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 /*
  38  * Less bad way to call ioctl from within the kernel; this needs to be
  39  * done some other way to get the call out of interrupt context.
  40  * Needs "ioctl" variable to be supplied by calling context.
  41  */
  42 #define IOCTL(dev, arg, cmd) ({         \
  43         int res = 0;                    \
  44         mm_segment_t fs = get_fs();     \
  45         set_fs(get_ds());               \
  46         res = ioctl(dev, arg, cmd);     \
  47         set_fs(fs);                     \
  48         res; })
  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 lacp_fast;
 127         unsigned int min_links;
 128         int ad_select;
 129         char primary[IFNAMSIZ];
 130         int primary_reselect;
 131         __be32 arp_targets[BOND_MAX_ARP_TARGETS];
 132         int tx_queues;
 133         int all_slaves_active;
 134         int resend_igmp;
 135         int lp_interval;
 136         int packets_per_slave;
 137         int tlb_dynamic_lb;
 138         struct reciprocal_value reciprocal_packets_per_slave;
 139         u16 ad_actor_sys_prio;
 140         u16 ad_user_port_key;
 141         u8 ad_actor_system[ETH_ALEN];
 142 };
 143
 144 struct bond_parm_tbl {
 145         char *modename;
 146         int mode;
 147 };
 148
 149 struct netdev_notify_work {
 150         struct delayed_work     work;
 151         struct net_device       *dev;
 152         struct netdev_bonding_info bonding_info;
 153 };
 154
 155 struct slave {
 156         struct net_device *dev; /* first - useful for panic debug */
 157         struct bonding *bond; /* our master */
 158         int    delay;
 159         /* all three in jiffies */
 160         unsigned long last_link_up;
 161         unsigned long last_rx;
 162         unsigned long target_last_arp_rx[BOND_MAX_ARP_TARGETS];
 163         s8     link;    /* one of BOND_LINK_XXXX */
 164         s8     new_link;
 165         u8     backup:1,   /* indicates backup slave. Value corresponds with
 166                               BOND_STATE_ACTIVE and BOND_STATE_BACKUP */
 167                inactive:1, /* indicates inactive slave */
 168                should_notify:1, /* indicates whether the state changed */
 169                should_notify_link:1; /* indicates whether the link changed */
 170         u8     duplex;
 171         u32    original_mtu;
 172         u32    link_failure_count;
 173         u32    speed;
 174         u16    queue_id;
 175         u8     perm_hwaddr[ETH_ALEN];
 176         struct ad_slave_info *ad_info;
 177         struct tlb_slave_info tlb_info;
 178 #ifdef CONFIG_NET_POLL_CONTROLLER
 179         struct netpoll *np;
 180 #endif
 181         struct kobject kobj;
 182         struct rtnl_link_stats64 slave_stats;
 183 };
 184
 185 struct bond_up_slave {
 186         unsigned int    count;
 187         struct rcu_head rcu;
 188         struct slave    *arr[0];
 189 };
 190
 191 /*
 192  * Link pseudo-state only used internally by monitors
 193  */
 194 #define BOND_LINK_NOCHANGE -1
 195
 196 /*
 197  * Here are the locking policies for the two bonding locks:
 198  * Get rcu_read_lock when reading or RTNL when writing slave list.
 199  */
 200 struct bonding {
 201         struct   net_device *dev; /* first - useful for panic debug */
 202         struct   slave __rcu *curr_active_slave;
 203         struct   slave __rcu *current_arp_slave;
 204         struct   slave __rcu *primary_slave;
 205         struct   bond_up_slave __rcu *slave_arr; /* Array of usable slaves */
 206         bool     force_primary;
 207         s32      slave_cnt; /* never change this value outside the attach/detach wrappers */
 208         int     (*recv_probe)(const struct sk_buff *, struct bonding *,
 209                               struct slave *);
 210         /* mode_lock is used for mode-specific locking needs, currently used by:
 211          * 3ad mode (4) - protect against running bond_3ad_unbind_slave() and
 212          *                bond_3ad_state_machine_handler() concurrently and also
 213          *                the access to the state machine shared variables.
