1/* 2 * drivers/net/team/team.c - Network team device driver 3 * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 */ 10 11#include <linux/kernel.h> 12#include <linux/types.h> 13#include <linux/module.h> 14#include <linux/init.h> 15#include <linux/slab.h> 16#include <linux/rcupdate.h> 17#include <linux/errno.h> 18#include <linux/ctype.h> 19#include <linux/notifier.h> 20#include <linux/netdevice.h> 21#include <linux/netpoll.h> 22#include <linux/if_vlan.h> 23#include <linux/if_arp.h> 24#include <linux/socket.h> 25#include <linux/etherdevice.h> 26#include <linux/rtnetlink.h> 27#include <net/rtnetlink.h> 28#include <net/genetlink.h> 29#include <net/netlink.h> 30#include <net/sch_generic.h> 31#include <net/switchdev.h> 32#include <generated/utsrelease.h> 33#include <linux/if_team.h> 34 35#define DRV_NAME "team" 36 37 38/********** 39 * Helpers 40 **********/ 41 42#define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT) 43 44static struct team_port *team_port_get_rcu(const struct net_device *dev) 45{ 46 return rcu_dereference(dev->rx_handler_data); 47} 48 49static struct team_port *team_port_get_rtnl(const struct net_device *dev) 50{ 51 struct team_port *port = rtnl_dereference(dev->rx_handler_data); 52 53 return team_port_exists(dev) ? port : NULL; 54} 55 56/* 57 * Since the ability to change device address for open port device is tested in 58 * team_port_add, this function can be called without control of return value 59 */ 60static int __set_port_dev_addr(struct net_device *port_dev, 61 const unsigned char *dev_addr) 62{ 63 struct sockaddr addr; 64 65 memcpy(addr.sa_data, dev_addr, port_dev->addr_len); 66 addr.sa_family = port_dev->type; 67 return dev_set_mac_address(port_dev, &addr); 68} 69 70static int team_port_set_orig_dev_addr(struct team_port *port) 71{ 72 return __set_port_dev_addr(port->dev, port->orig.dev_addr); 73} 74 75static int team_port_set_team_dev_addr(struct team *team, 76 struct team_port *port) 77{ 78 return __set_port_dev_addr(port->dev, team->dev->dev_addr); 79} 80 81int team_modeop_port_enter(struct team *team, struct team_port *port) 82{ 83 return team_port_set_team_dev_addr(team, port); 84} 85EXPORT_SYMBOL(team_modeop_port_enter); 86 87void team_modeop_port_change_dev_addr(struct team *team, 88 struct team_port *port) 89{ 90 team_port_set_team_dev_addr(team, port); 91} 92EXPORT_SYMBOL(team_modeop_port_change_dev_addr); 93 94static void team_refresh_port_linkup(struct team_port *port) 95{ 96 port->linkup = port->user.linkup_enabled ? port->user.linkup : 97 port->state.linkup; 98} 99 100 101/******************* 102 * Options handling 103 *******************/ 104 105struct team_option_inst { /* One for each option instance */ 106 struct list_head list; 107 struct list_head tmp_list; 108 struct team_option *option; 109 struct team_option_inst_info info; 110 bool changed; 111 bool removed; 112}; 113 114static struct team_option *__team_find_option(struct team *team, 115 const char *opt_name) 116{ 117 struct team_option *option; 118 119 list_for_each_entry(option, &team->option_list, list) { 120 if (strcmp(option->name, opt_name) == 0) 121 return option; 122 } 123 return NULL; 124} 125 126static void __team_option_inst_del(struct team_option_inst *opt_inst) 127{ 128 list_del(&opt_inst->list); 129 kfree(opt_inst); 130} 131 132static void __team_option_inst_del_option(struct team *team, 133 struct team_option *option) 134{ 135 struct team_option_inst *opt_inst, *tmp; 136 137 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) { 138 if (opt_inst->option == option) 139 __team_option_inst_del(opt_inst); 140 } 141} 142 143static int __team_option_inst_add(struct team *team, struct team_option *option, 144 struct team_port *port) 145{ 146 struct team_option_inst *opt_inst; 147 unsigned int array_size; 148 unsigned int i; 149 int err; 150 151 array_size = option->array_size; 152 if (!array_size) 153 array_size = 1; /* No array but still need one instance */ 154 155 for (i = 0; i < array_size; i++) { 156 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL); 157 if (!opt_inst) 158 return -ENOMEM; 159 opt_inst->option = option; 160 opt_inst->info.port = port; 161 opt_inst->info.array_index = i; 162 opt_inst->changed = true; 163 opt_inst->removed = false; 164 list_add_tail(&opt_inst->list, &team->option_inst_list); 165 if (option->init) { 166 err = option->init(team, &opt_inst->info); 167 if (err) 168 return err; 169 } 170 171 } 172 return 0; 173} 174 175static int __team_option_inst_add_option(struct team *team, 176 struct team_option *option) 177{ 178 int err; 179 180 if (!option->per_port) { 181 err = __team_option_inst_add(team, option, NULL); 182 if (err) 183 goto inst_del_option; 184 } 185 return 0; 186 187inst_del_option: 188 __team_option_inst_del_option(team, option); 189 return err; 190} 191 192static void __team_option_inst_mark_removed_option(struct team *team, 193 struct team_option *option) 194{ 195 struct team_option_inst *opt_inst; 196 197 list_for_each_entry(opt_inst, &team->option_inst_list, list) { 198 if (opt_inst->option == option) { 199 opt_inst->changed = true; 200 opt_inst->removed = true; 201 } 202 } 203} 204 205static void __team_option_inst_del_port(struct team *team, 206 struct team_port *port) 207{ 208 struct team_option_inst *opt_inst, *tmp; 209 210 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) { 211 if (opt_inst->option->per_port && 212 opt_inst->info.port == port) 213 __team_option_inst_del(opt_inst); 214 } 215} 216 217static int __team_option_inst_add_port(struct team *team, 218 struct team_port *port) 219{ 220 struct team_option *option; 221 int err; 222 223 list_for_each_entry(option, &team->option_list, list) { 224 if (!option->per_port) 225 continue; 226 err = __team_option_inst_add(team, option, port); 227 if (err) 228 goto inst_del_port; 229 } 230 return 0; 231 232inst_del_port: 233 __team_option_inst_del_port(team, port); 234 return err; 235} 236 237static void __team_option_inst_mark_removed_port(struct team *team, 238 struct team_port *port) 239{ 240 struct team_option_inst *opt_inst; 241 242 list_for_each_entry(opt_inst, &team->option_inst_list, list) { 243 if (opt_inst->info.port == port) { 244 opt_inst->changed = true; 245 opt_inst->removed = true; 246 } 247 } 248} 249 250static int __team_options_register(struct team *team, 251 const struct team_option *option, 252 size_t option_count) 253{ 254 int i; 255 struct team_option **dst_opts; 256 int err; 257 258 dst_opts = kzalloc(sizeof(struct team_option *) * option_count, 259 GFP_KERNEL); 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 284inst_rollback: 285 for (i--; i >= 0; i--) 286 __team_option_inst_del_option(team, dst_opts[i]); 287 288 i = option_count - 1; 289alloc_rollback: 290 for (i--; i >= 0; i--) 291 kfree(dst_opts[i]); 292 293 kfree(dst_opts); 294 return err; 295} 296 297static void __team_options_mark_removed(struct team *team, 298 const struct team_option *option, 299 size_t option_count) 300{ 301 int i; 302 303 for (i = 0; i < option_count; i++, option++) { 304 struct team_option *del_opt; 305 306 del_opt = __team_find_option(team, option->name); 307 if (del_opt) 308 __team_option_inst_mark_removed_option(team, del_opt); 309 } 310} 311 312static void __team_options_unregister(struct team *team, 313 const struct team_option *option, 314 size_t option_count) 315{ 316 int i; 317 318 for (i = 0; i < option_count; i++, option++) { 319 struct team_option *del_opt; 320 321 del_opt = __team_find_option(team, option->name); 322 if (del_opt) { 323 __team_option_inst_del_option(team, del_opt); 324 list_del(&del_opt->list); 325 kfree(del_opt); 326 } 327 } 328} 329 330static void __team_options_change_check(struct team *team); 331 332int team_options_register(struct team *team, 333 const struct team_option *option, 334 size_t option_count) 335{ 336 int err; 337 338 err = __team_options_register(team, option, option_count); 339 if (err) 340 return err; 341 __team_options_change_check(team); 342 return 0; 343} 344EXPORT_SYMBOL(team_options_register); 345 346void team_options_unregister(struct team *team, 347 const struct team_option *option, 348 size_t option_count) 349{ 350 __team_options_mark_removed(team, option, option_count); 351 __team_options_change_check(team); 352 __team_options_unregister(team, option, option_count); 353} 354EXPORT_SYMBOL(team_options_unregister); 355 356static int team_option_get(struct team *team, 357 struct team_option_inst *opt_inst, 358 struct team_gsetter_ctx *ctx) 359{ 360 if (!opt_inst->option->getter) 361 return -EOPNOTSUPP; 362 return opt_inst->option->getter(team, ctx); 363} 364 365static int team_option_set(struct team *team, 366 struct team_option_inst *opt_inst, 367 struct team_gsetter_ctx *ctx) 368{ 369 if (!opt_inst->option->setter) 370 return -EOPNOTSUPP; 371 return opt_inst->option->setter(team, ctx); 372} 373 374void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info) 375{ 376 struct team_option_inst *opt_inst; 377 378 opt_inst = container_of(opt_inst_info, struct team_option_inst, info); 379 opt_inst->changed = true; 380} 381EXPORT_SYMBOL(team_option_inst_set_change); 382 383void team_options_change_check(struct team *team) 384{ 385 __team_options_change_check(team); 386} 387EXPORT_SYMBOL(team_options_change_check); 388 389 390/**************** 391 * Mode handling 392 ****************/ 393 394static LIST_HEAD(mode_list); 395static DEFINE_SPINLOCK(mode_list_lock); 396 397struct team_mode_item { 398 struct list_head list; 399 const struct team_mode *mode; 400}; 401 402static struct team_mode_item *__find_mode(const char *kind) 403{ 404 struct team_mode_item *mitem; 405 406 list_for_each_entry(mitem, &mode_list, list) { 407 if (strcmp(mitem->mode->kind, kind) == 0) 408 return mitem; 409 } 410 return NULL; 411} 412 413static bool is_good_mode_name(const char *name) 