drivers/net/team/team.c

   1 /*
   2  * drivers/net/team/team.c - Network team device driver
   3  * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/types.h>
  13 #include <linux/module.h>
  14 #include <linux/init.h>
  15 #include <linux/slab.h>
  16 #include <linux/rcupdate.h>
  17 #include <linux/errno.h>
  18 #include <linux/ctype.h>
  19 #include <linux/notifier.h>
  20 #include <linux/netdevice.h>
  21 #include <linux/netpoll.h>
  22 #include <linux/if_vlan.h>
  23 #include <linux/if_arp.h>
  24 #include <linux/socket.h>
  25 #include <linux/etherdevice.h>
  26 #include <linux/rtnetlink.h>
  27 #include <net/rtnetlink.h>
  28 #include <net/genetlink.h>
  29 #include <net/netlink.h>
  30 #include <net/sch_generic.h>
  31 #include <net/switchdev.h>
  32 #include <generated/utsrelease.h>
  33 #include <linux/if_team.h>
  34
  35 #define DRV_NAME "team"
  36
  37
  38 /**********
  39  * Helpers
  40  **********/
  41
  42 #define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT)
  43
  44 static struct team_port *team_port_get_rcu(const struct net_device *dev)
  45 {
  46         return rcu_dereference(dev->rx_handler_data);
  47 }
  48
  49 static struct team_port *team_port_get_rtnl(const struct net_device *dev)
  50 {
  51         struct team_port *port = rtnl_dereference(dev->rx_handler_data);
  52
  53         return team_port_exists(dev) ? port : NULL;
  54 }
  55
  56 /*
  57  * Since the ability to change device address for open port device is tested in
  58  * team_port_add, this function can be called without control of return value
  59  */
  60 static int __set_port_dev_addr(struct net_device *port_dev,
  61                                const unsigned char *dev_addr)
  62 {
  63         struct sockaddr addr;
  64
  65         memcpy(addr.sa_data, dev_addr, port_dev->addr_len);
  66         addr.sa_family = port_dev->type;
  67         return dev_set_mac_address(port_dev, &addr);
  68 }
  69
  70 static int team_port_set_orig_dev_addr(struct team_port *port)
  71 {
  72         return __set_port_dev_addr(port->dev, port->orig.dev_addr);
  73 }
  74
  75 static int team_port_set_team_dev_addr(struct team *team,
  76                                        struct team_port *port)
  77 {
  78         return __set_port_dev_addr(port->dev, team->dev->dev_addr);
  79 }
  80
  81 int team_modeop_port_enter(struct team *team, struct team_port *port)
  82 {
  83         return team_port_set_team_dev_addr(team, port);
  84 }
  85 EXPORT_SYMBOL(team_modeop_port_enter);
  86
  87 void team_modeop_port_change_dev_addr(struct team *team,
  88                                       struct team_port *port)
  89 {
  90         team_port_set_team_dev_addr(team, port);
  91 }
  92 EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
  93
  94 static void team_refresh_port_linkup(struct team_port *port)
  95 {
  96         port->linkup = port->user.linkup_enabled ? port->user.linkup :
  97                                                    port->state.linkup;
  98 }
  99
 100
 101 /*******************
 102  * Options handling
 103  *******************/
 104
 105 struct team_option_inst { /* One for each option instance */
 106         struct list_head list;
 107         struct list_head tmp_list;
 108         struct team_option *option;
 109         struct team_option_inst_info info;
 110         bool changed;
 111         bool removed;
 112 };
 113
 114 static struct team_option *__team_find_option(struct team *team,
 115                                               const char *opt_name)
 116 {
 117         struct team_option *option;
 118
 119         list_for_each_entry(option, &team->option_list, list) {
 120                 if (strcmp(option->name, opt_name) == 0)
 121                         return option;
 122         }
 123         return NULL;
 124 }
 125
 126 static void __team_option_inst_del(struct team_option_inst *opt_inst)
 127 {
 128         list_del(&opt_inst->list);
 129         kfree(opt_inst);
 130 }
 131
 132 static void __team_option_inst_del_option(struct team *team,
 133                                           struct team_option *option)
 134 {
 135         struct team_option_inst *opt_inst, *tmp;
 136
 137         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 138                 if (opt_inst->option == option)
 139                         __team_option_inst_del(opt_inst);
 140         }
 141 }
 142
 143 static int __team_option_inst_add(struct team *team, struct team_option *option,
 144                                   struct team_port *port)
 145 {
 146         struct team_option_inst *opt_inst;
 147         unsigned int array_size;
 148         unsigned int i;
 149         int err;
 150
 151         array_size = option->array_size;
 152         if (!array_size)
 153                 array_size = 1; /* No array but still need one instance */
 154
 155         for (i = 0; i < array_size; i++) {
 156                 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
 157                 if (!opt_inst)
 158                         return -ENOMEM;
 159                 opt_inst->option = option;
 160                 opt_inst->info.port = port;
 161                 opt_inst->info.array_index = i;
 162                 opt_inst->changed = true;
 163                 opt_inst->removed = false;
 164                 list_add_tail(&opt_inst->list, &team->option_inst_list);
 165                 if (option->init) {
 166                         err = option->init(team, &opt_inst->info);
 167                         if (err)
 168                                 return err;
 169                 }
 170
 171         }
 172         return 0;
 173 }
 174
 175 static int __team_option_inst_add_option(struct team *team,
 176                                          struct team_option *option)
 177 {
 178         int err;
 179
 180         if (!option->per_port) {
 181                 err = __team_option_inst_add(team, option, NULL);
 182                 if (err)
 183                         goto inst_del_option;
 184         }
 185         return 0;
 186
 187 inst_del_option:
 188         __team_option_inst_del_option(team, option);
 189         return err;
 190 }
 191
 192 static void __team_option_inst_mark_removed_option(struct team *team,
 193                                                    struct team_option *option)
 194 {
 195         struct team_option_inst *opt_inst;
 196
 197         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 198                 if (opt_inst->option == option) {
 199                         opt_inst->changed = true;
 200                         opt_inst->removed = true;
 201                 }
 202         }
 203 }
 204
 205 static void __team_option_inst_del_port(struct team *team,
 206                                         struct team_port *port)
 207 {
 208         struct team_option_inst *opt_inst, *tmp;
 209
 210         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 211                 if (opt_inst->option->per_port &&
 212                     opt_inst->info.port == port)
 213                         __team_option_inst_del(opt_inst);
 214         }
 215 }
 216
 217 static int __team_option_inst_add_port(struct team *team,
 218                                        struct team_port *port)
 219 {
 220         struct team_option *option;
 221         int err;
 222
 223         list_for_each_entry(option, &team->option_list, list) {
 224                 if (!option->per_port)
 225                         continue;
 226                 err = __team_option_inst_add(team, option, port);
 227                 if (err)
 228                         goto inst_del_port;
 229         }
 230         return 0;
 231
 232 inst_del_port:
 233         __team_option_inst_del_port(team, port);
 234         return err;
 235 }
 236
 237 static void __team_option_inst_mark_removed_port(struct team *team,
 238                                                  struct team_port *port)
 239 {
 240         struct team_option_inst *opt_inst;
 241
 242         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 243                 if (opt_inst->info.port == port) {
 244                         opt_inst->changed = true;
 245                         opt_inst->removed = true;
 246                 }
 247         }
 248 }
 249
 250 static int __team_options_register(struct team *team,
 251                                    const struct team_option *option,
 252                                    size_t option_count)
 253 {
 254         int i;
 255         struct team_option **dst_opts;
 256         int err;
 257
 258         dst_opts = kzalloc(sizeof(struct team_option *) * option_count,
 259                            GFP_KERNEL);
 260         if (!dst_opts)
 261                 return -ENOMEM;
 262         for (i = 0; i < option_count; i++, option++) {
 263                 if (__team_find_option(team, option->name)) {
 264                         err = -EEXIST;
 265                         goto alloc_rollback;
 266                 }
 267                 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
 268                 if (!dst_opts[i]) {
 269                         err = -ENOMEM;
 270                         goto alloc_rollback;
 271                 }
 272         }
 273
 274         for (i = 0; i < option_count; i++) {
 275                 err = __team_option_inst_add_option(team, dst_opts[i]);
 276                 if (err)
 277                         goto inst_rollback;
 278                 list_add_tail(&dst_opts[i]->list, &team->option_list);
 279         }
 280
 281         kfree(dst_opts);
 282         return 0;
 283
 284 inst_rollback:
 285         for (i--; i >= 0; i--)
 286                 __team_option_inst_del_option(team, dst_opts[i]);
 287
 288         i = option_count - 1;
 289 alloc_rollback:
 290         for (i--; i >= 0; i--)
 291                 kfree(dst_opts[i]);
 292
 293         kfree(dst_opts);
 294         return err;
 295 }
 296
 297 static void __team_options_mark_removed(struct team *team,
 298                                         const struct team_option *option,
 299                                         size_t option_count)
 300 {
 301         int i;
 302
 303         for (i = 0; i < option_count; i++, option++) {
 304                 struct team_option *del_opt;
 305
 306                 del_opt = __team_find_option(team, option->name);
 307                 if (del_opt)
 308                         __team_option_inst_mark_removed_option(team, del_opt);
 309         }
 310 }
 311
 312 static void __team_options_unregister(struct team *team,
 313                                       const struct team_option *option,
 314                                       size_t option_count)
 315 {
 316         int i;
 317
 318         for (i = 0; i < option_count; i++, option++) {
 319                 struct team_option *del_opt;
 320
 321                 del_opt = __team_find_option(team, option->name);
 322                 if (del_opt) {
 323                         __team_option_inst_del_option(team, del_opt);
 324                         list_del(&del_opt->list);
 325                         kfree(del_opt);
 326                 }
 327         }
 328 }
 329
 330 static void __team_options_change_check(struct team *team);
 331
 332 int team_options_register(struct team *team,
 333                           const struct team_option *option,
 334                           size_t option_count)
 335 {
 336         int err;
 337
 338         err = __team_options_register(team, option, option_count);
 339         if (err)
 340                 return err;
 341         __team_options_change_check(team);
 342         return 0;
 343 }
 344 EXPORT_SYMBOL(team_options_register);
 345
 346 void team_options_unregister(struct team *team,
 347                              const struct team_option *option,
 348                              size_t option_count)
 349 {
 350         __team_options_mark_removed(team, option, option_count);
 351         __team_options_change_check(team);
 352         __team_options_unregister(team, option, option_count);
 353 }
 354 EXPORT_SYMBOL(team_options_unregister);
 355
 356 static int team_option_get(struct team *team,
 357                            struct team_option_inst *opt_inst,
 358                            struct team_gsetter_ctx *ctx)
 359 {
 360         if (!opt_inst->option->getter)
 361                 return -EOPNOTSUPP;
 362         return opt_inst->option->getter(team, ctx);
 363 }
 364
 365 static int team_option_set(struct team *team,
