kernel/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
 998 static void __team_compute_features(struct team *team)
 999 {
1000         ___team_compute_features(team);
1001         netdev_change_features(team->dev);
1002 }
1003
1004 static void team_compute_features(struct team *team)
1005 {
1006         mutex_lock(&team->lock);
1007         ___team_compute_features(team);
1008         mutex_unlock(&team->lock);
1009         netdev_change_features(team->dev);
1010 }
1011
1012 static int team_port_enter(struct team *team, struct team_port *port)
1013 {
1014         int err = 0;
1015
1016         dev_hold(team->dev);
1017         if (team->ops.port_enter) {
1018                 err = team->ops.port_enter(team, port);
1019                 if (err) {
1020                         netdev_err(team->dev, "Device %s failed to enter team mode\n",
1021                                    port->dev->name);
1022                         goto err_port_enter;
1023                 }
1024         }
1025
1026         return 0;
1027
1028 err_port_enter:
1029         dev_put(team->dev);
1030
1031         return err;
1032 }
1033
1034 static void team_port_leave(struct team *team, struct team_port *port)
1035 {
1036         if (team->ops.port_leave)
1037                 team->ops.port_leave(team, port);
1038         dev_put(team->dev);
1039 }
1040
1041 #ifdef CONFIG_NET_POLL_CONTROLLER
1042 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1043 {
1044         struct netpoll *np;
1045         int err;
1046
1047         if (!team->dev->npinfo)
1048                 return 0;
1049
1050         np = kzalloc(sizeof(*np), GFP_KERNEL);
1051         if (!np)
1052                 return -ENOMEM;
1053
1054         err = __netpoll_setup(np, port->dev);
1055         if (err) {
1056                 kfree(np);
1057                 return err;
1058         }
1059         port->np = np;
1060         return err;
1061 }
1062
1063 static void team_port_disable_netpoll(struct team_port *port)
1064 {
1065         struct netpoll *np = port->np;
1066
1067         if (!np)
1068                 return;
1069         port->np = NULL;
1070
1071         /* Wait for transmitting packets to finish before freeing. */
1072         synchronize_rcu_bh();
1073         __netpoll_cleanup(np);
1074         kfree(np);
1075 }
1076 #else
1077 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1078 {
1079         return 0;
1080 }
1081 static void team_port_disable_netpoll(struct team_port *port)
1082 {
1083 }
1084 #endif
1085
1086 static int team_upper_dev_link(struct net_device *dev,
1087                                struct net_device *port_dev)
1088 {
1089         int err;
1090
1091         err = netdev_master_upper_dev_link(port_dev, dev);
1092         if (err)
1093                 return err;
1094         port_dev->priv_flags |= IFF_TEAM_PORT;
1095         return 0;
1096 }
1097
1098 static void team_upper_dev_unlink(struct net_device *dev,
1099                                   struct net_device *port_dev)
1100 {
1101         netdev_upper_dev_unlink(port_dev, dev);
1102         port_dev->priv_flags &= ~IFF_TEAM_PORT;
1103 }
1104
1105 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1106 static int team_dev_type_check_change(struct net_device *dev,
1107                                       struct net_device *port_dev);
1108
1109 static int team_port_add(struct team *team, struct net_device *port_dev)
1110 {
1111         struct net_device *dev = team->dev;
1112         struct team_port *port;
1113         char *portname = port_dev->name;
1114         int err;
1115
1116         if (port_dev->flags & IFF_LOOPBACK) {
1117                 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1118                            portname);
1119                 return -EINVAL;
1120         }
1121
1122         if (team_port_exists(port_dev)) {
1123                 netdev_err(dev, "Device %s is already a port "
1124                                 "of a team device\n", portname);
1125                 return -EBUSY;
1126         }
1127
1128         if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1129             vlan_uses_dev(dev)) {
1130                 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1131                            portname);
1132                 return -EPERM;
1133         }
1134
1135         err = team_dev_type_check_change(dev, port_dev);
1136         if (err)
1137                 return err;
1138
1139         if (port_dev->flags & IFF_UP) {
1140                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1141                            portname);
1142                 return -EBUSY;
1143         }
1144
1145         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1146                        GFP_KERNEL);
1147         if (!port)
1148                 return -ENOMEM;
1149
1150         port->dev = port_dev;
1151         port->team = team;
1152         INIT_LIST_HEAD(&port->qom_list);
1153
1154         port->orig.mtu = port_dev->mtu;
1155         err = dev_set_mtu(port_dev, dev->mtu);
1156         if (err) {
1157                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1158                 goto err_set_mtu;
1159         }
1160
1161         memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1162
1163         err = team_port_enter(team, port);
1164         if (err) {
1165                 netdev_err(dev, "Device %s failed to enter team mode\n",
1166                            portname);
1167                 goto err_port_enter;
1168         }
1169
1170         err = dev_open(port_dev);
1171         if (err) {
1172                 netdev_dbg(dev, "Device %s opening failed\n",
1173                            portname);
1174                 goto err_dev_open;
1175         }
1176
1177         err = vlan_vids_add_by_dev(port_dev, dev);
1178         if (err) {
1179                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1180                                 portname);
1181                 goto err_vids_add;
1182         }
1183
1184         err = team_port_enable_netpoll(team, port);
1185         if (err) {
1186                 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1187                            portname);
1188                 goto err_enable_netpoll;
1189         }
1190
1191         if (!(dev->features & NETIF_F_LRO))
1192                 dev_disable_lro(port_dev);
1193
1194         err = netdev_rx_handler_register(port_dev, team_handle_frame,
1195                                          port);
1196         if (err) {
1197                 netdev_err(dev, "Device %s failed to register rx_handler\n",
1198                            portname);
1199                 goto err_handler_register;
1200         }
1201
1202         err = team_upper_dev_link(dev, port_dev);
1203         if (err) {
1204                 netdev_err(dev, "Device %s failed to set upper link\n",
1205                            portname);
1206                 goto err_set_upper_link;
1207         }
1208
1209         err = __team_option_inst_add_port(team, port);
1210         if (err) {
1211                 netdev_err(dev, "Device %s failed to add per-port options\n",
1212                            portname);
1213                 goto err_option_port_add;
1214         }
1215
1216         port->index = -1;
1217         list_add_tail_rcu(&port->list, &team->port_list);
1218         team_port_enable(team, port);
1219         __team_compute_features(team);
1220         __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1221         __team_options_change_check(team);
1222
1223         netdev_info(dev, "Port device %s added\n", portname);
1224
1225         return 0;
1226
1227 err_option_port_add:
1228         team_upper_dev_unlink(dev, port_dev);
1229
1230 err_set_upper_link:
