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- /*
- * Linux ethernet bridge
- *
- * Authors:
- * Lennert Buytenhek <buytenh@gnu.org>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
- #ifndef _BR_PRIVATE_H
- #define _BR_PRIVATE_H
- #include <linux/netdevice.h>
- #include <linux/if_bridge.h>
- #include <linux/netpoll.h>
- #include <linux/u64_stats_sync.h>
- #include <net/route.h>
- #include <net/ip6_fib.h>
- #include <linux/if_vlan.h>
- #include <linux/rhashtable.h>
- #define BR_HASH_BITS 8
- #define BR_HASH_SIZE (1 << BR_HASH_BITS)
- #define BR_HOLD_TIME (1*HZ)
- #define BR_PORT_BITS 10
- #define BR_MAX_PORTS (1<<BR_PORT_BITS)
- #define BR_VERSION "2.3"
- /* Control of forwarding link local multicast */
- #define BR_GROUPFWD_DEFAULT 0
- /* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */
- #define BR_GROUPFWD_RESTRICTED 0x0007u
- /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
- #define BR_GROUPFWD_8021AD 0xB801u
- /* Path to usermode spanning tree program */
- #define BR_STP_PROG "/sbin/bridge-stp"
- typedef struct bridge_id bridge_id;
- typedef struct mac_addr mac_addr;
- typedef __u16 port_id;
- struct bridge_id
- {
- unsigned char prio[2];
- unsigned char addr[ETH_ALEN];
- };
- struct mac_addr
- {
- unsigned char addr[ETH_ALEN];
- };
- #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
- /* our own querier */
- struct bridge_mcast_own_query {
- struct timer_list timer;
- u32 startup_sent;
- };
- /* other querier */
- struct bridge_mcast_other_query {
- struct timer_list timer;
- unsigned long delay_time;
- };
- /* selected querier */
- struct bridge_mcast_querier {
- struct br_ip addr;
- struct net_bridge_port __rcu *port;
- };
- /* IGMP/MLD statistics */
- struct bridge_mcast_stats {
- struct br_mcast_stats mstats;
- struct u64_stats_sync syncp;
- };
- #endif
- struct br_vlan_stats {
- u64 rx_bytes;
- u64 rx_packets;
- u64 tx_bytes;
- u64 tx_packets;
- struct u64_stats_sync syncp;
- };
- /**
- * struct net_bridge_vlan - per-vlan entry
- *
- * @vnode: rhashtable member
- * @vid: VLAN id
- * @flags: bridge vlan flags
- * @stats: per-cpu VLAN statistics
- * @br: if MASTER flag set, this points to a bridge struct
- * @port: if MASTER flag unset, this points to a port struct
- * @refcnt: if MASTER flag set, this is bumped for each port referencing it
- * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
- * for this VLAN entry
- * @vlist: sorted list of VLAN entries
- * @rcu: used for entry destruction
- *
- * This structure is shared between the global per-VLAN entries contained in
- * the bridge rhashtable and the local per-port per-VLAN entries contained in
- * the port's rhashtable. The union entries should be interpreted depending on
- * the entry flags that are set.
