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 WRITE_ONCE(team->ops.transmit, team_dummy_transmit); 538 else 539 WRITE_ONCE(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 WRITE_ONCE(team->ops.receive, team_dummy_receive); 544 else 545 WRITE_ONCE(team->ops.receive, team->mode->ops->receive); 546 } 547 548 /* 549 * team_change_mode() ensures no ports are present during mode change, 550 * but lockless readers can still reach team_xmit(). Avoid touching 551 * transmit/receive -- they are already set to dummies by 552 * team_adjust_ops() since no ports are enabled. synchronize_net() 553 * drains in-flight readers before destroying old mode state. 554 */ 555 static int __team_change_mode(struct team *team, 556 const struct team_mode *new_mode) 557 { 558 /* Check if mode was previously set and do cleanup if so */ 559 if (team_is_mode_set(team)) { 560 void (*exit_op)(struct team *team) = team->ops.exit; 561 562 /* Clear cold-path ops used only under RTNL. transmit and 563 * receive are already dummies (no ports) so leave them 564 * alone -- overwriting them is the source of the race. 565 */ 566 team->ops.init = NULL; 567 team->ops.exit = NULL; 568 team->ops.port_enter = NULL; 569 team->ops.port_leave = NULL; 570 team->ops.port_change_dev_addr = NULL; 571 team->ops.port_tx_disabled = NULL; 572 573 /* Wait for in-flight readers before tearing down mode 574 * state they may reference. 575 */ 576 synchronize_net(); 577 578 if (exit_op) 579 exit_op(team); 580 team_mode_put(team->mode); 581 team_set_no_mode(team); 582 /* zero private data area */ 583 memset(&team->mode_priv, 0, 584 sizeof(struct team) - offsetof(struct team, mode_priv)); 585 } 586 587 if (!new_mode) 588 return 0; 589 590 if (new_mode->ops->init) { 591 int err; 592 593 err = new_mode->ops->init(team); 594 if (err) 595 return err; 596 } 597 598 team->mode = new_mode; 599 team->ops.init = new_mode->ops->init; 600 team->ops.exit = new_mode->ops->exit; 601 team->ops.port_enter = new_mode->ops->port_enter; 602 team->ops.port_leave = new_mode->ops->port_leave; 603 team->ops.port_change_dev_addr = new_mode->ops->port_change_dev_addr; 604 team->ops.port_tx_disabled = new_mode->ops->port_tx_disabled; 605 team_adjust_ops(team); 606 607 return 0; 608 } 609 610 static int team_change_mode(struct team *team, const char *kind) 611 { 612 const struct team_mode *new_mode; 613 struct net_device *dev = netdev_from_priv(team); 614 int err; 615 616 if (!list_empty(&team->port_list)) { 617 netdev_err(dev, "No ports can be present during mode change\n"); 618 return -EBUSY; 619 } 620 621 if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) { 622 netdev_err(dev, "Unable to change to the same mode the team is in\n"); 623 return -EINVAL; 624 } 625 626 new_mode = team_mode_get(kind); 627 if (!new_mode) { 628 netdev_err(dev, "Mode \"%s\" not found\n", kind); 629 return -EINVAL; 630 } 631 632 err = __team_change_mode(team, new_mode); 633 if (err) { 634 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind); 635 team_mode_put(new_mode); 636 return err; 637 } 638 639 netdev_info(dev, "Mode changed to \"%s\"\n", kind); 640 return 0; 641 } 642 643 644 /********************* 645 * Peers notification 646 *********************/ 647 648 static void team_notify_peers_work(struct work_struct *work) 649 { 650 struct team *team; 651 int val; 652 653 team = container_of(work, struct team, notify_peers.dw.work); 654 655 if (!rtnl_trylock()) { 656 schedule_delayed_work(&team->notify_peers.dw, 0); 657 return; 658 } 659 val = atomic_dec_if_positive(&team->notify_peers.count_pending); 660 if (val < 0) { 661 rtnl_unlock(); 662 return; 663 } 664 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev_from_priv(team)); 665 rtnl_unlock(); 666 if (val) 667 schedule_delayed_work(&team->notify_peers.dw, 668 msecs_to_jiffies(team->notify_peers.interval)); 669 } 670 671 static void team_notify_peers(struct team *team) 672 { 673 if (!team->notify_peers.count || !netif_running(netdev_from_priv(team))) 674 return; 675 atomic_add(team->notify_peers.count, &team->notify_peers.count_pending); 676 schedule_delayed_work(&team->notify_peers.dw, 0); 677 } 678 679 static void team_notify_peers_init(struct team *team) 680 { 681 INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work); 682 } 683 684 static void team_notify_peers_fini(struct team *team) 685 { 686 cancel_delayed_work_sync(&team->notify_peers.dw); 687 } 688 689 690 /******************************* 691 * Send multicast group rejoins 692 *******************************/ 693 694 static void team_mcast_rejoin_work(struct work_struct *work) 695 { 696 struct team *team; 697 int val; 698 699 team = container_of(work, struct team, mcast_rejoin.dw.work); 700 701 if (!rtnl_trylock()) { 702 schedule_delayed_work(&team->mcast_rejoin.dw, 0); 703 return; 704 } 705 val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending); 706 if (val < 0) { 707 rtnl_unlock(); 708 return; 709 } 710 call_netdevice_notifiers(NETDEV_RESEND_IGMP, netdev_from_priv(team)); 711 rtnl_unlock(); 712 if (val) 713 schedule_delayed_work(&team->mcast_rejoin.dw, 714 msecs_to_jiffies(team->mcast_rejoin.interval)); 715 } 716 717 static void team_mcast_rejoin(struct team *team) 718 { 719 if (!team->mcast_rejoin.count || !netif_running(netdev_from_priv(team))) 720 return; 721 atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending); 722 schedule_delayed_work(&team->mcast_rejoin.dw, 0); 723 } 724 725 static void team_mcast_rejoin_init(struct team *team) 726 { 727 INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work); 728 } 729 730 static void team_mcast_rejoin_fini(struct team *team) 731 { 732 cancel_delayed_work_sync(&team->mcast_rejoin.dw); 733 } 734 735 736 /************************ 737 * Rx path frame handler 738 ************************/ 739 740 /* note: already called with rcu_read_lock */ 741 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb) 742 { 743 struct sk_buff *skb = *pskb; 744 struct team_port *port; 745 struct team *team; 746 rx_handler_result_t res; 747 748 skb = skb_share_check(skb, GFP_ATOMIC); 749 if (!skb) 750 return RX_HANDLER_CONSUMED; 751 752 *pskb = skb; 753 754 port = team_port_get_rcu(skb->dev); 755 team = port->team; 756 if (!team_port_rx_enabled(port)) { 757 if (is_link_local_ether_addr(eth_hdr(skb)->h_dest)) 758 /* link-local packets are mostly useful when stack receives them 759 * with the link they arrive on. 760 */ 761 return RX_HANDLER_PASS; 762 /* allow exact match delivery for disabled ports */ 763 res = RX_HANDLER_EXACT; 764 } else { 765 res = READ_ONCE(team->ops.receive)(team, port, skb); 766 } 767 if (res == RX_HANDLER_ANOTHER) { 768 struct team_pcpu_stats *pcpu_stats; 769 770 pcpu_stats = this_cpu_ptr(team->pcpu_stats); 771 u64_stats_update_begin(&pcpu_stats->syncp); 772 u64_stats_inc(&pcpu_stats->rx_packets); 773 u64_stats_add(&pcpu_stats->rx_bytes, skb->len); 774 if (skb->pkt_type == PACKET_MULTICAST) 775 u64_stats_inc(&pcpu_stats->rx_multicast); 776 u64_stats_update_end(&pcpu_stats->syncp); 777 778 skb->dev = netdev_from_priv(team); 779 } else if (res == RX_HANDLER_EXACT) { 780 this_cpu_inc(team->pcpu_stats->rx_nohandler); 781 } else { 782 this_cpu_inc(team->pcpu_stats->rx_dropped); 783 } 784 785 return res; 786 } 787 788 789 /************************************* 790 * Multiqueue Tx port select override 791 *************************************/ 792 793 static int team_queue_override_init(struct team *team) 794 { 795 struct list_head *listarr; 796 unsigned int queue_cnt = netdev_from_priv(team)->num_tx_queues - 1; 797 unsigned int i; 798 799 if (!queue_cnt) 800 return 0; 801 listarr = kmalloc_objs(struct list_head, queue_cnt); 802 if (!listarr) 803 return -ENOMEM; 804 team->qom_lists = listarr; 805 for (i = 0; i < queue_cnt; i++) 806 INIT_LIST_HEAD(listarr++); 807 return 0; 808 } 809 810 static void team_queue_override_fini(struct team *team) 811 { 812 kfree(team->qom_lists); 813 } 814 815 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id) 816 { 817 return &team->qom_lists[queue_id - 1]; 818 } 819 820 /* 821 * note: already called with rcu_read_lock 822 */ 823 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb, 824 bool *tx_success) 825 { 826 struct list_head *qom_list; 827 struct team_port *port; 828 829 if (!team->queue_override_enabled || !skb->queue_mapping) 830 return false; 831 qom_list = __team_get_qom_list(team, skb->queue_mapping); 832 port = list_first_or_null_rcu(qom_list, struct team_port, qom_list); 833 if (!port) 834 return false; 835 *tx_success = !team_dev_queue_xmit(team, port, skb); 836 return true; 837 } 838 839 static void __team_queue_override_port_del(struct team *team, 840 struct team_port *port) 841 { 842 if (!port->queue_id) 843 return; 844 list_del_rcu(&port->qom_list); 845 } 846 847 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port, 848 struct team_port *cur) 849 { 850 if (port->priority < cur->priority) 851 return true; 852 if (port->priority > cur->priority) 853 return false; 854 if (port->tx_index < cur->tx_index) 855 return true; 856 return false; 857 } 858 859 static void __team_queue_override_port_add(struct team *team, 860 struct team_port *port) 861 { 862 struct team_port *cur; 863 struct list_head *qom_list; 864 struct list_head *node; 865 866 if (!port->queue_id) 867 return; 868 qom_list = __team_get_qom_list(team, port->queue_id); 869 node = qom_list; 870 list_for_each_entry(cur, qom_list, qom_list) { 871 if (team_queue_override_port_has_gt_prio_than(port, cur)) 