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1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  *	Linux ethernet bridge
4  *
5  *	Authors:
6  *	Lennert Buytenhek		<buytenh@gnu.org>
7  */
8 
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 #define BR_MULTICAST_QUERY_INTVL_MIN msecs_to_jiffies(1000)
32 #define BR_MULTICAST_STARTUP_QUERY_INTVL_MIN BR_MULTICAST_QUERY_INTVL_MIN
33 
34 #define BR_HWDOM_MAX BITS_PER_LONG
35 
36 #define BR_VERSION	"2.3"
37 
38 /* Control of forwarding link local multicast */
39 #define BR_GROUPFWD_DEFAULT	0
40 /* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */
41 enum {
42 	BR_GROUPFWD_STP		= BIT(0),
43 	BR_GROUPFWD_MACPAUSE	= BIT(1),
44 	BR_GROUPFWD_LACP	= BIT(2),
45 };
46 
47 #define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \
48 				BR_GROUPFWD_LACP)
49 /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
50 #define BR_GROUPFWD_8021AD	0xB801u
51 
52 /* Path to usermode spanning tree program */
53 #define BR_STP_PROG	"/sbin/bridge-stp"
54 
55 #define BR_FDB_NOTIFY_SETTABLE_BITS (FDB_NOTIFY_BIT | FDB_NOTIFY_INACTIVE_BIT)
56 
57 typedef struct bridge_id bridge_id;
58 typedef struct mac_addr mac_addr;
59 typedef __u16 port_id;
60 
61 struct bridge_id {
62 	unsigned char	prio[2];
63 	unsigned char	addr[ETH_ALEN];
64 };
65 
66 struct mac_addr {
67 	unsigned char	addr[ETH_ALEN];
68 };
69 
70 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
71 /* our own querier */
72 struct bridge_mcast_own_query {
73 	struct timer_list	timer;
74 	u32			startup_sent;
75 };
76 
77 /* other querier */
78 struct bridge_mcast_other_query {
79 	struct timer_list		timer;
80 	struct timer_list		delay_timer;
81 };
82 
83 /* selected querier */
84 struct bridge_mcast_querier {
85 	struct br_ip addr;
86 	int port_ifidx;
87 	seqcount_spinlock_t seq;
88 };
89 
90 /* IGMP/MLD statistics */
91 struct bridge_mcast_stats {
92 	struct br_mcast_stats mstats;
93 	struct u64_stats_sync syncp;
94 };
95 #endif
96 
97 /* net_bridge_mcast_port must be always defined due to forwarding stubs */
98 struct net_bridge_mcast_port {
99 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
100 	struct net_bridge_port		*port;
101 	struct net_bridge_vlan		*vlan;
102 
103 	struct bridge_mcast_own_query	ip4_own_query;
104 	struct timer_list		ip4_mc_router_timer;
105 	struct hlist_node		ip4_rlist;
106 #if IS_ENABLED(CONFIG_IPV6)
107 	struct bridge_mcast_own_query	ip6_own_query;
108 	struct timer_list		ip6_mc_router_timer;
109 	struct hlist_node		ip6_rlist;
110 #endif /* IS_ENABLED(CONFIG_IPV6) */
111 	unsigned char			multicast_router;
112 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */
113 };
114 
115 /* net_bridge_mcast must be always defined due to forwarding stubs */
116 struct net_bridge_mcast {
117 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
118 	struct net_bridge		*br;
119 	struct net_bridge_vlan		*vlan;
120 
121 	u32				multicast_last_member_count;
122 	u32				multicast_startup_query_count;
123 
124 	u8				multicast_querier;
125 	u8				multicast_igmp_version;
126 	u8				multicast_router;
127 #if IS_ENABLED(CONFIG_IPV6)
128 	u8				multicast_mld_version;
129 #endif
130 	unsigned long			multicast_last_member_interval;
131 	unsigned long			multicast_membership_interval;
132 	unsigned long			multicast_querier_interval;
133 	unsigned long			multicast_query_interval;
134 	unsigned long			multicast_query_response_interval;
135 	unsigned long			multicast_startup_query_interval;
136 	struct hlist_head		ip4_mc_router_list;
137 	struct timer_list		ip4_mc_router_timer;
138 	struct bridge_mcast_other_query	ip4_other_query;
139 	struct bridge_mcast_own_query	ip4_own_query;
140 	struct bridge_mcast_querier	ip4_querier;
141 #if IS_ENABLED(CONFIG_IPV6)
142 	struct hlist_head		ip6_mc_router_list;
143 	struct timer_list		ip6_mc_router_timer;
144 	struct bridge_mcast_other_query	ip6_other_query;
145 	struct bridge_mcast_own_query	ip6_own_query;
146 	struct bridge_mcast_querier	ip6_querier;
147 #endif /* IS_ENABLED(CONFIG_IPV6) */
148 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */
149 };
150 
151 struct br_tunnel_info {
152 	__be64				tunnel_id;
153 	struct metadata_dst __rcu	*tunnel_dst;
154 };
155 
156 /* private vlan flags */
157 enum {
158 	BR_VLFLAG_PER_PORT_STATS = BIT(0),
159 	BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1),
160 	BR_VLFLAG_MCAST_ENABLED = BIT(2),
161 	BR_VLFLAG_GLOBAL_MCAST_ENABLED = BIT(3),
162 };
163 
164 /**
165  * struct net_bridge_vlan - per-vlan entry
166  *
167  * @vnode: rhashtable member
168  * @vid: VLAN id
169  * @flags: bridge vlan flags
170  * @priv_flags: private (in-kernel) bridge vlan flags
171  * @state: STP state (e.g. blocking, learning, forwarding)
172  * @stats: per-cpu VLAN statistics
173  * @br: if MASTER flag set, this points to a bridge struct
174  * @port: if MASTER flag unset, this points to a port struct
175  * @refcnt: if MASTER flag set, this is bumped for each port referencing it
176  * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
177  *          for this VLAN entry
178  * @br_mcast_ctx: if MASTER flag set, this is the global vlan multicast context
179  * @port_mcast_ctx: if MASTER flag unset, this is the per-port/vlan multicast
180  *                  context
181  * @msti: if MASTER flag set, this holds the VLANs MST instance
182  * @vlist: sorted list of VLAN entries
183  * @rcu: used for entry destruction
184  *
185  * This structure is shared between the global per-VLAN entries contained in
186  * the bridge rhashtable and the local per-port per-VLAN entries contained in
187  * the port's rhashtable. The union entries should be interpreted depending on
188  * the entry flags that are set.
189  */
190 struct net_bridge_vlan {
191 	struct rhash_head		vnode;
192 	struct rhash_head		tnode;
193 	u16				vid;
194 	u16				flags;
195 	u16				priv_flags;
196 	u8				state;
197 	struct pcpu_sw_netstats __percpu *stats;
198 	union {
199 		struct net_bridge	*br;
200 		struct net_bridge_port	*port;
201 	};
202 	union {
203 		refcount_t		refcnt;
204 		struct net_bridge_vlan	*brvlan;
205 	};
206 
207 	struct br_tunnel_info		tinfo;
208 
209 	union {
210 		struct net_bridge_mcast		br_mcast_ctx;
211 		struct net_bridge_mcast_port	port_mcast_ctx;
212 	};
213 
214 	u16				msti;
215 
216 	struct list_head		vlist;
217 
218 	struct rcu_head			rcu;
219 };
220 
221 /**
222  * struct net_bridge_vlan_group
223  *
224  * @vlan_hash: VLAN entry rhashtable
225  * @vlan_list: sorted VLAN entry list
226  * @num_vlans: number of total VLAN entries
227  * @pvid: PVID VLAN id
228  * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking)
229  *
230  * IMPORTANT: Be careful when checking if there're VLAN entries using list
231  *            primitives because the bridge can have entries in its list which
232  *            are just for global context but not for filtering, i.e. they have
233  *            the master flag set but not the brentry flag. If you have to check
234  *            if there're "real" entries in the bridge please test @num_vlans
235  */
236 struct net_bridge_vlan_group {
237 	struct rhashtable		vlan_hash;
238 	struct rhashtable		tunnel_hash;
239 	struct list_head		vlan_list;
240 	u16				num_vlans;
241 	u16				pvid;
242 	u8				pvid_state;
243 };
244 
245 /* bridge fdb flags */
246 enum {
247 	BR_FDB_LOCAL,
248 	BR_FDB_STATIC,
249 	BR_FDB_STICKY,
250 	BR_FDB_ADDED_BY_USER,
251 	BR_FDB_ADDED_BY_EXT_LEARN,
252 	BR_FDB_OFFLOADED,
253 	BR_FDB_NOTIFY,
254 	BR_FDB_NOTIFY_INACTIVE
255 };
256 
257 struct net_bridge_fdb_key {
258 	mac_addr addr;
259 	u16 vlan_id;
260 };
261 
262 struct net_bridge_fdb_entry {
263 	struct rhash_head		rhnode;
264 	struct net_bridge_port		*dst;
265 
266 	struct net_bridge_fdb_key	key;
267 	struct hlist_node		fdb_node;
268 	unsigned long			flags;
269 
270 	/* write-heavy members should not affect lookups */
271 	unsigned long			updated ____cacheline_aligned_in_smp;
272 	unsigned long			used;
273 
274 	struct rcu_head			rcu;
275 };
276 
277 struct net_bridge_fdb_flush_desc {
278 	unsigned long			flags;
279 	unsigned long			flags_mask;
280 	int				port_ifindex;
281 	u16				vlan_id;
282 };
283 
284 #define MDB_PG_FLAGS_PERMANENT	BIT(0)
285 #define MDB_PG_FLAGS_OFFLOAD	BIT(1)
286 #define MDB_PG_FLAGS_FAST_LEAVE	BIT(2)
287 #define MDB_PG_FLAGS_STAR_EXCL	BIT(3)
288 #define MDB_PG_FLAGS_BLOCKED	BIT(4)
289 
290 #define PG_SRC_ENT_LIMIT	32
291 
292 #define BR_SGRP_F_DELETE	BIT(0)
293 #define BR_SGRP_F_SEND		BIT(1)
294 #define BR_SGRP_F_INSTALLED	BIT(2)
295 
296 struct net_bridge_mcast_gc {
297 	struct hlist_node		gc_node;
298 	void				(*destroy)(struct net_bridge_mcast_gc *gc);
299 };
300 
301 struct net_bridge_group_src {
302 	struct hlist_node		node;
303 
304 	struct br_ip			addr;
305 	struct net_bridge_port_group	*pg;
306 	u8				flags;
307 	u8				src_query_rexmit_cnt;
308 	struct timer_list		timer;
309 
310 	struct net_bridge		*br;
311 	struct net_bridge_mcast_gc	mcast_gc;
312 	struct rcu_head			rcu;
313 };
314 
315 struct net_bridge_port_group_sg_key {
316 	struct net_bridge_port		*port;
317 	struct br_ip			addr;
318 };
319 
320 struct net_bridge_port_group {
321 	struct net_bridge_port_group __rcu *next;
322 	struct net_bridge_port_group_sg_key key;
323 	unsigned char			eth_addr[ETH_ALEN] __aligned(2);
324 	unsigned char			flags;
325 	unsigned char			filter_mode;
326 	unsigned char			grp_query_rexmit_cnt;
327 	unsigned char			rt_protocol;
328 
329 	struct hlist_head		src_list;
330 	unsigned int			src_ents;
331 	struct timer_list		timer;
332 	struct timer_list		rexmit_timer;
333 	struct hlist_node		mglist;
334 	struct rb_root			eht_set_tree;
335 	struct rb_root			eht_host_tree;
336 
337 	struct rhash_head		rhnode;
338 	struct net_bridge_mcast_gc	mcast_gc;
339 	struct rcu_head			rcu;
340 };
341 
342 struct net_bridge_mdb_entry {
343 	struct rhash_head		rhnode;
344 	struct net_bridge		*br;
345 	struct net_bridge_port_group __rcu *ports;
346 	struct br_ip			addr;
347 	bool				host_joined;
348 
349 	struct timer_list		timer;
350 	struct hlist_node		mdb_node;
351 
352 	struct net_bridge_mcast_gc	mcast_gc;
353 	struct rcu_head			rcu;
354 };
355 
356 struct net_bridge_port {
357 	struct net_bridge		*br;
358 	struct net_device		*dev;
359 	netdevice_tracker		dev_tracker;
360 	struct list_head		list;
361 
362 	unsigned long			flags;
363 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
364 	struct net_bridge_vlan_group	__rcu *vlgrp;
365 #endif
366 	struct net_bridge_port		__rcu *backup_port;
367 
368 	/* STP */
369 	u8				priority;
370 	u8				state;
371 	u16				port_no;
372 	unsigned char			topology_change_ack;
373 	unsigned char			config_pending;
374 	port_id				port_id;
375 	port_id				designated_port;
376 	bridge_id			designated_root;
377 	bridge_id			designated_bridge;
378 	u32				path_cost;
379 	u32				designated_cost;
380 	unsigned long			designated_age;
381 
382 	struct timer_list		forward_delay_timer;
383 	struct timer_list		hold_timer;
384 	struct timer_list		message_age_timer;
385 	struct kobject			kobj;
386 	struct rcu_head			rcu;
387 
388 	struct net_bridge_mcast_port	multicast_ctx;
389 
390 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
391 	struct bridge_mcast_stats	__percpu *mcast_stats;
392 
393 	u32				multicast_eht_hosts_limit;
394 	u32				multicast_eht_hosts_cnt;
395 	struct hlist_head		mglist;
396 #endif
397 
398 #ifdef CONFIG_SYSFS
399 	char				sysfs_name[IFNAMSIZ];
400 #endif
401 
402 #ifdef CONFIG_NET_POLL_CONTROLLER
403 	struct netpoll			*np;
404 #endif
405 #ifdef CONFIG_NET_SWITCHDEV
406 	/* Identifier used to group ports that share the same switchdev
407 	 * hardware domain.