- */
- struct net_bridge_vlan {
- struct rhash_head vnode;
- u16 vid;
- u16 flags;
- struct br_vlan_stats __percpu *stats;
- union {
- struct net_bridge *br;
- struct net_bridge_port *port;
- };
- union {
- atomic_t refcnt;
- struct net_bridge_vlan *brvlan;
- };
- struct list_head vlist;
- struct rcu_head rcu;
- };
- /**
- * struct net_bridge_vlan_group
- *
- * @vlan_hash: VLAN entry rhashtable
- * @vlan_list: sorted VLAN entry list
- * @num_vlans: number of total VLAN entries
- * @pvid: PVID VLAN id
- *
- * IMPORTANT: Be careful when checking if there're VLAN entries using list
- * primitives because the bridge can have entries in its list which
- * are just for global context but not for filtering, i.e. they have
- * the master flag set but not the brentry flag. If you have to check
- * if there're "real" entries in the bridge please test @num_vlans
- */
- struct net_bridge_vlan_group {
- struct rhashtable vlan_hash;
- struct list_head vlan_list;
- u16 num_vlans;
- u16 pvid;
- };
- struct net_bridge_fdb_entry
- {
- struct hlist_node hlist;
- struct net_bridge_port *dst;
- unsigned long updated;
- unsigned long used;
- mac_addr addr;
- __u16 vlan_id;
- unsigned char is_local:1,
- is_static:1,
- added_by_user:1,
- added_by_external_learn:1;
- struct rcu_head rcu;
- };
- #define MDB_PG_FLAGS_PERMANENT BIT(0)
- #define MDB_PG_FLAGS_OFFLOAD BIT(1)
- struct net_bridge_port_group {
- struct net_bridge_port *port;
- struct net_bridge_port_group __rcu *next;
- struct hlist_node mglist;
- struct rcu_head rcu;
- struct timer_list timer;
- struct br_ip addr;
- unsigned char flags;
- };
- struct net_bridge_mdb_entry
- {
- struct hlist_node hlist[2];
- struct net_bridge *br;
- struct net_bridge_port_group __rcu *ports;
- struct rcu_head rcu;
- struct timer_list timer;
- struct br_ip addr;
- bool mglist;
- };
- struct net_bridge_mdb_htable
- {
- struct hlist_head *mhash;
- struct rcu_head rcu;
- struct net_bridge_mdb_htable *old;
- u32 size;
- u32 max;
- u32 secret;
- u32 ver;
- };
- struct net_bridge_port
- {
- struct net_bridge *br;
- struct net_device *dev;
- struct list_head list;
- /* STP */
- u8 priority;
- u8 state;
- u16 port_no;
- unsigned char topology_change_ack;
- unsigned char config_pending;
- port_id port_id;
- port_id designated_port;
- bridge_id designated_root;
- bridge_id designated_bridge;
- u32 path_cost;
- u32 designated_cost;
- unsigned long designated_age;
- struct timer_list forward_delay_timer;
- struct timer_list hold_timer;
- struct timer_list message_age_timer;
- struct kobject kobj;
- struct rcu_head rcu;
- unsigned long flags;
- #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
- struct bridge_mcast_own_query ip4_own_query;
- #if IS_ENABLED(CONFIG_IPV6)
- struct bridge_mcast_own_query ip6_own_query;
- #endif /* IS_ENABLED(CONFIG_IPV6) */
- unsigned char multicast_router;
- struct bridge_mcast_stats __percpu *mcast_stats;
- struct timer_list multicast_router_timer;
- struct hlist_head mglist;
- struct hlist_node rlist;
- #endif
- #ifdef CONFIG_SYSFS
- char sysfs_name[IFNAMSIZ];
- #endif
- #ifdef CONFIG_NET_POLL_CONTROLLER
- struct netpoll *np;
- #endif
- #ifdef CONFIG_BRIDGE_VLAN_FILTERING
- struct net_bridge_vlan_group __rcu *vlgrp;
- #endif
- #ifdef CONFIG_NET_SWITCHDEV
- int offload_fwd_mark;
- #endif
- };
- #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
- #define br_promisc_port(p) ((p)->flags & BR_PROMISC)
- #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
- static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
- {
- return rcu_dereference(dev->rx_handler_data);
- }
- static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
- {
- return br_port_exists(dev) ?
