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
1026 static void __team_compute_features(struct team *team)
1027 {
1028         ___team_compute_features(team);
1029         netdev_change_features(team->dev);
1030 }
1031
1032 static void team_compute_features(struct team *team)
1033 {
1034         mutex_lock(&team->lock);
1035         ___team_compute_features(team);
1036         mutex_unlock(&team->lock);
1037         netdev_change_features(team->dev);
1038 }
1039
1040 static int team_port_enter(struct team *team, struct team_port *port)
1041 {
1042         int err = 0;
1043
1044         dev_hold(team->dev);
1045         if (team->ops.port_enter) {
1046                 err = team->ops.port_enter(team, port);
1047                 if (err) {
1048                         netdev_err(team->dev, "Device %s failed to enter team mode\n",
1049                                    port->dev->name);
1050                         goto err_port_enter;
1051                 }
1052         }
1053
1054         return 0;
1055
1056 err_port_enter:
1057         dev_put(team->dev);
1058
1059         return err;
1060 }
1061
1062 static void team_port_leave(struct team *team, struct team_port *port)
1063 {
1064         if (team->ops.port_leave)
1065                 team->ops.port_leave(team, port);
1066         dev_put(team->dev);
1067 }
1068
1069 #ifdef CONFIG_NET_POLL_CONTROLLER
1070 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1071 {
1072         struct netpoll *np;
1073         int err;
1074
1075         if (!team->dev->npinfo)
1076                 return 0;
1077
1078         np = kzalloc(sizeof(*np), GFP_KERNEL);
1079         if (!np)
1080                 return -ENOMEM;
1081
1082         err = __netpoll_setup(np, port->dev);
1083         if (err) {
1084                 kfree(np);
1085                 return err;
1086         }
1087         port->np = np;
1088         return err;
1089 }
1090
1091 static void team_port_disable_netpoll(struct team_port *port)
1092 {
1093         struct netpoll *np = port->np;
1094
1095         if (!np)
1096                 return;
1097         port->np = NULL;
1098
1099         /* Wait for transmitting packets to finish before freeing. */
1100         synchronize_rcu_bh();
1101         __netpoll_cleanup(np);
1102         kfree(np);
1103 }
1104 #else
1105 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1106 {
1107         return 0;
1108 }
1109 static void team_port_disable_netpoll(struct team_port *port)
1110 {
1111 }
1112 #endif
1113
1114 static int team_upper_dev_link(struct team *team, struct team_port *port)
1115 {
1116         struct netdev_lag_upper_info lag_upper_info;
1117         int err;
1118
1119         lag_upper_info.tx_type = team->mode->lag_tx_type;
1120         err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1121                                            &lag_upper_info);
1122         if (err)
1123                 return err;
1124         port->dev->priv_flags |= IFF_TEAM_PORT;
1125         return 0;
1126 }
1127
1128 static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1129 {
1130         netdev_upper_dev_unlink(port->dev, team->dev);
1131         port->dev->priv_flags &= ~IFF_TEAM_PORT;
1132 }
1133
1134 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1135 static int team_dev_type_check_change(struct net_device *dev,
1136                                       struct net_device *port_dev);
1137
1138 static int team_port_add(struct team *team, struct net_device *port_dev)
1139 {
1140         struct net_device *dev = team->dev;
1141         struct team_port *port;
1142         char *portname = port_dev->name;
1143         int err;
1144
1145         if (port_dev->flags & IFF_LOOPBACK) {
1146                 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1147                            portname);
1148                 return -EINVAL;
1149         }
1150
1151         if (team_port_exists(port_dev)) {
1152                 netdev_err(dev, "Device %s is already a port "
1153                                 "of a team device\n", portname);
1154                 return -EBUSY;
1155         }
1156
1157         if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1158             vlan_uses_dev(dev)) {
1159                 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1160                            portname);
1161                 return -EPERM;
1162         }
1163
1164         err = team_dev_type_check_change(dev, port_dev);
1165         if (err)
1166                 return err;
1167
1168         if (port_dev->flags & IFF_UP) {
1169                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1170                            portname);
1171                 return -EBUSY;
1172         }
1173
1174         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1175                        GFP_KERNEL);
1176         if (!port)
1177                 return -ENOMEM;
1178
1179         port->dev = port_dev;
1180         port->team = team;
1181         INIT_LIST_HEAD(&port->qom_list);
1182
1183         port->orig.mtu = port_dev->mtu;
1184         err = dev_set_mtu(port_dev, dev->mtu);
1185         if (err) {
1186                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1187                 goto err_set_mtu;
1188         }
1189
1190         memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1191
1192         err = team_port_enter(team, port);
1193         if (err) {
1194                 netdev_err(dev, "Device %s failed to enter team mode\n",
1195                            portname);
1196                 goto err_port_enter;
1197         }
1198
1199         err = dev_open(port_dev);
1200         if (err) {
1201                 netdev_dbg(dev, "Device %s opening failed\n",
1202                            portname);
1203                 goto err_dev_open;
1204         }
1205
1206         netif_addr_lock_bh(dev);
1207         dev_uc_sync_multiple(port_dev, dev);
1208         dev_mc_sync_multiple(port_dev, dev);
1209         netif_addr_unlock_bh(dev);
1210
1211         err = vlan_vids_add_by_dev(port_dev, dev);
1212         if (err) {
1213                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1214                                 portname);
1215                 goto err_vids_add;
1216         }
1217
1218         err = team_port_enable_netpoll(team, port);
1219         if (err) {
1220                 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1221                            portname);
1222                 goto err_enable_netpoll;
1223         }
1224
1225         if (!(dev->features & NETIF_F_LRO))
1226                 dev_disable_lro(port_dev);
1227
1228         err = netdev_rx_handler_register(port_dev, team_handle_frame,
1229                                          port);
1230         if (err) {
1231                 netdev_err(dev, "Device %s failed to register rx_handler\n",
1232                            portname);
1233                 goto err_handler_register;
1234         }
1235
1236         err = team_upper_dev_link(team, port);
1237         if (err) {
1238                 netdev_err(dev, "Device %s failed to set upper link\n",
1239                            portname);
1240                 goto err_set_upper_link;
1241         }
1242
1243         err = __team_option_inst_add_port(team, port);
1244         if (err) {
1245                 netdev_err(dev, "Device %s failed to add per-port options\n",
1246                            portname);
1247                 goto err_option_port_add;
1248         }
1249
1250         port->index = -1;
1251         list_add_tail_rcu(&port->list, &team->port_list);
