include/net/bonding.h

   1 /*
   2  * Bond several ethernet interfaces into a Cisco, running 'Etherchannel'.
   3  *
   4  * Portions are (c) Copyright 1995 Simon "Guru Aleph-Null" Janes
   5  * NCM: Network and Communications Management, Inc.
   6  *
   7  * BUT, I'm the one who modified it for ethernet, so:
   8  * (c) Copyright 1999, Thomas Davis, tadavis@lbl.gov
   9  *
  10  *      This software may be used and distributed according to the terms
  11  *      of the GNU Public License, incorporated herein by reference.
  12  *
  13  */
  14
  15 #ifndef _NET_BONDING_H
  16 #define _NET_BONDING_H
  17
  18 #include <linux/timer.h>
  19 #include <linux/proc_fs.h>
  20 #include <linux/if_bonding.h>
  21 #include <linux/cpumask.h>
  22 #include <linux/in6.h>
  23 #include <linux/netpoll.h>
  24 #include <linux/inetdevice.h>
  25 #include <linux/etherdevice.h>
  26 #include <linux/reciprocal_div.h>
  27 #include <linux/if_link.h>
  28
  29 #include <net/bond_3ad.h>
  30 #include <net/bond_alb.h>
  31 #include <net/bond_options.h>
  32
  33 #define BOND_MAX_ARP_TARGETS    16
  34
  35 #define BOND_DEFAULT_MIIMON     100
  36
  37 #ifndef __long_aligned
  38 #define __long_aligned __attribute__((aligned((sizeof(long)))))
  39 #endif
  40
  41 #define slave_info(bond_dev, slave_dev, fmt, ...) \
  42         netdev_info(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
  43 #define slave_warn(bond_dev, slave_dev, fmt, ...) \
  44         netdev_warn(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
  45 #define slave_dbg(bond_dev, slave_dev, fmt, ...) \
  46         netdev_dbg(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
  47 #define slave_err(bond_dev, slave_dev, fmt, ...) \
  48         netdev_err(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
  49
  50 #define BOND_MODE(bond) ((bond)->params.mode)
  51
  52 /* slave list primitives */
  53 #define bond_slave_list(bond) (&(bond)->dev->adj_list.lower)
  54
  55 #define bond_has_slaves(bond) !list_empty(bond_slave_list(bond))
  56
  57 /* IMPORTANT: bond_first/last_slave can return NULL in case of an empty list */
  58 #define bond_first_slave(bond) \
  59         (bond_has_slaves(bond) ? \
  60                 netdev_adjacent_get_private(bond_slave_list(bond)->next) : \
  61                 NULL)
  62 #define bond_last_slave(bond) \
  63         (bond_has_slaves(bond) ? \
  64                 netdev_adjacent_get_private(bond_slave_list(bond)->prev) : \
  65                 NULL)
  66
  67 /* Caller must have rcu_read_lock */
  68 #define bond_first_slave_rcu(bond) \
  69         netdev_lower_get_first_private_rcu(bond->dev)
  70
  71 #define bond_is_first_slave(bond, pos) (pos == bond_first_slave(bond))
  72 #define bond_is_last_slave(bond, pos) (pos == bond_last_slave(bond))
  73
  74 /**
  75  * bond_for_each_slave - iterate over all slaves
  76  * @bond:       the bond holding this list
  77  * @pos:        current slave
  78  * @iter:       list_head * iterator
  79  *
  80  * Caller must hold RTNL
  81  */
  82 #define bond_for_each_slave(bond, pos, iter) \
  83         netdev_for_each_lower_private((bond)->dev, pos, iter)
  84
  85 /* Caller must have rcu_read_lock */
  86 #define bond_for_each_slave_rcu(bond, pos, iter) \
  87         netdev_for_each_lower_private_rcu((bond)->dev, pos, iter)
  88
  89 #ifdef CONFIG_NET_POLL_CONTROLLER
  90 extern atomic_t netpoll_block_tx;
  91
  92 static inline void block_netpoll_tx(void)
  93 {