872 break; 873 node = &cur->qom_list; 874 } 875 list_add_tail_rcu(&port->qom_list, node); 876 } 877 878 static void __team_queue_override_enabled_check(struct team *team) 879 { 880 struct team_port *port; 881 bool enabled = false; 882 883 list_for_each_entry(port, &team->port_list, list) { 884 if (port->queue_id) { 885 enabled = true; 886 break; 887 } 888 } 889 if (enabled == team->queue_override_enabled) 890 return; 891 netdev_dbg(netdev_from_priv(team), "%s queue override\n", 892 enabled ? "Enabling" : "Disabling"); 893 team->queue_override_enabled = enabled; 894 } 895 896 static void team_queue_override_port_prio_changed(struct team *team, 897 struct team_port *port) 898 { 899 if (!port->queue_id || !team_port_tx_enabled(port)) 900 return; 901 __team_queue_override_port_del(team, port); 902 __team_queue_override_port_add(team, port); 903 __team_queue_override_enabled_check(team); 904 } 905 906 static void team_queue_override_port_change_queue_id(struct team *team, 907 struct team_port *port, 908 u16 new_queue_id) 909 { 910 if (team_port_tx_enabled(port)) { 911 __team_queue_override_port_del(team, port); 912 port->queue_id = new_queue_id; 913 __team_queue_override_port_add(team, port); 914 __team_queue_override_enabled_check(team); 915 } else { 916 port->queue_id = new_queue_id; 917 } 918 } 919 920 static void team_queue_override_port_add(struct team *team, 921 struct team_port *port) 922 { 923 __team_queue_override_port_add(team, port); 924 __team_queue_override_enabled_check(team); 925 } 926 927 static void team_queue_override_port_del(struct team *team, 928 struct team_port *port) 929 { 930 __team_queue_override_port_del(team, port); 931 __team_queue_override_enabled_check(team); 932 } 933 934 935 /**************** 936 * Port handling 937 ****************/ 938 939 static bool team_port_find(const struct team *team, 940 const struct team_port *port) 941 { 942 struct team_port *cur; 943 944 list_for_each_entry(cur, &team->port_list, list) 945 if (cur == port) 946 return true; 947 return false; 948 } 949 950 static void __team_port_enable_rx(struct team *team, 951 struct team_port *port) 952 { 953 team->rx_en_port_count++; 954 WRITE_ONCE(port->rx_enabled, true); 955 } 956 957 static void __team_port_disable_rx(struct team *team, 958 struct team_port *port) 959 { 960 team->rx_en_port_count--; 961 WRITE_ONCE(port->rx_enabled, false); 962 } 963 964 static void team_port_enable_rx(struct team *team, 965 struct team_port *port) 966 { 967 if (team_port_rx_enabled(port)) 968 return; 969 970 __team_port_enable_rx(team, port); 971 team_adjust_ops(team); 972 team_notify_peers(team); 973 team_mcast_rejoin(team); 974 } 975 976 static void team_port_disable_rx(struct team *team, 977 struct team_port *port) 978 { 979 if (!team_port_rx_enabled(port)) 980 return; 981 982 __team_port_disable_rx(team, port); 983 team_adjust_ops(team); 984 } 985 986 /* 987 * Enable just TX on the port by adding to tx-enabled port hashlist and 988 * setting port->tx_index (Might be racy so reader could see incorrect 989 * ifindex when processing a flying packet, but that is not a problem). 990 * Write guarded by RTNL. 991 */ 992 static void __team_port_enable_tx(struct team *team, 993 struct team_port *port) 994 { 995 WRITE_ONCE(port->tx_index, team->tx_en_port_count); 996 WRITE_ONCE(team->tx_en_port_count, team->tx_en_port_count + 1); 997 hlist_add_head_rcu(&port->tx_hlist, 998 team_tx_port_index_hash(team, port->tx_index)); 999 } 1000 1001 static void team_port_enable_tx(struct team *team, 1002 struct team_port *port) 1003 { 1004 if (team_port_tx_enabled(port)) 1005 return; 1006 1007 __team_port_enable_tx(team, port); 1008 team_adjust_ops(team); 1009 team_queue_override_port_add(team, port); 1010 1011 /* Don't rejoin multicast, since this port might not be receiving. */ 1012 team_notify_peers(team); 1013 team_lower_state_changed(port); 1014 } 1015 1016 static void __reconstruct_port_hlist(struct team *team, int rm_index) 1017 { 1018 struct hlist_head *tx_port_index_hash; 1019 struct team_port *port; 1020 int i; 1021 1022 for (i = rm_index + 1; i < team->tx_en_port_count; i++) { 1023 port = team_get_port_by_tx_index(team, i); 1024 hlist_del_rcu(&port->tx_hlist); 1025 WRITE_ONCE(port->tx_index, port->tx_index - 1); 1026 tx_port_index_hash = team_tx_port_index_hash(team, 1027 port->tx_index); 1028 hlist_add_head_rcu(&port->tx_hlist, tx_port_index_hash); 1029 } 1030 } 1031 1032 static void __team_port_disable_tx(struct team *team, 1033 struct team_port *port) 1034 { 1035 if (team->ops.port_tx_disabled) 1036 team->ops.port_tx_disabled(team, port); 1037 1038 hlist_del_rcu(&port->tx_hlist); 1039 __reconstruct_port_hlist(team, port->tx_index); 1040 1041 WRITE_ONCE(port->tx_index, -1); 1042 WRITE_ONCE(team->tx_en_port_count, team->tx_en_port_count - 1); 1043 } 1044 1045 static void team_port_disable_tx(struct team *team, 1046 struct team_port *port) 1047 { 1048 if (!team_port_tx_enabled(port)) 1049 return; 1050 1051 __team_port_disable_tx(team, port); 1052 1053 team_queue_override_port_del(team, port); 1054 team_adjust_ops(team); 1055 team_lower_state_changed(port); 1056 } 1057 1058 /* 1059 * Enable TX AND RX on the port. 1060 */ 1061 static void team_port_enable(struct team *team, 1062 struct team_port *port) 1063 { 1064 bool rx_was_enabled; 1065 bool tx_was_enabled; 1066 1067 if (team_port_enabled(port)) 1068 return; 1069 1070 rx_was_enabled = team_port_rx_enabled(port); 1071 tx_was_enabled = team_port_tx_enabled(port); 1072 1073 if (!rx_was_enabled) 1074 __team_port_enable_rx(team, port); 1075 if (!tx_was_enabled) 1076 __team_port_enable_tx(team, port); 1077 1078 team_adjust_ops(team); 1079 if (!tx_was_enabled) 1080 team_queue_override_port_add(team, port); 1081 team_notify_peers(team); 1082 if (!rx_was_enabled) 1083 team_mcast_rejoin(team); 1084 if (!tx_was_enabled) 1085 team_lower_state_changed(port); 1086 } 1087 1088 static void team_port_disable(struct team *team, 1089 struct team_port *port) 1090 { 1091 bool rx_was_enabled = team_port_rx_enabled(port); 1092 bool tx_was_enabled = team_port_tx_enabled(port); 1093 1094 if (!tx_was_enabled && !rx_was_enabled) 1095 return; 1096 1097 if (tx_was_enabled) { 1098 __team_port_disable_tx(team, port); 1099 team_queue_override_port_del(team, port); 1100 } 1101 if (rx_was_enabled) 1102 __team_port_disable_rx(team, port); 1103 1104 team_adjust_ops(team); 1105 1106 if (tx_was_enabled) 1107 team_lower_state_changed(port); 1108 } 1109 1110 static int team_port_enter(struct team *team, struct team_port *port) 1111 { 1112 int err = 0; 1113 1114 dev_hold(netdev_from_priv(team)); 1115 if (team->ops.port_enter) { 1116 err = team->ops.port_enter(team, port); 1117 if (err) { 1118 netdev_err(netdev_from_priv(team), 1119 "Device %s failed to enter team mode\n", 1120 port->dev->name); 1121 goto err_port_enter; 1122 } 1123 } 1124 1125 return 0; 1126 1127 err_port_enter: 1128 dev_put(netdev_from_priv(team)); 1129 1130 return err; 1131 } 1132 1133 static void team_port_leave(struct team *team, struct team_port *port) 1134 { 1135 if (team->ops.port_leave) 1136 team->ops.port_leave(team, port); 1137 dev_put(netdev_from_priv(team)); 1138 } 1139 1140 #ifdef CONFIG_NET_POLL_CONTROLLER 1141 static int __team_port_enable_netpoll(struct team_port *port) 1142 { 1143 struct netpoll *np; 1144 int err; 1145 1146 np = kzalloc_obj(*np); 1147 if (!np) 1148 return -ENOMEM; 1149 1150 err = __netpoll_setup(np, port->dev); 1151 if (err) { 1152 kfree(np); 1153 return err; 1154 } 1155 port->np = np; 1156 return err; 1157 } 1158 1159 static int team_port_enable_netpoll(struct team_port *port) 1160 { 1161 if (!netdev_from_priv(port->team)->npinfo) 1162 return 0; 1163 1164 return __team_port_enable_netpoll(port); 1165 } 1166 1167 static void team_port_disable_netpoll(struct team_port *port) 1168 { 1169 struct netpoll *np = port->np; 1170 1171 if (!np) 1172 return; 1173 port->np = NULL; 1174 1175 __netpoll_free(np); 1176 } 1177 #else 1178 static int team_port_enable_netpoll(struct team_port *port) 1179 { 1180 return 0; 1181 } 1182 static void team_port_disable_netpoll(struct team_port *port) 1183 { 1184 } 1185 #endif 1186 1187 static int team_upper_dev_link(struct team *team, struct team_port *port, 1188 struct netlink_ext_ack *extack) 1189 { 1190 struct netdev_lag_upper_info lag_upper_info; 1191 int err; 1192 1193 lag_upper_info.tx_type = team->mode->lag_tx_type; 1194 lag_upper_info.hash_type = NETDEV_LAG_HASH_UNKNOWN; 1195 err = netdev_master_upper_dev_link(port->dev, netdev_from_priv(team), 1196 NULL, &lag_upper_info, extack); 1197 if (err) 1198 return err; 1199 port->dev->priv_flags |= IFF_TEAM_PORT; 1200 return 0; 1201 } 1202 1203 static void team_upper_dev_unlink(struct team *team, struct team_port *port) 1204 { 1205 netdev_upper_dev_unlink(port->dev, netdev_from_priv(team)); 1206 port->dev->priv_flags &= ~IFF_TEAM_PORT; 1207 } 1208 1209 static void __team_port_change_port_added(struct team_port *port, bool linkup); 1210 static int team_dev_type_check_change(struct net_device *dev, 1211 struct net_device *port_dev); 1212 1213 static int team_port_add(struct team *team, struct net_device *port_dev, 1214 struct netlink_ext_ack *extack) 1215 { 1216 struct net_device *dev = netdev_from_priv(team); 1217 struct team_port *port; 1218 char *portname = port_dev->name; 1219 int err; 1220 1221 if (port_dev->flags & IFF_LOOPBACK) { 1222 NL_SET_ERR_MSG(extack, "Loopback device can't be added as a team port"); 1223 