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/netdev_lock.h> 27 #include <net/netlink.h> 28 #include <net/sch_generic.h> 29 #include <linux/if_team.h> 30 31 #include "team_nl.h" 32 33 #define DRV_NAME "team" 34 35 36 /********** 37 * Helpers 38 **********/ 39 40 static struct team_port *team_port_get_rtnl(const struct net_device *dev) 41 { 42 struct team_port *port = rtnl_dereference(dev->rx_handler_data); 43 44 return netif_is_team_port(dev) ? port : NULL; 45 } 46 47 /* 48 * Since the ability to change device address for open port device is tested in 49 * team_port_add, this function can be called without control of return value 50 */ 51 static int __set_port_dev_addr(struct net_device *port_dev, 52 const unsigned char *dev_addr) 53 { 54 struct sockaddr_storage addr; 55 56 memcpy(addr.__data, dev_addr, port_dev->addr_len); 57 addr.ss_family = port_dev->type; 58 return dev_set_mac_address(port_dev, &addr, NULL); 59 } 60 61 static int team_port_set_orig_dev_addr(struct team_port *port) 62 { 63 return __set_port_dev_addr(port->dev, port->orig.dev_addr); 64 } 65 66 static int team_port_set_team_dev_addr(struct team *team, 67 struct team_port *port) 68 { 69 return __set_port_dev_addr(port->dev, team->dev->dev_addr); 70 } 71 72 int team_modeop_port_enter(struct team *team, struct team_port *port) 73 { 74 return team_port_set_team_dev_addr(team, port); 75 } 76 EXPORT_SYMBOL(team_modeop_port_enter); 77 78 void team_modeop_port_change_dev_addr(struct team *team, 79 struct team_port *port) 80 { 81 team_port_set_team_dev_addr(team, port); 82 } 83 EXPORT_SYMBOL(team_modeop_port_change_dev_addr); 84 85 static void team_lower_state_changed(struct team_port *port) 86 { 87 struct netdev_lag_lower_state_info info; 88 89 info.link_up = port->linkup; 90 info.tx_enabled = team_port_enabled(port); 91 netdev_lower_state_changed(port->dev, &info); 92 } 93 94 static void team_refresh_port_linkup(struct team_port *port) 95 { 96 bool new_linkup = port->user.linkup_enabled ? port->user.linkup : 97 port->state.linkup; 98 99 if (port->linkup != new_linkup) { 100 port->linkup = new_linkup; 101 team_lower_state_changed(port); 102 } 103 } 104 105 106 /******************* 107 * Options handling 108 *******************/ 109 110 struct team_option_inst { /* One for each option instance */ 111 struct list_head list; 112 struct list_head tmp_list; 113 struct team_option *option; 114 struct team_option_inst_info info; 115 bool changed; 116 bool removed; 117 }; 118 119 static struct team_option *__team_find_option(struct team *team, 120 const char *opt_name) 121 { 122 struct team_option *option; 123 124 list_for_each_entry(option, &team->option_list, list) { 125 if (strcmp(option->name, opt_name) == 0) 126 return option; 127 } 128 return NULL; 129 } 130 131 static void __team_option_inst_del(struct team_option_inst *opt_inst) 132 { 133 list_del(&opt_inst->list); 134 kfree(opt_inst); 135 } 136 137 static void __team_option_inst_del_option(struct team *team, 138 struct team_option *option) 139 { 140 struct team_option_inst *opt_inst, *tmp; 141 142 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) { 143 if (opt_inst->option == option) 144 __team_option_inst_del(opt_inst); 145 } 146 } 147 148 static int __team_option_inst_add(struct team *team, struct team_option *option, 149 struct team_port *port) 150 { 151 struct team_option_inst *opt_inst; 152 unsigned int array_size; 153 unsigned int i; 154 155 array_size = option->array_size; 156 if (!array_size) 157 array_size = 1; /* No array but still need one instance */ 158 159 for (i = 0; i < array_size; i++) { 160 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL); 161 if (!opt_inst) 162 return -ENOMEM; 163 opt_inst->option = option; 164 opt_inst->info.port = port; 165 opt_inst->info.array_index = i; 166 opt_inst->changed = true; 167 opt_inst->removed = false; 168 list_add_tail(&opt_inst->list, &team->option_inst_list); 169 if (option->init) 170 option->init(team, &opt_inst->info); 171 172 } 173 return 0; 174 } 175 176 static int __team_option_inst_add_option(struct team *team, 177 struct team_option *option) 178 { 179 int err; 180 181 if (!option->per_port) { 182 err = __team_option_inst_add(team, option, NULL); 183 if (err) 184 goto inst_del_option; 185 } 186 return 0; 187 188 inst_del_option: 189 __team_option_inst_del_option(team, option); 190 return err; 191 } 192 193 static void __team_option_inst_mark_removed_option(struct team *team, 194 struct team_option *option) 195 { 196 struct team_option_inst *opt_inst; 197 198 list_for_each_entry(opt_inst, &team->option_inst_list, list) { 199 if (opt_inst->option == option) { 200 opt_inst->changed = true; 201 opt_inst->removed = true; 202 } 203 } 204 } 205 206 static void __team_option_inst_del_port(struct team *team, 207 struct team_port *port) 208 { 209 struct team_option_inst *opt_inst, *tmp; 210 211 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) { 212 if (opt_inst->option->per_port && 213 opt_inst->info.port == port) 214 __team_option_inst_del(opt_inst); 215 } 216 } 217 218 static int __team_option_inst_add_port(struct team *team, 219 struct team_port *port) 220 { 221 struct team_option *option; 222 int err; 223 224 list_for_each_entry(option, &team->option_list, list) { 225 if (!option->per_port) 226 continue; 227 err = __team_option_inst_add(team, option, port); 228 if (err) 229 goto inst_del_port; 230 } 231 return 0; 232 233 inst_del_port: 234 __team_option_inst_del_port(team, port); 235 return err; 236 } 237 238 static void __team_option_inst_mark_removed_port(struct team *team, 239 struct team_port *port) 240 { 241 struct team_option_inst *opt_inst; 242 243 list_for_each_entry(opt_inst, &team->option_inst_list, list) { 244 if (opt_inst->info.port == port) { 245 opt_inst->changed = true; 246 opt_inst->removed = true; 247 } 248 } 249 } 250 251 static int __team_options_register(struct team *team, 252 const struct team_option *option, 253 size_t option_count) 254 { 255 int i; 256 struct team_option **dst_opts; 257 int err; 258 259 dst_opts = kcalloc(option_count, sizeof(struct team_option *), 260 GFP_KERNEL); 261 if (!dst_opts) 262 return -ENOMEM; 263 for (i = 0; i < option_count; i++, option++) { 264 if (__team_find_option(team, option->name)) { 265 err = -EEXIST; 266 goto alloc_rollback; 267 } 268 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL); 269 if (!dst_opts[i]) { 270 err = -ENOMEM; 271 goto alloc_rollback; 272 } 273 } 274 275 for (i = 0; i < option_count; i++) { 276 err = __team_option_inst_add_option(team, dst_opts[i]); 277 if (err) 278 goto inst_rollback; 279 list_add_tail(&dst_opts[i]->list, &team->option_list); 280 } 281 282 kfree(dst_opts); 283 return 0; 284 285 inst_rollback: 286 for (i--; i >= 0; i--) { 287 __team_option_inst_del_option(team, dst_opts[i]); 288 list_del(&dst_opts[i]->list); 289 } 290 291 i = option_count; 292 alloc_rollback: 293 for (i--; i >= 0; i--) 294 kfree(dst_opts[i]); 295 296 kfree(dst_opts); 297 return err; 298 } 299 300 static void __team_options_mark_removed(struct team *team, 301 const struct team_option *option, 302 size_t option_count) 303 { 304 int i; 305 306 for (i = 0; i < option_count; i++, option++) { 307 struct team_option *del_opt; 308 309 del_opt = __team_find_option(team, option->name); 310 if (del_opt) 311 __team_option_inst_mark_removed_option(team, del_opt); 312 } 313 } 314 315 static void __team_options_unregister(struct team *team, 316 const struct team_option *option, 317 size_t option_count) 318 { 319 int i; 320 321 for (i = 0; i < option_count; i++, option++) { 322 struct team_option *del_opt; 323 324 del_opt = __team_find_option(team, option->name); 325 if (del_opt) { 326 __team_option_inst_del_option(team, del_opt); 327 list_del(&del_opt->list); 328 kfree(del_opt); 329 } 330 } 331 } 332 333 static void __team_options_change_check(struct team *team); 334 335 int team_options_register(struct team *team, 336 const struct team_option *option, 337 size_t option_count) 338 { 339 int err; 340 341 err = __team_options_register(team, option, option_count); 342 if (err) 343 return err; 344 __team_options_change_check(team); 345 return 0; 346 } 347 EXPORT_SYMBOL(team_options_register); 348 349 void team_options_unregister(struct team *team, 350 const struct team_option *option, 351 size_t option_count) 352 { 353 __team_options_mark_removed(team, option, option_count); 354 __team_options_change_check(team); 355 __team_options_unregister(team, option, option_count); 356 } 357 EXPORT_SYMBOL(team_options_unregister); 358 359 static int team_option_get(struct team *team, 360 struct team_option_inst *opt_inst, 361 struct team_gsetter_ctx *ctx) 362 { 363 if (!opt_inst->option->getter) 364 return -EOPNOTSUPP; 365 366 opt_inst->option->getter(team, ctx); 367 return 0; 368 } 369 370 static int team_option_set(struct team *team, 371 struct team_option_inst *opt_inst, 372 struct team_gsetter_ctx *ctx) 373 { 374 if (!opt_inst->option->setter) 375 return -EOPNOTSUPP; 376 return opt_inst->option->setter(team, ctx); 377 } 378 379 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info) 380 { 381 struct team_option_inst *opt_inst; 382 383 opt_inst = container_of(opt_inst_info, struct team_option_inst, info); 384 opt_inst->changed = true; 385 } 386 EXPORT_SYMBOL(team_option_inst_set_change); 387 388 void team_options_change_check(struct team *team) 389 { 390 __team_options_change_check(team); 391 } 392 EXPORT_SYMBOL(team_options_change_check); 393 394 395 /**************** 396 * Mode handling 397 ****************/ 398 399 static LIST_HEAD(mode_list); 400 static DEFINE_SPINLOCK(mode_list_lock); 401 402 struct team_mode_item { 403 struct list_head list; 404 const struct team_mode *mode; 405 }; 406 407 static struct team_mode_item *__find_mode(const char *kind) 408 { 409 struct team_mode_item *mitem; 410 411 list_for_each_entry(mitem, &mode_list, list) { 412 if (strcmp(mitem->mode->kind, kind) == 0) 413 return mitem; 414 } 415 return NULL; 416 } 417 418 static bool is_good_mode_name(const char *name) 419 { 420 while (*name != '\0') { 421 if (!isalpha(*name) && !isdigit(*name) && *name != '_') 422 return false; 423 name++; 424 } 425 return true; 426 } 427 428 int team_mode_register(const struct team_mode *mode) 429 { 430 int err = 0; 431 struct team_mode_item *mitem; 432 433 if (!is_good_mode_name(mode->kind) || 434 mode->priv_size > TEAM_MODE_PRIV_SIZE) 435 return -EINVAL; 436 437 mitem = kmalloc(sizeof(*mitem), GFP_KERNEL); 438 if (!mitem) 439 return -ENOMEM; 440 441 spin_lock(&mode_list_lock); 442 if (__find_mode(mode->kind)) { 443 err = -EEXIST; 444 kfree(mitem); 445 goto unlock; 446 } 447 mitem->mode = mode; 448 list_add_tail(&mitem->list, &mode_list); 449 unlock: 450 spin_unlock(&mode_list_lock); 451 return err; 452 } 453 EXPORT_SYMBOL(team_mode_register); 454 455 void team_mode_unregister(const struct team_mode *mode) 456 { 457 struct team_mode_item *mitem; 458 459 spin_lock(&mode_list_lock); 460 mitem = __find_mode(mode->kind); 461 if (mitem) { 462 list_del_init(&mitem->list); 463 kfree(mitem); 464 } 465 spin_unlock(&mode_list_lock); 466 } 467 EXPORT_SYMBOL(team_mode_unregister); 468 469 static const struct team_mode *team_mode_get(const char *kind) 470 { 471 struct team_mode_item *mitem; 472 const struct team_mode *mode = NULL; 473 474 if (!try_module_get(THIS_MODULE)) 475 return NULL; 476 477 spin_lock(&mode_list_lock); 478 mitem = __find_mode(kind); 479 if (!mitem) { 480 spin_unlock(&mode_list_lock); 481 request_module("team-mode-%s", kind); 482 spin_lock(&mode_list_lock); 483 mitem = __find_mode(kind); 484 } 485 if (mitem) { 486 mode = mitem->mode; 487 if (!try_module_get(mode->owner)) 488 mode = NULL; 489 } 490 491 spin_unlock(&mode_list_lock); 492 module_put(THIS_MODULE); 493 return mode; 494 } 495 496 static void team_mode_put(const struct team_mode *mode) 497 { 498 module_put(mode->owner); 499 } 500 501 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb) 502 { 503 dev_kfree_skb_any(skb); 504 return false; 505 } 506 507 static rx_handler_result_t team_dummy_receive(struct team *team, 508 struct team_port *port, 509 struct sk_buff *skb) 510 { 511 return RX_HANDLER_ANOTHER; 512 } 513 514 static const struct team_mode __team_no_mode = { 515 .kind = "*NOMODE*", 516 }; 517 518 static bool team_is_mode_set(struct team *team) 519 { 520 return team->mode != &__team_no_mode; 521 } 522 523 static void team_set_no_mode(struct team *team) 524 { 525 team->user_carrier_enabled = false; 526 team->mode = &__team_no_mode; 527 } 528 529 static void team_adjust_ops(struct team *team) 530 { 531 /* 532 * To avoid checks in rx/tx skb paths, ensure here that non-null and 533 * correct ops are always set. 534 */ 535 536 if (!team->en_port_count || !team_is_mode_set(team) || 537 !team->mode->ops->transmit) 538 team->ops.transmit = team_dummy_transmit; 539 else 540 team->ops.transmit = team->mode->ops->transmit; 541 542 if (!team->en_port_count || !team_is_mode_set(team) || 543 !team->mode->ops->receive) 544 team->ops.receive = team_dummy_receive; 545 else 546 team->ops.receive = team->mode->ops->receive; 547 } 548 549 /* 550 * We can benefit from the fact that it's ensured no port is present 551 * at the time of mode change. Therefore no packets are in fly so there's no 552 * need to set mode operations in any special way. 553 */ 554 static int __team_change_mode(struct team *team, 555 const struct team_mode *new_mode) 556 { 557 /* Check if mode was previously set and do cleanup if so */ 558 if (team_is_mode_set(team)) { 559 void (*exit_op)(struct team *team) = team->ops.exit; 560 561 /* Clear ops area so no callback is called any longer */ 562 memset(&team->ops, 0, sizeof(struct team_mode_ops)); 563 team_adjust_ops(team); 564 565 if (exit_op) 566 exit_op(team); 567 team_mode_put(team->mode); 568 team_set_no_mode(team); 569 /* zero private data area */ 570 memset(&team->mode_priv, 0, 571 sizeof(struct team) - offsetof(struct team, mode_priv)); 572 } 573 574 if (!new_mode) 575 return 0; 576 577 if (new_mode->ops->init) { 578 int err; 579 580 err = new_mode->ops->init(team); 581 if (err) 582 return err; 583 } 584 585 team->mode = new_mode; 586 memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops)); 587 team_adjust_ops(team); 588 589 return 0; 590 } 591 592 static int team_change_mode(struct team *team, const char *kind) 593 { 594 const struct team_mode *new_mode; 595 struct net_device *dev = team->dev; 596 int err; 597 598 if (!list_empty(&team->port_list)) { 599 netdev_err(dev, "No ports can be present during mode change\n"); 600 return -EBUSY; 601 } 602 603 if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) { 604 netdev_err(dev, "Unable to change to the same mode the team is in\n"); 605 return -EINVAL; 606 } 607 608 new_mode = team_mode_get(kind); 609 if (!new_mode) { 610 netdev_err(dev, "Mode \"%s\" not found\n", kind); 611 return -EINVAL; 612 } 613 614 err = __team_change_mode(team, new_mode); 615 if (err) { 616 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind); 617 team_mode_put(new_mode); 618 return err; 619 } 620 621 netdev_info(dev, "Mode changed to \"%s\"\n", kind); 622 return 0; 623 } 624 625 626 /********************* 627 * Peers notification 628 *********************/ 629 630 static void team_notify_peers_work(struct work_struct *work) 631 { 632 struct team *team; 633 int val; 634 635 team = container_of(work, struct team, notify_peers.dw.work); 636 637 if (!rtnl_trylock()) { 638 schedule_delayed_work(&team->notify_peers.dw, 0); 639 return; 640 } 641 val = atomic_dec_if_positive(&team->notify_peers.count_pending); 642 if (val < 0) { 643 rtnl_unlock(); 644 return; 645 } 646 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev); 647 rtnl_unlock(); 648 if (val) 649 schedule_delayed_work(&team->notify_peers.dw, 650 msecs_to_jiffies(team->notify_peers.interval)); 651 } 652 653 static void team_notify_peers(struct team *team) 654 { 655 if (!team->notify_peers.count || !netif_running(team->dev)) 656 return; 657 atomic_add(team->notify_peers.count, &team->notify_peers.count_pending); 658 schedule_delayed_work(&team->notify_peers.dw, 0); 659 } 660 661 static void team_notify_peers_init(struct team *team) 662 { 663 INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work); 664 } 665 666 static void team_notify_peers_fini(struct team *team) 667 { 668 cancel_delayed_work_sync(&team->notify_peers.dw); 669 } 670 671 672 /******************************* 673 * Send multicast group rejoins 674 *******************************/ 675 676 static void team_mcast_rejoin_work(struct work_struct *work) 677 { 678 struct team *team; 679 int val; 680 681 team = container_of(work, struct team, mcast_rejoin.dw.work); 682 683 if (!rtnl_trylock()) { 684 schedule_delayed_work(&team->mcast_rejoin.dw, 0); 685 return; 686 } 687 val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending); 688 if (val < 0) { 689 rtnl_unlock(); 690 return; 691 } 692 call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev); 693 rtnl_unlock(); 694 if (val) 695 schedule_delayed_work(&team->mcast_rejoin.dw, 696 msecs_to_jiffies(team->mcast_rejoin.interval)); 697 } 698 699 static void team_mcast_rejoin(struct team *team) 700 { 701 if (!team->mcast_rejoin.count || !netif_running(team->dev)) 702 return; 703 atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending); 704 schedule_delayed_work(&team->mcast_rejoin.dw, 0); 705 } 706 707 static void team_mcast_rejoin_init(struct team *team) 708 { 709 INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work); 710 } 711 712 static void team_mcast_rejoin_fini(struct team *team) 713 { 714 cancel_delayed_work_sync(&team->mcast_rejoin.dw); 715 } 716 717 718 /************************ 719 * Rx path frame handler 720 ************************/ 721 722 /* note: already called with rcu_read_lock */ 723 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb) 724 { 725 struct sk_buff *skb = *pskb; 726 struct team_port *port; 727 struct team *team; 728 rx_handler_result_t res; 729 730 skb = skb_share_check(skb, GFP_ATOMIC); 731 if (!skb) 732 return RX_HANDLER_CONSUMED; 733 734 *pskb = skb; 735 736 port = team_port_get_rcu(skb->dev); 737 team = port->team; 738 if (!team_port_enabled(port)) { 739 if (is_link_local_ether_addr(eth_hdr(skb)->h_dest)) 740 /* link-local packets are mostly useful when stack receives them 741 * with the link they arrive on. 742 */ 743 return RX_HANDLER_PASS; 744 /* allow exact match delivery for disabled ports */ 745 res = RX_HANDLER_EXACT; 746 } else { 747 res = team->ops.receive(team, port, skb); 748 } 749 if (res == RX_HANDLER_ANOTHER) { 750 struct team_pcpu_stats *pcpu_stats; 751 752 pcpu_stats = this_cpu_ptr(team->pcpu_stats); 753 u64_stats_update_begin(&pcpu_stats->syncp); 754 u64_stats_inc(&pcpu_stats->rx_packets); 755 u64_stats_add(&pcpu_stats->rx_bytes, skb->len); 756 if (skb->pkt_type == PACKET_MULTICAST) 757 u64_stats_inc(&pcpu_stats->rx_multicast); 758 u64_stats_update_end(&pcpu_stats->syncp); 759 760 skb->dev = team->dev; 761 } else if (res == RX_HANDLER_EXACT) { 762 this_cpu_inc(team->pcpu_stats->rx_nohandler); 763 } else { 764 this_cpu_inc(team->pcpu_stats->rx_dropped); 765 } 766 767 return res; 768 } 769 770 771 /************************************* 772 * Multiqueue Tx port select override 773 *************************************/ 774 775 static int team_queue_override_init(struct team *team) 776 { 777 struct list_head *listarr; 778 unsigned int queue_cnt = team->dev->num_tx_queues - 1; 779 unsigned int i; 780 781 if (!queue_cnt) 782 return 0; 783 listarr = kmalloc_array(queue_cnt, sizeof(struct list_head), 784 GFP_KERNEL); 785 if (!listarr) 786 return -ENOMEM; 787 team->qom_lists = listarr; 788 for (i = 0; i < queue_cnt; i++) 789 INIT_LIST_HEAD(listarr++); 790 return 0; 791 } 792 793 static void team_queue_override_fini(struct team *team) 794 { 795 kfree(team->qom_lists); 796 } 797 798 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id) 799 { 800 return &team->qom_lists[queue_id - 1]; 801 } 802 803 /* 804 * note: already called with rcu_read_lock 805 */ 806 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb) 807 { 808 struct list_head *qom_list; 809 struct team_port *port; 810 811 if (!team->queue_override_enabled || !skb->queue_mapping) 812 return false; 813 qom_list = __team_get_qom_list(team, skb->queue_mapping); 814 list_for_each_entry_rcu(port, qom_list, qom_list) { 815 if (!team_dev_queue_xmit(team, port, skb)) 816 return true; 817 } 818 return false; 819 } 820 821 static void __team_queue_override_port_del(struct team *team, 822 struct team_port *port) 823 { 824 if (!port->queue_id) 825 return; 826 list_del_rcu(&port->qom_list); 827 } 828 829 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port, 830 struct team_port *cur) 831 { 832 if (port->priority < cur->priority) 833 return true; 834 if (port->priority > cur->priority) 835 return false; 836 if (port->index < cur->index) 837 return true; 838 return false; 839 } 840 841 static void __team_queue_override_port_add(struct team *team, 842 struct team_port *port) 843 { 844 struct team_port *cur; 845 struct list_head *qom_list; 846 struct list_head *node; 847 848 if (!port->queue_id) 849 return; 850 qom_list = __team_get_qom_list(team, port->queue_id); 851 node = qom_list; 852 list_for_each_entry(cur, qom_list, qom_list) { 853 if (team_queue_override_port_has_gt_prio_than(port, cur)) 854 break; 855 node = &cur->qom_list; 856 } 857 list_add_tail_rcu(&port->qom_list, node); 858 } 859 860 static void __team_queue_override_enabled_check(struct team *team) 861 { 862 struct team_port *port; 863 bool enabled = false; 864 865 list_for_each_entry(port, &team->port_list, list) { 866 if (port->queue_id) { 867 enabled = true; 868 break; 869 } 870 } 871 if (enabled == team->queue_override_enabled) 872 return; 873 netdev_dbg(team->dev, "%s queue override\n", 874 enabled ? "Enabling" : "Disabling"); 875 team->queue_override_enabled = enabled; 876 } 877 878 static void team_queue_override_port_prio_changed(struct team *team, 879 struct team_port *port) 880 { 881 if (!port->queue_id || team_port_enabled(port)) 882 return; 883 __team_queue_override_port_del(team, port); 884 __team_queue_override_port_add(team, port); 885 __team_queue_override_enabled_check(team); 886 } 887 888 static void team_queue_override_port_change_queue_id(struct team *team, 889 struct team_port *port, 890 u16 new_queue_id) 891 { 892 if (team_port_enabled(port)) { 893 __team_queue_override_port_del(team, port); 894 port->queue_id = new_queue_id; 895 __team_queue_override_port_add(team, port); 896 __team_queue_override_enabled_check(team); 897 } else { 898 port->queue_id = new_queue_id; 899 } 900 } 901 902 static void team_queue_override_port_add(struct team *team, 903 struct team_port *port) 904 { 905 __team_queue_override_port_add(team, port); 906 __team_queue_override_enabled_check(team); 907 } 908 909 static void team_queue_override_port_del(struct team *team, 910 struct team_port *port) 911 { 912 __team_queue_override_port_del(team, port); 913 __team_queue_override_enabled_check(team); 914 } 915 916 917 /**************** 918 * Port handling 919 ****************/ 920 921 static bool team_port_find(const struct team *team, 922 const struct team_port *port) 923 { 924 struct team_port *cur; 925 926 list_for_each_entry(cur, &team->port_list, list) 927 if (cur == port) 928 return true; 929 return false; 930 } 931 932 /* 933 * Enable/disable port by adding to enabled port hashlist and setting 934 * port->index (Might be racy so reader could see incorrect ifindex when 935 * processing a flying packet, but that is not a problem). Write guarded 936 * by RTNL. 937 */ 938 static void team_port_enable(struct team *team, 939 struct team_port *port) 940 { 941 if (team_port_enabled(port)) 942 return; 943 port->index = team->en_port_count++; 944 hlist_add_head_rcu(&port->hlist, 945 team_port_index_hash(team, port->index)); 946 team_adjust_ops(team); 947 team_queue_override_port_add(team, port); 948 if (team->ops.port_enabled) 949 team->ops.port_enabled(team, port); 950 team_notify_peers(team); 951 team_mcast_rejoin(team); 952 team_lower_state_changed(port); 953 } 954 955 static void __reconstruct_port_hlist(struct team *team, int rm_index) 956 { 957 int i; 958 struct team_port *port; 959 960 for (i = rm_index + 1; i < team->en_port_count; i++) { 961 port = team_get_port_by_index(team, i); 962 hlist_del_rcu(&port->hlist); 963 port->index--; 964 hlist_add_head_rcu(&port->hlist, 965 team_port_index_hash(team, port->index)); 966 } 967 } 968 969 static void team_port_disable(struct team *team, 970 struct team_port *port) 971 { 972 if (!team_port_enabled(port)) 973 return; 974 if (team->ops.port_disabled) 975 team->ops.port_disabled(team, port); 976 hlist_del_rcu(&port->hlist); 977 __reconstruct_port_hlist(team, port->index); 978 port->index = -1; 979 team->en_port_count--; 980 team_queue_override_port_del(team, port); 981 team_adjust_ops(team); 982 team_lower_state_changed(port); 983 } 984 985 #define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \ 986 NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE | \ 987 NETIF_F_HIGHDMA | NETIF_F_LRO | \ 988 NETIF_F_GSO_ENCAP_ALL) 989 990 #define TEAM_ENC_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \ 991 NETIF_F_RXCSUM | NETIF_F_GSO_SOFTWARE) 992 993 static void __team_compute_features(struct team *team) 994 { 995 struct team_port *port; 996 netdev_features_t vlan_features = TEAM_VLAN_FEATURES; 997 netdev_features_t enc_features = TEAM_ENC_FEATURES; 998 unsigned short max_hard_header_len = ETH_HLEN; 999 unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE | 1000 IFF_XMIT_DST_RELEASE_PERM; 1001 1002 rcu_read_lock(); 1003 if (list_empty(&team->port_list)) 1004 goto done; 1005 1006 vlan_features = netdev_base_features(vlan_features); 1007 enc_features = netdev_base_features(enc_features); 1008 1009 list_for_each_entry_rcu(port, &team->port_list, list) { 1010 vlan_features = netdev_increment_features(vlan_features, 1011 port->dev->vlan_features, 1012 TEAM_VLAN_FEATURES); 1013 enc_features = 1014 netdev_increment_features(enc_features, 1015 port->dev->hw_enc_features, 1016 TEAM_ENC_FEATURES); 1017 1018 dst_release_flag &= port->dev->priv_flags; 1019 if (port->dev->hard_header_len > max_hard_header_len) 1020 max_hard_header_len = port->dev->hard_header_len; 1021 } 1022 done: 1023 rcu_read_unlock(); 1024 1025 team->dev->vlan_features = vlan_features; 1026 team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL | 1027 NETIF_F_HW_VLAN_CTAG_TX | 1028 NETIF_F_HW_VLAN_STAG_TX; 1029 team->dev->hard_header_len = max_hard_header_len; 1030 1031 team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; 1032 if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM)) 1033 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE; 1034 } 1035 1036 static void team_compute_features(struct team *team) 1037 { 1038 __team_compute_features(team); 1039 netdev_change_features(team->dev); 1040 } 1041 1042 static int team_port_enter(struct team *team, struct team_port *port) 1043 { 1044 int err = 0; 1045 1046 dev_hold(team->dev); 1047 if (team->ops.port_enter) { 1048 err = team->ops.port_enter(team, port); 1049 if (err) { 1050 netdev_err(team->dev, "Device %s failed to enter team mode\n", 1051 port->dev->name); 1052 goto err_port_enter; 1053 } 1054 } 1055 1056 return 0; 1057 1058 err_port_enter: 1059 dev_put(team->dev); 1060 1061 return err; 1062 } 1063 1064 static void team_port_leave(struct team *team, struct team_port *port) 1065 { 1066 if (team->ops.port_leave) 1067 team->ops.port_leave(team, port); 1068 dev_put(team->dev); 1069 } 1070 1071 #ifdef CONFIG_NET_POLL_CONTROLLER 1072 static int __team_port_enable_netpoll(struct team_port *port) 1073 { 1074 struct netpoll *np; 1075 int err; 1076 1077 np = kzalloc(sizeof(*np), GFP_KERNEL); 1078 if (!np) 1079 return -ENOMEM; 1080 1081 err = __netpoll_setup(np, port->dev); 1082 if (err) { 1083 kfree(np); 1084 return err; 1085 } 1086 port->np = np; 1087 return err; 1088 } 1089 1090 static int team_port_enable_netpoll(struct team_port *port) 1091 { 1092 if (!port->team->dev->npinfo) 1093 return 0; 1094 1095 return __team_port_enable_netpoll(port); 1096 } 1097 1098 static void team_port_disable_netpoll(struct team_port *port) 1099 { 1100 struct netpoll *np = port->np; 1101 1102 if (!np) 1103 return; 1104 port->np = NULL; 1105 1106 __netpoll_free(np); 1107 } 1108 #else 1109 static int team_port_enable_netpoll(struct team_port *port) 1110 { 1111 return 0; 1112 } 1113 static void team_port_disable_netpoll(struct team_port *port) 1114 { 1115 } 1116 #endif 1117 1118 static int team_upper_dev_link(struct team *team, struct team_port *port, 1119 struct netlink_ext_ack *extack) 1120 { 1121 struct netdev_lag_upper_info lag_upper_info; 1122 int err; 1123 1124 lag_upper_info.tx_type = team->mode->lag_tx_type; 1125 lag_upper_info.hash_type = NETDEV_LAG_HASH_UNKNOWN; 1126 err = netdev_master_upper_dev_link(port->dev, team->dev, NULL, 1127 &lag_upper_info, extack); 1128 if (err) 1129 return err; 1130 port->dev->priv_flags |= IFF_TEAM_PORT; 1131 return 0; 1132 } 1133 1134 static void team_upper_dev_unlink(struct team *team, struct team_port *port) 1135 { 1136 netdev_upper_dev_unlink(port->dev, team->dev); 1137 port->dev->priv_flags &= ~IFF_TEAM_PORT; 1138 } 1139 1140 static void __team_port_change_port_added(struct team_port *port, bool linkup); 1141 static int team_dev_type_check_change(struct net_device *dev, 1142 struct net_device *port_dev); 1143 1144 static int team_port_add(struct team *team, struct net_device *port_dev, 1145 struct netlink_ext_ack *extack) 1146 { 1147 struct net_device *dev = team->dev; 1148 struct team_port *port; 1149 char *portname = port_dev->name; 1150 int err; 1151 1152 if (port_dev->flags & IFF_LOOPBACK) { 1153 NL_SET_ERR_MSG(extack, "Loopback device can't be added as a team port"); 1154 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n", 1155 portname); 1156 return -EINVAL; 1157 } 1158 1159 if (netif_is_team_port(port_dev)) { 1160 NL_SET_ERR_MSG(extack, "Device is already a port of a team device"); 1161 netdev_err(dev, "Device %s is already a port " 1162 "of a team device\n", portname); 1163 return -EBUSY; 1164 } 1165 1166 if (dev == port_dev) { 1167 NL_SET_ERR_MSG(extack, "Cannot