v4.19.13 snapshot.
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
new file mode 100644
index 0000000..11ed202
--- /dev/null
+++ b/net/bridge/br_private.h
@@ -0,0 +1,1206 @@
+/*
+ * Linux ethernet bridge
+ *
+ * Authors:
+ * Lennert Buytenhek <buytenh@gnu.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#ifndef _BR_PRIVATE_H
+#define _BR_PRIVATE_H
+
+#include <linux/netdevice.h>
+#include <linux/if_bridge.h>
+#include <linux/netpoll.h>
+#include <linux/u64_stats_sync.h>
+#include <net/route.h>
+#include <net/ip6_fib.h>
+#include <linux/if_vlan.h>
+#include <linux/rhashtable.h>
+#include <linux/refcount.h>
+
+#define BR_HASH_BITS 8
+#define BR_HASH_SIZE (1 << BR_HASH_BITS)
+
+#define BR_HOLD_TIME (1*HZ)
+
+#define BR_PORT_BITS 10
+#define BR_MAX_PORTS (1<<BR_PORT_BITS)
+
+#define BR_VERSION "2.3"
+
+/* Control of forwarding link local multicast */
+#define BR_GROUPFWD_DEFAULT 0
+/* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */
+enum {
+ BR_GROUPFWD_STP = BIT(0),
+ BR_GROUPFWD_MACPAUSE = BIT(1),
+ BR_GROUPFWD_LACP = BIT(2),
+};
+
+#define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \
+ BR_GROUPFWD_LACP)
+/* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
+#define BR_GROUPFWD_8021AD 0xB801u
+
+/* Path to usermode spanning tree program */
+#define BR_STP_PROG "/sbin/bridge-stp"
+
+typedef struct bridge_id bridge_id;
+typedef struct mac_addr mac_addr;
+typedef __u16 port_id;
+
+struct bridge_id
+{
+ unsigned char prio[2];
+ unsigned char addr[ETH_ALEN];
+};
+
+struct mac_addr
+{
+ unsigned char addr[ETH_ALEN];
+};
+
+#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
+/* our own querier */
+struct bridge_mcast_own_query {
+ struct timer_list timer;
+ u32 startup_sent;
+};
+
+/* other querier */
+struct bridge_mcast_other_query {
+ struct timer_list timer;
+ unsigned long delay_time;
+};
+
+/* selected querier */
+struct bridge_mcast_querier {
+ struct br_ip addr;
+ struct net_bridge_port __rcu *port;
+};
+
+/* IGMP/MLD statistics */
+struct bridge_mcast_stats {
+ struct br_mcast_stats mstats;
+ struct u64_stats_sync syncp;
+};
+#endif
+
+struct br_vlan_stats {
+ u64 rx_bytes;
+ u64 rx_packets;
+ u64 tx_bytes;
+ u64 tx_packets;
+ struct u64_stats_sync syncp;
+};
+
+struct br_tunnel_info {
+ __be64 tunnel_id;
+ struct metadata_dst *tunnel_dst;
+};
+
+/**
+ * struct net_bridge_vlan - per-vlan entry
+ *
+ * @vnode: rhashtable member
+ * @vid: VLAN id
+ * @flags: bridge vlan flags
+ * @stats: per-cpu VLAN statistics
+ * @br: if MASTER flag set, this points to a bridge struct
+ * @port: if MASTER flag unset, this points to a port struct
+ * @refcnt: if MASTER flag set, this is bumped for each port referencing it
+ * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
+ * for this VLAN entry
+ * @vlist: sorted list of VLAN entries
+ * @rcu: used for entry destruction
+ *
+ * This structure is shared between the global per-VLAN entries contained in
+ * the bridge rhashtable and the local per-port per-VLAN entries contained in
+ * the port's rhashtable. The union entries should be interpreted depending on
+ * the entry flags that are set.
