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 slave_info(bond_dev, slave_dev, fmt, ...) \
  42         netdev_info(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
  43 #define slave_warn(bond_dev, slave_dev, fmt, ...) \
  44         netdev_warn(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
  45 #define slave_dbg(bond_dev, slave_dev, fmt, ...) \
  46         netdev_dbg(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
  47 #define slave_err(bond_dev, slave_dev, fmt, ...) \
  48         netdev_err(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
  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 peer_notif_delay;
 127         int lacp_fast;
 128         unsigned int min_links;
 129         int ad_select;
 130         char primary[IFNAMSIZ];
 131         int primary_reselect;
 132         __be32 arp_targets[BOND_MAX_ARP_TARGETS];
 133         int tx_queues;
 134         int all_slaves_active;
 135         int resend_igmp;
 136         int lp_interval;
 137         int packets_per_slave;
 138         int tlb_dynamic_lb;
 139         struct reciprocal_value reciprocal_packets_per_slave;
 140         u16 ad_actor_sys_prio;
 141         u16 ad_user_port_key;
 142
 143         /* 2 bytes of padding : see ether_addr_equal_64bits() */
 144         u8 ad_actor_system[ETH_ALEN + 2];
 145 };
 146
 147 struct bond_parm_tbl {
 148         char *modename;
 149         int mode;
 150 };
 151
 152 struct slave {
 153         struct net_device *dev; /* first - useful for panic debug */
 154         struct bonding *bond; /* our master */
 155         int    delay;
 156         /* all three in jiffies */
 157         unsigned long last_link_up;
 158         unsigned long last_rx;
 159         unsigned long target_last_arp_rx[BOND_MAX_ARP_TARGETS];
 160         s8     link;            /* one of BOND_LINK_XXXX */
 161         s8     link_new_state;  /* one of BOND_LINK_XXXX */
 162         s8     new_link;
 163         u8     backup:1,   /* indicates backup slave. Value corresponds with
 164                               BOND_STATE_ACTIVE and BOND_STATE_BACKUP */
 165                inactive:1, /* indicates inactive slave */
 166                should_notify:1, /* indicates whether the state changed */
 167                should_notify_link:1; /* indicates whether the link changed */
 168         u8     duplex;
 169         u32    original_mtu;
 170         u32    link_failure_count;
 171         u32    speed;
 172         u16    queue_id;
 173         u8     perm_hwaddr[MAX_ADDR_LEN];
 174         struct ad_slave_info *ad_info;
 175         struct tlb_slave_info tlb_info;
 176 #ifdef CONFIG_NET_POLL_CONTROLLER
 177         struct netpoll *np;
 178 #endif
 179         struct delayed_work notify_work;
 180         struct kobject kobj;
 181         struct rtnl_link_stats64 slave_stats;
 182 };
 183
 184 struct bond_up_slave {
 185         unsigned int    count;
 186         struct rcu_head rcu;
 187         struct slave    *arr[0];
 188 };
 189
 190 /*
 191  * Link pseudo-state only used internally by monitors
 192  */
 193 #define BOND_LINK_NOCHANGE -1
 194
 195 /*
 196  * Here are the locking policies for the two bonding locks:
 197  * Get rcu_read_lock when reading or RTNL when writing slave list.