408 	 */
409 	int				hwdom;
410 	int				offload_count;
411 	struct netdev_phys_item_id	ppid;
412 #endif
413 	u16				group_fwd_mask;
414 	u16				backup_redirected_cnt;
415 
416 	struct bridge_stp_xstats	stp_xstats;
417 };
418 
419 #define kobj_to_brport(obj)	container_of(obj, struct net_bridge_port, kobj)
420 
421 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
422 #define br_promisc_port(p) ((p)->flags & BR_PROMISC)
423 
br_port_get_rcu(const struct net_device * dev)424 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
425 {
426 	return rcu_dereference(dev->rx_handler_data);
427 }
428 
br_port_get_rtnl(const struct net_device * dev)429 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
430 {
431 	return netif_is_bridge_port(dev) ?
432 		rtnl_dereference(dev->rx_handler_data) : NULL;
433 }
434 
br_port_get_rtnl_rcu(const struct net_device * dev)435 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev)
436 {
437 	return netif_is_bridge_port(dev) ?
438 		rcu_dereference_rtnl(dev->rx_handler_data) : NULL;
439 }
440 
441 enum net_bridge_opts {
442 	BROPT_VLAN_ENABLED,
443 	BROPT_VLAN_STATS_ENABLED,
444 	BROPT_NF_CALL_IPTABLES,
445 	BROPT_NF_CALL_IP6TABLES,
446 	BROPT_NF_CALL_ARPTABLES,
447 	BROPT_GROUP_ADDR_SET,
448 	BROPT_MULTICAST_ENABLED,
449 	BROPT_MULTICAST_QUERY_USE_IFADDR,
450 	BROPT_MULTICAST_STATS_ENABLED,
451 	BROPT_HAS_IPV6_ADDR,
452 	BROPT_NEIGH_SUPPRESS_ENABLED,
453 	BROPT_MTU_SET_BY_USER,
454 	BROPT_VLAN_STATS_PER_PORT,
455 	BROPT_NO_LL_LEARN,
456 	BROPT_VLAN_BRIDGE_BINDING,
457 	BROPT_MCAST_VLAN_SNOOPING_ENABLED,
458 	BROPT_MST_ENABLED,
459 };
460 
461 struct net_bridge {
462 	spinlock_t			lock;
463 	spinlock_t			hash_lock;
464 	struct hlist_head		frame_type_list;
465 	struct net_device		*dev;
466 	unsigned long			options;
467 	/* These fields are accessed on each packet */
468 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
469 	__be16				vlan_proto;
470 	u16				default_pvid;
471 	struct net_bridge_vlan_group	__rcu *vlgrp;
472 #endif
473 
474 	struct rhashtable		fdb_hash_tbl;
475 	struct list_head		port_list;
476 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
477 	union {
478 		struct rtable		fake_rtable;
479 		struct rt6_info		fake_rt6_info;
480 	};
481 #endif
482 	u16				group_fwd_mask;
483 	u16				group_fwd_mask_required;
484 
485 	/* STP */
486 	bridge_id			designated_root;
487 	bridge_id			bridge_id;
488 	unsigned char			topology_change;
489 	unsigned char			topology_change_detected;
490 	u16				root_port;
491 	unsigned long			max_age;
492 	unsigned long			hello_time;
493 	unsigned long			forward_delay;
494 	unsigned long			ageing_time;
495 	unsigned long			bridge_max_age;
496 	unsigned long			bridge_hello_time;
497 	unsigned long			bridge_forward_delay;
498 	unsigned long			bridge_ageing_time;
499 	u32				root_path_cost;
500 
501 	u8				group_addr[ETH_ALEN];
502 
503 	enum {
504 		BR_NO_STP, 		/* no spanning tree */
505 		BR_KERNEL_STP,		/* old STP in kernel */
506 		BR_USER_STP,		/* new RSTP in userspace */
507 	} stp_enabled;
508 
509 	struct net_bridge_mcast		multicast_ctx;
510 
511 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
512 	struct bridge_mcast_stats	__percpu *mcast_stats;
513 
514 	u32				hash_max;
515 
516 	spinlock_t			multicast_lock;
517 
518 	struct rhashtable		mdb_hash_tbl;
519 	struct rhashtable		sg_port_tbl;
520 
521 	struct hlist_head		mcast_gc_list;
522 	struct hlist_head		mdb_list;
523 
524 	struct work_struct		mcast_gc_work;
525 #endif
526 
527 	struct timer_list		hello_timer;
528 	struct timer_list		tcn_timer;
529 	struct timer_list		topology_change_timer;
530 	struct delayed_work		gc_work;
531 	struct kobject			*ifobj;
532 	u32				auto_cnt;
533 
534 #ifdef CONFIG_NET_SWITCHDEV
535 	/* Counter used to make sure that hardware domains get unique
536 	 * identifiers in case a bridge spans multiple switchdev instances.
537 	 */
538 	int				last_hwdom;
539 	/* Bit mask of hardware domain numbers in use */
540 	unsigned long			busy_hwdoms;
541 #endif
542 	struct hlist_head		fdb_list;
543 
544 #if IS_ENABLED(CONFIG_BRIDGE_MRP)
545 	struct hlist_head		mrp_list;
546 #endif
547 #if IS_ENABLED(CONFIG_BRIDGE_CFM)
548 	struct hlist_head		mep_list;
549 #endif
550 };
551 
552 struct br_input_skb_cb {
553 	struct net_device *brdev;
554 
555 	u16 frag_max_size;
556 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
557 	u8 igmp;
558 	u8 mrouters_only:1;
559 #endif
560 	u8 proxyarp_replied:1;
561 	u8 src_port_isolated:1;
562 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
563 	u8 vlan_filtered:1;
564 #endif
565 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
566 	u8 br_netfilter_broute:1;
567 #endif
568 
569 #ifdef CONFIG_NET_SWITCHDEV
570 	/* Set if TX data plane offloading is used towards at least one
571 	 * hardware domain.
572 	 */
573 	u8 tx_fwd_offload:1;
574 	/* The switchdev hardware domain from which this packet was received.
575 	 * If skb->offload_fwd_mark was set, then this packet was already
576 	 * forwarded by hardware to the other ports in the source hardware
577 	 * domain, otherwise it wasn't.
578 	 */
579 	int src_hwdom;
580 	/* Bit mask of hardware domains towards this packet has already been
581 	 * transmitted using the TX data plane offload.
