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bridge: Properly check if local fdb entry can be deleted in br_fdb_delete_by_port
[linux-2.6-block.git] / net / bridge / br_private.h
CommitLineData
1da177e4
LT		 1/*
2 * Linux ethernet bridge
3 *
4 * Authors:
5 * Lennert Buytenhek <buytenh@gnu.org>
6 *
1da177e4
LT		 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>
1da177e4 17#include <linux/if_bridge.h>
91d2c34a 18#include <linux/netpoll.h>
406818ff 19#include <linux/u64_stats_sync.h>
4adf0af6 20#include <net/route.h>
243a2e63 21#include <linux/if_vlan.h>
1da177e4
LT		 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)
243a2e63 30#define BR_VLAN_BITMAP_LEN BITS_TO_LONGS(VLAN_N_VID)
1da177e4 31
9cde0708
SH		 32#define BR_VERSION "2.3"
33
515853cc 34/* Control of forwarding link local multicast */
35#define BR_GROUPFWD_DEFAULT 0
36/* Don't allow forwarding control protocols like STP and LLDP */
37#define BR_GROUPFWD_RESTRICTED 0x4007u
38
9cde0708
SH		 39/* Path to usermode spanning tree program */
40#define BR_STP_PROG "/sbin/bridge-stp"
8cbb512e 41
1da177e4
LT		 42typedef struct bridge_id bridge_id;
43typedef struct mac_addr mac_addr;
44typedef __u16 port_id;
45
46struct bridge_id
47{
48 unsigned char prio[2];
49 unsigned char addr[6];
50};
51
52struct mac_addr
53{
54 unsigned char addr[6];
55};
56
8ef2a9a5
YH		 57struct br_ip
58{
59 union {
60 __be32 ip4;
dfd56b8b 61#if IS_ENABLED(CONFIG_IPV6)
08b202b6
YH		 62 struct in6_addr ip6;
63#endif
8ef2a9a5
YH		 64 } u;
65 __be16 proto;
b0e9a30d 66 __u16 vid;
8ef2a9a5
YH		 67};
68
cc0fdd80
LL		 69#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
70/* our own querier */
71struct bridge_mcast_query {
72 struct timer_list timer;
73 u32 startup_sent;
74};
75
76/* other querier */
77struct bridge_mcast_querier {
78 struct timer_list timer;
79 unsigned long delay_time;
80};
81#endif
82
243a2e63
VY		 83struct net_port_vlans {
84 u16 port_idx;
78851988 85 u16 pvid;
243a2e63
VY		 86 union {
87 struct net_bridge_port *port;
88 struct net_bridge *br;
89 } parent;
90 struct rcu_head rcu;
91 unsigned long vlan_bitmap[BR_VLAN_BITMAP_LEN];
35e03f3a 92 unsigned long untagged_bitmap[BR_VLAN_BITMAP_LEN];
6cbdceeb 93 u16 num_vlans;
243a2e63
VY		 94};
95
1da177e4
LT		 96struct net_bridge_fdb_entry
97{
98 struct hlist_node hlist;
99 struct net_bridge_port *dst;
100
101 struct rcu_head rcu;
7cd8861a 102 unsigned long updated;
103 unsigned long used;
1da177e4
LT		 104 mac_addr addr;
105 unsigned char is_local;
106 unsigned char is_static;
a5642ab4 107 unsigned char added_by_user;
2ba071ec 108 __u16 vlan_id;
1da177e4
LT		 109};
110
eb1d1641
HX		 111struct net_bridge_port_group {
112 struct net_bridge_port *port;
e8051688 113 struct net_bridge_port_group __rcu *next;
eb1d1641