 198  */
 199 struct bonding {
 200         struct   net_device *dev; /* first - useful for panic debug */
 201         struct   slave __rcu *curr_active_slave;
 202         struct   slave __rcu *current_arp_slave;
 203         struct   slave __rcu *primary_slave;
 204         struct   bond_up_slave __rcu *slave_arr; /* Array of usable slaves */
 205         bool     force_primary;
 206         u32      nest_level;
 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_needs_speed_duplex(const struct bonding *bond)
 287 {
 288         return BOND_MODE(bond) == BOND_MODE_8023AD || bond_is_lb(bond);
 289 }
 290
 291 static inline bool bond_is_nondyn_tlb(const struct bonding *bond)
 292 {
 293         return (bond_is_lb(bond) && bond->params.tlb_dynamic_lb == 0);
 294 }
 295
 296 static inline bool bond_mode_can_use_xmit_hash(const struct bonding *bond)
 297 {
 298         return (BOND_MODE(bond) == BOND_MODE_8023AD ||
 299                 BOND_MODE(bond) == BOND_MODE_XOR ||
 300                 BOND_MODE(bond) == BOND_MODE_TLB ||
 301                 BOND_MODE(bond) == BOND_MODE_ALB);
 302 }
 303
 304 static inline bool bond_mode_uses_xmit_hash(const struct bonding *bond)
 305 {
 306         return (BOND_MODE(bond) == BOND_MODE_8023AD ||
 307                 BOND_MODE(bond) == BOND_MODE_XOR ||
 308                 bond_is_nondyn_tlb(bond));
 309 }
 310
 311 static inline bool bond_mode_uses_arp(int mode)
 312 {
 313         return mode != BOND_MODE_8023AD && mode != BOND_MODE_TLB &&
 314                mode != BOND_MODE_ALB;
 315 }
 316
 317 static inline bool bond_mode_uses_primary(int mode)
 318 {
 319         return mode == BOND_MODE_ACTIVEBACKUP || mode == BOND_MODE_TLB ||
 320                mode == BOND_MODE_ALB;
 321 }
 322
 323 static inline bool bond_uses_primary(struct bonding *bond)
 324 {
 325         return bond_mode_uses_primary(BOND_MODE(bond));
 326 }
 327
 328 static inline struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
 329 {
 330         struct slave *slave = rcu_dereference(bond->curr_active_slave);
 331
 332         return bond_uses_primary(bond) && slave ? slave->dev : NULL;
 333 }
 334
 335 static inline bool bond_slave_is_up(struct slave *slave)
 336 {
 337         return netif_running(slave->dev) && netif_carrier_ok(slave->dev);
 338 }
 339
 340 static inline void bond_set_active_slave(struct slave *slave)
 341 {
 342         if (slave->backup) {
 343                 slave->backup = 0;
 344                 bond_queue_slave_event(slave);
 345                 bond_lower_state_changed(slave);
 346         }
 347 }
 348
 349 static inline void bond_set_backup_slave(struct slave *slave)
 350 {
 351         if (!slave->backup) {
 352                 slave->backup = 1;
 353                 bond_queue_slave_event(slave);
 354                 bond_lower_state_changed(slave);
 355         }
 356 }
 357
 358 static inline void bond_set_slave_state(struct slave *slave,
 359                                         int slave_state, bool notify)
 360 {
 361         if (slave->backup == slave_state)
 362                 return;
 363
 364         slave->backup = slave_state;
 365         if (notify) {
 366                 bond_lower_state_changed(slave);
 367                 bond_queue_slave_event(slave);
 368                 slave->should_notify = 0;
 369         } else {
 370                 if (slave->should_notify)
 371                         slave->should_notify = 0;
 372                 else
 373                         slave->should_notify = 1;
 374         }
 375 }
 376
 377 static inline void bond_slave_state_change(struct bonding *bond)
 378 {
 379         struct list_head *iter;
