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 94 extern atomic_t netpoll_block_tx; 95 96 static inline void block_netpoll_tx(void) 97 { 98 atomic_inc(&netpoll_block_tx); 99 } 100 101 static inline void unblock_netpoll_tx(void) 102 { 103 atomic_dec(&netpoll_block_tx); 104 } 105 106 static 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 117 118 DECLARE_STATIC_KEY_FALSE(bond_bcast_neigh_enabled); 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 fail_over_mac; 130 int updelay; 131 int downdelay; 132 int peer_notif_delay; 133 int lacp_active; 134 int lacp_fast; 135 unsigned int min_links; 136 int ad_select; 137 char primary[IFNAMSIZ]; 138 int primary_reselect; 139 __be32 arp_targets[BOND_MAX_ARP_TARGETS]; 140 int tx_queues; 141 int all_slaves_active; 142 int resend_igmp; 143 int lp_interval; 144 int packets_per_slave; 145 int tlb_dynamic_lb; 146 struct reciprocal_value reciprocal_packets_per_slave; 147 u16 ad_actor_sys_prio; 148 u16 ad_user_port_key; 149 #if IS_ENABLED(CONFIG_IPV6) 150 struct in6_addr ns_targets[BOND_MAX_NS_TARGETS]; 151 #endif 152 int coupled_control; 153 int broadcast_neighbor; 154 155 /* 2 bytes of padding : see ether_addr_equal_64bits() */ 156 u8 ad_actor_system[ETH_ALEN + 2]; 157 }; 158 159 struct slave { 160 struct net_device *dev; /* first - useful for panic debug */ 161 struct bonding *bond; /* our master */ 162 int delay; 163 /* all 4 in jiffies */ 164 unsigned long last_link_up; 165 unsigned long last_tx; 166 unsigned long last_rx; 167 unsigned long target_last_arp_rx[BOND_MAX_ARP_TARGETS]; 168 s8 link; /* one of BOND_LINK_XXXX */ 169 s8 link_new_state; /* one of BOND_LINK_XXXX */ 170 u8 backup:1, /* indicates backup slave. Value corresponds with 171 BOND_STATE_ACTIVE and BOND_STATE_BACKUP */ 172 inactive:1, /* indicates inactive slave */ 173 rx_disabled:1, /* indicates whether slave's Rx is disabled */ 174 should_notify:1, /* indicates whether the state changed */ 175 should_notify_link:1; /* indicates whether the link changed */ 176 u8 duplex; 177 u32 original_mtu; 178 u32 link_failure_count; 179 u32 speed; 180 u16 queue_id; 181 u8 perm_hwaddr[MAX_ADDR_LEN]; 182 int prio; 183 struct ad_slave_info *ad_info; 184 struct tlb_slave_info tlb_info; 185 #ifdef CONFIG_NET_POLL_CONTROLLER 186 struct netpoll *np; 187 #endif 188 struct delayed_work notify_work; 189 struct kobject kobj; 190 struct rtnl_link_stats64 slave_stats; 191 }; 192 193 static inline struct slave *to_slave(struct kobject *kobj) 194 { 195 return container_of(kobj, struct slave, kobj); 196 } 197 198 struct bond_up_slave { 199 unsigned int count; 200 struct rcu_head rcu; 201 struct slave *arr[]; 202 }; 203 204 /* 205 * Link pseudo-state only used internally by monitors 206 */ 207 #define BOND_LINK_NOCHANGE -1 208 209 struct bond_ipsec { 210 struct list_head list; 211 struct xfrm_state *xs; 212 }; 213 214 /* 215 * Here are the locking policies for the two bonding locks: 216 * Get rcu_read_lock when reading or RTNL when writing slave list. 217 */ 218 struct bonding { 219 struct net_device *dev; /* first - useful for panic debug */ 220 struct slave __rcu *curr_active_slave; 221 struct slave __rcu *current_arp_slave; 222 struct slave __rcu *primary_slave; 223 struct bond_up_slave __rcu *usable_slaves; 224 struct bond_up_slave __rcu *all_slaves; 225 bool force_primary; 226 bool notifier_ctx; 227 s32 slave_cnt; /* never change this value outside the attach/detach wrappers */ 228 int (*recv_probe)(const struct sk_buff *, struct bonding *, 229 struct slave *); 230 /* mode_lock is used for mode-specific locking needs, currently used by: 231 * 3ad mode (4) - protect against running bond_3ad_unbind_slave() and 232 * bond_3ad_state_machine_handler() concurrently and also 233 * the access to the state machine shared variables. 