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#define BR_MULTICAST_QUERY_INTVL_MAX msecs_to_jiffies(86400000) /* 24 hours */
35#define BR_MULTICAST_STARTUP_QUERY_INTVL_MAX BR_MULTICAST_QUERY_INTVL_MAX
36
37#define BR_HWDOM_MAX BITS_PER_LONG
38
39#define BR_VERSION "2.3"
40
41/* Control of forwarding link local multicast */
42#define BR_GROUPFWD_DEFAULT 0
43/* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */
44enum {
45 BR_GROUPFWD_STP = BIT(0),
46 BR_GROUPFWD_MACPAUSE = BIT(1),
47 BR_GROUPFWD_LACP = BIT(2),
48};
49
50#define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \
51 BR_GROUPFWD_LACP)
52/* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
53#define BR_GROUPFWD_8021AD 0xB801u
54
55/* Path to usermode spanning tree program */
56#define BR_STP_PROG "/sbin/bridge-stp"
57
58#define BR_FDB_NOTIFY_SETTABLE_BITS (FDB_NOTIFY_BIT | FDB_NOTIFY_INACTIVE_BIT)
59
60typedef struct bridge_id bridge_id;
61typedef struct mac_addr mac_addr;
62typedef __u16 port_id;
63
64struct bridge_id {
65 unsigned char prio[2];
66 unsigned char addr[ETH_ALEN];
67};
68
69struct mac_addr {
70 unsigned char addr[ETH_ALEN];
71};
72
73#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
74/* our own querier */
75struct bridge_mcast_own_query {
76 struct timer_list timer;
77 u32 startup_sent;
78};
79
80/* other querier */
81struct bridge_mcast_other_query {
82 struct timer_list timer;
83 struct timer_list delay_timer;
84};
85
86/* selected querier */
87struct bridge_mcast_querier {
88 struct br_ip addr;
89 int port_ifidx;
90 seqcount_spinlock_t seq;
91};
92
93/* IGMP/MLD statistics */
94struct bridge_mcast_stats {
95 struct br_mcast_stats mstats;
96 struct u64_stats_sync syncp;
97};
98
99struct br_mdb_src_entry {
100 struct br_ip addr;
101};
102
103struct br_mdb_config {
104 struct net_bridge *br;
105 struct net_bridge_port *p;
106 struct br_mdb_entry *entry;
107 struct br_ip group;
108 bool src_entry;
109 u8 filter_mode;
110 u16 nlflags;
111 struct br_mdb_src_entry *src_entries;
112 int num_src_entries;
113 u8 rt_protocol;
114};
115#endif
116
117/* net_bridge_mcast_port must be always defined due to forwarding stubs */
118struct net_bridge_mcast_port {
119#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
120 struct net_bridge_port *port;
121 struct net_bridge_vlan *vlan;
122
123 struct bridge_mcast_own_query ip4_own_query;
124 struct timer_list ip4_mc_router_timer;
125 struct hlist_node ip4_rlist;
126#if IS_ENABLED(CONFIG_IPV6)
127 struct bridge_mcast_own_query ip6_own_query;
128 struct timer_list ip6_mc_router_timer;
129 struct hlist_node ip6_rlist;
130#endif /* IS_ENABLED(CONFIG_IPV6) */
131 unsigned char multicast_router;
132 u32 mdb_n_entries;
133 u32 mdb_max_entries;
134#endif /* CONFIG_BRIDGE_IGMP_SNOOPING */
135};
136
137/* net_bridge_mcast must be always defined due to forwarding stubs */
138struct net_bridge_mcast {
139#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
140 struct net_bridge *br;
141 struct net_bridge_vlan *vlan;
142
143 u32 multicast_last_member_count;
144 u32 multicast_startup_query_count;
145
146 u8 multicast_querier;
147 u8 multicast_igmp_version;
148 u8 multicast_router;
149#if IS_ENABLED(CONFIG_IPV6)
150 u8 multicast_mld_version;
151#endif
152 unsigned long multicast_last_member_interval;
153 unsigned long multicast_membership_interval;
154 unsigned long multicast_querier_interval;
155 unsigned long multicast_query_interval;
156 unsigned long multicast_query_response_interval;
157 unsigned long multicast_startup_query_interval;
158 struct hlist_head ip4_mc_router_list;
159 struct timer_list ip4_mc_router_timer;
160 struct bridge_mcast_other_query ip4_other_query;
161 struct bridge_mcast_own_query ip4_own_query;
162 struct bridge_mcast_querier ip4_querier;
163#if IS_ENABLED(CONFIG_IPV6)
164 struct hlist_head ip6_mc_router_list;
165 struct timer_list ip6_mc_router_timer;
166 struct bridge_mcast_other_query ip6_other_query;
167 struct bridge_mcast_own_query ip6_own_query;
168 struct bridge_mcast_querier ip6_querier;
169#endif /* IS_ENABLED(CONFIG_IPV6) */
170#endif /* CONFIG_BRIDGE_IGMP_SNOOPING */
171};
172
173struct br_tunnel_info {
174 __be64 tunnel_id;
175 struct metadata_dst __rcu *tunnel_dst;
176};
177
178/* private vlan flags */
179enum {
180 BR_VLFLAG_PER_PORT_STATS = BIT(0),
181 BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1),
182 BR_VLFLAG_MCAST_ENABLED = BIT(2),
183 BR_VLFLAG_GLOBAL_MCAST_ENABLED = BIT(3),
184 BR_VLFLAG_NEIGH_SUPPRESS_ENABLED = BIT(4),
185};
186
187/**
188 * struct net_bridge_vlan - per-vlan entry
189 *
190 * @vnode: rhashtable member
191 * @tnode: rhashtable member
192 * @vid: VLAN id
193 * @flags: bridge vlan flags
194 * @priv_flags: private (in-kernel) bridge vlan flags
195 * @state: STP state (e.g. blocking, learning, forwarding)
196 * @stats: per-cpu VLAN statistics
197 * @br: if MASTER flag set, this points to a bridge struct
198 * @port: if MASTER flag unset, this points to a port struct
199 * @refcnt: if MASTER flag set, this is bumped for each port referencing it
200 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
201 * for this VLAN entry
202 * @tinfo: bridge tunnel info
203 * @br_mcast_ctx: if MASTER flag set, this is the global vlan multicast context
204 * @port_mcast_ctx: if MASTER flag unset, this is the per-port/vlan multicast
205 * context
206 * @msti: if MASTER flag set, this holds the VLANs MST instance
207 * @vlist: sorted list of VLAN entries
208 * @rcu: used for entry destruction
209 *
210 * This structure is shared between the global per-VLAN entries contained in
211 * the bridge rhashtable and the local per-port per-VLAN entries contained in
212 * the port's rhashtable. The union entries should be interpreted depending on
213 * the entry flags that are set.
