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, netdev_from_priv(team)->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_tx_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_obj(*opt_inst); 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 = kzalloc_objs(struct team_option *, option_count); 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_obj(*mitem); 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->tx_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->rx_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 = netdev_from_priv(team); 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, netdev_from_priv(team)); 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(netdev_from_priv(team))) 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, netdev_from_priv(team)); 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(netdev_from_priv(team))) 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_rx_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 = netdev_from_priv(team); 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 = netdev_from_priv(team)->num_tx_queues - 1; 778 unsigned int i; 779 780 if (!queue_cnt) 781 return 0; 782 listarr = kmalloc_objs(struct list_head, queue_cnt); 783 if (!listarr) 784 return -ENOMEM; 785 team->qom_lists = listarr; 786 for (i = 0; i < queue_cnt; i++) 787 INIT_LIST_HEAD(listarr++); 788 return 0; 789 } 790 791 static void team_queue_override_fini(struct team *team) 792 { 793 kfree(team->qom_lists); 794 } 795 796 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id) 797 { 798 return &team->qom_lists[queue_id - 1]; 799 } 800 801 /* 802 * note: already called with rcu_read_lock 803 */ 804 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb) 805 { 806 struct list_head *qom_list; 807 struct team_port *port; 808 809 if (!team->queue_override_enabled || !skb->queue_mapping) 810 return false; 811 qom_list = __team_get_qom_list(team, skb->queue_mapping); 812 list_for_each_entry_rcu(port, qom_list, qom_list) { 813 if (!team_dev_queue_xmit(team, port, skb)) 814 return true; 815 } 816 return false; 817 } 818 819 static void __team_queue_override_port_del(struct team *team, 820 struct team_port *port) 821 { 822 if (!port->queue_id) 823 return; 824 list_del_rcu(&port->qom_list); 825 } 826 827 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port, 828 struct team_port *cur) 829 { 830 if (port->priority < cur->priority) 831 return true; 832 if (port->priority > cur->priority) 833 return false; 834 if (port->tx_index < cur->tx_index) 835 return true; 836 return false; 837 } 838 839 static void __team_queue_override_port_add(struct team *team, 840 struct team_port *port) 841 { 842 struct team_port *cur; 843 struct list_head *qom_list; 844 struct list_head *node; 845 846 if (!port->queue_id) 847 return; 848 qom_list = __team_get_qom_list(team, port->queue_id); 849 node = qom_list; 850 list_for_each_entry(cur, qom_list, qom_list) { 851 if (team_queue_override_port_has_gt_prio_than(port, cur)) 852 break; 853 node = &cur->qom_list; 854 } 855 list_add_tail_rcu(&port->qom_list, node); 856 } 857 858 static void __team_queue_override_enabled_check(struct team *team) 859 { 860 struct team_port *port; 861 bool enabled = false; 862 863 list_for_each_entry(port, &team->port_list, list) { 864 if (port->queue_id) { 865 enabled = true; 866 break; 867 } 868 } 869 if (enabled == team->queue_override_enabled) 870 return; 871 netdev_dbg(netdev_from_priv(team), "%s queue override\n", 872 enabled ? "Enabling" : "Disabling"); 873 team->queue_override_enabled = enabled; 874 } 875 876 static void team_queue_override_port_prio_changed(struct team *team, 877 struct team_port *port) 878 { 879 if (!port->queue_id || !team_port_tx_enabled(port)) 880 return; 881 __team_queue_override_port_del(team, port); 882 __team_queue_override_port_add(team, port); 883 __team_queue_override_enabled_check(team); 884 } 885 886 static void team_queue_override_port_change_queue_id(struct team *team, 887 struct team_port *port, 888 u16 new_queue_id) 889 { 890 if (team_port_tx_enabled(port)) { 891 __team_queue_override_port_del(team, port); 892 port->queue_id = new_queue_id; 893 __team_queue_override_port_add(team, port); 894 __team_queue_override_enabled_check(team); 895 } else { 896 port->queue_id = new_queue_id; 897 } 898 } 899 900 static void team_queue_override_port_add(struct team *team, 901 struct team_port *port) 902 { 903 __team_queue_override_port_add(team, port); 904 __team_queue_override_enabled_check(team); 905 } 906 907 static void team_queue_override_port_del(struct team *team, 908 struct team_port *port) 909 { 910 __team_queue_override_port_del(team, port); 911 __team_queue_override_enabled_check(team); 912 } 913 914 915 /**************** 916 * Port handling 917 ****************/ 918 919 static bool team_port_find(const struct team *team, 920 const struct team_port *port) 921 { 922 struct team_port *cur; 923 924 list_for_each_entry(cur, &team->port_list, list) 925 if (cur == port) 926 return true; 927 return false; 928 } 929 930 static void __team_port_enable_rx(struct team *team, 931 struct team_port *port) 932 { 933 team->rx_en_port_count++; 934 WRITE_ONCE(port->rx_enabled, true); 935 } 936 937 static void __team_port_disable_rx(struct team *team, 938 struct team_port *port) 939 { 940 team->rx_en_port_count--; 941 WRITE_ONCE(port->rx_enabled, false); 942 } 943 944 static void team_port_enable_rx(struct team *team, 945 struct team_port *port) 946 { 947 if (team_port_rx_enabled(port)) 948 return; 949 950 __team_port_enable_rx(team, port); 951 team_adjust_ops(team); 952 team_notify_peers(team); 953 team_mcast_rejoin(team); 954 } 955 956 static void team_port_disable_rx(struct team *team, 957 struct team_port *port) 958 { 959 if (!team_port_rx_enabled(port)) 960 return; 961 962 __team_port_disable_rx(team, port); 963 team_adjust_ops(team); 964 } 965 966 /* 967 * Enable just TX on the port by adding to tx-enabled port hashlist and 968 * setting port->tx_index (Might be racy so reader could see incorrect 969 * ifindex when processing a flying packet, but that is not a problem). 970 * Write guarded by RTNL. 971 */ 972 static void __team_port_enable_tx(struct team *team, 973 struct team_port *port) 974 { 975 WRITE_ONCE(port->tx_index, team->tx_en_port_count); 976 WRITE_ONCE(team->tx_en_port_count, team->tx_en_port_count + 1); 977 hlist_add_head_rcu(&port->tx_hlist, 978 team_tx_port_index_hash(team, port->tx_index)); 979 } 980 981 static void team_port_enable_tx(struct team *team, 982 struct team_port *port) 983 { 984 if (team_port_tx_enabled(port)) 985 return; 986 987 __team_port_enable_tx(team, port); 988 team_adjust_ops(team); 989 team_queue_override_port_add(team, port); 990 991 /* Don't rejoin multicast, since this port might not be receiving. */ 992 team_notify_peers(team); 993 team_lower_state_changed(port); 994 } 995 996 static void __reconstruct_port_hlist(struct team *team, int rm_index) 997 { 998 struct hlist_head *tx_port_index_hash; 999 struct team_port *port; 1000 int i; 1001 1002 for (i = rm_index + 1; i < team->tx_en_port_count; i++) { 1003 port = team_get_port_by_tx_index(team, i); 1004 hlist_del_rcu(&port->tx_hlist); 1005 WRITE_ONCE(port->tx_index, port->tx_index - 1); 1006 tx_port_index_hash = team_tx_port_index_hash(team, 1007 port->tx_index); 1008 hlist_add_head_rcu(&port->tx_hlist, tx_port_index_hash); 1009 } 1010 } 1011 1012 static void __team_port_disable_tx(struct team *team, 1013 struct team_port *port) 1014 { 1015 if (team->ops.port_tx_disabled) 1016 team->ops.port_tx_disabled(team, port); 1017 1018 hlist_del_rcu(&port->tx_hlist); 1019 __reconstruct_port_hlist(team, port->tx_index); 1020 1021 WRITE_ONCE(port->tx_index, -1); 1022 WRITE_ONCE(team->tx_en_port_count, team->tx_en_port_count - 1); 1023 } 1024 1025 static void team_port_disable_tx(struct team *team, 1026 struct team_port *port) 1027 { 1028 if (!team_port_tx_enabled(port)) 1029 return; 1030 1031 __team_port_disable_tx(team, port); 1032 1033 team_queue_override_port_del(team, port); 1034 team_adjust_ops(team); 1035 team_lower_state_changed(port); 1036 } 1037 1038 /* 1039 * Enable TX AND RX on the port. 1040 */ 1041 static void team_port_enable(struct team *team, 1042 struct team_port *port) 1043 { 1044 bool rx_was_enabled; 1045 bool tx_was_enabled; 1046 1047 if (team_port_enabled(port)) 1048 return; 1049 1050 rx_was_enabled = team_port_rx_enabled(port); 1051 tx_was_enabled = team_port_tx_enabled(port); 1052 1053 if (!rx_was_enabled) 1054 __team_port_enable_rx(team, port); 1055 if (!tx_was_enabled) 1056 __team_port_enable_tx(team, port); 