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 <net/pkt_cls.h>
19 #include <linux/if_vlan.h>
20 #include <linux/rhashtable.h>
21 #include <linux/refcount.h>
22 
23 #define BR_HASH_BITS 8
24 #define BR_HASH_SIZE (1 << BR_HASH_BITS)
25 
26 #define BR_HOLD_TIME (1*HZ)
27 
28 #define BR_PORT_BITS	10
29 #define BR_MAX_PORTS	(1<<BR_PORT_BITS)
30 
31 #define BR_MULTICAST_DEFAULT_HASH_MAX 4096
32 #define BR_MULTICAST_QUERY_INTVL_MIN msecs_to_jiffies(1000)
33 #define BR_MULTICAST_STARTUP_QUERY_INTVL_MIN BR_MULTICAST_QUERY_INTVL_MIN
34 
35 #define BR_HWDOM_MAX BITS_PER_LONG
36 
37 #define BR_VERSION	"2.3"
38 
39 /* Control of forwarding link local multicast */
40 #define BR_GROUPFWD_DEFAULT	0
41 /* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */
42 enum {
43 	BR_GROUPFWD_STP		= BIT(0),
44 	BR_GROUPFWD_MACPAUSE	= BIT(1),
45 	BR_GROUPFWD_LACP	= BIT(2),
46 };
47 
48 #define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \
49 				BR_GROUPFWD_LACP)
50 /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
51 #define BR_GROUPFWD_8021AD	0xB801u
52 
53 /* Path to usermode spanning tree program */
54 #define BR_STP_PROG	"/sbin/bridge-stp"
55 
56 #define BR_FDB_NOTIFY_SETTABLE_BITS (FDB_NOTIFY_BIT | FDB_NOTIFY_INACTIVE_BIT)
57 
58 typedef struct bridge_id bridge_id;
59 typedef struct mac_addr mac_addr;
60 typedef __u16 port_id;
61 
62 struct bridge_id {
63 	unsigned char	prio[2];
64 	unsigned char	addr[ETH_ALEN];
65 };
66 
67 struct mac_addr {
68 	unsigned char	addr[ETH_ALEN];
69 };
70 
71 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
72 /* our own querier */
73 struct bridge_mcast_own_query {
74 	struct timer_list	timer;
75 	u32			startup_sent;
76 };
77 
78 /* other querier */
79 struct bridge_mcast_other_query {
80 	struct timer_list		timer;
81 	struct timer_list		delay_timer;
82 };
83 
84 /* selected querier */
85 struct bridge_mcast_querier {
86 	struct br_ip addr;
87 	int port_ifidx;
88 	seqcount_spinlock_t seq;
89 };
90 
91 /* IGMP/MLD statistics */
92 struct bridge_mcast_stats {
93 	struct br_mcast_stats mstats;
94 	struct u64_stats_sync syncp;
95 };
96 
97 struct br_mdb_src_entry {
98 	struct br_ip			addr;
99 };
100 
101 struct br_mdb_config {
102 	struct net_bridge		*br;
103 	struct net_bridge_port		*p;
104 	struct br_mdb_entry		*entry;
105 	struct br_ip			group;
106 	bool				src_entry;
107 	u8				filter_mode;
108 	u16				nlflags;
109 	struct br_mdb_src_entry		*src_entries;
110 	int				num_src_entries;
111 	u8				rt_protocol;
112 };
113 #endif
114 
115 /* net_bridge_mcast_port must be always defined due to forwarding stubs */
116 struct net_bridge_mcast_port {
117 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
118 	struct net_bridge_port		*port;
119 	struct net_bridge_vlan		*vlan;
120 
121 	struct bridge_mcast_own_query	ip4_own_query;
122 	struct timer_list		ip4_mc_router_timer;
123 	struct hlist_node		ip4_rlist;
124 #if IS_ENABLED(CONFIG_IPV6)
125 	struct bridge_mcast_own_query	ip6_own_query;
126 	struct timer_list		ip6_mc_router_timer;
127 	struct hlist_node		ip6_rlist;
128 #endif /* IS_ENABLED(CONFIG_IPV6) */
129 	unsigned char			multicast_router;
130 	u32				mdb_n_entries;
131 	u32				mdb_max_entries;
132 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */
133 };
134 
135 /* net_bridge_mcast must be always defined due to forwarding stubs */
136 struct net_bridge_mcast {
137 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
138 	struct net_bridge		*br;
139 	struct net_bridge_vlan		*vlan;
140 
141 	u32				multicast_last_member_count;
142 	u32				multicast_startup_query_count;
143 
144 	u8				multicast_querier;
145 	u8				multicast_igmp_version;
146 	u8				multicast_router;
147 #if IS_ENABLED(CONFIG_IPV6)
148 	u8				multicast_mld_version;
149 #endif
150 	unsigned long			multicast_last_member_interval;
151 	unsigned long			multicast_membership_interval;
152 	unsigned long			multicast_querier_interval;
153 	unsigned long			multicast_query_interval;
154 	unsigned long			multicast_query_response_interval;
155 	unsigned long			multicast_startup_query_interval;
156 	struct hlist_head		ip4_mc_router_list;
157 	struct timer_list		ip4_mc_router_timer;
158 	struct bridge_mcast_other_query	ip4_other_query;
159 	struct bridge_mcast_own_query	ip4_own_query;
160 	struct bridge_mcast_querier	ip4_querier;
161 #if IS_ENABLED(CONFIG_IPV6)
162 	struct hlist_head		ip6_mc_router_list;
163 	struct timer_list		ip6_mc_router_timer;
164 	struct bridge_mcast_other_query	ip6_other_query;
165 	struct bridge_mcast_own_query	ip6_own_query;
166 	struct bridge_mcast_querier	ip6_querier;
167 #endif /* IS_ENABLED(CONFIG_IPV6) */
168 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */
169 };
170 
171 struct br_tunnel_info {
172 	__be64				tunnel_id;
173 	struct metadata_dst __rcu	*tunnel_dst;
174 };
175 
176 /* private vlan flags */
177 enum {
178 	BR_VLFLAG_PER_PORT_STATS = BIT(0),
179 	BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1),
180 	BR_VLFLAG_MCAST_ENABLED = BIT(2),
181 	BR_VLFLAG_GLOBAL_MCAST_ENABLED = BIT(3),
182 	BR_VLFLAG_NEIGH_SUPPRESS_ENABLED = BIT(4),
183 };
184 
185 /**
186  * struct net_bridge_vlan - per-vlan entry
187  *
188  * @vnode: rhashtable member
189  * @vid: VLAN id
190  * @flags: bridge vlan flags
191  * @priv_flags: private (in-kernel) bridge vlan flags
192  * @state: STP state (e.g. blocking, learning, forwarding)
193  * @stats: per-cpu VLAN statistics
194  * @br: if MASTER flag set, this points to a bridge struct
195  * @port: if MASTER flag unset, this points to a port struct
196  * @refcnt: if MASTER flag set, this is bumped for each port referencing it
197  * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
198  *          for this VLAN entry
199  * @br_mcast_ctx: if MASTER flag set, this is the global vlan multicast context
200  * @port_mcast_ctx: if MASTER flag unset, this is the per-port/vlan multicast
201  *                  context
202  * @msti: if MASTER flag set, this holds the VLANs MST instance
203  * @vlist: sorted list of VLAN entries
204  * @rcu: used for entry destruction
205  *
206  * This structure is shared between the global per-VLAN entries contained in
207  * the bridge rhashtable and the local per-port per-VLAN entries contained in
208  * the port's rhashtable. The union entries should be interpreted depending on
209  * the entry flags that are set.
210  */
211 struct net_bridge_vlan {
212 	struct rhash_head		vnode;
213 	struct rhash_head		tnode;
214 	u16				vid;
215 	u16				flags;
216 	u16				priv_flags;
217 	u8				state;
218 	struct pcpu_sw_netstats __percpu *stats;
219 	union {
220 		struct net_bridge	*br;
221 		struct net_bridge_port	*port;
222 	};
223 	union {
224 		refcount_t		refcnt;
225 		struct net_bridge_vlan	*brvlan;
226 	};
227 
228 	struct br_tunnel_info		tinfo;
229 
230 	union {
231 		struct net_bridge_mcast		br_mcast_ctx;
232 		struct net_bridge_mcast_port	port_mcast_ctx;
233 	};
234 
235 	u16				msti;
236 
237 	struct list_head		vlist;
238 
239 	struct rcu_head			rcu;
240 };
241 
242 /**
243  * struct net_bridge_vlan_group
244  *
245  * @vlan_hash: VLAN entry rhashtable
246  * @vlan_list: sorted VLAN entry list
247  * @num_vlans: number of total VLAN entries
248  * @pvid: PVID VLAN id
249  * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking)
250  *
251  * IMPORTANT: Be careful when checking if there're VLAN entries using list
252  *            primitives because the bridge can have entries in its list which
253  *            are just for global context but not for filtering, i.e. they have
254  *            the master flag set but not the brentry flag. If you have to check
255  *            if there're "real" entries in the bridge please test @num_vlans
256  */
257 struct net_bridge_vlan_group {
258 	struct rhashtable		vlan_hash;
259 	struct rhashtable		tunnel_hash;
260 	struct list_head		vlan_list;
261 	u16				num_vlans;
262 	u16				pvid;
263 	u8				pvid_state;
264 };
265 
266 /* bridge fdb flags */
267 enum {
268 	BR_FDB_LOCAL,
269 	BR_FDB_STATIC,
270 	BR_FDB_STICKY,
271 	BR_FDB_ADDED_BY_USER,
272 	BR_FDB_ADDED_BY_EXT_LEARN,
273 	BR_FDB_OFFLOADED,
274 	BR_FDB_NOTIFY,
275 	BR_FDB_NOTIFY_INACTIVE,
276 	BR_FDB_LOCKED,
277 };
278 
279 struct net_bridge_fdb_key {
280 	mac_addr addr;
281 	u16 vlan_id;
282 };
283 
284 struct net_bridge_fdb_entry {
285 	struct rhash_head		rhnode;
286 	struct net_bridge_port		*dst;
287 
288 	struct net_bridge_fdb_key	key;
289 	struct hlist_node		fdb_node;
290 	unsigned long			flags;
291 
292 	/* write-heavy members should not affect lookups */
293 	unsigned long			updated ____cacheline_aligned_in_smp;
294 	unsigned long			used;
295 
296 	struct rcu_head			rcu;
297 };
298 
299 struct net_bridge_fdb_flush_desc {
300 	unsigned long			flags;
301 	unsigned long			flags_mask;
302 	int				port_ifindex;
303 	u16				vlan_id;
