drivers/net/team/team.c

   1 /*
   2  * drivers/net/team/team.c - Network team device driver
   3  * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/types.h>
  13 #include <linux/module.h>
  14 #include <linux/init.h>
  15 #include <linux/slab.h>
  16 #include <linux/rcupdate.h>
  17 #include <linux/errno.h>
  18 #include <linux/ctype.h>
  19 #include <linux/notifier.h>
  20 #include <linux/netdevice.h>
  21 #include <linux/netpoll.h>
  22 #include <linux/if_vlan.h>
  23 #include <linux/if_arp.h>
  24 #include <linux/socket.h>
  25 #include <linux/etherdevice.h>
  26 #include <linux/rtnetlink.h>
  27 #include <net/rtnetlink.h>
  28 #include <net/genetlink.h>
  29 #include <net/netlink.h>
  30 #include <net/sch_generic.h>
  31 #include <generated/utsrelease.h>
  32 #include <linux/if_team.h>
  33
  34 #define DRV_NAME "team"
  35
  36
  37 /**********
  38  * Helpers
  39  **********/
  40
  41 #define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT)
  42
  43 static struct team_port *team_port_get_rtnl(const struct net_device *dev)
  44 {
  45         struct team_port *port = rtnl_dereference(dev->rx_handler_data);
  46
  47         return team_port_exists(dev) ? port : NULL;
  48 }
  49
  50 /*
  51  * Since the ability to change device address for open port device is tested in
  52  * team_port_add, this function can be called without control of return value
  53  */
  54 static int __set_port_dev_addr(struct net_device *port_dev,
  55                                const unsigned char *dev_addr)
  56 {
  57         struct sockaddr_storage addr;
  58
  59         memcpy(addr.__data, dev_addr, port_dev->addr_len);
  60         addr.ss_family = port_dev->type;
  61         return dev_set_mac_address(port_dev, (struct sockaddr *)&addr, NULL);
  62 }
  63
  64 static int team_port_set_orig_dev_addr(struct team_port *port)
  65 {
  66         return __set_port_dev_addr(port->dev, port->orig.dev_addr);
  67 }
  68
  69 static int team_port_set_team_dev_addr(struct team *team,
  70                                        struct team_port *port)
  71 {
  72         return __set_port_dev_addr(port->dev, team->dev->dev_addr);
  73 }
  74
  75 int team_modeop_port_enter(struct team *team, struct team_port *port)
  76 {
  77         return team_port_set_team_dev_addr(team, port);
  78 }
  79 EXPORT_SYMBOL(team_modeop_port_enter);
  80
  81 void team_modeop_port_change_dev_addr(struct team *team,
  82                                       struct team_port *port)
  83 {
  84         team_port_set_team_dev_addr(team, port);
  85 }
  86 EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
  87
  88 static void team_lower_state_changed(struct team_port *port)
  89 {
  90         struct netdev_lag_lower_state_info info;
  91
  92         info.link_up = port->linkup;
  93         info.tx_enabled = team_port_enabled(port);
  94         netdev_lower_state_changed(port->dev, &info);
  95 }
  96
  97 static void team_refresh_port_linkup(struct team_port *port)
  98 {
  99         bool new_linkup = port->user.linkup_enabled ? port->user.linkup :
 100                                                       port->state.linkup;
 101
 102         if (port->linkup != new_linkup) {
 103                 port->linkup = new_linkup;
 104                 team_lower_state_changed(port);
 105         }
 106 }
 107
 108
 109 /*******************
 110  * Options handling
 111  *******************/
 112
 113 struct team_option_inst { /* One for each option instance */
 114         struct list_head list;
 115         struct list_head tmp_list;
 116         struct team_option *option;
 117         struct team_option_inst_info info;
 118         bool changed;
 119         bool removed;
 120 };
 121
 122 static struct team_option *__team_find_option(struct team *team,
 123                                               const char *opt_name)
 124 {
 125         struct team_option *option;
 126
 127         list_for_each_entry(option, &team->option_list, list) {
 128                 if (strcmp(option->name, opt_name) == 0)
 129                         return option;
 130         }
 131         return NULL;
 132 }
 133
 134 static void __team_option_inst_del(struct team_option_inst *opt_inst)
 135 {
 136         list_del(&opt_inst->list);
 137         kfree(opt_inst);
 138 }
 139
 140 static void __team_option_inst_del_option(struct team *team,
 141                                           struct team_option *option)
 142 {
 143         struct team_option_inst *opt_inst, *tmp;
 144
 145         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 146                 if (opt_inst->option == option)
 147                         __team_option_inst_del(opt_inst);
 148         }
 149 }
 150
 151 static int __team_option_inst_add(struct team *team, struct team_option *option,
 152                                   struct team_port *port)
 153 {
 154         struct team_option_inst *opt_inst;
 155         unsigned int array_size;
 156         unsigned int i;
 157         int err;
 158
 159         array_size = option->array_size;
 160         if (!array_size)
 161                 array_size = 1; /* No array but still need one instance */
 162
 163         for (i = 0; i < array_size; i++) {
 164                 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
 165                 if (!opt_inst)
 166                         return -ENOMEM;
 167                 opt_inst->option = option;
 168                 opt_inst->info.port = port;
 169                 opt_inst->info.array_index = i;
 170                 opt_inst->changed = true;
 171                 opt_inst->removed = false;
 172                 list_add_tail(&opt_inst->list, &team->option_inst_list);
 173                 if (option->init) {
 174                         err = option->init(team, &opt_inst->info);
 175                         if (err)
 176                                 return err;
 177                 }
 178
 179         }
 180         return 0;
 181 }
 182
 183 static int __team_option_inst_add_option(struct team *team,
 184                                          struct team_option *option)
 185 {
 186         int err;
 187
 188         if (!option->per_port) {
 189                 err = __team_option_inst_add(team, option, NULL);
 190                 if (err)
 191                         goto inst_del_option;
 192         }
 193         return 0;
 194
 195 inst_del_option:
 196         __team_option_inst_del_option(team, option);
 197         return err;
 198 }
 199
 200 static void __team_option_inst_mark_removed_option(struct team *team,
 201                                                    struct team_option *option)
 202 {
 203         struct team_option_inst *opt_inst;
 204
 205         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 206                 if (opt_inst->option == option) {
 207                         opt_inst->changed = true;
 208                         opt_inst->removed = true;
 209                 }
 210         }
 211 }
 212
 213 static void __team_option_inst_del_port(struct team *team,
 214                                         struct team_port *port)
 215 {
 216         struct team_option_inst *opt_inst, *tmp;
 217
 218         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 219                 if (opt_inst->option->per_port &&
 220                     opt_inst->info.port == port)
 221                         __team_option_inst_del(opt_inst);
 222         }
 223 }
 224
 225 static int __team_option_inst_add_port(struct team *team,
 226                                        struct team_port *port)
 227 {
 228         struct team_option *option;
 229         int err;
 230
 231         list_for_each_entry(option, &team->option_list, list) {
 232                 if (!option->per_port)
 233                         continue;
 234                 err = __team_option_inst_add(team, option, port);
 235                 if (err)
 236                         goto inst_del_port;
 237         }
 238         return 0;
 239
 240 inst_del_port:
 241         __team_option_inst_del_port(team, port);
 242         return err;
 243 }
 244
 245 static void __team_option_inst_mark_removed_port(struct team *team,
 246                                                  struct team_port *port)
 247 {
 248         struct team_option_inst *opt_inst;
 249
 250         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 251                 if (opt_inst->info.port == port) {
 252                         opt_inst->changed = true;
 253                         opt_inst->removed = true;
 254                 }
 255         }
 256 }
 257
 258 static int __team_options_register(struct team *team,
 259                                    const struct team_option *option,
 260                                    size_t option_count)
 261 {
 262         int i;
 263         struct team_option **dst_opts;
 264         int err;
 265
 266         dst_opts = kcalloc(option_count, sizeof(struct team_option *),
 267                            GFP_KERNEL);
 268         if (!dst_opts)
 269                 return -ENOMEM;
 270         for (i = 0; i < option_count; i++, option++) {
 271                 if (__team_find_option(team, option->name)) {
 272                         err = -EEXIST;
 273                         goto alloc_rollback;
 274                 }
 275                 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
 276                 if (!dst_opts[i]) {
 277                         err = -ENOMEM;
 278                         goto alloc_rollback;
 279                 }
 280         }
 281
 282         for (i = 0; i < option_count; i++) {
 283                 err = __team_option_inst_add_option(team, dst_opts[i]);
 284                 if (err)
 285                         goto inst_rollback;
 286                 list_add_tail(&dst_opts[i]->list, &team->option_list);
 287         }
 288
 289         kfree(dst_opts);
 290         return 0;
 291
 292 inst_rollback:
 293         for (i--; i >= 0; i--)
 294                 __team_option_inst_del_option(team, dst_opts[i]);
 295
 296         i = option_count - 1;
 297 alloc_rollback:
 298         for (i--; i >= 0; i--)
 299                 kfree(dst_opts[i]);
 300
 301         kfree(dst_opts);
 302         return err;
 303 }
 304
 305 static void __team_options_mark_removed(struct team *team,
 306                                         const struct team_option *option,
 307                                         size_t option_count)
 308 {
 309         int i;
 310
 311         for (i = 0; i < option_count; i++, option++) {
 312                 struct team_option *del_opt;
 313
 314                 del_opt = __team_find_option(team, option->name);
 315                 if (del_opt)
 316                         __team_option_inst_mark_removed_option(team, del_opt);
 317         }
 318 }
 319
 320 static void __team_options_unregister(struct team *team,
 321                                       const struct team_option *option,
 322                                       size_t option_count)
 323 {
 324         int i;
 325
 326         for (i = 0; i < option_count; i++, option++) {
 327                 struct team_option *del_opt;
 328
 329                 del_opt = __team_find_option(team, option->name);
 330                 if (del_opt) {
 331                         __team_option_inst_del_option(team, del_opt);
 332                         list_del(&del_opt->list);
 333                         kfree(del_opt);
 334                 }
 335         }
 336 }
 337
 338 static void __team_options_change_check(struct team *team);
 339
 340 int team_options_register(struct team *team,
 341                           const struct team_option *option,
 342                           size_t option_count)
 343 {
 344         int err;
 345
 346         err = __team_options_register(team, option, option_count);
 347         if (err)
 348                 return err;
 349         __team_options_change_check(team);
 350         return 0;
 351 }
 352 EXPORT_SYMBOL(team_options_register);
 353
 354 void team_options_unregister(struct team *team,
 355                              const struct team_option *option,
 356                              size_t option_count)
 357 {
 358         __team_options_mark_removed(team, option, option_count);
 359         __team_options_change_check(team);
 360         __team_options_unregister(team, option, option_count);
 361 }
 362 EXPORT_SYMBOL(team_options_unregister);
 363
 364 static int team_option_get(struct team *team,
 365                            struct team_option_inst *opt_inst,
 366                            struct team_gsetter_ctx *ctx)
 367 {
 368         if (!opt_inst->option->getter)
 369                 return -EOPNOTSUPP;
 370         return opt_inst->option->getter(team, ctx);
 371 }
 372
 373 static int team_option_set(struct team *team,
 374                            struct team_option_inst *opt_inst,
 375                            struct team_gsetter_ctx *ctx)
 376 {
 377         if (!opt_inst->option->setter)
 378                 return -EOPNOTSUPP;
 379         return opt_inst->option->setter(team, ctx);