+ */
+struct net_bridge_vlan {
+ struct rhash_head vnode;
+ struct rhash_head tnode;
+ u16 vid;
+ u16 flags;
+ struct br_vlan_stats __percpu *stats;
+ union {
+ struct net_bridge *br;
+ struct net_bridge_port *port;
+ };
+ union {
+ refcount_t refcnt;
+ struct net_bridge_vlan *brvlan;
+ };
+
+ struct br_tunnel_info tinfo;
+
+ struct list_head vlist;
+
+ struct rcu_head rcu;
+};
+
+/**
+ * struct net_bridge_vlan_group
+ *
+ * @vlan_hash: VLAN entry rhashtable
+ * @vlan_list: sorted VLAN entry list
+ * @num_vlans: number of total VLAN entries
+ * @pvid: PVID VLAN id
+ *
+ * IMPORTANT: Be careful when checking if there're VLAN entries using list
+ * primitives because the bridge can have entries in its list which
+ * are just for global context but not for filtering, i.e. they have
+ * the master flag set but not the brentry flag. If you have to check
+ * if there're "real" entries in the bridge please test @num_vlans
+ */
+struct net_bridge_vlan_group {
+ struct rhashtable vlan_hash;
+ struct rhashtable tunnel_hash;
+ struct list_head vlan_list;
+ u16 num_vlans;
+ u16 pvid;
+};
+
+struct net_bridge_fdb_key {
+ mac_addr addr;
+ u16 vlan_id;
+};
+
+struct net_bridge_fdb_entry {
+ struct rhash_head rhnode;
+ struct net_bridge_port *dst;
+
+ struct net_bridge_fdb_key key;
+ struct hlist_node fdb_node;
+ unsigned char is_local:1,
+ is_static:1,
+ added_by_user:1,
+ added_by_external_learn:1,
+ offloaded:1;
+
+ /* write-heavy members should not affect lookups */
+ unsigned long updated ____cacheline_aligned_in_smp;
+ unsigned long used;
+
+ struct rcu_head rcu;
+};
+
+#define MDB_PG_FLAGS_PERMANENT BIT(0)
+#define MDB_PG_FLAGS_OFFLOAD BIT(1)
+
+struct net_bridge_port_group {
+ struct net_bridge_port *port;
+ struct net_bridge_port_group __rcu *next;
+ struct hlist_node mglist;
+ struct rcu_head rcu;
+ struct timer_list timer;
+ struct br_ip addr;
+ unsigned char 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 host_joined;
+};
+
+struct net_bridge_mdb_htable
+{
+ struct hlist_head *mhash;
+ struct rcu_head rcu;
+ struct net_bridge_mdb_htable *old;
+ u32 size;
+ u32 max;
+ u32 secret;
+ u32 ver;
+};
+
+struct net_bridge_port {
+ struct net_bridge *br;
+ struct net_device *dev;
+ struct list_head list;
+
+ unsigned long flags;
+#ifdef CONFIG_BRIDGE_VLAN_FILTERING
+ struct net_bridge_vlan_group __rcu *vlgrp;
+#endif
+ struct net_bridge_port __rcu *backup_port;
+
+ /* STP */
+ u8 priority;
+ u8 state;
+ u16 port_no;
+ unsigned char topology_change_ack;
+ unsigned char config_pending;
+ port_id port_id;
+ port_id designated_port;
+ bridge_id designated_root;
+ bridge_id designated_bridge;
+ u32 path_cost;
+ u32 designated_cost;
+ unsigned long designated_age;
+
+ struct timer_list forward_delay_timer;
+ struct timer_list hold_timer;
+ struct timer_list message_age_timer;
+ struct kobject kobj;
+ struct rcu_head rcu;
+
+#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
+ struct bridge_mcast_own_query ip4_own_query;
+#if IS_ENABLED(CONFIG_IPV6)
+ struct bridge_mcast_own_query ip6_own_query;
+#endif /* IS_ENABLED(CONFIG_IPV6) */
+ unsigned char multicast_router;
+ struct bridge_mcast_stats __percpu *mcast_stats;
+ struct timer_list multicast_router_timer;
+ struct hlist_head mglist;
+ struct hlist_node rlist;
+#endif
+
+#ifdef CONFIG_SYSFS
+ char sysfs_name[IFNAMSIZ];
+#endif
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ struct netpoll *np;
+#endif
+#ifdef CONFIG_NET_SWITCHDEV
+ int offload_fwd_mark;
+#endif
+ u16 group_fwd_mask;
+ u16 backup_redirected_cnt;
+};
+
+#define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj)
+
+#define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
+#define br_promisc_port(p) ((p)->flags & BR_PROMISC)
+
+#define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
+
+static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
+{
+ return rcu_dereference(dev->rx_handler_data);
+}
+
+static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
+{
+ return br_port_exists(dev) ?