214 */
215struct net_bridge_vlan {
216 struct rhash_head vnode;
217 struct rhash_head tnode;
218 u16 vid;
219 u16 flags;
220 u16 priv_flags;
221 u8 state;
222 struct pcpu_sw_netstats __percpu *stats;
223 union {
224 struct net_bridge *br;
225 struct net_bridge_port *port;
226 };
227 union {
228 refcount_t refcnt;
229 struct net_bridge_vlan *brvlan;
230 };
231
232 struct br_tunnel_info tinfo;
233
234 union {
235 struct net_bridge_mcast br_mcast_ctx;
236 struct net_bridge_mcast_port port_mcast_ctx;
237 };
238
239 u16 msti;
240
241 struct list_head vlist;
242
243 struct rcu_head rcu;
244};
245
246/**
247 * struct net_bridge_vlan_group
248 *
249 * @vlan_hash: VLAN entry rhashtable
250 * @vlan_list: sorted VLAN entry list
251 * @num_vlans: number of total VLAN entries
252 * @pvid: PVID VLAN id
253 * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking)
254 *
255 * IMPORTANT: Be careful when checking if there're VLAN entries using list
256 * primitives because the bridge can have entries in its list which
257 * are just for global context but not for filtering, i.e. they have
258 * the master flag set but not the brentry flag. If you have to check
259 * if there're "real" entries in the bridge please test @num_vlans
260 */
261struct net_bridge_vlan_group {
262 struct rhashtable vlan_hash;
263 struct rhashtable tunnel_hash;
264 struct list_head vlan_list;
265 u16 num_vlans;
266 u16 pvid;
267 u8 pvid_state;
268};
269
270/* bridge fdb flags */
271enum {
272 BR_FDB_LOCAL,
273 BR_FDB_STATIC,
274 BR_FDB_STICKY,
275 BR_FDB_ADDED_BY_USER,
276 BR_FDB_ADDED_BY_EXT_LEARN,
277 BR_FDB_OFFLOADED,
278 BR_FDB_NOTIFY,
279 BR_FDB_NOTIFY_INACTIVE,
280 BR_FDB_LOCKED,
281 BR_FDB_DYNAMIC_LEARNED,
282};
283
284struct net_bridge_fdb_key {
285 mac_addr addr;
286 u16 vlan_id;
287};
288
289struct net_bridge_fdb_entry {
290 struct rhash_head rhnode;
291 struct net_bridge_port *dst;
292
293 struct net_bridge_fdb_key key;
294 struct hlist_node fdb_node;
295 unsigned long flags;
296
297 /* write-heavy members should not affect lookups */
298 unsigned long updated ____cacheline_aligned_in_smp;
299 unsigned long used;
300
301 struct rcu_head rcu;
302};
303
304struct net_bridge_fdb_flush_desc {
305 unsigned long flags;
306 unsigned long flags_mask;
307 int port_ifindex;
308 u16 vlan_id;
309};
310
311#define MDB_PG_FLAGS_PERMANENT BIT(0)
312#define MDB_PG_FLAGS_OFFLOAD BIT(1)
313#define MDB_PG_FLAGS_FAST_LEAVE BIT(2)
314#define MDB_PG_FLAGS_STAR_EXCL BIT(3)
315#define MDB_PG_FLAGS_BLOCKED BIT(4)
316#define MDB_PG_FLAGS_OFFLOAD_FAILED BIT(5)
317
318#define PG_SRC_ENT_LIMIT 32
319
320#define BR_SGRP_F_DELETE BIT(0)
321#define BR_SGRP_F_SEND BIT(1)
322#define BR_SGRP_F_INSTALLED BIT(2)
323#define BR_SGRP_F_USER_ADDED BIT(3)
324
325struct net_bridge_mcast_gc {
326 struct hlist_node gc_node;
327 void (*destroy)(struct net_bridge_mcast_gc *gc);
328};
329
330struct net_bridge_group_src {
331 struct hlist_node node;
332
333 struct br_ip addr;
334 struct net_bridge_port_group *pg;
335 u8 flags;
336 u8 src_query_rexmit_cnt;
337 struct timer_list timer;
338
339 struct net_bridge *br;
340 struct net_bridge_mcast_gc mcast_gc;
341 struct rcu_head rcu;
342};
343
344struct net_bridge_port_group_sg_key {
345 struct net_bridge_port *port;
346 struct br_ip addr;
347};
348
349struct net_bridge_port_group {
350 struct net_bridge_port_group __rcu *next;
351 struct net_bridge_port_group_sg_key key;
352 unsigned char eth_addr[ETH_ALEN] __aligned(2);
353 unsigned char flags;
354 unsigned char filter_mode;
355 unsigned char grp_query_rexmit_cnt;
356 unsigned char rt_protocol;
357
358 struct hlist_head src_list;
359 unsigned int src_ents;
360 struct timer_list timer;
361 struct timer_list rexmit_timer;
362 struct hlist_node mglist;
363 struct rb_root eht_set_tree;
364 struct rb_root eht_host_tree;
365
366 struct rhash_head rhnode;
367 struct net_bridge_mcast_gc mcast_gc;
368 struct rcu_head rcu;
369};
370
371struct net_bridge_mdb_entry {
372 struct rhash_head rhnode;
373 struct net_bridge *br;
374 struct net_bridge_port_group __rcu *ports;
375 struct br_ip addr;
376 bool host_joined;
377
378 struct timer_list timer;
379 struct hlist_node mdb_node;
380
381 struct net_bridge_mcast_gc mcast_gc;
382 struct rcu_head rcu;
383};
384
385struct net_bridge_port {
386 struct net_bridge *br;
387 struct net_device *dev;
388 netdevice_tracker dev_tracker;
389 struct list_head list;
390
391 unsigned long flags;
392#ifdef CONFIG_BRIDGE_VLAN_FILTERING
393 struct net_bridge_vlan_group __rcu *vlgrp;
394#endif
395 struct net_bridge_port __rcu *backup_port;
396 u32 backup_nhid;
397
398 /* STP */
399 u8 priority;
400 u8 state;
401 u16 port_no;
402 unsigned char topology_change_ack;
403 unsigned char config_pending;
404 port_id port_id;
405 port_id designated_port;
406 bridge_id designated_root;
407 bridge_id designated_bridge;
408 u32 path_cost;
409 u32 designated_cost;
410 unsigned long designated_age;
411
412 struct timer_list forward_delay_timer;
413 struct timer_list hold_timer;
414 struct timer_list message_age_timer;
415 struct kobject kobj;
416 struct rcu_head rcu;
417
418 struct net_bridge_mcast_port multicast_ctx;
419
420#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
421 struct bridge_mcast_stats __percpu *mcast_stats;
422
423 u32 multicast_eht_hosts_limit;
424 u32 multicast_eht_hosts_cnt;
425 struct hlist_head mglist;
426#endif
427
428#ifdef CONFIG_SYSFS
429 char sysfs_name[IFNAMSIZ];
430#endif
431
432#ifdef CONFIG_NET_POLL_CONTROLLER
433 struct netpoll *np;
434#endif
435#ifdef CONFIG_NET_SWITCHDEV
436 /* Identifier used to group ports that share the same switchdev
437 * hardware domain.
438 */
439 int hwdom;
440 int offload_count;
441 struct netdev_phys_item_id ppid;
442#endif
443 u16 group_fwd_mask;
444 u16 backup_redirected_cnt;
445
446 struct bridge_stp_xstats stp_xstats;
447};
448
449#define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj)
450
451#define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
452#define br_promisc_port(p) ((p)->flags & BR_PROMISC)
453
454static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
455{
456 return rcu_dereference(dev->rx_handler_data);
457}
458
459static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
460{
461 return netif_is_bridge_port(dev) ?
462 rtnl_dereference(dev->rx_handler_data) : NULL;
463}
464
465static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev)
466{
467 return netif_is_bridge_port(dev) ?
468 rcu_dereference_rtnl(dev->rx_handler_data) : NULL;
469}
470
471enum net_bridge_opts {
472 BROPT_VLAN_ENABLED,
473 BROPT_VLAN_STATS_ENABLED,
474 BROPT_NF_CALL_IPTABLES,
475 BROPT_NF_CALL_IP6TABLES,
476 BROPT_NF_CALL_ARPTABLES,
477 BROPT_GROUP_ADDR_SET,
478 BROPT_MULTICAST_ENABLED,
479 BROPT_MULTICAST_QUERY_USE_IFADDR,
480 BROPT_MULTICAST_STATS_ENABLED,
481 BROPT_HAS_IPV6_ADDR,
482 BROPT_NEIGH_SUPPRESS_ENABLED,
483 BROPT_MTU_SET_BY_USER,
484 BROPT_VLAN_STATS_PER_PORT,
485 BROPT_NO_LL_LEARN,
486 BROPT_VLAN_BRIDGE_BINDING,
487 BROPT_MCAST_VLAN_SNOOPING_ENABLED,
488 BROPT_MST_ENABLED,
489 BROPT_MDB_OFFLOAD_FAIL_NOTIFICATION,
490 BROPT_FDB_LOCAL_VLAN_0,
491};
492
493struct net_bridge {
494 spinlock_t lock;
495 spinlock_t hash_lock;
496 struct hlist_head frame_type_list;
497 struct net_device *dev;
498 unsigned long options;
499 /* These fields are accessed on each packet */
500#ifdef CONFIG_BRIDGE_VLAN_FILTERING
501 __be16 vlan_proto;
502 u16 default_pvid;
503 struct net_bridge_vlan_group __rcu *vlgrp;
504#endif
505
506 struct rhashtable fdb_hash_tbl;
507 struct list_head port_list;
508#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
509 union {
510 struct rtable fake_rtable;
511 struct rt6_info fake_rt6_info;
512 };
513 u32 metrics[RTAX_MAX];
514#endif
515 u16 group_fwd_mask;
516 u16 group_fwd_mask_required;
517
518 /* STP */
519 bridge_id designated_root;
520 bridge_id bridge_id;
521 unsigned char topology_change;
522 unsigned char topology_change_detected;
523 u16 root_port;
524 unsigned long max_age;
525 unsigned long hello_time;
526 unsigned long forward_delay;
527 unsigned long ageing_time;
528 unsigned long bridge_max_age;
529 unsigned long bridge_hello_time;
530 unsigned long bridge_forward_delay;
531 unsigned long bridge_ageing_time;
532 u32 root_path_cost;
533
534 u8 group_addr[ETH_ALEN];
535
536 enum {
537 BR_NO_STP, /* no spanning tree */
538 BR_KERNEL_STP, /* old STP in kernel */
539 BR_USER_STP, /* new RSTP in userspace */
540 } stp_enabled;
541
542 struct net_bridge_mcast multicast_ctx;
543
544#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
545 struct bridge_mcast_stats __percpu *mcast_stats;
546
547 u32 hash_max;
548
549 spinlock_t multicast_lock;
550
551 struct rhashtable mdb_hash_tbl;
552 struct rhashtable sg_port_tbl;
553
554 struct hlist_head mcast_gc_list;
555 struct hlist_head mdb_list;
556
557 struct work_struct mcast_gc_work;
558#endif
559
560 struct timer_list hello_timer;
561 struct timer_list tcn_timer;
562 struct timer_list topology_change_timer;
563 struct delayed_work gc_work;
564 struct kobject *ifobj;
565 u32 auto_cnt;
566
567 atomic_t fdb_n_learned;
568 u32 fdb_max_learned;
569
570#ifdef CONFIG_NET_SWITCHDEV
571 /* Counter used to make sure that hardware domains get unique
572 * identifiers in case a bridge spans multiple switchdev instances.
573 */
574 int last_hwdom;
575 /* Bit mask of hardware domain numbers in use */
576 unsigned long busy_hwdoms;
577#endif
578 struct hlist_head fdb_list;
579
580#if IS_ENABLED(CONFIG_BRIDGE_MRP)
581 struct hlist_head mrp_list;
582#endif
583#if IS_ENABLED(CONFIG_BRIDGE_CFM)
584 struct hlist_head mep_list;
585#endif
586};
587
588struct br_input_skb_cb {
589 struct net_device *brdev;
590
591 u16 frag_max_size;
592#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
593 u8 igmp;
594 u8 mrouters_only:1;
595#endif
596 u8 proxyarp_replied:1;
597 u8 src_port_isolated:1;
598 u8 promisc:1;
599#ifdef CONFIG_BRIDGE_VLAN_FILTERING
600 u8 vlan_filtered:1;
601#endif
602#ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
603 u8 br_netfilter_broute:1;
604#endif
605
606#ifdef CONFIG_NET_SWITCHDEV
607 /* Set if TX data plane offloading is used towards at least one
608 * hardware domain.
