1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * Linux ethernet bridge
6 * Lennert Buytenhek <buytenh@gnu.org>
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 <linux/if_vlan.h>
19 #include <linux/rhashtable.h>
20 #include <linux/refcount.h>
22 #define BR_HASH_BITS 8
23 #define BR_HASH_SIZE (1 << BR_HASH_BITS)
25 #define BR_HOLD_TIME (1*HZ)
27 #define BR_PORT_BITS 10
28 #define BR_MAX_PORTS (1<<BR_PORT_BITS)
30 #define BR_MULTICAST_DEFAULT_HASH_MAX 4096
32 #define BR_HWDOM_MAX BITS_PER_LONG
34 #define BR_VERSION "2.3"
36 /* Control of forwarding link local multicast */
37 #define BR_GROUPFWD_DEFAULT 0
38 /* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */
40 BR_GROUPFWD_STP = BIT(0),
41 BR_GROUPFWD_MACPAUSE = BIT(1),
42 BR_GROUPFWD_LACP = BIT(2),
45 #define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \
47 /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
48 #define BR_GROUPFWD_8021AD 0xB801u
50 /* Path to usermode spanning tree program */
51 #define BR_STP_PROG "/sbin/bridge-stp"
53 #define BR_FDB_NOTIFY_SETTABLE_BITS (FDB_NOTIFY_BIT | FDB_NOTIFY_INACTIVE_BIT)
55 typedef struct bridge_id bridge_id;
56 typedef struct mac_addr mac_addr;
57 typedef __u16 port_id;
60 unsigned char prio[2];
61 unsigned char addr[ETH_ALEN];
65 unsigned char addr[ETH_ALEN];
68 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
70 struct bridge_mcast_own_query {
71 struct timer_list timer;
76 struct bridge_mcast_other_query {
77 struct timer_list timer;
78 unsigned long delay_time;
81 /* selected querier */
82 struct bridge_mcast_querier {
84 struct net_bridge_port __rcu *port;
87 /* IGMP/MLD statistics */
88 struct bridge_mcast_stats {
89 struct br_mcast_stats mstats;
90 struct u64_stats_sync syncp;
94 /* net_bridge_mcast_port must be always defined due to forwarding stubs */
95 struct net_bridge_mcast_port {
96 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
97 struct net_bridge_port *port;
98 struct net_bridge_vlan *vlan;
100 struct bridge_mcast_own_query ip4_own_query;
101 struct timer_list ip4_mc_router_timer;
102 struct hlist_node ip4_rlist;
103 #if IS_ENABLED(CONFIG_IPV6)
104 struct bridge_mcast_own_query ip6_own_query;
105 struct timer_list ip6_mc_router_timer;
106 struct hlist_node ip6_rlist;
107 #endif /* IS_ENABLED(CONFIG_IPV6) */
108 unsigned char multicast_router;
109 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */
112 /* net_bridge_mcast must be always defined due to forwarding stubs */
113 struct net_bridge_mcast {
114 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
115 struct net_bridge *br;
116 struct net_bridge_vlan *vlan;
118 u32 multicast_last_member_count;
119 u32 multicast_startup_query_count;
121 u8 multicast_igmp_version;
123 #if IS_ENABLED(CONFIG_IPV6)
124 u8 multicast_mld_version;
126 unsigned long multicast_last_member_interval;
127 unsigned long multicast_membership_interval;
128 unsigned long multicast_querier_interval;
129 unsigned long multicast_query_interval;
130 unsigned long multicast_query_response_interval;
131 unsigned long multicast_startup_query_interval;
132 struct hlist_head ip4_mc_router_list;
133 struct timer_list ip4_mc_router_timer;
134 struct bridge_mcast_other_query ip4_other_query;
135 struct bridge_mcast_own_query ip4_own_query;
136 struct bridge_mcast_querier ip4_querier;
137 #if IS_ENABLED(CONFIG_IPV6)
138 struct hlist_head ip6_mc_router_list;
139 struct timer_list ip6_mc_router_timer;
140 struct bridge_mcast_other_query ip6_other_query;
141 struct bridge_mcast_own_query ip6_own_query;
142 struct bridge_mcast_querier ip6_querier;
143 #endif /* IS_ENABLED(CONFIG_IPV6) */
144 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */
147 struct br_tunnel_info {
149 struct metadata_dst __rcu *tunnel_dst;
152 /* private vlan flags */
154 BR_VLFLAG_PER_PORT_STATS = BIT(0),
155 BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1),
156 BR_VLFLAG_MCAST_ENABLED = BIT(2),
157 BR_VLFLAG_GLOBAL_MCAST_ENABLED = BIT(3),
161 * struct net_bridge_vlan - per-vlan entry
163 * @vnode: rhashtable member
165 * @flags: bridge vlan flags
166 * @priv_flags: private (in-kernel) bridge vlan flags
167 * @state: STP state (e.g. blocking, learning, forwarding)
168 * @stats: per-cpu VLAN statistics
169 * @br: if MASTER flag set, this points to a bridge struct
170 * @port: if MASTER flag unset, this points to a port struct
171 * @refcnt: if MASTER flag set, this is bumped for each port referencing it
172 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
173 * for this VLAN entry
174 * @br_mcast_ctx: if MASTER flag set, this is the global vlan multicast context
175 * @port_mcast_ctx: if MASTER flag unset, this is the per-port/vlan multicast
177 * @vlist: sorted list of VLAN entries
178 * @rcu: used for entry destruction
180 * This structure is shared between the global per-VLAN entries contained in
181 * the bridge rhashtable and the local per-port per-VLAN entries contained in
182 * the port's rhashtable. The union entries should be interpreted depending on
183 * the entry flags that are set.