414{ 415 while (*name != '\0') { 416 if (!isalpha(*name) && !isdigit(*name) && *name != '_') 417 return false; 418 name++; 419 } 420 return true; 421} 422 423int team_mode_register(const struct team_mode *mode) 424{ 425 int err = 0; 426 struct team_mode_item *mitem; 427 428 if (!is_good_mode_name(mode->kind) || 429 mode->priv_size > TEAM_MODE_PRIV_SIZE) 430 return -EINVAL; 431 432 mitem = kmalloc(sizeof(*mitem), GFP_KERNEL); 433 if (!mitem) 434 return -ENOMEM; 435 436 spin_lock(&mode_list_lock); 437 if (__find_mode(mode->kind)) { 438 err = -EEXIST; 439 kfree(mitem); 440 goto unlock; 441 } 442 mitem->mode = mode; 443 list_add_tail(&mitem->list, &mode_list); 444unlock: 445 spin_unlock(&mode_list_lock); 446 return err; 447} 448EXPORT_SYMBOL(team_mode_register); 449 450void team_mode_unregister(const struct team_mode *mode) 451{ 452 struct team_mode_item *mitem; 453 454 spin_lock(&mode_list_lock); 455 mitem = __find_mode(mode->kind); 456 if (mitem) { 457 list_del_init(&mitem->list); 458 kfree(mitem); 459 } 460 spin_unlock(&mode_list_lock); 461} 462EXPORT_SYMBOL(team_mode_unregister); 463 464static const struct team_mode *team_mode_get(const char *kind) 465{ 466 struct team_mode_item *mitem; 467 const struct team_mode *mode = NULL; 468 469 spin_lock(&mode_list_lock); 470 mitem = __find_mode(kind); 471 if (!mitem) { 472 spin_unlock(&mode_list_lock); 473 request_module("team-mode-%s", kind); 474 spin_lock(&mode_list_lock); 475 mitem = __find_mode(kind); 476 } 477 if (mitem) { 478 mode = mitem->mode; 479 if (!try_module_get(mode->owner)) 480 mode = NULL; 481 } 482 483 spin_unlock(&mode_list_lock); 484 return mode; 485} 486 487static void team_mode_put(const struct team_mode *mode) 488{ 489 module_put(mode->owner); 490} 491 492static bool team_dummy_transmit(struct team *team, struct sk_buff *skb) 493{ 494 dev_kfree_skb_any(skb); 495 return false; 496} 497 498static rx_handler_result_t team_dummy_receive(struct team *team, 499 struct team_port *port, 500 struct sk_buff *skb) 501{ 502 return RX_HANDLER_ANOTHER; 503} 504 505static const struct team_mode __team_no_mode = { 506 .kind = "*NOMODE*", 507}; 508 509static bool team_is_mode_set(struct team *team) 510{ 511 return team->mode != &__team_no_mode; 512} 513 514static void team_set_no_mode(struct team *team) 515{ 516 team->user_carrier_enabled = false; 517 team->mode = &__team_no_mode; 518} 519 520static void team_adjust_ops(struct team *team) 521{ 522 /* 523 * To avoid checks in rx/tx skb paths, ensure here that non-null and 524 * correct ops are always set. 525 */ 526 527 if (!team->en_port_count || !team_is_mode_set(team) || 528 !team->mode->ops->transmit) 529 team->ops.transmit = team_dummy_transmit; 530 else 531 team->ops.transmit = team->mode->ops->transmit; 532 533 if (!team->en_port_count || !team_is_mode_set(team) || 534 !team->mode->ops->receive) 535 team->ops.receive = team_dummy_receive; 536 else 537 team->ops.receive = team->mode->ops->receive; 538} 539 540/* 541 * We can benefit from the fact that it's ensured no port is present 542 * at the time of mode change. Therefore no packets are in fly so there's no 543 * need to set mode operations in any special way. 544 */ 545static int __team_change_mode(struct team *team, 546 const struct team_mode *new_mode) 547{ 548 /* Check if mode was previously set and do cleanup if so */ 549 if (team_is_mode_set(team)) { 550 void (*exit_op)(struct team *team) = team->ops.exit; 551 552 /* Clear ops area so no callback is called any longer */ 553 memset(&team->ops, 0, sizeof(struct team_mode_ops)); 554 team_adjust_ops(team); 555 556 if (exit_op) 557 exit_op(team); 558 team_mode_put(team->mode); 559 team_set_no_mode(team); 560 /* zero private data area */ 561 memset(&team->mode_priv, 0, 562 sizeof(struct team) - offsetof(struct team, mode_priv)); 563 } 564 565 if (!new_mode) 566 return 0; 567 568 if (new_mode->ops->init) { 569 int err; 570 571 err = new_mode->ops->init(team); 572 if (err) 573 return err; 574 } 575 576 team->mode = new_mode; 577 memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops)); 578 team_adjust_ops(team); 579 580 return 0; 581} 582 583static int team_change_mode(struct team *team, const char *kind) 584{ 585 const struct team_mode *new_mode; 586 struct net_device *dev = team->dev; 587 int err; 588 589 if (!list_empty(&team->port_list)) { 590 netdev_err(dev, "No ports can be present during mode change\n"); 591 return -EBUSY; 592 } 593 594 if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) { 595 netdev_err(dev, "Unable to change to the same mode the team is in\n"); 596 return -EINVAL; 597 } 598 599 new_mode = team_mode_get(kind); 600 if (!new_mode) { 601 netdev_err(dev, "Mode \"%s\" not found\n", kind); 602 return -EINVAL; 603 } 604 605 err = __team_change_mode(team, new_mode); 606 if (err) { 607 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind); 608 team_mode_put(new_mode); 609 return err; 610 } 611 612 netdev_info(dev, "Mode changed to \"%s\"\n", kind); 613 return 0; 614} 615 616 617/********************* 618 * Peers notification 619 *********************/ 620 621static void team_notify_peers_work(struct work_struct *work) 622{ 623 struct team *team; 624 int val; 625 626 team = container_of(work, struct team, notify_peers.dw.work); 627 628 if (!rtnl_trylock()) { 629 schedule_delayed_work(&team->notify_peers.dw, 0); 630 return; 631 } 632 val = atomic_dec_if_positive(&team->notify_peers.count_pending); 633 if (val < 0) { 634 rtnl_unlock(); 635 return; 636 } 637 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev); 638 rtnl_unlock(); 639 if (val) 640 schedule_delayed_work(&team->notify_peers.dw, 641 msecs_to_jiffies(team->notify_peers.interval)); 642} 643 644static void team_notify_peers(struct team *team) 645{ 646 if (!team->notify_peers.count || !netif_running(team->dev)) 647 return; 648 atomic_add(team->notify_peers.count, &team->notify_peers.count_pending); 649 schedule_delayed_work(&team->notify_peers.dw, 0); 650} 651 652static void team_notify_peers_init(struct team *team) 653{ 654 INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work); 655} 656 657static void team_notify_peers_fini(struct team *team) 658{ 659 cancel_delayed_work_sync(&team->notify_peers.dw); 660} 661 662 663/******************************* 664 * Send multicast group rejoins 665 *******************************/ 666 667static void team_mcast_rejoin_work(struct work_struct *work) 668{ 669 struct team *team; 670 int val; 671 672 team = container_of(work, struct team, mcast_rejoin.dw.work); 673 674 if (!rtnl_trylock()) { 675 schedule_delayed_work(&team->mcast_rejoin.dw, 0); 676 return; 677 } 678 val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending); 679 if (val < 0) { 680 rtnl_unlock(); 681 return; 682 } 683 call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev); 684 rtnl_unlock(); 685 if (val) 686 schedule_delayed_work(&team->mcast_rejoin.dw, 687 msecs_to_jiffies(team->mcast_rejoin.interval)); 688} 689 690static void team_mcast_rejoin(struct team *team) 691{ 692 if (!team->mcast_rejoin.count || !netif_running(team->dev)) 693 return; 694 atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending); 695 schedule_delayed_work(&team->mcast_rejoin.dw, 0); 696} 697 698static void team_mcast_rejoin_init(struct team *team) 699{ 700 INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work); 701} 702 703static void team_mcast_rejoin_fini(struct team *team) 704{ 705 cancel_delayed_work_sync(&team->mcast_rejoin.dw); 706} 707 708 709/************************ 710 * Rx path frame handler 711 ************************/ 712 713/* note: already called with rcu_read_lock */ 714static rx_handler_result_t team_handle_frame(struct sk_buff **pskb) 715{ 716 struct sk_buff *skb = *pskb; 717 struct team_port *port; 718 struct team *team; 719 rx_handler_result_t res; 720 721 skb = skb_share_check(skb, GFP_ATOMIC); 722 if (!skb) 723 return RX_HANDLER_CONSUMED; 724 725 *pskb = skb; 726 727 port = team_port_get_rcu(skb->dev); 728 team = port->team; 729 if (!team_port_enabled(port)) { 730 /* allow exact match delivery for disabled ports */ 731 res = RX_HANDLER_EXACT; 732 } else { 733 res = team->ops.receive(team, port, skb); 734 } 735 if (res == RX_HANDLER_ANOTHER) { 736 struct team_pcpu_stats *pcpu_stats; 737 738 pcpu_stats = this_cpu_ptr(team->pcpu_stats); 739 u64_stats_update_begin(&pcpu_stats->syncp); 740 pcpu_stats->rx_packets++; 741 pcpu_stats->rx_bytes += skb->len; 742 if (skb->pkt_type == PACKET_MULTICAST) 743 pcpu_stats->rx_multicast++; 744 u64_stats_update_end(&pcpu_stats->syncp); 745 746 skb->dev = team->dev; 747 } else { 748 this_cpu_inc(team->pcpu_stats->rx_dropped); 749 } 750 751 return res; 752} 753 754 755/************************************* 756 * Multiqueue Tx port select override 757 *************************************/ 758 759static int team_queue_override_init(struct team *team) 760{ 761 struct list_head *listarr; 762 unsigned int queue_cnt = team->dev->num_tx_queues - 1; 763 unsigned int i; 764 765 if (!queue_cnt) 766 return 0; 767 listarr = kmalloc(sizeof(struct list_head) * queue_cnt, GFP_KERNEL); 768 if (!listarr) 769 return -ENOMEM; 770 team->qom_lists = listarr; 771 for (i = 0; i < queue_cnt; i++) 772 INIT_LIST_HEAD(listarr++); 773 return 0; 774} 775 776static void team_queue_override_fini(struct team *team) 777{ 778 kfree(team->qom_lists); 779} 780 781static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id) 782{ 783 return &team->qom_lists[queue_id - 1]; 784} 785 786/* 787 * note: already called with rcu_read_lock 788 */ 789static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb) 790{ 791 struct list_head *qom_list; 792 struct team_port *port; 793 794 if (!team->queue_override_enabled || !skb->queue_mapping) 795 return false; 796 qom_list = __team_get_qom_list(team, skb->queue_mapping); 797 