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 static struct team_port *team_port_get_rtnl(const struct net_device *dev) 42 { 43 struct team_port *port = rtnl_dereference(dev->rx_handler_data); 44 45 return netif_is_team_port(dev) ? port : NULL; 46 } 47 48 /* 49 * Since the ability to change device address for open port device is tested in 50 * team_port_add, this function can be called without control of return value 51 */ 52 static int __set_port_dev_addr(struct net_device *port_dev, 53 const unsigned char *dev_addr) 54 { 55 struct sockaddr_storage addr; 56 57 memcpy(addr.__data, dev_addr, port_dev->addr_len); 58 addr.ss_family = port_dev->type; 59 return dev_set_mac_address(port_dev, (struct sockaddr *)&addr, NULL); 60 } 61 62 static int team_port_set_orig_dev_addr(struct team_port *port) 63 { 64 return __set_port_dev_addr(port->dev, port->orig.dev_addr); 65 } 66 67 static int team_port_set_team_dev_addr(struct team *team, 68 struct team_port *port) 69 { 70 return __set_port_dev_addr(port->dev, team->dev->dev_addr); 71 } 72 73 int team_modeop_port_enter(struct team *team, struct team_port *port) 74 { 75 return team_port_set_team_dev_addr(team, port); 76 } 77 EXPORT_SYMBOL(team_modeop_port_enter); 78 79 void team_modeop_port_change_dev_addr(struct team *team, 80 struct team_port *port) 81 { 82 team_port_set_team_dev_addr(team, port); 83 } 84 EXPORT_SYMBOL(team_modeop_port_change_dev_addr); 85 86 static void team_lower_state_changed(struct team_port *port) 87 { 88 struct netdev_lag_lower_state_info info; 89 90 info.link_up = port->linkup; 91 info.tx_enabled = team_port_enabled(port); 92 netdev_lower_state_changed(port->dev, &info); 93 } 94 95 static void team_refresh_port_linkup(struct team_port *port) 96 { 97 bool new_linkup = port->user.linkup_enabled ? port->user.linkup : 98 port->state.linkup; 99 100 if (port->linkup != new_linkup) { 101 port->linkup = new_linkup; 102 team_lower_state_changed(port); 103 } 104 } 105 106 107 /******************* 108 * Options handling 109 *******************/ 110 111 struct team_option_inst { /* One for each option instance */ 112 struct list_head list; 113 struct list_head tmp_list; 114 struct team_option *option; 115 struct team_option_inst_info info; 116 bool changed; 117 bool removed; 118 }; 119 120 static struct team_option *__team_find_option(struct team *team, 121 const char *opt_name) 122 { 123 struct team_option *option; 124 125 list_for_each_entry(option, &team->option_list, list) { 126 if (strcmp(option->name, opt_name) == 0) 127 return option; 128 } 129 return NULL; 130 } 131 132 static void __team_option_inst_del(struct team_option_inst *opt_inst) 133 { 134 list_del(&opt_inst->list); 135 kfree(opt_inst); 136 } 137 138 static void __team_option_inst_del_option(struct team *team, 139 struct team_option *option) 140 { 141 struct team_option_inst *opt_inst, *tmp; 142 143 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) { 144 if (opt_inst->option == option) 145 __team_option_inst_del(opt_inst); 146 } 147 } 148 149 static int __team_option_inst_add(struct team *team, struct team_option *option, 150 struct team_port *port) 151 { 152 struct team_option_inst *opt_inst; 153 unsigned int array_size; 154 unsigned int i; 155 int err; 156 157 array_size = option->array_size; 158 if (!array_size) 159 array_size = 1; /* No array but still need one instance */ 160 161 for (i = 0; i < array_size; i++) { 162 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL); 163 if (!opt_inst) 164 return -ENOMEM; 165 opt_inst->option = option; 166 opt_inst->info.port = port; 167 opt_inst->info.array_index = i; 168 opt_inst->changed = true; 169 opt_inst->removed = false; 170 list_add_tail(&opt_inst->list, &team->option_inst_list); 171 if (option->init) { 172 err = option->init(team, &opt_inst->info); 173 if (err) 174 return err; 175 } 176 177 } 178 return 0; 179 } 180 181 static int __team_option_inst_add_option(struct team *team, 182 struct team_option *option) 183 { 184 int err; 185 186 if (!option->per_port) { 187 err = __team_option_inst_add(team, option, NULL); 188 if (err) 189 goto inst_del_option; 190 } 191 return 0; 192 193 inst_del_option: 194 __team_option_inst_del_option(team, option); 195 return err; 196 } 197 198 static void __team_option_inst_mark_removed_option(struct team *team, 199 struct team_option *option) 200 { 201 struct team_option_inst *opt_inst; 202 203 list_for_each_entry(opt_inst, &team->option_inst_list, list) { 204 if (opt_inst->option == option) { 205 opt_inst->changed = true; 206 opt_inst->removed = true; 207 } 208 } 209 } 210 211 static void __team_option_inst_del_port(struct team *team, 212 struct team_port *port) 213 { 214 struct team_option_inst *opt_inst, *tmp; 215 216 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) { 217 if (opt_inst->option->per_port && 218 opt_inst->info.port == port) 219 __team_option_inst_del(opt_inst); 220 } 221 } 222 223 static int __team_option_inst_add_port(struct team *team, 224 struct team_port *port) 225 { 226 struct team_option *option; 227 int err; 228 229 list_for_each_entry(option, &team->option_list, list) { 230 if (!option->per_port) 231 continue; 232 err = __team_option_inst_add(team, option, port); 233 if (err) 234 goto inst_del_port; 235 } 236 return 0; 237 238 inst_del_port: 239 __team_option_inst_del_port(team, port); 240 return err; 241 } 242 243 static void __team_option_inst_mark_removed_port(struct team *team, 244 struct team_port *port) 245 { 246 struct team_option_inst *opt_inst; 247 248 list_for_each_entry(opt_inst, &team->option_inst_list, list) { 249 if (opt_inst->info.port == port) { 250 opt_inst->changed = true; 251 opt_inst->removed = true; 252 } 253 } 254 } 255 256 static int __team_options_register(struct team *team, 257 const struct team_option *option, 258 size_t option_count) 259 { 260 int i; 261 struct team_option **dst_opts; 262 int err; 263 264 dst_opts = kcalloc(option_count, sizeof(struct team_option *), 265 GFP_KERNEL); 266 if (!dst_opts) 267 return -ENOMEM; 268 for (i = 0; i < option_count; i++, option++) { 269 if (__team_find_option(team, option->name)) { 270 err = -EEXIST; 271 goto alloc_rollback; 272 } 273 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL); 274 if (!dst_opts[i]) { 275 err = -ENOMEM; 276 goto alloc_rollback; 277 } 278 } 279 280 for (i = 0; i < option_count; i++) { 281 err = __team_option_inst_add_option(team, dst_opts[i]); 282 if (err) 283 goto inst_rollback; 284 list_add_tail(&dst_opts[i]->list, &team->option_list); 285 } 286 287 kfree(dst_opts); 288 return 0; 289 290 inst_rollback: 291 for (i--; i >= 0; i--) 292 __team_option_inst_del_option(team, dst_opts[i]); 293 294 i = option_count - 1; 295 alloc_rollback: 296 for (i--; i >= 0; i--) 297 kfree(dst_opts[i]); 298 299 kfree(dst_opts); 300 return err; 301 } 302 303 static void __team_options_mark_removed(struct team *team, 304 const struct team_option *option, 305 size_t option_count) 306 { 307 int i; 308 309 for (i = 0; i < option_count; i++, option++) { 310 struct team_option *del_opt; 311 312 del_opt = __team_find_option(team, option->name); 313 if (del_opt) 314 __team_option_inst_mark_removed_option(team, del_opt); 315 } 316 } 317 318 static void __team_options_unregister(struct team *team, 319 const struct team_option *option, 320 size_t option_count) 321 { 322 int i; 323 324 for (i = 0; i < option_count; i++, option++) { 325 struct team_option *del_opt; 326 327 del_opt = __team_find_option(team, option->name); 328 if (del_opt) { 329 __team_option_inst_del_option(team, del_opt); 330 list_del(&del_opt->list); 331 kfree(del_opt); 332 } 333 } 334 } 335 336 static void __team_options_change_check(struct team *team); 337 338 int team_options_register(struct team *team, 339 const struct team_option *option, 340 size_t option_count) 341 { 342 int err; 343 344 err = __team_options_register(team, option, option_count); 345 if (err) 346 return err; 347 __team_options_change_check(team); 348 return 0; 349 } 350 EXPORT_SYMBOL(team_options_register); 351 352 void team_options_unregister(struct team *team, 353 const struct team_option *option, 354 size_t option_count) 355 { 356 __team_options_mark_removed(team, option, option_count); 357 __team_options_change_check(team); 358 __team_options_unregister(team, option, option_count); 359 } 360 EXPORT_SYMBOL(team_options_unregister); 361 362 static int team_option_get(struct team *team, 363 struct team_option_inst *opt_inst, 364 struct team_gsetter_ctx *ctx) 365 { 366 if (!opt_inst->option->getter) 367 return -EOPNOTSUPP; 368 return opt_inst->option->getter(team, ctx); 369 } 370 371 static int team_option_set(struct team *team, 372 struct team_option_inst *opt_inst, 373 struct team_gsetter_ctx *ctx) 374 { 375 if (!opt_inst->option->setter) 376 return -EOPNOTSUPP; 377 return opt_inst->option->setter(team, ctx); 378 } 379 380 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info) 381 { 382 struct team_option_inst *opt_inst; 383 384 opt_inst = container_of(opt_inst_info, struct team_option_inst, info); 385 opt_inst->changed = true; 386 } 387 EXPORT_SYMBOL(team_option_inst_set_change); 388 389 void team_options_change_check(struct team *team) 390 { 391 __team_options_change_check(team); 392 } 393 EXPORT_SYMBOL(team_options_change_check); 394 395 396 /**************** 397 * Mode handling 398 ****************/ 399 400 static LIST_HEAD(mode_list); 401 static DEFINE_SPINLOCK(mode_list_lock); 402 403 struct team_mode_item { 404 struct list_head list; 405 const struct team_mode *mode; 406 }; 407 408 static struct team_mode_item *__find_mode(const char *kind) 409 { 410 struct team_mode_item *mitem; 411 412 list_for_each_entry(mitem, &mode_list, list) { 413 if (strcmp(mitem->mode->kind, kind) == 0) 414 return mitem; 415 } 416 return NULL; 417 } 418 419 static bool is_good_mode_name(const char *name) 420 { 421 while (*name != '\0') { 422 if (!isalpha(*name) && !isdigit(*name) && *name != '_') 423 return false; 424 name++; 425 } 426 return true; 427 } 428 429 int team_mode_register(const struct team_mode *mode) 430 { 431 int err = 0; 432 struct team_mode_item *mitem; 433 434 if (!is_good_mode_name(mode->kind) || 435 mode->priv_size > TEAM_MODE_PRIV_SIZE) 436 return -EINVAL; 437 438 mitem = kmalloc(sizeof(*mitem), GFP_KERNEL); 439 if (!mitem) 440 return -ENOMEM; 441 442 spin_lock(&mode_list_lock); 443 if (__find_mode(mode->kind)) { 444 err = -EEXIST; 445 kfree(mitem); 446 goto unlock; 447 } 448 mitem->mode = mode; 449 list_add_tail(&mitem->list, &mode_list); 450 unlock: 451 spin_unlock(&mode_list_lock); 452 return err; 453 } 454 EXPORT_SYMBOL(team_mode_register); 455 456 void team_mode_unregister(const struct team_mode *mode) 457 { 458 struct team_mode_item *mitem; 459 460 spin_lock(&mode_list_lock); 461 mitem = __find_mode(mode->kind); 462 if (mitem) { 463 list_del_init(&mitem->list); 464 kfree(mitem); 465 } 466 spin_unlock(&mode_list_lock); 467 } 468 EXPORT_SYMBOL(team_mode_unregister); 469 470 static const struct team_mode *team_mode_get(const char *kind) 471 { 472 struct team_mode_item *mitem; 473 const struct team_mode *mode = NULL; 474 475 spin_lock(&mode_list_lock); 476 mitem = __find_mode(kind); 477 if (!mitem) { 478 spin_unlock(&mode_list_lock); 479 request_module("team-mode-%s", kind); 480 spin_lock(&mode_list_lock); 481 mitem = __find_mode(kind); 482 } 483 if (mitem) { 484 mode = mitem->mode; 485 if (!try_module_get(mode->owner)) 486 mode = NULL; 487 } 488 489 spin_unlock(&mode_list_lock); 490 return mode; 491 } 492 493 static void team_mode_put(const struct team_mode *mode) 494 { 495 module_put(mode->owner); 496 } 497 498 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb) 499 { 500 dev_kfree_skb_any(skb); 501 return false; 502 } 503 504 static rx_handler_result_t team_dummy_receive(struct team *team, 505 struct team_port *port, 506 struct sk_buff *skb) 507 { 508 return RX_HANDLER_ANOTHER; 509 } 510 511 static const struct team_mode __team_no_mode = { 512 .kind = "*NOMODE*", 513 }; 514 515 static bool team_is_mode_set(struct team *team) 516 { 517 return team->mode != &__team_no_mode; 518 } 519 520 static void team_set_no_mode(struct team *team) 521 { 522 team->user_carrier_enabled = false; 523 team->mode = &__team_no_mode; 524 } 525 526 static void team_adjust_ops(struct team *team) 527 { 528 /* 529 * To avoid checks in rx/tx skb paths, ensure here that non-null and 530 * correct ops are always set. 531 */ 532 533 if (!team->en_port_count || !team_is_mode_set(team) || 534 !team->mode->ops->transmit) 535 team->ops.transmit = team_dummy_transmit; 536 else 537 team->ops.transmit = team->mode->ops->transmit; 538 539 if (!team->en_port_count || !team_is_mode_set(team) || 540 !team->mode->ops->receive) 541 team->ops.receive = team_dummy_receive; 542 else 543 team->ops.receive = team->mode->ops->receive; 544 } 545 546 /* 547 * We can benefit from the fact that it's ensured no port is present 548 * at the time of mode change. Therefore no packets are in fly so there's no 549 * need to set mode operations in any special way. 550 */ 551 static int __team_change_mode(struct team *team, 552 const struct team_mode *new_mode) 553 { 554 /* Check if mode was previously set and do cleanup if so */ 555 if (team_is_mode_set(team)) { 556 void (*exit_op)(struct team *team) = team->ops.exit; 557 558 /* Clear ops area so no callback is called any longer */ 559 memset(&team->ops, 0, sizeof(struct team_mode_ops)); 560 team_adjust_ops(team); 561 562 if (exit_op) 563 exit_op(team); 564 team_mode_put(team->mode); 565 team_set_no_mode(team); 566 /* zero private data area */ 567 memset(&team->mode_priv, 0, 568 sizeof(struct team) - offsetof(struct team, mode_priv)); 569 } 570 571 if (!new_mode) 572 return 0; 573 574 if (new_mode->ops->init) { 575 int err; 576 577 err = new_mode->ops->init(team); 578 if (err) 579 return err; 580 } 581 582 team->mode = new_mode; 583 memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops)); 584 team_adjust_ops(team); 585 586 return 0; 587 } 588 589 static int team_change_mode(struct team *team, const char *kind) 590 { 591 const struct team_mode *new_mode; 592 struct net_device *dev = team->dev; 593 int err; 594 595 if (!list_empty(&team->port_list)) { 596 netdev_err(dev, "No ports can be present during mode change\n"); 597 return -EBUSY; 598 } 599 600 if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) { 601 netdev_err(dev, "Unable to change to the same mode the team is in\n"); 602 return -EINVAL; 603 } 604 605 new_mode = team_mode_get(kind); 606 if (!new_mode) { 607 netdev_err(dev, "Mode \"%s\" not found\n", kind); 608 return -EINVAL; 609 } 610 611 err = __team_change_mode(team, new_mode); 612 if (err) { 613 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind); 614 team_mode_put(new_mode); 615 return err; 616 } 617 618 netdev_info(dev, "Mode changed to \"%s\"\n", kind); 619 return 0; 620 } 621 622 623 /********************* 624 * Peers notification 625 *********************/ 626 627 static void team_notify_peers_work(struct work_struct *work) 628 { 629 struct team *team; 630 int val; 631 632 team = container_of(work, struct team, notify_peers.dw.work); 633 634 if (!rtnl_trylock()) { 635 schedule_delayed_work(&team->notify_peers.dw, 0); 636 return; 637 } 638 val = atomic_dec_if_positive(&team->notify_peers.count_pending); 639 if (val < 0) { 640 rtnl_unlock(); 641 return; 642 } 643 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev); 644 rtnl_unlock(); 645 if (val) 646 schedule_delayed_work(&team->notify_peers.dw, 647 msecs_to_jiffies(team->notify_peers.interval)); 648 } 649 650 static void team_notify_peers(struct team *team) 651 { 652 if (!team->notify_peers.count || !netif_running(team->dev)) 653 return; 654 atomic_add(team->notify_peers.count, &team->notify_peers.count_pending); 655 schedule_delayed_work(&team->notify_peers.dw, 0); 656 } 657 658 static void team_notify_peers_init(struct team *team) 659 { 660 INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work); 661 } 662 663 static void team_notify_peers_fini(struct team *team) 664 { 665 cancel_delayed_work_sync(&team->notify_peers.dw); 666 } 667 668 669 /******************************* 670 * Send multicast group rejoins 671 *******************************/ 672 673 static void team_mcast_rejoin_work(struct work_struct *work) 674 { 675 struct team *team; 676 int val; 677 678 team = container_of(work, struct team, mcast_rejoin.dw.work); 679 680 if (!rtnl_trylock()) { 681 schedule_delayed_work(&team->mcast_rejoin.dw, 0); 682 return; 683 } 684 val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending); 685 if (val < 0) { 686 rtnl_unlock(); 687 return; 688 } 689 call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev); 690 rtnl_unlock(); 691 if (val) 692 schedule_delayed_work(&team->mcast_rejoin.dw, 693 msecs_to_jiffies(team->mcast_rejoin.interval)); 694 } 695 696 static void team_mcast_rejoin(struct team *team) 697 { 698 if (!team->mcast_rejoin.count || !netif_running(team->dev)) 699 return; 700 atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending); 701 schedule_delayed_work(&team->mcast_rejoin.dw, 0); 702 } 703 704 static void team_mcast_rejoin_init(struct team *team) 705 { 706 INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work); 707 } 708 709 static void team_mcast_rejoin_fini(struct team *team) 710 { 711 cancel_delayed_work_sync(&team->mcast_rejoin.dw); 712 } 713 714 715 /************************ 716 * Rx path frame handler 717 ************************/ 718 719 /* note: already called with rcu_read_lock */ 720 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb) 721 { 722 struct sk_buff *skb = *pskb; 723 struct team_port *port; 724 struct team *team; 725 rx_handler_result_t res; 726 727 skb = skb_share_check(skb, GFP_ATOMIC); 728 if (!skb) 729 return RX_HANDLER_CONSUMED; 730 731 *pskb = skb; 732 733 port = team_port_get_rcu(skb->dev); 734 team = port->team; 735 if (!team_port_enabled(port)) { 736 /* allow exact match delivery for disabled ports */ 737 res = RX_HANDLER_EXACT; 738 } else { 739 res = team->ops.receive(team, port, skb); 740 } 741 if (res == RX_HANDLER_ANOTHER) { 742 struct team_pcpu_stats *pcpu_stats; 743 744 pcpu_stats = this_cpu_ptr(team->pcpu_stats); 745 u64_stats_update_begin(&pcpu_stats->syncp); 746 pcpu_stats->rx_packets++; 747 pcpu_stats->rx_bytes += skb->len; 748 if (skb->pkt_type == PACKET_MULTICAST) 749 pcpu_stats->rx_multicast++; 750 u64_stats_update_end(&pcpu_stats->syncp); 751 752 skb->dev = team->dev; 753 } else if (res == RX_HANDLER_EXACT) { 754 this_cpu_inc(team->pcpu_stats->rx_nohandler); 755 } else { 756 this_cpu_inc(team->pcpu_stats->rx_dropped); 757 } 758 759 return res; 760 } 761 762 763 /************************************* 764 * Multiqueue Tx port select override 765 *************************************/ 766 767 static int team_queue_override_init(struct team *team) 768 { 769 struct list_head *listarr; 770 unsigned int queue_cnt = team->dev->num_tx_queues - 1; 771 unsigned int i; 772 773 if (!queue_cnt) 774 return 0; 775 listarr = kmalloc_array(queue_cnt, sizeof(struct list_head), 776 GFP_KERNEL); 777 if (!listarr) 778 return -ENOMEM; 779 team->qom_lists = listarr; 780 for (i = 0; i < queue_cnt; i++) 781 INIT_LIST_HEAD(listarr++); 782 return 0; 783 } 784 785 static void team_queue_override_fini(struct team *team) 786 { 787 kfree(team->qom_lists); 788 } 789 790 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id) 791 { 792 return &team->qom_lists[queue_id - 1]; 793 } 794 795 /* 796 * note: already called with rcu_read_lock 797 */ 798 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb) 799 { 800 struct list_head *qom_list; 801 struct team_port *port; 802 803 if (!team->queue_override_enabled || !skb->queue_mapping) 804 return false; 805 qom_list = __team_get_qom_list(team, skb->queue_mapping); 806 list_for_each_entry_rcu(port, qom_list, qom_list) { 807 if (!team_dev_queue_xmit(team, port, skb)) 808 return true; 809 } 810 return false; 811 } 812 813 static void __team_queue_override_port_del(struct team *team, 814 struct team_port *port) 815 { 816 if (!port->queue_id) 817 return; 818 list_del_rcu(&port->qom_list); 819 } 820 821 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port, 822 struct team_port *cur) 823 { 824 if (port->priority < cur->priority) 825 return true; 826 if (port->priority > cur->priority) 827 return false; 828 if (port->index < cur->index) 829 return true; 830 return false; 831 } 832 833 static void __team_queue_override_port_add(struct team *team, 834 struct team_port *port) 835 { 836 struct team_port *cur; 837 struct list_head *qom_list; 838 struct list_head *node; 839 840 if (!port->queue_id) 841 return; 842 qom_list = __team_get_qom_list(team, port->queue_id); 843 node = qom_list; 844 list_for_each_entry(cur, qom_list, qom_list) { 845 if (team_queue_override_port_has_gt_prio_than(port, cur)) 846 break; 847 node = &cur->qom_list; 848 } 849 list_add_tail_rcu(&port->qom_list, node); 850 } 851 852 static void __team_queue_override_enabled_check(struct team *team) 853 { 854 struct team_port *port; 855 bool enabled = false; 856 857 list_for_each_entry(port, &team->port_list, list) { 858 if (port->queue_id) { 859 enabled = true; 860 break; 861 } 862 } 863 if (enabled == team->queue_override_enabled) 864 return; 865 netdev_dbg(team->dev, "%s queue override\n", 866 enabled ? "Enabling" : "Disabling"); 867 team->queue_override_enabled = enabled; 868 } 869 870 static void team_queue_override_port_prio_changed(struct team *team, 871 struct team_port *port) 872 { 873 if (!port->queue_id || team_port_enabled(port)) 874 return; 875 __team_queue_override_port_del(team, port); 876 __team_queue_override_port_add(team, port); 877 __team_queue_override_enabled_check(team); 878 } 879 880 static void team_queue_override_port_change_queue_id(struct team *team, 881 struct team_port *port, 882 u16 new_queue_id) 883 { 884 if (team_port_enabled(port)) { 885 __team_queue_override_port_del(team, port); 886 port->queue_id = new_queue_id; 887 __team_queue_override_port_add(team, port); 888 __team_queue_override_enabled_check(team); 889 } else { 890 port->queue_id = new_queue_id; 891 } 892 } 893 894 static void team_queue_override_port_add(struct team *team, 895 struct team_port *port) 896 { 897 __team_queue_override_port_add(team, port); 898 __team_queue_override_enabled_check(team); 899 } 900 901 static void team_queue_override_port_del(struct team *team, 902 struct team_port *port) 903 { 904 __team_queue_override_port_del(team, port); 905 __team_queue_override_enabled_check(team); 906 } 907 908 909 /**************** 910 * Port handling 911 ****************/ 912 913 static bool team_port_find(const struct team *team, 914 const struct team_port *port) 915 { 916 struct team_port *cur; 917 918 list_for_each_entry(cur, &team->port_list, list) 919 if (cur == port) 920 return true; 921 return false; 922 } 923 924 /* 925 * Enable/disable port by adding to enabled port hashlist and setting 926 * port->index (Might be racy so reader could see incorrect ifindex when 927 * processing a flying packet, but that is not a problem). Write guarded 928 * by team->lock. 929 */ 930 static void team_port_enable(struct team *team, 931 struct team_port *port) 932 { 933 if (team_port_enabled(port)) 934 return; 935 port->index = team->en_port_count++; 936 hlist_add_head_rcu(&port->hlist, 937 team_port_index_hash(team, port->index)); 938 team_adjust_ops(team); 939 team_queue_override_port_add(team, port); 940 if (team->ops.port_enabled) 941 team->ops.port_enabled(team, port); 942 team_notify_peers(team); 943 team_mcast_rejoin(team); 944 team_lower_state_changed(port); 945 } 946 947 static void __reconstruct_port_hlist(struct team *team, int rm_index) 948 { 949 int i; 950 struct team_port *port; 951 952 for (i = rm_index + 1; i < team->en_port_count; i++) { 953 port = team_get_port_by_index(team, i); 954 hlist_del_rcu(&port->hlist); 955 port->index--; 956 hlist_add_head_rcu(&port->hlist, 957 team_port_index_hash(team, port->index)); 958 } 959 } 960 961 static void team_port_disable(struct team *team, 962 struct team_port *port) 963 { 964 if (!team_port_enabled(port)) 965 return; 966 if (team->ops.port_disabled) 967 team->ops.port_disabled(team, port); 968 hlist_del_rcu(&port->hlist); 969 __reconstruct_port_hlist(team, port->index); 970 port->index = -1; 971 team->en_port_count--; 972 team_queue_override_port_del(team, port); 973 team_adjust_ops(team); 974 team_lower_state_changed(port); 975 } 976 977 #define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \ 978 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \ 979 NETIF_F_HIGHDMA | NETIF_F_LRO) 980 981 #define TEAM_ENC_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \ 982 NETIF_F_RXCSUM | NETIF_F_ALL_TSO) 983 984 static void __team_compute_features(struct team *team) 985 { 986 struct team_port *port; 987 netdev_features_t vlan_features = TEAM_VLAN_FEATURES & 988 NETIF_F_ALL_FOR_ALL; 989 netdev_features_t enc_features = TEAM_ENC_FEATURES; 990 unsigned short max_hard_header_len = ETH_HLEN; 991 unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE | 992 IFF_XMIT_DST_RELEASE_PERM; 993 994 list_for_each_entry(port, &team->port_list, list) { 995 vlan_features = netdev_increment_features(vlan_features, 996 port->dev->vlan_features, 997 TEAM_VLAN_FEATURES); 998 enc_features = 999 netdev_increment_features(enc_features, 1000 port->dev->hw_enc_features, 1001 TEAM_ENC_FEATURES); 1002 1003 1004 dst_release_flag &= port->dev->priv_flags; 1005 if (port->dev->hard_header_len > max_hard_header_len) 1006 max_hard_header_len = port->dev->hard_header_len; 1007 } 1008 1009 team->dev->vlan_features = vlan_features; 1010 team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL | 1011 NETIF_F_GSO_UDP_L4; 1012 team->dev->hard_header_len = max_hard_header_len; 1013 1014 team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; 1015 if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM)) 1016 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE; 1017 } 1018 1019 static void team_compute_features(struct team *team) 1020 { 1021 mutex_lock(&team->lock); 1022 __team_compute_features(team); 1023 mutex_unlock(&team->lock); 1024 netdev_change_features(team->dev); 1025 } 1026 1027 static int team_port_enter(struct team *team, struct team_port *port) 1028 { 1029 int err = 0; 1030 1031 dev_hold(team->dev); 1032 if (team->ops.port_enter) { 1033 err = team->ops.port_enter(team, port); 1034 if (err) { 1035 netdev_err(team->dev, "Device %s failed to enter team mode\n", 1036 port->dev->name); 1037 goto err_port_enter; 1038 } 1039 } 1040 1041 return 0; 1042 1043 err_port_enter: 1044 dev_put(team->dev); 1045 1046 return err; 1047 } 1048 1049 static void team_port_leave(struct team *team, struct team_port *port) 1050 { 1051 if (team->ops.port_leave) 1052 team->ops.port_leave(team, port); 1053 dev_put(team->dev); 1054 } 1055 1056 #ifdef CONFIG_NET_POLL_CONTROLLER 1057 static int __team_port_enable_netpoll(struct team_port *port) 1058 { 1059 struct netpoll *np; 1060 int err; 1061 1062 np = kzalloc(sizeof(*np), GFP_KERNEL); 1063 if (!np) 1064 return -ENOMEM; 1065 1066 err = __netpoll_setup(np, port->dev); 1067 if (err) { 1068 kfree(np); 1069 return err; 1070 } 1071 port->np = np; 1072 return err; 1073 } 1074 1075 static int team_port_enable_netpoll(struct team_port *port) 1076 { 1077 if (!port->team->dev->npinfo) 1078 return 0; 1079 1080 return __team_port_enable_netpoll(port); 1081 } 1082 1083 static void team_port_disable_netpoll(struct team_port *port) 1084 { 1085 struct netpoll *np = port->np; 1086 1087 if (!np) 1088 return; 1089 port->np = NULL; 1090 1091 __netpoll_free(np); 1092 } 1093 #else 1094 static int team_port_enable_netpoll(struct team_port *port) 1095 { 1096 return 0; 1097 } 1098 static void team_port_disable_netpoll(struct team_port *port) 1099 { 1100 } 1101 #endif 1102 1103 static int team_upper_dev_link(struct team *team, struct team_port *port, 1104 struct netlink_ext_ack *extack) 1105 { 1106 struct netdev_lag_upper_info lag_upper_info; 1107 int err; 1108 1109 lag_upper_info.tx_type = team->mode->lag_tx_type; 1110 lag_upper_info.hash_type = NETDEV_LAG_HASH_UNKNOWN; 1111 err = netdev_master_upper_dev_link(port->dev, team->dev, NULL, 1112 &lag_upper_info, extack); 1113 if (err) 1114 return err; 1115 port->dev->priv_flags |= IFF_TEAM_PORT; 1116 return 0; 1117 } 1118 1119 static void team_upper_dev_unlink(struct team *team, struct team_port *port) 1120 { 1121 netdev_upper_dev_unlink(port->dev, team->dev); 1122 port->dev->priv_flags &= ~IFF_TEAM_PORT; 1123 } 1124 1125 static void __team_port_change_port_added(struct team_port *port, bool linkup); 1126 static int team_dev_type_check_change(struct net_device *dev, 1127 struct net_device *port_dev); 1128 1129 static int team_port_add(struct team *team, struct net_device *port_dev, 1130 struct netlink_ext_ack *extack) 1131 { 1132 struct net_device *dev = team->dev; 1133 struct team_port *port; 1134 char *portname = port_dev->name; 1135 int err; 1136 1137 if (port_dev->flags & IFF_LOOPBACK) { 1138 NL_SET_ERR_MSG(extack, "Loopback device can't be added as a team port"); 1139 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n", 1140 portname); 1141 return -EINVAL; 1142 } 1143 1144 if (netif_is_team_port(port_dev)) { 1145 NL_SET_ERR_MSG(extack, "Device is already a port of a team device"); 1146 netdev_err(dev, "Device %s is already a port " 1147 "of a team device\n", portname); 1148 return -EBUSY; 1149 } 1150 1151 if (dev == port_dev) { 1152 NL_SET_ERR_MSG(extack, "Cannot enslave team device to itself"); 1153 netdev_err(dev, "Cannot enslave team device to itself\n"); 1154 return -EINVAL; 1155 } 1156 1157 if (netdev_has_upper_dev(dev, port_dev)) { 1158 NL_SET_ERR_MSG(extack, "Device is already an upper device of the team interface"); 1159 netdev_err(dev, "Device %s is already an upper device of the team interface\n", 1160 portname); 1161 return -EBUSY; 1162 } 1163 1164 if (port_dev->features & NETIF_F_VLAN_CHALLENGED && 1165 vlan_uses_dev(dev)) { 1166 NL_SET_ERR_MSG(extack, "Device is VLAN challenged and team device has VLAN set up"); 1167 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n", 1168 portname); 1169 return -EPERM; 1170 } 1171 1172 err = team_dev_type_check_change(dev, port_dev); 1173 if (err) 1174 return err; 1175 1176 if (port_dev->flags & IFF_UP) { 1177 NL_SET_ERR_MSG(extack, "Device is up. Set it down before adding it as a team port"); 1178 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n", 1179 portname); 1180 return -EBUSY; 1181 } 1182 1183 port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size, 1184 GFP_KERNEL); 1185 if (!port) 1186 return -ENOMEM; 1187 1188 port->dev = port_dev; 1189 port->team = team; 1190 INIT_LIST_HEAD(&port->qom_list); 1191 1192 port->orig.mtu = port_dev->mtu; 1193 err = dev_set_mtu(port_dev, dev->mtu); 1194 if (err) { 1195 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err); 1196 goto err_set_mtu; 1197 } 1198 1199 memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len); 1200 1201 err = team_port_enter(team, port); 1202 if (err) { 1203 netdev_err(dev, "Device %s failed to enter team mode\n", 1204 portname); 1205 goto err_port_enter; 1206 } 1207 1208 err = dev_open(port_dev, extack); 1209 if (err) { 1210 netdev_dbg(dev, "Device %s opening failed\n", 1211 portname); 1212 goto err_dev_open; 1213 } 1214 1215 err = vlan_vids_add_by_dev(port_dev, dev); 1216 if (err) { 1217 netdev_err(dev, "Failed to add vlan ids to device %s\n", 1218 portname); 1219 goto err_vids_add; 1220 } 1221 1222 err = team_port_enable_netpoll(port); 1223 if (err) { 1224 netdev_err(dev, "Failed to enable netpoll on device %s\n", 1225 portname); 1226 goto err_enable_netpoll; 1227 } 1228 1229 if (!