drivers/net/team/team_core.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * drivers/net/team/team.c - Network team device driver
   4  * Copyright (c) 2011 Jiri Pirko <[email protected]>
   5  */
   6
   7 #include <linux/ethtool.h>
   8 #include <linux/kernel.h>
   9 #include <linux/types.h>
  10 #include <linux/module.h>
  11 #include <linux/init.h>
  12 #include <linux/slab.h>
  13 #include <linux/rcupdate.h>
  14 #include <linux/errno.h>
  15 #include <linux/ctype.h>
  16 #include <linux/notifier.h>
  17 #include <linux/netdevice.h>
  18 #include <linux/netpoll.h>
  19 #include <linux/if_vlan.h>
  20 #include <linux/if_arp.h>
  21 #include <linux/socket.h>
  22 #include <linux/etherdevice.h>
  23 #include <linux/rtnetlink.h>
  24 #include <net/rtnetlink.h>
  25 #include <net/genetlink.h>
  26 #include <net/netlink.h>
  27 #include <net/sch_generic.h>
  28 #include <linux/if_team.h>
  29
  30 #include "team_nl.h"
  31
  32 #define DRV_NAME "team"
  33
  34
  35 /**********
  36  * Helpers
  37  **********/
  38
  39 static struct team_port *team_port_get_rtnl(const struct net_device *dev)
  40 {
  41         struct team_port *port = rtnl_dereference(dev->rx_handler_data);
  42
  43         return netif_is_team_port(dev) ? port : NULL;
  44 }
  45
  46 /*
  47  * Since the ability to change device address for open port device is tested in
  48  * team_port_add, this function can be called without control of return value
  49  */
  50 static int __set_port_dev_addr(struct net_device *port_dev,
  51                                const unsigned char *dev_addr)
  52 {
  53         struct sockaddr_storage addr;
  54
  55         memcpy(addr.__data, dev_addr, port_dev->addr_len);
  56         addr.ss_family = port_dev->type;
  57         return dev_set_mac_address(port_dev, (struct sockaddr *)&addr, NULL);
  58 }
  59
  60 static int team_port_set_orig_dev_addr(struct team_port *port)
  61 {
  62         return __set_port_dev_addr(port->dev, port->orig.dev_addr);
  63 }
  64
  65 static int team_port_set_team_dev_addr(struct team *team,
  66                                        struct team_port *port)
  67 {
  68         return __set_port_dev_addr(port->dev, team->dev->dev_addr);
  69 }
  70
  71 int team_modeop_port_enter(struct team *team, struct team_port *port)
  72 {
  73         return team_port_set_team_dev_addr(team, port);
  74 }
  75 EXPORT_SYMBOL(team_modeop_port_enter);
  76
  77 void team_modeop_port_change_dev_addr(struct team *team,
  78                                       struct team_port *port)
  79 {
  80         team_port_set_team_dev_addr(team, port);
  81 }
  82 EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
  83
  84 static void team_lower_state_changed(struct team_port *port)
  85 {
  86         struct netdev_lag_lower_state_info info;
  87
  88         info.link_up = port->linkup;
  89         info.tx_enabled = team_port_enabled(port);
  90         netdev_lower_state_changed(port->dev, &info);
  91 }
  92
  93 static void team_refresh_port_linkup(struct team_port *port)
  94 {
  95         bool new_linkup = port->user.linkup_enabled ? port->user.linkup :
  96                                                       port->state.linkup;
  97
  98         if (port->linkup != new_linkup) {
  99                 port->linkup = new_linkup;
 100                 team_lower_state_changed(port);
 101         }
 102 }
 103
 104
 105 /*******************
 106  * Options handling
 107  *******************/
 108
 109 struct team_option_inst { /* One for each option instance */
 110         struct list_head list;
 111         struct list_head tmp_list;
 112         struct team_option *option;
 113         struct team_option_inst_info info;
 114         bool changed;
 115         bool removed;
 116 };
 117
 118 static struct team_option *__team_find_option(struct team *team,
 119                                               const char *opt_name)
 120 {
 121         struct team_option *option;
 122
 123         list_for_each_entry(option, &team->option_list, list) {
 124                 if (strcmp(option->name, opt_name) == 0)
 125                         return option;
 126         }
 127         return NULL;
 128 }
 129
 130 static void __team_option_inst_del(struct team_option_inst *opt_inst)
 131 {
 132         list_del(&opt_inst->list);
 133         kfree(opt_inst);
 134 }
 135
 136 static void __team_option_inst_del_option(struct team *team,
 137                                           struct team_option *option)
 138 {
 139         struct team_option_inst *opt_inst, *tmp;
 140
 141         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 142                 if (opt_inst->option == option)
 143                         __team_option_inst_del(opt_inst);
 144         }
 145 }
 146
 147 static int __team_option_inst_add(struct team *team, struct team_option *option,
 148                                   struct team_port *port)
 149 {
 150         struct team_option_inst *opt_inst;
 151         unsigned int array_size;
 152         unsigned int i;
 153
 154         array_size = option->array_size;
 155         if (!array_size)
 156                 array_size = 1; /* No array but still need one instance */
 157
 158         for (i = 0; i < array_size; i++) {
 159                 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
 160                 if (!opt_inst)
 161                         return -ENOMEM;
 162                 opt_inst->option = option;
 163                 opt_inst->info.port = port;
 164                 opt_inst->info.array_index = i;
 165                 opt_inst->changed = true;
 166                 opt_inst->removed = false;
 167                 list_add_tail(&opt_inst->list, &team->option_inst_list);
 168                 if (option->init)
 169                         option->init(team, &opt_inst->info);
 170
 171         }
 172         return 0;
 173 }
 174
 175 static int __team_option_inst_add_option(struct team *team,
 176                                          struct team_option *option)
 177 {
 178         int err;
 179
 180         if (!option->per_port) {
 181                 err = __team_option_inst_add(team, option, NULL);
 182                 if (err)
 183                         goto inst_del_option;
 184         }
 185         return 0;
 186
 187 inst_del_option:
 188         __team_option_inst_del_option(team, option);
 189         return err;
 190 }
 191
 192 static void __team_option_inst_mark_removed_option(struct team *team,
 193                                                    struct team_option *option)
 194 {
 195         struct team_option_inst *opt_inst;
 196
 197         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 198                 if (opt_inst->option == option) {
 199                         opt_inst->changed = true;
 200                         opt_inst->removed = true;
 201                 }
 202         }
 203 }
 204
 205 static void __team_option_inst_del_port(struct team *team,
 206                                         struct team_port *port)
 207 {
 208         struct team_option_inst *opt_inst, *tmp;
 209
 210         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 211                 if (opt_inst->option->per_port &&
 212                     opt_inst->info.port == port)
 213                         __team_option_inst_del(opt_inst);
 214         }
 215 }
 216
 217 static int __team_option_inst_add_port(struct team *team,
 218                                        struct team_port *port)
 219 {
 220         struct team_option *option;
 221         int err;
 222
 223         list_for_each_entry(option, &team->option_list, list) {
 224                 if (!option->per_port)
 225                         continue;
 226                 err = __team_option_inst_add(team, option, port);
 227                 if (err)
 228                         goto inst_del_port;
 229         }
 230         return 0;
 231
 232 inst_del_port:
 233         __team_option_inst_del_port(team, port);
 234         return err;
 235 }
 236
 237 static void __team_option_inst_mark_removed_port(struct team *team,
 238                                                  struct team_port *port)
 239 {
 240         struct team_option_inst *opt_inst;
 241
 242         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 243                 if (opt_inst->info.port == port) {
 244                         opt_inst->changed = true;
 245                         opt_inst->removed = true;
 246                 }
 247         }
 248 }
 249
 250 static int __team_options_register(struct team *team,
 251                                    const struct team_option *option,
 252                                    size_t option_count)
 253 {
 254         int i;
 255         struct team_option **dst_opts;
 256         int err;
 257
 258         dst_opts = kcalloc(option_count, sizeof(struct team_option *),
 259                            GFP_KERNEL);
 260         if (!dst_opts)
 261                 return -ENOMEM;
 262         for (i = 0; i < option_count; i++, option++) {
 263                 if (__team_find_option(team, option->name)) {
 264                         err = -EEXIST;
 265                         goto alloc_rollback;
 266                 }
 267                 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
 268                 if (!dst_opts[i]) {
 269                         err = -ENOMEM;
 270                         goto alloc_rollback;
 271                 }
 272         }
 273
 274         for (i = 0; i < option_count; i++) {
 275                 err = __team_option_inst_add_option(team, dst_opts[i]);
 276                 if (err)
 277                         goto inst_rollback;
 278                 list_add_tail(&dst_opts[i]->list, &team->option_list);
 279         }
 280
 281         kfree(dst_opts);
 282         return 0;
 283
 284 inst_rollback:
 285         for (i--; i >= 0; i--) {
 286                 __team_option_inst_del_option(team, dst_opts[i]);
 287                 list_del(&dst_opts[i]->list);
 288         }
 289
 290         i = option_count;
 291 alloc_rollback:
 292         for (i--; i >= 0; i--)
 293                 kfree(dst_opts[i]);
 294
 295         kfree(dst_opts);
 296         return err;
 297 }
 298
 299 static void __team_options_mark_removed(struct team *team,
 300                                         const struct team_option *option,
 301                                         size_t option_count)
 302 {
 303         int i;
 304
 305         for (i = 0; i < option_count; i++, option++) {
 306                 struct team_option *del_opt;
 307
 308                 del_opt = __team_find_option(team, option->name);
 309                 if (del_opt)
 310                         __team_option_inst_mark_removed_option(team, del_opt);
 311         }
 312 }
 313
 314 static void __team_options_unregister(struct team *team,
 315                                       const struct team_option *option,
 316                                       size_t option_count)
 317 {
 318         int i;
 319
 320         for (i = 0; i < option_count; i++, option++) {
 321                 struct team_option *del_opt;
 322
 323                 del_opt = __team_find_option(team, option->name);
 324                 if (del_opt) {
 325                         __team_option_inst_del_option(team, del_opt);
 326                         list_del(&del_opt->list);
 327                         kfree(del_opt);
 328                 }
 329         }
 330 }
 331
 332 static void __team_options_change_check(struct team *team);
 333
 334 int team_options_register(struct team *team,
 335                           const struct team_option *option,
 336                           size_t option_count)
 337 {
 338         int err;
 339
 340         err = __team_options_register(team, option, option_count);
 341         if (err)
 342                 return err;
 343         __team_options_change_check(team);
 344         return 0;
 345 }
 346 EXPORT_SYMBOL(team_options_register);
 347