 366                            struct team_option_inst *opt_inst,
 367                            struct team_gsetter_ctx *ctx)
 368 {
 369         if (!opt_inst->option->setter)
 370                 return -EOPNOTSUPP;
 371         return opt_inst->option->setter(team, ctx);
 372 }
 373
 374 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
 375 {
 376         struct team_option_inst *opt_inst;
 377
 378         opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
 379         opt_inst->changed = true;
 380 }
 381 EXPORT_SYMBOL(team_option_inst_set_change);
 382
 383 void team_options_change_check(struct team *team)
 384 {
 385         __team_options_change_check(team);
 386 }
 387 EXPORT_SYMBOL(team_options_change_check);
 388
 389
 390 /****************
 391  * Mode handling
 392  ****************/
 393
 394 static LIST_HEAD(mode_list);
 395 static DEFINE_SPINLOCK(mode_list_lock);
 396
 397 struct team_mode_item {
 398         struct list_head list;
 399         const struct team_mode *mode;
 400 };
 401
 402 static struct team_mode_item *__find_mode(const char *kind)
 403 {
 404         struct team_mode_item *mitem;
 405
 406         list_for_each_entry(mitem, &mode_list, list) {
 407                 if (strcmp(mitem->mode->kind, kind) == 0)
 408                         return mitem;
 409         }
 410         return NULL;
 411 }
 412
 413 static bool is_good_mode_name(const char *name)
 414 {
 415         while (*name != '\0') {
 416                 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
 417                         return false;
 418                 name++;
 419         }
 420         return true;
 421 }
 422
 423 int team_mode_register(const struct team_mode *mode)
 424 {
 425         int err = 0;
 426         struct team_mode_item *mitem;
 427
 428         if (!is_good_mode_name(mode->kind) ||
 429             mode->priv_size > TEAM_MODE_PRIV_SIZE)
 430                 return -EINVAL;
 431
 432         mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
 433         if (!mitem)
 434                 return -ENOMEM;
 435
 436         spin_lock(&mode_list_lock);
 437         if (__find_mode(mode->kind)) {
 438                 err = -EEXIST;
 439                 kfree(mitem);
 440                 goto unlock;
 441         }
 442         mitem->mode = mode;
 443         list_add_tail(&mitem->list, &mode_list);
 444 unlock:
 445         spin_unlock(&mode_list_lock);
 446         return err;
 447 }
 448 EXPORT_SYMBOL(team_mode_register);
 449
 450 void team_mode_unregister(const struct team_mode *mode)
 451 {
 452         struct team_mode_item *mitem;
 453
 454         spin_lock(&mode_list_lock);
 455         mitem = __find_mode(mode->kind);
 456         if (mitem) {
 457                 list_del_init(&mitem->list);
 458                 kfree(mitem);
 459         }
 460         spin_unlock(&mode_list_lock);
 461 }
 462 EXPORT_SYMBOL(team_mode_unregister);
 463
 464 static const struct team_mode *team_mode_get(const char *kind)
 465 {
 466         struct team_mode_item *mitem;
 467         const struct team_mode *mode = NULL;
 468
 469         spin_lock(&mode_list_lock);
 470         mitem = __find_mode(kind);
 471         if (!mitem) {
 472                 spin_unlock(&mode_list_lock);
 473                 request_module("team-mode-%s", kind);
 474                 spin_lock(&mode_list_lock);
 475                 mitem = __find_mode(kind);
 476         }
 477         if (mitem) {
 478                 mode = mitem->mode;
 479                 if (!try_module_get(mode->owner))
 480                         mode = NULL;
 481         }
 482
 483         spin_unlock(&mode_list_lock);
 484         return mode;
 485 }
 486
 487 static void team_mode_put(const struct team_mode *mode)
 488 {
 489         module_put(mode->owner);
 490 }
 491
 492 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
 493 {
 494         dev_kfree_skb_any(skb);
 495         return false;
 496 }
 497
 498 static rx_handler_result_t team_dummy_receive(struct team *team,
 499                                               struct team_port *port,
 500                                               struct sk_buff *skb)
 501 {
 502         return RX_HANDLER_ANOTHER;
 503 }
 504
 505 static const struct team_mode __team_no_mode = {
 506         .kind           = "*NOMODE*",
 507 };
 508
 509 static bool team_is_mode_set(struct team *team)
 510 {
 511         return team->mode != &__team_no_mode;
 512 }
 513
 514 static void team_set_no_mode(struct team *team)
 515 {
 516         team->user_carrier_enabled = false;
 517         team->mode = &__team_no_mode;
 518 }
 519
 520 static void team_adjust_ops(struct team *team)
 521 {
 522         /*
 523          * To avoid checks in rx/tx skb paths, ensure here that non-null and
 524          * correct ops are always set.
 525          */
 526
 527         if (!team->en_port_count || !team_is_mode_set(team) ||
 528             !team->mode->ops->transmit)
 529                 team->ops.transmit = team_dummy_transmit;
 530         else
 531                 team->ops.transmit = team->mode->ops->transmit;
 532
 533         if (!team->en_port_count || !team_is_mode_set(team) ||
 534             !team->mode->ops->receive)
 535                 team->ops.receive = team_dummy_receive;
 536         else
 537                 team->ops.receive = team->mode->ops->receive;
 538 }
 539
 540 /*
 541  * We can benefit from the fact that it's ensured no port is present
 542  * at the time of mode change. Therefore no packets are in fly so there's no
 543  * need to set mode operations in any special way.
 544  */
 545 static int __team_change_mode(struct team *team,
 546                               const struct team_mode *new_mode)
 547 {
 548         /* Check if mode was previously set and do cleanup if so */
 549         if (team_is_mode_set(team)) {
 550                 void (*exit_op)(struct team *team) = team->ops.exit;
 551
 552                 /* Clear ops area so no callback is called any longer */
 553                 memset(&team->ops, 0, sizeof(struct team_mode_ops));
 554                 team_adjust_ops(team);
 555
 556                 if (exit_op)
 557                         exit_op(team);
 558                 team_mode_put(team->mode);
 559                 team_set_no_mode(team);
 560                 /* zero private data area */
 561                 memset(&team->mode_priv, 0,
 562                        sizeof(struct team) - offsetof(struct team, mode_priv));
 563         }
 564
 565         if (!new_mode)
 566                 return 0;
 567
 568         if (new_mode->ops->init) {
 569                 int err;
 570
 571                 err = new_mode->ops->init(team);
 572                 if (err)
 573                         return err;
 574         }
 575
 576         team->mode = new_mode;
 577         memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
 578         team_adjust_ops(team);
 579
 580         return 0;
 581 }
 582
 583 static int team_change_mode(struct team *team, const char *kind)
 584 {
 585         const struct team_mode *new_mode;
 586         struct net_device *dev = team->dev;
 587         int err;
 588
 589         if (!list_empty(&team->port_list)) {
 590                 netdev_err(dev, "No ports can be present during mode change\n");
 591                 return -EBUSY;
 592         }
 593
 594         if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
 595                 netdev_err(dev, "Unable to change to the same mode the team is in\n");
 596                 return -EINVAL;
 597         }
 598
 599         new_mode = team_mode_get(kind);
 600         if (!new_mode) {
 601                 netdev_err(dev, "Mode \"%s\" not found\n", kind);
 602                 return -EINVAL;
 603         }
 604
 605         err = __team_change_mode(team, new_mode);
 606         if (err) {
 607                 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
 608                 team_mode_put(new_mode);
 609                 return err;
 610         }
 611
 612         netdev_info(dev, "Mode changed to \"%s\"\n", kind);
 613         return 0;
 614 }
 615
 616
 617 /*********************
 618  * Peers notification
 619  *********************/
 620
 621 static void team_notify_peers_work(struct work_struct *work)
 622 {
 623         struct team *team;
 624         int val;
 625
 626         team = container_of(work, struct team, notify_peers.dw.work);
 627
 628         if (!rtnl_trylock()) {
 629                 schedule_delayed_work(&team->notify_peers.dw, 0);
 630                 return;
 631         }
 632         val = atomic_dec_if_positive(&team->notify_peers.count_pending);
 633         if (val < 0) {
 634                 rtnl_unlock();
 635                 return;
 636         }
 637         call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
 638         rtnl_unlock();
 639         if (val)
 640                 schedule_delayed_work(&team->notify_peers.dw,
 641                                       msecs_to_jiffies(team->notify_peers.interval));
 642 }
 643
 644 static void team_notify_peers(struct team *team)
 645 {
 646         if (!team->notify_peers.count || !netif_running(team->dev))
 647                 return;
 648         atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
 649         schedule_delayed_work(&team->notify_peers.dw, 0);
 650 }
 651
 652 static void team_notify_peers_init(struct team *team)
 653 {
 654         INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
 655 }
 656
 657 static void team_notify_peers_fini(struct team *team)
 658 {
 659         cancel_delayed_work_sync(&team->notify_peers.dw);
 660 }
 661
 662
 663 /*******************************
 664  * Send multicast group rejoins
 665  *******************************/
 666
 667 static void team_mcast_rejoin_work(struct work_struct *work)
 668 {
 669         struct team *team;
 670         int val;
 671
 672         team = container_of(work, struct team, mcast_rejoin.dw.work);
 673
 674         if (!rtnl_trylock()) {
 675                 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 676                 return;
 677         }
 678         val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending);
 679         if (val < 0) {
 680                 rtnl_unlock();
 681                 return;
 682         }
 683         call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
 684         rtnl_unlock();
 685         if (val)
 686                 schedule_delayed_work(&team->mcast_rejoin.dw,
 687                                       msecs_to_jiffies(team->mcast_rejoin.interval));
 688 }
 689
 690 static void team_mcast_rejoin(struct team *team)
 691 {
 692         if (!team->mcast_rejoin.count || !netif_running(team->dev))
 693                 return;
 694         atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
 695         schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 696 }
 697
 698 static void team_mcast_rejoin_init(struct team *team)
 699 {
 700         INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
 701 }
 702
 703 static void team_mcast_rejoin_fini(struct team *team)
 704 {
 705         cancel_delayed_work_sync(&team->mcast_rejoin.dw);
 706 }
 707
 708
 709 /************************
 710  * Rx path frame handler
 711  ************************/
 712
 713 /* note: already called with rcu_read_lock */
 714 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
 715 {
 716         struct sk_buff *skb = *pskb;
 717         struct team_port *port;
 718         struct team *team;
 719         rx_handler_result_t res;
 720
 721         skb = skb_share_check(skb, GFP_ATOMIC);
 722         if (!skb)
 723                 return RX_HANDLER_CONSUMED;
 724
 725         *pskb = skb;
 726
 727         port = team_port_get_rcu(skb->dev);
 728         team = port->team;
 729         if (!team_port_enabled(port)) {
 730                 /* allow exact match delivery for disabled ports */
 731                 res = RX_HANDLER_EXACT;
 732         } else {
 733                 res = team->ops.receive(team, port, skb);
 734         }
 735         if (res == RX_HANDLER_ANOTHER) {
 736                 struct team_pcpu_stats *pcpu_stats;
 737
 738                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
 739                 u64_stats_update_begin(&pcpu_stats->syncp);
 740                 pcpu_stats->rx_packets++;
 741                 pcpu_stats->rx_bytes += skb->len;
 742                 if (skb->pkt_type == PACKET_MULTICAST)
 743                         pcpu_stats->rx_multicast++;
