1 /* 2 * drivers/net/team/team.c - Network team device driver 3 * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 */ 10 11 #include <linux/kernel.h> 12 #include <linux/types.h> 13 #include <linux/module.h> 14 #include <linux/init.h> 15 #include <linux/slab.h> 16 #include <linux/rcupdate.h> 17 #include <linux/errno.h> 18 #include <linux/ctype.h> 19 #include <linux/notifier.h> 20 #include <linux/netdevice.h> 21 #include <linux/netpoll.h> 22 #include <linux/if_vlan.h> 23 #include <linux/if_arp.h> 24 #include <linux/socket.h> 25 #include <linux/etherdevice.h> 26 #include <linux/rtnetlink.h> 27 #include <net/rtnetlink.h> 28 #include <net/genetlink.h> 29 #include <net/netlink.h> 30 #include <net/sch_generic.h> 31 #include <generated/utsrelease.h> 32 #include <linux/if_team.h> 33 34 #define DRV_NAME "team" 35 36 37 /********** 38 * Helpers 39 **********/ 40 41 #define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT) 42 43 static struct team_port *team_port_get_rtnl(const struct net_device *dev) 44 { 45 struct team_port *port = rtnl_dereference(dev->rx_handler_data); 46 47 return team_port_exists(dev) ? port : NULL; 48 } 49 50 /* 51 * Since the ability to change device address for open port device is tested in 52 * team_port_add, this function can be called without control of return value 53 */ 54 static int __set_port_dev_addr(struct net_device *port_dev, 55 const unsigned char *dev_addr) 56 { 57 struct sockaddr_storage addr; 58 59 memcpy(addr.__data, dev_addr, port_dev->addr_len); 60 addr.ss_family = port_dev->type; 61 return dev_set_mac_address(port_dev, (struct sockaddr *)&addr, NULL); 62 } 63 64 static int team_port_set_orig_dev_addr(struct team_port *port) 65 { 66 return __set_port_dev_addr(port->dev, port->orig.dev_addr); 67 } 68 69 static int team_port_set_team_dev_addr(struct team *team, 70 struct team_port *port) 71 { 72 return __set_port_dev_addr(port->dev, team->dev->dev_addr); 73 } 74 75 int team_modeop_port_enter(struct team *team, struct team_port *port) 76 { 77 return team_port_set_team_dev_addr(team, port); 78 } 79 EXPORT_SYMBOL(team_modeop_port_enter); 80 81 void team_modeop_port_change_dev_addr(struct team *team, 82 struct team_port *port) 83 { 84 team_port_set_team_dev_addr(team, port); 85 } 86 EXPORT_SYMBOL(team_modeop_port_change_dev_addr); 87 88 static void team_lower_state_changed(struct team_port *port) 89 { 90 struct netdev_lag_lower_state_info info; 91 92 info.link_up = port->linkup; 93 info.tx_enabled = team_port_enabled(port); 94 netdev_lower_state_changed(port->dev, &info); 95 } 96 97 static void team_refresh_port_linkup(struct team_port *port) 98 { 99 bool new_linkup = port->user.linkup_enabled ? port->user.linkup : 100 port->state.linkup; 101 102 if (port->linkup != new_linkup) { 103 port->linkup = new_linkup; 104 team_lower_state_changed(port); 105 } 106 } 107 108 109 /******************* 110 * Options handling 111 *******************/ 112 113 struct team_option_inst { /* One for each option instance */ 114 struct list_head list; 115 struct list_head tmp_list; 116 struct team_option *option; 117 struct team_option_inst_info info; 118 bool changed; 119 bool removed; 120 }; 121 122 static struct team_option *__team_find_option(struct team *team, 123 const char *opt_name) 124 { 125 struct team_option *option; 126 127 list_for_each_entry(option, &team->option_list, list) { 128 if (strcmp(option->name, opt_name) == 0) 129 return option; 130 } 131 return NULL; 132 } 133 134 static void __team_option_inst_del(struct team_option_inst *opt_inst) 135 { 136 list_del(&opt_inst->list); 137 kfree(opt_inst); 138 } 139 140 static void __team_option_inst_del_option(struct team *team, 141 struct team_option *option) 142 { 143 struct team_option_inst *opt_inst, *tmp; 144 145 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) { 146 if (opt_inst->option == option) 147 __team_option_inst_del(opt_inst); 148 } 149 } 150 151 static int __team_option_inst_add(struct team *team, struct team_option *option, 152 struct team_port *port) 153 { 154 struct team_option_inst *opt_inst; 155 unsigned int array_size; 156 unsigned int i; 157 int err; 158 159 array_size = option->array_size; 160 if (!array_size) 161 array_size = 1; /* No array but still need one instance */ 162 163 for (i = 0; i < array_size; i++) { 164 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL); 165 if (!opt_inst) 166 return -ENOMEM; 167 opt_inst->option = option; 168 opt_inst->info.port = port; 169 opt_inst->info.array_index = i; 170 opt_inst->changed = true; 171 opt_inst->removed = false; 172 list_add_tail(&opt_inst->list, &team->option_inst_list); 173 if (option->init) { 174 err = option->init(team, &opt_inst->info); 175 if (err) 176 return err; 177 } 178 179 } 180 return 0; 181 } 182 183 static int __team_option_inst_add_option(struct team *team, 184 struct team_option *option) 185 { 186 int err; 187 188 if (!option->per_port) { 189 err = __team_option_inst_add(team, option, NULL); 190 if (err) 191 goto inst_del_option; 192 } 193 return 0; 194 195 inst_del_option: 196 __team_option_inst_del_option(team, option); 197 return err; 198 } 199 200 static void __team_option_inst_mark_removed_option(struct team *team, 201 struct team_option *option) 202 { 203 struct team_option_inst *opt_inst; 204 205 list_for_each_entry(opt_inst, &team->option_inst_list, list) { 206 if (opt_inst->option == option) { 207 opt_inst->changed = true; 208 opt_inst->removed = true; 209 } 210 } 211 } 212 213 static void __team_option_inst_del_port(struct team *team, 214 struct team_port *port) 215 { 216 struct team_option_inst *opt_inst, *tmp; 217 218 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) { 219 if (opt_inst->option->per_port && 220 opt_inst->info.port == port) 221 __team_option_inst_del(opt_inst); 222 } 223 } 224 225 static int __team_option_inst_add_port(struct team *team, 226 struct team_port *port) 227 { 228 struct team_option *option; 229 int err; 230 231 list_for_each_entry(option, &team->option_list, list) { 232 if (!option->per_port) 233 continue; 234 err = __team_option_inst_add(team, option, port); 235 if (err) 236 goto inst_del_port; 237 } 238 return 0; 239 240 inst_del_port: 241 __team_option_inst_del_port(team, port); 242 return err; 243 } 244 245 static void __team_option_inst_mark_removed_port(struct team *team, 246 struct team_port *port) 247 { 248 struct team_option_inst *opt_inst; 249 250 list_for_each_entry(opt_inst, &team->option_inst_list, list) { 251 if (opt_inst->info.port == port) { 252 opt_inst->changed = true; 253 opt_inst->removed = true; 254 } 255 } 256 } 257 258 static int __team_options_register(struct team *team, 259 const struct team_option *option, 260 size_t option_count) 261 { 262 int i; 263 struct team_option **dst_opts; 264 int err; 265 266 dst_opts = kcalloc(option_count, sizeof(struct team_option *), 267 GFP_KERNEL); 268 if (!dst_opts) 269 return -ENOMEM; 270 for (i = 0; i < option_count; i++, option++) { 271 if (__team_find_option(team, option->name)) { 272 err = -EEXIST; 273 goto alloc_rollback; 274 } 275 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL); 276 if (!dst_opts[i]) { 277 err = -ENOMEM; 278 goto alloc_rollback; 279 } 280 } 281 282 for (i = 0; i < option_count; i++) { 283 err = __team_option_inst_add_option(team, dst_opts[i]); 284 if (err) 285 goto inst_rollback; 286 list_add_tail(&dst_opts[i]->list, &team->option_list); 287 } 288 289 kfree(dst_opts); 290 return 0; 291 292 inst_rollback: 293 for (i--; i >= 0; i--) 294 __team_option_inst_del_option(team, dst_opts[i]); 295 296 i = option_count - 1; 297 alloc_rollback: 298 for (i--; i >= 0; i--) 299 kfree(dst_opts[i]); 300 301 kfree(dst_opts); 302 return err; 303 } 304 305 static void __team_options_mark_removed(struct team *team, 306 const struct team_option *option, 307 size_t option_count) 308 { 309 int i; 310 311 for (i = 0; i < option_count; i++, option++) { 312 struct team_option *del_opt; 313 314 del_opt = __team_find_option(team, option->name); 315 if (del_opt) 316 __team_option_inst_mark_removed_option(team, del_opt); 317 } 318 } 319 320 static void __team_options_unregister(struct team *team, 321 const struct team_option *option, 322 size_t option_count) 323 { 324 int i; 325 326 for (i = 0; i < option_count; i++, option++) { 327 struct team_option *del_opt; 328 329 del_opt = __team_find_option(team, option->name); 330 if (del_opt) { 331 __team_option_inst_del_option(team, del_opt); 332 list_del(&del_opt->list); 333 kfree(del_opt); 334 } 335 } 336 } 337 338 static void __team_options_change_check(struct team *team); 339 340 int team_options_register(struct team *team, 341 const struct team_option *option, 342 size_t option_count) 343 { 344 int err; 345 346 err = __team_options_register(team, option, option_count); 347 if (err) 348 return err; 349 __team_options_change_check(team); 350 return 0; 351 } 352 EXPORT_SYMBOL(team_options_register); 353 354 void team_options_unregister(struct team *team, 355 const struct team_option *option, 356 size_t option_count) 357 { 358 __team_options_mark_removed(team, option, option_count); 359 __team_options_change_check(team); 360 __team_options_unregister(team, option, option_count); 361 } 362 EXPORT_SYMBOL(team_options_unregister); 363 364 static int team_option_get(struct team *team, 365 struct team_option_inst *opt_inst, 366 struct team_gsetter_ctx *ctx) 367 { 368 if (!opt_inst->option->getter) 369 return -EOPNOTSUPP; 370 return opt_inst->option->getter(team, ctx); 371 } 372 373 static int team_option_set(struct team *team, 374 struct team_option_inst *opt_inst, 375 struct team_gsetter_ctx *ctx) 376 { 377 if (!opt_inst->option->setter) 378 return -EOPNOTSUPP; 379 return opt_inst->option->setter(team, ctx); 380 } 381 382 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info) 383 { 384 struct team_option_inst *opt_inst; 385 386 opt_inst = container_of(opt_inst_info, struct team_option_inst, info); 387 opt_inst->changed = true; 388 } 389 EXPORT_SYMBOL(team_option_inst_set_change); 390 391 void team_options_change_check(struct team *team) 392 { 393 __team_options_change_check(team); 394 } 395 EXPORT_SYMBOL(team_options_change_check); 396 397 398 /**************** 399 * Mode handling 400 ****************/ 401 402 