drivers/net/team/team.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * drivers/net/team/team.c - Network team device driver
   4  * Copyright (c) 2011 Jiri Pirko <[email protected]>
   5  */
   6
   7 #include <linux/ethtool.h>
   8 #include <linux/kernel.h>
   9 #include <linux/types.h>
  10 #include <linux/module.h>
  11 #include <linux/init.h>
  12 #include <linux/slab.h>
  13 #include <linux/rcupdate.h>
  14 #include <linux/errno.h>
  15 #include <linux/ctype.h>
  16 #include <linux/notifier.h>
  17 #include <linux/netdevice.h>
  18 #include <linux/netpoll.h>
  19 #include <linux/if_vlan.h>
  20 #include <linux/if_arp.h>
  21 #include <linux/socket.h>
  22 #include <linux/etherdevice.h>
  23 #include <linux/rtnetlink.h>
  24 #include <net/rtnetlink.h>
  25 #include <net/genetlink.h>
  26 #include <net/netlink.h>
  27 #include <net/sch_generic.h>
  28 #include <generated/utsrelease.h>
  29 #include <linux/if_team.h>
  30
  31 #define DRV_NAME "team"
  32
  33
  34 /**********
  35  * Helpers
  36  **********/
  37
  38 static struct team_port *team_port_get_rtnl(const struct net_device *dev)
  39 {
  40         struct team_port *port = rtnl_dereference(dev->rx_handler_data);
  41
  42         return netif_is_team_port(dev) ? port : NULL;
  43 }
  44
  45 /*
  46  * Since the ability to change device address for open port device is tested in
  47  * team_port_add, this function can be called without control of return value
  48  */
  49 static int __set_port_dev_addr(struct net_device *port_dev,
  50                                const unsigned char *dev_addr)
  51 {
  52         struct sockaddr_storage addr;
  53
  54         memcpy(addr.__data, dev_addr, port_dev->addr_len);
  55         addr.ss_family = port_dev->type;
  56         return dev_set_mac_address(port_dev, (struct sockaddr *)&addr, NULL);
  57 }
  58
  59 static int team_port_set_orig_dev_addr(struct team_port *port)
  60 {
  61         return __set_port_dev_addr(port->dev, port->orig.dev_addr);
  62 }
  63
  64 static int team_port_set_team_dev_addr(struct team *team,
  65                                        struct team_port *port)
  66 {
  67         return __set_port_dev_addr(port->dev, team->dev->dev_addr);
  68 }
  69
  70 int team_modeop_port_enter(struct team *team, struct team_port *port)
  71 {
  72         return team_port_set_team_dev_addr(team, port);
  73 }
  74 EXPORT_SYMBOL(team_modeop_port_enter);
  75
  76 void team_modeop_port_change_dev_addr(struct team *team,
  77                                       struct team_port *port)
  78 {
  79         team_port_set_team_dev_addr(team, port);
  80 }
  81 EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
  82
  83 static void team_lower_state_changed(struct team_port *port)
  84 {
  85         struct netdev_lag_lower_state_info info;
  86
  87         info.link_up = port->linkup;
  88         info.tx_enabled = team_port_enabled(port);
  89         netdev_lower_state_changed(port->dev, &info);
  90 }
  91
  92 static void team_refresh_port_linkup(struct team_port *port)
  93 {
  94         bool new_linkup = port->user.linkup_enabled ? port->user.linkup :
  95                                                       port->state.linkup;
  96
  97         if (port->linkup != new_linkup) {
  98                 port->linkup = new_linkup;
  99                 team_lower_state_changed(port);
 100         }
 101 }
 102
 103
 104 /*******************
 105  * Options handling
 106  *******************/
 107
 108 struct team_option_inst { /* One for each option instance */
 109         struct list_head list;
 110         struct list_head tmp_list;
 111         struct team_option *option;
 112         struct team_option_inst_info info;
 113         bool changed;
 114         bool removed;
 115 };
 116
 117 static struct team_option *__team_find_option(struct team *team,
 118                                               const char *opt_name)
 119 {
 120         struct team_option *option;
 121
 122         list_for_each_entry(option, &team->option_list, list) {
 123                 if (strcmp(option->name, opt_name) == 0)
 124                         return option;
 125         }
 126         return NULL;
 127 }
 128
 129 static void __team_option_inst_del(struct team_option_inst *opt_inst)
 130 {
 131         list_del(&opt_inst->list);
 132         kfree(opt_inst);
 133 }
 134
 135 static void __team_option_inst_del_option(struct team *team,
 136                                           struct team_option *option)
 137 {
 138         struct team_option_inst *opt_inst, *tmp;
 139
 140         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 141                 if (opt_inst->option == option)
 142                         __team_option_inst_del(opt_inst);
 143         }
 144 }
 145
 146 static int __team_option_inst_add(struct team *team, struct team_option *option,
 147                                   struct team_port *port)
 148 {
 149         struct team_option_inst *opt_inst;
 150         unsigned int array_size;
 151         unsigned int i;
 152
 153         array_size = option->array_size;
 154         if (!array_size)
 155                 array_size = 1; /* No array but still need one instance */
 156
 157         for (i = 0; i < array_size; i++) {
 158                 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
 159                 if (!opt_inst)
 160                         return -ENOMEM;
 161                 opt_inst->option = option;
 162                 opt_inst->info.port = port;
 163                 opt_inst->info.array_index = i;
 164                 opt_inst->changed = true;
 165                 opt_inst->removed = false;
 166                 list_add_tail(&opt_inst->list, &team->option_inst_list);
 167                 if (option->init)
 168                         option->init(team, &opt_inst->info);
 169
 170         }
 171         return 0;
 172 }
 173
 174 static int __team_option_inst_add_option(struct team *team,
 175                                          struct team_option *option)
 176 {
 177         int err;
 178
 179         if (!option->per_port) {
 180                 err = __team_option_inst_add(team, option, NULL);
 181                 if (err)
 182                         goto inst_del_option;
 183         }
 184         return 0;
 185
 186 inst_del_option:
 187         __team_option_inst_del_option(team, option);
 188         return err;
 189 }
 190
 191 static void __team_option_inst_mark_removed_option(struct team *team,
 192                                                    struct team_option *option)
 193 {
 194         struct team_option_inst *opt_inst;
 195
 196         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 197                 if (opt_inst->option == option) {
 198                         opt_inst->changed = true;
 199                         opt_inst->removed = true;
 200                 }
 201         }
 202 }
 203
 204 static void __team_option_inst_del_port(struct team *team,
 205                                         struct team_port *port)
 206 {
 207         struct team_option_inst *opt_inst, *tmp;
 208
 209         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 210                 if (opt_inst->option->per_port &&
 211                     opt_inst->info.port == port)
 212                         __team_option_inst_del(opt_inst);
 213         }
 214 }
 215
 216 static int __team_option_inst_add_port(struct team *team,
 217                                        struct team_port *port)
 218 {
 219         struct team_option *option;
 220         int err;
 221
 222         list_for_each_entry(option, &team->option_list, list) {
 223                 if (!option->per_port)
 224                         continue;
 225                 err = __team_option_inst_add(team, option, port);
 226                 if (err)
 227                         goto inst_del_port;
 228         }
 229         return 0;
 230
 231 inst_del_port:
 232         __team_option_inst_del_port(team, port);
 233         return err;
 234 }
 235
 236 static void __team_option_inst_mark_removed_port(struct team *team,
 237                                                  struct team_port *port)
 238 {
 239         struct team_option_inst *opt_inst;
 240
 241         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 242                 if (opt_inst->info.port == port) {
 243                         opt_inst->changed = true;
 244                         opt_inst->removed = true;
 245                 }
 246         }
 247 }
 248
 249 static int __team_options_register(struct team *team,
 250                                    const struct team_option *option,
 251                                    size_t option_count)
 252 {
 253         int i;
 254         struct team_option **dst_opts;
 255         int err;
 256
 257         dst_opts = kcalloc(option_count, sizeof(struct team_option *),
 258                            GFP_KERNEL);
 259         if (!dst_opts)
 260                 return -ENOMEM;
 261         for (i = 0; i < option_count; i++, option++) {
 262                 if (__team_find_option(team, option->name)) {
 263                         err = -EEXIST;
 264                         goto alloc_rollback;
 265                 }
 266                 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
 267                 if (!dst_opts[i]) {
 268                         err = -ENOMEM;
 269                         goto alloc_rollback;
 270                 }
 271         }
 272
 273         for (i = 0; i < option_count; i++) {
 274                 err = __team_option_inst_add_option(team, dst_opts[i]);
 275                 if (err)
 276                         goto inst_rollback;
 277                 list_add_tail(&dst_opts[i]->list, &team->option_list);
 278         }
 279
 280         kfree(dst_opts);
 281         return 0;
 282
 283 inst_rollback:
 284         for (i--; i >= 0; i--)
 285                 __team_option_inst_del_option(team, dst_opts[i]);
 286
 287         i = option_count;
 288 alloc_rollback:
 289         for (i--; i >= 0; i--)
 290                 kfree(dst_opts[i]);
 291
 292         kfree(dst_opts);
 293         return err;
 294 }
 295
 296 static void __team_options_mark_removed(struct team *team,
 297                                         const struct team_option *option,
 298                                         size_t option_count)
 299 {
 300         int i;
 301
 302         for (i = 0; i < option_count; i++, option++) {
 303                 struct team_option *del_opt;
 304
 305                 del_opt = __team_find_option(team, option->name);
 306                 if (del_opt)
 307                         __team_option_inst_mark_removed_option(team, del_opt);
 308         }
 309 }
 310
 311 static void __team_options_unregister(struct team *team,
 312                                       const struct team_option *option,
 313                                       size_t option_count)
 314 {
 315         int i;
 316
 317         for (i = 0; i < option_count; i++, option++) {
 318                 struct team_option *del_opt;
 319
 320                 del_opt = __team_find_option(team, option->name);
 321                 if (del_opt) {
 322                         __team_option_inst_del_option(team, del_opt);
 323                         list_del(&del_opt->list);
 324                         kfree(del_opt);
 325                 }
 326         }
 327 }
 328
 329 static void __team_options_change_check(struct team *team);
 330
 331 int team_options_register(struct team *team,
 332                           const struct team_option *option,
 333                           size_t option_count)
 334 {
 335         int err;
 336
 337         err = __team_options_register(team, option, option_count);
 338         if (err)
 339                 return err;
 340         __team_options_change_check(team);
 341         return 0;
 342 }
 343 EXPORT_SYMBOL(team_options_register);
 344
 345 void team_options_unregister(struct team *team,
 346                              const struct team_option *option,
 347                              size_t option_count)
 348 {
 349         __team_options_mark_removed(team, option, option_count);
 350         __team_options_change_check(team);
 351         __team_options_unregister(team, option, option_count);
 352 }
 353 EXPORT_SYMBOL(team_options_unregister);
 354
 355 static int team_option_get(struct team *team,
 356                            struct team_option_inst *opt_inst,
