drivers/net/team/team.c

   1 /*
   2  * drivers/net/team/team.c - Network team device driver
   3  * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/types.h>
  13 #include <linux/module.h>
  14 #include <linux/init.h>
  15 #include <linux/slab.h>
  16 #include <linux/rcupdate.h>
  17 #include <linux/errno.h>
  18 #include <linux/ctype.h>
  19 #include <linux/notifier.h>
  20 #include <linux/netdevice.h>
  21 #include <linux/netpoll.h>
  22 #include <linux/if_vlan.h>
  23 #include <linux/if_arp.h>
  24 #include <linux/socket.h>
  25 #include <linux/etherdevice.h>
  26 #include <linux/rtnetlink.h>
  27 #include <net/rtnetlink.h>
  28 #include <net/genetlink.h>
  29 #include <net/netlink.h>
  30 #include <net/sch_generic.h>
  31 #include <net/switchdev.h>
  32 #include <generated/utsrelease.h>
  33 #include <linux/if_team.h>
  34
  35 #define DRV_NAME "team"
  36
  37
  38 /**********
  39  * Helpers
  40  **********/
  41
  42 #define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT)
  43
  44 static struct team_port *team_port_get_rcu(const struct net_device *dev)
  45 {
  46         struct team_port *port = rcu_dereference(dev->rx_handler_data);
  47
  48         return team_port_exists(dev) ? port : NULL;
  49 }
  50
  51 static struct team_port *team_port_get_rtnl(const struct net_device *dev)
  52 {
  53         struct team_port *port = rtnl_dereference(dev->rx_handler_data);
  54
  55         return team_port_exists(dev) ? port : NULL;
  56 }
  57
  58 /*
  59  * Since the ability to change device address for open port device is tested in
  60  * team_port_add, this function can be called without control of return value
  61  */
  62 static int __set_port_dev_addr(struct net_device *port_dev,
  63                                const unsigned char *dev_addr)
  64 {
  65         struct sockaddr addr;
  66
  67         memcpy(addr.sa_data, dev_addr, port_dev->addr_len);
  68         addr.sa_family = port_dev->type;
  69         return dev_set_mac_address(port_dev, &addr);
  70 }
  71
  72 static int team_port_set_orig_dev_addr(struct team_port *port)
  73 {
  74         return __set_port_dev_addr(port->dev, port->orig.dev_addr);
  75 }
  76
  77 static int team_port_set_team_dev_addr(struct team *team,
  78                                        struct team_port *port)
  79 {
  80         return __set_port_dev_addr(port->dev, team->dev->dev_addr);
  81 }
  82
  83 int team_modeop_port_enter(struct team *team, struct team_port *port)
  84 {
  85         return team_port_set_team_dev_addr(team, port);
  86 }
  87 EXPORT_SYMBOL(team_modeop_port_enter);
  88
  89 void team_modeop_port_change_dev_addr(struct team *team,
  90                                       struct team_port *port)
  91 {
  92         team_port_set_team_dev_addr(team, port);
  93 }
  94 EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
  95
  96 static void team_refresh_port_linkup(struct team_port *port)
  97 {
  98         port->linkup = port->user.linkup_enabled ? port->user.linkup :
  99                                                    port->state.linkup;
 100 }
 101
 102
 103 /*******************
 104  * Options handling
 105  *******************/
 106
 107 struct team_option_inst { /* One for each option instance */
 108         struct list_head list;
 109         struct list_head tmp_list;
 110         struct team_option *option;
 111         struct team_option_inst_info info;
 112         bool changed;
 113         bool removed;
 114 };
 115
 116 static struct team_option *__team_find_option(struct team *team,
 117                                               const char *opt_name)
 118 {
 119         struct team_option *option;
 120
 121         list_for_each_entry(option, &team->option_list, list) {
 122                 if (strcmp(option->name, opt_name) == 0)
 123                         return option;
 124         }
 125         return NULL;
 126 }
 127
 128 static void __team_option_inst_del(struct team_option_inst *opt_inst)
 129 {
 130         list_del(&opt_inst->list);
 131         kfree(opt_inst);
 132 }
 133
 134 static void __team_option_inst_del_option(struct team *team,
 135                                           struct team_option *option)
 136 {
 137         struct team_option_inst *opt_inst, *tmp;
 138
 139         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 140                 if (opt_inst->option == option)
 141                         __team_option_inst_del(opt_inst);
 142         }
 143 }
 144
 145 static int __team_option_inst_add(struct team *team, struct team_option *option,
 146                                   struct team_port *port)
 147 {
 148         struct team_option_inst *opt_inst;
 149         unsigned int array_size;
 150         unsigned int i;
 151         int err;
 152
 153         array_size = option->array_size;
 154         if (!array_size)
 155                 array_size = 1; /* No array but still need one instance */
 156
 157         for (i = 0; i < array_size; i++) {
 158                 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
 159                 if (!opt_inst)
 160                         return -ENOMEM;
 161                 opt_inst->option = option;
 162                 opt_inst->info.port = port;
 163                 opt_inst->info.array_index = i;
 164                 opt_inst->changed = true;
 165                 opt_inst->removed = false;
 166                 list_add_tail(&opt_inst->list, &team->option_inst_list);
 167                 if (option->init) {
 168                         err = option->init(team, &opt_inst->info);
 169                         if (err)
 170                                 return err;
 171                 }
 172
 173         }
 174         return 0;
 175 }
 176
 177 static int __team_option_inst_add_option(struct team *team,
 178                                          struct team_option *option)
 179 {
 180         int err;
 181
 182         if (!option->per_port) {
 183                 err = __team_option_inst_add(team, option, NULL);
 184                 if (err)
 185                         goto inst_del_option;
 186         }
 187         return 0;
 188
 189 inst_del_option:
 190         __team_option_inst_del_option(team, option);
 191         return err;
 192 }
 193
 194 static void __team_option_inst_mark_removed_option(struct team *team,
 195                                                    struct team_option *option)
 196 {
 197         struct team_option_inst *opt_inst;
 198
 199         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 200                 if (opt_inst->option == option) {
 201                         opt_inst->changed = true;
 202                         opt_inst->removed = true;
 203                 }
 204         }
 205 }
 206
 207 static void __team_option_inst_del_port(struct team *team,
 208                                         struct team_port *port)
 209 {
 210         struct team_option_inst *opt_inst, *tmp;
 211
 212         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 213                 if (opt_inst->option->per_port &&
 214                     opt_inst->info.port == port)
 215                         __team_option_inst_del(opt_inst);
 216         }
 217 }
 218
 219 static int __team_option_inst_add_port(struct team *team,
 220                                        struct team_port *port)
 221 {
 222         struct team_option *option;
 223         int err;
 224
 225         list_for_each_entry(option, &team->option_list, list) {
 226                 if (!option->per_port)
 227                         continue;
 228                 err = __team_option_inst_add(team, option, port);
 229                 if (err)
 230                         goto inst_del_port;
 231         }
 232         return 0;
 233
 234 inst_del_port:
 235         __team_option_inst_del_port(team, port);
 236         return err;
 237 }
 238
 239 static void __team_option_inst_mark_removed_port(struct team *team,
 240                                                  struct team_port *port)
 241 {
 242         struct team_option_inst *opt_inst;
 243
 244         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 245                 if (opt_inst->info.port == port) {
 246                         opt_inst->changed = true;
 247                         opt_inst->removed = true;
 248                 }
 249         }
 250 }
 251
 252 static int __team_options_register(struct team *team,
 253                                    const struct team_option *option,
 254                                    size_t option_count)
 255 {
 256         int i;
 257         struct team_option **dst_opts;
 258         int err;
 259
 260         dst_opts = kzalloc(sizeof(struct team_option *) * option_count,
 261                            GFP_KERNEL);
 262         if (!dst_opts)
 263                 return -ENOMEM;
 264         for (i = 0; i < option_count; i++, option++) {
 265                 if (__team_find_option(team, option->name)) {
 266                         err = -EEXIST;
 267                         goto alloc_rollback;
 268                 }
 269                 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
 270                 if (!dst_opts[i]) {
 271                         err = -ENOMEM;
 272                         goto alloc_rollback;
 273                 }
 274         }
 275
 276         for (i = 0; i < option_count; i++) {
 277                 err = __team_option_inst_add_option(team, dst_opts[i]);
 278                 if (err)
 279                         goto inst_rollback;
 280                 list_add_tail(&dst_opts[i]->list, &team->option_list);
 281         }
 282
 283         kfree(dst_opts);
 284         return 0;
 285
 286 inst_rollback:
 287         for (i--; i >= 0; i--)
 288                 __team_option_inst_del_option(team, dst_opts[i]);
 289
 290         i = option_count - 1;
 291 alloc_rollback:
 292         for (i--; i >= 0; i--)
 293                 kfree(dst_opts[i]);
 294
 295         kfree(dst_opts);
 296         return err;
 297 }
 298
 299 static void __team_options_mark_removed(struct team *team,
 300                                         const struct team_option *option,
 301                                         size_t option_count)
 302 {
 303         int i;
 304
 305         for (i = 0; i < option_count; i++, option++) {
 306                 struct team_option *del_opt;
 307
 308                 del_opt = __team_find_option(team, option->name);
 309                 if (del_opt)
 310                         __team_option_inst_mark_removed_option(team, del_opt);
 311         }
 312 }
 313
 314 static void __team_options_unregister(struct team *team,
 315                                       const struct team_option *option,
 316                                       size_t option_count)
 317 {
 318         int i;
 319
 320         for (i = 0; i < option_count; i++, option++) {
 321                 struct team_option *del_opt;
 322
 323                 del_opt = __team_find_option(team, option->name);
 324                 if (del_opt) {
 325                         __team_option_inst_del_option(team, del_opt);
 326                         list_del(&del_opt->list);
 327                         kfree(del_opt);
 328                 }
 329         }
 330 }
 331
 332 static void __team_options_change_check(struct team *team);
 333
 334 int team_options_register(struct team *team,
 335                           const struct team_option *option,
 336                           size_t option_count)
 337 {
 338         int err;
 339
 340         err = __team_options_register(team, option, option_count);
 341         if (err)
 342                 return err;
 343         __team_options_change_check(team);
 344         return 0;
 345 }
 346 EXPORT_SYMBOL(team_options_register);
 347
 348 void team_options_unregister(struct team *team,
 349                              const struct team_option *option,
 350                              size_t option_count)
 351 {
 352         __team_options_mark_removed(team, option, option_count);
 353         __team_options_change_check(team);
 354         __team_options_unregister(team, option, option_count);
 355 }
 356 EXPORT_SYMBOL(team_options_unregister);
 357
 358 static int team_option_get(struct team *team,
 359                            struct team_option_inst *opt_inst,
 360                            struct team_gsetter_ctx *ctx)
 361 {
 362         if (!opt_inst->option->getter)
 363                 return -EOPNOTSUPP;
 364         return opt_inst->option->getter(team, ctx);
