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_GSO_UDP_L4;
1008         team->dev->hard_header_len = max_hard_header_len;
1009
1010         team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1011         if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1012                 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1013 }
1014
1015 static void team_compute_features(struct team *team)
1016 {
1017         mutex_lock(&team->lock);
1018         __team_compute_features(team);
1019         mutex_unlock(&team->lock);
1020         netdev_change_features(team->dev);
1021 }
1022
1023 static int team_port_enter(struct team *team, struct team_port *port)
1024 {
1025         int err = 0;
1026
1027         dev_hold(team->dev);
1028         if (team->ops.port_enter) {
1029                 err = team->ops.port_enter(team, port);
1030                 if (err) {
1031                         netdev_err(team->dev, "Device %s failed to enter team mode\n",
1032                                    port->dev->name);
1033                         goto err_port_enter;
1034                 }
1035         }
1036
1037         return 0;
1038
1039 err_port_enter:
1040         dev_put(team->dev);
1041
1042         return err;
1043 }
1044
1045 static void team_port_leave(struct team *team, struct team_port *port)
1046 {
1047         if (team->ops.port_leave)
1048                 team->ops.port_leave(team, port);
1049         dev_put(team->dev);
1050 }
1051
1052 #ifdef CONFIG_NET_POLL_CONTROLLER
1053 static int __team_port_enable_netpoll(struct team_port *port)
1054 {
1055         struct netpoll *np;
1056         int err;
1057
1058         np = kzalloc(sizeof(*np), GFP_KERNEL);
1059         if (!np)
1060                 return -ENOMEM;
1061
1062         err = __netpoll_setup(np, port->dev);
1063         if (err) {
1064                 kfree(np);
1065                 return err;
1066         }
1067         port->np = np;
1068         return err;
1069 }
1070
1071 static int team_port_enable_netpoll(struct team_port *port)
1072 {
1073         if (!port->team->dev->npinfo)
1074                 return 0;
1075
1076         return __team_port_enable_netpoll(port);
1077 }
1078
1079 static void team_port_disable_netpoll(struct team_port *port)
1080 {
1081         struct netpoll *np = port->np;
1082
1083         if (!np)
1084                 return;
1085         port->np = NULL;
1086
1087         __netpoll_free(np);
1088 }
1089 #else
1090 static int team_port_enable_netpoll(struct team_port *port)
1091 {
1092         return 0;
1093 }
1094 static void team_port_disable_netpoll(struct team_port *port)
1095 {
1096 }
1097 #endif
1098
1099 static int team_upper_dev_link(struct team *team, struct team_port *port,
1100                                struct netlink_ext_ack *extack)
1101 {
1102         struct netdev_lag_upper_info lag_upper_info;
1103         int err;
1104
1105         lag_upper_info.tx_type = team->mode->lag_tx_type;
1106         lag_upper_info.hash_type = NETDEV_LAG_HASH_UNKNOWN;
1107         err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1108                                            &lag_upper_info, extack);
1109         if (err)
1110                 return err;
1111         port->dev->priv_flags |= IFF_TEAM_PORT;
1112         return 0;
1113 }
1114
1115 static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1116 {
1117         netdev_upper_dev_unlink(port->dev, team->dev);
1118         port->dev->priv_flags &= ~IFF_TEAM_PORT;
1119 }
1120
1121 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1122 static int team_dev_type_check_change(struct net_device *dev,
1123                                       struct net_device *port_dev);
1124
1125 static int team_port_add(struct team *team, struct net_device *port_dev,
1126                          struct netlink_ext_ack *extack)
1127 {
1128         struct net_device *dev = team->dev;
1129         struct team_port *port;
1130         char *portname = port_dev->name;
1131         int err;
1132
1133         if (port_dev->flags & IFF_LOOPBACK) {
1134                 NL_SET_ERR_MSG(extack, "Loopback device can't be added as a team port");
1135                 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1136                            portname);
1137                 return -EINVAL;
1138         }
1139
1140         if (netif_is_team_port(port_dev)) {
1141                 NL_SET_ERR_MSG(extack, "Device is already a port of a team device");
1142                 netdev_err(dev, "Device %s is already a port "
1143                                 "of a team device\n", portname);
1144                 return -EBUSY;
1145         }
1146
1147         if (dev == port_dev) {
1148                 NL_SET_ERR_MSG(extack, "Cannot enslave team device to itself");
1149                 netdev_err(dev, "Cannot enslave team device to itself\n");
1150                 return -EINVAL;
1151         }
1152
1153         if (netdev_has_upper_dev(dev, port_dev)) {
1154                 NL_SET_ERR_MSG(extack, "Device is already an upper device of the team interface");
1155                 netdev_err(dev, "Device %s is already an upper device of the team interface\n",
1156                            portname);
1157                 return -EBUSY;
1158         }
1159
1160         if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1161             vlan_uses_dev(dev)) {
1162                 NL_SET_ERR_MSG(extack, "Device is VLAN challenged and team device has VLAN set up");
1163                 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1164                            portname);
1165                 return -EPERM;
1166         }
1167
1168         err = team_dev_type_check_change(dev, port_dev);
1169         if (err)
1170                 return err;
1171
1172         if (port_dev->flags & IFF_UP) {
1173                 NL_SET_ERR_MSG(extack, "Device is up. Set it down before adding it as a team port");
1174                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1175                            portname);
1176                 return -EBUSY;
1177         }
1178
1179         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1180                        GFP_KERNEL);
1181         if (!port)
1182                 return -ENOMEM;
1183
1184         port->dev = port_dev;
1185         port->team = team;
1186         INIT_LIST_HEAD(&port->qom_list);
1187
1188         port->orig.mtu = port_dev->mtu;
1189         err = dev_set_mtu(port_dev, dev->mtu);
1190         if (err) {
1191                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1192                 goto err_set_mtu;
1193         }
1194
1195         memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1196
1197         err = team_port_enter(team, port);
1198         if (err) {
1199                 netdev_err(dev, "Device %s failed to enter team mode\n",
1200                            portname);
1201                 goto err_port_enter;
1202         }
1203
1204         err = dev_open(port_dev, extack);
1205         if (err) {
1206                 netdev_dbg(dev, "Device %s opening failed\n",
1207                            portname);
1208                 goto err_dev_open;
1209         }
1210
1211         err = vlan_vids_add_by_dev(port_dev, dev);
1212         if (err) {
1213                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1214                                 portname);
1215                 goto err_vids_add;
1216         }
1217
1218         err = team_port_enable_netpoll(port);
1219         if (err) {
1220                 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1221                            portname);
1222                 goto err_enable_netpoll;
1223         }
1224
1225         if (!(dev->features & NETIF_F_LRO))
1226                 dev_disable_lro(port_dev);
1227
1228         err = netdev_rx_handler_register(port_dev, team_handle_frame,
1229                                          port);
1230         if (err) {
1231                 netdev_err(dev, "Device %s failed to register rx_handler\n",
1232                            portname);
1233                 goto err_handler_register;
1234         }
1235
1236         err = team_upper_dev_link(team, port, extack);
1237         if (err) {
1238                 netdev_err(dev, "Device %s failed to set upper link\n",
1239                            portname);