enslave team device to itself"); 1168 netdev_err(dev, "Cannot enslave team device to itself\n"); 1169 return -EINVAL; 1170 } 1171 1172 if (netdev_has_upper_dev(dev, port_dev)) { 1173 NL_SET_ERR_MSG(extack, "Device is already an upper device of the team interface"); 1174 netdev_err(dev, "Device %s is already an upper device of the team interface\n", 1175 portname); 1176 return -EBUSY; 1177 } 1178 1179 if (netdev_has_upper_dev(port_dev, dev)) { 1180 NL_SET_ERR_MSG(extack, "Device is already a lower device of the team interface"); 1181 netdev_err(dev, "Device %s is already a lower device of the team interface\n", 1182 portname); 1183 return -EBUSY; 1184 } 1185 1186 if (port_dev->features & NETIF_F_VLAN_CHALLENGED && 1187 vlan_uses_dev(dev)) { 1188 NL_SET_ERR_MSG(extack, "Device is VLAN challenged and team device has VLAN set up"); 1189 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n", 1190 portname); 1191 return -EPERM; 1192 } 1193 1194 err = team_dev_type_check_change(dev, port_dev); 1195 if (err) 1196 return err; 1197 1198 if (port_dev->flags & IFF_UP) { 1199 NL_SET_ERR_MSG(extack, "Device is up. Set it down before adding it as a team port"); 1200 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n", 1201 portname); 1202 return -EBUSY; 1203 } 1204 1205 port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size, 1206 GFP_KERNEL); 1207 if (!port) 1208 return -ENOMEM; 1209 1210 port->dev = port_dev; 1211 port->team = team; 1212 INIT_LIST_HEAD(&port->qom_list); 1213 1214 port->orig.mtu = port_dev->mtu; 1215 err = dev_set_mtu(port_dev, dev->mtu); 1216 if (err) { 1217 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err); 1218 goto err_set_mtu; 1219 } 1220 1221 memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len); 1222 1223 err = team_port_enter(team, port); 1224 if (err) { 1225 netdev_err(dev, "Device %s failed to enter team mode\n", 1226 portname); 1227 goto err_port_enter; 1228 } 1229 1230 err = dev_open(port_dev, extack); 1231 if (err) { 1232 netdev_dbg(dev, "Device %s opening failed\n", 1233 portname); 1234 goto err_dev_open; 1235 } 1236 1237 err = vlan_vids_add_by_dev(port_dev, dev); 1238 if (err) { 1239 netdev_err(dev, "Failed to add vlan ids to device %s\n", 1240 portname); 1241 goto err_vids_add; 1242 } 1243 1244 err = team_port_enable_netpoll(port); 1245 if (err) { 1246 netdev_err(dev, "Failed to enable netpoll on device %s\n", 1247 portname); 1248 goto err_enable_netpoll; 1249 } 1250 1251 if (!(dev->features & NETIF_F_LRO)) 1252 dev_disable_lro(port_dev); 1253 1254 err = netdev_rx_handler_register(port_dev, team_handle_frame, 1255 port); 1256 if (err) { 1257 netdev_err(dev, "Device %s failed to register rx_handler\n", 1258 portname); 1259 goto err_handler_register; 1260 } 1261 1262 err = team_upper_dev_link(team, port, extack); 1263 if (err) { 1264 netdev_err(dev, "Device %s failed to set upper link\n", 1265 portname); 1266 goto err_set_upper_link; 1267 } 1268 1269 err = __team_option_inst_add_port(team, port); 1270 if (err) { 1271 netdev_err(dev, "Device %s failed to add per-port options\n", 1272 portname); 1273 goto err_option_port_add; 1274 } 1275 1276 /* set promiscuity level to new slave */ 1277 if (dev->flags & IFF_PROMISC) { 1278 err = dev_set_promiscuity(port_dev, 1); 1279 if (err) 1280 goto err_set_slave_promisc; 1281 } 1282 1283 /* set allmulti level to new slave */ 1284 if (dev->flags & IFF_ALLMULTI) { 1285 err = dev_set_allmulti(port_dev, 1); 1286 if (err) { 1287 if (dev->flags & IFF_PROMISC) 1288 dev_set_promiscuity(port_dev, -1); 1289 goto err_set_slave_promisc; 1290 } 1291 } 1292 1293 if (dev->flags & IFF_UP) { 1294 netif_addr_lock_bh(dev); 1295 dev_uc_sync_multiple(port_dev, dev); 1296 dev_mc_sync_multiple(port_dev, dev); 1297 netif_addr_unlock_bh(dev); 1298 } 1299 1300 port->index = -1; 1301 list_add_tail_rcu(&port->list, &team->port_list); 1302 team_port_enable(team, port); 1303 __team_compute_features(team); 1304 __team_port_change_port_added(port, !!netif_oper_up(port_dev)); 1305 __team_options_change_check(team); 1306 1307 netdev_info(dev, "Port device %s added\n", portname); 1308 1309 return 0; 1310 1311 err_set_slave_promisc: 1312 __team_option_inst_del_port(team, port); 1313 1314 err_option_port_add: 1315 team_upper_dev_unlink(team, port); 1316 1317 err_set_upper_link: 1318 netdev_rx_handler_unregister(port_dev); 1319 1320 err_handler_register: 1321 team_port_disable_netpoll(port); 1322 1323 err_enable_netpoll: 1324 vlan_vids_del_by_dev(port_dev, dev); 1325 1326 err_vids_add: 1327 dev_close(port_dev); 1328 1329 err_dev_open: 1330 team_port_leave(team, port); 1331 team_port_set_orig_dev_addr(port); 1332 1333 err_port_enter: 1334 dev_set_mtu(port_dev, port->orig.mtu); 1335 1336 err_set_mtu: 1337 kfree(port); 1338 1339 return err; 1340 } 1341 1342 static void __team_port_change_port_removed(struct team_port *port); 1343 1344 static int team_port_del(struct team *team, struct net_device *port_dev) 1345 { 1346 struct net_device *dev = team->dev; 1347 struct team_port *port; 1348 char *portname = port_dev->name; 1349 1350 port = team_port_get_rtnl(port_dev); 1351 if (!port || !team_port_find(team, port)) { 1352 netdev_err(dev, "Device %s does not act as a port of this team\n", 1353 portname); 1354 return -ENOENT; 1355 } 1356 1357 team_port_disable(team, port); 1358 list_del_rcu(&port->list); 1359 1360 if (dev->flags & IFF_PROMISC) 1361 dev_set_promiscuity(port_dev, -1); 1362 if (dev->flags & IFF_ALLMULTI) 1363 dev_set_allmulti(port_dev, -1); 1364 1365 team_upper_dev_unlink(team, port); 1366 netdev_rx_handler_unregister(port_dev); 1367 team_port_disable_netpoll(port); 1368 vlan_vids_del_by_dev(port_dev, dev); 1369 if (dev->flags & IFF_UP) { 1370 dev_uc_unsync(port_dev, dev); 1371 dev_mc_unsync(port_dev, dev); 1372 } 1373 dev_close(port_dev); 1374 team_port_leave(team, port); 1375 1376 __team_option_inst_mark_removed_port(team, port); 1377 __team_options_change_check(team); 1378 __team_option_inst_del_port(team, port); 1379 __team_port_change_port_removed(port); 1380 1381 team_port_set_orig_dev_addr(port); 1382 dev_set_mtu(port_dev, port->orig.mtu); 1383 kfree_rcu(port, rcu); 1384 netdev_info(dev, "Port device %s removed\n", portname); 1385 __team_compute_features(team); 1386 1387 return 0; 1388 } 1389 1390 1391 /***************** 1392 * Net device ops 1393 *****************/ 1394 1395 static void team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx) 1396 { 1397 ctx->data.str_val = team->mode->kind; 1398 } 1399 1400 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx) 1401 { 1402 return team_change_mode(team, ctx->data.str_val); 1403 } 1404 1405 static void team_notify_peers_count_get(struct team *team, 1406 struct team_gsetter_ctx *ctx) 1407 { 1408 ctx->data.u32_val = team->notify_peers.count; 1409 } 1410 1411 static int team_notify_peers_count_set(struct team *team, 1412 struct team_gsetter_ctx *ctx) 1413 { 1414 team->notify_peers.count = ctx->data.u32_val; 1415 return 0; 1416 } 1417 1418 static void team_notify_peers_interval_get(struct team *team, 1419 struct team_gsetter_ctx *ctx) 1420 { 1421 ctx->data.u32_val = team->notify_peers.interval; 1422 } 1423 1424 static int team_notify_peers_interval_set(struct team *team, 1425 struct team_gsetter_ctx *ctx) 1426 { 1427 team->notify_peers.interval = ctx->data.u32_val; 1428 return 0; 1429 } 1430 1431 static void team_mcast_rejoin_count_get(struct team *team, 1432 struct team_gsetter_ctx *ctx) 1433 { 1434 ctx->data.u32_val = team->mcast_rejoin.count; 1435 } 1436 1437 static int team_mcast_rejoin_count_set(struct team *team, 1438 struct team_gsetter_ctx *ctx) 1439 { 1440 team->mcast_rejoin.count = ctx->data.u32_val; 1441 return 0; 1442 } 1443 1444 static void team_mcast_rejoin_interval_get(struct team *team, 1445 struct team_gsetter_ctx *ctx) 1446 { 1447 ctx->data.u32_val = team->mcast_rejoin.interval; 1448 } 1449 1450 static int team_mcast_rejoin_interval_set(struct team *team, 1451 struct team_gsetter_ctx *ctx) 1452 { 1453 team->mcast_rejoin.interval = ctx->data.u32_val; 1454 return 0; 1455 } 1456 1457 static void team_port_en_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 = team_port_enabled(port); 1463 } 1464 1465 static int team_port_en_option_set(struct team *team, 1466 struct team_gsetter_ctx *ctx) 1467 { 1468 struct team_port *port = ctx->info->port; 1469 1470 if (ctx->data.bool_val) 1471 team_port_enable(team, port); 1472 else 1473 team_port_disable(team, port); 1474 return 0; 1475 } 1476 1477 static void team_user_linkup_option_get(struct team *team, 1478 struct team_gsetter_ctx *ctx) 1479 { 1480 struct team_port *port = ctx->info->port; 1481 1482 ctx->data.bool_val = port->user.linkup; 1483 } 1484 1485 static void __team_carrier_check(struct team *team); 1486 1487 static int team_user_linkup_option_set(struct team *team, 1488 struct team_gsetter_ctx *ctx) 1489 { 1490 struct team_port *port = ctx->info->port; 1491 1492 port->user.linkup = ctx->data.bool_val; 1493 team_refresh_port_linkup(port); 1494 __team_carrier_check(port->team); 1495 return 0; 1496 } 1497 1498 static void team_user_linkup_en_option_get(struct team *team, 1499 struct team_gsetter_ctx *ctx) 1500 { 1501 struct team_port *port = ctx->info->port; 1502 1503 ctx->data.bool_val = port->user.linkup_enabled; 1504 } 1505 1506 static int team_user_linkup_en_option_set(struct team *team, 1507 struct team_gsetter_ctx *ctx) 1508 { 1509 struct team_port *port = ctx->info->port; 1510 1511 port->user.linkup_enabled = ctx->data.bool_val; 1512 team_refresh_port_linkup(port); 1513 __team_carrier_check(port->team); 1514 return 0; 1515 } 1516 1517 static void team_priority_option_get(struct team *team, 1518 struct team_gsetter_ctx *ctx) 1519 { 1520 struct team_port *port = ctx->info->port; 1521 1522 ctx->data.s32_val = port->priority; 1523 } 1524 1525 static int team_priority_option_set(struct team *team, 1526 struct team_gsetter_ctx *ctx) 1527 { 1528 struct team_port *port = ctx->info->port; 1529 s32 priority = ctx->data.s32_val; 1530 1531 if (port->priority == priority) 1532 return 0; 1533 port->priority = priority; 