 365 }
 366
 367 static int team_option_set(struct team *team,
 368                            struct team_option_inst *opt_inst,
 369                            struct team_gsetter_ctx *ctx)
 370 {
 371         if (!opt_inst->option->setter)
 372                 return -EOPNOTSUPP;
 373         return opt_inst->option->setter(team, ctx);
 374 }
 375
 376 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
 377 {
 378         struct team_option_inst *opt_inst;
 379
 380         opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
 381         opt_inst->changed = true;
 382 }
 383 EXPORT_SYMBOL(team_option_inst_set_change);
 384
 385 void team_options_change_check(struct team *team)
 386 {
 387         __team_options_change_check(team);
 388 }
 389 EXPORT_SYMBOL(team_options_change_check);
 390
 391
 392 /****************
 393  * Mode handling
 394  ****************/
 395
 396 static LIST_HEAD(mode_list);
 397 static DEFINE_SPINLOCK(mode_list_lock);
 398
 399 struct team_mode_item {
 400         struct list_head list;
 401         const struct team_mode *mode;
 402 };
 403
 404 static struct team_mode_item *__find_mode(const char *kind)
 405 {
 406         struct team_mode_item *mitem;
 407
 408         list_for_each_entry(mitem, &mode_list, list) {
 409                 if (strcmp(mitem->mode->kind, kind) == 0)
 410                         return mitem;
 411         }
 412         return NULL;
 413 }
 414
 415 static bool is_good_mode_name(const char *name)
 416 {
 417         while (*name != '\0') {
 418                 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
 419                         return false;
 420                 name++;
 421         }
 422         return true;
 423 }
 424
 425 int team_mode_register(const struct team_mode *mode)
 426 {
 427         int err = 0;
 428         struct team_mode_item *mitem;
 429
 430         if (!is_good_mode_name(mode->kind) ||
 431             mode->priv_size > TEAM_MODE_PRIV_SIZE)
 432                 return -EINVAL;
 433
 434         mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
 435         if (!mitem)
 436                 return -ENOMEM;
 437
 438         spin_lock(&mode_list_lock);
 439         if (__find_mode(mode->kind)) {
 440                 err = -EEXIST;
 441                 kfree(mitem);
 442                 goto unlock;
 443         }
 444         mitem->mode = mode;
 445         list_add_tail(&mitem->list, &mode_list);
 446 unlock:
 447         spin_unlock(&mode_list_lock);
 448         return err;
 449 }
 450 EXPORT_SYMBOL(team_mode_register);
 451
 452 void team_mode_unregister(const struct team_mode *mode)
 453 {
 454         struct team_mode_item *mitem;
 455
 456         spin_lock(&mode_list_lock);
 457         mitem = __find_mode(mode->kind);
 458         if (mitem) {
 459                 list_del_init(&mitem->list);
 460                 kfree(mitem);
 461         }
 462         spin_unlock(&mode_list_lock);
 463 }
 464 EXPORT_SYMBOL(team_mode_unregister);
 465
 466 static const struct team_mode *team_mode_get(const char *kind)
 467 {
 468         struct team_mode_item *mitem;
 469         const struct team_mode *mode = NULL;
 470
 471         spin_lock(&mode_list_lock);
 472         mitem = __find_mode(kind);
 473         if (!mitem) {
 474                 spin_unlock(&mode_list_lock);
 475                 request_module("team-mode-%s", kind);
 476                 spin_lock(&mode_list_lock);
 477                 mitem = __find_mode(kind);
 478         }
 479         if (mitem) {
 480                 mode = mitem->mode;
 481                 if (!try_module_get(mode->owner))
 482                         mode = NULL;
 483         }
 484
 485         spin_unlock(&mode_list_lock);
 486         return mode;
 487 }
 488
 489 static void team_mode_put(const struct team_mode *mode)
 490 {
 491         module_put(mode->owner);
 492 }
 493
 494 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
 495 {
 496         dev_kfree_skb_any(skb);
 497         return false;
 498 }
 499
 500 static rx_handler_result_t team_dummy_receive(struct team *team,
 501                                               struct team_port *port,
 502                                               struct sk_buff *skb)
 503 {
 504         return RX_HANDLER_ANOTHER;
 505 }
 506
 507 static const struct team_mode __team_no_mode = {
 508         .kind           = "*NOMODE*",
 509 };
 510
 511 static bool team_is_mode_set(struct team *team)
 512 {
 513         return team->mode != &__team_no_mode;
 514 }
 515
 516 static void team_set_no_mode(struct team *team)
 517 {
 518         team->user_carrier_enabled = false;
 519         team->mode = &__team_no_mode;
 520 }
 521
 522 static void team_adjust_ops(struct team *team)
 523 {
 524         /*
 525          * To avoid checks in rx/tx skb paths, ensure here that non-null and
 526          * correct ops are always set.
 527          */
 528
 529         if (!team->en_port_count || !team_is_mode_set(team) ||
 530             !team->mode->ops->transmit)
 531                 team->ops.transmit = team_dummy_transmit;
 532         else
 533                 team->ops.transmit = team->mode->ops->transmit;
 534
 535         if (!team->en_port_count || !team_is_mode_set(team) ||
 536             !team->mode->ops->receive)
 537                 team->ops.receive = team_dummy_receive;
 538         else
 539                 team->ops.receive = team->mode->ops->receive;
 540 }
 541
 542 /*
 543  * We can benefit from the fact that it's ensured no port is present
 544  * at the time of mode change. Therefore no packets are in fly so there's no
 545  * need to set mode operations in any special way.
 546  */
 547 static int __team_change_mode(struct team *team,
 548                               const struct team_mode *new_mode)
 549 {
 550         /* Check if mode was previously set and do cleanup if so */
 551         if (team_is_mode_set(team)) {
 552                 void (*exit_op)(struct team *team) = team->ops.exit;
 553
 554                 /* Clear ops area so no callback is called any longer */
 555                 memset(&team->ops, 0, sizeof(struct team_mode_ops));
 556                 team_adjust_ops(team);
 557
 558                 if (exit_op)
 559                         exit_op(team);
 560                 team_mode_put(team->mode);
 561                 team_set_no_mode(team);
 562                 /* zero private data area */
 563                 memset(&team->mode_priv, 0,
 564                        sizeof(struct team) - offsetof(struct team, mode_priv));
 565         }
 566
 567         if (!new_mode)
 568                 return 0;
 569
 570         if (new_mode->ops->init) {
 571                 int err;
 572
 573                 err = new_mode->ops->init(team);
 574                 if (err)
 575                         return err;
 576         }
 577
 578         team->mode = new_mode;
 579         memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
 580         team_adjust_ops(team);
 581
 582         return 0;
 583 }
 584
 585 static int team_change_mode(struct team *team, const char *kind)
 586 {
 587         const struct team_mode *new_mode;
 588         struct net_device *dev = team->dev;
 589         int err;
 590
 591         if (!list_empty(&team->port_list)) {
 592                 netdev_err(dev, "No ports can be present during mode change\n");
 593                 return -EBUSY;
 594         }
 595
 596         if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
 597                 netdev_err(dev, "Unable to change to the same mode the team is in\n");
 598                 return -EINVAL;
 599         }
 600
 601         new_mode = team_mode_get(kind);
 602         if (!new_mode) {
 603                 netdev_err(dev, "Mode \"%s\" not found\n", kind);
 604                 return -EINVAL;
 605         }
 606
 607         err = __team_change_mode(team, new_mode);
 608         if (err) {
 609                 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
 610                 team_mode_put(new_mode);
 611                 return err;
 612         }
 613
 614         netdev_info(dev, "Mode changed to \"%s\"\n", kind);
 615         return 0;
 616 }
 617
 618
 619 /*********************
 620  * Peers notification
 621  *********************/
 622
 623 static void team_notify_peers_work(struct work_struct *work)
 624 {
 625         struct team *team;
 626         int val;
 627
 628         team = container_of(work, struct team, notify_peers.dw.work);
 629
 630         if (!rtnl_trylock()) {
 631                 schedule_delayed_work(&team->notify_peers.dw, 0);
 632                 return;
 633         }
 634         val = atomic_dec_if_positive(&team->notify_peers.count_pending);
 635         if (val < 0) {
 636                 rtnl_unlock();
 637                 return;
 638         }
 639         call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
 640         rtnl_unlock();
 641         if (val)
 642                 schedule_delayed_work(&team->notify_peers.dw,
 643                                       msecs_to_jiffies(team->notify_peers.interval));
 644 }
 645
 646 static void team_notify_peers(struct team *team)
 647 {
 648         if (!team->notify_peers.count || !netif_running(team->dev))
 649                 return;
 650         atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
 651         schedule_delayed_work(&team->notify_peers.dw, 0);
 652 }
 653
 654 static void team_notify_peers_init(struct team *team)
 655 {
 656         INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
 657 }
 658
 659 static void team_notify_peers_fini(struct team *team)
 660 {
 661         cancel_delayed_work_sync(&team->notify_peers.dw);
 662 }
 663
 664
 665 /*******************************
 666  * Send multicast group rejoins
 667  *******************************/
 668
 669 static void team_mcast_rejoin_work(struct work_struct *work)
 670 {
 671         struct team *team;
 672         int val;
 673
 674         team = container_of(work, struct team, mcast_rejoin.dw.work);
 675
 676         if (!rtnl_trylock()) {
 677                 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 678                 return;
 679         }
 680         val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending);
 681         if (val < 0) {
 682                 rtnl_unlock();
 683                 return;
 684         }
 685         call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
 686         rtnl_unlock();
 687         if (val)
 688                 schedule_delayed_work(&team->mcast_rejoin.dw,
 689                                       msecs_to_jiffies(team->mcast_rejoin.interval));
 690 }
 691
 692 static void team_mcast_rejoin(struct team *team)
 693 {
 694         if (!team->mcast_rejoin.count || !netif_running(team->dev))
 695                 return;
 696         atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
 697         schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 698 }
 699
 700 static void team_mcast_rejoin_init(struct team *team)
 701 {
 702         INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
 703 }
 704
 705 static void team_mcast_rejoin_fini(struct team *team)
 706 {
 707         cancel_delayed_work_sync(&team->mcast_rejoin.dw);
 708 }
 709
 710
 711 /************************
 712  * Rx path frame handler
 713  ************************/
 714
 715 /* note: already called with rcu_read_lock */
 716 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
 717 {
 718         struct sk_buff *skb = *pskb;
 719         struct team_port *port;
 720         struct team *team;
 721         rx_handler_result_t res;
 722
 723         skb = skb_share_check(skb, GFP_ATOMIC);
 724         if (!skb)
 725                 return RX_HANDLER_CONSUMED;
 726
 727         *pskb = skb;
 728
 729         port = team_port_get_rcu(skb->dev);
 730         team = port->team;
 731         if (!team_port_enabled(port)) {
 732                 /* allow exact match delivery for disabled ports */
 733                 res = RX_HANDLER_EXACT;
 734         } else {
 735                 res = team->ops.receive(team, port, skb);
 736         }
 737         if (res == RX_HANDLER_ANOTHER) {
 738                 struct team_pcpu_stats *pcpu_stats;
 739
 740                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
 741                 u64_stats_update_begin(&pcpu_stats->syncp);
 742                 pcpu_stats->rx_packets++;
 743                 pcpu_stats->rx_bytes += skb->len;
 744                 if (skb->pkt_type == PACKET_MULTICAST)
