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