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 33 #define BOND_MAX_ARP_TARGETS 16 34 35 #define BOND_DEFAULT_MIIMON 100 36 37 #ifndef __long_aligned 38 #define __long_aligned __attribute__((aligned((sizeof(long))))) 39 #endif 40 41 #define slave_info(bond_dev, slave_dev, fmt, ...) \ 42 netdev_info(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__) 43 #define slave_warn(bond_dev, slave_dev, fmt, ...) \ 44 netdev_warn(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__) 45 #define slave_dbg(bond_dev, slave_dev, fmt, ...) \ 46 netdev_dbg(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__) 47 #define slave_err(bond_dev, slave_dev, fmt, ...) \ 48 netdev_err(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__) 49 50 #define BOND_MODE(bond) ((bond)->params.mode) 51 52 /* slave list primitives */ 53 #define bond_slave_list(bond) (&(bond)->dev->adj_list.lower) 54 55 #define bond_has_slaves(bond) !list_empty(bond_slave_list(bond)) 56 57 /* IMPORTANT: bond_first/last_slave can return NULL in case of an empty list */ 58 #define bond_first_slave(bond) \ 59 (bond_has_slaves(bond) ? \ 60 netdev_adjacent_get_private(bond_slave_list(bond)->next) : \ 61 NULL) 62 #define bond_last_slave(bond) \ 63 (bond_has_slaves(bond) ? \ 64 netdev_adjacent_get_private(bond_slave_list(bond)->prev) : \ 65 NULL) 66 67 /* Caller must have rcu_read_lock */ 68 #define bond_first_slave_rcu(bond) \ 69 netdev_lower_get_first_private_rcu(bond->dev) 70 71 #define bond_is_first_slave(bond, pos) (pos == bond_first_slave(bond)) 72 #define bond_is_last_slave(bond, pos) (pos == bond_last_slave(bond)) 73 74 /** 75 * bond_for_each_slave - iterate over all slaves 76 * @bond: the bond holding this list 77 * @pos: current slave 78 * @iter: list_head * iterator 79 * 80 * Caller must hold RTNL 81 */ 82 #define bond_for_each_slave(bond, pos, iter) \ 83 netdev_for_each_lower_private((bond)->dev, pos, iter) 84 85 /* Caller must have rcu_read_lock */ 86 #define bond_for_each_slave_rcu(bond, pos, iter) \ 87 netdev_for_each_lower_private_rcu((bond)->dev, pos, iter) 88 89 #ifdef CONFIG_NET_POLL_CONTROLLER 90 extern atomic_t netpoll_block_tx; 91 92 static inline void block_netpoll_tx(void) 93 { 94 atomic_inc(&netpoll_block_tx); 95 } 96 97 static inline void unblock_netpoll_tx(void) 98 { 99 atomic_dec(&netpoll_block_tx); 100 } 101 102 static inline int is_netpoll_tx_blocked(struct net_device *dev) 103 { 104 if (unlikely(netpoll_tx_running(dev))) 105 return atomic_read(&netpoll_block_tx); 106 return 0; 107 } 108 #else 109 #define block_netpoll_tx() 110 #define unblock_netpoll_tx() 111 #define is_netpoll_tx_blocked(dev) (0) 112 #endif 113 114 struct bond_params { 115 int mode; 116 int xmit_policy; 117 int miimon; 118 u8 num_peer_notif; 119 int arp_interval; 120 int arp_validate; 121 int arp_all_targets; 122 int use_carrier; 123 int fail_over_mac; 124 int updelay; 125 int downdelay; 126 int peer_notif_delay; 127 int lacp_fast; 128 unsigned int min_links; 129 int ad_select; 130 char primary[IFNAMSIZ]; 131 int primary_reselect; 132 __be32 arp_targets[BOND_MAX_ARP_TARGETS]; 133 int tx_queues; 134 int all_slaves_active; 135 int resend_igmp; 136 int lp_interval; 137 int packets_per_slave; 138 int tlb_dynamic_lb; 139 struct reciprocal_value reciprocal_packets_per_slave; 140 u16 ad_actor_sys_prio; 141 u16 ad_user_port_key; 142 143 /* 2 bytes of padding : see ether_addr_equal_64bits() */ 144 u8 ad_actor_system[ETH_ALEN + 2]; 145 }; 146 147 struct bond_parm_tbl { 148 char *modename; 149 int mode; 150 }; 151 152 struct slave { 153 struct net_device *dev; /* first - useful for panic debug */ 154 struct bonding *bond; /* our master */ 155 int delay; 156 /* all three in jiffies */ 157 unsigned long last_link_up; 158 unsigned long last_rx; 159 unsigned long target_last_arp_rx[BOND_MAX_ARP_TARGETS]; 160 s8 link; /* one of BOND_LINK_XXXX */ 161 s8 link_new_state; /* one of BOND_LINK_XXXX */ 162 u8 backup:1, /* indicates backup slave. Value corresponds with 163 BOND_STATE_ACTIVE and BOND_STATE_BACKUP */ 164 inactive:1, /* indicates inactive slave */ 165 should_notify:1, /* indicates whether the state changed */ 166 should_notify_link:1; /* indicates whether the link changed */ 167 u8 duplex; 168 u32 original_mtu; 169 u32 link_failure_count; 170 u32 speed; 171 u16 queue_id; 172 u8 perm_hwaddr[MAX_ADDR_LEN]; 173 struct ad_slave_info *ad_info; 174 struct tlb_slave_info tlb_info; 175 #ifdef CONFIG_NET_POLL_CONTROLLER 176 struct netpoll *np; 177 #endif 178 struct delayed_work notify_work; 179 struct kobject kobj; 180 struct rtnl_link_stats64 slave_stats; 181 }; 182 183 struct bond_up_slave { 184 unsigned int count; 185 struct rcu_head rcu; 186 struct slave *arr[]; 187 }; 188 189 /* 190 * Link pseudo-state only used internally by monitors 191 */ 192 #define BOND_LINK_NOCHANGE -1 193 194 /* 195 * Here are the locking policies for the two bonding locks: 196 * Get rcu_read_lock when reading or RTNL when writing slave list. 197 */ 198 struct bonding { 199 struct net_device *dev; /* first - useful for panic debug */ 200 struct slave __rcu *curr_active_slave; 201 struct slave __rcu *current_arp_slave; 202 struct slave __rcu *primary_slave; 203 struct bond_up_slave __rcu *usable_slaves; 204 struct bond_up_slave __rcu *all_slaves; 205 bool force_primary; 206 s32 slave_cnt; /* never change this value outside the attach/detach wrappers */ 207 int (*recv_probe)(const struct sk_buff *, struct bonding *, 208 struct slave *); 209 /* mode_lock is used for mode-specific locking needs, currently used by: 210 * 3ad mode (4) - protect against running bond_3ad_unbind_slave() and 211 * bond_3ad_state_machine_handler() concurrently and also 212 * the access to the state machine shared variables. 213 * TLB mode (5) - to sync the use and modifications of its hash table 214 * ALB mode (6) - to sync the use and modifications of its hash table 215 */ 216 spinlock_t mode_lock; 217 spinlock_t stats_lock; 218 u8 send_peer_notif; 219 u8 igmp_retrans; 220 #ifdef CONFIG_PROC_FS 221 struct proc_dir_entry *proc_entry; 222 char proc_file_name[IFNAMSIZ]; 223 #endif /* CONFIG_PROC_FS */ 224 struct list_head bond_list; 225 u32 rr_tx_counter; 226 struct ad_bond_info ad_info; 227 struct alb_bond_info alb_info; 228 struct bond_params params; 229 struct workqueue_struct *wq; 230 struct delayed_work mii_work; 231 struct delayed_work arp_work; 232 struct delayed_work alb_work; 233 struct delayed_work ad_work; 234 struct delayed_work mcast_work; 235 struct delayed_work slave_arr_work; 236 #ifdef CONFIG_DEBUG_FS 237 /* debugging support via debugfs */ 238 struct dentry *debug_dir; 239 #endif /* CONFIG_DEBUG_FS */ 240 struct rtnl_link_stats64 bond_stats; 241 #ifdef CONFIG_XFRM_OFFLOAD 242 struct xfrm_state *xs; 243 #endif /* CONFIG_XFRM_OFFLOAD */ 244 }; 245 246 #define bond_slave_get_rcu(dev) \ 247 ((struct slave *) rcu_dereference(dev->rx_handler_data)) 248 249 #define bond_slave_get_rtnl(dev) \ 250 ((struct slave *) rtnl_dereference(dev->rx_handler_data)) 251 252 void bond_queue_slave_event(struct slave *slave); 253 void bond_lower_state_changed(struct slave *slave); 254 255 struct bond_vlan_tag { 256 __be16 vlan_proto; 257 