1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * drivers/net/team/team.c - Network team device driver 4 * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com> 5 */ 6 7 #include <linux/ethtool.h> 8 #include <linux/kernel.h> 9 #include <linux/types.h> 10 #include <linux/module.h> 11 #include <linux/init.h> 12 #include <linux/slab.h> 13 #include <linux/rcupdate.h> 14 #include <linux/errno.h> 15 #include <linux/ctype.h> 16 #include <linux/notifier.h> 17 #include <linux/netdevice.h> 18 #include <linux/netpoll.h> 19 #include <linux/if_vlan.h> 20 #include <linux/if_arp.h> 21 #include <linux/socket.h> 22 #include <linux/etherdevice.h> 23 #include <linux/rtnetlink.h> 24 #include <net/rtnetlink.h> 25 #include <net/genetlink.h> 26 #include <net/netlink.h> 27 #include <net/sch_generic.h> 28 #include <generated/utsrelease.h> 29 #include <linux/if_team.h> 30 31 #define DRV_NAME "team" 32 33 34 /********** 35 * Helpers 36 **********/ 37 38 static struct team_port *team_port_get_rtnl(const struct net_device *dev) 39 { 40 struct team_port *port = rtnl_dereference(dev->rx_handler_data); 41 42 return netif_is_team_port(dev) ? port : NULL; 43 } 44 45 /* 46 * Since the ability to change device address for open port device is tested in 47 * team_port_add, this function can be called without control of return value 48 */ 49 static int __set_port_dev_addr(struct net_device *port_dev, 50 const unsigned char *dev_addr) 51 { 52 struct sockaddr_storage addr; 53 54 memcpy(addr.__data, dev_addr, port_dev->addr_len); 55 addr.ss_family = port_dev->type; 56 return dev_set_mac_address(port_dev, (struct sockaddr *)&addr, NULL); 57 } 58 59 static int team_port_set_orig_dev_addr(struct team_port *port) 60 { 61 return __set_port_dev_addr(port->dev, port->orig.dev_addr); 62 } 63 64 static int team_port_set_team_dev_addr(struct team *team, 65 struct team_port *port) 66 { 67 return __set_port_dev_addr(port->dev, team->dev->dev_addr); 68 } 69 70 int team_modeop_port_enter(struct team *team, struct team_port *port) 71 { 72 return team_port_set_team_dev_addr(team, port); 73 } 74 EXPORT_SYMBOL(team_modeop_port_enter); 75 76 void team_modeop_port_change_dev_addr(struct team *team, 77 struct team_port *port) 78 { 79 team_port_set_team_dev_addr(team, port); 80 } 81 EXPORT_SYMBOL(team_modeop_port_change_dev_addr); 82 83 static void team_lower_state_changed(struct team_port *port) 84 { 85 struct netdev_lag_lower_state_info info; 86 87 info.link_up = port->linkup; 88 info.tx_enabled = team_port_enabled(port); 89 netdev_lower_state_changed(port->dev, &info); 90 } 91 92 static void team_refresh_port_linkup(struct team_port *port) 93 { 94 bool new_linkup = port->user.linkup_enabled ? port->user.linkup : 95 port->state.linkup; 96 97 if (port->linkup != new_linkup) { 98 port->linkup = new_linkup; 99 team_lower_state_changed(port); 100 } 101 } 102 103 104 /******************* 105 * Options handling 106 *******************/ 107 108 struct team_option_inst { /* One for each option instance */ 109 struct list_head list; 110 struct list_head tmp_list; 111 struct team_option *option; 112 struct team_option_inst_info info; 113 bool changed; 114 bool removed; 115 }; 116 117 static struct team_option *__team_find_option(struct team *team, 118 const char *opt_name) 119 { 120 struct team_option *option; 121 122 list_for_each_entry(option, &team->option_list, list) { 123 if (strcmp(option->name, opt_name) == 0) 124 return option; 125 } 126 return NULL; 127 } 128 129 static void __team_option_inst_del(struct team_option_inst *opt_inst) 130 { 131 list_del(&opt_inst->list); 132 kfree(opt_inst); 133 } 134 135 static void __team_option_inst_del_option(struct team *team, 136 struct team_option *option) 137 { 138 struct team_option_inst *opt_inst, *tmp; 139 140 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) { 141 if (opt_inst->option == option) 142 __team_option_inst_del(opt_inst); 143 } 144 } 145 146 static int __team_option_inst_add(struct team *team, struct team_option *option, 147 struct team_port *port) 148 { 149 struct team_option_inst *opt_inst; 150 unsigned int array_size; 151 unsigned int i; 152 int err; 153 154 array_size = option->array_size; 155 if (!array_size) 156 array_size = 1; /* No array but still need one instance */ 157 158 for (i = 0; i < array_size; i++) { 159 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL); 160 if (!opt_inst) 161 return -ENOMEM; 162 opt_inst->option = option; 163 opt_inst->info.port = port; 164 opt_inst->info.array_index = i; 165 opt_inst->changed = true; 166 opt_inst->removed = false; 167 list_add_tail(&opt_inst->list, &team->option_inst_list); 168 if (option->init) { 169 err = option->init(team, &opt_inst->info); 170 if (err) 171 return err; 172 } 173 174 } 175 return 0; 176 } 177 178 static int __team_option_inst_add_option(struct team *team, 179 struct team_option *option) 180 { 181 int err; 182 183 if (!option->per_port) { 184 err = __team_option_inst_add(team, option, NULL); 185 if (err) 186 goto inst_del_option; 187 } 188 return 0; 189 190 inst_del_option: 191 __team_option_inst_del_option(team, option); 192 return err; 193 } 194 195 static void __team_option_inst_mark_removed_option(struct team *team, 196 struct team_option *option) 197 { 198 struct team_option_inst *opt_inst; 199 200 list_for_each_entry(opt_inst, &team->option_inst_list, list) { 201 if (opt_inst->option == option) { 202 opt_inst->changed = true; 203 opt_inst->removed = true; 204 } 205 } 206 } 207 208 static void __team_option_inst_del_port(struct team *team, 209 struct team_port *port) 210 { 211 struct team_option_inst *opt_inst, *tmp; 212 213 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) { 214 if (opt_inst->option->per_port && 215 opt_inst->info.port == port) 216 __team_option_inst_del(opt_inst); 217 } 218 } 219 220 static int __team_option_inst_add_port(struct team *team, 221 struct team_port *port) 222 { 223 struct team_option *option; 224 int err; 225 226 list_for_each_entry(option, &team->option_list, list) { 227 if (!option->per_port) 228 continue; 229 err = __team_option_inst_add(team, option, port); 230 if (err) 231 goto inst_del_port; 232 } 233 return 0; 234 235 inst_del_port: 236 __team_option_inst_del_port(team, port); 237 return err; 238 } 239 240 static void __team_option_inst_mark_removed_port(struct team *team, 241 struct team_port *port) 242 { 243 struct team_option_inst *opt_inst; 244 245 list_for_each_entry(opt_inst, &team->option_inst_list, list) { 246 if (opt_inst->info.port == port) { 247 opt_inst->changed = true; 248 opt_inst->removed = true; 249 } 250 } 251 } 252 253 static int __team_options_register(struct team *team, 254 const struct team_option *option, 255 size_t option_count) 256 { 257 int i; 258 struct team_option **dst_opts; 259 int err; 260 261 dst_opts = kcalloc(option_count, sizeof(struct team_option *), 262 GFP_KERNEL); 263 if (!dst_opts) 264 return -ENOMEM; 265 for (i = 0; i < option_count; i++, option++) { 266 if (__team_find_option(team, option->name)) { 267 err = -EEXIST; 268 goto alloc_rollback; 269 } 270 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL); 271 if (!dst_opts[i]) { 272 err = -ENOMEM; 273 goto alloc_rollback; 274 } 275 } 276 277 for (i = 0; i < option_count; i++) { 278 err = __team_option_inst_add_option(team, dst_opts[i]); 279 if (err) 280 goto inst_rollback; 281 list_add_tail(&dst_opts[i]->list, &team->option_list); 282 } 283 284 kfree(dst_opts); 285 return 0; 286 287 inst_rollback: 288 for (i--; i >= 0; i--) 289 __team_option_inst_del_option(team, dst_opts[i]); 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 return opt_inst->option->getter(team, ctx); 366 } 367 368 static int team_option_set(struct team *team, 369 struct team_option_inst *opt_inst, 370 struct team_gsetter_ctx *ctx) 371 { 372 if (!opt_inst->option->setter) 373 return -EOPNOTSUPP; 374 return opt_inst->option->setter(team, ctx); 375 } 376 377 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info) 378 { 379 struct team_option_inst *opt_inst; 380 381 opt_inst = container_of(opt_inst_info, struct team_option_inst, info); 382 opt_inst->changed = true; 383 } 384 EXPORT_SYMBOL(team_option_inst_set_change); 385 386 void team_options_change_check(struct team *team) 387 { 388 __team_options_change_check(team); 389 } 390 EXPORT_SYMBOL(team_options_change_check); 391 392 393 /**************** 394 * Mode handling 395 ****************/ 396 397 static LIST_HEAD(mode_list); 398 static DEFINE_SPINLOCK(mode_list_lock); 399 400 struct team_mode_item { 401 struct list_head list; 402 const struct team_mode *mode; 403 }; 404 405 static struct team_mode_item *__find_mode(const char *kind) 406 { 407 struct team_mode_item *mitem; 408 409 list_for_each_entry(mitem, &mode_list, list) { 410 if (strcmp(mitem->mode->kind, kind) == 0) 411 return mitem; 412 } 413 return NULL; 414 } 415 416 static bool is_good_mode_name(const char *name) 417 { 418 while (*name != '\0') { 419 if (!isalpha(*name) && !isdigit(*name) && *name != '_') 420 return false; 421 name++; 422 } 423 return true; 424 } 425 426 int team_mode_register(const struct team_mode *mode) 427 { 428 int err = 0; 429 struct team_mode_item *mitem; 430 431 if (!is_good_mode_name(mode->kind) || 432 mode->priv_size > TEAM_MODE_PRIV_SIZE) 433 return -EINVAL; 434 435 mitem = kmalloc(sizeof(*mitem), GFP_KERNEL); 436 if (!mitem) 437 return -ENOMEM; 438 439 spin_lock(&mode_list_lock); 440 if (__find_mode(mode->kind)) { 441 err = -EEXIST; 442 kfree(mitem); 443 goto unlock; 444 } 445 mitem->mode = mode; 446 list_add_tail(&mitem->list, &mode_list); 447 unlock: 448 spin_unlock(&mode_list_lock); 449 return err; 450 } 451 EXPORT_SYMBOL(team_mode_register); 452 453 void team_mode_unregister(const struct team_mode *mode) 454 { 455 struct team_mode_item *mitem; 456 457 spin_lock(&mode_list_lock); 458 mitem = __find_mode(mode->kind); 459 if (mitem) { 460 