static LIST_HEAD(mode_list); 403 static DEFINE_SPINLOCK(mode_list_lock); 404 405 struct team_mode_item { 406 struct list_head list; 407 const struct team_mode *mode; 408 }; 409 410 static struct team_mode_item *__find_mode(const char *kind) 411 { 412 struct team_mode_item *mitem; 413 414 list_for_each_entry(mitem, &mode_list, list) { 415 if (strcmp(mitem->mode->kind, kind) == 0) 416 return mitem; 417 } 418 return NULL; 419 } 420 421 static bool is_good_mode_name(const char *name) 422 { 423 while (*name != '\0') { 424 if (!isalpha(*name) && !isdigit(*name) && *name != '_') 425 return false; 426 name++; 427 } 428 return true; 429 } 430 431 int team_mode_register(const struct team_mode *mode) 432 { 433 int err = 0; 434 struct team_mode_item *mitem; 435 436 if (!is_good_mode_name(mode->kind) || 437 mode->priv_size > TEAM_MODE_PRIV_SIZE) 438 return -EINVAL; 439 440 mitem = kmalloc(sizeof(*mitem), GFP_KERNEL); 441 if (!mitem) 442 return -ENOMEM; 443 444 spin_lock(&mode_list_lock); 445 if (__find_mode(mode->kind)) { 446 err = -EEXIST; 447 kfree(mitem); 448 goto unlock; 449 } 450 mitem->mode = mode; 451 list_add_tail(&mitem->list, &mode_list); 452 unlock: 453 spin_unlock(&mode_list_lock); 454 return err; 455 } 456 EXPORT_SYMBOL(team_mode_register); 457 458 void team_mode_unregister(const struct team_mode *mode) 459 { 460 struct team_mode_item *mitem; 461 462 spin_lock(&mode_list_lock); 463 mitem = __find_mode(mode->kind); 464 if (mitem) { 465 list_del_init(&mitem->list); 466 kfree(mitem); 467 } 468 spin_unlock(&mode_list_lock); 469 } 470 EXPORT_SYMBOL(team_mode_unregister); 471 472 static const struct team_mode *team_mode_get(const char *kind) 473 { 474 struct team_mode_item *mitem; 475 const struct team_mode *mode = NULL; 476 477 spin_lock(&mode_list_lock); 478 mitem = __find_mode(kind); 479 if (!mitem) { 480 spin_unlock(&mode_list_lock); 481 request_module("team-mode-%s", kind); 482 spin_lock(&mode_list_lock); 483 mitem = __find_mode(kind); 484 } 485 if (mitem) { 486 mode = mitem->mode; 487 if (!try_module_get(mode->owner)) 488 mode = NULL; 489 } 490 491 spin_unlock(&mode_list_lock); 492 return mode; 493 } 494 495 static void team_mode_put(const struct team_mode *mode) 496 { 497 module_put(mode->owner); 498 } 499 500 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb) 501 { 502 dev_kfree_skb_any(skb); 503 return false; 504 } 505 506 static rx_handler_result_t team_dummy_receive(struct team *team, 507 struct team_port *port, 508 struct sk_buff *skb) 509 { 510 return RX_HANDLER_ANOTHER; 511 } 512 513 static const struct team_mode __team_no_mode = { 514 .kind = "*NOMODE*", 515 }; 516 517 static bool team_is_mode_set(struct team *team) 518 { 519 return team->mode != &__team_no_mode; 520 } 521 522 static void team_set_no_mode(struct team *team) 523 { 524 team->user_carrier_enabled = false; 525 team->mode = &__team_no_mode; 526 } 527 528 static void team_adjust_ops(struct team *team) 529 { 530 /* 531 * To avoid checks in rx/tx skb paths, ensure here that non-null and 532 * correct ops are always set. 533 */ 534 535 if (!team->en_port_count || !team_is_mode_set(team) || 536 !team->mode->ops->transmit) 537 team->ops.transmit = team_dummy_transmit; 538 else 539 team->ops.transmit = team->mode->ops->transmit; 540 541 if (!team->en_port_count || !team_is_mode_set(team) || 542 !team->mode->ops->receive) 543 team->ops.receive = team_dummy_receive; 544 else 545 team->ops.receive = team->mode->ops->receive; 546 } 547 548 /* 549 * We can benefit from the fact that it's ensured no port is present 550 * at the time of mode change. Therefore no packets are in fly so there's no 551 * need to set mode operations in any special way. 552 */ 553 static int __team_change_mode(struct team *team, 554 const struct team_mode *new_mode) 555 { 556 /* Check if mode was previously set and do cleanup if so */ 557 if (team_is_mode_set(team)) { 558 void (*exit_op)(struct team *team) = team->ops.exit; 559 560 /* Clear ops area so no callback is called any longer */ 561 memset(&team->ops, 0, sizeof(struct team_mode_ops)); 562 team_adjust_ops(team); 563 564 if (exit_op) 565 exit_op(team); 566 team_mode_put(team->mode); 567 team_set_no_mode(team); 568 /* zero private data area */ 569 memset(&team->mode_priv, 0, 570 sizeof(struct team) - offsetof(struct team, mode_priv)); 571 } 572 573 if (!new_mode) 574 return 0; 575 576 if (new_mode->ops->init) { 577 int err; 578 579 err = new_mode->ops->init(team); 580 if (err) 581 return err; 582 } 583 584 team->mode = new_mode; 585 memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops)); 586 team_adjust_ops(team); 587 588 return 0; 589 } 590 591 static int team_change_mode(struct team *team, const char *kind) 592 { 593 const struct team_mode *new_mode; 594 struct net_device *dev = team->dev; 595 int err; 596 597 if (!list_empty(&team->port_list)) { 598 netdev_err(dev, "No ports can be present during mode change\n"); 599 return -EBUSY; 600 } 601 602 if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) { 603 netdev_err(dev, "Unable to change to the same mode the team is in\n"); 604 return -EINVAL; 605 } 606 607 new_mode = team_mode_get(kind); 608 if (!new_mode) { 609 netdev_err(dev, "Mode \"%s\" not found\n", kind); 610 return -EINVAL; 611 } 612 613 err = __team_change_mode(team, new_mode); 614 if (err) { 615 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind); 616 team_mode_put(new_mode); 617 return err; 618 } 619 620 netdev_info(dev, "Mode changed to \"%s\"\n", kind); 621 return 0; 622 } 623 624 625 /********************* 626 * Peers notification 627 *********************/ 628 629 static void team_notify_peers_work(struct work_struct *work) 630 { 631 struct team *team; 632 int val; 633 634 team = container_of(work, struct team, notify_peers.dw.work); 635 636 if (!rtnl_trylock()) { 637 schedule_delayed_work(&team->notify_peers.dw, 0); 638 return; 639 } 640 val = atomic_dec_if_positive(&team->notify_peers.count_pending); 641 if (val < 0) { 642 rtnl_unlock(); 643 return; 644 } 645 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev); 646 rtnl_unlock(); 647 if (val) 648 schedule_delayed_work(&team->notify_peers.dw, 649 msecs_to_jiffies(team->notify_peers.interval)); 650 } 651 652 static void team_notify_peers(struct team *team) 653 { 654 if (!team->notify_peers.count || !netif_running(team->dev)) 655 return; 656 atomic_add(team->notify_peers.count, &team->notify_peers.count_pending); 657 schedule_delayed_work(&team->notify_peers.dw, 0); 658 } 659 660 static void team_notify_peers_init(struct team *team) 661 { 662 INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work); 663 } 664 665 static void team_notify_peers_fini(struct team *team) 666 { 667 cancel_delayed_work_sync(&team->notify_peers.dw); 668 } 669 670 671 /******************************* 672 * Send multicast group rejoins 673 *******************************/ 674 675 static void team_mcast_rejoin_work(struct work_struct *work) 676 { 677 struct team *team; 678 int val; 679 680 team = container_of(work, struct team, mcast_rejoin.dw.work); 681 682 if (!rtnl_trylock()) { 683 schedule_delayed_work(&team->mcast_rejoin.dw, 0); 684 return; 685 } 686 val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending); 687 if (val < 0) { 688 rtnl_unlock(); 689 return; 690 } 691 call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev); 692 rtnl_unlock(); 693 if (val) 694 schedule_delayed_work(&team->mcast_rejoin.dw, 695 msecs_to_jiffies(team->mcast_rejoin.interval)); 696 } 697 698 static void team_mcast_rejoin(struct team *team) 699 { 700 if (!team->mcast_rejoin.count || !netif_running(team->dev)) 701 return; 702 atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending); 703 schedule_delayed_work(&team->mcast_rejoin.dw, 0); 704 } 705 706 static void team_mcast_rejoin_init(struct team *team) 707 { 708 INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work); 709 } 710 711 static void team_mcast_rejoin_fini(struct team *team) 712 { 713 cancel_delayed_work_sync(&team->mcast_rejoin.dw); 714 } 715 716 717 /************************ 718 * Rx path frame handler 719 ************************/ 720 721 /* note: already called with rcu_read_lock */ 722 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb) 723 { 724 struct sk_buff *skb = *pskb; 725 struct team_port *port; 726 struct team *team; 727 rx_handler_result_t res; 728 729 skb = skb_share_check(skb, GFP_ATOMIC); 730 if (!skb) 731 return RX_HANDLER_CONSUMED; 732 733 *pskb = skb; 734 735 port = team_port_get_rcu(skb->dev); 736 team = port->team; 737 if (!team_port_enabled(port)) { 738 /* allow exact match delivery for disabled ports */ 739 res = RX_HANDLER_EXACT; 740 } else { 741 res = team->ops.receive(team, port, skb); 742 } 743 if (res == RX_HANDLER_ANOTHER) { 744 struct team_pcpu_stats *pcpu_stats; 745 746 pcpu_stats = this_cpu_ptr(team->pcpu_stats); 747 u64_stats_update_begin(&pcpu_stats->syncp); 748 pcpu_stats->rx_packets++; 749 pcpu_stats->rx_bytes += skb->len; 750 if (skb->pkt_type == PACKET_MULTICAST) 751 pcpu_stats->rx_multicast++; 752 u64_stats_update_end(&pcpu_stats->syncp); 753 754 skb->dev = team->dev; 755 } else if (res == RX_HANDLER_EXACT) { 756 this_cpu_inc(team->pcpu_stats->rx_nohandler); 757 } else { 758 this_cpu_inc(team->pcpu_stats->rx_dropped); 759 } 760 761 return res; 762 } 763 764 765 /************************************* 766 * Multiqueue Tx port select override 767 *************************************/ 768 769 static int team_queue_override_init(struct team *team) 770 { 771 struct list_head *listarr; 772 unsigned int queue_cnt = team->dev->num_tx_queues - 1; 773 unsigned int i; 774 775 if (!queue_cnt) 776 return 0; 777 listarr = kmalloc_array(queue_cnt, sizeof(struct list_head), 778 GFP_KERNEL); 779 if (!listarr) 780 return -ENOMEM; 781 team->qom_lists = listarr; 782 for (i = 0; i < queue_cnt; i++) 783 INIT_LIST_HEAD(listarr++); 784 return 0; 785 } 786 787 static void team_queue_override_fini(struct team *team) 788 { 789 kfree(team->qom_lists); 790 } 791 792 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id) 793 { 794 return &team->qom_lists[queue_id - 1]; 795 } 796 797 /* 798 * note: already called with rcu_read_lock 799 */ 800 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb) 