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 <linux/if_team.h>
  29
  30 #define DRV_NAME "team"
  31
  32
  33 /**********
  34  * Helpers
  35  **********/
  36
  37 static struct team_port *team_port_get_rtnl(const struct net_device *dev)
  38 {
  39         struct team_port *port = rtnl_dereference(dev->rx_handler_data);
  40
  41         return netif_is_team_port(dev) ? port : NULL;
  42 }
  43
  44 /*
  45  * Since the ability to change device address for open port device is tested in
  46  * team_port_add, this function can be called without control of return value
  47  */
  48 static int __set_port_dev_addr(struct net_device *port_dev,
  49                                const unsigned char *dev_addr)
  50 {
  51         struct sockaddr_storage addr;
  52
  53         memcpy(addr.__data, dev_addr, port_dev->addr_len);
  54         addr.ss_family = port_dev->type;
  55         return dev_set_mac_address(port_dev, (struct sockaddr *)&addr, NULL);
  56 }
  57
  58 static int team_port_set_orig_dev_addr(struct team_port *port)
  59 {
  60         return __set_port_dev_addr(port->dev, port->orig.dev_addr);
  61 }
  62
  63 static int team_port_set_team_dev_addr(struct team *team,
  64                                        struct team_port *port)
  65 {
  66         return __set_port_dev_addr(port->dev, team->dev->dev_addr);
  67 }
  68
  69 int team_modeop_port_enter(struct team *team, struct team_port *port)
  70 {
  71         return team_port_set_team_dev_addr(team, port);
  72 }
  73 EXPORT_SYMBOL(team_modeop_port_enter);
  74
  75 void team_modeop_port_change_dev_addr(struct team *team,
  76                                       struct team_port *port)
  77 {
  78         team_port_set_team_dev_addr(team, port);
  79 }
  80 EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
  81
  82 static void team_lower_state_changed(struct team_port *port)
  83 {
  84         struct netdev_lag_lower_state_info info;
  85
  86         info.link_up = port->linkup;
  87         info.tx_enabled = team_port_enabled(port);
  88         netdev_lower_state_changed(port->dev, &info);
  89 }
  90
  91 static void team_refresh_port_linkup(struct team_port *port)
  92 {
  93         bool new_linkup = port->user.linkup_enabled ? port->user.linkup :
  94                                                       port->state.linkup;
  95
  96         if (port->linkup != new_linkup) {
  97                 port->linkup = new_linkup;
  98                 team_lower_state_changed(port);
  99         }
 100 }
 101
 102
 103 /*******************
 104  * Options handling
 105  *******************/
 106
 107 struct team_option_inst { /* One for each option instance */
 108         struct list_head list;
 109         struct list_head tmp_list;
 110         struct team_option *option;
 111         struct team_option_inst_info info;
 112         bool changed;
 113         bool removed;
 114 };
 115
 116 static struct team_option *__team_find_option(struct team *team,
 117                                               const char *opt_name)
 118 {
 119         struct team_option *option;
 120
 121         list_for_each_entry(option, &team->option_list, list) {
 122                 if (strcmp(option->name, opt_name) == 0)
 123                         return option;
 124         }
 125         return NULL;
 126 }
 127
 128 static void __team_option_inst_del(struct team_option_inst *opt_inst)
 129 {
 130         list_del(&opt_inst->list);
 131         kfree(opt_inst);
 132 }
 133
 134 static void __team_option_inst_del_option(struct team *team,
 135                                           struct team_option *option)
 136 {
 137         struct team_option_inst *opt_inst, *tmp;
 138
 139         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 140                 if (opt_inst->option == option)
 141                         __team_option_inst_del(opt_inst);
 142         }
 143 }
 144
 145 static int __team_option_inst_add(struct team *team, struct team_option *option,
 146                                   struct team_port *port)
 147 {
 148         struct team_option_inst *opt_inst;
 149         unsigned int array_size;
 150         unsigned int i;
 151
 152         array_size = option->array_size;
 153         if (!array_size)
 154                 array_size = 1; /* No array but still need one instance */
 155
 156         for (i = 0; i < array_size; i++) {
 157                 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
 158                 if (!opt_inst)
 159                         return -ENOMEM;
 160                 opt_inst->option = option;
 161                 opt_inst->info.port = port;
 162                 opt_inst->info.array_index = i;
 163                 opt_inst->changed = true;
 164                 opt_inst->removed = false;
 165                 list_add_tail(&opt_inst->list, &team->option_inst_list);
 166                 if (option->init)
 167                         option->init(team, &opt_inst->info);
 168
 169         }
 170         return 0;
 171 }
 172
 173 static int __team_option_inst_add_option(struct team *team,
 174                                          struct team_option *option)
 175 {
 176         int err;
 177
 178         if (!option->per_port) {
 179                 err = __team_option_inst_add(team, option, NULL);
 180                 if (err)
 181                         goto inst_del_option;
 182         }
 183         return 0;
 184
 185 inst_del_option:
 186         __team_option_inst_del_option(team, option);
 187         return err;
 188 }
 189
 190 static void __team_option_inst_mark_removed_option(struct team *team,
 191                                                    struct team_option *option)
 192 {
 193         struct team_option_inst *opt_inst;
 194
 195         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 196                 if (opt_inst->option == option) {
 197                         opt_inst->changed = true;
 198                         opt_inst->removed = true;
 199                 }
 200         }
 201 }
 202
 203 static void __team_option_inst_del_port(struct team *team,
 204                                         struct team_port *port)
 205 {
 206         struct team_option_inst *opt_inst, *tmp;
 207
 208         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 209                 if (opt_inst->option->per_port &&
 210                     opt_inst->info.port == port)
 211                         __team_option_inst_del(opt_inst);
 212         }
 213 }
 214
 215 static int __team_option_inst_add_port(struct team *team,
 216                                        struct team_port *port)
 217 {
 218         struct team_option *option;
 219         int err;
 220
 221         list_for_each_entry(option, &team->option_list, list) {
 222                 if (!option->per_port)
 223                         continue;
 224                 err = __team_option_inst_add(team, option, port);
 225                 if (err)
 226                         goto inst_del_port;
 227         }
 228         return 0;
 229
 230 inst_del_port:
 231         __team_option_inst_del_port(team, port);
 232         return err;
 233 }
 234
 235 static void __team_option_inst_mark_removed_port(struct team *team,
 236                                                  struct team_port *port)
 237 {
 238         struct team_option_inst *opt_inst;
 239
 240         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 241                 if (opt_inst->info.port == port) {
 242                         opt_inst->changed = true;
 243                         opt_inst->removed = true;
 244                 }
 245         }
 246 }
 247
 248 static int __team_options_register(struct team *team,
 249                                    const struct team_option *option,
 250                                    size_t option_count)
 251 {
 252         int i;
 253         struct team_option **dst_opts;
 254         int err;
 255
 256         dst_opts = kcalloc(option_count, sizeof(struct team_option *),
 257                            GFP_KERNEL);
 258         if (!dst_opts)
 259                 return -ENOMEM;
 260         for (i = 0; i < option_count; i++, option++) {
 261                 if (__team_find_option(team, option->name)) {
 262                         err = -EEXIST;
 263                         goto alloc_rollback;
 264                 }
 265                 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
 266                 if (!dst_opts[i]) {
 267                         err = -ENOMEM;
 268                         goto alloc_rollback;
 269                 }
 270         }
 271
 272         for (i = 0; i < option_count; i++) {
 273                 err = __team_option_inst_add_option(team, dst_opts[i]);
 274                 if (err)
 275                         goto inst_rollback;
 276                 list_add_tail(&dst_opts[i]->list, &team->option_list);
 277         }
 278
 279         kfree(dst_opts);
 280         return 0;
 281
 282 inst_rollback:
 283         for (i--; i >= 0; i--) {
 284                 __team_option_inst_del_option(team, dst_opts[i]);
 285                 list_del(&dst_opts[i]->list);
 286         }
 287
 288         i = option_count;
 289 alloc_rollback:
 290         for (i--; i >= 0; i--)
 291                 kfree(dst_opts[i]);
 292
 293         kfree(dst_opts);
 294         return err;
 295 }
 296
 297 static void __team_options_mark_removed(struct team *team,
 298                                         const struct team_option *option,
 299                                         size_t option_count)
 300 {
 301         int i;
 302
 303         for (i = 0; i < option_count; i++, option++) {
 304                 struct team_option *del_opt;
 305
 306                 del_opt = __team_find_option(team, option->name);
 307                 if (del_opt)
 308                         __team_option_inst_mark_removed_option(team, del_opt);
 309         }
 310 }
 311
 312 static void __team_options_unregister(struct team *team,
 313                                       const struct team_option *option,
 314                                       size_t option_count)
 315 {
 316         int i;
 317
 318         for (i = 0; i < option_count; i++, option++) {
 319                 struct team_option *del_opt;
 320
 321                 del_opt = __team_find_option(team, option->name);
 322                 if (del_opt) {
 323                         __team_option_inst_del_option(team, del_opt);
 324                         list_del(&del_opt->list);
 325                         kfree(del_opt);
 326                 }
 327         }
 328 }
 329
 330 static void __team_options_change_check(struct team *team);
 331
 332 int team_options_register(struct team *team,
 333                           const struct team_option *option,
 334                           size_t option_count)
 335 {
 336         int err;
 337
 338         err = __team_options_register(team, option, option_count);
 339         if (err)
 340                 return err;
 341         __team_options_change_check(team);
 342         return 0;
 343 }
 344 EXPORT_SYMBOL(team_options_register);
 345
 346 void team_options_unregister(struct team *team,
 347                              const struct team_option *option,
 348                              size_t option_count)
 349 {
 350         __team_options_mark_removed(team, option, option_count);
 351         __team_options_change_check(team);
 352         __team_options_unregister(team, option, option_count);
 353 }
 354 EXPORT_SYMBOL(team_options_unregister);
 355
 356 static int team_option_get(struct team *team,
 357                            struct team_option_inst *opt_inst,
 358                            struct team_gsetter_ctx *ctx)
 359 {
 360         if (!opt_inst->option->getter)
 361                 return -EOPNOTSUPP;
 362
 363         opt_inst->option->getter(team, ctx);
 364         return 0;
 365 }
 366
 367 static int team_option_set(struct team *team,
 368                            struct team_option_inst *opt_inst,
 369                            struct team_gsetter_ctx *ctx)
 370 {
 371         if (!opt_inst->option->setter)
 372                 return -EOPNOTSUPP;
 373         return opt_inst->option->setter(team, ctx);
 374 }
 375
 376 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
 377 {
 378         struct team_option_inst *opt_inst;
 379
 380         opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
 381         opt_inst->changed = true;
 382 }
 383 EXPORT_SYMBOL(team_option_inst_set_change);
 384
 385 void team_options_change_check(struct team *team)
 386 {
 387         __team_options_change_check(team);
 388 }
 389 EXPORT_SYMBOL(team_options_change_check);
 390
 391
 392 /****************
 393  * Mode handling
 394  ****************/
 395
 396 static LIST_HEAD(mode_list);
 397 static DEFINE_SPINLOCK(mode_list_lock);
 398
 399 struct team_mode_item {
 400         struct list_head list;
 401         const struct team_mode *mode;
 402 };
 403
 404 static struct team_mode_item *__find_mode(const char *kind)
 405 {
 406         struct team_mode_item *mitem;
 407
 408         list_for_each_entry(mitem, &mode_list, list) {
 409                 if (strcmp(mitem->mode->kind, kind) == 0)
 410                         return mitem;
 411         }
 412         return NULL;
 413 }
 414
 415 static bool is_good_mode_name(const char *name)
 416 {
 417         while (*name != '\0') {
 418                 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
 419                         return false;
 420                 name++;
 421         }
 422         return true;
 423 }
 424
 425 int team_mode_register(const struct team_mode *mode)
 426 {
 427         int err = 0;
 428         struct team_mode_item *mitem;
 429
 430         if (!is_good_mode_name(mode->kind) ||
 431             mode->priv_size > TEAM_MODE_PRIV_SIZE)
 432                 return -EINVAL;
 433
 434         mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
 435         if (!mitem)
 436                 return -ENOMEM;
 437
 438         spin_lock(&mode_list_lock);
 439         if (__find_mode(mode->kind)) {
 440                 err = -EEXIST;
 441                 kfree(mitem);
 442                 goto unlock;
 443         }
 444         mitem->mode = mode;
 445         list_add_tail(&mitem->list, &mode_list);
 446 unlock:
 447         spin_unlock(&mode_list_lock);
 448         return err;
 449 }
 450 EXPORT_SYMBOL(team_mode_register);
 451
 452 void team_mode_unregister(const struct team_mode *mode)
 453 {
 454         struct team_mode_item *mitem;
 455
 456         spin_lock(&mode_list_lock);
 457         mitem = __find_mode(mode->kind);
 458         if (mitem) {
 459                 list_del_init(&mitem->list);
 460                 kfree(mitem);
 461         }
 462         spin_unlock(&mode_list_lock);
 463 }
 464 EXPORT_SYMBOL(team_mode_unregister);
 465
 466 static const struct team_mode *team_mode_get(const char *kind)
 467 {
 468         struct team_mode_item *mitem;
 469         const struct team_mode *mode = NULL;
 470
 471         if (!try_module_get(THIS_MODULE))
 472                 return NULL;
 473
 474         spin_lock(&mode_list_lock);
 475         mitem = __find_mode(kind);
 476         if (!mitem) {
 477                 spin_unlock(&mode_list_lock);
 478                 request_module("team-mode-%s", kind);
 479                 spin_lock(&mode_list_lock);
 480                 mitem = __find_mode(kind);
 481         }
 482         if (mitem) {
 483                 mode = mitem->mode;
 484                 if (!try_module_get(mode->owner))
 485                         mode = NULL;
 486         }
 487
 488         spin_unlock(&mode_list_lock);
 489         module_put(THIS_MODULE);
 490         return mode;
 491 }
 492
 493 static void team_mode_put(const struct team_mode *mode)
 494 {
 495         module_put(mode->owner);
 496 }
 497
 498 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
 499 {
 500         dev_kfree_skb_any(skb);
 501         return false;
 502 }
 503
 504 static rx_handler_result_t team_dummy_receive(struct team *team,
 505                                               struct team_port *port,
 506                                               struct sk_buff *skb)
 507 {
 508         return RX_HANDLER_ANOTHER;
 509 }
 510
 511 static const struct team_mode __team_no_mode = {
 512         .kind           = "*NOMODE*",
 513 };
 514
 515 static bool team_is_mode_set(struct team *team)
 516 {
 517         return team->mode != &__team_no_mode;
 518 }
 519
 520 static void team_set_no_mode(struct team *team)
 521 {
 522         team->user_carrier_enabled = false;
 523         team->mode = &__team_no_mode;
 524 }
 525
 526 static void team_adjust_ops(struct team *team)
 527 {
 528         /*
 529          * To avoid checks in rx/tx skb paths, ensure here that non-null and
 530          * correct ops are always set.