 745                         pcpu_stats->rx_multicast++;
 746                 u64_stats_update_end(&pcpu_stats->syncp);
 747
 748                 skb->dev = team->dev;
 749         } else {
 750                 this_cpu_inc(team->pcpu_stats->rx_dropped);
 751         }
 752
 753         return res;
 754 }
 755
 756
 757 /*************************************
 758  * Multiqueue Tx port select override
 759  *************************************/
 760
 761 static int team_queue_override_init(struct team *team)
 762 {
 763         struct list_head *listarr;
 764         unsigned int queue_cnt = team->dev->num_tx_queues - 1;
 765         unsigned int i;
 766
 767         if (!queue_cnt)
 768                 return 0;
 769         listarr = kmalloc(sizeof(struct list_head) * queue_cnt, GFP_KERNEL);
 770         if (!listarr)
 771                 return -ENOMEM;
 772         team->qom_lists = listarr;
 773         for (i = 0; i < queue_cnt; i++)
 774                 INIT_LIST_HEAD(listarr++);
 775         return 0;
 776 }
 777
 778 static void team_queue_override_fini(struct team *team)
 779 {
 780         kfree(team->qom_lists);
 781 }
 782
 783 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
 784 {
 785         return &team->qom_lists[queue_id - 1];
 786 }
 787
 788 /*
 789  * note: already called with rcu_read_lock
 790  */
 791 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
 792 {
 793         struct list_head *qom_list;
 794         struct team_port *port;
 795
 796         if (!team->queue_override_enabled || !skb->queue_mapping)
 797                 return false;
 798         qom_list = __team_get_qom_list(team, skb->queue_mapping);
 799         list_for_each_entry_rcu(port, qom_list, qom_list) {
 800                 if (!team_dev_queue_xmit(team, port, skb))
 801                         return true;
 802         }
 803         return false;
 804 }
 805
 806 static void __team_queue_override_port_del(struct team *team,
 807                                            struct team_port *port)
 808 {
 809         if (!port->queue_id)
 810                 return;
 811         list_del_rcu(&port->qom_list);
 812 }
 813
 814 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
 815                                                       struct team_port *cur)
 816 {
 817         if (port->priority < cur->priority)
 818                 return true;
 819         if (port->priority > cur->priority)
 820                 return false;
 821         if (port->index < cur->index)
 822                 return true;
 823         return false;
 824 }
 825
 826 static void __team_queue_override_port_add(struct team *team,
 827                                            struct team_port *port)
 828 {
 829         struct team_port *cur;
 830         struct list_head *qom_list;
 831         struct list_head *node;
 832
 833         if (!port->queue_id)
 834                 return;
 835         qom_list = __team_get_qom_list(team, port->queue_id);
 836         node = qom_list;
 837         list_for_each_entry(cur, qom_list, qom_list) {
 838                 if (team_queue_override_port_has_gt_prio_than(port, cur))
 839                         break;
 840                 node = &cur->qom_list;
 841         }
 842         list_add_tail_rcu(&port->qom_list, node);
 843 }
 844
 845 static void __team_queue_override_enabled_check(struct team *team)
 846 {
 847         struct team_port *port;
 848         bool enabled = false;
 849
 850         list_for_each_entry(port, &team->port_list, list) {
 851                 if (port->queue_id) {
 852                         enabled = true;
 853                         break;
 854                 }
 855         }
 856         if (enabled == team->queue_override_enabled)
 857                 return;
 858         netdev_dbg(team->dev, "%s queue override\n",
 859                    enabled ? "Enabling" : "Disabling");
 860         team->queue_override_enabled = enabled;
 861 }
 862
 863 static void team_queue_override_port_prio_changed(struct team *team,
 864                                                   struct team_port *port)
 865 {
 866         if (!port->queue_id || team_port_enabled(port))
 867                 return;
 868         __team_queue_override_port_del(team, port);
 869         __team_queue_override_port_add(team, port);
 870         __team_queue_override_enabled_check(team);
 871 }
 872
 873 static void team_queue_override_port_change_queue_id(struct team *team,
 874                                                      struct team_port *port,
 875                                                      u16 new_queue_id)
 876 {
 877         if (team_port_enabled(port)) {
 878                 __team_queue_override_port_del(team, port);
 879                 port->queue_id = new_queue_id;
 880                 __team_queue_override_port_add(team, port);
 881                 __team_queue_override_enabled_check(team);
 882         } else {
 883                 port->queue_id = new_queue_id;
 884         }
 885 }
 886
 887 static void team_queue_override_port_add(struct team *team,
 888                                          struct team_port *port)
 889 {
 890         __team_queue_override_port_add(team, port);
 891         __team_queue_override_enabled_check(team);
 892 }
 893
 894 static void team_queue_override_port_del(struct team *team,
 895                                          struct team_port *port)
 896 {
 897         __team_queue_override_port_del(team, port);
 898         __team_queue_override_enabled_check(team);
 899 }
 900
 901
 902 /****************
 903  * Port handling
 904  ****************/
 905
 906 static bool team_port_find(const struct team *team,
 907                            const struct team_port *port)
 908 {
 909         struct team_port *cur;
 910
 911         list_for_each_entry(cur, &team->port_list, list)
 912                 if (cur == port)
 913                         return true;
 914         return false;
 915 }
 916
 917 /*
 918  * Enable/disable port by adding to enabled port hashlist and setting
 919  * port->index (Might be racy so reader could see incorrect ifindex when
 920  * processing a flying packet, but that is not a problem). Write guarded
 921  * by team->lock.
 922  */
 923 static void team_port_enable(struct team *team,
 924                              struct team_port *port)
 925 {
 926         if (team_port_enabled(port))
 927                 return;
 928         port->index = team->en_port_count++;
 929         hlist_add_head_rcu(&port->hlist,
 930                            team_port_index_hash(team, port->index));
 931         team_adjust_ops(team);
 932         team_queue_override_port_add(team, port);
 933         if (team->ops.port_enabled)
 934                 team->ops.port_enabled(team, port);
 935         team_notify_peers(team);
 936         team_mcast_rejoin(team);
 937 }
 938
 939 static void __reconstruct_port_hlist(struct team *team, int rm_index)
 940 {
 941         int i;
 942         struct team_port *port;
 943
 944         for (i = rm_index + 1; i < team->en_port_count; i++) {
 945                 port = team_get_port_by_index(team, i);
 946                 hlist_del_rcu(&port->hlist);
 947                 port->index--;
 948                 hlist_add_head_rcu(&port->hlist,
 949                                    team_port_index_hash(team, port->index));
 950         }
 951 }
 952
 953 static void team_port_disable(struct team *team,
 954                               struct team_port *port)
 955 {
 956         if (!team_port_enabled(port))
 957                 return;
 958         if (team->ops.port_disabled)
 959                 team->ops.port_disabled(team, port);
 960         hlist_del_rcu(&port->hlist);
 961         __reconstruct_port_hlist(team, port->index);
 962         port->index = -1;
 963         team->en_port_count--;
 964         team_queue_override_port_del(team, port);
 965         team_adjust_ops(team);
 966         team_notify_peers(team);
 967         team_mcast_rejoin(team);
 968 }
 969
 970 #define TEAM_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
 971                             NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
 972                             NETIF_F_HIGHDMA | NETIF_F_LRO)
 973
 974 static void __team_compute_features(struct team *team)
 975 {
 976         struct team_port *port;
 977         u32 vlan_features = TEAM_VLAN_FEATURES & NETIF_F_ALL_FOR_ALL;
 978         unsigned short max_hard_header_len = ETH_HLEN;
 979         unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
 980                                         IFF_XMIT_DST_RELEASE_PERM;
 981
 982         list_for_each_entry(port, &team->port_list, list) {
 983                 vlan_features = netdev_increment_features(vlan_features,
 984                                         port->dev->vlan_features,
 985                                         TEAM_VLAN_FEATURES);
 986
 987                 dst_release_flag &= port->dev->priv_flags;
 988                 if (port->dev->hard_header_len > max_hard_header_len)
 989                         max_hard_header_len = port->dev->hard_header_len;
 990         }
 991
 992         team->dev->vlan_features = vlan_features;
 993         team->dev->hard_header_len = max_hard_header_len;
 994
 995         team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
 996         if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
 997                 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
 998
 999         netdev_change_features(team->dev);
1000 }
1001
1002 static void team_compute_features(struct team *team)
1003 {
1004         mutex_lock(&team->lock);
1005         __team_compute_features(team);
1006         mutex_unlock(&team->lock);
1007 }
1008
1009 static int team_port_enter(struct team *team, struct team_port *port)
1010 {
1011         int err = 0;
1012
1013         dev_hold(team->dev);
1014         if (team->ops.port_enter) {
1015                 err = team->ops.port_enter(team, port);
1016                 if (err) {
1017                         netdev_err(team->dev, "Device %s failed to enter team mode\n",
1018                                    port->dev->name);
1019                         goto err_port_enter;
1020                 }
1021         }
1022
1023         return 0;
1024
1025 err_port_enter:
1026         dev_put(team->dev);
1027
1028         return err;
1029 }
1030
1031 static void team_port_leave(struct team *team, struct team_port *port)
1032 {
1033         if (team->ops.port_leave)
1034                 team->ops.port_leave(team, port);
1035         dev_put(team->dev);
1036 }
1037
1038 #ifdef CONFIG_NET_POLL_CONTROLLER
1039 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1040 {
1041         struct netpoll *np;
1042         int err;
1043
1044         if (!team->dev->npinfo)
1045                 return 0;
1046
1047         np = kzalloc(sizeof(*np), GFP_KERNEL);
1048         if (!np)
1049                 return -ENOMEM;
1050
1051         err = __netpoll_setup(np, port->dev);
1052         if (err) {
1053                 kfree(np);
1054                 return err;
1055         }
1056         port->np = np;
1057         return err;
1058 }
1059
1060 static void team_port_disable_netpoll(struct team_port *port)
1061 {
1062         struct netpoll *np = port->np;
1063
1064         if (!np)
1065                 return;
1066         port->np = NULL;
1067
1068         /* Wait for transmitting packets to finish before freeing. */
1069         synchronize_rcu_bh();
1070         __netpoll_cleanup(np);
1071         kfree(np);
1072 }
1073 #else
1074 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1075 {
1076         return 0;
1077 }
1078 static void team_port_disable_netpoll(struct team_port *port)
1079 {
1080 }
1081 #endif
1082
1083 static int team_upper_dev_link(struct net_device *dev,
1084                                struct net_device *port_dev)
1085 {
1086         int err;
1087
1088         err = netdev_master_upper_dev_link(port_dev, dev);
1089         if (err)
1090                 return err;
1091         port_dev->priv_flags |= IFF_TEAM_PORT;
1092         return 0;
1093 }
1094
1095 static void team_upper_dev_unlink(struct net_device *dev,
1096                                   struct net_device *port_dev)
1097 {
1098         netdev_upper_dev_unlink(port_dev, dev);
1099         port_dev->priv_flags &= ~IFF_TEAM_PORT;
1100 }
1101
1102 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1103 static int team_dev_type_check_change(struct net_device *dev,
