/* * 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 <net/route.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" /* 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[6]; }; struct mac_addr { unsigned char addr[6]; }; struct net_bridge_fdb_entry { struct hlist_node hlist; struct net_bridge_port *dst; struct rcu_head rcu; unsigned long ageing_timer; mac_addr addr; unsigned char is_local; unsigned char is_static; }; struct net_bridge_port_group { struct net_bridge_port *port; struct net_bridge_port_group *next; struct hlist_node mglist; struct rcu_head rcu; struct timer_list timer; struct timer_list query_timer; __be32 addr; u32 queries_sent; }; struct net_bridge_mdb_entry { struct hlist_node hlist[2]; struct hlist_node mglist; struct net_bridge *br; struct net_bridge_port_group *ports; struct rcu_head rcu; struct timer_list timer; struct timer_list query_timer; __be32 addr; u32 queries_sent; }; 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; 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; #define BR_HAIRPIN_MODE 0x00000001 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING u32 multicast_startup_queries_sent; unsigned char multicast_router; struct timer_list multicast_router_timer; struct timer_list multicast_query_timer; struct hlist_head mglist; struct hlist_node rlist; #endif }; struct net_bridge { spinlock_t lock; struct list_head port_list; struct net_device *dev; spinlock_t hash_lock; struct hlist_head hash[BR_HASH_SIZE]; unsigned long feature_mask; #ifdef CONFIG_BRIDGE_NETFILTER struct rtable fake_rtable; #endif unsigned long flags; #define BR_SET_MAC_ADDR 0x00000001 /* 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]; 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; u32 hash_elasticity; u32 hash_max; u32 multicast_last_member_count; u32 multicast_startup_queries_sent; 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 *mdb; struct hlist_head router_list; struct hlist_head mglist; struct timer_list multicast_router_timer; struct timer_list multicast_querier_timer; struct timer_list multicast_query_timer; #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; }; struct br_input_skb_cb { struct net_device *brdev; #ifdef CONFIG_BRIDGE_IGMP_SNOOPING int igmp; int mrouters_only; #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 extern struct notifier_block br_device_notifier; extern const u8 br_group_address[ETH_ALEN]; /* 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); } /* br_device.c */ extern void br_dev_setup(struct net_device *dev); extern netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); /* br_fdb.c */ extern int br_fdb_init(void); extern void br_fdb_fini(void); extern void br_fdb_flush(struct net_bridge *br); extern void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); extern void br_fdb_cleanup(unsigned long arg); extern void br_fdb_delete_by_port(struct net_bridge *br, const struct net_bridge_port *p, int do_all); extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, const unsigned char *addr); extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); extern int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, unsigned long off); extern int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, const unsigned char *addr); extern void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, const unsigned char *addr); /* br_forward.c */ extern void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb); extern int br_dev_queue_push_xmit(struct sk_buff *skb); extern void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, struct sk_buff *skb0); extern int br_forward_finish(struct sk_buff *skb); extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb); extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb, struct sk_buff *skb2); /* br_if.c */ extern void br_port_carrier_check(struct net_bridge_port *p); extern int br_add_bridge(struct net *net, const char *name); extern int br_del_bridge(struct net *net, const char *name); extern void br_net_exit(struct net *net); extern int br_add_if(struct net_bridge *br, struct net_device *dev); extern int br_del_if(struct net_bridge *br, struct net_device *dev); extern int br_min_mtu(const struct net_bridge *br); extern void br_features_recompute(struct net_bridge *br); /* br_input.c */ extern int br_handle_frame_finish(struct sk_buff *skb); extern struct sk_buff *br_handle_frame(struct net_bridge_port *p, struct sk_buff *skb); /* br_ioctl.c */ extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg); /* br_multicast.c */ #ifdef CONFIG_BRIDGE_IGMP_SNOOPING extern int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, struct sk_buff *skb); extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, struct sk_buff *skb); extern void br_multicast_add_port(struct net_bridge_port *port); extern void br_multicast_del_port(struct net_bridge_port *port); extern void br_multicast_enable_port(struct net_bridge_port *port); extern void br_multicast_disable_port(struct net_bridge_port *port); extern void br_multicast_init(struct net_bridge *br); extern void br_multicast_open(struct net_bridge *br); extern void br_multicast_stop(struct net_bridge *br); extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, struct sk_buff *skb); extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst, struct sk_buff *skb, struct sk_buff *skb2); extern int br_multicast_set_router(struct net_bridge *br, unsigned long val); extern int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); extern int br_multicast_toggle(struct net_bridge *br, unsigned long val); extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 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)); } #else static inline int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, struct sk_buff *skb) { return 0; } static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, struct sk_buff *skb) { return NULL; } static inline void br_multicast_add_port(struct net_bridge_port *port) { } 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_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; } #endif /* br_netfilter.c */ #ifdef CONFIG_BRIDGE_NETFILTER extern int br_netfilter_init(void); extern void br_netfilter_fini(void); extern void br_netfilter_rtable_init(struct net_bridge *); #else #define br_netfilter_init() (0) #define br_netfilter_fini() do { } while(0) #define br_netfilter_rtable_init(x) #endif /* br_stp.c */ extern void br_log_state(const struct net_bridge_port *p); extern struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); extern void br_init_port(struct net_bridge_port *p); extern void br_become_designated_port(struct net_bridge_port *p); /* br_stp_if.c */ extern void br_stp_enable_bridge(struct net_bridge *br); extern void br_stp_disable_bridge(struct net_bridge *br); extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val); extern void br_stp_enable_port(struct net_bridge_port *p); extern void br_stp_disable_port(struct net_bridge_port *p); extern void br_stp_recalculate_bridge_id(struct net_bridge *br); extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); extern void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); extern void br_stp_set_port_priority(struct net_bridge_port *p, u8 newprio); extern void br_stp_set_path_cost(struct net_bridge_port *p, u32 path_cost); extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); /* br_stp_bpdu.c */ struct stp_proto; extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, struct net_device *dev); /* br_stp_timer.c */ extern void br_stp_timer_init(struct net_bridge *br); extern void br_stp_port_timer_init(struct net_bridge_port *p); extern unsigned long br_timer_value(const struct timer_list *timer); /* br.c */ #if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE) extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); #endif /* br_netlink.c */ extern int br_netlink_init(void); extern void br_netlink_fini(void); extern void br_ifinfo_notify(int event, struct net_bridge_port *port); #ifdef CONFIG_SYSFS /* br_sysfs_if.c */ extern const struct sysfs_ops brport_sysfs_ops; extern int br_sysfs_addif(struct net_bridge_port *p); /* br_sysfs_br.c */ extern int br_sysfs_addbr(struct net_device *dev); extern void br_sysfs_delbr(struct net_device *dev); #else #define br_sysfs_addif(p) (0) #define br_sysfs_addbr(dev) (0) #define br_sysfs_delbr(dev) do { } while(0) #endif /* CONFIG_SYSFS */ #endif