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 #define BOND_XFRM_FEATURES (NETIF_F_HW_ESP | NETIF_F_HW_ESP_TX_CSUM | \ 90 NETIF_F_GSO_ESP) 91 92 #ifdef CONFIG_NET_POLL_CONTROLLER 93 extern atomic_t netpoll_block_tx; 94 95 static inline void block_netpoll_tx(void) 96 { 97 atomic_inc(&netpoll_block_tx); 98 } 99 100 static inline void unblock_netpoll_tx(void) 101 { 102 atomic_dec(&netpoll_block_tx); 103 } 104 105 static inline int is_netpoll_tx_blocked(struct net_device *dev) 106 { 107 if (unlikely(netpoll_tx_running(dev))) 108 return atomic_read(&netpoll_block_tx); 109 return 0; 110 } 111 #else 112 #define block_netpoll_tx() 113 #define unblock_netpoll_tx() 114 #define is_netpoll_tx_blocked(dev) (0) 115 #endif 116 117 struct bond_params { 118 int mode; 119 int xmit_policy; 120 int miimon; 121 u8 num_peer_notif; 122 int arp_interval; 123 int arp_validate; 124 int arp_all_targets; 125 int use_carrier; 126 int fail_over_mac; 127 int updelay; 128 int downdelay; 129 int peer_notif_delay; 130 int lacp_fast; 131 unsigned int min_links; 132 int ad_select; 133 char primary[IFNAMSIZ]; 134 int primary_reselect; 135 __be32 arp_targets[BOND_MAX_ARP_TARGETS]; 136 int tx_queues; 137 int all_slaves_active; 138 int resend_igmp; 139 int lp_interval; 140 int packets_per_slave; 141 int tlb_dynamic_lb; 142 struct reciprocal_value reciprocal_packets_per_slave; 143 u16 ad_actor_sys_prio; 144 u16 ad_user_port_key; 145 146 /* 2 bytes of padding : see ether_addr_equal_64bits() */ 147 u8 ad_actor_system[ETH_ALEN + 2]; 148 }; 149 150 struct bond_parm_tbl { 151 char *modename; 152 int mode; 153 }; 154 155 struct slave { 156 struct net_device *dev; /* first - useful for panic debug */ 157 struct bonding *bond; /* our master */ 158 int delay; 159 /* all three in jiffies */ 160 unsigned long last_link_up; 161 unsigned long last_rx; 162 unsigned long target_last_arp_rx[BOND_MAX_ARP_TARGETS]; 163 s8 link; /* one of BOND_LINK_XXXX */ 164 s8 link_new_state; /* one of BOND_LINK_XXXX */ 165 u8 backup:1, /* indicates backup slave. Value corresponds with 166 BOND_STATE_ACTIVE and BOND_STATE_BACKUP */ 167 inactive:1, /* indicates inactive slave */ 168 should_notify:1, /* indicates whether the state changed */ 169 should_notify_link:1; /* indicates whether the link changed */ 170 u8 duplex; 171 u32 original_mtu; 172 u32 link_failure_count; 173 u32 speed; 174 u16 queue_id; 175 u8 perm_hwaddr[MAX_ADDR_LEN]; 176 struct ad_slave_info *ad_info; 177 struct tlb_slave_info tlb_info; 178 #ifdef CONFIG_NET_POLL_CONTROLLER 179 struct netpoll *np; 180 #endif 181 struct delayed_work notify_work; 182 struct kobject kobj; 183 struct rtnl_link_stats64 slave_stats; 184 }; 185 186 static inline struct slave *to_slave(struct kobject *kobj) 187 { 188 return container_of(kobj, struct slave, kobj); 189 } 190 191 struct bond_up_slave { 192 unsigned int count; 193 struct rcu_head rcu; 194 struct slave *arr[]; 195 }; 196 197 /* 198 * Link pseudo-state only used internally by monitors 199 */ 200 #define BOND_LINK_NOCHANGE -1 201 202 /* 203 * Here are the locking policies for the two bonding locks: 204 * Get rcu_read_lock when reading or RTNL when writing slave list. 205 */ 206 struct bonding { 207 struct net_device *dev; /* first - useful for panic debug */ 208 struct slave __rcu *curr_active_slave; 