 744                 u64_stats_update_end(&pcpu_stats->syncp);
 745
 746                 skb->dev = team->dev;
 747         } else {
 748                 this_cpu_inc(team->pcpu_stats->rx_dropped);
 749         }
 750
 751         return res;
 752 }
 753
 754
 755 /*************************************
 756  * Multiqueue Tx port select override
 757  *************************************/
 758
 759 static int team_queue_override_init(struct team *team)
 760 {
 761         struct list_head *listarr;
 762         unsigned int queue_cnt = team->dev->num_tx_queues - 1;
 763         unsigned int i;
 764
 765         if (!queue_cnt)
 766                 return 0;
 767         listarr = kmalloc(sizeof(struct list_head) * queue_cnt, GFP_KERNEL);
 768         if (!listarr)
 769                 return -ENOMEM;
 770         team->qom_lists = listarr;
 771         for (i = 0; i < queue_cnt; i++)
 772                 INIT_LIST_HEAD(listarr++);
 773         return 0;
 774 }
 775
 776 static void team_queue_override_fini(struct team *team)
 777 {
 778         kfree(team->qom_lists);
 779 }
 780
 781 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
 782 {
 783         return &team->qom_lists[queue_id - 1];
 784 }
 785
 786 /*
 787  * note: already called with rcu_read_lock
 788  */
 789 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
 790 {
 791         struct list_head *qom_list;
 792         struct team_port *port;
 793
 794         if (!team->queue_override_enabled || !skb->queue_mapping)
 795                 return false;
 796         qom_list = __team_get_qom_list(team, skb->queue_mapping);
 797         list_for_each_entry_rcu(port, qom_list, qom_list) {
 798                 if (!team_dev_queue_xmit(team, port, skb))
 799                         return true;
 800         }
 801         return false;
 802 }
 803
 804 static void __team_queue_override_port_del(struct team *team,
 805                                            struct team_port *port)
 806 {
 807         if (!port->queue_id)
 808                 return;
 809         list_del_rcu(&port->qom_list);
 810 }
 811
 812 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
 813                                                       struct team_port *cur)
 814 {
 815         if (port->priority < cur->priority)
 816                 return true;
 817         if (port->priority > cur->priority)
 818                 return false;
 819         if (port->index < cur->index)
 820                 return true;
 821         return false;
 822 }
 823
 824 static void __team_queue_override_port_add(struct team *team,
 825                                            struct team_port *port)
 826 {
 827         struct team_port *cur;
 828         struct list_head *qom_list;
 829         struct list_head *node;
 830
 831         if (!port->queue_id)
 832                 return;
 833         qom_list = __team_get_qom_list(team, port->queue_id);
 834         node = qom_list;
 835         list_for_each_entry(cur, qom_list, qom_list) {
 836                 if (team_queue_override_port_has_gt_prio_than(port, cur))
 837                         break;
 838                 node = &cur->qom_list;
 839         }
 840         list_add_tail_rcu(&port->qom_list, node);
 841 }
 842
 843 static void __team_queue_override_enabled_check(struct team *team)
 844 {
 845         struct team_port *port;
 846         bool enabled = false;
 847
 848         list_for_each_entry(port, &team->port_list, list) {
 849                 if (port->queue_id) {
 850                         enabled = true;
 851                         break;
 852                 }
 853         }
 854         if (enabled == team->queue_override_enabled)
 855                 return;
 856         netdev_dbg(team->dev, "%s queue override\n",
 857                    enabled ? "Enabling" : "Disabling");
 858         team->queue_override_enabled = enabled;
 859 }
 860
 861 static void team_queue_override_port_prio_changed(struct team *team,
 862                                                   struct team_port *port)
 863 {
 864         if (!port->queue_id || team_port_enabled(port))
 865                 return;
 866         __team_queue_override_port_del(team, port);
 867         __team_queue_override_port_add(team, port);
 868         __team_queue_override_enabled_check(team);
 869 }
 870
 871 static void team_queue_override_port_change_queue_id(struct team *team,
 872                                                      struct team_port *port,
 873                                                      u16 new_queue_id)
 874 {
 875         if (team_port_enabled(port)) {
 876                 __team_queue_override_port_del(team, port);
 877                 port->queue_id = new_queue_id;
 878                 __team_queue_override_port_add(team, port);
 879                 __team_queue_override_enabled_check(team);
 880         } else {
 881                 port->queue_id = new_queue_id;
 882         }
 883 }
 884
 885 static void team_queue_override_port_add(struct team *team,
 886                                          struct team_port *port)
 887 {
 888         __team_queue_override_port_add(team, port);
 889         __team_queue_override_enabled_check(team);
 890 }
 891
 892 static void team_queue_override_port_del(struct team *team,
 893                                          struct team_port *port)
 894 {
 895         __team_queue_override_port_del(team, port);
 896         __team_queue_override_enabled_check(team);
 897 }
 898
 899
 900 /****************
 901  * Port handling
 902  ****************/
 903
 904 static bool team_port_find(const struct team *team,
 905                            const struct team_port *port)
 906 {
 907         struct team_port *cur;
 908
 909         list_for_each_entry(cur, &team->port_list, list)
 910                 if (cur == port)
 911                         return true;
 912         return false;
 913 }
 914
 915 /*
 916  * Enable/disable port by adding to enabled port hashlist and setting
 917  * port->index (Might be racy so reader could see incorrect ifindex when
 918  * processing a flying packet, but that is not a problem). Write guarded
 919  * by team->lock.
 920  */
 921 static void team_port_enable(struct team *team,
 922                              struct team_port *port)
 923 {
 924         if (team_port_enabled(port))
 925                 return;
 926         port->index = team->en_port_count++;
 927         hlist_add_head_rcu(&port->hlist,
 928                            team_port_index_hash(team, port->index));
 929         team_adjust_ops(team);
 930         team_queue_override_port_add(team, port);
 931         if (team->ops.port_enabled)
 932                 team->ops.port_enabled(team, port);
 933         team_notify_peers(team);
 934         team_mcast_rejoin(team);
 935 }
 936
 937 static void __reconstruct_port_hlist(struct team *team, int rm_index)
 938 {
 939         int i;
 940         struct team_port *port;
 941
 942         for (i = rm_index + 1; i < team->en_port_count; i++) {
 943                 port = team_get_port_by_index(team, i);
 944                 hlist_del_rcu(&port->hlist);
 945                 port->index--;
 946                 hlist_add_head_rcu(&port->hlist,
 947                                    team_port_index_hash(team, port->index));
 948         }
 949 }
 950
 951 static void team_port_disable(struct team *team,
 952                               struct team_port *port)
 953 {
 954         if (!team_port_enabled(port))
 955                 return;
 956         if (team->ops.port_disabled)
 957                 team->ops.port_disabled(team, port);
 958         hlist_del_rcu(&port->hlist);
 959         __reconstruct_port_hlist(team, port->index);
 960         port->index = -1;
 961         team->en_port_count--;
 962         team_queue_override_port_del(team, port);
 963         team_adjust_ops(team);
 964         team_notify_peers(team);
 965         team_mcast_rejoin(team);
 966 }
 967
 968 #define TEAM_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
 969                             NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
 970                             NETIF_F_HIGHDMA | NETIF_F_LRO)
 971
 972 static void __team_compute_features(struct team *team)
 973 {
 974         struct team_port *port;
 975         u32 vlan_features = TEAM_VLAN_FEATURES & NETIF_F_ALL_FOR_ALL;
 976         unsigned short max_hard_header_len = ETH_HLEN;
 977         unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
 978                                         IFF_XMIT_DST_RELEASE_PERM;
 979
 980         list_for_each_entry(port, &team->port_list, list) {
 981                 vlan_features = netdev_increment_features(vlan_features,
 982                                         port->dev->vlan_features,
 983                                         TEAM_VLAN_FEATURES);
 984
 985                 dst_release_flag &= port->dev->priv_flags;
 986                 if (port->dev->hard_header_len > max_hard_header_len)
 987                         max_hard_header_len = port->dev->hard_header_len;
 988         }
 989
 990         team->dev->vlan_features = vlan_features;
 991         team->dev->hard_header_len = max_hard_header_len;
 992
 993         team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
 994         if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
 995                 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
 996
 997         netdev_change_features(team->dev);
 998 }
 999
1000 static void team_compute_features(struct team *team)
1001 {
1002         mutex_lock(&team->lock);
1003         __team_compute_features(team);
1004         mutex_unlock(&team->lock);
1005 }
1006
1007 static int team_port_enter(struct team *team, struct team_port *port)
1008 {
1009         int err = 0;
1010
1011         dev_hold(team->dev);
1012         if (team->ops.port_enter) {
1013                 err = team->ops.port_enter(team, port);
1014                 if (err) {
1015                         netdev_err(team->dev, "Device %s failed to enter team mode\n",
1016                                    port->dev->name);
1017                         goto err_port_enter;
1018                 }
1019         }
1020
1021         return 0;
1022
1023 err_port_enter:
1024         dev_put(team->dev);
1025
1026         return err;
1027 }
1028
1029 static void team_port_leave(struct team *team, struct team_port *port)
1030 {
1031         if (team->ops.port_leave)
1032                 team->ops.port_leave(team, port);
1033         dev_put(team->dev);
1034 }
1035
1036 #ifdef CONFIG_NET_POLL_CONTROLLER
1037 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1038 {
1039         struct netpoll *np;
1040         int err;
1041
1042         if (!team->dev->npinfo)
1043                 return 0;
1044
1045         np = kzalloc(sizeof(*np), GFP_KERNEL);
1046         if (!np)
1047                 return -ENOMEM;
1048
1049         err = __netpoll_setup(np, port->dev);
1050         if (err) {
1051                 kfree(np);
1052                 return err;
1053         }
1054         port->np = np;
1055         return err;
1056 }
1057
1058 static void team_port_disable_netpoll(struct team_port *port)
1059 {
1060         struct netpoll *np = port->np;
1061
1062         if (!np)
1063                 return;
1064         port->np = NULL;
1065
1066         /* Wait for transmitting packets to finish before freeing. */
1067         synchronize_rcu_bh();
1068         __netpoll_cleanup(np);
1069         kfree(np);
1070 }
1071 #else
1072 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1073 {
1074         return 0;
1075 }
1076 static void team_port_disable_netpoll(struct team_port *port)
1077 {
1078 }
1079 #endif
1080
1081 static int team_upper_dev_link(struct team *team, struct team_port *port)
1082 {
1083         struct netdev_lag_upper_info lag_upper_info;
1084         int err;
1085
1086         lag_upper_info.tx_type = team->mode->lag_tx_type;
1087         err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1088                                            &lag_upper_info);
1089         if (err)
1090                 return err;
1091         port->dev->priv_flags |= IFF_TEAM_PORT;
1092         return 0;
1093 }
1094
1095 static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1096 {
1097         netdev_upper_dev_unlink(port->dev, team->dev);
1098         port->dev->priv_flags &= ~IFF_TEAM_PORT;
1099 }
1100
1101 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1102 static int team_dev_type_check_change(struct net_device *dev,
