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 - 1;
 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         spin_lock(&mode_list_lock);
 472         mitem = __find_mode(kind);
 473         if (!mitem) {
 474                 spin_unlock(&mode_list_lock);
 475                 request_module("team-mode-%s", kind);
 476                 spin_lock(&mode_list_lock);
 477                 mitem = __find_mode(kind);
 478         }
 479         if (mitem) {
 480                 mode = mitem->mode;
 481                 if (!try_module_get(mode->owner))
 482                         mode = NULL;
 483         }
 484
 485         spin_unlock(&mode_list_lock);
 486         return mode;
 487 }
 488
 489 static void team_mode_put(const struct team_mode *mode)
 490 {
 491         module_put(mode->owner);
 492 }
 493
 494 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
 495 {
 496         dev_kfree_skb_any(skb);
 497         return false;
 498 }
 499
 500 static rx_handler_result_t team_dummy_receive(struct team *team,
 501                                               struct team_port *port,
 502                                               struct sk_buff *skb)
 503 {
 504         return RX_HANDLER_ANOTHER;
 505 }
 506
 507 static const struct team_mode __team_no_mode = {
 508         .kind           = "*NOMODE*",
 509 };
 510
 511 static bool team_is_mode_set(struct team *team)
 512 {
 513         return team->mode != &__team_no_mode;
 514 }
 515
 516 static void team_set_no_mode(struct team *team)
 517 {
 518         team->user_carrier_enabled = false;
 519         team->mode = &__team_no_mode;
 520 }
 521
 522 static void team_adjust_ops(struct team *team)
 523 {
 524         /*
 525          * To avoid checks in rx/tx skb paths, ensure here that non-null and
 526          * correct ops are always set.
 527          */
 528
 529         if (!team->en_port_count || !team_is_mode_set(team) ||
 530             !team->mode->ops->transmit)
 531                 team->ops.transmit = team_dummy_transmit;
 532         else
 533                 team->ops.transmit = team->mode->ops->transmit;
 534
 535         if (!team->en_port_count || !team_is_mode_set(team) ||
 536             !team->mode->ops->receive)
 537                 team->ops.receive = team_dummy_receive;
 538         else
 539                 team->ops.receive = team->mode->ops->receive;
 540 }
 541
 542 /*
 543  * We can benefit from the fact that it's ensured no port is present
 544  * at the time of mode change. Therefore no packets are in fly so there's no
 545  * need to set mode operations in any special way.
 546  */
 547 static int __team_change_mode(struct team *team,
 548                               const struct team_mode *new_mode)
 549 {
 550         /* Check if mode was previously set and do cleanup if so */
 551         if (team_is_mode_set(team)) {
 552                 void (*exit_op)(struct team *team) = team->ops.exit;
 553
 554                 /* Clear ops area so no callback is called any longer */
 555                 memset(&team->ops, 0, sizeof(struct team_mode_ops));
 556                 team_adjust_ops(team);
 557
 558                 if (exit_op)
 559                         exit_op(team);
 560                 team_mode_put(team->mode);
 561                 team_set_no_mode(team);
 562                 /* zero private data area */
 563                 memset(&team->mode_priv, 0,
 564                        sizeof(struct team) - offsetof(struct team, mode_priv));
 565         }
 566
 567         if (!new_mode)
 568                 return 0;
 569
 570         if (new_mode->ops->init) {
 571                 int err;
 572
 573                 err = new_mode->ops->init(team);
 574                 if (err)
 575                         return err;
 576         }
 577
 578         team->mode = new_mode;
 579         memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
 580         team_adjust_ops(team);
 581
 582         return 0;
 583 }
 584
 585 static int team_change_mode(struct team *team, const char *kind)
 586 {
 587         const struct team_mode *new_mode;
 588         struct net_device *dev = team->dev;
 589         int err;
 590
 591         if (!list_empty(&team->port_list)) {
 592                 netdev_err(dev, "No ports can be present during mode change\n");
 593                 return -EBUSY;
 594         }
 595
 596         if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
 597                 netdev_err(dev, "Unable to change to the same mode the team is in\n");
 598                 return -EINVAL;
 599         }
 600
 601         new_mode = team_mode_get(kind);
 602         if (!new_mode) {
 603                 netdev_err(dev, "Mode \"%s\" not found\n", kind);
 604                 return -EINVAL;
 605         }
 606
 607         err = __team_change_mode(team, new_mode);
 608         if (err) {
 609                 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
 610                 team_mode_put(new_mode);
 611                 return err;
 612         }
 613
 614         netdev_info(dev, "Mode changed to \"%s\"\n", kind);
 615         return 0;
 616 }
 617
 618
 619 /*********************
 620  * Peers notification
 621  *********************/
 622
 623 static void team_notify_peers_work(struct work_struct *work)
 624 {
 625         struct team *team;
 626         int val;
 627
 628         team = container_of(work, struct team, notify_peers.dw.work);
 629
 630         if (!rtnl_trylock()) {
 631                 schedule_delayed_work(&team->notify_peers.dw, 0);
 632                 return;
 633         }
 634         val = atomic_dec_if_positive(&team->notify_peers.count_pending);
 635         if (val < 0) {
 636                 rtnl_unlock();
 637                 return;
 638         }
 639         call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
 640         rtnl_unlock();
 641         if (val)
 642                 schedule_delayed_work(&team->notify_peers.dw,
 643                                       msecs_to_jiffies(team->notify_peers.interval));
 644 }
 645
 646 static void team_notify_peers(struct team *team)
 647 {
 648         if (!team->notify_peers.count || !netif_running(team->dev))
 649                 return;
 650         atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
 651         schedule_delayed_work(&team->notify_peers.dw, 0);
 652 }
 653
 654 static void team_notify_peers_init(struct team *team)
 655 {
 656         INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
 657 }
 658
 659 static void team_notify_peers_fini(struct team *team)
 660 {
 661         cancel_delayed_work_sync(&team->notify_peers.dw);
 662 }
 663
 664
 665 /*******************************
 666  * Send multicast group rejoins
 667  *******************************/
 668
 669 static void team_mcast_rejoin_work(struct work_struct *work)
 670 {
 671         struct team *team;
 672         int val;
 673
 674         team = container_of(work, struct team, mcast_rejoin.dw.work);
 675
 676         if (!rtnl_trylock()) {
 677                 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 678                 return;
 679         }
 680         val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending);
 681         if (val < 0) {
 682                 rtnl_unlock();
 683                 return;
 684         }
 685         call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
 686         rtnl_unlock();
 687         if (val)
 688                 schedule_delayed_work(&team->mcast_rejoin.dw,
 689                                       msecs_to_jiffies(team->mcast_rejoin.interval));
 690 }
 691
 692 static void team_mcast_rejoin(struct team *team)
 693 {
 694         if (!team->mcast_rejoin.count || !netif_running(team->dev))
 695                 return;
 696         atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
 697         schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 698 }
 699
 700 static void team_mcast_rejoin_init(struct team *team)
 701 {
 702         INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
 703 }
 704
 705 static void team_mcast_rejoin_fini(struct team *team)
 706 {
 707         cancel_delayed_work_sync(&team->mcast_rejoin.dw);
 708 }
 709
 710
 711 /************************
 712  * Rx path frame handler
 713  ************************/
 714
 715 /* note: already called with rcu_read_lock */
 716 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
 717 {
 718         struct sk_buff *skb = *pskb;
 719         struct team_port *port;
 720         struct team *team;
 721         rx_handler_result_t res;
 722
 723         skb = skb_share_check(skb, GFP_ATOMIC);
 724         if (!skb)
 725                 return RX_HANDLER_CONSUMED;
 726
 727         *pskb = skb;
 728
 729         port = team_port_get_rcu(skb->dev);
 730         team = port->team;
 731         if (!team_port_enabled(port)) {
 732                 /* allow exact match delivery for disabled ports */
 733                 res = RX_HANDLER_EXACT;
 734         } else {
 735                 res = team->ops.receive(team, port, skb);
 736         }
 737         if (res == RX_HANDLER_ANOTHER) {
 738                 struct team_pcpu_stats *pcpu_stats;
 739
 740                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
 741                 u64_stats_update_begin(&pcpu_stats->syncp);
 742                 pcpu_stats->rx_packets++;
 743                 pcpu_stats->rx_bytes += skb->len;
 744                 if (skb->pkt_type == PACKET_MULTICAST)
 745                         pcpu_stats->rx_multicast++;
 746                 u64_stats_update_end(&pcpu_stats->syncp);
 747
 748                 skb->dev = team->dev;
 749         } else if (res == RX_HANDLER_EXACT) {
 750                 this_cpu_inc(team->pcpu_stats->rx_nohandler);
 751         } else {
 752                 this_cpu_inc(team->pcpu_stats->rx_dropped);
 753         }
 754
 755         return res;
 756 }
 757
 758
 759 /*************************************
 760  * Multiqueue Tx port select override
 761  *************************************/
 762
 763 static int team_queue_override_init(struct team *team)
 764 {
 765         struct list_head *listarr;
 766         unsigned int queue_cnt = team->dev->num_tx_queues - 1;
 767         unsigned int i;
 768
 769         if (!queue_cnt)
 770                 return 0;
 771         listarr = kmalloc_array(queue_cnt, sizeof(struct list_head),
 772                                 GFP_KERNEL);
 773         if (!listarr)
 774                 return -ENOMEM;
 775         team->qom_lists = listarr;
 776         for (i = 0; i < queue_cnt; i++)
 777                 INIT_LIST_HEAD(listarr++);
 778         return 0;
 779 }
 780
 781 static void team_queue_override_fini(struct team *team)
 782 {
 783         kfree(team->qom_lists);
 784 }
 785
 786 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
 787 {
 788         return &team->qom_lists[queue_id - 1];
 789 }
 790
 791 /*
 792  * note: already called with rcu_read_lock
 793  */
 794 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
 795 {
 796         struct list_head *qom_list;
 797         struct team_port *port;
 798
 799         if (!team->queue_override_enabled || !skb->queue_mapping)
