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 #define BOND_XFRM_FEATURES (NETIF_F_HW_ESP | NETIF_F_HW_ESP_TX_CSUM | \
  90                             NETIF_F_GSO_ESP)
  91
  92 #ifdef CONFIG_NET_POLL_CONTROLLER
  93 extern atomic_t netpoll_block_tx;
  94
  95 static inline void block_netpoll_tx(void)
  96 {
  97         atomic_inc(&netpoll_block_tx);
  98 }
  99
 100 static inline void unblock_netpoll_tx(void)
 101 {
 102         atomic_dec(&netpoll_block_tx);
 103 }
 104
 105 static inline int is_netpoll_tx_blocked(struct net_device *dev)
 106 {
 107         if (unlikely(netpoll_tx_running(dev)))
 108                 return atomic_read(&netpoll_block_tx);
 109         return 0;
 110 }
 111 #else
 112 #define block_netpoll_tx()
 113 #define unblock_netpoll_tx()
 114 #define is_netpoll_tx_blocked(dev) (0)
 115 #endif
 116
 117 struct bond_params {
 118         int mode;
 119         int xmit_policy;
 120         int miimon;
 121         u8 num_peer_notif;
 122         int arp_interval;
 123         int arp_validate;
 124         int arp_all_targets;
 125         int use_carrier;
 126         int fail_over_mac;
 127         int updelay;
 128         int downdelay;
 129         int peer_notif_delay;
 130         int lacp_fast;
 131         unsigned int min_links;
 132         int ad_select;
 133         char primary[IFNAMSIZ];
 134         int primary_reselect;
 135         __be32 arp_targets[BOND_MAX_ARP_TARGETS];
 136         int tx_queues;
 137         int all_slaves_active;
 138         int resend_igmp;
 139         int lp_interval;
 140         int packets_per_slave;
 141         int tlb_dynamic_lb;
 142         struct reciprocal_value reciprocal_packets_per_slave;
 143         u16 ad_actor_sys_prio;
 144         u16 ad_user_port_key;
 145
 146         /* 2 bytes of padding : see ether_addr_equal_64bits() */
 147         u8 ad_actor_system[ETH_ALEN + 2];
 148 };
 149
 150 struct bond_parm_tbl {
 151         char *modename;
 152         int mode;
 153 };
 154
 155 struct slave {
 156         struct net_device *dev; /* first - useful for panic debug */
 157         struct bonding *bond; /* our master */
 158         int    delay;
 159         /* all three in jiffies */
 160         unsigned long last_link_up;
 161         unsigned long last_rx;
 162         unsigned long target_last_arp_rx[BOND_MAX_ARP_TARGETS];
 163         s8     link;            /* one of BOND_LINK_XXXX */
 164         s8     link_new_state;  /* one of BOND_LINK_XXXX */
 165         u8     backup:1,   /* indicates backup slave. Value corresponds with
 166                               BOND_STATE_ACTIVE and BOND_STATE_BACKUP */
 167                inactive:1, /* indicates inactive slave */
 168                should_notify:1, /* indicates whether the state changed */
 169                should_notify_link:1; /* indicates whether the link changed */
 170         u8     duplex;
 171         u32    original_mtu;
 172         u32    link_failure_count;
 173         u32    speed;
 174         u16    queue_id;
 175         u8     perm_hwaddr[MAX_ADDR_LEN];
 176         struct ad_slave_info *ad_info;
 177         struct tlb_slave_info tlb_info;
 178 #ifdef CONFIG_NET_POLL_CONTROLLER
 179         struct netpoll *np;
 180 #endif
 181         struct delayed_work notify_work;
 182         struct kobject kobj;
 183         struct rtnl_link_stats64 slave_stats;
 184 };
 185
 186 static inline struct slave *to_slave(struct kobject *kobj)
 187 {
 188         return container_of(kobj, struct slave, kobj);
 189 }
 190
 191 struct bond_up_slave {
 192         unsigned int    count;
 193         struct rcu_head rcu;
 194         struct slave    *arr[];
 195 };
 196
 197 /*
 198  * Link pseudo-state only used internally by monitors
 199  */
 200 #define BOND_LINK_NOCHANGE -1
 201
 202 /*
 203  * Here are the locking policies for the two bonding locks:
 204  * Get rcu_read_lock when reading or RTNL when writing slave list.