1103                                       struct net_device *port_dev);
1104
1105 static int team_port_add(struct team *team, struct net_device *port_dev)
1106 {
1107         struct net_device *dev = team->dev;
1108         struct team_port *port;
1109         char *portname = port_dev->name;
1110         int err;
1111
1112         if (port_dev->flags & IFF_LOOPBACK) {
1113                 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1114                            portname);
1115                 return -EINVAL;
1116         }
1117
1118         if (team_port_exists(port_dev)) {
1119                 netdev_err(dev, "Device %s is already a port "
1120                                 "of a team device\n", portname);
1121                 return -EBUSY;
1122         }
1123
1124         if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1125             vlan_uses_dev(dev)) {
1126                 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1127                            portname);
1128                 return -EPERM;
1129         }
1130
1131         err = team_dev_type_check_change(dev, port_dev);
1132         if (err)
1133                 return err;
1134
1135         if (port_dev->flags & IFF_UP) {
1136                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1137                            portname);
1138                 return -EBUSY;
1139         }
1140
1141         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1142                        GFP_KERNEL);
1143         if (!port)
1144                 return -ENOMEM;
1145
1146         port->dev = port_dev;
1147         port->team = team;
1148         INIT_LIST_HEAD(&port->qom_list);
1149
1150         port->orig.mtu = port_dev->mtu;
1151         err = dev_set_mtu(port_dev, dev->mtu);
1152         if (err) {
1153                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1154                 goto err_set_mtu;
1155         }
1156
1157         memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1158
1159         err = team_port_enter(team, port);
1160         if (err) {
1161                 netdev_err(dev, "Device %s failed to enter team mode\n",
1162                            portname);
1163                 goto err_port_enter;
1164         }
1165
1166         err = dev_open(port_dev);
1167         if (err) {
1168                 netdev_dbg(dev, "Device %s opening failed\n",
1169                            portname);
1170                 goto err_dev_open;
1171         }
1172
1173         err = vlan_vids_add_by_dev(port_dev, dev);
1174         if (err) {
1175                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1176                                 portname);
1177                 goto err_vids_add;
1178         }
1179
1180         err = team_port_enable_netpoll(team, port);
1181         if (err) {
1182                 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1183                            portname);
1184                 goto err_enable_netpoll;
1185         }
1186
1187         if (!(dev->features & NETIF_F_LRO))
1188                 dev_disable_lro(port_dev);
1189
1190         err = netdev_rx_handler_register(port_dev, team_handle_frame,
1191                                          port);
1192         if (err) {
1193                 netdev_err(dev, "Device %s failed to register rx_handler\n",
1194                            portname);
1195                 goto err_handler_register;
1196         }
1197
1198         err = team_upper_dev_link(team, port);
1199         if (err) {
1200                 netdev_err(dev, "Device %s failed to set upper link\n",
1201                            portname);
1202                 goto err_set_upper_link;
1203         }
1204
1205         err = __team_option_inst_add_port(team, port);
1206         if (err) {
1207                 netdev_err(dev, "Device %s failed to add per-port options\n",
1208                            portname);
1209                 goto err_option_port_add;
1210         }
1211
1212         port->index = -1;
1213         list_add_tail_rcu(&port->list, &team->port_list);
1214         team_port_enable(team, port);
1215         __team_compute_features(team);
1216         __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1217         __team_options_change_check(team);
1218
1219         netdev_info(dev, "Port device %s added\n", portname);
1220
1221         return 0;
1222
1223 err_option_port_add:
1224         team_upper_dev_unlink(team, port);
1225
1226 err_set_upper_link:
1227         netdev_rx_handler_unregister(port_dev);
1228
1229 err_handler_register:
1230         team_port_disable_netpoll(port);
1231
1232 err_enable_netpoll:
1233         vlan_vids_del_by_dev(port_dev, dev);
1234
1235 err_vids_add:
1236         dev_close(port_dev);
1237
1238 err_dev_open:
1239         team_port_leave(team, port);
1240         team_port_set_orig_dev_addr(port);
1241
1242 err_port_enter:
1243         dev_set_mtu(port_dev, port->orig.mtu);
1244
1245 err_set_mtu:
1246         kfree(port);
1247
1248         return err;
1249 }
1250
1251 static void __team_port_change_port_removed(struct team_port *port);
1252
1253 static int team_port_del(struct team *team, struct net_device *port_dev)
1254 {
1255         struct net_device *dev = team->dev;
1256         struct team_port *port;
1257         char *portname = port_dev->name;
1258
1259         port = team_port_get_rtnl(port_dev);
1260         if (!port || !team_port_find(team, port)) {
1261                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1262                            portname);
1263                 return -ENOENT;
1264         }
1265
1266         team_port_disable(team, port);
1267         list_del_rcu(&port->list);
1268         team_upper_dev_unlink(team, port);
1269         netdev_rx_handler_unregister(port_dev);
1270         team_port_disable_netpoll(port);
1271         vlan_vids_del_by_dev(port_dev, dev);
1272         dev_uc_unsync(port_dev, dev);
1273         dev_mc_unsync(port_dev, dev);
1274         dev_close(port_dev);
1275         team_port_leave(team, port);
1276
1277         __team_option_inst_mark_removed_port(team, port);
1278         __team_options_change_check(team);
1279         __team_option_inst_del_port(team, port);
1280         __team_port_change_port_removed(port);
1281
1282         team_port_set_orig_dev_addr(port);
1283         dev_set_mtu(port_dev, port->orig.mtu);
1284         kfree_rcu(port, rcu);
1285         netdev_info(dev, "Port device %s removed\n", portname);
1286         __team_compute_features(team);
1287
1288         return 0;
1289 }
1290
1291
1292 /*****************
1293  * Net device ops
1294  *****************/
1295
1296 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1297 {
1298         ctx->data.str_val = team->mode->kind;
1299         return 0;
1300 }
1301
1302 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1303 {
1304         return team_change_mode(team, ctx->data.str_val);
1305 }
1306
1307 static int team_notify_peers_count_get(struct team *team,
1308                                        struct team_gsetter_ctx *ctx)
1309 {
1310         ctx->data.u32_val = team->notify_peers.count;
1311         return 0;
1312 }
1313
1314 static int team_notify_peers_count_set(struct team *team,
1315                                        struct team_gsetter_ctx *ctx)
1316 {
1317         team->notify_peers.count = ctx->data.u32_val;
1318         return 0;
1319 }
1320
1321 static int team_notify_peers_interval_get(struct team *team,
1322                                           struct team_gsetter_ctx *ctx)
1323 {
1324         ctx->data.u32_val = team->notify_peers.interval;
1325         return 0;
1326 }
1327
1328 static int team_notify_peers_interval_set(struct team *team,
1329                                           struct team_gsetter_ctx *ctx)
1330 {
1331         team->notify_peers.interval = ctx->data.u32_val;
1332         return 0;
1333 }
1334
1335 static int team_mcast_rejoin_count_get(struct team *team,
1336                                        struct team_gsetter_ctx *ctx)
1337 {
1338         ctx->data.u32_val = team->mcast_rejoin.count;
1339         return 0;
1340 }
1341
1342 static int team_mcast_rejoin_count_set(struct team *team,
1343                                        struct team_gsetter_ctx *ctx)
1344 {
1345         team->mcast_rejoin.count = ctx->data.u32_val;
1346         return 0;
1347 }
1348
1349 static int team_mcast_rejoin_interval_get(struct team *team,
1350                                           struct team_gsetter_ctx *ctx)
1351 {
1352         ctx->data.u32_val = team->mcast_rejoin.interval;
1353         return 0;
1354 }
1355
1356 static int team_mcast_rejoin_interval_set(struct team *team,
1357                                           struct team_gsetter_ctx *ctx)
1358 {
1359         team->mcast_rejoin.interval = ctx->data.u32_val;
1360         return 0;
1361 }
1362
1363 static int team_port_en_option_get(struct team *team,
1364                                    struct team_gsetter_ctx *ctx)
1365 {
1366         struct team_port *port = ctx->info->port;
1367
1368         ctx->data.bool_val = team_port_enabled(port);
1369         return 0;
1370 }
1371
1372 static int team_port_en_option_set(struct team *team,
1373                                    struct team_gsetter_ctx *ctx)
1374 {
1375         struct team_port *port = ctx->info->port;
1376
1377         if (ctx->data.bool_val)
1378                 team_port_enable(team, port);
1379         else
1380                 team_port_disable(team, port);
1381         return 0;
1382 }
1383
1384 static int team_user_linkup_option_get(struct team *team,
1385                                        struct team_gsetter_ctx *ctx)
1386 {
1387         struct team_port *port = ctx->info->port;
1388
1389         ctx->data.bool_val = port->user.linkup;
1390         return 0;
1391 }
1392
1393 static void __team_carrier_check(struct team *team);
1394
1395 static int team_user_linkup_option_set(struct team *team,
1396                                        struct team_gsetter_ctx *ctx)
1397 {
1398         struct team_port *port = ctx->info->port;
1399
1400         port->user.linkup = ctx->data.bool_val;
1401         team_refresh_port_linkup(port);
1402         __team_carrier_check(port->team);
1403         return 0;
1404 }
1405
1406 static int team_user_linkup_en_option_get(struct team *team,
1407                                           struct team_gsetter_ctx *ctx)
1408 {
1409         struct team_port *port = ctx->info->port;
1410
1411         ctx->data.bool_val = port->user.linkup_enabled;
1412         return 0;
1413 }
1414
1415 static int team_user_linkup_en_option_set(struct team *team,
1416                                           struct team_gsetter_ctx *ctx)
1417 {
1418         struct team_port *port = ctx->info->port;
1419
1420         port->user.linkup_enabled = ctx->data.bool_val;
1421         team_refresh_port_linkup(port);
1422         __team_carrier_check(port->team);
1423         return 0;
1424 }
1425
1426 static int team_priority_option_get(struct team *team,
1427                                     struct team_gsetter_ctx *ctx)
1428 {
1429         struct team_port *port = ctx->info->port;
1430
1431         ctx->data.s32_val = port->priority;
1432         return 0;
1433 }
1434
1435 static int team_priority_option_set(struct team *team,
1436                                     struct team_gsetter_ctx *ctx)
1437 {
1438         struct team_port *port = ctx->info->port;
1439         s32 priority = ctx->data.s32_val;
1440
1441         if (port->priority == priority)
1442                 return 0;
1443         port->priority = priority;
1444         team_queue_override_port_prio_changed(team, port);
1445         return 0;
1446 }
1447
1448 static int team_queue_id_option_get(struct team *team,
1449                                     struct team_gsetter_ctx *ctx)
1450 {
1451         struct team_port *port = ctx->info->port;
1452
1453         ctx->data.u32_val = port->queue_id;
1454         return 0;
1455 }
1456
1457 static int team_queue_id_option_set(struct team *team,
1458                                     struct team_gsetter_ctx *ctx)
1459 {
1460         struct team_port *port = ctx->info->port;
1461         u16 new_queue_id = ctx->data.u32_val;
1462
1463         if (port->queue_id == new_queue_id)
1464                 return 0;
1465         if (new_queue_id >= team->dev->real_num_tx_queues)
1466                 return -EINVAL;
1467         team_queue_override_port_change_queue_id(team, port, new_queue_id);
1468         return 0;
