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