 205  */
 206 struct bonding {
 207         struct   net_device *dev; /* first - useful for panic debug */
 208         struct   slave __rcu *curr_active_slave;
 209         struct   slave __rcu *current_arp_slave;
 210         struct   slave __rcu *primary_slave;
 211         struct   bond_up_slave __rcu *usable_slaves;
 212         struct   bond_up_slave __rcu *all_slaves;
 213         bool     force_primary;
 214         s32      slave_cnt; /* never change this value outside the attach/detach wrappers */
 215         int     (*recv_probe)(const struct sk_buff *, struct bonding *,
 216                               struct slave *);
 217         /* mode_lock is used for mode-specific locking needs, currently used by:
 218          * 3ad mode (4) - protect against running bond_3ad_unbind_slave() and
 219          *                bond_3ad_state_machine_handler() concurrently and also
 220          *                the access to the state machine shared variables.
 221          * TLB mode (5) - to sync the use and modifications of its hash table
 222          * ALB mode (6) - to sync the use and modifications of its hash table
 223          */
 224         spinlock_t mode_lock;
 225         spinlock_t stats_lock;
 226         u8       send_peer_notif;
 227         u8       igmp_retrans;
 228 #ifdef CONFIG_PROC_FS
 229         struct   proc_dir_entry *proc_entry;
 230         char     proc_file_name[IFNAMSIZ];
 231 #endif /* CONFIG_PROC_FS */
 232         struct   list_head bond_list;
 233         u32      rr_tx_counter;
 234         struct   ad_bond_info ad_info;
 235         struct   alb_bond_info alb_info;
 236         struct   bond_params params;
 237         struct   workqueue_struct *wq;
 238         struct   delayed_work mii_work;
 239         struct   delayed_work arp_work;
 240         struct   delayed_work alb_work;
 241         struct   delayed_work ad_work;
 242         struct   delayed_work mcast_work;
 243         struct   delayed_work slave_arr_work;
 244 #ifdef CONFIG_DEBUG_FS
 245         /* debugging support via debugfs */
 246         struct   dentry *debug_dir;
 247 #endif /* CONFIG_DEBUG_FS */
 248         struct rtnl_link_stats64 bond_stats;
 249 #ifdef CONFIG_XFRM_OFFLOAD
 250         struct xfrm_state *xs;
 251 #endif /* CONFIG_XFRM_OFFLOAD */
 252 };
 253
 254 #define bond_slave_get_rcu(dev) \
 255         ((struct slave *) rcu_dereference(dev->rx_handler_data))
 256
 257 #define bond_slave_get_rtnl(dev) \
 258         ((struct slave *) rtnl_dereference(dev->rx_handler_data))
 259
 260 void bond_queue_slave_event(struct slave *slave);
 261 void bond_lower_state_changed(struct slave *slave);
 262
 263 struct bond_vlan_tag {
 264         __be16          vlan_proto;
 265         unsigned short  vlan_id;
 266 };
 267
 268 /**
 269  * Returns NULL if the net_device does not belong to any of the bond's slaves
 270  *
 271  * Caller must hold bond lock for read
 272  */
 273 static inline struct slave *bond_get_slave_by_dev(struct bonding *bond,
 274                                                   struct net_device *slave_dev)
 275 {
 276         return netdev_lower_dev_get_private(bond->dev, slave_dev);
 277 }
 278
 279 static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
 280 {
 281         return slave->bond;
 282 }
 283
 284 static inline bool bond_should_override_tx_queue(struct bonding *bond)
 285 {
 286         return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP ||
 287                BOND_MODE(bond) == BOND_MODE_ROUNDROBIN;
 288 }
 289