1057 1058 team_adjust_ops(team); 1059 if (!tx_was_enabled) 1060 team_queue_override_port_add(team, port); 1061 team_notify_peers(team); 1062 if (!rx_was_enabled) 1063 team_mcast_rejoin(team); 1064 if (!tx_was_enabled) 1065 team_lower_state_changed(port); 1066 } 1067 1068 static void team_port_disable(struct team *team, 1069 struct team_port *port) 1070 { 1071 bool rx_was_enabled = team_port_rx_enabled(port); 1072 bool tx_was_enabled = team_port_tx_enabled(port); 1073 1074 if (!tx_was_enabled && !rx_was_enabled) 1075 return; 1076 1077 if (tx_was_enabled) { 1078 __team_port_disable_tx(team, port); 1079 team_queue_override_port_del(team, port); 1080 } 1081 if (rx_was_enabled) 1082 __team_port_disable_rx(team, port); 1083 1084 team_adjust_ops(team); 1085 1086 if (tx_was_enabled) 1087 team_lower_state_changed(port); 1088 } 1089 1090 static int team_port_enter(struct team *team, struct team_port *port) 1091 { 1092 int err = 0; 1093 1094 dev_hold(netdev_from_priv(team)); 1095 if (team->ops.port_enter) { 1096 err = team->ops.port_enter(team, port); 1097 if (err) { 1098 netdev_err(netdev_from_priv(team), 1099 "Device %s failed to enter team mode\n", 1100 port->dev->name); 1101 goto err_port_enter; 1102 } 1103 } 1104 1105 return 0; 1106 1107 err_port_enter: 1108 dev_put(netdev_from_priv(team)); 1109 1110 return err; 1111 } 1112 1113 static void team_port_leave(struct team *team, struct team_port *port) 1114 { 1115 if (team->ops.port_leave) 1116 team->ops.port_leave(team, port); 1117 dev_put(netdev_from_priv(team)); 1118 } 1119 1120 #ifdef CONFIG_NET_POLL_CONTROLLER 1121 static int __team_port_enable_netpoll(struct team_port *port) 1122 { 1123 struct netpoll *np; 1124 int err; 1125 1126 np = kzalloc_obj(*np); 1127 if (!np) 1128 return -ENOMEM; 1129 1130 err = __netpoll_setup(np, port->dev); 1131 if (err) { 1132 kfree(np); 1133 return err; 1134 } 1135 port->np = np; 1136 return err; 1137 } 1138 1139 static int team_port_enable_netpoll(struct team_port *port) 1140 { 1141 if (!netdev_from_priv(port->team)->npinfo) 1142 return 0; 1143 1144 return __team_port_enable_netpoll(port); 1145 } 1146 1147 static void team_port_disable_netpoll(struct team_port *port) 1148 { 1149 struct netpoll *np = port->np; 1150 1151 if (!np) 1152 return; 1153 port->np = NULL; 1154 1155 __netpoll_free(np); 1156 } 1157 #else 1158 static int team_port_enable_netpoll(struct team_port *port) 1159 { 1160 return 0; 1161 } 1162 static void team_port_disable_netpoll(struct team_port *port) 1163 { 1164 } 1165 #endif 1166 1167 static int team_upper_dev_link(struct team *team, struct team_port *port, 1168 struct netlink_ext_ack *extack) 1169 { 1170 struct netdev_lag_upper_info lag_upper_info; 1171 int err; 1172 1173 lag_upper_info.tx_type = team->mode->lag_tx_type; 1174 lag_upper_info.hash_type = NETDEV_LAG_HASH_UNKNOWN; 1175 err = netdev_master_upper_dev_link(port->dev, netdev_from_priv(team), 1176 NULL, &lag_upper_info, extack); 1177 if (err) 1178 return err; 1179 port->dev->priv_flags |= IFF_TEAM_PORT; 1180 return 0; 1181 } 1182 1183 static void team_upper_dev_unlink(struct team *team, struct team_port *port) 1184 { 1185 netdev_upper_dev_unlink(port->dev, netdev_from_priv(team)); 1186 port->dev->priv_flags &= ~IFF_TEAM_PORT; 1187 } 1188 1189 static void __team_port_change_port_added(struct team_port *port, bool linkup); 1190 static int team_dev_type_check_change(struct net_device *dev, 1191 struct net_device *port_dev); 1192 1193 static int team_port_add(struct team *team, struct net_device *port_dev, 1194 struct netlink_ext_ack *extack) 1195 { 1196 struct net_device *dev = netdev_from_priv(team); 1197 struct team_port *port; 1198 char *portname = port_dev->name; 1199 int err; 1200 1201 if (port_dev->flags & IFF_LOOPBACK) { 1202 NL_SET_ERR_MSG(extack, "Loopback device can't be added as a team port"); 1203 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n", 1204 portname); 1205 return -EINVAL; 1206 } 1207 1208 if (netif_is_team_port(port_dev)) { 1209 NL_SET_ERR_MSG(extack, "Device is already a port of a team device"); 1210 netdev_err(dev, "Device %s is already a port " 1211 "of a team device\n", portname); 1212 return -EBUSY; 1213 } 1214 1215 if (dev == port_dev) { 1216 NL_SET_ERR_MSG(extack, "Cannot enslave team device to itself"); 1217 netdev_err(dev, "Cannot enslave team device to itself\n"); 1218 return -EINVAL; 1219 } 1220 1221 if (netdev_has_upper_dev(dev, port_dev)) { 1222 NL_SET_ERR_MSG(extack, "Device is already an upper device of the team interface"); 1223 netdev_err(dev, "Device %s is already an upper device of the team interface\n", 1224 portname); 1225 return -EBUSY; 1226 } 1227 1228 if (netdev_has_upper_dev(port_dev, dev)) { 1229 NL_SET_ERR_MSG(extack, "Device is already a lower device of the team interface"); 1230 netdev_err(dev, "Device %s is already a lower device of the team interface\n", 1231 portname); 1232 return -EBUSY; 1233 } 1234 1235 if (port_dev->features & NETIF_F_VLAN_CHALLENGED && 1236 vlan_uses_dev(dev)) { 1237 NL_SET_ERR_MSG(extack, "Device is VLAN challenged and team device has VLAN set up"); 1238 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n", 1239 portname); 1240 return -EPERM; 1241 } 1242 1243 if (port_dev->flags & IFF_UP) { 1244 NL_SET_ERR_MSG(extack, "Device is up. Set it down before adding it as a team port"); 1245 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n", 1246 portname); 1247 return -EBUSY; 1248 } 1249 1250 port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size, 1251 GFP_KERNEL); 1252 if (!port) 1253 return -ENOMEM; 1254 1255 port->dev = port_dev; 1256 port->team = team; 1257 INIT_LIST_HEAD(&port->qom_list); 1258 1259 port->orig.mtu = port_dev->mtu; 1260 /* 1261 * MTU assignment will be handled in team_dev_type_check_change 1262 * if dev and port_dev are of different types 1263 */ 1264 if (dev->type == port_dev->type) { 1265 err = dev_set_mtu(port_dev, dev->mtu); 1266 if (err) { 1267 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err); 1268 goto err_set_mtu; 1269 } 1270 } 1271 1272 memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len); 1273 1274 err = team_port_enter(team, port); 1275 if (err) { 1276 netdev_err(dev, "Device %s failed to enter team mode\n", 1277 portname); 1278 goto err_port_enter; 1279 } 1280 1281 err = dev_open(port_dev, extack); 1282 if (err) { 1283 netdev_dbg(dev, "Device %s opening failed\n", 1284 portname); 1285 goto err_dev_open; 1286 } 1287 1288 err = vlan_vids_add_by_dev(port_dev, dev); 1289 if (err) { 1290 netdev_err(dev, "Failed to add vlan ids to device %s\n", 1291 portname); 1292 goto err_vids_add; 1293 } 1294 1295 err = team_port_enable_netpoll(port); 1296 if (err) { 1297 netdev_err(dev, "Failed to enable netpoll on device %s\n", 1298 portname); 1299 goto err_enable_netpoll; 1300 } 1301 1302 if (!(dev->features & NETIF_F_LRO)) 1303 dev_disable_lro(port_dev); 1304 1305 err = netdev_rx_handler_register(port_dev, team_handle_frame, 1306 port); 1307 if (err) { 1308 netdev_err(dev, "Device %s failed to register rx_handler\n", 1309 portname); 1310 goto err_handler_register; 1311 } 1312 1313 err = team_upper_dev_link(team, port, extack); 1314 if (err) { 1315 netdev_err(dev, "Device %s failed to set upper link\n", 1316 portname); 1317 goto err_set_upper_link; 1318 } 1319 1320 err = __team_option_inst_add_port(team, port); 1321 if (err) { 1322 netdev_err(dev, "Device %s failed to add per-port options\n", 1323 portname); 1324 goto err_option_port_add; 1325 } 1326 1327 /* set promiscuity level to new slave */ 1328 if (dev->flags & IFF_PROMISC) { 1329 err = dev_set_promiscuity(port_dev, 1); 1330 if (err) 1331 goto err_set_slave_promisc; 1332 } 1333 1334 /* set allmulti level to new slave */ 1335 if (dev->flags & IFF_ALLMULTI) { 1336 err = dev_set_allmulti(port_dev, 1); 1337 if (err) { 1338 if (dev->flags & IFF_PROMISC) 1339 dev_set_promiscuity(port_dev, -1); 1340 goto err_set_slave_allmulti; 1341 } 1342 } 1343 1344 err = team_dev_type_check_change(dev, port_dev); 1345 if (err) 1346 goto err_set_dev_type; 1347 1348 if (dev->flags & IFF_UP) { 1349 netif_addr_lock_bh(dev); 1350 dev_uc_sync_multiple(port_dev, dev); 1351 dev_mc_sync_multiple(port_dev, dev); 1352 netif_addr_unlock_bh(dev); 1353 } 1354 1355 WRITE_ONCE(port->tx_index, -1); 1356 list_add_tail_rcu(&port->list, &team->port_list); 1357 team_port_enable(team, port); 1358 netdev_compute_master_upper_features(dev, true); 1359 __team_port_change_port_added(port, !!netif_oper_up(port_dev)); 1360 __team_options_change_check(team); 1361 1362 netdev_info(dev, "Port device %s added\n", portname); 1363 1364 return 0; 1365 1366 err_set_dev_type: 1367 