1231         netdev_rx_handler_unregister(port_dev);
1232
1233 err_handler_register:
1234         team_port_disable_netpoll(port);
1235
1236 err_enable_netpoll:
1237         vlan_vids_del_by_dev(port_dev, dev);
1238
1239 err_vids_add:
1240         dev_close(port_dev);
1241
1242 err_dev_open:
1243         team_port_leave(team, port);
1244         team_port_set_orig_dev_addr(port);
1245
1246 err_port_enter:
1247         dev_set_mtu(port_dev, port->orig.mtu);
1248
1249 err_set_mtu:
1250         kfree(port);
1251
1252         return err;
1253 }
1254
1255 static void __team_port_change_port_removed(struct team_port *port);
1256
1257 static int team_port_del(struct team *team, struct net_device *port_dev)
1258 {
1259         struct net_device *dev = team->dev;
1260         struct team_port *port;
1261         char *portname = port_dev->name;
1262
1263         port = team_port_get_rtnl(port_dev);
1264         if (!port || !team_port_find(team, port)) {
1265                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1266                            portname);
1267                 return -ENOENT;
1268         }
1269
1270         team_port_disable(team, port);
1271         list_del_rcu(&port->list);
1272         team_upper_dev_unlink(dev, port_dev);
1273         netdev_rx_handler_unregister(port_dev);
1274         team_port_disable_netpoll(port);
1275         vlan_vids_del_by_dev(port_dev, dev);
1276         dev_uc_unsync(port_dev, dev);
1277         dev_mc_unsync(port_dev, dev);
1278         dev_close(port_dev);
1279         team_port_leave(team, port);
1280
1281         __team_option_inst_mark_removed_port(team, port);
1282         __team_options_change_check(team);
1283         __team_option_inst_del_port(team, port);
1284         __team_port_change_port_removed(port);
1285
1286         team_port_set_orig_dev_addr(port);
1287         dev_set_mtu(port_dev, port->orig.mtu);
1288         kfree_rcu(port, rcu);
1289         netdev_info(dev, "Port device %s removed\n", portname);
1290         __team_compute_features(team);
1291
1292         return 0;
1293 }
1294
1295
1296 /*****************
1297  * Net device ops
1298  *****************/
1299
1300 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1301 {
1302         ctx->data.str_val = team->mode->kind;
1303         return 0;
1304 }
1305
1306 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1307 {
1308         return team_change_mode(team, ctx->data.str_val);
1309 }
1310
1311 static int team_notify_peers_count_get(struct team *team,
1312                                        struct team_gsetter_ctx *ctx)
1313 {
1314         ctx->data.u32_val = team->notify_peers.count;
1315         return 0;
1316 }
1317
1318 static int team_notify_peers_count_set(struct team *team,
1319                                        struct team_gsetter_ctx *ctx)
1320 {
1321         team->notify_peers.count = ctx->data.u32_val;
1322         return 0;
1323 }
1324
1325 static int team_notify_peers_interval_get(struct team *team,
1326                                           struct team_gsetter_ctx *ctx)
1327 {
1328         ctx->data.u32_val = team->notify_peers.interval;
1329         return 0;
1330 }
1331
1332 static int team_notify_peers_interval_set(struct team *team,
1333                                           struct team_gsetter_ctx *ctx)
1334 {
1335         team->notify_peers.interval = ctx->data.u32_val;
1336         return 0;
1337 }
1338
1339 static int team_mcast_rejoin_count_get(struct team *team,
1340                                        struct team_gsetter_ctx *ctx)
1341 {
1342         ctx->data.u32_val = team->mcast_rejoin.count;
1343         return 0;
1344 }
1345
1346 static int team_mcast_rejoin_count_set(struct team *team,
1347                                        struct team_gsetter_ctx *ctx)
1348 {
1349         team->mcast_rejoin.count = ctx->data.u32_val;
1350         return 0;
1351 }
1352
1353 static int team_mcast_rejoin_interval_get(struct team *team,
1354                                           struct team_gsetter_ctx *ctx)
1355 {
1356         ctx->data.u32_val = team->mcast_rejoin.interval;
1357         return 0;
1358 }
1359
1360 static int team_mcast_rejoin_interval_set(struct team *team,
1361                                           struct team_gsetter_ctx *ctx)
1362 {
1363         team->mcast_rejoin.interval = ctx->data.u32_val;
1364         return 0;
1365 }
1366
1367 static int team_port_en_option_get(struct team *team,
1368                                    struct team_gsetter_ctx *ctx)
1369 {
1370         struct team_port *port = ctx->info->port;
1371
1372         ctx->data.bool_val = team_port_enabled(port);
1373         return 0;
1374 }
1375
1376 static int team_port_en_option_set(struct team *team,
1377                                    struct team_gsetter_ctx *ctx)
1378 {
1379         struct team_port *port = ctx->info->port;
1380
1381         if (ctx->data.bool_val)
1382                 team_port_enable(team, port);
1383         else
1384                 team_port_disable(team, port);
1385         return 0;
1386 }
1387
1388 static int team_user_linkup_option_get(struct team *team,
1389                                        struct team_gsetter_ctx *ctx)
1390 {
1391         struct team_port *port = ctx->info->port;
1392
1393         ctx->data.bool_val = port->user.linkup;
1394         return 0;
1395 }
1396
1397 static void __team_carrier_check(struct team *team);
1398
1399 static int team_user_linkup_option_set(struct team *team,
1400                                        struct team_gsetter_ctx *ctx)
1401 {
1402         struct team_port *port = ctx->info->port;
1403
1404         port->user.linkup = ctx->data.bool_val;
1405         team_refresh_port_linkup(port);
1406         __team_carrier_check(port->team);
1407         return 0;
1408 }
1409
1410 static int team_user_linkup_en_option_get(struct team *team,
1411                                           struct team_gsetter_ctx *ctx)
1412 {
1413         struct team_port *port = ctx->info->port;
1414
1415         ctx->data.bool_val = port->user.linkup_enabled;
1416         return 0;
1417 }
1418
1419 static int team_user_linkup_en_option_set(struct team *team,
1420                                           struct team_gsetter_ctx *ctx)
1421 {
1422         struct team_port *port = ctx->info->port;
1423
1424         port->user.linkup_enabled = ctx->data.bool_val;
1425         team_refresh_port_linkup(port);
1426         __team_carrier_check(port->team);
1427         return 0;
1428 }
1429
1430 static int team_priority_option_get(struct team *team,
1431                                     struct team_gsetter_ctx *ctx)
1432 {
1433         struct team_port *port = ctx->info->port;
1434
1435         ctx->data.s32_val = port->priority;
1436         return 0;
1437 }
1438
1439 static int team_priority_option_set(struct team *team,
1440                                     struct team_gsetter_ctx *ctx)
1441 {
1442         struct team_port *port = ctx->info->port;
1443         s32 priority = ctx->data.s32_val;
1444
1445         if (port->priority == priority)
1446                 return 0;
1447         port->priority = priority;
1448         team_queue_override_port_prio_changed(team, port);
1449         return 0;
1450 }
1451
1452 static int team_queue_id_option_get(struct team *team,
1453                                     struct team_gsetter_ctx *ctx)
1454 {
1455         struct team_port *port = ctx->info->port;
1456
1457         ctx->data.u32_val = port->queue_id;
1458         return 0;
1459 }
1460
1461 static int team_queue_id_option_set(struct team *team,
1462                                     struct team_gsetter_ctx *ctx)
1463 {
1464         struct team_port *port = ctx->info->port;
1465         u16 new_queue_id = ctx->data.u32_val;