185 struct net_bridge_vlan {
186 struct rhash_head vnode;
187 struct rhash_head tnode;
192 struct pcpu_sw_netstats __percpu *stats;
194 struct net_bridge *br;
195 struct net_bridge_port *port;
199 struct net_bridge_vlan *brvlan;
202 struct br_tunnel_info tinfo;
205 struct net_bridge_mcast br_mcast_ctx;
206 struct net_bridge_mcast_port port_mcast_ctx;
209 struct list_head vlist;
215 * struct net_bridge_vlan_group
217 * @vlan_hash: VLAN entry rhashtable
218 * @vlan_list: sorted VLAN entry list
219 * @num_vlans: number of total VLAN entries
220 * @pvid: PVID VLAN id
221 * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking)
223 * IMPORTANT: Be careful when checking if there're VLAN entries using list
224 * primitives because the bridge can have entries in its list which
225 * are just for global context but not for filtering, i.e. they have
226 * the master flag set but not the brentry flag. If you have to check
227 * if there're "real" entries in the bridge please test @num_vlans
229 struct net_bridge_vlan_group {
230 struct rhashtable vlan_hash;
231 struct rhashtable tunnel_hash;
232 struct list_head vlan_list;
238 /* bridge fdb flags */
243 BR_FDB_ADDED_BY_USER,
244 BR_FDB_ADDED_BY_EXT_LEARN,
247 BR_FDB_NOTIFY_INACTIVE
250 struct net_bridge_fdb_key {
255 struct net_bridge_fdb_entry {
256 struct rhash_head rhnode;
257 struct net_bridge_port *dst;
259 struct net_bridge_fdb_key key;
260 struct hlist_node fdb_node;
263 /* write-heavy members should not affect lookups */
264 unsigned long updated ____cacheline_aligned_in_smp;
270 #define MDB_PG_FLAGS_PERMANENT BIT(0)
271 #define MDB_PG_FLAGS_OFFLOAD BIT(1)
272 #define MDB_PG_FLAGS_FAST_LEAVE BIT(2)
273 #define MDB_PG_FLAGS_STAR_EXCL BIT(3)
274 #define MDB_PG_FLAGS_BLOCKED BIT(4)
276 #define PG_SRC_ENT_LIMIT 32
278 #define BR_SGRP_F_DELETE BIT(0)
279 #define BR_SGRP_F_SEND BIT(1)
280 #define BR_SGRP_F_INSTALLED BIT(2)
282 struct net_bridge_mcast_gc {
283 struct hlist_node gc_node;
284 void (*destroy)(struct net_bridge_mcast_gc *gc);
287 struct net_bridge_group_src {
288 struct hlist_node node;
291 struct net_bridge_port_group *pg;
293 u8 src_query_rexmit_cnt;
294 struct timer_list timer;
296 struct net_bridge *br;
297 struct net_bridge_mcast_gc mcast_gc;
301 struct net_bridge_port_group_sg_key {
302 struct net_bridge_port *port;
306 struct net_bridge_port_group {
307 struct net_bridge_port_group __rcu *next;
308 struct net_bridge_port_group_sg_key key;
309 unsigned char eth_addr[ETH_ALEN] __aligned(2);
311 unsigned char filter_mode;
312 unsigned char grp_query_rexmit_cnt;
313 unsigned char rt_protocol;
315 struct hlist_head src_list;
316 unsigned int src_ents;
317 struct timer_list timer;
318 struct timer_list rexmit_timer;
319 struct hlist_node mglist;
320 struct rb_root eht_set_tree;
321 struct rb_root eht_host_tree;
323 struct rhash_head rhnode;
324 struct net_bridge_mcast_gc mcast_gc;
328 struct net_bridge_mdb_entry {
329 struct rhash_head rhnode;
330 struct net_bridge *br;
331 struct net_bridge_port_group __rcu *ports;
335 struct timer_list timer;
336 struct hlist_node mdb_node;
338 struct net_bridge_mcast_gc mcast_gc;
342 struct net_bridge_port {
343 struct net_bridge *br;
344 struct net_device *dev;
345 struct list_head list;
348 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
349 struct net_bridge_vlan_group __rcu *vlgrp;
351 struct net_bridge_port __rcu *backup_port;
357 unsigned char topology_change_ack;
358 unsigned char config_pending;
360 port_id designated_port;
361 bridge_id designated_root;
362 bridge_id designated_bridge;
365 unsigned long designated_age;
367 struct timer_list forward_delay_timer;
368 struct timer_list hold_timer;
369 struct timer_list message_age_timer;
373 struct net_bridge_mcast_port multicast_ctx;
375 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
376 struct bridge_mcast_stats __percpu *mcast_stats;
378 u32 multicast_eht_hosts_limit;
379 u32 multicast_eht_hosts_cnt;
380 struct hlist_head mglist;
384 char sysfs_name[IFNAMSIZ];
387 #ifdef CONFIG_NET_POLL_CONTROLLER
390 #ifdef CONFIG_NET_SWITCHDEV
391 /* Identifier used to group ports that share the same switchdev
396 struct netdev_phys_item_id ppid;
399 u16 backup_redirected_cnt;
401 struct bridge_stp_xstats stp_xstats;
404 #define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj)
406 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
407 #define br_promisc_port(p) ((p)->flags & BR_PROMISC)
409 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
411 return rcu_dereference(dev->rx_handler_data);
414 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
416 return netif_is_bridge_port(dev) ?
417 rtnl_dereference(dev->rx_handler_data) : NULL;
420 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev)
422 return netif_is_bridge_port(dev) ?
423 rcu_dereference_rtnl(dev->rx_handler_data) : NULL;
426 enum net_bridge_opts {
428 BROPT_VLAN_STATS_ENABLED,
429 BROPT_NF_CALL_IPTABLES,
430 BROPT_NF_CALL_IP6TABLES,
431 BROPT_NF_CALL_ARPTABLES,
432 BROPT_GROUP_ADDR_SET,
433 BROPT_MULTICAST_ENABLED,
434 BROPT_MULTICAST_QUERIER,
435 BROPT_MULTICAST_QUERY_USE_IFADDR,
436 BROPT_MULTICAST_STATS_ENABLED,
438 BROPT_NEIGH_SUPPRESS_ENABLED,
439 BROPT_MTU_SET_BY_USER,
440 BROPT_VLAN_STATS_PER_PORT,
442 BROPT_VLAN_BRIDGE_BINDING,
443 BROPT_MCAST_VLAN_SNOOPING_ENABLED,
448 spinlock_t hash_lock;
449 struct hlist_head frame_type_list;
450 struct net_device *dev;
451 unsigned long options;
452 /* These fields are accessed on each packet */
453 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
456 struct net_bridge_vlan_group __rcu *vlgrp;
459 struct rhashtable fdb_hash_tbl;
460 struct list_head port_list;
461 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
463 struct rtable fake_rtable;
464 struct rt6_info fake_rt6_info;
468 u16 group_fwd_mask_required;
471 bridge_id designated_root;
473 unsigned char topology_change;
474 unsigned char topology_change_detected;
476 unsigned long max_age;
477 unsigned long hello_time;
478 unsigned long forward_delay;
479 unsigned long ageing_time;
480 unsigned long bridge_max_age;
481 unsigned long bridge_hello_time;
482 unsigned long bridge_forward_delay;
483 unsigned long bridge_ageing_time;
486 u8 group_addr[ETH_ALEN];
489 BR_NO_STP, /* no spanning tree */
490 BR_KERNEL_STP, /* old STP in kernel */
491 BR_USER_STP, /* new RSTP in userspace */
494 struct net_bridge_mcast multicast_ctx;
496 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
497 struct bridge_mcast_stats __percpu *mcast_stats;
501 spinlock_t multicast_lock;
503 struct rhashtable mdb_hash_tbl;
504 struct rhashtable sg_port_tbl;
506 struct hlist_head mcast_gc_list;
507 struct hlist_head mdb_list;
509 struct work_struct mcast_gc_work;
512 struct timer_list hello_timer;
513 struct timer_list tcn_timer;
514 struct timer_list topology_change_timer;
515 struct delayed_work gc_work;
516 struct kobject *ifobj;
519 #ifdef CONFIG_NET_SWITCHDEV
520 /* Counter used to make sure that hardware domains get unique
521 * identifiers in case a bridge spans multiple switchdev instances.
