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 {
1121         struct netdev_lag_upper_info lag_upper_info;
1122         int err;
1123
1124         lag_upper_info.tx_type = team->mode->lag_tx_type;
1125         err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1126                                            &lag_upper_info);
1127         if (err)
1128                 return err;
1129         port->dev->priv_flags |= IFF_TEAM_PORT;
1130         return 0;
1131 }
1132
1133 static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1134 {
1135         netdev_upper_dev_unlink(port->dev, team->dev);
1136         port->dev->priv_flags &= ~IFF_TEAM_PORT;
1137 }
1138
1139 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1140 static int team_dev_type_check_change(struct net_device *dev,
1141                                       struct net_device *port_dev);
1142
1143 static int team_port_add(struct team *team, struct net_device *port_dev)
1144 {
1145         struct net_device *dev = team->dev;
1146         struct team_port *port;
1147         char *portname = port_dev->name;
1148         int err;
1149
1150         if (port_dev->flags & IFF_LOOPBACK) {
1151                 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1152                            portname);
1153                 return -EINVAL;
1154         }
1155
1156         if (team_port_exists(port_dev)) {
1157                 netdev_err(dev, "Device %s is already a port "
1158                                 "of a team device\n", portname);
1159                 return -EBUSY;
1160         }
1161
1162         if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1163             vlan_uses_dev(dev)) {
1164                 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1165                            portname);
1166                 return -EPERM;
1167         }
1168
1169         err = team_dev_type_check_change(dev, port_dev);
1170         if (err)
1171                 return err;
1172
1173         if (port_dev->flags & IFF_UP) {
1174                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1175                            portname);
1176                 return -EBUSY;
1177         }
1178
1179         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1180                        GFP_KERNEL);
1181         if (!port)
1182                 return -ENOMEM;
1183
1184         port->dev = port_dev;
1185         port->team = team;
1186         INIT_LIST_HEAD(&port->qom_list);
1187
1188         port->orig.mtu = port_dev->mtu;
1189         err = dev_set_mtu(port_dev, dev->mtu);
1190         if (err) {
1191                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1192                 goto err_set_mtu;
1193         }
1194
1195         memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1196
1197         err = team_port_enter(team, port);
1198         if (err) {
1199                 netdev_err(dev, "Device %s failed to enter team mode\n",
1200                            portname);
1201                 goto err_port_enter;
1202         }
1203
1204         err = dev_open(port_dev);
1205         if (err) {
1206                 netdev_dbg(dev, "Device %s opening failed\n",
1207                            portname);
1208                 goto err_dev_open;
1209         }
1210
1211         err = vlan_vids_add_by_dev(port_dev, dev);
1212         if (err) {
1213                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1214                                 portname);
1215                 goto err_vids_add;
1216         }
1217
1218         err = team_port_enable_netpoll(team, port);
1219         if (err) {
1220                 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1221                            portname);
1222                 goto err_enable_netpoll;
1223         }
1224
1225         if (!(dev->features & NETIF_F_LRO))
1226                 dev_disable_lro(port_dev);
1227
1228         err = netdev_rx_handler_register(port_dev, team_handle_frame,
1229                                          port);
1230         if (err) {
1231                 netdev_err(dev, "Device %s failed to register rx_handler\n",
1232                            portname);
1233                 goto err_handler_register;
1234         }
1235
1236         err = team_upper_dev_link(team, port);
1237         if (err) {
1238                 netdev_err(dev, "Device %s failed to set upper link\n",
1239                            portname);
1240                 goto err_set_upper_link;
1241         }
1242
1243         err = __team_option_inst_add_port(team, port);
1244         if (err) {
1245                 netdev_err(dev, "Device %s failed to add per-port options\n",
1246                            portname);
1247                 goto err_option_port_add;
1248         }
1249
1250         netif_addr_lock_bh(dev);
1251         dev_uc_sync_multiple(port_dev, dev);
1252         dev_mc_sync_multiple(port_dev, dev);
1253         netif_addr_unlock_bh(dev);
1254
1255         port->index = -1;
1256         list_add_tail_rcu(&port->list, &team->port_list);
1257         team_port_enable(team, port);
1258         __team_compute_features(team);
1259         __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1260         __team_options_change_check(team);
1261
1262         netdev_info(dev, "Port device %s added\n", portname);
1263
1264         return 0;
1265
1266 err_option_port_add:
1267         team_upper_dev_unlink(team, port);
1268
1269 err_set_upper_link:
1270         netdev_rx_handler_unregister(port_dev);
1271
1272 err_handler_register:
1273         team_port_disable_netpoll(port);
1274
1275 err_enable_netpoll:
1276         vlan_vids_del_by_dev(port_dev, dev);
1277
1278 err_vids_add:
1279         dev_close(port_dev);
1280
1281 err_dev_open:
1282         team_port_leave(team, port);
1283         team_port_set_orig_dev_addr(port);
1284
1285 err_port_enter:
1286         dev_set_mtu(port_dev, port->orig.mtu);
1287
1288 err_set_mtu:
1289         kfree(port);
1290
1291         return err;
1292 }
1293
1294 static void __team_port_change_port_removed(struct team_port *port);
1295
1296 static int team_port_del(struct team *team, struct net_device *port_dev)
1297 {
1298         struct net_device *dev = team->dev;
1299         struct team_port *port;
1300         char *portname = port_dev->name;
1301
1302         port = team_port_get_rtnl(port_dev);
1303         if (!port || !team_port_find(team, port)) {
1304                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1305                            portname);
1306                 return -ENOENT;
1307         }
1308
1309         team_port_disable(team, port);
1310         list_del_rcu(&port->list);
1311         team_upper_dev_unlink(team, port);
1312         netdev_rx_handler_unregister(port_dev);
1313         team_port_disable_netpoll(port);
1314         vlan_vids_del_by_dev(port_dev, dev);
1315         dev_uc_unsync(port_dev, dev);
1316         dev_mc_unsync(port_dev, dev);
1317         dev_close(port_dev);
1318         team_port_leave(team, port);
1319
1320         __team_option_inst_mark_removed_port(team, port);
1321         __team_options_change_check(team);
1322         __team_option_inst_del_port(team, port);
1323         __team_port_change_port_removed(port);
1324
1325         team_port_set_orig_dev_addr(port);
1326         dev_set_mtu(port_dev, port->orig.mtu);
1327         kfree_rcu(port, rcu);
1328         netdev_info(dev, "Port device %s removed\n", portname);
1329         __team_compute_features(team);
1330
1331         return 0;
1332 }
1333
1334
1335 /*****************
1336  * Net device ops
1337  *****************/
1338
1339 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1340 {
1341         ctx->data.str_val = team->mode->kind;
1342         return 0;
1343 }
1344
1345 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1346 {
1347         return team_change_mode(team, ctx->data.str_val);
1348 }
1349
1350 static int team_notify_peers_count_get(struct team *team,
1351                                        struct team_gsetter_ctx *ctx)
1352 {
1353         ctx->data.u32_val = team->notify_peers.count;
1354         return 0;
1355 }
1356
1357 static int team_notify_peers_count_set(struct team *team,
1358                                        struct team_gsetter_ctx *ctx)
1359 {
1360         team->notify_peers.count = ctx->data.u32_val;
1361         return 0;
1362 }
1363
