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 93extern atomic_t netpoll_block_tx; 94 95static inline void block_netpoll_tx(void) 96{ 97 atomic_inc(&netpoll_block_tx); 98} 99 100static inline void unblock_netpoll_tx(void) 101{ 102 atomic_dec(&netpoll_block_tx); 103} 104 105static 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 117struct 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 150struct bond_parm_tbl { 151 char *modename; 152 int mode; 153}; 154 155struct 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 186static inline struct slave *to_slave(struct kobject *kobj) 187{ 188 return container_of(kobj, struct slave, kobj); 189} 190 191struct 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 202struct bond_ipsec { 203 struct list_head list; 204 struct xfrm_state *xs; 205}; 206 207/* 208 * Here are the locking policies for the two bonding locks: 209 * Get rcu_read_lock when reading or RTNL when writing slave list. 210 */ 211struct bonding { 212 struct net_device *dev; /* first - useful for panic debug */ 213 struct slave __rcu *curr_active_slave; 214 struct slave __rcu *current_arp_slave; 215 struct slave __rcu *primary_slave; 216 struct bond_up_slave __rcu *usable_slaves; 217 struct bond_up_slave __rcu *all_slaves; 218 bool force_primary; 219 bool notifier_ctx; 220 s32 slave_cnt; /* never change this value outside the attach/detach wrappers */ 221 int (*recv_probe)(const struct sk_buff *, struct bonding *, 222 struct slave *); 223 /* mode_lock is used for mode-specific locking needs, currently used by: 224 * 3ad mode (4) - protect against running bond_3ad_unbind_slave() and 225 * bond_3ad_state_machine_handler() concurrently and also 226 * the access to the state machine shared variables. 227 * TLB mode (5) - to sync the use and modifications of its hash table 228 * ALB mode (6) - to sync the use and modifications of its hash table 229 */ 230 spinlock_t mode_lock; 231 spinlock_t stats_lock; 232 u8 send_peer_notif; 233 u8 igmp_retrans; 234#ifdef CONFIG_PROC_FS 235 struct proc_dir_entry *proc_entry; 236 char proc_file_name[IFNAMSIZ]; 237#endif /* CONFIG_PROC_FS */ 238 struct list_head bond_list; 239 u32 rr_tx_counter; 240 struct ad_bond_info ad_info; 241 struct alb_bond_info alb_info; 242 struct bond_params params; 243 struct workqueue_struct *wq; 244 struct delayed_work mii_work; 245 struct delayed_work arp_work; 246 struct delayed_work alb_work; 247 struct delayed_work ad_work; 248 struct delayed_work mcast_work; 249 struct delayed_work slave_arr_work; 250#ifdef CONFIG_DEBUG_FS 251 /* debugging support via debugfs */ 252 struct dentry *debug_dir; 253#endif /* CONFIG_DEBUG_FS */ 254 struct rtnl_link_stats64 bond_stats; 255#ifdef CONFIG_XFRM_OFFLOAD 256 struct list_head ipsec_list; 257 /* protecting ipsec_list */ 258 spinlock_t ipsec_lock; 259#endif /* CONFIG_XFRM_OFFLOAD */ 260}; 261 262#define bond_slave_get_rcu(dev) \ 263 ((struct slave *) rcu_dereference(dev->rx_handler_data)) 264 265#define bond_slave_get_rtnl(dev) \ 266 ((struct slave *) rtnl_dereference(dev->rx_handler_data)) 267 268void bond_queue_slave_event(struct slave *slave); 269void bond_lower_state_changed(struct slave *slave); 270 271struct bond_vlan_tag { 272 __be16 vlan_proto; 273 unsigned short vlan_id; 274}; 275 276/** 277 * Returns NULL if the net_device does not belong to any of the bond's slaves 278 * 279 * Caller must hold bond lock for read 280 */ 281static inline struct slave *bond_get_slave_by_dev(struct bonding *bond, 282 struct net_device *slave_dev) 283{ 284 return netdev_lower_dev_get_private(bond->dev, slave_dev); 285} 286 287static inline struct bonding *bond_get_bond_by_slave(struct slave *slave) 288{ 289 return slave->bond; 290} 291 292static inline bool bond_should_override_tx_queue(struct bonding *bond) 293{ 294 return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP || 295 BOND_MODE(bond) == BOND_MODE_ROUNDROBIN; 296} 297 298static inline bool bond_is_lb(const struct bonding *bond) 299{ 300 return BOND_MODE(bond) == BOND_MODE_TLB || 301 BOND_MODE(bond) == BOND_MODE_ALB; 302} 303 304static inline bool bond_needs_speed_duplex(const struct bonding *bond) 305{ 306 return BOND_MODE(bond) == BOND_MODE_8023AD || bond_is_lb(bond); 