unsigned short vlan_id; 258 }; 259 260 /** 261 * Returns NULL if the net_device does not belong to any of the bond's slaves 262 * 263 * Caller must hold bond lock for read 264 */ 265 static inline struct slave *bond_get_slave_by_dev(struct bonding *bond, 266 struct net_device *slave_dev) 267 { 268 return netdev_lower_dev_get_private(bond->dev, slave_dev); 269 } 270 271 static inline struct bonding *bond_get_bond_by_slave(struct slave *slave) 272 { 273 return slave->bond; 274 } 275 276 static inline bool bond_should_override_tx_queue(struct bonding *bond) 277 { 278 return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP || 279 BOND_MODE(bond) == BOND_MODE_ROUNDROBIN; 280 } 281 282 static inline bool bond_is_lb(const struct bonding *bond) 283 { 284 return BOND_MODE(bond) == BOND_MODE_TLB || 285 BOND_MODE(bond) == BOND_MODE_ALB; 286 } 287 288 static inline bool bond_needs_speed_duplex(const struct bonding *bond) 289 { 290 return BOND_MODE(bond) == BOND_MODE_8023AD || bond_is_lb(bond); 291 } 292 293 static inline bool bond_is_nondyn_tlb(const struct bonding *bond) 294 { 295 return (bond_is_lb(bond) && bond->params.tlb_dynamic_lb == 0); 296 } 297 298 static inline bool bond_mode_can_use_xmit_hash(const struct bonding *bond) 299 { 300 return (BOND_MODE(bond) == BOND_MODE_8023AD || 301 BOND_MODE(bond) == BOND_MODE_XOR || 302 BOND_MODE(bond) == BOND_MODE_TLB || 303 BOND_MODE(bond) == BOND_MODE_ALB); 304 } 305 306 static inline bool bond_mode_uses_xmit_hash(const struct bonding *bond) 307 { 308 return (BOND_MODE(bond) == BOND_MODE_8023AD || 309 BOND_MODE(bond) == BOND_MODE_XOR || 310 bond_is_nondyn_tlb(bond)); 311 } 312 313 static inline bool bond_mode_uses_arp(int mode) 314 { 315 return mode != BOND_MODE_8023AD && mode != BOND_MODE_TLB && 316 mode != BOND_MODE_ALB; 317 } 318 319 static inline bool bond_mode_uses_primary(int mode) 320 { 321 return mode == BOND_MODE_ACTIVEBACKUP || mode == BOND_MODE_TLB || 322 mode == BOND_MODE_ALB; 323 } 324 325 static inline bool bond_uses_primary(struct bonding *bond) 326 { 327 return bond_mode_uses_primary(BOND_MODE(bond)); 328 } 329 330 static inline struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond) 331 { 332 struct slave *slave = rcu_dereference(bond->curr_active_slave); 333 334 return bond_uses_primary(bond) && slave ? slave->dev : NULL; 335 } 336 337 static inline bool bond_slave_is_up(struct slave *slave) 338 { 339 return netif_running(slave->dev) && netif_carrier_ok(slave->dev); 340 } 341 342 static inline void bond_set_active_slave(struct slave *slave) 343 { 344 if (slave->backup) { 345 slave->backup = 0; 346 bond_queue_slave_event(slave); 347 bond_lower_state_changed(slave); 348 } 349 } 350 351 static inline void bond_set_backup_slave(struct slave *slave) 352 { 353 if (!slave->backup) { 354 slave->backup = 1; 355 bond_queue_slave_event(slave); 356 bond_lower_state_changed(slave); 357 } 358 } 359 360 static inline void bond_set_slave_state(struct slave *slave, 361 int slave_state, bool notify) 362 { 363 if (slave->backup == slave_state) 364 return; 365 366 slave->backup = slave_state; 367 if (notify) { 368 bond_lower_state_changed(slave); 369 bond_queue_slave_event(slave); 370 slave->should_notify = 0; 371 } else { 372 if (slave->should_notify) 373 slave->should_notify = 0; 374 else 375 slave->should_notify = 1; 376 } 377 } 378 379 static inline void bond_slave_state_change(struct bonding *bond) 380 { 381 struct list_head *iter; 382 struct slave *tmp; 383 384 bond_for_each_slave(bond, tmp, iter) { 385 if (tmp->link == BOND_LINK_UP) 386 bond_set_active_slave(tmp); 