 531          */
 532
 533         if (!team->en_port_count || !team_is_mode_set(team) ||
 534             !team->mode->ops->transmit)
 535                 team->ops.transmit = team_dummy_transmit;
 536         else
 537                 team->ops.transmit = team->mode->ops->transmit;
 538
 539         if (!team->en_port_count || !team_is_mode_set(team) ||
 540             !team->mode->ops->receive)
 541                 team->ops.receive = team_dummy_receive;
 542         else
 543                 team->ops.receive = team->mode->ops->receive;
 544 }
 545
 546 /*
 547  * We can benefit from the fact that it's ensured no port is present
 548  * at the time of mode change. Therefore no packets are in fly so there's no
 549  * need to set mode operations in any special way.
 550  */
 551 static int __team_change_mode(struct team *team,
 552                               const struct team_mode *new_mode)
 553 {
 554         /* Check if mode was previously set and do cleanup if so */
 555         if (team_is_mode_set(team)) {
 556                 void (*exit_op)(struct team *team) = team->ops.exit;
 557
 558                 /* Clear ops area so no callback is called any longer */
 559                 memset(&team->ops, 0, sizeof(struct team_mode_ops));
 560                 team_adjust_ops(team);
 561
 562                 if (exit_op)
 563                         exit_op(team);
 564                 team_mode_put(team->mode);
 565                 team_set_no_mode(team);
 566                 /* zero private data area */
 567                 memset(&team->mode_priv, 0,
 568                        sizeof(struct team) - offsetof(struct team, mode_priv));
 569         }
 570
 571         if (!new_mode)
 572                 return 0;
 573
 574         if (new_mode->ops->init) {
 575                 int err;
 576
 577                 err = new_mode->ops->init(team);
 578                 if (err)
 579                         return err;
 580         }
 581
 582         team->mode = new_mode;
 583         memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
 584         team_adjust_ops(team);
 585
 586         return 0;
 587 }
 588
 589 static int team_change_mode(struct team *team, const char *kind)
 590 {
 591         const struct team_mode *new_mode;
 592         struct net_device *dev = team->dev;
 593         int err;
 594
 595         if (!list_empty(&team->port_list)) {
 596                 netdev_err(dev, "No ports can be present during mode change\n");
 597                 return -EBUSY;
 598         }
 599
 600         if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
 601                 netdev_err(dev, "Unable to change to the same mode the team is in\n");
 602                 return -EINVAL;
 603         }
 604
 605         new_mode = team_mode_get(kind);
 606         if (!new_mode) {
 607                 netdev_err(dev, "Mode \"%s\" not found\n", kind);
 608                 return -EINVAL;
 609         }
 610
 611         err = __team_change_mode(team, new_mode);
 612         if (err) {
 613                 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
 614                 team_mode_put(new_mode);
 615                 return err;
 616         }
 617
 618         netdev_info(dev, "Mode changed to \"%s\"\n", kind);
 619         return 0;
 620 }
 621
 622
 623 /*********************
 624  * Peers notification
 625  *********************/
 626
 627 static void team_notify_peers_work(struct work_struct *work)
 628 {
 629         struct team *team;
 630         int val;
 631
 632         team = container_of(work, struct team, notify_peers.dw.work);
 633
 634         if (!rtnl_trylock()) {
 635                 schedule_delayed_work(&team->notify_peers.dw, 0);
 636                 return;
 637         }
 638         val = atomic_dec_if_positive(&team->notify_peers.count_pending);
 639         if (val < 0) {
 640                 rtnl_unlock();
 641                 return;
 642         }
 643         call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
 644         rtnl_unlock();
 645         if (val)
 646                 schedule_delayed_work(&team->notify_peers.dw,
 647                                       msecs_to_jiffies(team->notify_peers.interval));
 648 }
 649
 650 static void team_notify_peers(struct team *team)
 651 {
 652         if (!team->notify_peers.count || !netif_running(team->dev))
 653                 return;
 654         atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
 655         schedule_delayed_work(&team->notify_peers.dw, 0);
 656 }
 657
 658 static void team_notify_peers_init(struct team *team)
 659 {
 660         INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
 661 }
 662
 663 static void team_notify_peers_fini(struct team *team)
 664 {
 665         cancel_delayed_work_sync(&team->notify_peers.dw);
 666 }
 667
 668
 669 /*******************************
 670  * Send multicast group rejoins
 671  *******************************/
 672
 673 static void team_mcast_rejoin_work(struct work_struct *work)
 674 {
 675         struct team *team;
 676         int val;
 677
 678         team = container_of(work, struct team, mcast_rejoin.dw.work);
 679
 680         if (!rtnl_trylock()) {
 681                 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 682                 return;
 683         }
 684         val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending);
 685         if (val < 0) {
 686                 rtnl_unlock();
 687                 return;
 688         }
 689         call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
 690         rtnl_unlock();
 691         if (val)
 692                 schedule_delayed_work(&team->mcast_rejoin.dw,
 693                                       msecs_to_jiffies(team->mcast_rejoin.interval));
 694 }
 695
 696 static void team_mcast_rejoin(struct team *team)
 697 {
 698         if (!team->mcast_rejoin.count || !netif_running(team->dev))
 699                 return;
 700         atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
 701         schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 702 }
 703
 704 static void team_mcast_rejoin_init(struct team *team)
 705 {
 706         INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
 707 }
 708
 709 static void team_mcast_rejoin_fini(struct team *team)
 710 {
 711         cancel_delayed_work_sync(&team->mcast_rejoin.dw);
 712 }
 713
 714
 715 /************************
 716  * Rx path frame handler
 717  ************************/
 718
 719 /* note: already called with rcu_read_lock */
 720 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
 721 {
 722         struct sk_buff *skb = *pskb;
 723         struct team_port *port;
 724         struct team *team;
 725         rx_handler_result_t res;
 726
 727         skb = skb_share_check(skb, GFP_ATOMIC);
 728         if (!skb)
 729                 return RX_HANDLER_CONSUMED;
 730
 731         *pskb = skb;
 732
 733         port = team_port_get_rcu(skb->dev);
 734         team = port->team;
 735         if (!team_port_enabled(port)) {
 736                 if (is_link_local_ether_addr(eth_hdr(skb)->h_dest))
 737                         /* link-local packets are mostly useful when stack receives them
 738                          * with the link they arrive on.