- rtnl_dereference(dev->rx_handler_data) : NULL;
- }
- struct net_bridge
- {
- spinlock_t lock;
- struct list_head port_list;
- struct net_device *dev;
- struct pcpu_sw_netstats __percpu *stats;
- spinlock_t hash_lock;
- struct hlist_head hash[BR_HASH_SIZE];
- #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
- union {
- struct rtable fake_rtable;
- struct rt6_info fake_rt6_info;
- };
- bool nf_call_iptables;
- bool nf_call_ip6tables;
- bool nf_call_arptables;
- #endif
- u16 group_fwd_mask;
- u16 group_fwd_mask_required;
- /* STP */
- bridge_id designated_root;
- bridge_id bridge_id;
- u32 root_path_cost;
- unsigned long max_age;
- unsigned long hello_time;
- unsigned long forward_delay;
- unsigned long bridge_max_age;
- unsigned long ageing_time;
- unsigned long bridge_hello_time;
- unsigned long bridge_forward_delay;
- u8 group_addr[ETH_ALEN];
- bool group_addr_set;
- u16 root_port;
- enum {
- BR_NO_STP, /* no spanning tree */
- BR_KERNEL_STP, /* old STP in kernel */
- BR_USER_STP, /* new RSTP in userspace */
- } stp_enabled;
- unsigned char topology_change;
- unsigned char topology_change_detected;
- #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
- unsigned char multicast_router;
- u8 multicast_disabled:1;
- u8 multicast_querier:1;
- u8 multicast_query_use_ifaddr:1;
- u8 has_ipv6_addr:1;
- u8 multicast_stats_enabled:1;
- u32 hash_elasticity;
- u32 hash_max;
- u32 multicast_last_member_count;
- u32 multicast_startup_query_count;
- unsigned long multicast_last_member_interval;
- unsigned long multicast_membership_interval;
- unsigned long multicast_querier_interval;
- unsigned long multicast_query_interval;
- unsigned long multicast_query_response_interval;
- unsigned long multicast_startup_query_interval;
- spinlock_t multicast_lock;
- struct net_bridge_mdb_htable __rcu *mdb;
- struct hlist_head router_list;
- struct timer_list multicast_router_timer;
- struct bridge_mcast_other_query ip4_other_query;
- struct bridge_mcast_own_query ip4_own_query;
- struct bridge_mcast_querier ip4_querier;
- struct bridge_mcast_stats __percpu *mcast_stats;
- #if IS_ENABLED(CONFIG_IPV6)
- struct bridge_mcast_other_query ip6_other_query;
- struct bridge_mcast_own_query ip6_own_query;
- struct bridge_mcast_querier ip6_querier;
- #endif /* IS_ENABLED(CONFIG_IPV6) */
- #endif
- struct timer_list hello_timer;
- struct timer_list tcn_timer;
- struct timer_list topology_change_timer;
- struct timer_list gc_timer;
- struct kobject *ifobj;
- u32 auto_cnt;
- #ifdef CONFIG_NET_SWITCHDEV
- int offload_fwd_mark;
- #endif
- #ifdef CONFIG_BRIDGE_VLAN_FILTERING
- struct net_bridge_vlan_group __rcu *vlgrp;
- u8 vlan_enabled;
- u8 vlan_stats_enabled;
- __be16 vlan_proto;
- u16 default_pvid;
- #endif
- };
- struct br_input_skb_cb {
- struct net_device *brdev;
- #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
- int igmp;
- int mrouters_only;
- #endif
- bool proxyarp_replied;
- #ifdef CONFIG_BRIDGE_VLAN_FILTERING
- bool vlan_filtered;
- #endif
- #ifdef CONFIG_NET_SWITCHDEV
- int offload_fwd_mark;
- #endif
- };
- #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
- #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
- # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
- #else
- # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
- #endif
- #define br_printk(level, br, format, args...) \
- printk(level "%s: " format, (br)->dev->name, ##args)
- #define br_err(__br, format, args...) \
- br_printk(KERN_ERR, __br, format, ##args)
- #define br_warn(__br, format, args...) \
- br_printk(KERN_WARNING, __br, format, ##args)
- #define br_notice(__br, format, args...) \
- br_printk(KERN_NOTICE, __br, format, ##args)
- #define br_info(__br, format, args...) \
- br_printk(KERN_INFO, __br, format, ##args)
- #define br_debug(br, format, args...) \
- pr_debug("%s: " format, (br)->dev->name, ##args)
- /* called under bridge lock */
- static inline int br_is_root_bridge(const struct net_bridge *br)
- {
- return !memcmp(&br->bridge_id, &br->designated_root, 8);
- }
- /* check if a VLAN entry is global */
- static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
- {
- return v->flags & BRIDGE_VLAN_INFO_MASTER;
- }
- /* check if a VLAN entry is used by the bridge */
- static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
- {
- return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
- }
- /* check if we should use the vlan entry, returns false if it's only context */
- static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
- {
- if (br_vlan_is_master(v)) {