582 	 */
583 	unsigned long fwd_hwdoms;
584 #endif
585 };
586 
587 #define BR_INPUT_SKB_CB(__skb)	((struct br_input_skb_cb *)(__skb)->cb)
588 
589 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
590 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)	(BR_INPUT_SKB_CB(__skb)->mrouters_only)
591 #else
592 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)	(0)
593 #endif
594 
595 #define br_printk(level, br, format, args...)	\
596 	printk(level "%s: " format, (br)->dev->name, ##args)
597 
598 #define br_err(__br, format, args...)			\
599 	br_printk(KERN_ERR, __br, format, ##args)
600 #define br_warn(__br, format, args...)			\
601 	br_printk(KERN_WARNING, __br, format, ##args)
602 #define br_notice(__br, format, args...)		\
603 	br_printk(KERN_NOTICE, __br, format, ##args)
604 #define br_info(__br, format, args...)			\
605 	br_printk(KERN_INFO, __br, format, ##args)
606 
607 #define br_debug(br, format, args...)			\
608 	pr_debug("%s: " format,  (br)->dev->name, ##args)
609 
610 /* called under bridge lock */
br_is_root_bridge(const struct net_bridge * br)611 static inline int br_is_root_bridge(const struct net_bridge *br)
612 {
613 	return !memcmp(&br->bridge_id, &br->designated_root, 8);
614 }
615 
616 /* check if a VLAN entry is global */
br_vlan_is_master(const struct net_bridge_vlan * v)617 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
618 {
619 	return v->flags & BRIDGE_VLAN_INFO_MASTER;
620 }
621 
622 /* check if a VLAN entry is used by the bridge */
br_vlan_is_brentry(const struct net_bridge_vlan * v)623 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
624 {
625 	return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
626 }
627 
628 /* 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)629 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
630 {
631 	if (br_vlan_is_master(v)) {
632 		if (br_vlan_is_brentry(v))
633 			return true;
634 		else
635 			return false;
636 	}
637 
638 	return true;
639 }
640 
nbp_state_should_learn(const struct net_bridge_port * p)641 static inline bool nbp_state_should_learn(const struct net_bridge_port *p)
642 {
643 	return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING;
644 }
645 
br_vlan_valid_id(u16 vid,struct netlink_ext_ack * extack)646 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack)
647 {
648 	bool ret = vid > 0 && vid < VLAN_VID_MASK;
649 
650 	if (!ret)
651 		NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid");
652 
653 	return ret;
654 }
655 
br_vlan_valid_range(const struct bridge_vlan_info * cur,const struct bridge_vlan_info * last,struct netlink_ext_ack * extack)656 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur,
657 				       const struct bridge_vlan_info *last,
658 				       struct netlink_ext_ack *extack)
659 {
660 	/* pvid flag is not allowed in ranges */
661 	if (cur->flags & BRIDGE_VLAN_INFO_PVID) {
662 		NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range");
663 		return false;
664 	}
665 
666 	/* when cur is the range end, check if:
667 	 *  - it has range start flag
668 	 *  - range ids are invalid (end is equal to or before start)
669 	 */
670 	if (last) {
671 		if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
672 			NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one");
673 			return false;
674 		} else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) {
675 			NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing");
676 			return false;
677 		} else if (cur->vid <= last->vid) {
678 			NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id");
679 			return false;
680 		}
681 	}
682 
683 	/* check for required range flags */
684 	if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN |
685 			    BRIDGE_VLAN_INFO_RANGE_END))) {
686 		NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing");
687 		return false;
688 	}
689 
690 	return true;
691 }
692 
br_vlan_multicast_router(const struct net_bridge_vlan * v)693 static inline u8 br_vlan_multicast_router(const struct net_bridge_vlan *v)
694 {
695 	u8 mcast_router = MDB_RTR_TYPE_DISABLED;
696 
697 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
698 	if (!br_vlan_is_master(v))
699 		mcast_router = v->port_mcast_ctx.multicast_router;
700 	else
701 		mcast_router = v->br_mcast_ctx.multicast_router;
702 #endif
703 
704 	return mcast_router;
705 }
706 
br_afspec_cmd_to_rtm(int cmd)707 static inline int br_afspec_cmd_to_rtm(int cmd)
708 {
709 	switch (cmd) {
710 	case RTM_SETLINK:
711 		return RTM_NEWVLAN;
712 	case RTM_DELLINK:
713 		return RTM_DELVLAN;
714 	}
715 
716 	return 0;
717 }
718 
br_opt_get(const struct net_bridge * br,enum net_bridge_opts opt)719 static inline int br_opt_get(const struct net_bridge *br,
720 			     enum net_bridge_opts opt)
721 {
722 	return test_bit(opt, &br->options);
723 }
724 
725 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
726 		      struct netlink_ext_ack *extack);
727 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt);
728 int br_boolopt_multi_toggle(struct net_bridge *br,
729 			    struct br_boolopt_multi *bm,
730 			    struct netlink_ext_ack *extack);
731 void br_boolopt_multi_get(const struct net_bridge *br,
732 			  struct br_boolopt_multi *bm);
733 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on);
734 
735 /* br_device.c */
736 void br_dev_setup(struct net_device *dev);
737 void br_dev_delete(struct net_device *dev, struct list_head *list);
738 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
739 #ifdef CONFIG_NET_POLL_CONTROLLER
br_netpoll_send_skb(const struct net_bridge_port * p,struct sk_buff * skb)740 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
741 				       struct sk_buff *skb)
742 {
743 	netpoll_send_skb(p->np, skb);
744 }
745 
746 int br_netpoll_enable(struct net_bridge_port *p);
747 void br_netpoll_disable(struct net_bridge_port *p);
748 #else
br_netpoll_send_skb(const struct net_bridge_port * p,struct sk_buff * skb)749 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
750 				       struct sk_buff *skb)
751 {
752 }
753 
br_netpoll_enable(struct net_bridge_port * p)754 static inline int br_netpoll_enable(struct net_bridge_port *p)
755 {
756 	return 0;
757 }
758 
br_netpoll_disable(struct net_bridge_port * p)759 static inline void br_netpoll_disable(struct net_bridge_port *p)
760 {
761 }
762 #endif
763 
764 /* br_fdb.c */
765 #define FDB_FLUSH_IGNORED_NDM_FLAGS (NTF_MASTER | NTF_SELF)
766 #define FDB_FLUSH_ALLOWED_NDM_STATES (NUD_PERMANENT | NUD_NOARP)
767 #define FDB_FLUSH_ALLOWED_NDM_FLAGS (NTF_USE | NTF_EXT_LEARNED | \
768 				     NTF_STICKY | NTF_OFFLOADED)
769 
770 int br_fdb_init(void);
771 void br_fdb_fini(void);
772 int br_fdb_hash_init(struct net_bridge *br);
773 void br_fdb_hash_fini(struct net_bridge *br);
774 void br_fdb_flush(struct net_bridge *br,
775 		  const struct net_bridge_fdb_flush_desc *desc);
776 void br_fdb_find_delete_local(struct net_bridge *br,
777 			      const struct net_bridge_port *p,
778 			      const unsigned char *addr, u16 vid);
779 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
780 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
781 void br_fdb_cleanup(struct work_struct *work);
782 void br_fdb_delete_by_port(struct net_bridge *br,
783 			   const struct net_bridge_port *p, u16 vid, int do_all);
784 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br,
785 					     const unsigned char *addr,
786 					     __u16 vid);
787 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
788 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
789 		   unsigned long off);
790 int br_fdb_add_local(struct net_bridge *br, struct net_bridge_port *source,
791 		     const unsigned char *addr, u16 vid);
792 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
793 		   const unsigned char *addr, u16 vid, unsigned long flags);
794 
795 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
796 		  struct net_device *dev, const unsigned char *addr, u16 vid,
797 		  struct netlink_ext_ack *extack);
798 int br_fdb_delete_bulk(struct ndmsg *ndm, struct nlattr *tb[],
799 		       struct net_device *dev, u16 vid,
800 		       struct netlink_ext_ack *extack);
801 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
802 	       const unsigned char *addr, u16 vid, u16 nlh_flags,
803 	       struct netlink_ext_ack *extack);
804 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
805 		struct net_device *dev, struct net_device *fdev, int *idx);
806 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev,
807 	       const unsigned char *addr, u16 vid, u32 portid, u32 seq,
808 	       struct netlink_ext_ack *extack);
809 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
810 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
811 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
812 			      const unsigned char *addr, u16 vid,
813 			      bool swdev_notify);
814 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
815 			      const unsigned char *addr, u16 vid,
816 			      bool swdev_notify);
817 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p,
818 			  const unsigned char *addr, u16 vid, bool offloaded);
819 
820 /* br_forward.c */
821 enum br_pkt_type {
822 	BR_PKT_UNICAST,
823 	BR_PKT_MULTICAST,
824 	BR_PKT_BROADCAST
825 };
826 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
827 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
828 		bool local_rcv, bool local_orig);
829 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
830 void br_flood(struct net_bridge *br, struct sk_buff *skb,
831 	      enum br_pkt_type pkt_type, bool local_rcv, bool local_orig);
832 
833 /* 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)834 static inline bool br_skb_isolated(const struct net_bridge_port *to,
835 				   const struct sk_buff *skb)
836 {
837 	return BR_INPUT_SKB_CB(skb)->src_port_isolated &&
838 	       (to->flags & BR_ISOLATED);
839 }
840 
841 /* br_if.c */
842 void br_port_carrier_check(struct net_bridge_port *p, bool *notified);
843 int br_add_bridge(struct net *net, const char *name);
844 int br_del_bridge(struct net *net, const char *name);
845 int br_add_if(struct net_bridge *br, struct net_device *dev,
846 	      struct netlink_ext_ack *extack);
847 int br_del_if(struct net_bridge *br, struct net_device *dev);
848 void br_mtu_auto_adjust(struct net_bridge *br);
849 netdev_features_t br_features_recompute(struct net_bridge *br,
850 					netdev_features_t features);
851 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
852 void br_manage_promisc(struct net_bridge *br);
853 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev);
854 
855 /* br_input.c */