 357                            struct team_gsetter_ctx *ctx)
 358 {
 359         if (!opt_inst->option->getter)
 360                 return -EOPNOTSUPP;
 361
 362         opt_inst->option->getter(team, ctx);
 363         return 0;
 364 }
 365
 366 static int team_option_set(struct team *team,
 367                            struct team_option_inst *opt_inst,
 368                            struct team_gsetter_ctx *ctx)
 369 {
 370         if (!opt_inst->option->setter)
 371                 return -EOPNOTSUPP;
 372         return opt_inst->option->setter(team, ctx);
 373 }
 374
 375 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
 376 {
 377         struct team_option_inst *opt_inst;
 378
 379         opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
 380         opt_inst->changed = true;
 381 }
 382 EXPORT_SYMBOL(team_option_inst_set_change);
 383
 384 void team_options_change_check(struct team *team)
 385 {
 386         __team_options_change_check(team);
 387 }
 388 EXPORT_SYMBOL(team_options_change_check);
 389
 390
 391 /****************
 392  * Mode handling
 393  ****************/
 394
 395 static LIST_HEAD(mode_list);
 396 static DEFINE_SPINLOCK(mode_list_lock);
 397
 398 struct team_mode_item {
 399         struct list_head list;
 400         const struct team_mode *mode;
 401 };
 402
 403 static struct team_mode_item *__find_mode(const char *kind)
 404 {
 405         struct team_mode_item *mitem;
 406
 407         list_for_each_entry(mitem, &mode_list, list) {
 408                 if (strcmp(mitem->mode->kind, kind) == 0)
 409                         return mitem;
 410         }
 411         return NULL;
 412 }
 413
 414 static bool is_good_mode_name(const char *name)
 415 {
 416         while (*name != '\0') {
 417                 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
 418                         return false;
 419                 name++;
 420         }
 421         return true;
 422 }
 423
 424 int team_mode_register(const struct team_mode *mode)
 425 {
 426         int err = 0;
 427         struct team_mode_item *mitem;
 428
 429         if (!is_good_mode_name(mode->kind) ||
 430             mode->priv_size > TEAM_MODE_PRIV_SIZE)
 431                 return -EINVAL;
 432
 433         mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
 434         if (!mitem)
 435                 return -ENOMEM;
 436
 437         spin_lock(&mode_list_lock);
 438         if (__find_mode(mode->kind)) {
 439                 err = -EEXIST;
 440                 kfree(mitem);
 441                 goto unlock;
 442         }
 443         mitem->mode = mode;
 444         list_add_tail(&mitem->list, &mode_list);
 445 unlock:
 446         spin_unlock(&mode_list_lock);
 447         return err;
 448 }
 449 EXPORT_SYMBOL(team_mode_register);
 450
 451 void team_mode_unregister(const struct team_mode *mode)
 452 {
 453         struct team_mode_item *mitem;
 454
 455         spin_lock(&mode_list_lock);
 456         mitem = __find_mode(mode->kind);
 457         if (mitem) {
 458                 list_del_init(&mitem->list);
 459                 kfree(mitem);
 460         }
 461         spin_unlock(&mode_list_lock);
 462 }
 463 EXPORT_SYMBOL(team_mode_unregister);
 464
 465 static const struct team_mode *team_mode_get(const char *kind)
 466 {
 467         struct team_mode_item *mitem;
 468         const struct team_mode *mode = NULL;
 469
 470         if (!try_module_get(THIS_MODULE))
 471                 return NULL;
 472
 473         spin_lock(&mode_list_lock);
 474         mitem = __find_mode(kind);
 475         if (!mitem) {
 476                 spin_unlock(&mode_list_lock);
 477                 request_module("team-mode-%s", kind);
 478                 spin_lock(&mode_list_lock);
 479                 mitem = __find_mode(kind);
 480         }
 481         if (mitem) {
 482                 mode = mitem->mode;
 483                 if (!try_module_get(mode->owner))
 484                         mode = NULL;
 485         }
 486
 487         spin_unlock(&mode_list_lock);
 488         module_put(THIS_MODULE);
 489         return mode;
 490 }
 491
 492 static void team_mode_put(const struct team_mode *mode)
 493 {
 494         module_put(mode->owner);
 495 }
 496
 497 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
 498 {
 499         dev_kfree_skb_any(skb);
 500         return false;
 501 }
 502
 503 static rx_handler_result_t team_dummy_receive(struct team *team,
 504                                               struct team_port *port,
 505                                               struct sk_buff *skb)
 506 {
 507         return RX_HANDLER_ANOTHER;
 508 }
 509
 510 static const struct team_mode __team_no_mode = {
 511         .kind           = "*NOMODE*",
 512 };
 513
 514 static bool team_is_mode_set(struct team *team)
 515 {
 516         return team->mode != &__team_no_mode;
 517 }
 518
 519 static void team_set_no_mode(struct team *team)
 520 {
 521         team->user_carrier_enabled = false;
 522         team->mode = &__team_no_mode;
 523 }
 524
 525 static void team_adjust_ops(struct team *team)
 526 {
 527         /*
 528          * To avoid checks in rx/tx skb paths, ensure here that non-null and
 529          * correct ops are always set.
 530          */
 531
 532         if (!team->en_port_count || !team_is_mode_set(team) ||
 533             !team->mode->ops->transmit)
 534                 team->ops.transmit = team_dummy_transmit;
 535         else
 536                 team->ops.transmit = team->mode->ops->transmit;
 537
 538         if (!team->en_port_count || !team_is_mode_set(team) ||
 539             !team->mode->ops->receive)
 540                 team->ops.receive = team_dummy_receive;
 541         else
 542                 team->ops.receive = team->mode->ops->receive;
 543 }
 544
 545 /*
 546  * We can benefit from the fact that it's ensured no port is present
 547  * at the time of mode change. Therefore no packets are in fly so there's no
 548  * need to set mode operations in any special way.
 549  */
 550 static int __team_change_mode(struct team *team,
 551                               const struct team_mode *new_mode)
 552 {
 553         /* Check if mode was previously set and do cleanup if so */
 554         if (team_is_mode_set(team)) {
 555                 void (*exit_op)(struct team *team) = team->ops.exit;
 556
 557                 /* Clear ops area so no callback is called any longer */
 558                 memset(&team->ops, 0, sizeof(struct team_mode_ops));
 559                 team_adjust_ops(team);
 560
 561                 if (exit_op)
 562                         exit_op(team);
 563                 team_mode_put(team->mode);
 564                 team_set_no_mode(team);
 565                 /* zero private data area */
 566                 memset(&team->mode_priv, 0,
 567                        sizeof(struct team) - offsetof(struct team, mode_priv));
 568         }
 569
 570         if (!new_mode)
 571                 return 0;
 572
 573         if (new_mode->ops->init) {
 574                 int err;
 575
 576                 err = new_mode->ops->init(team);
 577                 if (err)
 578                         return err;
 579         }
 580
 581         team->mode = new_mode;
 582         memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
 583         team_adjust_ops(team);
 584
 585         return 0;
 586 }
 587
 588 static int team_change_mode(struct team *team, const char *kind)
 589 {
 590         const struct team_mode *new_mode;
 591         struct net_device *dev = team->dev;
 592         int err;
 593
 594         if (!list_empty(&team->port_list)) {
 595                 netdev_err(dev, "No ports can be present during mode change\n");
 596                 return -EBUSY;
 597         }
 598
 599         if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
 600                 netdev_err(dev, "Unable to change to the same mode the team is in\n");
 601                 return -EINVAL;
 602         }
 603
 604         new_mode = team_mode_get(kind);
 605         if (!new_mode) {
 606                 netdev_err(dev, "Mode \"%s\" not found\n", kind);
 607                 return -EINVAL;
 608         }
 609
 610         err = __team_change_mode(team, new_mode);
 611         if (err) {
 612                 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
 613                 team_mode_put(new_mode);
 614                 return err;
 615         }
 616
 617         netdev_info(dev, "Mode changed to \"%s\"\n", kind);
 618         return 0;
 619 }
 620
 621
 622 /*********************
 623  * Peers notification
 624  *********************/
 625
 626 static void team_notify_peers_work(struct work_struct *work)
 627 {
 628         struct team *team;
 629         int val;
 630
 631         team = container_of(work, struct team, notify_peers.dw.work);
 632
 633         if (!rtnl_trylock()) {
 634                 schedule_delayed_work(&team->notify_peers.dw, 0);
 635                 return;
 636         }
 637         val = atomic_dec_if_positive(&team->notify_peers.count_pending);
 638         if (val < 0) {
 639                 rtnl_unlock();
 640                 return;
 641         }
 642         call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
 643         rtnl_unlock();
 644         if (val)
 645                 schedule_delayed_work(&team->notify_peers.dw,
 646                                       msecs_to_jiffies(team->notify_peers.interval));
 647 }
 648
 649 static void team_notify_peers(struct team *team)
 650 {
 651         if (!team->notify_peers.count || !netif_running(team->dev))
 652                 return;
 653         atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
 654         schedule_delayed_work(&team->notify_peers.dw, 0);
 655 }
 656
 657 static void team_notify_peers_init(struct team *team)
 658 {
 659         INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
 660 }
 661
 662 static void team_notify_peers_fini(struct team *team)
 663 {
 664         cancel_delayed_work_sync(&team->notify_peers.dw);
 665 }
 666
 667
 668 /*******************************
 669  * Send multicast group rejoins
 670  *******************************/
 671
 672 static void team_mcast_rejoin_work(struct work_struct *work)
 673 {
 674         struct team *team;
 675         int val;
 676
 677         team = container_of(work, struct team, mcast_rejoin.dw.work);
 678
 679         if (!rtnl_trylock()) {
 680                 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 681                 return;
 682         }
 683         val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending);
 684         if (val < 0) {
 685                 rtnl_unlock();
 686                 return;
 687         }
 688         call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
 689         rtnl_unlock();
 690         if (val)
 691                 schedule_delayed_work(&team->mcast_rejoin.dw,
 692                                       msecs_to_jiffies(team->mcast_rejoin.interval));
 693 }
 694
 695 static void team_mcast_rejoin(struct team *team)
 696 {
 697         if (!team->mcast_rejoin.count || !netif_running(team->dev))
 698                 return;
 699         atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
 700         schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 701 }
 702
 703 static void team_mcast_rejoin_init(struct team *team)
 704 {
 705         INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
 706 }
 707
 708 static void team_mcast_rejoin_fini(struct team *team)
 709 {
 710         cancel_delayed_work_sync(&team->mcast_rejoin.dw);
 711 }
 712
 713
 714 /************************
 715  * Rx path frame handler
 716  ************************/
 717
 718 /* note: already called with rcu_read_lock */
 719 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
 720 {
 721         struct sk_buff *skb = *pskb;
 722         struct team_port *port;
 723         struct team *team;
 724         rx_handler_result_t res;
 725
 726         skb = skb_share_check(skb, GFP_ATOMIC);
 727         if (!skb)
 728                 return RX_HANDLER_CONSUMED;
 729
 730         *pskb = skb;
 731
 732         port = team_port_get_rcu(skb->dev);
 733         team = port->team;
 734         if (!team_port_enabled(port)) {
 735                 if (is_link_local_ether_addr(eth_hdr(skb)->h_dest))
 736                         /* link-local packets are mostly useful when stack receives them
 737                          * with the link they arrive on.