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n", 1224 portname); 1225 return -EINVAL; 1226 } 1227 1228 if (port_dev->type == ARPHRD_CAN || 1229 port_dev->type == ARPHRD_IEEE802154 || 1230 port_dev->type == ARPHRD_IEEE802154_MONITOR || 1231 port_dev->type == ARPHRD_6LOWPAN) { 1232 NL_SET_ERR_MSG(extack, 1233 "CAN, IEEE 802.15.4 and 6LoWPAN devices can't be added as a team port"); 1234 netdev_err(dev, "Device %s is CAN, IEEE 802.15.4 or 6LoWPAN. These device types can't be added as a team port\n", 1235 portname); 1236 return -EINVAL; 1237 } 1238 1239 if (netif_is_team_port(port_dev)) { 1240 NL_SET_ERR_MSG(extack, "Device is already a port of a team device"); 1241 netdev_err(dev, "Device %s is already a port " 1242 "of a team device\n", portname); 1243 return -EBUSY; 1244 } 1245 1246 if (dev == port_dev) { 1247 NL_SET_ERR_MSG(extack, "Cannot enslave team device to itself"); 1248 netdev_err(dev, "Cannot enslave team device to itself\n"); 1249 return -EINVAL; 1250 } 1251 1252 if (netdev_has_upper_dev(dev, port_dev)) { 1253 NL_SET_ERR_MSG(extack, "Device is already an upper device of the team interface"); 1254 netdev_err(dev, "Device %s is already an upper device of the team interface\n", 1255 portname); 1256 return -EBUSY; 1257 } 1258 1259 if (netdev_has_upper_dev(port_dev, dev)) { 1260 NL_SET_ERR_MSG(extack, "Device is already a lower device of the team interface"); 1261 netdev_err(dev, "Device %s is already a lower device of the team interface\n", 1262 portname); 1263 return -EBUSY; 1264 } 1265 1266 if (port_dev->features & NETIF_F_VLAN_CHALLENGED && 1267 vlan_uses_dev(dev)) { 1268 NL_SET_ERR_MSG(extack, "Device is VLAN challenged and team device has VLAN set up"); 1269 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n", 1270 portname); 1271 return -EPERM; 1272 } 1273 1274 if (port_dev->flags & IFF_UP) { 1275 NL_SET_ERR_MSG(extack, "Device is up. Set it down before adding it as a team port"); 1276 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n", 1277 portname); 1278 return -EBUSY; 1279 } 1280 1281 port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size, 1282 GFP_KERNEL); 1283 if (!port) 1284 return -ENOMEM; 1285 1286 port->dev = port_dev; 1287 port->team = team; 1288 INIT_LIST_HEAD(&port->qom_list); 1289 1290 port->orig.mtu = port_dev->mtu; 1291 /* 1292 * MTU assignment will be handled in team_dev_type_check_change 1293 * if dev and port_dev are of different types 1294 */ 1295 if (dev->type == port_dev->type) { 1296 err = dev_set_mtu(port_dev, dev->mtu); 1297 if (err) { 1298 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err); 1299 goto err_set_mtu; 1300 } 1301 } 1302 1303 memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len); 1304 1305 err = team_port_enter(team, port); 1306 if (err) { 1307 netdev_err(dev, "Device %s failed to enter team mode\n", 1308 portname); 1309 goto err_port_enter; 1310 } 1311 1312 err = dev_open(port_dev, extack); 1313 if (err) { 1314 netdev_dbg(dev, "Device %s opening failed\n", 1315 portname); 1316 goto err_dev_open; 1317 } 1318 1319 err = vlan_vids_add_by_dev(port_dev, dev); 1320 if (err) { 1321 netdev_err(dev, "Failed to add vlan ids to device %s\n", 1322 portname); 1323 goto err_vids_add; 1324 } 1325 1326 err = team_port_enable_netpoll(port); 1327 if (err) { 1328 netdev_err(dev, "Failed to enable netpoll on device %s\n", 1329 portname); 1330 goto err_enable_netpoll; 1331 } 1332 1333 if (!(dev->features & NETIF_F_LRO)) 1334 dev_disable_lro(port_dev); 1335 1336 err = netdev_rx_handler_register(port_dev, team_handle_frame, 1337 port); 1338 if (err) { 1339 netdev_err(dev, "Device %s failed to register rx_handler\n", 1340 portname); 1341 goto err_handler_register; 1342 } 1343 1344 err = team_upper_dev_link(team, port, extack); 1345 if (err) { 1346 netdev_err(dev, "Device %s failed to set upper link\n", 1347 portname); 1348 goto err_set_upper_link; 1349 } 1350 1351 err = __team_option_inst_add_port(team, port); 1352 if (err) { 1353 netdev_err(dev, "Device %s failed to add per-port options\n", 1354 portname); 1355 goto err_option_port_add; 1356 } 1357 1358 /* set promiscuity level to new slave */ 1359 if (dev->flags & IFF_PROMISC) { 1360 err = dev_set_promiscuity(port_dev, 1); 1361 if (err) 1362 goto err_set_slave_promisc; 1363 } 1364 1365 /* set allmulti level to new slave */ 1366 if (dev->flags & IFF_ALLMULTI) { 1367 err = dev_set_allmulti(port_dev, 1); 1368 if (err) { 1369 if (dev->flags & IFF_PROMISC) 1370 dev_set_promiscuity(port_dev, -1); 1371 goto err_set_slave_allmulti; 1372 } 1373 } 1374 1375 err = team_dev_type_check_change(dev, port_dev); 1376 if (err) 1377 goto err_set_dev_type; 1378 1379 if (dev->flags & IFF_UP) { 1380 netif_addr_lock_bh(dev); 1381 dev_uc_sync_multiple(port_dev, dev); 1382 dev_mc_sync_multiple(port_dev, dev); 1383 netif_addr_unlock_bh(dev); 1384 } 1385 1386 WRITE_ONCE(port->tx_index, -1); 1387 list_add_tail_rcu(&port->list, &team->port_list); 1388 team_port_enable(team, port); 1389 netdev_compute_master_upper_features(dev, true); 1390 netdev_lock_ops(port_dev); 1391 __team_port_change_port_added(port, !!netif_oper_up(port_dev)); 1392 netdev_unlock_ops(port_dev); 1393 __team_options_change_check(team); 1394 1395 netdev_info(dev, "Port device %s added\n", portname); 1396 1397 return 0; 1398 1399 err_set_dev_type: 1400 err_set_slave_allmulti: 1401 err_set_slave_promisc: 1402 __team_option_inst_del_port(team, port); 1403 1404 err_option_port_add: 1405 team_upper_dev_unlink(team, port); 1406 1407 err_set_upper_link: 1408 netdev_rx_handler_unregister(port_dev); 1409 1410 err_handler_register: 1411 team_port_disable_netpoll(port); 1412 1413 err_enable_netpoll: 1414 vlan_vids_del_by_dev(port_dev, dev); 1415 1416 err_vids_add: 1417 dev_close(port_dev); 1418 1419 err_dev_open: 1420 team_port_leave(team, port); 1421 team_port_set_orig_dev_addr(port); 1422 1423 err_port_enter: 1424 dev_set_mtu(port_dev, port->orig.mtu); 1425 1426 err_set_mtu: 1427 kfree(port); 1428 1429 return err; 1430 } 1431 1432 static void __team_port_change_port_removed(struct team_port *port); 1433 1434 static int team_port_del(struct team *team, struct net_device *port_dev, bool unregister) 1435 { 1436 struct net_device *dev = netdev_from_priv(team); 1437 struct team_port *port; 1438 char *portname = port_dev->name; 1439 1440 port = team_port_get_rtnl(port_dev); 1441 if (!port || !team_port_find(team, port)) { 1442 netdev_err(dev, "Device %s does not act as a port of this team\n", 1443 portname); 1444 return -ENOENT; 1445 } 1446 1447 team_port_disable(team, port); 1448 list_del_rcu(&port->list); 1449 1450 if (dev->flags & IFF_PROMISC) 1451 dev_set_promiscuity(port_dev, -1); 1452 if (dev->flags & IFF_ALLMULTI) 1453 dev_set_allmulti(port_dev, -1); 1454 1455 team_upper_dev_unlink(team, port); 1456 netdev_rx_handler_unregister(port_dev); 1457 team_port_disable_netpoll(port); 1458 vlan_vids_del_by_dev(port_dev, dev); 1459 if (dev->flags & IFF_UP) { 1460 dev_uc_unsync(port_dev, dev); 1461 dev_mc_unsync(port_dev, dev); 1462 } 1463 dev_close(port_dev); 1464 team_port_leave(team, port); 1465 1466 __team_option_inst_mark_removed_port(team, port); 1467 __team_options_change_check(team); 1468 __team_option_inst_del_port(team, port); 1469 __team_port_change_port_removed(port); 1470 1471 team_port_set_orig_dev_addr(port); 1472 if (unregister) { 1473 netdev_lock_ops(port_dev); 1474 __netif_set_mtu(port_dev, port->orig.mtu); 1475 netdev_unlock_ops(port_dev); 1476 } else { 1477 dev_set_mtu(port_dev, port->orig.mtu); 1478 } 1479 kfree_rcu(port, rcu); 1480 netdev_info(dev, "Port device %s removed\n", portname); 1481 netdev_compute_master_upper_features(dev, true); 1482 1483 return 0; 1484 } 1485 1486 1487 /***************** 1488 * Net device ops 1489 *****************/ 1490 1491 static void team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx) 1492 { 1493 ctx->data.str_val = team->mode->kind; 1494 } 1495 1496 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx) 1497 { 1498 return team_change_mode(team, ctx->data.str_val); 1499 } 1500 1501 static void team_notify_peers_count_get(struct team *team, 1502 struct team_gsetter_ctx *ctx) 1503 { 1504 ctx->data.u32_val = team->notify_peers.count; 1505 } 1506 1507 static int team_notify_peers_count_set(struct team *team, 1508 struct team_gsetter_ctx *ctx) 1509 { 1510 team->notify_peers.count = ctx->data.u32_val; 1511 return 0; 1512 } 1513 1514 static void team_notify_peers_interval_get(struct team *team, 1515 struct team_gsetter_ctx *ctx) 1516 { 1517 ctx->data.u32_val = team->notify_peers.interval; 1518 } 1519 1520 static int team_notify_peers_interval_set(struct team *team, 1521 struct team_gsetter_ctx *ctx) 1522 { 1523 team->notify_peers.interval = ctx->data.u32_val; 1524 return 0; 1525 } 1526 1527 static void team_mcast_rejoin_count_get(struct team *team, 1528 struct team_gsetter_ctx *ctx) 1529 { 1530 ctx->data.u32_val = team->mcast_rejoin.count; 1531 } 1532 1533 static int team_mcast_rejoin_count_set(struct team *team, 1534 struct team_gsetter_ctx *ctx) 1535 { 1536 team->mcast_rejoin.count = ctx->data.u32_val; 1537 return 0; 1538 } 1539 1540 static void team_mcast_rejoin_interval_get(struct team *team, 1541 struct team_gsetter_ctx *ctx) 1542 { 1543 ctx->data.u32_val = team->mcast_rejoin.interval; 1544 } 1545 1546 static int team_mcast_rejoin_interval_set(struct team *team, 1547 struct team_gsetter_ctx *ctx) 1548 { 1549 team->mcast_rejoin.interval = ctx->data.u32_val; 1550 return 0; 1551 } 1552 1553 static void team_port_en_option_get(struct team *team, 1554 struct team_gsetter_ctx *ctx) 1555 { 1556 struct team_port *port = ctx->info->port; 1557 1558 ctx->data.bool_val = team_port_enabled(port); 1559 } 1560 1561 static int team_port_en_option_set(struct team *team, 1562 struct team_gsetter_ctx *ctx) 1563 { 1564 struct team_port *port = ctx->info->port; 1565 1566 if (ctx->data.bool_val) 1567 team_port_enable(team, port); 1568 else 1569 team_port_disable(team, port); 1570 return 0; 1571 } 1572 1573 static void team_port_rx_en_option_get(struct team *team, 1574 struct team_gsetter_ctx *ctx) 1575 { 1576 struct team_port *port = ctx->info->port; 1577 1578 ctx->data.bool_val = team_port_rx_enabled(port); 1579 } 1580 1581 static int team_port_rx_en_option_set(struct team *team, 1582 struct team_gsetter_ctx *ctx) 1583 { 1584 struct team_port *port = ctx->info->port; 1585 1586 if (ctx->data.bool_val) 1587 team_port_enable_rx(team, port); 1588 else 1589 team_port_disable_rx(team, port); 1590 return 0; 1591 } 1592 1593 static void team_port_tx_en_option_get(struct team *team, 1594 struct team_gsetter_ctx *ctx) 1595 { 1596 struct team_port *port = ctx->info->port; 1597 1598 ctx->data.bool_val = team_port_tx_enabled(port); 1599 } 1600 1601 static int team_port_tx_en_option_set(struct team *team, 1602 struct team_gsetter_ctx *ctx) 1603 { 1604 struct team_port *port = ctx->info->port; 1605 1606 if (ctx->data.bool_val) 1607 team_port_enable_tx(team, port); 1608 else 1609 team_port_disable_tx(team, port); 1610 return 0; 1611 } 1612 1613 static void team_user_linkup_option_get(struct team *team, 1614 struct team_gsetter_ctx *ctx) 1615 { 1616 struct team_port *port = ctx->info->port; 1617 1618 ctx->data.bool_val = port->user.linkup; 1619 } 1620 1621 static void __team_carrier_check(struct team *team); 1622 1623 static int team_user_linkup_option_set(struct team *team, 1624 struct team_gsetter_ctx *ctx) 1625 { 1626 struct team_port *port = ctx->info->port; 1627 1628 port->user.linkup = ctx->data.bool_val; 1629 team_refresh_port_linkup(port); 1630 __team_carrier_check(port->team); 1631 return 0; 1632 } 1633 1634 static void team_user_linkup_en_option_get(struct team *team, 1635 struct team_gsetter_ctx *ctx) 1636 { 1637 struct team_port *port = ctx->info->port; 1638 1639 ctx->data.bool_val = port->user.linkup_enabled; 1640 } 1641 1642 static int team_user_linkup_en_option_set(struct team *team, 1643 struct team_gsetter_ctx *ctx) 1644 { 1645 struct team_port *port = ctx->info->port; 1646 1647 port->user.linkup_enabled = ctx->data.bool_val; 1648 team_refresh_port_linkup(port); 1649 __team_carrier_check(port->team); 1650 return 0; 1651 } 1652 1653 static void team_priority_option_get(struct team *team, 1654 struct team_gsetter_ctx *ctx) 1655 { 1656 struct team_port *port = ctx->info->port; 1657 1658 ctx->data.s32_val = port->priority; 1659 } 1660 1661 static int team_priority_option_set(struct team *team, 1662 struct team_gsetter_ctx *ctx) 1663 { 1664 struct team_port *port = ctx->info->port; 1665 s32 priority = ctx->data.s32_val; 1666 1667 if (port->priority == priority) 1668 return 0; 1669 port->priority = priority; 1670 team_queue_override_port_prio_changed(team, port); 1671 return 0; 1672 } 1673 1674 static void team_queue_id_option_get(struct team *team, 1675 struct team_gsetter_ctx *ctx) 1676 { 1677 struct team_port *port = ctx->info->port; 1678 1679 ctx->data.u32_val = port->queue_id; 1680 } 1681 1682 static int team_queue_id_option_set(struct team *team, 1683 struct team_gsetter_ctx *ctx) 1684 { 1685 struct team_port *port = ctx->info->port; 1686 u16 new_queue_id = ctx->data.u32_val; 1687 1688 if (port->queue_id == new_queue_id) 1689 return 0; 1690 if (new_queue_id >= netdev_from_priv(team)->real_num_tx_queues) 1691 return -EINVAL; 1692 team_queue_override_port_change_queue_id(team, port, new_queue_id); 1693 return 0; 1694 } 1695 1696 static const struct team_option team_options[] = { 1697 { 1698 .name = "mode", 1699 .type = TEAM_OPTION_TYPE_STRING, 1700 .getter = team_mode_option_get, 1701 .setter = team_mode_option_set, 1702 }, 1703 { 1704 .name = "notify_peers_count", 1705 .type = TEAM_OPTION_TYPE_U32, 1706 .getter = team_notify_peers_count_get, 1707 .setter = team_notify_peers_count_set, 1708 }, 1709 { 1710 .name = "notify_peers_interval", 1711 .type = TEAM_OPTION_TYPE_U32, 1712 .getter = team_notify_peers_interval_get, 1713 .setter = team_notify_peers_interval_set, 1714 }, 1715 { 1716 .name = "mcast_rejoin_count", 1717 .type = TEAM_OPTION_TYPE_U32, 1718 .getter = team_mcast_rejoin_count_get, 1719 .setter = team_mcast_rejoin_count_set, 1720 }, 1721 { 1722 .name = "mcast_rejoin_interval", 1723 .type = TEAM_OPTION_TYPE_U32, 1724 .getter = team_mcast_rejoin_interval_get, 1725 .setter = team_mcast_rejoin_interval_set, 1726 }, 1727 { 1728 .name = "enabled", 1729 .type = TEAM_OPTION_TYPE_BOOL, 1730 .per_port = true, 1731 .getter = team_port_en_option_get, 1732 .setter = team_port_en_option_set, 1733 }, 1734 { 1735 .name = "rx_enabled", 1736 .type = TEAM_OPTION_TYPE_BOOL, 1737 .per_port = true, 1738 .getter = team_port_rx_en_option_get, 1739 .setter = team_port_rx_en_option_set, 1740 }, 1741 { 1742 .name = "tx_enabled", 1743 .type = TEAM_OPTION_TYPE_BOOL, 1744 .per_port = true, 1745 .getter = team_port_tx_en_option_get, 1746 .setter = team_port_tx_en_option_set, 1747 }, 1748 { 1749 .name = "user_linkup", 1750 .type = TEAM_OPTION_TYPE_BOOL, 1751 .per_port = true, 1752 .getter = team_user_linkup_option_get, 1753 .setter = team_user_linkup_option_set, 1754 }, 1755 { 1756 .name = "user_linkup_enabled", 1757 .type = TEAM_OPTION_TYPE_BOOL, 1758 .per_port = true, 1759 .getter = team_user_linkup_en_option_get, 1760 .setter = team_user_linkup_en_option_set, 1761 }, 1762 { 1763 .name = "priority", 1764 .type = TEAM_OPTION_TYPE_S32, 1765 .per_port = true, 1766 .getter = team_priority_option_get, 1767 .setter = team_priority_option_set, 1768 }, 1769 { 1770 .name = "queue_id", 1771 .type = TEAM_OPTION_TYPE_U32, 1772 .per_port = true, 1773 .getter = team_queue_id_option_get, 1774 .setter = team_queue_id_option_set, 1775 }, 1776 }; 1777 1778 1779 static int team_init(struct net_device *dev) 1780 { 1781 struct team *team = netdev_priv(dev); 1782 int i; 1783 int err; 1784 1785 team_set_no_mode(team); 1786 team->notifier_ctx = false; 1787 1788 team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats); 1789 if (!team->pcpu_stats) 1790 return -ENOMEM; 1791 1792 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++) 1793 INIT_HLIST_HEAD(&team->tx_en_port_hlist[i]); 1794 INIT_LIST_HEAD(&team->port_list); 1795 err = team_queue_override_init(team); 1796 if (err) 1797 goto err_team_queue_override_init; 1798 1799 team_adjust_ops(team); 1800 1801 INIT_LIST_HEAD(&team->option_list); 1802 INIT_LIST_HEAD(&team->option_inst_list); 1803 1804 team_notify_peers_init(team); 1805 team_mcast_rejoin_init(team); 1806 1807 err = team_options_register(team, team_options, ARRAY_SIZE(team_options)); 1808 if (err) 1809 goto err_options_register; 1810 netif_carrier_off(dev); 1811 1812 netdev_lockdep_set_classes(dev); 1813 1814 return 0; 1815 1816 err_options_register: 1817 team_mcast_rejoin_fini(team); 1818 team_notify_peers_fini(team); 1819 team_queue_override_fini(team); 1820 err_team_queue_override_init: 1821 free_percpu(team->pcpu_stats); 1822 1823 return err; 1824 } 1825 1826 static void team_uninit(struct net_device *dev) 1827 { 1828 struct team *team = netdev_priv(dev); 1829 struct team_port *port; 1830 struct team_port *tmp; 1831 1832 ASSERT_RTNL(); 1833 1834 list_for_each_entry_safe(port, tmp, &team->port_list, list) 1835 team_port_del(team, port->dev, false); 1836 1837 __team_change_mode(team, NULL); /* cleanup */ 1838 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options)); 1839 team_mcast_rejoin_fini(team); 1840 team_notify_peers_fini(team); 1841 team_queue_override_fini(team); 1842 netdev_change_features(dev); 1843 } 1844 1845 static void team_destructor(struct net_device *dev) 1846 { 1847 struct team *team = netdev_priv(dev); 1848 1849 free_percpu(team->pcpu_stats); 1850 } 1851 1852 static int team_open(struct net_device *dev) 1853 { 1854 return 0; 1855 } 1856 1857 static int team_close(struct net_device *dev) 1858 { 1859 struct team *team = netdev_priv(dev); 1860 struct team_port *port; 1861 1862 list_for_each_entry(port, &team->port_list, list) { 1863 dev_uc_unsync(port->dev, dev); 1864 dev_mc_unsync(port->dev, dev); 1865 } 1866 1867 return 0; 1868 } 1869 1870 /* 1871 * note: already called with rcu_read_lock 1872 */ 1873 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev) 1874 { 1875 struct team *team = netdev_priv(dev); 1876 bool tx_success; 1877 unsigned int len = skb->len; 1878 1879 if (!team_queue_override_transmit(team, skb, &tx_success)) 1880 tx_success = READ_ONCE(team->ops.transmit)(team, skb); 1881 if (tx_success) { 1882 struct team_pcpu_stats *pcpu_stats; 1883 1884 pcpu_stats = this_cpu_ptr(team->pcpu_stats); 1885 u64_stats_update_begin(&pcpu_stats->syncp); 1886 u64_stats_inc(&pcpu_stats->tx_packets); 1887 u64_stats_add(&pcpu_stats->tx_bytes, len); 1888 u64_stats_update_end(&pcpu_stats->syncp); 1889 } else { 1890 this_cpu_inc(team->pcpu_stats->tx_dropped); 1891 } 1892 1893 return NETDEV_TX_OK; 1894 } 1895 1896 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb, 1897 struct net_device *sb_dev) 1898 { 1899 /* 1900 * This helper function exists to help dev_pick_tx get the correct 1901 * destination queue. Using a helper function skips a call to 1902 * skb_tx_hash and will put the skbs in the queue we expect on their 1903 * way down to the team driver. 