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br_private.h
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br_private.h
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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Linux ethernet bridge
*
* Authors:
* Lennert Buytenhek <buytenh@gnu.org>
*/
#ifndef _BR_PRIVATE_H
#define _BR_PRIVATE_H
#include <linux/netdevice.h>
#include <linux/if_bridge.h>
#include <linux/netpoll.h>
#include <linux/u64_stats_sync.h>
#include <net/route.h>
#include <net/ip6_fib.h>
#include <linux/if_vlan.h>
#include <linux/rhashtable.h>
#include <linux/refcount.h>
#define BR_HASH_BITS 8
#define BR_HASH_SIZE (1 << BR_HASH_BITS)
#define BR_HOLD_TIME (1*HZ)
#define BR_PORT_BITS 10
#define BR_MAX_PORTS (1<<BR_PORT_BITS)
#define BR_MULTICAST_DEFAULT_HASH_MAX 4096
#define BR_MULTICAST_QUERY_INTVL_MIN msecs_to_jiffies(1000)
#define BR_HWDOM_MAX BITS_PER_LONG
#define BR_VERSION "2.3"
/* Control of forwarding link local multicast */
#define BR_GROUPFWD_DEFAULT 0
/* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */
enum {
BR_GROUPFWD_STP = BIT(0),
BR_GROUPFWD_MACPAUSE = BIT(1),
BR_GROUPFWD_LACP = BIT(2),
};
#define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \
BR_GROUPFWD_LACP)
/* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
#define BR_GROUPFWD_8021AD 0xB801u
/* Path to usermode spanning tree program */
#define BR_STP_PROG "/sbin/bridge-stp"
#define BR_FDB_NOTIFY_SETTABLE_BITS (FDB_NOTIFY_BIT | FDB_NOTIFY_INACTIVE_BIT)
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;
int port_ifidx;
seqcount_spinlock_t seq;
};
/* IGMP/MLD statistics */
struct bridge_mcast_stats {
struct br_mcast_stats mstats;
struct u64_stats_sync syncp;
};
#endif
/* net_bridge_mcast_port must be always defined due to forwarding stubs */
struct net_bridge_mcast_port {
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
struct net_bridge_port *port;
struct net_bridge_vlan *vlan;
struct bridge_mcast_own_query ip4_own_query;
struct timer_list ip4_mc_router_timer;
struct hlist_node ip4_rlist;
#if IS_ENABLED(CONFIG_IPV6)
struct bridge_mcast_own_query ip6_own_query;
struct timer_list ip6_mc_router_timer;
struct hlist_node ip6_rlist;
#endif /* IS_ENABLED(CONFIG_IPV6) */
unsigned char multicast_router;
#endif /* CONFIG_BRIDGE_IGMP_SNOOPING */
};
/* net_bridge_mcast must be always defined due to forwarding stubs */
struct net_bridge_mcast {
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
struct net_bridge *br;
struct net_bridge_vlan *vlan;
u32 multicast_last_member_count;
u32 multicast_startup_query_count;
u8 multicast_querier;
u8 multicast_igmp_version;
u8 multicast_router;
#if IS_ENABLED(CONFIG_IPV6)
u8 multicast_mld_version;
#endif
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;
struct hlist_head ip4_mc_router_list;
struct timer_list ip4_mc_router_timer;
struct bridge_mcast_other_query ip4_other_query;
struct bridge_mcast_own_query ip4_own_query;
struct bridge_mcast_querier ip4_querier;
#if IS_ENABLED(CONFIG_IPV6)
struct hlist_head ip6_mc_router_list;
struct timer_list ip6_mc_router_timer;
struct bridge_mcast_other_query ip6_other_query;
struct bridge_mcast_own_query ip6_own_query;
struct bridge_mcast_querier ip6_querier;
#endif /* IS_ENABLED(CONFIG_IPV6) */
#endif /* CONFIG_BRIDGE_IGMP_SNOOPING */
};
struct br_tunnel_info {
__be64 tunnel_id;
struct metadata_dst __rcu *tunnel_dst;
};
/* private vlan flags */
enum {
BR_VLFLAG_PER_PORT_STATS = BIT(0),
BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1),
BR_VLFLAG_MCAST_ENABLED = BIT(2),
BR_VLFLAG_GLOBAL_MCAST_ENABLED = BIT(3),
};
/**
* struct net_bridge_vlan - per-vlan entry
*
* @vnode: rhashtable member
* @vid: VLAN id
* @flags: bridge vlan flags
* @priv_flags: private (in-kernel) bridge vlan flags
* @state: STP state (e.g. blocking, learning, forwarding)
* @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
