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Merge branch 'cxgb4'
[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];
e5a727f6 49 unsigned char addr[ETH_ALEN];
1da177e4
LT		 50};
51
52struct mac_addr
53{
e5a727f6 54 unsigned char addr[ETH_ALEN];
1da177e4
LT		 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
e028e4b8 177#define BR_AUTO_MASK (BR_FLOOD | BR_LEARNING)
f3a6ddf1 178#define BR_PROMISC 0x00000080
eb1d1641
HX		 179
180#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
cc0fdd80
LL		 181 struct bridge_mcast_query ip4_query;
182#if IS_ENABLED(CONFIG_IPV6)
183 struct bridge_mcast_query ip6_query;
184#endif /* IS_ENABLED(CONFIG_IPV6) */
eb1d1641
HX		 185 unsigned char multicast_router;
186 struct timer_list multicast_router_timer;
eb1d1641
HX		 187 struct hlist_head mglist;
188 struct hlist_node rlist;
189#endif
e0f43752
SA		 190
191#ifdef CONFIG_SYSFS
192 char sysfs_name[IFNAMSIZ];
193#endif
91d2c34a
HX		 194
195#ifdef CONFIG_NET_POLL_CONTROLLER
196 struct netpoll *np;
197#endif
243a2e63
VY		 198#ifdef CONFIG_BRIDGE_VLAN_FILTERING
199 struct net_port_vlans __rcu *vlan_info;
200#endif
1da177e4
LT		 201};
202
e028e4b8 203#define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
f3a6ddf1 204#define br_promisc_port(p) ((p)->flags & BR_PROMISC)
e028e4b8 205
f350a0a8
JP		 206#define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
207
b5ed54e9 208static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
209{
716ec052 210 return rcu_dereference(dev->rx_handler_data);
b5ed54e9 211}
212
1fb1754a 213static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
b5ed54e9 214{
ec1e5610
ED		 215 return br_port_exists(dev) ?
216 rtnl_dereference(dev->rx_handler_data) : NULL;
b5ed54e9 217}
218
1da177e4
LT		 219struct net_bridge
220{
221 spinlock_t lock;
222 struct list_head port_list;
223 struct net_device *dev;
14bb4789 224
8f84985f 225 struct pcpu_sw_netstats __percpu *stats;
1da177e4
LT		 226 spinlock_t hash_lock;
227 struct hlist_head hash[BR_HASH_SIZE];
4adf0af6
SW		 228#ifdef CONFIG_BRIDGE_NETFILTER
229 struct rtable fake_rtable;
4df53d8b
PM		 230 bool nf_call_iptables;
231 bool nf_call_ip6tables;
232 bool nf_call_arptables;
4adf0af6 233#endif
515853cc 234 u16 group_fwd_mask;
235
1da177e4
LT		 236 /* STP */
237 bridge_id designated_root;
238 bridge_id bridge_id;
239 u32 root_path_cost;
240 unsigned long max_age;
241 unsigned long hello_time;
242 unsigned long forward_delay;
243 unsigned long bridge_max_age;
244 unsigned long ageing_time;
245 unsigned long bridge_hello_time;
246 unsigned long bridge_forward_delay;
247
fda93d92 248 u8 group_addr[ETH_ALEN];
1da177e4 249 u16 root_port;
9cde0708
SH		 250
251 enum {
252 BR_NO_STP, /* no spanning tree */
253 BR_KERNEL_STP, /* old STP in kernel */
254 BR_USER_STP, /* new RSTP in userspace */
255 } stp_enabled;
256
1da177e4
LT		 257 unsigned char topology_change;
258 unsigned char topology_change_detected;
259
eb1d1641
HX		 260#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
261 unsigned char multicast_router;
262
263 u8 multicast_disabled:1;
c5c23260 264 u8 multicast_querier:1;
1c8ad5bf 265 u8 multicast_query_use_ifaddr:1;
eb1d1641
HX		 266
267 u32 hash_elasticity;
268 u32 hash_max;
269
270 u32 multicast_last_member_count;
eb1d1641
HX		 271 u32 multicast_startup_query_count;
272
273 unsigned long multicast_last_member_interval;
274 unsigned long multicast_membership_interval;
275 unsigned long multicast_querier_interval;
276 unsigned long multicast_query_interval;
277 unsigned long multicast_query_response_interval;
278 unsigned long multicast_startup_query_interval;
279
280 spinlock_t multicast_lock;
e8051688 281 struct net_bridge_mdb_htable __rcu *mdb;
eb1d1641 282 struct hlist_head router_list;
eb1d1641
HX		 283
284 struct timer_list multicast_router_timer;
cc0fdd80
LL		 285 struct bridge_mcast_querier ip4_querier;
286 struct bridge_mcast_query ip4_query;
287#if IS_ENABLED(CONFIG_IPV6)
288 struct bridge_mcast_querier ip6_querier;
289 struct bridge_mcast_query ip6_query;
290#endif /* IS_ENABLED(CONFIG_IPV6) */
