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 <generated/utsrelease.h>
  32 #include <linux/if_team.h>
  33
  34 #define DRV_NAME "team"
  35
  36
  37 /**********
  38  * Helpers
  39  **********/
  40
  41 #define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT)
  42
  43 static struct team_port *team_port_get_rcu(const struct net_device *dev)
  44 {
  45         struct team_port *port = rcu_dereference(dev->rx_handler_data);
  46
  47         return team_port_exists(dev) ? port : NULL;
  48 }
  49
  50 static struct team_port *team_port_get_rtnl(const struct net_device *dev)
  51 {
  52         struct team_port *port = rtnl_dereference(dev->rx_handler_data);
  53
  54         return team_port_exists(dev) ? port : NULL;
  55 }
  56
  57 /*
  58  * Since the ability to change device address for open port device is tested in
  59  * team_port_add, this function can be called without control of return value
  60  */
  61 static int __set_port_dev_addr(struct net_device *port_dev,
  62                                const unsigned char *dev_addr)
  63 {
  64         struct sockaddr addr;
  65
  66         memcpy(addr.sa_data, dev_addr, port_dev->addr_len);
  67         addr.sa_family = port_dev->type;
  68         return dev_set_mac_address(port_dev, &addr);
  69 }
  70
  71 static int team_port_set_orig_dev_addr(struct team_port *port)
  72 {
  73         return __set_port_dev_addr(port->dev, port->orig.dev_addr);
  74 }
  75
  76 static int team_port_set_team_dev_addr(struct team *team,
  77                                        struct team_port *port)
  78 {
  79         return __set_port_dev_addr(port->dev, team->dev->dev_addr);
  80 }
  81
  82 int team_modeop_port_enter(struct team *team, struct team_port *port)
  83 {
  84         return team_port_set_team_dev_addr(team, port);
  85 }
  86 EXPORT_SYMBOL(team_modeop_port_enter);
  87
  88 void team_modeop_port_change_dev_addr(struct team *team,
  89                                       struct team_port *port)
  90 {
  91         team_port_set_team_dev_addr(team, port);
  92 }
  93 EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
  94
  95 static void team_refresh_port_linkup(struct team_port *port)
  96 {
  97         port->linkup = port->user.linkup_enabled ? port->user.linkup :
  98                                                    port->state.linkup;
  99 }
 100
 101
 102 /*******************
 103  * Options handling
 104  *******************/
 105
 106 struct team_option_inst { /* One for each option instance */
 107         struct list_head list;
 108         struct list_head tmp_list;
 109         struct team_option *option;
 110         struct team_option_inst_info info;
 111         bool changed;
 112         bool removed;
 113 };
 114
 115 static struct team_option *__team_find_option(struct team *team,
 116                                               const char *opt_name)
 117 {
 118         struct team_option *option;
 119
 120         list_for_each_entry(option, &team->option_list, list) {
 121                 if (strcmp(option->name, opt_name) == 0)
 122                         return option;
 123         }
 124         return NULL;
 125 }
 126
 127 static void __team_option_inst_del(struct team_option_inst *opt_inst)
 128 {
 129         list_del(&opt_inst->list);
 130         kfree(opt_inst);
 131 }
 132
 133 static void __team_option_inst_del_option(struct team *team,
 134                                           struct team_option *option)
 135 {
 136         struct team_option_inst *opt_inst, *tmp;
 137
 138         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 139                 if (opt_inst->option == option)
 140                         __team_option_inst_del(opt_inst);
 141         }
 142 }
 143
 144 static int __team_option_inst_add(struct team *team, struct team_option *option,
 145                                   struct team_port *port)
 146 {
 147         struct team_option_inst *opt_inst;
 148         unsigned int array_size;
 149         unsigned int i;
 150         int err;
 151
 152         array_size = option->array_size;
 153         if (!array_size)
 154                 array_size = 1; /* No array but still need one instance */
 155
 156         for (i = 0; i < array_size; i++) {
 157                 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
 158                 if (!opt_inst)
 159                         return -ENOMEM;
 160                 opt_inst->option = option;