 380         struct slave *tmp;
 381
 382         bond_for_each_slave(bond, tmp, iter) {
 383                 if (tmp->link == BOND_LINK_UP)
 384                         bond_set_active_slave(tmp);
 385                 else if (tmp->link == BOND_LINK_DOWN)
 386                         bond_set_backup_slave(tmp);
 387         }
 388 }
 389
 390 static inline void bond_slave_state_notify(struct bonding *bond)
 391 {
 392         struct list_head *iter;
 393         struct slave *tmp;
 394
 395         bond_for_each_slave(bond, tmp, iter) {
 396                 if (tmp->should_notify) {
 397                         bond_lower_state_changed(tmp);
 398                         tmp->should_notify = 0;
 399                 }
 400         }
 401 }
 402
 403 static inline int bond_slave_state(struct slave *slave)
 404 {
 405         return slave->backup;
 406 }
 407
 408 static inline bool bond_is_active_slave(struct slave *slave)
 409 {
 410         return !bond_slave_state(slave);
 411 }
 412
 413 static inline bool bond_slave_can_tx(struct slave *slave)
 414 {
 415         return bond_slave_is_up(slave) && slave->link == BOND_LINK_UP &&
 416                bond_is_active_slave(slave);
 417 }
 418
 419 static inline bool bond_is_active_slave_dev(const struct net_device *slave_dev)
 420 {
 421         struct slave *slave;
 422         bool active;
 423
 424         rcu_read_lock();
 425         slave = bond_slave_get_rcu(slave_dev);
 426         active = bond_is_active_slave(slave);
 427         rcu_read_unlock();
 428
 429         return active;
 430 }
 431
 432 static inline void bond_hw_addr_copy(u8 *dst, const u8 *src, unsigned int len)
 433 {
 434         if (len == ETH_ALEN) {
 435                 ether_addr_copy(dst, src);
 436                 return;
 437         }
 438
 439         memcpy(dst, src, len);
 440 }
 441
 442 #define BOND_PRI_RESELECT_ALWAYS        0
 443 #define BOND_PRI_RESELECT_BETTER        1
 444 #define BOND_PRI_RESELECT_FAILURE       2
 445
 446 #define BOND_FOM_NONE                   0
 447 #define BOND_FOM_ACTIVE                 1
 448 #define BOND_FOM_FOLLOW                 2
 449
 450 #define BOND_ARP_TARGETS_ANY            0
 451 #define BOND_ARP_TARGETS_ALL            1
 452
 453 #define BOND_ARP_VALIDATE_NONE          0
 454 #define BOND_ARP_VALIDATE_ACTIVE        (1 << BOND_STATE_ACTIVE)
 455 #define BOND_ARP_VALIDATE_BACKUP        (1 << BOND_STATE_BACKUP)
 456 #define BOND_ARP_VALIDATE_ALL           (BOND_ARP_VALIDATE_ACTIVE | \
 457                                          BOND_ARP_VALIDATE_BACKUP)
 458 #define BOND_ARP_FILTER                 (BOND_ARP_VALIDATE_ALL + 1)
 459 #define BOND_ARP_FILTER_ACTIVE          (BOND_ARP_VALIDATE_ACTIVE | \
 460                                          BOND_ARP_FILTER)
 461 #define BOND_ARP_FILTER_BACKUP          (BOND_ARP_VALIDATE_BACKUP | \
 462                                          BOND_ARP_FILTER)
 463
 464 #define BOND_SLAVE_NOTIFY_NOW           true
 465 #define BOND_SLAVE_NOTIFY_LATER         false
 466
 467 static inline int slave_do_arp_validate(struct bonding *bond,
 468                                         struct slave *slave)
 469 {
 470         return bond->params.arp_validate & (1 << bond_slave_state(slave));
 471 }
 472
 473 static inline int slave_do_arp_validate_only(struct bonding *bond)
 474 {
 475         return bond->params.arp_validate & BOND_ARP_FILTER;
 476 }
 477
 478 static inline int bond_is_ip_target_ok(__be32 addr)
 479 {
 480         return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr);
 481 }
 482
 483 /* Get the oldest arp which we've received on this slave for bond's
 484  * arp_targets.