eb1d1641
HX		 291#endif
292
1da177e4
LT		 293 struct timer_list hello_timer;
294 struct timer_list tcn_timer;
295 struct timer_list topology_change_timer;
296 struct timer_list gc_timer;
43b98c4a 297 struct kobject *ifobj;
e028e4b8 298 u32 auto_cnt;
243a2e63
VY		 299#ifdef CONFIG_BRIDGE_VLAN_FILTERING
300 u8 vlan_enabled;
301 struct net_port_vlans __rcu *vlan_info;
302#endif
1da177e4
LT		 303};
304
68b7c895
HX		 305struct br_input_skb_cb {
306 struct net_device *brdev;
32dec5dd 307#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
eb1d1641
HX		 308 int igmp;
309 int mrouters_only;
32dec5dd 310#endif
68b7c895
HX		 311};
312
313#define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
314
32dec5dd
YH		 315#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
316# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
317#else
318# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
319#endif
320
28a16c97 321#define br_printk(level, br, format, args...) \
322 printk(level "%s: " format, (br)->dev->name, ##args)
323
324#define br_err(__br, format, args...) \
325 br_printk(KERN_ERR, __br, format, ##args)
326#define br_warn(__br, format, args...) \
327 br_printk(KERN_WARNING, __br, format, ##args)
328#define br_notice(__br, format, args...) \
329 br_printk(KERN_NOTICE, __br, format, ##args)
330#define br_info(__br, format, args...) \
331 br_printk(KERN_INFO, __br, format, ##args)
332
333#define br_debug(br, format, args...) \
334 pr_debug("%s: " format, (br)->dev->name, ##args)
335
1da177e4
LT		 336/* called under bridge lock */
337static inline int br_is_root_bridge(const struct net_bridge *br)
338{
339 return !memcmp(&br->bridge_id, &br->designated_root, 8);
340}
341
1da177e4 342/* br_device.c */
348662a1
JP		 343void br_dev_setup(struct net_device *dev);
344void br_dev_delete(struct net_device *dev, struct list_head *list);
345netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
cfb478da 346#ifdef CONFIG_NET_POLL_CONTROLLER
91d2c34a
HX		 347static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
348 struct sk_buff *skb)
349{
350 struct netpoll *np = p->np;
351
352 if (np)
353 netpoll_send_skb(np, skb);
354}
355
a8779ec1 356int br_netpoll_enable(struct net_bridge_port *p);
348662a1 357void br_netpoll_disable(struct net_bridge_port *p);
cfb478da 358#else
9f70b0fc 359static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
91d2c34a
HX		 360 struct sk_buff *skb)
361{
362}
cfb478da 363
a8779ec1 364static inline int br_netpoll_enable(struct net_bridge_port *p)
91d2c34a
HX		 365{
366 return 0;
367}
368
369static inline void br_netpoll_disable(struct net_bridge_port *p)
370{
371}
cfb478da 372#endif
1da177e4
LT		 373
374/* br_fdb.c */
348662a1
JP		 375int br_fdb_init(void);
376void br_fdb_fini(void);
377void br_fdb_flush(struct net_bridge *br);
424bb9c9
TM		 378void br_fdb_find_delete_local(struct net_bridge *br,
379 const struct net_bridge_port *p,
380 const unsigned char *addr, u16 vid);
348662a1
JP		 381void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
382void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
383void br_fdb_cleanup(unsigned long arg);
384void br_fdb_delete_by_port(struct net_bridge *br,
385 const struct net_bridge_port *p, int do_all);
386struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
387 const unsigned char *addr, __u16 vid);
388int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
389int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
390 unsigned long off);
391int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
392 const unsigned char *addr, u16 vid);
393void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
a5642ab4 394 const unsigned char *addr, u16 vid, bool added_by_user);
348662a1
JP		 395
396int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
397 struct net_device *dev, const unsigned char *addr);
398int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
399 const unsigned char *addr, u16 nlh_flags);
400int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
