1/*
  2 *	Linux ethernet bridge
  3 *
  4 *	Authors:
  5 *	Lennert Buytenhek		<buytenh@gnu.org>
  6 *
  7 *	This program is free software; you can redistribute it and/or
  8 *	modify it under the terms of the GNU General Public License
  9 *	as published by the Free Software Foundation; either version
 10 *	2 of the License, or (at your option) any later version.
 11 */
 12
 13#ifndef _BR_PRIVATE_H
 14#define _BR_PRIVATE_H
 15
 16#include <linux/netdevice.h>
 17#include <linux/if_bridge.h>
 18#include <linux/netpoll.h>
 19#include <linux/u64_stats_sync.h>
 20#include <net/route.h>
 21#include <net/ip6_fib.h>
 22#include <linux/if_vlan.h>
 23#include <linux/rhashtable.h>
 
 24
 25#define BR_HASH_BITS 8
 26#define BR_HASH_SIZE (1 << BR_HASH_BITS)
 27
 28#define BR_HOLD_TIME (1*HZ)
 29
 30#define BR_PORT_BITS	10
 31#define BR_MAX_PORTS	(1<<BR_PORT_BITS)
 32
 
 
 33#define BR_VERSION	"2.3"
 34
 35/* Control of forwarding link local multicast */
 36#define BR_GROUPFWD_DEFAULT	0
 37/* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */
 38#define BR_GROUPFWD_RESTRICTED	0x0007u
 
 
 
 
 
 
 
 39/* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
 40#define BR_GROUPFWD_8021AD	0xB801u
 41
 42/* Path to usermode spanning tree program */
 43#define BR_STP_PROG	"/sbin/bridge-stp"
 44
 
 
 45typedef struct bridge_id bridge_id;
 46typedef struct mac_addr mac_addr;
 47typedef __u16 port_id;
 48
 49struct bridge_id
 50{
 51	unsigned char	prio[2];
 52	unsigned char	addr[ETH_ALEN];
 53};
 54
 55struct mac_addr
 56{
 57	unsigned char	addr[ETH_ALEN];
 58};
 59
 60#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 61/* our own querier */
 62struct bridge_mcast_own_query {
 63	struct timer_list	timer;
 64	u32			startup_sent;
 65};
 66
 67/* other querier */
 68struct bridge_mcast_other_query {
 69	struct timer_list		timer;
 70	unsigned long			delay_time;
 71};
 72
 73/* selected querier */
 74struct bridge_mcast_querier {
 75	struct br_ip addr;
 76	struct net_bridge_port __rcu	*port;
 77};
 
 
 
 
 
 
 78#endif
 79
 
 
 
 
 
 
 
 
 
 
 
 80/**
 81 * struct net_bridge_vlan - per-vlan entry
 82 *
 83 * @vnode: rhashtable member
 84 * @vid: VLAN id
 85 * @flags: bridge vlan flags
 
 
 
 86 * @br: if MASTER flag set, this points to a bridge struct
 87 * @port: if MASTER flag unset, this points to a port struct
 88 * @refcnt: if MASTER flag set, this is bumped for each port referencing it
 89 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
 90 *          for this VLAN entry
 91 * @vlist: sorted list of VLAN entries
 92 * @rcu: used for entry destruction
 93 *
 94 * This structure is shared between the global per-VLAN entries contained in
 95 * the bridge rhashtable and the local per-port per-VLAN entries contained in
 96 * the port's rhashtable. The union entries should be interpreted depending on
 97 * the entry flags that are set.
 98 */
 99struct net_bridge_vlan {
100	struct rhash_head		vnode;
 
101	u16				vid;
102	u16				flags;
 
 
 
103	union {
104		struct net_bridge	*br;
105		struct net_bridge_port	*port;
106	};
107	union {
108		atomic_t		refcnt;
109		struct net_bridge_vlan	*brvlan;
110	};
 
 
 
111	struct list_head		vlist;
112
113	struct rcu_head			rcu;
114};
115
116/**
117 * struct net_bridge_vlan_group
118 *
119 * @vlan_hash: VLAN entry rhashtable
120 * @vlan_list: sorted VLAN entry list
121 * @num_vlans: number of total VLAN entries
122 * @pvid: PVID VLAN id
 