 485  */
 486 static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond,
 487                                                        struct slave *slave)
 488 {
 489         int i = 1;
 490         unsigned long ret = slave->target_last_arp_rx[0];
 491
 492         for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++)
 493                 if (time_before(slave->target_last_arp_rx[i], ret))
 494                         ret = slave->target_last_arp_rx[i];
 495
 496         return ret;
 497 }
 498
 499 static inline unsigned long slave_last_rx(struct bonding *bond,
 500                                         struct slave *slave)
 501 {
 502         if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL)
 503                 return slave_oldest_target_arp_rx(bond, slave);
 504
 505         return slave->last_rx;
 506 }
 507
 508 #ifdef CONFIG_NET_POLL_CONTROLLER
 509 static inline void bond_netpoll_send_skb(const struct slave *slave,
 510                                          struct sk_buff *skb)
 511 {
 512         struct netpoll *np = slave->np;
 513
 514         if (np)
 515                 netpoll_send_skb(np, skb);
 516 }
 517 #else
 518 static inline void bond_netpoll_send_skb(const struct slave *slave,
 519                                          struct sk_buff *skb)
 520 {
 521 }
 522 #endif
 523
 524 static inline void bond_set_slave_inactive_flags(struct slave *slave,
 525                                                  bool notify)
 526 {
 527         if (!bond_is_lb(slave->bond))
 528                 bond_set_slave_state(slave, BOND_STATE_BACKUP, notify);
 529         if (!slave->bond->params.all_slaves_active)
 530                 slave->inactive = 1;
 531 }
 532
 533 static inline void bond_set_slave_active_flags(struct slave *slave,
 534                                                bool notify)
 535 {
 536         bond_set_slave_state(slave, BOND_STATE_ACTIVE, notify);
 537         slave->inactive = 0;
 538 }
 539
 540 static inline bool bond_is_slave_inactive(struct slave *slave)
 541 {
 542         return slave->inactive;
 543 }
 544
 545 static inline void bond_propose_link_state(struct slave *slave, int state)
 546 {
 547         slave->link_new_state = state;
 548 }
 549
 550 static inline void bond_commit_link_state(struct slave *slave, bool notify)
 551 {
 552         if (slave->link == slave->link_new_state)
 553                 return;
 554
 555         slave->link = slave->link_new_state;
 556         if (notify) {
 557                 bond_queue_slave_event(slave);
 558                 bond_lower_state_changed(slave);
 559                 slave->should_notify_link = 0;
 560         } else {
 561                 if (slave->should_notify_link)
 562                         slave->should_notify_link = 0;
 563                 else
 564                         slave->should_notify_link = 1;
 565         }
 566 }
 567
 568 static inline void bond_set_slave_link_state(struct slave *slave, int state,
 569                                              bool notify)
 570 {
 571         bond_propose_link_state(slave, state);
 572         bond_commit_link_state(slave, notify);
 573 }
 574
 575 static inline void bond_slave_link_notify(struct bonding *bond)
 576 {
 577         struct list_head *iter;
 578         struct slave *tmp;
 579
 580         bond_for_each_slave(bond, tmp, iter) {
 581                 if (tmp->should_notify_link) {
 582                         bond_queue_slave_event(tmp);
 583                         bond_lower_state_changed(tmp);
 584                         tmp->should_notify_link = 0;
 585                 }
 586         }
 587 }
 588
 589 static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
 590 {
 591         struct in_device *in_dev;
 592         __be32 addr = 0;
 593
 594         rcu_read_lock();
 595         in_dev = __in_dev_get_rcu(dev);
 596
 597         if (in_dev)
 598                 addr = inet_confirm_addr(dev_net(dev), in_dev, dst, local,
 599                                          RT_SCOPE_HOST);
 600         rcu_read_unlock();
 601         return addr;
 602 }
 603
 604 struct bond_net {
 605         struct net              *net;   /* Associated network namespace */
 606         struct list_head        dev_list;
 607 #ifdef CONFIG_PROC_FS
 608         struct proc_dir_entry   *proc_dir;
 609 #endif
 610         struct class_attribute  class_attr_bonding_masters;
 611 };
 612
 613 int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond, struct slave *slave);
 614 void bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
 615 int bond_create(struct net *net, const char *name);
 616 int bond_create_sysfs(struct bond_net *net);
 617 void bond_destroy_sysfs(struct bond_net *net);
 618 void bond_prepare_sysfs_group(struct bonding *bond);
 619 int bond_sysfs_slave_add(struct slave *slave);
 620 void bond_sysfs_slave_del(struct slave *slave);