 739                          */
 740                         return RX_HANDLER_PASS;
 741                 /* allow exact match delivery for disabled ports */
 742                 res = RX_HANDLER_EXACT;
 743         } else {
 744                 res = team->ops.receive(team, port, skb);
 745         }
 746         if (res == RX_HANDLER_ANOTHER) {
 747                 struct team_pcpu_stats *pcpu_stats;
 748
 749                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
 750                 u64_stats_update_begin(&pcpu_stats->syncp);
 751                 u64_stats_inc(&pcpu_stats->rx_packets);
 752                 u64_stats_add(&pcpu_stats->rx_bytes, skb->len);
 753                 if (skb->pkt_type == PACKET_MULTICAST)
 754                         u64_stats_inc(&pcpu_stats->rx_multicast);
 755                 u64_stats_update_end(&pcpu_stats->syncp);
 756
 757                 skb->dev = team->dev;
 758         } else if (res == RX_HANDLER_EXACT) {
 759                 this_cpu_inc(team->pcpu_stats->rx_nohandler);
 760         } else {
 761                 this_cpu_inc(team->pcpu_stats->rx_dropped);
 762         }
 763
 764         return res;
 765 }
 766
 767
 768 /*************************************
 769  * Multiqueue Tx port select override
 770  *************************************/
 771
 772 static int team_queue_override_init(struct team *team)
 773 {
 774         struct list_head *listarr;
 775         unsigned int queue_cnt = team->dev->num_tx_queues - 1;
 776         unsigned int i;
 777
 778         if (!queue_cnt)
 779                 return 0;
 780         listarr = kmalloc_array(queue_cnt, sizeof(struct list_head),
 781                                 GFP_KERNEL);
 782         if (!listarr)
 783                 return -ENOMEM;
 784         team->qom_lists = listarr;
 785         for (i = 0; i < queue_cnt; i++)
 786                 INIT_LIST_HEAD(listarr++);
 787         return 0;
 788 }
 789
 790 static void team_queue_override_fini(struct team *team)
 791 {
 792         kfree(team->qom_lists);
 793 }
 794
 795 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
 796 {
 797         return &team->qom_lists[queue_id - 1];
 798 }
 799
 800 /*
 801  * note: already called with rcu_read_lock
 802  */
 803 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
 804 {
 805         struct list_head *qom_list;
 806         struct team_port *port;
 807
 808         if (!team->queue_override_enabled || !skb->queue_mapping)
 809                 return false;
 810         qom_list = __team_get_qom_list(team, skb->queue_mapping);
 811         list_for_each_entry_rcu(port, qom_list, qom_list) {
 812                 if (!team_dev_queue_xmit(team, port, skb))
 813                         return true;
 814         }
 815         return false;
 816 }
 817
 818 static void __team_queue_override_port_del(struct team *team,
 819                                            struct team_port *port)
 820 {
 821         if (!port->queue_id)
 822                 return;
 823         list_del_rcu(&port->qom_list);
 824 }
 825
 826 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
 827                                                       struct team_port *cur)
 828 {
 829         if (port->priority < cur->priority)
 830                 return true;
 831         if (port->priority > cur->priority)
 832                 return false;
 833         if (port->index < cur->index)
 834                 return true;
 835         return false;
 836 }
 837
 838 static void __team_queue_override_port_add(struct team *team,
 839                                            struct team_port *port)
 840 {
 841         struct team_port *cur;
 842         struct list_head *qom_list;
 843         struct list_head *node;
 844
 845         if (!port->queue_id)
 846                 return;
 847         qom_list = __team_get_qom_list(team, port->queue_id);
 848         node = qom_list;
 849         list_for_each_entry(cur, qom_list, qom_list) {
 850                 if (team_queue_override_port_has_gt_prio_than(port, cur))
 851                         break;
 852                 node = &cur->qom_list;
 853         }
 854         list_add_tail_rcu(&port->qom_list, node);
 855 }
 856
 857 static void __team_queue_override_enabled_check(struct team *team)
 858 {
 859         struct team_port *port;
 860         bool enabled = false;
 861
 862         list_for_each_entry(port, &team->port_list, list) {
 863                 if (port->queue_id) {
 864                         enabled = true;
 865                         break;
 866                 }
 867         }
 868         if (enabled == team->queue_override_enabled)
 869                 return;
 870         netdev_dbg(team->dev, "%s queue override\n",
 871                    enabled ? "Enabling" : "Disabling");
 872         team->queue_override_enabled = enabled;
 873 }
 874
 875 static void team_queue_override_port_prio_changed(struct team *team,
 876                                                   struct team_port *port)
 877 {
 878         if (!port->queue_id || team_port_enabled(port))
 879                 return;
 880         __team_queue_override_port_del(team, port);
 881         __team_queue_override_port_add(team, port);
 882         __team_queue_override_enabled_check(team);
 883 }
 884
 885 static void team_queue_override_port_change_queue_id(struct team *team,
 886                                                      struct team_port *port,
 887                                                      u16 new_queue_id)
 888 {
 889         if (team_port_enabled(port)) {
 890                 __team_queue_override_port_del(team, port);
 891                 port->queue_id = new_queue_id;
 892                 __team_queue_override_port_add(team, port);
 893                 __team_queue_override_enabled_check(team);
 894         } else {
 895                 port->queue_id = new_queue_id;
 896         }
 897 }
 898
 899 static void team_queue_override_port_add(struct team *team,
 900                                          struct team_port *port)
 901 {
 902         __team_queue_override_port_add(team, port);
 903         __team_queue_override_enabled_check(team);
 904 }
 905
 906 static void team_queue_override_port_del(struct team *team,
 907                                          struct team_port *port)
 908 {
 909         __team_queue_override_port_del(team, port);
 910         __team_queue_override_enabled_check(team);
 911 }
 912
 913
 914 /****************
 915  * Port handling
 916  ****************/
 917
 918 static bool team_port_find(const struct team *team,
 919                            const struct team_port *port)
 920 {
 921         struct team_port *cur;
 922
 923         list_for_each_entry(cur, &team->port_list, list)
 924                 if (cur == port)
 925                         return true;
 926         return false;
 927 }
 928
 929 /*
 930  * Enable/disable port by adding to enabled port hashlist and setting
 931  * port->index (Might be racy so reader could see incorrect ifindex when
 932  * processing a flying packet, but that is not a problem). Write guarded
 933  * by team->lock.
 934  */
 935 static void team_port_enable(struct team *team,
 936                              struct team_port *port)
 937 {
 938         if (team_port_enabled(port))
 939                 return;
 940         port->index = team->en_port_count++;
 941         hlist_add_head_rcu(&port->hlist,
 942                            team_port_index_hash(team, port->index));
 943         team_adjust_ops(team);
 944         team_queue_override_port_add(team, port);
 945         if (team->ops.port_enabled)
 946                 team->ops.port_enabled(team, port);
 947         team_notify_peers(team);
 948         team_mcast_rejoin(team);
 949         team_lower_state_changed(port);
 950 }
 951
 952 static void __reconstruct_port_hlist(struct team *team, int rm_index)
 953 {
 954         int i;
 955         struct team_port *port;
 956
 957         for (i = rm_index + 1; i < team->en_port_count; i++) {
 958                 port = team_get_port_by_index(team, i);
 959                 hlist_del_rcu(&port->hlist);
 960                 port->index--;
 961                 hlist_add_head_rcu(&port->hlist,
 962                                    team_port_index_hash(team, port->index));
 963         }
 964 }
 965
 966 static void team_port_disable(struct team *team,
 967                               struct team_port *port)
 968 {
 969         if (!team_port_enabled(port))
 970                 return;
 971         if (team->ops.port_disabled)
 972                 team->ops.port_disabled(team, port);
 973         hlist_del_rcu(&port->hlist);
 974         __reconstruct_port_hlist(team, port->index);
 975         port->index = -1;
 976         team->en_port_count--;
 977         team_queue_override_port_del(team, port);
 978         team_adjust_ops(team);
 979         team_lower_state_changed(port);
 980 }
 981
 982 #define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
 983                             NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE | \
 984                             NETIF_F_HIGHDMA | NETIF_F_LRO)
 985
 986 #define TEAM_ENC_FEATURES       (NETIF_F_HW_CSUM | NETIF_F_SG | \
 987                                  NETIF_F_RXCSUM | NETIF_F_GSO_SOFTWARE)
 988
 989 static void __team_compute_features(struct team *team)
 990 {
 991         struct team_port *port;
 992         netdev_features_t vlan_features = TEAM_VLAN_FEATURES &
 993                                           NETIF_F_ALL_FOR_ALL;
 994         netdev_features_t enc_features  = TEAM_ENC_FEATURES;
 995         unsigned short max_hard_header_len = ETH_HLEN;
 996         unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
 997                                         IFF_XMIT_DST_RELEASE_PERM;
 998
 999         rcu_read_lock();
1000         list_for_each_entry_rcu(port, &team->port_list, list) {
1001                 vlan_features = netdev_increment_features(vlan_features,
1002                                         port->dev->vlan_features,
1003                                         TEAM_VLAN_FEATURES);
1004                 enc_features =
1005                         netdev_increment_features(enc_features,
1006                                                   port->dev->hw_enc_features,
1007                                                   TEAM_ENC_FEATURES);
1008
1009
1010                 dst_release_flag &= port->dev->priv_flags;
1011                 if (port->dev->hard_header_len > max_hard_header_len)
1012                         max_hard_header_len = port->dev->hard_header_len;
1013         }
1014         rcu_read_unlock();
1015
1016         team->dev->vlan_features = vlan_features;
1017         team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL |
1018                                      NETIF_F_HW_VLAN_CTAG_TX |
1019                                      NETIF_F_HW_VLAN_STAG_TX;
1020         team->dev->hard_header_len = max_hard_header_len;
1021
1022         team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1023         if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1024                 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1025 }
1026
1027 static void team_compute_features(struct team *team)
1028 {
1029         __team_compute_features(team);
1030         netdev_change_features(team->dev);
1031 }
1032
1033 static int team_port_enter(struct team *team, struct team_port *port)
1034 {
1035         int err = 0;
1036
1037         dev_hold(team->dev);
1038         if (team->ops.port_enter) {
1039                 err = team->ops.port_enter(team, port);
1040                 if (err) {
1041                         netdev_err(team->dev, "Device %s failed to enter team mode\n",
1042                                    port->dev->name);
1043                         goto err_port_enter;
1044                 }
1045         }
1046
1047         return 0;
1048
1049 err_port_enter:
1050         dev_put(team->dev);
1051
1052         return err;
1053 }
1054
1055 static void team_port_leave(struct team *team, struct team_port *port)
1056 {
1057         if (team->ops.port_leave)
1058                 team->ops.port_leave(team, port);
1059         dev_put(team->dev);
1060 }
1061
1062 #ifdef CONFIG_NET_POLL_CONTROLLER
1063 static int __team_port_enable_netpoll(struct team_port *port)
1064 {
1065         struct netpoll *np;
1066         int err;
1067
1068         np = kzalloc(sizeof(*np), GFP_KERNEL);
1069         if (!np)
1070                 return -ENOMEM;
1071
1072         err = __netpoll_setup(np, port->dev);
1073         if (err) {
1074                 kfree(np);
1075                 return err;
1076         }
1077         port->np = np;
1078         return err;
1079 }
1080
1081 static int team_port_enable_netpoll(struct team_port *port)
1082 {
1083         if (!port->team->dev->npinfo)
1084                 return 0;
1085
1086         return __team_port_enable_netpoll(port);
1087 }
1088
1089 static void team_port_disable_netpoll(struct team_port *port)
1090 {
1091         struct netpoll *np = port->np;
1092
1093         if (!np)
1094                 return;
1095         port->np = NULL;
1096
1097         __netpoll_free(np);
1098 }
1099 #else
1100 static int team_port_enable_netpoll(struct team_port *port)
1101 {
1102         return 0;
1103 }
1104 static void team_port_disable_netpoll(struct team_port *port)
1105 {
1106 }
1107 #endif
1108
1109 static int team_upper_dev_link(struct team *team, struct team_port *port,
1110                                struct netlink_ext_ack *extack)
1111 {
1112         struct netdev_lag_upper_info lag_upper_info;
1113         int err;
1114
1115         lag_upper_info.tx_type = team->mode->lag_tx_type;
1116         lag_upper_info.hash_type = NETDEV_LAG_HASH_UNKNOWN;