123 *
124 * IMPORTANT: Be careful when checking if there're VLAN entries using list
125 *            primitives because the bridge can have entries in its list which
126 *            are just for global context but not for filtering, i.e. they have
127 *            the master flag set but not the brentry flag. If you have to check
128 *            if there're "real" entries in the bridge please test @num_vlans
129 */
130struct net_bridge_vlan_group {
131	struct rhashtable		vlan_hash;
 
132	struct list_head		vlan_list;
133	u16				num_vlans;
134	u16				pvid;
 
135};
136
137struct net_bridge_fdb_entry
138{
139	struct hlist_node		hlist;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
140	struct net_bridge_port		*dst;
141
142	unsigned long			updated;
 
 
 
 
 
143	unsigned long			used;
144	mac_addr			addr;
145	__u16				vlan_id;
146	unsigned char			is_local:1,
147					is_static:1,
148					added_by_user:1,
149					added_by_external_learn:1;
150	struct rcu_head			rcu;
151};
152
153#define MDB_PG_FLAGS_PERMANENT	BIT(0)
154#define MDB_PG_FLAGS_OFFLOAD	BIT(1)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
155
156struct net_bridge_port_group {
 
 
 
 
 
 
 
 
 
 
 
 
 
 
157	struct net_bridge_port		*port;
 
 
 
 
158	struct net_bridge_port_group __rcu *next;
 
 
 
 
 
 
 
 
 
 
 
159	struct hlist_node		mglist;
 
 
 
 
 
160	struct rcu_head			rcu;
161	struct timer_list		timer;
162	struct br_ip			addr;
163	unsigned char			flags;
164};
165
166struct net_bridge_mdb_entry
167{
168	struct hlist_node		hlist[2];
169	struct net_bridge		*br;
170	struct net_bridge_port_group __rcu *ports;
171	struct rcu_head			rcu;
172	struct timer_list		timer;
173	struct br_ip			addr;
174	bool				mglist;
175};
176
177struct net_bridge_mdb_htable
178{
179	struct hlist_head		*mhash;
 
180	struct rcu_head			rcu;
181	struct net_bridge_mdb_htable	*old;
182	u32				size;
183	u32				max;
184	u32				secret;
185	u32				ver;
186};
187
188struct net_bridge_port
189{
190	struct net_bridge		*br;
191	struct net_device		*dev;
192	struct list_head		list;
193
 
 
 
 
 
 
194	/* STP */
195	u8				priority;
196	u8				state;
197	u16				port_no;
198	unsigned char			topology_change_ack;
199	unsigned char			config_pending;
200	port_id				port_id;
201	port_id				designated_port;
202	bridge_id			designated_root;
203	bridge_id			designated_bridge;
204	u32				path_cost;
205	u32				designated_cost;
206	unsigned long			designated_age;
207
208	struct timer_list		forward_delay_timer;
209	struct timer_list		hold_timer;
210	struct timer_list		message_age_timer;
211	struct kobject			kobj;
212	struct rcu_head			rcu;
213
214	unsigned long 			flags;
215
216#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
217	struct bridge_mcast_own_query	ip4_own_query;
 
 
218#if IS_ENABLED(CONFIG_IPV6)
219	struct bridge_mcast_own_query	ip6_own_query;
 
 
220#endif /* IS_ENABLED(CONFIG_IPV6) */
 
 
221	unsigned char			multicast_router;
222	struct timer_list		multicast_router_timer;
223	struct hlist_head		mglist;
224	struct hlist_node		rlist;
225#endif
226
227#ifdef CONFIG_SYSFS
228	char				sysfs_name[IFNAMSIZ];
229#endif
230
231#ifdef CONFIG_NET_POLL_CONTROLLER
232	struct netpoll			*np;
233#endif
234#ifdef CONFIG_BRIDGE_VLAN_FILTERING
235	struct net_bridge_vlan_group	__rcu *vlgrp;
236#endif
 
 
 
 
237};
238
 
 
239#define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
240#define br_promisc_port(p) ((p)->flags & BR_PROMISC)
241
242#define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
243
244static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
245{
246	return rcu_dereference(dev->rx_handler_data);
247}
248
249static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
250{
251	return br_port_exists(dev) ?
252		rtnl_dereference(dev->rx_handler_data) : NULL;
253}
254
255struct net_bridge
256{
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
257	spinlock_t			lock;
258	struct list_head		port_list;
 
