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 DRV_VERSION     "3.7.1"
  34 #define DRV_RELDATE     "April 27, 2011"
  35 #define DRV_NAME        "bonding"
  36 #define DRV_DESCRIPTION "Ethernet Channel Bonding Driver"
  37
  38 #define bond_version DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n"
  39
  40 #define BOND_MAX_ARP_TARGETS    16
  41
  42 #define BOND_DEFAULT_MIIMON     100
  43
  44 /*
  45  * Less bad way to call ioctl from within the kernel; this needs to be
  46  * done some other way to get the call out of interrupt context.
  47  * Needs "ioctl" variable to be supplied by calling context.
  48  */
  49 #define IOCTL(dev, arg, cmd) ({         \
  50         int res = 0;                    \
  51         mm_segment_t fs = get_fs();     \
  52         set_fs(get_ds());               \
  53         res = ioctl(dev, arg, cmd);     \
  54         set_fs(fs);                     \
  55         res; })
  56
  57 #define BOND_MODE(bond) ((bond)->params.mode)
  58
  59 /* slave list primitives */
  60 #define bond_slave_list(bond) (&(bond)->dev->adj_list.lower)
  61
  62 #define bond_has_slaves(bond) !list_empty(bond_slave_list(bond))
  63
  64 /* IMPORTANT: bond_first/last_slave can return NULL in case of an empty list */
  65 #define bond_first_slave(bond) \
  66         (bond_has_slaves(bond) ? \
  67                 netdev_adjacent_get_private(bond_slave_list(bond)->next) : \
  68                 NULL)
  69 #define bond_last_slave(bond) \
  70         (bond_has_slaves(bond) ? \
  71                 netdev_adjacent_get_private(bond_slave_list(bond)->prev) : \
  72                 NULL)
  73
  74 /* Caller must have rcu_read_lock */
  75 #define bond_first_slave_rcu(bond) \
  76         netdev_lower_get_first_private_rcu(bond->dev)
  77
  78 #define bond_is_first_slave(bond, pos) (pos == bond_first_slave(bond))
  79 #define bond_is_last_slave(bond, pos) (pos == bond_last_slave(bond))
  80
  81 /**
  82  * bond_for_each_slave - iterate over all slaves
  83  * @bond:       the bond holding this list
  84  * @pos:        current slave
  85  * @iter:       list_head * iterator
  86  *
  87  * Caller must hold RTNL
  88  */
  89 #define bond_for_each_slave(bond, pos, iter) \
  90         netdev_for_each_lower_private((bond)->dev, pos, iter)
  91
  92 /* Caller must have rcu_read_lock */
  93 #define bond_for_each_slave_rcu(bond, pos, iter) \
  94         netdev_for_each_lower_private_rcu((bond)->dev, pos, iter)
  95
  96 #ifdef CONFIG_NET_POLL_CONTROLLER
  97 extern atomic_t netpoll_block_tx;
  98
  99 static inline void block_netpoll_tx(void)
 100 {
 101         atomic_inc(&netpoll_block_tx);
 102 }
 103
 104 static inline void unblock_netpoll_tx(void)
 105 {
 106         atomic_dec(&netpoll_block_tx);
 107 }
 108
 109 static inline int is_netpoll_tx_blocked(struct net_device *dev)
 110 {
 111         if (unlikely(netpoll_tx_running(dev)))
 112                 return atomic_read(&netpoll_block_tx);
 113         return 0;
 114 }
 115 #else
 116 #define block_netpoll_tx()
 117 #define unblock_netpoll_tx()
 118 #define is_netpoll_tx_blocked(dev) (0)
 119 #endif
 120
 121 struct bond_params {
 122         int mode;
 123         int xmit_policy;
 124         int miimon;
 125         u8 num_peer_notif;
 126         int arp_interval;
 127         int arp_validate;
 128         int arp_all_targets;
 129         int use_carrier;
 130         int fail_over_mac;