1364 static int team_notify_peers_interval_get(struct team *team,
1365                                           struct team_gsetter_ctx *ctx)
1366 {
1367         ctx->data.u32_val = team->notify_peers.interval;
1368         return 0;
1369 }
1370
1371 static int team_notify_peers_interval_set(struct team *team,
1372                                           struct team_gsetter_ctx *ctx)
1373 {
1374         team->notify_peers.interval = ctx->data.u32_val;
1375         return 0;
1376 }
1377
1378 static int team_mcast_rejoin_count_get(struct team *team,
1379                                        struct team_gsetter_ctx *ctx)
1380 {
1381         ctx->data.u32_val = team->mcast_rejoin.count;
1382         return 0;
1383 }
1384
1385 static int team_mcast_rejoin_count_set(struct team *team,
1386                                        struct team_gsetter_ctx *ctx)
1387 {
1388         team->mcast_rejoin.count = ctx->data.u32_val;
1389         return 0;
1390 }
1391
1392 static int team_mcast_rejoin_interval_get(struct team *team,
1393                                           struct team_gsetter_ctx *ctx)
1394 {
1395         ctx->data.u32_val = team->mcast_rejoin.interval;
1396         return 0;
1397 }
1398
1399 static int team_mcast_rejoin_interval_set(struct team *team,
1400                                           struct team_gsetter_ctx *ctx)
1401 {
1402         team->mcast_rejoin.interval = ctx->data.u32_val;
1403         return 0;
1404 }
1405
1406 static int team_port_en_option_get(struct team *team,
1407                                    struct team_gsetter_ctx *ctx)
1408 {
1409         struct team_port *port = ctx->info->port;
1410
1411         ctx->data.bool_val = team_port_enabled(port);
1412         return 0;
1413 }
1414
1415 static int team_port_en_option_set(struct team *team,
1416                                    struct team_gsetter_ctx *ctx)
1417 {
1418         struct team_port *port = ctx->info->port;
1419
1420         if (ctx->data.bool_val)
1421                 team_port_enable(team, port);
1422         else
1423                 team_port_disable(team, port);
1424         return 0;
1425 }
1426
1427 static int team_user_linkup_option_get(struct team *team,
1428                                        struct team_gsetter_ctx *ctx)
1429 {
1430         struct team_port *port = ctx->info->port;
1431
1432         ctx->data.bool_val = port->user.linkup;
1433         return 0;
1434 }
1435
1436 static void __team_carrier_check(struct team *team);
1437
1438 static int team_user_linkup_option_set(struct team *team,
1439                                        struct team_gsetter_ctx *ctx)
1440 {
1441         struct team_port *port = ctx->info->port;
1442
1443         port->user.linkup = ctx->data.bool_val;
1444         team_refresh_port_linkup(port);
1445         __team_carrier_check(port->team);
1446         return 0;
1447 }
1448
1449 static int team_user_linkup_en_option_get(struct team *team,
1450                                           struct team_gsetter_ctx *ctx)
1451 {
1452         struct team_port *port = ctx->info->port;
1453
1454         ctx->data.bool_val = port->user.linkup_enabled;
1455         return 0;
1456 }
1457
1458 static int team_user_linkup_en_option_set(struct team *team,
1459                                           struct team_gsetter_ctx *ctx)
1460 {
1461         struct team_port *port = ctx->info->port;
1462
1463         port->user.linkup_enabled = ctx->data.bool_val;
1464         team_refresh_port_linkup(port);
1465         __team_carrier_check(port->team);
1466         return 0;
1467 }
1468
1469 static int team_priority_option_get(struct team *team,
1470                                     struct team_gsetter_ctx *ctx)
1471 {
1472         struct team_port *port = ctx->info->port;
1473
1474         ctx->data.s32_val = port->priority;
1475         return 0;
1476 }
1477
1478 static int team_priority_option_set(struct team *team,
1479                                     struct team_gsetter_ctx *ctx)
1480 {
1481         struct team_port *port = ctx->info->port;
1482         s32 priority = ctx->data.s32_val;
1483
1484         if (port->priority == priority)
1485                 return 0;
1486         port->priority = priority;
1487         team_queue_override_port_prio_changed(team, port);
1488         return 0;
1489 }
1490
1491 static int team_queue_id_option_get(struct team *team,
1492                                     struct team_gsetter_ctx *ctx)
1493 {
1494         struct team_port *port = ctx->info->port;
1495
1496         ctx->data.u32_val = port->queue_id;
1497         return 0;
1498 }
1499
1500 static int team_queue_id_option_set(struct team *team,
1501                                     struct team_gsetter_ctx *ctx)
1502 {
1503         struct team_port *port = ctx->info->port;
1504         u16 new_queue_id = ctx->data.u32_val;
1505
1506         if (port->queue_id == new_queue_id)
1507                 return 0;
1508         if (new_queue_id >= team->dev->real_num_tx_queues)
1509                 return -EINVAL;
1510         team_queue_override_port_change_queue_id(team, port, new_queue_id);
1511         return 0;
1512 }
1513
1514 static const struct team_option team_options[] = {
1515         {
1516                 .name = "mode",
1517                 .type = TEAM_OPTION_TYPE_STRING,
1518                 .getter = team_mode_option_get,
1519                 .setter = team_mode_option_set,
1520         },
1521         {
1522                 .name = "notify_peers_count",
1523                 .type = TEAM_OPTION_TYPE_U32,
1524                 .getter = team_notify_peers_count_get,
1525                 .setter = team_notify_peers_count_set,
1526         },
1527         {
1528                 .name = "notify_peers_interval",
1529                 .type = TEAM_OPTION_TYPE_U32,
1530                 .getter = team_notify_peers_interval_get,
1531                 .setter = team_notify_peers_interval_set,
1532         },
1533         {
1534                 .name = "mcast_rejoin_count",
1535                 .type = TEAM_OPTION_TYPE_U32,
1536                 .getter = team_mcast_rejoin_count_get,
1537                 .setter = team_mcast_rejoin_count_set,
1538         },
1539         {
1540                 .name = "mcast_rejoin_interval",
1541                 .type = TEAM_OPTION_TYPE_U32,
1542                 .getter = team_mcast_rejoin_interval_get,
1543                 .setter = team_mcast_rejoin_interval_set,
1544         },
1545         {
1546                 .name = "enabled",
1547                 .type = TEAM_OPTION_TYPE_BOOL,
1548                 .per_port = true,
1549                 .getter = team_port_en_option_get,
1550                 .setter = team_port_en_option_set,
1551         },
1552         {
1553                 .name = "user_linkup",
1554                 .type = TEAM_OPTION_TYPE_BOOL,
1555                 .per_port = true,
1556                 .getter = team_user_linkup_option_get,
1557                 .setter = team_user_linkup_option_set,
1558         },
1559         {
1560                 .name = "user_linkup_enabled",
1561                 .type = TEAM_OPTION_TYPE_BOOL,
1562                 .per_port = true,
1563                 .getter = team_user_linkup_en_option_get,
1564                 .setter = team_user_linkup_en_option_set,
1565         },
1566         {
1567                 .name = "priority",
1568                 .type = TEAM_OPTION_TYPE_S32,
1569                 .per_port = true,
1570                 .getter = team_priority_option_get,
1571                 .setter = team_priority_option_set,
1572         },
1573         {
1574                 .name = "queue_id",
1575                 .type = TEAM_OPTION_TYPE_U32,
1576                 .per_port = true,
1577                 .getter = team_queue_id_option_get,
1578                 .setter = team_queue_id_option_set,
1579         },
1580 };
1581
1582
1583 static int team_init(struct net_device *dev)
1584 {
1585         struct team *team = netdev_priv(dev);
1586         int i;
1587         int err;
1588
1589         team->dev = dev;
1590         mutex_init(&team->lock);
1591         team_set_no_mode(team);
1592
1593         team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1594         if (!team->pcpu_stats)
1595                 return -ENOMEM;
1596
1597         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1598                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1599         INIT_LIST_HEAD(&team->port_list);