err_set_slave_allmulti: 1368 err_set_slave_promisc: 1369 __team_option_inst_del_port(team, port); 1370 1371 err_option_port_add: 1372 team_upper_dev_unlink(team, port); 1373 1374 err_set_upper_link: 1375 netdev_rx_handler_unregister(port_dev); 1376 1377 err_handler_register: 1378 team_port_disable_netpoll(port); 1379 1380 err_enable_netpoll: 1381 vlan_vids_del_by_dev(port_dev, dev); 1382 1383 err_vids_add: 1384 dev_close(port_dev); 1385 1386 err_dev_open: 1387 team_port_leave(team, port); 1388 team_port_set_orig_dev_addr(port); 1389 1390 err_port_enter: 1391 dev_set_mtu(port_dev, port->orig.mtu); 1392 1393 err_set_mtu: 1394 kfree(port); 1395 1396 return err; 1397 } 1398 1399 static void __team_port_change_port_removed(struct team_port *port); 1400 1401 static int team_port_del(struct team *team, struct net_device *port_dev, bool unregister) 1402 { 1403 struct net_device *dev = netdev_from_priv(team); 1404 struct team_port *port; 1405 char *portname = port_dev->name; 1406 1407 port = team_port_get_rtnl(port_dev); 1408 if (!port || !team_port_find(team, port)) { 1409 netdev_err(dev, "Device %s does not act as a port of this team\n", 1410 portname); 1411 return -ENOENT; 1412 } 1413 1414 team_port_disable(team, port); 1415 list_del_rcu(&port->list); 1416 1417 if (dev->flags & IFF_PROMISC) 1418 dev_set_promiscuity(port_dev, -1); 1419 if (dev->flags & IFF_ALLMULTI) 1420 dev_set_allmulti(port_dev, -1); 1421 1422 team_upper_dev_unlink(team, port); 1423 netdev_rx_handler_unregister(port_dev); 1424 team_port_disable_netpoll(port); 1425 vlan_vids_del_by_dev(port_dev, dev); 1426 if (dev->flags & IFF_UP) { 1427 dev_uc_unsync(port_dev, dev); 1428 dev_mc_unsync(port_dev, dev); 1429 } 1430 dev_close(port_dev); 1431 team_port_leave(team, port); 1432 1433 __team_option_inst_mark_removed_port(team, port); 1434 __team_options_change_check(team); 1435 __team_option_inst_del_port(team, port); 1436 __team_port_change_port_removed(port); 1437 1438 team_port_set_orig_dev_addr(port); 1439 if (unregister) { 1440 netdev_lock_ops(port_dev); 1441 __netif_set_mtu(port_dev, port->orig.mtu); 1442 netdev_unlock_ops(port_dev); 1443 } else { 1444 dev_set_mtu(port_dev, port->orig.mtu); 1445 } 1446 kfree_rcu(port, rcu); 1447 netdev_info(dev, "Port device %s removed\n", portname); 1448 netdev_compute_master_upper_features(dev, true); 1449 1450 return 0; 1451 } 1452 1453 1454 /***************** 1455 * Net device ops 1456 *****************/ 1457 1458 static void team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx) 1459 { 1460 ctx->data.str_val = team->mode->kind; 1461 } 1462 1463 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx) 1464 { 1465 return team_change_mode(team, ctx->data.str_val); 1466 } 1467 1468 static void team_notify_peers_count_get(struct team *team, 1469 struct team_gsetter_ctx *ctx) 1470 { 1471 ctx->data.u32_val = team->notify_peers.count; 1472 } 1473 1474 static int team_notify_peers_count_set(struct team *team, 1475 struct team_gsetter_ctx *ctx) 1476 { 1477 team->notify_peers.count = ctx->data.u32_val; 1478 return 0; 1479 } 1480 1481 static void team_notify_peers_interval_get(struct team *team, 1482 struct team_gsetter_ctx *ctx) 1483 { 1484 ctx->data.u32_val = team->notify_peers.interval; 1485 } 1486 1487 static int team_notify_peers_interval_set(struct team *team, 1488 struct team_gsetter_ctx *ctx) 1489 { 1490 team->notify_peers.interval = ctx->data.u32_val; 1491 return 0; 1492 } 1493 1494 static void team_mcast_rejoin_count_get(struct team *team, 1495 struct team_gsetter_ctx *ctx) 1496 { 1497 ctx->data.u32_val = team->mcast_rejoin.count; 1498 } 1499 1500 static int team_mcast_rejoin_count_set(struct team *team, 1501 struct team_gsetter_ctx *ctx) 1502 { 1503 team->mcast_rejoin.count = ctx->data.u32_val; 1504 return 0; 1505 } 1506 1507 static void team_mcast_rejoin_interval_get(struct team *team, 1508 struct team_gsetter_ctx *ctx) 1509 { 1510 ctx->data.u32_val = team->mcast_rejoin.interval; 1511 } 1512 1513 static int team_mcast_rejoin_interval_set(struct team *team, 1514 struct team_gsetter_ctx *ctx) 1515 { 1516 team->mcast_rejoin.interval = ctx->data.u32_val; 1517 return 0; 1518 } 1519 1520 static void team_port_en_option_get(struct team *team, 1521 struct team_gsetter_ctx *ctx) 1522 { 1523 struct team_port *port = ctx->info->port; 1524 1525 ctx->data.bool_val = team_port_enabled(port); 1526 } 1527 1528 static int team_port_en_option_set(struct team *team, 1529 struct team_gsetter_ctx *ctx) 1530 { 1531 struct team_port *port = ctx->info->port; 1532 1533 if (ctx->data.bool_val) 1534 team_port_enable(team, port); 1535 else 1536 team_port_disable(team, port); 1537 return 0; 1538 } 1539 1540 static void team_port_rx_en_option_get(struct team *team, 1541 struct team_gsetter_ctx *ctx) 1542 { 1543 struct team_port *port = ctx->info->port; 1544 1545 ctx->data.bool_val = team_port_rx_enabled(port); 1546 } 1547 1548 static int team_port_rx_en_option_set(struct team *team, 1549 struct team_gsetter_ctx *ctx) 1550 { 1551 struct team_port *port = ctx->info->port; 1552 1553 if (ctx->data.bool_val) 1554 team_port_enable_rx(team, port); 1555 else 1556 team_port_disable_rx(team, port); 1557 return 0; 1558 } 1559 1560 static void team_port_tx_en_option_get(struct team *team, 1561 struct team_gsetter_ctx *ctx) 1562 { 1563 struct team_port *port = ctx->info->port; 1564 1565 ctx->data.bool_val = team_port_tx_enabled(port); 1566 } 1567 1568 static int team_port_tx_en_option_set(struct team *team, 1569 struct team_gsetter_ctx *ctx) 1570 { 1571 struct team_port *port = ctx->info->port; 1572 1573 if (ctx->data.bool_val) 1574 team_port_enable_tx(team, port); 1575 else 1576 team_port_disable_tx(team, port); 1577 return 0; 1578 } 1579 1580 static void team_user_linkup_option_get(struct team *team, 1581 struct team_gsetter_ctx *ctx) 1582 { 1583 struct team_port *port = ctx->info->port; 1584 1585 ctx->data.bool_val = port->user.linkup; 1586 } 1587 1588 static void __team_carrier_check(struct team *team); 1589 1590 static int team_user_linkup_option_set(struct team *team, 1591 struct team_gsetter_ctx *ctx) 1592 { 1593 struct team_port *port = ctx->info->port; 1594 1595 port->user.linkup = ctx->data.bool_val; 1596 team_refresh_port_linkup(port); 1597 __team_carrier_check(port->team); 1598 return 0; 1599 } 1600 1601 static void team_user_linkup_en_option_get(struct team *team, 1602 struct team_gsetter_ctx *ctx) 1603 { 1604 struct team_port *port = ctx->info->port; 1605 1606 ctx->data.bool_val = port->user.linkup_enabled; 1607 } 1608 1609 static int team_user_linkup_en_option_set(struct team *team, 1610 struct team_gsetter_ctx *ctx) 1611 { 1612 struct team_port *port = ctx->info->port; 1613 1614 port->user.linkup_enabled = ctx->data.bool_val; 1615 team_refresh_port_linkup(port); 1616 __team_carrier_check(port->team); 1617 return 0; 1618 } 1619 1620 static void team_priority_option_get(struct team *team, 1621 struct team_gsetter_ctx *ctx) 1622 { 1623 struct team_port *port = ctx->info->port; 1624 1625 ctx->data.s32_val = port->priority; 1626 } 1627 1628 static int team_priority_option_set(struct team *team, 1629 struct team_gsetter_ctx *ctx) 1630 { 1631 struct team_port *port = ctx->info->port; 1632 s32 priority = ctx->data.s32_val; 1633 1634 if (port->priority == priority) 1635 return 0; 1636 port->priority = priority; 1637 team_queue_override_port_prio_changed(team, port); 1638 return 0; 1639 } 1640 1641 static void team_queue_id_option_get(struct team *team, 1642 struct team_gsetter_ctx *ctx) 1643 { 1644 struct team_port *port = ctx->info->port; 1645 1646 ctx->data.u32_val = port->queue_id; 1647 } 1648 1649 static int team_queue_id_option_set(struct team *team, 1650 struct team_gsetter_ctx *ctx) 1651 { 1652 struct team_port *port = ctx->info->port; 1653 u16 new_queue_id = ctx->data.u32_val; 1654 1655 if (port->queue_id == new_queue_id) 1656 return 0; 1657 if (new_queue_id >= netdev_from_priv(team)->real_num_tx_queues) 1658 return -EINVAL; 1659 team_queue_override_port_change_queue_id(team, port, new_queue_id); 1660 return 0; 1661 } 1662 1663 static const struct team_option team_options[] = { 1664 { 1665 .name = "mode", 1666 .type = TEAM_OPTION_TYPE_STRING, 1667 .getter = team_mode_option_get, 1668 .setter = team_mode_option_set, 1669 }, 1670 { 1671 .name = "notify_peers_count", 1672 .type = TEAM_OPTION_TYPE_U32, 1673 .getter = team_notify_peers_count_get, 1674 .setter = team_notify_peers_count_set, 1675 }, 1676 { 1677 .name = "notify_peers_interval", 1678 .type = TEAM_OPTION_TYPE_U32, 1679 .getter = team_notify_peers_interval_get, 1680 .setter = team_notify_peers_interval_set, 1681 }, 1682 { 1683 .name = "mcast_rejoin_count", 1684 .type = TEAM_OPTION_TYPE_U32, 1685 .getter = team_mcast_rejoin_count_get, 1686 .setter = team_mcast_rejoin_count_set, 1687 }, 1688 { 1689 .name = "mcast_rejoin_interval", 1690 .type = TEAM_OPTION_TYPE_U32, 1691 .getter = team_mcast_rejoin_interval_get, 1692 .setter = team_mcast_rejoin_interval_set, 1693 }, 1694 { 1695 .name = "enabled", 1696 .type = TEAM_OPTION_TYPE_BOOL, 1697 .per_port = true, 1698 .getter = team_port_en_option_get, 1699 .setter = team_port_en_option_set, 1700 }, 1701 { 1702 .name = "rx_enabled", 1703 .type = TEAM_OPTION_TYPE_BOOL, 1704 .per_port = true, 1705 .getter = team_port_rx_en_option_get, 1706 .setter = team_port_rx_en_option_set, 1707 }, 1708 { 1709 .name = "tx_enabled", 1710 .type = TEAM_OPTION_TYPE_BOOL, 1711 .per_port = true, 1712 .getter = team_port_tx_en_option_get, 1713 .setter = team_port_tx_en_option_set, 1714 }, 1715 { 1716 .name = "user_linkup", 1717 .type = TEAM_OPTION_TYPE_BOOL, 1718 .per_port = true, 1719 .getter = team_user_linkup_option_get, 1720 .setter = team_user_linkup_option_set, 1721 }, 1722 { 1723 .name = "user_linkup_enabled", 1724 .type = TEAM_OPTION_TYPE_BOOL, 1725 .per_port = true, 1726 .getter = team_user_linkup_en_option_get, 1727 .setter = team_user_linkup_en_option_set, 1728 }, 1729 { 1730 .name = "priority", 1731 .type = TEAM_OPTION_TYPE_S32, 1732 .per_port = true, 1733 .getter = team_priority_option_get, 1734 .setter = team_priority_option_set, 1735 }, 1736 { 1737 .name = "queue_id", 1738 .type = TEAM_OPTION_TYPE_U32, 1739 .per_port = true, 1740 .getter = team_queue_id_option_get, 1741 .setter = team_queue_id_option_set, 1742 }, 1743 }; 1744 1745 1746 static int team_init(struct net_device *dev) 1747 { 1748 struct team *team = netdev_priv(dev); 1749 int i; 1750 int err; 1751 1752 team_set_no_mode(team); 1753 team->notifier_ctx = false; 1754 1755 team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats); 1756 if (!team->pcpu_stats) 1757 return -ENOMEM; 1758 1759 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++) 1760 INIT_HLIST_HEAD(&team->tx_en_port_hlist[i]); 1761 INIT_LIST_HEAD(&team->port_list); 1762 err = team_queue_override_init(team); 1763 if (err) 1764 goto err_team_queue_override_init; 1765 1766 team_adjust_ops(team); 1767 1768 INIT_LIST_HEAD(&team->option_list); 1769 INIT_LIST_HEAD(&team->option_inst_list); 1770 1771 team_notify_peers_init(team); 1772 team_mcast_rejoin_init(team); 1773 1774 err = team_options_register(team, team_options, ARRAY_SIZE(team_options)); 1775 if (err) 1776 goto err_options_register; 1777 netif_carrier_off(dev); 1778 1779 netdev_lockdep_set_classes(dev); 1780 1781 return 0; 1782 1783 err_options_register: 1784 team_mcast_rejoin_fini(team); 1785 team_notify_peers_fini(team); 1786 team_queue_override_fini(team); 1787 err_team_queue_override_init: 1788 free_percpu(team->pcpu_stats); 1789 1790 return err; 1791 } 1792 1793 static void team_uninit(struct net_device *dev) 1794 { 1795 struct team *team = netdev_priv(dev); 1796 struct team_port *port; 1797 struct team_port *tmp; 1798 1799 ASSERT_RTNL(); 1800 1801 list_for_each_entry_safe(port, tmp, &team->port_list, list) 1802 team_port_del(team, port->dev, false); 1803 1804 __team_change_mode(team, NULL); /* cleanup */ 1805 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options)); 1806 team_mcast_rejoin_fini(team); 1807 team_notify_peers_fini(team); 1808 team_queue_override_fini(team); 1809 netdev_change_features(dev); 1810 } 1811 1812 static void team_destructor(struct net_device *dev) 1813 { 1814 struct team *team = netdev_priv(dev); 1815 1816 free_percpu(team->pcpu_stats); 1817 } 1818 1819 static int team_open(struct net_device *dev) 1820 { 1821 return 0; 1822 } 1823 1824 static int team_close(struct net_device *dev) 1825 { 1826 struct team *team = netdev_priv(dev); 1827 struct team_port *port; 1828 1829 list_for_each_entry(port, &team->port_list, list) { 1830 dev_uc_unsync(port->dev, dev); 1831 dev_mc_unsync(port->dev, dev); 1832 } 1833 1834 return 0; 1835 } 1836 1837 /* 1838 * note: already called with rcu_read_lock 1839 */ 1840 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev) 1841 { 1842 struct team *team = netdev_priv(dev); 1843 bool tx_success; 1844 unsigned int len = skb->len; 1845 1846 tx_success = team_queue_override_transmit(team, skb); 1847 if (!tx_success) 1848 tx_success = team->ops.transmit(team, skb); 1849 if (tx_success) { 1850 struct team_pcpu_stats *pcpu_stats; 1851 1852 pcpu_stats = this_cpu_ptr(team->pcpu_stats); 1853 u64_stats_update_begin(&pcpu_stats->syncp); 1854 u64_stats_inc(&pcpu_stats->tx_packets); 1855 u64_stats_add(&pcpu_stats->tx_bytes, len); 1856 u64_stats_update_end(&pcpu_stats->syncp); 1857 } else { 1858 this_cpu_inc(team->pcpu_stats->tx_dropped); 1859 } 1860 1861 return NETDEV_TX_OK; 1862 } 1863 1864 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb, 1865 struct net_device *sb_dev) 1866 { 1867 /* 1868 * This helper function exists to help dev_pick_tx get the correct 1869 * destination queue. Using a helper function skips a call to 1870 * skb_tx_hash and will put the skbs in the queue we expect on their 1871 * way down to the team driver. 1872 */ 1873 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0; 1874 1875 /* 1876 * Save the original txq to restore before passing to the driver 1877 */ 1878 qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping; 1879 1880 if (unlikely(txq >= dev->real_num_tx_queues)) { 1881 do { 1882 txq -= dev->real_num_tx_queues; 1883 } while (txq >= dev->real_num_tx_queues); 1884 } 1885 return txq; 1886 } 1887 1888 static void team_change_rx_flags(struct net_device *dev, int change) 1889 { 1890 struct team *team = netdev_priv(dev); 1891 struct team_port *port; 1892 int inc; 1893 1894 ASSERT_RTNL(); 1895 1896 list_for_each_entry(port, &team->port_list, list) { 1897 if (change & IFF_PROMISC) { 1898 inc = dev->flags & IFF_PROMISC ? 1 : -1; 1899 dev_set_promiscuity(port->dev, inc); 1900 } 1901 if (change & IFF_ALLMULTI) { 1902 inc = dev->flags & IFF_ALLMULTI ? 1 : -1; 1903 dev_set_allmulti(port->dev, inc); 1904 } 1905 } 1906 } 1907 1908 static void team_set_rx_mode(struct net_device *dev) 1909 { 1910 struct team *team = netdev_priv(dev); 1911 struct team_port *port; 1912 1913 rcu_read_lock(); 1914 list_for_each_entry_rcu(port, &team->port_list, list) { 1915 dev_uc_sync_multiple(port->dev, dev); 1916 dev_mc_sync_multiple(port->dev, dev); 1917 } 1918 rcu_read_unlock(); 1919 } 1920 1921 static int team_set_mac_address(struct net_device *dev, void *p) 1922 { 1923 struct sockaddr *addr = p; 1924 struct team *team = netdev_priv(dev); 1925 struct team_port *port; 1926 1927 ASSERT_RTNL(); 1928 1929 if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data)) 1930 return -EADDRNOTAVAIL; 1931 dev_addr_set(dev, addr->sa_data); 1932 list_for_each_entry(port, &team->port_list, list) 1933 if (team->ops.port_change_dev_addr) 1934 team->ops.port_change_dev_addr(team, port); 1935 return 0; 1936 } 1937 1938 static int team_change_mtu(struct net_device *dev, int new_mtu) 1939 { 1940 struct team *team = netdev_priv(dev); 1941 struct team_port *port; 1942 int err; 1943 1944 ASSERT_RTNL(); 1945 1946 team->port_mtu_change_allowed = true; 1947 list_for_each_entry(port, &team->port_list, list) { 1948 err = dev_set_mtu(port->dev, new_mtu); 1949 if (err) { 1950 netdev_err(dev, "Device %s failed to change mtu", 1951 port->dev->name); 1952 goto unwind; 1953 } 1954 } 1955 team->port_mtu_change_allowed = false; 1956 1957 WRITE_ONCE(dev->mtu, new_mtu); 1958 1959 return 0; 1960 1961 unwind: 1962 list_for_each_entry_continue_reverse(port, &team->port_list, list) 1963 dev_set_mtu(port->dev, dev->mtu); 1964 team->port_mtu_change_allowed = false; 1965 1966 return err; 1967 } 1968 1969 static void 1970 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 1971 { 1972 struct team *team = netdev_priv(dev); 1973 struct team_pcpu_stats *p; 1974 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes; 1975 u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0; 1976 unsigned int start; 1977 int i; 1978 1979 for_each_possible_cpu(i) { 1980 p = per_cpu_ptr(team->pcpu_stats, i); 1981 do { 1982 start = u64_stats_fetch_begin(&p->syncp); 1983 rx_packets = u64_stats_read(&p->rx_packets); 1984 rx_bytes = u64_stats_read(&p->rx_bytes); 1985 rx_multicast = u64_stats_read(&p->rx_multicast); 1986 tx_packets = u64_stats_read(&p->tx_packets); 1987 tx_bytes = u64_stats_read(&p->tx_bytes); 1988 } while (u64_stats_fetch_retry(&p->syncp, start)); 1989 1990 stats->rx_packets += rx_packets; 1991 stats->rx_bytes += rx_bytes; 1992 stats->multicast += rx_multicast; 1993 stats->tx_packets += tx_packets; 1994 stats->tx_bytes += tx_bytes; 1995 /* 1996 * rx_dropped, tx_dropped & rx_nohandler are u32, 1997 * updated without syncp protection. 