387 else if (tmp->link == BOND_LINK_DOWN) 388 bond_set_backup_slave(tmp); 389 } 390 } 391 392 static inline void bond_slave_state_notify(struct bonding *bond) 393 { 394 struct list_head *iter; 395 struct slave *tmp; 396 397 bond_for_each_slave(bond, tmp, iter) { 398 if (tmp->should_notify) { 399 bond_lower_state_changed(tmp); 400 tmp->should_notify = 0; 401 } 402 } 403 } 404 405 static inline int bond_slave_state(struct slave *slave) 406 { 407 return slave->backup; 408 } 409 410 static inline bool bond_is_active_slave(struct slave *slave) 411 { 412 return !bond_slave_state(slave); 413 } 414 415 static inline bool bond_slave_can_tx(struct slave *slave) 416 { 417 return bond_slave_is_up(slave) && slave->link == BOND_LINK_UP && 418 bond_is_active_slave(slave); 419 } 420 421 static inline bool bond_is_active_slave_dev(const struct net_device *slave_dev) 422 { 423 struct slave *slave; 424 bool active; 425 426 rcu_read_lock(); 427 slave = bond_slave_get_rcu(slave_dev); 428 active = bond_is_active_slave(slave); 429 rcu_read_unlock(); 430 431 return active; 432 } 433 434 static inline void bond_hw_addr_copy(u8 *dst, const u8 *src, unsigned int len) 435 { 436 if (len == ETH_ALEN) { 437 ether_addr_copy(dst, src); 438 return; 439 } 440 441 memcpy(dst, src, len); 442 } 443 444 #define BOND_PRI_RESELECT_ALWAYS 0 445 #define BOND_PRI_RESELECT_BETTER 1 446 #define BOND_PRI_RESELECT_FAILURE 2 447 448 #define BOND_FOM_NONE 0 449 #define BOND_FOM_ACTIVE 1 450 #define BOND_FOM_FOLLOW 2 451 452 #define BOND_ARP_TARGETS_ANY 0 453 #define BOND_ARP_TARGETS_ALL 1 454 455 #define BOND_ARP_VALIDATE_NONE 0 456 #define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE) 457 #define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP) 458 #define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE | \ 459 BOND_ARP_VALIDATE_BACKUP) 460 #define BOND_ARP_FILTER (BOND_ARP_VALIDATE_ALL + 1) 461 #define BOND_ARP_FILTER_ACTIVE (BOND_ARP_VALIDATE_ACTIVE | \ 462 BOND_ARP_FILTER) 463 #define BOND_ARP_FILTER_BACKUP (BOND_ARP_VALIDATE_BACKUP | \ 464 BOND_ARP_FILTER) 465 466 #define BOND_SLAVE_NOTIFY_NOW true 467 #define BOND_SLAVE_NOTIFY_LATER false 468 469 static inline int slave_do_arp_validate(struct bonding *bond, 470 struct slave *slave) 471 { 472 return bond->params.arp_validate & (1 << bond_slave_state(slave)); 473 } 474 475 static inline int slave_do_arp_validate_only(struct bonding *bond) 476 { 477 return bond->params.arp_validate & BOND_ARP_FILTER; 478 } 479 480 static inline int bond_is_ip_target_ok(__be32 addr) 481 { 482 return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr); 483 } 484 485 /* Get the oldest arp which we've received on this slave for bond's 486 * arp_targets. 487 */ 488 static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond, 489 struct slave *slave) 490 { 491 int i = 1; 492 unsigned long ret = slave->target_last_arp_rx[0]; 493 494 for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++) 495 if (time_before(slave->target_last_arp_rx[i], ret)) 496 ret = slave->target_last_arp_rx[i]; 497 498 return ret; 499 } 500 501 static inline unsigned long slave_last_rx(struct bonding *bond, 502 struct slave *slave) 503 { 504 if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL) 505 return slave_oldest_target_arp_rx(bond, slave); 506 507 return slave->last_rx; 508 } 509 510 #ifdef CONFIG_NET_POLL_CONTROLLER 511 static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave, 512 struct sk_buff *skb) 513 { 514 return netpoll_send_skb(slave->np, skb); 515 } 516 #else 517 static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave, 