1252         team_port_enable(team, port);
1253         __team_compute_features(team);
1254         __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1255         __team_options_change_check(team);
1256
1257         netdev_info(dev, "Port device %s added\n", portname);
1258
1259         return 0;
1260
1261 err_option_port_add:
1262         team_upper_dev_unlink(team, port);
1263
1264 err_set_upper_link:
1265         netdev_rx_handler_unregister(port_dev);
1266
1267 err_handler_register:
1268         team_port_disable_netpoll(port);
1269
1270 err_enable_netpoll:
1271         vlan_vids_del_by_dev(port_dev, dev);
1272
1273 err_vids_add:
1274         dev_uc_unsync(port_dev, dev);
1275         dev_mc_unsync(port_dev, dev);
1276         dev_close(port_dev);
1277
1278 err_dev_open:
1279         team_port_leave(team, port);
1280         team_port_set_orig_dev_addr(port);
1281
1282 err_port_enter:
1283         dev_set_mtu(port_dev, port->orig.mtu);
1284
1285 err_set_mtu:
1286         kfree(port);
1287
1288         return err;
1289 }
1290
1291 static void __team_port_change_port_removed(struct team_port *port);
1292
1293 static int team_port_del(struct team *team, struct net_device *port_dev)
1294 {
1295         struct net_device *dev = team->dev;
1296         struct team_port *port;
1297         char *portname = port_dev->name;
1298
1299         port = team_port_get_rtnl(port_dev);
1300         if (!port || !team_port_find(team, port)) {
1301                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1302                            portname);
1303                 return -ENOENT;
1304         }
1305
1306         team_port_disable(team, port);
1307         list_del_rcu(&port->list);
1308         team_upper_dev_unlink(team, port);
1309         netdev_rx_handler_unregister(port_dev);
1310         team_port_disable_netpoll(port);
1311         vlan_vids_del_by_dev(port_dev, dev);
1312         dev_uc_unsync(port_dev, dev);
1313         dev_mc_unsync(port_dev, dev);
1314         dev_close(port_dev);
1315         team_port_leave(team, port);
1316
1317         __team_option_inst_mark_removed_port(team, port);
1318         __team_options_change_check(team);
1319         __team_option_inst_del_port(team, port);
1320         __team_port_change_port_removed(port);
1321
1322         team_port_set_orig_dev_addr(port);
1323         dev_set_mtu(port_dev, port->orig.mtu);
1324         kfree_rcu(port, rcu);
1325         netdev_info(dev, "Port device %s removed\n", portname);
1326         __team_compute_features(team);
1327
1328         return 0;
1329 }
1330
1331
1332 /*****************
1333  * Net device ops
1334  *****************/
1335
1336 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1337 {
1338         ctx->data.str_val = team->mode->kind;
1339         return 0;
1340 }
1341
1342 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1343 {
1344         return team_change_mode(team, ctx->data.str_val);
1345 }
1346
1347 static int team_notify_peers_count_get(struct team *team,
1348                                        struct team_gsetter_ctx *ctx)
1349 {
1350         ctx->data.u32_val = team->notify_peers.count;
1351         return 0;
1352 }
1353
1354 static int team_notify_peers_count_set(struct team *team,
1355                                        struct team_gsetter_ctx *ctx)
1356 {
1357         team->notify_peers.count = ctx->data.u32_val;
1358         return 0;
1359 }
1360
1361 static int team_notify_peers_interval_get(struct team *team,
1362                                           struct team_gsetter_ctx *ctx)
1363 {
1364         ctx->data.u32_val = team->notify_peers.interval;
1365         return 0;
1366 }
1367
1368 static int team_notify_peers_interval_set(struct team *team,
1369                                           struct team_gsetter_ctx *ctx)
1370 {
1371         team->notify_peers.interval = ctx->data.u32_val;
1372         return 0;
1373 }
1374
1375 static int team_mcast_rejoin_count_get(struct team *team,
1376                                        struct team_gsetter_ctx *ctx)
1377 {
1378         ctx->data.u32_val = team->mcast_rejoin.count;
1379         return 0;
1380 }
1381
1382 static int team_mcast_rejoin_count_set(struct team *team,
1383                                        struct team_gsetter_ctx *ctx)
1384 {
1385         team->mcast_rejoin.count = ctx->data.u32_val;
1386         return 0;
1387 }
1388
1389 static int team_mcast_rejoin_interval_get(struct team *team,
1390                                           struct team_gsetter_ctx *ctx)
1391 {
1392         ctx->data.u32_val = team->mcast_rejoin.interval;
1393         return 0;
1394 }
1395
1396 static int team_mcast_rejoin_interval_set(struct team *team,
1397                                           struct team_gsetter_ctx *ctx)
1398 {
1399         team->mcast_rejoin.interval = ctx->data.u32_val;
1400         return 0;
1401 }
1402
1403 static int team_port_en_option_get(struct team *team,
1404                                    struct team_gsetter_ctx *ctx)
1405 {
1406         struct team_port *port = ctx->info->port;
1407
1408         ctx->data.bool_val = team_port_enabled(port);
1409         return 0;
1410 }
1411
1412 static int team_port_en_option_set(struct team *team,
1413                                    struct team_gsetter_ctx *ctx)
1414 {
1415         struct team_port *port = ctx->info->port;
1416
1417         if (ctx->data.bool_val)
1418                 team_port_enable(team, port);
1419         else
1420                 team_port_disable(team, port);
1421         return 0;
1422 }
1423
1424 static int team_user_linkup_option_get(struct team *team,
1425                                        struct team_gsetter_ctx *ctx)
1426 {
1427         struct team_port *port = ctx->info->port;
1428
1429         ctx->data.bool_val = port->user.linkup;
1430         return 0;
1431 }
1432
1433 static void __team_carrier_check(struct team *team);
1434
1435 static int team_user_linkup_option_set(struct team *team,
1436                                        struct team_gsetter_ctx *ctx)
1437 {
1438         struct team_port *port = ctx->info->port;
1439
1440         port->user.linkup = ctx->data.bool_val;
1441         team_refresh_port_linkup(port);
1442         __team_carrier_check(port->team);
1443         return 0;
1444 }
1445
1446 static int team_user_linkup_en_option_get(struct team *team,
1447                                           struct team_gsetter_ctx *ctx)
1448 {
1449         struct team_port *port = ctx->info->port;
1450
1451         ctx->data.bool_val = port->user.linkup_enabled;
1452         return 0;
1453 }
1454
1455 static int team_user_linkup_en_option_set(struct team *team,
1456                                           struct team_gsetter_ctx *ctx)
1457 {
1458         struct team_port *port = ctx->info->port;
1459
1460         port->user.linkup_enabled = ctx->data.bool_val;
1461         team_refresh_port_linkup(port);
1462         __team_carrier_check(port->team);
1463         return 0;
1464 }
1465
1466 static int team_priority_option_get(struct team *team,
1467                                     struct team_gsetter_ctx *ctx)
1468 {
1469         struct team_port *port = ctx->info->port;
1470
1471         ctx->data.s32_val = port->priority;
1472         return 0;
1473 }
1474
1475 static int team_priority_option_set(struct team *team,
1476                                     struct team_gsetter_ctx *ctx)
1477 {
1478         struct team_port *port = ctx->info->port;
1479         s32 priority = ctx->data.s32_val;
1480
1481         if (port->priority == priority)
1482                 return 0;
1483         port->priority = priority;
