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 #define BOND_TLS_FEATURES (NETIF_F_HW_TLS_TX | NETIF_F_HW_TLS_RX) 96 97 #ifdef CONFIG_NET_POLL_CONTROLLER 98 extern atomic_t netpoll_block_tx; 99 100 static inline void block_netpoll_tx(void) 101 { 102 atomic_inc(&netpoll_block_tx); 103 } 104 105 static inline void unblock_netpoll_tx(void) 106 { 107 atomic_dec(&netpoll_block_tx); 108 } 109 110 static inline int is_netpoll_tx_blocked(struct net_device *dev) 111 { 112 if (unlikely(netpoll_tx_running(dev))) 113 return atomic_read(&netpoll_block_tx); 114 return 0; 115 } 116 #else 117 #define block_netpoll_tx() 118 #define unblock_netpoll_tx() 119 #define is_netpoll_tx_blocked(dev) (0) 120 #endif 121 122 struct bond_params { 123 int mode; 124 int xmit_policy; 125 int miimon; 126 u8 num_peer_notif; 127 u8 missed_max; 128 int arp_interval; 129 int arp_validate; 130 int arp_all_targets; 131 int use_carrier; 132 int fail_over_mac; 133 int updelay; 134 int downdelay; 135 int peer_notif_delay; 136 int lacp_active; 137 int lacp_fast; 138 unsigned int min_links; 139 int ad_select; 140 char primary[IFNAMSIZ]; 141 int primary_reselect; 142 __be32 arp_targets[BOND_MAX_ARP_TARGETS]; 143 int tx_queues; 144 int all_slaves_active; 145 int resend_igmp; 146 int lp_interval; 147 int packets_per_slave; 148 int tlb_dynamic_lb; 149 struct reciprocal_value reciprocal_packets_per_slave; 150 u16 ad_actor_sys_prio; 151 u16 ad_user_port_key; 152 #if IS_ENABLED(CONFIG_IPV6) 153 struct in6_addr ns_targets[BOND_MAX_NS_TARGETS]; 154 #endif 155 156 /* 2 bytes of padding : see ether_addr_equal_64bits() */ 157 u8 ad_actor_system[ETH_ALEN + 2]; 158 }; 159 160 struct slave { 161 struct net_device *dev; /* first - useful for panic debug */ 162 struct bonding *bond; /* our master */ 163 int delay; 164 /* all three in jiffies */ 165 unsigned long last_link_up; 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 should_notify:1, /* indicates whether the state changed */ 174 should_notify_link:1; /* indicates whether the link changed */ 175 u8 duplex; 176 u32 original_mtu; 177 u32 link_failure_count; 178 u32 speed; 179 u16 queue_id; 180 u8 perm_hwaddr[MAX_ADDR_LEN]; 181 int prio; 182 struct ad_slave_info *ad_info; 183 struct tlb_slave_info tlb_info; 184 #ifdef CONFIG_NET_POLL_CONTROLLER 185 struct netpoll *np; 186 #endif 187 struct delayed_work notify_work; 188 struct kobject kobj; 189 struct rtnl_link_stats64 slave_stats; 190 }; 191 192 static inline struct slave *to_slave(struct kobject *kobj) 193 { 194 return container_of(kobj, struct slave, kobj); 195 } 196 197 struct bond_up_slave { 198 unsigned int count; 199 struct rcu_head rcu; 200 struct slave *arr[]; 201 }; 202 203 /* 204 * Link pseudo-state only used internally by monitors 205 */ 206 #define BOND_LINK_NOCHANGE -1 207 208 struct bond_ipsec { 209 struct list_head list; 210 struct xfrm_state *xs; 211 }; 212 213 /* 214 * Here are the locking policies for the two bonding locks: 215 * Get rcu_read_lock when reading or RTNL when writing slave list. 216 */ 217 struct bonding { 218 struct net_device *dev; /* first - useful for panic debug */ 219 struct slave __rcu *curr_active_slave; 220 struct slave __rcu *current_arp_slave; 221 struct slave __rcu *primary_slave; 222 struct bond_up_slave __rcu *usable_slaves; 223 struct bond_up_slave __rcu *all_slaves; 224 bool force_primary; 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 u8 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)) 273 274 void bond_queue_slave_event(struct slave *slave); 275 void bond_lower_state_changed(struct slave *slave); 276 