 800                 return false;
 801         qom_list = __team_get_qom_list(team, skb->queue_mapping);
 802         list_for_each_entry_rcu(port, qom_list, qom_list) {
 803                 if (!team_dev_queue_xmit(team, port, skb))
 804                         return true;
 805         }
 806         return false;
 807 }
 808
 809 static void __team_queue_override_port_del(struct team *team,
 810                                            struct team_port *port)
 811 {
 812         if (!port->queue_id)
 813                 return;
 814         list_del_rcu(&port->qom_list);
 815 }
 816
 817 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
 818                                                       struct team_port *cur)
 819 {
 820         if (port->priority < cur->priority)
 821                 return true;
 822         if (port->priority > cur->priority)
 823                 return false;
 824         if (port->index < cur->index)
 825                 return true;
 826         return false;
 827 }
 828
 829 static void __team_queue_override_port_add(struct team *team,
 830                                            struct team_port *port)
 831 {
 832         struct team_port *cur;
 833         struct list_head *qom_list;
 834         struct list_head *node;
 835
 836         if (!port->queue_id)
 837                 return;
 838         qom_list = __team_get_qom_list(team, port->queue_id);
 839         node = qom_list;
 840         list_for_each_entry(cur, qom_list, qom_list) {
 841                 if (team_queue_override_port_has_gt_prio_than(port, cur))
 842                         break;
 843                 node = &cur->qom_list;
 844         }
 845         list_add_tail_rcu(&port->qom_list, node);
 846 }
 847
 848 static void __team_queue_override_enabled_check(struct team *team)
 849 {
 850         struct team_port *port;
 851         bool enabled = false;
 852
 853         list_for_each_entry(port, &team->port_list, list) {
 854                 if (port->queue_id) {
 855                         enabled = true;
 856                         break;
 857                 }
 858         }
 859         if (enabled == team->queue_override_enabled)
 860                 return;
 861         netdev_dbg(team->dev, "%s queue override\n",
 862                    enabled ? "Enabling" : "Disabling");
 863         team->queue_override_enabled = enabled;
 864 }
 865
 866 static void team_queue_override_port_prio_changed(struct team *team,
 867                                                   struct team_port *port)
 868 {
 869         if (!port->queue_id || team_port_enabled(port))
 870                 return;
 871         __team_queue_override_port_del(team, port);
 872         __team_queue_override_port_add(team, port);
 873         __team_queue_override_enabled_check(team);
 874 }
 875
 876 static void team_queue_override_port_change_queue_id(struct team *team,
 877                                                      struct team_port *port,
 878                                                      u16 new_queue_id)
 879 {
 880         if (team_port_enabled(port)) {
 881                 __team_queue_override_port_del(team, port);
 882                 port->queue_id = new_queue_id;
 883                 __team_queue_override_port_add(team, port);
 884                 __team_queue_override_enabled_check(team);
 885         } else {
 886                 port->queue_id = new_queue_id;
 887         }
 888 }
 889
 890 static void team_queue_override_port_add(struct team *team,
 891                                          struct team_port *port)
 892 {
 893         __team_queue_override_port_add(team, port);
 894         __team_queue_override_enabled_check(team);
 895 }
 896
 897 static void team_queue_override_port_del(struct team *team,
 898                                          struct team_port *port)
 899 {
 900         __team_queue_override_port_del(team, port);
 901         __team_queue_override_enabled_check(team);
 902 }
 903
 904
 905 /****************
 906  * Port handling
 907  ****************/
 908
 909 static bool team_port_find(const struct team *team,
 910                            const struct team_port *port)
 911 {
 912         struct team_port *cur;
 913
 914         list_for_each_entry(cur, &team->port_list, list)
 915                 if (cur == port)
 916                         return true;
 917         return false;
 918 }
 919
 920 /*
 921  * Enable/disable port by adding to enabled port hashlist and setting
 922  * port->index (Might be racy so reader could see incorrect ifindex when
 923  * processing a flying packet, but that is not a problem). Write guarded
 924  * by team->lock.
 925  */
 926 static void team_port_enable(struct team *team,
 927                              struct team_port *port)
 928 {
 929         if (team_port_enabled(port))
 930                 return;
 931         port->index = team->en_port_count++;
 932         hlist_add_head_rcu(&port->hlist,
 933                            team_port_index_hash(team, port->index));
 934         team_adjust_ops(team);
 935         team_queue_override_port_add(team, port);
 936         if (team->ops.port_enabled)
 937                 team->ops.port_enabled(team, port);
 938         team_notify_peers(team);
 939         team_mcast_rejoin(team);
 940         team_lower_state_changed(port);
 941 }
 942
 943 static void __reconstruct_port_hlist(struct team *team, int rm_index)
 944 {
 945         int i;
 946         struct team_port *port;
 947
 948         for (i = rm_index + 1; i < team->en_port_count; i++) {
 949                 port = team_get_port_by_index(team, i);
 950                 hlist_del_rcu(&port->hlist);
 951                 port->index--;
 952                 hlist_add_head_rcu(&port->hlist,
 953                                    team_port_index_hash(team, port->index));
 954         }
 955 }
 956
 957 static void team_port_disable(struct team *team,
 958                               struct team_port *port)
 959 {
 960         if (!team_port_enabled(port))
 961                 return;
 962         if (team->ops.port_disabled)
 963                 team->ops.port_disabled(team, port);
 964         hlist_del_rcu(&port->hlist);
 965         __reconstruct_port_hlist(team, port->index);
 966         port->index = -1;
 967         team->en_port_count--;
 968         team_queue_override_port_del(team, port);
 969         team_adjust_ops(team);
 970         team_lower_state_changed(port);
 971 }
 972
 973 #define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
 974                             NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
 975                             NETIF_F_HIGHDMA | NETIF_F_LRO)
 976
 977 #define TEAM_ENC_FEATURES       (NETIF_F_HW_CSUM | NETIF_F_SG | \
 978                                  NETIF_F_RXCSUM | NETIF_F_ALL_TSO)
 979
 980 static void __team_compute_features(struct team *team)
 981 {
 982         struct team_port *port;
 983         netdev_features_t vlan_features = TEAM_VLAN_FEATURES &
 984                                           NETIF_F_ALL_FOR_ALL;
 985         netdev_features_t enc_features  = TEAM_ENC_FEATURES;
 986         unsigned short max_hard_header_len = ETH_HLEN;
 987         unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
 988                                         IFF_XMIT_DST_RELEASE_PERM;
 989
 990         list_for_each_entry(port, &team->port_list, list) {
 991                 vlan_features = netdev_increment_features(vlan_features,
 992                                         port->dev->vlan_features,
 993                                         TEAM_VLAN_FEATURES);
 994                 enc_features =
 995                         netdev_increment_features(enc_features,
 996                                                   port->dev->hw_enc_features,
 997                                                   TEAM_ENC_FEATURES);
 998
 999
1000                 dst_release_flag &= port->dev->priv_flags;
1001                 if (port->dev->hard_header_len > max_hard_header_len)
1002                         max_hard_header_len = port->dev->hard_header_len;
1003         }
1004
1005         team->dev->vlan_features = vlan_features;
1006         team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL |
1007                                      NETIF_F_HW_VLAN_CTAG_TX |
1008                                      NETIF_F_HW_VLAN_STAG_TX |
1009                                      NETIF_F_GSO_UDP_L4;
1010         team->dev->hard_header_len = max_hard_header_len;
1011
1012         team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1013         if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1014                 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1015 }
1016
1017 static void team_compute_features(struct team *team)
1018 {
1019         mutex_lock(&team->lock);
1020         __team_compute_features(team);
1021         mutex_unlock(&team->lock);
1022         netdev_change_features(team->dev);
1023 }
1024
1025 static int team_port_enter(struct team *team, struct team_port *port)
1026 {
1027         int err = 0;
1028
1029         dev_hold(team->dev);
1030         if (team->ops.port_enter) {
1031                 err = team->ops.port_enter(team, port);
1032                 if (err) {
1033                         netdev_err(team->dev, "Device %s failed to enter team mode\n",
1034                                    port->dev->name);
1035                         goto err_port_enter;
1036                 }
1037         }
1038
1039         return 0;
1040
1041 err_port_enter:
1042         dev_put(team->dev);
1043
1044         return err;
1045 }
1046
1047 static void team_port_leave(struct team *team, struct team_port *port)
1048 {
1049         if (team->ops.port_leave)
1050                 team->ops.port_leave(team, port);
1051         dev_put(team->dev);
1052 }
1053
1054 #ifdef CONFIG_NET_POLL_CONTROLLER
1055 static int __team_port_enable_netpoll(struct team_port *port)
1056 {
1057         struct netpoll *np;
1058         int err;
1059
1060         np = kzalloc(sizeof(*np), GFP_KERNEL);
1061         if (!np)
1062                 return -ENOMEM;
1063
1064         err = __netpoll_setup(np, port->dev);
1065         if (err) {
1066                 kfree(np);
1067                 return err;
1068         }
1069         port->np = np;
1070         return err;
1071 }
1072
1073 static int team_port_enable_netpoll(struct team_port *port)
1074 {
1075         if (!port->team->dev->npinfo)
1076                 return 0;
1077
1078         return __team_port_enable_netpoll(port);
1079 }
1080
1081 static void team_port_disable_netpoll(struct team_port *port)
1082 {
1083         struct netpoll *np = port->np;
1084
1085         if (!np)
1086                 return;
1087         port->np = NULL;
1088
1089         __netpoll_free(np);
1090 }
1091 #else
1092 static int team_port_enable_netpoll(struct team_port *port)
1093 {
1094         return 0;
1095 }
1096 static void team_port_disable_netpoll(struct team_port *port)
1097 {
1098 }
1099 #endif
1100
1101 static int team_upper_dev_link(struct team *team, struct team_port *port,
