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 #define BOND_TLS_FEATURES (NETIF_F_HW_TLS_TX | NETIF_F_HW_TLS_RX)
  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 static inline struct slave *to_slave(struct kobject *kobj)
 189 {
 190         return container_of(kobj, struct slave, kobj);
 191 }
 192
 193 struct bond_up_slave {
 194         unsigned int    count;
 195         struct rcu_head rcu;
 196         struct slave    *arr[];
 197 };
 198
 199 /*
 200  * Link pseudo-state only used internally by monitors
 201  */
 202 #define BOND_LINK_NOCHANGE -1
 203
 204 struct bond_ipsec {
 205         struct list_head list;
 206         struct xfrm_state *xs;
 207 };
 208
 209 /*
 210  * Here are the locking policies for the two bonding locks:
 211  * Get rcu_read_lock when reading or RTNL when writing slave list.
 212  */
 213 struct bonding {
 214         struct   net_device *dev; /* first - useful for panic debug */
 215         struct   slave __rcu *curr_active_slave;
 216         struct   slave __rcu *current_arp_slave;
 217         struct   slave __rcu *primary_slave;
 218         struct   bond_up_slave __rcu *usable_slaves;
 219         struct   bond_up_slave __rcu *all_slaves;
 220         bool     force_primary;
 221         s32      slave_cnt; /* never change this value outside the attach/detach wrappers */
 222         int     (*recv_probe)(const struct sk_buff *, struct bonding *,
 223                               struct slave *);
 224         /* mode_lock is used for mode-specific locking needs, currently used by:
 225          * 3ad mode (4) - protect against running bond_3ad_unbind_slave() and
 226          *                bond_3ad_state_machine_handler() concurrently and also
 227          *                the access to the state machine shared variables.
 228          * TLB mode (5) - to sync the use and modifications of its hash table
 229          * ALB mode (6) - to sync the use and modifications of its hash table
 230          */
 231         spinlock_t mode_lock;
 232         spinlock_t stats_lock;
 233         u8       send_peer_notif;
 234         u8       igmp_retrans;
 235 #ifdef CONFIG_PROC_FS
 236         struct   proc_dir_entry *proc_entry;
 237         char     proc_file_name[IFNAMSIZ];
 238 #endif /* CONFIG_PROC_FS */
 239         struct   list_head bond_list;
 240         u32 __percpu *rr_tx_counter;
 241         struct   ad_bond_info ad_info;
 242         struct   alb_bond_info alb_info;
 243         struct   bond_params params;
 244         struct   workqueue_struct *wq;
 245         struct   delayed_work mii_work;
 246         struct   delayed_work arp_work;
 247         struct   delayed_work alb_work;
 248         struct   delayed_work ad_work;
 249         struct   delayed_work mcast_work;
 250         struct   delayed_work slave_arr_work;
 251 #ifdef CONFIG_DEBUG_FS
 252         /* debugging support via debugfs */
 253         struct   dentry *debug_dir;
 254 #endif /* CONFIG_DEBUG_FS */
 255         struct rtnl_link_stats64 bond_stats;
 256 #ifdef CONFIG_XFRM_OFFLOAD
 257         struct list_head ipsec_list;
 258         /* protecting ipsec_list */
 259         spinlock_t ipsec_lock;
 260 #endif /* CONFIG_XFRM_OFFLOAD */
 261 };
 262
 263 #define bond_slave_get_rcu(dev) \
 264         ((struct slave *) rcu_dereference(dev->rx_handler_data))
 265
 266 #define bond_slave_get_rtnl(dev) \
 267         ((struct slave *) rtnl_dereference(dev->rx_handler_data))
 268
 269 void bond_queue_slave_event(struct slave *slave);
 270 void bond_lower_state_changed(struct slave *slave);
 271
 272 struct bond_vlan_tag {
 273         __be16          vlan_proto;
 274         unsigned short  vlan_id;
 275 };
 276
 277 bool bond_sk_check(struct bonding *bond);
 278
 279 /**
 280  * Returns NULL if the net_device does not belong to any of the bond's slaves
 281  *