277 struct bond_vlan_tag { 278 __be16 vlan_proto; 279 unsigned short vlan_id; 280 }; 281 282 bool bond_sk_check(struct bonding *bond); 283 284 /** 285 * Returns NULL if the net_device does not belong to any of the bond's slaves 286 * 287 * Caller must hold bond lock for read 288 */ 289 static inline struct slave *bond_get_slave_by_dev(struct bonding *bond, 290 struct net_device *slave_dev) 291 { 292 return netdev_lower_dev_get_private(bond->dev, slave_dev); 293 } 294 295 static inline struct bonding *bond_get_bond_by_slave(struct slave *slave) 296 { 297 return slave->bond; 298 } 299 300 static inline bool bond_should_override_tx_queue(struct bonding *bond) 301 { 302 return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP || 303 BOND_MODE(bond) == BOND_MODE_ROUNDROBIN; 304 } 305 306 static inline bool bond_is_lb(const struct bonding *bond) 307 { 308 return BOND_MODE(bond) == BOND_MODE_TLB || 309 BOND_MODE(bond) == BOND_MODE_ALB; 310 } 311 312 static inline bool bond_needs_speed_duplex(const struct bonding *bond) 313 { 314 return BOND_MODE(bond) == BOND_MODE_8023AD || bond_is_lb(bond); 315 } 316 317 static inline bool bond_is_nondyn_tlb(const struct bonding *bond) 318 { 319 return (bond_is_lb(bond) && bond->params.tlb_dynamic_lb == 0); 320 } 321 322 static inline bool bond_mode_can_use_xmit_hash(const struct bonding *bond) 323 { 324 return (BOND_MODE(bond) == BOND_MODE_8023AD || 325 BOND_MODE(bond) == BOND_MODE_XOR || 326 BOND_MODE(bond) == BOND_MODE_TLB || 327 BOND_MODE(bond) == BOND_MODE_ALB); 328 } 329 330 static inline bool bond_mode_uses_xmit_hash(const struct bonding *bond) 331 { 332 return (BOND_MODE(bond) == BOND_MODE_8023AD || 333 BOND_MODE(bond) == BOND_MODE_XOR || 334 bond_is_nondyn_tlb(bond)); 335 } 336 337 static inline bool bond_mode_uses_arp(int mode) 338 { 339 return mode != BOND_MODE_8023AD && mode != BOND_MODE_TLB && 340 mode != BOND_MODE_ALB; 341 } 342 343 static inline bool bond_mode_uses_primary(int mode) 344 { 345 return mode == BOND_MODE_ACTIVEBACKUP || mode == BOND_MODE_TLB || 346 mode == BOND_MODE_ALB; 347 } 348 349 static inline bool bond_uses_primary(struct bonding *bond) 350 { 351 return bond_mode_uses_primary(BOND_MODE(bond)); 352 } 353 354 static inline struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond) 355 { 356 struct slave *slave = rcu_dereference_rtnl(bond->curr_active_slave); 357 358 return bond_uses_primary(bond) && slave ? slave->dev : NULL; 359 } 360 361 static inline bool bond_slave_is_up(struct slave *slave) 362 { 363 return netif_running(slave->dev) && netif_carrier_ok(slave->dev); 364 } 365 366 static inline void bond_set_active_slave(struct slave *slave) 367 { 368 if (slave->backup) { 369 slave->backup = 0; 370 bond_queue_slave_event(slave); 371 bond_lower_state_changed(slave); 372 } 373 } 374 375 static inline void bond_set_backup_slave(struct slave *slave) 376 { 377 if (!slave->backup) { 378 slave->backup = 1; 379 bond_queue_slave_event(slave); 380 bond_lower_state_changed(slave); 381 } 382 } 383 384 static inline void bond_set_slave_state(struct slave *slave, 385 int slave_state, bool notify) 386 { 387 if (slave->backup == slave_state) 388 return; 389 390 slave->backup = slave_state; 391 if (notify) { 392 bond_lower_state_changed(slave); 393 bond_queue_slave_event(slave); 394 slave->should_notify = 0; 395 } else { 396 if (slave->should_notify) 397 slave->should_notify = 0; 398 else 399 slave->should_notify = 1; 400 } 401 } 402 403 static inline void bond_slave_state_change(struct bonding *bond) 404 { 405 struct list_head *iter; 406 struct slave *tmp; 407 408 