- if (br_vlan_is_brentry(v))
- return true;
- else
- return false;
- }
- return true;
- }
- /* br_device.c */
- void br_dev_setup(struct net_device *dev);
- void br_dev_delete(struct net_device *dev, struct list_head *list);
- netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
- #ifdef CONFIG_NET_POLL_CONTROLLER
- static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
- struct sk_buff *skb)
- {
- struct netpoll *np = p->np;
- if (np)
- netpoll_send_skb(np, skb);
- }
- int br_netpoll_enable(struct net_bridge_port *p);
- void br_netpoll_disable(struct net_bridge_port *p);
- #else
- static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
- struct sk_buff *skb)
- {
- }
- static inline int br_netpoll_enable(struct net_bridge_port *p)
- {
- return 0;
- }
- static inline void br_netpoll_disable(struct net_bridge_port *p)
- {
- }
- #endif
- /* br_fdb.c */
- int br_fdb_init(void);
- void br_fdb_fini(void);
- void br_fdb_flush(struct net_bridge *br);
- void br_fdb_find_delete_local(struct net_bridge *br,
- const struct net_bridge_port *p,
- const unsigned char *addr, u16 vid);
- void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
- void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
- void br_fdb_cleanup(unsigned long arg);
- void br_fdb_delete_by_port(struct net_bridge *br,
- const struct net_bridge_port *p, u16 vid, int do_all);
- struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
- const unsigned char *addr, __u16 vid);
- int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
- int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
- unsigned long off);
- int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
- const unsigned char *addr, u16 vid);
- void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
- const unsigned char *addr, u16 vid, bool added_by_user);
- int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
- struct net_device *dev, const unsigned char *addr, u16 vid);
- int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
- const unsigned char *addr, u16 vid, u16 nlh_flags);
- int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
- struct net_device *dev, struct net_device *fdev, int *idx);
- int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
- void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
- int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
- const unsigned char *addr, u16 vid);
- int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
- const unsigned char *addr, u16 vid);
- /* br_forward.c */
- enum br_pkt_type {
- BR_PKT_UNICAST,
- BR_PKT_MULTICAST,
- BR_PKT_BROADCAST
- };
- int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
- void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
- bool local_rcv, bool local_orig);
- int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
- void br_flood(struct net_bridge *br, struct sk_buff *skb,
- enum br_pkt_type pkt_type, bool local_rcv, bool local_orig);
- /* br_if.c */
- void br_port_carrier_check(struct net_bridge_port *p);
- int br_add_bridge(struct net *net, const char *name);
- int br_del_bridge(struct net *net, const char *name);
- int br_add_if(struct net_bridge *br, struct net_device *dev);
- int br_del_if(struct net_bridge *br, struct net_device *dev);
- int br_min_mtu(const struct net_bridge *br);
- netdev_features_t br_features_recompute(struct net_bridge *br,
- netdev_features_t features);
- void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
- void br_manage_promisc(struct net_bridge *br);
- /* br_input.c */
- int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
- rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
- static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
- {
- return rcu_dereference(dev->rx_handler) == br_handle_frame;
- }
- static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
- {
- return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
- }
- /* br_ioctl.c */
- int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
- int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
- void __user *arg);
- /* br_multicast.c */
- #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
- extern unsigned int br_mdb_rehash_seq;
- int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
- struct sk_buff *skb, u16 vid);
- struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
- struct sk_buff *skb, u16 vid);
- int br_multicast_add_port(struct net_bridge_port *port);
- void br_multicast_del_port(struct net_bridge_port *port);
- void br_multicast_enable_port(struct net_bridge_port *port);