1104                                       struct net_device *port_dev);
1105
1106 static int team_port_add(struct team *team, struct net_device *port_dev)
1107 {
1108         struct net_device *dev = team->dev;
1109         struct team_port *port;
1110         char *portname = port_dev->name;
1111         int err;
1112
1113         if (port_dev->flags & IFF_LOOPBACK) {
1114                 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1115                            portname);
1116                 return -EINVAL;
1117         }
1118
1119         if (team_port_exists(port_dev)) {
1120                 netdev_err(dev, "Device %s is already a port "
1121                                 "of a team device\n", portname);
1122                 return -EBUSY;
1123         }
1124
1125         if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1126             vlan_uses_dev(dev)) {
1127                 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1128                            portname);
1129                 return -EPERM;
1130         }
1131
1132         err = team_dev_type_check_change(dev, port_dev);
1133         if (err)
1134                 return err;
1135
1136         if (port_dev->flags & IFF_UP) {
1137                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1138                            portname);
1139                 return -EBUSY;
1140         }
1141
1142         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1143                        GFP_KERNEL);
1144         if (!port)
1145                 return -ENOMEM;
1146
1147         port->dev = port_dev;
1148         port->team = team;
1149         INIT_LIST_HEAD(&port->qom_list);
1150
1151         port->orig.mtu = port_dev->mtu;
1152         err = dev_set_mtu(port_dev, dev->mtu);
1153         if (err) {
1154                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1155                 goto err_set_mtu;
1156         }
1157
1158         memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1159
1160         err = team_port_enter(team, port);
1161         if (err) {
1162                 netdev_err(dev, "Device %s failed to enter team mode\n",
1163                            portname);
1164                 goto err_port_enter;
1165         }
1166
1167         err = dev_open(port_dev);
1168         if (err) {
1169                 netdev_dbg(dev, "Device %s opening failed\n",
1170                            portname);
1171                 goto err_dev_open;
1172         }
1173
1174         err = vlan_vids_add_by_dev(port_dev, dev);
1175         if (err) {
1176                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1177                                 portname);
1178                 goto err_vids_add;
1179         }
1180
1181         err = team_port_enable_netpoll(team, port);
1182         if (err) {
1183                 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1184                            portname);
1185                 goto err_enable_netpoll;
1186         }
1187
1188         if (!(dev->features & NETIF_F_LRO))
1189                 dev_disable_lro(port_dev);
1190
1191         err = netdev_rx_handler_register(port_dev, team_handle_frame,
1192                                          port);
1193         if (err) {
1194                 netdev_err(dev, "Device %s failed to register rx_handler\n",
1195                            portname);
1196                 goto err_handler_register;
1197         }
1198
1199         err = team_upper_dev_link(dev, port_dev);
1200         if (err) {
1201                 netdev_err(dev, "Device %s failed to set upper link\n",
1202                            portname);
1203                 goto err_set_upper_link;
1204         }
1205
1206         err = __team_option_inst_add_port(team, port);
1207         if (err) {
1208                 netdev_err(dev, "Device %s failed to add per-port options\n",
1209                            portname);
1210                 goto err_option_port_add;
1211         }
1212
1213         port->index = -1;
1214         list_add_tail_rcu(&port->list, &team->port_list);
1215         team_port_enable(team, port);
1216         __team_compute_features(team);
1217         __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1218         __team_options_change_check(team);
1219
1220         netdev_info(dev, "Port device %s added\n", portname);
1221
1222         return 0;
1223
1224 err_option_port_add:
1225         team_upper_dev_unlink(dev, port_dev);
1226
1227 err_set_upper_link:
1228         netdev_rx_handler_unregister(port_dev);
1229
1230 err_handler_register:
1231         team_port_disable_netpoll(port);
1232
1233 err_enable_netpoll:
1234         vlan_vids_del_by_dev(port_dev, dev);
1235
1236 err_vids_add:
1237         dev_close(port_dev);
1238
1239 err_dev_open:
1240         team_port_leave(team, port);
1241         team_port_set_orig_dev_addr(port);
1242
1243 err_port_enter:
1244         dev_set_mtu(port_dev, port->orig.mtu);
1245
1246 err_set_mtu:
1247         kfree(port);
1248
1249         return err;
1250 }
1251
1252 static void __team_port_change_port_removed(struct team_port *port);
1253
1254 static int team_port_del(struct team *team, struct net_device *port_dev)
1255 {
1256         struct net_device *dev = team->dev;
1257         struct team_port *port;
1258         char *portname = port_dev->name;
1259
1260         port = team_port_get_rtnl(port_dev);
1261         if (!port || !team_port_find(team, port)) {
1262                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1263                            portname);
1264                 return -ENOENT;
1265         }
1266
1267         team_port_disable(team, port);
1268         list_del_rcu(&port->list);
1269         team_upper_dev_unlink(dev, port_dev);
1270         netdev_rx_handler_unregister(port_dev);
1271         team_port_disable_netpoll(port);
1272         vlan_vids_del_by_dev(port_dev, dev);
1273         dev_uc_unsync(port_dev, dev);
1274         dev_mc_unsync(port_dev, dev);
1275         dev_close(port_dev);
1276         team_port_leave(team, port);
1277
1278         __team_option_inst_mark_removed_port(team, port);
1279         __team_options_change_check(team);
1280         __team_option_inst_del_port(team, port);
1281         __team_port_change_port_removed(port);
1282
1283         team_port_set_orig_dev_addr(port);
1284         dev_set_mtu(port_dev, port->orig.mtu);
1285         kfree_rcu(port, rcu);
1286         netdev_info(dev, "Port device %s removed\n", portname);
1287         __team_compute_features(team);
1288
1289         return 0;
1290 }
1291
1292
1293 /*****************
1294  * Net device ops
1295  *****************/
1296
1297 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1298 {
1299         ctx->data.str_val = team->mode->kind;
1300         return 0;
1301 }
1302
1303 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1304 {
1305         return team_change_mode(team, ctx->data.str_val);
1306 }
1307
1308 static int team_notify_peers_count_get(struct team *team,
1309                                        struct team_gsetter_ctx *ctx)
1310 {
1311         ctx->data.u32_val = team->notify_peers.count;
1312         return 0;
1313 }
1314
1315 static int team_notify_peers_count_set(struct team *team,
1316                                        struct team_gsetter_ctx *ctx)
1317 {
1318         team->notify_peers.count = ctx->data.u32_val;
1319         return 0;
1320 }
1321
1322 static int team_notify_peers_interval_get(struct team *team,
1323                                           struct team_gsetter_ctx *ctx)
1324 {
1325         ctx->data.u32_val = team->notify_peers.interval;
1326         return 0;
1327 }
1328
1329 static int team_notify_peers_interval_set(struct team *team,
1330                                           struct team_gsetter_ctx *ctx)
1331 {
1332         team->notify_peers.interval = ctx->data.u32_val;
1333         return 0;
1334 }
1335
1336 static int team_mcast_rejoin_count_get(struct team *team,
1337                                        struct team_gsetter_ctx *ctx)
1338 {
1339         ctx->data.u32_val = team->mcast_rejoin.count;
1340         return 0;
1341 }
1342
1343 static int team_mcast_rejoin_count_set(struct team *team,
1344                                        struct team_gsetter_ctx *ctx)
1345 {
1346         team->mcast_rejoin.count = ctx->data.u32_val;
1347         return 0;
1348 }
1349
1350 static int team_mcast_rejoin_interval_get(struct team *team,
1351                                           struct team_gsetter_ctx *ctx)
1352 {
1353         ctx->data.u32_val = team->mcast_rejoin.interval;
1354         return 0;
1355 }
1356
1357 static int team_mcast_rejoin_interval_set(struct team *team,
1358                                           struct team_gsetter_ctx *ctx)
1359 {
1360         team->mcast_rejoin.interval = ctx->data.u32_val;
1361         return 0;
1362 }
1363
1364 static int team_port_en_option_get(struct team *team,
1365                                    struct team_gsetter_ctx *ctx)
1366 {
1367         struct team_port *port = ctx->info->port;
1368
1369         ctx->data.bool_val = team_port_enabled(port);
1370         return 0;
1371 }
1372
1373 static int team_port_en_option_set(struct team *team,
1374                                    struct team_gsetter_ctx *ctx)
1375 {
1376         struct team_port *port = ctx->info->port;
1377
1378         if (ctx->data.bool_val)
1379                 team_port_enable(team, port);
1380         else
1381                 team_port_disable(team, port);
1382         return 0;
1383 }
1384
1385 static int team_user_linkup_option_get(struct team *team,
1386                                        struct team_gsetter_ctx *ctx)
1387 {
1388         struct team_port *port = ctx->info->port;
1389
1390         ctx->data.bool_val = port->user.linkup;
1391         return 0;
1392 }
1393
1394 static void __team_carrier_check(struct team *team);
1395
1396 static int team_user_linkup_option_set(struct team *team,
1397                                        struct team_gsetter_ctx *ctx)
1398 {
1399         struct team_port *port = ctx->info->port;
1400
1401         port->user.linkup = ctx->data.bool_val;
1402         team_refresh_port_linkup(port);
1403         __team_carrier_check(port->team);
1404         return 0;
1405 }
1406
1407 static int team_user_linkup_en_option_get(struct team *team,
1408                                           struct team_gsetter_ctx *ctx)
1409 {
1410         struct team_port *port = ctx->info->port;
1411
1412         ctx->data.bool_val = port->user.linkup_enabled;
1413         return 0;
1414 }
1415
1416 static int team_user_linkup_en_option_set(struct team *team,
1417                                           struct team_gsetter_ctx *ctx)
1418 {
1419         struct team_port *port = ctx->info->port;
1420
1421         port->user.linkup_enabled = ctx->data.bool_val;
1422         team_refresh_port_linkup(port);
1423         __team_carrier_check(port->team);
1424         return 0;
1425 }
1426
1427 static int team_priority_option_get(struct team *team,
1428                                     struct team_gsetter_ctx *ctx)
1429 {
1430         struct team_port *port = ctx->info->port;
1431
1432         ctx->data.s32_val = port->priority;
1433         return 0;
1434 }
1435
1436 static int team_priority_option_set(struct team *team,
1437                                     struct team_gsetter_ctx *ctx)
1438 {
1439         struct team_port *port = ctx->info->port;
1440         s32 priority = ctx->data.s32_val;
1441
1442         if (port->priority == priority)
1443                 return 0;
1444         port->priority = priority;
1445         team_queue_override_port_prio_changed(team, port);
1446         return 0;
1447 }
1448
1449 static int team_queue_id_option_get(struct team *team,
1450                                     struct team_gsetter_ctx *ctx)
1451 {
1452         struct team_port *port = ctx->info->port;
1453
1454         ctx->data.u32_val = port->queue_id;
1455         return 0;
1456 }
1457
1458 static int team_queue_id_option_set(struct team *team,
1459                                     struct team_gsetter_ctx *ctx)
1460 {
1461         struct team_port *port = ctx->info->port;
1462         u16 new_queue_id = ctx->data.u32_val;
1463
1464         if (port->queue_id == new_queue_id)
1465                 return 0;
1466         if (new_queue_id >= team->dev->real_num_tx_queues)
1467                 return -EINVAL;
1468         team_queue_override_port_change_queue_id(team, port, new_queue_id);