+ rtnl_dereference(dev->rx_handler_data) : NULL;
+}
+
+static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev)
+{
+ return br_port_exists(dev) ?
+ rcu_dereference_rtnl(dev->rx_handler_data) : NULL;
+}
+
+struct net_bridge {
+ spinlock_t lock;
+ spinlock_t hash_lock;
+ struct list_head port_list;
+ struct net_device *dev;
+ struct pcpu_sw_netstats __percpu *stats;
+ /* These fields are accessed on each packet */
+#ifdef CONFIG_BRIDGE_VLAN_FILTERING
+ u8 vlan_enabled;
+ u8 vlan_stats_enabled;
+ __be16 vlan_proto;
+ u16 default_pvid;
+ struct net_bridge_vlan_group __rcu *vlgrp;
+#endif
+
+ struct rhashtable fdb_hash_tbl;
+#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
+ union {
+ struct rtable fake_rtable;
+ struct rt6_info fake_rt6_info;
+ };
+ bool nf_call_iptables;
+ bool nf_call_ip6tables;
+ bool nf_call_arptables;
+#endif
+ u16 group_fwd_mask;
+ u16 group_fwd_mask_required;
+
+ /* STP */
+ bridge_id designated_root;
+ bridge_id bridge_id;
+ u32 root_path_cost;
+ unsigned char topology_change;
+ unsigned char topology_change_detected;
+ u16 root_port;
+ unsigned long max_age;
+ unsigned long hello_time;
+ unsigned long forward_delay;
+ unsigned long ageing_time;
+ unsigned long bridge_max_age;
+ unsigned long bridge_hello_time;
+ unsigned long bridge_forward_delay;
+ unsigned long bridge_ageing_time;
+
+ u8 group_addr[ETH_ALEN];
+ bool group_addr_set;
+
+ enum {
+ BR_NO_STP, /* no spanning tree */
+ BR_KERNEL_STP, /* old STP in kernel */
+ BR_USER_STP, /* new RSTP in userspace */
+ } stp_enabled;
+
+#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
+ unsigned char multicast_router;
+
+ u8 multicast_disabled:1;
+ u8 multicast_querier:1;
+ u8 multicast_query_use_ifaddr:1;
+ u8 has_ipv6_addr:1;
+ u8 multicast_stats_enabled:1;
+
+ u32 hash_elasticity;
+ u32 hash_max;
+
+ u32 multicast_last_member_count;
+ u32 multicast_startup_query_count;
+
+ u8 multicast_igmp_version;
+
+ unsigned long multicast_last_member_interval;
+ unsigned long multicast_membership_interval;
+ unsigned long multicast_querier_interval;
+ unsigned long multicast_query_interval;
+ unsigned long multicast_query_response_interval;
+ unsigned long multicast_startup_query_interval;
+
+ spinlock_t multicast_lock;
+ struct net_bridge_mdb_htable __rcu *mdb;
+ struct hlist_head router_list;
+
+ struct timer_list multicast_router_timer;
+ struct bridge_mcast_other_query ip4_other_query;
+ struct bridge_mcast_own_query ip4_own_query;
+ struct bridge_mcast_querier ip4_querier;
+ struct bridge_mcast_stats __percpu *mcast_stats;
+#if IS_ENABLED(CONFIG_IPV6)
+ struct bridge_mcast_other_query ip6_other_query;
+ struct bridge_mcast_own_query ip6_own_query;
+ struct bridge_mcast_querier ip6_querier;
+ u8 multicast_mld_version;
+#endif /* IS_ENABLED(CONFIG_IPV6) */
+#endif
+
+ struct timer_list hello_timer;
+ struct timer_list tcn_timer;
+ struct timer_list topology_change_timer;
+ struct delayed_work gc_work;
+ struct kobject *ifobj;
+ u32 auto_cnt;
+
+#ifdef CONFIG_NET_SWITCHDEV
+ int offload_fwd_mark;
+#endif
+ bool neigh_suppress_enabled;
+ bool mtu_set_by_user;
+ struct hlist_head fdb_list;
+};
+
+struct br_input_skb_cb {
+ struct net_device *brdev;
+
+#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
+ int igmp;
+ int mrouters_only;
+#endif
+
+ bool proxyarp_replied;
+ bool src_port_isolated;
+
+#ifdef CONFIG_BRIDGE_VLAN_FILTERING
+ bool vlan_filtered;
+#endif
+
+#ifdef CONFIG_NET_SWITCHDEV
+ int offload_fwd_mark;
+#endif
+};
+
+#define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
+
+#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
+# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
+#else
+# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
+#endif
+
+#define br_printk(level, br, format, args...) \
+ printk(level "%s: " format, (br)->dev->name, ##args)
+
+#define br_err(__br, format, args...) \
+ br_printk(KERN_ERR, __br, format, ##args)
+#define br_warn(__br, format, args...) \
+ br_printk(KERN_WARNING, __br, format, ##args)
+#define br_notice(__br, format, args...) \
+ br_printk(KERN_NOTICE, __br, format, ##args)
+#define br_info(__br, format, args...) \
+ br_printk(KERN_INFO, __br, format, ##args)
+
+#define br_debug(br, format, args...) \
+ pr_debug("%s: " format, (br)->dev->name, ##args)
+
+/* called under bridge lock */
+static inline int br_is_root_bridge(const struct net_bridge *br)