401 struct net_device *dev, int idx);
8db24af7
VY		 402int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
403void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
1da177e4
LT		 404
405/* br_forward.c */
348662a1
JP		 406void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb);
407int br_dev_queue_push_xmit(struct sk_buff *skb);
408void br_forward(const struct net_bridge_port *to,
7f7708f0 409 struct sk_buff *skb, struct sk_buff *skb0);
348662a1
JP		 410int br_forward_finish(struct sk_buff *skb);
411void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast);
412void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
413 struct sk_buff *skb2, bool unicast);
1da177e4
LT		 414
415/* br_if.c */
348662a1
JP		 416void br_port_carrier_check(struct net_bridge_port *p);
417int br_add_bridge(struct net *net, const char *name);
418int br_del_bridge(struct net *net, const char *name);
348662a1
JP		 419int br_add_if(struct net_bridge *br, struct net_device *dev);
420int br_del_if(struct net_bridge *br, struct net_device *dev);
421int br_min_mtu(const struct net_bridge *br);
422netdev_features_t br_features_recompute(struct net_bridge *br,
423 netdev_features_t features);
e028e4b8 424void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
2796d0c6 425void br_manage_promisc(struct net_bridge *br);
1da177e4
LT		 426
427/* br_input.c */
348662a1
JP		 428int br_handle_frame_finish(struct sk_buff *skb);
429rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
1da177e4 430
859828c0
JP		 431static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
432{
433 return rcu_dereference(dev->rx_handler) == br_handle_frame;
434}
435
436static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
437{
438 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
439}
440
1da177e4 441/* br_ioctl.c */
348662a1
JP		 442int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
443int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
444 void __user *arg);
1da177e4 445
eb1d1641
HX		 446/* br_multicast.c */
447#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
2ce297fc 448extern unsigned int br_mdb_rehash_seq;
348662a1 449int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
394efd19 450 struct sk_buff *skb, u16 vid);
348662a1
JP		 451struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
452 struct sk_buff *skb, u16 vid);
453void br_multicast_add_port(struct net_bridge_port *port);
454void br_multicast_del_port(struct net_bridge_port *port);
455void br_multicast_enable_port(struct net_bridge_port *port);
456void br_multicast_disable_port(struct net_bridge_port *port);
457void br_multicast_init(struct net_bridge *br);
458void br_multicast_open(struct net_bridge *br);
459void br_multicast_stop(struct net_bridge *br);
460void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
461 struct sk_buff *skb);
462void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
463 struct sk_buff *skb, struct sk_buff *skb2);
464int br_multicast_set_router(struct net_bridge *br, unsigned long val);
465int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
466int br_multicast_toggle(struct net_bridge *br, unsigned long val);
467int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
468int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
469struct net_bridge_mdb_entry *
470br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst);
471struct net_bridge_mdb_entry *
472br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port,
473 struct br_ip *group);
474void br_multicast_free_pg(struct rcu_head *head);
475struct net_bridge_port_group *
476br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
477 struct net_bridge_port_group __rcu *next,
478 unsigned char state);
479void br_mdb_init(void);
480void br_mdb_uninit(void);
481void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
482 struct br_ip *group, int type);
85b35269 483
cfd56754
CW		 484#define mlock_dereference(X, br) \
485 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
486
85b35269
SS		 487static inline bool br_multicast_is_router(struct net_bridge *br)