856 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
857 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev);
858 
859 struct br_frame_type {
860 	__be16			type;
861 	int			(*frame_handler)(struct net_bridge_port *port,
862 						 struct sk_buff *skb);
863 	struct hlist_node	list;
864 };
865 
866 void br_add_frame(struct net_bridge *br, struct br_frame_type *ft);
867 void br_del_frame(struct net_bridge *br, struct br_frame_type *ft);
868 
br_rx_handler_check_rcu(const struct net_device * dev)869 static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
870 {
871 	return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev);
872 }
873 
br_rx_handler_check_rtnl(const struct net_device * dev)874 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev)
875 {
876 	return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev);
877 }
878 
br_port_get_check_rcu(const struct net_device * dev)879 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
880 {
881 	return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
882 }
883 
884 static inline struct net_bridge_port *
br_port_get_check_rtnl(const struct net_device * dev)885 br_port_get_check_rtnl(const struct net_device *dev)
886 {
887 	return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL;
888 }
889 
890 /* br_ioctl.c */
891 int br_dev_siocdevprivate(struct net_device *dev, struct ifreq *rq,
892 			  void __user *data, int cmd);
893 int br_ioctl_stub(struct net *net, struct net_bridge *br, unsigned int cmd,
894 		  struct ifreq *ifr, void __user *uarg);
895 
896 /* br_multicast.c */
897 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
898 int br_multicast_rcv(struct net_bridge_mcast **brmctx,
899 		     struct net_bridge_mcast_port **pmctx,
900 		     struct net_bridge_vlan *vlan,
901 		     struct sk_buff *skb, u16 vid);
902 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx,
903 					struct sk_buff *skb, u16 vid);
904 int br_multicast_add_port(struct net_bridge_port *port);
905 void br_multicast_del_port(struct net_bridge_port *port);
906 void br_multicast_enable_port(struct net_bridge_port *port);
907 void br_multicast_disable_port(struct net_bridge_port *port);
908 void br_multicast_init(struct net_bridge *br);
909 void br_multicast_join_snoopers(struct net_bridge *br);
910 void br_multicast_leave_snoopers(struct net_bridge *br);
911 void br_multicast_open(struct net_bridge *br);
912 void br_multicast_stop(struct net_bridge *br);
913 void br_multicast_dev_del(struct net_bridge *br);
914 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, struct sk_buff *skb,
915 			struct net_bridge_mcast *brmctx,
916 			bool local_rcv, bool local_orig);
917 int br_multicast_set_router(struct net_bridge_mcast *brmctx, unsigned long val);
918 int br_multicast_set_port_router(struct net_bridge_mcast_port *pmctx,
919 				 unsigned long val);
920 int br_multicast_set_vlan_router(struct net_bridge_vlan *v, u8 mcast_router);
921 int br_multicast_toggle(struct net_bridge *br, unsigned long val,
922 			struct netlink_ext_ack *extack);
923 int br_multicast_set_querier(struct net_bridge_mcast *brmctx, unsigned long val);
924 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
925 int br_multicast_set_igmp_version(struct net_bridge_mcast *brmctx,
926 				  unsigned long val);
927 #if IS_ENABLED(CONFIG_IPV6)
928 int br_multicast_set_mld_version(struct net_bridge_mcast *brmctx,
929 				 unsigned long val);
930 #endif
931 struct net_bridge_mdb_entry *
932 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst);
933 struct net_bridge_mdb_entry *
934 br_multicast_new_group(struct net_bridge *br, struct br_ip *group);
935 struct net_bridge_port_group *
936 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
937 			    struct net_bridge_port_group __rcu *next,
938 			    unsigned char flags, const unsigned char *src,
939 			    u8 filter_mode, u8 rt_protocol);
940 int br_mdb_hash_init(struct net_bridge *br);
941 void br_mdb_hash_fini(struct net_bridge *br);
942 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp,
943 		   struct net_bridge_port_group *pg, int type);
944 void br_rtr_notify(struct net_device *dev, struct net_bridge_mcast_port *pmctx,
945 		   int type);
946 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp,
947 			 struct net_bridge_port_group *pg,
948 			 struct net_bridge_port_group __rcu **pp);
949 void br_multicast_count(struct net_bridge *br,
950 			const struct net_bridge_port *p,
951 			const struct sk_buff *skb, u8 type, u8 dir);
952 int br_multicast_init_stats(struct net_bridge *br);
953 void br_multicast_uninit_stats(struct net_bridge *br);
954 void br_multicast_get_stats(const struct net_bridge *br,
955 			    const struct net_bridge_port *p,
956 			    struct br_mcast_stats *dest);
957 void br_mdb_init(void);
958 void br_mdb_uninit(void);
959 void br_multicast_host_join(const struct net_bridge_mcast *brmctx,
960 			    struct net_bridge_mdb_entry *mp, bool notify);
961 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify);
962 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg,
963 				     u8 filter_mode);
964 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp,
965 				       struct net_bridge_port_group *sg);
966 struct net_bridge_group_src *
967 br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip);
968 void br_multicast_del_group_src(struct net_bridge_group_src *src,
969 				bool fastleave);
970 void br_multicast_ctx_init(struct net_bridge *br,
971 			   struct net_bridge_vlan *vlan,
972 			   struct net_bridge_mcast *brmctx);
973 void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx);
974 void br_multicast_port_ctx_init(struct net_bridge_port *port,
975 				struct net_bridge_vlan *vlan,
976 				struct net_bridge_mcast_port *pmctx);
977 void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx);
978 void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on);
979 int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on,
980 				      struct netlink_ext_ack *extack);
981 bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on);
982 
983 int br_rports_fill_info(struct sk_buff *skb,
984 			const struct net_bridge_mcast *brmctx);
985 int br_multicast_dump_querier_state(struct sk_buff *skb,
986 				    const struct net_bridge_mcast *brmctx,
987 				    int nest_attr);
988 size_t br_multicast_querier_state_size(void);
989 size_t br_rports_size(const struct net_bridge_mcast *brmctx);
990 void br_multicast_set_query_intvl(struct net_bridge_mcast *brmctx,
991 				  unsigned long val);
992 void br_multicast_set_startup_query_intvl(struct net_bridge_mcast *brmctx,
993 					  unsigned long val);
994 
br_group_is_l2(const struct br_ip * group)995 static inline bool br_group_is_l2(const struct br_ip *group)
996 {
997 	return group->proto == 0;
998 }
999 
1000 #define mlock_dereference(X, br) \
1001 	rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
1002 
1003 static inline struct hlist_node *
br_multicast_get_first_rport_node(struct net_bridge_mcast * brmctx,struct sk_buff * skb)1004 br_multicast_get_first_rport_node(struct net_bridge_mcast *brmctx,
1005 				  struct sk_buff *skb)
1006 {
1007 #if IS_ENABLED(CONFIG_IPV6)
1008 	if (skb->protocol == htons(ETH_P_IPV6))
1009 		return rcu_dereference(hlist_first_rcu(&brmctx->ip6_mc_router_list));
1010 #endif
1011 	return rcu_dereference(hlist_first_rcu(&brmctx->ip4_mc_router_list));
1012 }
1013 
1014 static inline struct net_bridge_port *
br_multicast_rport_from_node_skb(struct hlist_node * rp,struct sk_buff * skb)1015 br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb)
1016 {
1017 	struct net_bridge_mcast_port *mctx;
1018 
1019 #if IS_ENABLED(CONFIG_IPV6)
1020 	if (skb->protocol == htons(ETH_P_IPV6))
1021 		mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port,
1022 					ip6_rlist);
1023 	else
1024 #endif
1025 		mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port,
1026 					ip4_rlist);
1027 
1028 	if (mctx)
1029 		return mctx->port;
1030 	else
1031 		return NULL;
1032 }
1033 
br_ip4_multicast_is_router(struct net_bridge_mcast * brmctx)1034 static inline bool br_ip4_multicast_is_router(struct net_bridge_mcast *brmctx)
1035 {
1036 	return timer_pending(&brmctx->ip4_mc_router_timer);
1037 }
1038 
br_ip6_multicast_is_router(struct net_bridge_mcast * brmctx)1039 static inline bool br_ip6_multicast_is_router(struct net_bridge_mcast *brmctx)
1040 {
1041 #if IS_ENABLED(CONFIG_IPV6)
1042 	return timer_pending(&brmctx->ip6_mc_router_timer);
1043 #else
1044 	return false;
1045 #endif
1046 }
1047 
1048 static inline bool
br_multicast_is_router(struct net_bridge_mcast * brmctx,struct sk_buff * skb)1049 br_multicast_is_router(struct net_bridge_mcast *brmctx, struct sk_buff *skb)
1050 {
1051 	switch (brmctx->multicast_router) {
1052 	case MDB_RTR_TYPE_PERM:
1053 		return true;
1054 	case MDB_RTR_TYPE_TEMP_QUERY:
1055 		if (skb) {
1056 			if (skb->protocol == htons(ETH_P_IP))
1057 				return br_ip4_multicast_is_router(brmctx);
1058 			else if (skb->protocol == htons(ETH_P_IPV6))
1059 				return br_ip6_multicast_is_router(brmctx);
1060 		} else {
1061 			return br_ip4_multicast_is_router(brmctx) ||
1062 			       br_ip6_multicast_is_router(brmctx);
1063 		}
1064 		fallthrough;
1065 	default:
1066 		return false;
1067 	}
1068 }
1069 
1070 static inline bool
__br_multicast_querier_exists(struct net_bridge_mcast * brmctx,struct bridge_mcast_other_query * querier,const bool is_ipv6)1071 __br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1072 			      struct bridge_mcast_other_query *querier,
1073 			      const bool is_ipv6)
1074 {
1075 	bool own_querier_enabled;
1076 
1077 	if (brmctx->multicast_querier) {
1078 		if (is_ipv6 && !br_opt_get(brmctx->br, BROPT_HAS_IPV6_ADDR))
1079 			own_querier_enabled = false;
1080 		else
1081 			own_querier_enabled = true;
1082 	} else {
1083 		own_querier_enabled = false;
1084 	}
1085 
1086 	return !timer_pending(&querier->delay_timer) &&
1087 	       (own_querier_enabled || timer_pending(&querier->timer));
1088 }
1089 
br_multicast_querier_exists(struct net_bridge_mcast * brmctx,struct ethhdr * eth,const struct net_bridge_mdb_entry * mdb)1090 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1091 					       struct ethhdr *eth,
1092 					       const struct net_bridge_mdb_entry *mdb)
1093 {
1094 	switch (eth->h_proto) {
1095 	case (htons(ETH_P_IP)):
1096 		return __br_multicast_querier_exists(brmctx,
1097 			&brmctx->ip4_other_query, false);
1098 #if IS_ENABLED(CONFIG_IPV6)
1099 	case (htons(ETH_P_IPV6)):
1100 		return __br_multicast_querier_exists(brmctx,
1101 			&brmctx->ip6_other_query, true);
1102 #endif
1103 	default:
1104 		return !!mdb && br_group_is_l2(&mdb->addr);