609 */
610 u8 tx_fwd_offload:1;
611 /* The switchdev hardware domain from which this packet was received.
612 * If skb->offload_fwd_mark was set, then this packet was already
613 * forwarded by hardware to the other ports in the source hardware
614 * domain, otherwise it wasn't.
615 */
616 int src_hwdom;
617 /* Bit mask of hardware domains towards this packet has already been
618 * transmitted using the TX data plane offload.
619 */
620 unsigned long fwd_hwdoms;
621#endif
622
623 u32 backup_nhid;
624};
625
626#define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
627
628#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
629# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
630#else
631# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
632#endif
633
634#define br_printk(level, br, format, args...) \
635 printk(level "%s: " format, (br)->dev->name, ##args)
636
637#define br_err(__br, format, args...) \
638 br_printk(KERN_ERR, __br, format, ##args)
639#define br_warn(__br, format, args...) \
640 br_printk(KERN_WARNING, __br, format, ##args)
641#define br_notice(__br, format, args...) \
642 br_printk(KERN_NOTICE, __br, format, ##args)
643#define br_info(__br, format, args...) \
644 br_printk(KERN_INFO, __br, format, ##args)
645
646#define br_debug(br, format, args...) \
647 pr_debug("%s: " format, (br)->dev->name, ##args)
648
649/* called under bridge lock */
650static inline int br_is_root_bridge(const struct net_bridge *br)
651{
652 return !memcmp(&br->bridge_id, &br->designated_root, 8);
653}
654
655/* check if a VLAN entry is global */
656static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
657{
658 return v->flags & BRIDGE_VLAN_INFO_MASTER;
659}
660
661/* check if a VLAN entry is used by the bridge */
662static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
663{
664 return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
665}
666
667/* check if we should use the vlan entry, returns false if it's only context */
668static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
669{
670 if (br_vlan_is_master(v)) {
671 if (br_vlan_is_brentry(v))
672 return true;
673 else
674 return false;
675 }
676
677 return true;
678}
679
680static inline bool nbp_state_should_learn(const struct net_bridge_port *p)
681{
682 return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING;
683}
684
685static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack)
686{
687 bool ret = vid > 0 && vid < VLAN_VID_MASK;
688
689 if (!ret)
690 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid");
691
692 return ret;
693}
694
695static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur,
696 const struct bridge_vlan_info *last,
697 struct netlink_ext_ack *extack)
698{
699 /* pvid flag is not allowed in ranges */
700 if (cur->flags & BRIDGE_VLAN_INFO_PVID) {
701 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range");
702 return false;
703 }
704
705 /* when cur is the range end, check if:
706 * - it has range start flag
707 * - range ids are invalid (end is equal to or before start)
708 */
709 if (last) {
710 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
711 NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one");
712 return false;
713 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) {
714 NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing");
715 return false;
716 } else if (cur->vid <= last->vid) {
717 NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id");
718 return false;
719 }
720 }
721
722 /* check for required range flags */
723 if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN |
724 BRIDGE_VLAN_INFO_RANGE_END))) {
725 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing");
726 return false;
727 }
728
729 return true;
730}
731
732static inline u8 br_vlan_multicast_router(const struct net_bridge_vlan *v)
733{
734 u8 mcast_router = MDB_RTR_TYPE_DISABLED;
735
736#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
737 if (!br_vlan_is_master(v))
738 mcast_router = v->port_mcast_ctx.multicast_router;
739 else
740 mcast_router = v->br_mcast_ctx.multicast_router;
741#endif
742
743 return mcast_router;
744}
745
746static inline int br_afspec_cmd_to_rtm(int cmd)
747{
748 switch (cmd) {
749 case RTM_SETLINK:
750 return RTM_NEWVLAN;
751 case RTM_DELLINK:
752 return RTM_DELVLAN;
753 }
754
755 return 0;
756}
757
758static inline int br_opt_get(const struct net_bridge *br,
759 enum net_bridge_opts opt)
760{
761 return test_bit(opt, &br->options);
762}
763
764int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
765 struct netlink_ext_ack *extack);
766int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt);
767int br_boolopt_multi_toggle(struct net_bridge *br,
768 struct br_boolopt_multi *bm,
769 struct netlink_ext_ack *extack);
770void br_boolopt_multi_get(const struct net_bridge *br,
771 struct br_boolopt_multi *bm);
772void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on);
773
774#if IS_ENABLED(CONFIG_NET_TC_SKB_EXT)
775static inline void br_tc_skb_miss_set(struct sk_buff *skb, bool miss)
776{
777 struct tc_skb_ext *ext;
778
779 if (!tc_skb_ext_tc_enabled())
780 return;
781
782 ext = skb_ext_find(skb, TC_SKB_EXT);
783 if (ext) {
784 ext->l2_miss = miss;
785 return;
786 }
787 if (!miss)
788 return;
789 ext = tc_skb_ext_alloc(skb);
790 if (!ext)
791 return;
792 ext->l2_miss = true;
793}
794#else
795static inline void br_tc_skb_miss_set(struct sk_buff *skb, bool miss)
796{
797}
798#endif
799
800/* br_device.c */
801void br_dev_setup(struct net_device *dev);
802void br_dev_delete(struct net_device *dev, struct list_head *list);
803netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
804#ifdef CONFIG_NET_POLL_CONTROLLER
805static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
806 struct sk_buff *skb)
807{
808 netpoll_send_skb(np: p->np, skb);
809}
810
811int br_netpoll_enable(struct net_bridge_port *p);
812void br_netpoll_disable(struct net_bridge_port *p);
813#else
814static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
815 struct sk_buff *skb)
816{
817}
818
819static inline int br_netpoll_enable(struct net_bridge_port *p)
820{
821 return 0;
822}
823
824static inline void br_netpoll_disable(struct net_bridge_port *p)
825{
826}
827#endif
828
829/* br_fdb.c */
830#define FDB_FLUSH_IGNORED_NDM_FLAGS (NTF_MASTER | NTF_SELF)
831#define FDB_FLUSH_ALLOWED_NDM_STATES (NUD_PERMANENT | NUD_NOARP)
832#define FDB_FLUSH_ALLOWED_NDM_FLAGS (NTF_USE | NTF_EXT_LEARNED | \
833 NTF_STICKY | NTF_OFFLOADED)
834
835int br_fdb_init(void);
836void br_fdb_fini(void);
837int br_fdb_hash_init(struct net_bridge *br);
838void br_fdb_hash_fini(struct net_bridge *br);
839void br_fdb_flush(struct net_bridge *br,
840 const struct net_bridge_fdb_flush_desc *desc);
841void br_fdb_find_delete_local(struct net_bridge *br,
842 const struct net_bridge_port *p,
843 const unsigned char *addr, u16 vid);
844void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
845void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
846void br_fdb_cleanup(struct work_struct *work);
847int br_fdb_toggle_local_vlan_0(struct net_bridge *br, bool on,
848 struct netlink_ext_ack *extack);
849void br_fdb_delete_by_port(struct net_bridge *br,
850 const struct net_bridge_port *p, u16 vid, int do_all);
851struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br,
852 const unsigned char *addr,
853 __u16 vid);
854int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
855int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
856 unsigned long off);
857int br_fdb_add_local(struct net_bridge *br, struct net_bridge_port *source,
858 const unsigned char *addr, u16 vid);
859void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
860 const unsigned char *addr, u16 vid, unsigned long flags);
861
862int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
863 struct net_device *dev, const unsigned char *addr, u16 vid,
864 bool *notified, struct netlink_ext_ack *extack);
865int br_fdb_delete_bulk(struct nlmsghdr *nlh, struct net_device *dev,
866 struct netlink_ext_ack *extack);
867int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
868 const unsigned char *addr, u16 vid, u16 nlh_flags,
869 bool *notified, struct netlink_ext_ack *extack);
870int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
871 struct net_device *dev, struct net_device *fdev, int *idx);
872int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev,
873 const unsigned char *addr, u16 vid, u32 portid, u32 seq,
874 struct netlink_ext_ack *extack);
875int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
876void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
877int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
878 const unsigned char *addr, u16 vid,
879 bool locked, bool swdev_notify);