  94         atomic_inc(&netpoll_block_tx);
  95 }
  96
  97 static inline void unblock_netpoll_tx(void)
  98 {
  99         atomic_dec(&netpoll_block_tx);
 100 }
 101
 102 static inline int is_netpoll_tx_blocked(struct net_device *dev)
 103 {
 104         if (unlikely(netpoll_tx_running(dev)))
 105                 return atomic_read(&netpoll_block_tx);
 106         return 0;
 107 }
 108 #else
 109 #define block_netpoll_tx()
 110 #define unblock_netpoll_tx()
 111 #define is_netpoll_tx_blocked(dev) (0)
 112 #endif
 113
 114 struct bond_params {
 115         int mode;
 116         int xmit_policy;
 117         int miimon;
 118         u8 num_peer_notif;
 119         int arp_interval;
 120         int arp_validate;
 121         int arp_all_targets;
 122         int use_carrier;
 123         int fail_over_mac;
 124         int updelay;
 125         int downdelay;
 126         int peer_notif_delay;
 127         int lacp_fast;
 128         unsigned int min_links;
 129         int ad_select;
 130         char primary[IFNAMSIZ];
 131         int primary_reselect;
 132         __be32 arp_targets[BOND_MAX_ARP_TARGETS];
 133         int tx_queues;
 134         int all_slaves_active;
 135         int resend_igmp;
 136         int lp_interval;
 137         int packets_per_slave;
 138         int tlb_dynamic_lb;
 139         struct reciprocal_value reciprocal_packets_per_slave;
 140         u16 ad_actor_sys_prio;
 141         u16 ad_user_port_key;
 142
 143         /* 2 bytes of padding : see ether_addr_equal_64bits() */
 144         u8 ad_actor_system[ETH_ALEN + 2];
 145 };
 146
 147 struct bond_parm_tbl {
 148         char *modename;
 149         int mode;
 150 };
 151
 152 struct slave {
 153         struct net_device *dev; /* first - useful for panic debug */
 154         struct bonding *bond; /* our master */
 155         int    delay;
 156         /* all three in jiffies */
 157         unsigned long last_link_up;
 158         unsigned long last_rx;
 159         unsigned long target_last_arp_rx[BOND_MAX_ARP_TARGETS];
 160         s8     link;            /* one of BOND_LINK_XXXX */
 161         s8     link_new_state;  /* one of BOND_LINK_XXXX */
 162         u8     backup:1,   /* indicates backup slave. Value corresponds with
 163                               BOND_STATE_ACTIVE and BOND_STATE_BACKUP */
 164                inactive:1, /* indicates inactive slave */
 165                should_notify:1, /* indicates whether the state changed */
 166                should_notify_link:1; /* indicates whether the link changed */
 167         u8     duplex;
 168         u32    original_mtu;
 169         u32    link_failure_count;
 170         u32    speed;
 171         u16    queue_id;
 172         u8     perm_hwaddr[MAX_ADDR_LEN];
 173         struct ad_slave_info *ad_info;
 174         struct tlb_slave_info tlb_info;
 175 #ifdef CONFIG_NET_POLL_CONTROLLER
 176         struct netpoll *np;
 177 #endif
 178         struct delayed_work notify_work;
 179         struct kobject kobj;
 180         struct rtnl_link_stats64 slave_stats;
 181 };
 182
 183 struct bond_up_slave {
 184         unsigned int    count;
 185         struct rcu_head rcu;
 186         struct slave    *arr[];
 187 };
 188
 189 /*
 190  * Link pseudo-state only used internally by monitors
 191  */
 192 #define BOND_LINK_NOCHANGE -1
 193
 194 /*
 195  * Here are the locking policies for the two bonding locks:
 196  * Get rcu_read_lock when reading or RTNL when writing slave list.