 380 }
 381
 382 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
 383 {
 384         struct team_option_inst *opt_inst;
 385
 386         opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
 387         opt_inst->changed = true;
 388 }
 389 EXPORT_SYMBOL(team_option_inst_set_change);
 390
 391 void team_options_change_check(struct team *team)
 392 {
 393         __team_options_change_check(team);
 394 }
 395 EXPORT_SYMBOL(team_options_change_check);
 396
 397
 398 /****************
 399  * Mode handling
 400  ****************/
 401
 402 static LIST_HEAD(mode_list);
 403 static DEFINE_SPINLOCK(mode_list_lock);
 404
 405 struct team_mode_item {
 406         struct list_head list;
 407         const struct team_mode *mode;
 408 };
 409
 410 static struct team_mode_item *__find_mode(const char *kind)
 411 {
 412         struct team_mode_item *mitem;
 413
 414         list_for_each_entry(mitem, &mode_list, list) {
 415                 if (strcmp(mitem->mode->kind, kind) == 0)
 416                         return mitem;
 417         }
 418         return NULL;
 419 }
 420
 421 static bool is_good_mode_name(const char *name)
 422 {
 423         while (*name != '\0') {
 424                 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
 425                         return false;
 426                 name++;
 427         }
 428         return true;
 429 }
 430
 431 int team_mode_register(const struct team_mode *mode)
 432 {
 433         int err = 0;
 434         struct team_mode_item *mitem;
 435
 436         if (!is_good_mode_name(mode->kind) ||
 437             mode->priv_size > TEAM_MODE_PRIV_SIZE)
 438                 return -EINVAL;
 439
 440         mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
 441         if (!mitem)
 442                 return -ENOMEM;
 443
 444         spin_lock(&mode_list_lock);
 445         if (__find_mode(mode->kind)) {
 446                 err = -EEXIST;
 447                 kfree(mitem);
 448                 goto unlock;
 449         }
 450         mitem->mode = mode;
 451         list_add_tail(&mitem->list, &mode_list);
 452 unlock:
 453         spin_unlock(&mode_list_lock);
 454         return err;
 455 }
 456 EXPORT_SYMBOL(team_mode_register);
 457
 458 void team_mode_unregister(const struct team_mode *mode)
 459 {
 460         struct team_mode_item *mitem;
 461
 462         spin_lock(&mode_list_lock);
 463         mitem = __find_mode(mode->kind);
 464         if (mitem) {
 465                 list_del_init(&mitem->list);
 466                 kfree(mitem);
 467         }
 468         spin_unlock(&mode_list_lock);
 469 }
 470 EXPORT_SYMBOL(team_mode_unregister);
 471
 472 static const struct team_mode *team_mode_get(const char *kind)
 473 {
 474         struct team_mode_item *mitem;
 475         const struct team_mode *mode = NULL;
 476
 477         spin_lock(&mode_list_lock);
 478         mitem = __find_mode(kind);
 479         if (!mitem) {
 480                 spin_unlock(&mode_list_lock);
 481                 request_module("team-mode-%s", kind);
 482                 spin_lock(&mode_list_lock);
 483                 mitem = __find_mode(kind);
 484         }
 485         if (mitem) {
 486                 mode = mitem->mode;
 487                 if (!try_module_get(mode->owner))
 488                         mode = NULL;
 489         }
 490
 491         spin_unlock(&mode_list_lock);
 492         return mode;
 493 }
 494
 495 static void team_mode_put(const struct team_mode *mode)
 496 {
 497         module_put(mode->owner);
 498 }
 499
 500 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
 501 {
 502         dev_kfree_skb_any(skb);
 503         return false;
 504 }
 505
 506 static rx_handler_result_t team_dummy_receive(struct team *team,
 507                                               struct team_port *port,
 508                                               struct sk_buff *skb)
 509 {
 510         return RX_HANDLER_ANOTHER;
 511 }
 512
 513 static const struct team_mode __team_no_mode = {
 514         .kind           = "*NOMODE*",
 515 };
 516
 517 static bool team_is_mode_set(struct team *team)
 518 {
 519         return team->mode != &__team_no_mode;
 520 }
 521
 522 static void team_set_no_mode(struct team *team)
 523 {
 524         team->user_carrier_enabled = false;
 525         team->mode = &__team_no_mode;
 526 }
 527
 528 static void team_adjust_ops(struct team *team)
 529 {
 530         /*
 531          * To avoid checks in rx/tx skb paths, ensure here that non-null and
 532          * correct ops are always set.
 533          */
 534
 535         if (!team->en_port_count || !team_is_mode_set(team) ||
 536             !team->mode->ops->transmit)
 537                 team->ops.transmit = team_dummy_transmit;
 538         else
 539                 team->ops.transmit = team->mode->ops->transmit;
 540
 541         if (!team->en_port_count || !team_is_mode_set(team) ||
 542             !team->mode->ops->receive)
 543                 team->ops.receive = team_dummy_receive;
 544         else
 545                 team->ops.receive = team->mode->ops->receive;
 546 }
 547
 548 /*
 549  * We can benefit from the fact that it's ensured no port is present
 550  * at the time of mode change. Therefore no packets are in fly so there's no
 551  * need to set mode operations in any special way.
 552  */
 553 static int __team_change_mode(struct team *team,
 554                               const struct team_mode *new_mode)
 555 {
 556         /* Check if mode was previously set and do cleanup if so */
 557         if (team_is_mode_set(team)) {
 558                 void (*exit_op)(struct team *team) = team->ops.exit;
 559
 560                 /* Clear ops area so no callback is called any longer */
 561                 memset(&team->ops, 0, sizeof(struct team_mode_ops));
 562                 team_adjust_ops(team);
 563
 564                 if (exit_op)
 565                         exit_op(team);
 566                 team_mode_put(team->mode);
 567                 team_set_no_mode(team);
 568                 /* zero private data area */
 569                 memset(&team->mode_priv, 0,
 570                        sizeof(struct team) - offsetof(struct team, mode_priv));
 571         }
 572
 573         if (!new_mode)
 574                 return 0;
 575
 576         if (new_mode->ops->init) {
 577                 int err;
 578
 579                 err = new_mode->ops->init(team);
 580                 if (err)
 581                         return err;
 582         }
 583
 584         team->mode = new_mode;
 585         memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
 586         team_adjust_ops(team);
 587
 588         return 0;
 589 }
 590
 591 static int team_change_mode(struct team *team, const char *kind)
 592 {
 593         const struct team_mode *new_mode;
 594         struct net_device *dev = team->dev;
 595         int err;
 596
 597         if (!list_empty(&team->port_list)) {
 598                 netdev_err(dev, "No ports can be present during mode change\n");
 599                 return -EBUSY;
 600         }
 601
 602         if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
 603                 netdev_err(dev, "Unable to change to the same mode the team is in\n");
 604                 return -EINVAL;
 605         }
 606
 607         new_mode = team_mode_get(kind);
 608         if (!new_mode) {
 609                 netdev_err(dev, "Mode \"%s\" not found\n", kind);
 610                 return -EINVAL;
 611         }
 612
 613         err = __team_change_mode(team, new_mode);
 614         if (err) {
 615                 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
 616                 team_mode_put(new_mode);
 617                 return err;
 618         }
 619
 620         netdev_info(dev, "Mode changed to \"%s\"\n", kind);
 621         return 0;
 622 }
 623
 624
 625 /*********************
 626  * Peers notification
 627  *********************/
 628
 629 static void team_notify_peers_work(struct work_struct *work)
 630 {
 631         struct team *team;
 632         int val;
 633
 634         team = container_of(work, struct team, notify_peers.dw.work);
 635
 636         if (!rtnl_trylock()) {
 637                 schedule_delayed_work(&team->notify_peers.dw, 0);
 638                 return;
 639         }
 640         val = atomic_dec_if_positive(&team->notify_peers.count_pending);
 641         if (val < 0) {
 642                 rtnl_unlock();
 643                 return;
 644         }
 645         call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
 646         rtnl_unlock();
 647         if (val)
 648                 schedule_delayed_work(&team->notify_peers.dw,
 649                                       msecs_to_jiffies(team->notify_peers.interval));
 650 }
 651
 652 static void team_notify_peers(struct team *team)
 653 {
 654         if (!team->notify_peers.count || !netif_running(team->dev))
 655                 return;
 656         atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
 657         schedule_delayed_work(&team->notify_peers.dw, 0);
 658 }
 659
 660 static void team_notify_peers_init(struct team *team)
 661 {
 662         INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
 663 }
 664
 665 static void team_notify_peers_fini(struct team *team)
 666 {
 667         cancel_delayed_work_sync(&team->notify_peers.dw);
 668 }
 669
 670
 671 /*******************************
 672  * Send multicast group rejoins
 673  *******************************/
 674
 675 static void team_mcast_rejoin_work(struct work_struct *work)
 676 {
 677         struct team *team;
 678         int val;
 679
 680         team = container_of(work, struct team, mcast_rejoin.dw.work);
 681
 682         if (!rtnl_trylock()) {
 683                 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 684                 return;
 685         }
 686         val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending);
 687         if (val < 0) {
 688                 rtnl_unlock();
 689                 return;
 690         }
 691         call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
 692         rtnl_unlock();
 693         if (val)
 694                 schedule_delayed_work(&team->mcast_rejoin.dw,
 695                                       msecs_to_jiffies(team->mcast_rejoin.interval));
 696 }
 697
 698 static void team_mcast_rejoin(struct team *team)
 699 {
 700         if (!team->mcast_rejoin.count || !netif_running(team->dev))
 701                 return;
 702         atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
 703         schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 704 }
 705
 706 static void team_mcast_rejoin_init(struct team *team)
 707 {
 708         INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
 709 }
 710
 711 static void team_mcast_rejoin_fini(struct team *team)
 712 {
 713         cancel_delayed_work_sync(&team->mcast_rejoin.dw);
 714 }
 715
 716
 717 /************************
 718  * Rx path frame handler
 719  ************************/
 720
 721 /* note: already called with rcu_read_lock */
 722 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
 723 {
 724         struct sk_buff *skb = *pskb;
 725         struct team_port *port;
 726         struct team *team;
 727         rx_handler_result_t res;
 728
 729         skb = skb_share_check(skb, GFP_ATOMIC);
 730         if (!skb)
 731                 return RX_HANDLER_CONSUMED;
 732
 733         *pskb = skb;
 734
 735         port = team_port_get_rcu(skb->dev);
 736         team = port->team;
 737         if (!team_port_enabled(port)) {
 738                 /* allow exact match delivery for disabled ports */
 739                 res = RX_HANDLER_EXACT;
 740         } else {
 741                 res = team->ops.receive(team, port, skb);
 742         }
 743         if (res == RX_HANDLER_ANOTHER) {
 744                 struct team_pcpu_stats *pcpu_stats;
 745
 746                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
 747                 u64_stats_update_begin(&pcpu_stats->syncp);
 748                 pcpu_stats->rx_packets++;
 749                 pcpu_stats->rx_bytes += skb->len;
 750                 if (skb->pkt_type == PACKET_MULTICAST)
 751                         pcpu_stats->rx_multicast++;
 752                 u64_stats_update_end(&pcpu_stats->syncp);
 753
 754                 skb->dev = team->dev;
 755         } else if (res == RX_HANDLER_EXACT) {
 756                 this_cpu_inc(team->pcpu_stats->rx_nohandler);
 757         } else {
 758                 this_cpu_inc(team->pcpu_stats->rx_dropped);
 759         }
 760
 761         return res;
 762 }
 763
 764
 765 /*************************************
 766  * Multiqueue Tx port select override
 767  *************************************/
 768
 769 static int team_queue_override_init(struct team *team)
 770 {
 771         struct list_head *listarr;
 772         unsigned int queue_cnt = team->dev->num_tx_queues - 1;
 773         unsigned int i;
 774
 775         if (!queue_cnt)
 776                 return 0;
 777         listarr = kmalloc_array(queue_cnt, sizeof(struct list_head),