+{
+ return !memcmp(&br->bridge_id, &br->designated_root, 8);
+}
+
+/* check if a VLAN entry is global */
+static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
+{
+ return v->flags & BRIDGE_VLAN_INFO_MASTER;
+}
+
+/* check if a VLAN entry is used by the bridge */
+static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
+{
+ return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
+}
+
+/* check if we should use the vlan entry, returns false if it's only context */
+static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
+{
+ if (br_vlan_is_master(v)) {
+ if (br_vlan_is_brentry(v))
+ return true;
+ else
+ return false;
+ }
+
+ return true;
+}
+
+/* br_device.c */
+void br_dev_setup(struct net_device *dev);
+void br_dev_delete(struct net_device *dev, struct list_head *list);
+netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
+ struct sk_buff *skb)
+{
+ struct netpoll *np = p->np;
+
+ if (np)
+ netpoll_send_skb(np, skb);
+}
+
+int br_netpoll_enable(struct net_bridge_port *p);
+void br_netpoll_disable(struct net_bridge_port *p);
+#else
+static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
+ struct sk_buff *skb)
+{
+}
+
+static inline int br_netpoll_enable(struct net_bridge_port *p)
+{
+ return 0;
+}
+
+static inline void br_netpoll_disable(struct net_bridge_port *p)
+{
+}
+#endif
+
+/* br_fdb.c */
+int br_fdb_init(void);
+void br_fdb_fini(void);
+int br_fdb_hash_init(struct net_bridge *br);
+void br_fdb_hash_fini(struct net_bridge *br);
+void br_fdb_flush(struct net_bridge *br);
+void br_fdb_find_delete_local(struct net_bridge *br,
+ const struct net_bridge_port *p,
+ const unsigned char *addr, u16 vid);
+void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
+void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
+void br_fdb_cleanup(struct work_struct *work);
+void br_fdb_delete_by_port(struct net_bridge *br,
+ const struct net_bridge_port *p, u16 vid, int do_all);
+struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br,
+ const unsigned char *addr,
+ __u16 vid);
+int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
+int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
+ unsigned long off);
+int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
+ const unsigned char *addr, u16 vid);
+void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
+ const unsigned char *addr, u16 vid, bool added_by_user);
+
+int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
+ struct net_device *dev, const unsigned char *addr, u16 vid);
+int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
+ const unsigned char *addr, u16 vid, u16 nlh_flags);
+int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
+ struct net_device *dev, struct net_device *fdev, int *idx);
+int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
+void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
+int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
+ const unsigned char *addr, u16 vid,
+ bool swdev_notify);
+int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
+ const unsigned char *addr, u16 vid,
+ bool swdev_notify);
+void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p,
+ const unsigned char *addr, u16 vid);
+
+/* br_forward.c */
+enum br_pkt_type {
+ BR_PKT_UNICAST,
+ BR_PKT_MULTICAST,
+ BR_PKT_BROADCAST
+};
+int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
+void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
+ bool local_rcv, bool local_orig);
+int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
+void br_flood(struct net_bridge *br, struct sk_buff *skb,
+ enum br_pkt_type pkt_type, bool local_rcv, bool local_orig);
+
+/* return true if both source port and dest port are isolated */
+static inline bool br_skb_isolated(const struct net_bridge_port *to,
+ const struct sk_buff *skb)
+{
+ return BR_INPUT_SKB_CB(skb)->src_port_isolated &&
+ (to->flags & BR_ISOLATED);
+}
+
+/* br_if.c */
+void br_port_carrier_check(struct net_bridge_port *p, bool *notified);
+int br_add_bridge(struct net *net, const char *name);
+int br_del_bridge(struct net *net, const char *name);
+int br_add_if(struct net_bridge *br, struct net_device *dev,
+ struct netlink_ext_ack *extack);
+int br_del_if(struct net_bridge *br, struct net_device *dev);
+void br_mtu_auto_adjust(struct net_bridge *br);
+netdev_features_t br_features_recompute(struct net_bridge *br,