488{
489 return br->multicast_router == 2 ||
490 (br->multicast_router == 1 &&
491 timer_pending(&br->multicast_router_timer));
492}
b00589af 493
cc0fdd80
LL		 494static inline bool
495__br_multicast_querier_exists(struct net_bridge *br,
496 struct bridge_mcast_querier *querier)
b00589af 497{
cc0fdd80
LL		 498 return time_is_before_jiffies(querier->delay_time) &&
499 (br->multicast_querier || timer_pending(&querier->timer));
500}
501
502static inline bool br_multicast_querier_exists(struct net_bridge *br,
503 struct ethhdr *eth)
504{
505 switch (eth->h_proto) {
506 case (htons(ETH_P_IP)):
507 return __br_multicast_querier_exists(br, &br->ip4_querier);
508#if IS_ENABLED(CONFIG_IPV6)
509 case (htons(ETH_P_IPV6)):
510 return __br_multicast_querier_exists(br, &br->ip6_querier);
511#endif
512 default:
513 return false;
514 }
b00589af 515}
eb1d1641
HX		 516#else
517static inline int br_multicast_rcv(struct net_bridge *br,
518 struct net_bridge_port *port,
06499098
VY		 519 struct sk_buff *skb,
520 u16 vid)
eb1d1641
HX		 521{
522 return 0;
523}
524
525static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
fbca58a2 526 struct sk_buff *skb, u16 vid)
eb1d1641
HX		 527{
528 return NULL;
529}
530
531static inline void br_multicast_add_port(struct net_bridge_port *port)
532{
533}
534
535static inline void br_multicast_del_port(struct net_bridge_port *port)
536{
537}
538
539static inline void br_multicast_enable_port(struct net_bridge_port *port)
540{
541}
542
543static inline void br_multicast_disable_port(struct net_bridge_port *port)
544{
545}
546
547static inline void br_multicast_init(struct net_bridge *br)
548{
549}
550
551static inline void br_multicast_open(struct net_bridge *br)
552{
553}
554
555static inline void br_multicast_stop(struct net_bridge *br)
556{
557}
5cb5e947
HX		 558
559static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
560 struct sk_buff *skb)
561{
562}
563
564static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
565 struct sk_buff *skb,
566 struct sk_buff *skb2)
567{
568}
eb1d1641
HX		 569static inline bool br_multicast_is_router(struct net_bridge *br)
570{
85b35269 571 return 0;
eb1d1641 572}
cc0fdd80
LL		 573static inline bool br_multicast_querier_exists(struct net_bridge *br,
574 struct ethhdr *eth)
b00589af
LL		 575{
576 return false;
577}
fdb184d1
RR		 578static inline void br_mdb_init(void)
579{
580}
581static inline void br_mdb_uninit(void)
582{
583}
85b35269 584#endif
eb1d1641 585
243a2e63
VY		 586/* br_vlan.c */
587#ifdef CONFIG_BRIDGE_VLAN_FILTERING
348662a1
JP		 588bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v,
589 struct sk_buff *skb, u16 *vid);
590bool br_allowed_egress(struct net_bridge *br, const struct net_port_vlans *v,
591 const struct sk_buff *skb);
e0d7968a 592bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
348662a1
JP		 593struct sk_buff *br_handle_vlan(struct net_bridge *br,
594 const struct net_port_vlans *v,
595 struct sk_buff *skb);
596int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags);
597int br_vlan_delete(struct net_bridge *br, u16 vid);
598void br_vlan_flush(struct net_bridge *br);
2b292fb4 599bool br_vlan_find(struct net_bridge *br, u16 vid);
348662a1
JP		 600int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
601int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags);
602int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
603void nbp_vlan_flush(struct net_bridge_port *port);
604bool nbp_vlan_find(struct net_bridge_port *port, u16 vid);
a37b85c9
VY		 605
606static inline struct net_port_vlans *br_get_vlan_info(
607 const struct net_bridge *br)
608{
1690be63 609 return rcu_dereference_rtnl(br->vlan_info);
a37b85c9
VY		 610}
611
612static inline struct net_port_vlans *nbp_get_vlan_info(
613 const struct net_bridge_port *p)
614{
1690be63 615 return rcu_dereference_rtnl(p->vlan_info);
a37b85c9
VY		 616}
617
618/* Since bridge now depends on 8021Q module, but the time bridge sees the
619 * skb, the vlan tag will always be present if the frame was tagged.