(dev->features & NETIF_F_LRO)) 1230 dev_disable_lro(port_dev); 1231 1232 err = netdev_rx_handler_register(port_dev, team_handle_frame, 1233 port); 1234 if (err) { 1235 netdev_err(dev, "Device %s failed to register rx_handler\n", 1236 portname); 1237 goto err_handler_register; 1238 } 1239 1240 err = team_upper_dev_link(team, port, extack); 1241 if (err) { 1242 netdev_err(dev, "Device %s failed to set upper link\n", 1243 portname); 1244 goto err_set_upper_link; 1245 } 1246 1247 err = __team_option_inst_add_port(team, port); 1248 if (err) { 1249 netdev_err(dev, "Device %s failed to add per-port options\n", 1250 portname); 1251 goto err_option_port_add; 1252 } 1253 1254 /* set promiscuity level to new slave */ 1255 if (dev->flags & IFF_PROMISC) { 1256 err = dev_set_promiscuity(port_dev, 1); 1257 if (err) 1258 goto err_set_slave_promisc; 1259 } 1260 1261 /* set allmulti level to new slave */ 1262 if (dev->flags & IFF_ALLMULTI) { 1263 err = dev_set_allmulti(port_dev, 1); 1264 if (err) { 1265 if (dev->flags & IFF_PROMISC) 1266 dev_set_promiscuity(port_dev, -1); 1267 goto err_set_slave_promisc; 1268 } 1269 } 1270 1271 netif_addr_lock_bh(dev); 1272 dev_uc_sync_multiple(port_dev, dev); 1273 dev_mc_sync_multiple(port_dev, dev); 1274 netif_addr_unlock_bh(dev); 1275 1276 port->index = -1; 1277 list_add_tail_rcu(&port->list, &team->port_list); 1278 team_port_enable(team, port); 1279 __team_compute_features(team); 1280 __team_port_change_port_added(port, !!netif_oper_up(port_dev)); 1281 __team_options_change_check(team); 1282 1283 netdev_info(dev, "Port device %s added\n", portname); 1284 1285 return 0; 1286 1287 err_set_slave_promisc: 1288 __team_option_inst_del_port(team, port); 1289 1290 err_option_port_add: 1291 team_upper_dev_unlink(team, port); 1292 1293 err_set_upper_link: 1294 netdev_rx_handler_unregister(port_dev); 1295 1296 err_handler_register: 1297 team_port_disable_netpoll(port); 1298 1299 err_enable_netpoll: 1300 vlan_vids_del_by_dev(port_dev, dev); 1301 1302 err_vids_add: 1303 dev_close(port_dev); 1304 1305 err_dev_open: 1306 team_port_leave(team, port); 1307 team_port_set_orig_dev_addr(port); 1308 1309 err_port_enter: 1310 dev_set_mtu(port_dev, port->orig.mtu); 1311 1312 err_set_mtu: 1313 kfree(port); 1314 1315 return err; 1316 } 1317 1318 static void __team_port_change_port_removed(struct team_port *port); 1319 1320 static int team_port_del(struct team *team, struct net_device *port_dev) 1321 { 1322 struct net_device *dev = team->dev; 1323 struct team_port *port; 1324 char *portname = port_dev->name; 1325 1326 port = team_port_get_rtnl(port_dev); 1327 if (!port || !team_port_find(team, port)) { 1328 netdev_err(dev, "Device %s does not act as a port of this team\n", 1329 portname); 1330 return -ENOENT; 1331 } 1332 1333 team_port_disable(team, port); 1334 list_del_rcu(&port->list); 1335 1336 if (dev->flags & IFF_PROMISC) 1337 dev_set_promiscuity(port_dev, -1); 1338 if (dev->flags & IFF_ALLMULTI) 1339 dev_set_allmulti(port_dev, -1); 1340 1341 team_upper_dev_unlink(team, port); 1342 netdev_rx_handler_unregister(port_dev); 1343 team_port_disable_netpoll(port); 1344 vlan_vids_del_by_dev(port_dev, dev); 1345 dev_uc_unsync(port_dev, dev); 1346 dev_mc_unsync(port_dev, dev); 1347 dev_close(port_dev); 1348 team_port_leave(team, port); 1349 1350 __team_option_inst_mark_removed_port(team, port); 1351 __team_options_change_check(team); 1352 __team_option_inst_del_port(team, port); 1353 __team_port_change_port_removed(port); 1354 1355 team_port_set_orig_dev_addr(port); 1356 dev_set_mtu(port_dev, port->orig.mtu); 1357 kfree_rcu(port, rcu); 1358 netdev_info(dev, "Port device %s removed\n", portname); 1359 __team_compute_features(team); 1360 1361 return 0; 1362 } 1363 1364 1365 /***************** 1366 * Net device ops 1367 *****************/ 1368 1369 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx) 1370 { 1371 ctx->data.str_val = team->mode->kind; 1372 return 0; 1373 } 1374 1375 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx) 1376 { 1377 return team_change_mode(team, ctx->data.str_val); 1378 } 1379 1380 static int team_notify_peers_count_get(struct team *team, 1381 struct team_gsetter_ctx *ctx) 1382 { 1383 ctx->data.u32_val = team->notify_peers.count; 1384 return 0; 1385 } 1386 1387 static int team_notify_peers_count_set(struct team *team, 1388 struct team_gsetter_ctx *ctx) 1389 { 1390 team->notify_peers.count = ctx->data.u32_val; 1391 return 0; 1392 } 1393 1394 static int team_notify_peers_interval_get(struct team *team, 1395 struct team_gsetter_ctx *ctx) 1396 { 1397 ctx->data.u32_val = team->notify_peers.interval; 1398 return 0; 1399 } 1400 1401 static int team_notify_peers_interval_set(struct team *team, 1402 struct team_gsetter_ctx *ctx) 1403 { 1404 team->notify_peers.interval = ctx->data.u32_val; 1405 return 0; 1406 } 1407 1408 static int team_mcast_rejoin_count_get(struct team *team, 1409 struct team_gsetter_ctx *ctx) 1410 { 1411 ctx->data.u32_val = team->mcast_rejoin.count; 1412 return 0; 1413 } 1414 1415 static int team_mcast_rejoin_count_set(struct team *team, 1416 struct team_gsetter_ctx *ctx) 1417 { 1418 team->mcast_rejoin.count = ctx->data.u32_val; 1419 return 0; 1420 } 1421 1422 static int team_mcast_rejoin_interval_get(struct team *team, 1423 struct team_gsetter_ctx *ctx) 1424 { 1425 ctx->data.u32_val = team->mcast_rejoin.interval; 1426 return 0; 1427 } 1428 1429 static int team_mcast_rejoin_interval_set(struct team *team, 1430 struct team_gsetter_ctx *ctx) 1431 { 1432 team->mcast_rejoin.interval = ctx->data.u32_val; 1433 return 0; 1434 } 1435 1436 static int team_port_en_option_get(struct team *team, 1437 struct team_gsetter_ctx *ctx) 1438 { 1439 struct team_port *port = ctx->info->port; 1440 1441 ctx->data.bool_val = team_port_enabled(port); 1442 return 0; 1443 } 1444 1445 static int team_port_en_option_set(struct team *team, 1446 struct team_gsetter_ctx *ctx) 1447 { 1448 struct team_port *port = ctx->info->port; 1449 1450 if (ctx->data.bool_val) 1451 team_port_enable(team, port); 1452 else 1453 team_port_disable(team, port); 1454 return 0; 1455 } 1456 1457 static int team_user_linkup_option_get(struct team *team, 1458 struct team_gsetter_ctx *ctx) 1459 { 1460 struct team_port *port = ctx->info->port; 1461 1462 ctx->data.bool_val = port->user.linkup; 1463 return 0; 1464 } 1465 1466 static void __team_carrier_check(struct team *team); 1467 1468 static int team_user_linkup_option_set(struct team *team, 1469 struct team_gsetter_ctx *ctx) 1470 { 1471 struct team_port *port = ctx->info->port; 1472 1473 port->user.linkup = ctx->data.bool_val; 1474 team_refresh_port_linkup(port); 1475 __team_carrier_check(port->team); 1476 return 0; 1477 } 1478 1479 static int team_user_linkup_en_option_get(struct team *team, 1480 struct team_gsetter_ctx *ctx) 1481 { 1482 struct team_port *port = ctx->info->port; 1483 1484 ctx->data.bool_val = port->user.linkup_enabled; 1485 return 0; 1486 } 1487 1488 static int team_user_linkup_en_option_set(struct team *team, 1489 struct team_gsetter_ctx *ctx) 1490 { 1491 struct team_port *port = ctx->info->port; 1492 1493 port->user.linkup_enabled = ctx->data.bool_val; 1494 team_refresh_port_linkup(port); 1495 __team_carrier_check(port->team); 1496 return 0; 1497 } 1498 1499 static int team_priority_option_get(struct team *team, 1500 struct team_gsetter_ctx *ctx) 1501 { 1502 struct team_port *port = ctx->info->port; 1503 1504 ctx->data.s32_val = port->priority; 1505 return 0; 1506 } 1507 1508 static int team_priority_option_set(struct team *team, 1509 struct team_gsetter_ctx *ctx) 1510 { 1511 struct team_port *port = ctx->info->port; 1512 s32 priority = ctx->data.s32_val; 1513 1514 if (port->priority == priority) 1515 return 0; 1516 port->priority = priority; 1517 team_queue_override_port_prio_changed(team, port); 1518 return 0; 1519 } 1520 1521 static int team_queue_id_option_get(struct team *team, 1522 struct team_gsetter_ctx *ctx) 1523 { 1524 struct team_port *port = ctx->info->port; 1525 1526 ctx->data.u32_val = port->queue_id; 1527 return 0; 1528 } 1529 1530 static int team_queue_id_option_set(struct team *team, 1531 struct team_gsetter_ctx *ctx) 1532 { 1533 struct team_port *port = ctx->info->port; 1534 u16 new_queue_id = ctx->data.u32_val; 1535 1536 if (port->queue_id == new_queue_id) 1537 return 0; 1538 if (new_queue_id >= team->dev->real_num_tx_queues) 1539 return -EINVAL; 1540 team_queue_override_port_change_queue_id(team, port, new_queue_id); 1541 return 0; 1542 } 1543 1544 static const struct team_option team_options[] = { 1545 { 1546 .name = "mode", 1547 .type = TEAM_OPTION_TYPE_STRING, 1548 .getter = team_mode_option_get, 1549 .setter = team_mode_option_set, 1550 }, 1551 { 1552 .name = "notify_peers_count", 1553 .type = TEAM_OPTION_TYPE_U32, 1554 .getter = team_notify_peers_count_get, 1555 .setter = team_notify_peers_count_set, 1556 }, 1557 { 1558 .name = "notify_peers_interval", 1559 .type = TEAM_OPTION_TYPE_U32, 1560 .getter = team_notify_peers_interval_get, 