 197  */
 198 struct bonding {
 199         struct   net_device *dev; /* first - useful for panic debug */
 200         struct   slave __rcu *curr_active_slave;
 201         struct   slave __rcu *current_arp_slave;
 202         struct   slave __rcu *primary_slave;
 203         struct   bond_up_slave __rcu *slave_arr; /* Array of usable slaves */
 204         bool     force_primary;
 205         s32      slave_cnt; /* never change this value outside the attach/detach wrappers */
 206         int     (*recv_probe)(const struct sk_buff *, struct bonding *,
 207                               struct slave *);
 208         /* mode_lock is used for mode-specific locking needs, currently used by:
 209          * 3ad mode (4) - protect against running bond_3ad_unbind_slave() and
 210          *                bond_3ad_state_machine_handler() concurrently and also
 211          *                the access to the state machine shared variables.
 212          * TLB mode (5) - to sync the use and modifications of its hash table
 213          * ALB mode (6) - to sync the use and modifications of its hash table
 214          */
 215         spinlock_t mode_lock;
 216         spinlock_t stats_lock;
 217         u8       send_peer_notif;
 218         u8       igmp_retrans;
 219 #ifdef CONFIG_PROC_FS
 220         struct   proc_dir_entry *proc_entry;
 221         char     proc_file_name[IFNAMSIZ];
 222 #endif /* CONFIG_PROC_FS */
 223         struct   list_head bond_list;
 224         u32      rr_tx_counter;
 225         struct   ad_bond_info ad_info;
 226         struct   alb_bond_info alb_info;
 227         struct   bond_params params;
 228         struct   workqueue_struct *wq;
 229         struct   delayed_work mii_work;
 230         struct   delayed_work arp_work;
 231         struct   delayed_work alb_work;
 232         struct   delayed_work ad_work;
 233         struct   delayed_work mcast_work;
 234         struct   delayed_work slave_arr_work;
 235 #ifdef CONFIG_DEBUG_FS
 236         /* debugging support via debugfs */
 237         struct   dentry *debug_dir;
 238 #endif /* CONFIG_DEBUG_FS */
 239         struct rtnl_link_stats64 bond_stats;
 240         struct lock_class_key stats_lock_key;
 241 };
 242
 243 #define bond_slave_get_rcu(dev) \
 244         ((struct slave *) rcu_dereference(dev->rx_handler_data))
 245
 246 #define bond_slave_get_rtnl(dev) \
 247         ((struct slave *) rtnl_dereference(dev->rx_handler_data))
 248
 249 void bond_queue_slave_event(struct slave *slave);
 250 void bond_lower_state_changed(struct slave *slave);
 251
 252 struct bond_vlan_tag {
 253         __be16          vlan_proto;
 254         unsigned short  vlan_id;
 255 };
 256
 257 /**
 258  * Returns NULL if the net_device does not belong to any of the bond's slaves
 259  *
 260  * Caller must hold bond lock for read
 261  */
 262 static inline struct slave *bond_get_slave_by_dev(struct bonding *bond,
 263                                                   struct net_device *slave_dev)
 264 {
 265         return netdev_lower_dev_get_private(bond->dev, slave_dev);
 266 }
 267
 268 static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
 269 {
 270         return slave->bond;
 271 }
 272
 273 static inline bool bond_should_override_tx_queue(struct bonding *bond)
 274 {
 275         return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP ||
 276                BOND_MODE(bond) == BOND_MODE_ROUNDROBIN;
 277 }
 278
 279 static inline bool bond_is_lb(const struct bonding *bond)
