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0001 /* SPDX-License-Identifier: GPL-2.0-or-later */
0002 /*
0003  *  Linux ethernet bridge
0004  *
0005  *  Authors:
0006  *  Lennert Buytenhek       <buytenh@gnu.org>
0007  */
0008 
0009 #ifndef _BR_PRIVATE_H
0010 #define _BR_PRIVATE_H
0011 
0012 #include <linux/netdevice.h>
0013 #include <linux/if_bridge.h>
0014 #include <linux/netpoll.h>
0015 #include <linux/u64_stats_sync.h>
0016 #include <net/route.h>
0017 #include <net/ip6_fib.h>
0018 #include <linux/if_vlan.h>
0019 #include <linux/rhashtable.h>
0020 #include <linux/refcount.h>
0021 
0022 #define BR_HASH_BITS 8
0023 #define BR_HASH_SIZE (1 << BR_HASH_BITS)
0024 
0025 #define BR_HOLD_TIME (1*HZ)
0026 
0027 #define BR_PORT_BITS    10
0028 #define BR_MAX_PORTS    (1<<BR_PORT_BITS)
0029 
0030 #define BR_MULTICAST_DEFAULT_HASH_MAX 4096
0031 #define BR_MULTICAST_QUERY_INTVL_MIN msecs_to_jiffies(1000)
0032 #define BR_MULTICAST_STARTUP_QUERY_INTVL_MIN BR_MULTICAST_QUERY_INTVL_MIN
0033 
0034 #define BR_HWDOM_MAX BITS_PER_LONG
0035 
0036 #define BR_VERSION  "2.3"
0037 
0038 /* Control of forwarding link local multicast */
0039 #define BR_GROUPFWD_DEFAULT 0
0040 /* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */
0041 enum {
0042     BR_GROUPFWD_STP     = BIT(0),
0043     BR_GROUPFWD_MACPAUSE    = BIT(1),
0044     BR_GROUPFWD_LACP    = BIT(2),
0045 };
0046 
0047 #define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \
0048                 BR_GROUPFWD_LACP)
0049 /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
0050 #define BR_GROUPFWD_8021AD  0xB801u
0051 
0052 /* Path to usermode spanning tree program */
0053 #define BR_STP_PROG "/sbin/bridge-stp"
0054 
0055 #define BR_FDB_NOTIFY_SETTABLE_BITS (FDB_NOTIFY_BIT | FDB_NOTIFY_INACTIVE_BIT)
0056 
0057 typedef struct bridge_id bridge_id;
0058 typedef struct mac_addr mac_addr;
0059 typedef __u16 port_id;
0060 
0061 struct bridge_id {
0062     unsigned char   prio[2];
0063     unsigned char   addr[ETH_ALEN];
0064 };
0065 
0066 struct mac_addr {
0067     unsigned char   addr[ETH_ALEN];
0068 };
0069 
0070 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
0071 /* our own querier */
0072 struct bridge_mcast_own_query {
0073     struct timer_list   timer;
0074     u32         startup_sent;
0075 };
0076 
0077 /* other querier */
0078 struct bridge_mcast_other_query {
0079     struct timer_list       timer;
0080     unsigned long           delay_time;
0081 };
0082 
0083 /* selected querier */
0084 struct bridge_mcast_querier {
0085     struct br_ip addr;
0086     int port_ifidx;
0087     seqcount_spinlock_t seq;
0088 };
0089 
0090 /* IGMP/MLD statistics */
0091 struct bridge_mcast_stats {
0092     struct br_mcast_stats mstats;
0093     struct u64_stats_sync syncp;
0094 };
0095 #endif
0096 
0097 /* net_bridge_mcast_port must be always defined due to forwarding stubs */
0098 struct net_bridge_mcast_port {
0099 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
0100     struct net_bridge_port      *port;
0101     struct net_bridge_vlan      *vlan;
0102 
0103     struct bridge_mcast_own_query   ip4_own_query;
0104     struct timer_list       ip4_mc_router_timer;
0105     struct hlist_node       ip4_rlist;
0106 #if IS_ENABLED(CONFIG_IPV6)
0107     struct bridge_mcast_own_query   ip6_own_query;
0108     struct timer_list       ip6_mc_router_timer;
0109     struct hlist_node       ip6_rlist;
0110 #endif /* IS_ENABLED(CONFIG_IPV6) */
0111     unsigned char           multicast_router;
0112 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */
0113 };
0114 
0115 /* net_bridge_mcast must be always defined due to forwarding stubs */
0116 struct net_bridge_mcast {
0117 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
0118     struct net_bridge       *br;
0119     struct net_bridge_vlan      *vlan;
0120 
0121     u32             multicast_last_member_count;
0122     u32             multicast_startup_query_count;
0123 
0124     u8              multicast_querier;
0125     u8              multicast_igmp_version;
0126     u8              multicast_router;
0127 #if IS_ENABLED(CONFIG_IPV6)
0128     u8              multicast_mld_version;
0129 #endif
0130     unsigned long           multicast_last_member_interval;
0131     unsigned long           multicast_membership_interval;
0132     unsigned long           multicast_querier_interval;
0133     unsigned long           multicast_query_interval;
0134     unsigned long           multicast_query_response_interval;
0135     unsigned long           multicast_startup_query_interval;
0136     struct hlist_head       ip4_mc_router_list;
0137     struct timer_list       ip4_mc_router_timer;
0138     struct bridge_mcast_other_query ip4_other_query;
0139     struct bridge_mcast_own_query   ip4_own_query;
0140     struct bridge_mcast_querier ip4_querier;
0141 #if IS_ENABLED(CONFIG_IPV6)
0142     struct hlist_head       ip6_mc_router_list;
0143     struct timer_list       ip6_mc_router_timer;
0144     struct bridge_mcast_other_query ip6_other_query;
0145     struct bridge_mcast_own_query   ip6_own_query;
0146     struct bridge_mcast_querier ip6_querier;
0147 #endif /* IS_ENABLED(CONFIG_IPV6) */
0148 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */
0149 };
0150 
0151 struct br_tunnel_info {
0152     __be64              tunnel_id;
0153     struct metadata_dst __rcu   *tunnel_dst;
0154 };
0155 
0156 /* private vlan flags */
0157 enum {
0158     BR_VLFLAG_PER_PORT_STATS = BIT(0),
0159     BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1),
0160     BR_VLFLAG_MCAST_ENABLED = BIT(2),
0161     BR_VLFLAG_GLOBAL_MCAST_ENABLED = BIT(3),
0162 };
0163 
0164 /**
0165  * struct net_bridge_vlan - per-vlan entry
0166  *
0167  * @vnode: rhashtable member
0168  * @vid: VLAN id
0169  * @flags: bridge vlan flags
0170  * @priv_flags: private (in-kernel) bridge vlan flags
0171  * @state: STP state (e.g. blocking, learning, forwarding)
0172  * @stats: per-cpu VLAN statistics
0173  * @br: if MASTER flag set, this points to a bridge struct
0174  * @port: if MASTER flag unset, this points to a port struct
0175  * @refcnt: if MASTER flag set, this is bumped for each port referencing it
0176  * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
0177  *          for this VLAN entry
0178  * @br_mcast_ctx: if MASTER flag set, this is the global vlan multicast context
0179  * @port_mcast_ctx: if MASTER flag unset, this is the per-port/vlan multicast
0180  *                  context
0181  * @msti: if MASTER flag set, this holds the VLANs MST instance
0182  * @vlist: sorted list of VLAN entries
0183  * @rcu: used for entry destruction
0184  *
0185  * This structure is shared between the global per-VLAN entries contained in
0186  * the bridge rhashtable and the local per-port per-VLAN entries contained in
0187  * the port's rhashtable. The union entries should be interpreted depending on
0188  * the entry flags that are set.
