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
 988 #define TEAM_ENC_FEATURES       (NETIF_F_HW_CSUM | NETIF_F_SG | \
 989                                  NETIF_F_RXCSUM | NETIF_F_GSO_SOFTWARE)
 990
 991 static void __team_compute_features(struct team *team)
 992 {
 993         struct team_port *port;
 994         netdev_features_t vlan_features = TEAM_VLAN_FEATURES &
 995                                           NETIF_F_ALL_FOR_ALL;
 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         list_for_each_entry_rcu(port, &team->port_list, list) {
1003                 vlan_features = netdev_increment_features(vlan_features,
1004                                         port->dev->vlan_features,
1005                                         TEAM_VLAN_FEATURES);
1006                 enc_features =
1007                         netdev_increment_features(enc_features,
1008                                                   port->dev->hw_enc_features,
1009                                                   TEAM_ENC_FEATURES);
1010
1011
1012                 dst_release_flag &= port->dev->priv_flags;
1013                 if (port->dev->hard_header_len > max_hard_header_len)
1014                         max_hard_header_len = port->dev->hard_header_len;
1015         }
1016         rcu_read_unlock();
1017
1018         team->dev->vlan_features = vlan_features;
1019         team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL |
1020                                      NETIF_F_HW_VLAN_CTAG_TX |
1021                                      NETIF_F_HW_VLAN_STAG_TX;
1022         team->dev->hard_header_len = max_hard_header_len;
1023
1024         team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1025         if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1026                 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1027 }
1028
1029 static void team_compute_features(struct team *team)
1030 {
1031         __team_compute_features(team);
1032         netdev_change_features(team->dev);
1033 }
1034
1035 static int team_port_enter(struct team *team, struct team_port *port)
1036 {
1037         int err = 0;
1038
1039         dev_hold(team->dev);
1040         if (team->ops.port_enter) {
1041                 err = team->ops.port_enter(team, port);
1042                 if (err) {
1043                         netdev_err(team->dev, "Device %s failed to enter team mode\n",
1044                                    port->dev->name);
1045                         goto err_port_enter;
1046                 }
1047         }
1048
1049         return 0;
1050
1051 err_port_enter:
1052         dev_put(team->dev);
1053
1054         return err;
1055 }
1056
1057 static void team_port_leave(struct team *team, struct team_port *port)
1058 {
1059         if (team->ops.port_leave)
1060                 team->ops.port_leave(team, port);
1061         dev_put(team->dev);
1062 }
1063
1064 #ifdef CONFIG_NET_POLL_CONTROLLER
1065 static int __team_port_enable_netpoll(struct team_port *port)
1066 {
1067         struct netpoll *np;
1068         int err;
1069
1070         np = kzalloc(sizeof(*np), GFP_KERNEL);
1071         if (!np)
1072                 return -ENOMEM;
1073
1074         err = __netpoll_setup(np, port->dev);
1075         if (err) {
1076                 kfree(np);
1077                 return err;
1078         }
1079         port->np = np;
1080         return err;
1081 }
1082
1083 static int team_port_enable_netpoll(struct team_port *port)
1084 {
1085         if (!port->team->dev->npinfo)
1086                 return 0;
1087
1088         return __team_port_enable_netpoll(port);
1089 }
1090
1091 static void team_port_disable_netpoll(struct team_port *port)
1092 {
1093         struct netpoll *np = port->np;
1094
1095         if (!np)
1096                 return;
1097         port->np = NULL;
1098
1099         __netpoll_free(np);
1100 }
1101 #else
1102 static int team_port_enable_netpoll(struct team_port *port)
1103 {
1104         return 0;
1105 }
1106 static void team_port_disable_netpoll(struct team_port *port)
1107 {
1108 }
1109 #endif
1110
1111 static int team_upper_dev_link(struct team *team, struct team_port *port,
1112                                struct netlink_ext_ack *extack)
1113 {
1114         struct netdev_lag_upper_info lag_upper_info;
1115         int err;
1116
1117         lag_upper_info.tx_type = team->mode->lag_tx_type;
1118         lag_upper_info.hash_type = NETDEV_LAG_HASH_UNKNOWN;
1119         err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1120                                            &lag_upper_info, extack);
1121         if (err)
1122                 return err;
1123         port->dev->priv_flags |= IFF_TEAM_PORT;
1124         return 0;
1125 }
1126
1127 static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1128 {
1129         netdev_upper_dev_unlink(port->dev, team->dev);
1130         port->dev->priv_flags &= ~IFF_TEAM_PORT;
1131 }
1132
1133 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1134 static int team_dev_type_check_change(struct net_device *dev,
1135                                       struct net_device *port_dev);
1136
1137 static int team_port_add(struct team *team, struct net_device *port_dev,
1138                          struct netlink_ext_ack *extack)
1139 {
1140         struct net_device *dev = team->dev;
1141         struct team_port *port;
1142         char *portname = port_dev->name;
1143         int err;
1144
1145         if (port_dev->flags & IFF_LOOPBACK) {
1146                 NL_SET_ERR_MSG(extack, "Loopback device can't be added as a team port");
1147                 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1148                            portname);
1149                 return -EINVAL;
1150         }
1151
1152         if (netif_is_team_port(port_dev)) {
1153                 NL_SET_ERR_MSG(extack, "Device is already a port of a team device");
1154                 netdev_err(dev, "Device %s is already a port "
1155                                 "of a team device\n", portname);
1156                 return -EBUSY;
1157         }
1158
1159         if (dev == port_dev) {
1160                 NL_SET_ERR_MSG(extack, "Cannot enslave team device to itself");
1161                 netdev_err(dev, "Cannot enslave team device to itself\n");
1162                 return -EINVAL;
1163         }
1164
1165         if (netdev_has_upper_dev(dev, port_dev)) {
1166                 NL_SET_ERR_MSG(extack, "Device is already an upper device of the team interface");
1167                 netdev_err(dev, "Device %s is already an upper device of the team interface\n",
1168                            portname);
1169                 return -EBUSY;
1170         }
1171
1172         if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1173             vlan_uses_dev(dev)) {
1174                 NL_SET_ERR_MSG(extack, "Device is VLAN challenged and team device has VLAN set up");
1175                 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1176                            portname);
1177                 return -EPERM;
1178         }
1179
1180         err = team_dev_type_check_change(dev, port_dev);
1181         if (err)
1182                 return err;
1183
1184         if (port_dev->flags & IFF_UP) {
1185                 NL_SET_ERR_MSG(extack, "Device is up. Set it down before adding it as a team port");
1186                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1187                            portname);
1188                 return -EBUSY;
1189         }
1190
1191         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1192                        GFP_KERNEL);
1193         if (!port)
1194                 return -ENOMEM;
1195
1196         port->dev = port_dev;
1197         port->team = team;
1198         INIT_LIST_HEAD(&port->qom_list);
1199
1200         port->orig.mtu = port_dev->mtu;
1201         err = dev_set_mtu(port_dev, dev->mtu);
1202         if (err) {
1203                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1204                 goto err_set_mtu;
1205         }
1206
1207         memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1208
1209         err = team_port_enter(team, port);
1210         if (err) {
1211                 netdev_err(dev, "Device %s failed to enter team mode\n",
1212                            portname);
1213                 goto err_port_enter;
1214         }
1215
1216         err = dev_open(port_dev, extack);
1217         if (err) {
1218                 netdev_dbg(dev, "Device %s opening failed\n",
1219                            portname);
1220                 goto err_dev_open;
1221         }
1222
1223         err = vlan_vids_add_by_dev(port_dev, dev);
1224         if (err) {
1225                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1226                                 portname);
1227                 goto err_vids_add;
1228         }
1229
1230         err = team_port_enable_netpoll(port);
1231         if (err) {