1600         err = team_queue_override_init(team);
1601         if (err)
1602                 goto err_team_queue_override_init;
1603
1604         team_adjust_ops(team);
1605
1606         INIT_LIST_HEAD(&team->option_list);
1607         INIT_LIST_HEAD(&team->option_inst_list);
1608
1609         team_notify_peers_init(team);
1610         team_mcast_rejoin_init(team);
1611
1612         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1613         if (err)
1614                 goto err_options_register;
1615         netif_carrier_off(dev);
1616
1617         netdev_lockdep_set_classes(dev);
1618
1619         return 0;
1620
1621 err_options_register:
1622         team_mcast_rejoin_fini(team);
1623         team_notify_peers_fini(team);
1624         team_queue_override_fini(team);
1625 err_team_queue_override_init:
1626         free_percpu(team->pcpu_stats);
1627
1628         return err;
1629 }
1630
1631 static void team_uninit(struct net_device *dev)
1632 {
1633         struct team *team = netdev_priv(dev);
1634         struct team_port *port;
1635         struct team_port *tmp;
1636
1637         mutex_lock(&team->lock);
1638         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1639                 team_port_del(team, port->dev);
1640
1641         __team_change_mode(team, NULL); /* cleanup */
1642         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1643         team_mcast_rejoin_fini(team);
1644         team_notify_peers_fini(team);
1645         team_queue_override_fini(team);
1646         mutex_unlock(&team->lock);
1647         netdev_change_features(dev);
1648 }
1649
1650 static void team_destructor(struct net_device *dev)
1651 {
1652         struct team *team = netdev_priv(dev);
1653
1654         free_percpu(team->pcpu_stats);
1655 }
1656
1657 static int team_open(struct net_device *dev)
1658 {
1659         return 0;
1660 }
1661
1662 static int team_close(struct net_device *dev)
1663 {
1664         return 0;
1665 }
1666
1667 /*
1668  * note: already called with rcu_read_lock
1669  */
1670 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1671 {
1672         struct team *team = netdev_priv(dev);
1673         bool tx_success;
1674         unsigned int len = skb->len;
1675
1676         tx_success = team_queue_override_transmit(team, skb);
1677         if (!tx_success)
1678                 tx_success = team->ops.transmit(team, skb);
1679         if (tx_success) {
1680                 struct team_pcpu_stats *pcpu_stats;
1681
1682                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1683                 u64_stats_update_begin(&pcpu_stats->syncp);
1684                 pcpu_stats->tx_packets++;
1685                 pcpu_stats->tx_bytes += len;
1686                 u64_stats_update_end(&pcpu_stats->syncp);
1687         } else {
1688                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1689         }
1690
1691         return NETDEV_TX_OK;
1692 }
1693
1694 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1695                              void *accel_priv, select_queue_fallback_t fallback)
1696 {
1697         /*
1698          * This helper function exists to help dev_pick_tx get the correct
1699          * destination queue.  Using a helper function skips a call to
1700          * skb_tx_hash and will put the skbs in the queue we expect on their
1701          * way down to the team driver.
1702          */
1703         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1704
1705         /*
1706          * Save the original txq to restore before passing to the driver
1707          */
1708         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1709
1710         if (unlikely(txq >= dev->real_num_tx_queues)) {
1711                 do {
1712                         txq -= dev->real_num_tx_queues;
1713                 } while (txq >= dev->real_num_tx_queues);
1714         }
1715         return txq;
1716 }
1717
1718 static void team_change_rx_flags(struct net_device *dev, int change)
1719 {
1720         struct team *team = netdev_priv(dev);
1721         struct team_port *port;
1722         int inc;
1723
1724         rcu_read_lock();
1725         list_for_each_entry_rcu(port, &team->port_list, list) {
1726                 if (change & IFF_PROMISC) {
1727                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1728                         dev_set_promiscuity(port->dev, inc);
1729                 }
1730                 if (change & IFF_ALLMULTI) {
1731                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1732                         dev_set_allmulti(port->dev, inc);
1733                 }
1734         }
1735         rcu_read_unlock();
1736 }
1737
1738 static void team_set_rx_mode(struct net_device *dev)
1739 {
1740         struct team *team = netdev_priv(dev);
1741         struct team_port *port;
1742
1743         rcu_read_lock();
1744         list_for_each_entry_rcu(port, &team->port_list, list) {
1745                 dev_uc_sync_multiple(port->dev, dev);
1746                 dev_mc_sync_multiple(port->dev, dev);
1747         }
1748         rcu_read_unlock();
1749 }
1750
1751 static int team_set_mac_address(struct net_device *dev, void *p)
1752 {
1753         struct sockaddr *addr = p;
1754         struct team *team = netdev_priv(dev);
1755         struct team_port *port;
1756
1757         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1758                 return -EADDRNOTAVAIL;
1759         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1760         mutex_lock(&team->lock);
1761         list_for_each_entry(port, &team->port_list, list)
1762                 if (team->ops.port_change_dev_addr)
1763                         team->ops.port_change_dev_addr(team, port);
1764         mutex_unlock(&team->lock);
1765         return 0;
1766 }
1767
1768 static int team_change_mtu(struct net_device *dev, int new_mtu)
1769 {
1770         struct team *team = netdev_priv(dev);
1771         struct team_port *port;
1772         int err;
1773
1774         /*
1775          * Alhough this is reader, it's guarded by team lock. It's not possible
1776          * to traverse list in reverse under rcu_read_lock
1777          */
1778         mutex_lock(&team->lock);
1779         team->port_mtu_change_allowed = true;
1780         list_for_each_entry(port, &team->port_list, list) {
1781                 err = dev_set_mtu(port->dev, new_mtu);
1782                 if (err) {
1783                         netdev_err(dev, "Device %s failed to change mtu",
1784                                    port->dev->name);
1785                         goto unwind;
1786                 }
1787         }
1788         team->port_mtu_change_allowed = false;
1789         mutex_unlock(&team->lock);
1790
1791         dev->mtu = new_mtu;
1792
1793         return 0;
1794
1795 unwind:
1796         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1797                 dev_set_mtu(port->dev, dev->mtu);
1798         team->port_mtu_change_allowed = false;
1799         mutex_unlock(&team->lock);
1800
1801         return err;
1802 }
1803
1804 static void
1805 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1806 {
1807         struct team *team = netdev_priv(dev);
1808         struct team_pcpu_stats *p;
1809         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1810         u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1811         unsigned int start;
1812         int i;
1813
1814         for_each_possible_cpu(i) {
1815                 p = per_cpu_ptr(team->pcpu_stats, i);
1816                 do {
1817                         start = u64_stats_fetch_begin_irq(&p->syncp);
1818                         rx_packets      = p->rx_packets;
1819                         rx_bytes        = p->rx_bytes;
1820                         rx_multicast    = p->rx_multicast;
1821                         tx_packets      = p->tx_packets;
1822                         tx_bytes        = p->tx_bytes;
1823                 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1824
1825                 stats->rx_packets       += rx_packets;
1826                 stats->rx_bytes         += rx_bytes;
1827                 stats->multicast        += rx_multicast;
1828                 stats->tx_packets       += tx_packets;
1829                 stats->tx_bytes         += tx_bytes;
1830                 /*
1831                  * rx_dropped, tx_dropped & rx_nohandler are u32,
1832                  * updated without syncp protection.