234 * TLB mode (5) - to sync the use and modifications of its hash table 235 * ALB mode (6) - to sync the use and modifications of its hash table 236 */ 237 spinlock_t mode_lock; 238 spinlock_t stats_lock; 239 u32 send_peer_notif; 240 u8 igmp_retrans; 241 #ifdef CONFIG_PROC_FS 242 struct proc_dir_entry *proc_entry; 243 char proc_file_name[IFNAMSIZ]; 244 #endif /* CONFIG_PROC_FS */ 245 struct list_head bond_list; 246 u32 __percpu *rr_tx_counter; 247 struct ad_bond_info ad_info; 248 struct alb_bond_info alb_info; 249 struct bond_params params; 250 struct workqueue_struct *wq; 251 struct delayed_work mii_work; 252 struct delayed_work arp_work; 253 struct delayed_work alb_work; 254 struct delayed_work ad_work; 255 struct delayed_work mcast_work; 256 struct delayed_work slave_arr_work; 257 struct delayed_work peer_notify_work; 258 #ifdef CONFIG_DEBUG_FS 259 /* debugging support via debugfs */ 260 struct dentry *debug_dir; 261 #endif /* CONFIG_DEBUG_FS */ 262 struct rtnl_link_stats64 bond_stats; 263 #ifdef CONFIG_XFRM_OFFLOAD 264 struct list_head ipsec_list; 265 /* protecting ipsec_list */ 266 struct mutex ipsec_lock; 267 #endif /* CONFIG_XFRM_OFFLOAD */ 268 struct bpf_prog *xdp_prog; 269 }; 270 271 #define bond_slave_get_rcu(dev) \ 272 ((struct slave *) rcu_dereference(dev->rx_handler_data)) 273 274 #define bond_slave_get_rtnl(dev) \ 275 ((struct slave *) rtnl_dereference(dev->rx_handler_data)) 276 277 void bond_queue_slave_event(struct slave *slave); 278 void bond_lower_state_changed(struct slave *slave); 279 280 struct bond_vlan_tag { 281 __be16 vlan_proto; 282 unsigned short vlan_id; 283 }; 284 285 /* 286 * Returns NULL if the net_device does not belong to any of the bond's slaves 287 * 288 * Caller must hold bond lock for read 289 */ 290 static inline struct slave *bond_get_slave_by_dev(struct bonding *bond, 291 struct net_device *slave_dev) 292 { 293 return netdev_lower_dev_get_private(bond->dev, slave_dev); 294 } 295 296 static inline struct bonding *bond_get_bond_by_slave(struct slave *slave) 297 { 298 return slave->bond; 299 } 300 301 static inline bool bond_should_override_tx_queue(struct bonding *bond) 302 { 303 return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP || 304 BOND_MODE(bond) == BOND_MODE_ROUNDROBIN; 305 } 306 307 static inline bool bond_is_lb(const struct bonding *bond) 308 { 309 return BOND_MODE(bond) == BOND_MODE_TLB || 310 BOND_MODE(bond) == BOND_MODE_ALB; 311 } 312 313 static inline bool bond_needs_speed_duplex(const struct bonding *bond) 314 { 315 return BOND_MODE(bond) == BOND_MODE_8023AD || bond_is_lb(bond); 316 } 317 318 static inline bool bond_is_nondyn_tlb(const struct bonding *bond) 319 { 320 return (bond_is_lb(bond) && bond->params.tlb_dynamic_lb == 0); 321 } 322 323 static inline bool bond_mode_can_use_xmit_hash(const struct bonding *bond) 324 { 325 return (BOND_MODE(bond) == BOND_MODE_8023AD || 326 BOND_MODE(bond) == BOND_MODE_XOR || 327 BOND_MODE(bond) == BOND_MODE_TLB || 328 BOND_MODE(bond) == BOND_MODE_ALB); 329 } 330 331 static inline bool bond_mode_uses_xmit_hash(const struct bonding *bond) 332 { 333 return (BOND_MODE(bond) == BOND_MODE_8023AD || 334 BOND_MODE(bond) == BOND_MODE_XOR || 335 bond_is_nondyn_tlb(bond)); 336 } 337 338 static inline bool bond_mode_uses_arp(int mode) 339 { 340 return mode != BOND_MODE_8023AD && mode != BOND_MODE_TLB && 341 mode != BOND_MODE_ALB; 342 } 343 344 static inline bool bond_mode_uses_primary(int mode) 345 { 346 return mode == BOND_MODE_ACTIVEBACKUP || mode == BOND_MODE_TLB || 347 mode == BOND_MODE_ALB; 348 } 349 350 static inline bool bond_uses_primary(struct bonding *bond) 351 { 352 return bond_mode_uses_primary(BOND_MODE(bond)); 353 } 354 355 static inline struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond) 356 { 357 struct slave *slave = rcu_dereference_rtnl(bond->curr_active_slave); 358 359 return bond_uses_primary(bond) && slave ? slave->dev : NULL; 360 } 361 362 static inline bool bond_slave_is_up(struct slave *slave) 363 { 364 return netif_running(slave->dev) && netif_carrier_ok(slave->dev); 365 } 366 367 static inline void bond_set_active_slave(struct slave *slave) 368 { 369 if (slave->backup) { 370 slave->backup = 0; 371 bond_queue_slave_event(slave); 372 bond_lower_state_changed(slave); 373 } 374 } 375 376 static inline void bond_set_backup_slave(struct slave *slave) 377 { 378 if (!slave->backup) { 379 slave->backup = 1; 380 bond_queue_slave_event(slave); 381 bond_lower_state_changed(slave); 382 } 383 } 384 385 static inline void bond_set_slave_state(struct slave *slave, 386 int slave_state, bool notify) 387 { 388 if (slave->backup == slave_state) 389 return; 390 391 slave->backup = slave_state; 392 if (notify) { 393 bond_lower_state_changed(slave); 394 bond_queue_slave_event(slave); 395 slave->should_notify = 0; 396 } else { 397 if (slave->should_notify) 398 slave->should_notify = 0; 399 else 400 slave->should_notify = 1; 401 } 402 } 403 404 static inline void bond_slave_state_change(struct bonding *bond) 405 { 406 struct list_head *iter; 407 struct slave *tmp; 408 409 bond_for_each_slave(bond, tmp, iter) { 410 if (tmp->link == BOND_LINK_UP) 411 bond_set_active_slave(tmp); 412 else if (tmp->link == BOND_LINK_DOWN) 413 bond_set_backup_slave(tmp); 414 } 415 } 416 417 static inline void bond_slave_state_notify(struct bonding *bond) 418 { 419 struct list_head *iter; 420 struct slave *tmp; 421 422 bond_for_each_slave(bond, tmp, iter) { 423 if (tmp->should_notify) { 424 bond_lower_state_changed(tmp); 425 tmp->should_notify = 0; 426 } 427 } 428 } 429 430 static inline int bond_slave_state(struct slave *slave) 431 { 432 return slave->backup; 433 } 434 435 static inline bool bond_is_active_slave(struct slave *slave) 436 { 437 return !bond_slave_state(slave); 438 } 439 440 static inline bool bond_slave_can_tx(struct slave *slave) 441 { 442 return bond_slave_is_up(slave) && slave->link == BOND_LINK_UP && 443 bond_is_active_slave(slave); 444 } 445 446 static inline bool bond_is_active_slave_dev(const struct net_device *slave_dev) 447 { 448 struct slave *slave; 449 bool active; 450 451 rcu_read_lock(); 452 slave = bond_slave_get_rcu(slave_dev); 453 active = bond_is_active_slave(slave); 454 rcu_read_unlock(); 455 456 return active; 457 } 458 459 static inline void bond_hw_addr_copy(u8 *dst, const u8 *src, unsigned int len) 460 { 461 if (len == ETH_ALEN) { 462 ether_addr_copy(dst, src); 463 return; 464 } 465 466 memcpy(dst, src, len); 467 } 468 469 #define BOND_PRI_RESELECT_ALWAYS 0 470 #define BOND_PRI_RESELECT_BETTER 1 471 #define BOND_PRI_RESELECT_FAILURE 2 472 473 #define