 280 {
 281         return BOND_MODE(bond) == BOND_MODE_TLB ||
 282                BOND_MODE(bond) == BOND_MODE_ALB;
 283 }
 284
 285 static inline bool bond_needs_speed_duplex(const struct bonding *bond)
 286 {
 287         return BOND_MODE(bond) == BOND_MODE_8023AD || bond_is_lb(bond);
 288 }
 289
 290 static inline bool bond_is_nondyn_tlb(const struct bonding *bond)
 291 {
 292         return (bond_is_lb(bond) && bond->params.tlb_dynamic_lb == 0);
 293 }
 294
 295 static inline bool bond_mode_can_use_xmit_hash(const struct bonding *bond)
 296 {
 297         return (BOND_MODE(bond) == BOND_MODE_8023AD ||
 298                 BOND_MODE(bond) == BOND_MODE_XOR ||
 299                 BOND_MODE(bond) == BOND_MODE_TLB ||
 300                 BOND_MODE(bond) == BOND_MODE_ALB);
 301 }
 302
 303 static inline bool bond_mode_uses_xmit_hash(const struct bonding *bond)
 304 {
 305         return (BOND_MODE(bond) == BOND_MODE_8023AD ||
 306                 BOND_MODE(bond) == BOND_MODE_XOR ||
 307                 bond_is_nondyn_tlb(bond));
 308 }
 309
 310 static inline bool bond_mode_uses_arp(int mode)
 311 {
 312         return mode != BOND_MODE_8023AD && mode != BOND_MODE_TLB &&
 313                mode != BOND_MODE_ALB;
 314 }
 315
 316 static inline bool bond_mode_uses_primary(int mode)
 317 {
 318         return mode == BOND_MODE_ACTIVEBACKUP || mode == BOND_MODE_TLB ||
 319                mode == BOND_MODE_ALB;
 320 }
 321
 322 static inline bool bond_uses_primary(struct bonding *bond)
 323 {
 324         return bond_mode_uses_primary(BOND_MODE(bond));
 325 }
 326
 327 static inline struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
 328 {
 329         struct slave *slave = rcu_dereference(bond->curr_active_slave);
 330
 331         return bond_uses_primary(bond) && slave ? slave->dev : NULL;
 332 }
 333
 334 static inline bool bond_slave_is_up(struct slave *slave)
 335 {
 336         return netif_running(slave->dev) && netif_carrier_ok(slave->dev);
 337 }
 338
 339 static inline void bond_set_active_slave(struct slave *slave)
 340 {
 341         if (slave->backup) {
 342                 slave->backup = 0;
 343                 bond_queue_slave_event(slave);
 344                 bond_lower_state_changed(slave);
 345         }
 346 }
 347
 348 static inline void bond_set_backup_slave(struct slave *slave)
 349 {
 350         if (!slave->backup) {
 351                 slave->backup = 1;
 352                 bond_queue_slave_event(slave);
 353                 bond_lower_state_changed(slave);
 354         }
 355 }
 356
 357 static inline void bond_set_slave_state(struct slave *slave,
 358                                         int slave_state, bool notify)
 359 {
 360         if (slave->backup == slave_state)
 361                 return;
 362
 363         slave->backup = slave_state;
 364         if (notify) {
 365                 bond_lower_state_changed(slave);
 366                 bond_queue_slave_event(slave);
 367                 slave->should_notify = 0;
 368         } else {
 369                 if (slave->should_notify)
 370                         slave->should_notify = 0;
 371                 else
 372                         slave->should_notify = 1;
 373         }
 374 }
 375
 376 static inline void bond_slave_state_change(struct bonding *bond)
 377 {
 378         struct list_head *iter;
 379         struct slave *tmp;
 380
 381         bond_for_each_slave(bond, tmp, iter) {
 382                 if (tmp->link == BOND_LINK_UP)