1904 */ 1905 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0; 1906 1907 /* 1908 * Save the original txq to restore before passing to the driver 1909 */ 1910 qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping; 1911 1912 if (unlikely(txq >= dev->real_num_tx_queues)) { 1913 do { 1914 txq -= dev->real_num_tx_queues; 1915 } while (txq >= dev->real_num_tx_queues); 1916 } 1917 return txq; 1918 } 1919 1920 static void team_change_rx_flags(struct net_device *dev, int change) 1921 { 1922 struct team *team = netdev_priv(dev); 1923 struct team_port *port; 1924 int inc; 1925 1926 ASSERT_RTNL(); 1927 1928 list_for_each_entry(port, &team->port_list, list) { 1929 if (change & IFF_PROMISC) { 1930 inc = dev->flags & IFF_PROMISC ? 1 : -1; 1931 dev_set_promiscuity(port->dev, inc); 1932 } 1933 if (change & IFF_ALLMULTI) { 1934 inc = dev->flags & IFF_ALLMULTI ? 1 : -1; 1935 dev_set_allmulti(port->dev, inc); 1936 } 1937 } 1938 } 1939 1940 static void team_set_rx_mode(struct net_device *dev) 1941 { 1942 struct team *team = netdev_priv(dev); 1943 struct team_port *port; 1944 1945 rcu_read_lock(); 1946 list_for_each_entry_rcu(port, &team->port_list, list) { 1947 dev_uc_sync_multiple(port->dev, dev); 1948 dev_mc_sync_multiple(port->dev, dev); 1949 } 1950 rcu_read_unlock(); 1951 } 1952 1953 static int team_set_mac_address(struct net_device *dev, void *p) 1954 { 1955 struct sockaddr *addr = p; 1956 struct team *team = netdev_priv(dev); 1957 struct team_port *port; 1958 1959 ASSERT_RTNL(); 1960 1961 if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data)) 1962 return -EADDRNOTAVAIL; 1963 dev_addr_set(dev, addr->sa_data); 1964 list_for_each_entry(port, &team->port_list, list) 1965 if (team->ops.port_change_dev_addr) 1966 team->ops.port_change_dev_addr(team, port); 1967 return 0; 1968 } 1969 1970 static int team_change_mtu(struct net_device *dev, int new_mtu) 1971 { 1972 struct team *team = netdev_priv(dev); 1973 struct team_port *port; 1974 int err; 1975 1976 ASSERT_RTNL(); 1977 1978 team->port_mtu_change_allowed = true; 1979 list_for_each_entry(port, &team->port_list, list) { 1980 err = dev_set_mtu(port->dev, new_mtu); 1981 if (err) { 1982 netdev_err(dev, "Device %s failed to change mtu", 1983 port->dev->name); 1984 goto unwind; 1985 } 1986 } 1987 team->port_mtu_change_allowed = false; 1988 1989 WRITE_ONCE(dev->mtu, new_mtu); 1990 1991 return 0; 1992 1993 unwind: 1994 list_for_each_entry_continue_reverse(port, &team->port_list, list) 1995 dev_set_mtu(port->dev, dev->mtu); 1996 team->port_mtu_change_allowed = false; 1997 1998 return err; 1999 } 2000 2001 static void 2002 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 2003 { 2004 struct team *team = netdev_priv(dev); 2005 struct team_pcpu_stats *p; 2006 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes; 2007 u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0; 2008 unsigned int start; 2009 int i; 2010 2011 for_each_possible_cpu(i) { 2012 p = per_cpu_ptr(team->pcpu_stats, i); 2013 do { 2014 start = u64_stats_fetch_begin(&p->syncp); 2015 rx_packets = u64_stats_read(&p->rx_packets); 2016 rx_bytes = u64_stats_read(&p->rx_bytes); 2017 rx_multicast = u64_stats_read(&p->rx_multicast); 2018 tx_packets = u64_stats_read(&p->tx_packets); 2019 tx_bytes = u64_stats_read(&p->tx_bytes); 2020 } while (u64_stats_fetch_retry(&p->syncp, start)); 2021 2022 stats->rx_packets += rx_packets; 2023 stats->rx_bytes += rx_bytes; 2024 stats->multicast += rx_multicast; 2025 stats->tx_packets += tx_packets; 2026 stats->tx_bytes += tx_bytes; 2027 /* 2028 * rx_dropped, tx_dropped & rx_nohandler are u32, 2029 * updated without syncp protection. 2030 */ 2031 rx_dropped += READ_ONCE(p->rx_dropped); 2032 tx_dropped += READ_ONCE(p->tx_dropped); 2033 rx_nohandler += READ_ONCE(p->rx_nohandler); 2034 } 2035 stats->rx_dropped = rx_dropped; 2036 stats->tx_dropped = tx_dropped; 2037 stats->rx_nohandler = rx_nohandler; 2038 } 2039 2040 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) 2041 { 2042 struct team *team = netdev_priv(dev); 2043 struct team_port *port; 2044 int err; 2045 2046 ASSERT_RTNL(); 2047 2048 list_for_each_entry(port, &team->port_list, list) { 2049 err = vlan_vid_add(port->dev, proto, vid); 2050 if (err) 2051 goto unwind; 2052 } 2053 2054 return 0; 2055 2056 unwind: 2057 list_for_each_entry_continue_reverse(port, &team->port_list, list) 2058 vlan_vid_del(port->dev, proto, vid); 2059 2060 return err; 2061 } 2062 2063 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid) 2064 { 2065 struct team *team = netdev_priv(dev); 2066 struct team_port *port; 2067 2068 ASSERT_RTNL(); 2069 2070 list_for_each_entry(port, &team->port_list, list) 2071 vlan_vid_del(port->dev, proto, vid); 2072 2073 return 0; 2074 } 2075 2076 #ifdef CONFIG_NET_POLL_CONTROLLER 2077 static void team_poll_controller(struct net_device *dev) 2078 { 2079 } 2080 2081 static void __team_netpoll_cleanup(struct team *team) 2082 { 2083 struct team_port *port; 2084 2085 list_for_each_entry(port, &team->port_list, list) 2086 team_port_disable_netpoll(port); 2087 } 2088 2089 static void team_netpoll_cleanup(struct net_device *dev) 2090 { 2091 struct team *team = netdev_priv(dev); 2092 2093 ASSERT_RTNL(); 2094 2095 __team_netpoll_cleanup(team); 2096 } 2097 2098 static int team_netpoll_setup(struct net_device *dev) 2099 { 2100 struct team *team = netdev_priv(dev); 2101 struct team_port *port; 2102 int err = 0; 2103 2104 ASSERT_RTNL(); 2105 2106 list_for_each_entry(port, &team->port_list, list) { 2107 err = __team_port_enable_netpoll(port); 2108 if (err) { 2109 __team_netpoll_cleanup(team); 2110 break; 2111 } 2112 } 2113 return err; 2114 } 2115 #endif 2116 2117 static int team_add_slave(struct net_device *dev, struct net_device *port_dev, 2118 struct netlink_ext_ack *extack) 2119 { 2120 struct team *team = netdev_priv(dev); 2121 2122 ASSERT_RTNL(); 2123 2124 return team_port_add(team, port_dev, extack); 2125 } 2126 2127 static int team_del_slave(struct net_device *dev, struct net_device *port_dev) 2128 { 2129 struct team *team = netdev_priv(dev); 2130 2131 ASSERT_RTNL(); 2132 2133 return team_port_del(team, port_dev, false); 2134 } 2135 2136 static int team_del_slave_on_unregister(struct net_device *dev, struct net_device *port_dev) 2137 { 2138 struct team *team = netdev_priv(dev); 2139 2140 ASSERT_RTNL(); 2141 2142 return team_port_del(team, port_dev, true); 2143 } 2144 2145 static netdev_features_t team_fix_features(struct net_device *dev, 2146 netdev_features_t features) 2147 { 2148 struct team_port *port; 2149 struct team *team = netdev_priv(dev); 2150 netdev_features_t mask; 2151 2152 mask = features; 2153 features = netdev_base_features(features); 2154 2155 rcu_read_lock(); 2156 list_for_each_entry_rcu(port, &team->port_list, list) { 2157 features = netdev_increment_features(features, 2158 port->dev->features, 2159 mask); 2160 } 2161 rcu_read_unlock(); 2162 2163 features = netdev_add_tso_features(features, mask); 2164 2165 return features; 2166 } 2167 2168 static int team_change_carrier(struct net_device *dev, bool new_carrier) 2169 { 2170 struct team *team = netdev_priv(dev); 2171 2172 team->user_carrier_enabled = true; 2173 2174 if (new_carrier) 2175 netif_carrier_on(dev); 2176 else 2177 netif_carrier_off(dev); 2178 return 0; 2179 } 2180 2181 static const struct net_device_ops team_netdev_ops = { 2182 .ndo_init = team_init, 2183 .ndo_uninit = team_uninit, 2184 .ndo_open = team_open, 2185 .ndo_stop = team_close, 2186 .ndo_start_xmit = team_xmit, 2187 .ndo_select_queue = team_select_queue, 2188 .ndo_change_rx_flags = team_change_rx_flags, 2189 .ndo_set_rx_mode = team_set_rx_mode, 2190 .ndo_set_mac_address = team_set_mac_address, 2191 .ndo_change_mtu = team_change_mtu, 2192 .ndo_get_stats64 = team_get_stats64, 2193 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid, 2194 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid, 2195 #ifdef CONFIG_NET_POLL_CONTROLLER 2196 .ndo_poll_controller = team_poll_controller, 2197 .ndo_netpoll_setup = team_netpoll_setup, 2198 .ndo_netpoll_cleanup = team_netpoll_cleanup, 2199 #endif 2200 .ndo_add_slave = team_add_slave, 2201 .ndo_del_slave = team_del_slave, 2202 .ndo_fix_features = team_fix_features, 2203 .ndo_change_carrier = team_change_carrier, 2204 .ndo_features_check = passthru_features_check, 2205 }; 2206 2207 /*********************** 2208 * ethtool interface 2209 ***********************/ 2210 2211 static void team_ethtool_get_drvinfo(struct net_device *dev, 2212 struct ethtool_drvinfo *drvinfo) 2213 { 2214 strscpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver)); 2215 } 2216 2217 static int team_ethtool_get_link_ksettings(struct net_device *dev, 2218 struct ethtool_link_ksettings *cmd) 2219 { 2220 struct team *team= netdev_priv(dev); 2221 unsigned long speed = 0; 2222 struct team_port *port; 2223 2224 cmd->base.duplex = DUPLEX_UNKNOWN; 2225 cmd->base.port = PORT_OTHER; 2226 2227 rcu_read_lock(); 2228 list_for_each_entry_rcu(port, &team->port_list, list) { 2229 if (team_port_txable(port)) { 2230 if (port->state.speed != SPEED_UNKNOWN) 2231 speed += port->state.speed; 2232 if (cmd->base.duplex == DUPLEX_UNKNOWN && 2233 port->state.duplex != DUPLEX_UNKNOWN) 2234 cmd->base.duplex = port->state.duplex; 2235 } 2236 } 2237 rcu_read_unlock(); 2238 2239 cmd->base.speed = speed ? : SPEED_UNKNOWN; 2240 2241 return 0; 2242 } 2243 2244 static const struct ethtool_ops team_ethtool_ops = { 2245 .get_drvinfo = team_ethtool_get_drvinfo, 2246 .get_link = ethtool_op_get_link, 2247 .get_link_ksettings = team_ethtool_get_link_ksettings, 2248 }; 2249 2250 /*********************** 2251 * rt netlink interface 2252 ***********************/ 2253 2254 /* For tx path we need a linkup && enabled port and for parse any port 2255 * suffices. 