524 /* Bit mask of hardware domain numbers in use */
525 unsigned long busy_hwdoms;
527 struct hlist_head fdb_list;
529 #if IS_ENABLED(CONFIG_BRIDGE_MRP)
530 struct hlist_head mrp_list;
532 #if IS_ENABLED(CONFIG_BRIDGE_CFM)
533 struct hlist_head mep_list;
537 struct br_input_skb_cb {
538 struct net_device *brdev;
541 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
545 u8 proxyarp_replied:1;
546 u8 src_port_isolated:1;
547 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
550 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
551 u8 br_netfilter_broute:1;
554 #ifdef CONFIG_NET_SWITCHDEV
555 /* Set if TX data plane offloading is used towards at least one
559 /* The switchdev hardware domain from which this packet was received.
560 * If skb->offload_fwd_mark was set, then this packet was already
561 * forwarded by hardware to the other ports in the source hardware
562 * domain, otherwise it wasn't.
565 /* Bit mask of hardware domains towards this packet has already been
566 * transmitted using the TX data plane offload.
568 unsigned long fwd_hwdoms;
572 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
574 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
575 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
577 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
580 #define br_printk(level, br, format, args...) \
581 printk(level "%s: " format, (br)->dev->name, ##args)
583 #define br_err(__br, format, args...) \
584 br_printk(KERN_ERR, __br, format, ##args)
585 #define br_warn(__br, format, args...) \
586 br_printk(KERN_WARNING, __br, format, ##args)
587 #define br_notice(__br, format, args...) \
588 br_printk(KERN_NOTICE, __br, format, ##args)
589 #define br_info(__br, format, args...) \
590 br_printk(KERN_INFO, __br, format, ##args)
592 #define br_debug(br, format, args...) \
593 pr_debug("%s: " format, (br)->dev->name, ##args)
595 /* called under bridge lock */
596 static inline int br_is_root_bridge(const struct net_bridge *br)
598 return !memcmp(&br->bridge_id, &br->designated_root, 8);
601 /* check if a VLAN entry is global */
602 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
604 return v->flags & BRIDGE_VLAN_INFO_MASTER;
607 /* check if a VLAN entry is used by the bridge */
608 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
610 return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
613 /* check if we should use the vlan entry, returns false if it's only context */
614 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
616 if (br_vlan_is_master(v)) {
617 if (br_vlan_is_brentry(v))
626 static inline bool nbp_state_should_learn(const struct net_bridge_port *p)
628 return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING;
631 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack)
633 bool ret = vid > 0 && vid < VLAN_VID_MASK;
636 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid");
641 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur,
642 const struct bridge_vlan_info *last,
643 struct netlink_ext_ack *extack)
645 /* pvid flag is not allowed in ranges */
646 if (cur->flags & BRIDGE_VLAN_INFO_PVID) {
647 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range");
651 /* when cur is the range end, check if:
652 * - it has range start flag
653 * - range ids are invalid (end is equal to or before start)
656 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
657 NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one");
659 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) {
660 NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing");
662 } else if (cur->vid <= last->vid) {
663 NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id");
668 /* check for required range flags */
669 if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN |
670 BRIDGE_VLAN_INFO_RANGE_END))) {
671 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing");
678 static inline int br_afspec_cmd_to_rtm(int cmd)
690 static inline int br_opt_get(const struct net_bridge *br,
691 enum net_bridge_opts opt)
693 return test_bit(opt, &br->options);
696 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
697 struct netlink_ext_ack *extack);
698 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt);
699 int br_boolopt_multi_toggle(struct net_bridge *br,
700 struct br_boolopt_multi *bm,
701 struct netlink_ext_ack *extack);
702 void br_boolopt_multi_get(const struct net_bridge *br,
703 struct br_boolopt_multi *bm);
704 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on);
707 void br_dev_setup(struct net_device *dev);
708 void br_dev_delete(struct net_device *dev, struct list_head *list);
709 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
710 #ifdef CONFIG_NET_POLL_CONTROLLER
711 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
714 netpoll_send_skb(p->np, skb);
717 int br_netpoll_enable(struct net_bridge_port *p);
718 void br_netpoll_disable(struct net_bridge_port *p);
720 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
725 static inline int br_netpoll_enable(struct net_bridge_port *p)
730 static inline void br_netpoll_disable(struct net_bridge_port *p)
736 int br_fdb_init(void);
737 void br_fdb_fini(void);
738 int br_fdb_hash_init(struct net_bridge *br);
739 void br_fdb_hash_fini(struct net_bridge *br);
740 void br_fdb_flush(struct net_bridge *br);
741 void br_fdb_find_delete_local(struct net_bridge *br,
742 const struct net_bridge_port *p,
743 const unsigned char *addr, u16 vid);
744 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
745 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
746 void br_fdb_cleanup(struct work_struct *work);
747 void br_fdb_delete_by_port(struct net_bridge *br,
748 const struct net_bridge_port *p, u16 vid, int do_all);
749 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br,
750 const unsigned char *addr,
752 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
753 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
755 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
756 const unsigned char *addr, u16 vid);
757 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
758 const unsigned char *addr, u16 vid, unsigned long flags);
760 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
761 struct net_device *dev, const unsigned char *addr, u16 vid);
762 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
763 const unsigned char *addr, u16 vid, u16 nlh_flags,
764 struct netlink_ext_ack *extack);
765 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
766 struct net_device *dev, struct net_device *fdev, int *idx);
767 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev,
768 const unsigned char *addr, u16 vid, u32 portid, u32 seq,