1105 	}
1106 }
1107 
br_multicast_is_star_g(const struct br_ip * ip)1108 static inline bool br_multicast_is_star_g(const struct br_ip *ip)
1109 {
1110 	switch (ip->proto) {
1111 	case htons(ETH_P_IP):
1112 		return ipv4_is_zeronet(ip->src.ip4);
1113 #if IS_ENABLED(CONFIG_IPV6)
1114 	case htons(ETH_P_IPV6):
1115 		return ipv6_addr_any(&ip->src.ip6);
1116 #endif
1117 	default:
1118 		return false;
1119 	}
1120 }
1121 
1122 static inline bool
br_multicast_should_handle_mode(const struct net_bridge_mcast * brmctx,__be16 proto)1123 br_multicast_should_handle_mode(const struct net_bridge_mcast *brmctx,
1124 				__be16 proto)
1125 {
1126 	switch (proto) {
1127 	case htons(ETH_P_IP):
1128 		return !!(brmctx->multicast_igmp_version == 3);
1129 #if IS_ENABLED(CONFIG_IPV6)
1130 	case htons(ETH_P_IPV6):
1131 		return !!(brmctx->multicast_mld_version == 2);
1132 #endif
1133 	default:
1134 		return false;
1135 	}
1136 }
1137 
br_multicast_igmp_type(const struct sk_buff * skb)1138 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
1139 {
1140 	return BR_INPUT_SKB_CB(skb)->igmp;
1141 }
1142 
br_multicast_lmqt(const struct net_bridge_mcast * brmctx)1143 static inline unsigned long br_multicast_lmqt(const struct net_bridge_mcast *brmctx)
1144 {
1145 	return brmctx->multicast_last_member_interval *
1146 	       brmctx->multicast_last_member_count;
1147 }
1148 
br_multicast_gmi(const struct net_bridge_mcast * brmctx)1149 static inline unsigned long br_multicast_gmi(const struct net_bridge_mcast *brmctx)
1150 {
1151 	return brmctx->multicast_membership_interval;
1152 }
1153 
1154 static inline bool
br_multicast_ctx_is_vlan(const struct net_bridge_mcast * brmctx)1155 br_multicast_ctx_is_vlan(const struct net_bridge_mcast *brmctx)
1156 {
1157 	return !!brmctx->vlan;
1158 }
1159 
1160 static inline bool
br_multicast_port_ctx_is_vlan(const struct net_bridge_mcast_port * pmctx)1161 br_multicast_port_ctx_is_vlan(const struct net_bridge_mcast_port *pmctx)
1162 {
1163 	return !!pmctx->vlan;
1164 }
1165 
1166 static inline struct net_bridge_mcast *
br_multicast_port_ctx_get_global(const struct net_bridge_mcast_port * pmctx)1167 br_multicast_port_ctx_get_global(const struct net_bridge_mcast_port *pmctx)
1168 {
1169 	if (!br_multicast_port_ctx_is_vlan(pmctx))
1170 		return &pmctx->port->br->multicast_ctx;
1171 	else
1172 		return &pmctx->vlan->brvlan->br_mcast_ctx;
1173 }
1174 
1175 static inline bool
br_multicast_ctx_vlan_global_disabled(const struct net_bridge_mcast * brmctx)1176 br_multicast_ctx_vlan_global_disabled(const struct net_bridge_mcast *brmctx)
1177 {
1178 	return br_multicast_ctx_is_vlan(brmctx) &&
1179 	       (!br_opt_get(brmctx->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) ||
1180 		!(brmctx->vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED));
1181 }
1182 
1183 static inline bool
br_multicast_ctx_vlan_disabled(const struct net_bridge_mcast * brmctx)1184 br_multicast_ctx_vlan_disabled(const struct net_bridge_mcast *brmctx)
1185 {
1186 	return br_multicast_ctx_is_vlan(brmctx) &&
1187 	       !(brmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED);
1188 }
1189 
1190 static inline bool
br_multicast_port_ctx_vlan_disabled(const struct net_bridge_mcast_port * pmctx)1191 br_multicast_port_ctx_vlan_disabled(const struct net_bridge_mcast_port *pmctx)
1192 {
1193 	return br_multicast_port_ctx_is_vlan(pmctx) &&
1194 	       !(pmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED);
1195 }
1196 
1197 static inline bool
br_multicast_port_ctx_state_disabled(const struct net_bridge_mcast_port * pmctx)1198 br_multicast_port_ctx_state_disabled(const struct net_bridge_mcast_port *pmctx)
1199 {
1200 	return pmctx->port->state == BR_STATE_DISABLED ||
1201 	       (br_multicast_port_ctx_is_vlan(pmctx) &&
1202 		(br_multicast_port_ctx_vlan_disabled(pmctx) ||
1203 		 pmctx->vlan->state == BR_STATE_DISABLED));
1204 }
1205 
1206 static inline bool
br_multicast_port_ctx_state_stopped(const struct net_bridge_mcast_port * pmctx)1207 br_multicast_port_ctx_state_stopped(const struct net_bridge_mcast_port *pmctx)
1208 {
1209 	return br_multicast_port_ctx_state_disabled(pmctx) ||
1210 	       pmctx->port->state == BR_STATE_BLOCKING ||
1211 	       (br_multicast_port_ctx_is_vlan(pmctx) &&
1212 		pmctx->vlan->state == BR_STATE_BLOCKING);
1213 }
1214 
1215 static inline bool
br_rports_have_mc_router(const struct net_bridge_mcast * brmctx)1216 br_rports_have_mc_router(const struct net_bridge_mcast *brmctx)
1217 {
1218 #if IS_ENABLED(CONFIG_IPV6)
1219 	return !hlist_empty(&brmctx->ip4_mc_router_list) ||
1220 	       !hlist_empty(&brmctx->ip6_mc_router_list);
1221 #else
1222 	return !hlist_empty(&brmctx->ip4_mc_router_list);
1223 #endif
1224 }
1225 
1226 static inline bool
br_multicast_ctx_options_equal(const struct net_bridge_mcast * brmctx1,const struct net_bridge_mcast * brmctx2)1227 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1,
1228 			       const struct net_bridge_mcast *brmctx2)
1229 {
1230 	return brmctx1->multicast_igmp_version ==
1231 	       brmctx2->multicast_igmp_version &&
1232 	       brmctx1->multicast_last_member_count ==
1233 	       brmctx2->multicast_last_member_count &&
1234 	       brmctx1->multicast_startup_query_count ==
1235 	       brmctx2->multicast_startup_query_count &&
1236 	       brmctx1->multicast_last_member_interval ==
1237 	       brmctx2->multicast_last_member_interval &&
1238 	       brmctx1->multicast_membership_interval ==
1239 	       brmctx2->multicast_membership_interval &&
1240 	       brmctx1->multicast_querier_interval ==
1241 	       brmctx2->multicast_querier_interval &&
1242 	       brmctx1->multicast_query_interval ==
1243 	       brmctx2->multicast_query_interval &&
1244 	       brmctx1->multicast_query_response_interval ==
1245 	       brmctx2->multicast_query_response_interval &&
1246 	       brmctx1->multicast_startup_query_interval ==
1247 	       brmctx2->multicast_startup_query_interval &&
1248 	       brmctx1->multicast_querier == brmctx2->multicast_querier &&
1249 	       brmctx1->multicast_router == brmctx2->multicast_router &&
1250 	       !br_rports_have_mc_router(brmctx1) &&
1251 	       !br_rports_have_mc_router(brmctx2) &&
1252 #if IS_ENABLED(CONFIG_IPV6)
1253 	       brmctx1->multicast_mld_version ==
1254 	       brmctx2->multicast_mld_version &&
1255 #endif
1256 	       true;
1257 }
1258 
1259 static inline bool
br_multicast_ctx_matches_vlan_snooping(const struct net_bridge_mcast * brmctx)1260 br_multicast_ctx_matches_vlan_snooping(const struct net_bridge_mcast *brmctx)
1261 {
1262 	bool vlan_snooping_enabled;
1263 
1264 	vlan_snooping_enabled = !!br_opt_get(brmctx->br,
1265 					     BROPT_MCAST_VLAN_SNOOPING_ENABLED);
1266 
1267 	return !!(vlan_snooping_enabled == br_multicast_ctx_is_vlan(brmctx));
1268 }
1269 #else
br_multicast_rcv(struct net_bridge_mcast ** brmctx,struct net_bridge_mcast_port ** pmctx,struct net_bridge_vlan * vlan,struct sk_buff * skb,u16 vid)1270 static inline int br_multicast_rcv(struct net_bridge_mcast **brmctx,
1271 				   struct net_bridge_mcast_port **pmctx,
1272 				   struct net_bridge_vlan *vlan,
1273 				   struct sk_buff *skb,
1274 				   u16 vid)
1275 {
1276 	return 0;
1277 }
1278 
br_mdb_get(struct net_bridge_mcast * brmctx,struct sk_buff * skb,u16 vid)1279 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx,
1280 						      struct sk_buff *skb, u16 vid)
1281 {
1282 	return NULL;
1283 }
1284 
br_multicast_add_port(struct net_bridge_port * port)1285 static inline int br_multicast_add_port(struct net_bridge_port *port)
1286 {
1287 	return 0;
1288 }
1289 
br_multicast_del_port(struct net_bridge_port * port)1290 static inline void br_multicast_del_port(struct net_bridge_port *port)
1291 {
1292 }
1293 
br_multicast_enable_port(struct net_bridge_port * port)1294 static inline void br_multicast_enable_port(struct net_bridge_port *port)
1295 {
1296 }
1297 
br_multicast_disable_port(struct net_bridge_port * port)1298 static inline void br_multicast_disable_port(struct net_bridge_port *port)
1299 {
1300 }
1301 
br_multicast_init(struct net_bridge * br)1302 static inline void br_multicast_init(struct net_bridge *br)
1303 {
1304 }
1305 
br_multicast_join_snoopers(struct net_bridge * br)1306 static inline void br_multicast_join_snoopers(struct net_bridge *br)
1307 {
1308 }
1309 
br_multicast_leave_snoopers(struct net_bridge * br)1310 static inline void br_multicast_leave_snoopers(struct net_bridge *br)
1311 {
1312 }
1313 
br_multicast_open(struct net_bridge * br)1314 static inline void br_multicast_open(struct net_bridge *br)
1315 {
1316 }
1317 
br_multicast_stop(struct net_bridge * br)1318 static inline void br_multicast_stop(struct net_bridge *br)
1319 {
1320 }
1321 
br_multicast_dev_del(struct net_bridge * br)1322 static inline void br_multicast_dev_del(struct net_bridge *br)
1323 {
1324 }
1325 
br_multicast_flood(struct net_bridge_mdb_entry * mdst,struct sk_buff * skb,struct net_bridge_mcast * brmctx,bool local_rcv,bool local_orig)1326 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
1327 				      struct sk_buff *skb,
1328 				      struct net_bridge_mcast *brmctx,
1329 				      bool local_rcv, bool local_orig)
1330 {
1331 }
1332 
br_multicast_is_router(struct net_bridge_mcast * brmctx,struct sk_buff * skb)1333 static inline bool br_multicast_is_router(struct net_bridge_mcast *brmctx,
1334 					  struct sk_buff *skb)
1335 {
1336 	return false;
1337 }
1338 
br_multicast_querier_exists(struct net_bridge_mcast * brmctx,struct ethhdr * eth,const struct net_bridge_mdb_entry * mdb)1339 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1340 					       struct ethhdr *eth,
1341 					       const struct net_bridge_mdb_entry *mdb)
1342 {
1343 	return false;
1344 }
1345 
br_mdb_init(void)1346 static inline void br_mdb_init(void)
1347 {
1348 }
1349 
br_mdb_uninit(void)1350 static inline void br_mdb_uninit(void)
1351 {
1352 }
1353 
br_mdb_hash_init(struct net_bridge * br)1354 static inline int br_mdb_hash_init(struct net_bridge *br)
1355 {
1356 	return 0;
1357 }
1358 
br_mdb_hash_fini(struct net_bridge * br)1359 static inline void br_mdb_hash_fini(struct net_bridge *br)
1360 {
1361 }
1362 
br_multicast_count(struct net_bridge * br,const struct net_bridge_port * p,const struct sk_buff * skb,u8 type,u8 dir)1363 static inline void br_multicast_count(struct net_bridge *br,
1364 				      const struct net_bridge_port *p,
1365 				      const struct sk_buff *skb,
1366 				      u8 type, u8 dir)
1367 {
1368 }
1369 
br_multicast_init_stats(struct net_bridge * br)1370 static inline int br_multicast_init_stats(struct net_bridge *br)
1371 {
1372 	return 0;