 131         int updelay;
 132         int downdelay;
 133         int lacp_fast;
 134         unsigned int min_links;
 135         int ad_select;
 136         char primary[IFNAMSIZ];
 137         int primary_reselect;
 138         __be32 arp_targets[BOND_MAX_ARP_TARGETS];
 139         int tx_queues;
 140         int all_slaves_active;
 141         int resend_igmp;
 142         int lp_interval;
 143         int packets_per_slave;
 144         int tlb_dynamic_lb;
 145         struct reciprocal_value reciprocal_packets_per_slave;
 146 };
 147
 148 struct bond_parm_tbl {
 149         char *modename;
 150         int mode;
 151 };
 152
 153 struct netdev_notify_work {
 154         struct delayed_work     work;
 155         struct net_device       *dev;
 156         struct netdev_bonding_info bonding_info;
 157 };
 158
 159 struct slave {
 160         struct net_device *dev; /* first - useful for panic debug */
 161         struct bonding *bond; /* our master */
 162         int    delay;
 163         /* all three in jiffies */
 164         unsigned long last_link_up;
 165         unsigned long last_rx;
 166         unsigned long target_last_arp_rx[BOND_MAX_ARP_TARGETS];
 167         s8     link;    /* one of BOND_LINK_XXXX */
 168         s8     new_link;
 169         u8     backup:1,   /* indicates backup slave. Value corresponds with
 170                               BOND_STATE_ACTIVE and BOND_STATE_BACKUP */
 171                inactive:1, /* indicates inactive slave */
 172                should_notify:1; /* indicateds whether the state changed */
 173         u8     duplex;
 174         u32    original_mtu;
 175         u32    link_failure_count;
 176         u32    speed;
 177         u16    queue_id;
 178         u8     perm_hwaddr[ETH_ALEN];
 179         struct ad_slave_info *ad_info;
 180         struct tlb_slave_info tlb_info;
 181 #ifdef CONFIG_NET_POLL_CONTROLLER
 182         struct netpoll *np;
 183 #endif
 184         struct kobject kobj;
 185         struct rtnl_link_stats64 slave_stats;
 186 };
 187
 188 struct bond_up_slave {
 189         unsigned int    count;
 190         struct rcu_head rcu;
 191         struct slave    *arr[0];
 192 };
 193
 194 /*
 195  * Link pseudo-state only used internally by monitors
 196  */
 197 #define BOND_LINK_NOCHANGE -1
 198
 199 /*
 200  * Here are the locking policies for the two bonding locks:
 201  * Get rcu_read_lock when reading or RTNL when writing slave list.
 202  */
 203 struct bonding {
 204         struct   net_device *dev; /* first - useful for panic debug */
 205         struct   slave __rcu *curr_active_slave;
 206         struct   slave __rcu *current_arp_slave;
 207         struct   slave __rcu *primary_slave;
 208         struct   bond_up_slave __rcu *slave_arr; /* Array of usable slaves */
 209         bool     force_primary;
 210         s32      slave_cnt; /* never change this value outside the attach/detach wrappers */
 211         int     (*recv_probe)(const struct sk_buff *, struct bonding *,
 212                               struct slave *);
 213         /* mode_lock is used for mode-specific locking needs, currently used by:
 214          * 3ad mode (4) - protect against running bond_3ad_unbind_slave() and
 215          *                bond_3ad_state_machine_handler() concurrently and also
 216          *                the access to the state machine shared variables.