1117         err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1118                                            &lag_upper_info, extack);
1119         if (err)
1120                 return err;
1121         port->dev->priv_flags |= IFF_TEAM_PORT;
1122         return 0;
1123 }
1124
1125 static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1126 {
1127         netdev_upper_dev_unlink(port->dev, team->dev);
1128         port->dev->priv_flags &= ~IFF_TEAM_PORT;
1129 }
1130
1131 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1132 static int team_dev_type_check_change(struct net_device *dev,
1133                                       struct net_device *port_dev);
1134
1135 static int team_port_add(struct team *team, struct net_device *port_dev,
1136                          struct netlink_ext_ack *extack)
1137 {
1138         struct net_device *dev = team->dev;
1139         struct team_port *port;
1140         char *portname = port_dev->name;
1141         int err;
1142
1143         if (port_dev->flags & IFF_LOOPBACK) {
1144                 NL_SET_ERR_MSG(extack, "Loopback device can't be added as a team port");
1145                 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1146                            portname);
1147                 return -EINVAL;
1148         }
1149
1150         if (netif_is_team_port(port_dev)) {
1151                 NL_SET_ERR_MSG(extack, "Device is already a port of a team device");
1152                 netdev_err(dev, "Device %s is already a port "
1153                                 "of a team device\n", portname);
1154                 return -EBUSY;
1155         }
1156
1157         if (dev == port_dev) {
1158                 NL_SET_ERR_MSG(extack, "Cannot enslave team device to itself");
1159                 netdev_err(dev, "Cannot enslave team device to itself\n");
1160                 return -EINVAL;
1161         }
1162
1163         if (netdev_has_upper_dev(dev, port_dev)) {
1164                 NL_SET_ERR_MSG(extack, "Device is already an upper device of the team interface");
1165                 netdev_err(dev, "Device %s is already an upper device of the team interface\n",
1166                            portname);
1167                 return -EBUSY;
1168         }
1169
1170         if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1171             vlan_uses_dev(dev)) {
1172                 NL_SET_ERR_MSG(extack, "Device is VLAN challenged and team device has VLAN set up");
1173                 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1174                            portname);
1175                 return -EPERM;
1176         }
1177
1178         err = team_dev_type_check_change(dev, port_dev);
1179         if (err)
1180                 return err;
1181
1182         if (port_dev->flags & IFF_UP) {
1183                 NL_SET_ERR_MSG(extack, "Device is up. Set it down before adding it as a team port");
1184                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1185                            portname);
1186                 return -EBUSY;
1187         }
1188
1189         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1190                        GFP_KERNEL);
1191         if (!port)
1192                 return -ENOMEM;
1193
1194         port->dev = port_dev;
1195         port->team = team;
1196         INIT_LIST_HEAD(&port->qom_list);
1197
1198         port->orig.mtu = port_dev->mtu;
1199         err = dev_set_mtu(port_dev, dev->mtu);
1200         if (err) {
1201                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1202                 goto err_set_mtu;
1203         }
1204
1205         memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1206
1207         err = team_port_enter(team, port);
1208         if (err) {
1209                 netdev_err(dev, "Device %s failed to enter team mode\n",
1210                            portname);
1211                 goto err_port_enter;
1212         }
1213
1214         err = dev_open(port_dev, extack);
1215         if (err) {
1216                 netdev_dbg(dev, "Device %s opening failed\n",
1217                            portname);
1218                 goto err_dev_open;
1219         }
1220
1221         err = vlan_vids_add_by_dev(port_dev, dev);
1222         if (err) {
1223                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1224                                 portname);
1225                 goto err_vids_add;
1226         }
1227
1228         err = team_port_enable_netpoll(port);
1229         if (err) {
1230                 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1231                            portname);
1232                 goto err_enable_netpoll;
1233         }
1234
1235         if (!(dev->features & NETIF_F_LRO))
1236                 dev_disable_lro(port_dev);
1237
1238         err = netdev_rx_handler_register(port_dev, team_handle_frame,
1239                                          port);
1240         if (err) {
1241                 netdev_err(dev, "Device %s failed to register rx_handler\n",
1242                            portname);
1243                 goto err_handler_register;
1244         }
1245
1246         err = team_upper_dev_link(team, port, extack);
1247         if (err) {
1248                 netdev_err(dev, "Device %s failed to set upper link\n",
1249                            portname);
1250                 goto err_set_upper_link;
1251         }
1252
1253         err = __team_option_inst_add_port(team, port);
1254         if (err) {
1255                 netdev_err(dev, "Device %s failed to add per-port options\n",
1256                            portname);
1257                 goto err_option_port_add;
1258         }
1259
1260         /* set promiscuity level to new slave */
1261         if (dev->flags & IFF_PROMISC) {
1262                 err = dev_set_promiscuity(port_dev, 1);
1263                 if (err)
1264                         goto err_set_slave_promisc;
1265         }
1266
1267         /* set allmulti level to new slave */
1268         if (dev->flags & IFF_ALLMULTI) {
1269                 err = dev_set_allmulti(port_dev, 1);
1270                 if (err) {
1271                         if (dev->flags & IFF_PROMISC)
1272                                 dev_set_promiscuity(port_dev, -1);
1273                         goto err_set_slave_promisc;
1274                 }
1275         }
1276
1277         if (dev->flags & IFF_UP) {
1278                 netif_addr_lock_bh(dev);
1279                 dev_uc_sync_multiple(port_dev, dev);
1280                 dev_mc_sync_multiple(port_dev, dev);
1281                 netif_addr_unlock_bh(dev);
1282         }
1283
1284         port->index = -1;
1285         list_add_tail_rcu(&port->list, &team->port_list);
1286         team_port_enable(team, port);
1287         __team_compute_features(team);
1288         __team_port_change_port_added(port, !!netif_oper_up(port_dev));
1289         __team_options_change_check(team);
1290
1291         netdev_info(dev, "Port device %s added\n", portname);
1292
1293         return 0;
1294
1295 err_set_slave_promisc:
1296         __team_option_inst_del_port(team, port);
1297
1298 err_option_port_add:
1299         team_upper_dev_unlink(team, port);
1300
1301 err_set_upper_link:
1302         netdev_rx_handler_unregister(port_dev);
1303
1304 err_handler_register:
1305         team_port_disable_netpoll(port);
1306
1307 err_enable_netpoll:
1308         vlan_vids_del_by_dev(port_dev, dev);
1309
1310 err_vids_add:
1311         dev_close(port_dev);
1312
1313 err_dev_open:
1314         team_port_leave(team, port);
1315         team_port_set_orig_dev_addr(port);
1316
1317 err_port_enter:
1318         dev_set_mtu(port_dev, port->orig.mtu);
1319
1320 err_set_mtu:
1321         kfree(port);
1322
1323         return err;
1324 }
1325
1326 static void __team_port_change_port_removed(struct team_port *port);
1327
1328 static int team_port_del(struct team *team, struct net_device *port_dev)
1329 {
1330         struct net_device *dev = team->dev;
1331         struct team_port *port;
1332         char *portname = port_dev->name;
1333
1334         port = team_port_get_rtnl(port_dev);
1335         if (!port || !team_port_find(team, port)) {
1336                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1337                            portname);
1338                 return -ENOENT;
1339         }
1340
1341         team_port_disable(team, port);
1342         list_del_rcu(&port->list);
1343
1344         if (dev->flags & IFF_PROMISC)
1345                 dev_set_promiscuity(port_dev, -1);
1346         if (dev->flags & IFF_ALLMULTI)
1347                 dev_set_allmulti(port_dev, -1);
1348
1349         team_upper_dev_unlink(team, port);
1350         netdev_rx_handler_unregister(port_dev);
1351         team_port_disable_netpoll(port);
1352         vlan_vids_del_by_dev(port_dev, dev);
1353         if (dev->flags & IFF_UP) {
1354                 dev_uc_unsync(port_dev, dev);
1355                 dev_mc_unsync(port_dev, dev);
1356         }
1357         dev_close(port_dev);
1358         team_port_leave(team, port);
1359
1360         __team_option_inst_mark_removed_port(team, port);
1361         __team_options_change_check(team);
1362         __team_option_inst_del_port(team, port);
1363         __team_port_change_port_removed(port);
1364
1365         team_port_set_orig_dev_addr(port);
1366         dev_set_mtu(port_dev, port->orig.mtu);
1367         kfree_rcu(port, rcu);
1368         netdev_info(dev, "Port device %s removed\n", portname);
1369         __team_compute_features(team);
1370
1371         return 0;
1372 }
1373
1374
1375 /*****************
1376  * Net device ops
1377  *****************/
1378
1379 static void team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1380 {
1381         ctx->data.str_val = team->mode->kind;
1382 }
1383
1384 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1385 {
1386         return team_change_mode(team, ctx->data.str_val);
1387 }
1388
1389 static void team_notify_peers_count_get(struct team *team,
1390                                         struct team_gsetter_ctx *ctx)
1391 {
1392         ctx->data.u32_val = team->notify_peers.count;
1393 }
1394
1395 static int team_notify_peers_count_set(struct team *team,
1396                                        struct team_gsetter_ctx *ctx)
1397 {
1398         team->notify_peers.count = ctx->data.u32_val;
1399         return 0;
1400 }
1401
1402 static void team_notify_peers_interval_get(struct team *team,
1403                                            struct team_gsetter_ctx *ctx)
1404 {
1405         ctx->data.u32_val = team->notify_peers.interval;
1406 }
1407
1408 static int team_notify_peers_interval_set(struct team *team,
1409                                           struct team_gsetter_ctx *ctx)
1410 {
1411         team->notify_peers.interval = ctx->data.u32_val;
1412         return 0;
1413 }
1414
1415 static void team_mcast_rejoin_count_get(struct team *team,
1416                                         struct team_gsetter_ctx *ctx)
1417 {
1418         ctx->data.u32_val = team->mcast_rejoin.count;
1419 }
1420
1421 static int team_mcast_rejoin_count_set(struct team *team,
1422                                        struct team_gsetter_ctx *ctx)
1423 {
1424         team->mcast_rejoin.count = ctx->data.u32_val;
1425         return 0;
1426 }
1427
1428 static void team_mcast_rejoin_interval_get(struct team *team,
1429                                            struct team_gsetter_ctx *ctx)
1430 {
1431         ctx->data.u32_val = team->mcast_rejoin.interval;
1432 }
1433
1434 static int team_mcast_rejoin_interval_set(struct team *team,
1435                                           struct team_gsetter_ctx *ctx)
1436 {
1437         team->mcast_rejoin.interval = ctx->data.u32_val;
1438         return 0;
1439 }
1440
1441 static void team_port_en_option_get(struct team *team,
1442                                     struct team_gsetter_ctx *ctx)
1443 {
1444         struct team_port *port = ctx->info->port;
1445
1446         ctx->data.bool_val = team_port_enabled(port);
1447 }
1448
1449 static int team_port_en_option_set(struct team *team,
1450                                    struct team_gsetter_ctx *ctx)
1451 {
1452         struct team_port *port = ctx->info->port;
1453
1454         if (ctx->data.bool_val)
1455                 team_port_enable(team, port);
1456         else
1457                 team_port_disable(team, port);
1458         return 0;
1459 }
1460
1461 static void team_user_linkup_option_get(struct team *team,
1462                                         struct team_gsetter_ctx *ctx)
1463 {
1464         struct team_port *port = ctx->info->port;
1465
1466         ctx->data.bool_val = port->user.linkup;
1467 }
1468
1469 static void __team_carrier_check(struct team *team);
1470
1471 static int team_user_linkup_option_set(struct team *team,
1472                                        struct team_gsetter_ctx *ctx)
1473 {
1474         struct team_port *port = ctx->info->port;
1475
1476         port->user.linkup = ctx->data.bool_val;
1477         team_refresh_port_linkup(port);
1478         __team_carrier_check(port->team);
1479         return 0;
1480 }
1481
1482 static void team_user_linkup_en_option_get(struct team *team,
1483                                            struct team_gsetter_ctx *ctx)
1484 {
1485         struct team_port *port = ctx->info->port;
1486
1487         ctx->data.bool_val = port->user.linkup_enabled;
1488 }
1489
1490 static int team_user_linkup_en_option_set(struct team *team,
1491                                           struct team_gsetter_ctx *ctx)
1492 {
1493         struct team_port *port = ctx->info->port;
1494
1495         port->user.linkup_enabled = ctx->data.bool_val;
1496         team_refresh_port_linkup(port);
1497         __team_carrier_check(port->team);
1498         return 0;
1499 }
1500
