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_XFRM_OFFLOAD
  90 #define BOND_XFRM_FEATURES (NETIF_F_HW_ESP | NETIF_F_HW_ESP_TX_CSUM | \
  91                             NETIF_F_GSO_ESP)
  92 #endif /* CONFIG_XFRM_OFFLOAD */
  93
  94 #ifdef CONFIG_NET_POLL_CONTROLLER
  95 extern atomic_t netpoll_block_tx;
  96
  97 static inline void block_netpoll_tx(void)
  98 {
  99         atomic_inc(&netpoll_block_tx);
 100 }
 101
 102 static inline void unblock_netpoll_tx(void)
 103 {
 104         atomic_dec(&netpoll_block_tx);
 105 }
 106
 107 static inline int is_netpoll_tx_blocked(struct net_device *dev)
 108 {
 109         if (unlikely(netpoll_tx_running(dev)))
 110                 return atomic_read(&netpoll_block_tx);
 111         return 0;
 112 }
 113 #else
 114 #define block_netpoll_tx()
 115 #define unblock_netpoll_tx()
 116 #define is_netpoll_tx_blocked(dev) (0)
 117 #endif
 118
 119 struct bond_params {
 120         int mode;
 121         int xmit_policy;
 122         int miimon;
 123         u8 num_peer_notif;
 124         int arp_interval;
 125         int arp_validate;
 126         int arp_all_targets;
 127         int use_carrier;
 128         int fail_over_mac;
 129         int updelay;
 130         int downdelay;
 131         int peer_notif_delay;
 132         int lacp_fast;
 133         unsigned int min_links;
 134         int ad_select;
 135         char primary[IFNAMSIZ];
 136         int primary_reselect;
 137         __be32 arp_targets[BOND_MAX_ARP_TARGETS];
 138         int tx_queues;
 139         int all_slaves_active;
 140         int resend_igmp;
 141         int lp_interval;
 142         int packets_per_slave;
 143         int tlb_dynamic_lb;
 144         struct reciprocal_value reciprocal_packets_per_slave;
 145         u16 ad_actor_sys_prio;
 146         u16 ad_user_port_key;
 147
 148         /* 2 bytes of padding : see ether_addr_equal_64bits() */
 149         u8 ad_actor_system[ETH_ALEN + 2];
 150 };
 151
 152 struct bond_parm_tbl {
 153         char *modename;
 154         int mode;
 155 };
 156
 157 struct slave {
 158         struct net_device *dev; /* first - useful for panic debug */
 159         struct bonding *bond; /* our master */
 160         int    delay;
 161         /* all three in jiffies */
 162         unsigned long last_link_up;
 163         unsigned long last_rx;
 164         unsigned long target_last_arp_rx[BOND_MAX_ARP_TARGETS];
 165         s8     link;            /* one of BOND_LINK_XXXX */
 166         s8     link_new_state;  /* one of BOND_LINK_XXXX */
 167         u8     backup:1,   /* indicates backup slave. Value corresponds with
 168                               BOND_STATE_ACTIVE and BOND_STATE_BACKUP */
 169                inactive:1, /* indicates inactive slave */
 170                should_notify:1, /* indicates whether the state changed */
 171                should_notify_link:1; /* indicates whether the link changed */
 172         u8     duplex;
 173         u32    original_mtu;
 174         u32    link_failure_count;
 175         u32    speed;
 176         u16    queue_id;
 177         u8     perm_hwaddr[MAX_ADDR_LEN];
 178         struct ad_slave_info *ad_info;
 179         struct tlb_slave_info tlb_info;
 180 #ifdef CONFIG_NET_POLL_CONTROLLER
 181         struct netpoll *np;
 182 #endif
 183         struct delayed_work notify_work;
 184         struct kobject kobj;
 185         struct rtnl_link_stats64 slave_stats;
 186 };
 187
 188 struct bond_up_slave {
 189         unsigned int    count;
 190         struct rcu_head rcu;
 191         struct slave    *arr[];
 192 };
 193
 194 /*
 195  * Link pseudo-state only used internally by monitors
 196  */
 197 #define BOND_LINK_NOCHANGE -1
 198
 199 /*
 200  * Here are the locking policies for the two bonding locks:
 201  * Get rcu_read_lock when reading or RTNL when writing slave list.