304 };
305 
306 #define MDB_PG_FLAGS_PERMANENT	BIT(0)
307 #define MDB_PG_FLAGS_OFFLOAD	BIT(1)
308 #define MDB_PG_FLAGS_FAST_LEAVE	BIT(2)
309 #define MDB_PG_FLAGS_STAR_EXCL	BIT(3)
310 #define MDB_PG_FLAGS_BLOCKED	BIT(4)
311 
312 #define PG_SRC_ENT_LIMIT	32
313 
314 #define BR_SGRP_F_DELETE	BIT(0)
315 #define BR_SGRP_F_SEND		BIT(1)
316 #define BR_SGRP_F_INSTALLED	BIT(2)
317 #define BR_SGRP_F_USER_ADDED	BIT(3)
318 
319 struct net_bridge_mcast_gc {
320 	struct hlist_node		gc_node;
321 	void				(*destroy)(struct net_bridge_mcast_gc *gc);
322 };
323 
324 struct net_bridge_group_src {
325 	struct hlist_node		node;
326 
327 	struct br_ip			addr;
328 	struct net_bridge_port_group	*pg;
329 	u8				flags;
330 	u8				src_query_rexmit_cnt;
331 	struct timer_list		timer;
332 
333 	struct net_bridge		*br;
334 	struct net_bridge_mcast_gc	mcast_gc;
335 	struct rcu_head			rcu;
336 };
337 
338 struct net_bridge_port_group_sg_key {
339 	struct net_bridge_port		*port;
340 	struct br_ip			addr;
341 };
342 
343 struct net_bridge_port_group {
344 	struct net_bridge_port_group __rcu *next;
345 	struct net_bridge_port_group_sg_key key;
346 	unsigned char			eth_addr[ETH_ALEN] __aligned(2);
347 	unsigned char			flags;
348 	unsigned char			filter_mode;
349 	unsigned char			grp_query_rexmit_cnt;
350 	unsigned char			rt_protocol;
351 
352 	struct hlist_head		src_list;
353 	unsigned int			src_ents;
354 	struct timer_list		timer;
355 	struct timer_list		rexmit_timer;
356 	struct hlist_node		mglist;
357 	struct rb_root			eht_set_tree;
358 	struct rb_root			eht_host_tree;
359 
360 	struct rhash_head		rhnode;
361 	struct net_bridge_mcast_gc	mcast_gc;
362 	struct rcu_head			rcu;
363 };
364 
365 struct net_bridge_mdb_entry {
366 	struct rhash_head		rhnode;
367 	struct net_bridge		*br;
368 	struct net_bridge_port_group __rcu *ports;
369 	struct br_ip			addr;
370 	bool				host_joined;
371 
372 	struct timer_list		timer;
373 	struct hlist_node		mdb_node;
374 
375 	struct net_bridge_mcast_gc	mcast_gc;
376 	struct rcu_head			rcu;
377 };
378 
379 struct net_bridge_port {
380 	struct net_bridge		*br;
381 	struct net_device		*dev;
382 	netdevice_tracker		dev_tracker;
383 	struct list_head		list;
384 
385 	unsigned long			flags;
386 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
387 	struct net_bridge_vlan_group	__rcu *vlgrp;
388 #endif
389 	struct net_bridge_port		__rcu *backup_port;
390 	u32				backup_nhid;
391 
392 	/* STP */
393 	u8				priority;
394 	u8				state;
395 	u16				port_no;
396 	unsigned char			topology_change_ack;
397 	unsigned char			config_pending;
398 	port_id				port_id;
399 	port_id				designated_port;
400 	bridge_id			designated_root;
401 	bridge_id			designated_bridge;
402 	u32				path_cost;
403 	u32				designated_cost;
404 	unsigned long			designated_age;
405 
406 	struct timer_list		forward_delay_timer;
407 	struct timer_list		hold_timer;
408 	struct timer_list		message_age_timer;
409 	struct kobject			kobj;
410 	struct rcu_head			rcu;
411 
412 	struct net_bridge_mcast_port	multicast_ctx;
413 
414 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
415 	struct bridge_mcast_stats	__percpu *mcast_stats;
416 
417 	u32				multicast_eht_hosts_limit;
418 	u32				multicast_eht_hosts_cnt;
419 	struct hlist_head		mglist;
420 #endif
421 
422 #ifdef CONFIG_SYSFS
423 	char				sysfs_name[IFNAMSIZ];
424 #endif
425 
426 #ifdef CONFIG_NET_POLL_CONTROLLER
427 	struct netpoll			*np;
428 #endif
429 #ifdef CONFIG_NET_SWITCHDEV
430 	/* Identifier used to group ports that share the same switchdev
431 	 * hardware domain.
432 	 */
433 	int				hwdom;
434 	int				offload_count;
435 	struct netdev_phys_item_id	ppid;
436 #endif
437 	u16				group_fwd_mask;
438 	u16				backup_redirected_cnt;
439 
440 	struct bridge_stp_xstats	stp_xstats;
441 };
442 
443 #define kobj_to_brport(obj)	container_of(obj, struct net_bridge_port, kobj)
444 
445 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
446 #define br_promisc_port(p) ((p)->flags & BR_PROMISC)
447 
br_port_get_rcu(const struct net_device * dev)448 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
449 {
450 	return rcu_dereference(dev->rx_handler_data);
451 }
452 
br_port_get_rtnl(const struct net_device * dev)453 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
454 {
455 	return netif_is_bridge_port(dev) ?
456 		rtnl_dereference(dev->rx_handler_data) : NULL;
457 }
458 
br_port_get_rtnl_rcu(const struct net_device * dev)459 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev)
460 {
461 	return netif_is_bridge_port(dev) ?
462 		rcu_dereference_rtnl(dev->rx_handler_data) : NULL;
463 }
464 
465 enum net_bridge_opts {
466 	BROPT_VLAN_ENABLED,
467 	BROPT_VLAN_STATS_ENABLED,
468 	BROPT_NF_CALL_IPTABLES,
469 	BROPT_NF_CALL_IP6TABLES,
470 	BROPT_NF_CALL_ARPTABLES,
471 	BROPT_GROUP_ADDR_SET,
472 	BROPT_MULTICAST_ENABLED,
473 	BROPT_MULTICAST_QUERY_USE_IFADDR,
474 	BROPT_MULTICAST_STATS_ENABLED,
475 	BROPT_HAS_IPV6_ADDR,
476 	BROPT_NEIGH_SUPPRESS_ENABLED,
477 	BROPT_MTU_SET_BY_USER,
478 	BROPT_VLAN_STATS_PER_PORT,
479 	BROPT_NO_LL_LEARN,
480 	BROPT_VLAN_BRIDGE_BINDING,
481 	BROPT_MCAST_VLAN_SNOOPING_ENABLED,
482 	BROPT_MST_ENABLED,
483 };
484 
485 struct net_bridge {
486 	spinlock_t			lock;
487 	spinlock_t			hash_lock;
488 	struct hlist_head		frame_type_list;
489 	struct net_device		*dev;
490 	unsigned long			options;
491 	/* These fields are accessed on each packet */
492 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
493 	__be16				vlan_proto;
494 	u16				default_pvid;
495 	struct net_bridge_vlan_group	__rcu *vlgrp;
496 #endif
497 
498 	struct rhashtable		fdb_hash_tbl;
499 	struct list_head		port_list;
500 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
501 	union {
502 		struct rtable		fake_rtable;
503 		struct rt6_info		fake_rt6_info;
504 	};
505 #endif
506 	u16				group_fwd_mask;
507 	u16				group_fwd_mask_required;
508 
509 	/* STP */
510 	bridge_id			designated_root;
511 	bridge_id			bridge_id;
512 	unsigned char			topology_change;
513 	unsigned char			topology_change_detected;
514 	u16				root_port;
515 	unsigned long			max_age;
516 	unsigned long			hello_time;
517 	unsigned long			forward_delay;
518 	unsigned long			ageing_time;
519 	unsigned long			bridge_max_age;
520 	unsigned long			bridge_hello_time;
521 	unsigned long			bridge_forward_delay;
522 	unsigned long			bridge_ageing_time;
523 	u32				root_path_cost;
524 
525 	u8				group_addr[ETH_ALEN];
526 
527 	enum {
528 		BR_NO_STP, 		/* no spanning tree */
529 		BR_KERNEL_STP,		/* old STP in kernel */
530 		BR_USER_STP,		/* new RSTP in userspace */
531 	} stp_enabled;
532 
533 	struct net_bridge_mcast		multicast_ctx;
534 
535 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
536 	struct bridge_mcast_stats	__percpu *mcast_stats;
537 
538 	u32				hash_max;
539 
540 	spinlock_t			multicast_lock;
541 
542 	struct rhashtable		mdb_hash_tbl;
543 	struct rhashtable		sg_port_tbl;
544 
545 	struct hlist_head		mcast_gc_list;
546 	struct hlist_head		mdb_list;
547 
548 	struct work_struct		mcast_gc_work;
549 #endif
550 
551 	struct timer_list		hello_timer;
552 	struct timer_list		tcn_timer;
553 	struct timer_list		topology_change_timer;
554 	struct delayed_work		gc_work;
555 	struct kobject			*ifobj;
556 	u32				auto_cnt;
557 
558 #ifdef CONFIG_NET_SWITCHDEV
559 	/* Counter used to make sure that hardware domains get unique
560 	 * identifiers in case a bridge spans multiple switchdev instances.
561 	 */
562 	int				last_hwdom;
563 	/* Bit mask of hardware domain numbers in use */
564 	unsigned long			busy_hwdoms;
565 #endif
566 	struct hlist_head		fdb_list;
567 
568 #if IS_ENABLED(CONFIG_BRIDGE_MRP)
569 	struct hlist_head		mrp_list;
570 #endif
571 #if IS_ENABLED(CONFIG_BRIDGE_CFM)
572 	struct hlist_head		mep_list;
573 #endif
574 };
575 
576 struct br_input_skb_cb {
577 	struct net_device *brdev;
578 
579 	u16 frag_max_size;
580 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
581 	u8 igmp;
582 	u8 mrouters_only:1;
583 #endif
584 	u8 proxyarp_replied:1;
585 	u8 src_port_isolated:1;
586 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
587 	u8 vlan_filtered:1;
588 #endif
589 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
590 	u8 br_netfilter_broute:1;
591 #endif
592 
593 #ifdef CONFIG_NET_SWITCHDEV
594 	/* Set if TX data plane offloading is used towards at least one
595 	 * hardware domain.
596 	 */
597 	u8 tx_fwd_offload:1;
598 	/* The switchdev hardware domain from which this packet was received.
599 	 * If skb->offload_fwd_mark was set, then this packet was already
600 	 * forwarded by hardware to the other ports in the source hardware
601 	 * domain, otherwise it wasn't.
602 	 */
603 	int src_hwdom;
604 	/* Bit mask of hardware domains towards this packet has already been
605 	 * transmitted using the TX data plane offload.