 217          * TLB mode (5) - to sync the use and modifications of its hash table
 218          * ALB mode (6) - to sync the use and modifications of its hash table
 219          */
 220         spinlock_t mode_lock;
 221         u8       send_peer_notif;
 222         u8       igmp_retrans;
 223 #ifdef CONFIG_PROC_FS
 224         struct   proc_dir_entry *proc_entry;
 225         char     proc_file_name[IFNAMSIZ];
 226 #endif /* CONFIG_PROC_FS */
 227         struct   list_head bond_list;
 228         u32      rr_tx_counter;
 229         struct   ad_bond_info ad_info;
 230         struct   alb_bond_info alb_info;
 231         struct   bond_params params;
 232         struct   workqueue_struct *wq;
 233         struct   delayed_work mii_work;
 234         struct   delayed_work arp_work;
 235         struct   delayed_work alb_work;
 236         struct   delayed_work ad_work;
 237         struct   delayed_work mcast_work;
 238         struct   delayed_work slave_arr_work;
 239 #ifdef CONFIG_DEBUG_FS
 240         /* debugging support via debugfs */
 241         struct   dentry *debug_dir;
 242 #endif /* CONFIG_DEBUG_FS */
 243         struct rtnl_link_stats64 bond_stats;
 244 };
 245
 246 #define bond_slave_get_rcu(dev) \
 247         ((struct slave *) rcu_dereference(dev->rx_handler_data))
 248
 249 #define bond_slave_get_rtnl(dev) \
 250         ((struct slave *) rtnl_dereference(dev->rx_handler_data))
 251
 252 void bond_queue_slave_event(struct slave *slave);
 253
 254 struct bond_vlan_tag {
 255         __be16          vlan_proto;
 256         unsigned short  vlan_id;
 257 };
 258
 259 /**
 260  * Returns NULL if the net_device does not belong to any of the bond's slaves
 261  *
 262  * Caller must hold bond lock for read
 263  */
 264 static inline struct slave *bond_get_slave_by_dev(struct bonding *bond,
 265                                                   struct net_device *slave_dev)
 266 {
 267         return netdev_lower_dev_get_private(bond->dev, slave_dev);
 268 }
 269
 270 static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
 271 {
 272         return slave->bond;
 273 }
 274
 275 static inline bool bond_should_override_tx_queue(struct bonding *bond)
 276 {
 277         return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP ||
 278                BOND_MODE(bond) == BOND_MODE_ROUNDROBIN;
 279 }
 280
 281 static inline bool bond_is_lb(const struct bonding *bond)
 282 {
 283         return BOND_MODE(bond) == BOND_MODE_TLB ||
 284                BOND_MODE(bond) == BOND_MODE_ALB;
 285 }
 286
 287 static inline bool bond_is_nondyn_tlb(const struct bonding *bond)
 288 {
 289         return (BOND_MODE(bond) == BOND_MODE_TLB)  &&
 290                (bond->params.tlb_dynamic_lb == 0);
 291 }
 292
 293 static inline bool bond_mode_uses_xmit_hash(const struct bonding *bond)
 294 {
 295         return (BOND_MODE(bond) == BOND_MODE_8023AD ||
 296                 BOND_MODE(bond) == BOND_MODE_XOR ||
 297                 bond_is_nondyn_tlb(bond));
 298 }
 299
 300 static inline bool bond_mode_uses_arp(int mode)
 301 {
 302         return mode != BOND_MODE_8023AD && mode != BOND_MODE_TLB &&
 303                mode != BOND_MODE_ALB;
 304 }
 305
 306 static inline bool bond_mode_uses_primary(int mode)
 307 {
 308         return mode == BOND_MODE_ACTIVEBACKUP || mode == BOND_MODE_TLB ||
 309                mode == BOND_MODE_ALB;
 310 }
 311
 312 static inline bool bond_uses_primary(struct bonding *bond)
 313 {
 314         return bond_mode_uses_primary(BOND_MODE(bond));
 315 }
 316
 317 static inline bool bond_slave_is_up(struct slave *slave)
 318 {
 319         return netif_running(slave->dev) && netif_carrier_ok(slave->dev);
 320 }
 321
 322 static inline void bond_set_active_slave(struct slave *slave)
 323 {
 324         if (slave->backup) {
 325                 slave->backup = 0;
 326                 bond_queue_slave_event(slave);
 327                 rtmsg_ifinfo(RTM_NEWLINK, slave->dev, 0, GFP_ATOMIC);
 328         }
 329 }
 330
 331 static inline void bond_set_backup_slave(struct slave *slave)
 332 {