 214          * TLB mode (5) - to sync the use and modifications of its hash table
 215          * ALB mode (6) - to sync the use and modifications of its hash table
 216          */
 217         spinlock_t mode_lock;
 218         spinlock_t stats_lock;
 219         u8       send_peer_notif;
 220         u8       igmp_retrans;
 221 #ifdef CONFIG_PROC_FS
 222         struct   proc_dir_entry *proc_entry;
 223         char     proc_file_name[IFNAMSIZ];
 224 #endif /* CONFIG_PROC_FS */
 225         struct   list_head bond_list;
 226         u32      rr_tx_counter;
 227         struct   ad_bond_info ad_info;
 228         struct   alb_bond_info alb_info;
 229         struct   bond_params params;
 230         struct   workqueue_struct *wq;
 231         struct   delayed_work mii_work;
 232         struct   delayed_work arp_work;
 233         struct   delayed_work alb_work;
 234         struct   delayed_work ad_work;
 235         struct   delayed_work mcast_work;
 236         struct   delayed_work slave_arr_work;
 237 #ifdef CONFIG_DEBUG_FS
 238         /* debugging support via debugfs */
 239         struct   dentry *debug_dir;
 240 #endif /* CONFIG_DEBUG_FS */
 241         struct rtnl_link_stats64 bond_stats;
 242 };
 243
 244 #define bond_slave_get_rcu(dev) \
 245         ((struct slave *) rcu_dereference(dev->rx_handler_data))
 246
 247 #define bond_slave_get_rtnl(dev) \
 248         ((struct slave *) rtnl_dereference(dev->rx_handler_data))
 249
 250 void bond_queue_slave_event(struct slave *slave);
 251 void bond_lower_state_changed(struct slave *slave);
 252
 253 struct bond_vlan_tag {
 254         __be16          vlan_proto;
 255         unsigned short  vlan_id;
 256 };
 257
 258 /**
 259  * Returns NULL if the net_device does not belong to any of the bond's slaves
 260  *
 261  * Caller must hold bond lock for read
 262  */
 263 static inline struct slave *bond_get_slave_by_dev(struct bonding *bond,
 264                                                   struct net_device *slave_dev)
 265 {
 266         return netdev_lower_dev_get_private(bond->dev, slave_dev);
 267 }
 268
 269 static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
 270 {
 271         return slave->bond;
 272 }
 273
 274 static inline bool bond_should_override_tx_queue(struct bonding *bond)
 275 {
 276         return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP ||
 277                BOND_MODE(bond) == BOND_MODE_ROUNDROBIN;
 278 }
 279
 280 static inline bool bond_is_lb(const struct bonding *bond)
 281 {
 282         return BOND_MODE(bond) == BOND_MODE_TLB ||
 283                BOND_MODE(bond) == BOND_MODE_ALB;
 284 }
 285
 286 static inline bool bond_is_nondyn_tlb(const struct bonding *bond)
 287 {
 288         return (BOND_MODE(bond) == BOND_MODE_TLB)  &&
 289                (bond->params.tlb_dynamic_lb == 0);
 290 }
 291
 292 static inline bool bond_mode_uses_xmit_hash(const struct bonding *bond)
 293 {
 294         return (BOND_MODE(bond) == BOND_MODE_8023AD ||
 295                 BOND_MODE(bond) == BOND_MODE_XOR ||
 296                 bond_is_nondyn_tlb(bond));
 297 }
 298
 299 static inline bool bond_mode_uses_arp(int mode)
 300 {
 301         return mode != BOND_MODE_8023AD && mode != BOND_MODE_TLB &&
 302                mode != BOND_MODE_ALB;
 303 }
 304
 305 static inline bool bond_mode_uses_primary(int mode)
 306 {
 307         return mode == BOND_MODE_ACTIVEBACKUP || mode == BOND_MODE_TLB ||
 308                mode == BOND_MODE_ALB;
 309 }
 310
 311 static inline bool bond_uses_primary(struct bonding *bond)
 312 {
 313         return bond_mode_uses_primary(BOND_MODE(bond));
 314 }
 315
 316 static inline struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
 317 {
 318         struct slave *slave = rcu_dereference(bond->curr_active_slave);
 319
 320         return bond_uses_primary(bond) && slave ? slave->dev : NULL;
 321 }
 322
 323 static inline bool bond_slave_is_up(struct slave *slave)
 324 {
 325         return netif_running(slave->dev) && netif_carrier_ok(slave->dev);
 326 }
 327
 328 static inline void bond_set_active_slave(struct slave *slave)
 329 {
 330         if (slave->backup) {
 331                 slave->backup = 0;
 332                 bond_queue_slave_event(slave);
 333                 bond_lower_state_changed(slave);
 334                 rtmsg_ifinfo(RTM_NEWLINK, slave->dev, 0, GFP_ATOMIC);