1561 .setter = team_notify_peers_interval_set, 1562 }, 1563 { 1564 .name = "mcast_rejoin_count", 1565 .type = TEAM_OPTION_TYPE_U32, 1566 .getter = team_mcast_rejoin_count_get, 1567 .setter = team_mcast_rejoin_count_set, 1568 }, 1569 { 1570 .name = "mcast_rejoin_interval", 1571 .type = TEAM_OPTION_TYPE_U32, 1572 .getter = team_mcast_rejoin_interval_get, 1573 .setter = team_mcast_rejoin_interval_set, 1574 }, 1575 { 1576 .name = "enabled", 1577 .type = TEAM_OPTION_TYPE_BOOL, 1578 .per_port = true, 1579 .getter = team_port_en_option_get, 1580 .setter = team_port_en_option_set, 1581 }, 1582 { 1583 .name = "user_linkup", 1584 .type = TEAM_OPTION_TYPE_BOOL, 1585 .per_port = true, 1586 .getter = team_user_linkup_option_get, 1587 .setter = team_user_linkup_option_set, 1588 }, 1589 { 1590 .name = "user_linkup_enabled", 1591 .type = TEAM_OPTION_TYPE_BOOL, 1592 .per_port = true, 1593 .getter = team_user_linkup_en_option_get, 1594 .setter = team_user_linkup_en_option_set, 1595 }, 1596 { 1597 .name = "priority", 1598 .type = TEAM_OPTION_TYPE_S32, 1599 .per_port = true, 1600 .getter = team_priority_option_get, 1601 .setter = team_priority_option_set, 1602 }, 1603 { 1604 .name = "queue_id", 1605 .type = TEAM_OPTION_TYPE_U32, 1606 .per_port = true, 1607 .getter = team_queue_id_option_get, 1608 .setter = team_queue_id_option_set, 1609 }, 1610 }; 1611 1612 1613 static int team_init(struct net_device *dev) 1614 { 1615 struct team *team = netdev_priv(dev); 1616 int i; 1617 int err; 1618 1619 team->dev = dev; 1620 mutex_init(&team->lock); 1621 team_set_no_mode(team); 1622 1623 team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats); 1624 if (!team->pcpu_stats) 1625 return -ENOMEM; 1626 1627 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++) 1628 INIT_HLIST_HEAD(&team->en_port_hlist[i]); 1629 INIT_LIST_HEAD(&team->port_list); 1630 err = team_queue_override_init(team); 1631 if (err) 1632 goto err_team_queue_override_init; 1633 1634 team_adjust_ops(team); 1635 1636 INIT_LIST_HEAD(&team->option_list); 1637 INIT_LIST_HEAD(&team->option_inst_list); 1638 1639 team_notify_peers_init(team); 1640 team_mcast_rejoin_init(team); 1641 1642 err = team_options_register(team, team_options, ARRAY_SIZE(team_options)); 1643 if (err) 1644 goto err_options_register; 1645 netif_carrier_off(dev); 1646 1647 netdev_lockdep_set_classes(dev); 1648 1649 return 0; 1650 1651 err_options_register: 1652 team_mcast_rejoin_fini(team); 1653 team_notify_peers_fini(team); 1654 team_queue_override_fini(team); 1655 err_team_queue_override_init: 1656 free_percpu(team->pcpu_stats); 1657 1658 return err; 1659 } 1660 1661 static void team_uninit(struct net_device *dev) 1662 { 1663 struct team *team = netdev_priv(dev); 1664 struct team_port *port; 1665 struct team_port *tmp; 1666 1667 mutex_lock(&team->lock); 1668 list_for_each_entry_safe(port, tmp, &team->port_list, list) 1669 team_port_del(team, port->dev); 1670 1671 __team_change_mode(team, NULL); /* cleanup */ 1672 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options)); 1673 team_mcast_rejoin_fini(team); 1674 team_notify_peers_fini(team); 1675 team_queue_override_fini(team); 1676 mutex_unlock(&team->lock); 1677 netdev_change_features(dev); 1678 } 1679 1680 static void team_destructor(struct net_device *dev) 1681 { 1682 struct team *team = netdev_priv(dev); 1683 1684 free_percpu(team->pcpu_stats); 1685 } 1686 1687 static int team_open(struct net_device *dev) 1688 { 1689 return 0; 1690 } 1691 1692 static int team_close(struct net_device *dev) 1693 { 1694 return 0; 1695 } 1696 1697 /* 1698 * note: already called with rcu_read_lock 1699 */ 1700 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev) 1701 { 1702 struct team *team = netdev_priv(dev); 1703 bool tx_success; 1704 unsigned int len = skb->len; 1705 1706 tx_success = team_queue_override_transmit(team, skb); 1707 if (!tx_success) 1708 tx_success = team->ops.transmit(team, skb); 1709 if (tx_success) { 1710 struct team_pcpu_stats *pcpu_stats; 1711 1712 pcpu_stats = this_cpu_ptr(team->pcpu_stats); 1713 u64_stats_update_begin(&pcpu_stats->syncp); 1714 pcpu_stats->tx_packets++; 1715 pcpu_stats->tx_bytes += len; 1716 u64_stats_update_end(&pcpu_stats->syncp); 1717 } else { 1718 this_cpu_inc(team->pcpu_stats->tx_dropped); 1719 } 1720 1721 return NETDEV_TX_OK; 1722 } 1723 1724 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb, 1725 struct net_device *sb_dev) 1726 { 1727 /* 1728 * This helper function exists to help dev_pick_tx get the correct 1729 * destination queue. Using a helper function skips a call to 1730 * skb_tx_hash and will put the skbs in the queue we expect on their 1731 * way down to the team driver. 1732 */ 1733 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0; 1734 1735 /* 1736 * Save the original txq to restore before passing to the driver 1737 */ 1738 qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping; 1739 1740 if (unlikely(txq >= dev->real_num_tx_queues)) { 1741 do { 1742 txq -= dev->real_num_tx_queues; 1743 } while (txq >= dev->real_num_tx_queues); 1744 } 1745 return txq; 1746 } 1747 1748 static void team_change_rx_flags(struct net_device *dev, int change) 1749 { 1750 struct team *team = netdev_priv(dev); 1751 struct team_port *port; 1752 int inc; 1753 1754 rcu_read_lock(); 1755 list_for_each_entry_rcu(port, &team->port_list, list) { 1756 if (change & IFF_PROMISC) { 1757 inc = dev->flags & IFF_PROMISC ? 1 : -1; 1758 dev_set_promiscuity(port->dev, inc); 1759 } 1760 if (change & IFF_ALLMULTI) { 1761 inc = dev->flags & IFF_ALLMULTI ? 1 : -1; 1762 dev_set_allmulti(port->dev, inc); 1763 } 1764 } 1765 rcu_read_unlock(); 1766 } 1767 1768 static void team_set_rx_mode(struct net_device *dev) 1769 { 1770 struct team *team = netdev_priv(dev); 1771 struct team_port *port; 1772 1773 rcu_read_lock(); 1774 list_for_each_entry_rcu(port, &team->port_list, list) { 1775 dev_uc_sync_multiple(port->dev, dev); 1776 dev_mc_sync_multiple(port->dev, dev); 1777 } 1778 rcu_read_unlock(); 1779 } 1780 1781 static int team_set_mac_address(struct net_device *dev, void *p) 1782 { 1783 struct sockaddr *addr = p; 1784 struct team *team = netdev_priv(dev); 1785 struct team_port *port; 1786 1787 if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data)) 1788 return -EADDRNOTAVAIL; 1789 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); 1790 mutex_lock(&team->lock); 1791 list_for_each_entry(port, &team->port_list, list) 1792 if (team->ops.port_change_dev_addr) 1793 team->ops.port_change_dev_addr(team, port); 1794 mutex_unlock(&team->lock); 1795 return 0; 1796 } 1797 1798 static int team_change_mtu(struct net_device *dev, int new_mtu) 1799 { 1800 struct team *team = netdev_priv(dev); 1801 struct team_port *port; 1802 int err; 1803 1804 /* 1805 * Alhough this is reader, it's guarded by team lock. It's not possible 1806 * to traverse list in reverse under rcu_read_lock 1807 */ 1808 mutex_lock(&team->lock); 1809 team->port_mtu_change_allowed = true; 1810 list_for_each_entry(port, &team->port_list, list) { 1811 err = dev_set_mtu(port->dev, new_mtu); 1812 if (err) { 1813 netdev_err(dev, "Device %s failed to change mtu", 1814 port->dev->name); 1815 goto unwind; 1816 } 1817 } 1818 team->port_mtu_change_allowed = false; 1819 mutex_unlock(&team->lock); 1820 1821 dev->mtu = new_mtu; 1822 1823 return 0; 1824 1825 unwind: 1826 list_for_each_entry_continue_reverse(port, &team->port_list, list) 1827 dev_set_mtu(port->dev, dev->mtu); 1828 team->port_mtu_change_allowed = false; 1829 mutex_unlock(&team->lock); 1830 1831 return err; 1832 } 1833 1834 static void 1835 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 1836 { 1837 struct team *team = netdev_priv(dev); 1838 struct team_pcpu_stats *p; 1839 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes; 1840 u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0; 1841 unsigned int start; 1842 int i; 1843 1844 for_each_possible_cpu(i) { 1845 p = per_cpu_ptr(team->pcpu_stats, i); 1846 do { 1847 start = u64_stats_fetch_begin_irq(&p->syncp); 1848 rx_packets = p->rx_packets; 1849 rx_bytes = p->rx_bytes; 1850 rx_multicast = p->rx_multicast; 1851 tx_packets = p->tx_packets; 1852 tx_bytes = p->tx_bytes; 1853 } while (u64_stats_fetch_retry_irq(&p->syncp, start)); 1854 1855 stats->rx_packets += rx_packets; 1856 stats->rx_bytes += rx_bytes; 1857 stats->multicast += rx_multicast; 1858 stats->tx_packets += tx_packets; 1859 stats->tx_bytes += tx_bytes; 1860 /* 1861 * rx_dropped, tx_dropped & rx_nohandler are u32, 1862 * updated without syncp protection. 1863 */ 1864 rx_dropped += p->rx_dropped; 1865 tx_dropped += p->tx_dropped; 1866 rx_nohandler += p->rx_nohandler; 1867 } 1868 stats->rx_dropped = rx_dropped; 1869 stats->tx_dropped = tx_dropped; 1870 stats->rx_nohandler = rx_nohandler; 1871 } 1872 1873 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) 1874 { 1875 struct team *team = netdev_priv(dev); 1876 struct team_port *port; 1877 int err; 1878 1879 /* 1880 * Alhough this is reader, it's guarded by team lock. It's not possible 1881 * to traverse list in reverse under rcu_read_lock 1882 */ 1883 mutex_lock(&team->lock); 1884 list_for_each_entry(port, &team->port_list, list) { 1885 err = vlan_vid_add(port->dev, proto, vid); 1886 if (err) 1887 goto unwind; 1888 } 1889 mutex_unlock(&team->lock); 1890 1891 return 0; 1892 1893 unwind: 1894 list_for_each_entry_continue_reverse(port, &team->port_list, list) 1895 vlan_vid_del(port->dev, proto, vid); 1896 mutex_unlock(&team->lock); 1897 1898 return err; 1899 } 1900 1901 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid) 1902 { 1903 struct team *team = netdev_priv(dev); 1904 struct team_port *port; 1905 1906 mutex_lock(&team->lock); 1907 list_for_each_entry(port, &team->port_list, list) 1908 vlan_vid_del(port->dev, proto, vid); 1909 mutex_unlock(&team->lock); 1910 1911 return 0; 1912 } 1913 1914 #ifdef CONFIG_NET_POLL_CONTROLLER 1915 static void team_poll_controller(struct net_device *dev) 1916 { 1917 } 1918 1919 static void __team_netpoll_cleanup(struct team *team) 1920 { 1921 struct team_port *port; 1922 1923 list_for_each_entry(port, &team->port_list, list) 1924 team_port_disable_netpoll(port); 1925 } 1926 1927 static void