1998 */ 1999 rx_dropped += READ_ONCE(p->rx_dropped); 2000 tx_dropped += READ_ONCE(p->tx_dropped); 2001 rx_nohandler += READ_ONCE(p->rx_nohandler); 2002 } 2003 stats->rx_dropped = rx_dropped; 2004 stats->tx_dropped = tx_dropped; 2005 stats->rx_nohandler = rx_nohandler; 2006 } 2007 2008 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) 2009 { 2010 struct team *team = netdev_priv(dev); 2011 struct team_port *port; 2012 int err; 2013 2014 ASSERT_RTNL(); 2015 2016 list_for_each_entry(port, &team->port_list, list) { 2017 err = vlan_vid_add(port->dev, proto, vid); 2018 if (err) 2019 goto unwind; 2020 } 2021 2022 return 0; 2023 2024 unwind: 2025 list_for_each_entry_continue_reverse(port, &team->port_list, list) 2026 vlan_vid_del(port->dev, proto, vid); 2027 2028 return err; 2029 } 2030 2031 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid) 2032 { 2033 struct team *team = netdev_priv(dev); 2034 struct team_port *port; 2035 2036 ASSERT_RTNL(); 2037 2038 list_for_each_entry(port, &team->port_list, list) 2039 vlan_vid_del(port->dev, proto, vid); 2040 2041 return 0; 2042 } 2043 2044 #ifdef CONFIG_NET_POLL_CONTROLLER 2045 static void team_poll_controller(struct net_device *dev) 2046 { 2047 } 2048 2049 static void __team_netpoll_cleanup(struct team *team) 2050 { 2051 struct team_port *port; 2052 2053 list_for_each_entry(port, &team->port_list, list) 2054 team_port_disable_netpoll(port); 2055 } 2056 2057 static void team_netpoll_cleanup(struct net_device *dev) 2058 { 2059 struct team *team = netdev_priv(dev); 2060 2061 ASSERT_RTNL(); 2062 2063 __team_netpoll_cleanup(team); 2064 } 2065 2066 static int team_netpoll_setup(struct net_device *dev) 2067 { 2068 struct team *team = netdev_priv(dev); 2069 struct team_port *port; 2070 int err = 0; 2071 2072 ASSERT_RTNL(); 2073 2074 list_for_each_entry(port, &team->port_list, list) { 2075 err = __team_port_enable_netpoll(port); 2076 if (err) { 2077 __team_netpoll_cleanup(team); 2078 break; 2079 } 2080 } 2081 return err; 2082 } 2083 #endif 2084 2085 static int team_add_slave(struct net_device *dev, struct net_device *port_dev, 2086 struct netlink_ext_ack *extack) 2087 { 2088 struct team *team = netdev_priv(dev); 2089 2090 ASSERT_RTNL(); 2091 2092 return team_port_add(team, port_dev, extack); 2093 } 2094 2095 static int team_del_slave(struct net_device *dev, struct net_device *port_dev) 2096 { 2097 struct team *team = netdev_priv(dev); 2098 2099 ASSERT_RTNL(); 2100 2101 return team_port_del(team, port_dev, false); 2102 } 2103 2104 static int team_del_slave_on_unregister(struct net_device *dev, struct net_device *port_dev) 2105 { 2106 struct team *team = netdev_priv(dev); 2107 2108 ASSERT_RTNL(); 2109 2110 return team_port_del(team, port_dev, true); 2111 } 2112 2113 static netdev_features_t team_fix_features(struct net_device *dev, 2114 netdev_features_t features) 2115 { 2116 struct team_port *port; 2117 struct team *team = netdev_priv(dev); 2118 netdev_features_t mask; 2119 2120 mask = features; 2121 features = netdev_base_features(features); 2122 2123 rcu_read_lock(); 2124 list_for_each_entry_rcu(port, &team->port_list, list) { 2125 features = netdev_increment_features(features, 2126 port->dev->features, 2127 mask); 2128 } 2129 rcu_read_unlock(); 2130 2131 features = netdev_add_tso_features(features, mask); 2132 2133 return features; 2134 } 2135 2136 static int team_change_carrier(struct net_device *dev, bool new_carrier) 2137 { 2138 struct team *team = netdev_priv(dev); 2139 2140 team->user_carrier_enabled = true; 2141 2142 if (new_carrier) 2143 netif_carrier_on(dev); 2144 else 2145 netif_carrier_off(dev); 2146 return 0; 2147 } 2148 2149 static const struct net_device_ops team_netdev_ops = { 2150 .ndo_init = team_init, 2151 .ndo_uninit = team_uninit, 2152 .ndo_open = team_open, 2153 .ndo_stop = team_close, 2154 .ndo_start_xmit = team_xmit, 2155 .ndo_select_queue = team_select_queue, 2156 .ndo_change_rx_flags = team_change_rx_flags, 2157 .ndo_set_rx_mode = team_set_rx_mode, 2158 .ndo_set_mac_address = team_set_mac_address, 2159 .ndo_change_mtu = team_change_mtu, 2160 .ndo_get_stats64 = team_get_stats64, 2161 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid, 2162 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid, 2163 #ifdef CONFIG_NET_POLL_CONTROLLER 2164 .ndo_poll_controller = team_poll_controller, 2165 .ndo_netpoll_setup = team_netpoll_setup, 2166 .ndo_netpoll_cleanup = team_netpoll_cleanup, 2167 #endif 2168 .ndo_add_slave = team_add_slave, 2169 .ndo_del_slave = team_del_slave, 2170 .ndo_fix_features = team_fix_features, 2171 .ndo_change_carrier = team_change_carrier, 2172 .ndo_features_check = passthru_features_check, 2173 }; 2174 2175 /*********************** 2176 * ethtool interface 2177 ***********************/ 2178 2179 static void team_ethtool_get_drvinfo(struct net_device *dev, 2180 struct ethtool_drvinfo *drvinfo) 2181 { 2182 strscpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver)); 2183 } 2184 2185 static int team_ethtool_get_link_ksettings(struct net_device *dev, 2186 struct ethtool_link_ksettings *cmd) 2187 { 2188 struct team *team= netdev_priv(dev); 2189 unsigned long speed = 0; 2190 struct team_port *port; 2191 2192 cmd->base.duplex = DUPLEX_UNKNOWN; 2193 cmd->base.port = PORT_OTHER; 2194 2195 rcu_read_lock(); 2196 list_for_each_entry_rcu(port, &team->port_list, list) { 2197 if (team_port_txable(port)) { 2198 if (port->state.speed != SPEED_UNKNOWN) 2199 speed += port->state.speed; 2200 if (cmd->base.duplex == DUPLEX_UNKNOWN && 2201 port->state.duplex != DUPLEX_UNKNOWN) 2202 cmd->base.duplex = port->state.duplex; 2203 } 2204 } 2205 rcu_read_unlock(); 2206 2207 cmd->base.speed = speed ? : SPEED_UNKNOWN; 2208 2209 return 0; 2210 } 2211 2212 static const struct ethtool_ops team_ethtool_ops = { 2213 .get_drvinfo = team_ethtool_get_drvinfo, 2214 .get_link = ethtool_op_get_link, 2215 .get_link_ksettings = team_ethtool_get_link_ksettings, 2216 }; 2217 2218 /*********************** 2219 * rt netlink interface 2220 ***********************/ 2221 2222 /* For tx path we need a linkup && enabled port and for parse any port 2223 * suffices. 2224 */ 2225 static struct team_port *team_header_port_get_rcu(struct team *team, 2226 bool txable) 2227 { 2228 struct team_port *port; 2229 2230 list_for_each_entry_rcu(port, &team->port_list, list) { 2231 if (!txable || team_port_txable(port)) 2232 return port; 2233 } 2234 2235 return NULL; 2236 } 2237 2238 static int team_header_create(struct sk_buff *skb, struct net_device *team_dev, 2239 unsigned short type, const void *daddr, 2240 const void *saddr, unsigned int len) 2241 { 2242 struct team *team = netdev_priv(team_dev); 2243 const struct header_ops *port_ops; 2244 struct team_port *port; 2245 int ret = 0; 2246 2247 rcu_read_lock(); 2248 port = team_header_port_get_rcu(team, true); 2249 if (port) { 2250 port_ops = READ_ONCE(port->dev->header_ops); 2251 if (port_ops && port_ops->create) 2252 ret = port_ops->create(skb, port->dev, 2253 type, daddr, saddr, len); 2254 } 2255 rcu_read_unlock(); 2256 return ret; 2257 } 2258 2259 static int team_header_parse(const struct sk_buff *skb, 2260 const struct net_device *team_dev, 2261 unsigned char *haddr) 2262 { 2263 struct team *team = netdev_priv(team_dev); 2264 const struct header_ops *port_ops; 2265 struct team_port *port; 2266 int ret = 0; 2267 2268 rcu_read_lock(); 2269 port = team_header_port_get_rcu(team, false); 2270 if (port) { 2271 port_ops = READ_ONCE(port->dev->header_ops); 2272 if (port_ops && port_ops->parse) 2273 ret = port_ops->parse(skb, port->dev, haddr); 2274 } 2275 rcu_read_unlock(); 2276 return ret; 2277 } 2278 2279 static const struct header_ops team_header_ops = { 2280 .create = team_header_create, 2281 .parse = team_header_parse, 2282 }; 2283 2284 static void team_setup_by_port(struct net_device *dev, 2285 struct net_device *port_dev) 2286 { 2287 struct team *team = netdev_priv(dev); 2288 2289 if (port_dev->type == ARPHRD_ETHER) 2290 dev->header_ops = team->header_ops_cache; 2291 else 2292 dev->header_ops = port_dev->header_ops ? 