880int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
881 const unsigned char *addr, u16 vid,
882 bool swdev_notify);
883void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p,
884 const unsigned char *addr, u16 vid, bool offloaded);
885
886/* br_forward.c */
887enum br_pkt_type {
888 BR_PKT_UNICAST,
889 BR_PKT_MULTICAST,
890 BR_PKT_BROADCAST
891};
892int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
893void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
894 bool local_rcv, bool local_orig);
895int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
896void br_flood(struct net_bridge *br, struct sk_buff *skb,
897 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig,
898 u16 vid);
899
900/* return true if both source port and dest port are isolated */
901static inline bool br_skb_isolated(const struct net_bridge_port *to,
902 const struct sk_buff *skb)
903{
904 return BR_INPUT_SKB_CB(skb)->src_port_isolated &&
905 (to->flags & BR_ISOLATED);
906}
907
908/* br_if.c */
909void br_port_carrier_check(struct net_bridge_port *p, bool *notified);
910int br_add_bridge(struct net *net, const char *name);
911int br_del_bridge(struct net *net, const char *name);
912int br_add_if(struct net_bridge *br, struct net_device *dev,
913 struct netlink_ext_ack *extack);
914int br_del_if(struct net_bridge *br, struct net_device *dev);
915void br_mtu_auto_adjust(struct net_bridge *br);
916netdev_features_t br_features_recompute(struct net_bridge *br,
917 netdev_features_t features);
918void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
919void br_manage_promisc(struct net_bridge *br);
920int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev);
921
922/* br_input.c */
923int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
924rx_handler_func_t *br_get_rx_handler(const struct net_device *dev);
925
926struct br_frame_type {
927 __be16 type;
928 int (*frame_handler)(struct net_bridge_port *port,
929 struct sk_buff *skb);
930 struct hlist_node list;
931};
932
933void br_add_frame(struct net_bridge *br, struct br_frame_type *ft);
934void br_del_frame(struct net_bridge *br, struct br_frame_type *ft);
935
936static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
937{
938 return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev);
939}
940
941static inline bool br_rx_handler_check_rtnl(const struct net_device *dev)
942{
943 return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev);
944}
945
946static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
947{
948 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
949}
950
951static inline struct net_bridge_port *
952br_port_get_check_rtnl(const struct net_device *dev)
953{
954 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL;
955}
956
957/* br_ioctl.c */
958int br_dev_siocdevprivate(struct net_device *dev, struct ifreq *rq,
959 void __user *data, int cmd);
960int br_ioctl_stub(struct net *net, unsigned int cmd, void __user *uarg);
961
962/* br_multicast.c */
963#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
964int br_multicast_rcv(struct net_bridge_mcast **brmctx,
965 struct net_bridge_mcast_port **pmctx,
966 struct net_bridge_vlan *vlan,
967 struct sk_buff *skb, u16 vid);
968struct net_bridge_mdb_entry *
969br_mdb_entry_skb_get(struct net_bridge_mcast *brmctx, struct sk_buff *skb,
970 u16 vid);
971int br_multicast_add_port(struct net_bridge_port *port);
972void br_multicast_del_port(struct net_bridge_port *port);
973void br_multicast_enable_port(struct net_bridge_port *port);
974void br_multicast_disable_port(struct net_bridge_port *port);
975void br_multicast_init(struct net_bridge *br);
976void br_multicast_join_snoopers(struct net_bridge *br);
977void br_multicast_leave_snoopers(struct net_bridge *br);
978void br_multicast_open(struct net_bridge *br);
979void br_multicast_stop(struct net_bridge *br);
980void br_multicast_dev_del(struct net_bridge *br);
981void br_multicast_flood(struct net_bridge_mdb_entry *mdst, struct sk_buff *skb,
982 struct net_bridge_mcast *brmctx,
983 bool local_rcv, bool local_orig);
984int br_multicast_set_router(struct net_bridge_mcast *brmctx, unsigned long val);
985int br_multicast_set_port_router(struct net_bridge_mcast_port *pmctx,
986 unsigned long val);
987int br_multicast_set_vlan_router(struct net_bridge_vlan *v, u8 mcast_router);
988int br_multicast_toggle(struct net_bridge *br, unsigned long val,
989 struct netlink_ext_ack *extack);
990int br_multicast_set_querier(struct net_bridge_mcast *brmctx, unsigned long val);
991int br_multicast_set_igmp_version(struct net_bridge_mcast *brmctx,
992 unsigned long val);
993#if IS_ENABLED(CONFIG_IPV6)
994int br_multicast_set_mld_version(struct net_bridge_mcast *brmctx,
995 unsigned long val);
996#endif
997struct net_bridge_mdb_entry *
998br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst);
999struct net_bridge_mdb_entry *
1000br_multicast_new_group(struct net_bridge *br, struct br_ip *group);
1001struct net_bridge_port_group *
1002br_multicast_new_port_group(struct net_bridge_port *port,
1003 const struct br_ip *group,
1004 struct net_bridge_port_group __rcu *next,
1005 unsigned char flags, const unsigned char *src,
1006 u8 filter_mode, u8 rt_protocol,
1007 struct netlink_ext_ack *extack);
1008void br_multicast_del_port_group(struct net_bridge_port_group *p);
1009int br_mdb_hash_init(struct net_bridge *br);
1010void br_mdb_hash_fini(struct net_bridge *br);
1011void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp,
1012 struct net_bridge_port_group *pg, int type);
1013void br_mdb_flag_change_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp,
1014 struct net_bridge_port_group *pg);
1015void br_rtr_notify(struct net_device *dev, struct net_bridge_mcast_port *pmctx,
1016 int type);
1017void br_multicast_del_pg(struct net_bridge_mdb_entry *mp,
1018 struct net_bridge_port_group *pg,
1019 struct net_bridge_port_group __rcu **pp);
1020void br_multicast_count(struct net_bridge *br,
1021 const struct net_bridge_port *p,
1022 const struct sk_buff *skb, u8 type, u8 dir);
1023int br_multicast_init_stats(struct net_bridge *br);
1024void br_multicast_uninit_stats(struct net_bridge *br);
1025void br_multicast_get_stats(const struct net_bridge *br,
1026 const struct net_bridge_port *p,
1027 struct br_mcast_stats *dest);
1028u32 br_multicast_ngroups_get(const struct net_bridge_mcast_port *pmctx);
1029void br_multicast_ngroups_set_max(struct net_bridge_mcast_port *pmctx, u32 max);
1030u32 br_multicast_ngroups_get_max(const struct net_bridge_mcast_port *pmctx);
1031int br_mdb_add(struct net_device *dev, struct nlattr *tb[], u16 nlmsg_flags,
1032 struct netlink_ext_ack *extack);
1033int br_mdb_del(struct net_device *dev, struct nlattr *tb[],
1034 struct netlink_ext_ack *extack);
1035int br_mdb_del_bulk(struct net_device *dev, struct nlattr *tb[],
1036 struct netlink_ext_ack *extack);
1037int br_mdb_dump(struct net_device *dev, struct sk_buff *skb,
1038 struct netlink_callback *cb);
1039int br_mdb_get(struct net_device *dev, struct nlattr *tb[], u32 portid, u32 seq,
1040 struct netlink_ext_ack *extack);
1041void br_multicast_host_join(const struct net_bridge_mcast *brmctx,
1042 struct net_bridge_mdb_entry *mp, bool notify);
1043void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify);
1044void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg,
1045 u8 filter_mode);
1046void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp,
1047 struct net_bridge_port_group *sg);
1048struct net_bridge_group_src *
1049br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip);
1050struct net_bridge_group_src *
1051br_multicast_new_group_src(struct net_bridge_port_group *pg,
1052 struct br_ip *src_ip);
1053void __br_multicast_del_group_src(struct net_bridge_group_src *src);
1054void br_multicast_del_group_src(struct net_bridge_group_src *src,
1055 bool fastleave);
1056void br_multicast_ctx_init(struct net_bridge *br,
1057 struct net_bridge_vlan *vlan,
1058 struct net_bridge_mcast *brmctx);
1059void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx);
1060void br_multicast_port_ctx_init(struct net_bridge_port *port,
1061 struct net_bridge_vlan *vlan,
1062 struct net_bridge_mcast_port *pmctx);
1063void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx);
1064void br_multicast_update_vlan_mcast_ctx(struct net_bridge_vlan *v, u8 state);
1065void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on);
1066int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on,
1067 struct netlink_ext_ack *extack);
1068bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on);
1069
1070int br_rports_fill_info(struct sk_buff *skb,
1071 const struct net_bridge_mcast *brmctx);
1072int br_multicast_dump_querier_state(struct sk_buff *skb,
