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 #include <net/ipv6.h> 33 #include <net/addrconf.h> 34 35 #define BOND_MAX_ARP_TARGETS 16 36 #define BOND_MAX_NS_TARGETS BOND_MAX_ARP_TARGETS 37 38 #define BOND_DEFAULT_MIIMON 100 39 40 #ifndef __long_aligned 41 #define __long_aligned __attribute__((aligned((sizeof(long))))) 42 #endif 43 44 #define slave_info(bond_dev, slave_dev, fmt, ...) \ 45 netdev_info(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__) 46 #define slave_warn(bond_dev, slave_dev, fmt, ...) \ 47 netdev_warn(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__) 48 #define slave_dbg(bond_dev, slave_dev, fmt, ...) \ 49 netdev_dbg(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__) 50 #define slave_err(bond_dev, slave_dev, fmt, ...) \ 51 netdev_err(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__) 52 53 #define BOND_MODE(bond) ((bond)->params.mode) 54 55 /* slave list primitives */ 56 #define bond_slave_list(bond) (&(bond)->dev->adj_list.lower) 57 58 #define bond_has_slaves(bond) !list_empty(bond_slave_list(bond)) 59 60 /* IMPORTANT: bond_first/last_slave can return NULL in case of an empty list */ 61 #define bond_first_slave(bond) \ 62 (bond_has_slaves(bond) ? \ 63 netdev_adjacent_get_private(bond_slave_list(bond)->next) : \ 64 NULL) 65 #define bond_last_slave(bond) \ 66 (bond_has_slaves(bond) ? \ 67 netdev_adjacent_get_private(bond_slave_list(bond)->prev) : \ 68 NULL) 69 70 /* Caller must have rcu_read_lock */ 71 #define bond_first_slave_rcu(bond) \ 72 netdev_lower_get_first_private_rcu(bond->dev) 73 74 #define bond_is_first_slave(bond, pos) (pos == bond_first_slave(bond)) 75 #define bond_is_last_slave(bond, pos) (pos == bond_last_slave(bond)) 76 77 /** 78 * bond_for_each_slave - iterate over all slaves 79 * @bond: the bond holding this list 80 * @pos: current slave 81 * @iter: list_head * iterator 82 * 83 * Caller must hold RTNL 84 */ 85 #define bond_for_each_slave(bond, pos, iter) \ 86 netdev_for_each_lower_private((bond)->dev, pos, iter) 87 88 /* Caller must have rcu_read_lock */ 89 #define bond_for_each_slave_rcu(bond, pos, iter) \ 90 netdev_for_each_lower_private_rcu((bond)->dev, pos, iter) 91 92 #define BOND_XFRM_FEATURES (NETIF_F_HW_ESP | NETIF_F_HW_ESP_TX_CSUM | \ 93 NETIF_F_GSO_ESP) 94 95 #ifdef CONFIG_NET_POLL_CONTROLLER 96 extern atomic_t netpoll_block_tx; 97 98 static inline void block_netpoll_tx(void) 99 { 100 atomic_inc(&netpoll_block_tx); 101 } 102 103 static inline void unblock_netpoll_tx(void) 104 { 105 atomic_dec(&netpoll_block_tx); 106 } 107 108 static inline int is_netpoll_tx_blocked(struct net_device *dev) 109 { 110 if (unlikely(netpoll_tx_running(dev))) 111 return atomic_read(&netpoll_block_tx); 112 return 0; 113 } 114 #else 115 #define block_netpoll_tx() 116 #define unblock_netpoll_tx() 117 #define is_netpoll_tx_blocked(dev) (0) 118 #endif 119 120 struct bond_params { 121 int mode; 122 int xmit_policy; 123 int miimon; 124 u8 num_peer_notif; 125 u8 missed_max; 126 int arp_interval; 127 int arp_validate; 128 int arp_all_targets; 129 int use_carrier; 130 int fail_over_mac; 131 int updelay; 132 int downdelay; 133 int peer_notif_delay; 134 int lacp_active; 135 int lacp_fast; 136 unsigned int min_links; 137 int ad_select; 138 char primary[IFNAMSIZ]; 139 int primary_reselect; 140 __be32 arp_targets[BOND_MAX_ARP_TARGETS]; 141 int tx_queues; 142 int all_slaves_active; 143 int resend_igmp; 144 int lp_interval; 145 int packets_per_slave; 146 int tlb_dynamic_lb; 147 struct reciprocal_value reciprocal_packets_per_slave; 