1246 lines
35 KiB
C
1246 lines
35 KiB
C
/*
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* Linux ethernet bridge
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*
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* Authors:
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* Lennert Buytenhek <buytenh@gnu.org>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _BR_PRIVATE_H
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#define _BR_PRIVATE_H
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#include <linux/netdevice.h>
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#include <linux/if_bridge.h>
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#include <linux/netpoll.h>
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#include <linux/u64_stats_sync.h>
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#include <net/route.h>
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#include <net/ip6_fib.h>
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#include <linux/if_vlan.h>
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#include <linux/rhashtable.h>
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#include <linux/refcount.h>
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#define BR_HASH_BITS 8
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#define BR_HASH_SIZE (1 << BR_HASH_BITS)
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#define BR_HOLD_TIME (1*HZ)
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#define BR_PORT_BITS 10
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#define BR_MAX_PORTS (1<<BR_PORT_BITS)
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#define BR_MULTICAST_DEFAULT_HASH_MAX 4096
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#define BR_VERSION "2.3"
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/* Control of forwarding link local multicast */
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#define BR_GROUPFWD_DEFAULT 0
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/* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */
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enum {
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BR_GROUPFWD_STP = BIT(0),
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BR_GROUPFWD_MACPAUSE = BIT(1),
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BR_GROUPFWD_LACP = BIT(2),
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};
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#define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \
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BR_GROUPFWD_LACP)
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/* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
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#define BR_GROUPFWD_8021AD 0xB801u
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/* Path to usermode spanning tree program */
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#define BR_STP_PROG "/sbin/bridge-stp"
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typedef struct bridge_id bridge_id;
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typedef struct mac_addr mac_addr;
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typedef __u16 port_id;
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struct bridge_id {
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unsigned char prio[2];
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unsigned char addr[ETH_ALEN];
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};
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struct mac_addr {
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unsigned char addr[ETH_ALEN];
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};
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#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
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/* our own querier */
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struct bridge_mcast_own_query {
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struct timer_list timer;
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u32 startup_sent;
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};
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/* other querier */
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struct bridge_mcast_other_query {
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struct timer_list timer;
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unsigned long delay_time;
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};
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/* selected querier */
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struct bridge_mcast_querier {
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struct br_ip addr;
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struct net_bridge_port __rcu *port;
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};
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/* IGMP/MLD statistics */
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struct bridge_mcast_stats {
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struct br_mcast_stats mstats;
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struct u64_stats_sync syncp;
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};
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#endif
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struct br_vlan_stats {
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u64 rx_bytes;
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u64 rx_packets;
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u64 tx_bytes;
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u64 tx_packets;
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struct u64_stats_sync syncp;
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};
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struct br_tunnel_info {
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__be64 tunnel_id;
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struct metadata_dst *tunnel_dst;
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};
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/* private vlan flags */
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enum {
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BR_VLFLAG_PER_PORT_STATS = BIT(0),
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BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1),
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};
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/**
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* struct net_bridge_vlan - per-vlan entry
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*
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* @vnode: rhashtable member
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* @vid: VLAN id
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* @flags: bridge vlan flags
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* @priv_flags: private (in-kernel) bridge vlan flags
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* @stats: per-cpu VLAN statistics
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* @br: if MASTER flag set, this points to a bridge struct
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* @port: if MASTER flag unset, this points to a port struct
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* @refcnt: if MASTER flag set, this is bumped for each port referencing it
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* @brvlan: if MASTER flag unset, this points to the global per-VLAN context
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* for this VLAN entry
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* @vlist: sorted list of VLAN entries
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* @rcu: used for entry destruction
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*
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* This structure is shared between the global per-VLAN entries contained in
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* the bridge rhashtable and the local per-port per-VLAN entries contained in
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* the port's rhashtable. The union entries should be interpreted depending on
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* the entry flags that are set.