1073 const struct net_bridge_mcast *brmctx,
1074 int nest_attr);
1075size_t br_multicast_querier_state_size(void);
1076size_t br_rports_size(const struct net_bridge_mcast *brmctx);
1077void br_multicast_set_query_intvl(struct net_bridge_mcast *brmctx,
1078 unsigned long val);
1079void br_multicast_set_startup_query_intvl(struct net_bridge_mcast *brmctx,
1080 unsigned long val);
1081
1082static inline bool br_group_is_l2(const struct br_ip *group)
1083{
1084 return group->proto == 0;
1085}
1086
1087#define mlock_dereference(X, br) \
1088 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
1089
1090static inline struct hlist_node *
1091br_multicast_get_first_rport_node(struct net_bridge_mcast *brmctx,
1092 struct sk_buff *skb)
1093{
1094#if IS_ENABLED(CONFIG_IPV6)
1095 if (skb->protocol == htons(ETH_P_IPV6))
1096 return rcu_dereference(hlist_first_rcu(&brmctx->ip6_mc_router_list));
1097#endif
1098 return rcu_dereference(hlist_first_rcu(&brmctx->ip4_mc_router_list));
1099}
1100
1101static inline struct net_bridge_port *
1102br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb)
1103{
1104 struct net_bridge_mcast_port *mctx;
1105
1106#if IS_ENABLED(CONFIG_IPV6)
1107 if (skb->protocol == htons(ETH_P_IPV6))
1108 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port,
1109 ip6_rlist);
1110 else
1111#endif
1112 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port,
1113 ip4_rlist);
1114
1115 if (mctx)
1116 return mctx->port;
1117 else
1118 return NULL;
1119}
1120
1121static inline bool br_ip4_multicast_is_router(struct net_bridge_mcast *brmctx)
1122{
1123 return timer_pending(&brmctx->ip4_mc_router_timer);
1124}
1125
1126static inline bool br_ip6_multicast_is_router(struct net_bridge_mcast *brmctx)
1127{
1128#if IS_ENABLED(CONFIG_IPV6)
1129 return timer_pending(&brmctx->ip6_mc_router_timer);
1130#else
1131 return false;
1132#endif
1133}
1134
1135static inline bool
1136br_multicast_is_router(struct net_bridge_mcast *brmctx, struct sk_buff *skb)
1137{
1138 switch (brmctx->multicast_router) {
1139 case MDB_RTR_TYPE_PERM:
1140 return true;
1141 case MDB_RTR_TYPE_TEMP_QUERY:
1142 if (skb) {
1143 if (skb->protocol == htons(ETH_P_IP))
1144 return br_ip4_multicast_is_router(brmctx);
1145 else if (skb->protocol == htons(ETH_P_IPV6))
1146 return br_ip6_multicast_is_router(brmctx);
1147 } else {
1148 return br_ip4_multicast_is_router(brmctx) ||
1149 br_ip6_multicast_is_router(brmctx);
1150 }
1151 fallthrough;
1152 default:
1153 return false;
1154 }
1155}
1156
1157static inline bool
1158__br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1159 struct bridge_mcast_other_query *querier,
1160 const bool is_ipv6)
1161{
1162 bool own_querier_enabled;
1163
1164 if (brmctx->multicast_querier) {
1165 if (is_ipv6 && !br_opt_get(brmctx->br, BROPT_HAS_IPV6_ADDR))
1166 own_querier_enabled = false;
1167 else
1168 own_querier_enabled = true;
1169 } else {
1170 own_querier_enabled = false;
1171 }
1172
1173 return !timer_pending(&querier->delay_timer) &&
1174 (own_querier_enabled || timer_pending(&querier->timer));
1175}
1176
1177static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1178 struct ethhdr *eth,
1179 const struct net_bridge_mdb_entry *mdb)
1180{
1181 switch (eth->h_proto) {
1182 case (htons(ETH_P_IP)):
1183 return __br_multicast_querier_exists(brmctx,
1184 &brmctx->ip4_other_query, false);
1185#if IS_ENABLED(CONFIG_IPV6)
1186 case (htons(ETH_P_IPV6)):
1187 return __br_multicast_querier_exists(brmctx,
1188 &brmctx->ip6_other_query, true);
1189#endif
1190 default:
1191 return !!mdb && br_group_is_l2(&mdb->addr);
1192 }
1193}
1194
1195static inline bool br_multicast_is_star_g(const struct br_ip *ip)
1196{
1197 switch (ip->proto) {
1198 case htons(ETH_P_IP):
1199 return ipv4_is_zeronet(ip->src.ip4);
1200#if IS_ENABLED(CONFIG_IPV6)
1201 case htons(ETH_P_IPV6):
1202 return ipv6_addr_any(&ip->src.ip6);
1203#endif
1204 default:
1205 return false;
1206 }
1207}
1208
1209static inline bool
1210br_multicast_should_handle_mode(const struct net_bridge_mcast *brmctx,
1211 __be16 proto)
1212{
1213 switch (proto) {
1214 case htons(ETH_P_IP):
1215 return !!(brmctx->multicast_igmp_version == 3);
1216#if IS_ENABLED(CONFIG_IPV6)
1217 case htons(ETH_P_IPV6):
1218 return !!(brmctx->multicast_mld_version == 2);
1219#endif
1220 default:
1221 return false;
1222 }
1223}
1224
1225static inline int br_multicast_igmp_type(const struct sk_buff *skb)
1226{
1227 return BR_INPUT_SKB_CB(skb)->igmp;
1228}
1229
1230static inline unsigned long br_multicast_lmqt(const struct net_bridge_mcast *brmctx)
1231{
1232 return brmctx->multicast_last_member_interval *
1233 brmctx->multicast_last_member_count;
1234}
1235
1236static inline unsigned long br_multicast_gmi(const struct net_bridge_mcast *brmctx)
1237{
1238 return brmctx->multicast_membership_interval;
1239}
1240
1241static inline bool
1242br_multicast_ctx_is_vlan(const struct net_bridge_mcast *brmctx)
1243{
1244 return !!brmctx->vlan;
1245}
1246
1247static inline bool
1248br_multicast_port_ctx_is_vlan(const struct net_bridge_mcast_port *pmctx)
1249{
1250 return !!pmctx->vlan;
1251}
1252
1253static inline struct net_bridge_mcast *
1254br_multicast_port_ctx_get_global(const struct net_bridge_mcast_port *pmctx)
1255{
1256 if (!br_multicast_port_ctx_is_vlan(pmctx))
1257 return &pmctx->port->br->multicast_ctx;
1258 else
1259 return &pmctx->vlan->brvlan->br_mcast_ctx;
1260}
1261
1262static inline bool
1263br_multicast_ctx_vlan_global_disabled(const struct net_bridge_mcast *brmctx)
1264{
1265 return br_multicast_ctx_is_vlan(brmctx) &&
1266 (!br_opt_get(brmctx->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) ||
1267 !(brmctx->vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED));
1268}
1269
1270static inline bool
1271br_multicast_ctx_vlan_disabled(const struct net_bridge_mcast *brmctx)
1272{
1273 return br_multicast_ctx_is_vlan(brmctx) &&
1274 !(brmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED);
1275}
1276
1277static inline bool
1278br_multicast_port_ctx_vlan_disabled(const struct net_bridge_mcast_port *pmctx)
1279{
1280 return br_multicast_port_ctx_is_vlan(pmctx) &&
1281 !(pmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED);
1282}
1283
1284static inline bool
1285br_multicast_port_ctx_state_disabled(const struct net_bridge_mcast_port *pmctx)
1286{
1287 return pmctx->port->state == BR_STATE_DISABLED ||
1288 (br_multicast_port_ctx_is_vlan(pmctx) &&
1289 (br_multicast_port_ctx_vlan_disabled(pmctx) ||
1290 pmctx->vlan->state == BR_STATE_DISABLED));
1291}
1292
1293static inline bool
1294br_multicast_port_ctx_state_stopped(const struct net_bridge_mcast_port *pmctx)
1295{
1296 return br_multicast_port_ctx_state_disabled(pmctx) ||
1297 pmctx->port->state == BR_STATE_BLOCKING ||
1298 (br_multicast_port_ctx_is_vlan(pmctx) &&
1299 pmctx->vlan->state == BR_STATE_BLOCKING);
1300}
1301
1302static inline bool
1303br_rports_have_mc_router(const struct net_bridge_mcast *brmctx)
1304{
1305#if IS_ENABLED(CONFIG_IPV6)
1306 return !hlist_empty(&brmctx->ip4_mc_router_list) ||
1307 !hlist_empty(&brmctx->ip6_mc_router_list);
1308#else
1309 return !hlist_empty(&brmctx->ip4_mc_router_list);
1310#endif
1311}
1312
1313static inline bool
1314br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1,
1315 const struct net_bridge_mcast *brmctx2)
1316{
1317 return brmctx1->multicast_igmp_version ==
1318 brmctx2->multicast_igmp_version &&
1319 brmctx1->multicast_last_member_count ==
1320 brmctx2->multicast_last_member_count &&
1321 brmctx1->multicast_startup_query_count ==
1322 brmctx2->multicast_startup_query_count &&
1323 brmctx1->multicast_last_member_interval ==
1324 brmctx2->multicast_last_member_interval &&
1325 brmctx1->multicast_membership_interval ==
1326 brmctx2->multicast_membership_interval &&
1327 brmctx1->multicast_querier_interval ==
1328 brmctx2->multicast_querier_interval &&
1329 brmctx1->multicast_query_interval ==
1330 brmctx2->multicast_query_interval &&
1331 brmctx1->multicast_query_response_interval ==
1332 brmctx2->multicast_query_response_interval &&
1333 brmctx1->multicast_startup_query_interval ==
1334 brmctx2->multicast_startup_query_interval &&
1335 brmctx1->multicast_querier == brmctx2->multicast_querier &&
1336 brmctx1->multicast_router == brmctx2->multicast_router &&
1337 !br_rports_have_mc_router(brmctx1) &&
1338 !br_rports_have_mc_router(brmctx2) &&
1339#if IS_ENABLED(CONFIG_IPV6)
1340 brmctx1->multicast_mld_version ==
1341 brmctx2->multicast_mld_version &&
1342#endif
1343 true;
1344}
1345
1346static inline bool
1347br_multicast_ctx_matches_vlan_snooping(const struct net_bridge_mcast *brmctx)
1348{
1349 bool vlan_snooping_enabled;
1350
1351 vlan_snooping_enabled = !!br_opt_get(brmctx->br,
1352 BROPT_MCAST_VLAN_SNOOPING_ENABLED);
1353
