drivers/net/team/team.c

   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
  44 static struct team_port *team_port_get_rcu(const struct net_device *dev)
  45 {
  46         return rcu_dereference(dev->rx_handler_data);
  47 }
  48
  49 static 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  */
  60 static 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
  70 static 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
  75 static 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
  81 int team_modeop_port_enter(struct team *team, struct team_port *port)
  82 {
  83         return team_port_set_team_dev_addr(team, port);
  84 }
  85 EXPORT_SYMBOL(team_modeop_port_enter);
  86
  87 void 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 }
  92 EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
  93
  94 static void team_lower_state_changed(struct team_port *port)
  95 {
  96         struct netdev_lag_lower_state_info info;
  97
  98         info.link_up = port->linkup;
  99         info.tx_enabled = team_port_enabled(port);
 100         netdev_lower_state_changed(port->dev, &info);
 101 }
 102
 103 static void team_refresh_port_linkup(struct team_port *port)
 104 {
 105         bool new_linkup = port->user.linkup_enabled ? port->user.linkup :
 106                                                       port->state.linkup;
 107
 108         if (port->linkup != new_linkup) {
 109                 port->linkup = new_linkup;
 110                 team_lower_state_changed(port);
 111         }
 112 }
 113
 114
 115 /*******************
 116  * Options handling
 117  *******************/
 118
 119 struct team_option_inst { /* One for each option instance */
 120         struct list_head list;
 121         struct list_head tmp_list;
 122         struct team_option *option;
 123         struct team_option_inst_info info;
 124         bool changed;
 125         bool removed;
 126 };
 127
 128 static struct team_option *__team_find_option(struct team *team,
 129                                               const char *opt_name)
 130 {
 131         struct team_option *option;
 132
 133         list_for_each_entry(option, &team->option_list, list) {
 134                 if (strcmp(option->name, opt_name) == 0)
 135                         return option;
 136         }
 137         return NULL;
 138 }
 139
 140 static void __team_option_inst_del(struct team_option_inst *opt_inst)
 141 {
 142         list_del(&opt_inst->list);
 143         kfree(opt_inst);
 144 }
 145
 146 static void __team_option_inst_del_option(struct team *team,
 147                                           struct team_option *option)
 148 {
 149         struct team_option_inst *opt_inst, *tmp;
 150
 151         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 152                 if (opt_inst->option == option)
 153                         __team_option_inst_del(opt_inst);
 154         }
 155 }
 156
 157 static int __team_option_inst_add(struct team *team, struct team_option *option,
 158                                   struct team_port *port)
 159 {
 160         struct team_option_inst *opt_inst;
 161         unsigned int array_size;
 162         unsigned int i;
 163         int err;
 164
 165         array_size = option->array_size;
 166         if (!array_size)
 167                 array_size = 1; /* No array but still need one instance */
 168
 169         for (i = 0; i < array_size; i++) {
 170                 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
 171                 if (!opt_inst)
 172                         return -ENOMEM;
 173                 opt_inst->option = option;
 174                 opt_inst->info.port = port;
 175                 opt_inst->info.array_index = i;
 176                 opt_inst->changed = true;
 177                 opt_inst->removed = false;
 178                 list_add_tail(&opt_inst->list, &team->option_inst_list);
 179                 if (option->init) {
 180                         err = option->init(team, &opt_inst->info);
 181                         if (err)
 182                                 return err;
 183                 }
 184
 185         }
 186         return 0;
 187 }
 188
 189 static int __team_option_inst_add_option(struct team *team,
 190                                          struct team_option *option)
 191 {
 192         int err;
 193
 194         if (!option->per_port) {
 195                 err = __team_option_inst_add(team, option, NULL);
 196                 if (err)
 197                         goto inst_del_option;
 198         }
 199         return 0;
 200
 201 inst_del_option:
 202         __team_option_inst_del_option(team, option);
 203         return err;
 204 }
 205
 206 static void __team_option_inst_mark_removed_option(struct team *team,
 207                                                    struct team_option *option)
 208 {
 209         struct team_option_inst *opt_inst;
 210
 211         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 212                 if (opt_inst->option == option) {
 213                         opt_inst->changed = true;
 214                         opt_inst->removed = true;
 215                 }
 216         }
 217 }
 218
 219 static void __team_option_inst_del_port(struct team *team,
 220                                         struct team_port *port)
 221 {
 222         struct team_option_inst *opt_inst, *tmp;
 223
 224         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 225                 if (opt_inst->option->per_port &&
 226                     opt_inst->info.port == port)
 227                         __team_option_inst_del(opt_inst);
 228         }
 229 }
 230
 231 static int __team_option_inst_add_port(struct team *team,
 232                                        struct team_port *port)
 233 {
 234         struct team_option *option;
 235         int err;
 236
 237         list_for_each_entry(option, &team->option_list, list) {
 238                 if (!option->per_port)
 239                         continue;
 240                 err = __team_option_inst_add(team, option, port);
 241                 if (err)
 242                         goto inst_del_port;
 243         }
 244         return 0;
 245
 246 inst_del_port:
 247         __team_option_inst_del_port(team, port);
 248         return err;
 249 }
 250
 251 static void __team_option_inst_mark_removed_port(struct team *team,
 252                                                  struct team_port *port)
 253 {
 254         struct team_option_inst *opt_inst;
 255
 256         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 257                 if (opt_inst->info.port == port) {
 258                         opt_inst->changed = true;
 259                         opt_inst->removed = true;
 260                 }
 261         }
 262 }
 263
 264 static int __team_options_register(struct team *team,
 265                                    const struct team_option *option,
 266                                    size_t option_count)
 267 {
 268         int i;
 269         struct team_option **dst_opts;
 270         int err;
 271
 272         dst_opts = kzalloc(sizeof(struct team_option *) * option_count,
 273                            GFP_KERNEL);
 274         if (!dst_opts)
 275                 return -ENOMEM;
 276         for (i = 0; i < option_count; i++, option++) {
 277                 if (__team_find_option(team, option->name)) {
 278                         err = -EEXIST;
 279                         goto alloc_rollback;
 280                 }
 281                 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
 282                 if (!dst_opts[i]) {
 283                         err = -ENOMEM;
 284                         goto alloc_rollback;
 285                 }
 286         }
 287
 288         for (i = 0; i < option_count; i++) {
 289                 err = __team_option_inst_add_option(team, dst_opts[i]);
 290                 if (err)
 291                         goto inst_rollback;
 292                 list_add_tail(&dst_opts[i]->list, &team->option_list);
 293         }
 294
 295         kfree(dst_opts);
 296         return 0;
 297
 298 inst_rollback:
 299         for (i--; i >= 0; i--)
 300                 __team_option_inst_del_option(team, dst_opts[i]);
 301
 302         i = option_count - 1;
 303 alloc_rollback:
 304         for (i--; i >= 0; i--)
 305                 kfree(dst_opts[i]);
 306
 307         kfree(dst_opts);
 308         return err;
 309 }
 310
 311 static void __team_options_mark_removed(struct team *team,
 312                                         const struct team_option *option,
 313                                         size_t option_count)
 314 {
 315         int i;
 316
 317         for (i = 0; i < option_count; i++, option++) {
 318                 struct team_option *del_opt;
 319
 320                 del_opt = __team_find_option(team, option->name);
 321                 if (del_opt)
 322                         __team_option_inst_mark_removed_option(team, del_opt);
 323         }
 324 }
 325
 326 static void __team_options_unregister(struct team *team,
 327                                       const struct team_option *option,
 328                                       size_t option_count)
 329 {
 330         int i;
 331
 332         for (i = 0; i < option_count; i++, option++) {
 333                 struct team_option *del_opt;
 334
 335                 del_opt = __team_find_option(team, option->name);
 336                 if (del_opt) {
 337                         __team_option_inst_del_option(team, del_opt);
 338                         list_del(&del_opt->list);
 339                         kfree(del_opt);
 340                 }
 341         }
 342 }
 343
 344 static void __team_options_change_check(struct team *team);
 345
 346 int team_options_register(struct team *team,
 347                           const struct team_option *option,
 348                           size_t option_count)
 349 {
 350         int err;
 351
 352         err = __team_options_register(team, option, option_count);
 353         if (err)
 354                 return err;
 355         __team_options_change_check(team);
 356         return 0;
 357 }
 358 EXPORT_SYMBOL(team_options_register);
 359
 360 void team_options_unregister(struct team *team,
 361                              const struct team_option *option,
 362                              size_t option_count)
 363 {
 364         __team_options_mark_removed(team, option, option_count);
 365         __team_options_change_check(team);
 366         __team_options_unregister(team, option, option_count);
 367 }
 368 EXPORT_SYMBOL(team_options_unregister);
 369
 370 static int team_option_get(struct team *team,
 371                            struct team_option_inst *opt_inst,
 372                            struct team_gsetter_ctx *ctx)
 373 {
 374         if (!opt_inst->option->getter)
 375                 return -EOPNOTSUPP;
 376         return opt_inst->option->getter(team, ctx);
 377 }
 378
 379 static int team_option_set(struct team *team,
 380                            struct team_option_inst *opt_inst,
 381                            struct team_gsetter_ctx *ctx)
 382 {
 383         if (!opt_inst->option->setter)
 384                 return -EOPNOTSUPP;
 385         return opt_inst->option->setter(team, ctx);
 386 }
 387
 388 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
 389 {
 390         struct team_option_inst *opt_inst;
 391
 392         opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
 393         opt_inst->changed = true;
 394 }
 395 EXPORT_SYMBOL(team_option_inst_set_change);
 396
 397 void team_options_change_check(struct team *team)
 398 {
 399         __team_options_change_check(team);
 400 }
 401 EXPORT_SYMBOL(team_options_change_check);
 402
 403
 404 /****************
 405  * Mode handling
 406  ****************/
 407
 408 static LIST_HEAD(mode_list);
 409 static DEFINE_SPINLOCK(mode_list_lock);
 410
 411 struct team_mode_item {
 412         struct list_head list;
 413         const struct team_mode *mode;
 414 };
 415
 416 static struct team_mode_item *__find_mode(const char *kind)
 417 {
 418         struct team_mode_item *mitem;
 419
 420         list_for_each_entry(mitem, &mode_list, list) {
 421                 if (strcmp(mitem->mode->kind, kind) == 0)
 422                         return mitem;
 423         }
 424         return NULL;
 425 }
 426
 427 static bool is_good_mode_name(const char *name)
 428 {
 429         while (*name != '\0') {
 430                 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
 431                         return false;
 432                 name++;
 433         }
 434         return true;
 435 }
 436
 437 int team_mode_register(const struct team_mode *mode)
 438 {
 439         int err = 0;
 440         struct team_mode_item *mitem;
 441
 442         if (!is_good_mode_name(mode->kind) ||
 443             mode->priv_size > TEAM_MODE_PRIV_SIZE)
 444                 return -EINVAL;
 445
 446         mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
 447         if (!mitem)
 448                 return -ENOMEM;
 449
 450         spin_lock(&mode_list_lock);
 451         if (__find_mode(mode->kind)) {
 452                 err = -EEXIST;
 453                 kfree(mitem);
 454                 goto unlock;
 455         }
 456         mitem->mode = mode;
 457         list_add_tail(&mitem->list, &mode_list);
 458 unlock:
 459         spin_unlock(&mode_list_lock);
 460         return err;
 461 }
 462 EXPORT_SYMBOL(team_mode_register);
 463
 464 void team_mode_unregister(const struct team_mode *mode)
 465 {
 466         struct team_mode_item *mitem;
 467
 468         spin_lock(&mode_list_lock);
 469         mitem = __find_mode(mode->kind);
 470         if (mitem) {
 471                 list_del_init(&mitem->list);
 472                 kfree(mitem);
 473         }
 474         spin_unlock(&mode_list_lock);
 475 }
 476 EXPORT_SYMBOL(team_mode_unregister);
 477
 478 static const struct team_mode *team_mode_get(const char *kind)
 479 {
 480         struct team_mode_item *mitem;
 481         const struct team_mode *mode = NULL;
 482
 483         spin_lock(&mode_list_lock);
 484         mitem = __find_mode(kind);
 485         if (!mitem) {
 486                 spin_unlock(&mode_list_lock);
 487                 request_module("team-mode-%s", kind);
 488                 spin_lock(&mode_list_lock);
 489                 mitem = __find_mode(kind);
 490         }
 491         if (mitem) {
 492                 mode = mitem->mode;
 493                 if (!try_module_get(mode->owner))
 494                         mode = NULL;
 495         }
 496
 497         spin_unlock(&mode_list_lock);
 498         return mode;
 499 }
 500
 501 static void team_mode_put(const struct team_mode *mode)
 502 {
 503         module_put(mode->owner);
 504 }
 505
 506 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
 507 {
 508         dev_kfree_skb_any(skb);
 509         return false;
 510 }
 511
 512 static rx_handler_result_t team_dummy_receive(struct team *team,
 513                                               struct team_port *port,
 514                                               struct sk_buff *skb)
 515 {
 516         return RX_HANDLER_ANOTHER;
 517 }
 518
 519 static const struct team_mode __team_no_mode = {
 520         .kind           = "*NOMODE*",
 521 };
 522
 523 static bool team_is_mode_set(struct team *team)
 524 {
 525         return team->mode != &__team_no_mode;
 526 }
 527
 528 static void team_set_no_mode(struct team *team)
 529 {
 530         team->user_carrier_enabled = false;
 531         team->mode = &__team_no_mode;
 532 }
 533
 534 static void team_adjust_ops(struct team *team)
 535 {
 536         /*
 537          * To avoid checks in rx/tx skb paths, ensure here that non-null and
 538          * correct ops are always set.
