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