- void br_multicast_disable_port(struct net_bridge_port *port);
- void br_multicast_init(struct net_bridge *br);
- void br_multicast_open(struct net_bridge *br);
- void br_multicast_stop(struct net_bridge *br);
- void br_multicast_dev_del(struct net_bridge *br);
- void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
- struct sk_buff *skb, bool local_rcv, bool local_orig);
- int br_multicast_set_router(struct net_bridge *br, unsigned long val);
- int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
- int br_multicast_toggle(struct net_bridge *br, unsigned long val);
- int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
- int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
- struct net_bridge_mdb_entry *
- br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst);
- struct net_bridge_mdb_entry *
- br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port,
- struct br_ip *group);
- void br_multicast_free_pg(struct rcu_head *head);
- struct net_bridge_port_group *
- br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
- struct net_bridge_port_group __rcu *next,
- unsigned char flags);
- void br_mdb_init(void);
- void br_mdb_uninit(void);
- void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
- struct br_ip *group, int type, u8 flags);
- void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
- int type);
- void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p,
- const struct sk_buff *skb, u8 type, u8 dir);
- int br_multicast_init_stats(struct net_bridge *br);
- void br_multicast_get_stats(const struct net_bridge *br,
- const struct net_bridge_port *p,
- struct br_mcast_stats *dest);
- #define mlock_dereference(X, br) \
- rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
- static inline bool br_multicast_is_router(struct net_bridge *br)
- {
- return br->multicast_router == 2 ||
- (br->multicast_router == 1 &&
- timer_pending(&br->multicast_router_timer));
- }
- static inline bool
- __br_multicast_querier_exists(struct net_bridge *br,
- struct bridge_mcast_other_query *querier,
- const bool is_ipv6)
- {
- bool own_querier_enabled;
- if (br->multicast_querier) {
- if (is_ipv6 && !br->has_ipv6_addr)
- own_querier_enabled = false;
- else
- own_querier_enabled = true;
- } else {
- own_querier_enabled = false;
- }
- return time_is_before_jiffies(querier->delay_time) &&
- (own_querier_enabled || timer_pending(&querier->timer));
- }
- static inline bool br_multicast_querier_exists(struct net_bridge *br,
- struct ethhdr *eth)
- {
- switch (eth->h_proto) {
- case (htons(ETH_P_IP)):
- return __br_multicast_querier_exists(br,
- &br->ip4_other_query, false);
- #if IS_ENABLED(CONFIG_IPV6)
- case (htons(ETH_P_IPV6)):
- return __br_multicast_querier_exists(br,
- &br->ip6_other_query, true);
- #endif
- default:
- return false;
- }
- }
- static inline int br_multicast_igmp_type(const struct sk_buff *skb)
- {
- return BR_INPUT_SKB_CB(skb)->igmp;
- }
- #else
- static inline int br_multicast_rcv(struct net_bridge *br,
- struct net_bridge_port *port,
- struct sk_buff *skb,
- u16 vid)
- {
- return 0;
- }
- static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
- struct sk_buff *skb, u16 vid)
- {
- return NULL;
- }
- static inline int br_multicast_add_port(struct net_bridge_port *port)
- {
- return 0;
- }
- static inline void br_multicast_del_port(struct net_bridge_port *port)
- {
- }
- static inline void br_multicast_enable_port(struct net_bridge_port *port)
- {
- }
- static inline void br_multicast_disable_port(struct net_bridge_port *port)
- {
- }
- static inline void br_multicast_init(struct net_bridge *br)
- {
- }
- static inline void br_multicast_open(struct net_bridge *br)
- {
- }
- static inline void br_multicast_stop(struct net_bridge *br)
- {
- }
- static inline void br_multicast_dev_del(struct net_bridge *br)
- {
- }
- static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
- struct sk_buff *skb,
- bool local_rcv, bool local_orig)
- {
- }
- static inline bool br_multicast_is_router(struct net_bridge *br)
- {
- return 0;
- }
- static inline bool br_multicast_querier_exists(struct net_bridge *br,
- struct ethhdr *eth)
- {
- return false;
- }
- static inline void br_mdb_init(void)
- {
- }
- static inline void br_mdb_uninit(void)
- {
- }
- static inline void br_multicast_count(struct net_bridge *br,
- const struct net_bridge_port *p,
- const struct sk_buff *skb,
- u8 type, u8 dir)
- {
- }
- static inline int br_multicast_init_stats(struct net_bridge *br)
- {
- return 0;
- }
- static inline int br_multicast_igmp_type(const struct sk_buff *skb)