1833                  */
1834                 rx_dropped      += p->rx_dropped;
1835                 tx_dropped      += p->tx_dropped;
1836                 rx_nohandler    += p->rx_nohandler;
1837         }
1838         stats->rx_dropped       = rx_dropped;
1839         stats->tx_dropped       = tx_dropped;
1840         stats->rx_nohandler     = rx_nohandler;
1841 }
1842
1843 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1844 {
1845         struct team *team = netdev_priv(dev);
1846         struct team_port *port;
1847         int err;
1848
1849         /*
1850          * Alhough this is reader, it's guarded by team lock. It's not possible
1851          * to traverse list in reverse under rcu_read_lock
1852          */
1853         mutex_lock(&team->lock);
1854         list_for_each_entry(port, &team->port_list, list) {
1855                 err = vlan_vid_add(port->dev, proto, vid);
1856                 if (err)
1857                         goto unwind;
1858         }
1859         mutex_unlock(&team->lock);
1860
1861         return 0;
1862
1863 unwind:
1864         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1865                 vlan_vid_del(port->dev, proto, vid);
1866         mutex_unlock(&team->lock);
1867
1868         return err;
1869 }
1870
1871 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1872 {
1873         struct team *team = netdev_priv(dev);
1874         struct team_port *port;
1875
1876         mutex_lock(&team->lock);
1877         list_for_each_entry(port, &team->port_list, list)
1878                 vlan_vid_del(port->dev, proto, vid);
1879         mutex_unlock(&team->lock);
1880
1881         return 0;
1882 }
1883
1884 #ifdef CONFIG_NET_POLL_CONTROLLER
1885 static void team_poll_controller(struct net_device *dev)
1886 {
1887 }
1888
1889 static void __team_netpoll_cleanup(struct team *team)
1890 {
1891         struct team_port *port;
1892
1893         list_for_each_entry(port, &team->port_list, list)
1894                 team_port_disable_netpoll(port);
1895 }
1896
1897 static void team_netpoll_cleanup(struct net_device *dev)
1898 {
1899         struct team *team = netdev_priv(dev);
1900
1901         mutex_lock(&team->lock);
1902         __team_netpoll_cleanup(team);
1903         mutex_unlock(&team->lock);
1904 }
1905
1906 static int team_netpoll_setup(struct net_device *dev,
1907                               struct netpoll_info *npifo)
1908 {
1909         struct team *team = netdev_priv(dev);
1910         struct team_port *port;
1911         int err = 0;
1912
1913         mutex_lock(&team->lock);
1914         list_for_each_entry(port, &team->port_list, list) {
1915                 err = team_port_enable_netpoll(team, port);
1916                 if (err) {
1917                         __team_netpoll_cleanup(team);
1918                         break;
1919                 }
1920         }
1921         mutex_unlock(&team->lock);
1922         return err;
1923 }
1924 #endif
1925
1926 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1927 {
1928         struct team *team = netdev_priv(dev);
1929         int err;
1930
1931         mutex_lock(&team->lock);
1932         err = team_port_add(team, port_dev);
1933         mutex_unlock(&team->lock);
1934
1935         if (!err)
1936                 netdev_change_features(dev);
1937
1938         return err;
1939 }
1940
1941 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1942 {
1943         struct team *team = netdev_priv(dev);
1944         int err;
1945
1946         mutex_lock(&team->lock);
1947         err = team_port_del(team, port_dev);
1948         mutex_unlock(&team->lock);
1949
1950         if (!err)
1951                 netdev_change_features(dev);
1952
1953         return err;
1954 }
1955
1956 static netdev_features_t team_fix_features(struct net_device *dev,
1957                                            netdev_features_t features)
1958 {
1959         struct team_port *port;
1960         struct team *team = netdev_priv(dev);
1961         netdev_features_t mask;
1962
1963         mask = features;
1964         features &= ~NETIF_F_ONE_FOR_ALL;
1965         features |= NETIF_F_ALL_FOR_ALL;
1966
1967         rcu_read_lock();
1968         list_for_each_entry_rcu(port, &team->port_list, list) {
1969                 features = netdev_increment_features(features,
1970                                                      port->dev->features,
1971                                                      mask);
1972         }
1973         rcu_read_unlock();
1974
1975         features = netdev_add_tso_features(features, mask);
1976
1977         return features;
1978 }
1979
1980 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1981 {
1982         struct team *team = netdev_priv(dev);
1983
1984         team->user_carrier_enabled = true;
1985
1986         if (new_carrier)
1987                 netif_carrier_on(dev);
1988         else
1989                 netif_carrier_off(dev);
1990         return 0;
1991 }
1992
1993 static const struct net_device_ops team_netdev_ops = {
1994         .ndo_init               = team_init,
1995         .ndo_uninit             = team_uninit,
1996         .ndo_open               = team_open,
1997         .ndo_stop               = team_close,
1998         .ndo_start_xmit         = team_xmit,
1999         .ndo_select_queue       = team_select_queue,
2000         .ndo_change_rx_flags    = team_change_rx_flags,
2001         .ndo_set_rx_mode        = team_set_rx_mode,
2002         .ndo_set_mac_address    = team_set_mac_address,
2003         .ndo_change_mtu         = team_change_mtu,
2004         .ndo_get_stats64        = team_get_stats64,
2005         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
2006         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
2007 #ifdef CONFIG_NET_POLL_CONTROLLER
2008         .ndo_poll_controller    = team_poll_controller,
2009         .ndo_netpoll_setup      = team_netpoll_setup,
2010         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
2011 #endif
2012         .ndo_add_slave          = team_add_slave,
2013         .ndo_del_slave          = team_del_slave,
2014         .ndo_fix_features       = team_fix_features,
2015         .ndo_change_carrier     = team_change_carrier,
2016         .ndo_features_check     = passthru_features_check,
2017 };
2018
2019 /***********************
2020  * ethtool interface
2021  ***********************/
2022
2023 static void team_ethtool_get_drvinfo(struct net_device *dev,
2024                                      struct ethtool_drvinfo *drvinfo)
2025 {
2026         strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2027         strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2028 }