769 struct netlink_ext_ack *extack);
770 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
771 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
772 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
773 const unsigned char *addr, u16 vid, bool is_local,
775 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
776 const unsigned char *addr, u16 vid,
778 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p,
779 const unsigned char *addr, u16 vid, bool offloaded);
780 int br_fdb_replay(const struct net_device *br_dev, const void *ctx, bool adding,
781 struct notifier_block *nb);
789 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
790 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
791 bool local_rcv, bool local_orig);
792 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
793 void br_flood(struct net_bridge *br, struct sk_buff *skb,
794 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig);
796 /* return true if both source port and dest port are isolated */
797 static inline bool br_skb_isolated(const struct net_bridge_port *to,
798 const struct sk_buff *skb)
800 return BR_INPUT_SKB_CB(skb)->src_port_isolated &&
801 (to->flags & BR_ISOLATED);
805 void br_port_carrier_check(struct net_bridge_port *p, bool *notified);
806 int br_add_bridge(struct net *net, const char *name);
807 int br_del_bridge(struct net *net, const char *name);
808 int br_add_if(struct net_bridge *br, struct net_device *dev,
809 struct netlink_ext_ack *extack);
810 int br_del_if(struct net_bridge *br, struct net_device *dev);
811 void br_mtu_auto_adjust(struct net_bridge *br);
812 netdev_features_t br_features_recompute(struct net_bridge *br,
813 netdev_features_t features);
814 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
815 void br_manage_promisc(struct net_bridge *br);
816 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev);
819 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
820 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev);
822 struct br_frame_type {
824 int (*frame_handler)(struct net_bridge_port *port,
825 struct sk_buff *skb);
826 struct hlist_node list;
829 void br_add_frame(struct net_bridge *br, struct br_frame_type *ft);
830 void br_del_frame(struct net_bridge *br, struct br_frame_type *ft);
832 static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
834 return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev);
837 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev)
839 return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev);
842 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
844 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
847 static inline struct net_bridge_port *
848 br_port_get_check_rtnl(const struct net_device *dev)
850 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL;
854 int br_dev_siocdevprivate(struct net_device *dev, struct ifreq *rq,
855 void __user *data, int cmd);
856 int br_ioctl_stub(struct net *net, struct net_bridge *br, unsigned int cmd,
857 struct ifreq *ifr, void __user *uarg);
860 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
861 int br_multicast_rcv(struct net_bridge_mcast **brmctx,
862 struct net_bridge_mcast_port **pmctx,
863 struct net_bridge_vlan *vlan,
864 struct sk_buff *skb, u16 vid);
865 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx,
866 struct sk_buff *skb, u16 vid);
867 int br_multicast_add_port(struct net_bridge_port *port);
868 void br_multicast_del_port(struct net_bridge_port *port);
869 void br_multicast_enable_port(struct net_bridge_port *port);
870 void br_multicast_disable_port(struct net_bridge_port *port);
871 void br_multicast_init(struct net_bridge *br);
872 void br_multicast_join_snoopers(struct net_bridge *br);
873 void br_multicast_leave_snoopers(struct net_bridge *br);
874 void br_multicast_open(struct net_bridge *br);
875 void br_multicast_stop(struct net_bridge *br);
876 void br_multicast_dev_del(struct net_bridge *br);
877 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, struct sk_buff *skb,
878 struct net_bridge_mcast *brmctx,
879 bool local_rcv, bool local_orig);
880 int br_multicast_set_router(struct net_bridge *br, unsigned long val);
881 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
882 int br_multicast_toggle(struct net_bridge *br, unsigned long val,
883 struct netlink_ext_ack *extack);
884 int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
885 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
886 int br_multicast_set_igmp_version(struct net_bridge_mcast *brmctx,
888 #if IS_ENABLED(CONFIG_IPV6)
889 int br_multicast_set_mld_version(struct net_bridge_mcast *brmctx,
892 struct net_bridge_mdb_entry *
893 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst);
894 struct net_bridge_mdb_entry *
895 br_multicast_new_group(struct net_bridge *br, struct br_ip *group);
896 struct net_bridge_port_group *
897 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
898 struct net_bridge_port_group __rcu *next,
899 unsigned char flags, const unsigned char *src,
900 u8 filter_mode, u8 rt_protocol);
901 int br_mdb_hash_init(struct net_bridge *br);
902 void br_mdb_hash_fini(struct net_bridge *br);
903 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp,
904 struct net_bridge_port_group *pg, int type);
905 void br_rtr_notify(struct net_device *dev, struct net_bridge_mcast_port *pmctx,
907 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp,
908 struct net_bridge_port_group *pg,
909 struct net_bridge_port_group __rcu **pp);
910 void br_multicast_count(struct net_bridge *br,
911 const struct net_bridge_port *p,
912 const struct sk_buff *skb, u8 type, u8 dir);
913 int br_multicast_init_stats(struct net_bridge *br);
914 void br_multicast_uninit_stats(struct net_bridge *br);
915 void br_multicast_get_stats(const struct net_bridge *br,
916 const struct net_bridge_port *p,
917 struct br_mcast_stats *dest);
918 void br_mdb_init(void);
919 void br_mdb_uninit(void);
920 void br_multicast_host_join(const struct net_bridge_mcast *brmctx,
921 struct net_bridge_mdb_entry *mp, bool notify);
922 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify);
923 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg,
925 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp,
926 struct net_bridge_port_group *sg);
927 struct net_bridge_group_src *
928 br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip);
929 void br_multicast_del_group_src(struct net_bridge_group_src *src,
931 void br_multicast_ctx_init(struct net_bridge *br,
932 struct net_bridge_vlan *vlan,
933 struct net_bridge_mcast *brmctx);
934 void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx);