2293 &team_header_ops : NULL; 2294 dev->type = port_dev->type; 2295 dev->hard_header_len = port_dev->hard_header_len; 2296 dev->needed_headroom = port_dev->needed_headroom; 2297 dev->addr_len = port_dev->addr_len; 2298 dev->mtu = port_dev->mtu; 2299 memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len); 2300 eth_hw_addr_inherit(dev, port_dev); 2301 2302 if (port_dev->flags & IFF_POINTOPOINT) { 2303 dev->flags &= ~(IFF_BROADCAST | IFF_MULTICAST); 2304 dev->flags |= (IFF_POINTOPOINT | IFF_NOARP); 2305 } else if ((port_dev->flags & (IFF_BROADCAST | IFF_MULTICAST)) == 2306 (IFF_BROADCAST | IFF_MULTICAST)) { 2307 dev->flags |= (IFF_BROADCAST | IFF_MULTICAST); 2308 dev->flags &= ~(IFF_POINTOPOINT | IFF_NOARP); 2309 } 2310 } 2311 2312 static int team_dev_type_check_change(struct net_device *dev, 2313 struct net_device *port_dev) 2314 { 2315 struct team *team = netdev_priv(dev); 2316 char *portname = port_dev->name; 2317 int err; 2318 2319 if (dev->type == port_dev->type) 2320 return 0; 2321 if (!list_empty(&team->port_list)) { 2322 netdev_err(dev, "Device %s is of different type\n", portname); 2323 return -EBUSY; 2324 } 2325 err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev); 2326 err = notifier_to_errno(err); 2327 if (err) { 2328 netdev_err(dev, "Refused to change device type\n"); 2329 return err; 2330 } 2331 dev_uc_flush(dev); 2332 dev_mc_flush(dev); 2333 team_setup_by_port(dev, port_dev); 2334 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev); 2335 return 0; 2336 } 2337 2338 static void team_setup(struct net_device *dev) 2339 { 2340 struct team *team = netdev_priv(dev); 2341 2342 ether_setup(dev); 2343 dev->max_mtu = ETH_MAX_MTU; 2344 team->header_ops_cache = dev->header_ops; 2345 2346 dev->netdev_ops = &team_netdev_ops; 2347 dev->ethtool_ops = &team_ethtool_ops; 2348 dev->needs_free_netdev = true; 2349 dev->priv_destructor = team_destructor; 2350 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); 2351 dev->priv_flags |= IFF_NO_QUEUE; 2352 dev->priv_flags |= IFF_TEAM; 2353 2354 /* 2355 * Indicate we support unicast address filtering. That way core won't 2356 * bring us to promisc mode in case a unicast addr is added. 2357 * Let this up to underlay drivers. 2358 */ 2359 dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE; 2360 dev->lltx = true; 2361 2362 /* Don't allow team devices to change network namespaces. */ 2363 dev->netns_immutable = true; 2364 2365 dev->features |= NETIF_F_GRO; 2366 2367 dev->hw_features = MASTER_UPPER_DEV_VLAN_FEATURES | 2368 NETIF_F_HW_VLAN_CTAG_RX | 2369 NETIF_F_HW_VLAN_CTAG_FILTER | 2370 NETIF_F_HW_VLAN_STAG_RX | 2371 NETIF_F_HW_VLAN_STAG_FILTER; 2372 2373 dev->hw_features |= NETIF_F_GSO_ENCAP_ALL; 2374 dev->features |= dev->hw_features; 2375 dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; 2376 } 2377 2378 static int team_newlink(struct net_device *dev, 2379 struct rtnl_newlink_params *params, 2380 struct netlink_ext_ack *extack) 2381 { 2382 struct nlattr **tb = params->tb; 2383 2384 if (tb[IFLA_ADDRESS] == NULL) 2385 eth_hw_addr_random(dev); 2386 2387 return register_netdevice(dev); 2388 } 2389 2390 static int team_validate(struct nlattr *tb[], struct nlattr *data[], 2391 struct netlink_ext_ack *extack) 2392 { 2393 if (tb[IFLA_ADDRESS]) { 2394 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) 2395 return -EINVAL; 2396 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) 2397 return -EADDRNOTAVAIL; 2398 } 2399 return 0; 2400 } 2401 2402 static unsigned int team_get_num_tx_queues(void) 2403 { 2404 return TEAM_DEFAULT_NUM_TX_QUEUES; 2405 } 2406 2407 static unsigned int team_get_num_rx_queues(void) 2408 { 2409 return TEAM_DEFAULT_NUM_RX_QUEUES; 2410 } 2411 2412 static struct rtnl_link_ops team_link_ops __read_mostly = { 2413 .kind = DRV_NAME, 2414 .priv_size = sizeof(struct team), 2415 .setup = team_setup, 2416 .newlink = team_newlink, 2417 .validate = team_validate, 2418 .get_num_tx_queues = team_get_num_tx_queues, 2419 .get_num_rx_queues = team_get_num_rx_queues, 2420 }; 2421 2422 2423 /*********************************** 2424 * Generic netlink custom interface 2425 ***********************************/ 2426 2427 static struct genl_family team_nl_family; 2428 2429 int team_nl_noop_doit(struct sk_buff *skb, struct genl_info *info) 2430 { 2431 struct sk_buff *msg; 2432 void *hdr; 2433 int err; 2434 2435 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 2436 if (!msg) 2437 return -ENOMEM; 2438 2439 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq, 2440 &team_nl_family, 0, TEAM_CMD_NOOP); 2441 if (!hdr) { 2442 err = -EMSGSIZE; 2443 goto err_msg_put; 2444 } 2445 2446 genlmsg_end(msg, hdr); 2447 2448 return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid); 2449 2450 err_msg_put: 2451 nlmsg_free(msg); 2452 2453 return err; 2454 } 2455 2456 /* 2457 * Netlink cmd functions should be locked by following two functions. 2458 * Since dev gets held here, that ensures dev won't disappear in between. 2459 */ 2460 static struct team *team_nl_team_get(struct genl_info *info) 2461 { 2462 struct net *net = genl_info_net(info); 2463 struct net_device *dev; 2464 int ifindex; 2465 2466 ASSERT_RTNL(); 2467 2468 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX]) 2469 return NULL; 2470 2471 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]); 2472 dev = dev_get_by_index(net, ifindex); 2473 if (!dev || dev->netdev_ops != &team_netdev_ops) { 2474 dev_put(dev); 2475 return NULL; 2476 } 2477 2478 return netdev_priv(dev); 2479 } 2480 2481 static void team_nl_team_put(struct team *team) 2482 { 2483 dev_put(netdev_from_priv(team)); 2484 } 2485 2486 typedef int team_nl_send_func_t(struct sk_buff *skb, 2487 struct team *team, u32 portid); 2488 2489 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid) 2490 { 2491 return genlmsg_unicast(dev_net(netdev_from_priv(team)), skb, portid); 2492 } 2493 2494 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team, 2495 struct team_option_inst *opt_inst) 2496 { 2497 struct nlattr *option_item; 2498 struct team_option *option = opt_inst->option; 2499 struct team_option_inst_info *opt_inst_info = &opt_inst->info; 2500 struct team_gsetter_ctx ctx; 2501 int err; 2502 2503 ctx.info = opt_inst_info; 2504 err = team_option_get(team, opt_inst, &ctx); 2505 if (err) 2506 return err; 2507 2508 option_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_OPTION); 2509 if (!option_item) 2510 return -EMSGSIZE; 2511 2512 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name)) 2513 goto nest_cancel; 2514 if (opt_inst_info->port && 2515 nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX, 2516 opt_inst_info->port->dev->ifindex)) 2517 goto nest_cancel; 2518 if (opt_inst->option->array_size && 2519 nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX, 2520 opt_inst_info->array_index)) 2521 goto nest_cancel; 2522 2523 switch (option->type) { 2524 case TEAM_OPTION_TYPE_U32: 2525 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32)) 2526 goto nest_cancel; 2527 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val)) 2528 goto nest_cancel; 2529 break; 2530 case TEAM_OPTION_TYPE_STRING: 2531 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING)) 2532 goto nest_cancel; 2533 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA, 2534 ctx.data.str_val)) 2535 goto nest_cancel; 2536 break; 2537 case TEAM_OPTION_TYPE_BINARY: 2538 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY)) 2539 goto nest_cancel; 2540 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len, 2541 ctx.data.bin_val.ptr)) 2542 goto nest_cancel; 2543 break; 2544 case TEAM_OPTION_TYPE_BOOL: 2545 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG)) 2546 goto nest_cancel; 2547 if (ctx.data.bool_val && 2548 nla_put_flag(skb, TEAM_ATTR_OPTION_DATA)) 2549 goto nest_cancel; 2550 break; 2551 case TEAM_OPTION_TYPE_S32: 2552 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32)) 2553 goto nest_cancel; 2554 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val)) 2555 goto nest_cancel; 2556 break; 2557 default: 2558 BUG(); 2559 } 2560 if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED)) 2561 goto nest_cancel; 2562 if (opt_inst->changed) { 2563 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED)) 2564 goto nest_cancel; 2565 opt_inst->changed = false; 2566 } 2567 nla_nest_end(skb, option_item); 2568 return 0; 2569 2570 nest_cancel: 2571 nla_nest_cancel(skb, option_item); 2572 return -EMSGSIZE; 2573 } 2574 2575 static int __send_and_alloc_skb(struct sk_buff **pskb, 2576 struct team *team, u32 portid, 2577 team_nl_send_func_t *send_func) 2578 { 2579 int err; 2580 2581 if (*pskb) { 2582 err = send_func(*pskb, team, portid); 2583 if (err) 2584 return err; 2585 } 2586 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL); 2587 if (!