307} 308 309static inline bool bond_is_nondyn_tlb(const struct bonding *bond) 310{ 311 return (bond_is_lb(bond) && bond->params.tlb_dynamic_lb == 0); 312} 313 314static inline bool bond_mode_can_use_xmit_hash(const struct bonding *bond) 315{ 316 return (BOND_MODE(bond) == BOND_MODE_8023AD || 317 BOND_MODE(bond) == BOND_MODE_XOR || 318 BOND_MODE(bond) == BOND_MODE_TLB || 319 BOND_MODE(bond) == BOND_MODE_ALB); 320} 321 322static inline bool bond_mode_uses_xmit_hash(const struct bonding *bond) 323{ 324 return (BOND_MODE(bond) == BOND_MODE_8023AD || 325 BOND_MODE(bond) == BOND_MODE_XOR || 326 bond_is_nondyn_tlb(bond)); 327} 328 329static inline bool bond_mode_uses_arp(int mode) 330{ 331 return mode != BOND_MODE_8023AD && mode != BOND_MODE_TLB && 332 mode != BOND_MODE_ALB; 333} 334 335static inline bool bond_mode_uses_primary(int mode) 336{ 337 return mode == BOND_MODE_ACTIVEBACKUP || mode == BOND_MODE_TLB || 338 mode == BOND_MODE_ALB; 339} 340 341static inline bool bond_uses_primary(struct bonding *bond) 342{ 343 return bond_mode_uses_primary(BOND_MODE(bond)); 344} 345 346static inline struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond) 347{ 348 struct slave *slave = rcu_dereference(bond->curr_active_slave); 349 350 return bond_uses_primary(bond) && slave ? slave->dev : NULL; 351} 352 353static inline bool bond_slave_is_up(struct slave *slave) 354{ 355 return netif_running(slave->dev) && netif_carrier_ok(slave->dev); 356} 357 358static inline void bond_set_active_slave(struct slave *slave) 359{ 360 if (slave->backup) { 361 slave->backup = 0; 362 bond_queue_slave_event(slave); 363 bond_lower_state_changed(slave); 364 } 365} 366 367static inline void bond_set_backup_slave(struct slave *slave) 368{ 369 if (!slave->backup) { 370 slave->backup = 1; 371 bond_queue_slave_event(slave); 372 bond_lower_state_changed(slave); 373 } 374} 375 376static inline void bond_set_slave_state(struct slave *slave, 377 int slave_state, bool notify) 378{ 379 if (slave->backup == slave_state) 380 return; 381 382 slave->backup = slave_state; 383 if (notify) { 384 bond_lower_state_changed(slave); 385 bond_queue_slave_event(slave); 386 slave->should_notify = 0; 387 } else { 388 if (slave->should_notify) 389 slave->should_notify = 0; 390 else 391 slave->should_notify = 1; 392 } 393} 394 395static inline void bond_slave_state_change(struct bonding *bond) 396{ 397 struct list_head *iter; 398 struct slave *tmp; 399 400 bond_for_each_slave(bond, tmp, iter) { 401 if (tmp->link == BOND_LINK_UP) 402 bond_set_active_slave(tmp); 403 else if (tmp->link == BOND_LINK_DOWN) 404 bond_set_backup_slave(tmp); 405 } 406} 407 408static inline void bond_slave_state_notify(struct bonding *bond) 409{ 410 struct list_head *iter; 411 struct slave *tmp; 412 413 bond_for_each_slave(bond, tmp, iter) { 414 if (tmp->should_notify) { 415 bond_lower_state_changed(tmp); 416 tmp->should_notify = 0; 417 } 418 } 419} 420 421static inline int bond_slave_state(struct slave *slave) 422{ 423 return slave->backup; 424} 425 426static inline bool bond_is_active_slave(struct slave *slave) 427{ 428 return !bond_slave_state(slave); 429} 430 431static inline bool bond_slave_can_tx(struct slave *slave) 432{ 433 return bond_slave_is_up(slave) && slave->link == BOND_LINK_UP && 434 bond_is_active_slave(slave); 435} 436 437static inline bool bond_is_active_slave_dev(const struct net_device *slave_dev) 438{ 439 struct slave *slave; 440 bool active; 441 442 rcu_read_lock(); 443 slave = bond_slave_get_rcu(slave_dev); 444 active = bond_is_active_slave(slave); 445 rcu_read_unlock(); 446 447 return active; 448} 449 450static inline void bond_hw_addr_copy(u8 *dst, const u8 *src, unsigned int len) 451{ 452 if (len == ETH_ALEN) { 453 ether_addr_copy(dst, src); 454 return; 455 } 456 457 memcpy(dst, src, len); 458} 459 460#define BOND_PRI_RESELECT_ALWAYS 0 461#define BOND_PRI_RESELECT_BETTER 1 462#define BOND_PRI_RESELECT_FAILURE 2 463 464#define BOND_FOM_NONE 0 465#define BOND_FOM_ACTIVE 1 466#define BOND_FOM_FOLLOW 2 467 468#define BOND_ARP_TARGETS_ANY 0 469#define BOND_ARP_TARGETS_ALL 1 470 471#define BOND_ARP_VALIDATE_NONE 0 472#define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE) 