801 { 802 struct list_head *qom_list; 803 struct team_port *port; 804 805 if (!team->queue_override_enabled || !skb->queue_mapping) 806 return false; 807 qom_list = __team_get_qom_list(team, skb->queue_mapping); 808 list_for_each_entry_rcu(port, qom_list, qom_list) { 809 if (!team_dev_queue_xmit(team, port, skb)) 810 return true; 811 } 812 return false; 813 } 814 815 static void __team_queue_override_port_del(struct team *team, 816 struct team_port *port) 817 { 818 if (!port->queue_id) 819 return; 820 list_del_rcu(&port->qom_list); 821 } 822 823 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port, 824 struct team_port *cur) 825 { 826 if (port->priority < cur->priority) 827 return true; 828 if (port->priority > cur->priority) 829 return false; 830 if (port->index < cur->index) 831 return true; 832 return false; 833 } 834 835 static void __team_queue_override_port_add(struct team *team, 836 struct team_port *port) 837 { 838 struct team_port *cur; 839 struct list_head *qom_list; 840 struct list_head *node; 841 842 if (!port->queue_id) 843 return; 844 qom_list = __team_get_qom_list(team, port->queue_id); 845 node = qom_list; 846 list_for_each_entry(cur, qom_list, qom_list) { 847 if (team_queue_override_port_has_gt_prio_than(port, cur)) 848 break; 849 node = &cur->qom_list; 850 } 851 list_add_tail_rcu(&port->qom_list, node); 852 } 853 854 static void __team_queue_override_enabled_check(struct team *team) 855 { 856 struct team_port *port; 857 bool enabled = false; 858 859 list_for_each_entry(port, &team->port_list, list) { 860 if (port->queue_id) { 861 enabled = true; 862 break; 863 } 864 } 865 if (enabled == team->queue_override_enabled) 866 return; 867 netdev_dbg(team->dev, "%s queue override\n", 868 enabled ? "Enabling" : "Disabling"); 869 team->queue_override_enabled = enabled; 870 } 871 872 static void team_queue_override_port_prio_changed(struct team *team, 873 struct team_port *port) 874 { 875 if (!port->queue_id || team_port_enabled(port)) 876 return; 877 __team_queue_override_port_del(team, port); 878 __team_queue_override_port_add(team, port); 879 __team_queue_override_enabled_check(team); 880 } 881 882 static void team_queue_override_port_change_queue_id(struct team *team, 883 struct team_port *port, 884 u16 new_queue_id) 885 { 886 if (team_port_enabled(port)) { 887 __team_queue_override_port_del(team, port); 888 port->queue_id = new_queue_id; 889 __team_queue_override_port_add(team, port); 890 __team_queue_override_enabled_check(team); 891 } else { 892 port->queue_id = new_queue_id; 893 } 894 } 895 896 static void team_queue_override_port_add(struct team *team, 897 struct team_port *port) 898 { 899 __team_queue_override_port_add(team, port); 900 __team_queue_override_enabled_check(team); 901 } 902 903 static void team_queue_override_port_del(struct team *team, 904 struct team_port *port) 905 { 906 __team_queue_override_port_del(team, port); 907 __team_queue_override_enabled_check(team); 908 } 909 910 911 /**************** 912 * Port handling 913 ****************/ 914 915 static bool team_port_find(const struct team *team, 916 const struct team_port *port) 917 { 918 struct team_port *cur; 919 920 list_for_each_entry(cur, &team->port_list, list) 921 if (cur == port) 922 return true; 923 return false; 924 } 925 926 /* 927 * Enable/disable port by adding to enabled port hashlist and setting 928 * port->index (Might be racy so reader could see incorrect ifindex when 929 * processing a flying packet, but that is not a problem). Write guarded 930 * by team->lock. 931 */ 932 static void team_port_enable(struct team *team, 933 struct team_port *port) 934 { 935 if (team_port_enabled(port)) 936 return; 937 port->index = team->en_port_count++; 938 hlist_add_head_rcu(&port->hlist, 939 team_port_index_hash(team, port->index)); 940 team_adjust_ops(team); 941 team_queue_override_port_add(team, port); 942 if (team->ops.port_enabled) 943 team->ops.port_enabled(team, port); 944 team_notify_peers(team); 945 team_mcast_rejoin(team); 946 team_lower_state_changed(port); 947 } 948 949 static void __reconstruct_port_hlist(struct team *team, int rm_index) 950 { 951 int i; 952 struct team_port *port; 953 954 for (i = rm_index + 1; i < team->en_port_count; i++) { 955 port = team_get_port_by_index(team, i); 956 hlist_del_rcu(&port->hlist); 957 port->index--; 958 hlist_add_head_rcu(&port->hlist, 959 team_port_index_hash(team, port->index)); 960 } 961 } 962 963 static void team_port_disable(struct team *team, 964 struct team_port *port) 965 { 966 if (!team_port_enabled(port)) 967 return; 968 if (team->ops.port_disabled) 969 team->ops.port_disabled(team, port); 970 hlist_del_rcu(&port->hlist); 971 __reconstruct_port_hlist(team, port->index); 972 port->index = -1; 973 team->en_port_count--; 974 team_queue_override_port_del(team, port); 975 team_adjust_ops(team); 976 team_lower_state_changed(port); 977 } 978 979 #define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \ 980 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \ 981 NETIF_F_HIGHDMA | NETIF_F_LRO) 982 983 #define TEAM_ENC_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \ 984 NETIF_F_RXCSUM | NETIF_F_ALL_TSO) 985 986 static void __team_compute_features(struct team *team) 987 { 988 struct team_port *port; 989 netdev_features_t vlan_features = TEAM_VLAN_FEATURES & 990 NETIF_F_ALL_FOR_ALL; 991 netdev_features_t enc_features = TEAM_ENC_FEATURES; 992 unsigned short max_hard_header_len = ETH_HLEN; 993 unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE | 994 IFF_XMIT_DST_RELEASE_PERM; 995 996 list_for_each_entry(port, &team->port_list, list) { 997 vlan_features = netdev_increment_features(vlan_features, 998 port->dev->vlan_features, 999 TEAM_VLAN_FEATURES); 1000 enc_features = 1001 netdev_increment_features(enc_features, 1002 port->dev->hw_enc_features, 1003 TEAM_ENC_FEATURES); 1004 1005 1006 dst_release_flag &= port->dev->priv_flags; 1007 if (port->dev->hard_header_len > max_hard_header_len) 1008 max_hard_header_len = port->dev->hard_header_len; 1009 } 1010 1011 team->dev->vlan_features = vlan_features; 1012 team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL | 1013 NETIF_F_GSO_UDP_L4; 1014 team->dev->hard_header_len = max_hard_header_len; 1015 1016 team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; 1017 if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM)) 1018 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE; 1019 } 1020 1021 static void team_compute_features(struct team *team) 1022 { 1023 mutex_lock(&team->lock); 1024 __team_compute_features(team); 1025 mutex_unlock(&team->lock); 1026 netdev_change_features(team->dev); 1027 } 1028 1029 static int team_port_enter(struct team *team, struct team_port *port) 1030 { 1031 int err = 0; 1032 1033 dev_hold(team->dev); 1034 if (team->ops.port_enter) { 1035 err = team->ops.port_enter(team, port); 1036 if (err) { 1037 netdev_err(team->dev, "Device %s failed to enter team mode\n", 1038 port->dev->name); 1039 goto err_port_enter; 1040 } 1041 } 1042 1043 return 0; 1044 1045 err_port_enter: 1046 dev_put(team->dev); 1047 1048 return err; 1049 } 1050 1051 static void team_port_leave(struct team *team, struct team_port *port) 1052 { 1053 if (team->ops.port_leave) 1054 team->ops.port_leave(team, port); 1055 dev_put(team->dev); 1056 } 1057 1058 #ifdef CONFIG_NET_POLL_CONTROLLER 1059 static int __team_port_enable_netpoll(struct team_port *port) 1060 { 1061 struct netpoll *np; 1062 int err; 1063 1064 np = kzalloc(sizeof(*np), GFP_KERNEL); 1065 if (!np) 1066 return -ENOMEM; 1067 1068 err = __netpoll_setup(np, port->dev); 1069 if (err) { 1070 kfree(np); 1071 return err; 1072 } 1073 port->np = np; 1074 return err; 1075 } 1076 1077 static int team_port_enable_netpoll(struct team_port *port) 1078 { 1079 if (!port->team->dev->npinfo) 1080 return 0; 1081 1082 return __team_port_enable_netpoll(port); 1083 } 1084 1085 static void team_port_disable_netpoll(struct team_port *port) 1086 { 1087 struct netpoll *np = port->np; 1088 1089 if (!np) 1090 return; 1091 port->np = NULL; 1092 1093 __netpoll_free(np); 1094 } 1095 #else 1096 static int team_port_enable_netpoll(struct team_port *port) 1097 { 1098 return 0; 1099 } 1100 static void team_port_disable_netpoll(struct team_port *port) 1101 { 1102 } 1103 #endif 1104 1105 static int team_upper_dev_link(struct team *team, struct team_port *port, 1106 struct netlink_ext_ack *extack) 1107 { 1108 struct netdev_lag_upper_info lag_upper_info; 1109 int err; 1110 1111 lag_upper_info.tx_type = team->mode->lag_tx_type; 1112 lag_upper_info.hash_type = NETDEV_LAG_HASH_UNKNOWN; 1113 err = netdev_master_upper_dev_link(port->dev, team->dev, NULL, 1114 &lag_upper_info, extack); 1115 if (err) 1116 return err; 1117 port->dev->priv_flags |= IFF_TEAM_PORT; 1118 return 0; 1119 } 1120 1121 static void team_upper_dev_unlink(struct team *team, struct team_port *port) 1122 { 1123 netdev_upper_dev_unlink(port->dev, team->dev); 1124 port->dev->priv_flags &= ~IFF_TEAM_PORT; 1125 } 1126 1127 static void __team_port_change_port_added(struct team_port *port, bool linkup); 1128 static int team_dev_type_check_change(struct net_device *dev, 1129 struct net_device *port_dev); 1130 1131 static int team_port_add(struct team *team, struct net_device *port_dev, 1132 struct netlink_ext_ack *extack) 1133 { 1134 struct net_device *dev = team->dev; 1135 struct team_port *port; 1136 char *portname = port_dev->name; 1137 int err; 1138 1139 if (port_dev->flags & IFF_LOOPBACK) { 1140 NL_SET_ERR_MSG(extack, "Loopback device can't be added as a team port"); 1141 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n", 1142 portname); 1143 return -EINVAL; 1144 } 1145 1146 if (team_port_exists(port_dev)) { 1147 NL_SET_ERR_MSG(extack, "Device is already a port of a team device"); 1148 netdev_err(dev, "Device %s is already a port " 1149 "of a team device\n", portname); 1150 return -EBUSY; 1151 } 1152 1153 if (dev == port_dev) { 1154 NL_SET_ERR_MSG(extack, "Cannot enslave team device to itself"); 1155 netdev_err(dev, "Cannot enslave team device to itself\n"); 1156 return -EINVAL; 1157 } 1158 1159 if (port_dev->features & NETIF_F_VLAN_CHALLENGED && 1160 vlan_uses_dev(dev)) { 1161 NL_SET_ERR_MSG(extack, "Device is VLAN challenged and team device has