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