+ netdev_features_t features);
+void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
+void br_manage_promisc(struct net_bridge *br);
+int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev);
+
+/* br_input.c */
+int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
+rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
+
+static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
+{
+ return rcu_dereference(dev->rx_handler) == br_handle_frame;
+}
+
+static inline bool br_rx_handler_check_rtnl(const struct net_device *dev)
+{
+ return rcu_dereference_rtnl(dev->rx_handler) == br_handle_frame;
+}
+
+static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
+{
+ return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
+}
+
+static inline struct net_bridge_port *
+br_port_get_check_rtnl(const struct net_device *dev)
+{
+ return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL;
+}
+
+/* br_ioctl.c */
+int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
+int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
+ void __user *arg);
+
+/* br_multicast.c */
+#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
+extern unsigned int br_mdb_rehash_seq;
+int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
+ struct sk_buff *skb, u16 vid);
+struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
+ struct sk_buff *skb, u16 vid);
+int br_multicast_add_port(struct net_bridge_port *port);
+void br_multicast_del_port(struct net_bridge_port *port);
+void br_multicast_enable_port(struct net_bridge_port *port);
+void br_multicast_disable_port(struct net_bridge_port *port);
+void br_multicast_init(struct net_bridge *br);
+void br_multicast_open(struct net_bridge *br);
+void br_multicast_stop(struct net_bridge *br);
+void br_multicast_dev_del(struct net_bridge *br);
+void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
+ struct sk_buff *skb, bool local_rcv, bool local_orig);
+int br_multicast_set_router(struct net_bridge *br, unsigned long val);
+int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
+int br_multicast_toggle(struct net_bridge *br, unsigned long val);
+int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
+int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
+int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val);
+#if IS_ENABLED(CONFIG_IPV6)
+int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val);
+#endif
+struct net_bridge_mdb_entry *
+br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst);
+struct net_bridge_mdb_entry *
+br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port,
+ struct br_ip *group);
+void br_multicast_free_pg(struct rcu_head *head);
+struct net_bridge_port_group *
+br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
+ struct net_bridge_port_group __rcu *next,
+ unsigned char flags, const unsigned char *src);
+void br_mdb_init(void);
+void br_mdb_uninit(void);
+void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
+ struct br_ip *group, int type, u8 flags);
+void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
+ int type);
+void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p,
+ const struct sk_buff *skb, u8 type, u8 dir);
+int br_multicast_init_stats(struct net_bridge *br);
+void br_multicast_uninit_stats(struct net_bridge *br);
+void br_multicast_get_stats(const struct net_bridge *br,
+ const struct net_bridge_port *p,
+ struct br_mcast_stats *dest);
+
+#define mlock_dereference(X, br) \
+ rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
+
+static inline bool br_multicast_is_router(struct net_bridge *br)
+{
+ return br->multicast_router == 2 ||
+ (br->multicast_router == 1 &&
+ timer_pending(&br->multicast_router_timer));
+}
+
+static inline bool
+__br_multicast_querier_exists(struct net_bridge *br,
+ struct bridge_mcast_other_query *querier,
+ const bool is_ipv6)
+{
+ bool own_querier_enabled;
+
+ if (br->multicast_querier) {
+ if (is_ipv6 && !br->has_ipv6_addr)
+ own_querier_enabled = false;
+ else
+ own_querier_enabled = true;
+ } else {
+ own_querier_enabled = false;
+ }
+
+ return time_is_before_jiffies(querier->delay_time) &&
+ (own_querier_enabled || timer_pending(&querier->timer));
+}
+
+static inline bool br_multicast_querier_exists(struct net_bridge *br,
+ struct ethhdr *eth)
+{
+ switch (eth->h_proto) {
+ case (htons(ETH_P_IP)):
+ return __br_multicast_querier_exists(br,