1466
1467         if (port->queue_id == new_queue_id)
1468                 return 0;
1469         if (new_queue_id >= team->dev->real_num_tx_queues)
1470                 return -EINVAL;
1471         team_queue_override_port_change_queue_id(team, port, new_queue_id);
1472         return 0;
1473 }
1474
1475 static const struct team_option team_options[] = {
1476         {
1477                 .name = "mode",
1478                 .type = TEAM_OPTION_TYPE_STRING,
1479                 .getter = team_mode_option_get,
1480                 .setter = team_mode_option_set,
1481         },
1482         {
1483                 .name = "notify_peers_count",
1484                 .type = TEAM_OPTION_TYPE_U32,
1485                 .getter = team_notify_peers_count_get,
1486                 .setter = team_notify_peers_count_set,
1487         },
1488         {
1489                 .name = "notify_peers_interval",
1490                 .type = TEAM_OPTION_TYPE_U32,
1491                 .getter = team_notify_peers_interval_get,
1492                 .setter = team_notify_peers_interval_set,
1493         },
1494         {
1495                 .name = "mcast_rejoin_count",
1496                 .type = TEAM_OPTION_TYPE_U32,
1497                 .getter = team_mcast_rejoin_count_get,
1498                 .setter = team_mcast_rejoin_count_set,
1499         },
1500         {
1501                 .name = "mcast_rejoin_interval",
1502                 .type = TEAM_OPTION_TYPE_U32,
1503                 .getter = team_mcast_rejoin_interval_get,
1504                 .setter = team_mcast_rejoin_interval_set,
1505         },
1506         {
1507                 .name = "enabled",
1508                 .type = TEAM_OPTION_TYPE_BOOL,
1509                 .per_port = true,
1510                 .getter = team_port_en_option_get,
1511                 .setter = team_port_en_option_set,
1512         },
1513         {
1514                 .name = "user_linkup",
1515                 .type = TEAM_OPTION_TYPE_BOOL,
1516                 .per_port = true,
1517                 .getter = team_user_linkup_option_get,
1518                 .setter = team_user_linkup_option_set,
1519         },
1520         {
1521                 .name = "user_linkup_enabled",
1522                 .type = TEAM_OPTION_TYPE_BOOL,
1523                 .per_port = true,
1524                 .getter = team_user_linkup_en_option_get,
1525                 .setter = team_user_linkup_en_option_set,
1526         },
1527         {
1528                 .name = "priority",
1529                 .type = TEAM_OPTION_TYPE_S32,
1530                 .per_port = true,
1531                 .getter = team_priority_option_get,
1532                 .setter = team_priority_option_set,
1533         },
1534         {
1535                 .name = "queue_id",
1536                 .type = TEAM_OPTION_TYPE_U32,
1537                 .per_port = true,
1538                 .getter = team_queue_id_option_get,
1539                 .setter = team_queue_id_option_set,
1540         },
1541 };
1542
1543 static struct lock_class_key team_netdev_xmit_lock_key;
1544 static struct lock_class_key team_netdev_addr_lock_key;
1545 static struct lock_class_key team_tx_busylock_key;
1546
1547 static void team_set_lockdep_class_one(struct net_device *dev,
1548                                        struct netdev_queue *txq,
1549                                        void *unused)
1550 {
1551         lockdep_set_class(&txq->_xmit_lock, &team_netdev_xmit_lock_key);
1552 }
1553
1554 static void team_set_lockdep_class(struct net_device *dev)
1555 {
1556         lockdep_set_class(&dev->addr_list_lock, &team_netdev_addr_lock_key);
1557         netdev_for_each_tx_queue(dev, team_set_lockdep_class_one, NULL);
1558         dev->qdisc_tx_busylock = &team_tx_busylock_key;
1559 }
1560
1561 static int team_init(struct net_device *dev)
1562 {
1563         struct team *team = netdev_priv(dev);
1564         int i;
1565         int err;
1566
1567         team->dev = dev;
1568         mutex_init(&team->lock);
1569         team_set_no_mode(team);
1570
1571         team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1572         if (!team->pcpu_stats)
1573                 return -ENOMEM;
1574
1575         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1576                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1577         INIT_LIST_HEAD(&team->port_list);
1578         err = team_queue_override_init(team);
1579         if (err)
1580                 goto err_team_queue_override_init;
1581
1582         team_adjust_ops(team);
1583
1584         INIT_LIST_HEAD(&team->option_list);
1585         INIT_LIST_HEAD(&team->option_inst_list);
1586
1587         team_notify_peers_init(team);
1588         team_mcast_rejoin_init(team);
1589
1590         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1591         if (err)
1592                 goto err_options_register;
1593         netif_carrier_off(dev);
1594
1595         team_set_lockdep_class(dev);
1596
1597         return 0;
1598
1599 err_options_register:
1600         team_mcast_rejoin_fini(team);
1601         team_notify_peers_fini(team);
1602         team_queue_override_fini(team);
1603 err_team_queue_override_init:
1604         free_percpu(team->pcpu_stats);
1605
1606         return err;
1607 }
1608
1609 static void team_uninit(struct net_device *dev)
1610 {
1611         struct team *team = netdev_priv(dev);
1612         struct team_port *port;
1613         struct team_port *tmp;
1614
1615         mutex_lock(&team->lock);
1616         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1617                 team_port_del(team, port->dev);
1618
1619         __team_change_mode(team, NULL); /* cleanup */
1620         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1621         team_mcast_rejoin_fini(team);
1622         team_notify_peers_fini(team);
1623         team_queue_override_fini(team);
1624         mutex_unlock(&team->lock);
1625 }
1626
1627 static void team_destructor(struct net_device *dev)
1628 {
1629         struct team *team = netdev_priv(dev);
1630
1631         free_percpu(team->pcpu_stats);
1632         free_netdev(dev);
1633 }
1634
1635 static int team_open(struct net_device *dev)
1636 {
1637         return 0;
1638 }
1639
1640 static int team_close(struct net_device *dev)
1641 {
1642         return 0;
1643 }
1644
1645 /*
1646  * note: already called with rcu_read_lock
1647  */
1648 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1649 {
1650         struct team *team = netdev_priv(dev);
1651         bool tx_success;
1652         unsigned int len = skb->len;
1653
1654         tx_success = team_queue_override_transmit(team, skb);
1655         if (!tx_success)
1656                 tx_success = team->ops.transmit(team, skb);
1657         if (tx_success) {
1658                 struct team_pcpu_stats *pcpu_stats;
1659
1660                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1661                 u64_stats_update_begin(&pcpu_stats->syncp);
1662                 pcpu_stats->tx_packets++;
1663                 pcpu_stats->tx_bytes += len;
1664                 u64_stats_update_end(&pcpu_stats->syncp);
1665         } else {
1666                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1667         }
1668
1669         return NETDEV_TX_OK;
1670 }
1671
1672 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1673                              void *accel_priv, select_queue_fallback_t fallback)
1674 {
1675         /*
1676          * This helper function exists to help dev_pick_tx get the correct
1677          * destination queue.  Using a helper function skips a call to
1678          * skb_tx_hash and will put the skbs in the queue we expect on their
1679          * way down to the team driver.