1102                                struct netlink_ext_ack *extack)
1103 {
1104         struct netdev_lag_upper_info lag_upper_info;
1105         int err;
1106
1107         lag_upper_info.tx_type = team->mode->lag_tx_type;
1108         lag_upper_info.hash_type = NETDEV_LAG_HASH_UNKNOWN;
1109         err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1110                                            &lag_upper_info, extack);
1111         if (err)
1112                 return err;
1113         port->dev->priv_flags |= IFF_TEAM_PORT;
1114         return 0;
1115 }
1116
1117 static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1118 {
1119         netdev_upper_dev_unlink(port->dev, team->dev);
1120         port->dev->priv_flags &= ~IFF_TEAM_PORT;
1121 }
1122
1123 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1124 static int team_dev_type_check_change(struct net_device *dev,
1125                                       struct net_device *port_dev);
1126
1127 static int team_port_add(struct team *team, struct net_device *port_dev,
1128                          struct netlink_ext_ack *extack)
1129 {
1130         struct net_device *dev = team->dev;
1131         struct team_port *port;
1132         char *portname = port_dev->name;
1133         int err;
1134
1135         if (port_dev->flags & IFF_LOOPBACK) {
1136                 NL_SET_ERR_MSG(extack, "Loopback device can't be added as a team port");
1137                 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1138                            portname);
1139                 return -EINVAL;
1140         }
1141
1142         if (netif_is_team_port(port_dev)) {
1143                 NL_SET_ERR_MSG(extack, "Device is already a port of a team device");
1144                 netdev_err(dev, "Device %s is already a port "
1145                                 "of a team device\n", portname);
1146                 return -EBUSY;
1147         }
1148
1149         if (dev == port_dev) {
1150                 NL_SET_ERR_MSG(extack, "Cannot enslave team device to itself");
1151                 netdev_err(dev, "Cannot enslave team device to itself\n");
1152                 return -EINVAL;
1153         }
1154
1155         if (netdev_has_upper_dev(dev, port_dev)) {
1156                 NL_SET_ERR_MSG(extack, "Device is already an upper device of the team interface");
1157                 netdev_err(dev, "Device %s is already an upper device of the team interface\n",
1158                            portname);
1159                 return -EBUSY;
1160         }
1161
1162         if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1163             vlan_uses_dev(dev)) {
1164                 NL_SET_ERR_MSG(extack, "Device is VLAN challenged and team device has VLAN set up");
1165                 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1166                            portname);
1167                 return -EPERM;
1168         }
1169
1170         err = team_dev_type_check_change(dev, port_dev);
1171         if (err)
1172                 return err;
1173
1174         if (port_dev->flags & IFF_UP) {
1175                 NL_SET_ERR_MSG(extack, "Device is up. Set it down before adding it as a team port");
1176                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1177                            portname);
1178                 return -EBUSY;
1179         }
1180
1181         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1182                        GFP_KERNEL);
1183         if (!port)
1184                 return -ENOMEM;
1185
1186         port->dev = port_dev;
1187         port->team = team;
1188         INIT_LIST_HEAD(&port->qom_list);
1189
1190         port->orig.mtu = port_dev->mtu;
1191         err = dev_set_mtu(port_dev, dev->mtu);
1192         if (err) {
1193                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1194                 goto err_set_mtu;
1195         }
1196
1197         memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1198
1199         err = team_port_enter(team, port);
1200         if (err) {
1201                 netdev_err(dev, "Device %s failed to enter team mode\n",
1202                            portname);
1203                 goto err_port_enter;
1204         }
1205
1206         err = dev_open(port_dev, extack);
1207         if (err) {
1208                 netdev_dbg(dev, "Device %s opening failed\n",
1209                            portname);
1210                 goto err_dev_open;
1211         }
1212
1213         err = vlan_vids_add_by_dev(port_dev, dev);
1214         if (err) {
1215                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1216                                 portname);
1217                 goto err_vids_add;
1218         }
1219
1220         err = team_port_enable_netpoll(port);
1221         if (err) {
1222                 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1223                            portname);
1224                 goto err_enable_netpoll;
1225         }
1226
1227         if (!(dev->features & NETIF_F_LRO))
1228                 dev_disable_lro(port_dev);
1229
1230         err = netdev_rx_handler_register(port_dev, team_handle_frame,
1231                                          port);
1232         if (err) {
1233                 netdev_err(dev, "Device %s failed to register rx_handler\n",
1234                            portname);
1235                 goto err_handler_register;
1236         }
1237
1238         err = team_upper_dev_link(team, port, extack);
1239         if (err) {
1240                 netdev_err(dev, "Device %s failed to set upper link\n",
1241                            portname);
1242                 goto err_set_upper_link;
1243         }
1244
1245         err = __team_option_inst_add_port(team, port);
1246         if (err) {
1247                 netdev_err(dev, "Device %s failed to add per-port options\n",
1248                            portname);
1249                 goto err_option_port_add;
1250         }
1251
1252         /* set promiscuity level to new slave */
1253         if (dev->flags & IFF_PROMISC) {
1254                 err = dev_set_promiscuity(port_dev, 1);
1255                 if (err)
1256                         goto err_set_slave_promisc;
1257         }
1258
1259         /* set allmulti level to new slave */
1260         if (dev->flags & IFF_ALLMULTI) {
1261                 err = dev_set_allmulti(port_dev, 1);
1262                 if (err) {
1263                         if (dev->flags & IFF_PROMISC)
1264                                 dev_set_promiscuity(port_dev, -1);
1265                         goto err_set_slave_promisc;
1266                 }
1267         }
1268
1269         netif_addr_lock_bh(dev);
1270         dev_uc_sync_multiple(port_dev, dev);
1271         dev_mc_sync_multiple(port_dev, dev);
1272         netif_addr_unlock_bh(dev);
1273
1274         port->index = -1;
1275         list_add_tail_rcu(&port->list, &team->port_list);
1276         team_port_enable(team, port);
1277         __team_compute_features(team);
1278         __team_port_change_port_added(port, !!netif_oper_up(port_dev));
1279         __team_options_change_check(team);
1280
1281         netdev_info(dev, "Port device %s added\n", portname);
1282
1283         return 0;
1284
1285 err_set_slave_promisc:
1286         __team_option_inst_del_port(team, port);
1287
1288 err_option_port_add:
1289         team_upper_dev_unlink(team, port);
1290
1291 err_set_upper_link:
1292         netdev_rx_handler_unregister(port_dev);
1293
1294 err_handler_register:
1295         team_port_disable_netpoll(port);
1296
1297 err_enable_netpoll:
1298         vlan_vids_del_by_dev(port_dev, dev);
1299
1300 err_vids_add:
1301         dev_close(port_dev);
1302
1303 err_dev_open:
1304         team_port_leave(team, port);
1305         team_port_set_orig_dev_addr(port);
1306
1307 err_port_enter:
1308         dev_set_mtu(port_dev, port->orig.mtu);
1309
1310 err_set_mtu:
1311         kfree(port);
1312
1313         return err;
1314 }
1315
1316 static void __team_port_change_port_removed(struct team_port *port);
1317
1318 static int team_port_del(struct team *team, struct net_device *port_dev)
1319 {
1320         struct net_device *dev = team->dev;
1321         struct team_port *port;
1322         char *portname = port_dev->name;
1323
1324         port = team_port_get_rtnl(port_dev);
1325         if (!port || !team_port_find(team, port)) {
1326                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1327                            portname);
1328                 return -ENOENT;
1329         }
1330
1331         team_port_disable(team, port);
1332         list_del_rcu(&port->list);
1333
1334         if (dev->flags & IFF_PROMISC)
1335                 dev_set_promiscuity(port_dev, -1);
1336         if (dev->flags & IFF_ALLMULTI)
1337                 dev_set_allmulti(port_dev, -1);
1338
1339         team_upper_dev_unlink(team, port);
1340         netdev_rx_handler_unregister(port_dev);
1341         team_port_disable_netpoll(port);
1342         vlan_vids_del_by_dev(port_dev, dev);
1343         dev_uc_unsync(port_dev, dev);
1344         dev_mc_unsync(port_dev, dev);
1345         dev_close(port_dev);
1346         team_port_leave(team, port);
1347
1348         __team_option_inst_mark_removed_port(team, port);
1349         __team_options_change_check(team);
1350         __team_option_inst_del_port(team, port);
1351         __team_port_change_port_removed(port);
1352
1353         team_port_set_orig_dev_addr(port);
1354         dev_set_mtu(port_dev, port->orig.mtu);
1355         kfree_rcu(port, rcu);
1356         netdev_info(dev, "Port device %s removed\n", portname);
1357         __team_compute_features(team);
1358
1359         return 0;
1360 }
1361
1362
1363 /*****************
1364  * Net device ops
1365  *****************/
1366
1367 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1368 {
1369         ctx->data.str_val = team->mode->kind;
1370         return 0;
1371 }
1372
1373 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1374 {
1375         return team_change_mode(team, ctx->data.str_val);
1376 }
1377
1378 static int team_notify_peers_count_get(struct team *team,
1379                                        struct team_gsetter_ctx *ctx)
1380 {
1381         ctx->data.u32_val = team->notify_peers.count;
1382         return 0;
1383 }
1384
1385 static int team_notify_peers_count_set(struct team *team,
1386                                        struct team_gsetter_ctx *ctx)
1387 {
1388         team->notify_peers.count = ctx->data.u32_val;
1389         return 0;
1390 }
1391
1392 static int team_notify_peers_interval_get(struct team *team,
1393                                           struct team_gsetter_ctx *ctx)
1394 {
1395         ctx->data.u32_val = team->notify_peers.interval;
1396         return 0;
1397 }
1398
1399 static int team_notify_peers_interval_set(struct team *team,
1400                                           struct team_gsetter_ctx *ctx)
1401 {
1402         team->notify_peers.interval = ctx->data.u32_val;
1403         return 0;
1404 }
1405
1406 static int team_mcast_rejoin_count_get(struct team *team,
1407                                        struct team_gsetter_ctx *ctx)