935 void br_multicast_port_ctx_init(struct net_bridge_port *port,
936 struct net_bridge_vlan *vlan,
937 struct net_bridge_mcast_port *pmctx);
938 void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx);
939 void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on);
940 void br_multicast_toggle_vlan(struct net_bridge_vlan *vlan, bool on);
941 int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on,
942 struct netlink_ext_ack *extack);
943 bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on);
945 int br_mdb_replay(struct net_device *br_dev, struct net_device *dev,
946 const void *ctx, bool adding, struct notifier_block *nb,
947 struct netlink_ext_ack *extack);
949 static inline bool br_group_is_l2(const struct br_ip *group)
951 return group->proto == 0;
954 #define mlock_dereference(X, br) \
955 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
957 static inline struct hlist_node *
958 br_multicast_get_first_rport_node(struct net_bridge_mcast *brmctx,
961 #if IS_ENABLED(CONFIG_IPV6)
962 if (skb->protocol == htons(ETH_P_IPV6))
963 return rcu_dereference(hlist_first_rcu(&brmctx->ip6_mc_router_list));
965 return rcu_dereference(hlist_first_rcu(&brmctx->ip4_mc_router_list));
968 static inline struct net_bridge_port *
969 br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb)
971 struct net_bridge_mcast_port *mctx;
973 #if IS_ENABLED(CONFIG_IPV6)
974 if (skb->protocol == htons(ETH_P_IPV6))
975 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port,
979 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port,
988 static inline bool br_ip4_multicast_is_router(struct net_bridge_mcast *brmctx)
990 return timer_pending(&brmctx->ip4_mc_router_timer);
993 static inline bool br_ip6_multicast_is_router(struct net_bridge_mcast *brmctx)
995 #if IS_ENABLED(CONFIG_IPV6)
996 return timer_pending(&brmctx->ip6_mc_router_timer);
1003 br_multicast_is_router(struct net_bridge_mcast *brmctx, struct sk_buff *skb)
1005 switch (brmctx->multicast_router) {
1006 case MDB_RTR_TYPE_PERM:
1008 case MDB_RTR_TYPE_TEMP_QUERY:
1010 if (skb->protocol == htons(ETH_P_IP))
1011 return br_ip4_multicast_is_router(brmctx);
1012 else if (skb->protocol == htons(ETH_P_IPV6))
1013 return br_ip6_multicast_is_router(brmctx);
1015 return br_ip4_multicast_is_router(brmctx) ||
1016 br_ip6_multicast_is_router(brmctx);
1025 __br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1026 struct bridge_mcast_other_query *querier,
1029 bool own_querier_enabled;
1031 if (br_opt_get(brmctx->br, BROPT_MULTICAST_QUERIER)) {
1032 if (is_ipv6 && !br_opt_get(brmctx->br, BROPT_HAS_IPV6_ADDR))
1033 own_querier_enabled = false;
1035 own_querier_enabled = true;
1037 own_querier_enabled = false;
1040 return time_is_before_jiffies(querier->delay_time) &&
1041 (own_querier_enabled || timer_pending(&querier->timer));
1044 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1046 const struct net_bridge_mdb_entry *mdb)
1048 switch (eth->h_proto) {
1049 case (htons(ETH_P_IP)):
1050 return __br_multicast_querier_exists(brmctx,
1051 &brmctx->ip4_other_query, false);
1052 #if IS_ENABLED(CONFIG_IPV6)
1053 case (htons(ETH_P_IPV6)):
1054 return __br_multicast_querier_exists(brmctx,
1055 &brmctx->ip6_other_query, true);
1058 return !!mdb && br_group_is_l2(&mdb->addr);
1062 static inline bool br_multicast_is_star_g(const struct br_ip *ip)
1064 switch (ip->proto) {
1065 case htons(ETH_P_IP):
1066 return ipv4_is_zeronet(ip->src.ip4);
1067 #if IS_ENABLED(CONFIG_IPV6)
1068 case htons(ETH_P_IPV6):
1069 return ipv6_addr_any(&ip->src.ip6);
1077 br_multicast_should_handle_mode(const struct net_bridge_mcast *brmctx,
1081 case htons(ETH_P_IP):
1082 return !!(brmctx->multicast_igmp_version == 3);
1083 #if IS_ENABLED(CONFIG_IPV6)
1084 case htons(ETH_P_IPV6):
1085 return !!(brmctx->multicast_mld_version == 2);
1092 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
1094 return BR_INPUT_SKB_CB(skb)->igmp;
1097 static inline unsigned long br_multicast_lmqt(const struct net_bridge_mcast *brmctx)
1099 return brmctx->multicast_last_member_interval *
1100 brmctx->multicast_last_member_count;
1103 static inline unsigned long br_multicast_gmi(const struct net_bridge_mcast *brmctx)
1105 /* use the RFC default of 2 for QRV */
1106 return 2 * brmctx->multicast_query_interval +
1107 brmctx->multicast_query_response_interval;
1111 br_multicast_ctx_is_vlan(const struct net_bridge_mcast *brmctx)
1113 return !!brmctx->vlan;
1117 br_multicast_port_ctx_is_vlan(const struct net_bridge_mcast_port *pmctx)
1119 return !!pmctx->vlan;
1122 static inline struct net_bridge_mcast *
1123 br_multicast_port_ctx_get_global(const struct net_bridge_mcast_port *pmctx)
1125 if (!br_multicast_port_ctx_is_vlan(pmctx))
1126 return &pmctx->port->br->multicast_ctx;
1128 return &pmctx->vlan->brvlan->br_mcast_ctx;
1132 br_multicast_ctx_vlan_global_disabled(const struct net_bridge_mcast *brmctx)
1134 return br_opt_get(brmctx->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) &&
1135 br_multicast_ctx_is_vlan(brmctx) &&
1136 !(brmctx->vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED);
1140 br_multicast_ctx_vlan_disabled(const struct net_bridge_mcast *brmctx)
1142 return br_multicast_ctx_is_vlan(brmctx) &&
1143 !(brmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED);
1147 br_multicast_port_ctx_vlan_disabled(const struct net_bridge_mcast_port *pmctx)
1149 return br_multicast_port_ctx_is_vlan(pmctx) &&
1150 !(pmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED);
1154 br_multicast_port_ctx_state_disabled(const struct net_bridge_mcast_port *pmctx)
1156 return pmctx->port->state == BR_STATE_DISABLED ||
1157 (br_multicast_port_ctx_is_vlan(pmctx) &&
1158 (br_multicast_port_ctx_vlan_disabled(pmctx) ||
1159 pmctx->vlan->state == BR_STATE_DISABLED));
1163 br_multicast_port_ctx_state_stopped(const struct net_bridge_mcast_port *pmctx)
1165 return br_multicast_port_ctx_state_disabled(pmctx) ||
1166 pmctx->port->state == BR_STATE_BLOCKING ||
1167 (br_multicast_port_ctx_is_vlan(pmctx) &&
1168 pmctx->vlan->state == BR_STATE_BLOCKING);
1172 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1,
1173 const struct net_bridge_mcast *brmctx2)
1175 return brmctx1->multicast_igmp_version ==
1176 brmctx2->multicast_igmp_version &&
1177 brmctx1->multicast_last_member_count ==
1178 brmctx2->multicast_last_member_count &&
1179 brmctx1->multicast_startup_query_count ==
1180 brmctx2->multicast_startup_query_count &&
1181 brmctx1->multicast_last_member_interval ==
1182 brmctx2->multicast_last_member_interval &&
1183 brmctx1->multicast_membership_interval ==
1184 brmctx2->multicast_membership_interval &&
1185 #if IS_ENABLED(CONFIG_IPV6)
1186 brmctx1->multicast_mld_version ==