1469         return 0;
1470 }
1471
1472 static const struct team_option team_options[] = {
1473         {
1474                 .name = "mode",
1475                 .type = TEAM_OPTION_TYPE_STRING,
1476                 .getter = team_mode_option_get,
1477                 .setter = team_mode_option_set,
1478         },
1479         {
1480                 .name = "notify_peers_count",
1481                 .type = TEAM_OPTION_TYPE_U32,
1482                 .getter = team_notify_peers_count_get,
1483                 .setter = team_notify_peers_count_set,
1484         },
1485         {
1486                 .name = "notify_peers_interval",
1487                 .type = TEAM_OPTION_TYPE_U32,
1488                 .getter = team_notify_peers_interval_get,
1489                 .setter = team_notify_peers_interval_set,
1490         },
1491         {
1492                 .name = "mcast_rejoin_count",
1493                 .type = TEAM_OPTION_TYPE_U32,
1494                 .getter = team_mcast_rejoin_count_get,
1495                 .setter = team_mcast_rejoin_count_set,
1496         },
1497         {
1498                 .name = "mcast_rejoin_interval",
1499                 .type = TEAM_OPTION_TYPE_U32,
1500                 .getter = team_mcast_rejoin_interval_get,
1501                 .setter = team_mcast_rejoin_interval_set,
1502         },
1503         {
1504                 .name = "enabled",
1505                 .type = TEAM_OPTION_TYPE_BOOL,
1506                 .per_port = true,
1507                 .getter = team_port_en_option_get,
1508                 .setter = team_port_en_option_set,
1509         },
1510         {
1511                 .name = "user_linkup",
1512                 .type = TEAM_OPTION_TYPE_BOOL,
1513                 .per_port = true,
1514                 .getter = team_user_linkup_option_get,
1515                 .setter = team_user_linkup_option_set,
1516         },
1517         {
1518                 .name = "user_linkup_enabled",
1519                 .type = TEAM_OPTION_TYPE_BOOL,
1520                 .per_port = true,
1521                 .getter = team_user_linkup_en_option_get,
1522                 .setter = team_user_linkup_en_option_set,
1523         },
1524         {
1525                 .name = "priority",
1526                 .type = TEAM_OPTION_TYPE_S32,
1527                 .per_port = true,
1528                 .getter = team_priority_option_get,
1529                 .setter = team_priority_option_set,
1530         },
1531         {
1532                 .name = "queue_id",
1533                 .type = TEAM_OPTION_TYPE_U32,
1534                 .per_port = true,
1535                 .getter = team_queue_id_option_get,
1536                 .setter = team_queue_id_option_set,
1537         },
1538 };
1539
1540 static struct lock_class_key team_netdev_xmit_lock_key;
1541 static struct lock_class_key team_netdev_addr_lock_key;
1542 static struct lock_class_key team_tx_busylock_key;
1543
1544 static void team_set_lockdep_class_one(struct net_device *dev,
1545                                        struct netdev_queue *txq,
1546                                        void *unused)
1547 {
1548         lockdep_set_class(&txq->_xmit_lock, &team_netdev_xmit_lock_key);
1549 }
1550
1551 static void team_set_lockdep_class(struct net_device *dev)
1552 {
1553         lockdep_set_class(&dev->addr_list_lock, &team_netdev_addr_lock_key);
1554         netdev_for_each_tx_queue(dev, team_set_lockdep_class_one, NULL);
1555         dev->qdisc_tx_busylock = &team_tx_busylock_key;
1556 }
1557
1558 static int team_init(struct net_device *dev)
1559 {
1560         struct team *team = netdev_priv(dev);
1561         int i;
1562         int err;
1563
1564         team->dev = dev;
1565         mutex_init(&team->lock);
1566         team_set_no_mode(team);
1567
1568         team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1569         if (!team->pcpu_stats)
1570                 return -ENOMEM;
1571
1572         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1573                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1574         INIT_LIST_HEAD(&team->port_list);
1575         err = team_queue_override_init(team);
1576         if (err)
1577                 goto err_team_queue_override_init;
1578
1579         team_adjust_ops(team);
1580
1581         INIT_LIST_HEAD(&team->option_list);
1582         INIT_LIST_HEAD(&team->option_inst_list);
1583
1584         team_notify_peers_init(team);
1585         team_mcast_rejoin_init(team);
1586
1587         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1588         if (err)
1589                 goto err_options_register;
1590         netif_carrier_off(dev);
1591
1592         team_set_lockdep_class(dev);
1593
1594         return 0;
1595
1596 err_options_register:
1597         team_mcast_rejoin_fini(team);
1598         team_notify_peers_fini(team);
1599         team_queue_override_fini(team);
1600 err_team_queue_override_init:
1601         free_percpu(team->pcpu_stats);
1602
1603         return err;
1604 }
1605
1606 static void team_uninit(struct net_device *dev)
1607 {
1608         struct team *team = netdev_priv(dev);
1609         struct team_port *port;
1610         struct team_port *tmp;
1611
1612         mutex_lock(&team->lock);
1613         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1614                 team_port_del(team, port->dev);
1615
1616         __team_change_mode(team, NULL); /* cleanup */
1617         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1618         team_mcast_rejoin_fini(team);
1619         team_notify_peers_fini(team);
1620         team_queue_override_fini(team);
1621         mutex_unlock(&team->lock);
1622 }
1623
1624 static void team_destructor(struct net_device *dev)
1625 {
1626         struct team *team = netdev_priv(dev);
1627
1628         free_percpu(team->pcpu_stats);
1629         free_netdev(dev);
1630 }
1631
1632 static int team_open(struct net_device *dev)
1633 {
1634         return 0;
1635 }
1636
1637 static int team_close(struct net_device *dev)
1638 {
1639         return 0;
1640 }
1641
1642 /*
1643  * note: already called with rcu_read_lock
1644  */
1645 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1646 {
1647         struct team *team = netdev_priv(dev);
1648         bool tx_success;
1649         unsigned int len = skb->len;
1650
1651         tx_success = team_queue_override_transmit(team, skb);
1652         if (!tx_success)
1653                 tx_success = team->ops.transmit(team, skb);
1654         if (tx_success) {
1655                 struct team_pcpu_stats *pcpu_stats;
1656
1657                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1658                 u64_stats_update_begin(&pcpu_stats->syncp);
1659                 pcpu_stats->tx_packets++;
1660                 pcpu_stats->tx_bytes += len;
1661                 u64_stats_update_end(&pcpu_stats->syncp);
1662         } else {
1663                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1664         }
1665
1666         return NETDEV_TX_OK;
1667 }
1668
1669 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1670                              void *accel_priv, select_queue_fallback_t fallback)
1671 {
1672         /*
1673          * This helper function exists to help dev_pick_tx get the correct
1674          * destination queue.  Using a helper function skips a call to
1675          * skb_tx_hash and will put the skbs in the queue we expect on their
1676          * way down to the team driver.
1677          */
1678         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1679
1680         /*
1681          * Save the original txq to restore before passing to the driver
1682          */
1683         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1684
1685         if (unlikely(txq >= dev->real_num_tx_queues)) {
1686                 do {
1687                         txq -= dev->real_num_tx_queues;
1688                 } while (txq >= dev->real_num_tx_queues);
1689         }
1690         return txq;
1691 }
1692
1693 static void team_change_rx_flags(struct net_device *dev, int change)
1694 {
1695         struct team *team = netdev_priv(dev);
1696         struct team_port *port;
1697         int inc;
1698
1699         rcu_read_lock();
1700         list_for_each_entry_rcu(port, &team->port_list, list) {
1701                 if (change & IFF_PROMISC) {
1702                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1703                         dev_set_promiscuity(port->dev, inc);
1704                 }
1705                 if (change & IFF_ALLMULTI) {
1706                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1707                         dev_set_allmulti(port->dev, inc);
1708                 }
1709         }
1710         rcu_read_unlock();
1711 }
1712
1713 static void team_set_rx_mode(struct net_device *dev)
1714 {
1715         struct team *team = netdev_priv(dev);
1716         struct team_port *port;
1717
1718         rcu_read_lock();
1719         list_for_each_entry_rcu(port, &team->port_list, list) {
1720                 dev_uc_sync_multiple(port->dev, dev);
1721                 dev_mc_sync_multiple(port->dev, dev);
1722         }
1723         rcu_read_unlock();
1724 }
1725
1726 static int team_set_mac_address(struct net_device *dev, void *p)
1727 {
1728         struct sockaddr *addr = p;
1729         struct team *team = netdev_priv(dev);
1730         struct team_port *port;
1731
1732         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1733                 return -EADDRNOTAVAIL;
1734         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1735         rcu_read_lock();
1736         list_for_each_entry_rcu(port, &team->port_list, list)
1737                 if (team->ops.port_change_dev_addr)
1738                         team->ops.port_change_dev_addr(team, port);
1739         rcu_read_unlock();
1740         return 0;
1741 }
1742
1743 static int team_change_mtu(struct net_device *dev, int new_mtu)
1744 {
1745         struct team *team = netdev_priv(dev);
1746         struct team_port *port;
1747         int err;
1748
1749         /*
1750          * Alhough this is reader, it's guarded by team lock. It's not possible
1751          * to traverse list in reverse under rcu_read_lock
1752          */
1753         mutex_lock(&team->lock);
1754         team->port_mtu_change_allowed = true;
1755         list_for_each_entry(port, &team->port_list, list) {
1756                 err = dev_set_mtu(port->dev, new_mtu);
1757                 if (err) {
1758                         netdev_err(dev, "Device %s failed to change mtu",
1759                                    port->dev->name);
1760                         goto unwind;
1761                 }
1762         }
1763         team->port_mtu_change_allowed = false;
1764         mutex_unlock(&team->lock);
1765
1766         dev->mtu = new_mtu;
1767
1768         return 0;
1769
1770 unwind:
1771         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1772                 dev_set_mtu(port->dev, dev->mtu);
1773         team->port_mtu_change_allowed = false;
1774         mutex_unlock(&team->lock);
1775
1776         return err;
1777 }
1778
1779 static struct rtnl_link_stats64 *
1780 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1781 {
1782         struct team *team = netdev_priv(dev);
1783         struct team_pcpu_stats *p;
1784         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1785         u32 rx_dropped = 0, tx_dropped = 0;
1786         unsigned int start;
1787         int i;
1788
1789         for_each_possible_cpu(i) {
1790                 p = per_cpu_ptr(team->pcpu_stats, i);
1791                 do {
1792                         start = u64_stats_fetch_begin_irq(&p->syncp);
1793                         rx_packets      = p->rx_packets;
1794                         rx_bytes        = p->rx_bytes;
1795                         rx_multicast    = p->rx_multicast;
1796                         tx_packets      = p->tx_packets;
1797                         tx_bytes        = p->tx_bytes;
1798                 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1799
1800                 stats->rx_packets       += rx_packets;
1801                 stats->rx_bytes         += rx_bytes;
1802                 stats->multicast        += rx_multicast;
1803                 stats->tx_packets       += tx_packets;
1804                 stats->tx_bytes         += tx_bytes;
1805                 /*
1806                  * rx_dropped & tx_dropped are u32, updated
1807                  * without syncp protection.