1240                 goto err_set_upper_link;
1241         }
1242
1243         err = __team_option_inst_add_port(team, port);
1244         if (err) {
1245                 netdev_err(dev, "Device %s failed to add per-port options\n",
1246                            portname);
1247                 goto err_option_port_add;
1248         }
1249
1250         /* set promiscuity level to new slave */
1251         if (dev->flags & IFF_PROMISC) {
1252                 err = dev_set_promiscuity(port_dev, 1);
1253                 if (err)
1254                         goto err_set_slave_promisc;
1255         }
1256
1257         /* set allmulti level to new slave */
1258         if (dev->flags & IFF_ALLMULTI) {
1259                 err = dev_set_allmulti(port_dev, 1);
1260                 if (err) {
1261                         if (dev->flags & IFF_PROMISC)
1262                                 dev_set_promiscuity(port_dev, -1);
1263                         goto err_set_slave_promisc;
1264                 }
1265         }
1266
1267         netif_addr_lock_bh(dev);
1268         dev_uc_sync_multiple(port_dev, dev);
1269         dev_mc_sync_multiple(port_dev, dev);
1270         netif_addr_unlock_bh(dev);
1271
1272         port->index = -1;
1273         list_add_tail_rcu(&port->list, &team->port_list);
1274         team_port_enable(team, port);
1275         __team_compute_features(team);
1276         __team_port_change_port_added(port, !!netif_oper_up(port_dev));
1277         __team_options_change_check(team);
1278
1279         netdev_info(dev, "Port device %s added\n", portname);
1280
1281         return 0;
1282
1283 err_set_slave_promisc:
1284         __team_option_inst_del_port(team, port);
1285
1286 err_option_port_add:
1287         team_upper_dev_unlink(team, port);
1288
1289 err_set_upper_link:
1290         netdev_rx_handler_unregister(port_dev);
1291
1292 err_handler_register:
1293         team_port_disable_netpoll(port);
1294
1295 err_enable_netpoll:
1296         vlan_vids_del_by_dev(port_dev, dev);
1297
1298 err_vids_add:
1299         dev_close(port_dev);
1300
1301 err_dev_open:
1302         team_port_leave(team, port);
1303         team_port_set_orig_dev_addr(port);
1304
1305 err_port_enter:
1306         dev_set_mtu(port_dev, port->orig.mtu);
1307
1308 err_set_mtu:
1309         kfree(port);
1310
1311         return err;
1312 }
1313
1314 static void __team_port_change_port_removed(struct team_port *port);
1315
1316 static int team_port_del(struct team *team, struct net_device *port_dev)
1317 {
1318         struct net_device *dev = team->dev;
1319         struct team_port *port;
1320         char *portname = port_dev->name;
1321
1322         port = team_port_get_rtnl(port_dev);
1323         if (!port || !team_port_find(team, port)) {
1324                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1325                            portname);
1326                 return -ENOENT;
1327         }
1328
1329         team_port_disable(team, port);
1330         list_del_rcu(&port->list);
1331
1332         if (dev->flags & IFF_PROMISC)
1333                 dev_set_promiscuity(port_dev, -1);
1334         if (dev->flags & IFF_ALLMULTI)
1335                 dev_set_allmulti(port_dev, -1);
1336
1337         team_upper_dev_unlink(team, port);
1338         netdev_rx_handler_unregister(port_dev);
1339         team_port_disable_netpoll(port);
1340         vlan_vids_del_by_dev(port_dev, dev);
1341         dev_uc_unsync(port_dev, dev);
1342         dev_mc_unsync(port_dev, dev);
1343         dev_close(port_dev);
1344         team_port_leave(team, port);
1345
1346         __team_option_inst_mark_removed_port(team, port);
1347         __team_options_change_check(team);
1348         __team_option_inst_del_port(team, port);
1349         __team_port_change_port_removed(port);
1350
1351         team_port_set_orig_dev_addr(port);
1352         dev_set_mtu(port_dev, port->orig.mtu);
1353         kfree_rcu(port, rcu);
1354         netdev_info(dev, "Port device %s removed\n", portname);
1355         __team_compute_features(team);
1356
1357         return 0;
1358 }
1359
1360
1361 /*****************
1362  * Net device ops
1363  *****************/
1364
1365 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1366 {
1367         ctx->data.str_val = team->mode->kind;
1368         return 0;
1369 }
1370
1371 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1372 {
1373         return team_change_mode(team, ctx->data.str_val);
1374 }
1375
1376 static int team_notify_peers_count_get(struct team *team,
1377                                        struct team_gsetter_ctx *ctx)
1378 {
1379         ctx->data.u32_val = team->notify_peers.count;
1380         return 0;
1381 }
1382
1383 static int team_notify_peers_count_set(struct team *team,
1384                                        struct team_gsetter_ctx *ctx)
1385 {
1386         team->notify_peers.count = ctx->data.u32_val;
1387         return 0;
1388 }
1389
1390 static int team_notify_peers_interval_get(struct team *team,
1391                                           struct team_gsetter_ctx *ctx)
1392 {
1393         ctx->data.u32_val = team->notify_peers.interval;
1394         return 0;
1395 }
1396
1397 static int team_notify_peers_interval_set(struct team *team,
1398                                           struct team_gsetter_ctx *ctx)
1399 {
1400         team->notify_peers.interval = ctx->data.u32_val;
1401         return 0;
1402 }
1403
1404 static int team_mcast_rejoin_count_get(struct team *team,
1405                                        struct team_gsetter_ctx *ctx)
1406 {
1407         ctx->data.u32_val = team->mcast_rejoin.count;
1408         return 0;
1409 }
1410
1411 static int team_mcast_rejoin_count_set(struct team *team,
1412                                        struct team_gsetter_ctx *ctx)
1413 {
1414         team->mcast_rejoin.count = ctx->data.u32_val;
1415         return 0;
1416 }
1417
1418 static int team_mcast_rejoin_interval_get(struct team *team,
1419                                           struct team_gsetter_ctx *ctx)
1420 {
1421         ctx->data.u32_val = team->mcast_rejoin.interval;
1422         return 0;
1423 }
1424
1425 static int team_mcast_rejoin_interval_set(struct team *team,
1426                                           struct team_gsetter_ctx *ctx)
1427 {
1428         team->mcast_rejoin.interval = ctx->data.u32_val;
1429         return 0;
1430 }
1431
1432 static int team_port_en_option_get(struct team *team,
1433                                    struct team_gsetter_ctx *ctx)
1434 {
1435         struct team_port *port = ctx->info->port;
1436
1437         ctx->data.bool_val = team_port_enabled(port);
1438         return 0;
1439 }
1440
1441 static int team_port_en_option_set(struct team *team,
1442                                    struct team_gsetter_ctx *ctx)
1443 {
1444         struct team_port *port = ctx->info->port;
1445
1446         if (ctx->data.bool_val)
1447                 team_port_enable(team, port);
1448         else
1449                 team_port_disable(team, port);
1450         return 0;
1451 }
1452
1453 static int team_user_linkup_option_get(struct team *team,
1454                                        struct team_gsetter_ctx *ctx)
1455 {
1456         struct team_port *port = ctx->info->port;
1457
1458         ctx->data.bool_val = port->user.linkup;
1459         return 0;
1460 }
1461
1462 static void __team_carrier_check(struct team *team);
1463
1464 static int team_user_linkup_option_set(struct team *team,
1465                                        struct team_gsetter_ctx *ctx)
1466 {
1467         struct team_port *port = ctx->info->port;
1468
1469         port->user.linkup = ctx->data.bool_val;
1470         team_refresh_port_linkup(port);
1471         __team_carrier_check(port->team);
1472         return 0;
1473 }
1474
1475 static int team_user_linkup_en_option_get(struct team *team,
1476                                           struct team_gsetter_ctx *ctx)
1477 {
1478         struct team_port *port = ctx->info->port;
1479
1480         ctx->data.bool_val = port->user.linkup_enabled;
1481         return 0;
1482 }
1483
1484 static int team_user_linkup_en_option_set(struct team *team,
1485                                           struct team_gsetter_ctx *ctx)
1486 {
1487         struct team_port *port = ctx->info->port;
1488
1489         port->user.linkup_enabled = ctx->data.bool_val;