 282  * Caller must hold bond lock for read
 283  */
 284 static inline struct slave *bond_get_slave_by_dev(struct bonding *bond,
 285                                                   struct net_device *slave_dev)
 286 {
 287         return netdev_lower_dev_get_private(bond->dev, slave_dev);
 288 }
 289
 290 static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
 291 {
 292         return slave->bond;
 293 }
 294
 295 static inline bool bond_should_override_tx_queue(struct bonding *bond)
 296 {
 297         return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP ||
 298                BOND_MODE(bond) == BOND_MODE_ROUNDROBIN;
 299 }
 300
 301 static inline bool bond_is_lb(const struct bonding *bond)
 302 {
 303         return BOND_MODE(bond) == BOND_MODE_TLB ||
 304                BOND_MODE(bond) == BOND_MODE_ALB;
 305 }
 306
 307 static inline bool bond_needs_speed_duplex(const struct bonding *bond)
 308 {
 309         return BOND_MODE(bond) == BOND_MODE_8023AD || bond_is_lb(bond);
 310 }
 311
 312 static inline bool bond_is_nondyn_tlb(const struct bonding *bond)
 313 {
 314         return (bond_is_lb(bond) && bond->params.tlb_dynamic_lb == 0);
 315 }
 316
 317 static inline bool bond_mode_can_use_xmit_hash(const struct bonding *bond)
 318 {
 319         return (BOND_MODE(bond) == BOND_MODE_8023AD ||
 320                 BOND_MODE(bond) == BOND_MODE_XOR ||
 321                 BOND_MODE(bond) == BOND_MODE_TLB ||
 322                 BOND_MODE(bond) == BOND_MODE_ALB);
 323 }
 324
 325 static inline bool bond_mode_uses_xmit_hash(const struct bonding *bond)
 326 {
 327         return (BOND_MODE(bond) == BOND_MODE_8023AD ||
 328                 BOND_MODE(bond) == BOND_MODE_XOR ||
 329                 bond_is_nondyn_tlb(bond));
 330 }
 331
 332 static inline bool bond_mode_uses_arp(int mode)
 333 {
 334         return mode != BOND_MODE_8023AD && mode != BOND_MODE_TLB &&
 335                mode != BOND_MODE_ALB;
 336 }
 337
 338 static inline bool bond_mode_uses_primary(int mode)
 339 {
 340         return mode == BOND_MODE_ACTIVEBACKUP || mode == BOND_MODE_TLB ||
 341                mode == BOND_MODE_ALB;
 342 }
 343
 344 static inline bool bond_uses_primary(struct bonding *bond)
 345 {
 346         return bond_mode_uses_primary(BOND_MODE(bond));
 347 }
 348
 349 static inline struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
 350 {
 351         struct slave *slave = rcu_dereference(bond->curr_active_slave);
 352
 353         return bond_uses_primary(bond) && slave ? slave->dev : NULL;
 354 }
 355
 356 static inline bool bond_slave_is_up(struct slave *slave)
 357 {
 358         return netif_running(slave->dev) && netif_carrier_ok(slave->dev);
 359 }
 360
 361 static inline void bond_set_active_slave(struct slave *slave)
 362 {
 363         if (slave->backup) {
 364                 slave->backup = 0;
 365                 bond_queue_slave_event(slave);
 366                 bond_lower_state_changed(slave);
 367         }
 368 }
 369
 370 static inline void bond_set_backup_slave(struct slave *slave)
 371 {
 372         if (!slave->backup) {
 373                 slave->backup = 1;
 374                 bond_queue_slave_event(slave);
 375                 bond_lower_state_changed(slave);
 376         }
 377 }
 378
 379 static inline void bond_set_slave_state(struct slave *slave,
 380                                         int slave_state, bool notify)
 381 {
 382         if (slave->backup == slave_state)
 383                 return;
 384
 385         slave->backup = slave_state;
 386         if (notify) {
 387                 bond_lower_state_changed(slave);
 388                 bond_queue_slave_event(slave);
 389                 slave->should_notify = 0;
 390         } else {
 391                 if (slave->should_notify)
 392                         slave->should_notify = 0;
 393                 else