1408 {
1409         ctx->data.u32_val = team->mcast_rejoin.count;
1410         return 0;
1411 }
1412
1413 static int team_mcast_rejoin_count_set(struct team *team,
1414                                        struct team_gsetter_ctx *ctx)
1415 {
1416         team->mcast_rejoin.count = ctx->data.u32_val;
1417         return 0;
1418 }
1419
1420 static int team_mcast_rejoin_interval_get(struct team *team,
1421                                           struct team_gsetter_ctx *ctx)
1422 {
1423         ctx->data.u32_val = team->mcast_rejoin.interval;
1424         return 0;
1425 }
1426
1427 static int team_mcast_rejoin_interval_set(struct team *team,
1428                                           struct team_gsetter_ctx *ctx)
1429 {
1430         team->mcast_rejoin.interval = ctx->data.u32_val;
1431         return 0;
1432 }
1433
1434 static int team_port_en_option_get(struct team *team,
1435                                    struct team_gsetter_ctx *ctx)
1436 {
1437         struct team_port *port = ctx->info->port;
1438
1439         ctx->data.bool_val = team_port_enabled(port);
1440         return 0;
1441 }
1442
1443 static int team_port_en_option_set(struct team *team,
1444                                    struct team_gsetter_ctx *ctx)
1445 {
1446         struct team_port *port = ctx->info->port;
1447
1448         if (ctx->data.bool_val)
1449                 team_port_enable(team, port);
1450         else
1451                 team_port_disable(team, port);
1452         return 0;
1453 }
1454
1455 static int team_user_linkup_option_get(struct team *team,
1456                                        struct team_gsetter_ctx *ctx)
1457 {
1458         struct team_port *port = ctx->info->port;
1459
1460         ctx->data.bool_val = port->user.linkup;
1461         return 0;
1462 }
1463
1464 static void __team_carrier_check(struct team *team);
1465
1466 static int team_user_linkup_option_set(struct team *team,
1467                                        struct team_gsetter_ctx *ctx)
1468 {
1469         struct team_port *port = ctx->info->port;
1470
1471         port->user.linkup = ctx->data.bool_val;
1472         team_refresh_port_linkup(port);
1473         __team_carrier_check(port->team);
1474         return 0;
1475 }
1476
1477 static int team_user_linkup_en_option_get(struct team *team,
1478                                           struct team_gsetter_ctx *ctx)
1479 {
1480         struct team_port *port = ctx->info->port;
1481
1482         ctx->data.bool_val = port->user.linkup_enabled;
1483         return 0;
1484 }
1485
1486 static int team_user_linkup_en_option_set(struct team *team,
1487                                           struct team_gsetter_ctx *ctx)
1488 {
1489         struct team_port *port = ctx->info->port;
1490
1491         port->user.linkup_enabled = ctx->data.bool_val;
1492         team_refresh_port_linkup(port);
1493         __team_carrier_check(port->team);
1494         return 0;
1495 }
1496
1497 static int team_priority_option_get(struct team *team,
1498                                     struct team_gsetter_ctx *ctx)
1499 {
1500         struct team_port *port = ctx->info->port;
1501
1502         ctx->data.s32_val = port->priority;
1503         return 0;
1504 }
1505
1506 static int team_priority_option_set(struct team *team,
1507                                     struct team_gsetter_ctx *ctx)
1508 {
1509         struct team_port *port = ctx->info->port;
1510         s32 priority = ctx->data.s32_val;
1511
1512         if (port->priority == priority)
1513                 return 0;
1514         port->priority = priority;
1515         team_queue_override_port_prio_changed(team, port);
1516         return 0;
1517 }
1518
1519 static int team_queue_id_option_get(struct team *team,
1520                                     struct team_gsetter_ctx *ctx)
1521 {
1522         struct team_port *port = ctx->info->port;
1523
1524         ctx->data.u32_val = port->queue_id;
1525         return 0;
1526 }
1527
1528 static int team_queue_id_option_set(struct team *team,
1529                                     struct team_gsetter_ctx *ctx)
1530 {
1531         struct team_port *port = ctx->info->port;
1532         u16 new_queue_id = ctx->data.u32_val;
1533
1534         if (port->queue_id == new_queue_id)
1535                 return 0;
1536         if (new_queue_id >= team->dev->real_num_tx_queues)
1537                 return -EINVAL;
1538         team_queue_override_port_change_queue_id(team, port, new_queue_id);
1539         return 0;
1540 }
1541
1542 static const struct team_option team_options[] = {
1543         {
1544                 .name = "mode",
1545                 .type = TEAM_OPTION_TYPE_STRING,
1546                 .getter = team_mode_option_get,
1547                 .setter = team_mode_option_set,
1548         },
1549         {
1550                 .name = "notify_peers_count",
1551                 .type = TEAM_OPTION_TYPE_U32,
1552                 .getter = team_notify_peers_count_get,
1553                 .setter = team_notify_peers_count_set,
1554         },
1555         {
1556                 .name = "notify_peers_interval",
1557                 .type = TEAM_OPTION_TYPE_U32,
1558                 .getter = team_notify_peers_interval_get,
1559                 .setter = team_notify_peers_interval_set,
1560         },
1561         {
1562                 .name = "mcast_rejoin_count",
1563                 .type = TEAM_OPTION_TYPE_U32,
1564                 .getter = team_mcast_rejoin_count_get,
1565                 .setter = team_mcast_rejoin_count_set,
1566         },
1567         {
1568                 .name = "mcast_rejoin_interval",
1569                 .type = TEAM_OPTION_TYPE_U32,
1570                 .getter = team_mcast_rejoin_interval_get,
1571                 .setter = team_mcast_rejoin_interval_set,
1572         },
1573         {
1574                 .name = "enabled",
1575                 .type = TEAM_OPTION_TYPE_BOOL,
1576                 .per_port = true,
1577                 .getter = team_port_en_option_get,
1578                 .setter = team_port_en_option_set,
1579         },
1580         {
1581                 .name = "user_linkup",
1582                 .type = TEAM_OPTION_TYPE_BOOL,
1583                 .per_port = true,
1584                 .getter = team_user_linkup_option_get,
1585                 .setter = team_user_linkup_option_set,
1586         },
1587         {
1588                 .name = "user_linkup_enabled",
1589                 .type = TEAM_OPTION_TYPE_BOOL,
1590                 .per_port = true,
1591                 .getter = team_user_linkup_en_option_get,
1592                 .setter = team_user_linkup_en_option_set,
1593         },
1594         {
1595                 .name = "priority",
1596                 .type = TEAM_OPTION_TYPE_S32,
1597                 .per_port = true,
1598                 .getter = team_priority_option_get,
1599                 .setter = team_priority_option_set,
1600         },
1601         {
1602                 .name = "queue_id",
1603                 .type = TEAM_OPTION_TYPE_U32,
1604                 .per_port = true,
1605                 .getter = team_queue_id_option_get,
1606                 .setter = team_queue_id_option_set,
1607         },
1608 };
1609
1610
1611 static int team_init(struct net_device *dev)
1612 {
1613         struct team *team = netdev_priv(dev);
1614         int i;
1615         int err;
1616
1617         team->dev = dev;
1618         mutex_init(&team->lock);
1619         team_set_no_mode(team);
1620
1621         team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1622         if (!team->pcpu_stats)
1623                 return -ENOMEM;
1624
1625         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1626                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1627         INIT_LIST_HEAD(&team->port_list);
1628         err = team_queue_override_init(team);
1629         if (err)
1630                 goto err_team_queue_override_init;
1631
1632         team_adjust_ops(team);
1633
1634         INIT_LIST_HEAD(&team->option_list);
1635         INIT_LIST_HEAD(&team->option_inst_list);
1636
1637         team_notify_peers_init(team);
1638         team_mcast_rejoin_init(team);
1639
1640         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1641         if (err)
1642                 goto err_options_register;
1643         netif_carrier_off(dev);
1644
1645         netdev_lockdep_set_classes(dev);
1646
1647         return 0;
1648
1649 err_options_register:
1650         team_mcast_rejoin_fini(team);
1651         team_notify_peers_fini(team);
1652         team_queue_override_fini(team);
1653 err_team_queue_override_init:
1654         free_percpu(team->pcpu_stats);
1655
1656         return err;
1657 }
1658
1659 static void team_uninit(struct net_device *dev)
1660 {
1661         struct team *team = netdev_priv(dev);
1662         struct team_port *port;
1663         struct team_port *tmp;
1664
1665         mutex_lock(&team->lock);
1666         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1667                 team_port_del(team, port->dev);
1668
1669         __team_change_mode(team, NULL); /* cleanup */
1670         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1671         team_mcast_rejoin_fini(team);
1672         team_notify_peers_fini(team);
1673         team_queue_override_fini(team);
1674         mutex_unlock(&team->lock);
1675         netdev_change_features(dev);
1676 }
1677
1678 static void team_destructor(struct net_device *dev)
1679 {
1680         struct team *team = netdev_priv(dev);
1681
1682         free_percpu(team->pcpu_stats);
1683 }
1684
1685 static int team_open(struct net_device *dev)
1686 {
1687         return 0;
1688 }
1689
1690 static int team_close(struct net_device *dev)
1691 {
1692         return 0;
1693 }
1694
1695 /*
1696  * note: already called with rcu_read_lock
1697  */
1698 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1699 {
1700         struct team *team = netdev_priv(dev);
1701         bool tx_success;
1702         unsigned int len = skb->len;
1703
1704         tx_success = team_queue_override_transmit(team, skb);
1705         if (!tx_success)
1706                 tx_success = team->ops.transmit(team, skb);
1707         if (tx_success) {
1708                 struct team_pcpu_stats *pcpu_stats;
1709
1710                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1711                 u64_stats_update_begin(&pcpu_stats->syncp);
1712                 pcpu_stats->tx_packets++;
1713                 pcpu_stats->tx_bytes += len;
1714                 u64_stats_update_end(&pcpu_stats->syncp);
1715         } else {
1716                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1717         }
1718
1719         return NETDEV_TX_OK;
1720 }
1721
1722 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1723                              struct net_device *sb_dev)
1724 {
1725         /*
1726          * This helper function exists to help dev_pick_tx get the correct
1727          * destination queue.  Using a helper function skips a call to
1728          * skb_tx_hash and will put the skbs in the queue we expect on their
1729          * way down to the team driver.