 348 void team_options_unregister(struct team *team,
 349                              const struct team_option *option,
 350                              size_t option_count)
 351 {
 352         __team_options_mark_removed(team, option, option_count);
 353         __team_options_change_check(team);
 354         __team_options_unregister(team, option, option_count);
 355 }
 356 EXPORT_SYMBOL(team_options_unregister);
 357
 358 static int team_option_get(struct team *team,
 359                            struct team_option_inst *opt_inst,
 360                            struct team_gsetter_ctx *ctx)
 361 {
 362         if (!opt_inst->option->getter)
 363                 return -EOPNOTSUPP;
 364
 365         opt_inst->option->getter(team, ctx);
 366         return 0;
 367 }
 368
 369 static int team_option_set(struct team *team,
 370                            struct team_option_inst *opt_inst,
 371                            struct team_gsetter_ctx *ctx)
 372 {
 373         if (!opt_inst->option->setter)
 374                 return -EOPNOTSUPP;
 375         return opt_inst->option->setter(team, ctx);
 376 }
 377
 378 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
 379 {
 380         struct team_option_inst *opt_inst;
 381
 382         opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
 383         opt_inst->changed = true;
 384 }
 385 EXPORT_SYMBOL(team_option_inst_set_change);
 386
 387 void team_options_change_check(struct team *team)
 388 {
 389         __team_options_change_check(team);
 390 }
 391 EXPORT_SYMBOL(team_options_change_check);
 392
 393
 394 /****************
 395  * Mode handling
 396  ****************/
 397
 398 static LIST_HEAD(mode_list);
 399 static DEFINE_SPINLOCK(mode_list_lock);
 400
 401 struct team_mode_item {
 402         struct list_head list;
 403         const struct team_mode *mode;
 404 };
 405
 406 static struct team_mode_item *__find_mode(const char *kind)
 407 {
 408         struct team_mode_item *mitem;
 409
 410         list_for_each_entry(mitem, &mode_list, list) {
 411                 if (strcmp(mitem->mode->kind, kind) == 0)
 412                         return mitem;
 413         }
 414         return NULL;
 415 }
 416
 417 static bool is_good_mode_name(const char *name)
 418 {
 419         while (*name != '\0') {
 420                 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
 421                         return false;
 422                 name++;
 423         }
 424         return true;
 425 }
 426
 427 int team_mode_register(const struct team_mode *mode)
 428 {
 429         int err = 0;
 430         struct team_mode_item *mitem;
 431
 432         if (!is_good_mode_name(mode->kind) ||
 433             mode->priv_size > TEAM_MODE_PRIV_SIZE)
 434                 return -EINVAL;
 435
 436         mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
 437         if (!mitem)
 438                 return -ENOMEM;
 439
 440         spin_lock(&mode_list_lock);
 441         if (__find_mode(mode->kind)) {
 442                 err = -EEXIST;
 443                 kfree(mitem);
 444                 goto unlock;
 445         }
 446         mitem->mode = mode;
 447         list_add_tail(&mitem->list, &mode_list);
 448 unlock:
 449         spin_unlock(&mode_list_lock);
 450         return err;
 451 }
 452 EXPORT_SYMBOL(team_mode_register);
 453
 454 void team_mode_unregister(const struct team_mode *mode)
 455 {
 456         struct team_mode_item *mitem;
 457
 458         spin_lock(&mode_list_lock);
 459         mitem = __find_mode(mode->kind);
 460         if (mitem) {
 461                 list_del_init(&mitem->list);
 462                 kfree(mitem);
 463         }
 464         spin_unlock(&mode_list_lock);
 465 }
 466 EXPORT_SYMBOL(team_mode_unregister);
 467
 468 static const struct team_mode *team_mode_get(const char *kind)
 469 {
 470         struct team_mode_item *mitem;
 471         const struct team_mode *mode = NULL;
 472
 473         if (!try_module_get(THIS_MODULE))
 474                 return NULL;
 475
 476         spin_lock(&mode_list_lock);
 477         mitem = __find_mode(kind);
 478         if (!mitem) {
 479                 spin_unlock(&mode_list_lock);
 480                 request_module("team-mode-%s", kind);
 481                 spin_lock(&mode_list_lock);
 482                 mitem = __find_mode(kind);
 483         }
 484         if (mitem) {
 485                 mode = mitem->mode;
 486                 if (!try_module_get(mode->owner))
 487                         mode = NULL;
 488         }
 489
 490         spin_unlock(&mode_list_lock);
 491         module_put(THIS_MODULE);
 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                 if (is_link_local_ether_addr(eth_hdr(skb)->h_dest))
 739                         /* link-local packets are mostly useful when stack receives them
 740                          * with the link they arrive on.
 741                          */
 742                         return RX_HANDLER_PASS;
 743                 /* allow exact match delivery for disabled ports */
 744                 res = RX_HANDLER_EXACT;
 745         } else {
 746                 res = team->ops.receive(team, port, skb);
 747         }
 748         if (res == RX_HANDLER_ANOTHER) {
 749                 struct team_pcpu_stats *pcpu_stats;
 750
 751                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
 752                 u64_stats_update_begin(&pcpu_stats->syncp);
 753                 u64_stats_inc(&pcpu_stats->rx_packets);
 754                 u64_stats_add(&pcpu_stats->rx_bytes, skb->len);
 755                 if (skb->pkt_type == PACKET_MULTICAST)
 756                         u64_stats_inc(&pcpu_stats->rx_multicast);
 757                 u64_stats_update_end(&pcpu_stats->syncp);
 758
 759                 skb->dev = team->dev;
 760         } else if (res == RX_HANDLER_EXACT) {
 761                 this_cpu_inc(team->pcpu_stats->rx_nohandler);
 762         } else {
 763                 this_cpu_inc(team->pcpu_stats->rx_dropped);
 764         }
 765
 766         return res;
 767 }
 768
 769
 770 /*************************************
 771  * Multiqueue Tx port select override
 772  *************************************/
 773
 774 static int team_queue_override_init(struct team *team)
 775 {
 776         struct list_head *listarr;
 777         unsigned int queue_cnt = team->dev->num_tx_queues - 1;
 778         unsigned int i;
 779
 780         if (!queue_cnt)
 781                 return 0;
 782         listarr = kmalloc_array(queue_cnt, sizeof(struct list_head),
 783                                 GFP_KERNEL);
 784         if (!listarr)
 785                 return -ENOMEM;
 786         team->qom_lists = listarr;
 787         for (i = 0; i < queue_cnt; i++)
 788                 INIT_LIST_HEAD(listarr++);
 789         return 0;
 790 }
 791
 792 static void team_queue_override_fini(struct team *team)
 793 {
 794         kfree(team->qom_lists);
 795 }
 796
 797 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
 798 {
 799         return &team->qom_lists[queue_id - 1];
 800 }
 801
 802 /*
 803  * note: already called with rcu_read_lock
 804  */
 805 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
 806 {
 807         struct list_head *qom_list;
 808         struct team_port *port;
 809
 810         if (!team->queue_override_enabled || !skb->queue_mapping)
 811                 return false;
 812         qom_list = __team_get_qom_list(team, skb->queue_mapping);
 813         list_for_each_entry_rcu(port, qom_list, qom_list) {
 814                 if (!team_dev_queue_xmit(team, port, skb))
 815                         return true;
 816         }
 817         return false;
 818 }
 819
 820 static void __team_queue_override_port_del(struct team *team,
 821                                            struct team_port *port)
 822 {
 823         if (!port->queue_id)
 824                 return;
 825         list_del_rcu(&port->qom_list);
 826 }
 827
 828 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
 829                                                       struct team_port *cur)
 830 {
 831         if (port->priority < cur->priority)
 832                 return true;
 833         if (port->priority > cur->priority)
 834                 return false;
 835         if (port->index < cur->index)
 836                 return true;
 837         return false;
 838 }
 839
 840 static void __team_queue_override_port_add(struct team *team,
 841                                            struct team_port *port)
 842 {
 843         struct team_port *cur;
 844         struct list_head *qom_list;
 845         struct list_head *node;
 846
 847         if (!port->queue_id)
 848                 return;
 849         qom_list = __team_get_qom_list(team, port->queue_id);
 850         node = qom_list;
 851         list_for_each_entry(cur, qom_list, qom_list) {
 852                 if (team_queue_override_port_has_gt_prio_than(port, cur))
 853                         break;
 854                 node = &cur->qom_list;
 855         }
 856         list_add_tail_rcu(&port->qom_list, node);
 857 }
 858
 859 static void __team_queue_override_enabled_check(struct team *team)
 860 {
 861         struct team_port *port;
 862         bool enabled = false;
 863
 864         list_for_each_entry(port, &team->port_list, list) {
 865                 if (port->queue_id) {
 866                         enabled = true;
 867                         break;
 868                 }
 869         }
 870         if (enabled == team->queue_override_enabled)
 871                 return;
 872         netdev_dbg(team->dev, "%s queue override\n",
 873                    enabled ? "Enabling" : "Disabling");
 874         team->queue_override_enabled = enabled;
 875 }
 876
 877 static void team_queue_override_port_prio_changed(struct team *team,
 878                                                   struct team_port *port)
 879 {
 880         if (!port->queue_id || team_port_enabled(port))
 881                 return;
 882         __team_queue_override_port_del(team, port);
 883         __team_queue_override_port_add(team, port);
 884         __team_queue_override_enabled_check(team);
 885 }
 886
 887 static void team_queue_override_port_change_queue_id(struct team *team,
 888                                                      struct team_port *port,
 889                                                      u16 new_queue_id)
 890 {
 891         if (team_port_enabled(port)) {
 892                 __team_queue_override_port_del(team, port);
 893                 port->queue_id = new_queue_id;
 894                 __team_queue_override_port_add(team, port);
 895                 __team_queue_override_enabled_check(team);
 896         } else {
 897                 port->queue_id = new_queue_id;
 898         }
 899 }
 900
 901 static void team_queue_override_port_add(struct team *team,
 902                                          struct team_port *port)
 903 {
 904         __team_queue_override_port_add(team, port);
 905         __team_queue_override_enabled_check(team);
 906 }
 907
 908 static void team_queue_override_port_del(struct team *team,
 909                                          struct team_port *port)
 910 {
 911         __team_queue_override_port_del(team, port);
 912         __team_queue_override_enabled_check(team);
 913 }
 914
 915
 916 /****************
 917  * Port handling
 918  ****************/
 919
 920 static bool team_port_find(const struct team *team,
 921                            const struct team_port *port)
 922 {
 923         struct team_port *cur;
 924
 925         list_for_each_entry(cur, &team->port_list, list)
 926                 if (cur == port)
 927                         return true;
 928         return false;
 929 }
 930
 931 /*
 932  * Enable/disable port by adding to enabled port hashlist and setting
 933  * port->index (Might be racy so reader could see incorrect ifindex when
 934  * processing a flying packet, but that is not a problem). Write guarded
 935  * by team->lock.
