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