net/bridge/br_private.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  *      Linux ethernet bridge
   4  *
   5  *      Authors:
   6  *      Lennert Buytenhek               <buytenh@gnu.org>
   7  */
   8
   9 #ifndef _BR_PRIVATE_H
  10 #define _BR_PRIVATE_H
  11
  12 #include <linux/netdevice.h>
  13 #include <linux/if_bridge.h>
  14 #include <linux/netpoll.h>
  15 #include <linux/u64_stats_sync.h>
  16 #include <net/route.h>
  17 #include <net/ip6_fib.h>
  18 #include <net/pkt_cls.h>
  19 #include <linux/if_vlan.h>
  20 #include <linux/rhashtable.h>
  21 #include <linux/refcount.h>
  22
  23 #define BR_HASH_BITS 8
  24 #define BR_HASH_SIZE (1 << BR_HASH_BITS)
  25
  26 #define BR_HOLD_TIME (1*HZ)
  27
  28 #define BR_PORT_BITS    10
  29 #define BR_MAX_PORTS    (1<<BR_PORT_BITS)
  30
  31 #define BR_MULTICAST_DEFAULT_HASH_MAX 4096
  32 #define BR_MULTICAST_QUERY_INTVL_MIN msecs_to_jiffies(1000)
  33 #define BR_MULTICAST_STARTUP_QUERY_INTVL_MIN BR_MULTICAST_QUERY_INTVL_MIN
  34
  35 #define BR_HWDOM_MAX BITS_PER_LONG
  36
  37 #define BR_VERSION      "2.3"
  38
  39 /* Control of forwarding link local multicast */
  40 #define BR_GROUPFWD_DEFAULT     0
  41 /* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */
  42 enum {
  43         BR_GROUPFWD_STP         = BIT(0),
  44         BR_GROUPFWD_MACPAUSE    = BIT(1),
  45         BR_GROUPFWD_LACP        = BIT(2),
  46 };
  47
  48 #define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \
  49                                 BR_GROUPFWD_LACP)
  50 /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
  51 #define BR_GROUPFWD_8021AD      0xB801u
  52
  53 /* Path to usermode spanning tree program */
  54 #define BR_STP_PROG     "/sbin/bridge-stp"
  55
  56 #define BR_FDB_NOTIFY_SETTABLE_BITS (FDB_NOTIFY_BIT | FDB_NOTIFY_INACTIVE_BIT)
  57
  58 typedef struct bridge_id bridge_id;
  59 typedef struct mac_addr mac_addr;
  60 typedef __u16 port_id;
  61
  62 struct bridge_id {
  63         unsigned char   prio[2];
  64         unsigned char   addr[ETH_ALEN];
  65 };
  66
  67 struct mac_addr {
  68         unsigned char   addr[ETH_ALEN];
  69 };
  70
  71 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
  72 /* our own querier */
  73 struct bridge_mcast_own_query {
  74         struct timer_list       timer;
  75         u32                     startup_sent;
  76 };
  77
  78 /* other querier */
  79 struct bridge_mcast_other_query {
  80         struct timer_list               timer;
  81         unsigned long                   delay_time;
  82 };
  83
  84 /* selected querier */
  85 struct bridge_mcast_querier {
  86         struct br_ip addr;
  87         int port_ifidx;
  88         seqcount_spinlock_t seq;
  89 };
  90
  91 /* IGMP/MLD statistics */
  92 struct bridge_mcast_stats {
  93         struct br_mcast_stats mstats;
  94         struct u64_stats_sync syncp;
  95 };
  96
  97 struct br_mdb_src_entry {
  98         struct br_ip                    addr;
  99 };
 100
 101 struct br_mdb_config {
 102         struct net_bridge               *br;
 103         struct net_bridge_port          *p;
 104         struct br_mdb_entry             *entry;
 105         struct br_ip                    group;
 106         bool                            src_entry;
 107         u8                              filter_mode;
 108         u16                             nlflags;
 109         struct br_mdb_src_entry         *src_entries;
 110         int                             num_src_entries;
 111         u8                              rt_protocol;
 112 };
 113 #endif
 114
 115 /* net_bridge_mcast_port must be always defined due to forwarding stubs */
 116 struct net_bridge_mcast_port {
 117 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 118         struct net_bridge_port          *port;
 119         struct net_bridge_vlan          *vlan;
 120
 121         struct bridge_mcast_own_query   ip4_own_query;
 122         struct timer_list               ip4_mc_router_timer;
 123         struct hlist_node               ip4_rlist;
 124 #if IS_ENABLED(CONFIG_IPV6)
 125         struct bridge_mcast_own_query   ip6_own_query;
 126         struct timer_list               ip6_mc_router_timer;
 127         struct hlist_node               ip6_rlist;
 128 #endif /* IS_ENABLED(CONFIG_IPV6) */
 129         unsigned char                   multicast_router;
 130         u32                             mdb_n_entries;
 131         u32                             mdb_max_entries;
 132 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */
 133 };
 134
 135 /* net_bridge_mcast must be always defined due to forwarding stubs */
 136 struct net_bridge_mcast {
 137 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 138         struct net_bridge               *br;
 139         struct net_bridge_vlan          *vlan;
 140
 141         u32                             multicast_last_member_count;
 142         u32                             multicast_startup_query_count;
 143
 144         u8                              multicast_querier;
 145         u8                              multicast_igmp_version;
 146         u8                              multicast_router;
 147 #if IS_ENABLED(CONFIG_IPV6)
 148         u8                              multicast_mld_version;
 149 #endif
 150         unsigned long                   multicast_last_member_interval;
 151         unsigned long                   multicast_membership_interval;
 152         unsigned long                   multicast_querier_interval;
 153         unsigned long                   multicast_query_interval;
 154         unsigned long                   multicast_query_response_interval;
 155         unsigned long                   multicast_startup_query_interval;
 156         struct hlist_head               ip4_mc_router_list;
 157         struct timer_list               ip4_mc_router_timer;
 158         struct bridge_mcast_other_query ip4_other_query;
 159         struct bridge_mcast_own_query   ip4_own_query;
 160         struct bridge_mcast_querier     ip4_querier;
 161 #if IS_ENABLED(CONFIG_IPV6)
 162         struct hlist_head               ip6_mc_router_list;
 163         struct timer_list               ip6_mc_router_timer;
 164         struct bridge_mcast_other_query ip6_other_query;
 165         struct bridge_mcast_own_query   ip6_own_query;
 166         struct bridge_mcast_querier     ip6_querier;
 167 #endif /* IS_ENABLED(CONFIG_IPV6) */
 168 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */
 169 };
 170
 171 struct br_tunnel_info {
 172         __be64                          tunnel_id;
 173         struct metadata_dst __rcu       *tunnel_dst;
 174 };
 175
 176 /* private vlan flags */
 177 enum {
 178         BR_VLFLAG_PER_PORT_STATS = BIT(0),
 179         BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1),
 180         BR_VLFLAG_MCAST_ENABLED = BIT(2),
 181         BR_VLFLAG_GLOBAL_MCAST_ENABLED = BIT(3),
 182         BR_VLFLAG_NEIGH_SUPPRESS_ENABLED = BIT(4),
 183 };
 184
 185 /**
 186  * struct net_bridge_vlan - per-vlan entry
 187  *
 188  * @vnode: rhashtable member
 189  * @tnode: rhashtable member
 190  * @vid: VLAN id
 191  * @flags: bridge vlan flags
 192  * @priv_flags: private (in-kernel) bridge vlan flags
 193  * @state: STP state (e.g. blocking, learning, forwarding)
 194  * @stats: per-cpu VLAN statistics
 195  * @br: if MASTER flag set, this points to a bridge struct
 196  * @port: if MASTER flag unset, this points to a port struct
 197  * @refcnt: if MASTER flag set, this is bumped for each port referencing it
 198  * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
 199  *          for this VLAN entry
 200  * @tinfo: bridge tunnel info
 201  * @br_mcast_ctx: if MASTER flag set, this is the global vlan multicast context
 202  * @port_mcast_ctx: if MASTER flag unset, this is the per-port/vlan multicast
 203  *                  context
 204  * @msti: if MASTER flag set, this holds the VLANs MST instance
 205  * @vlist: sorted list of VLAN entries
 206  * @rcu: used for entry destruction
 207  *
 208  * This structure is shared between the global per-VLAN entries contained in
 209  * the bridge rhashtable and the local per-port per-VLAN entries contained in
 210  * the port's rhashtable. The union entries should be interpreted depending on
 211  * the entry flags that are set.