1490         team_refresh_port_linkup(port);
1491         __team_carrier_check(port->team);
1492         return 0;
1493 }
1494
1495 static int team_priority_option_get(struct team *team,
1496                                     struct team_gsetter_ctx *ctx)
1497 {
1498         struct team_port *port = ctx->info->port;
1499
1500         ctx->data.s32_val = port->priority;
1501         return 0;
1502 }
1503
1504 static int team_priority_option_set(struct team *team,
1505                                     struct team_gsetter_ctx *ctx)
1506 {
1507         struct team_port *port = ctx->info->port;
1508         s32 priority = ctx->data.s32_val;
1509
1510         if (port->priority == priority)
1511                 return 0;
1512         port->priority = priority;
1513         team_queue_override_port_prio_changed(team, port);
1514         return 0;
1515 }
1516
1517 static int team_queue_id_option_get(struct team *team,
1518                                     struct team_gsetter_ctx *ctx)
1519 {
1520         struct team_port *port = ctx->info->port;
1521
1522         ctx->data.u32_val = port->queue_id;
1523         return 0;
1524 }
1525
1526 static int team_queue_id_option_set(struct team *team,
1527                                     struct team_gsetter_ctx *ctx)
1528 {
1529         struct team_port *port = ctx->info->port;
1530         u16 new_queue_id = ctx->data.u32_val;
1531
1532         if (port->queue_id == new_queue_id)
1533                 return 0;
1534         if (new_queue_id >= team->dev->real_num_tx_queues)
1535                 return -EINVAL;
1536         team_queue_override_port_change_queue_id(team, port, new_queue_id);
1537         return 0;
1538 }
1539
1540 static const struct team_option team_options[] = {
1541         {
1542                 .name = "mode",
1543                 .type = TEAM_OPTION_TYPE_STRING,
1544                 .getter = team_mode_option_get,
1545                 .setter = team_mode_option_set,
1546         },
1547         {
1548                 .name = "notify_peers_count",
1549                 .type = TEAM_OPTION_TYPE_U32,
1550                 .getter = team_notify_peers_count_get,
1551                 .setter = team_notify_peers_count_set,
1552         },
1553         {
1554                 .name = "notify_peers_interval",
1555                 .type = TEAM_OPTION_TYPE_U32,
1556                 .getter = team_notify_peers_interval_get,
1557                 .setter = team_notify_peers_interval_set,
1558         },
1559         {
1560                 .name = "mcast_rejoin_count",
1561                 .type = TEAM_OPTION_TYPE_U32,
1562                 .getter = team_mcast_rejoin_count_get,
1563                 .setter = team_mcast_rejoin_count_set,
1564         },
1565         {
1566                 .name = "mcast_rejoin_interval",
1567                 .type = TEAM_OPTION_TYPE_U32,
1568                 .getter = team_mcast_rejoin_interval_get,
1569                 .setter = team_mcast_rejoin_interval_set,
1570         },
1571         {
1572                 .name = "enabled",
1573                 .type = TEAM_OPTION_TYPE_BOOL,
1574                 .per_port = true,
1575                 .getter = team_port_en_option_get,
1576                 .setter = team_port_en_option_set,
1577         },
1578         {
1579                 .name = "user_linkup",
1580                 .type = TEAM_OPTION_TYPE_BOOL,
1581                 .per_port = true,
1582                 .getter = team_user_linkup_option_get,
1583                 .setter = team_user_linkup_option_set,
1584         },
1585         {
1586                 .name = "user_linkup_enabled",
1587                 .type = TEAM_OPTION_TYPE_BOOL,
1588                 .per_port = true,
1589                 .getter = team_user_linkup_en_option_get,
1590                 .setter = team_user_linkup_en_option_set,
1591         },
1592         {
1593                 .name = "priority",
1594                 .type = TEAM_OPTION_TYPE_S32,
1595                 .per_port = true,
1596                 .getter = team_priority_option_get,
1597                 .setter = team_priority_option_set,
1598         },
1599         {
1600                 .name = "queue_id",
1601                 .type = TEAM_OPTION_TYPE_U32,
1602                 .per_port = true,
1603                 .getter = team_queue_id_option_get,
1604                 .setter = team_queue_id_option_set,
1605         },
1606 };
1607
1608
1609 static int team_init(struct net_device *dev)
1610 {
1611         struct team *team = netdev_priv(dev);
1612         int i;
1613         int err;
1614
1615         team->dev = dev;
1616         mutex_init(&team->lock);
1617         team_set_no_mode(team);
1618
1619         team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1620         if (!team->pcpu_stats)
1621                 return -ENOMEM;
1622
1623         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1624                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1625         INIT_LIST_HEAD(&team->port_list);
1626         err = team_queue_override_init(team);
1627         if (err)
1628                 goto err_team_queue_override_init;
1629
1630         team_adjust_ops(team);
1631
1632         INIT_LIST_HEAD(&team->option_list);
1633         INIT_LIST_HEAD(&team->option_inst_list);
1634
1635         team_notify_peers_init(team);
1636         team_mcast_rejoin_init(team);
1637
1638         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1639         if (err)
1640                 goto err_options_register;
1641         netif_carrier_off(dev);
1642
1643         netdev_lockdep_set_classes(dev);
1644
1645         return 0;
1646
1647 err_options_register:
1648         team_mcast_rejoin_fini(team);
1649         team_notify_peers_fini(team);
1650         team_queue_override_fini(team);
1651 err_team_queue_override_init:
1652         free_percpu(team->pcpu_stats);
1653
1654         return err;
1655 }
1656
1657 static void team_uninit(struct net_device *dev)
1658 {
1659         struct team *team = netdev_priv(dev);
1660         struct team_port *port;
1661         struct team_port *tmp;
1662
1663         mutex_lock(&team->lock);
1664         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1665                 team_port_del(team, port->dev);
1666
1667         __team_change_mode(team, NULL); /* cleanup */
1668         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1669         team_mcast_rejoin_fini(team);
1670         team_notify_peers_fini(team);
1671         team_queue_override_fini(team);
1672         mutex_unlock(&team->lock);
1673         netdev_change_features(dev);
1674 }
1675
1676 static void team_destructor(struct net_device *dev)
1677 {
1678         struct team *team = netdev_priv(dev);
1679
1680         free_percpu(team->pcpu_stats);
1681 }
1682
1683 static int team_open(struct net_device *dev)
1684 {
1685         return 0;
1686 }
1687
1688 static int team_close(struct net_device *dev)
1689 {
1690         return 0;
1691 }
1692
1693 /*
1694  * note: already called with rcu_read_lock
1695  */
1696 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1697 {
1698         struct team *team = netdev_priv(dev);
1699         bool tx_success;
1700         unsigned int len = skb->len;
1701
1702         tx_success = team_queue_override_transmit(team, skb);
1703         if (!tx_success)
1704                 tx_success = team->ops.transmit(team, skb);
1705         if (tx_success) {
1706                 struct team_pcpu_stats *pcpu_stats;
1707
1708                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1709                 u64_stats_update_begin(&pcpu_stats->syncp);
1710                 pcpu_stats->tx_packets++;
1711                 pcpu_stats->tx_bytes += len;
1712                 u64_stats_update_end(&pcpu_stats->syncp);
1713         } else {
1714                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1715         }
1716
1717         return NETDEV_TX_OK;
1718 }
1719
1720 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1721                              struct net_device *sb_dev)
1722 {
1723         /*
1724          * This helper function exists to help dev_pick_tx get the correct
1725          * destination queue.  Using a helper function skips a call to
1726          * skb_tx_hash and will put the skbs in the queue we expect on their
1727          * way down to the team driver.