148 u16 ad_actor_sys_prio; 149 u16 ad_user_port_key; 150 #if IS_ENABLED(CONFIG_IPV6) 151 struct in6_addr ns_targets[BOND_MAX_NS_TARGETS]; 152 #endif 153 154 /* 2 bytes of padding : see ether_addr_equal_64bits() */ 155 u8 ad_actor_system[ETH_ALEN + 2]; 156 }; 157 158 struct slave { 159 struct net_device *dev; /* first - useful for panic debug */ 160 struct bonding *bond; /* our master */ 161 int delay; 162 /* all 4 in jiffies */ 163 unsigned long last_link_up; 164 unsigned long last_tx; 165 unsigned long last_rx; 166 unsigned long target_last_arp_rx[BOND_MAX_ARP_TARGETS]; 167 s8 link; /* one of BOND_LINK_XXXX */ 168 s8 link_new_state; /* one of BOND_LINK_XXXX */ 169 u8 backup:1, /* indicates backup slave. Value corresponds with 170 BOND_STATE_ACTIVE and BOND_STATE_BACKUP */ 171 inactive:1, /* indicates inactive slave */ 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 }; 190 191 static inline struct slave *to_slave(struct kobject *kobj) 192 { 193 return container_of(kobj, struct slave, kobj); 194 } 195 196 struct 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 -1 206 207 struct 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 */ 216 struct 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 s32 slave_cnt; /* never change this value outside the attach/detach wrappers */ 225 int (*recv_probe)(const struct sk_buff *, struct bonding *, 226 struct slave *); 227 /* mode_lock is used for mode-specific locking needs, currently used by: 228 * 3ad mode (4) - protect against running bond_3ad_unbind_slave() and 229 * bond_3ad_state_machine_handler() concurrently and also 230 * the access to the state machine shared variables. 231 * TLB mode (5) - to sync the use and modifications of its hash table 232 * ALB mode (6) - to sync the use and modifications of its hash table 233 */ 234 spinlock_t mode_lock; 235 spinlock_t stats_lock; 236 u8 send_peer_notif; 237 u8 igmp_retrans; 238 #ifdef CONFIG_PROC_FS 239 struct proc_dir_entry *proc_entry; 240 char proc_file_name[IFNAMSIZ]; 241 #endif /* CONFIG_PROC_FS */ 242 struct list_head bond_list; 243 u32 __percpu *rr_tx_counter; 244 struct ad_bond_info ad_info; 245 struct alb_bond_info alb_info; 246 struct bond_params params; 247 struct workqueue_struct *wq; 248 struct delayed_work mii_work; 249 struct delayed_work arp_work; 250 struct delayed_work alb_work; 251 struct delayed_work ad_work; 252 struct delayed_work mcast_work; 253 struct delayed_work slave_arr_work; 254 #ifdef CONFIG_DEBUG_FS 255 /* debugging support via debugfs */ 256 struct dentry *debug_dir; 257 #endif /* CONFIG_DEBUG_FS */ 258 struct rtnl_link_stats64 bond_stats; 259 #ifdef CONFIG_XFRM_OFFLOAD 260 struct list_head ipsec_list; 261 /* protecting ipsec_list */ 262 spinlock_t ipsec_lock; 263 #endif /* CONFIG_XFRM_OFFLOAD */ 264 struct bpf_prog *xdp_prog; 265 }; 266 267 #define bond_slave_get_rcu(dev) \ 268 ((struct slave *) rcu_dereference(dev->rx_handler_data)) 269 270 #define bond_slave_get_rtnl(dev) \ 271 ((struct slave *) rtnl_dereference(dev->rx_handler_data)) 272 273 void bond_queue_slave_event(struct slave *slave); 274 void bond_lower_state_changed(struct slave *slave); 275 276 struct bond_vlan_tag { 277 __be16 vlan_proto; 278 unsigned short vlan_id; 279 }; 280 281 /** 282 * Returns NULL if the net_device does not belong to any of the bond's slaves 283 * 284 * Caller must hold bond lock for read 285 */ 286 static inline struct slave *bond_get_slave_by_dev(struct bonding *bond, 287 struct net_device *slave_dev) 288 { 289 return netdev_lower_dev_get_private(bond->dev, slave_dev); 