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 { 825 struct list_head *qom_list; 826 struct team_port *port; 827 828 if (!team->queue_override_enabled || !skb->queue_mapping) 829 return false; 830 qom_list = __team_get_qom_list(team, skb->queue_mapping); 831 list_for_each_entry_rcu(port, qom_list, qom_list) { 832 if (!team_dev_queue_xmit(team, port, skb)) 833 return true; 834 } 835 return false; 836 } 837 838 static void __team_queue_override_port_del(struct team *team, 839 struct team_port *port) 840 { 841 if (!port->queue_id) 842 return; 843 list_del_rcu(&port->qom_list); 844 } 845 846 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port, 847 struct team_port *cur) 848 { 849 if (port->priority < cur->priority) 850 return true; 851 if (port->priority > cur->priority) 852 return false; 853 if (port->tx_index < cur->tx_index) 854 return true; 855 return false; 856 } 857 858 static void __team_queue_override_port_add(struct team *team, 859 struct team_port *port) 860 { 861 struct team_port *cur; 862 struct list_head *qom_list; 863 struct list_head *node; 864 865 if (!port->queue_id) 866 return; 867 qom_list = __team_get_qom_list(team, port->queue_id); 868 node = qom_list; 869 list_for_each_entry(cur, qom_list, qom_list) { 870 if (team_queue_override_port_has_gt_prio_than(port, cur)) 871 break; 872 node = &cur->qom_list; 873 } 874 list_add_tail_rcu(&port->qom_list, node); 875 } 876 877 static void __team_queue_override_enabled_check(struct team *team) 878 { 879 struct team_port *port; 880 bool enabled = false; 881 882 list_for_each_entry(port, &team->port_list, list) { 883 if (port->queue_id) { 884 enabled = true; 885 break; 886 } 887 } 888 if (enabled == team->queue_override_enabled) 889 return; 890 netdev_dbg(netdev_from_priv(team), "%s queue override\n", 891 enabled ? "Enabling" : "Disabling"); 892 team->queue_override_enabled = enabled; 893 } 894 895 static void team_queue_override_port_prio_changed(struct team *team, 896 struct team_port *port) 897 { 898 if (!port->queue_id || !team_port_tx_enabled(port)) 899 return; 900 __team_queue_override_port_del(team, port); 901 __team_queue_override_port_add(team, port); 902 __team_queue_override_enabled_check(team); 903 } 904 905 static void team_queue_override_port_change_queue_id(struct team *team, 906 struct team_port *port, 907 u16 new_queue_id) 908 { 909 if (team_port_tx_enabled(port)) { 910 __team_queue_override_port_del(team, port); 911 port->queue_id = new_queue_id; 912 __team_queue_override_port_add(team, port); 913 __team_queue_override_enabled_check(team); 914 } else { 915 port->queue_id = new_queue_id; 916 } 917 } 918 919 static void team_queue_override_port_add(struct team *team, 920 struct team_port *port) 921 { 922 __team_queue_override_port_add(team, port); 923 __team_queue_override_enabled_check(team); 924 } 925 926 static void team_queue_override_port_del(struct team *team, 927 struct team_port *port) 928 { 929 __team_queue_override_port_del(team, port); 930 __team_queue_override_enabled_check(team); 931 } 932 933 934 /**************** 935 * Port handling 936 ****************/ 937 938 static bool team_port_find(const struct team *team, 939 const struct team_port *port) 940 { 941 struct team_port *cur; 942 943 list_for_each_entry(cur, &team->port_list, list) 944 if (cur == port) 945 return true; 946 return false; 947 } 948 949 static void __team_port_enable_rx(struct team *team, 950 struct team_port *port) 951 { 952 team->rx_en_port_count++; 953 WRITE_ONCE(port->rx_enabled, true); 954 } 955 956 static void __team_port_disable_rx(struct team *team, 957 struct team_port *port) 958 { 959 team->rx_en_port_count--; 960 WRITE_ONCE(port->rx_enabled, false); 961 } 962 963 static void team_port_enable_rx(struct team *team, 964 struct team_port *port) 965 { 966 if (team_port_rx_enabled(port)) 967 return; 968 969 __team_port_enable_rx(team, port); 970 team_adjust_ops(team); 971 team_notify_peers(team); 972 team_mcast_rejoin(team); 973 } 974 975 static void team_port_disable_rx(struct team *team, 976 struct team_port *port) 977 { 978 if (!team_port_rx_enabled(port)) 979 return; 980 981 __team_port_disable_rx(team, port); 982 team_adjust_ops(team); 983 } 984 985 /* 986 * Enable just TX on the port by adding to tx-enabled port hashlist and 987 * setting port->tx_index (Might be racy so reader could see incorrect 988 * ifindex when processing a flying packet, but that is not a problem). 989 * Write guarded by RTNL. 990 */ 991 static void __team_port_enable_tx(struct team *team, 992 struct team_port *port) 993 { 994 WRITE_ONCE(port->tx_index, team->tx_en_port_count); 995 WRITE_ONCE(team->tx_en_port_count, team->tx_en_port_count + 1); 996 hlist_add_head_rcu(&port->tx_hlist, 997 team_tx_port_index_hash(team, port->tx_index)); 998 } 999 1000 static void team_port_enable_tx(struct team *team, 1001 struct team_port *port) 1002 { 1003 if (team_port_tx_enabled(port)) 1004 return; 1005 1006 __team_port_enable_tx(team, port); 1007 team_adjust_ops(team); 1008 team_queue_override_port_add(team, port); 1009 1010 /* Don't rejoin multicast, since this port might not be receiving. */ 1011 team_notify_peers(team); 1012 team_lower_state_changed(port); 1013 } 1014 1015 static void __reconstruct_port_hlist(struct team *team, int rm_index) 1016 { 1017 struct hlist_head *tx_port_index_hash; 1018 struct team_port *port; 1019 int i; 1020 1021 for (i = rm_index + 1; i < team->tx_en_port_count; i++) { 1022 port = team_get_port_by_tx_index(team, i); 1023 hlist_del_rcu(&port->tx_hlist); 1024 WRITE_ONCE(port->tx_index, port->tx_index - 1); 1025 tx_port_index_hash = team_tx_port_index_hash(team, 1026 port->tx_index); 1027 hlist_add_head_rcu(&port->tx_hlist, tx_port_index_hash); 1028 } 1029 } 1030 1031 static void __team_port_disable_tx(struct team *team, 1032 struct team_port *port) 1033 { 1034 if (team->ops.port_tx_disabled) 1035 team->ops.port_tx_disabled(team, port); 1036 1037 hlist_del_rcu(&port->tx_hlist); 1038 __reconstruct_port_hlist(team, port->tx_index); 1039 1040 WRITE_ONCE(port->tx_index, -1); 1041 WRITE_ONCE(team->tx_en_port_count, team->tx_en_port_count - 1); 1042 } 1043 1044 static void team_port_disable_tx(struct team *team, 1045 struct team_port *port) 1046 { 1047 if (!team_port_tx_enabled(port)) 1048 return; 1049 1050 __team_port_disable_tx(team, port); 1051 1052 team_queue_override_port_del(team, port); 1053 team_adjust_ops(team); 1054 team_lower_state_changed(port); 1055 } 1056 1057 /* 1058 * Enable TX AND RX on the port. 1059 */ 1060 static void team_port_enable(struct team *team, 1061 struct team_port *port) 1062 { 1063 bool rx_was_enabled; 1064 bool tx_was_enabled; 1065 1066 if (team_port_enabled(port)) 1067 return; 1068 1069 rx_was_enabled = team_port_rx_enabled(port); 1070 tx_was_enabled = team_port_tx_enabled(port); 1071 1072 if (!rx_was_enabled) 1073 __team_port_enable_rx(team, port); 1074 if (!tx_was_enabled) 1075 __team_port_enable_tx(team, port); 1076 1077 team_adjust_ops(team); 1078 if (!tx_was_enabled) 1079 team_queue_override_port_add(team, port); 1080 team_notify_peers(team); 1081 if (!rx_was_enabled) 1082 team_mcast_rejoin(team); 1083 if (!tx_was_enabled) 1084 team_lower_state_changed(port); 1085 } 1086 1087 static void team_port_disable(struct team *team, 1088 struct team_port *port) 1089 { 1090 bool rx_was_enabled = team_port_rx_enabled(port); 1091 bool tx_was_enabled = team_port_tx_enabled(port); 1092 1093 if (!tx_was_enabled && !rx_was_enabled) 1094 return; 1095 1096 if (tx_was_enabled) { 1097 __team_port_disable_tx(team, port); 1098 team_queue_override_port_del(team, port); 1099 } 1100 if (rx_was_enabled) 1101 __team_port_disable_rx(team, port); 1102 1103 team_adjust_ops(team); 1104 1105 if (tx_was_enabled) 1106 team_lower_state_changed(port); 1107 } 1108 1109 static int team_port_enter(struct team *team, struct team_port *port) 1110 { 1111 int err = 0; 1112 1113 dev_hold(netdev_from_priv(team)); 1114 if (team->ops.port_enter) { 1115 err = team->ops.port_enter(team, port); 1116 if (err) { 1117 netdev_err(netdev_from_priv(team), 1118 "Device %s failed to enter team mode\n", 1119 port->dev->name); 1120 goto err_port_enter; 1121 } 1122 } 1123 1124 return 0; 1125 1126 err_port_enter: 1127 dev_put(netdev_from_priv(team)); 1128 1129 return err; 1130 } 1131 1132 static void team_port_leave(struct team *team, struct team_port *port) 1133 { 1134 if (team->ops.port_leave) 1135 team->ops.port_leave(team, port); 