1354 return !!(vlan_snooping_enabled == br_multicast_ctx_is_vlan(brmctx));
1355}
1356
1357static inline void
1358br_multicast_set_pg_offload_flags(struct net_bridge_port_group *p,
1359 bool offloaded)
1360{
1361 p->flags &= ~(MDB_PG_FLAGS_OFFLOAD | MDB_PG_FLAGS_OFFLOAD_FAILED);
1362 p->flags |= (offloaded ? MDB_PG_FLAGS_OFFLOAD :
1363 MDB_PG_FLAGS_OFFLOAD_FAILED);
1364}
1365
1366static inline bool
1367br_mdb_should_notify(const struct net_bridge *br, u8 changed_flags)
1368{
1369 return br_opt_get(br, BROPT_MDB_OFFLOAD_FAIL_NOTIFICATION) &&
1370 (changed_flags & MDB_PG_FLAGS_OFFLOAD_FAILED);
1371}
1372#else
1373static inline int br_multicast_rcv(struct net_bridge_mcast **brmctx,
1374 struct net_bridge_mcast_port **pmctx,
1375 struct net_bridge_vlan *vlan,
1376 struct sk_buff *skb,
1377 u16 vid)
1378{
1379 return 0;
1380}
1381
1382static inline struct net_bridge_mdb_entry *
1383br_mdb_entry_skb_get(struct net_bridge_mcast *brmctx, struct sk_buff *skb,
1384 u16 vid)
1385{
1386 return NULL;
1387}
1388
1389static inline int br_multicast_add_port(struct net_bridge_port *port)
1390{
1391 return 0;
1392}
1393
1394static inline void br_multicast_del_port(struct net_bridge_port *port)
1395{
1396}
1397
1398static inline void br_multicast_enable_port(struct net_bridge_port *port)
1399{
1400}
1401
1402static inline void br_multicast_disable_port(struct net_bridge_port *port)
1403{
1404}
1405
1406static inline void br_multicast_init(struct net_bridge *br)
1407{
1408}
1409
1410static inline void br_multicast_join_snoopers(struct net_bridge *br)
1411{
1412}
1413
1414static inline void br_multicast_leave_snoopers(struct net_bridge *br)
1415{
1416}
1417
1418static inline void br_multicast_open(struct net_bridge *br)
1419{
1420}
1421
1422static inline void br_multicast_stop(struct net_bridge *br)
1423{
1424}
1425
1426static inline void br_multicast_dev_del(struct net_bridge *br)
1427{
1428}
1429
1430static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
1431 struct sk_buff *skb,
1432 struct net_bridge_mcast *brmctx,
1433 bool local_rcv, bool local_orig)
1434{
1435}
1436
1437static inline bool br_multicast_is_router(struct net_bridge_mcast *brmctx,
1438 struct sk_buff *skb)
1439{
1440 return false;
1441}
1442
1443static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1444 struct ethhdr *eth,
1445 const struct net_bridge_mdb_entry *mdb)
1446{
1447 return false;
1448}
1449
1450static inline int br_mdb_add(struct net_device *dev, struct nlattr *tb[],
1451 u16 nlmsg_flags, struct netlink_ext_ack *extack)
1452{
1453 return -EOPNOTSUPP;
1454}
1455
1456static inline int br_mdb_del(struct net_device *dev, struct nlattr *tb[],
1457 struct netlink_ext_ack *extack)
1458{
1459 return -EOPNOTSUPP;
1460}
1461
1462static inline int br_mdb_del_bulk(struct net_device *dev, struct nlattr *tb[],
1463 struct netlink_ext_ack *extack)
1464{
1465 return -EOPNOTSUPP;
1466}
1467
1468static inline int br_mdb_dump(struct net_device *dev, struct sk_buff *skb,
1469 struct netlink_callback *cb)
1470{
1471 return 0;
1472}
1473
1474static inline int br_mdb_get(struct net_device *dev, struct nlattr *tb[],
1475 u32 portid, u32 seq,
1476 struct netlink_ext_ack *extack)
1477{
1478 return -EOPNOTSUPP;
1479}
1480
1481static inline int br_mdb_hash_init(struct net_bridge *br)
1482{
1483 return 0;
1484}
1485
1486static inline void br_mdb_hash_fini(struct net_bridge *br)
1487{
1488}
1489
1490static inline void br_multicast_count(struct net_bridge *br,
1491 const struct net_bridge_port *p,
1492 const struct sk_buff *skb,
1493 u8 type, u8 dir)
1494{
1495}
1496
1497static inline int br_multicast_init_stats(struct net_bridge *br)
1498{
1499 return 0;
1500}
1501
1502static inline void br_multicast_uninit_stats(struct net_bridge *br)
1503{
1504}
1505
1506static inline int br_multicast_igmp_type(const struct sk_buff *skb)
1507{
1508 return 0;
1509}
1510
1511static inline void br_multicast_ctx_init(struct net_bridge *br,
1512 struct net_bridge_vlan *vlan,
1513 struct net_bridge_mcast *brmctx)
1514{
1515}
1516
1517static inline void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx)
1518{
1519}
1520
1521static inline void br_multicast_port_ctx_init(struct net_bridge_port *port,
1522 struct net_bridge_vlan *vlan,
1523 struct net_bridge_mcast_port *pmctx)
1524{
1525}
1526
1527static inline void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx)
1528{
1529}
1530
1531static inline void br_multicast_update_vlan_mcast_ctx(struct net_bridge_vlan *v,
1532 u8 state)
1533{
1534}
1535
1536static inline void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan,
1537 bool on)
1538{
1539}
1540
1541static inline int br_multicast_toggle_vlan_snooping(struct net_bridge *br,
1542 bool on,
1543 struct netlink_ext_ack *extack)
1544{
1545 return -EOPNOTSUPP;
1546}
1547
1548static inline bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan,
1549 bool on)
1550{
1551 return false;
1552}
1553
1554static inline bool
1555br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1,
1556 const struct net_bridge_mcast *brmctx2)
1557{
1558 return true;
1559}
1560#endif
1561
1562/* br_vlan.c */
1563#ifdef CONFIG_BRIDGE_VLAN_FILTERING
1564bool br_allowed_ingress(const struct net_bridge *br,
1565 struct net_bridge_vlan_group *vg, struct sk_buff *skb,
1566 u16 *vid, u8 *state,
1567 struct net_bridge_vlan **vlan);
1568bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1569 const struct sk_buff *skb);
1570bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
1571struct sk_buff *br_handle_vlan(struct net_bridge *br,
1572 const struct net_bridge_port *port,
1573 struct net_bridge_vlan_group *vg,
1574 struct sk_buff *skb);
1575int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1576 bool *changed, struct netlink_ext_ack *extack);
1577int br_vlan_delete(struct net_bridge *br, u16 vid);
1578void br_vlan_flush(struct net_bridge *br);
1579struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
1580void br_recalculate_fwd_mask(struct net_bridge *br);
1581int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val,
1582 struct netlink_ext_ack *extack);
1583int __br_vlan_set_proto(struct net_bridge *br, __be16 proto,
1584 struct netlink_ext_ack *extack);
1585int br_vlan_set_proto(struct net_bridge *br, unsigned long val,
1586 struct netlink_ext_ack *extack);
1587int br_vlan_set_stats(struct net_bridge *br, unsigned long val);
1588int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val);
1589int br_vlan_init(struct net_bridge *br);
1590int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val,
1591 struct netlink_ext_ack *extack);
1592int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid,
1593 struct netlink_ext_ack *extack);
1594int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1595 bool *changed, struct netlink_ext_ack *extack);
1596int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
1597void nbp_vlan_flush(struct net_bridge_port *port);
1598int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack);
1599int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
1600void br_vlan_get_stats(const struct net_bridge_vlan *v,
1601 struct pcpu_sw_netstats *stats);
1602void br_vlan_port_event(struct net_bridge_port *p, unsigned long event);
1603int br_vlan_bridge_event(struct net_device *dev, unsigned long event,
1604 void *ptr);
1605void br_vlan_vlan_upper_event(struct net_device *br_dev,
1606 struct net_device *vlan_dev,
1607 unsigned long event);
1608int br_vlan_rtnl_init(void);
1609void br_vlan_rtnl_uninit(void);
1610void br_vlan_notify(const struct net_bridge *br,
1611 const struct net_bridge_port *p,
1612 u16 vid, u16 vid_range,
1613 int cmd);
1614bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1615 const struct net_bridge_vlan *range_end);
1616
1617void br_vlan_fill_forward_path_pvid(struct net_bridge *br,
1618 struct net_device_path_ctx *ctx,
1619 struct net_device_path *path);
1620int br_vlan_fill_forward_path_mode(struct net_bridge *br,
1621 struct net_bridge_port *dst,
1622 struct net_device_path *path);
1623
1624static inline struct net_bridge_vlan_group *br_vlan_group(
1625 const struct net_bridge *br)
1626{
1627 return rtnl_dereference(br->vlgrp);
1628}
1629
1630static inline struct net_bridge_vlan_group *nbp_vlan_group(
1631 const struct net_bridge_port *p)
1632{
1633 return rtnl_dereference(p->vlgrp);
1634}
1635
1636static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1637 const struct net_bridge *br)
1638{
1639 return rcu_dereference(br->vlgrp);
1640}
1641
1642static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1643 const struct net_bridge_port *p)
1644{
1645 return rcu_dereference(p->vlgrp);
1646}
1647
1648/* Since bridge now depends on 8021Q module, but the time bridge sees the
1649 * skb, the vlan tag will always be present if the frame was tagged.