259	struct net_device		*dev;
 
 
 
 
 
 
 
260
261	struct pcpu_sw_netstats		__percpu *stats;
262	spinlock_t			hash_lock;
263	struct hlist_head		hash[BR_HASH_SIZE];
264#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
265	union {
266		struct rtable		fake_rtable;
267		struct rt6_info		fake_rt6_info;
268	};
269	bool				nf_call_iptables;
270	bool				nf_call_ip6tables;
271	bool				nf_call_arptables;
272#endif
273	u16				group_fwd_mask;
274	u16				group_fwd_mask_required;
275
276	/* STP */
277	bridge_id			designated_root;
278	bridge_id			bridge_id;
279	u32				root_path_cost;
 
 
280	unsigned long			max_age;
281	unsigned long			hello_time;
282	unsigned long			forward_delay;
283	unsigned long			bridge_max_age;
284	unsigned long			ageing_time;
 
285	unsigned long			bridge_hello_time;
286	unsigned long			bridge_forward_delay;
 
 
287
288	u8				group_addr[ETH_ALEN];
289	bool				group_addr_set;
290	u16				root_port;
291
292	enum {
293		BR_NO_STP, 		/* no spanning tree */
294		BR_KERNEL_STP,		/* old STP in kernel */
295		BR_USER_STP,		/* new RSTP in userspace */
296	} stp_enabled;
297
298	unsigned char			topology_change;
299	unsigned char			topology_change_detected;
300
301#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
302	unsigned char			multicast_router;
303
304	u8				multicast_disabled:1;
305	u8				multicast_querier:1;
306	u8				multicast_query_use_ifaddr:1;
307
308	u32				hash_elasticity;
309	u32				hash_max;
310
311	u32				multicast_last_member_count;
312	u32				multicast_startup_query_count;
313
 
 
 
 
 
 
314	unsigned long			multicast_last_member_interval;
315	unsigned long			multicast_membership_interval;
316	unsigned long			multicast_querier_interval;
317	unsigned long			multicast_query_interval;
318	unsigned long			multicast_query_response_interval;
319	unsigned long			multicast_startup_query_interval;
320
321	spinlock_t			multicast_lock;
322	struct net_bridge_mdb_htable __rcu *mdb;
323	struct hlist_head		router_list;
324
325	struct timer_list		multicast_router_timer;
 
 
 
 
326	struct bridge_mcast_other_query	ip4_other_query;
327	struct bridge_mcast_own_query	ip4_own_query;
328	struct bridge_mcast_querier	ip4_querier;
 
329#if IS_ENABLED(CONFIG_IPV6)
 
 
330	struct bridge_mcast_other_query	ip6_other_query;
331	struct bridge_mcast_own_query	ip6_own_query;
332	struct bridge_mcast_querier	ip6_querier;
333#endif /* IS_ENABLED(CONFIG_IPV6) */
 
334#endif
335
336	struct timer_list		hello_timer;
337	struct timer_list		tcn_timer;
338	struct timer_list		topology_change_timer;
339	struct timer_list		gc_timer;
340	struct kobject			*ifobj;
341	u32				auto_cnt;
342#ifdef CONFIG_BRIDGE_VLAN_FILTERING
343	struct net_bridge_vlan_group	__rcu *vlgrp;
344	u8				vlan_enabled;
345	__be16				vlan_proto;
346	u16				default_pvid;
 
 
 
 
 
 
347#endif
348};
349
350struct br_input_skb_cb {
351	struct net_device *brdev;
352
 
353#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
354	int igmp;
355	int mrouters_only;
356#endif
357
358	bool proxyarp_replied;
359
360#ifdef CONFIG_BRIDGE_VLAN_FILTERING
361	bool vlan_filtered;
 
 
 
 
 
 
 