 539          */
 540
 541         if (!team->en_port_count || !team_is_mode_set(team) ||
 542             !team->mode->ops->transmit)
 543                 team->ops.transmit = team_dummy_transmit;
 544         else
 545                 team->ops.transmit = team->mode->ops->transmit;
 546
 547         if (!team->en_port_count || !team_is_mode_set(team) ||
 548             !team->mode->ops->receive)
 549                 team->ops.receive = team_dummy_receive;
 550         else
 551                 team->ops.receive = team->mode->ops->receive;
 552 }
 553
 554 /*
 555  * We can benefit from the fact that it's ensured no port is present
 556  * at the time of mode change. Therefore no packets are in fly so there's no
 557  * need to set mode operations in any special way.
 558  */
 559 static int __team_change_mode(struct team *team,
 560                               const struct team_mode *new_mode)
 561 {
 562         /* Check if mode was previously set and do cleanup if so */
 563         if (team_is_mode_set(team)) {
 564                 void (*exit_op)(struct team *team) = team->ops.exit;
 565
 566                 /* Clear ops area so no callback is called any longer */
 567                 memset(&team->ops, 0, sizeof(struct team_mode_ops));
 568                 team_adjust_ops(team);
 569
 570                 if (exit_op)
 571                         exit_op(team);
 572                 team_mode_put(team->mode);
 573                 team_set_no_mode(team);
 574                 /* zero private data area */
 575                 memset(&team->mode_priv, 0,
 576                        sizeof(struct team) - offsetof(struct team, mode_priv));
 577         }
 578
 579         if (!new_mode)
 580                 return 0;
 581
 582         if (new_mode->ops->init) {
 583                 int err;
 584
 585                 err = new_mode->ops->init(team);
 586                 if (err)
 587                         return err;
 588         }
 589
 590         team->mode = new_mode;
 591         memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
 592         team_adjust_ops(team);
 593
 594         return 0;
 595 }
 596
 597 static int team_change_mode(struct team *team, const char *kind)
 598 {
 599         const struct team_mode *new_mode;
 600         struct net_device *dev = team->dev;
 601         int err;
 602
 603         if (!list_empty(&team->port_list)) {
 604                 netdev_err(dev, "No ports can be present during mode change\n");
 605                 return -EBUSY;
 606         }
 607
 608         if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
 609                 netdev_err(dev, "Unable to change to the same mode the team is in\n");
 610                 return -EINVAL;
 611         }
 612
 613         new_mode = team_mode_get(kind);
 614         if (!new_mode) {
 615                 netdev_err(dev, "Mode \"%s\" not found\n", kind);
 616                 return -EINVAL;
 617         }
 618
 619         err = __team_change_mode(team, new_mode);
 620         if (err) {
 621                 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
 622                 team_mode_put(new_mode);
 623                 return err;
 624         }
 625
 626         netdev_info(dev, "Mode changed to \"%s\"\n", kind);
 627         return 0;
 628 }
 629
 630
 631 /*********************
 632  * Peers notification
 633  *********************/
 634
 635 static void team_notify_peers_work(struct work_struct *work)
 636 {
 637         struct team *team;
 638         int val;
 639
 640         team = container_of(work, struct team, notify_peers.dw.work);
 641
 642         if (!rtnl_trylock()) {
 643                 schedule_delayed_work(&team->notify_peers.dw, 0);
 644                 return;
 645         }
 646         val = atomic_dec_if_positive(&team->notify_peers.count_pending);
 647         if (val < 0) {
 648                 rtnl_unlock();
 649                 return;
 650         }
 651         call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
 652         rtnl_unlock();
 653         if (val)
 654                 schedule_delayed_work(&team->notify_peers.dw,
 655                                       msecs_to_jiffies(team->notify_peers.interval));
 656 }
 657
 658 static void team_notify_peers(struct team *team)
 659 {
 660         if (!team->notify_peers.count || !netif_running(team->dev))
 661                 return;
 662         atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
 663         schedule_delayed_work(&team->notify_peers.dw, 0);
 664 }
 665
 666 static void team_notify_peers_init(struct team *team)
 667 {
 668         INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
 669 }
 670
 671 static void team_notify_peers_fini(struct team *team)
 672 {
 673         cancel_delayed_work_sync(&team->notify_peers.dw);
 674 }
 675
 676
 677 /*******************************
 678  * Send multicast group rejoins
 679  *******************************/
 680
 681 static void team_mcast_rejoin_work(struct work_struct *work)
 682 {
 683         struct team *team;
 684         int val;
 685
 686         team = container_of(work, struct team, mcast_rejoin.dw.work);
 687
 688         if (!rtnl_trylock()) {
 689                 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 690                 return;
 691         }
 692         val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending);
 693         if (val < 0) {
 694                 rtnl_unlock();
 695                 return;
 696         }
 697         call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
 698         rtnl_unlock();
 699         if (val)
 700                 schedule_delayed_work(&team->mcast_rejoin.dw,
 701                                       msecs_to_jiffies(team->mcast_rejoin.interval));
 702 }
 703
 704 static void team_mcast_rejoin(struct team *team)
 705 {
 706         if (!team->mcast_rejoin.count || !netif_running(team->dev))
 707                 return;
 708         atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
 709         schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 710 }
 711
 712 static void team_mcast_rejoin_init(struct team *team)
 713 {
 714         INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
 715 }
 716
 717 static void team_mcast_rejoin_fini(struct team *team)
 718 {
 719         cancel_delayed_work_sync(&team->mcast_rejoin.dw);
 720 }
 721
 722
 723 /************************
 724  * Rx path frame handler
 725  ************************/
 726
 727 /* note: already called with rcu_read_lock */
 728 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
 729 {
 730         struct sk_buff *skb = *pskb;
 731         struct team_port *port;
 732         struct team *team;
 733         rx_handler_result_t res;
 734
 735         skb = skb_share_check(skb, GFP_ATOMIC);
 736         if (!skb)
 737                 return RX_HANDLER_CONSUMED;
 738
 739         *pskb = skb;
 740
 741         port = team_port_get_rcu(skb->dev);
 742         team = port->team;
 743         if (!team_port_enabled(port)) {
 744                 /* allow exact match delivery for disabled ports */
 745                 res = RX_HANDLER_EXACT;
 746         } else {
 747                 res = team->ops.receive(team, port, skb);
 748         }
 749         if (res == RX_HANDLER_ANOTHER) {
 750                 struct team_pcpu_stats *pcpu_stats;
 751
 752                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
 753                 u64_stats_update_begin(&pcpu_stats->syncp);
 754                 pcpu_stats->rx_packets++;
 755                 pcpu_stats->rx_bytes += skb->len;
 756                 if (skb->pkt_type == PACKET_MULTICAST)
 757                         pcpu_stats->rx_multicast++;
 758                 u64_stats_update_end(&pcpu_stats->syncp);
 759
 760                 skb->dev = team->dev;
 761         } else if (res == RX_HANDLER_EXACT) {
 762                 this_cpu_inc(team->pcpu_stats->rx_nohandler);
 763         } else {
 764                 this_cpu_inc(team->pcpu_stats->rx_dropped);
 765         }
 766
 767         return res;
 768 }
 769
 770
 771 /*************************************
 772  * Multiqueue Tx port select override
 773  *************************************/
 774
 775 static int team_queue_override_init(struct team *team)
 776 {
 777         struct list_head *listarr;
 778         unsigned int queue_cnt = team->dev->num_tx_queues - 1;
 779         unsigned int i;
 780
 781         if (!queue_cnt)
 782                 return 0;
 783         listarr = kmalloc(sizeof(struct list_head) * queue_cnt, GFP_KERNEL);
 784         if (!listarr)
 785                 return -ENOMEM;
 786         team->qom_lists = listarr;
 787         for (i = 0; i < queue_cnt; i++)
 788                 INIT_LIST_HEAD(listarr++);
 789         return 0;
 790 }
 791
 792 static void team_queue_override_fini(struct team *team)
 793 {
 794         kfree(team->qom_lists);
 795 }
 796
 797 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
 798 {
 799         return &team->qom_lists[queue_id - 1];
 800 }
 801
 802 /*
 803  * note: already called with rcu_read_lock
 804  */
 805 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
 806 {
 807         struct list_head *qom_list;
 808         struct team_port *port;
 809
 810         if (!team->queue_override_enabled || !skb->queue_mapping)
 811                 return false;
 812         qom_list = __team_get_qom_list(team, skb->queue_mapping);
 813         list_for_each_entry_rcu(port, qom_list, qom_list) {
 814                 if (!team_dev_queue_xmit(team, port, skb))
 815                         return true;
 816         }
 817         return false;
 818 }
 819
 820 static void __team_queue_override_port_del(struct team *team,
 821                                            struct team_port *port)
 822 {
 823         if (!port->queue_id)
 824                 return;
 825         list_del_rcu(&port->qom_list);
 826 }
 827
 828 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
 829                                                       struct team_port *cur)
 830 {
 831         if (port->priority < cur->priority)
 832                 return true;
 833         if (port->priority > cur->priority)
 834                 return false;
 835         if (port->index < cur->index)
 836                 return true;
 837         return false;
 838 }
 839
 840 static void __team_queue_override_port_add(struct team *team,
 841                                            struct team_port *port)
 842 {
 843         struct team_port *cur;
 844         struct list_head *qom_list;
 845         struct list_head *node;
 846
 847         if (!port->queue_id)
 848                 return;
 849         qom_list = __team_get_qom_list(team, port->queue_id);
 850         node = qom_list;
 851         list_for_each_entry(cur, qom_list, qom_list) {
 852                 if (team_queue_override_port_has_gt_prio_than(port, cur))
 853                         break;
 854                 node = &cur->qom_list;
 855         }
 856         list_add_tail_rcu(&port->qom_list, node);
 857 }
 858
 859 static void __team_queue_override_enabled_check(struct team *team)
 860 {
 861         struct team_port *port;
 862         bool enabled = false;
 863
 864         list_for_each_entry(port, &team->port_list, list) {
 865                 if (port->queue_id) {
 866                         enabled = true;
 867                         break;
 868                 }
 869         }
 870         if (enabled == team->queue_override_enabled)