 936  */
 937 static void team_port_enable(struct team *team,
 938                              struct team_port *port)
 939 {
 940         if (team_port_enabled(port))
 941                 return;
 942         port->index = team->en_port_count++;
 943         hlist_add_head_rcu(&port->hlist,
 944                            team_port_index_hash(team, port->index));
 945         team_adjust_ops(team);
 946         team_queue_override_port_add(team, port);
 947         if (team->ops.port_enabled)
 948                 team->ops.port_enabled(team, port);
 949         team_notify_peers(team);
 950         team_mcast_rejoin(team);
 951         team_lower_state_changed(port);
 952 }
 953
 954 static void __reconstruct_port_hlist(struct team *team, int rm_index)
 955 {
 956         int i;
 957         struct team_port *port;
 958
 959         for (i = rm_index + 1; i < team->en_port_count; i++) {
 960                 port = team_get_port_by_index(team, i);
 961                 hlist_del_rcu(&port->hlist);
 962                 port->index--;
 963                 hlist_add_head_rcu(&port->hlist,
 964                                    team_port_index_hash(team, port->index));
 965         }
 966 }
 967
 968 static void team_port_disable(struct team *team,
 969                               struct team_port *port)
 970 {
 971         if (!team_port_enabled(port))
 972                 return;
 973         if (team->ops.port_disabled)
 974                 team->ops.port_disabled(team, port);
 975         hlist_del_rcu(&port->hlist);
 976         __reconstruct_port_hlist(team, port->index);
 977         port->index = -1;
 978         team->en_port_count--;
 979         team_queue_override_port_del(team, port);
 980         team_adjust_ops(team);
 981         team_lower_state_changed(port);
 982 }
 983
 984 #define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
 985                             NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE | \
 986                             NETIF_F_HIGHDMA | NETIF_F_LRO | \
 987                             NETIF_F_GSO_ENCAP_ALL)
 988
 989 #define TEAM_ENC_FEATURES       (NETIF_F_HW_CSUM | NETIF_F_SG | \
 990                                  NETIF_F_RXCSUM | NETIF_F_GSO_SOFTWARE)
 991
 992 static void __team_compute_features(struct team *team)
 993 {
 994         struct team_port *port;
 995         netdev_features_t vlan_features = TEAM_VLAN_FEATURES;
 996         netdev_features_t enc_features  = TEAM_ENC_FEATURES;
 997         unsigned short max_hard_header_len = ETH_HLEN;
 998         unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
 999                                         IFF_XMIT_DST_RELEASE_PERM;
1000
1001         rcu_read_lock();
1002         if (list_empty(&team->port_list))
1003                 goto done;
1004
1005         vlan_features = netdev_base_features(vlan_features);
1006         enc_features = netdev_base_features(enc_features);
1007
1008         list_for_each_entry_rcu(port, &team->port_list, list) {
1009                 vlan_features = netdev_increment_features(vlan_features,
1010                                         port->dev->vlan_features,
1011                                         TEAM_VLAN_FEATURES);
1012                 enc_features =
1013                         netdev_increment_features(enc_features,
1014                                                   port->dev->hw_enc_features,
1015                                                   TEAM_ENC_FEATURES);
1016
1017                 dst_release_flag &= port->dev->priv_flags;
1018                 if (port->dev->hard_header_len > max_hard_header_len)
1019                         max_hard_header_len = port->dev->hard_header_len;
1020         }
1021 done:
1022         rcu_read_unlock();
1023
1024         team->dev->vlan_features = vlan_features;
1025         team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL |
1026                                      NETIF_F_HW_VLAN_CTAG_TX |
1027                                      NETIF_F_HW_VLAN_STAG_TX;
1028         team->dev->hard_header_len = max_hard_header_len;
1029
1030         team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1031         if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1032                 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1033 }
1034
1035 static void team_compute_features(struct team *team)
1036 {
1037         __team_compute_features(team);
1038         netdev_change_features(team->dev);
1039 }
1040
1041 static int team_port_enter(struct team *team, struct team_port *port)
1042 {
1043         int err = 0;
1044
1045         dev_hold(team->dev);
1046         if (team->ops.port_enter) {
1047                 err = team->ops.port_enter(team, port);
1048                 if (err) {
1049                         netdev_err(team->dev, "Device %s failed to enter team mode\n",
1050                                    port->dev->name);
1051                         goto err_port_enter;
1052                 }
1053         }
1054
1055         return 0;
1056
1057 err_port_enter:
1058         dev_put(team->dev);
1059
1060         return err;
1061 }
1062
1063 static void team_port_leave(struct team *team, struct team_port *port)
1064 {
1065         if (team->ops.port_leave)
1066                 team->ops.port_leave(team, port);
1067         dev_put(team->dev);
1068 }
1069
1070 #ifdef CONFIG_NET_POLL_CONTROLLER
1071 static int __team_port_enable_netpoll(struct team_port *port)
1072 {
1073         struct netpoll *np;
1074         int err;
1075
1076         np = kzalloc(sizeof(*np), GFP_KERNEL);
1077         if (!np)
1078                 return -ENOMEM;
1079
1080         err = __netpoll_setup(np, port->dev);
1081         if (err) {
1082                 kfree(np);
1083                 return err;
1084         }
1085         port->np = np;
1086         return err;
1087 }
1088
1089 static int team_port_enable_netpoll(struct team_port *port)
1090 {
1091         if (!port->team->dev->npinfo)
1092                 return 0;
1093
1094         return __team_port_enable_netpoll(port);
1095 }
1096
1097 static void team_port_disable_netpoll(struct team_port *port)
1098 {
1099         struct netpoll *np = port->np;
1100
1101         if (!np)
1102                 return;
1103         port->np = NULL;
1104
1105         __netpoll_free(np);
1106 }
1107 #else
1108 static int team_port_enable_netpoll(struct team_port *port)
1109 {
1110         return 0;
1111 }
1112 static void team_port_disable_netpoll(struct team_port *port)
1113 {
1114 }
1115 #endif
1116
1117 static int team_upper_dev_link(struct team *team, struct team_port *port,
1118                                struct netlink_ext_ack *extack)
1119 {
1120         struct netdev_lag_upper_info lag_upper_info;
1121         int err;
1122
1123         lag_upper_info.tx_type = team->mode->lag_tx_type;
1124         lag_upper_info.hash_type = NETDEV_LAG_HASH_UNKNOWN;
1125         err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1126                                            &lag_upper_info, extack);
1127         if (err)
1128                 return err;
1129         port->dev->priv_flags |= IFF_TEAM_PORT;
1130         return 0;
1131 }
1132
1133 static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1134 {
1135         netdev_upper_dev_unlink(port->dev, team->dev);
1136         port->dev->priv_flags &= ~IFF_TEAM_PORT;
1137 }
1138
1139 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1140 static int team_dev_type_check_change(struct net_device *dev,
1141                                       struct net_device *port_dev);
1142
1143 static int team_port_add(struct team *team, struct net_device *port_dev,
1144                          struct netlink_ext_ack *extack)
1145 {
1146         struct net_device *dev = team->dev;
1147         struct team_port *port;
1148         char *portname = port_dev->name;
1149         int err;
1150
1151         if (port_dev->flags & IFF_LOOPBACK) {
1152                 NL_SET_ERR_MSG(extack, "Loopback device can't be added as a team port");
1153                 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1154                            portname);
1155                 return -EINVAL;
1156         }
1157
1158         if (netif_is_team_port(port_dev)) {
1159                 NL_SET_ERR_MSG(extack, "Device is already a port of a team device");
1160                 netdev_err(dev, "Device %s is already a port "
1161                                 "of a team device\n", portname);
1162                 return -EBUSY;
1163         }
1164
1165         if (dev == port_dev) {
1166                 NL_SET_ERR_MSG(extack, "Cannot enslave team device to itself");
1167                 netdev_err(dev, "Cannot enslave team device to itself\n");
1168                 return -EINVAL;
1169         }
1170
1171         if (netdev_has_upper_dev(dev, port_dev)) {
1172                 NL_SET_ERR_MSG(extack, "Device is already an upper device of the team interface");
1173                 netdev_err(dev, "Device %s is already an upper device of the team interface\n",
1174                            portname);
1175                 return -EBUSY;
1176         }
1177
1178         if (netdev_has_upper_dev(port_dev, dev)) {
1179                 NL_SET_ERR_MSG(extack, "Device is already a lower device of the team interface");
1180                 netdev_err(dev, "Device %s is already a lower device of the team interface\n",
1181                            portname);
1182                 return -EBUSY;
1183         }
1184
1185         if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1186             vlan_uses_dev(dev)) {
1187                 NL_SET_ERR_MSG(extack, "Device is VLAN challenged and team device has VLAN set up");
1188                 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1189                            portname);
1190                 return -EPERM;
1191         }
1192
1193         err = team_dev_type_check_change(dev, port_dev);
1194         if (err)
1195                 return err;
1196
1197         if (port_dev->flags & IFF_UP) {
1198                 NL_SET_ERR_MSG(extack, "Device is up. Set it down before adding it as a team port");
1199                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1200                            portname);
1201                 return -EBUSY;
1202         }
1203
1204         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1205                        GFP_KERNEL);
1206         if (!port)
1207                 return -ENOMEM;
1208
1209         port->dev = port_dev;
1210         port->team = team;
1211         INIT_LIST_HEAD(&port->qom_list);
1212
1213         port->orig.mtu = port_dev->mtu;
1214         err = dev_set_mtu(port_dev, dev->mtu);
1215         if (err) {
1216                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1217                 goto err_set_mtu;
1218         }
1219
1220         memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1221
1222         err = team_port_enter(team, port);
1223         if (err) {
1224                 netdev_err(dev, "Device %s failed to enter team mode\n",
1225                            portname);
1226                 goto err_port_enter;
1227         }
1228
1229         err = dev_open(port_dev, extack);
1230         if (err) {
1231                 netdev_dbg(dev, "Device %s opening failed\n",
1232                            portname);
1233                 goto err_dev_open;
1234         }
1235
1236         err = vlan_vids_add_by_dev(port_dev, dev);
1237         if (err) {
1238                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1239                                 portname);