1501 static void team_priority_option_get(struct team *team,
1502                                      struct team_gsetter_ctx *ctx)
1503 {
1504         struct team_port *port = ctx->info->port;
1505
1506         ctx->data.s32_val = port->priority;
1507 }
1508
1509 static int team_priority_option_set(struct team *team,
1510                                     struct team_gsetter_ctx *ctx)
1511 {
1512         struct team_port *port = ctx->info->port;
1513         s32 priority = ctx->data.s32_val;
1514
1515         if (port->priority == priority)
1516                 return 0;
1517         port->priority = priority;
1518         team_queue_override_port_prio_changed(team, port);
1519         return 0;
1520 }
1521
1522 static void team_queue_id_option_get(struct team *team,
1523                                      struct team_gsetter_ctx *ctx)
1524 {
1525         struct team_port *port = ctx->info->port;
1526
1527         ctx->data.u32_val = port->queue_id;
1528 }
1529
1530 static int team_queue_id_option_set(struct team *team,
1531                                     struct team_gsetter_ctx *ctx)
1532 {
1533         struct team_port *port = ctx->info->port;
1534         u16 new_queue_id = ctx->data.u32_val;
1535
1536         if (port->queue_id == new_queue_id)
1537                 return 0;
1538         if (new_queue_id >= team->dev->real_num_tx_queues)
1539                 return -EINVAL;
1540         team_queue_override_port_change_queue_id(team, port, new_queue_id);
1541         return 0;
1542 }
1543
1544 static const struct team_option team_options[] = {
1545         {
1546                 .name = "mode",
1547                 .type = TEAM_OPTION_TYPE_STRING,
1548                 .getter = team_mode_option_get,
1549                 .setter = team_mode_option_set,
1550         },
1551         {
1552                 .name = "notify_peers_count",
1553                 .type = TEAM_OPTION_TYPE_U32,
1554                 .getter = team_notify_peers_count_get,
1555                 .setter = team_notify_peers_count_set,
1556         },
1557         {
1558                 .name = "notify_peers_interval",
1559                 .type = TEAM_OPTION_TYPE_U32,
1560                 .getter = team_notify_peers_interval_get,
1561                 .setter = team_notify_peers_interval_set,
1562         },
1563         {
1564                 .name = "mcast_rejoin_count",
1565                 .type = TEAM_OPTION_TYPE_U32,
1566                 .getter = team_mcast_rejoin_count_get,
1567                 .setter = team_mcast_rejoin_count_set,
1568         },
1569         {
1570                 .name = "mcast_rejoin_interval",
1571                 .type = TEAM_OPTION_TYPE_U32,
1572                 .getter = team_mcast_rejoin_interval_get,
1573                 .setter = team_mcast_rejoin_interval_set,
1574         },
1575         {
1576                 .name = "enabled",
1577                 .type = TEAM_OPTION_TYPE_BOOL,
1578                 .per_port = true,
1579                 .getter = team_port_en_option_get,
1580                 .setter = team_port_en_option_set,
1581         },
1582         {
1583                 .name = "user_linkup",
1584                 .type = TEAM_OPTION_TYPE_BOOL,
1585                 .per_port = true,
1586                 .getter = team_user_linkup_option_get,
1587                 .setter = team_user_linkup_option_set,
1588         },
1589         {
1590                 .name = "user_linkup_enabled",
1591                 .type = TEAM_OPTION_TYPE_BOOL,
1592                 .per_port = true,
1593                 .getter = team_user_linkup_en_option_get,
1594                 .setter = team_user_linkup_en_option_set,
1595         },
1596         {
1597                 .name = "priority",
1598                 .type = TEAM_OPTION_TYPE_S32,
1599                 .per_port = true,
1600                 .getter = team_priority_option_get,
1601                 .setter = team_priority_option_set,
1602         },
1603         {
1604                 .name = "queue_id",
1605                 .type = TEAM_OPTION_TYPE_U32,
1606                 .per_port = true,
1607                 .getter = team_queue_id_option_get,
1608                 .setter = team_queue_id_option_set,
1609         },
1610 };
1611
1612
1613 static int team_init(struct net_device *dev)
1614 {
1615         struct team *team = netdev_priv(dev);
1616         int i;
1617         int err;
1618
1619         team->dev = dev;
1620         team_set_no_mode(team);
1621         team->notifier_ctx = false;
1622
1623         team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1624         if (!team->pcpu_stats)
1625                 return -ENOMEM;
1626
1627         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1628                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1629         INIT_LIST_HEAD(&team->port_list);
1630         err = team_queue_override_init(team);
1631         if (err)
1632                 goto err_team_queue_override_init;
1633
1634         team_adjust_ops(team);
1635
1636         INIT_LIST_HEAD(&team->option_list);
1637         INIT_LIST_HEAD(&team->option_inst_list);
1638
1639         team_notify_peers_init(team);
1640         team_mcast_rejoin_init(team);
1641
1642         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1643         if (err)
1644                 goto err_options_register;
1645         netif_carrier_off(dev);
1646
1647         lockdep_register_key(&team->team_lock_key);
1648         __mutex_init(&team->lock, "team->team_lock_key", &team->team_lock_key);
1649         netdev_lockdep_set_classes(dev);
1650
1651         return 0;
1652
1653 err_options_register:
1654         team_mcast_rejoin_fini(team);
1655         team_notify_peers_fini(team);
1656         team_queue_override_fini(team);
1657 err_team_queue_override_init:
1658         free_percpu(team->pcpu_stats);
1659
1660         return err;
1661 }
1662
1663 static void team_uninit(struct net_device *dev)
1664 {
1665         struct team *team = netdev_priv(dev);
1666         struct team_port *port;
1667         struct team_port *tmp;
1668
1669         mutex_lock(&team->lock);
1670         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1671                 team_port_del(team, port->dev);
1672
1673         __team_change_mode(team, NULL); /* cleanup */
1674         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1675         team_mcast_rejoin_fini(team);
1676         team_notify_peers_fini(team);
1677         team_queue_override_fini(team);
1678         mutex_unlock(&team->lock);
1679         netdev_change_features(dev);
1680         lockdep_unregister_key(&team->team_lock_key);
1681 }
1682
1683 static void team_destructor(struct net_device *dev)
1684 {
1685         struct team *team = netdev_priv(dev);
1686
1687         free_percpu(team->pcpu_stats);
1688 }
1689
1690 static int team_open(struct net_device *dev)
1691 {
1692         return 0;
1693 }
1694
1695 static int team_close(struct net_device *dev)
1696 {
1697         struct team *team = netdev_priv(dev);
1698         struct team_port *port;
1699
1700         list_for_each_entry(port, &team->port_list, list) {
1701                 dev_uc_unsync(port->dev, dev);
1702                 dev_mc_unsync(port->dev, dev);
1703         }
1704
1705         return 0;
1706 }
1707
1708 /*
1709  * note: already called with rcu_read_lock
1710  */
1711 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1712 {
1713         struct team *team = netdev_priv(dev);
1714         bool tx_success;
1715         unsigned int len = skb->len;
1716
1717         tx_success = team_queue_override_transmit(team, skb);
1718         if (!tx_success)
1719                 tx_success = team->ops.transmit(team, skb);
1720         if (tx_success) {
1721                 struct team_pcpu_stats *pcpu_stats;
1722
1723                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1724                 u64_stats_update_begin(&pcpu_stats->syncp);
1725                 u64_stats_inc(&pcpu_stats->tx_packets);
1726                 u64_stats_add(&pcpu_stats->tx_bytes, len);
1727                 u64_stats_update_end(&pcpu_stats->syncp);
1728         } else {
1729                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1730         }
1731
1732         return NETDEV_TX_OK;
1733 }
1734
1735 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1736                              struct net_device *sb_dev)
1737 {
1738         /*
1739          * This helper function exists to help dev_pick_tx get the correct
1740          * destination queue.  Using a helper function skips a call to
1741          * skb_tx_hash and will put the skbs in the queue we expect on their
1742          * way down to the team driver.
1743          */
1744         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1745
1746         /*
1747          * Save the original txq to restore before passing to the driver
1748          */
1749         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1750
1751         if (unlikely(txq >= dev->real_num_tx_queues)) {
1752                 do {
1753                         txq -= dev->real_num_tx_queues;
1754                 } while (txq >= dev->real_num_tx_queues);
1755         }
1756         return txq;
1757 }
1758
1759 static void team_change_rx_flags(struct net_device *dev, int change)
1760 {
1761         struct team *team = netdev_priv(dev);
1762         struct team_port *port;
1763         int inc;
1764
1765         rcu_read_lock();
1766         list_for_each_entry_rcu(port, &team->port_list, list) {
1767                 if (change & IFF_PROMISC) {
1768                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1769                         dev_set_promiscuity(port->dev, inc);
1770                 }
1771                 if (change & IFF_ALLMULTI) {
1772                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1773                         dev_set_allmulti(port->dev, inc);
1774                 }
1775         }
1776         rcu_read_unlock();
1777 }
1778
1779 static void team_set_rx_mode(struct net_device *dev)
1780 {
1781         struct team *team = netdev_priv(dev);
1782         struct team_port *port;
1783
1784         rcu_read_lock();
1785         list_for_each_entry_rcu(port, &team->port_list, list) {
1786                 dev_uc_sync_multiple(port->dev, dev);
1787                 dev_mc_sync_multiple(port->dev, dev);
1788         }
1789         rcu_read_unlock();
1790 }
1791
1792 static int team_set_mac_address(struct net_device *dev, void *p)
1793 {
1794         struct sockaddr *addr = p;
1795         struct team *team = netdev_priv(dev);
1796         struct team_port *port;
1797
1798         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1799                 return -EADDRNOTAVAIL;
1800         dev_addr_set(dev, addr->sa_data);
1801         mutex_lock(&team->lock);
1802         list_for_each_entry(port, &team->port_list, list)
1803                 if (team->ops.port_change_dev_addr)
1804                         team->ops.port_change_dev_addr(team, port);
1805         mutex_unlock(&team->lock);
1806         return 0;
1807 }
1808
1809 static int team_change_mtu(struct net_device *dev, int new_mtu)
1810 {
1811         struct team *team = netdev_priv(dev);
1812         struct team_port *port;
1813         int err;
1814
1815         /*
1816          * Alhough this is reader, it's guarded by team lock. It's not possible
1817          * to traverse list in reverse under rcu_read_lock
1818          */
1819         mutex_lock(&team->lock);
1820         team->port_mtu_change_allowed = true;
1821         list_for_each_entry(port, &team->port_list, list) {
1822                 err = dev_set_mtu(port->dev, new_mtu);
1823                 if (err) {
1824                         netdev_err(dev, "Device %s failed to change mtu",
1825                                    port->dev->name);
1826                         goto unwind;
1827                 }
1828         }
1829         team->port_mtu_change_allowed = false;
1830         mutex_unlock(&team->lock);
1831
1832         dev->mtu = new_mtu;
1833
1834         return 0;
1835
1836 unwind:
1837         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1838                 dev_set_mtu(port->dev, dev->mtu);
1839         team->port_mtu_change_allowed = false;
1840         mutex_unlock(&team->lock);
1841
1842         return err;
1843 }
1844
1845 static void
1846 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1847 {
1848         struct team *team = netdev_priv(dev);
1849         struct team_pcpu_stats *p;
1850         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1851         u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1852         unsigned int start;
1853         int i;
1854
1855         for_each_possible_cpu(i) {
1856                 p = per_cpu_ptr(team->pcpu_stats, i);
1857                 do {
1858                         start = u64_stats_fetch_begin(&p->syncp);
1859                         rx_packets      = u64_stats_read(&p->rx_packets);
1860                         rx_bytes        = u64_stats_read(&p->rx_bytes);
1861                         rx_multicast    = u64_stats_read(&p->rx_multicast);
1862                         tx_packets      = u64_stats_read(&p->tx_packets);
1863                         tx_bytes        = u64_stats_read(&p->tx_bytes);
1864                 } while (u64_stats_fetch_retry(&p->syncp, start));
1865
1866                 stats->rx_packets       += rx_packets;
1867                 stats->rx_bytes         += rx_bytes;
1868                 stats->multicast        += rx_multicast;
1869                 stats->tx_packets       += tx_packets;
1870                 stats->tx_bytes         += tx_bytes;
1871                 /*
1872                  * rx_dropped, tx_dropped & rx_nohandler are u32,
1873                  * updated without syncp protection.