HX		 114 struct hlist_node mglist;
115 struct rcu_head rcu;
116 struct timer_list timer;
8ef2a9a5 117 struct br_ip addr;
ccb1c31a 118 unsigned char state;
eb1d1641
HX		 119};
120
121struct net_bridge_mdb_entry
122{
123 struct hlist_node hlist[2];
eb1d1641 124 struct net_bridge *br;
e8051688 125 struct net_bridge_port_group __rcu *ports;
eb1d1641
HX		 126 struct rcu_head rcu;
127 struct timer_list timer;
8ef2a9a5 128 struct br_ip addr;
8a870178 129 bool mglist;
eb1d1641
HX		 130};
131
132struct net_bridge_mdb_htable
133{
134 struct hlist_head *mhash;
135 struct rcu_head rcu;
136 struct net_bridge_mdb_htable *old;
137 u32 size;
138 u32 max;
139 u32 secret;
140 u32 ver;
141};
142
1da177e4
LT		 143struct net_bridge_port
144{
145 struct net_bridge *br;
146 struct net_device *dev;
147 struct list_head list;
148
149 /* STP */
150 u8 priority;
151 u8 state;
152 u16 port_no;
153 unsigned char topology_change_ack;
154 unsigned char config_pending;
155 port_id port_id;
156 port_id designated_port;
157 bridge_id designated_root;
158 bridge_id designated_bridge;
159 u32 path_cost;
160 u32 designated_cost;
0c03150e 161 unsigned long designated_age;
1da177e4
LT		 162
163 struct timer_list forward_delay_timer;
164 struct timer_list hold_timer;
165 struct timer_list message_age_timer;
166 struct kobject kobj;
167 struct rcu_head rcu;
3982d3d2
FA		 168
169 unsigned long flags;
170#define BR_HAIRPIN_MODE 0x00000001
a2e01a65 171#define BR_BPDU_GUARD 0x00000002
1007dd1a 172#define BR_ROOT_BLOCK 0x00000004
c2d3babf 173#define BR_MULTICAST_FAST_LEAVE 0x00000008
8f3359bd 174#define BR_ADMIN_COST 0x00000010
9ba18891 175#define BR_LEARNING 0x00000020
867a5943 176#define BR_FLOOD 0x00000040
eb1d1641
HX		 177
178#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
cc0fdd80
LL		 179 struct bridge_mcast_query ip4_query;
180#if IS_ENABLED(CONFIG_IPV6)
181 struct bridge_mcast_query ip6_query;
182#endif /* IS_ENABLED(CONFIG_IPV6) */
eb1d1641
HX		 183 unsigned char multicast_router;
184 struct timer_list multicast_router_timer;
eb1d1641
HX		 185 struct hlist_head mglist;
186 struct hlist_node rlist;
187#endif
e0f43752
SA		 188
189#ifdef CONFIG_SYSFS
190 char sysfs_name[IFNAMSIZ];
191#endif
91d2c34a
HX		 192
193#ifdef CONFIG_NET_POLL_CONTROLLER
194 struct netpoll *np;
195#endif
243a2e63
VY		 196#ifdef CONFIG_BRIDGE_VLAN_FILTERING
197 struct net_port_vlans __rcu *vlan_info;
198#endif
1da177e4
LT		 199};
200
f350a0a8
JP		 201#define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
202
b5ed54e9 203static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
204{
716ec052 205 return rcu_dereference(dev->rx_handler_data);
b5ed54e9 206}
207
1fb1754a 208static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
b5ed54e9 209{
ec1e5610
ED		 210 return br_port_exists(dev) ?