1730          */
1731         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1732
1733         /*
1734          * Save the original txq to restore before passing to the driver
1735          */
1736         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1737
1738         if (unlikely(txq >= dev->real_num_tx_queues)) {
1739                 do {
1740                         txq -= dev->real_num_tx_queues;
1741                 } while (txq >= dev->real_num_tx_queues);
1742         }
1743         return txq;
1744 }
1745
1746 static void team_change_rx_flags(struct net_device *dev, int change)
1747 {
1748         struct team *team = netdev_priv(dev);
1749         struct team_port *port;
1750         int inc;
1751
1752         rcu_read_lock();
1753         list_for_each_entry_rcu(port, &team->port_list, list) {
1754                 if (change & IFF_PROMISC) {
1755                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1756                         dev_set_promiscuity(port->dev, inc);
1757                 }
1758                 if (change & IFF_ALLMULTI) {
1759                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1760                         dev_set_allmulti(port->dev, inc);
1761                 }
1762         }
1763         rcu_read_unlock();
1764 }
1765
1766 static void team_set_rx_mode(struct net_device *dev)
1767 {
1768         struct team *team = netdev_priv(dev);
1769         struct team_port *port;
1770
1771         rcu_read_lock();
1772         list_for_each_entry_rcu(port, &team->port_list, list) {
1773                 dev_uc_sync_multiple(port->dev, dev);
1774                 dev_mc_sync_multiple(port->dev, dev);
1775         }
1776         rcu_read_unlock();
1777 }
1778
1779 static int team_set_mac_address(struct net_device *dev, void *p)
1780 {
1781         struct sockaddr *addr = p;
1782         struct team *team = netdev_priv(dev);
1783         struct team_port *port;
1784
1785         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1786                 return -EADDRNOTAVAIL;
1787         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1788         mutex_lock(&team->lock);
1789         list_for_each_entry(port, &team->port_list, list)
1790                 if (team->ops.port_change_dev_addr)
1791                         team->ops.port_change_dev_addr(team, port);
1792         mutex_unlock(&team->lock);
1793         return 0;
1794 }
1795
1796 static int team_change_mtu(struct net_device *dev, int new_mtu)
1797 {
1798         struct team *team = netdev_priv(dev);
1799         struct team_port *port;
1800         int err;
1801
1802         /*
1803          * Alhough this is reader, it's guarded by team lock. It's not possible
1804          * to traverse list in reverse under rcu_read_lock
1805          */
1806         mutex_lock(&team->lock);
1807         team->port_mtu_change_allowed = true;
1808         list_for_each_entry(port, &team->port_list, list) {
1809                 err = dev_set_mtu(port->dev, new_mtu);
1810                 if (err) {
1811                         netdev_err(dev, "Device %s failed to change mtu",
1812                                    port->dev->name);
1813                         goto unwind;
1814                 }
1815         }
1816         team->port_mtu_change_allowed = false;
1817         mutex_unlock(&team->lock);
1818
1819         dev->mtu = new_mtu;
1820
1821         return 0;
1822
1823 unwind:
1824         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1825                 dev_set_mtu(port->dev, dev->mtu);
1826         team->port_mtu_change_allowed = false;
1827         mutex_unlock(&team->lock);
1828
1829         return err;
1830 }
1831
1832 static void
1833 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1834 {
1835         struct team *team = netdev_priv(dev);
1836         struct team_pcpu_stats *p;
1837         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1838         u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1839         unsigned int start;
1840         int i;
1841
1842         for_each_possible_cpu(i) {
1843                 p = per_cpu_ptr(team->pcpu_stats, i);
1844                 do {
1845                         start = u64_stats_fetch_begin_irq(&p->syncp);
1846                         rx_packets      = p->rx_packets;
1847                         rx_bytes        = p->rx_bytes;
1848                         rx_multicast    = p->rx_multicast;
1849                         tx_packets      = p->tx_packets;
1850                         tx_bytes        = p->tx_bytes;
1851                 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1852
1853                 stats->rx_packets       += rx_packets;
1854                 stats->rx_bytes         += rx_bytes;
1855                 stats->multicast        += rx_multicast;
1856                 stats->tx_packets       += tx_packets;
1857                 stats->tx_bytes         += tx_bytes;
1858                 /*
1859                  * rx_dropped, tx_dropped & rx_nohandler are u32,
1860                  * updated without syncp protection.
1861                  */
1862                 rx_dropped      += p->rx_dropped;
1863                 tx_dropped      += p->tx_dropped;
1864                 rx_nohandler    += p->rx_nohandler;
1865         }
1866         stats->rx_dropped       = rx_dropped;
1867         stats->tx_dropped       = tx_dropped;
1868         stats->rx_nohandler     = rx_nohandler;
1869 }
1870
1871 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1872 {
1873         struct team *team = netdev_priv(dev);
1874         struct team_port *port;
1875         int err;
1876
1877         /*
1878          * Alhough this is reader, it's guarded by team lock. It's not possible
1879          * to traverse list in reverse under rcu_read_lock
1880          */
1881         mutex_lock(&team->lock);
1882         list_for_each_entry(port, &team->port_list, list) {
1883                 err = vlan_vid_add(port->dev, proto, vid);
1884                 if (err)
1885                         goto unwind;
1886         }
1887         mutex_unlock(&team->lock);
1888
1889         return 0;
1890
1891 unwind:
1892         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1893                 vlan_vid_del(port->dev, proto, vid);
1894         mutex_unlock(&team->lock);
1895
1896         return err;
1897 }
1898
1899 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1900 {
1901         struct team *team = netdev_priv(dev);
1902         struct team_port *port;
1903
1904         mutex_lock(&team->lock);
1905         list_for_each_entry(port, &team->port_list, list)
1906                 vlan_vid_del(port->dev, proto, vid);
1907         mutex_unlock(&team->lock);
1908
1909         return 0;
1910 }
1911
1912 #ifdef CONFIG_NET_POLL_CONTROLLER
1913 static void team_poll_controller(struct net_device *dev)
1914 {
1915 }
1916
1917 static void __team_netpoll_cleanup(struct team *team)
1918 {
1919         struct team_port *port;
1920
1921         list_for_each_entry(port, &team->port_list, list)
1922                 team_port_disable_netpoll(port);
1923 }
1924
1925 static void team_netpoll_cleanup(struct net_device *dev)
1926 {
1927         struct team *team = netdev_priv(dev);
1928
1929         mutex_lock(&team->lock);
1930         __team_netpoll_cleanup(team);
1931         mutex_unlock(&team->lock);
1932 }
1933
1934 static int team_netpoll_setup(struct net_device *dev,
1935                               struct netpoll_info *npifo)
1936 {
1937         struct team *team = netdev_priv(dev);
1938         struct team_port *port;
1939         int err = 0;
1940
1941         mutex_lock(&team->lock);
1942         list_for_each_entry(port, &team->port_list, list) {
1943                 err = __team_port_enable_netpoll(port);
1944                 if (err) {
1945                         __team_netpoll_cleanup(team);
1946                         break;
1947                 }
1948         }
1949         mutex_unlock(&team->lock);
1950         return err;
1951 }
1952 #endif
1953
1954 static int team_add_slave(struct net_device *dev, struct net_device *port_dev,
1955                           struct netlink_ext_ack *extack)
1956 {
1957         struct team *team = netdev_priv(dev);
1958         int err;
1959
1960         mutex_lock(&team->lock);
1961         err = team_port_add(team, port_dev, extack);
1962         mutex_unlock(&team->lock);
1963
1964         if (!err)
1965                 netdev_change_features(dev);
1966
1967         return err;
1968 }
1969
1970 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1971 {
1972         struct team *team = netdev_priv(dev);
1973         int err;
1974
1975         mutex_lock(&team->lock);
1976         err = team_port_del(team, port_dev);
1977         mutex_unlock(&team->lock);
1978
1979         if (!err)
1980                 netdev_change_features(dev);
1981
1982         return err;
1983 }
1984
1985 static netdev_features_t team_fix_features(struct net_device *dev,
1986                                            netdev_features_t features)
1987 {
1988         struct team_port *port;
1989         struct team *team = netdev_priv(dev);
1990         netdev_features_t mask;
1991
1992         mask = features;
1993         features &= ~NETIF_F_ONE_FOR_ALL;
1994         features |= NETIF_F_ALL_FOR_ALL;
1995
1996         rcu_read_lock();
1997         list_for_each_entry_rcu(port, &team->port_list, list) {
1998                 features = netdev_increment_features(features,
1999                                                      port->dev->features,
2000                                                      mask);
2001         }
2002         rcu_read_unlock();
2003
2004         features = netdev_add_tso_features(features, mask);
2005
2006         return features;
2007 }
2008