1187 brmctx2->multicast_mld_version &&
1192 static inline int br_multicast_rcv(struct net_bridge_mcast **brmctx,
1193 struct net_bridge_mcast_port **pmctx,
1194 struct net_bridge_vlan *vlan,
1195 struct sk_buff *skb,
1201 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx,
1202 struct sk_buff *skb, u16 vid)
1207 static inline int br_multicast_add_port(struct net_bridge_port *port)
1212 static inline void br_multicast_del_port(struct net_bridge_port *port)
1216 static inline void br_multicast_enable_port(struct net_bridge_port *port)
1220 static inline void br_multicast_disable_port(struct net_bridge_port *port)
1224 static inline void br_multicast_init(struct net_bridge *br)
1228 static inline void br_multicast_join_snoopers(struct net_bridge *br)
1232 static inline void br_multicast_leave_snoopers(struct net_bridge *br)
1236 static inline void br_multicast_open(struct net_bridge *br)
1240 static inline void br_multicast_stop(struct net_bridge *br)
1244 static inline void br_multicast_dev_del(struct net_bridge *br)
1248 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
1249 struct sk_buff *skb,
1250 struct net_bridge_mcast *brmctx,
1251 bool local_rcv, bool local_orig)
1255 static inline bool br_multicast_is_router(struct net_bridge_mcast *brmctx,
1256 struct sk_buff *skb)
1261 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1263 const struct net_bridge_mdb_entry *mdb)
1268 static inline void br_mdb_init(void)
1272 static inline void br_mdb_uninit(void)
1276 static inline int br_mdb_hash_init(struct net_bridge *br)
1281 static inline void br_mdb_hash_fini(struct net_bridge *br)
1285 static inline void br_multicast_count(struct net_bridge *br,
1286 const struct net_bridge_port *p,
1287 const struct sk_buff *skb,
1292 static inline int br_multicast_init_stats(struct net_bridge *br)
1297 static inline void br_multicast_uninit_stats(struct net_bridge *br)
1301 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
1306 static inline void br_multicast_ctx_init(struct net_bridge *br,
1307 struct net_bridge_vlan *vlan,
1308 struct net_bridge_mcast *brmctx)
1312 static inline void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx)
1316 static inline void br_multicast_port_ctx_init(struct net_bridge_port *port,
1317 struct net_bridge_vlan *vlan,
1318 struct net_bridge_mcast_port *pmctx)
1322 static inline void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx)
1326 static inline void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan,
1331 static inline void br_multicast_toggle_vlan(struct net_bridge_vlan *vlan,
1336 static inline int br_multicast_toggle_vlan_snooping(struct net_bridge *br,
1338 struct netlink_ext_ack *extack)
1343 static inline bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan,
1349 static inline int br_mdb_replay(struct net_device *br_dev,
1350 struct net_device *dev, const void *ctx,
1351 bool adding, struct notifier_block *nb,
1352 struct netlink_ext_ack *extack)
1358 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1,
1359 const struct net_bridge_mcast *brmctx2)
1366 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1367 bool br_allowed_ingress(const struct net_bridge *br,
1368 struct net_bridge_vlan_group *vg, struct sk_buff *skb,
1369 u16 *vid, u8 *state,
1370 struct net_bridge_vlan **vlan);
1371 bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1372 const struct sk_buff *skb);
1373 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
1374 struct sk_buff *br_handle_vlan(struct net_bridge *br,
1375 const struct net_bridge_port *port,
1376 struct net_bridge_vlan_group *vg,
1377 struct sk_buff *skb);
1378 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1379 bool *changed, struct netlink_ext_ack *extack);
1380 int br_vlan_delete(struct net_bridge *br, u16 vid);
1381 void br_vlan_flush(struct net_bridge *br);
1382 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
1383 void br_recalculate_fwd_mask(struct net_bridge *br);
1384 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val,
1385 struct netlink_ext_ack *extack);
1386 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto,
1387 struct netlink_ext_ack *extack);
1388 int br_vlan_set_proto(struct net_bridge *br, unsigned long val,
1389 struct netlink_ext_ack *extack);
1390 int br_vlan_set_stats(struct net_bridge *br, unsigned long val);
1391 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val);
1392 int br_vlan_init(struct net_bridge *br);
1393 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val,
1394 struct netlink_ext_ack *extack);
1395 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid,
1396 struct netlink_ext_ack *extack);
1397 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1398 bool *changed, struct netlink_ext_ack *extack);
1399 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
1400 void nbp_vlan_flush(struct net_bridge_port *port);
1401 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack);
1402 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
1403 void br_vlan_get_stats(const struct net_bridge_vlan *v,
1404 struct pcpu_sw_netstats *stats);
1405 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event);
1406 int br_vlan_bridge_event(struct net_device *dev, unsigned long event,
1408 void br_vlan_rtnl_init(void);
1409 void br_vlan_rtnl_uninit(void);
1410 void br_vlan_notify(const struct net_bridge *br,
1411 const struct net_bridge_port *p,
1412 u16 vid, u16 vid_range,
1414 int br_vlan_replay(struct net_device *br_dev, struct net_device *dev,
1415 const void *ctx, bool adding, struct notifier_block *nb,
1416 struct netlink_ext_ack *extack);
1417 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1418 const struct net_bridge_vlan *range_end);
1420 void br_vlan_fill_forward_path_pvid(struct net_bridge *br,
1421 struct net_device_path_ctx *ctx,
1422 struct net_device_path *path);
1423 int br_vlan_fill_forward_path_mode(struct net_bridge *br,
1424 struct net_bridge_port *dst,
1425 struct net_device_path *path);
1427 static inline struct net_bridge_vlan_group *br_vlan_group(
1428 const struct net_bridge *br)
1430 return rtnl_dereference(br->vlgrp);
1433 static inline struct net_bridge_vlan_group *nbp_vlan_group(
1434 const struct net_bridge_port *p)
1436 return rtnl_dereference(p->vlgrp);
1439 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1440 const struct net_bridge *br)
1442 return rcu_dereference(br->vlgrp);
1445 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1446 const struct net_bridge_port *p)
1448 return rcu_dereference(p->vlgrp);
1451 /* Since bridge now depends on 8021Q module, but the time bridge sees the
1452 * skb, the vlan tag will always be present if the frame was tagged.