* @br_mcast_ctx: if MASTER flag set, this is the global vlan multicast context
* @port_mcast_ctx: if MASTER flag unset, this is the per-port/vlan multicast
* context
* @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;
u16 priv_flags;
u8 state;
struct pcpu_sw_netstats __percpu *stats;
union {
struct net_bridge *br;
struct net_bridge_port *port;
};
union {
refcount_t refcnt;
struct net_bridge_vlan *brvlan;
};
struct br_tunnel_info tinfo;
union {
struct net_bridge_mcast br_mcast_ctx;
struct net_bridge_mcast_port port_mcast_ctx;
};
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
* @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking)
*
* 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;
u8 pvid_state;
};
/* bridge fdb flags */
enum {
BR_FDB_LOCAL,
BR_FDB_STATIC,
BR_FDB_STICKY,
BR_FDB_ADDED_BY_USER,
BR_FDB_ADDED_BY_EXT_LEARN,
BR_FDB_OFFLOADED,
BR_FDB_NOTIFY,
BR_FDB_NOTIFY_INACTIVE
};
struct net_bridge_fdb_key {
mac_addr addr;
u16 vlan_id;
};
struct net_bridge_fdb_entry {
struct rhash_head rhnode;
struct net_bridge_port *dst;
struct net_bridge_fdb_key key;
struct hlist_node fdb_node;
unsigned long flags;
/* 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)
#define MDB_PG_FLAGS_FAST_LEAVE BIT(2)
#define MDB_PG_FLAGS_STAR_EXCL BIT(3)
#define MDB_PG_FLAGS_BLOCKED BIT(4)
#define PG_SRC_ENT_LIMIT 32
#define BR_SGRP_F_DELETE BIT(0)
#define BR_SGRP_F_SEND BIT(1)
#define BR_SGRP_F_INSTALLED BIT(2)
struct net_bridge_mcast_gc {
struct hlist_node gc_node;
void (*destroy)(struct net_bridge_mcast_gc *gc);
};
struct net_bridge_group_src {
struct hlist_node node;
struct br_ip addr;
struct net_bridge_port_group *pg;
u8 flags;
u8 src_query_rexmit_cnt;
struct timer_list timer;
struct net_bridge *br;
struct net_bridge_mcast_gc mcast_gc;
struct rcu_head rcu;
};
struct net_bridge_port_group_sg_key {
struct net_bridge_port *port;
struct br_ip addr;
};
struct net_bridge_port_group {
struct net_bridge_port_group __rcu *next;
struct net_bridge_port_group_sg_key key;
unsigned char eth_addr[ETH_ALEN] __aligned(2);
unsigned char flags;
unsigned char filter_mode;
unsigned char grp_query_rexmit_cnt;
unsigned char rt_protocol;
struct hlist_head src_list;
unsigned int src_ents;
struct timer_list timer;
struct timer_list rexmit_timer;
struct hlist_node mglist;
struct rb_root eht_set_tree;
struct rb_root eht_host_tree;
struct rhash_head rhnode;
struct net_bridge_mcast_gc mcast_gc;
struct rcu_head rcu;
};
struct net_bridge_mdb_entry {
struct rhash_head rhnode;
struct net_bridge *br;
struct net_bridge_port_group __rcu *ports;
struct br_ip addr;
bool host_joined;
struct timer_list timer;
struct hlist_node mdb_node;
struct net_bridge_mcast_gc mcast_gc;
struct rcu_head rcu;
};
struct net_bridge_port {
struct net_bridge *br;
struct net_device *dev;
struct list_head list;
unsigned long flags;
#ifdef CONFIG_BRIDGE_VLAN_FILTERING
struct net_bridge_vlan_group __rcu *vlgrp;
#endif
struct net_bridge_port __rcu *backup_port;
/* STP */
u8 priority;
u8 state;
u16 port_no;
unsigned char topology_change_ack;
unsigned char config_pending;
port_id port_id;
port_id designated_port;
bridge_id designated_root;
bridge_id designated_bridge;
u32 path_cost;
u32 designated_cost;
unsigned long designated_age;
struct timer_list forward_delay_timer;
struct timer_list hold_timer;
struct timer_list message_age_timer;
struct kobject kobj;
struct rcu_head rcu;
struct net_bridge_mcast_port multicast_ctx;
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
struct bridge_mcast_stats __percpu *mcast_stats;
u32 multicast_eht_hosts_limit;
u32 multicast_eht_hosts_cnt;
struct hlist_head mglist;
#endif
#ifdef CONFIG_SYSFS
char sysfs_name[IFNAMSIZ];
#endif
#ifdef CONFIG_NET_POLL_CONTROLLER
struct netpoll *np;
#endif
#ifdef CONFIG_NET_SWITCHDEV
/* Identifier used to group ports that share the same switchdev
* hardware domain.