 871                 return;
 872         netdev_dbg(team->dev, "%s queue override\n",
 873                    enabled ? "Enabling" : "Disabling");
 874         team->queue_override_enabled = enabled;
 875 }
 876
 877 static void team_queue_override_port_prio_changed(struct team *team,
 878                                                   struct team_port *port)
 879 {
 880         if (!port->queue_id || team_port_enabled(port))
 881                 return;
 882         __team_queue_override_port_del(team, port);
 883         __team_queue_override_port_add(team, port);
 884         __team_queue_override_enabled_check(team);
 885 }
 886
 887 static void team_queue_override_port_change_queue_id(struct team *team,
 888                                                      struct team_port *port,
 889                                                      u16 new_queue_id)
 890 {
 891         if (team_port_enabled(port)) {
 892                 __team_queue_override_port_del(team, port);
 893                 port->queue_id = new_queue_id;
 894                 __team_queue_override_port_add(team, port);
 895                 __team_queue_override_enabled_check(team);
 896         } else {
 897                 port->queue_id = new_queue_id;
 898         }
 899 }
 900
 901 static void team_queue_override_port_add(struct team *team,
 902                                          struct team_port *port)
 903 {
 904         __team_queue_override_port_add(team, port);
 905         __team_queue_override_enabled_check(team);
 906 }
 907
 908 static void team_queue_override_port_del(struct team *team,
 909                                          struct team_port *port)
 910 {
 911         __team_queue_override_port_del(team, port);
 912         __team_queue_override_enabled_check(team);
 913 }
 914
 915
 916 /****************
 917  * Port handling
 918  ****************/
 919
 920 static bool team_port_find(const struct team *team,
 921                            const struct team_port *port)
 922 {
 923         struct team_port *cur;
 924
 925         list_for_each_entry(cur, &team->port_list, list)
 926                 if (cur == port)
 927                         return true;
 928         return false;
 929 }
 930
 931 /*
 932  * Enable/disable port by adding to enabled port hashlist and setting
 933  * port->index (Might be racy so reader could see incorrect ifindex when
 934  * processing a flying packet, but that is not a problem). Write guarded
 935  * by team->lock.
 936  */
 937 static void team_port_enable(struct team *team,
 938                              struct team_port *port)
 939 {
 940         if (team_port_enabled(port))
 941                 return;
 942         port->index = team->en_port_count++;
 943         hlist_add_head_rcu(&port->hlist,
 944                            team_port_index_hash(team, port->index));
 945         team_adjust_ops(team);
 946         team_queue_override_port_add(team, port);
 947         if (team->ops.port_enabled)
 948                 team->ops.port_enabled(team, port);
 949         team_notify_peers(team);
 950         team_mcast_rejoin(team);
 951         team_lower_state_changed(port);
 952 }
 953
 954 static void __reconstruct_port_hlist(struct team *team, int rm_index)
 955 {
 956         int i;
 957         struct team_port *port;
 958
 959         for (i = rm_index + 1; i < team->en_port_count; i++) {
 960                 port = team_get_port_by_index(team, i);
 961                 hlist_del_rcu(&port->hlist);
 962                 port->index--;
 963                 hlist_add_head_rcu(&port->hlist,
 964                                    team_port_index_hash(team, port->index));
 965         }
 966 }
 967
 968 static void team_port_disable(struct team *team,
 969                               struct team_port *port)
 970 {
 971         if (!team_port_enabled(port))
 972                 return;
 973         if (team->ops.port_disabled)
 974                 team->ops.port_disabled(team, port);
 975         hlist_del_rcu(&port->hlist);
 976         __reconstruct_port_hlist(team, port->index);
 977         port->index = -1;
 978         team->en_port_count--;
 979         team_queue_override_port_del(team, port);
 980         team_adjust_ops(team);
 981         team_notify_peers(team);
 982         team_mcast_rejoin(team);
 983         team_lower_state_changed(port);
 984 }
 985
 986 #define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
 987                             NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
 988                             NETIF_F_HIGHDMA | NETIF_F_LRO)
 989
 990 #define TEAM_ENC_FEATURES       (NETIF_F_HW_CSUM | NETIF_F_SG | \
 991                                  NETIF_F_RXCSUM | NETIF_F_ALL_TSO)
 992
 993 static void __team_compute_features(struct team *team)
 994 {
 995         struct team_port *port;
 996         u32 vlan_features = TEAM_VLAN_FEATURES & NETIF_F_ALL_FOR_ALL;
 997         netdev_features_t enc_features  = TEAM_ENC_FEATURES;
 998         unsigned short max_hard_header_len = ETH_HLEN;
 999         unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
1000                                         IFF_XMIT_DST_RELEASE_PERM;
1001
1002         list_for_each_entry(port, &team->port_list, list) {
1003                 vlan_features = netdev_increment_features(vlan_features,
1004                                         port->dev->vlan_features,
1005                                         TEAM_VLAN_FEATURES);
1006                 enc_features =
1007                         netdev_increment_features(enc_features,
1008                                                   port->dev->hw_enc_features,
1009                                                   TEAM_ENC_FEATURES);
1010
1011
1012                 dst_release_flag &= port->dev->priv_flags;
1013                 if (port->dev->hard_header_len > max_hard_header_len)
1014                         max_hard_header_len = port->dev->hard_header_len;
1015         }
1016
1017         team->dev->vlan_features = vlan_features;
1018         team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL;
1019         team->dev->hard_header_len = max_hard_header_len;
1020
1021         team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1022         if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1023                 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1024
1025         netdev_change_features(team->dev);
1026 }
1027
1028 static void team_compute_features(struct team *team)
1029 {
1030         mutex_lock(&team->lock);
1031         __team_compute_features(team);
1032         mutex_unlock(&team->lock);
1033 }
1034
1035 static int team_port_enter(struct team *team, struct team_port *port)
1036 {
1037         int err = 0;
1038
1039         dev_hold(team->dev);
1040         if (team->ops.port_enter) {
1041                 err = team->ops.port_enter(team, port);
1042                 if (err) {
1043                         netdev_err(team->dev, "Device %s failed to enter team mode\n",
1044                                    port->dev->name);
1045                         goto err_port_enter;
1046                 }
1047         }
1048
1049         return 0;
1050
1051 err_port_enter:
1052         dev_put(team->dev);
1053
1054         return err;
1055 }
1056
1057 static void team_port_leave(struct team *team, struct team_port *port)
1058 {
1059         if (team->ops.port_leave)
1060                 team->ops.port_leave(team, port);
1061         dev_put(team->dev);
1062 }
1063
1064 #ifdef CONFIG_NET_POLL_CONTROLLER
1065 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1066 {
1067         struct netpoll *np;
1068         int err;
1069
1070         if (!team->dev->npinfo)
1071                 return 0;
1072
1073         np = kzalloc(sizeof(*np), GFP_KERNEL);
1074         if (!np)
1075                 return -ENOMEM;
1076
1077         err = __netpoll_setup(np, port->dev);
1078         if (err) {
1079                 kfree(np);
1080                 return err;
1081         }
1082         port->np = np;
1083         return err;
1084 }
1085
1086 static void team_port_disable_netpoll(struct team_port *port)
1087 {
1088         struct netpoll *np = port->np;
1089
1090         if (!np)
1091                 return;
1092         port->np = NULL;
1093
1094         /* Wait for transmitting packets to finish before freeing. */
1095         synchronize_rcu_bh();
1096         __netpoll_cleanup(np);
1097         kfree(np);
1098 }
1099 #else
1100 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1101 {
1102         return 0;
1103 }
1104 static void team_port_disable_netpoll(struct team_port *port)
1105 {
1106 }
1107 #endif
1108
1109 static int team_upper_dev_link(struct team *team, struct team_port *port)
1110 {
1111         struct netdev_lag_upper_info lag_upper_info;
1112         int err;
1113
1114         lag_upper_info.tx_type = team->mode->lag_tx_type;
1115         err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1116                                            &lag_upper_info);
1117         if (err)
1118                 return err;
1119         port->dev->priv_flags |= IFF_TEAM_PORT;
1120         return 0;
1121 }
1122
1123 static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1124 {
1125         netdev_upper_dev_unlink(port->dev, team->dev);
1126         port->dev->priv_flags &= ~IFF_TEAM_PORT;
1127 }
1128
1129 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1130 static int team_dev_type_check_change(struct net_device *dev,
1131                                       struct net_device *port_dev);
1132
1133 static int team_port_add(struct team *team, struct net_device *port_dev)
1134 {
1135         struct net_device *dev = team->dev;
1136         struct team_port *port;
1137         char *portname = port_dev->name;
1138         int err;
1139
1140         if (port_dev->flags & IFF_LOOPBACK) {
1141                 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1142                            portname);
1143                 return -EINVAL;
1144         }
1145
1146         if (team_port_exists(port_dev)) {
1147                 netdev_err(dev, "Device %s is already a port "
1148                                 "of a team device\n", portname);
1149                 return -EBUSY;
1150         }
1151
1152         if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1153             vlan_uses_dev(dev)) {
1154                 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1155                            portname);
1156                 return -EPERM;
1157         }
1158
1159         err = team_dev_type_check_change(dev, port_dev);
1160         if (err)
1161                 return err;
1162
1163         if (port_dev->flags & IFF_UP) {
1164                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1165                            portname);
1166                 return -EBUSY;
1167         }
1168
1169         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1170                        GFP_KERNEL);
1171         if (!port)
1172                 return -ENOMEM;
1173
1174         port->dev = port_dev;
1175         port->team = team;
1176         INIT_LIST_HEAD(&port->qom_list);
1177
1178         port->orig.mtu = port_dev->mtu;
1179         err = dev_set_mtu(port_dev, dev->mtu);
1180         if (err) {
1181                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1182                 goto err_set_mtu;
1183         }
1184
1185         memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1186
1187         err = team_port_enter(team, port);