bond_for_each_slave(bond, tmp, iter) { 409 if (tmp->link == BOND_LINK_UP) 410 bond_set_active_slave(tmp); 411 else if (tmp->link == BOND_LINK_DOWN) 412 bond_set_backup_slave(tmp); 413 } 414 } 415 416 static inline void bond_slave_state_notify(struct bonding *bond) 417 { 418 struct list_head *iter; 419 struct slave *tmp; 420 421 bond_for_each_slave(bond, tmp, iter) { 422 if (tmp->should_notify) { 423 bond_lower_state_changed(tmp); 424 tmp->should_notify = 0; 425 } 426 } 427 } 428 429 static inline int bond_slave_state(struct slave *slave) 430 { 431 return slave->backup; 432 } 433 434 static inline bool bond_is_active_slave(struct slave *slave) 435 { 436 return !bond_slave_state(slave); 437 } 438 439 static inline bool bond_slave_can_tx(struct slave *slave) 440 { 441 return bond_slave_is_up(slave) && slave->link == BOND_LINK_UP && 442 bond_is_active_slave(slave); 443 } 444 445 static inline bool bond_is_active_slave_dev(const struct net_device *slave_dev) 446 { 447 struct slave *slave; 448 bool active; 449 450 rcu_read_lock(); 451 slave = bond_slave_get_rcu(slave_dev); 452 active = bond_is_active_slave(slave); 453 rcu_read_unlock(); 454 455 return active; 456 } 457 458 static inline void bond_hw_addr_copy(u8 *dst, const u8 *src, unsigned int len) 459 { 460 if (len == ETH_ALEN) { 461 ether_addr_copy(dst, src); 462 return; 463 } 464 465 memcpy(dst, src, len); 466 } 467 468 #define BOND_PRI_RESELECT_ALWAYS 0 469 #define BOND_PRI_RESELECT_BETTER 1 470 #define BOND_PRI_RESELECT_FAILURE 2 471 472 #define BOND_FOM_NONE 0 473 #define BOND_FOM_ACTIVE 1 474 #define BOND_FOM_FOLLOW 2 475 476 #define BOND_ARP_TARGETS_ANY 0 477 #define BOND_ARP_TARGETS_ALL 1 478 479 #define BOND_ARP_VALIDATE_NONE 0 480 #define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE) 481 #define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP) 482 #define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE | \ 483 BOND_ARP_VALIDATE_BACKUP) 484 #define BOND_ARP_FILTER (BOND_ARP_VALIDATE_ALL + 1) 485 #define BOND_ARP_FILTER_ACTIVE (BOND_ARP_VALIDATE_ACTIVE | \ 486 BOND_ARP_FILTER) 487 #define BOND_ARP_FILTER_BACKUP (BOND_ARP_VALIDATE_BACKUP | \ 488 BOND_ARP_FILTER) 489 490 #define BOND_SLAVE_NOTIFY_NOW true 491 #define BOND_SLAVE_NOTIFY_LATER false 492 493 static inline int slave_do_arp_validate(struct bonding *bond, 494 struct slave *slave) 495 { 496 return bond->params.arp_validate & (1 << bond_slave_state(slave)); 497 } 498 499 static inline int slave_do_arp_validate_only(struct bonding *bond) 500 { 501 return bond->params.arp_validate & BOND_ARP_FILTER; 502 } 503 504 static inline int bond_is_ip_target_ok(__be32 addr) 505 { 506 return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr); 507 } 508 509 #if IS_ENABLED(CONFIG_IPV6) 510 static inline int bond_is_ip6_target_ok(struct in6_addr *addr) 511 { 512 return !ipv6_addr_any(addr) && 513 !ipv6_addr_loopback(addr) && 514 !ipv6_addr_is_multicast(addr); 515 } 516 #endif 517 518 /* Get the oldest arp which we've received on this slave for bond's 519 * arp_targets. 520 */ 521 static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond, 522 struct slave *slave) 523 { 524 int i = 1; 525 unsigned long ret = slave->target_last_arp_rx[0]; 526 527 for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++) 528 if (time_before(slave->target_last_arp_rx[i], ret)) 529 ret = slave->target_last_arp_rx[i]; 530 531 return ret; 532 } 533 534 static inline unsigned long slave_last_rx(struct bonding *bond, 535 struct slave *slave) 536 { 537 if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL) 538 return