1728          */
1729         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1730
1731         /*
1732          * Save the original txq to restore before passing to the driver
1733          */
1734         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1735
1736         if (unlikely(txq >= dev->real_num_tx_queues)) {
1737                 do {
1738                         txq -= dev->real_num_tx_queues;
1739                 } while (txq >= dev->real_num_tx_queues);
1740         }
1741         return txq;
1742 }
1743
1744 static void team_change_rx_flags(struct net_device *dev, int change)
1745 {
1746         struct team *team = netdev_priv(dev);
1747         struct team_port *port;
1748         int inc;
1749
1750         rcu_read_lock();
1751         list_for_each_entry_rcu(port, &team->port_list, list) {
1752                 if (change & IFF_PROMISC) {
1753                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1754                         dev_set_promiscuity(port->dev, inc);
1755                 }
1756                 if (change & IFF_ALLMULTI) {
1757                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1758                         dev_set_allmulti(port->dev, inc);
1759                 }
1760         }
1761         rcu_read_unlock();
1762 }
1763
1764 static void team_set_rx_mode(struct net_device *dev)
1765 {
1766         struct team *team = netdev_priv(dev);
1767         struct team_port *port;
1768
1769         rcu_read_lock();
1770         list_for_each_entry_rcu(port, &team->port_list, list) {
1771                 dev_uc_sync_multiple(port->dev, dev);
1772                 dev_mc_sync_multiple(port->dev, dev);
1773         }
1774         rcu_read_unlock();
1775 }
1776
1777 static int team_set_mac_address(struct net_device *dev, void *p)
1778 {
1779         struct sockaddr *addr = p;
1780         struct team *team = netdev_priv(dev);
1781         struct team_port *port;
1782
1783         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1784                 return -EADDRNOTAVAIL;
1785         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1786         mutex_lock(&team->lock);
1787         list_for_each_entry(port, &team->port_list, list)
1788                 if (team->ops.port_change_dev_addr)
1789                         team->ops.port_change_dev_addr(team, port);
1790         mutex_unlock(&team->lock);
1791         return 0;
1792 }
1793
1794 static int team_change_mtu(struct net_device *dev, int new_mtu)
1795 {
1796         struct team *team = netdev_priv(dev);
1797         struct team_port *port;
1798         int err;
1799
1800         /*
1801          * Alhough this is reader, it's guarded by team lock. It's not possible
1802          * to traverse list in reverse under rcu_read_lock
1803          */
1804         mutex_lock(&team->lock);
1805         team->port_mtu_change_allowed = true;
1806         list_for_each_entry(port, &team->port_list, list) {
1807                 err = dev_set_mtu(port->dev, new_mtu);
1808                 if (err) {
1809                         netdev_err(dev, "Device %s failed to change mtu",
1810                                    port->dev->name);
1811                         goto unwind;
1812                 }
1813         }
1814         team->port_mtu_change_allowed = false;
1815         mutex_unlock(&team->lock);
1816
1817         dev->mtu = new_mtu;
1818
1819         return 0;
1820
1821 unwind:
1822         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1823                 dev_set_mtu(port->dev, dev->mtu);
1824         team->port_mtu_change_allowed = false;
1825         mutex_unlock(&team->lock);
1826
1827         return err;
1828 }
1829
1830 static void
1831 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1832 {
1833         struct team *team = netdev_priv(dev);
1834         struct team_pcpu_stats *p;
1835         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1836         u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1837         unsigned int start;
1838         int i;
1839
1840         for_each_possible_cpu(i) {
1841                 p = per_cpu_ptr(team->pcpu_stats, i);
1842                 do {
1843                         start = u64_stats_fetch_begin_irq(&p->syncp);
1844                         rx_packets      = p->rx_packets;
1845                         rx_bytes        = p->rx_bytes;
1846                         rx_multicast    = p->rx_multicast;
1847                         tx_packets      = p->tx_packets;
1848                         tx_bytes        = p->tx_bytes;
1849                 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1850
1851                 stats->rx_packets       += rx_packets;
1852                 stats->rx_bytes         += rx_bytes;
1853                 stats->multicast        += rx_multicast;
1854                 stats->tx_packets       += tx_packets;
1855                 stats->tx_bytes         += tx_bytes;
1856                 /*
1857                  * rx_dropped, tx_dropped & rx_nohandler are u32,
1858                  * updated without syncp protection.
1859                  */
1860                 rx_dropped      += p->rx_dropped;
1861                 tx_dropped      += p->tx_dropped;
1862                 rx_nohandler    += p->rx_nohandler;
1863         }
1864         stats->rx_dropped       = rx_dropped;
1865         stats->tx_dropped       = tx_dropped;
1866         stats->rx_nohandler     = rx_nohandler;
1867 }
1868
1869 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1870 {
1871         struct team *team = netdev_priv(dev);
1872         struct team_port *port;
1873         int err;
1874
1875         /*
1876          * Alhough this is reader, it's guarded by team lock. It's not possible
1877          * to traverse list in reverse under rcu_read_lock
1878          */
1879         mutex_lock(&team->lock);
1880         list_for_each_entry(port, &team->port_list, list) {
1881                 err = vlan_vid_add(port->dev, proto, vid);
1882                 if (err)
1883                         goto unwind;
1884         }
1885         mutex_unlock(&team->lock);
1886
1887         return 0;
1888
1889 unwind:
1890         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1891                 vlan_vid_del(port->dev, proto, vid);
1892         mutex_unlock(&team->lock);
1893
1894         return err;
1895 }
1896
1897 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1898 {
1899         struct team *team = netdev_priv(dev);
1900         struct team_port *port;
1901
1902         mutex_lock(&team->lock);
1903         list_for_each_entry(port, &team->port_list, list)
1904                 vlan_vid_del(port->dev, proto, vid);
1905         mutex_unlock(&team->lock);
1906
1907         return 0;
1908 }
1909
1910 #ifdef CONFIG_NET_POLL_CONTROLLER
1911 static void team_poll_controller(struct net_device *dev)
1912 {
1913 }
1914
1915 static void __team_netpoll_cleanup(struct team *team)
1916 {
1917         struct team_port *port;
1918
1919         list_for_each_entry(port, &team->port_list, list)
1920                 team_port_disable_netpoll(port);
1921 }
1922
1923 static void team_netpoll_cleanup(struct net_device *dev)
1924 {
1925         struct team *team = netdev_priv(dev);
1926
1927         mutex_lock(&team->lock);
1928         __team_netpoll_cleanup(team);
1929         mutex_unlock(&team->lock);
1930 }
1931
1932 static int team_netpoll_setup(struct net_device *dev,
1933                               struct netpoll_info *npifo)
1934 {
1935         struct team *team = netdev_priv(dev);
1936         struct team_port *port;
1937         int err = 0;
1938
1939         mutex_lock(&team->lock);
1940         list_for_each_entry(port, &team->port_list, list) {
1941                 err = __team_port_enable_netpoll(port);
1942                 if (err) {
1943                         __team_netpoll_cleanup(team);
1944                         break;
1945                 }
1946         }
1947         mutex_unlock(&team->lock);
1948         return err;
1949 }
1950 #endif
1951
1952 static int team_add_slave(struct net_device *dev, struct net_device *port_dev,
1953                           struct netlink_ext_ack *extack)
1954 {
1955         struct team *team = netdev_priv(dev);
1956         int err;
1957
1958         mutex_lock(&team->lock);
1959         err = team_port_add(team, port_dev, extack);
1960         mutex_unlock(&team->lock);
1961
1962         if (!err)
1963                 netdev_change_features(dev);
1964
1965         return err;
1966 }
1967
1968 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1969 {
1970         struct team *team = netdev_priv(dev);
1971         int err;
1972
1973         mutex_lock(&team->lock);
1974         err = team_port_del(team, port_dev);
1975         mutex_unlock(&team->lock);
1976
1977         if (!err)
1978                 netdev_change_features(dev);
1979
1980         return err;
1981 }
1982
1983 static netdev_features_t team_fix_features(struct net_device *dev,
1984                                            netdev_features_t features)
1985 {
1986         struct team_port *port;
1987         struct team *team = netdev_priv(dev);
1988         netdev_features_t mask;
1989
1990         mask = features;