 212  */
 213 struct net_bridge_vlan {
 214         struct rhash_head               vnode;
 215         struct rhash_head               tnode;
 216         u16                             vid;
 217         u16                             flags;
 218         u16                             priv_flags;
 219         u8                              state;
 220         struct pcpu_sw_netstats __percpu *stats;
 221         union {
 222                 struct net_bridge       *br;
 223                 struct net_bridge_port  *port;
 224         };
 225         union {
 226                 refcount_t              refcnt;
 227                 struct net_bridge_vlan  *brvlan;
 228         };
 229
 230         struct br_tunnel_info           tinfo;
 231
 232         union {
 233                 struct net_bridge_mcast         br_mcast_ctx;
 234                 struct net_bridge_mcast_port    port_mcast_ctx;
 235         };
 236
 237         u16                             msti;
 238
 239         struct list_head                vlist;
 240
 241         struct rcu_head                 rcu;
 242 };
 243
 244 /**
 245  * struct net_bridge_vlan_group
 246  *
 247  * @vlan_hash: VLAN entry rhashtable
 248  * @vlan_list: sorted VLAN entry list
 249  * @num_vlans: number of total VLAN entries
 250  * @pvid: PVID VLAN id
 251  * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking)
 252  *
 253  * IMPORTANT: Be careful when checking if there're VLAN entries using list
 254  *            primitives because the bridge can have entries in its list which
 255  *            are just for global context but not for filtering, i.e. they have
 256  *            the master flag set but not the brentry flag. If you have to check
 257  *            if there're "real" entries in the bridge please test @num_vlans
 258  */
 259 struct net_bridge_vlan_group {
 260         struct rhashtable               vlan_hash;
 261         struct rhashtable               tunnel_hash;
 262         struct list_head                vlan_list;
 263         u16                             num_vlans;
 264         u16                             pvid;
 265         u8                              pvid_state;
 266 };
 267
 268 /* bridge fdb flags */
 269 enum {
 270         BR_FDB_LOCAL,
 271         BR_FDB_STATIC,
 272         BR_FDB_STICKY,
 273         BR_FDB_ADDED_BY_USER,
 274         BR_FDB_ADDED_BY_EXT_LEARN,
 275         BR_FDB_OFFLOADED,
 276         BR_FDB_NOTIFY,
 277         BR_FDB_NOTIFY_INACTIVE,
 278         BR_FDB_LOCKED,
 279         BR_FDB_DYNAMIC_LEARNED,
 280 };
 281
 282 struct net_bridge_fdb_key {
 283         mac_addr addr;
 284         u16 vlan_id;
 285 };
 286
 287 struct net_bridge_fdb_entry {
 288         struct rhash_head               rhnode;
 289         struct net_bridge_port          *dst;
 290
 291         struct net_bridge_fdb_key       key;
 292         struct hlist_node               fdb_node;
 293         unsigned long                   flags;
 294
 295         /* write-heavy members should not affect lookups */
 296         unsigned long                   updated ____cacheline_aligned_in_smp;
 297         unsigned long                   used;
 298
 299         struct rcu_head                 rcu;
 300 };
 301
 302 struct net_bridge_fdb_flush_desc {
 303         unsigned long                   flags;
 304         unsigned long                   flags_mask;
 305         int                             port_ifindex;
 306         u16                             vlan_id;
 307 };
 308
 309 #define MDB_PG_FLAGS_PERMANENT  BIT(0)
 310 #define MDB_PG_FLAGS_OFFLOAD    BIT(1)
 311 #define MDB_PG_FLAGS_FAST_LEAVE BIT(2)
 312 #define MDB_PG_FLAGS_STAR_EXCL  BIT(3)
 313 #define MDB_PG_FLAGS_BLOCKED    BIT(4)
 314
 315 #define PG_SRC_ENT_LIMIT        32
 316
 317 #define BR_SGRP_F_DELETE        BIT(0)
 318 #define BR_SGRP_F_SEND          BIT(1)
 319 #define BR_SGRP_F_INSTALLED     BIT(2)
 320 #define BR_SGRP_F_USER_ADDED    BIT(3)
 321
 322 struct net_bridge_mcast_gc {
 323         struct hlist_node               gc_node;
 324         void                            (*destroy)(struct net_bridge_mcast_gc *gc);
 325 };
 326
 327 struct net_bridge_group_src {
 328         struct hlist_node               node;
 329
 330         struct br_ip                    addr;
 331         struct net_bridge_port_group    *pg;
 332         u8                              flags;
 333         u8                              src_query_rexmit_cnt;
 334         struct timer_list               timer;
 335
 336         struct net_bridge               *br;
 337         struct net_bridge_mcast_gc      mcast_gc;
 338         struct rcu_head                 rcu;
 339 };
 340
 341 struct net_bridge_port_group_sg_key {
 342         struct net_bridge_port          *port;
 343         struct br_ip                    addr;
 344 };
 345
 346 struct net_bridge_port_group {
 347         struct net_bridge_port_group __rcu *next;
 348         struct net_bridge_port_group_sg_key key;
 349         unsigned char                   eth_addr[ETH_ALEN] __aligned(2);
 350         unsigned char                   flags;
 351         unsigned char                   filter_mode;
 352         unsigned char                   grp_query_rexmit_cnt;
 353         unsigned char                   rt_protocol;
 354
 355         struct hlist_head               src_list;
 356         unsigned int                    src_ents;
 357         struct timer_list               timer;
 358         struct timer_list               rexmit_timer;
 359         struct hlist_node               mglist;
 360         struct rb_root                  eht_set_tree;
 361         struct rb_root                  eht_host_tree;
 362
 363         struct rhash_head               rhnode;
 364         struct net_bridge_mcast_gc      mcast_gc;
 365         struct rcu_head                 rcu;
 366 };
 367
 368 struct net_bridge_mdb_entry {
 369         struct rhash_head               rhnode;
 370         struct net_bridge               *br;
 371         struct net_bridge_port_group __rcu *ports;
 372         struct br_ip                    addr;
 373         bool                            host_joined;
 374
 375         struct timer_list               timer;
 376         struct hlist_node               mdb_node;
 377
 378         struct net_bridge_mcast_gc      mcast_gc;
 379         struct rcu_head                 rcu;
 380 };
 381
 382 struct net_bridge_port {
 383         struct net_bridge               *br;
 384         struct net_device               *dev;
 385         netdevice_tracker               dev_tracker;
 386         struct list_head                list;
 387
 388         unsigned long                   flags;
 389 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 390         struct net_bridge_vlan_group    __rcu *vlgrp;
 391 #endif
 392         struct net_bridge_port          __rcu *backup_port;
 393         u32                             backup_nhid;
 394
 395         /* STP */
 396         u8                              priority;
 397         u8                              state;
 398         u16                             port_no;
 399         unsigned char                   topology_change_ack;
 400         unsigned char                   config_pending;
 401         port_id                         port_id;
 402         port_id                         designated_port;
 403         bridge_id                       designated_root;
 404         bridge_id                       designated_bridge;
 405         u32                             path_cost;
 406         u32                             designated_cost;
 407         unsigned long                   designated_age;
 408
 409         struct timer_list               forward_delay_timer;
 410         struct timer_list               hold_timer;
 411         struct timer_list               message_age_timer;
 412         struct kobject                  kobj;
 413         struct rcu_head                 rcu;
 414
 415         struct net_bridge_mcast_port    multicast_ctx;
 416
 417 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 418         struct bridge_mcast_stats       __percpu *mcast_stats;
 419
 420         u32                             multicast_eht_hosts_limit;
 421         u32                             multicast_eht_hosts_cnt;
 422         struct hlist_head               mglist;
 423 #endif
 424
 425 #ifdef CONFIG_SYSFS
 426         char                            sysfs_name[IFNAMSIZ];
 427 #endif
 428
 429 #ifdef CONFIG_NET_POLL_CONTROLLER
 430         struct netpoll                  *np;
 431 #endif
 432 #ifdef CONFIG_NET_SWITCHDEV
 433         /* Identifier used to group ports that share the same switchdev
 434          * hardware domain.
 435          */
 436         int                             hwdom;
 437         int                             offload_count;
 438         struct netdev_phys_item_id      ppid;
 439 #endif
 440         u16                             group_fwd_mask;
 441         u16                             backup_redirected_cnt;
 442
 443         struct bridge_stp_xstats        stp_xstats;
 444 };
 445
 446 #define kobj_to_brport(obj)     container_of(obj, struct net_bridge_port, kobj)
 447
 448 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
 449 #define br_promisc_port(p) ((p)->flags & BR_PROMISC)
 450
 451 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
 452 {
 453         return rcu_dereference(dev->rx_handler_data);
 454 }
 455
 456 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
 457 {
 458         return netif_is_bridge_port(dev) ?
 459                 rtnl_dereference(dev->rx_handler_data) : NULL;
 460 }
 461
 462 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev)
 463 {
 464         return netif_is_bridge_port(dev) ?
 465                 rcu_dereference_rtnl(dev->rx_handler_data) : NULL;
 466 }
 467
 468 enum net_bridge_opts {
 469         BROPT_VLAN_ENABLED,
 470         BROPT_VLAN_STATS_ENABLED,
 471         BROPT_NF_CALL_IPTABLES,
 472         BROPT_NF_CALL_IP6TABLES,
 473         BROPT_NF_CALL_ARPTABLES,
 474         BROPT_GROUP_ADDR_SET,
 475         BROPT_MULTICAST_ENABLED,
 476         BROPT_MULTICAST_QUERY_USE_IFADDR,
 477         BROPT_MULTICAST_STATS_ENABLED,
 478         BROPT_HAS_IPV6_ADDR,
 479         BROPT_NEIGH_SUPPRESS_ENABLED,
 480         BROPT_MTU_SET_BY_USER,
 481         BROPT_VLAN_STATS_PER_PORT,
 482         BROPT_NO_LL_LEARN,
 483         BROPT_VLAN_BRIDGE_BINDING,
 484         BROPT_MCAST_VLAN_SNOOPING_ENABLED,
 485         BROPT_MST_ENABLED,
 486 };
 487
 488 struct net_bridge {
 489         spinlock_t                      lock;
 490         spinlock_t                      hash_lock;
 491         struct hlist_head               frame_type_list;
 492         struct net_device               *dev;
 493         unsigned long                   options;
 494         /* These fields are accessed on each packet */
 495 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 496         __be16                          vlan_proto;
 497         u16                             default_pvid;
 498         struct net_bridge_vlan_group    __rcu *vlgrp;
 499 #endif
 500
 501         struct rhashtable               fdb_hash_tbl;
 502         struct list_head                port_list;
 503 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
 504         union {
 505                 struct rtable           fake_rtable;
 506                 struct rt6_info         fake_rt6_info;
 507         };
 508 #endif
 509         u16                             group_fwd_mask;
 510         u16                             group_fwd_mask_required;
 511
 512         /* STP */
 513         bridge_id                       designated_root;
 514         bridge_id                       bridge_id;
 515         unsigned char                   topology_change;
 516         unsigned char                   topology_change_detected;
 517         u16                             root_port;
 518         unsigned long                   max_age;
 519         unsigned long                   hello_time;
 520         unsigned long                   forward_delay;
 521         unsigned long                   ageing_time;
 522         unsigned long                   bridge_max_age;
 523         unsigned long                   bridge_hello_time;
 524         unsigned long                   bridge_forward_delay;
 525         unsigned long                   bridge_ageing_time;
 526         u32                             root_path_cost;
 527
 528         u8                              group_addr[ETH_ALEN];
 529
 530         enum {
 531                 BR_NO_STP,              /* no spanning tree */
 532                 BR_KERNEL_STP,          /* old STP in kernel */
 533                 BR_USER_STP,            /* new RSTP in userspace */
 534         } stp_enabled;
 535
 536         struct net_bridge_mcast         multicast_ctx;
 537
 538 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 539         struct bridge_mcast_stats       __percpu *mcast_stats;
 540
 541         u32                             hash_max;
 542
 543         spinlock_t                      multicast_lock;
 544
 545         struct rhashtable               mdb_hash_tbl;
 546         struct rhashtable               sg_port_tbl;
 547
 548         struct hlist_head               mcast_gc_list;
 549         struct hlist_head               mdb_list;
 550
 551         struct work_struct              mcast_gc_work;
 552 #endif
 553
 554         struct timer_list               hello_timer;
 555         struct timer_list               tcn_timer;
 556         struct timer_list               topology_change_timer;
 557         struct delayed_work             gc_work;
 558         struct kobject                  *ifobj;
 559         u32                             auto_cnt;
 560
 561         atomic_t                        fdb_n_learned;
 562         u32                             fdb_max_learned;
 563
 564 #ifdef CONFIG_NET_SWITCHDEV
 565         /* Counter used to make sure that hardware domains get unique
 566          * identifiers in case a bridge spans multiple switchdev instances.