1484         team_queue_override_port_prio_changed(team, port);
1485         return 0;
1486 }
1487
1488 static int team_queue_id_option_get(struct team *team,
1489                                     struct team_gsetter_ctx *ctx)
1490 {
1491         struct team_port *port = ctx->info->port;
1492
1493         ctx->data.u32_val = port->queue_id;
1494         return 0;
1495 }
1496
1497 static int team_queue_id_option_set(struct team *team,
1498                                     struct team_gsetter_ctx *ctx)
1499 {
1500         struct team_port *port = ctx->info->port;
1501         u16 new_queue_id = ctx->data.u32_val;
1502
1503         if (port->queue_id == new_queue_id)
1504                 return 0;
1505         if (new_queue_id >= team->dev->real_num_tx_queues)
1506                 return -EINVAL;
1507         team_queue_override_port_change_queue_id(team, port, new_queue_id);
1508         return 0;
1509 }
1510
1511 static const struct team_option team_options[] = {
1512         {
1513                 .name = "mode",
1514                 .type = TEAM_OPTION_TYPE_STRING,
1515                 .getter = team_mode_option_get,
1516                 .setter = team_mode_option_set,
1517         },
1518         {
1519                 .name = "notify_peers_count",
1520                 .type = TEAM_OPTION_TYPE_U32,
1521                 .getter = team_notify_peers_count_get,
1522                 .setter = team_notify_peers_count_set,
1523         },
1524         {
1525                 .name = "notify_peers_interval",
1526                 .type = TEAM_OPTION_TYPE_U32,
1527                 .getter = team_notify_peers_interval_get,
1528                 .setter = team_notify_peers_interval_set,
1529         },
1530         {
1531                 .name = "mcast_rejoin_count",
1532                 .type = TEAM_OPTION_TYPE_U32,
1533                 .getter = team_mcast_rejoin_count_get,
1534                 .setter = team_mcast_rejoin_count_set,
1535         },
1536         {
1537                 .name = "mcast_rejoin_interval",
1538                 .type = TEAM_OPTION_TYPE_U32,
1539                 .getter = team_mcast_rejoin_interval_get,
1540                 .setter = team_mcast_rejoin_interval_set,
1541         },
1542         {
1543                 .name = "enabled",
1544                 .type = TEAM_OPTION_TYPE_BOOL,
1545                 .per_port = true,
1546                 .getter = team_port_en_option_get,
1547                 .setter = team_port_en_option_set,
1548         },
1549         {
1550                 .name = "user_linkup",
1551                 .type = TEAM_OPTION_TYPE_BOOL,
1552                 .per_port = true,
1553                 .getter = team_user_linkup_option_get,
1554                 .setter = team_user_linkup_option_set,
1555         },
1556         {
1557                 .name = "user_linkup_enabled",
1558                 .type = TEAM_OPTION_TYPE_BOOL,
1559                 .per_port = true,
1560                 .getter = team_user_linkup_en_option_get,
1561                 .setter = team_user_linkup_en_option_set,
1562         },
1563         {
1564                 .name = "priority",
1565                 .type = TEAM_OPTION_TYPE_S32,
1566                 .per_port = true,
1567                 .getter = team_priority_option_get,
1568                 .setter = team_priority_option_set,
1569         },
1570         {
1571                 .name = "queue_id",
1572                 .type = TEAM_OPTION_TYPE_U32,
1573                 .per_port = true,
1574                 .getter = team_queue_id_option_get,
1575                 .setter = team_queue_id_option_set,
1576         },
1577 };
1578
1579
1580 static int team_init(struct net_device *dev)
1581 {
1582         struct team *team = netdev_priv(dev);
1583         int i;
1584         int err;
1585
1586         team->dev = dev;
1587         mutex_init(&team->lock);
1588         team_set_no_mode(team);
1589
1590         team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1591         if (!team->pcpu_stats)
1592                 return -ENOMEM;
1593
1594         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1595                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1596         INIT_LIST_HEAD(&team->port_list);
1597         err = team_queue_override_init(team);
1598         if (err)
1599                 goto err_team_queue_override_init;
1600
1601         team_adjust_ops(team);
1602
1603         INIT_LIST_HEAD(&team->option_list);
1604         INIT_LIST_HEAD(&team->option_inst_list);
1605
1606         team_notify_peers_init(team);
1607         team_mcast_rejoin_init(team);
1608
1609         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1610         if (err)
1611                 goto err_options_register;
1612         netif_carrier_off(dev);
1613
1614         netdev_lockdep_set_classes(dev);
1615
1616         return 0;
1617
1618 err_options_register:
1619         team_mcast_rejoin_fini(team);
1620         team_notify_peers_fini(team);
1621         team_queue_override_fini(team);
1622 err_team_queue_override_init:
1623         free_percpu(team->pcpu_stats);
1624
1625         return err;
1626 }
1627
1628 static void team_uninit(struct net_device *dev)
1629 {
1630         struct team *team = netdev_priv(dev);
1631         struct team_port *port;
1632         struct team_port *tmp;
1633
1634         mutex_lock(&team->lock);
1635         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1636                 team_port_del(team, port->dev);
1637
1638         __team_change_mode(team, NULL); /* cleanup */
1639         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1640         team_mcast_rejoin_fini(team);
1641         team_notify_peers_fini(team);
1642         team_queue_override_fini(team);
1643         mutex_unlock(&team->lock);
1644 }
1645
1646 static void team_destructor(struct net_device *dev)
1647 {
1648         struct team *team = netdev_priv(dev);
1649
1650         free_percpu(team->pcpu_stats);
1651         free_netdev(dev);
1652 }
1653
1654 static int team_open(struct net_device *dev)
1655 {
1656         return 0;
1657 }
1658
1659 static int team_close(struct net_device *dev)
1660 {
1661         return 0;
1662 }
1663
1664 /*
1665  * note: already called with rcu_read_lock
1666  */
1667 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1668 {
1669         struct team *team = netdev_priv(dev);
1670         bool tx_success;
1671         unsigned int len = skb->len;
1672
1673         tx_success = team_queue_override_transmit(team, skb);
1674         if (!tx_success)
1675                 tx_success = team->ops.transmit(team, skb);
1676         if (tx_success) {
1677                 struct team_pcpu_stats *pcpu_stats;
1678
1679                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1680                 u64_stats_update_begin(&pcpu_stats->syncp);
1681                 pcpu_stats->tx_packets++;
1682                 pcpu_stats->tx_bytes += len;
1683                 u64_stats_update_end(&pcpu_stats->syncp);
1684         } else {
1685                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1686         }
1687
1688         return NETDEV_TX_OK;
1689 }
1690
1691 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1692                              void *accel_priv, select_queue_fallback_t fallback)
1693 {
1694         /*
1695          * This helper function exists to help dev_pick_tx get the correct
1696          * destination queue.  Using a helper function skips a call to
1697          * skb_tx_hash and will put the skbs in the queue we expect on their
1698          * way down to the team driver.