0189  */
0190 struct net_bridge_vlan {
0191     struct rhash_head       vnode;
0192     struct rhash_head       tnode;
0193     u16             vid;
0194     u16             flags;
0195     u16             priv_flags;
0196     u8              state;
0197     struct pcpu_sw_netstats __percpu *stats;
0198     union {
0199         struct net_bridge   *br;
0200         struct net_bridge_port  *port;
0201     };
0202     union {
0203         refcount_t      refcnt;
0204         struct net_bridge_vlan  *brvlan;
0205     };
0206 
0207     struct br_tunnel_info       tinfo;
0208 
0209     union {
0210         struct net_bridge_mcast     br_mcast_ctx;
0211         struct net_bridge_mcast_port    port_mcast_ctx;
0212     };
0213 
0214     u16             msti;
0215 
0216     struct list_head        vlist;
0217 
0218     struct rcu_head         rcu;
0219 };
0220 
0221 /**
0222  * struct net_bridge_vlan_group
0223  *
0224  * @vlan_hash: VLAN entry rhashtable
0225  * @vlan_list: sorted VLAN entry list
0226  * @num_vlans: number of total VLAN entries
0227  * @pvid: PVID VLAN id
0228  * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking)
0229  *
0230  * IMPORTANT: Be careful when checking if there're VLAN entries using list
0231  *            primitives because the bridge can have entries in its list which
0232  *            are just for global context but not for filtering, i.e. they have
0233  *            the master flag set but not the brentry flag. If you have to check
0234  *            if there're "real" entries in the bridge please test @num_vlans
0235  */
0236 struct net_bridge_vlan_group {
0237     struct rhashtable       vlan_hash;
0238     struct rhashtable       tunnel_hash;
0239     struct list_head        vlan_list;
0240     u16             num_vlans;
0241     u16             pvid;
0242     u8              pvid_state;
0243 };
0244 
0245 /* bridge fdb flags */
0246 enum {
0247     BR_FDB_LOCAL,
0248     BR_FDB_STATIC,
0249     BR_FDB_STICKY,
0250     BR_FDB_ADDED_BY_USER,
0251     BR_FDB_ADDED_BY_EXT_LEARN,
0252     BR_FDB_OFFLOADED,
0253     BR_FDB_NOTIFY,
0254     BR_FDB_NOTIFY_INACTIVE
0255 };
0256 
0257 struct net_bridge_fdb_key {
0258     mac_addr addr;
0259     u16 vlan_id;
0260 };
0261 
0262 struct net_bridge_fdb_entry {
0263     struct rhash_head       rhnode;
0264     struct net_bridge_port      *dst;
0265 
0266     struct net_bridge_fdb_key   key;
0267     struct hlist_node       fdb_node;
0268     unsigned long           flags;
0269 
0270     /* write-heavy members should not affect lookups */
0271     unsigned long           updated ____cacheline_aligned_in_smp;
0272     unsigned long           used;
0273 
0274     struct rcu_head         rcu;
0275 };
0276 
0277 struct net_bridge_fdb_flush_desc {
0278     unsigned long           flags;
0279     unsigned long           flags_mask;
0280     int             port_ifindex;
0281     u16             vlan_id;
0282 };
0283 
0284 #define MDB_PG_FLAGS_PERMANENT  BIT(0)
0285 #define MDB_PG_FLAGS_OFFLOAD    BIT(1)
0286 #define MDB_PG_FLAGS_FAST_LEAVE BIT(2)
0287 #define MDB_PG_FLAGS_STAR_EXCL  BIT(3)
0288 #define MDB_PG_FLAGS_BLOCKED    BIT(4)
0289 
0290 #define PG_SRC_ENT_LIMIT    32
0291 
0292 #define BR_SGRP_F_DELETE    BIT(0)
0293 #define BR_SGRP_F_SEND      BIT(1)
0294 #define BR_SGRP_F_INSTALLED BIT(2)
0295 
0296 struct net_bridge_mcast_gc {
0297     struct hlist_node       gc_node;
0298     void                (*destroy)(struct net_bridge_mcast_gc *gc);
0299 };
0300 
0301 struct net_bridge_group_src {
0302     struct hlist_node       node;
0303 
0304     struct br_ip            addr;
0305     struct net_bridge_port_group    *pg;
0306     u8              flags;
0307     u8              src_query_rexmit_cnt;
0308     struct timer_list       timer;
0309 
0310     struct net_bridge       *br;
0311     struct net_bridge_mcast_gc  mcast_gc;
0312     struct rcu_head         rcu;
0313 };
0314 
0315 struct net_bridge_port_group_sg_key {
0316     struct net_bridge_port      *port;
0317     struct br_ip            addr;
0318 };
0319 
0320 struct net_bridge_port_group {
0321     struct net_bridge_port_group __rcu *next;
0322     struct net_bridge_port_group_sg_key key;
0323     unsigned char           eth_addr[ETH_ALEN] __aligned(2);
0324     unsigned char           flags;
0325     unsigned char           filter_mode;
0326     unsigned char           grp_query_rexmit_cnt;
0327     unsigned char           rt_protocol;
0328 
0329     struct hlist_head       src_list;
0330     unsigned int            src_ents;
0331     struct timer_list       timer;
0332     struct timer_list       rexmit_timer;
0333     struct hlist_node       mglist;
0334     struct rb_root          eht_set_tree;
0335     struct rb_root          eht_host_tree;
0336 
0337     struct rhash_head       rhnode;
0338     struct net_bridge_mcast_gc  mcast_gc;
0339     struct rcu_head         rcu;
0340 };
0341 
0342 struct net_bridge_mdb_entry {
0343     struct rhash_head       rhnode;
0344     struct net_bridge       *br;
0345     struct net_bridge_port_group __rcu *ports;
0346     struct br_ip            addr;
0347     bool                host_joined;
0348 
0349     struct timer_list       timer;
0350     struct hlist_node       mdb_node;
0351 
0352     struct net_bridge_mcast_gc  mcast_gc;
0353     struct rcu_head         rcu;
0354 };
0355 
0356 struct net_bridge_port {
0357     struct net_bridge       *br;
0358     struct net_device       *dev;
0359     netdevice_tracker       dev_tracker;
0360     struct list_head        list;
0361 
0362     unsigned long           flags;
0363 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
0364     struct net_bridge_vlan_group    __rcu *vlgrp;
0365 #endif
0366     struct net_bridge_port      __rcu *backup_port;
0367 
0368     /* STP */
0369     u8              priority;
0370     u8              state;
0371     u16             port_no;
0372     unsigned char           topology_change_ack;
0373     unsigned char           config_pending;
0374     port_id             port_id;
0375     port_id             designated_port;
0376     bridge_id           designated_root;
0377     bridge_id           designated_bridge;
0378     u32             path_cost;
0379     u32             designated_cost;
0380     unsigned long           designated_age;
0381 
0382     struct timer_list       forward_delay_timer;
0383     struct timer_list       hold_timer;
0384     struct timer_list       message_age_timer;
0385     struct kobject          kobj;
0386     struct rcu_head         rcu;
0387 
0388     struct net_bridge_mcast_port    multicast_ctx;
0389 
0390 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
0391     struct bridge_mcast_stats   __percpu *mcast_stats;
0392 
0393     u32             multicast_eht_hosts_limit;
0394     u32             multicast_eht_hosts_cnt;
0395     struct hlist_head       mglist;
0396 #endif
0397 
0398 #ifdef CONFIG_SYSFS
0399     char                sysfs_name[IFNAMSIZ];
0400 #endif
0401 
0402 #ifdef CONFIG_NET_POLL_CONTROLLER
0403     struct netpoll          *np;
0404 #endif
0405 #ifdef CONFIG_NET_SWITCHDEV
0406     /* Identifier used to group ports that share the same switchdev
0407      * hardware domain.
0408      */
0409     int             hwdom;
0410     int             offload_count;
0411     struct netdev_phys_item_id  ppid;
0412 #endif
0413     u16             group_fwd_mask;
0414     u16             backup_redirected_cnt;
0415 
0416     struct bridge_stp_xstats    stp_xstats;
0417 };
0418 
0419 #define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj)
0420 
0421 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
0422 #define br_promisc_port(p) ((p)->flags & BR_PROMISC)
0423 
0424 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
0425 {
0426     return rcu_dereference(dev->rx_handler_data);
0427 }
0428 
0429 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
0430 {
0431     return netif_is_bridge_port(dev) ?
0432         rtnl_dereference(dev->rx_handler_data) : NULL;
0433 }
0434 
0435 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev)
0436 {
0437     return netif_is_bridge_port(dev) ?
0438         rcu_dereference_rtnl(dev->rx_handler_data) : NULL;
0439 }
0440 
0441 enum net_bridge_opts {
0442     BROPT_VLAN_ENABLED,
0443     BROPT_VLAN_STATS_ENABLED,
0444     BROPT_NF_CALL_IPTABLES,
0445     BROPT_NF_CALL_IP6TABLES,
0446     BROPT_NF_CALL_ARPTABLES,
0447     BROPT_GROUP_ADDR_SET,
0448     BROPT_MULTICAST_ENABLED,
0449     BROPT_MULTICAST_QUERY_USE_IFADDR,
0450     BROPT_MULTICAST_STATS_ENABLED,
0451     BROPT_HAS_IPV6_ADDR,
0452     BROPT_NEIGH_SUPPRESS_ENABLED,
0453     BROPT_MTU_SET_BY_USER,
0454     BROPT_VLAN_STATS_PER_PORT,
0455     BROPT_NO_LL_LEARN,
0456     BROPT_VLAN_BRIDGE_BINDING,
0457     BROPT_MCAST_VLAN_SNOOPING_ENABLED,
0458     BROPT_MST_ENABLED,
0459 };
0460 
0461 struct net_bridge {
0462     spinlock_t          lock;
0463     spinlock_t          hash_lock;
0464     struct hlist_head       frame_type_list;
0465     struct net_device       *dev;
0466     unsigned long           options;
0467     /* These fields are accessed on each packet */
0468 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
0469     __be16              vlan_proto;
0470     u16             default_pvid;
0471     struct net_bridge_vlan_group    __rcu *vlgrp;
0472 #endif
0473 
0474     struct rhashtable       fdb_hash_tbl;
0475     struct list_head        port_list;
0476 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
0477     union {
0478         struct rtable       fake_rtable;
0479         struct rt6_info     fake_rt6_info;
0480     };
0481 #endif
0482     u16             group_fwd_mask;
0483     u16             group_fwd_mask_required;
0484 
0485     /* STP */
0486     bridge_id           designated_root;
0487     bridge_id           bridge_id;
0488     unsigned char           topology_change;
0489     unsigned char           topology_change_detected;
0490     u16             root_port;
0491     unsigned long           max_age;
0492     unsigned long           hello_time;
0493     unsigned long           forward_delay;
0494     unsigned long           ageing_time;
0495     unsigned long           bridge_max_age;
0496     unsigned long           bridge_hello_time;
0497     unsigned long           bridge_forward_delay;
0498     unsigned long           bridge_ageing_time;
0499     u32             root_path_cost;
0500 
0501     u8              group_addr[ETH_ALEN];
0502 
0503     enum {
0504         BR_NO_STP,      /* no spanning tree */
0505         BR_KERNEL_STP,      /* old STP in kernel */
0506         BR_USER_STP,        /* new RSTP in userspace */
0507     } stp_enabled;
0508 
0509     struct net_bridge_mcast     multicast_ctx;
0510 
0511 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
0512     struct bridge_mcast_stats   __percpu *mcast_stats;
0513 
0514     u32             hash_max;
0515 
0516     spinlock_t          multicast_lock;
0517 
0518     struct rhashtable       mdb_hash_tbl;
0519     struct rhashtable       sg_port_tbl;
0520 
0521     struct hlist_head       mcast_gc_list;
0522     struct hlist_head       mdb_list;
0523 
0524     struct work_struct      mcast_gc_work;
0525 #endif
0526 
0527     struct timer_list       hello_timer;
0528     struct timer_list       tcn_timer;
0529     struct timer_list       topology_change_timer;
0530     struct delayed_work     gc_work;
0531     struct kobject          *ifobj;
0532     u32             auto_cnt;
0533 
0534 #ifdef CONFIG_NET_SWITCHDEV
0535     /* Counter used to make sure that hardware domains get unique
0536      * identifiers in case a bridge spans multiple switchdev instances.