1534 team_queue_override_port_prio_changed(team, port); 1535 return 0; 1536 } 1537 1538 static void team_queue_id_option_get(struct team *team, 1539 struct team_gsetter_ctx *ctx) 1540 { 1541 struct team_port *port = ctx->info->port; 1542 1543 ctx->data.u32_val = port->queue_id; 1544 } 1545 1546 static int team_queue_id_option_set(struct team *team, 1547 struct team_gsetter_ctx *ctx) 1548 { 1549 struct team_port *port = ctx->info->port; 1550 u16 new_queue_id = ctx->data.u32_val; 1551 1552 if (port->queue_id == new_queue_id) 1553 return 0; 1554 if (new_queue_id >= team->dev->real_num_tx_queues) 1555 return -EINVAL; 1556 team_queue_override_port_change_queue_id(team, port, new_queue_id); 1557 return 0; 1558 } 1559 1560 static const struct team_option team_options[] = { 1561 { 1562 .name = "mode", 1563 .type = TEAM_OPTION_TYPE_STRING, 1564 .getter = team_mode_option_get, 1565 .setter = team_mode_option_set, 1566 }, 1567 { 1568 .name = "notify_peers_count", 1569 .type = TEAM_OPTION_TYPE_U32, 1570 .getter = team_notify_peers_count_get, 1571 .setter = team_notify_peers_count_set, 1572 }, 1573 { 1574 .name = "notify_peers_interval", 1575 .type = TEAM_OPTION_TYPE_U32, 1576 .getter = team_notify_peers_interval_get, 1577 .setter = team_notify_peers_interval_set, 1578 }, 1579 { 1580 .name = "mcast_rejoin_count", 1581 .type = TEAM_OPTION_TYPE_U32, 1582 .getter = team_mcast_rejoin_count_get, 1583 .setter = team_mcast_rejoin_count_set, 1584 }, 1585 { 1586 .name = "mcast_rejoin_interval", 1587 .type = TEAM_OPTION_TYPE_U32, 1588 .getter = team_mcast_rejoin_interval_get, 1589 .setter = team_mcast_rejoin_interval_set, 1590 }, 1591 { 1592 .name = "enabled", 1593 .type = TEAM_OPTION_TYPE_BOOL, 1594 .per_port = true, 1595 .getter = team_port_en_option_get, 1596 .setter = team_port_en_option_set, 1597 }, 1598 { 1599 .name = "user_linkup", 1600 .type = TEAM_OPTION_TYPE_BOOL, 1601 .per_port = true, 1602 .getter = team_user_linkup_option_get, 1603 .setter = team_user_linkup_option_set, 1604 }, 1605 { 1606 .name = "user_linkup_enabled", 1607 .type = TEAM_OPTION_TYPE_BOOL, 1608 .per_port = true, 1609 .getter = team_user_linkup_en_option_get, 1610 .setter = team_user_linkup_en_option_set, 1611 }, 1612 { 1613 .name = "priority", 1614 .type = TEAM_OPTION_TYPE_S32, 1615 .per_port = true, 1616 .getter = team_priority_option_get, 1617 .setter = team_priority_option_set, 1618 }, 1619 { 1620 .name = "queue_id", 1621 .type = TEAM_OPTION_TYPE_U32, 1622 .per_port = true, 1623 .getter = team_queue_id_option_get, 1624 .setter = team_queue_id_option_set, 1625 }, 1626 }; 1627 1628 1629 static int team_init(struct net_device *dev) 1630 { 1631 struct team *team = netdev_priv(dev); 1632 int i; 1633 int err; 1634 1635 team->dev = dev; 1636 team_set_no_mode(team); 1637 team->notifier_ctx = false; 1638 1639 team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats); 1640 if (!team->pcpu_stats) 1641 return -ENOMEM; 1642 1643 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++) 1644 INIT_HLIST_HEAD(&team->en_port_hlist[i]); 1645 INIT_LIST_HEAD(&team->port_list); 1646 err = team_queue_override_init(team); 1647 if (err) 1648 goto err_team_queue_override_init; 1649 1650 team_adjust_ops(team); 1651 1652 INIT_LIST_HEAD(&team->option_list); 1653 INIT_LIST_HEAD(&team->option_inst_list); 1654 1655 team_notify_peers_init(team); 1656 team_mcast_rejoin_init(team); 1657 1658 err = team_options_register(team, team_options, ARRAY_SIZE(team_options)); 1659 if (err) 1660 goto err_options_register; 1661 netif_carrier_off(dev); 1662 1663 netdev_lockdep_set_classes(dev); 1664 1665 return 0; 1666 1667 err_options_register: 1668 team_mcast_rejoin_fini(team); 1669 team_notify_peers_fini(team); 1670 team_queue_override_fini(team); 1671 err_team_queue_override_init: 1672 free_percpu(team->pcpu_stats); 1673 1674 return err; 1675 } 1676 1677 static void team_uninit(struct net_device *dev) 1678 { 1679 struct team *team = netdev_priv(dev); 1680 struct team_port *port; 1681 struct team_port *tmp; 1682 1683 ASSERT_RTNL(); 1684 1685 list_for_each_entry_safe(port, tmp, &team->port_list, list) 1686 team_port_del(team, port->dev); 1687 1688 __team_change_mode(team, NULL); /* cleanup */ 1689 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options)); 1690 team_mcast_rejoin_fini(team); 1691 team_notify_peers_fini(team); 1692 team_queue_override_fini(team); 1693 netdev_change_features(dev); 1694 } 1695 1696 static void team_destructor(struct net_device *dev) 1697 { 1698 struct team *team = netdev_priv(dev); 1699 1700 free_percpu(team->pcpu_stats); 1701 } 1702 1703 static int team_open(struct net_device *dev) 1704 { 1705 return 0; 1706 } 1707 1708 static int team_close(struct net_device *dev) 1709 { 1710 struct team *team = netdev_priv(dev); 1711 struct team_port *port; 1712 1713 list_for_each_entry(port, &team->port_list, list) { 1714 dev_uc_unsync(port->dev, dev); 1715 dev_mc_unsync(port->dev, dev); 1716 } 1717 1718 return 0; 1719 } 1720 1721 /* 1722 * note: already called with rcu_read_lock 1723 */ 1724 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev) 1725 { 1726 struct team *team = netdev_priv(dev); 1727 bool tx_success; 1728 unsigned int len = skb->len; 1729 1730 tx_success = team_queue_override_transmit(team, skb); 1731 if (!tx_success) 1732 tx_success = team->ops.transmit(team, skb); 1733 if (tx_success) { 1734 struct team_pcpu_stats *pcpu_stats; 1735 1736 pcpu_stats = this_cpu_ptr(team->pcpu_stats); 1737 u64_stats_update_begin(&pcpu_stats->syncp); 1738 u64_stats_inc(&pcpu_stats->tx_packets); 1739 u64_stats_add(&pcpu_stats->tx_bytes, len); 1740 u64_stats_update_end(&pcpu_stats->syncp); 1741 } else { 1742 this_cpu_inc(team->pcpu_stats->tx_dropped); 1743 } 1744 1745 return NETDEV_TX_OK; 1746 } 1747 1748 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb, 1749 struct net_device *sb_dev) 1750 { 1751 /* 1752 * This helper function exists to help dev_pick_tx get the correct 1753 * destination queue. Using a helper function skips a call to 1754 * skb_tx_hash and will put the skbs in the queue we expect on their 1755 * way down to the team driver. 1756 */ 1757 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0; 1758 1759 /* 1760 * Save the original txq to restore before passing to the driver 1761 */ 1762 qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping; 1763 1764 if (unlikely(txq >= dev->real_num_tx_queues)) { 1765 do { 1766 txq -= dev->real_num_tx_queues; 1767 } while (txq >= dev->real_num_tx_queues); 1768 } 1769 return txq; 1770 } 1771 1772 static void team_change_rx_flags(struct net_device *dev, int change) 1773 { 1774 struct team *team = netdev_priv(dev); 1775 struct team_port *port; 1776 int inc; 1777 1778 ASSERT_RTNL(); 1779 1780 list_for_each_entry(port, &team->port_list, list) { 1781 if (change & IFF_PROMISC) { 1782 inc = dev->flags & IFF_PROMISC ? 1 : -1; 1783 dev_set_promiscuity(port->dev, inc); 1784 } 1785 if (change & IFF_ALLMULTI) { 1786 inc = dev->flags & IFF_ALLMULTI ? 1 : -1; 1787 dev_set_allmulti(port->dev, inc); 1788 } 1789 } 1790 } 1791 1792 static void team_set_rx_mode(struct net_device *dev) 1793 { 1794 struct team *team = netdev_priv(dev); 1795 struct team_port *port; 1796 1797 rcu_read_lock(); 1798 list_for_each_entry_rcu(port, &team->port_list, list) { 1799 dev_uc_sync_multiple(port->dev, dev); 1800 dev_mc_sync_multiple(port->dev, dev); 1801 } 1802 rcu_read_unlock(); 1803 } 1804 1805 static int team_set_mac_address(struct net_device *dev, void *p) 1806 { 1807 struct sockaddr *addr = p; 1808 struct team *team = netdev_priv(dev); 1809 struct team_port *port; 1810 1811 ASSERT_RTNL(); 1812 1813 if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data)) 1814 return -EADDRNOTAVAIL; 1815 dev_addr_set(dev, addr->sa_data); 1816 list_for_each_entry(port, &team->port_list, list) 1817 if (team->ops.port_change_dev_addr) 1818 team->ops.port_change_dev_addr(team, port); 1819 return 0; 1820 } 1821 1822 static int team_change_mtu(struct net_device *dev, int new_mtu) 1823 { 1824 struct team *team = netdev_priv(dev); 1825 struct team_port *port; 1826 int err; 1827 1828 ASSERT_RTNL(); 1829 1830 team->port_mtu_change_allowed = true; 1831 list_for_each_entry(port, &team->port_list, list) { 1832 err = dev_set_mtu(port->dev, new_mtu); 1833 if (err) { 1834 netdev_err(dev, "Device %s failed to change mtu", 1835 port->dev->name); 1836 goto unwind; 1837 } 1838 } 1839 team->port_mtu_change_allowed = false; 1840 1841 WRITE_ONCE(dev->mtu, new_mtu); 1842 1843 return 0; 1844 1845 unwind: 1846 list_for_each_entry_continue_reverse(port, &team->port_list, list) 1847 dev_set_mtu(port->dev, dev->mtu); 1848 team->port_mtu_change_allowed = false; 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 ASSERT_RTNL(); 1899 1900 list_for_each_entry(port, &team->port_list, list) { 1901 err = vlan_vid_add(port->dev, proto, vid); 1902 if (err) 1903 goto unwind; 1904 } 1905 1906 return 0; 1907 1908 unwind: 1909 list_for_each_entry_continue_reverse(port, &team->port_list, list) 1910 vlan_vid_del(port->dev, proto, vid); 1911 1912 return err; 1913 } 1914 1915 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid) 1916 { 1917 struct team *team = netdev_priv(dev); 1918 struct team_port *port; 1919 1920 ASSERT_RTNL(); 1921 1922 list_for_each_entry(port, &team->port_list, list) 1923 vlan_vid_del(port->dev, proto, vid); 1924 1925 return 0; 1926 } 1927 1928 #ifdef CONFIG_NET_POLL_CONTROLLER 1929 static void team_poll_controller(struct net_device *dev) 1930 { 1931 } 1932 1933 static void __team_netpoll_cleanup(struct team *team) 1934 { 1935 struct team_port *port; 1936 1937 list_for_each_entry(port, &team->port_list, list) 1938 team_port_disable_netpoll(port); 1939 } 1940 1941 static void team_netpoll_cleanup(struct net_device *dev) 1942 { 1943 struct team *team = netdev_priv(dev); 1944 1945 ASSERT_RTNL(); 1946 1947 __team_netpoll_cleanup(team); 1948 } 1949 1950 static int team_netpoll_setup(struct net_device *dev) 1951 { 1952 struct team *team = netdev_priv(dev); 1953 struct team_port *port; 1954 int err = 0; 1955 1956 ASSERT_RTNL(); 1957 1958 