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