0537      */
0538     int             last_hwdom;
0539     /* Bit mask of hardware domain numbers in use */
0540     unsigned long           busy_hwdoms;
0541 #endif
0542     struct hlist_head       fdb_list;
0543 
0544 #if IS_ENABLED(CONFIG_BRIDGE_MRP)
0545     struct hlist_head       mrp_list;
0546 #endif
0547 #if IS_ENABLED(CONFIG_BRIDGE_CFM)
0548     struct hlist_head       mep_list;
0549 #endif
0550 };
0551 
0552 struct br_input_skb_cb {
0553     struct net_device *brdev;
0554 
0555     u16 frag_max_size;
0556 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
0557     u8 igmp;
0558     u8 mrouters_only:1;
0559 #endif
0560     u8 proxyarp_replied:1;
0561     u8 src_port_isolated:1;
0562 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
0563     u8 vlan_filtered:1;
0564 #endif
0565 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
0566     u8 br_netfilter_broute:1;
0567 #endif
0568 
0569 #ifdef CONFIG_NET_SWITCHDEV
0570     /* Set if TX data plane offloading is used towards at least one
0571      * hardware domain.
0572      */
0573     u8 tx_fwd_offload:1;
0574     /* The switchdev hardware domain from which this packet was received.
0575      * If skb->offload_fwd_mark was set, then this packet was already
0576      * forwarded by hardware to the other ports in the source hardware
0577      * domain, otherwise it wasn't.
0578      */
0579     int src_hwdom;
0580     /* Bit mask of hardware domains towards this packet has already been
0581      * transmitted using the TX data plane offload.
0582      */
0583     unsigned long fwd_hwdoms;
0584 #endif
0585 };
0586 
0587 #define BR_INPUT_SKB_CB(__skb)  ((struct br_input_skb_cb *)(__skb)->cb)
0588 
0589 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
0590 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (BR_INPUT_SKB_CB(__skb)->mrouters_only)
0591 #else
0592 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (0)
0593 #endif
0594 
0595 #define br_printk(level, br, format, args...)   \
0596     printk(level "%s: " format, (br)->dev->name, ##args)
0597 
0598 #define br_err(__br, format, args...)           \
0599     br_printk(KERN_ERR, __br, format, ##args)
0600 #define br_warn(__br, format, args...)          \
0601     br_printk(KERN_WARNING, __br, format, ##args)
0602 #define br_notice(__br, format, args...)        \
0603     br_printk(KERN_NOTICE, __br, format, ##args)
0604 #define br_info(__br, format, args...)          \
0605     br_printk(KERN_INFO, __br, format, ##args)
0606 
0607 #define br_debug(br, format, args...)           \
0608     pr_debug("%s: " format,  (br)->dev->name, ##args)
0609 
0610 /* called under bridge lock */
0611 static inline int br_is_root_bridge(const struct net_bridge *br)
0612 {
0613     return !memcmp(&br->bridge_id, &br->designated_root, 8);
0614 }
0615 
0616 /* check if a VLAN entry is global */
0617 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
0618 {
0619     return v->flags & BRIDGE_VLAN_INFO_MASTER;
0620 }
0621 
0622 /* check if a VLAN entry is used by the bridge */
0623 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
0624 {
0625     return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
0626 }
0627 
0628 /* check if we should use the vlan entry, returns false if it's only context */
0629 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
0630 {
0631     if (br_vlan_is_master(v)) {
0632         if (br_vlan_is_brentry(v))
0633             return true;
0634         else
0635             return false;
0636     }
0637 
0638     return true;
0639 }
0640 
0641 static inline bool nbp_state_should_learn(const struct net_bridge_port *p)
0642 {
0643     return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING;
0644 }
0645 
0646 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack)
0647 {
0648     bool ret = vid > 0 && vid < VLAN_VID_MASK;
0649 
0650     if (!ret)
0651         NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid");
0652 
0653     return ret;
0654 }
0655 
0656 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur,
0657                        const struct bridge_vlan_info *last,
0658                        struct netlink_ext_ack *extack)
0659 {
0660     /* pvid flag is not allowed in ranges */
0661     if (cur->flags & BRIDGE_VLAN_INFO_PVID) {
0662         NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range");
0663         return false;
0664     }
0665 
0666     /* when cur is the range end, check if:
0667      *  - it has range start flag
0668      *  - range ids are invalid (end is equal to or before start)
0669      */
0670     if (last) {
0671         if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
0672             NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one");
0673             return false;
0674         } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) {
0675             NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing");
0676             return false;
0677         } else if (cur->vid <= last->vid) {
0678             NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id");
0679             return false;
0680         }
0681     }
0682 
0683     /* check for required range flags */
0684     if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN |
0685                 BRIDGE_VLAN_INFO_RANGE_END))) {
0686         NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing");
0687         return false;
0688     }
0689 
0690     return true;
0691 }
0692 
0693 static inline u8 br_vlan_multicast_router(const struct net_bridge_vlan *v)
0694 {
0695     u8 mcast_router = MDB_RTR_TYPE_DISABLED;
0696 
0697 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
0698     if (!br_vlan_is_master(v))
0699         mcast_router = v->port_mcast_ctx.multicast_router;
0700     else
0701         mcast_router = v->br_mcast_ctx.multicast_router;
0702 #endif
0703 
0704     return mcast_router;
0705 }
0706 
0707 static inline int br_afspec_cmd_to_rtm(int cmd)
0708 {
0709     switch (cmd) {
0710     case RTM_SETLINK:
0711         return RTM_NEWVLAN;
0712     case RTM_DELLINK:
0713         return RTM_DELVLAN;
0714     }
0715 
0716     return 0;
0717 }
0718 
0719 static inline int br_opt_get(const struct net_bridge *br,
0720                  enum net_bridge_opts opt)
0721 {
0722     return test_bit(opt, &br->options);
0723 }
0724 
0725 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
0726               struct netlink_ext_ack *extack);
0727 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt);
0728 int br_boolopt_multi_toggle(struct net_bridge *br,
0729                 struct br_boolopt_multi *bm,
0730                 struct netlink_ext_ack *extack);
0731 void br_boolopt_multi_get(const struct net_bridge *br,
0732               struct br_boolopt_multi *bm);
0733 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on);
0734 
0735 /* br_device.c */
0736 void br_dev_setup(struct net_device *dev);
0737 void br_dev_delete(struct net_device *dev, struct list_head *list);
0738 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
0739 #ifdef CONFIG_NET_POLL_CONTROLLER
0740 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
0741                        struct sk_buff *skb)
0742 {
0743     netpoll_send_skb(p->np, skb);
0744 }
0745 
0746 int br_netpoll_enable(struct net_bridge_port *p);
0747 void br_netpoll_disable(struct net_bridge_port *p);
0748 #else
0749 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
0750                        struct sk_buff *skb)
0751 {
0752 }
0753 
0754 static inline int br_netpoll_enable(struct net_bridge_port *p)
0755 {
0756     return 0;
0757 }
0758 
0759 static inline void br_netpoll_disable(struct net_bridge_port *p)
0760 {
0761 }
0762 #endif
0763 
0764 /* br_fdb.c */
0765 #define FDB_FLUSH_IGNORED_NDM_FLAGS (NTF_MASTER | NTF_SELF)
0766 #define FDB_FLUSH_ALLOWED_NDM_STATES (NUD_PERMANENT | NUD_NOARP)
0767 #define FDB_FLUSH_ALLOWED_NDM_FLAGS (NTF_USE | NTF_EXT_LEARNED | \
0768                      NTF_STICKY | NTF_OFFLOADED)
0769 
0770 int br_fdb_init(void);
0771 void br_fdb_fini(void);
0772 int br_fdb_hash_init(struct net_bridge *br);
0773 void br_fdb_hash_fini(struct net_bridge *br);
0774 void br_fdb_flush(struct net_bridge *br,
0775           const struct net_bridge_fdb_flush_desc *desc);
0776 void br_fdb_find_delete_local(struct net_bridge *br,
0777                   const struct net_bridge_port *p,
0778                   const unsigned char *addr, u16 vid);
0779 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
0780 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
0781 void br_fdb_cleanup(struct work_struct *work);
0782 void br_fdb_delete_by_port(struct net_bridge *br,
0783                const struct net_bridge_port *p, u16 vid, int do_all);
0784 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br,
0785                          const unsigned char *addr,
0786                          __u16 vid);
0787 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
0788 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
0789            unsigned long off);
0790 int br_fdb_add_local(struct net_bridge *br, struct net_bridge_port *source,
0791              const unsigned char *addr, u16 vid);
0792 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
0793            const unsigned char *addr, u16 vid, unsigned long flags);
0794 