2256 */ 2257 static struct team_port *team_header_port_get_rcu(struct team *team, 2258 bool txable) 2259 { 2260 struct team_port *port; 2261 2262 list_for_each_entry_rcu(port, &team->port_list, list) { 2263 if (!txable || team_port_txable(port)) 2264 return port; 2265 } 2266 2267 return NULL; 2268 } 2269 2270 static int team_header_create(struct sk_buff *skb, struct net_device *team_dev, 2271 unsigned short type, const void *daddr, 2272 const void *saddr, unsigned int len) 2273 { 2274 struct team *team = netdev_priv(team_dev); 2275 const struct header_ops *port_ops; 2276 struct team_port *port; 2277 int ret = 0; 2278 2279 rcu_read_lock(); 2280 port = team_header_port_get_rcu(team, true); 2281 if (port) { 2282 port_ops = READ_ONCE(port->dev->header_ops); 2283 if (port_ops && port_ops->create) 2284 ret = port_ops->create(skb, port->dev, 2285 type, daddr, saddr, len); 2286 } 2287 rcu_read_unlock(); 2288 return ret; 2289 } 2290 2291 static int team_header_parse(const struct sk_buff *skb, 2292 const struct net_device *team_dev, 2293 unsigned char *haddr) 2294 { 2295 struct team *team = netdev_priv(team_dev); 2296 const struct header_ops *port_ops; 2297 struct team_port *port; 2298 int ret = 0; 2299 2300 rcu_read_lock(); 2301 port = team_header_port_get_rcu(team, false); 2302 if (port) { 2303 port_ops = READ_ONCE(port->dev->header_ops); 2304 if (port_ops && port_ops->parse) 2305 ret = port_ops->parse(skb, port->dev, haddr); 2306 } 2307 rcu_read_unlock(); 2308 return ret; 2309 } 2310 2311 static const struct header_ops team_header_ops = { 2312 .create = team_header_create, 2313 .parse = team_header_parse, 2314 }; 2315 2316 static void team_setup_by_port(struct net_device *dev, 2317 struct net_device *port_dev) 2318 { 2319 struct team *team = netdev_priv(dev); 2320 2321 if (port_dev->type == ARPHRD_ETHER) 2322 dev->header_ops = team->header_ops_cache; 2323 else 2324 dev->header_ops = port_dev->header_ops ? 2325 &team_header_ops : NULL; 2326 dev->type = port_dev->type; 2327 dev->hard_header_len = port_dev->hard_header_len; 2328 dev->needed_headroom = port_dev->needed_headroom; 2329 dev->addr_len = port_dev->addr_len; 2330 dev->mtu = port_dev->mtu; 2331 memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len); 2332 eth_hw_addr_inherit(dev, port_dev); 2333 2334 if (port_dev->flags & IFF_POINTOPOINT) { 2335 dev->flags &= ~(IFF_BROADCAST | IFF_MULTICAST); 2336 dev->flags |= (IFF_POINTOPOINT | IFF_NOARP); 2337 } else if ((port_dev->flags & (IFF_BROADCAST | IFF_MULTICAST)) == 2338 (IFF_BROADCAST | IFF_MULTICAST)) { 2339 dev->flags |= (IFF_BROADCAST | IFF_MULTICAST); 2340 dev->flags &= ~(IFF_POINTOPOINT | IFF_NOARP); 2341 } 2342 } 2343 2344 static int team_dev_type_check_change(struct net_device *dev, 2345 struct net_device *port_dev) 2346 { 2347 struct team *team = netdev_priv(dev); 2348 char *portname = port_dev->name; 2349 int err; 2350 2351 if (dev->type == port_dev->type) 2352 return 0; 2353 if (!list_empty(&team->port_list)) { 2354 netdev_err(dev, "Device %s is of different type\n", portname); 2355 return -EBUSY; 2356 } 2357 err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev); 2358 err = notifier_to_errno(err); 2359 if (err) { 2360 netdev_err(dev, "Refused to change device type\n"); 2361 return err; 2362 } 2363 dev_uc_flush(dev); 2364 dev_mc_flush(dev); 2365 team_setup_by_port(dev, port_dev); 2366 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev); 2367 return 0; 2368 } 2369 2370 static void team_setup(struct net_device *dev) 2371 { 2372 struct team *team = netdev_priv(dev); 2373 2374 ether_setup(dev); 2375 dev->max_mtu = ETH_MAX_MTU; 2376 team->header_ops_cache = dev->header_ops; 2377 2378 dev->netdev_ops = &team_netdev_ops; 2379 dev->ethtool_ops = &team_ethtool_ops; 2380 dev->needs_free_netdev = true; 2381 dev->priv_destructor = team_destructor; 2382 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); 2383 dev->priv_flags |= IFF_NO_QUEUE; 2384 dev->priv_flags |= IFF_TEAM; 2385 2386 /* 2387 * Indicate we support unicast address filtering. That way core won't 2388 * bring us to promisc mode in case a unicast addr is added. 2389 * Let this up to underlay drivers. 2390 */ 2391 dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE; 2392 dev->lltx = true; 2393 2394 /* Don't allow team devices to change network namespaces. */ 2395 dev->netns_immutable = true; 2396 2397 dev->features |= NETIF_F_GRO; 2398 2399 dev->hw_features = MASTER_UPPER_DEV_VLAN_FEATURES | 2400 NETIF_F_HW_VLAN_CTAG_RX | 2401 NETIF_F_HW_VLAN_CTAG_FILTER | 2402 NETIF_F_HW_VLAN_STAG_RX | 2403 NETIF_F_HW_VLAN_STAG_FILTER; 2404 2405 dev->hw_features |= NETIF_F_GSO_ENCAP_ALL; 2406 dev->features |= dev->hw_features; 2407 dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; 2408 } 2409 2410 static int team_newlink(struct net_device *dev, 2411 struct rtnl_newlink_params *params, 2412 struct netlink_ext_ack *extack) 2413 { 2414 struct nlattr **tb = params->tb; 2415 2416 if (tb[IFLA_ADDRESS] == NULL) 2417 eth_hw_addr_random(dev); 2418 2419 return register_netdevice(dev); 2420 } 2421 2422 static int team_validate(struct nlattr *tb[], struct nlattr *data[], 2423 struct netlink_ext_ack *extack) 2424 { 2425 if (tb[IFLA_ADDRESS]) { 2426 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) 2427 return -EINVAL; 2428 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) 2429 return -EADDRNOTAVAIL; 2430 } 2431 return 0; 2432 } 2433 2434 static unsigned int team_get_num_tx_queues(void) 2435 { 2436 return TEAM_DEFAULT_NUM_TX_QUEUES; 2437 } 2438 2439 static unsigned int team_get_num_rx_queues(void) 2440 { 2441 return TEAM_DEFAULT_NUM_RX_QUEUES; 2442 } 2443 2444 static struct rtnl_link_ops team_link_ops __read_mostly = { 2445 .kind = DRV_NAME, 2446 .priv_size = sizeof(struct team), 2447 .setup = team_setup, 2448 .newlink = team_newlink, 2449 .validate = team_validate, 2450 .get_num_tx_queues = team_get_num_tx_queues, 2451 .get_num_rx_queues = team_get_num_rx_queues, 2452 }; 2453 2454 2455 /*********************************** 2456 * Generic netlink custom interface 2457 ***********************************/ 2458 2459 static struct genl_family team_nl_family; 2460 2461 int team_nl_noop_doit(struct sk_buff *skb, struct genl_info *info) 2462 { 2463 struct sk_buff *msg; 2464 void *hdr; 2465 int err; 2466 2467 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 2468 if (!msg) 2469 return -ENOMEM; 2470 2471 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq, 2472 &team_nl_family, 0, TEAM_CMD_NOOP); 2473 if (!hdr) { 2474 err = -EMSGSIZE; 2475 goto err_msg_put; 2476 } 2477 2478 genlmsg_end(msg, hdr); 2479 2480 return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid); 2481 2482 err_msg_put: 2483 nlmsg_free(msg); 2484 2485 return err; 2486 } 2487 2488 /* 2489 * Netlink cmd functions should be locked by following two functions. 2490 * Since dev gets held here, that ensures dev won't disappear in between. 2491 */ 2492 static struct team *team_nl_team_get(struct genl_info *info) 2493 { 2494 struct net *net = genl_info_net(info); 2495 struct net_device *dev; 2496 int ifindex; 2497 2498 ASSERT_RTNL(); 2499 2500 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX]) 2501 return NULL; 2502 2503 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]); 2504 dev = dev_get_by_index(net, ifindex); 2505 if (!dev || dev->netdev_ops != &team_netdev_ops) { 2506 dev_put(dev); 2507 return NULL; 2508 } 2509 2510 return netdev_priv(dev); 2511 } 2512 2513 static void team_nl_team_put(struct team *team) 2514 { 2515 dev_put(netdev_from_priv(team)); 2516 } 2517 2518 typedef int team_nl_send_func_t(struct sk_buff *skb, 2519 struct team *team, u32 portid); 2520 2521 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid) 2522 { 2523 return genlmsg_unicast(dev_net(netdev_from_priv(team)), skb, portid); 2524 } 2525 2526 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team, 2527 struct team_option_inst *opt_inst) 2528 { 2529 struct nlattr *option_item; 2530 struct team_option *option = opt_inst->option; 2531 struct team_option_inst_info *opt_inst_info = &opt_inst->info; 2532 struct team_gsetter_ctx ctx; 2533 int err; 2534 2535 ctx.info = opt_inst_info; 2536 err = team_option_get(team, opt_inst, &ctx); 2537 if (err) 2538 return err; 2539 2540 option_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_OPTION); 2541 if (!option_item) 2542 return -EMSGSIZE; 2543 2544 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name)) 2545 goto nest_cancel; 2546 if (opt_inst_info->port && 2547 nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX, 2548 opt_inst_info->port->dev->ifindex)) 2549 goto nest_cancel; 2550 if (opt_inst->option->array_size && 2551 nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX, 2552 opt_inst_info->array_index)) 2553 goto nest_cancel; 2554 2555 switch (option->type) { 2556 case TEAM_OPTION_TYPE_U32: 2557 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32)) 2558 goto nest_cancel; 2559 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val)) 2560 goto nest_cancel; 2561 break; 2562 case TEAM_OPTION_TYPE_STRING: 2563 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING)) 2564 goto