1699          */
1700         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1701
1702         /*
1703          * Save the original txq to restore before passing to the driver
1704          */
1705         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1706
1707         if (unlikely(txq >= dev->real_num_tx_queues)) {
1708                 do {
1709                         txq -= dev->real_num_tx_queues;
1710                 } while (txq >= dev->real_num_tx_queues);
1711         }
1712         return txq;
1713 }
1714
1715 static void team_change_rx_flags(struct net_device *dev, int change)
1716 {
1717         struct team *team = netdev_priv(dev);
1718         struct team_port *port;
1719         int inc;
1720
1721         rcu_read_lock();
1722         list_for_each_entry_rcu(port, &team->port_list, list) {
1723                 if (change & IFF_PROMISC) {
1724                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1725                         dev_set_promiscuity(port->dev, inc);
1726                 }
1727                 if (change & IFF_ALLMULTI) {
1728                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1729                         dev_set_allmulti(port->dev, inc);
1730                 }
1731         }
1732         rcu_read_unlock();
1733 }
1734
1735 static void team_set_rx_mode(struct net_device *dev)
1736 {
1737         struct team *team = netdev_priv(dev);
1738         struct team_port *port;
1739
1740         rcu_read_lock();
1741         list_for_each_entry_rcu(port, &team->port_list, list) {
1742                 dev_uc_sync_multiple(port->dev, dev);
1743                 dev_mc_sync_multiple(port->dev, dev);
1744         }
1745         rcu_read_unlock();
1746 }
1747
1748 static int team_set_mac_address(struct net_device *dev, void *p)
1749 {
1750         struct sockaddr *addr = p;
1751         struct team *team = netdev_priv(dev);
1752         struct team_port *port;
1753
1754         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1755                 return -EADDRNOTAVAIL;
1756         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1757         mutex_lock(&team->lock);
1758         list_for_each_entry(port, &team->port_list, list)
1759                 if (team->ops.port_change_dev_addr)
1760                         team->ops.port_change_dev_addr(team, port);
1761         mutex_unlock(&team->lock);
1762         return 0;
1763 }
1764
1765 static int team_change_mtu(struct net_device *dev, int new_mtu)
1766 {
1767         struct team *team = netdev_priv(dev);
1768         struct team_port *port;
1769         int err;
1770
1771         /*
1772          * Alhough this is reader, it's guarded by team lock. It's not possible
1773          * to traverse list in reverse under rcu_read_lock
1774          */
1775         mutex_lock(&team->lock);
1776         team->port_mtu_change_allowed = true;
1777         list_for_each_entry(port, &team->port_list, list) {
1778                 err = dev_set_mtu(port->dev, new_mtu);
1779                 if (err) {
1780                         netdev_err(dev, "Device %s failed to change mtu",
1781                                    port->dev->name);
1782                         goto unwind;
1783                 }
1784         }
1785         team->port_mtu_change_allowed = false;
1786         mutex_unlock(&team->lock);
1787
1788         dev->mtu = new_mtu;
1789
1790         return 0;
1791
1792 unwind:
1793         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1794                 dev_set_mtu(port->dev, dev->mtu);
1795         team->port_mtu_change_allowed = false;
1796         mutex_unlock(&team->lock);
1797
1798         return err;
1799 }
1800
1801 static void
1802 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1803 {
1804         struct team *team = netdev_priv(dev);
1805         struct team_pcpu_stats *p;
1806         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1807         u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1808         unsigned int start;
1809         int i;
1810
1811         for_each_possible_cpu(i) {
1812                 p = per_cpu_ptr(team->pcpu_stats, i);
1813                 do {
1814                         start = u64_stats_fetch_begin_irq(&p->syncp);
1815                         rx_packets      = p->rx_packets;
1816                         rx_bytes        = p->rx_bytes;
1817                         rx_multicast    = p->rx_multicast;
1818                         tx_packets      = p->tx_packets;
1819                         tx_bytes        = p->tx_bytes;
1820                 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1821
1822                 stats->rx_packets       += rx_packets;
1823                 stats->rx_bytes         += rx_bytes;
1824                 stats->multicast        += rx_multicast;
1825                 stats->tx_packets       += tx_packets;
1826                 stats->tx_bytes         += tx_bytes;
1827                 /*
1828                  * rx_dropped, tx_dropped & rx_nohandler are u32,
1829                  * updated without syncp protection.
1830                  */
1831                 rx_dropped      += p->rx_dropped;
1832                 tx_dropped      += p->tx_dropped;
1833                 rx_nohandler    += p->rx_nohandler;
1834         }
1835         stats->rx_dropped       = rx_dropped;
1836         stats->tx_dropped       = tx_dropped;
1837         stats->rx_nohandler     = rx_nohandler;
1838 }
1839
1840 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1841 {
1842         struct team *team = netdev_priv(dev);
1843         struct team_port *port;
1844         int err;
1845
1846         /*
1847          * Alhough this is reader, it's guarded by team lock. It's not possible
1848          * to traverse list in reverse under rcu_read_lock
1849          */
1850         mutex_lock(&team->lock);
1851         list_for_each_entry(port, &team->port_list, list) {
1852                 err = vlan_vid_add(port->dev, proto, vid);
1853                 if (err)
1854                         goto unwind;
1855         }
1856         mutex_unlock(&team->lock);
1857
1858         return 0;
1859
1860 unwind:
1861         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1862                 vlan_vid_del(port->dev, proto, vid);
1863         mutex_unlock(&team->lock);
1864
1865         return err;
1866 }
1867
1868 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1869 {
1870         struct team *team = netdev_priv(dev);
1871         struct team_port *port;
1872
1873         mutex_lock(&team->lock);
1874         list_for_each_entry(port, &team->port_list, list)
1875                 vlan_vid_del(port->dev, proto, vid);
1876         mutex_unlock(&team->lock);
1877
1878         return 0;
1879 }
1880
1881 #ifdef CONFIG_NET_POLL_CONTROLLER
1882 static void team_poll_controller(struct net_device *dev)
1883 {
1884 }
1885
1886 static void __team_netpoll_cleanup(struct team *team)
1887 {
1888         struct team_port *port;
1889
1890         list_for_each_entry(port, &team->port_list, list)
1891                 team_port_disable_netpoll(port);
1892 }
1893
1894 static void team_netpoll_cleanup(struct net_device *dev)
1895 {
1896         struct team *team = netdev_priv(dev);
1897
1898         mutex_lock(&team->lock);
1899         __team_netpoll_cleanup(team);
1900         mutex_unlock(&team->lock);
1901 }
1902
1903 static int team_netpoll_setup(struct net_device *dev,
1904                               struct netpoll_info *npifo)
1905 {
1906         struct team *team = netdev_priv(dev);
1907         struct team_port *port;
1908         int err = 0;
1909
1910         mutex_lock(&team->lock);
1911         list_for_each_entry(port, &team->port_list, list) {
1912                 err = team_port_enable_netpoll(team, port);
1913                 if (err) {
1914                         __team_netpoll_cleanup(team);
1915                         break;
1916                 }
1917         }
1918         mutex_unlock(&team->lock);
1919         return err;
1920 }
1921 #endif
1922
1923 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1924 {
1925         struct team *team = netdev_priv(dev);
1926         int err;
1927
1928         mutex_lock(&team->lock);
1929         err = team_port_add(team, port_dev);
1930         mutex_unlock(&team->lock);
1931         return err;
1932 }
1933
1934 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1935 {
1936         struct team *team = netdev_priv(dev);
1937         int err;
1938
1939         mutex_lock(&team->lock);
1940         err = team_port_del(team, port_dev);
1941         mutex_unlock(&team->lock);
1942         return err;
1943 }
1944
1945 static netdev_features_t team_fix_features(struct net_device *dev,
1946                                            netdev_features_t features)
1947 {
1948         struct team_port *port;
1949         struct team *team = netdev_priv(dev);
1950         netdev_features_t mask;
1951
1952         mask = features;
1953         features &= ~NETIF_F_ONE_FOR_ALL;
1954         features |= NETIF_F_ALL_FOR_ALL;
1955
1956         rcu_read_lock();
1957         list_for_each_entry_rcu(port, &team->port_list, list) {
1958                 features = netdev_increment_features(features,
