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 <jpirko@redhat.com>
   5  */
   6
   7 #include <linux/kernel.h>
   8 #include <linux/types.h>
   9 #include <linux/module.h>
  10 #include <linux/init.h>
  11 #include <linux/slab.h>
  12 #include <linux/rcupdate.h>
  13 #include <linux/errno.h>
  14 #include <linux/ctype.h>
  15 #include <linux/notifier.h>
  16 #include <linux/netdevice.h>
  17 #include <linux/netpoll.h>
  18 #include <linux/if_vlan.h>
  19 #include <linux/if_arp.h>
  20 #include <linux/socket.h>
  21 #include <linux/etherdevice.h>
  22 #include <linux/rtnetlink.h>
  23 #include <net/rtnetlink.h>
  24 #include <net/genetlink.h>
  25 #include <net/netlink.h>
  26 #include <net/sch_generic.h>
  27 #include <generated/utsrelease.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         int err;
 152
 153         array_size = option->array_size;
 154         if (!array_size)
 155                 array_size = 1; /* No array but still need one instance */
 156
 157         for (i = 0; i < array_size; i++) {
 158                 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
 159                 if (!opt_inst)
 160                         return -ENOMEM;
 161                 opt_inst->option = option;
 162                 opt_inst->info.port = port;
 163                 opt_inst->info.array_index = i;
 164                 opt_inst->changed = true;
 165                 opt_inst->removed = false;
 166                 list_add_tail(&opt_inst->list, &team->option_inst_list);
 167                 if (option->init) {
 168                         err = option->init(team, &opt_inst->info);
 169                         if (err)
 170                                 return err;
 171                 }
 172
 173         }
 174         return 0;
 175 }
 176
 177 static int __team_option_inst_add_option(struct team *team,
 178                                          struct team_option *option)
 179 {
 180         int err;
 181
 182         if (!option->per_port) {
 183                 err = __team_option_inst_add(team, option, NULL);
 184                 if (err)
 185                         goto inst_del_option;
 186         }
 187         return 0;
 188
 189 inst_del_option:
 190         __team_option_inst_del_option(team, option);
 191         return err;
 192 }
 193
 194 static void __team_option_inst_mark_removed_option(struct team *team,
 195                                                    struct team_option *option)
 196 {
 197         struct team_option_inst *opt_inst;
 198
 199         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 200                 if (opt_inst->option == option) {
 201                         opt_inst->changed = true;
 202                         opt_inst->removed = true;
 203                 }
 204         }
 205 }
 206
 207 static void __team_option_inst_del_port(struct team *team,
 208                                         struct team_port *port)
 209 {
 210         struct team_option_inst *opt_inst, *tmp;
 211
 212         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 213                 if (opt_inst->option->per_port &&
 214                     opt_inst->info.port == port)
 215                         __team_option_inst_del(opt_inst);
 216         }
 217 }
 218
 219 static int __team_option_inst_add_port(struct team *team,
 220                                        struct team_port *port)
 221 {
 222         struct team_option *option;
 223         int err;
 224
 225         list_for_each_entry(option, &team->option_list, list) {
 226                 if (!option->per_port)
 227                         continue;
 228                 err = __team_option_inst_add(team, option, port);
 229                 if (err)
 230                         goto inst_del_port;
 231         }
 232         return 0;
 233
 234 inst_del_port:
 235         __team_option_inst_del_port(team, port);
 236         return err;
 237 }
 238
 239 static void __team_option_inst_mark_removed_port(struct team *team,
 240                                                  struct team_port *port)
 241 {
 242         struct team_option_inst *opt_inst;
 243
 244         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 245                 if (opt_inst->info.port == port) {
 246                         opt_inst->changed = true;
 247                         opt_inst->removed = true;
 248                 }
 249         }
 250 }
 251
 252 static int __team_options_register(struct team *team,
 253                                    const struct team_option *option,
 254                                    size_t option_count)
 255 {
 256         int i;
 257         struct team_option **dst_opts;
 258         int err;
 259
 260         dst_opts = kcalloc(option_count, sizeof(struct team_option *),
 261                            GFP_KERNEL);
 262         if (!dst_opts)
 263                 return -ENOMEM;
 264         for (i = 0; i < option_count; i++, option++) {
 265                 if (__team_find_option(team, option->name)) {
 266                         err = -EEXIST;
 267                         goto alloc_rollback;
 268                 }
 269                 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
 270                 if (!dst_opts[i]) {
 271                         err = -ENOMEM;
 272                         goto alloc_rollback;
 273                 }
 274         }
 275
 276         for (i = 0; i < option_count; i++) {
 277                 err = __team_option_inst_add_option(team, dst_opts[i]);
 278                 if (err)
 279                         goto inst_rollback;
 280                 list_add_tail(&dst_opts[i]->list, &team->option_list);
 281         }
 282
 283         kfree(dst_opts);
 284         return 0;
 285
 286 inst_rollback:
 287         for (i--; i >= 0; i--)
 288                 __team_option_inst_del_option(team, dst_opts[i]);
 289
 290         i = option_count;
 291 alloc_rollback:
 292         for (i--; i >= 0; i--)
 293                 kfree(dst_opts[i]);
 294
 295         kfree(dst_opts);
 296         return err;
 297 }
 298
 299 static void __team_options_mark_removed(struct team *team,
 300                                         const struct team_option *option,
 301                                         size_t option_count)
 302 {
 303         int i;
 304
 305         for (i = 0; i < option_count; i++, option++) {
 306                 struct team_option *del_opt;
 307
 308                 del_opt = __team_find_option(team, option->name);
 309                 if (del_opt)
 310                         __team_option_inst_mark_removed_option(team, del_opt);
 311         }
 312 }
 313
 314 static void __team_options_unregister(struct team *team,
 315                                       const struct team_option *option,
 316                                       size_t option_count)
 317 {
 318         int i;
 319
 320         for (i = 0; i < option_count; i++, option++) {
 321                 struct team_option *del_opt;
 322
 323                 del_opt = __team_find_option(team, option->name);
 324                 if (del_opt) {
 325                         __team_option_inst_del_option(team, del_opt);
 326                         list_del(&del_opt->list);
 327                         kfree(del_opt);
 328                 }
 329         }
 330 }
 331
 332 static void __team_options_change_check(struct team *team);
 333
 334 int team_options_register(struct team *team,
 335                           const struct team_option *option,
 336                           size_t option_count)
 337 {
 338         int err;
 339
 340         err = __team_options_register(team, option, option_count);
 341         if (err)
 342                 return err;
 343         __team_options_change_check(team);
 344         return 0;
 345 }
 346 EXPORT_SYMBOL(team_options_register);
 347
 348 void team_options_unregister(struct team *team,
 349                              const struct team_option *option,
 350                              size_t option_count)
 351 {
 352         __team_options_mark_removed(team, option, option_count);
 353         __team_options_change_check(team);
 354         __team_options_unregister(team, option, option_count);
 355 }
 356 EXPORT_SYMBOL(team_options_unregister);
 357
 358 static int team_option_get(struct team *team,
 359                            struct team_option_inst *opt_inst,
 360                            struct team_gsetter_ctx *ctx)
 361 {
 362         if (!opt_inst->option->getter)
 363                 return -EOPNOTSUPP;
 364         return opt_inst->option->getter(team, ctx);
 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                 /* allow exact match delivery for disabled ports */
 737                 res = RX_HANDLER_EXACT;
 738         } else {
 739                 res = team->ops.receive(team, port, skb);
 740         }
 741         if (res == RX_HANDLER_ANOTHER) {
 742                 struct team_pcpu_stats *pcpu_stats;
 743
 744                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
 745                 u64_stats_update_begin(&pcpu_stats->syncp);
 746                 pcpu_stats->rx_packets++;
 747                 pcpu_stats->rx_bytes += skb->len;
 748                 if (skb->pkt_type == PACKET_MULTICAST)
 749                         pcpu_stats->rx_multicast++;
 750                 u64_stats_update_end(&pcpu_stats->syncp);
 751
 752                 skb->dev = team->dev;
 753         } else if (res == RX_HANDLER_EXACT) {
 754                 this_cpu_inc(team->pcpu_stats->rx_nohandler);
 755         } else {
 756                 this_cpu_inc(team->pcpu_stats->rx_dropped);
 757         }
 758
 759         return res;
 760 }
 761
 762
 763 /*************************************
 764  * Multiqueue Tx port select override
 765  *************************************/
 766
 767 static int team_queue_override_init(struct team *team)
 768 {
 769         struct list_head *listarr;
 770         unsigned int queue_cnt = team->dev->num_tx_queues - 1;
 771         unsigned int i;
 772
 773         if (!queue_cnt)
 774                 return 0;
 775         listarr = kmalloc_array(queue_cnt, sizeof(struct list_head),
 776                                 GFP_KERNEL);
 777         if (!listarr)
 778                 return -ENOMEM;
 779         team->qom_lists = listarr;
 780         for (i = 0; i < queue_cnt; i++)
