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 }; 242 243 #define bond_slave_get_rcu(dev) \ 244 ((struct slave *) rcu_dereference(dev->rx_handler_data)) 245 246 #define bond_slave_get_rtnl(dev) \ 247 ((struct slave *) rtnl_dereference(dev->rx_handler_data)) 248 249 void bond_queue_slave_event(struct slave *slave); 250 void bond_lower_state_changed(struct slave *slave); 251 252 struct bond_vlan_tag { 253 __be16 vlan_proto; 254 unsigned short vlan_id; 255 }; 256 257 /** 258 * Returns NULL if the net_device does not belong to any of the bond's slaves 259 * 260 * Caller must hold bond lock for read 261 */ 262 static inline struct slave *bond_get_slave_by_dev(struct bonding *bond, 263 struct net_device *slave_dev) 264 { 265 return netdev_lower_dev_get_private(bond->dev, slave_dev); 266 } 267 268 static inline struct bonding *bond_get_bond_by_slave(struct slave *slave) 269 { 270 return slave->bond; 271 } 272 273 static inline bool bond_should_override_tx_queue(struct bonding *bond) 274 { 275 return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP || 276 BOND_MODE(bond) == BOND_MODE_ROUNDROBIN; 277 } 278 279 static inline bool bond_is_lb(const struct bonding *bond) 280 { 281 return BOND_MODE(bond) == BOND_MODE_TLB || 282 BOND_MODE(bond) == BOND_MODE_ALB; 283 } 284 285 static inline bool bond_needs_speed_duplex(const struct bonding *bond) 286 { 287 return BOND_MODE(bond) == BOND_MODE_8023AD || bond_is_lb(bond); 288 } 289 290 static inline bool bond_is_nondyn_tlb(const struct bonding *bond) 291 { 292 return (bond_is_lb(bond) && bond->params.tlb_dynamic_lb == 0); 293 } 294 295 static inline bool bond_mode_can_use_xmit_hash(const struct bonding *bond) 296 { 297 return (BOND_MODE(bond) == BOND_MODE_8023AD || 298 BOND_MODE(bond) == BOND_MODE_XOR || 299 BOND_MODE(bond) == BOND_MODE_TLB || 300 BOND_MODE(bond) == BOND_MODE_ALB); 301 } 302 303 static inline bool bond_mode_uses_xmit_hash(const struct bonding *bond) 304 { 305 return (BOND_MODE(bond) == BOND_MODE_8023AD || 306 BOND_MODE(bond) == BOND_MODE_XOR || 307 bond_is_nondyn_tlb(bond)); 308 } 309 310 static inline bool bond_mode_uses_arp(int mode) 311 { 312 return mode != BOND_MODE_8023AD && mode != BOND_MODE_TLB && 313 mode != BOND_MODE_ALB; 314 } 315 316 static inline bool bond_mode_uses_primary(int mode) 317 { 318 return mode == BOND_MODE_ACTIVEBACKUP || mode == BOND_MODE_TLB || 319 mode == BOND_MODE_ALB; 320 } 321 322 static inline bool bond_uses_primary(struct bonding *bond) 323 { 324 return bond_mode_uses_primary(BOND_MODE(bond)); 325 } 326 327 static inline struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond) 328 { 329 struct slave *slave = rcu_dereference(bond->curr_active_slave); 330 331 return bond_uses_primary(bond) && slave ? slave->dev : NULL; 332 } 333 334 static inline bool bond_slave_is_up(struct slave *slave) 335 { 336 return netif_running(slave->dev) && netif_carrier_ok(slave->dev); 337 } 338 339 static inline void bond_set_active_slave(struct slave *slave) 340 { 341 if (slave->backup) { 342 slave->backup = 0; 343 bond_queue_slave_event(slave); 344 bond_lower_state_changed(slave); 345 } 346 } 347 348 static inline void bond_set_backup_slave(struct slave *slave) 349 { 350 if (!slave->backup) { 351 slave->backup = 1; 352 bond_queue_slave_event(slave); 353 bond_lower_state_changed(slave); 354 } 355 } 356 357 static inline void bond_set_slave_state(struct slave *slave, 358 int slave_state, bool notify) 359 { 360 if (slave->backup == slave_state) 361 return; 362 363 slave->backup = slave_state; 364 if (notify) { 365 bond_lower_state_changed(slave); 366 bond_queue_slave_event(slave); 367 slave->should_notify = 0; 368 } else { 369 if (slave->should_notify) 