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Diffstat (limited to '')
| -rw-r--r-- | net/bridge/br_private.h | 1206 |
1 files changed, 1206 insertions, 0 deletions
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h new file mode 100644 index 000000000..7ca3b4692 --- /dev/null +++ b/net/bridge/br_private.h @@ -0,0 +1,1206 @@ +/* + * 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> +#include <linux/refcount.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 */ +enum { + BR_GROUPFWD_STP = BIT(0), + BR_GROUPFWD_MACPAUSE = BIT(1), + BR_GROUPFWD_LACP = BIT(2), +}; + +#define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \ + BR_GROUPFWD_LACP) +/* 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 br_tunnel_info { + __be64 tunnel_id; + struct metadata_dst __rcu *tunnel_dst; +}; + +/** + * 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; + struct rhash_head tnode; + u16 vid; + u16 flags; + struct br_vlan_stats __percpu *stats; + union { + struct net_bridge *br; + struct net_bridge_port *port; + }; + union { + refcount_t refcnt; + struct net_bridge_vlan *brvlan; + }; + + struct br_tunnel_info tinfo; + + 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 rhashtable tunnel_hash; + struct list_head vlan_list; + u16 num_vlans; + u16 pvid; +}; + +struct net_bridge_fdb_key { + mac_addr addr; + u16 vlan_id; +}; + +struct net_bridge_fdb_entry { + struct rhash_head rhnode; + struct net_bridge_port *dst; + + struct net_bridge_fdb_key key; + struct hlist_node fdb_node; + unsigned char is_local:1, + is_static:1, + added_by_user:1, + added_by_external_learn:1, + offloaded:1; + + /* write-heavy members should not affect lookups */ + unsigned long updated ____cacheline_aligned_in_smp; + unsigned long used; + + 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 eth_addr[ETH_ALEN] __aligned(2); + 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 host_joined; +}; + +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; + + unsigned long flags; +#ifdef CONFIG_BRIDGE_VLAN_FILTERING + struct net_bridge_vlan_group __rcu *vlgrp; +#endif + struct net_bridge_port __rcu *backup_port; + + /* 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; + +#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_NET_SWITCHDEV + int offload_fwd_mark; +#endif + u16 group_fwd_mask; + u16 backup_redirected_cnt; +}; + +#define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj) + +#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; +} + +static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev) +{ + return br_port_exists(dev) ? + rcu_dereference_rtnl(dev->rx_handler_data) : NULL; +} + +struct net_bridge { + spinlock_t lock; + spinlock_t hash_lock; + struct list_head port_list; + struct net_device *dev; + struct pcpu_sw_netstats __percpu *stats; + /* These fields are accessed on each packet */ +#ifdef CONFIG_BRIDGE_VLAN_FILTERING + u8 vlan_enabled; + u8 vlan_stats_enabled; + __be16 vlan_proto; + u16 default_pvid; + struct net_bridge_vlan_group __rcu *vlgrp; +#endif + + struct rhashtable fdb_hash_tbl; +#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 char topology_change; + unsigned char topology_change_detected; + u16 root_port; + unsigned long max_age; + unsigned long hello_time; + unsigned long forward_delay; + unsigned long ageing_time; + unsigned long bridge_max_age; + unsigned long bridge_hello_time; + unsigned long bridge_forward_delay; + unsigned long bridge_ageing_time; + + u8 group_addr[ETH_ALEN]; + bool group_addr_set; + + enum { + BR_NO_STP, /* no spanning tree */ + BR_KERNEL_STP, /* old STP in kernel */ + BR_USER_STP, /* new RSTP in userspace */ + } stp_enabled; + +#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; + + u8 multicast_igmp_version; + + 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; + u8 multicast_mld_version; +#endif /* IS_ENABLED(CONFIG_IPV6) */ +#endif + + struct timer_list hello_timer; + struct timer_list tcn_timer; + struct timer_list topology_change_timer; + struct delayed_work gc_work; + struct kobject *ifobj; + u32 auto_cnt; + +#ifdef CONFIG_NET_SWITCHDEV + int offload_fwd_mark; +#endif + bool neigh_suppress_enabled; + bool mtu_set_by_user; + struct hlist_head fdb_list; +}; + +struct br_input_skb_cb { + struct net_device *brdev; + +#ifdef CONFIG_BRIDGE_IGMP_SNOOPING + int igmp; + int mrouters_only; +#endif + + bool proxyarp_replied; + bool src_port_isolated; + +#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); +int br_fdb_hash_init(struct net_bridge *br); +void br_fdb_hash_fini(struct net_bridge *br); +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(struct work_struct *work); +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_find_rcu(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, + bool swdev_notify); +int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, + const unsigned char *addr, u16 vid, + bool swdev_notify); +void br_fdb_offloaded_set(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); + +/* return true if both source port and dest port are isolated */ +static inline bool br_skb_isolated(const struct net_bridge_port *to, + const struct sk_buff *skb) +{ + return BR_INPUT_SKB_CB(skb)->src_port_isolated && + (to->flags & BR_ISOLATED); +} + +/* br_if.c */ +void br_port_carrier_check(struct net_bridge_port *p, bool *notified); +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, + struct netlink_ext_ack *extack); +int br_del_if(struct net_bridge *br, struct net_device *dev); +void br_mtu_auto_adjust(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); +int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev); + +/* 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 bool br_rx_handler_check_rtnl(const struct net_device *dev) +{ + return rcu_dereference_rtnl(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; +} + +static inline struct net_bridge_port * +br_port_get_check_rtnl(const struct net_device *dev) +{ + return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_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); +int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val); +#if IS_ENABLED(CONFIG_IPV6) +int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val); +#endif +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, const unsigned char *src); +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_uninit_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 false; +} + +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 void br_multicast_uninit_stats(struct net_bridge *br) +{ +} + +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, + const struct net_bridge_port *port, + struct net_bridge_vlan_group *vg, + struct sk_buff *skb); +int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, + bool *changed); +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, + bool *changed); +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; +} + +#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, + const struct net_bridge_port *port, + 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, + bool *changed) +{ + *changed = false; + 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, + bool *changed) +{ + *changed = false; + 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_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 __set_ageing_time(struct net_device *dev, unsigned long t); +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, const struct net_bridge *br, + const 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); +int br_switchdev_set_port_flag(struct net_bridge_port *p, + unsigned long flags, + unsigned long mask); +void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, + int type); +int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags); +int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); + +static inline void br_switchdev_frame_unmark(struct sk_buff *skb) +{ + skb->offload_fwd_mark = 0; +} +#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; +} + +static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, + unsigned long flags, + unsigned long mask) +{ + return 0; +} + +static inline int br_switchdev_port_vlan_add(struct net_device *dev, + u16 vid, u16 flags) +{ + return -EOPNOTSUPP; +} + +static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) +{ + return -EOPNOTSUPP; +} + +static inline void +br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type) +{ +} + +static inline void br_switchdev_frame_unmark(struct sk_buff *skb) +{ +} +#endif /* CONFIG_NET_SWITCHDEV */ + +/* br_arp_nd_proxy.c */ +void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); +void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, + u16 vid, struct net_bridge_port *p); +void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, + u16 vid, struct net_bridge_port *p, struct nd_msg *msg); +struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m); +#endif |