 781                 INIT_LIST_HEAD(listarr++);
 782         return 0;
 783 }
 784
 785 static void team_queue_override_fini(struct team *team)
 786 {
 787         kfree(team->qom_lists);
 788 }
 789
 790 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
 791 {
 792         return &team->qom_lists[queue_id - 1];
 793 }
 794
 795 /*
 796  * note: already called with rcu_read_lock
 797  */
 798 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
 799 {
 800         struct list_head *qom_list;
 801         struct team_port *port;
 802
 803         if (!team->queue_override_enabled || !skb->queue_mapping)
 804                 return false;
 805         qom_list = __team_get_qom_list(team, skb->queue_mapping);
 806         list_for_each_entry_rcu(port, qom_list, qom_list) {
 807                 if (!team_dev_queue_xmit(team, port, skb))
 808                         return true;
 809         }
 810         return false;
 811 }
 812
 813 static void __team_queue_override_port_del(struct team *team,
 814                                            struct team_port *port)
 815 {
 816         if (!port->queue_id)
 817                 return;
 818         list_del_rcu(&port->qom_list);
 819 }
 820
 821 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
 822                                                       struct team_port *cur)
 823 {
 824         if (port->priority < cur->priority)
 825                 return true;
 826         if (port->priority > cur->priority)
 827                 return false;
 828         if (port->index < cur->index)
 829                 return true;
 830         return false;
 831 }
 832
 833 static void __team_queue_override_port_add(struct team *team,
 834                                            struct team_port *port)
 835 {
 836         struct team_port *cur;
 837         struct list_head *qom_list;
 838         struct list_head *node;
 839
 840         if (!port->queue_id)
 841                 return;
 842         qom_list = __team_get_qom_list(team, port->queue_id);
 843         node = qom_list;
 844         list_for_each_entry(cur, qom_list, qom_list) {
 845                 if (team_queue_override_port_has_gt_prio_than(port, cur))
 846                         break;
 847                 node = &cur->qom_list;
 848         }
 849         list_add_tail_rcu(&port->qom_list, node);
 850 }
 851
 852 static void __team_queue_override_enabled_check(struct team *team)
 853 {
 854         struct team_port *port;
 855         bool enabled = false;
 856
 857         list_for_each_entry(port, &team->port_list, list) {
 858                 if (port->queue_id) {
 859                         enabled = true;
 860                         break;
 861                 }
 862         }
 863         if (enabled == team->queue_override_enabled)
 864                 return;
 865         netdev_dbg(team->dev, "%s queue override\n",
 866                    enabled ? "Enabling" : "Disabling");
 867         team->queue_override_enabled = enabled;
 868 }
 869
 870 static void team_queue_override_port_prio_changed(struct team *team,
 871                                                   struct team_port *port)
 872 {
 873         if (!port->queue_id || team_port_enabled(port))
 874                 return;
 875         __team_queue_override_port_del(team, port);
 876         __team_queue_override_port_add(team, port);
 877         __team_queue_override_enabled_check(team);
 878 }
 879
 880 static void team_queue_override_port_change_queue_id(struct team *team,
 881                                                      struct team_port *port,
 882                                                      u16 new_queue_id)
 883 {
 884         if (team_port_enabled(port)) {
 885                 __team_queue_override_port_del(team, port);
 886                 port->queue_id = new_queue_id;
 887                 __team_queue_override_port_add(team, port);
 888                 __team_queue_override_enabled_check(team);
 889         } else {
 890                 port->queue_id = new_queue_id;
 891         }
 892 }
 893
 894 static void team_queue_override_port_add(struct team *team,
 895                                          struct team_port *port)
 896 {
 897         __team_queue_override_port_add(team, port);
 898         __team_queue_override_enabled_check(team);
 899 }
 900
 901 static void team_queue_override_port_del(struct team *team,
 902                                          struct team_port *port)
 903 {
 904         __team_queue_override_port_del(team, port);
 905         __team_queue_override_enabled_check(team);
 906 }
 907
 908
 909 /****************
 910  * Port handling
 911  ****************/
 912
 913 static bool team_port_find(const struct team *team,
 914                            const struct team_port *port)
 915 {
 916         struct team_port *cur;
 917
 918         list_for_each_entry(cur, &team->port_list, list)
 919                 if (cur == port)
 920                         return true;
 921         return false;
 922 }
 923
 924 /*
 925  * Enable/disable port by adding to enabled port hashlist and setting
 926  * port->index (Might be racy so reader could see incorrect ifindex when
 927  * processing a flying packet, but that is not a problem). Write guarded
 928  * by team->lock.
 929  */
 930 static void team_port_enable(struct team *team,
 931                              struct team_port *port)
 932 {
 933         if (team_port_enabled(port))
 934                 return;
 935         port->index = team->en_port_count++;
 936         hlist_add_head_rcu(&port->hlist,
 937                            team_port_index_hash(team, port->index));
 938         team_adjust_ops(team);
 939         team_queue_override_port_add(team, port);
 940         if (team->ops.port_enabled)
 941                 team->ops.port_enabled(team, port);
 942         team_notify_peers(team);
 943         team_mcast_rejoin(team);
 944         team_lower_state_changed(port);
 945 }
 946
 947 static void __reconstruct_port_hlist(struct team *team, int rm_index)
 948 {
 949         int i;
 950         struct team_port *port;
 951
 952         for (i = rm_index + 1; i < team->en_port_count; i++) {
 953                 port = team_get_port_by_index(team, i);
 954                 hlist_del_rcu(&port->hlist);
 955                 port->index--;
 956                 hlist_add_head_rcu(&port->hlist,
 957                                    team_port_index_hash(team, port->index));
 958         }
 959 }
 960
 961 static void team_port_disable(struct team *team,
 962                               struct team_port *port)
 963 {
 964         if (!team_port_enabled(port))
 965                 return;
 966         if (team->ops.port_disabled)
 967                 team->ops.port_disabled(team, port);
 968         hlist_del_rcu(&port->hlist);
 969         __reconstruct_port_hlist(team, port->index);
 970         port->index = -1;
 971         team->en_port_count--;
 972         team_queue_override_port_del(team, port);
 973         team_adjust_ops(team);
 974         team_lower_state_changed(port);
 975 }
 976
 977 #define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
 978                             NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE | \
 979                             NETIF_F_HIGHDMA | NETIF_F_LRO)
 980
 981 #define TEAM_ENC_FEATURES       (NETIF_F_HW_CSUM | NETIF_F_SG | \
 982                                  NETIF_F_RXCSUM | NETIF_F_GSO_SOFTWARE)
 983
 984 static void __team_compute_features(struct team *team)
 985 {
 986         struct team_port *port;
 987         netdev_features_t vlan_features = TEAM_VLAN_FEATURES &
 988                                           NETIF_F_ALL_FOR_ALL;
 989         netdev_features_t enc_features  = TEAM_ENC_FEATURES;
 990         unsigned short max_hard_header_len = ETH_HLEN;
 991         unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
 992                                         IFF_XMIT_DST_RELEASE_PERM;
 993
 994         list_for_each_entry(port, &team->port_list, list) {
 995                 vlan_features = netdev_increment_features(vlan_features,
 996                                         port->dev->vlan_features,
 997                                         TEAM_VLAN_FEATURES);
 998                 enc_features =
 999                         netdev_increment_features(enc_features,
1000                                                   port->dev->hw_enc_features,
1001                                                   TEAM_ENC_FEATURES);
1002
1003
1004                 dst_release_flag &= port->dev->priv_flags;
1005                 if (port->dev->hard_header_len > max_hard_header_len)
1006                         max_hard_header_len = port->dev->hard_header_len;
1007         }
1008
1009         team->dev->vlan_features = vlan_features;
1010         team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL |
1011                                      NETIF_F_HW_VLAN_CTAG_TX |
1012                                      NETIF_F_HW_VLAN_STAG_TX;
1013         team->dev->hard_header_len = max_hard_header_len;
1014
1015         team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1016         if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1017                 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1018 }
1019
1020 static void team_compute_features(struct team *team)
1021 {
1022         mutex_lock(&team->lock);
1023         __team_compute_features(team);
1024         mutex_unlock(&team->lock);
1025         netdev_change_features(team->dev);
1026 }
1027
1028 static int team_port_enter(struct team *team, struct team_port *port)
1029 {
1030         int err = 0;
1031
1032         dev_hold(team->dev);
1033         if (team->ops.port_enter) {
1034                 err = team->ops.port_enter(team, port);
1035                 if (err) {
1036                         netdev_err(team->dev, "Device %s failed to enter team mode\n",
1037                                    port->dev->name);
1038                         goto err_port_enter;
1039                 }
1040         }
1041
1042         return 0;
1043
1044 err_port_enter:
1045         dev_put(team->dev);
1046
1047         return err;
1048 }
1049
1050 static void team_port_leave(struct team *team, struct team_port *port)
1051 {
1052         if (team->ops.port_leave)
1053                 team->ops.port_leave(team, port);
1054         dev_put(team->dev);
