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