1136 dev_put(netdev_from_priv(team)); 1137 } 1138 1139 #ifdef CONFIG_NET_POLL_CONTROLLER 1140 static int __team_port_enable_netpoll(struct team_port *port) 1141 { 1142 struct netpoll *np; 1143 int err; 1144 1145 np = kzalloc_obj(*np); 1146 if (!np) 1147 return -ENOMEM; 1148 1149 err = __netpoll_setup(np, port->dev); 1150 if (err) { 1151 kfree(np); 1152 return err; 1153 } 1154 port->np = np; 1155 return err; 1156 } 1157 1158 static int team_port_enable_netpoll(struct team_port *port) 1159 { 1160 if (!netdev_from_priv(port->team)->npinfo) 1161 return 0; 1162 1163 return __team_port_enable_netpoll(port); 1164 } 1165 1166 static void team_port_disable_netpoll(struct team_port *port) 1167 { 1168 struct netpoll *np = port->np; 1169 1170 if (!np) 1171 return; 1172 port->np = NULL; 1173 1174 __netpoll_free(np); 1175 } 1176 #else 1177 static int team_port_enable_netpoll(struct team_port *port) 1178 { 1179 return 0; 1180 } 1181 static void team_port_disable_netpoll(struct team_port *port) 1182 { 1183 } 1184 #endif 1185 1186 static int team_upper_dev_link(struct team *team, struct team_port *port, 1187 struct netlink_ext_ack *extack) 1188 { 1189 struct netdev_lag_upper_info lag_upper_info; 1190 int err; 1191 1192 lag_upper_info.tx_type = team->mode->lag_tx_type; 1193 lag_upper_info.hash_type = NETDEV_LAG_HASH_UNKNOWN; 1194 err = netdev_master_upper_dev_link(port->dev, netdev_from_priv(team), 1195 NULL, &lag_upper_info, extack); 1196 if (err) 1197 return err; 1198 port->dev->priv_flags |= IFF_TEAM_PORT; 1199 return 0; 1200 } 1201 1202 static void team_upper_dev_unlink(struct team *team, struct team_port *port) 1203 { 1204 netdev_upper_dev_unlink(port->dev, netdev_from_priv(team)); 1205 port->dev->priv_flags &= ~IFF_TEAM_PORT; 1206 } 1207 1208 static void __team_port_change_port_added(struct team_port *port, bool linkup); 1209 static int team_dev_type_check_change(struct net_device *dev, 1210 struct net_device *port_dev); 1211 1212 static int team_port_add(struct team *team, struct net_device *port_dev, 1213 struct netlink_ext_ack *extack) 1214 { 1215 struct net_device *dev = netdev_from_priv(team); 1216 struct team_port *port; 1217 char *portname = port_dev->name; 1218 int err; 1219 1220 if (port_dev->flags & IFF_LOOPBACK) { 1221 NL_SET_ERR_MSG(extack, "Loopback device can't be added as a team port"); 1222 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n", 1223 portname); 1224 return -EINVAL; 1225 } 1226 1227 if (netif_is_team_port(port_dev)) { 1228 NL_SET_ERR_MSG(extack, "Device is already a port of a team device"); 1229 netdev_err(dev, "Device %s is already a port " 1230 "of a team device\n", portname); 1231 return -EBUSY; 1232 } 1233 1234 if (dev == port_dev) { 1235 NL_SET_ERR_MSG(extack, "Cannot enslave team device to itself"); 1236 netdev_err(dev, "Cannot enslave team device to itself\n"); 1237 return -EINVAL; 1238 } 1239 1240 if (netdev_has_upper_dev(dev, port_dev)) { 1241 NL_SET_ERR_MSG(extack, "Device is already an upper device of the team interface"); 1242 netdev_err(dev, "Device %s is already an upper device of the team interface\n", 1243 portname); 1244 return -EBUSY; 1245 } 1246 1247 if (netdev_has_upper_dev(port_dev, dev)) { 1248 NL_SET_ERR_MSG(extack, "Device is already a lower device of the team interface"); 1249 netdev_err(dev, "Device %s is already a lower device of the team interface\n", 1250 portname); 1251 return -EBUSY; 1252 } 1253 1254 if (port_dev->features & NETIF_F_VLAN_CHALLENGED && 1255 vlan_uses_dev(dev)) { 1256 NL_SET_ERR_MSG(extack, "Device is VLAN challenged and team device has VLAN set up"); 1257 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n", 1258 portname); 1259 return -EPERM; 1260 } 1261 1262 if (port_dev->flags & IFF_UP) { 1263 NL_SET_ERR_MSG(extack, "Device is up. Set it down before adding it as a team port"); 1264 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n", 1265 portname); 1266 return -EBUSY; 1267 } 1268 1269 port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size, 1270 GFP_KERNEL); 1271 if (!port) 1272 return -ENOMEM; 1273 1274 port->dev = port_dev; 1275 port->team = team; 1276 INIT_LIST_HEAD(&port->qom_list); 1277 1278 port->orig.mtu = port_dev->mtu; 1279 /* 1280 * MTU assignment will be handled in team_dev_type_check_change 1281 * if dev and port_dev are of different types 1282 */ 1283 if (dev->type == port_dev->type) { 1284 err = dev_set_mtu(port_dev, dev->mtu); 1285 if (err) { 1286 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err); 1287 goto err_set_mtu; 1288 } 1289 } 1290 1291 memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len); 1292 1293 err = team_port_enter(team, port); 1294 if (err) { 1295 netdev_err(dev, "Device %s failed to enter team mode\n", 1296 portname); 1297 goto err_port_enter; 1298 } 1299 1300 err = dev_open(port_dev, extack); 1301 if (err) { 1302 netdev_dbg(dev, "Device %s opening failed\n", 1303 portname); 1304 goto err_dev_open; 1305 } 1306 1307 err = vlan_vids_add_by_dev(port_dev, dev); 1308 if (err) { 1309 netdev_err(dev, "Failed to add vlan ids to device %s\n", 1310 portname); 1311 goto err_vids_add; 1312 } 1313 1314 err = team_port_enable_netpoll(port); 1315 if (err) { 1316 netdev_err(dev, "Failed to enable netpoll on device %s\n", 1317 portname); 1318 goto err_enable_netpoll; 1319 } 1320 1321 if (!(dev->features & NETIF_F_LRO)) 1322 dev_disable_lro(port_dev); 1323 1324 err = netdev_rx_handler_register(port_dev, team_handle_frame, 1325 port); 1326 if (err) { 1327 netdev_err(dev, "Device %s failed to register rx_handler\n", 1328 portname); 1329 goto err_handler_register; 1330 } 1331 1332 err = team_upper_dev_link(team, port, extack); 1333 if (err) { 1334 netdev_err(dev, "Device %s failed to set upper link\n", 1335 portname); 1336 goto err_set_upper_link; 1337 } 1338 1339 err = __team_option_inst_add_port(team, port); 1340 if (err) { 1341 netdev_err(dev, "Device %s failed to add per-port options\n", 1342 portname); 1343 goto err_option_port_add; 1344 } 1345 1346 /* set promiscuity level to new slave */ 1347 if (dev->flags & IFF_PROMISC) { 1348 err = dev_set_promiscuity(port_dev, 1); 1349 if (err) 1350 goto err_set_slave_promisc; 1351 } 1352 1353 /* set allmulti level to new slave */ 1354 if (dev->flags & IFF_ALLMULTI) { 1355 err = dev_set_allmulti(port_dev, 1); 1356 if (err) { 1357 if (dev->flags & IFF_PROMISC) 1358 dev_set_promiscuity(port_dev, -1); 1359 goto err_set_slave_allmulti; 1360 } 1361 } 1362 1363 err = team_dev_type_check_change(dev, port_dev); 1364 if (err) 1365 goto err_set_dev_type; 1366 1367 if (dev->flags & IFF_UP) { 1368 netif_addr_lock_bh(dev); 1369 dev_uc_sync_multiple(port_dev, dev); 1370 dev_mc_sync_multiple(port_dev, dev); 1371 netif_addr_unlock_bh(dev); 1372 } 1373 1374 WRITE_ONCE(port->tx_index, -1); 1375 list_add_tail_rcu(&port->list, &team->port_list); 1376 team_port_enable(team, port); 1377 netdev_compute_master_upper_features(dev, true); 1378 netdev_lock_ops(port_dev); 1379 __team_port_change_port_added(port, !!netif_oper_up(port_dev)); 1380 netdev_unlock_ops(port_dev); 1381 __team_options_change_check(team); 1382 1383 netdev_info(dev, "Port device %s added\n", portname); 1384 1385 return 0; 1386 1387 err_set_dev_type: 1388 err_set_slave_allmulti: 1389 err_set_slave_promisc: 1390 __team_option_inst_del_port(team, port); 1391 1392 err_option_port_add: 1393 team_upper_dev_unlink(team, port); 1394 1395 err_set_upper_link: 1396 netdev_rx_handler_unregister(port_dev); 1397 1398 err_handler_register: 1399 team_port_disable_netpoll(port); 1400 1401 err_enable_netpoll: 1402 vlan_vids_del_by_dev(port_dev, dev); 1403 1404 err_vids_add: 1405 dev_close(port_dev); 1406 1407 err_dev_open: 1408 team_port_leave(team, port); 1409 team_port_set_orig_dev_addr(port); 1410 1411 err_port_enter: 1412 dev_set_mtu(port_dev, port->orig.mtu); 1413 1414 err_set_mtu: 1415 kfree(port); 1416 1417 return err; 1418 } 1419 1420 static void __team_port_change_port_removed(struct team_port *port); 1421 1422 static int team_port_del(struct team *team, struct net_device *port_dev, bool unregister) 1423 { 1424 struct net_device *dev = netdev_from_priv(team); 1425 struct team_port *port; 1426 char *portname = port_dev->name; 1427 1428 port = team_port_get_rtnl(port_dev); 1429 if (!port || !team_port_find(team, port)) { 1430 netdev_err(dev, "Device %s does not act as a port of this team\n", 1431 portname); 1432 return -ENOENT; 1433 } 1434 1435 