 383                         bond_set_active_slave(tmp);
 384                 else if (tmp->link == BOND_LINK_DOWN)
 385                         bond_set_backup_slave(tmp);
 386         }
 387 }
 388
 389 static inline void bond_slave_state_notify(struct bonding *bond)
 390 {
 391         struct list_head *iter;
 392         struct slave *tmp;
 393
 394         bond_for_each_slave(bond, tmp, iter) {
 395                 if (tmp->should_notify) {
 396                         bond_lower_state_changed(tmp);
 397                         tmp->should_notify = 0;
 398                 }
 399         }
 400 }
 401
 402 static inline int bond_slave_state(struct slave *slave)
 403 {
 404         return slave->backup;
 405 }
 406
 407 static inline bool bond_is_active_slave(struct slave *slave)
 408 {
 409         return !bond_slave_state(slave);
 410 }
 411
 412 static inline bool bond_slave_can_tx(struct slave *slave)
 413 {
 414         return bond_slave_is_up(slave) && slave->link == BOND_LINK_UP &&
 415                bond_is_active_slave(slave);
 416 }
 417
 418 static inline bool bond_is_active_slave_dev(const struct net_device *slave_dev)
 419 {
 420         struct slave *slave;
 421         bool active;
 422
 423         rcu_read_lock();
 424         slave = bond_slave_get_rcu(slave_dev);
 425         active = bond_is_active_slave(slave);
 426         rcu_read_unlock();
 427
 428         return active;
 429 }
 430
 431 static inline void bond_hw_addr_copy(u8 *dst, const u8 *src, unsigned int len)
 432 {
 433         if (len == ETH_ALEN) {
 434                 ether_addr_copy(dst, src);
 435                 return;
 436         }
 437
 438         memcpy(dst, src, len);
 439 }
 440
 441 #define BOND_PRI_RESELECT_ALWAYS        0
 442 #define BOND_PRI_RESELECT_BETTER        1
 443 #define BOND_PRI_RESELECT_FAILURE       2
 444
 445 #define BOND_FOM_NONE                   0
 446 #define BOND_FOM_ACTIVE                 1
 447 #define BOND_FOM_FOLLOW                 2
 448
 449 #define BOND_ARP_TARGETS_ANY            0
 450 #define BOND_ARP_TARGETS_ALL            1
 451
 452 #define BOND_ARP_VALIDATE_NONE          0
 453 #define BOND_ARP_VALIDATE_ACTIVE        (1 << BOND_STATE_ACTIVE)
 454 #define BOND_ARP_VALIDATE_BACKUP        (1 << BOND_STATE_BACKUP)
 455 #define BOND_ARP_VALIDATE_ALL           (BOND_ARP_VALIDATE_ACTIVE | \
 456                                          BOND_ARP_VALIDATE_BACKUP)
 457 #define BOND_ARP_FILTER                 (BOND_ARP_VALIDATE_ALL + 1)
 458 #define BOND_ARP_FILTER_ACTIVE          (BOND_ARP_VALIDATE_ACTIVE | \
 459                                          BOND_ARP_FILTER)
 460 #define BOND_ARP_FILTER_BACKUP          (BOND_ARP_VALIDATE_BACKUP | \
 461                                          BOND_ARP_FILTER)
 462
 463 #define BOND_SLAVE_NOTIFY_NOW           true
 464 #define BOND_SLAVE_NOTIFY_LATER         false
 465
 466 static inline int slave_do_arp_validate(struct bonding *bond,
 467                                         struct slave *slave)
 468 {
 469         return bond->params.arp_validate & (1 << bond_slave_state(slave));
 470 }
 471
 472 static inline int slave_do_arp_validate_only(struct bonding *bond)
 473 {
 474         return bond->params.arp_validate & BOND_ARP_FILTER;
 475 }
 476
 477 static inline int bond_is_ip_target_ok(__be32 addr)
 478 {
 479         return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr);
 480 }
 481
 482 /* Get the oldest arp which we've received on this slave for bond's
 483  * arp_targets.