 621 int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev,
 622                  struct netlink_ext_ack *extack);
 623 int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
 624 u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb);
 625 int bond_set_carrier(struct bonding *bond);
 626 void bond_select_active_slave(struct bonding *bond);
 627 void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
 628 void bond_create_debugfs(void);
 629 void bond_destroy_debugfs(void);
 630 void bond_debug_register(struct bonding *bond);
 631 void bond_debug_unregister(struct bonding *bond);
 632 void bond_debug_reregister(struct bonding *bond);
 633 const char *bond_mode_name(int mode);
 634 void bond_setup(struct net_device *bond_dev);
 635 unsigned int bond_get_num_tx_queues(void);
 636 int bond_netlink_init(void);
 637 void bond_netlink_fini(void);
 638 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond);
 639 const char *bond_slave_link_status(s8 link);
 640 struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev,
 641                                               struct net_device *end_dev,
 642                                               int level);
 643 int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave);
 644 void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay);
 645 void bond_work_init_all(struct bonding *bond);
 646
 647 #ifdef CONFIG_PROC_FS
 648 void bond_create_proc_entry(struct bonding *bond);
 649 void bond_remove_proc_entry(struct bonding *bond);
 650 void bond_create_proc_dir(struct bond_net *bn);
 651 void bond_destroy_proc_dir(struct bond_net *bn);
 652 #else
 653 static inline void bond_create_proc_entry(struct bonding *bond)
 654 {
 655 }
 656
 657 static inline void bond_remove_proc_entry(struct bonding *bond)
 658 {
 659 }
 660
 661 static inline void bond_create_proc_dir(struct bond_net *bn)
 662 {
 663 }
 664
 665 static inline void bond_destroy_proc_dir(struct bond_net *bn)
 666 {
 667 }
 668 #endif
 669
 670 static inline struct slave *bond_slave_has_mac(struct bonding *bond,
 671                                                const u8 *mac)
 672 {
 673         struct list_head *iter;
 674         struct slave *tmp;
 675
 676         bond_for_each_slave(bond, tmp, iter)
 677                 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
 678                         return tmp;
 679
 680         return NULL;
 681 }
 682
 683 /* Caller must hold rcu_read_lock() for read */
 684 static inline struct slave *bond_slave_has_mac_rcu(struct bonding *bond,
 685                                                const u8 *mac)
 686 {
 687         struct list_head *iter;
 688         struct slave *tmp;
 689
 690         bond_for_each_slave_rcu(bond, tmp, iter)
 691                 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
 692                         return tmp;
 693
 694         return NULL;
 695 }
 696
 697 /* Caller must hold rcu_read_lock() for read */
 698 static inline bool bond_slave_has_mac_rx(struct bonding *bond, const u8 *mac)
 699 {
 700         struct list_head *iter;
 701         struct slave *tmp;
 702         struct netdev_hw_addr *ha;
 703
 704         bond_for_each_slave_rcu(bond, tmp, iter)
 705                 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
 706                         return true;
 707
 708         if (netdev_uc_empty(bond->dev))
 709                 return false;
 710
 711         netdev_for_each_uc_addr(ha, bond->dev)
 712                 if (ether_addr_equal_64bits(mac, ha->addr))
 713                         return true;
 714
 715         return false;
 716 }
 717
 718 /* Check if the ip is present in arp ip list, or first free slot if ip == 0
 719  * Returns -1 if not found, index if found
 720  */
 721 static inline int bond_get_targets_ip(__be32 *targets, __be32 ip)
 722 {
 723         int i;
 724
 725         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
 726                 if (targets[i] == ip)
 727                         return i;
 728                 else if (targets[i] == 0)
 729                         break;
 730
 731         return -1;
 732 }
 733
 734 /* exported from bond_main.c */
 735 extern unsigned int bond_net_id;
 736 extern const struct bond_parm_tbl bond_lacp_tbl[];
 737 extern const struct bond_parm_tbl xmit_hashtype_tbl[];
 738 extern const struct bond_parm_tbl arp_validate_tbl[];
 739 extern const struct bond_parm_tbl arp_all_targets_tbl[];
 740 extern const struct bond_parm_tbl fail_over_mac_tbl[];
 741 extern const struct bond_parm_tbl pri_reselect_tbl[];
 742 extern struct bond_parm_tbl ad_select_tbl[];
 743
 744 /* exported from bond_netlink.c */
 745 extern struct rtnl_link_ops bond_link_ops;
 746
 747 static inline void bond_tx_drop(struct net_device *dev, struct sk_buff *skb)
 748 {
 749         atomic_long_inc(&dev->tx_dropped);
 750         dev_kfree_skb_any(skb);
 751 }
 752
 753 #endif /* _NET_BONDING_H */