1055 }
1056
1057 #ifdef CONFIG_NET_POLL_CONTROLLER
1058 static int __team_port_enable_netpoll(struct team_port *port)
1059 {
1060         struct netpoll *np;
1061         int err;
1062
1063         np = kzalloc(sizeof(*np), GFP_KERNEL);
1064         if (!np)
1065                 return -ENOMEM;
1066
1067         err = __netpoll_setup(np, port->dev);
1068         if (err) {
1069                 kfree(np);
1070                 return err;
1071         }
1072         port->np = np;
1073         return err;
1074 }
1075
1076 static int team_port_enable_netpoll(struct team_port *port)
1077 {
1078         if (!port->team->dev->npinfo)
1079                 return 0;
1080
1081         return __team_port_enable_netpoll(port);
1082 }
1083
1084 static void team_port_disable_netpoll(struct team_port *port)
1085 {
1086         struct netpoll *np = port->np;
1087
1088         if (!np)
1089                 return;
1090         port->np = NULL;
1091
1092         __netpoll_free(np);
1093 }
1094 #else
1095 static int team_port_enable_netpoll(struct team_port *port)
1096 {
1097         return 0;
1098 }
1099 static void team_port_disable_netpoll(struct team_port *port)
1100 {
1101 }
1102 #endif
1103
1104 static int team_upper_dev_link(struct team *team, struct team_port *port,
1105                                struct netlink_ext_ack *extack)
1106 {
1107         struct netdev_lag_upper_info lag_upper_info;
1108         int err;
1109
1110         lag_upper_info.tx_type = team->mode->lag_tx_type;
1111         lag_upper_info.hash_type = NETDEV_LAG_HASH_UNKNOWN;
1112         err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1113                                            &lag_upper_info, extack);
1114         if (err)
1115                 return err;
1116         port->dev->priv_flags |= IFF_TEAM_PORT;
1117         return 0;
1118 }
1119
1120 static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1121 {
1122         netdev_upper_dev_unlink(port->dev, team->dev);
1123         port->dev->priv_flags &= ~IFF_TEAM_PORT;
1124 }
1125
1126 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1127 static int team_dev_type_check_change(struct net_device *dev,
1128                                       struct net_device *port_dev);
1129
1130 static int team_port_add(struct team *team, struct net_device *port_dev,
1131                          struct netlink_ext_ack *extack)
1132 {
1133         struct net_device *dev = team->dev;
1134         struct team_port *port;
1135         char *portname = port_dev->name;
1136         int err;
1137
1138         if (port_dev->flags & IFF_LOOPBACK) {
1139                 NL_SET_ERR_MSG(extack, "Loopback device can't be added as a team port");
1140                 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1141                            portname);
1142                 return -EINVAL;
1143         }
1144
1145         if (netif_is_team_port(port_dev)) {
1146                 NL_SET_ERR_MSG(extack, "Device is already a port of a team device");
1147                 netdev_err(dev, "Device %s is already a port "
1148                                 "of a team device\n", portname);
1149                 return -EBUSY;
1150         }
1151
1152         if (dev == port_dev) {
1153                 NL_SET_ERR_MSG(extack, "Cannot enslave team device to itself");
1154                 netdev_err(dev, "Cannot enslave team device to itself\n");
1155                 return -EINVAL;
1156         }
1157
1158         if (netdev_has_upper_dev(dev, port_dev)) {
1159                 NL_SET_ERR_MSG(extack, "Device is already an upper device of the team interface");
1160                 netdev_err(dev, "Device %s is already an upper device of the team interface\n",
1161                            portname);
1162                 return -EBUSY;
1163         }
1164
1165         if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1166             vlan_uses_dev(dev)) {
1167                 NL_SET_ERR_MSG(extack, "Device is VLAN challenged and team device has VLAN set up");
1168                 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1169                            portname);
1170                 return -EPERM;
1171         }
1172
1173         err = team_dev_type_check_change(dev, port_dev);
1174         if (err)
1175                 return err;
1176
1177         if (port_dev->flags & IFF_UP) {
1178                 NL_SET_ERR_MSG(extack, "Device is up. Set it down before adding it as a team port");
1179                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1180                            portname);
1181                 return -EBUSY;
1182         }
1183
1184         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1185                        GFP_KERNEL);
1186         if (!port)
1187                 return -ENOMEM;
1188
1189         port->dev = port_dev;
1190         port->team = team;
1191         INIT_LIST_HEAD(&port->qom_list);
1192
1193         port->orig.mtu = port_dev->mtu;
1194         err = dev_set_mtu(port_dev, dev->mtu);
1195         if (err) {
1196                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1197                 goto err_set_mtu;
1198         }
1199
1200         memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1201
1202         err = team_port_enter(team, port);
1203         if (err) {
1204                 netdev_err(dev, "Device %s failed to enter team mode\n",
1205                            portname);
1206                 goto err_port_enter;
1207         }
1208
1209         err = dev_open(port_dev, extack);
1210         if (err) {
1211                 netdev_dbg(dev, "Device %s opening failed\n",
1212                            portname);
1213                 goto err_dev_open;
1214         }
1215
1216         err = vlan_vids_add_by_dev(port_dev, dev);
1217         if (err) {
1218                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1219                                 portname);
1220                 goto err_vids_add;
1221         }
1222
1223         err = team_port_enable_netpoll(port);
1224         if (err) {
1225                 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1226                            portname);
1227                 goto err_enable_netpoll;
1228         }
1229
1230         if (!(dev->features & NETIF_F_LRO))
1231                 dev_disable_lro(port_dev);
1232
1233         err = netdev_rx_handler_register(port_dev, team_handle_frame,
1234                                          port);
1235         if (err) {
1236                 netdev_err(dev, "Device %s failed to register rx_handler\n",
1237                            portname);
1238                 goto err_handler_register;
1239         }
1240
1241         err = team_upper_dev_link(team, port, extack);
1242         if (err) {
1243                 netdev_err(dev, "Device %s failed to set upper link\n",
1244                            portname);
1245                 goto err_set_upper_link;
1246         }
1247
1248         err = __team_option_inst_add_port(team, port);
1249         if (err) {
1250                 netdev_err(dev, "Device %s failed to add per-port options\n",
1251                            portname);
1252                 goto err_option_port_add;
1253         }
1254
1255         /* set promiscuity level to new slave */
1256         if (dev->flags & IFF_PROMISC) {
1257                 err = dev_set_promiscuity(port_dev, 1);
1258                 if (err)
1259                         goto err_set_slave_promisc;
1260         }
1261
1262         /* set allmulti level to new slave */
1263         if (dev->flags & IFF_ALLMULTI) {
1264                 err = dev_set_allmulti(port_dev, 1);
1265                 if (err) {
1266                         if (dev->flags & IFF_PROMISC)
1267                                 dev_set_promiscuity(port_dev, -1);
1268                         goto err_set_slave_promisc;
1269                 }
1270         }
1271
1272         netif_addr_lock_bh(dev);
1273         dev_uc_sync_multiple(port_dev, dev);
1274         dev_mc_sync_multiple(port_dev, dev);
1275         netif_addr_unlock_bh(dev);
1276
1277         port->index = -1;
1278         list_add_tail_rcu(&port->list, &team->port_list);
1279         team_port_enable(team, port);
1280         __team_compute_features(team);
1281         __team_port_change_port_added(port, !!netif_oper_up(port_dev));
1282         __team_options_change_check(team);
1283
1284         netdev_info(dev, "Port device %s added\n", portname);
1285
1286         return 0;
1287
1288 err_set_slave_promisc:
1289         __team_option_inst_del_port(team, port);
1290
1291 err_option_port_add:
1292         team_upper_dev_unlink(team, port);
1293
1294 err_set_upper_link:
1295         netdev_rx_handler_unregister(port_dev);
1296
1297 err_handler_register:
1298         team_port_disable_netpoll(port);
1299
1300 err_enable_netpoll:
1301         vlan_vids_del_by_dev(port_dev, dev);
1302
1303 err_vids_add:
1304         dev_close(port_dev);
1305
1306 err_dev_open:
1307         team_port_leave(team, port);
1308         team_port_set_orig_dev_addr(port);
1309
1310 err_port_enter:
1311         dev_set_mtu(port_dev, port->orig.mtu);
1312
1313 err_set_mtu:
1314         kfree(port);
1315
1316         return err;
1317 }
1318
1319 static void __team_port_change_port_removed(struct team_port *port);
1320
1321 static int team_port_del(struct team *team, struct net_device *port_dev)
1322 {
1323         struct net_device *dev = team->dev;
1324         struct team_port *port;
1325         char *portname = port_dev->name;
1326
1327         port = team_port_get_rtnl(port_dev);
1328         if (!port || !team_port_find(team, port)) {
1329                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1330                            portname);
1331                 return -ENOENT;
1332         }
1333
1334         team_port_disable(team, port);
1335         list_del_rcu(&port->list);
1336
1337         if (dev->flags & IFF_PROMISC)
1338                 dev_set_promiscuity(port_dev, -1);
1339         if (dev->flags & IFF_ALLMULTI)
1340                 dev_set_allmulti(port_dev, -1);
1341
1342         team_upper_dev_unlink(team, port);
1343         netdev_rx_handler_unregister(port_dev);
1344         team_port_disable_netpoll(port);
1345         vlan_vids_del_by_dev(port_dev, dev);
1346         dev_uc_unsync(port_dev, dev);
1347         dev_mc_unsync(port_dev, dev);