 567          */
 568         int                             last_hwdom;
 569         /* Bit mask of hardware domain numbers in use */
 570         unsigned long                   busy_hwdoms;
 571 #endif
 572         struct hlist_head               fdb_list;
 573
 574 #if IS_ENABLED(CONFIG_BRIDGE_MRP)
 575         struct hlist_head               mrp_list;
 576 #endif
 577 #if IS_ENABLED(CONFIG_BRIDGE_CFM)
 578         struct hlist_head               mep_list;
 579 #endif
 580 };
 581
 582 struct br_input_skb_cb {
 583         struct net_device *brdev;
 584
 585         u16 frag_max_size;
 586 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 587         u8 igmp;
 588         u8 mrouters_only:1;
 589 #endif
 590         u8 proxyarp_replied:1;
 591         u8 src_port_isolated:1;
 592 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 593         u8 vlan_filtered:1;
 594 #endif
 595 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
 596         u8 br_netfilter_broute:1;
 597 #endif
 598
 599 #ifdef CONFIG_NET_SWITCHDEV
 600         /* Set if TX data plane offloading is used towards at least one
 601          * hardware domain.
 602          */
 603         u8 tx_fwd_offload:1;
 604         /* The switchdev hardware domain from which this packet was received.
 605          * If skb->offload_fwd_mark was set, then this packet was already
 606          * forwarded by hardware to the other ports in the source hardware
 607          * domain, otherwise it wasn't.
 608          */
 609         int src_hwdom;
 610         /* Bit mask of hardware domains towards this packet has already been
 611          * transmitted using the TX data plane offload.
 612          */
 613         unsigned long fwd_hwdoms;
 614 #endif
 615
 616         u32 backup_nhid;
 617 };
 618
 619 #define BR_INPUT_SKB_CB(__skb)  ((struct br_input_skb_cb *)(__skb)->cb)
 620
 621 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 622 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (BR_INPUT_SKB_CB(__skb)->mrouters_only)
 623 #else
 624 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (0)
 625 #endif
 626
 627 #define br_printk(level, br, format, args...)   \
 628         printk(level "%s: " format, (br)->dev->name, ##args)
 629
 630 #define br_err(__br, format, args...)                   \
 631         br_printk(KERN_ERR, __br, format, ##args)
 632 #define br_warn(__br, format, args...)                  \
 633         br_printk(KERN_WARNING, __br, format, ##args)
 634 #define br_notice(__br, format, args...)                \
 635         br_printk(KERN_NOTICE, __br, format, ##args)
 636 #define br_info(__br, format, args...)                  \
 637         br_printk(KERN_INFO, __br, format, ##args)
 638
 639 #define br_debug(br, format, args...)                   \
 640         pr_debug("%s: " format,  (br)->dev->name, ##args)
 641
 642 /* called under bridge lock */
 643 static inline int br_is_root_bridge(const struct net_bridge *br)
 644 {
 645         return !memcmp(&br->bridge_id, &br->designated_root, 8);
 646 }
 647
 648 /* check if a VLAN entry is global */
 649 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
 650 {
 651         return v->flags & BRIDGE_VLAN_INFO_MASTER;
 652 }
 653
 654 /* check if a VLAN entry is used by the bridge */
 655 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
 656 {
 657         return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
 658 }
 659
 660 /* check if we should use the vlan entry, returns false if it's only context */
 661 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
 662 {
 663         if (br_vlan_is_master(v)) {
 664                 if (br_vlan_is_brentry(v))
 665                         return true;
 666                 else
 667                         return false;
 668         }
 669
 670         return true;
 671 }
 672
 673 static inline bool nbp_state_should_learn(const struct net_bridge_port *p)
 674 {
 675         return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING;
 676 }
 677
 678 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack)
 679 {
 680         bool ret = vid > 0 && vid < VLAN_VID_MASK;
 681
 682         if (!ret)
 683                 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid");
 684
 685         return ret;
 686 }
 687
 688 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur,
 689                                        const struct bridge_vlan_info *last,
 690                                        struct netlink_ext_ack *extack)
 691 {
 692         /* pvid flag is not allowed in ranges */
 693         if (cur->flags & BRIDGE_VLAN_INFO_PVID) {
 694                 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range");
 695                 return false;
 696         }
 697
 698         /* when cur is the range end, check if:
 699          *  - it has range start flag
 700          *  - range ids are invalid (end is equal to or before start)
 701          */
 702         if (last) {
 703                 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
 704                         NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one");
 705                         return false;
 706                 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) {
 707                         NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing");
 708                         return false;
 709                 } else if (cur->vid <= last->vid) {
 710                         NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id");
 711                         return false;
 712                 }
 713         }
 714
 715         /* check for required range flags */
 716         if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN |
 717                             BRIDGE_VLAN_INFO_RANGE_END))) {
 718                 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing");
 719                 return false;
 720         }
 721
 722         return true;
 723 }
 724
 725 static inline u8 br_vlan_multicast_router(const struct net_bridge_vlan *v)
 726 {
 727         u8 mcast_router = MDB_RTR_TYPE_DISABLED;
 728
 729 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 730         if (!br_vlan_is_master(v))
 731                 mcast_router = v->port_mcast_ctx.multicast_router;
 732         else
 733                 mcast_router = v->br_mcast_ctx.multicast_router;
 734 #endif
 735
 736         return mcast_router;
 737 }
 738
 739 static inline int br_afspec_cmd_to_rtm(int cmd)
 740 {
 741         switch (cmd) {
 742         case RTM_SETLINK:
 743                 return RTM_NEWVLAN;
 744         case RTM_DELLINK:
 745                 return RTM_DELVLAN;
 746         }
 747
 748         return 0;
 749 }
 750
 751 static inline int br_opt_get(const struct net_bridge *br,
 752                              enum net_bridge_opts opt)
 753 {
 754         return test_bit(opt, &br->options);
 755 }
 756
 757 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
 758                       struct netlink_ext_ack *extack);
 759 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt);
 760 int br_boolopt_multi_toggle(struct net_bridge *br,
 761                             struct br_boolopt_multi *bm,
 762                             struct netlink_ext_ack *extack);
 763 void br_boolopt_multi_get(const struct net_bridge *br,
 764                           struct br_boolopt_multi *bm);
 765 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on);
 766
 767 #if IS_ENABLED(CONFIG_NET_TC_SKB_EXT)
 768 static inline void br_tc_skb_miss_set(struct sk_buff *skb, bool miss)
 769 {
 770         struct tc_skb_ext *ext;
 771
 772         if (!tc_skb_ext_tc_enabled())
 773                 return;
 774
 775         ext = skb_ext_find(skb, TC_SKB_EXT);
 776         if (ext) {
 777                 ext->l2_miss = miss;
 778                 return;
 779         }
 780         if (!miss)
 781                 return;
 782         ext = tc_skb_ext_alloc(skb);
 783         if (!ext)
 784                 return;
 785         ext->l2_miss = true;
 786 }
 787 #else
 788 static inline void br_tc_skb_miss_set(struct sk_buff *skb, bool miss)
 789 {
 790 }
 791 #endif
 792
 793 /* br_device.c */
 794 void br_dev_setup(struct net_device *dev);
 795 void br_dev_delete(struct net_device *dev, struct list_head *list);
 796 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
 797 #ifdef CONFIG_NET_POLL_CONTROLLER
 798 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 799                                        struct sk_buff *skb)
 800 {
 801         netpoll_send_skb(p->np, skb);
 802 }
 803
 804 int br_netpoll_enable(struct net_bridge_port *p);
 805 void br_netpoll_disable(struct net_bridge_port *p);
 806 #else
 807 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 808                                        struct sk_buff *skb)
 809 {
 810 }
 811
 812 static inline int br_netpoll_enable(struct net_bridge_port *p)
 813 {
 814         return 0;
 815 }
 816
 817 static inline void br_netpoll_disable(struct net_bridge_port *p)
 818 {
 819 }
 820 #endif
 821
 822 /* br_fdb.c */
 823 #define FDB_FLUSH_IGNORED_NDM_FLAGS (NTF_MASTER | NTF_SELF)
 824 #define FDB_FLUSH_ALLOWED_NDM_STATES (NUD_PERMANENT | NUD_NOARP)
 825 #define FDB_FLUSH_ALLOWED_NDM_FLAGS (NTF_USE | NTF_EXT_LEARNED | \
 826                                      NTF_STICKY | NTF_OFFLOADED)
 827
 828 int br_fdb_init(void);
 829 void br_fdb_fini(void);
 830 int br_fdb_hash_init(struct net_bridge *br);
 831 void br_fdb_hash_fini(struct net_bridge *br);
 832 void br_fdb_flush(struct net_bridge *br,
 833                   const struct net_bridge_fdb_flush_desc *desc);
 834 void br_fdb_find_delete_local(struct net_bridge *br,
 835                               const struct net_bridge_port *p,
 836                               const unsigned char *addr, u16 vid);
 837 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
 838 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
 839 void br_fdb_cleanup(struct work_struct *work);
 840 void br_fdb_delete_by_port(struct net_bridge *br,
 841                            const struct net_bridge_port *p, u16 vid, int do_all);
 842 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br,
 843                                              const unsigned char *addr,
 844                                              __u16 vid);
 845 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
 846 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
 847                    unsigned long off);
 848 int br_fdb_add_local(struct net_bridge *br, struct net_bridge_port *source,
 849                      const unsigned char *addr, u16 vid);
 850 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
 851                    const unsigned char *addr, u16 vid, unsigned long flags);
 852