team_port_disable(team, port); 1436 list_del_rcu(&port->list); 1437 1438 if (dev->flags & IFF_PROMISC) 1439 dev_set_promiscuity(port_dev, -1); 1440 if (dev->flags & IFF_ALLMULTI) 1441 dev_set_allmulti(port_dev, -1); 1442 1443 team_upper_dev_unlink(team, port); 1444 netdev_rx_handler_unregister(port_dev); 1445 team_port_disable_netpoll(port); 1446 vlan_vids_del_by_dev(port_dev, dev); 1447 if (dev->flags & IFF_UP) { 1448 dev_uc_unsync(port_dev, dev); 1449 dev_mc_unsync(port_dev, dev); 1450 } 1451 dev_close(port_dev); 1452 team_port_leave(team, port); 1453 1454 __team_option_inst_mark_removed_port(team, port); 1455 __team_options_change_check(team); 1456 __team_option_inst_del_port(team, port); 1457 __team_port_change_port_removed(port); 1458 1459 team_port_set_orig_dev_addr(port); 1460 if (unregister) { 1461 netdev_lock_ops(port_dev); 1462 __netif_set_mtu(port_dev, port->orig.mtu); 1463 netdev_unlock_ops(port_dev); 1464 } else { 1465 dev_set_mtu(port_dev, port->orig.mtu); 1466 } 1467 kfree_rcu(port, rcu); 1468 netdev_info(dev, "Port device %s removed\n", portname); 1469 netdev_compute_master_upper_features(dev, true); 1470 1471 return 0; 1472 } 1473 1474 1475 /***************** 1476 * Net device ops 1477 *****************/ 1478 1479 static void team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx) 1480 { 1481 ctx->data.str_val = team->mode->kind; 1482 } 1483 1484 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx) 1485 { 1486 return team_change_mode(team, ctx->data.str_val); 1487 } 1488 1489 static void team_notify_peers_count_get(struct team *team, 1490 struct team_gsetter_ctx *ctx) 1491 { 1492 ctx->data.u32_val = team->notify_peers.count; 1493 } 1494 1495 static int team_notify_peers_count_set(struct team *team, 1496 struct team_gsetter_ctx *ctx) 1497 { 1498 team->notify_peers.count = ctx->data.u32_val; 1499 return 0; 1500 } 1501 1502 static void team_notify_peers_interval_get(struct team *team, 1503 struct team_gsetter_ctx *ctx) 1504 { 1505 ctx->data.u32_val = team->notify_peers.interval; 1506 } 1507 1508 static int team_notify_peers_interval_set(struct team *team, 1509 struct team_gsetter_ctx *ctx) 1510 { 1511 team->notify_peers.interval = ctx->data.u32_val; 1512 return 0; 1513 } 1514 1515 static void team_mcast_rejoin_count_get(struct team *team, 1516 struct team_gsetter_ctx *ctx) 1517 { 1518 ctx->data.u32_val = team->mcast_rejoin.count; 1519 } 1520 1521 static int team_mcast_rejoin_count_set(struct team *team, 1522 struct team_gsetter_ctx *ctx) 1523 { 1524 team->mcast_rejoin.count = ctx->data.u32_val; 1525 return 0; 1526 } 1527 1528 static void team_mcast_rejoin_interval_get(struct team *team, 1529 struct team_gsetter_ctx *ctx) 1530 { 1531 ctx->data.u32_val = team->mcast_rejoin.interval; 1532 } 1533 1534 static int team_mcast_rejoin_interval_set(struct team *team, 1535 struct team_gsetter_ctx *ctx) 1536 { 1537 team->mcast_rejoin.interval = ctx->data.u32_val; 1538 return 0; 1539 } 1540 1541 static void team_port_en_option_get(struct team *team, 1542 struct team_gsetter_ctx *ctx) 1543 { 1544 struct team_port *port = ctx->info->port; 1545 1546 ctx->data.bool_val = team_port_enabled(port); 1547 } 1548 1549 static int team_port_en_option_set(struct team *team, 1550 struct team_gsetter_ctx *ctx) 1551 { 1552 struct team_port *port = ctx->info->port; 1553 1554 if (ctx->data.bool_val) 1555 team_port_enable(team, port); 1556 else 1557 team_port_disable(team, port); 1558 return 0; 1559 } 1560 1561 static void team_port_rx_en_option_get(struct team *team, 1562 struct team_gsetter_ctx *ctx) 1563 { 1564 struct team_port *port = ctx->info->port; 1565 1566 ctx->data.bool_val = team_port_rx_enabled(port); 1567 } 1568 1569 static int team_port_rx_en_option_set(struct team *team, 1570 struct team_gsetter_ctx *ctx) 1571 { 1572 struct team_port *port = ctx->info->port; 1573 1574 if (ctx->data.bool_val) 1575 team_port_enable_rx(team, port); 1576 else 1577 team_port_disable_rx(team, port); 1578 return 0; 1579 } 1580 1581 static void team_port_tx_en_option_get(struct team *team, 1582 struct team_gsetter_ctx *ctx) 1583 { 1584 struct team_port *port = ctx->info->port; 1585 1586 ctx->data.bool_val = team_port_tx_enabled(port); 1587 } 1588 1589 static int team_port_tx_en_option_set(struct team *team, 1590 struct team_gsetter_ctx *ctx) 1591 { 1592 struct team_port *port = ctx->info->port; 1593 1594 if (ctx->data.bool_val) 1595 team_port_enable_tx(team, port); 1596 else 1597 team_port_disable_tx(team, port); 1598 return 0; 1599 } 1600 1601 static void team_user_linkup_option_get(struct team *team, 1602 struct team_gsetter_ctx *ctx) 1603 { 1604 struct team_port *port = ctx->info->port; 1605 1606 ctx->data.bool_val = port->user.linkup; 1607 } 1608 1609 static void __team_carrier_check(struct team *team); 1610 1611 static int team_user_linkup_option_set(struct team *team, 1612 struct team_gsetter_ctx *ctx) 1613 { 1614 struct team_port *port = ctx->info->port; 1615 1616 port->user.linkup = ctx->data.bool_val; 1617 team_refresh_port_linkup(port); 1618 __team_carrier_check(port->team); 1619 return 0; 1620 } 1621 1622 static void team_user_linkup_en_option_get(struct team *team, 1623 struct team_gsetter_ctx *ctx) 1624 { 1625 struct team_port *port = ctx->info->port; 1626 1627 ctx->data.bool_val = port->user.linkup_enabled; 1628 } 1629 1630 static int team_user_linkup_en_option_set(struct team *team, 1631 struct team_gsetter_ctx *ctx) 1632 { 1633 struct team_port *port = ctx->info->port; 1634 1635 port->user.linkup_enabled = ctx->data.bool_val; 1636 team_refresh_port_linkup(port); 1637 __team_carrier_check(port->team); 1638 return 0; 1639 } 1640 1641 static void team_priority_option_get(struct team *team, 1642 struct team_gsetter_ctx *ctx) 1643 { 1644 struct team_port *port = ctx->info->port; 1645 1646 ctx->data.s32_val = port->priority; 1647 } 1648 1649 static int team_priority_option_set(struct team *team, 1650 struct team_gsetter_ctx *ctx) 1651 { 1652 struct team_port *port = ctx->info->port; 1653 s32 priority = ctx->data.s32_val; 1654 1655 if (port->priority == priority) 1656 return 0; 1657 port->priority = priority; 1658 team_queue_override_port_prio_changed(team, port); 1659 return 0; 1660 } 1661 1662 static void team_queue_id_option_get(struct team *team, 1663 struct team_gsetter_ctx *ctx) 1664 { 1665 struct team_port *port = ctx->info->port; 1666 1667 ctx->data.u32_val = port->queue_id; 1668 } 1669 1670 static int team_queue_id_option_set(struct team *team, 1671 struct team_gsetter_ctx *ctx) 1672 { 1673 struct team_port *port = ctx->info->port; 1674 u16 new_queue_id = ctx->data.u32_val; 1675 1676 if (port->queue_id == new_queue_id) 1677 return 0; 1678 if (new_queue_id >= netdev_from_priv(team)->real_num_tx_queues) 1679 return -EINVAL; 1680 team_queue_override_port_change_queue_id(team, port, new_queue_id); 1681 return 0; 1682 } 1683 1684 static const struct team_option team_options[] = { 1685 { 1686 .name = "mode", 1687 .type = TEAM_OPTION_TYPE_STRING, 1688 .getter = team_mode_option_get, 1689 .setter = team_mode_option_set, 1690 }, 1691 { 1692 .name = "notify_peers_count", 1693 .type = TEAM_OPTION_TYPE_U32, 1694 .getter = team_notify_peers_count_get, 1695 .setter = team_notify_peers_count_set, 1696 }, 1697 { 1698 .name = "notify_peers_interval", 1699 .type = TEAM_OPTION_TYPE_U32, 1700 .getter = team_notify_peers_interval_get, 1701 .setter = team_notify_peers_interval_set, 1702 }, 1703 { 1704 .name = "mcast_rejoin_count", 1705 .type = TEAM_OPTION_TYPE_U32, 1706 .getter = team_mcast_rejoin_count_get, 1707 .setter = team_mcast_rejoin_count_set, 1708 }, 1709 { 1710 .name = "mcast_rejoin_interval", 1711 .type = TEAM_OPTION_TYPE_U32, 1712 .getter = team_mcast_rejoin_interval_get, 1713 .setter = team_mcast_rejoin_interval_set, 1714 }, 1715 { 1716 .name = "enabled", 1717 .type = TEAM_OPTION_TYPE_BOOL, 1718 .per_port = true, 1719 .getter = team_port_en_option_get, 1720 .setter = team_port_en_option_set, 1721 }, 1722 { 1723 .name = "rx_enabled", 1724 .type = TEAM_OPTION_TYPE_BOOL, 1725 .per_port = true, 1726 .getter = team_port_rx_en_option_get, 1727 .setter = team_port_rx_en_option_set, 1728 }, 1729 { 1730 .name = "tx_enabled", 1731 .type = TEAM_OPTION_TYPE_BOOL, 1732 .per_port = true, 1733 .getter = team_port_tx_en_option_get, 1734 .setter = team_port_tx_en_option_set, 1735 }, 1736 { 1737 .name = "user_linkup", 1738 .type = TEAM_OPTION_TYPE_BOOL, 1739 .per_port = true, 1740 .getter = team_user_linkup_option_get, 1741 .setter = team_user_linkup_option_set, 1742 }, 1743 { 1744 .name = "user_linkup_enabled", 1745 .type = TEAM_OPTION_TYPE_BOOL, 1746 .per_port = true, 1747 .getter = team_user_linkup_en_option_get, 1748 .setter = team_user_linkup_en_option_set, 1749 }, 1750 { 1751 .name = "priority", 1752 .type = TEAM_OPTION_TYPE_S32, 1753 .per_port = true, 1754 .getter = team_priority_option_get, 1755 .setter = team_priority_option_set, 1756 }, 1757 { 1758 .name = "queue_id", 1759 .type = TEAM_OPTION_TYPE_U32, 1760 .per_port = true, 1761 .getter = team_queue_id_option_get, 1762 .setter = team_queue_id_option_set, 1763 }, 1764 }; 1765 1766 1767 static int team_init(struct net_device *dev) 1768 { 1769 struct team *team = netdev_priv(dev); 1770 int i; 1771 int err; 1772 1773 team_set_no_mode(team); 1774 team->notifier_ctx = false; 1775 1776 team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats); 1777 if (!team->pcpu_stats) 1778 return -ENOMEM; 1779 1780 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++) 1781 INIT_HLIST_HEAD(&team->tx_en_port_hlist[i]); 1782 INIT_LIST_HEAD(&team->port_list); 1783 err = team_queue_override_init(team); 1784 if (err) 1785 goto err_team_queue_override_init; 1786 1787 team_adjust_ops(team); 1788 1789 INIT_LIST_HEAD(&team->option_list); 1790 INIT_LIST_HEAD(&team->option_inst_list); 1791 1792 team_notify_peers_init(team); 1793 team_mcast_rejoin_init(team); 1794 1795 err = team_options_register(team, team_options, ARRAY_SIZE(team_options)); 1796 if (err) 1797 goto err_options_register; 1798 netif_carrier_off(dev); 1799 1800 netdev_lockdep_set_classes(dev); 1801 1802 return 0; 1803 1804 err_options_register: 1805 team_mcast_rejoin_fini(team); 1806 team_notify_peers_fini(team); 1807 team_queue_override_fini(team); 1808 err_team_queue_override_init: 1809 free_percpu(team->pcpu_stats); 1810 1811 return err; 1812 } 1813 1814 static void team_uninit(struct net_device *dev) 1815 { 1816 struct team *team = netdev_priv(dev); 1817 struct team_port *port; 1818 struct team_port *tmp; 1819 1820 ASSERT_RTNL(); 1821 1822 list_for_each_entry_safe(port, tmp, &team->port_list, list) 1823 team_port_del(team, port->dev, false); 1824 1825 __team_change_mode(team, NULL); /* cleanup */ 1826 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options)); 1827 team_mcast_rejoin_fini(team); 1828 team_notify_peers_fini(team); 1829 team_queue_override_fini(team); 1830 netdev_change_features(dev); 1831 } 1832 1833 static void team_destructor(struct net_device *dev) 1834 { 1835 struct team *team = netdev_priv(dev); 1836 1837 free_percpu(team->pcpu_stats); 1838 } 1839 1840 static int team_open(struct net_device *dev) 1841 { 1842 return 0; 1843 } 1844 1845 static int team_close(struct net_device *dev) 1846 { 1847 struct team *team = netdev_priv(dev); 1848 struct team_port *port; 1849 1850 list_for_each_entry(port, &team->port_list, list) { 1851 dev_uc_unsync(port->dev, dev); 1852 dev_mc_unsync(port->dev, dev); 1853 } 1854 1855 return 0; 1856 } 1857 1858 /* 1859 * note: already called with rcu_read_lock 1860 */ 1861 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev) 1862 { 1863 struct team *team = netdev_priv(dev); 1864 bool tx_success; 1865 unsigned int len = skb->len; 1866 1867 tx_success = team_queue_override_transmit(team, skb); 1868 if (!tx_success) 1869 tx_success = READ_ONCE(team->ops.transmit)(team, skb); 1870 if (tx_success) { 1871 struct team_pcpu_stats *pcpu_stats; 1872 1873 pcpu_stats = this_cpu_ptr(team->pcpu_stats); 1874 u64_stats_update_begin(&pcpu_stats->syncp); 1875 u64_stats_inc(&pcpu_stats->tx_packets); 1876 u64_stats_add(&pcpu_stats->tx_bytes, len); 1877 u64_stats_update_end(&pcpu_stats->syncp); 1878 } else { 1879 this_cpu_inc(team->pcpu_stats->tx_dropped); 1880 } 1881 1882 return NETDEV_TX_OK; 1883 } 1884 1885 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb, 1886 struct net_device *sb_dev) 1887 { 1888 /* 1889 * This helper function exists to help dev_pick_tx get the correct 1890 * destination queue. Using a helper function skips a call to 1891 * skb_tx_hash and will put the skbs in the queue we expect on their 1892 * way down to the team driver. 1893 */ 1894 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0; 1895 1896 /* 1897 * Save the original txq to restore before passing to the driver 1898 */ 1899 qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping; 1900 1901 if (unlikely(txq >= dev->real_num_tx_queues)) { 1902 do { 1903 txq -= dev->real_num_tx_queues; 1904 } while (txq >= dev->real_num_tx_queues); 1905 } 1906 return txq; 1907 } 1908 1909 static void team_change_rx_flags(struct net_device *dev, int change) 1910 { 1911 struct team *team = netdev_priv(dev); 1912 struct team_port *port; 1913 int inc; 1914 1915 ASSERT_RTNL(); 1916 1917 list_for_each_entry(port, &team->port_list, list) { 1918 if (change & IFF_PROMISC) { 1919 inc = dev->flags & IFF_PROMISC ? 1 : -1; 1920 dev_set_promiscuity(port->dev, inc); 1921 } 1922 if (change & IFF_ALLMULTI) { 1923 inc = dev->flags & IFF_ALLMULTI ? 1 : -1; 1924 dev_set_allmulti(port->dev, inc); 1925 } 1926 } 1927 } 1928 1929 static void team_set_rx_mode(struct net_device *dev) 1930 { 1931 struct team *team = netdev_priv(dev); 1932 struct team_port *port; 1933 1934 rcu_read_lock(); 1935 list_for_each_entry_rcu(port, &team->port_list, list) { 1936 dev_uc_sync_multiple(port->dev, dev); 1937 dev_mc_sync_multiple(port->dev, dev); 1938 } 1939 rcu_read_unlock(); 1940 } 1941 1942 static int team_set_mac_address(struct net_device *dev, void *p) 1943 { 1944 struct sockaddr *addr = p; 1945 struct team *team = netdev_priv(dev); 1946 struct team_port *port; 1947 1948 ASSERT_RTNL(); 1949 1950 if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data)) 1951 return -EADDRNOTAVAIL; 1952 dev_addr_set(dev, addr->sa_data); 1953 list_for_each_entry(port, &team->port_list, list) 1954 if (team->ops.port_change_dev_addr) 1955 team->ops.port_change_dev_addr(team, port); 1956 return 0; 1957 } 1958 1959 static int team_change_mtu(struct net_device *dev, int new_mtu) 1960 { 1961 struct team *team = netdev_priv(dev); 1962 struct team_port *port; 1963 int err; 1964 1965 ASSERT_RTNL(); 1966 1967 team->port_mtu_change_allowed = true; 1968 list_for_each_entry(port, &team->port_list, list) { 1969 err = dev_set_mtu(port->dev, new_mtu); 1970 if (err) { 1971 netdev_err(dev, "Device %s failed to change mtu", 1972 port->dev->name); 1973 goto unwind; 1974 } 1975 } 1976 team->port_mtu_change_allowed = false; 1977 1978 WRITE_ONCE(dev->mtu, new_mtu); 1979 1980 return 0; 1981 1982 unwind: 1983 list_for_each_entry_continue_reverse(port, &team->port_list, list) 1984 dev_set_mtu(port->dev, dev->mtu); 1985 team->port_mtu_change_allowed = false; 1986 1987 return err; 1988 } 1989 1990 static void 1991 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 1992 { 1993 struct team *team = netdev_priv(dev); 1994 struct team_pcpu_stats *p; 1995 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes; 1996 u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0; 1997 unsigned int start; 1998 int i; 1999 2000 for_each_possible_cpu(i) { 2001 p = per_cpu_ptr(team->pcpu_stats, i); 2002 do { 2003 start = u64_stats_fetch_begin(&p->syncp); 2004 rx_packets = u64_stats_read(&p->rx_packets); 2005 rx_bytes = u64_stats_read(&p->rx_bytes); 2006 rx_multicast = u64_stats_read(&p->rx_multicast); 2007 tx_packets = u64_stats_read(&p->tx_packets); 2008 tx_bytes = u64_stats_read(&p->tx_bytes); 2009 } while (u64_stats_fetch_retry(&p->syncp, start)); 2010 2011 stats->rx_packets += rx_packets; 2012 stats->rx_bytes += rx_bytes; 2013 stats->multicast += rx_multicast; 2014 stats->tx_packets += tx_packets; 2015 stats->tx_bytes += tx_bytes; 2016 /* 2017 * rx_dropped, tx_dropped & rx_nohandler are u32, 2018 * updated without syncp protection. 