drivers/net/team/team.c

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