1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * drivers/net/team/team.c - Network team device driver 4 * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com> 5 */ 6 7 #include <linux/ethtool.h> 8 #include <linux/kernel.h> 9 #include <linux/types.h> 10 #include <linux/module.h> 11 #include <linux/init.h> 12 #include <linux/slab.h> 13 #include <linux/rcupdate.h> 14 #include <linux/errno.h> 15 #include <linux/ctype.h> 16 #include <linux/notifier.h> 17 #include <linux/netdevice.h> 18 #include <linux/netpoll.h> 19 #include <linux/if_vlan.h> 20 #include <linux/if_arp.h> 21 #include <linux/socket.h> 22 #include <linux/etherdevice.h> 23 #include <linux/rtnetlink.h> 24 #include <net/rtnetlink.h> 25 #include <net/genetlink.h> 26 #include <net/netlink.h> 27 #include <net/sch_generic.h> 28 #include <linux/if_team.h> 29 30 #include "team_nl.h" 31 32 #define DRV_NAME "team" 33 34 35 /********** 36 * Helpers 37 **********/ 38 39 static struct team_port *team_port_get_rtnl(const struct net_device *dev) 40 { 41 struct team_port *port = rtnl_dereference(dev->rx_handler_data); 42 43 return netif_is_team_port(dev) ? port : NULL; 44 } 45 46 /* 47 * Since the ability to change device address for open port device is tested in 48 * team_port_add, this function can be called without control of return value 49 */ 50 static int __set_port_dev_addr(struct net_device *port_dev, 51 const unsigned char *dev_addr) 52 { 53 struct sockaddr_storage addr; 54 55 memcpy(addr.__data, dev_addr, port_dev->addr_len); 56 addr.ss_family = port_dev->type; 57 return dev_set_mac_address(port_dev, (struct sockaddr *)&addr, NULL); 58 } 59 60 static int team_port_set_orig_dev_addr(struct team_port *port) 61 { 62 return __set_port_dev_addr(port->dev, port->orig.dev_addr); 63 } 64 65 static int team_port_set_team_dev_addr(struct team *team, 66 struct team_port *port) 67 { 68 return __set_port_dev_addr(port->dev, team->dev->dev_addr); 69 } 70 71 int team_modeop_port_enter(struct team *team, struct team_port *port) 72 { 73 return team_port_set_team_dev_addr(team, port); 74 } 75 EXPORT_SYMBOL(team_modeop_port_enter); 76 77 void team_modeop_port_change_dev_addr(struct team *team, 78 struct team_port *port) 79 { 80 team_port_set_team_dev_addr(team, port); 81 } 82 EXPORT_SYMBOL(team_modeop_port_change_dev_addr); 83 84 static void team_lower_state_changed(struct team_port *port) 85 { 86 struct netdev_lag_lower_state_info info; 87 88 info.link_up = port->linkup; 89 info.tx_enabled = team_port_enabled(port); 90 netdev_lower_state_changed(port->dev, &info); 91 } 92 93 static void team_refresh_port_linkup(struct team_port *port) 94 { 95 bool new_linkup = port->user.linkup_enabled ? port->user.linkup : 96 port->state.linkup; 97 98 if (port->linkup != new_linkup) { 99 port->linkup = new_linkup; 100 team_lower_state_changed(port); 101 } 102 } 103 104 105 /******************* 106 * Options handling 107 *******************/ 108 109 struct team_option_inst { /* One for each option instance */ 110 struct list_head list; 111 struct list_head tmp_list; 112 struct team_option *option; 113 struct team_option_inst_info info; 114 bool changed; 115 bool removed; 116 }; 117 118 static struct team_option *__team_find_option(struct team *team, 119 const char *opt_name) 120 { 121 struct team_option *option; 122 123 list_for_each_entry(option, &team->option_list, list) { 124 if (strcmp(option->name, opt_name) == 0) 125 return option; 126 } 127 return NULL; 128 } 129 130 static void __team_option_inst_del(struct team_option_inst *opt_inst) 131 { 132 list_del(&opt_inst->list); 133 kfree(opt_inst); 134 } 135 136 static void __team_option_inst_del_option(struct team *team, 137 struct team_option *option) 138 { 139 struct team_option_inst *opt_inst, *tmp; 140 141 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) { 142 if (opt_inst->option == option) 143 __team_option_inst_del(opt_inst); 144 } 145 } 146 147 static int __team_option_inst_add(struct team *team, struct team_option *option, 148 struct team_port *port) 149 { 150 struct team_option_inst *opt_inst; 151 unsigned int array_size; 152 unsigned int i; 153 154 array_size = option->array_size; 155 if (!array_size) 156 array_size = 1; /* No array but still need one instance */ 157 158 for (i = 0; i < array_size; i++) { 159 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL); 160 if (!opt_inst) 161 return -ENOMEM; 162 opt_inst->option = option; 163 opt_inst->info.port = port; 164 opt_inst->info.array_index = i; 165 opt_inst->changed = true; 166 opt_inst->removed = false; 167 list_add_tail(&opt_inst->list, &team->option_inst_list); 168 if (option->init) 169 option->init(team, &opt_inst->info); 170 171 } 172 return 0; 173 } 174 175 static int __team_option_inst_add_option(struct team *team, 176 struct team_option *option) 177 { 178 int err; 179 180 if (!option->per_port) { 181 err = __team_option_inst_add(team, option, NULL); 182 if (err) 183 goto inst_del_option; 184 } 185 return 0; 186 187 inst_del_option: 188 __team_option_inst_del_option(team, option); 189 return err; 190 } 191 192 static void __team_option_inst_mark_removed_option(struct team *team, 193 struct team_option *option) 194 { 195 struct team_option_inst *opt_inst; 196 197 list_for_each_entry(opt_inst, &team->option_inst_list, list) { 198 if (opt_inst->option == option) { 199 opt_inst->changed = true; 200 opt_inst->removed = true; 201 } 202 } 203 } 204 205 static void __team_option_inst_del_port(struct team *team, 206 struct team_port *port) 207 { 208 struct team_option_inst *opt_inst, *tmp; 209 210 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) { 211 if (opt_inst->option->per_port && 212 opt_inst->info.port == port) 213 __team_option_inst_del(opt_inst); 214 } 215 } 216 217 static int __team_option_inst_add_port(struct team *team, 218 struct team_port *port) 219 { 220 struct team_option *option; 221 int err; 222 223 list_for_each_entry(option, &team->option_list, list) { 224 if (!option->per_port) 225 continue; 226 err = __team_option_inst_add(team, option, port); 227 if (err) 228 goto inst_del_port; 229 } 230 return 0; 231 232 inst_del_port: 233 __team_option_inst_del_port(team, port); 234 return err; 235 } 236 237 static void __team_option_inst_mark_removed_port(struct team *team, 238 struct team_port *port) 239 { 240 struct team_option_inst *opt_inst; 241 242 list_for_each_entry(opt_inst, &team->option_inst_list, list) { 243 if (opt_inst->info.port == port) { 244 opt_inst->changed = true; 245 opt_inst->removed = true; 246 } 247 } 248 } 249 250 static int __team_options_register(struct team *team, 251 const struct team_option *option, 252 size_t option_count) 253 { 254 int i; 255 struct team_option **dst_opts; 256 int err; 257 258 dst_opts = kcalloc(option_count, sizeof(struct team_option *), 259 GFP_KERNEL); 260 if (!dst_opts) 261 return -ENOMEM; 262 for (i = 0; i < option_count; i++, option++) { 263 if (__team_find_option(team, option->name)) { 264 err = -EEXIST; 265 goto alloc_rollback; 266 } 267 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL); 268 if (!dst_opts[i]) { 269 err = -ENOMEM; 270 goto alloc_rollback; 271 } 272 } 273 274 for (i = 0; i < option_count; i++) { 275 err = __team_option_inst_add_option(team, dst_opts[i]); 276 if (err) 277 goto inst_rollback; 278 list_add_tail(&dst_opts[i]->list, &team->option_list); 279 } 280 281 kfree(dst_opts); 282 return 0; 283 284 inst_rollback: 285 for (i--; i >= 0; i--) { 286 __team_option_inst_del_option(team, dst_opts[i]); 287 list_del(&dst_opts[i]->list); 288 } 289 290 i = option_count; 291 alloc_rollback: 292 for (i--; i >= 0; i--) 293 kfree(dst_opts[i]); 294 295 kfree(dst_opts); 296 return err; 297 } 298 299 static void __team_options_mark_removed(struct team *team, 300 const struct team_option *option, 301 size_t option_count) 302 { 303 int i; 304 305 for (i = 0; i < option_count; i++, option++) { 306 struct team_option *del_opt; 307 308 del_opt = __team_find_option(team, option->name); 309 if (del_opt) 310 __team_option_inst_mark_removed_option(team, del_opt); 311 } 312 } 313 314 static void __team_options_unregister(struct team *team, 315 const struct team_option *option, 316 size_t option_count) 317 { 318 int i; 319 320 for (i = 0; i < option_count; i++, option++) { 321 struct team_option *del_opt; 322 323 del_opt = __team_find_option(team, option->name); 324 if (del_opt) { 325 __team_option_inst_del_option(team, del_opt); 326 list_del(&del_opt->list); 327 kfree(del_opt); 328 } 329 } 330 } 331 332 static void __team_options_change_check(struct team *team); 333 334 int team_options_register(struct team *team, 335 const struct team_option *option, 336 size_t option_count) 337 { 338 int err; 339 340 err = __team_options_register(team, option, option_count); 341 if (err) 342 return err; 343 __team_options_change_check(team); 344 return 0; 345 } 346 EXPORT_SYMBOL(team_options_register); 347 348 void team_options_unregister(struct team *team, 349 const struct team_option *option, 350 size_t option_count) 351 { 352 __team_options_mark_removed(team, option, option_count); 353 __team_options_change_check(team); 354 __team_options_unregister(team, option, option_count); 355 } 356 EXPORT_SYMBOL(team_options_unregister); 357 358 static int team_option_get(struct team *team, 359 struct team_option_inst *opt_inst, 360 struct team_gsetter_ctx *ctx) 361 { 362 if (!opt_inst->option->getter) 363 return -EOPNOTSUPP; 364 365 opt_inst->option->getter(team, ctx); 366 return 0; 367 } 368 369 static int team_option_set(struct team *team, 370 struct team_option_inst *opt_inst, 371 struct team_gsetter_ctx *ctx) 372 { 373 if (!opt_inst->option->setter) 374 return -EOPNOTSUPP; 375 return opt_inst->option->setter(team, ctx); 376 } 377 378 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info) 379 { 380 struct team_option_inst *opt_inst; 381 382 opt_inst = container_of(opt_inst_info, struct team_option_inst, info); 383 opt_inst->changed = true; 384 } 385 EXPORT_SYMBOL(team_option_inst_set_change); 386 387 void team_options_change_check(struct team *team) 388 { 389 __team_options_change_check(team); 390 } 391 EXPORT_SYMBOL(team_options_change_check); 392 393 394 /**************** 395 * Mode handling 396 ****************/ 397 398 static LIST_HEAD(mode_list); 399 static DEFINE_SPINLOCK(mode_list_lock); 400 401 struct team_mode_item { 402 struct list_head list; 403 const struct team_mode *mode; 404 }; 405 406 static struct