1240                 goto err_vids_add;
1241         }
1242
1243         err = team_port_enable_netpoll(port);
1244         if (err) {
1245                 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1246                            portname);
1247                 goto err_enable_netpoll;
1248         }
1249
1250         if (!(dev->features & NETIF_F_LRO))
1251                 dev_disable_lro(port_dev);
1252
1253         err = netdev_rx_handler_register(port_dev, team_handle_frame,
1254                                          port);
1255         if (err) {
1256                 netdev_err(dev, "Device %s failed to register rx_handler\n",
1257                            portname);
1258                 goto err_handler_register;
1259         }
1260
1261         err = team_upper_dev_link(team, port, extack);
1262         if (err) {
1263                 netdev_err(dev, "Device %s failed to set upper link\n",
1264                            portname);
1265                 goto err_set_upper_link;
1266         }
1267
1268         err = __team_option_inst_add_port(team, port);
1269         if (err) {
1270                 netdev_err(dev, "Device %s failed to add per-port options\n",
1271                            portname);
1272                 goto err_option_port_add;
1273         }
1274
1275         /* set promiscuity level to new slave */
1276         if (dev->flags & IFF_PROMISC) {
1277                 err = dev_set_promiscuity(port_dev, 1);
1278                 if (err)
1279                         goto err_set_slave_promisc;
1280         }
1281
1282         /* set allmulti level to new slave */
1283         if (dev->flags & IFF_ALLMULTI) {
1284                 err = dev_set_allmulti(port_dev, 1);
1285                 if (err) {
1286                         if (dev->flags & IFF_PROMISC)
1287                                 dev_set_promiscuity(port_dev, -1);
1288                         goto err_set_slave_promisc;
1289                 }
1290         }
1291
1292         if (dev->flags & IFF_UP) {
1293                 netif_addr_lock_bh(dev);
1294                 dev_uc_sync_multiple(port_dev, dev);
1295                 dev_mc_sync_multiple(port_dev, dev);
1296                 netif_addr_unlock_bh(dev);
1297         }
1298
1299         port->index = -1;
1300         list_add_tail_rcu(&port->list, &team->port_list);
1301         team_port_enable(team, port);
1302         __team_compute_features(team);
1303         __team_port_change_port_added(port, !!netif_oper_up(port_dev));
1304         __team_options_change_check(team);
1305
1306         netdev_info(dev, "Port device %s added\n", portname);
1307
1308         return 0;
1309
1310 err_set_slave_promisc:
1311         __team_option_inst_del_port(team, port);
1312
1313 err_option_port_add:
1314         team_upper_dev_unlink(team, port);
1315
1316 err_set_upper_link:
1317         netdev_rx_handler_unregister(port_dev);
1318
1319 err_handler_register:
1320         team_port_disable_netpoll(port);
1321
1322 err_enable_netpoll:
1323         vlan_vids_del_by_dev(port_dev, dev);
1324
1325 err_vids_add:
1326         dev_close(port_dev);
1327
1328 err_dev_open:
1329         team_port_leave(team, port);
1330         team_port_set_orig_dev_addr(port);
1331
1332 err_port_enter:
1333         dev_set_mtu(port_dev, port->orig.mtu);
1334
1335 err_set_mtu:
1336         kfree(port);
1337
1338         return err;
1339 }
1340
1341 static void __team_port_change_port_removed(struct team_port *port);
1342
1343 static int team_port_del(struct team *team, struct net_device *port_dev)
1344 {
1345         struct net_device *dev = team->dev;
1346         struct team_port *port;
1347         char *portname = port_dev->name;
1348
1349         port = team_port_get_rtnl(port_dev);
1350         if (!port || !team_port_find(team, port)) {
1351                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1352                            portname);
1353                 return -ENOENT;
1354         }
1355
1356         team_port_disable(team, port);
1357         list_del_rcu(&port->list);
1358
1359         if (dev->flags & IFF_PROMISC)
1360                 dev_set_promiscuity(port_dev, -1);
1361         if (dev->flags & IFF_ALLMULTI)
1362                 dev_set_allmulti(port_dev, -1);
1363
1364         team_upper_dev_unlink(team, port);
1365         netdev_rx_handler_unregister(port_dev);
1366         team_port_disable_netpoll(port);
1367         vlan_vids_del_by_dev(port_dev, dev);
1368         if (dev->flags & IFF_UP) {
1369                 dev_uc_unsync(port_dev, dev);
1370                 dev_mc_unsync(port_dev, dev);
1371         }
1372         dev_close(port_dev);
1373         team_port_leave(team, port);
1374
1375         __team_option_inst_mark_removed_port(team, port);
1376         __team_options_change_check(team);
1377         __team_option_inst_del_port(team, port);
1378         __team_port_change_port_removed(port);
1379
1380         team_port_set_orig_dev_addr(port);
1381         dev_set_mtu(port_dev, port->orig.mtu);
1382         kfree_rcu(port, rcu);
1383         netdev_info(dev, "Port device %s removed\n", portname);
1384         __team_compute_features(team);
1385
1386         return 0;
1387 }
1388
1389
1390 /*****************
1391  * Net device ops
1392  *****************/
1393
1394 static void team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1395 {
1396         ctx->data.str_val = team->mode->kind;
1397 }
1398
1399 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1400 {
1401         return team_change_mode(team, ctx->data.str_val);
1402 }
1403
1404 static void team_notify_peers_count_get(struct team *team,
1405                                         struct team_gsetter_ctx *ctx)
1406 {
1407         ctx->data.u32_val = team->notify_peers.count;
1408 }
1409
1410 static int team_notify_peers_count_set(struct team *team,
1411                                        struct team_gsetter_ctx *ctx)
1412 {
1413         team->notify_peers.count = ctx->data.u32_val;
1414         return 0;
1415 }
1416
1417 static void team_notify_peers_interval_get(struct team *team,
1418                                            struct team_gsetter_ctx *ctx)
1419 {
1420         ctx->data.u32_val = team->notify_peers.interval;
1421 }
1422
1423 static int team_notify_peers_interval_set(struct team *team,
1424                                           struct team_gsetter_ctx *ctx)
1425 {
1426         team->notify_peers.interval = ctx->data.u32_val;
1427         return 0;
1428 }
1429
1430 static void team_mcast_rejoin_count_get(struct team *team,
1431                                         struct team_gsetter_ctx *ctx)
1432 {
1433         ctx->data.u32_val = team->mcast_rejoin.count;
1434 }
1435
1436 static int team_mcast_rejoin_count_set(struct team *team,
1437                                        struct team_gsetter_ctx *ctx)
1438 {
1439         team->mcast_rejoin.count = ctx->data.u32_val;
1440         return 0;
1441 }
1442
1443 static void team_mcast_rejoin_interval_get(struct team *team,
1444                                            struct team_gsetter_ctx *ctx)
1445 {
1446         ctx->data.u32_val = team->mcast_rejoin.interval;
1447 }
1448
1449 static int team_mcast_rejoin_interval_set(struct team *team,
1450                                           struct team_gsetter_ctx *ctx)
1451 {
1452         team->mcast_rejoin.interval = ctx->data.u32_val;
1453         return 0;
1454 }
1455
1456 static void team_port_en_option_get(struct team *team,
1457                                     struct team_gsetter_ctx *ctx)
1458 {
1459         struct team_port *port = ctx->info->port;
1460
1461         ctx->data.bool_val = team_port_enabled(port);
1462 }
1463
1464 static int team_port_en_option_set(struct team *team,
1465                                    struct team_gsetter_ctx *ctx)
1466 {
1467         struct team_port *port = ctx->info->port;
1468
1469         if (ctx->data.bool_val)
1470                 team_port_enable(team, port);
1471         else
1472                 team_port_disable(team, port);
1473         return 0;
1474 }
1475
1476 static void team_user_linkup_option_get(struct team *team,
1477                                         struct team_gsetter_ctx *ctx)
1478 {
1479         struct team_port *port = ctx->info->port;
1480
1481         ctx->data.bool_val = port->user.linkup;
1482 }
1483
1484 static void __team_carrier_check(struct team *team);
1485
1486 static int team_user_linkup_option_set(struct team *team,
1487                                        struct team_gsetter_ctx *ctx)
1488 {
1489         struct team_port *port = ctx->info->port;
1490
1491         port->user.linkup = ctx->data.bool_val;
1492         team_refresh_port_linkup(port);
1493         __team_carrier_check(port->team);
1494         return 0;
1495 }
1496
1497 static void team_user_linkup_en_option_get(struct team *team,
1498                                            struct team_gsetter_ctx *ctx)
1499 {
1500         struct team_port *port = ctx->info->port;
1501
1502         ctx->data.bool_val = port->user.linkup_enabled;
1503 }
1504
1505 static int team_user_linkup_en_option_set(struct team *team,
1506                                           struct team_gsetter_ctx *ctx)
1507 {
1508         struct team_port *port = ctx->info->port;
1509
1510         port->user.linkup_enabled = ctx->data.bool_val;
1511         team_refresh_port_linkup(port);
1512         __team_carrier_check(port->team);
1513         return 0;
1514 }
1515
1516 static void team_priority_option_get(struct team *team,
1517                                      struct team_gsetter_ctx *ctx)
1518 {
1519         struct team_port *port = ctx->info->port;
1520
1521         ctx->data.s32_val = port->priority;
1522 }
1523
1524 static int team_priority_option_set(struct team *team,
1525                                     struct team_gsetter_ctx *ctx)
1526 {
1527         struct team_port *port = ctx->info->port;
1528         s32 priority = ctx->data.s32_val;
1529
1530         if (port->priority == priority)
1531                 return 0;
1532         port->priority = priority;
1533         team_queue_override_port_prio_changed(team, port);
1534         return 0;
1535 }
1536
1537 static void team_queue_id_option_get(struct team *team,
1538                                      struct team_gsetter_ctx *ctx)
1539 {
1540         struct team_port *port = ctx->info->port;
1541
1542         ctx->data.u32_val = port->queue_id;
1543 }
1544
1545 static int team_queue_id_option_set(struct team *team,
1546                                     struct team_gsetter_ctx *ctx)
1547 {
1548         struct team_port *port = ctx->info->port;
1549         u16 new_queue_id = ctx->data.u32_val;
1550
1551         if (port->queue_id == new_queue_id)
1552                 return 0;
1553         if (new_queue_id >= team->dev->real_num_tx_queues)
1554                 return -EINVAL;
1555         team_queue_override_port_change_queue_id(team, port, new_queue_id);
1556         return 0;
1557 }
1558
1559 static const struct team_option team_options[] = {
1560         {
1561                 .name = "mode",
1562                 .type = TEAM_OPTION_TYPE_STRING,
1563                 .getter = team_mode_option_get,
1564                 .setter = team_mode_option_set,
1565         },
1566         {
1567                 .name = "notify_peers_count",
1568                 .type = TEAM_OPTION_TYPE_U32,
1569                 .getter = team_notify_peers_count_get,
1570                 .setter = team_notify_peers_count_set,
1571         },
1572         {
1573                 .name = "notify_peers_interval",
1574                 .type = TEAM_OPTION_TYPE_U32,
