1/* SPDX-License-Identifier: GPL-1.0+ */ 2/* 3 * Bond several ethernet interfaces into a Cisco, running 'Etherchannel'. 4 * 5 * Portions are (c) Copyright 1995 Simon "Guru Aleph-Null" Janes 6 * NCM: Network and Communications Management, Inc. 7 * 8 * BUT, I'm the one who modified it for ethernet, so: 9 * (c) Copyright 1999, Thomas Davis, tadavis@lbl.gov 10 * 11 */ 12 13#ifndef _NET_BONDING_H 14#define _NET_BONDING_H 15 16#include <linux/timer.h> 17#include <linux/proc_fs.h> 18#include <linux/if_bonding.h> 19#include <linux/cpumask.h> 20#include <linux/in6.h> 21#include <linux/netpoll.h> 22#include <linux/inetdevice.h> 23#include <linux/etherdevice.h> 24#include <linux/reciprocal_div.h> 25#include <linux/if_link.h> 26 27#include <net/bond_3ad.h> 28#include <net/bond_alb.h> 29#include <net/bond_options.h> 30#include <net/ipv6.h> 31#include <net/addrconf.h> 32 33#define BOND_MAX_ARP_TARGETS 16 34#define BOND_MAX_NS_TARGETS BOND_MAX_ARP_TARGETS 35 36#define BOND_DEFAULT_MIIMON 100 37 38#ifndef __long_aligned 39#define __long_aligned __attribute__((aligned((sizeof(long))))) 40#endif 41 42#define slave_info(bond_dev, slave_dev, fmt, ...) \ 43 netdev_info(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__) 44#define slave_warn(bond_dev, slave_dev, fmt, ...) \ 45 netdev_warn(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__) 46#define slave_dbg(bond_dev, slave_dev, fmt, ...) \ 47 netdev_dbg(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__) 48#define slave_err(bond_dev, slave_dev, fmt, ...) \ 49 netdev_err(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__) 50 51#define BOND_MODE(bond) ((bond)->params.mode) 52 53/* slave list primitives */ 54#define bond_slave_list(bond) (&(bond)->dev->adj_list.lower) 55 56#define bond_has_slaves(bond) !list_empty(bond_slave_list(bond)) 57 58/* IMPORTANT: bond_first/last_slave can return NULL in case of an empty list */ 59#define bond_first_slave(bond) \ 60 (bond_has_slaves(bond) ? \ 61 netdev_adjacent_get_private(bond_slave_list(bond)->next) : \ 62 NULL) 63#define bond_last_slave(bond) \ 64 (bond_has_slaves(bond) ? \ 65 netdev_adjacent_get_private(bond_slave_list(bond)->prev) : \ 66 NULL) 67 68/* Caller must have rcu_read_lock */ 69#define bond_first_slave_rcu(bond) \ 70 netdev_lower_get_first_private_rcu(bond->dev) 71 72#define bond_is_first_slave(bond, pos) (pos == bond_first_slave(bond)) 73#define bond_is_last_slave(bond, pos) (pos == bond_last_slave(bond)) 74 75/** 76 * bond_for_each_slave - iterate over all slaves 77 * @bond: the bond holding this list 78 * @pos: current slave 79 * @iter: list_head * iterator 80 * 81 * Caller must hold RTNL 82 */ 83#define bond_for_each_slave(bond, pos, iter) \ 84 netdev_for_each_lower_private((bond)->dev, pos, iter) 85 86/* Caller must have rcu_read_lock */ 87#define bond_for_each_slave_rcu(bond, pos, iter) \ 88 netdev_for_each_lower_private_rcu((bond)->dev, pos, iter) 89 90#define BOND_XFRM_FEATURES (NETIF_F_HW_ESP | NETIF_F_HW_ESP_TX_CSUM | \ 91 NETIF_F_GSO_ESP) 92 93#ifdef CONFIG_NET_POLL_CONTROLLER 94extern atomic_t netpoll_block_tx; 95 96static inline void block_netpoll_tx(void) 97{ 98 atomic_inc(&netpoll_block_tx); 99} 100 101static inline void unblock_netpoll_tx(void) 102{ 103 atomic_dec(&netpoll_block_tx); 104} 105 106static inline int is_netpoll_tx_blocked(struct net_device *dev) 