1348         dev_close(port_dev);
1349         team_port_leave(team, port);
1350
1351         __team_option_inst_mark_removed_port(team, port);
1352         __team_options_change_check(team);
1353         __team_option_inst_del_port(team, port);
1354         __team_port_change_port_removed(port);
1355
1356         team_port_set_orig_dev_addr(port);
1357         dev_set_mtu(port_dev, port->orig.mtu);
1358         kfree_rcu(port, rcu);
1359         netdev_info(dev, "Port device %s removed\n", portname);
1360         __team_compute_features(team);
1361
1362         return 0;
1363 }
1364
1365
1366 /*****************
1367  * Net device ops
1368  *****************/
1369
1370 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1371 {
1372         ctx->data.str_val = team->mode->kind;
1373         return 0;
1374 }
1375
1376 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1377 {
1378         return team_change_mode(team, ctx->data.str_val);
1379 }
1380
1381 static int team_notify_peers_count_get(struct team *team,
1382                                        struct team_gsetter_ctx *ctx)
1383 {
1384         ctx->data.u32_val = team->notify_peers.count;
1385         return 0;
1386 }
1387
1388 static int team_notify_peers_count_set(struct team *team,
1389                                        struct team_gsetter_ctx *ctx)
1390 {
1391         team->notify_peers.count = ctx->data.u32_val;
1392         return 0;
1393 }
1394
1395 static int team_notify_peers_interval_get(struct team *team,
1396                                           struct team_gsetter_ctx *ctx)
1397 {
1398         ctx->data.u32_val = team->notify_peers.interval;
1399         return 0;
1400 }
1401
1402 static int team_notify_peers_interval_set(struct team *team,
1403                                           struct team_gsetter_ctx *ctx)
1404 {
1405         team->notify_peers.interval = ctx->data.u32_val;
1406         return 0;
1407 }
1408
1409 static int team_mcast_rejoin_count_get(struct team *team,
1410                                        struct team_gsetter_ctx *ctx)
1411 {
1412         ctx->data.u32_val = team->mcast_rejoin.count;
1413         return 0;
1414 }
1415
1416 static int team_mcast_rejoin_count_set(struct team *team,
1417                                        struct team_gsetter_ctx *ctx)
1418 {
1419         team->mcast_rejoin.count = ctx->data.u32_val;
1420         return 0;
1421 }
1422
1423 static int team_mcast_rejoin_interval_get(struct team *team,
1424                                           struct team_gsetter_ctx *ctx)
1425 {
1426         ctx->data.u32_val = team->mcast_rejoin.interval;
1427         return 0;
1428 }
1429
1430 static int team_mcast_rejoin_interval_set(struct team *team,
1431                                           struct team_gsetter_ctx *ctx)
1432 {
1433         team->mcast_rejoin.interval = ctx->data.u32_val;
1434         return 0;
1435 }
1436
1437 static int team_port_en_option_get(struct team *team,
1438                                    struct team_gsetter_ctx *ctx)
1439 {
1440         struct team_port *port = ctx->info->port;
1441
1442         ctx->data.bool_val = team_port_enabled(port);
1443         return 0;
1444 }
1445
1446 static int team_port_en_option_set(struct team *team,
1447                                    struct team_gsetter_ctx *ctx)
1448 {
1449         struct team_port *port = ctx->info->port;
1450
1451         if (ctx->data.bool_val)
1452                 team_port_enable(team, port);
1453         else
1454                 team_port_disable(team, port);
1455         return 0;
1456 }
1457
1458 static int team_user_linkup_option_get(struct team *team,
1459                                        struct team_gsetter_ctx *ctx)
1460 {
1461         struct team_port *port = ctx->info->port;
1462
1463         ctx->data.bool_val = port->user.linkup;
1464         return 0;
1465 }
1466
1467 static void __team_carrier_check(struct team *team);
1468
1469 static int team_user_linkup_option_set(struct team *team,
1470                                        struct team_gsetter_ctx *ctx)
1471 {
1472         struct team_port *port = ctx->info->port;
1473
1474         port->user.linkup = ctx->data.bool_val;
1475         team_refresh_port_linkup(port);
1476         __team_carrier_check(port->team);
1477         return 0;
1478 }
1479
1480 static int team_user_linkup_en_option_get(struct team *team,
1481                                           struct team_gsetter_ctx *ctx)
1482 {
1483         struct team_port *port = ctx->info->port;
1484
1485         ctx->data.bool_val = port->user.linkup_enabled;
1486         return 0;
1487 }
1488
1489 static int team_user_linkup_en_option_set(struct team *team,
1490                                           struct team_gsetter_ctx *ctx)
1491 {
1492         struct team_port *port = ctx->info->port;
1493
1494         port->user.linkup_enabled = ctx->data.bool_val;
1495         team_refresh_port_linkup(port);
1496         __team_carrier_check(port->team);
1497         return 0;
1498 }
1499
1500 static int team_priority_option_get(struct team *team,
1501                                     struct team_gsetter_ctx *ctx)
1502 {
1503         struct team_port *port = ctx->info->port;
1504
1505         ctx->data.s32_val = port->priority;
1506         return 0;
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 int 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         return 0;
1529 }
1530
1531 static int team_queue_id_option_set(struct team *team,
1532                                     struct team_gsetter_ctx *ctx)
1533 {
1534         struct team_port *port = ctx->info->port;
1535         u16 new_queue_id = ctx->data.u32_val;
1536
1537         if (port->queue_id == new_queue_id)
1538                 return 0;
1539         if (new_queue_id >= team->dev->real_num_tx_queues)
1540                 return -EINVAL;
1541         team_queue_override_port_change_queue_id(team, port, new_queue_id);
1542         return 0;
1543 }
1544
1545 static const struct team_option team_options[] = {
1546         {
1547                 .name = "mode",
1548                 .type = TEAM_OPTION_TYPE_STRING,
1549                 .getter = team_mode_option_get,
1550                 .setter = team_mode_option_set,
1551         },
1552         {
1553                 .name = "notify_peers_count",
1554                 .type = TEAM_OPTION_TYPE_U32,
1555                 .getter = team_notify_peers_count_get,
1556                 .setter = team_notify_peers_count_set,
1557         },
1558         {
1559                 .name = "notify_peers_interval",
1560                 .type = TEAM_OPTION_TYPE_U32,
1561                 .getter = team_notify_peers_interval_get,
1562                 .setter = team_notify_peers_interval_set,
1563         },
1564         {
1565                 .name = "mcast_rejoin_count",
1566                 .type = TEAM_OPTION_TYPE_U32,
1567                 .getter = team_mcast_rejoin_count_get,
1568                 .setter = team_mcast_rejoin_count_set,
1569         },
1570         {
1571                 .name = "mcast_rejoin_interval",
1572                 .type = TEAM_OPTION_TYPE_U32,
1573                 .getter = team_mcast_rejoin_interval_get,
1574                 .setter = team_mcast_rejoin_interval_set,
1575         },
1576         {
1577                 .name = "enabled",
1578                 .type = TEAM_OPTION_TYPE_BOOL,
1579                 .per_port = true,
1580                 .getter = team_port_en_option_get,
1581                 .setter = team_port_en_option_set,
1582         },
1583         {
1584                 .name = "user_linkup",
1585                 .type = TEAM_OPTION_TYPE_BOOL,
1586                 .per_port = true,
1587                 .getter = team_user_linkup_option_get,
1588                 .setter = team_user_linkup_option_set,
1589         },
1590         {
1591                 .name = "user_linkup_enabled",
1592                 .type = TEAM_OPTION_TYPE_BOOL,
1593                 .per_port = true,
1594                 .getter = team_user_linkup_en_option_get,
1595                 .setter = team_user_linkup_en_option_set,
1596         },
1597         {
1598                 .name = "priority",
1599                 .type = TEAM_OPTION_TYPE_S32,
1600                 .per_port = true,
1601                 .getter = team_priority_option_get,
1602                 .setter = team_priority_option_set,
1603         },
1604         {
1605                 .name = "queue_id",
1606                 .type = TEAM_OPTION_TYPE_U32,
1607                 .per_port = true,
1608                 .getter = team_queue_id_option_get,
1609                 .setter = team_queue_id_option_set,
1610         },
1611 };
1612
1613
1614 static int team_init(struct net_device *dev)
1615 {
1616         struct team *team = netdev_priv(dev);
1617         int i;
1618         int err;
1619
1620         team->dev = dev;
1621         team_set_no_mode(team);
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         return 0;
1698 }
1699
1700 /*
1701  * note: already called with rcu_read_lock
1702  */
1703 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1704 {
1705         struct team *team = netdev_priv(dev);
1706         bool tx_success;
1707         unsigned int len = skb->len;
1708
1709         tx_success = team_queue_override_transmit(team, skb);
1710         if (!tx_success)
1711                 tx_success = team->ops.transmit(team, skb);
1712         if (tx_success) {
1713                 struct team_pcpu_stats *pcpu_stats;
1714
1715                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1716                 u64_stats_update_begin(&pcpu_stats->syncp);
1717                 pcpu_stats->tx_packets++;
1718                 pcpu_stats->tx_bytes += len;
1719                 u64_stats_update_end(&pcpu_stats->syncp);
1720         } else {
1721                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1722         }
1723
1724         return NETDEV_TX_OK;
1725 }
1726
1727 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1728                              struct net_device *sb_dev)
1729 {
1730         /*
1731          * This helper function exists to help dev_pick_tx get the correct
1732          * destination queue.  Using a helper function skips a call to
1733          * skb_tx_hash and will put the skbs in the queue we expect on their
1734          * way down to the team driver.