1991         features &= ~NETIF_F_ONE_FOR_ALL;
1992         features |= NETIF_F_ALL_FOR_ALL;
1993
1994         rcu_read_lock();
1995         list_for_each_entry_rcu(port, &team->port_list, list) {
1996                 features = netdev_increment_features(features,
1997                                                      port->dev->features,
1998                                                      mask);
1999         }
2000         rcu_read_unlock();
2001
2002         features = netdev_add_tso_features(features, mask);
2003
2004         return features;
2005 }
2006
2007 static int team_change_carrier(struct net_device *dev, bool new_carrier)
2008 {
2009         struct team *team = netdev_priv(dev);
2010
2011         team->user_carrier_enabled = true;
2012
2013         if (new_carrier)
2014                 netif_carrier_on(dev);
2015         else
2016                 netif_carrier_off(dev);
2017         return 0;
2018 }
2019
2020 static const struct net_device_ops team_netdev_ops = {
2021         .ndo_init               = team_init,
2022         .ndo_uninit             = team_uninit,
2023         .ndo_open               = team_open,
2024         .ndo_stop               = team_close,
2025         .ndo_start_xmit         = team_xmit,
2026         .ndo_select_queue       = team_select_queue,
2027         .ndo_change_rx_flags    = team_change_rx_flags,
2028         .ndo_set_rx_mode        = team_set_rx_mode,
2029         .ndo_set_mac_address    = team_set_mac_address,
2030         .ndo_change_mtu         = team_change_mtu,
2031         .ndo_get_stats64        = team_get_stats64,
2032         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
2033         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
2034 #ifdef CONFIG_NET_POLL_CONTROLLER
2035         .ndo_poll_controller    = team_poll_controller,
2036         .ndo_netpoll_setup      = team_netpoll_setup,
2037         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
2038 #endif
2039         .ndo_add_slave          = team_add_slave,
2040         .ndo_del_slave          = team_del_slave,
2041         .ndo_fix_features       = team_fix_features,
2042         .ndo_change_carrier     = team_change_carrier,
2043         .ndo_features_check     = passthru_features_check,
2044 };
2045
2046 /***********************
2047  * ethtool interface
2048  ***********************/
2049
2050 static void team_ethtool_get_drvinfo(struct net_device *dev,
2051                                      struct ethtool_drvinfo *drvinfo)
2052 {
2053         strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2054         strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2055 }
2056
2057 static const struct ethtool_ops team_ethtool_ops = {
2058         .get_drvinfo            = team_ethtool_get_drvinfo,
2059         .get_link               = ethtool_op_get_link,
2060 };
2061
2062 /***********************
2063  * rt netlink interface
2064  ***********************/
2065
2066 static void team_setup_by_port(struct net_device *dev,
2067                                struct net_device *port_dev)
2068 {
2069         dev->header_ops = port_dev->header_ops;
2070         dev->type = port_dev->type;
2071         dev->hard_header_len = port_dev->hard_header_len;
2072         dev->addr_len = port_dev->addr_len;
2073         dev->mtu = port_dev->mtu;
2074         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2075         eth_hw_addr_inherit(dev, port_dev);
2076 }
2077
2078 static int team_dev_type_check_change(struct net_device *dev,
2079                                       struct net_device *port_dev)
2080 {
2081         struct team *team = netdev_priv(dev);
2082         char *portname = port_dev->name;
2083         int err;
2084
2085         if (dev->type == port_dev->type)
2086                 return 0;
2087         if (!list_empty(&team->port_list)) {
2088                 netdev_err(dev, "Device %s is of different type\n", portname);
2089                 return -EBUSY;
2090         }
2091         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2092         err = notifier_to_errno(err);
2093         if (err) {
2094                 netdev_err(dev, "Refused to change device type\n");
2095                 return err;
2096         }
2097         dev_uc_flush(dev);
2098         dev_mc_flush(dev);
2099         team_setup_by_port(dev, port_dev);
2100         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2101         return 0;
2102 }
2103
2104 static void team_setup(struct net_device *dev)
2105 {
2106         ether_setup(dev);
2107         dev->max_mtu = ETH_MAX_MTU;
2108
2109         dev->netdev_ops = &team_netdev_ops;
2110         dev->ethtool_ops = &team_ethtool_ops;
2111         dev->needs_free_netdev = true;
2112         dev->priv_destructor = team_destructor;
2113         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2114         dev->priv_flags |= IFF_NO_QUEUE;
2115         dev->priv_flags |= IFF_TEAM;
2116
2117         /*
2118          * Indicate we support unicast address filtering. That way core won't
2119          * bring us to promisc mode in case a unicast addr is added.
2120          * Let this up to underlay drivers.
2121          */
2122         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2123
2124         dev->features |= NETIF_F_LLTX;
2125         dev->features |= NETIF_F_GRO;
2126
2127         /* Don't allow team devices to change network namespaces. */
2128         dev->features |= NETIF_F_NETNS_LOCAL;
2129
2130         dev->hw_features = TEAM_VLAN_FEATURES |
2131                            NETIF_F_HW_VLAN_CTAG_RX |
2132                            NETIF_F_HW_VLAN_CTAG_FILTER;
2133
2134         dev->hw_features |= NETIF_F_GSO_ENCAP_ALL | NETIF_F_GSO_UDP_L4;
2135         dev->features |= dev->hw_features;
2136         dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
2137 }
2138
2139 static int team_newlink(struct net *src_net, struct net_device *dev,
2140                         struct nlattr *tb[], struct nlattr *data[],
2141                         struct netlink_ext_ack *extack)
2142 {
2143         if (tb[IFLA_ADDRESS] == NULL)
2144                 eth_hw_addr_random(dev);
2145
2146         return register_netdevice(dev);
2147 }
2148
2149 static int team_validate(struct nlattr *tb[], struct nlattr *data[],
2150                          struct netlink_ext_ack *extack)
2151 {
2152         if (tb[IFLA_ADDRESS]) {
2153                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2154                         return -EINVAL;
2155                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2156                         return -EADDRNOTAVAIL;
2157         }
2158         return 0;
2159 }
2160
2161 static unsigned int team_get_num_tx_queues(void)
2162 {
2163         return TEAM_DEFAULT_NUM_TX_QUEUES;
2164 }
2165
2166 static unsigned int team_get_num_rx_queues(void)
2167 {
2168         return TEAM_DEFAULT_NUM_RX_QUEUES;
2169 }
2170
2171 static struct rtnl_link_ops team_link_ops __read_mostly = {
2172         .kind                   = DRV_NAME,
2173         .priv_size              = sizeof(struct team),
2174         .setup                  = team_setup,
2175         .newlink                = team_newlink,
2176         .validate               = team_validate,
2177         .get_num_tx_queues      = team_get_num_tx_queues,
2178         .get_num_rx_queues      = team_get_num_rx_queues,
2179 };
2180
2181
2182 /***********************************
2183  * Generic netlink custom interface
2184  ***********************************/
2185
2186 static struct genl_family team_nl_family;
2187
2188 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2189         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
2190         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
2191         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
2192         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
2193 };
2194
2195 static const struct nla_policy
2196 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2197         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
2198         [TEAM_ATTR_OPTION_NAME] = {
2199                 .type = NLA_STRING,
2200                 .len = TEAM_STRING_MAX_LEN,
2201         },
2202         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
2203         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
2204         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
2205 };
2206
2207 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2208 {
2209         struct sk_buff *msg;
2210         void *hdr;
2211         int err;
2212
2213         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2214         if (!msg)
2215                 return -ENOMEM;
2216
2217         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2218                           &team_nl_family, 0, TEAM_CMD_NOOP);
2219         if (!hdr) {
2220                 err = -EMSGSIZE;
2221                 goto err_msg_put;
2222         }
2223
2224         genlmsg_end(msg, hdr);
2225
2226         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2227
2228 err_msg_put:
2229         nlmsg_free(msg);
2230
2231         return err;
2232 }
2233
2234 /*
2235  * Netlink cmd functions should be locked by following two functions.