1874                  */
1875                 rx_dropped      += READ_ONCE(p->rx_dropped);
1876                 tx_dropped      += READ_ONCE(p->tx_dropped);
1877                 rx_nohandler    += READ_ONCE(p->rx_nohandler);
1878         }
1879         stats->rx_dropped       = rx_dropped;
1880         stats->tx_dropped       = tx_dropped;
1881         stats->rx_nohandler     = rx_nohandler;
1882 }
1883
1884 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1885 {
1886         struct team *team = netdev_priv(dev);
1887         struct team_port *port;
1888         int err;
1889
1890         /*
1891          * Alhough this is reader, it's guarded by team lock. It's not possible
1892          * to traverse list in reverse under rcu_read_lock
1893          */
1894         mutex_lock(&team->lock);
1895         list_for_each_entry(port, &team->port_list, list) {
1896                 err = vlan_vid_add(port->dev, proto, vid);
1897                 if (err)
1898                         goto unwind;
1899         }
1900         mutex_unlock(&team->lock);
1901
1902         return 0;
1903
1904 unwind:
1905         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1906                 vlan_vid_del(port->dev, proto, vid);
1907         mutex_unlock(&team->lock);
1908
1909         return err;
1910 }
1911
1912 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1913 {
1914         struct team *team = netdev_priv(dev);
1915         struct team_port *port;
1916
1917         mutex_lock(&team->lock);
1918         list_for_each_entry(port, &team->port_list, list)
1919                 vlan_vid_del(port->dev, proto, vid);
1920         mutex_unlock(&team->lock);
1921
1922         return 0;
1923 }
1924
1925 #ifdef CONFIG_NET_POLL_CONTROLLER
1926 static void team_poll_controller(struct net_device *dev)
1927 {
1928 }
1929
1930 static void __team_netpoll_cleanup(struct team *team)
1931 {
1932         struct team_port *port;
1933
1934         list_for_each_entry(port, &team->port_list, list)
1935                 team_port_disable_netpoll(port);
1936 }
1937
1938 static void team_netpoll_cleanup(struct net_device *dev)
1939 {
1940         struct team *team = netdev_priv(dev);
1941
1942         mutex_lock(&team->lock);
1943         __team_netpoll_cleanup(team);
1944         mutex_unlock(&team->lock);
1945 }
1946
1947 static int team_netpoll_setup(struct net_device *dev,
1948                               struct netpoll_info *npifo)
1949 {
1950         struct team *team = netdev_priv(dev);
1951         struct team_port *port;
1952         int err = 0;
1953
1954         mutex_lock(&team->lock);
1955         list_for_each_entry(port, &team->port_list, list) {
1956                 err = __team_port_enable_netpoll(port);
1957                 if (err) {
1958                         __team_netpoll_cleanup(team);
1959                         break;
1960                 }
1961         }
1962         mutex_unlock(&team->lock);
1963         return err;
1964 }
1965 #endif
1966
1967 static int team_add_slave(struct net_device *dev, struct net_device *port_dev,
1968                           struct netlink_ext_ack *extack)
1969 {
1970         struct team *team = netdev_priv(dev);
1971         int err;
1972
1973         mutex_lock(&team->lock);
1974         err = team_port_add(team, port_dev, extack);
1975         mutex_unlock(&team->lock);
1976
1977         if (!err)
1978                 netdev_change_features(dev);
1979
1980         return err;
1981 }
1982
1983 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1984 {
1985         struct team *team = netdev_priv(dev);
1986         int err;
1987
1988         mutex_lock(&team->lock);
1989         err = team_port_del(team, port_dev);
1990         mutex_unlock(&team->lock);
1991
1992         if (err)
1993                 return err;
1994
1995         if (netif_is_team_master(port_dev)) {
1996                 lockdep_unregister_key(&team->team_lock_key);
1997                 lockdep_register_key(&team->team_lock_key);
1998                 lockdep_set_class(&team->lock, &team->team_lock_key);
1999         }
2000         netdev_change_features(dev);
2001
2002         return err;
2003 }
2004
2005 static netdev_features_t team_fix_features(struct net_device *dev,
2006                                            netdev_features_t features)
2007 {
2008         struct team_port *port;
2009         struct team *team = netdev_priv(dev);
2010         netdev_features_t mask;
2011
2012         mask = features;
2013         features &= ~NETIF_F_ONE_FOR_ALL;
2014         features |= NETIF_F_ALL_FOR_ALL;
2015
2016         rcu_read_lock();
2017         list_for_each_entry_rcu(port, &team->port_list, list) {
2018                 features = netdev_increment_features(features,
2019                                                      port->dev->features,
2020                                                      mask);
2021         }
2022         rcu_read_unlock();
2023
2024         features = netdev_add_tso_features(features, mask);
2025
2026         return features;
2027 }
2028
2029 static int team_change_carrier(struct net_device *dev, bool new_carrier)
2030 {
2031         struct team *team = netdev_priv(dev);
2032
2033         team->user_carrier_enabled = true;
2034
2035         if (new_carrier)
2036                 netif_carrier_on(dev);
2037         else
2038                 netif_carrier_off(dev);
2039         return 0;
2040 }
2041
2042 static const struct net_device_ops team_netdev_ops = {
2043         .ndo_init               = team_init,
2044         .ndo_uninit             = team_uninit,
2045         .ndo_open               = team_open,
2046         .ndo_stop               = team_close,
2047         .ndo_start_xmit         = team_xmit,
2048         .ndo_select_queue       = team_select_queue,
2049         .ndo_change_rx_flags    = team_change_rx_flags,
2050         .ndo_set_rx_mode        = team_set_rx_mode,
2051         .ndo_set_mac_address    = team_set_mac_address,
2052         .ndo_change_mtu         = team_change_mtu,
2053         .ndo_get_stats64        = team_get_stats64,
2054         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
2055         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
2056 #ifdef CONFIG_NET_POLL_CONTROLLER
2057         .ndo_poll_controller    = team_poll_controller,
2058         .ndo_netpoll_setup      = team_netpoll_setup,
2059         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
2060 #endif
2061         .ndo_add_slave          = team_add_slave,
2062         .ndo_del_slave          = team_del_slave,
2063         .ndo_fix_features       = team_fix_features,
2064         .ndo_change_carrier     = team_change_carrier,
2065         .ndo_features_check     = passthru_features_check,
2066 };
2067
2068 /***********************
2069  * ethtool interface
2070  ***********************/
2071
2072 static void team_ethtool_get_drvinfo(struct net_device *dev,
2073                                      struct ethtool_drvinfo *drvinfo)
2074 {
2075         strscpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
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         struct team *team = netdev_priv(dev);
2119
2120         if (port_dev->type == ARPHRD_ETHER)
2121                 dev->header_ops = team->header_ops_cache;
2122         else
2123                 dev->header_ops = port_dev->header_ops;
2124         dev->type = port_dev->type;
2125         dev->hard_header_len = port_dev->hard_header_len;
2126         dev->needed_headroom = port_dev->needed_headroom;
2127         dev->addr_len = port_dev->addr_len;
2128         dev->mtu = port_dev->mtu;
2129         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2130         eth_hw_addr_inherit(dev, port_dev);
2131
2132         if (port_dev->flags & IFF_POINTOPOINT) {
2133                 dev->flags &= ~(IFF_BROADCAST | IFF_MULTICAST);
2134                 dev->flags |= (IFF_POINTOPOINT | IFF_NOARP);
2135         } else if ((port_dev->flags & (IFF_BROADCAST | IFF_MULTICAST)) ==
2136                     (IFF_BROADCAST | IFF_MULTICAST)) {
2137                 dev->flags |= (IFF_BROADCAST | IFF_MULTICAST);
2138                 dev->flags &= ~(IFF_POINTOPOINT | IFF_NOARP);
2139         }
2140 }
2141
2142 static int team_dev_type_check_change(struct net_device *dev,
2143                                       struct net_device *port_dev)
2144 {
2145         struct team *team = netdev_priv(dev);
2146         char *portname = port_dev->name;
2147         int err;
2148
2149         if (dev->type == port_dev->type)
2150                 return 0;
2151         if (!list_empty(&team->port_list)) {
2152                 netdev_err(dev, "Device %s is of different type\n", portname);
2153                 return -EBUSY;
2154         }
2155         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2156         err = notifier_to_errno(err);
2157         if (err) {
2158                 netdev_err(dev, "Refused to change device type\n");
2159                 return err;
2160         }
2161         dev_uc_flush(dev);
2162         dev_mc_flush(dev);
2163         team_setup_by_port(dev, port_dev);
2164         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2165         return 0;
2166 }
2167
2168 static void team_setup(struct net_device *dev)
2169 {
2170         struct team *team = netdev_priv(dev);
2171
2172         ether_setup(dev);
2173         dev->max_mtu = ETH_MAX_MTU;
2174         team->header_ops_cache = dev->header_ops;
2175
2176         dev->netdev_ops = &team_netdev_ops;
2177         dev->ethtool_ops = &team_ethtool_ops;
2178         dev->needs_free_netdev = true;
2179         dev->priv_destructor = team_destructor;
2180         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2181         dev->priv_flags |= IFF_NO_QUEUE;
2182         dev->priv_flags |= IFF_TEAM;
2183
2184         /*
2185          * Indicate we support unicast address filtering. That way core won't
2186          * bring us to promisc mode in case a unicast addr is added.
2187          * Let this up to underlay drivers.
2188          */
2189         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2190
2191         dev->features |= NETIF_F_LLTX;
2192         dev->features |= NETIF_F_GRO;
2193
2194         /* Don't allow team devices to change network namespaces. */
2195         dev->features |= NETIF_F_NETNS_LOCAL;
2196
2197         dev->hw_features = TEAM_VLAN_FEATURES |
2198                            NETIF_F_HW_VLAN_CTAG_RX |
2199                            NETIF_F_HW_VLAN_CTAG_FILTER |
2200                            NETIF_F_HW_VLAN_STAG_RX |
2201                            NETIF_F_HW_VLAN_STAG_FILTER;
2202
2203         dev->hw_features |= NETIF_F_GSO_ENCAP_ALL;
2204         dev->features |= dev->hw_features;
2205         dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
2206 }
2207
2208 static int team_newlink(struct net *src_net, struct net_device *dev,
2209                         struct nlattr *tb[], struct nlattr *data[],
2210                         struct netlink_ext_ack *extack)
2211 {
2212         if (tb[IFLA_ADDRESS] == NULL)
2213                 eth_hw_addr_random(dev);
2214
2215         return register_netdevice(dev);
2216 }
2217
2218 static int team_validate(struct nlattr *tb[], struct nlattr *data[],
2219                          struct netlink_ext_ack *extack)
2220 {
2221         if (tb[IFLA_ADDRESS]) {
2222                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2223                         return -EINVAL;
2224                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2225                         return -EADDRNOTAVAIL;
2226         }
2227         return 0;
2228 }
2229
2230 static unsigned int team_get_num_tx_queues(void)
2231 {
2232         return TEAM_DEFAULT_NUM_TX_QUEUES;
2233 }
2234
2235 static unsigned int team_get_num_rx_queues(void)
2236 {
2237         return TEAM_DEFAULT_NUM_RX_QUEUES;
2238 }
2239
2240 static struct rtnl_link_ops team_link_ops __read_mostly = {
2241         .kind                   = DRV_NAME,
2242         .priv_size              = sizeof(struct team),
2243         .setup                  = team_setup,
2244         .newlink                = team_newlink,
2245         .validate               = team_validate,
2246         .get_num_tx_queues      = team_get_num_tx_queues,
2247         .get_num_rx_queues      = team_get_num_rx_queues,
2248 };
2249
2250
2251 /***********************************
2252  * Generic netlink custom interface
2253  ***********************************/
2254
2255 static struct genl_family team_nl_family;
2256
2257 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2258         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
2259         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
2260         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
2261         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
2262 };
2263
2264 static const struct nla_policy
2265 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2266         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
2267         [TEAM_ATTR_OPTION_NAME] = {
2268                 .type = NLA_STRING,
2269                 .len = TEAM_STRING_MAX_LEN,
2270         },
2271         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
2272         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
2273         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
2274         [TEAM_ATTR_OPTION_PORT_IFINDEX]         = { .type = NLA_U32 },
2275         [TEAM_ATTR_OPTION_ARRAY_INDEX]          = { .type = NLA_U32 },
2276 };
2277
2278 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2279 {
2280         struct sk_buff *msg;
2281         void *hdr;
2282         int err;
2283
2284         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2285         if (!msg)
2286                 return -ENOMEM;
2287
2288         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2289                           &team_nl_family, 0, TEAM_CMD_NOOP);
2290         if (!hdr) {
2291                 err = -EMSGSIZE;
2292                 goto err_msg_put;
2293         }
2294
2295         genlmsg_end(msg, hdr);
2296
2297         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2298
2299 err_msg_put:
2300         nlmsg_free(msg);
2301
2302         return err;
2303 }
2304
2305 /*
2306  * Netlink cmd functions should be locked by following two functions.