107{ 108 if (unlikely(netpoll_tx_running(dev))) 109 return atomic_read(&netpoll_block_tx); 110 return 0; 111} 112#else 113#define block_netpoll_tx() 114#define unblock_netpoll_tx() 115#define is_netpoll_tx_blocked(dev) (0) 116#endif 117 118struct bond_params { 119 int mode; 120 int xmit_policy; 121 int miimon; 122 u8 num_peer_notif; 123 u8 missed_max; 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_active; 133 int lacp_fast; 134 unsigned int min_links; 135 int ad_select; 136 char primary[IFNAMSIZ]; 137 int primary_reselect; 138 __be32 arp_targets[BOND_MAX_ARP_TARGETS]; 139 int tx_queues; 140 int all_slaves_active; 141 int resend_igmp; 142 int lp_interval; 143 int packets_per_slave; 144 int tlb_dynamic_lb; 145 struct reciprocal_value reciprocal_packets_per_slave; 146 u16 ad_actor_sys_prio; 147 u16 ad_user_port_key; 148#if IS_ENABLED(CONFIG_IPV6) 149 struct in6_addr ns_targets[BOND_MAX_NS_TARGETS]; 150#endif 151 int coupled_control; 152 153 /* 2 bytes of padding : see ether_addr_equal_64bits() */ 154 u8 ad_actor_system[ETH_ALEN + 2]; 155}; 156 157struct slave { 158 struct net_device *dev; /* first - useful for panic debug */ 159 struct bonding *bond; /* our master */ 160 int delay; 161 /* all 4 in jiffies */ 162 unsigned long last_link_up; 163 unsigned long last_tx; 164 unsigned long last_rx; 165 unsigned long target_last_arp_rx[BOND_MAX_ARP_TARGETS]; 166 s8 link; /* one of BOND_LINK_XXXX */ 167 s8 link_new_state; /* one of BOND_LINK_XXXX */ 168 u8 backup:1, /* indicates backup slave. Value corresponds with 169 BOND_STATE_ACTIVE and BOND_STATE_BACKUP */ 170 inactive:1, /* indicates inactive slave */ 171 rx_disabled:1, /* indicates whether slave's Rx is disabled */ 172 should_notify:1, /* indicates whether the state changed */ 173 should_notify_link:1; /* indicates whether the link changed */ 174 u8 duplex; 175 u32 original_mtu; 176 u32 link_failure_count; 177 u32 speed; 178 u16 queue_id; 179 u8 perm_hwaddr[MAX_ADDR_LEN]; 180 int prio; 181 struct ad_slave_info *ad_info; 182 struct tlb_slave_info tlb_info; 183#ifdef CONFIG_NET_POLL_CONTROLLER 184 struct netpoll *np; 185#endif 186 struct delayed_work notify_work; 187 struct kobject kobj; 188 struct rtnl_link_stats64 slave_stats; 189}; 190 191static inline struct slave *to_slave(struct kobject *kobj) 192{ 193 return container_of(kobj, struct slave, kobj); 194} 195 196struct bond_up_slave { 197 unsigned int count; 198 struct rcu_head rcu; 199 struct slave *arr[]; 200}; 201 202/* 203 * Link pseudo-state only used internally by monitors 204 */ 205#define BOND_LINK_NOCHANGE -1 206 207struct bond_ipsec { 208 struct list_head list; 209 struct xfrm_state *xs; 210}; 211 212/* 213 * Here are the locking policies for the two bonding locks: 214 * Get rcu_read_lock when reading or RTNL when writing slave list. 215 */ 216struct bonding { 217 struct net_device *dev; /* first - useful for panic debug */ 218 struct slave __rcu *curr_active_slave; 219 struct slave __rcu *current_arp_slave; 220 struct slave __rcu *primary_slave; 221 struct bond_up_slave __rcu *usable_slaves; 222 struct bond_up_slave __rcu *all_slaves; 223 bool force_primary; 224 bool notifier_ctx; 225 s32 slave_cnt; /* never change this value outside the attach/detach wrappers */ 226 int (*recv_probe)(const struct sk_buff *, struct bonding *, 227 struct slave *); 228 /* mode_lock is used for mode-specific locking needs, currently used by: 229 * 3ad mode (4) - protect against running bond_3ad_unbind_slave() and 230 * bond_3ad_state_machine_handler() concurrently and also 231 * the access to the state machine shared variables. 