team_netpoll_cleanup(struct net_device *dev) 1928 { 1929 struct team *team = netdev_priv(dev); 1930 1931 mutex_lock(&team->lock); 1932 __team_netpoll_cleanup(team); 1933 mutex_unlock(&team->lock); 1934 } 1935 1936 static int team_netpoll_setup(struct net_device *dev, 1937 struct netpoll_info *npifo) 1938 { 1939 struct team *team = netdev_priv(dev); 1940 struct team_port *port; 1941 int err = 0; 1942 1943 mutex_lock(&team->lock); 1944 list_for_each_entry(port, &team->port_list, list) { 1945 err = __team_port_enable_netpoll(port); 1946 if (err) { 1947 __team_netpoll_cleanup(team); 1948 break; 1949 } 1950 } 1951 mutex_unlock(&team->lock); 1952 return err; 1953 } 1954 #endif 1955 1956 static int team_add_slave(struct net_device *dev, struct net_device *port_dev, 1957 struct netlink_ext_ack *extack) 1958 { 1959 struct team *team = netdev_priv(dev); 1960 int err; 1961 1962 mutex_lock(&team->lock); 1963 err = team_port_add(team, port_dev, extack); 1964 mutex_unlock(&team->lock); 1965 1966 if (!err) 1967 netdev_change_features(dev); 1968 1969 return err; 1970 } 1971 1972 static int team_del_slave(struct net_device *dev, struct net_device *port_dev) 1973 { 1974 struct team *team = netdev_priv(dev); 1975 int err; 1976 1977 mutex_lock(&team->lock); 1978 err = team_port_del(team, port_dev); 1979 mutex_unlock(&team->lock); 1980 1981 if (!err) 1982 netdev_change_features(dev); 1983 1984 return err; 1985 } 1986 1987 static netdev_features_t team_fix_features(struct net_device *dev, 1988 netdev_features_t features) 1989 { 1990 struct team_port *port; 1991 struct team *team = netdev_priv(dev); 1992 netdev_features_t mask; 1993 1994 mask = features; 1995 features &= ~NETIF_F_ONE_FOR_ALL; 1996 features |= NETIF_F_ALL_FOR_ALL; 1997 1998 rcu_read_lock(); 1999 list_for_each_entry_rcu(port, &team->port_list, list) { 2000 features = netdev_increment_features(features, 2001 port->dev->features, 2002 mask); 2003 } 2004 rcu_read_unlock(); 2005 2006 features = netdev_add_tso_features(features, mask); 2007 2008 return features; 2009 } 2010 2011 static int team_change_carrier(struct net_device *dev, bool new_carrier) 2012 { 2013 struct team *team = netdev_priv(dev); 2014 2015 team->user_carrier_enabled = true; 2016 2017 if (new_carrier) 2018 netif_carrier_on(dev); 2019 else 2020 netif_carrier_off(dev); 2021 return 0; 2022 } 2023 2024 static const struct net_device_ops team_netdev_ops = { 2025 .ndo_init = team_init, 2026 .ndo_uninit = team_uninit, 2027 .ndo_open = team_open, 2028 .ndo_stop = team_close, 2029 .ndo_start_xmit = team_xmit, 2030 .ndo_select_queue = team_select_queue, 2031 .ndo_change_rx_flags = team_change_rx_flags, 2032 .ndo_set_rx_mode = team_set_rx_mode, 2033 .ndo_set_mac_address = team_set_mac_address, 2034 .ndo_change_mtu = team_change_mtu, 2035 .ndo_get_stats64 = team_get_stats64, 2036 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid, 2037 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid, 2038 #ifdef CONFIG_NET_POLL_CONTROLLER 2039 .ndo_poll_controller = team_poll_controller, 2040 .ndo_netpoll_setup = team_netpoll_setup, 2041 .ndo_netpoll_cleanup = team_netpoll_cleanup, 2042 #endif 2043 .ndo_add_slave = team_add_slave, 2044 .ndo_del_slave = team_del_slave, 2045 .ndo_fix_features = team_fix_features, 2046 .ndo_change_carrier = team_change_carrier, 2047 .ndo_features_check = passthru_features_check, 2048 }; 2049 2050 /*********************** 2051 * ethtool interface 2052 ***********************/ 2053 2054 static void team_ethtool_get_drvinfo(struct net_device *dev, 2055 struct ethtool_drvinfo *drvinfo) 2056 { 2057 strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver)); 2058 strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version)); 2059 } 2060 2061 static const struct ethtool_ops team_ethtool_ops = { 2062 .get_drvinfo = team_ethtool_get_drvinfo, 2063 .get_link = ethtool_op_get_link, 2064 }; 2065 2066 /*********************** 2067 * rt netlink interface 2068 ***********************/ 2069 2070 static void team_setup_by_port(struct net_device *dev, 2071 struct net_device *port_dev) 2072 { 2073 dev->header_ops = port_dev->header_ops; 2074 dev->type = port_dev->type; 2075 dev->hard_header_len = port_dev->hard_header_len; 2076 dev->addr_len = port_dev->addr_len; 2077 dev->mtu = port_dev->mtu; 2078 memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len); 2079 eth_hw_addr_inherit(dev, port_dev); 2080 } 2081 2082 static int team_dev_type_check_change(struct net_device *dev, 2083 struct net_device *port_dev) 2084 { 2085 struct team *team = netdev_priv(dev); 2086 char *portname = port_dev->name; 2087 int err; 2088 2089 if (dev->type == port_dev->type) 2090 return 0; 2091 if (!list_empty(&team->port_list)) { 2092 netdev_err(dev, "Device %s is of different type\n", portname); 2093 return -EBUSY; 2094 } 2095 err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev); 2096 err = notifier_to_errno(err); 2097 if (err) { 2098 netdev_err(dev, "Refused to change device type\n"); 2099 return err; 2100 } 2101 dev_uc_flush(dev); 2102 dev_mc_flush(dev); 2103 team_setup_by_port(dev, port_dev); 2104 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev); 2105 return 0; 2106 } 2107 2108 static void team_setup(struct net_device *dev) 2109 { 2110 ether_setup(dev); 2111 dev->max_mtu = ETH_MAX_MTU; 2112 2113 dev->netdev_ops = &team_netdev_ops; 2114 dev->ethtool_ops = &team_ethtool_ops; 2115 dev->needs_free_netdev = true; 2116 dev->priv_destructor = team_destructor; 2117 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); 2118 dev->priv_flags |= IFF_NO_QUEUE; 2119 dev->priv_flags |= IFF_TEAM; 2120 2121 /* 2122 * Indicate we support unicast address filtering. That way core won't 2123 * bring us to promisc mode in case a unicast addr is added. 2124 * Let this up to underlay drivers. 2125 */ 2126 dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE; 2127 2128 dev->features |= NETIF_F_LLTX; 2129 dev->features |= NETIF_F_GRO; 2130 2131 /* Don't allow team devices to change network namespaces. */ 2132 dev->features |= NETIF_F_NETNS_LOCAL; 2133 2134 dev->hw_features = TEAM_VLAN_FEATURES | 2135 NETIF_F_HW_VLAN_CTAG_TX | 2136 NETIF_F_HW_VLAN_CTAG_RX | 2137 NETIF_F_HW_VLAN_CTAG_FILTER; 2138 2139 dev->hw_features |= NETIF_F_GSO_ENCAP_ALL | NETIF_F_GSO_UDP_L4; 2140 dev->features |= dev->hw_features; 2141 } 2142 2143 static int team_newlink(struct net *src_net, struct net_device *dev, 2144 struct nlattr *tb[], struct nlattr *data[], 2145 struct netlink_ext_ack *extack) 2146 { 2147 if (tb[IFLA_ADDRESS] == NULL) 2148 eth_hw_addr_random(dev); 2149 2150 return register_netdevice(dev); 2151 } 2152 2153 static int team_validate(struct nlattr *tb[], struct nlattr *data[], 2154 struct netlink_ext_ack *extack) 2155 { 2156 if (tb[IFLA_ADDRESS]) { 2157 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) 2158 return -EINVAL; 2159 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) 2160 return -EADDRNOTAVAIL; 2161 } 2162 return 0; 2163 } 2164 2165 static unsigned int team_get_num_tx_queues(void) 2166 { 2167 return TEAM_DEFAULT_NUM_TX_QUEUES; 2168 } 2169 2170 static unsigned int team_get_num_rx_queues(void) 2171 { 2172 return TEAM_DEFAULT_NUM_RX_QUEUES; 2173 } 2174 2175 static struct rtnl_link_ops team_link_ops __read_mostly = { 2176 .kind = DRV_NAME, 2177 .priv_size = sizeof(struct team), 2178 .setup = team_setup, 2179 .newlink = team_newlink, 2180 .validate = team_validate, 2181 .get_num_tx_queues = team_get_num_tx_queues, 2182 .get_num_rx_queues = team_get_num_rx_queues, 2183 }; 2184 2185 2186 /*********************************** 2187 * Generic netlink custom interface 2188 ***********************************/ 2189 2190 static struct genl_family team_nl_family; 2191 2192 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = { 2193 [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, }, 2194 [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 }, 2195 [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED }, 2196 [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED }, 2197 }; 2198 2199 static const struct nla_policy 2200 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = { 2201 [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, }, 2202 [TEAM_ATTR_OPTION_NAME] = { 2203 .type = NLA_STRING, 2204 .len = TEAM_STRING_MAX_LEN, 2205 }, 2206 [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG }, 2207 [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 }, 2208 [TEAM_ATTR_OPTION_DATA] = { .type = NLA_BINARY }, 2209 }; 2210 2211 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info) 2212 { 2213 struct sk_buff *msg; 2214 void *hdr; 2215 int err; 2216 2217 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 2218 if (!msg) 2219 return -ENOMEM; 2220 2221 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq, 2222 &team_nl_family, 0, TEAM_CMD_NOOP); 2223 if (!hdr) { 2224 err = -EMSGSIZE; 2225 goto err_msg_put; 2226 } 2227 2228 genlmsg_end(msg, hdr); 2229 2230 return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid); 2231 2232 err_msg_put: 2233 nlmsg_free(msg); 2234 2235 return err; 2236 } 2237 2238 /* 2239 * Netlink cmd functions should be locked by following two functions. 2240 * Since dev gets held here, that ensures dev won't disappear in between. 