 202  */
 203 struct bonding {
 204         struct   net_device *dev; /* first - useful for panic debug */
 205         struct   slave __rcu *curr_active_slave;
 206         struct   slave __rcu *current_arp_slave;
 207         struct   slave __rcu *primary_slave;
 208         struct   bond_up_slave __rcu *usable_slaves;
 209         struct   bond_up_slave __rcu *all_slaves;
 210         bool     force_primary;
 211         s32      slave_cnt; /* never change this value outside the attach/detach wrappers */
 212         int     (*recv_probe)(const struct sk_buff *, struct bonding *,
 213                               struct slave *);
 214         /* mode_lock is used for mode-specific locking needs, currently used by:
 215          * 3ad mode (4) - protect against running bond_3ad_unbind_slave() and
 216          *                bond_3ad_state_machine_handler() concurrently and also
 217          *                the access to the state machine shared variables.
 218          * TLB mode (5) - to sync the use and modifications of its hash table
 219          * ALB mode (6) - to sync the use and modifications of its hash table
 220          */
 221         spinlock_t mode_lock;
 222         spinlock_t stats_lock;
 223         u8       send_peer_notif;
 224         u8       igmp_retrans;
 225 #ifdef CONFIG_PROC_FS
 226         struct   proc_dir_entry *proc_entry;
 227         char     proc_file_name[IFNAMSIZ];
 228 #endif /* CONFIG_PROC_FS */
 229         struct   list_head bond_list;
 230         u32      rr_tx_counter;
 231         struct   ad_bond_info ad_info;
 232         struct   alb_bond_info alb_info;
 233         struct   bond_params params;
 234         struct   workqueue_struct *wq;
 235         struct   delayed_work mii_work;
 236         struct   delayed_work arp_work;
 237         struct   delayed_work alb_work;
 238         struct   delayed_work ad_work;
 239         struct   delayed_work mcast_work;
 240         struct   delayed_work slave_arr_work;
 241 #ifdef CONFIG_DEBUG_FS
 242         /* debugging support via debugfs */
 243         struct   dentry *debug_dir;
 244 #endif /* CONFIG_DEBUG_FS */
 245         struct rtnl_link_stats64 bond_stats;
 246 #ifdef CONFIG_XFRM_OFFLOAD
 247         struct xfrm_state *xs;
 248 #endif /* CONFIG_XFRM_OFFLOAD */
 249 };
 250
 251 #define bond_slave_get_rcu(dev) \
 252         ((struct slave *) rcu_dereference(dev->rx_handler_data))
 253
 254 #define bond_slave_get_rtnl(dev) \
 255         ((struct slave *) rtnl_dereference(dev->rx_handler_data))
 256
 257 void bond_queue_slave_event(struct slave *slave);
 258 void bond_lower_state_changed(struct slave *slave);
 259
 260 struct bond_vlan_tag {
 261         __be16          vlan_proto;
 262         unsigned short  vlan_id;
 263 };
 264
 265 /**
 266  * Returns NULL if the net_device does not belong to any of the bond's slaves
 267  *
 268  * Caller must hold bond lock for read
 269  */
 270 static inline struct slave *bond_get_slave_by_dev(struct bonding *bond,
 271                                                   struct net_device *slave_dev)
 272 {
 273         return netdev_lower_dev_get_private(bond->dev, slave_dev);
 274 }
 275
 276 static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
 277 {
 278         return slave->bond;
 279 }
 280
 281 static inline bool bond_should_override_tx_queue(struct bonding *bond)
 282 {
 283         return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP ||
 284                BOND_MODE(bond) == BOND_MODE_ROUNDROBIN;