232 * TLB mode (5) - to sync the use and modifications of its hash table 233 * ALB mode (6) - to sync the use and modifications of its hash table 234 */ 235 spinlock_t mode_lock; 236 spinlock_t stats_lock; 237 u32 send_peer_notif; 238 u8 igmp_retrans; 239#ifdef CONFIG_PROC_FS 240 struct proc_dir_entry *proc_entry; 241 char proc_file_name[IFNAMSIZ]; 242#endif /* CONFIG_PROC_FS */ 243 struct list_head bond_list; 244 u32 __percpu *rr_tx_counter; 245 struct ad_bond_info ad_info; 246 struct alb_bond_info alb_info; 247 struct bond_params params; 248 struct workqueue_struct *wq; 249 struct delayed_work mii_work; 250 struct delayed_work arp_work; 251 struct delayed_work alb_work; 252 struct delayed_work ad_work; 253 struct delayed_work mcast_work; 254 struct delayed_work slave_arr_work; 255#ifdef CONFIG_DEBUG_FS 256 /* debugging support via debugfs */ 257 struct dentry *debug_dir; 258#endif /* CONFIG_DEBUG_FS */ 259 struct rtnl_link_stats64 bond_stats; 260#ifdef CONFIG_XFRM_OFFLOAD 261 struct list_head ipsec_list; 262 /* protecting ipsec_list */ 263 spinlock_t ipsec_lock; 264#endif /* CONFIG_XFRM_OFFLOAD */ 265 struct bpf_prog *xdp_prog; 266}; 267 268#define bond_slave_get_rcu(dev) \ 269 ((struct slave *) rcu_dereference(dev->rx_handler_data)) 270 271#define bond_slave_get_rtnl(dev) \ 272 ((struct slave *) rtnl_dereference(dev->rx_handler_data)) 273 274void bond_queue_slave_event(struct slave *slave); 275void bond_lower_state_changed(struct slave *slave); 276 277struct bond_vlan_tag { 278 __be16 vlan_proto; 279 unsigned short vlan_id; 280}; 281 282/* 283 * Returns NULL if the net_device does not belong to any of the bond's slaves 284 * 285 * Caller must hold bond lock for read 286 */ 287static inline struct slave *bond_get_slave_by_dev(struct bonding *bond, 288 struct net_device *slave_dev) 289{ 290 return netdev_lower_dev_get_private(bond->dev, slave_dev); 291} 292 293static inline struct bonding *bond_get_bond_by_slave(struct slave *slave) 294{ 295 return slave->bond; 296} 297 298static inline bool bond_should_override_tx_queue(struct bonding *bond) 299{ 300 return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP || 301 BOND_MODE(bond) == BOND_MODE_ROUNDROBIN; 302} 303 304static inline bool bond_is_lb(const struct bonding *bond) 305{ 306 return BOND_MODE(bond) == BOND_MODE_TLB || 307 BOND_MODE(bond) == BOND_MODE_ALB; 308} 309 310static inline bool bond_needs_speed_duplex(const struct bonding *bond) 311{ 312 return BOND_MODE(bond) == BOND_MODE_8023AD || bond_is_lb(bond); 313} 314 315static inline bool bond_is_nondyn_tlb(const struct bonding *bond) 316{ 317 return (bond_is_lb(bond) && bond->params.tlb_dynamic_lb == 0); 318} 319 320static inline bool bond_mode_can_use_xmit_hash(const struct bonding *bond) 321{ 322 return (BOND_MODE(bond) == BOND_MODE_8023AD || 323 BOND_MODE(bond) == BOND_MODE_XOR || 324 BOND_MODE(bond) == BOND_MODE_TLB || 325 BOND_MODE(bond) == BOND_MODE_ALB); 326} 327 328static inline bool bond_mode_uses_xmit_hash(const struct bonding *bond) 329{ 330 return (BOND_MODE(bond) == BOND_MODE_8023AD || 331 BOND_MODE(bond) == BOND_MODE_XOR || 332 bond_is_nondyn_tlb(bond)); 333} 334 335static inline bool bond_mode_uses_arp(int mode) 336{ 337 return mode != BOND_MODE_8023AD && mode != BOND_MODE_TLB && 338 mode != BOND_MODE_ALB; 339} 340 341static inline bool bond_mode_uses_primary(int mode) 342{ 343 return mode == BOND_MODE_ACTIVEBACKUP || mode == BOND_MODE_TLB || 344 mode == BOND_MODE_ALB; 345} 346 347static inline bool bond_uses_primary(struct bonding *bond) 348{ 349 return bond_mode_uses_primary(BOND_MODE(bond)); 350} 351 352static inline struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond) 353{ 354 struct slave *slave = rcu_dereference_rtnl(bond->curr_active_slave); 355 356 return bond_uses_primary(bond) && slave ? slave->dev : NULL; 357} 358 359static inline bool bond_slave_is_up(struct slave *slave) 360{ 361 return netif_running(slave->dev) && netif_carrier_ok(slave->dev); 362} 363 364static inline void bond_set_active_slave(struct slave *slave) 365{ 366 if (slave->backup) { 367 slave->backup = 0; 368 bond_queue_slave_event(slave); 369 bond_lower_state_changed(slave); 370 } 371} 372 373static inline void bond_set_backup_slave(struct slave *slave) 374{ 375 if (!slave->backup) { 376 slave->backup = 1; 377 bond_queue_slave_event(slave); 378 bond_lower_state_changed(slave); 379 } 380} 381 382static inline void bond_set_slave_state(struct slave *slave, 383 int slave_state, bool notify) 384{ 385 if (slave->backup == slave_state) 386 return; 387 388 slave->backup = slave_state; 389 if (notify) { 390 bond_lower_state_changed(slave); 391 bond_queue_slave_event(slave); 392 slave->should_notify = 0; 393 } else { 394 if (slave->should_notify) 395 slave->should_notify = 0; 396 else 397 slave->should_notify = 1; 398 } 399} 400 401static inline void bond_slave_state_change(struct bonding *bond) 402{ 403 struct list_head *iter; 404 struct slave *tmp; 405 406 bond_for_each_slave(bond, tmp, iter) { 407 if (tmp->link == BOND_LINK_UP) 408 bond_set_active_slave(tmp); 409 else if (tmp->link == BOND_LINK_DOWN) 410 bond_set_backup_slave(tmp); 411 } 412} 413 414static inline void bond_slave_state_notify(struct bonding *bond) 415{ 416 struct list_head *iter; 417 struct slave *tmp; 418 419 bond_for_each_slave(bond, tmp, iter) { 420 if (tmp->should_notify) { 421 bond_lower_state_changed(tmp); 422 tmp->should_notify = 0; 423 } 424 } 425} 426 427static inline int bond_slave_state(struct slave *slave) 428{ 429 return slave->backup; 430} 431 432static inline bool bond_is_active_slave(struct slave *slave) 433{ 434 return !bond_slave_state(slave); 435} 436 437static inline bool bond_slave_can_tx(struct slave *slave) 438{ 439 return bond_slave_is_up(slave) && slave->link == BOND_LINK_UP && 440 bond_is_active_slave(slave); 441} 442 443static inline bool bond_is_active_slave_dev(const struct net_device *slave_dev) 444{ 445 struct slave *slave; 446 bool active; 447 448 rcu_read_lock(); 449 slave = bond_slave_get_rcu(slave_dev); 450 active = bond_is_active_slave(slave); 451 rcu_read_unlock(); 452 453 return active; 454} 455 456static inline void bond_hw_addr_copy(u8 *dst, const u8 *src, unsigned int len) 457{ 458 if (len == ETH_ALEN) { 459 ether_addr_copy(dst, src); 460 return; 461 } 462 463 memcpy(dst, src, len); 464} 465 466#define BOND_PRI_RESELECT_ALWAYS 0 467#define BOND_PRI_RESELECT_BETTER 1 468#define BOND_PRI_RESELECT_FAILURE 