1188         if (err) {
1189                 netdev_err(dev, "Device %s failed to enter team mode\n",
1190                            portname);
1191                 goto err_port_enter;
1192         }
1193
1194         err = dev_open(port_dev);
1195         if (err) {
1196                 netdev_dbg(dev, "Device %s opening failed\n",
1197                            portname);
1198                 goto err_dev_open;
1199         }
1200
1201         err = vlan_vids_add_by_dev(port_dev, dev);
1202         if (err) {
1203                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1204                                 portname);
1205                 goto err_vids_add;
1206         }
1207
1208         err = team_port_enable_netpoll(team, port);
1209         if (err) {
1210                 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1211                            portname);
1212                 goto err_enable_netpoll;
1213         }
1214
1215         if (!(dev->features & NETIF_F_LRO))
1216                 dev_disable_lro(port_dev);
1217
1218         err = netdev_rx_handler_register(port_dev, team_handle_frame,
1219                                          port);
1220         if (err) {
1221                 netdev_err(dev, "Device %s failed to register rx_handler\n",
1222                            portname);
1223                 goto err_handler_register;
1224         }
1225
1226         err = team_upper_dev_link(team, port);
1227         if (err) {
1228                 netdev_err(dev, "Device %s failed to set upper link\n",
1229                            portname);
1230                 goto err_set_upper_link;
1231         }
1232
1233         err = __team_option_inst_add_port(team, port);
1234         if (err) {
1235                 netdev_err(dev, "Device %s failed to add per-port options\n",
1236                            portname);
1237                 goto err_option_port_add;
1238         }
1239
1240         port->index = -1;
1241         list_add_tail_rcu(&port->list, &team->port_list);
1242         team_port_enable(team, port);
1243         __team_compute_features(team);
1244         __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1245         __team_options_change_check(team);
1246
1247         netdev_info(dev, "Port device %s added\n", portname);
1248
1249         return 0;
1250
1251 err_option_port_add:
1252         team_upper_dev_unlink(team, port);
1253
1254 err_set_upper_link:
1255         netdev_rx_handler_unregister(port_dev);
1256
1257 err_handler_register:
1258         team_port_disable_netpoll(port);
1259
1260 err_enable_netpoll:
1261         vlan_vids_del_by_dev(port_dev, dev);
1262
1263 err_vids_add:
1264         dev_close(port_dev);
1265
1266 err_dev_open:
1267         team_port_leave(team, port);
1268         team_port_set_orig_dev_addr(port);
1269
1270 err_port_enter:
1271         dev_set_mtu(port_dev, port->orig.mtu);
1272
1273 err_set_mtu:
1274         kfree(port);
1275
1276         return err;
1277 }
1278
1279 static void __team_port_change_port_removed(struct team_port *port);
1280
1281 static int team_port_del(struct team *team, struct net_device *port_dev)
1282 {
1283         struct net_device *dev = team->dev;
1284         struct team_port *port;
1285         char *portname = port_dev->name;
1286
1287         port = team_port_get_rtnl(port_dev);
1288         if (!port || !team_port_find(team, port)) {
1289                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1290                            portname);
1291                 return -ENOENT;
1292         }
1293
1294         team_port_disable(team, port);
1295         list_del_rcu(&port->list);
1296         team_upper_dev_unlink(team, port);
1297         netdev_rx_handler_unregister(port_dev);
1298         team_port_disable_netpoll(port);
1299         vlan_vids_del_by_dev(port_dev, dev);
1300         dev_uc_unsync(port_dev, dev);
1301         dev_mc_unsync(port_dev, dev);
1302         dev_close(port_dev);
1303         team_port_leave(team, port);
1304
1305         __team_option_inst_mark_removed_port(team, port);
1306         __team_options_change_check(team);
1307         __team_option_inst_del_port(team, port);
1308         __team_port_change_port_removed(port);
1309
1310         team_port_set_orig_dev_addr(port);
1311         dev_set_mtu(port_dev, port->orig.mtu);
1312         kfree_rcu(port, rcu);
1313         netdev_info(dev, "Port device %s removed\n", portname);
1314         __team_compute_features(team);
1315
1316         return 0;
1317 }
1318
1319
1320 /*****************
1321  * Net device ops
1322  *****************/
1323
1324 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1325 {
1326         ctx->data.str_val = team->mode->kind;
1327         return 0;
1328 }
1329
1330 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1331 {
1332         return team_change_mode(team, ctx->data.str_val);
1333 }
1334
1335 static int team_notify_peers_count_get(struct team *team,
1336                                        struct team_gsetter_ctx *ctx)
1337 {
1338         ctx->data.u32_val = team->notify_peers.count;
1339         return 0;
1340 }
1341
1342 static int team_notify_peers_count_set(struct team *team,
1343                                        struct team_gsetter_ctx *ctx)
1344 {
1345         team->notify_peers.count = ctx->data.u32_val;
1346         return 0;
1347 }
1348
1349 static int team_notify_peers_interval_get(struct team *team,
1350                                           struct team_gsetter_ctx *ctx)
1351 {
1352         ctx->data.u32_val = team->notify_peers.interval;
1353         return 0;
1354 }
1355
1356 static int team_notify_peers_interval_set(struct team *team,
1357                                           struct team_gsetter_ctx *ctx)
1358 {
1359         team->notify_peers.interval = ctx->data.u32_val;
1360         return 0;
1361 }
1362
1363 static int team_mcast_rejoin_count_get(struct team *team,
1364                                        struct team_gsetter_ctx *ctx)
1365 {
1366         ctx->data.u32_val = team->mcast_rejoin.count;
1367         return 0;
1368 }
1369
1370 static int team_mcast_rejoin_count_set(struct team *team,
1371                                        struct team_gsetter_ctx *ctx)
1372 {
1373         team->mcast_rejoin.count = ctx->data.u32_val;
1374         return 0;
1375 }
1376
1377 static int team_mcast_rejoin_interval_get(struct team *team,
1378                                           struct team_gsetter_ctx *ctx)
1379 {
1380         ctx->data.u32_val = team->mcast_rejoin.interval;
1381         return 0;
1382 }
1383
1384 static int team_mcast_rejoin_interval_set(struct team *team,
1385                                           struct team_gsetter_ctx *ctx)
1386 {
1387         team->mcast_rejoin.interval = ctx->data.u32_val;
1388         return 0;
1389 }
1390
1391 static int team_port_en_option_get(struct team *team,
1392                                    struct team_gsetter_ctx *ctx)
1393 {
1394         struct team_port *port = ctx->info->port;
1395
1396         ctx->data.bool_val = team_port_enabled(port);
1397         return 0;
1398 }
1399
1400 static int team_port_en_option_set(struct team *team,
1401                                    struct team_gsetter_ctx *ctx)
1402 {
1403         struct team_port *port = ctx->info->port;
1404
1405         if (ctx->data.bool_val)
1406                 team_port_enable(team, port);
1407         else
1408                 team_port_disable(team, port);
1409         return 0;
1410 }
1411
1412 static int team_user_linkup_option_get(struct team *team,
1413                                        struct team_gsetter_ctx *ctx)
1414 {
1415         struct team_port *port = ctx->info->port;
1416
1417         ctx->data.bool_val = port->user.linkup;
1418         return 0;
1419 }
1420
1421 static void __team_carrier_check(struct team *team);
1422
1423 static int team_user_linkup_option_set(struct team *team,
1424                                        struct team_gsetter_ctx *ctx)
1425 {
1426         struct team_port *port = ctx->info->port;
1427
1428         port->user.linkup = ctx->data.bool_val;
1429         team_refresh_port_linkup(port);
1430         __team_carrier_check(port->team);
1431         return 0;
1432 }
1433
1434 static int team_user_linkup_en_option_get(struct team *team,
1435                                           struct team_gsetter_ctx *ctx)
1436 {
1437         struct team_port *port = ctx->info->port;
1438
1439         ctx->data.bool_val = port->user.linkup_enabled;
1440         return 0;
1441 }
1442
1443 static int team_user_linkup_en_option_set(struct team *team,
1444                                           struct team_gsetter_ctx *ctx)
1445 {
1446         struct team_port *port = ctx->info->port;
1447
1448         port->user.linkup_enabled = ctx->data.bool_val;
1449         team_refresh_port_linkup(port);
1450         __team_carrier_check(port->team);
1451         return 0;
1452 }
1453
1454 static int team_priority_option_get(struct team *team,
1455                                     struct team_gsetter_ctx *ctx)
1456 {
1457         struct team_port *port = ctx->info->port;
1458
1459         ctx->data.s32_val = port->priority;
1460         return 0;
1461 }
1462
1463 static int team_priority_option_set(struct team *team,
1464                                     struct team_gsetter_ctx *ctx)
1465 {
1466         struct team_port *port = ctx->info->port;
1467         s32 priority = ctx->data.s32_val;
1468
1469         if (port->priority == priority)
1470                 return 0;
1471         port->priority = priority;
1472         team_queue_override_port_prio_changed(team, port);
1473         return 0;
1474 }
1475
1476 static int team_queue_id_option_get(struct team *team,
1477                                     struct team_gsetter_ctx *ctx)
1478 {
1479         struct team_port *port = ctx->info->port;
1480
1481         ctx->data.u32_val = port->queue_id;
1482         return 0;
1483 }
1484
1485 static int team_queue_id_option_set(struct team *team,
1486                                     struct team_gsetter_ctx *ctx)
1487 {
1488         struct team_port *port = ctx->info->port;
1489         u16 new_queue_id = ctx->data.u32_val;
1490
1491         if (port->queue_id == new_queue_id)
1492                 return 0;
1493         if (new_queue_id >= team->dev->real_num_tx_queues)
1494                 return -EINVAL;
1495         team_queue_override_port_change_queue_id(team, port, new_queue_id);
1496         return 0;
1497 }
1498
1499 static const struct team_option team_options[] = {
1500         {
1501                 .name = "mode",
1502                 .type = TEAM_OPTION_TYPE_STRING,
1503                 .getter = team_mode_option_get,
1504                 .setter = team_mode_option_set,
1505         },
1506         {
1507                 .name = "notify_peers_count",
1508                 .type = TEAM_OPTION_TYPE_U32,
1509                 .getter = team_notify_peers_count_get,
1510                 .setter = team_notify_peers_count_set,
1511         },
1512         {
1513                 .name = "notify_peers_interval",
1514                 .type = TEAM_OPTION_TYPE_U32,
1515                 .getter = team_notify_peers_interval_get,
1516                 .setter = team_notify_peers_interval_set,
1517         },
1518         {
1519                 .name = "mcast_rejoin_count",
1520                 .type = TEAM_OPTION_TYPE_U32,
1521                 .getter = team_mcast_rejoin_count_get,
1522                 .setter = team_mcast_rejoin_count_set,