- {
- return 0;
- }
- #endif
- /* br_vlan.c */
- #ifdef CONFIG_BRIDGE_VLAN_FILTERING
- bool br_allowed_ingress(const struct net_bridge *br,
- struct net_bridge_vlan_group *vg, struct sk_buff *skb,
- u16 *vid);
- bool br_allowed_egress(struct net_bridge_vlan_group *vg,
- const struct sk_buff *skb);
- bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
- struct sk_buff *br_handle_vlan(struct net_bridge *br,
- struct net_bridge_vlan_group *vg,
- struct sk_buff *skb);
- int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags);
- int br_vlan_delete(struct net_bridge *br, u16 vid);
- void br_vlan_flush(struct net_bridge *br);
- struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
- void br_recalculate_fwd_mask(struct net_bridge *br);
- int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
- int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
- int __br_vlan_set_proto(struct net_bridge *br, __be16 proto);
- int br_vlan_set_proto(struct net_bridge *br, unsigned long val);
- int br_vlan_set_stats(struct net_bridge *br, unsigned long val);
- int br_vlan_init(struct net_bridge *br);
- int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val);
- int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid);
- int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags);
- int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
- void nbp_vlan_flush(struct net_bridge_port *port);
- int nbp_vlan_init(struct net_bridge_port *port);
- int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
- void br_vlan_get_stats(const struct net_bridge_vlan *v,
- struct br_vlan_stats *stats);
- static inline struct net_bridge_vlan_group *br_vlan_group(
- const struct net_bridge *br)
- {
- return rtnl_dereference(br->vlgrp);
- }
- static inline struct net_bridge_vlan_group *nbp_vlan_group(
- const struct net_bridge_port *p)
- {
- return rtnl_dereference(p->vlgrp);
- }
- static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
- const struct net_bridge *br)
- {
- return rcu_dereference(br->vlgrp);
- }
- static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
- const struct net_bridge_port *p)
- {
- return rcu_dereference(p->vlgrp);
- }
- /* Since bridge now depends on 8021Q module, but the time bridge sees the
- * skb, the vlan tag will always be present if the frame was tagged.
- */
- static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
- {
- int err = 0;
- if (skb_vlan_tag_present(skb)) {
- *vid = skb_vlan_tag_get(skb) & VLAN_VID_MASK;
- } else {
- *vid = 0;
- err = -EINVAL;
- }
- return err;
- }
- static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
- {
- if (!vg)
- return 0;
- smp_rmb();
- return vg->pvid;
- }
- static inline int br_vlan_enabled(struct net_bridge *br)
- {
- return br->vlan_enabled;
- }
- #else
- static inline bool br_allowed_ingress(const struct net_bridge *br,
- struct net_bridge_vlan_group *vg,
- struct sk_buff *skb,
- u16 *vid)
- {
- return true;
- }
- static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
- const struct sk_buff *skb)
- {
- return true;
- }
- static inline bool br_should_learn(struct net_bridge_port *p,
- struct sk_buff *skb, u16 *vid)
- {
- return true;
- }
- static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
- struct net_bridge_vlan_group *vg,
- struct sk_buff *skb)
- {
- return skb;
- }
- static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags)
- {
- return -EOPNOTSUPP;
- }
- static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
- {
- return -EOPNOTSUPP;
- }
- static inline void br_vlan_flush(struct net_bridge *br)
- {
- }
- static inline void br_recalculate_fwd_mask(struct net_bridge *br)
- {
- }
- static inline int br_vlan_init(struct net_bridge *br)
- {
- return 0;
- }
- static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags)
- {
- return -EOPNOTSUPP;
- }
- static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
- {
- return -EOPNOTSUPP;
- }
- static inline void nbp_vlan_flush(struct net_bridge_port *port)
- {
- }
- static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
- u16 vid)
- {
- return NULL;
- }
- static inline int nbp_vlan_init(struct net_bridge_port *port)
- {
- return 0;
- }
- static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
- {
- return 0;
- }
- static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
- {
- return 0;
- }
- static inline int br_vlan_enabled(struct net_bridge *br)
- {
- return 0;
- }
- static inline int __br_vlan_filter_toggle(struct net_bridge *br,
- unsigned long val)
- {