list_for_each_entry(port, &team->port_list, list) { 1959 err = __team_port_enable_netpoll(port); 1960 if (err) { 1961 __team_netpoll_cleanup(team); 1962 break; 1963 } 1964 } 1965 return err; 1966 } 1967 #endif 1968 1969 static int team_add_slave(struct net_device *dev, struct net_device *port_dev, 1970 struct netlink_ext_ack *extack) 1971 { 1972 struct team *team = netdev_priv(dev); 1973 int err; 1974 1975 ASSERT_RTNL(); 1976 1977 err = team_port_add(team, port_dev, extack); 1978 1979 if (!err) 1980 netdev_change_features(dev); 1981 1982 return err; 1983 } 1984 1985 static int team_del_slave(struct net_device *dev, struct net_device *port_dev) 1986 { 1987 struct team *team = netdev_priv(dev); 1988 int err; 1989 1990 ASSERT_RTNL(); 1991 1992 err = team_port_del(team, port_dev); 1993 1994 if (err) 1995 return err; 1996 1997 netdev_change_features(dev); 1998 1999 return err; 2000 } 2001 2002 static netdev_features_t team_fix_features(struct net_device *dev, 2003 netdev_features_t features) 2004 { 2005 struct team_port *port; 2006 struct team *team = netdev_priv(dev); 2007 netdev_features_t mask; 2008 2009 mask = features; 2010 features = netdev_base_features(features); 2011 2012 rcu_read_lock(); 2013 list_for_each_entry_rcu(port, &team->port_list, list) { 2014 features = netdev_increment_features(features, 2015 port->dev->features, 2016 mask); 2017 } 2018 rcu_read_unlock(); 2019 2020 features = netdev_add_tso_features(features, mask); 2021 2022 return features; 2023 } 2024 2025 static int team_change_carrier(struct net_device *dev, bool new_carrier) 2026 { 2027 struct team *team = netdev_priv(dev); 2028 2029 team->user_carrier_enabled = true; 2030 2031 if (new_carrier) 2032 netif_carrier_on(dev); 2033 else 2034 netif_carrier_off(dev); 2035 return 0; 2036 } 2037 2038 static const struct net_device_ops team_netdev_ops = { 2039 .ndo_init = team_init, 2040 .ndo_uninit = team_uninit, 2041 .ndo_open = team_open, 2042 .ndo_stop = team_close, 2043 .ndo_start_xmit = team_xmit, 2044 .ndo_select_queue = team_select_queue, 2045 .ndo_change_rx_flags = team_change_rx_flags, 2046 .ndo_set_rx_mode = team_set_rx_mode, 2047 .ndo_set_mac_address = team_set_mac_address, 2048 .ndo_change_mtu = team_change_mtu, 2049 .ndo_get_stats64 = team_get_stats64, 2050 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid, 2051 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid, 2052 #ifdef CONFIG_NET_POLL_CONTROLLER 2053 .ndo_poll_controller = team_poll_controller, 2054 .ndo_netpoll_setup = team_netpoll_setup, 2055 .ndo_netpoll_cleanup = team_netpoll_cleanup, 2056 #endif 2057 .ndo_add_slave = team_add_slave, 2058 .ndo_del_slave = team_del_slave, 2059 .ndo_fix_features = team_fix_features, 2060 .ndo_change_carrier = team_change_carrier, 2061 .ndo_features_check = passthru_features_check, 2062 }; 2063 2064 /*********************** 2065 * ethtool interface 2066 ***********************/ 2067 2068 static void team_ethtool_get_drvinfo(struct net_device *dev, 2069 struct ethtool_drvinfo *drvinfo) 2070 { 2071 strscpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver)); 2072 } 2073 2074 static int team_ethtool_get_link_ksettings(struct net_device *dev, 2075 struct ethtool_link_ksettings *cmd) 2076 { 2077 struct team *team= netdev_priv(dev); 2078 unsigned long speed = 0; 2079 struct team_port *port; 2080 2081 cmd->base.duplex = DUPLEX_UNKNOWN; 2082 cmd->base.port = PORT_OTHER; 2083 2084 rcu_read_lock(); 2085 list_for_each_entry_rcu(port, &team->port_list, list) { 2086 if (team_port_txable(port)) { 2087 if (port->state.speed != SPEED_UNKNOWN) 2088 speed += port->state.speed; 2089 if (cmd->base.duplex == DUPLEX_UNKNOWN && 2090 port->state.duplex != DUPLEX_UNKNOWN) 2091 cmd->base.duplex = port->state.duplex; 2092 } 2093 } 2094 rcu_read_unlock(); 2095 2096 cmd->base.speed = speed ? : SPEED_UNKNOWN; 2097 2098 return 0; 2099 } 2100 2101 static const struct ethtool_ops team_ethtool_ops = { 2102 .get_drvinfo = team_ethtool_get_drvinfo, 2103 .get_link = ethtool_op_get_link, 2104 .get_link_ksettings = team_ethtool_get_link_ksettings, 2105 }; 2106 2107 /*********************** 2108 * rt netlink interface 2109 ***********************/ 2110 2111 static void team_setup_by_port(struct net_device *dev, 2112 struct net_device *port_dev) 2113 { 2114 struct team *team = netdev_priv(dev); 2115 2116 if (port_dev->type == ARPHRD_ETHER) 2117 dev->header_ops = team->header_ops_cache; 2118 else 2119 dev->header_ops = port_dev->header_ops; 2120 dev->type = port_dev->type; 2121 dev->hard_header_len = port_dev->hard_header_len; 2122 dev->needed_headroom = port_dev->needed_headroom; 2123 dev->addr_len = port_dev->addr_len; 2124 dev->mtu = port_dev->mtu; 2125 memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len); 2126 eth_hw_addr_inherit(dev, port_dev); 2127 2128 if (port_dev->flags & IFF_POINTOPOINT) { 2129 dev->flags &= ~(IFF_BROADCAST | IFF_MULTICAST); 2130 dev->flags |= (IFF_POINTOPOINT | IFF_NOARP); 2131 } else if ((port_dev->flags & (IFF_BROADCAST | IFF_MULTICAST)) == 2132 (IFF_BROADCAST | IFF_MULTICAST)) { 2133 dev->flags |= (IFF_BROADCAST | IFF_MULTICAST); 2134 dev->flags &= ~(IFF_POINTOPOINT | IFF_NOARP); 2135 } 2136 } 2137 2138 static int team_dev_type_check_change(struct net_device *dev, 2139 struct net_device *port_dev) 2140 { 2141 struct team *team = netdev_priv(dev); 2142 char *portname = port_dev->name; 2143 int err; 2144 2145 if (dev->type == port_dev->type) 2146 return 0; 2147 if (!list_empty(&team->port_list)) { 2148 netdev_err(dev, "Device %s is of different type\n", portname); 2149 return -EBUSY; 2150 } 2151 err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev); 2152 err = notifier_to_errno(err); 2153 if (err) { 2154 netdev_err(dev, "Refused to change device type\n"); 2155 return err; 2156 } 2157 dev_uc_flush(dev); 2158 dev_mc_flush(dev); 2159 team_setup_by_port(dev, port_dev); 2160 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev); 2161 return 0; 2162 } 2163 2164 static void team_setup(struct net_device *dev) 2165 { 2166 struct team *team = netdev_priv(dev); 2167 2168 ether_setup(dev); 2169 dev->max_mtu = ETH_MAX_MTU; 2170 team->header_ops_cache = dev->header_ops; 2171 2172 dev->netdev_ops = &team_netdev_ops; 2173 dev->ethtool_ops = &team_ethtool_ops; 2174 dev->needs_free_netdev = true; 2175 dev->priv_destructor = team_destructor; 2176 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); 2177 dev->priv_flags |= IFF_NO_QUEUE; 2178 dev->priv_flags |= IFF_TEAM; 2179 2180 /* 2181 * Indicate we support unicast address filtering. That way core won't 2182 * bring us to promisc mode in case a unicast addr is added. 2183 * Let this up to underlay drivers. 2184 */ 2185 dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE; 2186 dev->lltx = true; 2187 2188 /* Don't allow team devices to change network namespaces. */ 2189 dev->netns_immutable = true; 2190 2191 dev->features |= NETIF_F_GRO; 2192 2193 dev->hw_features = TEAM_VLAN_FEATURES | 2194 NETIF_F_HW_VLAN_CTAG_RX | 2195 NETIF_F_HW_VLAN_CTAG_FILTER | 2196 NETIF_F_HW_VLAN_STAG_RX | 2197 NETIF_F_HW_VLAN_STAG_FILTER; 2198 2199 dev->hw_features |= NETIF_F_GSO_ENCAP_ALL; 2200 dev->features |= dev->hw_features; 2201 dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; 2202 } 2203 2204 static int team_newlink(struct net_device *dev, 2205 struct rtnl_newlink_params *params, 2206 struct netlink_ext_ack *extack) 2207 { 2208 struct nlattr **tb = params->tb; 2209 2210 if (tb[IFLA_ADDRESS] == NULL) 2211 eth_hw_addr_random(dev); 2212 2213 return register_netdevice(dev); 2214 } 2215 2216 static int team_validate(struct nlattr *tb[], struct nlattr *data[], 2217 struct netlink_ext_ack *extack) 2218 { 2219 if (tb[IFLA_ADDRESS]) { 2220 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) 2221 return -EINVAL; 2222 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) 2223 return -EADDRNOTAVAIL; 2224 } 2225 return 0; 2226 } 2227 2228 static unsigned int team_get_num_tx_queues(void) 2229 { 2230 return TEAM_DEFAULT_NUM_TX_QUEUES; 2231 } 2232 2233 static unsigned int team_get_num_rx_queues(void) 2234 { 2235 return TEAM_DEFAULT_NUM_RX_QUEUES; 2236 } 2237 2238 static struct rtnl_link_ops team_link_ops __read_mostly = { 2239 .kind = DRV_NAME, 2240 .priv_size = sizeof(struct team), 2241 .setup = team_setup, 2242 .newlink = team_newlink, 2243 .validate = team_validate, 2244 .get_num_tx_queues = team_get_num_tx_queues, 2245 .get_num_rx_queues = team_get_num_rx_queues, 2246 }; 2247 2248 2249 /*********************************** 2250 * Generic netlink custom interface 2251 ***********************************/ 2252 2253 static struct genl_family team_nl_family; 2254 2255 int team_nl_noop_doit(struct sk_buff *skb, struct genl_info *info) 2256 { 2257 struct sk_buff *msg; 2258 void *hdr; 2259 int err; 2260 2261 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 2262 if (!msg) 2263 return -ENOMEM; 2264 2265 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq, 2266 &team_nl_family, 0, TEAM_CMD_NOOP); 2267 if (!hdr) { 2268 err = -EMSGSIZE; 2269 goto err_msg_put; 2270 } 2271 2272 genlmsg_end(msg, hdr); 2273 2274 return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid); 2275 2276 err_msg_put: 2277 nlmsg_free(msg); 2278 2279 return err; 2280 } 2281 2282 /* 2283 * Netlink cmd functions should be locked by following two functions. 2284 * Since dev gets held here, that ensures dev won't disappear in between. 