1232                 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1233                            portname);
1234                 goto err_enable_netpoll;
1235         }
1236
1237         if (!(dev->features & NETIF_F_LRO))
1238                 dev_disable_lro(port_dev);
1239
1240         err = netdev_rx_handler_register(port_dev, team_handle_frame,
1241                                          port);
1242         if (err) {
1243                 netdev_err(dev, "Device %s failed to register rx_handler\n",
1244                            portname);
1245                 goto err_handler_register;
1246         }
1247
1248         err = team_upper_dev_link(team, port, extack);
1249         if (err) {
1250                 netdev_err(dev, "Device %s failed to set upper link\n",
1251                            portname);
1252                 goto err_set_upper_link;
1253         }
1254
1255         err = __team_option_inst_add_port(team, port);
1256         if (err) {
1257                 netdev_err(dev, "Device %s failed to add per-port options\n",
1258                            portname);
1259                 goto err_option_port_add;
1260         }
1261
1262         /* set promiscuity level to new slave */
1263         if (dev->flags & IFF_PROMISC) {
1264                 err = dev_set_promiscuity(port_dev, 1);
1265                 if (err)
1266                         goto err_set_slave_promisc;
1267         }
1268
1269         /* set allmulti level to new slave */
1270         if (dev->flags & IFF_ALLMULTI) {
1271                 err = dev_set_allmulti(port_dev, 1);
1272                 if (err) {
1273                         if (dev->flags & IFF_PROMISC)
1274                                 dev_set_promiscuity(port_dev, -1);
1275                         goto err_set_slave_promisc;
1276                 }
1277         }
1278
1279         if (dev->flags & IFF_UP) {
1280                 netif_addr_lock_bh(dev);
1281                 dev_uc_sync_multiple(port_dev, dev);
1282                 dev_mc_sync_multiple(port_dev, dev);
1283                 netif_addr_unlock_bh(dev);
1284         }
1285
1286         port->index = -1;
1287         list_add_tail_rcu(&port->list, &team->port_list);
1288         team_port_enable(team, port);
1289         __team_compute_features(team);
1290         __team_port_change_port_added(port, !!netif_oper_up(port_dev));
1291         __team_options_change_check(team);
1292
1293         netdev_info(dev, "Port device %s added\n", portname);
1294
1295         return 0;
1296
1297 err_set_slave_promisc:
1298         __team_option_inst_del_port(team, port);
1299
1300 err_option_port_add:
1301         team_upper_dev_unlink(team, port);
1302
1303 err_set_upper_link:
1304         netdev_rx_handler_unregister(port_dev);
1305
1306 err_handler_register:
1307         team_port_disable_netpoll(port);
1308
1309 err_enable_netpoll:
1310         vlan_vids_del_by_dev(port_dev, dev);
1311
1312 err_vids_add:
1313         dev_close(port_dev);
1314
1315 err_dev_open:
1316         team_port_leave(team, port);
1317         team_port_set_orig_dev_addr(port);
1318
1319 err_port_enter:
1320         dev_set_mtu(port_dev, port->orig.mtu);
1321
1322 err_set_mtu:
1323         kfree(port);
1324
1325         return err;
1326 }
1327
1328 static void __team_port_change_port_removed(struct team_port *port);
1329
1330 static int team_port_del(struct team *team, struct net_device *port_dev)
1331 {
1332         struct net_device *dev = team->dev;
1333         struct team_port *port;
1334         char *portname = port_dev->name;
1335
1336         port = team_port_get_rtnl(port_dev);
1337         if (!port || !team_port_find(team, port)) {
1338                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1339                            portname);
1340                 return -ENOENT;
1341         }
1342
1343         team_port_disable(team, port);
1344         list_del_rcu(&port->list);
1345
1346         if (dev->flags & IFF_PROMISC)
1347                 dev_set_promiscuity(port_dev, -1);
1348         if (dev->flags & IFF_ALLMULTI)
1349                 dev_set_allmulti(port_dev, -1);
1350
1351         team_upper_dev_unlink(team, port);
1352         netdev_rx_handler_unregister(port_dev);
1353         team_port_disable_netpoll(port);
1354         vlan_vids_del_by_dev(port_dev, dev);
1355         if (dev->flags & IFF_UP) {
1356                 dev_uc_unsync(port_dev, dev);
1357                 dev_mc_unsync(port_dev, dev);
1358         }
1359         dev_close(port_dev);
1360         team_port_leave(team, port);
1361
1362         __team_option_inst_mark_removed_port(team, port);
1363         __team_options_change_check(team);
1364         __team_option_inst_del_port(team, port);
1365         __team_port_change_port_removed(port);
1366
1367         team_port_set_orig_dev_addr(port);
1368         dev_set_mtu(port_dev, port->orig.mtu);
1369         kfree_rcu(port, rcu);
1370         netdev_info(dev, "Port device %s removed\n", portname);
1371         __team_compute_features(team);
1372
1373         return 0;
1374 }
1375
1376
1377 /*****************
1378  * Net device ops
1379  *****************/
1380
1381 static void team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1382 {
1383         ctx->data.str_val = team->mode->kind;
1384 }
1385
1386 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1387 {
1388         return team_change_mode(team, ctx->data.str_val);
1389 }
1390
1391 static void team_notify_peers_count_get(struct team *team,
1392                                         struct team_gsetter_ctx *ctx)
1393 {
1394         ctx->data.u32_val = team->notify_peers.count;
1395 }
1396
1397 static int team_notify_peers_count_set(struct team *team,
1398                                        struct team_gsetter_ctx *ctx)
1399 {
1400         team->notify_peers.count = ctx->data.u32_val;
1401         return 0;
1402 }
1403
1404 static void team_notify_peers_interval_get(struct team *team,
1405                                            struct team_gsetter_ctx *ctx)
1406 {
1407         ctx->data.u32_val = team->notify_peers.interval;
1408 }
1409
1410 static int team_notify_peers_interval_set(struct team *team,
1411                                           struct team_gsetter_ctx *ctx)
1412 {
1413         team->notify_peers.interval = ctx->data.u32_val;
1414         return 0;
1415 }
1416
1417 static void team_mcast_rejoin_count_get(struct team *team,
1418                                         struct team_gsetter_ctx *ctx)
1419 {
1420         ctx->data.u32_val = team->mcast_rejoin.count;
1421 }
1422
1423 static int team_mcast_rejoin_count_set(struct team *team,
1424                                        struct team_gsetter_ctx *ctx)
1425 {
1426         team->mcast_rejoin.count = ctx->data.u32_val;
1427         return 0;
1428 }
1429
1430 static void team_mcast_rejoin_interval_get(struct team *team,
1431                                            struct team_gsetter_ctx *ctx)
1432 {
1433         ctx->data.u32_val = team->mcast_rejoin.interval;
1434 }
1435
1436 static int team_mcast_rejoin_interval_set(struct team *team,
1437                                           struct team_gsetter_ctx *ctx)
1438 {
1439         team->mcast_rejoin.interval = ctx->data.u32_val;
1440         return 0;
1441 }
1442
1443 static void team_port_en_option_get(struct team *team,
1444                                     struct team_gsetter_ctx *ctx)
1445 {
1446         struct team_port *port = ctx->info->port;
1447
1448         ctx->data.bool_val = team_port_enabled(port);
1449 }
1450
1451 static int team_port_en_option_set(struct team *team,
1452                                    struct team_gsetter_ctx *ctx)
1453 {
1454         struct team_port *port = ctx->info->port;
1455
1456         if (ctx->data.bool_val)
1457                 team_port_enable(team, port);
1458         else
1459                 team_port_disable(team, port);
1460         return 0;
1461 }
1462
1463 static void team_user_linkup_option_get(struct team *team,
1464                                         struct team_gsetter_ctx *ctx)
1465 {
1466         struct team_port *port = ctx->info->port;
1467
1468         ctx->data.bool_val = port->user.linkup;
1469 }
1470
1471 static void __team_carrier_check(struct team *team);
1472
1473 static int team_user_linkup_option_set(struct team *team,
1474                                        struct team_gsetter_ctx *ctx)
1475 {
1476         struct team_port *port = ctx->info->port;
1477
1478         port->user.linkup = ctx->data.bool_val;
1479         team_refresh_port_linkup(port);
1480         __team_carrier_check(port->team);
1481         return 0;
1482 }
1483
1484 static void team_user_linkup_en_option_get(struct team *team,
1485                                            struct team_gsetter_ctx *ctx)
1486 {
1487         struct team_port *port = ctx->info->port;
1488
1489         ctx->data.bool_val = port->user.linkup_enabled;
1490 }
1491
1492 static int team_user_linkup_en_option_set(struct team *team,
