Release 4.11 net/bridge/br_private.h

/*
 *      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 br_tunnel_info {
	
__be64			tunnel_id;
	
struct metadata_dst	*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 {
		
atomic_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_entry {
	
struct hlist_node		hlist;
	
struct net_bridge_port		*dst;

	
mac_addr			addr;
	
__u16				vlan_id;
	
unsigned char			is_local:1,
					
is_static:1,
					
added_by_user:1,
					
added_by_external_learn: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			flags;
	
unsigned char			eth_addr[ETH_ALEN];
};


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;

	
unsigned long			flags;
#ifdef CONFIG_BRIDGE_VLAN_FILTERING
	
struct net_bridge_vlan_group	__rcu *vlgrp;
#endif

	/* 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
};


#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);
}

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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;
}

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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 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 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
};


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

#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);
}

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/* 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;
}

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/* 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;
}

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/* 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;
}

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/* 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);
}

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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)
{
}

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static inline int br_netpoll_enable(struct net_bridge_port *p)
{
	return 0;
}

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static inline void br_netpoll_disable(struct net_bridge_port *p)
{
}
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#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(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);
int br_fdb_external_learn_del(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);

/* 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;
}

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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;
}

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/* 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));
}

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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));
}

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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;
	}
}

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static inline int br_multicast_igmp_type(const struct sk_buff *skb)
{
	return BR_INPUT_SKB_CB(skb)->igmp;
}
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#else


static inline int br_multicast_rcv(struct net_bridge *br,
				   struct net_bridge_port *port,
				   struct sk_buff *skb,
				   u16 vid)
{
	return 0;
}

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static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
						      struct sk_buff *skb, u16 vid)
{
	return NULL;
}

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static inline int br_multicast_add_port(struct net_bridge_port *port)
{
	return 0;
}

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static inline void br_multicast_del_port(struct net_bridge_port *port)
{
}

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static inline void br_multicast_enable_port(struct net_bridge_port *port)
{
}

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static inline void br_multicast_disable_port(struct net_bridge_port *port)
{
}

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static inline void br_multicast_init(struct net_bridge *br)
{
}

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static inline void br_multicast_open(struct net_bridge *br)
{
}

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static inline void br_multicast_stop(struct net_bridge *br)
{
}

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static inline void br_multicast_dev_del(struct net_bridge *br)
{
}

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static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
				      struct sk_buff *skb,
				      bool local_rcv, bool local_orig)
{
}

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static inline bool br_multicast_is_router(struct net_bridge *br)
{
	return 0;
}

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static inline bool br_multicast_querier_exists(struct net_bridge *br,
					       struct ethhdr *eth)
{
	return false;
}

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static inline void br_mdb_init(void)
{
}

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static inline void br_mdb_uninit(void)
{
}

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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)
{
}

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static inline int br_multicast_init_stats(struct net_bridge *br)
{
	return 0;
}

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static inline void br_multicast_uninit_stats(struct net_bridge *br)
{
}

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static inline int br_multicast_igmp_type(const struct sk_buff *skb)
{
	return 0;
}
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#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);
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);
}

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static inline struct net_bridge_vlan_group *nbp_vlan_group(
					const struct net_bridge_port *p)
{
	return rtnl_dereference(p->vlgrp);
}

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static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
					const struct net_bridge *br)
{
	return rcu_dereference(br->vlgrp);
}

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static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
					const struct net_bridge_port *p)
{
	return rcu_dereference(p->vlgrp);
}

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/* 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;
}

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static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
{
	if (!vg)
		return 0;

	smp_rmb();
	return vg->pvid;
}

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static inline int br_vlan_enabled(struct net_bridge *br)
{
	return br->vlan_enabled;
}
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#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;
}

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static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
				     const struct sk_buff *skb)
{
	return true;
}

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static inline bool br_should_learn(struct net_bridge_port *p,
				   struct sk_buff *skb, u16 *vid)
{
	return true;
}

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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;
}

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static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags)
{
	return -EOPNOTSUPP;
}

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static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
{
	return -EOPNOTSUPP;
}

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static inline void br_vlan_flush(struct net_bridge *br)
{
}

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static inline void br_recalculate_fwd_mask(struct net_bridge *br)
{
}

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static inline int br_vlan_init(struct net_bridge *br)
{
	return 0;
}

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static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags)
{
	return -EOPNOTSUPP;
}

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static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
{
	return -EOPNOTSUPP;
}

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static inline void nbp_vlan_flush(struct net_bridge_port *port)
{
}

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static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
						   u16 vid)
{
	return NULL;
}

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static inline int nbp_vlan_init(struct net_bridge_port *port)
{
	return 0;
}