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*/
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struct net_bridge_vlan {
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struct rhash_head vnode;
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struct rhash_head tnode;
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u16 vid;
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u16 flags;
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u16 priv_flags;
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struct br_vlan_stats __percpu *stats;
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union {
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struct net_bridge *br;
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struct net_bridge_port *port;
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};
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union {
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refcount_t refcnt;
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struct net_bridge_vlan *brvlan;
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};
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struct br_tunnel_info tinfo;
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struct list_head vlist;
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struct rcu_head rcu;
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};
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/**
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* struct net_bridge_vlan_group
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*
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* @vlan_hash: VLAN entry rhashtable
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* @vlan_list: sorted VLAN entry list
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* @num_vlans: number of total VLAN entries
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* @pvid: PVID VLAN id
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*
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* IMPORTANT: Be careful when checking if there're VLAN entries using list
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* primitives because the bridge can have entries in its list which
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* are just for global context but not for filtering, i.e. they have
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* the master flag set but not the brentry flag. If you have to check
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* if there're "real" entries in the bridge please test @num_vlans
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*/
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struct net_bridge_vlan_group {
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struct rhashtable vlan_hash;
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struct rhashtable tunnel_hash;
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struct list_head vlan_list;
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u16 num_vlans;
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u16 pvid;
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};
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struct net_bridge_fdb_key {
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mac_addr addr;
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u16 vlan_id;
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};
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struct net_bridge_fdb_entry {
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struct rhash_head rhnode;
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struct net_bridge_port *dst;
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struct net_bridge_fdb_key key;
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struct hlist_node fdb_node;
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unsigned char is_local:1,
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is_static:1,
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is_sticky:1,
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added_by_user:1,
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added_by_external_learn:1,
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offloaded:1;
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/* write-heavy members should not affect lookups */
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unsigned long updated ____cacheline_aligned_in_smp;
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unsigned long used;
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struct rcu_head rcu;
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};
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#define MDB_PG_FLAGS_PERMANENT BIT(0)
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#define MDB_PG_FLAGS_OFFLOAD BIT(1)
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struct net_bridge_port_group {
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struct net_bridge_port *port;
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struct net_bridge_port_group __rcu *next;
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struct hlist_node mglist;
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struct rcu_head rcu;
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struct timer_list timer;
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struct br_ip addr;
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unsigned char flags;
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unsigned char eth_addr[ETH_ALEN];
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};
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struct net_bridge_mdb_entry {
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struct rhash_head rhnode;
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struct net_bridge *br;
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struct net_bridge_port_group __rcu *ports;
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struct rcu_head rcu;
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struct timer_list timer;
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struct br_ip addr;
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bool host_joined;
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struct hlist_node mdb_node;
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};
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struct net_bridge_port {
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struct net_bridge *br;
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struct net_device *dev;
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struct list_head list;
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unsigned long flags;
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#ifdef CONFIG_BRIDGE_VLAN_FILTERING
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struct net_bridge_vlan_group __rcu *vlgrp;
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#endif
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struct net_bridge_port __rcu *backup_port;
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/* STP */
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u8 priority;
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u8 state;
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u16 port_no;
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unsigned char topology_change_ack;
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unsigned char config_pending;
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port_id port_id;
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port_id designated_port;
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bridge_id designated_root;
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bridge_id designated_bridge;
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u32 path_cost;
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u32 designated_cost;
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unsigned long designated_age;
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struct timer_list forward_delay_timer;
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struct timer_list hold_timer;
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struct timer_list message_age_timer;
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struct kobject kobj;
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struct rcu_head rcu;
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#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
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struct bridge_mcast_own_query ip4_own_query;
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#if IS_ENABLED(CONFIG_IPV6)
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struct bridge_mcast_own_query ip6_own_query;
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#endif /* IS_ENABLED(CONFIG_IPV6) */
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unsigned char multicast_router;
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struct bridge_mcast_stats __percpu *mcast_stats;
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struct timer_list multicast_router_timer;
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struct hlist_head mglist;
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struct hlist_node rlist;
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#endif
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#ifdef CONFIG_SYSFS
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char sysfs_name[IFNAMSIZ];
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#endif
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#ifdef CONFIG_NET_POLL_CONTROLLER
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struct netpoll *np;
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#endif
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#ifdef CONFIG_NET_SWITCHDEV
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int offload_fwd_mark;
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#endif
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u16 group_fwd_mask;
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u16 backup_redirected_cnt;
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};
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#define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj)
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#define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
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#define br_promisc_port(p) ((p)->flags & BR_PROMISC)
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#define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
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static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
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{
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return rcu_dereference(dev->rx_handler_data);
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}
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static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
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{
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return br_port_exists(dev) ?