1493                                           struct team_gsetter_ctx *ctx)
1494 {
1495         struct team_port *port = ctx->info->port;
1496
1497         port->user.linkup_enabled = ctx->data.bool_val;
1498         team_refresh_port_linkup(port);
1499         __team_carrier_check(port->team);
1500         return 0;
1501 }
1502
1503 static void team_priority_option_get(struct team *team,
1504                                      struct team_gsetter_ctx *ctx)
1505 {
1506         struct team_port *port = ctx->info->port;
1507
1508         ctx->data.s32_val = port->priority;
1509 }
1510
1511 static int team_priority_option_set(struct team *team,
1512                                     struct team_gsetter_ctx *ctx)
1513 {
1514         struct team_port *port = ctx->info->port;
1515         s32 priority = ctx->data.s32_val;
1516
1517         if (port->priority == priority)
1518                 return 0;
1519         port->priority = priority;
1520         team_queue_override_port_prio_changed(team, port);
1521         return 0;
1522 }
1523
1524 static void team_queue_id_option_get(struct team *team,
1525                                      struct team_gsetter_ctx *ctx)
1526 {
1527         struct team_port *port = ctx->info->port;
1528
1529         ctx->data.u32_val = port->queue_id;
1530 }
1531
1532 static int team_queue_id_option_set(struct team *team,
1533                                     struct team_gsetter_ctx *ctx)
1534 {
1535         struct team_port *port = ctx->info->port;
1536         u16 new_queue_id = ctx->data.u32_val;
1537
1538         if (port->queue_id == new_queue_id)
1539                 return 0;
1540         if (new_queue_id >= team->dev->real_num_tx_queues)
1541                 return -EINVAL;
1542         team_queue_override_port_change_queue_id(team, port, new_queue_id);
1543         return 0;
1544 }
1545
1546 static const struct team_option team_options[] = {
1547         {
1548                 .name = "mode",
1549                 .type = TEAM_OPTION_TYPE_STRING,
1550                 .getter = team_mode_option_get,
1551                 .setter = team_mode_option_set,
1552         },
1553         {
1554                 .name = "notify_peers_count",
1555                 .type = TEAM_OPTION_TYPE_U32,
1556                 .getter = team_notify_peers_count_get,
1557                 .setter = team_notify_peers_count_set,
1558         },
1559         {
1560                 .name = "notify_peers_interval",
1561                 .type = TEAM_OPTION_TYPE_U32,
1562                 .getter = team_notify_peers_interval_get,
1563                 .setter = team_notify_peers_interval_set,
1564         },
1565         {
1566                 .name = "mcast_rejoin_count",
1567                 .type = TEAM_OPTION_TYPE_U32,
1568                 .getter = team_mcast_rejoin_count_get,
1569                 .setter = team_mcast_rejoin_count_set,
1570         },
1571         {
1572                 .name = "mcast_rejoin_interval",
1573                 .type = TEAM_OPTION_TYPE_U32,
1574                 .getter = team_mcast_rejoin_interval_get,
1575                 .setter = team_mcast_rejoin_interval_set,
1576         },
1577         {
1578                 .name = "enabled",
1579                 .type = TEAM_OPTION_TYPE_BOOL,
1580                 .per_port = true,
1581                 .getter = team_port_en_option_get,
1582                 .setter = team_port_en_option_set,
1583         },
1584         {
1585                 .name = "user_linkup",
1586                 .type = TEAM_OPTION_TYPE_BOOL,
1587                 .per_port = true,
1588                 .getter = team_user_linkup_option_get,
1589                 .setter = team_user_linkup_option_set,
1590         },
1591         {
1592                 .name = "user_linkup_enabled",
1593                 .type = TEAM_OPTION_TYPE_BOOL,
1594                 .per_port = true,
1595                 .getter = team_user_linkup_en_option_get,
1596                 .setter = team_user_linkup_en_option_set,
1597         },
1598         {
1599                 .name = "priority",
1600                 .type = TEAM_OPTION_TYPE_S32,
1601                 .per_port = true,
1602                 .getter = team_priority_option_get,
1603                 .setter = team_priority_option_set,
1604         },
1605         {
1606                 .name = "queue_id",
1607                 .type = TEAM_OPTION_TYPE_U32,
1608                 .per_port = true,
1609                 .getter = team_queue_id_option_get,
1610                 .setter = team_queue_id_option_set,
1611         },
1612 };
1613
1614
1615 static int team_init(struct net_device *dev)
1616 {
1617         struct team *team = netdev_priv(dev);
1618         int i;
1619         int err;
1620
1621         team->dev = dev;
1622         team_set_no_mode(team);
1623         team->notifier_ctx = false;
1624
1625         team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1626         if (!team->pcpu_stats)
1627                 return -ENOMEM;
1628
1629         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1630                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1631         INIT_LIST_HEAD(&team->port_list);
1632         err = team_queue_override_init(team);
1633         if (err)
1634                 goto err_team_queue_override_init;
1635
1636         team_adjust_ops(team);
1637
1638         INIT_LIST_HEAD(&team->option_list);
1639         INIT_LIST_HEAD(&team->option_inst_list);
1640
1641         team_notify_peers_init(team);
1642         team_mcast_rejoin_init(team);
1643
1644         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1645         if (err)
1646                 goto err_options_register;
1647         netif_carrier_off(dev);
1648
1649         lockdep_register_key(&team->team_lock_key);
1650         __mutex_init(&team->lock, "team->team_lock_key", &team->team_lock_key);
1651         netdev_lockdep_set_classes(dev);
1652
1653         return 0;
1654
1655 err_options_register:
1656         team_mcast_rejoin_fini(team);
1657         team_notify_peers_fini(team);
1658         team_queue_override_fini(team);
1659 err_team_queue_override_init:
1660         free_percpu(team->pcpu_stats);
1661
1662         return err;
1663 }
1664
1665 static void team_uninit(struct net_device *dev)
1666 {
1667         struct team *team = netdev_priv(dev);
1668         struct team_port *port;
1669         struct team_port *tmp;
1670
1671         mutex_lock(&team->lock);
1672         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1673                 team_port_del(team, port->dev);
1674
1675         __team_change_mode(team, NULL); /* cleanup */
1676         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1677         team_mcast_rejoin_fini(team);
1678         team_notify_peers_fini(team);
1679         team_queue_override_fini(team);
1680         mutex_unlock(&team->lock);
1681         netdev_change_features(dev);
1682         lockdep_unregister_key(&team->team_lock_key);
1683 }
1684
1685 static void team_destructor(struct net_device *dev)
1686 {
1687         struct team *team = netdev_priv(dev);
1688
1689         free_percpu(team->pcpu_stats);
1690 }
1691
1692 static int team_open(struct net_device *dev)
1693 {
1694         return 0;
1695 }
1696
1697 static int team_close(struct net_device *dev)
1698 {
1699         struct team *team = netdev_priv(dev);
1700         struct team_port *port;
1701
1702         list_for_each_entry(port, &team->port_list, list) {
1703                 dev_uc_unsync(port->dev, dev);
1704                 dev_mc_unsync(port->dev, dev);
1705         }
1706
1707         return 0;
1708 }
1709
1710 /*
1711  * note: already called with rcu_read_lock
1712  */
1713 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1714 {
1715         struct team *team = netdev_priv(dev);
1716         bool tx_success;
1717         unsigned int len = skb->len;
1718
1719         tx_success = team_queue_override_transmit(team, skb);
1720         if (!tx_success)
1721                 tx_success = team->ops.transmit(team, skb);
1722         if (tx_success) {
1723                 struct team_pcpu_stats *pcpu_stats;
1724
1725                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1726                 u64_stats_update_begin(&pcpu_stats->syncp);
1727                 u64_stats_inc(&pcpu_stats->tx_packets);
1728                 u64_stats_add(&pcpu_stats->tx_bytes, len);
1729                 u64_stats_update_end(&pcpu_stats->syncp);
1730         } else {
1731                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1732         }
1733
1734         return NETDEV_TX_OK;
1735 }
1736
1737 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1738                              struct net_device *sb_dev)
1739 {
1740         /*
1741          * This helper function exists to help dev_pick_tx get the correct
1742          * destination queue.  Using a helper function skips a call to
1743          * skb_tx_hash and will put the skbs in the queue we expect on their
1744          * way down to the team driver.