2241 */ 2242 static struct team *team_nl_team_get(struct genl_info *info) 2243 { 2244 struct net *net = genl_info_net(info); 2245 int ifindex; 2246 struct net_device *dev; 2247 struct team *team; 2248 2249 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX]) 2250 return NULL; 2251 2252 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]); 2253 dev = dev_get_by_index(net, ifindex); 2254 if (!dev || dev->netdev_ops != &team_netdev_ops) { 2255 if (dev) 2256 dev_put(dev); 2257 return NULL; 2258 } 2259 2260 team = netdev_priv(dev); 2261 mutex_lock(&team->lock); 2262 return team; 2263 } 2264 2265 static void team_nl_team_put(struct team *team) 2266 { 2267 mutex_unlock(&team->lock); 2268 dev_put(team->dev); 2269 } 2270 2271 typedef int team_nl_send_func_t(struct sk_buff *skb, 2272 struct team *team, u32 portid); 2273 2274 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid) 2275 { 2276 return genlmsg_unicast(dev_net(team->dev), skb, portid); 2277 } 2278 2279 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team, 2280 struct team_option_inst *opt_inst) 2281 { 2282 struct nlattr *option_item; 2283 struct team_option *option = opt_inst->option; 2284 struct team_option_inst_info *opt_inst_info = &opt_inst->info; 2285 struct team_gsetter_ctx ctx; 2286 int err; 2287 2288 ctx.info = opt_inst_info; 2289 err = team_option_get(team, opt_inst, &ctx); 2290 if (err) 2291 return err; 2292 2293 option_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_OPTION); 2294 if (!option_item) 2295 return -EMSGSIZE; 2296 2297 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name)) 2298 goto nest_cancel; 2299 if (opt_inst_info->port && 2300 nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX, 2301 opt_inst_info->port->dev->ifindex)) 2302 goto nest_cancel; 2303 if (opt_inst->option->array_size && 2304 nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX, 2305 opt_inst_info->array_index)) 2306 goto nest_cancel; 2307 2308 switch (option->type) { 2309 case TEAM_OPTION_TYPE_U32: 2310 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32)) 2311 goto nest_cancel; 2312 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val)) 2313 goto nest_cancel; 2314 break; 2315 case TEAM_OPTION_TYPE_STRING: 2316 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING)) 2317 goto nest_cancel; 2318 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA, 2319 ctx.data.str_val)) 2320 goto nest_cancel; 2321 break; 2322 case TEAM_OPTION_TYPE_BINARY: 2323 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY)) 2324 goto nest_cancel; 2325 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len, 2326 ctx.data.bin_val.ptr)) 2327 goto nest_cancel; 2328 break; 2329 case TEAM_OPTION_TYPE_BOOL: 2330 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG)) 2331 goto nest_cancel; 2332 if (ctx.data.bool_val && 2333 nla_put_flag(skb, TEAM_ATTR_OPTION_DATA)) 2334 goto nest_cancel; 2335 break; 2336 case TEAM_OPTION_TYPE_S32: 2337 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32)) 2338 goto nest_cancel; 2339 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val)) 2340 goto nest_cancel; 2341 break; 2342 default: 2343 BUG(); 2344 } 2345 if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED)) 2346 goto nest_cancel; 2347 if (opt_inst->changed) { 2348 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED)) 2349 goto nest_cancel; 2350 opt_inst->changed = false; 2351 } 2352 nla_nest_end(skb, option_item); 2353 return 0; 2354 2355 nest_cancel: 2356 nla_nest_cancel(skb, option_item); 2357 return -EMSGSIZE; 2358 } 2359 2360 static int __send_and_alloc_skb(struct sk_buff **pskb, 2361 struct team *team, u32 portid, 2362 team_nl_send_func_t *send_func) 2363 { 2364 int err; 2365 2366 if (*pskb) { 2367 err = send_func(*pskb, team, portid); 2368 if (err) 2369 return err; 2370 } 2371 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL); 2372 if (!*pskb) 2373 return -ENOMEM; 2374 return 0; 2375 } 2376 2377 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq, 2378 int flags, team_nl_send_func_t *send_func, 2379 struct list_head *sel_opt_inst_list) 2380 { 2381 struct nlattr *option_list; 2382 struct nlmsghdr *nlh; 2383 void *hdr; 2384 struct team_option_inst *opt_inst; 2385 int err; 2386 struct sk_buff *skb = NULL; 2387 bool incomplete; 2388 int i; 2389 2390 opt_inst = list_first_entry(sel_opt_inst_list, 2391 struct team_option_inst, tmp_list); 2392 2393 start_again: 2394 err = __send_and_alloc_skb(&skb, team, portid, send_func); 2395 if (err) 2396 return err; 2397 2398 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI, 2399 TEAM_CMD_OPTIONS_GET); 2400 if (!hdr) { 2401 nlmsg_free(skb); 2402 return -EMSGSIZE; 2403 } 2404 2405 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex)) 2406 goto nla_put_failure; 2407 option_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_OPTION); 2408 if (!option_list) 2409 goto nla_put_failure; 2410 2411 i = 0; 2412 incomplete = false; 2413 list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) { 2414 err = team_nl_fill_one_option_get(skb, team, opt_inst); 2415 if (err) { 2416 if (err == -EMSGSIZE) { 2417 if (!i) 2418 goto errout; 2419 incomplete = true; 2420 break; 2421 } 2422 goto errout; 2423 } 2424 i++; 2425 } 2426 2427 nla_nest_end(skb, option_list); 2428 genlmsg_end(skb, hdr); 2429 if (incomplete) 2430 goto start_again; 2431 2432 send_done: 2433 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI); 2434 if (!nlh) { 2435 err = __send_and_alloc_skb(&skb, team, portid, send_func); 2436 if (err) 2437 return err; 2438 goto send_done; 2439 } 2440 2441 return send_func(skb, team, portid); 2442 2443 nla_put_failure: 2444 err = -EMSGSIZE; 2445 errout: 2446 nlmsg_free(skb); 2447 return err; 2448 } 2449 2450 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info) 2451 { 2452 struct team *team; 2453 struct team_option_inst *opt_inst; 2454 int err; 2455 LIST_HEAD(sel_opt_inst_list); 2456 2457 team = team_nl_team_get(info); 2458 if (!team) 2459 return -EINVAL; 2460 2461 list_for_each_entry(opt_inst, &team->option_inst_list, list) 2462 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list); 2463 err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq, 2464 NLM_F_ACK, team_nl_send_unicast, 2465 &sel_opt_inst_list); 2466 2467 team_nl_team_put(team); 2468 2469 return err; 2470 } 2471 2472 static int team_nl_send_event_options_get(struct team *team, 2473 struct list_head *sel_opt_inst_list); 2474 2475 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info) 2476 { 2477 struct team *team; 2478 int err = 0; 2479 int i; 2480 struct nlattr *nl_option; 2481 2482 rtnl_lock(); 2483 2484 team = team_nl_team_get(info); 2485 if (!team) { 2486 err = -EINVAL; 2487 goto rtnl_unlock; 2488 } 2489 2490 err = -EINVAL; 2491 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) { 2492 err = -EINVAL; 2493 goto team_put; 2494 } 2495 2496 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) { 2497 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1]; 2498 struct nlattr *attr; 2499 struct nlattr *attr_data; 2500 LIST_HEAD(opt_inst_list); 2501 enum team_option_type opt_type; 2502 int opt_port_ifindex = 0; /* != 0 for per-port options */ 2503 u32 opt_array_index = 0; 2504 bool opt_is_array = false; 2505 struct team_option_inst *opt_inst; 2506 char *opt_name; 2507 bool opt_found = false; 2508 2509 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) { 2510 err = -EINVAL; 2511 goto team_put; 2512 } 2513 err = nla_parse_nested_deprecated(opt_attrs, 2514 TEAM_ATTR_OPTION_MAX, 2515 nl_option, 2516 team_nl_option_policy, 2517 info->extack); 2518 if (err) 2519 goto team_put; 2520 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] || 2521 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) { 2522 err = -EINVAL; 2523 goto team_put; 2524 } 2525 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) { 2526 case NLA_U32: 2527 opt_type = TEAM_OPTION_TYPE_U32; 2528 break; 2529 case NLA_STRING: 2530 opt_type = TEAM_OPTION_TYPE_STRING; 2531 break; 2532 case NLA_BINARY: 2533 opt_type = TEAM_OPTION_TYPE_BINARY; 2534 break; 2535 case NLA_FLAG: 2536 opt_type = TEAM_OPTION_TYPE_BOOL; 2537 break; 2538 case NLA_S32: 2539 opt_type = TEAM_OPTION_TYPE_S32; 2540 break; 2541 default: 2542 goto team_put; 2543 } 2544 2545 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA]; 2546 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) { 2547 err = -EINVAL; 2548 goto team_put; 2549 } 2550 2551 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]); 2552 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX]; 2553 if (attr) 2554 opt_port_ifindex = nla_get_u32(attr); 2555 2556 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX]; 2557 if (attr) { 2558 opt_is_array = true; 2559 opt_array_index = nla_get_u32(attr); 2560 } 2561 2562 list_for_each_entry(opt_inst, &team->option_inst_list, list) { 2563 struct team_option *option = opt_inst->option; 2564 struct team_gsetter_ctx ctx; 2565 struct team_option_inst_info *opt_inst_info; 2566 int tmp_ifindex; 2567 2568 opt_inst_info = &opt_inst->info; 2569 tmp_ifindex = opt_inst_info->port ? 2570 opt_inst_info->port->dev->ifindex : 0; 2571 if (option->type != opt_type || 2572 strcmp(option->name, opt_name) || 2573 tmp_ifindex != opt_port_ifindex || 2574 (option->array_size && !opt_is_array) || 2575 opt_inst_info->array_index != opt_array_index) 2576 continue; 2577 opt_found = true; 2578 ctx.info = opt_inst_info; 2579 switch (opt_type) { 2580 case TEAM_OPTION_TYPE_U32: 2581 ctx.data.u32_val = nla_get_u32(attr_data); 2582 break; 2583 case TEAM_OPTION_TYPE_STRING: 2584 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) { 2585 err = -EINVAL; 2586 goto team_put; 2587 } 2588 ctx.data.str_val = nla_data(attr_data); 2589 break; 2590 case TEAM_OPTION_TYPE_BINARY: 2591 ctx.data.bin_val.len = nla_len(attr_data); 2592 ctx.data.bin_val.ptr = nla_data(attr_data); 2593 break; 2594 case TEAM_OPTION_TYPE_BOOL: 2595 ctx.data.bool_val = attr_data ? true : false; 2596 break; 2597 case TEAM_OPTION_TYPE_S32: 2598 ctx.data.s32_val = nla_get_s32(attr_data); 2599 break; 2600 default: 2601 BUG(); 2602 } 2603 err = team_option_set(team, opt_inst, &ctx); 2604 if (err) 2605 goto team_put; 2606 opt_inst->changed = true; 2607 list_add(&opt_inst->tmp_list, &opt_inst_list); 2608 } 2609 if (!opt_found) { 2610 err = -ENOENT; 2611 goto team_put; 2612 } 2613 2614 err = team_nl_send_event_options_get(team, &opt_inst_list); 2615 if (err) 2616 break; 2617 } 2618 2619 team_put: 2620 team_nl_team_put(team); 2621 rtnl_unlock: 2622 rtnl_unlock(); 2623 return err; 2624 } 2625 2626 static int team_nl_fill_one_port_get(struct sk_buff *skb, 2627 struct team_port *port) 2628 { 2629 struct nlattr *port_item; 2630 2631 port_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_PORT); 2632 if (!port_item) 2633 goto nest_cancel; 2634 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex)) 2635 goto nest_cancel; 2636 if (port->changed) { 2637 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED)) 2638 goto nest_cancel; 2639 port->changed = false; 2640 } 2641 if ((port->removed && 2642 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) || 