2029
2030 static const struct ethtool_ops team_ethtool_ops = {
2031         .get_drvinfo            = team_ethtool_get_drvinfo,
2032         .get_link               = ethtool_op_get_link,
2033 };
2034
2035 /***********************
2036  * rt netlink interface
2037  ***********************/
2038
2039 static void team_setup_by_port(struct net_device *dev,
2040                                struct net_device *port_dev)
2041 {
2042         dev->header_ops = port_dev->header_ops;
2043         dev->type = port_dev->type;
2044         dev->hard_header_len = port_dev->hard_header_len;
2045         dev->addr_len = port_dev->addr_len;
2046         dev->mtu = port_dev->mtu;
2047         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2048         eth_hw_addr_inherit(dev, port_dev);
2049 }
2050
2051 static int team_dev_type_check_change(struct net_device *dev,
2052                                       struct net_device *port_dev)
2053 {
2054         struct team *team = netdev_priv(dev);
2055         char *portname = port_dev->name;
2056         int err;
2057
2058         if (dev->type == port_dev->type)
2059                 return 0;
2060         if (!list_empty(&team->port_list)) {
2061                 netdev_err(dev, "Device %s is of different type\n", portname);
2062                 return -EBUSY;
2063         }
2064         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2065         err = notifier_to_errno(err);
2066         if (err) {
2067                 netdev_err(dev, "Refused to change device type\n");
2068                 return err;
2069         }
2070         dev_uc_flush(dev);
2071         dev_mc_flush(dev);
2072         team_setup_by_port(dev, port_dev);
2073         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2074         return 0;
2075 }
2076
2077 static void team_setup(struct net_device *dev)
2078 {
2079         ether_setup(dev);
2080         dev->max_mtu = ETH_MAX_MTU;
2081
2082         dev->netdev_ops = &team_netdev_ops;
2083         dev->ethtool_ops = &team_ethtool_ops;
2084         dev->needs_free_netdev = true;
2085         dev->priv_destructor = team_destructor;
2086         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2087         dev->priv_flags |= IFF_NO_QUEUE;
2088         dev->priv_flags |= IFF_TEAM;
2089
2090         /*
2091          * Indicate we support unicast address filtering. That way core won't
2092          * bring us to promisc mode in case a unicast addr is added.
2093          * Let this up to underlay drivers.
2094          */
2095         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2096
2097         dev->features |= NETIF_F_LLTX;
2098         dev->features |= NETIF_F_GRO;
2099
2100         /* Don't allow team devices to change network namespaces. */
2101         dev->features |= NETIF_F_NETNS_LOCAL;
2102
2103         dev->hw_features = TEAM_VLAN_FEATURES |
2104                            NETIF_F_HW_VLAN_CTAG_TX |
2105                            NETIF_F_HW_VLAN_CTAG_RX |
2106                            NETIF_F_HW_VLAN_CTAG_FILTER;
2107
2108         dev->hw_features |= NETIF_F_GSO_ENCAP_ALL;
2109         dev->features |= dev->hw_features;
2110 }
2111
2112 static int team_newlink(struct net *src_net, struct net_device *dev,
2113                         struct nlattr *tb[], struct nlattr *data[],
2114                         struct netlink_ext_ack *extack)
2115 {
2116         if (tb[IFLA_ADDRESS] == NULL)
2117                 eth_hw_addr_random(dev);
2118
2119         return register_netdevice(dev);
2120 }
2121
2122 static int team_validate(struct nlattr *tb[], struct nlattr *data[],
2123                          struct netlink_ext_ack *extack)
2124 {
2125         if (tb[IFLA_ADDRESS]) {
2126                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2127                         return -EINVAL;
2128                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2129                         return -EADDRNOTAVAIL;
2130         }
2131         return 0;
2132 }
2133
2134 static unsigned int team_get_num_tx_queues(void)
2135 {
2136         return TEAM_DEFAULT_NUM_TX_QUEUES;
2137 }
2138
2139 static unsigned int team_get_num_rx_queues(void)
2140 {
2141         return TEAM_DEFAULT_NUM_RX_QUEUES;
2142 }
2143
2144 static struct rtnl_link_ops team_link_ops __read_mostly = {
2145         .kind                   = DRV_NAME,
2146         .priv_size              = sizeof(struct team),
2147         .setup                  = team_setup,
2148         .newlink                = team_newlink,
2149         .validate               = team_validate,
2150         .get_num_tx_queues      = team_get_num_tx_queues,
2151         .get_num_rx_queues      = team_get_num_rx_queues,
2152 };
2153
2154
2155 /***********************************
2156  * Generic netlink custom interface
2157  ***********************************/
2158
2159 static struct genl_family team_nl_family;
2160
2161 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2162         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
2163         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
2164         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
2165         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
2166 };
2167
2168 static const struct nla_policy
2169 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2170         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
2171         [TEAM_ATTR_OPTION_NAME] = {
2172                 .type = NLA_STRING,
2173                 .len = TEAM_STRING_MAX_LEN,
2174         },
2175         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
2176         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
2177         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
2178 };
2179
2180 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2181 {
2182         struct sk_buff *msg;
2183         void *hdr;
2184         int err;
2185
2186         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2187         if (!msg)
2188                 return -ENOMEM;
2189
2190         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2191                           &team_nl_family, 0, TEAM_CMD_NOOP);
2192         if (!hdr) {
2193                 err = -EMSGSIZE;
2194                 goto err_msg_put;
2195         }
2196
2197         genlmsg_end(msg, hdr);
2198
2199         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2200
2201 err_msg_put:
2202         nlmsg_free(msg);
2203
2204         return err;
2205 }
2206
2207 /*
2208  * Netlink cmd functions should be locked by following two functions.
2209  * Since dev gets held here, that ensures dev won't disappear in between.