1745          */
1746         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1747
1748         /*
1749          * Save the original txq to restore before passing to the driver
1750          */
1751         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1752
1753         if (unlikely(txq >= dev->real_num_tx_queues)) {
1754                 do {
1755                         txq -= dev->real_num_tx_queues;
1756                 } while (txq >= dev->real_num_tx_queues);
1757         }
1758         return txq;
1759 }
1760
1761 static void team_change_rx_flags(struct net_device *dev, int change)
1762 {
1763         struct team *team = netdev_priv(dev);
1764         struct team_port *port;
1765         int inc;
1766
1767         rcu_read_lock();
1768         list_for_each_entry_rcu(port, &team->port_list, list) {
1769                 if (change & IFF_PROMISC) {
1770                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1771                         dev_set_promiscuity(port->dev, inc);
1772                 }
1773                 if (change & IFF_ALLMULTI) {
1774                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1775                         dev_set_allmulti(port->dev, inc);
1776                 }
1777         }
1778         rcu_read_unlock();
1779 }
1780
1781 static void team_set_rx_mode(struct net_device *dev)
1782 {
1783         struct team *team = netdev_priv(dev);
1784         struct team_port *port;
1785
1786         rcu_read_lock();
1787         list_for_each_entry_rcu(port, &team->port_list, list) {
1788                 dev_uc_sync_multiple(port->dev, dev);
1789                 dev_mc_sync_multiple(port->dev, dev);
1790         }
1791         rcu_read_unlock();
1792 }
1793
1794 static int team_set_mac_address(struct net_device *dev, void *p)
1795 {
1796         struct sockaddr *addr = p;
1797         struct team *team = netdev_priv(dev);
1798         struct team_port *port;
1799
1800         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1801                 return -EADDRNOTAVAIL;
1802         dev_addr_set(dev, addr->sa_data);
1803         mutex_lock(&team->lock);
1804         list_for_each_entry(port, &team->port_list, list)
1805                 if (team->ops.port_change_dev_addr)
1806                         team->ops.port_change_dev_addr(team, port);
1807         mutex_unlock(&team->lock);
1808         return 0;
1809 }
1810
1811 static int team_change_mtu(struct net_device *dev, int new_mtu)
1812 {
1813         struct team *team = netdev_priv(dev);
1814         struct team_port *port;
1815         int err;
1816
1817         /*
1818          * Alhough this is reader, it's guarded by team lock. It's not possible
1819          * to traverse list in reverse under rcu_read_lock
1820          */
1821         mutex_lock(&team->lock);
1822         team->port_mtu_change_allowed = true;
1823         list_for_each_entry(port, &team->port_list, list) {
1824                 err = dev_set_mtu(port->dev, new_mtu);
1825                 if (err) {
1826                         netdev_err(dev, "Device %s failed to change mtu",
1827                                    port->dev->name);
1828                         goto unwind;
1829                 }
1830         }
1831         team->port_mtu_change_allowed = false;
1832         mutex_unlock(&team->lock);
1833
1834         WRITE_ONCE(dev->mtu, new_mtu);
1835
1836         return 0;
1837
1838 unwind:
1839         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1840                 dev_set_mtu(port->dev, dev->mtu);
1841         team->port_mtu_change_allowed = false;
1842         mutex_unlock(&team->lock);
1843
1844         return err;
1845 }
1846
1847 static void
1848 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1849 {
1850         struct team *team = netdev_priv(dev);
1851         struct team_pcpu_stats *p;
1852         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1853         u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1854         unsigned int start;
1855         int i;
1856
1857         for_each_possible_cpu(i) {
1858                 p = per_cpu_ptr(team->pcpu_stats, i);
1859                 do {
1860                         start = u64_stats_fetch_begin(&p->syncp);
1861                         rx_packets      = u64_stats_read(&p->rx_packets);
1862                         rx_bytes        = u64_stats_read(&p->rx_bytes);
1863                         rx_multicast    = u64_stats_read(&p->rx_multicast);
1864                         tx_packets      = u64_stats_read(&p->tx_packets);
1865                         tx_bytes        = u64_stats_read(&p->tx_bytes);
1866                 } while (u64_stats_fetch_retry(&p->syncp, start));
1867
1868                 stats->rx_packets       += rx_packets;
1869                 stats->rx_bytes         += rx_bytes;
1870                 stats->multicast        += rx_multicast;
1871                 stats->tx_packets       += tx_packets;
1872                 stats->tx_bytes         += tx_bytes;
1873                 /*
1874                  * rx_dropped, tx_dropped & rx_nohandler are u32,
1875                  * updated without syncp protection.
1876                  */
1877                 rx_dropped      += READ_ONCE(p->rx_dropped);
1878                 tx_dropped      += READ_ONCE(p->tx_dropped);
1879                 rx_nohandler    += READ_ONCE(p->rx_nohandler);
1880         }
1881         stats->rx_dropped       = rx_dropped;
1882         stats->tx_dropped       = tx_dropped;
1883         stats->rx_nohandler     = rx_nohandler;
1884 }
1885
1886 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1887 {
1888         struct team *team = netdev_priv(dev);
1889         struct team_port *port;
1890         int err;
1891
1892         /*
1893          * Alhough this is reader, it's guarded by team lock. It's not possible
1894          * to traverse list in reverse under rcu_read_lock
1895          */
1896         mutex_lock(&team->lock);
1897         list_for_each_entry(port, &team->port_list, list) {
1898                 err = vlan_vid_add(port->dev, proto, vid);
1899                 if (err)
1900                         goto unwind;
1901         }
1902         mutex_unlock(&team->lock);
1903
1904         return 0;
1905
1906 unwind:
1907         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1908                 vlan_vid_del(port->dev, proto, vid);
1909         mutex_unlock(&team->lock);
1910
1911         return err;
1912 }
1913
1914 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1915 {
1916         struct team *team = netdev_priv(dev);
1917         struct team_port *port;
1918
1919         mutex_lock(&team->lock);
1920         list_for_each_entry(port, &team->port_list, list)
1921                 vlan_vid_del(port->dev, proto, vid);
1922         mutex_unlock(&team->lock);
1923
1924         return 0;
1925 }
1926
1927 #ifdef CONFIG_NET_POLL_CONTROLLER
1928 static void team_poll_controller(struct net_device *dev)
1929 {
1930 }
1931
1932 static void __team_netpoll_cleanup(struct team *team)
1933 {
1934         struct team_port *port;
1935
1936         list_for_each_entry(port, &team->port_list, list)
1937                 team_port_disable_netpoll(port);
1938 }
1939
1940 static void team_netpoll_cleanup(struct net_device *dev)
1941 {
1942         struct team *team = netdev_priv(dev);
1943
1944         mutex_lock(&team->lock);
1945         __team_netpoll_cleanup(team);
1946         mutex_unlock(&team->lock);
1947 }
1948
1949 static int team_netpoll_setup(struct net_device *dev,
1950                               struct netpoll_info *npifo)
1951 {
1952         struct team *team = netdev_priv(dev);
1953         struct team_port *port;
1954         int err = 0;
1955
1956         mutex_lock(&team->lock);
1957         list_for_each_entry(port, &team->port_list, list) {
1958                 err = __team_port_enable_netpoll(port);
1959                 if (err) {
1960                         __team_netpoll_cleanup(team);
1961                         break;
1962                 }
1963         }
1964         mutex_unlock(&team->lock);
1965         return err;
1966 }
1967 #endif
1968
1969 static int team_add_slave(struct net_device *dev, struct net_device *port_dev,
1970                           struct netlink_ext_ack *extack)
1971 {
1972         struct team *team = netdev_priv(dev);