VLAN set up"); 1162 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n", 1163 portname); 1164 return -EPERM; 1165 } 1166 1167 err = team_dev_type_check_change(dev, port_dev); 1168 if (err) 1169 return err; 1170 1171 if (port_dev->flags & IFF_UP) { 1172 NL_SET_ERR_MSG(extack, "Device is up. Set it down before adding it as a team port"); 1173 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n", 1174 portname); 1175 return -EBUSY; 1176 } 1177 1178 port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size, 1179 GFP_KERNEL); 1180 if (!port) 1181 return -ENOMEM; 1182 1183 port->dev = port_dev; 1184 port->team = team; 1185 INIT_LIST_HEAD(&port->qom_list); 1186 1187 port->orig.mtu = port_dev->mtu; 1188 err = dev_set_mtu(port_dev, dev->mtu); 1189 if (err) { 1190 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err); 1191 goto err_set_mtu; 1192 } 1193 1194 memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len); 1195 1196 err = team_port_enter(team, port); 1197 if (err) { 1198 netdev_err(dev, "Device %s failed to enter team mode\n", 1199 portname); 1200 goto err_port_enter; 1201 } 1202 1203 err = dev_open(port_dev, extack); 1204 if (err) { 1205 netdev_dbg(dev, "Device %s opening failed\n", 1206 portname); 1207 goto err_dev_open; 1208 } 1209 1210 err = vlan_vids_add_by_dev(port_dev, dev); 1211 if (err) { 1212 netdev_err(dev, "Failed to add vlan ids to device %s\n", 1213 portname); 1214 goto err_vids_add; 1215 } 1216 1217 err = team_port_enable_netpoll(port); 1218 if (err) { 1219 netdev_err(dev, "Failed to enable netpoll on device %s\n", 1220 portname); 1221 goto err_enable_netpoll; 1222 } 1223 1224 if (!(dev->features & NETIF_F_LRO)) 1225 dev_disable_lro(port_dev); 1226 1227 err = netdev_rx_handler_register(port_dev, team_handle_frame, 1228 port); 1229 if (err) { 1230 netdev_err(dev, "Device %s failed to register rx_handler\n", 1231 portname); 1232 goto err_handler_register; 1233 } 1234 1235 err = team_upper_dev_link(team, port, extack); 1236 if (err) { 1237 netdev_err(dev, "Device %s failed to set upper link\n", 1238 portname); 1239 goto err_set_upper_link; 1240 } 1241 1242 err = __team_option_inst_add_port(team, port); 1243 if (err) { 1244 netdev_err(dev, "Device %s failed to add per-port options\n", 1245 portname); 1246 goto err_option_port_add; 1247 } 1248 1249 /* set promiscuity level to new slave */ 1250 if (dev->flags & IFF_PROMISC) { 1251 err = dev_set_promiscuity(port_dev, 1); 1252 if (err) 1253 goto err_set_slave_promisc; 1254 } 1255 1256 /* set allmulti level to new slave */ 1257 if (dev->flags & IFF_ALLMULTI) { 1258 err = dev_set_allmulti(port_dev, 1); 1259 if (err) { 1260 if (dev->flags & IFF_PROMISC) 1261 dev_set_promiscuity(port_dev, -1); 1262 goto err_set_slave_promisc; 1263 } 1264 } 1265 1266 netif_addr_lock_bh(dev); 1267 dev_uc_sync_multiple(port_dev, dev); 1268 dev_mc_sync_multiple(port_dev, dev); 1269 netif_addr_unlock_bh(dev); 1270 1271 port->index = -1; 1272 list_add_tail_rcu(&port->list, &team->port_list); 1273 team_port_enable(team, port); 1274 __team_compute_features(team); 1275 __team_port_change_port_added(port, !!netif_oper_up(port_dev)); 1276 __team_options_change_check(team); 1277 1278 netdev_info(dev, "Port device %s added\n", portname); 1279 1280 return 0; 1281 1282 err_set_slave_promisc: 1283 __team_option_inst_del_port(team, port); 1284 1285 err_option_port_add: 1286 team_upper_dev_unlink(team, port); 1287 1288 err_set_upper_link: 1289 netdev_rx_handler_unregister(port_dev); 1290 1291 err_handler_register: 1292 team_port_disable_netpoll(port); 1293 1294 err_enable_netpoll: 1295 vlan_vids_del_by_dev(port_dev, dev); 1296 1297 err_vids_add: 1298 dev_close(port_dev); 1299 1300 err_dev_open: 1301 team_port_leave(team, port); 1302 team_port_set_orig_dev_addr(port); 1303 1304 err_port_enter: 1305 dev_set_mtu(port_dev, port->orig.mtu); 1306 1307 err_set_mtu: 1308 kfree(port); 1309 1310 return err; 1311 } 1312 1313 static void __team_port_change_port_removed(struct team_port *port); 1314 1315 static int team_port_del(struct team *team, struct net_device *port_dev) 1316 { 1317 struct net_device *dev = team->dev; 1318 struct team_port *port; 1319 char *portname = port_dev->name; 1320 1321 port = team_port_get_rtnl(port_dev); 1322 if (!port || !team_port_find(team, port)) { 1323 netdev_err(dev, "Device %s does not act as a port of this team\n", 1324 portname); 1325 return -ENOENT; 1326 } 1327 1328 team_port_disable(team, port); 1329 list_del_rcu(&port->list); 1330 1331 if (dev->flags & IFF_PROMISC) 1332 dev_set_promiscuity(port_dev, -1); 1333 if (dev->flags & IFF_ALLMULTI) 1334 dev_set_allmulti(port_dev, -1); 1335 1336 team_upper_dev_unlink(team, port); 1337 netdev_rx_handler_unregister(port_dev); 1338 team_port_disable_netpoll(port); 1339 vlan_vids_del_by_dev(port_dev, dev); 1340 dev_uc_unsync(port_dev, dev); 1341 dev_mc_unsync(port_dev, dev); 1342 dev_close(port_dev); 1343 team_port_leave(team, port); 1344 1345 __team_option_inst_mark_removed_port(team, port); 1346 __team_options_change_check(team); 1347 __team_option_inst_del_port(team, port); 1348 __team_port_change_port_removed(port); 1349 1350 team_port_set_orig_dev_addr(port); 1351 dev_set_mtu(port_dev, port->orig.mtu); 1352 kfree_rcu(port, rcu); 1353 netdev_info(dev, "Port device %s removed\n", portname); 1354 __team_compute_features(team); 1355 1356 return 0; 1357 } 1358 1359 1360 /***************** 1361 * Net device ops 1362 *****************/ 1363 1364 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx) 1365 { 1366 ctx->data.str_val = team->mode->kind; 1367 return 0; 1368 } 1369 1370 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx) 1371 { 1372 return team_change_mode(team, ctx->data.str_val); 1373 } 1374 1375 static int team_notify_peers_count_get(struct team *team, 1376 struct team_gsetter_ctx *ctx) 1377 { 1378 ctx->data.u32_val = team->notify_peers.count; 1379 return 0; 1380 } 1381 1382 static int team_notify_peers_count_set(struct team *team, 1383 struct team_gsetter_ctx *ctx) 1384 { 1385 team->notify_peers.count = ctx->data.u32_val; 1386 return 0; 1387 } 1388 1389 static int team_notify_peers_interval_get(struct team *team, 1390 struct team_gsetter_ctx *ctx) 1391 { 1392 ctx->data.u32_val = team->notify_peers.interval; 1393 return 0; 1394 } 1395 1396 static int team_notify_peers_interval_set(struct team *team, 1397 struct team_gsetter_ctx *ctx) 1398 { 1399 team->notify_peers.interval = ctx->data.u32_val; 1400 return 0; 1401 } 1402 1403 static int team_mcast_rejoin_count_get(struct team *team, 1404 struct team_gsetter_ctx *ctx) 1405 { 1406 ctx->data.u32_val = team->mcast_rejoin.count; 1407 return 0; 1408 } 1409 1410 static int team_mcast_rejoin_count_set(struct team *team, 1411 struct team_gsetter_ctx *ctx) 1412 { 1413 team->mcast_rejoin.count = ctx->data.u32_val; 1414 return 0; 1415 } 1416 1417 static int team_mcast_rejoin_interval_get(struct team *team, 1418 struct team_gsetter_ctx *ctx) 1419 { 1420 ctx->data.u32_val = team->mcast_rejoin.interval; 1421 return 0; 1422 } 1423 1424 static int team_mcast_rejoin_interval_set(struct team *team, 1425 struct team_gsetter_ctx *ctx) 1426 { 1427 team->mcast_rejoin.interval = ctx->data.u32_val; 1428 return 0; 1429 } 1430 1431 static int team_port_en_option_get(struct team *team, 1432 struct team_gsetter_ctx *ctx) 1433 { 1434 struct team_port *port = ctx->info->port; 1435 1436 ctx->data.bool_val = team_port_enabled(port); 1437 return 0; 1438 } 1439 1440 static int team_port_en_option_set(struct team *team, 1441 struct team_gsetter_ctx *ctx) 1442 { 1443 struct team_port *port = ctx->info->port; 1444 1445 if (ctx->data.bool_val) 1446 team_port_enable(team, port); 1447 else 1448 team_port_disable(team, port); 1449 return 0; 1450 } 1451 1452 static int team_user_linkup_option_get(struct team *team, 1453 struct team_gsetter_ctx *ctx) 1454 { 1455 struct team_port *port = ctx->info->port; 1456 1457 ctx->data.bool_val = port->user.linkup; 1458 return 0; 1459 } 1460 1461 static void __team_carrier_check(struct team *team); 1462 1463 static int team_user_linkup_option_set(struct team *team, 1464 struct team_gsetter_ctx *ctx) 1465 { 1466 struct team_port *port = ctx->info->port; 1467 1468 port->user.linkup = ctx->data.bool_val; 1469 team_refresh_port_linkup(port); 1470 __team_carrier_check(port->team); 1471 return 0; 1472 } 1473 1474 static int team_user_linkup_en_option_get(struct team *team, 1475 struct team_gsetter_ctx *ctx) 1476 { 1477 struct team_port *port = ctx->info->port; 1478 1479 ctx->data.bool_val = port->user.linkup_enabled; 1480 return 0; 1481 } 1482 1483 static int team_user_linkup_en_option_set(struct team *team, 1484 struct team_gsetter_ctx *ctx) 1485 { 1486 struct team_port *port = ctx->info->port; 1487 1488 port->user.linkup_enabled = ctx->data.bool_val; 1489 team_refresh_port_linkup(port); 1490 __team_carrier_check(port->team); 1491 return 0; 1492 } 1493 1494 static int team_priority_option_get(struct team *team, 1495 struct team_gsetter_ctx *ctx) 1496 { 1497 struct team_port *port = ctx->info->port; 1498 1499 ctx->data.s32_val = port->priority; 1500 return 0; 1501 } 1502 1503 static int team_priority_option_set(struct team *team, 1504 struct team_gsetter_ctx *ctx) 1505 { 1506 struct team_port *port = ctx->info->port; 1507 s32 priority = ctx->data.s32_val; 1508 1509 if (port->priority == priority) 1510 return 0; 1511 port->priority = priority; 1512 team_queue_override_port_prio_changed(team, port); 1513 return 0; 1514 } 1515 1516 static int team_queue_id_option_get(struct team *team, 1517 struct team_gsetter_ctx *ctx) 1518 { 1519 struct team_port *port = ctx->info->port; 1520 1521 ctx->data.u32_val = port->queue_id; 1522 return 0; 1523 } 1524 1525 static int team_queue_id_option_set(struct team *team, 1526 struct team_gsetter_ctx *ctx) 1527 { 1528 struct team_port *port = ctx->info->port; 1529 u16 new_queue_id = ctx->data.u32_val; 1530 1531 if (port->queue_id == new_queue_id) 1532 return 0; 1533 if (new_queue_id >= team->dev->real_num_tx_queues) 1534 return -EINVAL; 1535 team_queue_override_port_change_queue_id(team, port, new_queue_id); 1536 return 0; 1537 } 1538 1539 static const struct team_option team_options[] = { 1540 { 1541 .name = "mode", 1542 .type = TEAM_OPTION_TYPE_STRING, 