+ &br->ip4_other_query, false);
+#if IS_ENABLED(CONFIG_IPV6)
+ case (htons(ETH_P_IPV6)):
+ return __br_multicast_querier_exists(br,
+ &br->ip6_other_query, true);
+#endif
+ default:
+ return false;
+ }
+}
+
+static inline int br_multicast_igmp_type(const struct sk_buff *skb)
+{
+ return BR_INPUT_SKB_CB(skb)->igmp;
+}
+#else
+static inline int br_multicast_rcv(struct net_bridge *br,
+ struct net_bridge_port *port,
+ struct sk_buff *skb,
+ u16 vid)
+{
+ return 0;
+}
+
+static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
+ struct sk_buff *skb, u16 vid)
+{
+ return NULL;
+}
+
+static inline int br_multicast_add_port(struct net_bridge_port *port)
+{
+ return 0;
+}
+
+static inline void br_multicast_del_port(struct net_bridge_port *port)
+{
+}
+
+static inline void br_multicast_enable_port(struct net_bridge_port *port)
+{
+}
+
+static inline void br_multicast_disable_port(struct net_bridge_port *port)
+{
+}
+
+static inline void br_multicast_init(struct net_bridge *br)
+{
+}
+
+static inline void br_multicast_open(struct net_bridge *br)
+{
+}
+
+static inline void br_multicast_stop(struct net_bridge *br)
+{
+}
+
+static inline void br_multicast_dev_del(struct net_bridge *br)
+{
+}
+
+static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
+ struct sk_buff *skb,
+ bool local_rcv, bool local_orig)
+{
+}
+
+static inline bool br_multicast_is_router(struct net_bridge *br)
+{
+ return false;
+}
+
+static inline bool br_multicast_querier_exists(struct net_bridge *br,
+ struct ethhdr *eth)
+{
+ return false;
+}
+
+static inline void br_mdb_init(void)
+{
+}
+
+static inline void br_mdb_uninit(void)
+{
+}
+
+static inline void br_multicast_count(struct net_bridge *br,
+ const struct net_bridge_port *p,
+ const struct sk_buff *skb,
+ u8 type, u8 dir)
+{
+}
+
+static inline int br_multicast_init_stats(struct net_bridge *br)
+{
+ return 0;
+}
+
+static inline void br_multicast_uninit_stats(struct net_bridge *br)
+{
+}
+
+static inline int br_multicast_igmp_type(const struct sk_buff *skb)
+{
+ return 0;
+}
+#endif
+
+/* br_vlan.c */
+#ifdef CONFIG_BRIDGE_VLAN_FILTERING
+bool br_allowed_ingress(const struct net_bridge *br,
+ struct net_bridge_vlan_group *vg, struct sk_buff *skb,
+ u16 *vid);
+bool br_allowed_egress(struct net_bridge_vlan_group *vg,
+ const struct sk_buff *skb);
+bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
+struct sk_buff *br_handle_vlan(struct net_bridge *br,
+ const struct net_bridge_port *port,
+ struct net_bridge_vlan_group *vg,
+ struct sk_buff *skb);
+int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
+ bool *changed);
+int br_vlan_delete(struct net_bridge *br, u16 vid);
+void br_vlan_flush(struct net_bridge *br);
+struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
+void br_recalculate_fwd_mask(struct net_bridge *br);
+int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
+int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
+int __br_vlan_set_proto(struct net_bridge *br, __be16 proto);
+int br_vlan_set_proto(struct net_bridge *br, unsigned long val);
+int br_vlan_set_stats(struct net_bridge *br, unsigned long val);
+int br_vlan_init(struct net_bridge *br);
+int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val);
+int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid);
+int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
+ bool *changed);
+int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
+void nbp_vlan_flush(struct net_bridge_port *port);
+int nbp_vlan_init(struct net_bridge_port *port);
+int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
+void br_vlan_get_stats(const struct net_bridge_vlan *v,
+ struct br_vlan_stats *stats);
+
+static inline struct net_bridge_vlan_group *br_vlan_group(
+ const struct net_bridge *br)
+{
+ return rtnl_dereference(br->vlgrp);
+}
+
+static inline struct net_bridge_vlan_group *nbp_vlan_group(
+ const struct net_bridge_port *p)
+{
+ return rtnl_dereference(p->vlgrp);
+}
+
+static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
+ const struct net_bridge *br)
+{
+ return rcu_dereference(br->vlgrp);
+}
+
+static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
+ const struct net_bridge_port *p)
+{
+ return rcu_dereference(p->vlgrp);
+}
+
+/* Since bridge now depends on 8021Q module, but the time bridge sees the
+ * skb, the vlan tag will always be present if the frame was tagged.