1735          */
1736         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1737
1738         /*
1739          * Save the original txq to restore before passing to the driver
1740          */
1741         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1742
1743         if (unlikely(txq >= dev->real_num_tx_queues)) {
1744                 do {
1745                         txq -= dev->real_num_tx_queues;
1746                 } while (txq >= dev->real_num_tx_queues);
1747         }
1748         return txq;
1749 }
1750
1751 static void team_change_rx_flags(struct net_device *dev, int change)
1752 {
1753         struct team *team = netdev_priv(dev);
1754         struct team_port *port;
1755         int inc;
1756
1757         rcu_read_lock();
1758         list_for_each_entry_rcu(port, &team->port_list, list) {
1759                 if (change & IFF_PROMISC) {
1760                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1761                         dev_set_promiscuity(port->dev, inc);
1762                 }
1763                 if (change & IFF_ALLMULTI) {
1764                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1765                         dev_set_allmulti(port->dev, inc);
1766                 }
1767         }
1768         rcu_read_unlock();
1769 }
1770
1771 static void team_set_rx_mode(struct net_device *dev)
1772 {
1773         struct team *team = netdev_priv(dev);
1774         struct team_port *port;
1775
1776         rcu_read_lock();
1777         list_for_each_entry_rcu(port, &team->port_list, list) {
1778                 dev_uc_sync_multiple(port->dev, dev);
1779                 dev_mc_sync_multiple(port->dev, dev);
1780         }
1781         rcu_read_unlock();
1782 }
1783
1784 static int team_set_mac_address(struct net_device *dev, void *p)
1785 {
1786         struct sockaddr *addr = p;
1787         struct team *team = netdev_priv(dev);
1788         struct team_port *port;
1789
1790         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1791                 return -EADDRNOTAVAIL;
1792         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1793         mutex_lock(&team->lock);
1794         list_for_each_entry(port, &team->port_list, list)
1795                 if (team->ops.port_change_dev_addr)
1796                         team->ops.port_change_dev_addr(team, port);
1797         mutex_unlock(&team->lock);
1798         return 0;
1799 }
1800
1801 static int team_change_mtu(struct net_device *dev, int new_mtu)
1802 {
1803         struct team *team = netdev_priv(dev);
1804         struct team_port *port;
1805         int err;
1806
1807         /*
1808          * Alhough this is reader, it's guarded by team lock. It's not possible
1809          * to traverse list in reverse under rcu_read_lock
1810          */
1811         mutex_lock(&team->lock);
1812         team->port_mtu_change_allowed = true;
1813         list_for_each_entry(port, &team->port_list, list) {
1814                 err = dev_set_mtu(port->dev, new_mtu);
1815                 if (err) {
1816                         netdev_err(dev, "Device %s failed to change mtu",
1817                                    port->dev->name);
1818                         goto unwind;
1819                 }
1820         }
1821         team->port_mtu_change_allowed = false;
1822         mutex_unlock(&team->lock);
1823
1824         dev->mtu = new_mtu;
1825
1826         return 0;
1827
1828 unwind:
1829         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1830                 dev_set_mtu(port->dev, dev->mtu);
1831         team->port_mtu_change_allowed = false;
1832         mutex_unlock(&team->lock);
1833
1834         return err;
1835 }
1836
1837 static void
1838 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1839 {
1840         struct team *team = netdev_priv(dev);
1841         struct team_pcpu_stats *p;
1842         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1843         u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1844         unsigned int start;
1845         int i;
1846
1847         for_each_possible_cpu(i) {
1848                 p = per_cpu_ptr(team->pcpu_stats, i);
1849                 do {
1850                         start = u64_stats_fetch_begin_irq(&p->syncp);
1851                         rx_packets      = p->rx_packets;
1852                         rx_bytes        = p->rx_bytes;
1853                         rx_multicast    = p->rx_multicast;
1854                         tx_packets      = p->tx_packets;
1855                         tx_bytes        = p->tx_bytes;
1856                 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1857
1858                 stats->rx_packets       += rx_packets;
1859                 stats->rx_bytes         += rx_bytes;
1860                 stats->multicast        += rx_multicast;
1861                 stats->tx_packets       += tx_packets;
1862                 stats->tx_bytes         += tx_bytes;
1863                 /*
1864                  * rx_dropped, tx_dropped & rx_nohandler are u32,
1865                  * updated without syncp protection.
1866                  */
1867                 rx_dropped      += p->rx_dropped;
1868                 tx_dropped      += p->tx_dropped;
1869                 rx_nohandler    += p->rx_nohandler;
1870         }
1871         stats->rx_dropped       = rx_dropped;
1872         stats->tx_dropped       = tx_dropped;
1873         stats->rx_nohandler     = rx_nohandler;
1874 }
1875
1876 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1877 {
1878         struct team *team = netdev_priv(dev);
1879         struct team_port *port;
1880         int err;
1881
1882         /*
1883          * Alhough this is reader, it's guarded by team lock. It's not possible
1884          * to traverse list in reverse under rcu_read_lock
1885          */
1886         mutex_lock(&team->lock);
1887         list_for_each_entry(port, &team->port_list, list) {
1888                 err = vlan_vid_add(port->dev, proto, vid);
1889                 if (err)
1890                         goto unwind;
1891         }
1892         mutex_unlock(&team->lock);
1893
1894         return 0;
1895
1896 unwind:
1897         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1898                 vlan_vid_del(port->dev, proto, vid);
1899         mutex_unlock(&team->lock);
1900
1901         return err;
1902 }
1903
1904 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1905 {
1906         struct team *team = netdev_priv(dev);
1907         struct team_port *port;
1908
1909         mutex_lock(&team->lock);
1910         list_for_each_entry(port, &team->port_list, list)
1911                 vlan_vid_del(port->dev, proto, vid);
1912         mutex_unlock(&team->lock);
1913
1914         return 0;
1915 }
1916
1917 #ifdef CONFIG_NET_POLL_CONTROLLER
1918 static void team_poll_controller(struct net_device *dev)
1919 {
1920 }
1921
1922 static void __team_netpoll_cleanup(struct team *team)
1923 {
1924         struct team_port *port;
1925
1926         list_for_each_entry(port, &team->port_list, list)
1927                 team_port_disable_netpoll(port);
1928 }
1929
1930 static void team_netpoll_cleanup(struct net_device *dev)
1931 {
1932         struct team *team = netdev_priv(dev);
1933
1934         mutex_lock(&team->lock);
1935         __team_netpoll_cleanup(team);
1936         mutex_unlock(&team->lock);
1937 }
1938
1939 static int team_netpoll_setup(struct net_device *dev,
1940                               struct netpoll_info *npifo)
1941 {
1942         struct team *team = netdev_priv(dev);
1943         struct team_port *port;
1944         int err = 0;
1945
1946         mutex_lock(&team->lock);
1947         list_for_each_entry(port, &team->port_list, list) {
1948                 err = __team_port_enable_netpoll(port);
1949                 if (err) {
1950                         __team_netpoll_cleanup(team);
1951                         break;
1952                 }
1953         }
1954         mutex_unlock(&team->lock);
1955         return err;
1956 }
1957 #endif
1958
1959 static int team_add_slave(struct net_device *dev, struct net_device *port_dev,
1960                           struct netlink_ext_ack *extack)
1961 {
1962         struct team *team = netdev_priv(dev);
1963         int err;
1964
1965         mutex_lock(&team->lock);
1966         err = team_port_add(team, port_dev, extack);
1967         mutex_unlock(&team->lock);
1968
1969         if (!err)
1970                 netdev_change_features(dev);
1971
1972         return err;
1973 }
1974
1975 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1976 {
1977         struct team *team = netdev_priv(dev);
1978         int err;
1979
1980         mutex_lock(&team->lock);
1981         err = team_port_del(team, port_dev);
1982         mutex_unlock(&team->lock);
1983
1984         if (err)
1985                 return err;
1986
1987         if (netif_is_team_master(port_dev)) {
1988                 lockdep_unregister_key(&team->team_lock_key);
1989                 lockdep_register_key(&team->team_lock_key);
1990                 lockdep_set_class(&team->lock, &team->team_lock_key);
1991         }
1992         netdev_change_features(dev);
1993
1994         return err;
1995 }
1996
1997 static netdev_features_t team_fix_features(struct net_device *dev,
1998                                            netdev_features_t features)
1999 {
2000         struct team_port *port;
2001         struct team *team = netdev_priv(dev);
2002         netdev_features_t mask;
2003
2004         mask = features;
2005         features &= ~NETIF_F_ONE_FOR_ALL;
2006         features |= NETIF_F_ALL_FOR_ALL;
2007
2008         rcu_read_lock();
2009         list_for_each_entry_rcu(port, &team->port_list, list) {
2010                 features = netdev_increment_features(features,
2011                                                      port->dev->features,
2012                                                      mask);
2013         }
2014         rcu_read_unlock();
2015
2016         features = netdev_add_tso_features(features, mask);
2017
2018         return features;
2019 }
2020
2021 static int team_change_carrier(struct net_device *dev, bool new_carrier)
2022 {
2023         struct team *team = netdev_priv(dev);
2024
2025         team->user_carrier_enabled = true;
2026
2027         if (new_carrier)
2028                 netif_carrier_on(dev);
2029         else
2030                 netif_carrier_off(dev);
2031         return 0;
2032 }
2033
2034 static const struct net_device_ops team_netdev_ops = {
2035         .ndo_init               = team_init,
2036         .ndo_uninit             = team_uninit,
2037         .ndo_open               = team_open,
2038         .ndo_stop               = team_close,
2039         .ndo_start_xmit         = team_xmit,
2040         .ndo_select_queue       = team_select_queue,
2041         .ndo_change_rx_flags    = team_change_rx_flags,
2042         .ndo_set_rx_mode        = team_set_rx_mode,
2043         .ndo_set_mac_address    = team_set_mac_address,
2044         .ndo_change_mtu         = team_change_mtu,
2045         .ndo_get_stats64        = team_get_stats64,
2046         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
2047         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
2048 #ifdef CONFIG_NET_POLL_CONTROLLER
2049         .ndo_poll_controller    = team_poll_controller,
2050         .ndo_netpoll_setup      = team_netpoll_setup,
2051         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
2052 #endif
2053         .ndo_add_slave          = team_add_slave,
2054         .ndo_del_slave          = team_del_slave,
2055         .ndo_fix_features       = team_fix_features,
2056         .ndo_change_carrier     = team_change_carrier,
2057         .ndo_features_check     = passthru_features_check,
2058 };
2059
2060 /***********************
2061  * ethtool interface
2062  ***********************/
2063
2064 static void team_ethtool_get_drvinfo(struct net_device *dev,
2065                                      struct ethtool_drvinfo *drvinfo)
2066 {
2067         strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2068         strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2069 }
2070
2071 static int team_ethtool_get_link_ksettings(struct net_device *dev,
2072                                            struct ethtool_link_ksettings *cmd)
2073 {
2074         struct team *team= netdev_priv(dev);
2075         unsigned long speed = 0;
2076         struct team_port *port;
2077
2078         cmd->base.duplex = DUPLEX_UNKNOWN;
2079         cmd->base.port = PORT_OTHER;
2080
2081         rcu_read_lock();
2082         list_for_each_entry_rcu(port, &team->port_list, list) {
2083                 if (team_port_txable(port)) {
2084                         if (port->state.speed != SPEED_UNKNOWN)
2085                                 speed += port->state.speed;
2086                         if (cmd->base.duplex == DUPLEX_UNKNOWN &&
2087                             port->state.duplex != DUPLEX_UNKNOWN)
2088                                 cmd->base.duplex = port->state.duplex;
2089                 }
2090         }
2091         rcu_read_unlock();
2092
2093         cmd->base.speed = speed ? : SPEED_UNKNOWN;
2094
2095         return 0;
2096 }
2097
2098 static const struct ethtool_ops team_ethtool_ops = {
2099         .get_drvinfo            = team_ethtool_get_drvinfo,
2100         .get_link               = ethtool_op_get_link,
2101         .get_link_ksettings     = team_ethtool_get_link_ksettings,
2102 };
2103
2104 /***********************
2105  * rt netlink interface
2106  ***********************/
2107
2108 static void team_setup_by_port(struct net_device *dev,
2109                                struct net_device *port_dev)
2110 {
2111         dev->header_ops = port_dev->header_ops;
2112         dev->type = port_dev->type;
2113         dev->hard_header_len = port_dev->hard_header_len;
2114         dev->needed_headroom = port_dev->needed_headroom;
2115         dev->addr_len = port_dev->addr_len;
2116         dev->mtu = port_dev->mtu;
2117         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2118         eth_hw_addr_inherit(dev, port_dev);
2119 }
2120
2121 static int team_dev_type_check_change(struct net_device *dev,
2122                                       struct net_device *port_dev)
2123 {
2124         struct team *team = netdev_priv(dev);
2125         char *portname = port_dev->name;
2126         int err;
2127
2128         if (dev->type == port_dev->type)
2129                 return 0;
2130         if (!list_empty(&team->port_list)) {
2131                 netdev_err(dev, "Device %s is of different type\n", portname);
2132                 return -EBUSY;
2133         }
2134         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2135         err = notifier_to_errno(err);
2136         if (err) {
2137                 netdev_err(dev, "Refused to change device type\n");
2138                 return err;
2139         }
2140         dev_uc_flush(dev);
2141         dev_mc_flush(dev);
2142         team_setup_by_port(dev, port_dev);
2143         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2144         return 0;
2145 }
2146
2147 static void team_setup(struct net_device *dev)
2148 {
2149         ether_setup(dev);
2150         dev->max_mtu = ETH_MAX_MTU;
2151
2152         dev->netdev_ops = &team_netdev_ops;
2153         dev->ethtool_ops = &team_ethtool_ops;
2154         dev->needs_free_netdev = true;
2155         dev->priv_destructor = team_destructor;
2156         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2157         dev->priv_flags |= IFF_NO_QUEUE;
2158         dev->priv_flags |= IFF_TEAM;
2159
2160         /*
2161          * Indicate we support unicast address filtering. That way core won't
2162          * bring us to promisc mode in case a unicast addr is added.