1973         int err;
1974
1975         mutex_lock(&team->lock);
1976         err = team_port_add(team, port_dev, extack);
1977         mutex_unlock(&team->lock);
1978
1979         if (!err)
1980                 netdev_change_features(dev);
1981
1982         return err;
1983 }
1984
1985 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1986 {
1987         struct team *team = netdev_priv(dev);
1988         int err;
1989
1990         mutex_lock(&team->lock);
1991         err = team_port_del(team, port_dev);
1992         mutex_unlock(&team->lock);
1993
1994         if (err)
1995                 return err;
1996
1997         if (netif_is_team_master(port_dev)) {
1998                 lockdep_unregister_key(&team->team_lock_key);
1999                 lockdep_register_key(&team->team_lock_key);
2000                 lockdep_set_class(&team->lock, &team->team_lock_key);
2001         }
2002         netdev_change_features(dev);
2003
2004         return err;
2005 }
2006
2007 static netdev_features_t team_fix_features(struct net_device *dev,
2008                                            netdev_features_t features)
2009 {
2010         struct team_port *port;
2011         struct team *team = netdev_priv(dev);
2012         netdev_features_t mask;
2013
2014         mask = features;
2015         features &= ~NETIF_F_ONE_FOR_ALL;
2016         features |= NETIF_F_ALL_FOR_ALL;
2017
2018         rcu_read_lock();
2019         list_for_each_entry_rcu(port, &team->port_list, list) {
2020                 features = netdev_increment_features(features,
2021                                                      port->dev->features,
2022                                                      mask);
2023         }
2024         rcu_read_unlock();
2025
2026         features = netdev_add_tso_features(features, mask);
2027
2028         return features;
2029 }
2030
2031 static int team_change_carrier(struct net_device *dev, bool new_carrier)
2032 {
2033         struct team *team = netdev_priv(dev);
2034
2035         team->user_carrier_enabled = true;
2036
2037         if (new_carrier)
2038                 netif_carrier_on(dev);
2039         else
2040                 netif_carrier_off(dev);
2041         return 0;
2042 }
2043
2044 static const struct net_device_ops team_netdev_ops = {
2045         .ndo_init               = team_init,
2046         .ndo_uninit             = team_uninit,
2047         .ndo_open               = team_open,
2048         .ndo_stop               = team_close,
2049         .ndo_start_xmit         = team_xmit,
2050         .ndo_select_queue       = team_select_queue,
2051         .ndo_change_rx_flags    = team_change_rx_flags,
2052         .ndo_set_rx_mode        = team_set_rx_mode,
2053         .ndo_set_mac_address    = team_set_mac_address,
2054         .ndo_change_mtu         = team_change_mtu,
2055         .ndo_get_stats64        = team_get_stats64,
2056         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
2057         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
2058 #ifdef CONFIG_NET_POLL_CONTROLLER
2059         .ndo_poll_controller    = team_poll_controller,
2060         .ndo_netpoll_setup      = team_netpoll_setup,
2061         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
2062 #endif
2063         .ndo_add_slave          = team_add_slave,
2064         .ndo_del_slave          = team_del_slave,
2065         .ndo_fix_features       = team_fix_features,
2066         .ndo_change_carrier     = team_change_carrier,
2067         .ndo_features_check     = passthru_features_check,
2068 };
2069
2070 /***********************
2071  * ethtool interface
2072  ***********************/
2073
2074 static void team_ethtool_get_drvinfo(struct net_device *dev,
2075                                      struct ethtool_drvinfo *drvinfo)
2076 {
2077         strscpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2078 }
2079
2080 static int team_ethtool_get_link_ksettings(struct net_device *dev,
2081                                            struct ethtool_link_ksettings *cmd)
2082 {
2083         struct team *team= netdev_priv(dev);
2084         unsigned long speed = 0;
2085         struct team_port *port;
2086
2087         cmd->base.duplex = DUPLEX_UNKNOWN;
2088         cmd->base.port = PORT_OTHER;
2089
2090         rcu_read_lock();
2091         list_for_each_entry_rcu(port, &team->port_list, list) {
2092                 if (team_port_txable(port)) {
2093                         if (port->state.speed != SPEED_UNKNOWN)
2094                                 speed += port->state.speed;
2095                         if (cmd->base.duplex == DUPLEX_UNKNOWN &&
2096                             port->state.duplex != DUPLEX_UNKNOWN)
2097                                 cmd->base.duplex = port->state.duplex;
2098                 }
2099         }
2100         rcu_read_unlock();
2101
2102         cmd->base.speed = speed ? : SPEED_UNKNOWN;
2103
2104         return 0;
2105 }
2106
2107 static const struct ethtool_ops team_ethtool_ops = {
2108         .get_drvinfo            = team_ethtool_get_drvinfo,
2109         .get_link               = ethtool_op_get_link,
2110         .get_link_ksettings     = team_ethtool_get_link_ksettings,
2111 };
2112
2113 /***********************
2114  * rt netlink interface
2115  ***********************/
2116
2117 static void team_setup_by_port(struct net_device *dev,
2118                                struct net_device *port_dev)
2119 {
2120         struct team *team = netdev_priv(dev);
2121
2122         if (port_dev->type == ARPHRD_ETHER)
2123                 dev->header_ops = team->header_ops_cache;
2124         else
2125                 dev->header_ops = port_dev->header_ops;
2126         dev->type = port_dev->type;
2127         dev->hard_header_len = port_dev->hard_header_len;
2128         dev->needed_headroom = port_dev->needed_headroom;
2129         dev->addr_len = port_dev->addr_len;
2130         dev->mtu = port_dev->mtu;
2131         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2132         eth_hw_addr_inherit(dev, port_dev);
2133
2134         if (port_dev->flags & IFF_POINTOPOINT) {
2135                 dev->flags &= ~(IFF_BROADCAST | IFF_MULTICAST);
2136                 dev->flags |= (IFF_POINTOPOINT | IFF_NOARP);
2137         } else if ((port_dev->flags & (IFF_BROADCAST | IFF_MULTICAST)) ==
2138                     (IFF_BROADCAST | IFF_MULTICAST)) {
2139                 dev->flags |= (IFF_BROADCAST | IFF_MULTICAST);
2140                 dev->flags &= ~(IFF_POINTOPOINT | IFF_NOARP);
2141         }
2142 }
2143
2144 static int team_dev_type_check_change(struct net_device *dev,
2145                                       struct net_device *port_dev)
2146 {
2147         struct team *team = netdev_priv(dev);
2148         char *portname = port_dev->name;
2149         int err;
2150
2151         if (dev->type == port_dev->type)
2152                 return 0;
2153         if (!list_empty(&team->port_list)) {
2154                 netdev_err(dev, "Device %s is of different type\n", portname);
2155                 return -EBUSY;
2156         }
2157         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2158         err = notifier_to_errno(err);
2159         if (err) {
2160                 netdev_err(dev, "Refused to change device type\n");
2161                 return err;
2162         }
2163         dev_uc_flush(dev);
2164         dev_mc_flush(dev);
2165         team_setup_by_port(dev, port_dev);
2166         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2167         return 0;
2168 }
2169
2170 static void team_setup(struct net_device *dev)
2171 {
2172         struct team *team = netdev_priv(dev);
2173
2174         ether_setup(dev);
2175         dev->max_mtu = ETH_MAX_MTU;
2176         team->header_ops_cache = dev->header_ops;
2177
2178         dev->netdev_ops = &team_netdev_ops;
2179         dev->ethtool_ops = &team_ethtool_ops;
2180         dev->needs_free_netdev = true;
2181         dev->priv_destructor = team_destructor;
2182         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2183         dev->priv_flags |= IFF_NO_QUEUE;
2184         dev->priv_flags |= IFF_TEAM;
2185
2186         /*
2187          * Indicate we support unicast address filtering. That way core won't
2188          * bring us to promisc mode in case a unicast addr is added.
2189          * Let this up to underlay drivers.