 778                                 GFP_KERNEL);
 779         if (!listarr)
 780                 return -ENOMEM;
 781         team->qom_lists = listarr;
 782         for (i = 0; i < queue_cnt; i++)
 783                 INIT_LIST_HEAD(listarr++);
 784         return 0;
 785 }
 786
 787 static void team_queue_override_fini(struct team *team)
 788 {
 789         kfree(team->qom_lists);
 790 }
 791
 792 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
 793 {
 794         return &team->qom_lists[queue_id - 1];
 795 }
 796
 797 /*
 798  * note: already called with rcu_read_lock
 799  */
 800 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
 801 {
 802         struct list_head *qom_list;
 803         struct team_port *port;
 804
 805         if (!team->queue_override_enabled || !skb->queue_mapping)
 806                 return false;
 807         qom_list = __team_get_qom_list(team, skb->queue_mapping);
 808         list_for_each_entry_rcu(port, qom_list, qom_list) {
 809                 if (!team_dev_queue_xmit(team, port, skb))
 810                         return true;
 811         }
 812         return false;
 813 }
 814
 815 static void __team_queue_override_port_del(struct team *team,
 816                                            struct team_port *port)
 817 {
 818         if (!port->queue_id)
 819                 return;
 820         list_del_rcu(&port->qom_list);
 821 }
 822
 823 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
 824                                                       struct team_port *cur)
 825 {
 826         if (port->priority < cur->priority)
 827                 return true;
 828         if (port->priority > cur->priority)
 829                 return false;
 830         if (port->index < cur->index)
 831                 return true;
 832         return false;
 833 }
 834
 835 static void __team_queue_override_port_add(struct team *team,
 836                                            struct team_port *port)
 837 {
 838         struct team_port *cur;
 839         struct list_head *qom_list;
 840         struct list_head *node;
 841
 842         if (!port->queue_id)
 843                 return;
 844         qom_list = __team_get_qom_list(team, port->queue_id);
 845         node = qom_list;
 846         list_for_each_entry(cur, qom_list, qom_list) {
 847                 if (team_queue_override_port_has_gt_prio_than(port, cur))
 848                         break;
 849                 node = &cur->qom_list;
 850         }
 851         list_add_tail_rcu(&port->qom_list, node);
 852 }
 853
 854 static void __team_queue_override_enabled_check(struct team *team)
 855 {
 856         struct team_port *port;
 857         bool enabled = false;
 858
 859         list_for_each_entry(port, &team->port_list, list) {
 860                 if (port->queue_id) {
 861                         enabled = true;
 862                         break;
 863                 }
 864         }
 865         if (enabled == team->queue_override_enabled)
 866                 return;
 867         netdev_dbg(team->dev, "%s queue override\n",
 868                    enabled ? "Enabling" : "Disabling");
 869         team->queue_override_enabled = enabled;
 870 }
 871
 872 static void team_queue_override_port_prio_changed(struct team *team,
 873                                                   struct team_port *port)
 874 {
 875         if (!port->queue_id || team_port_enabled(port))
 876                 return;
 877         __team_queue_override_port_del(team, port);
 878         __team_queue_override_port_add(team, port);
 879         __team_queue_override_enabled_check(team);
 880 }
 881
 882 static void team_queue_override_port_change_queue_id(struct team *team,
 883                                                      struct team_port *port,
 884                                                      u16 new_queue_id)
 885 {
 886         if (team_port_enabled(port)) {
 887                 __team_queue_override_port_del(team, port);
 888                 port->queue_id = new_queue_id;
 889                 __team_queue_override_port_add(team, port);
 890                 __team_queue_override_enabled_check(team);
 891         } else {
 892                 port->queue_id = new_queue_id;
 893         }
 894 }
 895
 896 static void team_queue_override_port_add(struct team *team,
 897                                          struct team_port *port)
 898 {
 899         __team_queue_override_port_add(team, port);
 900         __team_queue_override_enabled_check(team);
 901 }
 902
 903 static void team_queue_override_port_del(struct team *team,
 904                                          struct team_port *port)
 905 {
 906         __team_queue_override_port_del(team, port);
 907         __team_queue_override_enabled_check(team);
 908 }
 909
 910
 911 /****************
 912  * Port handling
 913  ****************/
 914
 915 static bool team_port_find(const struct team *team,
 916                            const struct team_port *port)
 917 {
 918         struct team_port *cur;
 919
 920         list_for_each_entry(cur, &team->port_list, list)
 921                 if (cur == port)
 922                         return true;
 923         return false;
 924 }
 925
 926 /*
 927  * Enable/disable port by adding to enabled port hashlist and setting
 928  * port->index (Might be racy so reader could see incorrect ifindex when
 929  * processing a flying packet, but that is not a problem). Write guarded
 930  * by team->lock.
 931  */
 932 static void team_port_enable(struct team *team,
 933                              struct team_port *port)
 934 {
 935         if (team_port_enabled(port))
 936                 return;
 937         port->index = team->en_port_count++;
 938         hlist_add_head_rcu(&port->hlist,
 939                            team_port_index_hash(team, port->index));
 940         team_adjust_ops(team);
 941         team_queue_override_port_add(team, port);
 942         if (team->ops.port_enabled)
 943                 team->ops.port_enabled(team, port);
 944         team_notify_peers(team);
 945         team_mcast_rejoin(team);
 946         team_lower_state_changed(port);
 947 }
 948
 949 static void __reconstruct_port_hlist(struct team *team, int rm_index)
 950 {
 951         int i;
 952         struct team_port *port;
 953
 954         for (i = rm_index + 1; i < team->en_port_count; i++) {
 955                 port = team_get_port_by_index(team, i);
 956                 hlist_del_rcu(&port->hlist);
 957                 port->index--;
 958                 hlist_add_head_rcu(&port->hlist,
 959                                    team_port_index_hash(team, port->index));
 960         }
 961 }
 962
 963 static void team_port_disable(struct team *team,
 964                               struct team_port *port)
 965 {
 966         if (!team_port_enabled(port))
 967                 return;
 968         if (team->ops.port_disabled)
 969                 team->ops.port_disabled(team, port);
 970         hlist_del_rcu(&port->hlist);
 971         __reconstruct_port_hlist(team, port->index);
 972         port->index = -1;
 973         team->en_port_count--;
 974         team_queue_override_port_del(team, port);
 975         team_adjust_ops(team);
 976         team_lower_state_changed(port);
 977 }
 978
 979 #define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
 980                             NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
 981                             NETIF_F_HIGHDMA | NETIF_F_LRO)
 982
 983 #define TEAM_ENC_FEATURES       (NETIF_F_HW_CSUM | NETIF_F_SG | \
 984                                  NETIF_F_RXCSUM | NETIF_F_ALL_TSO)
 985
 986 static void __team_compute_features(struct team *team)
 987 {
 988         struct team_port *port;
 989         netdev_features_t vlan_features = TEAM_VLAN_FEATURES &
 990                                           NETIF_F_ALL_FOR_ALL;
 991         netdev_features_t enc_features  = TEAM_ENC_FEATURES;
 992         unsigned short max_hard_header_len = ETH_HLEN;
 993         unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
 994                                         IFF_XMIT_DST_RELEASE_PERM;
 995
 996         list_for_each_entry(port, &team->port_list, list) {
 997                 vlan_features = netdev_increment_features(vlan_features,
 998                                         port->dev->vlan_features,
 999                                         TEAM_VLAN_FEATURES);
1000                 enc_features =
1001                         netdev_increment_features(enc_features,
1002                                                   port->dev->hw_enc_features,
1003                                                   TEAM_ENC_FEATURES);
1004
1005
1006                 dst_release_flag &= port->dev->priv_flags;
1007                 if (port->dev->hard_header_len > max_hard_header_len)
1008                         max_hard_header_len = port->dev->hard_header_len;
1009         }
1010
1011         team->dev->vlan_features = vlan_features;
1012         team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL |
1013                                      NETIF_F_GSO_UDP_L4;
1014         team->dev->hard_header_len = max_hard_header_len;
1015
1016         team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1017         if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1018                 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1019 }
1020
1021 static void team_compute_features(struct team *team)
1022 {
1023         mutex_lock(&team->lock);
1024         __team_compute_features(team);
1025         mutex_unlock(&team->lock);
1026         netdev_change_features(team->dev);
1027 }
1028
1029 static int team_port_enter(struct team *team, struct team_port *port)
1030 {
1031         int err = 0;
1032
1033         dev_hold(team->dev);
1034         if (team->ops.port_enter) {
1035                 err = team->ops.port_enter(team, port);
1036                 if (err) {
1037                         netdev_err(team->dev, "Device %s failed to enter team mode\n",
1038                                    port->dev->name);
1039                         goto err_port_enter;
1040                 }
1041         }
1042
1043         return 0;
1044
1045 err_port_enter:
1046         dev_put(team->dev);
1047
1048         return err;
1049 }
1050
1051 static void team_port_leave(struct team *team, struct team_port *port)
1052 {
1053         if (team->ops.port_leave)
1054                 team->ops.port_leave(team, port);
1055         dev_put(team->dev);
1056 }
1057
1058 #ifdef CONFIG_NET_POLL_CONTROLLER
1059 static int __team_port_enable_netpoll(struct team_port *port)
1060 {
1061         struct netpoll *np;
1062         int err;
1063
1064         np = kzalloc(sizeof(*np), GFP_KERNEL);
1065         if (!np)
1066                 return -ENOMEM;
1067
1068         err = __netpoll_setup(np, port->dev);
1069         if (err) {
1070                 kfree(np);
1071                 return err;
1072         }
1073         port->np = np;
1074         return err;
1075 }
1076
1077 static int team_port_enable_netpoll(struct team_port *port)
1078 {
1079         if (!port->team->dev->npinfo)
1080                 return 0;
1081
1082         return __team_port_enable_netpoll(port);
1083 }
1084
1085 static void team_port_disable_netpoll(struct team_port *port)
1086 {
1087         struct netpoll *np = port->np;
1088
1089         if (!np)
1090                 return;
1091         port->np = NULL;
1092
1093         __netpoll_free(np);
1094 }
1095 #else
1096 static int team_port_enable_netpoll(struct team_port *port)
1097 {
1098         return 0;
1099 }
1100 static void team_port_disable_netpoll(struct team_port *port)
1101 {
1102 }
1103 #endif
1104
1105 static int team_upper_dev_link(struct team *team, struct team_port *port,
1106                                struct netlink_ext_ack *extack)
1107 {
1108         struct netdev_lag_upper_info lag_upper_info;
1109         int err;
1110
1111         lag_upper_info.tx_type = team->mode->lag_tx_type;
1112         lag_upper_info.hash_type = NETDEV_LAG_HASH_UNKNOWN;
1113         err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1114                                            &lag_upper_info, extack);
1115         if (err)
1116                 return err;
1117         port->dev->priv_flags |= IFF_TEAM_PORT;
1118         return 0;
1119 }
1120
1121 static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1122 {
1123         netdev_upper_dev_unlink(port->dev, team->dev);
1124         port->dev->priv_flags &= ~IFF_TEAM_PORT;
1125 }
1126
1127 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1128 static int team_dev_type_check_change(struct net_device *dev,
1129                                       struct net_device *port_dev);
1130
1131 static int team_port_add(struct team *team, struct net_device *port_dev,
1132                          struct netlink_ext_ack *extack)
1133 {
1134         struct net_device *dev = team->dev;
1135         struct team_port *port;
1136         char *portname = port_dev->name;
1137         int err;
1138