 290 static inline bool bond_is_lb(const struct bonding *bond)
 291 {
 292         return BOND_MODE(bond) == BOND_MODE_TLB ||
 293                BOND_MODE(bond) == BOND_MODE_ALB;
 294 }
 295
 296 static inline bool bond_needs_speed_duplex(const struct bonding *bond)
 297 {
 298         return BOND_MODE(bond) == BOND_MODE_8023AD || bond_is_lb(bond);
 299 }
 300
 301 static inline bool bond_is_nondyn_tlb(const struct bonding *bond)
 302 {
 303         return (bond_is_lb(bond) && bond->params.tlb_dynamic_lb == 0);
 304 }
 305
 306 static inline bool bond_mode_can_use_xmit_hash(const struct bonding *bond)
 307 {
 308         return (BOND_MODE(bond) == BOND_MODE_8023AD ||
 309                 BOND_MODE(bond) == BOND_MODE_XOR ||
 310                 BOND_MODE(bond) == BOND_MODE_TLB ||
 311                 BOND_MODE(bond) == BOND_MODE_ALB);
 312 }
 313
 314 static inline bool bond_mode_uses_xmit_hash(const struct bonding *bond)
 315 {
 316         return (BOND_MODE(bond) == BOND_MODE_8023AD ||
 317                 BOND_MODE(bond) == BOND_MODE_XOR ||
 318                 bond_is_nondyn_tlb(bond));
 319 }
 320
 321 static inline bool bond_mode_uses_arp(int mode)
 322 {
 323         return mode != BOND_MODE_8023AD && mode != BOND_MODE_TLB &&
 324                mode != BOND_MODE_ALB;
 325 }
 326
 327 static inline bool bond_mode_uses_primary(int mode)
 328 {
 329         return mode == BOND_MODE_ACTIVEBACKUP || mode == BOND_MODE_TLB ||
 330                mode == BOND_MODE_ALB;
 331 }
 332
 333 static inline bool bond_uses_primary(struct bonding *bond)
 334 {
 335         return bond_mode_uses_primary(BOND_MODE(bond));
 336 }
 337
 338 static inline struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
 339 {
 340         struct slave *slave = rcu_dereference(bond->curr_active_slave);
 341
 342         return bond_uses_primary(bond) && slave ? slave->dev : NULL;
 343 }
 344
 345 static inline bool bond_slave_is_up(struct slave *slave)
 346 {
 347         return netif_running(slave->dev) && netif_carrier_ok(slave->dev);
 348 }
 349
 350 static inline void bond_set_active_slave(struct slave *slave)
 351 {
 352         if (slave->backup) {
 353                 slave->backup = 0;
 354                 bond_queue_slave_event(slave);
 355                 bond_lower_state_changed(slave);
 356         }
 357 }
 358
 359 static inline void bond_set_backup_slave(struct slave *slave)
 360 {
 361         if (!slave->backup) {
 362                 slave->backup = 1;
 363                 bond_queue_slave_event(slave);
 364                 bond_lower_state_changed(slave);
 365         }
 366 }
 367
 368 static inline void bond_set_slave_state(struct slave *slave,
 369                                         int slave_state, bool notify)
 370 {
 371         if (slave->backup == slave_state)
 372                 return;
 373
 374         slave->backup = slave_state;
 375         if (notify) {
 376                 bond_lower_state_changed(slave);
 377                 bond_queue_slave_event(slave);
 378                 slave->should_notify = 0;
 379         } else {
 380                 if (slave->should_notify)
 381                         slave->should_notify = 0;
 382                 else
 383                         slave->should_notify = 1;
 384         }
 385 }
 386
 387 static inline void bond_slave_state_change(struct bonding *bond)
 388 {
 389         struct list_head *iter;
 390         struct slave *tmp;
 391
 392         bond_for_each_slave(bond, tmp, iter) {
 393                 if (tmp->link == BOND_LINK_UP)