362#endif
363};
364
365#define BR_INPUT_SKB_CB(__skb)	((struct br_input_skb_cb *)(__skb)->cb)
366
367#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
368# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)	(BR_INPUT_SKB_CB(__skb)->mrouters_only)
369#else
370# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)	(0)
371#endif
372
373#define br_printk(level, br, format, args...)	\
374	printk(level "%s: " format, (br)->dev->name, ##args)
375
376#define br_err(__br, format, args...)			\
377	br_printk(KERN_ERR, __br, format, ##args)
378#define br_warn(__br, format, args...)			\
379	br_printk(KERN_WARNING, __br, format, ##args)
380#define br_notice(__br, format, args...)		\
381	br_printk(KERN_NOTICE, __br, format, ##args)
382#define br_info(__br, format, args...)			\
383	br_printk(KERN_INFO, __br, format, ##args)
384
385#define br_debug(br, format, args...)			\
386	pr_debug("%s: " format,  (br)->dev->name, ##args)
387
388/* called under bridge lock */
389static inline int br_is_root_bridge(const struct net_bridge *br)
390{
391	return !memcmp(&br->bridge_id, &br->designated_root, 8);
392}
393
394/* check if a VLAN entry is global */
395static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
396{
397	return v->flags & BRIDGE_VLAN_INFO_MASTER;
398}
399
400/* check if a VLAN entry is used by the bridge */
401static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
402{
403	return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
404}
405
406/* check if we should use the vlan entry, returns false if it's only context */
407static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
408{
409	if (br_vlan_is_master(v)) {
410		if (br_vlan_is_brentry(v))
411			return true;
412		else
413			return false;
414	}
415
416	return true;
417}
418
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
419/* br_device.c */
420void br_dev_setup(struct net_device *dev);
421void br_dev_delete(struct net_device *dev, struct list_head *list);
422netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
423#ifdef CONFIG_NET_POLL_CONTROLLER
424static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
425				       struct sk_buff *skb)
426{
427	struct netpoll *np = p->np;
428
429	if (np)
430		netpoll_send_skb(np, skb);
431}
432
433int br_netpoll_enable(struct net_bridge_port *p);
434void br_netpoll_disable(struct net_bridge_port *p);
435#else
436static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
437				       struct sk_buff *skb)
438{
439}
440
441static inline int br_netpoll_enable(struct net_bridge_port *p)
442{
443	return 0;
444}
445
446static inline void br_netpoll_disable(struct net_bridge_port *p)
447{
448}
449#endif
450
451/* br_fdb.c */
452int br_fdb_init(void);
453void br_fdb_fini(void);
 
 
454void br_fdb_flush(struct net_bridge *br);
455void br_fdb_find_delete_local(struct net_bridge *br,
456			      const struct net_bridge_port *p,
457			      const unsigned char *addr, u16 vid);
458void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
459void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
460void br_fdb_cleanup(unsigned long arg);
461void br_fdb_delete_by_port(struct net_bridge *br,
462			   const struct net_bridge_port *p, u16 vid, int do_all);
463struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
464					  const unsigned char *addr, __u16 vid);
 
465int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
466int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
467		   unsigned long off);
468int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
469		  const unsigned char *addr, u16 vid);
470void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
471		   const unsigned char *addr, u16 vid, bool added_by_user);
472
473int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
474		  struct net_device *dev, const unsigned char *addr, u16 vid);
475int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
476	       const unsigned char *addr, u16 vid, u16 nlh_flags);
 
477int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
478		struct net_device *dev, struct net_device *fdev, int idx);
 
 
 
479int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
480void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
481int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
482			      const unsigned char *addr, u16 vid);
 
483int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
484			      const unsigned char *addr, u16 vid);
 
 
 
485
486/* br_forward.c */
487void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb);
 
 
 
 
488int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
489void br_forward(const struct net_bridge_port *to,
490		struct sk_buff *skb, struct sk_buff *skb0);
491int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
492void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast);
493void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
494		      struct sk_buff *skb2, bool unicast);
 
 
 
 
 
 
 
495
496/* br_if.c */
497void br_port_carrier_check(struct net_bridge_port *p);
498int br_add_bridge(struct net *net, const char *name);
499int br_del_bridge(struct net *net, const char *name);
500int br_add_if(struct net_bridge *br, struct net_device *dev);
 
501int br_del_if(struct net_bridge *br, struct net_device *dev);
502int br_min_mtu(const struct net_bridge *br);
503netdev_features_t br_features_recompute(struct net_bridge *br,
504					netdev_features_t features);
505void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
506void br_manage_promisc(struct net_bridge *br);
 
507
508/* br_input.c */
509int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
510rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
 