+ */
+static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
+{
+ int err = 0;
+
+ if (skb_vlan_tag_present(skb)) {
+ *vid = skb_vlan_tag_get(skb) & VLAN_VID_MASK;
+ } else {
+ *vid = 0;
+ err = -EINVAL;
+ }
+
+ return err;
+}
+
+static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
+{
+ if (!vg)
+ return 0;
+
+ smp_rmb();
+ return vg->pvid;
+}
+
+#else
+static inline bool br_allowed_ingress(const struct net_bridge *br,
+ struct net_bridge_vlan_group *vg,
+ struct sk_buff *skb,
+ u16 *vid)
+{
+ return true;
+}
+
+static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
+ const struct sk_buff *skb)
+{
+ return true;
+}
+
+static inline bool br_should_learn(struct net_bridge_port *p,
+ struct sk_buff *skb, u16 *vid)
+{
+ return true;
+}
+
+static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
+ const struct net_bridge_port *port,
+ struct net_bridge_vlan_group *vg,
+ struct sk_buff *skb)
+{
+ return skb;
+}
+
+static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
+ bool *changed)
+{
+ *changed = false;
+ return -EOPNOTSUPP;
+}
+
+static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
+{
+ return -EOPNOTSUPP;
+}
+
+static inline void br_vlan_flush(struct net_bridge *br)
+{
+}
+
+static inline void br_recalculate_fwd_mask(struct net_bridge *br)
+{
+}
+
+static inline int br_vlan_init(struct net_bridge *br)
+{
+ return 0;
+}
+
+static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
+ bool *changed)
+{
+ *changed = false;
+ return -EOPNOTSUPP;
+}
+
+static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
+{
+ return -EOPNOTSUPP;
+}
+
+static inline void nbp_vlan_flush(struct net_bridge_port *port)
+{
+}
+
+static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
+ u16 vid)
+{
+ return NULL;
+}
+
+static inline int nbp_vlan_init(struct net_bridge_port *port)
+{
+ return 0;
+}
+
+static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
+{
+ return 0;
+}
+
+static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
+{
+ return 0;
+}
+
+static inline int __br_vlan_filter_toggle(struct net_bridge *br,
+ unsigned long val)
+{
+ return -EOPNOTSUPP;
+}
+
+static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
+ u32 filter_mask)
+{
+ return 0;
+}
+
+static inline struct net_bridge_vlan_group *br_vlan_group(
+ const struct net_bridge *br)
+{
+ return NULL;
+}
+
+static inline struct net_bridge_vlan_group *nbp_vlan_group(
+ const struct net_bridge_port *p)
+{
+ return NULL;
+}
+
+static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
+ const struct net_bridge *br)
+{
+ return NULL;
+}
+
+static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
+ const struct net_bridge_port *p)
+{
+ return NULL;
+}
+
+static inline void br_vlan_get_stats(const struct net_bridge_vlan *v,
+ struct br_vlan_stats *stats)
+{
+}
+#endif
+
+struct nf_br_ops {
+ int (*br_dev_xmit_hook)(struct sk_buff *skb);
+};
+extern const struct nf_br_ops __rcu *nf_br_ops;
+
+/* br_netfilter.c */
+#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
+int br_nf_core_init(void);
+void br_nf_core_fini(void);
+void br_netfilter_rtable_init(struct net_bridge *);
+#else
+static inline int br_nf_core_init(void) { return 0; }
+static inline void br_nf_core_fini(void) {}
+#define br_netfilter_rtable_init(x)
+#endif
+
+/* br_stp.c */
+void br_set_state(struct net_bridge_port *p, unsigned int state);
+struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
+void br_init_port(struct net_bridge_port *p);
+void br_become_designated_port(struct net_bridge_port *p);
+
+void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
+int br_set_forward_delay(struct net_bridge *br, unsigned long x);
+int br_set_hello_time(struct net_bridge *br, unsigned long x);
+int br_set_max_age(struct net_bridge *br, unsigned long x);
+int __set_ageing_time(struct net_device *dev, unsigned long t);
+int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time);
+
+
+/* br_stp_if.c */
+void br_stp_enable_bridge(struct net_bridge *br);