*/
int hwdom;
int offload_count;
struct netdev_phys_item_id ppid;
#endif
u16 group_fwd_mask;
u16 backup_redirected_cnt;
struct bridge_stp_xstats stp_xstats;
};
#define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj)
#define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
#define br_promisc_port(p) ((p)->flags & BR_PROMISC)
static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
{
return rcu_dereference(dev->rx_handler_data);
}
static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
{
return netif_is_bridge_port(dev) ?
rtnl_dereference(dev->rx_handler_data) : NULL;
}
static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev)
{
return netif_is_bridge_port(dev) ?
rcu_dereference_rtnl(dev->rx_handler_data) : NULL;
}
enum net_bridge_opts {
BROPT_VLAN_ENABLED,
BROPT_VLAN_STATS_ENABLED,
BROPT_NF_CALL_IPTABLES,
BROPT_NF_CALL_IP6TABLES,
BROPT_NF_CALL_ARPTABLES,
BROPT_GROUP_ADDR_SET,
BROPT_MULTICAST_ENABLED,
BROPT_MULTICAST_QUERY_USE_IFADDR,
BROPT_MULTICAST_STATS_ENABLED,
BROPT_HAS_IPV6_ADDR,
BROPT_NEIGH_SUPPRESS_ENABLED,
BROPT_MTU_SET_BY_USER,
BROPT_VLAN_STATS_PER_PORT,
BROPT_NO_LL_LEARN,
BROPT_VLAN_BRIDGE_BINDING,
BROPT_MCAST_VLAN_SNOOPING_ENABLED,
};
struct net_bridge {
spinlock_t lock;
spinlock_t hash_lock;
struct hlist_head frame_type_list;
struct net_device *dev;
unsigned long options;
/* These fields are accessed on each packet */
#ifdef CONFIG_BRIDGE_VLAN_FILTERING
__be16 vlan_proto;
u16 default_pvid;
struct net_bridge_vlan_group __rcu *vlgrp;
#endif
struct rhashtable fdb_hash_tbl;
struct list_head port_list;
#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
union {
struct rtable fake_rtable;
struct rt6_info fake_rt6_info;
};
#endif
u16 group_fwd_mask;
u16 group_fwd_mask_required;
/* STP */
bridge_id designated_root;
bridge_id bridge_id;
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;
u32 root_path_cost;
u8 group_addr[ETH_ALEN];
enum {
BR_NO_STP, /* no spanning tree */
BR_KERNEL_STP, /* old STP in kernel */
BR_USER_STP, /* new RSTP in userspace */
} stp_enabled;
struct net_bridge_mcast multicast_ctx;
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
struct bridge_mcast_stats __percpu *mcast_stats;
u32 hash_max;
spinlock_t multicast_lock;
struct rhashtable mdb_hash_tbl;
struct rhashtable sg_port_tbl;
struct hlist_head mcast_gc_list;
struct hlist_head mdb_list;
struct work_struct mcast_gc_work;
#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
/* Counter used to make sure that hardware domains get unique
* identifiers in case a bridge spans multiple switchdev instances.
*/
int last_hwdom;
/* Bit mask of hardware domain numbers in use */
unsigned long busy_hwdoms;
#endif
struct hlist_head fdb_list;
#if IS_ENABLED(CONFIG_BRIDGE_MRP)
struct hlist_head mrp_list;
#endif
#if IS_ENABLED(CONFIG_BRIDGE_CFM)
struct hlist_head mep_list;
#endif
};
struct br_input_skb_cb {
struct net_device *brdev;
u16 frag_max_size;
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
u8 igmp;
u8 mrouters_only:1;
#endif
u8 proxyarp_replied:1;
u8 src_port_isolated:1;
#ifdef CONFIG_BRIDGE_VLAN_FILTERING
u8 vlan_filtered:1;
#endif
#ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
u8 br_netfilter_broute:1;
#endif
#ifdef CONFIG_NET_SWITCHDEV
/* Set if TX data plane offloading is used towards at least one
* hardware domain.