list_del_init(&mitem->list); 461 kfree(mitem); 462 } 463 spin_unlock(&mode_list_lock); 464 } 465 EXPORT_SYMBOL(team_mode_unregister); 466 467 static const struct team_mode *team_mode_get(const char *kind) 468 { 469 struct team_mode_item *mitem; 470 const struct team_mode *mode = NULL; 471 472 if (!try_module_get(THIS_MODULE)) 473 return NULL; 474 475 spin_lock(&mode_list_lock); 476 mitem = __find_mode(kind); 477 if (!mitem) { 478 spin_unlock(&mode_list_lock); 479 request_module("team-mode-%s", kind); 480 spin_lock(&mode_list_lock); 481 mitem = __find_mode(kind); 482 } 483 if (mitem) { 484 mode = mitem->mode; 485 if (!try_module_get(mode->owner)) 486 mode = NULL; 487 } 488 489 spin_unlock(&mode_list_lock); 490 module_put(THIS_MODULE); 491 return mode; 492 } 493 494 static void team_mode_put(const struct team_mode *mode) 495 { 496 module_put(mode->owner); 497 } 498 499 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb) 500 { 501 dev_kfree_skb_any(skb); 502 return false; 503 } 504 505 static rx_handler_result_t team_dummy_receive(struct team *team, 506 struct team_port *port, 507 struct sk_buff *skb) 508 { 509 return RX_HANDLER_ANOTHER; 510 } 511 512 static const struct team_mode __team_no_mode = { 513 .kind = "*NOMODE*", 514 }; 515 516 static bool team_is_mode_set(struct team *team) 517 { 518 return team->mode != &__team_no_mode; 519 } 520 521 static void team_set_no_mode(struct team *team) 522 { 523 team->user_carrier_enabled = false; 524 team->mode = &__team_no_mode; 525 } 526 527 static void team_adjust_ops(struct team *team) 528 { 529 /* 530 * To avoid checks in rx/tx skb paths, ensure here that non-null and 531 * correct ops are always set. 532 */ 533 534 if (!team->en_port_count || !team_is_mode_set(team) || 535 !team->mode->ops->transmit) 536 team->ops.transmit = team_dummy_transmit; 537 else 538 team->ops.transmit = team->mode->ops->transmit; 539 540 if (!team->en_port_count || !team_is_mode_set(team) || 541 !team->mode->ops->receive) 542 team->ops.receive = team_dummy_receive; 543 else 544 team->ops.receive = team->mode->ops->receive; 545 } 546 547 /* 548 * We can benefit from the fact that it's ensured no port is present 549 * at the time of mode change. Therefore no packets are in fly so there's no 550 * need to set mode operations in any special way. 551 */ 552 static int __team_change_mode(struct team *team, 553 const struct team_mode *new_mode) 554 { 555 /* Check if mode was previously set and do cleanup if so */ 556 if (team_is_mode_set(team)) { 557 void (*exit_op)(struct team *team) = team->ops.exit; 558 559 /* Clear ops area so no callback is called any longer */ 560 memset(&team->ops, 0, sizeof(struct team_mode_ops)); 561 team_adjust_ops(team); 562 563 if (exit_op) 564 exit_op(team); 565 team_mode_put(team->mode); 566 team_set_no_mode(team); 567 /* zero private data area */ 568 memset(&team->mode_priv, 0, 569 sizeof(struct team) - offsetof(struct team, mode_priv)); 570 } 571 572 if (!new_mode) 573 return 0; 574 575 if (new_mode->ops->init) { 576 int err; 577 578 err = new_mode->ops->init(team); 579 if (err) 580 return err; 581 } 582 583 team->mode = new_mode; 584 memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops)); 585 team_adjust_ops(team); 586 587 return 0; 588 } 589 590 static int team_change_mode(struct team *team, const char *kind) 591 { 592 const struct team_mode *new_mode; 593 struct net_device *dev = team->dev; 594 int err; 595 596 if (!list_empty(&team->port_list)) { 597 netdev_err(dev, "No ports can be present during mode change\n"); 598 return -EBUSY; 599 } 600 601 if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) { 602 netdev_err(dev, "Unable to change to the same mode the team is in\n"); 603 return -EINVAL; 604 } 605 606 new_mode = team_mode_get(kind); 607 if (!new_mode) { 608 netdev_err(dev, "Mode \"%s\" not found\n", kind); 609 return -EINVAL; 610 } 611 612 err = __team_change_mode(team, new_mode); 613 if (err) { 614 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind); 615 team_mode_put(new_mode); 616 return err; 617 } 618 619 netdev_info(dev, "Mode changed to \"%s\"\n", kind); 620 return 0; 621 } 622 623 624 /********************* 625 * Peers notification 626 *********************/ 627 628 static void team_notify_peers_work(struct work_struct *work) 629 { 630 struct team *team; 631 int val; 632 633 team = container_of(work, struct team, notify_peers.dw.work); 634 635 if (!rtnl_trylock()) { 636 schedule_delayed_work(&team->notify_peers.dw, 0); 637 return; 638 } 639 val = atomic_dec_if_positive(&team->notify_peers.count_pending); 640 if (val < 0) { 641 rtnl_unlock(); 642 return; 643 } 644 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev); 645 rtnl_unlock(); 646 if (val) 647 schedule_delayed_work(&team->notify_peers.dw, 648 msecs_to_jiffies(team->notify_peers.interval)); 649 } 650 651 static void team_notify_peers(struct team *team) 652 { 653 if (!team->notify_peers.count || !netif_running(team->dev)) 654 return; 655 atomic_add(team->notify_peers.count, &team->notify_peers.count_pending); 656 schedule_delayed_work(&team->notify_peers.dw, 0); 657 } 658 659 static void team_notify_peers_init(struct team *team) 660 { 661 INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work); 662 } 663 664 static void team_notify_peers_fini(struct team *team) 665 { 666 cancel_delayed_work_sync(&team->notify_peers.dw); 667 } 668 669 670 /******************************* 671 * Send multicast group rejoins 672 *******************************/ 673 674 static void team_mcast_rejoin_work(struct work_struct *work) 675 { 676 struct team *team; 677 int val; 678 679 team = container_of(work, struct team, mcast_rejoin.dw.work); 680 681 if (!rtnl_trylock()) { 682 schedule_delayed_work(&team->mcast_rejoin.dw, 0); 683 return; 684 } 685 val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending); 686 if (val < 0) { 687 rtnl_unlock(); 688 return; 689 } 690 call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev); 691 rtnl_unlock(); 692 if (val) 693 schedule_delayed_work(&team->mcast_rejoin.dw, 694 msecs_to_jiffies(team->mcast_rejoin.interval)); 695 } 696 697 static void team_mcast_rejoin(struct team *team) 698 { 699 if (!team->mcast_rejoin.count || !netif_running(team->dev)) 700 return; 701 atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending); 702 schedule_delayed_work(&team->mcast_rejoin.dw, 0); 703 } 704 705 static void team_mcast_rejoin_init(struct team *team) 706 { 707 INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work); 708 } 709 710 static void team_mcast_rejoin_fini(struct team *team) 711 { 712 cancel_delayed_work_sync(&team->mcast_rejoin.dw); 713 } 714 715 716 /************************ 717 * Rx path frame handler 718 ************************/ 719 720 /* note: already called with rcu_read_lock */ 721 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb) 722 { 723 struct sk_buff *skb = *pskb; 724 struct team_port *port; 725 struct team *team; 726 rx_handler_result_t res; 727 728 skb = skb_share_check(skb, GFP_ATOMIC); 729 if (!skb) 730 return RX_HANDLER_CONSUMED; 731 732 *pskb = skb; 733 734 port = team_port_get_rcu(skb->dev); 735 team = port->team; 736 if (!team_port_enabled(port)) { 737 if (is_link_local_ether_addr(eth_hdr(skb)->h_dest)) 738 /* link-local packets are mostly useful when stack receives them 739 * with the link they arrive on. 740 */ 741 return RX_HANDLER_PASS; 742 /* allow exact match delivery for disabled ports */ 743 res = RX_HANDLER_EXACT; 744 } else { 745 res = team->ops.receive(team, port, skb); 746 } 747 if (res == RX_HANDLER_ANOTHER) { 748 struct team_pcpu_stats *pcpu_stats; 749 750 pcpu_stats = this_cpu_ptr(team->pcpu_stats); 751 u64_stats_update_begin(&pcpu_stats->syncp); 752 u64_stats_inc(&pcpu_stats->rx_packets); 753 u64_stats_add(&pcpu_stats->rx_bytes, skb->len); 754 if (skb->pkt_type == PACKET_MULTICAST) 755 u64_stats_inc(&pcpu_stats->rx_multicast); 756 u64_stats_update_end(&pcpu_stats->syncp); 757 758 skb->dev = team->dev; 759 } else if (res == RX_HANDLER_EXACT) { 760 this_cpu_inc(team->pcpu_stats->rx_nohandler); 761 } else { 762 this_cpu_inc(team->pcpu_stats->rx_dropped); 763 } 764 765 return res; 766 } 767 768 769 /************************************* 770 * Multiqueue Tx port select override 771 *************************************/ 772 773 static int team_queue_override_init(struct team *team) 774 { 775 struct list_head *listarr; 776 unsigned int queue_cnt = team->dev->num_tx_queues - 1; 777 unsigned int i; 778 779 if (!queue_cnt) 780 return 0; 781 listarr = kmalloc_array(queue_cnt, sizeof(struct list_head), 782 GFP_KERNEL); 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->index < cur->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(team->dev, "%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_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_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 /* 931 * Enable/disable port by adding to enabled port hashlist and setting 932 * port->index (Might be racy so reader could see incorrect ifindex when 933 * processing a flying packet, but that is not a problem). Write guarded 934 * by team->lock. 935 */ 936 static void team_port_enable(struct team *team, 937 struct team_port *port) 938 { 939 if (team_port_enabled(port)) 940 return; 941 port->index = team->en_port_count++; 942 hlist_add_head_rcu(&port->hlist, 943 team_port_index_hash(team, port->index)); 944 team_adjust_ops(team); 945 team_queue_override_port_add(team, port); 946 if (team->ops.port_enabled) 947 team->ops.port_enabled(team, port); 948 team_notify_peers(team); 949 team_mcast_rejoin(team); 950 team_lower_state_changed(port); 951 } 952 953 static void __reconstruct_port_hlist(struct team *team, int rm_index) 954 { 955 int i; 956 struct team_port *port; 957 958 for (i = rm_index + 1; i < team->en_port_count; i++) { 959 port = team_get_port_by_index(team, i); 