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static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
{
	return 0;
}

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static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
{
	return 0;
}

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static inline int br_vlan_enabled(struct net_bridge *br)
{
	return 0;
}

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static inline int __br_vlan_filter_toggle(struct net_bridge *br,
					  unsigned long val)
{
	return -EOPNOTSUPP;
}

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static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
					 u32 filter_mask)
{
	return 0;
}

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static inline struct net_bridge_vlan_group *br_vlan_group(
					const struct net_bridge *br)
{
	return NULL;
}

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static inline struct net_bridge_vlan_group *nbp_vlan_group(
					const struct net_bridge_port *p)
{
	return NULL;
}

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static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
					const struct net_bridge *br)
{
	return NULL;
}

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static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
					const struct net_bridge_port *p)
{
	return NULL;
}

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static inline void br_vlan_get_stats(const struct net_bridge_vlan *v,
				     struct br_vlan_stats *stats)
{
}
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#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; }
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static inline void br_nf_core_fini(void) {}
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#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, 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; }
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static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
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static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
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4
26.67%
1
50.00%
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15
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2
100.00%



static inline void br_sysfs_delbr(struct net_device *dev) { return; }
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9
69.23%
1
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Stephen Hemminger
4
30.77%
1
50.00%
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13
100.00%
2
100.00%

#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);
#else


static inline int nbp_switchdev_mark_set(struct net_bridge_port *p)
{
	return 0;
}

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static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
					    struct sk_buff *skb)
{
}

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static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
						const struct sk_buff *skb)
{
	return true;
}
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#endif /* CONFIG_NET_SWITCHDEV */

#endif
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Nikolay Aleksandrov
786
16.42%
22
11.17%
Vlad Yasevich
706
14.75%
22
11.17%
Stephen Hemminger
706
14.75%
48
24.37%
Herbert Xu
653
13.64%
12
6.09%
Linus Torvalds (pre-git)
435
9.09%
1
0.51%
Linus Lüssing
224
4.68%
5
2.54%
Toshiaki Makita
153
3.20%
8
4.06%
Ido Schimmel
143
2.99%
2
1.02%
Américo Wang
131
2.74%
8
4.06%
Jiri Pirko
127
2.65%
7
3.55%
John Fastabend
63
1.32%
2
1.02%
Pablo Neira Ayuso
57
1.19%
2
1.02%
daniel
50
1.04%
1
0.51%
Roopa Prabhu
44
0.92%
4
2.03%
Lee Jones
42
0.88%
1
0.51%
Bart De Schuymer
38
0.79%
2
1.02%
Sridhar Samudrala
38
0.79%
1
0.51%
Hideaki Yoshifuji / 吉藤英明
30
0.63%
2
1.02%
Eric Dumazet
28
0.59%
4
2.03%
Satish Ashok
26
0.54%
2
1.02%
Simon Arlott
24
0.50%
1
0.51%
Simon Wunderlich
24
0.50%
1
0.51%
Linus Torvalds
24
0.50%
2
1.02%
Eric W. Biedermann
20
0.42%
2
1.02%
Vivien Didelot
20
0.42%
3
1.52%
Elad Raz
20
0.42%
2
1.02%
Patrick McHardy
19
0.40%
2
1.02%
Michał Mirosław
19
0.40%
3
1.52%
Rami Rosen
16
0.33%
1
0.51%
Scott Feldman
15
0.31%
2
1.02%
Chas Williams
15
0.31%
1
0.51%
David S. Miller
15
0.31%
1
0.51%
Felix Fietkau
13
0.27%
1
0.51%
Bernhard Thaler
13
0.27%
2
1.02%
Florian Fainelli
12
0.25%
1
0.51%
Alexey Dobriyan
10
0.21%
1
0.51%
Jamal Hadi Salim
5
0.10%
1
0.51%
Hong Zhi Guo
3
0.06%
2
1.02%
Al Viro
3
0.06%
1
0.51%
Jouni Malinen
3
0.06%
1
0.51%
Nicolas Dichtel
3
0.06%
1
0.51%
Joe Perches
2
0.04%
1
0.51%
Emese Revfy
1
0.02%
1
0.51%
Adrian Bunk
1
0.02%
1
0.51%
Li RongQing
1
0.02%
1
0.51%
Thomas Graf
1
0.02%
1
0.51%
Akinobu Mita
1
0.02%
1
0.51%
Igor Maravić
1
0.02%
1
0.51%
Greg Kroah-Hartman
1
0.02%
1
0.51%
Michael Braun
1
0.02%
1
0.51%
Alexei Starovoitov
0.00%
0
0.00%
Total
4786
100.00%
197
100.00%
Directory: net/bridge

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