0795 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
0796           struct net_device *dev, const unsigned char *addr, u16 vid,
0797           struct netlink_ext_ack *extack);
0798 int br_fdb_delete_bulk(struct ndmsg *ndm, struct nlattr *tb[],
0799                struct net_device *dev, u16 vid,
0800                struct netlink_ext_ack *extack);
0801 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
0802            const unsigned char *addr, u16 vid, u16 nlh_flags,
0803            struct netlink_ext_ack *extack);
0804 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
0805         struct net_device *dev, struct net_device *fdev, int *idx);
0806 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev,
0807            const unsigned char *addr, u16 vid, u32 portid, u32 seq,
0808            struct netlink_ext_ack *extack);
0809 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
0810 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
0811 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
0812                   const unsigned char *addr, u16 vid,
0813                   bool swdev_notify);
0814 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
0815                   const unsigned char *addr, u16 vid,
0816                   bool swdev_notify);
0817 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p,
0818               const unsigned char *addr, u16 vid, bool offloaded);
0819 
0820 /* br_forward.c */
0821 enum br_pkt_type {
0822     BR_PKT_UNICAST,
0823     BR_PKT_MULTICAST,
0824     BR_PKT_BROADCAST
0825 };
0826 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
0827 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
0828         bool local_rcv, bool local_orig);
0829 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
0830 void br_flood(struct net_bridge *br, struct sk_buff *skb,
0831           enum br_pkt_type pkt_type, bool local_rcv, bool local_orig);
0832 
0833 /* return true if both source port and dest port are isolated */
0834 static inline bool br_skb_isolated(const struct net_bridge_port *to,
0835                    const struct sk_buff *skb)
0836 {
0837     return BR_INPUT_SKB_CB(skb)->src_port_isolated &&
0838            (to->flags & BR_ISOLATED);
0839 }
0840 
0841 /* br_if.c */
0842 void br_port_carrier_check(struct net_bridge_port *p, bool *notified);
0843 int br_add_bridge(struct net *net, const char *name);
0844 int br_del_bridge(struct net *net, const char *name);
0845 int br_add_if(struct net_bridge *br, struct net_device *dev,
0846           struct netlink_ext_ack *extack);
0847 int br_del_if(struct net_bridge *br, struct net_device *dev);
0848 void br_mtu_auto_adjust(struct net_bridge *br);
0849 netdev_features_t br_features_recompute(struct net_bridge *br,
0850                     netdev_features_t features);
0851 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
0852 void br_manage_promisc(struct net_bridge *br);
0853 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev);
0854 
0855 /* br_input.c */
0856 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
0857 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev);
0858 
0859 struct br_frame_type {
0860     __be16          type;
0861     int         (*frame_handler)(struct net_bridge_port *port,
0862                          struct sk_buff *skb);
0863     struct hlist_node   list;
0864 };
0865 
0866 void br_add_frame(struct net_bridge *br, struct br_frame_type *ft);
0867 void br_del_frame(struct net_bridge *br, struct br_frame_type *ft);
0868 
0869 static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
0870 {
0871     return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev);
0872 }
0873 
0874 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev)
0875 {
0876     return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev);
0877 }
0878 
0879 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
0880 {
0881     return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
0882 }
0883 
0884 static inline struct net_bridge_port *
0885 br_port_get_check_rtnl(const struct net_device *dev)
0886 {
0887     return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL;
0888 }
0889 
0890 /* br_ioctl.c */
0891 int br_dev_siocdevprivate(struct net_device *dev, struct ifreq *rq,
0892               void __user *data, int cmd);
0893 int br_ioctl_stub(struct net *net, struct net_bridge *br, unsigned int cmd,
0894           struct ifreq *ifr, void __user *uarg);
0895 
0896 /* br_multicast.c */
0897 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
0898 int br_multicast_rcv(struct net_bridge_mcast **brmctx,
0899              struct net_bridge_mcast_port **pmctx,
0900              struct net_bridge_vlan *vlan,
0901              struct sk_buff *skb, u16 vid);
0902 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx,
0903                     struct sk_buff *skb, u16 vid);
0904 int br_multicast_add_port(struct net_bridge_port *port);
0905 void br_multicast_del_port(struct net_bridge_port *port);
0906 void br_multicast_enable_port(struct net_bridge_port *port);
0907 void br_multicast_disable_port(struct net_bridge_port *port);
0908 void br_multicast_init(struct net_bridge *br);
0909 void br_multicast_join_snoopers(struct net_bridge *br);
0910 void br_multicast_leave_snoopers(struct net_bridge *br);
0911 void br_multicast_open(struct net_bridge *br);
0912 void br_multicast_stop(struct net_bridge *br);
0913 void br_multicast_dev_del(struct net_bridge *br);
0914 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, struct sk_buff *skb,
0915             struct net_bridge_mcast *brmctx,
0916             bool local_rcv, bool local_orig);
0917 int br_multicast_set_router(struct net_bridge_mcast *brmctx, unsigned long val);
0918 int br_multicast_set_port_router(struct net_bridge_mcast_port *pmctx,
0919                  unsigned long val);
0920 int br_multicast_set_vlan_router(struct net_bridge_vlan *v, u8 mcast_router);
0921 int br_multicast_toggle(struct net_bridge *br, unsigned long val,
0922             struct netlink_ext_ack *extack);
0923 int br_multicast_set_querier(struct net_bridge_mcast *brmctx, unsigned long val);
0924 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
0925 int br_multicast_set_igmp_version(struct net_bridge_mcast *brmctx,
0926                   unsigned long val);
0927 #if IS_ENABLED(CONFIG_IPV6)
0928 int br_multicast_set_mld_version(struct net_bridge_mcast *brmctx,
0929                  unsigned long val);
0930 #endif
0931 struct net_bridge_mdb_entry *
0932 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst);
0933 struct net_bridge_mdb_entry *
0934 br_multicast_new_group(struct net_bridge *br, struct br_ip *group);
0935 struct net_bridge_port_group *
0936 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
0937                 struct net_bridge_port_group __rcu *next,
0938                 unsigned char flags, const unsigned char *src,
0939                 u8 filter_mode, u8 rt_protocol);
0940 int br_mdb_hash_init(struct net_bridge *br);
0941 void br_mdb_hash_fini(struct net_bridge *br);
0942 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp,
0943            struct net_bridge_port_group *pg, int type);
0944 void br_rtr_notify(struct net_device *dev, struct net_bridge_mcast_port *pmctx,
0945            int type);
0946 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp,
0947              struct net_bridge_port_group *pg,
0948              struct net_bridge_port_group __rcu **pp);
0949 void br_multicast_count(struct net_bridge *br,
0950             const struct net_bridge_port *p,
0951             const struct sk_buff *skb, u8 type, u8 dir);
0952 int br_multicast_init_stats(struct net_bridge *br);
0953 void br_multicast_uninit_stats(struct net_bridge *br);
0954 void br_multicast_get_stats(const struct net_bridge *br,
0955                 const struct net_bridge_port *p,
0956                 struct br_mcast_stats *dest);
0957 void br_mdb_init(void);
0958 void br_mdb_uninit(void);
0959 void br_multicast_host_join(const struct net_bridge_mcast *brmctx,
0960                 struct net_bridge_mdb_entry *mp, bool notify);
0961 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify);
0962 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg,
0963                      u8 filter_mode);
0964 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp,
0965                        struct net_bridge_port_group *sg);
0966 struct net_bridge_group_src *
0967 br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip);
0968 void br_multicast_del_group_src(struct net_bridge_group_src *src,
0969                 bool fastleave);
0970 void br_multicast_ctx_init(struct net_bridge *br,
0971                struct net_bridge_vlan *vlan,
0972                struct net_bridge_mcast *brmctx);
0973 void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx);
0974 void br_multicast_port_ctx_init(struct net_bridge_port *port,
0975                 struct net_bridge_vlan *vlan,
0976                 struct net_bridge_mcast_port *pmctx);
0977 void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx);
0978 void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on);
0979 int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on,
0980                       struct netlink_ext_ack *extack);
0981 bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on);
0982 