*/
u8 tx_fwd_offload:1;
/* The switchdev hardware domain from which this packet was received.
* If skb->offload_fwd_mark was set, then this packet was already
* forwarded by hardware to the other ports in the source hardware
* domain, otherwise it wasn't.
*/
int src_hwdom;
/* Bit mask of hardware domains towards this packet has already been
* transmitted using the TX data plane offload.
*/
unsigned long fwd_hwdoms;
#endif
};
#define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
#else
# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
#endif
#define br_printk(level, br, format, args...) \
printk(level "%s: " format, (br)->dev->name, ##args)
#define br_err(__br, format, args...) \
br_printk(KERN_ERR, __br, format, ##args)
#define br_warn(__br, format, args...) \
br_printk(KERN_WARNING, __br, format, ##args)
#define br_notice(__br, format, args...) \
br_printk(KERN_NOTICE, __br, format, ##args)
#define br_info(__br, format, args...) \
br_printk(KERN_INFO, __br, format, ##args)
#define br_debug(br, format, args...) \
pr_debug("%s: " format, (br)->dev->name, ##args)
/* called under bridge lock */
static inline int br_is_root_bridge(const struct net_bridge *br)
{
return !memcmp(&br->bridge_id, &br->designated_root, 8);
}
/* check if a VLAN entry is global */
static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
{
return v->flags & BRIDGE_VLAN_INFO_MASTER;
}
/* check if a VLAN entry is used by the bridge */
static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
{
return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
}
/* check if we should use the vlan entry, returns false if it's only context */
static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
{
if (br_vlan_is_master(v)) {
if (br_vlan_is_brentry(v))
return true;
else
return false;
}
return true;
}
static inline bool nbp_state_should_learn(const struct net_bridge_port *p)
{
return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING;
}
static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack)
{
bool ret = vid > 0 && vid < VLAN_VID_MASK;
if (!ret)
NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid");
return ret;
}
static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur,
const struct bridge_vlan_info *last,
struct netlink_ext_ack *extack)
{
/* pvid flag is not allowed in ranges */
if (cur->flags & BRIDGE_VLAN_INFO_PVID) {
NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range");
return false;
}
/* when cur is the range end, check if:
* - it has range start flag
* - range ids are invalid (end is equal to or before start)
*/
if (last) {
if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one");
return false;
} else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) {
NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing");
return false;
} else if (cur->vid <= last->vid) {
NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id");
return false;
}
}
/* check for required range flags */
if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN |
BRIDGE_VLAN_INFO_RANGE_END))) {
NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing");
return false;
}
return true;
}
static inline u8 br_vlan_multicast_router(const struct net_bridge_vlan *v)
{
u8 mcast_router = MDB_RTR_TYPE_DISABLED;
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
if (!br_vlan_is_master(v))
mcast_router = v->port_mcast_ctx.multicast_router;
else
mcast_router = v->br_mcast_ctx.multicast_router;
#endif
return mcast_router;
}
static inline int br_afspec_cmd_to_rtm(int cmd)
{
switch (cmd) {
case RTM_SETLINK:
return RTM_NEWVLAN;
case RTM_DELLINK:
return RTM_DELVLAN;
}
return 0;
}
static inline int br_opt_get(const struct net_bridge *br,
enum net_bridge_opts opt)
{
return test_bit(opt, &br->options);
}
int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
struct netlink_ext_ack *extack);
int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt);
int br_boolopt_multi_toggle(struct net_bridge *br,
struct br_boolopt_multi *bm,
struct netlink_ext_ack *extack);
void br_boolopt_multi_get(const struct net_bridge *br,
struct br_boolopt_multi *bm);
void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on);
/* 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)
{
netpoll_send_skb(p->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, unsigned long flags);
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);
int br_fdb_replay(const struct net_device *br_dev, const void *ctx, bool adding,
struct notifier_block *nb);
/* 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_func_t *br_get_rx_handler(const struct net_device *dev);
struct br_frame_type {
__be16 type;
int (*frame_handler)(struct net_bridge_port *port,