 853 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
 854                   struct net_device *dev, const unsigned char *addr, u16 vid,
 855                   struct netlink_ext_ack *extack);
 856 int br_fdb_delete_bulk(struct nlmsghdr *nlh, struct net_device *dev,
 857                        struct netlink_ext_ack *extack);
 858 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
 859                const unsigned char *addr, u16 vid, u16 nlh_flags,
 860                struct netlink_ext_ack *extack);
 861 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
 862                 struct net_device *dev, struct net_device *fdev, int *idx);
 863 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev,
 864                const unsigned char *addr, u16 vid, u32 portid, u32 seq,
 865                struct netlink_ext_ack *extack);
 866 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
 867 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
 868 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
 869                               const unsigned char *addr, u16 vid,
 870                               bool locked, bool swdev_notify);
 871 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
 872                               const unsigned char *addr, u16 vid,
 873                               bool swdev_notify);
 874 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p,
 875                           const unsigned char *addr, u16 vid, bool offloaded);
 876
 877 /* br_forward.c */
 878 enum br_pkt_type {
 879         BR_PKT_UNICAST,
 880         BR_PKT_MULTICAST,
 881         BR_PKT_BROADCAST
 882 };
 883 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
 884 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
 885                 bool local_rcv, bool local_orig);
 886 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
 887 void br_flood(struct net_bridge *br, struct sk_buff *skb,
 888               enum br_pkt_type pkt_type, bool local_rcv, bool local_orig,
 889               u16 vid);
 890
 891 /* return true if both source port and dest port are isolated */
 892 static inline bool br_skb_isolated(const struct net_bridge_port *to,
 893                                    const struct sk_buff *skb)
 894 {
 895         return BR_INPUT_SKB_CB(skb)->src_port_isolated &&
 896                (to->flags & BR_ISOLATED);
 897 }
 898
 899 /* br_if.c */
 900 void br_port_carrier_check(struct net_bridge_port *p, bool *notified);
 901 int br_add_bridge(struct net *net, const char *name);
 902 int br_del_bridge(struct net *net, const char *name);
 903 int br_add_if(struct net_bridge *br, struct net_device *dev,
 904               struct netlink_ext_ack *extack);
 905 int br_del_if(struct net_bridge *br, struct net_device *dev);
 906 void br_mtu_auto_adjust(struct net_bridge *br);
 907 netdev_features_t br_features_recompute(struct net_bridge *br,
 908                                         netdev_features_t features);
 909 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
 910 void br_manage_promisc(struct net_bridge *br);
 911 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev);
 912
 913 /* br_input.c */
 914 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
 915 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev);
 916
 917 struct br_frame_type {
 918         __be16                  type;
 919         int                     (*frame_handler)(struct net_bridge_port *port,
 920                                                  struct sk_buff *skb);
 921         struct hlist_node       list;
 922 };
 923
 924 void br_add_frame(struct net_bridge *br, struct br_frame_type *ft);
 925 void br_del_frame(struct net_bridge *br, struct br_frame_type *ft);
 926
 927 static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
 928 {
 929         return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev);
 930 }
 931
 932 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev)
 933 {
 934         return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev);
 935 }
 936
 937 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
 938 {
 939         return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
 940 }
 941
 942 static inline struct net_bridge_port *
 943 br_port_get_check_rtnl(const struct net_device *dev)
 944 {
 945         return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL;
 946 }
 947
 948 /* br_ioctl.c */
 949 int br_dev_siocdevprivate(struct net_device *dev, struct ifreq *rq,
 950                           void __user *data, int cmd);
 951 int br_ioctl_stub(struct net *net, struct net_bridge *br, unsigned int cmd,
 952                   struct ifreq *ifr, void __user *uarg);
 953
 954 /* br_multicast.c */
 955 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 956 int br_multicast_rcv(struct net_bridge_mcast **brmctx,
 957                      struct net_bridge_mcast_port **pmctx,
 958                      struct net_bridge_vlan *vlan,
 959                      struct sk_buff *skb, u16 vid);
 960 struct net_bridge_mdb_entry *
 961 br_mdb_entry_skb_get(struct net_bridge_mcast *brmctx, struct sk_buff *skb,
 962                      u16 vid);
 963 int br_multicast_add_port(struct net_bridge_port *port);
 964 void br_multicast_del_port(struct net_bridge_port *port);
 965 void br_multicast_enable_port(struct net_bridge_port *port);
 966 void br_multicast_disable_port(struct net_bridge_port *port);
 967 void br_multicast_init(struct net_bridge *br);
 968 void br_multicast_join_snoopers(struct net_bridge *br);
 969 void br_multicast_leave_snoopers(struct net_bridge *br);
 970 void br_multicast_open(struct net_bridge *br);
 971 void br_multicast_stop(struct net_bridge *br);
 972 void br_multicast_dev_del(struct net_bridge *br);
 973 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, struct sk_buff *skb,
 974                         struct net_bridge_mcast *brmctx,
 975                         bool local_rcv, bool local_orig);
 976 int br_multicast_set_router(struct net_bridge_mcast *brmctx, unsigned long val);
 977 int br_multicast_set_port_router(struct net_bridge_mcast_port *pmctx,
 978                                  unsigned long val);
 979 int br_multicast_set_vlan_router(struct net_bridge_vlan *v, u8 mcast_router);
 980 int br_multicast_toggle(struct net_bridge *br, unsigned long val,
 981                         struct netlink_ext_ack *extack);
 982 int br_multicast_set_querier(struct net_bridge_mcast *brmctx, unsigned long val);
 983 int br_multicast_set_igmp_version(struct net_bridge_mcast *brmctx,
 984                                   unsigned long val);
 985 #if IS_ENABLED(CONFIG_IPV6)
 986 int br_multicast_set_mld_version(struct net_bridge_mcast *brmctx,
 987                                  unsigned long val);
 988 #endif
 989 struct net_bridge_mdb_entry *
 990 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst);
 991 struct net_bridge_mdb_entry *
 992 br_multicast_new_group(struct net_bridge *br, struct br_ip *group);
 993 struct net_bridge_port_group *
 994 br_multicast_new_port_group(struct net_bridge_port *port,
 995                             const struct br_ip *group,
 996                             struct net_bridge_port_group __rcu *next,
 997                             unsigned char flags, const unsigned char *src,
 998                             u8 filter_mode, u8 rt_protocol,
 999                             struct netlink_ext_ack *extack);
1000 void br_multicast_del_port_group(struct net_bridge_port_group *p);
1001 int br_mdb_hash_init(struct net_bridge *br);
1002 void br_mdb_hash_fini(struct net_bridge *br);
1003 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp,
1004                    struct net_bridge_port_group *pg, int type);
1005 void br_rtr_notify(struct net_device *dev, struct net_bridge_mcast_port *pmctx,
1006                    int type);
1007 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp,
1008                          struct net_bridge_port_group *pg,
1009                          struct net_bridge_port_group __rcu **pp);
1010 void br_multicast_count(struct net_bridge *br,
1011                         const struct net_bridge_port *p,
1012                         const struct sk_buff *skb, u8 type, u8 dir);
1013 int br_multicast_init_stats(struct net_bridge *br);
1014 void br_multicast_uninit_stats(struct net_bridge *br);
1015 void br_multicast_get_stats(const struct net_bridge *br,
1016                             const struct net_bridge_port *p,
1017                             struct br_mcast_stats *dest);
1018 u32 br_multicast_ngroups_get(const struct net_bridge_mcast_port *pmctx);
1019 void br_multicast_ngroups_set_max(struct net_bridge_mcast_port *pmctx, u32 max);
1020 u32 br_multicast_ngroups_get_max(const struct net_bridge_mcast_port *pmctx);
1021 int br_mdb_add(struct net_device *dev, struct nlattr *tb[], u16 nlmsg_flags,
1022                struct netlink_ext_ack *extack);
1023 int br_mdb_del(struct net_device *dev, struct nlattr *tb[],
1024                struct netlink_ext_ack *extack);
1025 int br_mdb_del_bulk(struct net_device *dev, struct nlattr *tb[],
1026                     struct netlink_ext_ack *extack);
1027 int br_mdb_dump(struct net_device *dev, struct sk_buff *skb,
1028                 struct netlink_callback *cb);
1029 int br_mdb_get(struct net_device *dev, struct nlattr *tb[], u32 portid, u32 seq,
1030                struct netlink_ext_ack *extack);
1031 void br_multicast_host_join(const struct net_bridge_mcast *brmctx,
1032                             struct net_bridge_mdb_entry *mp, bool notify);
1033 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify);
1034 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg,
1035                                      u8 filter_mode);
1036 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp,
1037                                        struct net_bridge_port_group *sg);
1038 struct net_bridge_group_src *
1039 br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip);
1040 struct net_bridge_group_src *
1041 br_multicast_new_group_src(struct net_bridge_port_group *pg,
1042                            struct br_ip *src_ip);
1043 void __br_multicast_del_group_src(struct net_bridge_group_src *src);
1044 void br_multicast_del_group_src(struct net_bridge_group_src *src,
1045                                 bool fastleave);
1046 void br_multicast_ctx_init(struct net_bridge *br,
1047                            struct net_bridge_vlan *vlan,
1048                            struct net_bridge_mcast *brmctx);
1049 void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx);
1050 void br_multicast_port_ctx_init(struct net_bridge_port *port,
1051                                 struct net_bridge_vlan *vlan,
1052                                 struct net_bridge_mcast_port *pmctx);