2009 static int team_change_carrier(struct net_device *dev, bool new_carrier)
2010 {
2011         struct team *team = netdev_priv(dev);
2012
2013         team->user_carrier_enabled = true;
2014
2015         if (new_carrier)
2016                 netif_carrier_on(dev);
2017         else
2018                 netif_carrier_off(dev);
2019         return 0;
2020 }
2021
2022 static const struct net_device_ops team_netdev_ops = {
2023         .ndo_init               = team_init,
2024         .ndo_uninit             = team_uninit,
2025         .ndo_open               = team_open,
2026         .ndo_stop               = team_close,
2027         .ndo_start_xmit         = team_xmit,
2028         .ndo_select_queue       = team_select_queue,
2029         .ndo_change_rx_flags    = team_change_rx_flags,
2030         .ndo_set_rx_mode        = team_set_rx_mode,
2031         .ndo_set_mac_address    = team_set_mac_address,
2032         .ndo_change_mtu         = team_change_mtu,
2033         .ndo_get_stats64        = team_get_stats64,
2034         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
2035         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
2036 #ifdef CONFIG_NET_POLL_CONTROLLER
2037         .ndo_poll_controller    = team_poll_controller,
2038         .ndo_netpoll_setup      = team_netpoll_setup,
2039         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
2040 #endif
2041         .ndo_add_slave          = team_add_slave,
2042         .ndo_del_slave          = team_del_slave,
2043         .ndo_fix_features       = team_fix_features,
2044         .ndo_change_carrier     = team_change_carrier,
2045         .ndo_features_check     = passthru_features_check,
2046 };
2047
2048 /***********************
2049  * ethtool interface
2050  ***********************/
2051
2052 static void team_ethtool_get_drvinfo(struct net_device *dev,
2053                                      struct ethtool_drvinfo *drvinfo)
2054 {
2055         strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2056         strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2057 }
2058
2059 static int team_ethtool_get_link_ksettings(struct net_device *dev,
2060                                            struct ethtool_link_ksettings *cmd)
2061 {
2062         struct team *team= netdev_priv(dev);
2063         unsigned long speed = 0;
2064         struct team_port *port;
2065
2066         cmd->base.duplex = DUPLEX_UNKNOWN;
2067         cmd->base.port = PORT_OTHER;
2068
2069         list_for_each_entry(port, &team->port_list, list) {
2070                 if (team_port_txable(port)) {
2071                         if (port->state.speed != SPEED_UNKNOWN)
2072                                 speed += port->state.speed;
2073                         if (cmd->base.duplex == DUPLEX_UNKNOWN &&
2074                             port->state.duplex != DUPLEX_UNKNOWN)
2075                                 cmd->base.duplex = port->state.duplex;
2076                 }
2077         }
2078         cmd->base.speed = speed ? : SPEED_UNKNOWN;
2079
2080         return 0;
2081 }
2082
2083 static const struct ethtool_ops team_ethtool_ops = {
2084         .get_drvinfo            = team_ethtool_get_drvinfo,
2085         .get_link               = ethtool_op_get_link,
2086         .get_link_ksettings     = team_ethtool_get_link_ksettings,
2087 };
2088
2089 /***********************
2090  * rt netlink interface
2091  ***********************/
2092
2093 static void team_setup_by_port(struct net_device *dev,
2094                                struct net_device *port_dev)
2095 {
2096         dev->header_ops = port_dev->header_ops;
2097         dev->type = port_dev->type;
2098         dev->hard_header_len = port_dev->hard_header_len;
2099         dev->addr_len = port_dev->addr_len;
2100         dev->mtu = port_dev->mtu;
2101         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2102         eth_hw_addr_inherit(dev, port_dev);
2103 }
2104
2105 static int team_dev_type_check_change(struct net_device *dev,
2106                                       struct net_device *port_dev)
2107 {
2108         struct team *team = netdev_priv(dev);
2109         char *portname = port_dev->name;
2110         int err;
2111
2112         if (dev->type == port_dev->type)
2113                 return 0;
2114         if (!list_empty(&team->port_list)) {
2115                 netdev_err(dev, "Device %s is of different type\n", portname);
2116                 return -EBUSY;
2117         }
2118         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2119         err = notifier_to_errno(err);
2120         if (err) {
2121                 netdev_err(dev, "Refused to change device type\n");
2122                 return err;
2123         }
2124         dev_uc_flush(dev);
2125         dev_mc_flush(dev);
2126         team_setup_by_port(dev, port_dev);
2127         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2128         return 0;
2129 }
2130
2131 static void team_setup(struct net_device *dev)
2132 {
2133         ether_setup(dev);
2134         dev->max_mtu = ETH_MAX_MTU;
2135
2136         dev->netdev_ops = &team_netdev_ops;
2137         dev->ethtool_ops = &team_ethtool_ops;
2138         dev->needs_free_netdev = true;
2139         dev->priv_destructor = team_destructor;
2140         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2141         dev->priv_flags |= IFF_NO_QUEUE;
2142         dev->priv_flags |= IFF_TEAM;
2143
2144         /*
2145          * Indicate we support unicast address filtering. That way core won't
2146          * bring us to promisc mode in case a unicast addr is added.
2147          * Let this up to underlay drivers.
2148          */
2149         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2150
2151         dev->features |= NETIF_F_LLTX;
2152         dev->features |= NETIF_F_GRO;
2153
2154         /* Don't allow team devices to change network namespaces. */
2155         dev->features |= NETIF_F_NETNS_LOCAL;
2156
2157         dev->hw_features = TEAM_VLAN_FEATURES |
2158                            NETIF_F_HW_VLAN_CTAG_RX |
2159                            NETIF_F_HW_VLAN_CTAG_FILTER;
2160
2161         dev->hw_features |= NETIF_F_GSO_ENCAP_ALL | NETIF_F_GSO_UDP_L4;
2162         dev->features |= dev->hw_features;
2163         dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
2164 }
2165
2166 static int team_newlink(struct net *src_net, struct net_device *dev,
2167                         struct nlattr *tb[], struct nlattr *data[],
2168                         struct netlink_ext_ack *extack)
2169 {
2170         if (tb[IFLA_ADDRESS] == NULL)
2171                 eth_hw_addr_random(dev);
2172
2173         return register_netdevice(dev);
2174 }
2175
2176 static int team_validate(struct nlattr *tb[], struct nlattr *data[],
2177                          struct netlink_ext_ack *extack)
2178 {
2179         if (tb[IFLA_ADDRESS]) {
2180                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2181                         return -EINVAL;
2182                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2183                         return -EADDRNOTAVAIL;
2184         }
2185         return 0;
2186 }
2187
2188 static unsigned int team_get_num_tx_queues(void)
2189 {
2190         return TEAM_DEFAULT_NUM_TX_QUEUES;
2191 }
2192
2193 static unsigned int team_get_num_rx_queues(void)
2194 {
2195         return TEAM_DEFAULT_NUM_RX_QUEUES;
2196 }
2197
2198 static struct rtnl_link_ops team_link_ops __read_mostly = {
2199         .kind                   = DRV_NAME,
2200         .priv_size              = sizeof(struct team),
2201         .setup                  = team_setup,
2202         .newlink                = team_newlink,
2203         .validate               = team_validate,
2204         .get_num_tx_queues      = team_get_num_tx_queues,
2205         .get_num_rx_queues      = team_get_num_rx_queues,
2206 };
2207
2208
2209 /***********************************
2210  * Generic netlink custom interface
2211  ***********************************/
2212
2213 static struct genl_family team_nl_family;
2214
2215 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2216         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
2217         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
2218         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
2219         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
2220 };
2221
2222 static const struct nla_policy
2223 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2224         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
2225         [TEAM_ATTR_OPTION_NAME] = {
2226                 .type = NLA_STRING,
2227                 .len = TEAM_STRING_MAX_LEN,
2228         },
2229         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
2230         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
2231         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
2232 };
2233
2234 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2235 {
2236         struct sk_buff *msg;
2237         void *hdr;
2238         int err;
2239
2240         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2241         if (!msg)
2242                 return -ENOMEM;
2243
2244         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2245                           &team_nl_family, 0, TEAM_CMD_NOOP);
2246         if (!hdr) {
2247                 err = -EMSGSIZE;
2248                 goto err_msg_put;
2249         }
2250
2251         genlmsg_end(msg, hdr);
2252
2253         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2254
2255 err_msg_put:
2256         nlmsg_free(msg);
2257
2258         return err;
2259 }
2260
2261 /*
2262  * Netlink cmd functions should be locked by following two functions.
2263  * Since dev gets held here, that ensures dev won't disappear in between.