BOND_FOM_NONE 0 474 #define BOND_FOM_ACTIVE 1 475 #define BOND_FOM_FOLLOW 2 476 477 #define BOND_ARP_TARGETS_ANY 0 478 #define BOND_ARP_TARGETS_ALL 1 479 480 #define BOND_ARP_VALIDATE_NONE 0 481 #define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE) 482 #define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP) 483 #define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE | \ 484 BOND_ARP_VALIDATE_BACKUP) 485 #define BOND_ARP_FILTER (BOND_ARP_VALIDATE_ALL + 1) 486 #define BOND_ARP_FILTER_ACTIVE (BOND_ARP_VALIDATE_ACTIVE | \ 487 BOND_ARP_FILTER) 488 #define BOND_ARP_FILTER_BACKUP (BOND_ARP_VALIDATE_BACKUP | \ 489 BOND_ARP_FILTER) 490 491 #define BOND_SLAVE_NOTIFY_NOW true 492 #define BOND_SLAVE_NOTIFY_LATER false 493 494 static inline int slave_do_arp_validate(struct bonding *bond, 495 struct slave *slave) 496 { 497 return bond->params.arp_validate & (1 << bond_slave_state(slave)); 498 } 499 500 static inline int slave_do_arp_validate_only(struct bonding *bond) 501 { 502 return bond->params.arp_validate & BOND_ARP_FILTER; 503 } 504 505 static inline int bond_is_ip_target_ok(__be32 addr) 506 { 507 return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr); 508 } 509 510 #if IS_ENABLED(CONFIG_IPV6) 511 static inline int bond_is_ip6_target_ok(struct in6_addr *addr) 512 { 513 return !ipv6_addr_any(addr) && 514 !ipv6_addr_loopback(addr) && 515 !ipv6_addr_is_multicast(addr); 516 } 517 #endif 518 519 /* Get the oldest arp which we've received on this slave for bond's 520 * arp_targets. 521 */ 522 static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond, 523 struct slave *slave) 524 { 525 unsigned long tmp, ret = READ_ONCE(slave->target_last_arp_rx[0]); 526 int i = 1; 527 528 for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++) { 529 tmp = READ_ONCE(slave->target_last_arp_rx[i]); 530 if (time_before(tmp, ret)) 531 ret = tmp; 532 } 533 return ret; 534 } 535 536 static inline unsigned long slave_last_rx(struct bonding *bond, 537 struct slave *slave) 538 { 539 if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL) 540 return slave_oldest_target_arp_rx(bond, slave); 541 542 return READ_ONCE(slave->last_rx); 543 } 544 545 static inline void slave_update_last_tx(struct slave *slave) 546 { 547 WRITE_ONCE(slave->last_tx, jiffies); 548 } 549 550 static inline unsigned long slave_last_tx(struct slave *slave) 551 { 552 return READ_ONCE(slave->last_tx); 553 } 554 555 #ifdef CONFIG_NET_POLL_CONTROLLER 556 static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave, 557 struct sk_buff *skb) 558 { 559 return netpoll_send_skb(slave->np, skb); 560 } 561 #else 562 static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave, 563 struct sk_buff *skb) 564 { 565 BUG(); 566 return NETDEV_TX_OK; 567 } 568 #endif 569 570 static inline void bond_set_slave_inactive_flags(struct slave *slave, 571 bool notify) 572 { 573 if (!bond_is_lb(slave->bond)) 574 bond_set_slave_state(slave, BOND_STATE_BACKUP, notify); 575 if (!slave->bond->params.all_slaves_active) 576 slave->inactive = 1; 577 if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) 578 slave->rx_disabled = 1; 579 } 580 581 static inline void bond_set_slave_tx_disabled_flags(struct slave *slave, 582 bool notify) 583 { 584 bond_set_slave_state(slave, BOND_STATE_BACKUP, notify); 585 } 586 587 static inline void bond_set_slave_active_flags(struct slave *slave, 588 bool notify) 589 { 590 bond_set_slave_state(slave, BOND_STATE_ACTIVE, notify); 