1575                 .getter = team_notify_peers_interval_get,
1576                 .setter = team_notify_peers_interval_set,
1577         },
1578         {
1579                 .name = "mcast_rejoin_count",
1580                 .type = TEAM_OPTION_TYPE_U32,
1581                 .getter = team_mcast_rejoin_count_get,
1582                 .setter = team_mcast_rejoin_count_set,
1583         },
1584         {
1585                 .name = "mcast_rejoin_interval",
1586                 .type = TEAM_OPTION_TYPE_U32,
1587                 .getter = team_mcast_rejoin_interval_get,
1588                 .setter = team_mcast_rejoin_interval_set,
1589         },
1590         {
1591                 .name = "enabled",
1592                 .type = TEAM_OPTION_TYPE_BOOL,
1593                 .per_port = true,
1594                 .getter = team_port_en_option_get,
1595                 .setter = team_port_en_option_set,
1596         },
1597         {
1598                 .name = "user_linkup",
1599                 .type = TEAM_OPTION_TYPE_BOOL,
1600                 .per_port = true,
1601                 .getter = team_user_linkup_option_get,
1602                 .setter = team_user_linkup_option_set,
1603         },
1604         {
1605                 .name = "user_linkup_enabled",
1606                 .type = TEAM_OPTION_TYPE_BOOL,
1607                 .per_port = true,
1608                 .getter = team_user_linkup_en_option_get,
1609                 .setter = team_user_linkup_en_option_set,
1610         },
1611         {
1612                 .name = "priority",
1613                 .type = TEAM_OPTION_TYPE_S32,
1614                 .per_port = true,
1615                 .getter = team_priority_option_get,
1616                 .setter = team_priority_option_set,
1617         },
1618         {
1619                 .name = "queue_id",
1620                 .type = TEAM_OPTION_TYPE_U32,
1621                 .per_port = true,
1622                 .getter = team_queue_id_option_get,
1623                 .setter = team_queue_id_option_set,
1624         },
1625 };
1626
1627
1628 static int team_init(struct net_device *dev)
1629 {
1630         struct team *team = netdev_priv(dev);
1631         int i;
1632         int err;
1633
1634         team->dev = dev;
1635         team_set_no_mode(team);
1636         team->notifier_ctx = false;
1637
1638         team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1639         if (!team->pcpu_stats)
1640                 return -ENOMEM;
1641
1642         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1643                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1644         INIT_LIST_HEAD(&team->port_list);
1645         err = team_queue_override_init(team);
1646         if (err)
1647                 goto err_team_queue_override_init;
1648
1649         team_adjust_ops(team);
1650
1651         INIT_LIST_HEAD(&team->option_list);
1652         INIT_LIST_HEAD(&team->option_inst_list);
1653
1654         team_notify_peers_init(team);
1655         team_mcast_rejoin_init(team);
1656
1657         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1658         if (err)
1659                 goto err_options_register;
1660         netif_carrier_off(dev);
1661
1662         lockdep_register_key(&team->team_lock_key);
1663         __mutex_init(&team->lock, "team->team_lock_key", &team->team_lock_key);
1664         netdev_lockdep_set_classes(dev);
1665
1666         return 0;
1667
1668 err_options_register:
1669         team_mcast_rejoin_fini(team);
1670         team_notify_peers_fini(team);
1671         team_queue_override_fini(team);
1672 err_team_queue_override_init:
1673         free_percpu(team->pcpu_stats);
1674
1675         return err;
1676 }
1677
1678 static void team_uninit(struct net_device *dev)
1679 {
1680         struct team *team = netdev_priv(dev);
1681         struct team_port *port;
1682         struct team_port *tmp;
1683
1684         mutex_lock(&team->lock);
1685         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1686                 team_port_del(team, port->dev);
1687
1688         __team_change_mode(team, NULL); /* cleanup */
1689         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1690         team_mcast_rejoin_fini(team);
1691         team_notify_peers_fini(team);
1692         team_queue_override_fini(team);
1693         mutex_unlock(&team->lock);
1694         netdev_change_features(dev);
1695         lockdep_unregister_key(&team->team_lock_key);
1696 }
1697
1698 static void team_destructor(struct net_device *dev)
1699 {
1700         struct team *team = netdev_priv(dev);
1701
1702         free_percpu(team->pcpu_stats);
1703 }
1704
1705 static int team_open(struct net_device *dev)
1706 {
1707         return 0;
1708 }
1709
1710 static int team_close(struct net_device *dev)
1711 {
1712         struct team *team = netdev_priv(dev);
1713         struct team_port *port;
1714
1715         list_for_each_entry(port, &team->port_list, list) {
1716                 dev_uc_unsync(port->dev, dev);
1717                 dev_mc_unsync(port->dev, dev);
1718         }
1719
1720         return 0;
1721 }
1722
1723 /*
1724  * note: already called with rcu_read_lock
1725  */
1726 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1727 {
1728         struct team *team = netdev_priv(dev);
1729         bool tx_success;
1730         unsigned int len = skb->len;
1731
1732         tx_success = team_queue_override_transmit(team, skb);
1733         if (!tx_success)
1734                 tx_success = team->ops.transmit(team, skb);
1735         if (tx_success) {
1736                 struct team_pcpu_stats *pcpu_stats;
1737
1738                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1739                 u64_stats_update_begin(&pcpu_stats->syncp);
1740                 u64_stats_inc(&pcpu_stats->tx_packets);
1741                 u64_stats_add(&pcpu_stats->tx_bytes, len);
1742                 u64_stats_update_end(&pcpu_stats->syncp);
1743         } else {
1744                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1745         }
1746
1747         return NETDEV_TX_OK;
1748 }
1749
1750 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1751                              struct net_device *sb_dev)
1752 {
1753         /*
1754          * This helper function exists to help dev_pick_tx get the correct
1755          * destination queue.  Using a helper function skips a call to
1756          * skb_tx_hash and will put the skbs in the queue we expect on their
1757          * way down to the team driver.
1758          */
1759         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1760
1761         /*
1762          * Save the original txq to restore before passing to the driver
1763          */
1764         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1765
1766         if (unlikely(txq >= dev->real_num_tx_queues)) {
1767                 do {
1768                         txq -= dev->real_num_tx_queues;
1769                 } while (txq >= dev->real_num_tx_queues);
1770         }
1771         return txq;
1772 }
1773
1774 static void team_change_rx_flags(struct net_device *dev, int change)
1775 {
1776         struct team *team = netdev_priv(dev);
1777         struct team_port *port;
1778         int inc;
1779
1780         rcu_read_lock();
1781         list_for_each_entry_rcu(port, &team->port_list, list) {
1782                 if (change & IFF_PROMISC) {
1783                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1784                         dev_set_promiscuity(port->dev, inc);
1785                 }
1786                 if (change & IFF_ALLMULTI) {
1787                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1788                         dev_set_allmulti(port->dev, inc);
1789                 }
1790         }
1791         rcu_read_unlock();
1792 }
1793
1794 static void team_set_rx_mode(struct net_device *dev)
1795 {
1796         struct team *team = netdev_priv(dev);
1797         struct team_port *port;
1798
1799         rcu_read_lock();
1800         list_for_each_entry_rcu(port, &team->port_list, list) {
1801                 dev_uc_sync_multiple(port->dev, dev);
1802                 dev_mc_sync_multiple(port->dev, dev);
1803         }
1804         rcu_read_unlock();
1805 }
1806
1807 static int team_set_mac_address(struct net_device *dev, void *p)
1808 {
1809         struct sockaddr *addr = p;
1810         struct team *team = netdev_priv(dev);
1811         struct team_port *port;
1812
1813         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1814                 return -EADDRNOTAVAIL;
1815         dev_addr_set(dev, addr->sa_data);
1816         mutex_lock(&team->lock);
1817         list_for_each_entry(port, &team->port_list, list)
1818                 if (team->ops.port_change_dev_addr)
1819                         team->ops.port_change_dev_addr(team, port);
1820         mutex_unlock(&team->lock);
1821         return 0;
1822 }
1823
1824 static int team_change_mtu(struct net_device *dev, int new_mtu)
1825 {
1826         struct team *team = netdev_priv(dev);
1827         struct team_port *port;
1828         int err;
1829
1830         /*
1831          * Alhough this is reader, it's guarded by team lock. It's not possible
1832          * to traverse list in reverse under rcu_read_lock
1833          */
1834         mutex_lock(&team->lock);
1835         team->port_mtu_change_allowed = true;
1836         list_for_each_entry(port, &team->port_list, list) {
1837                 err = dev_set_mtu(port->dev, new_mtu);
1838                 if (err) {
1839                         netdev_err(dev, "Device %s failed to change mtu",
1840                                    port->dev->name);
1841                         goto unwind;
1842                 }
1843         }
1844         team->port_mtu_change_allowed = false;
1845         mutex_unlock(&team->lock);
1846
1847         WRITE_ONCE(dev->mtu, new_mtu);
1848
1849         return 0;
1850
1851 unwind:
1852         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1853                 dev_set_mtu(port->dev, dev->mtu);
1854         team->port_mtu_change_allowed = false;
1855         mutex_unlock(&team->lock);
1856
1857         return err;
1858 }
1859
1860 static void
1861 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1862 {
1863         struct team *team = netdev_priv(dev);
1864         struct team_pcpu_stats *p;
1865         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1866         u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1867         unsigned int start;
1868         int i;
1869
1870         for_each_possible_cpu(i) {
1871                 p = per_cpu_ptr(team->pcpu_stats, i);
1872                 do {
1873                         start = u64_stats_fetch_begin(&p->syncp);
1874                         rx_packets      = u64_stats_read(&p->rx_packets);
1875                         rx_bytes        = u64_stats_read(&p->rx_bytes);
1876                         rx_multicast    = u64_stats_read(&p->rx_multicast);
1877                         tx_packets      = u64_stats_read(&p->tx_packets);
1878                         tx_bytes        = u64_stats_read(&p->tx_bytes);
1879                 } while (u64_stats_fetch_retry(&p->syncp, start));
1880
1881                 stats->rx_packets       += rx_packets;
1882                 stats->rx_bytes         += rx_bytes;
1883                 stats->multicast        += rx_multicast;
1884                 stats->tx_packets       += tx_packets;
1885                 stats->tx_bytes         += tx_bytes;
1886                 /*
1887                  * rx_dropped, tx_dropped & rx_nohandler are u32,
1888                  * updated without syncp protection.