1469 }
1470
1471 static const struct team_option team_options[] = {
1472         {
1473                 .name = "mode",
1474                 .type = TEAM_OPTION_TYPE_STRING,
1475                 .getter = team_mode_option_get,
1476                 .setter = team_mode_option_set,
1477         },
1478         {
1479                 .name = "notify_peers_count",
1480                 .type = TEAM_OPTION_TYPE_U32,
1481                 .getter = team_notify_peers_count_get,
1482                 .setter = team_notify_peers_count_set,
1483         },
1484         {
1485                 .name = "notify_peers_interval",
1486                 .type = TEAM_OPTION_TYPE_U32,
1487                 .getter = team_notify_peers_interval_get,
1488                 .setter = team_notify_peers_interval_set,
1489         },
1490         {
1491                 .name = "mcast_rejoin_count",
1492                 .type = TEAM_OPTION_TYPE_U32,
1493                 .getter = team_mcast_rejoin_count_get,
1494                 .setter = team_mcast_rejoin_count_set,
1495         },
1496         {
1497                 .name = "mcast_rejoin_interval",
1498                 .type = TEAM_OPTION_TYPE_U32,
1499                 .getter = team_mcast_rejoin_interval_get,
1500                 .setter = team_mcast_rejoin_interval_set,
1501         },
1502         {
1503                 .name = "enabled",
1504                 .type = TEAM_OPTION_TYPE_BOOL,
1505                 .per_port = true,
1506                 .getter = team_port_en_option_get,
1507                 .setter = team_port_en_option_set,
1508         },
1509         {
1510                 .name = "user_linkup",
1511                 .type = TEAM_OPTION_TYPE_BOOL,
1512                 .per_port = true,
1513                 .getter = team_user_linkup_option_get,
1514                 .setter = team_user_linkup_option_set,
1515         },
1516         {
1517                 .name = "user_linkup_enabled",
1518                 .type = TEAM_OPTION_TYPE_BOOL,
1519                 .per_port = true,
1520                 .getter = team_user_linkup_en_option_get,
1521                 .setter = team_user_linkup_en_option_set,
1522         },
1523         {
1524                 .name = "priority",
1525                 .type = TEAM_OPTION_TYPE_S32,
1526                 .per_port = true,
1527                 .getter = team_priority_option_get,
1528                 .setter = team_priority_option_set,
1529         },
1530         {
1531                 .name = "queue_id",
1532                 .type = TEAM_OPTION_TYPE_U32,
1533                 .per_port = true,
1534                 .getter = team_queue_id_option_get,
1535                 .setter = team_queue_id_option_set,
1536         },
1537 };
1538
1539 static struct lock_class_key team_netdev_xmit_lock_key;
1540 static struct lock_class_key team_netdev_addr_lock_key;
1541 static struct lock_class_key team_tx_busylock_key;
1542
1543 static void team_set_lockdep_class_one(struct net_device *dev,
1544                                        struct netdev_queue *txq,
1545                                        void *unused)
1546 {
1547         lockdep_set_class(&txq->_xmit_lock, &team_netdev_xmit_lock_key);
1548 }
1549
1550 static void team_set_lockdep_class(struct net_device *dev)
1551 {
1552         lockdep_set_class(&dev->addr_list_lock, &team_netdev_addr_lock_key);
1553         netdev_for_each_tx_queue(dev, team_set_lockdep_class_one, NULL);
1554         dev->qdisc_tx_busylock = &team_tx_busylock_key;
1555 }
1556
1557 static int team_init(struct net_device *dev)
1558 {
1559         struct team *team = netdev_priv(dev);
1560         int i;
1561         int err;
1562
1563         team->dev = dev;
1564         mutex_init(&team->lock);
1565         team_set_no_mode(team);
1566
1567         team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1568         if (!team->pcpu_stats)
1569                 return -ENOMEM;
1570
1571         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1572                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1573         INIT_LIST_HEAD(&team->port_list);
1574         err = team_queue_override_init(team);
1575         if (err)
1576                 goto err_team_queue_override_init;
1577
1578         team_adjust_ops(team);
1579
1580         INIT_LIST_HEAD(&team->option_list);
1581         INIT_LIST_HEAD(&team->option_inst_list);
1582
1583         team_notify_peers_init(team);
1584         team_mcast_rejoin_init(team);
1585
1586         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1587         if (err)
1588                 goto err_options_register;
1589         netif_carrier_off(dev);
1590
1591         team_set_lockdep_class(dev);
1592
1593         return 0;
1594
1595 err_options_register:
1596         team_mcast_rejoin_fini(team);
1597         team_notify_peers_fini(team);
1598         team_queue_override_fini(team);
1599 err_team_queue_override_init:
1600         free_percpu(team->pcpu_stats);
1601
1602         return err;
1603 }
1604
1605 static void team_uninit(struct net_device *dev)
1606 {
1607         struct team *team = netdev_priv(dev);
1608         struct team_port *port;
1609         struct team_port *tmp;
1610
1611         mutex_lock(&team->lock);
1612         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1613                 team_port_del(team, port->dev);
1614
1615         __team_change_mode(team, NULL); /* cleanup */
1616         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1617         team_mcast_rejoin_fini(team);
1618         team_notify_peers_fini(team);
1619         team_queue_override_fini(team);
1620         mutex_unlock(&team->lock);
1621 }
1622
1623 static void team_destructor(struct net_device *dev)
1624 {
1625         struct team *team = netdev_priv(dev);
1626
1627         free_percpu(team->pcpu_stats);
1628         free_netdev(dev);
1629 }
1630
1631 static int team_open(struct net_device *dev)
1632 {
1633         return 0;
1634 }
1635
1636 static int team_close(struct net_device *dev)
1637 {
1638         return 0;
1639 }
1640
1641 /*
1642  * note: already called with rcu_read_lock
1643  */
1644 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1645 {
1646         struct team *team = netdev_priv(dev);
1647         bool tx_success;
1648         unsigned int len = skb->len;
1649
1650         tx_success = team_queue_override_transmit(team, skb);
1651         if (!tx_success)
1652                 tx_success = team->ops.transmit(team, skb);
1653         if (tx_success) {
1654                 struct team_pcpu_stats *pcpu_stats;
1655
1656                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1657                 u64_stats_update_begin(&pcpu_stats->syncp);
1658                 pcpu_stats->tx_packets++;
1659                 pcpu_stats->tx_bytes += len;
1660                 u64_stats_update_end(&pcpu_stats->syncp);
1661         } else {
1662                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1663         }
1664
1665         return NETDEV_TX_OK;
1666 }
1667
1668 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1669                              void *accel_priv, select_queue_fallback_t fallback)
1670 {
1671         /*
1672          * This helper function exists to help dev_pick_tx get the correct
1673          * destination queue.  Using a helper function skips a call to
1674          * skb_tx_hash and will put the skbs in the queue we expect on their
1675          * way down to the team driver.
1676          */
1677         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1678
1679         /*
1680          * Save the original txq to restore before passing to the driver
1681          */
1682         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1683
1684         if (unlikely(txq >= dev->real_num_tx_queues)) {
1685                 do {
1686                         txq -= dev->real_num_tx_queues;
1687                 } while (txq >= dev->real_num_tx_queues);
1688         }
1689         return txq;
1690 }
1691
1692 static void team_change_rx_flags(struct net_device *dev, int change)
1693 {
1694         struct team *team = netdev_priv(dev);
1695         struct team_port *port;
1696         int inc;
1697
1698         rcu_read_lock();
1699         list_for_each_entry_rcu(port, &team->port_list, list) {
1700                 if (change & IFF_PROMISC) {
1701                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1702                         dev_set_promiscuity(port->dev, inc);
1703                 }
1704                 if (change & IFF_ALLMULTI) {
1705                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1706                         dev_set_allmulti(port->dev, inc);
1707                 }
1708         }
1709         rcu_read_unlock();
1710 }
1711
1712 static void team_set_rx_mode(struct net_device *dev)
1713 {
1714         struct team *team = netdev_priv(dev);
1715         struct team_port *port;
1716
1717         rcu_read_lock();
1718         list_for_each_entry_rcu(port, &team->port_list, list) {
1719                 dev_uc_sync_multiple(port->dev, dev);
1720                 dev_mc_sync_multiple(port->dev, dev);
1721         }
1722         rcu_read_unlock();
1723 }
1724
1725 static int team_set_mac_address(struct net_device *dev, void *p)
1726 {
1727         struct sockaddr *addr = p;
1728         struct team *team = netdev_priv(dev);
1729         struct team_port *port;
1730
1731         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1732                 return -EADDRNOTAVAIL;
1733         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1734         mutex_lock(&team->lock);
1735         list_for_each_entry(port, &team->port_list, list)
1736                 if (team->ops.port_change_dev_addr)
1737                         team->ops.port_change_dev_addr(team, port);
1738         mutex_unlock(&team->lock);
1739         return 0;
1740 }
1741
1742 static int team_change_mtu(struct net_device *dev, int new_mtu)
1743 {
1744         struct team *team = netdev_priv(dev);
1745         struct team_port *port;
1746         int err;
1747
1748         /*
1749          * Alhough this is reader, it's guarded by team lock. It's not possible
1750          * to traverse list in reverse under rcu_read_lock
1751          */
1752         mutex_lock(&team->lock);
1753         team->port_mtu_change_allowed = true;
1754         list_for_each_entry(port, &team->port_list, list) {
1755                 err = dev_set_mtu(port->dev, new_mtu);
1756                 if (err) {
1757                         netdev_err(dev, "Device %s failed to change mtu",
1758                                    port->dev->name);
1759                         goto unwind;
1760                 }
1761         }
1762         team->port_mtu_change_allowed = false;
1763         mutex_unlock(&team->lock);
1764
1765         dev->mtu = new_mtu;
1766
1767         return 0;
1768
1769 unwind:
1770         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1771                 dev_set_mtu(port->dev, dev->mtu);
1772         team->port_mtu_change_allowed = false;
1773         mutex_unlock(&team->lock);
1774
1775         return err;
1776 }
1777
1778 static struct rtnl_link_stats64 *
1779 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1780 {
1781         struct team *team = netdev_priv(dev);
1782         struct team_pcpu_stats *p;
1783         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1784         u32 rx_dropped = 0, tx_dropped = 0;
1785         unsigned int start;
1786         int i;
1787
1788         for_each_possible_cpu(i) {
1789                 p = per_cpu_ptr(team->pcpu_stats, i);
1790                 do {
1791                         start = u64_stats_fetch_begin_irq(&p->syncp);
1792                         rx_packets      = p->rx_packets;
1793                         rx_bytes        = p->rx_bytes;
1794                         rx_multicast    = p->rx_multicast;
1795                         tx_packets      = p->tx_packets;
1796                         tx_bytes        = p->tx_bytes;
1797                 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1798
1799                 stats->rx_packets       += rx_packets;
1800                 stats->rx_bytes         += rx_bytes;
1801                 stats->multicast        += rx_multicast;
1802                 stats->tx_packets       += tx_packets;
1803                 stats->tx_bytes         += tx_bytes;
1804                 /*
1805                  * rx_dropped & tx_dropped are u32, updated
1806                  * without syncp protection.