slave_oldest_target_arp_rx(bond, slave); 539 540 return slave->last_rx; 541 } 542 543 #ifdef CONFIG_NET_POLL_CONTROLLER 544 static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave, 545 struct sk_buff *skb) 546 { 547 return netpoll_send_skb(slave->np, skb); 548 } 549 #else 550 static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave, 551 struct sk_buff *skb) 552 { 553 BUG(); 554 return NETDEV_TX_OK; 555 } 556 #endif 557 558 static inline void bond_set_slave_inactive_flags(struct slave *slave, 559 bool notify) 560 { 561 if (!bond_is_lb(slave->bond)) 562 bond_set_slave_state(slave, BOND_STATE_BACKUP, notify); 563 if (!slave->bond->params.all_slaves_active) 564 slave->inactive = 1; 565 } 566 567 static inline void bond_set_slave_active_flags(struct slave *slave, 568 bool notify) 569 { 570 bond_set_slave_state(slave, BOND_STATE_ACTIVE, notify); 571 slave->inactive = 0; 572 } 573 574 static inline bool bond_is_slave_inactive(struct slave *slave) 575 { 576 return slave->inactive; 577 } 578 579 static inline void bond_propose_link_state(struct slave *slave, int state) 580 { 581 slave->link_new_state = state; 582 } 583 584 static inline void bond_commit_link_state(struct slave *slave, bool notify) 585 { 586 if (slave->link_new_state == BOND_LINK_NOCHANGE) 587 return; 588 589 slave->link = slave->link_new_state; 590 if (notify) { 591 bond_queue_slave_event(slave); 592 bond_lower_state_changed(slave); 593 slave->should_notify_link = 0; 594 } else { 595 if (slave->should_notify_link) 596 slave->should_notify_link = 0; 597 else 598 slave->should_notify_link = 1; 599 } 600 } 601 602 static inline void bond_set_slave_link_state(struct slave *slave, int state, 603 bool notify) 604 { 605 bond_propose_link_state(slave, state); 606 bond_commit_link_state(slave, notify); 607 } 608 609 static inline void bond_slave_link_notify(struct bonding *bond) 610 { 611 struct list_head *iter; 612 struct slave *tmp; 613 614 bond_for_each_slave(bond, tmp, iter) { 615 if (tmp->should_notify_link) { 616 bond_queue_slave_event(tmp); 617 bond_lower_state_changed(tmp); 618 tmp->should_notify_link = 0; 619 } 620 } 621 } 622 623 static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local) 624 { 625 struct in_device *in_dev; 626 __be32 addr = 0; 627 628 rcu_read_lock(); 629 in_dev = __in_dev_get_rcu(dev); 630 631 if (in_dev) 632 addr = inet_confirm_addr(dev_net(dev), in_dev, dst, local, 633 RT_SCOPE_HOST); 634 rcu_read_unlock(); 635 return addr; 636 } 637 638 struct bond_net { 639 struct net *net; /* Associated network namespace */ 640 struct list_head dev_list; 641 #ifdef CONFIG_PROC_FS 642 struct proc_dir_entry *proc_dir; 643 #endif 644 struct class_attribute class_attr_bonding_masters; 645 }; 646 647 int bond_rcv_validate(const struct sk_buff *skb, struct bonding *bond, struct slave *slave); 648 netdev_tx_t bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev); 649 int bond_create(struct net *net, const char *name); 650 int bond_create_sysfs(struct bond_net *net); 651 void bond_destroy_sysfs(struct bond_net *net); 652 void bond_prepare_sysfs_group(struct bonding *bond); 653 int bond_sysfs_slave_add(struct slave *slave); 654 void bond_sysfs_slave_del(struct slave *slave); 655 int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev, 656 struct netlink_ext_ack *extack); 657 int bond_release(struct net_device *bond_dev, struct net_device *slave_dev); 658 u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb); 659 int bond_set_carrier(struct bonding *bond); 660 void bond_select_active_slave(struct bonding *bond); 661 void