1373 }
1374 
br_multicast_uninit_stats(struct net_bridge * br)1375 static inline void br_multicast_uninit_stats(struct net_bridge *br)
1376 {
1377 }
1378 
br_multicast_igmp_type(const struct sk_buff * skb)1379 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
1380 {
1381 	return 0;
1382 }
1383 
br_multicast_ctx_init(struct net_bridge * br,struct net_bridge_vlan * vlan,struct net_bridge_mcast * brmctx)1384 static inline void br_multicast_ctx_init(struct net_bridge *br,
1385 					 struct net_bridge_vlan *vlan,
1386 					 struct net_bridge_mcast *brmctx)
1387 {
1388 }
1389 
br_multicast_ctx_deinit(struct net_bridge_mcast * brmctx)1390 static inline void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx)
1391 {
1392 }
1393 
br_multicast_port_ctx_init(struct net_bridge_port * port,struct net_bridge_vlan * vlan,struct net_bridge_mcast_port * pmctx)1394 static inline void br_multicast_port_ctx_init(struct net_bridge_port *port,
1395 					      struct net_bridge_vlan *vlan,
1396 					      struct net_bridge_mcast_port *pmctx)
1397 {
1398 }
1399 
br_multicast_port_ctx_deinit(struct net_bridge_mcast_port * pmctx)1400 static inline void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx)
1401 {
1402 }
1403 
br_multicast_toggle_one_vlan(struct net_bridge_vlan * vlan,bool on)1404 static inline void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan,
1405 						bool on)
1406 {
1407 }
1408 
br_multicast_toggle_vlan_snooping(struct net_bridge * br,bool on,struct netlink_ext_ack * extack)1409 static inline int br_multicast_toggle_vlan_snooping(struct net_bridge *br,
1410 						    bool on,
1411 						    struct netlink_ext_ack *extack)
1412 {
1413 	return -EOPNOTSUPP;
1414 }
1415 
br_multicast_toggle_global_vlan(struct net_bridge_vlan * vlan,bool on)1416 static inline bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan,
1417 						   bool on)
1418 {
1419 	return false;
1420 }
1421 
1422 static inline bool
br_multicast_ctx_options_equal(const struct net_bridge_mcast * brmctx1,const struct net_bridge_mcast * brmctx2)1423 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1,
1424 			       const struct net_bridge_mcast *brmctx2)
1425 {
1426 	return true;
1427 }
1428 #endif
1429 
1430 /* br_vlan.c */
1431 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1432 bool br_allowed_ingress(const struct net_bridge *br,
1433 			struct net_bridge_vlan_group *vg, struct sk_buff *skb,
1434 			u16 *vid, u8 *state,
1435 			struct net_bridge_vlan **vlan);
1436 bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1437 		       const struct sk_buff *skb);
1438 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
1439 struct sk_buff *br_handle_vlan(struct net_bridge *br,
1440 			       const struct net_bridge_port *port,
1441 			       struct net_bridge_vlan_group *vg,
1442 			       struct sk_buff *skb);
1443 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1444 		bool *changed, struct netlink_ext_ack *extack);
1445 int br_vlan_delete(struct net_bridge *br, u16 vid);
1446 void br_vlan_flush(struct net_bridge *br);
1447 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
1448 void br_recalculate_fwd_mask(struct net_bridge *br);
1449 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val,
1450 			  struct netlink_ext_ack *extack);
1451 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto,
1452 			struct netlink_ext_ack *extack);
1453 int br_vlan_set_proto(struct net_bridge *br, unsigned long val,
1454 		      struct netlink_ext_ack *extack);
1455 int br_vlan_set_stats(struct net_bridge *br, unsigned long val);
1456 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val);
1457 int br_vlan_init(struct net_bridge *br);
1458 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val,
1459 			     struct netlink_ext_ack *extack);
1460 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid,
1461 			       struct netlink_ext_ack *extack);
1462 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1463 		 bool *changed, struct netlink_ext_ack *extack);
1464 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
1465 void nbp_vlan_flush(struct net_bridge_port *port);
1466 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack);
1467 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
1468 void br_vlan_get_stats(const struct net_bridge_vlan *v,
1469 		       struct pcpu_sw_netstats *stats);
1470 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event);
1471 int br_vlan_bridge_event(struct net_device *dev, unsigned long event,
1472 			 void *ptr);
1473 void br_vlan_rtnl_init(void);
1474 void br_vlan_rtnl_uninit(void);
1475 void br_vlan_notify(const struct net_bridge *br,
1476 		    const struct net_bridge_port *p,
1477 		    u16 vid, u16 vid_range,
1478 		    int cmd);
1479 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1480 			     const struct net_bridge_vlan *range_end);
1481 
1482 void br_vlan_fill_forward_path_pvid(struct net_bridge *br,
1483 				    struct net_device_path_ctx *ctx,
1484 				    struct net_device_path *path);
1485 int br_vlan_fill_forward_path_mode(struct net_bridge *br,
1486 				   struct net_bridge_port *dst,
1487 				   struct net_device_path *path);
1488 
br_vlan_group(const struct net_bridge * br)1489 static inline struct net_bridge_vlan_group *br_vlan_group(
1490 					const struct net_bridge *br)
1491 {
1492 	return rtnl_dereference(br->vlgrp);
1493 }
1494 
nbp_vlan_group(const struct net_bridge_port * p)1495 static inline struct net_bridge_vlan_group *nbp_vlan_group(
1496 					const struct net_bridge_port *p)
1497 {
1498 	return rtnl_dereference(p->vlgrp);
1499 }
1500 
br_vlan_group_rcu(const struct net_bridge * br)1501 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1502 					const struct net_bridge *br)
1503 {
1504 	return rcu_dereference(br->vlgrp);
1505 }
1506 
nbp_vlan_group_rcu(const struct net_bridge_port * p)1507 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1508 					const struct net_bridge_port *p)
1509 {
1510 	return rcu_dereference(p->vlgrp);
1511 }
1512 
1513 /* Since bridge now depends on 8021Q module, but the time bridge sees the
1514  * skb, the vlan tag will always be present if the frame was tagged.
1515  */
br_vlan_get_tag(const struct sk_buff * skb,u16 * vid)1516 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
1517 {
1518 	int err = 0;
1519 
1520 	if (skb_vlan_tag_present(skb)) {
1521 		*vid = skb_vlan_tag_get_id(skb);
1522 	} else {
1523 		*vid = 0;
1524 		err = -EINVAL;
1525 	}
1526 
1527 	return err;
1528 }
1529 
br_get_pvid(const struct net_bridge_vlan_group * vg)1530 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1531 {
1532 	if (!vg)
1533 		return 0;
1534 
1535 	smp_rmb();
1536 	return vg->pvid;
1537 }
1538 
br_vlan_flags(const struct net_bridge_vlan * v,u16 pvid)1539 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid)
1540 {
1541 	return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags;
1542 }
1543 #else
br_allowed_ingress(const struct net_bridge * br,struct net_bridge_vlan_group * vg,struct sk_buff * skb,u16 * vid,u8 * state,struct net_bridge_vlan ** vlan)1544 static inline bool br_allowed_ingress(const struct net_bridge *br,
1545 				      struct net_bridge_vlan_group *vg,
1546 				      struct sk_buff *skb,
1547 				      u16 *vid, u8 *state,
1548 				      struct net_bridge_vlan **vlan)
1549 
1550 {
1551 	*vlan = NULL;
1552 	return true;
1553 }
1554 
br_allowed_egress(struct net_bridge_vlan_group * vg,const struct sk_buff * skb)1555 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1556 				     const struct sk_buff *skb)
1557 {
1558 	return true;
1559 }
1560 
br_should_learn(struct net_bridge_port * p,struct sk_buff * skb,u16 * vid)1561 static inline bool br_should_learn(struct net_bridge_port *p,
1562 				   struct sk_buff *skb, u16 *vid)
1563 {
1564 	return true;
1565 }
1566 
br_handle_vlan(struct net_bridge * br,const struct net_bridge_port * port,struct net_bridge_vlan_group * vg,struct sk_buff * skb)1567 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
1568 					     const struct net_bridge_port *port,
1569 					     struct net_bridge_vlan_group *vg,
1570 					     struct sk_buff *skb)
1571 {
1572 	return skb;
1573 }
1574 
br_vlan_add(struct net_bridge * br,u16 vid,u16 flags,bool * changed,struct netlink_ext_ack * extack)1575 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1576 			      bool *changed, struct netlink_ext_ack *extack)
1577 {
1578 	*changed = false;
1579 	return -EOPNOTSUPP;
1580 }
1581 
br_vlan_delete(struct net_bridge * br,u16 vid)1582 static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
1583 {
1584 	return -EOPNOTSUPP;
1585 }
1586 
br_vlan_flush(struct net_bridge * br)1587 static inline void br_vlan_flush(struct net_bridge *br)
1588 {
1589 }
1590 
br_recalculate_fwd_mask(struct net_bridge * br)1591 static inline void br_recalculate_fwd_mask(struct net_bridge *br)
1592 {
1593 }
1594 
br_vlan_init(struct net_bridge * br)1595 static inline int br_vlan_init(struct net_bridge *br)
1596 {
1597 	return 0;
1598 }
1599 
nbp_vlan_add(struct net_bridge_port * port,u16 vid,u16 flags,bool * changed,struct netlink_ext_ack * extack)1600 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1601 			       bool *changed, struct netlink_ext_ack *extack)
1602 {
1603 	*changed = false;
1604 	return -EOPNOTSUPP;
1605 }
1606 
nbp_vlan_delete(struct net_bridge_port * port,u16 vid)1607 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
1608 {
1609 	return -EOPNOTSUPP;
1610 }
1611 
nbp_vlan_flush(struct net_bridge_port * port)1612 static inline void nbp_vlan_flush(struct net_bridge_port *port)
1613 {
1614 }
1615 
br_vlan_find(struct net_bridge_vlan_group * vg,u16 vid)1616 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
1617 						   u16 vid)
1618 {
1619 	return NULL;
1620 }
1621 
nbp_vlan_init(struct net_bridge_port * port,struct netlink_ext_ack * extack)1622 static inline int nbp_vlan_init(struct net_bridge_port *port,
1623 				struct netlink_ext_ack *extack)
1624 {
1625 	return 0;
1626 }
1627 
br_vlan_get_tag(const struct sk_buff * skb,u16 * tag)1628 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
1629 {
1630 	return 0;
1631 }
1632 
br_get_pvid(const struct net_bridge_vlan_group * vg)1633 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1634 {
1635 	return 0;
1636 }
1637 
br_vlan_filter_toggle(struct net_bridge * br,unsigned long val,struct netlink_ext_ack * extack)1638 static inline int br_vlan_filter_toggle(struct net_bridge *br,
1639 					unsigned long val,
1640 					struct netlink_ext_ack *extack)
1641 {
1642 	return -EOPNOTSUPP;
1643 }
1644 
nbp_get_num_vlan_infos(struct net_bridge_port * p,u32 filter_mask)1645 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