1808                  */
1809                 rx_dropped      += p->rx_dropped;
1810                 tx_dropped      += p->tx_dropped;
1811         }
1812         stats->rx_dropped       = rx_dropped;
1813         stats->tx_dropped       = tx_dropped;
1814         return stats;
1815 }
1816
1817 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1818 {
1819         struct team *team = netdev_priv(dev);
1820         struct team_port *port;
1821         int err;
1822
1823         /*
1824          * Alhough this is reader, it's guarded by team lock. It's not possible
1825          * to traverse list in reverse under rcu_read_lock
1826          */
1827         mutex_lock(&team->lock);
1828         list_for_each_entry(port, &team->port_list, list) {
1829                 err = vlan_vid_add(port->dev, proto, vid);
1830                 if (err)
1831                         goto unwind;
1832         }
1833         mutex_unlock(&team->lock);
1834
1835         return 0;
1836
1837 unwind:
1838         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1839                 vlan_vid_del(port->dev, proto, vid);
1840         mutex_unlock(&team->lock);
1841
1842         return err;
1843 }
1844
1845 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1846 {
1847         struct team *team = netdev_priv(dev);
1848         struct team_port *port;
1849
1850         rcu_read_lock();
1851         list_for_each_entry_rcu(port, &team->port_list, list)
1852                 vlan_vid_del(port->dev, proto, vid);
1853         rcu_read_unlock();
1854
1855         return 0;
1856 }
1857
1858 #ifdef CONFIG_NET_POLL_CONTROLLER
1859 static void team_poll_controller(struct net_device *dev)
1860 {
1861 }
1862
1863 static void __team_netpoll_cleanup(struct team *team)
1864 {
1865         struct team_port *port;
1866
1867         list_for_each_entry(port, &team->port_list, list)
1868                 team_port_disable_netpoll(port);
1869 }
1870
1871 static void team_netpoll_cleanup(struct net_device *dev)
1872 {
1873         struct team *team = netdev_priv(dev);
1874
1875         mutex_lock(&team->lock);
1876         __team_netpoll_cleanup(team);
1877         mutex_unlock(&team->lock);
1878 }
1879
1880 static int team_netpoll_setup(struct net_device *dev,
1881                               struct netpoll_info *npifo)
1882 {
1883         struct team *team = netdev_priv(dev);
1884         struct team_port *port;
1885         int err = 0;
1886
1887         mutex_lock(&team->lock);
1888         list_for_each_entry(port, &team->port_list, list) {
1889                 err = team_port_enable_netpoll(team, port);
1890                 if (err) {
1891                         __team_netpoll_cleanup(team);
1892                         break;
1893                 }
1894         }
1895         mutex_unlock(&team->lock);
1896         return err;
1897 }
1898 #endif
1899
1900 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1901 {
1902         struct team *team = netdev_priv(dev);
1903         int err;
1904
1905         mutex_lock(&team->lock);
1906         err = team_port_add(team, port_dev);
1907         mutex_unlock(&team->lock);
1908         return err;
1909 }
1910
1911 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1912 {
1913         struct team *team = netdev_priv(dev);
1914         int err;
1915
1916         mutex_lock(&team->lock);
1917         err = team_port_del(team, port_dev);
1918         mutex_unlock(&team->lock);
1919         return err;
1920 }
1921
1922 static netdev_features_t team_fix_features(struct net_device *dev,
1923                                            netdev_features_t features)
1924 {
1925         struct team_port *port;
1926         struct team *team = netdev_priv(dev);
1927         netdev_features_t mask;
1928
1929         mask = features | NETIF_F_HW_SWITCH_OFFLOAD;
1930         features &= ~NETIF_F_ONE_FOR_ALL;
1931         features |= NETIF_F_ALL_FOR_ALL;
1932
1933         rcu_read_lock();
1934         list_for_each_entry_rcu(port, &team->port_list, list) {
1935                 features = netdev_increment_features(features,
1936                                                      port->dev->features,
1937                                                      mask);
1938         }
1939         rcu_read_unlock();
1940         return features;
1941 }
1942
1943 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1944 {
1945         struct team *team = netdev_priv(dev);
1946
1947         team->user_carrier_enabled = true;
1948
1949         if (new_carrier)
1950                 netif_carrier_on(dev);
1951         else
1952                 netif_carrier_off(dev);
1953         return 0;
1954 }
1955
1956 static const struct net_device_ops team_netdev_ops = {
1957         .ndo_init               = team_init,
1958         .ndo_uninit             = team_uninit,
1959         .ndo_open               = team_open,
1960         .ndo_stop               = team_close,
1961         .ndo_start_xmit         = team_xmit,
1962         .ndo_select_queue       = team_select_queue,
1963         .ndo_change_rx_flags    = team_change_rx_flags,
1964         .ndo_set_rx_mode        = team_set_rx_mode,
1965         .ndo_set_mac_address    = team_set_mac_address,
1966         .ndo_change_mtu         = team_change_mtu,
1967         .ndo_get_stats64        = team_get_stats64,
1968         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
1969         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
1970 #ifdef CONFIG_NET_POLL_CONTROLLER
1971         .ndo_poll_controller    = team_poll_controller,
1972         .ndo_netpoll_setup      = team_netpoll_setup,
1973         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
1974 #endif
1975         .ndo_add_slave          = team_add_slave,
1976         .ndo_del_slave          = team_del_slave,
1977         .ndo_fix_features       = team_fix_features,
1978         .ndo_change_carrier     = team_change_carrier,
1979         .ndo_bridge_setlink     = ndo_dflt_netdev_switch_port_bridge_setlink,
1980         .ndo_bridge_dellink     = ndo_dflt_netdev_switch_port_bridge_dellink,
1981 };
1982
1983 /***********************
1984  * ethtool interface
1985  ***********************/
1986
1987 static void team_ethtool_get_drvinfo(struct net_device *dev,
1988                                      struct ethtool_drvinfo *drvinfo)
1989 {
1990         strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
1991         strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
1992 }
1993
1994 static const struct ethtool_ops team_ethtool_ops = {
1995         .get_drvinfo            = team_ethtool_get_drvinfo,
1996         .get_link               = ethtool_op_get_link,
1997 };
1998
1999 /***********************
2000  * rt netlink interface
2001  ***********************/
2002
2003 static void team_setup_by_port(struct net_device *dev,
2004                                struct net_device *port_dev)
2005 {
2006         dev->header_ops = port_dev->header_ops;
2007         dev->type = port_dev->type;
2008         dev->hard_header_len = port_dev->hard_header_len;
2009         dev->addr_len = port_dev->addr_len;
2010         dev->mtu = port_dev->mtu;
2011         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2012         eth_hw_addr_inherit(dev, port_dev);
2013 }
2014
2015 static int team_dev_type_check_change(struct net_device *dev,
2016                                       struct net_device *port_dev)
2017 {
2018         struct team *team = netdev_priv(dev);
2019         char *portname = port_dev->name;
2020         int err;
2021
2022         if (dev->type == port_dev->type)
2023                 return 0;
2024         if (!list_empty(&team->port_list)) {
2025                 netdev_err(dev, "Device %s is of different type\n", portname);
2026                 return -EBUSY;
2027         }
2028         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2029         err = notifier_to_errno(err);
2030         if (err) {
2031                 netdev_err(dev, "Refused to change device type\n");
2032                 return err;
2033         }
2034         dev_uc_flush(dev);
2035         dev_mc_flush(dev);
2036         team_setup_by_port(dev, port_dev);
2037         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2038         return 0;
2039 }
2040
2041 static void team_setup(struct net_device *dev)
2042 {
2043         ether_setup(dev);
2044
2045         dev->netdev_ops = &team_netdev_ops;
2046         dev->ethtool_ops = &team_ethtool_ops;
2047         dev->destructor = team_destructor;
2048         dev->tx_queue_len = 0;
2049         dev->flags |= IFF_MULTICAST;
2050         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2051
2052         /*
2053          * Indicate we support unicast address filtering. That way core won't
2054          * bring us to promisc mode in case a unicast addr is added.
2055          * Let this up to underlay drivers.
2056          */
2057         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2058
2059         dev->features |= NETIF_F_LLTX;
2060         dev->features |= NETIF_F_GRO;
2061
2062         /* Don't allow team devices to change network namespaces. */
2063         dev->features |= NETIF_F_NETNS_LOCAL;
2064
2065         dev->hw_features = TEAM_VLAN_FEATURES |
2066                            NETIF_F_HW_VLAN_CTAG_TX |
2067                            NETIF_F_HW_VLAN_CTAG_RX |
2068                            NETIF_F_HW_VLAN_CTAG_FILTER;
2069
2070         dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_HW_CSUM);
2071         dev->features |= dev->hw_features;
2072 }
2073
2074 static int team_newlink(struct net *src_net, struct net_device *dev,
2075                         struct nlattr *tb[], struct nlattr *data[])
2076 {
2077         if (tb[IFLA_ADDRESS] == NULL)
2078                 eth_hw_addr_random(dev);
2079
2080         return register_netdevice(dev);
2081 }
2082
2083 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
2084 {
2085         if (tb[IFLA_ADDRESS]) {
2086                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2087                         return -EINVAL;
2088                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2089                         return -EADDRNOTAVAIL;
2090         }
2091         return 0;
2092 }
2093
2094 static unsigned int team_get_num_tx_queues(void)
2095 {
2096         return TEAM_DEFAULT_NUM_TX_QUEUES;
2097 }
2098
2099 static unsigned int team_get_num_rx_queues(void)
2100 {
2101         return TEAM_DEFAULT_NUM_RX_QUEUES;
2102 }
2103
2104 static struct rtnl_link_ops team_link_ops __read_mostly = {
2105         .kind                   = DRV_NAME,
2106         .priv_size              = sizeof(struct team),
2107         .setup                  = team_setup,
2108         .newlink                = team_newlink,
2109         .validate               = team_validate,
2110         .get_num_tx_queues      = team_get_num_tx_queues,
2111         .get_num_rx_queues      = team_get_num_rx_queues,
2112 };
2113
2114
2115 /***********************************
2116  * Generic netlink custom interface
2117  ***********************************/
2118
2119 static struct genl_family team_nl_family = {
2120         .id             = GENL_ID_GENERATE,
2121         .name           = TEAM_GENL_NAME,
2122         .version        = TEAM_GENL_VERSION,
2123         .maxattr        = TEAM_ATTR_MAX,
2124         .netnsok        = true,
2125 };
2126
2127 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2128         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
2129         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
2130         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
2131         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
2132 };
2133
2134 static const struct nla_policy
2135 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2136         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
2137         [TEAM_ATTR_OPTION_NAME] = {
2138                 .type = NLA_STRING,
2139                 .len = TEAM_STRING_MAX_LEN,
2140         },
2141         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
2142         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
2143         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
2144 };
2145
2146 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2147 {
2148         struct sk_buff *msg;
2149         void *hdr;
2150         int err;
2151
2152         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2153         if (!msg)
2154                 return -ENOMEM;
2155
2156         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2157                           &team_nl_family, 0, TEAM_CMD_NOOP);
2158         if (!hdr) {
2159                 err = -EMSGSIZE;
2160                 goto err_msg_put;
2161         }
2162
2163         genlmsg_end(msg, hdr);
2164
2165         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2166
2167 err_msg_put:
2168         nlmsg_free(msg);
2169
2170         return err;
2171 }
2172
2173 /*
2174  * Netlink cmd functions should be locked by following two functions.