 335         }
 336 }
 337
 338 static inline void bond_set_backup_slave(struct slave *slave)
 339 {
 340         if (!slave->backup) {
 341                 slave->backup = 1;
 342                 bond_queue_slave_event(slave);
 343                 bond_lower_state_changed(slave);
 344                 rtmsg_ifinfo(RTM_NEWLINK, slave->dev, 0, GFP_ATOMIC);
 345         }
 346 }
 347
 348 static inline void bond_set_slave_state(struct slave *slave,
 349                                         int slave_state, bool notify)
 350 {
 351         if (slave->backup == slave_state)
 352                 return;
 353
 354         slave->backup = slave_state;
 355         if (notify) {
 356                 bond_lower_state_changed(slave);
 357                 rtmsg_ifinfo(RTM_NEWLINK, slave->dev, 0, GFP_ATOMIC);
 358                 bond_queue_slave_event(slave);
 359                 slave->should_notify = 0;
 360         } else {
 361                 if (slave->should_notify)
 362                         slave->should_notify = 0;
 363                 else
 364                         slave->should_notify = 1;
 365         }
 366 }
 367
 368 static inline void bond_slave_state_change(struct bonding *bond)
 369 {
 370         struct list_head *iter;
 371         struct slave *tmp;
 372
 373         bond_for_each_slave(bond, tmp, iter) {
 374                 if (tmp->link == BOND_LINK_UP)
 375                         bond_set_active_slave(tmp);
 376                 else if (tmp->link == BOND_LINK_DOWN)
 377                         bond_set_backup_slave(tmp);
 378         }
 379 }
 380
 381 static inline void bond_slave_state_notify(struct bonding *bond)
 382 {
 383         struct list_head *iter;
 384         struct slave *tmp;
 385
 386         bond_for_each_slave(bond, tmp, iter) {
 387                 if (tmp->should_notify) {
 388                         bond_lower_state_changed(tmp);
 389                         rtmsg_ifinfo(RTM_NEWLINK, tmp->dev, 0, GFP_ATOMIC);
 390                         tmp->should_notify = 0;
 391                 }
 392         }
 393 }
 394
 395 static inline int bond_slave_state(struct slave *slave)
 396 {
 397         return slave->backup;
 398 }
 399
 400 static inline bool bond_is_active_slave(struct slave *slave)
 401 {
 402         return !bond_slave_state(slave);
 403 }
 404
 405 static inline bool bond_slave_can_tx(struct slave *slave)
 406 {
 407         return bond_slave_is_up(slave) && slave->link == BOND_LINK_UP &&
 408                bond_is_active_slave(slave);
 409 }
 410
 411 #define BOND_PRI_RESELECT_ALWAYS        0
 412 #define BOND_PRI_RESELECT_BETTER        1
 413 #define BOND_PRI_RESELECT_FAILURE       2
 414
 415 #define BOND_FOM_NONE                   0
 416 #define BOND_FOM_ACTIVE                 1
 417 #define BOND_FOM_FOLLOW                 2
 418
 419 #define BOND_ARP_TARGETS_ANY            0
 420 #define BOND_ARP_TARGETS_ALL            1
 421
 422 #define BOND_ARP_VALIDATE_NONE          0
 423 #define BOND_ARP_VALIDATE_ACTIVE        (1 << BOND_STATE_ACTIVE)
 424 #define BOND_ARP_VALIDATE_BACKUP        (1 << BOND_STATE_BACKUP)
 425 #define BOND_ARP_VALIDATE_ALL           (BOND_ARP_VALIDATE_ACTIVE | \
 426                                          BOND_ARP_VALIDATE_BACKUP)
 427 #define BOND_ARP_FILTER                 (BOND_ARP_VALIDATE_ALL + 1)
 428 #define BOND_ARP_FILTER_ACTIVE          (BOND_ARP_VALIDATE_ACTIVE | \
 429                                          BOND_ARP_FILTER)
 430 #define BOND_ARP_FILTER_BACKUP          (BOND_ARP_VALIDATE_BACKUP | \
 431                                          BOND_ARP_FILTER)
 432
 433 #define BOND_SLAVE_NOTIFY_NOW           true
 434 #define BOND_SLAVE_NOTIFY_LATER         false
 435
 436 static inline int slave_do_arp_validate(struct bonding *bond,
 437                                         struct slave *slave)
 438 {
 439         return bond->params.arp_validate & (1 << bond_slave_state(slave));
 440 }
 441
 442 static inline int slave_do_arp_validate_only(struct bonding *bond)
 443 {
 444         return bond->params.arp_validate & BOND_ARP_FILTER;
 445 }
 446
 447 static inline int bond_is_ip_target_ok(__be32 addr)
 448 {
 449         return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr);
 450 }
 451
 452 /* Get the oldest arp which we've received on this slave for bond's
 453  * arp_targets.