1139         if (port_dev->flags & IFF_LOOPBACK) {
1140                 NL_SET_ERR_MSG(extack, "Loopback device can't be added as a team port");
1141                 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1142                            portname);
1143                 return -EINVAL;
1144         }
1145
1146         if (team_port_exists(port_dev)) {
1147                 NL_SET_ERR_MSG(extack, "Device is already a port of a team device");
1148                 netdev_err(dev, "Device %s is already a port "
1149                                 "of a team device\n", portname);
1150                 return -EBUSY;
1151         }
1152
1153         if (dev == port_dev) {
1154                 NL_SET_ERR_MSG(extack, "Cannot enslave team device to itself");
1155                 netdev_err(dev, "Cannot enslave team device to itself\n");
1156                 return -EINVAL;
1157         }
1158
1159         if (netdev_has_upper_dev(dev, port_dev)) {
1160                 NL_SET_ERR_MSG(extack, "Device is already an upper device of the team interface");
1161                 netdev_err(dev, "Device %s is already an upper device of the team interface\n",
1162                            portname);
1163                 return -EBUSY;
1164         }
1165
1166         if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1167             vlan_uses_dev(dev)) {
1168                 NL_SET_ERR_MSG(extack, "Device is VLAN challenged and team device has VLAN set up");
1169                 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1170                            portname);
1171                 return -EPERM;
1172         }
1173
1174         err = team_dev_type_check_change(dev, port_dev);
1175         if (err)
1176                 return err;
1177
1178         if (port_dev->flags & IFF_UP) {
1179                 NL_SET_ERR_MSG(extack, "Device is up. Set it down before adding it as a team port");
1180                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1181                            portname);
1182                 return -EBUSY;
1183         }
1184
1185         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1186                        GFP_KERNEL);
1187         if (!port)
1188                 return -ENOMEM;
1189
1190         port->dev = port_dev;
1191         port->team = team;
1192         INIT_LIST_HEAD(&port->qom_list);
1193
1194         port->orig.mtu = port_dev->mtu;
1195         err = dev_set_mtu(port_dev, dev->mtu);
1196         if (err) {
1197                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1198                 goto err_set_mtu;
1199         }
1200
1201         memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1202
1203         err = team_port_enter(team, port);
1204         if (err) {
1205                 netdev_err(dev, "Device %s failed to enter team mode\n",
1206                            portname);
1207                 goto err_port_enter;
1208         }
1209
1210         err = dev_open(port_dev, extack);
1211         if (err) {
1212                 netdev_dbg(dev, "Device %s opening failed\n",
1213                            portname);
1214                 goto err_dev_open;
1215         }
1216
1217         err = vlan_vids_add_by_dev(port_dev, dev);
1218         if (err) {
1219                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1220                                 portname);
1221                 goto err_vids_add;
1222         }
1223
1224         err = team_port_enable_netpoll(port);
1225         if (err) {
1226                 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1227                            portname);
1228                 goto err_enable_netpoll;
1229         }
1230
1231         if (!(dev->features & NETIF_F_LRO))
1232                 dev_disable_lro(port_dev);
1233
1234         err = netdev_rx_handler_register(port_dev, team_handle_frame,
1235                                          port);
1236         if (err) {
1237                 netdev_err(dev, "Device %s failed to register rx_handler\n",
1238                            portname);
1239                 goto err_handler_register;
1240         }
1241
1242         err = team_upper_dev_link(team, port, extack);
1243         if (err) {
1244                 netdev_err(dev, "Device %s failed to set upper link\n",
1245                            portname);
1246                 goto err_set_upper_link;
1247         }
1248
1249         err = __team_option_inst_add_port(team, port);
1250         if (err) {
1251                 netdev_err(dev, "Device %s failed to add per-port options\n",
1252                            portname);
1253                 goto err_option_port_add;
1254         }
1255
1256         /* set promiscuity level to new slave */
1257         if (dev->flags & IFF_PROMISC) {
1258                 err = dev_set_promiscuity(port_dev, 1);
1259                 if (err)
1260                         goto err_set_slave_promisc;
1261         }
1262
1263         /* set allmulti level to new slave */
1264         if (dev->flags & IFF_ALLMULTI) {
1265                 err = dev_set_allmulti(port_dev, 1);
1266                 if (err) {
1267                         if (dev->flags & IFF_PROMISC)
1268                                 dev_set_promiscuity(port_dev, -1);
1269                         goto err_set_slave_promisc;
1270                 }
1271         }
1272
1273         netif_addr_lock_bh(dev);
1274         dev_uc_sync_multiple(port_dev, dev);
1275         dev_mc_sync_multiple(port_dev, dev);
1276         netif_addr_unlock_bh(dev);
1277
1278         port->index = -1;
1279         list_add_tail_rcu(&port->list, &team->port_list);
1280         team_port_enable(team, port);
1281         __team_compute_features(team);
1282         __team_port_change_port_added(port, !!netif_oper_up(port_dev));
1283         __team_options_change_check(team);
1284
1285         netdev_info(dev, "Port device %s added\n", portname);
1286
1287         return 0;
1288
1289 err_set_slave_promisc:
1290         __team_option_inst_del_port(team, port);
1291
1292 err_option_port_add:
1293         team_upper_dev_unlink(team, port);
1294
1295 err_set_upper_link:
1296         netdev_rx_handler_unregister(port_dev);
1297
1298 err_handler_register:
1299         team_port_disable_netpoll(port);
1300
1301 err_enable_netpoll:
1302         vlan_vids_del_by_dev(port_dev, dev);
1303
1304 err_vids_add:
1305         dev_close(port_dev);
1306
1307 err_dev_open:
1308         team_port_leave(team, port);
1309         team_port_set_orig_dev_addr(port);
1310
1311 err_port_enter:
1312         dev_set_mtu(port_dev, port->orig.mtu);
1313
1314 err_set_mtu:
1315         kfree(port);
1316
1317         return err;
1318 }
1319
1320 static void __team_port_change_port_removed(struct team_port *port);
1321
1322 static int team_port_del(struct team *team, struct net_device *port_dev)
1323 {
1324         struct net_device *dev = team->dev;
1325         struct team_port *port;
1326         char *portname = port_dev->name;
1327
1328         port = team_port_get_rtnl(port_dev);
1329         if (!port || !team_port_find(team, port)) {
1330                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1331                            portname);
1332                 return -ENOENT;
1333         }
1334
1335         team_port_disable(team, port);
1336         list_del_rcu(&port->list);
1337
1338         if (dev->flags & IFF_PROMISC)
1339                 dev_set_promiscuity(port_dev, -1);
1340         if (dev->flags & IFF_ALLMULTI)
1341                 dev_set_allmulti(port_dev, -1);
1342
1343         team_upper_dev_unlink(team, port);
1344         netdev_rx_handler_unregister(port_dev);
1345         team_port_disable_netpoll(port);
1346         vlan_vids_del_by_dev(port_dev, dev);
1347         dev_uc_unsync(port_dev, dev);
1348         dev_mc_unsync(port_dev, dev);
1349         dev_close(port_dev);
1350         team_port_leave(team, port);
1351
1352         __team_option_inst_mark_removed_port(team, port);
1353         __team_options_change_check(team);
1354         __team_option_inst_del_port(team, port);
1355         __team_port_change_port_removed(port);
1356
1357         team_port_set_orig_dev_addr(port);
1358         dev_set_mtu(port_dev, port->orig.mtu);
1359         kfree_rcu(port, rcu);
1360         netdev_info(dev, "Port device %s removed\n", portname);
1361         __team_compute_features(team);
1362
1363         return 0;
1364 }
1365
1366
1367 /*****************
1368  * Net device ops
1369  *****************/
1370
1371 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1372 {
1373         ctx->data.str_val = team->mode->kind;
1374         return 0;
1375 }
1376
1377 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1378 {
1379         return team_change_mode(team, ctx->data.str_val);
1380 }
1381
1382 static int team_notify_peers_count_get(struct team *team,
1383                                        struct team_gsetter_ctx *ctx)
1384 {
1385         ctx->data.u32_val = team->notify_peers.count;
1386         return 0;
1387 }
1388
1389 static int team_notify_peers_count_set(struct team *team,
1390                                        struct team_gsetter_ctx *ctx)
1391 {
1392         team->notify_peers.count = ctx->data.u32_val;
1393         return 0;
1394 }
1395
1396 static int team_notify_peers_interval_get(struct team *team,
1397                                           struct team_gsetter_ctx *ctx)
1398 {
1399         ctx->data.u32_val = team->notify_peers.interval;
1400         return 0;
1401 }
1402
1403 static int team_notify_peers_interval_set(struct team *team,
1404                                           struct team_gsetter_ctx *ctx)
1405 {
1406         team->notify_peers.interval = ctx->data.u32_val;
1407         return 0;
1408 }
1409
1410 static int team_mcast_rejoin_count_get(struct team *team,
1411                                        struct team_gsetter_ctx *ctx)
1412 {
1413         ctx->data.u32_val = team->mcast_rejoin.count;
1414         return 0;
1415 }
1416
1417 static int team_mcast_rejoin_count_set(struct team *team,
1418                                        struct team_gsetter_ctx *ctx)
1419 {
1420         team->mcast_rejoin.count = ctx->data.u32_val;
1421         return 0;
1422 }
1423
1424 static int team_mcast_rejoin_interval_get(struct team *team,
1425                                           struct team_gsetter_ctx *ctx)
1426 {
1427         ctx->data.u32_val = team->mcast_rejoin.interval;
1428         return 0;
1429 }
1430
1431 static int team_mcast_rejoin_interval_set(struct team *team,
1432                                           struct team_gsetter_ctx *ctx)
1433 {
1434         team->mcast_rejoin.interval = ctx->data.u32_val;
1435         return 0;
1436 }
1437
1438 static int team_port_en_option_get(struct team *team,
1439                                    struct team_gsetter_ctx *ctx)
1440 {
1441         struct team_port *port = ctx->info->port;
1442
1443         ctx->data.bool_val = team_port_enabled(port);
1444         return 0;
1445 }
1446
1447 static int team_port_en_option_set(struct team *team,
1448                                    struct team_gsetter_ctx *ctx)
1449 {
1450         struct team_port *port = ctx->info->port;
1451
1452         if (ctx->data.bool_val)
1453                 team_port_enable(team, port);
1454         else
1455                 team_port_disable(team, port);
1456         return 0;
1457 }
1458
1459 static int team_user_linkup_option_get(struct team *team,
1460                                        struct team_gsetter_ctx *ctx)
1461 {
1462         struct team_port *port = ctx->info->port;
1463
1464         ctx->data.bool_val = port->user.linkup;
1465         return 0;
1466 }
1467
1468 static void __team_carrier_check(struct team *team);
1469
1470 static int team_user_linkup_option_set(struct team *team,
1471                                        struct team_gsetter_ctx *ctx)
1472 {
1473         struct team_port *port = ctx->info->port;
1474
1475         port->user.linkup = ctx->data.bool_val;
1476         team_refresh_port_linkup(port);
1477         __team_carrier_check(port->team);
1478         return 0;
1479 }
1480
1481 static int team_user_linkup_en_option_get(struct team *team,
1482                                           struct team_gsetter_ctx *ctx)
1483 {
1484         struct team_port *port = ctx->info->port;
1485
1486         ctx->data.bool_val = port->user.linkup_enabled;
1487         return 0;
1488 }
1489
1490 static int team_user_linkup_en_option_set(struct team *team,
1491                                           struct team_gsetter_ctx *ctx)
1492 {
1493         struct team_port *port = ctx->info->port;
1494
1495         port->user.linkup_enabled = ctx->data.bool_val;
1496         team_refresh_port_linkup(port);
1497         __team_carrier_check(port->team);
1498         return 0;
1499 }
1500
1501 static int team_priority_option_get(struct team *team,
1502                                     struct team_gsetter_ctx *ctx)
1503 {
1504         struct team_port *port = ctx->info->port;
1505
1506         ctx->data.s32_val = port->priority;
1507         return 0;