2307  * Since dev gets held here, that ensures dev won't disappear in between.
2308  */
2309 static struct team *team_nl_team_get(struct genl_info *info)
2310 {
2311         struct net *net = genl_info_net(info);
2312         int ifindex;
2313         struct net_device *dev;
2314         struct team *team;
2315
2316         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2317                 return NULL;
2318
2319         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2320         dev = dev_get_by_index(net, ifindex);
2321         if (!dev || dev->netdev_ops != &team_netdev_ops) {
2322                 dev_put(dev);
2323                 return NULL;
2324         }
2325
2326         team = netdev_priv(dev);
2327         mutex_lock(&team->lock);
2328         return team;
2329 }
2330
2331 static void team_nl_team_put(struct team *team)
2332 {
2333         mutex_unlock(&team->lock);
2334         dev_put(team->dev);
2335 }
2336
2337 typedef int team_nl_send_func_t(struct sk_buff *skb,
2338                                 struct team *team, u32 portid);
2339
2340 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2341 {
2342         return genlmsg_unicast(dev_net(team->dev), skb, portid);
2343 }
2344
2345 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2346                                        struct team_option_inst *opt_inst)
2347 {
2348         struct nlattr *option_item;
2349         struct team_option *option = opt_inst->option;
2350         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2351         struct team_gsetter_ctx ctx;
2352         int err;
2353
2354         ctx.info = opt_inst_info;
2355         err = team_option_get(team, opt_inst, &ctx);
2356         if (err)
2357                 return err;
2358
2359         option_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_OPTION);
2360         if (!option_item)
2361                 return -EMSGSIZE;
2362
2363         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2364                 goto nest_cancel;
2365         if (opt_inst_info->port &&
2366             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2367                         opt_inst_info->port->dev->ifindex))
2368                 goto nest_cancel;
2369         if (opt_inst->option->array_size &&
2370             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2371                         opt_inst_info->array_index))
2372                 goto nest_cancel;
2373
2374         switch (option->type) {
2375         case TEAM_OPTION_TYPE_U32:
2376                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2377                         goto nest_cancel;
2378                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2379                         goto nest_cancel;
2380                 break;
2381         case TEAM_OPTION_TYPE_STRING:
2382                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2383                         goto nest_cancel;
2384                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2385                                    ctx.data.str_val))
2386                         goto nest_cancel;
2387                 break;
2388         case TEAM_OPTION_TYPE_BINARY:
2389                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2390                         goto nest_cancel;
2391                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2392                             ctx.data.bin_val.ptr))
2393                         goto nest_cancel;
2394                 break;
2395         case TEAM_OPTION_TYPE_BOOL:
2396                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2397                         goto nest_cancel;
2398                 if (ctx.data.bool_val &&
2399                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2400                         goto nest_cancel;
2401                 break;
2402         case TEAM_OPTION_TYPE_S32:
2403                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2404                         goto nest_cancel;
2405                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2406                         goto nest_cancel;
2407                 break;
2408         default:
2409                 BUG();
2410         }
2411         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2412                 goto nest_cancel;
2413         if (opt_inst->changed) {
2414                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2415                         goto nest_cancel;
2416                 opt_inst->changed = false;
2417         }
2418         nla_nest_end(skb, option_item);
2419         return 0;
2420
2421 nest_cancel:
2422         nla_nest_cancel(skb, option_item);
2423         return -EMSGSIZE;
2424 }
2425
2426 static int __send_and_alloc_skb(struct sk_buff **pskb,
2427                                 struct team *team, u32 portid,
2428                                 team_nl_send_func_t *send_func)
2429 {
2430         int err;
2431
2432         if (*pskb) {
2433                 err = send_func(*pskb, team, portid);
2434                 if (err)
2435                         return err;
2436         }
2437         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2438         if (!*pskb)
2439                 return -ENOMEM;
2440         return 0;
2441 }
2442
2443 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2444                                     int flags, team_nl_send_func_t *send_func,
2445                                     struct list_head *sel_opt_inst_list)
2446 {
2447         struct nlattr *option_list;
2448         struct nlmsghdr *nlh;
2449         void *hdr;
2450         struct team_option_inst *opt_inst;
2451         int err;
2452         struct sk_buff *skb = NULL;
2453         bool incomplete;
2454         int i;
2455
2456         opt_inst = list_first_entry(sel_opt_inst_list,
2457                                     struct team_option_inst, tmp_list);
2458
2459 start_again:
2460         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2461         if (err)
2462                 return err;
2463
2464         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2465                           TEAM_CMD_OPTIONS_GET);
2466         if (!hdr) {
2467                 nlmsg_free(skb);
2468                 return -EMSGSIZE;
2469         }
2470
2471         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2472                 goto nla_put_failure;
2473         option_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_OPTION);
2474         if (!option_list)
2475                 goto nla_put_failure;
2476
2477         i = 0;
2478         incomplete = false;
2479         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2480                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2481                 if (err) {
2482                         if (err == -EMSGSIZE) {
2483                                 if (!i)
2484                                         goto errout;
2485                                 incomplete = true;
2486                                 break;
2487                         }
2488                         goto errout;
2489                 }
2490                 i++;
2491         }
2492
2493         nla_nest_end(skb, option_list);
2494         genlmsg_end(skb, hdr);
2495         if (incomplete)
2496                 goto start_again;
2497
2498 send_done:
2499         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2500         if (!nlh) {
2501                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2502                 if (err)
2503                         return err;
2504                 goto send_done;
2505         }
2506
2507         return send_func(skb, team, portid);
2508
2509 nla_put_failure:
2510         err = -EMSGSIZE;
2511 errout:
2512         nlmsg_free(skb);
2513         return err;
2514 }
2515
2516 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2517 {
2518         struct team *team;
2519         struct team_option_inst *opt_inst;
2520         int err;
2521         LIST_HEAD(sel_opt_inst_list);
2522
2523         team = team_nl_team_get(info);
2524         if (!team)
2525                 return -EINVAL;
2526
2527         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2528                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2529         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2530                                        NLM_F_ACK, team_nl_send_unicast,
2531                                        &sel_opt_inst_list);
2532
2533         team_nl_team_put(team);
2534
2535         return err;
2536 }
2537
2538 static int team_nl_send_event_options_get(struct team *team,
2539                                           struct list_head *sel_opt_inst_list);
2540
2541 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2542 {
2543         struct team *team;
2544         int err = 0;
2545         int i;
2546         struct nlattr *nl_option;
2547
2548         rtnl_lock();
2549
2550         team = team_nl_team_get(info);
2551         if (!team) {
2552                 err = -EINVAL;
2553                 goto rtnl_unlock;
2554         }
2555
2556         err = -EINVAL;
2557         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2558                 err = -EINVAL;
2559                 goto team_put;
2560         }
2561
2562         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2563                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2564                 struct nlattr *attr;
2565                 struct nlattr *attr_data;
2566                 LIST_HEAD(opt_inst_list);
2567                 enum team_option_type opt_type;
2568                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2569                 u32 opt_array_index = 0;
2570                 bool opt_is_array = false;
2571                 struct team_option_inst *opt_inst;
2572                 char *opt_name;
2573                 bool opt_found = false;
2574
2575                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2576                         err = -EINVAL;
2577                         goto team_put;
2578                 }
2579                 err = nla_parse_nested_deprecated(opt_attrs,
2580                                                   TEAM_ATTR_OPTION_MAX,
2581                                                   nl_option,
2582                                                   team_nl_option_policy,
2583                                                   info->extack);
2584                 if (err)
2585                         goto team_put;
2586                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2587                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2588                         err = -EINVAL;
2589                         goto team_put;
2590                 }
2591                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2592                 case NLA_U32:
2593                         opt_type = TEAM_OPTION_TYPE_U32;
2594                         break;
2595                 case NLA_STRING:
2596                         opt_type = TEAM_OPTION_TYPE_STRING;
2597                         break;
2598                 case NLA_BINARY:
2599                         opt_type = TEAM_OPTION_TYPE_BINARY;
2600                         break;
2601                 case NLA_FLAG:
2602                         opt_type = TEAM_OPTION_TYPE_BOOL;
2603                         break;
2604                 case NLA_S32:
2605                         opt_type = TEAM_OPTION_TYPE_S32;
2606                         break;
2607                 default:
2608                         goto team_put;
2609                 }
2610
2611                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2612                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2613                         err = -EINVAL;
2614                         goto team_put;
2615                 }
2616
2617                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2618                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2619                 if (attr)
2620                         opt_port_ifindex = nla_get_u32(attr);
2621
2622                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2623                 if (attr) {
2624                         opt_is_array = true;
2625                         opt_array_index = nla_get_u32(attr);
2626                 }
2627
2628                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2629                         struct team_option *option = opt_inst->option;
2630                         struct team_gsetter_ctx ctx;
2631                         struct team_option_inst_info *opt_inst_info;
2632                         int tmp_ifindex;
2633
2634                         opt_inst_info = &opt_inst->info;
2635                         tmp_ifindex = opt_inst_info->port ?