209 struct slave __rcu *current_arp_slave; 210 struct slave __rcu *primary_slave; 211 struct bond_up_slave __rcu *usable_slaves; 212 struct bond_up_slave __rcu *all_slaves; 213 bool force_primary; 214 s32 slave_cnt; /* never change this value outside the attach/detach wrappers */ 215 int (*recv_probe)(const struct sk_buff *, struct bonding *, 216 struct slave *); 217 /* mode_lock is used for mode-specific locking needs, currently used by: 218 * 3ad mode (4) - protect against running bond_3ad_unbind_slave() and 219 * bond_3ad_state_machine_handler() concurrently and also 220 * the access to the state machine shared variables. 221 * TLB mode (5) - to sync the use and modifications of its hash table 222 * ALB mode (6) - to sync the use and modifications of its hash table 223 */ 224 spinlock_t mode_lock; 225 spinlock_t stats_lock; 226 u8 send_peer_notif; 227 u8 igmp_retrans; 228 #ifdef CONFIG_PROC_FS 229 struct proc_dir_entry *proc_entry; 230 char proc_file_name[IFNAMSIZ]; 231 #endif /* CONFIG_PROC_FS */ 232 struct list_head bond_list; 233 u32 rr_tx_counter; 234 struct ad_bond_info ad_info; 235 struct alb_bond_info alb_info; 236 struct bond_params params; 237 struct workqueue_struct *wq; 238 struct delayed_work mii_work; 239 struct delayed_work arp_work; 240 struct delayed_work alb_work; 241 struct delayed_work ad_work; 242 struct delayed_work mcast_work; 243 struct delayed_work slave_arr_work; 244 #ifdef CONFIG_DEBUG_FS 245 /* debugging support via debugfs */ 246 struct dentry *debug_dir; 247 #endif /* CONFIG_DEBUG_FS */ 248 struct rtnl_link_stats64 bond_stats; 249 #ifdef CONFIG_XFRM_OFFLOAD 250 struct xfrm_state *xs; 251 #endif /* CONFIG_XFRM_OFFLOAD */ 252 }; 253 254 #define bond_slave_get_rcu(dev) \ 255 ((struct slave *) rcu_dereference(dev->rx_handler_data)) 256 257 #define bond_slave_get_rtnl(dev) \ 258 ((struct slave *) rtnl_dereference(dev->rx_handler_data)) 259 260 void bond_queue_slave_event(struct slave *slave); 261 void bond_lower_state_changed(struct slave *slave); 262 263 struct bond_vlan_tag { 264 __be16 vlan_proto; 265 unsigned short vlan_id; 266 }; 267 268 /** 269 * Returns NULL if the net_device does not belong to any of the bond's slaves 270 * 271 * Caller must hold bond lock for read 272 */ 273 static inline struct slave *bond_get_slave_by_dev(struct bonding *bond, 274 struct net_device *slave_dev) 275 { 276 return netdev_lower_dev_get_private(bond->dev, slave_dev); 277 } 278 279 static inline struct bonding *bond_get_bond_by_slave(struct slave *slave) 280 { 281 return slave->bond; 282 } 283 284 static inline bool bond_should_override_tx_queue(struct bonding *bond) 285 { 286 return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP || 287 BOND_MODE(bond) == BOND_MODE_ROUNDROBIN; 288 } 289 290 static inline bool bond_is_lb(const struct bonding *bond) 291 { 292 return BOND_MODE(bond) == BOND_MODE_TLB || 293 BOND_MODE(bond) == BOND_MODE_ALB; 294 } 295 296 static inline bool bond_needs_speed_duplex(const struct bonding *bond) 297 { 298 return BOND_MODE(bond) == BOND_MODE_8023AD || bond_is_lb(bond); 299 } 300 301 static inline bool bond_is_nondyn_tlb(const struct bonding *bond) 302 { 303 return (bond_is_lb(bond) && bond->params.tlb_dynamic_lb == 0); 304 } 305 306 static inline bool bond_mode_can_use_xmit_hash(const struct