2019 */ 2020 rx_dropped += READ_ONCE(p->rx_dropped); 2021 tx_dropped += READ_ONCE(p->tx_dropped); 2022 rx_nohandler += READ_ONCE(p->rx_nohandler); 2023 } 2024 stats->rx_dropped = rx_dropped; 2025 stats->tx_dropped = tx_dropped; 2026 stats->rx_nohandler = rx_nohandler; 2027 } 2028 2029 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) 2030 { 2031 struct team *team = netdev_priv(dev); 2032 struct team_port *port; 2033 int err; 2034 2035 ASSERT_RTNL(); 2036 2037 list_for_each_entry(port, &team->port_list, list) { 2038 err = vlan_vid_add(port->dev, proto, vid); 2039 if (err) 2040 goto unwind; 2041 } 2042 2043 return 0; 2044 2045 unwind: 2046 list_for_each_entry_continue_reverse(port, &team->port_list, list) 2047 vlan_vid_del(port->dev, proto, vid); 2048 2049 return err; 2050 } 2051 2052 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid) 2053 { 2054 struct team *team = netdev_priv(dev); 2055 struct team_port *port; 2056 2057 ASSERT_RTNL(); 2058 2059 list_for_each_entry(port, &team->port_list, list) 2060 vlan_vid_del(port->dev, proto, vid); 2061 2062 return 0; 2063 } 2064 2065 #ifdef CONFIG_NET_POLL_CONTROLLER 2066 static void team_poll_controller(struct net_device *dev) 2067 { 2068 } 2069 2070 static void __team_netpoll_cleanup(struct team *team) 2071 { 2072 struct team_port *port; 2073 2074 list_for_each_entry(port, &team->port_list, list) 2075 team_port_disable_netpoll(port); 2076 } 2077 2078 static void team_netpoll_cleanup(struct net_device *dev) 2079 { 2080 struct team *team = netdev_priv(dev); 2081 2082 ASSERT_RTNL(); 2083 2084 __team_netpoll_cleanup(team); 2085 } 2086 2087 static int team_netpoll_setup(struct net_device *dev) 2088 { 2089 struct team *team = netdev_priv(dev); 2090 struct team_port *port; 2091 int err = 0; 2092 2093 ASSERT_RTNL(); 2094 2095 list_for_each_entry(port, &team->port_list, list) { 2096 err = __team_port_enable_netpoll(port); 2097 if (err) { 2098 __team_netpoll_cleanup(team); 2099 break; 2100 } 2101 } 2102 return err; 2103 } 2104 #endif 2105 2106 static int team_add_slave(struct net_device *dev, struct net_device *port_dev, 2107 struct netlink_ext_ack *extack) 2108 { 2109 struct team *team = netdev_priv(dev); 2110 2111 ASSERT_RTNL(); 2112 2113 return team_port_add(team, port_dev, extack); 2114 } 2115 2116 static int team_del_slave(struct net_device *dev, struct net_device *port_dev) 2117 { 2118 struct team *team = netdev_priv(dev); 2119 2120 ASSERT_RTNL(); 2121 2122 return team_port_del(team, port_dev, false); 2123 } 2124 2125 static int team_del_slave_on_unregister(struct net_device *dev, struct net_device *port_dev) 2126 { 2127 struct team *team = netdev_priv(dev); 2128 2129 ASSERT_RTNL(); 2130 2131 return team_port_del(team, port_dev, true); 2132 } 2133 2134 static netdev_features_t team_fix_features(struct net_device *dev, 2135 netdev_features_t features) 2136 { 2137 struct team_port *port; 2138 struct team *team = netdev_priv(dev); 2139 netdev_features_t mask; 2140 2141 mask = features; 2142 features = netdev_base_features(features); 2143 2144 rcu_read_lock(); 2145 list_for_each_entry_rcu(port, &team->port_list, list) { 2146 features = netdev_increment_features(features, 2147 port->dev->features, 2148 mask); 2149 } 2150 rcu_read_unlock(); 2151 2152 features = netdev_add_tso_features(features, mask); 2153 2154 return features; 2155 } 2156 2157 static int team_change_carrier(struct net_device *dev, bool new_carrier) 2158 { 2159 struct team *team = netdev_priv(dev); 2160 2161 team->user_carrier_enabled = true; 2162 2163 if (new_carrier) 2164 netif_carrier_on(dev); 2165 else 2166 netif_carrier_off(dev); 2167 return 0; 2168 } 2169 2170 static const struct net_device_ops team_netdev_ops = { 2171 .ndo_init = team_init, 2172 .ndo_uninit = team_uninit, 2173 .ndo_open = team_open, 2174 .ndo_stop = team_close, 2175 .ndo_start_xmit = team_xmit, 2176 .ndo_select_queue = team_select_queue, 2177 .ndo_change_rx_flags = team_change_rx_flags, 2178 .ndo_set_rx_mode = team_set_rx_mode, 2179 .ndo_set_mac_address = team_set_mac_address, 2180 .ndo_change_mtu = team_change_mtu, 2181 .ndo_get_stats64 = team_get_stats64, 2182 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid, 2183 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid, 2184 #ifdef CONFIG_NET_POLL_CONTROLLER 2185 .ndo_poll_controller = team_poll_controller, 2186 .ndo_netpoll_setup = team_netpoll_setup, 2187 .ndo_netpoll_cleanup = team_netpoll_cleanup, 2188 #endif 2189 .ndo_add_slave = team_add_slave, 2190 .ndo_del_slave = team_del_slave, 2191 .ndo_fix_features = team_fix_features, 2192 .ndo_change_carrier = team_change_carrier, 2193 .ndo_features_check = passthru_features_check, 2194 }; 2195 2196 /*********************** 2197 * ethtool interface 2198 ***********************/ 2199 2200 static void team_ethtool_get_drvinfo(struct net_device *dev, 2201 struct ethtool_drvinfo *drvinfo) 2202 { 2203 strscpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver)); 2204 } 2205 2206 static int team_ethtool_get_link_ksettings(struct net_device *dev, 2207 struct ethtool_link_ksettings *cmd) 2208 { 2209 struct team *team= netdev_priv(dev); 2210 unsigned long speed = 0; 2211 struct team_port *port; 2212 2213 cmd->base.duplex = DUPLEX_UNKNOWN; 2214 cmd->base.port = PORT_OTHER; 2215 2216 rcu_read_lock(); 2217 list_for_each_entry_rcu(port, &team->port_list, list) { 2218 if (team_port_txable(port)) { 2219 if (port->state.speed != SPEED_UNKNOWN) 2220 speed += port->state.speed; 2221 if (cmd->base.duplex == DUPLEX_UNKNOWN && 2222 port->state.duplex != DUPLEX_UNKNOWN) 2223 cmd->base.duplex = port->state.duplex; 2224 } 2225 } 2226 rcu_read_unlock(); 2227 2228 cmd->base.speed = speed ? : SPEED_UNKNOWN; 2229 2230 return 0; 2231 } 2232 2233 static const struct ethtool_ops team_ethtool_ops = { 2234 .get_drvinfo = team_ethtool_get_drvinfo, 2235 .get_link = ethtool_op_get_link, 2236 .get_link_ksettings = team_ethtool_get_link_ksettings, 2237 }; 2238 2239 /*********************** 2240 * rt netlink interface 2241 ***********************/ 2242 2243 /* For tx path we need a linkup && enabled port and for parse any port 2244 * suffices. 2245 */ 2246 static struct team_port *team_header_port_get_rcu(struct team *team, 2247 bool txable) 2248 { 2249 struct team_port *port; 2250 2251 list_for_each_entry_rcu(port, &team->port_list, list) { 2252 if (!txable || team_port_txable(port)) 2253 return port; 2254 } 2255 2256 return NULL; 2257 } 2258 2259 static int team_header_create(struct sk_buff *skb, struct net_device *team_dev, 2260 unsigned short type, const void *daddr, 2261 const void *saddr, unsigned int len) 2262 { 2263 struct team *team = netdev_priv(team_dev); 2264 const struct header_ops *port_ops; 2265 struct team_port *port; 2266 int ret = 0; 2267 2268 rcu_read_lock(); 2269 port = team_header_port_get_rcu(team, true); 2270 if (port) { 2271 port_ops = READ_ONCE(port->dev->header_ops); 2272 if (port_ops && port_ops->create) 2273 ret = port_ops->create(skb, port->dev, 2274 type, daddr, saddr, len); 2275 } 2276 rcu_read_unlock(); 2277 return ret; 2278 } 2279 2280 static int team_header_parse(const struct sk_buff *skb, 2281 const struct net_device *team_dev, 2282 unsigned char *haddr) 2283 { 2284 struct team *team = netdev_priv(team_dev); 2285 const struct header_ops *port_ops; 2286 struct team_port *port; 2287 int ret = 0; 2288 2289 rcu_read_lock(); 2290 port = team_header_port_get_rcu(team, false); 2291 if (port) { 2292 port_ops = READ_ONCE(port->dev->header_ops); 2293 if (port_ops && port_ops->parse) 2294 ret = port_ops->parse(skb, port->dev, haddr); 2295 } 2296 rcu_read_unlock(); 2297 return ret; 2298 } 2299 2300 static const struct header_ops team_header_ops = { 2301 .create = team_header_create, 2302 .parse = team_header_parse, 2303 }; 2304 2305 static void team_setup_by_port(struct net_device *dev, 2306 struct net_device *port_dev) 2307 { 2308 struct team *team = netdev_priv(dev); 2309 2310 if (port_dev->type == ARPHRD_ETHER) 2311 dev->header_ops = team->header_ops_cache; 2312 else 2313 dev->header_ops = port_dev->header_ops ? 