From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- net/bridge/br_private.h | 851 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 851 insertions(+) create mode 100644 net/bridge/br_private.h (limited to 'net/bridge/br_private.h') diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h new file mode 100644 index 000000000..3362c2940 --- /dev/null +++ b/net/bridge/br_private.h @@ -0,0 +1,851 @@ +/* + * Linux ethernet bridge + * + * Authors: + * Lennert Buytenhek + * + * 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 +#include +#include +#include +#include +#include + +#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<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) + struct rtable fake_rtable; + 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; + + 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; +#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 + u8 vlan_enabled; + __be16 vlan_proto; + u16 default_pvid; + struct net_port_vlans __rcu *vlan_info; +#endif +}; + +struct br_input_skb_cb { + struct net_device *brdev; + +#ifdef CONFIG_BRIDGE_IGMP_SNOOPING + int igmp; + int mrouters_only; +#endif + + u16 frag_max_size; + 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); +} + +/* 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, 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 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 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 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); +void 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_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 state); +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); + +#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) +{ + return time_is_before_jiffies(querier->delay_time) && + (br->multicast_querier || 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); +#if IS_ENABLED(CONFIG_IPV6) + case (htons(ETH_P_IPV6)): + return __br_multicast_querier_exists(br, &br->ip6_other_query); +#endif + default: + return false; + } +} +#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 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; +} +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) +{ +} +#endif + +/* br_vlan.c */ +#ifdef CONFIG_BRIDGE_VLAN_FILTERING +bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, + struct sk_buff *skb, u16 *vid); +bool br_allowed_egress(struct net_bridge *br, const struct net_port_vlans *v, + 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, + const struct net_port_vlans *v, + 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); +bool br_vlan_find(struct net_bridge *br, 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_set_proto(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 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); +bool nbp_vlan_find(struct net_bridge_port *port, u16 vid); +int nbp_vlan_init(struct net_bridge_port *port); + +static inline struct net_port_vlans *br_get_vlan_info( + const struct net_bridge *br) +{ + return rcu_dereference_rtnl(br->vlan_info); +} + +static inline struct net_port_vlans *nbp_get_vlan_info( + const struct net_bridge_port *p) +{ + return rcu_dereference_rtnl(p->vlan_info); +} + +/* 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_port_vlans *v) +{ + if (!v) + return 0; + + smp_rmb(); + return v->pvid; +} + +static inline int br_vlan_enabled(struct net_bridge *br) +{ + return br->vlan_enabled; +} +#else +static inline bool br_allowed_ingress(struct net_bridge *br, + struct net_port_vlans *v, + struct sk_buff *skb, + u16 *vid) +{ + return true; +} + +static inline bool br_allowed_egress(struct net_bridge *br, + const struct net_port_vlans *v, + 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, + const struct net_port_vlans *v, + 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 bool br_vlan_find(struct net_bridge *br, u16 vid) +{ + return false; +} + +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_port_vlans *br_get_vlan_info( + const struct net_bridge *br) +{ + return NULL; +} +static inline struct net_port_vlans *nbp_get_vlan_info( + const struct net_bridge_port *p) +{ + return NULL; +} + +static inline bool nbp_vlan_find(struct net_bridge_port *port, u16 vid) +{ + return false; +} + +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_port_vlans *v) +{ + return 0; +} + +static inline int br_vlan_enabled(struct net_bridge *br) +{ + return 0; +} +#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_log_state(const struct net_bridge_port *p); +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); + + +/* 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 -- cgit v1.2.3-54-g00ecf