1959                                                      port->dev->features,
1960                                                      mask);
1961         }
1962         rcu_read_unlock();
1963
1964         features = netdev_add_tso_features(features, mask);
1965
1966         return features;
1967 }
1968
1969 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1970 {
1971         struct team *team = netdev_priv(dev);
1972
1973         team->user_carrier_enabled = true;
1974
1975         if (new_carrier)
1976                 netif_carrier_on(dev);
1977         else
1978                 netif_carrier_off(dev);
1979         return 0;
1980 }
1981
1982 static const struct net_device_ops team_netdev_ops = {
1983         .ndo_init               = team_init,
1984         .ndo_uninit             = team_uninit,
1985         .ndo_open               = team_open,
1986         .ndo_stop               = team_close,
1987         .ndo_start_xmit         = team_xmit,
1988         .ndo_select_queue       = team_select_queue,
1989         .ndo_change_rx_flags    = team_change_rx_flags,
1990         .ndo_set_rx_mode        = team_set_rx_mode,
1991         .ndo_set_mac_address    = team_set_mac_address,
1992         .ndo_change_mtu         = team_change_mtu,
1993         .ndo_get_stats64        = team_get_stats64,
1994         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
1995         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
1996 #ifdef CONFIG_NET_POLL_CONTROLLER
1997         .ndo_poll_controller    = team_poll_controller,
1998         .ndo_netpoll_setup      = team_netpoll_setup,
1999         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
2000 #endif
2001         .ndo_add_slave          = team_add_slave,
2002         .ndo_del_slave          = team_del_slave,
2003         .ndo_fix_features       = team_fix_features,
2004         .ndo_change_carrier     = team_change_carrier,
2005         .ndo_bridge_setlink     = switchdev_port_bridge_setlink,
2006         .ndo_bridge_getlink     = switchdev_port_bridge_getlink,
2007         .ndo_bridge_dellink     = switchdev_port_bridge_dellink,
2008         .ndo_fdb_add            = switchdev_port_fdb_add,
2009         .ndo_fdb_del            = switchdev_port_fdb_del,
2010         .ndo_fdb_dump           = switchdev_port_fdb_dump,
2011         .ndo_features_check     = passthru_features_check,
2012 };
2013
2014 /***********************
2015  * ethtool interface
2016  ***********************/
2017
2018 static void team_ethtool_get_drvinfo(struct net_device *dev,
2019                                      struct ethtool_drvinfo *drvinfo)
2020 {
2021         strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2022         strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2023 }
2024
2025 static const struct ethtool_ops team_ethtool_ops = {
2026         .get_drvinfo            = team_ethtool_get_drvinfo,
2027         .get_link               = ethtool_op_get_link,
2028 };
2029
2030 /***********************
2031  * rt netlink interface
2032  ***********************/
2033
2034 static void team_setup_by_port(struct net_device *dev,
2035                                struct net_device *port_dev)
2036 {
2037         dev->header_ops = port_dev->header_ops;
2038         dev->type = port_dev->type;
2039         dev->hard_header_len = port_dev->hard_header_len;
2040         dev->addr_len = port_dev->addr_len;
2041         dev->mtu = port_dev->mtu;
2042         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2043         eth_hw_addr_inherit(dev, port_dev);
2044 }
2045
2046 static int team_dev_type_check_change(struct net_device *dev,
2047                                       struct net_device *port_dev)
2048 {
2049         struct team *team = netdev_priv(dev);
2050         char *portname = port_dev->name;
2051         int err;
2052
2053         if (dev->type == port_dev->type)
2054                 return 0;
2055         if (!list_empty(&team->port_list)) {
2056                 netdev_err(dev, "Device %s is of different type\n", portname);
2057                 return -EBUSY;
2058         }
2059         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2060         err = notifier_to_errno(err);
2061         if (err) {
2062                 netdev_err(dev, "Refused to change device type\n");
2063                 return err;
2064         }
2065         dev_uc_flush(dev);
2066         dev_mc_flush(dev);
2067         team_setup_by_port(dev, port_dev);
2068         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2069         return 0;
2070 }
2071
2072 static void team_setup(struct net_device *dev)
2073 {
2074         ether_setup(dev);
2075
2076         dev->netdev_ops = &team_netdev_ops;
2077         dev->ethtool_ops = &team_ethtool_ops;
2078         dev->destructor = team_destructor;
2079         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2080         dev->priv_flags |= IFF_NO_QUEUE;
2081         dev->priv_flags |= IFF_TEAM;
2082
2083         /*
2084          * Indicate we support unicast address filtering. That way core won't
2085          * bring us to promisc mode in case a unicast addr is added.
2086          * Let this up to underlay drivers.
2087          */
2088         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2089
2090         dev->features |= NETIF_F_LLTX;
2091         dev->features |= NETIF_F_GRO;
2092
2093         /* Don't allow team devices to change network namespaces. */
2094         dev->features |= NETIF_F_NETNS_LOCAL;
2095
2096         dev->hw_features = TEAM_VLAN_FEATURES |
2097                            NETIF_F_HW_VLAN_CTAG_TX |
2098                            NETIF_F_HW_VLAN_CTAG_RX |
2099                            NETIF_F_HW_VLAN_CTAG_FILTER;
2100
2101         dev->hw_features |= NETIF_F_GSO_ENCAP_ALL;
2102         dev->features |= dev->hw_features;
2103 }
2104
2105 static int team_newlink(struct net *src_net, struct net_device *dev,
2106                         struct nlattr *tb[], struct nlattr *data[])
2107 {
2108         if (tb[IFLA_ADDRESS] == NULL)
2109                 eth_hw_addr_random(dev);
2110
2111         return register_netdevice(dev);
2112 }
2113
2114 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
2115 {
2116         if (tb[IFLA_ADDRESS]) {
2117                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2118                         return -EINVAL;
2119                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2120                         return -EADDRNOTAVAIL;
2121         }
2122         return 0;
2123 }
2124
2125 static unsigned int team_get_num_tx_queues(void)
2126 {
2127         return TEAM_DEFAULT_NUM_TX_QUEUES;
2128 }
2129
2130 static unsigned int team_get_num_rx_queues(void)
2131 {
2132         return TEAM_DEFAULT_NUM_RX_QUEUES;
2133 }
2134
2135 static struct rtnl_link_ops team_link_ops __read_mostly = {
2136         .kind                   = DRV_NAME,
2137         .priv_size              = sizeof(struct team),
2138         .setup                  = team_setup,
2139         .newlink                = team_newlink,
2140         .validate               = team_validate,
2141         .get_num_tx_queues      = team_get_num_tx_queues,
2142         .get_num_rx_queues      = team_get_num_rx_queues,
2143 };
2144
2145
2146 /***********************************
2147  * Generic netlink custom interface
2148  ***********************************/
2149
2150 static struct genl_family team_nl_family;
2151
2152 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2153         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
2154         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
2155         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
2156         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
2157 };
2158
2159 static const struct nla_policy
2160 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2161         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
2162         [TEAM_ATTR_OPTION_NAME] = {
2163                 .type = NLA_STRING,
2164                 .len = TEAM_STRING_MAX_LEN,
2165         },
2166         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
2167         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
2168         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
2169 };
2170
2171 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2172 {
2173         struct sk_buff *msg;
2174         void *hdr;
2175         int err;
2176
2177         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2178         if (!msg)
2179                 return -ENOMEM;
2180
2181         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2182                           &team_nl_family, 0, TEAM_CMD_NOOP);
2183         if (!hdr) {
2184                 err = -EMSGSIZE;
2185                 goto err_msg_put;
2186         }
2187
2188         genlmsg_end(msg, hdr);
2189
2190         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2191
2192 err_msg_put:
2193         nlmsg_free(msg);
2194
2195         return err;
2196 }
2197
2198 /*
2199  * Netlink cmd functions should be locked by following two functions.
2200  * Since dev gets held here, that ensures dev won't disappear in between.