1680          */
1681         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1682
1683         /*
1684          * Save the original txq to restore before passing to the driver
1685          */
1686         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1687
1688         if (unlikely(txq >= dev->real_num_tx_queues)) {
1689                 do {
1690                         txq -= dev->real_num_tx_queues;
1691                 } while (txq >= dev->real_num_tx_queues);
1692         }
1693         return txq;
1694 }
1695
1696 static void team_change_rx_flags(struct net_device *dev, int change)
1697 {
1698         struct team *team = netdev_priv(dev);
1699         struct team_port *port;
1700         int inc;
1701
1702         rcu_read_lock();
1703         list_for_each_entry_rcu(port, &team->port_list, list) {
1704                 if (change & IFF_PROMISC) {
1705                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1706                         dev_set_promiscuity(port->dev, inc);
1707                 }
1708                 if (change & IFF_ALLMULTI) {
1709                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1710                         dev_set_allmulti(port->dev, inc);
1711                 }
1712         }
1713         rcu_read_unlock();
1714 }
1715
1716 static void team_set_rx_mode(struct net_device *dev)
1717 {
1718         struct team *team = netdev_priv(dev);
1719         struct team_port *port;
1720
1721         rcu_read_lock();
1722         list_for_each_entry_rcu(port, &team->port_list, list) {
1723                 dev_uc_sync_multiple(port->dev, dev);
1724                 dev_mc_sync_multiple(port->dev, dev);
1725         }
1726         rcu_read_unlock();
1727 }
1728
1729 static int team_set_mac_address(struct net_device *dev, void *p)
1730 {
1731         struct sockaddr *addr = p;
1732         struct team *team = netdev_priv(dev);
1733         struct team_port *port;
1734
1735         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1736                 return -EADDRNOTAVAIL;
1737         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1738         mutex_lock(&team->lock);
1739         list_for_each_entry(port, &team->port_list, list)
1740                 if (team->ops.port_change_dev_addr)
1741                         team->ops.port_change_dev_addr(team, port);
1742         mutex_unlock(&team->lock);
1743         return 0;
1744 }
1745
1746 static int team_change_mtu(struct net_device *dev, int new_mtu)
1747 {
1748         struct team *team = netdev_priv(dev);
1749         struct team_port *port;
1750         int err;
1751
1752         /*
1753          * Alhough this is reader, it's guarded by team lock. It's not possible
1754          * to traverse list in reverse under rcu_read_lock
1755          */
1756         mutex_lock(&team->lock);
1757         team->port_mtu_change_allowed = true;
1758         list_for_each_entry(port, &team->port_list, list) {
1759                 err = dev_set_mtu(port->dev, new_mtu);
1760                 if (err) {
1761                         netdev_err(dev, "Device %s failed to change mtu",
1762                                    port->dev->name);
1763                         goto unwind;
1764                 }
1765         }
1766         team->port_mtu_change_allowed = false;
1767         mutex_unlock(&team->lock);
1768
1769         dev->mtu = new_mtu;
1770
1771         return 0;
1772
1773 unwind:
1774         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1775                 dev_set_mtu(port->dev, dev->mtu);
1776         team->port_mtu_change_allowed = false;
1777         mutex_unlock(&team->lock);
1778
1779         return err;
1780 }
1781
1782 static struct rtnl_link_stats64 *
1783 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1784 {
1785         struct team *team = netdev_priv(dev);
1786         struct team_pcpu_stats *p;
1787         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1788         u32 rx_dropped = 0, tx_dropped = 0;
1789         unsigned int start;
1790         int i;
1791
1792         for_each_possible_cpu(i) {
1793                 p = per_cpu_ptr(team->pcpu_stats, i);
1794                 do {
1795                         start = u64_stats_fetch_begin_irq(&p->syncp);
1796                         rx_packets      = p->rx_packets;
1797                         rx_bytes        = p->rx_bytes;
1798                         rx_multicast    = p->rx_multicast;
1799                         tx_packets      = p->tx_packets;
1800                         tx_bytes        = p->tx_bytes;
1801                 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1802
1803                 stats->rx_packets       += rx_packets;
1804                 stats->rx_bytes         += rx_bytes;
1805                 stats->multicast        += rx_multicast;
1806                 stats->tx_packets       += tx_packets;
1807                 stats->tx_bytes         += tx_bytes;
1808                 /*
1809                  * rx_dropped & tx_dropped are u32, updated
1810                  * without syncp protection.
1811                  */
1812                 rx_dropped      += p->rx_dropped;
1813                 tx_dropped      += p->tx_dropped;
1814         }
1815         stats->rx_dropped       = rx_dropped;
1816         stats->tx_dropped       = tx_dropped;
1817         return stats;
1818 }
1819
1820 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1821 {
1822         struct team *team = netdev_priv(dev);
1823         struct team_port *port;
1824         int err;
1825
1826         /*
1827          * Alhough this is reader, it's guarded by team lock. It's not possible
1828          * to traverse list in reverse under rcu_read_lock
1829          */
1830         mutex_lock(&team->lock);
1831         list_for_each_entry(port, &team->port_list, list) {
1832                 err = vlan_vid_add(port->dev, proto, vid);
1833                 if (err)
1834                         goto unwind;
1835         }
1836         mutex_unlock(&team->lock);
1837
1838         return 0;
1839
1840 unwind:
1841         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1842                 vlan_vid_del(port->dev, proto, vid);
1843         mutex_unlock(&team->lock);
1844
1845         return err;
1846 }
1847
1848 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1849 {
1850         struct team *team = netdev_priv(dev);
1851         struct team_port *port;
1852
1853         mutex_lock(&team->lock);
1854         list_for_each_entry(port, &team->port_list, list)
1855                 vlan_vid_del(port->dev, proto, vid);
1856         mutex_unlock(&team->lock);
1857
1858         return 0;
1859 }
1860
1861 #ifdef CONFIG_NET_POLL_CONTROLLER
1862 static void team_poll_controller(struct net_device *dev)
1863 {
1864 }
1865
1866 static void __team_netpoll_cleanup(struct team *team)
1867 {
1868         struct team_port *port;
1869
1870         list_for_each_entry(port, &team->port_list, list)
1871                 team_port_disable_netpoll(port);
1872 }
1873
1874 static void team_netpoll_cleanup(struct net_device *dev)
1875 {
1876         struct team *team = netdev_priv(dev);
1877
1878         mutex_lock(&team->lock);
1879         __team_netpoll_cleanup(team);
1880         mutex_unlock(&team->lock);
1881 }
1882
1883 static int team_netpoll_setup(struct net_device *dev,
1884                               struct netpoll_info *npifo)
1885 {
1886         struct team *team = netdev_priv(dev);
1887         struct team_port *port;
1888         int err = 0;
1889
1890         mutex_lock(&team->lock);
1891         list_for_each_entry(port, &team->port_list, list) {
1892                 err = team_port_enable_netpoll(team, port);
1893                 if (err) {
1894                         __team_netpoll_cleanup(team);
1895                         break;
1896                 }
1897         }
1898         mutex_unlock(&team->lock);
1899         return err;
1900 }
1901 #endif
1902
1903 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1904 {
1905         struct team *team = netdev_priv(dev);
1906         int err;
1907
1908         mutex_lock(&team->lock);
1909         err = team_port_add(team, port_dev);
1910         mutex_unlock(&team->lock);
1911         return err;
1912 }
1913
1914 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1915 {
1916         struct team *team = netdev_priv(dev);
1917         int err;
1918
1919         mutex_lock(&team->lock);
1920         err = team_port_del(team, port_dev);
1921         mutex_unlock(&team->lock);
1922         return err;
1923 }
1924
1925 static netdev_features_t team_fix_features(struct net_device *dev,
1926                                            netdev_features_t features)
1927 {
1928         struct team_port *port;
1929         struct team *team = netdev_priv(dev);
1930         netdev_features_t mask;
1931
1932         mask = features;
1933         features &= ~NETIF_F_ONE_FOR_ALL;
1934         features |= NETIF_F_ALL_FOR_ALL;
1935
1936         rcu_read_lock();
1937         list_for_each_entry_rcu(port, &team->port_list, list) {
1938                 features = netdev_increment_features(features,
1939                                                      port->dev->features,
1940                                                      mask);