2236  * Since dev gets held here, that ensures dev won't disappear in between.
2237  */
2238 static struct team *team_nl_team_get(struct genl_info *info)
2239 {
2240         struct net *net = genl_info_net(info);
2241         int ifindex;
2242         struct net_device *dev;
2243         struct team *team;
2244
2245         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2246                 return NULL;
2247
2248         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2249         dev = dev_get_by_index(net, ifindex);
2250         if (!dev || dev->netdev_ops != &team_netdev_ops) {
2251                 if (dev)
2252                         dev_put(dev);
2253                 return NULL;
2254         }
2255
2256         team = netdev_priv(dev);
2257         mutex_lock(&team->lock);
2258         return team;
2259 }
2260
2261 static void team_nl_team_put(struct team *team)
2262 {
2263         mutex_unlock(&team->lock);
2264         dev_put(team->dev);
2265 }
2266
2267 typedef int team_nl_send_func_t(struct sk_buff *skb,
2268                                 struct team *team, u32 portid);
2269
2270 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2271 {
2272         return genlmsg_unicast(dev_net(team->dev), skb, portid);
2273 }
2274
2275 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2276                                        struct team_option_inst *opt_inst)
2277 {
2278         struct nlattr *option_item;
2279         struct team_option *option = opt_inst->option;
2280         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2281         struct team_gsetter_ctx ctx;
2282         int err;
2283
2284         ctx.info = opt_inst_info;
2285         err = team_option_get(team, opt_inst, &ctx);
2286         if (err)
2287                 return err;
2288
2289         option_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_OPTION);
2290         if (!option_item)
2291                 return -EMSGSIZE;
2292
2293         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2294                 goto nest_cancel;
2295         if (opt_inst_info->port &&
2296             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2297                         opt_inst_info->port->dev->ifindex))
2298                 goto nest_cancel;
2299         if (opt_inst->option->array_size &&
2300             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2301                         opt_inst_info->array_index))
2302                 goto nest_cancel;
2303
2304         switch (option->type) {
2305         case TEAM_OPTION_TYPE_U32:
2306                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2307                         goto nest_cancel;
2308                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2309                         goto nest_cancel;
2310                 break;
2311         case TEAM_OPTION_TYPE_STRING:
2312                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2313                         goto nest_cancel;
2314                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2315                                    ctx.data.str_val))
2316                         goto nest_cancel;
2317                 break;
2318         case TEAM_OPTION_TYPE_BINARY:
2319                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2320                         goto nest_cancel;
2321                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2322                             ctx.data.bin_val.ptr))
2323                         goto nest_cancel;
2324                 break;
2325         case TEAM_OPTION_TYPE_BOOL:
2326                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2327                         goto nest_cancel;
2328                 if (ctx.data.bool_val &&
2329                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2330                         goto nest_cancel;
2331                 break;
2332         case TEAM_OPTION_TYPE_S32:
2333                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2334                         goto nest_cancel;
2335                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2336                         goto nest_cancel;
2337                 break;
2338         default:
2339                 BUG();
2340         }
2341         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2342                 goto nest_cancel;
2343         if (opt_inst->changed) {
2344                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2345                         goto nest_cancel;
2346                 opt_inst->changed = false;
2347         }
2348         nla_nest_end(skb, option_item);
2349         return 0;
2350
2351 nest_cancel:
2352         nla_nest_cancel(skb, option_item);
2353         return -EMSGSIZE;
2354 }
2355
2356 static int __send_and_alloc_skb(struct sk_buff **pskb,
2357                                 struct team *team, u32 portid,
2358                                 team_nl_send_func_t *send_func)
2359 {
2360         int err;
2361
2362         if (*pskb) {
2363                 err = send_func(*pskb, team, portid);
2364                 if (err)
2365                         return err;
2366         }
2367         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2368         if (!*pskb)
2369                 return -ENOMEM;
2370         return 0;
2371 }
2372
2373 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2374                                     int flags, team_nl_send_func_t *send_func,
2375                                     struct list_head *sel_opt_inst_list)
2376 {
2377         struct nlattr *option_list;
2378         struct nlmsghdr *nlh;
2379         void *hdr;
2380         struct team_option_inst *opt_inst;
2381         int err;
2382         struct sk_buff *skb = NULL;
2383         bool incomplete;
2384         int i;
2385
2386         opt_inst = list_first_entry(sel_opt_inst_list,
2387                                     struct team_option_inst, tmp_list);
2388
2389 start_again:
2390         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2391         if (err)
2392                 return err;
2393
2394         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2395                           TEAM_CMD_OPTIONS_GET);
2396         if (!hdr) {
2397                 nlmsg_free(skb);
2398                 return -EMSGSIZE;
2399         }
2400
2401         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2402                 goto nla_put_failure;
2403         option_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_OPTION);
2404         if (!option_list)
2405                 goto nla_put_failure;
2406
2407         i = 0;
2408         incomplete = false;
2409         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2410                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2411                 if (err) {
2412                         if (err == -EMSGSIZE) {
2413                                 if (!i)
2414                                         goto errout;
2415                                 incomplete = true;
2416                                 break;
2417                         }
2418                         goto errout;
2419                 }
2420                 i++;
2421         }
2422
2423         nla_nest_end(skb, option_list);
2424         genlmsg_end(skb, hdr);
2425         if (incomplete)
2426                 goto start_again;
2427
2428 send_done:
2429         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2430         if (!nlh) {
2431                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2432                 if (err)
2433                         return err;
2434                 goto send_done;
2435         }
2436
2437         return send_func(skb, team, portid);
2438
2439 nla_put_failure:
2440         err = -EMSGSIZE;
2441 errout:
2442         nlmsg_free(skb);
2443         return err;
2444 }
2445
2446 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2447 {
2448         struct team *team;
2449         struct team_option_inst *opt_inst;
2450         int err;
2451         LIST_HEAD(sel_opt_inst_list);
2452
2453         team = team_nl_team_get(info);
2454         if (!team)
2455                 return -EINVAL;
2456
2457         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2458                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2459         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2460                                        NLM_F_ACK, team_nl_send_unicast,
2461                                        &sel_opt_inst_list);
2462
2463         team_nl_team_put(team);
2464
2465         return err;
2466 }
2467
2468 static int team_nl_send_event_options_get(struct team *team,
2469                                           struct list_head *sel_opt_inst_list);
2470
2471 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2472 {
2473         struct team *team;
2474         int err = 0;
2475         int i;
2476         struct nlattr *nl_option;
2477
2478         rtnl_lock();
2479
2480         team = team_nl_team_get(info);
2481         if (!team) {
2482                 err = -EINVAL;
2483                 goto rtnl_unlock;
2484         }
2485
2486         err = -EINVAL;
2487         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2488                 err = -EINVAL;
2489                 goto team_put;
2490         }
2491
2492         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2493                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2494                 struct nlattr *attr;
2495                 struct nlattr *attr_data;
2496                 LIST_HEAD(opt_inst_list);
2497                 enum team_option_type opt_type;
2498                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2499                 u32 opt_array_index = 0;
2500                 bool opt_is_array = false;
2501                 struct team_option_inst *opt_inst;
2502                 char *opt_name;
2503                 bool opt_found = false;
2504
2505                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2506                         err = -EINVAL;
2507                         goto team_put;
2508                 }
2509                 err = nla_parse_nested_deprecated(opt_attrs,
2510                                                   TEAM_ATTR_OPTION_MAX,
2511                                                   nl_option,
2512                                                   team_nl_option_policy,
2513                                                   info->extack);
2514                 if (err)
2515                         goto team_put;
2516                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2517                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2518                         err = -EINVAL;
2519                         goto team_put;
2520                 }
2521                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2522                 case NLA_U32:
2523                         opt_type = TEAM_OPTION_TYPE_U32;
2524                         break;
2525                 case NLA_STRING:
2526                         opt_type = TEAM_OPTION_TYPE_STRING;
2527                         break;
2528                 case NLA_BINARY:
2529                         opt_type = TEAM_OPTION_TYPE_BINARY;
2530                         break;
2531                 case NLA_FLAG:
2532                         opt_type = TEAM_OPTION_TYPE_BOOL;
2533                         break;
2534                 case NLA_S32:
2535                         opt_type = TEAM_OPTION_TYPE_S32;
2536                         break;
2537                 default:
2538                         goto team_put;
2539                 }
2540
2541                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2542                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2543                         err = -EINVAL;
2544                         goto team_put;
2545                 }
2546
2547                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2548                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2549                 if (attr)
2550                         opt_port_ifindex = nla_get_u32(attr);
2551
2552                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2553                 if (attr) {
2554                         opt_is_array = true;
2555                         opt_array_index = nla_get_u32(attr);
2556                 }
2557
2558                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2559                         struct team_option *option = opt_inst->option;
2560                         struct team_gsetter_ctx ctx;
2561                         struct team_option_inst_info *opt_inst_info;
2562                         int tmp_ifindex;
2563
2564                         opt_inst_info = &opt_inst->info;
2565                         tmp_ifindex = opt_inst_info->port ?