1053 void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx);
1054 void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on);
1055 int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on,
1056                                       struct netlink_ext_ack *extack);
1057 bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on);
1058
1059 int br_rports_fill_info(struct sk_buff *skb,
1060                         const struct net_bridge_mcast *brmctx);
1061 int br_multicast_dump_querier_state(struct sk_buff *skb,
1062                                     const struct net_bridge_mcast *brmctx,
1063                                     int nest_attr);
1064 size_t br_multicast_querier_state_size(void);
1065 size_t br_rports_size(const struct net_bridge_mcast *brmctx);
1066 void br_multicast_set_query_intvl(struct net_bridge_mcast *brmctx,
1067                                   unsigned long val);
1068 void br_multicast_set_startup_query_intvl(struct net_bridge_mcast *brmctx,
1069                                           unsigned long val);
1070
1071 static inline bool br_group_is_l2(const struct br_ip *group)
1072 {
1073         return group->proto == 0;
1074 }
1075
1076 #define mlock_dereference(X, br) \
1077         rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
1078
1079 static inline struct hlist_node *
1080 br_multicast_get_first_rport_node(struct net_bridge_mcast *brmctx,
1081                                   struct sk_buff *skb)
1082 {
1083 #if IS_ENABLED(CONFIG_IPV6)
1084         if (skb->protocol == htons(ETH_P_IPV6))
1085                 return rcu_dereference(hlist_first_rcu(&brmctx->ip6_mc_router_list));
1086 #endif
1087         return rcu_dereference(hlist_first_rcu(&brmctx->ip4_mc_router_list));
1088 }
1089
1090 static inline struct net_bridge_port *
1091 br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb)
1092 {
1093         struct net_bridge_mcast_port *mctx;
1094
1095 #if IS_ENABLED(CONFIG_IPV6)
1096         if (skb->protocol == htons(ETH_P_IPV6))
1097                 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port,
1098                                         ip6_rlist);
1099         else
1100 #endif
1101                 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port,
1102                                         ip4_rlist);
1103
1104         if (mctx)
1105                 return mctx->port;
1106         else
1107                 return NULL;
1108 }
1109
1110 static inline bool br_ip4_multicast_is_router(struct net_bridge_mcast *brmctx)
1111 {
1112         return timer_pending(&brmctx->ip4_mc_router_timer);
1113 }
1114
1115 static inline bool br_ip6_multicast_is_router(struct net_bridge_mcast *brmctx)
1116 {
1117 #if IS_ENABLED(CONFIG_IPV6)
1118         return timer_pending(&brmctx->ip6_mc_router_timer);
1119 #else
1120         return false;
1121 #endif
1122 }
1123
1124 static inline bool
1125 br_multicast_is_router(struct net_bridge_mcast *brmctx, struct sk_buff *skb)
1126 {
1127         switch (brmctx->multicast_router) {
1128         case MDB_RTR_TYPE_PERM:
1129                 return true;
1130         case MDB_RTR_TYPE_TEMP_QUERY:
1131                 if (skb) {
1132                         if (skb->protocol == htons(ETH_P_IP))
1133                                 return br_ip4_multicast_is_router(brmctx);
1134                         else if (skb->protocol == htons(ETH_P_IPV6))
1135                                 return br_ip6_multicast_is_router(brmctx);
1136                 } else {
1137                         return br_ip4_multicast_is_router(brmctx) ||
1138                                br_ip6_multicast_is_router(brmctx);
1139                 }
1140                 fallthrough;
1141         default:
1142                 return false;
1143         }
1144 }
1145
1146 static inline bool
1147 __br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1148                               struct bridge_mcast_other_query *querier,
1149                               const bool is_ipv6)
1150 {
1151         bool own_querier_enabled;
1152
1153         if (brmctx->multicast_querier) {
1154                 if (is_ipv6 && !br_opt_get(brmctx->br, BROPT_HAS_IPV6_ADDR))
1155                         own_querier_enabled = false;
1156                 else
1157                         own_querier_enabled = true;
1158         } else {
1159                 own_querier_enabled = false;
1160         }
1161
1162         return time_is_before_jiffies(querier->delay_time) &&
1163                (own_querier_enabled || timer_pending(&querier->timer));
1164 }
1165
1166 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1167                                                struct ethhdr *eth,
1168                                                const struct net_bridge_mdb_entry *mdb)
1169 {
1170         switch (eth->h_proto) {
1171         case (htons(ETH_P_IP)):
1172                 return __br_multicast_querier_exists(brmctx,
1173                         &brmctx->ip4_other_query, false);
1174 #if IS_ENABLED(CONFIG_IPV6)
1175         case (htons(ETH_P_IPV6)):
1176                 return __br_multicast_querier_exists(brmctx,
1177                         &brmctx->ip6_other_query, true);
1178 #endif
1179         default:
1180                 return !!mdb && br_group_is_l2(&mdb->addr);
1181         }
1182 }
1183
1184 static inline bool br_multicast_is_star_g(const struct br_ip *ip)
1185 {
1186         switch (ip->proto) {
1187         case htons(ETH_P_IP):
1188                 return ipv4_is_zeronet(ip->src.ip4);
1189 #if IS_ENABLED(CONFIG_IPV6)
1190         case htons(ETH_P_IPV6):
1191                 return ipv6_addr_any(&ip->src.ip6);
1192 #endif
1193         default:
1194                 return false;
1195         }
1196 }
1197
1198 static inline bool
1199 br_multicast_should_handle_mode(const struct net_bridge_mcast *brmctx,
1200                                 __be16 proto)
1201 {
1202         switch (proto) {
1203         case htons(ETH_P_IP):
1204                 return !!(brmctx->multicast_igmp_version == 3);
1205 #if IS_ENABLED(CONFIG_IPV6)
1206         case htons(ETH_P_IPV6):
1207                 return !!(brmctx->multicast_mld_version == 2);
1208 #endif
1209         default:
1210                 return false;
1211         }
1212 }
1213
1214 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
1215 {
1216         return BR_INPUT_SKB_CB(skb)->igmp;
1217 }
1218
1219 static inline unsigned long br_multicast_lmqt(const struct net_bridge_mcast *brmctx)
1220 {
1221         return brmctx->multicast_last_member_interval *
1222                brmctx->multicast_last_member_count;
1223 }
1224
1225 static inline unsigned long br_multicast_gmi(const struct net_bridge_mcast *brmctx)
1226 {
1227         return brmctx->multicast_membership_interval;
1228 }
1229
1230 static inline bool
1231 br_multicast_ctx_is_vlan(const struct net_bridge_mcast *brmctx)
1232 {
1233         return !!brmctx->vlan;
1234 }
1235
1236 static inline bool
1237 br_multicast_port_ctx_is_vlan(const struct net_bridge_mcast_port *pmctx)
1238 {
1239         return !!pmctx->vlan;
1240 }
1241
1242 static inline struct net_bridge_mcast *
1243 br_multicast_port_ctx_get_global(const struct net_bridge_mcast_port *pmctx)
1244 {
1245         if (!br_multicast_port_ctx_is_vlan(pmctx))
1246                 return &pmctx->port->br->multicast_ctx;
1247         else
1248                 return &pmctx->vlan->brvlan->br_mcast_ctx;
1249 }
1250
1251 static inline bool
1252 br_multicast_ctx_vlan_global_disabled(const struct net_bridge_mcast *brmctx)
1253 {
1254         return br_multicast_ctx_is_vlan(brmctx) &&
1255                (!br_opt_get(brmctx->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) ||
1256                 !(brmctx->vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED));
1257 }
1258
1259 static inline bool
1260 br_multicast_ctx_vlan_disabled(const struct net_bridge_mcast *brmctx)
1261 {
1262         return br_multicast_ctx_is_vlan(brmctx) &&
1263                !(brmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED);
1264 }
1265
1266 static inline bool
1267 br_multicast_port_ctx_vlan_disabled(const struct net_bridge_mcast_port *pmctx)
1268 {
1269         return br_multicast_port_ctx_is_vlan(pmctx) &&
1270                !(pmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED);
1271 }
1272
1273 static inline bool
1274 br_multicast_port_ctx_state_disabled(const struct net_bridge_mcast_port *pmctx)
1275 {
1276         return pmctx->port->state == BR_STATE_DISABLED ||
1277                (br_multicast_port_ctx_is_vlan(pmctx) &&
1278                 (br_multicast_port_ctx_vlan_disabled(pmctx) ||
1279                  pmctx->vlan->state == BR_STATE_DISABLED));
1280 }
1281
1282 static inline bool
1283 br_multicast_port_ctx_state_stopped(const struct net_bridge_mcast_port *pmctx)
1284 {
1285         return br_multicast_port_ctx_state_disabled(pmctx) ||
1286                pmctx->port->state == BR_STATE_BLOCKING ||
1287                (br_multicast_port_ctx_is_vlan(pmctx) &&
1288                 pmctx->vlan->state == BR_STATE_BLOCKING);
1289 }
1290
1291 static inline bool
1292 br_rports_have_mc_router(const struct net_bridge_mcast *brmctx)
1293 {
1294 #if IS_ENABLED(CONFIG_IPV6)
1295         return !hlist_empty(&brmctx->ip4_mc_router_list) ||
1296                !hlist_empty(&brmctx->ip6_mc_router_list);
1297 #else
1298         return !hlist_empty(&brmctx->ip4_mc_router_list);
1299 #endif
1300 }
1301
1302 static inline bool
1303 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1,
1304                                const struct net_bridge_mcast *brmctx2)
1305 {
1306         return brmctx1->multicast_igmp_version ==
1307                brmctx2->multicast_igmp_version &&
1308                brmctx1->multicast_last_member_count ==
1309                brmctx2->multicast_last_member_count &&
1310                brmctx1->multicast_startup_query_count ==
1311                brmctx2->multicast_startup_query_count &&
1312                brmctx1->multicast_last_member_interval ==
1313                brmctx2->multicast_last_member_interval &&
1314                brmctx1->multicast_membership_interval ==
1315                brmctx2->multicast_membership_interval &&
1316                brmctx1->multicast_querier_interval ==
1317                brmctx2->multicast_querier_interval &&
1318                brmctx1->multicast_query_interval ==
1319                brmctx2->multicast_query_interval &&
1320                brmctx1->multicast_query_response_interval ==
1321                brmctx2->multicast_query_response_interval &&
1322                brmctx1->multicast_startup_query_interval ==
1323                brmctx2->multicast_startup_query_interval &&
1324                brmctx1->multicast_querier == brmctx2->multicast_querier &&