2210  */
2211 static struct team *team_nl_team_get(struct genl_info *info)
2212 {
2213         struct net *net = genl_info_net(info);
2214         int ifindex;
2215         struct net_device *dev;
2216         struct team *team;
2217
2218         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2219                 return NULL;
2220
2221         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2222         dev = dev_get_by_index(net, ifindex);
2223         if (!dev || dev->netdev_ops != &team_netdev_ops) {
2224                 if (dev)
2225                         dev_put(dev);
2226                 return NULL;
2227         }
2228
2229         team = netdev_priv(dev);
2230         mutex_lock(&team->lock);
2231         return team;
2232 }
2233
2234 static void team_nl_team_put(struct team *team)
2235 {
2236         mutex_unlock(&team->lock);
2237         dev_put(team->dev);
2238 }
2239
2240 typedef int team_nl_send_func_t(struct sk_buff *skb,
2241                                 struct team *team, u32 portid);
2242
2243 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2244 {
2245         return genlmsg_unicast(dev_net(team->dev), skb, portid);
2246 }
2247
2248 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2249                                        struct team_option_inst *opt_inst)
2250 {
2251         struct nlattr *option_item;
2252         struct team_option *option = opt_inst->option;
2253         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2254         struct team_gsetter_ctx ctx;
2255         int err;
2256
2257         ctx.info = opt_inst_info;
2258         err = team_option_get(team, opt_inst, &ctx);
2259         if (err)
2260                 return err;
2261
2262         option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2263         if (!option_item)
2264                 return -EMSGSIZE;
2265
2266         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2267                 goto nest_cancel;
2268         if (opt_inst_info->port &&
2269             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2270                         opt_inst_info->port->dev->ifindex))
2271                 goto nest_cancel;
2272         if (opt_inst->option->array_size &&
2273             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2274                         opt_inst_info->array_index))
2275                 goto nest_cancel;
2276
2277         switch (option->type) {
2278         case TEAM_OPTION_TYPE_U32:
2279                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2280                         goto nest_cancel;
2281                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2282                         goto nest_cancel;
2283                 break;
2284         case TEAM_OPTION_TYPE_STRING:
2285                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2286                         goto nest_cancel;
2287                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2288                                    ctx.data.str_val))
2289                         goto nest_cancel;
2290                 break;
2291         case TEAM_OPTION_TYPE_BINARY:
2292                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2293                         goto nest_cancel;
2294                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2295                             ctx.data.bin_val.ptr))
2296                         goto nest_cancel;
2297                 break;
2298         case TEAM_OPTION_TYPE_BOOL:
2299                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2300                         goto nest_cancel;
2301                 if (ctx.data.bool_val &&
2302                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2303                         goto nest_cancel;
2304                 break;
2305         case TEAM_OPTION_TYPE_S32:
2306                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2307                         goto nest_cancel;
2308                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2309                         goto nest_cancel;
2310                 break;
2311         default:
2312                 BUG();
2313         }
2314         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2315                 goto nest_cancel;
2316         if (opt_inst->changed) {
2317                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2318                         goto nest_cancel;
2319                 opt_inst->changed = false;
2320         }
2321         nla_nest_end(skb, option_item);
2322         return 0;
2323
2324 nest_cancel:
2325         nla_nest_cancel(skb, option_item);
2326         return -EMSGSIZE;
2327 }
2328
2329 static int __send_and_alloc_skb(struct sk_buff **pskb,
2330                                 struct team *team, u32 portid,
2331                                 team_nl_send_func_t *send_func)
2332 {
2333         int err;
2334
2335         if (*pskb) {
2336                 err = send_func(*pskb, team, portid);
2337                 if (err)
2338                         return err;
2339         }
2340         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2341         if (!*pskb)
2342                 return -ENOMEM;
2343         return 0;
2344 }
2345
2346 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2347                                     int flags, team_nl_send_func_t *send_func,
2348                                     struct list_head *sel_opt_inst_list)
2349 {
2350         struct nlattr *option_list;
2351         struct nlmsghdr *nlh;
2352         void *hdr;
2353         struct team_option_inst *opt_inst;
2354         int err;
2355         struct sk_buff *skb = NULL;
2356         bool incomplete;
2357         int i;
2358
2359         opt_inst = list_first_entry(sel_opt_inst_list,
2360                                     struct team_option_inst, tmp_list);
2361
2362 start_again:
2363         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2364         if (err)
2365                 return err;
2366
2367         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2368                           TEAM_CMD_OPTIONS_GET);
2369         if (!hdr) {
2370                 nlmsg_free(skb);
2371                 return -EMSGSIZE;
2372         }
2373
2374         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2375                 goto nla_put_failure;
2376         option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2377         if (!option_list)
2378                 goto nla_put_failure;
2379
2380         i = 0;
2381         incomplete = false;
2382         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2383                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2384                 if (err) {
2385                         if (err == -EMSGSIZE) {
2386                                 if (!i)
2387                                         goto errout;
2388                                 incomplete = true;
2389                                 break;
2390                         }
2391                         goto errout;
2392                 }
2393                 i++;
2394         }
2395
2396         nla_nest_end(skb, option_list);
2397         genlmsg_end(skb, hdr);
2398         if (incomplete)
2399                 goto start_again;
2400
2401 send_done:
2402         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2403         if (!nlh) {
2404                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2405                 if (err)
2406                         return err;
2407                 goto send_done;
2408         }
2409
2410         return send_func(skb, team, portid);
2411
2412 nla_put_failure:
2413         err = -EMSGSIZE;
2414 errout:
2415         genlmsg_cancel(skb, hdr);
2416         nlmsg_free(skb);
2417         return err;
2418 }
2419
2420 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2421 {
2422         struct team *team;
2423         struct team_option_inst *opt_inst;
2424         int err;
2425         LIST_HEAD(sel_opt_inst_list);
2426
2427         team = team_nl_team_get(info);
2428         if (!team)
2429                 return -EINVAL;
2430
2431         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2432                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2433         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2434                                        NLM_F_ACK, team_nl_send_unicast,
2435                                        &sel_opt_inst_list);
2436
2437         team_nl_team_put(team);
2438
2439         return err;
2440 }
2441
2442 static int team_nl_send_event_options_get(struct team *team,
2443                                           struct list_head *sel_opt_inst_list);
2444
2445 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2446 {
2447         struct team *team;
2448         int err = 0;
2449         int i;
2450         struct nlattr *nl_option;
2451         LIST_HEAD(opt_inst_list);
2452
2453         rtnl_lock();
2454
2455         team = team_nl_team_get(info);
2456         if (!team) {
2457                 err = -EINVAL;
2458                 goto rtnl_unlock;
2459         }
2460
2461         err = -EINVAL;
2462         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2463                 err = -EINVAL;
2464                 goto team_put;
2465         }
2466
2467         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2468                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2469                 struct nlattr *attr;
2470                 struct nlattr *attr_data;
2471                 enum team_option_type opt_type;
2472                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2473                 u32 opt_array_index = 0;
2474                 bool opt_is_array = false;
2475                 struct team_option_inst *opt_inst;
2476                 char *opt_name;
2477                 bool opt_found = false;
2478
2479                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2480                         err = -EINVAL;
2481                         goto team_put;
2482                 }
2483                 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2484                                        nl_option, team_nl_option_policy,
2485                                        info->extack);
2486                 if (err)
2487                         goto team_put;
2488                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2489                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2490                         err = -EINVAL;
2491                         goto team_put;
2492                 }
2493                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2494                 case NLA_U32:
2495                         opt_type = TEAM_OPTION_TYPE_U32;
2496                         break;
2497                 case NLA_STRING:
2498                         opt_type = TEAM_OPTION_TYPE_STRING;
2499                         break;
2500                 case NLA_BINARY:
2501                         opt_type = TEAM_OPTION_TYPE_BINARY;
2502                         break;
2503                 case NLA_FLAG:
2504                         opt_type = TEAM_OPTION_TYPE_BOOL;
2505                         break;
2506                 case NLA_S32:
2507                         opt_type = TEAM_OPTION_TYPE_S32;
2508                         break;
2509                 default:
2510                         goto team_put;
2511                 }
2512
2513                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2514                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2515                         err = -EINVAL;
2516                         goto team_put;
2517                 }
2518
2519                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2520                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2521                 if (attr)
2522                         opt_port_ifindex = nla_get_u32(attr);
2523
2524                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2525                 if (attr) {
2526                         opt_is_array = true;
2527                         opt_array_index = nla_get_u32(attr);
2528                 }
2529
2530                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2531                         struct team_option *option = opt_inst->option;
2532                         struct team_gsetter_ctx ctx;
2533                         struct team_option_inst_info *opt_inst_info;
2534                         int tmp_ifindex;
2535
2536                         opt_inst_info = &opt_inst->info;
2537                         tmp_ifindex = opt_inst_info->port ?