1454 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
1458 if (skb_vlan_tag_present(skb)) {
1459 *vid = skb_vlan_tag_get_id(skb);
1468 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1477 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid)
1479 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags;
1482 static inline bool br_allowed_ingress(const struct net_bridge *br,
1483 struct net_bridge_vlan_group *vg,
1484 struct sk_buff *skb,
1485 u16 *vid, u8 *state,
1486 struct net_bridge_vlan **vlan)
1493 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1494 const struct sk_buff *skb)
1499 static inline bool br_should_learn(struct net_bridge_port *p,
1500 struct sk_buff *skb, u16 *vid)
1505 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
1506 const struct net_bridge_port *port,
1507 struct net_bridge_vlan_group *vg,
1508 struct sk_buff *skb)
1513 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1514 bool *changed, struct netlink_ext_ack *extack)
1520 static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
1525 static inline void br_vlan_flush(struct net_bridge *br)
1529 static inline void br_recalculate_fwd_mask(struct net_bridge *br)
1533 static inline int br_vlan_init(struct net_bridge *br)
1538 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1539 bool *changed, struct netlink_ext_ack *extack)
1545 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
1550 static inline void nbp_vlan_flush(struct net_bridge_port *port)
1554 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
1560 static inline int nbp_vlan_init(struct net_bridge_port *port,
1561 struct netlink_ext_ack *extack)
1566 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
1571 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1576 static inline int br_vlan_filter_toggle(struct net_bridge *br,
1578 struct netlink_ext_ack *extack)
1583 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
1589 static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br,
1590 struct net_device_path_ctx *ctx,
1591 struct net_device_path *path)
1595 static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br,
1596 struct net_bridge_port *dst,
1597 struct net_device_path *path)
1602 static inline struct net_bridge_vlan_group *br_vlan_group(
1603 const struct net_bridge *br)
1608 static inline struct net_bridge_vlan_group *nbp_vlan_group(
1609 const struct net_bridge_port *p)
1614 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1615 const struct net_bridge *br)
1620 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1621 const struct net_bridge_port *p)
1626 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v,
1627 struct pcpu_sw_netstats *stats)
1631 static inline void br_vlan_port_event(struct net_bridge_port *p,
1632 unsigned long event)
1636 static inline int br_vlan_bridge_event(struct net_device *dev,
1637 unsigned long event, void *ptr)
1642 static inline void br_vlan_rtnl_init(void)
1646 static inline void br_vlan_rtnl_uninit(void)
1650 static inline void br_vlan_notify(const struct net_bridge *br,
1651 const struct net_bridge_port *p,
1652 u16 vid, u16 vid_range,
1657 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1658 const struct net_bridge_vlan *range_end)
1663 static inline int br_vlan_replay(struct net_device *br_dev,
1664 struct net_device *dev, const void *ctx,
1665 bool adding, struct notifier_block *nb,
1666 struct netlink_ext_ack *extack)
1672 /* br_vlan_options.c */
1673 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1674 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr,
1675 const struct net_bridge_vlan *range_end);
1676 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v);
1677 size_t br_vlan_opts_nl_size(void);
1678 int br_vlan_process_options(const struct net_bridge *br,
1679 const struct net_bridge_port *p,
1680 struct net_bridge_vlan *range_start,
1681 struct net_bridge_vlan *range_end,
1683 struct netlink_ext_ack *extack);
1684 int br_vlan_rtm_process_global_options(struct net_device *dev,
1685 const struct nlattr *attr,
1687 struct netlink_ext_ack *extack);
1688 bool br_vlan_global_opts_can_enter_range(const struct net_bridge_vlan *v_curr,
1689 const struct net_bridge_vlan *r_end);
1690 bool br_vlan_global_opts_fill(struct sk_buff *skb, u16 vid, u16 vid_range,
1691 const struct net_bridge_vlan *v_opts);
1693 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */
1694 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v)
1696 return READ_ONCE(v->state);
1699 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state)
1701 WRITE_ONCE(v->state, state);
1704 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg)
1706 return READ_ONCE(vg->pvid_state);
1709 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg,
1712 WRITE_ONCE(vg->pvid_state, state);
1715 /* learn_allow is true at ingress and false at egress */
1716 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow)
1719 case BR_STATE_LEARNING:
1721 case BR_STATE_FORWARDING:
1730 int (*br_dev_xmit_hook)(struct sk_buff *skb);
1732 extern const struct nf_br_ops __rcu *nf_br_ops;
1734 /* br_netfilter.c */
1735 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1736 int br_nf_core_init(void);
1737 void br_nf_core_fini(void);
1738 void br_netfilter_rtable_init(struct net_bridge *);
1740 static inline int br_nf_core_init(void) { return 0; }
1741 static inline void br_nf_core_fini(void) {}
1742 #define br_netfilter_rtable_init(x)
1746 void br_set_state(struct net_bridge_port *p, unsigned int state);
1747 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
1748 void br_init_port(struct net_bridge_port *p);
1749 void br_become_designated_port(struct net_bridge_port *p);
1751 void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
1752 int br_set_forward_delay(struct net_bridge *br, unsigned long x);
1753 int br_set_hello_time(struct net_bridge *br, unsigned long x);
1754 int br_set_max_age(struct net_bridge *br, unsigned long x);
1755 int __set_ageing_time(struct net_device *dev, unsigned long t);
1756 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time);
1760 void br_stp_enable_bridge(struct net_bridge *br);
1761 void br_stp_disable_bridge(struct net_bridge *br);
1762 int br_stp_set_enabled(struct net_bridge *br, unsigned long val,
1763 struct netlink_ext_ack *extack);
1764 void br_stp_enable_port(struct net_bridge_port *p);
1765 void br_stp_disable_port(struct net_bridge_port *p);
1766 bool br_stp_recalculate_bridge_id(struct net_bridge *br);
1767 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
1768 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
1769 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
1770 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
1771 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
1775 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