1508 }
1509
1510 static int team_priority_option_set(struct team *team,
1511                                     struct team_gsetter_ctx *ctx)
1512 {
1513         struct team_port *port = ctx->info->port;
1514         s32 priority = ctx->data.s32_val;
1515
1516         if (port->priority == priority)
1517                 return 0;
1518         port->priority = priority;
1519         team_queue_override_port_prio_changed(team, port);
1520         return 0;
1521 }
1522
1523 static int team_queue_id_option_get(struct team *team,
1524                                     struct team_gsetter_ctx *ctx)
1525 {
1526         struct team_port *port = ctx->info->port;
1527
1528         ctx->data.u32_val = port->queue_id;
1529         return 0;
1530 }
1531
1532 static int team_queue_id_option_set(struct team *team,
1533                                     struct team_gsetter_ctx *ctx)
1534 {
1535         struct team_port *port = ctx->info->port;
1536         u16 new_queue_id = ctx->data.u32_val;
1537
1538         if (port->queue_id == new_queue_id)
1539                 return 0;
1540         if (new_queue_id >= team->dev->real_num_tx_queues)
1541                 return -EINVAL;
1542         team_queue_override_port_change_queue_id(team, port, new_queue_id);
1543         return 0;
1544 }
1545
1546 static const struct team_option team_options[] = {
1547         {
1548                 .name = "mode",
1549                 .type = TEAM_OPTION_TYPE_STRING,
1550                 .getter = team_mode_option_get,
1551                 .setter = team_mode_option_set,
1552         },
1553         {
1554                 .name = "notify_peers_count",
1555                 .type = TEAM_OPTION_TYPE_U32,
1556                 .getter = team_notify_peers_count_get,
1557                 .setter = team_notify_peers_count_set,
1558         },
1559         {
1560                 .name = "notify_peers_interval",
1561                 .type = TEAM_OPTION_TYPE_U32,
1562                 .getter = team_notify_peers_interval_get,
1563                 .setter = team_notify_peers_interval_set,
1564         },
1565         {
1566                 .name = "mcast_rejoin_count",
1567                 .type = TEAM_OPTION_TYPE_U32,
1568                 .getter = team_mcast_rejoin_count_get,
1569                 .setter = team_mcast_rejoin_count_set,
1570         },
1571         {
1572                 .name = "mcast_rejoin_interval",
1573                 .type = TEAM_OPTION_TYPE_U32,
1574                 .getter = team_mcast_rejoin_interval_get,
1575                 .setter = team_mcast_rejoin_interval_set,
1576         },
1577         {
1578                 .name = "enabled",
1579                 .type = TEAM_OPTION_TYPE_BOOL,
1580                 .per_port = true,
1581                 .getter = team_port_en_option_get,
1582                 .setter = team_port_en_option_set,
1583         },
1584         {
1585                 .name = "user_linkup",
1586                 .type = TEAM_OPTION_TYPE_BOOL,
1587                 .per_port = true,
1588                 .getter = team_user_linkup_option_get,
1589                 .setter = team_user_linkup_option_set,
1590         },
1591         {
1592                 .name = "user_linkup_enabled",
1593                 .type = TEAM_OPTION_TYPE_BOOL,
1594                 .per_port = true,
1595                 .getter = team_user_linkup_en_option_get,
1596                 .setter = team_user_linkup_en_option_set,
1597         },
1598         {
1599                 .name = "priority",
1600                 .type = TEAM_OPTION_TYPE_S32,
1601                 .per_port = true,
1602                 .getter = team_priority_option_get,
1603                 .setter = team_priority_option_set,
1604         },
1605         {
1606                 .name = "queue_id",
1607                 .type = TEAM_OPTION_TYPE_U32,
1608                 .per_port = true,
1609                 .getter = team_queue_id_option_get,
1610                 .setter = team_queue_id_option_set,
1611         },
1612 };
1613
1614
1615 static int team_init(struct net_device *dev)
1616 {
1617         struct team *team = netdev_priv(dev);
1618         int i;
1619         int err;
1620
1621         team->dev = dev;
1622         mutex_init(&team->lock);
1623         team_set_no_mode(team);
1624
1625         team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1626         if (!team->pcpu_stats)
1627                 return -ENOMEM;
1628
1629         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1630                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1631         INIT_LIST_HEAD(&team->port_list);
1632         err = team_queue_override_init(team);
1633         if (err)
1634                 goto err_team_queue_override_init;
1635
1636         team_adjust_ops(team);
1637
1638         INIT_LIST_HEAD(&team->option_list);
1639         INIT_LIST_HEAD(&team->option_inst_list);
1640
1641         team_notify_peers_init(team);
1642         team_mcast_rejoin_init(team);
1643
1644         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1645         if (err)
1646                 goto err_options_register;
1647         netif_carrier_off(dev);
1648
1649         netdev_lockdep_set_classes(dev);
1650
1651         return 0;
1652
1653 err_options_register:
1654         team_mcast_rejoin_fini(team);
1655         team_notify_peers_fini(team);
1656         team_queue_override_fini(team);
1657 err_team_queue_override_init:
1658         free_percpu(team->pcpu_stats);
1659
1660         return err;
1661 }
1662
1663 static void team_uninit(struct net_device *dev)
1664 {
1665         struct team *team = netdev_priv(dev);
1666         struct team_port *port;
1667         struct team_port *tmp;
1668
1669         mutex_lock(&team->lock);
1670         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1671                 team_port_del(team, port->dev);
1672
1673         __team_change_mode(team, NULL); /* cleanup */
1674         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1675         team_mcast_rejoin_fini(team);
1676         team_notify_peers_fini(team);
1677         team_queue_override_fini(team);
1678         mutex_unlock(&team->lock);
1679         netdev_change_features(dev);
1680 }
1681
1682 static void team_destructor(struct net_device *dev)
1683 {
1684         struct team *team = netdev_priv(dev);
1685
1686         free_percpu(team->pcpu_stats);
1687 }
1688
1689 static int team_open(struct net_device *dev)
1690 {
1691         return 0;
1692 }
1693
1694 static int team_close(struct net_device *dev)
1695 {
1696         return 0;
1697 }
1698
1699 /*
1700  * note: already called with rcu_read_lock
1701  */
1702 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1703 {
1704         struct team *team = netdev_priv(dev);
1705         bool tx_success;
1706         unsigned int len = skb->len;
1707
1708         tx_success = team_queue_override_transmit(team, skb);
1709         if (!tx_success)
1710                 tx_success = team->ops.transmit(team, skb);
1711         if (tx_success) {
1712                 struct team_pcpu_stats *pcpu_stats;
1713
1714                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1715                 u64_stats_update_begin(&pcpu_stats->syncp);
1716                 pcpu_stats->tx_packets++;
1717                 pcpu_stats->tx_bytes += len;
1718                 u64_stats_update_end(&pcpu_stats->syncp);
1719         } else {
1720                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1721         }
1722
1723         return NETDEV_TX_OK;
1724 }
1725
1726 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1727                              struct net_device *sb_dev,
1728                              select_queue_fallback_t fallback)
1729 {
1730         /*
1731          * This helper function exists to help dev_pick_tx get the correct
1732          * destination queue.  Using a helper function skips a call to
1733          * skb_tx_hash and will put the skbs in the queue we expect on their
1734          * way down to the team driver.
1735          */
1736         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1737
1738         /*
1739          * Save the original txq to restore before passing to the driver
1740          */
1741         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1742
1743         if (unlikely(txq >= dev->real_num_tx_queues)) {
1744                 do {
1745                         txq -= dev->real_num_tx_queues;
1746                 } while (txq >= dev->real_num_tx_queues);
1747         }
1748         return txq;
1749 }
1750
1751 static void team_change_rx_flags(struct net_device *dev, int change)
1752 {
1753         struct team *team = netdev_priv(dev);
1754         struct team_port *port;
1755         int inc;
1756
1757         rcu_read_lock();
1758         list_for_each_entry_rcu(port, &team->port_list, list) {
1759                 if (change & IFF_PROMISC) {
1760                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1761                         dev_set_promiscuity(port->dev, inc);
1762                 }
1763                 if (change & IFF_ALLMULTI) {
1764                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1765                         dev_set_allmulti(port->dev, inc);
1766                 }
1767         }
1768         rcu_read_unlock();
1769 }
1770
1771 static void team_set_rx_mode(struct net_device *dev)
1772 {
1773         struct team *team = netdev_priv(dev);
1774         struct team_port *port;
1775
1776         rcu_read_lock();
1777         list_for_each_entry_rcu(port, &team->port_list, list) {
1778                 dev_uc_sync_multiple(port->dev, dev);
1779                 dev_mc_sync_multiple(port->dev, dev);
1780         }
1781         rcu_read_unlock();
1782 }
1783
1784 static int team_set_mac_address(struct net_device *dev, void *p)
1785 {
1786         struct sockaddr *addr = p;
1787         struct team *team = netdev_priv(dev);
1788         struct team_port *port;
1789
1790         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1791                 return -EADDRNOTAVAIL;
1792         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1793         mutex_lock(&team->lock);
1794         list_for_each_entry(port, &team->port_list, list)
1795                 if (team->ops.port_change_dev_addr)
1796                         team->ops.port_change_dev_addr(team, port);
1797         mutex_unlock(&team->lock);
1798         return 0;
1799 }
1800
1801 static int team_change_mtu(struct net_device *dev, int new_mtu)
1802 {
1803         struct team *team = netdev_priv(dev);
1804         struct team_port *port;
1805         int err;
1806
1807         /*
1808          * Alhough this is reader, it's guarded by team lock. It's not possible
1809          * to traverse list in reverse under rcu_read_lock
1810          */
1811         mutex_lock(&team->lock);
1812         team->port_mtu_change_allowed = true;
1813         list_for_each_entry(port, &team->port_list, list) {
1814                 err = dev_set_mtu(port->dev, new_mtu);
1815                 if (err) {
1816                         netdev_err(dev, "Device %s failed to change mtu",
1817                                    port->dev->name);
1818                         goto unwind;
1819                 }
1820         }
1821         team->port_mtu_change_allowed = false;
1822         mutex_unlock(&team->lock);
1823
1824         dev->mtu = new_mtu;
1825
1826         return 0;
1827
1828 unwind:
1829         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1830                 dev_set_mtu(port->dev, dev->mtu);
1831         team->port_mtu_change_allowed = false;
1832         mutex_unlock(&team->lock);
1833
1834         return err;
1835 }
1836
1837 static void
1838 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1839 {
1840         struct team *team = netdev_priv(dev);
1841         struct team_pcpu_stats *p;
1842         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1843         u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1844         unsigned int start;
1845         int i;
1846
1847         for_each_possible_cpu(i) {
1848                 p = per_cpu_ptr(team->pcpu_stats, i);
1849                 do {
1850                         start = u64_stats_fetch_begin_irq(&p->syncp);
1851                         rx_packets      = p->rx_packets;
1852                         rx_bytes        = p->rx_bytes;
1853                         rx_multicast    = p->rx_multicast;
1854                         tx_packets      = p->tx_packets;
1855                         tx_bytes        = p->tx_bytes;
1856                 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1857
1858                 stats->rx_packets       += rx_packets;
1859                 stats->rx_bytes         += rx_bytes;
1860                 stats->multicast        += rx_multicast;
1861                 stats->tx_packets       += tx_packets;
1862                 stats->tx_bytes         += tx_bytes;
1863                 /*
1864                  * rx_dropped, tx_dropped & rx_nohandler are u32,
1865                  * updated without syncp protection.