960 hlist_del_rcu(&port->hlist); 961 port->index--; 962 hlist_add_head_rcu(&port->hlist, 963 team_port_index_hash(team, port->index)); 964 } 965 } 966 967 static void team_port_disable(struct team *team, 968 struct team_port *port) 969 { 970 if (!team_port_enabled(port)) 971 return; 972 if (team->ops.port_disabled) 973 team->ops.port_disabled(team, port); 974 hlist_del_rcu(&port->hlist); 975 __reconstruct_port_hlist(team, port->index); 976 port->index = -1; 977 team->en_port_count--; 978 team_queue_override_port_del(team, port); 979 team_adjust_ops(team); 980 team_lower_state_changed(port); 981 } 982 983 #define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \ 984 NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE | \ 985 NETIF_F_HIGHDMA | NETIF_F_LRO) 986 987 #define TEAM_ENC_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \ 988 NETIF_F_RXCSUM | NETIF_F_GSO_SOFTWARE) 989 990 static void __team_compute_features(struct team *team) 991 { 992 struct team_port *port; 993 netdev_features_t vlan_features = TEAM_VLAN_FEATURES & 994 NETIF_F_ALL_FOR_ALL; 995 netdev_features_t enc_features = TEAM_ENC_FEATURES; 996 unsigned short max_hard_header_len = ETH_HLEN; 997 unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE | 998 IFF_XMIT_DST_RELEASE_PERM; 999 1000 rcu_read_lock(); 1001 list_for_each_entry_rcu(port, &team->port_list, list) { 1002 vlan_features = netdev_increment_features(vlan_features, 1003 port->dev->vlan_features, 1004 TEAM_VLAN_FEATURES); 1005 enc_features = 1006 netdev_increment_features(enc_features, 1007 port->dev->hw_enc_features, 1008 TEAM_ENC_FEATURES); 1009 1010 1011 dst_release_flag &= port->dev->priv_flags; 1012 if (port->dev->hard_header_len > max_hard_header_len) 1013 max_hard_header_len = port->dev->hard_header_len; 1014 } 1015 rcu_read_unlock(); 1016 1017 team->dev->vlan_features = vlan_features; 1018 team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL | 1019 NETIF_F_HW_VLAN_CTAG_TX | 1020 NETIF_F_HW_VLAN_STAG_TX; 1021 team->dev->hard_header_len = max_hard_header_len; 1022 1023 team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; 1024 if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM)) 1025 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE; 1026 } 1027 1028 static void team_compute_features(struct team *team) 1029 { 1030 __team_compute_features(team); 1031 netdev_change_features(team->dev); 1032 } 1033 1034 static int team_port_enter(struct team *team, struct team_port *port) 1035 { 1036 int err = 0; 1037 1038 dev_hold(team->dev); 1039 if (team->ops.port_enter) { 1040 err = team->ops.port_enter(team, port); 1041 if (err) { 1042 netdev_err(team->dev, "Device %s failed to enter team mode\n", 1043 port->dev->name); 1044 goto err_port_enter; 1045 } 1046 } 1047 1048 return 0; 1049 1050 err_port_enter: 1051 dev_put(team->dev); 1052 1053 return err; 1054 } 1055 1056 static void team_port_leave(struct team *team, struct team_port *port) 1057 { 1058 if (team->ops.port_leave) 1059 team->ops.port_leave(team, port); 1060 dev_put(team->dev); 1061 } 1062 1063 #ifdef CONFIG_NET_POLL_CONTROLLER 1064 static int __team_port_enable_netpoll(struct team_port *port) 1065 { 1066 struct netpoll *np; 1067 int err; 1068 1069 np = kzalloc(sizeof(*np), GFP_KERNEL); 1070 if (!np) 1071 return -ENOMEM; 1072 1073 err = __netpoll_setup(np, port->dev); 1074 if (err) { 1075 kfree(np); 1076 return err; 1077 } 1078 port->np = np; 1079 return err; 1080 } 1081 1082 static int team_port_enable_netpoll(struct team_port *port) 1083 { 1084 if (!port->team->dev->npinfo) 1085 return 0; 1086 1087 return __team_port_enable_netpoll(port); 1088 } 1089 1090 static void team_port_disable_netpoll(struct team_port *port) 1091 { 1092 struct netpoll *np = port->np; 1093 1094 if (!np) 1095 return; 1096 port->np = NULL; 1097 1098 __netpoll_free(np); 1099 } 1100 #else 1101 static int team_port_enable_netpoll(struct team_port *port) 1102 { 1103 return 0; 1104 } 1105 static void team_port_disable_netpoll(struct team_port *port) 1106 { 1107 } 1108 #endif 1109 1110 static int team_upper_dev_link(struct team *team, struct team_port *port, 1111 struct netlink_ext_ack *extack) 1112 { 1113 struct netdev_lag_upper_info lag_upper_info; 1114 int err; 1115 1116 lag_upper_info.tx_type = team->mode->lag_tx_type; 1117 lag_upper_info.hash_type = NETDEV_LAG_HASH_UNKNOWN; 1118 err = netdev_master_upper_dev_link(port->dev, team->dev, NULL, 1119 &lag_upper_info, extack); 1120 if (err) 1121 return err; 1122 port->dev->priv_flags |= IFF_TEAM_PORT; 1123 return 0; 1124 } 1125 1126 static void team_upper_dev_unlink(struct team *team, struct team_port *port) 1127 { 1128 netdev_upper_dev_unlink(port->dev, team->dev); 1129 port->dev->priv_flags &= ~IFF_TEAM_PORT; 1130 } 1131 1132 static void __team_port_change_port_added(struct team_port *port, bool linkup); 1133 static int team_dev_type_check_change(struct net_device *dev, 1134 struct net_device *port_dev); 1135 1136 static int team_port_add(struct team *team, struct net_device *port_dev, 1137 struct netlink_ext_ack *extack) 1138 { 1139 struct net_device *dev = team->dev; 1140 struct team_port *port; 1141 char *portname = port_dev->name; 1142 int err; 1143 1144 if (port_dev->flags & IFF_LOOPBACK) { 1145 NL_SET_ERR_MSG(extack, "Loopback device can't be added as a team port"); 1146 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n", 1147 portname); 1148 return -EINVAL; 1149 } 1150 1151 if (netif_is_team_port(port_dev)) { 1152 NL_SET_ERR_MSG(extack, "Device is already a port of a team device"); 1153 netdev_err(dev, "Device %s is already a port " 1154 "of a team device\n", portname); 1155 return -EBUSY; 1156 } 1157 1158 if (dev == port_dev) { 1159 NL_SET_ERR_MSG(extack, "Cannot enslave team device to itself"); 1160 netdev_err(dev, "Cannot enslave team device to itself\n"); 1161 return -EINVAL; 1162 } 1163 1164 if (netdev_has_upper_dev(dev, port_dev)) { 1165 NL_SET_ERR_MSG(extack, "Device is already an upper device of the team interface"); 1166 netdev_err(dev, "Device %s is already an upper device of the team interface\n", 1167 portname); 1168 return -EBUSY; 1169 } 1170 1171 if (port_dev->features & NETIF_F_VLAN_CHALLENGED && 1172 vlan_uses_dev(dev)) { 1173 NL_SET_ERR_MSG(extack, "Device is VLAN challenged and team device has VLAN set up"); 1174 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n", 1175 portname); 1176 return -EPERM; 1177 } 1178 1179 err = team_dev_type_check_change(dev, port_dev); 1180 if (err) 1181 return err; 1182 1183 if (port_dev->flags & IFF_UP) { 1184 NL_SET_ERR_MSG(extack, "Device is up. Set it down before adding it as a team port"); 1185 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n", 1186 portname); 1187 return -EBUSY; 1188 } 1189 1190 port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size, 1191 GFP_KERNEL); 1192 if (!port) 1193 return -ENOMEM; 1194 1195 port->dev = port_dev; 1196 port->team = team; 1197 INIT_LIST_HEAD(&port->qom_list); 1198 1199 port->orig.mtu = port_dev->mtu; 1200 err = dev_set_mtu(port_dev, dev->mtu); 1201 if (err) { 1202 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err); 1203 goto err_set_mtu; 1204 } 1205 1206 memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len); 1207 1208 err = team_port_enter(team, port); 1209 if (err) { 1210 netdev_err(dev, "Device %s failed to enter team mode\n", 1211 portname); 1212 goto err_port_enter; 1213 } 1214 1215 err = dev_open(port_dev, extack); 1216 if (err) { 1217 netdev_dbg(dev, "Device %s opening failed\n", 1218 portname); 1219 goto err_dev_open; 1220 } 1221 1222 err = vlan_vids_add_by_dev(port_dev, dev); 1223 if (err) { 1224 netdev_err(dev, "Failed to add vlan ids to device %s\n", 1225 portname); 1226 goto err_vids_add; 1227 } 1228 1229 err = team_port_enable_netpoll(port); 1230 if (err) { 1231 netdev_err(dev, "Failed to enable netpoll on device %s\n", 1232 portname); 1233 goto err_enable_netpoll; 1234 } 1235 1236 if (!(dev->features & NETIF_F_LRO)) 1237 dev_disable_lro(port_dev); 1238 1239 err = netdev_rx_handler_register(port_dev, team_handle_frame, 1240 port); 1241 if (err) { 1242 netdev_err(dev, "Device %s failed to register rx_handler\n", 1243 portname); 1244 goto err_handler_register; 1245 } 1246 1247 err = team_upper_dev_link(team, port, extack); 1248 if (err) { 1249 netdev_err(dev, "Device %s failed to set upper link\n", 1250 portname); 1251 goto err_set_upper_link; 1252 } 1253 1254 err = __team_option_inst_add_port(team, port); 1255 if (err) { 1256 netdev_err(dev, "Device %s failed to add per-port options\n", 1257 portname); 1258 goto err_option_port_add; 1259 } 1260 1261 /* set promiscuity level to new slave */ 1262 if (dev->flags & IFF_PROMISC) { 1263 err = dev_set_promiscuity(port_dev, 1); 1264 if (err) 1265 goto err_set_slave_promisc; 1266 } 1267 1268 /* set allmulti level to new slave */ 1269 if (dev->flags & IFF_ALLMULTI) { 1270 err = dev_set_allmulti(port_dev, 1); 1271 if (err) { 1272 if (dev->flags & IFF_PROMISC) 1273 dev_set_promiscuity(port_dev, -1); 1274 goto err_set_slave_promisc; 1275 } 1276 } 1277 1278 if (dev->flags & IFF_UP) { 1279 netif_addr_lock_bh(dev); 1280 dev_uc_sync_multiple(port_dev, dev); 1281 dev_mc_sync_multiple(port_dev, dev); 1282 netif_addr_unlock_bh(dev); 1283 } 1284 1285 port->index = -1; 1286 list_add_tail_rcu(&port->list, &team->port_list); 1287 team_port_enable(team, port); 1288 __team_compute_features(team); 1289 __team_port_change_port_added(port, !!netif_oper_up(port_dev)); 1290 __team_options_change_check(team); 1291 1292 netdev_info(dev, "Port device %s added\n", portname); 1293 1294 return 0; 1295 1296 err_set_slave_promisc: 1297 __team_option_inst_del_port(team, port); 1298 1299 err_option_port_add: 1300 team_upper_dev_unlink(team, port); 1301 1302 err_set_upper_link: 1303 netdev_rx_handler_unregister(port_dev); 1304 1305 err_handler_register: 1306 team_port_disable_netpoll(port); 