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