1941         }
1942         rcu_read_unlock();
1943
1944         features = netdev_add_tso_features(features, mask);
1945
1946         return features;
1947 }
1948
1949 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1950 {
1951         struct team *team = netdev_priv(dev);
1952
1953         team->user_carrier_enabled = true;
1954
1955         if (new_carrier)
1956                 netif_carrier_on(dev);
1957         else
1958                 netif_carrier_off(dev);
1959         return 0;
1960 }
1961
1962 static const struct net_device_ops team_netdev_ops = {
1963         .ndo_init               = team_init,
1964         .ndo_uninit             = team_uninit,
1965         .ndo_open               = team_open,
1966         .ndo_stop               = team_close,
1967         .ndo_start_xmit         = team_xmit,
1968         .ndo_select_queue       = team_select_queue,
1969         .ndo_change_rx_flags    = team_change_rx_flags,
1970         .ndo_set_rx_mode        = team_set_rx_mode,
1971         .ndo_set_mac_address    = team_set_mac_address,
1972         .ndo_change_mtu         = team_change_mtu,
1973         .ndo_get_stats64        = team_get_stats64,
1974         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
1975         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
1976 #ifdef CONFIG_NET_POLL_CONTROLLER
1977         .ndo_poll_controller    = team_poll_controller,
1978         .ndo_netpoll_setup      = team_netpoll_setup,
1979         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
1980 #endif
1981         .ndo_add_slave          = team_add_slave,
1982         .ndo_del_slave          = team_del_slave,
1983         .ndo_fix_features       = team_fix_features,
1984         .ndo_change_carrier     = team_change_carrier,
1985         .ndo_bridge_setlink     = switchdev_port_bridge_setlink,
1986         .ndo_bridge_getlink     = switchdev_port_bridge_getlink,
1987         .ndo_bridge_dellink     = switchdev_port_bridge_dellink,
1988         .ndo_fdb_add            = switchdev_port_fdb_add,
1989         .ndo_fdb_del            = switchdev_port_fdb_del,
1990         .ndo_fdb_dump           = switchdev_port_fdb_dump,
1991         .ndo_features_check     = passthru_features_check,
1992 };
1993
1994 /***********************
1995  * ethtool interface
1996  ***********************/
1997
1998 static void team_ethtool_get_drvinfo(struct net_device *dev,
1999                                      struct ethtool_drvinfo *drvinfo)
2000 {
2001         strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2002         strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2003 }
2004
2005 static const struct ethtool_ops team_ethtool_ops = {
2006         .get_drvinfo            = team_ethtool_get_drvinfo,
2007         .get_link               = ethtool_op_get_link,
2008 };
2009
2010 /***********************
2011  * rt netlink interface
2012  ***********************/
2013
2014 static void team_setup_by_port(struct net_device *dev,
2015                                struct net_device *port_dev)
2016 {
2017         dev->header_ops = port_dev->header_ops;
2018         dev->type = port_dev->type;
2019         dev->hard_header_len = port_dev->hard_header_len;
2020         dev->addr_len = port_dev->addr_len;
2021         dev->mtu = port_dev->mtu;
2022         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2023         eth_hw_addr_inherit(dev, port_dev);
2024 }
2025
2026 static int team_dev_type_check_change(struct net_device *dev,
2027                                       struct net_device *port_dev)
2028 {
2029         struct team *team = netdev_priv(dev);
2030         char *portname = port_dev->name;
2031         int err;
2032
2033         if (dev->type == port_dev->type)
2034                 return 0;
2035         if (!list_empty(&team->port_list)) {
2036                 netdev_err(dev, "Device %s is of different type\n", portname);
2037                 return -EBUSY;
2038         }
2039         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2040         err = notifier_to_errno(err);
2041         if (err) {
2042                 netdev_err(dev, "Refused to change device type\n");
2043                 return err;
2044         }
2045         dev_uc_flush(dev);
2046         dev_mc_flush(dev);
2047         team_setup_by_port(dev, port_dev);
2048         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2049         return 0;
2050 }
2051
2052 static void team_setup(struct net_device *dev)
2053 {
2054         ether_setup(dev);
2055
2056         dev->netdev_ops = &team_netdev_ops;
2057         dev->ethtool_ops = &team_ethtool_ops;
2058         dev->destructor = team_destructor;
2059         dev->flags |= IFF_MULTICAST;
2060         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2061         dev->priv_flags |= IFF_NO_QUEUE;
2062
2063         /*
2064          * Indicate we support unicast address filtering. That way core won't
2065          * bring us to promisc mode in case a unicast addr is added.
2066          * Let this up to underlay drivers.
2067          */
2068         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2069
2070         dev->features |= NETIF_F_LLTX;
2071         dev->features |= NETIF_F_GRO;
2072
2073         /* Don't allow team devices to change network namespaces. */
2074         dev->features |= NETIF_F_NETNS_LOCAL;
2075
2076         dev->hw_features = TEAM_VLAN_FEATURES |
2077                            NETIF_F_HW_VLAN_CTAG_TX |
2078                            NETIF_F_HW_VLAN_CTAG_RX |
2079                            NETIF_F_HW_VLAN_CTAG_FILTER;
2080
2081         dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_HW_CSUM);
2082         dev->features |= dev->hw_features;
2083 }
2084
2085 static int team_newlink(struct net *src_net, struct net_device *dev,
2086                         struct nlattr *tb[], struct nlattr *data[])
2087 {
2088         if (tb[IFLA_ADDRESS] == NULL)
2089                 eth_hw_addr_random(dev);
2090
2091         return register_netdevice(dev);
2092 }
2093
2094 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
2095 {
2096         if (tb[IFLA_ADDRESS]) {
2097                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2098                         return -EINVAL;
2099                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2100                         return -EADDRNOTAVAIL;
2101         }
2102         return 0;
2103 }
2104
2105 static unsigned int team_get_num_tx_queues(void)
2106 {
2107         return TEAM_DEFAULT_NUM_TX_QUEUES;
2108 }
2109
2110 static unsigned int team_get_num_rx_queues(void)
2111 {
2112         return TEAM_DEFAULT_NUM_RX_QUEUES;
2113 }
2114
2115 static struct rtnl_link_ops team_link_ops __read_mostly = {
2116         .kind                   = DRV_NAME,
2117         .priv_size              = sizeof(struct team),
2118         .setup                  = team_setup,
2119         .newlink                = team_newlink,
2120         .validate               = team_validate,
2121         .get_num_tx_queues      = team_get_num_tx_queues,
2122         .get_num_rx_queues      = team_get_num_rx_queues,
2123 };
2124
2125
2126 /***********************************
2127  * Generic netlink custom interface
2128  ***********************************/
2129
2130 static struct genl_family team_nl_family = {
2131         .id             = GENL_ID_GENERATE,
2132         .name           = TEAM_GENL_NAME,
2133         .version        = TEAM_GENL_VERSION,
2134         .maxattr        = TEAM_ATTR_MAX,
2135         .netnsok        = true,
2136 };
2137
2138 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2139         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
2140         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
2141         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
2142         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
2143 };
2144
2145 static const struct nla_policy
2146 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2147         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
2148         [TEAM_ATTR_OPTION_NAME] = {
2149                 .type = NLA_STRING,
2150                 .len = TEAM_STRING_MAX_LEN,
2151         },
2152         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
2153         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
2154         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
2155 };
2156
2157 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2158 {
2159         struct sk_buff *msg;
2160         void *hdr;
2161         int err;
2162
2163         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2164         if (!msg)
2165                 return -ENOMEM;
2166
2167         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2168                           &team_nl_family, 0, TEAM_CMD_NOOP);
2169         if (!hdr) {
2170                 err = -EMSGSIZE;
2171                 goto err_msg_put;
2172         }
2173
2174         genlmsg_end(msg, hdr);
2175
2176         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2177
2178 err_msg_put:
2179         nlmsg_free(msg);
2180
2181         return err;
2182 }
2183
2184 /*
2185  * Netlink cmd functions should be locked by following two functions.