 738                          */
 739                         return RX_HANDLER_PASS;
 740                 /* allow exact match delivery for disabled ports */
 741                 res = RX_HANDLER_EXACT;
 742         } else {
 743                 res = team->ops.receive(team, port, skb);
 744         }
 745         if (res == RX_HANDLER_ANOTHER) {
 746                 struct team_pcpu_stats *pcpu_stats;
 747
 748                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
 749                 u64_stats_update_begin(&pcpu_stats->syncp);
 750                 u64_stats_inc(&pcpu_stats->rx_packets);
 751                 u64_stats_add(&pcpu_stats->rx_bytes, skb->len);
 752                 if (skb->pkt_type == PACKET_MULTICAST)
 753                         u64_stats_inc(&pcpu_stats->rx_multicast);
 754                 u64_stats_update_end(&pcpu_stats->syncp);
 755
 756                 skb->dev = team->dev;
 757         } else if (res == RX_HANDLER_EXACT) {
 758                 this_cpu_inc(team->pcpu_stats->rx_nohandler);
 759         } else {
 760                 this_cpu_inc(team->pcpu_stats->rx_dropped);
 761         }
 762
 763         return res;
 764 }
 765
 766
 767 /*************************************
 768  * Multiqueue Tx port select override
 769  *************************************/
 770
 771 static int team_queue_override_init(struct team *team)
 772 {
 773         struct list_head *listarr;
 774         unsigned int queue_cnt = team->dev->num_tx_queues - 1;
 775         unsigned int i;
 776
 777         if (!queue_cnt)
 778                 return 0;
 779         listarr = kmalloc_array(queue_cnt, sizeof(struct list_head),
 780                                 GFP_KERNEL);
 781         if (!listarr)
 782                 return -ENOMEM;
 783         team->qom_lists = listarr;
 784         for (i = 0; i < queue_cnt; i++)
 785                 INIT_LIST_HEAD(listarr++);
 786         return 0;
 787 }
 788
 789 static void team_queue_override_fini(struct team *team)
 790 {
 791         kfree(team->qom_lists);
 792 }
 793
 794 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
 795 {
 796         return &team->qom_lists[queue_id - 1];
 797 }
 798
 799 /*
 800  * note: already called with rcu_read_lock
 801  */
 802 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
 803 {
 804         struct list_head *qom_list;
 805         struct team_port *port;
 806
 807         if (!team->queue_override_enabled || !skb->queue_mapping)
 808                 return false;
 809         qom_list = __team_get_qom_list(team, skb->queue_mapping);
 810         list_for_each_entry_rcu(port, qom_list, qom_list) {
 811                 if (!team_dev_queue_xmit(team, port, skb))
 812                         return true;
 813         }
 814         return false;
 815 }
 816
 817 static void __team_queue_override_port_del(struct team *team,
 818                                            struct team_port *port)
 819 {
 820         if (!port->queue_id)
 821                 return;
 822         list_del_rcu(&port->qom_list);
 823 }
 824
 825 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
 826                                                       struct team_port *cur)
 827 {
 828         if (port->priority < cur->priority)
 829                 return true;
 830         if (port->priority > cur->priority)
 831                 return false;
 832         if (port->index < cur->index)
 833                 return true;
 834         return false;
 835 }
 836
 837 static void __team_queue_override_port_add(struct team *team,
 838                                            struct team_port *port)
 839 {
 840         struct team_port *cur;
 841         struct list_head *qom_list;
 842         struct list_head *node;
 843
 844         if (!port->queue_id)
 845                 return;
 846         qom_list = __team_get_qom_list(team, port->queue_id);
 847         node = qom_list;
 848         list_for_each_entry(cur, qom_list, qom_list) {
 849                 if (team_queue_override_port_has_gt_prio_than(port, cur))
 850                         break;
 851                 node = &cur->qom_list;
 852         }
 853         list_add_tail_rcu(&port->qom_list, node);
 854 }
 855
 856 static void __team_queue_override_enabled_check(struct team *team)
 857 {
 858         struct team_port *port;
 859         bool enabled = false;
 860
 861         list_for_each_entry(port, &team->port_list, list) {
 862                 if (port->queue_id) {
 863                         enabled = true;
 864                         break;
 865                 }
 866         }
 867         if (enabled == team->queue_override_enabled)
 868                 return;
 869         netdev_dbg(team->dev, "%s queue override\n",
 870                    enabled ? "Enabling" : "Disabling");
 871         team->queue_override_enabled = enabled;
 872 }
 873
 874 static void team_queue_override_port_prio_changed(struct team *team,
 875                                                   struct team_port *port)
 876 {
 877         if (!port->queue_id || team_port_enabled(port))
 878                 return;
 879         __team_queue_override_port_del(team, port);
 880         __team_queue_override_port_add(team, port);
 881         __team_queue_override_enabled_check(team);
 882 }
 883
 884 static void team_queue_override_port_change_queue_id(struct team *team,
 885                                                      struct team_port *port,
 886                                                      u16 new_queue_id)
 887 {
 888         if (team_port_enabled(port)) {
 889                 __team_queue_override_port_del(team, port);
 890                 port->queue_id = new_queue_id;
 891                 __team_queue_override_port_add(team, port);
 892                 __team_queue_override_enabled_check(team);
 893         } else {
 894                 port->queue_id = new_queue_id;
 895         }
 896 }
 897
 898 static void team_queue_override_port_add(struct team *team,
 899                                          struct team_port *port)
 900 {
 901         __team_queue_override_port_add(team, port);
 902         __team_queue_override_enabled_check(team);
 903 }
 904
 905 static void team_queue_override_port_del(struct team *team,
 906                                          struct team_port *port)
 907 {
 908         __team_queue_override_port_del(team, port);
 909         __team_queue_override_enabled_check(team);
 910 }
 911
 912
 913 /****************
 914  * Port handling
 915  ****************/
 916
 917 static bool team_port_find(const struct team *team,
 918                            const struct team_port *port)
 919 {
 920         struct team_port *cur;
 921
 922         list_for_each_entry(cur, &team->port_list, list)
 923                 if (cur == port)
 924                         return true;
 925         return false;
 926 }
 927
 928 /*
 929  * Enable/disable port by adding to enabled port hashlist and setting
 930  * port->index (Might be racy so reader could see incorrect ifindex when
 931  * processing a flying packet, but that is not a problem). Write guarded
 932  * by team->lock.
 933  */
 934 static void team_port_enable(struct team *team,
 935                              struct team_port *port)
 936 {
 937         if (team_port_enabled(port))
 938                 return;
 939         port->index = team->en_port_count++;
 940         hlist_add_head_rcu(&port->hlist,
 941                            team_port_index_hash(team, port->index));
 942         team_adjust_ops(team);
 943         team_queue_override_port_add(team, port);
 944         if (team->ops.port_enabled)
 945                 team->ops.port_enabled(team, port);
 946         team_notify_peers(team);
 947         team_mcast_rejoin(team);
 948         team_lower_state_changed(port);
 949 }
 950
 951 static void __reconstruct_port_hlist(struct team *team, int rm_index)
 952 {
 953         int i;
 954         struct team_port *port;
 955
 956         for (i = rm_index + 1; i < team->en_port_count; i++) {
 957                 port = team_get_port_by_index(team, i);
 958                 hlist_del_rcu(&port->hlist);
 959                 port->index--;
 960                 hlist_add_head_rcu(&port->hlist,
 961                                    team_port_index_hash(team, port->index));
 962         }
 963 }
 964
 965 static void team_port_disable(struct team *team,
 966                               struct team_port *port)
 967 {
 968         if (!team_port_enabled(port))
 969                 return;
 970         if (team->ops.port_disabled)
 971                 team->ops.port_disabled(team, port);
 972         hlist_del_rcu(&port->hlist);
 973         __reconstruct_port_hlist(team, port->index);
 974         port->index = -1;
 975         team->en_port_count--;
 976         team_queue_override_port_del(team, port);
 977         team_adjust_ops(team);
 978         team_lower_state_changed(port);
 979 }
 980
 981 #define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
 982                             NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE | \
 983                             NETIF_F_HIGHDMA | NETIF_F_LRO)
 984
 985 #define TEAM_ENC_FEATURES       (NETIF_F_HW_CSUM | NETIF_F_SG | \
 986                                  NETIF_F_RXCSUM | NETIF_F_GSO_SOFTWARE)
 987
 988 static void __team_compute_features(struct team *team)
 989 {
 990         struct team_port *port;
 991         netdev_features_t vlan_features = TEAM_VLAN_FEATURES &
 992                                           NETIF_F_ALL_FOR_ALL;
 993         netdev_features_t enc_features  = TEAM_ENC_FEATURES;
 994         unsigned short max_hard_header_len = ETH_HLEN;
 995         unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
 996                                         IFF_XMIT_DST_RELEASE_PERM;
 997
 998         rcu_read_lock();
 999         list_for_each_entry_rcu(port, &team->port_list, list) {
1000                 vlan_features = netdev_increment_features(vlan_features,
1001                                         port->dev->vlan_features,
1002                                         TEAM_VLAN_FEATURES);
1003                 enc_features =
1004                         netdev_increment_features(enc_features,
1005                                                   port->dev->hw_enc_features,
1006                                                   TEAM_ENC_FEATURES);
1007
1008
1009                 dst_release_flag &= port->dev->priv_flags;
1010                 if (port->dev->hard_header_len > max_hard_header_len)
1011                         max_hard_header_len = port->dev->hard_header_len;
1012         }
1013         rcu_read_unlock();
1014
1015         team->dev->vlan_features = vlan_features;
1016         team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL |
1017                                      NETIF_F_HW_VLAN_CTAG_TX |
1018                                      NETIF_F_HW_VLAN_STAG_TX;
1019         team->dev->hard_header_len = max_hard_header_len;
1020
1021         team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1022         if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1023                 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1024 }
1025
1026 static void team_compute_features(struct team *team)
1027 {
1028         __team_compute_features(team);
1029         netdev_change_features(team->dev);
1030 }
1031
1032 static int team_port_enter(struct team *team, struct team_port *port)
1033 {
1034         int err = 0;
1035
1036         dev_hold(team->dev);
1037         if (team->ops.port_enter) {
1038                 err = team->ops.port_enter(team, port);
1039                 if (err) {
1040                         netdev_err(team->dev, "Device %s failed to enter team mode\n",
1041                                    port->dev->name);
1042                         goto err_port_enter;
1043                 }
1044         }
1045
1046         return 0;
1047
1048 err_port_enter:
1049         dev_put(team->dev);
1050
1051         return err;
1052 }
1053
1054 static void team_port_leave(struct team *team, struct team_port *port)
1055 {
1056         if (team->ops.port_leave)
1057                 team->ops.port_leave(team, port);
1058         dev_put(team->dev);
1059 }
1060
1061 #ifdef CONFIG_NET_POLL_CONTROLLER
1062 static int __team_port_enable_netpoll(struct team_port *port)
1063 {
1064         struct netpoll *np;
1065         int err;
1066
1067         np = kzalloc(sizeof(*np), GFP_KERNEL);
1068         if (!np)
1069                 return -ENOMEM;
1070
1071         err = __netpoll_setup(np, port->dev);
1072         if (err) {
1073                 kfree(np);
1074                 return err;
1075         }
1076         port->np = np;
1077         return err;
1078 }
1079
1080 static int team_port_enable_netpoll(struct team_port *port)
1081 {
1082         if (!port->team->dev->npinfo)
1083                 return 0;
1084
1085         return __team_port_enable_netpoll(port);
1086 }
1087
1088 static void team_port_disable_netpoll(struct team_port *port)
1089 {
1090         struct netpoll *np = port->np;
1091
1092         if (!np)
1093                 return;
1094         port->np = NULL;
1095
1096         __netpoll_free(np);
1097 }
1098 #else
1099 static int team_port_enable_netpoll(struct team_port *port)
1100 {
1101         return 0;
1102 }
1103 static void team_port_disable_netpoll(struct team_port *port)
1104 {
1105 }
1106 #endif
1107
1108 static int team_upper_dev_link(struct team *team, struct team_port *port,
1109                                struct netlink_ext_ack *extack)
1110 {
1111         struct netdev_lag_upper_info lag_upper_info;
1112         int err;
1113
1114         lag_upper_info.tx_type = team->mode->lag_tx_type;
1115         lag_upper_info.hash_type = NETDEV_LAG_HASH_UNKNOWN;