211 rtnl_dereference(dev->rx_handler_data) : NULL;
b5ed54e9 212}
213
1da177e4
LT		 214struct net_bridge
215{
216 spinlock_t lock;
217 struct list_head port_list;
218 struct net_device *dev;
14bb4789 219
8f84985f 220 struct pcpu_sw_netstats __percpu *stats;
1da177e4
LT		 221 spinlock_t hash_lock;
222 struct hlist_head hash[BR_HASH_SIZE];
4adf0af6
SW		 223#ifdef CONFIG_BRIDGE_NETFILTER
224 struct rtable fake_rtable;
4df53d8b
PM		 225 bool nf_call_iptables;
226 bool nf_call_ip6tables;
227 bool nf_call_arptables;
4adf0af6 228#endif
515853cc 229 u16 group_fwd_mask;
230
1da177e4
LT		 231 /* STP */
232 bridge_id designated_root;
233 bridge_id bridge_id;
234 u32 root_path_cost;
235 unsigned long max_age;
236 unsigned long hello_time;
237 unsigned long forward_delay;
238 unsigned long bridge_max_age;
239 unsigned long ageing_time;
240 unsigned long bridge_hello_time;
241 unsigned long bridge_forward_delay;
242
fda93d92 243 u8 group_addr[ETH_ALEN];
1da177e4 244 u16 root_port;
9cde0708
SH		 245
246 enum {
247 BR_NO_STP, /* no spanning tree */
248 BR_KERNEL_STP, /* old STP in kernel */
249 BR_USER_STP, /* new RSTP in userspace */
250 } stp_enabled;
251
1da177e4
LT		 252 unsigned char topology_change;
253 unsigned char topology_change_detected;
254
eb1d1641
HX		 255#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
256 unsigned char multicast_router;
257
258 u8 multicast_disabled:1;
c5c23260 259 u8 multicast_querier:1;
1c8ad5bf 260 u8 multicast_query_use_ifaddr:1;
eb1d1641
HX		 261
262 u32 hash_elasticity;
263 u32 hash_max;
264
265 u32 multicast_last_member_count;
eb1d1641
HX		 266 u32 multicast_startup_query_count;
267
268 unsigned long multicast_last_member_interval;
269 unsigned long multicast_membership_interval;
270 unsigned long multicast_querier_interval;
271 unsigned long multicast_query_interval;
272 unsigned long multicast_query_response_interval;
273 unsigned long multicast_startup_query_interval;
274
275 spinlock_t multicast_lock;
e8051688 276 struct net_bridge_mdb_htable __rcu *mdb;
eb1d1641 277 struct hlist_head router_list;
eb1d1641
HX		 278
279 struct timer_list multicast_router_timer;
cc0fdd80
LL		 280 struct bridge_mcast_querier ip4_querier;
281 struct bridge_mcast_query ip4_query;
282#if IS_ENABLED(CONFIG_IPV6)
283 struct bridge_mcast_querier ip6_querier;
284 struct bridge_mcast_query ip6_query;
285#endif /* IS_ENABLED(CONFIG_IPV6) */
eb1d1641
HX		 286#endif
287
1da177e4
LT		 288 struct timer_list hello_timer;
289 struct timer_list tcn_timer;
290 struct timer_list topology_change_timer;
291 struct timer_list gc_timer;
43b98c4a 292 struct kobject *ifobj;
243a2e63
VY		 293#ifdef CONFIG_BRIDGE_VLAN_FILTERING
294 u8 vlan_enabled;
295 struct net_port_vlans __rcu *vlan_info;
296#endif
1da177e4
LT		 297};
298
68b7c895
HX		 299struct br_input_skb_cb {
300 struct net_device *brdev;
32dec5dd 301#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
eb1d1641
HX		 302 int igmp;
303 int mrouters_only;
32dec5dd 304#endif
68b7c895
HX		 305};
306
307#define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
308
32dec5dd
YH		 309#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
310# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
311#else
312# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
313#endif
314
28a16c97 315#define br_printk(level, br, format, args...) \
316 printk(level "%s: " format, (br)->dev->name, ##args)
317
318#define br_err(__br, format, args...) \
319 br_printk(KERN_ERR, __br, format, ##args)
320#define br_warn(__br, format, args...) \
321 br_printk(KERN_WARNING, __br, format, ##args)
322#define br_notice(__br, format, args...) \
323 br_printk(KERN_NOTICE, __br, format, ##args)
324#define br_info(__br, format, args...) \
325 br_printk(KERN_INFO, __br, format, ##args)
326
327#define br_debug(br, format, args...) \
328 pr_debug("%s: " format, (br)->dev->name, ##args)
329
1da177e4 330extern struct notifier_block br_device_notifier;
1da177e4
LT		 331
332/* called under bridge lock */