 394                         bond_set_active_slave(tmp);
 395                 else if (tmp->link == BOND_LINK_DOWN)
 396                         bond_set_backup_slave(tmp);
 397         }
 398 }
 399
 400 static inline void bond_slave_state_notify(struct bonding *bond)
 401 {
 402         struct list_head *iter;
 403         struct slave *tmp;
 404
 405         bond_for_each_slave(bond, tmp, iter) {
 406                 if (tmp->should_notify) {
 407                         bond_lower_state_changed(tmp);
 408                         tmp->should_notify = 0;
 409                 }
 410         }
 411 }
 412
 413 static inline int bond_slave_state(struct slave *slave)
 414 {
 415         return slave->backup;
 416 }
 417
 418 static inline bool bond_is_active_slave(struct slave *slave)
 419 {
 420         return !bond_slave_state(slave);
 421 }
 422
 423 static inline bool bond_slave_can_tx(struct slave *slave)
 424 {
 425         return bond_slave_is_up(slave) && slave->link == BOND_LINK_UP &&
 426                bond_is_active_slave(slave);
 427 }
 428
 429 static inline bool bond_is_active_slave_dev(const struct net_device *slave_dev)
 430 {
 431         struct slave *slave;
 432         bool active;
 433
 434         rcu_read_lock();
 435         slave = bond_slave_get_rcu(slave_dev);
 436         active = bond_is_active_slave(slave);
 437         rcu_read_unlock();
 438
 439         return active;
 440 }
 441
 442 static inline void bond_hw_addr_copy(u8 *dst, const u8 *src, unsigned int len)
 443 {
 444         if (len == ETH_ALEN) {
 445                 ether_addr_copy(dst, src);
 446                 return;
 447         }
 448
 449         memcpy(dst, src, len);
 450 }
 451
 452 #define BOND_PRI_RESELECT_ALWAYS        0
 453 #define BOND_PRI_RESELECT_BETTER        1
 454 #define BOND_PRI_RESELECT_FAILURE       2
 455
 456 #define BOND_FOM_NONE                   0
 457 #define BOND_FOM_ACTIVE                 1
 458 #define BOND_FOM_FOLLOW                 2
 459
 460 #define BOND_ARP_TARGETS_ANY            0
 461 #define BOND_ARP_TARGETS_ALL            1
 462
 463 #define BOND_ARP_VALIDATE_NONE          0
 464 #define BOND_ARP_VALIDATE_ACTIVE        (1 << BOND_STATE_ACTIVE)
 465 #define BOND_ARP_VALIDATE_BACKUP        (1 << BOND_STATE_BACKUP)
 466 #define BOND_ARP_VALIDATE_ALL           (BOND_ARP_VALIDATE_ACTIVE | \
 467                                          BOND_ARP_VALIDATE_BACKUP)
 468 #define BOND_ARP_FILTER                 (BOND_ARP_VALIDATE_ALL + 1)
 469 #define BOND_ARP_FILTER_ACTIVE          (BOND_ARP_VALIDATE_ACTIVE | \
 470                                          BOND_ARP_FILTER)
 471 #define BOND_ARP_FILTER_BACKUP          (BOND_ARP_VALIDATE_BACKUP | \
 472                                          BOND_ARP_FILTER)
 473
 474 #define BOND_SLAVE_NOTIFY_NOW           true
 475 #define BOND_SLAVE_NOTIFY_LATER         false
 476
 477 static inline int slave_do_arp_validate(struct bonding *bond,
 478                                         struct slave *slave)
 479 {
 480         return bond->params.arp_validate & (1 << bond_slave_state(slave));
 481 }
 482
 483 static inline int slave_do_arp_validate_only(struct bonding *bond)
 484 {
 485         return bond->params.arp_validate & BOND_ARP_FILTER;
 486 }
 487
 488 static inline int bond_is_ip_target_ok(__be32 addr)
 489 {
 490         return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr);
 491 }
 492
 493 /* Get the oldest arp which we've received on this slave for bond's
 494  * arp_targets.