 394                         slave->should_notify = 1;
 395         }
 396 }
 397
 398 static inline void bond_slave_state_change(struct bonding *bond)
 399 {
 400         struct list_head *iter;
 401         struct slave *tmp;
 402
 403         bond_for_each_slave(bond, tmp, iter) {
 404                 if (tmp->link == BOND_LINK_UP)
 405                         bond_set_active_slave(tmp);
 406                 else if (tmp->link == BOND_LINK_DOWN)
 407                         bond_set_backup_slave(tmp);
 408         }
 409 }
 410
 411 static inline void bond_slave_state_notify(struct bonding *bond)
 412 {
 413         struct list_head *iter;
 414         struct slave *tmp;
 415
 416         bond_for_each_slave(bond, tmp, iter) {
 417                 if (tmp->should_notify) {
 418                         bond_lower_state_changed(tmp);
 419                         tmp->should_notify = 0;
 420                 }
 421         }
 422 }
 423
 424 static inline int bond_slave_state(struct slave *slave)
 425 {
 426         return slave->backup;
 427 }
 428
 429 static inline bool bond_is_active_slave(struct slave *slave)
 430 {
 431         return !bond_slave_state(slave);
 432 }
 433
 434 static inline bool bond_slave_can_tx(struct slave *slave)
 435 {
 436         return bond_slave_is_up(slave) && slave->link == BOND_LINK_UP &&
 437                bond_is_active_slave(slave);
 438 }
 439
 440 static inline bool bond_is_active_slave_dev(const struct net_device *slave_dev)
 441 {
 442         struct slave *slave;
 443         bool active;
 444
 445         rcu_read_lock();
 446         slave = bond_slave_get_rcu(slave_dev);
 447         active = bond_is_active_slave(slave);
 448         rcu_read_unlock();
 449
 450         return active;
 451 }
 452
 453 static inline void bond_hw_addr_copy(u8 *dst, const u8 *src, unsigned int len)
 454 {
 455         if (len == ETH_ALEN) {
 456                 ether_addr_copy(dst, src);
 457                 return;
 458         }
 459
 460         memcpy(dst, src, len);
 461 }
 462
 463 #define BOND_PRI_RESELECT_ALWAYS        0
 464 #define BOND_PRI_RESELECT_BETTER        1
 465 #define BOND_PRI_RESELECT_FAILURE       2
 466
 467 #define BOND_FOM_NONE                   0
 468 #define BOND_FOM_ACTIVE                 1
 469 #define BOND_FOM_FOLLOW                 2
 470
 471 #define BOND_ARP_TARGETS_ANY            0
 472 #define BOND_ARP_TARGETS_ALL            1
 473
 474 #define BOND_ARP_VALIDATE_NONE          0
 475 #define BOND_ARP_VALIDATE_ACTIVE        (1 << BOND_STATE_ACTIVE)
 476 #define BOND_ARP_VALIDATE_BACKUP        (1 << BOND_STATE_BACKUP)
 477 #define BOND_ARP_VALIDATE_ALL           (BOND_ARP_VALIDATE_ACTIVE | \
 478                                          BOND_ARP_VALIDATE_BACKUP)
 479 #define BOND_ARP_FILTER                 (BOND_ARP_VALIDATE_ALL + 1)
 480 #define BOND_ARP_FILTER_ACTIVE          (BOND_ARP_VALIDATE_ACTIVE | \
 481                                          BOND_ARP_FILTER)
 482 #define BOND_ARP_FILTER_BACKUP          (BOND_ARP_VALIDATE_BACKUP | \
 483                                          BOND_ARP_FILTER)
 484
 485 #define BOND_SLAVE_NOTIFY_NOW           true
 486 #define BOND_SLAVE_NOTIFY_LATER         false
 487
 488 static inline int slave_do_arp_validate(struct bonding *bond,
 489                                         struct slave *slave)
 490 {
 491         return bond->params.arp_validate & (1 << bond_slave_state(slave));
 492 }
 493
 494 static inline int slave_do_arp_validate_only(struct bonding *bond)
 495 {
 496         return bond->params.arp_validate & BOND_ARP_FILTER;
 497 }
 498
 499 static inline int bond_is_ip_target_ok(__be32 addr)
 500 {
 501         return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr);
 502 }
 503
 504 /* Get the oldest arp which we've received on this slave for bond's
 505  * arp_targets.