1543 .getter = team_mode_option_get, 1544 .setter = team_mode_option_set, 1545 }, 1546 { 1547 .name = "notify_peers_count", 1548 .type = TEAM_OPTION_TYPE_U32, 1549 .getter = team_notify_peers_count_get, 1550 .setter = team_notify_peers_count_set, 1551 }, 1552 { 1553 .name = "notify_peers_interval", 1554 .type = TEAM_OPTION_TYPE_U32, 1555 .getter = team_notify_peers_interval_get, 1556 .setter = team_notify_peers_interval_set, 1557 }, 1558 { 1559 .name = "mcast_rejoin_count", 1560 .type = TEAM_OPTION_TYPE_U32, 1561 .getter = team_mcast_rejoin_count_get, 1562 .setter = team_mcast_rejoin_count_set, 1563 }, 1564 { 1565 .name = "mcast_rejoin_interval", 1566 .type = TEAM_OPTION_TYPE_U32, 1567 .getter = team_mcast_rejoin_interval_get, 1568 .setter = team_mcast_rejoin_interval_set, 1569 }, 1570 { 1571 .name = "enabled", 1572 .type = TEAM_OPTION_TYPE_BOOL, 1573 .per_port = true, 1574 .getter = team_port_en_option_get, 1575 .setter = team_port_en_option_set, 1576 }, 1577 { 1578 .name = "user_linkup", 1579 .type = TEAM_OPTION_TYPE_BOOL, 1580 .per_port = true, 1581 .getter = team_user_linkup_option_get, 1582 .setter = team_user_linkup_option_set, 1583 }, 1584 { 1585 .name = "user_linkup_enabled", 1586 .type = TEAM_OPTION_TYPE_BOOL, 1587 .per_port = true, 1588 .getter = team_user_linkup_en_option_get, 1589 .setter = team_user_linkup_en_option_set, 1590 }, 1591 { 1592 .name = "priority", 1593 .type = TEAM_OPTION_TYPE_S32, 1594 .per_port = true, 1595 .getter = team_priority_option_get, 1596 .setter = team_priority_option_set, 1597 }, 1598 { 1599 .name = "queue_id", 1600 .type = TEAM_OPTION_TYPE_U32, 1601 .per_port = true, 1602 .getter = team_queue_id_option_get, 1603 .setter = team_queue_id_option_set, 1604 }, 1605 }; 1606 1607 1608 static int team_init(struct net_device *dev) 1609 { 1610 struct team *team = netdev_priv(dev); 1611 int i; 1612 int err; 1613 1614 team->dev = dev; 1615 mutex_init(&team->lock); 1616 team_set_no_mode(team); 1617 1618 team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats); 1619 if (!team->pcpu_stats) 1620 return -ENOMEM; 1621 1622 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++) 1623 INIT_HLIST_HEAD(&team->en_port_hlist[i]); 1624 INIT_LIST_HEAD(&team->port_list); 1625 err = team_queue_override_init(team); 1626 if (err) 1627 goto err_team_queue_override_init; 1628 1629 team_adjust_ops(team); 1630 1631 INIT_LIST_HEAD(&team->option_list); 1632 INIT_LIST_HEAD(&team->option_inst_list); 1633 1634 team_notify_peers_init(team); 1635 team_mcast_rejoin_init(team); 1636 1637 err = team_options_register(team, team_options, ARRAY_SIZE(team_options)); 1638 if (err) 1639 goto err_options_register; 1640 netif_carrier_off(dev); 1641 1642 netdev_lockdep_set_classes(dev); 1643 1644 return 0; 1645 1646 err_options_register: 1647 team_mcast_rejoin_fini(team); 1648 team_notify_peers_fini(team); 1649 team_queue_override_fini(team); 1650 err_team_queue_override_init: 1651 free_percpu(team->pcpu_stats); 1652 1653 return err; 1654 } 1655 1656 static void team_uninit(struct net_device *dev) 1657 { 1658 struct team *team = netdev_priv(dev); 1659 struct team_port *port; 1660 struct team_port *tmp; 1661 1662 mutex_lock(&team->lock); 1663 list_for_each_entry_safe(port, tmp, &team->port_list, list) 1664 team_port_del(team, port->dev); 1665 1666 __team_change_mode(team, NULL); /* cleanup */ 1667 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options)); 1668 team_mcast_rejoin_fini(team); 1669 team_notify_peers_fini(team); 1670 team_queue_override_fini(team); 1671 mutex_unlock(&team->lock); 1672 netdev_change_features(dev); 1673 } 1674 1675 static void team_destructor(struct net_device *dev) 1676 { 1677 struct team *team = netdev_priv(dev); 1678 1679 free_percpu(team->pcpu_stats); 1680 } 1681 1682 static int team_open(struct net_device *dev) 1683 { 1684 return 0; 1685 } 1686 1687 static int team_close(struct net_device *dev) 1688 { 1689 return 0; 1690 } 1691 1692 /* 1693 * note: already called with rcu_read_lock 1694 */ 1695 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev) 1696 { 1697 struct team *team = netdev_priv(dev); 1698 bool tx_success; 1699 unsigned int len = skb->len; 1700 1701 tx_success = team_queue_override_transmit(team, skb); 1702 if (!tx_success) 1703 tx_success = team->ops.transmit(team, skb); 1704 if (tx_success) { 1705 struct team_pcpu_stats *pcpu_stats; 1706 1707 pcpu_stats = this_cpu_ptr(team->pcpu_stats); 1708 u64_stats_update_begin(&pcpu_stats->syncp); 1709 pcpu_stats->tx_packets++; 1710 pcpu_stats->tx_bytes += len; 1711 u64_stats_update_end(&pcpu_stats->syncp); 1712 } else { 1713 this_cpu_inc(team->pcpu_stats->tx_dropped); 1714 } 1715 1716 return NETDEV_TX_OK; 1717 } 1718 1719 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb, 1720 struct net_device *sb_dev, 1721 select_queue_fallback_t fallback) 1722 { 1723 /* 1724 * This helper function exists to help dev_pick_tx get the correct 1725 * destination queue. Using a helper function skips a call to 1726 * skb_tx_hash and will put the skbs in the queue we expect on their 1727 * way down to the team driver. 1728 */ 1729 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0; 1730 1731 /* 1732 * Save the original txq to restore before passing to the driver 1733 */ 1734 qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping; 1735 1736 if (unlikely(txq >= dev->real_num_tx_queues)) { 1737 do { 1738 txq -= dev->real_num_tx_queues; 1739 } while (txq >= dev->real_num_tx_queues); 1740 } 1741 return txq; 1742 } 1743 1744 static void team_change_rx_flags(struct net_device *dev, int change) 1745 { 1746 struct team *team = netdev_priv(dev); 1747 struct team_port *port; 1748 int inc; 1749 1750 rcu_read_lock(); 1751 list_for_each_entry_rcu(port, &team->port_list, list) { 1752 if (change & IFF_PROMISC) { 1753 inc = dev->flags & IFF_PROMISC ? 1 : -1; 1754 dev_set_promiscuity(port->dev, inc); 1755 } 1756 if (change & IFF_ALLMULTI) { 1757 inc = dev->flags & IFF_ALLMULTI ? 1 : -1; 1758 dev_set_allmulti(port->dev, inc); 1759 } 1760 } 1761 rcu_read_unlock(); 1762 } 1763 1764 static void team_set_rx_mode(struct net_device *dev) 1765 { 1766 struct team *team = netdev_priv(dev); 1767 struct team_port *port; 1768 1769 rcu_read_lock(); 1770 list_for_each_entry_rcu(port, &team->port_list, list) { 1771 dev_uc_sync_multiple(port->dev, dev); 1772 dev_mc_sync_multiple(port->dev, dev); 1773 } 1774 rcu_read_unlock(); 1775 } 1776 1777 static int team_set_mac_address(struct net_device *dev, void *p) 1778 { 1779 struct sockaddr *addr = p; 1780 struct team *team = netdev_priv(dev); 1781 struct team_port *port; 1782 1783 if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data)) 1784 return -EADDRNOTAVAIL; 1785 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); 1786 mutex_lock(&team->lock); 1787 list_for_each_entry(port, &team->port_list, list) 1788 if (team->ops.port_change_dev_addr) 1789 team->ops.port_change_dev_addr(team, port); 1790 mutex_unlock(&team->lock); 1791 return 0; 1792 } 1793 1794 static int team_change_mtu(struct net_device *dev, int new_mtu) 1795 { 1796 struct team *team = netdev_priv(dev); 1797 struct team_port *port; 1798 int err; 1799 1800 /* 1801 * Alhough this is reader, it's guarded by team lock. It's not possible 1802 * to traverse list in reverse under rcu_read_lock 1803 */ 1804 mutex_lock(&team->lock); 1805 team->port_mtu_change_allowed = true; 1806 list_for_each_entry(port, &team->port_list, list) { 1807 err = dev_set_mtu(port->dev, new_mtu); 1808 if (err) { 1809 netdev_err(dev, "Device %s failed to change mtu", 1810 port->dev->name); 1811 goto unwind; 1812 } 1813 } 1814 team->port_mtu_change_allowed = false; 1815 mutex_unlock(&team->lock); 1816 1817 dev->mtu = new_mtu; 1818 1819 return 0; 1820 1821 unwind: 1822 list_for_each_entry_continue_reverse(port, &team->port_list, list) 1823 dev_set_mtu(port->dev, dev->mtu); 1824 team->port_mtu_change_allowed = false; 1825 mutex_unlock(&team->lock); 1826 1827 return err; 1828 } 1829 1830 static void 1831 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 1832 { 1833 struct team *team = netdev_priv(dev); 1834 struct team_pcpu_stats *p; 1835 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes; 1836 u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0; 1837 unsigned int start; 1838 int i; 1839 1840 for_each_possible_cpu(i) { 1841 p = per_cpu_ptr(team->pcpu_stats, i); 1842 do { 1843 start = u64_stats_fetch_begin_irq(&p->syncp); 1844 rx_packets = p->rx_packets; 1845 rx_bytes = p->rx_bytes; 1846 rx_multicast = p->rx_multicast; 1847 tx_packets = p->tx_packets; 1848 tx_bytes = p->tx_bytes; 1849 } while (u64_stats_fetch_retry_irq(&p->syncp, start)); 1850 1851 stats->rx_packets += rx_packets; 1852 stats->rx_bytes += rx_bytes; 1853 stats->multicast += rx_multicast; 1854 stats->tx_packets += tx_packets; 1855 stats->tx_bytes += tx_bytes; 1856 /* 1857 * rx_dropped, tx_dropped & rx_nohandler are u32, 1858 * updated without syncp protection. 