1889                  */
1890                 rx_dropped      += READ_ONCE(p->rx_dropped);
1891                 tx_dropped      += READ_ONCE(p->tx_dropped);
1892                 rx_nohandler    += READ_ONCE(p->rx_nohandler);
1893         }
1894         stats->rx_dropped       = rx_dropped;
1895         stats->tx_dropped       = tx_dropped;
1896         stats->rx_nohandler     = rx_nohandler;
1897 }
1898
1899 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1900 {
1901         struct team *team = netdev_priv(dev);
1902         struct team_port *port;
1903         int err;
1904
1905         /*
1906          * Alhough this is reader, it's guarded by team lock. It's not possible
1907          * to traverse list in reverse under rcu_read_lock
1908          */
1909         mutex_lock(&team->lock);
1910         list_for_each_entry(port, &team->port_list, list) {
1911                 err = vlan_vid_add(port->dev, proto, vid);
1912                 if (err)
1913                         goto unwind;
1914         }
1915         mutex_unlock(&team->lock);
1916
1917         return 0;
1918
1919 unwind:
1920         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1921                 vlan_vid_del(port->dev, proto, vid);
1922         mutex_unlock(&team->lock);
1923
1924         return err;
1925 }
1926
1927 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1928 {
1929         struct team *team = netdev_priv(dev);
1930         struct team_port *port;
1931
1932         mutex_lock(&team->lock);
1933         list_for_each_entry(port, &team->port_list, list)
1934                 vlan_vid_del(port->dev, proto, vid);
1935         mutex_unlock(&team->lock);
1936
1937         return 0;
1938 }
1939
1940 #ifdef CONFIG_NET_POLL_CONTROLLER
1941 static void team_poll_controller(struct net_device *dev)
1942 {
1943 }
1944
1945 static void __team_netpoll_cleanup(struct team *team)
1946 {
1947         struct team_port *port;
1948
1949         list_for_each_entry(port, &team->port_list, list)
1950                 team_port_disable_netpoll(port);
1951 }
1952
1953 static void team_netpoll_cleanup(struct net_device *dev)
1954 {
1955         struct team *team = netdev_priv(dev);
1956
1957         mutex_lock(&team->lock);
1958         __team_netpoll_cleanup(team);
1959         mutex_unlock(&team->lock);
1960 }
1961
1962 static int team_netpoll_setup(struct net_device *dev)
1963 {
1964         struct team *team = netdev_priv(dev);
1965         struct team_port *port;
1966         int err = 0;
1967
1968         mutex_lock(&team->lock);
1969         list_for_each_entry(port, &team->port_list, list) {
1970                 err = __team_port_enable_netpoll(port);
1971                 if (err) {
1972                         __team_netpoll_cleanup(team);
1973                         break;
1974                 }
1975         }
1976         mutex_unlock(&team->lock);
1977         return err;
1978 }
1979 #endif
1980
1981 static int team_add_slave(struct net_device *dev, struct net_device *port_dev,
1982                           struct netlink_ext_ack *extack)
1983 {
1984         struct team *team = netdev_priv(dev);
1985         int err;
1986
1987         mutex_lock(&team->lock);
1988         err = team_port_add(team, port_dev, extack);
1989         mutex_unlock(&team->lock);
1990
1991         if (!err)
1992                 netdev_change_features(dev);
1993
1994         return err;
1995 }
1996
1997 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1998 {
1999         struct team *team = netdev_priv(dev);
2000         int err;
2001
2002         mutex_lock(&team->lock);
2003         err = team_port_del(team, port_dev);
2004         mutex_unlock(&team->lock);
2005
2006         if (err)
2007                 return err;
2008
2009         if (netif_is_team_master(port_dev)) {
2010                 lockdep_unregister_key(&team->team_lock_key);
2011                 lockdep_register_key(&team->team_lock_key);
2012                 lockdep_set_class(&team->lock, &team->team_lock_key);
2013         }
2014         netdev_change_features(dev);
2015
2016         return err;
2017 }
2018
2019 static netdev_features_t team_fix_features(struct net_device *dev,
2020                                            netdev_features_t features)
2021 {
2022         struct team_port *port;
2023         struct team *team = netdev_priv(dev);
2024         netdev_features_t mask;
2025
2026         mask = features;
2027         features = netdev_base_features(features);
2028
2029         rcu_read_lock();
2030         list_for_each_entry_rcu(port, &team->port_list, list) {
2031                 features = netdev_increment_features(features,
2032                                                      port->dev->features,
2033                                                      mask);
2034         }
2035         rcu_read_unlock();
2036
2037         features = netdev_add_tso_features(features, mask);
2038
2039         return features;
2040 }
2041
2042 static int team_change_carrier(struct net_device *dev, bool new_carrier)
2043 {
2044         struct team *team = netdev_priv(dev);
2045
2046         team->user_carrier_enabled = true;
2047
2048         if (new_carrier)
2049                 netif_carrier_on(dev);
2050         else
2051                 netif_carrier_off(dev);
2052         return 0;
2053 }
2054
2055 static const struct net_device_ops team_netdev_ops = {
2056         .ndo_init               = team_init,
2057         .ndo_uninit             = team_uninit,
2058         .ndo_open               = team_open,
2059         .ndo_stop               = team_close,
2060         .ndo_start_xmit         = team_xmit,
2061         .ndo_select_queue       = team_select_queue,
2062         .ndo_change_rx_flags    = team_change_rx_flags,
2063         .ndo_set_rx_mode        = team_set_rx_mode,
2064         .ndo_set_mac_address    = team_set_mac_address,
2065         .ndo_change_mtu         = team_change_mtu,
2066         .ndo_get_stats64        = team_get_stats64,
2067         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
2068         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
2069 #ifdef CONFIG_NET_POLL_CONTROLLER
2070         .ndo_poll_controller    = team_poll_controller,
2071         .ndo_netpoll_setup      = team_netpoll_setup,
2072         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
2073 #endif
2074         .ndo_add_slave          = team_add_slave,
2075         .ndo_del_slave          = team_del_slave,
2076         .ndo_fix_features       = team_fix_features,
2077         .ndo_change_carrier     = team_change_carrier,
2078         .ndo_features_check     = passthru_features_check,
2079 };
2080
2081 /***********************
2082  * ethtool interface
2083  ***********************/
2084
2085 static void team_ethtool_get_drvinfo(struct net_device *dev,
2086                                      struct ethtool_drvinfo *drvinfo)
2087 {
2088         strscpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2089 }
2090
2091 static int team_ethtool_get_link_ksettings(struct net_device *dev,
2092                                            struct ethtool_link_ksettings *cmd)
2093 {
2094         struct team *team= netdev_priv(dev);
2095         unsigned long speed = 0;
2096         struct team_port *port;
2097
2098         cmd->base.duplex = DUPLEX_UNKNOWN;
2099         cmd->base.port = PORT_OTHER;
2100
2101         rcu_read_lock();
2102         list_for_each_entry_rcu(port, &team->port_list, list) {
2103                 if (team_port_txable(port)) {
2104                         if (port->state.speed != SPEED_UNKNOWN)
2105                                 speed += port->state.speed;
2106                         if (cmd->base.duplex == DUPLEX_UNKNOWN &&
2107                             port->state.duplex != DUPLEX_UNKNOWN)
2108                                 cmd->base.duplex = port->state.duplex;
2109                 }
2110         }
2111         rcu_read_unlock();
2112
2113         cmd->base.speed = speed ? : SPEED_UNKNOWN;
2114
2115         return 0;
2116 }
2117
2118 static const struct ethtool_ops team_ethtool_ops = {
2119         .get_drvinfo            = team_ethtool_get_drvinfo,
2120         .get_link               = ethtool_op_get_link,
2121         .get_link_ksettings     = team_ethtool_get_link_ksettings,
2122 };
2123
2124 /***********************
2125  * rt netlink interface
2126  ***********************/
2127
2128 static void team_setup_by_port(struct net_device *dev,
2129                                struct net_device *port_dev)
2130 {
2131         struct team *team = netdev_priv(dev);
2132
2133         if (port_dev->type == ARPHRD_ETHER)
2134                 dev->header_ops = team->header_ops_cache;
2135         else
2136                 dev->header_ops = port_dev->header_ops;
2137         dev->type = port_dev->type;
2138         dev->hard_header_len = port_dev->hard_header_len;
2139         dev->needed_headroom = port_dev->needed_headroom;
2140         dev->addr_len = port_dev->addr_len;
2141         dev->mtu = port_dev->mtu;
2142         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2143         eth_hw_addr_inherit(dev, port_dev);
2144
2145         if (port_dev->flags & IFF_POINTOPOINT) {
2146                 dev->flags &= ~(IFF_BROADCAST | IFF_MULTICAST);
2147                 dev->flags |= (IFF_POINTOPOINT | IFF_NOARP);
2148         } else if ((port_dev->flags & (IFF_BROADCAST | IFF_MULTICAST)) ==
2149                     (IFF_BROADCAST | IFF_MULTICAST)) {
2150                 dev->flags |= (IFF_BROADCAST | IFF_MULTICAST);
2151                 dev->flags &= ~(IFF_POINTOPOINT | IFF_NOARP);
2152         }
2153 }
2154
2155 static int team_dev_type_check_change(struct net_device *dev,
2156                                       struct net_device *port_dev)
2157 {
2158         struct team *team = netdev_priv(dev);
2159         char *portname = port_dev->name;
2160         int err;
2161
2162         if (dev->type == port_dev->type)
2163                 return 0;
2164         if (!list_empty(&team->port_list)) {
2165                 netdev_err(dev, "Device %s is of different type\n", portname);
2166                 return -EBUSY;
2167         }
2168         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2169         err = notifier_to_errno(err);
2170         if (err) {
2171                 netdev_err(dev, "Refused to change device type\n");
2172                 return err;
2173         }
2174         dev_uc_flush(dev);
2175         dev_mc_flush(dev);
2176         team_setup_by_port(dev, port_dev);
2177         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2178         return 0;
2179 }
2180
2181 static void team_setup(struct net_device *dev)
2182 {
2183         struct team *team = netdev_priv(dev);
2184
2185         ether_setup(dev);
2186         dev->max_mtu = ETH_MAX_MTU;
2187         team->header_ops_cache = dev->header_ops;
2188
2189         dev->netdev_ops = &team_netdev_ops;
2190         dev->ethtool_ops = &team_ethtool_ops;
2191         dev->needs_free_netdev = true;
2192         dev->priv_destructor = team_destructor;
2193         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2194         dev->priv_flags |= IFF_NO_QUEUE;
2195         dev->priv_flags |= IFF_TEAM;
2196
2197         /*
2198          * Indicate we support unicast address filtering. That way core won't
2199          * bring us to promisc mode in case a unicast addr is added.
2200          * Let this up to underlay drivers.
2201          */
2202         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2203         dev->lltx = true;
2204
2205         /* Don't allow team devices to change network namespaces. */
2206         dev->netns_local = true;
2207
2208         dev->features |= NETIF_F_GRO;
2209
2210         dev->hw_features = TEAM_VLAN_FEATURES |
2211                            NETIF_F_HW_VLAN_CTAG_RX |
2212                            NETIF_F_HW_VLAN_CTAG_FILTER |
2213                            NETIF_F_HW_VLAN_STAG_RX |
2214                            NETIF_F_HW_VLAN_STAG_FILTER;
2215
2216         dev->hw_features |= NETIF_F_GSO_ENCAP_ALL;
2217         dev->features |= dev->hw_features;
2218         dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
2219 }
2220
2221 static int team_newlink(struct net *src_net, struct net_device *dev,
2222                         struct nlattr *tb[], struct nlattr *data[],
2223                         struct netlink_ext_ack *extack)
2224 {
2225         if (tb[IFLA_ADDRESS] == NULL)
2226                 eth_hw_addr_random(dev);
2227
2228         return register_netdevice(dev);
2229 }
2230
2231 static int team_validate(struct nlattr *tb[], struct nlattr *data[],
2232                          struct netlink_ext_ack *extack)
2233 {
2234         if (tb[IFLA_ADDRESS]) {
2235                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2236                         return -EINVAL;
2237                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2238                         return -EADDRNOTAVAIL;
2239         }
2240         return 0;
2241 }
2242
2243 static unsigned int team_get_num_tx_queues(void)
2244 {
2245         return TEAM_DEFAULT_NUM_TX_QUEUES;
2246 }
2247
2248 static unsigned int team_get_num_rx_queues(void)
2249 {
2250         return TEAM_DEFAULT_NUM_RX_QUEUES;
2251 }
2252
2253 static struct rtnl_link_ops team_link_ops __read_mostly = {
2254         .kind                   = DRV_NAME,
2255         .priv_size              = sizeof(struct team),
2256         .setup                  = team_setup,
2257         .newlink                = team_newlink,
2258         .validate               = team_validate,
2259         .get_num_tx_queues      = team_get_num_tx_queues,
2260         .get_num_rx_queues      = team_get_num_rx_queues,
2261 };
2262
2263
2264 /***********************************
2265  * Generic netlink custom interface
2266  ***********************************/
2267
2268 static struct genl_family team_nl_family;
2269
2270 int team_nl_noop_doit(struct sk_buff *skb, struct genl_info *info)
2271 {
2272         struct sk_buff *msg;
2273         void *hdr;
2274         int err;
2275
2276         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2277         if (!msg)
2278                 return -ENOMEM;
2279
2280         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2281                           &team_nl_family, 0, TEAM_CMD_NOOP);
2282         if (!hdr) {
2283                 err = -EMSGSIZE;
2284                 goto err_msg_put;
2285         }
2286
2287         genlmsg_end(msg, hdr);
2288
2289         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2290
2291 err_msg_put:
2292         nlmsg_free(msg);
2293
2294         return err;
2295 }
2296
2297 /*
2298  * Netlink cmd functions should be locked by following two functions.