2636                                       opt_inst_info->port->dev->ifindex : 0;
2637                         if (option->type != opt_type ||
2638                             strcmp(option->name, opt_name) ||
2639                             tmp_ifindex != opt_port_ifindex ||
2640                             (option->array_size && !opt_is_array) ||
2641                             opt_inst_info->array_index != opt_array_index)
2642                                 continue;
2643                         opt_found = true;
2644                         ctx.info = opt_inst_info;
2645                         switch (opt_type) {
2646                         case TEAM_OPTION_TYPE_U32:
2647                                 ctx.data.u32_val = nla_get_u32(attr_data);
2648                                 break;
2649                         case TEAM_OPTION_TYPE_STRING:
2650                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2651                                         err = -EINVAL;
2652                                         goto team_put;
2653                                 }
2654                                 ctx.data.str_val = nla_data(attr_data);
2655                                 break;
2656                         case TEAM_OPTION_TYPE_BINARY:
2657                                 ctx.data.bin_val.len = nla_len(attr_data);
2658                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2659                                 break;
2660                         case TEAM_OPTION_TYPE_BOOL:
2661                                 ctx.data.bool_val = attr_data ? true : false;
2662                                 break;
2663                         case TEAM_OPTION_TYPE_S32:
2664                                 ctx.data.s32_val = nla_get_s32(attr_data);
2665                                 break;
2666                         default:
2667                                 BUG();
2668                         }
2669                         err = team_option_set(team, opt_inst, &ctx);
2670                         if (err)
2671                                 goto team_put;
2672                         opt_inst->changed = true;
2673                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2674                 }
2675                 if (!opt_found) {
2676                         err = -ENOENT;
2677                         goto team_put;
2678                 }
2679
2680                 err = team_nl_send_event_options_get(team, &opt_inst_list);
2681                 if (err)
2682                         break;
2683         }
2684
2685 team_put:
2686         team_nl_team_put(team);
2687 rtnl_unlock:
2688         rtnl_unlock();
2689         return err;
2690 }
2691
2692 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2693                                      struct team_port *port)
2694 {
2695         struct nlattr *port_item;
2696
2697         port_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_PORT);
2698         if (!port_item)
2699                 goto nest_cancel;
2700         if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2701                 goto nest_cancel;
2702         if (port->changed) {
2703                 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2704                         goto nest_cancel;
2705                 port->changed = false;
2706         }
2707         if ((port->removed &&
2708              nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2709             (port->state.linkup &&
2710              nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2711             nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2712             nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2713                 goto nest_cancel;
2714         nla_nest_end(skb, port_item);
2715         return 0;
2716
2717 nest_cancel:
2718         nla_nest_cancel(skb, port_item);
2719         return -EMSGSIZE;
2720 }
2721
2722 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2723                                       int flags, team_nl_send_func_t *send_func,
2724                                       struct team_port *one_port)
2725 {
2726         struct nlattr *port_list;
2727         struct nlmsghdr *nlh;
2728         void *hdr;
2729         struct team_port *port;
2730         int err;
2731         struct sk_buff *skb = NULL;
2732         bool incomplete;
2733         int i;
2734
2735         port = list_first_entry_or_null(&team->port_list,
2736                                         struct team_port, list);
2737
2738 start_again:
2739         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2740         if (err)
2741                 return err;
2742
2743         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2744                           TEAM_CMD_PORT_LIST_GET);
2745         if (!hdr) {
2746                 nlmsg_free(skb);
2747                 return -EMSGSIZE;
2748         }
2749
2750         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2751                 goto nla_put_failure;
2752         port_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_PORT);
2753         if (!port_list)
2754                 goto nla_put_failure;
2755
2756         i = 0;
2757         incomplete = false;
2758
2759         /* If one port is selected, called wants to send port list containing
2760          * only this port. Otherwise go through all listed ports and send all
2761          */
2762         if (one_port) {
2763                 err = team_nl_fill_one_port_get(skb, one_port);
2764                 if (err)
2765                         goto errout;
2766         } else if (port) {
2767                 list_for_each_entry_from(port, &team->port_list, list) {
2768                         err = team_nl_fill_one_port_get(skb, port);
2769                         if (err) {
2770                                 if (err == -EMSGSIZE) {
2771                                         if (!i)
2772                                                 goto errout;
2773                                         incomplete = true;
2774                                         break;
2775                                 }
2776                                 goto errout;
2777                         }
2778                         i++;
2779                 }
2780         }
2781
2782         nla_nest_end(skb, port_list);
2783         genlmsg_end(skb, hdr);
2784         if (incomplete)
2785                 goto start_again;
2786
2787 send_done:
2788         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2789         if (!nlh) {
2790                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2791                 if (err)
2792                         return err;
2793                 goto send_done;
2794         }
2795
2796         return send_func(skb, team, portid);
2797
2798 nla_put_failure:
2799         err = -EMSGSIZE;
2800 errout:
2801         nlmsg_free(skb);
2802         return err;
2803 }
2804
2805 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2806                                      struct genl_info *info)
2807 {
2808         struct team *team;
2809         int err;
2810
2811         team = team_nl_team_get(info);
2812         if (!team)
2813                 return -EINVAL;
2814
2815         err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2816                                          NLM_F_ACK, team_nl_send_unicast, NULL);
2817
2818         team_nl_team_put(team);
2819
2820         return err;
2821 }
2822
2823 static const struct genl_small_ops team_nl_ops[] = {
2824         {
2825                 .cmd = TEAM_CMD_NOOP,
2826                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2827                 .doit = team_nl_cmd_noop,
2828         },
2829         {
2830                 .cmd = TEAM_CMD_OPTIONS_SET,
2831                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2832                 .doit = team_nl_cmd_options_set,
2833                 .flags = GENL_ADMIN_PERM,
2834         },
2835         {
2836                 .cmd = TEAM_CMD_OPTIONS_GET,
2837                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2838                 .doit = team_nl_cmd_options_get,
2839                 .flags = GENL_ADMIN_PERM,
2840         },
2841         {
2842                 .cmd = TEAM_CMD_PORT_LIST_GET,
2843                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2844                 .doit = team_nl_cmd_port_list_get,
2845                 .flags = GENL_ADMIN_PERM,
2846         },
2847 };
2848
2849 static const struct genl_multicast_group team_nl_mcgrps[] = {
2850         { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2851 };
2852
2853 static struct genl_family team_nl_family __ro_after_init = {
2854         .name           = TEAM_GENL_NAME,
2855         .version        = TEAM_GENL_VERSION,
2856         .maxattr        = TEAM_ATTR_MAX,
2857         .policy = team_nl_policy,
2858         .netnsok        = true,
2859         .module         = THIS_MODULE,
2860         .small_ops      = team_nl_ops,
2861         .n_small_ops    = ARRAY_SIZE(team_nl_ops),
2862         .resv_start_op  = TEAM_CMD_PORT_LIST_GET + 1,
2863         .mcgrps         = team_nl_mcgrps,
2864         .n_mcgrps       = ARRAY_SIZE(team_nl_mcgrps),
2865 };
2866
2867 static int team_nl_send_multicast(struct sk_buff *skb,
2868                                   struct team *team, u32 portid)
2869 {
2870         return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2871                                        skb, 0, 0, GFP_KERNEL);
2872 }
2873
2874 static int team_nl_send_event_options_get(struct team *team,
2875                                           struct list_head *sel_opt_inst_list)
2876 {
2877         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2878                                         sel_opt_inst_list);
2879 }
2880
2881 static int team_nl_send_event_port_get(struct team *team,
2882                                        struct team_port *port)
2883 {
2884         return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2885                                           port);
2886 }
2887
2888 static int __init team_nl_init(void)
2889 {
2890         return genl_register_family(&team_nl_family);
2891 }
2892
2893 static void __exit team_nl_fini(void)
2894 {
2895         genl_unregister_family(&team_nl_family);
2896 }
2897
2898
2899 /******************
2900  * Change checkers
2901  ******************/
2902
2903 static void __team_options_change_check(struct team *team)
2904 {
2905         int err;
2906         struct team_option_inst *opt_inst;
2907         LIST_HEAD(sel_opt_inst_list);
2908
2909         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2910                 if (opt_inst->changed)
2911                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2912         }
2913         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2914         if (err && err != -ESRCH)
2915                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2916                             err);
2917 }
2918
2919 /* rtnl lock is held */
2920
2921 static void __team_port_change_send(struct team_port *port, bool linkup)
2922 {
2923         int err;
2924
2925         port->changed = true;
2926         port->state.linkup = linkup;
2927         team_refresh_port_linkup(port);
2928         if (linkup) {
2929                 struct ethtool_link_ksettings ecmd;
2930
2931                 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2932                 if (!err) {
2933                         port->state.speed = ecmd.base.speed;
2934                         port->state.duplex = ecmd.base.duplex;
2935                         goto send_event;
2936                 }
2937         }
2938         port->state.speed = 0;
2939         port->state.duplex = 0;
2940
2941 send_event:
2942         err = team_nl_send_event_port_get(port->team, port);
2943         if (err && err != -ESRCH)
2944                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2945                             port->dev->name, err);
2946
2947 }
2948
2949 static void __team_carrier_check(struct team *team)
2950 {
2951         struct team_port *port;
2952         bool team_linkup;
2953
2954         if (team->user_carrier_enabled)
2955                 return;
2956
2957         team_linkup = false;
2958         list_for_each_entry(port, &team->port_list, list) {
2959                 if (port->linkup) {
2960                         team_linkup = true;
2961                         break;
2962                 }
2963         }
2964
2965         if (team_linkup)
2966                 netif_carrier_on(team->dev);
2967         else
2968                 netif_carrier_off(team->dev);
2969 }
2970
2971 static void __team_port_change_check(struct team_port *port, bool linkup)
2972 {
2973         if (port->state.linkup != linkup)
2974                 __team_port_change_send(port, linkup);
2975         __team_carrier_check(port->team);
2976 }
2977
2978 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2979 {
2980         __team_port_change_send(port, linkup);
2981         __team_carrier_check(port->team);
2982 }
2983
2984 static void __team_port_change_port_removed(struct team_port *port)
2985 {
2986         port->removed = true;
2987         __team_port_change_send(port, false);
2988         __team_carrier_check(port->team);
2989 }
2990
2991 static void team_port_change_check(struct team_port *port, bool linkup)
2992 {
2993         struct team *team = port->team;
2994
2995         mutex_lock(&team->lock);
2996         __team_port_change_check(port, linkup);
2997         mutex_unlock(&team->lock);
2998 }
2999
3000
3001 /************************************
3002  * Net device notifier event handler
3003  ************************************/
3004
3005 static int team_device_event(struct notifier_block *unused,
3006                              unsigned long event, void *ptr)
3007 {
3008         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
3009         struct team_port *port;
3010
3011         port = team_port_get_rtnl(dev);
3012         if (!port)
3013                 return NOTIFY_DONE;
3014
3015         switch (event) {
3016         case NETDEV_UP:
3017                 if (netif_oper_up(dev))
3018                         team_port_change_check(port, true);
3019                 break;
3020         case NETDEV_DOWN:
3021                 team_port_change_check(port, false);
3022                 break;
3023         case NETDEV_CHANGE:
3024                 if (netif_running(port->dev))
3025                         team_port_change_check(port,
3026                                                !!netif_oper_up(port->dev));
3027                 break;
3028         case NETDEV_UNREGISTER:
3029                 team_del_slave(port->team->dev, dev);
3030                 break;
3031         case NETDEV_FEAT_CHANGE:
3032                 if (!port->team->notifier_ctx) {
3033                         port->team->notifier_ctx = true;
3034                         team_compute_features(port->team);
3035                         port->team->notifier_ctx = false;
3036                 }
3037                 break;
3038         case NETDEV_PRECHANGEMTU:
3039                 /* Forbid to change mtu of underlaying device */
3040                 if (!port->team->port_mtu_change_allowed)
3041                         return NOTIFY_BAD;
3042                 break;
3043         case NETDEV_PRE_TYPE_CHANGE:
3044                 /* Forbid to change type of underlaying device */
3045                 return NOTIFY_BAD;
3046         case NETDEV_RESEND_IGMP:
3047                 /* Propagate to master device */
3048                 call_netdevice_notifiers(event, port->team->dev);
3049                 break;
3050         }
3051         return NOTIFY_DONE;
3052 }
3053
3054 static struct notifier_block team_notifier_block __read_mostly = {
3055         .notifier_call = team_device_event,
3056 };
3057
3058
3059 /***********************
3060  * Module init and exit
3061  ***********************/
3062
3063 static int __init team_module_init(void)
3064 {
3065         int err;
3066
3067         register_netdevice_notifier(&team_notifier_block);
3068
3069         err = rtnl_link_register(&team_link_ops);
3070         if (err)
3071                 goto err_rtnl_reg;
3072
3073         err = team_nl_init();
3074         if (err)
3075                 goto err_nl_init;
3076
3077         return 0;
3078
3079 err_nl_init:
3080         rtnl_link_unregister(&team_link_ops);
3081
3082 err_rtnl_reg:
3083         unregister_netdevice_notifier(&team_notifier_block);
3084
3085         return err;
3086 }
3087
3088 static void __exit team_module_exit(void)
3089 {
3090         team_nl_fini();
3091         rtnl_link_unregister(&team_link_ops);
3092         unregister_netdevice_notifier(&team_notifier_block);
3093 }
3094
3095 module_init(team_module_init);
3096 module_exit(team_module_exit);
3097
3098 MODULE_LICENSE("GPL v2");
3099 MODULE_AUTHOR("Jiri Pirko <[email protected]>");
3100 MODULE_DESCRIPTION("Ethernet team device driver");
3101 MODULE_ALIAS_RTNL_LINK(DRV_NAME);