2186  * Since dev gets held here, that ensures dev won't disappear in between.
2187  */
2188 static struct team *team_nl_team_get(struct genl_info *info)
2189 {
2190         struct net *net = genl_info_net(info);
2191         int ifindex;
2192         struct net_device *dev;
2193         struct team *team;
2194
2195         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2196                 return NULL;
2197
2198         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2199         dev = dev_get_by_index(net, ifindex);
2200         if (!dev || dev->netdev_ops != &team_netdev_ops) {
2201                 if (dev)
2202                         dev_put(dev);
2203                 return NULL;
2204         }
2205
2206         team = netdev_priv(dev);
2207         mutex_lock(&team->lock);
2208         return team;
2209 }
2210
2211 static void team_nl_team_put(struct team *team)
2212 {
2213         mutex_unlock(&team->lock);
2214         dev_put(team->dev);
2215 }
2216
2217 typedef int team_nl_send_func_t(struct sk_buff *skb,
2218                                 struct team *team, u32 portid);
2219
2220 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2221 {
2222         return genlmsg_unicast(dev_net(team->dev), skb, portid);
2223 }
2224
2225 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2226                                        struct team_option_inst *opt_inst)
2227 {
2228         struct nlattr *option_item;
2229         struct team_option *option = opt_inst->option;
2230         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2231         struct team_gsetter_ctx ctx;
2232         int err;
2233
2234         ctx.info = opt_inst_info;
2235         err = team_option_get(team, opt_inst, &ctx);
2236         if (err)
2237                 return err;
2238
2239         option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2240         if (!option_item)
2241                 return -EMSGSIZE;
2242
2243         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2244                 goto nest_cancel;
2245         if (opt_inst_info->port &&
2246             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2247                         opt_inst_info->port->dev->ifindex))
2248                 goto nest_cancel;
2249         if (opt_inst->option->array_size &&
2250             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2251                         opt_inst_info->array_index))
2252                 goto nest_cancel;
2253
2254         switch (option->type) {
2255         case TEAM_OPTION_TYPE_U32:
2256                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2257                         goto nest_cancel;
2258                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2259                         goto nest_cancel;
2260                 break;
2261         case TEAM_OPTION_TYPE_STRING:
2262                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2263                         goto nest_cancel;
2264                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2265                                    ctx.data.str_val))
2266                         goto nest_cancel;
2267                 break;
2268         case TEAM_OPTION_TYPE_BINARY:
2269                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2270                         goto nest_cancel;
2271                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2272                             ctx.data.bin_val.ptr))
2273                         goto nest_cancel;
2274                 break;
2275         case TEAM_OPTION_TYPE_BOOL:
2276                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2277                         goto nest_cancel;
2278                 if (ctx.data.bool_val &&
2279                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2280                         goto nest_cancel;
2281                 break;
2282         case TEAM_OPTION_TYPE_S32:
2283                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2284                         goto nest_cancel;
2285                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2286                         goto nest_cancel;
2287                 break;
2288         default:
2289                 BUG();
2290         }
2291         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2292                 goto nest_cancel;
2293         if (opt_inst->changed) {
2294                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2295                         goto nest_cancel;
2296                 opt_inst->changed = false;
2297         }
2298         nla_nest_end(skb, option_item);
2299         return 0;
2300
2301 nest_cancel:
2302         nla_nest_cancel(skb, option_item);
2303         return -EMSGSIZE;
2304 }
2305
2306 static int __send_and_alloc_skb(struct sk_buff **pskb,
2307                                 struct team *team, u32 portid,
2308                                 team_nl_send_func_t *send_func)
2309 {
2310         int err;
2311
2312         if (*pskb) {
2313                 err = send_func(*pskb, team, portid);
2314                 if (err)
2315                         return err;
2316         }
2317         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2318         if (!*pskb)
2319                 return -ENOMEM;
2320         return 0;
2321 }
2322
2323 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2324                                     int flags, team_nl_send_func_t *send_func,
2325                                     struct list_head *sel_opt_inst_list)
2326 {
2327         struct nlattr *option_list;
2328         struct nlmsghdr *nlh;
2329         void *hdr;
2330         struct team_option_inst *opt_inst;
2331         int err;
2332         struct sk_buff *skb = NULL;
2333         bool incomplete;
2334         int i;
2335
2336         opt_inst = list_first_entry(sel_opt_inst_list,
2337                                     struct team_option_inst, tmp_list);
2338
2339 start_again:
2340         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2341         if (err)
2342                 return err;
2343
2344         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2345                           TEAM_CMD_OPTIONS_GET);
2346         if (!hdr)
2347                 return -EMSGSIZE;
2348
2349         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2350                 goto nla_put_failure;
2351         option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2352         if (!option_list)
2353                 goto nla_put_failure;
2354
2355         i = 0;
2356         incomplete = false;
2357         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2358                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2359                 if (err) {
2360                         if (err == -EMSGSIZE) {
2361                                 if (!i)
2362                                         goto errout;
2363                                 incomplete = true;
2364                                 break;
2365                         }
2366                         goto errout;
2367                 }
2368                 i++;
2369         }
2370
2371         nla_nest_end(skb, option_list);
2372         genlmsg_end(skb, hdr);
2373         if (incomplete)
2374                 goto start_again;
2375
2376 send_done:
2377         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2378         if (!nlh) {
2379                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2380                 if (err)
2381                         goto errout;
2382                 goto send_done;
2383         }
2384
2385         return send_func(skb, team, portid);
2386
2387 nla_put_failure:
2388         err = -EMSGSIZE;
2389 errout:
2390         genlmsg_cancel(skb, hdr);
2391         nlmsg_free(skb);
2392         return err;
2393 }
2394
2395 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2396 {
2397         struct team *team;
2398         struct team_option_inst *opt_inst;
2399         int err;
2400         LIST_HEAD(sel_opt_inst_list);
2401
2402         team = team_nl_team_get(info);
2403         if (!team)
2404                 return -EINVAL;
2405
2406         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2407                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2408         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2409                                        NLM_F_ACK, team_nl_send_unicast,
2410                                        &sel_opt_inst_list);
2411
2412         team_nl_team_put(team);
2413
2414         return err;
2415 }
2416
2417 static int team_nl_send_event_options_get(struct team *team,
2418                                           struct list_head *sel_opt_inst_list);
2419
2420 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2421 {
2422         struct team *team;
2423         int err = 0;
2424         int i;
2425         struct nlattr *nl_option;
2426         LIST_HEAD(opt_inst_list);
2427
2428         team = team_nl_team_get(info);
2429         if (!team)
2430                 return -EINVAL;
2431
2432         err = -EINVAL;
2433         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2434                 err = -EINVAL;
2435                 goto team_put;
2436         }
2437
2438         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2439                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2440                 struct nlattr *attr;
2441                 struct nlattr *attr_data;
2442                 enum team_option_type opt_type;
2443                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2444                 u32 opt_array_index = 0;
2445                 bool opt_is_array = false;
2446                 struct team_option_inst *opt_inst;
2447                 char *opt_name;
2448                 bool opt_found = false;
2449
2450                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2451                         err = -EINVAL;
2452                         goto team_put;
2453                 }
2454                 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2455                                        nl_option, team_nl_option_policy);
2456                 if (err)
2457                         goto team_put;
2458                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2459                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2460                         err = -EINVAL;
2461                         goto team_put;
2462                 }
2463                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2464                 case NLA_U32:
2465                         opt_type = TEAM_OPTION_TYPE_U32;
2466                         break;
2467                 case NLA_STRING:
2468                         opt_type = TEAM_OPTION_TYPE_STRING;
2469                         break;
2470                 case NLA_BINARY:
2471                         opt_type = TEAM_OPTION_TYPE_BINARY;
2472                         break;
2473                 case NLA_FLAG:
2474                         opt_type = TEAM_OPTION_TYPE_BOOL;
2475                         break;
2476                 case NLA_S32:
2477                         opt_type = TEAM_OPTION_TYPE_S32;
2478                         break;
2479                 default:
2480                         goto team_put;
2481                 }
2482
2483                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2484                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2485                         err = -EINVAL;
2486                         goto team_put;
2487                 }
2488
2489                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2490                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2491                 if (attr)
2492                         opt_port_ifindex = nla_get_u32(attr);
2493
2494                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2495                 if (attr) {
2496                         opt_is_array = true;
2497                         opt_array_index = nla_get_u32(attr);
2498                 }
2499
2500                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2501                         struct team_option *option = opt_inst->option;
2502                         struct team_gsetter_ctx ctx;
2503                         struct team_option_inst_info *opt_inst_info;
2504                         int tmp_ifindex;
2505
2506                         opt_inst_info = &opt_inst->info;
2507                         tmp_ifindex = opt_inst_info->port ?