1116         err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1117                                            &lag_upper_info, extack);
1118         if (err)
1119                 return err;
1120         port->dev->priv_flags |= IFF_TEAM_PORT;
1121         return 0;
1122 }
1123
1124 static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1125 {
1126         netdev_upper_dev_unlink(port->dev, team->dev);
1127         port->dev->priv_flags &= ~IFF_TEAM_PORT;
1128 }
1129
1130 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1131 static int team_dev_type_check_change(struct net_device *dev,
1132                                       struct net_device *port_dev);
1133
1134 static int team_port_add(struct team *team, struct net_device *port_dev,
1135                          struct netlink_ext_ack *extack)
1136 {
1137         struct net_device *dev = team->dev;
1138         struct team_port *port;
1139         char *portname = port_dev->name;
1140         int err;
1141
1142         if (port_dev->flags & IFF_LOOPBACK) {
1143                 NL_SET_ERR_MSG(extack, "Loopback device can't be added as a team port");
1144                 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1145                            portname);
1146                 return -EINVAL;
1147         }
1148
1149         if (netif_is_team_port(port_dev)) {
1150                 NL_SET_ERR_MSG(extack, "Device is already a port of a team device");
1151                 netdev_err(dev, "Device %s is already a port "
1152                                 "of a team device\n", portname);
1153                 return -EBUSY;
1154         }
1155
1156         if (dev == port_dev) {
1157                 NL_SET_ERR_MSG(extack, "Cannot enslave team device to itself");
1158                 netdev_err(dev, "Cannot enslave team device to itself\n");
1159                 return -EINVAL;
1160         }
1161
1162         if (netdev_has_upper_dev(dev, port_dev)) {
1163                 NL_SET_ERR_MSG(extack, "Device is already an upper device of the team interface");
1164                 netdev_err(dev, "Device %s is already an upper device of the team interface\n",
1165                            portname);
1166                 return -EBUSY;
1167         }
1168
1169         if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1170             vlan_uses_dev(dev)) {
1171                 NL_SET_ERR_MSG(extack, "Device is VLAN challenged and team device has VLAN set up");
1172                 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1173                            portname);
1174                 return -EPERM;
1175         }
1176
1177         err = team_dev_type_check_change(dev, port_dev);
1178         if (err)
1179                 return err;
1180
1181         if (port_dev->flags & IFF_UP) {
1182                 NL_SET_ERR_MSG(extack, "Device is up. Set it down before adding it as a team port");
1183                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1184                            portname);
1185                 return -EBUSY;
1186         }
1187
1188         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1189                        GFP_KERNEL);
1190         if (!port)
1191                 return -ENOMEM;
1192
1193         port->dev = port_dev;
1194         port->team = team;
1195         INIT_LIST_HEAD(&port->qom_list);
1196
1197         port->orig.mtu = port_dev->mtu;
1198         err = dev_set_mtu(port_dev, dev->mtu);
1199         if (err) {
1200                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1201                 goto err_set_mtu;
1202         }
1203
1204         memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1205
1206         err = team_port_enter(team, port);
1207         if (err) {
1208                 netdev_err(dev, "Device %s failed to enter team mode\n",
1209                            portname);
1210                 goto err_port_enter;
1211         }
1212
1213         err = dev_open(port_dev, extack);
1214         if (err) {
1215                 netdev_dbg(dev, "Device %s opening failed\n",
1216                            portname);
1217                 goto err_dev_open;
1218         }
1219
1220         err = vlan_vids_add_by_dev(port_dev, dev);
1221         if (err) {
1222                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1223                                 portname);
1224                 goto err_vids_add;
1225         }
1226
1227         err = team_port_enable_netpoll(port);
1228         if (err) {
1229                 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1230                            portname);
1231                 goto err_enable_netpoll;
1232         }
1233
1234         if (!(dev->features & NETIF_F_LRO))
1235                 dev_disable_lro(port_dev);
1236
1237         err = netdev_rx_handler_register(port_dev, team_handle_frame,
1238                                          port);
1239         if (err) {
1240                 netdev_err(dev, "Device %s failed to register rx_handler\n",
1241                            portname);
1242                 goto err_handler_register;
1243         }
1244
1245         err = team_upper_dev_link(team, port, extack);
1246         if (err) {
1247                 netdev_err(dev, "Device %s failed to set upper link\n",
1248                            portname);
1249                 goto err_set_upper_link;
1250         }
1251
1252         err = __team_option_inst_add_port(team, port);
1253         if (err) {
1254                 netdev_err(dev, "Device %s failed to add per-port options\n",
1255                            portname);
1256                 goto err_option_port_add;
1257         }
1258
1259         /* set promiscuity level to new slave */
1260         if (dev->flags & IFF_PROMISC) {
1261                 err = dev_set_promiscuity(port_dev, 1);
1262                 if (err)
1263                         goto err_set_slave_promisc;
1264         }
1265
1266         /* set allmulti level to new slave */
1267         if (dev->flags & IFF_ALLMULTI) {
1268                 err = dev_set_allmulti(port_dev, 1);
1269                 if (err) {
1270                         if (dev->flags & IFF_PROMISC)
1271                                 dev_set_promiscuity(port_dev, -1);
1272                         goto err_set_slave_promisc;
1273                 }
1274         }
1275
1276         if (dev->flags & IFF_UP) {
1277                 netif_addr_lock_bh(dev);
1278                 dev_uc_sync_multiple(port_dev, dev);
1279                 dev_mc_sync_multiple(port_dev, dev);
1280                 netif_addr_unlock_bh(dev);
1281         }
1282
1283         port->index = -1;
1284         list_add_tail_rcu(&port->list, &team->port_list);
1285         team_port_enable(team, port);
1286         __team_compute_features(team);
1287         __team_port_change_port_added(port, !!netif_oper_up(port_dev));
1288         __team_options_change_check(team);
1289
1290         netdev_info(dev, "Port device %s added\n", portname);
1291
1292         return 0;
1293
1294 err_set_slave_promisc:
1295         __team_option_inst_del_port(team, port);
1296
1297 err_option_port_add:
1298         team_upper_dev_unlink(team, port);
1299
1300 err_set_upper_link:
1301         netdev_rx_handler_unregister(port_dev);
1302
1303 err_handler_register:
1304         team_port_disable_netpoll(port);
1305
1306 err_enable_netpoll:
1307         vlan_vids_del_by_dev(port_dev, dev);
1308
1309 err_vids_add:
1310         dev_close(port_dev);
1311
1312 err_dev_open:
1313         team_port_leave(team, port);
1314         team_port_set_orig_dev_addr(port);
1315
1316 err_port_enter:
1317         dev_set_mtu(port_dev, port->orig.mtu);
1318
1319 err_set_mtu:
1320         kfree(port);
1321
1322         return err;
1323 }
1324
1325 static void __team_port_change_port_removed(struct team_port *port);
1326
1327 static int team_port_del(struct team *team, struct net_device *port_dev)
1328 {
1329         struct net_device *dev = team->dev;
1330         struct team_port *port;
1331         char *portname = port_dev->name;
1332
1333         port = team_port_get_rtnl(port_dev);
1334         if (!port || !team_port_find(team, port)) {
1335                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1336                            portname);
1337                 return -ENOENT;
1338         }
1339
1340         team_port_disable(team, port);
1341         list_del_rcu(&port->list);
1342
1343         if (dev->flags & IFF_PROMISC)
1344                 dev_set_promiscuity(port_dev, -1);
1345         if (dev->flags & IFF_ALLMULTI)
1346                 dev_set_allmulti(port_dev, -1);
1347
1348         team_upper_dev_unlink(team, port);
1349         netdev_rx_handler_unregister(port_dev);
1350         team_port_disable_netpoll(port);
1351         vlan_vids_del_by_dev(port_dev, dev);
1352         if (dev->flags & IFF_UP) {
1353                 dev_uc_unsync(port_dev, dev);
1354                 dev_mc_unsync(port_dev, dev);
1355         }
1356         dev_close(port_dev);
1357         team_port_leave(team, port);
1358
1359         __team_option_inst_mark_removed_port(team, port);
1360         __team_options_change_check(team);
1361         __team_option_inst_del_port(team, port);
1362         __team_port_change_port_removed(port);
1363
1364         team_port_set_orig_dev_addr(port);
1365         dev_set_mtu(port_dev, port->orig.mtu);
1366         kfree_rcu(port, rcu);
1367         netdev_info(dev, "Port device %s removed\n", portname);
1368         __team_compute_features(team);
1369
1370         return 0;
1371 }
1372
1373
1374 /*****************
1375  * Net device ops
1376  *****************/
1377
1378 static void team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1379 {
1380         ctx->data.str_val = team->mode->kind;
1381 }
1382
1383 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1384 {
1385         return team_change_mode(team, ctx->data.str_val);
1386 }
1387
1388 static void team_notify_peers_count_get(struct team *team,
1389                                         struct team_gsetter_ctx *ctx)
1390 {
1391         ctx->data.u32_val = team->notify_peers.count;
1392 }
1393
1394 static int team_notify_peers_count_set(struct team *team,
1395                                        struct team_gsetter_ctx *ctx)
1396 {
1397         team->notify_peers.count = ctx->data.u32_val;
1398         return 0;
1399 }
1400
1401 static void team_notify_peers_interval_get(struct team *team,
1402                                            struct team_gsetter_ctx *ctx)
1403 {
1404         ctx->data.u32_val = team->notify_peers.interval;
1405 }
1406
1407 static int team_notify_peers_interval_set(struct team *team,
1408                                           struct team_gsetter_ctx *ctx)
1409 {
1410         team->notify_peers.interval = ctx->data.u32_val;
1411         return 0;
1412 }
1413
1414 static void team_mcast_rejoin_count_get(struct team *team,
1415                                         struct team_gsetter_ctx *ctx)
1416 {
1417         ctx->data.u32_val = team->mcast_rejoin.count;
1418 }
1419
1420 static int team_mcast_rejoin_count_set(struct team *team,
1421                                        struct team_gsetter_ctx *ctx)
1422 {
1423         team->mcast_rejoin.count = ctx->data.u32_val;
1424         return 0;
1425 }
1426
1427 static void team_mcast_rejoin_interval_get(struct team *team,
1428                                            struct team_gsetter_ctx *ctx)
1429 {
1430         ctx->data.u32_val = team->mcast_rejoin.interval;
1431 }
1432
1433 static int team_mcast_rejoin_interval_set(struct team *team,
1434                                           struct team_gsetter_ctx *ctx)
1435 {
1436         team->mcast_rejoin.interval = ctx->data.u32_val;
1437         return 0;
1438 }
1439
1440 static void team_port_en_option_get(struct team *team,
1441                                     struct team_gsetter_ctx *ctx)
1442 {
1443         struct team_port *port = ctx->info->port;
1444
1445         ctx->data.bool_val = team_port_enabled(port);
1446 }
1447
1448 static int team_port_en_option_set(struct team *team,
1449                                    struct team_gsetter_ctx *ctx)
1450 {
1451         struct team_port *port = ctx->info->port;
1452
1453         if (ctx->data.bool_val)
1454                 team_port_enable(team, port);
1455         else
1456                 team_port_disable(team, port);
1457         return 0;
1458 }
1459
1460 static void team_user_linkup_option_get(struct team *team,
1461                                         struct team_gsetter_ctx *ctx)
1462 {
1463         struct team_port *port = ctx->info->port;
1464
1465         ctx->data.bool_val = port->user.linkup;
1466 }
1467
1468 static void __team_carrier_check(struct team *team);
1469
1470 static int team_user_linkup_option_set(struct team *team,
1471                                        struct team_gsetter_ctx *ctx)
1472 {
1473         struct team_port *port = ctx->info->port;
1474
1475         port->user.linkup = ctx->data.bool_val;
1476         team_refresh_port_linkup(port);
1477         __team_carrier_check(port->team);
1478         return 0;
1479 }
1480
1481 static void team_user_linkup_en_option_get(struct team *team,
1482                                            struct team_gsetter_ctx *ctx)
1483 {
1484         struct team_port *port = ctx->info->port;
1485
1486         ctx->data.bool_val = port->user.linkup_enabled;
1487 }
1488
1489 static int team_user_linkup_en_option_set(struct team *team,
1490                                           struct team_gsetter_ctx *ctx)
1491 {
1492         struct team_port *port = ctx->info->port;
1493
1494         port->user.linkup_enabled = ctx->data.bool_val;
1495         team_refresh_port_linkup(port);
1496         __team_carrier_check(port->team);
1497         return 0;
1498 }
1499