1325                brmctx1->multicast_router == brmctx2->multicast_router &&
1326                !br_rports_have_mc_router(brmctx1) &&
1327                !br_rports_have_mc_router(brmctx2) &&
1328 #if IS_ENABLED(CONFIG_IPV6)
1329                brmctx1->multicast_mld_version ==
1330                brmctx2->multicast_mld_version &&
1331 #endif
1332                true;
1333 }
1334
1335 static inline bool
1336 br_multicast_ctx_matches_vlan_snooping(const struct net_bridge_mcast *brmctx)
1337 {
1338         bool vlan_snooping_enabled;
1339
1340         vlan_snooping_enabled = !!br_opt_get(brmctx->br,
1341                                              BROPT_MCAST_VLAN_SNOOPING_ENABLED);
1342
1343         return !!(vlan_snooping_enabled == br_multicast_ctx_is_vlan(brmctx));
1344 }
1345 #else
1346 static inline int br_multicast_rcv(struct net_bridge_mcast **brmctx,
1347                                    struct net_bridge_mcast_port **pmctx,
1348                                    struct net_bridge_vlan *vlan,
1349                                    struct sk_buff *skb,
1350                                    u16 vid)
1351 {
1352         return 0;
1353 }
1354
1355 static inline struct net_bridge_mdb_entry *
1356 br_mdb_entry_skb_get(struct net_bridge_mcast *brmctx, struct sk_buff *skb,
1357                      u16 vid)
1358 {
1359         return NULL;
1360 }
1361
1362 static inline int br_multicast_add_port(struct net_bridge_port *port)
1363 {
1364         return 0;
1365 }
1366
1367 static inline void br_multicast_del_port(struct net_bridge_port *port)
1368 {
1369 }
1370
1371 static inline void br_multicast_enable_port(struct net_bridge_port *port)
1372 {
1373 }
1374
1375 static inline void br_multicast_disable_port(struct net_bridge_port *port)
1376 {
1377 }
1378
1379 static inline void br_multicast_init(struct net_bridge *br)
1380 {
1381 }
1382
1383 static inline void br_multicast_join_snoopers(struct net_bridge *br)
1384 {
1385 }
1386
1387 static inline void br_multicast_leave_snoopers(struct net_bridge *br)
1388 {
1389 }
1390
1391 static inline void br_multicast_open(struct net_bridge *br)
1392 {
1393 }
1394
1395 static inline void br_multicast_stop(struct net_bridge *br)
1396 {
1397 }
1398
1399 static inline void br_multicast_dev_del(struct net_bridge *br)
1400 {
1401 }
1402
1403 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
1404                                       struct sk_buff *skb,
1405                                       struct net_bridge_mcast *brmctx,
1406                                       bool local_rcv, bool local_orig)
1407 {
1408 }
1409
1410 static inline bool br_multicast_is_router(struct net_bridge_mcast *brmctx,
1411                                           struct sk_buff *skb)
1412 {
1413         return false;
1414 }
1415
1416 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1417                                                struct ethhdr *eth,
1418                                                const struct net_bridge_mdb_entry *mdb)
1419 {
1420         return false;
1421 }
1422
1423 static inline int br_mdb_add(struct net_device *dev, struct nlattr *tb[],
1424                              u16 nlmsg_flags, struct netlink_ext_ack *extack)
1425 {
1426         return -EOPNOTSUPP;
1427 }
1428
1429 static inline int br_mdb_del(struct net_device *dev, struct nlattr *tb[],
1430                              struct netlink_ext_ack *extack)
1431 {
1432         return -EOPNOTSUPP;
1433 }
1434
1435 static inline int br_mdb_del_bulk(struct net_device *dev, struct nlattr *tb[],
1436                                   struct netlink_ext_ack *extack)
1437 {
1438         return -EOPNOTSUPP;
1439 }
1440
1441 static inline int br_mdb_dump(struct net_device *dev, struct sk_buff *skb,
1442                               struct netlink_callback *cb)
1443 {
1444         return 0;
1445 }
1446
1447 static inline int br_mdb_get(struct net_device *dev, struct nlattr *tb[],
1448                              u32 portid, u32 seq,
1449                              struct netlink_ext_ack *extack)
1450 {
1451         return -EOPNOTSUPP;
1452 }
1453
1454 static inline int br_mdb_hash_init(struct net_bridge *br)
1455 {
1456         return 0;
1457 }
1458
1459 static inline void br_mdb_hash_fini(struct net_bridge *br)
1460 {
1461 }
1462
1463 static inline void br_multicast_count(struct net_bridge *br,
1464                                       const struct net_bridge_port *p,
1465                                       const struct sk_buff *skb,
1466                                       u8 type, u8 dir)
1467 {
1468 }
1469
1470 static inline int br_multicast_init_stats(struct net_bridge *br)
1471 {
1472         return 0;
1473 }
1474
1475 static inline void br_multicast_uninit_stats(struct net_bridge *br)
1476 {
1477 }
1478
1479 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
1480 {
1481         return 0;
1482 }
1483
1484 static inline void br_multicast_ctx_init(struct net_bridge *br,
1485                                          struct net_bridge_vlan *vlan,
1486                                          struct net_bridge_mcast *brmctx)
1487 {
1488 }
1489
1490 static inline void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx)
1491 {
1492 }
1493
1494 static inline void br_multicast_port_ctx_init(struct net_bridge_port *port,
1495                                               struct net_bridge_vlan *vlan,
1496                                               struct net_bridge_mcast_port *pmctx)
1497 {
1498 }
1499
1500 static inline void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx)
1501 {
1502 }
1503
1504 static inline void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan,
1505                                                 bool on)
1506 {
1507 }
1508
1509 static inline int br_multicast_toggle_vlan_snooping(struct net_bridge *br,
1510                                                     bool on,
1511                                                     struct netlink_ext_ack *extack)
1512 {
1513         return -EOPNOTSUPP;
1514 }
1515
1516 static inline bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan,
1517                                                    bool on)
1518 {
1519         return false;
1520 }
1521
1522 static inline bool
1523 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1,
1524                                const struct net_bridge_mcast *brmctx2)
1525 {
1526         return true;
1527 }
1528 #endif
1529
1530 /* br_vlan.c */
1531 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1532 bool br_allowed_ingress(const struct net_bridge *br,
1533                         struct net_bridge_vlan_group *vg, struct sk_buff *skb,
1534                         u16 *vid, u8 *state,
1535                         struct net_bridge_vlan **vlan);
1536 bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1537                        const struct sk_buff *skb);
1538 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
1539 struct sk_buff *br_handle_vlan(struct net_bridge *br,
1540                                const struct net_bridge_port *port,
1541                                struct net_bridge_vlan_group *vg,
1542                                struct sk_buff *skb);
1543 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1544                 bool *changed, struct netlink_ext_ack *extack);
1545 int br_vlan_delete(struct net_bridge *br, u16 vid);
1546 void br_vlan_flush(struct net_bridge *br);
1547 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
1548 void br_recalculate_fwd_mask(struct net_bridge *br);
1549 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val,
1550                           struct netlink_ext_ack *extack);
1551 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto,
1552                         struct netlink_ext_ack *extack);
1553 int br_vlan_set_proto(struct net_bridge *br, unsigned long val,
1554                       struct netlink_ext_ack *extack);
1555 int br_vlan_set_stats(struct net_bridge *br, unsigned long val);
1556 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val);
1557 int br_vlan_init(struct net_bridge *br);
1558 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val,
1559                              struct netlink_ext_ack *extack);
1560 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid,
1561                                struct netlink_ext_ack *extack);
1562 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1563                  bool *changed, struct netlink_ext_ack *extack);
1564 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
1565 void nbp_vlan_flush(struct net_bridge_port *port);
1566 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack);
1567 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
1568 void br_vlan_get_stats(const struct net_bridge_vlan *v,
1569                        struct pcpu_sw_netstats *stats);
1570 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event);
1571 int br_vlan_bridge_event(struct net_device *dev, unsigned long event,
1572                          void *ptr);
1573 void br_vlan_rtnl_init(void);
1574 void br_vlan_rtnl_uninit(void);
1575 void br_vlan_notify(const struct net_bridge *br,
1576                     const struct net_bridge_port *p,
1577                     u16 vid, u16 vid_range,
1578                     int cmd);
1579 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1580                              const struct net_bridge_vlan *range_end);
1581
1582 void br_vlan_fill_forward_path_pvid(struct net_bridge *br,
1583                                     struct net_device_path_ctx *ctx,
1584                                     struct net_device_path *path);
1585 int br_vlan_fill_forward_path_mode(struct net_bridge *br,
1586                                    struct net_bridge_port *dst,
1587                                    struct net_device_path *path);
1588
1589 static inline struct net_bridge_vlan_group *br_vlan_group(
1590                                         const struct net_bridge *br)
1591 {
1592         return rtnl_dereference(br->vlgrp);
1593 }
1594
1595 static inline struct net_bridge_vlan_group *nbp_vlan_group(
1596                                         const struct net_bridge_port *p)
1597 {
1598         return rtnl_dereference(p->vlgrp);
1599 }
1600
1601 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1602                                         const struct net_bridge *br)
1603 {
1604         return rcu_dereference(br->vlgrp);
1605 }
1606
1607 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1608                                         const struct net_bridge_port *p)
1609 {
1610         return rcu_dereference(p->vlgrp);
1611 }
1612
1613 /* Since bridge now depends on 8021Q module, but the time bridge sees the
1614  * skb, the vlan tag will always be present if the frame was tagged.