 285 }
 286
 287 static inline bool bond_is_lb(const struct bonding *bond)
 288 {
 289         return BOND_MODE(bond) == BOND_MODE_TLB ||
 290                BOND_MODE(bond) == BOND_MODE_ALB;
 291 }
 292
 293 static inline bool bond_needs_speed_duplex(const struct bonding *bond)
 294 {
 295         return BOND_MODE(bond) == BOND_MODE_8023AD || bond_is_lb(bond);
 296 }
 297
 298 static inline bool bond_is_nondyn_tlb(const struct bonding *bond)
 299 {
 300         return (bond_is_lb(bond) && bond->params.tlb_dynamic_lb == 0);
 301 }
 302
 303 static inline bool bond_mode_can_use_xmit_hash(const struct bonding *bond)
 304 {
 305         return (BOND_MODE(bond) == BOND_MODE_8023AD ||
 306                 BOND_MODE(bond) == BOND_MODE_XOR ||
 307                 BOND_MODE(bond) == BOND_MODE_TLB ||
 308                 BOND_MODE(bond) == BOND_MODE_ALB);
 309 }
 310
 311 static inline bool bond_mode_uses_xmit_hash(const struct bonding *bond)
 312 {
 313         return (BOND_MODE(bond) == BOND_MODE_8023AD ||
 314                 BOND_MODE(bond) == BOND_MODE_XOR ||
 315                 bond_is_nondyn_tlb(bond));
 316 }
 317
 318 static inline bool bond_mode_uses_arp(int mode)
 319 {
 320         return mode != BOND_MODE_8023AD && mode != BOND_MODE_TLB &&
 321                mode != BOND_MODE_ALB;
 322 }
 323
 324 static inline bool bond_mode_uses_primary(int mode)
 325 {
 326         return mode == BOND_MODE_ACTIVEBACKUP || mode == BOND_MODE_TLB ||
 327                mode == BOND_MODE_ALB;
 328 }
 329
 330 static inline bool bond_uses_primary(struct bonding *bond)
 331 {
 332         return bond_mode_uses_primary(BOND_MODE(bond));
 333 }
 334
 335 static inline struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
 336 {
 337         struct slave *slave = rcu_dereference(bond->curr_active_slave);
 338
 339         return bond_uses_primary(bond) && slave ? slave->dev : NULL;
 340 }
 341
 342 static inline bool bond_slave_is_up(struct slave *slave)
 343 {
 344         return netif_running(slave->dev) && netif_carrier_ok(slave->dev);
 345 }
 346
 347 static inline void bond_set_active_slave(struct slave *slave)
 348 {
 349         if (slave->backup) {
 350                 slave->backup = 0;
 351                 bond_queue_slave_event(slave);
 352                 bond_lower_state_changed(slave);
 353         }
 354 }
 355
 356 static inline void bond_set_backup_slave(struct slave *slave)
 357 {
 358         if (!slave->backup) {
 359                 slave->backup = 1;
 360                 bond_queue_slave_event(slave);
 361                 bond_lower_state_changed(slave);
 362         }
 363 }
 364
 365 static inline void bond_set_slave_state(struct slave *slave,
 366                                         int slave_state, bool notify)
 367 {
 368         if (slave->backup == slave_state)
 369                 return;
 370
 371         slave->backup = slave_state;
 372         if (notify) {
 373                 bond_lower_state_changed(slave);
 374                 bond_queue_slave_event(slave);
 375                 slave->should_notify = 0;
 376         } else {
 377                 if (slave->should_notify)
 378                         slave->should_notify = 0;
 379                 else
 380                         slave->should_notify = 1;
 381         }
 382 }
 383
 384 static inline void bond_slave_state_change(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->link == BOND_LINK_UP)