2299  * Since dev gets held here, that ensures dev won't disappear in between.
2300  */
2301 static struct team *team_nl_team_get(struct genl_info *info)
2302 {
2303         struct net *net = genl_info_net(info);
2304         int ifindex;
2305         struct net_device *dev;
2306         struct team *team;
2307
2308         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2309                 return NULL;
2310
2311         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2312         dev = dev_get_by_index(net, ifindex);
2313         if (!dev || dev->netdev_ops != &team_netdev_ops) {
2314                 dev_put(dev);
2315                 return NULL;
2316         }
2317
2318         team = netdev_priv(dev);
2319         mutex_lock(&team->lock);
2320         return team;
2321 }
2322
2323 static void team_nl_team_put(struct team *team)
2324 {
2325         mutex_unlock(&team->lock);
2326         dev_put(team->dev);
2327 }
2328
2329 typedef int team_nl_send_func_t(struct sk_buff *skb,
2330                                 struct team *team, u32 portid);
2331
2332 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2333 {
2334         return genlmsg_unicast(dev_net(team->dev), skb, portid);
2335 }
2336
2337 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2338                                        struct team_option_inst *opt_inst)
2339 {
2340         struct nlattr *option_item;
2341         struct team_option *option = opt_inst->option;
2342         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2343         struct team_gsetter_ctx ctx;
2344         int err;
2345
2346         ctx.info = opt_inst_info;
2347         err = team_option_get(team, opt_inst, &ctx);
2348         if (err)
2349                 return err;
2350
2351         option_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_OPTION);
2352         if (!option_item)
2353                 return -EMSGSIZE;
2354
2355         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2356                 goto nest_cancel;
2357         if (opt_inst_info->port &&
2358             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2359                         opt_inst_info->port->dev->ifindex))
2360                 goto nest_cancel;
2361         if (opt_inst->option->array_size &&
2362             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2363                         opt_inst_info->array_index))
2364                 goto nest_cancel;
2365
2366         switch (option->type) {
2367         case TEAM_OPTION_TYPE_U32:
2368                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2369                         goto nest_cancel;
2370                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2371                         goto nest_cancel;
2372                 break;
2373         case TEAM_OPTION_TYPE_STRING:
2374                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2375                         goto nest_cancel;
2376                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2377                                    ctx.data.str_val))
2378                         goto nest_cancel;
2379                 break;
2380         case TEAM_OPTION_TYPE_BINARY:
2381                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2382                         goto nest_cancel;
2383                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2384                             ctx.data.bin_val.ptr))
2385                         goto nest_cancel;
2386                 break;
2387         case TEAM_OPTION_TYPE_BOOL:
2388                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2389                         goto nest_cancel;
2390                 if (ctx.data.bool_val &&
2391                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2392                         goto nest_cancel;
2393                 break;
2394         case TEAM_OPTION_TYPE_S32:
2395                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2396                         goto nest_cancel;
2397                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2398                         goto nest_cancel;
2399                 break;
2400         default:
2401                 BUG();
2402         }
2403         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2404                 goto nest_cancel;
2405         if (opt_inst->changed) {
2406                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2407                         goto nest_cancel;
2408                 opt_inst->changed = false;
2409         }
2410         nla_nest_end(skb, option_item);
2411         return 0;
2412
2413 nest_cancel:
2414         nla_nest_cancel(skb, option_item);
2415         return -EMSGSIZE;
2416 }
2417
2418 static int __send_and_alloc_skb(struct sk_buff **pskb,
2419                                 struct team *team, u32 portid,
2420                                 team_nl_send_func_t *send_func)
2421 {
2422         int err;
2423
2424         if (*pskb) {
2425                 err = send_func(*pskb, team, portid);
2426                 if (err)
2427                         return err;
2428         }
2429         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2430         if (!*pskb)
2431                 return -ENOMEM;
2432         return 0;
2433 }
2434
2435 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2436                                     int flags, team_nl_send_func_t *send_func,
2437                                     struct list_head *sel_opt_inst_list)
2438 {
2439         struct nlattr *option_list;
2440         struct nlmsghdr *nlh;
2441         void *hdr;
2442         struct team_option_inst *opt_inst;
2443         int err;
2444         struct sk_buff *skb = NULL;
2445         bool incomplete;
2446         int i;
2447
2448         opt_inst = list_first_entry(sel_opt_inst_list,
2449                                     struct team_option_inst, tmp_list);
2450
2451 start_again:
2452         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2453         if (err)
2454                 return err;
2455
2456         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2457                           TEAM_CMD_OPTIONS_GET);
2458         if (!hdr) {
2459                 nlmsg_free(skb);
2460                 return -EMSGSIZE;
2461         }
2462
2463         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2464                 goto nla_put_failure;
2465         option_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_OPTION);
2466         if (!option_list)
2467                 goto nla_put_failure;
2468
2469         i = 0;
2470         incomplete = false;
2471         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2472                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2473                 if (err) {
2474                         if (err == -EMSGSIZE) {
2475                                 if (!i)
2476                                         goto errout;
2477                                 incomplete = true;
2478                                 break;
2479                         }
2480                         goto errout;
2481                 }
2482                 i++;
2483         }
2484
2485         nla_nest_end(skb, option_list);
2486         genlmsg_end(skb, hdr);
2487         if (incomplete)
2488                 goto start_again;
2489
2490 send_done:
2491         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2492         if (!nlh) {
2493                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2494                 if (err)
2495                         return err;
2496                 goto send_done;
2497         }
2498
2499         return send_func(skb, team, portid);
2500
2501 nla_put_failure:
2502         err = -EMSGSIZE;
2503 errout:
2504         nlmsg_free(skb);
2505         return err;
2506 }
2507
2508 int team_nl_options_get_doit(struct sk_buff *skb, struct genl_info *info)
2509 {
2510         struct team *team;
2511         struct team_option_inst *opt_inst;
2512         int err;
2513         LIST_HEAD(sel_opt_inst_list);
2514
2515         team = team_nl_team_get(info);
2516         if (!team)
2517                 return -EINVAL;
2518
2519         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2520                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2521         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2522                                        NLM_F_ACK, team_nl_send_unicast,
2523                                        &sel_opt_inst_list);
2524
2525         team_nl_team_put(team);
2526
2527         return err;
2528 }
2529
2530 static int team_nl_send_event_options_get(struct team *team,
2531                                           struct list_head *sel_opt_inst_list);
2532
2533 int team_nl_options_set_doit(struct sk_buff *skb, struct genl_info *info)
2534 {
2535         struct team *team;
2536         int err = 0;
2537         int i;
2538         struct nlattr *nl_option;
2539
2540         rtnl_lock();
2541
2542         team = team_nl_team_get(info);
2543         if (!team) {
2544                 err = -EINVAL;
2545                 goto rtnl_unlock;
2546         }
2547
2548         err = -EINVAL;
2549         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2550                 err = -EINVAL;
2551                 goto team_put;
2552         }
2553
2554         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2555                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2556                 struct nlattr *attr;
2557                 struct nlattr *attr_data;
2558                 LIST_HEAD(opt_inst_list);
2559                 enum team_option_type opt_type;
2560                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2561                 u32 opt_array_index = 0;
2562                 bool opt_is_array = false;
2563                 struct team_option_inst *opt_inst;
2564                 char *opt_name;
2565                 bool opt_found = false;
2566
2567                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2568                         err = -EINVAL;
2569                         goto team_put;
2570                 }
2571                 err = nla_parse_nested_deprecated(opt_attrs,
2572                                                   TEAM_ATTR_OPTION_MAX,
2573                                                   nl_option,
2574                                                   team_attr_option_nl_policy,
2575                                                   info->extack);
2576                 if (err)
2577                         goto team_put;
2578                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2579                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2580                         err = -EINVAL;
2581                         goto team_put;
2582                 }
2583                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2584                 case NLA_U32:
2585                         opt_type = TEAM_OPTION_TYPE_U32;
2586                         break;
2587                 case NLA_STRING:
2588                         opt_type = TEAM_OPTION_TYPE_STRING;
2589                         break;
2590                 case NLA_BINARY:
2591                         opt_type = TEAM_OPTION_TYPE_BINARY;
2592                         break;
2593                 case NLA_FLAG:
2594                         opt_type = TEAM_OPTION_TYPE_BOOL;
2595                         break;
2596                 case NLA_S32:
2597                         opt_type = TEAM_OPTION_TYPE_S32;
2598                         break;
2599                 default:
2600                         goto team_put;
2601                 }
2602
2603                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2604                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2605                         err = -EINVAL;
2606                         goto team_put;
2607                 }
2608
2609                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2610                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2611                 if (attr)
2612                         opt_port_ifindex = nla_get_u32(attr);
2613
2614                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2615                 if (attr) {
2616                         opt_is_array = true;
2617                         opt_array_index = nla_get_u32(attr);
2618                 }
2619
2620                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2621                         struct team_option *option = opt_inst->option;
2622                         struct team_gsetter_ctx ctx;
2623                         struct team_option_inst_info *opt_inst_info;
2624                         int tmp_ifindex;
2625
2626                         opt_inst_info = &opt_inst->info;
2627                         tmp_ifindex = opt_inst_info->port ?