1615  */
1616 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
1617 {
1618         int err = 0;
1619
1620         if (skb_vlan_tag_present(skb)) {
1621                 *vid = skb_vlan_tag_get_id(skb);
1622         } else {
1623                 *vid = 0;
1624                 err = -EINVAL;
1625         }
1626
1627         return err;
1628 }
1629
1630 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1631 {
1632         if (!vg)
1633                 return 0;
1634
1635         smp_rmb();
1636         return vg->pvid;
1637 }
1638
1639 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid)
1640 {
1641         return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags;
1642 }
1643 #else
1644 static inline bool br_allowed_ingress(const struct net_bridge *br,
1645                                       struct net_bridge_vlan_group *vg,
1646                                       struct sk_buff *skb,
1647                                       u16 *vid, u8 *state,
1648                                       struct net_bridge_vlan **vlan)
1649
1650 {
1651         *vlan = NULL;
1652         return true;
1653 }
1654
1655 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1656                                      const struct sk_buff *skb)
1657 {
1658         return true;
1659 }
1660
1661 static inline bool br_should_learn(struct net_bridge_port *p,
1662                                    struct sk_buff *skb, u16 *vid)
1663 {
1664         return true;
1665 }
1666
1667 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
1668                                              const struct net_bridge_port *port,
1669                                              struct net_bridge_vlan_group *vg,
1670                                              struct sk_buff *skb)
1671 {
1672         return skb;
1673 }
1674
1675 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1676                               bool *changed, struct netlink_ext_ack *extack)
1677 {
1678         *changed = false;
1679         return -EOPNOTSUPP;
1680 }
1681
1682 static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
1683 {
1684         return -EOPNOTSUPP;
1685 }
1686
1687 static inline void br_vlan_flush(struct net_bridge *br)
1688 {
1689 }
1690
1691 static inline void br_recalculate_fwd_mask(struct net_bridge *br)
1692 {
1693 }
1694
1695 static inline int br_vlan_init(struct net_bridge *br)
1696 {
1697         return 0;
1698 }
1699
1700 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1701                                bool *changed, struct netlink_ext_ack *extack)
1702 {
1703         *changed = false;
1704         return -EOPNOTSUPP;
1705 }
1706
1707 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
1708 {
1709         return -EOPNOTSUPP;
1710 }
1711
1712 static inline void nbp_vlan_flush(struct net_bridge_port *port)
1713 {
1714 }
1715
1716 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
1717                                                    u16 vid)
1718 {
1719         return NULL;
1720 }
1721
1722 static inline int nbp_vlan_init(struct net_bridge_port *port,
1723                                 struct netlink_ext_ack *extack)
1724 {
1725         return 0;
1726 }
1727
1728 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
1729 {
1730         return 0;
1731 }
1732
1733 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1734 {
1735         return 0;
1736 }
1737
1738 static inline int br_vlan_filter_toggle(struct net_bridge *br,
1739                                         unsigned long val,
1740                                         struct netlink_ext_ack *extack)
1741 {
1742         return -EOPNOTSUPP;
1743 }
1744
1745 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
1746                                          u32 filter_mask)
1747 {
1748         return 0;
1749 }
1750
1751 static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br,
1752                                                   struct net_device_path_ctx *ctx,
1753                                                   struct net_device_path *path)
1754 {
1755 }
1756
1757 static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br,
1758                                                  struct net_bridge_port *dst,
1759                                                  struct net_device_path *path)
1760 {
1761         return 0;
1762 }
1763
1764 static inline struct net_bridge_vlan_group *br_vlan_group(
1765                                         const struct net_bridge *br)
1766 {
1767         return NULL;
1768 }
1769
1770 static inline struct net_bridge_vlan_group *nbp_vlan_group(
1771                                         const struct net_bridge_port *p)
1772 {
1773         return NULL;
1774 }
1775
1776 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1777                                         const struct net_bridge *br)
1778 {
1779         return NULL;
1780 }
1781
1782 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1783                                         const struct net_bridge_port *p)
1784 {
1785         return NULL;
1786 }
1787
1788 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v,
1789                                      struct pcpu_sw_netstats *stats)
1790 {
1791 }
1792
1793 static inline void br_vlan_port_event(struct net_bridge_port *p,
1794                                       unsigned long event)
1795 {
1796 }
1797
1798 static inline int br_vlan_bridge_event(struct net_device *dev,
1799                                        unsigned long event, void *ptr)
1800 {
1801         return 0;
1802 }
1803
1804 static inline void br_vlan_rtnl_init(void)
1805 {
1806 }
1807
1808 static inline void br_vlan_rtnl_uninit(void)
1809 {
1810 }
1811
1812 static inline void br_vlan_notify(const struct net_bridge *br,
1813                                   const struct net_bridge_port *p,
1814                                   u16 vid, u16 vid_range,
1815                                   int cmd)
1816 {
1817 }
1818
1819 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1820                                            const struct net_bridge_vlan *range_end)
1821 {
1822         return true;
1823 }
1824
1825 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid)
1826 {
1827         return 0;
1828 }
1829
1830 #endif
1831
1832 /* br_vlan_options.c */
1833 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1834 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr,
1835                            const struct net_bridge_vlan *range_end);
1836 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v,
1837                        const struct net_bridge_port *p);
1838 size_t br_vlan_opts_nl_size(void);
1839 int br_vlan_process_options(const struct net_bridge *br,
1840                             const struct net_bridge_port *p,
1841                             struct net_bridge_vlan *range_start,
1842                             struct net_bridge_vlan *range_end,
1843                             struct nlattr **tb,
1844                             struct netlink_ext_ack *extack);
1845 int br_vlan_rtm_process_global_options(struct net_device *dev,
1846                                        const struct nlattr *attr,
1847                                        int cmd,
1848                                        struct netlink_ext_ack *extack);
1849 bool br_vlan_global_opts_can_enter_range(const struct net_bridge_vlan *v_curr,
1850                                          const struct net_bridge_vlan *r_end);
1851 bool br_vlan_global_opts_fill(struct sk_buff *skb, u16 vid, u16 vid_range,
1852                               const struct net_bridge_vlan *v_opts);
1853
1854 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */
1855 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v)
1856 {
1857         return READ_ONCE(v->state);
1858 }
1859
1860 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state)
1861 {
1862         WRITE_ONCE(v->state, state);
1863 }
1864
1865 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg)
1866 {
1867         return READ_ONCE(vg->pvid_state);
1868 }
1869
1870 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg,
1871                                           u8 state)
1872 {
1873         WRITE_ONCE(vg->pvid_state, state);
1874 }
1875
1876 /* learn_allow is true at ingress and false at egress */
1877 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow)
1878 {
1879         switch (state) {
1880         case BR_STATE_LEARNING:
1881                 return learn_allow;
1882         case BR_STATE_FORWARDING:
1883                 return true;
1884         default:
1885                 return false;
1886         }
1887 }
1888 #endif
1889
1890 /* br_mst.c */
1891 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1892 DECLARE_STATIC_KEY_FALSE(br_mst_used);
1893 static inline bool br_mst_is_enabled(struct net_bridge *br)
1894 {
1895         return static_branch_unlikely(&br_mst_used) &&
1896                 br_opt_get(br, BROPT_MST_ENABLED);
1897 }
1898
1899 int br_mst_set_state(struct net_bridge_port *p, u16 msti, u8 state,
1900                      struct netlink_ext_ack *extack);
1901 int br_mst_vlan_set_msti(struct net_bridge_vlan *v, u16 msti);
1902 void br_mst_vlan_init_state(struct net_bridge_vlan *v);
1903 int br_mst_set_enabled(struct net_bridge *br, bool on,
1904                        struct netlink_ext_ack *extack);
1905 size_t br_mst_info_size(const struct net_bridge_vlan_group *vg);
1906 int br_mst_fill_info(struct sk_buff *skb,
1907                      const struct net_bridge_vlan_group *vg);
1908 int br_mst_process(struct net_bridge_port *p, const struct nlattr *mst_attr,
1909                    struct netlink_ext_ack *extack);
1910 #else
1911 static inline bool br_mst_is_enabled(struct net_bridge *br)
1912 {
1913         return false;
1914 }
1915
1916 static inline int br_mst_set_state(struct net_bridge_port *p, u16 msti,
1917                                    u8 state, struct netlink_ext_ack *extack)
1918 {
1919         return -EOPNOTSUPP;
1920 }
1921
1922 static inline int br_mst_set_enabled(struct net_bridge *br, bool on,
1923                                      struct netlink_ext_ack *extack)
1924 {
1925         return -EOPNOTSUPP;
1926 }
1927
1928 static inline size_t br_mst_info_size(const struct net_bridge_vlan_group *vg)
1929 {
1930         return 0;
1931 }
1932
1933 static inline int br_mst_fill_info(struct sk_buff *skb,
1934                                    const struct net_bridge_vlan_group *vg)
1935 {
1936         return -EOPNOTSUPP;
1937 }
1938
1939 static inline int br_mst_process(struct net_bridge_port *p,
1940                                  const struct nlattr *mst_attr,
1941                                  struct netlink_ext_ack *extack)
1942 {
1943         return -EOPNOTSUPP;
1944 }
1945 #endif
1946
1947 struct nf_br_ops {
1948         int (*br_dev_xmit_hook)(struct sk_buff *skb);
1949 };
1950 extern const struct nf_br_ops __rcu *nf_br_ops;
1951
1952 /* br_netfilter.c */
1953 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1954 int br_nf_core_init(void);
1955 void br_nf_core_fini(void);
1956 void br_netfilter_rtable_init(struct net_bridge *);
1957 #else
1958 static inline int br_nf_core_init(void) { return 0; }
1959 static inline void br_nf_core_fini(void) {}
1960 #define br_netfilter_rtable_init(x)
1961 #endif
1962
1963 /* br_stp.c */
1964 void br_set_state(struct net_bridge_port *p, unsigned int state);
1965 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
1966 void br_init_port(struct net_bridge_port *p);
1967 void br_become_designated_port(struct net_bridge_port *p);
1968
1969 void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
1970 int br_set_forward_delay(struct net_bridge *br, unsigned long x);
1971 int br_set_hello_time(struct net_bridge *br, unsigned long x);
1972 int br_set_max_age(struct net_bridge *br, unsigned long x);
1973 int __set_ageing_time(struct net_device *dev, unsigned long t);
1974 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time);
1975
1976
1977 /* br_stp_if.c */
1978 void br_stp_enable_bridge(struct net_bridge *br);
1979 void br_stp_disable_bridge(struct net_bridge *br);
1980 int br_stp_set_enabled(struct net_bridge *br, unsigned long val,