606 	 */
607 	unsigned long fwd_hwdoms;
608 #endif
609 
610 	u32 backup_nhid;
611 };
612 
613 #define BR_INPUT_SKB_CB(__skb)	((struct br_input_skb_cb *)(__skb)->cb)
614 
615 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
616 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)	(BR_INPUT_SKB_CB(__skb)->mrouters_only)
617 #else
618 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)	(0)
619 #endif
620 
621 #define br_printk(level, br, format, args...)	\
622 	printk(level "%s: " format, (br)->dev->name, ##args)
623 
624 #define br_err(__br, format, args...)			\
625 	br_printk(KERN_ERR, __br, format, ##args)
626 #define br_warn(__br, format, args...)			\
627 	br_printk(KERN_WARNING, __br, format, ##args)
628 #define br_notice(__br, format, args...)		\
629 	br_printk(KERN_NOTICE, __br, format, ##args)
630 #define br_info(__br, format, args...)			\
631 	br_printk(KERN_INFO, __br, format, ##args)
632 
633 #define br_debug(br, format, args...)			\
634 	pr_debug("%s: " format,  (br)->dev->name, ##args)
635 
636 /* called under bridge lock */
br_is_root_bridge(const struct net_bridge * br)637 static inline int br_is_root_bridge(const struct net_bridge *br)
638 {
639 	return !memcmp(&br->bridge_id, &br->designated_root, 8);
640 }
641 
642 /* check if a VLAN entry is global */
br_vlan_is_master(const struct net_bridge_vlan * v)643 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
644 {
645 	return v->flags & BRIDGE_VLAN_INFO_MASTER;
646 }
647 
648 /* check if a VLAN entry is used by the bridge */
br_vlan_is_brentry(const struct net_bridge_vlan * v)649 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
650 {
651 	return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
652 }
653 
654 /* 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)655 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
656 {
657 	if (br_vlan_is_master(v)) {
658 		if (br_vlan_is_brentry(v))
659 			return true;
660 		else
661 			return false;
662 	}
663 
664 	return true;
665 }
666 
nbp_state_should_learn(const struct net_bridge_port * p)667 static inline bool nbp_state_should_learn(const struct net_bridge_port *p)
668 {
669 	return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING;
670 }
671 
br_vlan_valid_id(u16 vid,struct netlink_ext_ack * extack)672 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack)
673 {
674 	bool ret = vid > 0 && vid < VLAN_VID_MASK;
675 
676 	if (!ret)
677 		NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid");
678 
679 	return ret;
680 }
681 
br_vlan_valid_range(const struct bridge_vlan_info * cur,const struct bridge_vlan_info * last,struct netlink_ext_ack * extack)682 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur,
683 				       const struct bridge_vlan_info *last,
684 				       struct netlink_ext_ack *extack)
685 {
686 	/* pvid flag is not allowed in ranges */
687 	if (cur->flags & BRIDGE_VLAN_INFO_PVID) {
688 		NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range");
689 		return false;
690 	}
691 
692 	/* when cur is the range end, check if:
693 	 *  - it has range start flag
694 	 *  - range ids are invalid (end is equal to or before start)
695 	 */
696 	if (last) {
697 		if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
698 			NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one");
699 			return false;
700 		} else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) {
701 			NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing");
702 			return false;
703 		} else if (cur->vid <= last->vid) {
704 			NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id");
705 			return false;
706 		}
707 	}
708 
709 	/* check for required range flags */
710 	if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN |
711 			    BRIDGE_VLAN_INFO_RANGE_END))) {
712 		NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing");
713 		return false;
714 	}
715 
716 	return true;
717 }
718 
br_vlan_multicast_router(const struct net_bridge_vlan * v)719 static inline u8 br_vlan_multicast_router(const struct net_bridge_vlan *v)
720 {
721 	u8 mcast_router = MDB_RTR_TYPE_DISABLED;
722 
723 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
724 	if (!br_vlan_is_master(v))
725 		mcast_router = v->port_mcast_ctx.multicast_router;
726 	else
727 		mcast_router = v->br_mcast_ctx.multicast_router;
728 #endif
729 
730 	return mcast_router;
731 }
732 
br_afspec_cmd_to_rtm(int cmd)733 static inline int br_afspec_cmd_to_rtm(int cmd)
734 {
735 	switch (cmd) {
736 	case RTM_SETLINK:
737 		return RTM_NEWVLAN;
738 	case RTM_DELLINK:
739 		return RTM_DELVLAN;
740 	}
741 
742 	return 0;
743 }
744 
br_opt_get(const struct net_bridge * br,enum net_bridge_opts opt)745 static inline int br_opt_get(const struct net_bridge *br,
746 			     enum net_bridge_opts opt)
747 {
748 	return test_bit(opt, &br->options);
749 }
750 
751 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
752 		      struct netlink_ext_ack *extack);
753 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt);
754 int br_boolopt_multi_toggle(struct net_bridge *br,
755 			    struct br_boolopt_multi *bm,
756 			    struct netlink_ext_ack *extack);
757 void br_boolopt_multi_get(const struct net_bridge *br,
758 			  struct br_boolopt_multi *bm);
759 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on);
760 
761 #if IS_ENABLED(CONFIG_NET_TC_SKB_EXT)
br_tc_skb_miss_set(struct sk_buff * skb,bool miss)762 static inline void br_tc_skb_miss_set(struct sk_buff *skb, bool miss)
763 {
764 	struct tc_skb_ext *ext;
765 
766 	if (!tc_skb_ext_tc_enabled())
767 		return;
768 
769 	ext = skb_ext_find(skb, TC_SKB_EXT);
770 	if (ext) {
771 		ext->l2_miss = miss;
772 		return;
773 	}
774 	if (!miss)
775 		return;
776 	ext = tc_skb_ext_alloc(skb);
777 	if (!ext)
778 		return;
779 	ext->l2_miss = true;
780 }
781 #else
br_tc_skb_miss_set(struct sk_buff * skb,bool miss)782 static inline void br_tc_skb_miss_set(struct sk_buff *skb, bool miss)
783 {
784 }
785 #endif
786 
787 /* br_device.c */
788 void br_dev_setup(struct net_device *dev);
789 void br_dev_delete(struct net_device *dev, struct list_head *list);
790 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
791 #ifdef CONFIG_NET_POLL_CONTROLLER
br_netpoll_send_skb(const struct net_bridge_port * p,struct sk_buff * skb)792 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
793 				       struct sk_buff *skb)
794 {
795 	netpoll_send_skb(p->np, skb);
796 }
797 
798 int br_netpoll_enable(struct net_bridge_port *p);
799 void br_netpoll_disable(struct net_bridge_port *p);
800 #else
br_netpoll_send_skb(const struct net_bridge_port * p,struct sk_buff * skb)801 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
802 				       struct sk_buff *skb)
803 {
804 }
805 
br_netpoll_enable(struct net_bridge_port * p)806 static inline int br_netpoll_enable(struct net_bridge_port *p)
807 {
808 	return 0;
809 }
810 
br_netpoll_disable(struct net_bridge_port * p)811 static inline void br_netpoll_disable(struct net_bridge_port *p)
812 {
813 }
814 #endif
815 
816 /* br_fdb.c */
817 #define FDB_FLUSH_IGNORED_NDM_FLAGS (NTF_MASTER | NTF_SELF)
818 #define FDB_FLUSH_ALLOWED_NDM_STATES (NUD_PERMANENT | NUD_NOARP)
819 #define FDB_FLUSH_ALLOWED_NDM_FLAGS (NTF_USE | NTF_EXT_LEARNED | \
820 				     NTF_STICKY | NTF_OFFLOADED)
821 
822 int br_fdb_init(void);
823 void br_fdb_fini(void);
824 int br_fdb_hash_init(struct net_bridge *br);
825 void br_fdb_hash_fini(struct net_bridge *br);
826 void br_fdb_flush(struct net_bridge *br,
827 		  const struct net_bridge_fdb_flush_desc *desc);
828 void br_fdb_find_delete_local(struct net_bridge *br,
829 			      const struct net_bridge_port *p,
830 			      const unsigned char *addr, u16 vid);
831 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
832 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
833 void br_fdb_cleanup(struct work_struct *work);
834 void br_fdb_delete_by_port(struct net_bridge *br,
835 			   const struct net_bridge_port *p, u16 vid, int do_all);
836 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br,
837 					     const unsigned char *addr,
838 					     __u16 vid);
839 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
840 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
841 		   unsigned long off);
842 int br_fdb_add_local(struct net_bridge *br, struct net_bridge_port *source,
843 		     const unsigned char *addr, u16 vid);
844 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
845 		   const unsigned char *addr, u16 vid, unsigned long flags);
846 
847 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
848 		  struct net_device *dev, const unsigned char *addr, u16 vid,
849 		  struct netlink_ext_ack *extack);
850 int br_fdb_delete_bulk(struct ndmsg *ndm, struct nlattr *tb[],
851 		       struct net_device *dev, u16 vid,
852 		       struct netlink_ext_ack *extack);
853 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
854 	       const unsigned char *addr, u16 vid, u16 nlh_flags,
855 	       struct netlink_ext_ack *extack);
856 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
857 		struct net_device *dev, struct net_device *fdev, int *idx);
858 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev,
859 	       const unsigned char *addr, u16 vid, u32 portid, u32 seq,
860 	       struct netlink_ext_ack *extack);
861 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
862 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
863 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
864 			      const unsigned char *addr, u16 vid,
865 			      bool locked, bool swdev_notify);
866 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
867 			      const unsigned char *addr, u16 vid,
868 			      bool swdev_notify);
869 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p,
870 			  const unsigned char *addr, u16 vid, bool offloaded);
871 
872 /* br_forward.c */
873 enum br_pkt_type {
874 	BR_PKT_UNICAST,
875 	BR_PKT_MULTICAST,
876 	BR_PKT_BROADCAST
877 };
878 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
879 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
880 		bool local_rcv, bool local_orig);
881 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
882 void br_flood(struct net_bridge *br, struct sk_buff *skb,
883 	      enum br_pkt_type pkt_type, bool local_rcv, bool local_orig,
884 	      u16 vid);
885 
886 /* 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)887 static inline bool br_skb_isolated(const struct net_bridge_port *to,
888 				   const struct sk_buff *skb)
889 {
890 	return BR_INPUT_SKB_CB(skb)->src_port_isolated &&
891 	       (to->flags & BR_ISOLATED);
892 }
893 
894 /* br_if.c */
895 void br_port_carrier_check(struct net_bridge_port *p, bool *notified);
896 int br_add_bridge(struct net *net, const char *name);
897 int br_del_bridge(struct net *net, const char *name);
898 int br_add_if(struct net_bridge *br, struct net_device *dev,
899 	      struct netlink_ext_ack *extack);
900 int br_del_if(struct net_bridge *br, struct net_device *dev);
901 void br_mtu_auto_adjust(struct net_bridge *br);
902 netdev_features_t br_features_recompute(struct net_bridge *br,