2285 */ 2286 static struct team *team_nl_team_get(struct genl_info *info) 2287 { 2288 struct net *net = genl_info_net(info); 2289 struct net_device *dev; 2290 int ifindex; 2291 2292 ASSERT_RTNL(); 2293 2294 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX]) 2295 return NULL; 2296 2297 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]); 2298 dev = dev_get_by_index(net, ifindex); 2299 if (!dev || dev->netdev_ops != &team_netdev_ops) { 2300 dev_put(dev); 2301 return NULL; 2302 } 2303 2304 return netdev_priv(dev); 2305 } 2306 2307 static void team_nl_team_put(struct team *team) 2308 { 2309 dev_put(team->dev); 2310 } 2311 2312 typedef int team_nl_send_func_t(struct sk_buff *skb, 2313 struct team *team, u32 portid); 2314 2315 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid) 2316 { 2317 return genlmsg_unicast(dev_net(team->dev), skb, portid); 2318 } 2319 2320 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team, 2321 struct team_option_inst *opt_inst) 2322 { 2323 struct nlattr *option_item; 2324 struct team_option *option = opt_inst->option; 2325 struct team_option_inst_info *opt_inst_info = &opt_inst->info; 2326 struct team_gsetter_ctx ctx; 2327 int err; 2328 2329 ctx.info = opt_inst_info; 2330 err = team_option_get(team, opt_inst, &ctx); 2331 if (err) 2332 return err; 2333 2334 option_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_OPTION); 2335 if (!option_item) 2336 return -EMSGSIZE; 2337 2338 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name)) 2339 goto nest_cancel; 2340 if (opt_inst_info->port && 2341 nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX, 2342 opt_inst_info->port->dev->ifindex)) 2343 goto nest_cancel; 2344 if (opt_inst->option->array_size && 2345 nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX, 2346 opt_inst_info->array_index)) 2347 goto nest_cancel; 2348 2349 switch (option->type) { 2350 case TEAM_OPTION_TYPE_U32: 2351 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32)) 2352 goto nest_cancel; 2353 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val)) 2354 goto nest_cancel; 2355 break; 2356 case TEAM_OPTION_TYPE_STRING: 2357 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING)) 2358 goto nest_cancel; 2359 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA, 2360 ctx.data.str_val)) 2361 goto nest_cancel; 2362 break; 2363 case TEAM_OPTION_TYPE_BINARY: 2364 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY)) 2365 goto nest_cancel; 2366 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len, 2367 ctx.data.bin_val.ptr)) 2368 goto nest_cancel; 2369 break; 2370 case TEAM_OPTION_TYPE_BOOL: 2371 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG)) 2372 goto nest_cancel; 2373 if (ctx.data.bool_val && 2374 nla_put_flag(skb, TEAM_ATTR_OPTION_DATA)) 2375 goto nest_cancel; 2376 break; 2377 case TEAM_OPTION_TYPE_S32: 2378 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32)) 2379 goto nest_cancel; 2380 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val)) 2381 goto nest_cancel; 2382 break; 2383 default: 2384 BUG(); 2385 } 2386 if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED)) 2387 goto nest_cancel; 2388 if (opt_inst->changed) { 2389 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED)) 2390 goto nest_cancel; 2391 opt_inst->changed = false; 2392 } 2393 nla_nest_end(skb, option_item); 2394 return 0; 2395 2396 nest_cancel: 2397 nla_nest_cancel(skb, option_item); 2398 return -EMSGSIZE; 2399 } 2400 2401 static int __send_and_alloc_skb(struct sk_buff **pskb, 2402 struct team *team, u32 portid, 2403 team_nl_send_func_t *send_func) 2404 { 2405 int err; 2406 2407 if (*pskb) { 2408 err = send_func(*pskb, team, portid); 2409 if (err) 2410 return err; 2411 } 2412 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL); 2413 if (!*pskb) 2414 return -ENOMEM; 2415 return 0; 2416 } 2417 2418 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq, 2419 int flags, team_nl_send_func_t *send_func, 2420 struct list_head *sel_opt_inst_list) 2421 { 2422 struct nlattr *option_list; 2423 struct nlmsghdr *nlh; 2424 void *hdr; 2425 struct team_option_inst *opt_inst; 2426 int err; 2427 struct sk_buff *skb = NULL; 2428 bool incomplete; 2429 int i; 2430 2431 opt_inst = list_first_entry(sel_opt_inst_list, 2432 struct team_option_inst, tmp_list); 2433 2434 start_again: 2435 err = __send_and_alloc_skb(&skb, team, portid, send_func); 2436 if (err) 2437 return err; 2438 2439 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI, 2440 TEAM_CMD_OPTIONS_GET); 2441 if (!hdr) { 2442 nlmsg_free(skb); 2443 return -EMSGSIZE; 2444 } 2445 2446 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex)) 2447 goto nla_put_failure; 2448 option_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_OPTION); 2449 if (!option_list) 2450 goto nla_put_failure; 2451 2452 i = 0; 2453 incomplete = false; 2454 list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) { 2455 err = team_nl_fill_one_option_get(skb, team, opt_inst); 2456 if (err) { 2457 if (err == -EMSGSIZE) { 2458 if (!i) 2459 goto errout; 2460 incomplete = true; 2461 break; 2462 } 2463 goto errout; 2464 } 2465 i++; 2466 } 2467 2468 nla_nest_end(skb, option_list); 2469 genlmsg_end(skb, hdr); 2470 if (incomplete) 2471 goto start_again; 2472 2473 send_done: 2474 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI); 2475 if (!nlh) { 2476 err = __send_and_alloc_skb(&skb, team, portid, send_func); 2477 if (err) 2478 return err; 2479 goto send_done; 2480 } 2481 2482 return send_func(skb, team, portid); 2483 2484 nla_put_failure: 2485 err = -EMSGSIZE; 2486 errout: 2487 nlmsg_free(skb); 2488 return err; 2489 } 2490 2491 int team_nl_options_get_doit(struct sk_buff *skb, struct genl_info *info) 2492 { 2493 struct team *team; 2494 struct team_option_inst *opt_inst; 2495 int err; 2496 LIST_HEAD(sel_opt_inst_list); 2497 2498 rtnl_lock(); 2499 2500 team = team_nl_team_get(info); 2501 if (!team) { 2502 err = -EINVAL; 2503 goto rtnl_unlock; 2504 } 2505 2506 list_for_each_entry(opt_inst, &team->option_inst_list, list) 2507 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list); 2508 err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq, 2509 NLM_F_ACK, team_nl_send_unicast, 2510 &sel_opt_inst_list); 2511 2512 team_nl_team_put(team); 2513 2514 rtnl_unlock: 2515 rtnl_unlock(); 2516 2517 return err; 2518 } 2519 2520 static int team_nl_send_event_options_get(struct team *team, 2521 struct list_head *sel_opt_inst_list); 2522 2523 int team_nl_options_set_doit(struct sk_buff *skb, struct genl_info *info) 2524 { 2525 struct team *team; 2526 int err = 0; 2527 int i; 2528 struct nlattr *nl_option; 2529 2530 rtnl_lock(); 2531 2532 team = team_nl_team_get(info); 2533 if (!team) { 2534 err = -EINVAL; 2535 goto rtnl_unlock; 2536 } 2537 2538 err = -EINVAL; 2539 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) { 2540 err = -EINVAL; 2541 goto team_put; 2542 } 2543 2544 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) { 2545 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1]; 2546 struct nlattr *attr; 2547 struct nlattr *attr_data; 2548 LIST_HEAD(opt_inst_list); 2549 enum team_option_type opt_type; 2550 int opt_port_ifindex = 0; /* != 0 for per-port options */ 2551 u32 opt_array_index = 0; 2552 bool opt_is_array = false; 2553 struct team_option_inst *opt_inst; 2554 char *opt_name; 2555 bool opt_found = false; 2556 2557 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) { 2558 err = -EINVAL; 2559 goto team_put; 2560 } 2561 err = nla_parse_nested_deprecated(opt_attrs, 2562 TEAM_ATTR_OPTION_MAX, 2563 nl_option, 2564 team_attr_option_nl_policy, 2565 info->extack); 2566 if (err) 2567 goto team_put; 2568 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] || 2569 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) { 2570 err = -EINVAL; 2571 goto team_put; 2572 } 2573 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) { 2574 case NLA_U32: 2575 opt_type = TEAM_OPTION_TYPE_U32; 2576 break; 2577 case NLA_STRING: 2578 opt_type = TEAM_OPTION_TYPE_STRING; 2579 break; 2580 case NLA_BINARY: 2581 opt_type = TEAM_OPTION_TYPE_BINARY; 2582 break; 2583 case NLA_FLAG: 2584 opt_type = TEAM_OPTION_TYPE_BOOL; 2585 break; 2586 case NLA_S32: 2587 opt_type = TEAM_OPTION_TYPE_S32; 2588 break; 2589 default: 2590 goto team_put; 2591 } 2592 2593 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA]; 2594 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) { 2595 err = -EINVAL; 2596 goto team_put; 2597 } 2598 2599 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]); 2600 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX]; 2601 if (attr) 2602 opt_port_ifindex = nla_get_u32(attr); 2603 2604 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX]; 2605 if (attr) { 2606 opt_is_array = true; 2607 opt_array_index = nla_get_u32(attr); 2608 } 2609 2610 list_for_each_entry(opt_inst, &team->option_inst_list, list) { 2611 struct team_option *option = opt_inst->option; 2612 struct team_gsetter_ctx ctx; 2613 struct team_option_inst_info *opt_inst_info; 2614 int tmp_ifindex; 2615 2616 opt_inst_info = &opt_inst->info; 2617 tmp_ifindex = opt_inst_info->port ? 2618 opt_inst_info->port->dev->ifindex : 0; 2619 if (option->type != opt_type || 2620 strcmp(option->name, opt_name) || 2621 tmp_ifindex != opt_port_ifindex || 2622 (option->array_size && !opt_is_array) || 2623 opt_inst_info->array_index != opt_array_index) 2624 continue; 2625 opt_found = true; 2626 ctx.info = opt_inst_info; 2627 switch (opt_type) { 2628 case TEAM_OPTION_TYPE_U32: 2629 ctx.data.u32_val = nla_get_u32(attr_data); 2630 break; 2631 case TEAM_OPTION_TYPE_STRING: 2632 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN || 2633 !memchr(nla_data(attr_data), '\0', 2634 nla_len(attr_data))) { 2635 err = -EINVAL; 2636 goto team_put; 2637 } 2638 ctx.data.str_val = nla_data(attr_data); 2639 break; 2640 case TEAM_OPTION_TYPE_BINARY: 2641 ctx.data.bin_val.len = nla_len(attr_data); 2642 ctx.data.bin_val.ptr = nla_data(attr_data); 2643 break; 2644 case TEAM_OPTION_TYPE_BOOL: 2645 ctx.data.bool_val = attr_data ? true : false; 2646 break; 2647 case TEAM_OPTION_TYPE_S32: 2648 ctx.data.s32_val = nla_get_s32(attr_data); 2649 break; 2650 default: 2651 BUG(); 2652 } 2653 err = team_option_set(team, opt_inst, &ctx); 2654 if (err) 2655 goto team_put; 2656 opt_inst->changed = true; 2657 list_add(&opt_inst->tmp_list, &opt_inst_list); 2658 } 2659 if (!opt_found) { 2660 err = -ENOENT; 2661 goto team_put; 2662 } 2663 2664 err = team_nl_send_event_options_get(team, &opt_inst_list); 2665 if (err) 2666 break; 2667 } 2668 2669 team_put: 2670 team_nl_team_put(team); 2671 rtnl_unlock: 2672 rtnl_unlock(); 2673 return err; 2674 } 2675 2676 static int team_nl_fill_one_port_get(struct sk_buff *skb, 2677 struct team_port *port) 2678 { 2679 struct nlattr *port_item; 2680 2681 