0983 int br_rports_fill_info(struct sk_buff *skb,
0984             const struct net_bridge_mcast *brmctx);
0985 int br_multicast_dump_querier_state(struct sk_buff *skb,
0986                     const struct net_bridge_mcast *brmctx,
0987                     int nest_attr);
0988 size_t br_multicast_querier_state_size(void);
0989 size_t br_rports_size(const struct net_bridge_mcast *brmctx);
0990 void br_multicast_set_query_intvl(struct net_bridge_mcast *brmctx,
0991                   unsigned long val);
0992 void br_multicast_set_startup_query_intvl(struct net_bridge_mcast *brmctx,
0993                       unsigned long val);
0994 
0995 static inline bool br_group_is_l2(const struct br_ip *group)
0996 {
0997     return group->proto == 0;
0998 }
0999 
1000 #define mlock_dereference(X, br) \
1001     rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
1002 
1003 static inline struct hlist_node *
1004 br_multicast_get_first_rport_node(struct net_bridge_mcast *brmctx,
1005                   struct sk_buff *skb)
1006 {
1007 #if IS_ENABLED(CONFIG_IPV6)
1008     if (skb->protocol == htons(ETH_P_IPV6))
1009         return rcu_dereference(hlist_first_rcu(&brmctx->ip6_mc_router_list));
1010 #endif
1011     return rcu_dereference(hlist_first_rcu(&brmctx->ip4_mc_router_list));
1012 }
1013 
1014 static inline struct net_bridge_port *
1015 br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb)
1016 {
1017     struct net_bridge_mcast_port *mctx;
1018 
1019 #if IS_ENABLED(CONFIG_IPV6)
1020     if (skb->protocol == htons(ETH_P_IPV6))
1021         mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port,
1022                     ip6_rlist);
1023     else
1024 #endif
1025         mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port,
1026                     ip4_rlist);
1027 
1028     if (mctx)
1029         return mctx->port;
1030     else
1031         return NULL;
1032 }
1033 
1034 static inline bool br_ip4_multicast_is_router(struct net_bridge_mcast *brmctx)
1035 {
1036     return timer_pending(&brmctx->ip4_mc_router_timer);
1037 }
1038 
1039 static inline bool br_ip6_multicast_is_router(struct net_bridge_mcast *brmctx)
1040 {
1041 #if IS_ENABLED(CONFIG_IPV6)
1042     return timer_pending(&brmctx->ip6_mc_router_timer);
1043 #else
1044     return false;
1045 #endif
1046 }
1047 
1048 static inline bool
1049 br_multicast_is_router(struct net_bridge_mcast *brmctx, struct sk_buff *skb)
1050 {
1051     switch (brmctx->multicast_router) {
1052     case MDB_RTR_TYPE_PERM:
1053         return true;
1054     case MDB_RTR_TYPE_TEMP_QUERY:
1055         if (skb) {
1056             if (skb->protocol == htons(ETH_P_IP))
1057                 return br_ip4_multicast_is_router(brmctx);
1058             else if (skb->protocol == htons(ETH_P_IPV6))
1059                 return br_ip6_multicast_is_router(brmctx);
1060         } else {
1061             return br_ip4_multicast_is_router(brmctx) ||
1062                    br_ip6_multicast_is_router(brmctx);
1063         }
1064         fallthrough;
1065     default:
1066         return false;
1067     }
1068 }
1069 
1070 static inline bool
1071 __br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1072                   struct bridge_mcast_other_query *querier,
1073                   const bool is_ipv6)
1074 {
1075     bool own_querier_enabled;
1076 
1077     if (brmctx->multicast_querier) {
1078         if (is_ipv6 && !br_opt_get(brmctx->br, BROPT_HAS_IPV6_ADDR))
1079             own_querier_enabled = false;
1080         else
1081             own_querier_enabled = true;
1082     } else {
1083         own_querier_enabled = false;
1084     }
1085 
1086     return time_is_before_jiffies(querier->delay_time) &&
1087            (own_querier_enabled || timer_pending(&querier->timer));
1088 }
1089 
1090 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1091                            struct ethhdr *eth,
1092                            const struct net_bridge_mdb_entry *mdb)
1093 {
1094     switch (eth->h_proto) {
1095     case (htons(ETH_P_IP)):
1096         return __br_multicast_querier_exists(brmctx,
1097             &brmctx->ip4_other_query, false);
1098 #if IS_ENABLED(CONFIG_IPV6)
1099     case (htons(ETH_P_IPV6)):
1100         return __br_multicast_querier_exists(brmctx,
1101             &brmctx->ip6_other_query, true);
1102 #endif
1103     default:
1104         return !!mdb && br_group_is_l2(&mdb->addr);
1105     }
1106 }
1107 
1108 static inline bool br_multicast_is_star_g(const struct br_ip *ip)
1109 {
1110     switch (ip->proto) {
1111     case htons(ETH_P_IP):
1112         return ipv4_is_zeronet(ip->src.ip4);
1113 #if IS_ENABLED(CONFIG_IPV6)
1114     case htons(ETH_P_IPV6):
1115         return ipv6_addr_any(&ip->src.ip6);
1116 #endif
1117     default:
1118         return false;
1119     }
1120 }
1121 
1122 static inline bool
1123 br_multicast_should_handle_mode(const struct net_bridge_mcast *brmctx,
1124                 __be16 proto)
1125 {
1126     switch (proto) {
1127     case htons(ETH_P_IP):
1128         return !!(brmctx->multicast_igmp_version == 3);
1129 #if IS_ENABLED(CONFIG_IPV6)
1130     case htons(ETH_P_IPV6):
1131         return !!(brmctx->multicast_mld_version == 2);
1132 #endif
1133     default:
1134         return false;
1135     }
1136 }
1137 
1138 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
1139 {
1140     return BR_INPUT_SKB_CB(skb)->igmp;
1141 }
1142 
1143 static inline unsigned long br_multicast_lmqt(const struct net_bridge_mcast *brmctx)
1144 {
1145     return brmctx->multicast_last_member_interval *
1146            brmctx->multicast_last_member_count;
1147 }
1148 
1149 static inline unsigned long br_multicast_gmi(const struct net_bridge_mcast *brmctx)
1150 {
1151     return brmctx->multicast_membership_interval;
1152 }
1153 
1154 static inline bool
1155 br_multicast_ctx_is_vlan(const struct net_bridge_mcast *brmctx)
1156 {
1157     return !!brmctx->vlan;
1158 }
1159 
1160 static inline bool
1161 br_multicast_port_ctx_is_vlan(const struct net_bridge_mcast_port *pmctx)
1162 {
1163     return !!pmctx->vlan;
1164 }
1165 
1166 static inline struct net_bridge_mcast *
1167 br_multicast_port_ctx_get_global(const struct net_bridge_mcast_port *pmctx)
1168 {
1169     if (!br_multicast_port_ctx_is_vlan(pmctx))
1170         return &pmctx->port->br->multicast_ctx;
1171     else
1172         return &pmctx->vlan->brvlan->br_mcast_ctx;
1173 }
1174 
1175 static inline bool
1176 br_multicast_ctx_vlan_global_disabled(const struct net_bridge_mcast *brmctx)
1177 {
1178     return br_multicast_ctx_is_vlan(brmctx) &&
1179            (!br_opt_get(brmctx->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) ||
1180         !(brmctx->vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED));
1181 }
1182 
1183 static inline bool
1184 br_multicast_ctx_vlan_disabled(const struct net_bridge_mcast *brmctx)
1185 {
1186     return br_multicast_ctx_is_vlan(brmctx) &&
1187            !(brmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED);
1188 }
1189 
1190 static inline bool
1191 br_multicast_port_ctx_vlan_disabled(const struct net_bridge_mcast_port *pmctx)
1192 {
1193     return br_multicast_port_ctx_is_vlan(pmctx) &&
1194            !(pmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED);
1195 }
1196 
1197 static inline bool
1198 br_multicast_port_ctx_state_disabled(const struct net_bridge_mcast_port *pmctx)
1199 {
1200     return pmctx->port->state == BR_STATE_DISABLED ||
1201            (br_multicast_port_ctx_is_vlan(pmctx) &&
1202         (br_multicast_port_ctx_vlan_disabled(pmctx) ||
1203          pmctx->vlan->state == BR_STATE_DISABLED));
1204 }
1205 
1206 static inline bool
1207 br_multicast_port_ctx_state_stopped(const struct net_bridge_mcast_port *pmctx)
1208 {
1209     return br_multicast_port_ctx_state_disabled(pmctx) ||
1210            pmctx->port->state == BR_STATE_BLOCKING ||
1211            (br_multicast_port_ctx_is_vlan(pmctx) &&
1212         pmctx->vlan->state == BR_STATE_BLOCKING);
1213 }
1214 
1215 static inline bool
1216 br_rports_have_mc_router(const struct net_bridge_mcast *brmctx)
1217 {
1218 #if IS_ENABLED(CONFIG_IPV6)
1219     return !hlist_empty(&brmctx->ip4_mc_router_list) ||
1220            !hlist_empty(&brmctx->ip6_mc_router_list);
1221 #else
1222     return !hlist_empty(&brmctx->ip4_mc_router_list);
1223 #endif
1224 }
1225 
1226 static inline bool
1227 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1,
1228                    const struct net_bridge_mcast *brmctx2)
1229 {
1230     return brmctx1->multicast_igmp_version ==
1231            brmctx2->multicast_igmp_version &&
1232            brmctx1->multicast_last_member_count ==
1233            brmctx2->multicast_last_member_count &&
1234            brmctx1->multicast_startup_query_count ==
1235            brmctx2->multicast_startup_query_count &&
1236            brmctx1->multicast_last_member_interval ==
1237            brmctx2->multicast_last_member_interval &&
1238            brmctx1->multicast_membership_interval ==
1239            brmctx2->multicast_membership_interval &&
1240            brmctx1->multicast_querier_interval ==
1241            brmctx2->multicast_querier_interval &&
1242            brmctx1->multicast_query_interval ==
1243            brmctx2->multicast_query_interval &&
1244            brmctx1->multicast_query_response_interval ==