team_mode_item *__find_mode(const char *kind) 407 { 408 struct team_mode_item *mitem; 409 410 list_for_each_entry(mitem, &mode_list, list) { 411 if (strcmp(mitem->mode->kind, kind) == 0) 412 return mitem; 413 } 414 return NULL; 415 } 416 417 static bool is_good_mode_name(const char *name) 418 { 419 while (*name != '\0') { 420 if (!isalpha(*name) && !isdigit(*name) && *name != '_') 421 return false; 422 name++; 423 } 424 return true; 425 } 426 427 int team_mode_register(const struct team_mode *mode) 428 { 429 int err = 0; 430 struct team_mode_item *mitem; 431 432 if (!is_good_mode_name(mode->kind) || 433 mode->priv_size > TEAM_MODE_PRIV_SIZE) 434 return -EINVAL; 435 436 mitem = kmalloc(sizeof(*mitem), GFP_KERNEL); 437 if (!mitem) 438 return -ENOMEM; 439 440 spin_lock(&mode_list_lock); 441 if (__find_mode(mode->kind)) { 442 err = -EEXIST; 443 kfree(mitem); 444 goto unlock; 445 } 446 mitem->mode = mode; 447 list_add_tail(&mitem->list, &mode_list); 448 unlock: 449 spin_unlock(&mode_list_lock); 450 return err; 451 } 452 EXPORT_SYMBOL(team_mode_register); 453 454 void team_mode_unregister(const struct team_mode *mode) 455 { 456 struct team_mode_item *mitem; 457 458 spin_lock(&mode_list_lock); 459 mitem = __find_mode(mode->kind); 460 if (mitem) { 461 list_del_init(&mitem->list); 462 kfree(mitem); 463 } 464 spin_unlock(&mode_list_lock); 465 } 466 EXPORT_SYMBOL(team_mode_unregister); 467 468 static const struct team_mode *team_mode_get(const char *kind) 469 { 470 struct team_mode_item *mitem; 471 const struct team_mode *mode = NULL; 472 473 if (!try_module_get(THIS_MODULE)) 474 return NULL; 475 476 spin_lock(&mode_list_lock); 477 mitem = __find_mode(kind); 478 if (!mitem) { 479 spin_unlock(&mode_list_lock); 480 request_module("team-mode-%s", kind); 481 spin_lock(&mode_list_lock); 482 mitem = __find_mode(kind); 483 } 484 if (mitem) { 485 mode = mitem->mode; 486 if (!try_module_get(mode->owner)) 487 mode = NULL; 488 } 489 490 spin_unlock(&mode_list_lock); 491 module_put(THIS_MODULE); 492 return mode; 493 } 494 495 static void team_mode_put(const struct team_mode *mode) 496 { 497 module_put(mode->owner); 498 } 499 500 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb) 501 { 502 dev_kfree_skb_any(skb); 503 return false; 504 } 505 506 static rx_handler_result_t team_dummy_receive(struct team *team, 507 struct team_port *port, 508 struct sk_buff *skb) 509 { 510 return RX_HANDLER_ANOTHER; 511 } 512 513 static const struct team_mode __team_no_mode = { 514 .kind = "*NOMODE*", 515 }; 516 517 static bool team_is_mode_set(struct team *team) 518 { 519 return team->mode != &__team_no_mode; 520 } 521 522 static void team_set_no_mode(struct team *team) 523 { 524 team->user_carrier_enabled = false; 525 team->mode = &__team_no_mode; 526 } 527 528 static void team_adjust_ops(struct team *team) 529 { 530 /* 531 * To avoid checks in rx/tx skb paths, ensure here that non-null and 532 * correct ops are always set. 533 */ 534 535 if (!team->en_port_count || !team_is_mode_set(team) || 536 !team->mode->ops->transmit) 537 team->ops.transmit = team_dummy_transmit; 538 else 539 team->ops.transmit = team->mode->ops->transmit; 540 541 if (!team->en_port_count || !team_is_mode_set(team) || 542 !team->mode->ops->receive) 543 team->ops.receive = team_dummy_receive; 544 else 545 team->ops.receive = team->mode->ops->receive; 546 } 547 548 /* 549 * We can benefit from the fact that it's ensured no port is present 550 * at the time of mode change. Therefore no packets are in fly so there's no 551 * need to set mode operations in any special way. 552 */ 553 static int __team_change_mode(struct team *team, 554 const struct team_mode *new_mode) 555 { 556 /* Check if mode was previously set and do cleanup if so */ 557 if (team_is_mode_set(team)) { 558 void (*exit_op)(struct team *team) = team->ops.exit; 559 560 /* Clear ops area so no callback is called any longer */ 561 memset(&team->ops, 0, sizeof(struct team_mode_ops)); 562 team_adjust_ops(team); 563 564 if (exit_op) 565 exit_op(team); 566 team_mode_put(team->mode); 567 team_set_no_mode(team); 568 /* zero private data area */ 569 memset(&team->mode_priv, 0, 570 sizeof(struct team) - offsetof(struct team, mode_priv)); 571 } 572 573 if (!new_mode) 574 return 0; 575 576 if (new_mode->ops->init) { 577 int err; 578 579 err = new_mode->ops->init(team); 580 if (err) 581 return err; 582 } 583 584 team->mode = new_mode; 585 memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops)); 586 team_adjust_ops(team); 587 588 return 0; 589 } 590 591 static int team_change_mode(struct team *team, const char *kind) 592 { 593 const struct team_mode *new_mode; 594 struct net_device *dev = team->dev; 595 int err; 596 597 if (!list_empty(&team->port_list)) { 598 netdev_err(dev, "No ports can be present during mode change\n"); 599 return -EBUSY; 600 } 601 602 if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) { 603 netdev_err(dev, "Unable to change to the same mode the team is in\n"); 604 return -EINVAL; 605 } 606 607 new_mode = team_mode_get(kind); 608 if (!new_mode) { 609 netdev_err(dev, "Mode \"%s\" not found\n", kind); 610 return -EINVAL; 611 } 612 613 err = __team_change_mode(team, new_mode); 614 if (err) { 615 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind); 616 team_mode_put(new_mode); 617 return err; 618 } 619 620 netdev_info(dev, "Mode changed to \"%s\"\n", kind); 621 return 0; 622 } 623 624 625 /********************* 626 * Peers notification 627 *********************/ 628 629 static void team_notify_peers_work(struct work_struct *work) 630 { 631 struct team *team; 632 int val; 633 634 team = container_of(work, struct team, notify_peers.dw.work); 635 636 if (!rtnl_trylock()) { 637 schedule_delayed_work(&team->notify_peers.dw, 0); 638 return; 639 } 640 val = atomic_dec_if_positive(&team->notify_peers.count_pending); 641 if (val < 0) { 642 rtnl_unlock(); 643 return; 644 } 645 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev); 646 rtnl_unlock(); 647 if (val) 648 schedule_delayed_work(&team->notify_peers.dw, 649 msecs_to_jiffies(team->notify_peers.interval)); 650 } 651 652 static void team_notify_peers(struct team *team) 653 { 654 if (!team->notify_peers.count || !netif_running(team->dev)) 655 return; 656 atomic_add(team->notify_peers.count, &team->notify_peers.count_pending); 657 schedule_delayed_work(&team->notify_peers.dw, 0); 658 } 659 660 static void team_notify_peers_init(struct team *team) 661 { 662 INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work); 663 } 664 665 static void team_notify_peers_fini(struct team *team) 666 { 667 cancel_delayed_work_sync(&team->notify_peers.dw); 668 } 669 670 671 /******************************* 672 * Send multicast group rejoins 673 *******************************/ 674 675 static void team_mcast_rejoin_work(struct work_struct *work) 676 { 677 struct team *team; 678 int val; 679 680 team = container_of(work, struct team, mcast_rejoin.dw.work); 681 682 if (!rtnl_trylock()) { 683 schedule_delayed_work(&team->mcast_rejoin.dw, 0); 684 return; 685 } 686 val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending); 687 if (val < 0) { 688 rtnl_unlock(); 689 return; 690 } 691 call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev); 692 rtnl_unlock(); 693 if (val) 694 schedule_delayed_work(&team->mcast_rejoin.dw, 695 msecs_to_jiffies(team->mcast_rejoin.interval)); 696 } 697 698 static void team_mcast_rejoin(struct team *team) 699 { 700 if (!team->mcast_rejoin.count || !netif_running(team->dev)) 701 return; 702 atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending); 703 schedule_delayed_work(&team->mcast_rejoin.dw, 0); 704 } 705 706 static void team_mcast_rejoin_init(struct team *team) 707 { 708 INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work); 709 } 710 711 static void team_mcast_rejoin_fini(struct team *team) 712 { 713 cancel_delayed_work_sync(&team->mcast_rejoin.dw); 714 } 715 716 717 /************************ 718 * Rx path frame handler 719 ************************/ 720 721 /* note: already called with rcu_read_lock */ 722 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb) 723 { 724 struct sk_buff *skb = *pskb; 725 struct team_port *port; 726 struct team *team; 727 rx_handler_result_t res; 728 729 skb = skb_share_check(skb, GFP_ATOMIC); 730 if (!skb) 731 return RX_HANDLER_CONSUMED; 732 733 *pskb = skb; 734 735 port = team_port_get_rcu(skb->dev); 736 team = port->team; 737 if (!team_port_enabled(port)) { 738 if (is_link_local_ether_addr(eth_hdr(skb)->h_dest)) 739 /* link-local packets are mostly useful when stack receives them 740 * with the link they arrive on. 741 */ 742 return RX_HANDLER_PASS; 743 /* allow exact match delivery for disabled ports */ 744 res = RX_HANDLER_EXACT; 745 } else { 746 res = team->ops.receive(team, port, skb); 747 } 748 if (res == RX_HANDLER_ANOTHER) { 749 struct team_pcpu_stats *pcpu_stats; 750 751 pcpu_stats = this_cpu_ptr(team->pcpu_stats); 752 u64_stats_update_begin(&pcpu_stats->syncp); 753 u64_stats_inc(&pcpu_stats->rx_packets); 754 u64_stats_add(&pcpu_stats->rx_bytes, skb->len); 755 if (skb->pkt_type == PACKET_MULTICAST) 756 u64_stats_inc(&pcpu_stats->rx_multicast); 757 u64_stats_update_end(&pcpu_stats->syncp); 758 759 skb->dev = team->dev; 760 } else if (res == RX_HANDLER_EXACT) { 761 this_cpu_inc(team->pcpu_stats->rx_nohandler); 762 } else { 763 this_cpu_inc(team->pcpu_stats->rx_dropped); 764 } 765 766 return res; 767 } 768 769 770 /************************************* 771 * Multiqueue Tx port select override 772 *************************************/ 773 774 static int team_queue_override_init(struct team *team) 775 { 776 struct list_head *listarr; 777 unsigned int queue_cnt = team->dev->num_tx_queues - 1; 778 unsigned int i; 779 780 if (!queue_cnt) 781 return 0; 782 listarr = kmalloc_array(queue_cnt, sizeof(struct list_head), 783 GFP_KERNEL); 784 if (!listarr) 785 return -ENOMEM; 786 team->qom_lists = listarr; 787 for (i = 0; i < queue_cnt; i++) 788 INIT_LIST_HEAD(listarr++); 789 return 0; 790 } 791 792 static void team_queue_override_fini(struct team *team) 793 { 794 kfree(team->qom_lists); 795 } 796 797 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id) 798 { 799 return &team->qom_lists[queue_id - 1]; 800 } 801 802 /* 803 * note: already called with rcu_read_lock 804 */ 805 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb) 806 { 807 struct list_head *qom_list; 808 struct team_port *port; 809 810 if (!team->queue_override_enabled || !skb->queue_mapping) 811 return false; 812 qom_list = __team_get_qom_list(team, skb->queue_mapping); 813 list_for_each_entry_rcu(port, qom_list, qom_list) { 814 if (!team_dev_queue_xmit(team, port, skb)) 815 return true; 816 } 817 return false; 818 } 819 820 static void __team_queue_override_port_del(struct team *team, 821 struct team_port *port) 822 { 823 if (!port->queue_id) 824 return; 825 list_del_rcu(&port->qom_list); 826 } 827 828 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port, 829 struct team_port *cur) 830 { 831 if (port->priority < cur->priority) 832 return true; 833 if (port->priority > cur->priority) 834 return false; 835 if (port->index < cur->index) 836 return true; 837 return false; 838 } 839 840 static void __team_queue_override_port_add(struct team *team, 841 struct team_port *port) 842 { 843 struct team_port *cur; 844 struct list_head *qom_list; 845 struct list_head *node; 846 847 if (!port->queue_id) 848 return; 849 qom_list = __team_get_qom_list(team, port->queue_id); 850 node = qom_list; 851 list_for_each_entry(cur, qom_list, qom_list) { 852 if (team_queue_override_port_has_gt_prio_than(port, cur)) 853 break; 854 node = &cur->qom_list; 855 } 856 list_add_tail_rcu(&port->qom_list, node); 857 } 858 859 static void __team_queue_override_enabled_check(struct team *team) 860 { 861 struct team_port *port; 862 bool enabled = false; 863 864 list_for_each_entry(port, &team->port_list, list) { 865 if (port->queue_id) { 866 enabled = true; 867 break; 868 } 869 } 870 if (enabled == team->queue_override_enabled) 871 return; 872 netdev_dbg(team->dev, "%s queue override\n", 873 enabled ? "Enabling" : "Disabling"); 874 team->queue_override_enabled = enabled; 875 } 876 877 static void team_queue_override_port_prio_changed(struct team *team, 878 struct team_port *port) 879 { 880 if (!port->queue_id || team_port_enabled(port)) 881 return; 882 __team_queue_override_port_del(team, port); 883 __team_queue_override_port_add(team, port); 884 __team_queue_override_enabled_check(team); 885 } 886 887 static void team_queue_override_port_change_queue_id(struct team *team, 888 struct team_port *port, 889 u16 new_queue_id) 890 { 891 if (team_port_enabled(port)) { 892 __team_queue_override_port_del(team, port); 893 port->queue_id = new_queue_id; 894 __team_queue_override_port_add(team, port); 895 __team_queue_override_enabled_check(team); 896 } else { 897 port->queue_id = new_queue_id; 898 } 899 } 900 901 static void team_queue_override_port_add(struct team *team, 902 struct team_port *port) 903 { 904 __team_queue_override_port_add(team, port); 905 __team_queue_override_enabled_check(team); 906 } 907 908 static void team_queue_override_port_del(struct team *team, 909 struct team_port *port) 910 { 911 __team_queue_override_port_del(team, port); 912 __team_queue_override_enabled_check(team); 913 } 914 915 916 /**************** 917 * Port handling 918 ****************/ 919 920 static bool team_port_find(const struct team *team, 921 const struct team_port *port) 922 { 923 struct team_port *cur; 924 925 list_for_each_entry(cur, &team->port_list, list) 926 if (cur == port) 927 return true; 928 return false; 929 } 930 931 /* 932 * Enable/disable port by adding to enabled port hashlist and setting 933 * port->index (Might be racy so reader could see incorrect ifindex when 934 * processing a flying packet, but that is not a problem). Write guarded 935 * by team->lock. 936 */ 937 static void team_port_enable(struct team *team, 938 struct team_port *port) 939 { 940 if (team_port_enabled(port)) 941 return; 942 port->index = team->en_port_count++; 943 hlist_add_head_rcu(&port->hlist, 944 team_port_index_hash(team, port->index)); 945 team_adjust_ops(team); 946 team_queue_override_port_add(team, port); 947 if (team->ops.port_enabled) 948 team->ops.port_enabled(team, port); 949 team_notify_peers(team); 950 team_mcast_rejoin(team); 951 team_lower_state_changed(port); 952 } 953 954 static void __reconstruct_port_hlist(struct team *team, int rm_index) 955 { 956 int i; 957 struct team_port *port; 958 959 for (i = rm_index + 1; i < team->en_port_count; i++) { 960 port = team_get_port_by_index(team, i); 961 hlist_del_rcu(&port->hlist); 962 port->index--; 963 hlist_add_head_rcu(&port->hlist, 964 team_port_index_hash(team, port->index)); 965 } 966 } 967 968 static void team_port_disable(struct team *team, 969 struct team_port *port) 970 { 971 if (!team_port_enabled(port)) 972 return; 973 if (team->ops.port_disabled) 974 team->ops.port_disabled(team, port); 975 hlist_del_rcu(&port->hlist); 976 __reconstruct_port_hlist(team, port->index); 977 port->index = -1; 978 team->en_port_count--; 979 team_queue_override_port_del(team, port); 980 team_adjust_ops(team); 981 team_lower_state_changed(port); 982 } 983 984 #define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \ 985 NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE | \ 986 NETIF_F_HIGHDMA | NETIF_F_LRO | \ 987 NETIF_F_GSO_ENCAP_ALL) 988 989 #define TEAM_ENC_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \ 990 NETIF_F_RXCSUM | NETIF_F_GSO_SOFTWARE) 991 992 static void __team_compute_features(struct team *team) 993 { 994 struct team_port *port; 995 netdev_features_t vlan_features = TEAM_VLAN_FEATURES; 996 netdev_features_t enc_features = TEAM_ENC_FEATURES; 997 unsigned short max_hard_header_len = ETH_HLEN; 998 unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE | 999 IFF_XMIT_DST_RELEASE_PERM; 1000 1001 rcu_read_lock(); 1002 if (list_empty(&team->port_list)) 1003 goto done; 1004 1005 vlan_features = netdev_base_features(vlan_features); 1006 enc_features = netdev_base_features(enc_features); 1007 1008 list_for_each_entry_rcu(port, &team->port_list, list) { 1009 vlan_features = netdev_increment_features(vlan_features, 1010 port->dev->vlan_features, 1011 TEAM_VLAN_FEATURES); 1012 enc_features = 1013 netdev_increment_features(enc_features, 1014 port->dev->hw_enc_features, 1015 TEAM_ENC_FEATURES); 1016 1017 dst_release_flag &= port->dev->priv_flags; 1018 if (port->dev->hard_header_len > max_hard_header_len) 1019 max_hard_header_len = port->dev->hard_header_len; 1020 } 1021 done: 1022 rcu_read_unlock(); 1023 1024 team->dev->vlan_features = vlan_features; 1025 team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL | 1026 NETIF_F_HW_VLAN_CTAG_TX | 1027 NETIF_F_HW_VLAN_STAG_TX; 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 __team_compute_features(team); 1038 netdev_change_features(team->dev); 1039 } 1040 1041 static int team_port_enter(struct team *team, struct team_port *port) 1042 { 1043 int err = 0; 1044 1045 dev_hold(team->dev); 1046 if (team->ops.port_enter) { 1047 err = team->ops.port_enter(team, port); 1048 if (err) { 1049 netdev_err(team->dev, "Device %s failed to enter team mode\n", 1050 port->dev->name); 1051 goto err_port_enter; 1052 } 1053 } 1054 1055 return 0; 1056 1057 err_port_enter: 1058 dev_put(team->dev); 1059 1060 return err; 1061 } 1062 1063 static void team_port_leave(struct team *team, struct team_port *port) 1064 { 1065 if (team->ops.port_leave) 1066 team->ops.port_leave(team, port); 1067 dev_put(team->dev); 1068 } 1069 1070 #ifdef CONFIG_NET_POLL_CONTROLLER 1071 static int __team_port_enable_netpoll(struct team_port *port) 1072 { 1073 struct netpoll *np; 1074 int err; 1075 1076 np = kzalloc(sizeof(*np), GFP_KERNEL); 1077 if (!np) 1078 return -ENOMEM; 1079 1080 err = __netpoll_setup(np, port->dev); 1081 if (err) { 1082 kfree(np); 1083 return err; 1084 } 1085 port->np = np; 1086 return err; 1087 } 1088 1089 static int team_port_enable_netpoll(struct team_port *port) 1090 { 1091 if (!port->team->dev->npinfo) 1092 return 0; 1093 1094 return __team_port_enable_netpoll(port); 1095 } 1096 1097 static void team_port_disable_netpoll(struct team_port *port) 1098 { 1099 struct netpoll *np = port->np; 1100 1101 if (!np) 1102 return; 1103 port->np = NULL; 1104 1105 __netpoll_free(np); 1106 } 1107 #else 1108 static int team_port_enable_netpoll(struct team_port *port) 1109 { 1110 return 0; 1111 } 1112 static void team_port_disable_netpoll(struct team_port *port) 1113 { 1114 } 1115 #endif 1116 1117 static int team_upper_dev_link(struct team *team, struct team_port *port, 1118 struct netlink_ext_ack *extack) 1119 { 1120 struct netdev_lag_upper_info lag_upper_info; 1121 int err; 1122 1123 lag_upper_info.tx_type = team->mode->lag_tx_type; 1124 lag_upper_info.hash_type = NETDEV_LAG_HASH_UNKNOWN; 1125 err = netdev_master_upper_dev_link(port->dev, team->dev, NULL, 1126 &lag_upper_info, extack); 1127 if (err) 1128 return err; 1129 port->dev->priv_flags |= IFF_TEAM_PORT; 1130 return 0; 1131 } 1132 1133 static void team_upper_dev_unlink(struct team *team, struct team_port *port) 1134 { 1135 netdev_upper_dev_unlink(port->dev, team->dev); 1136 port->dev->priv_flags &= ~IFF_TEAM_PORT; 1137 } 1138 1139 static void __team_port_change_port_added(struct team_port *port, bool linkup); 1140 static int team_dev_type_check_change(struct net_device *dev, 1141 struct net_device *port_dev); 1142 1143 static int team_port_add(struct team *team, struct net_device *port_dev, 1144 struct netlink_ext_ack *extack) 1145 { 1146 struct net_device *dev = team->dev; 1147 struct team_port *port; 1148 char *portname = port_dev->name; 1149 int err; 1150 1151 if (port_dev->flags & IFF_LOOPBACK) { 1152 NL_SET_ERR_MSG(extack, "Loopback device can't be added as a team port"); 1153 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n", 1154 portname); 1155 return -EINVAL; 1156 } 1157 1158 if (netif_is_team_port(port_dev)) { 1159 NL_SET_ERR_MSG(extack, "Device is already a port of a team device"); 1160 netdev_err(dev, "Device %s is already a port " 1161 "of a team device\n", portname); 1162 return -EBUSY; 1163 } 1164 1165 if (dev == port_dev) { 1166 NL_SET_ERR_MSG(extack, "Cannot enslave team device to itself"); 1167 netdev_err(dev, "Cannot enslave team device to itself\n"); 1168 return -EINVAL; 1169 } 1170 1171 if (netdev_has_upper_dev(dev, port_dev)) { 1172 NL_SET_ERR_MSG(extack, "Device is already an upper device of the team interface"); 1173 netdev_err(dev, "Device %s is already an upper device of the team interface\n", 1174 portname); 1175 return -EBUSY; 1176 } 1177 1178 if (port_dev->features & NETIF_F_VLAN_CHALLENGED && 1179 vlan_uses_dev(dev)) { 1180 NL_SET_ERR_MSG(extack, "Device is VLAN challenged and team device has VLAN set up"); 1181 