 161                 opt_inst->info.port = port;
 162                 opt_inst->info.array_index = i;
 163                 opt_inst->changed = true;
 164                 opt_inst->removed = false;
 165                 list_add_tail(&opt_inst->list, &team->option_inst_list);
 166                 if (option->init) {
 167                         err = option->init(team, &opt_inst->info);
 168                         if (err)
 169                                 return err;
 170                 }
 171
 172         }
 173         return 0;
 174 }
 175
 176 static int __team_option_inst_add_option(struct team *team,
 177                                          struct team_option *option)
 178 {
 179         struct team_port *port;
 180         int err;
 181
 182         if (!option->per_port) {
 183                 err = __team_option_inst_add(team, option, NULL);
 184                 if (err)
 185                         goto inst_del_option;
 186         }
 187
 188         list_for_each_entry(port, &team->port_list, list) {
 189                 err = __team_option_inst_add(team, option, port);
 190                 if (err)
 191                         goto inst_del_option;
 192         }
 193         return 0;
 194
 195 inst_del_option:
 196         __team_option_inst_del_option(team, option);
 197         return err;
 198 }
 199
 200 static void __team_option_inst_mark_removed_option(struct team *team,
 201                                                    struct team_option *option)
 202 {
 203         struct team_option_inst *opt_inst;
 204
 205         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 206                 if (opt_inst->option == option) {
 207                         opt_inst->changed = true;
 208                         opt_inst->removed = true;
 209                 }
 210         }
 211 }
 212
 213 static void __team_option_inst_del_port(struct team *team,
 214                                         struct team_port *port)
 215 {
 216         struct team_option_inst *opt_inst, *tmp;
 217
 218         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 219                 if (opt_inst->option->per_port &&
 220                     opt_inst->info.port == port)
 221                         __team_option_inst_del(opt_inst);
 222         }
 223 }
 224
 225 static int __team_option_inst_add_port(struct team *team,
 226                                        struct team_port *port)
 227 {
 228         struct team_option *option;
 229         int err;
 230
 231         list_for_each_entry(option, &team->option_list, list) {
 232                 if (!option->per_port)
 233                         continue;
 234                 err = __team_option_inst_add(team, option, port);
 235                 if (err)
 236                         goto inst_del_port;
 237         }
 238         return 0;
 239
 240 inst_del_port:
 241         __team_option_inst_del_port(team, port);
 242         return err;
 243 }
 244
 245 static void __team_option_inst_mark_removed_port(struct team *team,
 246                                                  struct team_port *port)
 247 {
 248         struct team_option_inst *opt_inst;
 249
 250         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 251                 if (opt_inst->info.port == port) {
 252                         opt_inst->changed = true;
 253                         opt_inst->removed = true;
 254                 }
 255         }
 256 }
 257
 258 static int __team_options_register(struct team *team,
 259                                    const struct team_option *option,
 260                                    size_t option_count)
 261 {
 262         int i;
 263         struct team_option **dst_opts;
 264         int err;
 265
 266         dst_opts = kzalloc(sizeof(struct team_option *) * option_count,
 267                            GFP_KERNEL);
 268         if (!dst_opts)
 269                 return -ENOMEM;
 270         for (i = 0; i < option_count; i++, option++) {
 271                 if (__team_find_option(team, option->name)) {
 272                         err = -EEXIST;
 273                         goto alloc_rollback;
 274                 }
 275                 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
 276                 if (!dst_opts[i]) {
 277                         err = -ENOMEM;
 278                         goto alloc_rollback;
 279                 }
 280         }