591 slave->inactive = 0; 592 if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) 593 slave->rx_disabled = 0; 594 } 595 596 static inline void bond_set_slave_rx_enabled_flags(struct slave *slave, 597 bool notify) 598 { 599 slave->rx_disabled = 0; 600 } 601 602 static inline bool bond_is_slave_inactive(struct slave *slave) 603 { 604 return slave->inactive; 605 } 606 607 static inline bool bond_is_slave_rx_disabled(struct slave *slave) 608 { 609 return slave->rx_disabled; 610 } 611 612 static inline void bond_propose_link_state(struct slave *slave, int state) 613 { 614 slave->link_new_state = state; 615 } 616 617 static inline void bond_commit_link_state(struct slave *slave, bool notify) 618 { 619 if (slave->link_new_state == BOND_LINK_NOCHANGE) 620 return; 621 622 slave->link = slave->link_new_state; 623 if (notify) { 624 bond_queue_slave_event(slave); 625 bond_lower_state_changed(slave); 626 slave->should_notify_link = 0; 627 } else { 628 if (slave->should_notify_link) 629 slave->should_notify_link = 0; 630 else 631 slave->should_notify_link = 1; 632 } 633 } 634 635 static inline void bond_set_slave_link_state(struct slave *slave, int state, 636 bool notify) 637 { 638 bond_propose_link_state(slave, state); 639 bond_commit_link_state(slave, notify); 640 } 641 642 static inline void bond_slave_link_notify(struct bonding *bond) 643 { 644 struct list_head *iter; 645 struct slave *tmp; 646 647 bond_for_each_slave(bond, tmp, iter) { 648 if (tmp->should_notify_link) { 649 bond_queue_slave_event(tmp); 650 bond_lower_state_changed(tmp); 651 tmp->should_notify_link = 0; 652 } 653 } 654 } 655 656 static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local) 657 { 658 struct in_device *in_dev; 659 __be32 addr = 0; 660 661 rcu_read_lock(); 662 in_dev = __in_dev_get_rcu(dev); 663 664 if (in_dev) 665 addr = inet_confirm_addr(dev_net(dev), in_dev, dst, local, 666 RT_SCOPE_HOST); 667 rcu_read_unlock(); 668 return addr; 669 } 670 671 struct bond_net { 672 struct net *net; /* Associated network namespace */ 673 struct list_head dev_list; 674 #ifdef CONFIG_PROC_FS 675 struct proc_dir_entry *proc_dir; 676 #endif 677 struct class_attribute class_attr_bonding_masters; 678 }; 679 680 int bond_rcv_validate(const struct sk_buff *skb, struct bonding *bond, struct slave *slave); 681 netdev_tx_t bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev); 682 int bond_create(struct net *net, const char *name); 683 int bond_create_sysfs(struct bond_net *net); 684 void bond_destroy_sysfs(struct bond_net *net); 685 void bond_prepare_sysfs_group(struct bonding *bond); 686 int bond_sysfs_slave_add(struct slave *slave); 687 void bond_sysfs_slave_del(struct slave *slave); 688 void bond_xdp_set_features(struct net_device *bond_dev); 689 int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev, 690 struct netlink_ext_ack *extack); 691 int bond_release(struct net_device *bond_dev, struct net_device *slave_dev); 692 u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb); 693 int bond_set_carrier(struct bonding *bond); 694 void bond_select_active_slave(struct bonding *bond); 695 void bond_change_active_slave(struct bonding *bond, struct slave *new_active); 696 void bond_create_debugfs(void); 697 void bond_destroy_debugfs(void); 698 void bond_debug_register(struct bonding *bond); 699 void bond_debug_unregister(struct bonding *bond); 700 void bond_debug_reregister(struct bonding *bond); 701 const char *bond_mode_name(int