 
 
 
 
 
 
 
 
 
511
512static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
513{
514	return rcu_dereference(dev->rx_handler) == br_handle_frame;
 
 
 
 
 
515}
516
517static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
518{
519	return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
520}
521
 
 
 
 
 
 
522/* br_ioctl.c */
523int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
524int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
525			     void __user *arg);
526
527/* br_multicast.c */
528#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
529extern unsigned int br_mdb_rehash_seq;
530int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
531		     struct sk_buff *skb, u16 vid);
532struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
533					struct sk_buff *skb, u16 vid);
534void br_multicast_add_port(struct net_bridge_port *port);
535void br_multicast_del_port(struct net_bridge_port *port);
536void br_multicast_enable_port(struct net_bridge_port *port);
537void br_multicast_disable_port(struct net_bridge_port *port);
538void br_multicast_init(struct net_bridge *br);
 
 
539void br_multicast_open(struct net_bridge *br);
540void br_multicast_stop(struct net_bridge *br);
541void br_multicast_dev_del(struct net_bridge *br);
542void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
543			  struct sk_buff *skb);
544void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
545			  struct sk_buff *skb, struct sk_buff *skb2);
546int br_multicast_set_router(struct net_bridge *br, unsigned long val);
547int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
548int br_multicast_toggle(struct net_bridge *br, unsigned long val);
 
549int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
550int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
 
 
 
 
551struct net_bridge_mdb_entry *
552br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst);
553struct net_bridge_mdb_entry *
554br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port,
555		       struct br_ip *group);
556void br_multicast_free_pg(struct rcu_head *head);
557struct net_bridge_port_group *
558br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
559			    struct net_bridge_port_group __rcu *next,
560			    unsigned char flags);
561void br_mdb_init(void);
562void br_mdb_uninit(void);
563void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
564		   struct br_ip *group, int type, u8 flags);
 
565void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
566		   int type);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
567
568#define mlock_dereference(X, br) \
569	rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
570
571static inline bool br_multicast_is_router(struct net_bridge *br)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
572{
573	return br->multicast_router == 2 ||
574	       (br->multicast_router == 1 &&
575		timer_pending(&br->multicast_router_timer));
 
 
 
 
 
 
 
 
 
 
 
 
 
 
576}
577
578static inline bool
579__br_multicast_querier_exists(struct net_bridge *br,
580			      struct bridge_mcast_other_query *querier)
 
581{
 
 
 
 
 
 
 
 
 
 
 
582	return time_is_before_jiffies(querier->delay_time) &&
583	       (br->multicast_querier || timer_pending(&querier->timer));
584}
585
586static inline bool br_multicast_querier_exists(struct net_bridge *br,
587					       struct ethhdr *eth)
 
588{
589	switch (eth->h_proto) {
590	case (htons(ETH_P_IP)):
591		return __br_multicast_querier_exists(br, &br->ip4_other_query);
 
592#if IS_ENABLED(CONFIG_IPV6)
593	case (htons(ETH_P_IPV6)):
594		return __br_multicast_querier_exists(br, &br->ip6_other_query);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
595#endif
596	default:
597		return false;
598	}
599}
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
600#else
601static inline int br_multicast_rcv(struct net_bridge *br,
602				   struct net_bridge_port *port,
603				   struct sk_buff *skb,
604				   u16 vid)
605{
606	return 0;
607}
608
609static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
610						      struct sk_buff *skb, u16 vid)
611{
612	return NULL;
613}
614
615static inline void br_multicast_add_port(struct net_bridge_port *port)
616{
 
617}
618
619static inline void br_multicast_del_port(struct net_bridge_port *port)
620{
621}
622
623static inline void br_multicast_enable_port(struct net_bridge_port *port)
624{
625}
626
627static inline void br_multicast_disable_port(struct net_bridge_port *port)
628{
629}
630
631static inline void br_multicast_init(struct net_bridge *br)
632{
633}
634
 
 
 
 
 
 
 
 
635static inline void br_multicast_open(struct net_bridge *br)
636{
637}
638
639static inline void br_multicast_stop(struct net_bridge *br)
640{
641}
642
643static inline void br_multicast_dev_del(struct net_bridge *br)
644{
645}
646
647static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
648					struct sk_buff *skb)
 