1500 static void team_priority_option_get(struct team *team,
1501                                      struct team_gsetter_ctx *ctx)
1502 {
1503         struct team_port *port = ctx->info->port;
1504
1505         ctx->data.s32_val = port->priority;
1506 }
1507
1508 static int team_priority_option_set(struct team *team,
1509                                     struct team_gsetter_ctx *ctx)
1510 {
1511         struct team_port *port = ctx->info->port;
1512         s32 priority = ctx->data.s32_val;
1513
1514         if (port->priority == priority)
1515                 return 0;
1516         port->priority = priority;
1517         team_queue_override_port_prio_changed(team, port);
1518         return 0;
1519 }
1520
1521 static void team_queue_id_option_get(struct team *team,
1522                                      struct team_gsetter_ctx *ctx)
1523 {
1524         struct team_port *port = ctx->info->port;
1525
1526         ctx->data.u32_val = port->queue_id;
1527 }
1528
1529 static int team_queue_id_option_set(struct team *team,
1530                                     struct team_gsetter_ctx *ctx)
1531 {
1532         struct team_port *port = ctx->info->port;
1533         u16 new_queue_id = ctx->data.u32_val;
1534
1535         if (port->queue_id == new_queue_id)
1536                 return 0;
1537         if (new_queue_id >= team->dev->real_num_tx_queues)
1538                 return -EINVAL;
1539         team_queue_override_port_change_queue_id(team, port, new_queue_id);
1540         return 0;
1541 }
1542
1543 static const struct team_option team_options[] = {
1544         {
1545                 .name = "mode",
1546                 .type = TEAM_OPTION_TYPE_STRING,
1547                 .getter = team_mode_option_get,
1548                 .setter = team_mode_option_set,
1549         },
1550         {
1551                 .name = "notify_peers_count",
1552                 .type = TEAM_OPTION_TYPE_U32,
1553                 .getter = team_notify_peers_count_get,
1554                 .setter = team_notify_peers_count_set,
1555         },
1556         {
1557                 .name = "notify_peers_interval",
1558                 .type = TEAM_OPTION_TYPE_U32,
1559                 .getter = team_notify_peers_interval_get,
1560                 .setter = team_notify_peers_interval_set,
1561         },
1562         {
1563                 .name = "mcast_rejoin_count",
1564                 .type = TEAM_OPTION_TYPE_U32,
1565                 .getter = team_mcast_rejoin_count_get,
1566                 .setter = team_mcast_rejoin_count_set,
1567         },
1568         {
1569                 .name = "mcast_rejoin_interval",
1570                 .type = TEAM_OPTION_TYPE_U32,
1571                 .getter = team_mcast_rejoin_interval_get,
1572                 .setter = team_mcast_rejoin_interval_set,
1573         },
1574         {
1575                 .name = "enabled",
1576                 .type = TEAM_OPTION_TYPE_BOOL,
1577                 .per_port = true,
1578                 .getter = team_port_en_option_get,
1579                 .setter = team_port_en_option_set,
1580         },
1581         {
1582                 .name = "user_linkup",
1583                 .type = TEAM_OPTION_TYPE_BOOL,
1584                 .per_port = true,
1585                 .getter = team_user_linkup_option_get,
1586                 .setter = team_user_linkup_option_set,
1587         },
1588         {
1589                 .name = "user_linkup_enabled",
1590                 .type = TEAM_OPTION_TYPE_BOOL,
1591                 .per_port = true,
1592                 .getter = team_user_linkup_en_option_get,
1593                 .setter = team_user_linkup_en_option_set,
1594         },
1595         {
1596                 .name = "priority",
1597                 .type = TEAM_OPTION_TYPE_S32,
1598                 .per_port = true,
1599                 .getter = team_priority_option_get,
1600                 .setter = team_priority_option_set,
1601         },
1602         {
1603                 .name = "queue_id",
1604                 .type = TEAM_OPTION_TYPE_U32,
1605                 .per_port = true,
1606                 .getter = team_queue_id_option_get,
1607                 .setter = team_queue_id_option_set,
1608         },
1609 };
1610
1611
1612 static int team_init(struct net_device *dev)
1613 {
1614         struct team *team = netdev_priv(dev);
1615         int i;
1616         int err;
1617
1618         team->dev = dev;
1619         team_set_no_mode(team);
1620         team->notifier_ctx = false;
1621
1622         team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1623         if (!team->pcpu_stats)
1624                 return -ENOMEM;
1625
1626         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1627                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1628         INIT_LIST_HEAD(&team->port_list);
1629         err = team_queue_override_init(team);
1630         if (err)
1631                 goto err_team_queue_override_init;
1632
1633         team_adjust_ops(team);
1634
1635         INIT_LIST_HEAD(&team->option_list);
1636         INIT_LIST_HEAD(&team->option_inst_list);
1637
1638         team_notify_peers_init(team);
1639         team_mcast_rejoin_init(team);
1640
1641         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1642         if (err)
1643                 goto err_options_register;
1644         netif_carrier_off(dev);
1645
1646         lockdep_register_key(&team->team_lock_key);
1647         __mutex_init(&team->lock, "team->team_lock_key", &team->team_lock_key);
1648         netdev_lockdep_set_classes(dev);
1649
1650         return 0;
1651
1652 err_options_register:
1653         team_mcast_rejoin_fini(team);
1654         team_notify_peers_fini(team);
1655         team_queue_override_fini(team);
1656 err_team_queue_override_init:
1657         free_percpu(team->pcpu_stats);
1658
1659         return err;
1660 }
1661
1662 static void team_uninit(struct net_device *dev)
1663 {
1664         struct team *team = netdev_priv(dev);
1665         struct team_port *port;
1666         struct team_port *tmp;
1667
1668         mutex_lock(&team->lock);
1669         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1670                 team_port_del(team, port->dev);
1671
1672         __team_change_mode(team, NULL); /* cleanup */
1673         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1674         team_mcast_rejoin_fini(team);
1675         team_notify_peers_fini(team);
1676         team_queue_override_fini(team);
1677         mutex_unlock(&team->lock);
1678         netdev_change_features(dev);
1679         lockdep_unregister_key(&team->team_lock_key);
1680 }
1681
1682 static void team_destructor(struct net_device *dev)
1683 {
1684         struct team *team = netdev_priv(dev);
1685
1686         free_percpu(team->pcpu_stats);
1687 }
1688
1689 static int team_open(struct net_device *dev)
1690 {
1691         return 0;
1692 }
1693
1694 static int team_close(struct net_device *dev)
1695 {
1696         struct team *team = netdev_priv(dev);
1697         struct team_port *port;
1698
1699         list_for_each_entry(port, &team->port_list, list) {
1700                 dev_uc_unsync(port->dev, dev);
1701                 dev_mc_unsync(port->dev, dev);
1702         }
1703
1704         return 0;
1705 }
1706
1707 /*
1708  * note: already called with rcu_read_lock
1709  */
1710 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1711 {
1712         struct team *team = netdev_priv(dev);
1713         bool tx_success;
1714         unsigned int len = skb->len;
1715
1716         tx_success = team_queue_override_transmit(team, skb);
1717         if (!tx_success)
1718                 tx_success = team->ops.transmit(team, skb);
1719         if (tx_success) {
1720                 struct team_pcpu_stats *pcpu_stats;
1721
1722                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1723                 u64_stats_update_begin(&pcpu_stats->syncp);
1724                 u64_stats_inc(&pcpu_stats->tx_packets);
1725                 u64_stats_add(&pcpu_stats->tx_bytes, len);
1726                 u64_stats_update_end(&pcpu_stats->syncp);
1727         } else {
1728                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1729         }
1730
1731         return NETDEV_TX_OK;
1732 }
1733
1734 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1735                              struct net_device *sb_dev)
1736 {
1737         /*
1738          * This helper function exists to help dev_pick_tx get the correct
1739          * destination queue.  Using a helper function skips a call to
1740          * skb_tx_hash and will put the skbs in the queue we expect on their
1741          * way down to the team driver.
1742          */
1743         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1744
1745         /*
1746          * Save the original txq to restore before passing to the driver
1747          */
1748         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1749
1750         if (unlikely(txq >= dev->real_num_tx_queues)) {
1751                 do {
1752                         txq -= dev->real_num_tx_queues;
1753                 } while (txq >= dev->real_num_tx_queues);
1754         }
1755         return txq;
1756 }
1757
1758 static void team_change_rx_flags(struct net_device *dev, int change)
1759 {
1760         struct team *team = netdev_priv(dev);
1761         struct team_port *port;
1762         int inc;
1763
1764         rcu_read_lock();
1765         list_for_each_entry_rcu(port, &team->port_list, list) {
1766                 if (change & IFF_PROMISC) {
1767                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1768                         dev_set_promiscuity(port->dev, inc);
1769                 }
1770                 if (change & IFF_ALLMULTI) {
1771                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1772                         dev_set_allmulti(port->dev, inc);
1773                 }
1774         }
1775         rcu_read_unlock();
1776 }
1777
1778 static void team_set_rx_mode(struct net_device *dev)
1779 {
1780         struct team *team = netdev_priv(dev);
1781         struct team_port *port;
1782
1783         rcu_read_lock();
1784         list_for_each_entry_rcu(port, &team->port_list, list) {
1785                 dev_uc_sync_multiple(port->dev, dev);
1786                 dev_mc_sync_multiple(port->dev, dev);
1787         }
1788         rcu_read_unlock();
1789 }
1790
1791 static int team_set_mac_address(struct net_device *dev, void *p)
1792 {
1793         struct sockaddr *addr = p;
1794         struct team *team = netdev_priv(dev);
1795         struct team_port *port;
1796
1797         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1798                 return -EADDRNOTAVAIL;
1799         dev_addr_set(dev, addr->sa_data);
1800         mutex_lock(&team->lock);
1801         list_for_each_entry(port, &team->port_list, list)
1802                 if (team->ops.port_change_dev_addr)
1803                         team->ops.port_change_dev_addr(team, port);
1804         mutex_unlock(&team->lock);
1805         return 0;
1806 }
1807
1808 static int team_change_mtu(struct net_device *dev, int new_mtu)
1809 {
1810         struct team *team = netdev_priv(dev);
1811         struct team_port *port;
1812         int err;
1813
1814         /*
1815          * Alhough this is reader, it's guarded by team lock. It's not possible
1816          * to traverse list in reverse under rcu_read_lock
1817          */
1818         mutex_lock(&team->lock);
1819         team->port_mtu_change_allowed = true;
1820         list_for_each_entry(port, &team->port_list, list) {
1821                 err = dev_set_mtu(port->dev, new_mtu);
1822                 if (err) {
1823                         netdev_err(dev, "Device %s failed to change mtu",
1824                                    port->dev->name);
1825                         goto unwind;
1826                 }
1827         }
1828         team->port_mtu_change_allowed = false;
1829         mutex_unlock(&team->lock);
1830
1831         dev->mtu = new_mtu;
1832
1833         return 0;
1834
1835 unwind:
1836         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1837                 dev_set_mtu(port->dev, dev->mtu);
1838         team->port_mtu_change_allowed = false;
1839         mutex_unlock(&team->lock);
1840
1841         return err;
1842 }
1843
1844 static void
1845 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1846 {
1847         struct team *team = netdev_priv(dev);
1848         struct team_pcpu_stats *p;
1849         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1850         u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1851         unsigned int start;
1852         int i;
1853
1854         for_each_possible_cpu(i) {
1855                 p = per_cpu_ptr(team->pcpu_stats, i);
1856                 do {
1857                         start = u64_stats_fetch_begin(&p->syncp);
1858                         rx_packets      = u64_stats_read(&p->rx_packets);
1859                         rx_bytes        = u64_stats_read(&p->rx_bytes);
1860                         rx_multicast    = u64_stats_read(&p->rx_multicast);
1861                         tx_packets      = u64_stats_read(&p->tx_packets);
1862                         tx_bytes        = u64_stats_read(&p->tx_bytes);
1863                 } while (u64_stats_fetch_retry(&p->syncp, start));
1864
1865                 stats->rx_packets       += rx_packets;
1866                 stats->rx_bytes         += rx_bytes;
1867                 stats->multicast        += rx_multicast;
1868                 stats->tx_packets       += tx_packets;
1869                 stats->tx_bytes         += tx_bytes;
1870                 /*
1871                  * rx_dropped, tx_dropped & rx_nohandler are u32,
1872                  * updated without syncp protection.