903 					netdev_features_t features);
904 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
905 void br_manage_promisc(struct net_bridge *br);
906 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev);
907 
908 /* br_input.c */
909 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
910 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev);
911 
912 struct br_frame_type {
913 	__be16			type;
914 	int			(*frame_handler)(struct net_bridge_port *port,
915 						 struct sk_buff *skb);
916 	struct hlist_node	list;
917 };
918 
919 void br_add_frame(struct net_bridge *br, struct br_frame_type *ft);
920 void br_del_frame(struct net_bridge *br, struct br_frame_type *ft);
921 
br_rx_handler_check_rcu(const struct net_device * dev)922 static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
923 {
924 	return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev);
925 }
926 
br_rx_handler_check_rtnl(const struct net_device * dev)927 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev)
928 {
929 	return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev);
930 }
931 
br_port_get_check_rcu(const struct net_device * dev)932 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
933 {
934 	return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
935 }
936 
937 static inline struct net_bridge_port *
br_port_get_check_rtnl(const struct net_device * dev)938 br_port_get_check_rtnl(const struct net_device *dev)
939 {
940 	return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL;
941 }
942 
943 /* br_ioctl.c */
944 int br_dev_siocdevprivate(struct net_device *dev, struct ifreq *rq,
945 			  void __user *data, int cmd);
946 int br_ioctl_stub(struct net *net, struct net_bridge *br, unsigned int cmd,
947 		  struct ifreq *ifr, void __user *uarg);
948 
949 /* br_multicast.c */
950 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
951 int br_multicast_rcv(struct net_bridge_mcast **brmctx,
952 		     struct net_bridge_mcast_port **pmctx,
953 		     struct net_bridge_vlan *vlan,
954 		     struct sk_buff *skb, u16 vid);
955 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx,
956 					struct sk_buff *skb, u16 vid);
957 int br_multicast_add_port(struct net_bridge_port *port);
958 void br_multicast_del_port(struct net_bridge_port *port);
959 void br_multicast_enable_port(struct net_bridge_port *port);
960 void br_multicast_disable_port(struct net_bridge_port *port);
961 void br_multicast_init(struct net_bridge *br);
962 void br_multicast_join_snoopers(struct net_bridge *br);
963 void br_multicast_leave_snoopers(struct net_bridge *br);
964 void br_multicast_open(struct net_bridge *br);
965 void br_multicast_stop(struct net_bridge *br);
966 void br_multicast_dev_del(struct net_bridge *br);
967 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, struct sk_buff *skb,
968 			struct net_bridge_mcast *brmctx,
969 			bool local_rcv, bool local_orig);
970 int br_multicast_set_router(struct net_bridge_mcast *brmctx, unsigned long val);
971 int br_multicast_set_port_router(struct net_bridge_mcast_port *pmctx,
972 				 unsigned long val);
973 int br_multicast_set_vlan_router(struct net_bridge_vlan *v, u8 mcast_router);
974 int br_multicast_toggle(struct net_bridge *br, unsigned long val,
975 			struct netlink_ext_ack *extack);
976 int br_multicast_set_querier(struct net_bridge_mcast *brmctx, unsigned long val);
977 int br_multicast_set_igmp_version(struct net_bridge_mcast *brmctx,
978 				  unsigned long val);
979 #if IS_ENABLED(CONFIG_IPV6)
980 int br_multicast_set_mld_version(struct net_bridge_mcast *brmctx,
981 				 unsigned long val);
982 #endif
983 struct net_bridge_mdb_entry *
984 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst);
985 struct net_bridge_mdb_entry *
986 br_multicast_new_group(struct net_bridge *br, struct br_ip *group);
987 struct net_bridge_port_group *
988 br_multicast_new_port_group(struct net_bridge_port *port,
989 			    const struct br_ip *group,
990 			    struct net_bridge_port_group __rcu *next,
991 			    unsigned char flags, const unsigned char *src,
992 			    u8 filter_mode, u8 rt_protocol,
993 			    struct netlink_ext_ack *extack);
994 void br_multicast_del_port_group(struct net_bridge_port_group *p);
995 int br_mdb_hash_init(struct net_bridge *br);
996 void br_mdb_hash_fini(struct net_bridge *br);
997 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp,
998 		   struct net_bridge_port_group *pg, int type);
999 void br_rtr_notify(struct net_device *dev, struct net_bridge_mcast_port *pmctx,
1000 		   int type);
1001 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp,
1002 			 struct net_bridge_port_group *pg,
1003 			 struct net_bridge_port_group __rcu **pp);
1004 void br_multicast_count(struct net_bridge *br,
1005 			const struct net_bridge_port *p,
1006 			const struct sk_buff *skb, u8 type, u8 dir);
1007 int br_multicast_init_stats(struct net_bridge *br);
1008 void br_multicast_uninit_stats(struct net_bridge *br);
1009 void br_multicast_get_stats(const struct net_bridge *br,
1010 			    const struct net_bridge_port *p,
1011 			    struct br_mcast_stats *dest);
1012 u32 br_multicast_ngroups_get(const struct net_bridge_mcast_port *pmctx);
1013 void br_multicast_ngroups_set_max(struct net_bridge_mcast_port *pmctx, u32 max);
1014 u32 br_multicast_ngroups_get_max(const struct net_bridge_mcast_port *pmctx);
1015 int br_mdb_add(struct net_device *dev, struct nlattr *tb[], u16 nlmsg_flags,
1016 	       struct netlink_ext_ack *extack);
1017 int br_mdb_del(struct net_device *dev, struct nlattr *tb[],
1018 	       struct netlink_ext_ack *extack);
1019 int br_mdb_dump(struct net_device *dev, struct sk_buff *skb,
1020 		struct netlink_callback *cb);
1021 void br_multicast_host_join(const struct net_bridge_mcast *brmctx,
1022 			    struct net_bridge_mdb_entry *mp, bool notify);
1023 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify);
1024 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg,
1025 				     u8 filter_mode);
1026 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp,
1027 				       struct net_bridge_port_group *sg);
1028 struct net_bridge_group_src *
1029 br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip);
1030 struct net_bridge_group_src *
1031 br_multicast_new_group_src(struct net_bridge_port_group *pg,
1032 			   struct br_ip *src_ip);
1033 void __br_multicast_del_group_src(struct net_bridge_group_src *src);
1034 void br_multicast_del_group_src(struct net_bridge_group_src *src,
1035 				bool fastleave);
1036 void br_multicast_ctx_init(struct net_bridge *br,
1037 			   struct net_bridge_vlan *vlan,
1038 			   struct net_bridge_mcast *brmctx);
1039 void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx);
1040 void br_multicast_port_ctx_init(struct net_bridge_port *port,
1041 				struct net_bridge_vlan *vlan,
1042 				struct net_bridge_mcast_port *pmctx);
1043 void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx);
1044 void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on);
1045 int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on,
1046 				      struct netlink_ext_ack *extack);
1047 bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on);
1048 
1049 int br_rports_fill_info(struct sk_buff *skb,
1050 			const struct net_bridge_mcast *brmctx);
1051 int br_multicast_dump_querier_state(struct sk_buff *skb,
1052 				    const struct net_bridge_mcast *brmctx,
1053 				    int nest_attr);
1054 size_t br_multicast_querier_state_size(void);
1055 size_t br_rports_size(const struct net_bridge_mcast *brmctx);
1056 void br_multicast_set_query_intvl(struct net_bridge_mcast *brmctx,
1057 				  unsigned long val);
1058 void br_multicast_set_startup_query_intvl(struct net_bridge_mcast *brmctx,
1059 					  unsigned long val);
1060 
br_group_is_l2(const struct br_ip * group)1061 static inline bool br_group_is_l2(const struct br_ip *group)
1062 {
1063 	return group->proto == 0;
1064 }
1065 
1066 #define mlock_dereference(X, br) \
1067 	rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
1068 
1069 static inline struct hlist_node *
br_multicast_get_first_rport_node(struct net_bridge_mcast * brmctx,struct sk_buff * skb)1070 br_multicast_get_first_rport_node(struct net_bridge_mcast *brmctx,
1071 				  struct sk_buff *skb)
1072 {
1073 #if IS_ENABLED(CONFIG_IPV6)
1074 	if (skb->protocol == htons(ETH_P_IPV6))
1075 		return rcu_dereference(hlist_first_rcu(&brmctx->ip6_mc_router_list));
1076 #endif
1077 	return rcu_dereference(hlist_first_rcu(&brmctx->ip4_mc_router_list));
1078 }
1079 
1080 static inline struct net_bridge_port *
br_multicast_rport_from_node_skb(struct hlist_node * rp,struct sk_buff * skb)1081 br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb)
1082 {
1083 	struct net_bridge_mcast_port *mctx;
1084 
1085 #if IS_ENABLED(CONFIG_IPV6)
1086 	if (skb->protocol == htons(ETH_P_IPV6))
1087 		mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port,
1088 					ip6_rlist);
1089 	else
1090 #endif
1091 		mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port,
1092 					ip4_rlist);
1093 
1094 	if (mctx)
1095 		return mctx->port;
1096 	else
1097 		return NULL;
1098 }
1099 
br_ip4_multicast_is_router(struct net_bridge_mcast * brmctx)1100 static inline bool br_ip4_multicast_is_router(struct net_bridge_mcast *brmctx)
1101 {
1102 	return timer_pending(&brmctx->ip4_mc_router_timer);
1103 }
1104 
br_ip6_multicast_is_router(struct net_bridge_mcast * brmctx)1105 static inline bool br_ip6_multicast_is_router(struct net_bridge_mcast *brmctx)
1106 {
1107 #if IS_ENABLED(CONFIG_IPV6)
1108 	return timer_pending(&brmctx->ip6_mc_router_timer);
1109 #else
1110 	return false;
1111 #endif
1112 }
1113 
1114 static inline bool
br_multicast_is_router(struct net_bridge_mcast * brmctx,struct sk_buff * skb)1115 br_multicast_is_router(struct net_bridge_mcast *brmctx, struct sk_buff *skb)
1116 {
1117 	switch (brmctx->multicast_router) {
1118 	case MDB_RTR_TYPE_PERM:
1119 		return true;
1120 	case MDB_RTR_TYPE_TEMP_QUERY:
1121 		if (skb) {
1122 			if (skb->protocol == htons(ETH_P_IP))
1123 				return br_ip4_multicast_is_router(brmctx);
1124 			else if (skb->protocol == htons(ETH_P_IPV6))
1125 				return br_ip6_multicast_is_router(brmctx);
1126 		} else {
1127 			return br_ip4_multicast_is_router(brmctx) ||
1128 			       br_ip6_multicast_is_router(brmctx);
1129 		}
1130 		fallthrough;
1131 	default:
1132 		return false;
1133 	}
1134 }
1135 
1136 static inline bool
__br_multicast_querier_exists(struct net_bridge_mcast * brmctx,struct bridge_mcast_other_query * querier,const bool is_ipv6)1137 __br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1138 			      struct bridge_mcast_other_query *querier,
1139 			      const bool is_ipv6)
1140 {
1141 	bool own_querier_enabled;
1142 
1143 	if (brmctx->multicast_querier) {
1144 		if (is_ipv6 && !br_opt_get(brmctx->br, BROPT_HAS_IPV6_ADDR))
1145 			own_querier_enabled = false;
1146 		else
1147 			own_querier_enabled = true;
1148 	} else {
1149 		own_querier_enabled = false;
1150 	}
1151 
1152 	return !timer_pending(&querier->delay_timer) &&