2201  */
2202 static struct team *team_nl_team_get(struct genl_info *info)
2203 {
2204         struct net *net = genl_info_net(info);
2205         int ifindex;
2206         struct net_device *dev;
2207         struct team *team;
2208
2209         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2210                 return NULL;
2211
2212         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2213         dev = dev_get_by_index(net, ifindex);
2214         if (!dev || dev->netdev_ops != &team_netdev_ops) {
2215                 if (dev)
2216                         dev_put(dev);
2217                 return NULL;
2218         }
2219
2220         team = netdev_priv(dev);
2221         mutex_lock(&team->lock);
2222         return team;
2223 }
2224
2225 static void team_nl_team_put(struct team *team)
2226 {
2227         mutex_unlock(&team->lock);
2228         dev_put(team->dev);
2229 }
2230
2231 typedef int team_nl_send_func_t(struct sk_buff *skb,
2232                                 struct team *team, u32 portid);
2233
2234 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2235 {
2236         return genlmsg_unicast(dev_net(team->dev), skb, portid);
2237 }
2238
2239 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2240                                        struct team_option_inst *opt_inst)
2241 {
2242         struct nlattr *option_item;
2243         struct team_option *option = opt_inst->option;
2244         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2245         struct team_gsetter_ctx ctx;
2246         int err;
2247
2248         ctx.info = opt_inst_info;
2249         err = team_option_get(team, opt_inst, &ctx);
2250         if (err)
2251                 return err;
2252
2253         option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2254         if (!option_item)
2255                 return -EMSGSIZE;
2256
2257         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2258                 goto nest_cancel;
2259         if (opt_inst_info->port &&
2260             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2261                         opt_inst_info->port->dev->ifindex))
2262                 goto nest_cancel;
2263         if (opt_inst->option->array_size &&
2264             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2265                         opt_inst_info->array_index))
2266                 goto nest_cancel;
2267
2268         switch (option->type) {
2269         case TEAM_OPTION_TYPE_U32:
2270                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2271                         goto nest_cancel;
2272                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2273                         goto nest_cancel;
2274                 break;
2275         case TEAM_OPTION_TYPE_STRING:
2276                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2277                         goto nest_cancel;
2278                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2279                                    ctx.data.str_val))
2280                         goto nest_cancel;
2281                 break;
2282         case TEAM_OPTION_TYPE_BINARY:
2283                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2284                         goto nest_cancel;
2285                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2286                             ctx.data.bin_val.ptr))
2287                         goto nest_cancel;
2288                 break;
2289         case TEAM_OPTION_TYPE_BOOL:
2290                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2291                         goto nest_cancel;
2292                 if (ctx.data.bool_val &&
2293                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2294                         goto nest_cancel;
2295                 break;
2296         case TEAM_OPTION_TYPE_S32:
2297                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2298                         goto nest_cancel;
2299                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2300                         goto nest_cancel;
2301                 break;
2302         default:
2303                 BUG();
2304         }
2305         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2306                 goto nest_cancel;
2307         if (opt_inst->changed) {
2308                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2309                         goto nest_cancel;
2310                 opt_inst->changed = false;
2311         }
2312         nla_nest_end(skb, option_item);
2313         return 0;
2314
2315 nest_cancel:
2316         nla_nest_cancel(skb, option_item);
2317         return -EMSGSIZE;
2318 }
2319
2320 static int __send_and_alloc_skb(struct sk_buff **pskb,
2321                                 struct team *team, u32 portid,
2322                                 team_nl_send_func_t *send_func)
2323 {
2324         int err;
2325
2326         if (*pskb) {
2327                 err = send_func(*pskb, team, portid);
2328                 if (err)
2329                         return err;
2330         }
2331         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2332         if (!*pskb)
2333                 return -ENOMEM;
2334         return 0;
2335 }
2336
2337 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2338                                     int flags, team_nl_send_func_t *send_func,
2339                                     struct list_head *sel_opt_inst_list)
2340 {
2341         struct nlattr *option_list;
2342         struct nlmsghdr *nlh;
2343         void *hdr;
2344         struct team_option_inst *opt_inst;
2345         int err;
2346         struct sk_buff *skb = NULL;
2347         bool incomplete;
2348         int i;
2349
2350         opt_inst = list_first_entry(sel_opt_inst_list,
2351                                     struct team_option_inst, tmp_list);
2352
2353 start_again:
2354         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2355         if (err)
2356                 return err;
2357
2358         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2359                           TEAM_CMD_OPTIONS_GET);
2360         if (!hdr)
2361                 return -EMSGSIZE;
2362
2363         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2364                 goto nla_put_failure;
2365         option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2366         if (!option_list)
2367                 goto nla_put_failure;
2368
2369         i = 0;
2370         incomplete = false;
2371         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2372                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2373                 if (err) {
2374                         if (err == -EMSGSIZE) {
2375                                 if (!i)
2376                                         goto errout;
2377                                 incomplete = true;
2378                                 break;
2379                         }
2380                         goto errout;
2381                 }
2382                 i++;
2383         }
2384
2385         nla_nest_end(skb, option_list);
2386         genlmsg_end(skb, hdr);
2387         if (incomplete)
2388                 goto start_again;
2389
2390 send_done:
2391         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2392         if (!nlh) {
2393                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2394                 if (err)
2395                         goto errout;
2396                 goto send_done;
2397         }
2398
2399         return send_func(skb, team, portid);
2400
2401 nla_put_failure:
2402         err = -EMSGSIZE;
2403 errout:
2404         genlmsg_cancel(skb, hdr);
2405         nlmsg_free(skb);
2406         return err;
2407 }
2408
2409 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2410 {
2411         struct team *team;
2412         struct team_option_inst *opt_inst;
2413         int err;
2414         LIST_HEAD(sel_opt_inst_list);
2415
2416         team = team_nl_team_get(info);
2417         if (!team)
2418                 return -EINVAL;
2419
2420         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2421                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2422         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2423                                        NLM_F_ACK, team_nl_send_unicast,
2424                                        &sel_opt_inst_list);
2425
2426         team_nl_team_put(team);
2427
2428         return err;
2429 }
2430
2431 static int team_nl_send_event_options_get(struct team *team,
2432                                           struct list_head *sel_opt_inst_list);
2433
2434 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2435 {
2436         struct team *team;
2437         int err = 0;
2438         int i;
2439         struct nlattr *nl_option;
2440         LIST_HEAD(opt_inst_list);
2441
2442         rtnl_lock();
2443
2444         team = team_nl_team_get(info);
2445         if (!team) {
2446                 err = -EINVAL;
2447                 goto rtnl_unlock;
2448         }
2449
2450         err = -EINVAL;
2451         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2452                 err = -EINVAL;
2453                 goto team_put;
2454         }
2455
2456         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2457                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2458                 struct nlattr *attr;
2459                 struct nlattr *attr_data;
2460                 enum team_option_type opt_type;
2461                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2462                 u32 opt_array_index = 0;
2463                 bool opt_is_array = false;
2464                 struct team_option_inst *opt_inst;
2465                 char *opt_name;
2466                 bool opt_found = false;
2467
2468                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2469                         err = -EINVAL;
2470                         goto team_put;
2471                 }
2472                 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2473                                        nl_option, team_nl_option_policy);
2474                 if (err)
2475                         goto team_put;
2476                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2477                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2478                         err = -EINVAL;
2479                         goto team_put;
2480                 }
2481                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2482                 case NLA_U32:
2483                         opt_type = TEAM_OPTION_TYPE_U32;
2484                         break;
2485                 case NLA_STRING:
2486                         opt_type = TEAM_OPTION_TYPE_STRING;
2487                         break;
2488                 case NLA_BINARY:
2489                         opt_type = TEAM_OPTION_TYPE_BINARY;
2490                         break;
2491                 case NLA_FLAG:
2492                         opt_type = TEAM_OPTION_TYPE_BOOL;
2493                         break;
2494                 case NLA_S32:
2495                         opt_type = TEAM_OPTION_TYPE_S32;
2496                         break;
2497                 default:
2498                         goto team_put;
2499                 }
2500
2501                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2502                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2503                         err = -EINVAL;
2504                         goto team_put;
2505                 }
2506
2507                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2508                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2509                 if (attr)
2510                         opt_port_ifindex = nla_get_u32(attr);
2511
2512                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2513                 if (attr) {
2514                         opt_is_array = true;
2515                         opt_array_index = nla_get_u32(attr);
2516                 }
2517
2518                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2519                         struct team_option *option = opt_inst->option;
2520                         struct team_gsetter_ctx ctx;
2521                         struct team_option_inst_info *opt_inst_info;
2522                         int tmp_ifindex;
2523
2524                         opt_inst_info = &opt_inst->info;
2525                         tmp_ifindex = opt_inst_info->port ?