1859 */ 1860 rx_dropped += p->rx_dropped; 1861 tx_dropped += p->tx_dropped; 1862 rx_nohandler += p->rx_nohandler; 1863 } 1864 stats->rx_dropped = rx_dropped; 1865 stats->tx_dropped = tx_dropped; 1866 stats->rx_nohandler = rx_nohandler; 1867 } 1868 1869 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) 1870 { 1871 struct team *team = netdev_priv(dev); 1872 struct team_port *port; 1873 int err; 1874 1875 /* 1876 * Alhough this is reader, it's guarded by team lock. It's not possible 1877 * to traverse list in reverse under rcu_read_lock 1878 */ 1879 mutex_lock(&team->lock); 1880 list_for_each_entry(port, &team->port_list, list) { 1881 err = vlan_vid_add(port->dev, proto, vid); 1882 if (err) 1883 goto unwind; 1884 } 1885 mutex_unlock(&team->lock); 1886 1887 return 0; 1888 1889 unwind: 1890 list_for_each_entry_continue_reverse(port, &team->port_list, list) 1891 vlan_vid_del(port->dev, proto, vid); 1892 mutex_unlock(&team->lock); 1893 1894 return err; 1895 } 1896 1897 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid) 1898 { 1899 struct team *team = netdev_priv(dev); 1900 struct team_port *port; 1901 1902 mutex_lock(&team->lock); 1903 list_for_each_entry(port, &team->port_list, list) 1904 vlan_vid_del(port->dev, proto, vid); 1905 mutex_unlock(&team->lock); 1906 1907 return 0; 1908 } 1909 1910 #ifdef CONFIG_NET_POLL_CONTROLLER 1911 static void team_poll_controller(struct net_device *dev) 1912 { 1913 } 1914 1915 static void __team_netpoll_cleanup(struct team *team) 1916 { 1917 struct team_port *port; 1918 1919 list_for_each_entry(port, &team->port_list, list) 1920 team_port_disable_netpoll(port); 1921 } 1922 1923 static void team_netpoll_cleanup(struct net_device *dev) 1924 { 1925 struct team *team = netdev_priv(dev); 1926 1927 mutex_lock(&team->lock); 1928 __team_netpoll_cleanup(team); 1929 mutex_unlock(&team->lock); 1930 } 1931 1932 static int team_netpoll_setup(struct net_device *dev, 1933 struct netpoll_info *npifo) 1934 { 1935 struct team *team = netdev_priv(dev); 1936 struct team_port *port; 1937 int err = 0; 1938 1939 mutex_lock(&team->lock); 1940 list_for_each_entry(port, &team->port_list, list) { 1941 err = __team_port_enable_netpoll(port); 1942 if (err) { 1943 __team_netpoll_cleanup(team); 1944 break; 1945 } 1946 } 1947 mutex_unlock(&team->lock); 1948 return err; 1949 } 1950 #endif 1951 1952 static int team_add_slave(struct net_device *dev, struct net_device *port_dev, 1953 struct netlink_ext_ack *extack) 1954 { 1955 struct team *team = netdev_priv(dev); 1956 int err; 1957 1958 mutex_lock(&team->lock); 1959 err = team_port_add(team, port_dev, extack); 1960 mutex_unlock(&team->lock); 1961 1962 if (!err) 1963 netdev_change_features(dev); 1964 1965 return err; 1966 } 1967 1968 static int team_del_slave(struct net_device *dev, struct net_device *port_dev) 1969 { 1970 struct team *team = netdev_priv(dev); 1971 int err; 1972 1973 mutex_lock(&team->lock); 1974 err = team_port_del(team, port_dev); 1975 mutex_unlock(&team->lock); 1976 1977 if (!err) 1978 netdev_change_features(dev); 1979 1980 return err; 1981 } 1982 1983 static netdev_features_t team_fix_features(struct net_device *dev, 1984 netdev_features_t features) 1985 { 1986 struct team_port *port; 1987 struct team *team = netdev_priv(dev); 1988 netdev_features_t mask; 1989 1990 mask = features; 1991 features &= ~NETIF_F_ONE_FOR_ALL; 1992 features |= NETIF_F_ALL_FOR_ALL; 1993 1994 rcu_read_lock(); 1995 list_for_each_entry_rcu(port, &team->port_list, list) { 1996 features = netdev_increment_features(features, 1997 port->dev->features, 1998 mask); 1999 } 2000 rcu_read_unlock(); 2001 2002 features = netdev_add_tso_features(features, mask); 2003 2004 return features; 2005 } 2006 2007 static int team_change_carrier(struct net_device *dev, bool new_carrier) 2008 { 2009 struct team *team = netdev_priv(dev); 2010 2011 team->user_carrier_enabled = true; 2012 2013 if (new_carrier) 2014 netif_carrier_on(dev); 2015 else 2016 netif_carrier_off(dev); 2017 return 0; 2018 } 2019 2020 static const struct net_device_ops team_netdev_ops = { 2021 .ndo_init = team_init, 2022 .ndo_uninit = team_uninit, 2023 .ndo_open = team_open, 2024 .ndo_stop = team_close, 2025 .ndo_start_xmit = team_xmit, 2026 .ndo_select_queue = team_select_queue, 2027 .ndo_change_rx_flags = team_change_rx_flags, 2028 .ndo_set_rx_mode = team_set_rx_mode, 2029 .ndo_set_mac_address = team_set_mac_address, 2030 .ndo_change_mtu = team_change_mtu, 2031 .ndo_get_stats64 = team_get_stats64, 2032 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid, 2033 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid, 2034 #ifdef CONFIG_NET_POLL_CONTROLLER 2035 .ndo_poll_controller = team_poll_controller, 2036 .ndo_netpoll_setup = team_netpoll_setup, 2037 .ndo_netpoll_cleanup = team_netpoll_cleanup, 2038 #endif 2039 .ndo_add_slave = team_add_slave, 2040 .ndo_del_slave = team_del_slave, 2041 .ndo_fix_features = team_fix_features, 2042 .ndo_change_carrier = team_change_carrier, 2043 .ndo_features_check = passthru_features_check, 2044 }; 2045 2046 /*********************** 2047 * ethtool interface 2048 ***********************/ 2049 2050 static void team_ethtool_get_drvinfo(struct net_device *dev, 2051 struct ethtool_drvinfo *drvinfo) 2052 { 2053 strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver)); 2054 strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version)); 2055 } 2056 2057 static const struct ethtool_ops team_ethtool_ops = { 2058 .get_drvinfo = team_ethtool_get_drvinfo, 2059 .get_link = ethtool_op_get_link, 2060 }; 2061 2062 /*********************** 2063 * rt netlink interface 2064 ***********************/ 2065 2066 static void team_setup_by_port(struct net_device *dev, 2067 struct net_device *port_dev) 2068 { 2069 dev->header_ops = port_dev->header_ops; 2070 dev->type = port_dev->type; 2071 dev->hard_header_len = port_dev->hard_header_len; 2072 dev->addr_len = port_dev->addr_len; 2073 dev->mtu = port_dev->mtu; 2074 memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len); 2075 eth_hw_addr_inherit(dev, port_dev); 2076 } 2077 2078 static int team_dev_type_check_change(struct net_device *dev, 2079 struct net_device *port_dev) 2080 { 2081 struct team *team = netdev_priv(dev); 2082 char *portname = port_dev->name; 2083 int err; 2084 2085 if (dev->type == port_dev->type) 2086 return 0; 2087 if (!list_empty(&team->port_list)) { 2088 netdev_err(dev, "Device %s is of different type\n", portname); 2089 return -EBUSY; 2090 } 2091 err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev); 2092 err = notifier_to_errno(err); 2093 if (err) { 2094 netdev_err(dev, "Refused to change device type\n"); 2095 return err; 2096 } 2097 dev_uc_flush(dev); 2098 dev_mc_flush(dev); 2099 team_setup_by_port(dev, port_dev); 2100 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev); 2101 return 0; 2102 } 2103 2104 static void team_setup(struct net_device *dev) 2105 { 2106 ether_setup(dev); 2107 dev->max_mtu = ETH_MAX_MTU; 2108 2109 dev->netdev_ops = &team_netdev_ops; 2110 dev->ethtool_ops = &team_ethtool_ops; 2111 dev->needs_free_netdev = true; 2112 dev->priv_destructor = team_destructor; 2113 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); 2114 dev->priv_flags |= IFF_NO_QUEUE; 2115 dev->priv_flags |= IFF_TEAM; 2116 2117 /* 2118 * Indicate we support unicast address filtering. That way core won't 2119 * bring us to promisc mode in case a unicast addr is added. 2120 * Let this up to underlay drivers. 2121 */ 2122 dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE; 2123 2124 dev->features |= NETIF_F_LLTX; 2125 dev->features |= NETIF_F_GRO; 2126 2127 /* Don't allow team devices to change network namespaces. */ 2128 dev->features |= NETIF_F_NETNS_LOCAL; 2129 2130 dev->hw_features = TEAM_VLAN_FEATURES | 2131 NETIF_F_HW_VLAN_CTAG_TX | 2132 NETIF_F_HW_VLAN_CTAG_RX | 2133 NETIF_F_HW_VLAN_CTAG_FILTER; 2134 2135 dev->hw_features |= NETIF_F_GSO_ENCAP_ALL | NETIF_F_GSO_UDP_L4; 2136 dev->features |= dev->hw_features; 2137 } 2138 2139 static int team_newlink(struct net *src_net, struct net_device *dev, 2140 struct nlattr *tb[], struct nlattr *data[], 2141 struct netlink_ext_ack *extack) 2142 { 2143 if (tb[IFLA_ADDRESS] == NULL) 2144 eth_hw_addr_random(dev); 2145 2146 return register_netdevice(dev); 2147 } 2148 2149 static int team_validate(struct nlattr *tb[], struct nlattr *data[], 2150 struct netlink_ext_ack *extack) 2151 { 2152 if (tb[IFLA_ADDRESS]) { 2153 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) 2154 return -EINVAL; 2155 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) 2156 return -EADDRNOTAVAIL; 2157 } 2158 return 0; 2159 } 2160 2161 static unsigned int team_get_num_tx_queues(void) 2162 { 2163 return TEAM_DEFAULT_NUM_TX_QUEUES; 2164 } 2165 2166 static unsigned int team_get_num_rx_queues(void) 2167 { 2168 return TEAM_DEFAULT_NUM_RX_QUEUES; 2169 } 2170 2171 static struct rtnl_link_ops team_link_ops __read_mostly = { 2172 .kind = DRV_NAME, 2173 .priv_size = sizeof(struct team), 2174 .setup = team_setup, 2175 .newlink = team_newlink, 2176 .validate = team_validate, 2177 .get_num_tx_queues = team_get_num_tx_queues, 2178 .get_num_rx_queues = team_get_num_rx_queues, 2179 }; 2180 2181 2182 /*********************************** 2183 * Generic netlink custom interface 2184 ***********************************/ 2185 2186 static struct genl_family team_nl_family; 2187 2188 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = { 2189 [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, }, 2190 [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 }, 2191 [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED }, 2192 [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED }, 2193 }; 2194 2195 static const struct nla_policy 2196 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = { 2197 [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, }, 2198 [TEAM_ATTR_OPTION_NAME] = { 2199 .type = NLA_STRING, 2200 .len = TEAM_STRING_MAX_LEN, 2201 }, 2202 [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG }, 2203 [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 }, 2204 [TEAM_ATTR_OPTION_DATA] = { .type = NLA_BINARY }, 2205 }; 2206 2207 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info) 2208 { 2209 struct sk_buff *msg; 2210 void *hdr; 2211 int err; 2212 2213 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 2214 if (!msg) 2215 return -ENOMEM; 2216 2217 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq, 2218 &team_nl_family, 0, TEAM_CMD_NOOP); 2219 if (!hdr) { 2220 err = -EMSGSIZE; 2221 goto err_msg_put; 2222 } 2223 2224 genlmsg_end(msg, hdr); 2225 2226 return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid); 2227 2228 err_msg_put: 2229 nlmsg_free(msg); 2230 2231 return err; 2232 } 2233 2234 /* 2235 * Netlink cmd functions should be locked by following two functions. 2236 * Since dev gets held here, that ensures dev won't disappear in between. 