1523         },
1524         {
1525                 .name = "mcast_rejoin_interval",
1526                 .type = TEAM_OPTION_TYPE_U32,
1527                 .getter = team_mcast_rejoin_interval_get,
1528                 .setter = team_mcast_rejoin_interval_set,
1529         },
1530         {
1531                 .name = "enabled",
1532                 .type = TEAM_OPTION_TYPE_BOOL,
1533                 .per_port = true,
1534                 .getter = team_port_en_option_get,
1535                 .setter = team_port_en_option_set,
1536         },
1537         {
1538                 .name = "user_linkup",
1539                 .type = TEAM_OPTION_TYPE_BOOL,
1540                 .per_port = true,
1541                 .getter = team_user_linkup_option_get,
1542                 .setter = team_user_linkup_option_set,
1543         },
1544         {
1545                 .name = "user_linkup_enabled",
1546                 .type = TEAM_OPTION_TYPE_BOOL,
1547                 .per_port = true,
1548                 .getter = team_user_linkup_en_option_get,
1549                 .setter = team_user_linkup_en_option_set,
1550         },
1551         {
1552                 .name = "priority",
1553                 .type = TEAM_OPTION_TYPE_S32,
1554                 .per_port = true,
1555                 .getter = team_priority_option_get,
1556                 .setter = team_priority_option_set,
1557         },
1558         {
1559                 .name = "queue_id",
1560                 .type = TEAM_OPTION_TYPE_U32,
1561                 .per_port = true,
1562                 .getter = team_queue_id_option_get,
1563                 .setter = team_queue_id_option_set,
1564         },
1565 };
1566
1567 static struct lock_class_key team_netdev_xmit_lock_key;
1568 static struct lock_class_key team_netdev_addr_lock_key;
1569 static struct lock_class_key team_tx_busylock_key;
1570
1571 static void team_set_lockdep_class_one(struct net_device *dev,
1572                                        struct netdev_queue *txq,
1573                                        void *unused)
1574 {
1575         lockdep_set_class(&txq->_xmit_lock, &team_netdev_xmit_lock_key);
1576 }
1577
1578 static void team_set_lockdep_class(struct net_device *dev)
1579 {
1580         lockdep_set_class(&dev->addr_list_lock, &team_netdev_addr_lock_key);
1581         netdev_for_each_tx_queue(dev, team_set_lockdep_class_one, NULL);
1582         dev->qdisc_tx_busylock = &team_tx_busylock_key;
1583 }
1584
1585 static int team_init(struct net_device *dev)
1586 {
1587         struct team *team = netdev_priv(dev);
1588         int i;
1589         int err;
1590
1591         team->dev = dev;
1592         mutex_init(&team->lock);
1593         team_set_no_mode(team);
1594
1595         team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1596         if (!team->pcpu_stats)
1597                 return -ENOMEM;
1598
1599         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1600                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1601         INIT_LIST_HEAD(&team->port_list);
1602         err = team_queue_override_init(team);
1603         if (err)
1604                 goto err_team_queue_override_init;
1605
1606         team_adjust_ops(team);
1607
1608         INIT_LIST_HEAD(&team->option_list);
1609         INIT_LIST_HEAD(&team->option_inst_list);
1610
1611         team_notify_peers_init(team);
1612         team_mcast_rejoin_init(team);
1613
1614         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1615         if (err)
1616                 goto err_options_register;
1617         netif_carrier_off(dev);
1618
1619         team_set_lockdep_class(dev);
1620
1621         return 0;
1622
1623 err_options_register:
1624         team_mcast_rejoin_fini(team);
1625         team_notify_peers_fini(team);
1626         team_queue_override_fini(team);
1627 err_team_queue_override_init:
1628         free_percpu(team->pcpu_stats);
1629
1630         return err;
1631 }
1632
1633 static void team_uninit(struct net_device *dev)
1634 {
1635         struct team *team = netdev_priv(dev);
1636         struct team_port *port;
1637         struct team_port *tmp;
1638
1639         mutex_lock(&team->lock);
1640         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1641                 team_port_del(team, port->dev);
1642
1643         __team_change_mode(team, NULL); /* cleanup */
1644         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1645         team_mcast_rejoin_fini(team);
1646         team_notify_peers_fini(team);
1647         team_queue_override_fini(team);
1648         mutex_unlock(&team->lock);
1649 }
1650
1651 static void team_destructor(struct net_device *dev)
1652 {
1653         struct team *team = netdev_priv(dev);
1654
1655         free_percpu(team->pcpu_stats);
1656         free_netdev(dev);
1657 }
1658
1659 static int team_open(struct net_device *dev)
1660 {
1661         return 0;
1662 }
1663
1664 static int team_close(struct net_device *dev)
1665 {
1666         return 0;
1667 }
1668
1669 /*
1670  * note: already called with rcu_read_lock
1671  */
1672 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1673 {
1674         struct team *team = netdev_priv(dev);
1675         bool tx_success;
1676         unsigned int len = skb->len;
1677
1678         tx_success = team_queue_override_transmit(team, skb);
1679         if (!tx_success)
1680                 tx_success = team->ops.transmit(team, skb);
1681         if (tx_success) {
1682                 struct team_pcpu_stats *pcpu_stats;
1683
1684                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1685                 u64_stats_update_begin(&pcpu_stats->syncp);
1686                 pcpu_stats->tx_packets++;
1687                 pcpu_stats->tx_bytes += len;
1688                 u64_stats_update_end(&pcpu_stats->syncp);
1689         } else {
1690                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1691         }
1692
1693         return NETDEV_TX_OK;
1694 }
1695
1696 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1697                              void *accel_priv, select_queue_fallback_t fallback)
1698 {
1699         /*
1700          * This helper function exists to help dev_pick_tx get the correct
1701          * destination queue.  Using a helper function skips a call to
1702          * skb_tx_hash and will put the skbs in the queue we expect on their
1703          * way down to the team driver.
1704          */
1705         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1706
1707         /*
1708          * Save the original txq to restore before passing to the driver
1709          */
1710         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1711
1712         if (unlikely(txq >= dev->real_num_tx_queues)) {
1713                 do {
1714                         txq -= dev->real_num_tx_queues;
1715                 } while (txq >= dev->real_num_tx_queues);
1716         }
1717         return txq;
1718 }
1719
1720 static void team_change_rx_flags(struct net_device *dev, int change)
1721 {
1722         struct team *team = netdev_priv(dev);
1723         struct team_port *port;
1724         int inc;
1725
1726         rcu_read_lock();
1727         list_for_each_entry_rcu(port, &team->port_list, list) {
1728                 if (change & IFF_PROMISC) {
1729                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1730                         dev_set_promiscuity(port->dev, inc);
1731                 }
1732                 if (change & IFF_ALLMULTI) {
1733                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1734                         dev_set_allmulti(port->dev, inc);
1735                 }
1736         }
1737         rcu_read_unlock();
1738 }
1739
1740 static void team_set_rx_mode(struct net_device *dev)
1741 {
1742         struct team *team = netdev_priv(dev);
1743         struct team_port *port;
1744
1745         rcu_read_lock();
1746         list_for_each_entry_rcu(port, &team->port_list, list) {
1747                 dev_uc_sync_multiple(port->dev, dev);
1748                 dev_mc_sync_multiple(port->dev, dev);
1749         }
1750         rcu_read_unlock();
1751 }
1752
1753 static int team_set_mac_address(struct net_device *dev, void *p)
1754 {
1755         struct sockaddr *addr = p;
1756         struct team *team = netdev_priv(dev);
1757         struct team_port *port;
1758
1759         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1760                 return -EADDRNOTAVAIL;
1761         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1762         mutex_lock(&team->lock);
1763         list_for_each_entry(port, &team->port_list, list)
1764                 if (team->ops.port_change_dev_addr)
1765                         team->ops.port_change_dev_addr(team, port);
1766         mutex_unlock(&team->lock);
1767         return 0;
1768 }
1769
1770 static int team_change_mtu(struct net_device *dev, int new_mtu)
1771 {
1772         struct team *team = netdev_priv(dev);
1773         struct team_port *port;
1774         int err;
1775
1776         /*
1777          * Alhough this is reader, it's guarded by team lock. It's not possible
1778          * to traverse list in reverse under rcu_read_lock
1779          */
1780         mutex_lock(&team->lock);
1781         team->port_mtu_change_allowed = true;
1782         list_for_each_entry(port, &team->port_list, list) {
1783                 err = dev_set_mtu(port->dev, new_mtu);
1784                 if (err) {
1785                         netdev_err(dev, "Device %s failed to change mtu",
1786                                    port->dev->name);
1787                         goto unwind;
1788                 }
1789         }
1790         team->port_mtu_change_allowed = false;
1791         mutex_unlock(&team->lock);
1792
1793         dev->mtu = new_mtu;
1794
1795         return 0;
1796
1797 unwind:
1798         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1799                 dev_set_mtu(port->dev, dev->mtu);
1800         team->port_mtu_change_allowed = false;
1801         mutex_unlock(&team->lock);
1802
1803         return err;
1804 }
1805
1806 static struct rtnl_link_stats64 *
1807 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1808 {
1809         struct team *team = netdev_priv(dev);
1810         struct team_pcpu_stats *p;
1811         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1812         u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1813         unsigned int start;
1814         int i;
1815
1816         for_each_possible_cpu(i) {
1817                 p = per_cpu_ptr(team->pcpu_stats, i);
1818                 do {
1819                         start = u64_stats_fetch_begin_irq(&p->syncp);
1820                         rx_packets      = p->rx_packets;
1821                         rx_bytes        = p->rx_bytes;
1822                         rx_multicast    = p->rx_multicast;
1823                         tx_packets      = p->tx_packets;
1824                         tx_bytes        = p->tx_bytes;
1825                 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1826
1827                 stats->rx_packets       += rx_packets;
1828                 stats->rx_bytes         += rx_bytes;
1829                 stats->multicast        += rx_multicast;
1830                 stats->tx_packets       += tx_packets;
1831                 stats->tx_bytes         += tx_bytes;
1832                 /*
1833                  * rx_dropped, tx_dropped & rx_nohandler are u32,
1834                  * updated without syncp protection.