2 469 470#define BOND_FOM_NONE 0 471#define BOND_FOM_ACTIVE 1 472#define BOND_FOM_FOLLOW 2 473 474#define BOND_ARP_TARGETS_ANY 0 475#define BOND_ARP_TARGETS_ALL 1 476 477#define BOND_ARP_VALIDATE_NONE 0 478#define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE) 479#define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP) 480#define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE | \ 481 BOND_ARP_VALIDATE_BACKUP) 482#define BOND_ARP_FILTER (BOND_ARP_VALIDATE_ALL + 1) 483#define BOND_ARP_FILTER_ACTIVE (BOND_ARP_VALIDATE_ACTIVE | \ 484 BOND_ARP_FILTER) 485#define BOND_ARP_FILTER_BACKUP (BOND_ARP_VALIDATE_BACKUP | \ 486 BOND_ARP_FILTER) 487 488#define BOND_SLAVE_NOTIFY_NOW true 489#define BOND_SLAVE_NOTIFY_LATER false 490 491static inline int slave_do_arp_validate(struct bonding *bond, 492 struct slave *slave) 493{ 494 return bond->params.arp_validate & (1 << bond_slave_state(slave)); 495} 496 497static inline int slave_do_arp_validate_only(struct bonding *bond) 498{ 499 return bond->params.arp_validate & BOND_ARP_FILTER; 500} 501 502static inline int bond_is_ip_target_ok(__be32 addr) 503{ 504 return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr); 505} 506 507#if IS_ENABLED(CONFIG_IPV6) 508static inline int bond_is_ip6_target_ok(struct in6_addr *addr) 509{ 510 return !ipv6_addr_any(addr) && 511 !ipv6_addr_loopback(addr) && 512 !ipv6_addr_is_multicast(addr); 513} 514#endif 515 516/* Get the oldest arp which we've received on this slave for bond's 517 * arp_targets. 518 */ 519static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond, 520 struct slave *slave) 521{ 522 int i = 1; 523 unsigned long ret = slave->target_last_arp_rx[0]; 524 525 for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++) 526 if (time_before(slave->target_last_arp_rx[i], ret)) 527 ret = slave->target_last_arp_rx[i]; 528 529 return ret; 530} 531 532static inline unsigned long slave_last_rx(struct bonding *bond, 533 struct slave *slave) 534{ 535 if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL) 536 return slave_oldest_target_arp_rx(bond, slave); 537 538 return slave->last_rx; 539} 540 541static inline void slave_update_last_tx(struct slave *slave) 542{ 543 WRITE_ONCE(slave->last_tx, jiffies); 544} 545 546static inline unsigned long slave_last_tx(struct slave *slave) 547{ 548 return READ_ONCE(slave->last_tx); 549} 550 551#ifdef CONFIG_NET_POLL_CONTROLLER 552static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave, 553 struct sk_buff *skb) 554{ 555 return netpoll_send_skb(slave->np, skb); 556} 557#else 558static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave, 559 struct sk_buff *skb) 560{ 561 BUG(); 562 return NETDEV_TX_OK; 563} 564#endif 565 566static inline void bond_set_slave_inactive_flags(struct slave *slave, 567 bool notify) 568{ 569 if (!bond_is_lb(slave->bond)) 570 bond_set_slave_state(slave, BOND_STATE_BACKUP, notify); 571 if (!slave->bond->params.all_slaves_active) 572 slave->inactive = 1; 573 if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) 574 slave->rx_disabled = 1; 575} 576 577static inline void bond_set_slave_tx_disabled_flags(struct slave *slave, 578 bool notify) 579{ 580 bond_set_slave_state(slave, BOND_STATE_BACKUP, notify); 581} 582 583static inline void bond_set_slave_active_flags(struct slave *slave, 584 bool notify) 