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rtnl_dereference(dev->rx_handler_data) : NULL;
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}
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static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev)
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{
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return br_port_exists(dev) ?
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rcu_dereference_rtnl(dev->rx_handler_data) : NULL;
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}
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enum net_bridge_opts {
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BROPT_VLAN_ENABLED,
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BROPT_VLAN_STATS_ENABLED,
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BROPT_NF_CALL_IPTABLES,
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BROPT_NF_CALL_IP6TABLES,
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BROPT_NF_CALL_ARPTABLES,
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BROPT_GROUP_ADDR_SET,
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BROPT_MULTICAST_ENABLED,
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BROPT_MULTICAST_QUERIER,
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BROPT_MULTICAST_QUERY_USE_IFADDR,
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BROPT_MULTICAST_STATS_ENABLED,
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BROPT_HAS_IPV6_ADDR,
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BROPT_NEIGH_SUPPRESS_ENABLED,
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BROPT_MTU_SET_BY_USER,
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BROPT_VLAN_STATS_PER_PORT,
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BROPT_NO_LL_LEARN,
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};
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struct net_bridge {
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spinlock_t lock;
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spinlock_t hash_lock;
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struct list_head port_list;
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struct net_device *dev;
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struct pcpu_sw_netstats __percpu *stats;
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unsigned long options;
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/* These fields are accessed on each packet */
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#ifdef CONFIG_BRIDGE_VLAN_FILTERING
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__be16 vlan_proto;
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u16 default_pvid;
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struct net_bridge_vlan_group __rcu *vlgrp;
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#endif
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struct rhashtable fdb_hash_tbl;
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#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
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union {
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struct rtable fake_rtable;
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struct rt6_info fake_rt6_info;
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};
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#endif
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u16 group_fwd_mask;
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u16 group_fwd_mask_required;
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/* STP */
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bridge_id designated_root;
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bridge_id bridge_id;
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unsigned char topology_change;
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unsigned char topology_change_detected;
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u16 root_port;
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unsigned long max_age;
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unsigned long hello_time;
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unsigned long forward_delay;
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unsigned long ageing_time;
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unsigned long bridge_max_age;
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unsigned long bridge_hello_time;
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unsigned long bridge_forward_delay;
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unsigned long bridge_ageing_time;
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u32 root_path_cost;
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u8 group_addr[ETH_ALEN];
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enum {
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BR_NO_STP, /* no spanning tree */
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BR_KERNEL_STP, /* old STP in kernel */
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BR_USER_STP, /* new RSTP in userspace */
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} stp_enabled;
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#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
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u32 hash_max;
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u32 multicast_last_member_count;
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u32 multicast_startup_query_count;
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u8 multicast_igmp_version;
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u8 multicast_router;
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#if IS_ENABLED(CONFIG_IPV6)
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u8 multicast_mld_version;
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#endif
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spinlock_t multicast_lock;
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unsigned long multicast_last_member_interval;
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unsigned long multicast_membership_interval;
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unsigned long multicast_querier_interval;
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unsigned long multicast_query_interval;
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unsigned long multicast_query_response_interval;
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unsigned long multicast_startup_query_interval;
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struct rhashtable mdb_hash_tbl;
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struct hlist_head mdb_list;
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struct hlist_head router_list;
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struct timer_list multicast_router_timer;
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struct bridge_mcast_other_query ip4_other_query;
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struct bridge_mcast_own_query ip4_own_query;
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struct bridge_mcast_querier ip4_querier;
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struct bridge_mcast_stats __percpu *mcast_stats;
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#if IS_ENABLED(CONFIG_IPV6)
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struct bridge_mcast_other_query ip6_other_query;
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struct bridge_mcast_own_query ip6_own_query;
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struct bridge_mcast_querier ip6_querier;
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#endif /* IS_ENABLED(CONFIG_IPV6) */
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#endif
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struct timer_list hello_timer;
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struct timer_list tcn_timer;
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struct timer_list topology_change_timer;
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struct delayed_work gc_work;
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struct kobject *ifobj;
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u32 auto_cnt;
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#ifdef CONFIG_NET_SWITCHDEV
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int offload_fwd_mark;
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#endif
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struct hlist_head fdb_list;
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};