1807                  */
1808                 rx_dropped      += p->rx_dropped;
1809                 tx_dropped      += p->tx_dropped;
1810         }
1811         stats->rx_dropped       = rx_dropped;
1812         stats->tx_dropped       = tx_dropped;
1813         return stats;
1814 }
1815
1816 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1817 {
1818         struct team *team = netdev_priv(dev);
1819         struct team_port *port;
1820         int err;
1821
1822         /*
1823          * Alhough this is reader, it's guarded by team lock. It's not possible
1824          * to traverse list in reverse under rcu_read_lock
1825          */
1826         mutex_lock(&team->lock);
1827         list_for_each_entry(port, &team->port_list, list) {
1828                 err = vlan_vid_add(port->dev, proto, vid);
1829                 if (err)
1830                         goto unwind;
1831         }
1832         mutex_unlock(&team->lock);
1833
1834         return 0;
1835
1836 unwind:
1837         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1838                 vlan_vid_del(port->dev, proto, vid);
1839         mutex_unlock(&team->lock);
1840
1841         return err;
1842 }
1843
1844 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1845 {
1846         struct team *team = netdev_priv(dev);
1847         struct team_port *port;
1848
1849         rcu_read_lock();
1850         list_for_each_entry_rcu(port, &team->port_list, list)
1851                 vlan_vid_del(port->dev, proto, vid);
1852         rcu_read_unlock();
1853
1854         return 0;
1855 }
1856
1857 #ifdef CONFIG_NET_POLL_CONTROLLER
1858 static void team_poll_controller(struct net_device *dev)
1859 {
1860 }
1861
1862 static void __team_netpoll_cleanup(struct team *team)
1863 {
1864         struct team_port *port;
1865
1866         list_for_each_entry(port, &team->port_list, list)
1867                 team_port_disable_netpoll(port);
1868 }
1869
1870 static void team_netpoll_cleanup(struct net_device *dev)
1871 {
1872         struct team *team = netdev_priv(dev);
1873
1874         mutex_lock(&team->lock);
1875         __team_netpoll_cleanup(team);
1876         mutex_unlock(&team->lock);
1877 }
1878
1879 static int team_netpoll_setup(struct net_device *dev,
1880                               struct netpoll_info *npifo)
1881 {
1882         struct team *team = netdev_priv(dev);
1883         struct team_port *port;
1884         int err = 0;
1885
1886         mutex_lock(&team->lock);
1887         list_for_each_entry(port, &team->port_list, list) {
1888                 err = team_port_enable_netpoll(team, port);
1889                 if (err) {
1890                         __team_netpoll_cleanup(team);
1891                         break;
1892                 }
1893         }
1894         mutex_unlock(&team->lock);
1895         return err;
1896 }
1897 #endif
1898
1899 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1900 {
1901         struct team *team = netdev_priv(dev);
1902         int err;
1903
1904         mutex_lock(&team->lock);
1905         err = team_port_add(team, port_dev);
1906         mutex_unlock(&team->lock);
1907         return err;
1908 }
1909
1910 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1911 {
1912         struct team *team = netdev_priv(dev);
1913         int err;
1914
1915         mutex_lock(&team->lock);
1916         err = team_port_del(team, port_dev);
1917         mutex_unlock(&team->lock);
1918         return err;
1919 }
1920
1921 static netdev_features_t team_fix_features(struct net_device *dev,
1922                                            netdev_features_t features)
1923 {
1924         struct team_port *port;
1925         struct team *team = netdev_priv(dev);
1926         netdev_features_t mask;
1927
1928         mask = features;
1929         features &= ~NETIF_F_ONE_FOR_ALL;
1930         features |= NETIF_F_ALL_FOR_ALL;
1931
1932         rcu_read_lock();
1933         list_for_each_entry_rcu(port, &team->port_list, list) {
1934                 features = netdev_increment_features(features,
1935                                                      port->dev->features,
1936                                                      mask);
1937         }
1938         rcu_read_unlock();
1939
1940         features = netdev_add_tso_features(features, mask);
1941
1942         return features;
1943 }
1944
1945 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1946 {
1947         struct team *team = netdev_priv(dev);
1948
1949         team->user_carrier_enabled = true;
1950
1951         if (new_carrier)
1952                 netif_carrier_on(dev);
1953         else
1954                 netif_carrier_off(dev);
1955         return 0;
1956 }
1957
1958 static const struct net_device_ops team_netdev_ops = {
1959         .ndo_init               = team_init,
1960         .ndo_uninit             = team_uninit,
1961         .ndo_open               = team_open,
1962         .ndo_stop               = team_close,
1963         .ndo_start_xmit         = team_xmit,
1964         .ndo_select_queue       = team_select_queue,
1965         .ndo_change_rx_flags    = team_change_rx_flags,
1966         .ndo_set_rx_mode        = team_set_rx_mode,
1967         .ndo_set_mac_address    = team_set_mac_address,
1968         .ndo_change_mtu         = team_change_mtu,
1969         .ndo_get_stats64        = team_get_stats64,
1970         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
1971         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
1972 #ifdef CONFIG_NET_POLL_CONTROLLER
1973         .ndo_poll_controller    = team_poll_controller,
1974         .ndo_netpoll_setup      = team_netpoll_setup,
1975         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
1976 #endif
1977         .ndo_add_slave          = team_add_slave,
1978         .ndo_del_slave          = team_del_slave,
1979         .ndo_fix_features       = team_fix_features,
1980         .ndo_change_carrier     = team_change_carrier,
1981         .ndo_bridge_setlink     = switchdev_port_bridge_setlink,
1982         .ndo_bridge_getlink     = switchdev_port_bridge_getlink,
1983         .ndo_bridge_dellink     = switchdev_port_bridge_dellink,
1984         .ndo_fdb_add            = switchdev_port_fdb_add,
1985         .ndo_fdb_del            = switchdev_port_fdb_del,
1986         .ndo_fdb_dump           = switchdev_port_fdb_dump,
1987         .ndo_features_check     = passthru_features_check,
1988 };
1989
1990 /***********************
1991  * ethtool interface
1992  ***********************/
1993
1994 static void team_ethtool_get_drvinfo(struct net_device *dev,
1995                                      struct ethtool_drvinfo *drvinfo)
1996 {
1997         strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
1998         strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
1999 }
2000
2001 static const struct ethtool_ops team_ethtool_ops = {
2002         .get_drvinfo            = team_ethtool_get_drvinfo,
2003         .get_link               = ethtool_op_get_link,
2004 };
2005
2006 /***********************
2007  * rt netlink interface
2008  ***********************/
2009
2010 static void team_setup_by_port(struct net_device *dev,
2011                                struct net_device *port_dev)
2012 {
2013         dev->header_ops = port_dev->header_ops;
2014         dev->type = port_dev->type;
2015         dev->hard_header_len = port_dev->hard_header_len;
2016         dev->addr_len = port_dev->addr_len;
2017         dev->mtu = port_dev->mtu;
2018         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2019         eth_hw_addr_inherit(dev, port_dev);
2020 }
2021
2022 static int team_dev_type_check_change(struct net_device *dev,
2023                                       struct net_device *port_dev)
2024 {
2025         struct team *team = netdev_priv(dev);
2026         char *portname = port_dev->name;
2027         int err;
2028
2029         if (dev->type == port_dev->type)
2030                 return 0;
2031         if (!list_empty(&team->port_list)) {
2032                 netdev_err(dev, "Device %s is of different type\n", portname);
2033                 return -EBUSY;
2034         }
2035         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2036         err = notifier_to_errno(err);
2037         if (err) {
2038                 netdev_err(dev, "Refused to change device type\n");
2039                 return err;
2040         }
2041         dev_uc_flush(dev);
2042         dev_mc_flush(dev);
2043         team_setup_by_port(dev, port_dev);
2044         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2045         return 0;
2046 }
2047
2048 static void team_setup(struct net_device *dev)
2049 {
2050         ether_setup(dev);
2051
2052         dev->netdev_ops = &team_netdev_ops;
2053         dev->ethtool_ops = &team_ethtool_ops;
2054         dev->destructor = team_destructor;
2055         dev->flags |= IFF_MULTICAST;
2056         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2057         dev->priv_flags |= IFF_NO_QUEUE;
2058         dev->priv_flags |= IFF_TEAM;
2059
2060         /*
2061          * Indicate we support unicast address filtering. That way core won't
2062          * bring us to promisc mode in case a unicast addr is added.
2063          * Let this up to underlay drivers.
2064          */
2065         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2066
2067         dev->features |= NETIF_F_LLTX;
2068         dev->features |= NETIF_F_GRO;
2069
2070         /* Don't allow team devices to change network namespaces. */
2071         dev->features |= NETIF_F_NETNS_LOCAL;
2072
2073         dev->hw_features = TEAM_VLAN_FEATURES |
2074                            NETIF_F_HW_VLAN_CTAG_TX |
2075                            NETIF_F_HW_VLAN_CTAG_RX |
2076                            NETIF_F_HW_VLAN_CTAG_FILTER;
2077
2078         dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_HW_CSUM);
2079         dev->features |= dev->hw_features;
2080 }
2081
2082 static int team_newlink(struct net *src_net, struct net_device *dev,
2083                         struct nlattr *tb[], struct nlattr *data[])
2084 {
2085         if (tb[IFLA_ADDRESS] == NULL)
2086                 eth_hw_addr_random(dev);
2087
2088         return register_netdevice(dev);
2089 }
2090
2091 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
2092 {
2093         if (tb[IFLA_ADDRESS]) {
2094                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2095                         return -EINVAL;
2096                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2097                         return -EADDRNOTAVAIL;
2098         }
2099         return 0;
2100 }
2101
2102 static unsigned int team_get_num_tx_queues(void)
2103 {
2104         return TEAM_DEFAULT_NUM_TX_QUEUES;
2105 }
2106
2107 static unsigned int team_get_num_rx_queues(void)
2108 {
2109         return TEAM_DEFAULT_NUM_RX_QUEUES;
2110 }
2111
2112 static struct rtnl_link_ops team_link_ops __read_mostly = {
2113         .kind                   = DRV_NAME,
2114         .priv_size              = sizeof(struct team),
2115         .setup                  = team_setup,
2116         .newlink                = team_newlink,
2117         .validate               = team_validate,
2118         .get_num_tx_queues      = team_get_num_tx_queues,
2119         .get_num_rx_queues      = team_get_num_rx_queues,
2120 };
2121
2122
2123 /***********************************
2124  * Generic netlink custom interface
2125  ***********************************/
2126
2127 static struct genl_family team_nl_family = {
2128         .id             = GENL_ID_GENERATE,
2129         .name           = TEAM_GENL_NAME,
2130         .version        = TEAM_GENL_VERSION,
2131         .maxattr        = TEAM_ATTR_MAX,
2132         .netnsok        = true,
2133 };
2134
2135 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2136         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
2137         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
2138         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
2139         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
2140 };
2141
2142 static const struct nla_policy
2143 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2144         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
2145         [TEAM_ATTR_OPTION_NAME] = {
2146                 .type = NLA_STRING,
2147                 .len = TEAM_STRING_MAX_LEN,
2148         },
2149         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
2150         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
2151         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
2152 };
2153
2154 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2155 {
2156         struct sk_buff *msg;
2157         void *hdr;
2158         int err;
2159
2160         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2161         if (!msg)
2162                 return -ENOMEM;
2163
2164         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2165                           &team_nl_family, 0, TEAM_CMD_NOOP);
2166         if (!hdr) {
2167                 err = -EMSGSIZE;
2168                 goto err_msg_put;
2169         }
2170
2171         genlmsg_end(msg, hdr);
2172
2173         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2174
2175 err_msg_put:
2176         nlmsg_free(msg);
2177
2178         return err;
2179 }
2180
2181 /*
2182  * Netlink cmd functions should be locked by following two functions.