2538                                       opt_inst_info->port->dev->ifindex : 0;
2539                         if (option->type != opt_type ||
2540                             strcmp(option->name, opt_name) ||
2541                             tmp_ifindex != opt_port_ifindex ||
2542                             (option->array_size && !opt_is_array) ||
2543                             opt_inst_info->array_index != opt_array_index)
2544                                 continue;
2545                         opt_found = true;
2546                         ctx.info = opt_inst_info;
2547                         switch (opt_type) {
2548                         case TEAM_OPTION_TYPE_U32:
2549                                 ctx.data.u32_val = nla_get_u32(attr_data);
2550                                 break;
2551                         case TEAM_OPTION_TYPE_STRING:
2552                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2553                                         err = -EINVAL;
2554                                         goto team_put;
2555                                 }
2556                                 ctx.data.str_val = nla_data(attr_data);
2557                                 break;
2558                         case TEAM_OPTION_TYPE_BINARY:
2559                                 ctx.data.bin_val.len = nla_len(attr_data);
2560                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2561                                 break;
2562                         case TEAM_OPTION_TYPE_BOOL:
2563                                 ctx.data.bool_val = attr_data ? true : false;
2564                                 break;
2565                         case TEAM_OPTION_TYPE_S32:
2566                                 ctx.data.s32_val = nla_get_s32(attr_data);
2567                                 break;
2568                         default:
2569                                 BUG();
2570                         }
2571                         err = team_option_set(team, opt_inst, &ctx);
2572                         if (err)
2573                                 goto team_put;
2574                         opt_inst->changed = true;
2575
2576                         /* dumb/evil user-space can send us duplicate opt,
2577                          * keep only the last one
2578                          */
2579                         if (__team_option_inst_tmp_find(&opt_inst_list,
2580                                                         opt_inst))
2581                                 continue;
2582
2583                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2584                 }
2585                 if (!opt_found) {
2586                         err = -ENOENT;
2587                         goto team_put;
2588                 }
2589         }
2590
2591         err = team_nl_send_event_options_get(team, &opt_inst_list);
2592
2593 team_put:
2594         team_nl_team_put(team);
2595 rtnl_unlock:
2596         rtnl_unlock();
2597         return err;
2598 }
2599
2600 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2601                                      struct team_port *port)
2602 {
2603         struct nlattr *port_item;
2604
2605         port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2606         if (!port_item)
2607                 goto nest_cancel;
2608         if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2609                 goto nest_cancel;
2610         if (port->changed) {
2611                 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2612                         goto nest_cancel;
2613                 port->changed = false;
2614         }
2615         if ((port->removed &&
2616              nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2617             (port->state.linkup &&
2618              nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2619             nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2620             nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2621                 goto nest_cancel;
2622         nla_nest_end(skb, port_item);
2623         return 0;
2624
2625 nest_cancel:
2626         nla_nest_cancel(skb, port_item);
2627         return -EMSGSIZE;
2628 }
2629
2630 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2631                                       int flags, team_nl_send_func_t *send_func,
2632                                       struct team_port *one_port)
2633 {
2634         struct nlattr *port_list;
2635         struct nlmsghdr *nlh;
2636         void *hdr;
2637         struct team_port *port;
2638         int err;
2639         struct sk_buff *skb = NULL;
2640         bool incomplete;
2641         int i;
2642
2643         port = list_first_entry_or_null(&team->port_list,
2644                                         struct team_port, list);
2645
2646 start_again:
2647         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2648         if (err)
2649                 return err;
2650
2651         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2652                           TEAM_CMD_PORT_LIST_GET);
2653         if (!hdr) {
2654                 nlmsg_free(skb);
2655                 return -EMSGSIZE;
2656         }
2657
2658         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2659                 goto nla_put_failure;
2660         port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2661         if (!port_list)
2662                 goto nla_put_failure;
2663
2664         i = 0;
2665         incomplete = false;
2666
2667         /* If one port is selected, called wants to send port list containing
2668          * only this port. Otherwise go through all listed ports and send all
2669          */
2670         if (one_port) {
2671                 err = team_nl_fill_one_port_get(skb, one_port);
2672                 if (err)
2673                         goto errout;
2674         } else if (port) {
2675                 list_for_each_entry_from(port, &team->port_list, list) {
2676                         err = team_nl_fill_one_port_get(skb, port);
2677                         if (err) {
2678                                 if (err == -EMSGSIZE) {
2679                                         if (!i)
2680                                                 goto errout;
2681                                         incomplete = true;
2682                                         break;
2683                                 }
2684                                 goto errout;
2685                         }
2686                         i++;
2687                 }
2688         }
2689
2690         nla_nest_end(skb, port_list);
2691         genlmsg_end(skb, hdr);
2692         if (incomplete)
2693                 goto start_again;
2694
2695 send_done:
2696         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2697         if (!nlh) {
2698                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2699                 if (err)
2700                         return err;
2701                 goto send_done;
2702         }
2703
2704         return send_func(skb, team, portid);
2705
2706 nla_put_failure:
2707         err = -EMSGSIZE;
2708 errout:
2709         genlmsg_cancel(skb, hdr);
2710         nlmsg_free(skb);
2711         return err;
2712 }
2713
2714 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2715                                      struct genl_info *info)
2716 {
2717         struct team *team;
2718         int err;
2719
2720         team = team_nl_team_get(info);
2721         if (!team)
2722                 return -EINVAL;
2723
2724         err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2725                                          NLM_F_ACK, team_nl_send_unicast, NULL);
2726
2727         team_nl_team_put(team);
2728
2729         return err;
2730 }
2731
2732 static const struct genl_ops team_nl_ops[] = {
2733         {
2734                 .cmd = TEAM_CMD_NOOP,
2735                 .doit = team_nl_cmd_noop,
2736                 .policy = team_nl_policy,
2737         },
2738         {
2739                 .cmd = TEAM_CMD_OPTIONS_SET,
2740                 .doit = team_nl_cmd_options_set,
2741                 .policy = team_nl_policy,
2742                 .flags = GENL_ADMIN_PERM,
2743         },
2744         {
2745                 .cmd = TEAM_CMD_OPTIONS_GET,
2746                 .doit = team_nl_cmd_options_get,
2747                 .policy = team_nl_policy,
2748                 .flags = GENL_ADMIN_PERM,
2749         },
2750         {