2190          */
2191         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2192
2193         dev->features |= NETIF_F_LLTX;
2194         dev->features |= NETIF_F_GRO;
2195
2196         /* Don't allow team devices to change network namespaces. */
2197         dev->features |= NETIF_F_NETNS_LOCAL;
2198
2199         dev->hw_features = TEAM_VLAN_FEATURES |
2200                            NETIF_F_HW_VLAN_CTAG_RX |
2201                            NETIF_F_HW_VLAN_CTAG_FILTER |
2202                            NETIF_F_HW_VLAN_STAG_RX |
2203                            NETIF_F_HW_VLAN_STAG_FILTER;
2204
2205         dev->hw_features |= NETIF_F_GSO_ENCAP_ALL;
2206         dev->features |= dev->hw_features;
2207         dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
2208 }
2209
2210 static int team_newlink(struct net *src_net, struct net_device *dev,
2211                         struct nlattr *tb[], struct nlattr *data[],
2212                         struct netlink_ext_ack *extack)
2213 {
2214         if (tb[IFLA_ADDRESS] == NULL)
2215                 eth_hw_addr_random(dev);
2216
2217         return register_netdevice(dev);
2218 }
2219
2220 static int team_validate(struct nlattr *tb[], struct nlattr *data[],
2221                          struct netlink_ext_ack *extack)
2222 {
2223         if (tb[IFLA_ADDRESS]) {
2224                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2225                         return -EINVAL;
2226                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2227                         return -EADDRNOTAVAIL;
2228         }
2229         return 0;
2230 }
2231
2232 static unsigned int team_get_num_tx_queues(void)
2233 {
2234         return TEAM_DEFAULT_NUM_TX_QUEUES;
2235 }
2236
2237 static unsigned int team_get_num_rx_queues(void)
2238 {
2239         return TEAM_DEFAULT_NUM_RX_QUEUES;
2240 }
2241
2242 static struct rtnl_link_ops team_link_ops __read_mostly = {
2243         .kind                   = DRV_NAME,
2244         .priv_size              = sizeof(struct team),
2245         .setup                  = team_setup,
2246         .newlink                = team_newlink,
2247         .validate               = team_validate,
2248         .get_num_tx_queues      = team_get_num_tx_queues,
2249         .get_num_rx_queues      = team_get_num_rx_queues,
2250 };
2251
2252
2253 /***********************************
2254  * Generic netlink custom interface
2255  ***********************************/
2256
2257 static struct genl_family team_nl_family;
2258
2259 int team_nl_noop_doit(struct sk_buff *skb, struct genl_info *info)
2260 {
2261         struct sk_buff *msg;
2262         void *hdr;
2263         int err;
2264
2265         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2266         if (!msg)
2267                 return -ENOMEM;
2268
2269         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2270                           &team_nl_family, 0, TEAM_CMD_NOOP);
2271         if (!hdr) {
2272                 err = -EMSGSIZE;
2273                 goto err_msg_put;
2274         }
2275
2276         genlmsg_end(msg, hdr);
2277
2278         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2279
2280 err_msg_put:
2281         nlmsg_free(msg);
2282
2283         return err;
2284 }
2285
2286 /*
2287  * Netlink cmd functions should be locked by following two functions.
2288  * Since dev gets held here, that ensures dev won't disappear in between.
2289  */
2290 static struct team *team_nl_team_get(struct genl_info *info)
2291 {
2292         struct net *net = genl_info_net(info);
2293         int ifindex;
2294         struct net_device *dev;
2295         struct team *team;
2296
2297         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2298                 return NULL;
2299
2300         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2301         dev = dev_get_by_index(net, ifindex);
2302         if (!dev || dev->netdev_ops != &team_netdev_ops) {
2303                 dev_put(dev);
2304                 return NULL;
2305         }
2306
2307         team = netdev_priv(dev);
2308         mutex_lock(&team->lock);
2309         return team;
2310 }
2311
2312 static void team_nl_team_put(struct team *team)
2313 {
2314         mutex_unlock(&team->lock);
2315         dev_put(team->dev);
2316 }
2317
2318 typedef int team_nl_send_func_t(struct sk_buff *skb,
2319                                 struct team *team, u32 portid);
2320
2321 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2322 {
2323         return genlmsg_unicast(dev_net(team->dev), skb, portid);
2324 }
2325
2326 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2327                                        struct team_option_inst *opt_inst)
2328 {
2329         struct nlattr *option_item;
2330         struct team_option *option = opt_inst->option;
2331         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2332         struct team_gsetter_ctx ctx;
2333         int err;
2334
2335         ctx.info = opt_inst_info;
2336         err = team_option_get(team, opt_inst, &ctx);
2337         if (err)
2338                 return err;
2339
2340         option_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_OPTION);
2341         if (!option_item)
2342                 return -EMSGSIZE;
2343
2344         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2345                 goto nest_cancel;
2346         if (opt_inst_info->port &&
2347             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2348                         opt_inst_info->port->dev->ifindex))
2349                 goto nest_cancel;
2350         if (opt_inst->option->array_size &&
2351             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2352                         opt_inst_info->array_index))
2353                 goto nest_cancel;
2354
2355         switch (option->type) {
2356         case TEAM_OPTION_TYPE_U32:
2357                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2358                         goto nest_cancel;
2359                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2360                         goto nest_cancel;
2361                 break;
2362         case TEAM_OPTION_TYPE_STRING:
2363                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2364                         goto nest_cancel;
2365                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2366                                    ctx.data.str_val))
2367                         goto nest_cancel;
2368                 break;
2369         case TEAM_OPTION_TYPE_BINARY:
2370                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2371                         goto nest_cancel;
2372                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2373                             ctx.data.bin_val.ptr))
2374                         goto nest_cancel;
2375                 break;
2376         case TEAM_OPTION_TYPE_BOOL:
2377                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2378                         goto nest_cancel;
2379                 if (ctx.data.bool_val &&
2380                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2381                         goto nest_cancel;
2382                 break;
2383         case TEAM_OPTION_TYPE_S32:
2384                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2385                         goto nest_cancel;
2386                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2387                         goto nest_cancel;
2388                 break;
2389         default:
2390                 BUG();
2391         }
2392         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2393                 goto nest_cancel;
2394         if (opt_inst->changed) {
2395                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2396                         goto nest_cancel;
2397                 opt_inst->changed = false;
2398         }
2399         nla_nest_end(skb, option_item);
2400         return 0;
2401
2402 nest_cancel:
2403         nla_nest_cancel(skb, option_item);
2404         return -EMSGSIZE;
2405 }
2406
2407 static int __send_and_alloc_skb(struct sk_buff **pskb,
2408                                 struct team *team, u32 portid,
2409                                 team_nl_send_func_t *send_func)
2410 {
2411         int err;
2412
2413         if (*pskb) {
2414                 err = send_func(*pskb, team, portid);
2415                 if (err)
2416                         return err;
2417         }
2418         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2419         if (!*pskb)
2420                 return -ENOMEM;
2421         return 0;
2422 }
2423
2424 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2425                                     int flags, team_nl_send_func_t *send_func,
2426                                     struct list_head *sel_opt_inst_list)
2427 {
2428         struct nlattr *option_list;
2429         struct nlmsghdr *nlh;
2430         void *hdr;
2431         struct team_option_inst *opt_inst;
2432         int err;
2433         struct sk_buff *skb = NULL;
2434         bool incomplete;
2435         int i;
2436
2437         opt_inst = list_first_entry(sel_opt_inst_list,
2438                                     struct team_option_inst, tmp_list);
2439
2440 start_again:
2441         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2442         if (err)
2443                 return err;
2444
2445         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2446                           TEAM_CMD_OPTIONS_GET);
2447         if (!hdr) {
2448                 nlmsg_free(skb);
2449                 return -EMSGSIZE;
2450         }
2451
2452         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2453                 goto nla_put_failure;
2454         option_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_OPTION);
2455         if (!option_list)
2456                 goto nla_put_failure;
2457
2458         i = 0;
2459         incomplete = false;
2460         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2461                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2462                 if (err) {
2463                         if (err == -EMSGSIZE) {
2464                                 if (!i)
2465                                         goto errout;
2466                                 incomplete = true;
2467                                 break;
2468                         }
2469                         goto errout;
2470                 }
2471                 i++;
2472         }
2473
2474         nla_nest_end(skb, option_list);
2475         genlmsg_end(skb, hdr);
2476         if (incomplete)
2477                 goto start_again;
2478
2479 send_done:
2480         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2481         if (!nlh) {