bond_change_active_slave(struct bonding *bond, struct slave *new_active); 662 void bond_create_debugfs(void); 663 void bond_destroy_debugfs(void); 664 void bond_debug_register(struct bonding *bond); 665 void bond_debug_unregister(struct bonding *bond); 666 void bond_debug_reregister(struct bonding *bond); 667 const char *bond_mode_name(int mode); 668 void bond_setup(struct net_device *bond_dev); 669 unsigned int bond_get_num_tx_queues(void); 670 int bond_netlink_init(void); 671 void bond_netlink_fini(void); 672 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond); 673 const char *bond_slave_link_status(s8 link); 674 struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev, 675 struct net_device *end_dev, 676 int level); 677 int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave); 678 void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay); 679 void bond_work_init_all(struct bonding *bond); 680 681 #ifdef CONFIG_PROC_FS 682 void bond_create_proc_entry(struct bonding *bond); 683 void bond_remove_proc_entry(struct bonding *bond); 684 void bond_create_proc_dir(struct bond_net *bn); 685 void bond_destroy_proc_dir(struct bond_net *bn); 686 #else 687 static inline void bond_create_proc_entry(struct bonding *bond) 688 { 689 } 690 691 static inline void bond_remove_proc_entry(struct bonding *bond) 692 { 693 } 694 695 static inline void bond_create_proc_dir(struct bond_net *bn) 696 { 697 } 698 699 static inline void bond_destroy_proc_dir(struct bond_net *bn) 700 { 701 } 702 #endif 703 704 static inline struct slave *bond_slave_has_mac(struct bonding *bond, 705 const u8 *mac) 706 { 707 struct list_head *iter; 708 struct slave *tmp; 709 710 bond_for_each_slave(bond, tmp, iter) 711 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr)) 712 return tmp; 713 714 return NULL; 715 } 716 717 /* Caller must hold rcu_read_lock() for read */ 718 static inline bool bond_slave_has_mac_rx(struct bonding *bond, const u8 *mac) 719 { 720 struct list_head *iter; 721 struct slave *tmp; 722 struct netdev_hw_addr *ha; 723 724 bond_for_each_slave_rcu(bond, tmp, iter) 725 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr)) 726 return true; 727 728 if (netdev_uc_empty(bond->dev)) 729 return false; 730 731 netdev_for_each_uc_addr(ha, bond->dev) 732 if (ether_addr_equal_64bits(mac, ha->addr)) 733 return true; 734 735 return false; 736 } 737 738 /* Check if the ip is present in arp ip list, or first free slot if ip == 0 739 * Returns -1 if not found, index if found 740 */ 741 static inline int bond_get_targets_ip(__be32 *targets, __be32 ip) 742 { 743 int i; 744 745 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) 746 if (targets[i] == ip) 747 return i; 748 else if (targets[i] == 0) 749 break; 750 751 return -1; 752 } 753 754 #if IS_ENABLED(CONFIG_IPV6) 755 static inline int bond_get_targets_ip6(struct in6_addr *targets, struct in6_addr *ip) 756 { 757 int i; 758 759 for (i = 0; i < BOND_MAX_NS_TARGETS; i++) 760 if (ipv6_addr_equal(&targets[i], ip)) 761 return i; 762 else if (ipv6_addr_any(&targets[i])) 763 break; 764 765 return -1; 766 } 767 #endif 768 769 /* exported from bond_main.c */ 770 extern unsigned int bond_net_id; 771 772 /* exported from bond_netlink.c */ 773 extern struct rtnl_link_ops bond_link_ops; 774 775 /* exported from bond_sysfs_slave.c */ 776 extern const struct sysfs_ops slave_sysfs_ops; 777 778 static inline netdev_tx_t bond_tx_drop(struct net_device *dev, struct sk_buff *skb) 779 { 780 dev_core_stats_tx_dropped_inc(dev); 781 dev_kfree_skb_any(skb); 782 return NET_XMIT_DROP; 783 } 784 785 #endif /* _NET_BONDING_H */ 786