2751                 .cmd = TEAM_CMD_PORT_LIST_GET,
2752                 .doit = team_nl_cmd_port_list_get,
2753                 .policy = team_nl_policy,
2754                 .flags = GENL_ADMIN_PERM,
2755         },
2756 };
2757
2758 static const struct genl_multicast_group team_nl_mcgrps[] = {
2759         { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2760 };
2761
2762 static struct genl_family team_nl_family __ro_after_init = {
2763         .name           = TEAM_GENL_NAME,
2764         .version        = TEAM_GENL_VERSION,
2765         .maxattr        = TEAM_ATTR_MAX,
2766         .netnsok        = true,
2767         .module         = THIS_MODULE,
2768         .ops            = team_nl_ops,
2769         .n_ops          = ARRAY_SIZE(team_nl_ops),
2770         .mcgrps         = team_nl_mcgrps,
2771         .n_mcgrps       = ARRAY_SIZE(team_nl_mcgrps),
2772 };
2773
2774 static int team_nl_send_multicast(struct sk_buff *skb,
2775                                   struct team *team, u32 portid)
2776 {
2777         return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2778                                        skb, 0, 0, GFP_KERNEL);
2779 }
2780
2781 static int team_nl_send_event_options_get(struct team *team,
2782                                           struct list_head *sel_opt_inst_list)
2783 {
2784         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2785                                         sel_opt_inst_list);
2786 }
2787
2788 static int team_nl_send_event_port_get(struct team *team,
2789                                        struct team_port *port)
2790 {
2791         return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2792                                           port);
2793 }
2794
2795 static int __init team_nl_init(void)
2796 {
2797         return genl_register_family(&team_nl_family);
2798 }
2799
2800 static void team_nl_fini(void)
2801 {
2802         genl_unregister_family(&team_nl_family);
2803 }
2804
2805
2806 /******************
2807  * Change checkers
2808  ******************/
2809
2810 static void __team_options_change_check(struct team *team)
2811 {
2812         int err;
2813         struct team_option_inst *opt_inst;
2814         LIST_HEAD(sel_opt_inst_list);
2815
2816         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2817                 if (opt_inst->changed)
2818                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2819         }
2820         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2821         if (err && err != -ESRCH)
2822                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2823                             err);
2824 }
2825
2826 /* rtnl lock is held */
2827
2828 static void __team_port_change_send(struct team_port *port, bool linkup)
2829 {
2830         int err;
2831
2832         port->changed = true;
2833         port->state.linkup = linkup;
2834         team_refresh_port_linkup(port);
2835         if (linkup) {
2836                 struct ethtool_link_ksettings ecmd;
2837
2838                 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2839                 if (!err) {
2840                         port->state.speed = ecmd.base.speed;
2841                         port->state.duplex = ecmd.base.duplex;
2842                         goto send_event;
2843                 }
2844         }
2845         port->state.speed = 0;
2846         port->state.duplex = 0;
2847
2848 send_event:
2849         err = team_nl_send_event_port_get(port->team, port);
2850         if (err && err != -ESRCH)
2851                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2852                             port->dev->name, err);
2853
2854 }
2855
2856 static void __team_carrier_check(struct team *team)
2857 {
2858         struct team_port *port;
2859         bool team_linkup;
2860
2861         if (team->user_carrier_enabled)
2862                 return;
2863
2864         team_linkup = false;
2865         list_for_each_entry(port, &team->port_list, list) {
2866                 if (port->linkup) {
2867                         team_linkup = true;
2868                         break;
2869                 }
2870         }
2871
2872         if (team_linkup)
2873                 netif_carrier_on(team->dev);
2874         else
2875                 netif_carrier_off(team->dev);
2876 }
2877
2878 static void __team_port_change_check(struct team_port *port, bool linkup)
2879 {
2880         if (port->state.linkup != linkup)
2881                 __team_port_change_send(port, linkup);
2882         __team_carrier_check(port->team);
2883 }
2884
2885 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2886 {
2887         __team_port_change_send(port, linkup);
2888         __team_carrier_check(port->team);
2889 }
2890
2891 static void __team_port_change_port_removed(struct team_port *port)
2892 {
2893         port->removed = true;
2894         __team_port_change_send(port, false);
2895         __team_carrier_check(port->team);
2896 }
2897
2898 static void team_port_change_check(struct team_port *port, bool linkup)
2899 {
2900         struct team *team = port->team;
2901
2902         mutex_lock(&team->lock);
2903         __team_port_change_check(port, linkup);
2904         mutex_unlock(&team->lock);
2905 }
2906
2907
2908 /************************************
2909  * Net device notifier event handler
2910  ************************************/
2911
2912 static int team_device_event(struct notifier_block *unused,
2913                              unsigned long event, void *ptr)
2914 {
2915         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2916         struct team_port *port;
2917
2918         port = team_port_get_rtnl(dev);
2919         if (!port)
2920                 return NOTIFY_DONE;
2921
2922         switch (event) {
2923         case NETDEV_UP:
2924                 if (netif_carrier_ok(dev))
2925                         team_port_change_check(port, true);
2926                 break;
2927         case NETDEV_DOWN:
2928                 team_port_change_check(port, false);
2929                 break;
2930         case NETDEV_CHANGE:
2931                 if (netif_running(port->dev))
2932                         team_port_change_check(port,
2933                                                !!netif_carrier_ok(port->dev));
2934                 break;
2935         case NETDEV_UNREGISTER:
2936                 team_del_slave(port->team->dev, dev);
2937                 break;
2938         case NETDEV_FEAT_CHANGE:
2939                 team_compute_features(port->team);
2940                 break;
2941         case NETDEV_PRECHANGEMTU:
2942                 /* Forbid to change mtu of underlaying device */
2943                 if (!port->team->port_mtu_change_allowed)
2944                         return NOTIFY_BAD;
2945                 break;
2946         case NETDEV_PRE_TYPE_CHANGE:
2947                 /* Forbid to change type of underlaying device */
2948                 return NOTIFY_BAD;
2949         case NETDEV_RESEND_IGMP:
2950                 /* Propagate to master device */
2951                 call_netdevice_notifiers(event, port->team->dev);
2952                 break;
2953         }
2954         return NOTIFY_DONE;
2955 }
2956
2957 static struct notifier_block team_notifier_block __read_mostly = {
2958         .notifier_call = team_device_event,
2959 };
2960
2961
2962 /***********************
2963  * Module init and exit
2964  ***********************/
2965
2966 static int __init team_module_init(void)
2967 {
2968         int err;
2969
2970         register_netdevice_notifier(&team_notifier_block);
2971
2972         err = rtnl_link_register(&team_link_ops);
2973         if (err)
2974                 goto err_rtnl_reg;
2975
2976         err = team_nl_init();
2977         if (err)
2978                 goto err_nl_init;
2979
2980         return 0;
2981
2982 err_nl_init:
2983         rtnl_link_unregister(&team_link_ops);
2984
2985 err_rtnl_reg:
2986         unregister_netdevice_notifier(&team_notifier_block);
2987
2988         return err;
2989 }
2990
2991 static void __exit team_module_exit(void)
2992 {
2993         team_nl_fini();
2994         rtnl_link_unregister(&team_link_ops);
2995         unregister_netdevice_notifier(&team_notifier_block);
2996 }
2997
2998 module_init(team_module_init);
2999 module_exit(team_module_exit);
3000
3001 MODULE_LICENSE("GPL v2");
3002 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
3003 MODULE_DESCRIPTION("Ethernet team device driver");
3004 MODULE_ALIAS_RTNL_LINK(DRV_NAME);