2566                                       opt_inst_info->port->dev->ifindex : 0;
2567                         if (option->type != opt_type ||
2568                             strcmp(option->name, opt_name) ||
2569                             tmp_ifindex != opt_port_ifindex ||
2570                             (option->array_size && !opt_is_array) ||
2571                             opt_inst_info->array_index != opt_array_index)
2572                                 continue;
2573                         opt_found = true;
2574                         ctx.info = opt_inst_info;
2575                         switch (opt_type) {
2576                         case TEAM_OPTION_TYPE_U32:
2577                                 ctx.data.u32_val = nla_get_u32(attr_data);
2578                                 break;
2579                         case TEAM_OPTION_TYPE_STRING:
2580                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2581                                         err = -EINVAL;
2582                                         goto team_put;
2583                                 }
2584                                 ctx.data.str_val = nla_data(attr_data);
2585                                 break;
2586                         case TEAM_OPTION_TYPE_BINARY:
2587                                 ctx.data.bin_val.len = nla_len(attr_data);
2588                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2589                                 break;
2590                         case TEAM_OPTION_TYPE_BOOL:
2591                                 ctx.data.bool_val = attr_data ? true : false;
2592                                 break;
2593                         case TEAM_OPTION_TYPE_S32:
2594                                 ctx.data.s32_val = nla_get_s32(attr_data);
2595                                 break;
2596                         default:
2597                                 BUG();
2598                         }
2599                         err = team_option_set(team, opt_inst, &ctx);
2600                         if (err)
2601                                 goto team_put;
2602                         opt_inst->changed = true;
2603                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2604                 }
2605                 if (!opt_found) {
2606                         err = -ENOENT;
2607                         goto team_put;
2608                 }
2609
2610                 err = team_nl_send_event_options_get(team, &opt_inst_list);
2611                 if (err)
2612                         break;
2613         }
2614
2615 team_put:
2616         team_nl_team_put(team);
2617 rtnl_unlock:
2618         rtnl_unlock();
2619         return err;
2620 }
2621
2622 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2623                                      struct team_port *port)
2624 {
2625         struct nlattr *port_item;
2626
2627         port_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_PORT);
2628         if (!port_item)
2629                 goto nest_cancel;
2630         if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2631                 goto nest_cancel;
2632         if (port->changed) {
2633                 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2634                         goto nest_cancel;
2635                 port->changed = false;
2636         }
2637         if ((port->removed &&
2638              nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2639             (port->state.linkup &&
2640              nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2641             nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2642             nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2643                 goto nest_cancel;
2644         nla_nest_end(skb, port_item);
2645         return 0;
2646
2647 nest_cancel:
2648         nla_nest_cancel(skb, port_item);
2649         return -EMSGSIZE;
2650 }
2651
2652 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2653                                       int flags, team_nl_send_func_t *send_func,
2654                                       struct team_port *one_port)
2655 {
2656         struct nlattr *port_list;
2657         struct nlmsghdr *nlh;
2658         void *hdr;
2659         struct team_port *port;
2660         int err;
2661         struct sk_buff *skb = NULL;
2662         bool incomplete;
2663         int i;
2664
2665         port = list_first_entry_or_null(&team->port_list,
2666                                         struct team_port, list);
2667
2668 start_again:
2669         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2670         if (err)
2671                 return err;
2672
2673         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2674                           TEAM_CMD_PORT_LIST_GET);
2675         if (!hdr) {
2676                 nlmsg_free(skb);
2677                 return -EMSGSIZE;
2678         }
2679
2680         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2681                 goto nla_put_failure;
2682         port_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_PORT);
2683         if (!port_list)
2684                 goto nla_put_failure;
2685
2686         i = 0;
2687         incomplete = false;
2688
2689         /* If one port is selected, called wants to send port list containing
2690          * only this port. Otherwise go through all listed ports and send all
2691          */
2692         if (one_port) {
2693                 err = team_nl_fill_one_port_get(skb, one_port);
2694                 if (err)
2695                         goto errout;
2696         } else if (port) {
2697                 list_for_each_entry_from(port, &team->port_list, list) {
2698                         err = team_nl_fill_one_port_get(skb, port);
2699                         if (err) {
2700                                 if (err == -EMSGSIZE) {
2701                                         if (!i)
2702                                                 goto errout;
2703                                         incomplete = true;
2704                                         break;
2705                                 }
2706                                 goto errout;
2707                         }
2708                         i++;
2709                 }
2710         }
2711
2712         nla_nest_end(skb, port_list);
2713         genlmsg_end(skb, hdr);
2714         if (incomplete)
2715                 goto start_again;
2716
2717 send_done:
2718         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2719         if (!nlh) {
2720                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2721                 if (err)
2722                         return err;
2723                 goto send_done;
2724         }
2725
2726         return send_func(skb, team, portid);
2727
2728 nla_put_failure:
2729         err = -EMSGSIZE;
2730 errout:
2731         nlmsg_free(skb);
2732         return err;
2733 }
2734
2735 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2736                                      struct genl_info *info)
2737 {
2738         struct team *team;
2739         int err;
2740
2741         team = team_nl_team_get(info);
2742         if (!team)
2743                 return -EINVAL;
2744
2745         err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2746                                          NLM_F_ACK, team_nl_send_unicast, NULL);
2747
2748         team_nl_team_put(team);
2749
2750         return err;
2751 }
2752
2753 static const struct genl_ops team_nl_ops[] = {
2754         {
2755                 .cmd = TEAM_CMD_NOOP,
2756                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2757                 .doit = team_nl_cmd_noop,
2758         },
2759         {
2760                 .cmd = TEAM_CMD_OPTIONS_SET,
2761                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2762                 .doit = team_nl_cmd_options_set,
2763                 .flags = GENL_ADMIN_PERM,
2764         },
2765         {
2766                 .cmd = TEAM_CMD_OPTIONS_GET,
2767                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2768                 .doit = team_nl_cmd_options_get,
2769                 .flags = GENL_ADMIN_PERM,
2770         },
2771         {
2772                 .cmd = TEAM_CMD_PORT_LIST_GET,
2773                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2774                 .doit = team_nl_cmd_port_list_get,