 506  */
 507 static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond,
 508                                                        struct slave *slave)
 509 {
 510         int i = 1;
 511         unsigned long ret = slave->target_last_arp_rx[0];
 512
 513         for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++)
 514                 if (time_before(slave->target_last_arp_rx[i], ret))
 515                         ret = slave->target_last_arp_rx[i];
 516
 517         return ret;
 518 }
 519
 520 static inline unsigned long slave_last_rx(struct bonding *bond,
 521                                         struct slave *slave)
 522 {
 523         if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL)
 524                 return slave_oldest_target_arp_rx(bond, slave);
 525
 526         return slave->last_rx;
 527 }
 528
 529 #ifdef CONFIG_NET_POLL_CONTROLLER
 530 static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave,
 531                                          struct sk_buff *skb)
 532 {
 533         return netpoll_send_skb(slave->np, skb);
 534 }
 535 #else
 536 static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave,
 537                                          struct sk_buff *skb)
 538 {
 539         BUG();
 540         return NETDEV_TX_OK;
 541 }
 542 #endif
 543
 544 static inline void bond_set_slave_inactive_flags(struct slave *slave,
 545                                                  bool notify)
 546 {
 547         if (!bond_is_lb(slave->bond))
 548                 bond_set_slave_state(slave, BOND_STATE_BACKUP, notify);
 549         if (!slave->bond->params.all_slaves_active)
 550                 slave->inactive = 1;
 551 }
 552
 553 static inline void bond_set_slave_active_flags(struct slave *slave,
 554                                                bool notify)
 555 {
 556         bond_set_slave_state(slave, BOND_STATE_ACTIVE, notify);
 557         slave->inactive = 0;
 558 }
 559
 560 static inline bool bond_is_slave_inactive(struct slave *slave)
 561 {
 562         return slave->inactive;
 563 }
 564
 565 static inline void bond_propose_link_state(struct slave *slave, int state)
 566 {
 567         slave->link_new_state = state;
 568 }
 569
 570 static inline void bond_commit_link_state(struct slave *slave, bool notify)
 571 {
 572         if (slave->link_new_state == BOND_LINK_NOCHANGE)
 573                 return;
 574
 575         slave->link = slave->link_new_state;
 576         if (notify) {
 577                 bond_queue_slave_event(slave);
 578                 bond_lower_state_changed(slave);
 579                 slave->should_notify_link = 0;
 580         } else {
 581                 if (slave->should_notify_link)
 582                         slave->should_notify_link = 0;
 583                 else
 584                         slave->should_notify_link = 1;
 585         }
 586 }
 587
 588 static inline void bond_set_slave_link_state(struct slave *slave, int state,
 589                                              bool notify)
 590 {
 591         bond_propose_link_state(slave, state);
 592         bond_commit_link_state(slave, notify);
 593 }
 594
 595 static inline void bond_slave_link_notify(struct bonding *bond)
 596 {
 597         struct list_head *iter;
 598         struct slave *tmp;
 599
 600         bond_for_each_slave(bond, tmp, iter) {
 601                 if (tmp->should_notify_link) {
 602                         bond_queue_slave_event(tmp);
 603                         bond_lower_state_changed(tmp);
 604                         tmp->should_notify_link = 0;
 605                 }
 606         }
 607 }
 608
 609 static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
 610 {
 611         struct in_device *in_dev;
 612         __be32 addr = 0;
 613
 614         rcu_read_lock();
 615         in_dev = __in_dev_get_rcu(dev);
 616
 617         if (in_dev)
 618                 addr = inet_confirm_addr(dev_net(dev), in_dev, dst, local,
 619                                          RT_SCOPE_HOST);
 620         rcu_read_unlock();
 621         return addr;
 622 }
 623
 624 struct bond_net {
 625         struct net              *net;   /* Associated network namespace */
 626         struct list_head        dev_list;
 627 #ifdef CONFIG_PROC_FS
 628         struct proc_dir_entry   *proc_dir;
 629 #endif
 630         struct class_attribute  class_attr_bonding_masters;
 631 };
 632
 633 int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond, struct slave *slave);
 634 netdev_tx_t bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
 635 int bond_create(struct net *net, const char *name);
 636 int bond_create_sysfs(struct bond_net *net);
 637 void bond_destroy_sysfs(struct bond_net *net);
 638 void bond_prepare_sysfs_group(struct bonding *bond);
 639 int bond_sysfs_slave_add(struct slave *slave);
 640 void bond_sysfs_slave_del(struct slave *slave);