bonding *bond) 307 { 308 return (BOND_MODE(bond) == BOND_MODE_8023AD || 309 BOND_MODE(bond) == BOND_MODE_XOR || 310 BOND_MODE(bond) == BOND_MODE_TLB || 311 BOND_MODE(bond) == BOND_MODE_ALB); 312 } 313 314 static inline bool bond_mode_uses_xmit_hash(const struct bonding *bond) 315 { 316 return (BOND_MODE(bond) == BOND_MODE_8023AD || 317 BOND_MODE(bond) == BOND_MODE_XOR || 318 bond_is_nondyn_tlb(bond)); 319 } 320 321 static inline bool bond_mode_uses_arp(int mode) 322 { 323 return mode != BOND_MODE_8023AD && mode != BOND_MODE_TLB && 324 mode != BOND_MODE_ALB; 325 } 326 327 static inline bool bond_mode_uses_primary(int mode) 328 { 329 return mode == BOND_MODE_ACTIVEBACKUP || mode == BOND_MODE_TLB || 330 mode == BOND_MODE_ALB; 331 } 332 333 static inline bool bond_uses_primary(struct bonding *bond) 334 { 335 return bond_mode_uses_primary(BOND_MODE(bond)); 336 } 337 338 static inline struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond) 339 { 340 struct slave *slave = rcu_dereference(bond->curr_active_slave); 341 342 return bond_uses_primary(bond) && slave ? slave->dev : NULL; 343 } 344 345 static inline bool bond_slave_is_up(struct slave *slave) 346 { 347 return netif_running(slave->dev) && netif_carrier_ok(slave->dev); 348 } 349 350 static inline void bond_set_active_slave(struct slave *slave) 351 { 352 if (slave->backup) { 353 slave->backup = 0; 354 bond_queue_slave_event(slave); 355 bond_lower_state_changed(slave); 356 } 357 } 358 359 static inline void bond_set_backup_slave(struct slave *slave) 360 { 361 if (!slave->backup) { 362 slave->backup = 1; 363 bond_queue_slave_event(slave); 364 bond_lower_state_changed(slave); 365 } 366 } 367 368 static inline void bond_set_slave_state(struct slave *slave, 369 int slave_state, bool notify) 370 { 371 if (slave->backup == slave_state) 372 return; 373 374 slave->backup = slave_state; 375 if (notify) { 376 bond_lower_state_changed(slave); 377 bond_queue_slave_event(slave); 378 slave->should_notify = 0; 379 } else { 380 if (slave->should_notify) 381 slave->should_notify = 0; 382 else 383 slave->should_notify = 1; 384 } 385 } 386 387 static inline void bond_slave_state_change(struct bonding *bond) 388 { 389 struct list_head *iter; 390 struct slave *tmp; 391 392 bond_for_each_slave(bond, tmp, iter) { 393 if (tmp->link == BOND_LINK_UP) 394 bond_set_active_slave(tmp); 395 else if (tmp->link == BOND_LINK_DOWN) 396 bond_set_backup_slave(tmp); 397 } 398 } 399 400 static inline void bond_slave_state_notify(struct bonding *bond) 401 { 402 struct list_head *iter; 403 struct slave *tmp; 404 405 bond_for_each_slave(bond, tmp, iter) { 406 if (tmp->should_notify) { 407 bond_lower_state_changed(tmp); 408 tmp->should_notify = 0; 409 } 410 } 411 } 412 413 static inline int bond_slave_state(struct slave *slave) 414 { 415 return slave->backup; 416 } 417 418 static inline bool bond_is_active_slave(struct slave *slave) 419 { 420 return !bond_slave_state(slave); 421 } 422 423 static inline bool bond_slave_can_tx(struct slave *slave) 424 { 425 return bond_slave_is_up(slave) && slave->link == BOND_LINK_UP && 426 bond_is_active_slave(slave); 427 } 428 429 static inline bool bond_is_active_slave_dev(const struct net_device *slave_dev) 430 { 431 struct slave *slave; 432 bool active; 433 434 rcu_read_lock(); 435 slave = bond_slave_get_rcu(slave_dev); 436 active = bond_is_active_slave(slave); 437 rcu_read_unlock(); 438 439 return active; 440 } 441 442 static inline void bond_hw_addr_copy(u8 *dst, const u8 *src, unsigned int len) 443 { 444 if (len == ETH_ALEN) { 445 ether_addr_copy(dst, src); 446 return; 447 } 448 449 memcpy(dst, src, len); 450 } 451 452 #define BOND_PRI_RESELECT_ALWAYS 0 453 #define BOND_PRI_RESELECT_BETTER 1 454 #define BOND_PRI_RESELECT_FAILURE 2 455 456 #define BOND_FOM_NONE 0 457 #define BOND_FOM_ACTIVE 1 458 #define BOND_FOM_FOLLOW 2 459 460 #define BOND_ARP_TARGETS_ANY 0 461 #define BOND_ARP_TARGETS_ALL 1 462 463 #define BOND_ARP_VALIDATE_NONE 0 464 #define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE) 465 #define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP) 466 #define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE | \ 467 BOND_ARP_VALIDATE_BACKUP) 468 #define BOND_ARP_FILTER (BOND_ARP_VALIDATE_ALL + 1) 469 #define BOND_ARP_FILTER_ACTIVE (BOND_ARP_VALIDATE_ACTIVE | \ 470 BOND_ARP_FILTER) 471 #define BOND_ARP_FILTER_BACKUP (BOND_ARP_VALIDATE_BACKUP | \ 472 BOND_ARP_FILTER) 473 474 #define BOND_SLAVE_NOTIFY_NOW true 475 #define BOND_SLAVE_NOTIFY_LATER false 476 477 static inline int slave_do_arp_validate(struct bonding *bond, 478 struct slave *slave) 479 { 480 return bond->params.arp_validate & (1 << bond_slave_state(slave)); 481 } 482 483 static inline int slave_do_arp_validate_only(struct bonding *bond) 484 { 485 return bond->params.arp_validate & BOND_ARP_FILTER; 486 } 487 488 static inline int bond_is_ip_target_ok(__be32 addr) 489 { 490 return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr); 491 } 492 493 /* Get the oldest arp which we've received on this slave for bond's 494 * arp_targets. 495 */ 496 static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond, 497 struct slave *slave) 498 { 499 int i = 1; 500 unsigned long ret = slave->target_last_arp_rx[0]; 501 502 for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++) 503 if (time_before(slave->target_last_arp_rx[i], ret)) 504 ret = slave->target_last_arp_rx[i]; 505 506 return ret; 507 } 508 509 static inline unsigned long slave_last_rx(struct bonding *bond, 510 struct slave *slave) 511 { 512 if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL) 513 return slave_oldest_target_arp_rx(bond, slave); 514 515 return slave->last_rx; 516 } 517 518 #ifdef CONFIG_NET_POLL_CONTROLLER 519 static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave, 520 struct sk_buff *skb) 521 { 522 return netpoll_send_skb(slave->np, skb); 523 } 524 #else 525 static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave, 526 struct sk_buff *skb) 527 { 528 BUG(); 529 return NETDEV_TX_OK; 530 } 531 #endif 532 533 static inline void bond_set_slave_inactive_flags(struct slave *slave, 534 bool notify) 535 { 536 if (!bond_is_lb(slave->bond)) 537 bond_set_slave_state(slave, BOND_STATE_BACKUP, notify); 538 if (!slave->bond->params.all_slaves_active) 539 slave->inactive = 1; 540 } 541 542 static inline void bond_set_slave_active_flags(struct slave *slave, 543 bool notify) 544 { 545 bond_set_slave_state(slave, BOND_STATE_ACTIVE, notify); 546 slave->inactive = 0; 547 } 548 549 static inline bool bond_is_slave_inactive(struct slave *slave) 550 { 551 return