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n", 1182 portname); 1183 return -EPERM; 1184 } 1185 1186 err = team_dev_type_check_change(dev, port_dev); 1187 if (err) 1188 return err; 1189 1190 if (port_dev->flags & IFF_UP) { 1191 NL_SET_ERR_MSG(extack, "Device is up. Set it down before adding it as a team port"); 1192 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n", 1193 portname); 1194 return -EBUSY; 1195 } 1196 1197 port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size, 1198 GFP_KERNEL); 1199 if (!port) 1200 return -ENOMEM; 1201 1202 port->dev = port_dev; 1203 port->team = team; 1204 INIT_LIST_HEAD(&port->qom_list); 1205 1206 port->orig.mtu = port_dev->mtu; 1207 err = dev_set_mtu(port_dev, dev->mtu); 1208 if (err) { 1209 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err); 1210 goto err_set_mtu; 1211 } 1212 1213 memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len); 1214 1215 err = team_port_enter(team, port); 1216 if (err) { 1217 netdev_err(dev, "Device %s failed to enter team mode\n", 1218 portname); 1219 goto err_port_enter; 1220 } 1221 1222 err = dev_open(port_dev, extack); 1223 if (err) { 1224 netdev_dbg(dev, "Device %s opening failed\n", 1225 portname); 1226 goto err_dev_open; 1227 } 1228 1229 err = vlan_vids_add_by_dev(port_dev, dev); 1230 if (err) { 1231 netdev_err(dev, "Failed to add vlan ids to device %s\n", 1232 portname); 1233 goto err_vids_add; 1234 } 1235 1236 err = team_port_enable_netpoll(port); 1237 if (err) { 1238 netdev_err(dev, "Failed to enable netpoll on device %s\n", 1239 portname); 1240 goto err_enable_netpoll; 1241 } 1242 1243 if (!(dev->features & NETIF_F_LRO)) 1244 dev_disable_lro(port_dev); 1245 1246 err = netdev_rx_handler_register(port_dev, team_handle_frame, 1247 port); 1248 if (err) { 1249 netdev_err(dev, "Device %s failed to register rx_handler\n", 1250 portname); 1251 goto err_handler_register; 1252 } 1253 1254 err = team_upper_dev_link(team, port, extack); 1255 if (err) { 1256 netdev_err(dev, "Device %s failed to set upper link\n", 1257 portname); 1258 goto err_set_upper_link; 1259 } 1260 1261 err = __team_option_inst_add_port(team, port); 1262 if (err) { 1263 netdev_err(dev, "Device %s failed to add per-port options\n", 1264 portname); 1265 goto err_option_port_add; 1266 } 1267 1268 /* set promiscuity level to new slave */ 1269 if (dev->flags & IFF_PROMISC) { 1270 err = dev_set_promiscuity(port_dev, 1); 1271 if (err) 1272 goto err_set_slave_promisc; 1273 } 1274 1275 /* set allmulti level to new slave */ 1276 if (dev->flags & IFF_ALLMULTI) { 1277 err = dev_set_allmulti(port_dev, 1); 1278 if (err) { 1279 if (dev->flags & IFF_PROMISC) 1280 dev_set_promiscuity(port_dev, -1); 1281 goto err_set_slave_promisc; 1282 } 1283 } 1284 1285 if (dev->flags & IFF_UP) { 1286 netif_addr_lock_bh(dev); 1287 dev_uc_sync_multiple(port_dev, dev); 1288 dev_mc_sync_multiple(port_dev, dev); 1289 netif_addr_unlock_bh(dev); 1290 } 1291 1292 port->index = -1; 1293 list_add_tail_rcu(&port->list, &team->port_list); 1294 team_port_enable(team, port); 1295 __team_compute_features(team); 1296 __team_port_change_port_added(port, !!netif_oper_up(port_dev)); 1297 __team_options_change_check(team); 1298 1299 netdev_info(dev, "Port device %s added\n", portname); 1300 1301 return 0; 1302 1303 err_set_slave_promisc: 1304 __team_option_inst_del_port(team, port); 1305 1306 err_option_port_add: 1307 team_upper_dev_unlink(team, port); 1308 1309 err_set_upper_link: 1310 netdev_rx_handler_unregister(port_dev); 1311 1312 err_handler_register: 1313 team_port_disable_netpoll(port); 1314 1315 err_enable_netpoll: 1316 vlan_vids_del_by_dev(port_dev, dev); 1317 1318 err_vids_add: 1319 dev_close(port_dev); 1320 1321 err_dev_open: 1322 team_port_leave(team, port); 1323 team_port_set_orig_dev_addr(port); 1324 1325 err_port_enter: 1326 dev_set_mtu(port_dev, port->orig.mtu); 1327 1328 err_set_mtu: 1329 kfree(port); 1330 1331 return err; 1332 } 1333 1334 static void __team_port_change_port_removed(struct team_port *port); 1335 1336 static int team_port_del(struct team *team, struct net_device *port_dev) 1337 { 1338 struct net_device *dev = team->dev; 1339 struct team_port *port; 1340 char *portname = port_dev->name; 1341 1342 port = team_port_get_rtnl(port_dev); 1343 if (!port || !team_port_find(team, port)) { 1344 netdev_err(dev, "Device %s does not act as a port of this team\n", 1345 portname); 1346 return -ENOENT; 1347 } 1348 1349 team_port_disable(team, port); 1350 list_del_rcu(&port->list); 1351 1352 if (dev->flags & IFF_PROMISC) 1353 dev_set_promiscuity(port_dev, -1); 1354 if (dev->flags & IFF_ALLMULTI) 1355 dev_set_allmulti(port_dev, -1); 1356 1357 team_upper_dev_unlink(team, port); 1358 netdev_rx_handler_unregister(port_dev); 1359 team_port_disable_netpoll(port); 1360 vlan_vids_del_by_dev(port_dev, dev); 1361 if (dev->flags & IFF_UP) { 1362 dev_uc_unsync(port_dev, dev); 1363 dev_mc_unsync(port_dev, dev); 1364 } 1365 dev_close(port_dev); 1366 team_port_leave(team, port); 1367 1368 __team_option_inst_mark_removed_port(team, port); 1369 __team_options_change_check(team); 1370 __team_option_inst_del_port(team, port); 1371 __team_port_change_port_removed(port); 1372 1373 team_port_set_orig_dev_addr(port); 1374 dev_set_mtu(port_dev, port->orig.mtu); 1375 kfree_rcu(port, rcu); 1376 netdev_info(dev, "Port device %s removed\n", portname); 1377 __team_compute_features(team); 1378 1379 return 0; 1380 } 1381 1382 1383 /***************** 1384 * Net device ops 1385 *****************/ 1386 1387 static void team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx) 1388 { 1389 ctx->data.str_val = team->mode->kind; 1390 } 1391 1392 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx) 1393 { 1394 return team_change_mode(team, ctx->data.str_val); 1395 } 1396 1397 static void team_notify_peers_count_get(struct team *team, 1398 struct team_gsetter_ctx *ctx) 1399 { 1400 ctx->data.u32_val = team->notify_peers.count; 1401 } 1402 1403 static int team_notify_peers_count_set(struct team *team, 1404 struct team_gsetter_ctx *ctx) 1405 { 1406 team->notify_peers.count = ctx->data.u32_val; 1407 return 0; 1408 } 1409 1410 static void team_notify_peers_interval_get(struct team *team, 1411 struct team_gsetter_ctx *ctx) 1412 { 1413 ctx->data.u32_val = team->notify_peers.interval; 1414 } 1415 1416 static int team_notify_peers_interval_set(struct team *team, 1417 struct team_gsetter_ctx *ctx) 1418 { 1419 team->notify_peers.interval = ctx->data.u32_val; 1420 return 0; 1421 } 1422 1423 static void team_mcast_rejoin_count_get(struct team *team, 1424 struct team_gsetter_ctx *ctx) 1425 { 1426 ctx->data.u32_val = team->mcast_rejoin.count; 1427 } 1428 1429 static int team_mcast_rejoin_count_set(struct team *team, 1430 struct team_gsetter_ctx *ctx) 1431 { 1432 team->mcast_rejoin.count = ctx->data.u32_val; 1433 return 0; 1434 } 1435 1436 static void team_mcast_rejoin_interval_get(struct team *team, 1437 struct team_gsetter_ctx *ctx) 1438 { 1439 ctx->data.u32_val = team->mcast_rejoin.interval; 1440 } 1441 1442 static int team_mcast_rejoin_interval_set(struct team *team, 1443 struct team_gsetter_ctx *ctx) 1444 { 1445 team->mcast_rejoin.interval = ctx->data.u32_val; 1446 return 0; 1447 } 1448 1449 static void team_port_en_option_get(struct team *team, 1450 struct team_gsetter_ctx *ctx) 1451 { 1452 struct team_port *port = ctx->info->port; 1453 1454 ctx->data.bool_val = team_port_enabled(port); 1455 } 1456 1457 static int team_port_en_option_set(struct team *team, 1458 struct team_gsetter_ctx *ctx) 1459 { 1460 struct team_port *port = ctx->info->port; 1461 1462 if (ctx->data.bool_val) 1463 team_port_enable(team, port); 1464 else 1465 team_port_disable(team, port); 1466 return 0; 1467 } 1468 1469 static void team_user_linkup_option_get(struct team *team, 1470 struct team_gsetter_ctx *ctx) 1471 { 1472 struct team_port *port = ctx->info->port; 1473 1474 ctx->data.bool_val = port->user.linkup; 1475 } 1476 1477 static void __team_carrier_check(struct team *team); 1478 1479 static int team_user_linkup_option_set(struct team *team, 1480 struct team_gsetter_ctx *ctx) 1481 { 1482 struct team_port *port = ctx->info->port; 1483 1484 port->user.linkup = ctx->data.bool_val; 1485 team_refresh_port_linkup(port); 1486 __team_carrier_check(port->team); 1487 return 0; 1488 } 1489 1490 static void team_user_linkup_en_option_get(struct team *team, 1491 struct team_gsetter_ctx *ctx) 1492 { 1493 struct team_port *port = ctx->info->port; 1494 1495 ctx->data.bool_val = port->user.linkup_enabled; 1496 } 1497 1498 static int team_user_linkup_en_option_set(struct team *team, 1499 struct team_gsetter_ctx *ctx) 1500 { 1501 struct team_port *port = ctx->info->port; 1502 1503 port->user.linkup_enabled = ctx->data.bool_val; 1504 team_refresh_port_linkup(port); 1505 __team_carrier_check(port->team); 1506 return 0; 1507 } 1508 1509 static void team_priority_option_get(struct team *team, 1510 struct team_gsetter_ctx *ctx) 1511 { 1512 struct team_port *port = ctx->info->port; 1513 1514 ctx->data.s32_val = port->priority; 1515 } 1516 1517 static int team_priority_option_set(struct team *team, 1518 struct team_gsetter_ctx *ctx) 1519 { 1520 struct team_port *port = ctx->info->port; 1521 s32 priority = ctx->data.s32_val; 1522 1523 if (port->priority == priority) 1524 return 0; 1525 port->priority = priority; 1526 team_queue_override_port_prio_changed(team, port); 1527 return 0; 1528 } 1529 1530 static void team_queue_id_option_get(struct team *team, 1531 struct team_gsetter_ctx *ctx) 1532 { 1533 struct team_port *port = ctx->info->port; 1534 1535 ctx->data.u32_val = port->queue_id; 1536 } 1537 1538 static int team_queue_id_option_set(struct team *team, 1539 struct team_gsetter_ctx *ctx) 1540 { 1541 struct team_port *port = ctx->info->port; 1542 u16 new_queue_id = ctx->data.u32_val; 1543 1544 if (port->queue_id == new_queue_id) 1545 return 0; 1546 if (new_queue_id >= team->dev->real_num_tx_queues) 1547 return -EINVAL; 1548 team_queue_override_port_change_queue_id(team, port, new_queue_id); 1549 return 0; 1550 } 1551 1552 static const struct team_option team_options[] = { 1553 { 1554 .name = "mode", 1555 .type = TEAM_OPTION_TYPE_STRING, 1556 .getter = team_mode_option_get, 1557 .setter = team_mode_option_set, 1558 }, 1559 { 1560 .name = "notify_peers_count", 1561 .type = TEAM_OPTION_TYPE_U32, 1562 .getter = team_notify_peers_count_get, 1563 .setter = team_notify_peers_count_set, 1564 }, 1565 { 1566 .name = "notify_peers_interval", 1567 .type = TEAM_OPTION_TYPE_U32, 1568 .getter = team_notify_peers_interval_get, 1569 .setter = team_notify_peers_interval_set, 1570 }, 1571 { 1572 .name = "mcast_rejoin_count", 1573 .type = TEAM_OPTION_TYPE_U32, 1574 .getter = team_mcast_rejoin_count_get, 1575 .setter = team_mcast_rejoin_count_set, 1576 }, 1577 { 1578 .name = "mcast_rejoin_interval", 1579 .type = TEAM_OPTION_TYPE_U32, 1580 .getter = team_mcast_rejoin_interval_get, 1581 .setter = team_mcast_rejoin_interval_set, 1582 }, 1583 { 1584 .name = "enabled", 1585 .type = TEAM_OPTION_TYPE_BOOL, 1586 .per_port = true, 1587 .getter = team_port_en_option_get, 1588 .setter = team_port_en_option_set, 1589 }, 1590 { 1591 .name = "user_linkup", 1592 .type = TEAM_OPTION_TYPE_BOOL, 1593 .per_port = true, 1594 .getter = team_user_linkup_option_get, 1595 .setter = team_user_linkup_option_set, 1596 }, 1597 { 1598 .name = "user_linkup_enabled", 1599 .type = TEAM_OPTION_TYPE_BOOL, 1600 .per_port = true, 1601 .getter = team_user_linkup_en_option_get, 1602 .setter = team_user_linkup_en_option_set, 1603 }, 1604 { 1605 .name = "priority", 1606 .type = TEAM_OPTION_TYPE_S32, 1607 .per_port = true, 1608 .getter = team_priority_option_get, 1609 .setter = team_priority_option_set, 1610 }, 1611 { 1612 .name = "queue_id", 1613 .type = TEAM_OPTION_TYPE_U32, 1614 .per_port = true, 1615 .getter = team_queue_id_option_get, 1616 .setter = team_queue_id_option_set, 1617 }, 1618 }; 1619 1620 1621 static int team_init(struct net_device *dev) 1622 { 1623 struct team *team = netdev_priv(dev); 1624 int i; 1625 int err; 1626 1627 team->dev = dev; 1628 team_set_no_mode(team); 1629 team->notifier_ctx = false; 1630 1631 team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats); 1632 if (!team->pcpu_stats) 1633 return -ENOMEM; 1634 1635 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++) 1636 INIT_HLIST_HEAD(&team->en_port_hlist[i]); 1637 INIT_LIST_HEAD(&team->port_list); 1638 err = team_queue_override_init(team); 1639 if (err) 1640 goto err_team_queue_override_init; 1641 1642 team_adjust_ops(team); 1643 1644 INIT_LIST_HEAD(&team->option_list); 1645 INIT_LIST_HEAD(&team->option_inst_list); 1646 1647 team_notify_peers_init(team); 1648 team_mcast_rejoin_init(team); 1649 1650 err = team_options_register(team, team_options, ARRAY_SIZE(team_options)); 1651 if (err) 1652 goto err_options_register; 1653 netif_carrier_off(dev); 1654 1655 lockdep_register_key(&team->team_lock_key); 1656 __mutex_init(&team->lock, "team->team_lock_key", &team->team_lock_key); 1657 netdev_lockdep_set_classes(dev); 1658 1659 return 0; 1660 1661 err_options_register: 1662 team_mcast_rejoin_fini(team); 1663 team_notify_peers_fini(team); 1664 team_queue_override_fini(team); 1665 err_team_queue_override_init: 1666 free_percpu(team->pcpu_stats); 1667 1668 return err; 1669 } 1670 1671 static void team_uninit(struct net_device *dev) 1672 { 1673 struct team *team = netdev_priv(dev); 1674 struct team_port *port; 1675 struct team_port *tmp; 1676 1677 mutex_lock(&team->lock); 1678 list_for_each_entry_safe(port, tmp, &team->port_list, list) 1679 team_port_del(team, port->dev); 1680 1681 __team_change_mode(team, NULL); /* cleanup */ 1682 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options)); 1683 team_mcast_rejoin_fini(team); 1684 team_notify_peers_fini(team); 1685 team_queue_override_fini(team); 1686 mutex_unlock(&team->lock); 1687 netdev_change_features(dev); 1688 lockdep_unregister_key(&team->team_lock_key); 1689 } 1690 1691 static void team_destructor(struct net_device *dev) 1692 { 1693 struct team *team = netdev_priv(dev); 1694 1695 free_percpu(team->pcpu_stats); 1696 } 1697 1698 static int team_open(struct net_device *dev) 1699 { 1700 return 0; 1701 } 1702 1703 static int team_close(struct net_device *dev) 1704 { 1705 struct team *team = netdev_priv(dev); 1706 struct team_port *port; 1707 1708 list_for_each_entry(port, &team->port_list, list) { 1709 dev_uc_unsync(port->dev, dev); 1710 dev_mc_unsync(port->dev, dev); 1711 } 1712 1713 return 0; 1714 } 1715 1716 /* 1717 * note: already called with rcu_read_lock 1718 */ 1719 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev) 1720 { 1721 struct team *team = netdev_priv(dev); 1722 bool tx_success; 1723 unsigned int len = skb->len; 1724 1725 tx_success = team_queue_override_transmit(team, skb); 1726 if (!tx_success) 1727 tx_success = team->ops.transmit(team, skb); 1728 if (tx_success) { 1729 struct team_pcpu_stats *pcpu_stats; 1730 1731 pcpu_stats = this_cpu_ptr(team->pcpu_stats); 1732 u64_stats_update_begin(&pcpu_stats->syncp); 1733 u64_stats_inc(&pcpu_stats->tx_packets); 1734 u64_stats_add(&pcpu_stats->tx_bytes, len); 1735 u64_stats_update_end(&pcpu_stats->syncp); 1736 } else { 1737 this_cpu_inc(team->pcpu_stats->tx_dropped); 1738 } 1739 1740 return NETDEV_TX_OK; 1741 } 1742 1743 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb, 1744 struct net_device *sb_dev) 1745 { 1746 /* 1747 * This helper function exists to help dev_pick_tx get the correct 1748 * destination queue. Using a helper function skips a call to 1749 * skb_tx_hash and will put the skbs in the queue we expect on their 1750 * way down to the team driver. 1751 */ 1752 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0; 1753 1754 /* 1755 * Save the original txq to restore before passing to the driver 1756 */ 1757 qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping; 1758 1759 if (unlikely(txq >= dev->real_num_tx_queues)) { 1760 do { 1761 txq -= dev->real_num_tx_queues; 1762 } while (txq >= dev->real_num_tx_queues); 1763 } 1764 return txq; 1765 } 1766 1767 static void team_change_rx_flags(struct net_device *dev, int change) 1768 { 1769 struct team *team = netdev_priv(dev); 1770 struct team_port *port; 1771 int inc; 1772 1773 rcu_read_lock(); 1774 list_for_each_entry_rcu(port, &team->port_list, list) { 1775 if (change & IFF_PROMISC) { 1776 inc = dev->flags & IFF_PROMISC ? 1 : -1; 1777 dev_set_promiscuity(port->dev, inc); 1778 } 1779 if (change & IFF_ALLMULTI) { 1780 inc = dev->flags & IFF_ALLMULTI ? 1 : -1; 1781 dev_set_allmulti(port->dev, inc); 1782 } 1783 } 1784 rcu_read_unlock(); 1785 } 1786 1787 static void team_set_rx_mode(struct net_device *dev) 1788 { 1789 struct team *team = netdev_priv(dev); 1790 struct team_port *port; 1791 1792 rcu_read_lock(); 1793 list_for_each_entry_rcu(port, &team->port_list, list) { 1794 dev_uc_sync_multiple(port->dev, dev); 1795 dev_mc_sync_multiple(port->dev, dev); 1796 } 1797 rcu_read_unlock(); 1798 } 1799 1800 static int team_set_mac_address(struct net_device *dev, void *p) 1801 { 1802 struct sockaddr *addr = p; 1803 struct team *team = netdev_priv(dev); 1804 struct team_port *port; 1805 1806 if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data)) 1807 return -EADDRNOTAVAIL; 1808 dev_addr_set(dev, addr->sa_data); 1809 mutex_lock(&team->lock); 1810 list_for_each_entry(port, &team->port_list, list) 1811 if (team->ops.port_change_dev_addr) 1812 team->ops.port_change_dev_addr(team, port); 1813 mutex_unlock(&team->lock); 1814 return 0; 1815 } 1816 1817 static int team_change_mtu(struct net_device *dev, int new_mtu) 1818 { 1819 struct team *team = netdev_priv(dev); 1820 struct team_port *port; 1821 int err; 1822 1823 /* 1824 * Alhough this is reader, it's guarded by team lock. It's not possible 1825 * to traverse list in reverse under rcu_read_lock 1826 */ 1827 mutex_lock(&team->lock); 1828 team->port_mtu_change_allowed = true; 1829 list_for_each_entry(port, &team->port_list, list) { 1830 err = dev_set_mtu(port->dev, new_mtu); 1831 if (err) { 1832 netdev_err(dev, "Device %s failed to change mtu", 1833 port->dev->name); 1834 goto unwind; 1835 } 1836 } 1837 team->port_mtu_change_allowed = false; 1838 mutex_unlock(&team->lock); 1839 1840 WRITE_ONCE(dev->mtu, new_mtu); 1841 1842 return 0; 1843 1844 unwind: 1845 list_for_each_entry_continue_reverse(port, &team->port_list, list) 1846 dev_set_mtu(port->dev, dev->mtu); 1847 team->port_mtu_change_allowed = false; 1848 mutex_unlock(&team->lock); 1849 1850 return err; 1851 } 1852 1853 static void 1854 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 1855 { 1856 struct team *team = netdev_priv(dev); 1857 struct team_pcpu_stats *p; 1858 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes; 1859 u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0; 1860 unsigned int start; 1861 int i; 1862 1863 for_each_possible_cpu(i) { 1864 p = per_cpu_ptr(team->pcpu_stats, i); 1865 do { 1866 start = u64_stats_fetch_begin(&p->syncp); 1867 rx_packets = u64_stats_read(&p->rx_packets); 1868 rx_bytes = u64_stats_read(&p->rx_bytes); 1869 rx_multicast = u64_stats_read(&p->rx_multicast); 1870 tx_packets = u64_stats_read(&p->tx_packets); 1871 tx_bytes = u64_stats_read(&p->tx_bytes); 1872 } while (u64_stats_fetch_retry(&p->syncp, start)); 1873 1874 stats->rx_packets += rx_packets; 1875 stats->rx_bytes += rx_bytes; 1876 stats->multicast += rx_multicast; 1877 stats->tx_packets += tx_packets; 1878 stats->tx_bytes += tx_bytes; 1879 /* 1880 * rx_dropped, tx_dropped & rx_nohandler are u32, 1881 * updated without syncp protection. 