 641 int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev,
 642                  struct netlink_ext_ack *extack);
 643 int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
 644 u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb);
 645 int bond_set_carrier(struct bonding *bond);
 646 void bond_select_active_slave(struct bonding *bond);
 647 void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
 648 void bond_create_debugfs(void);
 649 void bond_destroy_debugfs(void);
 650 void bond_debug_register(struct bonding *bond);
 651 void bond_debug_unregister(struct bonding *bond);
 652 void bond_debug_reregister(struct bonding *bond);
 653 const char *bond_mode_name(int mode);
 654 void bond_setup(struct net_device *bond_dev);
 655 unsigned int bond_get_num_tx_queues(void);
 656 int bond_netlink_init(void);
 657 void bond_netlink_fini(void);
 658 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond);
 659 const char *bond_slave_link_status(s8 link);
 660 struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev,
 661                                               struct net_device *end_dev,
 662                                               int level);
 663 int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave);
 664 void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay);
 665 void bond_work_init_all(struct bonding *bond);
 666
 667 #ifdef CONFIG_PROC_FS
 668 void bond_create_proc_entry(struct bonding *bond);
 669 void bond_remove_proc_entry(struct bonding *bond);
 670 void bond_create_proc_dir(struct bond_net *bn);
 671 void bond_destroy_proc_dir(struct bond_net *bn);
 672 #else
 673 static inline void bond_create_proc_entry(struct bonding *bond)
 674 {
 675 }
 676
 677 static inline void bond_remove_proc_entry(struct bonding *bond)
 678 {
 679 }
 680
 681 static inline void bond_create_proc_dir(struct bond_net *bn)
 682 {
 683 }
 684
 685 static inline void bond_destroy_proc_dir(struct bond_net *bn)
 686 {
 687 }
 688 #endif
 689
 690 static inline struct slave *bond_slave_has_mac(struct bonding *bond,
 691                                                const u8 *mac)
 692 {
 693         struct list_head *iter;
 694         struct slave *tmp;
 695
 696         bond_for_each_slave(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 struct slave *bond_slave_has_mac_rcu(struct bonding *bond,
 705                                                const u8 *mac)
 706 {
 707         struct list_head *iter;
 708         struct slave *tmp;
 709
 710         bond_for_each_slave_rcu(bond, tmp, iter)
 711                 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
 712                         return tmp;
 713
 714         return NULL;
 715 }
 716
 717 /* Caller must hold rcu_read_lock() for read */
 718 static inline bool bond_slave_has_mac_rx(struct bonding *bond, const u8 *mac)
 719 {
 720         struct list_head *iter;
 721         struct slave *tmp;
 722         struct netdev_hw_addr *ha;
 723
 724         bond_for_each_slave_rcu(bond, tmp, iter)
 725                 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
 726                         return true;
 727
 728         if (netdev_uc_empty(bond->dev))
 729                 return false;
 730
 731         netdev_for_each_uc_addr(ha, bond->dev)
 732                 if (ether_addr_equal_64bits(mac, ha->addr))
 733                         return true;
 734
 735         return false;
 736 }
 737
 738 /* Check if the ip is present in arp ip list, or first free slot if ip == 0
 739  * Returns -1 if not found, index if found
 740  */
 741 static inline int bond_get_targets_ip(__be32 *targets, __be32 ip)
 742 {
 743         int i;
 744
 745         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
 746                 if (targets[i] == ip)
 747                         return i;
 748                 else if (targets[i] == 0)
 749                         break;
 750
 751         return -1;
 752 }
 753
 754 /* exported from bond_main.c */
 755 extern unsigned int bond_net_id;
 756 extern const struct bond_parm_tbl bond_lacp_tbl[];
 757 extern const struct bond_parm_tbl xmit_hashtype_tbl[];
 758 extern const struct bond_parm_tbl arp_validate_tbl[];
 759 extern const struct bond_parm_tbl arp_all_targets_tbl[];
 760 extern const struct bond_parm_tbl fail_over_mac_tbl[];
 761 extern const struct bond_parm_tbl pri_reselect_tbl[];
 762 extern struct bond_parm_tbl ad_select_tbl[];
 763
 764 /* exported from bond_netlink.c */
 765 extern struct rtnl_link_ops bond_link_ops;
 766
 767 /* exported from bond_sysfs_slave.c */
 768 extern const struct sysfs_ops slave_sysfs_ops;
 769
 770 static inline netdev_tx_t bond_tx_drop(struct net_device *dev, struct sk_buff *skb)
 771 {
 772         atomic_long_inc(&dev->tx_dropped);
 773         dev_kfree_skb_any(skb);
 774         return NET_XMIT_DROP;
 775 }
 776
 777 #endif /* _NET_BONDING_H */