2482                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2483                 if (err)
2484                         return err;
2485                 goto send_done;
2486         }
2487
2488         return send_func(skb, team, portid);
2489
2490 nla_put_failure:
2491         err = -EMSGSIZE;
2492 errout:
2493         nlmsg_free(skb);
2494         return err;
2495 }
2496
2497 int team_nl_options_get_doit(struct sk_buff *skb, struct genl_info *info)
2498 {
2499         struct team *team;
2500         struct team_option_inst *opt_inst;
2501         int err;
2502         LIST_HEAD(sel_opt_inst_list);
2503
2504         team = team_nl_team_get(info);
2505         if (!team)
2506                 return -EINVAL;
2507
2508         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2509                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2510         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2511                                        NLM_F_ACK, team_nl_send_unicast,
2512                                        &sel_opt_inst_list);
2513
2514         team_nl_team_put(team);
2515
2516         return err;
2517 }
2518
2519 static int team_nl_send_event_options_get(struct team *team,
2520                                           struct list_head *sel_opt_inst_list);
2521
2522 int team_nl_options_set_doit(struct sk_buff *skb, struct genl_info *info)
2523 {
2524         struct team *team;
2525         int err = 0;
2526         int i;
2527         struct nlattr *nl_option;
2528
2529         rtnl_lock();
2530
2531         team = team_nl_team_get(info);
2532         if (!team) {
2533                 err = -EINVAL;
2534                 goto rtnl_unlock;
2535         }
2536
2537         err = -EINVAL;
2538         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2539                 err = -EINVAL;
2540                 goto team_put;
2541         }
2542
2543         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2544                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2545                 struct nlattr *attr;
2546                 struct nlattr *attr_data;
2547                 LIST_HEAD(opt_inst_list);
2548                 enum team_option_type opt_type;
2549                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2550                 u32 opt_array_index = 0;
2551                 bool opt_is_array = false;
2552                 struct team_option_inst *opt_inst;
2553                 char *opt_name;
2554                 bool opt_found = false;
2555
2556                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2557                         err = -EINVAL;
2558                         goto team_put;
2559                 }
2560                 err = nla_parse_nested_deprecated(opt_attrs,
2561                                                   TEAM_ATTR_OPTION_MAX,
2562                                                   nl_option,
2563                                                   team_attr_option_nl_policy,
2564                                                   info->extack);
2565                 if (err)
2566                         goto team_put;
2567                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2568                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2569                         err = -EINVAL;
2570                         goto team_put;
2571                 }
2572                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2573                 case NLA_U32:
2574                         opt_type = TEAM_OPTION_TYPE_U32;
2575                         break;
2576                 case NLA_STRING:
2577                         opt_type = TEAM_OPTION_TYPE_STRING;
2578                         break;
2579                 case NLA_BINARY:
2580                         opt_type = TEAM_OPTION_TYPE_BINARY;
2581                         break;
2582                 case NLA_FLAG:
2583                         opt_type = TEAM_OPTION_TYPE_BOOL;
2584                         break;
2585                 case NLA_S32:
2586                         opt_type = TEAM_OPTION_TYPE_S32;
2587                         break;
2588                 default:
2589                         goto team_put;
2590                 }
2591
2592                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2593                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2594                         err = -EINVAL;
2595                         goto team_put;
2596                 }
2597
2598                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2599                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2600                 if (attr)
2601                         opt_port_ifindex = nla_get_u32(attr);
2602
2603                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2604                 if (attr) {
2605                         opt_is_array = true;
2606                         opt_array_index = nla_get_u32(attr);
2607                 }
2608
2609                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2610                         struct team_option *option = opt_inst->option;
2611                         struct team_gsetter_ctx ctx;
2612                         struct team_option_inst_info *opt_inst_info;
2613                         int tmp_ifindex;
2614
2615                         opt_inst_info = &opt_inst->info;
2616                         tmp_ifindex = opt_inst_info->port ?
2617                                       opt_inst_info->port->dev->ifindex : 0;
2618                         if (option->type != opt_type ||
2619                             strcmp(option->name, opt_name) ||
2620                             tmp_ifindex != opt_port_ifindex ||
2621                             (option->array_size && !opt_is_array) ||
2622                             opt_inst_info->array_index != opt_array_index)
2623                                 continue;
2624                         opt_found = true;
2625                         ctx.info = opt_inst_info;
2626                         switch (opt_type) {
2627                         case TEAM_OPTION_TYPE_U32:
2628                                 ctx.data.u32_val = nla_get_u32(attr_data);
2629                                 break;
2630                         case TEAM_OPTION_TYPE_STRING:
2631                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2632                                         err = -EINVAL;
2633                                         goto team_put;
2634                                 }
2635                                 ctx.data.str_val = nla_data(attr_data);
2636                                 break;
2637                         case TEAM_OPTION_TYPE_BINARY:
2638                                 ctx.data.bin_val.len = nla_len(attr_data);
2639                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2640                                 break;
2641                         case TEAM_OPTION_TYPE_BOOL:
2642                                 ctx.data.bool_val = attr_data ? true : false;
2643                                 break;
2644                         case TEAM_OPTION_TYPE_S32:
2645                                 ctx.data.s32_val = nla_get_s32(attr_data);
2646                                 break;
2647                         default:
2648                                 BUG();
2649                         }
2650                         err = team_option_set(team, opt_inst, &ctx);
2651                         if (err)
2652                                 goto team_put;
2653                         opt_inst->changed = true;
2654                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2655                 }
2656                 if (!opt_found) {
2657                         err = -ENOENT;
2658                         goto team_put;
2659                 }
2660
2661                 err = team_nl_send_event_options_get(team, &opt_inst_list);
2662                 if (err)
2663                         break;
2664         }
2665
2666 team_put:
2667         team_nl_team_put(team);
2668 rtnl_unlock:
2669         rtnl_unlock();
2670         return err;
2671 }
2672
2673 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2674                                      struct team_port *port)
2675 {
2676         struct nlattr *port_item;
2677
2678         port_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_PORT);
2679         if (!port_item)
2680                 goto nest_cancel;
2681         if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2682                 goto nest_cancel;
2683         if (port->changed) {
2684                 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2685                         goto nest_cancel;
2686                 port->changed = false;
2687         }
2688         if ((port->removed &&
2689              nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2690             (port->state.linkup &&
2691              nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2692             nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2693             nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2694                 goto nest_cancel;
2695         nla_nest_end(skb, port_item);
2696         return 0;
2697
2698 nest_cancel:
2699         nla_nest_cancel(skb, port_item);
2700         return -EMSGSIZE;
2701 }
2702
2703 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2704                                       int flags, team_nl_send_func_t *send_func,
2705                                       struct team_port *one_port)
2706 {
2707         struct nlattr *port_list;
2708         struct nlmsghdr *nlh;
2709         void *hdr;
2710         struct team_port *port;
2711         int err;
2712         struct sk_buff *skb = NULL;
2713         bool incomplete;
2714         int i;
2715
2716         port = list_first_entry_or_null(&team->port_list,
2717                                         struct team_port, list);
2718
2719 start_again:
2720         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2721         if (err)
2722                 return err;
2723
2724         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2725                           TEAM_CMD_PORT_LIST_GET);
2726         if (!hdr) {
2727                 nlmsg_free(skb);
2728                 return -EMSGSIZE;
2729         }
2730
2731         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2732                 goto nla_put_failure;
2733         port_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_PORT);
2734         if (!port_list)
2735                 goto nla_put_failure;
2736
2737         i = 0;
2738         incomplete = false;
2739
2740         /* If one port is selected, called wants to send port list containing