port_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_PORT); 2682 if (!port_item) 2683 goto nest_cancel; 2684 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex)) 2685 goto nest_cancel; 2686 if (port->changed) { 2687 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED)) 2688 goto nest_cancel; 2689 port->changed = false; 2690 } 2691 if ((port->removed && 2692 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) || 2693 (port->state.linkup && 2694 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) || 2695 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) || 2696 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex)) 2697 goto nest_cancel; 2698 nla_nest_end(skb, port_item); 2699 return 0; 2700 2701 nest_cancel: 2702 nla_nest_cancel(skb, port_item); 2703 return -EMSGSIZE; 2704 } 2705 2706 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq, 2707 int flags, team_nl_send_func_t *send_func, 2708 struct team_port *one_port) 2709 { 2710 struct nlattr *port_list; 2711 struct nlmsghdr *nlh; 2712 void *hdr; 2713 struct team_port *port; 2714 int err; 2715 struct sk_buff *skb = NULL; 2716 bool incomplete; 2717 int i; 2718 2719 port = list_first_entry_or_null(&team->port_list, 2720 struct team_port, list); 2721 2722 start_again: 2723 err = __send_and_alloc_skb(&skb, team, portid, send_func); 2724 if (err) 2725 return err; 2726 2727 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI, 2728 TEAM_CMD_PORT_LIST_GET); 2729 if (!hdr) { 2730 nlmsg_free(skb); 2731 return -EMSGSIZE; 2732 } 2733 2734 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex)) 2735 goto nla_put_failure; 2736 port_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_PORT); 2737 if (!port_list) 2738 goto nla_put_failure; 2739 2740 i = 0; 2741 incomplete = false; 2742 2743 /* If one port is selected, called wants to send port list containing 2744 * only this port. Otherwise go through all listed ports and send all 2745 */ 2746 if (one_port) { 2747 err = team_nl_fill_one_port_get(skb, one_port); 2748 if (err) 2749 goto errout; 2750 } else if (port) { 2751 list_for_each_entry_from(port, &team->port_list, list) { 2752 err = team_nl_fill_one_port_get(skb, port); 2753 if (err) { 2754 if (err == -EMSGSIZE) { 2755 if (!i) 2756 goto errout; 2757 incomplete = true; 2758 break; 2759 } 2760 goto errout; 2761 } 2762 i++; 2763 } 2764 } 2765 2766 nla_nest_end(skb, port_list); 2767 genlmsg_end(skb, hdr); 2768 if (incomplete) 2769 goto start_again; 2770 2771 send_done: 2772 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI); 2773 if (!nlh) { 2774 err = __send_and_alloc_skb(&skb, team, portid, send_func); 2775 if (err) 2776 return err; 2777 goto send_done; 2778 } 2779 2780 return send_func(skb, team, portid); 2781 2782 nla_put_failure: 2783 err = -EMSGSIZE; 2784 errout: 2785 nlmsg_free(skb); 2786 return err; 2787 } 2788 2789 int team_nl_port_list_get_doit(struct sk_buff *skb, 2790 struct genl_info *info) 2791 { 2792 struct team *team; 2793 int err; 2794 2795 rtnl_lock(); 2796 2797 team = team_nl_team_get(info); 2798 if (!team) { 2799 err = -EINVAL; 2800 goto rtnl_unlock; 2801 } 2802 2803 err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq, 2804 NLM_F_ACK, team_nl_send_unicast, NULL); 2805 2806 team_nl_team_put(team); 2807 2808 rtnl_unlock: 2809 rtnl_unlock(); 2810 2811 return err; 2812 } 2813 2814 static const struct genl_multicast_group team_nl_mcgrps[] = { 2815 { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, }, 2816 }; 2817 2818 static struct genl_family team_nl_family __ro_after_init = { 2819 .name = TEAM_GENL_NAME, 2820 .version = TEAM_GENL_VERSION, 2821 .maxattr = ARRAY_SIZE(team_nl_policy) - 1, 2822 .policy = team_nl_policy, 2823 .netnsok = true, 2824 .module = THIS_MODULE, 2825 .small_ops = team_nl_ops, 2826 .n_small_ops = ARRAY_SIZE(team_nl_ops), 2827 .resv_start_op = TEAM_CMD_PORT_LIST_GET + 1, 2828 .mcgrps = team_nl_mcgrps, 2829 .n_mcgrps = ARRAY_SIZE(team_nl_mcgrps), 2830 }; 2831 2832 static int team_nl_send_multicast(struct sk_buff *skb, 2833 struct team *team, u32 portid) 2834 { 2835 return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev), 2836 skb, 0, 0, GFP_KERNEL); 2837 } 2838 2839 static int team_nl_send_event_options_get(struct team *team, 2840 struct list_head *sel_opt_inst_list) 2841 { 2842 return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast, 2843 sel_opt_inst_list); 2844 } 2845 2846 static int team_nl_send_event_port_get(struct team *team, 2847 struct team_port *port) 2848 { 2849 return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast, 2850 port); 2851 } 2852 2853 static int __init team_nl_init(void) 2854 { 2855 return genl_register_family(&team_nl_family); 2856 } 2857 2858 static void __exit team_nl_fini(void) 2859 { 2860 genl_unregister_family(&team_nl_family); 2861 } 2862 2863 2864 /****************** 2865 * Change checkers 2866 ******************/ 2867 2868 static void __team_options_change_check(struct team *team) 2869 { 2870 int err; 2871 struct team_option_inst *opt_inst; 2872 LIST_HEAD(sel_opt_inst_list); 2873 2874 list_for_each_entry(opt_inst, &team->option_inst_list, list) { 2875 if (opt_inst->changed) 2876 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list); 2877 } 2878 err = team_nl_send_event_options_get(team, &sel_opt_inst_list); 2879 if (err && err != -ESRCH) 2880 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n", 2881 err); 2882 } 2883 2884 /* rtnl lock is held */ 2885 2886 static void __team_port_change_send(struct team_port *port, bool linkup) 2887 { 2888 int err; 2889 2890 port->changed = true; 2891 port->state.linkup = linkup; 2892 team_refresh_port_linkup(port); 2893 if (linkup) { 2894 struct ethtool_link_ksettings ecmd; 2895 2896 err = __ethtool_get_link_ksettings(port->dev, &ecmd); 2897 if (!err) { 2898 port->state.speed = ecmd.base.speed; 2899 port->state.duplex = ecmd.base.duplex; 2900 goto send_event; 2901 } 2902 } 2903 port->state.speed = 0; 2904 port->state.duplex = 0; 2905 2906 send_event: 2907 err = team_nl_send_event_port_get(port->team, port); 2908 if (err && err != -ESRCH) 2909 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n", 2910 port->dev->name, err); 2911 2912 } 2913 2914 static void __team_carrier_check(struct team *team) 2915 { 2916 struct team_port *port; 2917 bool team_linkup; 2918 2919 if (team->user_carrier_enabled) 2920 return; 2921 2922 team_linkup = false; 2923 list_for_each_entry(port, &team->port_list, list) { 2924 if (port->linkup) { 2925 team_linkup = true; 2926 break; 2927 } 2928 } 2929 2930 if (team_linkup) 2931 netif_carrier_on(team->dev); 2932 else 2933 netif_carrier_off(team->dev); 2934 } 2935 2936 static void __team_port_change_check(struct team_port *port, bool linkup) 2937 { 2938 if (port->state.linkup != linkup) 2939 __team_port_change_send(port, linkup); 2940 __team_carrier_check(port->team); 2941 } 2942 2943 static void __team_port_change_port_added(struct team_port *port, bool linkup) 2944 { 2945 __team_port_change_send(port, linkup); 2946 __team_carrier_check(port->team); 2947 } 2948 2949 static void __team_port_change_port_removed(struct team_port *port) 2950 { 2951 port->removed = true; 2952 __team_port_change_send(port, false); 2953 __team_carrier_check(port->team); 2954 } 2955 2956 static void team_port_change_check(struct team_port *port, bool linkup) 2957 { 2958 ASSERT_RTNL(); 2959 2960 __team_port_change_check(port, linkup); 2961 } 2962 2963 2964 /************************************ 2965 * Net device notifier event handler 2966 ************************************/ 2967 2968 static int team_device_event(struct notifier_block *unused, 2969 unsigned long event, void *ptr) 2970 { 2971 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 2972 struct team_port *port; 2973 2974 port = team_port_get_rtnl(dev); 2975 if (!port) 2976 return NOTIFY_DONE; 2977 2978 switch (event) { 2979 case NETDEV_UP: 2980 if (netif_oper_up(dev)) 2981 team_port_change_check(port, true); 2982 break; 2983 case NETDEV_DOWN: 2984 team_port_change_check(port, false); 2985 break; 2986 case NETDEV_CHANGE: 2987 if (netif_running(port->dev)) 2988 team_port_change_check(port, 2989 !!netif_oper_up(port->dev)); 2990 break; 2991 case NETDEV_UNREGISTER: 2992 team_del_slave(port->team->dev, dev); 2993 break; 2994 case NETDEV_FEAT_CHANGE: 2995 if (!port->team->notifier_ctx) { 2996 port->team->notifier_ctx = true; 2997 team_compute_features(port->team); 2998 port->team->notifier_ctx = false; 2999 } 3000 break; 3001 case NETDEV_PRECHANGEMTU: 3002 /* Forbid to change mtu of underlaying device */ 3003 if (!port->team->port_mtu_change_allowed) 3004 return NOTIFY_BAD; 3005 break; 3006 case NETDEV_PRE_TYPE_CHANGE: 3007 /* Forbid to change type of underlaying device */ 3008 return NOTIFY_BAD; 3009 case NETDEV_RESEND_IGMP: 3010 /* Propagate to master device */ 3011 call_netdevice_notifiers(event, port->team->dev); 3012 break; 3013 } 3014 return NOTIFY_DONE; 3015 } 3016 3017 static struct notifier_block team_notifier_block __read_mostly = { 3018 .notifier_call = team_device_event, 3019 }; 3020 3021 3022 /*********************** 3023 * Module init and exit 3024 ***********************/ 3025 3026 static int __init team_module_init(void) 3027 { 3028 int err; 3029 3030 register_netdevice_notifier(&team_notifier_block); 3031 3032 err = rtnl_link_register(&team_link_ops); 3033 if (err) 3034 goto err_rtnl_reg; 3035 3036 err = team_nl_init(); 3037 if (err) 3038 goto err_nl_init; 3039 3040 return 0; 3041 3042 err_nl_init: 3043 rtnl_link_unregister(&team_link_ops); 3044 3045 err_rtnl_reg: 3046 unregister_netdevice_notifier(&team_notifier_block); 3047 3048 return err; 3049 } 3050 3051 static void __exit team_module_exit(void) 3052 { 3053 team_nl_fini(); 3054 rtnl_link_unregister(&team_link_ops); 3055 unregister_netdevice_notifier(&team_notifier_block); 3056 } 3057 3058 module_init(team_module_init); 3059 module_exit(team_module_exit); 3060 3061 MODULE_LICENSE("GPL v2"); 3062 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>"); 3063 MODULE_DESCRIPTION("Ethernet team device driver"); 3064 MODULE_ALIAS_RTNL_LINK(DRV_NAME); 3065