slave->inactive; 552 } 553 554 static inline void bond_propose_link_state(struct slave *slave, int state) 555 { 556 slave->link_new_state = state; 557 } 558 559 static inline void bond_commit_link_state(struct slave *slave, bool notify) 560 { 561 if (slave->link_new_state == BOND_LINK_NOCHANGE) 562 return; 563 564 slave->link = slave->link_new_state; 565 if (notify) { 566 bond_queue_slave_event(slave); 567 bond_lower_state_changed(slave); 568 slave->should_notify_link = 0; 569 } else { 570 if (slave->should_notify_link) 571 slave->should_notify_link = 0; 572 else 573 slave->should_notify_link = 1; 574 } 575 } 576 577 static inline void bond_set_slave_link_state(struct slave *slave, int state, 578 bool notify) 579 { 580 bond_propose_link_state(slave, state); 581 bond_commit_link_state(slave, notify); 582 } 583 584 static inline void bond_slave_link_notify(struct bonding *bond) 585 { 586 struct list_head *iter; 587 struct slave *tmp; 588 589 bond_for_each_slave(bond, tmp, iter) { 590 if (tmp->should_notify_link) { 591 bond_queue_slave_event(tmp); 592 bond_lower_state_changed(tmp); 593 tmp->should_notify_link = 0; 594 } 595 } 596 } 597 598 static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local) 599 { 600 struct in_device *in_dev; 601 __be32 addr = 0; 602 603 rcu_read_lock(); 604 in_dev = __in_dev_get_rcu(dev); 605 606 if (in_dev) 607 addr = inet_confirm_addr(dev_net(dev), in_dev, dst, local, 608 RT_SCOPE_HOST); 609 rcu_read_unlock(); 610 return addr; 611 } 612 613 struct bond_net { 614 struct net *net; /* Associated network namespace */ 615 struct list_head dev_list; 616 #ifdef CONFIG_PROC_FS 617 struct proc_dir_entry *proc_dir; 618 #endif 619 struct class_attribute class_attr_bonding_masters; 620 }; 621 622 int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond, struct slave *slave); 623 netdev_tx_t bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev); 624 int bond_create(struct net *net, const char *name); 625 int bond_create_sysfs(struct bond_net *net); 626 void bond_destroy_sysfs(struct bond_net *net); 627 void bond_prepare_sysfs_group(struct bonding *bond); 628 int bond_sysfs_slave_add(struct slave *slave); 629 void bond_sysfs_slave_del(struct slave *slave); 630 int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev, 631 struct netlink_ext_ack *extack); 632 int bond_release(struct net_device *bond_dev, struct net_device *slave_dev); 633 u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb); 634 int bond_set_carrier(struct bonding *bond); 635 void bond_select_active_slave(struct bonding *bond); 636 void bond_change_active_slave(struct bonding *bond, struct slave *new_active); 637 void bond_create_debugfs(void); 638 void bond_destroy_debugfs(void); 639 void bond_debug_register(struct bonding *bond); 640 void bond_debug_unregister(struct bonding *bond); 641 void bond_debug_reregister(struct bonding *bond); 642 const char *bond_mode_name(int mode); 643 void bond_setup(struct net_device *bond_dev); 644 unsigned int bond_get_num_tx_queues(void); 645 int bond_netlink_init(void); 646 void bond_netlink_fini(void); 647 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond); 648 const char *bond_slave_link_status(s8 link); 649 struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev, 650 struct net_device *end_dev, 651 