2314 &team_header_ops : NULL; 2315 dev->type = port_dev->type; 2316 dev->hard_header_len = port_dev->hard_header_len; 2317 dev->needed_headroom = port_dev->needed_headroom; 2318 dev->addr_len = port_dev->addr_len; 2319 dev->mtu = port_dev->mtu; 2320 memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len); 2321 eth_hw_addr_inherit(dev, port_dev); 2322 2323 if (port_dev->flags & IFF_POINTOPOINT) { 2324 dev->flags &= ~(IFF_BROADCAST | IFF_MULTICAST); 2325 dev->flags |= (IFF_POINTOPOINT | IFF_NOARP); 2326 } else if ((port_dev->flags & (IFF_BROADCAST | IFF_MULTICAST)) == 2327 (IFF_BROADCAST | IFF_MULTICAST)) { 2328 dev->flags |= (IFF_BROADCAST | IFF_MULTICAST); 2329 dev->flags &= ~(IFF_POINTOPOINT | IFF_NOARP); 2330 } 2331 } 2332 2333 static int team_dev_type_check_change(struct net_device *dev, 2334 struct net_device *port_dev) 2335 { 2336 struct team *team = netdev_priv(dev); 2337 char *portname = port_dev->name; 2338 int err; 2339 2340 if (dev->type == port_dev->type) 2341 return 0; 2342 if (!list_empty(&team->port_list)) { 2343 netdev_err(dev, "Device %s is of different type\n", portname); 2344 return -EBUSY; 2345 } 2346 err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev); 2347 err = notifier_to_errno(err); 2348 if (err) { 2349 netdev_err(dev, "Refused to change device type\n"); 2350 return err; 2351 } 2352 dev_uc_flush(dev); 2353 dev_mc_flush(dev); 2354 team_setup_by_port(dev, port_dev); 2355 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev); 2356 return 0; 2357 } 2358 2359 static void team_setup(struct net_device *dev) 2360 { 2361 struct team *team = netdev_priv(dev); 2362 2363 ether_setup(dev); 2364 dev->max_mtu = ETH_MAX_MTU; 2365 team->header_ops_cache = dev->header_ops; 2366 2367 dev->netdev_ops = &team_netdev_ops; 2368 dev->ethtool_ops = &team_ethtool_ops; 2369 dev->needs_free_netdev = true; 2370 dev->priv_destructor = team_destructor; 2371 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); 2372 dev->priv_flags |= IFF_NO_QUEUE; 2373 dev->priv_flags |= IFF_TEAM; 2374 2375 /* 2376 * Indicate we support unicast address filtering. That way core won't 2377 * bring us to promisc mode in case a unicast addr is added. 2378 * Let this up to underlay drivers. 2379 */ 2380 dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE; 2381 dev->lltx = true; 2382 2383 /* Don't allow team devices to change network namespaces. */ 2384 dev->netns_immutable = true; 2385 2386 dev->features |= NETIF_F_GRO; 2387 2388 dev->hw_features = MASTER_UPPER_DEV_VLAN_FEATURES | 2389 NETIF_F_HW_VLAN_CTAG_RX | 2390 NETIF_F_HW_VLAN_CTAG_FILTER | 2391 NETIF_F_HW_VLAN_STAG_RX | 2392 NETIF_F_HW_VLAN_STAG_FILTER; 2393 2394 dev->hw_features |= NETIF_F_GSO_ENCAP_ALL; 2395 dev->features |= dev->hw_features; 2396 dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; 2397 } 2398 2399 static int team_newlink(struct net_device *dev, 2400 struct rtnl_newlink_params *params, 2401 struct netlink_ext_ack *extack) 2402 { 2403 struct nlattr **tb = params->tb; 2404 2405 if (tb[IFLA_ADDRESS] == NULL) 2406 eth_hw_addr_random(dev); 2407 2408 return register_netdevice(dev); 2409 } 2410 2411 static int team_validate(struct nlattr *tb[], struct nlattr *data[], 2412 struct netlink_ext_ack *extack) 2413 { 2414 if (tb[IFLA_ADDRESS]) { 2415 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) 2416 return -EINVAL; 2417 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) 2418 return -EADDRNOTAVAIL; 2419 } 2420 return 0; 2421 } 2422 2423 static unsigned int team_get_num_tx_queues(void) 2424 { 2425 return TEAM_DEFAULT_NUM_TX_QUEUES; 2426 } 2427 2428 static unsigned int team_get_num_rx_queues(void) 2429 { 2430 return TEAM_DEFAULT_NUM_RX_QUEUES; 2431 } 2432 2433 static struct rtnl_link_ops team_link_ops __read_mostly = { 2434 .kind = DRV_NAME, 2435 .priv_size = sizeof(struct team), 2436 .setup = team_setup, 2437 .newlink = team_newlink, 2438 .validate = team_validate, 2439 .get_num_tx_queues = team_get_num_tx_queues, 2440 .get_num_rx_queues = team_get_num_rx_queues, 2441 }; 2442 2443 2444 /*********************************** 2445 * Generic netlink custom interface 2446 ***********************************/ 2447 2448 static struct genl_family team_nl_family; 2449 2450 int team_nl_noop_doit(struct sk_buff *skb, struct genl_info *info) 2451 { 2452 struct sk_buff *msg; 2453 void *hdr; 2454 int err; 2455 2456 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 2457 if (!msg) 2458 return -ENOMEM; 2459 2460 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq, 2461 &team_nl_family, 0, TEAM_CMD_NOOP); 2462 if (!hdr) { 2463 err = -EMSGSIZE; 2464 goto err_msg_put; 2465 } 2466 2467 genlmsg_end(msg, hdr); 2468 2469 return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid); 2470 2471 err_msg_put: 2472 nlmsg_free(msg); 2473 2474 return err; 2475 } 2476 2477 /* 2478 * Netlink cmd functions should be locked by following two functions. 2479 * Since dev gets held here, that ensures dev won't disappear in between. 2480 */ 2481 static struct team *team_nl_team_get(struct genl_info *info) 2482 { 2483 struct net *net = genl_info_net(info); 2484 struct net_device *dev; 2485 int ifindex; 2486 2487 ASSERT_RTNL(); 2488 2489 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX]) 2490 return NULL; 2491 2492 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]); 2493 dev = dev_get_by_index(net, ifindex); 2494 if (!dev || dev->netdev_ops != &team_netdev_ops) { 2495 dev_put(dev); 2496 return NULL; 2497 } 2498 2499 return netdev_priv(dev); 2500 } 2501 2502 static void team_nl_team_put(struct team *team) 2503 { 2504 dev_put(netdev_from_priv(team)); 2505 } 2506 2507 typedef int team_nl_send_func_t(struct sk_buff *skb, 2508 struct team *team, u32 portid); 2509 2510 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid) 2511 { 2512 return genlmsg_unicast(dev_net(netdev_from_priv(team)), skb, portid); 2513 } 2514 2515 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team, 2516 struct team_option_inst *opt_inst) 2517 { 2518 struct nlattr *option_item; 2519 struct team_option *option = opt_inst->option; 2520 struct team_option_inst_info *opt_inst_info = &opt_inst->info; 2521 struct team_gsetter_ctx ctx; 2522 int err; 2523 2524 ctx.info = opt_inst_info; 2525 err = team_option_get(team, opt_inst, &ctx); 2526 if (err) 2527 return err; 2528 2529 option_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_OPTION); 2530 if (!option_item) 2531 return -EMSGSIZE; 2532 2533 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name)) 2534 goto nest_cancel; 2535 if (opt_inst_info->port && 2536 nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX, 2537 opt_inst_info->port->dev->ifindex)) 2538 goto nest_cancel; 2539 if (opt_inst->option->array_size && 2540 nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX, 2541 opt_inst_info->array_index)) 2542 goto nest_cancel; 2543 2544 switch (option->type) { 2545 case TEAM_OPTION_TYPE_U32: 2546 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32)) 2547 goto nest_cancel; 2548 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val)) 2549 goto nest_cancel; 2550 break; 2551 case TEAM_OPTION_TYPE_STRING: 2552 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING)) 2553 goto nest_cancel; 2554 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA, 2555 ctx.data.str_val)) 2556 goto nest_cancel; 2557 break; 2558 case TEAM_OPTION_TYPE_BINARY: 2559 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY)) 2560 goto nest_cancel; 2561 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len, 2562 ctx.data.bin_val.ptr)) 2563 goto nest_cancel; 2564 break; 2565 case TEAM_OPTION_TYPE_BOOL: 2566 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG)) 2567 goto nest_cancel; 2568 if (ctx.data.bool_val && 2569 nla_put_flag(skb, TEAM_ATTR_OPTION_DATA)) 2570 goto nest_cancel; 2571 break; 2572 case TEAM_OPTION_TYPE_S32: 2573 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32)) 2574 goto nest_cancel; 2575 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val)) 2576 goto nest_cancel; 2577 break; 2578 default: 2579 BUG(); 2580 } 2581 if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED)) 2582 goto nest_cancel; 2583 if (opt_inst->changed) { 2584 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED)) 2585 goto nest_cancel; 2586 opt_inst->changed = false; 2587 } 2588 nla_nest_end(skb, option_item); 2589 return 0; 2590 2591 nest_cancel: 2592 nla_nest_cancel(skb, option_item); 2593 return -EMSGSIZE; 2594 } 2595 2596 static int __send_and_alloc_skb(struct sk_buff **pskb, 2597 struct team *team, u32 portid, 2598 team_nl_send_func_t *send_func) 2599 { 2600 int err; 2601 2602 if (*pskb) { 2603 err = send_func(*pskb, team, portid); 2604 if (err) 2605 return err; 2606 } 2607 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL); 2608 if (!