 454  */
 455 static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond,
 456                                                        struct slave *slave)
 457 {
 458         int i = 1;
 459         unsigned long ret = slave->target_last_arp_rx[0];
 460
 461         for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++)
 462                 if (time_before(slave->target_last_arp_rx[i], ret))
 463                         ret = slave->target_last_arp_rx[i];
 464
 465         return ret;
 466 }
 467
 468 static inline unsigned long slave_last_rx(struct bonding *bond,
 469                                         struct slave *slave)
 470 {
 471         if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL)
 472                 return slave_oldest_target_arp_rx(bond, slave);
 473
 474         return slave->last_rx;
 475 }
 476
 477 #ifdef CONFIG_NET_POLL_CONTROLLER
 478 static inline void bond_netpoll_send_skb(const struct slave *slave,
 479                                          struct sk_buff *skb)
 480 {
 481         struct netpoll *np = slave->np;
 482
 483         if (np)
 484                 netpoll_send_skb(np, skb);
 485 }
 486 #else
 487 static inline void bond_netpoll_send_skb(const struct slave *slave,
 488                                          struct sk_buff *skb)
 489 {
 490 }
 491 #endif
 492
 493 static inline void bond_set_slave_inactive_flags(struct slave *slave,
 494                                                  bool notify)
 495 {
 496         if (!bond_is_lb(slave->bond))
 497                 bond_set_slave_state(slave, BOND_STATE_BACKUP, notify);
 498         if (!slave->bond->params.all_slaves_active)
 499                 slave->inactive = 1;
 500 }
 501
 502 static inline void bond_set_slave_active_flags(struct slave *slave,
 503                                                bool notify)
 504 {
 505         bond_set_slave_state(slave, BOND_STATE_ACTIVE, notify);
 506         slave->inactive = 0;
 507 }
 508
 509 static inline bool bond_is_slave_inactive(struct slave *slave)
 510 {
 511         return slave->inactive;
 512 }
 513
 514 static inline void bond_set_slave_link_state(struct slave *slave, int state,
 515                                              bool notify)
 516 {
 517         if (slave->link == state)
 518                 return;
 519
 520         slave->link = state;
 521         if (notify) {
 522                 bond_queue_slave_event(slave);
 523                 bond_lower_state_changed(slave);
 524                 slave->should_notify_link = 0;
 525         } else {
 526                 if (slave->should_notify_link)
 527                         slave->should_notify_link = 0;
 528                 else
 529                         slave->should_notify_link = 1;
 530         }
 531 }
 532
 533 static inline void bond_slave_link_notify(struct bonding *bond)
 534 {
 535         struct list_head *iter;
 536         struct slave *tmp;
 537
 538         bond_for_each_slave(bond, tmp, iter) {
 539                 if (tmp->should_notify_link) {
 540                         bond_queue_slave_event(tmp);
 541                         bond_lower_state_changed(tmp);
 542                         tmp->should_notify_link = 0;
 543                 }
 544         }
 545 }
 546
 547 static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
 548 {
 549         struct in_device *in_dev;
 550         __be32 addr = 0;
 551
 552         rcu_read_lock();
 553         in_dev = __in_dev_get_rcu(dev);
 554
 555         if (in_dev)
 556                 addr = inet_confirm_addr(dev_net(dev), in_dev, dst, local,
 557                                          RT_SCOPE_HOST);
 558         rcu_read_unlock();
 559         return addr;
 560 }
 561
 562 struct bond_net {
 563         struct net              *net;   /* Associated network namespace */
 564         struct list_head        dev_list;
 565 #ifdef CONFIG_PROC_FS
 566         struct proc_dir_entry   *proc_dir;
 567 #endif
 568         struct class_attribute  class_attr_bonding_masters;
 569 };
 570
 571 int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond, struct slave *slave);
 572 void bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
 573 int bond_create(struct net *net, const char *name);
 574 int bond_create_sysfs(struct bond_net *net);
 575 void bond_destroy_sysfs(struct bond_net *net);
 576 void bond_prepare_sysfs_group(struct bonding *bond);
 577 int bond_sysfs_slave_add(struct slave *slave);
 578 void bond_sysfs_slave_del(struct slave *slave);
 579 int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev);
 580 int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