1245            brmctx2->multicast_query_response_interval &&
1246            brmctx1->multicast_startup_query_interval ==
1247            brmctx2->multicast_startup_query_interval &&
1248            brmctx1->multicast_querier == brmctx2->multicast_querier &&
1249            brmctx1->multicast_router == brmctx2->multicast_router &&
1250            !br_rports_have_mc_router(brmctx1) &&
1251            !br_rports_have_mc_router(brmctx2) &&
1252 #if IS_ENABLED(CONFIG_IPV6)
1253            brmctx1->multicast_mld_version ==
1254            brmctx2->multicast_mld_version &&
1255 #endif
1256            true;
1257 }
1258 
1259 static inline bool
1260 br_multicast_ctx_matches_vlan_snooping(const struct net_bridge_mcast *brmctx)
1261 {
1262     bool vlan_snooping_enabled;
1263 
1264     vlan_snooping_enabled = !!br_opt_get(brmctx->br,
1265                          BROPT_MCAST_VLAN_SNOOPING_ENABLED);
1266 
1267     return !!(vlan_snooping_enabled == br_multicast_ctx_is_vlan(brmctx));
1268 }
1269 #else
1270 static inline int br_multicast_rcv(struct net_bridge_mcast **brmctx,
1271                    struct net_bridge_mcast_port **pmctx,
1272                    struct net_bridge_vlan *vlan,
1273                    struct sk_buff *skb,
1274                    u16 vid)
1275 {
1276     return 0;
1277 }
1278 
1279 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx,
1280                               struct sk_buff *skb, u16 vid)
1281 {
1282     return NULL;
1283 }
1284 
1285 static inline int br_multicast_add_port(struct net_bridge_port *port)
1286 {
1287     return 0;
1288 }
1289 
1290 static inline void br_multicast_del_port(struct net_bridge_port *port)
1291 {
1292 }
1293 
1294 static inline void br_multicast_enable_port(struct net_bridge_port *port)
1295 {
1296 }
1297 
1298 static inline void br_multicast_disable_port(struct net_bridge_port *port)
1299 {
1300 }
1301 
1302 static inline void br_multicast_init(struct net_bridge *br)
1303 {
1304 }
1305 
1306 static inline void br_multicast_join_snoopers(struct net_bridge *br)
1307 {
1308 }
1309 
1310 static inline void br_multicast_leave_snoopers(struct net_bridge *br)
1311 {
1312 }
1313 
1314 static inline void br_multicast_open(struct net_bridge *br)
1315 {
1316 }
1317 
1318 static inline void br_multicast_stop(struct net_bridge *br)
1319 {
1320 }
1321 
1322 static inline void br_multicast_dev_del(struct net_bridge *br)
1323 {
1324 }
1325 
1326 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
1327                       struct sk_buff *skb,
1328                       struct net_bridge_mcast *brmctx,
1329                       bool local_rcv, bool local_orig)
1330 {
1331 }
1332 
1333 static inline bool br_multicast_is_router(struct net_bridge_mcast *brmctx,
1334                       struct sk_buff *skb)
1335 {
1336     return false;
1337 }
1338 
1339 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1340                            struct ethhdr *eth,
1341                            const struct net_bridge_mdb_entry *mdb)
1342 {
1343     return false;
1344 }
1345 
1346 static inline void br_mdb_init(void)
1347 {
1348 }
1349 
1350 static inline void br_mdb_uninit(void)
1351 {
1352 }
1353 
1354 static inline int br_mdb_hash_init(struct net_bridge *br)
1355 {
1356     return 0;
1357 }
1358 
1359 static inline void br_mdb_hash_fini(struct net_bridge *br)
1360 {
1361 }
1362 
1363 static inline void br_multicast_count(struct net_bridge *br,
1364                       const struct net_bridge_port *p,
1365                       const struct sk_buff *skb,
1366                       u8 type, u8 dir)
1367 {
1368 }
1369 
1370 static inline int br_multicast_init_stats(struct net_bridge *br)
1371 {
1372     return 0;
1373 }
1374 
1375 static inline void br_multicast_uninit_stats(struct net_bridge *br)
1376 {
1377 }
1378 
1379 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
1380 {
1381     return 0;
1382 }
1383 
1384 static inline void br_multicast_ctx_init(struct net_bridge *br,
1385                      struct net_bridge_vlan *vlan,
1386                      struct net_bridge_mcast *brmctx)
1387 {
1388 }
1389 
1390 static inline void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx)
1391 {
1392 }
1393 
1394 static inline void br_multicast_port_ctx_init(struct net_bridge_port *port,
1395                           struct net_bridge_vlan *vlan,
1396                           struct net_bridge_mcast_port *pmctx)
1397 {
1398 }
1399 
1400 static inline void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx)
1401 {
1402 }
1403 
1404 static inline void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan,
1405                         bool on)
1406 {
1407 }
1408 
1409 static inline int br_multicast_toggle_vlan_snooping(struct net_bridge *br,
1410                             bool on,
1411                             struct netlink_ext_ack *extack)
1412 {
1413     return -EOPNOTSUPP;
1414 }
1415 
1416 static inline bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan,
1417                            bool on)
1418 {
1419     return false;
1420 }
1421 
1422 static inline bool
1423 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1,
1424                    const struct net_bridge_mcast *brmctx2)
1425 {
1426     return true;
1427 }
1428 #endif
1429 
1430 /* br_vlan.c */
1431 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1432 bool br_allowed_ingress(const struct net_bridge *br,
1433             struct net_bridge_vlan_group *vg, struct sk_buff *skb,
1434             u16 *vid, u8 *state,
1435             struct net_bridge_vlan **vlan);
1436 bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1437                const struct sk_buff *skb);
1438 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
1439 struct sk_buff *br_handle_vlan(struct net_bridge *br,
1440                    const struct net_bridge_port *port,
1441                    struct net_bridge_vlan_group *vg,
1442                    struct sk_buff *skb);
1443 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1444         bool *changed, struct netlink_ext_ack *extack);
1445 int br_vlan_delete(struct net_bridge *br, u16 vid);
1446 void br_vlan_flush(struct net_bridge *br);
1447 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
1448 void br_recalculate_fwd_mask(struct net_bridge *br);
1449 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val,
1450               struct netlink_ext_ack *extack);
1451 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto,
1452             struct netlink_ext_ack *extack);
1453 int br_vlan_set_proto(struct net_bridge *br, unsigned long val,
1454               struct netlink_ext_ack *extack);
1455 int br_vlan_set_stats(struct net_bridge *br, unsigned long val);
1456 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val);
1457 int br_vlan_init(struct net_bridge *br);
1458 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val,
1459                  struct netlink_ext_ack *extack);
1460 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid,
1461                    struct netlink_ext_ack *extack);
1462 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1463          bool *changed, struct netlink_ext_ack *extack);
1464 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
1465 void nbp_vlan_flush(struct net_bridge_port *port);
1466 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack);
1467 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
1468 void br_vlan_get_stats(const struct net_bridge_vlan *v,
1469                struct pcpu_sw_netstats *stats);
1470 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event);
1471 int br_vlan_bridge_event(struct net_device *dev, unsigned long event,
1472              void *ptr);
1473 void br_vlan_rtnl_init(void);
1474 void br_vlan_rtnl_uninit(void);
1475 void br_vlan_notify(const struct net_bridge *br,
1476             const struct net_bridge_port *p,
1477             u16 vid, u16 vid_range,
1478             int cmd);
1479 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1480                  const struct net_bridge_vlan *range_end);
1481 
1482 void br_vlan_fill_forward_path_pvid(struct net_bridge *br,
1483                     struct net_device_path_ctx *ctx,
1484                     struct net_device_path *path);
1485 int br_vlan_fill_forward_path_mode(struct net_bridge *br,
1486                    struct net_bridge_port *dst,
1487                    struct net_device_path *path);
1488 
1489 static inline struct net_bridge_vlan_group *br_vlan_group(
1490                     const struct net_bridge *br)
1491 {
1492     return rtnl_dereference(br->vlgrp);
1493 }
1494 
1495 static inline struct net_bridge_vlan_group *nbp_vlan_group(
1496                     const struct net_bridge_port *p)
1497 {
1498     return rtnl_dereference(p->vlgrp);
1499 }
1500 
1501 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1502                     const struct net_bridge *br)
1503 {
1504     return rcu_dereference(br->vlgrp);
1505 }
1506 
1507 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1508                     const struct net_bridge_port *p)
1509 {
1510     return rcu_dereference(p->vlgrp);
1511 }
1512 
1513 /* Since bridge now depends on 8021Q module, but the time bridge sees the
1514  * skb, the vlan tag will always be present if the frame was tagged.