333static inline int br_is_root_bridge(const struct net_bridge *br)
334{
335 return !memcmp(&br->bridge_id, &br->designated_root, 8);
336}
337
1da177e4 338/* br_device.c */
348662a1
JP		 339void br_dev_setup(struct net_device *dev);
340void br_dev_delete(struct net_device *dev, struct list_head *list);
341netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
cfb478da 342#ifdef CONFIG_NET_POLL_CONTROLLER
91d2c34a
HX		 343static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
344 struct sk_buff *skb)
345{
346 struct netpoll *np = p->np;
347
348 if (np)
349 netpoll_send_skb(np, skb);
350}
351
348662a1
JP		 352int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp);
353void br_netpoll_disable(struct net_bridge_port *p);
cfb478da 354#else
9f70b0fc 355static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
91d2c34a
HX		 356 struct sk_buff *skb)
357{
358}
cfb478da 359
47be03a2 360static inline int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp)
91d2c34a
HX		 361{
362 return 0;
363}
364
365static inline void br_netpoll_disable(struct net_bridge_port *p)
366{
367}
cfb478da 368#endif
1da177e4
LT		 369
370/* br_fdb.c */
348662a1
JP		 371int br_fdb_init(void);
372void br_fdb_fini(void);
373void br_fdb_flush(struct net_bridge *br);
374void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
375void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
376void br_fdb_cleanup(unsigned long arg);
377void br_fdb_delete_by_port(struct net_bridge *br,
378 const struct net_bridge_port *p, int do_all);
379struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
380 const unsigned char *addr, __u16 vid);
381int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
382int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
383 unsigned long off);
384int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
385 const unsigned char *addr, u16 vid);
386void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
a5642ab4 387 const unsigned char *addr, u16 vid, bool added_by_user);
348662a1
JP		 388int fdb_delete_by_addr(struct net_bridge *br, const u8 *addr, u16 vid);
389
390int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
391 struct net_device *dev, const unsigned char *addr);
392int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
393 const unsigned char *addr, u16 nlh_flags);
394int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
395 struct net_device *dev, int idx);
1da177e4
LT		 396
397/* br_forward.c */
348662a1
JP		 398void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb);
399int br_dev_queue_push_xmit(struct sk_buff *skb);
400void br_forward(const struct net_bridge_port *to,
7f7708f0 401 struct sk_buff *skb, struct sk_buff *skb0);
348662a1
JP		 402int br_forward_finish(struct sk_buff *skb);
403void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast);
404void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
405 struct sk_buff *skb2, bool unicast);
1da177e4
LT		 406
407/* br_if.c */
348662a1
JP		 408void br_port_carrier_check(struct net_bridge_port *p);
409int br_add_bridge(struct net *net, const char *name);
410int br_del_bridge(struct net *net, const char *name);
348662a1
JP		 411int br_add_if(struct net_bridge *br, struct net_device *dev);
412int br_del_if(struct net_bridge *br, struct net_device *dev);
413int br_min_mtu(const struct net_bridge *br);
414netdev_features_t br_features_recompute(struct net_bridge *br,
415 netdev_features_t features);
1da177e4
LT		 416
417/* br_input.c */
348662a1
JP		 418int br_handle_frame_finish(struct sk_buff *skb);
419rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
1da177e4 420
859828c0
JP		 421static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
422{
423 return rcu_dereference(dev->rx_handler) == br_handle_frame;
424}
425
426static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
427{
428 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
429}
430
1da177e4 431/* br_ioctl.c */
348662a1
JP		 432int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
433int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