list_for_each_entry_rcu(port, qom_list, qom_list) { 798 if (!team_dev_queue_xmit(team, port, skb)) 799 return true; 800 } 801 return false; 802} 803 804static void __team_queue_override_port_del(struct team *team, 805 struct team_port *port) 806{ 807 if (!port->queue_id) 808 return; 809 list_del_rcu(&port->qom_list); 810} 811 812static bool team_queue_override_port_has_gt_prio_than(struct team_port *port, 813 struct team_port *cur) 814{ 815 if (port->priority < cur->priority) 816 return true; 817 if (port->priority > cur->priority) 818 return false; 819 if (port->index < cur->index) 820 return true; 821 return false; 822} 823 824static void __team_queue_override_port_add(struct team *team, 825 struct team_port *port) 826{ 827 struct team_port *cur; 828 struct list_head *qom_list; 829 struct list_head *node; 830 831 if (!port->queue_id) 832 return; 833 qom_list = __team_get_qom_list(team, port->queue_id); 834 node = qom_list; 835 list_for_each_entry(cur, qom_list, qom_list) { 836 if (team_queue_override_port_has_gt_prio_than(port, cur)) 837 break; 838 node = &cur->qom_list; 839 } 840 list_add_tail_rcu(&port->qom_list, node); 841} 842 843static void __team_queue_override_enabled_check(struct team *team) 844{ 845 struct team_port *port; 846 bool enabled = false; 847 848 list_for_each_entry(port, &team->port_list, list) { 849 if (port->queue_id) { 850 enabled = true; 851 break; 852 } 853 } 854 if (enabled == team->queue_override_enabled) 855 return; 856 netdev_dbg(team->dev, "%s queue override\n", 857 enabled ? "Enabling" : "Disabling"); 858 team->queue_override_enabled = enabled; 859} 860 861static void team_queue_override_port_prio_changed(struct team *team, 862 struct team_port *port) 863{ 864 if (!port->queue_id || team_port_enabled(port)) 865 return; 866 __team_queue_override_port_del(team, port); 867 __team_queue_override_port_add(team, port); 868 __team_queue_override_enabled_check(team); 869} 870 871static void team_queue_override_port_change_queue_id(struct team *team, 872 struct team_port *port, 873 u16 new_queue_id) 874{ 875 if (team_port_enabled(port)) { 876 __team_queue_override_port_del(team, port); 877 port->queue_id = new_queue_id; 878 __team_queue_override_port_add(team, port); 879 __team_queue_override_enabled_check(team); 880 } else { 881 port->queue_id = new_queue_id; 882 } 883} 884 885static void team_queue_override_port_add(struct team *team, 886 struct team_port *port) 887{ 888 __team_queue_override_port_add(team, port); 889 __team_queue_override_enabled_check(team); 890} 891 892static void team_queue_override_port_del(struct team *team, 893 struct team_port *port) 894{ 895 __team_queue_override_port_del(team, port); 896 __team_queue_override_enabled_check(team); 897} 898 899 900/**************** 901 * Port handling 902 ****************/ 903 904static bool team_port_find(const struct team *team, 905 const struct team_port *port) 906{ 907 struct team_port *cur; 908 909 list_for_each_entry(cur, &team->port_list, list) 910 if (cur == port) 911 return true; 912 return false; 913} 914 915/* 916 * Enable/disable port by adding to enabled port hashlist and setting 917 * port->index (Might be racy so reader could see incorrect ifindex when 918 * processing a flying packet, but that is not a problem). Write guarded 919 * by team->lock. 920 */ 921static void team_port_enable(struct team *team, 922 struct team_port *port) 923{ 924 if (team_port_enabled(port)) 925 return; 926 port->index = team->en_port_count++; 927 hlist_add_head_rcu(&port->hlist, 928 team_port_index_hash(team, port->index)); 929 team_adjust_ops(team); 930 team_queue_override_port_add(team, port); 931 if (team->ops.port_enabled) 932 team->ops.port_enabled(team, port); 933 team_notify_peers(team); 934 team_mcast_rejoin(team); 935} 936 937static void __reconstruct_port_hlist(struct team *team, int rm_index) 938{ 939 int i; 940 struct team_port *port; 941 942 for (i = rm_index + 1; i < team->en_port_count; i++) { 943 port = team_get_port_by_index(team, i); 944 hlist_del_rcu(&port->hlist); 945 port->index--; 946 hlist_add_head_rcu(&port->hlist, 947 team_port_index_hash(team, port->index)); 948 } 949} 950 951static void team_port_disable(struct team *team, 952 struct team_port *port) 953{ 954 if (!team_port_enabled(port)) 955 return; 956 if (team->ops.port_disabled) 957 team->ops.port_disabled(team, port); 958 hlist_del_rcu(&port->hlist); 959 __reconstruct_port_hlist(team, port->index); 960 port->index = -1; 961 team->en_port_count--; 962 team_queue_override_port_del(team, port); 963 team_adjust_ops(team); 964 team_notify_peers(team); 965 team_mcast_rejoin(team); 966} 967 968#define TEAM_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \ 969 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \ 970 NETIF_F_HIGHDMA | NETIF_F_LRO) 971 972static void __team_compute_features(struct team *team) 973{ 974 struct team_port *port; 975 u32 vlan_features = TEAM_VLAN_FEATURES & NETIF_F_ALL_FOR_ALL; 976 unsigned short max_hard_header_len = ETH_HLEN; 977 unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE | 978 IFF_XMIT_DST_RELEASE_PERM; 979 980 list_for_each_entry(port, &team->port_list, list) { 981 vlan_features = netdev_increment_features(vlan_features, 982 port->dev->vlan_features, 983 TEAM_VLAN_FEATURES); 984 985 dst_release_flag &= port->dev->priv_flags; 986 if (port->dev->hard_header_len > max_hard_header_len) 987 max_hard_header_len = port->dev->hard_header_len; 988 } 989 990 team->dev->vlan_features = vlan_features; 991 team->dev->hard_header_len = max_hard_header_len; 992 993 team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; 994 if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM)) 995 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE; 996 997 netdev_change_features(team->dev); 998} 999 1000static void team_compute_features(struct team *team) 1001{ 1002 mutex_lock(&team->lock); 1003 __team_compute_features(team); 1004 mutex_unlock(&team->lock); 1005} 1006 1007static int team_port_enter(struct team *team, struct team_port *port) 1008{ 1009 int err = 0; 1010 1011 dev_hold(team->dev); 1012 if (team->ops.port_enter) { 1013 err = team->ops.port_enter(team, port); 1014 if (err) { 1015 netdev_err(team->dev, "Device %s failed to enter team mode\n", 1016 port->dev->name); 1017 goto err_port_enter; 1018 } 1019 } 1020 1021 return 0; 1022 1023err_port_enter: 1024 dev_put(team->dev); 1025 1026 return err; 1027} 1028 1029static void team_port_leave(struct team *team, struct team_port *port) 1030{ 1031 if (team->ops.port_leave) 1032 team->ops.port_leave(team, port); 1033 dev_put(team->dev); 1034} 1035 1036#ifdef CONFIG_NET_POLL_CONTROLLER 1037static int team_port_enable_netpoll(struct team *team, struct team_port *port) 1038{ 1039 struct netpoll *np; 1040 int err; 1041 1042 if (!team->dev->npinfo) 1043 return 0; 1044 1045 np = kzalloc(sizeof(*np), GFP_KERNEL); 1046 if (!np) 1047 return -ENOMEM; 1048 1049 err = __netpoll_setup(np, port->dev); 1050 if (err) { 1051 kfree(np); 1052 return err; 1053 } 1054 port->np = np; 1055 return err; 1056} 1057 1058static void team_port_disable_netpoll(struct team_port *port) 1059{ 1060 struct netpoll *np = port->np; 1061 1062 if (!np) 1063 return; 1064 port->np = NULL; 1065 1066 /* Wait for transmitting packets to finish before freeing. */ 1067 synchronize_rcu_bh(); 1068 __netpoll_cleanup(np); 1069 kfree(np); 1070} 1071#else 1072static int team_port_enable_netpoll(struct team *team, struct team_port *port) 1073{ 1074 return 0; 1075} 1076static void team_port_disable_netpoll(struct team_port *port) 1077{ 1078} 1079#endif 1080 1081static int team_upper_dev_link(struct net_device *dev, 1082 struct net_device *port_dev) 1083{ 1084 int err; 1085 1086 err = netdev_master_upper_dev_link(port_dev, dev); 1087 if (err) 1088 return err; 1089 port_dev->priv_flags |= IFF_TEAM_PORT; 1090 return 0; 1091} 1092 1093static void team_upper_dev_unlink(struct net_device *dev, 1094 struct net_device *port_dev) 1095{ 1096 netdev_upper_dev_unlink(port_dev, dev); 1097 port_dev->priv_flags &= ~IFF_TEAM_PORT; 1098} 1099 1100static void __team_port_change_port_added(struct team_port *port, bool linkup); 1101static int team_dev_type_check_change(struct net_device *dev, 1102 struct net_device *port_dev); 1103 1104static int team_port_add(struct team *team, struct net_device *port_dev) 1105{ 1106 struct net_device *dev = team->dev; 1107 struct team_port *port; 1108 char *portname = port_dev->name; 1109 int err; 1110 1111 if (port_dev->flags & IFF_LOOPBACK) { 1112 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n", 1113 portname); 1114 return -EINVAL; 1115 } 1116 1117 if (team_port_exists(port_dev)) { 1118 netdev_err(dev, "Device %s is already a port " 1119 "of a team device\n", portname); 1120 return -EBUSY; 1121 } 1122 1123 if (port_dev->features & NETIF_F_VLAN_CHALLENGED && 1124 vlan_uses_dev(dev)) { 1125 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n", 1126 portname); 1127 return -EPERM; 1128 } 1129 1130 err = team_dev_type_check_change(dev, port_dev); 1131 if (err) 1132 return err; 1133 1134 if (port_dev->flags & IFF_UP) { 1135 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n", 1136 portname); 1137 return -EBUSY; 1138 } 1139 1140 port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size, 1141 GFP_KERNEL); 1142 if (!port) 1143 return -ENOMEM; 1144 1145 port->dev = port_dev; 1146 port->team = team; 1147 INIT_LIST_HEAD(&port->qom_list); 1148 1149 port->orig.mtu = port_dev->mtu; 1150 err = dev_set_mtu(port_dev, dev->mtu); 1151 if (err) { 1152 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err); 1153 goto err_set_mtu; 1154 } 1155 1156 memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len); 1157 1158 err = team_port_enter(team, port); 1159 if (err) { 1160 netdev_err(dev, "Device %s failed to enter team mode\n", 1161 portname); 1162 goto err_port_enter; 1163 } 1164 1165 err = dev_open(port_dev); 1166 if (err) { 1167 netdev_dbg(dev, "Device %s opening failed\n", 1168 portname); 1169 goto err_dev_open; 1170 } 1171 1172 err = vlan_vids_add_by_dev(port_dev, dev); 1173 if (err) { 1174 netdev_err(dev, "Failed to add vlan ids to device %s\n", 1175 portname); 1176 goto err_vids_add; 1177 } 1178 1179 err = team_port_enable_netpoll(team, port); 1180 if (err) { 1181 netdev_err(dev, "Failed to enable netpoll on device %s\n", 1182 portname); 1183 goto err_enable_netpoll; 1184 } 1185 1186 if (!