585{ 586 bond_set_slave_state(slave, BOND_STATE_ACTIVE, notify); 587 slave->inactive = 0; 588 if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) 589 slave->rx_disabled = 0; 590} 591 592static inline void bond_set_slave_rx_enabled_flags(struct slave *slave, 593 bool notify) 594{ 595 slave->rx_disabled = 0; 596} 597 598static inline bool bond_is_slave_inactive(struct slave *slave) 599{ 600 return slave->inactive; 601} 602 603static inline bool bond_is_slave_rx_disabled(struct slave *slave) 604{ 605 return slave->rx_disabled; 606} 607 608static inline void bond_propose_link_state(struct slave *slave, int state) 609{ 610 slave->link_new_state = state; 611} 612 613static inline void bond_commit_link_state(struct slave *slave, bool notify) 614{ 615 if (slave->link_new_state == BOND_LINK_NOCHANGE) 616 return; 617 618 slave->link = slave->link_new_state; 619 if (notify) { 620 bond_queue_slave_event(slave); 621 bond_lower_state_changed(slave); 622 slave->should_notify_link = 0; 623 } else { 624 if (slave->should_notify_link) 625 slave->should_notify_link = 0; 626 else 627 slave->should_notify_link = 1; 628 } 629} 630 631static inline void bond_set_slave_link_state(struct slave *slave, int state, 632 bool notify) 633{ 634 bond_propose_link_state(slave, state); 635 bond_commit_link_state(slave, notify); 636} 637 638static inline void bond_slave_link_notify(struct bonding *bond) 639{ 640 struct list_head *iter; 641 struct slave *tmp; 642 643 bond_for_each_slave(bond, tmp, iter) { 644 if (tmp->should_notify_link) { 645 bond_queue_slave_event(tmp); 646 bond_lower_state_changed(tmp); 647 tmp->should_notify_link = 0; 648 } 649 } 650} 651 652static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local) 653{ 654 struct in_device *in_dev; 655 __be32 addr = 0; 656 657 rcu_read_lock(); 658 in_dev = __in_dev_get_rcu(dev); 659 660 if (in_dev) 661 addr = inet_confirm_addr(dev_net(dev), in_dev, dst, local, 662 RT_SCOPE_HOST); 663 rcu_read_unlock(); 664 return addr; 665} 666 667struct bond_net { 668 struct net *net; /* Associated network namespace */ 669 struct list_head dev_list; 670#ifdef CONFIG_PROC_FS 671 struct proc_dir_entry *proc_dir; 672#endif 673 struct class_attribute class_attr_bonding_masters; 674}; 675 676int bond_rcv_validate(const struct sk_buff *skb, struct bonding *bond, struct slave *slave); 677netdev_tx_t bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev); 678int bond_create(struct net *net, const char *name); 679int bond_create_sysfs(struct bond_net *net); 680void bond_destroy_sysfs(struct bond_net *net); 681void bond_prepare_sysfs_group(struct bonding *bond); 682int bond_sysfs_slave_add(struct slave *slave); 683void bond_sysfs_slave_del(struct slave *slave); 684void bond_xdp_set_features(struct net_device *bond_dev); 685int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev, 686 struct netlink_ext_ack *extack); 687int bond_release(struct net_device *bond_dev, struct net_device *slave_dev); 688u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb); 689int bond_set_carrier(struct bonding *bond); 690void bond_select_active_slave(struct bonding *bond); 691void bond_change_active_slave(struct bonding *bond, struct slave *new_active); 692void bond_create_debugfs(void); 693void bond_destroy_debugfs(void); 694void bond_debug_register(struct bonding *bond); 695void