*pskb) 2609 return -ENOMEM; 2610 return 0; 2611 } 2612 2613 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq, 2614 int flags, team_nl_send_func_t *send_func, 2615 struct list_head *sel_opt_inst_list) 2616 { 2617 struct nlattr *option_list; 2618 struct nlmsghdr *nlh; 2619 void *hdr; 2620 struct team_option_inst *opt_inst; 2621 int err; 2622 struct sk_buff *skb = NULL; 2623 bool incomplete; 2624 int i; 2625 2626 opt_inst = list_first_entry(sel_opt_inst_list, 2627 struct team_option_inst, tmp_list); 2628 2629 start_again: 2630 err = __send_and_alloc_skb(&skb, team, portid, send_func); 2631 if (err) 2632 return err; 2633 2634 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI, 2635 TEAM_CMD_OPTIONS_GET); 2636 if (!hdr) { 2637 nlmsg_free(skb); 2638 return -EMSGSIZE; 2639 } 2640 2641 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, 2642 netdev_from_priv(team)->ifindex)) 2643 goto nla_put_failure; 2644 option_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_OPTION); 2645 if (!option_list) 2646 goto nla_put_failure; 2647 2648 i = 0; 2649 incomplete = false; 2650 list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) { 2651 err = team_nl_fill_one_option_get(skb, team, opt_inst); 2652 if (err) { 2653 if (err == -EMSGSIZE) { 2654 if (!i) 2655 goto errout; 2656 incomplete = true; 2657 break; 2658 } 2659 goto errout; 2660 } 2661 i++; 2662 } 2663 2664 nla_nest_end(skb, option_list); 2665 genlmsg_end(skb, hdr); 2666 if (incomplete) 2667 goto start_again; 2668 2669 send_done: 2670 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI); 2671 if (!nlh) { 2672 err = __send_and_alloc_skb(&skb, team, portid, send_func); 2673 if (err) 2674 return err; 2675 goto send_done; 2676 } 2677 2678 return send_func(skb, team, portid); 2679 2680 nla_put_failure: 2681 err = -EMSGSIZE; 2682 errout: 2683 nlmsg_free(skb); 2684 return err; 2685 } 2686 2687 int team_nl_options_get_doit(struct sk_buff *skb, struct genl_info *info) 2688 { 2689 struct team *team; 2690 struct team_option_inst *opt_inst; 2691 int err; 2692 LIST_HEAD(sel_opt_inst_list); 2693 2694 rtnl_lock(); 2695 2696 team = team_nl_team_get(info); 2697 if (!team) { 2698 err = -EINVAL; 2699 goto rtnl_unlock; 2700 } 2701 2702 list_for_each_entry(opt_inst, &team->option_inst_list, list) 2703 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list); 2704 err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq, 2705 NLM_F_ACK, team_nl_send_unicast, 2706 &sel_opt_inst_list); 2707 2708 team_nl_team_put(team); 2709 2710 rtnl_unlock: 2711 rtnl_unlock(); 2712 2713 return err; 2714 } 2715 2716 static int team_nl_send_event_options_get(struct team *team, 2717 struct list_head *sel_opt_inst_list); 2718 2719 int team_nl_options_set_doit(struct sk_buff *skb, struct genl_info *info) 2720 { 2721 struct team *team; 2722 int err = 0; 2723 int i; 2724 struct nlattr *nl_option; 2725 2726 rtnl_lock(); 2727 2728 team = team_nl_team_get(info); 2729 if (!team) { 2730 err = -EINVAL; 2731 goto rtnl_unlock; 2732 } 2733 2734 err = -EINVAL; 2735 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) { 2736 err = -EINVAL; 2737 goto team_put; 2738 } 2739 2740 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) { 2741 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1]; 2742 struct nlattr *attr; 2743 struct nlattr *attr_data; 2744 LIST_HEAD(opt_inst_list); 2745 enum team_option_type opt_type; 2746 int opt_port_ifindex = 0; /* != 0 for per-port options */ 2747 u32 opt_array_index = 0; 2748 bool opt_is_array = false; 2749 struct team_option_inst *opt_inst; 2750 char *opt_name; 2751 bool opt_found = false; 2752 2753 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) { 2754 err = -EINVAL; 2755 goto team_put; 2756 } 2757 err = nla_parse_nested_deprecated(opt_attrs, 2758 TEAM_ATTR_OPTION_MAX, 2759 nl_option, 2760 team_attr_option_nl_policy, 2761 info->extack); 2762 if (err) 2763 goto team_put; 2764 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] || 2765 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) { 2766 err = -EINVAL; 2767 goto team_put; 2768 } 2769 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) { 2770 case NLA_U32: 2771 opt_type = TEAM_OPTION_TYPE_U32; 2772 break; 2773 case NLA_STRING: 2774 opt_type = TEAM_OPTION_TYPE_STRING; 2775 break; 2776 case NLA_BINARY: 2777 opt_type = TEAM_OPTION_TYPE_BINARY; 2778 break; 2779 case NLA_FLAG: 2780 opt_type = TEAM_OPTION_TYPE_BOOL; 2781 break; 2782 case NLA_S32: 2783 opt_type = TEAM_OPTION_TYPE_S32; 2784 break; 2785 default: 2786 goto team_put; 2787 } 2788 2789 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA]; 2790 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) { 2791 err = -EINVAL; 2792 goto team_put; 2793 } 2794 2795 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]); 2796 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX]; 2797 if (attr) 2798 opt_port_ifindex = nla_get_u32(attr); 2799 2800 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX]; 2801 if (attr) { 2802 opt_is_array = true; 2803 opt_array_index = nla_get_u32(attr); 2804 } 2805 2806 list_for_each_entry(opt_inst, &team->option_inst_list, list) { 2807 struct team_option *option = opt_inst->option; 2808 struct team_gsetter_ctx ctx; 2809 struct team_option_inst_info *opt_inst_info; 2810 int tmp_ifindex; 2811 2812 opt_inst_info = &opt_inst->info; 2813 tmp_ifindex = opt_inst_info->port ? 2814 opt_inst_info->port->dev->ifindex : 0; 2815 if (option->type != opt_type || 2816 strcmp(option->name, opt_name) || 2817 tmp_ifindex != opt_port_ifindex || 2818 (option->array_size && !opt_is_array) || 2819 opt_inst_info->array_index != opt_array_index) 2820 continue; 2821 opt_found = true; 2822 ctx.info = opt_inst_info; 2823 switch (opt_type) { 2824 case TEAM_OPTION_TYPE_U32: 2825 ctx.data.u32_val = nla_get_u32(attr_data); 2826 break; 2827 case TEAM_OPTION_TYPE_STRING: 2828 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN || 2829 !memchr(nla_data(attr_data), '\0', 2830 nla_len(attr_data))) { 2831 err = -EINVAL; 2832 goto team_put; 2833 } 2834 ctx.data.str_val = nla_data(attr_data); 2835 break; 2836 case TEAM_OPTION_TYPE_BINARY: 2837 ctx.data.bin_val.len = nla_len(attr_data); 2838 ctx.data.bin_val.ptr = nla_data(attr_data); 2839 break; 2840 case TEAM_OPTION_TYPE_BOOL: 2841 ctx.data.bool_val = attr_data ? true : false; 2842 break; 2843 case TEAM_OPTION_TYPE_S32: 2844 ctx.data.s32_val = nla_get_s32(attr_data); 2845 break; 2846 default: 2847 BUG(); 2848 } 2849 err = team_option_set(team, opt_inst, &ctx); 2850 if (err) 2851 goto team_put; 2852 opt_inst->changed = true; 2853 list_add(&opt_inst->tmp_list, &opt_inst_list); 2854 } 2855 if (!opt_found) { 2856 err = -ENOENT; 2857 goto team_put; 2858 } 2859 2860 err = team_nl_send_event_options_get(team, &opt_inst_list); 2861 if (err) 2862 break; 2863 } 2864 2865 team_put: 2866 team_nl_team_put(team); 2867 rtnl_unlock: 2868 rtnl_unlock(); 2869 return err; 2870 } 2871 2872 static int team_nl_fill_one_port_get(struct sk_buff *skb, 2873 struct team_port *port) 2874 { 2875 struct nlattr *port_item; 2876 2877 port_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_PORT); 2878 if (!port_item) 2879 goto nest_cancel; 2880 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex)) 2881 goto nest_cancel; 2882 if (port->changed) { 2883 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED)) 2884 goto nest_cancel; 2885 port->changed = false; 2886 } 2887 if ((port->removed && 2888 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) || 2889 (port->state.linkup && 2890 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) || 2891 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) || 2892 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex)) 2893 goto nest_cancel; 2894 nla_nest_end(skb, port_item); 2895 return 0; 2896 2897 nest_cancel: 2898 nla_nest_cancel(skb, port_item); 2899 return -EMSGSIZE; 2900 } 2901 2902 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq, 2903 int flags, team_nl_send_func_t *send_func, 2904 struct team_port *one_port) 2905 { 2906 struct nlattr *port_list; 2907 struct nlmsghdr *nlh; 2908 void *hdr; 2909 struct team_port *port; 2910 int err; 2911 struct sk_buff *skb = NULL; 2912 bool incomplete; 2913 int i; 2914 2915 port = list_first_entry_or_null(&team->port_list, 2916 struct team_port, list); 2917 2918 start_again: 2919 err = __send_and_alloc_skb(&skb, team, portid, send_func); 2920 if (err) 2921 return err; 2922 2923 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI, 2924 TEAM_CMD_PORT_LIST_GET); 2925 if (!hdr) { 2926 nlmsg_free(skb); 2927 return -EMSGSIZE; 2928 } 2929 2930 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, 2931 netdev_from_priv(team)->ifindex)) 2932 goto nla_put_failure; 2933 port_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_PORT); 2934 if (!port_list) 2935 goto nla_put_failure; 2936 2937 i = 0; 2938 incomplete = false; 2939 2940 /* If one port is selected, called wants to send port list containing 2941 * only this port. Otherwise go through all listed ports and send all 2942 */ 2943 if (one_port) { 2944 err = team_nl_fill_one_port_get(skb, one_port); 2945 if (err) 2946 goto errout; 2947 } else if (port) { 2948 list_for_each_entry_from(port, &team->port_list, list) { 2949 err = team_nl_fill_one_port_get(skb, port); 2950 if (err) { 2951 if (err == -EMSGSIZE) { 2952 if (!i) 2953 goto errout; 2954 incomplete = true; 2955 break; 2956 } 2957 goto errout; 2958 } 2959 i++; 2960 } 2961 } 2962 2963 nla_nest_end(skb, port_list); 2964 genlmsg_end(skb, hdr); 2965 if (incomplete) 2966 goto start_again; 2967 2968 send_done: 2969 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI); 2970 if (!nlh) { 2971 err = __send_and_alloc_skb(&skb, team, portid, send_func); 2972 if (err) 2973 return err; 2974 goto send_done; 2975 } 2976 2977 return send_func(skb, team, portid); 2978 2979 nla_put_failure: 2980 err = -EMSGSIZE; 2981 errout: 2982 nlmsg_free(skb); 2983 return err; 2984 } 2985 2986 int team_nl_port_list_get_doit(struct sk_buff *skb, 2987 struct genl_info *info) 2988 { 2989 struct team *team; 2990 int err; 2991 2992 rtnl_lock(); 2993 2994 team = team_nl_team_get(info); 2995 if (!team) { 2996 err = -EINVAL; 2997 goto rtnl_unlock; 2998 } 2999 3000 err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq, 3001 NLM_F_ACK, team_nl_send_unicast, NULL); 3002 3003 team_nl_team_put(team); 3004 3005 rtnl_unlock: 3006 rtnl_unlock(); 3007 3008 return err; 3009 } 3010 3011 static const struct genl_multicast_group team_nl_mcgrps[] = { 3012 { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, }, 3013 }; 3014 3015 static struct genl_family team_nl_family __ro_after_init = { 3016 .name = TEAM_GENL_NAME, 3017 .version = TEAM_GENL_VERSION, 3018 .maxattr = ARRAY_SIZE(team_nl_policy) - 1, 3019 .policy = team_nl_policy, 3020 .netnsok = true, 3021 .module = THIS_MODULE, 3022 .small_ops = team_nl_ops, 3023 .n_small_ops = ARRAY_SIZE(team_nl_ops), 3024 .resv_start_op = TEAM_CMD_PORT_LIST_GET + 1, 3025 .mcgrps = team_nl_mcgrps, 3026 .n_mcgrps = ARRAY_SIZE(team_nl_mcgrps), 3027 }; 3028 3029 static int team_nl_send_multicast(struct sk_buff *skb, 3030 struct team *team, u32 portid) 3031 { 3032 return genlmsg_multicast_netns(&team_nl_family, 3033 dev_net(netdev_from_priv(team)), 3034 skb, 0, 0, GFP_KERNEL); 3035 } 3036 3037 static int team_nl_send_event_options_get(struct team *team, 3038 struct list_head *sel_opt_inst_list) 3039 { 3040 return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast, 3041 sel_opt_inst_list); 3042 } 3043 3044 static int team_nl_send_event_port_get(struct team *team, 3045 struct team_port *port) 3046 { 3047 return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast, 3048 port); 3049 } 3050 3051 static int __init team_nl_init(void) 3052 { 3053 return genl_register_family(&team_nl_family); 3054 } 3055 3056 static void __exit team_nl_fini(void) 3057 { 3058 genl_unregister_family(&team_nl_family); 3059 } 3060 3061 3062 /****************** 3063 * Change checkers 3064 ******************/ 3065 3066 static void __team_options_change_check(struct team *team) 3067 { 3068 int err; 3069 struct team_option_inst *opt_inst; 3070 LIST_HEAD(sel_opt_inst_list); 3071 3072 list_for_each_entry(opt_inst, &team->option_inst_list, list) { 3073 if (opt_inst->changed) 3074 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list); 3075 } 3076 err = team_nl_send_event_options_get(team, &sel_opt_inst_list); 3077 if (err && err != -ESRCH) 3078 netdev_warn(netdev_from_priv(team), 3079 "Failed to send options change via netlink (err %d)\n", 3080 err); 3081 } 3082 3083 /* rtnl lock is held */ 3084 3085 static void __team_port_change_send(struct team_port *port, bool linkup) 3086 { 3087 int err; 3088 3089 port->changed = true; 3090 port->state.linkup = linkup; 3091 team_refresh_port_linkup(port); 3092 if (linkup) { 3093 struct ethtool_link_ksettings ecmd; 3094 3095 err = netif_get_link_ksettings(port->dev, &ecmd); 3096 if (!err) { 3097 port->state.speed = ecmd.base.speed; 3098 port->state.duplex = ecmd.base.duplex; 3099 goto send_event; 3100 } 3101 } 3102 port->state.speed = 0; 3103 port->state.duplex = 0; 3104 3105 send_event: 3106 err = team_nl_send_event_port_get(port->team, port); 3107 if (err && err != -ESRCH) 3108 netdev_warn(netdev_from_priv(port->team), 3109 "Failed to send port change of device %s via netlink (err %d)\n", 3110 port->dev->name, err); 3111 3112 } 3113 3114 static void __team_carrier_check(struct team *team) 3115 { 3116 struct team_port *port; 3117 bool team_linkup; 3118 3119 if (team->user_carrier_enabled) 3120 return; 3121 3122 team_linkup = false; 3123 list_for_each_entry(port, &team->port_list, list) { 3124 if (port->linkup) { 3125 team_linkup = true; 3126 break; 3127 } 3128 } 3129 3130 if (team_linkup) 3131 netif_carrier_on(netdev_from_priv(team)); 3132 else 3133 netif_carrier_off(netdev_from_priv(team)); 3134 } 3135 3136 static void __team_port_change_check(struct team_port *port, bool linkup) 3137 { 3138 if (port->state.linkup != linkup) 3139 __team_port_change_send(port, linkup); 3140 __team_carrier_check(port->team); 3141 } 3142 3143 static void __team_port_change_port_added(struct team_port *port, bool linkup) 3144 { 3145 __team_port_change_send(port, linkup); 3146 __team_carrier_check(port->team); 3147 } 3148 3149 static void __team_port_change_port_removed(struct team_port *port) 3150 { 3151 port->removed = true; 3152 __team_port_change_send(port, false); 3153 __team_carrier_check(port->team); 3154 } 3155 3156 static void team_port_change_check(struct team_port *port, bool linkup) 3157 { 3158 ASSERT_RTNL(); 3159 3160 __team_port_change_check(port, linkup); 3161 } 3162 3163 3164 /************************************ 3165 * Net device notifier event handler 3166 ************************************/ 3167 3168 static int team_device_event(struct notifier_block *unused, 3169 unsigned long event, void *ptr) 3170 { 3171 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 3172 struct team_port *port; 3173 3174 port = team_port_get_rtnl(dev); 3175 if (!port) 3176 return NOTIFY_DONE; 3177 3178 switch (event) { 3179 case NETDEV_UP: 3180 if (netif_oper_up(dev)) 3181 team_port_change_check(port, true); 3182 break; 3183 case NETDEV_DOWN: 3184 team_port_change_check(port, false); 3185 break; 3186 case NETDEV_CHANGE: 3187 if (netif_running(port->dev)) 3188 team_port_change_check(port, 3189 !!netif_oper_up(port->dev)); 3190 break; 3191 case NETDEV_UNREGISTER: 3192 team_del_slave_on_unregister(netdev_from_priv(port->team), 3193 dev); 3194 break; 3195 case NETDEV_FEAT_CHANGE: 3196 if (!port->team->notifier_ctx) { 3197 port->team->notifier_ctx = true; 3198 netdev_compute_master_upper_features(netdev_from_priv(port->team), 3199 true); 3200 port->team->notifier_ctx = false; 3201 } 3202 break; 3203 case NETDEV_PRECHANGEMTU: 3204 /* Forbid to change mtu of underlaying device */ 3205 if (!port->team->port_mtu_change_allowed) 3206 return NOTIFY_BAD; 3207 break; 3208 case NETDEV_PRE_TYPE_CHANGE: 3209 /* Forbid to change type of underlaying device */ 3210 return NOTIFY_BAD; 3211 case NETDEV_RESEND_IGMP: 3212 /* Propagate to master device */ 3213 call_netdevice_notifiers(event, netdev_from_priv(port->team)); 3214 break; 3215 } 3216 return NOTIFY_DONE; 3217 } 3218 3219 static struct notifier_block team_notifier_block __read_mostly = { 3220 .notifier_call = team_device_event, 3221 }; 3222 3223 3224 /*********************** 3225 * Module init and exit 3226 ***********************/ 3227 3228 static int __init team_module_init(void) 3229 { 3230 int err; 3231 3232 register_netdevice_notifier(&team_notifier_block); 3233 3234 err = rtnl_link_register(&team_link_ops); 3235 if (err) 3236 goto err_rtnl_reg; 3237 3238 err = team_nl_init(); 3239 if (err) 3240 goto err_nl_init; 3241 3242 return 0; 3243 3244 err_nl_init: 3245 rtnl_link_unregister(&team_link_ops); 3246 3247 err_rtnl_reg: 3248 unregister_netdevice_notifier(&team_notifier_block); 3249 3250 return err; 3251 } 3252 3253 static void __exit team_module_exit(void) 3254 { 3255 team_nl_fini(); 3256 rtnl_link_unregister(&team_link_ops); 3257 unregister_netdevice_notifier(&team_notifier_block); 3258 } 3259 3260 module_init(team_module_init); 3261 module_exit(team_module_exit); 3262 3263 MODULE_LICENSE("GPL v2"); 3264 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>"); 3265 MODULE_DESCRIPTION("Ethernet team device driver"); 3266 MODULE_ALIAS_RTNL_LINK(DRV_NAME); 3267 MODULE_IMPORT_NS("NETDEV_INTERNAL"); 3268