(dev->features & NETIF_F_LRO)) 1187 dev_disable_lro(port_dev); 1188 1189 err = netdev_rx_handler_register(port_dev, team_handle_frame, 1190 port); 1191 if (err) { 1192 netdev_err(dev, "Device %s failed to register rx_handler\n", 1193 portname); 1194 goto err_handler_register; 1195 } 1196 1197 err = team_upper_dev_link(dev, port_dev); 1198 if (err) { 1199 netdev_err(dev, "Device %s failed to set upper link\n", 1200 portname); 1201 goto err_set_upper_link; 1202 } 1203 1204 err = __team_option_inst_add_port(team, port); 1205 if (err) { 1206 netdev_err(dev, "Device %s failed to add per-port options\n", 1207 portname); 1208 goto err_option_port_add; 1209 } 1210 1211 port->index = -1; 1212 list_add_tail_rcu(&port->list, &team->port_list); 1213 team_port_enable(team, port); 1214 __team_compute_features(team); 1215 __team_port_change_port_added(port, !!netif_carrier_ok(port_dev)); 1216 __team_options_change_check(team); 1217 1218 netdev_info(dev, "Port device %s added\n", portname); 1219 1220 return 0; 1221 1222err_option_port_add: 1223 team_upper_dev_unlink(dev, port_dev); 1224 1225err_set_upper_link: 1226 netdev_rx_handler_unregister(port_dev); 1227 1228err_handler_register: 1229 team_port_disable_netpoll(port); 1230 1231err_enable_netpoll: 1232 vlan_vids_del_by_dev(port_dev, dev); 1233 1234err_vids_add: 1235 dev_close(port_dev); 1236 1237err_dev_open: 1238 team_port_leave(team, port); 1239 team_port_set_orig_dev_addr(port); 1240 1241err_port_enter: 1242 dev_set_mtu(port_dev, port->orig.mtu); 1243 1244err_set_mtu: 1245 kfree(port); 1246 1247 return err; 1248} 1249 1250static void __team_port_change_port_removed(struct team_port *port); 1251 1252static int team_port_del(struct team *team, struct net_device *port_dev) 1253{ 1254 struct net_device *dev = team->dev; 1255 struct team_port *port; 1256 char *portname = port_dev->name; 1257 1258 port = team_port_get_rtnl(port_dev); 1259 if (!port || !team_port_find(team, port)) { 1260 netdev_err(dev, "Device %s does not act as a port of this team\n", 1261 portname); 1262 return -ENOENT; 1263 } 1264 1265 team_port_disable(team, port); 1266 list_del_rcu(&port->list); 1267 team_upper_dev_unlink(dev, port_dev); 1268 netdev_rx_handler_unregister(port_dev); 1269 team_port_disable_netpoll(port); 1270 vlan_vids_del_by_dev(port_dev, dev); 1271 dev_uc_unsync(port_dev, dev); 1272 dev_mc_unsync(port_dev, dev); 1273 dev_close(port_dev); 1274 team_port_leave(team, port); 1275 1276 __team_option_inst_mark_removed_port(team, port); 1277 __team_options_change_check(team); 1278 __team_option_inst_del_port(team, port); 1279 __team_port_change_port_removed(port); 1280 1281 team_port_set_orig_dev_addr(port); 1282 dev_set_mtu(port_dev, port->orig.mtu); 1283 kfree_rcu(port, rcu); 1284 netdev_info(dev, "Port device %s removed\n", portname); 1285 __team_compute_features(team); 1286 1287 return 0; 1288} 1289 1290 1291/***************** 1292 * Net device ops 1293 *****************/ 1294 1295static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx) 1296{ 1297 ctx->data.str_val = team->mode->kind; 1298 return 0; 1299} 1300 1301static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx) 1302{ 1303 return team_change_mode(team, ctx->data.str_val); 1304} 1305 1306static int team_notify_peers_count_get(struct team *team, 1307 struct team_gsetter_ctx *ctx) 1308{ 1309 ctx->data.u32_val = team->notify_peers.count; 1310 return 0; 1311} 1312 1313static int team_notify_peers_count_set(struct team *team, 1314 struct team_gsetter_ctx *ctx) 1315{ 1316 team->notify_peers.count = ctx->data.u32_val; 1317 return 0; 1318} 1319 1320static int team_notify_peers_interval_get(struct team *team, 1321 struct team_gsetter_ctx *ctx) 1322{ 1323 ctx->data.u32_val = team->notify_peers.interval; 1324 return 0; 1325} 1326 1327static int team_notify_peers_interval_set(struct team *team, 1328 struct team_gsetter_ctx *ctx) 1329{ 1330 team->notify_peers.interval = ctx->data.u32_val; 1331 return 0; 1332} 1333 1334static int team_mcast_rejoin_count_get(struct team *team, 1335 struct team_gsetter_ctx *ctx) 1336{ 1337 ctx->data.u32_val = team->mcast_rejoin.count; 1338 return 0; 1339} 1340 1341static int team_mcast_rejoin_count_set(struct team *team, 1342 struct team_gsetter_ctx *ctx) 1343{ 1344 team->mcast_rejoin.count = ctx->data.u32_val; 1345 return 0; 1346} 1347 1348static int team_mcast_rejoin_interval_get(struct team *team, 1349 struct team_gsetter_ctx *ctx) 1350{ 1351 ctx->data.u32_val = team->mcast_rejoin.interval; 1352 return 0; 1353} 1354 1355static int team_mcast_rejoin_interval_set(struct team *team, 1356 struct team_gsetter_ctx *ctx) 1357{ 1358 team->mcast_rejoin.interval = ctx->data.u32_val; 1359 return 0; 1360} 1361 1362static int team_port_en_option_get(struct team *team, 1363 struct team_gsetter_ctx *ctx) 1364{ 1365 struct team_port *port = ctx->info->port; 1366 1367 ctx->data.bool_val = team_port_enabled(port); 1368 return 0; 1369} 1370 1371static int team_port_en_option_set(struct team *team, 1372 struct team_gsetter_ctx *ctx) 1373{ 1374 struct team_port *port = ctx->info->port; 1375 1376 if (ctx->data.bool_val) 1377 team_port_enable(team, port); 1378 else 1379 team_port_disable(team, port); 1380 return 0; 1381} 1382 1383static int team_user_linkup_option_get(struct team *team, 1384 struct team_gsetter_ctx *ctx) 1385{ 1386 struct team_port *port = ctx->info->port; 1387 1388 ctx->data.bool_val = port->user.linkup; 1389 return 0; 1390} 1391 1392static void __team_carrier_check(struct team *team); 1393 1394static int team_user_linkup_option_set(struct team *team, 1395 struct team_gsetter_ctx *ctx) 1396{ 1397 struct team_port *port = ctx->info->port; 1398 1399 port->user.linkup = ctx->data.bool_val; 1400 team_refresh_port_linkup(port); 1401 __team_carrier_check(port->team); 1402 return 0; 1403} 1404 1405static int team_user_linkup_en_option_get(struct team *team, 1406 struct team_gsetter_ctx *ctx) 1407{ 1408 struct team_port *port = ctx->info->port; 1409 1410 ctx->data.bool_val = port->user.linkup_enabled; 1411 return 0; 1412} 1413 1414static int team_user_linkup_en_option_set(struct team *team, 1415 struct team_gsetter_ctx *ctx) 1416{ 1417 struct team_port *port = ctx->info->port; 1418 1419 port->user.linkup_enabled = ctx->data.bool_val; 1420 team_refresh_port_linkup(port); 1421 __team_carrier_check(port->team); 1422 return 0; 1423} 1424 1425static int team_priority_option_get(struct team *team, 1426 struct team_gsetter_ctx *ctx) 1427{ 1428 struct team_port *port = ctx->info->port; 1429 1430 ctx->data.s32_val = port->priority; 1431 return 0; 1432} 1433 1434static int team_priority_option_set(struct team *team, 1435 struct team_gsetter_ctx *ctx) 1436{ 1437 struct team_port *port = ctx->info->port; 1438 s32 priority = ctx->data.s32_val; 1439 1440 if (port->priority == priority) 1441 return 0; 1442 port->priority = priority; 1443 team_queue_override_port_prio_changed(team, port); 1444 return 0; 1445} 1446 1447static int team_queue_id_option_get(struct team *team, 1448 struct team_gsetter_ctx *ctx) 1449{ 1450 struct team_port *port = ctx->info->port; 1451 1452 ctx->data.u32_val = port->queue_id; 1453 return 0; 1454} 1455 1456static int team_queue_id_option_set(struct team *team, 1457 struct team_gsetter_ctx *ctx) 1458{ 1459 struct team_port *port = ctx->info->port; 1460 u16 new_queue_id = ctx->data.u32_val; 1461 1462 if (port->queue_id == new_queue_id) 1463 return 0; 1464 if (new_queue_id >= team->dev->real_num_tx_queues) 1465 return -EINVAL; 1466 team_queue_override_port_change_queue_id(team, port, new_queue_id); 1467 return 0; 1468} 1469 1470static const struct team_option team_options[] = { 1471 { 1472 .name = "mode", 1473 .type = TEAM_OPTION_TYPE_STRING, 1474 .getter = team_mode_option_get, 1475 .setter = team_mode_option_set, 1476 }, 1477 { 1478 .name = "notify_peers_count", 1479 .type = TEAM_OPTION_TYPE_U32, 1480 .getter = team_notify_peers_count_get, 1481 .setter = team_notify_peers_count_set, 1482 }, 1483 { 1484 .name = "notify_peers_interval", 1485 .type = TEAM_OPTION_TYPE_U32, 1486 .getter = team_notify_peers_interval_get, 1487 .setter = team_notify_peers_interval_set, 1488 }, 1489 { 1490 .name = "mcast_rejoin_count", 1491 .type = TEAM_OPTION_TYPE_U32, 1492 .getter = team_mcast_rejoin_count_get, 1493 .setter = team_mcast_rejoin_count_set, 1494 }, 1495 { 1496 .name = "mcast_rejoin_interval", 1497 .type = TEAM_OPTION_TYPE_U32, 1498 .getter = team_mcast_rejoin_interval_get, 1499 .setter = team_mcast_rejoin_interval_set, 1500 }, 1501 { 1502 .name = "enabled", 1503 .type = TEAM_OPTION_TYPE_BOOL, 1504 .per_port = true, 1505 .getter = team_port_en_option_get, 1506 .setter = team_port_en_option_set, 1507 }, 1508 { 1509 .name = "user_linkup", 1510 .type = TEAM_OPTION_TYPE_BOOL, 1511 .per_port = true, 1512 .getter = team_user_linkup_option_get, 1513 .setter = team_user_linkup_option_set, 1514 }, 1515 { 1516 .name = "user_linkup_enabled", 1517 .type = TEAM_OPTION_TYPE_BOOL, 1518 .per_port = true, 1519 .getter = team_user_linkup_en_option_get, 1520 .setter = team_user_linkup_en_option_set, 1521 }, 1522 { 1523 .name = "priority", 1524 .type = TEAM_OPTION_TYPE_S32, 1525 .per_port = true, 1526 .getter = team_priority_option_get, 1527 .setter = team_priority_option_set, 1528 }, 1529 { 1530 .name = "queue_id", 