290 } 291 292 static inline struct bonding *bond_get_bond_by_slave(struct slave *slave) 293 { 294 return slave->bond; 295 } 296 297 static inline bool bond_should_override_tx_queue(struct bonding *bond) 298 { 299 return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP || 300 BOND_MODE(bond) == BOND_MODE_ROUNDROBIN; 301 } 302 303 static inline bool bond_is_lb(const struct bonding *bond) 304 { 305 return BOND_MODE(bond) == BOND_MODE_TLB || 306 BOND_MODE(bond) == BOND_MODE_ALB; 307 } 308 309 static inline bool bond_needs_speed_duplex(const struct bonding *bond) 310 { 311 return BOND_MODE(bond) == BOND_MODE_8023AD || bond_is_lb(bond); 312 } 313 314 static inline bool bond_is_nondyn_tlb(const struct bonding *bond) 315 { 316 return (bond_is_lb(bond) && bond->params.tlb_dynamic_lb == 0); 317 } 318 319 static inline bool bond_mode_can_use_xmit_hash(const struct bonding *bond) 320 { 321 return (BOND_MODE(bond) == BOND_MODE_8023AD || 322 BOND_MODE(bond) == BOND_MODE_XOR || 323 BOND_MODE(bond) == BOND_MODE_TLB || 324 BOND_MODE(bond) == BOND_MODE_ALB); 325 } 326 327 static inline bool bond_mode_uses_xmit_hash(const struct bonding *bond) 328 { 329 return (BOND_MODE(bond) == BOND_MODE_8023AD || 330 BOND_MODE(bond) == BOND_MODE_XOR || 331 bond_is_nondyn_tlb(bond)); 332 } 333 334 static inline bool bond_mode_uses_arp(int mode) 335 { 336 return mode != BOND_MODE_8023AD && mode != BOND_MODE_TLB && 337 mode != BOND_MODE_ALB; 338 } 339 340 static inline bool bond_mode_uses_primary(int mode) 341 { 342 return mode == BOND_MODE_ACTIVEBACKUP || mode == BOND_MODE_TLB || 343 mode == BOND_MODE_ALB; 344 } 345 346 static inline bool bond_uses_primary(struct bonding *bond) 347 { 348 return bond_mode_uses_primary(BOND_MODE(bond)); 349 } 350 351 static inline struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond) 352 { 353 struct slave *slave = rcu_dereference_rtnl(bond->curr_active_slave); 354 355 return bond_uses_primary(bond) && slave ? slave->dev : NULL; 356 } 357 358 static inline bool bond_slave_is_up(struct slave *slave) 359 { 360 return netif_running(slave->dev) && netif_carrier_ok(slave->dev); 361 } 362 363 static inline void bond_set_active_slave(struct slave *slave) 364 { 365 if (slave->backup) { 366 slave->backup = 0; 367 bond_queue_slave_event(slave); 368 bond_lower_state_changed(slave); 369 } 370 } 371 372 static inline void bond_set_backup_slave(struct slave *slave) 373 { 374 if (!slave->backup) { 375 slave->backup = 1; 376 bond_queue_slave_event(slave); 377 bond_lower_state_changed(slave); 378 } 379 } 380 381 static inline void bond_set_slave_state(struct slave *slave, 382 int slave_state, bool notify) 383 { 384 if (slave->backup == slave_state) 385 return; 386 387 slave->backup = slave_state; 388 if (notify) { 389 bond_lower_state_changed(slave); 390 bond_queue_slave_event(slave); 391 slave->should_notify = 0; 392 } else { 393 if (slave->should_notify) 394 slave->should_notify = 0; 395 else 396 slave->should_notify = 1; 397 } 398 } 399 400 static inline void bond_slave_state_change(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->link == BOND_LINK_UP) 407 bond_set_active_slave(tmp); 408 else if (tmp->link == BOND_LINK_DOWN) 409 bond_set_backup_slave(tmp); 410 } 411 } 412 413 static inline void bond_slave_state_notify(struct bonding *bond) 414 { 415 struct list_head *iter; 416 struct slave *tmp; 417 418 bond_for_each_slave(bond, tmp, iter) { 419 if (tmp->should_notify) { 420 bond_lower_state_changed(tmp); 421 tmp->should_notify = 0; 422 } 423 } 