| /* |
| * 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> |
| |
| #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 control protocols like STP and LLDP */ |
| #define BR_GROUPFWD_RESTRICTED 0x4007u |
| |
| /* 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 br_ip |
| { |
| union { |
| __be32 ip4; |
| #if IS_ENABLED(CONFIG_IPV6) |
| struct in6_addr ip6; |
| #endif |
| } u; |
| __be16 proto; |
| }; |
| |
| struct net_bridge_fdb_entry |
| { |
| struct hlist_node hlist; |
| struct net_bridge_port *dst; |
| |
| struct rcu_head rcu; |
| unsigned long updated; |
| unsigned long used; |
| 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 __rcu *next; |
| struct hlist_node mglist; |
| struct rcu_head rcu; |
| struct timer_list timer; |
| struct br_ip addr; |
| }; |
| |
| 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; |
| #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 |
| |
| #ifdef CONFIG_SYSFS |
| char sysfs_name[IFNAMSIZ]; |
| #endif |
| |
| #ifdef CONFIG_NET_POLL_CONTROLLER |
| struct netpoll *np; |
| #endif |
| }; |
| |
| #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) |
| { |
| struct net_bridge_port *port = |
| rcu_dereference_rtnl(dev->rx_handler_data); |
| |
| return br_port_exists(dev) ? port : NULL; |
| } |
| |
| static inline struct net_bridge_port *br_port_get_rtnl(struct net_device *dev) |
| { |
| return br_port_exists(dev) ? |
| rtnl_dereference(dev->rx_handler_data) : NULL; |
| } |
| |
| struct br_cpu_netstats { |
| u64 rx_packets; |
| u64 rx_bytes; |
| u64 tx_packets; |
| u64 tx_bytes; |
| struct u64_stats_sync syncp; |
| }; |
| |
| struct net_bridge |
| { |
| spinlock_t lock; |
| struct list_head port_list; |
| struct net_device *dev; |
| |
| struct br_cpu_netstats __percpu *stats; |
| spinlock_t hash_lock; |
| struct hlist_head hash[BR_HASH_SIZE]; |
| #ifdef CONFIG_BRIDGE_NETFILTER |
| struct rtable fake_rtable; |
| bool nf_call_iptables; |
| bool nf_call_ip6tables; |
| bool nf_call_arptables; |
| #endif |
| unsigned long flags; |
| #define BR_SET_MAC_ADDR 0x00000001 |
| |
| u16 group_fwd_mask; |
| |
| /* 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; |
| u8 multicast_querier: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 __rcu *mdb; |
| struct hlist_head router_list; |
| |
| 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 |
| |
| #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) |
| |
| extern struct notifier_block br_device_notifier; |
| |
| /* 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 void br_dev_delete(struct net_device *dev, struct list_head *list); |
| extern netdev_tx_t br_dev_xmit(struct sk_buff *skb, |
| struct net_device *dev); |
| #ifdef CONFIG_NET_POLL_CONTROLLER |
| static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br) |
| { |
| return br->dev->npinfo; |
| } |
| |
| 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); |
| } |
| |
| extern int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp); |
| extern void br_netpoll_disable(struct net_bridge_port *p); |
| #else |
| static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br) |
| { |
| return NULL; |
| } |
| |
| 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, gfp_t gfp) |
| { |
| return 0; |
| } |
| |
| static inline void br_netpoll_disable(struct net_bridge_port *p) |
| { |
| } |
| #endif |
| |
| /* 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_change_mac_address(struct net_bridge *br, const u8 *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); |
| |
| extern int br_fdb_delete(struct ndmsg *ndm, |
| struct net_device *dev, |
| const unsigned char *addr); |
| extern int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], |
| struct net_device *dev, |
| const unsigned char *addr, |
| u16 nlh_flags); |
| extern int br_fdb_dump(struct sk_buff *skb, |
| struct netlink_callback *cb, |
| struct net_device *dev, |
| int idx); |
| |
| /* 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 netdev_features_t br_features_recompute(struct net_bridge *br, |
| netdev_features_t features); |
| |
| /* br_input.c */ |
| extern int br_handle_frame_finish(struct sk_buff *skb); |
| extern rx_handler_result_t br_handle_frame(struct sk_buff **pskb); |
| |
| /* 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_querier(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); |
| |
| extern int br_set_forward_delay(struct net_bridge *br, unsigned long x); |
| extern int br_set_hello_time(struct net_bridge *br, unsigned long x); |
| extern int br_set_max_age(struct net_bridge *br, unsigned long x); |
| |
| |
| /* 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 bool 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 int br_stp_set_port_priority(struct net_bridge_port *p, |
| unsigned long newprio); |
| extern int br_stp_set_path_cost(struct net_bridge_port *p, |
| unsigned long 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 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; |
| extern int br_netlink_init(void); |
| extern void br_netlink_fini(void); |
| extern void br_ifinfo_notify(int event, struct net_bridge_port *port); |
| extern int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg); |
| extern int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, |
| struct net_device *dev); |
| |
| #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); |
| extern int br_sysfs_renameif(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 |
| |
| 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 |