473#define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP) 474#define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE | \ 475 BOND_ARP_VALIDATE_BACKUP) 476#define BOND_ARP_FILTER (BOND_ARP_VALIDATE_ALL + 1) 477#define BOND_ARP_FILTER_ACTIVE (BOND_ARP_VALIDATE_ACTIVE | \ 478 BOND_ARP_FILTER) 479#define BOND_ARP_FILTER_BACKUP (BOND_ARP_VALIDATE_BACKUP | \ 480 BOND_ARP_FILTER) 481 482#define BOND_SLAVE_NOTIFY_NOW true 483#define BOND_SLAVE_NOTIFY_LATER false 484 485static inline int slave_do_arp_validate(struct bonding *bond, 486 struct slave *slave) 487{ 488 return bond->params.arp_validate & (1 << bond_slave_state(slave)); 489} 490 491static inline int slave_do_arp_validate_only(struct bonding *bond) 492{ 493 return bond->params.arp_validate & BOND_ARP_FILTER; 494} 495 496static inline int bond_is_ip_target_ok(__be32 addr) 497{ 498 return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr); 499} 500 501/* Get the oldest arp which we've received on this slave for bond's 502 * arp_targets. 503 */ 504static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond, 505 struct slave *slave) 506{ 507 int i = 1; 508 unsigned long ret = slave->target_last_arp_rx[0]; 509 510 for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++) 511 if (time_before(slave->target_last_arp_rx[i], ret)) 512 ret = slave->target_last_arp_rx[i]; 513 514 return ret; 515} 516 517static inline unsigned long slave_last_rx(struct bonding *bond, 518 struct slave *slave) 519{ 520 if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL) 521 return slave_oldest_target_arp_rx(bond, slave); 522 523 return slave->last_rx; 524} 525 526#ifdef CONFIG_NET_POLL_CONTROLLER 527static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave, 528 struct sk_buff *skb) 529{ 530 return netpoll_send_skb(slave->np, skb); 531} 532#else 533static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave, 534 struct sk_buff *skb) 535{ 536 BUG(); 537 return NETDEV_TX_OK; 538} 539#endif 540 541static inline void bond_set_slave_inactive_flags(struct slave *slave, 542 bool notify) 543{ 544 if (!bond_is_lb(slave->bond)) 545 bond_set_slave_state(slave, BOND_STATE_BACKUP, notify); 546 if (!slave->bond->params.all_slaves_active) 547 slave->inactive = 1; 548} 549 550static inline void bond_set_slave_active_flags(struct slave *slave, 551 bool notify) 552{ 553 bond_set_slave_state(slave, BOND_STATE_ACTIVE, notify); 554 slave->inactive = 0; 555} 556 557static inline bool bond_is_slave_inactive(struct slave *slave) 558{ 559 return slave->inactive; 560} 561 562static inline void bond_propose_link_state(struct slave *slave, int state) 563{ 564 slave->link_new_state = state; 565} 566 567static inline void bond_commit_link_state(struct slave *slave, bool notify) 568{ 569 if (slave->link_new_state == BOND_LINK_NOCHANGE) 570 return; 571 572 slave->link = slave->link_new_state; 573 if (notify) { 574 bond_queue_slave_event(slave); 575 bond_lower_state_changed(slave); 576 slave->should_notify_link = 0; 577 } else { 578 if (slave->should_notify_link) 579 slave->should_notify_link = 0; 580 else 581 slave->should_notify_link = 1; 582 } 583} 584 585static inline void bond_set_slave_link_state(struct slave *slave, int state, 586 bool notify) 587{ 588 bond_propose_link_state(slave, state); 589 bond_commit_link_state(slave, notify); 590} 591 592static inline void bond_slave_link_notify(struct bonding *bond) 593{ 594 struct list_head *iter; 595 struct slave *tmp; 596 597 bond_for_each_slave(bond, tmp, iter) { 598 if (tmp->should_notify_link) { 599 bond_queue_slave_event(tmp); 600 bond_lower_state_changed(tmp); 601 tmp->should_notify_link = 0; 602 } 603 } 604} 605 606static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local) 607{ 608 struct in_device *in_dev; 609 __be32 addr = 0; 610 611 rcu_read_lock(); 612 in_dev = __in_dev_get_rcu(dev); 613 614 if (in_dev) 615 addr = inet_confirm_addr(dev_net(dev), in_dev, dst, local, 616 RT_SCOPE_HOST); 617 rcu_read_unlock(); 618 return addr; 619} 620 621struct bond_net { 622 struct net *net; /* Associated network namespace */ 623 struct list_head dev_list; 624#ifdef CONFIG_PROC_FS 625 struct proc_dir_entry *proc_dir; 626#endif 627 struct class_attribute class_attr_bonding_masters; 628}; 629 