nest_cancel; 2565 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA, 2566 ctx.data.str_val)) 2567 goto nest_cancel; 2568 break; 2569 case TEAM_OPTION_TYPE_BINARY: 2570 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY)) 2571 goto nest_cancel; 2572 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len, 2573 ctx.data.bin_val.ptr)) 2574 goto nest_cancel; 2575 break; 2576 case TEAM_OPTION_TYPE_BOOL: 2577 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG)) 2578 goto nest_cancel; 2579 if (ctx.data.bool_val && 2580 nla_put_flag(skb, TEAM_ATTR_OPTION_DATA)) 2581 goto nest_cancel; 2582 break; 2583 case TEAM_OPTION_TYPE_S32: 2584 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32)) 2585 goto nest_cancel; 2586 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val)) 2587 goto nest_cancel; 2588 break; 2589 default: 2590 BUG(); 2591 } 2592 if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED)) 2593 goto nest_cancel; 2594 if (opt_inst->changed) { 2595 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED)) 2596 goto nest_cancel; 2597 opt_inst->changed = false; 2598 } 2599 nla_nest_end(skb, option_item); 2600 return 0; 2601 2602 nest_cancel: 2603 nla_nest_cancel(skb, option_item); 2604 return -EMSGSIZE; 2605 } 2606 2607 static int __send_and_alloc_skb(struct sk_buff **pskb, 2608 struct team *team, u32 portid, 2609 team_nl_send_func_t *send_func) 2610 { 2611 int err; 2612 2613 if (*pskb) { 2614 err = send_func(*pskb, team, portid); 2615 if (err) 2616 return err; 2617 } 2618 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL); 2619 if (!*pskb) 2620 return -ENOMEM; 2621 return 0; 2622 } 2623 2624 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq, 2625 int flags, team_nl_send_func_t *send_func, 2626 struct list_head *sel_opt_inst_list) 2627 { 2628 struct nlattr *option_list; 2629 struct nlmsghdr *nlh; 2630 void *hdr; 2631 struct team_option_inst *opt_inst; 2632 int err; 2633 struct sk_buff *skb = NULL; 2634 bool incomplete; 2635 int i; 2636 2637 opt_inst = list_first_entry(sel_opt_inst_list, 2638 struct team_option_inst, tmp_list); 2639 2640 start_again: 2641 err = __send_and_alloc_skb(&skb, team, portid, send_func); 2642 if (err) 2643 return err; 2644 2645 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI, 2646 TEAM_CMD_OPTIONS_GET); 2647 if (!hdr) { 2648 nlmsg_free(skb); 2649 return -EMSGSIZE; 2650 } 2651 2652 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, 2653 netdev_from_priv(team)->ifindex)) 2654 goto nla_put_failure; 2655 option_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_OPTION); 2656 if (!option_list) 2657 goto nla_put_failure; 2658 2659 i = 0; 2660 incomplete = false; 2661 list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) { 2662 err = team_nl_fill_one_option_get(skb, team, opt_inst); 2663 if (err) { 2664 if (err == -EMSGSIZE) { 2665 if (!i) 2666 goto errout; 2667 incomplete = true; 2668 break; 2669 } 2670 goto errout; 2671 } 2672 i++; 2673 } 2674 2675 nla_nest_end(skb, option_list); 2676 genlmsg_end(skb, hdr); 2677 if (incomplete) 2678 goto start_again; 2679 2680 send_done: 2681 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI); 2682 if (!nlh) { 2683 err = __send_and_alloc_skb(&skb, team, portid, send_func); 2684 if (err) 2685 return err; 2686 goto send_done; 2687 } 2688 2689 return send_func(skb, team, portid); 2690 2691 nla_put_failure: 2692 err = -EMSGSIZE; 2693 errout: 2694 nlmsg_free(skb); 2695 return err; 2696 } 2697 2698 int team_nl_options_get_doit(struct sk_buff *skb, struct genl_info *info) 2699 { 2700 struct team *team; 2701 struct team_option_inst *opt_inst; 2702 int err; 2703 LIST_HEAD(sel_opt_inst_list); 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 list_for_each_entry(opt_inst, &team->option_inst_list, list) 2714 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list); 2715 err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq, 2716 NLM_F_ACK, team_nl_send_unicast, 2717 &sel_opt_inst_list); 2718 2719 team_nl_team_put(team); 2720 2721 rtnl_unlock: 2722 rtnl_unlock(); 2723 2724 return err; 2725 } 2726 2727 static int team_nl_send_event_options_get(struct team *team, 2728 struct list_head *sel_opt_inst_list); 2729 2730 int team_nl_options_set_doit(struct sk_buff *skb, struct genl_info *info) 2731 { 2732 struct team *team; 2733 int err = 0; 2734 int i; 2735 struct nlattr *nl_option; 2736 2737 rtnl_lock(); 2738 2739 team = team_nl_team_get(info); 2740 if (!team) { 2741 err = -EINVAL; 2742 goto rtnl_unlock; 2743 } 2744 2745 err = -EINVAL; 2746 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) { 2747 err = -EINVAL; 2748 goto team_put; 2749 } 2750 2751 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) { 2752 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1]; 2753 struct nlattr *attr; 2754 struct nlattr *attr_data; 2755 LIST_HEAD(opt_inst_list); 2756 enum team_option_type opt_type; 2757 int opt_port_ifindex = 0; /* != 0 for per-port options */ 2758 u32 opt_array_index = 0; 2759 bool opt_is_array = false; 2760 struct team_option_inst *opt_inst; 2761 char *opt_name; 2762 bool opt_found = false; 2763 2764 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) { 2765 err = -EINVAL; 2766 goto team_put; 2767 } 2768 err = nla_parse_nested_deprecated(opt_attrs, 2769 TEAM_ATTR_OPTION_MAX, 2770 nl_option, 2771 team_attr_option_nl_policy, 2772 info->extack); 2773 if (err) 2774 goto team_put; 2775 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] || 2776 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) { 2777 err = -EINVAL; 2778 goto team_put; 2779 } 2780 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) { 2781 case NLA_U32: 2782 opt_type = TEAM_OPTION_TYPE_U32; 2783 break; 2784 case NLA_STRING: 2785 opt_type = TEAM_OPTION_TYPE_STRING; 2786 break; 2787 case NLA_BINARY: 2788 opt_type = TEAM_OPTION_TYPE_BINARY; 2789 break; 2790 case NLA_FLAG: 2791 opt_type = TEAM_OPTION_TYPE_BOOL; 2792 break; 2793 case NLA_S32: 2794 opt_type = TEAM_OPTION_TYPE_S32; 2795 break; 2796 default: 2797 goto team_put; 2798 } 2799 2800 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA]; 2801 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) { 2802 err = -EINVAL; 2803 goto team_put; 2804 } 2805 2806 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]); 2807 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX]; 2808 if (attr) 2809 opt_port_ifindex = nla_get_u32(attr); 2810 2811 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX]; 2812 if (attr) { 2813 opt_is_array = true; 2814 opt_array_index = nla_get_u32(attr); 2815 } 2816 2817 list_for_each_entry(opt_inst, &team->option_inst_list, list) { 2818 struct team_option *option = opt_inst->option; 2819 struct team_gsetter_ctx ctx; 2820 struct team_option_inst_info *opt_inst_info; 2821 int tmp_ifindex; 2822 2823 opt_inst_info = &opt_inst->info; 2824 tmp_ifindex = opt_inst_info->port ? 2825 opt_inst_info->port->dev->ifindex : 0; 2826 if (option->type != opt_type || 2827 strcmp(option->name, opt_name) || 2828 tmp_ifindex != opt_port_ifindex || 2829 (option->array_size && !opt_is_array) || 2830 opt_inst_info->array_index != opt_array_index) 2831 continue; 2832 opt_found = true; 2833 ctx.info = opt_inst_info; 2834 switch (opt_type) { 2835 case TEAM_OPTION_TYPE_U32: 2836 ctx.data.u32_val = nla_get_u32(attr_data); 2837 break; 2838 case TEAM_OPTION_TYPE_STRING: 2839 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN || 2840 !memchr(nla_data(attr_data), '\0', 2841 nla_len(attr_data))) { 2842 err = -EINVAL; 2843 goto team_put; 2844 } 2845 ctx.data.str_val = nla_data(attr_data); 2846 break; 2847 case TEAM_OPTION_TYPE_BINARY: 2848 ctx.data.bin_val.len = nla_len(attr_data); 2849 ctx.data.bin_val.ptr = nla_data(attr_data); 2850 break; 2851 case TEAM_OPTION_TYPE_BOOL: 2852 ctx.data.bool_val = attr_data ? true : false; 2853 break; 2854 case TEAM_OPTION_TYPE_S32: 2855 ctx.data.s32_val = nla_get_s32(attr_data); 2856 break; 2857 default: 2858 BUG(); 2859 } 2860 err = team_option_set(team, opt_inst, &ctx); 2861 if (err) 2862 goto team_put; 2863 opt_inst->changed = true; 2864 list_add(&opt_inst->tmp_list, &opt_inst_list); 2865 } 2866 if (!opt_found) { 2867 err = -ENOENT; 2868 goto team_put; 2869 } 2870 2871 err = team_nl_send_event_options_get(team, &opt_inst_list); 2872 if (err) 2873 break; 2874 } 2875 2876 team_put: 2877 team_nl_team_put(team); 2878 rtnl_unlock: 2879 rtnl_unlock(); 2880 return err; 2881 } 2882 2883 static int team_nl_fill_one_port_get(struct sk_buff *skb, 2884 struct team_port *port) 2885 { 2886 struct nlattr *port_item; 2887 2888 port_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_PORT); 2889 if (!port_item) 2890 goto nest_cancel; 2891 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex)) 2892 goto nest_cancel; 2893 if (port->changed) { 2894 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED)) 2895 goto nest_cancel; 2896 port->changed = false; 2897 } 2898 if ((port->removed && 2899 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) || 2900 (port->state.linkup && 2901 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) || 2902 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) || 2903 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex)) 2904 goto nest_cancel; 2905 nla_nest_end(skb, port_item); 2906 return 0; 2907 2908 nest_cancel: 2909 nla_nest_cancel(skb, port_item); 2910 return -EMSGSIZE; 2911 } 2912 2913 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq, 2914 int flags, team_nl_send_func_t *send_func, 2915 struct