int level); 652 int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave); 653 void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay); 654 void bond_work_init_all(struct bonding *bond); 655 656 #ifdef CONFIG_PROC_FS 657 void bond_create_proc_entry(struct bonding *bond); 658 void bond_remove_proc_entry(struct bonding *bond); 659 void bond_create_proc_dir(struct bond_net *bn); 660 void bond_destroy_proc_dir(struct bond_net *bn); 661 #else 662 static inline void bond_create_proc_entry(struct bonding *bond) 663 { 664 } 665 666 static inline void bond_remove_proc_entry(struct bonding *bond) 667 { 668 } 669 670 static inline void bond_create_proc_dir(struct bond_net *bn) 671 { 672 } 673 674 static inline void bond_destroy_proc_dir(struct bond_net *bn) 675 { 676 } 677 #endif 678 679 static inline struct slave *bond_slave_has_mac(struct bonding *bond, 680 const u8 *mac) 681 { 682 struct list_head *iter; 683 struct slave *tmp; 684 685 bond_for_each_slave(bond, tmp, iter) 686 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr)) 687 return tmp; 688 689 return NULL; 690 } 691 692 /* Caller must hold rcu_read_lock() for read */ 693 static inline struct slave *bond_slave_has_mac_rcu(struct bonding *bond, 694 const u8 *mac) 695 { 696 struct list_head *iter; 697 struct slave *tmp; 698 699 bond_for_each_slave_rcu(bond, tmp, iter) 700 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr)) 701 return tmp; 702 703 return NULL; 704 } 705 706 /* Caller must hold rcu_read_lock() for read */ 707 static inline bool bond_slave_has_mac_rx(struct bonding *bond, const u8 *mac) 708 { 709 struct list_head *iter; 710 struct slave *tmp; 711 struct netdev_hw_addr *ha; 712 713 bond_for_each_slave_rcu(bond, tmp, iter) 714 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr)) 715 return true; 716 717 if (netdev_uc_empty(bond->dev)) 718 return false; 719 720 netdev_for_each_uc_addr(ha, bond->dev) 721 if (ether_addr_equal_64bits(mac, ha->addr)) 722 return true; 723 724 return false; 725 } 726 727 /* Check if the ip is present in arp ip list, or first free slot if ip == 0 728 * Returns -1 if not found, index if found 729 */ 730 static inline int bond_get_targets_ip(__be32 *targets, __be32 ip) 731 { 732 int i; 733 734 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) 735 if (targets[i] == ip) 736 return i; 737 else if (targets[i] == 0) 738 break; 739 740 return -1; 741 } 742 743 /* exported from bond_main.c */ 744 extern unsigned int bond_net_id; 745 extern const struct bond_parm_tbl bond_lacp_tbl[]; 746 extern const struct bond_parm_tbl xmit_hashtype_tbl[]; 747 extern const struct bond_parm_tbl arp_validate_tbl[]; 748 extern const struct bond_parm_tbl arp_all_targets_tbl[]; 749 extern const struct bond_parm_tbl fail_over_mac_tbl[]; 750 extern const struct bond_parm_tbl pri_reselect_tbl[]; 751 extern struct bond_parm_tbl ad_select_tbl[]; 752 753 /* exported from bond_netlink.c */ 754 extern struct rtnl_link_ops bond_link_ops; 755 756 /* exported from bond_sysfs_slave.c */ 757 extern const struct sysfs_ops slave_sysfs_ops; 758 759 static inline netdev_tx_t bond_tx_drop(struct net_device *dev, struct sk_buff *skb) 760 { 761 atomic_long_inc(&dev->tx_dropped); 762 dev_kfree_skb_any(skb); 763 return NET_XMIT_DROP; 764 } 765 766 #endif /* _NET_BONDING_H */ 767