2643 (port->state.linkup && 2644 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) || 2645 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) || 2646 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex)) 2647 goto nest_cancel; 2648 nla_nest_end(skb, port_item); 2649 return 0; 2650 2651 nest_cancel: 2652 nla_nest_cancel(skb, port_item); 2653 return -EMSGSIZE; 2654 } 2655 2656 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq, 2657 int flags, team_nl_send_func_t *send_func, 2658 struct team_port *one_port) 2659 { 2660 struct nlattr *port_list; 2661 struct nlmsghdr *nlh; 2662 void *hdr; 2663 struct team_port *port; 2664 int err; 2665 struct sk_buff *skb = NULL; 2666 bool incomplete; 2667 int i; 2668 2669 port = list_first_entry_or_null(&team->port_list, 2670 struct team_port, list); 2671 2672 start_again: 2673 err = __send_and_alloc_skb(&skb, team, portid, send_func); 2674 if (err) 2675 return err; 2676 2677 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI, 2678 TEAM_CMD_PORT_LIST_GET); 2679 if (!hdr) { 2680 nlmsg_free(skb); 2681 return -EMSGSIZE; 2682 } 2683 2684 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex)) 2685 goto nla_put_failure; 2686 port_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_PORT); 2687 if (!port_list) 2688 goto nla_put_failure; 2689 2690 i = 0; 2691 incomplete = false; 2692 2693 /* If one port is selected, called wants to send port list containing 2694 * only this port. Otherwise go through all listed ports and send all 2695 */ 2696 if (one_port) { 2697 err = team_nl_fill_one_port_get(skb, one_port); 2698 if (err) 2699 goto errout; 2700 } else if (port) { 2701 list_for_each_entry_from(port, &team->port_list, list) { 2702 err = team_nl_fill_one_port_get(skb, port); 2703 if (err) { 2704 if (err == -EMSGSIZE) { 2705 if (!i) 2706 goto errout; 2707 incomplete = true; 2708 break; 2709 } 2710 goto errout; 2711 } 2712 i++; 2713 } 2714 } 2715 2716 nla_nest_end(skb, port_list); 2717 genlmsg_end(skb, hdr); 2718 if (incomplete) 2719 goto start_again; 2720 2721 send_done: 2722 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI); 2723 if (!nlh) { 2724 err = __send_and_alloc_skb(&skb, team, portid, send_func); 2725 if (err) 2726 return err; 2727 goto send_done; 2728 } 2729 2730 return send_func(skb, team, portid); 2731 2732 nla_put_failure: 2733 err = -EMSGSIZE; 2734 errout: 2735 nlmsg_free(skb); 2736 return err; 2737 } 2738 2739 static int team_nl_cmd_port_list_get(struct sk_buff *skb, 2740 struct genl_info *info) 2741 { 2742 struct team *team; 2743 int err; 2744 2745 team = team_nl_team_get(info); 2746 if (!team) 2747 return -EINVAL; 2748 2749 err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq, 2750 NLM_F_ACK, team_nl_send_unicast, NULL); 2751 2752 team_nl_team_put(team); 2753 2754 return err; 2755 } 2756 2757 static const struct genl_ops team_nl_ops[] = { 2758 { 2759 .cmd = TEAM_CMD_NOOP, 2760 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 2761 .doit = team_nl_cmd_noop, 2762 }, 2763 { 2764 .cmd = TEAM_CMD_OPTIONS_SET, 2765 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 2766 .doit = team_nl_cmd_options_set, 2767 .flags = GENL_ADMIN_PERM, 2768 }, 2769 { 2770 .cmd = TEAM_CMD_OPTIONS_GET, 2771 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 2772 .doit = team_nl_cmd_options_get, 2773 .flags = GENL_ADMIN_PERM, 2774 }, 2775 { 2776 .cmd = TEAM_CMD_PORT_LIST_GET, 2777 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 2778 .doit = team_nl_cmd_port_list_get, 2779 .flags = GENL_ADMIN_PERM, 2780 }, 2781 }; 2782 2783 static const struct genl_multicast_group team_nl_mcgrps[] = { 2784 { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, }, 2785 }; 2786 2787 static struct genl_family team_nl_family __ro_after_init = { 2788 .name = TEAM_GENL_NAME, 2789 .version = TEAM_GENL_VERSION, 2790 .maxattr = TEAM_ATTR_MAX, 2791 .policy = team_nl_policy, 2792 .netnsok = true, 2793 .module = THIS_MODULE, 2794 .ops = team_nl_ops, 2795 .n_ops = ARRAY_SIZE(team_nl_ops), 2796 .mcgrps = team_nl_mcgrps, 2797 .n_mcgrps = ARRAY_SIZE(team_nl_mcgrps), 2798 }; 2799 2800 static int team_nl_send_multicast(struct sk_buff *skb, 2801 struct team *team, u32 portid) 2802 { 2803 return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev), 2804 skb, 0, 0, GFP_KERNEL); 2805 } 2806 2807 static int team_nl_send_event_options_get(struct team *team, 2808 struct list_head *sel_opt_inst_list) 2809 { 2810 return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast, 2811 sel_opt_inst_list); 2812 } 2813 2814 static int team_nl_send_event_port_get(struct team *team, 2815 struct team_port *port) 2816 { 2817 return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast, 2818 port); 2819 } 2820 2821 static int __init team_nl_init(void) 2822 { 2823 return genl_register_family(&team_nl_family); 2824 } 2825 2826 static void team_nl_fini(void) 2827 { 2828 genl_unregister_family(&team_nl_family); 2829 } 2830 2831 2832 /****************** 2833 * Change checkers 2834 ******************/ 2835 2836 static void __team_options_change_check(struct team *team) 2837 { 2838 int err; 2839 struct team_option_inst *opt_inst; 2840 LIST_HEAD(sel_opt_inst_list); 2841 2842 list_for_each_entry(opt_inst, &team->option_inst_list, list) { 2843 if (opt_inst->changed) 2844 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list); 2845 } 2846 err = team_nl_send_event_options_get(team, &sel_opt_inst_list); 2847 if (err && err != -ESRCH) 2848 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n", 2849 err); 2850 } 2851 2852 /* rtnl lock is held */ 2853 2854 static void __team_port_change_send(struct team_port *port, bool linkup) 2855 { 2856 int err; 2857 2858 port->changed = true; 2859 port->state.linkup = linkup; 2860 team_refresh_port_linkup(port); 2861 if (linkup) { 2862 struct ethtool_link_ksettings ecmd; 2863 2864 err = __ethtool_get_link_ksettings(port->dev, &ecmd); 2865 if (!err) { 2866 port->state.speed = ecmd.base.speed; 2867 port->state.duplex = ecmd.base.duplex; 2868 goto send_event; 2869 } 2870 } 2871 port->state.speed = 0; 2872 port->state.duplex = 0; 2873 2874 send_event: 2875 err = team_nl_send_event_port_get(port->team, port); 2876 if (err && err != -ESRCH) 2877 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n", 2878 port->dev->name, err); 2879 2880 } 2881 2882 static void __team_carrier_check(struct team *team) 2883 { 2884 struct team_port *port; 2885 bool team_linkup; 2886 2887 if (team->user_carrier_enabled) 2888 return; 2889 2890 team_linkup = false; 2891 list_for_each_entry(port, &team->port_list, list) { 2892 if (port->linkup) { 2893 team_linkup = true; 2894 break; 2895 } 2896 } 2897 2898 if (team_linkup) 2899 netif_carrier_on(team->dev); 2900 else 2901 netif_carrier_off(team->dev); 2902 } 2903 2904 static void __team_port_change_check(struct team_port *port, bool linkup) 2905 { 2906 if (port->state.linkup != linkup) 2907 __team_port_change_send(port, linkup); 2908 __team_carrier_check(port->team); 2909 } 2910 2911 static void __team_port_change_port_added(struct team_port *port, bool linkup) 2912 { 2913 __team_port_change_send(port, linkup); 2914 __team_carrier_check(port->team); 2915 } 2916 2917 static void __team_port_change_port_removed(struct team_port *port) 2918 { 2919 port->removed = true; 2920 __team_port_change_send(port, false); 2921 __team_carrier_check(port->team); 2922 } 2923 2924 static void team_port_change_check(struct team_port *port, bool linkup) 2925 { 2926 struct team *team = port->team; 2927 2928 mutex_lock(&team->lock); 2929 __team_port_change_check(port, linkup); 2930 mutex_unlock(&team->lock); 2931 } 2932 2933 2934 /************************************ 2935 * Net device notifier event handler 2936 ************************************/ 2937 2938 static int team_device_event(struct notifier_block *unused, 2939 unsigned long event, void *ptr) 2940 { 2941 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 2942 struct team_port *port; 2943 2944 port = team_port_get_rtnl(dev); 2945 if (!port) 2946 return NOTIFY_DONE; 2947 2948 switch (event) { 2949 case NETDEV_UP: 2950 if (netif_oper_up(dev)) 2951 team_port_change_check(port, true); 2952 break; 2953 case NETDEV_DOWN: 2954 team_port_change_check(port, false); 2955 break; 2956 case NETDEV_CHANGE: 2957 if (netif_running(port->dev)) 2958 team_port_change_check(port, 2959 !!netif_oper_up(port->dev)); 2960 break; 2961 case NETDEV_UNREGISTER: 2962 team_del_slave(port->team->dev, dev); 2963 break; 2964 case NETDEV_FEAT_CHANGE: 2965 team_compute_features(port->team); 2966 break; 2967 case NETDEV_PRECHANGEMTU: 2968 /* Forbid to change mtu of underlaying device */ 2969 if (!port->team->port_mtu_change_allowed) 2970 return NOTIFY_BAD; 2971 break; 2972 case NETDEV_PRE_TYPE_CHANGE: 2973 /* Forbid to change type of underlaying device */ 2974 return NOTIFY_BAD; 2975 case NETDEV_RESEND_IGMP: 2976 /* Propagate to master device */ 2977 call_netdevice_notifiers(event, port->team->dev); 2978 break; 2979 } 2980 return NOTIFY_DONE; 2981 } 2982 2983 static struct notifier_block team_notifier_block __read_mostly = { 2984 .notifier_call = team_device_event, 2985 }; 2986 2987 2988 /*********************** 2989 * Module init and exit 2990 ***********************/ 2991 2992 static int __init team_module_init(void) 2993 { 2994 int err; 2995 2996 register_netdevice_notifier(&team_notifier_block); 2997 2998 err = rtnl_link_register(&team_link_ops); 2999 if (err) 3000 goto err_rtnl_reg; 3001 3002 err = team_nl_init(); 3003 if (err) 3004 goto err_nl_init; 3005 3006 return 0; 3007 3008 err_nl_init: 3009 rtnl_link_unregister(&team_link_ops); 3010 3011 err_rtnl_reg: 3012 unregister_netdevice_notifier(&team_notifier_block); 3013 3014 return err; 3015 } 3016 3017 static void __exit team_module_exit(void) 3018 { 3019 team_nl_fini(); 3020 rtnl_link_unregister(&team_link_ops); 3021 unregister_netdevice_notifier(&team_notifier_block); 3022 } 3023 3024 module_init(team_module_init); 3025 module_exit(team_module_exit); 3026 3027 MODULE_LICENSE("GPL v2"); 3028 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>"); 3029 MODULE_DESCRIPTION("Ethernet team device driver"); 3030 MODULE_ALIAS_RTNL_LINK(DRV_NAME); 3031