 333         if (!slave->backup) {
 334                 slave->backup = 1;
 335                 bond_queue_slave_event(slave);
 336                 rtmsg_ifinfo(RTM_NEWLINK, slave->dev, 0, GFP_ATOMIC);
 337         }
 338 }
 339
 340 static inline void bond_set_slave_state(struct slave *slave,
 341                                         int slave_state, bool notify)
 342 {
 343         if (slave->backup == slave_state)
 344                 return;
 345
 346         slave->backup = slave_state;
 347         if (notify) {
 348                 rtmsg_ifinfo(RTM_NEWLINK, slave->dev, 0, GFP_ATOMIC);
 349                 bond_queue_slave_event(slave);
 350                 slave->should_notify = 0;
 351         } else {
 352                 if (slave->should_notify)
 353                         slave->should_notify = 0;
 354                 else
 355                         slave->should_notify = 1;
 356         }
 357 }
 358
 359 static inline void bond_slave_state_change(struct bonding *bond)
 360 {
 361         struct list_head *iter;
 362         struct slave *tmp;
 363
 364         bond_for_each_slave(bond, tmp, iter) {
 365                 if (tmp->link == BOND_LINK_UP)
 366                         bond_set_active_slave(tmp);
 367                 else if (tmp->link == BOND_LINK_DOWN)
 368                         bond_set_backup_slave(tmp);
 369         }
 370 }
 371
 372 static inline void bond_slave_state_notify(struct bonding *bond)
 373 {
 374         struct list_head *iter;
 375         struct slave *tmp;
 376
 377         bond_for_each_slave(bond, tmp, iter) {
 378                 if (tmp->should_notify) {
 379                         rtmsg_ifinfo(RTM_NEWLINK, tmp->dev, 0, GFP_ATOMIC);
 380                         tmp->should_notify = 0;
 381                 }
 382         }
 383 }
 384
 385 static inline int bond_slave_state(struct slave *slave)
 386 {
 387         return slave->backup;
 388 }
 389
 390 static inline bool bond_is_active_slave(struct slave *slave)
 391 {
 392         return !bond_slave_state(slave);
 393 }
 394
 395 static inline bool bond_slave_can_tx(struct slave *slave)
 396 {
 397         return bond_slave_is_up(slave) && slave->link == BOND_LINK_UP &&
 398                bond_is_active_slave(slave);
 399 }
 400
 401 #define BOND_PRI_RESELECT_ALWAYS        0
 402 #define BOND_PRI_RESELECT_BETTER        1
 403 #define BOND_PRI_RESELECT_FAILURE       2
 404
 405 #define BOND_FOM_NONE                   0
 406 #define BOND_FOM_ACTIVE                 1
 407 #define BOND_FOM_FOLLOW                 2
 408
 409 #define BOND_ARP_TARGETS_ANY            0
 410 #define BOND_ARP_TARGETS_ALL            1
 411
 412 #define BOND_ARP_VALIDATE_NONE          0
 413 #define BOND_ARP_VALIDATE_ACTIVE        (1 << BOND_STATE_ACTIVE)
 414 #define BOND_ARP_VALIDATE_BACKUP        (1 << BOND_STATE_BACKUP)
 415 #define BOND_ARP_VALIDATE_ALL           (BOND_ARP_VALIDATE_ACTIVE | \
 416                                          BOND_ARP_VALIDATE_BACKUP)
 417 #define BOND_ARP_FILTER                 (BOND_ARP_VALIDATE_ALL + 1)
 418 #define BOND_ARP_FILTER_ACTIVE          (BOND_ARP_VALIDATE_ACTIVE | \
 419                                          BOND_ARP_FILTER)
 420 #define BOND_ARP_FILTER_BACKUP          (BOND_ARP_VALIDATE_BACKUP | \
 421                                          BOND_ARP_FILTER)
 422
 423 #define BOND_SLAVE_NOTIFY_NOW           true
 424 #define BOND_SLAVE_NOTIFY_LATER         false
 425
 426 static inline int slave_do_arp_validate(struct bonding *bond,
 427                                         struct slave *slave)
 428 {
 429         return bond->params.arp_validate & (1 << bond_slave_state(slave));
 430 }
 431
 432 static inline int slave_do_arp_validate_only(struct bonding *bond)
 433 {
 434         return bond->params.arp_validate & BOND_ARP_FILTER;
 435 }
 436
 437 static inline int bond_is_ip_target_ok(__be32 addr)
 438 {
 439         return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr);
 440 }
 441
 442 /* Get the oldest arp which we've received on this slave for bond's
 443  * arp_targets.