2175  * Since dev gets held here, that ensures dev won't disappear in between.
2176  */
2177 static struct team *team_nl_team_get(struct genl_info *info)
2178 {
2179         struct net *net = genl_info_net(info);
2180         int ifindex;
2181         struct net_device *dev;
2182         struct team *team;
2183
2184         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2185                 return NULL;
2186
2187         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2188         dev = dev_get_by_index(net, ifindex);
2189         if (!dev || dev->netdev_ops != &team_netdev_ops) {
2190                 if (dev)
2191                         dev_put(dev);
2192                 return NULL;
2193         }
2194
2195         team = netdev_priv(dev);
2196         mutex_lock(&team->lock);
2197         return team;
2198 }
2199
2200 static void team_nl_team_put(struct team *team)
2201 {
2202         mutex_unlock(&team->lock);
2203         dev_put(team->dev);
2204 }
2205
2206 typedef int team_nl_send_func_t(struct sk_buff *skb,
2207                                 struct team *team, u32 portid);
2208
2209 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2210 {
2211         return genlmsg_unicast(dev_net(team->dev), skb, portid);
2212 }
2213
2214 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2215                                        struct team_option_inst *opt_inst)
2216 {
2217         struct nlattr *option_item;
2218         struct team_option *option = opt_inst->option;
2219         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2220         struct team_gsetter_ctx ctx;
2221         int err;
2222
2223         ctx.info = opt_inst_info;
2224         err = team_option_get(team, opt_inst, &ctx);
2225         if (err)
2226                 return err;
2227
2228         option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2229         if (!option_item)
2230                 return -EMSGSIZE;
2231
2232         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2233                 goto nest_cancel;
2234         if (opt_inst_info->port &&
2235             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2236                         opt_inst_info->port->dev->ifindex))
2237                 goto nest_cancel;
2238         if (opt_inst->option->array_size &&
2239             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2240                         opt_inst_info->array_index))
2241                 goto nest_cancel;
2242
2243         switch (option->type) {
2244         case TEAM_OPTION_TYPE_U32:
2245                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2246                         goto nest_cancel;
2247                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2248                         goto nest_cancel;
2249                 break;
2250         case TEAM_OPTION_TYPE_STRING:
2251                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2252                         goto nest_cancel;
2253                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2254                                    ctx.data.str_val))
2255                         goto nest_cancel;
2256                 break;
2257         case TEAM_OPTION_TYPE_BINARY:
2258                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2259                         goto nest_cancel;
2260                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2261                             ctx.data.bin_val.ptr))
2262                         goto nest_cancel;
2263                 break;
2264         case TEAM_OPTION_TYPE_BOOL:
2265                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2266                         goto nest_cancel;
2267                 if (ctx.data.bool_val &&
2268                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2269                         goto nest_cancel;
2270                 break;
2271         case TEAM_OPTION_TYPE_S32:
2272                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2273                         goto nest_cancel;
2274                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2275                         goto nest_cancel;
2276                 break;
2277         default:
2278                 BUG();
2279         }
2280         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2281                 goto nest_cancel;
2282         if (opt_inst->changed) {
2283                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2284                         goto nest_cancel;
2285                 opt_inst->changed = false;
2286         }
2287         nla_nest_end(skb, option_item);
2288         return 0;
2289
2290 nest_cancel:
2291         nla_nest_cancel(skb, option_item);
2292         return -EMSGSIZE;
2293 }
2294
2295 static int __send_and_alloc_skb(struct sk_buff **pskb,
2296                                 struct team *team, u32 portid,
2297                                 team_nl_send_func_t *send_func)
2298 {
2299         int err;
2300
2301         if (*pskb) {
2302                 err = send_func(*pskb, team, portid);
2303                 if (err)
2304                         return err;
2305         }
2306         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2307         if (!*pskb)
2308                 return -ENOMEM;
2309         return 0;
2310 }
2311
2312 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2313                                     int flags, team_nl_send_func_t *send_func,
2314                                     struct list_head *sel_opt_inst_list)
2315 {
2316         struct nlattr *option_list;
2317         struct nlmsghdr *nlh;
2318         void *hdr;
2319         struct team_option_inst *opt_inst;
2320         int err;
2321         struct sk_buff *skb = NULL;
2322         bool incomplete;
2323         int i;
2324
2325         opt_inst = list_first_entry(sel_opt_inst_list,
2326                                     struct team_option_inst, tmp_list);
2327
2328 start_again:
2329         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2330         if (err)
2331                 return err;
2332
2333         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2334                           TEAM_CMD_OPTIONS_GET);
2335         if (!hdr)
2336                 return -EMSGSIZE;
2337
2338         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2339                 goto nla_put_failure;
2340         option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2341         if (!option_list)
2342                 goto nla_put_failure;
2343
2344         i = 0;
2345         incomplete = false;
2346         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2347                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2348                 if (err) {
2349                         if (err == -EMSGSIZE) {
2350                                 if (!i)
2351                                         goto errout;
2352                                 incomplete = true;
2353                                 break;
2354                         }
2355                         goto errout;
2356                 }
2357                 i++;
2358         }
2359
2360         nla_nest_end(skb, option_list);
2361         genlmsg_end(skb, hdr);
2362         if (incomplete)
2363                 goto start_again;
2364
2365 send_done:
2366         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2367         if (!nlh) {
2368                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2369                 if (err)
2370                         goto errout;
2371                 goto send_done;
2372         }
2373
2374         return send_func(skb, team, portid);
2375
2376 nla_put_failure:
2377         err = -EMSGSIZE;
2378 errout:
2379         genlmsg_cancel(skb, hdr);
2380         nlmsg_free(skb);
2381         return err;
2382 }
2383
2384 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2385 {
2386         struct team *team;
2387         struct team_option_inst *opt_inst;
2388         int err;
2389         LIST_HEAD(sel_opt_inst_list);
2390
2391         team = team_nl_team_get(info);
2392         if (!team)
2393                 return -EINVAL;
2394
2395         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2396                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2397         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2398                                        NLM_F_ACK, team_nl_send_unicast,
2399                                        &sel_opt_inst_list);
2400
2401         team_nl_team_put(team);
2402
2403         return err;
2404 }
2405
2406 static int team_nl_send_event_options_get(struct team *team,
2407                                           struct list_head *sel_opt_inst_list);
2408
2409 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2410 {
2411         struct team *team;
2412         int err = 0;
2413         int i;
2414         struct nlattr *nl_option;
2415         LIST_HEAD(opt_inst_list);
2416
2417         team = team_nl_team_get(info);
2418         if (!team)
2419                 return -EINVAL;
2420
2421         err = -EINVAL;
2422         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2423                 err = -EINVAL;
2424                 goto team_put;
2425         }
2426
2427         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2428                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2429                 struct nlattr *attr;
2430                 struct nlattr *attr_data;
2431                 enum team_option_type opt_type;
2432                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2433                 u32 opt_array_index = 0;
2434                 bool opt_is_array = false;
2435                 struct team_option_inst *opt_inst;
2436                 char *opt_name;
2437                 bool opt_found = false;
2438
2439                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2440                         err = -EINVAL;
2441                         goto team_put;
2442                 }
2443                 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2444                                        nl_option, team_nl_option_policy);
2445                 if (err)
2446                         goto team_put;
2447                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2448                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2449                         err = -EINVAL;
2450                         goto team_put;
2451                 }
2452                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2453                 case NLA_U32:
2454                         opt_type = TEAM_OPTION_TYPE_U32;
2455                         break;
2456                 case NLA_STRING:
2457                         opt_type = TEAM_OPTION_TYPE_STRING;
2458                         break;
2459                 case NLA_BINARY:
2460                         opt_type = TEAM_OPTION_TYPE_BINARY;
2461                         break;
2462                 case NLA_FLAG:
2463                         opt_type = TEAM_OPTION_TYPE_BOOL;
2464                         break;
2465                 case NLA_S32:
2466                         opt_type = TEAM_OPTION_TYPE_S32;
2467                         break;
2468                 default:
2469                         goto team_put;
2470                 }
2471
2472                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2473                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2474                         err = -EINVAL;
2475                         goto team_put;
2476                 }
2477
2478                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2479                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2480                 if (attr)
2481                         opt_port_ifindex = nla_get_u32(attr);
2482
2483                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2484                 if (attr) {
2485                         opt_is_array = true;
2486                         opt_array_index = nla_get_u32(attr);
2487                 }
2488
2489                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2490                         struct team_option *option = opt_inst->option;
2491                         struct team_gsetter_ctx ctx;
2492                         struct team_option_inst_info *opt_inst_info;
2493                         int tmp_ifindex;
2494
2495                         opt_inst_info = &opt_inst->info;
2496                         tmp_ifindex = opt_inst_info->port ?