1866                  */
1867                 rx_dropped      += p->rx_dropped;
1868                 tx_dropped      += p->tx_dropped;
1869                 rx_nohandler    += p->rx_nohandler;
1870         }
1871         stats->rx_dropped       = rx_dropped;
1872         stats->tx_dropped       = tx_dropped;
1873         stats->rx_nohandler     = rx_nohandler;
1874 }
1875
1876 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1877 {
1878         struct team *team = netdev_priv(dev);
1879         struct team_port *port;
1880         int err;
1881
1882         /*
1883          * Alhough this is reader, it's guarded by team lock. It's not possible
1884          * to traverse list in reverse under rcu_read_lock
1885          */
1886         mutex_lock(&team->lock);
1887         list_for_each_entry(port, &team->port_list, list) {
1888                 err = vlan_vid_add(port->dev, proto, vid);
1889                 if (err)
1890                         goto unwind;
1891         }
1892         mutex_unlock(&team->lock);
1893
1894         return 0;
1895
1896 unwind:
1897         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1898                 vlan_vid_del(port->dev, proto, vid);
1899         mutex_unlock(&team->lock);
1900
1901         return err;
1902 }
1903
1904 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1905 {
1906         struct team *team = netdev_priv(dev);
1907         struct team_port *port;
1908
1909         mutex_lock(&team->lock);
1910         list_for_each_entry(port, &team->port_list, list)
1911                 vlan_vid_del(port->dev, proto, vid);
1912         mutex_unlock(&team->lock);
1913
1914         return 0;
1915 }
1916
1917 #ifdef CONFIG_NET_POLL_CONTROLLER
1918 static void team_poll_controller(struct net_device *dev)
1919 {
1920 }
1921
1922 static void __team_netpoll_cleanup(struct team *team)
1923 {
1924         struct team_port *port;
1925
1926         list_for_each_entry(port, &team->port_list, list)
1927                 team_port_disable_netpoll(port);
1928 }
1929
1930 static void team_netpoll_cleanup(struct net_device *dev)
1931 {
1932         struct team *team = netdev_priv(dev);
1933
1934         mutex_lock(&team->lock);
1935         __team_netpoll_cleanup(team);
1936         mutex_unlock(&team->lock);
1937 }
1938
1939 static int team_netpoll_setup(struct net_device *dev,
1940                               struct netpoll_info *npifo)
1941 {
1942         struct team *team = netdev_priv(dev);
1943         struct team_port *port;
1944         int err = 0;
1945
1946         mutex_lock(&team->lock);
1947         list_for_each_entry(port, &team->port_list, list) {
1948                 err = __team_port_enable_netpoll(port);
1949                 if (err) {
1950                         __team_netpoll_cleanup(team);
1951                         break;
1952                 }
1953         }
1954         mutex_unlock(&team->lock);
1955         return err;
1956 }
1957 #endif
1958
1959 static int team_add_slave(struct net_device *dev, struct net_device *port_dev,
1960                           struct netlink_ext_ack *extack)
1961 {
1962         struct team *team = netdev_priv(dev);
1963         int err;
1964
1965         mutex_lock(&team->lock);
1966         err = team_port_add(team, port_dev, extack);
1967         mutex_unlock(&team->lock);
1968
1969         if (!err)
1970                 netdev_change_features(dev);
1971
1972         return err;
1973 }
1974
1975 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1976 {
1977         struct team *team = netdev_priv(dev);
1978         int err;
1979
1980         mutex_lock(&team->lock);
1981         err = team_port_del(team, port_dev);
1982         mutex_unlock(&team->lock);
1983
1984         if (!err)
1985                 netdev_change_features(dev);
1986
1987         return err;
1988 }
1989
1990 static netdev_features_t team_fix_features(struct net_device *dev,
1991                                            netdev_features_t features)
1992 {
1993         struct team_port *port;
1994         struct team *team = netdev_priv(dev);
1995         netdev_features_t mask;
1996
1997         mask = features;
1998         features &= ~NETIF_F_ONE_FOR_ALL;
1999         features |= NETIF_F_ALL_FOR_ALL;
2000
2001         rcu_read_lock();
2002         list_for_each_entry_rcu(port, &team->port_list, list) {
2003                 features = netdev_increment_features(features,
2004                                                      port->dev->features,
2005                                                      mask);
2006         }
2007         rcu_read_unlock();
2008
2009         features = netdev_add_tso_features(features, mask);
2010
2011         return features;
2012 }
2013
2014 static int team_change_carrier(struct net_device *dev, bool new_carrier)
2015 {
2016         struct team *team = netdev_priv(dev);
2017
2018         team->user_carrier_enabled = true;
2019
2020         if (new_carrier)
2021                 netif_carrier_on(dev);
2022         else
2023                 netif_carrier_off(dev);
2024         return 0;
2025 }
2026
2027 static const struct net_device_ops team_netdev_ops = {
2028         .ndo_init               = team_init,
2029         .ndo_uninit             = team_uninit,
2030         .ndo_open               = team_open,
2031         .ndo_stop               = team_close,
2032         .ndo_start_xmit         = team_xmit,
2033         .ndo_select_queue       = team_select_queue,
2034         .ndo_change_rx_flags    = team_change_rx_flags,
2035         .ndo_set_rx_mode        = team_set_rx_mode,
2036         .ndo_set_mac_address    = team_set_mac_address,
2037         .ndo_change_mtu         = team_change_mtu,
2038         .ndo_get_stats64        = team_get_stats64,
2039         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
2040         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
2041 #ifdef CONFIG_NET_POLL_CONTROLLER
2042         .ndo_poll_controller    = team_poll_controller,
2043         .ndo_netpoll_setup      = team_netpoll_setup,
2044         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
2045 #endif
2046         .ndo_add_slave          = team_add_slave,
2047         .ndo_del_slave          = team_del_slave,
2048         .ndo_fix_features       = team_fix_features,
2049         .ndo_change_carrier     = team_change_carrier,
2050         .ndo_features_check     = passthru_features_check,
2051 };
2052
2053 /***********************
2054  * ethtool interface
2055  ***********************/
2056
2057 static void team_ethtool_get_drvinfo(struct net_device *dev,
2058                                      struct ethtool_drvinfo *drvinfo)
2059 {
2060         strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2061         strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2062 }
2063
2064 static const struct ethtool_ops team_ethtool_ops = {
2065         .get_drvinfo            = team_ethtool_get_drvinfo,
2066         .get_link               = ethtool_op_get_link,
2067 };
2068
2069 /***********************
2070  * rt netlink interface
2071  ***********************/
2072
2073 static void team_setup_by_port(struct net_device *dev,
2074                                struct net_device *port_dev)
2075 {
2076         dev->header_ops = port_dev->header_ops;
2077         dev->type = port_dev->type;
2078         dev->hard_header_len = port_dev->hard_header_len;
2079         dev->addr_len = port_dev->addr_len;
2080         dev->mtu = port_dev->mtu;
2081         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2082         eth_hw_addr_inherit(dev, port_dev);
2083 }
2084
2085 static int team_dev_type_check_change(struct net_device *dev,
2086                                       struct net_device *port_dev)
2087 {
2088         struct team *team = netdev_priv(dev);
2089         char *portname = port_dev->name;
2090         int err;
2091
2092         if (dev->type == port_dev->type)
2093                 return 0;
2094         if (!list_empty(&team->port_list)) {
2095                 netdev_err(dev, "Device %s is of different type\n", portname);
2096                 return -EBUSY;
2097         }
2098         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2099         err = notifier_to_errno(err);
2100         if (err) {
2101                 netdev_err(dev, "Refused to change device type\n");
2102                 return err;
2103         }
2104         dev_uc_flush(dev);
2105         dev_mc_flush(dev);
2106         team_setup_by_port(dev, port_dev);
2107         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2108         return 0;
2109 }
2110
2111 static void team_setup(struct net_device *dev)
2112 {
2113         ether_setup(dev);
2114         dev->max_mtu = ETH_MAX_MTU;
2115
2116         dev->netdev_ops = &team_netdev_ops;
2117         dev->ethtool_ops = &team_ethtool_ops;
2118         dev->needs_free_netdev = true;
2119         dev->priv_destructor = team_destructor;
2120         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2121         dev->priv_flags |= IFF_NO_QUEUE;
2122         dev->priv_flags |= IFF_TEAM;
2123
2124         /*
2125          * Indicate we support unicast address filtering. That way core won't
2126          * bring us to promisc mode in case a unicast addr is added.
2127          * Let this up to underlay drivers.
2128          */
2129         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2130
2131         dev->features |= NETIF_F_LLTX;
2132         dev->features |= NETIF_F_GRO;
2133
2134         /* Don't allow team devices to change network namespaces. */
2135         dev->features |= NETIF_F_NETNS_LOCAL;
2136
2137         dev->hw_features = TEAM_VLAN_FEATURES |
2138                            NETIF_F_HW_VLAN_CTAG_TX |
2139                            NETIF_F_HW_VLAN_CTAG_RX |
2140                            NETIF_F_HW_VLAN_CTAG_FILTER;
2141
2142         dev->hw_features |= NETIF_F_GSO_ENCAP_ALL | NETIF_F_GSO_UDP_L4;
2143         dev->features |= dev->hw_features;
2144 }
2145
2146 static int team_newlink(struct net *src_net, struct net_device *dev,
2147                         struct nlattr *tb[], struct nlattr *data[],
2148                         struct netlink_ext_ack *extack)
2149 {
2150         if (tb[IFLA_ADDRESS] == NULL)
2151                 eth_hw_addr_random(dev);
2152
2153         return register_netdevice(dev);
2154 }
2155
2156 static int team_validate(struct nlattr *tb[], struct nlattr *data[],
2157                          struct netlink_ext_ack *extack)
2158 {
2159         if (tb[IFLA_ADDRESS]) {
2160                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2161                         return -EINVAL;
2162                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2163                         return -EADDRNOTAVAIL;
2164         }
2165         return 0;
2166 }
2167
2168 static unsigned int team_get_num_tx_queues(void)
2169 {
2170         return TEAM_DEFAULT_NUM_TX_QUEUES;
2171 }
2172
2173 static unsigned int team_get_num_rx_queues(void)
2174 {
2175         return TEAM_DEFAULT_NUM_RX_QUEUES;
2176 }
2177
2178 static struct rtnl_link_ops team_link_ops __read_mostly = {
2179         .kind                   = DRV_NAME,
2180         .priv_size              = sizeof(struct team),
2181         .setup                  = team_setup,
2182         .newlink                = team_newlink,
2183         .validate               = team_validate,
2184         .get_num_tx_queues      = team_get_num_tx_queues,
2185         .get_num_rx_queues      = team_get_num_rx_queues,
2186 };
2187
2188
2189 /***********************************
2190  * Generic netlink custom interface
2191  ***********************************/
2192
2193 static struct genl_family team_nl_family;
2194
2195 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2196         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
2197         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
2198         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
2199         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
2200 };
2201
2202 static const struct nla_policy
2203 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2204         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
2205         [TEAM_ATTR_OPTION_NAME] = {
2206                 .type = NLA_STRING,
2207                 .len = TEAM_STRING_MAX_LEN,
2208         },
2209         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
2210         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
2211         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
2212 };
2213
2214 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2215 {
2216         struct sk_buff *msg;
2217         void *hdr;
2218         int err;
2219
2220         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2221         if (!msg)
2222                 return -ENOMEM;
2223
2224         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2225                           &team_nl_family, 0, TEAM_CMD_NOOP);
2226         if (!hdr) {
2227                 err = -EMSGSIZE;
2228                 goto err_msg_put;
2229         }
2230
2231         genlmsg_end(msg, hdr);
2232
2233         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2234
2235 err_msg_put:
2236         nlmsg_free(msg);
2237
2238         return err;
2239 }
2240
2241 /*
2242  * Netlink cmd functions should be locked by following two functions.