518 struct sk_buff *skb) 519 { 520 BUG(); 521 return NETDEV_TX_OK; 522 } 523 #endif 524 525 static inline void bond_set_slave_inactive_flags(struct slave *slave, 526 bool notify) 527 { 528 if (!bond_is_lb(slave->bond)) 529 bond_set_slave_state(slave, BOND_STATE_BACKUP, notify); 530 if (!slave->bond->params.all_slaves_active) 531 slave->inactive = 1; 532 } 533 534 static inline void bond_set_slave_active_flags(struct slave *slave, 535 bool notify) 536 { 537 bond_set_slave_state(slave, BOND_STATE_ACTIVE, notify); 538 slave->inactive = 0; 539 } 540 541 static inline bool bond_is_slave_inactive(struct slave *slave) 542 { 543 return slave->inactive; 544 } 545 546 static inline void bond_propose_link_state(struct slave *slave, int state) 547 { 548 slave->link_new_state = state; 549 } 550 551 static inline void bond_commit_link_state(struct slave *slave, bool notify) 552 { 553 if (slave->link_new_state == BOND_LINK_NOCHANGE) 554 return; 555 556 slave->link = slave->link_new_state; 557 if (notify) { 558 bond_queue_slave_event(slave); 559 bond_lower_state_changed(slave); 560 slave->should_notify_link = 0; 561 } else { 562 if (slave->should_notify_link) 563 slave->should_notify_link = 0; 564 else 565 slave->should_notify_link = 1; 566 } 567 } 568 569 static inline void bond_set_slave_link_state(struct slave *slave, int state, 570 bool notify) 571 { 572 bond_propose_link_state(slave, state); 573 bond_commit_link_state(slave, notify); 574 } 575 576 static inline void bond_slave_link_notify(struct bonding *bond) 577 { 578 struct list_head *iter; 579 struct slave *tmp; 580 581 bond_for_each_slave(bond, tmp, iter) { 582 if (tmp->should_notify_link) { 583 bond_queue_slave_event(tmp); 584 bond_lower_state_changed(tmp); 585 tmp->should_notify_link = 0; 586 } 587 } 588 } 589 590 static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local) 591 { 592 struct in_device *in_dev; 593 __be32 addr = 0; 594 595 rcu_read_lock(); 596 in_dev = __in_dev_get_rcu(dev); 597 598 if (in_dev) 599 addr = inet_confirm_addr(dev_net(dev), in_dev, dst, local, 600 RT_SCOPE_HOST); 601 rcu_read_unlock(); 602 return addr; 603 } 604 605 struct bond_net { 606 struct net *net; /* Associated network namespace */ 607 struct list_head dev_list; 608 #ifdef CONFIG_PROC_FS 609 struct proc_dir_entry *proc_dir; 610 #endif 611 struct class_attribute class_attr_bonding_masters; 612 }; 613 614 int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond, struct slave *slave); 615 netdev_tx_t bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev); 616 int bond_create(struct net *net, const char *name); 617 int bond_create_sysfs(struct bond_net *net); 618 void bond_destroy_sysfs(struct bond_net *net); 619 void bond_prepare_sysfs_group(struct bonding *bond); 620 int bond_sysfs_slave_add(struct slave *slave); 621 void bond_sysfs_slave_del(struct slave *slave); 622 int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev, 623 struct netlink_ext_ack *extack); 624 int bond_release(struct net_device *bond_dev, struct net_device *slave_dev); 625 u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb); 626 int bond_set_carrier(struct bonding *bond); 627 void bond_select_active_slave(struct bonding *bond); 628 void bond_change_active_slave(struct bonding *bond, struct slave *new_active); 629 void bond_create_debugfs(void); 630 void bond_destroy_debugfs(void); 631 void bond_debug_register(struct bonding *bond); 632 void bond_debug_unregister(struct bonding *bond); 633 void bond_debug_reregister(struct bonding *bond); 634 const char *bond_mode_name(int mode); 