1650 */
1651static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
1652{
1653 int err = 0;
1654
1655 if (skb_vlan_tag_present(skb)) {
1656 *vid = skb_vlan_tag_get_id(skb);
1657 } else {
1658 *vid = 0;
1659 err = -EINVAL;
1660 }
1661
1662 return err;
1663}
1664
1665static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1666{
1667 if (!vg)
1668 return 0;
1669
1670 smp_rmb();
1671 return vg->pvid;
1672}
1673
1674static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid)
1675{
1676 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags;
1677}
1678#else
1679static inline bool br_allowed_ingress(const struct net_bridge *br,
1680 struct net_bridge_vlan_group *vg,
1681 struct sk_buff *skb,
1682 u16 *vid, u8 *state,
1683 struct net_bridge_vlan **vlan)
1684
1685{
1686 *vlan = NULL;
1687 return true;
1688}
1689
1690static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1691 const struct sk_buff *skb)
1692{
1693 return true;
1694}
1695
1696static inline bool br_should_learn(struct net_bridge_port *p,
1697 struct sk_buff *skb, u16 *vid)
1698{
1699 return true;
1700}
1701
1702static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
1703 const struct net_bridge_port *port,
1704 struct net_bridge_vlan_group *vg,
1705 struct sk_buff *skb)
1706{
1707 return skb;
1708}
1709
1710static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1711 bool *changed, struct netlink_ext_ack *extack)
1712{
1713 *changed = false;
1714 return -EOPNOTSUPP;
1715}
1716
1717static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
1718{
1719 return -EOPNOTSUPP;
1720}
1721
1722static inline void br_vlan_flush(struct net_bridge *br)
1723{
1724}
1725
1726static inline void br_recalculate_fwd_mask(struct net_bridge *br)
1727{
1728}
1729
1730static inline int br_vlan_init(struct net_bridge *br)
1731{
1732 return 0;
1733}
1734
1735static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1736 bool *changed, struct netlink_ext_ack *extack)
1737{
1738 *changed = false;
1739 return -EOPNOTSUPP;
1740}
1741
1742static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
1743{
1744 return -EOPNOTSUPP;
1745}
1746
1747static inline void nbp_vlan_flush(struct net_bridge_port *port)
1748{
1749}
1750
1751static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
1752 u16 vid)
1753{
1754 return NULL;
1755}
1756
1757static inline int nbp_vlan_init(struct net_bridge_port *port,
1758 struct netlink_ext_ack *extack)
1759{
1760 return 0;
1761}
1762
1763static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
1764{
1765 return 0;
1766}
1767
1768static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1769{
1770 return 0;
1771}
1772
1773static inline int br_vlan_filter_toggle(struct net_bridge *br,
1774 unsigned long val,
1775 struct netlink_ext_ack *extack)
1776{
1777 return -EOPNOTSUPP;
1778}
1779
1780static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
1781 u32 filter_mask)
1782{
1783 return 0;
1784}
1785
1786static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br,
1787 struct net_device_path_ctx *ctx,
1788 struct net_device_path *path)
1789{
1790}
1791
1792static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br,
1793 struct net_bridge_port *dst,
1794 struct net_device_path *path)
1795{
1796 return 0;
1797}
1798
1799static inline struct net_bridge_vlan_group *br_vlan_group(
1800 const struct net_bridge *br)
1801{
1802 return NULL;
1803}
1804
1805static inline struct net_bridge_vlan_group *nbp_vlan_group(
1806 const struct net_bridge_port *p)
1807{
1808 return NULL;
1809}
1810
1811static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1812 const struct net_bridge *br)
1813{
1814 return NULL;
1815}
1816
1817static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1818 const struct net_bridge_port *p)
1819{
1820 return NULL;
1821}
1822
1823static inline void br_vlan_get_stats(const struct net_bridge_vlan *v,
1824 struct pcpu_sw_netstats *stats)
1825{
1826}
1827
1828static inline void br_vlan_port_event(struct net_bridge_port *p,
1829 unsigned long event)
1830{
1831}
1832
1833static inline int br_vlan_bridge_event(struct net_device *dev,
1834 unsigned long event, void *ptr)
1835{
1836 return 0;
1837}
1838
1839static inline void br_vlan_vlan_upper_event(struct net_device *br_dev,
1840 struct net_device *vlan_dev,
1841 unsigned long event)
1842{
1843}
1844
1845static inline int br_vlan_rtnl_init(void)
1846{
1847 return 0;
1848}
1849
1850static inline void br_vlan_rtnl_uninit(void)
1851{
1852}
1853
1854static inline void br_vlan_notify(const struct net_bridge *br,
1855 const struct net_bridge_port *p,
1856 u16 vid, u16 vid_range,
1857 int cmd)
1858{
1859}
1860
1861static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1862 const struct net_bridge_vlan *range_end)
1863{
1864 return true;
1865}
1866
1867static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid)
1868{
1869 return 0;
1870}
1871
1872#endif
1873
1874/* br_vlan_options.c */
1875#ifdef CONFIG_BRIDGE_VLAN_FILTERING
1876bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr,
1877 const struct net_bridge_vlan *range_end);
1878bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v,
1879 const struct net_bridge_port *p);
1880size_t br_vlan_opts_nl_size(void);
1881int br_vlan_process_options(const struct net_bridge *br,
1882 const struct net_bridge_port *p,
1883 struct net_bridge_vlan *range_start,
1884 struct net_bridge_vlan *range_end,
1885 struct nlattr **tb,
1886 struct netlink_ext_ack *extack);
1887int br_vlan_rtm_process_global_options(struct net_device *dev,
1888 const struct nlattr *attr,
1889 int cmd,
1890 struct netlink_ext_ack *extack);
1891bool br_vlan_global_opts_can_enter_range(const struct net_bridge_vlan *v_curr,
1892 const struct net_bridge_vlan *r_end);
1893bool br_vlan_global_opts_fill(struct sk_buff *skb, u16 vid, u16 vid_range,
1894 const struct net_bridge_vlan *v_opts);
1895
1896/* vlan state manipulation helpers using *_ONCE to annotate lock-free access,
1897 * while br_vlan_set_state() may access data protected by multicast_lock.
1898 */
1899static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v)
1900{
1901 return READ_ONCE(v->state);
1902}
1903
1904static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state)
1905{
1906 WRITE_ONCE(v->state, state);
1907 br_multicast_update_vlan_mcast_ctx(v, state);
1908}
1909
1910static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg)
1911{
1912 return READ_ONCE(vg->pvid_state);
1913}
1914
1915static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg,
1916 u8 state)
1917{
1918 WRITE_ONCE(vg->pvid_state, state);
1919}
1920
1921/* learn_allow is true at ingress and false at egress */
1922static inline bool br_vlan_state_allowed(u8 state, bool learn_allow)
1923{
1924 switch (state) {
1925 case BR_STATE_LEARNING:
1926 return learn_allow;
1927 case BR_STATE_FORWARDING:
1928 return true;
1929 default:
1930 return false;
1931 }
1932}
1933#endif
1934
1935/* br_mst.c */
1936#ifdef CONFIG_BRIDGE_VLAN_FILTERING
1937DECLARE_STATIC_KEY_FALSE(br_mst_used);
1938static inline bool br_mst_is_enabled(struct net_bridge *br)
1939{
1940 return static_branch_unlikely(&br_mst_used) &&
1941 br_opt_get(br, BROPT_MST_ENABLED);
1942}
1943
1944int br_mst_set_state(struct net_bridge_port *p, u16 msti, u8 state,
1945 struct netlink_ext_ack *extack);
1946int br_mst_vlan_set_msti(struct net_bridge_vlan *v, u16 msti);
1947void br_mst_vlan_init_state(struct net_bridge_vlan *v);
1948int br_mst_set_enabled(struct net_bridge *br, bool on,
1949 struct netlink_ext_ack *extack);
1950size_t br_mst_info_size(const struct net_bridge_vlan_group *vg);
1951int br_mst_fill_info(struct sk_buff *skb,
1952 const struct net_bridge_vlan_group *vg);
1953int br_mst_process(struct net_bridge_port *p, const struct nlattr *mst_attr,
1954 struct netlink_ext_ack *extack);
1955#else
1956static inline bool br_mst_is_enabled(struct net_bridge *br)
1957{
1958 return false;
1959}
1960
1961static inline int br_mst_set_state(struct net_bridge_port *p, u16 msti,
1962 u8 state, struct netlink_ext_ack *extack)
1963{
1964 return -EOPNOTSUPP;
1965}
1966
1967static inline int br_mst_set_enabled(struct net_bridge *br, bool on,
1968 struct netlink_ext_ack *extack)
1969{
1970 return -EOPNOTSUPP;
1971}
1972
1973static inline size_t br_mst_info_size(const struct net_bridge_vlan_group *vg)
1974{
1975 return 0;
1976}
1977
1978static inline int br_mst_fill_info(struct sk_buff *skb,
1979 const struct net_bridge_vlan_group *vg)
1980{
1981 return -EOPNOTSUPP;
1982}
1983
1984static inline int br_mst_process(struct net_bridge_port *p,
1985 const struct nlattr *mst_attr,
1986 struct netlink_ext_ack *extack)
1987{
1988 return -EOPNOTSUPP;
1989}
1990#endif
1991
1992struct nf_br_ops {
1993 int (*br_dev_xmit_hook)(struct sk_buff *skb);
1994};
1995extern const struct nf_br_ops __rcu *nf_br_ops;
1996
1997/* br_netfilter.c */
1998#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1999int br_nf_core_init(void);
2000void br_nf_core_fini(void);
2001void br_netfilter_rtable_init(struct net_bridge *);
2002#else
2003static inline int br_nf_core_init(void) { return 0; }
2004static inline void br_nf_core_fini(void) {}
2005#define br_netfilter_rtable_init(x)
2006#endif
2007
2008/* br_stp.c */
2009void br_set_state(struct net_bridge_port *p, unsigned int state);
2010struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
2011void br_init_port(struct net_bridge_port *p);
2012void br_become_designated_port(struct net_bridge_port *p);
2013
2014void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
2015int br_set_forward_delay(struct net_bridge *br, unsigned long x);
2016int br_set_hello_time(struct net_bridge *br, unsigned long x);
2017int br_set_max_age(struct net_bridge *br, unsigned long x);
2018int __set_ageing_time(struct net_device *dev, unsigned long t);
2019int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time);
2020
2021
2022/* br_stp_if.c */
2023void br_stp_enable_bridge(struct net_bridge *br);
2024void br_stp_disable_bridge(struct net_bridge *br);
