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