 484  */
 485 static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond,
 486                                                        struct slave *slave)
 487 {
 488         int i = 1;
 489         unsigned long ret = slave->target_last_arp_rx[0];
 490
 491         for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++)
 492                 if (time_before(slave->target_last_arp_rx[i], ret))
 493                         ret = slave->target_last_arp_rx[i];
 494
 495         return ret;
 496 }
 497
 498 static inline unsigned long slave_last_rx(struct bonding *bond,
 499                                         struct slave *slave)
 500 {
 501         if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL)
 502                 return slave_oldest_target_arp_rx(bond, slave);
 503
 504         return slave->last_rx;
 505 }
 506
 507 #ifdef CONFIG_NET_POLL_CONTROLLER
 508 static inline void bond_netpoll_send_skb(const struct slave *slave,
 509                                          struct sk_buff *skb)
 510 {
 511         struct netpoll *np = slave->np;
 512
 513         if (np)
 514                 netpoll_send_skb(np, skb);
 515 }
 516 #else
 517 static inline void bond_netpoll_send_skb(const struct slave *slave,
 518                                          struct sk_buff *skb)
 519 {
 520 }
 521 #endif
 522
 523 static inline void bond_set_slave_inactive_flags(struct slave *slave,
 524                                                  bool notify)
 525 {
 526         if (!bond_is_lb(slave->bond))
 527                 bond_set_slave_state(slave, BOND_STATE_BACKUP, notify);
 528         if (!slave->bond->params.all_slaves_active)
 529                 slave->inactive = 1;
 530 }
 531
 532 static inline void bond_set_slave_active_flags(struct slave *slave,
 533                                                bool notify)
 534 {
 535         bond_set_slave_state(slave, BOND_STATE_ACTIVE, notify);
 536         slave->inactive = 0;
 537 }
 538
 539 static inline bool bond_is_slave_inactive(struct slave *slave)
 540 {
 541         return slave->inactive;
 542 }
 543
 544 static inline void bond_propose_link_state(struct slave *slave, int state)
 545 {
 546         slave->link_new_state = state;
 547 }
 548
 549 static inline void bond_commit_link_state(struct slave *slave, bool notify)
 550 {
 551         if (slave->link_new_state == BOND_LINK_NOCHANGE)
 552                 return;
 553
 554         slave->link = slave->link_new_state;
 555         if (notify) {
 556                 bond_queue_slave_event(slave);
 557                 bond_lower_state_changed(slave);
 558                 slave->should_notify_link = 0;
 559         } else {
 560                 if (slave->should_notify_link)
 561                         slave->should_notify_link = 0;
 562                 else
 563                         slave->should_notify_link = 1;
 564         }
 565 }
 566
 567 static inline void bond_set_slave_link_state(struct slave *slave, int state,
 568                                              bool notify)
 569 {
 570         bond_propose_link_state(slave, state);
 571         bond_commit_link_state(slave, notify);
 572 }
 573
 574 static inline void bond_slave_link_notify(struct bonding *bond)
 575 {
 576         struct list_head *iter;
 577         struct slave *tmp;
 578
 579         bond_for_each_slave(bond, tmp, iter) {
 580                 if (tmp->should_notify_link) {
 581                         bond_queue_slave_event(tmp);
 582                         bond_lower_state_changed(tmp);
 583                         tmp->should_notify_link = 0;
 584                 }
 585         }
 586 }
 587
 588 static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
 589 {
 590         struct in_device *in_dev;
 591         __be32 addr = 0;
 592
 593         rcu_read_lock();
 594         in_dev = __in_dev_get_rcu(dev);
 595
 596         if (in_dev)
 597                 addr = inet_confirm_addr(dev_net(dev), in_dev, dst, local,
 598                                          RT_SCOPE_HOST);
 599         rcu_read_unlock();
 600         return addr;
 601 }
 602
 603 struct bond_net {
 604         struct net              *net;   /* Associated network namespace */
 605         struct list_head        dev_list;
 606 #ifdef CONFIG_PROC_FS
 607         struct proc_dir_entry   *proc_dir;
 608 #endif
 609         struct class_attribute  class_attr_bonding_masters;
 610 };
 611
 612 int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond, struct slave *slave);
 613 void bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
 614 int bond_create(struct net *net, const char *name);
 615 int bond_create_sysfs(struct bond_net *net);
 616 void bond_destroy_sysfs(struct bond_net *net);
 617 void bond_prepare_sysfs_group(struct bonding *bond);
 618 int bond_sysfs_slave_add(struct slave *slave);
 619 void bond_sysfs_slave_del(struct slave *slave);