2237 */ 2238 static struct team *team_nl_team_get(struct genl_info *info) 2239 { 2240 struct net *net = genl_info_net(info); 2241 int ifindex; 2242 struct net_device *dev; 2243 struct team *team; 2244 2245 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX]) 2246 return NULL; 2247 2248 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]); 2249 dev = dev_get_by_index(net, ifindex); 2250 if (!dev || dev->netdev_ops != &team_netdev_ops) { 2251 if (dev) 2252 dev_put(dev); 2253 return NULL; 2254 } 2255 2256 team = netdev_priv(dev); 2257 mutex_lock(&team->lock); 2258 return team; 2259 } 2260 2261 static void team_nl_team_put(struct team *team) 2262 { 2263 mutex_unlock(&team->lock); 2264 dev_put(team->dev); 2265 } 2266 2267 typedef int team_nl_send_func_t(struct sk_buff *skb, 2268 struct team *team, u32 portid); 2269 2270 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid) 2271 { 2272 return genlmsg_unicast(dev_net(team->dev), skb, portid); 2273 } 2274 2275 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team, 2276 struct team_option_inst *opt_inst) 2277 { 2278 struct nlattr *option_item; 2279 struct team_option *option = opt_inst->option; 2280 struct team_option_inst_info *opt_inst_info = &opt_inst->info; 2281 struct team_gsetter_ctx ctx; 2282 int err; 2283 2284 ctx.info = opt_inst_info; 2285 err = team_option_get(team, opt_inst, &ctx); 2286 if (err) 2287 return err; 2288 2289 option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION); 2290 if (!option_item) 2291 return -EMSGSIZE; 2292 2293 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name)) 2294 goto nest_cancel; 2295 if (opt_inst_info->port && 2296 nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX, 2297 opt_inst_info->port->dev->ifindex)) 2298 goto nest_cancel; 2299 if (opt_inst->option->array_size && 2300 nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX, 2301 opt_inst_info->array_index)) 2302 goto nest_cancel; 2303 2304 switch (option->type) { 2305 case TEAM_OPTION_TYPE_U32: 2306 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32)) 2307 goto nest_cancel; 2308 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val)) 2309 goto nest_cancel; 2310 break; 2311 case TEAM_OPTION_TYPE_STRING: 2312 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING)) 2313 goto nest_cancel; 2314 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA, 2315 ctx.data.str_val)) 2316 goto nest_cancel; 2317 break; 2318 case TEAM_OPTION_TYPE_BINARY: 2319 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY)) 2320 goto nest_cancel; 2321 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len, 2322 ctx.data.bin_val.ptr)) 2323 goto nest_cancel; 2324 break; 2325 case TEAM_OPTION_TYPE_BOOL: 2326 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG)) 2327 goto nest_cancel; 2328 if (ctx.data.bool_val && 2329 nla_put_flag(skb, TEAM_ATTR_OPTION_DATA)) 2330 goto nest_cancel; 2331 break; 2332 case TEAM_OPTION_TYPE_S32: 2333 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32)) 2334 goto nest_cancel; 2335 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val)) 2336 goto nest_cancel; 2337 break; 2338 default: 2339 BUG(); 2340 } 2341 if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED)) 2342 goto nest_cancel; 2343 if (opt_inst->changed) { 2344 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED)) 2345 goto nest_cancel; 2346 opt_inst->changed = false; 2347 } 2348 nla_nest_end(skb, option_item); 2349 return 0; 2350 2351 nest_cancel: 2352 nla_nest_cancel(skb, option_item); 2353 return -EMSGSIZE; 2354 } 2355 2356 static int __send_and_alloc_skb(struct sk_buff **pskb, 2357 struct team *team, u32 portid, 2358 team_nl_send_func_t *send_func) 2359 { 2360 int err; 2361 2362 if (*pskb) { 2363 err = send_func(*pskb, team, portid); 2364 if (err) 2365 return err; 2366 } 2367 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL); 2368 if (!*pskb) 2369 return -ENOMEM; 2370 return 0; 2371 } 2372 2373 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq, 2374 int flags, team_nl_send_func_t *send_func, 2375 struct list_head *sel_opt_inst_list) 2376 { 2377 struct nlattr *option_list; 2378 struct nlmsghdr *nlh; 2379 void *hdr; 2380 struct team_option_inst *opt_inst; 2381 int err; 2382 struct sk_buff *skb = NULL; 2383 bool incomplete; 2384 int i; 2385 2386 opt_inst = list_first_entry(sel_opt_inst_list, 2387 struct team_option_inst, tmp_list); 2388 2389 start_again: 2390 err = __send_and_alloc_skb(&skb, team, portid, send_func); 2391 if (err) 2392 return err; 2393 2394 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI, 2395 TEAM_CMD_OPTIONS_GET); 2396 if (!hdr) { 2397 nlmsg_free(skb); 2398 return -EMSGSIZE; 2399 } 2400 2401 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex)) 2402 goto nla_put_failure; 2403 option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION); 2404 if (!option_list) 2405 goto nla_put_failure; 2406 2407 i = 0; 2408 incomplete = false; 2409 list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) { 2410 err = team_nl_fill_one_option_get(skb, team, opt_inst); 2411 if (err) { 2412 if (err == -EMSGSIZE) { 2413 if (!i) 2414 goto errout; 2415 incomplete = true; 2416 break; 2417 } 2418 goto errout; 2419 } 2420 i++; 2421 } 2422 2423 nla_nest_end(skb, option_list); 2424 genlmsg_end(skb, hdr); 2425 if (incomplete) 2426 goto start_again; 2427 2428 send_done: 2429 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI); 2430 if (!nlh) { 2431 err = __send_and_alloc_skb(&skb, team, portid, send_func); 2432 if (err) 2433 return err; 2434 goto send_done; 2435 } 2436 2437 return send_func(skb, team, portid); 2438 2439 nla_put_failure: 2440 err = -EMSGSIZE; 2441 errout: 2442 nlmsg_free(skb); 2443 return err; 2444 } 2445 2446 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info) 2447 { 2448 struct team *team; 2449 struct team_option_inst *opt_inst; 2450 int err; 2451 LIST_HEAD(sel_opt_inst_list); 2452 2453 team = team_nl_team_get(info); 2454 if (!team) 2455 return -EINVAL; 2456 2457 list_for_each_entry(opt_inst, &team->option_inst_list, list) 2458 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list); 2459 err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq, 2460 NLM_F_ACK, team_nl_send_unicast, 2461 &sel_opt_inst_list); 2462 2463 team_nl_team_put(team); 2464 2465 return err; 2466 } 2467 2468 static int team_nl_send_event_options_get(struct team *team, 2469 struct list_head *sel_opt_inst_list); 2470 2471 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info) 2472 { 2473 struct team *team; 2474 int err = 0; 2475 int i; 2476 struct nlattr *nl_option; 2477 2478 rtnl_lock(); 2479 2480 team = team_nl_team_get(info); 2481 if (!team) { 2482 err = -EINVAL; 2483 goto rtnl_unlock; 2484 } 2485 2486 err = -EINVAL; 2487 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) { 2488 err = -EINVAL; 2489 goto team_put; 2490 } 2491 2492 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) { 2493 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1]; 2494 struct nlattr *attr; 2495 struct nlattr *attr_data; 2496 LIST_HEAD(opt_inst_list); 2497 enum team_option_type opt_type; 2498 int opt_port_ifindex = 0; /* != 0 for per-port options */ 2499 u32 opt_array_index = 0; 2500 bool opt_is_array = false; 2501 struct team_option_inst *opt_inst; 2502 char *opt_name; 2503 bool opt_found = false; 2504 2505 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) { 2506 err = -EINVAL; 2507 goto team_put; 2508 } 2509 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX, 2510 nl_option, team_nl_option_policy, 2511 info->extack); 2512 if (err) 2513 goto team_put; 2514 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] || 2515 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) { 2516 err = -EINVAL; 2517 goto team_put; 2518 } 2519 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) { 2520 case NLA_U32: 2521 opt_type = TEAM_OPTION_TYPE_U32; 2522 break; 2523 case NLA_STRING: 2524 opt_type = TEAM_OPTION_TYPE_STRING; 2525 break; 2526 case NLA_BINARY: 2527 opt_type = TEAM_OPTION_TYPE_BINARY; 2528 break; 2529 case NLA_FLAG: 2530 opt_type = TEAM_OPTION_TYPE_BOOL; 2531 break; 2532 case NLA_S32: 2533 opt_type = TEAM_OPTION_TYPE_S32; 2534 break; 2535 default: 2536 goto team_put; 2537 } 2538 2539 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA]; 2540 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) { 2541 err = -EINVAL; 2542 goto team_put; 2543 } 2544 2545 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]); 2546 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX]; 2547 if (attr) 2548 opt_port_ifindex = nla_get_u32(attr); 2549 2550 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX]; 2551 if (attr) { 2552 opt_is_array = true; 2553 opt_array_index = nla_get_u32(attr); 2554 } 2555 2556 list_for_each_entry(opt_inst, &team->option_inst_list, list) { 2557 struct team_option *option = opt_inst->option; 2558 struct team_gsetter_ctx ctx; 2559 struct team_option_inst_info *opt_inst_info; 2560 int tmp_ifindex; 2561 2562 opt_inst_info = &opt_inst->info; 2563 tmp_ifindex = opt_inst_info->port ? 2564 opt_inst_info->port->dev->ifindex : 0; 2565 if (option->type != opt_type || 2566 strcmp(option->name, opt_name) || 2567 tmp_ifindex != opt_port_ifindex || 2568 (option->array_size && !opt_is_array) || 2569 opt_inst_info->array_index != opt_array_index) 2570 continue; 2571 opt_found = true; 2572 ctx.info = opt_inst_info; 2573 switch (opt_type) { 2574 case TEAM_OPTION_TYPE_U32: 2575 ctx.data.u32_val = nla_get_u32(attr_data); 2576 break; 2577 case TEAM_OPTION_TYPE_STRING: 2578 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) { 2579 err = -EINVAL; 2580 goto team_put; 2581 } 2582 ctx.data.str_val = nla_data(attr_data); 2583 break; 2584 case TEAM_OPTION_TYPE_BINARY: 2585 ctx.data.bin_val.len = nla_len(attr_data); 2586 ctx.data.bin_val.ptr = nla_data(attr_data); 2587 break; 2588 case TEAM_OPTION_TYPE_BOOL: 2589 ctx.data.bool_val = attr_data ? true : false; 2590 break; 2591 case TEAM_OPTION_TYPE_S32: 2592 ctx.data.s32_val = nla_get_s32(attr_data); 2593 break; 2594 default: 2595 BUG(); 2596 } 2597 err = team_option_set(team, opt_inst, &ctx); 2598 if (err) 2599 goto team_put; 2600 opt_inst->changed = true; 2601 list_add(&opt_inst->tmp_list, &opt_inst_list); 2602 } 2603 if (!opt_found) { 2604 err = -ENOENT; 2605 goto team_put; 2606 } 2607 2608 err = team_nl_send_event_options_get(team, &opt_inst_list); 2609 if (err) 2610 break; 2611 } 2612 2613 team_put: 2614 team_nl_team_put(team); 2615 rtnl_unlock: 2616 rtnl_unlock(); 2617 return err; 2618 } 2619 2620 static int team_nl_fill_one_port_get(struct sk_buff *skb, 2621 struct team_port *port) 2622 { 2623 struct nlattr *port_item; 2624 2625 port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT); 2626 if (!port_item) 2627 goto nest_cancel; 2628 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex)) 2629 goto nest_cancel; 2630 if (port->changed) { 