2526                                       opt_inst_info->port->dev->ifindex : 0;
2527                         if (option->type != opt_type ||
2528                             strcmp(option->name, opt_name) ||
2529                             tmp_ifindex != opt_port_ifindex ||
2530                             (option->array_size && !opt_is_array) ||
2531                             opt_inst_info->array_index != opt_array_index)
2532                                 continue;
2533                         opt_found = true;
2534                         ctx.info = opt_inst_info;
2535                         switch (opt_type) {
2536                         case TEAM_OPTION_TYPE_U32:
2537                                 ctx.data.u32_val = nla_get_u32(attr_data);
2538                                 break;
2539                         case TEAM_OPTION_TYPE_STRING:
2540                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2541                                         err = -EINVAL;
2542                                         goto team_put;
2543                                 }
2544                                 ctx.data.str_val = nla_data(attr_data);
2545                                 break;
2546                         case TEAM_OPTION_TYPE_BINARY:
2547                                 ctx.data.bin_val.len = nla_len(attr_data);
2548                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2549                                 break;
2550                         case TEAM_OPTION_TYPE_BOOL:
2551                                 ctx.data.bool_val = attr_data ? true : false;
2552                                 break;
2553                         case TEAM_OPTION_TYPE_S32:
2554                                 ctx.data.s32_val = nla_get_s32(attr_data);
2555                                 break;
2556                         default:
2557                                 BUG();
2558                         }
2559                         err = team_option_set(team, opt_inst, &ctx);
2560                         if (err)
2561                                 goto team_put;
2562                         opt_inst->changed = true;
2563                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2564                 }
2565                 if (!opt_found) {
2566                         err = -ENOENT;
2567                         goto team_put;
2568                 }
2569         }
2570
2571         err = team_nl_send_event_options_get(team, &opt_inst_list);
2572
2573 team_put:
2574         team_nl_team_put(team);
2575 rtnl_unlock:
2576         rtnl_unlock();
2577         return err;
2578 }
2579
2580 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2581                                      struct team_port *port)
2582 {
2583         struct nlattr *port_item;
2584
2585         port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2586         if (!port_item)
2587                 goto nest_cancel;
2588         if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2589                 goto nest_cancel;
2590         if (port->changed) {
2591                 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2592                         goto nest_cancel;
2593                 port->changed = false;
2594         }
2595         if ((port->removed &&
2596              nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2597             (port->state.linkup &&
2598              nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2599             nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2600             nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2601                 goto nest_cancel;
2602         nla_nest_end(skb, port_item);
2603         return 0;
2604
2605 nest_cancel:
2606         nla_nest_cancel(skb, port_item);
2607         return -EMSGSIZE;
2608 }
2609
2610 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2611                                       int flags, team_nl_send_func_t *send_func,
2612                                       struct team_port *one_port)
2613 {
2614         struct nlattr *port_list;
2615         struct nlmsghdr *nlh;
2616         void *hdr;
2617         struct team_port *port;
2618         int err;
2619         struct sk_buff *skb = NULL;
2620         bool incomplete;
2621         int i;
2622
2623         port = list_first_entry_or_null(&team->port_list,
2624                                         struct team_port, list);
2625
2626 start_again:
2627         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2628         if (err)
2629                 return err;
2630
2631         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2632                           TEAM_CMD_PORT_LIST_GET);
2633         if (!hdr)
2634                 return -EMSGSIZE;
2635
2636         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2637                 goto nla_put_failure;
2638         port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2639         if (!port_list)
2640                 goto nla_put_failure;
2641
2642         i = 0;
2643         incomplete = false;
2644
2645         /* If one port is selected, called wants to send port list containing
2646          * only this port. Otherwise go through all listed ports and send all
2647          */
2648         if (one_port) {
2649                 err = team_nl_fill_one_port_get(skb, one_port);
2650                 if (err)
2651                         goto errout;
2652         } else if (port) {
2653                 list_for_each_entry_from(port, &team->port_list, list) {
2654                         err = team_nl_fill_one_port_get(skb, port);
2655                         if (err) {
2656                                 if (err == -EMSGSIZE) {
2657                                         if (!i)
2658                                                 goto errout;
2659                                         incomplete = true;
2660                                         break;
2661                                 }
2662                                 goto errout;
2663                         }
2664                         i++;
2665                 }
2666         }
2667
2668         nla_nest_end(skb, port_list);
2669         genlmsg_end(skb, hdr);
2670         if (incomplete)
2671                 goto start_again;
2672
2673 send_done:
2674         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2675         if (!nlh) {
2676                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2677                 if (err)
2678                         goto errout;
2679                 goto send_done;
2680         }
2681
2682         return send_func(skb, team, portid);
2683
2684 nla_put_failure:
2685         err = -EMSGSIZE;
2686 errout:
2687         genlmsg_cancel(skb, hdr);
2688         nlmsg_free(skb);
2689         return err;
2690 }
2691
2692 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2693                                      struct genl_info *info)
2694 {
2695         struct team *team;
2696         int err;
2697
2698         team = team_nl_team_get(info);
2699         if (!team)
2700                 return -EINVAL;
2701
2702         err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2703                                          NLM_F_ACK, team_nl_send_unicast, NULL);
2704
2705         team_nl_team_put(team);
2706
2707         return err;
2708 }
2709
2710 static const struct genl_ops team_nl_ops[] = {
2711         {
2712                 .cmd = TEAM_CMD_NOOP,
2713                 .doit = team_nl_cmd_noop,
2714                 .policy = team_nl_policy,
2715         },
2716         {
2717                 .cmd = TEAM_CMD_OPTIONS_SET,
2718                 .doit = team_nl_cmd_options_set,
2719                 .policy = team_nl_policy,
2720                 .flags = GENL_ADMIN_PERM,
2721         },
2722         {
2723                 .cmd = TEAM_CMD_OPTIONS_GET,
2724                 .doit = team_nl_cmd_options_get,
2725                 .policy = team_nl_policy,
2726                 .flags = GENL_ADMIN_PERM,
2727         },
2728         {
2729                 .cmd = TEAM_CMD_PORT_LIST_GET,
2730                 .doit = team_nl_cmd_port_list_get,
2731                 .policy = team_nl_policy,
2732                 .flags = GENL_ADMIN_PERM,
2733         },
2734 };