2264  */
2265 static struct team *team_nl_team_get(struct genl_info *info)
2266 {
2267         struct net *net = genl_info_net(info);
2268         int ifindex;
2269         struct net_device *dev;
2270         struct team *team;
2271
2272         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2273                 return NULL;
2274
2275         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2276         dev = dev_get_by_index(net, ifindex);
2277         if (!dev || dev->netdev_ops != &team_netdev_ops) {
2278                 if (dev)
2279                         dev_put(dev);
2280                 return NULL;
2281         }
2282
2283         team = netdev_priv(dev);
2284         mutex_lock(&team->lock);
2285         return team;
2286 }
2287
2288 static void team_nl_team_put(struct team *team)
2289 {
2290         mutex_unlock(&team->lock);
2291         dev_put(team->dev);
2292 }
2293
2294 typedef int team_nl_send_func_t(struct sk_buff *skb,
2295                                 struct team *team, u32 portid);
2296
2297 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2298 {
2299         return genlmsg_unicast(dev_net(team->dev), skb, portid);
2300 }
2301
2302 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2303                                        struct team_option_inst *opt_inst)
2304 {
2305         struct nlattr *option_item;
2306         struct team_option *option = opt_inst->option;
2307         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2308         struct team_gsetter_ctx ctx;
2309         int err;
2310
2311         ctx.info = opt_inst_info;
2312         err = team_option_get(team, opt_inst, &ctx);
2313         if (err)
2314                 return err;
2315
2316         option_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_OPTION);
2317         if (!option_item)
2318                 return -EMSGSIZE;
2319
2320         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2321                 goto nest_cancel;
2322         if (opt_inst_info->port &&
2323             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2324                         opt_inst_info->port->dev->ifindex))
2325                 goto nest_cancel;
2326         if (opt_inst->option->array_size &&
2327             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2328                         opt_inst_info->array_index))
2329                 goto nest_cancel;
2330
2331         switch (option->type) {
2332         case TEAM_OPTION_TYPE_U32:
2333                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2334                         goto nest_cancel;
2335                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2336                         goto nest_cancel;
2337                 break;
2338         case TEAM_OPTION_TYPE_STRING:
2339                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2340                         goto nest_cancel;
2341                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2342                                    ctx.data.str_val))
2343                         goto nest_cancel;
2344                 break;
2345         case TEAM_OPTION_TYPE_BINARY:
2346                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2347                         goto nest_cancel;
2348                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2349                             ctx.data.bin_val.ptr))
2350                         goto nest_cancel;
2351                 break;
2352         case TEAM_OPTION_TYPE_BOOL:
2353                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2354                         goto nest_cancel;
2355                 if (ctx.data.bool_val &&
2356                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2357                         goto nest_cancel;
2358                 break;
2359         case TEAM_OPTION_TYPE_S32:
2360                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2361                         goto nest_cancel;
2362                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2363                         goto nest_cancel;
2364                 break;
2365         default:
2366                 BUG();
2367         }
2368         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2369                 goto nest_cancel;
2370         if (opt_inst->changed) {
2371                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2372                         goto nest_cancel;
2373                 opt_inst->changed = false;
2374         }
2375         nla_nest_end(skb, option_item);
2376         return 0;
2377
2378 nest_cancel:
2379         nla_nest_cancel(skb, option_item);
2380         return -EMSGSIZE;
2381 }
2382
2383 static int __send_and_alloc_skb(struct sk_buff **pskb,
2384                                 struct team *team, u32 portid,
2385                                 team_nl_send_func_t *send_func)
2386 {
2387         int err;
2388
2389         if (*pskb) {
2390                 err = send_func(*pskb, team, portid);
2391                 if (err)
2392                         return err;
2393         }
2394         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2395         if (!*pskb)
2396                 return -ENOMEM;
2397         return 0;
2398 }
2399
2400 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2401                                     int flags, team_nl_send_func_t *send_func,
2402                                     struct list_head *sel_opt_inst_list)
2403 {
2404         struct nlattr *option_list;
2405         struct nlmsghdr *nlh;
2406         void *hdr;
2407         struct team_option_inst *opt_inst;
2408         int err;
2409         struct sk_buff *skb = NULL;
2410         bool incomplete;
2411         int i;
2412
2413         opt_inst = list_first_entry(sel_opt_inst_list,
2414                                     struct team_option_inst, tmp_list);
2415
2416 start_again:
2417         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2418         if (err)
2419                 return err;
2420
2421         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2422                           TEAM_CMD_OPTIONS_GET);
2423         if (!hdr) {
2424                 nlmsg_free(skb);
2425                 return -EMSGSIZE;
2426         }
2427
2428         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2429                 goto nla_put_failure;
2430         option_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_OPTION);
2431         if (!option_list)
2432                 goto nla_put_failure;
2433
2434         i = 0;
2435         incomplete = false;
2436         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2437                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2438                 if (err) {
2439                         if (err == -EMSGSIZE) {
2440                                 if (!i)
2441                                         goto errout;
2442                                 incomplete = true;
2443                                 break;
2444                         }
2445                         goto errout;
2446                 }
2447                 i++;
2448         }
2449
2450         nla_nest_end(skb, option_list);
2451         genlmsg_end(skb, hdr);
2452         if (incomplete)
2453                 goto start_again;
2454
2455 send_done:
2456         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2457         if (!nlh) {
2458                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2459                 if (err)
2460                         return err;
2461                 goto send_done;
2462         }
2463
2464         return send_func(skb, team, portid);
2465
2466 nla_put_failure:
2467         err = -EMSGSIZE;
2468 errout:
2469         nlmsg_free(skb);
2470         return err;
2471 }
2472
2473 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2474 {
2475         struct team *team;
2476         struct team_option_inst *opt_inst;
2477         int err;
2478         LIST_HEAD(sel_opt_inst_list);
2479
2480         team = team_nl_team_get(info);
2481         if (!team)
2482                 return -EINVAL;
2483
2484         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2485                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2486         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2487                                        NLM_F_ACK, team_nl_send_unicast,
2488                                        &sel_opt_inst_list);
2489
2490         team_nl_team_put(team);
2491
2492         return err;
2493 }
2494
2495 static int team_nl_send_event_options_get(struct team *team,
2496                                           struct list_head *sel_opt_inst_list);
2497
2498 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2499 {
2500         struct team *team;
2501         int err = 0;
2502         int i;
2503         struct nlattr *nl_option;
2504
2505         rtnl_lock();
2506
2507         team = team_nl_team_get(info);
2508         if (!team) {
2509                 err = -EINVAL;
2510                 goto rtnl_unlock;
2511         }
2512
2513         err = -EINVAL;
2514         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2515                 err = -EINVAL;
2516                 goto team_put;
2517         }
2518
2519         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2520                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2521                 struct nlattr *attr;
2522                 struct nlattr *attr_data;
2523                 LIST_HEAD(opt_inst_list);
2524                 enum team_option_type opt_type;
2525                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2526                 u32 opt_array_index = 0;
2527                 bool opt_is_array = false;
2528                 struct team_option_inst *opt_inst;
2529                 char *opt_name;
2530                 bool opt_found = false;
2531
2532                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2533                         err = -EINVAL;
2534                         goto team_put;
2535                 }
2536                 err = nla_parse_nested_deprecated(opt_attrs,
2537                                                   TEAM_ATTR_OPTION_MAX,
2538                                                   nl_option,
2539                                                   team_nl_option_policy,
2540                                                   info->extack);
2541                 if (err)
2542                         goto team_put;
2543                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2544                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2545                         err = -EINVAL;
2546                         goto team_put;
2547                 }
2548                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2549                 case NLA_U32:
2550                         opt_type = TEAM_OPTION_TYPE_U32;
2551                         break;
2552                 case NLA_STRING:
2553                         opt_type = TEAM_OPTION_TYPE_STRING;
2554                         break;
2555                 case NLA_BINARY:
2556                         opt_type = TEAM_OPTION_TYPE_BINARY;
2557                         break;
2558                 case NLA_FLAG:
2559                         opt_type = TEAM_OPTION_TYPE_BOOL;
2560                         break;
2561                 case NLA_S32:
2562                         opt_type = TEAM_OPTION_TYPE_S32;
2563                         break;
2564                 default:
2565                         goto team_put;
2566                 }
2567
2568                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2569                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2570                         err = -EINVAL;
2571                         goto team_put;
2572                 }
2573
2574                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2575                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2576                 if (attr)
2577                         opt_port_ifindex = nla_get_u32(attr);
2578
2579                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2580                 if (attr) {
2581                         opt_is_array = true;
2582                         opt_array_index = nla_get_u32(attr);
2583                 }
2584
2585                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2586                         struct team_option *option = opt_inst->option;
2587                         struct team_gsetter_ctx ctx;
2588                         struct team_option_inst_info *opt_inst_info;
2589                         int tmp_ifindex;
2590
2591                         opt_inst_info = &opt_inst->info;
2592                         tmp_ifindex = opt_inst_info->port ?
2593                                       opt_inst_info->port->dev->ifindex : 0;
2594                         if (option->type != opt_type ||
2595                             strcmp(option->name, opt_name) ||
2596                             tmp_ifindex != opt_port_ifindex ||
2597                             (option->array_size && !opt_is_array) ||
2598                             opt_inst_info->array_index != opt_array_index)
2599                                 continue;
2600                         opt_found = true;
2601                         ctx.info = opt_inst_info;
2602                         switch (opt_type) {
2603                         case TEAM_OPTION_TYPE_U32:
2604                                 ctx.data.u32_val = nla_get_u32(attr_data);
2605                                 break;
2606                         case TEAM_OPTION_TYPE_STRING:
2607                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2608                                         err = -EINVAL;
2609                                         goto team_put;
2610                                 }
2611                                 ctx.data.str_val = nla_data(attr_data);
2612                                 break;
2613                         case TEAM_OPTION_TYPE_BINARY:
2614                                 ctx.data.bin_val.len = nla_len(attr_data);
2615                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2616                                 break;
2617                         case TEAM_OPTION_TYPE_BOOL:
2618                                 ctx.data.bool_val = attr_data ? true : false;
2619                                 break;
2620                         case TEAM_OPTION_TYPE_S32:
2621                                 ctx.data.s32_val = nla_get_s32(attr_data);
2622                                 break;
2623                         default:
2624                                 BUG();
2625                         }
2626                         err = team_option_set(team, opt_inst, &ctx);