1646 					 u32 filter_mask)
1647 {
1648 	return 0;
1649 }
1650 
br_vlan_fill_forward_path_pvid(struct net_bridge * br,struct net_device_path_ctx * ctx,struct net_device_path * path)1651 static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br,
1652 						  struct net_device_path_ctx *ctx,
1653 						  struct net_device_path *path)
1654 {
1655 }
1656 
br_vlan_fill_forward_path_mode(struct net_bridge * br,struct net_bridge_port * dst,struct net_device_path * path)1657 static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br,
1658 						 struct net_bridge_port *dst,
1659 						 struct net_device_path *path)
1660 {
1661 	return 0;
1662 }
1663 
br_vlan_group(const struct net_bridge * br)1664 static inline struct net_bridge_vlan_group *br_vlan_group(
1665 					const struct net_bridge *br)
1666 {
1667 	return NULL;
1668 }
1669 
nbp_vlan_group(const struct net_bridge_port * p)1670 static inline struct net_bridge_vlan_group *nbp_vlan_group(
1671 					const struct net_bridge_port *p)
1672 {
1673 	return NULL;
1674 }
1675 
br_vlan_group_rcu(const struct net_bridge * br)1676 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1677 					const struct net_bridge *br)
1678 {
1679 	return NULL;
1680 }
1681 
nbp_vlan_group_rcu(const struct net_bridge_port * p)1682 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1683 					const struct net_bridge_port *p)
1684 {
1685 	return NULL;
1686 }
1687 
br_vlan_get_stats(const struct net_bridge_vlan * v,struct pcpu_sw_netstats * stats)1688 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v,
1689 				     struct pcpu_sw_netstats *stats)
1690 {
1691 }
1692 
br_vlan_port_event(struct net_bridge_port * p,unsigned long event)1693 static inline void br_vlan_port_event(struct net_bridge_port *p,
1694 				      unsigned long event)
1695 {
1696 }
1697 
br_vlan_bridge_event(struct net_device * dev,unsigned long event,void * ptr)1698 static inline int br_vlan_bridge_event(struct net_device *dev,
1699 				       unsigned long event, void *ptr)
1700 {
1701 	return 0;
1702 }
1703 
br_vlan_rtnl_init(void)1704 static inline void br_vlan_rtnl_init(void)
1705 {
1706 }
1707 
br_vlan_rtnl_uninit(void)1708 static inline void br_vlan_rtnl_uninit(void)
1709 {
1710 }
1711 
br_vlan_notify(const struct net_bridge * br,const struct net_bridge_port * p,u16 vid,u16 vid_range,int cmd)1712 static inline void br_vlan_notify(const struct net_bridge *br,
1713 				  const struct net_bridge_port *p,
1714 				  u16 vid, u16 vid_range,
1715 				  int cmd)
1716 {
1717 }
1718 
br_vlan_can_enter_range(const struct net_bridge_vlan * v_curr,const struct net_bridge_vlan * range_end)1719 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1720 					   const struct net_bridge_vlan *range_end)
1721 {
1722 	return true;
1723 }
1724 
br_vlan_flags(const struct net_bridge_vlan * v,u16 pvid)1725 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid)
1726 {
1727 	return 0;
1728 }
1729 
1730 #endif
1731 
1732 /* br_vlan_options.c */
1733 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1734 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr,
1735 			   const struct net_bridge_vlan *range_end);
1736 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v);
1737 size_t br_vlan_opts_nl_size(void);
1738 int br_vlan_process_options(const struct net_bridge *br,
1739 			    const struct net_bridge_port *p,
1740 			    struct net_bridge_vlan *range_start,
1741 			    struct net_bridge_vlan *range_end,
1742 			    struct nlattr **tb,
1743 			    struct netlink_ext_ack *extack);
1744 int br_vlan_rtm_process_global_options(struct net_device *dev,
1745 				       const struct nlattr *attr,
1746 				       int cmd,
1747 				       struct netlink_ext_ack *extack);
1748 bool br_vlan_global_opts_can_enter_range(const struct net_bridge_vlan *v_curr,
1749 					 const struct net_bridge_vlan *r_end);
1750 bool br_vlan_global_opts_fill(struct sk_buff *skb, u16 vid, u16 vid_range,
1751 			      const struct net_bridge_vlan *v_opts);
1752 
1753 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */
br_vlan_get_state(const struct net_bridge_vlan * v)1754 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v)
1755 {
1756 	return READ_ONCE(v->state);
1757 }
1758 
br_vlan_set_state(struct net_bridge_vlan * v,u8 state)1759 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state)
1760 {
1761 	WRITE_ONCE(v->state, state);
1762 }
1763 
br_vlan_get_pvid_state(const struct net_bridge_vlan_group * vg)1764 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg)
1765 {
1766 	return READ_ONCE(vg->pvid_state);
1767 }
1768 
br_vlan_set_pvid_state(struct net_bridge_vlan_group * vg,u8 state)1769 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg,
1770 					  u8 state)
1771 {
1772 	WRITE_ONCE(vg->pvid_state, state);
1773 }
1774 
1775 /* learn_allow is true at ingress and false at egress */
br_vlan_state_allowed(u8 state,bool learn_allow)1776 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow)
1777 {
1778 	switch (state) {
1779 	case BR_STATE_LEARNING:
1780 		return learn_allow;
1781 	case BR_STATE_FORWARDING:
1782 		return true;
1783 	default:
1784 		return false;
1785 	}
1786 }
1787 #endif
1788 
1789 /* br_mst.c */
1790 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1791 DECLARE_STATIC_KEY_FALSE(br_mst_used);
br_mst_is_enabled(struct net_bridge * br)1792 static inline bool br_mst_is_enabled(struct net_bridge *br)
1793 {
1794 	return static_branch_unlikely(&br_mst_used) &&
1795 		br_opt_get(br, BROPT_MST_ENABLED);
1796 }
1797 
1798 int br_mst_set_state(struct net_bridge_port *p, u16 msti, u8 state,
1799 		     struct netlink_ext_ack *extack);
1800 int br_mst_vlan_set_msti(struct net_bridge_vlan *v, u16 msti);
1801 void br_mst_vlan_init_state(struct net_bridge_vlan *v);
1802 int br_mst_set_enabled(struct net_bridge *br, bool on,
1803 		       struct netlink_ext_ack *extack);
1804 size_t br_mst_info_size(const struct net_bridge_vlan_group *vg);
1805 int br_mst_fill_info(struct sk_buff *skb,
1806 		     const struct net_bridge_vlan_group *vg);
1807 int br_mst_process(struct net_bridge_port *p, const struct nlattr *mst_attr,
1808 		   struct netlink_ext_ack *extack);
1809 #else
br_mst_is_enabled(struct net_bridge * br)1810 static inline bool br_mst_is_enabled(struct net_bridge *br)
1811 {
1812 	return false;
1813 }
1814 
br_mst_set_state(struct net_bridge_port * p,u16 msti,u8 state,struct netlink_ext_ack * extack)1815 static inline int br_mst_set_state(struct net_bridge_port *p, u16 msti,
1816 				   u8 state, struct netlink_ext_ack *extack)
1817 {
1818 	return -EOPNOTSUPP;
1819 }
1820 
br_mst_set_enabled(struct net_bridge * br,bool on,struct netlink_ext_ack * extack)1821 static inline int br_mst_set_enabled(struct net_bridge *br, bool on,
1822 				     struct netlink_ext_ack *extack)
1823 {
1824 	return -EOPNOTSUPP;
1825 }
1826 
br_mst_info_size(const struct net_bridge_vlan_group * vg)1827 static inline size_t br_mst_info_size(const struct net_bridge_vlan_group *vg)
1828 {
1829 	return 0;
1830 }
1831 
br_mst_fill_info(struct sk_buff * skb,const struct net_bridge_vlan_group * vg)1832 static inline int br_mst_fill_info(struct sk_buff *skb,
1833 				   const struct net_bridge_vlan_group *vg)
1834 {
1835 	return -EOPNOTSUPP;
1836 }
1837 
br_mst_process(struct net_bridge_port * p,const struct nlattr * mst_attr,struct netlink_ext_ack * extack)1838 static inline int br_mst_process(struct net_bridge_port *p,
1839 				 const struct nlattr *mst_attr,
1840 				 struct netlink_ext_ack *extack)
1841 {
1842 	return -EOPNOTSUPP;
1843 }
1844 #endif
1845 
1846 struct nf_br_ops {
1847 	int (*br_dev_xmit_hook)(struct sk_buff *skb);
1848 };
1849 extern const struct nf_br_ops __rcu *nf_br_ops;
1850 
1851 /* br_netfilter.c */
1852 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1853 int br_nf_core_init(void);
1854 void br_nf_core_fini(void);
1855 void br_netfilter_rtable_init(struct net_bridge *);
1856 #else
br_nf_core_init(void)1857 static inline int br_nf_core_init(void) { return 0; }
br_nf_core_fini(void)1858 static inline void br_nf_core_fini(void) {}
1859 #define br_netfilter_rtable_init(x)
1860 #endif
1861 
1862 /* br_stp.c */
1863 void br_set_state(struct net_bridge_port *p, unsigned int state);
1864 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
1865 void br_init_port(struct net_bridge_port *p);
1866 void br_become_designated_port(struct net_bridge_port *p);
1867 
1868 void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
1869 int br_set_forward_delay(struct net_bridge *br, unsigned long x);
1870 int br_set_hello_time(struct net_bridge *br, unsigned long x);
1871 int br_set_max_age(struct net_bridge *br, unsigned long x);
1872 int __set_ageing_time(struct net_device *dev, unsigned long t);
1873 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time);
1874 
1875 
1876 /* br_stp_if.c */
1877 void br_stp_enable_bridge(struct net_bridge *br);
1878 void br_stp_disable_bridge(struct net_bridge *br);
1879 int br_stp_set_enabled(struct net_bridge *br, unsigned long val,
1880 		       struct netlink_ext_ack *extack);
1881 void br_stp_enable_port(struct net_bridge_port *p);
1882 void br_stp_disable_port(struct net_bridge_port *p);
1883 bool br_stp_recalculate_bridge_id(struct net_bridge *br);
1884 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
1885 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
1886 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
1887 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
1888 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
1889 
1890 /* br_stp_bpdu.c */
1891 struct stp_proto;
1892 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
1893 		struct net_device *dev);
1894 
1895 /* br_stp_timer.c */
1896 void br_stp_timer_init(struct net_bridge *br);
1897 void br_stp_port_timer_init(struct net_bridge_port *p);
1898 unsigned long br_timer_value(const struct timer_list *timer);
1899 
1900 /* br.c */
1901 #if IS_ENABLED(CONFIG_ATM_LANE)
1902 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
1903 #endif
1904 
1905 /* br_mrp.c */
1906 #if IS_ENABLED(CONFIG_BRIDGE_MRP)
1907 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
1908 		 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
1909 bool br_mrp_enabled(struct net_bridge *br);
1910 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p);
1911 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br);
1912 #else
br_mrp_parse(struct net_bridge * br,struct net_bridge_port * p,struct nlattr * attr,int cmd,struct netlink_ext_ack * extack)1913 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
