| /* |
| * 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 |
| }; |
| |
| #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_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 |
| }; |
| |
| #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 */ |
| void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb); |
| 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, struct sk_buff *skb0); |
| int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); |
| void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast); |
| void br_flood_forward(struct net_bridge *br, struct sk_buff *skb, |
| struct sk_buff *skb2, bool unicast); |
| |
| /* 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_deliver(struct net_bridge_mdb_entry *mdst, |
| struct sk_buff *skb); |
| void br_multicast_forward(struct net_bridge_mdb_entry *mdst, |
| struct sk_buff *skb, struct sk_buff *skb2); |
| 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, |
| __be16 proto, 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_deliver(struct net_bridge_mdb_entry *mdst, |
| struct sk_buff *skb) |
| { |
| } |
| |
| static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst, |
| struct sk_buff *skb, |
| struct sk_buff *skb2) |
| { |
| } |
| 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, |
| __be16 proto, 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, u32 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 */ |
| |
| #endif |