649{
650}
651
652static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
653					struct sk_buff *skb,
654					struct sk_buff *skb2)
655{
656}
657static inline bool br_multicast_is_router(struct net_bridge *br)
658{
659	return 0;
660}
 
661static inline bool br_multicast_querier_exists(struct net_bridge *br,
662					       struct ethhdr *eth)
 
663{
664	return false;
665}
 
666static inline void br_mdb_init(void)
667{
668}
 
669static inline void br_mdb_uninit(void)
670{
671}
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
672#endif
673
674/* br_vlan.c */
675#ifdef CONFIG_BRIDGE_VLAN_FILTERING
676bool br_allowed_ingress(const struct net_bridge *br,
677			struct net_bridge_vlan_group *vg, struct sk_buff *skb,
678			u16 *vid);
679bool br_allowed_egress(struct net_bridge_vlan_group *vg,
680		       const struct sk_buff *skb);
681bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
682struct sk_buff *br_handle_vlan(struct net_bridge *br,
 
683			       struct net_bridge_vlan_group *vg,
684			       struct sk_buff *skb);
685int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags);
 
686int br_vlan_delete(struct net_bridge *br, u16 vid);
687void br_vlan_flush(struct net_bridge *br);
688struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
689void br_recalculate_fwd_mask(struct net_bridge *br);
690int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
691int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
692int __br_vlan_set_proto(struct net_bridge *br, __be16 proto);
693int br_vlan_set_proto(struct net_bridge *br, unsigned long val);
 
 
 
 
694int br_vlan_init(struct net_bridge *br);
695int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val);
696int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid);
697int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags);
 
 
 
698int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
699void nbp_vlan_flush(struct net_bridge_port *port);
700int nbp_vlan_init(struct net_bridge_port *port);
701int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
702
703static inline struct net_bridge_vlan_group *br_vlan_group(
704					const struct net_bridge *br)
705{
706	return rtnl_dereference(br->vlgrp);
707}
708
709static inline struct net_bridge_vlan_group *nbp_vlan_group(
710					const struct net_bridge_port *p)
711{
712	return rtnl_dereference(p->vlgrp);
713}
714
715static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
716					const struct net_bridge *br)
717{
718	return rcu_dereference(br->vlgrp);
719}
720
721static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
722					const struct net_bridge_port *p)
723{
724	return rcu_dereference(p->vlgrp);
725}
726
727/* Since bridge now depends on 8021Q module, but the time bridge sees the
728 * skb, the vlan tag will always be present if the frame was tagged.
729 */
730static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
731{
732	int err = 0;
733
734	if (skb_vlan_tag_present(skb)) {
735		*vid = skb_vlan_tag_get(skb) & VLAN_VID_MASK;
736	} else {
737		*vid = 0;
738		err = -EINVAL;
739	}
740
741	return err;
742}
743
744static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
745{
746	if (!vg)
747		return 0;
748
749	smp_rmb();
750	return vg->pvid;
751}
752
753static inline int br_vlan_enabled(struct net_bridge *br)
754{
755	return br->vlan_enabled;
756}
757#else
758static inline bool br_allowed_ingress(const struct net_bridge *br,
759				      struct net_bridge_vlan_group *vg,
760				      struct sk_buff *skb,
761				      u16 *vid)
762{
763	return true;
764}
765
766static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
767				     const struct sk_buff *skb)
768{
769	return true;
770}
771
772static inline bool br_should_learn(struct net_bridge_port *p,
773				   struct sk_buff *skb, u16 *vid)
774{
775	return true;
776}
777
778static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
 
779					     struct net_bridge_vlan_group *vg,
780					     struct sk_buff *skb)
781{
782	return skb;
783}
784
785static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags)
 
786{
 
787	return -EOPNOTSUPP;
788}
789
790static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
791{
792	return -EOPNOTSUPP;
793}
794
795static inline void br_vlan_flush(struct net_bridge *br)
796{
797}
798
799static inline void br_recalculate_fwd_mask(struct net_bridge *br)
800{
801}
802
803static inline int br_vlan_init(struct net_bridge *br)
804{
805	return 0;
806}
807
808static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags)
 