 444  */
 445 static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond,
 446                                                        struct slave *slave)
 447 {
 448         int i = 1;
 449         unsigned long ret = slave->target_last_arp_rx[0];
 450
 451         for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++)
 452                 if (time_before(slave->target_last_arp_rx[i], ret))
 453                         ret = slave->target_last_arp_rx[i];
 454
 455         return ret;
 456 }
 457
 458 static inline unsigned long slave_last_rx(struct bonding *bond,
 459                                         struct slave *slave)
 460 {
 461         if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL)
 462                 return slave_oldest_target_arp_rx(bond, slave);
 463
 464         return slave->last_rx;
 465 }
 466
 467 #ifdef CONFIG_NET_POLL_CONTROLLER
 468 static inline void bond_netpoll_send_skb(const struct slave *slave,
 469                                          struct sk_buff *skb)
 470 {
 471         struct netpoll *np = slave->np;
 472
 473         if (np)
 474                 netpoll_send_skb(np, skb);
 475 }
 476 #else
 477 static inline void bond_netpoll_send_skb(const struct slave *slave,
 478                                          struct sk_buff *skb)
 479 {
 480 }
 481 #endif
 482
 483 static inline void bond_set_slave_inactive_flags(struct slave *slave,
 484                                                  bool notify)
 485 {
 486         if (!bond_is_lb(slave->bond))
 487                 bond_set_slave_state(slave, BOND_STATE_BACKUP, notify);
 488         if (!slave->bond->params.all_slaves_active)
 489                 slave->inactive = 1;
 490 }
 491
 492 static inline void bond_set_slave_active_flags(struct slave *slave,
 493                                                bool notify)
 494 {
 495         bond_set_slave_state(slave, BOND_STATE_ACTIVE, notify);
 496         slave->inactive = 0;
 497 }
 498
 499 static inline bool bond_is_slave_inactive(struct slave *slave)
 500 {
 501         return slave->inactive;
 502 }
 503
 504 static inline void bond_set_slave_link_state(struct slave *slave, int state)
 505 {
 506         slave->link = state;
 507         bond_queue_slave_event(slave);
 508 }
 509
 510 static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
 511 {
 512         struct in_device *in_dev;
 513         __be32 addr = 0;
 514
 515         rcu_read_lock();
 516         in_dev = __in_dev_get_rcu(dev);
 517
 518         if (in_dev)
 519                 addr = inet_confirm_addr(dev_net(dev), in_dev, dst, local,
 520                                          RT_SCOPE_HOST);
 521         rcu_read_unlock();
 522         return addr;
 523 }
 524
 525 struct bond_net {
 526         struct net              *net;   /* Associated network namespace */
 527         struct list_head        dev_list;
 528 #ifdef CONFIG_PROC_FS
 529         struct proc_dir_entry   *proc_dir;
 530 #endif
 531         struct class_attribute  class_attr_bonding_masters;
 532 };
 533
 534 int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond, struct slave *slave);
 535 void bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
 536 int bond_create(struct net *net, const char *name);
 537 int bond_create_sysfs(struct bond_net *net);
 538 void bond_destroy_sysfs(struct bond_net *net);
 539 void bond_prepare_sysfs_group(struct bonding *bond);
 540 int bond_sysfs_slave_add(struct slave *slave);
 541 void bond_sysfs_slave_del(struct slave *slave);
 542 int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev);
 543 int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
 544 u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb);
 545 int bond_set_carrier(struct bonding *bond);
 546 void bond_select_active_slave(struct bonding *bond);
 547 void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
 548 void bond_create_debugfs(void);
 549 void bond_destroy_debugfs(void);
 550 void bond_debug_register(struct bonding *bond);
 551 void bond_debug_unregister(struct bonding *bond);
 552 void bond_debug_reregister(struct bonding *bond);
 553 const char *bond_mode_name(int mode);