team_port *one_port) 2916 { 2917 struct nlattr *port_list; 2918 struct nlmsghdr *nlh; 2919 void *hdr; 2920 struct team_port *port; 2921 int err; 2922 struct sk_buff *skb = NULL; 2923 bool incomplete; 2924 int i; 2925 2926 port = list_first_entry_or_null(&team->port_list, 2927 struct team_port, list); 2928 2929 start_again: 2930 err = __send_and_alloc_skb(&skb, team, portid, send_func); 2931 if (err) 2932 return err; 2933 2934 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI, 2935 TEAM_CMD_PORT_LIST_GET); 2936 if (!hdr) { 2937 nlmsg_free(skb); 2938 return -EMSGSIZE; 2939 } 2940 2941 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, 2942 netdev_from_priv(team)->ifindex)) 2943 goto nla_put_failure; 2944 port_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_PORT); 2945 if (!port_list) 2946 goto nla_put_failure; 2947 2948 i = 0; 2949 incomplete = false; 2950 2951 /* If one port is selected, called wants to send port list containing 2952 * only this port. Otherwise go through all listed ports and send all 2953 */ 2954 if (one_port) { 2955 err = team_nl_fill_one_port_get(skb, one_port); 2956 if (err) 2957 goto errout; 2958 } else if (port) { 2959 list_for_each_entry_from(port, &team->port_list, list) { 2960 err = team_nl_fill_one_port_get(skb, port); 2961 if (err) { 2962 if (err == -EMSGSIZE) { 2963 if (!i) 2964 goto errout; 2965 incomplete = true; 2966 break; 2967 } 2968 goto errout; 2969 } 2970 i++; 2971 } 2972 } 2973 2974 nla_nest_end(skb, port_list); 2975 genlmsg_end(skb, hdr); 2976 if (incomplete) 2977 goto start_again; 2978 2979 send_done: 2980 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI); 2981 if (!nlh) { 2982 err = __send_and_alloc_skb(&skb, team, portid, send_func); 2983 if (err) 2984 return err; 2985 goto send_done; 2986 } 2987 2988 return send_func(skb, team, portid); 2989 2990 nla_put_failure: 2991 err = -EMSGSIZE; 2992 errout: 2993 nlmsg_free(skb); 2994 return err; 2995 } 2996 2997 int team_nl_port_list_get_doit(struct sk_buff *skb, 2998 struct genl_info *info) 2999 { 3000 struct team *team; 3001 int err; 3002 3003 rtnl_lock(); 3004 3005 team = team_nl_team_get(info); 3006 if (!team) { 3007 err = -EINVAL; 3008 goto rtnl_unlock; 3009 } 3010 3011 err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq, 3012 NLM_F_ACK, team_nl_send_unicast, NULL); 3013 3014 team_nl_team_put(team); 3015 3016 rtnl_unlock: 3017 rtnl_unlock(); 3018 3019 return err; 3020 } 3021 3022 static const struct genl_multicast_group team_nl_mcgrps[] = { 3023 { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, }, 3024 }; 3025 3026 static struct genl_family team_nl_family __ro_after_init = { 3027 .name = TEAM_GENL_NAME, 3028 .version = TEAM_GENL_VERSION, 3029 .maxattr = ARRAY_SIZE(team_nl_policy) - 1, 3030 .policy = team_nl_policy, 3031 .netnsok = true, 3032 .module = THIS_MODULE, 3033 .small_ops = team_nl_ops, 3034 .n_small_ops = ARRAY_SIZE(team_nl_ops), 3035 .resv_start_op = TEAM_CMD_PORT_LIST_GET + 1, 3036 .mcgrps = team_nl_mcgrps, 3037 .n_mcgrps = ARRAY_SIZE(team_nl_mcgrps), 3038 }; 3039 3040 static int team_nl_send_multicast(struct sk_buff *skb, 3041 struct team *team, u32 portid) 3042 { 3043 return genlmsg_multicast_netns(&team_nl_family, 3044 dev_net(netdev_from_priv(team)), 3045 skb, 0, 0, GFP_KERNEL); 3046 } 3047 3048 static int team_nl_send_event_options_get(struct team *team, 3049 struct list_head *sel_opt_inst_list) 3050 { 3051 return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast, 3052 sel_opt_inst_list); 3053 } 3054 3055 static int team_nl_send_event_port_get(struct team *team, 3056 struct team_port *port) 3057 { 3058 return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast, 3059 port); 3060 } 3061 3062 static int __init team_nl_init(void) 3063 { 3064 return genl_register_family(&team_nl_family); 3065 } 3066 3067 static void __exit team_nl_fini(void) 3068 { 3069 genl_unregister_family(&team_nl_family); 3070 } 3071 3072 3073 /****************** 3074 * Change checkers 3075 ******************/ 3076 3077 static void __team_options_change_check(struct team *team) 3078 { 3079 int err; 3080 struct team_option_inst *opt_inst; 3081 LIST_HEAD(sel_opt_inst_list); 3082 3083 list_for_each_entry(opt_inst, &team->option_inst_list, list) { 3084 if (opt_inst->changed) 3085 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list); 3086 } 3087 err = team_nl_send_event_options_get(team, &sel_opt_inst_list); 3088 if (err && err != -ESRCH) 3089 netdev_warn(netdev_from_priv(team), 3090 "Failed to send options change via netlink (err %d)\n", 3091 err); 3092 } 3093 3094 /* rtnl lock is held */ 3095 3096 static void __team_port_change_send(struct team_port *port, bool linkup) 3097 { 3098 int err; 3099 3100 port->changed = true; 3101 port->state.linkup = linkup; 3102 team_refresh_port_linkup(port); 3103 if (linkup) { 3104 struct ethtool_link_ksettings ecmd; 3105 3106 err = netif_get_link_ksettings(port->dev, &ecmd); 3107 if (!err) { 3108 port->state.speed = ecmd.base.speed; 3109 port->state.duplex = ecmd.base.duplex; 3110 goto send_event; 3111 } 3112 } 3113 port->state.speed = 0; 3114 port->state.duplex = 0; 3115 3116 send_event: 3117 err = team_nl_send_event_port_get(port->team, port); 3118 if (err && err != -ESRCH) 3119 netdev_warn(netdev_from_priv(port->team), 3120 "Failed to send port change of device %s via netlink (err %d)\n", 3121 port->dev->name, err); 3122 3123 } 3124 3125 static void __team_carrier_check(struct team *team) 3126 { 3127 struct team_port *port; 3128 bool team_linkup; 3129 3130 if (team->user_carrier_enabled) 3131 return; 3132 3133 team_linkup = false; 3134 list_for_each_entry(port, &team->port_list, list) { 3135 if (port->linkup) { 3136 team_linkup = true; 3137 break; 3138 } 3139 } 3140 3141 if (team_linkup) 3142 netif_carrier_on(netdev_from_priv(team)); 3143 else 3144 netif_carrier_off(netdev_from_priv(team)); 3145 } 3146 3147 static void __team_port_change_check(struct team_port *port, bool linkup) 3148 { 3149 if (port->state.linkup != linkup) 3150 __team_port_change_send(port, linkup); 3151 __team_carrier_check(port->team); 3152 } 3153 3154 static void __team_port_change_port_added(struct team_port *port, bool linkup) 3155 { 3156 __team_port_change_send(port, linkup); 3157 __team_carrier_check(port->team); 3158 } 3159 3160 static void __team_port_change_port_removed(struct team_port *port) 3161 { 3162 port->removed = true; 3163 __team_port_change_send(port, false); 3164 __team_carrier_check(port->team); 3165 } 3166 3167 static void team_port_change_check(struct team_port *port, bool linkup) 3168 { 3169 ASSERT_RTNL(); 3170 3171 __team_port_change_check(port, linkup); 3172 } 3173 3174 3175 /************************************ 3176 * Net device notifier event handler 3177 ************************************/ 3178 3179 static int team_device_event(struct notifier_block *unused, 3180 unsigned long event, void *ptr) 3181 { 3182 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 3183 struct team_port *port; 3184 3185 port = team_port_get_rtnl(dev); 3186 if (!port) 3187 return NOTIFY_DONE; 3188 3189 switch (event) { 3190 case NETDEV_UP: 3191 if (netif_oper_up(dev)) 3192 team_port_change_check(port, true); 3193 break; 3194 case NETDEV_DOWN: 3195 team_port_change_check(port, false); 3196 break; 3197 case NETDEV_CHANGE: 3198 if (netif_running(port->dev)) 3199 team_port_change_check(port, 3200 !!netif_oper_up(port->dev)); 3201 break; 3202 case NETDEV_UNREGISTER: 3203 team_del_slave_on_unregister(netdev_from_priv(port->team), 3204 dev); 3205 break; 3206 case NETDEV_FEAT_CHANGE: 3207 if (!port->team->notifier_ctx) { 3208 port->team->notifier_ctx = true; 3209 netdev_compute_master_upper_features(netdev_from_priv(port->team), 3210 true); 3211 port->team->notifier_ctx = false; 3212 } 3213 break; 3214 case NETDEV_PRECHANGEMTU: 3215 /* Forbid to change mtu of underlaying device */ 3216 if (!port->team->port_mtu_change_allowed) 3217 return NOTIFY_BAD; 3218 break; 3219 case NETDEV_PRE_TYPE_CHANGE: 3220 /* Forbid to change type of underlaying device */ 3221 return NOTIFY_BAD; 3222 case NETDEV_RESEND_IGMP: 3223 /* Propagate to master device */ 3224 call_netdevice_notifiers(event, netdev_from_priv(port->team)); 3225 break; 3226 } 3227 return NOTIFY_DONE; 3228 } 3229 3230 static struct notifier_block team_notifier_block __read_mostly = { 3231 .notifier_call = team_device_event, 3232 }; 3233 3234 3235 /*********************** 3236 * Module init and exit 3237 ***********************/ 3238 3239 static int __init team_module_init(void) 3240 { 3241 int err; 3242 3243 err = register_netdevice_notifier(&team_notifier_block); 3244 if (err) 3245 return err; 3246 3247 err = rtnl_link_register(&team_link_ops); 3248 if (err) 3249 goto err_rtnl_reg; 3250 3251 err = team_nl_init(); 3252 if (err) 3253 goto err_nl_init; 3254 3255 return 0; 3256 3257 err_nl_init: 3258 rtnl_link_unregister(&team_link_ops); 3259 3260 err_rtnl_reg: 3261 unregister_netdevice_notifier(&team_notifier_block); 3262 3263 return err; 3264 } 3265 3266 static void __exit team_module_exit(void) 3267 { 3268 team_nl_fini(); 3269 rtnl_link_unregister(&team_link_ops); 3270 unregister_netdevice_notifier(&team_notifier_block); 3271 } 3272 3273 module_init(team_module_init); 3274 module_exit(team_module_exit); 3275 3276 MODULE_LICENSE("GPL v2"); 3277 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>"); 3278 MODULE_DESCRIPTION("Ethernet team device driver"); 3279 MODULE_ALIAS_RTNL_LINK(DRV_NAME); 3280 MODULE_IMPORT_NS("NETDEV_INTERNAL"); 3281