1873                  */
1874                 rx_dropped      += READ_ONCE(p->rx_dropped);
1875                 tx_dropped      += READ_ONCE(p->tx_dropped);
1876                 rx_nohandler    += READ_ONCE(p->rx_nohandler);
1877         }
1878         stats->rx_dropped       = rx_dropped;
1879         stats->tx_dropped       = tx_dropped;
1880         stats->rx_nohandler     = rx_nohandler;
1881 }
1882
1883 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1884 {
1885         struct team *team = netdev_priv(dev);
1886         struct team_port *port;
1887         int err;
1888
1889         /*
1890          * Alhough this is reader, it's guarded by team lock. It's not possible
1891          * to traverse list in reverse under rcu_read_lock
1892          */
1893         mutex_lock(&team->lock);
1894         list_for_each_entry(port, &team->port_list, list) {
1895                 err = vlan_vid_add(port->dev, proto, vid);
1896                 if (err)
1897                         goto unwind;
1898         }
1899         mutex_unlock(&team->lock);
1900
1901         return 0;
1902
1903 unwind:
1904         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1905                 vlan_vid_del(port->dev, proto, vid);
1906         mutex_unlock(&team->lock);
1907
1908         return err;
1909 }
1910
1911 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1912 {
1913         struct team *team = netdev_priv(dev);
1914         struct team_port *port;
1915
1916         mutex_lock(&team->lock);
1917         list_for_each_entry(port, &team->port_list, list)
1918                 vlan_vid_del(port->dev, proto, vid);
1919         mutex_unlock(&team->lock);
1920
1921         return 0;
1922 }
1923
1924 #ifdef CONFIG_NET_POLL_CONTROLLER
1925 static void team_poll_controller(struct net_device *dev)
1926 {
1927 }
1928
1929 static void __team_netpoll_cleanup(struct team *team)
1930 {
1931         struct team_port *port;
1932
1933         list_for_each_entry(port, &team->port_list, list)
1934                 team_port_disable_netpoll(port);
1935 }
1936
1937 static void team_netpoll_cleanup(struct net_device *dev)
1938 {
1939         struct team *team = netdev_priv(dev);
1940
1941         mutex_lock(&team->lock);
1942         __team_netpoll_cleanup(team);
1943         mutex_unlock(&team->lock);
1944 }
1945
1946 static int team_netpoll_setup(struct net_device *dev,
1947                               struct netpoll_info *npifo)
1948 {
1949         struct team *team = netdev_priv(dev);
1950         struct team_port *port;
1951         int err = 0;
1952
1953         mutex_lock(&team->lock);
1954         list_for_each_entry(port, &team->port_list, list) {
1955                 err = __team_port_enable_netpoll(port);
1956                 if (err) {
1957                         __team_netpoll_cleanup(team);
1958                         break;
1959                 }
1960         }
1961         mutex_unlock(&team->lock);
1962         return err;
1963 }
1964 #endif
1965
1966 static int team_add_slave(struct net_device *dev, struct net_device *port_dev,
1967                           struct netlink_ext_ack *extack)
1968 {
1969         struct team *team = netdev_priv(dev);
1970         int err;
1971
1972         mutex_lock(&team->lock);
1973         err = team_port_add(team, port_dev, extack);
1974         mutex_unlock(&team->lock);
1975
1976         if (!err)
1977                 netdev_change_features(dev);
1978
1979         return err;
1980 }
1981
1982 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1983 {
1984         struct team *team = netdev_priv(dev);
1985         int err;
1986
1987         mutex_lock(&team->lock);
1988         err = team_port_del(team, port_dev);
1989         mutex_unlock(&team->lock);
1990
1991         if (err)
1992                 return err;
1993
1994         if (netif_is_team_master(port_dev)) {
1995                 lockdep_unregister_key(&team->team_lock_key);
1996                 lockdep_register_key(&team->team_lock_key);
1997                 lockdep_set_class(&team->lock, &team->team_lock_key);
1998         }
1999         netdev_change_features(dev);
2000
2001         return err;
2002 }
2003
2004 static netdev_features_t team_fix_features(struct net_device *dev,
2005                                            netdev_features_t features)
2006 {
2007         struct team_port *port;
2008         struct team *team = netdev_priv(dev);
2009         netdev_features_t mask;
2010
2011         mask = features;
2012         features &= ~NETIF_F_ONE_FOR_ALL;
2013         features |= NETIF_F_ALL_FOR_ALL;
2014
2015         rcu_read_lock();
2016         list_for_each_entry_rcu(port, &team->port_list, list) {
2017                 features = netdev_increment_features(features,
2018                                                      port->dev->features,
2019                                                      mask);
2020         }
2021         rcu_read_unlock();
2022
2023         features = netdev_add_tso_features(features, mask);
2024
2025         return features;
2026 }
2027
2028 static int team_change_carrier(struct net_device *dev, bool new_carrier)
2029 {
2030         struct team *team = netdev_priv(dev);
2031
2032         team->user_carrier_enabled = true;
2033
2034         if (new_carrier)
2035                 netif_carrier_on(dev);
2036         else
2037                 netif_carrier_off(dev);
2038         return 0;
2039 }
2040
2041 static const struct net_device_ops team_netdev_ops = {
2042         .ndo_init               = team_init,
2043         .ndo_uninit             = team_uninit,
2044         .ndo_open               = team_open,
2045         .ndo_stop               = team_close,
2046         .ndo_start_xmit         = team_xmit,
2047         .ndo_select_queue       = team_select_queue,
2048         .ndo_change_rx_flags    = team_change_rx_flags,
2049         .ndo_set_rx_mode        = team_set_rx_mode,
2050         .ndo_set_mac_address    = team_set_mac_address,
2051         .ndo_change_mtu         = team_change_mtu,
2052         .ndo_get_stats64        = team_get_stats64,
2053         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
2054         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
2055 #ifdef CONFIG_NET_POLL_CONTROLLER
2056         .ndo_poll_controller    = team_poll_controller,
2057         .ndo_netpoll_setup      = team_netpoll_setup,
2058         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
2059 #endif
2060         .ndo_add_slave          = team_add_slave,
2061         .ndo_del_slave          = team_del_slave,
2062         .ndo_fix_features       = team_fix_features,
2063         .ndo_change_carrier     = team_change_carrier,
2064         .ndo_features_check     = passthru_features_check,
2065 };
2066
2067 /***********************
2068  * ethtool interface
2069  ***********************/
2070
2071 static void team_ethtool_get_drvinfo(struct net_device *dev,
2072                                      struct ethtool_drvinfo *drvinfo)
2073 {
2074         strscpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2075         strscpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2076 }
2077
2078 static int team_ethtool_get_link_ksettings(struct net_device *dev,
2079                                            struct ethtool_link_ksettings *cmd)
2080 {
2081         struct team *team= netdev_priv(dev);
2082         unsigned long speed = 0;
2083         struct team_port *port;
2084
2085         cmd->base.duplex = DUPLEX_UNKNOWN;
2086         cmd->base.port = PORT_OTHER;
2087
2088         rcu_read_lock();
2089         list_for_each_entry_rcu(port, &team->port_list, list) {
2090                 if (team_port_txable(port)) {
2091                         if (port->state.speed != SPEED_UNKNOWN)
2092                                 speed += port->state.speed;
2093                         if (cmd->base.duplex == DUPLEX_UNKNOWN &&
2094                             port->state.duplex != DUPLEX_UNKNOWN)
2095                                 cmd->base.duplex = port->state.duplex;
2096                 }
2097         }
2098         rcu_read_unlock();
2099
2100         cmd->base.speed = speed ? : SPEED_UNKNOWN;
2101
2102         return 0;
2103 }
2104
2105 static const struct ethtool_ops team_ethtool_ops = {
2106         .get_drvinfo            = team_ethtool_get_drvinfo,
2107         .get_link               = ethtool_op_get_link,
2108         .get_link_ksettings     = team_ethtool_get_link_ksettings,
2109 };
2110
2111 /***********************
2112  * rt netlink interface
2113  ***********************/
2114
2115 static void team_setup_by_port(struct net_device *dev,
2116                                struct net_device *port_dev)
2117 {
2118         dev->header_ops = port_dev->header_ops;
2119         dev->type = port_dev->type;
2120         dev->hard_header_len = port_dev->hard_header_len;
2121         dev->needed_headroom = port_dev->needed_headroom;
2122         dev->addr_len = port_dev->addr_len;
2123         dev->mtu = port_dev->mtu;
2124         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2125         eth_hw_addr_inherit(dev, port_dev);
2126
2127         if (port_dev->flags & IFF_POINTOPOINT) {
2128                 dev->flags &= ~(IFF_BROADCAST | IFF_MULTICAST);
2129                 dev->flags |= (IFF_POINTOPOINT | IFF_NOARP);
2130         } else if ((port_dev->flags & (IFF_BROADCAST | IFF_MULTICAST)) ==
2131                     (IFF_BROADCAST | IFF_MULTICAST)) {
2132                 dev->flags |= (IFF_BROADCAST | IFF_MULTICAST);
2133                 dev->flags &= ~(IFF_POINTOPOINT | IFF_NOARP);
2134         }
2135 }
2136
2137 static int team_dev_type_check_change(struct net_device *dev,
2138                                       struct net_device *port_dev)
2139 {
2140         struct team *team = netdev_priv(dev);
2141         char *portname = port_dev->name;
2142         int err;
2143
2144         if (dev->type == port_dev->type)
2145                 return 0;
2146         if (!list_empty(&team->port_list)) {
2147                 netdev_err(dev, "Device %s is of different type\n", portname);
2148                 return -EBUSY;
2149         }
2150         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2151         err = notifier_to_errno(err);
2152         if (err) {
2153                 netdev_err(dev, "Refused to change device type\n");
2154                 return err;
2155         }
2156         dev_uc_flush(dev);
2157         dev_mc_flush(dev);
2158         team_setup_by_port(dev, port_dev);
2159         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2160         return 0;
2161 }
2162
2163 static void team_setup(struct net_device *dev)
2164 {
2165         ether_setup(dev);
2166         dev->max_mtu = ETH_MAX_MTU;
2167
2168         dev->netdev_ops = &team_netdev_ops;
2169         dev->ethtool_ops = &team_ethtool_ops;
2170         dev->needs_free_netdev = true;
2171         dev->priv_destructor = team_destructor;
2172         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2173         dev->priv_flags |= IFF_NO_QUEUE;
2174         dev->priv_flags |= IFF_TEAM;
2175
2176         /*
2177          * Indicate we support unicast address filtering. That way core won't
2178          * bring us to promisc mode in case a unicast addr is added.
2179          * Let this up to underlay drivers.
2180          */
2181         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2182
2183         dev->features |= NETIF_F_LLTX;
2184         dev->features |= NETIF_F_GRO;
2185
2186         /* Don't allow team devices to change network namespaces. */
2187         dev->features |= NETIF_F_NETNS_LOCAL;
2188
2189         dev->hw_features = TEAM_VLAN_FEATURES |
2190                            NETIF_F_HW_VLAN_CTAG_RX |
2191                            NETIF_F_HW_VLAN_CTAG_FILTER |
2192                            NETIF_F_HW_VLAN_STAG_RX |
2193                            NETIF_F_HW_VLAN_STAG_FILTER;
2194
2195         dev->hw_features |= NETIF_F_GSO_ENCAP_ALL;
2196         dev->features |= dev->hw_features;
2197         dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
2198 }
2199
2200 static int team_newlink(struct net *src_net, struct net_device *dev,
2201                         struct nlattr *tb[], struct nlattr *data[],
2202                         struct netlink_ext_ack *extack)
2203 {
2204         if (tb[IFLA_ADDRESS] == NULL)
2205                 eth_hw_addr_random(dev);
2206
2207         return register_netdevice(dev);
2208 }
2209
2210 static int team_validate(struct nlattr *tb[], struct nlattr *data[],
2211                          struct netlink_ext_ack *extack)
2212 {
2213         if (tb[IFLA_ADDRESS]) {
2214                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2215                         return -EINVAL;
2216                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2217                         return -EADDRNOTAVAIL;
2218         }
2219         return 0;
2220 }
2221
2222 static unsigned int team_get_num_tx_queues(void)
2223 {
2224         return TEAM_DEFAULT_NUM_TX_QUEUES;
2225 }
2226
2227 static unsigned int team_get_num_rx_queues(void)
2228 {
2229         return TEAM_DEFAULT_NUM_RX_QUEUES;
2230 }
2231
2232 static struct rtnl_link_ops team_link_ops __read_mostly = {
2233         .kind                   = DRV_NAME,
2234         .priv_size              = sizeof(struct team),
2235         .setup                  = team_setup,
2236         .newlink                = team_newlink,
2237         .validate               = team_validate,
2238         .get_num_tx_queues      = team_get_num_tx_queues,
2239         .get_num_rx_queues      = team_get_num_rx_queues,
2240 };
2241
2242
2243 /***********************************
2244  * Generic netlink custom interface
2245  ***********************************/
2246
2247 static struct genl_family team_nl_family;
2248
2249 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2250         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
2251         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
2252         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
2253         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
2254 };
2255
2256 static const struct nla_policy
2257 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2258         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
2259         [TEAM_ATTR_OPTION_NAME] = {
2260                 .type = NLA_STRING,
2261                 .len = TEAM_STRING_MAX_LEN,
2262         },
2263         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
2264         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
2265         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
2266         [TEAM_ATTR_OPTION_PORT_IFINDEX]         = { .type = NLA_U32 },
2267         [TEAM_ATTR_OPTION_ARRAY_INDEX]          = { .type = NLA_U32 },
2268 };
2269
2270 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2271 {
2272         struct sk_buff *msg;
2273         void *hdr;
2274         int err;
2275
2276         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2277         if (!msg)
2278                 return -ENOMEM;
2279
2280         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2281                           &team_nl_family, 0, TEAM_CMD_NOOP);
2282         if (!hdr) {
2283                 err = -EMSGSIZE;
2284                 goto err_msg_put;
2285         }
2286
2287         genlmsg_end(msg, hdr);
2288
2289         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2290
2291 err_msg_put:
2292         nlmsg_free(msg);
2293
2294         return err;
2295 }
2296
2297 /*
2298  * Netlink cmd functions should be locked by following two functions.