1153 	       (own_querier_enabled || timer_pending(&querier->timer));
1154 }
1155 
br_multicast_querier_exists(struct net_bridge_mcast * brmctx,struct ethhdr * eth,const struct net_bridge_mdb_entry * mdb)1156 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1157 					       struct ethhdr *eth,
1158 					       const struct net_bridge_mdb_entry *mdb)
1159 {
1160 	switch (eth->h_proto) {
1161 	case (htons(ETH_P_IP)):
1162 		return __br_multicast_querier_exists(brmctx,
1163 			&brmctx->ip4_other_query, false);
1164 #if IS_ENABLED(CONFIG_IPV6)
1165 	case (htons(ETH_P_IPV6)):
1166 		return __br_multicast_querier_exists(brmctx,
1167 			&brmctx->ip6_other_query, true);
1168 #endif
1169 	default:
1170 		return !!mdb && br_group_is_l2(&mdb->addr);
1171 	}
1172 }
1173 
br_multicast_is_star_g(const struct br_ip * ip)1174 static inline bool br_multicast_is_star_g(const struct br_ip *ip)
1175 {
1176 	switch (ip->proto) {
1177 	case htons(ETH_P_IP):
1178 		return ipv4_is_zeronet(ip->src.ip4);
1179 #if IS_ENABLED(CONFIG_IPV6)
1180 	case htons(ETH_P_IPV6):
1181 		return ipv6_addr_any(&ip->src.ip6);
1182 #endif
1183 	default:
1184 		return false;
1185 	}
1186 }
1187 
1188 static inline bool
br_multicast_should_handle_mode(const struct net_bridge_mcast * brmctx,__be16 proto)1189 br_multicast_should_handle_mode(const struct net_bridge_mcast *brmctx,
1190 				__be16 proto)
1191 {
1192 	switch (proto) {
1193 	case htons(ETH_P_IP):
1194 		return !!(brmctx->multicast_igmp_version == 3);
1195 #if IS_ENABLED(CONFIG_IPV6)
1196 	case htons(ETH_P_IPV6):
1197 		return !!(brmctx->multicast_mld_version == 2);
1198 #endif
1199 	default:
1200 		return false;
1201 	}
1202 }
1203 
br_multicast_igmp_type(const struct sk_buff * skb)1204 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
1205 {
1206 	return BR_INPUT_SKB_CB(skb)->igmp;
1207 }
1208 
br_multicast_lmqt(const struct net_bridge_mcast * brmctx)1209 static inline unsigned long br_multicast_lmqt(const struct net_bridge_mcast *brmctx)
1210 {
1211 	return brmctx->multicast_last_member_interval *
1212 	       brmctx->multicast_last_member_count;
1213 }
1214 
br_multicast_gmi(const struct net_bridge_mcast * brmctx)1215 static inline unsigned long br_multicast_gmi(const struct net_bridge_mcast *brmctx)
1216 {
1217 	return brmctx->multicast_membership_interval;
1218 }
1219 
1220 static inline bool
br_multicast_ctx_is_vlan(const struct net_bridge_mcast * brmctx)1221 br_multicast_ctx_is_vlan(const struct net_bridge_mcast *brmctx)
1222 {
1223 	return !!brmctx->vlan;
1224 }
1225 
1226 static inline bool
br_multicast_port_ctx_is_vlan(const struct net_bridge_mcast_port * pmctx)1227 br_multicast_port_ctx_is_vlan(const struct net_bridge_mcast_port *pmctx)
1228 {
1229 	return !!pmctx->vlan;
1230 }
1231 
1232 static inline struct net_bridge_mcast *
br_multicast_port_ctx_get_global(const struct net_bridge_mcast_port * pmctx)1233 br_multicast_port_ctx_get_global(const struct net_bridge_mcast_port *pmctx)
1234 {
1235 	if (!br_multicast_port_ctx_is_vlan(pmctx))
1236 		return &pmctx->port->br->multicast_ctx;
1237 	else
1238 		return &pmctx->vlan->brvlan->br_mcast_ctx;
1239 }
1240 
1241 static inline bool
br_multicast_ctx_vlan_global_disabled(const struct net_bridge_mcast * brmctx)1242 br_multicast_ctx_vlan_global_disabled(const struct net_bridge_mcast *brmctx)
1243 {
1244 	return br_multicast_ctx_is_vlan(brmctx) &&
1245 	       (!br_opt_get(brmctx->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) ||
1246 		!(brmctx->vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED));
1247 }
1248 
1249 static inline bool
br_multicast_ctx_vlan_disabled(const struct net_bridge_mcast * brmctx)1250 br_multicast_ctx_vlan_disabled(const struct net_bridge_mcast *brmctx)
1251 {
1252 	return br_multicast_ctx_is_vlan(brmctx) &&
1253 	       !(brmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED);
1254 }
1255 
1256 static inline bool
br_multicast_port_ctx_vlan_disabled(const struct net_bridge_mcast_port * pmctx)1257 br_multicast_port_ctx_vlan_disabled(const struct net_bridge_mcast_port *pmctx)
1258 {
1259 	return br_multicast_port_ctx_is_vlan(pmctx) &&
1260 	       !(pmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED);
1261 }
1262 
1263 static inline bool
br_multicast_port_ctx_state_disabled(const struct net_bridge_mcast_port * pmctx)1264 br_multicast_port_ctx_state_disabled(const struct net_bridge_mcast_port *pmctx)
1265 {
1266 	return pmctx->port->state == BR_STATE_DISABLED ||
1267 	       (br_multicast_port_ctx_is_vlan(pmctx) &&
1268 		(br_multicast_port_ctx_vlan_disabled(pmctx) ||
1269 		 pmctx->vlan->state == BR_STATE_DISABLED));
1270 }
1271 
1272 static inline bool
br_multicast_port_ctx_state_stopped(const struct net_bridge_mcast_port * pmctx)1273 br_multicast_port_ctx_state_stopped(const struct net_bridge_mcast_port *pmctx)
1274 {
1275 	return br_multicast_port_ctx_state_disabled(pmctx) ||
1276 	       pmctx->port->state == BR_STATE_BLOCKING ||
1277 	       (br_multicast_port_ctx_is_vlan(pmctx) &&
1278 		pmctx->vlan->state == BR_STATE_BLOCKING);
1279 }
1280 
1281 static inline bool
br_rports_have_mc_router(const struct net_bridge_mcast * brmctx)1282 br_rports_have_mc_router(const struct net_bridge_mcast *brmctx)
1283 {
1284 #if IS_ENABLED(CONFIG_IPV6)
1285 	return !hlist_empty(&brmctx->ip4_mc_router_list) ||
1286 	       !hlist_empty(&brmctx->ip6_mc_router_list);
1287 #else
1288 	return !hlist_empty(&brmctx->ip4_mc_router_list);
1289 #endif
1290 }
1291 
1292 static inline bool
br_multicast_ctx_options_equal(const struct net_bridge_mcast * brmctx1,const struct net_bridge_mcast * brmctx2)1293 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1,
1294 			       const struct net_bridge_mcast *brmctx2)
1295 {
1296 	return brmctx1->multicast_igmp_version ==
1297 	       brmctx2->multicast_igmp_version &&
1298 	       brmctx1->multicast_last_member_count ==
1299 	       brmctx2->multicast_last_member_count &&
1300 	       brmctx1->multicast_startup_query_count ==
1301 	       brmctx2->multicast_startup_query_count &&
1302 	       brmctx1->multicast_last_member_interval ==
1303 	       brmctx2->multicast_last_member_interval &&
1304 	       brmctx1->multicast_membership_interval ==
1305 	       brmctx2->multicast_membership_interval &&
1306 	       brmctx1->multicast_querier_interval ==
1307 	       brmctx2->multicast_querier_interval &&
1308 	       brmctx1->multicast_query_interval ==
1309 	       brmctx2->multicast_query_interval &&
1310 	       brmctx1->multicast_query_response_interval ==
1311 	       brmctx2->multicast_query_response_interval &&
1312 	       brmctx1->multicast_startup_query_interval ==
1313 	       brmctx2->multicast_startup_query_interval &&
1314 	       brmctx1->multicast_querier == brmctx2->multicast_querier &&
1315 	       brmctx1->multicast_router == brmctx2->multicast_router &&
1316 	       !br_rports_have_mc_router(brmctx1) &&
1317 	       !br_rports_have_mc_router(brmctx2) &&
1318 #if IS_ENABLED(CONFIG_IPV6)
1319 	       brmctx1->multicast_mld_version ==
1320 	       brmctx2->multicast_mld_version &&
1321 #endif
1322 	       true;
1323 }
1324 
1325 static inline bool
br_multicast_ctx_matches_vlan_snooping(const struct net_bridge_mcast * brmctx)1326 br_multicast_ctx_matches_vlan_snooping(const struct net_bridge_mcast *brmctx)
1327 {
1328 	bool vlan_snooping_enabled;
1329 
1330 	vlan_snooping_enabled = !!br_opt_get(brmctx->br,
1331 					     BROPT_MCAST_VLAN_SNOOPING_ENABLED);
1332 
1333 	return !!(vlan_snooping_enabled == br_multicast_ctx_is_vlan(brmctx));
1334 }
1335 #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)1336 static inline int br_multicast_rcv(struct net_bridge_mcast **brmctx,
1337 				   struct net_bridge_mcast_port **pmctx,
1338 				   struct net_bridge_vlan *vlan,
1339 				   struct sk_buff *skb,
1340 				   u16 vid)
1341 {
1342 	return 0;
1343 }
1344 
br_mdb_get(struct net_bridge_mcast * brmctx,struct sk_buff * skb,u16 vid)1345 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx,
1346 						      struct sk_buff *skb, u16 vid)
1347 {
1348 	return NULL;
1349 }
1350 
br_multicast_add_port(struct net_bridge_port * port)1351 static inline int br_multicast_add_port(struct net_bridge_port *port)
1352 {
1353 	return 0;
1354 }
1355 
br_multicast_del_port(struct net_bridge_port * port)1356 static inline void br_multicast_del_port(struct net_bridge_port *port)
1357 {
1358 }
1359 
br_multicast_enable_port(struct net_bridge_port * port)1360 static inline void br_multicast_enable_port(struct net_bridge_port *port)
1361 {
1362 }
1363 
br_multicast_disable_port(struct net_bridge_port * port)1364 static inline void br_multicast_disable_port(struct net_bridge_port *port)
1365 {
1366 }
1367 
br_multicast_init(struct net_bridge * br)1368 static inline void br_multicast_init(struct net_bridge *br)
1369 {
1370 }
1371 
br_multicast_join_snoopers(struct net_bridge * br)1372 static inline void br_multicast_join_snoopers(struct net_bridge *br)
1373 {
1374 }
1375 
br_multicast_leave_snoopers(struct net_bridge * br)1376 static inline void br_multicast_leave_snoopers(struct net_bridge *br)
1377 {
1378 }
1379 
br_multicast_open(struct net_bridge * br)1380 static inline void br_multicast_open(struct net_bridge *br)
1381 {
1382 }
1383 
br_multicast_stop(struct net_bridge * br)1384 static inline void br_multicast_stop(struct net_bridge *br)
1385 {
1386 }
1387 
br_multicast_dev_del(struct net_bridge * br)1388 static inline void br_multicast_dev_del(struct net_bridge *br)
1389 {
1390 }
1391 
br_multicast_flood(struct net_bridge_mdb_entry * mdst,struct sk_buff * skb,struct net_bridge_mcast * brmctx,bool local_rcv,bool local_orig)1392 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
1393 				      struct sk_buff *skb,
1394 				      struct net_bridge_mcast *brmctx,
1395 				      bool local_rcv, bool local_orig)
1396 {
1397 }
1398 
br_multicast_is_router(struct net_bridge_mcast * brmctx,struct sk_buff * skb)1399 static inline bool br_multicast_is_router(struct net_bridge_mcast *brmctx,
1400 					  struct sk_buff *skb)
1401 {
1402 	return false;
1403 }
1404 
br_multicast_querier_exists(struct net_bridge_mcast * brmctx,struct ethhdr * eth,const struct net_bridge_mdb_entry * mdb)1405 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1406 					       struct ethhdr *eth,
1407 					       const struct net_bridge_mdb_entry *mdb)
1408 {
1409 	return false;
1410 }
1411 
br_mdb_add(struct net_device * dev,struct nlattr * tb[],u16 nlmsg_flags,struct netlink_ext_ack * extack)1412 static inline int br_mdb_add(struct net_device *dev, struct nlattr *tb[],
1413 			     u16 nlmsg_flags, struct netlink_ext_ack *extack)
1414 {
1415 	return -EOPNOTSUPP;
1416 }
1417 
br_mdb_del(struct net_device * dev,struct nlattr * tb[],struct netlink_ext_ack * extack)1418 static inline int br_mdb_del(struct net_device *dev, struct nlattr *tb[],
1419 			     struct netlink_ext_ack *extack)
1420 {
1421 	return -EOPNOTSUPP;
1422 }
1423 
br_mdb_dump(struct net_device * dev,struct sk_buff * skb,struct netlink_callback * cb)1424 static inline int br_mdb_dump(struct net_device *dev, struct sk_buff *skb,