+void br_stp_disable_bridge(struct net_bridge *br);
+void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
+void br_stp_enable_port(struct net_bridge_port *p);
+void br_stp_disable_port(struct net_bridge_port *p);
+bool br_stp_recalculate_bridge_id(struct net_bridge *br);
+void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
+void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
+int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
+int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
+ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
+
+/* br_stp_bpdu.c */
+struct stp_proto;
+void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
+ struct net_device *dev);
+
+/* br_stp_timer.c */
+void br_stp_timer_init(struct net_bridge *br);
+void br_stp_port_timer_init(struct net_bridge_port *p);
+unsigned long br_timer_value(const struct timer_list *timer);
+
+/* br.c */
+#if IS_ENABLED(CONFIG_ATM_LANE)
+extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
+#endif
+
+/* br_netlink.c */
+extern struct rtnl_link_ops br_link_ops;
+int br_netlink_init(void);
+void br_netlink_fini(void);
+void br_ifinfo_notify(int event, const struct net_bridge *br,
+ const struct net_bridge_port *port);
+int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
+int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
+int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
+ u32 filter_mask, int nlflags);
+
+#ifdef CONFIG_SYSFS
+/* br_sysfs_if.c */
+extern const struct sysfs_ops brport_sysfs_ops;
+int br_sysfs_addif(struct net_bridge_port *p);
+int br_sysfs_renameif(struct net_bridge_port *p);
+
+/* br_sysfs_br.c */
+int br_sysfs_addbr(struct net_device *dev);
+void br_sysfs_delbr(struct net_device *dev);
+
+#else
+
+static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
+static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
+static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
+static inline void br_sysfs_delbr(struct net_device *dev) { return; }
+#endif /* CONFIG_SYSFS */
+
+/* br_switchdev.c */
+#ifdef CONFIG_NET_SWITCHDEV
+int nbp_switchdev_mark_set(struct net_bridge_port *p);
+void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
+ struct sk_buff *skb);
+bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
+ const struct sk_buff *skb);
+int br_switchdev_set_port_flag(struct net_bridge_port *p,
+ unsigned long flags,
+ unsigned long mask);
+void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb,
+ int type);
+int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags);
+int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid);
+
+static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
+{
+ skb->offload_fwd_mark = 0;
+}
+#else
+static inline int nbp_switchdev_mark_set(struct net_bridge_port *p)
+{
+ return 0;
+}
+
+static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
+ struct sk_buff *skb)
+{
+}
+
+static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
+ const struct sk_buff *skb)
+{
+ return true;
+}
+
+static inline int br_switchdev_set_port_flag(struct net_bridge_port *p,
+ unsigned long flags,
+ unsigned long mask)
+{
+ return 0;
+}
+
+static inline int br_switchdev_port_vlan_add(struct net_device *dev,
+ u16 vid, u16 flags)
+{
+ return -EOPNOTSUPP;
+}
+
+static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid)
+{
+ return -EOPNOTSUPP;
+}
+
+static inline void
+br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type)
+{
+}
+
+static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
+{
+}
+#endif /* CONFIG_NET_SWITCHDEV */
+
+/* br_arp_nd_proxy.c */
+void br_recalculate_neigh_suppress_enabled(struct net_bridge *br);
+void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br,
+ u16 vid, struct net_bridge_port *p);
+void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br,
+ u16 vid, struct net_bridge_port *p, struct nd_msg *msg);
+struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m);
+#endif