2183  * Since dev gets held here, that ensures dev won't disappear in between.
2184  */
2185 static struct team *team_nl_team_get(struct genl_info *info)
2186 {
2187         struct net *net = genl_info_net(info);
2188         int ifindex;
2189         struct net_device *dev;
2190         struct team *team;
2191
2192         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2193                 return NULL;
2194
2195         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2196         dev = dev_get_by_index(net, ifindex);
2197         if (!dev || dev->netdev_ops != &team_netdev_ops) {
2198                 if (dev)
2199                         dev_put(dev);
2200                 return NULL;
2201         }
2202
2203         team = netdev_priv(dev);
2204         mutex_lock(&team->lock);
2205         return team;
2206 }
2207
2208 static void team_nl_team_put(struct team *team)
2209 {
2210         mutex_unlock(&team->lock);
2211         dev_put(team->dev);
2212 }
2213
2214 typedef int team_nl_send_func_t(struct sk_buff *skb,
2215                                 struct team *team, u32 portid);
2216
2217 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2218 {
2219         return genlmsg_unicast(dev_net(team->dev), skb, portid);
2220 }
2221
2222 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2223                                        struct team_option_inst *opt_inst)
2224 {
2225         struct nlattr *option_item;
2226         struct team_option *option = opt_inst->option;
2227         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2228         struct team_gsetter_ctx ctx;
2229         int err;
2230
2231         ctx.info = opt_inst_info;
2232         err = team_option_get(team, opt_inst, &ctx);
2233         if (err)
2234                 return err;
2235
2236         option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2237         if (!option_item)
2238                 return -EMSGSIZE;
2239
2240         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2241                 goto nest_cancel;
2242         if (opt_inst_info->port &&
2243             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2244                         opt_inst_info->port->dev->ifindex))
2245                 goto nest_cancel;
2246         if (opt_inst->option->array_size &&
2247             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2248                         opt_inst_info->array_index))
2249                 goto nest_cancel;
2250
2251         switch (option->type) {
2252         case TEAM_OPTION_TYPE_U32:
2253                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2254                         goto nest_cancel;
2255                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2256                         goto nest_cancel;
2257                 break;
2258         case TEAM_OPTION_TYPE_STRING:
2259                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2260                         goto nest_cancel;
2261                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2262                                    ctx.data.str_val))
2263                         goto nest_cancel;
2264                 break;
2265         case TEAM_OPTION_TYPE_BINARY:
2266                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2267                         goto nest_cancel;
2268                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2269                             ctx.data.bin_val.ptr))
2270                         goto nest_cancel;
2271                 break;
2272         case TEAM_OPTION_TYPE_BOOL:
2273                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2274                         goto nest_cancel;
2275                 if (ctx.data.bool_val &&
2276                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2277                         goto nest_cancel;
2278                 break;
2279         case TEAM_OPTION_TYPE_S32:
2280                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2281                         goto nest_cancel;
2282                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2283                         goto nest_cancel;
2284                 break;
2285         default:
2286                 BUG();
2287         }
2288         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2289                 goto nest_cancel;
2290         if (opt_inst->changed) {
2291                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2292                         goto nest_cancel;
2293                 opt_inst->changed = false;
2294         }
2295         nla_nest_end(skb, option_item);
2296         return 0;
2297
2298 nest_cancel:
2299         nla_nest_cancel(skb, option_item);
2300         return -EMSGSIZE;
2301 }
2302
2303 static int __send_and_alloc_skb(struct sk_buff **pskb,
2304                                 struct team *team, u32 portid,
2305                                 team_nl_send_func_t *send_func)
2306 {
2307         int err;
2308
2309         if (*pskb) {
2310                 err = send_func(*pskb, team, portid);
2311                 if (err)
2312                         return err;
2313         }
2314         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2315         if (!*pskb)
2316                 return -ENOMEM;
2317         return 0;
2318 }
2319
2320 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2321                                     int flags, team_nl_send_func_t *send_func,
2322                                     struct list_head *sel_opt_inst_list)
2323 {
2324         struct nlattr *option_list;
2325         struct nlmsghdr *nlh;
2326         void *hdr;
2327         struct team_option_inst *opt_inst;
2328         int err;
2329         struct sk_buff *skb = NULL;
2330         bool incomplete;
2331         int i;
2332
2333         opt_inst = list_first_entry(sel_opt_inst_list,
2334                                     struct team_option_inst, tmp_list);
2335
2336 start_again:
2337         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2338         if (err)
2339                 return err;
2340
2341         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2342                           TEAM_CMD_OPTIONS_GET);
2343         if (!hdr)
2344                 return -EMSGSIZE;
2345
2346         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2347                 goto nla_put_failure;
2348         option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2349         if (!option_list)
2350                 goto nla_put_failure;
2351
2352         i = 0;
2353         incomplete = false;
2354         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2355                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2356                 if (err) {
2357                         if (err == -EMSGSIZE) {
2358                                 if (!i)
2359                                         goto errout;
2360                                 incomplete = true;
2361                                 break;
2362                         }
2363                         goto errout;
2364                 }
2365                 i++;
2366         }
2367
2368         nla_nest_end(skb, option_list);
2369         genlmsg_end(skb, hdr);
2370         if (incomplete)
2371                 goto start_again;
2372
2373 send_done:
2374         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2375         if (!nlh) {
2376                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2377                 if (err)
2378                         goto errout;
2379                 goto send_done;
2380         }
2381
2382         return send_func(skb, team, portid);
2383
2384 nla_put_failure:
2385         err = -EMSGSIZE;
2386 errout:
2387         genlmsg_cancel(skb, hdr);
2388         nlmsg_free(skb);
2389         return err;
2390 }
2391
2392 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2393 {
2394         struct team *team;
2395         struct team_option_inst *opt_inst;
2396         int err;
2397         LIST_HEAD(sel_opt_inst_list);
2398
2399         team = team_nl_team_get(info);
2400         if (!team)
2401                 return -EINVAL;
2402
2403         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2404                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2405         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2406                                        NLM_F_ACK, team_nl_send_unicast,
2407                                        &sel_opt_inst_list);
2408
2409         team_nl_team_put(team);
2410
2411         return err;
2412 }
2413
2414 static int team_nl_send_event_options_get(struct team *team,
2415                                           struct list_head *sel_opt_inst_list);
2416
2417 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2418 {
2419         struct team *team;
2420         int err = 0;
2421         int i;
2422         struct nlattr *nl_option;
2423         LIST_HEAD(opt_inst_list);
2424
2425         team = team_nl_team_get(info);
2426         if (!team)
2427                 return -EINVAL;
2428
2429         err = -EINVAL;
2430         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2431                 err = -EINVAL;
2432                 goto team_put;
2433         }
2434
2435         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2436                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2437                 struct nlattr *attr;
2438                 struct nlattr *attr_data;
2439                 enum team_option_type opt_type;
2440                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2441                 u32 opt_array_index = 0;
2442                 bool opt_is_array = false;
2443                 struct team_option_inst *opt_inst;
2444                 char *opt_name;
2445                 bool opt_found = false;
2446
2447                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2448                         err = -EINVAL;
2449                         goto team_put;
2450                 }
2451                 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2452                                        nl_option, team_nl_option_policy);
2453                 if (err)
2454                         goto team_put;
2455                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2456                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2457                         err = -EINVAL;
2458                         goto team_put;
2459                 }
2460                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2461                 case NLA_U32:
2462                         opt_type = TEAM_OPTION_TYPE_U32;
2463                         break;
2464                 case NLA_STRING:
2465                         opt_type = TEAM_OPTION_TYPE_STRING;
2466                         break;
2467                 case NLA_BINARY:
2468                         opt_type = TEAM_OPTION_TYPE_BINARY;
2469                         break;
2470                 case NLA_FLAG:
2471                         opt_type = TEAM_OPTION_TYPE_BOOL;
2472                         break;
2473                 case NLA_S32:
2474                         opt_type = TEAM_OPTION_TYPE_S32;
2475                         break;
2476                 default:
2477                         goto team_put;
2478                 }
2479
2480                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2481                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2482                         err = -EINVAL;
2483                         goto team_put;
2484                 }
2485
2486                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2487                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2488                 if (attr)
2489                         opt_port_ifindex = nla_get_u32(attr);
2490
2491                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2492                 if (attr) {
2493                         opt_is_array = true;
2494                         opt_array_index = nla_get_u32(attr);
2495                 }
2496
2497                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2498                         struct team_option *option = opt_inst->option;
2499                         struct team_gsetter_ctx ctx;
2500                         struct team_option_inst_info *opt_inst_info;
2501                         int tmp_ifindex;
2502
2503                         opt_inst_info = &opt_inst->info;
2504                         tmp_ifindex = opt_inst_info->port ?