1425 			      struct netlink_callback *cb)
1426 {
1427 	return 0;
1428 }
1429 
br_mdb_hash_init(struct net_bridge * br)1430 static inline int br_mdb_hash_init(struct net_bridge *br)
1431 {
1432 	return 0;
1433 }
1434 
br_mdb_hash_fini(struct net_bridge * br)1435 static inline void br_mdb_hash_fini(struct net_bridge *br)
1436 {
1437 }
1438 
br_multicast_count(struct net_bridge * br,const struct net_bridge_port * p,const struct sk_buff * skb,u8 type,u8 dir)1439 static inline void br_multicast_count(struct net_bridge *br,
1440 				      const struct net_bridge_port *p,
1441 				      const struct sk_buff *skb,
1442 				      u8 type, u8 dir)
1443 {
1444 }
1445 
br_multicast_init_stats(struct net_bridge * br)1446 static inline int br_multicast_init_stats(struct net_bridge *br)
1447 {
1448 	return 0;
1449 }
1450 
br_multicast_uninit_stats(struct net_bridge * br)1451 static inline void br_multicast_uninit_stats(struct net_bridge *br)
1452 {
1453 }
1454 
br_multicast_igmp_type(const struct sk_buff * skb)1455 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
1456 {
1457 	return 0;
1458 }
1459 
br_multicast_ctx_init(struct net_bridge * br,struct net_bridge_vlan * vlan,struct net_bridge_mcast * brmctx)1460 static inline void br_multicast_ctx_init(struct net_bridge *br,
1461 					 struct net_bridge_vlan *vlan,
1462 					 struct net_bridge_mcast *brmctx)
1463 {
1464 }
1465 
br_multicast_ctx_deinit(struct net_bridge_mcast * brmctx)1466 static inline void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx)
1467 {
1468 }
1469 
br_multicast_port_ctx_init(struct net_bridge_port * port,struct net_bridge_vlan * vlan,struct net_bridge_mcast_port * pmctx)1470 static inline void br_multicast_port_ctx_init(struct net_bridge_port *port,
1471 					      struct net_bridge_vlan *vlan,
1472 					      struct net_bridge_mcast_port *pmctx)
1473 {
1474 }
1475 
br_multicast_port_ctx_deinit(struct net_bridge_mcast_port * pmctx)1476 static inline void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx)
1477 {
1478 }
1479 
br_multicast_toggle_one_vlan(struct net_bridge_vlan * vlan,bool on)1480 static inline void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan,
1481 						bool on)
1482 {
1483 }
1484 
br_multicast_toggle_vlan_snooping(struct net_bridge * br,bool on,struct netlink_ext_ack * extack)1485 static inline int br_multicast_toggle_vlan_snooping(struct net_bridge *br,
1486 						    bool on,
1487 						    struct netlink_ext_ack *extack)
1488 {
1489 	return -EOPNOTSUPP;
1490 }
1491 
br_multicast_toggle_global_vlan(struct net_bridge_vlan * vlan,bool on)1492 static inline bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan,
1493 						   bool on)
1494 {
1495 	return false;
1496 }
1497 
1498 static inline bool
br_multicast_ctx_options_equal(const struct net_bridge_mcast * brmctx1,const struct net_bridge_mcast * brmctx2)1499 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1,
1500 			       const struct net_bridge_mcast *brmctx2)
1501 {
1502 	return true;
1503 }
1504 #endif
1505 
1506 /* br_vlan.c */
1507 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1508 bool br_allowed_ingress(const struct net_bridge *br,
1509 			struct net_bridge_vlan_group *vg, struct sk_buff *skb,
1510 			u16 *vid, u8 *state,
1511 			struct net_bridge_vlan **vlan);
1512 bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1513 		       const struct sk_buff *skb);
1514 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
1515 struct sk_buff *br_handle_vlan(struct net_bridge *br,
1516 			       const struct net_bridge_port *port,
1517 			       struct net_bridge_vlan_group *vg,
1518 			       struct sk_buff *skb);
1519 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1520 		bool *changed, struct netlink_ext_ack *extack);
1521 int br_vlan_delete(struct net_bridge *br, u16 vid);
1522 void br_vlan_flush(struct net_bridge *br);
1523 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
1524 void br_recalculate_fwd_mask(struct net_bridge *br);
1525 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val,
1526 			  struct netlink_ext_ack *extack);
1527 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto,
1528 			struct netlink_ext_ack *extack);
1529 int br_vlan_set_proto(struct net_bridge *br, unsigned long val,
1530 		      struct netlink_ext_ack *extack);
1531 int br_vlan_set_stats(struct net_bridge *br, unsigned long val);
1532 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val);
1533 int br_vlan_init(struct net_bridge *br);
1534 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val,
1535 			     struct netlink_ext_ack *extack);
1536 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid,
1537 			       struct netlink_ext_ack *extack);
1538 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1539 		 bool *changed, struct netlink_ext_ack *extack);
1540 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
1541 void nbp_vlan_flush(struct net_bridge_port *port);
1542 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack);
1543 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
1544 void br_vlan_get_stats(const struct net_bridge_vlan *v,
1545 		       struct pcpu_sw_netstats *stats);
1546 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event);
1547 int br_vlan_bridge_event(struct net_device *dev, unsigned long event,
1548 			 void *ptr);
1549 void br_vlan_rtnl_init(void);
1550 void br_vlan_rtnl_uninit(void);
1551 void br_vlan_notify(const struct net_bridge *br,
1552 		    const struct net_bridge_port *p,
1553 		    u16 vid, u16 vid_range,
1554 		    int cmd);
1555 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1556 			     const struct net_bridge_vlan *range_end);
1557 
1558 void br_vlan_fill_forward_path_pvid(struct net_bridge *br,
1559 				    struct net_device_path_ctx *ctx,
1560 				    struct net_device_path *path);
1561 int br_vlan_fill_forward_path_mode(struct net_bridge *br,
1562 				   struct net_bridge_port *dst,
1563 				   struct net_device_path *path);
1564 
br_vlan_group(const struct net_bridge * br)1565 static inline struct net_bridge_vlan_group *br_vlan_group(
1566 					const struct net_bridge *br)
1567 {
1568 	return rtnl_dereference(br->vlgrp);
1569 }
1570 
nbp_vlan_group(const struct net_bridge_port * p)1571 static inline struct net_bridge_vlan_group *nbp_vlan_group(
1572 					const struct net_bridge_port *p)
1573 {
1574 	return rtnl_dereference(p->vlgrp);
1575 }
1576 
br_vlan_group_rcu(const struct net_bridge * br)1577 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1578 					const struct net_bridge *br)
1579 {
1580 	return rcu_dereference(br->vlgrp);
1581 }
1582 
nbp_vlan_group_rcu(const struct net_bridge_port * p)1583 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1584 					const struct net_bridge_port *p)
1585 {
1586 	return rcu_dereference(p->vlgrp);
1587 }
1588 
1589 /* Since bridge now depends on 8021Q module, but the time bridge sees the
1590  * skb, the vlan tag will always be present if the frame was tagged.
1591  */
br_vlan_get_tag(const struct sk_buff * skb,u16 * vid)1592 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
1593 {
1594 	int err = 0;
1595 
1596 	if (skb_vlan_tag_present(skb)) {
1597 		*vid = skb_vlan_tag_get_id(skb);
1598 	} else {
1599 		*vid = 0;
1600 		err = -EINVAL;
1601 	}
1602 
1603 	return err;
1604 }
1605 
br_get_pvid(const struct net_bridge_vlan_group * vg)1606 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1607 {
1608 	if (!vg)
1609 		return 0;
1610 
1611 	smp_rmb();
1612 	return vg->pvid;
1613 }
1614 
br_vlan_flags(const struct net_bridge_vlan * v,u16 pvid)1615 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid)
1616 {
1617 	return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags;
1618 }
1619 #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)1620 static inline bool br_allowed_ingress(const struct net_bridge *br,
1621 				      struct net_bridge_vlan_group *vg,
1622 				      struct sk_buff *skb,
1623 				      u16 *vid, u8 *state,
1624 				      struct net_bridge_vlan **vlan)
1625 
1626 {
1627 	*vlan = NULL;
1628 	return true;
1629 }
1630 
br_allowed_egress(struct net_bridge_vlan_group * vg,const struct sk_buff * skb)1631 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1632 				     const struct sk_buff *skb)
1633 {
1634 	return true;
1635 }
1636 
br_should_learn(struct net_bridge_port * p,struct sk_buff * skb,u16 * vid)1637 static inline bool br_should_learn(struct net_bridge_port *p,
1638 				   struct sk_buff *skb, u16 *vid)
1639 {
1640 	return true;
1641 }
1642 
br_handle_vlan(struct net_bridge * br,const struct net_bridge_port * port,struct net_bridge_vlan_group * vg,struct sk_buff * skb)1643 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
1644 					     const struct net_bridge_port *port,
1645 					     struct net_bridge_vlan_group *vg,
1646 					     struct sk_buff *skb)
1647 {
1648 	return skb;
1649 }
1650 
br_vlan_add(struct net_bridge * br,u16 vid,u16 flags,bool * changed,struct netlink_ext_ack * extack)1651 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1652 			      bool *changed, struct netlink_ext_ack *extack)
1653 {
1654 	*changed = false;
1655 	return -EOPNOTSUPP;
1656 }
1657 
br_vlan_delete(struct net_bridge * br,u16 vid)1658 static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
1659 {
1660 	return -EOPNOTSUPP;
1661 }
1662 
br_vlan_flush(struct net_bridge * br)1663 static inline void br_vlan_flush(struct net_bridge *br)
1664 {
1665 }
1666 
br_recalculate_fwd_mask(struct net_bridge * br)1667 static inline void br_recalculate_fwd_mask(struct net_bridge *br)
1668 {
1669 }
1670 
br_vlan_init(struct net_bridge * br)1671 static inline int br_vlan_init(struct net_bridge *br)
1672 {
1673 	return 0;
1674 }
1675 
nbp_vlan_add(struct net_bridge_port * port,u16 vid,u16 flags,bool * changed,struct netlink_ext_ack * extack)1676 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1677 			       bool *changed, struct netlink_ext_ack *extack)
1678 {
1679 	*changed = false;
1680 	return -EOPNOTSUPP;
1681 }
1682 
nbp_vlan_delete(struct net_bridge_port * port,u16 vid)1683 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
1684 {
1685 	return -EOPNOTSUPP;
1686 }
1687 
nbp_vlan_flush(struct net_bridge_port * port)1688 static inline void nbp_vlan_flush(struct net_bridge_port *port)
1689 {
1690 }
1691 
br_vlan_find(struct net_bridge_vlan_group * vg,u16 vid)1692 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
1693 						   u16 vid)
1694 {
1695 	return NULL;
1696 }
1697 
nbp_vlan_init(struct net_bridge_port * port,struct netlink_ext_ack * extack)1698 static inline int nbp_vlan_init(struct net_bridge_port *port,
1699 				struct netlink_ext_ack *extack)
1700 {
1701 	return 0;
1702 }
1703 
br_vlan_get_tag(const struct sk_buff * skb,u16 * tag)1704 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
1705 {
1706 	return 0;
1707 }
1708 
br_get_pvid(const struct net_bridge_vlan_group * vg)1709 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1710 {
1711 	return 0;
1712 }
1713 