mode); 702 bool bond_xdp_check(struct bonding *bond, int mode); 703 void bond_setup(struct net_device *bond_dev); 704 unsigned int bond_get_num_tx_queues(void); 705 int bond_netlink_init(void); 706 void bond_netlink_fini(void); 707 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond); 708 const char *bond_slave_link_status(s8 link); 709 struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev, 710 struct net_device *end_dev, 711 int level); 712 int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave); 713 void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay); 714 void bond_peer_notify_work_rearm(struct bonding *bond, unsigned long delay); 715 void bond_work_init_all(struct bonding *bond); 716 void bond_work_cancel_all(struct bonding *bond); 717 718 #ifdef CONFIG_PROC_FS 719 void bond_create_proc_entry(struct bonding *bond); 720 void bond_remove_proc_entry(struct bonding *bond); 721 void bond_create_proc_dir(struct bond_net *bn); 722 void bond_destroy_proc_dir(struct bond_net *bn); 723 #else 724 static inline void bond_create_proc_entry(struct bonding *bond) 725 { 726 } 727 728 static inline void bond_remove_proc_entry(struct bonding *bond) 729 { 730 } 731 732 static inline void bond_create_proc_dir(struct bond_net *bn) 733 { 734 } 735 736 static inline void bond_destroy_proc_dir(struct bond_net *bn) 737 { 738 } 739 #endif 740 741 static inline struct slave *bond_slave_has_mac(struct bonding *bond, 742 const u8 *mac) 743 { 744 struct list_head *iter; 745 struct slave *tmp; 746 747 bond_for_each_slave(bond, tmp, iter) 748 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr)) 749 return tmp; 750 751 return NULL; 752 } 753 754 /* Caller must hold rcu_read_lock() for read */ 755 static inline bool bond_slave_has_mac_rcu(struct bonding *bond, const u8 *mac) 756 { 757 struct list_head *iter; 758 struct slave *tmp; 759 760 bond_for_each_slave_rcu(bond, tmp, iter) 761 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr)) 762 return true; 763 return false; 764 } 765 766 /* Check if the ip is present in arp ip list, or first free slot if ip == 0 767 * Returns -1 if not found, index if found 768 */ 769 static inline int bond_get_targets_ip(__be32 *targets, __be32 ip) 770 { 771 int i; 772 773 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) 774 if (targets[i] == ip) 775 return i; 776 else if (targets[i] == 0) 777 break; 778 779 return -1; 780 } 781 782 #if IS_ENABLED(CONFIG_IPV6) 783 static inline int bond_get_targets_ip6(struct in6_addr *targets, struct in6_addr *ip) 784 { 785 struct in6_addr mcaddr; 786 int i; 787 788 for (i = 0; i < BOND_MAX_NS_TARGETS; i++) { 789 addrconf_addr_solict_mult(&targets[i], &mcaddr); 790 if ((ipv6_addr_equal(&targets[i], ip)) || 791 (ipv6_addr_equal(&mcaddr, ip))) 792 return i; 793 else if (ipv6_addr_any(&targets[i])) 794 break; 795 } 796 797 return -1; 798 } 799 #endif 800 801 /* exported from bond_main.c */ 802 extern unsigned int bond_net_id; 803 804 /* exported from bond_netlink.c */ 805 extern struct rtnl_link_ops bond_link_ops; 806 807 /* exported from bond_sysfs_slave.c */ 808 extern const struct sysfs_ops slave_sysfs_ops; 809 810 /* exported from bond_3ad.c */ 811 extern const u8 lacpdu_mcast_addr[]; 812 813 static inline netdev_tx_t bond_tx_drop(struct net_device *dev, struct sk_buff *skb) 814 { 815 dev_core_stats_tx_dropped_inc(dev); 816 dev_kfree_skb_any(skb); 817 return NET_XMIT_DROP; 818 } 819 820 #endif /* _NET_BONDING_H */ 821