bond_debug_unregister(struct bonding *bond); 696void bond_debug_reregister(struct bonding *bond); 697const char *bond_mode_name(int mode); 698void bond_setup(struct net_device *bond_dev); 699unsigned int bond_get_num_tx_queues(void); 700int bond_netlink_init(void); 701void bond_netlink_fini(void); 702struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond); 703const char *bond_slave_link_status(s8 link); 704struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev, 705 struct net_device *end_dev, 706 int level); 707int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave); 708void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay); 709void bond_work_init_all(struct bonding *bond); 710 711#ifdef CONFIG_PROC_FS 712void bond_create_proc_entry(struct bonding *bond); 713void bond_remove_proc_entry(struct bonding *bond); 714void bond_create_proc_dir(struct bond_net *bn); 715void bond_destroy_proc_dir(struct bond_net *bn); 716#else 717static inline void bond_create_proc_entry(struct bonding *bond) 718{ 719} 720 721static inline void bond_remove_proc_entry(struct bonding *bond) 722{ 723} 724 725static inline void bond_create_proc_dir(struct bond_net *bn) 726{ 727} 728 729static inline void bond_destroy_proc_dir(struct bond_net *bn) 730{ 731} 732#endif 733 734static inline struct slave *bond_slave_has_mac(struct bonding *bond, 735 const u8 *mac) 736{ 737 struct list_head *iter; 738 struct slave *tmp; 739 740 bond_for_each_slave(bond, tmp, iter) 741 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr)) 742 return tmp; 743 744 return NULL; 745} 746 747/* Caller must hold rcu_read_lock() for read */ 748static inline bool bond_slave_has_mac_rcu(struct bonding *bond, const u8 *mac) 749{ 750 struct list_head *iter; 751 struct slave *tmp; 752 753 bond_for_each_slave_rcu(bond, tmp, iter) 754 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr)) 755 return true; 756 return false; 757} 758 759/* Check if the ip is present in arp ip list, or first free slot if ip == 0 760 * Returns -1 if not found, index if found 761 */ 762static inline int bond_get_targets_ip(__be32 *targets, __be32 ip) 763{ 764 int i; 765 766 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) 767 if (targets[i] == ip) 768 return i; 769 else if (targets[i] == 0) 770 break; 771 772 return -1; 773} 774 775#if IS_ENABLED(CONFIG_IPV6) 776static inline int bond_get_targets_ip6(struct in6_addr *targets, struct in6_addr *ip) 777{ 778 struct in6_addr mcaddr; 779 int i; 780 781 for (i = 0; i < BOND_MAX_NS_TARGETS; i++) { 782 addrconf_addr_solict_mult(&targets[i], &mcaddr); 783 if ((ipv6_addr_equal(&targets[i], ip)) || 784 (ipv6_addr_equal(&mcaddr, ip))) 785 return i; 786 else if (ipv6_addr_any(&targets[i])) 787 break; 788 } 789 790 return -1; 791} 792#endif 793 794/* exported from bond_main.c */ 795extern unsigned int bond_net_id; 796 797/* exported from bond_netlink.c */ 798extern struct rtnl_link_ops bond_link_ops; 799 800/* exported from bond_sysfs_slave.c */ 801extern const struct sysfs_ops slave_sysfs_ops; 802 803/* exported from bond_3ad.c */ 804extern const u8 lacpdu_mcast_addr[]; 805 806static inline netdev_tx_t bond_tx_drop(struct net_device *dev, struct sk_buff *skb) 807{ 808 dev_core_stats_tx_dropped_inc(dev); 809 dev_kfree_skb_any(skb); 810 return NET_XMIT_DROP; 811} 812 813#endif /* _NET_BONDING_H */ 814