br_vlan_filter_toggle(struct net_bridge * br,unsigned long val,struct netlink_ext_ack * extack)1714 static inline int br_vlan_filter_toggle(struct net_bridge *br,
1715 					unsigned long val,
1716 					struct netlink_ext_ack *extack)
1717 {
1718 	return -EOPNOTSUPP;
1719 }
1720 
nbp_get_num_vlan_infos(struct net_bridge_port * p,u32 filter_mask)1721 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
1722 					 u32 filter_mask)
1723 {
1724 	return 0;
1725 }
1726 
br_vlan_fill_forward_path_pvid(struct net_bridge * br,struct net_device_path_ctx * ctx,struct net_device_path * path)1727 static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br,
1728 						  struct net_device_path_ctx *ctx,
1729 						  struct net_device_path *path)
1730 {
1731 }
1732 
br_vlan_fill_forward_path_mode(struct net_bridge * br,struct net_bridge_port * dst,struct net_device_path * path)1733 static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br,
1734 						 struct net_bridge_port *dst,
1735 						 struct net_device_path *path)
1736 {
1737 	return 0;
1738 }
1739 
br_vlan_group(const struct net_bridge * br)1740 static inline struct net_bridge_vlan_group *br_vlan_group(
1741 					const struct net_bridge *br)
1742 {
1743 	return NULL;
1744 }
1745 
nbp_vlan_group(const struct net_bridge_port * p)1746 static inline struct net_bridge_vlan_group *nbp_vlan_group(
1747 					const struct net_bridge_port *p)
1748 {
1749 	return NULL;
1750 }
1751 
br_vlan_group_rcu(const struct net_bridge * br)1752 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1753 					const struct net_bridge *br)
1754 {
1755 	return NULL;
1756 }
1757 
nbp_vlan_group_rcu(const struct net_bridge_port * p)1758 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1759 					const struct net_bridge_port *p)
1760 {
1761 	return NULL;
1762 }
1763 
br_vlan_get_stats(const struct net_bridge_vlan * v,struct pcpu_sw_netstats * stats)1764 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v,
1765 				     struct pcpu_sw_netstats *stats)
1766 {
1767 }
1768 
br_vlan_port_event(struct net_bridge_port * p,unsigned long event)1769 static inline void br_vlan_port_event(struct net_bridge_port *p,
1770 				      unsigned long event)
1771 {
1772 }
1773 
br_vlan_bridge_event(struct net_device * dev,unsigned long event,void * ptr)1774 static inline int br_vlan_bridge_event(struct net_device *dev,
1775 				       unsigned long event, void *ptr)
1776 {
1777 	return 0;
1778 }
1779 
br_vlan_rtnl_init(void)1780 static inline void br_vlan_rtnl_init(void)
1781 {
1782 }
1783 
br_vlan_rtnl_uninit(void)1784 static inline void br_vlan_rtnl_uninit(void)
1785 {
1786 }
1787 
br_vlan_notify(const struct net_bridge * br,const struct net_bridge_port * p,u16 vid,u16 vid_range,int cmd)1788 static inline void br_vlan_notify(const struct net_bridge *br,
1789 				  const struct net_bridge_port *p,
1790 				  u16 vid, u16 vid_range,
1791 				  int cmd)
1792 {
1793 }
1794 
br_vlan_can_enter_range(const struct net_bridge_vlan * v_curr,const struct net_bridge_vlan * range_end)1795 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1796 					   const struct net_bridge_vlan *range_end)
1797 {
1798 	return true;
1799 }
1800 
br_vlan_flags(const struct net_bridge_vlan * v,u16 pvid)1801 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid)
1802 {
1803 	return 0;
1804 }
1805 
1806 #endif
1807 
1808 /* br_vlan_options.c */
1809 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1810 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr,
1811 			   const struct net_bridge_vlan *range_end);
1812 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v,
1813 		       const struct net_bridge_port *p);
1814 size_t br_vlan_opts_nl_size(void);
1815 int br_vlan_process_options(const struct net_bridge *br,
1816 			    const struct net_bridge_port *p,
1817 			    struct net_bridge_vlan *range_start,
1818 			    struct net_bridge_vlan *range_end,
1819 			    struct nlattr **tb,
1820 			    struct netlink_ext_ack *extack);
1821 int br_vlan_rtm_process_global_options(struct net_device *dev,
1822 				       const struct nlattr *attr,
1823 				       int cmd,
1824 				       struct netlink_ext_ack *extack);
1825 bool br_vlan_global_opts_can_enter_range(const struct net_bridge_vlan *v_curr,
1826 					 const struct net_bridge_vlan *r_end);
1827 bool br_vlan_global_opts_fill(struct sk_buff *skb, u16 vid, u16 vid_range,
1828 			      const struct net_bridge_vlan *v_opts);
1829 
1830 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */
br_vlan_get_state(const struct net_bridge_vlan * v)1831 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v)
1832 {
1833 	return READ_ONCE(v->state);
1834 }
1835 
br_vlan_set_state(struct net_bridge_vlan * v,u8 state)1836 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state)
1837 {
1838 	WRITE_ONCE(v->state, state);
1839 }
1840 
br_vlan_get_pvid_state(const struct net_bridge_vlan_group * vg)1841 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg)
1842 {
1843 	return READ_ONCE(vg->pvid_state);
1844 }
1845 
br_vlan_set_pvid_state(struct net_bridge_vlan_group * vg,u8 state)1846 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg,
1847 					  u8 state)
1848 {
1849 	WRITE_ONCE(vg->pvid_state, state);
1850 }
1851 
1852 /* learn_allow is true at ingress and false at egress */
br_vlan_state_allowed(u8 state,bool learn_allow)1853 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow)
1854 {
1855 	switch (state) {
1856 	case BR_STATE_LEARNING:
1857 		return learn_allow;
1858 	case BR_STATE_FORWARDING:
1859 		return true;
1860 	default:
1861 		return false;
1862 	}
1863 }
1864 #endif
1865 
1866 /* br_mst.c */
1867 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1868 DECLARE_STATIC_KEY_FALSE(br_mst_used);
br_mst_is_enabled(struct net_bridge * br)1869 static inline bool br_mst_is_enabled(struct net_bridge *br)
1870 {
1871 	return static_branch_unlikely(&br_mst_used) &&
1872 		br_opt_get(br, BROPT_MST_ENABLED);
1873 }
1874 
1875 int br_mst_set_state(struct net_bridge_port *p, u16 msti, u8 state,
1876 		     struct netlink_ext_ack *extack);
1877 int br_mst_vlan_set_msti(struct net_bridge_vlan *v, u16 msti);
1878 void br_mst_vlan_init_state(struct net_bridge_vlan *v);
1879 int br_mst_set_enabled(struct net_bridge *br, bool on,
1880 		       struct netlink_ext_ack *extack);
1881 size_t br_mst_info_size(const struct net_bridge_vlan_group *vg);
1882 int br_mst_fill_info(struct sk_buff *skb,
1883 		     const struct net_bridge_vlan_group *vg);
1884 int br_mst_process(struct net_bridge_port *p, const struct nlattr *mst_attr,
1885 		   struct netlink_ext_ack *extack);
1886 #else
br_mst_is_enabled(struct net_bridge * br)1887 static inline bool br_mst_is_enabled(struct net_bridge *br)
1888 {
1889 	return false;
1890 }
1891 
br_mst_set_state(struct net_bridge_port * p,u16 msti,u8 state,struct netlink_ext_ack * extack)1892 static inline int br_mst_set_state(struct net_bridge_port *p, u16 msti,
1893 				   u8 state, struct netlink_ext_ack *extack)
1894 {
1895 	return -EOPNOTSUPP;
1896 }
1897 
br_mst_set_enabled(struct net_bridge * br,bool on,struct netlink_ext_ack * extack)1898 static inline int br_mst_set_enabled(struct net_bridge *br, bool on,
1899 				     struct netlink_ext_ack *extack)
1900 {
1901 	return -EOPNOTSUPP;
1902 }
1903 
br_mst_info_size(const struct net_bridge_vlan_group * vg)1904 static inline size_t br_mst_info_size(const struct net_bridge_vlan_group *vg)
1905 {
1906 	return 0;
1907 }
1908 
br_mst_fill_info(struct sk_buff * skb,const struct net_bridge_vlan_group * vg)1909 static inline int br_mst_fill_info(struct sk_buff *skb,
1910 				   const struct net_bridge_vlan_group *vg)
1911 {
1912 	return -EOPNOTSUPP;
1913 }
1914 
br_mst_process(struct net_bridge_port * p,const struct nlattr * mst_attr,struct netlink_ext_ack * extack)1915 static inline int br_mst_process(struct net_bridge_port *p,
1916 				 const struct nlattr *mst_attr,
1917 				 struct netlink_ext_ack *extack)
1918 {
1919 	return -EOPNOTSUPP;
1920 }
1921 #endif
1922 
1923 struct nf_br_ops {
1924 	int (*br_dev_xmit_hook)(struct sk_buff *skb);
1925 };
1926 extern const struct nf_br_ops __rcu *nf_br_ops;
1927 
1928 /* br_netfilter.c */
1929 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1930 int br_nf_core_init(void);
1931 void br_nf_core_fini(void);
1932 void br_netfilter_rtable_init(struct net_bridge *);
1933 #else
br_nf_core_init(void)1934 static inline int br_nf_core_init(void) { return 0; }
br_nf_core_fini(void)1935 static inline void br_nf_core_fini(void) {}
1936 #define br_netfilter_rtable_init(x)
1937 #endif
1938 
1939 /* br_stp.c */
1940 void br_set_state(struct net_bridge_port *p, unsigned int state);
1941 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
1942 void br_init_port(struct net_bridge_port *p);
1943 void br_become_designated_port(struct net_bridge_port *p);
1944 
1945 void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
1946 int br_set_forward_delay(struct net_bridge *br, unsigned long x);
1947 int br_set_hello_time(struct net_bridge *br, unsigned long x);
1948 int br_set_max_age(struct net_bridge *br, unsigned long x);
1949 int __set_ageing_time(struct net_device *dev, unsigned long t);
1950 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time);
1951 
1952 
1953 /* br_stp_if.c */
1954 void br_stp_enable_bridge(struct net_bridge *br);
1955 void br_stp_disable_bridge(struct net_bridge *br);
1956 int br_stp_set_enabled(struct net_bridge *br, unsigned long val,
1957 		       struct netlink_ext_ack *extack);
1958 void br_stp_enable_port(struct net_bridge_port *p);
1959 void br_stp_disable_port(struct net_bridge_port *p);
1960 bool br_stp_recalculate_bridge_id(struct net_bridge *br);
1961 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
1962 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
1963 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
1964 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
1965 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
1966 
1967 /* br_stp_bpdu.c */
1968 struct stp_proto;
1969 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
1970 		struct net_device *dev);
1971 
1972 /* br_stp_timer.c */
1973 void br_stp_timer_init(struct net_bridge *br);
1974 void br_stp_port_timer_init(struct net_bridge_port *p);
1975 unsigned long br_timer_value(const struct timer_list *timer);
1976 
1977 /* br.c */
1978 #if IS_ENABLED(CONFIG_ATM_LANE)
1979 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
1980 #endif
1981 
1982 /* br_mrp.c */
1983 #if IS_ENABLED(CONFIG_BRIDGE_MRP)
1984 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
1985 		 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
1986 bool br_mrp_enabled(struct net_bridge *br);
1987 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p);
1988 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br);
1989 #else
br_mrp_parse(struct net_bridge * br,struct net_bridge_port * p,struct nlattr * attr,int cmd,struct netlink_ext_ack * extack)1990 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
1991 			       struct nlattr *attr, int cmd,
1992 			       struct netlink_ext_ack *extack)
1993 {
1994 	return -EOPNOTSUPP;