1307 1308 err_enable_netpoll: 1309 vlan_vids_del_by_dev(port_dev, dev); 1310 1311 err_vids_add: 1312 dev_close(port_dev); 1313 1314 err_dev_open: 1315 team_port_leave(team, port); 1316 team_port_set_orig_dev_addr(port); 1317 1318 err_port_enter: 1319 dev_set_mtu(port_dev, port->orig.mtu); 1320 1321 err_set_mtu: 1322 kfree(port); 1323 1324 return err; 1325 } 1326 1327 static void __team_port_change_port_removed(struct team_port *port); 1328 1329 static int team_port_del(struct team *team, struct net_device *port_dev) 1330 { 1331 struct net_device *dev = team->dev; 1332 struct team_port *port; 1333 char *portname = port_dev->name; 1334 1335 port = team_port_get_rtnl(port_dev); 1336 if (!port || !team_port_find(team, port)) { 1337 netdev_err(dev, "Device %s does not act as a port of this team\n", 1338 portname); 1339 return -ENOENT; 1340 } 1341 1342 team_port_disable(team, port); 1343 list_del_rcu(&port->list); 1344 1345 if (dev->flags & IFF_PROMISC) 1346 dev_set_promiscuity(port_dev, -1); 1347 if (dev->flags & IFF_ALLMULTI) 1348 dev_set_allmulti(port_dev, -1); 1349 1350 team_upper_dev_unlink(team, port); 1351 netdev_rx_handler_unregister(port_dev); 1352 team_port_disable_netpoll(port); 1353 vlan_vids_del_by_dev(port_dev, dev); 1354 if (dev->flags & IFF_UP) { 1355 dev_uc_unsync(port_dev, dev); 1356 dev_mc_unsync(port_dev, dev); 1357 } 1358 dev_close(port_dev); 1359 team_port_leave(team, port); 1360 1361 __team_option_inst_mark_removed_port(team, port); 1362 __team_options_change_check(team); 1363 __team_option_inst_del_port(team, port); 1364 __team_port_change_port_removed(port); 1365 1366 team_port_set_orig_dev_addr(port); 1367 dev_set_mtu(port_dev, port->orig.mtu); 1368 kfree_rcu(port, rcu); 1369 netdev_info(dev, "Port device %s removed\n", portname); 1370 __team_compute_features(team); 1371 1372 return 0; 1373 } 1374 1375 1376 /***************** 1377 * Net device ops 1378 *****************/ 1379 1380 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx) 1381 { 1382 ctx->data.str_val = team->mode->kind; 1383 return 0; 1384 } 1385 1386 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx) 1387 { 1388 return team_change_mode(team, ctx->data.str_val); 1389 } 1390 1391 static int team_notify_peers_count_get(struct team *team, 1392 struct team_gsetter_ctx *ctx) 1393 { 1394 ctx->data.u32_val = team->notify_peers.count; 1395 return 0; 1396 } 1397 1398 static int team_notify_peers_count_set(struct team *team, 1399 struct team_gsetter_ctx *ctx) 1400 { 1401 team->notify_peers.count = ctx->data.u32_val; 1402 return 0; 1403 } 1404 1405 static int team_notify_peers_interval_get(struct team *team, 1406 struct team_gsetter_ctx *ctx) 1407 { 1408 ctx->data.u32_val = team->notify_peers.interval; 1409 return 0; 1410 } 1411 1412 static int team_notify_peers_interval_set(struct team *team, 1413 struct team_gsetter_ctx *ctx) 1414 { 1415 team->notify_peers.interval = ctx->data.u32_val; 1416 return 0; 1417 } 1418 1419 static int team_mcast_rejoin_count_get(struct team *team, 1420 struct team_gsetter_ctx *ctx) 1421 { 1422 ctx->data.u32_val = team->mcast_rejoin.count; 1423 return 0; 1424 } 1425 1426 static int team_mcast_rejoin_count_set(struct team *team, 1427 struct team_gsetter_ctx *ctx) 1428 { 1429 team->mcast_rejoin.count = ctx->data.u32_val; 1430 return 0; 1431 } 1432 1433 static int team_mcast_rejoin_interval_get(struct team *team, 1434 struct team_gsetter_ctx *ctx) 1435 { 1436 ctx->data.u32_val = team->mcast_rejoin.interval; 1437 return 0; 1438 } 1439 1440 static int team_mcast_rejoin_interval_set(struct team *team, 1441 struct team_gsetter_ctx *ctx) 1442 { 1443 team->mcast_rejoin.interval = ctx->data.u32_val; 1444 return 0; 1445 } 1446 1447 static int team_port_en_option_get(struct team *team, 1448 struct team_gsetter_ctx *ctx) 1449 { 1450 struct team_port *port = ctx->info->port; 1451 1452 ctx->data.bool_val = team_port_enabled(port); 1453 return 0; 1454 } 1455 1456 static int team_port_en_option_set(struct team *team, 1457 struct team_gsetter_ctx *ctx) 1458 { 1459 struct team_port *port = ctx->info->port; 1460 1461 if (ctx->data.bool_val) 1462 team_port_enable(team, port); 1463 else 1464 team_port_disable(team, port); 1465 return 0; 1466 } 1467 1468 static int team_user_linkup_option_get(struct team *team, 1469 struct team_gsetter_ctx *ctx) 1470 { 1471 struct team_port *port = ctx->info->port; 1472 1473 ctx->data.bool_val = port->user.linkup; 1474 return 0; 1475 } 1476 1477 static void __team_carrier_check(struct team *team); 1478 1479 static int team_user_linkup_option_set(struct team *team, 1480 struct team_gsetter_ctx *ctx) 1481 { 1482 struct team_port *port = ctx->info->port; 1483 1484 port->user.linkup = ctx->data.bool_val; 1485 team_refresh_port_linkup(port); 1486 __team_carrier_check(port->team); 1487 return 0; 1488 } 1489 1490 static int team_user_linkup_en_option_get(struct team *team, 1491 struct team_gsetter_ctx *ctx) 1492 { 1493 struct team_port *port = ctx->info->port; 1494 1495 ctx->data.bool_val = port->user.linkup_enabled; 1496 return 0; 1497 } 1498 1499 static int team_user_linkup_en_option_set(struct team *team, 1500 struct team_gsetter_ctx *ctx) 1501 { 1502 struct team_port *port = ctx->info->port; 1503 1504 port->user.linkup_enabled = ctx->data.bool_val; 1505 team_refresh_port_linkup(port); 1506 __team_carrier_check(port->team); 1507 return 0; 1508 } 1509 1510 static int team_priority_option_get(struct team *team, 1511 struct team_gsetter_ctx *ctx) 1512 { 1513 struct team_port *port = ctx->info->port; 1514 1515 ctx->data.s32_val = port->priority; 1516 return 0; 1517 } 1518 1519 static int team_priority_option_set(struct team *team, 1520 struct team_gsetter_ctx *ctx) 1521 { 1522 struct team_port *port = ctx->info->port; 1523 s32 priority = ctx->data.s32_val; 1524 1525 if (port->priority == priority) 1526 return 0; 1527 port->priority = priority; 1528 team_queue_override_port_prio_changed(team, port); 1529 return 0; 1530 } 1531 1532 static int team_queue_id_option_get(struct team *team, 1533 struct team_gsetter_ctx *ctx) 1534 { 1535 struct team_port *port = ctx->info->port; 1536 1537 ctx->data.u32_val = port->queue_id; 1538 return 0; 1539 } 1540 1541 static int team_queue_id_option_set(struct team *team, 1542 struct team_gsetter_ctx *ctx) 1543 { 1544 struct team_port *port = ctx->info->port; 1545 u16 new_queue_id = ctx->data.u32_val; 1546 1547 if (port->queue_id == new_queue_id) 1548 return 0; 1549 if (new_queue_id >= team->dev->real_num_tx_queues) 1550 return -EINVAL; 1551 team_queue_override_port_change_queue_id(team, port, new_queue_id); 1552 return 0; 1553 } 1554 1555 static const struct team_option team_options[] = { 1556 { 1557 .name = "mode", 1558 .type = TEAM_OPTION_TYPE_STRING, 1559 .getter = team_mode_option_get, 1560 .setter = team_mode_option_set, 1561 }, 1562 { 1563 .name = "notify_peers_count", 1564 .type = TEAM_OPTION_TYPE_U32, 1565 .getter = team_notify_peers_count_get, 1566 .setter = team_notify_peers_count_set, 1567 }, 1568 { 1569 .name = "notify_peers_interval", 1570 .type = TEAM_OPTION_TYPE_U32, 1571 .getter = team_notify_peers_interval_get, 1572 .setter = team_notify_peers_interval_set, 1573 }, 1574 { 1575 .name = "mcast_rejoin_count", 1576 .type = TEAM_OPTION_TYPE_U32, 1577 .getter = team_mcast_rejoin_count_get, 1578 .setter = team_mcast_rejoin_count_set, 1579 }, 1580 { 1581 .name = "mcast_rejoin_interval", 1582 .type = TEAM_OPTION_TYPE_U32, 1583 .getter = team_mcast_rejoin_interval_get, 1584 .setter = team_mcast_rejoin_interval_set, 1585 }, 1586 { 1587 .name = "enabled", 1588 .type = TEAM_OPTION_TYPE_BOOL, 1589 .per_port = true, 1590 .getter = team_port_en_option_get, 1591 .setter = team_port_en_option_set, 1592 }, 1593 { 1594 .name = "user_linkup", 1595 .type = TEAM_OPTION_TYPE_BOOL, 1596 .per_port = true, 1597 .getter = team_user_linkup_option_get, 1598 .setter = team_user_linkup_option_set, 1599 }, 1600 { 1601 .name = "user_linkup_enabled", 1602 .type = TEAM_OPTION_TYPE_BOOL, 1603 .per_port = true, 1604 .getter = team_user_linkup_en_option_get, 1605 .setter = team_user_linkup_en_option_set, 1606 }, 1607 { 1608 .name = "priority", 1609 .type = TEAM_OPTION_TYPE_S32, 1610 .per_port = true, 1611 .getter = team_priority_option_get, 1612 .setter = team_priority_option_set, 1613 }, 1614 { 1615 .name = "queue_id", 1616 .type = TEAM_OPTION_TYPE_U32, 1617 .per_port = true, 1618 .getter = team_queue_id_option_get, 1619 .setter = team_queue_id_option_set, 1620 }, 1621 }; 1622 1623 1624 static int team_init(struct net_device *dev) 1625 { 1626 struct team *team = netdev_priv(dev); 1627 int i; 1628 int err; 1629 1630 team->dev = dev; 1631 team_set_no_mode(team); 1632 1633 team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats); 1634 if (!team->pcpu_stats) 1635 return -ENOMEM; 1636 1637 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++) 1638 INIT_HLIST_HEAD(&team->en_port_hlist[i]); 1639 INIT_LIST_HEAD(&team->port_list); 1640 err = team_queue_override_init(team); 1641 if (err) 1642 goto err_team_queue_override_init; 1643 1644 team_adjust_ops(team); 1645 1646 INIT_LIST_HEAD(&team->option_list); 1647 INIT_LIST_HEAD(&team->option_inst_list); 1648 1649 team_notify_peers_init(team); 1650 team_mcast_rejoin_init(team); 1651 1652 err = team_options_register(team, team_options, ARRAY_SIZE(team_options)); 1653 if (err) 1654 goto err_options_register; 1655 netif_carrier_off(dev); 1656 1657 lockdep_register_key(&team->team_lock_key); 1658 __mutex_init(&team->lock, "team->team_lock_key", &team->team_lock_key); 1659 netdev_lockdep_set_classes(dev); 1660 1661 return 0; 1662 1663 err_options_register: 1664 team_mcast_rejoin_fini(team); 1665 team_notify_peers_fini(team); 1666 team_queue_override_fini(team); 1667 err_team_queue_override_init: 1668 free_percpu(team->pcpu_stats); 1669 1670 return err; 1671 } 1672 1673 static void team_uninit(struct net_device *dev) 1674 { 1675 struct team *team = netdev_priv(dev); 1676 struct team_port *port; 1677 struct team_port *tmp; 1678 1679 mutex_lock(&team->lock); 1680 list_for_each_entry_safe(port, tmp, &team->port_list, list) 1681 team_port_del(team, port->dev); 1682 1683 __team_change_mode(team, NULL); /* cleanup */ 1684 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options)); 1685 team_mcast_rejoin_fini(team); 1686 team_notify_peers_fini(team); 1687 team_queue_override_fini(team); 1688 mutex_unlock(&team->lock); 1689 netdev_change_features(dev); 1690 lockdep_unregister_key(&team->team_lock_key); 1691 } 1692 1693 static void team_destructor(struct net_device *dev) 1694 { 1695 struct team *team = netdev_priv(dev); 1696 1697 free_percpu(team->pcpu_stats); 1698 } 1699 1700 static int team_open(struct net_device *dev) 1701 { 1702 return 0; 1703 } 1704 1705 static int team_close(struct net_device *dev) 1706 { 1707 struct team *team = netdev_priv(dev); 1708 struct team_port *port; 1709 1710 list_for_each_entry(port, &team->port_list, list) { 1711 dev_uc_unsync(port->dev, dev); 1712 dev_mc_unsync(port->dev, dev); 1713 } 1714 1715 return 0; 1716 } 1717 1718 /* 1719 * note: already called with rcu_read_lock 1720 */ 1721 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev) 1722 { 1723 struct team *team = netdev_priv(dev); 1724 bool tx_success; 1725 unsigned int len = skb->len; 1726 1727 tx_success = team_queue_override_transmit(team, skb); 1728 if (!tx_success) 1729 tx_success = team->ops.transmit(team, skb); 1730 if (tx_success) { 1731 struct team_pcpu_stats *pcpu_stats; 1732 1733 pcpu_stats = this_cpu_ptr(team->pcpu_stats); 1734 u64_stats_update_begin(&pcpu_stats->syncp); 1735 u64_stats_inc(&pcpu_stats->tx_packets); 1736 u64_stats_add(&pcpu_stats->tx_bytes, len); 1737 u64_stats_update_end(&pcpu_stats->syncp); 1738 } else { 1739 this_cpu_inc(team->pcpu_stats->tx_dropped); 1740 } 1741 1742 return NETDEV_TX_OK; 1743 } 1744 1745 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb, 1746 struct net_device *sb_dev) 1747 { 1748 /* 1749 * This helper function exists to help dev_pick_tx get the correct 1750 * destination queue. Using a helper function skips a call to 1751 * skb_tx_hash and will put the skbs in the queue we expect on their 1752 * way down to the team driver. 1753 */ 1754 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0; 1755 1756 /* 1757 * Save the original txq to restore before passing to the driver 1758 */ 1759 qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping; 1760 1761 if (unlikely(txq >= dev->real_num_tx_queues)) { 1762 do { 1763 txq -= dev->real_num_tx_queues; 1764 } while (txq >= dev->real_num_tx_queues); 1765 } 1766 return txq; 1767 } 1768 1769 static void team_change_rx_flags(struct net_device *dev, int change) 1770 { 1771 struct team *team = netdev_priv(dev); 1772 struct team_port *port; 1773 int inc; 1774 1775 rcu_read_lock(); 1776 list_for_each_entry_rcu(port, &team->port_list, list) { 1777 if (change & IFF_PROMISC) { 1778 inc = dev->flags & IFF_PROMISC ? 1 : -1; 1779 dev_set_promiscuity(port->dev, inc); 1780 } 1781 if (change & IFF_ALLMULTI) { 1782 inc = dev->flags & IFF_ALLMULTI ? 1 : -1; 1783 dev_set_allmulti(port->dev, inc); 1784 } 1785 } 1786 rcu_read_unlock(); 1787 } 1788 1789 static void team_set_rx_mode(struct net_device *dev) 1790 { 1791 struct team *team = netdev_priv(dev); 1792 struct team_port *port; 1793 1794 rcu_read_lock(); 1795 list_for_each_entry_rcu(port, &team->port_list, list) { 1796 dev_uc_sync_multiple(port->dev, dev); 1797 dev_mc_sync_multiple(port->dev, dev); 1798 } 1799 rcu_read_unlock(); 1800 } 1801 1802 static int team_set_mac_address(struct net_device *dev, void *p) 1803 { 1804 struct sockaddr *addr = p; 1805 struct team *team = netdev_priv(dev); 1806 struct team_port *port; 1807 1808 if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data)) 1809 return -EADDRNOTAVAIL; 1810 dev_addr_set(dev, addr->sa_data); 1811 mutex_lock(&team->lock); 1812 list_for_each_entry(port, &team->port_list, list) 1813 if (team->ops.port_change_dev_addr) 1814 team->ops.port_change_dev_addr(team, port); 1815 mutex_unlock(&team->lock); 1816 return 0; 1817 } 1818 1819 static int team_change_mtu(struct net_device *dev, int new_mtu) 1820 { 1821 struct team *team = netdev_priv(dev); 1822 struct team_port *port; 1823 int err; 1824 1825 /* 1826 * Alhough this is reader, it's guarded by team lock. It's not possible 1827 * to traverse list in reverse under rcu_read_lock 1828 */ 1829 mutex_lock(&team->lock); 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 mutex_unlock(&team->lock); 1841 1842 dev->mtu = new_mtu; 1843 1844 return 0; 1845 1846 unwind: 1847 list_for_each_entry_continue_reverse(port, &team->port_list, list) 1848 dev_set_mtu(port->dev, dev->mtu); 1849 team->port_mtu_change_allowed = false; 1850 mutex_unlock(&team->lock); 1851 1852 return err; 1853 } 1854 1855 static void 1856 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 1857 { 1858 struct team *team = netdev_priv(dev); 1859 struct team_pcpu_stats *p; 1860 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes; 1861 u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0; 1862 unsigned int start; 1863 int i; 1864 1865 for_each_possible_cpu(i) { 1866 p = per_cpu_ptr(team->pcpu_stats, i); 1867 do { 1868 start = u64_stats_fetch_begin_irq(&p->syncp); 1869 rx_packets = u64_stats_read(&p->rx_packets); 1870 rx_bytes = u64_stats_read(&p->rx_bytes); 1871 rx_multicast = u64_stats_read(&p->rx_multicast); 1872 tx_packets = u64_stats_read(&p->tx_packets); 1873 tx_bytes = u64_stats_read(&p->tx_bytes); 1874 } while (u64_stats_fetch_retry_irq(&p->syncp, start)); 1875 1876 stats->rx_packets += rx_packets; 1877 stats->rx_bytes += rx_bytes; 1878 stats->multicast += rx_multicast; 1879 stats->tx_packets += tx_packets; 1880 stats->tx_bytes += tx_bytes; 1881 /* 1882 * rx_dropped, tx_dropped & rx_nohandler are u32, 1883 * updated without syncp protection. 1884 */ 1885 rx_dropped += READ_ONCE(p->rx_dropped); 1886 tx_dropped += READ_ONCE(p->tx_dropped); 1887 rx_nohandler += READ_ONCE(p->rx_nohandler); 1888 } 1889 stats->rx_dropped = rx_dropped; 1890 stats->tx_dropped = tx_dropped; 1891 stats->rx_nohandler = rx_nohandler; 1892 } 1893 1894 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) 1895 { 1896 struct team *team = netdev_priv(dev); 1897 struct team_port *port; 1898 int err; 1899 1900 /* 1901 * Alhough this is reader, it's guarded by team lock. It's not possible 1902 * to traverse list in reverse under rcu_read_lock 1903 */ 1904 mutex_lock(&team->lock); 1905 list_for_each_entry(port, &team->port_list, list) { 1906 err = vlan_vid_add(port->dev, proto, vid); 1907 if (err) 1908 goto unwind; 1909 } 1910 mutex_unlock(&team->lock); 1911 1912 return 0; 1913 1914 unwind: 1915 list_for_each_entry_continue_reverse(port, &team->port_list, list) 1916 vlan_vid_del(port->dev, proto, vid); 1917 mutex_unlock(&team->lock); 1918 1919 return err; 1920 } 1921 1922 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid) 1923 { 1924 struct team *team = netdev_priv(dev); 1925 struct team_port *port; 1926 1927 mutex_lock(&team->lock); 1928 list_for_each_entry(port, &team->port_list, list) 1929 vlan_vid_del(port->dev, proto, vid); 1930 mutex_unlock(&team->lock); 1931 1932 return 0; 1933 } 1934 1935 #ifdef CONFIG_NET_POLL_CONTROLLER 1936 static void team_poll_controller(struct net_device *dev) 1937 { 1938 } 1939 1940 static void __team_netpoll_cleanup(struct team *team) 1941 { 1942 struct team_port *port; 1943 1944 list_for_each_entry(port, &team->port_list, list) 1945 team_port_disable_netpoll(port); 1946 } 1947 1948 static void team_netpoll_cleanup(struct net_device *dev) 1949 { 1950 struct team *team = netdev_priv(dev); 1951 1952 mutex_lock(&team->lock); 1953 __team_netpoll_cleanup(team); 1954 mutex_unlock(&team->lock); 1955 } 1956 1957 static int team_netpoll_setup(struct net_device *dev, 1958 struct netpoll_info *npifo) 1959 { 1960 struct team *team = netdev_priv(dev); 1961 struct team_port *port; 1962 int err = 0; 1963 1964 mutex_lock(&team->lock); 1965 list_for_each_entry(port, &team->port_list, list) { 1966 err = __team_port_enable_netpoll(port); 1967 if (err) { 1968 __team_netpoll_cleanup(team); 1969 break; 1970 } 1971 } 1972 mutex_unlock(&team->lock); 1973 return err; 1974 } 1975 #endif 1976 1977 static int team_add_slave(struct net_device *dev, struct net_device *port_dev, 1978 struct netlink_ext_ack *extack) 1979 { 1980 struct team *team = netdev_priv(dev); 1981 int err; 1982 1983 mutex_lock(&team->lock); 1984 err = team_port_add(team, port_dev, extack); 1985 mutex_unlock(&team->lock); 1986 1987 if (!err) 1988 netdev_change_features(dev); 1989 1990 return err; 1991 } 1992 1993 static int team_del_slave(struct net_device *dev, struct net_device *port_dev) 1994 { 1995 struct team *team = netdev_priv(dev); 1996 int err; 1997 1998 mutex_lock(&team->lock); 1999 err = team_port_del(team, port_dev); 2000 mutex_unlock(&team->lock); 2001 2002 if (err) 2003 return err; 2004 2005 if (netif_is_team_master(port_dev)) { 2006 lockdep_unregister_key(&team->team_lock_key); 2007 lockdep_register_key(&team->team_lock_key); 2008 lockdep_set_class(&team->lock, &team->team_lock_key); 2009 } 2010 netdev_change_features(dev); 2011 2012 return err; 2013 } 2014 2015 static netdev_features_t team_fix_features(struct net_device *dev, 2016 netdev_features_t features) 2017 { 2018 struct team_port *port; 2019 struct team *team = netdev_priv(dev); 2020 netdev_features_t mask; 2021 2022 mask = features; 2023 features &= ~NETIF_F_ONE_FOR_ALL; 2024 features |= NETIF_F_ALL_FOR_ALL; 2025 2026 rcu_read_lock(); 2027 list_for_each_entry_rcu(port, &team->port_list, list) { 2028 features = netdev_increment_features(features, 2029 port->dev->features, 2030 mask); 2031 } 2032 rcu_read_unlock(); 2033 2034 features = netdev_add_tso_features(features, mask); 