370 slave->should_notify = 0; 371 else 372 slave->should_notify = 1; 373 } 374 } 375 376 static inline void bond_slave_state_change(struct bonding *bond) 377 { 378 struct list_head *iter; 379 struct slave *tmp; 380 381 bond_for_each_slave(bond, tmp, iter) { 382 if (tmp->link == BOND_LINK_UP) 383 bond_set_active_slave(tmp); 384 else if (tmp->link == BOND_LINK_DOWN) 385 bond_set_backup_slave(tmp); 386 } 387 } 388 389 static inline void bond_slave_state_notify(struct bonding *bond) 390 { 391 struct list_head *iter; 392 struct slave *tmp; 393 394 bond_for_each_slave(bond, tmp, iter) { 395 if (tmp->should_notify) { 396 bond_lower_state_changed(tmp); 397 tmp->should_notify = 0; 398 } 399 } 400 } 401 402 static inline int bond_slave_state(struct slave *slave) 403 { 404 return slave->backup; 405 } 406 407 static inline bool bond_is_active_slave(struct slave *slave) 408 { 409 return !bond_slave_state(slave); 410 } 411 412 static inline bool bond_slave_can_tx(struct slave *slave) 413 { 414 return bond_slave_is_up(slave) && slave->link == BOND_LINK_UP && 415 bond_is_active_slave(slave); 416 } 417 418 static inline bool bond_is_active_slave_dev(const struct net_device *slave_dev) 419 { 420 struct slave *slave; 421 bool active; 422 423 rcu_read_lock(); 424 slave = bond_slave_get_rcu(slave_dev); 425 active = bond_is_active_slave(slave); 426 rcu_read_unlock(); 427 428 return active; 429 } 430 431 static inline void bond_hw_addr_copy(u8 *dst, const u8 *src, unsigned int len) 432 { 433 if (len == ETH_ALEN) { 434 ether_addr_copy(dst, src); 435 return; 436 } 437 438 memcpy(dst, src, len); 439 } 440 441 #define BOND_PRI_RESELECT_ALWAYS 0 442 #define BOND_PRI_RESELECT_BETTER 1 443 #define BOND_PRI_RESELECT_FAILURE 2 444 445 #define BOND_FOM_NONE 0 446 #define BOND_FOM_ACTIVE 1 447 #define BOND_FOM_FOLLOW 2 448 449 #define BOND_ARP_TARGETS_ANY 0 450 #define BOND_ARP_TARGETS_ALL 1 451 452 #define BOND_ARP_VALIDATE_NONE 0 453 #define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE) 454 #define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP) 455 #define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE | \ 456 BOND_ARP_VALIDATE_BACKUP) 457 #define BOND_ARP_FILTER (BOND_ARP_VALIDATE_ALL + 1) 458 #define BOND_ARP_FILTER_ACTIVE (BOND_ARP_VALIDATE_ACTIVE | \ 459 BOND_ARP_FILTER) 460 #define BOND_ARP_FILTER_BACKUP (BOND_ARP_VALIDATE_BACKUP | \ 461 BOND_ARP_FILTER) 462 463 #define BOND_SLAVE_NOTIFY_NOW true 464 #define BOND_SLAVE_NOTIFY_LATER false 465 466 static inline int slave_do_arp_validate(struct bonding *bond, 467 struct slave *slave) 468 { 469 return bond->params.arp_validate & (1 << bond_slave_state(slave)); 470 } 471 472 static inline int slave_do_arp_validate_only(struct bonding *bond) 473 { 474 return bond->params.arp_validate & BOND_ARP_FILTER; 475 } 476 477 static inline int bond_is_ip_target_ok(__be32 addr) 478 { 479 return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr); 480 } 481 482 /* Get the oldest arp which we've received on this slave for bond's 483 * arp_targets. 484 */ 485 static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond, 486 struct slave *slave) 487 { 488 int i = 1; 489 unsigned long ret = slave->target_last_arp_rx[0]; 490 491 for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++) 492 if (time_before(slave->target_last_arp_rx[i], ret)) 493 ret = slave->target_last_arp_rx[i]; 494 495 return ret; 496 } 497 498 static inline unsigned long slave_last_rx(struct bonding *bond, 499 struct slave *slave) 500 { 501 if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL) 502 return slave_oldest_target_arp_rx(bond, slave); 503 504 return slave->last_rx; 505 } 506 507 #ifdef CONFIG_NET_POLL_CONTROLLER 