620 */
621static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
622{
623 int err = 0;
624
625 if (vlan_tx_tag_present(skb))
626 *vid = vlan_tx_tag_get(skb) & VLAN_VID_MASK;
627 else {
628 *vid = 0;
629 err = -EINVAL;
630 }
631
632 return err;
633}
78851988
VY		 634
635static inline u16 br_get_pvid(const struct net_port_vlans *v)
636{
637 /* Return just the VID if it is set, or VLAN_N_VID (invalid vid) if
638 * vid wasn't set
639 */
640 smp_rmb();
d1c6c708 641 return v->pvid ?: VLAN_N_VID;
78851988
VY		 642}
643
2796d0c6
VY		 644static inline int br_vlan_enabled(struct net_bridge *br)
645{
646 return br->vlan_enabled;
647}
243a2e63 648#else
a37b85c9
VY		 649static inline bool br_allowed_ingress(struct net_bridge *br,
650 struct net_port_vlans *v,
78851988
VY		 651 struct sk_buff *skb,
652 u16 *vid)
a37b85c9
VY		 653{
654 return true;
655}
656
85f46c6b
VY		 657static inline bool br_allowed_egress(struct net_bridge *br,
658 const struct net_port_vlans *v,
659 const struct sk_buff *skb)
660{
661 return true;
662}
663
e0d7968a
TM		 664static inline bool br_should_learn(struct net_bridge_port *p,
665 struct sk_buff *skb, u16 *vid)
666{
667 return true;
668}
669
78851988
VY		 670static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
671 const struct net_port_vlans *v,
672 struct sk_buff *skb)
673{
674 return skb;
675}
676
552406c4 677static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags)
243a2e63
VY		 678{
679 return -EOPNOTSUPP;
680}
681
682static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
683{
684 return -EOPNOTSUPP;
685}
686
687static inline void br_vlan_flush(struct net_bridge *br)
688{
689}
690
2b292fb4
TM		 691static inline bool br_vlan_find(struct net_bridge *br, u16 vid)
692{
693 return false;
694}
695
552406c4 696static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags)
243a2e63
VY		 697{
698 return -EOPNOTSUPP;
699}
700
701static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
702{
703 return -EOPNOTSUPP;
704}
705
706static inline void nbp_vlan_flush(struct net_bridge_port *port)
707{
708}
709
a37b85c9
VY		 710static inline struct net_port_vlans *br_get_vlan_info(
711 const struct net_bridge *br)
712{
713 return NULL;
714}
715static inline struct net_port_vlans *nbp_get_vlan_info(
716 const struct net_bridge_port *p)
717{
718 return NULL;
719}
720
bc9a25d2
VY		 721static inline bool nbp_vlan_find(struct net_bridge_port *port, u16 vid)
722{
723 return false;
724}
725
78851988 726static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
a37b85c9
VY		 727{
728 return 0;
729}
78851988
VY		 730static inline u16 br_get_pvid(const struct net_port_vlans *v)
731{
732 return VLAN_N_VID; /* Returns invalid vid */
733}
2796d0c6 734
d4f0e095 735static inline int br_vlan_enabled(struct net_bridge *br)
2796d0c6
VY		 736{
737 return 0;
738}
243a2e63
VY		 739#endif
740
1da177e4 741/* br_netfilter.c */
c0909713 742#ifdef CONFIG_BRIDGE_NETFILTER
348662a1
JP		 743int br_netfilter_init(void);
744void br_netfilter_fini(void);
745void br_netfilter_rtable_init(struct net_bridge *);
c0909713
SH		 746#else
747#define br_netfilter_init() (0)
31a5b837 748#define br_netfilter_fini() do { } while (0)