1882 */ 1883 rx_dropped += READ_ONCE(p->rx_dropped); 1884 tx_dropped += READ_ONCE(p->tx_dropped); 1885 rx_nohandler += READ_ONCE(p->rx_nohandler); 1886 } 1887 stats->rx_dropped = rx_dropped; 1888 stats->tx_dropped = tx_dropped; 1889 stats->rx_nohandler = rx_nohandler; 1890 } 1891 1892 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) 1893 { 1894 struct team *team = netdev_priv(dev); 1895 struct team_port *port; 1896 int err; 1897 1898 /* 1899 * Alhough this is reader, it's guarded by team lock. It's not possible 1900 * to traverse list in reverse under rcu_read_lock 1901 */ 1902 mutex_lock(&team->lock); 1903 list_for_each_entry(port, &team->port_list, list) { 1904 err = vlan_vid_add(port->dev, proto, vid); 1905 if (err) 1906 goto unwind; 1907 } 1908 mutex_unlock(&team->lock); 1909 1910 return 0; 1911 1912 unwind: 1913 list_for_each_entry_continue_reverse(port, &team->port_list, list) 1914 vlan_vid_del(port->dev, proto, vid); 1915 mutex_unlock(&team->lock); 1916 1917 return err; 1918 } 1919 1920 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid) 1921 { 1922 struct team *team = netdev_priv(dev); 1923 struct team_port *port; 1924 1925 mutex_lock(&team->lock); 1926 list_for_each_entry(port, &team->port_list, list) 1927 vlan_vid_del(port->dev, proto, vid); 1928 mutex_unlock(&team->lock); 1929 1930 return 0; 1931 } 1932 1933 #ifdef CONFIG_NET_POLL_CONTROLLER 1934 static void team_poll_controller(struct net_device *dev) 1935 { 1936 } 1937 1938 static void __team_netpoll_cleanup(struct team *team) 1939 { 1940 struct team_port *port; 1941 1942 list_for_each_entry(port, &team->port_list, list) 1943 team_port_disable_netpoll(port); 1944 } 1945 1946 static void team_netpoll_cleanup(struct net_device *dev) 1947 { 1948 struct team *team = netdev_priv(dev); 1949 1950 mutex_lock(&team->lock); 1951 __team_netpoll_cleanup(team); 1952 mutex_unlock(&team->lock); 1953 } 1954 1955 static int team_netpoll_setup(struct net_device *dev) 1956 { 1957 struct team *team = netdev_priv(dev); 1958 struct team_port *port; 1959 int err = 0; 1960 1961 mutex_lock(&team->lock); 1962 list_for_each_entry(port, &team->port_list, list) { 1963 err = __team_port_enable_netpoll(port); 1964 if (err) { 1965 __team_netpoll_cleanup(team); 1966 break; 1967 } 1968 } 1969 mutex_unlock(&team->lock); 1970 return err; 1971 } 1972 #endif 1973 1974 static int team_add_slave(struct net_device *dev, struct net_device *port_dev, 1975 struct netlink_ext_ack *extack) 1976 { 1977 struct team *team = netdev_priv(dev); 1978 int err; 1979 1980 mutex_lock(&team->lock); 1981 err = team_port_add(team, port_dev, extack); 1982 mutex_unlock(&team->lock); 1983 1984 if (!err) 1985 netdev_change_features(dev); 1986 1987 return err; 1988 } 1989 1990 static int team_del_slave(struct net_device *dev, struct net_device *port_dev) 1991 { 1992 struct team *team = netdev_priv(dev); 1993 int err; 1994 1995 mutex_lock(&team->lock); 1996 err = team_port_del(team, port_dev); 1997 mutex_unlock(&team->lock); 1998 1999 if (err) 2000 return err; 2001 2002 if (netif_is_team_master(port_dev)) { 2003 lockdep_unregister_key(&team->team_lock_key); 2004 lockdep_register_key(&team->team_lock_key); 2005 lockdep_set_class(&team->lock, &team->team_lock_key); 2006 } 2007 netdev_change_features(dev); 2008 2009 return err; 2010 } 2011 2012 static netdev_features_t team_fix_features(struct net_device *dev, 2013 netdev_features_t features) 2014 { 2015 struct team_port *port; 2016 struct team *team = netdev_priv(dev); 2017 netdev_features_t mask; 2018 2019 mask = features; 2020 features = netdev_base_features(features); 2021 2022 rcu_read_lock(); 2023 list_for_each_entry_rcu(port, &team->port_list, list) { 2024 features = netdev_increment_features(features, 2025 port->dev->features, 2026 mask); 2027 } 2028 rcu_read_unlock(); 2029 2030 features = netdev_add_tso_features(features, mask); 2031 2032 return features; 2033 } 2034 2035 static int team_change_carrier(struct net_device *dev, bool new_carrier) 2036 { 2037 struct team *team = netdev_priv(dev); 2038 2039 team->user_carrier_enabled = true; 2040 2041 if (new_carrier) 2042 netif_carrier_on(dev); 2043 else 2044 netif_carrier_off(dev); 2045 return 0; 2046 } 2047 2048 static const struct net_device_ops team_netdev_ops = { 2049 .ndo_init = team_init, 2050 .ndo_uninit = team_uninit, 2051 .ndo_open = team_open, 2052 .ndo_stop = team_close, 2053 .ndo_start_xmit = team_xmit, 2054 .ndo_select_queue = team_select_queue, 2055 .ndo_change_rx_flags = team_change_rx_flags, 2056 .ndo_set_rx_mode = team_set_rx_mode, 2057 .ndo_set_mac_address = team_set_mac_address, 2058 .ndo_change_mtu = team_change_mtu, 2059 .ndo_get_stats64 = team_get_stats64, 2060 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid, 2061 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid, 2062 #ifdef CONFIG_NET_POLL_CONTROLLER 2063 .ndo_poll_controller = team_poll_controller, 2064 .ndo_netpoll_setup = team_netpoll_setup, 2065 .ndo_netpoll_cleanup = team_netpoll_cleanup, 2066 #endif 2067 .ndo_add_slave = team_add_slave, 2068 .ndo_del_slave = team_del_slave, 2069 .ndo_fix_features = team_fix_features, 2070 .ndo_change_carrier = team_change_carrier, 2071 .ndo_features_check = passthru_features_check, 2072 }; 2073 2074 /*********************** 2075 * ethtool interface 2076 ***********************/ 2077 2078 static void team_ethtool_get_drvinfo(struct net_device *dev, 2079 struct ethtool_drvinfo *drvinfo) 2080 { 2081 strscpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver)); 2082 } 2083 2084 static int team_ethtool_get_link_ksettings(struct net_device *dev, 2085 struct ethtool_link_ksettings *cmd) 2086 { 2087 struct team *team= netdev_priv(dev); 2088 unsigned long speed = 0; 2089 struct team_port *port; 2090 2091 cmd->base.duplex = DUPLEX_UNKNOWN; 2092 cmd->base.port = PORT_OTHER; 2093 2094 rcu_read_lock(); 2095 list_for_each_entry_rcu(port, &team->port_list, list) { 2096 if (team_port_txable(port)) { 2097 if (port->state.speed != SPEED_UNKNOWN) 2098 speed += port->state.speed; 2099 if (cmd->base.duplex == DUPLEX_UNKNOWN && 2100 port->state.duplex != DUPLEX_UNKNOWN) 2101 cmd->base.duplex = port->state.duplex; 2102 } 2103 } 2104 rcu_read_unlock(); 2105 2106 cmd->base.speed = speed ? : SPEED_UNKNOWN; 2107 2108 return 0; 2109 } 2110 2111 static const struct ethtool_ops team_ethtool_ops = { 2112 .get_drvinfo = team_ethtool_get_drvinfo, 2113 .get_link = ethtool_op_get_link, 2114 .get_link_ksettings = team_ethtool_get_link_ksettings, 2115 }; 2116 2117 /*********************** 2118 * rt netlink interface 2119 ***********************/ 2120 2121 static void team_setup_by_port(struct net_device *dev, 2122 struct net_device *port_dev) 2123 { 2124 struct team *team = netdev_priv(dev); 2125 2126 if (port_dev->type == ARPHRD_ETHER) 2127 dev->header_ops = team->header_ops_cache; 2128 else 2129 dev->header_ops = port_dev->header_ops; 2130 dev->type = port_dev->type; 2131 dev->hard_header_len = port_dev->hard_header_len; 2132 dev->needed_headroom = port_dev->needed_headroom; 2133 dev->addr_len = port_dev->addr_len; 2134 dev->mtu = port_dev->mtu; 2135 memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len); 2136 eth_hw_addr_inherit(dev, port_dev); 2137 2138 if (port_dev->flags & IFF_POINTOPOINT) { 2139 dev->flags &= ~(IFF_BROADCAST | IFF_MULTICAST); 2140 dev->flags |= (IFF_POINTOPOINT | IFF_NOARP); 2141 } else if ((port_dev->flags & (IFF_BROADCAST | IFF_MULTICAST)) == 2142 (IFF_BROADCAST | IFF_MULTICAST)) { 2143 dev->flags |= (IFF_BROADCAST | IFF_MULTICAST); 2144 dev->flags &= ~(IFF_POINTOPOINT | IFF_NOARP); 2145 } 2146 } 2147 2148 static int team_dev_type_check_change(struct net_device *dev, 2149 struct net_device *port_dev) 2150 { 2151 struct team *team = netdev_priv(dev); 2152 char *portname = port_dev->name; 2153 int err; 2154 2155 if (dev->type == port_dev->type) 2156 return 0; 2157 if (!list_empty(&team->port_list)) { 2158 netdev_err(dev, "Device %s is of different type\n", portname); 2159 return -EBUSY; 2160 } 2161 err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev); 2162 err = notifier_to_errno(err); 2163 if (err) { 2164 netdev_err(dev, "Refused to change device type\n"); 2165 return err; 2166 } 2167 dev_uc_flush(dev); 2168 dev_mc_flush(dev); 2169 team_setup_by_port(dev, port_dev); 2170 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev); 2171 return 0; 2172 } 2173 2174 static void team_setup(struct net_device *dev) 2175 { 2176 struct team *team = netdev_priv(dev); 2177 2178 ether_setup(dev); 2179 dev->max_mtu = ETH_MAX_MTU; 2180 team->header_ops_cache = dev->header_ops; 2181 2182 dev->netdev_ops = &team_netdev_ops; 2183 dev->ethtool_ops = &team_ethtool_ops; 2184 dev->needs_free_netdev = true; 2185 dev->priv_destructor = team_destructor; 2186 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); 2187 dev->priv_flags |= IFF_NO_QUEUE; 2188 dev->priv_flags |= IFF_TEAM; 2189 2190 /* 2191 * Indicate we support unicast address filtering. That way core won't 2192 * bring us to promisc mode in case a unicast addr is added. 2193 * Let this up to underlay drivers. 2194 */ 2195 dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE; 2196 dev->lltx = true; 2197 2198 /* Don't allow team devices to change network namespaces. */ 2199 dev->netns_local = true; 2200 2201 dev->features |= NETIF_F_GRO; 2202 2203 dev->hw_features = TEAM_VLAN_FEATURES | 2204 NETIF_F_HW_VLAN_CTAG_RX | 2205 NETIF_F_HW_VLAN_CTAG_FILTER | 2206 NETIF_F_HW_VLAN_STAG_RX | 2207 NETIF_F_HW_VLAN_STAG_FILTER; 2208 2209 dev->hw_features |= NETIF_F_GSO_ENCAP_ALL; 2210 dev->features |= dev->hw_features; 2211 dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; 2212 } 2213 2214 static int team_newlink(struct net *src_net, struct net_device *dev, 2215 struct nlattr *tb[], struct nlattr *data[], 2216 struct netlink_ext_ack *extack) 2217 { 2218 if (tb[IFLA_ADDRESS] == NULL) 2219 eth_hw_addr_random(dev); 2220 2221 return register_netdevice(dev); 2222 } 2223 2224 static int team_validate(struct nlattr *tb[], struct nlattr *data[], 2225 struct netlink_ext_ack *extack) 2226 { 2227 if (tb[IFLA_ADDRESS]) { 2228 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) 2229 return -EINVAL; 2230 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) 2231 return -EADDRNOTAVAIL; 2232 } 2233 return 0; 2234 } 2235 2236 static unsigned int team_get_num_tx_queues(void) 2237 { 2238 return TEAM_DEFAULT_NUM_TX_QUEUES; 2239 } 2240 2241 static unsigned int team_get_num_rx_queues(void) 2242 { 2243 return TEAM_DEFAULT_NUM_RX_QUEUES; 2244 } 2245 2246 static struct rtnl_link_ops team_link_ops __read_mostly = { 2247 .kind = DRV_NAME, 2248 .priv_size = sizeof(struct team), 2249 .setup = team_setup, 2250 .newlink = team_newlink, 2251 .validate = team_validate, 2252 .get_num_tx_queues = team_get_num_tx_queues, 2253 .get_num_rx_queues = team_get_num_rx_queues, 2254 }; 2255 2256 2257 /*********************************** 2258 * Generic netlink custom interface 2259 ***********************************/ 2260 2261 static struct genl_family team_nl_family; 2262 2263 int team_nl_noop_doit(struct sk_buff *skb, struct genl_info *info) 2264 { 2265 struct sk_buff *msg; 2266 void *hdr; 2267 int err; 2268 2269 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 2270 if (!msg) 2271 return -ENOMEM; 2272 2273 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq, 2274 &team_nl_family, 0, TEAM_CMD_NOOP); 2275 if (!hdr) { 2276 err = -EMSGSIZE; 2277 goto err_msg_put; 2278 } 2279 2280 genlmsg_end(msg, hdr); 2281 2282 return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid); 2283 2284 err_msg_put: 2285 nlmsg_free(msg); 2286 2287 return err; 2288 } 2289 2290 /* 2291 * Netlink cmd functions should be locked by following two functions. 