2628                                       opt_inst_info->port->dev->ifindex : 0;
2629                         if (option->type != opt_type ||
2630                             strcmp(option->name, opt_name) ||
2631                             tmp_ifindex != opt_port_ifindex ||
2632                             (option->array_size && !opt_is_array) ||
2633                             opt_inst_info->array_index != opt_array_index)
2634                                 continue;
2635                         opt_found = true;
2636                         ctx.info = opt_inst_info;
2637                         switch (opt_type) {
2638                         case TEAM_OPTION_TYPE_U32:
2639                                 ctx.data.u32_val = nla_get_u32(attr_data);
2640                                 break;
2641                         case TEAM_OPTION_TYPE_STRING:
2642                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN ||
2643                                     !memchr(nla_data(attr_data), '\0',
2644                                             nla_len(attr_data))) {
2645                                         err = -EINVAL;
2646                                         goto team_put;
2647                                 }
2648                                 ctx.data.str_val = nla_data(attr_data);
2649                                 break;
2650                         case TEAM_OPTION_TYPE_BINARY:
2651                                 ctx.data.bin_val.len = nla_len(attr_data);
2652                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2653                                 break;
2654                         case TEAM_OPTION_TYPE_BOOL:
2655                                 ctx.data.bool_val = attr_data ? true : false;
2656                                 break;
2657                         case TEAM_OPTION_TYPE_S32:
2658                                 ctx.data.s32_val = nla_get_s32(attr_data);
2659                                 break;
2660                         default:
2661                                 BUG();
2662                         }
2663                         err = team_option_set(team, opt_inst, &ctx);
2664                         if (err)
2665                                 goto team_put;
2666                         opt_inst->changed = true;
2667                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2668                 }
2669                 if (!opt_found) {
2670                         err = -ENOENT;
2671                         goto team_put;
2672                 }
2673
2674                 err = team_nl_send_event_options_get(team, &opt_inst_list);
2675                 if (err)
2676                         break;
2677         }
2678
2679 team_put:
2680         team_nl_team_put(team);
2681 rtnl_unlock:
2682         rtnl_unlock();
2683         return err;
2684 }
2685
2686 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2687                                      struct team_port *port)
2688 {
2689         struct nlattr *port_item;
2690
2691         port_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_PORT);
2692         if (!port_item)
2693                 goto nest_cancel;
2694         if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2695                 goto nest_cancel;
2696         if (port->changed) {
2697                 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2698                         goto nest_cancel;
2699                 port->changed = false;
2700         }
2701         if ((port->removed &&
2702              nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2703             (port->state.linkup &&
2704              nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2705             nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2706             nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2707                 goto nest_cancel;
2708         nla_nest_end(skb, port_item);
2709         return 0;
2710
2711 nest_cancel:
2712         nla_nest_cancel(skb, port_item);
2713         return -EMSGSIZE;
2714 }
2715
2716 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2717                                       int flags, team_nl_send_func_t *send_func,
2718                                       struct team_port *one_port)
2719 {
2720         struct nlattr *port_list;
2721         struct nlmsghdr *nlh;
2722         void *hdr;
2723         struct team_port *port;
2724         int err;
2725         struct sk_buff *skb = NULL;
2726         bool incomplete;
2727         int i;
2728
2729         port = list_first_entry_or_null(&team->port_list,
2730                                         struct team_port, list);
2731
2732 start_again:
2733         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2734         if (err)
2735                 return err;
2736
2737         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2738                           TEAM_CMD_PORT_LIST_GET);
2739         if (!hdr) {
2740                 nlmsg_free(skb);
2741                 return -EMSGSIZE;
2742         }
2743
2744         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2745                 goto nla_put_failure;
2746         port_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_PORT);
2747         if (!port_list)
2748                 goto nla_put_failure;
2749
2750         i = 0;
2751         incomplete = false;
2752
2753         /* If one port is selected, called wants to send port list containing
2754          * only this port. Otherwise go through all listed ports and send all
2755          */
2756         if (one_port) {
2757                 err = team_nl_fill_one_port_get(skb, one_port);
2758                 if (err)
2759                         goto errout;
2760         } else if (port) {
2761                 list_for_each_entry_from(port, &team->port_list, list) {
2762                         err = team_nl_fill_one_port_get(skb, port);
2763                         if (err) {
2764                                 if (err == -EMSGSIZE) {
2765                                         if (!i)
2766                                                 goto errout;
2767                                         incomplete = true;
2768                                         break;
2769                                 }
2770                                 goto errout;
2771                         }
2772                         i++;
2773                 }
2774         }
2775
2776         nla_nest_end(skb, port_list);
2777         genlmsg_end(skb, hdr);
2778         if (incomplete)
2779                 goto start_again;
2780
2781 send_done:
2782         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2783         if (!nlh) {
2784                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2785                 if (err)
2786                         return err;
2787                 goto send_done;
2788         }
2789
2790         return send_func(skb, team, portid);
2791
2792 nla_put_failure:
2793         err = -EMSGSIZE;
2794 errout:
2795         nlmsg_free(skb);
2796         return err;
2797 }
2798
2799 int team_nl_port_list_get_doit(struct sk_buff *skb,
2800                                struct genl_info *info)
2801 {
2802         struct team *team;
2803         int err;
2804
2805         team = team_nl_team_get(info);
2806         if (!team)
2807                 return -EINVAL;
2808
2809         err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2810                                          NLM_F_ACK, team_nl_send_unicast, NULL);
2811
2812         team_nl_team_put(team);
2813
2814         return err;
2815 }
2816
2817 static const struct genl_multicast_group team_nl_mcgrps[] = {
2818         { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2819 };
2820
2821 static struct genl_family team_nl_family __ro_after_init = {
2822         .name           = TEAM_GENL_NAME,
2823         .version        = TEAM_GENL_VERSION,
2824         .maxattr        = ARRAY_SIZE(team_nl_policy) - 1,
2825         .policy = team_nl_policy,
2826         .netnsok        = true,
2827         .module         = THIS_MODULE,
2828         .small_ops      = team_nl_ops,
2829         .n_small_ops    = ARRAY_SIZE(team_nl_ops),
2830         .resv_start_op  = TEAM_CMD_PORT_LIST_GET + 1,
2831         .mcgrps         = team_nl_mcgrps,
2832         .n_mcgrps       = ARRAY_SIZE(team_nl_mcgrps),
2833 };
2834
2835 static int team_nl_send_multicast(struct sk_buff *skb,
2836                                   struct team *team, u32 portid)
2837 {
2838         return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2839                                        skb, 0, 0, GFP_KERNEL);
2840 }
2841
2842 static int team_nl_send_event_options_get(struct team *team,
2843                                           struct list_head *sel_opt_inst_list)
2844 {
2845         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2846                                         sel_opt_inst_list);
2847 }
2848
2849 static int team_nl_send_event_port_get(struct team *team,
2850                                        struct team_port *port)
2851 {
2852         return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2853                                           port);
2854 }
2855
2856 static int __init team_nl_init(void)
2857 {
2858         return genl_register_family(&team_nl_family);
2859 }
2860
2861 static void __exit team_nl_fini(void)
2862 {
2863         genl_unregister_family(&team_nl_family);
2864 }
2865
2866
2867 /******************
2868  * Change checkers
2869  ******************/
2870
2871 static void __team_options_change_check(struct team *team)
2872 {
2873         int err;
2874         struct team_option_inst *opt_inst;
2875         LIST_HEAD(sel_opt_inst_list);
2876
2877         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2878                 if (opt_inst->changed)
2879                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2880         }
2881         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2882         if (err && err != -ESRCH)
2883                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2884                             err);
2885 }
2886
2887 /* rtnl lock is held */
2888
2889 static void __team_port_change_send(struct team_port *port, bool linkup)
2890 {
2891         int err;
2892
2893         port->changed = true;
2894         port->state.linkup = linkup;
2895         team_refresh_port_linkup(port);
2896         if (linkup) {
2897                 struct ethtool_link_ksettings ecmd;
2898
2899                 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2900                 if (!err) {
2901                         port->state.speed = ecmd.base.speed;
2902                         port->state.duplex = ecmd.base.duplex;
2903                         goto send_event;
2904                 }
2905         }
2906         port->state.speed = 0;
2907         port->state.duplex = 0;
2908
2909 send_event:
2910         err = team_nl_send_event_port_get(port->team, port);
2911         if (err && err != -ESRCH)
2912                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2913                             port->dev->name, err);
2914
2915 }
2916
2917 static void __team_carrier_check(struct team *team)
2918 {
2919         struct team_port *port;
2920         bool team_linkup;
2921
2922         if (team->user_carrier_enabled)
2923                 return;
2924
2925         team_linkup = false;
2926         list_for_each_entry(port, &team->port_list, list) {
2927                 if (port->linkup) {
2928                         team_linkup = true;
2929                         break;
2930                 }
2931         }
2932
2933         if (team_linkup)
2934                 netif_carrier_on(team->dev);
2935         else
2936                 netif_carrier_off(team->dev);
2937 }
2938
2939 static void __team_port_change_check(struct team_port *port, bool linkup)
2940 {
2941         if (port->state.linkup != linkup)
2942                 __team_port_change_send(port, linkup);
2943         __team_carrier_check(port->team);
2944 }
2945
2946 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2947 {
2948         __team_port_change_send(port, linkup);
2949         __team_carrier_check(port->team);
2950 }
2951
2952 static void __team_port_change_port_removed(struct team_port *port)
2953 {
2954         port->removed = true;
2955         __team_port_change_send(port, false);
2956         __team_carrier_check(port->team);
2957 }
2958
2959 static void team_port_change_check(struct team_port *port, bool linkup)
2960 {
2961         struct team *team = port->team;
2962
2963         mutex_lock(&team->lock);
2964         __team_port_change_check(port, linkup);
2965         mutex_unlock(&team->lock);
2966 }
2967
2968
2969 /************************************
2970  * Net device notifier event handler
2971  ************************************/
2972
2973 static int team_device_event(struct notifier_block *unused,
2974                              unsigned long event, void *ptr)
2975 {
2976         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2977         struct team_port *port;
2978
2979         port = team_port_get_rtnl(dev);
2980         if (!port)
2981                 return NOTIFY_DONE;
2982
2983         switch (event) {
2984         case NETDEV_UP:
2985                 if (netif_oper_up(dev))
2986                         team_port_change_check(port, true);
2987                 break;
2988         case NETDEV_DOWN:
2989                 team_port_change_check(port, false);
2990                 break;
2991         case NETDEV_CHANGE:
2992                 if (netif_running(port->dev))
2993                         team_port_change_check(port,
2994                                                !!netif_oper_up(port->dev));
2995                 break;
2996         case NETDEV_UNREGISTER:
2997                 team_del_slave(port->team->dev, dev);
2998                 break;
2999         case NETDEV_FEAT_CHANGE:
3000                 if (!port->team->notifier_ctx) {
3001                         port->team->notifier_ctx = true;
3002                         team_compute_features(port->team);
3003                         port->team->notifier_ctx = false;
3004                 }
3005                 break;
3006         case NETDEV_PRECHANGEMTU:
3007                 /* Forbid to change mtu of underlaying device */
3008                 if (!port->team->port_mtu_change_allowed)
3009                         return NOTIFY_BAD;
3010                 break;
3011         case NETDEV_PRE_TYPE_CHANGE:
3012                 /* Forbid to change type of underlaying device */
3013                 return NOTIFY_BAD;
3014         case NETDEV_RESEND_IGMP:
3015                 /* Propagate to master device */
3016                 call_netdevice_notifiers(event, port->team->dev);
3017                 break;
3018         }
3019         return NOTIFY_DONE;
3020 }
3021
3022 static struct notifier_block team_notifier_block __read_mostly = {
3023         .notifier_call = team_device_event,
3024 };
3025
3026
3027 /***********************
3028  * Module init and exit
3029  ***********************/
3030
3031 static int __init team_module_init(void)
3032 {
3033         int err;
3034
3035         register_netdevice_notifier(&team_notifier_block);
3036
3037         err = rtnl_link_register(&team_link_ops);
3038         if (err)
3039                 goto err_rtnl_reg;
3040
3041         err = team_nl_init();
3042         if (err)
3043                 goto err_nl_init;
3044
3045         return 0;
3046
3047 err_nl_init:
3048         rtnl_link_unregister(&team_link_ops);
3049
3050 err_rtnl_reg:
3051         unregister_netdevice_notifier(&team_notifier_block);
3052
3053         return err;
3054 }
3055
3056 static void __exit team_module_exit(void)
3057 {
3058         team_nl_fini();
3059         rtnl_link_unregister(&team_link_ops);
3060         unregister_netdevice_notifier(&team_notifier_block);
3061 }
3062
3063 module_init(team_module_init);
3064 module_exit(team_module_exit);
3065
3066 MODULE_LICENSE("GPL v2");
3067 MODULE_AUTHOR("Jiri Pirko <[email protected]>");
3068 MODULE_DESCRIPTION("Ethernet team device driver");
3069 MODULE_ALIAS_RTNL_LINK(DRV_NAME);