1981                        struct netlink_ext_ack *extack);
1982 void br_stp_enable_port(struct net_bridge_port *p);
1983 void br_stp_disable_port(struct net_bridge_port *p);
1984 bool br_stp_recalculate_bridge_id(struct net_bridge *br);
1985 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
1986 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
1987 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
1988 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
1989 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
1990
1991 /* br_stp_bpdu.c */
1992 struct stp_proto;
1993 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
1994                 struct net_device *dev);
1995
1996 /* br_stp_timer.c */
1997 void br_stp_timer_init(struct net_bridge *br);
1998 void br_stp_port_timer_init(struct net_bridge_port *p);
1999 unsigned long br_timer_value(const struct timer_list *timer);
2000
2001 /* br.c */
2002 #if IS_ENABLED(CONFIG_ATM_LANE)
2003 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
2004 #endif
2005
2006 /* br_mrp.c */
2007 #if IS_ENABLED(CONFIG_BRIDGE_MRP)
2008 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
2009                  struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
2010 bool br_mrp_enabled(struct net_bridge *br);
2011 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p);
2012 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br);
2013 #else
2014 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
2015                                struct nlattr *attr, int cmd,
2016                                struct netlink_ext_ack *extack)
2017 {
2018         return -EOPNOTSUPP;
2019 }
2020
2021 static inline bool br_mrp_enabled(struct net_bridge *br)
2022 {
2023         return false;
2024 }
2025
2026 static inline void br_mrp_port_del(struct net_bridge *br,
2027                                    struct net_bridge_port *p)
2028 {
2029 }
2030
2031 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br)
2032 {
2033         return 0;
2034 }
2035
2036 #endif
2037
2038 /* br_cfm.c */
2039 #if IS_ENABLED(CONFIG_BRIDGE_CFM)
2040 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
2041                  struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
2042 bool br_cfm_created(struct net_bridge *br);
2043 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p);
2044 int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br);
2045 int br_cfm_status_fill_info(struct sk_buff *skb,
2046                             struct net_bridge *br,
2047                             bool getlink);
2048 int br_cfm_mep_count(struct net_bridge *br, u32 *count);
2049 int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count);
2050 #else
2051 static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
2052                                struct nlattr *attr, int cmd,
2053                                struct netlink_ext_ack *extack)
2054 {
2055         return -EOPNOTSUPP;
2056 }
2057
2058 static inline bool br_cfm_created(struct net_bridge *br)
2059 {
2060         return false;
2061 }
2062
2063 static inline void br_cfm_port_del(struct net_bridge *br,
2064                                    struct net_bridge_port *p)
2065 {
2066 }
2067
2068 static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br)
2069 {
2070         return -EOPNOTSUPP;
2071 }
2072
2073 static inline int br_cfm_status_fill_info(struct sk_buff *skb,
2074                                           struct net_bridge *br,
2075                                           bool getlink)
2076 {
2077         return -EOPNOTSUPP;
2078 }
2079
2080 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count)
2081 {
2082         *count = 0;
2083         return -EOPNOTSUPP;
2084 }
2085
2086 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count)
2087 {
2088         *count = 0;
2089         return -EOPNOTSUPP;
2090 }
2091 #endif
2092
2093 /* br_netlink.c */
2094 extern struct rtnl_link_ops br_link_ops;
2095 int br_netlink_init(void);
2096 void br_netlink_fini(void);
2097 void br_ifinfo_notify(int event, const struct net_bridge *br,
2098                       const struct net_bridge_port *port);
2099 void br_info_notify(int event, const struct net_bridge *br,
2100                     const struct net_bridge_port *port, u32 filter);
2101 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags,
2102                struct netlink_ext_ack *extack);
2103 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
2104 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
2105                u32 filter_mask, int nlflags);
2106 int br_process_vlan_info(struct net_bridge *br,
2107                          struct net_bridge_port *p, int cmd,
2108                          struct bridge_vlan_info *vinfo_curr,
2109                          struct bridge_vlan_info **vinfo_last,
2110                          bool *changed,
2111                          struct netlink_ext_ack *extack);
2112
2113 #ifdef CONFIG_SYSFS
2114 /* br_sysfs_if.c */
2115 extern const struct sysfs_ops brport_sysfs_ops;
2116 int br_sysfs_addif(struct net_bridge_port *p);
2117 int br_sysfs_renameif(struct net_bridge_port *p);
2118
2119 /* br_sysfs_br.c */
2120 int br_sysfs_addbr(struct net_device *dev);
2121 void br_sysfs_delbr(struct net_device *dev);
2122
2123 #else
2124
2125 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
2126 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
2127 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
2128 static inline void br_sysfs_delbr(struct net_device *dev) { return; }
2129 #endif /* CONFIG_SYSFS */
2130
2131 /* br_switchdev.c */
2132 #ifdef CONFIG_NET_SWITCHDEV
2133 int br_switchdev_port_offload(struct net_bridge_port *p,
2134                               struct net_device *dev, const void *ctx,
2135                               struct notifier_block *atomic_nb,
2136                               struct notifier_block *blocking_nb,
2137                               bool tx_fwd_offload,
2138                               struct netlink_ext_ack *extack);
2139
2140 void br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx,
2141                                  struct notifier_block *atomic_nb,
2142                                  struct notifier_block *blocking_nb);
2143
2144 int br_switchdev_port_replay(struct net_bridge_port *p,
2145                              struct net_device *dev, const void *ctx,
2146                              struct notifier_block *atomic_nb,
2147                              struct notifier_block *blocking_nb,
2148                              struct netlink_ext_ack *extack);
2149
2150 bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb);
2151
2152 void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb);
2153
2154 void nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p,
2155                                              struct sk_buff *skb);
2156 void nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p,
2157                                               struct sk_buff *skb);
2158 void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
2159                               struct sk_buff *skb);
2160 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
2161                                   const struct sk_buff *skb);
2162 int br_switchdev_set_port_flag(struct net_bridge_port *p,
2163                                unsigned long flags,
2164                                unsigned long mask,
2165                                struct netlink_ext_ack *extack);
2166 void br_switchdev_fdb_notify(struct net_bridge *br,
2167                              const struct net_bridge_fdb_entry *fdb, int type);
2168 void br_switchdev_mdb_notify(struct net_device *dev,
2169                              struct net_bridge_mdb_entry *mp,
2170                              struct net_bridge_port_group *pg,
2171                              int type);
2172 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags,
2173                                bool changed, struct netlink_ext_ack *extack);
2174 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid);
2175 void br_switchdev_init(struct net_bridge *br);
2176
2177 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
2178 {
2179         skb->offload_fwd_mark = 0;
2180 }
2181 #else
2182 static inline int
2183 br_switchdev_port_offload(struct net_bridge_port *p,
2184                           struct net_device *dev, const void *ctx,
2185                           struct notifier_block *atomic_nb,
2186                           struct notifier_block *blocking_nb,
2187                           bool tx_fwd_offload,
2188                           struct netlink_ext_ack *extack)
2189 {
2190         return -EOPNOTSUPP;
2191 }
2192
2193 static inline void
2194 br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx,
2195                             struct notifier_block *atomic_nb,
2196                             struct notifier_block *blocking_nb)
2197 {
2198 }
2199
2200 static inline int
2201 br_switchdev_port_replay(struct net_bridge_port *p,
2202                          struct net_device *dev, const void *ctx,
2203                          struct notifier_block *atomic_nb,
2204                          struct notifier_block *blocking_nb,
2205                          struct netlink_ext_ack *extack)
2206 {
2207         return -EOPNOTSUPP;
2208 }
2209
2210 static inline bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb)
2211 {
2212         return false;
2213 }
2214
2215 static inline void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb)
2216 {
2217 }
2218
2219 static inline void
2220 nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p,
2221                                         struct sk_buff *skb)
2222 {
2223 }
2224
2225 static inline void
2226 nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p,
2227                                          struct sk_buff *skb)
2228 {
2229 }
2230
2231 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
2232                                             struct sk_buff *skb)
2233 {
2234 }
2235
2236 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
2237                                                 const struct sk_buff *skb)
2238 {
2239         return true;
2240 }
2241
2242 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p,
2243                                              unsigned long flags,
2244                                              unsigned long mask,
2245                                              struct netlink_ext_ack *extack)
2246 {
2247         return 0;
2248 }
2249
2250 static inline int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid,
2251                                              u16 flags, bool changed,
2252                                              struct netlink_ext_ack *extack)
2253 {
2254         return -EOPNOTSUPP;
2255 }
2256
2257 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid)
2258 {
2259         return -EOPNOTSUPP;
2260 }
2261
2262 static inline void
2263 br_switchdev_fdb_notify(struct net_bridge *br,
2264                         const struct net_bridge_fdb_entry *fdb, int type)
2265 {
2266 }
2267
2268 static inline void br_switchdev_mdb_notify(struct net_device *dev,
2269                                            struct net_bridge_mdb_entry *mp,
2270                                            struct net_bridge_port_group *pg,
2271                                            int type)
2272 {
2273 }
2274
2275 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
2276 {
2277 }
2278
2279 static inline void br_switchdev_init(struct net_bridge *br)
2280 {
2281 }
2282
2283 #endif /* CONFIG_NET_SWITCHDEV */
2284
2285 /* br_arp_nd_proxy.c */
2286 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br);
2287 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br,
2288                               u16 vid, struct net_bridge_port *p);
2289 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br,
2290                        u16 vid, struct net_bridge_port *p, struct nd_msg *msg);
2291 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m);
2292 bool br_is_neigh_suppress_enabled(const struct net_bridge_port *p, u16 vid);
2293 #endif