2163          * Let this up to underlay drivers.
2164          */
2165         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2166
2167         dev->features |= NETIF_F_LLTX;
2168         dev->features |= NETIF_F_GRO;
2169
2170         /* Don't allow team devices to change network namespaces. */
2171         dev->features |= NETIF_F_NETNS_LOCAL;
2172
2173         dev->hw_features = TEAM_VLAN_FEATURES |
2174                            NETIF_F_HW_VLAN_CTAG_RX |
2175                            NETIF_F_HW_VLAN_CTAG_FILTER;
2176
2177         dev->hw_features |= NETIF_F_GSO_ENCAP_ALL;
2178         dev->features |= dev->hw_features;
2179         dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
2180 }
2181
2182 static int team_newlink(struct net *src_net, struct net_device *dev,
2183                         struct nlattr *tb[], struct nlattr *data[],
2184                         struct netlink_ext_ack *extack)
2185 {
2186         if (tb[IFLA_ADDRESS] == NULL)
2187                 eth_hw_addr_random(dev);
2188
2189         return register_netdevice(dev);
2190 }
2191
2192 static int team_validate(struct nlattr *tb[], struct nlattr *data[],
2193                          struct netlink_ext_ack *extack)
2194 {
2195         if (tb[IFLA_ADDRESS]) {
2196                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2197                         return -EINVAL;
2198                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2199                         return -EADDRNOTAVAIL;
2200         }
2201         return 0;
2202 }
2203
2204 static unsigned int team_get_num_tx_queues(void)
2205 {
2206         return TEAM_DEFAULT_NUM_TX_QUEUES;
2207 }
2208
2209 static unsigned int team_get_num_rx_queues(void)
2210 {
2211         return TEAM_DEFAULT_NUM_RX_QUEUES;
2212 }
2213
2214 static struct rtnl_link_ops team_link_ops __read_mostly = {
2215         .kind                   = DRV_NAME,
2216         .priv_size              = sizeof(struct team),
2217         .setup                  = team_setup,
2218         .newlink                = team_newlink,
2219         .validate               = team_validate,
2220         .get_num_tx_queues      = team_get_num_tx_queues,
2221         .get_num_rx_queues      = team_get_num_rx_queues,
2222 };
2223
2224
2225 /***********************************
2226  * Generic netlink custom interface
2227  ***********************************/
2228
2229 static struct genl_family team_nl_family;
2230
2231 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2232         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
2233         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
2234         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
2235         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
2236 };
2237
2238 static const struct nla_policy
2239 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2240         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
2241         [TEAM_ATTR_OPTION_NAME] = {
2242                 .type = NLA_STRING,
2243                 .len = TEAM_STRING_MAX_LEN,
2244         },
2245         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
2246         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
2247         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
2248         [TEAM_ATTR_OPTION_PORT_IFINDEX]         = { .type = NLA_U32 },
2249         [TEAM_ATTR_OPTION_ARRAY_INDEX]          = { .type = NLA_U32 },
2250 };
2251
2252 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2253 {
2254         struct sk_buff *msg;
2255         void *hdr;
2256         int err;
2257
2258         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2259         if (!msg)
2260                 return -ENOMEM;
2261
2262         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2263                           &team_nl_family, 0, TEAM_CMD_NOOP);
2264         if (!hdr) {
2265                 err = -EMSGSIZE;
2266                 goto err_msg_put;
2267         }
2268
2269         genlmsg_end(msg, hdr);
2270
2271         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2272
2273 err_msg_put:
2274         nlmsg_free(msg);
2275
2276         return err;
2277 }
2278
2279 /*
2280  * Netlink cmd functions should be locked by following two functions.
2281  * Since dev gets held here, that ensures dev won't disappear in between.
2282  */
2283 static struct team *team_nl_team_get(struct genl_info *info)
2284 {
2285         struct net *net = genl_info_net(info);
2286         int ifindex;
2287         struct net_device *dev;
2288         struct team *team;
2289
2290         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2291                 return NULL;
2292
2293         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2294         dev = dev_get_by_index(net, ifindex);
2295         if (!dev || dev->netdev_ops != &team_netdev_ops) {
2296                 if (dev)
2297                         dev_put(dev);
2298                 return NULL;
2299         }
2300
2301         team = netdev_priv(dev);
2302         mutex_lock(&team->lock);
2303         return team;
2304 }
2305
2306 static void team_nl_team_put(struct team *team)
2307 {
2308         mutex_unlock(&team->lock);
2309         dev_put(team->dev);
2310 }
2311
2312 typedef int team_nl_send_func_t(struct sk_buff *skb,
2313                                 struct team *team, u32 portid);
2314
2315 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2316 {
2317         return genlmsg_unicast(dev_net(team->dev), skb, portid);
2318 }
2319
2320 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2321                                        struct team_option_inst *opt_inst)
2322 {
2323         struct nlattr *option_item;
2324         struct team_option *option = opt_inst->option;
2325         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2326         struct team_gsetter_ctx ctx;
2327         int err;
2328
2329         ctx.info = opt_inst_info;
2330         err = team_option_get(team, opt_inst, &ctx);
2331         if (err)
2332                 return err;
2333
2334         option_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_OPTION);
2335         if (!option_item)
2336                 return -EMSGSIZE;
2337
2338         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2339                 goto nest_cancel;
2340         if (opt_inst_info->port &&
2341             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2342                         opt_inst_info->port->dev->ifindex))
2343                 goto nest_cancel;
2344         if (opt_inst->option->array_size &&
2345             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2346                         opt_inst_info->array_index))
2347                 goto nest_cancel;
2348
2349         switch (option->type) {
2350         case TEAM_OPTION_TYPE_U32:
2351                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2352                         goto nest_cancel;
2353                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2354                         goto nest_cancel;
2355                 break;
2356         case TEAM_OPTION_TYPE_STRING:
2357                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2358                         goto nest_cancel;
2359                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2360                                    ctx.data.str_val))
2361                         goto nest_cancel;
2362                 break;
2363         case TEAM_OPTION_TYPE_BINARY:
2364                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2365                         goto nest_cancel;
2366                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2367                             ctx.data.bin_val.ptr))
2368                         goto nest_cancel;
2369                 break;
2370         case TEAM_OPTION_TYPE_BOOL:
2371                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2372                         goto nest_cancel;
2373                 if (ctx.data.bool_val &&
2374                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2375                         goto nest_cancel;
2376                 break;
2377         case TEAM_OPTION_TYPE_S32:
2378                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2379                         goto nest_cancel;
2380                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2381                         goto nest_cancel;
2382                 break;
2383         default:
2384                 BUG();
2385         }
2386         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2387                 goto nest_cancel;
2388         if (opt_inst->changed) {
2389                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2390                         goto nest_cancel;
2391                 opt_inst->changed = false;
2392         }
2393         nla_nest_end(skb, option_item);
2394         return 0;
2395
2396 nest_cancel:
2397         nla_nest_cancel(skb, option_item);
2398         return -EMSGSIZE;
2399 }
2400
2401 static int __send_and_alloc_skb(struct sk_buff **pskb,
2402                                 struct team *team, u32 portid,
2403                                 team_nl_send_func_t *send_func)
2404 {
2405         int err;
2406
2407         if (*pskb) {
2408                 err = send_func(*pskb, team, portid);
2409                 if (err)
2410                         return err;
2411         }
2412         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2413         if (!*pskb)
2414                 return -ENOMEM;
2415         return 0;
2416 }
2417
2418 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2419                                     int flags, team_nl_send_func_t *send_func,
2420                                     struct list_head *sel_opt_inst_list)
2421 {
2422         struct nlattr *option_list;
2423         struct nlmsghdr *nlh;
2424         void *hdr;
2425         struct team_option_inst *opt_inst;
2426         int err;
2427         struct sk_buff *skb = NULL;
2428         bool incomplete;
2429         int i;
2430
2431         opt_inst = list_first_entry(sel_opt_inst_list,
2432                                     struct team_option_inst, tmp_list);
2433
2434 start_again:
2435         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2436         if (err)
2437                 return err;
2438
2439         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2440                           TEAM_CMD_OPTIONS_GET);
2441         if (!hdr) {
2442                 nlmsg_free(skb);
2443                 return -EMSGSIZE;
2444         }
2445
2446         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2447                 goto nla_put_failure;
2448         option_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_OPTION);
2449         if (!option_list)
2450                 goto nla_put_failure;
2451
2452         i = 0;
2453         incomplete = false;
2454         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2455                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2456                 if (err) {
2457                         if (err == -EMSGSIZE) {
2458                                 if (!i)
2459                                         goto errout;
2460                                 incomplete = true;