630int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond, struct slave *slave); 631netdev_tx_t bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev); 632int bond_create(struct net *net, const char *name); 633int bond_create_sysfs(struct bond_net *net); 634void bond_destroy_sysfs(struct bond_net *net); 635void bond_prepare_sysfs_group(struct bonding *bond); 636int bond_sysfs_slave_add(struct slave *slave); 637void bond_sysfs_slave_del(struct slave *slave); 638int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev, 639 struct netlink_ext_ack *extack); 640int bond_release(struct net_device *bond_dev, struct net_device *slave_dev); 641u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb); 642int bond_set_carrier(struct bonding *bond); 643void bond_select_active_slave(struct bonding *bond); 644void bond_change_active_slave(struct bonding *bond, struct slave *new_active); 645void bond_create_debugfs(void); 646void bond_destroy_debugfs(void); 647void bond_debug_register(struct bonding *bond); 648void bond_debug_unregister(struct bonding *bond); 649void bond_debug_reregister(struct bonding *bond); 650const char *bond_mode_name(int mode); 651void bond_setup(struct net_device *bond_dev); 652unsigned int bond_get_num_tx_queues(void); 653int bond_netlink_init(void); 654void bond_netlink_fini(void); 655struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond); 656const char *bond_slave_link_status(s8 link); 657struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev, 658 struct net_device *end_dev, 659 int level); 660int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave); 661void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay); 662void bond_work_init_all(struct bonding *bond); 663 664#ifdef CONFIG_PROC_FS 665void bond_create_proc_entry(struct bonding *bond); 666void bond_remove_proc_entry(struct bonding *bond); 667void bond_create_proc_dir(struct bond_net *bn); 668void bond_destroy_proc_dir(struct bond_net *bn); 669#else 670static inline void bond_create_proc_entry(struct bonding *bond) 671{ 672} 673 674static inline void bond_remove_proc_entry(struct bonding *bond) 675{ 676} 677 678static inline void bond_create_proc_dir(struct bond_net *bn) 679{ 680} 681 682static inline void bond_destroy_proc_dir(struct bond_net *bn) 683{ 684} 685#endif 686 687static inline struct slave *bond_slave_has_mac(struct bonding *bond, 688 const u8 *mac) 689{ 690 struct list_head *iter; 691 struct slave *tmp; 692 693 bond_for_each_slave(bond, tmp, iter) 694 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr)) 695 return tmp; 696 697 return NULL; 698} 699 700/* Caller must hold rcu_read_lock() for read */ 701static inline bool bond_slave_has_mac_rcu(struct bonding *bond, const u8 *mac) 702{ 703 struct list_head *iter; 704 struct slave *tmp; 705 706 bond_for_each_slave_rcu(bond, tmp, iter) 707 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr)) 708 return true; 709 return false; 710} 711 712/* Check if the ip is present in arp ip list, or first free slot if ip == 0 713 * Returns -1 if not found, index if found 714 */ 715static inline int bond_get_targets_ip(__be32 *targets, __be32 ip) 716{ 717 int i; 718 719 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) 720 if (targets[i] == ip) 721 return i; 722 else if (targets[i] == 0) 723 break; 724 725 return -1; 726} 727 728/* exported from bond_main.c */ 729extern unsigned int bond_net_id; 730extern const struct bond_parm_tbl bond_lacp_tbl[]; 731extern const struct bond_parm_tbl xmit_hashtype_tbl[]; 732extern const struct bond_parm_tbl arp_validate_tbl[]; 733extern const struct bond_parm_tbl arp_all_targets_tbl[]; 734extern const struct bond_parm_tbl fail_over_mac_tbl[]; 735extern const struct bond_parm_tbl pri_reselect_tbl[]; 736extern struct bond_parm_tbl ad_select_tbl[]; 737 738/* exported from bond_netlink.c */ 739extern struct rtnl_link_ops bond_link_ops; 740 741/* exported from bond_sysfs_slave.c */ 742extern const struct sysfs_ops slave_sysfs_ops; 743 744/* exported from bond_3ad.c */ 745extern const u8 lacpdu_mcast_addr[]; 746 747static inline netdev_tx_t 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 return NET_XMIT_DROP; 752} 753 754#endif /* _NET_BONDING_H */ 755