2299  * Since dev gets held here, that ensures dev won't disappear in between.
2300  */
2301 static struct team *team_nl_team_get(struct genl_info *info)
2302 {
2303         struct net *net = genl_info_net(info);
2304         int ifindex;
2305         struct net_device *dev;
2306         struct team *team;
2307
2308         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2309                 return NULL;
2310
2311         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2312         dev = dev_get_by_index(net, ifindex);
2313         if (!dev || dev->netdev_ops != &team_netdev_ops) {
2314                 dev_put(dev);
2315                 return NULL;
2316         }
2317
2318         team = netdev_priv(dev);
2319         mutex_lock(&team->lock);
2320         return team;
2321 }
2322
2323 static void team_nl_team_put(struct team *team)
2324 {
2325         mutex_unlock(&team->lock);
2326         dev_put(team->dev);
2327 }
2328
2329 typedef int team_nl_send_func_t(struct sk_buff *skb,
2330                                 struct team *team, u32 portid);
2331
2332 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2333 {
2334         return genlmsg_unicast(dev_net(team->dev), skb, portid);
2335 }
2336
2337 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2338                                        struct team_option_inst *opt_inst)
2339 {
2340         struct nlattr *option_item;
2341         struct team_option *option = opt_inst->option;
2342         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2343         struct team_gsetter_ctx ctx;
2344         int err;
2345
2346         ctx.info = opt_inst_info;
2347         err = team_option_get(team, opt_inst, &ctx);
2348         if (err)
2349                 return err;
2350
2351         option_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_OPTION);
2352         if (!option_item)
2353                 return -EMSGSIZE;
2354
2355         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2356                 goto nest_cancel;
2357         if (opt_inst_info->port &&
2358             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2359                         opt_inst_info->port->dev->ifindex))
2360                 goto nest_cancel;
2361         if (opt_inst->option->array_size &&
2362             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2363                         opt_inst_info->array_index))
2364                 goto nest_cancel;
2365
2366         switch (option->type) {
2367         case TEAM_OPTION_TYPE_U32:
2368                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2369                         goto nest_cancel;
2370                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2371                         goto nest_cancel;
2372                 break;
2373         case TEAM_OPTION_TYPE_STRING:
2374                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2375                         goto nest_cancel;
2376                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2377                                    ctx.data.str_val))
2378                         goto nest_cancel;
2379                 break;
2380         case TEAM_OPTION_TYPE_BINARY:
2381                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2382                         goto nest_cancel;
2383                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2384                             ctx.data.bin_val.ptr))
2385                         goto nest_cancel;
2386                 break;
2387         case TEAM_OPTION_TYPE_BOOL:
2388                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2389                         goto nest_cancel;
2390                 if (ctx.data.bool_val &&
2391                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2392                         goto nest_cancel;
2393                 break;
2394         case TEAM_OPTION_TYPE_S32:
2395                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2396                         goto nest_cancel;
2397                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2398                         goto nest_cancel;
2399                 break;
2400         default:
2401                 BUG();
2402         }
2403         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2404                 goto nest_cancel;
2405         if (opt_inst->changed) {
2406                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2407                         goto nest_cancel;
2408                 opt_inst->changed = false;
2409         }
2410         nla_nest_end(skb, option_item);
2411         return 0;
2412
2413 nest_cancel:
2414         nla_nest_cancel(skb, option_item);
2415         return -EMSGSIZE;
2416 }
2417
2418 static int __send_and_alloc_skb(struct sk_buff **pskb,
2419                                 struct team *team, u32 portid,
2420                                 team_nl_send_func_t *send_func)
2421 {
2422         int err;
2423
2424         if (*pskb) {
2425                 err = send_func(*pskb, team, portid);
2426                 if (err)
2427                         return err;
2428         }
2429         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2430         if (!*pskb)
2431                 return -ENOMEM;
2432         return 0;
2433 }
2434
2435 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2436                                     int flags, team_nl_send_func_t *send_func,
2437                                     struct list_head *sel_opt_inst_list)
2438 {
2439         struct nlattr *option_list;
2440         struct nlmsghdr *nlh;
2441         void *hdr;
2442         struct team_option_inst *opt_inst;
2443         int err;
2444         struct sk_buff *skb = NULL;
2445         bool incomplete;
2446         int i;
2447
2448         opt_inst = list_first_entry(sel_opt_inst_list,
2449                                     struct team_option_inst, tmp_list);
2450
2451 start_again:
2452         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2453         if (err)
2454                 return err;
2455
2456         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2457                           TEAM_CMD_OPTIONS_GET);
2458         if (!hdr) {
2459                 nlmsg_free(skb);
2460                 return -EMSGSIZE;
2461         }
2462
2463         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2464                 goto nla_put_failure;
2465         option_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_OPTION);
2466         if (!option_list)
2467                 goto nla_put_failure;
2468
2469         i = 0;
2470         incomplete = false;
2471         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2472                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2473                 if (err) {
2474                         if (err == -EMSGSIZE) {
2475                                 if (!i)
2476                                         goto errout;
2477                                 incomplete = true;
2478                                 break;
2479                         }
2480                         goto errout;
2481                 }
2482                 i++;
2483         }
2484
2485         nla_nest_end(skb, option_list);
2486         genlmsg_end(skb, hdr);
2487         if (incomplete)
2488                 goto start_again;
2489
2490 send_done:
2491         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2492         if (!nlh) {
2493                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2494                 if (err)
2495                         return err;
2496                 goto send_done;
2497         }
2498
2499         return send_func(skb, team, portid);
2500
2501 nla_put_failure:
2502         err = -EMSGSIZE;
2503 errout:
2504         nlmsg_free(skb);
2505         return err;
2506 }
2507
2508 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2509 {
2510         struct team *team;
2511         struct team_option_inst *opt_inst;
2512         int err;
2513         LIST_HEAD(sel_opt_inst_list);
2514
2515         team = team_nl_team_get(info);
2516         if (!team)
2517                 return -EINVAL;
2518
2519         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2520                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2521         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2522                                        NLM_F_ACK, team_nl_send_unicast,
2523                                        &sel_opt_inst_list);
2524
2525         team_nl_team_put(team);
2526
2527         return err;
2528 }
2529
2530 static int team_nl_send_event_options_get(struct team *team,
2531                                           struct list_head *sel_opt_inst_list);
2532
2533 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2534 {
2535         struct team *team;
2536         int err = 0;
2537         int i;
2538         struct nlattr *nl_option;
2539
2540         rtnl_lock();
2541
2542         team = team_nl_team_get(info);
2543         if (!team) {
2544                 err = -EINVAL;
2545                 goto rtnl_unlock;
2546         }
2547
2548         err = -EINVAL;
2549         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2550                 err = -EINVAL;
2551                 goto team_put;
2552         }
2553
2554         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2555                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2556                 struct nlattr *attr;
2557                 struct nlattr *attr_data;
2558                 LIST_HEAD(opt_inst_list);
2559                 enum team_option_type opt_type;
2560                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2561                 u32 opt_array_index = 0;
2562                 bool opt_is_array = false;
2563                 struct team_option_inst *opt_inst;
2564                 char *opt_name;
2565                 bool opt_found = false;
2566
2567                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2568                         err = -EINVAL;
2569                         goto team_put;
2570                 }
2571                 err = nla_parse_nested_deprecated(opt_attrs,
2572                                                   TEAM_ATTR_OPTION_MAX,
2573                                                   nl_option,
2574                                                   team_nl_option_policy,
2575                                                   info->extack);
2576                 if (err)
2577                         goto team_put;
2578                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2579                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2580                         err = -EINVAL;
2581                         goto team_put;
2582                 }
2583                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2584                 case NLA_U32:
2585                         opt_type = TEAM_OPTION_TYPE_U32;
2586                         break;
2587                 case NLA_STRING:
2588                         opt_type = TEAM_OPTION_TYPE_STRING;
2589                         break;
2590                 case NLA_BINARY:
2591                         opt_type = TEAM_OPTION_TYPE_BINARY;
2592                         break;
2593                 case NLA_FLAG:
2594                         opt_type = TEAM_OPTION_TYPE_BOOL;
2595                         break;
2596                 case NLA_S32:
2597                         opt_type = TEAM_OPTION_TYPE_S32;
2598                         break;
2599                 default:
2600                         goto team_put;
2601                 }
2602
2603                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2604                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2605                         err = -EINVAL;
2606                         goto team_put;
2607                 }
2608
2609                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2610                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2611                 if (attr)
2612                         opt_port_ifindex = nla_get_u32(attr);
2613
2614                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2615                 if (attr) {
2616                         opt_is_array = true;
2617                         opt_array_index = nla_get_u32(attr);
2618                 }
2619
2620                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2621                         struct team_option *option = opt_inst->option;
2622                         struct team_gsetter_ctx ctx;
2623                         struct team_option_inst_info *opt_inst_info;
2624                         int tmp_ifindex;
2625
2626                         opt_inst_info = &opt_inst->info;
2627                         tmp_ifindex = opt_inst_info->port ?