 391                         bond_set_active_slave(tmp);
 392                 else if (tmp->link == BOND_LINK_DOWN)
 393                         bond_set_backup_slave(tmp);
 394         }
 395 }
 396
 397 static inline void bond_slave_state_notify(struct bonding *bond)
 398 {
 399         struct list_head *iter;
 400         struct slave *tmp;
 401
 402         bond_for_each_slave(bond, tmp, iter) {
 403                 if (tmp->should_notify) {
 404                         bond_lower_state_changed(tmp);
 405                         tmp->should_notify = 0;
 406                 }
 407         }
 408 }
 409
 410 static inline int bond_slave_state(struct slave *slave)
 411 {
 412         return slave->backup;
 413 }
 414
 415 static inline bool bond_is_active_slave(struct slave *slave)
 416 {
 417         return !bond_slave_state(slave);
 418 }
 419
 420 static inline bool bond_slave_can_tx(struct slave *slave)
 421 {
 422         return bond_slave_is_up(slave) && slave->link == BOND_LINK_UP &&
 423                bond_is_active_slave(slave);
 424 }
 425
 426 static inline bool bond_is_active_slave_dev(const struct net_device *slave_dev)
 427 {
 428         struct slave *slave;
 429         bool active;
 430
 431         rcu_read_lock();
 432         slave = bond_slave_get_rcu(slave_dev);
 433         active = bond_is_active_slave(slave);
 434         rcu_read_unlock();
 435
 436         return active;
 437 }
 438
 439 static inline void bond_hw_addr_copy(u8 *dst, const u8 *src, unsigned int len)
 440 {
 441         if (len == ETH_ALEN) {
 442                 ether_addr_copy(dst, src);
 443                 return;
 444         }
 445
 446         memcpy(dst, src, len);
 447 }
 448
 449 #define BOND_PRI_RESELECT_ALWAYS        0
 450 #define BOND_PRI_RESELECT_BETTER        1
 451 #define BOND_PRI_RESELECT_FAILURE       2
 452
 453 #define BOND_FOM_NONE                   0
 454 #define BOND_FOM_ACTIVE                 1
 455 #define BOND_FOM_FOLLOW                 2
 456
 457 #define BOND_ARP_TARGETS_ANY            0
 458 #define BOND_ARP_TARGETS_ALL            1
 459
 460 #define BOND_ARP_VALIDATE_NONE          0
 461 #define BOND_ARP_VALIDATE_ACTIVE        (1 << BOND_STATE_ACTIVE)
 462 #define BOND_ARP_VALIDATE_BACKUP        (1 << BOND_STATE_BACKUP)
 463 #define BOND_ARP_VALIDATE_ALL           (BOND_ARP_VALIDATE_ACTIVE | \
 464                                          BOND_ARP_VALIDATE_BACKUP)
 465 #define BOND_ARP_FILTER                 (BOND_ARP_VALIDATE_ALL + 1)
 466 #define BOND_ARP_FILTER_ACTIVE          (BOND_ARP_VALIDATE_ACTIVE | \
 467                                          BOND_ARP_FILTER)
 468 #define BOND_ARP_FILTER_BACKUP          (BOND_ARP_VALIDATE_BACKUP | \
 469                                          BOND_ARP_FILTER)
 470
 471 #define BOND_SLAVE_NOTIFY_NOW           true
 472 #define BOND_SLAVE_NOTIFY_LATER         false
 473
 474 static inline int slave_do_arp_validate(struct bonding *bond,
 475                                         struct slave *slave)
 476 {
 477         return bond->params.arp_validate & (1 << bond_slave_state(slave));
 478 }
 479
 480 static inline int slave_do_arp_validate_only(struct bonding *bond)
 481 {
 482         return bond->params.arp_validate & BOND_ARP_FILTER;
 483 }
 484
 485 static inline int bond_is_ip_target_ok(__be32 addr)
 486 {
 487         return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr);
 488 }
 489
 490 /* Get the oldest arp which we've received on this slave for bond's
 491  * arp_targets.