struct sk_buff *skb);
struct hlist_node list;
};
void br_add_frame(struct net_bridge *br, struct br_frame_type *ft);
void br_del_frame(struct net_bridge *br, struct br_frame_type *ft);
static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
{
return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev);
}
static inline bool br_rx_handler_check_rtnl(const struct net_device *dev)
{
return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev);
}
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_siocdevprivate(struct net_device *dev, struct ifreq *rq,
void __user *data, int cmd);
int br_ioctl_stub(struct net *net, struct net_bridge *br, unsigned int cmd,
struct ifreq *ifr, void __user *uarg);
/* br_multicast.c */
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
int br_multicast_rcv(struct net_bridge_mcast **brmctx,
struct net_bridge_mcast_port **pmctx,
struct net_bridge_vlan *vlan,
struct sk_buff *skb, u16 vid);
struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx,
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_join_snoopers(struct net_bridge *br);
void br_multicast_leave_snoopers(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,
struct net_bridge_mcast *brmctx,
bool local_rcv, bool local_orig);
int br_multicast_set_router(struct net_bridge_mcast *brmctx, unsigned long val);
int br_multicast_set_port_router(struct net_bridge_mcast_port *pmctx,
unsigned long val);
int br_multicast_set_vlan_router(struct net_bridge_vlan *v, u8 mcast_router);
int br_multicast_toggle(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack);
int br_multicast_set_querier(struct net_bridge_mcast *brmctx, 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_mcast *brmctx,
unsigned long val);
#if IS_ENABLED(CONFIG_IPV6)
int br_multicast_set_mld_version(struct net_bridge_mcast *brmctx,
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,
u8 filter_mode, u8 rt_protocol);
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_mdb_entry *mp,
struct net_bridge_port_group *pg, int type);
void br_rtr_notify(struct net_device *dev, struct net_bridge_mcast_port *pmctx,
int type);
void br_multicast_del_pg(struct net_bridge_mdb_entry *mp,
struct net_bridge_port_group *pg,
struct net_bridge_port_group __rcu **pp);
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);
void br_multicast_host_join(const struct net_bridge_mcast *brmctx,
struct net_bridge_mdb_entry *mp, bool notify);
void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify);
void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg,
u8 filter_mode);
void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp,
struct net_bridge_port_group *sg);
struct net_bridge_group_src *
br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip);
void br_multicast_del_group_src(struct net_bridge_group_src *src,
bool fastleave);
void br_multicast_ctx_init(struct net_bridge *br,
struct net_bridge_vlan *vlan,
struct net_bridge_mcast *brmctx);
void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx);
void br_multicast_port_ctx_init(struct net_bridge_port *port,
struct net_bridge_vlan *vlan,
struct net_bridge_mcast_port *pmctx);
void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx);
void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on);
int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on,
struct netlink_ext_ack *extack);
bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on);
int br_mdb_replay(struct net_device *br_dev, struct net_device *dev,
const void *ctx, bool adding, struct notifier_block *nb,
struct netlink_ext_ack *extack);
int br_rports_fill_info(struct sk_buff *skb,
const struct net_bridge_mcast *brmctx);
int br_multicast_dump_querier_state(struct sk_buff *skb,
const struct net_bridge_mcast *brmctx,
int nest_attr);
size_t br_multicast_querier_state_size(void);
size_t br_rports_size(const struct net_bridge_mcast *brmctx);
void br_multicast_set_query_intvl(struct net_bridge_mcast *brmctx,
unsigned long val);
static inline bool br_group_is_l2(const struct br_ip *group)
{
return group->proto == 0;
}
#define mlock_dereference(X, br) \
rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
static inline struct hlist_node *
br_multicast_get_first_rport_node(struct net_bridge_mcast *brmctx,
struct sk_buff *skb)
{
#if IS_ENABLED(CONFIG_IPV6)
if (skb->protocol == htons(ETH_P_IPV6))
return rcu_dereference(hlist_first_rcu(&brmctx->ip6_mc_router_list));
#endif
return rcu_dereference(hlist_first_rcu(&brmctx->ip4_mc_router_list));
}
static inline struct net_bridge_port *
br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb)
{
struct net_bridge_mcast_port *mctx;
#if IS_ENABLED(CONFIG_IPV6)
if (skb->protocol == htons(ETH_P_IPV6))