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