2292 * Since dev gets held here, that ensures dev won't disappear in between. 2293 */ 2294 static struct team *team_nl_team_get(struct genl_info *info) 2295 { 2296 struct net *net = genl_info_net(info); 2297 int ifindex; 2298 struct net_device *dev; 2299 struct team *team; 2300 2301 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX]) 2302 return NULL; 2303 2304 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]); 2305 dev = dev_get_by_index(net, ifindex); 2306 if (!dev || dev->netdev_ops != &team_netdev_ops) { 2307 dev_put(dev); 2308 return NULL; 2309 } 2310 2311 team = netdev_priv(dev); 2312 mutex_lock(&team->lock); 2313 return team; 2314 } 2315 2316 static void team_nl_team_put(struct team *team) 2317 { 2318 mutex_unlock(&team->lock); 2319 dev_put(team->dev); 2320 } 2321 2322 typedef int team_nl_send_func_t(struct sk_buff *skb, 2323 struct team *team, u32 portid); 2324 2325 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid) 2326 { 2327 return genlmsg_unicast(dev_net(team->dev), skb, portid); 2328 } 2329 2330 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team, 2331 struct team_option_inst *opt_inst) 2332 { 2333 struct nlattr *option_item; 2334 struct team_option *option = opt_inst->option; 2335 struct team_option_inst_info *opt_inst_info = &opt_inst->info; 2336 struct team_gsetter_ctx ctx; 2337 int err; 2338 2339 ctx.info = opt_inst_info; 2340 err = team_option_get(team, opt_inst, &ctx); 2341 if (err) 2342 return err; 2343 2344 option_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_OPTION); 2345 if (!option_item) 2346 return -EMSGSIZE; 2347 2348 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name)) 2349 goto nest_cancel; 2350 if (opt_inst_info->port && 2351 nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX, 2352 opt_inst_info->port->dev->ifindex)) 2353 goto nest_cancel; 2354 if (opt_inst->option->array_size && 2355 nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX, 2356 opt_inst_info->array_index)) 2357 goto nest_cancel; 2358 2359 switch (option->type) { 2360 case TEAM_OPTION_TYPE_U32: 2361 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32)) 2362 goto nest_cancel; 2363 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val)) 2364 goto nest_cancel; 2365 break; 2366 case TEAM_OPTION_TYPE_STRING: 2367 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING)) 2368 goto nest_cancel; 2369 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA, 2370 ctx.data.str_val)) 2371 goto nest_cancel; 2372 break; 2373 case TEAM_OPTION_TYPE_BINARY: 2374 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY)) 2375 goto nest_cancel; 2376 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len, 2377 ctx.data.bin_val.ptr)) 2378 goto nest_cancel; 2379 break; 2380 case TEAM_OPTION_TYPE_BOOL: 2381 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG)) 2382 goto nest_cancel; 2383 if (ctx.data.bool_val && 2384 nla_put_flag(skb, TEAM_ATTR_OPTION_DATA)) 2385 goto nest_cancel; 2386 break; 2387 case TEAM_OPTION_TYPE_S32: 2388 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32)) 2389 goto nest_cancel; 2390 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val)) 2391 goto nest_cancel; 2392 break; 2393 default: 2394 BUG(); 2395 } 2396 if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED)) 2397 goto nest_cancel; 2398 if (opt_inst->changed) { 2399 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED)) 2400 goto nest_cancel; 2401 opt_inst->changed = false; 2402 } 2403 nla_nest_end(skb, option_item); 2404 return 0; 2405 2406 nest_cancel: 2407 nla_nest_cancel(skb, option_item); 2408 return -EMSGSIZE; 2409 } 2410 2411 static int __send_and_alloc_skb(struct sk_buff **pskb, 2412 struct team *team, u32 portid, 2413 team_nl_send_func_t *send_func) 2414 { 2415 int err; 2416 2417 if (*pskb) { 2418 err = send_func(*pskb, team, portid); 2419 if (err) 2420 return err; 2421 } 2422 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL); 2423 if (!*pskb) 2424 return -ENOMEM; 2425 return 0; 2426 } 2427 2428 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq, 2429 int flags, team_nl_send_func_t *send_func, 2430 struct list_head *sel_opt_inst_list) 2431 { 2432 struct nlattr *option_list; 2433 struct nlmsghdr *nlh; 2434 void *hdr; 2435 struct team_option_inst *opt_inst; 2436 int err; 2437 struct sk_buff *skb = NULL; 2438 bool incomplete; 2439 int i; 2440 2441 opt_inst = list_first_entry(sel_opt_inst_list, 2442 struct team_option_inst, tmp_list); 2443 2444 start_again: 2445 err = __send_and_alloc_skb(&skb, team, portid, send_func); 2446 if (err) 2447 return err; 2448 2449 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI, 2450 TEAM_CMD_OPTIONS_GET); 2451 if (!hdr) { 2452 nlmsg_free(skb); 2453 return -EMSGSIZE; 2454 } 2455 2456 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex)) 2457 goto nla_put_failure; 2458 option_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_OPTION); 2459 if (!option_list) 2460 goto nla_put_failure; 2461 2462 i = 0; 2463 incomplete = false; 2464 list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) { 2465 err = team_nl_fill_one_option_get(skb, team, opt_inst); 2466 if (err) { 2467 if (err == -EMSGSIZE) { 2468 if (!i) 2469 goto errout; 2470 incomplete = true; 2471 break; 2472 } 2473 goto errout; 2474 } 2475 i++; 2476 } 2477 2478 nla_nest_end(skb, option_list); 2479 genlmsg_end(skb, hdr); 2480 if (incomplete) 2481 goto start_again; 2482 2483 send_done: 2484 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI); 2485 if (!nlh) { 2486 err = __send_and_alloc_skb(&skb, team, portid, send_func); 2487 if (err) 2488 return err; 2489 goto send_done; 2490 } 2491 2492 return send_func(skb, team, portid); 2493 2494 nla_put_failure: 2495 err = -EMSGSIZE; 2496 errout: 2497 nlmsg_free(skb); 2498 return err; 2499 } 2500 2501 int team_nl_options_get_doit(struct sk_buff *skb, struct genl_info *info) 2502 { 2503 struct team *team; 2504 struct team_option_inst *opt_inst; 2505 int err; 2506 LIST_HEAD(sel_opt_inst_list); 2507 2508 team = team_nl_team_get(info); 2509 if (!team) 2510 return -EINVAL; 2511 2512 list_for_each_entry(opt_inst, &team->option_inst_list, list) 2513 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list); 2514 err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq, 2515 NLM_F_ACK, team_nl_send_unicast, 2516 &sel_opt_inst_list); 2517 2518 team_nl_team_put(team); 2519 2520 return err; 2521 } 2522 2523 static int team_nl_send_event_options_get(struct team *team, 2524 struct list_head *sel_opt_inst_list); 2525 2526 int team_nl_options_set_doit(struct sk_buff *skb, struct genl_info *info) 2527 { 2528 struct team *team; 2529 int err = 0; 2530 int i; 2531 struct nlattr *nl_option; 2532 2533 rtnl_lock(); 2534 2535 team = team_nl_team_get(info); 2536 if (!team) { 2537 err = -EINVAL; 2538 goto rtnl_unlock; 2539 } 2540 2541 err = -EINVAL; 2542 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) { 2543 err = -EINVAL; 2544 goto team_put; 2545 } 2546 2547 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) { 2548 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1]; 2549 struct nlattr *attr; 2550 struct nlattr *attr_data; 2551 LIST_HEAD(opt_inst_list); 2552 enum team_option_type opt_type; 2553 int opt_port_ifindex = 0; /* != 0 for per-port options */ 2554 u32 opt_array_index = 0; 2555 bool opt_is_array = false; 2556 struct team_option_inst *opt_inst; 2557 char *opt_name; 2558 bool opt_found = false; 2559 2560 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) { 2561 err = -EINVAL; 2562 goto team_put; 2563 } 2564 err = nla_parse_nested_deprecated(opt_attrs, 2565 TEAM_ATTR_OPTION_MAX, 2566 nl_option, 2567 team_attr_option_nl_policy, 2568 info->extack); 2569 if (err) 2570 goto team_put; 2571 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] || 2572 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) { 2573 err = -EINVAL; 2574 goto team_put; 2575 } 2576 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) { 2577 case NLA_U32: 2578 opt_type = TEAM_OPTION_TYPE_U32; 2579 break; 2580 case NLA_STRING: 2581 opt_type = TEAM_OPTION_TYPE_STRING; 2582 break; 2583 case NLA_BINARY: 2584 opt_type = TEAM_OPTION_TYPE_BINARY; 2585 break; 2586 case NLA_FLAG: 2587 opt_type = TEAM_OPTION_TYPE_BOOL; 2588 break; 2589 case NLA_S32: 2590 opt_type = TEAM_OPTION_TYPE_S32; 2591 break; 2592 default: 2593 goto team_put; 2594 } 2595 2596 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA]; 2597 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) { 2598 err = -EINVAL; 2599 goto team_put; 2600 } 2601 2602 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]); 2603 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX]; 2604 if (attr) 2605 opt_port_ifindex = nla_get_u32(attr); 2606 2607 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX]; 2608 if (attr) { 2609 opt_is_array = true; 2610 opt_array_index = nla_get_u32(attr); 2611 } 2612 2613 list_for_each_entry(opt_inst, &team->option_inst_list, list) { 2614 struct team_option *option = opt_inst->option; 2615 struct team_gsetter_ctx ctx; 2616 struct team_option_inst_info *opt_inst_info; 2617 int tmp_ifindex; 2618 2619 opt_inst_info = &opt_inst->info; 2620 tmp_ifindex = opt_inst_info->port ? 