 581 u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb);
 582 int bond_set_carrier(struct bonding *bond);
 583 void bond_select_active_slave(struct bonding *bond);
 584 void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
 585 void bond_create_debugfs(void);
 586 void bond_destroy_debugfs(void);
 587 void bond_debug_register(struct bonding *bond);
 588 void bond_debug_unregister(struct bonding *bond);
 589 void bond_debug_reregister(struct bonding *bond);
 590 const char *bond_mode_name(int mode);
 591 void bond_setup(struct net_device *bond_dev);
 592 unsigned int bond_get_num_tx_queues(void);
 593 int bond_netlink_init(void);
 594 void bond_netlink_fini(void);
 595 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond);
 596 const char *bond_slave_link_status(s8 link);
 597 struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev,
 598                                               struct net_device *end_dev,
 599                                               int level);
 600 int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave);
 601 void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay);
 602
 603 #ifdef CONFIG_PROC_FS
 604 void bond_create_proc_entry(struct bonding *bond);
 605 void bond_remove_proc_entry(struct bonding *bond);
 606 void bond_create_proc_dir(struct bond_net *bn);
 607 void bond_destroy_proc_dir(struct bond_net *bn);
 608 #else
 609 static inline void bond_create_proc_entry(struct bonding *bond)
 610 {
 611 }
 612
 613 static inline void bond_remove_proc_entry(struct bonding *bond)
 614 {
 615 }
 616
 617 static inline void bond_create_proc_dir(struct bond_net *bn)
 618 {
 619 }
 620
 621 static inline void bond_destroy_proc_dir(struct bond_net *bn)
 622 {
 623 }
 624 #endif
 625
 626 static inline struct slave *bond_slave_has_mac(struct bonding *bond,
 627                                                const u8 *mac)
 628 {
 629         struct list_head *iter;
 630         struct slave *tmp;
 631
 632         bond_for_each_slave(bond, tmp, iter)
 633                 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
 634                         return tmp;
 635
 636         return NULL;
 637 }
 638
 639 /* Caller must hold rcu_read_lock() for read */
 640 static inline struct slave *bond_slave_has_mac_rcu(struct bonding *bond,
 641                                                const u8 *mac)
 642 {
 643         struct list_head *iter;
 644         struct slave *tmp;
 645
 646         bond_for_each_slave_rcu(bond, tmp, iter)
 647                 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
 648                         return tmp;
 649
 650         return NULL;
 651 }
 652
 653 /* Caller must hold rcu_read_lock() for read */
 654 static inline bool bond_slave_has_mac_rx(struct bonding *bond, const u8 *mac)
 655 {
 656         struct list_head *iter;
 657         struct slave *tmp;
 658         struct netdev_hw_addr *ha;
 659
 660         bond_for_each_slave_rcu(bond, tmp, iter)
 661                 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
 662                         return true;
 663
 664         if (netdev_uc_empty(bond->dev))
 665                 return false;
 666
 667         netdev_for_each_uc_addr(ha, bond->dev)
 668                 if (ether_addr_equal_64bits(mac, ha->addr))
 669                         return true;
 670
 671         return false;
 672 }
 673
 674 /* Check if the ip is present in arp ip list, or first free slot if ip == 0
 675  * Returns -1 if not found, index if found
 676  */
 677 static inline int bond_get_targets_ip(__be32 *targets, __be32 ip)
 678 {
 679         int i;
 680
 681         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
 682                 if (targets[i] == ip)
 683                         return i;
 684                 else if (targets[i] == 0)
 685                         break;
 686
 687         return -1;
 688 }
 689
 690 /* exported from bond_main.c */
 691 extern int bond_net_id;
 692 extern const struct bond_parm_tbl bond_lacp_tbl[];
 693 extern const struct bond_parm_tbl xmit_hashtype_tbl[];
 694 extern const struct bond_parm_tbl arp_validate_tbl[];
 695 extern const struct bond_parm_tbl arp_all_targets_tbl[];
 696 extern const struct bond_parm_tbl fail_over_mac_tbl[];
 697 extern const struct bond_parm_tbl pri_reselect_tbl[];
 698 extern struct bond_parm_tbl ad_select_tbl[];
 699
 700 /* exported from bond_netlink.c */
 701 extern struct rtnl_link_ops bond_link_ops;
 702
 703 static inline void bond_tx_drop(struct net_device *dev, struct sk_buff *skb)
 704 {
 705         atomic_long_inc(&dev->tx_dropped);
 706         dev_kfree_skb_any(skb);
 707 }
 708
 709 #endif /* _NET_BONDING_H */