424 } 425 426 static inline int bond_slave_state(struct slave *slave) 427 { 428 return slave->backup; 429 } 430 431 static inline bool bond_is_active_slave(struct slave *slave) 432 { 433 return !bond_slave_state(slave); 434 } 435 436 static inline bool bond_slave_can_tx(struct slave *slave) 437 { 438 return bond_slave_is_up(slave) && slave->link == BOND_LINK_UP && 439 bond_is_active_slave(slave); 440 } 441 442 static inline bool bond_is_active_slave_dev(const struct net_device *slave_dev) 443 { 444 struct slave *slave; 445 bool active; 446 447 rcu_read_lock(); 448 slave = bond_slave_get_rcu(slave_dev); 449 active = bond_is_active_slave(slave); 450 rcu_read_unlock(); 451 452 return active; 453 } 454 455 static inline void bond_hw_addr_copy(u8 *dst, const u8 *src, unsigned int len) 456 { 457 if (len == ETH_ALEN) { 458 ether_addr_copy(dst, src); 459 return; 460 } 461 462 memcpy(dst, src, len); 463 } 464 465 #define BOND_PRI_RESELECT_ALWAYS 0 466 #define BOND_PRI_RESELECT_BETTER 1 467 #define BOND_PRI_RESELECT_FAILURE 2 468 469 #define BOND_FOM_NONE 0 470 #define BOND_FOM_ACTIVE 1 471 #define BOND_FOM_FOLLOW 2 472 473 #define BOND_ARP_TARGETS_ANY 0 474 #define BOND_ARP_TARGETS_ALL 1 475 476 #define BOND_ARP_VALIDATE_NONE 0 477 #define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE) 478 #define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP) 479 #define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE | \ 480 BOND_ARP_VALIDATE_BACKUP) 481 #define BOND_ARP_FILTER (BOND_ARP_VALIDATE_ALL + 1) 482 #define BOND_ARP_FILTER_ACTIVE (BOND_ARP_VALIDATE_ACTIVE | \ 483 BOND_ARP_FILTER) 484 #define BOND_ARP_FILTER_BACKUP (BOND_ARP_VALIDATE_BACKUP | \ 485 BOND_ARP_FILTER) 486 487 #define BOND_SLAVE_NOTIFY_NOW true 488 #define BOND_SLAVE_NOTIFY_LATER false 489 490 static inline int slave_do_arp_validate(struct bonding *bond, 491 struct slave *slave) 492 { 493 return bond->params.arp_validate & (1 << bond_slave_state(slave)); 494 } 495 496 static inline int slave_do_arp_validate_only(struct bonding *bond) 497 { 498 return bond->params.arp_validate & BOND_ARP_FILTER; 499 } 500 501 static inline int bond_is_ip_target_ok(__be32 addr) 502 { 503 return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr); 504 } 505 506 #if IS_ENABLED(CONFIG_IPV6) 507 static inline int bond_is_ip6_target_ok(struct in6_addr *addr) 508 { 509 return !ipv6_addr_any(addr) && 510 !ipv6_addr_loopback(addr) && 511 !ipv6_addr_is_multicast(addr); 512 } 513 #endif 514 515 /* Get the oldest arp which we've received on this slave for bond's 516 * arp_targets. 517 */ 518 static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond, 519 struct slave *slave) 520 { 521 int i = 1; 522 unsigned long ret = slave->target_last_arp_rx[0]; 523 524 for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++) 525 if (time_before(slave->target_last_arp_rx[i], ret)) 526 ret = slave->target_last_arp_rx[i]; 527 528 return ret; 529 } 530 531 static inline unsigned long slave_last_rx(struct bonding *bond, 532 struct slave *slave) 533 { 534 if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL) 535 return slave_oldest_target_arp_rx(bond, slave); 536 537 return slave->last_rx; 538 } 539 540 static inline void slave_update_last_tx(struct slave *slave) 541 { 542 WRITE_ONCE(slave->last_tx, jiffies); 543 } 544 545 static inline unsigned long slave_last_tx(struct slave *slave) 546 { 547 return READ_ONCE(slave->last_tx); 548 } 549 550 #ifdef CONFIG_NET_POLL_CONTROLLER 551 static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave, 