2508                                       opt_inst_info->port->dev->ifindex : 0;
2509                         if (option->type != opt_type ||
2510                             strcmp(option->name, opt_name) ||
2511                             tmp_ifindex != opt_port_ifindex ||
2512                             (option->array_size && !opt_is_array) ||
2513                             opt_inst_info->array_index != opt_array_index)
2514                                 continue;
2515                         opt_found = true;
2516                         ctx.info = opt_inst_info;
2517                         switch (opt_type) {
2518                         case TEAM_OPTION_TYPE_U32:
2519                                 ctx.data.u32_val = nla_get_u32(attr_data);
2520                                 break;
2521                         case TEAM_OPTION_TYPE_STRING:
2522                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2523                                         err = -EINVAL;
2524                                         goto team_put;
2525                                 }
2526                                 ctx.data.str_val = nla_data(attr_data);
2527                                 break;
2528                         case TEAM_OPTION_TYPE_BINARY:
2529                                 ctx.data.bin_val.len = nla_len(attr_data);
2530                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2531                                 break;
2532                         case TEAM_OPTION_TYPE_BOOL:
2533                                 ctx.data.bool_val = attr_data ? true : false;
2534                                 break;
2535                         case TEAM_OPTION_TYPE_S32:
2536                                 ctx.data.s32_val = nla_get_s32(attr_data);
2537                                 break;
2538                         default:
2539                                 BUG();
2540                         }
2541                         err = team_option_set(team, opt_inst, &ctx);
2542                         if (err)
2543                                 goto team_put;
2544                         opt_inst->changed = true;
2545                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2546                 }
2547                 if (!opt_found) {
2548                         err = -ENOENT;
2549                         goto team_put;
2550                 }
2551         }
2552
2553         err = team_nl_send_event_options_get(team, &opt_inst_list);
2554
2555 team_put:
2556         team_nl_team_put(team);
2557
2558         return err;
2559 }
2560
2561 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2562                                      struct team_port *port)
2563 {
2564         struct nlattr *port_item;
2565
2566         port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2567         if (!port_item)
2568                 goto nest_cancel;
2569         if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2570                 goto nest_cancel;
2571         if (port->changed) {
2572                 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2573                         goto nest_cancel;
2574                 port->changed = false;
2575         }
2576         if ((port->removed &&
2577              nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2578             (port->state.linkup &&
2579              nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2580             nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2581             nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2582                 goto nest_cancel;
2583         nla_nest_end(skb, port_item);
2584         return 0;
2585
2586 nest_cancel:
2587         nla_nest_cancel(skb, port_item);
2588         return -EMSGSIZE;
2589 }
2590
2591 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2592                                       int flags, team_nl_send_func_t *send_func,
2593                                       struct team_port *one_port)
2594 {
2595         struct nlattr *port_list;
2596         struct nlmsghdr *nlh;
2597         void *hdr;
2598         struct team_port *port;
2599         int err;
2600         struct sk_buff *skb = NULL;
2601         bool incomplete;
2602         int i;
2603
2604         port = list_first_entry_or_null(&team->port_list,
2605                                         struct team_port, list);
2606
2607 start_again:
2608         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2609         if (err)
2610                 return err;
2611
2612         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2613                           TEAM_CMD_PORT_LIST_GET);
2614         if (!hdr)
2615                 return -EMSGSIZE;
2616
2617         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2618                 goto nla_put_failure;
2619         port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2620         if (!port_list)
2621                 goto nla_put_failure;
2622
2623         i = 0;
2624         incomplete = false;
2625
2626         /* If one port is selected, called wants to send port list containing
2627          * only this port. Otherwise go through all listed ports and send all
2628          */
2629         if (one_port) {
2630                 err = team_nl_fill_one_port_get(skb, one_port);
2631                 if (err)
2632                         goto errout;
2633         } else if (port) {
2634                 list_for_each_entry_from(port, &team->port_list, list) {
2635                         err = team_nl_fill_one_port_get(skb, port);
2636                         if (err) {
2637                                 if (err == -EMSGSIZE) {
2638                                         if (!i)
2639                                                 goto errout;
2640                                         incomplete = true;
2641                                         break;
2642                                 }
2643                                 goto errout;
2644                         }
2645                         i++;
2646                 }
2647         }
2648
2649         nla_nest_end(skb, port_list);
2650         genlmsg_end(skb, hdr);
2651         if (incomplete)
2652                 goto start_again;
2653
2654 send_done:
2655         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2656         if (!nlh) {
2657                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2658                 if (err)
2659                         goto errout;
2660                 goto send_done;
2661         }
2662
2663         return send_func(skb, team, portid);
2664
2665 nla_put_failure:
2666         err = -EMSGSIZE;
2667 errout:
2668         genlmsg_cancel(skb, hdr);
2669         nlmsg_free(skb);
2670         return err;
2671 }
2672
2673 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2674                                      struct genl_info *info)
2675 {
2676         struct team *team;
2677         int err;
2678
2679         team = team_nl_team_get(info);
2680         if (!team)
2681                 return -EINVAL;
2682
2683         err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2684                                          NLM_F_ACK, team_nl_send_unicast, NULL);
2685
2686         team_nl_team_put(team);
2687
2688         return err;
2689 }
2690
2691 static const struct genl_ops team_nl_ops[] = {
2692         {
2693                 .cmd = TEAM_CMD_NOOP,
2694                 .doit = team_nl_cmd_noop,
2695                 .policy = team_nl_policy,
2696         },
2697         {
2698                 .cmd = TEAM_CMD_OPTIONS_SET,
2699                 .doit = team_nl_cmd_options_set,
2700                 .policy = team_nl_policy,
2701                 .flags = GENL_ADMIN_PERM,
2702         },
2703         {
2704                 .cmd = TEAM_CMD_OPTIONS_GET,
2705                 .doit = team_nl_cmd_options_get,
2706                 .policy = team_nl_policy,
2707                 .flags = GENL_ADMIN_PERM,
2708         },
2709         {
2710                 .cmd = TEAM_CMD_PORT_LIST_GET,