2628                                       opt_inst_info->port->dev->ifindex : 0;
2629                         if (option->type != opt_type ||
2630                             strcmp(option->name, opt_name) ||
2631                             tmp_ifindex != opt_port_ifindex ||
2632                             (option->array_size && !opt_is_array) ||
2633                             opt_inst_info->array_index != opt_array_index)
2634                                 continue;
2635                         opt_found = true;
2636                         ctx.info = opt_inst_info;
2637                         switch (opt_type) {
2638                         case TEAM_OPTION_TYPE_U32:
2639                                 ctx.data.u32_val = nla_get_u32(attr_data);
2640                                 break;
2641                         case TEAM_OPTION_TYPE_STRING:
2642                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2643                                         err = -EINVAL;
2644                                         goto team_put;
2645                                 }
2646                                 ctx.data.str_val = nla_data(attr_data);
2647                                 break;
2648                         case TEAM_OPTION_TYPE_BINARY:
2649                                 ctx.data.bin_val.len = nla_len(attr_data);
2650                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2651                                 break;
2652                         case TEAM_OPTION_TYPE_BOOL:
2653                                 ctx.data.bool_val = attr_data ? true : false;
2654                                 break;
2655                         case TEAM_OPTION_TYPE_S32:
2656                                 ctx.data.s32_val = nla_get_s32(attr_data);
2657                                 break;
2658                         default:
2659                                 BUG();
2660                         }
2661                         err = team_option_set(team, opt_inst, &ctx);
2662                         if (err)
2663                                 goto team_put;
2664                         opt_inst->changed = true;
2665                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2666                 }
2667                 if (!opt_found) {
2668                         err = -ENOENT;
2669                         goto team_put;
2670                 }
2671
2672                 err = team_nl_send_event_options_get(team, &opt_inst_list);
2673                 if (err)
2674                         break;
2675         }
2676
2677 team_put:
2678         team_nl_team_put(team);
2679 rtnl_unlock:
2680         rtnl_unlock();
2681         return err;
2682 }
2683
2684 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2685                                      struct team_port *port)
2686 {
2687         struct nlattr *port_item;
2688
2689         port_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_PORT);
2690         if (!port_item)
2691                 goto nest_cancel;
2692         if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2693                 goto nest_cancel;
2694         if (port->changed) {
2695                 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2696                         goto nest_cancel;
2697                 port->changed = false;
2698         }
2699         if ((port->removed &&
2700              nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2701             (port->state.linkup &&
2702              nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2703             nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2704             nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2705                 goto nest_cancel;
2706         nla_nest_end(skb, port_item);
2707         return 0;
2708
2709 nest_cancel:
2710         nla_nest_cancel(skb, port_item);
2711         return -EMSGSIZE;
2712 }
2713
2714 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2715                                       int flags, team_nl_send_func_t *send_func,
2716                                       struct team_port *one_port)
2717 {
2718         struct nlattr *port_list;
2719         struct nlmsghdr *nlh;
2720         void *hdr;
2721         struct team_port *port;
2722         int err;
2723         struct sk_buff *skb = NULL;
2724         bool incomplete;
2725         int i;
2726
2727         port = list_first_entry_or_null(&team->port_list,
2728                                         struct team_port, list);
2729
2730 start_again:
2731         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2732         if (err)
2733                 return err;
2734
2735         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2736                           TEAM_CMD_PORT_LIST_GET);
2737         if (!hdr) {
2738                 nlmsg_free(skb);
2739                 return -EMSGSIZE;
2740         }
2741
2742         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2743                 goto nla_put_failure;
2744         port_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_PORT);
2745         if (!port_list)
2746                 goto nla_put_failure;
2747
2748         i = 0;
2749         incomplete = false;
2750
2751         /* If one port is selected, called wants to send port list containing
2752          * only this port. Otherwise go through all listed ports and send all
2753          */
2754         if (one_port) {
2755                 err = team_nl_fill_one_port_get(skb, one_port);
2756                 if (err)
2757                         goto errout;
2758         } else if (port) {
2759                 list_for_each_entry_from(port, &team->port_list, list) {
2760                         err = team_nl_fill_one_port_get(skb, port);
2761                         if (err) {
2762                                 if (err == -EMSGSIZE) {
2763                                         if (!i)
2764                                                 goto errout;
2765                                         incomplete = true;
2766                                         break;
2767                                 }
2768                                 goto errout;
2769                         }
2770                         i++;
2771                 }
2772         }
2773
2774         nla_nest_end(skb, port_list);
2775         genlmsg_end(skb, hdr);
2776         if (incomplete)
2777                 goto start_again;
2778
2779 send_done:
2780         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2781         if (!nlh) {
2782                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2783                 if (err)
2784                         return err;
2785                 goto send_done;
2786         }
2787
2788         return send_func(skb, team, portid);
2789
2790 nla_put_failure:
2791         err = -EMSGSIZE;
2792 errout:
2793         nlmsg_free(skb);
2794         return err;
2795 }
2796
2797 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2798                                      struct genl_info *info)
2799 {
2800         struct team *team;
2801         int err;
2802
2803         team = team_nl_team_get(info);
2804         if (!team)
2805                 return -EINVAL;
2806
2807         err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2808                                          NLM_F_ACK, team_nl_send_unicast, NULL);
2809
2810         team_nl_team_put(team);
2811
2812         return err;
2813 }
2814
2815 static const struct genl_small_ops team_nl_ops[] = {
2816         {
2817                 .cmd = TEAM_CMD_NOOP,
2818                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2819                 .doit = team_nl_cmd_noop,
2820         },
2821         {
2822                 .cmd = TEAM_CMD_OPTIONS_SET,
2823                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2824                 .doit = team_nl_cmd_options_set,
2825                 .flags = GENL_ADMIN_PERM,
2826         },
2827         {
2828                 .cmd = TEAM_CMD_OPTIONS_GET,
2829                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2830                 .doit = team_nl_cmd_options_get,
2831                 .flags = GENL_ADMIN_PERM,
2832         },
2833         {
2834                 .cmd = TEAM_CMD_PORT_LIST_GET,
2835                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2836                 .doit = team_nl_cmd_port_list_get,
2837                 .flags = GENL_ADMIN_PERM,
2838         },
2839 };
2840
2841 static const struct genl_multicast_group team_nl_mcgrps[] = {
2842         { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2843 };
2844
2845 static struct genl_family team_nl_family __ro_after_init = {
2846         .name           = TEAM_GENL_NAME,
2847         .version        = TEAM_GENL_VERSION,
2848         .maxattr        = TEAM_ATTR_MAX,
2849         .policy = team_nl_policy,
2850         .netnsok        = true,
2851         .module         = THIS_MODULE,
2852         .small_ops      = team_nl_ops,
2853         .n_small_ops    = ARRAY_SIZE(team_nl_ops),
2854         .resv_start_op  = TEAM_CMD_PORT_LIST_GET + 1,
2855         .mcgrps         = team_nl_mcgrps,
2856         .n_mcgrps       = ARRAY_SIZE(team_nl_mcgrps),
2857 };
2858
2859 static int team_nl_send_multicast(struct sk_buff *skb,
2860                                   struct team *team, u32 portid)
2861 {
2862         return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2863                                        skb, 0, 0, GFP_KERNEL);
2864 }
2865
2866 static int team_nl_send_event_options_get(struct team *team,
2867                                           struct list_head *sel_opt_inst_list)
2868 {
2869         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2870                                         sel_opt_inst_list);
2871 }
2872
2873 static int team_nl_send_event_port_get(struct team *team,
2874                                        struct team_port *port)
2875 {
2876         return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2877                                           port);
2878 }
2879
2880 static int __init team_nl_init(void)
2881 {
2882         return genl_register_family(&team_nl_family);
2883 }
2884
2885 static void __exit team_nl_fini(void)
2886 {
2887         genl_unregister_family(&team_nl_family);
2888 }
2889
2890
2891 /******************
2892  * Change checkers
2893  ******************/
2894
2895 static void __team_options_change_check(struct team *team)
2896 {
2897         int err;
2898         struct team_option_inst *opt_inst;
2899         LIST_HEAD(sel_opt_inst_list);
2900
2901         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2902                 if (opt_inst->changed)
2903                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2904         }
2905         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2906         if (err && err != -ESRCH)
2907                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2908                             err);
2909 }
2910
2911 /* rtnl lock is held */
2912
2913 static void __team_port_change_send(struct team_port *port, bool linkup)
2914 {
2915         int err;
2916
2917         port->changed = true;
2918         port->state.linkup = linkup;
2919         team_refresh_port_linkup(port);
2920         if (linkup) {
2921                 struct ethtool_link_ksettings ecmd;
2922
2923                 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2924                 if (!err) {
2925                         port->state.speed = ecmd.base.speed;
2926                         port->state.duplex = ecmd.base.duplex;
2927                         goto send_event;
2928                 }
2929         }
2930         port->state.speed = 0;
2931         port->state.duplex = 0;
2932
2933 send_event:
2934         err = team_nl_send_event_port_get(port->team, port);
2935         if (err && err != -ESRCH)
2936                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2937                             port->dev->name, err);
2938
2939 }
2940
2941 static void __team_carrier_check(struct team *team)
2942 {
2943         struct team_port *port;
2944         bool team_linkup;
2945
2946         if (team->user_carrier_enabled)
2947                 return;
2948
2949         team_linkup = false;
2950         list_for_each_entry(port, &team->port_list, list) {
2951                 if (port->linkup) {
2952                         team_linkup = true;
2953                         break;
2954                 }
2955         }
2956
2957         if (team_linkup)
2958                 netif_carrier_on(team->dev);
2959         else
2960                 netif_carrier_off(team->dev);
2961 }
2962
2963 static void __team_port_change_check(struct team_port *port, bool linkup)
2964 {
2965         if (port->state.linkup != linkup)
2966                 __team_port_change_send(port, linkup);
2967         __team_carrier_check(port->team);
2968 }
2969
2970 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2971 {
2972         __team_port_change_send(port, linkup);
2973         __team_carrier_check(port->team);
2974 }
2975
2976 static void __team_port_change_port_removed(struct team_port *port)
2977 {
2978         port->removed = true;
2979         __team_port_change_send(port, false);
2980         __team_carrier_check(port->team);
2981 }
2982
2983 static void team_port_change_check(struct team_port *port, bool linkup)
2984 {
2985         struct team *team = port->team;
2986
2987         mutex_lock(&team->lock);
2988         __team_port_change_check(port, linkup);
2989         mutex_unlock(&team->lock);
2990 }
2991
2992
2993 /************************************
2994  * Net device notifier event handler
2995  ************************************/
2996
2997 static int team_device_event(struct notifier_block *unused,
2998                              unsigned long event, void *ptr)
2999 {
3000         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
3001         struct team_port *port;
3002
3003         port = team_port_get_rtnl(dev);
3004         if (!port)
3005                 return NOTIFY_DONE;
3006
3007         switch (event) {
3008         case NETDEV_UP:
3009                 if (netif_oper_up(dev))
3010                         team_port_change_check(port, true);
3011                 break;
3012         case NETDEV_DOWN:
3013                 team_port_change_check(port, false);
3014                 break;
3015         case NETDEV_CHANGE:
3016                 if (netif_running(port->dev))
3017                         team_port_change_check(port,
3018                                                !!netif_oper_up(port->dev));
3019                 break;
3020         case NETDEV_UNREGISTER:
3021                 team_del_slave(port->team->dev, dev);
3022                 break;
3023         case NETDEV_FEAT_CHANGE:
3024                 if (!port->team->notifier_ctx) {
3025                         port->team->notifier_ctx = true;
3026                         team_compute_features(port->team);
3027                         port->team->notifier_ctx = false;
3028                 }
3029                 break;
3030         case NETDEV_PRECHANGEMTU:
3031                 /* Forbid to change mtu of underlaying device */
3032                 if (!port->team->port_mtu_change_allowed)
3033                         return NOTIFY_BAD;
3034                 break;
3035         case NETDEV_PRE_TYPE_CHANGE:
3036                 /* Forbid to change type of underlaying device */
3037                 return NOTIFY_BAD;
3038         case NETDEV_RESEND_IGMP:
3039                 /* Propagate to master device */
3040                 call_netdevice_notifiers(event, port->team->dev);
3041                 break;
3042         }
3043         return NOTIFY_DONE;
3044 }
3045
3046 static struct notifier_block team_notifier_block __read_mostly = {
3047         .notifier_call = team_device_event,
3048 };
3049
3050
3051 /***********************
3052  * Module init and exit
3053  ***********************/
3054
3055 static int __init team_module_init(void)
3056 {
3057         int err;
3058
3059         register_netdevice_notifier(&team_notifier_block);
3060
3061         err = rtnl_link_register(&team_link_ops);
3062         if (err)
3063                 goto err_rtnl_reg;
3064
3065         err = team_nl_init();
3066         if (err)
3067                 goto err_nl_init;
3068
3069         return 0;
3070
3071 err_nl_init:
3072         rtnl_link_unregister(&team_link_ops);
3073
3074 err_rtnl_reg:
3075         unregister_netdevice_notifier(&team_notifier_block);
3076
3077         return err;
3078 }
3079
3080 static void __exit team_module_exit(void)
3081 {
3082         team_nl_fini();
3083         rtnl_link_unregister(&team_link_ops);
3084         unregister_netdevice_notifier(&team_notifier_block);
3085 }
3086
3087 module_init(team_module_init);
3088 module_exit(team_module_exit);
3089
3090 MODULE_LICENSE("GPL v2");
3091 MODULE_AUTHOR("Jiri Pirko <[email protected]>");
3092 MODULE_DESCRIPTION("Ethernet team device driver");
3093 MODULE_ALIAS_RTNL_LINK(DRV_NAME);