 495  */
 496 static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond,
 497                                                        struct slave *slave)
 498 {
 499         int i = 1;
 500         unsigned long ret = slave->target_last_arp_rx[0];
 501
 502         for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++)
 503                 if (time_before(slave->target_last_arp_rx[i], ret))
 504                         ret = slave->target_last_arp_rx[i];
 505
 506         return ret;
 507 }
 508
 509 static inline unsigned long slave_last_rx(struct bonding *bond,
 510                                         struct slave *slave)
 511 {
 512         if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL)
 513                 return slave_oldest_target_arp_rx(bond, slave);
 514
 515         return slave->last_rx;
 516 }
 517
 518 #ifdef CONFIG_NET_POLL_CONTROLLER
 519 static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave,
 520                                          struct sk_buff *skb)
 521 {
 522         return netpoll_send_skb(slave->np, skb);
 523 }
 524 #else
 525 static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave,
 526                                          struct sk_buff *skb)
 527 {
 528         BUG();
 529         return NETDEV_TX_OK;
 530 }
 531 #endif
 532
 533 static inline void bond_set_slave_inactive_flags(struct slave *slave,
 534                                                  bool notify)
 535 {
 536         if (!bond_is_lb(slave->bond))
 537                 bond_set_slave_state(slave, BOND_STATE_BACKUP, notify);
 538         if (!slave->bond->params.all_slaves_active)
 539                 slave->inactive = 1;
 540 }
 541
 542 static inline void bond_set_slave_active_flags(struct slave *slave,
 543                                                bool notify)
 544 {
 545         bond_set_slave_state(slave, BOND_STATE_ACTIVE, notify);
 546         slave->inactive = 0;
 547 }
 548
 549 static inline bool bond_is_slave_inactive(struct slave *slave)
 550 {
 551         return slave->inactive;
 552 }
 553
 554 static inline void bond_propose_link_state(struct slave *slave, int state)
 555 {
 556         slave->link_new_state = state;
 557 }
 558
 559 static inline void bond_commit_link_state(struct slave *slave, bool notify)
 560 {
 561         if (slave->link_new_state == BOND_LINK_NOCHANGE)
 562                 return;
 563
 564         slave->link = slave->link_new_state;
 565         if (notify) {
 566                 bond_queue_slave_event(slave);
 567                 bond_lower_state_changed(slave);
 568                 slave->should_notify_link = 0;
 569         } else {
 570                 if (slave->should_notify_link)
 571                         slave->should_notify_link = 0;
 572                 else
 573                         slave->should_notify_link = 1;
 574         }
 575 }
 576
 577 static inline void bond_set_slave_link_state(struct slave *slave, int state,
 578                                              bool notify)
 579 {
 580         bond_propose_link_state(slave, state);
 581         bond_commit_link_state(slave, notify);
 582 }
 583
 584 static inline void bond_slave_link_notify(struct bonding *bond)
 585 {
 586         struct list_head *iter;
 587         struct slave *tmp;
 588
 589         bond_for_each_slave(bond, tmp, iter) {
 590                 if (tmp->should_notify_link) {
 591                         bond_queue_slave_event(tmp);
 592                         bond_lower_state_changed(tmp);
 593                         tmp->should_notify_link = 0;
 594                 }
 595         }
 596 }
 597
 598 static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
 599 {
 600         struct in_device *in_dev;
 601         __be32 addr = 0;
 602
 603         rcu_read_lock();
 604         in_dev = __in_dev_get_rcu(dev);
 605
 606         if (in_dev)
 607                 addr = inet_confirm_addr(dev_net(dev), in_dev, dst, local,
 608                                          RT_SCOPE_HOST);
 609         rcu_read_unlock();
 610         return addr;
 611 }
 612
 613 struct bond_net {
 614         struct net              *net;   /* Associated network namespace */
 615         struct list_head        dev_list;
 616 #ifdef CONFIG_PROC_FS
 617         struct proc_dir_entry   *proc_dir;
 618 #endif
 619         struct class_attribute  class_attr_bonding_masters;
 620 };
 621
 622 int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond, struct slave *slave);
 623 netdev_tx_t bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
 624 int bond_create(struct net *net, const char *name);
 625 int bond_create_sysfs(struct bond_net *net);
 626 void bond_destroy_sysfs(struct bond_net *net);
 627 void bond_prepare_sysfs_group(struct bonding *bond);
 628 int bond_sysfs_slave_add(struct slave *slave);
 629 void bond_sysfs_slave_del(struct slave *slave);
