drivers/net/team/team.c

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