2461                                 break;
2462                         }
2463                         goto errout;
2464                 }
2465                 i++;
2466         }
2467
2468         nla_nest_end(skb, option_list);
2469         genlmsg_end(skb, hdr);
2470         if (incomplete)
2471                 goto start_again;
2472
2473 send_done:
2474         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2475         if (!nlh) {
2476                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2477                 if (err)
2478                         return err;
2479                 goto send_done;
2480         }
2481
2482         return send_func(skb, team, portid);
2483
2484 nla_put_failure:
2485         err = -EMSGSIZE;
2486 errout:
2487         nlmsg_free(skb);
2488         return err;
2489 }
2490
2491 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2492 {
2493         struct team *team;
2494         struct team_option_inst *opt_inst;
2495         int err;
2496         LIST_HEAD(sel_opt_inst_list);
2497
2498         team = team_nl_team_get(info);
2499         if (!team)
2500                 return -EINVAL;
2501
2502         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2503                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2504         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2505                                        NLM_F_ACK, team_nl_send_unicast,
2506                                        &sel_opt_inst_list);
2507
2508         team_nl_team_put(team);
2509
2510         return err;
2511 }
2512
2513 static int team_nl_send_event_options_get(struct team *team,
2514                                           struct list_head *sel_opt_inst_list);
2515
2516 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2517 {
2518         struct team *team;
2519         int err = 0;
2520         int i;
2521         struct nlattr *nl_option;
2522
2523         rtnl_lock();
2524
2525         team = team_nl_team_get(info);
2526         if (!team) {
2527                 err = -EINVAL;
2528                 goto rtnl_unlock;
2529         }
2530
2531         err = -EINVAL;
2532         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2533                 err = -EINVAL;
2534                 goto team_put;
2535         }
2536
2537         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2538                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2539                 struct nlattr *attr;
2540                 struct nlattr *attr_data;
2541                 LIST_HEAD(opt_inst_list);
2542                 enum team_option_type opt_type;
2543                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2544                 u32 opt_array_index = 0;
2545                 bool opt_is_array = false;
2546                 struct team_option_inst *opt_inst;
2547                 char *opt_name;
2548                 bool opt_found = false;
2549
2550                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2551                         err = -EINVAL;
2552                         goto team_put;
2553                 }
2554                 err = nla_parse_nested_deprecated(opt_attrs,
2555                                                   TEAM_ATTR_OPTION_MAX,
2556                                                   nl_option,
2557                                                   team_nl_option_policy,
2558                                                   info->extack);
2559                 if (err)
2560                         goto team_put;
2561                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2562                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2563                         err = -EINVAL;
2564                         goto team_put;
2565                 }
2566                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2567                 case NLA_U32:
2568                         opt_type = TEAM_OPTION_TYPE_U32;
2569                         break;
2570                 case NLA_STRING:
2571                         opt_type = TEAM_OPTION_TYPE_STRING;
2572                         break;
2573                 case NLA_BINARY:
2574                         opt_type = TEAM_OPTION_TYPE_BINARY;
2575                         break;
2576                 case NLA_FLAG:
2577                         opt_type = TEAM_OPTION_TYPE_BOOL;
2578                         break;
2579                 case NLA_S32:
2580                         opt_type = TEAM_OPTION_TYPE_S32;
2581                         break;
2582                 default:
2583                         goto team_put;
2584                 }
2585
2586                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2587                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2588                         err = -EINVAL;
2589                         goto team_put;
2590                 }
2591
2592                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2593                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2594                 if (attr)
2595                         opt_port_ifindex = nla_get_u32(attr);
2596
2597                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2598                 if (attr) {
2599                         opt_is_array = true;
2600                         opt_array_index = nla_get_u32(attr);
2601                 }
2602
2603                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2604                         struct team_option *option = opt_inst->option;
2605                         struct team_gsetter_ctx ctx;
2606                         struct team_option_inst_info *opt_inst_info;
2607                         int tmp_ifindex;
2608
2609                         opt_inst_info = &opt_inst->info;
2610                         tmp_ifindex = opt_inst_info->port ?
2611                                       opt_inst_info->port->dev->ifindex : 0;
2612                         if (option->type != opt_type ||
2613                             strcmp(option->name, opt_name) ||
2614                             tmp_ifindex != opt_port_ifindex ||
2615                             (option->array_size && !opt_is_array) ||
2616                             opt_inst_info->array_index != opt_array_index)
2617                                 continue;
2618                         opt_found = true;
2619                         ctx.info = opt_inst_info;
2620                         switch (opt_type) {
2621                         case TEAM_OPTION_TYPE_U32:
2622                                 ctx.data.u32_val = nla_get_u32(attr_data);
2623                                 break;
2624                         case TEAM_OPTION_TYPE_STRING:
2625                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2626                                         err = -EINVAL;
2627                                         goto team_put;
2628                                 }
2629                                 ctx.data.str_val = nla_data(attr_data);
2630                                 break;
2631                         case TEAM_OPTION_TYPE_BINARY:
2632                                 ctx.data.bin_val.len = nla_len(attr_data);
2633                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2634                                 break;
2635                         case TEAM_OPTION_TYPE_BOOL:
2636                                 ctx.data.bool_val = attr_data ? true : false;
2637                                 break;
2638                         case TEAM_OPTION_TYPE_S32:
2639                                 ctx.data.s32_val = nla_get_s32(attr_data);
2640                                 break;
2641                         default:
2642                                 BUG();
2643                         }
2644                         err = team_option_set(team, opt_inst, &ctx);
2645                         if (err)
2646                                 goto team_put;
2647                         opt_inst->changed = true;
2648                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2649                 }
2650                 if (!opt_found) {
2651                         err = -ENOENT;
2652                         goto team_put;
2653                 }
2654
2655                 err = team_nl_send_event_options_get(team, &opt_inst_list);
2656                 if (err)
2657                         break;
2658         }
2659
2660 team_put:
2661         team_nl_team_put(team);
2662 rtnl_unlock:
2663         rtnl_unlock();
2664         return err;
2665 }
2666
2667 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2668                                      struct team_port *port)
2669 {
2670         struct nlattr *port_item;
2671
2672         port_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_PORT);
2673         if (!port_item)
2674                 goto nest_cancel;
2675         if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2676                 goto nest_cancel;
2677         if (port->changed) {
2678                 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2679                         goto nest_cancel;
2680                 port->changed = false;
2681         }
2682         if ((port->removed &&
2683              nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2684             (port->state.linkup &&
2685              nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2686             nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2687             nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2688                 goto nest_cancel;
2689         nla_nest_end(skb, port_item);
2690         return 0;
2691
2692 nest_cancel:
2693         nla_nest_cancel(skb, port_item);
2694         return -EMSGSIZE;
2695 }
2696
2697 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2698                                       int flags, team_nl_send_func_t *send_func,
2699                                       struct team_port *one_port)
2700 {
2701         struct nlattr *port_list;
2702         struct nlmsghdr *nlh;
2703         void *hdr;
2704         struct team_port *port;
2705         int err;
2706         struct sk_buff *skb = NULL;
2707         bool incomplete;
2708         int i;
2709
2710         port = list_first_entry_or_null(&team->port_list,
2711                                         struct team_port, list);
2712
2713 start_again:
2714         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2715         if (err)
2716                 return err;
2717
2718         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2719                           TEAM_CMD_PORT_LIST_GET);
2720         if (!hdr) {
2721                 nlmsg_free(skb);
2722                 return -EMSGSIZE;
2723         }
2724
2725         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2726                 goto nla_put_failure;
2727         port_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_PORT);
2728         if (!port_list)
2729                 goto nla_put_failure;
2730
2731         i = 0;
2732         incomplete = false;
2733
2734         /* If one port is selected, called wants to send port list containing
2735          * only this port. Otherwise go through all listed ports and send all
2736          */
2737         if (one_port) {