2741          * only this port. Otherwise go through all listed ports and send all
2742          */
2743         if (one_port) {
2744                 err = team_nl_fill_one_port_get(skb, one_port);
2745                 if (err)
2746                         goto errout;
2747         } else if (port) {
2748                 list_for_each_entry_from(port, &team->port_list, list) {
2749                         err = team_nl_fill_one_port_get(skb, port);
2750                         if (err) {
2751                                 if (err == -EMSGSIZE) {
2752                                         if (!i)
2753                                                 goto errout;
2754                                         incomplete = true;
2755                                         break;
2756                                 }
2757                                 goto errout;
2758                         }
2759                         i++;
2760                 }
2761         }
2762
2763         nla_nest_end(skb, port_list);
2764         genlmsg_end(skb, hdr);
2765         if (incomplete)
2766                 goto start_again;
2767
2768 send_done:
2769         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2770         if (!nlh) {
2771                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2772                 if (err)
2773                         return err;
2774                 goto send_done;
2775         }
2776
2777         return send_func(skb, team, portid);
2778
2779 nla_put_failure:
2780         err = -EMSGSIZE;
2781 errout:
2782         nlmsg_free(skb);
2783         return err;
2784 }
2785
2786 int team_nl_port_list_get_doit(struct sk_buff *skb,
2787                                struct genl_info *info)
2788 {
2789         struct team *team;
2790         int err;
2791
2792         team = team_nl_team_get(info);
2793         if (!team)
2794                 return -EINVAL;
2795
2796         err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2797                                          NLM_F_ACK, team_nl_send_unicast, NULL);
2798
2799         team_nl_team_put(team);
2800
2801         return err;
2802 }
2803
2804 static const struct genl_multicast_group team_nl_mcgrps[] = {
2805         { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2806 };
2807
2808 static struct genl_family team_nl_family __ro_after_init = {
2809         .name           = TEAM_GENL_NAME,
2810         .version        = TEAM_GENL_VERSION,
2811         .maxattr        = ARRAY_SIZE(team_nl_policy) - 1,
2812         .policy = team_nl_policy,
2813         .netnsok        = true,
2814         .module         = THIS_MODULE,
2815         .small_ops      = team_nl_ops,
2816         .n_small_ops    = ARRAY_SIZE(team_nl_ops),
2817         .resv_start_op  = TEAM_CMD_PORT_LIST_GET + 1,
2818         .mcgrps         = team_nl_mcgrps,
2819         .n_mcgrps       = ARRAY_SIZE(team_nl_mcgrps),
2820 };
2821
2822 static int team_nl_send_multicast(struct sk_buff *skb,
2823                                   struct team *team, u32 portid)
2824 {
2825         return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2826                                        skb, 0, 0, GFP_KERNEL);
2827 }
2828
2829 static int team_nl_send_event_options_get(struct team *team,
2830                                           struct list_head *sel_opt_inst_list)
2831 {
2832         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2833                                         sel_opt_inst_list);
2834 }
2835
2836 static int team_nl_send_event_port_get(struct team *team,
2837                                        struct team_port *port)
2838 {
2839         return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2840                                           port);
2841 }
2842
2843 static int __init team_nl_init(void)
2844 {
2845         return genl_register_family(&team_nl_family);
2846 }
2847
2848 static void __exit team_nl_fini(void)
2849 {
2850         genl_unregister_family(&team_nl_family);
2851 }
2852
2853
2854 /******************
2855  * Change checkers
2856  ******************/
2857
2858 static void __team_options_change_check(struct team *team)
2859 {
2860         int err;
2861         struct team_option_inst *opt_inst;
2862         LIST_HEAD(sel_opt_inst_list);
2863
2864         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2865                 if (opt_inst->changed)
2866                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2867         }
2868         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2869         if (err && err != -ESRCH)
2870                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2871                             err);
2872 }
2873
2874 /* rtnl lock is held */
2875
2876 static void __team_port_change_send(struct team_port *port, bool linkup)
2877 {
2878         int err;
2879
2880         port->changed = true;
2881         port->state.linkup = linkup;
2882         team_refresh_port_linkup(port);
2883         if (linkup) {
2884                 struct ethtool_link_ksettings ecmd;
2885
2886                 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2887                 if (!err) {
2888                         port->state.speed = ecmd.base.speed;
2889                         port->state.duplex = ecmd.base.duplex;
2890                         goto send_event;
2891                 }
2892         }
2893         port->state.speed = 0;
2894         port->state.duplex = 0;
2895
2896 send_event:
2897         err = team_nl_send_event_port_get(port->team, port);
2898         if (err && err != -ESRCH)
2899                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2900                             port->dev->name, err);
2901
2902 }
2903
2904 static void __team_carrier_check(struct team *team)
2905 {
2906         struct team_port *port;
2907         bool team_linkup;
2908
2909         if (team->user_carrier_enabled)
2910                 return;
2911
2912         team_linkup = false;
2913         list_for_each_entry(port, &team->port_list, list) {
2914                 if (port->linkup) {
2915                         team_linkup = true;
2916                         break;
2917                 }
2918         }
2919
2920         if (team_linkup)
2921                 netif_carrier_on(team->dev);
2922         else
2923                 netif_carrier_off(team->dev);
2924 }
2925
2926 static void __team_port_change_check(struct team_port *port, bool linkup)
2927 {
2928         if (port->state.linkup != linkup)
2929                 __team_port_change_send(port, linkup);
2930         __team_carrier_check(port->team);
2931 }
2932
2933 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2934 {
2935         __team_port_change_send(port, linkup);
2936         __team_carrier_check(port->team);
2937 }
2938
2939 static void __team_port_change_port_removed(struct team_port *port)
2940 {
2941         port->removed = true;
2942         __team_port_change_send(port, false);
2943         __team_carrier_check(port->team);
2944 }
2945
2946 static void team_port_change_check(struct team_port *port, bool linkup)
2947 {
2948         struct team *team = port->team;
2949
2950         mutex_lock(&team->lock);
2951         __team_port_change_check(port, linkup);
2952         mutex_unlock(&team->lock);
2953 }
2954
2955
2956 /************************************
2957  * Net device notifier event handler
2958  ************************************/
2959
2960 static int team_device_event(struct notifier_block *unused,
2961                              unsigned long event, void *ptr)
2962 {
2963         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2964         struct team_port *port;
2965
2966         port = team_port_get_rtnl(dev);
2967         if (!port)
2968                 return NOTIFY_DONE;
2969
2970         switch (event) {
2971         case NETDEV_UP:
2972                 if (netif_oper_up(dev))
2973                         team_port_change_check(port, true);
2974                 break;
2975         case NETDEV_DOWN:
2976                 team_port_change_check(port, false);
2977                 break;
2978         case NETDEV_CHANGE:
2979                 if (netif_running(port->dev))
2980                         team_port_change_check(port,
2981                                                !!netif_oper_up(port->dev));
2982                 break;
2983         case NETDEV_UNREGISTER:
2984                 team_del_slave(port->team->dev, dev);
2985                 break;
2986         case NETDEV_FEAT_CHANGE:
2987                 if (!port->team->notifier_ctx) {
2988                         port->team->notifier_ctx = true;
2989                         team_compute_features(port->team);
2990                         port->team->notifier_ctx = false;
2991                 }
2992                 break;
2993         case NETDEV_PRECHANGEMTU:
2994                 /* Forbid to change mtu of underlaying device */
2995                 if (!port->team->port_mtu_change_allowed)
2996                         return NOTIFY_BAD;
2997                 break;
2998         case NETDEV_PRE_TYPE_CHANGE:
2999                 /* Forbid to change type of underlaying device */
3000                 return NOTIFY_BAD;
3001         case NETDEV_RESEND_IGMP:
3002                 /* Propagate to master device */
3003                 call_netdevice_notifiers(event, port->team->dev);
3004                 break;
3005         }
3006         return NOTIFY_DONE;
3007 }
3008
3009 static struct notifier_block team_notifier_block __read_mostly = {
3010         .notifier_call = team_device_event,
3011 };
3012
3013
3014 /***********************
3015  * Module init and exit
3016  ***********************/
3017
3018 static int __init team_module_init(void)
3019 {
3020         int err;
3021
3022         register_netdevice_notifier(&team_notifier_block);
3023
3024         err = rtnl_link_register(&team_link_ops);
3025         if (err)
3026                 goto err_rtnl_reg;
3027
3028         err = team_nl_init();
3029         if (err)
3030                 goto err_nl_init;
3031
3032         return 0;
3033
3034 err_nl_init:
3035         rtnl_link_unregister(&team_link_ops);
3036
3037 err_rtnl_reg:
3038         unregister_netdevice_notifier(&team_notifier_block);
3039
3040         return err;
3041 }
3042
3043 static void __exit team_module_exit(void)
3044 {
3045         team_nl_fini();
3046         rtnl_link_unregister(&team_link_ops);
3047         unregister_netdevice_notifier(&team_notifier_block);
3048 }
3049
3050 module_init(team_module_init);
3051 module_exit(team_module_exit);
3052
3053 MODULE_LICENSE("GPL v2");
3054 MODULE_AUTHOR("Jiri Pirko <[email protected]>");
3055 MODULE_DESCRIPTION("Ethernet team device driver");
3056 MODULE_ALIAS_RTNL_LINK(DRV_NAME);