- return -EOPNOTSUPP;
- }
- static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
- u32 filter_mask)
- {
- return 0;
- }
- static inline struct net_bridge_vlan_group *br_vlan_group(
- const struct net_bridge *br)
- {
- return NULL;
- }
- static inline struct net_bridge_vlan_group *nbp_vlan_group(
- const struct net_bridge_port *p)
- {
- return NULL;
- }
- static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
- const struct net_bridge *br)
- {
- return NULL;
- }
- static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
- const struct net_bridge_port *p)
- {
- return NULL;
- }
- static inline void br_vlan_get_stats(const struct net_bridge_vlan *v,
- struct br_vlan_stats *stats)
- {
- }
- #endif
- struct nf_br_ops {
- int (*br_dev_xmit_hook)(struct sk_buff *skb);
- };
- extern const struct nf_br_ops __rcu *nf_br_ops;
- /* br_netfilter.c */
- #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
- int br_nf_core_init(void);
- void br_nf_core_fini(void);
- void br_netfilter_rtable_init(struct net_bridge *);
- #else
- static inline int br_nf_core_init(void) { return 0; }
- static inline void br_nf_core_fini(void) {}
- #define br_netfilter_rtable_init(x)
- #endif
- /* br_stp.c */
- void br_set_state(struct net_bridge_port *p, unsigned int state);
- struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
- void br_init_port(struct net_bridge_port *p);
- void br_become_designated_port(struct net_bridge_port *p);
- void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
- int br_set_forward_delay(struct net_bridge *br, unsigned long x);
- int br_set_hello_time(struct net_bridge *br, unsigned long x);
- int br_set_max_age(struct net_bridge *br, unsigned long x);
- int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time);
- /* br_stp_if.c */
- void br_stp_enable_bridge(struct net_bridge *br);
- void br_stp_disable_bridge(struct net_bridge *br);
- void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
- void br_stp_enable_port(struct net_bridge_port *p);
- void br_stp_disable_port(struct net_bridge_port *p);
- bool br_stp_recalculate_bridge_id(struct net_bridge *br);
- void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
- void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
- int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
- int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
- ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
- /* br_stp_bpdu.c */
- struct stp_proto;
- void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
- struct net_device *dev);
- /* br_stp_timer.c */
- void br_stp_timer_init(struct net_bridge *br);
- void br_stp_port_timer_init(struct net_bridge_port *p);
- unsigned long br_timer_value(const struct timer_list *timer);
- /* br.c */
- #if IS_ENABLED(CONFIG_ATM_LANE)
- extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
- #endif
- /* br_netlink.c */
- extern struct rtnl_link_ops br_link_ops;
- int br_netlink_init(void);
- void br_netlink_fini(void);
- void br_ifinfo_notify(int event, struct net_bridge_port *port);
- int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
- int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
- int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
- u32 filter_mask, int nlflags);
- #ifdef CONFIG_SYSFS
- /* br_sysfs_if.c */
- extern const struct sysfs_ops brport_sysfs_ops;
- int br_sysfs_addif(struct net_bridge_port *p);
- int br_sysfs_renameif(struct net_bridge_port *p);
- /* br_sysfs_br.c */
- int br_sysfs_addbr(struct net_device *dev);
- void br_sysfs_delbr(struct net_device *dev);
- #else
- static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
- static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
- static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
- static inline void br_sysfs_delbr(struct net_device *dev) { return; }
- #endif /* CONFIG_SYSFS */
- /* br_switchdev.c */
- #ifdef CONFIG_NET_SWITCHDEV
- int nbp_switchdev_mark_set(struct net_bridge_port *p);
- void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
- struct sk_buff *skb);
- bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
- const struct sk_buff *skb);
- #else
- static inline int nbp_switchdev_mark_set(struct net_bridge_port *p)
- {
- return 0;
- }
- static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
- struct sk_buff *skb)
- {
- }
- static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
- const struct sk_buff *skb)
- {
- return true;
- }
- #endif /* CONFIG_NET_SWITCHDEV */
- #endif
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