*pskb) 2588 return -ENOMEM; 2589 return 0; 2590 } 2591 2592 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq, 2593 int flags, team_nl_send_func_t *send_func, 2594 struct list_head *sel_opt_inst_list) 2595 { 2596 struct nlattr *option_list; 2597 struct nlmsghdr *nlh; 2598 void *hdr; 2599 struct team_option_inst *opt_inst; 2600 int err; 2601 struct sk_buff *skb = NULL; 2602 bool incomplete; 2603 int i; 2604 2605 opt_inst = list_first_entry(sel_opt_inst_list, 2606 struct team_option_inst, tmp_list); 2607 2608 start_again: 2609 err = __send_and_alloc_skb(&skb, team, portid, send_func); 2610 if (err) 2611 return err; 2612 2613 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI, 2614 TEAM_CMD_OPTIONS_GET); 2615 if (!hdr) { 2616 nlmsg_free(skb); 2617 return -EMSGSIZE; 2618 } 2619 2620 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, 2621 netdev_from_priv(team)->ifindex)) 2622 goto nla_put_failure; 2623 option_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_OPTION); 2624 if (!option_list) 2625 goto nla_put_failure; 2626 2627 i = 0; 2628 incomplete = false; 2629 list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) { 2630 err = team_nl_fill_one_option_get(skb, team, opt_inst); 2631 if (err) { 2632 if (err == -EMSGSIZE) { 2633 if (!i) 2634 goto errout; 2635 incomplete = true; 2636 break; 2637 } 2638 goto errout; 2639 } 2640 i++; 2641 } 2642 2643 nla_nest_end(skb, option_list); 2644 genlmsg_end(skb, hdr); 2645 if (incomplete) 2646 goto start_again; 2647 2648 send_done: 2649 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI); 2650 if (!nlh) { 2651 err = __send_and_alloc_skb(&skb, team, portid, send_func); 2652 if (err) 2653 return err; 2654 goto send_done; 2655 } 2656 2657 return send_func(skb, team, portid); 2658 2659 nla_put_failure: 2660 err = -EMSGSIZE; 2661 errout: 2662 nlmsg_free(skb); 2663 return err; 2664 } 2665 2666 int team_nl_options_get_doit(struct sk_buff *skb, struct genl_info *info) 2667 { 2668 struct team *team; 2669 struct team_option_inst *opt_inst; 2670 int err; 2671 LIST_HEAD(sel_opt_inst_list); 2672 2673 rtnl_lock(); 2674 2675 team = team_nl_team_get(info); 2676 if (!team) { 2677 err = -EINVAL; 2678 goto rtnl_unlock; 2679 } 2680 2681 list_for_each_entry(opt_inst, &team->option_inst_list, list) 2682 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list); 2683 err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq, 2684 NLM_F_ACK, team_nl_send_unicast, 2685 &sel_opt_inst_list); 2686 2687 team_nl_team_put(team); 2688 2689 rtnl_unlock: 2690 rtnl_unlock(); 2691 2692 return err; 2693 } 2694 2695 static int team_nl_send_event_options_get(struct team *team, 2696 struct list_head *sel_opt_inst_list); 2697 2698 int team_nl_options_set_doit(struct sk_buff *skb, struct genl_info *info) 2699 { 2700 struct team *team; 2701 int err = 0; 2702 int i; 2703 struct nlattr *nl_option; 2704 2705 rtnl_lock(); 2706 2707 team = team_nl_team_get(info); 2708 if (!team) { 2709 err = -EINVAL; 2710 goto rtnl_unlock; 2711 } 2712 2713 err = -EINVAL; 2714 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) { 2715 err = -EINVAL; 2716 goto team_put; 2717 } 2718 2719 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) { 2720 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1]; 2721 struct nlattr *attr; 2722 struct nlattr *attr_data; 2723 LIST_HEAD(opt_inst_list); 2724 enum team_option_type opt_type; 2725 int opt_port_ifindex = 0; /* != 0 for per-port options */ 2726 u32 opt_array_index = 0; 2727 bool opt_is_array = false; 2728 struct team_option_inst *opt_inst; 2729 char *opt_name; 2730 bool opt_found = false; 2731 2732 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) { 2733 err = -EINVAL; 2734 goto team_put; 2735 } 2736 err = nla_parse_nested_deprecated(opt_attrs, 2737 TEAM_ATTR_OPTION_MAX, 2738 nl_option, 2739 team_attr_option_nl_policy, 2740 info->extack); 2741 if (err) 2742 goto team_put; 2743 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] || 2744 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) { 2745 err = -EINVAL; 2746 goto team_put; 2747 } 2748 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) { 2749 case NLA_U32: 2750 opt_type = TEAM_OPTION_TYPE_U32; 2751 break; 2752 case NLA_STRING: 2753 opt_type = TEAM_OPTION_TYPE_STRING; 2754 break; 2755 case NLA_BINARY: 2756 opt_type = TEAM_OPTION_TYPE_BINARY; 2757 break; 2758 case NLA_FLAG: 2759 opt_type = TEAM_OPTION_TYPE_BOOL; 2760 break; 2761 case NLA_S32: 2762 opt_type = TEAM_OPTION_TYPE_S32; 2763 break; 2764 default: 2765 goto team_put; 2766 } 2767 2768 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA]; 2769 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) { 2770 err = -EINVAL; 2771 goto team_put; 2772 } 2773 2774 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]); 2775 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX]; 2776 if (attr) 2777 opt_port_ifindex = nla_get_u32(attr); 2778 2779 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX]; 2780 if (attr) { 2781 opt_is_array = true; 2782 opt_array_index = nla_get_u32(attr); 2783 } 2784 2785 list_for_each_entry(opt_inst, &team->option_inst_list, list) { 2786 struct team_option *option = opt_inst->option; 2787 struct team_gsetter_ctx ctx; 2788 struct team_option_inst_info *opt_inst_info; 2789 int tmp_ifindex; 2790 2791 opt_inst_info = &opt_inst->info; 2792 tmp_ifindex = opt_inst_info->port ? 2793 opt_inst_info->port->dev->ifindex : 0; 2794 if (option->type != opt_type || 2795 strcmp(option->name, opt_name) || 2796 tmp_ifindex != opt_port_ifindex || 2797 (option->array_size && !opt_is_array) || 2798 opt_inst_info->array_index != opt_array_index) 2799 continue; 2800 opt_found = true; 2801 ctx.info = opt_inst_info; 2802 switch (opt_type) { 2803 case TEAM_OPTION_TYPE_U32: 2804 ctx.data.u32_val = nla_get_u32(attr_data); 2805 break; 2806 case TEAM_OPTION_TYPE_STRING: 2807 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN || 2808 !memchr(nla_data(attr_data), '\0', 2809 nla_len(attr_data))) { 2810 err = -EINVAL; 2811 goto team_put; 2812 } 2813 ctx.data.str_val = nla_data(attr_data); 2814 break; 2815 case TEAM_OPTION_TYPE_BINARY: 2816 ctx.data.bin_val.len = nla_len(attr_data); 2817 ctx.data.bin_val.ptr = nla_data(attr_data); 2818 break; 2819 case TEAM_OPTION_TYPE_BOOL: 2820 ctx.data.bool_val = attr_data ? true : false; 2821 break; 2822 case TEAM_OPTION_TYPE_S32: 2823 ctx.data.s32_val = nla_get_s32(attr_data); 2824 break; 2825 default: 2826 BUG(); 2827 } 2828 err = team_option_set(team, opt_inst, &ctx); 2829 if (err) 2830 goto team_put; 2831 opt_inst->changed = true; 2832 list_add(&opt_inst->tmp_list, &opt_inst_list); 2833 } 2834 if (!opt_found) { 2835 err = -ENOENT; 2836 goto team_put; 2837 } 2838 2839 err = team_nl_send_event_options_get(team, &opt_inst_list); 2840 if (err) 2841 break; 2842 } 2843 2844 team_put: 2845 team_nl_team_put(team); 2846 rtnl_unlock: 2847 rtnl_unlock(); 2848 return err; 2849 } 2850 2851 static int team_nl_fill_one_port_get(struct sk_buff *skb, 2852 struct team_port *port) 2853 { 2854 struct nlattr *port_item; 2855 2856 port_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_PORT); 2857 if (!port_item) 2858 goto nest_cancel; 2859 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex)) 2860 goto nest_cancel; 2861 if (port->changed) { 2862 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED)) 2863 goto nest_cancel; 2864 port->changed = false; 2865 } 2866 if ((port->removed && 2867 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) || 2868 (port->state.linkup && 2869 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) || 2870 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) || 2871 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex)) 2872 goto nest_cancel; 2873 nla_nest_end(skb, port_item); 2874 return 0; 2875 2876 nest_cancel: 2877 nla_nest_cancel(skb, port_item); 2878 return -EMSGSIZE; 2879 } 2880 2881 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq, 2882 int flags, team_nl_send_func_t *send_func, 2883 struct team_port *one_port) 2884 { 2885 struct nlattr *port_list; 2886 struct nlmsghdr *nlh; 2887 void *hdr; 2888 struct team_port *port; 2889 int err; 2890 struct sk_buff *skb = NULL; 2891 bool incomplete; 2892 int i; 2893 2894 port = list_first_entry_or_null(&team->port_list, 2895 struct team_port, list); 2896 2897 start_again: 2898 err = __send_and_alloc_skb(&skb, team, portid, send_func); 2899 if (err) 2900 return err; 2901 2902 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI, 2903 TEAM_CMD_PORT_LIST_GET); 2904 if (!hdr) { 2905 nlmsg_free(skb); 2906 return -EMSGSIZE; 2907 } 2908 2909 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, 2910 netdev_from_priv(team)->ifindex)) 2911 goto nla_put_failure; 2912 port_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_PORT); 2913 if (!port_list) 2914 goto nla_put_failure; 2915 