1995 }
1996 
br_mrp_enabled(struct net_bridge * br)1997 static inline bool br_mrp_enabled(struct net_bridge *br)
1998 {
1999 	return false;
2000 }
2001 
br_mrp_port_del(struct net_bridge * br,struct net_bridge_port * p)2002 static inline void br_mrp_port_del(struct net_bridge *br,
2003 				   struct net_bridge_port *p)
2004 {
2005 }
2006 
br_mrp_fill_info(struct sk_buff * skb,struct net_bridge * br)2007 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br)
2008 {
2009 	return 0;
2010 }
2011 
2012 #endif
2013 
2014 /* br_cfm.c */
2015 #if IS_ENABLED(CONFIG_BRIDGE_CFM)
2016 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
2017 		 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
2018 bool br_cfm_created(struct net_bridge *br);
2019 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p);
2020 int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br);
2021 int br_cfm_status_fill_info(struct sk_buff *skb,
2022 			    struct net_bridge *br,
2023 			    bool getlink);
2024 int br_cfm_mep_count(struct net_bridge *br, u32 *count);
2025 int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count);
2026 #else
br_cfm_parse(struct net_bridge * br,struct net_bridge_port * p,struct nlattr * attr,int cmd,struct netlink_ext_ack * extack)2027 static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
2028 			       struct nlattr *attr, int cmd,
2029 			       struct netlink_ext_ack *extack)
2030 {
2031 	return -EOPNOTSUPP;
2032 }
2033 
br_cfm_created(struct net_bridge * br)2034 static inline bool br_cfm_created(struct net_bridge *br)
2035 {
2036 	return false;
2037 }
2038 
br_cfm_port_del(struct net_bridge * br,struct net_bridge_port * p)2039 static inline void br_cfm_port_del(struct net_bridge *br,
2040 				   struct net_bridge_port *p)
2041 {
2042 }
2043 
br_cfm_config_fill_info(struct sk_buff * skb,struct net_bridge * br)2044 static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br)
2045 {
2046 	return -EOPNOTSUPP;
2047 }
2048 
br_cfm_status_fill_info(struct sk_buff * skb,struct net_bridge * br,bool getlink)2049 static inline int br_cfm_status_fill_info(struct sk_buff *skb,
2050 					  struct net_bridge *br,
2051 					  bool getlink)
2052 {
2053 	return -EOPNOTSUPP;
2054 }
2055 
br_cfm_mep_count(struct net_bridge * br,u32 * count)2056 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count)
2057 {
2058 	*count = 0;
2059 	return -EOPNOTSUPP;
2060 }
2061 
br_cfm_peer_mep_count(struct net_bridge * br,u32 * count)2062 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count)
2063 {
2064 	*count = 0;
2065 	return -EOPNOTSUPP;
2066 }
2067 #endif
2068 
2069 /* br_netlink.c */
2070 extern struct rtnl_link_ops br_link_ops;
2071 int br_netlink_init(void);
2072 void br_netlink_fini(void);
2073 void br_ifinfo_notify(int event, const struct net_bridge *br,
2074 		      const struct net_bridge_port *port);
2075 void br_info_notify(int event, const struct net_bridge *br,
2076 		    const struct net_bridge_port *port, u32 filter);
2077 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags,
2078 	       struct netlink_ext_ack *extack);
2079 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
2080 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
2081 	       u32 filter_mask, int nlflags);
2082 int br_process_vlan_info(struct net_bridge *br,
2083 			 struct net_bridge_port *p, int cmd,
2084 			 struct bridge_vlan_info *vinfo_curr,
2085 			 struct bridge_vlan_info **vinfo_last,
2086 			 bool *changed,
2087 			 struct netlink_ext_ack *extack);
2088 
2089 #ifdef CONFIG_SYSFS
2090 /* br_sysfs_if.c */
2091 extern const struct sysfs_ops brport_sysfs_ops;
2092 int br_sysfs_addif(struct net_bridge_port *p);
2093 int br_sysfs_renameif(struct net_bridge_port *p);
2094 
2095 /* br_sysfs_br.c */
2096 int br_sysfs_addbr(struct net_device *dev);
2097 void br_sysfs_delbr(struct net_device *dev);
2098 
2099 #else
2100 
br_sysfs_addif(struct net_bridge_port * p)2101 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
br_sysfs_renameif(struct net_bridge_port * p)2102 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
br_sysfs_addbr(struct net_device * dev)2103 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
br_sysfs_delbr(struct net_device * dev)2104 static inline void br_sysfs_delbr(struct net_device *dev) { return; }
2105 #endif /* CONFIG_SYSFS */
2106 
2107 /* br_switchdev.c */
2108 #ifdef CONFIG_NET_SWITCHDEV
2109 int br_switchdev_port_offload(struct net_bridge_port *p,
2110 			      struct net_device *dev, const void *ctx,
2111 			      struct notifier_block *atomic_nb,
2112 			      struct notifier_block *blocking_nb,
2113 			      bool tx_fwd_offload,
2114 			      struct netlink_ext_ack *extack);
2115 
2116 void br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx,
2117 				 struct notifier_block *atomic_nb,
2118 				 struct notifier_block *blocking_nb);
2119 
2120 int br_switchdev_port_replay(struct net_bridge_port *p,
2121 			     struct net_device *dev, const void *ctx,
2122 			     struct notifier_block *atomic_nb,
2123 			     struct notifier_block *blocking_nb,
2124 			     struct netlink_ext_ack *extack);
2125 
2126 bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb);
2127 
2128 void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb);
2129 
2130 void nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p,
2131 					     struct sk_buff *skb);
2132 void nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p,
2133 					      struct sk_buff *skb);
2134 void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
2135 			      struct sk_buff *skb);
2136 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
2137 				  const struct sk_buff *skb);
2138 int br_switchdev_set_port_flag(struct net_bridge_port *p,
2139 			       unsigned long flags,
2140 			       unsigned long mask,
2141 			       struct netlink_ext_ack *extack);
2142 void br_switchdev_fdb_notify(struct net_bridge *br,
2143 			     const struct net_bridge_fdb_entry *fdb, int type);
2144 void br_switchdev_mdb_notify(struct net_device *dev,
2145 			     struct net_bridge_mdb_entry *mp,
2146 			     struct net_bridge_port_group *pg,
2147 			     int type);
2148 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags,
2149 			       bool changed, struct netlink_ext_ack *extack);
2150 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid);
2151 void br_switchdev_init(struct net_bridge *br);
2152 
br_switchdev_frame_unmark(struct sk_buff * skb)2153 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
2154 {
2155 	skb->offload_fwd_mark = 0;
2156 }
2157 #else
2158 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)2159 br_switchdev_port_offload(struct net_bridge_port *p,
2160 			  struct net_device *dev, const void *ctx,
2161 			  struct notifier_block *atomic_nb,
2162 			  struct notifier_block *blocking_nb,
2163 			  bool tx_fwd_offload,
2164 			  struct netlink_ext_ack *extack)
2165 {
2166 	return -EOPNOTSUPP;
2167 }
2168 
2169 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)2170 br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx,
2171 			    struct notifier_block *atomic_nb,
2172 			    struct notifier_block *blocking_nb)
2173 {
2174 }
2175 
2176 static inline int
br_switchdev_port_replay(struct net_bridge_port * p,struct net_device * dev,const void * ctx,struct notifier_block * atomic_nb,struct notifier_block * blocking_nb,struct netlink_ext_ack * extack)2177 br_switchdev_port_replay(struct net_bridge_port *p,
2178 			 struct net_device *dev, const void *ctx,
2179 			 struct notifier_block *atomic_nb,
2180 			 struct notifier_block *blocking_nb,
2181 			 struct netlink_ext_ack *extack)
2182 {
2183 	return -EOPNOTSUPP;
2184 }
2185 
br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff * skb)2186 static inline bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb)
2187 {
2188 	return false;
2189 }
2190 
br_switchdev_frame_set_offload_fwd_mark(struct sk_buff * skb)2191 static inline void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb)
2192 {
2193 }
2194 
2195 static inline void
nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port * p,struct sk_buff * skb)2196 nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p,
2197 					struct sk_buff *skb)
2198 {
2199 }
2200 
2201 static inline void
nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port * p,struct sk_buff * skb)2202 nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p,
2203 					 struct sk_buff *skb)
2204 {
2205 }
2206 
nbp_switchdev_frame_mark(const struct net_bridge_port * p,struct sk_buff * skb)2207 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
2208 					    struct sk_buff *skb)
2209 {
2210 }
2211 
nbp_switchdev_allowed_egress(const struct net_bridge_port * p,const struct sk_buff * skb)2212 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
2213 						const struct sk_buff *skb)
2214 {
2215 	return true;
2216 }
2217 
br_switchdev_set_port_flag(struct net_bridge_port * p,unsigned long flags,unsigned long mask,struct netlink_ext_ack * extack)2218 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p,
2219 					     unsigned long flags,
2220 					     unsigned long mask,
2221 					     struct netlink_ext_ack *extack)
2222 {
2223 	return 0;
2224 }
2225 
br_switchdev_port_vlan_add(struct net_device * dev,u16 vid,u16 flags,bool changed,struct netlink_ext_ack * extack)2226 static inline int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid,
2227 					     u16 flags, bool changed,
2228 					     struct netlink_ext_ack *extack)
2229 {
2230 	return -EOPNOTSUPP;
2231 }
2232 
br_switchdev_port_vlan_del(struct net_device * dev,u16 vid)2233 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid)
2234 {
2235 	return -EOPNOTSUPP;
2236 }
2237 
2238 static inline void
br_switchdev_fdb_notify(struct net_bridge * br,const struct net_bridge_fdb_entry * fdb,int type)2239 br_switchdev_fdb_notify(struct net_bridge *br,
2240 			const struct net_bridge_fdb_entry *fdb, int type)
2241 {
2242 }
2243 
br_switchdev_mdb_notify(struct net_device * dev,struct net_bridge_mdb_entry * mp,struct net_bridge_port_group * pg,int type)2244 static inline void br_switchdev_mdb_notify(struct net_device *dev,
2245 					   struct net_bridge_mdb_entry *mp,
2246 					   struct net_bridge_port_group *pg,
2247 					   int type)
2248 {
2249 }
2250 
br_switchdev_frame_unmark(struct sk_buff * skb)2251 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
2252 {
2253 }
2254 
br_switchdev_init(struct net_bridge * br)2255 static inline void br_switchdev_init(struct net_bridge *br)
2256 {
2257 }
2258 
2259 #endif /* CONFIG_NET_SWITCHDEV */
2260 
2261 /* br_arp_nd_proxy.c */
2262 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br);
2263 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br,
2264 			      u16 vid, struct net_bridge_port *p);
2265 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br,
2266 		       u16 vid, struct net_bridge_port *p, struct nd_msg *msg);
2267 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m);
2268 bool br_is_neigh_suppress_enabled(const struct net_bridge_port *p, u16 vid);
2269 #endif
2270