1835                  */
1836                 rx_dropped      += p->rx_dropped;
1837                 tx_dropped      += p->tx_dropped;
1838                 rx_nohandler    += p->rx_nohandler;
1839         }
1840         stats->rx_dropped       = rx_dropped;
1841         stats->tx_dropped       = tx_dropped;
1842         stats->rx_nohandler     = rx_nohandler;
1843         return stats;
1844 }
1845
1846 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1847 {
1848         struct team *team = netdev_priv(dev);
1849         struct team_port *port;
1850         int err;
1851
1852         /*
1853          * Alhough this is reader, it's guarded by team lock. It's not possible
1854          * to traverse list in reverse under rcu_read_lock
1855          */
1856         mutex_lock(&team->lock);
1857         list_for_each_entry(port, &team->port_list, list) {
1858                 err = vlan_vid_add(port->dev, proto, vid);
1859                 if (err)
1860                         goto unwind;
1861         }
1862         mutex_unlock(&team->lock);
1863
1864         return 0;
1865
1866 unwind:
1867         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1868                 vlan_vid_del(port->dev, proto, vid);
1869         mutex_unlock(&team->lock);
1870
1871         return err;
1872 }
1873
1874 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1875 {
1876         struct team *team = netdev_priv(dev);
1877         struct team_port *port;
1878
1879         mutex_lock(&team->lock);
1880         list_for_each_entry(port, &team->port_list, list)
1881                 vlan_vid_del(port->dev, proto, vid);
1882         mutex_unlock(&team->lock);
1883
1884         return 0;
1885 }
1886
1887 #ifdef CONFIG_NET_POLL_CONTROLLER
1888 static void team_poll_controller(struct net_device *dev)
1889 {
1890 }
1891
1892 static void __team_netpoll_cleanup(struct team *team)
1893 {
1894         struct team_port *port;
1895
1896         list_for_each_entry(port, &team->port_list, list)
1897                 team_port_disable_netpoll(port);
1898 }
1899
1900 static void team_netpoll_cleanup(struct net_device *dev)
1901 {
1902         struct team *team = netdev_priv(dev);
1903
1904         mutex_lock(&team->lock);
1905         __team_netpoll_cleanup(team);
1906         mutex_unlock(&team->lock);
1907 }
1908
1909 static int team_netpoll_setup(struct net_device *dev,
1910                               struct netpoll_info *npifo)
1911 {
1912         struct team *team = netdev_priv(dev);
1913         struct team_port *port;
1914         int err = 0;
1915
1916         mutex_lock(&team->lock);
1917         list_for_each_entry(port, &team->port_list, list) {
1918                 err = team_port_enable_netpoll(team, port);
1919                 if (err) {
1920                         __team_netpoll_cleanup(team);
1921                         break;
1922                 }
1923         }
1924         mutex_unlock(&team->lock);
1925         return err;
1926 }
1927 #endif
1928
1929 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1930 {
1931         struct team *team = netdev_priv(dev);
1932         int err;
1933
1934         mutex_lock(&team->lock);
1935         err = team_port_add(team, port_dev);
1936         mutex_unlock(&team->lock);
1937         return err;
1938 }
1939
1940 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1941 {
1942         struct team *team = netdev_priv(dev);
1943         int err;
1944
1945         mutex_lock(&team->lock);
1946         err = team_port_del(team, port_dev);
1947         mutex_unlock(&team->lock);
1948         return err;
1949 }
1950
1951 static netdev_features_t team_fix_features(struct net_device *dev,
1952                                            netdev_features_t features)
1953 {
1954         struct team_port *port;
1955         struct team *team = netdev_priv(dev);
1956         netdev_features_t mask;
1957
1958         mask = features;
1959         features &= ~NETIF_F_ONE_FOR_ALL;
1960         features |= NETIF_F_ALL_FOR_ALL;
1961
1962         rcu_read_lock();
1963         list_for_each_entry_rcu(port, &team->port_list, list) {
1964                 features = netdev_increment_features(features,
1965                                                      port->dev->features,
1966                                                      mask);
1967         }
1968         rcu_read_unlock();
1969
1970         features = netdev_add_tso_features(features, mask);
1971
1972         return features;
1973 }
1974
1975 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1976 {
1977         struct team *team = netdev_priv(dev);
1978
1979         team->user_carrier_enabled = true;
1980
1981         if (new_carrier)
1982                 netif_carrier_on(dev);
1983         else
1984                 netif_carrier_off(dev);
1985         return 0;
1986 }
1987
1988 static const struct net_device_ops team_netdev_ops = {
1989         .ndo_init               = team_init,
1990         .ndo_uninit             = team_uninit,
1991         .ndo_open               = team_open,
1992         .ndo_stop               = team_close,
1993         .ndo_start_xmit         = team_xmit,
1994         .ndo_select_queue       = team_select_queue,
1995         .ndo_change_rx_flags    = team_change_rx_flags,
1996         .ndo_set_rx_mode        = team_set_rx_mode,
1997         .ndo_set_mac_address    = team_set_mac_address,
1998         .ndo_change_mtu         = team_change_mtu,
1999         .ndo_get_stats64        = team_get_stats64,
2000         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
2001         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
2002 #ifdef CONFIG_NET_POLL_CONTROLLER
2003         .ndo_poll_controller    = team_poll_controller,
2004         .ndo_netpoll_setup      = team_netpoll_setup,
2005         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
2006 #endif
2007         .ndo_add_slave          = team_add_slave,
2008         .ndo_del_slave          = team_del_slave,
2009         .ndo_fix_features       = team_fix_features,
2010         .ndo_change_carrier     = team_change_carrier,
2011         .ndo_bridge_setlink     = switchdev_port_bridge_setlink,
2012         .ndo_bridge_getlink     = switchdev_port_bridge_getlink,
2013         .ndo_bridge_dellink     = switchdev_port_bridge_dellink,
2014         .ndo_fdb_add            = switchdev_port_fdb_add,
2015         .ndo_fdb_del            = switchdev_port_fdb_del,
2016         .ndo_fdb_dump           = switchdev_port_fdb_dump,
2017         .ndo_features_check     = passthru_features_check,
2018 };
2019
2020 /***********************
2021  * ethtool interface
2022  ***********************/
2023
2024 static void team_ethtool_get_drvinfo(struct net_device *dev,
2025                                      struct ethtool_drvinfo *drvinfo)
2026 {
2027         strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2028         strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2029 }
2030
2031 static const struct ethtool_ops team_ethtool_ops = {
2032         .get_drvinfo            = team_ethtool_get_drvinfo,
2033         .get_link               = ethtool_op_get_link,
2034 };
2035
2036 /***********************
2037  * rt netlink interface
2038  ***********************/
2039
2040 static void team_setup_by_port(struct net_device *dev,
2041                                struct net_device *port_dev)
2042 {
2043         dev->header_ops = port_dev->header_ops;
2044         dev->type = port_dev->type;
2045         dev->hard_header_len = port_dev->hard_header_len;
2046         dev->addr_len = port_dev->addr_len;
2047         dev->mtu = port_dev->mtu;
2048         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2049         eth_hw_addr_inherit(dev, port_dev);
2050 }
2051
2052 static int team_dev_type_check_change(struct net_device *dev,
2053                                       struct net_device *port_dev)
2054 {
2055         struct team *team = netdev_priv(dev);
2056         char *portname = port_dev->name;
2057         int err;
2058
2059         if (dev->type == port_dev->type)
2060                 return 0;
2061         if (!list_empty(&team->port_list)) {
2062                 netdev_err(dev, "Device %s is of different type\n", portname);
2063                 return -EBUSY;
2064         }
2065         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2066         err = notifier_to_errno(err);
2067         if (err) {
2068                 netdev_err(dev, "Refused to change device type\n");
2069                 return err;
2070         }
2071         dev_uc_flush(dev);
2072         dev_mc_flush(dev);
2073         team_setup_by_port(dev, port_dev);
2074         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2075         return 0;
2076 }
2077
2078 static void team_setup(struct net_device *dev)
2079 {
2080         ether_setup(dev);
2081
2082         dev->netdev_ops = &team_netdev_ops;
2083         dev->ethtool_ops = &team_ethtool_ops;
2084         dev->destructor = team_destructor;
2085         dev->flags |= IFF_MULTICAST;
2086         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2087         dev->priv_flags |= IFF_NO_QUEUE;
2088         dev->priv_flags |= IFF_TEAM;
2089
2090         /*
2091          * Indicate we support unicast address filtering. That way core won't
2092          * bring us to promisc mode in case a unicast addr is added.
2093          * Let this up to underlay drivers.
2094          */
2095         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2096
2097         dev->features |= NETIF_F_LLTX;
2098         dev->features |= NETIF_F_GRO;
2099
2100         /* Don't allow team devices to change network namespaces. */
2101         dev->features |= NETIF_F_NETNS_LOCAL;
2102
2103         dev->hw_features = TEAM_VLAN_FEATURES |
2104                            NETIF_F_HW_VLAN_CTAG_TX |
2105                            NETIF_F_HW_VLAN_CTAG_RX |
2106                            NETIF_F_HW_VLAN_CTAG_FILTER;
2107
2108         dev->hw_features |= NETIF_F_GSO_ENCAP_ALL;
2109         dev->features |= dev->hw_features;
2110 }
2111
2112 static int team_newlink(struct net *src_net, struct net_device *dev,
2113                         struct nlattr *tb[], struct nlattr *data[])
2114 {
2115         if (tb[IFLA_ADDRESS] == NULL)
2116                 eth_hw_addr_random(dev);
2117
2118         return register_netdevice(dev);
2119 }
2120
2121 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
2122 {
2123         if (tb[IFLA_ADDRESS]) {
2124                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2125                         return -EINVAL;
2126                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2127                         return -EADDRNOTAVAIL;
2128         }
2129         return 0;
2130 }
2131
2132 static unsigned int team_get_num_tx_queues(void)
2133 {
2134         return TEAM_DEFAULT_NUM_TX_QUEUES;
2135 }
2136
2137 static unsigned int team_get_num_rx_queues(void)
2138 {
2139         return TEAM_DEFAULT_NUM_RX_QUEUES;
2140 }
2141
2142 static struct rtnl_link_ops team_link_ops __read_mostly = {
2143         .kind                   = DRV_NAME,
2144         .priv_size              = sizeof(struct team),
2145         .setup                  = team_setup,
2146         .newlink                = team_newlink,
2147         .validate               = team_validate,
2148         .get_num_tx_queues      = team_get_num_tx_queues,
2149         .get_num_rx_queues      = team_get_num_rx_queues,
2150 };
2151
2152
2153 /***********************************
2154  * Generic netlink custom interface
2155  ***********************************/
2156
2157 static struct genl_family team_nl_family = {
2158         .id             = GENL_ID_GENERATE,
2159         .name           = TEAM_GENL_NAME,
2160         .version        = TEAM_GENL_VERSION,
2161         .maxattr        = TEAM_ATTR_MAX,
2162         .netnsok        = true,
2163 };
2164
2165 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2166         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
2167         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
2168         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
2169         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
2170 };
2171
2172 static const struct nla_policy
2173 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2174         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
2175         [TEAM_ATTR_OPTION_NAME] = {
2176                 .type = NLA_STRING,
2177                 .len = TEAM_STRING_MAX_LEN,
2178         },
2179         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
2180         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
2181         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
2182 };
2183
2184 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2185 {
2186         struct sk_buff *msg;
2187         void *hdr;
2188         int err;
2189
2190         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2191         if (!msg)
2192                 return -ENOMEM;
2193
2194         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2195                           &team_nl_family, 0, TEAM_CMD_NOOP);
2196         if (!hdr) {
2197                 err = -EMSGSIZE;
2198                 goto err_msg_put;
2199         }
2200
2201         genlmsg_end(msg, hdr);
2202
2203         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2204
2205 err_msg_put:
2206         nlmsg_free(msg);
2207
2208         return err;
2209 }
2210
2211 /*
2212  * Netlink cmd functions should be locked by following two functions.