2505                                       opt_inst_info->port->dev->ifindex : 0;
2506                         if (option->type != opt_type ||
2507                             strcmp(option->name, opt_name) ||
2508                             tmp_ifindex != opt_port_ifindex ||
2509                             (option->array_size && !opt_is_array) ||
2510                             opt_inst_info->array_index != opt_array_index)
2511                                 continue;
2512                         opt_found = true;
2513                         ctx.info = opt_inst_info;
2514                         switch (opt_type) {
2515                         case TEAM_OPTION_TYPE_U32:
2516                                 ctx.data.u32_val = nla_get_u32(attr_data);
2517                                 break;
2518                         case TEAM_OPTION_TYPE_STRING:
2519                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2520                                         err = -EINVAL;
2521                                         goto team_put;
2522                                 }
2523                                 ctx.data.str_val = nla_data(attr_data);
2524                                 break;
2525                         case TEAM_OPTION_TYPE_BINARY:
2526                                 ctx.data.bin_val.len = nla_len(attr_data);
2527                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2528                                 break;
2529                         case TEAM_OPTION_TYPE_BOOL:
2530                                 ctx.data.bool_val = attr_data ? true : false;
2531                                 break;
2532                         case TEAM_OPTION_TYPE_S32:
2533                                 ctx.data.s32_val = nla_get_s32(attr_data);
2534                                 break;
2535                         default:
2536                                 BUG();
2537                         }
2538                         err = team_option_set(team, opt_inst, &ctx);
2539                         if (err)
2540                                 goto team_put;
2541                         opt_inst->changed = true;
2542                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2543                 }
2544                 if (!opt_found) {
2545                         err = -ENOENT;
2546                         goto team_put;
2547                 }
2548         }
2549
2550         err = team_nl_send_event_options_get(team, &opt_inst_list);
2551
2552 team_put:
2553         team_nl_team_put(team);
2554
2555         return err;
2556 }
2557
2558 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2559                                      struct team_port *port)
2560 {
2561         struct nlattr *port_item;
2562
2563         port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2564         if (!port_item)
2565                 goto nest_cancel;
2566         if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2567                 goto nest_cancel;
2568         if (port->changed) {
2569                 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2570                         goto nest_cancel;
2571                 port->changed = false;
2572         }
2573         if ((port->removed &&
2574              nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2575             (port->state.linkup &&
2576              nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2577             nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2578             nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2579                 goto nest_cancel;
2580         nla_nest_end(skb, port_item);
2581         return 0;
2582
2583 nest_cancel:
2584         nla_nest_cancel(skb, port_item);
2585         return -EMSGSIZE;
2586 }
2587
2588 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2589                                       int flags, team_nl_send_func_t *send_func,
2590                                       struct team_port *one_port)
2591 {
2592         struct nlattr *port_list;
2593         struct nlmsghdr *nlh;
2594         void *hdr;
2595         struct team_port *port;
2596         int err;
2597         struct sk_buff *skb = NULL;
2598         bool incomplete;
2599         int i;
2600
2601         port = list_first_entry_or_null(&team->port_list,
2602                                         struct team_port, list);
2603
2604 start_again:
2605         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2606         if (err)
2607                 return err;
2608
2609         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2610                           TEAM_CMD_PORT_LIST_GET);
2611         if (!hdr)
2612                 return -EMSGSIZE;
2613
2614         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2615                 goto nla_put_failure;
2616         port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2617         if (!port_list)
2618                 goto nla_put_failure;
2619
2620         i = 0;
2621         incomplete = false;
2622
2623         /* If one port is selected, called wants to send port list containing
2624          * only this port. Otherwise go through all listed ports and send all
2625          */
2626         if (one_port) {
2627                 err = team_nl_fill_one_port_get(skb, one_port);
2628                 if (err)
2629                         goto errout;
2630         } else if (port) {
2631                 list_for_each_entry_from(port, &team->port_list, list) {
2632                         err = team_nl_fill_one_port_get(skb, port);
2633                         if (err) {
2634                                 if (err == -EMSGSIZE) {
2635                                         if (!i)
2636                                                 goto errout;
2637                                         incomplete = true;
2638                                         break;
2639                                 }
2640                                 goto errout;
2641                         }
2642                         i++;
2643                 }
2644         }
2645
2646         nla_nest_end(skb, port_list);
2647         genlmsg_end(skb, hdr);
2648         if (incomplete)
2649                 goto start_again;
2650
2651 send_done:
2652         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2653         if (!nlh) {
2654                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2655                 if (err)
2656                         goto errout;
2657                 goto send_done;
2658         }
2659
2660         return send_func(skb, team, portid);
2661
2662 nla_put_failure:
2663         err = -EMSGSIZE;
2664 errout:
2665         genlmsg_cancel(skb, hdr);
2666         nlmsg_free(skb);
2667         return err;
2668 }
2669
2670 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2671                                      struct genl_info *info)
2672 {
2673         struct team *team;
2674         int err;
2675
2676         team = team_nl_team_get(info);
2677         if (!team)
2678                 return -EINVAL;
2679
2680         err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2681                                          NLM_F_ACK, team_nl_send_unicast, NULL);
2682
2683         team_nl_team_put(team);
2684
2685         return err;
2686 }
2687
2688 static const struct genl_ops team_nl_ops[] = {
2689         {
2690                 .cmd = TEAM_CMD_NOOP,
2691                 .doit = team_nl_cmd_noop,
2692                 .policy = team_nl_policy,
2693         },
2694         {
2695                 .cmd = TEAM_CMD_OPTIONS_SET,
2696                 .doit = team_nl_cmd_options_set,
2697                 .policy = team_nl_policy,
2698                 .flags = GENL_ADMIN_PERM,
2699         },
2700         {
2701                 .cmd = TEAM_CMD_OPTIONS_GET,
2702                 .doit = team_nl_cmd_options_get,
2703                 .policy = team_nl_policy,
2704                 .flags = GENL_ADMIN_PERM,
2705         },
2706         {
2707                 .cmd = TEAM_CMD_PORT_LIST_GET,
2708                 .doit = team_nl_cmd_port_list_get,
2709                 .policy = team_nl_policy,
2710                 .flags = GENL_ADMIN_PERM,
2711         },
2712 };
2713
2714 static const struct genl_multicast_group team_nl_mcgrps[] = {
2715         { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2716 };
2717
2718 static int team_nl_send_multicast(struct sk_buff *skb,
2719                                   struct team *team, u32 portid)
2720 {
2721         return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2722                                        skb, 0, 0, GFP_KERNEL);
2723 }
2724
2725 static int team_nl_send_event_options_get(struct team *team,
2726                                           struct list_head *sel_opt_inst_list)
2727 {
2728         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2729                                         sel_opt_inst_list);
2730 }
2731
2732 static int team_nl_send_event_port_get(struct team *team,
2733                                        struct team_port *port)
2734 {
2735         return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2736                                           port);
2737 }
2738
2739 static int team_nl_init(void)
2740 {
2741         return genl_register_family_with_ops_groups(&team_nl_family, team_nl_ops,
2742                                                     team_nl_mcgrps);
2743 }
2744
2745 static void team_nl_fini(void)
2746 {
2747         genl_unregister_family(&team_nl_family);
2748 }
2749
2750
2751 /******************
2752  * Change checkers
2753  ******************/
2754
2755 static void __team_options_change_check(struct team *team)
2756 {
2757         int err;
2758         struct team_option_inst *opt_inst;
2759         LIST_HEAD(sel_opt_inst_list);
2760
2761         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2762                 if (opt_inst->changed)
2763                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2764         }
2765         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2766         if (err && err != -ESRCH)
2767                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2768                             err);
2769 }
2770
2771 /* rtnl lock is held */
2772
2773 static void __team_port_change_send(struct team_port *port, bool linkup)
2774 {
2775         int err;
2776
2777         port->changed = true;
2778         port->state.linkup = linkup;
2779         team_refresh_port_linkup(port);
2780         if (linkup) {
2781                 struct ethtool_cmd ecmd;
2782
2783                 err = __ethtool_get_settings(port->dev, &ecmd);
2784                 if (!err) {
2785                         port->state.speed = ethtool_cmd_speed(&ecmd);
2786                         port->state.duplex = ecmd.duplex;
2787                         goto send_event;
2788                 }
2789         }
2790         port->state.speed = 0;
2791         port->state.duplex = 0;
2792
2793 send_event:
2794         err = team_nl_send_event_port_get(port->team, port);
2795         if (err && err != -ESRCH)
2796                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2797                             port->dev->name, err);
2798
2799 }
2800
2801 static void __team_carrier_check(struct team *team)
2802 {
2803         struct team_port *port;
2804         bool team_linkup;
2805
2806         if (team->user_carrier_enabled)
2807                 return;
2808
2809         team_linkup = false;
2810         list_for_each_entry(port, &team->port_list, list) {
2811                 if (port->linkup) {
2812                         team_linkup = true;
2813                         break;
2814                 }
2815         }
2816
2817         if (team_linkup)
2818                 netif_carrier_on(team->dev);
2819         else
2820                 netif_carrier_off(team->dev);
2821 }
2822
2823 static void __team_port_change_check(struct team_port *port, bool linkup)
2824 {
2825         if (port->state.linkup != linkup)
2826                 __team_port_change_send(port, linkup);
2827         __team_carrier_check(port->team);
2828 }
2829
2830 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2831 {
2832         __team_port_change_send(port, linkup);
2833         __team_carrier_check(port->team);
2834 }
2835
2836 static void __team_port_change_port_removed(struct team_port *port)
2837 {
2838         port->removed = true;
2839         __team_port_change_send(port, false);
2840         __team_carrier_check(port->team);
2841 }
2842
2843 static void team_port_change_check(struct team_port *port, bool linkup)
2844 {
2845         struct team *team = port->team;
2846
2847         mutex_lock(&team->lock);
2848         __team_port_change_check(port, linkup);
2849         mutex_unlock(&team->lock);
2850 }
2851
2852
2853 /************************************
2854  * Net device notifier event handler
2855  ************************************/
2856
2857 static int team_device_event(struct notifier_block *unused,
2858                              unsigned long event, void *ptr)
2859 {
2860         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2861         struct team_port *port;
2862
2863         port = team_port_get_rtnl(dev);
2864         if (!port)
2865                 return NOTIFY_DONE;
2866
2867         switch (event) {
2868         case NETDEV_UP:
2869                 if (netif_carrier_ok(dev))
2870                         team_port_change_check(port, true);
2871                 break;
2872         case NETDEV_DOWN:
2873                 team_port_change_check(port, false);
2874                 break;
2875         case NETDEV_CHANGE:
2876                 if (netif_running(port->dev))
2877                         team_port_change_check(port,
2878                                                !!netif_carrier_ok(port->dev));
2879                 break;
2880         case NETDEV_UNREGISTER:
2881                 team_del_slave(port->team->dev, dev);
2882                 break;
2883         case NETDEV_FEAT_CHANGE:
2884                 team_compute_features(port->team);
2885                 break;
2886         case NETDEV_PRECHANGEMTU:
2887                 /* Forbid to change mtu of underlaying device */
2888                 if (!port->team->port_mtu_change_allowed)
2889                         return NOTIFY_BAD;
2890                 break;
2891         case NETDEV_PRE_TYPE_CHANGE:
2892                 /* Forbid to change type of underlaying device */
2893                 return NOTIFY_BAD;
2894         case NETDEV_RESEND_IGMP:
2895                 /* Propagate to master device */
2896                 call_netdevice_notifiers(event, port->team->dev);
2897                 break;
2898         }
2899         return NOTIFY_DONE;
2900 }
2901
2902 static struct notifier_block team_notifier_block __read_mostly = {
2903         .notifier_call = team_device_event,
2904 };
2905
2906
2907 /***********************
2908  * Module init and exit
2909  ***********************/
2910
2911 static int __init team_module_init(void)
2912 {
2913         int err;
2914
2915         register_netdevice_notifier(&team_notifier_block);
2916
2917         err = rtnl_link_register(&team_link_ops);
2918         if (err)
2919                 goto err_rtnl_reg;
2920
2921         err = team_nl_init();
2922         if (err)
2923                 goto err_nl_init;
2924
2925         return 0;
2926
2927 err_nl_init:
2928         rtnl_link_unregister(&team_link_ops);
2929
2930 err_rtnl_reg:
2931         unregister_netdevice_notifier(&team_notifier_block);
2932
2933         return err;
2934 }
2935
2936 static void __exit team_module_exit(void)
2937 {
2938         team_nl_fini();
2939         rtnl_link_unregister(&team_link_ops);
2940         unregister_netdevice_notifier(&team_notifier_block);
2941 }
2942
2943 module_init(team_module_init);
2944 module_exit(team_module_exit);
2945
2946 MODULE_LICENSE("GPL v2");
2947 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2948 MODULE_DESCRIPTION("Ethernet team device driver");
2949 MODULE_ALIAS_RTNL_LINK(DRV_NAME);