4adf0af6 749#define br_netfilter_rtable_init(x)
c0909713 750#endif
1da177e4
LT		 751
752/* br_stp.c */
348662a1
JP		 753void br_log_state(const struct net_bridge_port *p);
754struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
755void br_init_port(struct net_bridge_port *p);
756void br_become_designated_port(struct net_bridge_port *p);
1da177e4 757
348662a1
JP		 758void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
759int br_set_forward_delay(struct net_bridge *br, unsigned long x);
760int br_set_hello_time(struct net_bridge *br, unsigned long x);
761int br_set_max_age(struct net_bridge *br, unsigned long x);
14f98f25 762
763
1da177e4 764/* br_stp_if.c */
348662a1
JP		 765void br_stp_enable_bridge(struct net_bridge *br);
766void br_stp_disable_bridge(struct net_bridge *br);
767void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
768void br_stp_enable_port(struct net_bridge_port *p);
769void br_stp_disable_port(struct net_bridge_port *p);
770bool br_stp_recalculate_bridge_id(struct net_bridge *br);
771void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
772void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
773int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
774int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
775ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
1da177e4
LT		 776
777/* br_stp_bpdu.c */
7c85fbf0 778struct stp_proto;
348662a1
JP		 779void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
780 struct net_device *dev);
1da177e4
LT		 781
782/* br_stp_timer.c */
348662a1
JP		 783void br_stp_timer_init(struct net_bridge *br);
784void br_stp_port_timer_init(struct net_bridge_port *p);
785unsigned long br_timer_value(const struct timer_list *timer);
1da177e4
LT		 786
787/* br.c */
e6373c4c 788#if IS_ENABLED(CONFIG_ATM_LANE)
da678292
MM		 789extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
790#endif
1da177e4 791
11dc1f36 792/* br_netlink.c */
149ddd83 793extern struct rtnl_link_ops br_link_ops;
348662a1
JP		 794int br_netlink_init(void);
795void br_netlink_fini(void);
796void br_ifinfo_notify(int event, struct net_bridge_port *port);
797int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg);
798int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg);
799int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
800 u32 filter_mask);
11dc1f36 801
1da177e4
LT		 802#ifdef CONFIG_SYSFS
803/* br_sysfs_if.c */
52cf25d0 804extern const struct sysfs_ops brport_sysfs_ops;
348662a1
JP		 805int br_sysfs_addif(struct net_bridge_port *p);
806int br_sysfs_renameif(struct net_bridge_port *p);
1da177e4
LT		 807
808/* br_sysfs_br.c */
348662a1
JP		 809int br_sysfs_addbr(struct net_device *dev);
810void br_sysfs_delbr(struct net_device *dev);
1da177e4
LT		 811
812#else
813
0cb2bbbe
LJ		 814static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
815static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
816static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
817static inline void br_sysfs_delbr(struct net_device *dev) { return; }
1da177e4
LT		 818#endif /* CONFIG_SYSFS */
819
820#endif
Linux 6.x block layer and io_uring tree(s)