 630 int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev,
 631                  struct netlink_ext_ack *extack);
 632 int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
 633 u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb);
 634 int bond_set_carrier(struct bonding *bond);
 635 void bond_select_active_slave(struct bonding *bond);
 636 void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
 637 void bond_create_debugfs(void);
 638 void bond_destroy_debugfs(void);
 639 void bond_debug_register(struct bonding *bond);
 640 void bond_debug_unregister(struct bonding *bond);
 641 void bond_debug_reregister(struct bonding *bond);
 642 const char *bond_mode_name(int mode);
 643 void bond_setup(struct net_device *bond_dev);
 644 unsigned int bond_get_num_tx_queues(void);
 645 int bond_netlink_init(void);
 646 void bond_netlink_fini(void);
 647 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond);
 648 const char *bond_slave_link_status(s8 link);
 649 struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev,
 650                                               struct net_device *end_dev,
 651                                               int level);
 652 int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave);
 653 void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay);
 654 void bond_work_init_all(struct bonding *bond);
 655
 656 #ifdef CONFIG_PROC_FS
 657 void bond_create_proc_entry(struct bonding *bond);
 658 void bond_remove_proc_entry(struct bonding *bond);
 659 void bond_create_proc_dir(struct bond_net *bn);
 660 void bond_destroy_proc_dir(struct bond_net *bn);
 661 #else
 662 static inline void bond_create_proc_entry(struct bonding *bond)
 663 {
 664 }
 665
 666 static inline void bond_remove_proc_entry(struct bonding *bond)
 667 {
 668 }
 669
 670 static inline void bond_create_proc_dir(struct bond_net *bn)
 671 {
 672 }
 673
 674 static inline void bond_destroy_proc_dir(struct bond_net *bn)
 675 {
 676 }
 677 #endif
 678
 679 static inline struct slave *bond_slave_has_mac(struct bonding *bond,
 680                                                const u8 *mac)
 681 {
 682         struct list_head *iter;
 683         struct slave *tmp;
 684
 685         bond_for_each_slave(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 struct slave *bond_slave_has_mac_rcu(struct bonding *bond,
 694                                                const u8 *mac)
 695 {
 696         struct list_head *iter;
 697         struct slave *tmp;
 698
 699         bond_for_each_slave_rcu(bond, tmp, iter)
 700                 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
 701                         return tmp;
 702
 703         return NULL;
 704 }
 705
 706 /* Caller must hold rcu_read_lock() for read */
 707 static inline bool bond_slave_has_mac_rx(struct bonding *bond, const u8 *mac)
 708 {
 709         struct list_head *iter;
 710         struct slave *tmp;
 711         struct netdev_hw_addr *ha;
 712
 713         bond_for_each_slave_rcu(bond, tmp, iter)
 714                 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
 715                         return true;
 716
 717         if (netdev_uc_empty(bond->dev))
 718                 return false;
 719
 720         netdev_for_each_uc_addr(ha, bond->dev)
 721                 if (ether_addr_equal_64bits(mac, ha->addr))
 722                         return true;
 723
 724         return false;
 725 }
 726
 727 /* Check if the ip is present in arp ip list, or first free slot if ip == 0
 728  * Returns -1 if not found, index if found
 729  */
 730 static inline int bond_get_targets_ip(__be32 *targets, __be32 ip)
 731 {
 732         int i;
 733
 734         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
 735                 if (targets[i] == ip)
 736                         return i;
 737                 else if (targets[i] == 0)
 738                         break;
 739
 740         return -1;
 741 }
 742
 743 /* exported from bond_main.c */
 744 extern unsigned int bond_net_id;
 745 extern const struct bond_parm_tbl bond_lacp_tbl[];
 746 extern const struct bond_parm_tbl xmit_hashtype_tbl[];
 747 extern const struct bond_parm_tbl arp_validate_tbl[];
 748 extern const struct bond_parm_tbl arp_all_targets_tbl[];
 749 extern const struct bond_parm_tbl fail_over_mac_tbl[];
 750 extern const struct bond_parm_tbl pri_reselect_tbl[];
 751 extern struct bond_parm_tbl ad_select_tbl[];
 752
 753 /* exported from bond_netlink.c */
 754 extern struct rtnl_link_ops bond_link_ops;
 755
 756 /* exported from bond_sysfs_slave.c */
 757 extern const struct sysfs_ops slave_sysfs_ops;
 758
 759 static inline netdev_tx_t bond_tx_drop(struct net_device *dev, struct sk_buff *skb)
 760 {
 761         atomic_long_inc(&dev->tx_dropped);
 762         dev_kfree_skb_any(skb);
 763         return NET_XMIT_DROP;
 764 }
 765
 766 #endif /* _NET_BONDING_H */