1515  */
1516 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
1517 {
1518     int err = 0;
1519 
1520     if (skb_vlan_tag_present(skb)) {
1521         *vid = skb_vlan_tag_get_id(skb);
1522     } else {
1523         *vid = 0;
1524         err = -EINVAL;
1525     }
1526 
1527     return err;
1528 }
1529 
1530 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1531 {
1532     if (!vg)
1533         return 0;
1534 
1535     smp_rmb();
1536     return vg->pvid;
1537 }
1538 
1539 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid)
1540 {
1541     return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags;
1542 }
1543 #else
1544 static inline bool br_allowed_ingress(const struct net_bridge *br,
1545                       struct net_bridge_vlan_group *vg,
1546                       struct sk_buff *skb,
1547                       u16 *vid, u8 *state,
1548                       struct net_bridge_vlan **vlan)
1549 
1550 {
1551     *vlan = NULL;
1552     return true;
1553 }
1554 
1555 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1556                      const struct sk_buff *skb)
1557 {
1558     return true;
1559 }
1560 
1561 static inline bool br_should_learn(struct net_bridge_port *p,
1562                    struct sk_buff *skb, u16 *vid)
1563 {
1564     return true;
1565 }
1566 
1567 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
1568                          const struct net_bridge_port *port,
1569                          struct net_bridge_vlan_group *vg,
1570                          struct sk_buff *skb)
1571 {
1572     return skb;
1573 }
1574 
1575 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1576                   bool *changed, struct netlink_ext_ack *extack)
1577 {
1578     *changed = false;
1579     return -EOPNOTSUPP;
1580 }
1581 
1582 static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
1583 {
1584     return -EOPNOTSUPP;
1585 }
1586 
1587 static inline void br_vlan_flush(struct net_bridge *br)
1588 {
1589 }
1590 
1591 static inline void br_recalculate_fwd_mask(struct net_bridge *br)
1592 {
1593 }
1594 
1595 static inline int br_vlan_init(struct net_bridge *br)
1596 {
1597     return 0;
1598 }
1599 
1600 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1601                    bool *changed, struct netlink_ext_ack *extack)
1602 {
1603     *changed = false;
1604     return -EOPNOTSUPP;
1605 }
1606 
1607 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
1608 {
1609     return -EOPNOTSUPP;
1610 }
1611 
1612 static inline void nbp_vlan_flush(struct net_bridge_port *port)
1613 {
1614 }
1615 
1616 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
1617                            u16 vid)
1618 {
1619     return NULL;
1620 }
1621 
1622 static inline int nbp_vlan_init(struct net_bridge_port *port,
1623                 struct netlink_ext_ack *extack)
1624 {
1625     return 0;
1626 }
1627 
1628 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
1629 {
1630     return 0;
1631 }
1632 
1633 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1634 {
1635     return 0;
1636 }
1637 
1638 static inline int br_vlan_filter_toggle(struct net_bridge *br,
1639                     unsigned long val,
1640                     struct netlink_ext_ack *extack)
1641 {
1642     return -EOPNOTSUPP;
1643 }
1644 
1645 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
1646                      u32 filter_mask)
1647 {
1648     return 0;
1649 }
1650 
1651 static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br,
1652                           struct net_device_path_ctx *ctx,
1653                           struct net_device_path *path)
1654 {
1655 }
1656 
1657 static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br,
1658                          struct net_bridge_port *dst,
1659                          struct net_device_path *path)
1660 {
1661     return 0;
1662 }
1663 
1664 static inline struct net_bridge_vlan_group *br_vlan_group(
1665                     const struct net_bridge *br)
1666 {
1667     return NULL;
1668 }
1669 
1670 static inline struct net_bridge_vlan_group *nbp_vlan_group(
1671                     const struct net_bridge_port *p)
1672 {
1673     return NULL;
1674 }
1675 
1676 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1677                     const struct net_bridge *br)
1678 {
1679     return NULL;
1680 }
1681 
1682 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1683                     const struct net_bridge_port *p)
1684 {
1685     return NULL;
1686 }
1687 
1688 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v,
1689                      struct pcpu_sw_netstats *stats)
1690 {
1691 }
1692 
1693 static inline void br_vlan_port_event(struct net_bridge_port *p,
1694                       unsigned long event)
1695 {
1696 }
1697 
1698 static inline int br_vlan_bridge_event(struct net_device *dev,
1699                        unsigned long event, void *ptr)
1700 {
1701     return 0;
1702 }
1703 
1704 static inline void br_vlan_rtnl_init(void)
1705 {
1706 }
1707 
1708 static inline void br_vlan_rtnl_uninit(void)
1709 {
1710 }
1711 
1712 static inline void br_vlan_notify(const struct net_bridge *br,
1713                   const struct net_bridge_port *p,
1714                   u16 vid, u16 vid_range,
1715                   int cmd)
1716 {
1717 }
1718 
1719 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1720                        const struct net_bridge_vlan *range_end)
1721 {
1722     return true;
1723 }
1724 
1725 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid)
1726 {
1727     return 0;
1728 }
1729 
1730 #endif
1731 
1732 /* br_vlan_options.c */
1733 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1734 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr,
1735                const struct net_bridge_vlan *range_end);
1736 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v);
1737 size_t br_vlan_opts_nl_size(void);
1738 int br_vlan_process_options(const struct net_bridge *br,
1739                 const struct net_bridge_port *p,
1740                 struct net_bridge_vlan *range_start,
1741                 struct net_bridge_vlan *range_end,
1742                 struct nlattr **tb,
1743                 struct netlink_ext_ack *extack);
1744 int br_vlan_rtm_process_global_options(struct net_device *dev,
1745                        const struct nlattr *attr,
1746                        int cmd,
1747                        struct netlink_ext_ack *extack);
1748 bool br_vlan_global_opts_can_enter_range(const struct net_bridge_vlan *v_curr,
1749                      const struct net_bridge_vlan *r_end);
1750 bool br_vlan_global_opts_fill(struct sk_buff *skb, u16 vid, u16 vid_range,
1751                   const struct net_bridge_vlan *v_opts);
1752 
1753 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */
1754 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v)
1755 {
1756     return READ_ONCE(v->state);
1757 }
1758 
1759 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state)
1760 {
1761     WRITE_ONCE(v->state, state);
1762 }
1763 
1764 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg)
1765 {
1766     return READ_ONCE(vg->pvid_state);
1767 }
1768 
1769 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg,
1770                       u8 state)
1771 {
1772     WRITE_ONCE(vg->pvid_state, state);
1773 }
1774 
1775 /* learn_allow is true at ingress and false at egress */
1776 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow)
1777 {
1778     switch (state) {
1779     case BR_STATE_LEARNING:
1780         return learn_allow;
1781     case BR_STATE_FORWARDING:
1782         return true;
1783     default:
1784         return false;
1785     }
1786 }
1787 #endif
1788 
1789 /* br_mst.c */
1790 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1791 DECLARE_STATIC_KEY_FALSE(br_mst_used);
1792 static inline bool br_mst_is_enabled(struct net_bridge *br)
1793 {
1794     return static_branch_unlikely(&br_mst_used) &&
1795         br_opt_get(br, BROPT_MST_ENABLED);
1796 }
1797 
1798 int br_mst_set_state(struct net_bridge_port *p, u16 msti, u8 state,
1799              struct netlink_ext_ack *extack);
1800 int br_mst_vlan_set_msti(struct net_bridge_vlan *v, u16 msti);
1801 void br_mst_vlan_init_state(struct net_bridge_vlan *v);
1802 int br_mst_set_enabled(struct net_bridge *br, bool on,
1803                struct netlink_ext_ack *extack);
1804 size_t br_mst_info_size(const struct net_bridge_vlan_group *vg);
1805 int br_mst_fill_info(struct sk_buff *skb,
1806              const struct net_bridge_vlan_group *vg);
1807 int br_mst_process(struct net_bridge_port *p, const struct nlattr *mst_attr,
1808            struct netlink_ext_ack *extack);
1809 #else
1810 static inline bool br_mst_is_enabled(struct net_bridge *br)
1811 {
1812     return false;
1813 }
1814 
1815 static inline int br_mst_set_state(struct net_bridge_port *p, u16 msti,
1816                    u8 state, struct netlink_ext_ack *extack)
1817 {
1818     return -EOPNOTSUPP;
1819 }
1820 
1821 static inline int br_mst_set_enabled(struct net_bridge *br, bool on,
1822                      struct netlink_ext_ack *extack)
1823 {
1824     return -EOPNOTSUPP;
1825 }
1826 
1827 static inline size_t br_mst_info_size(const struct net_bridge_vlan_group *vg)
1828 {
1829     return 0;
1830 }
1831 
1832 static inline int br_mst_fill_info(struct sk_buff *skb,
1833                    const struct net_bridge_vlan_group *vg)
1834 {
1835     return -EOPNOTSUPP;
1836 }
1837 
1838 static inline int br_mst_process(struct net_bridge_port *p,
1839                  const struct nlattr *mst_attr,
1840                  struct netlink_ext_ack *extack)
1841 {
1842     return -EOPNOTSUPP;
1843 }
1844 #endif
1845 
1846 struct nf_br_ops {
1847     int (*br_dev_xmit_hook)(struct sk_buff *skb);
1848 };
1849 extern const struct nf_br_ops __rcu *nf_br_ops;
1850 
1851 /* br_netfilter.c */
1852 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1853 int br_nf_core_init(void);
1854 void br_nf_core_fini(void);
1855 void br_netfilter_rtable_init(struct net_bridge *);
1856 #else
1857 static inline int br_nf_core_init(void) { return 0; }
1858 static inline void br_nf_core_fini(void) {}
1859 #define br_netfilter_rtable_init(x)
1860 #endif
1861 
1862 /* br_stp.c */
1863 void br_set_state(struct net_bridge_port *p, unsigned int state);
1864 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
1865 void br_init_port(struct net_bridge_port *p);
1866 void br_become_designated_port(struct net_bridge_port *p);
1867 
1868 void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
1869 int br_set_forward_delay(struct net_bridge *br, unsigned long x);
1870 int br_set_hello_time(struct net_bridge *br, unsigned long x);
1871 int br_set_max_age(struct net_bridge *br, unsigned long x);
1872 int __set_ageing_time(struct net_device *dev, unsigned long t);