1776 struct net_device *dev);
1778 /* br_stp_timer.c */
1779 void br_stp_timer_init(struct net_bridge *br);
1780 void br_stp_port_timer_init(struct net_bridge_port *p);
1781 unsigned long br_timer_value(const struct timer_list *timer);
1784 #if IS_ENABLED(CONFIG_ATM_LANE)
1785 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
1789 #if IS_ENABLED(CONFIG_BRIDGE_MRP)
1790 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
1791 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
1792 bool br_mrp_enabled(struct net_bridge *br);
1793 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p);
1794 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br);
1796 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
1797 struct nlattr *attr, int cmd,
1798 struct netlink_ext_ack *extack)
1803 static inline bool br_mrp_enabled(struct net_bridge *br)
1808 static inline void br_mrp_port_del(struct net_bridge *br,
1809 struct net_bridge_port *p)
1813 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br)
1821 #if IS_ENABLED(CONFIG_BRIDGE_CFM)
1822 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
1823 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
1824 bool br_cfm_created(struct net_bridge *br);
1825 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p);
1826 int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br);
1827 int br_cfm_status_fill_info(struct sk_buff *skb,
1828 struct net_bridge *br,
1830 int br_cfm_mep_count(struct net_bridge *br, u32 *count);
1831 int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count);
1833 static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
1834 struct nlattr *attr, int cmd,
1835 struct netlink_ext_ack *extack)
1840 static inline bool br_cfm_created(struct net_bridge *br)
1845 static inline void br_cfm_port_del(struct net_bridge *br,
1846 struct net_bridge_port *p)
1850 static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br)
1855 static inline int br_cfm_status_fill_info(struct sk_buff *skb,
1856 struct net_bridge *br,
1862 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count)
1867 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count)
1874 extern struct rtnl_link_ops br_link_ops;
1875 int br_netlink_init(void);
1876 void br_netlink_fini(void);
1877 void br_ifinfo_notify(int event, const struct net_bridge *br,
1878 const struct net_bridge_port *port);
1879 void br_info_notify(int event, const struct net_bridge *br,
1880 const struct net_bridge_port *port, u32 filter);
1881 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags,
1882 struct netlink_ext_ack *extack);
1883 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
1884 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
1885 u32 filter_mask, int nlflags);
1886 int br_process_vlan_info(struct net_bridge *br,
1887 struct net_bridge_port *p, int cmd,
1888 struct bridge_vlan_info *vinfo_curr,
1889 struct bridge_vlan_info **vinfo_last,
1891 struct netlink_ext_ack *extack);
1895 extern const struct sysfs_ops brport_sysfs_ops;
1896 int br_sysfs_addif(struct net_bridge_port *p);
1897 int br_sysfs_renameif(struct net_bridge_port *p);
1900 int br_sysfs_addbr(struct net_device *dev);
1901 void br_sysfs_delbr(struct net_device *dev);
1905 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
1906 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
1907 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
1908 static inline void br_sysfs_delbr(struct net_device *dev) { return; }
1909 #endif /* CONFIG_SYSFS */
1911 /* br_switchdev.c */
1912 #ifdef CONFIG_NET_SWITCHDEV
1913 int br_switchdev_port_offload(struct net_bridge_port *p,
1914 struct net_device *dev, const void *ctx,
1915 struct notifier_block *atomic_nb,
1916 struct notifier_block *blocking_nb,
1917 bool tx_fwd_offload,
1918 struct netlink_ext_ack *extack);
1920 void br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx,
1921 struct notifier_block *atomic_nb,
1922 struct notifier_block *blocking_nb);
1924 bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb);
1926 void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb);
1928 void nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p,
1929 struct sk_buff *skb);
1930 void nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p,
1931 struct sk_buff *skb);
1932 void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1933 struct sk_buff *skb);
1934 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1935 const struct sk_buff *skb);
1936 int br_switchdev_set_port_flag(struct net_bridge_port *p,
1937 unsigned long flags,
1939 struct netlink_ext_ack *extack);
1940 void br_switchdev_fdb_notify(struct net_bridge *br,
1941 const struct net_bridge_fdb_entry *fdb, int type);
1942 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags,
1943 struct netlink_ext_ack *extack);
1944 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid);
1945 void br_switchdev_init(struct net_bridge *br);
1947 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1949 skb->offload_fwd_mark = 0;
1953 br_switchdev_port_offload(struct net_bridge_port *p,
1954 struct net_device *dev, const void *ctx,
1955 struct notifier_block *atomic_nb,
1956 struct notifier_block *blocking_nb,
1957 bool tx_fwd_offload,
1958 struct netlink_ext_ack *extack)
1964 br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx,
1965 struct notifier_block *atomic_nb,
1966 struct notifier_block *blocking_nb)
1970 static inline bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb)
1975 static inline void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb)
1980 nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p,
1981 struct sk_buff *skb)
1986 nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p,
1987 struct sk_buff *skb)
1991 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1992 struct sk_buff *skb)
1996 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1997 const struct sk_buff *skb)
2002 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p,
2003 unsigned long flags,
2005 struct netlink_ext_ack *extack)
2010 static inline int br_switchdev_port_vlan_add(struct net_device *dev,
2012 struct netlink_ext_ack *extack)
2017 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid)
2023 br_switchdev_fdb_notify(struct net_bridge *br,
2024 const struct net_bridge_fdb_entry *fdb, int type)
2028 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
2032 static inline void br_switchdev_init(struct net_bridge *br)
2036 #endif /* CONFIG_NET_SWITCHDEV */
2038 /* br_arp_nd_proxy.c */
2039 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br);
2040 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br,
2041 u16 vid, struct net_bridge_port *p);
2042 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br,
2043 u16 vid, struct net_bridge_port *p, struct nd_msg *msg);
2044 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m);