 492  */
 493 static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond,
 494                                                        struct slave *slave)
 495 {
 496         int i = 1;
 497         unsigned long ret = slave->target_last_arp_rx[0];
 498
 499         for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++)
 500                 if (time_before(slave->target_last_arp_rx[i], ret))
 501                         ret = slave->target_last_arp_rx[i];
 502
 503         return ret;
 504 }
 505
 506 static inline unsigned long slave_last_rx(struct bonding *bond,
 507                                         struct slave *slave)
 508 {
 509         if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL)
 510                 return slave_oldest_target_arp_rx(bond, slave);
 511
 512         return slave->last_rx;
 513 }
 514
 515 #ifdef CONFIG_NET_POLL_CONTROLLER
 516 static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave,
 517                                          struct sk_buff *skb)
 518 {
 519         return netpoll_send_skb(slave->np, skb);
 520 }
 521 #else
 522 static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave,
 523                                          struct sk_buff *skb)
 524 {
 525         BUG();
 526         return NETDEV_TX_OK;
 527 }
 528 #endif
 529
 530 static inline void bond_set_slave_inactive_flags(struct slave *slave,
 531                                                  bool notify)
 532 {
 533         if (!bond_is_lb(slave->bond))
 534                 bond_set_slave_state(slave, BOND_STATE_BACKUP, notify);
 535         if (!slave->bond->params.all_slaves_active)
 536                 slave->inactive = 1;
 537 }
 538
 539 static inline void bond_set_slave_active_flags(struct slave *slave,
 540                                                bool notify)
 541 {
 542         bond_set_slave_state(slave, BOND_STATE_ACTIVE, notify);
 543         slave->inactive = 0;
 544 }
 545
 546 static inline bool bond_is_slave_inactive(struct slave *slave)
 547 {
 548         return slave->inactive;
 549 }
 550
 551 static inline void bond_propose_link_state(struct slave *slave, int state)
 552 {
 553         slave->link_new_state = state;
 554 }
 555
 556 static inline void bond_commit_link_state(struct slave *slave, bool notify)
 557 {
 558         if (slave->link_new_state == BOND_LINK_NOCHANGE)
 559                 return;
 560
 561         slave->link = slave->link_new_state;
 562         if (notify) {
 563                 bond_queue_slave_event(slave);
 564                 bond_lower_state_changed(slave);
 565                 slave->should_notify_link = 0;
 566         } else {
 567                 if (slave->should_notify_link)
 568                         slave->should_notify_link = 0;
 569                 else
 570                         slave->should_notify_link = 1;
 571         }
 572 }
 573
 574 static inline void bond_set_slave_link_state(struct slave *slave, int state,
 575                                              bool notify)
 576 {
 577         bond_propose_link_state(slave, state);
 578         bond_commit_link_state(slave, notify);
 579 }
 580
 581 static inline void bond_slave_link_notify(struct bonding *bond)
 582 {
 583         struct list_head *iter;
 584         struct slave *tmp;
 585
 586         bond_for_each_slave(bond, tmp, iter) {
 587                 if (tmp->should_notify_link) {
 588                         bond_queue_slave_event(tmp);
 589                         bond_lower_state_changed(tmp);
 590                         tmp->should_notify_link = 0;
 591                 }
 592         }
 593 }
 594
 595 static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
 596 {
 597         struct in_device *in_dev;
 598         __be32 addr = 0;
 599
 600         rcu_read_lock();
 601         in_dev = __in_dev_get_rcu(dev);
 602
 603         if (in_dev)
 604                 addr = inet_confirm_addr(dev_net(dev), in_dev, dst, local,
 605                                          RT_SCOPE_HOST);
 606         rcu_read_unlock();
 607         return addr;
 608 }
 609
 610 struct bond_net {
 611         struct net              *net;   /* Associated network namespace */
 612         struct list_head        dev_list;
 613 #ifdef CONFIG_PROC_FS
 614         struct proc_dir_entry   *proc_dir;
 615 #endif
 616         struct class_attribute  class_attr_bonding_masters;
 617 };
 618
 619 int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond, struct slave *slave);
 620 netdev_tx_t bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
 621 int bond_create(struct net *net, const char *name);
 622 int bond_create_sysfs(struct bond_net *net);
 623 void bond_destroy_sysfs(struct bond_net *net);
 624 void bond_prepare_sysfs_group(struct bonding *bond);
 625 int bond_sysfs_slave_add(struct slave *slave);
 626 void bond_sysfs_slave_del(struct slave *slave);
 627 int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev,
