_bridge_vlan *range_start,
1372 struct net_bridge_vlan *range_end,
1373 struct nlattr **tb,
1374 struct netlink_ext_ack *extack);
1375
1376 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */
br_vlan_get_state(const struct net_bridge_vlan * v)1377 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v)
1378 {
1379 return READ_ONCE(v->state);
1380 }
1381
br_vlan_set_state(struct net_bridge_vlan * v,u8 state)1382 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state)
1383 {
1384 WRITE_ONCE(v->state, state);
1385 }
1386
br_vlan_get_pvid_state(const struct net_bridge_vlan_group * vg)1387 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg)
1388 {
1389 return READ_ONCE(vg->pvid_state);
1390 }
1391
br_vlan_set_pvid_state(struct net_bridge_vlan_group * vg,u8 state)1392 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg,
1393 u8 state)
1394 {
1395 WRITE_ONCE(vg->pvid_state, state);
1396 }
1397
1398 /* learn_allow is true at ingress and false at egress */
br_vlan_state_allowed(u8 state,bool learn_allow)1399 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow)
1400 {
1401 switch (state) {
1402 case BR_STATE_LEARNING:
1403 return learn_allow;
1404 case BR_STATE_FORWARDING:
1405 return true;
1406 default:
1407 return false;
1408 }
1409 }
1410 #endif
1411
1412 struct nf_br_ops {
1413 int (*br_dev_xmit_hook)(struct sk_buff *skb);
1414 };
1415 extern const struct nf_br_ops __rcu *nf_br_ops;
1416
1417 /* br_netfilter.c */
1418 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1419 int br_nf_core_init(void);
1420 void br_nf_core_fini(void);
1421 void br_netfilter_rtable_init(struct net_bridge *);
1422 #else
br_nf_core_init(void)1423 static inline int br_nf_core_init(void) { return 0; }
br_nf_core_fini(void)1424 static inline void br_nf_core_fini(void) {}
1425 #define br_netfilter_rtable_init(x)
1426 #endif
1427
1428 /* br_stp.c */
1429 void br_set_state(struct net_bridge_port *p, unsigned int state);
1430 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
1431 void br_init_port(struct net_bridge_port *p);
1432 void br_become_designated_port(struct net_bridge_port *p);
1433
1434 void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
1435 int br_set_forward_delay(struct net_bridge *br, unsigned long x);
1436 int br_set_hello_time(struct net_bridge *br, unsigned long x);
1437 int br_set_max_age(struct net_bridge *br, unsigned long x);
1438 int __set_ageing_time(struct net_device *dev, unsigned long t);
1439 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time);
1440
1441
1442 /* br_stp_if.c */
1443 void br_stp_enable_bridge(struct net_bridge *br);
1444 void br_stp_disable_bridge(struct net_bridge *br);
1445 int br_stp_set_enabled(struct net_bridge *br, unsigned long val,
1446 struct netlink_ext_ack *extack);
1447 void br_stp_enable_port(struct net_bridge_port *p);
1448 void br_stp_disable_port(struct net_bridge_port *p);
1449 bool br_stp_recalculate_bridge_id(struct net_bridge *br);
1450 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
1451 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
1452 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
1453 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
1454 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
1455
1456 /* br_stp_bpdu.c */
1457 struct stp_proto;
1458 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
1459 struct net_device *dev);
1460
1461 /* br_stp_timer.c */
1462 void br_stp_timer_init(struct net_bridge *br);
1463 void br_stp_port_timer_init(struct net_bridge_port *p);
1464 unsigned long br_timer_value(const struct timer_list *timer);
1465
1466 /* br.c */
1467 #if IS_ENABLED(CONFIG_ATM_LANE)
1468 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
1469 #endif
1470
1471 /* br_mrp.c */
1472 #if IS_ENABLED(CONFIG_BRIDGE_MRP)
1473 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
1474 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
1475 bool br_mrp_enabled(struct net_bridge *br);
1476 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p);
1477 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br);
1478 #else
br_mrp_parse(struct net_bridge * br,struct net_bridge_port * p,struct nlattr * attr,int cmd,struct netlink_ext_ack * extack)1479 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
1480 struct nlattr *attr, int cmd,
1481 struct netlink_ext_ack *extack)
1482 {
1483 return -EOPNOTSUPP;
1484 }
1485
br_mrp_enabled(struct net_bridge * br)1486 static inline bool br_mrp_enabled(struct net_bridge *br)
1487 {
1488 return false;
1489 }
1490
br_mrp_port_del(struct net_bridge * br,struct net_bridge_port * p)1491 static inline void br_mrp_port_del(struct net_bridge *br,
1492 struct net_bridge_port *p)
1493 {
1494 }
1495
br_mrp_fill_info(struct sk_buff * skb,struct net_bridge * br)1496 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br)
1497 {
1498 return 0;
1499 }
1500
1501 #endif
1502
1503 /* br_cfm.c */
1504 #if IS_ENABLED(CONFIG_BRIDGE_CFM)
1505 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
1506 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
1507 bool br_cfm_created(struct net_bridge *br);
1508 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p);
1509 int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br);
1510 int br_cfm_status_fill_info(struct sk_buff *skb,
1511 struct net_bridge *br,
1512 bool getlink);
1513 int br_cfm_mep_count(struct net_bridge *br, u32 *count);
1514 int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count);
1515 #else
br_cfm_parse(struct net_bridge * br,struct net_bridge_port * p,struct nlattr * attr,int cmd,struct netlink_ext_ack * extack)1516 static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
1517 struct nlattr *attr, int cmd,
1518 struct netlink_ext_ack *extack)