809{
 
810	return -EOPNOTSUPP;
811}
812
813static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
814{
815	return -EOPNOTSUPP;
816}
817
818static inline void nbp_vlan_flush(struct net_bridge_port *port)
819{
820}
821
822static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
823						   u16 vid)
824{
825	return NULL;
826}
827
828static inline int nbp_vlan_init(struct net_bridge_port *port)
 
829{
830	return 0;
831}
832
833static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
834{
835	return 0;
836}
837
838static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
839{
840	return 0;
841}
842
843static inline int br_vlan_enabled(struct net_bridge *br)
 
 
 
 
 
 
 
 
844{
845	return 0;
846}
847
848static inline int __br_vlan_filter_toggle(struct net_bridge *br,
849					  unsigned long val)
 
850{
851	return -EOPNOTSUPP;
852}
853
854static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
855					 u32 filter_mask)
 
856{
857	return 0;
858}
859
860static inline struct net_bridge_vlan_group *br_vlan_group(
861					const struct net_bridge *br)
862{
863	return NULL;
864}
865
866static inline struct net_bridge_vlan_group *nbp_vlan_group(
867					const struct net_bridge_port *p)
868{
869	return NULL;
870}
871
872static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
873					const struct net_bridge *br)
874{
875	return NULL;
876}
877
878static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
879					const struct net_bridge_port *p)
880{
881	return NULL;
882}
883
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
884#endif
885
886struct nf_br_ops {
887	int (*br_dev_xmit_hook)(struct sk_buff *skb);
888};
889extern const struct nf_br_ops __rcu *nf_br_ops;
890
891/* br_netfilter.c */
892#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
893int br_nf_core_init(void);
894void br_nf_core_fini(void);
895void br_netfilter_rtable_init(struct net_bridge *);
896#else
897static inline int br_nf_core_init(void) { return 0; }
898static inline void br_nf_core_fini(void) {}
899#define br_netfilter_rtable_init(x)
900#endif
901
902/* br_stp.c */
903void br_set_state(struct net_bridge_port *p, unsigned int state);
904struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
905void br_init_port(struct net_bridge_port *p);
906void br_become_designated_port(struct net_bridge_port *p);
907
908void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
909int br_set_forward_delay(struct net_bridge *br, unsigned long x);
910int br_set_hello_time(struct net_bridge *br, unsigned long x);
911int br_set_max_age(struct net_bridge *br, unsigned long x);
912int br_set_ageing_time(struct net_bridge *br, u32 ageing_time);
 
913
914
915/* br_stp_if.c */
916void br_stp_enable_bridge(struct net_bridge *br);
917void br_stp_disable_bridge(struct net_bridge *br);
918void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
 
919void br_stp_enable_port(struct net_bridge_port *p);
920void br_stp_disable_port(struct net_bridge_port *p);
921bool br_stp_recalculate_bridge_id(struct net_bridge *br);
922void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
923void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
924int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
925int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
926ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
927
928/* br_stp_bpdu.c */
929struct stp_proto;
930void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
931		struct net_device *dev);
932
933/* br_stp_timer.c */
934void br_stp_timer_init(struct net_bridge *br);
935void br_stp_port_timer_init(struct net_bridge_port *p);
936unsigned long br_timer_value(const struct timer_list *timer);
937
938/* br.c */
939#if IS_ENABLED(CONFIG_ATM_LANE)
940extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
941#endif
942
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
943/* br_netlink.c */
944extern struct rtnl_link_ops br_link_ops;
945int br_netlink_init(void);
946void br_netlink_fini(void);
947void br_ifinfo_notify(int event, struct net_bridge_port *port);
948int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
 
 
 
 
949int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
950int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
951	       u32 filter_mask, int nlflags);
 
 
 
 
 
 
952
953#ifdef CONFIG_SYSFS
954/* br_sysfs_if.c */
955extern const struct sysfs_ops brport_sysfs_ops;
956int br_sysfs_addif(struct net_bridge_port *p);
957int br_sysfs_renameif(struct net_bridge_port *p);
958
959/* br_sysfs_br.c */
960int br_sysfs_addbr(struct net_device *dev);
961void br_sysfs_delbr(struct net_device *dev);
962
963#else
964
965static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
966static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
967static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
968static inline void br_sysfs_delbr(struct net_device *dev) { return; }
969#endif /* CONFIG_SYSFS */
970
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
971#endif