2213  * Since dev gets held here, that ensures dev won't disappear in between.
2214  */
2215 static struct team *team_nl_team_get(struct genl_info *info)
2216 {
2217         struct net *net = genl_info_net(info);
2218         int ifindex;
2219         struct net_device *dev;
2220         struct team *team;
2221
2222         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2223                 return NULL;
2224
2225         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2226         dev = dev_get_by_index(net, ifindex);
2227         if (!dev || dev->netdev_ops != &team_netdev_ops) {
2228                 if (dev)
2229                         dev_put(dev);
2230                 return NULL;
2231         }
2232
2233         team = netdev_priv(dev);
2234         mutex_lock(&team->lock);
2235         return team;
2236 }
2237
2238 static void team_nl_team_put(struct team *team)
2239 {
2240         mutex_unlock(&team->lock);
2241         dev_put(team->dev);
2242 }
2243
2244 typedef int team_nl_send_func_t(struct sk_buff *skb,
2245                                 struct team *team, u32 portid);
2246
2247 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2248 {
2249         return genlmsg_unicast(dev_net(team->dev), skb, portid);
2250 }
2251
2252 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2253                                        struct team_option_inst *opt_inst)
2254 {
2255         struct nlattr *option_item;
2256         struct team_option *option = opt_inst->option;
2257         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2258         struct team_gsetter_ctx ctx;
2259         int err;
2260
2261         ctx.info = opt_inst_info;
2262         err = team_option_get(team, opt_inst, &ctx);
2263         if (err)
2264                 return err;
2265
2266         option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2267         if (!option_item)
2268                 return -EMSGSIZE;
2269
2270         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2271                 goto nest_cancel;
2272         if (opt_inst_info->port &&
2273             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2274                         opt_inst_info->port->dev->ifindex))
2275                 goto nest_cancel;
2276         if (opt_inst->option->array_size &&
2277             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2278                         opt_inst_info->array_index))
2279                 goto nest_cancel;
2280
2281         switch (option->type) {
2282         case TEAM_OPTION_TYPE_U32:
2283                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2284                         goto nest_cancel;
2285                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2286                         goto nest_cancel;
2287                 break;
2288         case TEAM_OPTION_TYPE_STRING:
2289                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2290                         goto nest_cancel;
2291                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2292                                    ctx.data.str_val))
2293                         goto nest_cancel;
2294                 break;
2295         case TEAM_OPTION_TYPE_BINARY:
2296                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2297                         goto nest_cancel;
2298                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2299                             ctx.data.bin_val.ptr))
2300                         goto nest_cancel;
2301                 break;
2302         case TEAM_OPTION_TYPE_BOOL:
2303                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2304                         goto nest_cancel;
2305                 if (ctx.data.bool_val &&
2306                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2307                         goto nest_cancel;
2308                 break;
2309         case TEAM_OPTION_TYPE_S32:
2310                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2311                         goto nest_cancel;
2312                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2313                         goto nest_cancel;
2314                 break;
2315         default:
2316                 BUG();
2317         }
2318         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2319                 goto nest_cancel;
2320         if (opt_inst->changed) {
2321                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2322                         goto nest_cancel;
2323                 opt_inst->changed = false;
2324         }
2325         nla_nest_end(skb, option_item);
2326         return 0;
2327
2328 nest_cancel:
2329         nla_nest_cancel(skb, option_item);
2330         return -EMSGSIZE;
2331 }
2332
2333 static int __send_and_alloc_skb(struct sk_buff **pskb,
2334                                 struct team *team, u32 portid,
2335                                 team_nl_send_func_t *send_func)
2336 {
2337         int err;
2338
2339         if (*pskb) {
2340                 err = send_func(*pskb, team, portid);
2341                 if (err)
2342                         return err;
2343         }
2344         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2345         if (!*pskb)
2346                 return -ENOMEM;
2347         return 0;
2348 }
2349
2350 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2351                                     int flags, team_nl_send_func_t *send_func,
2352                                     struct list_head *sel_opt_inst_list)
2353 {
2354         struct nlattr *option_list;
2355         struct nlmsghdr *nlh;
2356         void *hdr;
2357         struct team_option_inst *opt_inst;
2358         int err;
2359         struct sk_buff *skb = NULL;
2360         bool incomplete;
2361         int i;
2362
2363         opt_inst = list_first_entry(sel_opt_inst_list,
2364                                     struct team_option_inst, tmp_list);
2365
2366 start_again:
2367         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2368         if (err)
2369                 return err;
2370
2371         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2372                           TEAM_CMD_OPTIONS_GET);
2373         if (!hdr)
2374                 return -EMSGSIZE;
2375
2376         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2377                 goto nla_put_failure;
2378         option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2379         if (!option_list)
2380                 goto nla_put_failure;
2381
2382         i = 0;
2383         incomplete = false;
2384         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2385                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2386                 if (err) {
2387                         if (err == -EMSGSIZE) {
2388                                 if (!i)
2389                                         goto errout;
2390                                 incomplete = true;
2391                                 break;
2392                         }
2393                         goto errout;
2394                 }
2395                 i++;
2396         }
2397
2398         nla_nest_end(skb, option_list);
2399         genlmsg_end(skb, hdr);
2400         if (incomplete)
2401                 goto start_again;
2402
2403 send_done:
2404         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2405         if (!nlh) {
2406                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2407                 if (err)
2408                         goto errout;
2409                 goto send_done;
2410         }
2411
2412         return send_func(skb, team, portid);
2413
2414 nla_put_failure:
2415         err = -EMSGSIZE;
2416 errout:
2417         genlmsg_cancel(skb, hdr);
2418         nlmsg_free(skb);
2419         return err;
2420 }
2421
2422 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2423 {
2424         struct team *team;
2425         struct team_option_inst *opt_inst;
2426         int err;
2427         LIST_HEAD(sel_opt_inst_list);
2428
2429         team = team_nl_team_get(info);
2430         if (!team)
2431                 return -EINVAL;
2432
2433         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2434                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2435         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2436                                        NLM_F_ACK, team_nl_send_unicast,
2437                                        &sel_opt_inst_list);
2438
2439         team_nl_team_put(team);
2440
2441         return err;
2442 }
2443
2444 static int team_nl_send_event_options_get(struct team *team,
2445                                           struct list_head *sel_opt_inst_list);
2446
2447 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2448 {
2449         struct team *team;
2450         int err = 0;
2451         int i;
2452         struct nlattr *nl_option;
2453         LIST_HEAD(opt_inst_list);
2454
2455         rtnl_lock();
2456
2457         team = team_nl_team_get(info);
2458         if (!team) {
2459                 err = -EINVAL;
2460                 goto rtnl_unlock;
2461         }
2462
2463         err = -EINVAL;
2464         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2465                 err = -EINVAL;
2466                 goto team_put;
2467         }
2468
2469         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2470                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2471                 struct nlattr *attr;
2472                 struct nlattr *attr_data;
2473                 enum team_option_type opt_type;
2474                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2475                 u32 opt_array_index = 0;
2476                 bool opt_is_array = false;
2477                 struct team_option_inst *opt_inst;
2478                 char *opt_name;
2479                 bool opt_found = false;
2480
2481                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2482                         err = -EINVAL;
2483                         goto team_put;
2484                 }
2485                 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2486                                        nl_option, team_nl_option_policy);
2487                 if (err)
2488                         goto team_put;
2489                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2490                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2491                         err = -EINVAL;
2492                         goto team_put;
2493                 }
2494                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2495                 case NLA_U32:
2496                         opt_type = TEAM_OPTION_TYPE_U32;
2497                         break;
2498                 case NLA_STRING:
2499                         opt_type = TEAM_OPTION_TYPE_STRING;
2500                         break;
2501                 case NLA_BINARY:
2502                         opt_type = TEAM_OPTION_TYPE_BINARY;
2503                         break;
2504                 case NLA_FLAG:
2505                         opt_type = TEAM_OPTION_TYPE_BOOL;
2506                         break;
2507                 case NLA_S32:
2508                         opt_type = TEAM_OPTION_TYPE_S32;
2509                         break;
2510                 default:
2511                         goto team_put;
2512                 }
2513
2514                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2515                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2516                         err = -EINVAL;
2517                         goto team_put;
2518                 }
2519
2520                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2521                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2522                 if (attr)
2523                         opt_port_ifindex = nla_get_u32(attr);
2524
2525                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2526                 if (attr) {
2527                         opt_is_array = true;
2528                         opt_array_index = nla_get_u32(attr);
2529                 }
2530
2531                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2532                         struct team_option *option = opt_inst->option;
2533                         struct team_gsetter_ctx ctx;
2534                         struct team_option_inst_info *opt_inst_info;
2535                         int tmp_ifindex;
2536
2537                         opt_inst_info = &opt_inst->info;
2538                         tmp_ifindex = opt_inst_info->port ?