2243  * Since dev gets held here, that ensures dev won't disappear in between.
2244  */
2245 static struct team *team_nl_team_get(struct genl_info *info)
2246 {
2247         struct net *net = genl_info_net(info);
2248         int ifindex;
2249         struct net_device *dev;
2250         struct team *team;
2251
2252         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2253                 return NULL;
2254
2255         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2256         dev = dev_get_by_index(net, ifindex);
2257         if (!dev || dev->netdev_ops != &team_netdev_ops) {
2258                 if (dev)
2259                         dev_put(dev);
2260                 return NULL;
2261         }
2262
2263         team = netdev_priv(dev);
2264         mutex_lock(&team->lock);
2265         return team;
2266 }
2267
2268 static void team_nl_team_put(struct team *team)
2269 {
2270         mutex_unlock(&team->lock);
2271         dev_put(team->dev);
2272 }
2273
2274 typedef int team_nl_send_func_t(struct sk_buff *skb,
2275                                 struct team *team, u32 portid);
2276
2277 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2278 {
2279         return genlmsg_unicast(dev_net(team->dev), skb, portid);
2280 }
2281
2282 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2283                                        struct team_option_inst *opt_inst)
2284 {
2285         struct nlattr *option_item;
2286         struct team_option *option = opt_inst->option;
2287         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2288         struct team_gsetter_ctx ctx;
2289         int err;
2290
2291         ctx.info = opt_inst_info;
2292         err = team_option_get(team, opt_inst, &ctx);
2293         if (err)
2294                 return err;
2295
2296         option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2297         if (!option_item)
2298                 return -EMSGSIZE;
2299
2300         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2301                 goto nest_cancel;
2302         if (opt_inst_info->port &&
2303             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2304                         opt_inst_info->port->dev->ifindex))
2305                 goto nest_cancel;
2306         if (opt_inst->option->array_size &&
2307             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2308                         opt_inst_info->array_index))
2309                 goto nest_cancel;
2310
2311         switch (option->type) {
2312         case TEAM_OPTION_TYPE_U32:
2313                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2314                         goto nest_cancel;
2315                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2316                         goto nest_cancel;
2317                 break;
2318         case TEAM_OPTION_TYPE_STRING:
2319                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2320                         goto nest_cancel;
2321                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2322                                    ctx.data.str_val))
2323                         goto nest_cancel;
2324                 break;
2325         case TEAM_OPTION_TYPE_BINARY:
2326                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2327                         goto nest_cancel;
2328                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2329                             ctx.data.bin_val.ptr))
2330                         goto nest_cancel;
2331                 break;
2332         case TEAM_OPTION_TYPE_BOOL:
2333                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2334                         goto nest_cancel;
2335                 if (ctx.data.bool_val &&
2336                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2337                         goto nest_cancel;
2338                 break;
2339         case TEAM_OPTION_TYPE_S32:
2340                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2341                         goto nest_cancel;
2342                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2343                         goto nest_cancel;
2344                 break;
2345         default:
2346                 BUG();
2347         }
2348         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2349                 goto nest_cancel;
2350         if (opt_inst->changed) {
2351                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2352                         goto nest_cancel;
2353                 opt_inst->changed = false;
2354         }
2355         nla_nest_end(skb, option_item);
2356         return 0;
2357
2358 nest_cancel:
2359         nla_nest_cancel(skb, option_item);
2360         return -EMSGSIZE;
2361 }
2362
2363 static int __send_and_alloc_skb(struct sk_buff **pskb,
2364                                 struct team *team, u32 portid,
2365                                 team_nl_send_func_t *send_func)
2366 {
2367         int err;
2368
2369         if (*pskb) {
2370                 err = send_func(*pskb, team, portid);
2371                 if (err)
2372                         return err;
2373         }
2374         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2375         if (!*pskb)
2376                 return -ENOMEM;
2377         return 0;
2378 }
2379
2380 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2381                                     int flags, team_nl_send_func_t *send_func,
2382                                     struct list_head *sel_opt_inst_list)
2383 {
2384         struct nlattr *option_list;
2385         struct nlmsghdr *nlh;
2386         void *hdr;
2387         struct team_option_inst *opt_inst;
2388         int err;
2389         struct sk_buff *skb = NULL;
2390         bool incomplete;
2391         int i;
2392
2393         opt_inst = list_first_entry(sel_opt_inst_list,
2394                                     struct team_option_inst, tmp_list);
2395
2396 start_again:
2397         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2398         if (err)
2399                 return err;
2400
2401         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2402                           TEAM_CMD_OPTIONS_GET);
2403         if (!hdr) {
2404                 nlmsg_free(skb);
2405                 return -EMSGSIZE;
2406         }
2407
2408         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2409                 goto nla_put_failure;
2410         option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2411         if (!option_list)
2412                 goto nla_put_failure;
2413
2414         i = 0;
2415         incomplete = false;
2416         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2417                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2418                 if (err) {
2419                         if (err == -EMSGSIZE) {
2420                                 if (!i)
2421                                         goto errout;
2422                                 incomplete = true;
2423                                 break;
2424                         }
2425                         goto errout;
2426                 }
2427                 i++;
2428         }
2429
2430         nla_nest_end(skb, option_list);
2431         genlmsg_end(skb, hdr);
2432         if (incomplete)
2433                 goto start_again;
2434
2435 send_done:
2436         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2437         if (!nlh) {
2438                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2439                 if (err)
2440                         return err;
2441                 goto send_done;
2442         }
2443
2444         return send_func(skb, team, portid);
2445
2446 nla_put_failure:
2447         err = -EMSGSIZE;
2448 errout:
2449         nlmsg_free(skb);
2450         return err;
2451 }
2452
2453 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2454 {
2455         struct team *team;
2456         struct team_option_inst *opt_inst;
2457         int err;
2458         LIST_HEAD(sel_opt_inst_list);
2459
2460         team = team_nl_team_get(info);
2461         if (!team)
2462                 return -EINVAL;
2463
2464         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2465                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2466         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2467                                        NLM_F_ACK, team_nl_send_unicast,
2468                                        &sel_opt_inst_list);
2469
2470         team_nl_team_put(team);
2471
2472         return err;
2473 }
2474
2475 static int team_nl_send_event_options_get(struct team *team,
2476                                           struct list_head *sel_opt_inst_list);
2477
2478 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2479 {
2480         struct team *team;
2481         int err = 0;
2482         int i;
2483         struct nlattr *nl_option;
2484
2485         rtnl_lock();
2486
2487         team = team_nl_team_get(info);
2488         if (!team) {
2489                 err = -EINVAL;
2490                 goto rtnl_unlock;
2491         }
2492
2493         err = -EINVAL;
2494         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2495                 err = -EINVAL;
2496                 goto team_put;
2497         }
2498
2499         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2500                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2501                 struct nlattr *attr;
2502                 struct nlattr *attr_data;
2503                 LIST_HEAD(opt_inst_list);
2504                 enum team_option_type opt_type;
2505                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2506                 u32 opt_array_index = 0;
2507                 bool opt_is_array = false;
2508                 struct team_option_inst *opt_inst;
2509                 char *opt_name;
2510                 bool opt_found = false;
2511
2512                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2513                         err = -EINVAL;
2514                         goto team_put;
2515                 }
2516                 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2517                                        nl_option, team_nl_option_policy,
2518                                        info->extack);
2519                 if (err)
2520                         goto team_put;
2521                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2522                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2523                         err = -EINVAL;
2524                         goto team_put;
2525                 }
2526                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2527                 case NLA_U32:
2528                         opt_type = TEAM_OPTION_TYPE_U32;
2529                         break;
2530                 case NLA_STRING:
2531                         opt_type = TEAM_OPTION_TYPE_STRING;
2532                         break;
2533                 case NLA_BINARY:
2534                         opt_type = TEAM_OPTION_TYPE_BINARY;
2535                         break;
2536                 case NLA_FLAG:
2537                         opt_type = TEAM_OPTION_TYPE_BOOL;
2538                         break;
2539                 case NLA_S32:
2540                         opt_type = TEAM_OPTION_TYPE_S32;
2541                         break;
2542                 default:
2543                         goto team_put;
2544                 }
2545
2546                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2547                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2548                         err = -EINVAL;
2549                         goto team_put;
2550                 }
2551
2552                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2553                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2554                 if (attr)
2555                         opt_port_ifindex = nla_get_u32(attr);
2556
2557                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2558                 if (attr) {
2559                         opt_is_array = true;
2560                         opt_array_index = nla_get_u32(attr);
2561                 }
2562
2563                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2564                         struct team_option *option = opt_inst->option;
2565                         struct team_gsetter_ctx ctx;
2566                         struct team_option_inst_info *opt_inst_info;
2567                         int tmp_ifindex;
2568
2569                         opt_inst_info = &opt_inst->info;
2570                         tmp_ifindex = opt_inst_info->port ?