2631 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED)) 2632 goto nest_cancel; 2633 port->changed = false; 2634 } 2635 if ((port->removed && 2636 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) || 2637 (port->state.linkup && 2638 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) || 2639 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) || 2640 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex)) 2641 goto nest_cancel; 2642 nla_nest_end(skb, port_item); 2643 return 0; 2644 2645 nest_cancel: 2646 nla_nest_cancel(skb, port_item); 2647 return -EMSGSIZE; 2648 } 2649 2650 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq, 2651 int flags, team_nl_send_func_t *send_func, 2652 struct team_port *one_port) 2653 { 2654 struct nlattr *port_list; 2655 struct nlmsghdr *nlh; 2656 void *hdr; 2657 struct team_port *port; 2658 int err; 2659 struct sk_buff *skb = NULL; 2660 bool incomplete; 2661 int i; 2662 2663 port = list_first_entry_or_null(&team->port_list, 2664 struct team_port, list); 2665 2666 start_again: 2667 err = __send_and_alloc_skb(&skb, team, portid, send_func); 2668 if (err) 2669 return err; 2670 2671 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI, 2672 TEAM_CMD_PORT_LIST_GET); 2673 if (!hdr) { 2674 nlmsg_free(skb); 2675 return -EMSGSIZE; 2676 } 2677 2678 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex)) 2679 goto nla_put_failure; 2680 port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT); 2681 if (!port_list) 2682 goto nla_put_failure; 2683 2684 i = 0; 2685 incomplete = false; 2686 2687 /* If one port is selected, called wants to send port list containing 2688 * only this port. Otherwise go through all listed ports and send all 2689 */ 2690 if (one_port) { 2691 err = team_nl_fill_one_port_get(skb, one_port); 2692 if (err) 2693 goto errout; 2694 } else if (port) { 2695 list_for_each_entry_from(port, &team->port_list, list) { 2696 err = team_nl_fill_one_port_get(skb, port); 2697 if (err) { 2698 if (err == -EMSGSIZE) { 2699 if (!i) 2700 goto errout; 2701 incomplete = true; 2702 break; 2703 } 2704 goto errout; 2705 } 2706 i++; 2707 } 2708 } 2709 2710 nla_nest_end(skb, port_list); 2711 genlmsg_end(skb, hdr); 2712 if (incomplete) 2713 goto start_again; 2714 2715 send_done: 2716 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI); 2717 if (!nlh) { 2718 err = __send_and_alloc_skb(&skb, team, portid, send_func); 2719 if (err) 2720 return err; 2721 goto send_done; 2722 } 2723 2724 return send_func(skb, team, portid); 2725 2726 nla_put_failure: 2727 err = -EMSGSIZE; 2728 errout: 2729 nlmsg_free(skb); 2730 return err; 2731 } 2732 2733 static int team_nl_cmd_port_list_get(struct sk_buff *skb, 2734 struct genl_info *info) 2735 { 2736 struct team *team; 2737 int err; 2738 2739 team = team_nl_team_get(info); 2740 if (!team) 2741 return -EINVAL; 2742 2743 err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq, 2744 NLM_F_ACK, team_nl_send_unicast, NULL); 2745 2746 team_nl_team_put(team); 2747 2748 return err; 2749 } 2750 2751 static const struct genl_ops team_nl_ops[] = { 2752 { 2753 .cmd = TEAM_CMD_NOOP, 2754 .doit = team_nl_cmd_noop, 2755 .policy = team_nl_policy, 2756 }, 2757 { 2758 .cmd = TEAM_CMD_OPTIONS_SET, 2759 .doit = team_nl_cmd_options_set, 2760 .policy = team_nl_policy, 2761 .flags = GENL_ADMIN_PERM, 2762 }, 2763 { 2764 .cmd = TEAM_CMD_OPTIONS_GET, 2765 .doit = team_nl_cmd_options_get, 2766 .policy = team_nl_policy, 2767 .flags = GENL_ADMIN_PERM, 2768 }, 2769 { 2770 .cmd = TEAM_CMD_PORT_LIST_GET, 2771 .doit = team_nl_cmd_port_list_get, 2772 .policy = team_nl_policy, 2773 .flags = GENL_ADMIN_PERM, 2774 }, 2775 }; 2776 2777 static const struct genl_multicast_group team_nl_mcgrps[] = { 2778 { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, }, 2779 }; 2780 2781 static struct genl_family team_nl_family __ro_after_init = { 2782 .name = TEAM_GENL_NAME, 2783 .version = TEAM_GENL_VERSION, 2784 .maxattr = TEAM_ATTR_MAX, 2785 .netnsok = true, 2786 .module = THIS_MODULE, 2787 .ops = team_nl_ops, 2788 .n_ops = ARRAY_SIZE(team_nl_ops), 2789 .mcgrps = team_nl_mcgrps, 2790 .n_mcgrps = ARRAY_SIZE(team_nl_mcgrps), 2791 }; 2792 2793 static int team_nl_send_multicast(struct sk_buff *skb, 2794 struct team *team, u32 portid) 2795 { 2796 return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev), 2797 skb, 0, 0, GFP_KERNEL); 2798 } 2799 2800 static int team_nl_send_event_options_get(struct team *team, 2801 struct list_head *sel_opt_inst_list) 2802 { 2803 return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast, 2804 sel_opt_inst_list); 2805 } 2806 2807 static int team_nl_send_event_port_get(struct team *team, 2808 struct team_port *port) 2809 { 2810 return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast, 2811 port); 2812 } 2813 2814 static int __init team_nl_init(void) 2815 { 2816 return genl_register_family(&team_nl_family); 2817 } 2818 2819 static void team_nl_fini(void) 2820 { 2821 genl_unregister_family(&team_nl_family); 2822 } 2823 2824 2825 /****************** 2826 * Change checkers 2827 ******************/ 2828 2829 static void __team_options_change_check(struct team *team) 2830 { 2831 int err; 2832 struct team_option_inst *opt_inst; 2833 LIST_HEAD(sel_opt_inst_list); 2834 2835 list_for_each_entry(opt_inst, &team->option_inst_list, list) { 2836 if (opt_inst->changed) 2837 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list); 2838 } 2839 err = team_nl_send_event_options_get(team, &sel_opt_inst_list); 2840 if (err && err != -ESRCH) 2841 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n", 2842 err); 2843 } 2844 2845 /* rtnl lock is held */ 2846 2847 static void __team_port_change_send(struct team_port *port, bool linkup) 2848 { 2849 int err; 2850 2851 port->changed = true; 2852 port->state.linkup = linkup; 2853 team_refresh_port_linkup(port); 2854 if (linkup) { 2855 struct ethtool_link_ksettings ecmd; 2856 2857 err = __ethtool_get_link_ksettings(port->dev, &ecmd); 2858 if (!err) { 2859 port->state.speed = ecmd.base.speed; 2860 port->state.duplex = ecmd.base.duplex; 2861 goto send_event; 2862 } 2863 } 2864 port->state.speed = 0; 2865 port->state.duplex = 0; 2866 2867 send_event: 2868 err = team_nl_send_event_port_get(port->team, port); 2869 if (err && err != -ESRCH) 2870 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n", 2871 port->dev->name, err); 2872 2873 } 2874 2875 static void __team_carrier_check(struct team *team) 2876 { 2877 struct team_port *port; 2878 bool team_linkup; 2879 2880 if (team->user_carrier_enabled) 2881 return; 2882 2883 team_linkup = false; 2884 list_for_each_entry(port, &team->port_list, list) { 2885 if (port->linkup) { 2886 team_linkup = true; 2887 break; 2888 } 2889 } 2890 2891 if (team_linkup) 2892 netif_carrier_on(team->dev); 2893 else 2894 netif_carrier_off(team->dev); 2895 } 2896 2897 static void __team_port_change_check(struct team_port *port, bool linkup) 2898 { 2899 if (port->state.linkup != linkup) 2900 __team_port_change_send(port, linkup); 2901 __team_carrier_check(port->team); 2902 } 2903 2904 static void __team_port_change_port_added(struct team_port *port, bool linkup) 2905 { 2906 __team_port_change_send(port, linkup); 2907 __team_carrier_check(port->team); 2908 } 2909 2910 static void __team_port_change_port_removed(struct team_port *port) 2911 { 2912 port->removed = true; 2913 __team_port_change_send(port, false); 2914 __team_carrier_check(port->team); 2915 } 2916 2917 static void team_port_change_check(struct team_port *port, bool linkup) 2918 { 2919 struct team *team = port->team; 2920 2921 mutex_lock(&team->lock); 2922 __team_port_change_check(port, linkup); 2923 mutex_unlock(&team->lock); 2924 } 2925 2926 2927 /************************************ 2928 * Net device notifier event handler 2929 ************************************/ 2930 2931 static int team_device_event(struct notifier_block *unused, 2932 unsigned long event, void *ptr) 2933 { 2934 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 2935 struct team_port *port; 2936 2937 port = team_port_get_rtnl(dev); 2938 if (!port) 2939 return NOTIFY_DONE; 2940 2941 switch (event) { 2942 case NETDEV_UP: 2943 if (netif_oper_up(dev)) 2944 team_port_change_check(port, true); 2945 break; 2946 case NETDEV_DOWN: 2947 team_port_change_check(port, false); 2948 break; 2949 case NETDEV_CHANGE: 2950 if (netif_running(port->dev)) 2951 team_port_change_check(port, 2952 !!netif_oper_up(port->dev)); 2953 break; 2954 case NETDEV_UNREGISTER: 2955 team_del_slave(port->team->dev, dev); 2956 break; 2957 case NETDEV_FEAT_CHANGE: 2958 team_compute_features(port->team); 2959 break; 2960 case NETDEV_PRECHANGEMTU: 2961 /* Forbid to change mtu of underlaying device */ 2962 if (!port->team->port_mtu_change_allowed) 2963 return NOTIFY_BAD; 2964 break; 2965 case NETDEV_PRE_TYPE_CHANGE: 2966 /* Forbid to change type of underlaying device */ 2967 return NOTIFY_BAD; 2968 case NETDEV_RESEND_IGMP: 2969 /* Propagate to master device */ 2970 call_netdevice_notifiers(event, port->team->dev); 2971 break; 2972 } 2973 return NOTIFY_DONE; 2974 } 2975 2976 static struct notifier_block team_notifier_block __read_mostly = { 2977 .notifier_call = team_device_event, 2978 }; 2979 2980 2981 /*********************** 2982 * Module init and exit 2983 ***********************/ 2984 2985 static int __init team_module_init(void) 2986 { 2987 int err; 2988 2989 register_netdevice_notifier(&team_notifier_block); 2990 2991 err = rtnl_link_register(&team_link_ops); 2992 if (err) 2993 goto err_rtnl_reg; 2994 2995 err = team_nl_init(); 2996 if (err) 2997 goto err_nl_init; 2998 2999 return 0; 3000 3001 err_nl_init: 3002 rtnl_link_unregister(&team_link_ops); 3003 3004 err_rtnl_reg: 3005 unregister_netdevice_notifier(&team_notifier_block); 3006 3007 return err; 3008 } 3009 3010 static void __exit team_module_exit(void) 3011 { 3012 team_nl_fini(); 3013 rtnl_link_unregister(&team_link_ops); 3014 unregister_netdevice_notifier(&team_notifier_block); 3015 } 3016 3017 module_init(team_module_init); 3018 module_exit(team_module_exit); 3019 3020 MODULE_LICENSE("GPL v2"); 3021 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>"); 3022 MODULE_DESCRIPTION("Ethernet team device driver"); 3023 MODULE_ALIAS_RTNL_LINK(DRV_NAME); 3024