 281
 282         for (i = 0; i < option_count; i++) {
 283                 err = __team_option_inst_add_option(team, dst_opts[i]);
 284                 if (err)
 285                         goto inst_rollback;
 286                 list_add_tail(&dst_opts[i]->list, &team->option_list);
 287         }
 288
 289         kfree(dst_opts);
 290         return 0;
 291
 292 inst_rollback:
 293         for (i--; i >= 0; i--)
 294                 __team_option_inst_del_option(team, dst_opts[i]);
 295
 296         i = option_count - 1;
 297 alloc_rollback:
 298         for (i--; i >= 0; i--)
 299                 kfree(dst_opts[i]);
 300
 301         kfree(dst_opts);
 302         return err;
 303 }
 304
 305 static void __team_options_mark_removed(struct team *team,
 306                                         const struct team_option *option,
 307                                         size_t option_count)
 308 {
 309         int i;
 310
 311         for (i = 0; i < option_count; i++, option++) {
 312                 struct team_option *del_opt;
 313
 314                 del_opt = __team_find_option(team, option->name);
 315                 if (del_opt)
 316                         __team_option_inst_mark_removed_option(team, del_opt);
 317         }
 318 }
 319
 320 static void __team_options_unregister(struct team *team,
 321                                       const struct team_option *option,
 322                                       size_t option_count)
 323 {
 324         int i;
 325
 326         for (i = 0; i < option_count; i++, option++) {
 327                 struct team_option *del_opt;
 328
 329                 del_opt = __team_find_option(team, option->name);
 330                 if (del_opt) {
 331                         __team_option_inst_del_option(team, del_opt);
 332                         list_del(&del_opt->list);
 333                         kfree(del_opt);
 334                 }
 335         }
 336 }
 337
 338 static void __team_options_change_check(struct team *team);
 339
 340 int team_options_register(struct team *team,
 341                           const struct team_option *option,
 342                           size_t option_count)
 343 {
 344         int err;
 345
 346         err = __team_options_register(team, option, option_count);
 347         if (err)
 348                 return err;
 349         __team_options_change_check(team);
 350         return 0;
 351 }
 352 EXPORT_SYMBOL(team_options_register);
 353
 354 void team_options_unregister(struct team *team,
 355                              const struct team_option *option,
 356                              size_t option_count)
 357 {
 358         __team_options_mark_removed(team, option, option_count);
 359         __team_options_change_check(team);
 360         __team_options_unregister(team, option, option_count);
 361 }
 362 EXPORT_SYMBOL(team_options_unregister);
 363
 364 static int team_option_get(struct team *team,
 365                            struct team_option_inst *opt_inst,
 366                            struct team_gsetter_ctx *ctx)
 367 {
 368         if (!opt_inst->option->getter)
 369                 return -EOPNOTSUPP;
 370         return opt_inst->option->getter(team, ctx);
 371 }
 372
 373 static int team_option_set(struct team *team,
 374                            struct team_option_inst *opt_inst,
 375                            struct team_gsetter_ctx *ctx)
 376 {
 377         if (!opt_inst->option->setter)
 378                 return -EOPNOTSUPP;
 379         return opt_inst->option->setter(team, ctx);
 380 }
 381
 382 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
 383 {
 384         struct team_option_inst *opt_inst;
 385
 386         opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
 387         opt_inst->changed = true;
 388 }
 389 EXPORT_SYMBOL(team_option_inst_set_change);
 390
 391 void team_options_change_check(struct team *team)
 392 {
 393         __team_options_change_check(team);
 394 }
 395 EXPORT_SYMBOL(team_options_change_check);
 396
 397
 398 /****************
 399  * Mode handling
 400  ****************/
 401
 402 static LIST_HEAD(mode_list);
 403 static DEFINE_SPINLOCK(mode_list_lock);
 404
 405 struct team_mode_item {
 406         struct list_head list;
 407         const struct team_mode *mode;
 408 };
 409
 410 static struct team_mode_item *__find_mode(const char *kind)
 411 {
 412         struct team_mode_item *mitem;
 413