434 void __user *arg);
1da177e4 435
eb1d1641
HX		 436/* br_multicast.c */
437#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
2ce297fc 438extern unsigned int br_mdb_rehash_seq;
348662a1 439int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
394efd19 440 struct sk_buff *skb, u16 vid);
348662a1
JP		 441struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
442 struct sk_buff *skb, u16 vid);
443void br_multicast_add_port(struct net_bridge_port *port);
444void br_multicast_del_port(struct net_bridge_port *port);
445void br_multicast_enable_port(struct net_bridge_port *port);
446void br_multicast_disable_port(struct net_bridge_port *port);
447void br_multicast_init(struct net_bridge *br);
448void br_multicast_open(struct net_bridge *br);
449void br_multicast_stop(struct net_bridge *br);
450void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
451 struct sk_buff *skb);
452void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
453 struct sk_buff *skb, struct sk_buff *skb2);
454int br_multicast_set_router(struct net_bridge *br, unsigned long val);
455int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
456int br_multicast_toggle(struct net_bridge *br, unsigned long val);
457int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
458int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
459struct net_bridge_mdb_entry *
460br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst);
461struct net_bridge_mdb_entry *
462br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port,
463 struct br_ip *group);
464void br_multicast_free_pg(struct rcu_head *head);
465struct net_bridge_port_group *
466br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
467 struct net_bridge_port_group __rcu *next,
468 unsigned char state);
469void br_mdb_init(void);
470void br_mdb_uninit(void);
471void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
472 struct br_ip *group, int type);
85b35269 473
cfd56754
CW		 474#define mlock_dereference(X, br) \
475 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
476
85b35269
SS		 477static inline bool br_multicast_is_router(struct net_bridge *br)
478{
479 return br->multicast_router == 2 ||
480 (br->multicast_router == 1 &&
481 timer_pending(&br->multicast_router_timer));
482}
b00589af 483
cc0fdd80
LL		 484static inline bool
485__br_multicast_querier_exists(struct net_bridge *br,
486 struct bridge_mcast_querier *querier)
b00589af 487{
cc0fdd80
LL		 488 return time_is_before_jiffies(querier->delay_time) &&
489 (br->multicast_querier || timer_pending(&querier->timer));
490}
491
492static inline bool br_multicast_querier_exists(struct net_bridge *br,
493 struct ethhdr *eth)
494{
495 switch (eth->h_proto) {
496 case (htons(ETH_P_IP)):
497 return __br_multicast_querier_exists(br, &br->ip4_querier);
498#if IS_ENABLED(CONFIG_IPV6)
499 case (htons(ETH_P_IPV6)):
500 return __br_multicast_querier_exists(br, &br->ip6_querier);
501#endif
502 default:
503 return false;
504 }
b00589af 505}
eb1d1641
HX		 506#else
507static inline int br_multicast_rcv(struct net_bridge *br,
508 struct net_bridge_port *port,
06499098
VY		 509 struct sk_buff *skb,
510 u16 vid)
eb1d1641
HX		 511{
512 return 0;
513}
514
515static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
fbca58a2 516 struct sk_buff *skb, u16 vid)
eb1d1641
HX		 517{
518 return NULL;
519}
520
521static inline void br_multicast_add_port(struct net_bridge_port *port)
522{
523}
524
525static inline void br_multicast_del_port(struct net_bridge_port *port)
526{
527}
528
529static inline void br_multicast_enable_port(struct net_bridge_port *port)
530{
531}
532
533static inline void br_multicast_disable_port(struct net_bridge_port *port)
534{
535}
536
537static inline void br_multicast_init(struct net_bridge *br)
538{
539}
540
541static inline void br_multicast_open(struct net_bridge *br)
542{
543}
544
545static inline void br_multicast_stop(struct net_bridge *br)
546{
547}
5cb5e947
HX		 548
549static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