2738                 err = team_nl_fill_one_port_get(skb, one_port);
2739                 if (err)
2740                         goto errout;
2741         } else if (port) {
2742                 list_for_each_entry_from(port, &team->port_list, list) {
2743                         err = team_nl_fill_one_port_get(skb, port);
2744                         if (err) {
2745                                 if (err == -EMSGSIZE) {
2746                                         if (!i)
2747                                                 goto errout;
2748                                         incomplete = true;
2749                                         break;
2750                                 }
2751                                 goto errout;
2752                         }
2753                         i++;
2754                 }
2755         }
2756
2757         nla_nest_end(skb, port_list);
2758         genlmsg_end(skb, hdr);
2759         if (incomplete)
2760                 goto start_again;
2761
2762 send_done:
2763         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2764         if (!nlh) {
2765                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2766                 if (err)
2767                         return err;
2768                 goto send_done;
2769         }
2770
2771         return send_func(skb, team, portid);
2772
2773 nla_put_failure:
2774         err = -EMSGSIZE;
2775 errout:
2776         nlmsg_free(skb);
2777         return err;
2778 }
2779
2780 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2781                                      struct genl_info *info)
2782 {
2783         struct team *team;
2784         int err;
2785
2786         team = team_nl_team_get(info);
2787         if (!team)
2788                 return -EINVAL;
2789
2790         err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2791                                          NLM_F_ACK, team_nl_send_unicast, NULL);
2792
2793         team_nl_team_put(team);
2794
2795         return err;
2796 }
2797
2798 static const struct genl_small_ops team_nl_ops[] = {
2799         {
2800                 .cmd = TEAM_CMD_NOOP,
2801                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2802                 .doit = team_nl_cmd_noop,
2803         },
2804         {
2805                 .cmd = TEAM_CMD_OPTIONS_SET,
2806                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2807                 .doit = team_nl_cmd_options_set,
2808                 .flags = GENL_ADMIN_PERM,
2809         },
2810         {
2811                 .cmd = TEAM_CMD_OPTIONS_GET,
2812                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2813                 .doit = team_nl_cmd_options_get,
2814                 .flags = GENL_ADMIN_PERM,
2815         },
2816         {
2817                 .cmd = TEAM_CMD_PORT_LIST_GET,
2818                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2819                 .doit = team_nl_cmd_port_list_get,
2820                 .flags = GENL_ADMIN_PERM,
2821         },
2822 };
2823
2824 static const struct genl_multicast_group team_nl_mcgrps[] = {
2825         { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2826 };
2827
2828 static struct genl_family team_nl_family __ro_after_init = {
2829         .name           = TEAM_GENL_NAME,
2830         .version        = TEAM_GENL_VERSION,
2831         .maxattr        = TEAM_ATTR_MAX,
2832         .policy = team_nl_policy,
2833         .netnsok        = true,
2834         .module         = THIS_MODULE,
2835         .small_ops      = team_nl_ops,
2836         .n_small_ops    = ARRAY_SIZE(team_nl_ops),
2837         .mcgrps         = team_nl_mcgrps,
2838         .n_mcgrps       = ARRAY_SIZE(team_nl_mcgrps),
2839 };
2840
2841 static int team_nl_send_multicast(struct sk_buff *skb,
2842                                   struct team *team, u32 portid)
2843 {
2844         return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2845                                        skb, 0, 0, GFP_KERNEL);
2846 }
2847
2848 static int team_nl_send_event_options_get(struct team *team,
2849                                           struct list_head *sel_opt_inst_list)
2850 {
2851         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2852                                         sel_opt_inst_list);
2853 }
2854
2855 static int team_nl_send_event_port_get(struct team *team,
2856                                        struct team_port *port)
2857 {
2858         return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2859                                           port);
2860 }
2861
2862 static int __init team_nl_init(void)
2863 {
2864         return genl_register_family(&team_nl_family);
2865 }
2866
2867 static void team_nl_fini(void)
2868 {
2869         genl_unregister_family(&team_nl_family);
2870 }
2871
2872
2873 /******************
2874  * Change checkers
2875  ******************/
2876
2877 static void __team_options_change_check(struct team *team)
2878 {
2879         int err;
2880         struct team_option_inst *opt_inst;
2881         LIST_HEAD(sel_opt_inst_list);
2882
2883         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2884                 if (opt_inst->changed)
2885                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2886         }
2887         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2888         if (err && err != -ESRCH)
2889                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2890                             err);
2891 }
2892
2893 /* rtnl lock is held */
2894
2895 static void __team_port_change_send(struct team_port *port, bool linkup)
2896 {
2897         int err;
2898
2899         port->changed = true;
2900         port->state.linkup = linkup;
2901         team_refresh_port_linkup(port);
2902         if (linkup) {
2903                 struct ethtool_link_ksettings ecmd;
2904
2905                 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2906                 if (!err) {
2907                         port->state.speed = ecmd.base.speed;
2908                         port->state.duplex = ecmd.base.duplex;
2909                         goto send_event;
2910                 }
2911         }
2912         port->state.speed = 0;
2913         port->state.duplex = 0;
2914
2915 send_event:
2916         err = team_nl_send_event_port_get(port->team, port);
2917         if (err && err != -ESRCH)
2918                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2919                             port->dev->name, err);
2920
2921 }
2922
2923 static void __team_carrier_check(struct team *team)
2924 {
2925         struct team_port *port;
2926         bool team_linkup;
2927
2928         if (team->user_carrier_enabled)
2929                 return;
2930
2931         team_linkup = false;
2932         list_for_each_entry(port, &team->port_list, list) {
2933                 if (port->linkup) {
2934                         team_linkup = true;
2935                         break;
2936                 }
2937         }
2938
2939         if (team_linkup)
2940                 netif_carrier_on(team->dev);
2941         else
2942                 netif_carrier_off(team->dev);
2943 }
2944
2945 static void __team_port_change_check(struct team_port *port, bool linkup)
2946 {
2947         if (port->state.linkup != linkup)
2948                 __team_port_change_send(port, linkup);
2949         __team_carrier_check(port->team);
2950 }
2951
2952 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2953 {
2954         __team_port_change_send(port, linkup);
2955         __team_carrier_check(port->team);
2956 }
2957
2958 static void __team_port_change_port_removed(struct team_port *port)
2959 {
2960         port->removed = true;
2961         __team_port_change_send(port, false);
2962         __team_carrier_check(port->team);
2963 }
2964
2965 static void team_port_change_check(struct team_port *port, bool linkup)
2966 {
2967         struct team *team = port->team;
2968
2969         mutex_lock(&team->lock);
2970         __team_port_change_check(port, linkup);
2971         mutex_unlock(&team->lock);
2972 }
2973
2974
2975 /************************************
2976  * Net device notifier event handler
2977  ************************************/
2978
2979 static int team_device_event(struct notifier_block *unused,
2980                              unsigned long event, void *ptr)
2981 {
2982         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2983         struct team_port *port;
2984
2985         port = team_port_get_rtnl(dev);
2986         if (!port)
2987                 return NOTIFY_DONE;
2988
2989         switch (event) {
2990         case NETDEV_UP:
2991                 if (netif_oper_up(dev))
2992                         team_port_change_check(port, true);
2993                 break;
2994         case NETDEV_DOWN:
2995                 team_port_change_check(port, false);
2996                 break;
2997         case NETDEV_CHANGE:
2998                 if (netif_running(port->dev))
2999                         team_port_change_check(port,
3000                                                !!netif_oper_up(port->dev));
3001                 break;
3002         case NETDEV_UNREGISTER:
3003                 team_del_slave(port->team->dev, dev);
3004                 break;
3005         case NETDEV_FEAT_CHANGE:
3006                 team_compute_features(port->team);
3007                 break;
3008         case NETDEV_PRECHANGEMTU:
3009                 /* Forbid to change mtu of underlaying device */
3010                 if (!port->team->port_mtu_change_allowed)
3011                         return NOTIFY_BAD;
3012                 break;
3013         case NETDEV_PRE_TYPE_CHANGE:
3014                 /* Forbid to change type of underlaying device */
3015                 return NOTIFY_BAD;
3016         case NETDEV_RESEND_IGMP:
3017                 /* Propagate to master device */
3018                 call_netdevice_notifiers(event, port->team->dev);
3019                 break;
3020         }
3021         return NOTIFY_DONE;
3022 }
3023
3024 static struct notifier_block team_notifier_block __read_mostly = {
3025         .notifier_call = team_device_event,
3026 };
3027
3028
3029 /***********************
3030  * Module init and exit
3031  ***********************/
3032
3033 static int __init team_module_init(void)
3034 {
3035         int err;
3036
3037         register_netdevice_notifier(&team_notifier_block);
3038
3039         err = rtnl_link_register(&team_link_ops);
3040         if (err)
3041                 goto err_rtnl_reg;
3042
3043         err = team_nl_init();
3044         if (err)
3045                 goto err_nl_init;
3046
3047         return 0;
3048
3049 err_nl_init:
3050         rtnl_link_unregister(&team_link_ops);
3051
3052 err_rtnl_reg:
3053         unregister_netdevice_notifier(&team_notifier_block);
3054
3055         return err;
3056 }
3057
3058 static void __exit team_module_exit(void)
3059 {
3060         team_nl_fini();
3061         rtnl_link_unregister(&team_link_ops);
3062         unregister_netdevice_notifier(&team_notifier_block);
3063 }
3064
3065 module_init(team_module_init);
3066 module_exit(team_module_exit);
3067
3068 MODULE_LICENSE("GPL v2");
3069 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
3070 MODULE_DESCRIPTION("Ethernet team device driver");
3071 MODULE_ALIAS_RTNL_LINK(DRV_NAME);