 414         list_for_each_entry(mitem, &mode_list, list) {
 415                 if (strcmp(mitem->mode->kind, kind) == 0)
 416                         return mitem;
 417         }
 418         return NULL;
 419 }
 420
 421 static bool is_good_mode_name(const char *name)
 422 {
 423         while (*name != '\0') {
 424                 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
 425                         return false;
 426                 name++;
 427         }
 428         return true;
 429 }
 430
 431 int team_mode_register(const struct team_mode *mode)
 432 {
 433         int err = 0;
 434         struct team_mode_item *mitem;
 435
 436         if (!is_good_mode_name(mode->kind) ||
 437             mode->priv_size > TEAM_MODE_PRIV_SIZE)
 438                 return -EINVAL;
 439
 440         mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
 441         if (!mitem)
 442                 return -ENOMEM;
 443
 444         spin_lock(&mode_list_lock);
 445         if (__find_mode(mode->kind)) {
 446                 err = -EEXIST;
 447                 kfree(mitem);
 448                 goto unlock;
 449         }
 450         mitem->mode = mode;
 451         list_add_tail(&mitem->list, &mode_list);
 452 unlock:
 453         spin_unlock(&mode_list_lock);
 454         return err;
 455 }
 456 EXPORT_SYMBOL(team_mode_register);
 457
 458 void team_mode_unregister(const struct team_mode *mode)
 459 {
 460         struct team_mode_item *mitem;
 461
 462         spin_lock(&mode_list_lock);
 463         mitem = __find_mode(mode->kind);
 464         if (mitem) {
 465                 list_del_init(&mitem->list);
 466                 kfree(mitem);
 467         }
 468         spin_unlock(&mode_list_lock);
 469 }
 470 EXPORT_SYMBOL(team_mode_unregister);
 471
 472 static const struct team_mode *team_mode_get(const char *kind)
 473 {
 474         struct team_mode_item *mitem;
 475         const struct team_mode *mode = NULL;
 476
 477         spin_lock(&mode_list_lock);
 478         mitem = __find_mode(kind);
 479         if (!mitem) {
 480                 spin_unlock(&mode_list_lock);
 481                 request_module("team-mode-%s", kind);
 482                 spin_lock(&mode_list_lock);
 483                 mitem = __find_mode(kind);
 484         }
 485         if (mitem) {
 486                 mode = mitem->mode;
 487                 if (!try_module_get(mode->owner))
 488                         mode = NULL;
 489         }
 490
 491         spin_unlock(&mode_list_lock);
 492         return mode;
 493 }
 494
 495 static void team_mode_put(const struct team_mode *mode)
 496 {
 497         module_put(mode->owner);
 498 }
 499
 500 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
 501 {
 502         dev_kfree_skb_any(skb);
 503         return false;
 504 }
 505
 506 static rx_handler_result_t team_dummy_receive(struct team *team,
 507                                               struct team_port *port,
 508                                               struct sk_buff *skb)
 509 {
 510         return RX_HANDLER_ANOTHER;
 511 }
 512
 513 static const struct team_mode __team_no_mode = {
 514         .kind           = "*NOMODE*",
 515 };
 516
 517 static bool team_is_mode_set(struct team *team)
 518 {
 519         return team->mode != &__team_no_mode;
 520 }
 521
 522 static void team_set_no_mode(struct team *team)
 523 {
 524         team->user_carrier_enabled = false;
 525         team->mode = &__team_no_mode;
 526 }
 527
 528 static void team_adjust_ops(struct team *team)
 529 {
 530         /*
 531          * To avoid checks in rx/tx skb paths, ensure here that non-null and
 532          * correct ops are always set.
 533          */
 534
 535         if (!team->en_port_count || !team_is_mode_set(team) ||
 536             !team->mode->ops->transmit)
 537                 team->ops.transmit = team_dummy_transmit;
 538         else
 539                 team->ops.transmit = team->mode->ops->transmit;
 540
 541         if (!team->en_port_count || !team_is_mode_set(team) ||
 542             !team->mode->ops->receive)
 543                 team->ops.receive = team_dummy_receive;
 544         else
 545                 team->ops.receive = team->mode->ops->receive;
 546 }
 547
 548 /*
 549  * We can benefit from the fact that it's ensured no port is present
 550  * at the time of mode change. Therefore no packets are in fly so there's no
 551  * need to set mode operations in any special way.