508 static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave, 509 struct sk_buff *skb) 510 { 511 return netpoll_send_skb(slave->np, skb); 512 } 513 #else 514 static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave, 515 struct sk_buff *skb) 516 { 517 BUG(); 518 return NETDEV_TX_OK; 519 } 520 #endif 521 522 static inline void bond_set_slave_inactive_flags(struct slave *slave, 523 bool notify) 524 { 525 if (!bond_is_lb(slave->bond)) 526 bond_set_slave_state(slave, BOND_STATE_BACKUP, notify); 527 if (!slave->bond->params.all_slaves_active) 528 slave->inactive = 1; 529 } 530 531 static inline void bond_set_slave_active_flags(struct slave *slave, 532 bool notify) 533 { 534 bond_set_slave_state(slave, BOND_STATE_ACTIVE, notify); 535 slave->inactive = 0; 536 } 537 538 static inline bool bond_is_slave_inactive(struct slave *slave) 539 { 540 return slave->inactive; 541 } 542 543 static inline void bond_propose_link_state(struct slave *slave, int state) 544 { 545 slave->link_new_state = state; 546 } 547 548 static inline void bond_commit_link_state(struct slave *slave, bool notify) 549 { 550 if (slave->link_new_state == BOND_LINK_NOCHANGE) 551 return; 552 553 slave->link = slave->link_new_state; 554 if (notify) { 555 bond_queue_slave_event(slave); 556 bond_lower_state_changed(slave); 557 slave->should_notify_link = 0; 558 } else { 559 if (slave->should_notify_link) 560 slave->should_notify_link = 0; 561 else 562 slave->should_notify_link = 1; 563 } 564 } 565 566 static inline void bond_set_slave_link_state(struct slave *slave, int state, 567 bool notify) 568 { 569 bond_propose_link_state(slave, state); 570 bond_commit_link_state(slave, notify); 571 } 572 573 static inline void bond_slave_link_notify(struct bonding *bond) 574 { 575 struct list_head *iter; 576 struct slave *tmp; 577 578 bond_for_each_slave(bond, tmp, iter) { 579 if (tmp->should_notify_link) { 580 bond_queue_slave_event(tmp); 581 bond_lower_state_changed(tmp); 582 tmp->should_notify_link = 0; 583 } 584 } 585 } 586 587 static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local) 588 { 589 struct in_device *in_dev; 590 __be32 addr = 0; 591 592 rcu_read_lock(); 593 in_dev = __in_dev_get_rcu(dev); 594 595 if (in_dev) 596 addr = inet_confirm_addr(dev_net(dev), in_dev, dst, local, 597 RT_SCOPE_HOST); 598 rcu_read_unlock(); 599 return addr; 600 } 601 602 struct bond_net { 603 struct net *net; /* Associated network namespace */ 604 struct list_head dev_list; 605 #ifdef CONFIG_PROC_FS 606 struct proc_dir_entry *proc_dir; 607 #endif 608 struct class_attribute class_attr_bonding_masters; 609 }; 610 611 int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond, struct slave *slave); 612 netdev_tx_t bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev); 613 int bond_create(struct net *net, const char *name); 614 int bond_create_sysfs(struct bond_net *net); 615 void bond_destroy_sysfs(struct bond_net *net); 616 void bond_prepare_sysfs_group(struct bonding *bond); 617 int bond_sysfs_slave_add(struct slave *slave); 618 void bond_sysfs_slave_del(struct slave *slave); 619 int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev, 620 struct netlink_ext_ack *extack); 621 int bond_release(struct net_device *bond_dev, struct net_device *slave_dev); 622 u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb); 623 int bond_set_carrier(struct bonding *bond); 624 void bond_select_active_slave(struct bonding *bond); 625 void bond_change_active_slave(struct bonding *bond, struct slave *new_active); 626 void bond_create_debugfs(void); 627 void bond_destroy_debugfs(void); 628 void bond_debug_register(struct bonding *bond); 629 void bond_debug_unregister(struct