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