2621 opt_inst_info->port->dev->ifindex : 0; 2622 if (option->type != opt_type || 2623 strcmp(option->name, opt_name) || 2624 tmp_ifindex != opt_port_ifindex || 2625 (option->array_size && !opt_is_array) || 2626 opt_inst_info->array_index != opt_array_index) 2627 continue; 2628 opt_found = true; 2629 ctx.info = opt_inst_info; 2630 switch (opt_type) { 2631 case TEAM_OPTION_TYPE_U32: 2632 ctx.data.u32_val = nla_get_u32(attr_data); 2633 break; 2634 case TEAM_OPTION_TYPE_STRING: 2635 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) { 2636 err = -EINVAL; 2637 goto team_put; 2638 } 2639 ctx.data.str_val = nla_data(attr_data); 2640 break; 2641 case TEAM_OPTION_TYPE_BINARY: 2642 ctx.data.bin_val.len = nla_len(attr_data); 2643 ctx.data.bin_val.ptr = nla_data(attr_data); 2644 break; 2645 case TEAM_OPTION_TYPE_BOOL: 2646 ctx.data.bool_val = attr_data ? true : false; 2647 break; 2648 case TEAM_OPTION_TYPE_S32: 2649 ctx.data.s32_val = nla_get_s32(attr_data); 2650 break; 2651 default: 2652 BUG(); 2653 } 2654 err = team_option_set(team, opt_inst, &ctx); 2655 if (err) 2656 goto team_put; 2657 opt_inst->changed = true; 2658 list_add(&opt_inst->tmp_list, &opt_inst_list); 2659 } 2660 if (!opt_found) { 2661 err = -ENOENT; 2662 goto team_put; 2663 } 2664 2665 err = team_nl_send_event_options_get(team, &opt_inst_list); 2666 if (err) 2667 break; 2668 } 2669 2670 team_put: 2671 team_nl_team_put(team); 2672 rtnl_unlock: 2673 rtnl_unlock(); 2674 return err; 2675 } 2676 2677 static int team_nl_fill_one_port_get(struct sk_buff *skb, 2678 struct team_port *port) 2679 { 2680 struct nlattr *port_item; 2681 2682 port_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_PORT); 2683 if (!port_item) 2684 goto nest_cancel; 2685 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex)) 2686 goto nest_cancel; 2687 if (port->changed) { 2688 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED)) 2689 goto nest_cancel; 2690 port->changed = false; 2691 } 2692 if ((port->removed && 2693 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) || 2694 (port->state.linkup && 2695 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) || 2696 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) || 2697 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex)) 2698 goto nest_cancel; 2699 nla_nest_end(skb, port_item); 2700 return 0; 2701 2702 nest_cancel: 2703 nla_nest_cancel(skb, port_item); 2704 return -EMSGSIZE; 2705 } 2706 2707 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq, 2708 int flags, team_nl_send_func_t *send_func, 2709 struct team_port *one_port) 2710 { 2711 struct nlattr *port_list; 2712 struct nlmsghdr *nlh; 2713 void *hdr; 2714 struct team_port *port; 2715 int err; 2716 struct sk_buff *skb = NULL; 2717 bool incomplete; 2718 int i; 2719 2720 port = list_first_entry_or_null(&team->port_list, 2721 struct team_port, list); 2722 2723 start_again: 2724 err = __send_and_alloc_skb(&skb, team, portid, send_func); 2725 if (err) 2726 return err; 2727 2728 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI, 2729 TEAM_CMD_PORT_LIST_GET); 2730 if (!hdr) { 2731 nlmsg_free(skb); 2732 return -EMSGSIZE; 2733 } 2734 2735 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex)) 2736 goto nla_put_failure; 2737 port_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_PORT); 2738 if (!port_list) 2739 goto nla_put_failure; 2740 2741 i = 0; 2742 incomplete = false; 2743 2744 /* If one port is selected, called wants to send port list containing 2745 * only this port. Otherwise go through all listed ports and send all 2746 */ 2747 if (one_port) { 2748 err = team_nl_fill_one_port_get(skb, one_port); 2749 if (err) 2750 goto errout; 2751 } else if (port) { 2752 list_for_each_entry_from(port, &team->port_list, list) { 2753 err = team_nl_fill_one_port_get(skb, port); 2754 if (err) { 2755 if (err == -EMSGSIZE) { 2756 if (!i) 2757 goto errout; 2758 incomplete = true; 2759 break; 2760 } 2761 goto errout; 2762 } 2763 i++; 2764 } 2765 } 2766 2767 nla_nest_end(skb, port_list); 2768 genlmsg_end(skb, hdr); 2769 if (incomplete) 2770 goto start_again; 2771 2772 send_done: 2773 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI); 2774 if (!nlh) { 2775 err = __send_and_alloc_skb(&skb, team, portid, send_func); 2776 if (err) 2777 return err; 2778 goto send_done; 2779 } 2780 2781 return send_func(skb, team, portid); 2782 2783 nla_put_failure: 2784 err = -EMSGSIZE; 2785 errout: 2786 nlmsg_free(skb); 2787 return err; 2788 } 2789 2790 int team_nl_port_list_get_doit(struct sk_buff *skb, 2791 struct genl_info *info) 2792 { 2793 struct team *team; 2794 int err; 2795 2796 team = team_nl_team_get(info); 2797 if (!team) 2798 return -EINVAL; 2799 2800 err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq, 2801 NLM_F_ACK, team_nl_send_unicast, NULL); 2802 2803 team_nl_team_put(team); 2804 2805 return err; 2806 } 2807 2808 static const struct genl_multicast_group team_nl_mcgrps[] = { 2809 { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, }, 2810 }; 2811 2812 static struct genl_family team_nl_family __ro_after_init = { 2813 .name = TEAM_GENL_NAME, 2814 .version = TEAM_GENL_VERSION, 2815 .maxattr = ARRAY_SIZE(team_nl_policy) - 1, 2816 .policy = team_nl_policy, 2817 .netnsok = true, 2818 .module = THIS_MODULE, 2819 .small_ops = team_nl_ops, 2820 .n_small_ops = ARRAY_SIZE(team_nl_ops), 2821 .resv_start_op = TEAM_CMD_PORT_LIST_GET + 1, 2822 .mcgrps = team_nl_mcgrps, 2823 .n_mcgrps = ARRAY_SIZE(team_nl_mcgrps), 2824 }; 2825 2826 static int team_nl_send_multicast(struct sk_buff *skb, 2827 struct team *team, u32 portid) 2828 { 2829 return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev), 2830 skb, 0, 0, GFP_KERNEL); 2831 } 2832 2833 static int team_nl_send_event_options_get(struct team *team, 2834 struct list_head *sel_opt_inst_list) 2835 { 2836 return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast, 2837 sel_opt_inst_list); 2838 } 2839 2840 static int team_nl_send_event_port_get(struct team *team, 2841 struct team_port *port) 2842 { 2843 return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast, 2844 port); 2845 } 2846 2847 static int __init team_nl_init(void) 2848 { 2849 return genl_register_family(&team_nl_family); 2850 } 2851 2852 static void __exit team_nl_fini(void) 2853 { 2854 genl_unregister_family(&team_nl_family); 2855 } 2856 2857 2858 /****************** 2859 * Change checkers 2860 ******************/ 2861 2862 static void __team_options_change_check(struct team *team) 2863 { 2864 int err; 2865 struct team_option_inst *opt_inst; 2866 LIST_HEAD(sel_opt_inst_list); 2867 2868 list_for_each_entry(opt_inst, &team->option_inst_list, list) { 2869 if (opt_inst->changed) 2870 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list); 2871 } 2872 err = team_nl_send_event_options_get(team, &sel_opt_inst_list); 2873 if (err && err != -ESRCH) 2874 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n", 2875 err); 2876 } 2877 2878 /* rtnl lock is held */ 2879 2880 static void __team_port_change_send(struct team_port *port, bool linkup) 2881 { 2882 int err; 2883 2884 port->changed = true; 2885 port->state.linkup = linkup; 2886 team_refresh_port_linkup(port); 2887 if (linkup) { 2888 struct ethtool_link_ksettings ecmd; 2889 2890 err = __ethtool_get_link_ksettings(port->dev, &ecmd); 2891 if (!err) { 2892 port->state.speed = ecmd.base.speed; 2893 port->state.duplex = ecmd.base.duplex; 2894 goto send_event; 2895 } 2896 } 2897 port->state.speed = 0; 2898 port->state.duplex = 0; 2899 2900 send_event: 2901 err = team_nl_send_event_port_get(port->team, port); 2902 if (err && err != -ESRCH) 2903 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n", 2904 port->dev->name, err); 2905 2906 } 2907 2908 static void __team_carrier_check(struct team *team) 2909 { 2910 struct team_port *port; 2911 bool team_linkup; 2912 2913 if (team->user_carrier_enabled) 2914 return; 2915 2916 team_linkup = false; 2917 list_for_each_entry(port, &team->port_list, list) { 2918 if (port->linkup) { 2919 team_linkup = true; 2920 break; 2921 } 2922 } 2923 2924 if (team_linkup) 2925 netif_carrier_on(team->dev); 2926 else 2927 netif_carrier_off(team->dev); 2928 } 2929 2930 static void __team_port_change_check(struct team_port *port, bool linkup) 2931 { 2932 if (port->state.linkup != linkup) 2933 __team_port_change_send(port, linkup); 2934 __team_carrier_check(port->team); 2935 } 2936 2937 static void __team_port_change_port_added(struct team_port *port, bool linkup) 2938 { 2939 __team_port_change_send(port, linkup); 2940 __team_carrier_check(port->team); 2941 } 2942 2943 static void __team_port_change_port_removed(struct team_port *port) 2944 { 2945 port->removed = true; 2946 __team_port_change_send(port, false); 2947 __team_carrier_check(port->team); 2948 } 2949 2950 static void team_port_change_check(struct team_port *port, bool linkup) 2951 { 2952 struct team *team = port->team; 2953 2954 mutex_lock(&team->lock); 2955 __team_port_change_check(port, linkup); 2956 mutex_unlock(&team->lock); 2957 } 2958 2959 2960 /************************************ 2961 * Net device notifier event handler 2962 ************************************/ 2963 2964 static int team_device_event(struct notifier_block *unused, 2965 unsigned long event, void *ptr) 2966 { 2967 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 2968 struct team_port *port; 2969 2970 port = team_port_get_rtnl(dev); 2971 if (!port) 2972 return NOTIFY_DONE; 2973 2974 switch (event) { 2975 case NETDEV_UP: 2976 if (netif_oper_up(dev)) 2977 team_port_change_check(port, true); 2978 break; 2979 case NETDEV_DOWN: 2980 team_port_change_check(port, false); 2981 break; 2982 case NETDEV_CHANGE: 2983 if (netif_running(port->dev)) 2984 team_port_change_check(port, 2985 !!netif_oper_up(port->dev)); 2986 break; 2987 case NETDEV_UNREGISTER: 2988 team_del_slave(port->team->dev, dev); 2989 break; 2990 case NETDEV_FEAT_CHANGE: 2991 if (!port->team->notifier_ctx) { 2992 port->team->notifier_ctx = true; 2993 team_compute_features(port->team); 2994 port->team->notifier_ctx = false; 2995 } 2996 break; 2997 case NETDEV_PRECHANGEMTU: 2998 /* Forbid to change mtu of underlaying device */ 2999 if (!port->team->port_mtu_change_allowed) 3000 return NOTIFY_BAD; 3001 break; 3002 case NETDEV_PRE_TYPE_CHANGE: 3003 /* Forbid to change type of underlaying device */ 3004 return NOTIFY_BAD; 3005 case NETDEV_RESEND_IGMP: 3006 /* Propagate to master device */ 3007 call_netdevice_notifiers(event, port->team->dev); 3008 break; 3009 } 3010 return NOTIFY_DONE; 3011 } 3012 3013 static struct notifier_block team_notifier_block __read_mostly = { 3014 .notifier_call = team_device_event, 3015 }; 3016 3017 3018 /*********************** 3019 * Module init and exit 3020 ***********************/ 3021 3022 static int __init team_module_init(void) 3023 { 3024 int err; 3025 3026 register_netdevice_notifier(&team_notifier_block); 3027 3028 err = rtnl_link_register(&team_link_ops); 3029 if (err) 3030 goto err_rtnl_reg; 3031 3032 err = team_nl_init(); 3033 if (err) 3034 goto err_nl_init; 3035 3036 return 0; 3037 3038 err_nl_init: 3039 rtnl_link_unregister(&team_link_ops); 3040 3041 err_rtnl_reg: 3042 unregister_netdevice_notifier(&team_notifier_block); 3043 3044 return err; 3045 } 3046 3047 static void __exit team_module_exit(void) 3048 { 3049 team_nl_fini(); 3050 rtnl_link_unregister(&team_link_ops); 3051 unregister_netdevice_notifier(&team_notifier_block); 3052 } 3053 3054 module_init(team_module_init); 3055 module_exit(team_module_exit); 3056 3057 MODULE_LICENSE("GPL v2"); 3058 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>"); 3059 MODULE_DESCRIPTION("Ethernet team device driver"); 3060 MODULE_ALIAS_RTNL_LINK(DRV_NAME); 3061