2627                         if (err)
2628                                 goto team_put;
2629                         opt_inst->changed = true;
2630                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2631                 }
2632                 if (!opt_found) {
2633                         err = -ENOENT;
2634                         goto team_put;
2635                 }
2636
2637                 err = team_nl_send_event_options_get(team, &opt_inst_list);
2638                 if (err)
2639                         break;
2640         }
2641
2642 team_put:
2643         team_nl_team_put(team);
2644 rtnl_unlock:
2645         rtnl_unlock();
2646         return err;
2647 }
2648
2649 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2650                                      struct team_port *port)
2651 {
2652         struct nlattr *port_item;
2653
2654         port_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_PORT);
2655         if (!port_item)
2656                 goto nest_cancel;
2657         if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2658                 goto nest_cancel;
2659         if (port->changed) {
2660                 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2661                         goto nest_cancel;
2662                 port->changed = false;
2663         }
2664         if ((port->removed &&
2665              nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2666             (port->state.linkup &&
2667              nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2668             nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2669             nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2670                 goto nest_cancel;
2671         nla_nest_end(skb, port_item);
2672         return 0;
2673
2674 nest_cancel:
2675         nla_nest_cancel(skb, port_item);
2676         return -EMSGSIZE;
2677 }
2678
2679 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2680                                       int flags, team_nl_send_func_t *send_func,
2681                                       struct team_port *one_port)
2682 {
2683         struct nlattr *port_list;
2684         struct nlmsghdr *nlh;
2685         void *hdr;
2686         struct team_port *port;
2687         int err;
2688         struct sk_buff *skb = NULL;
2689         bool incomplete;
2690         int i;
2691
2692         port = list_first_entry_or_null(&team->port_list,
2693                                         struct team_port, list);
2694
2695 start_again:
2696         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2697         if (err)
2698                 return err;
2699
2700         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2701                           TEAM_CMD_PORT_LIST_GET);
2702         if (!hdr) {
2703                 nlmsg_free(skb);
2704                 return -EMSGSIZE;
2705         }
2706
2707         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2708                 goto nla_put_failure;
2709         port_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_PORT);
2710         if (!port_list)
2711                 goto nla_put_failure;
2712
2713         i = 0;
2714         incomplete = false;
2715
2716         /* If one port is selected, called wants to send port list containing
2717          * only this port. Otherwise go through all listed ports and send all
2718          */
2719         if (one_port) {
2720                 err = team_nl_fill_one_port_get(skb, one_port);
2721                 if (err)
2722                         goto errout;
2723         } else if (port) {
2724                 list_for_each_entry_from(port, &team->port_list, list) {
2725                         err = team_nl_fill_one_port_get(skb, port);
2726                         if (err) {
2727                                 if (err == -EMSGSIZE) {
2728                                         if (!i)
2729                                                 goto errout;
2730                                         incomplete = true;
2731                                         break;
2732                                 }
2733                                 goto errout;
2734                         }
2735                         i++;
2736                 }
2737         }
2738
2739         nla_nest_end(skb, port_list);
2740         genlmsg_end(skb, hdr);
2741         if (incomplete)
2742                 goto start_again;
2743
2744 send_done:
2745         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2746         if (!nlh) {
2747                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2748                 if (err)
2749                         return err;
2750                 goto send_done;
2751         }
2752
2753         return send_func(skb, team, portid);
2754
2755 nla_put_failure:
2756         err = -EMSGSIZE;
2757 errout:
2758         nlmsg_free(skb);
2759         return err;
2760 }
2761
2762 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2763                                      struct genl_info *info)
2764 {
2765         struct team *team;
2766         int err;
2767
2768         team = team_nl_team_get(info);
2769         if (!team)
2770                 return -EINVAL;
2771
2772         err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2773                                          NLM_F_ACK, team_nl_send_unicast, NULL);
2774
2775         team_nl_team_put(team);
2776
2777         return err;
2778 }
2779
2780 static const struct genl_ops team_nl_ops[] = {
2781         {
2782                 .cmd = TEAM_CMD_NOOP,
2783                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2784                 .doit = team_nl_cmd_noop,
2785         },
2786         {
2787                 .cmd = TEAM_CMD_OPTIONS_SET,
2788                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2789                 .doit = team_nl_cmd_options_set,
2790                 .flags = GENL_ADMIN_PERM,
2791         },
2792         {
2793                 .cmd = TEAM_CMD_OPTIONS_GET,
2794                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2795                 .doit = team_nl_cmd_options_get,
2796                 .flags = GENL_ADMIN_PERM,
2797         },
2798         {
2799                 .cmd = TEAM_CMD_PORT_LIST_GET,
2800                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2801                 .doit = team_nl_cmd_port_list_get,
2802                 .flags = GENL_ADMIN_PERM,
2803         },
2804 };
2805
2806 static const struct genl_multicast_group team_nl_mcgrps[] = {
2807         { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2808 };
2809
2810 static struct genl_family team_nl_family __ro_after_init = {
2811         .name           = TEAM_GENL_NAME,
2812         .version        = TEAM_GENL_VERSION,
2813         .maxattr        = TEAM_ATTR_MAX,
2814         .policy = team_nl_policy,
2815         .netnsok        = true,
2816         .module         = THIS_MODULE,
2817         .ops            = team_nl_ops,
2818         .n_ops          = ARRAY_SIZE(team_nl_ops),
2819         .mcgrps         = team_nl_mcgrps,
2820         .n_mcgrps       = ARRAY_SIZE(team_nl_mcgrps),
2821 };
2822
2823 static int team_nl_send_multicast(struct sk_buff *skb,
2824                                   struct team *team, u32 portid)
2825 {
2826         return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2827                                        skb, 0, 0, GFP_KERNEL);
2828 }
2829
2830 static int team_nl_send_event_options_get(struct team *team,
2831                                           struct list_head *sel_opt_inst_list)
2832 {
2833         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2834                                         sel_opt_inst_list);
2835 }
2836
2837 static int team_nl_send_event_port_get(struct team *team,
2838                                        struct team_port *port)
2839 {
2840         return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2841                                           port);
2842 }
2843
2844 static int __init team_nl_init(void)
2845 {
2846         return genl_register_family(&team_nl_family);
2847 }
2848
2849 static void team_nl_fini(void)
2850 {
2851         genl_unregister_family(&team_nl_family);
2852 }
2853
2854
2855 /******************
2856  * Change checkers
2857  ******************/
2858
2859 static void __team_options_change_check(struct team *team)
2860 {
2861         int err;
2862         struct team_option_inst *opt_inst;
2863         LIST_HEAD(sel_opt_inst_list);
2864
2865         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2866                 if (opt_inst->changed)
2867                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2868         }
2869         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2870         if (err && err != -ESRCH)
2871                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2872                             err);
2873 }
2874
2875 /* rtnl lock is held */
2876
2877 static void __team_port_change_send(struct team_port *port, bool linkup)
2878 {
2879         int err;
2880
2881         port->changed = true;
2882         port->state.linkup = linkup;
2883         team_refresh_port_linkup(port);
2884         if (linkup) {
2885                 struct ethtool_link_ksettings ecmd;
2886
2887                 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2888                 if (!err) {
2889                         port->state.speed = ecmd.base.speed;
2890                         port->state.duplex = ecmd.base.duplex;
2891                         goto send_event;
2892                 }
2893         }
2894         port->state.speed = 0;
2895         port->state.duplex = 0;
2896
2897 send_event:
2898         err = team_nl_send_event_port_get(port->team, port);
2899         if (err && err != -ESRCH)
2900                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2901                             port->dev->name, err);
2902
2903 }
2904
2905 static void __team_carrier_check(struct team *team)
2906 {
2907         struct team_port *port;
2908         bool team_linkup;
2909
2910         if (team->user_carrier_enabled)
2911                 return;
2912
2913         team_linkup = false;
2914         list_for_each_entry(port, &team->port_list, list) {
2915                 if (port->linkup) {
2916                         team_linkup = true;
2917                         break;
2918                 }
2919         }
2920
2921         if (team_linkup)
2922                 netif_carrier_on(team->dev);
2923         else
2924                 netif_carrier_off(team->dev);
2925 }
2926
2927 static void __team_port_change_check(struct team_port *port, bool linkup)
2928 {
2929         if (port->state.linkup != linkup)
2930                 __team_port_change_send(port, linkup);
2931         __team_carrier_check(port->team);
2932 }
2933
2934 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2935 {
2936         __team_port_change_send(port, linkup);
2937         __team_carrier_check(port->team);
2938 }
2939
2940 static void __team_port_change_port_removed(struct team_port *port)
2941 {
2942         port->removed = true;
2943         __team_port_change_send(port, false);
2944         __team_carrier_check(port->team);
2945 }
2946
2947 static void team_port_change_check(struct team_port *port, bool linkup)
2948 {
2949         struct team *team = port->team;
2950
2951         mutex_lock(&team->lock);
2952         __team_port_change_check(port, linkup);
2953         mutex_unlock(&team->lock);
2954 }
2955
2956
2957 /************************************
2958  * Net device notifier event handler
2959  ************************************/
2960
2961 static int team_device_event(struct notifier_block *unused,
2962                              unsigned long event, void *ptr)
2963 {
2964         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2965         struct team_port *port;
2966
2967         port = team_port_get_rtnl(dev);
2968         if (!port)
2969                 return NOTIFY_DONE;
2970
2971         switch (event) {
2972         case NETDEV_UP:
2973                 if (netif_oper_up(dev))
2974                         team_port_change_check(port, true);
2975                 break;
2976         case NETDEV_DOWN:
2977                 team_port_change_check(port, false);
2978                 break;
2979         case NETDEV_CHANGE:
2980                 if (netif_running(port->dev))
2981                         team_port_change_check(port,
2982                                                !!netif_oper_up(port->dev));
2983                 break;
2984         case NETDEV_UNREGISTER:
2985                 team_del_slave(port->team->dev, dev);
2986                 break;
2987         case NETDEV_FEAT_CHANGE:
2988                 team_compute_features(port->team);
2989                 break;
2990         case NETDEV_PRECHANGEMTU:
2991                 /* Forbid to change mtu of underlaying device */
2992                 if (!port->team->port_mtu_change_allowed)
2993                         return NOTIFY_BAD;
2994                 break;
2995         case NETDEV_PRE_TYPE_CHANGE:
2996                 /* Forbid to change type of underlaying device */
2997                 return NOTIFY_BAD;
2998         case NETDEV_RESEND_IGMP:
2999                 /* Propagate to master device */
3000                 call_netdevice_notifiers(event, port->team->dev);
3001                 break;
3002         }
3003         return NOTIFY_DONE;
3004 }
3005
3006 static struct notifier_block team_notifier_block __read_mostly = {
3007         .notifier_call = team_device_event,
3008 };
3009
3010
3011 /***********************
3012  * Module init and exit
3013  ***********************/
3014
3015 static int __init team_module_init(void)
3016 {
3017         int err;
3018
3019         register_netdevice_notifier(&team_notifier_block);
3020
3021         err = rtnl_link_register(&team_link_ops);
3022         if (err)
3023                 goto err_rtnl_reg;
3024
3025         err = team_nl_init();
3026         if (err)
3027                 goto err_nl_init;
3028
3029         return 0;
3030
3031 err_nl_init:
3032         rtnl_link_unregister(&team_link_ops);
3033
3034 err_rtnl_reg:
3035         unregister_netdevice_notifier(&team_notifier_block);
3036
3037         return err;
3038 }
3039
3040 static void __exit team_module_exit(void)
3041 {
3042         team_nl_fini();
3043         rtnl_link_unregister(&team_link_ops);
3044         unregister_netdevice_notifier(&team_notifier_block);
3045 }
3046
3047 module_init(team_module_init);
3048 module_exit(team_module_exit);
3049
3050 MODULE_LICENSE("GPL v2");
3051 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
3052 MODULE_DESCRIPTION("Ethernet team device driver");
3053 MODULE_ALIAS_RTNL_LINK(DRV_NAME);