1531 .type = TEAM_OPTION_TYPE_U32, 1532 .per_port = true, 1533 .getter = team_queue_id_option_get, 1534 .setter = team_queue_id_option_set, 1535 }, 1536}; 1537 1538static struct lock_class_key team_netdev_xmit_lock_key; 1539static struct lock_class_key team_netdev_addr_lock_key; 1540static struct lock_class_key team_tx_busylock_key; 1541 1542static void team_set_lockdep_class_one(struct net_device *dev, 1543 struct netdev_queue *txq, 1544 void *unused) 1545{ 1546 lockdep_set_class(&txq->_xmit_lock, &team_netdev_xmit_lock_key); 1547} 1548 1549static void team_set_lockdep_class(struct net_device *dev) 1550{ 1551 lockdep_set_class(&dev->addr_list_lock, &team_netdev_addr_lock_key); 1552 netdev_for_each_tx_queue(dev, team_set_lockdep_class_one, NULL); 1553 dev->qdisc_tx_busylock = &team_tx_busylock_key; 1554} 1555 1556static int team_init(struct net_device *dev) 1557{ 1558 struct team *team = netdev_priv(dev); 1559 int i; 1560 int err; 1561 1562 team->dev = dev; 1563 mutex_init(&team->lock); 1564 team_set_no_mode(team); 1565 1566 team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats); 1567 if (!team->pcpu_stats) 1568 return -ENOMEM; 1569 1570 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++) 1571 INIT_HLIST_HEAD(&team->en_port_hlist[i]); 1572 INIT_LIST_HEAD(&team->port_list); 1573 err = team_queue_override_init(team); 1574 if (err) 1575 goto err_team_queue_override_init; 1576 1577 team_adjust_ops(team); 1578 1579 INIT_LIST_HEAD(&team->option_list); 1580 INIT_LIST_HEAD(&team->option_inst_list); 1581 1582 team_notify_peers_init(team); 1583 team_mcast_rejoin_init(team); 1584 1585 err = team_options_register(team, team_options, ARRAY_SIZE(team_options)); 1586 if (err) 1587 goto err_options_register; 1588 netif_carrier_off(dev); 1589 1590 team_set_lockdep_class(dev); 1591 1592 return 0; 1593 1594err_options_register: 1595 team_mcast_rejoin_fini(team); 1596 team_notify_peers_fini(team); 1597 team_queue_override_fini(team); 1598err_team_queue_override_init: 1599 free_percpu(team->pcpu_stats); 1600 1601 return err; 1602} 1603 1604static void team_uninit(struct net_device *dev) 1605{ 1606 struct team *team = netdev_priv(dev); 1607 struct team_port *port; 1608 struct team_port *tmp; 1609 1610 mutex_lock(&team->lock); 1611 list_for_each_entry_safe(port, tmp, &team->port_list, list) 1612 team_port_del(team, port->dev); 1613 1614 __team_change_mode(team, NULL); /* cleanup */ 1615 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options)); 1616 team_mcast_rejoin_fini(team); 1617 team_notify_peers_fini(team); 1618 team_queue_override_fini(team); 1619 mutex_unlock(&team->lock); 1620} 1621 1622static void team_destructor(struct net_device *dev) 1623{ 1624 struct team *team = netdev_priv(dev); 1625 1626 free_percpu(team->pcpu_stats); 1627 free_netdev(dev); 1628} 1629 1630static int team_open(struct net_device *dev) 1631{ 1632 return 0; 1633} 1634 1635static int team_close(struct net_device *dev) 1636{ 1637 return 0; 1638} 1639 1640/* 1641 * note: already called with rcu_read_lock 1642 */ 1643static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev) 1644{ 1645 struct team *team = netdev_priv(dev); 1646 bool tx_success; 1647 unsigned int len = skb->len; 1648 1649 tx_success = team_queue_override_transmit(team, skb); 1650 if (!tx_success) 1651 tx_success = team->ops.transmit(team, skb); 1652 if (tx_success) { 1653 struct team_pcpu_stats *pcpu_stats; 1654 1655 pcpu_stats = this_cpu_ptr(team->pcpu_stats); 1656 u64_stats_update_begin(&pcpu_stats->syncp); 1657 pcpu_stats->tx_packets++; 1658 pcpu_stats->tx_bytes += len; 1659 u64_stats_update_end(&pcpu_stats->syncp); 1660 } else { 1661 this_cpu_inc(team->pcpu_stats->tx_dropped); 1662 } 1663 1664 return NETDEV_TX_OK; 1665} 1666 1667static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb, 1668 void *accel_priv, select_queue_fallback_t fallback) 1669{ 1670 /* 1671 * This helper function exists to help dev_pick_tx get the correct 1672 * destination queue. Using a helper function skips a call to 1673 * skb_tx_hash and will put the skbs in the queue we expect on their 1674 * way down to the team driver. 1675 */ 1676 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0; 1677 1678 /* 1679 * Save the original txq to restore before passing to the driver 1680 */ 1681 qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping; 1682 1683 if (unlikely(txq >= dev->real_num_tx_queues)) { 1684 do { 1685 txq -= dev->real_num_tx_queues; 1686 } while (txq >= dev->real_num_tx_queues); 1687 } 1688 return txq; 1689} 1690 1691static void team_change_rx_flags(struct net_device *dev, int change) 1692{ 1693 struct team *team = netdev_priv(dev); 1694 struct team_port *port; 1695 int inc; 1696 1697 rcu_read_lock(); 1698 list_for_each_entry_rcu(port, &team->port_list, list) { 1699 if (change & IFF_PROMISC) { 1700 inc = dev->flags & IFF_PROMISC ? 1 : -1; 1701 dev_set_promiscuity(port->dev, inc); 1702 } 1703 if (change & IFF_ALLMULTI) { 1704 inc = dev->flags & IFF_ALLMULTI ? 1 : -1; 1705 dev_set_allmulti(port->dev, inc); 1706 } 1707 } 1708 rcu_read_unlock(); 1709} 1710 1711static void team_set_rx_mode(struct net_device *dev) 1712{ 1713 struct team *team = netdev_priv(dev); 1714 struct team_port *port; 1715 1716 rcu_read_lock(); 1717 list_for_each_entry_rcu(port, &team->port_list, list) { 1718 dev_uc_sync_multiple(port->dev, dev); 1719 dev_mc_sync_multiple(port->dev, dev); 1720 } 1721 rcu_read_unlock(); 1722} 1723 1724static int team_set_mac_address(struct net_device *dev, void *p) 1725{ 1726 struct sockaddr *addr = p; 1727 struct team *team = netdev_priv(dev); 1728 struct team_port *port; 1729 1730 if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data)) 1731 return -EADDRNOTAVAIL; 1732 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); 1733 mutex_lock(&team->lock); 1734 list_for_each_entry(port, &team->port_list, list) 1735 if (team->ops.port_change_dev_addr) 1736 team->ops.port_change_dev_addr(team, port); 1737 mutex_unlock(&team->lock); 1738 return 0; 1739} 1740 1741static int team_change_mtu(struct net_device *dev, int new_mtu) 1742{ 1743 struct team *team = netdev_priv(dev); 1744 struct team_port *port; 1745 int err; 1746 1747 /* 1748 * Alhough this is reader, it's guarded by team lock. It's not possible 1749 * to traverse list in reverse under rcu_read_lock 1750 */ 1751 mutex_lock(&team->lock); 1752 team->port_mtu_change_allowed = true; 1753 list_for_each_entry(port, &team->port_list, list) { 1754 err = dev_set_mtu(port->dev, new_mtu); 1755 if (err) { 1756 netdev_err(dev, "Device %s failed to change mtu", 1757 port->dev->name); 1758 goto unwind; 1759 } 1760 } 1761 team->port_mtu_change_allowed = false; 1762 mutex_unlock(&team->lock); 1763 1764 dev->mtu = new_mtu; 1765 1766 return 0; 1767 1768unwind: 1769 list_for_each_entry_continue_reverse(port, &team->port_list, list) 1770 dev_set_mtu(port->dev, dev->mtu); 1771 team->port_mtu_change_allowed = false; 1772 mutex_unlock(&team->lock); 1773 1774 return err; 1775} 1776 1777static struct rtnl_link_stats64 * 1778team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 1779{ 1780 struct team *team = netdev_priv(dev); 1781 struct team_pcpu_stats *p; 1782 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes; 1783 u32 rx_dropped = 0, tx_dropped = 0; 1784 unsigned int start; 1785 int i; 1786 1787 for_each_possible_cpu(i) { 1788 p = per_cpu_ptr(team->pcpu_stats, i); 1789 do { 1790 start = u64_stats_fetch_begin_irq(&p->syncp); 1791 rx_packets = p->rx_packets; 1792 rx_bytes = p->rx_bytes; 1793 rx_multicast = p->rx_multicast; 1794 tx_packets = p->tx_packets; 1795 tx_bytes = p->tx_bytes; 1796 } while (u64_stats_fetch_retry_irq(&p->syncp, start)); 1797 1798 stats->rx_packets += rx_packets; 1799 stats->rx_bytes += rx_bytes; 1800 stats->multicast += rx_multicast; 1801 stats->tx_packets += tx_packets; 1802 stats->tx_bytes += tx_bytes; 1803 /* 1804 * rx_dropped & tx_dropped are u32, updated 1805 * without syncp protection. 1806 */ 1807 rx_dropped += p->rx_dropped; 1808 tx_dropped += p->tx_dropped; 1809 } 1810 stats->rx_dropped = rx_dropped; 1811 stats->tx_dropped = tx_dropped; 1812 return stats; 1813} 1814 1815static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) 1816{ 1817 struct team *team = netdev_priv(dev); 1818 struct team_port *port; 1819 int err; 1820 1821 /* 1822 * Alhough this is reader, it's guarded by team lock. It's not possible 1823 * to traverse list in reverse under rcu_read_lock 1824 */ 1825 mutex_lock(&team->lock); 1826 list_for_each_entry(port, &team->port_list, list) { 1827 err = vlan_vid_add(port->dev, proto, vid); 1828 if (err) 1829 goto unwind; 1830 } 1831 mutex_unlock(&team->lock); 1832 1833 return 0; 1834 1835unwind: 1836 list_for_each_entry_continue_reverse(port, &team->port_list, list) 1837 vlan_vid_del(port->dev, proto, vid); 1838 mutex_unlock(&team->lock); 1839 1840 return err; 1841} 1842 1843static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid) 1844{ 1845 struct team *team = netdev_priv(dev); 1846 struct team_port *port; 1847 1848 mutex_lock(&team->lock); 1849 list_for_each_entry(port, &team->port_list, list) 1850 vlan_vid_del(port->dev, proto, vid); 1851 mutex_unlock(&team->lock); 1852 1853 return 0; 1854} 1855 1856#ifdef CONFIG_NET_POLL_CONTROLLER 1857static void team_poll_controller(struct net_device *dev) 1858{ 1859} 1860 1861static void __team_netpoll_cleanup(struct team *team) 1862{ 1863 struct team_port *port; 1864 1865 list_for_each_entry(port, &team->port_list, list) 1866 team_port_disable_netpoll(port); 1867} 1868 1869static void team_netpoll_cleanup(struct net_device *dev) 1870{ 1871 struct team *team = netdev_priv(dev); 1872 1873 mutex_lock(&team->lock); 1874 __team_netpoll_cleanup(team); 1875 mutex_unlock(&team->lock); 1876} 1877 1878static int team_netpoll_setup(struct net_device *dev, 1879 struct netpoll_info *npifo) 1880{ 1881 struct team *team = netdev_priv(dev); 1882 struct team_port *port; 1883 int err = 0; 1884 1885 mutex_lock(&team->lock); 1886 list_for_each_entry(port, &team->port_list, list) { 1887 err = team_port_enable_netpoll(team, port); 1888 if (err) { 1889 __team_netpoll_cleanup(team); 1890 break; 1891 } 1892 } 1893 mutex_unlock(&team->lock); 1894 return err; 1895} 1896#endif 1897 1898static int team_add_slave(struct net_device *dev, struct net_device *port_dev) 1899{ 1900 struct team *team = netdev_priv(dev); 1901 int err; 1902 1903 mutex_lock(&team->lock); 1904 err = team_port_add(team, port_dev); 1905 mutex_unlock(&team->lock); 1906 return err; 1907} 1908 1909static int team_del_slave(struct net_device *dev, struct net_device *port_dev) 1910{ 1911 struct team *team = netdev_priv(dev); 1912 int err; 1913 1914 mutex_lock(&team->lock); 1915 err = team_port_del(team, port_dev); 1916 mutex_unlock(&team->lock); 1917 return err; 1918} 1919 1920static netdev_features_t team_fix_features(struct net_device *dev, 1921 netdev_features_t features) 1922{ 1923 struct team_port *port; 1924 struct team *team = netdev_priv(dev); 1925 netdev_features_t mask; 1926 1927 mask = features | NETIF_F_HW_SWITCH_OFFLOAD; 1928 features &= ~NETIF_F_ONE_FOR_ALL; 1929 features |= NETIF_F_ALL_FOR_ALL; 1930 1931 rcu_read_lock(); 1932 list_for_each_entry_rcu(port, &team->port_list, list) { 1933 features = netdev_increment_features(features, 1934 port->dev->features, 1935 mask); 1936 } 1937 rcu_read_unlock(); 1938 1939 features = netdev_add_tso_features(features, mask); 1940 1941 return features; 1942} 1943 1944static int team_change_carrier(struct net_device *dev, bool new_carrier) 1945{ 1946 struct team *team = netdev_priv(dev); 1947 1948 team->user_carrier_enabled = true; 1949 1950 if (new_carrier) 1951 netif_carrier_on(dev); 1952 else 1953 netif_carrier_off(dev); 1954 return 0; 1955} 1956 1957static const struct net_device_ops team_netdev_ops = { 1958 .ndo_init = team_init, 1959 .ndo_uninit = team_uninit, 1960 .ndo_open = team_open, 1961 .ndo_stop = team_close, 1962 .ndo_start_xmit = team_xmit, 1963 .ndo_select_queue = team_select_queue, 1964 .ndo_change_rx_flags = team_change_rx_flags, 1965 .ndo_set_rx_mode = team_set_rx_mode, 1966 .ndo_set_mac_address = team_set_mac_address, 1967 .ndo_change_mtu = team_change_mtu, 1968 .ndo_get_stats64 = team_get_stats64, 1969 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid, 1970 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid, 1971#ifdef CONFIG_NET_POLL_CONTROLLER 1972 .ndo_poll_controller = team_poll_controller, 1973 .ndo_netpoll_setup = team_netpoll_setup, 1974 .ndo_netpoll_cleanup = team_netpoll_cleanup, 1975#endif 1976 .ndo_add_slave = team_add_slave, 1977 .ndo_del_slave = team_del_slave, 1978 .ndo_fix_features = team_fix_features, 1979 .ndo_change_carrier = team_change_carrier, 1980 .ndo_bridge_setlink = ndo_dflt_netdev_switch_port_bridge_setlink, 1981 .ndo_bridge_dellink = ndo_dflt_netdev_switch_port_bridge_dellink, 1982 .ndo_features_check = passthru_features_check, 1983}; 1984 1985/*********************** 1986 * ethtool interface 1987 ***********************/ 1988 1989static void team_ethtool_get_drvinfo(struct net_device *dev, 1990 struct ethtool_drvinfo *drvinfo) 1991{ 1992 strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver)); 1993 strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version)); 1994} 1995 1996static const struct ethtool_ops team_ethtool_ops = { 1997 .get_drvinfo = team_ethtool_get_drvinfo, 1998 .get_link = ethtool_op_get_link, 1999}; 2000 2001/*********************** 2002 * rt netlink interface 2003 ***********************/ 2004 2005static void team_setup_by_port(struct net_device *dev, 2006 struct net_device *port_dev) 2007{ 2008 dev->header_ops = port_dev->header_ops; 2009 dev->type = port_dev->type; 2010 dev->hard_header_len = port_dev->hard_header_len; 2011 dev->addr_len = port_dev->addr_len; 2012 dev->mtu = port_dev->mtu; 2013 memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len); 2014 eth_hw_addr_inherit(dev, port_dev); 2015} 2016 2017static int team_dev_type_check_change(struct net_device *dev, 2018 struct net_device *port_dev) 2019{ 2020 struct team *team = netdev_priv(dev); 2021 char *portname = port_dev->name; 2022 int err; 2023 2024 if (dev->type == port_dev->type) 2025 return 0; 2026 if (!list_empty(&team->port_list)) { 2027 netdev_err(dev, "Device %s is of different type\n", portname); 2028 return -EBUSY; 2029 } 2030 err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev); 2031 err = notifier_to_errno(err); 2032 if (err) { 2033 netdev_err(dev, "Refused to change device type\n"); 2034 return err; 2035 } 2036 dev_uc_flush(dev); 2037 dev_mc_flush(dev); 2038 team_setup_by_port(dev, port_dev); 2039 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev); 2040 return 0; 2041} 2042 2043static void team_setup(struct net_device *dev) 2044{ 2045 ether_setup(dev); 2046 2047 dev->netdev_ops = &team_netdev_ops; 2048 dev->ethtool_ops = &team_ethtool_ops; 2049 dev->destructor = team_destructor; 2050 dev->tx_queue_len = 0; 2051 dev->flags |= IFF_MULTICAST; 2052 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); 2053 2054 /* 2055 * Indicate we support unicast address filtering. That way core won't 2056 * bring us to promisc mode in case a unicast addr is added. 2057 * Let this up to underlay drivers. 2058 */ 2059 dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE; 2060 2061 dev->features |= NETIF_F_LLTX; 2062 dev->features |= NETIF_F_GRO; 2063 2064 /* Don't allow team devices to change network namespaces. */ 2065 dev->features |= NETIF_F_NETNS_LOCAL; 2066 2067 dev->hw_features = TEAM_VLAN_FEATURES | 2068 NETIF_F_HW_VLAN_CTAG_TX | 2069 NETIF_F_HW_VLAN_CTAG_RX | 2070 NETIF_F_HW_VLAN_CTAG_FILTER; 2071 2072 dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_HW_CSUM); 2073 dev->features |= dev->hw_features; 2074} 2075 2076static int team_newlink(struct net *src_net, struct net_device *dev, 2077 struct nlattr *tb[], struct nlattr *data[]) 2078{ 2079 if (tb[IFLA_ADDRESS] == NULL) 2080 eth_hw_addr_random(dev); 2081 2082 return register_netdevice(dev); 2083} 2084 2085static int team_validate(struct nlattr *tb[], struct nlattr *data[]) 2086{ 2087 if (tb[IFLA_ADDRESS]) { 2088 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) 2089 return -EINVAL; 2090 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) 2091 return -EADDRNOTAVAIL; 2092 } 2093 return 0; 2094} 2095 2096static unsigned int team_get_num_tx_queues(void) 2097{ 2098 return TEAM_DEFAULT_NUM_TX_QUEUES; 2099} 2100 2101static unsigned int team_get_num_rx_queues(void) 2102{ 2103 return TEAM_DEFAULT_NUM_RX_QUEUES; 2104} 2105 2106static struct rtnl_link_ops team_link_ops __read_mostly = { 2107 .kind = DRV_NAME, 2108 .priv_size = sizeof(struct team), 2109 .setup = team_setup, 2110 .newlink = team_newlink, 2111 .validate = team_validate, 2112 .get_num_tx_queues = team_get_num_tx_queues, 2113 .get_num_rx_queues = team_get_num_rx_queues, 2114}; 2115 2116 2117/*********************************** 2118 * Generic netlink custom interface 2119 ***********************************/ 2120 2121static struct genl_family team_nl_family = { 2122 .id = GENL_ID_GENERATE, 2123 .name = TEAM_GENL_NAME, 2124 .version = TEAM_GENL_VERSION, 2125 .maxattr = TEAM_ATTR_MAX, 2126 .netnsok = true, 2127}; 2128 2129static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = { 2130 [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, }, 2131 [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 }, 2132 [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED }, 2133 [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED }, 2134}; 2135 2136static const struct nla_policy 2137team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = { 2138 [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, }, 2139 [TEAM_ATTR_OPTION_NAME] = { 2140 .type = NLA_STRING, 2141 .len = TEAM_STRING_MAX_LEN, 2142 }, 2143 [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG }, 2144 [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 }, 2145 [TEAM_ATTR_OPTION_DATA] = { .type = NLA_BINARY }, 2146}; 2147 2148static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info) 2149{ 2150 struct sk_buff *msg; 2151 void *hdr; 2152 int err; 2153 2154 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 2155 if (!msg) 2156 return -ENOMEM; 2157 2158 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq, 2159 &team_nl_family, 0, TEAM_CMD_NOOP); 2160 if (!hdr) { 2161 err = -EMSGSIZE; 2162 goto err_msg_put; 2163 } 2164 2165 genlmsg_end(msg, hdr); 2166 2167 return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid); 2168 2169err_msg_put: 2170 nlmsg_free(msg); 2171 2172 return err; 2173} 2174 2175/* 2176 * Netlink cmd functions should be locked by following two functions. 2177 * Since dev gets held here, that ensures dev won't disappear in between. 