550 struct sk_buff *skb)
551{
552}
553
554static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
555 struct sk_buff *skb,
556 struct sk_buff *skb2)
557{
558}
eb1d1641
HX		 559static inline bool br_multicast_is_router(struct net_bridge *br)
560{
85b35269 561 return 0;
eb1d1641 562}
cc0fdd80
LL		 563static inline bool br_multicast_querier_exists(struct net_bridge *br,
564 struct ethhdr *eth)
b00589af
LL		 565{
566 return false;
567}
fdb184d1
RR		 568static inline void br_mdb_init(void)
569{
570}
571static inline void br_mdb_uninit(void)
572{
573}
85b35269 574#endif
eb1d1641 575
243a2e63
VY		 576/* br_vlan.c */
577#ifdef CONFIG_BRIDGE_VLAN_FILTERING
348662a1
JP		 578bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v,
579 struct sk_buff *skb, u16 *vid);
580bool br_allowed_egress(struct net_bridge *br, const struct net_port_vlans *v,
581 const struct sk_buff *skb);
582struct sk_buff *br_handle_vlan(struct net_bridge *br,
583 const struct net_port_vlans *v,
584 struct sk_buff *skb);
585int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags);
586int br_vlan_delete(struct net_bridge *br, u16 vid);
587void br_vlan_flush(struct net_bridge *br);
2b292fb4 588bool br_vlan_find(struct net_bridge *br, u16 vid);
348662a1
JP		 589int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
590int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags);
591int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
592void nbp_vlan_flush(struct net_bridge_port *port);
593bool nbp_vlan_find(struct net_bridge_port *port, u16 vid);
a37b85c9
VY		 594
595static inline struct net_port_vlans *br_get_vlan_info(
596 const struct net_bridge *br)
597{
1690be63 598 return rcu_dereference_rtnl(br->vlan_info);
a37b85c9
VY		 599}
600
601static inline struct net_port_vlans *nbp_get_vlan_info(
602 const struct net_bridge_port *p)
603{
1690be63 604 return rcu_dereference_rtnl(p->vlan_info);
a37b85c9
VY		 605}
606
607/* Since bridge now depends on 8021Q module, but the time bridge sees the
608 * skb, the vlan tag will always be present if the frame was tagged.
609 */
610static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
611{
612 int err = 0;
613
614 if (vlan_tx_tag_present(skb))
615 *vid = vlan_tx_tag_get(skb) & VLAN_VID_MASK;
616 else {
617 *vid = 0;
618 err = -EINVAL;
619 }
620
621 return err;
622}
78851988
VY		 623
624static inline u16 br_get_pvid(const struct net_port_vlans *v)
625{
626 /* Return just the VID if it is set, or VLAN_N_VID (invalid vid) if
627 * vid wasn't set
628 */
629 smp_rmb();
d1c6c708 630 return v->pvid ?: VLAN_N_VID;
78851988
VY		 631}
632
243a2e63 633#else
a37b85c9
VY		 634static inline bool br_allowed_ingress(struct net_bridge *br,
635 struct net_port_vlans *v,
78851988
VY		 636 struct sk_buff *skb,
637 u16 *vid)
a37b85c9
VY		 638{
639 return true;
640}
641
85f46c6b
VY		 642static inline bool br_allowed_egress(struct net_bridge *br,
643 const struct net_port_vlans *v,
644 const struct sk_buff *skb)
645{
646 return true;
647}
648
78851988
VY		 649static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
650 const struct net_port_vlans *v,
651 struct sk_buff *skb)
652{
653 return skb;
654}
655
552406c4 656static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags)
243a2e63
VY		 657{
658 return -EOPNOTSUPP;
659}
660
661static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
662{
663 return -EOPNOTSUPP;
664}
665
666static inline void br_vlan_flush(struct net_bridge *br)
667{
668}
669
2b292fb4
TM		 670static inline bool br_vlan_find(struct net_bridge *br, u16 vid)
671{
672 return false;
673}
674
552406c4 675static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags)
243a2e63
VY		 676{
677 return -EOPNOTSUPP;
678}
679
680static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
681{
682 return -EOPNOTSUPP;
683}
684
685static inline void nbp_vlan_flush(struct net_bridge_port *port)
686{
687}
688
a37b85c9
VY		 689static inline struct net_port_vlans *br_get_vlan_info(
690 const struct net_bridge *br)
691{