 620 int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev,
 621                  struct netlink_ext_ack *extack);
 622 int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
 623 u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb);
 624 int bond_set_carrier(struct bonding *bond);
 625 void bond_select_active_slave(struct bonding *bond);
 626 void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
 627 void bond_create_debugfs(void);
 628 void bond_destroy_debugfs(void);
 629 void bond_debug_register(struct bonding *bond);
 630 void bond_debug_unregister(struct bonding *bond);
 631 void bond_debug_reregister(struct bonding *bond);
 632 const char *bond_mode_name(int mode);
 633 void bond_setup(struct net_device *bond_dev);
 634 unsigned int bond_get_num_tx_queues(void);
 635 int bond_netlink_init(void);
 636 void bond_netlink_fini(void);
 637 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond);
 638 const char *bond_slave_link_status(s8 link);
 639 struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev,
 640                                               struct net_device *end_dev,
 641                                               int level);
 642 int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave);
 643 void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay);
 644 void bond_work_init_all(struct bonding *bond);
 645
 646 #ifdef CONFIG_PROC_FS
 647 void bond_create_proc_entry(struct bonding *bond);
 648 void bond_remove_proc_entry(struct bonding *bond);
 649 void bond_create_proc_dir(struct bond_net *bn);
 650 void bond_destroy_proc_dir(struct bond_net *bn);
 651 #else
 652 static inline void bond_create_proc_entry(struct bonding *bond)
 653 {
 654 }
 655
 656 static inline void bond_remove_proc_entry(struct bonding *bond)
 657 {
 658 }
 659
 660 static inline void bond_create_proc_dir(struct bond_net *bn)
 661 {
 662 }
 663
 664 static inline void bond_destroy_proc_dir(struct bond_net *bn)
 665 {
 666 }
 667 #endif
 668
 669 static inline struct slave *bond_slave_has_mac(struct bonding *bond,
 670                                                const u8 *mac)
 671 {
 672         struct list_head *iter;
 673         struct slave *tmp;
 674
 675         bond_for_each_slave(bond, tmp, iter)
 676                 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
 677                         return tmp;
 678
 679         return NULL;
 680 }
 681
 682 /* Caller must hold rcu_read_lock() for read */
 683 static inline struct slave *bond_slave_has_mac_rcu(struct bonding *bond,
 684                                                const u8 *mac)
 685 {
 686         struct list_head *iter;
 687         struct slave *tmp;
 688
 689         bond_for_each_slave_rcu(bond, tmp, iter)
 690                 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
 691                         return tmp;
 692
 693         return NULL;
 694 }
 695
 696 /* Caller must hold rcu_read_lock() for read */
 697 static inline bool bond_slave_has_mac_rx(struct bonding *bond, const u8 *mac)
 698 {
 699         struct list_head *iter;
 700         struct slave *tmp;
 701         struct netdev_hw_addr *ha;
 702
 703         bond_for_each_slave_rcu(bond, tmp, iter)
 704                 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
 705                         return true;
 706
 707         if (netdev_uc_empty(bond->dev))
 708                 return false;
 709
 710         netdev_for_each_uc_addr(ha, bond->dev)
 711                 if (ether_addr_equal_64bits(mac, ha->addr))
 712                         return true;
 713
 714         return false;
 715 }
 716
 717 /* Check if the ip is present in arp ip list, or first free slot if ip == 0
 718  * Returns -1 if not found, index if found
 719  */
 720 static inline int bond_get_targets_ip(__be32 *targets, __be32 ip)
 721 {
 722         int i;
 723
 724         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
 725                 if (targets[i] == ip)
 726                         return i;
 727                 else if (targets[i] == 0)
 728                         break;
 729
 730         return -1;
 731 }
 732
 733 /* exported from bond_main.c */
 734 extern unsigned int bond_net_id;
 735 extern const struct bond_parm_tbl bond_lacp_tbl[];
 736 extern const struct bond_parm_tbl xmit_hashtype_tbl[];
 737 extern const struct bond_parm_tbl arp_validate_tbl[];
 738 extern const struct bond_parm_tbl arp_all_targets_tbl[];
 739 extern const struct bond_parm_tbl fail_over_mac_tbl[];
 740 extern const struct bond_parm_tbl pri_reselect_tbl[];
 741 extern struct bond_parm_tbl ad_select_tbl[];
 742
 743 /* exported from bond_netlink.c */
 744 extern struct rtnl_link_ops bond_link_ops;
 745
 746 static inline void bond_tx_drop(struct net_device *dev, struct sk_buff *skb)
 747 {
 748         atomic_long_inc(&dev->tx_dropped);
 749         dev_kfree_skb_any(skb);
 750 }
 751
 752 #endif /* _NET_BONDING_H */