2178 */ 2179static struct team *team_nl_team_get(struct genl_info *info) 2180{ 2181 struct net *net = genl_info_net(info); 2182 int ifindex; 2183 struct net_device *dev; 2184 struct team *team; 2185 2186 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX]) 2187 return NULL; 2188 2189 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]); 2190 dev = dev_get_by_index(net, ifindex); 2191 if (!dev || dev->netdev_ops != &team_netdev_ops) { 2192 if (dev) 2193 dev_put(dev); 2194 return NULL; 2195 } 2196 2197 team = netdev_priv(dev); 2198 mutex_lock(&team->lock); 2199 return team; 2200} 2201 2202static void team_nl_team_put(struct team *team) 2203{ 2204 mutex_unlock(&team->lock); 2205 dev_put(team->dev); 2206} 2207 2208typedef int team_nl_send_func_t(struct sk_buff *skb, 2209 struct team *team, u32 portid); 2210 2211static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid) 2212{ 2213 return genlmsg_unicast(dev_net(team->dev), skb, portid); 2214} 2215 2216static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team, 2217 struct team_option_inst *opt_inst) 2218{ 2219 struct nlattr *option_item; 2220 struct team_option *option = opt_inst->option; 2221 struct team_option_inst_info *opt_inst_info = &opt_inst->info; 2222 struct team_gsetter_ctx ctx; 2223 int err; 2224 2225 ctx.info = opt_inst_info; 2226 err = team_option_get(team, opt_inst, &ctx); 2227 if (err) 2228 return err; 2229 2230 option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION); 2231 if (!option_item) 2232 return -EMSGSIZE; 2233 2234 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name)) 2235 goto nest_cancel; 2236 if (opt_inst_info->port && 2237 nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX, 2238 opt_inst_info->port->dev->ifindex)) 2239 goto nest_cancel; 2240 if (opt_inst->option->array_size && 2241 nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX, 2242 opt_inst_info->array_index)) 2243 goto nest_cancel; 2244 2245 switch (option->type) { 2246 case TEAM_OPTION_TYPE_U32: 2247 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32)) 2248 goto nest_cancel; 2249 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val)) 2250 goto nest_cancel; 2251 break; 2252 case TEAM_OPTION_TYPE_STRING: 2253 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING)) 2254 goto nest_cancel; 2255 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA, 2256 ctx.data.str_val)) 2257 goto nest_cancel; 2258 break; 2259 case TEAM_OPTION_TYPE_BINARY: 2260 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY)) 2261 goto nest_cancel; 2262 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len, 2263 ctx.data.bin_val.ptr)) 2264 goto nest_cancel; 2265 break; 2266 case TEAM_OPTION_TYPE_BOOL: 2267 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG)) 2268 goto nest_cancel; 2269 if (ctx.data.bool_val && 2270 nla_put_flag(skb, TEAM_ATTR_OPTION_DATA)) 2271 goto nest_cancel; 2272 break; 2273 case TEAM_OPTION_TYPE_S32: 2274 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32)) 2275 goto nest_cancel; 2276 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val)) 2277 goto nest_cancel; 2278 break; 2279 default: 2280 BUG(); 2281 } 2282 if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED)) 2283 goto nest_cancel; 2284 if (opt_inst->changed) { 2285 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED)) 2286 goto nest_cancel; 2287 opt_inst->changed = false; 2288 } 2289 nla_nest_end(skb, option_item); 2290 return 0; 2291 2292nest_cancel: 2293 nla_nest_cancel(skb, option_item); 2294 return -EMSGSIZE; 2295} 2296 2297static int __send_and_alloc_skb(struct sk_buff **pskb, 2298 struct team *team, u32 portid, 2299 team_nl_send_func_t *send_func) 2300{ 2301 int err; 2302 2303 if (*pskb) { 2304 err = send_func(*pskb, team, portid); 2305 if (err) 2306 return err; 2307 } 2308 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL); 2309 if (!*pskb) 2310 return -ENOMEM; 2311 return 0; 2312} 2313 2314static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq, 2315 int flags, team_nl_send_func_t *send_func, 2316 struct list_head *sel_opt_inst_list) 2317{ 2318 struct nlattr *option_list; 2319 struct nlmsghdr *nlh; 2320 void *hdr; 2321 struct team_option_inst *opt_inst; 2322 int err; 2323 struct sk_buff *skb = NULL; 2324 bool incomplete; 2325 int i; 2326 2327 opt_inst = list_first_entry(sel_opt_inst_list, 2328 struct team_option_inst, tmp_list); 2329 2330start_again: 2331 err = __send_and_alloc_skb(&skb, team, portid, send_func); 2332 if (err) 2333 return err; 2334 2335 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI, 2336 TEAM_CMD_OPTIONS_GET); 2337 if (!hdr) 2338 return -EMSGSIZE; 2339 2340 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex)) 2341 goto nla_put_failure; 2342 option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION); 2343 if (!option_list) 2344 goto nla_put_failure; 2345 2346 i = 0; 2347 incomplete = false; 2348 list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) { 2349 err = team_nl_fill_one_option_get(skb, team, opt_inst); 2350 if (err) { 2351 if (err == -EMSGSIZE) { 2352 if (!i) 2353 goto errout; 2354 incomplete = true; 2355 break; 2356 } 2357 goto errout; 2358 } 2359 i++; 2360 } 2361 2362 nla_nest_end(skb, option_list); 2363 genlmsg_end(skb, hdr); 2364 if (incomplete) 2365 goto start_again; 2366 2367send_done: 2368 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI); 2369 if (!nlh) { 2370 err = __send_and_alloc_skb(&skb, team, portid, send_func); 2371 if (err) 2372 goto errout; 2373 goto send_done; 2374 } 2375 2376 return send_func(skb, team, portid); 2377 2378nla_put_failure: 2379 err = -EMSGSIZE; 2380errout: 2381 genlmsg_cancel(skb, hdr); 2382 nlmsg_free(skb); 2383 return err; 2384} 2385 2386static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info) 2387{ 2388 struct team *team; 2389 struct team_option_inst *opt_inst; 2390 int err; 2391 LIST_HEAD(sel_opt_inst_list); 2392 2393 team = team_nl_team_get(info); 2394 if (!team) 2395 return -EINVAL; 2396 2397 list_for_each_entry(opt_inst, &team->option_inst_list, list) 2398 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list); 2399 err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq, 2400 NLM_F_ACK, team_nl_send_unicast, 2401 &sel_opt_inst_list); 2402 2403 team_nl_team_put(team); 2404 2405 return err; 2406} 2407 2408static int team_nl_send_event_options_get(struct team *team, 2409 struct list_head *sel_opt_inst_list); 2410 2411static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info) 2412{ 2413 struct team *team; 2414 int err = 0; 2415 int i; 2416 struct nlattr *nl_option; 2417 LIST_HEAD(opt_inst_list); 2418 2419 team = team_nl_team_get(info); 2420 if (!team) 2421 return -EINVAL; 2422 2423 err = -EINVAL; 2424 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) { 2425 err = -EINVAL; 2426 goto team_put; 2427 } 2428 2429 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) { 2430 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1]; 2431 struct nlattr *attr; 2432 struct nlattr *attr_data; 2433 enum team_option_type opt_type; 2434 int opt_port_ifindex = 0; /* != 0 for per-port options */ 2435 u32 opt_array_index = 0; 2436 bool opt_is_array = false; 2437 struct team_option_inst *opt_inst; 2438 char *opt_name; 2439 bool opt_found = false; 2440 2441 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) { 2442 err = -EINVAL; 2443 goto team_put; 2444 } 2445 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX, 2446 nl_option, team_nl_option_policy); 2447 if (err) 2448 goto team_put; 2449 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] || 2450 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) { 2451 err = -EINVAL; 2452 goto team_put; 2453 } 2454 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) { 2455 case NLA_U32: 2456 opt_type = TEAM_OPTION_TYPE_U32; 2457 break; 2458 case NLA_STRING: 2459 opt_type = TEAM_OPTION_TYPE_STRING; 2460 break; 2461 case NLA_BINARY: 2462 opt_type = TEAM_OPTION_TYPE_BINARY; 2463 break; 2464 case NLA_FLAG: 2465 opt_type = TEAM_OPTION_TYPE_BOOL; 2466 break; 2467 case NLA_S32: 2468 opt_type = TEAM_OPTION_TYPE_S32; 2469 break; 2470 default: 2471 goto team_put; 2472 } 2473 2474 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA]; 2475 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) { 2476 err = -EINVAL; 2477 goto team_put; 2478 } 2479 2480 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]); 2481 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX]; 2482 if (attr) 2483 opt_port_ifindex = nla_get_u32(attr); 2484 2485 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX]; 2486 if (attr) { 2487 opt_is_array = true; 2488 opt_array_index = nla_get_u32(attr); 2489 } 2490 2491 list_for_each_entry(opt_inst, &team->option_inst_list, list) { 2492 struct team_option *option = opt_inst->option; 2493 struct team_gsetter_ctx ctx; 2494 struct team_option_inst_info *opt_inst_info; 2495 int tmp_ifindex; 2496 2497 opt_inst_info = &opt_inst->info; 2498 tmp_ifindex = opt_inst_info->port ? 2499 opt_inst_info->port->dev->ifindex : 0; 2500 if (option->type != opt_type || 2501 strcmp(option->name, opt_name) || 2502 tmp_ifindex != opt_port_ifindex || 2503 (option->array_size && !opt_is_array) || 2504 opt_inst_info->array_index != opt_array_index) 2505 continue; 2506 opt_found = true; 2507 ctx.info = opt_inst_info; 2508 switch (opt_type) { 2509 case TEAM_OPTION_TYPE_U32: 2510 ctx.data.u32_val = nla_get_u32(attr_data); 2511 break; 2512 case TEAM_OPTION_TYPE_STRING: 2513 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) { 2514 err = -EINVAL; 2515 goto team_put; 2516 } 2517 ctx.data.str_val = nla_data(attr_data); 2518 break; 2519 case TEAM_OPTION_TYPE_BINARY: 2520 ctx.data.bin_val.len = nla_len(attr_data); 2521 ctx.data.bin_val.ptr = nla_data(attr_data); 2522 break; 2523 case TEAM_OPTION_TYPE_BOOL: 2524 ctx.data.bool_val = attr_data ? true : false; 2525 break; 2526 case TEAM_OPTION_TYPE_S32: 2527 ctx.data.s32_val = nla_get_s32(attr_data); 2528 break; 2529 default: 2530 BUG(); 2531 } 2532 err = team_option_set(team, opt_inst, &ctx); 2533 if (err) 2534 goto team_put; 2535 opt_inst->changed = true; 2536 list_add(&opt_inst->tmp_list, &opt_inst_list); 2537 } 2538 if (!opt_found) { 2539 err = -ENOENT; 2540 goto team_put; 2541 } 2542 } 2543 2544 err = team_nl_send_event_options_get(team, &opt_inst_list); 2545 2546team_put: 2547 team_nl_team_put(team); 2548 2549 return err; 2550} 2551 2552static int team_nl_fill_one_port_get(struct sk_buff *skb, 2553 struct team_port *port) 2554{ 2555 struct nlattr *port_item; 2556 2557 port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT); 2558 if (!port_item) 2559 goto nest_cancel; 2560 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex)) 2561 goto nest_cancel; 2562 if (port->changed) { 2563 