2571                                       opt_inst_info->port->dev->ifindex : 0;
2572                         if (option->type != opt_type ||
2573                             strcmp(option->name, opt_name) ||
2574                             tmp_ifindex != opt_port_ifindex ||
2575                             (option->array_size && !opt_is_array) ||
2576                             opt_inst_info->array_index != opt_array_index)
2577                                 continue;
2578                         opt_found = true;
2579                         ctx.info = opt_inst_info;
2580                         switch (opt_type) {
2581                         case TEAM_OPTION_TYPE_U32:
2582                                 ctx.data.u32_val = nla_get_u32(attr_data);
2583                                 break;
2584                         case TEAM_OPTION_TYPE_STRING:
2585                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2586                                         err = -EINVAL;
2587                                         goto team_put;
2588                                 }
2589                                 ctx.data.str_val = nla_data(attr_data);
2590                                 break;
2591                         case TEAM_OPTION_TYPE_BINARY:
2592                                 ctx.data.bin_val.len = nla_len(attr_data);
2593                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2594                                 break;
2595                         case TEAM_OPTION_TYPE_BOOL:
2596                                 ctx.data.bool_val = attr_data ? true : false;
2597                                 break;
2598                         case TEAM_OPTION_TYPE_S32:
2599                                 ctx.data.s32_val = nla_get_s32(attr_data);
2600                                 break;
2601                         default:
2602                                 BUG();
2603                         }
2604                         err = team_option_set(team, opt_inst, &ctx);
2605                         if (err)
2606                                 goto team_put;
2607                         opt_inst->changed = true;
2608                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2609                 }
2610                 if (!opt_found) {
2611                         err = -ENOENT;
2612                         goto team_put;
2613                 }
2614
2615                 err = team_nl_send_event_options_get(team, &opt_inst_list);
2616                 if (err)
2617                         break;
2618         }
2619
2620 team_put:
2621         team_nl_team_put(team);
2622 rtnl_unlock:
2623         rtnl_unlock();
2624         return err;
2625 }
2626
2627 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2628                                      struct team_port *port)
2629 {
2630         struct nlattr *port_item;
2631
2632         port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2633         if (!port_item)
2634                 goto nest_cancel;
2635         if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2636                 goto nest_cancel;
2637         if (port->changed) {
2638                 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2639                         goto nest_cancel;
2640                 port->changed = false;
2641         }
2642         if ((port->removed &&
2643              nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2644             (port->state.linkup &&
2645              nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2646             nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2647             nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2648                 goto nest_cancel;
2649         nla_nest_end(skb, port_item);
2650         return 0;
2651
2652 nest_cancel:
2653         nla_nest_cancel(skb, port_item);
2654         return -EMSGSIZE;
2655 }
2656
2657 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2658                                       int flags, team_nl_send_func_t *send_func,
2659                                       struct team_port *one_port)
2660 {
2661         struct nlattr *port_list;
2662         struct nlmsghdr *nlh;
2663         void *hdr;
2664         struct team_port *port;
2665         int err;
2666         struct sk_buff *skb = NULL;
2667         bool incomplete;
2668         int i;
2669
2670         port = list_first_entry_or_null(&team->port_list,
2671                                         struct team_port, list);
2672
2673 start_again:
2674         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2675         if (err)
2676                 return err;
2677
2678         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2679                           TEAM_CMD_PORT_LIST_GET);
2680         if (!hdr) {
2681                 nlmsg_free(skb);
2682                 return -EMSGSIZE;
2683         }
2684
2685         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2686                 goto nla_put_failure;
2687         port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2688         if (!port_list)
2689                 goto nla_put_failure;
2690
2691         i = 0;
2692         incomplete = false;
2693
2694         /* If one port is selected, called wants to send port list containing
2695          * only this port. Otherwise go through all listed ports and send all
2696          */
2697         if (one_port) {
2698                 err = team_nl_fill_one_port_get(skb, one_port);
2699                 if (err)
2700                         goto errout;
2701         } else if (port) {
2702                 list_for_each_entry_from(port, &team->port_list, list) {
2703                         err = team_nl_fill_one_port_get(skb, port);
2704                         if (err) {
2705                                 if (err == -EMSGSIZE) {
2706                                         if (!i)
2707                                                 goto errout;
2708                                         incomplete = true;
2709                                         break;
2710                                 }
2711                                 goto errout;
2712                         }
2713                         i++;
2714                 }
2715         }
2716
2717         nla_nest_end(skb, port_list);
2718         genlmsg_end(skb, hdr);
2719         if (incomplete)
2720                 goto start_again;
2721
2722 send_done:
2723         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2724         if (!nlh) {
2725                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2726                 if (err)
2727                         return err;
2728                 goto send_done;
2729         }
2730
2731         return send_func(skb, team, portid);
2732
2733 nla_put_failure:
2734         err = -EMSGSIZE;
2735 errout:
2736         nlmsg_free(skb);
2737         return err;
2738 }
2739
2740 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2741                                      struct genl_info *info)
2742 {
2743         struct team *team;
2744         int err;
2745
2746         team = team_nl_team_get(info);
2747         if (!team)
2748                 return -EINVAL;
2749
2750         err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2751                                          NLM_F_ACK, team_nl_send_unicast, NULL);
2752
2753         team_nl_team_put(team);
2754
2755         return err;
2756 }
2757
2758 static const struct genl_ops team_nl_ops[] = {
2759         {
2760                 .cmd = TEAM_CMD_NOOP,
2761                 .doit = team_nl_cmd_noop,
2762                 .policy = team_nl_policy,
2763         },
2764         {
2765                 .cmd = TEAM_CMD_OPTIONS_SET,
2766                 .doit = team_nl_cmd_options_set,
2767                 .policy = team_nl_policy,
2768                 .flags = GENL_ADMIN_PERM,
2769         },
2770         {
2771                 .cmd = TEAM_CMD_OPTIONS_GET,
2772                 .doit = team_nl_cmd_options_get,
2773                 .policy = team_nl_policy,
2774                 .flags = GENL_ADMIN_PERM,
2775         },
2776         {
2777                 .cmd = TEAM_CMD_PORT_LIST_GET,
2778                 .doit = team_nl_cmd_port_list_get,
2779                 .policy = team_nl_policy,
2780                 .flags = GENL_ADMIN_PERM,
2781         },
2782 };
2783
2784 static const struct genl_multicast_group team_nl_mcgrps[] = {
2785         { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2786 };
2787
2788 static struct genl_family team_nl_family __ro_after_init = {
2789         .name           = TEAM_GENL_NAME,
2790         .version        = TEAM_GENL_VERSION,
2791         .maxattr        = TEAM_ATTR_MAX,
2792         .netnsok        = true,
2793         .module         = THIS_MODULE,
2794         .ops            = team_nl_ops,
2795         .n_ops          = ARRAY_SIZE(team_nl_ops),
2796         .mcgrps         = team_nl_mcgrps,
2797         .n_mcgrps       = ARRAY_SIZE(team_nl_mcgrps),
2798 };
2799
2800 static int team_nl_send_multicast(struct sk_buff *skb,
2801                                   struct team *team, u32 portid)
2802 {
2803         return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2804                                        skb, 0, 0, GFP_KERNEL);
2805 }
2806
2807 static int team_nl_send_event_options_get(struct team *team,
2808                                           struct list_head *sel_opt_inst_list)
2809 {
2810         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2811                                         sel_opt_inst_list);
2812 }
2813
2814 static int team_nl_send_event_port_get(struct team *team,
2815                                        struct team_port *port)
2816 {
2817         return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2818                                           port);
2819 }
2820
2821 static int __init team_nl_init(void)
2822 {
2823         return genl_register_family(&team_nl_family);
2824 }
2825
2826 static void team_nl_fini(void)
2827 {
2828         genl_unregister_family(&team_nl_family);
2829 }
2830
2831
2832 /******************
2833  * Change checkers
2834  ******************/
2835
2836 static void __team_options_change_check(struct team *team)
2837 {
2838         int err;
2839         struct team_option_inst *opt_inst;
2840         LIST_HEAD(sel_opt_inst_list);
2841
2842         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2843                 if (opt_inst->changed)
2844                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2845         }
2846         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2847         if (err && err != -ESRCH)
2848                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2849                             err);
2850 }
2851
2852 /* rtnl lock is held */
2853
2854 static void __team_port_change_send(struct team_port *port, bool linkup)
2855 {
2856         int err;
2857
2858         port->changed = true;
2859         port->state.linkup = linkup;
2860         team_refresh_port_linkup(port);
2861         if (linkup) {
2862                 struct ethtool_link_ksettings ecmd;
2863
2864                 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2865                 if (!err) {
2866                         port->state.speed = ecmd.base.speed;
2867                         port->state.duplex = ecmd.base.duplex;
2868                         goto send_event;
2869                 }
2870         }
2871         port->state.speed = 0;
2872         port->state.duplex = 0;
2873
2874 send_event:
2875         err = team_nl_send_event_port_get(port->team, port);
2876         if (err && err != -ESRCH)
2877                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2878                             port->dev->name, err);
2879
2880 }
2881
2882 static void __team_carrier_check(struct team *team)
2883 {
2884         struct team_port *port;
2885         bool team_linkup;
2886
2887         if (team->user_carrier_enabled)
2888                 return;
2889
2890         team_linkup = false;
2891         list_for_each_entry(port, &team->port_list, list) {
2892                 if (port->linkup) {
2893                         team_linkup = true;
2894                         break;
2895                 }
2896         }
2897
2898         if (team_linkup)
2899                 netif_carrier_on(team->dev);
2900         else
2901                 netif_carrier_off(team->dev);
2902 }
2903
2904 static void __team_port_change_check(struct team_port *port, bool linkup)
2905 {
2906         if (port->state.linkup != linkup)
2907                 __team_port_change_send(port, linkup);
2908         __team_carrier_check(port->team);
2909 }
2910
2911 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2912 {
2913         __team_port_change_send(port, linkup);
2914         __team_carrier_check(port->team);
2915 }
2916
2917 static void __team_port_change_port_removed(struct team_port *port)
2918 {
2919         port->removed = true;
2920         __team_port_change_send(port, false);
2921         __team_carrier_check(port->team);
2922 }
2923
2924 static void team_port_change_check(struct team_port *port, bool linkup)
2925 {
2926         struct team *team = port->team;
2927
2928         mutex_lock(&team->lock);
2929         __team_port_change_check(port, linkup);
2930         mutex_unlock(&team->lock);
2931 }
2932
2933
2934 /************************************
2935  * Net device notifier event handler
2936  ************************************/
2937
2938 static int team_device_event(struct notifier_block *unused,
2939                              unsigned long event, void *ptr)
2940 {
2941         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2942         struct team_port *port;
2943
2944         port = team_port_get_rtnl(dev);
2945         if (!port)
2946                 return NOTIFY_DONE;
2947
2948         switch (event) {
2949         case NETDEV_UP:
2950                 if (netif_oper_up(dev))
2951                         team_port_change_check(port, true);
2952                 break;
2953         case NETDEV_DOWN:
2954                 team_port_change_check(port, false);
2955                 break;
2956         case NETDEV_CHANGE:
2957                 if (netif_running(port->dev))
2958                         team_port_change_check(port,
2959                                                !!netif_oper_up(port->dev));
2960                 break;
2961         case NETDEV_UNREGISTER:
2962                 team_del_slave(port->team->dev, dev);
2963                 break;
2964         case NETDEV_FEAT_CHANGE:
2965                 team_compute_features(port->team);
2966                 break;
2967         case NETDEV_PRECHANGEMTU:
2968                 /* Forbid to change mtu of underlaying device */
2969                 if (!port->team->port_mtu_change_allowed)
2970                         return NOTIFY_BAD;
2971                 break;
2972         case NETDEV_PRE_TYPE_CHANGE:
2973                 /* Forbid to change type of underlaying device */
2974                 return NOTIFY_BAD;
2975         case NETDEV_RESEND_IGMP:
2976                 /* Propagate to master device */
2977                 call_netdevice_notifiers(event, port->team->dev);
2978                 break;
2979         }
2980         return NOTIFY_DONE;
2981 }
2982
2983 static struct notifier_block team_notifier_block __read_mostly = {
2984         .notifier_call = team_device_event,
2985 };
2986
2987
2988 /***********************
2989  * Module init and exit
2990  ***********************/
2991
2992 static int __init team_module_init(void)
2993 {
2994         int err;
2995
2996         register_netdevice_notifier(&team_notifier_block);
2997
2998         err = rtnl_link_register(&team_link_ops);
2999         if (err)
3000                 goto err_rtnl_reg;
3001
3002         err = team_nl_init();
3003         if (err)
3004                 goto err_nl_init;
3005
3006         return 0;
3007
3008 err_nl_init:
3009         rtnl_link_unregister(&team_link_ops);
3010
3011 err_rtnl_reg:
3012         unregister_netdevice_notifier(&team_notifier_block);
3013
3014         return err;
3015 }
3016
3017 static void __exit team_module_exit(void)
3018 {
3019         team_nl_fini();
3020         rtnl_link_unregister(&team_link_ops);
3021         unregister_netdevice_notifier(&team_notifier_block);
3022 }
3023
3024 module_init(team_module_init);
3025 module_exit(team_module_exit);
3026
3027 MODULE_LICENSE("GPL v2");
3028 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
3029 MODULE_DESCRIPTION("Ethernet team device driver");
3030 MODULE_ALIAS_RTNL_LINK(DRV_NAME);