2025int br_stp_set_enabled(struct net_bridge *br, unsigned long val,
2026 struct netlink_ext_ack *extack);
2027void br_stp_enable_port(struct net_bridge_port *p);
2028void br_stp_disable_port(struct net_bridge_port *p);
2029bool br_stp_recalculate_bridge_id(struct net_bridge *br);
2030void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
2031void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
2032int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
2033int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
2034ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
2035
2036/* br_stp_bpdu.c */
2037struct stp_proto;
2038void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
2039 struct net_device *dev);
2040
2041/* br_stp_timer.c */
2042void br_stp_timer_init(struct net_bridge *br);
2043void br_stp_port_timer_init(struct net_bridge_port *p);
2044unsigned long br_timer_value(const struct timer_list *timer);
2045
2046/* br.c */
2047#if IS_ENABLED(CONFIG_ATM_LANE)
2048extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
2049#endif
2050
2051/* br_mrp.c */
2052#if IS_ENABLED(CONFIG_BRIDGE_MRP)
2053int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
2054 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
2055bool br_mrp_enabled(struct net_bridge *br);
2056void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p);
2057int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br);
2058#else
2059static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
2060 struct nlattr *attr, int cmd,
2061 struct netlink_ext_ack *extack)
2062{
2063 return -EOPNOTSUPP;
2064}
2065
2066static inline bool br_mrp_enabled(struct net_bridge *br)
2067{
2068 return false;
2069}
2070
2071static inline void br_mrp_port_del(struct net_bridge *br,
2072 struct net_bridge_port *p)
2073{
2074}
2075
2076static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br)
2077{
2078 return 0;
2079}
2080
2081#endif
2082
2083/* br_cfm.c */
2084#if IS_ENABLED(CONFIG_BRIDGE_CFM)
2085int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
2086 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
2087bool br_cfm_created(struct net_bridge *br);
2088void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p);
2089int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br);
2090int br_cfm_status_fill_info(struct sk_buff *skb,
2091 struct net_bridge *br,
2092 bool getlink);
2093int br_cfm_mep_count(struct net_bridge *br, u32 *count);
2094int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count);
2095#else
2096static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
2097 struct nlattr *attr, int cmd,
2098 struct netlink_ext_ack *extack)
2099{
2100 return -EOPNOTSUPP;
2101}
2102
2103static inline bool br_cfm_created(struct net_bridge *br)
2104{
2105 return false;
2106}
2107
2108static inline void br_cfm_port_del(struct net_bridge *br,
2109 struct net_bridge_port *p)
2110{
2111}
2112
2113static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br)
2114{
2115 return -EOPNOTSUPP;
2116}
2117
2118static inline int br_cfm_status_fill_info(struct sk_buff *skb,
2119 struct net_bridge *br,
2120 bool getlink)
2121{
2122 return -EOPNOTSUPP;
2123}
2124
2125static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count)
2126{
2127 *count = 0;
2128 return -EOPNOTSUPP;
2129}
2130
2131static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count)
2132{
2133 *count = 0;
2134 return -EOPNOTSUPP;
2135}
2136#endif
2137
2138/* br_netlink.c */
2139extern struct rtnl_link_ops br_link_ops;
2140int br_netlink_init(void);
2141void br_netlink_fini(void);
2142void br_ifinfo_notify(int event, const struct net_bridge *br,
2143 const struct net_bridge_port *port);
2144void br_info_notify(int event, const struct net_bridge *br,
2145 const struct net_bridge_port *port, u32 filter);
2146int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags,
2147 struct netlink_ext_ack *extack);
2148int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
2149int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
2150 u32 filter_mask, int nlflags);
2151int br_process_vlan_info(struct net_bridge *br,
2152 struct net_bridge_port *p, int cmd,
2153 struct bridge_vlan_info *vinfo_curr,
2154 struct bridge_vlan_info **vinfo_last,
2155 bool *changed,
2156 struct netlink_ext_ack *extack);
2157
2158#ifdef CONFIG_SYSFS
2159/* br_sysfs_if.c */
2160extern const struct sysfs_ops brport_sysfs_ops;
2161int br_sysfs_addif(struct net_bridge_port *p);
2162int br_sysfs_renameif(struct net_bridge_port *p);
2163
2164/* br_sysfs_br.c */
2165int br_sysfs_addbr(struct net_device *dev);
2166void br_sysfs_delbr(struct net_device *dev);
2167
2168#else
2169
2170static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
2171static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
2172static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
2173static inline void br_sysfs_delbr(struct net_device *dev) { return; }
2174#endif /* CONFIG_SYSFS */
2175
2176/* br_switchdev.c */
2177#ifdef CONFIG_NET_SWITCHDEV
2178int br_switchdev_port_offload(struct net_bridge_port *p,
2179 struct net_device *dev, const void *ctx,
2180 struct notifier_block *atomic_nb,
2181 struct notifier_block *blocking_nb,
2182 bool tx_fwd_offload,
2183 struct netlink_ext_ack *extack);
2184
2185void br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx,
2186 struct notifier_block *atomic_nb,
2187 struct notifier_block *blocking_nb);
2188
2189int br_switchdev_port_replay(struct net_bridge_port *p,
2190 struct net_device *dev, const void *ctx,
2191 struct notifier_block *atomic_nb,
2192 struct notifier_block *blocking_nb,
2193 struct netlink_ext_ack *extack);
2194
2195bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb);
2196
2197void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb);
2198
2199void nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p,
2200 struct sk_buff *skb);
2201void nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p,
2202 struct sk_buff *skb);
2203void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
2204 struct sk_buff *skb);
2205bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
2206 const struct sk_buff *skb);
2207int br_switchdev_set_port_flag(struct net_bridge_port *p,
2208 unsigned long flags,
2209 unsigned long mask,
2210 struct netlink_ext_ack *extack);
2211void br_switchdev_fdb_notify(struct net_bridge *br,
2212 const struct net_bridge_fdb_entry *fdb, int type);
2213void br_switchdev_mdb_notify(struct net_device *dev,
2214 struct net_bridge_mdb_entry *mp,
2215 struct net_bridge_port_group *pg,
2216 int type);
2217int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags,
2218 bool changed, struct netlink_ext_ack *extack);
2219int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid);
2220void br_switchdev_init(struct net_bridge *br);
2221
2222static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
2223{
2224 skb->offload_fwd_mark = 0;
2225}
2226#else
2227static inline int
2228br_switchdev_port_offload(struct net_bridge_port *p,
2229 struct net_device *dev, const void *ctx,
2230 struct notifier_block *atomic_nb,
2231 struct notifier_block *blocking_nb,
2232 bool tx_fwd_offload,
2233 struct netlink_ext_ack *extack)
2234{
2235 return -EOPNOTSUPP;
2236}
2237
2238static inline void
2239br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx,
2240 struct notifier_block *atomic_nb,
2241 struct notifier_block *blocking_nb)
2242{
2243}
2244
2245static inline int
2246br_switchdev_port_replay(struct net_bridge_port *p,
2247 struct net_device *dev, const void *ctx,
2248 struct notifier_block *atomic_nb,
2249 struct notifier_block *blocking_nb,
2250 struct netlink_ext_ack *extack)
2251{
2252 return -EOPNOTSUPP;
2253}
2254
2255static inline bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb)
2256{
2257 return false;
2258}
2259
2260static inline void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb)
2261{
2262}
2263
2264static inline void
2265nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p,
2266 struct sk_buff *skb)
2267{
2268}
2269
2270static inline void
2271nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p,
2272 struct sk_buff *skb)
2273{
2274}
2275
2276static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
2277 struct sk_buff *skb)
2278{
2279}
2280
2281static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
2282 const struct sk_buff *skb)
2283{
2284 return true;
2285}
2286
2287static inline int br_switchdev_set_port_flag(struct net_bridge_port *p,
2288 unsigned long flags,
2289 unsigned long mask,
2290 struct netlink_ext_ack *extack)
2291{
2292 return 0;
2293}
2294
2295static inline int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid,
2296 u16 flags, bool changed,
2297 struct netlink_ext_ack *extack)
2298{
2299 return -EOPNOTSUPP;
2300}
2301
2302static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid)
2303{
2304 return -EOPNOTSUPP;
2305}
2306
2307static inline void
2308br_switchdev_fdb_notify(struct net_bridge *br,
2309 const struct net_bridge_fdb_entry *fdb, int type)
2310{
2311}
2312
2313static inline void br_switchdev_mdb_notify(struct net_device *dev,
2314 struct net_bridge_mdb_entry *mp,
2315 struct net_bridge_port_group *pg,
2316 int type)
2317{
2318}
2319
2320static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
2321{
2322}
2323
2324static inline void br_switchdev_init(struct net_bridge *br)
2325{
2326}
2327
2328#endif /* CONFIG_NET_SWITCHDEV */
2329
2330/* br_arp_nd_proxy.c */
2331void br_recalculate_neigh_suppress_enabled(struct net_bridge *br);
2332void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br,
2333 u16 vid, struct net_bridge_port *p);
2334void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br,
2335 u16 vid, struct net_bridge_port *p, struct nd_msg *msg);
2336struct nd_msg *br_is_nd_neigh_msg(const struct sk_buff *skb, struct nd_msg *m);
2337bool br_is_neigh_suppress_enabled(const struct net_bridge_port *p, u16 vid);
2338#endif
2339