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED)) 2564 goto nest_cancel; 2565 port->changed = false; 2566 } 2567 if ((port->removed && 2568 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) || 2569 (port->state.linkup && 2570 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) || 2571 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) || 2572 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex)) 2573 goto nest_cancel; 2574 nla_nest_end(skb, port_item); 2575 return 0; 2576 2577nest_cancel: 2578 nla_nest_cancel(skb, port_item); 2579 return -EMSGSIZE; 2580} 2581 2582static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq, 2583 int flags, team_nl_send_func_t *send_func, 2584 struct team_port *one_port) 2585{ 2586 struct nlattr *port_list; 2587 struct nlmsghdr *nlh; 2588 void *hdr; 2589 struct team_port *port; 2590 int err; 2591 struct sk_buff *skb = NULL; 2592 bool incomplete; 2593 int i; 2594 2595 port = list_first_entry_or_null(&team->port_list, 2596 struct team_port, list); 2597 2598start_again: 2599 err = __send_and_alloc_skb(&skb, team, portid, send_func); 2600 if (err) 2601 return err; 2602 2603 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI, 2604 TEAM_CMD_PORT_LIST_GET); 2605 if (!hdr) 2606 return -EMSGSIZE; 2607 2608 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex)) 2609 goto nla_put_failure; 2610 port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT); 2611 if (!port_list) 2612 goto nla_put_failure; 2613 2614 i = 0; 2615 incomplete = false; 2616 2617 /* If one port is selected, called wants to send port list containing 2618 * only this port. Otherwise go through all listed ports and send all 2619 */ 2620 if (one_port) { 2621 err = team_nl_fill_one_port_get(skb, one_port); 2622 if (err) 2623 goto errout; 2624 } else if (port) { 2625 list_for_each_entry_from(port, &team->port_list, list) { 2626 err = team_nl_fill_one_port_get(skb, port); 2627 if (err) { 2628 if (err == -EMSGSIZE) { 2629 if (!i) 2630 goto errout; 2631 incomplete = true; 2632 break; 2633 } 2634 goto errout; 2635 } 2636 i++; 2637 } 2638 } 2639 2640 nla_nest_end(skb, port_list); 2641 genlmsg_end(skb, hdr); 2642 if (incomplete) 2643 goto start_again; 2644 2645send_done: 2646 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI); 2647 if (!nlh) { 2648 err = __send_and_alloc_skb(&skb, team, portid, send_func); 2649 if (err) 2650 goto errout; 2651 goto send_done; 2652 } 2653 2654 return send_func(skb, team, portid); 2655 2656nla_put_failure: 2657 err = -EMSGSIZE; 2658errout: 2659 genlmsg_cancel(skb, hdr); 2660 nlmsg_free(skb); 2661 return err; 2662} 2663 2664static int team_nl_cmd_port_list_get(struct sk_buff *skb, 2665 struct genl_info *info) 2666{ 2667 struct team *team; 2668 int err; 2669 2670 team = team_nl_team_get(info); 2671 if (!team) 2672 return -EINVAL; 2673 2674 err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq, 2675 NLM_F_ACK, team_nl_send_unicast, NULL); 2676 2677 team_nl_team_put(team); 2678 2679 return err; 2680} 2681 2682static const struct genl_ops team_nl_ops[] = { 2683 { 2684 .cmd = TEAM_CMD_NOOP, 2685 .doit = team_nl_cmd_noop, 2686 .policy = team_nl_policy, 2687 }, 2688 { 2689 .cmd = TEAM_CMD_OPTIONS_SET, 2690 .doit = team_nl_cmd_options_set, 2691 .policy = team_nl_policy, 2692 .flags = GENL_ADMIN_PERM, 2693 }, 2694 { 2695 .cmd = TEAM_CMD_OPTIONS_GET, 2696 .doit = team_nl_cmd_options_get, 2697 .policy = team_nl_policy, 2698 .flags = GENL_ADMIN_PERM, 2699 }, 2700 { 2701 .cmd = TEAM_CMD_PORT_LIST_GET, 2702 .doit = team_nl_cmd_port_list_get, 2703 .policy = team_nl_policy, 2704 .flags = GENL_ADMIN_PERM, 2705 }, 2706}; 2707 2708static const struct genl_multicast_group team_nl_mcgrps[] = { 2709 { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, }, 2710}; 2711 2712static int team_nl_send_multicast(struct sk_buff *skb, 2713 struct team *team, u32 portid) 2714{ 2715 return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev), 2716 skb, 0, 0, GFP_KERNEL); 2717} 2718 2719static int team_nl_send_event_options_get(struct team *team, 2720 struct list_head *sel_opt_inst_list) 2721{ 2722 return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast, 2723 sel_opt_inst_list); 2724} 2725 2726static int team_nl_send_event_port_get(struct team *team, 2727 struct team_port *port) 2728{ 2729 return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast, 2730 port); 2731} 2732 2733static int team_nl_init(void) 2734{ 2735 return genl_register_family_with_ops_groups(&team_nl_family, team_nl_ops, 2736 team_nl_mcgrps); 2737} 2738 2739static void team_nl_fini(void) 2740{ 2741 genl_unregister_family(&team_nl_family); 2742} 2743 2744 2745/****************** 2746 * Change checkers 2747 ******************/ 2748 2749static void __team_options_change_check(struct team *team) 2750{ 2751 int err; 2752 struct team_option_inst *opt_inst; 2753 LIST_HEAD(sel_opt_inst_list); 2754 2755 list_for_each_entry(opt_inst, &team->option_inst_list, list) { 2756 if (opt_inst->changed) 2757 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list); 2758 } 2759 err = team_nl_send_event_options_get(team, &sel_opt_inst_list); 2760 if (err && err != -ESRCH) 2761 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n", 2762 err); 2763} 2764 2765/* rtnl lock is held */ 2766 2767static void __team_port_change_send(struct team_port *port, bool linkup) 2768{ 2769 int err; 2770 2771 port->changed = true; 2772 port->state.linkup = linkup; 2773 team_refresh_port_linkup(port); 2774 if (linkup) { 2775 struct ethtool_cmd ecmd; 2776 2777 err = __ethtool_get_settings(port->dev, &ecmd); 2778 if (!err) { 2779 port->state.speed = ethtool_cmd_speed(&ecmd); 2780 port->state.duplex = ecmd.duplex; 2781 goto send_event; 2782 } 2783 } 2784 port->state.speed = 0; 2785 port->state.duplex = 0; 2786 2787send_event: 2788 err = team_nl_send_event_port_get(port->team, port); 2789 if (err && err != -ESRCH) 2790 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n", 2791 port->dev->name, err); 2792 2793} 2794 2795static void __team_carrier_check(struct team *team) 2796{ 2797 struct team_port *port; 2798 bool team_linkup; 2799 2800 if (team->user_carrier_enabled) 2801 return; 2802 2803 team_linkup = false; 2804 list_for_each_entry(port, &team->port_list, list) { 2805 if (port->linkup) { 2806 team_linkup = true; 2807 break; 2808 } 2809 } 2810 2811 if (team_linkup) 2812 netif_carrier_on(team->dev); 2813 else 2814 netif_carrier_off(team->dev); 2815} 2816 2817static void __team_port_change_check(struct team_port *port, bool linkup) 2818{ 2819 if (port->state.linkup != linkup) 2820 __team_port_change_send(port, linkup); 2821 __team_carrier_check(port->team); 2822} 2823 2824static void __team_port_change_port_added(struct team_port *port, bool linkup) 2825{ 2826 __team_port_change_send(port, linkup); 2827 __team_carrier_check(port->team); 2828} 2829 2830static void __team_port_change_port_removed(struct team_port *port) 2831{ 2832 port->removed = true; 2833 __team_port_change_send(port, false); 2834 __team_carrier_check(port->team); 2835} 2836 2837static void team_port_change_check(struct team_port *port, bool linkup) 2838{ 2839 struct team *team = port->team; 2840 2841 mutex_lock(&team->lock); 2842 __team_port_change_check(port, linkup); 2843 mutex_unlock(&team->lock); 2844} 2845 2846 2847/************************************ 2848 * Net device notifier event handler 2849 ************************************/ 2850 2851static int team_device_event(struct notifier_block *unused, 2852 unsigned long event, void *ptr) 2853{ 2854 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 2855 struct team_port *port; 2856 2857 port = team_port_get_rtnl(dev); 2858 if (!port) 2859 return NOTIFY_DONE; 2860 2861 switch (event) { 2862 case NETDEV_UP: 2863 if (netif_carrier_ok(dev)) 2864 team_port_change_check(port, true); 2865 break; 2866 case NETDEV_DOWN: 2867 team_port_change_check(port, false); 2868 break; 2869 case NETDEV_CHANGE: 2870 if (netif_running(port->dev)) 2871 team_port_change_check(port, 2872 !!netif_carrier_ok(port->dev)); 2873 break; 2874 case NETDEV_UNREGISTER: 2875 team_del_slave(port->team->dev, dev); 2876 break; 2877 case NETDEV_FEAT_CHANGE: 2878 team_compute_features(port->team); 2879 break; 2880 case NETDEV_PRECHANGEMTU: 2881 /* Forbid to change mtu of underlaying device */ 2882 if (!port->team->port_mtu_change_allowed) 2883 return NOTIFY_BAD; 2884 break; 2885 case NETDEV_PRE_TYPE_CHANGE: 2886 /* Forbid to change type of underlaying device */ 2887 return NOTIFY_BAD; 2888 case NETDEV_RESEND_IGMP: 2889 /* Propagate to master device */ 2890 call_netdevice_notifiers(event, port->team->dev); 2891 break; 2892 } 2893 return NOTIFY_DONE; 2894} 2895 2896static struct notifier_block team_notifier_block __read_mostly = { 2897 .notifier_call = team_device_event, 2898}; 2899 2900 2901/*********************** 2902 * Module init and exit 2903 ***********************/ 2904 2905static int __init team_module_init(void) 2906{ 2907 int err; 2908 2909 register_netdevice_notifier(&team_notifier_block); 2910 2911 err = rtnl_link_register(&team_link_ops); 2912 if (err) 2913 goto err_rtnl_reg; 2914 2915 err = team_nl_init(); 2916 if (err) 2917 goto err_nl_init; 2918 2919 return 0; 2920 2921err_nl_init: 2922 rtnl_link_unregister(&team_link_ops); 2923 2924err_rtnl_reg: 2925 unregister_netdevice_notifier(&team_notifier_block); 2926 2927 return err; 2928} 2929 2930static void __exit team_module_exit(void) 2931{ 2932 team_nl_fini(); 2933 rtnl_link_unregister(&team_link_ops); 2934 unregister_netdevice_notifier(&team_notifier_block); 2935} 2936 2937module_init(team_module_init); 2938module_exit(team_module_exit); 2939 2940MODULE_LICENSE("GPL v2"); 2941MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>"); 2942MODULE_DESCRIPTION("Ethernet team device driver"); 2943MODULE_ALIAS_RTNL_LINK(DRV_NAME); 2944