2711                 .doit = team_nl_cmd_port_list_get,
2712                 .policy = team_nl_policy,
2713                 .flags = GENL_ADMIN_PERM,
2714         },
2715 };
2716
2717 static const struct genl_multicast_group team_nl_mcgrps[] = {
2718         { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2719 };
2720
2721 static int team_nl_send_multicast(struct sk_buff *skb,
2722                                   struct team *team, u32 portid)
2723 {
2724         return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2725                                        skb, 0, 0, GFP_KERNEL);
2726 }
2727
2728 static int team_nl_send_event_options_get(struct team *team,
2729                                           struct list_head *sel_opt_inst_list)
2730 {
2731         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2732                                         sel_opt_inst_list);
2733 }
2734
2735 static int team_nl_send_event_port_get(struct team *team,
2736                                        struct team_port *port)
2737 {
2738         return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2739                                           port);
2740 }
2741
2742 static int team_nl_init(void)
2743 {
2744         return genl_register_family_with_ops_groups(&team_nl_family, team_nl_ops,
2745                                                     team_nl_mcgrps);
2746 }
2747
2748 static void team_nl_fini(void)
2749 {
2750         genl_unregister_family(&team_nl_family);
2751 }
2752
2753
2754 /******************
2755  * Change checkers
2756  ******************/
2757
2758 static void __team_options_change_check(struct team *team)
2759 {
2760         int err;
2761         struct team_option_inst *opt_inst;
2762         LIST_HEAD(sel_opt_inst_list);
2763
2764         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2765                 if (opt_inst->changed)
2766                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2767         }
2768         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2769         if (err && err != -ESRCH)
2770                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2771                             err);
2772 }
2773
2774 /* rtnl lock is held */
2775
2776 static void __team_port_change_send(struct team_port *port, bool linkup)
2777 {
2778         int err;
2779
2780         port->changed = true;
2781         port->state.linkup = linkup;
2782         team_refresh_port_linkup(port);
2783         if (linkup) {
2784                 struct ethtool_cmd ecmd;
2785
2786                 err = __ethtool_get_settings(port->dev, &ecmd);
2787                 if (!err) {
2788                         port->state.speed = ethtool_cmd_speed(&ecmd);
2789                         port->state.duplex = ecmd.duplex;
2790                         goto send_event;
2791                 }
2792         }
2793         port->state.speed = 0;
2794         port->state.duplex = 0;
2795
2796 send_event:
2797         err = team_nl_send_event_port_get(port->team, port);
2798         if (err && err != -ESRCH)
2799                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2800                             port->dev->name, err);
2801
2802 }
2803
2804 static void __team_carrier_check(struct team *team)
2805 {
2806         struct team_port *port;
2807         bool team_linkup;
2808
2809         if (team->user_carrier_enabled)
2810                 return;
2811
2812         team_linkup = false;
2813         list_for_each_entry(port, &team->port_list, list) {
2814                 if (port->linkup) {
2815                         team_linkup = true;
2816                         break;
2817                 }
2818         }
2819
2820         if (team_linkup)
2821                 netif_carrier_on(team->dev);
2822         else
2823                 netif_carrier_off(team->dev);
2824 }
2825
2826 static void __team_port_change_check(struct team_port *port, bool linkup)
2827 {
2828         if (port->state.linkup != linkup)
2829                 __team_port_change_send(port, linkup);
2830         __team_carrier_check(port->team);
2831 }
2832
2833 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2834 {
2835         __team_port_change_send(port, linkup);
2836         __team_carrier_check(port->team);
2837 }
2838
2839 static void __team_port_change_port_removed(struct team_port *port)
2840 {
2841         port->removed = true;
2842         __team_port_change_send(port, false);
2843         __team_carrier_check(port->team);
2844 }
2845
2846 static void team_port_change_check(struct team_port *port, bool linkup)
2847 {
2848         struct team *team = port->team;
2849
2850         mutex_lock(&team->lock);
2851         __team_port_change_check(port, linkup);
2852         mutex_unlock(&team->lock);
2853 }
2854
2855
2856 /************************************
2857  * Net device notifier event handler
2858  ************************************/
2859
2860 static int team_device_event(struct notifier_block *unused,
2861                              unsigned long event, void *ptr)
2862 {
2863         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2864         struct team_port *port;
2865
2866         port = team_port_get_rtnl(dev);
2867         if (!port)
2868                 return NOTIFY_DONE;
2869
2870         switch (event) {
2871         case NETDEV_UP:
2872                 if (netif_carrier_ok(dev))
2873                         team_port_change_check(port, true);
2874                 break;
2875         case NETDEV_DOWN:
2876                 team_port_change_check(port, false);
2877                 break;
2878         case NETDEV_CHANGE:
2879                 if (netif_running(port->dev))
2880                         team_port_change_check(port,
2881                                                !!netif_carrier_ok(port->dev));
2882                 break;
2883         case NETDEV_UNREGISTER:
2884                 team_del_slave(port->team->dev, dev);
2885                 break;
2886         case NETDEV_FEAT_CHANGE:
2887                 team_compute_features(port->team);
2888                 break;
2889         case NETDEV_PRECHANGEMTU:
2890                 /* Forbid to change mtu of underlaying device */
2891                 if (!port->team->port_mtu_change_allowed)
2892                         return NOTIFY_BAD;
2893                 break;
2894         case NETDEV_PRE_TYPE_CHANGE:
2895                 /* Forbid to change type of underlaying device */
2896                 return NOTIFY_BAD;
2897         case NETDEV_RESEND_IGMP:
2898                 /* Propagate to master device */
2899                 call_netdevice_notifiers(event, port->team->dev);
2900                 break;
2901         }
2902         return NOTIFY_DONE;
2903 }
2904
2905 static struct notifier_block team_notifier_block __read_mostly = {
2906         .notifier_call = team_device_event,
2907 };
2908
2909
2910 /***********************
2911  * Module init and exit
2912  ***********************/
2913
2914 static int __init team_module_init(void)
2915 {
2916         int err;
2917
2918         register_netdevice_notifier(&team_notifier_block);
2919
2920         err = rtnl_link_register(&team_link_ops);
2921         if (err)
2922                 goto err_rtnl_reg;
2923
2924         err = team_nl_init();
2925         if (err)
2926                 goto err_nl_init;
2927
2928         return 0;
2929
2930 err_nl_init:
2931         rtnl_link_unregister(&team_link_ops);
2932
2933 err_rtnl_reg:
2934         unregister_netdevice_notifier(&team_notifier_block);
2935
2936         return err;
2937 }
2938
2939 static void __exit team_module_exit(void)
2940 {
2941         team_nl_fini();
2942         rtnl_link_unregister(&team_link_ops);
2943         unregister_netdevice_notifier(&team_notifier_block);
2944 }
2945
2946 module_init(team_module_init);
2947 module_exit(team_module_exit);
2948
2949 MODULE_LICENSE("GPL v2");
2950 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2951 MODULE_DESCRIPTION("Ethernet team device driver");
2952 MODULE_ALIAS_RTNL_LINK(DRV_NAME);