bonding *bond); 630 void bond_debug_reregister(struct bonding *bond); 631 const char *bond_mode_name(int mode); 632 void bond_setup(struct net_device *bond_dev); 633 unsigned int bond_get_num_tx_queues(void); 634 int bond_netlink_init(void); 635 void bond_netlink_fini(void); 636 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond); 637 const char *bond_slave_link_status(s8 link); 638 struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev, 639 struct net_device *end_dev, 640 int level); 641 int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave); 642 void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay); 643 void bond_work_init_all(struct bonding *bond); 644 645 #ifdef CONFIG_PROC_FS 646 void bond_create_proc_entry(struct bonding *bond); 647 void bond_remove_proc_entry(struct bonding *bond); 648 void bond_create_proc_dir(struct bond_net *bn); 649 void bond_destroy_proc_dir(struct bond_net *bn); 650 #else 651 static inline void bond_create_proc_entry(struct bonding *bond) 652 { 653 } 654 655 static inline void bond_remove_proc_entry(struct bonding *bond) 656 { 657 } 658 659 static inline void bond_create_proc_dir(struct bond_net *bn) 660 { 661 } 662 663 static inline void bond_destroy_proc_dir(struct bond_net *bn) 664 { 665 } 666 #endif 667 668 static inline struct slave *bond_slave_has_mac(struct bonding *bond, 669 const u8 *mac) 670 { 671 struct list_head *iter; 672 struct slave *tmp; 673 674 bond_for_each_slave(bond, tmp, iter) 675 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr)) 676 return tmp; 677 678 return NULL; 679 } 680 681 /* Caller must hold rcu_read_lock() for read */ 682 static inline struct slave *bond_slave_has_mac_rcu(struct bonding *bond, 683 const u8 *mac) 684 { 685 struct list_head *iter; 686 struct slave *tmp; 687 688 bond_for_each_slave_rcu(bond, tmp, iter) 689 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr)) 690 return tmp; 691 692 return NULL; 693 } 694 695 /* Caller must hold rcu_read_lock() for read */ 696 static inline bool bond_slave_has_mac_rx(struct bonding *bond, const u8 *mac) 697 { 698 struct list_head *iter; 699 struct slave *tmp; 700 struct netdev_hw_addr *ha; 701 702 bond_for_each_slave_rcu(bond, tmp, iter) 703 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr)) 704 return true; 705 706 if (netdev_uc_empty(bond->dev)) 707 return false; 708 709 netdev_for_each_uc_addr(ha, bond->dev) 710 if (ether_addr_equal_64bits(mac, ha->addr)) 711 return true; 712 713 return false; 714 } 715 716 /* Check if the ip is present in arp ip list, or first free slot if ip == 0 717 * Returns -1 if not found, index if found 718 */ 719 static inline int bond_get_targets_ip(__be32 *targets, __be32 ip) 720 { 721 int i; 722 723 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) 724 if (targets[i] == ip) 725 return i; 726 else if (targets[i] == 0) 727 break; 728 729 return -1; 730 } 731 732 /* exported from bond_main.c */ 733 extern unsigned int bond_net_id; 734 extern const struct bond_parm_tbl bond_lacp_tbl[]; 735 extern const struct bond_parm_tbl xmit_hashtype_tbl[]; 736 extern const struct bond_parm_tbl arp_validate_tbl[]; 737 extern const struct bond_parm_tbl arp_all_targets_tbl[]; 738 extern const struct bond_parm_tbl fail_over_mac_tbl[]; 739 extern const struct bond_parm_tbl pri_reselect_tbl[]; 740 extern struct bond_parm_tbl ad_select_tbl[]; 741 742 /* exported from bond_netlink.c */ 743 extern struct rtnl_link_ops bond_link_ops; 744 745 static inline netdev_tx_t bond_tx_drop(struct net_device *dev, struct sk_buff *skb) 746 { 747 atomic_long_inc(&dev->tx_dropped); 748 dev_kfree_skb_any(skb); 749 return NET_XMIT_DROP; 750 } 751 752 #endif /* _NET_BONDING_H */ 753