1519 {
1520 return -EOPNOTSUPP;
1521 }
1522
br_cfm_created(struct net_bridge * br)1523 static inline bool br_cfm_created(struct net_bridge *br)
1524 {
1525 return false;
1526 }
1527
br_cfm_port_del(struct net_bridge * br,struct net_bridge_port * p)1528 static inline void br_cfm_port_del(struct net_bridge *br,
1529 struct net_bridge_port *p)
1530 {
1531 }
1532
br_cfm_config_fill_info(struct sk_buff * skb,struct net_bridge * br)1533 static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br)
1534 {
1535 return -EOPNOTSUPP;
1536 }
1537
br_cfm_status_fill_info(struct sk_buff * skb,struct net_bridge * br,bool getlink)1538 static inline int br_cfm_status_fill_info(struct sk_buff *skb,
1539 struct net_bridge *br,
1540 bool getlink)
1541 {
1542 return -EOPNOTSUPP;
1543 }
1544
br_cfm_mep_count(struct net_bridge * br,u32 * count)1545 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count)
1546 {
1547 return -EOPNOTSUPP;
1548 }
1549
br_cfm_peer_mep_count(struct net_bridge * br,u32 * count)1550 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count)
1551 {
1552 return -EOPNOTSUPP;
1553 }
1554 #endif
1555
1556 /* br_netlink.c */
1557 extern struct rtnl_link_ops br_link_ops;
1558 int br_netlink_init(void);
1559 void br_netlink_fini(void);
1560 void br_ifinfo_notify(int event, const struct net_bridge *br,
1561 const struct net_bridge_port *port);
1562 void br_info_notify(int event, const struct net_bridge *br,
1563 const struct net_bridge_port *port, u32 filter);
1564 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags,
1565 struct netlink_ext_ack *extack);
1566 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
1567 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
1568 u32 filter_mask, int nlflags);
1569 int br_process_vlan_info(struct net_bridge *br,
1570 struct net_bridge_port *p, int cmd,
1571 struct bridge_vlan_info *vinfo_curr,
1572 struct bridge_vlan_info **vinfo_last,
1573 bool *changed,
1574 struct netlink_ext_ack *extack);
1575
1576 #ifdef CONFIG_SYSFS
1577 /* br_sysfs_if.c */
1578 extern const struct sysfs_ops brport_sysfs_ops;
1579 int br_sysfs_addif(struct net_bridge_port *p);
1580 int br_sysfs_renameif(struct net_bridge_port *p);
1581
1582 /* br_sysfs_br.c */
1583 int br_sysfs_addbr(struct net_device *dev);
1584 void br_sysfs_delbr(struct net_device *dev);
1585
1586 #else
1587
br_sysfs_addif(struct net_bridge_port * p)1588 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
br_sysfs_renameif(struct net_bridge_port * p)1589 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
br_sysfs_addbr(struct net_device * dev)1590 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
br_sysfs_delbr(struct net_device * dev)1591 static inline void br_sysfs_delbr(struct net_device *dev) { return; }
1592 #endif /* CONFIG_SYSFS */
1593
1594 /* br_switchdev.c */
1595 #ifdef CONFIG_NET_SWITCHDEV
1596 int nbp_switchdev_mark_set(struct net_bridge_port *p);
1597 void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1598 struct sk_buff *skb);
1599 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1600 const struct sk_buff *skb);
1601 int br_switchdev_set_port_flag(struct net_bridge_port *p,
1602 unsigned long flags,
1603 unsigned long mask,
1604 struct netlink_ext_ack *extack);
1605 void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb,
1606 int type);
1607 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags,
1608 struct netlink_ext_ack *extack);
1609 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid);
1610
br_switchdev_frame_unmark(struct sk_buff * skb)1611 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1612 {
1613 skb->offload_fwd_mark = 0;
1614 }
1615 #else
nbp_switchdev_mark_set(struct net_bridge_port * p)1616 static inline int nbp_switchdev_mark_set(struct net_bridge_port *p)
1617 {
1618 return 0;
1619 }
1620
nbp_switchdev_frame_mark(const struct net_bridge_port * p,struct sk_buff * skb)1621 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1622 struct sk_buff *skb)
1623 {
1624 }
1625
nbp_switchdev_allowed_egress(const struct net_bridge_port * p,const struct sk_buff * skb)1626 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1627 const struct sk_buff *skb)
1628 {
1629 return true;
1630 }
1631
br_switchdev_set_port_flag(struct net_bridge_port * p,unsigned long flags,unsigned long mask,struct netlink_ext_ack * extack)1632 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p,
1633 unsigned long flags,
1634 unsigned long mask,
1635 struct netlink_ext_ack *extack)
1636 {
1637 return 0;
1638 }
1639
br_switchdev_port_vlan_add(struct net_device * dev,u16 vid,u16 flags,struct netlink_ext_ack * extack)1640 static inline int br_switchdev_port_vlan_add(struct net_device *dev,
1641 u16 vid, u16 flags,
1642 struct netlink_ext_ack *extack)
1643 {
1644 return -EOPNOTSUPP;
1645 }
1646
br_switchdev_port_vlan_del(struct net_device * dev,u16 vid)1647 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid)
1648 {
1649 return -EOPNOTSUPP;
1650 }
1651
1652 static inline void
br_switchdev_fdb_notify(const struct net_bridge_fdb_entry * fdb,int type)1653 br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type)
1654 {
1655 }
1656
br_switchdev_frame_unmark(struct sk_buff * skb)1657 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1658 {
1659 }
1660 #endif /* CONFIG_NET_SWITCHDEV */
1661
1662 /* br_arp_nd_proxy.c */
1663 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br);
1664 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br,
1665 u16 vid, struct net_bridge_port *p);
1666 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br,
1667 u16 vid, struct net_bridge_port *p, struct nd_msg *msg);
1668 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m);
1669 #endif
1670