692 return NULL;
693}
694static inline struct net_port_vlans *nbp_get_vlan_info(
695 const struct net_bridge_port *p)
696{
697 return NULL;
698}
699
bc9a25d2
VY		 700static inline bool nbp_vlan_find(struct net_bridge_port *port, u16 vid)
701{
702 return false;
703}
704
78851988 705static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
a37b85c9
VY		 706{
707 return 0;
708}
78851988
VY		 709static inline u16 br_get_pvid(const struct net_port_vlans *v)
710{
711 return VLAN_N_VID; /* Returns invalid vid */
712}
243a2e63
VY		 713#endif
714
1da177e4 715/* br_netfilter.c */
c0909713 716#ifdef CONFIG_BRIDGE_NETFILTER
348662a1
JP		 717int br_netfilter_init(void);
718void br_netfilter_fini(void);
719void br_netfilter_rtable_init(struct net_bridge *);
c0909713
SH		 720#else
721#define br_netfilter_init() (0)
31a5b837 722#define br_netfilter_fini() do { } while (0)
4adf0af6 723#define br_netfilter_rtable_init(x)
c0909713 724#endif
1da177e4
LT		 725
726/* br_stp.c */
348662a1
JP		 727void br_log_state(const struct net_bridge_port *p);
728struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
729void br_init_port(struct net_bridge_port *p);
730void br_become_designated_port(struct net_bridge_port *p);
1da177e4 731
348662a1
JP		 732void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
733int br_set_forward_delay(struct net_bridge *br, unsigned long x);
734int br_set_hello_time(struct net_bridge *br, unsigned long x);
735int br_set_max_age(struct net_bridge *br, unsigned long x);
14f98f25 736
737
1da177e4 738/* br_stp_if.c */
348662a1
JP		 739void br_stp_enable_bridge(struct net_bridge *br);
740void br_stp_disable_bridge(struct net_bridge *br);
741void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
742void br_stp_enable_port(struct net_bridge_port *p);
743void br_stp_disable_port(struct net_bridge_port *p);
744bool br_stp_recalculate_bridge_id(struct net_bridge *br);
745void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
746void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
747int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
748int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
749ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
1da177e4
LT		 750
751/* br_stp_bpdu.c */
7c85fbf0 752struct stp_proto;
348662a1
JP		 753void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
754 struct net_device *dev);
1da177e4
LT		 755
756/* br_stp_timer.c */
348662a1
JP		 757void br_stp_timer_init(struct net_bridge *br);
758void br_stp_port_timer_init(struct net_bridge_port *p);
759unsigned long br_timer_value(const struct timer_list *timer);
1da177e4
LT		 760
761/* br.c */
e6373c4c 762#if IS_ENABLED(CONFIG_ATM_LANE)
da678292
MM		 763extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
764#endif
1da177e4 765
11dc1f36 766/* br_netlink.c */
149ddd83 767extern struct rtnl_link_ops br_link_ops;
348662a1
JP		 768int br_netlink_init(void);
769void br_netlink_fini(void);
770void br_ifinfo_notify(int event, struct net_bridge_port *port);
771int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg);
772int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg);
773int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
774 u32 filter_mask);
11dc1f36 775
1da177e4
LT		 776#ifdef CONFIG_SYSFS
777/* br_sysfs_if.c */
52cf25d0 778extern const struct sysfs_ops brport_sysfs_ops;
348662a1
JP		 779int br_sysfs_addif(struct net_bridge_port *p);
780int br_sysfs_renameif(struct net_bridge_port *p);
1da177e4
LT		 781
782/* br_sysfs_br.c */
348662a1
JP		 783int br_sysfs_addbr(struct net_device *dev);
784void br_sysfs_delbr(struct net_device *dev);
1da177e4
LT		 785
786#else
787
0cb2bbbe
LJ		 788static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
789static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
790static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
791static inline void br_sysfs_delbr(struct net_device *dev) { return; }
1da177e4
LT		 792#endif /* CONFIG_SYSFS */
793
794#endif
Linux 6.x block layer and io_uring tree(s)