 554 void bond_setup(struct net_device *bond_dev);
 555 unsigned int bond_get_num_tx_queues(void);
 556 int bond_netlink_init(void);
 557 void bond_netlink_fini(void);
 558 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond);
 559 const char *bond_slave_link_status(s8 link);
 560 struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev,
 561                                               struct net_device *end_dev,
 562                                               int level);
 563 int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave);
 564 void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay);
 565
 566 #ifdef CONFIG_PROC_FS
 567 void bond_create_proc_entry(struct bonding *bond);
 568 void bond_remove_proc_entry(struct bonding *bond);
 569 void bond_create_proc_dir(struct bond_net *bn);
 570 void bond_destroy_proc_dir(struct bond_net *bn);
 571 #else
 572 static inline void bond_create_proc_entry(struct bonding *bond)
 573 {
 574 }
 575
 576 static inline void bond_remove_proc_entry(struct bonding *bond)
 577 {
 578 }
 579
 580 static inline void bond_create_proc_dir(struct bond_net *bn)
 581 {
 582 }
 583
 584 static inline void bond_destroy_proc_dir(struct bond_net *bn)
 585 {
 586 }
 587 #endif
 588
 589 static inline struct slave *bond_slave_has_mac(struct bonding *bond,
 590                                                const u8 *mac)
 591 {
 592         struct list_head *iter;
 593         struct slave *tmp;
 594
 595         bond_for_each_slave(bond, tmp, iter)
 596                 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
 597                         return tmp;
 598
 599         return NULL;
 600 }
 601
 602 /* Caller must hold rcu_read_lock() for read */
 603 static inline struct slave *bond_slave_has_mac_rcu(struct bonding *bond,
 604                                                const u8 *mac)
 605 {
 606         struct list_head *iter;
 607         struct slave *tmp;
 608
 609         bond_for_each_slave_rcu(bond, tmp, iter)
 610                 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
 611                         return tmp;
 612
 613         return NULL;
 614 }
 615
 616 /* Caller must hold rcu_read_lock() for read */
 617 static inline bool bond_slave_has_mac_rx(struct bonding *bond, const u8 *mac)
 618 {
 619         struct list_head *iter;
 620         struct slave *tmp;
 621         struct netdev_hw_addr *ha;
 622
 623         bond_for_each_slave_rcu(bond, tmp, iter)
 624                 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
 625                         return true;
 626
 627         if (netdev_uc_empty(bond->dev))
 628                 return false;
 629
 630         netdev_for_each_uc_addr(ha, bond->dev)
 631                 if (ether_addr_equal_64bits(mac, ha->addr))
 632                         return true;
 633
 634         return false;
 635 }
 636
 637 /* Check if the ip is present in arp ip list, or first free slot if ip == 0
 638  * Returns -1 if not found, index if found
 639  */
 640 static inline int bond_get_targets_ip(__be32 *targets, __be32 ip)
 641 {
 642         int i;
 643
 644         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
 645                 if (targets[i] == ip)
 646                         return i;
 647                 else if (targets[i] == 0)
 648                         break;
 649
 650         return -1;
 651 }
 652
 653 /* exported from bond_main.c */
 654 extern int bond_net_id;
 655 extern const struct bond_parm_tbl bond_lacp_tbl[];
 656 extern const struct bond_parm_tbl xmit_hashtype_tbl[];
 657 extern const struct bond_parm_tbl arp_validate_tbl[];
 658 extern const struct bond_parm_tbl arp_all_targets_tbl[];
 659 extern const struct bond_parm_tbl fail_over_mac_tbl[];
 660 extern const struct bond_parm_tbl pri_reselect_tbl[];
 661 extern struct bond_parm_tbl ad_select_tbl[];
 662
 663 /* exported from bond_netlink.c */
 664 extern struct rtnl_link_ops bond_link_ops;
 665
 666 static inline void bond_tx_drop(struct net_device *dev, struct sk_buff *skb)
 667 {
 668         atomic_long_inc(&dev->tx_dropped);
 669         dev_kfree_skb_any(skb);
 670 }
 671
 672 #endif /* _NET_BONDING_H */