2497                                       opt_inst_info->port->dev->ifindex : 0;
2498                         if (option->type != opt_type ||
2499                             strcmp(option->name, opt_name) ||
2500                             tmp_ifindex != opt_port_ifindex ||
2501                             (option->array_size && !opt_is_array) ||
2502                             opt_inst_info->array_index != opt_array_index)
2503                                 continue;
2504                         opt_found = true;
2505                         ctx.info = opt_inst_info;
2506                         switch (opt_type) {
2507                         case TEAM_OPTION_TYPE_U32:
2508                                 ctx.data.u32_val = nla_get_u32(attr_data);
2509                                 break;
2510                         case TEAM_OPTION_TYPE_STRING:
2511                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2512                                         err = -EINVAL;
2513                                         goto team_put;
2514                                 }
2515                                 ctx.data.str_val = nla_data(attr_data);
2516                                 break;
2517                         case TEAM_OPTION_TYPE_BINARY:
2518                                 ctx.data.bin_val.len = nla_len(attr_data);
2519                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2520                                 break;
2521                         case TEAM_OPTION_TYPE_BOOL:
2522                                 ctx.data.bool_val = attr_data ? true : false;
2523                                 break;
2524                         case TEAM_OPTION_TYPE_S32:
2525                                 ctx.data.s32_val = nla_get_s32(attr_data);
2526                                 break;
2527                         default:
2528                                 BUG();
2529                         }
2530                         err = team_option_set(team, opt_inst, &ctx);
2531                         if (err)
2532                                 goto team_put;
2533                         opt_inst->changed = true;
2534                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2535                 }
2536                 if (!opt_found) {
2537                         err = -ENOENT;
2538                         goto team_put;
2539                 }
2540         }
2541
2542         err = team_nl_send_event_options_get(team, &opt_inst_list);
2543
2544 team_put:
2545         team_nl_team_put(team);
2546
2547         return err;
2548 }
2549
2550 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2551                                      struct team_port *port)
2552 {
2553         struct nlattr *port_item;
2554
2555         port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2556         if (!port_item)
2557                 goto nest_cancel;
2558         if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2559                 goto nest_cancel;
2560         if (port->changed) {
2561                 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2562                         goto nest_cancel;
2563                 port->changed = false;
2564         }
2565         if ((port->removed &&
2566              nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2567             (port->state.linkup &&
2568              nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2569             nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2570             nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2571                 goto nest_cancel;
2572         nla_nest_end(skb, port_item);
2573         return 0;
2574
2575 nest_cancel:
2576         nla_nest_cancel(skb, port_item);
2577         return -EMSGSIZE;
2578 }
2579
2580 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2581                                       int flags, team_nl_send_func_t *send_func,
2582                                       struct team_port *one_port)
2583 {
2584         struct nlattr *port_list;
2585         struct nlmsghdr *nlh;
2586         void *hdr;
2587         struct team_port *port;
2588         int err;
2589         struct sk_buff *skb = NULL;
2590         bool incomplete;
2591         int i;
2592
2593         port = list_first_entry_or_null(&team->port_list,
2594                                         struct team_port, list);
2595
2596 start_again:
2597         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2598         if (err)
2599                 return err;
2600
2601         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2602                           TEAM_CMD_PORT_LIST_GET);
2603         if (!hdr)
2604                 return -EMSGSIZE;
2605
2606         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2607                 goto nla_put_failure;
2608         port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2609         if (!port_list)
2610                 goto nla_put_failure;
2611
2612         i = 0;
2613         incomplete = false;
2614
2615         /* If one port is selected, called wants to send port list containing
2616          * only this port. Otherwise go through all listed ports and send all
2617          */
2618         if (one_port) {
2619                 err = team_nl_fill_one_port_get(skb, one_port);
2620                 if (err)
2621                         goto errout;
2622         } else if (port) {
2623                 list_for_each_entry_from(port, &team->port_list, list) {
2624                         err = team_nl_fill_one_port_get(skb, port);
2625                         if (err) {
2626                                 if (err == -EMSGSIZE) {
2627                                         if (!i)
2628                                                 goto errout;
2629                                         incomplete = true;
2630                                         break;
2631                                 }
2632                                 goto errout;
2633                         }
2634                         i++;
2635                 }
2636         }
2637
2638         nla_nest_end(skb, port_list);
2639         genlmsg_end(skb, hdr);
2640         if (incomplete)
2641                 goto start_again;
2642
2643 send_done:
2644         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2645         if (!nlh) {
2646                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2647                 if (err)
2648                         goto errout;
2649                 goto send_done;
2650         }
2651
2652         return send_func(skb, team, portid);
2653
2654 nla_put_failure:
2655         err = -EMSGSIZE;
2656 errout:
2657         genlmsg_cancel(skb, hdr);
2658         nlmsg_free(skb);
2659         return err;
2660 }
2661
2662 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2663                                      struct genl_info *info)
2664 {
2665         struct team *team;
2666         int err;
2667
2668         team = team_nl_team_get(info);
2669         if (!team)
2670                 return -EINVAL;
2671
2672         err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2673                                          NLM_F_ACK, team_nl_send_unicast, NULL);
2674
2675         team_nl_team_put(team);
2676
2677         return err;
2678 }
2679
2680 static const struct genl_ops team_nl_ops[] = {
2681         {
2682                 .cmd = TEAM_CMD_NOOP,
2683                 .doit = team_nl_cmd_noop,
2684                 .policy = team_nl_policy,
2685         },
2686         {
2687                 .cmd = TEAM_CMD_OPTIONS_SET,
2688                 .doit = team_nl_cmd_options_set,
2689                 .policy = team_nl_policy,
2690                 .flags = GENL_ADMIN_PERM,
2691         },
2692         {
2693                 .cmd = TEAM_CMD_OPTIONS_GET,
2694                 .doit = team_nl_cmd_options_get,
2695                 .policy = team_nl_policy,
2696                 .flags = GENL_ADMIN_PERM,
2697         },
2698         {
2699                 .cmd = TEAM_CMD_PORT_LIST_GET,
2700                 .doit = team_nl_cmd_port_list_get,
2701                 .policy = team_nl_policy,
2702                 .flags = GENL_ADMIN_PERM,
2703         },
2704 };
2705
2706 static const struct genl_multicast_group team_nl_mcgrps[] = {
2707         { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2708 };
2709
2710 static int team_nl_send_multicast(struct sk_buff *skb,
2711                                   struct team *team, u32 portid)
2712 {
2713         return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2714                                        skb, 0, 0, GFP_KERNEL);
2715 }
2716
2717 static int team_nl_send_event_options_get(struct team *team,
2718                                           struct list_head *sel_opt_inst_list)
2719 {
2720         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2721                                         sel_opt_inst_list);
2722 }
2723
2724 static int team_nl_send_event_port_get(struct team *team,
2725                                        struct team_port *port)
2726 {
2727         return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2728                                           port);
2729 }
2730
2731 static int team_nl_init(void)
2732 {
2733         return genl_register_family_with_ops_groups(&team_nl_family, team_nl_ops,
2734                                                     team_nl_mcgrps);
2735 }
2736
2737 static void team_nl_fini(void)
2738 {
2739         genl_unregister_family(&team_nl_family);
2740 }
2741
2742
2743 /******************
2744  * Change checkers
2745  ******************/
2746
2747 static void __team_options_change_check(struct team *team)
2748 {
2749         int err;
2750         struct team_option_inst *opt_inst;
2751         LIST_HEAD(sel_opt_inst_list);
2752
2753         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2754                 if (opt_inst->changed)
2755                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2756         }
2757         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2758         if (err && err != -ESRCH)
2759                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2760                             err);
2761 }
2762
2763 /* rtnl lock is held */
2764
2765 static void __team_port_change_send(struct team_port *port, bool linkup)
2766 {
2767         int err;
2768
2769         port->changed = true;
2770         port->state.linkup = linkup;
2771         team_refresh_port_linkup(port);
2772         if (linkup) {
2773                 struct ethtool_cmd ecmd;
2774
2775                 err = __ethtool_get_settings(port->dev, &ecmd);
2776                 if (!err) {
2777                         port->state.speed = ethtool_cmd_speed(&ecmd);
2778                         port->state.duplex = ecmd.duplex;
2779                         goto send_event;
2780                 }
2781         }
2782         port->state.speed = 0;
2783         port->state.duplex = 0;
2784
2785 send_event:
2786         err = team_nl_send_event_port_get(port->team, port);
2787         if (err && err != -ESRCH)
2788                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2789                             port->dev->name, err);
2790
2791 }
2792
2793 static void __team_carrier_check(struct team *team)
2794 {
2795         struct team_port *port;
2796         bool team_linkup;
2797
2798         if (team->user_carrier_enabled)
2799                 return;
2800
2801         team_linkup = false;
2802         list_for_each_entry(port, &team->port_list, list) {
2803                 if (port->linkup) {
2804                         team_linkup = true;
2805                         break;
2806                 }
2807         }
2808
2809         if (team_linkup)
2810                 netif_carrier_on(team->dev);
2811         else
2812                 netif_carrier_off(team->dev);
2813 }
2814
2815 static void __team_port_change_check(struct team_port *port, bool linkup)
2816 {
2817         if (port->state.linkup != linkup)
2818                 __team_port_change_send(port, linkup);
2819         __team_carrier_check(port->team);
2820 }
2821
2822 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2823 {
2824         __team_port_change_send(port, linkup);
2825         __team_carrier_check(port->team);
2826 }
2827
2828 static void __team_port_change_port_removed(struct team_port *port)
2829 {
2830         port->removed = true;
2831         __team_port_change_send(port, false);
2832         __team_carrier_check(port->team);
2833 }
2834
2835 static void team_port_change_check(struct team_port *port, bool linkup)
2836 {
2837         struct team *team = port->team;
2838
2839         mutex_lock(&team->lock);
2840         __team_port_change_check(port, linkup);
2841         mutex_unlock(&team->lock);
2842 }
2843
2844
2845 /************************************
2846  * Net device notifier event handler
2847  ************************************/
2848
2849 static int team_device_event(struct notifier_block *unused,
2850                              unsigned long event, void *ptr)
2851 {
2852         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2853         struct team_port *port;
2854
2855         port = team_port_get_rtnl(dev);
2856         if (!port)
2857                 return NOTIFY_DONE;
2858
2859         switch (event) {
2860         case NETDEV_UP:
2861                 if (netif_carrier_ok(dev))
2862                         team_port_change_check(port, true);
2863                 break;
2864         case NETDEV_DOWN:
2865                 team_port_change_check(port, false);
2866                 break;
2867         case NETDEV_CHANGE:
2868                 if (netif_running(port->dev))
2869                         team_port_change_check(port,
2870                                                !!netif_carrier_ok(port->dev));
2871                 break;
2872         case NETDEV_UNREGISTER:
2873                 team_del_slave(port->team->dev, dev);
2874                 break;
2875         case NETDEV_FEAT_CHANGE:
2876                 team_compute_features(port->team);
2877                 break;
2878         case NETDEV_PRECHANGEMTU:
2879                 /* Forbid to change mtu of underlaying device */
2880                 if (!port->team->port_mtu_change_allowed)
2881                         return NOTIFY_BAD;
2882                 break;
2883         case NETDEV_PRE_TYPE_CHANGE:
2884                 /* Forbid to change type of underlaying device */
2885                 return NOTIFY_BAD;
2886         case NETDEV_RESEND_IGMP:
2887                 /* Propagate to master device */
2888                 call_netdevice_notifiers(event, port->team->dev);
2889                 break;
2890         }
2891         return NOTIFY_DONE;
2892 }
2893
2894 static struct notifier_block team_notifier_block __read_mostly = {
2895         .notifier_call = team_device_event,
2896 };
2897
2898
2899 /***********************
2900  * Module init and exit
2901  ***********************/
2902
2903 static int __init team_module_init(void)
2904 {
2905         int err;
2906
2907         register_netdevice_notifier(&team_notifier_block);
2908
2909         err = rtnl_link_register(&team_link_ops);
2910         if (err)
2911                 goto err_rtnl_reg;
2912
2913         err = team_nl_init();
2914         if (err)
2915                 goto err_nl_init;
2916
2917         return 0;
2918
2919 err_nl_init:
2920         rtnl_link_unregister(&team_link_ops);
2921
2922 err_rtnl_reg:
2923         unregister_netdevice_notifier(&team_notifier_block);
2924
2925         return err;
2926 }
2927
2928 static void __exit team_module_exit(void)
2929 {
2930         team_nl_fini();
2931         rtnl_link_unregister(&team_link_ops);
2932         unregister_netdevice_notifier(&team_notifier_block);
2933 }
2934
2935 module_init(team_module_init);
2936 module_exit(team_module_exit);
2937
2938 MODULE_LICENSE("GPL v2");
2939 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2940 MODULE_DESCRIPTION("Ethernet team device driver");
2941 MODULE_ALIAS_RTNL_LINK(DRV_NAME);