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