1914 			       struct nlattr *attr, int cmd,
1915 			       struct netlink_ext_ack *extack)
1916 {
1917 	return -EOPNOTSUPP;
1918 }
1919 
br_mrp_enabled(struct net_bridge * br)1920 static inline bool br_mrp_enabled(struct net_bridge *br)
1921 {
1922 	return false;
1923 }
1924 
br_mrp_port_del(struct net_bridge * br,struct net_bridge_port * p)1925 static inline void br_mrp_port_del(struct net_bridge *br,
1926 				   struct net_bridge_port *p)
1927 {
1928 }
1929 
br_mrp_fill_info(struct sk_buff * skb,struct net_bridge * br)1930 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br)
1931 {
1932 	return 0;
1933 }
1934 
1935 #endif
1936 
1937 /* br_cfm.c */
1938 #if IS_ENABLED(CONFIG_BRIDGE_CFM)
1939 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
1940 		 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
1941 bool br_cfm_created(struct net_bridge *br);
1942 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p);
1943 int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br);
1944 int br_cfm_status_fill_info(struct sk_buff *skb,
1945 			    struct net_bridge *br,
1946 			    bool getlink);
1947 int br_cfm_mep_count(struct net_bridge *br, u32 *count);
1948 int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count);
1949 #else
br_cfm_parse(struct net_bridge * br,struct net_bridge_port * p,struct nlattr * attr,int cmd,struct netlink_ext_ack * extack)1950 static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
1951 			       struct nlattr *attr, int cmd,
1952 			       struct netlink_ext_ack *extack)
1953 {
1954 	return -EOPNOTSUPP;
1955 }
1956 
br_cfm_created(struct net_bridge * br)1957 static inline bool br_cfm_created(struct net_bridge *br)
1958 {
1959 	return false;
1960 }
1961 
br_cfm_port_del(struct net_bridge * br,struct net_bridge_port * p)1962 static inline void br_cfm_port_del(struct net_bridge *br,
1963 				   struct net_bridge_port *p)
1964 {
1965 }
1966 
br_cfm_config_fill_info(struct sk_buff * skb,struct net_bridge * br)1967 static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br)
1968 {
1969 	return -EOPNOTSUPP;
1970 }
1971 
br_cfm_status_fill_info(struct sk_buff * skb,struct net_bridge * br,bool getlink)1972 static inline int br_cfm_status_fill_info(struct sk_buff *skb,
1973 					  struct net_bridge *br,
1974 					  bool getlink)
1975 {
1976 	return -EOPNOTSUPP;
1977 }
1978 
br_cfm_mep_count(struct net_bridge * br,u32 * count)1979 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count)
1980 {
1981 	*count = 0;
1982 	return -EOPNOTSUPP;
1983 }
1984 
br_cfm_peer_mep_count(struct net_bridge * br,u32 * count)1985 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count)
1986 {
1987 	*count = 0;
1988 	return -EOPNOTSUPP;
1989 }
1990 #endif
1991 
1992 /* br_netlink.c */
1993 extern struct rtnl_link_ops br_link_ops;
1994 int br_netlink_init(void);
1995 void br_netlink_fini(void);
1996 void br_ifinfo_notify(int event, const struct net_bridge *br,
1997 		      const struct net_bridge_port *port);
1998 void br_info_notify(int event, const struct net_bridge *br,
1999 		    const struct net_bridge_port *port, u32 filter);
2000 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags,
2001 	       struct netlink_ext_ack *extack);
2002 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
2003 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
2004 	       u32 filter_mask, int nlflags);
2005 int br_process_vlan_info(struct net_bridge *br,
2006 			 struct net_bridge_port *p, int cmd,
2007 			 struct bridge_vlan_info *vinfo_curr,
2008 			 struct bridge_vlan_info **vinfo_last,
2009 			 bool *changed,
2010 			 struct netlink_ext_ack *extack);
2011 
2012 #ifdef CONFIG_SYSFS
2013 /* br_sysfs_if.c */
2014 extern const struct sysfs_ops brport_sysfs_ops;
2015 int br_sysfs_addif(struct net_bridge_port *p);
2016 int br_sysfs_renameif(struct net_bridge_port *p);
2017 
2018 /* br_sysfs_br.c */
2019 int br_sysfs_addbr(struct net_device *dev);
2020 void br_sysfs_delbr(struct net_device *dev);
2021 
2022 #else
2023 
br_sysfs_addif(struct net_bridge_port * p)2024 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
br_sysfs_renameif(struct net_bridge_port * p)2025 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
br_sysfs_addbr(struct net_device * dev)2026 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
br_sysfs_delbr(struct net_device * dev)2027 static inline void br_sysfs_delbr(struct net_device *dev) { return; }
2028 #endif /* CONFIG_SYSFS */
2029 
2030 /* br_switchdev.c */
2031 #ifdef CONFIG_NET_SWITCHDEV
2032 int br_switchdev_port_offload(struct net_bridge_port *p,
2033 			      struct net_device *dev, const void *ctx,
2034 			      struct notifier_block *atomic_nb,
2035 			      struct notifier_block *blocking_nb,
2036 			      bool tx_fwd_offload,
2037 			      struct netlink_ext_ack *extack);
2038 
2039 void br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx,
2040 				 struct notifier_block *atomic_nb,
2041 				 struct notifier_block *blocking_nb);
2042 
2043 bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb);
2044 
2045 void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb);
2046 
2047 void nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p,
2048 					     struct sk_buff *skb);
2049 void nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p,
2050 					      struct sk_buff *skb);
2051 void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
2052 			      struct sk_buff *skb);
2053 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
2054 				  const struct sk_buff *skb);
2055 int br_switchdev_set_port_flag(struct net_bridge_port *p,
2056 			       unsigned long flags,
2057 			       unsigned long mask,
2058 			       struct netlink_ext_ack *extack);
2059 void br_switchdev_fdb_notify(struct net_bridge *br,
2060 			     const struct net_bridge_fdb_entry *fdb, int type);
2061 void br_switchdev_mdb_notify(struct net_device *dev,
2062 			     struct net_bridge_mdb_entry *mp,
2063 			     struct net_bridge_port_group *pg,
2064 			     int type);
2065 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags,
2066 			       bool changed, struct netlink_ext_ack *extack);
2067 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid);
2068 void br_switchdev_init(struct net_bridge *br);
2069 
br_switchdev_frame_unmark(struct sk_buff * skb)2070 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
2071 {
2072 	skb->offload_fwd_mark = 0;
2073 }
2074 #else
2075 static inline int
br_switchdev_port_offload(struct net_bridge_port * p,struct net_device * dev,const void * ctx,struct notifier_block * atomic_nb,struct notifier_block * blocking_nb,bool tx_fwd_offload,struct netlink_ext_ack * extack)2076 br_switchdev_port_offload(struct net_bridge_port *p,
2077 			  struct net_device *dev, const void *ctx,
2078 			  struct notifier_block *atomic_nb,
2079 			  struct notifier_block *blocking_nb,
2080 			  bool tx_fwd_offload,
2081 			  struct netlink_ext_ack *extack)
2082 {
2083 	return -EOPNOTSUPP;
2084 }
2085 
2086 static inline void
br_switchdev_port_unoffload(struct net_bridge_port * p,const void * ctx,struct notifier_block * atomic_nb,struct notifier_block * blocking_nb)2087 br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx,
2088 			    struct notifier_block *atomic_nb,
2089 			    struct notifier_block *blocking_nb)
2090 {
2091 }
2092 
br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff * skb)2093 static inline bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb)
2094 {
2095 	return false;
2096 }
2097 
br_switchdev_frame_set_offload_fwd_mark(struct sk_buff * skb)2098 static inline void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb)
2099 {
2100 }
2101 
2102 static inline void
nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port * p,struct sk_buff * skb)2103 nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p,
2104 					struct sk_buff *skb)
2105 {
2106 }
2107 
2108 static inline void
nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port * p,struct sk_buff * skb)2109 nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p,
2110 					 struct sk_buff *skb)
2111 {
2112 }
2113 
nbp_switchdev_frame_mark(const struct net_bridge_port * p,struct sk_buff * skb)2114 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
2115 					    struct sk_buff *skb)
2116 {
2117 }
2118 
nbp_switchdev_allowed_egress(const struct net_bridge_port * p,const struct sk_buff * skb)2119 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
2120 						const struct sk_buff *skb)
2121 {
2122 	return true;
2123 }
2124 
br_switchdev_set_port_flag(struct net_bridge_port * p,unsigned long flags,unsigned long mask,struct netlink_ext_ack * extack)2125 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p,
2126 					     unsigned long flags,
2127 					     unsigned long mask,
2128 					     struct netlink_ext_ack *extack)
2129 {
2130 	return 0;
2131 }
2132 
br_switchdev_port_vlan_add(struct net_device * dev,u16 vid,u16 flags,bool changed,struct netlink_ext_ack * extack)2133 static inline int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid,
2134 					     u16 flags, bool changed,
2135 					     struct netlink_ext_ack *extack)
2136 {
2137 	return -EOPNOTSUPP;
2138 }
2139 
br_switchdev_port_vlan_del(struct net_device * dev,u16 vid)2140 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid)
2141 {
2142 	return -EOPNOTSUPP;
2143 }
2144 
2145 static inline void
br_switchdev_fdb_notify(struct net_bridge * br,const struct net_bridge_fdb_entry * fdb,int type)2146 br_switchdev_fdb_notify(struct net_bridge *br,
2147 			const struct net_bridge_fdb_entry *fdb, int type)
2148 {
2149 }
2150 
br_switchdev_mdb_notify(struct net_device * dev,struct net_bridge_mdb_entry * mp,struct net_bridge_port_group * pg,int type)2151 static inline void br_switchdev_mdb_notify(struct net_device *dev,
2152 					   struct net_bridge_mdb_entry *mp,
2153 					   struct net_bridge_port_group *pg,
2154 					   int type)
2155 {
2156 }
2157 
br_switchdev_frame_unmark(struct sk_buff * skb)2158 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
2159 {
2160 }
2161 
br_switchdev_init(struct net_bridge * br)2162 static inline void br_switchdev_init(struct net_bridge *br)
2163 {
2164 }
2165 
2166 #endif /* CONFIG_NET_SWITCHDEV */
2167 
2168 /* br_arp_nd_proxy.c */
2169 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br);
2170 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br,
2171 			      u16 vid, struct net_bridge_port *p);
2172 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br,
2173 		       u16 vid, struct net_bridge_port *p, struct nd_msg *msg);
2174 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m);
2175 #endif
2176