 628                  struct netlink_ext_ack *extack);
 629 int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
 630 u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb);
 631 int bond_set_carrier(struct bonding *bond);
 632 void bond_select_active_slave(struct bonding *bond);
 633 void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
 634 void bond_create_debugfs(void);
 635 void bond_destroy_debugfs(void);
 636 void bond_debug_register(struct bonding *bond);
 637 void bond_debug_unregister(struct bonding *bond);
 638 void bond_debug_reregister(struct bonding *bond);
 639 const char *bond_mode_name(int mode);
 640 void bond_setup(struct net_device *bond_dev);
 641 unsigned int bond_get_num_tx_queues(void);
 642 int bond_netlink_init(void);
 643 void bond_netlink_fini(void);
 644 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond);
 645 const char *bond_slave_link_status(s8 link);
 646 struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev,
 647                                               struct net_device *end_dev,
 648                                               int level);
 649 int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave);
 650 void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay);
 651 void bond_work_init_all(struct bonding *bond);
 652
 653 #ifdef CONFIG_PROC_FS
 654 void bond_create_proc_entry(struct bonding *bond);
 655 void bond_remove_proc_entry(struct bonding *bond);
 656 void bond_create_proc_dir(struct bond_net *bn);
 657 void bond_destroy_proc_dir(struct bond_net *bn);
 658 #else
 659 static inline void bond_create_proc_entry(struct bonding *bond)
 660 {
 661 }
 662
 663 static inline void bond_remove_proc_entry(struct bonding *bond)
 664 {
 665 }
 666
 667 static inline void bond_create_proc_dir(struct bond_net *bn)
 668 {
 669 }
 670
 671 static inline void bond_destroy_proc_dir(struct bond_net *bn)
 672 {
 673 }
 674 #endif
 675
 676 static inline struct slave *bond_slave_has_mac(struct bonding *bond,
 677                                                const u8 *mac)
 678 {
 679         struct list_head *iter;
 680         struct slave *tmp;
 681
 682         bond_for_each_slave(bond, tmp, iter)
 683                 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
 684                         return tmp;
 685
 686         return NULL;
 687 }
 688
 689 /* Caller must hold rcu_read_lock() for read */
 690 static inline struct slave *bond_slave_has_mac_rcu(struct bonding *bond,
 691                                                const u8 *mac)
 692 {
 693         struct list_head *iter;
 694         struct slave *tmp;
 695
 696         bond_for_each_slave_rcu(bond, tmp, iter)
 697                 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
 698                         return tmp;
 699
 700         return NULL;
 701 }
 702
 703 /* Caller must hold rcu_read_lock() for read */
 704 static inline bool bond_slave_has_mac_rx(struct bonding *bond, const u8 *mac)
 705 {
 706         struct list_head *iter;
 707         struct slave *tmp;
 708         struct netdev_hw_addr *ha;
 709
 710         bond_for_each_slave_rcu(bond, tmp, iter)
 711                 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
 712                         return true;
 713
 714         if (netdev_uc_empty(bond->dev))
 715                 return false;
 716
 717         netdev_for_each_uc_addr(ha, bond->dev)
 718                 if (ether_addr_equal_64bits(mac, ha->addr))
 719                         return true;
 720
 721         return false;
 722 }
 723
 724 /* Check if the ip is present in arp ip list, or first free slot if ip == 0
 725  * Returns -1 if not found, index if found
 726  */
 727 static inline int bond_get_targets_ip(__be32 *targets, __be32 ip)
 728 {
 729         int i;
 730
 731         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
 732                 if (targets[i] == ip)
 733                         return i;
 734                 else if (targets[i] == 0)
 735                         break;
 736
 737         return -1;
 738 }
 739
 740 /* exported from bond_main.c */
 741 extern unsigned int bond_net_id;
 742 extern const struct bond_parm_tbl bond_lacp_tbl[];
 743 extern const struct bond_parm_tbl xmit_hashtype_tbl[];
 744 extern const struct bond_parm_tbl arp_validate_tbl[];
 745 extern const struct bond_parm_tbl arp_all_targets_tbl[];
 746 extern const struct bond_parm_tbl fail_over_mac_tbl[];
 747 extern const struct bond_parm_tbl pri_reselect_tbl[];
 748 extern struct bond_parm_tbl ad_select_tbl[];
 749
 750 /* exported from bond_netlink.c */
 751 extern struct rtnl_link_ops bond_link_ops;
 752
 753 static inline netdev_tx_t bond_tx_drop(struct net_device *dev, struct sk_buff *skb)
 754 {
 755         atomic_long_inc(&dev->tx_dropped);
 756         dev_kfree_skb_any(skb);
 757         return NET_XMIT_DROP;
 758 }
 759
 760 #endif /* _NET_BONDING_H */