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struct br_input_skb_cb {
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struct net_device *brdev;
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#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
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int igmp;
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int mrouters_only;
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#endif
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bool proxyarp_replied;
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bool src_port_isolated;
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#ifdef CONFIG_BRIDGE_VLAN_FILTERING
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bool vlan_filtered;
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#endif
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#ifdef CONFIG_NET_SWITCHDEV
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int offload_fwd_mark;
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#endif
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};
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#define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
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#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
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# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
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#else
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# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
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#endif
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#define br_printk(level, br, format, args...) \
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printk(level "%s: " format, (br)->dev->name, ##args)
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#define br_err(__br, format, args...) \
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br_printk(KERN_ERR, __br, format, ##args)
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#define br_warn(__br, format, args...) \
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br_printk(KERN_WARNING, __br, format, ##args)
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#define br_notice(__br, format, args...) \
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br_printk(KERN_NOTICE, __br, format, ##args)
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#define br_info(__br, format, args...) \
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br_printk(KERN_INFO, __br, format, ##args)
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#define br_debug(br, format, args...) \
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pr_debug("%s: " format, (br)->dev->name, ##args)
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/* called under bridge lock */
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static inline int br_is_root_bridge(const struct net_bridge *br)
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{
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return !memcmp(&br->bridge_id, &br->designated_root, 8);
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}
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/* check if a VLAN entry is global */
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static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
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{
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return v->flags & BRIDGE_VLAN_INFO_MASTER;
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}
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/* check if a VLAN entry is used by the bridge */
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static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
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{
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return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
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}
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/* check if we should use the vlan entry, returns false if it's only context */
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static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
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{
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if (br_vlan_is_master(v)) {
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if (br_vlan_is_brentry(v))
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return true;
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else
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return false;
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}
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return true;
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}
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static inline int br_opt_get(const struct net_bridge *br,
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enum net_bridge_opts opt)
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{
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return test_bit(opt, &br->options);
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}
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int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
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struct netlink_ext_ack *extack);
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int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt);
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int br_boolopt_multi_toggle(struct net_bridge *br,
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struct br_boolopt_multi *bm,
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struct netlink_ext_ack *extack);
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void br_boolopt_multi_get(const struct net_bridge *br,
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struct br_boolopt_multi *bm);
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void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on);
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/* br_device.c */
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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,
|
|
struct netlink_ext_ack *extack);
|
|
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_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev,
|
|
const unsigned char *addr, u16 vid, u32 portid, u32 seq,
|
|
struct netlink_ext_ack *extack);
|
|
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, bool offloaded);
|
|
|
|
/* 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
|
|
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 *br, struct br_ip *dst);
|
|
struct net_bridge_mdb_entry *
|
|
br_multicast_new_group(struct net_bridge *br, struct br_ip *group);
|
|
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);
|
|
int br_mdb_hash_init(struct net_bridge *br);
|
|
void br_mdb_hash_fini(struct net_bridge *br);
|
|
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);
|
|
void br_mdb_init(void);
|
|
void br_mdb_uninit(void);
|
|
|
|
#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_opt_get(br, BROPT_MULTICAST_QUERIER)) {
|
|
if (is_ipv6 && !br_opt_get(br, BROPT_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 int br_mdb_hash_init(struct net_bridge *br)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void br_mdb_hash_fini(struct net_bridge *br)
|
|
{
|
|
}
|
|
|
|
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, struct netlink_ext_ack *extack);
|
|
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_set_stats_per_port(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,
|
|
struct netlink_ext_ack *extack);
|
|
int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
|
|
bool *changed, struct netlink_ext_ack *extack);
|
|
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, struct netlink_ext_ack *extack);
|
|
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_id(skb);
|
|
} 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, struct netlink_ext_ack *extack)
|
|
{
|
|
*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, struct netlink_ext_ack *extack)
|
|
{
|
|
*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,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
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,
|
|
struct netlink_ext_ack *extack);
|
|
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,
|
|
struct netlink_ext_ack *extack);
|
|
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,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
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
|