2735
2736 static const struct genl_multicast_group team_nl_mcgrps[] = {
2737         { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2738 };
2739
2740 static struct genl_family team_nl_family __ro_after_init = {
2741         .name           = TEAM_GENL_NAME,
2742         .version        = TEAM_GENL_VERSION,
2743         .maxattr        = TEAM_ATTR_MAX,
2744         .netnsok        = true,
2745         .module         = THIS_MODULE,
2746         .ops            = team_nl_ops,
2747         .n_ops          = ARRAY_SIZE(team_nl_ops),
2748         .mcgrps         = team_nl_mcgrps,
2749         .n_mcgrps       = ARRAY_SIZE(team_nl_mcgrps),
2750 };
2751
2752 static int team_nl_send_multicast(struct sk_buff *skb,
2753                                   struct team *team, u32 portid)
2754 {
2755         return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2756                                        skb, 0, 0, GFP_KERNEL);
2757 }
2758
2759 static int team_nl_send_event_options_get(struct team *team,
2760                                           struct list_head *sel_opt_inst_list)
2761 {
2762         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2763                                         sel_opt_inst_list);
2764 }
2765
2766 static int team_nl_send_event_port_get(struct team *team,
2767                                        struct team_port *port)
2768 {
2769         return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2770                                           port);
2771 }
2772
2773 static int __init team_nl_init(void)
2774 {
2775         return genl_register_family(&team_nl_family);
2776 }
2777
2778 static void team_nl_fini(void)
2779 {
2780         genl_unregister_family(&team_nl_family);
2781 }
2782
2783
2784 /******************
2785  * Change checkers
2786  ******************/
2787
2788 static void __team_options_change_check(struct team *team)
2789 {
2790         int err;
2791         struct team_option_inst *opt_inst;
2792         LIST_HEAD(sel_opt_inst_list);
2793
2794         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2795                 if (opt_inst->changed)
2796                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2797         }
2798         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2799         if (err && err != -ESRCH)
2800                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2801                             err);
2802 }
2803
2804 /* rtnl lock is held */
2805
2806 static void __team_port_change_send(struct team_port *port, bool linkup)
2807 {
2808         int err;
2809
2810         port->changed = true;
2811         port->state.linkup = linkup;
2812         team_refresh_port_linkup(port);
2813         if (linkup) {
2814                 struct ethtool_link_ksettings ecmd;
2815
2816                 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2817                 if (!err) {
2818                         port->state.speed = ecmd.base.speed;
2819                         port->state.duplex = ecmd.base.duplex;
2820                         goto send_event;
2821                 }
2822         }
2823         port->state.speed = 0;
2824         port->state.duplex = 0;
2825
2826 send_event:
2827         err = team_nl_send_event_port_get(port->team, port);
2828         if (err && err != -ESRCH)
2829                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2830                             port->dev->name, err);
2831
2832 }
2833
2834 static void __team_carrier_check(struct team *team)
2835 {
2836         struct team_port *port;
2837         bool team_linkup;
2838
2839         if (team->user_carrier_enabled)
2840                 return;
2841
2842         team_linkup = false;
2843         list_for_each_entry(port, &team->port_list, list) {
2844                 if (port->linkup) {
2845                         team_linkup = true;
2846                         break;
2847                 }
2848         }
2849
2850         if (team_linkup)
2851                 netif_carrier_on(team->dev);
2852         else
2853                 netif_carrier_off(team->dev);
2854 }
2855
2856 static void __team_port_change_check(struct team_port *port, bool linkup)
2857 {
2858         if (port->state.linkup != linkup)
2859                 __team_port_change_send(port, linkup);
2860         __team_carrier_check(port->team);
2861 }
2862
2863 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2864 {
2865         __team_port_change_send(port, linkup);
2866         __team_carrier_check(port->team);
2867 }
2868
2869 static void __team_port_change_port_removed(struct team_port *port)
2870 {
2871         port->removed = true;
2872         __team_port_change_send(port, false);
2873         __team_carrier_check(port->team);
2874 }
2875
2876 static void team_port_change_check(struct team_port *port, bool linkup)
2877 {
2878         struct team *team = port->team;
2879
2880         mutex_lock(&team->lock);
2881         __team_port_change_check(port, linkup);
2882         mutex_unlock(&team->lock);
2883 }
2884
2885
2886 /************************************
2887  * Net device notifier event handler
2888  ************************************/
2889
2890 static int team_device_event(struct notifier_block *unused,
2891                              unsigned long event, void *ptr)
2892 {
2893         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2894         struct team_port *port;
2895
2896         port = team_port_get_rtnl(dev);
2897         if (!port)
2898                 return NOTIFY_DONE;
2899
2900         switch (event) {
2901         case NETDEV_UP:
2902                 if (netif_carrier_ok(dev))
2903                         team_port_change_check(port, true);
2904                 break;
2905         case NETDEV_DOWN:
2906                 team_port_change_check(port, false);
2907                 break;
2908         case NETDEV_CHANGE:
2909                 if (netif_running(port->dev))
2910                         team_port_change_check(port,
2911                                                !!netif_carrier_ok(port->dev));
2912                 break;
2913         case NETDEV_UNREGISTER:
2914                 team_del_slave(port->team->dev, dev);
2915                 break;
2916         case NETDEV_FEAT_CHANGE:
2917                 team_compute_features(port->team);
2918                 break;
2919         case NETDEV_PRECHANGEMTU:
2920                 /* Forbid to change mtu of underlaying device */
2921                 if (!port->team->port_mtu_change_allowed)
2922                         return NOTIFY_BAD;
2923                 break;
2924         case NETDEV_PRE_TYPE_CHANGE:
2925                 /* Forbid to change type of underlaying device */
2926                 return NOTIFY_BAD;
2927         case NETDEV_RESEND_IGMP:
2928                 /* Propagate to master device */
2929                 call_netdevice_notifiers(event, port->team->dev);
2930                 break;
2931         }
2932         return NOTIFY_DONE;
2933 }
2934
2935 static struct notifier_block team_notifier_block __read_mostly = {
2936         .notifier_call = team_device_event,
2937 };
2938
2939
2940 /***********************
2941  * Module init and exit
2942  ***********************/
2943
2944 static int __init team_module_init(void)
2945 {
2946         int err;
2947
2948         register_netdevice_notifier(&team_notifier_block);
2949
2950         err = rtnl_link_register(&team_link_ops);
2951         if (err)
2952                 goto err_rtnl_reg;
2953
2954         err = team_nl_init();
2955         if (err)
2956                 goto err_nl_init;
2957
2958         return 0;
2959
2960 err_nl_init:
2961         rtnl_link_unregister(&team_link_ops);
2962
2963 err_rtnl_reg:
2964         unregister_netdevice_notifier(&team_notifier_block);
2965
2966         return err;
2967 }
2968
2969 static void __exit team_module_exit(void)
2970 {
2971         team_nl_fini();
2972         rtnl_link_unregister(&team_link_ops);
2973         unregister_netdevice_notifier(&team_notifier_block);
2974 }
2975
2976 module_init(team_module_init);
2977 module_exit(team_module_exit);
2978
2979 MODULE_LICENSE("GPL v2");
2980 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2981 MODULE_DESCRIPTION("Ethernet team device driver");
2982 MODULE_ALIAS_RTNL_LINK(DRV_NAME);