2775                 .flags = GENL_ADMIN_PERM,
2776         },
2777 };
2778
2779 static const struct genl_multicast_group team_nl_mcgrps[] = {
2780         { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2781 };
2782
2783 static struct genl_family team_nl_family __ro_after_init = {
2784         .name           = TEAM_GENL_NAME,
2785         .version        = TEAM_GENL_VERSION,
2786         .maxattr        = TEAM_ATTR_MAX,
2787         .policy = team_nl_policy,
2788         .netnsok        = true,
2789         .module         = THIS_MODULE,
2790         .ops            = team_nl_ops,
2791         .n_ops          = ARRAY_SIZE(team_nl_ops),
2792         .mcgrps         = team_nl_mcgrps,
2793         .n_mcgrps       = ARRAY_SIZE(team_nl_mcgrps),
2794 };
2795
2796 static int team_nl_send_multicast(struct sk_buff *skb,
2797                                   struct team *team, u32 portid)
2798 {
2799         return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2800                                        skb, 0, 0, GFP_KERNEL);
2801 }
2802
2803 static int team_nl_send_event_options_get(struct team *team,
2804                                           struct list_head *sel_opt_inst_list)
2805 {
2806         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2807                                         sel_opt_inst_list);
2808 }
2809
2810 static int team_nl_send_event_port_get(struct team *team,
2811                                        struct team_port *port)
2812 {
2813         return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2814                                           port);
2815 }
2816
2817 static int __init team_nl_init(void)
2818 {
2819         return genl_register_family(&team_nl_family);
2820 }
2821
2822 static void team_nl_fini(void)
2823 {
2824         genl_unregister_family(&team_nl_family);
2825 }
2826
2827
2828 /******************
2829  * Change checkers
2830  ******************/
2831
2832 static void __team_options_change_check(struct team *team)
2833 {
2834         int err;
2835         struct team_option_inst *opt_inst;
2836         LIST_HEAD(sel_opt_inst_list);
2837
2838         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2839                 if (opt_inst->changed)
2840                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2841         }
2842         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2843         if (err && err != -ESRCH)
2844                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2845                             err);
2846 }
2847
2848 /* rtnl lock is held */
2849
2850 static void __team_port_change_send(struct team_port *port, bool linkup)
2851 {
2852         int err;
2853
2854         port->changed = true;
2855         port->state.linkup = linkup;
2856         team_refresh_port_linkup(port);
2857         if (linkup) {
2858                 struct ethtool_link_ksettings ecmd;
2859
2860                 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2861                 if (!err) {
2862                         port->state.speed = ecmd.base.speed;
2863                         port->state.duplex = ecmd.base.duplex;
2864                         goto send_event;
2865                 }
2866         }
2867         port->state.speed = 0;
2868         port->state.duplex = 0;
2869
2870 send_event:
2871         err = team_nl_send_event_port_get(port->team, port);
2872         if (err && err != -ESRCH)
2873                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2874                             port->dev->name, err);
2875
2876 }
2877
2878 static void __team_carrier_check(struct team *team)
2879 {
2880         struct team_port *port;
2881         bool team_linkup;
2882
2883         if (team->user_carrier_enabled)
2884                 return;
2885
2886         team_linkup = false;
2887         list_for_each_entry(port, &team->port_list, list) {
2888                 if (port->linkup) {
2889                         team_linkup = true;
2890                         break;
2891                 }
2892         }
2893
2894         if (team_linkup)
2895                 netif_carrier_on(team->dev);
2896         else
2897                 netif_carrier_off(team->dev);
2898 }
2899
2900 static void __team_port_change_check(struct team_port *port, bool linkup)
2901 {
2902         if (port->state.linkup != linkup)
2903                 __team_port_change_send(port, linkup);
2904         __team_carrier_check(port->team);
2905 }
2906
2907 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2908 {
2909         __team_port_change_send(port, linkup);
2910         __team_carrier_check(port->team);
2911 }
2912
2913 static void __team_port_change_port_removed(struct team_port *port)
2914 {
2915         port->removed = true;
2916         __team_port_change_send(port, false);
2917         __team_carrier_check(port->team);
2918 }
2919
2920 static void team_port_change_check(struct team_port *port, bool linkup)
2921 {
2922         struct team *team = port->team;
2923
2924         mutex_lock(&team->lock);
2925         __team_port_change_check(port, linkup);
2926         mutex_unlock(&team->lock);
2927 }
2928
2929
2930 /************************************
2931  * Net device notifier event handler
2932  ************************************/
2933
2934 static int team_device_event(struct notifier_block *unused,
2935                              unsigned long event, void *ptr)
2936 {
2937         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2938         struct team_port *port;
2939
2940         port = team_port_get_rtnl(dev);
2941         if (!port)
2942                 return NOTIFY_DONE;
2943
2944         switch (event) {
2945         case NETDEV_UP:
2946                 if (netif_oper_up(dev))
2947                         team_port_change_check(port, true);
2948                 break;
2949         case NETDEV_DOWN:
2950                 team_port_change_check(port, false);
2951                 break;
2952         case NETDEV_CHANGE:
2953                 if (netif_running(port->dev))
2954                         team_port_change_check(port,
2955                                                !!netif_oper_up(port->dev));
2956                 break;
2957         case NETDEV_UNREGISTER:
2958                 team_del_slave(port->team->dev, dev);
2959                 break;
2960         case NETDEV_FEAT_CHANGE:
2961                 team_compute_features(port->team);
2962                 break;
2963         case NETDEV_PRECHANGEMTU:
2964                 /* Forbid to change mtu of underlaying device */
2965                 if (!port->team->port_mtu_change_allowed)
2966                         return NOTIFY_BAD;
2967                 break;
2968         case NETDEV_PRE_TYPE_CHANGE:
2969                 /* Forbid to change type of underlaying device */
2970                 return NOTIFY_BAD;
2971         case NETDEV_RESEND_IGMP:
2972                 /* Propagate to master device */
2973                 call_netdevice_notifiers(event, port->team->dev);
2974                 break;
2975         }
2976         return NOTIFY_DONE;
2977 }
2978
2979 static struct notifier_block team_notifier_block __read_mostly = {
2980         .notifier_call = team_device_event,
2981 };
2982
2983
2984 /***********************
2985  * Module init and exit
2986  ***********************/
2987
2988 static int __init team_module_init(void)
2989 {
2990         int err;
2991
2992         register_netdevice_notifier(&team_notifier_block);
2993
2994         err = rtnl_link_register(&team_link_ops);
2995         if (err)
2996                 goto err_rtnl_reg;
2997
2998         err = team_nl_init();
2999         if (err)
3000                 goto err_nl_init;
3001
3002         return 0;
3003
3004 err_nl_init:
3005         rtnl_link_unregister(&team_link_ops);
3006
3007 err_rtnl_reg:
3008         unregister_netdevice_notifier(&team_notifier_block);
3009
3010         return err;
3011 }
3012
3013 static void __exit team_module_exit(void)
3014 {
3015         team_nl_fini();
3016         rtnl_link_unregister(&team_link_ops);
3017         unregister_netdevice_notifier(&team_notifier_block);
3018 }
3019
3020 module_init(team_module_init);
3021 module_exit(team_module_exit);
3022
3023 MODULE_LICENSE("GPL v2");
3024 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
3025 MODULE_DESCRIPTION("Ethernet team device driver");
3026 MODULE_ALIAS_RTNL_LINK(DRV_NAME);