635 void bond_setup(struct net_device *bond_dev); 636 unsigned int bond_get_num_tx_queues(void); 637 int bond_netlink_init(void); 638 void bond_netlink_fini(void); 639 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond); 640 const char *bond_slave_link_status(s8 link); 641 struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev, 642 struct net_device *end_dev, 643 int level); 644 int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave); 645 void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay); 646 void bond_work_init_all(struct bonding *bond); 647 648 #ifdef CONFIG_PROC_FS 649 void bond_create_proc_entry(struct bonding *bond); 650 void bond_remove_proc_entry(struct bonding *bond); 651 void bond_create_proc_dir(struct bond_net *bn); 652 void bond_destroy_proc_dir(struct bond_net *bn); 653 #else 654 static inline void bond_create_proc_entry(struct bonding *bond) 655 { 656 } 657 658 static inline void bond_remove_proc_entry(struct bonding *bond) 659 { 660 } 661 662 static inline void bond_create_proc_dir(struct bond_net *bn) 663 { 664 } 665 666 static inline void bond_destroy_proc_dir(struct bond_net *bn) 667 { 668 } 669 #endif 670 671 static inline struct slave *bond_slave_has_mac(struct bonding *bond, 672 const u8 *mac) 673 { 674 struct list_head *iter; 675 struct slave *tmp; 676 677 bond_for_each_slave(bond, tmp, iter) 678 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr)) 679 return tmp; 680 681 return NULL; 682 } 683 684 /* Caller must hold rcu_read_lock() for read */ 685 static inline struct slave *bond_slave_has_mac_rcu(struct bonding *bond, 686 const u8 *mac) 687 { 688 struct list_head *iter; 689 struct slave *tmp; 690 691 bond_for_each_slave_rcu(bond, tmp, iter) 692 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr)) 693 return tmp; 694 695 return NULL; 696 } 697 698 /* Caller must hold rcu_read_lock() for read */ 699 static inline bool bond_slave_has_mac_rx(struct bonding *bond, const u8 *mac) 700 { 701 struct list_head *iter; 702 struct slave *tmp; 703 struct netdev_hw_addr *ha; 704 705 bond_for_each_slave_rcu(bond, tmp, iter) 706 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr)) 707 return true; 708 709 if (netdev_uc_empty(bond->dev)) 710 return false; 711 712 netdev_for_each_uc_addr(ha, bond->dev) 713 if (ether_addr_equal_64bits(mac, ha->addr)) 714 return true; 715 716 return false; 717 } 718 719 /* Check if the ip is present in arp ip list, or first free slot if ip == 0 720 * Returns -1 if not found, index if found 721 */ 722 static inline int bond_get_targets_ip(__be32 *targets, __be32 ip) 723 { 724 int i; 725 726 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) 727 if (targets[i] == ip) 728 return i; 729 else if (targets[i] == 0) 730 break; 731 732 return -1; 733 } 734 735 /* exported from bond_main.c */ 736 extern unsigned int bond_net_id; 737 extern const struct bond_parm_tbl bond_lacp_tbl[]; 738 extern const struct bond_parm_tbl xmit_hashtype_tbl[]; 739 extern const struct bond_parm_tbl arp_validate_tbl[]; 740 extern const struct bond_parm_tbl arp_all_targets_tbl[]; 741 extern const struct bond_parm_tbl fail_over_mac_tbl[]; 742 extern const struct bond_parm_tbl pri_reselect_tbl[]; 743 extern struct bond_parm_tbl ad_select_tbl[]; 744 745 /* exported from bond_netlink.c */ 746 extern struct rtnl_link_ops bond_link_ops; 747 748 static inline netdev_tx_t bond_tx_drop(struct net_device *dev, struct sk_buff *skb) 749 { 750 atomic_long_inc(&dev->tx_dropped); 751 dev_kfree_skb_any(skb); 752 return NET_XMIT_DROP; 753 } 754 755 #endif /* _NET_BONDING_H */ 756