2035 2036 return features; 2037 } 2038 2039 static int team_change_carrier(struct net_device *dev, bool new_carrier) 2040 { 2041 struct team *team = netdev_priv(dev); 2042 2043 team->user_carrier_enabled = true; 2044 2045 if (new_carrier) 2046 netif_carrier_on(dev); 2047 else 2048 netif_carrier_off(dev); 2049 return 0; 2050 } 2051 2052 static const struct net_device_ops team_netdev_ops = { 2053 .ndo_init = team_init, 2054 .ndo_uninit = team_uninit, 2055 .ndo_open = team_open, 2056 .ndo_stop = team_close, 2057 .ndo_start_xmit = team_xmit, 2058 .ndo_select_queue = team_select_queue, 2059 .ndo_change_rx_flags = team_change_rx_flags, 2060 .ndo_set_rx_mode = team_set_rx_mode, 2061 .ndo_set_mac_address = team_set_mac_address, 2062 .ndo_change_mtu = team_change_mtu, 2063 .ndo_get_stats64 = team_get_stats64, 2064 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid, 2065 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid, 2066 #ifdef CONFIG_NET_POLL_CONTROLLER 2067 .ndo_poll_controller = team_poll_controller, 2068 .ndo_netpoll_setup = team_netpoll_setup, 2069 .ndo_netpoll_cleanup = team_netpoll_cleanup, 2070 #endif 2071 .ndo_add_slave = team_add_slave, 2072 .ndo_del_slave = team_del_slave, 2073 .ndo_fix_features = team_fix_features, 2074 .ndo_change_carrier = team_change_carrier, 2075 .ndo_features_check = passthru_features_check, 2076 }; 2077 2078 /*********************** 2079 * ethtool interface 2080 ***********************/ 2081 2082 static void team_ethtool_get_drvinfo(struct net_device *dev, 2083 struct ethtool_drvinfo *drvinfo) 2084 { 2085 strscpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver)); 2086 strscpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version)); 2087 } 2088 2089 static int team_ethtool_get_link_ksettings(struct net_device *dev, 2090 struct ethtool_link_ksettings *cmd) 2091 { 2092 struct team *team= netdev_priv(dev); 2093 unsigned long speed = 0; 2094 struct team_port *port; 2095 2096 cmd->base.duplex = DUPLEX_UNKNOWN; 2097 cmd->base.port = PORT_OTHER; 2098 2099 rcu_read_lock(); 2100 list_for_each_entry_rcu(port, &team->port_list, list) { 2101 if (team_port_txable(port)) { 2102 if (port->state.speed != SPEED_UNKNOWN) 2103 speed += port->state.speed; 2104 if (cmd->base.duplex == DUPLEX_UNKNOWN && 2105 port->state.duplex != DUPLEX_UNKNOWN) 2106 cmd->base.duplex = port->state.duplex; 2107 } 2108 } 2109 rcu_read_unlock(); 2110 2111 cmd->base.speed = speed ? : SPEED_UNKNOWN; 2112 2113 return 0; 2114 } 2115 2116 static const struct ethtool_ops team_ethtool_ops = { 2117 .get_drvinfo = team_ethtool_get_drvinfo, 2118 .get_link = ethtool_op_get_link, 2119 .get_link_ksettings = team_ethtool_get_link_ksettings, 2120 }; 2121 2122 /*********************** 2123 * rt netlink interface 2124 ***********************/ 2125 2126 static void team_setup_by_port(struct net_device *dev, 2127 struct net_device *port_dev) 2128 { 2129 dev->header_ops = port_dev->header_ops; 2130 dev->type = port_dev->type; 2131 dev->hard_header_len = port_dev->hard_header_len; 2132 dev->needed_headroom = port_dev->needed_headroom; 2133 dev->addr_len = port_dev->addr_len; 2134 dev->mtu = port_dev->mtu; 2135 memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len); 2136 eth_hw_addr_inherit(dev, port_dev); 2137 } 2138 2139 static int team_dev_type_check_change(struct net_device *dev, 2140 struct net_device *port_dev) 2141 { 2142 struct team *team = netdev_priv(dev); 2143 char *portname = port_dev->name; 2144 int err; 2145 2146 if (dev->type == port_dev->type) 2147 return 0; 2148 if (!list_empty(&team->port_list)) { 2149 netdev_err(dev, "Device %s is of different type\n", portname); 2150 return -EBUSY; 2151 } 2152 err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev); 2153 err = notifier_to_errno(err); 2154 if (err) { 2155 netdev_err(dev, "Refused to change device type\n"); 2156 return err; 2157 } 2158 dev_uc_flush(dev); 2159 dev_mc_flush(dev); 2160 team_setup_by_port(dev, port_dev); 2161 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev); 2162 return 0; 2163 } 2164 2165 static void team_setup(struct net_device *dev) 2166 { 2167 ether_setup(dev); 2168 dev->max_mtu = ETH_MAX_MTU; 2169 2170 dev->netdev_ops = &team_netdev_ops; 2171 dev->ethtool_ops = &team_ethtool_ops; 2172 dev->needs_free_netdev = true; 2173 dev->priv_destructor = team_destructor; 2174 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); 2175 dev->priv_flags |= IFF_NO_QUEUE; 2176 dev->priv_flags |= IFF_TEAM; 2177 2178 /* 2179 * Indicate we support unicast address filtering. That way core won't 2180 * bring us to promisc mode in case a unicast addr is added. 2181 * Let this up to underlay drivers. 2182 */ 2183 dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE; 2184 2185 dev->features |= NETIF_F_LLTX; 2186 dev->features |= NETIF_F_GRO; 2187 2188 /* Don't allow team devices to change network namespaces. */ 2189 dev->features |= NETIF_F_NETNS_LOCAL; 2190 2191 dev->hw_features = TEAM_VLAN_FEATURES | 2192 NETIF_F_HW_VLAN_CTAG_RX | 2193 NETIF_F_HW_VLAN_CTAG_FILTER; 2194 2195 dev->hw_features |= NETIF_F_GSO_ENCAP_ALL; 2196 dev->features |= dev->hw_features; 2197 dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; 2198 } 2199 2200 static int team_newlink(struct net *src_net, struct net_device *dev, 2201 struct nlattr *tb[], struct nlattr *data[], 2202 struct netlink_ext_ack *extack) 2203 { 2204 if (tb[IFLA_ADDRESS] == NULL) 2205 eth_hw_addr_random(dev); 2206 2207 return register_netdevice(dev); 2208 } 2209 2210 static int team_validate(struct nlattr *tb[], struct nlattr *data[], 2211 struct netlink_ext_ack *extack) 2212 { 2213 if (tb[IFLA_ADDRESS]) { 2214 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) 2215 return -EINVAL; 2216 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) 2217 return -EADDRNOTAVAIL; 2218 } 2219 return 0; 2220 } 2221 2222 static unsigned int team_get_num_tx_queues(void) 2223 { 2224 return TEAM_DEFAULT_NUM_TX_QUEUES; 2225 } 2226 2227 static unsigned int team_get_num_rx_queues(void) 2228 { 2229 return TEAM_DEFAULT_NUM_RX_QUEUES; 2230 } 2231 2232 static struct rtnl_link_ops team_link_ops __read_mostly = { 2233 .kind = DRV_NAME, 2234 .priv_size = sizeof(struct team), 2235 .setup = team_setup, 2236 .newlink = team_newlink, 2237 .validate = team_validate, 2238 .get_num_tx_queues = team_get_num_tx_queues, 2239 .get_num_rx_queues = team_get_num_rx_queues, 2240 }; 2241 2242 2243 /*********************************** 2244 * Generic netlink custom interface 2245 ***********************************/ 2246 2247 static struct genl_family team_nl_family; 2248 2249 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = { 2250 [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, }, 2251 [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 }, 2252 [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED }, 2253 [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED }, 2254 }; 2255 2256 static const struct nla_policy 2257 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = { 2258 [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, }, 2259 [TEAM_ATTR_OPTION_NAME] = { 2260 .type = NLA_STRING, 2261 .len = TEAM_STRING_MAX_LEN, 2262 }, 2263 [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG }, 2264 [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 }, 2265 [TEAM_ATTR_OPTION_DATA] = { .type = NLA_BINARY }, 2266 [TEAM_ATTR_OPTION_PORT_IFINDEX] = { .type = NLA_U32 }, 2267 [TEAM_ATTR_OPTION_ARRAY_INDEX] = { .type = NLA_U32 }, 2268 }; 2269 2270 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info) 2271 { 2272 struct sk_buff *msg; 2273 void *hdr; 2274 int err; 2275 2276 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 2277 if (!msg) 2278 return -ENOMEM; 2279 2280 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq, 2281 &team_nl_family, 0, TEAM_CMD_NOOP); 2282 if (!hdr) { 2283 err = -EMSGSIZE; 2284 goto err_msg_put; 2285 } 2286 2287 genlmsg_end(msg, hdr); 2288 2289 return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid); 2290 2291 err_msg_put: 2292 nlmsg_free(msg); 2293 2294 return err; 2295 } 2296 2297 /* 2298 * Netlink cmd functions should be locked by following two functions. 2299 * Since dev gets held here, that ensures dev won't disappear in between. 2300 */ 2301 static struct team *team_nl_team_get(struct genl_info *info) 2302 { 2303 struct net *net = genl_info_net(info); 2304 int ifindex; 2305 struct net_device *dev; 2306 struct team *team; 2307 2308 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX]) 2309 return NULL; 2310 2311 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]); 2312 dev = dev_get_by_index(net, ifindex); 2313 if (!dev || dev->netdev_ops != &team_netdev_ops) { 2314 if (dev) 2315 dev_put(dev); 2316 return NULL; 2317 } 2318 2319 team = netdev_priv(dev); 2320 mutex_lock(&team->lock); 2321 return team; 2322 } 2323 2324 static void team_nl_team_put(struct team *team) 2325 { 2326 mutex_unlock(&team->lock); 2327 dev_put(team->dev); 2328 } 2329 2330 typedef int team_nl_send_func_t(struct sk_buff *skb, 2331 struct team *team, u32 portid); 2332 2333 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid) 2334 { 2335 return genlmsg_unicast(dev_net(team->dev), skb, portid); 2336 } 2337 2338 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team, 2339 struct team_option_inst *opt_inst) 2340 { 2341 struct nlattr *option_item; 2342 struct team_option *option = opt_inst->option; 2343 struct team_option_inst_info *opt_inst_info = &opt_inst->info; 2344 struct team_gsetter_ctx ctx; 2345 int err; 2346 2347 ctx.info = opt_inst_info; 2348 err = team_option_get(team, opt_inst, &ctx); 2349 if (err) 2350 return err; 2351 2352 option_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_OPTION); 2353 if (!option_item) 2354 return -EMSGSIZE; 2355 2356 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name)) 2357 goto nest_cancel; 2358 