552 struct sk_buff *skb) 553 { 554 return netpoll_send_skb(slave->np, skb); 555 } 556 #else 557 static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave, 558 struct sk_buff *skb) 559 { 560 BUG(); 561 return NETDEV_TX_OK; 562 } 563 #endif 564 565 static inline void bond_set_slave_inactive_flags(struct slave *slave, 566 bool notify) 567 { 568 if (!bond_is_lb(slave->bond)) 569 bond_set_slave_state(slave, BOND_STATE_BACKUP, notify); 570 if (!slave->bond->params.all_slaves_active) 571 slave->inactive = 1; 572 } 573 574 static inline void bond_set_slave_active_flags(struct slave *slave, 575 bool notify) 576 { 577 bond_set_slave_state(slave, BOND_STATE_ACTIVE, notify); 578 slave->inactive = 0; 579 } 580 581 static inline bool bond_is_slave_inactive(struct slave *slave) 582 { 583 return slave->inactive; 584 } 585 586 static inline void bond_propose_link_state(struct slave *slave, int state) 587 { 588 slave->link_new_state = state; 589 } 590 591 static inline void bond_commit_link_state(struct slave *slave, bool notify) 592 { 593 if (slave->link_new_state == BOND_LINK_NOCHANGE) 594 return; 595 596 slave->link = slave->link_new_state; 597 if (notify) { 598 bond_queue_slave_event(slave); 599 bond_lower_state_changed(slave); 600 slave->should_notify_link = 0; 601 } else { 602 if (slave->should_notify_link) 603 slave->should_notify_link = 0; 604 else 605 slave->should_notify_link = 1; 606 } 607 } 608 609 static inline void bond_set_slave_link_state(struct slave *slave, int state, 610 bool notify) 611 { 612 bond_propose_link_state(slave, state); 613 bond_commit_link_state(slave, notify); 614 } 615 616 static inline void bond_slave_link_notify(struct bonding *bond) 617 { 618 struct list_head *iter; 619 struct slave *tmp; 620 621 bond_for_each_slave(bond, tmp, iter) { 622 if (tmp->should_notify_link) { 623 bond_queue_slave_event(tmp); 624 bond_lower_state_changed(tmp); 625 tmp->should_notify_link = 0; 626 } 627 } 628 } 629 630 static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local) 631 { 632 struct in_device *in_dev; 633 __be32 addr = 0; 634 635 rcu_read_lock(); 636 in_dev = __in_dev_get_rcu(dev); 637 638 if (in_dev) 639 addr = inet_confirm_addr(dev_net(dev), in_dev, dst, local, 640 RT_SCOPE_HOST); 641 rcu_read_unlock(); 642 return addr; 643 } 644 645 struct bond_net { 646 struct net *net; /* Associated network namespace */ 647 struct list_head dev_list; 648 #ifdef CONFIG_PROC_FS 649 struct proc_dir_entry *proc_dir; 650 #endif 651 struct class_attribute class_attr_bonding_masters; 652 }; 653 654 int bond_rcv_validate(const struct sk_buff *skb, struct bonding *bond, struct slave *slave); 655 netdev_tx_t bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev); 656 int bond_create(struct net *net, const char *name); 657 int bond_create_sysfs(struct bond_net *net); 658 void bond_destroy_sysfs(struct bond_net *net); 659 void bond_prepare_sysfs_group(struct bonding *bond); 660 int bond_sysfs_slave_add(struct slave *slave); 661 void bond_sysfs_slave_del(struct slave *slave); 662 int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev, 663 struct netlink_ext_ack *extack); 664 int bond_release(struct net_device *bond_dev, struct net_device *slave_dev); 665 u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb); 666 int bond_set_carrier(struct bonding *bond); 667 void bond_select_active_slave(struct bonding *bond); 668 void bond_change_active_slave(struct bonding *bond, struct slave *new_active); 669 void bond_create_debugfs(void); 670 void bond_destroy_debugfs(void); 