2539                                       opt_inst_info->port->dev->ifindex : 0;
2540                         if (option->type != opt_type ||
2541                             strcmp(option->name, opt_name) ||
2542                             tmp_ifindex != opt_port_ifindex ||
2543                             (option->array_size && !opt_is_array) ||
2544                             opt_inst_info->array_index != opt_array_index)
2545                                 continue;
2546                         opt_found = true;
2547                         ctx.info = opt_inst_info;
2548                         switch (opt_type) {
2549                         case TEAM_OPTION_TYPE_U32:
2550                                 ctx.data.u32_val = nla_get_u32(attr_data);
2551                                 break;
2552                         case TEAM_OPTION_TYPE_STRING:
2553                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2554                                         err = -EINVAL;
2555                                         goto team_put;
2556                                 }
2557                                 ctx.data.str_val = nla_data(attr_data);
2558                                 break;
2559                         case TEAM_OPTION_TYPE_BINARY:
2560                                 ctx.data.bin_val.len = nla_len(attr_data);
2561                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2562                                 break;
2563                         case TEAM_OPTION_TYPE_BOOL:
2564                                 ctx.data.bool_val = attr_data ? true : false;
2565                                 break;
2566                         case TEAM_OPTION_TYPE_S32:
2567                                 ctx.data.s32_val = nla_get_s32(attr_data);
2568                                 break;
2569                         default:
2570                                 BUG();
2571                         }
2572                         err = team_option_set(team, opt_inst, &ctx);
2573                         if (err)
2574                                 goto team_put;
2575                         opt_inst->changed = true;
2576                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2577                 }
2578                 if (!opt_found) {
2579                         err = -ENOENT;
2580                         goto team_put;
2581                 }
2582         }
2583
2584         err = team_nl_send_event_options_get(team, &opt_inst_list);
2585
2586 team_put:
2587         team_nl_team_put(team);
2588 rtnl_unlock:
2589         rtnl_unlock();
2590         return err;
2591 }
2592
2593 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2594                                      struct team_port *port)
2595 {
2596         struct nlattr *port_item;
2597
2598         port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2599         if (!port_item)
2600                 goto nest_cancel;
2601         if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2602                 goto nest_cancel;
2603         if (port->changed) {
2604                 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2605                         goto nest_cancel;
2606                 port->changed = false;
2607         }
2608         if ((port->removed &&
2609              nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2610             (port->state.linkup &&
2611              nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2612             nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2613             nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2614                 goto nest_cancel;
2615         nla_nest_end(skb, port_item);
2616         return 0;
2617
2618 nest_cancel:
2619         nla_nest_cancel(skb, port_item);
2620         return -EMSGSIZE;
2621 }
2622
2623 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2624                                       int flags, team_nl_send_func_t *send_func,
2625                                       struct team_port *one_port)
2626 {
2627         struct nlattr *port_list;
2628         struct nlmsghdr *nlh;
2629         void *hdr;
2630         struct team_port *port;
2631         int err;
2632         struct sk_buff *skb = NULL;
2633         bool incomplete;
2634         int i;
2635
2636         port = list_first_entry_or_null(&team->port_list,
2637                                         struct team_port, list);
2638
2639 start_again:
2640         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2641         if (err)
2642                 return err;
2643
2644         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2645                           TEAM_CMD_PORT_LIST_GET);
2646         if (!hdr)
2647                 return -EMSGSIZE;
2648
2649         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2650                 goto nla_put_failure;
2651         port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2652         if (!port_list)
2653                 goto nla_put_failure;
2654
2655         i = 0;
2656         incomplete = false;
2657
2658         /* If one port is selected, called wants to send port list containing
2659          * only this port. Otherwise go through all listed ports and send all
2660          */
2661         if (one_port) {
2662                 err = team_nl_fill_one_port_get(skb, one_port);
2663                 if (err)
2664                         goto errout;
2665         } else if (port) {
2666                 list_for_each_entry_from(port, &team->port_list, list) {
2667                         err = team_nl_fill_one_port_get(skb, port);
2668                         if (err) {
2669                                 if (err == -EMSGSIZE) {
2670                                         if (!i)
2671                                                 goto errout;
2672                                         incomplete = true;
2673                                         break;
2674                                 }
2675                                 goto errout;
2676                         }
2677                         i++;
2678                 }
2679         }
2680
2681         nla_nest_end(skb, port_list);
2682         genlmsg_end(skb, hdr);
2683         if (incomplete)
2684                 goto start_again;
2685
2686 send_done:
2687         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2688         if (!nlh) {
2689                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2690                 if (err)
2691                         goto errout;
2692                 goto send_done;
2693         }
2694
2695         return send_func(skb, team, portid);
2696
2697 nla_put_failure:
2698         err = -EMSGSIZE;
2699 errout:
2700         genlmsg_cancel(skb, hdr);
2701         nlmsg_free(skb);
2702         return err;
2703 }
2704
2705 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2706                                      struct genl_info *info)
2707 {
2708         struct team *team;
2709         int err;
2710
2711         team = team_nl_team_get(info);
2712         if (!team)
2713                 return -EINVAL;
2714
2715         err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2716                                          NLM_F_ACK, team_nl_send_unicast, NULL);
2717
2718         team_nl_team_put(team);
2719
2720         return err;
2721 }
2722
2723 static const struct genl_ops team_nl_ops[] = {
2724         {
2725                 .cmd = TEAM_CMD_NOOP,
2726                 .doit = team_nl_cmd_noop,
2727                 .policy = team_nl_policy,
2728         },
2729         {
2730                 .cmd = TEAM_CMD_OPTIONS_SET,
2731                 .doit = team_nl_cmd_options_set,
2732                 .policy = team_nl_policy,
2733                 .flags = GENL_ADMIN_PERM,
2734         },
2735         {
2736                 .cmd = TEAM_CMD_OPTIONS_GET,
2737                 .doit = team_nl_cmd_options_get,
2738                 .policy = team_nl_policy,
2739                 .flags = GENL_ADMIN_PERM,
2740         },
2741         {
2742                 .cmd = TEAM_CMD_PORT_LIST_GET,
2743                 .doit = team_nl_cmd_port_list_get,
2744                 .policy = team_nl_policy,
2745                 .flags = GENL_ADMIN_PERM,
2746         },
2747 };
2748
2749 static const struct genl_multicast_group team_nl_mcgrps[] = {
2750         { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2751 };
2752
2753 static int team_nl_send_multicast(struct sk_buff *skb,
2754                                   struct team *team, u32 portid)
2755 {
2756         return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2757                                        skb, 0, 0, GFP_KERNEL);
2758 }
2759
2760 static int team_nl_send_event_options_get(struct team *team,
2761                                           struct list_head *sel_opt_inst_list)
2762 {
2763         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2764                                         sel_opt_inst_list);
2765 }
2766
2767 static int team_nl_send_event_port_get(struct team *team,
2768                                        struct team_port *port)
2769 {
2770         return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2771                                           port);
2772 }
2773
2774 static int team_nl_init(void)
2775 {
2776         return genl_register_family_with_ops_groups(&team_nl_family, team_nl_ops,
2777                                                     team_nl_mcgrps);
2778 }
2779
2780 static void team_nl_fini(void)
2781 {
2782         genl_unregister_family(&team_nl_family);
2783 }
2784
2785
2786 /******************
2787  * Change checkers
2788  ******************/
2789
2790 static void __team_options_change_check(struct team *team)
2791 {
2792         int err;
2793         struct team_option_inst *opt_inst;
2794         LIST_HEAD(sel_opt_inst_list);
2795
2796         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2797                 if (opt_inst->changed)
2798                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2799         }
2800         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2801         if (err && err != -ESRCH)
2802                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2803                             err);
2804 }
2805
2806 /* rtnl lock is held */
2807
2808 static void __team_port_change_send(struct team_port *port, bool linkup)
2809 {
2810         int err;
2811
2812         port->changed = true;
2813         port->state.linkup = linkup;
2814         team_refresh_port_linkup(port);
2815         if (linkup) {
2816                 struct ethtool_cmd ecmd;
2817
2818                 err = __ethtool_get_settings(port->dev, &ecmd);
2819                 if (!err) {
2820                         port->state.speed = ethtool_cmd_speed(&ecmd);
2821                         port->state.duplex = ecmd.duplex;
2822                         goto send_event;
2823                 }
2824         }
2825         port->state.speed = 0;
2826         port->state.duplex = 0;
2827
2828 send_event:
2829         err = team_nl_send_event_port_get(port->team, port);
2830         if (err && err != -ESRCH)
2831                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2832                             port->dev->name, err);
2833
2834 }
2835
2836 static void __team_carrier_check(struct team *team)
2837 {
2838         struct team_port *port;
2839         bool team_linkup;
2840
2841         if (team->user_carrier_enabled)
2842                 return;
2843
2844         team_linkup = false;
2845         list_for_each_entry(port, &team->port_list, list) {
2846                 if (port->linkup) {
2847                         team_linkup = true;
2848                         break;
2849                 }
2850         }
2851
2852         if (team_linkup)
2853                 netif_carrier_on(team->dev);
2854         else
2855                 netif_carrier_off(team->dev);
2856 }
2857
2858 static void __team_port_change_check(struct team_port *port, bool linkup)
2859 {
2860         if (port->state.linkup != linkup)
2861                 __team_port_change_send(port, linkup);
2862         __team_carrier_check(port->team);
2863 }
2864
2865 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2866 {
2867         __team_port_change_send(port, linkup);
2868         __team_carrier_check(port->team);
2869 }
2870
2871 static void __team_port_change_port_removed(struct team_port *port)
2872 {
2873         port->removed = true;
2874         __team_port_change_send(port, false);
2875         __team_carrier_check(port->team);
2876 }
2877
2878 static void team_port_change_check(struct team_port *port, bool linkup)
2879 {
2880         struct team *team = port->team;
2881
2882         mutex_lock(&team->lock);
2883         __team_port_change_check(port, linkup);
2884         mutex_unlock(&team->lock);
2885 }
2886
2887
2888 /************************************
2889  * Net device notifier event handler
2890  ************************************/
2891
2892 static int team_device_event(struct notifier_block *unused,
2893                              unsigned long event, void *ptr)
2894 {
2895         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2896         struct team_port *port;
2897
2898         port = team_port_get_rtnl(dev);
2899         if (!port)
2900                 return NOTIFY_DONE;
2901
2902         switch (event) {
2903         case NETDEV_UP:
2904                 if (netif_carrier_ok(dev))
2905                         team_port_change_check(port, true);
2906                 break;
2907         case NETDEV_DOWN:
2908                 team_port_change_check(port, false);
2909                 break;
2910         case NETDEV_CHANGE:
2911                 if (netif_running(port->dev))
2912                         team_port_change_check(port,
2913                                                !!netif_carrier_ok(port->dev));
2914                 break;
2915         case NETDEV_UNREGISTER:
2916                 team_del_slave(port->team->dev, dev);
2917                 break;
2918         case NETDEV_FEAT_CHANGE:
2919                 team_compute_features(port->team);
2920                 break;
2921         case NETDEV_PRECHANGEMTU:
2922                 /* Forbid to change mtu of underlaying device */
2923                 if (!port->team->port_mtu_change_allowed)
2924                         return NOTIFY_BAD;
2925                 break;
2926         case NETDEV_PRE_TYPE_CHANGE:
2927                 /* Forbid to change type of underlaying device */
2928                 return NOTIFY_BAD;
2929         case NETDEV_RESEND_IGMP:
2930                 /* Propagate to master device */
2931                 call_netdevice_notifiers(event, port->team->dev);
2932                 break;
2933         }
2934         return NOTIFY_DONE;
2935 }
2936
2937 static struct notifier_block team_notifier_block __read_mostly = {
2938         .notifier_call = team_device_event,
2939 };
2940
2941
2942 /***********************
2943  * Module init and exit
2944  ***********************/
2945
2946 static int __init team_module_init(void)
2947 {
2948         int err;
2949
2950         register_netdevice_notifier(&team_notifier_block);
2951
2952         err = rtnl_link_register(&team_link_ops);
2953         if (err)
2954                 goto err_rtnl_reg;
2955
2956         err = team_nl_init();
2957         if (err)
2958                 goto err_nl_init;
2959
2960         return 0;
2961
2962 err_nl_init:
2963         rtnl_link_unregister(&team_link_ops);
2964
2965 err_rtnl_reg:
2966         unregister_netdevice_notifier(&team_notifier_block);
2967
2968         return err;
2969 }
2970
2971 static void __exit team_module_exit(void)
2972 {
2973         team_nl_fini();
2974         rtnl_link_unregister(&team_link_ops);
2975         unregister_netdevice_notifier(&team_notifier_block);
2976 }
2977
2978 module_init(team_module_init);
2979 module_exit(team_module_exit);
2980
2981 MODULE_LICENSE("GPL v2");
2982 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2983 MODULE_DESCRIPTION("Ethernet team device driver");
2984 MODULE_ALIAS_RTNL_LINK(DRV_NAME);