if (opt_inst_info->port && 2359 nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX, 2360 opt_inst_info->port->dev->ifindex)) 2361 goto nest_cancel; 2362 if (opt_inst->option->array_size && 2363 nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX, 2364 opt_inst_info->array_index)) 2365 goto nest_cancel; 2366 2367 switch (option->type) { 2368 case TEAM_OPTION_TYPE_U32: 2369 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32)) 2370 goto nest_cancel; 2371 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val)) 2372 goto nest_cancel; 2373 break; 2374 case TEAM_OPTION_TYPE_STRING: 2375 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING)) 2376 goto nest_cancel; 2377 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA, 2378 ctx.data.str_val)) 2379 goto nest_cancel; 2380 break; 2381 case TEAM_OPTION_TYPE_BINARY: 2382 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY)) 2383 goto nest_cancel; 2384 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len, 2385 ctx.data.bin_val.ptr)) 2386 goto nest_cancel; 2387 break; 2388 case TEAM_OPTION_TYPE_BOOL: 2389 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG)) 2390 goto nest_cancel; 2391 if (ctx.data.bool_val && 2392 nla_put_flag(skb, TEAM_ATTR_OPTION_DATA)) 2393 goto nest_cancel; 2394 break; 2395 case TEAM_OPTION_TYPE_S32: 2396 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32)) 2397 goto nest_cancel; 2398 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val)) 2399 goto nest_cancel; 2400 break; 2401 default: 2402 BUG(); 2403 } 2404 if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED)) 2405 goto nest_cancel; 2406 if (opt_inst->changed) { 2407 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED)) 2408 goto nest_cancel; 2409 opt_inst->changed = false; 2410 } 2411 nla_nest_end(skb, option_item); 2412 return 0; 2413 2414 nest_cancel: 2415 nla_nest_cancel(skb, option_item); 2416 return -EMSGSIZE; 2417 } 2418 2419 static int __send_and_alloc_skb(struct sk_buff **pskb, 2420 struct team *team, u32 portid, 2421 team_nl_send_func_t *send_func) 2422 { 2423 int err; 2424 2425 if (*pskb) { 2426 err = send_func(*pskb, team, portid); 2427 if (err) 2428 return err; 2429 } 2430 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL); 2431 if (!*pskb) 2432 return -ENOMEM; 2433 return 0; 2434 } 2435 2436 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq, 2437 int flags, team_nl_send_func_t *send_func, 2438 struct list_head *sel_opt_inst_list) 2439 { 2440 struct nlattr *option_list; 2441 struct nlmsghdr *nlh; 2442 void *hdr; 2443 struct team_option_inst *opt_inst; 2444 int err; 2445 struct sk_buff *skb = NULL; 2446 bool incomplete; 2447 int i; 2448 2449 opt_inst = list_first_entry(sel_opt_inst_list, 2450 struct team_option_inst, tmp_list); 2451 2452 start_again: 2453 err = __send_and_alloc_skb(&skb, team, portid, send_func); 2454 if (err) 2455 return err; 2456 2457 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI, 2458 TEAM_CMD_OPTIONS_GET); 2459 if (!hdr) { 2460 nlmsg_free(skb); 2461 return -EMSGSIZE; 2462 } 2463 2464 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex)) 2465 goto nla_put_failure; 2466 option_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_OPTION); 2467 if (!option_list) 2468 goto nla_put_failure; 2469 2470 i = 0; 2471 incomplete = false; 2472 list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) { 2473 err = team_nl_fill_one_option_get(skb, team, opt_inst); 2474 if (err) { 2475 if (err == -EMSGSIZE) { 2476 if (!i) 2477 goto errout; 2478 incomplete = true; 2479 break; 2480 } 2481 goto errout; 2482 } 2483 i++; 2484 } 2485 2486 nla_nest_end(skb, option_list); 2487 genlmsg_end(skb, hdr); 2488 if (incomplete) 2489 goto start_again; 2490 2491 send_done: 2492 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI); 2493 if (!nlh) { 2494 err = __send_and_alloc_skb(&skb, team, portid, send_func); 2495 if (err) 2496 return err; 2497 goto send_done; 2498 } 2499 2500 return send_func(skb, team, portid); 2501 2502 nla_put_failure: 2503 err = -EMSGSIZE; 2504 errout: 2505 nlmsg_free(skb); 2506 return err; 2507 } 2508 2509 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info) 2510 { 2511 struct team *team; 2512 struct team_option_inst *opt_inst; 2513 int err; 2514 LIST_HEAD(sel_opt_inst_list); 2515 2516 team = team_nl_team_get(info); 2517 if (!team) 2518 return -EINVAL; 2519 2520 list_for_each_entry(opt_inst, &team->option_inst_list, list) 2521 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list); 2522 err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq, 2523 NLM_F_ACK, team_nl_send_unicast, 2524 &sel_opt_inst_list); 2525 2526 team_nl_team_put(team); 2527 2528 return err; 2529 } 2530 2531 static int team_nl_send_event_options_get(struct team *team, 2532 struct list_head *sel_opt_inst_list); 2533 2534 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info) 2535 { 2536 struct team *team; 2537 int err = 0; 2538 int i; 2539 struct nlattr *nl_option; 2540 2541 rtnl_lock(); 2542 2543 team = team_nl_team_get(info); 2544 if (!team) { 2545 err = -EINVAL; 2546 goto rtnl_unlock; 2547 } 2548 2549 err = -EINVAL; 2550 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) { 2551 err = -EINVAL; 2552 goto team_put; 2553 } 2554 2555 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) { 2556 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1]; 2557 struct nlattr *attr; 2558 struct nlattr *attr_data; 2559 LIST_HEAD(opt_inst_list); 2560 enum team_option_type opt_type; 2561 int opt_port_ifindex = 0; /* != 0 for per-port options */ 2562 u32 opt_array_index = 0; 2563 bool opt_is_array = false; 2564 struct team_option_inst *opt_inst; 2565 char *opt_name; 2566 bool opt_found = false; 2567 2568 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) { 2569 err = -EINVAL; 2570 goto team_put; 2571 } 2572 err = nla_parse_nested_deprecated(opt_attrs, 2573 TEAM_ATTR_OPTION_MAX, 2574 nl_option, 2575 team_nl_option_policy, 2576 info->extack); 2577 if (err) 2578 goto team_put; 2579 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] || 2580 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) { 2581 err = -EINVAL; 2582 goto team_put; 2583 } 2584 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) { 2585 case NLA_U32: 2586 opt_type = TEAM_OPTION_TYPE_U32; 2587 break; 2588 case NLA_STRING: 2589 opt_type = TEAM_OPTION_TYPE_STRING; 2590 break; 2591 case NLA_BINARY: 2592 opt_type = TEAM_OPTION_TYPE_BINARY; 2593 break; 2594 case NLA_FLAG: 2595 opt_type = TEAM_OPTION_TYPE_BOOL; 2596 break; 2597 case NLA_S32: 2598 opt_type = TEAM_OPTION_TYPE_S32; 2599 break; 2600 default: 2601 goto team_put; 2602 } 2603 2604 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA]; 2605 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) { 2606 err = -EINVAL; 2607 goto team_put; 2608 } 2609 2610 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]); 2611 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX]; 2612 if (attr) 2613 opt_port_ifindex = nla_get_u32(attr); 2614 2615 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX]; 2616 if (attr) { 2617 opt_is_array = true; 2618 opt_array_index = nla_get_u32(attr); 2619 } 2620 2621 list_for_each_entry(opt_inst, &team->option_inst_list, list) { 2622 struct team_option *option = opt_inst->option; 2623 struct team_gsetter_ctx ctx; 2624 struct team_option_inst_info *opt_inst_info; 2625 int tmp_ifindex; 2626 2627 opt_inst_info = &opt_inst->info; 2628 tmp_ifindex = opt_inst_info->port ? 2629 opt_inst_info->port->dev->ifindex : 0; 2630 if (option->type != opt_type || 2631 strcmp(option->name, opt_name) || 2632 tmp_ifindex != opt_port_ifindex || 2633 (option->array_size && !opt_is_array) || 2634 opt_inst_info->array_index != opt_array_index) 2635 continue; 2636 opt_found = true; 2637 ctx.info = opt_inst_info; 2638 switch (opt_type) { 2639 case TEAM_OPTION_TYPE_U32: 2640 ctx.data.u32_val = nla_get_u32(attr_data); 2641 break; 2642 case TEAM_OPTION_TYPE_STRING: 2643 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) { 2644 err = -EINVAL; 2645 goto team_put; 2646 } 2647 ctx.data.str_val = nla_data(attr_data); 2648 break; 2649 case TEAM_OPTION_TYPE_BINARY: 2650 ctx.data.bin_val.len = nla_len(attr_data); 2651 ctx.data.bin_val.ptr = nla_data(attr_data); 2652 break; 2653 case TEAM_OPTION_TYPE_BOOL: 2654 ctx.data.bool_val = attr_data ? true : false; 2655 break; 2656 case TEAM_OPTION_TYPE_S32: 2657 ctx.data.s32_val = nla_get_s32(attr_data); 2658 break; 2659 default: 2660 BUG(); 2661 } 2662 err = team_option_set(team, opt_inst, &ctx); 2663 if (err) 2664 goto team_put; 2665 opt_inst->changed = true; 2666 list_add(&opt_inst->tmp_list, &opt_inst_list); 2667 } 2668 if (!opt_found) { 2669 err = -ENOENT; 2670 goto team_put; 2671 } 2672 2673 err = team_nl_send_event_options_get(team, &opt_inst_list); 2674 if (err) 2675 break; 2676 } 2677 2678 team_put: 2679 team_nl_team_put(team); 2680 rtnl_unlock: 2681 rtnl_unlock(); 2682 return err; 2683 } 2684 2685 static int team_nl_fill_one_port_get(struct sk_buff *skb, 2686 struct team_port *port) 2687 { 2688 struct nlattr *port_item; 2689 2690 port_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_PORT); 2691 if (!port_item) 2692 goto nest_cancel; 2693 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex)) 2694 goto nest_cancel; 2695 if (port->changed) { 2696 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED)) 2697 goto nest_cancel; 2698 port->changed = false; 2699 } 2700 if ((port->removed && 2701 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) || 2702 (port->state.linkup && 2703 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) || 2704 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) || 2705 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex)) 2706 goto nest_cancel; 2707 nla_nest_end(skb, port_item); 2708 return 0; 2709 2710 nest_cancel: 2711 nla_nest_cancel(skb, port_item); 2712 return -EMSGSIZE; 2713 } 2714 2715 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq, 2716 int flags, team_nl_send_func_t *send_func, 2717 struct team_port *one_port) 2718 { 2719 struct nlattr *port_list; 2720 struct nlmsghdr *nlh; 2721 void *hdr; 2722 struct team_port *port; 2723 int err; 2724 struct sk_buff *skb = NULL; 2725 bool incomplete; 2726 int i; 2727 2728 port = list_first_entry_or_null(&team->port_list, 2729 struct team_port, list); 2730 2731 start_again: 2732 err = __send_and_alloc_skb(&skb, team, portid, send_func); 2733 if (err) 2734 return err; 2735 2736 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI, 2737 TEAM_CMD_PORT_LIST_GET); 2738 if (!hdr) { 2739 nlmsg_free(skb); 2740 return -EMSGSIZE; 2741 } 2742 2743 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex)) 2744 goto nla_put_failure; 2745 port_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_PORT); 2746 if (!port_list) 2747 goto nla_put_failure; 2748 2749 i = 0; 2750 incomplete = false; 2751 2752 /* If one port is selected, called wants to send port list containing 2753 * only this port. Otherwise go through all listed ports and send all 2754 */ 2755 if (one_port) { 2756 err = team_nl_fill_one_port_get(skb, one_port); 2757 if (err) 2758 goto errout; 2759 } else if (port) { 2760 list_for_each_entry_from(port, &team->port_list, list) { 2761 err = team_nl_fill_one_port_get(skb, port); 2762 if (err) { 2763 if (err == -EMSGSIZE) { 2764 if (!i) 2765 goto errout; 2766 incomplete = true; 2767 break; 2768 } 2769 goto errout; 2770 } 2771 i++; 2772 } 2773 } 2774 2775 nla_nest_end(skb, port_list); 2776 genlmsg_end(skb, hdr); 2777 if (incomplete) 2778 goto start_again; 2779 2780 send_done: 2781 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI); 2782 if (!nlh) { 2783 err = __send_and_alloc_skb(&skb, team, portid, send_func); 2784 if (err) 2785 return err; 2786 goto send_done; 2787 } 2788 2789 return send_func(skb, team, portid); 2790 2791 nla_put_failure: 2792 err = -EMSGSIZE; 2793 errout: 2794 nlmsg_free(skb); 2795 return err; 2796 } 2797 2798 static int team_nl_cmd_port_list_get(struct sk_buff *skb, 2799 struct genl_info *info) 2800 { 2801 struct team *team; 2802 int err; 2803 2804 team = team_nl_team_get(info); 2805 if (!team) 2806 return -EINVAL; 2807 2808 err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq, 2809 NLM_F_ACK, team_nl_send_unicast, NULL); 2810 2811 team_nl_team_put(team); 2812 2813 return err; 2814 } 2815 2816 static const struct genl_small_ops team_nl_ops[] = { 2817 { 2818 .cmd = TEAM_CMD_NOOP, 2819 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 2820 .doit = team_nl_cmd_noop, 2821 }, 2822 { 2823 .cmd = TEAM_CMD_OPTIONS_SET, 2824 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 2825 .doit = team_nl_cmd_options_set, 2826 .flags = GENL_ADMIN_PERM, 2827 }, 2828 { 2829 .cmd = TEAM_CMD_OPTIONS_GET, 2830 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 2831 .doit = team_nl_cmd_options_get, 2832 .flags = GENL_ADMIN_PERM, 2833 }, 2834 { 2835 .cmd = TEAM_CMD_PORT_LIST_GET, 2836 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 2837 .doit = team_nl_cmd_port_list_get, 2838 .flags = GENL_ADMIN_PERM, 2839 }, 2840 }; 2841 2842 static const struct genl_multicast_group team_nl_mcgrps[] = { 2843 { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, }, 2844 }; 2845 2846 static struct genl_family team_nl_family __ro_after_init = { 2847 .name = TEAM_GENL_NAME, 2848 .version = TEAM_GENL_VERSION, 2849 .maxattr = TEAM_ATTR_MAX, 2850 .policy = team_nl_policy, 2851 .netnsok = true, 2852 .module = THIS_MODULE, 2853 .small_ops = team_nl_ops, 2854 .n_small_ops = ARRAY_SIZE(team_nl_ops), 2855 .resv_start_op = TEAM_CMD_PORT_LIST_GET + 1, 2856 .mcgrps = team_nl_mcgrps, 2857 .n_mcgrps = ARRAY_SIZE(team_nl_mcgrps), 2858 }; 2859 2860 static int team_nl_send_multicast(struct sk_buff *skb, 2861 struct team *team, u32 portid) 2862 { 2863 return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev), 2864 skb, 0, 0, GFP_KERNEL); 2865 } 2866 2867 static int team_nl_send_event_options_get(struct team *team, 2868 struct list_head *sel_opt_inst_list) 2869 { 2870 return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast, 2871 sel_opt_inst_list); 2872 } 2873 2874 static int team_nl_send_event_port_get(struct team *team, 2875 struct team_port *port) 2876 { 2877 return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast, 2878 port); 2879 } 2880 2881 static int __init team_nl_init(void) 2882 { 2883 return genl_register_family(&team_nl_family); 2884 } 2885 2886 static void team_nl_fini(void) 2887 { 2888 genl_unregister_family(&team_nl_family); 2889 } 2890 2891 2892 /****************** 2893 * Change checkers 2894 ******************/ 2895 2896 static void __team_options_change_check(struct team *team) 2897 { 2898 int err; 2899 struct team_option_inst *opt_inst; 2900 LIST_HEAD(sel_opt_inst_list); 2901 2902 list_for_each_entry(opt_inst, &team->option_inst_list, list) { 2903 if (opt_inst->changed) 2904 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list); 2905 } 2906 err = team_nl_send_event_options_get(team, &sel_opt_inst_list); 2907 if (err && err != -ESRCH) 2908 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n", 2909 err); 2910 } 2911 2912 /* rtnl lock is held */ 2913 2914 static void __team_port_change_send(struct team_port *port, bool linkup) 2915 { 2916 int err; 2917 2918 port->changed = true; 2919 port->state.linkup = linkup; 2920 team_refresh_port_linkup(port); 2921 if (linkup) { 2922 struct ethtool_link_ksettings ecmd; 2923 2924 err = __ethtool_get_link_ksettings(port->dev, &ecmd); 2925 if (!err) { 2926 port->state.speed = ecmd.base.speed; 2927 port->state.duplex = ecmd.base.duplex; 2928 goto send_event; 2929 } 2930 } 2931 port->state.speed = 0; 2932 port->state.duplex = 0; 2933 2934 send_event: 2935 err = team_nl_send_event_port_get(port->team, port); 2936 if (err && err != -ESRCH) 2937 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n", 2938 port->dev->name, err); 2939 2940 } 2941 2942 static void __team_carrier_check(struct team *team) 2943 { 2944 struct team_port *port; 2945 bool team_linkup; 2946 2947 if (team->user_carrier_enabled) 2948 return; 2949 2950 team_linkup = false; 2951 list_for_each_entry(port, &team->port_list, list) { 2952 if (port->linkup) { 2953 team_linkup = true; 2954 break; 2955 } 2956 } 2957 2958 if (team_linkup) 2959 netif_carrier_on(team->dev); 2960 else 2961 netif_carrier_off(team->dev); 2962 } 2963 2964 static void __team_port_change_check(struct team_port *port, bool linkup) 2965 { 2966 if (port->state.linkup != linkup) 2967 __team_port_change_send(port, linkup); 2968 __team_carrier_check(port->team); 2969 } 2970 2971 static void __team_port_change_port_added(struct team_port *port, bool linkup) 2972 { 2973 __team_port_change_send(port, linkup); 2974 __team_carrier_check(port->team); 2975 } 2976 2977 static void __team_port_change_port_removed(struct team_port *port) 2978 { 2979 port->removed = true; 2980 __team_port_change_send(port, false); 2981 __team_carrier_check(port->team); 2982 } 2983 2984 static void team_port_change_check(struct team_port *port, bool linkup) 2985 { 2986 struct team *team = port->team; 2987 2988 mutex_lock(&team->lock); 2989 __team_port_change_check(port, linkup); 2990 mutex_unlock(&team->lock); 2991 } 2992 2993 2994 /************************************ 2995 * Net device notifier event handler 2996 ************************************/ 2997 2998 static int team_device_event(struct notifier_block *unused, 2999 unsigned long event, void *ptr) 3000 { 3001 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 3002 struct team_port *port; 3003 3004 port = team_port_get_rtnl(dev); 3005 if (!port) 3006 return NOTIFY_DONE; 3007 3008 switch (event) { 3009 case NETDEV_UP: 3010 if (netif_oper_up(dev)) 3011 team_port_change_check(port, true); 3012 break; 3013 case NETDEV_DOWN: 3014 team_port_change_check(port, false); 3015 break; 3016 case NETDEV_CHANGE: 3017 if (netif_running(port->dev)) 3018 team_port_change_check(port, 3019 !!netif_oper_up(port->dev)); 3020 break; 3021 case NETDEV_UNREGISTER: 3022 team_del_slave(port->team->dev, dev); 3023 break; 3024 case NETDEV_FEAT_CHANGE: 3025 team_compute_features(port->team); 3026 break; 3027 case NETDEV_PRECHANGEMTU: 3028 /* Forbid to change mtu of underlaying device */ 3029 if (!port->team->port_mtu_change_allowed) 3030 return NOTIFY_BAD; 3031 break; 3032 case NETDEV_PRE_TYPE_CHANGE: 3033 /* Forbid to change type of underlaying device */ 3034 return NOTIFY_BAD; 3035 case NETDEV_RESEND_IGMP: 3036 /* Propagate to master device */ 3037 call_netdevice_notifiers(event, port->team->dev); 3038 break; 3039 } 3040 return NOTIFY_DONE; 3041 } 3042 3043 static struct notifier_block team_notifier_block __read_mostly = { 3044 .notifier_call = team_device_event, 3045 }; 3046 3047 3048 /*********************** 3049 * Module init and exit 3050 ***********************/ 3051 3052 static int __init team_module_init(void) 3053 { 3054 int err; 3055 3056 register_netdevice_notifier(&team_notifier_block); 3057 3058 err = rtnl_link_register(&team_link_ops); 3059 if (err) 3060 goto err_rtnl_reg; 3061 3062 err = team_nl_init(); 3063 if (err) 3064 goto err_nl_init; 3065 3066 return 0; 3067 3068 err_nl_init: 3069 rtnl_link_unregister(&team_link_ops); 3070 3071 err_rtnl_reg: 3072 unregister_netdevice_notifier(&team_notifier_block); 3073 3074 return err; 3075 } 3076 3077 static void __exit team_module_exit(void) 3078 { 3079 team_nl_fini(); 3080 rtnl_link_unregister(&team_link_ops); 3081 unregister_netdevice_notifier(&team_notifier_block); 3082 } 3083 3084 module_init(team_module_init); 3085 module_exit(team_module_exit); 3086 3087 MODULE_LICENSE("GPL v2"); 3088 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>"); 3089 MODULE_DESCRIPTION("Ethernet team device driver"); 3090 MODULE_ALIAS_RTNL_LINK(DRV_NAME); 3091