671 void bond_debug_register(struct bonding *bond); 672 void bond_debug_unregister(struct bonding *bond); 673 void bond_debug_reregister(struct bonding *bond); 674 const char *bond_mode_name(int mode); 675 void bond_setup(struct net_device *bond_dev); 676 unsigned int bond_get_num_tx_queues(void); 677 int bond_netlink_init(void); 678 void bond_netlink_fini(void); 679 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond); 680 const char *bond_slave_link_status(s8 link); 681 struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev, 682 struct net_device *end_dev, 683 int level); 684 int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave); 685 void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay); 686 void bond_work_init_all(struct bonding *bond); 687 688 #ifdef CONFIG_PROC_FS 689 void bond_create_proc_entry(struct bonding *bond); 690 void bond_remove_proc_entry(struct bonding *bond); 691 void bond_create_proc_dir(struct bond_net *bn); 692 void bond_destroy_proc_dir(struct bond_net *bn); 693 #else 694 static inline void bond_create_proc_entry(struct bonding *bond) 695 { 696 } 697 698 static inline void bond_remove_proc_entry(struct bonding *bond) 699 { 700 } 701 702 static inline void bond_create_proc_dir(struct bond_net *bn) 703 { 704 } 705 706 static inline void bond_destroy_proc_dir(struct bond_net *bn) 707 { 708 } 709 #endif 710 711 static inline struct slave *bond_slave_has_mac(struct bonding *bond, 712 const u8 *mac) 713 { 714 struct list_head *iter; 715 struct slave *tmp; 716 717 bond_for_each_slave(bond, tmp, iter) 718 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr)) 719 return tmp; 720 721 return NULL; 722 } 723 724 /* Caller must hold rcu_read_lock() for read */ 725 static inline bool bond_slave_has_mac_rx(struct bonding *bond, const u8 *mac) 726 { 727 struct list_head *iter; 728 struct slave *tmp; 729 struct netdev_hw_addr *ha; 730 731 bond_for_each_slave_rcu(bond, tmp, iter) 732 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr)) 733 return true; 734 735 if (netdev_uc_empty(bond->dev)) 736 return false; 737 738 netdev_for_each_uc_addr(ha, bond->dev) 739 if (ether_addr_equal_64bits(mac, ha->addr)) 740 return true; 741 742 return false; 743 } 744 745 /* Check if the ip is present in arp ip list, or first free slot if ip == 0 746 * Returns -1 if not found, index if found 747 */ 748 static inline int bond_get_targets_ip(__be32 *targets, __be32 ip) 749 { 750 int i; 751 752 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) 753 if (targets[i] == ip) 754 return i; 755 else if (targets[i] == 0) 756 break; 757 758 return -1; 759 } 760 761 #if IS_ENABLED(CONFIG_IPV6) 762 static inline int bond_get_targets_ip6(struct in6_addr *targets, struct in6_addr *ip) 763 { 764 int i; 765 766 for (i = 0; i < BOND_MAX_NS_TARGETS; i++) 767 if (ipv6_addr_equal(&targets[i], ip)) 768 return i; 769 else if (ipv6_addr_any(&targets[i])) 770 break; 771 772 return -1; 773 } 774 #endif 775 776 /* exported from bond_main.c */ 777 extern unsigned int bond_net_id; 778 779 /* exported from bond_netlink.c */ 780 extern struct rtnl_link_ops bond_link_ops; 781 782 /* exported from bond_sysfs_slave.c */ 783 extern const struct sysfs_ops slave_sysfs_ops; 784 785 /* exported from bond_3ad.c */ 786 extern const u8 lacpdu_mcast_addr[]; 787 788 static inline netdev_tx_t bond_tx_drop(struct net_device *dev, struct sk_buff *skb) 789 { 790 dev_core_stats_tx_dropped_inc(dev); 791 dev_kfree_skb_any(skb); 792 return NET_XMIT_DROP; 793 } 794 795 #endif /* _NET_BONDING_H */ 796