2916 i = 0; 2917 incomplete = false; 2918 2919 /* If one port is selected, called wants to send port list containing 2920 * only this port. Otherwise go through all listed ports and send all 2921 */ 2922 if (one_port) { 2923 err = team_nl_fill_one_port_get(skb, one_port); 2924 if (err) 2925 goto errout; 2926 } else if (port) { 2927 list_for_each_entry_from(port, &team->port_list, list) { 2928 err = team_nl_fill_one_port_get(skb, port); 2929 if (err) { 2930 if (err == -EMSGSIZE) { 2931 if (!i) 2932 goto errout; 2933 incomplete = true; 2934 break; 2935 } 2936 goto errout; 2937 } 2938 i++; 2939 } 2940 } 2941 2942 nla_nest_end(skb, port_list); 2943 genlmsg_end(skb, hdr); 2944 if (incomplete) 2945 goto start_again; 2946 2947 send_done: 2948 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI); 2949 if (!nlh) { 2950 err = __send_and_alloc_skb(&skb, team, portid, send_func); 2951 if (err) 2952 return err; 2953 goto send_done; 2954 } 2955 2956 return send_func(skb, team, portid); 2957 2958 nla_put_failure: 2959 err = -EMSGSIZE; 2960 errout: 2961 nlmsg_free(skb); 2962 return err; 2963 } 2964 2965 int team_nl_port_list_get_doit(struct sk_buff *skb, 2966 struct genl_info *info) 2967 { 2968 struct team *team; 2969 int err; 2970 2971 rtnl_lock(); 2972 2973 team = team_nl_team_get(info); 2974 if (!team) { 2975 err = -EINVAL; 2976 goto rtnl_unlock; 2977 } 2978 2979 err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq, 2980 NLM_F_ACK, team_nl_send_unicast, NULL); 2981 2982 team_nl_team_put(team); 2983 2984 rtnl_unlock: 2985 rtnl_unlock(); 2986 2987 return err; 2988 } 2989 2990 static const struct genl_multicast_group team_nl_mcgrps[] = { 2991 { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, }, 2992 }; 2993 2994 static struct genl_family team_nl_family __ro_after_init = { 2995 .name = TEAM_GENL_NAME, 2996 .version = TEAM_GENL_VERSION, 2997 .maxattr = ARRAY_SIZE(team_nl_policy) - 1, 2998 .policy = team_nl_policy, 2999 .netnsok = true, 3000 .module = THIS_MODULE, 3001 .small_ops = team_nl_ops, 3002 .n_small_ops = ARRAY_SIZE(team_nl_ops), 3003 .resv_start_op = TEAM_CMD_PORT_LIST_GET + 1, 3004 .mcgrps = team_nl_mcgrps, 3005 .n_mcgrps = ARRAY_SIZE(team_nl_mcgrps), 3006 }; 3007 3008 static int team_nl_send_multicast(struct sk_buff *skb, 3009 struct team *team, u32 portid) 3010 { 3011 return genlmsg_multicast_netns(&team_nl_family, 3012 dev_net(netdev_from_priv(team)), 3013 skb, 0, 0, GFP_KERNEL); 3014 } 3015 3016 static int team_nl_send_event_options_get(struct team *team, 3017 struct list_head *sel_opt_inst_list) 3018 { 3019 return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast, 3020 sel_opt_inst_list); 3021 } 3022 3023 static int team_nl_send_event_port_get(struct team *team, 3024 struct team_port *port) 3025 { 3026 return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast, 3027 port); 3028 } 3029 3030 static int __init team_nl_init(void) 3031 { 3032 return genl_register_family(&team_nl_family); 3033 } 3034 3035 static void __exit team_nl_fini(void) 3036 { 3037 genl_unregister_family(&team_nl_family); 3038 } 3039 3040 3041 /****************** 3042 * Change checkers 3043 ******************/ 3044 3045 static void __team_options_change_check(struct team *team) 3046 { 3047 int err; 3048 struct team_option_inst *opt_inst; 3049 LIST_HEAD(sel_opt_inst_list); 3050 3051 list_for_each_entry(opt_inst, &team->option_inst_list, list) { 3052 if (opt_inst->changed) 3053 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list); 3054 } 3055 err = team_nl_send_event_options_get(team, &sel_opt_inst_list); 3056 if (err && err != -ESRCH) 3057 netdev_warn(netdev_from_priv(team), 3058 "Failed to send options change via netlink (err %d)\n", 3059 err); 3060 } 3061 3062 /* rtnl lock is held */ 3063 3064 static void __team_port_change_send(struct team_port *port, bool linkup) 3065 { 3066 int err; 3067 3068 port->changed = true; 3069 port->state.linkup = linkup; 3070 team_refresh_port_linkup(port); 3071 if (linkup) { 3072 struct ethtool_link_ksettings ecmd; 3073 3074 err = __ethtool_get_link_ksettings(port->dev, &ecmd); 3075 if (!err) { 3076 port->state.speed = ecmd.base.speed; 3077 port->state.duplex = ecmd.base.duplex; 3078 goto send_event; 3079 } 3080 } 3081 port->state.speed = 0; 3082 port->state.duplex = 0; 3083 3084 send_event: 3085 err = team_nl_send_event_port_get(port->team, port); 3086 if (err && err != -ESRCH) 3087 netdev_warn(netdev_from_priv(port->team), 3088 "Failed to send port change of device %s via netlink (err %d)\n", 3089 port->dev->name, err); 3090 3091 } 3092 3093 static void __team_carrier_check(struct team *team) 3094 { 3095 struct team_port *port; 3096 bool team_linkup; 3097 3098 if (team->user_carrier_enabled) 3099 return; 3100 3101 team_linkup = false; 3102 list_for_each_entry(port, &team->port_list, list) { 3103 if (port->linkup) { 3104 team_linkup = true; 3105 break; 3106 } 3107 } 3108 3109 if (team_linkup) 3110 netif_carrier_on(netdev_from_priv(team)); 3111 else 3112 netif_carrier_off(netdev_from_priv(team)); 3113 } 3114 3115 static void __team_port_change_check(struct team_port *port, bool linkup) 3116 { 3117 if (port->state.linkup != linkup) 3118 __team_port_change_send(port, linkup); 3119 __team_carrier_check(port->team); 3120 } 3121 3122 static void __team_port_change_port_added(struct team_port *port, bool linkup) 3123 { 3124 __team_port_change_send(port, linkup); 3125 __team_carrier_check(port->team); 3126 } 3127 3128 static void __team_port_change_port_removed(struct team_port *port) 3129 { 3130 port->removed = true; 3131 __team_port_change_send(port, false); 3132 __team_carrier_check(port->team); 3133 } 3134 3135 static void team_port_change_check(struct team_port *port, bool linkup) 3136 { 3137 ASSERT_RTNL(); 3138 3139 __team_port_change_check(port, linkup); 3140 } 3141 3142 3143 /************************************ 3144 * Net device notifier event handler 3145 ************************************/ 3146 3147 static int team_device_event(struct notifier_block *unused, 3148 unsigned long event, void *ptr) 3149 { 3150 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 3151 struct team_port *port; 3152 3153 port = team_port_get_rtnl(dev); 3154 if (!port) 3155 return NOTIFY_DONE; 3156 3157 switch (event) { 3158 case NETDEV_UP: 3159 if (netif_oper_up(dev)) 3160 team_port_change_check(port, true); 3161 break; 3162 case NETDEV_DOWN: 3163 team_port_change_check(port, false); 3164 break; 3165 case NETDEV_CHANGE: 3166 if (netif_running(port->dev)) 3167 team_port_change_check(port, 3168 !!netif_oper_up(port->dev)); 3169 break; 3170 case NETDEV_UNREGISTER: 3171 team_del_slave_on_unregister(netdev_from_priv(port->team), 3172 dev); 3173 break; 3174 case NETDEV_FEAT_CHANGE: 3175 if (!port->team->notifier_ctx) { 3176 port->team->notifier_ctx = true; 3177 netdev_compute_master_upper_features(netdev_from_priv(port->team), 3178 true); 3179 port->team->notifier_ctx = false; 3180 } 3181 break; 3182 case NETDEV_PRECHANGEMTU: 3183 /* Forbid to change mtu of underlaying device */ 3184 if (!port->team->port_mtu_change_allowed) 3185 return NOTIFY_BAD; 3186 break; 3187 case NETDEV_PRE_TYPE_CHANGE: 3188 /* Forbid to change type of underlaying device */ 3189 return NOTIFY_BAD; 3190 case NETDEV_RESEND_IGMP: 3191 /* Propagate to master device */ 3192 call_netdevice_notifiers(event, netdev_from_priv(port->team)); 3193 break; 3194 } 3195 return NOTIFY_DONE; 3196 } 3197 3198 static struct notifier_block team_notifier_block __read_mostly = { 3199 .notifier_call = team_device_event, 3200 }; 3201 3202 3203 /*********************** 3204 * Module init and exit 3205 ***********************/ 3206 3207 static int __init team_module_init(void) 3208 { 3209 int err; 3210 3211 register_netdevice_notifier(&team_notifier_block); 3212 3213 err = rtnl_link_register(&team_link_ops); 3214 if (err) 3215 goto err_rtnl_reg; 3216 3217 err = team_nl_init(); 3218 if (err) 3219 goto err_nl_init; 3220 3221 return 0; 3222 3223 err_nl_init: 3224 rtnl_link_unregister(&team_link_ops); 3225 3226 err_rtnl_reg: 3227 unregister_netdevice_notifier(&team_notifier_block); 3228 3229 return err; 3230 } 3231 3232 static void __exit team_module_exit(void) 3233 { 3234 team_nl_fini(); 3235 rtnl_link_unregister(&team_link_ops); 3236 unregister_netdevice_notifier(&team_notifier_block); 3237 } 3238 3239 module_init(team_module_init); 3240 module_exit(team_module_exit); 3241 3242 MODULE_LICENSE("GPL v2"); 3243 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>"); 3244 MODULE_DESCRIPTION("Ethernet team device driver"); 3245 MODULE_ALIAS_RTNL_LINK(DRV_NAME); 3246 MODULE_IMPORT_NS("NETDEV_INTERNAL"); 3247