1873 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time);
1874 
1875 
1876 /* br_stp_if.c */
1877 void br_stp_enable_bridge(struct net_bridge *br);
1878 void br_stp_disable_bridge(struct net_bridge *br);
1879 int br_stp_set_enabled(struct net_bridge *br, unsigned long val,
1880                struct netlink_ext_ack *extack);
1881 void br_stp_enable_port(struct net_bridge_port *p);
1882 void br_stp_disable_port(struct net_bridge_port *p);
1883 bool br_stp_recalculate_bridge_id(struct net_bridge *br);
1884 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
1885 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
1886 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
1887 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
1888 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
1889 
1890 /* br_stp_bpdu.c */
1891 struct stp_proto;
1892 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
1893         struct net_device *dev);
1894 
1895 /* br_stp_timer.c */
1896 void br_stp_timer_init(struct net_bridge *br);
1897 void br_stp_port_timer_init(struct net_bridge_port *p);
1898 unsigned long br_timer_value(const struct timer_list *timer);
1899 
1900 /* br.c */
1901 #if IS_ENABLED(CONFIG_ATM_LANE)
1902 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
1903 #endif
1904 
1905 /* br_mrp.c */
1906 #if IS_ENABLED(CONFIG_BRIDGE_MRP)
1907 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
1908          struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
1909 bool br_mrp_enabled(struct net_bridge *br);
1910 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p);
1911 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br);
1912 #else
1913 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
1914                    struct nlattr *attr, int cmd,
1915                    struct netlink_ext_ack *extack)
1916 {
1917     return -EOPNOTSUPP;
1918 }
1919 
1920 static inline bool br_mrp_enabled(struct net_bridge *br)
1921 {
1922     return false;
1923 }
1924 
1925 static inline void br_mrp_port_del(struct net_bridge *br,
1926                    struct net_bridge_port *p)
1927 {
1928 }
1929 
1930 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br)
1931 {
1932     return 0;
1933 }
1934 
1935 #endif
1936 
1937 /* br_cfm.c */
1938 #if IS_ENABLED(CONFIG_BRIDGE_CFM)
1939 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
1940          struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
1941 bool br_cfm_created(struct net_bridge *br);
1942 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p);
1943 int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br);
1944 int br_cfm_status_fill_info(struct sk_buff *skb,
1945                 struct net_bridge *br,
1946                 bool getlink);
1947 int br_cfm_mep_count(struct net_bridge *br, u32 *count);
1948 int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count);
1949 #else
1950 static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
1951                    struct nlattr *attr, int cmd,
1952                    struct netlink_ext_ack *extack)
1953 {
1954     return -EOPNOTSUPP;
1955 }
1956 
1957 static inline bool br_cfm_created(struct net_bridge *br)
1958 {
1959     return false;
1960 }
1961 
1962 static inline void br_cfm_port_del(struct net_bridge *br,
1963                    struct net_bridge_port *p)
1964 {
1965 }
1966 
1967 static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br)
1968 {
1969     return -EOPNOTSUPP;
1970 }
1971 
1972 static inline int br_cfm_status_fill_info(struct sk_buff *skb,
1973                       struct net_bridge *br,
1974                       bool getlink)
1975 {
1976     return -EOPNOTSUPP;
1977 }
1978 
1979 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count)
1980 {
1981     *count = 0;
1982     return -EOPNOTSUPP;
1983 }
1984 
1985 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count)
1986 {
1987     *count = 0;
1988     return -EOPNOTSUPP;
1989 }
1990 #endif
1991 
1992 /* br_netlink.c */
1993 extern struct rtnl_link_ops br_link_ops;
1994 int br_netlink_init(void);
1995 void br_netlink_fini(void);
1996 void br_ifinfo_notify(int event, const struct net_bridge *br,
1997               const struct net_bridge_port *port);
1998 void br_info_notify(int event, const struct net_bridge *br,
1999             const struct net_bridge_port *port, u32 filter);
2000 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags,
2001            struct netlink_ext_ack *extack);
2002 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
2003 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
2004            u32 filter_mask, int nlflags);
2005 int br_process_vlan_info(struct net_bridge *br,
2006              struct net_bridge_port *p, int cmd,
2007              struct bridge_vlan_info *vinfo_curr,
2008              struct bridge_vlan_info **vinfo_last,
2009              bool *changed,
2010              struct netlink_ext_ack *extack);
2011 
2012 #ifdef CONFIG_SYSFS
2013 /* br_sysfs_if.c */
2014 extern const struct sysfs_ops brport_sysfs_ops;
2015 int br_sysfs_addif(struct net_bridge_port *p);
2016 int br_sysfs_renameif(struct net_bridge_port *p);
2017 
2018 /* br_sysfs_br.c */
2019 int br_sysfs_addbr(struct net_device *dev);
2020 void br_sysfs_delbr(struct net_device *dev);
2021 
2022 #else
2023 
2024 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
2025 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
2026 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
2027 static inline void br_sysfs_delbr(struct net_device *dev) { return; }
2028 #endif /* CONFIG_SYSFS */
2029 
2030 /* br_switchdev.c */
2031 #ifdef CONFIG_NET_SWITCHDEV
2032 int br_switchdev_port_offload(struct net_bridge_port *p,
2033                   struct net_device *dev, const void *ctx,
2034                   struct notifier_block *atomic_nb,
2035                   struct notifier_block *blocking_nb,
2036                   bool tx_fwd_offload,
2037                   struct netlink_ext_ack *extack);
2038 
2039 void br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx,
2040                  struct notifier_block *atomic_nb,
2041                  struct notifier_block *blocking_nb);
2042 
2043 bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb);
2044 
2045 void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb);
2046 
2047 void nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p,
2048                          struct sk_buff *skb);
2049 void nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p,
2050                           struct sk_buff *skb);
2051 void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
2052                   struct sk_buff *skb);
2053 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
2054                   const struct sk_buff *skb);
2055 int br_switchdev_set_port_flag(struct net_bridge_port *p,
2056                    unsigned long flags,
2057                    unsigned long mask,
2058                    struct netlink_ext_ack *extack);
2059 void br_switchdev_fdb_notify(struct net_bridge *br,
2060                  const struct net_bridge_fdb_entry *fdb, int type);
2061 void br_switchdev_mdb_notify(struct net_device *dev,
2062                  struct net_bridge_mdb_entry *mp,
2063                  struct net_bridge_port_group *pg,
2064                  int type);
2065 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags,
2066                    bool changed, struct netlink_ext_ack *extack);
2067 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid);
2068 void br_switchdev_init(struct net_bridge *br);
2069 
2070 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
2071 {
2072     skb->offload_fwd_mark = 0;
2073 }
2074 #else
2075 static inline int
2076 br_switchdev_port_offload(struct net_bridge_port *p,
2077               struct net_device *dev, const void *ctx,
2078               struct notifier_block *atomic_nb,
2079               struct notifier_block *blocking_nb,
2080               bool tx_fwd_offload,
2081               struct netlink_ext_ack *extack)
2082 {
2083     return -EOPNOTSUPP;
2084 }
2085 
2086 static inline void
2087 br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx,
2088                 struct notifier_block *atomic_nb,
2089                 struct notifier_block *blocking_nb)
2090 {
2091 }
2092 
2093 static inline bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb)
2094 {
2095     return false;
2096 }
2097 
2098 static inline void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb)
2099 {
2100 }
2101 
2102 static inline void
2103 nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p,
2104                     struct sk_buff *skb)
2105 {
2106 }
2107 
2108 static inline void
2109 nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p,
2110                      struct sk_buff *skb)
2111 {
2112 }
2113 
2114 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
2115                         struct sk_buff *skb)
2116 {
2117 }
2118 
2119 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
2120                         const struct sk_buff *skb)
2121 {
2122     return true;
2123 }
2124 
2125 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p,
2126                          unsigned long flags,
2127                          unsigned long mask,
2128                          struct netlink_ext_ack *extack)
2129 {
2130     return 0;
2131 }
2132 
2133 static inline int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid,
2134                          u16 flags, bool changed,
2135                          struct netlink_ext_ack *extack)
2136 {
2137     return -EOPNOTSUPP;
2138 }
2139 
2140 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid)
2141 {
2142     return -EOPNOTSUPP;
2143 }
2144 
2145 static inline void
2146 br_switchdev_fdb_notify(struct net_bridge *br,
2147             const struct net_bridge_fdb_entry *fdb, int type)
2148 {
2149 }
2150 
2151 static inline void br_switchdev_mdb_notify(struct net_device *dev,
2152                        struct net_bridge_mdb_entry *mp,
2153                        struct net_bridge_port_group *pg,
2154                        int type)
2155 {
2156 }
2157 
2158 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
2159 {
2160 }
2161 
2162 static inline void br_switchdev_init(struct net_bridge *br)
2163 {
2164 }
2165 
2166 #endif /* CONFIG_NET_SWITCHDEV */
2167 
2168 /* br_arp_nd_proxy.c */
2169 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br);
2170 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br,
2171                   u16 vid, struct net_bridge_port *p);
2172 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br,
2173                u16 vid, struct net_bridge_port *p, struct nd_msg *msg);
2174 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m);
2175 #endif
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