 552  */
 553 static int __team_change_mode(struct team *team,
 554                               const struct team_mode *new_mode)
 555 {
 556         /* Check if mode was previously set and do cleanup if so */
 557         if (team_is_mode_set(team)) {
 558                 void (*exit_op)(struct team *team) = team->ops.exit;
 559
 560                 /* Clear ops area so no callback is called any longer */
 561                 memset(&team->ops, 0, sizeof(struct team_mode_ops));
 562                 team_adjust_ops(team);
 563
 564                 if (exit_op)
 565                         exit_op(team);
 566                 team_mode_put(team->mode);
 567                 team_set_no_mode(team);
 568                 /* zero private data area */
 569                 memset(&team->mode_priv, 0,
 570                        sizeof(struct team) - offsetof(struct team, mode_priv));
 571         }
 572
 573         if (!new_mode)
 574                 return 0;
 575
 576         if (new_mode->ops->init) {
 577                 int err;
 578
 579                 err = new_mode->ops->init(team);
 580                 if (err)
 581                         return err;
 582         }
 583
 584         team->mode = new_mode;
 585         memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
 586         team_adjust_ops(team);
 587
 588         return 0;
 589 }
 590
 591 static int team_change_mode(struct team *team, const char *kind)
 592 {
 593         const struct team_mode *new_mode;
 594         struct net_device *dev = team->dev;
 595         int err;
 596
 597         if (!list_empty(&team->port_list)) {
 598                 netdev_err(dev, "No ports can be present during mode change\n");
 599                 return -EBUSY;
 600         }
 601
 602         if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
 603                 netdev_err(dev, "Unable to change to the same mode the team is in\n");
 604                 return -EINVAL;
 605         }
 606
 607         new_mode = team_mode_get(kind);
 608         if (!new_mode) {
 609                 netdev_err(dev, "Mode \"%s\" not found\n", kind);
 610                 return -EINVAL;
 611         }
 612
 613         err = __team_change_mode(team, new_mode);
 614         if (err) {
 615                 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
 616                 team_mode_put(new_mode);
 617                 return err;
 618         }
 619
 620         netdev_info(dev, "Mode changed to \"%s\"\n", kind);
 621         return 0;
 622 }
 623
 624
 625 /*********************
 626  * Peers notification
 627  *********************/
 628
 629 static void team_notify_peers_work(struct work_struct *work)
 630 {
 631         struct team *team;
 632         int val;
 633
 634         team = container_of(work, struct team, notify_peers.dw.work);
 635
 636         if (!rtnl_trylock()) {
 637                 schedule_delayed_work(&team->notify_peers.dw, 0);
 638                 return;
 639         }
 640         val = atomic_dec_if_positive(&team->notify_peers.count_pending);
 641         if (val < 0) {
 642                 rtnl_unlock();
 643                 return;
 644         }
 645         call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
 646         rtnl_unlock();
 647         if (val)
 648                 schedule_delayed_work(&team->notify_peers.dw,
 649                                       msecs_to_jiffies(team->notify_peers.interval));
 650 }
 651
 652 static void team_notify_peers(struct team *team)
 653 {
 654         if (!team->notify_peers.count || !netif_running(team->dev))
 655                 return;
 656         atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
 657         schedule_delayed_work(&team->notify_peers.dw, 0);
 658 }
 659
 660 static void team_notify_peers_init(struct team *team)
 661 {
 662         INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
 663 }
 664
 665 static void team_notify_peers_fini(struct team *team)
 666 {
 667         cancel_delayed_work_sync(&team->notify_peers.dw);
 668 }
 669
 670
 671 /*******************************
 672  * Send multicast group rejoins
 673  *******************************/
 674
 675 static void team_mcast_rejoin_work(struct work_struct *work)
 676 {
 677         struct team *team;
 678         int val;
 679
 680         team = container_of(work, struct team, mcast_rejoin.dw.work);
 681
 682         if (!rtnl_trylock()) {
 683                 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 684                 return;
 685         }
 686         val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending);
 687         if (val < 0) {
 688                 rtnl_unlock();
 689                 return;
 690         }
 691         call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
 692         rtnl_unlock();
 693         if (val)
 694                 schedule_delayed_work(&team->mcast_rejoin.dw,
 695                                       msecs_to_jiffies(team->mcast_rejoin.interval));
 696 }
 697
 698 static void team_mcast_rejoin(struct team *team)
 699 {
 700         if (!team->mcast_rejoin.count || !netif_running(team->dev))
 701                 return;
 702         atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
 703         schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 704 }
 705
 706 static void team_mcast_rejoin_init(struct team *team)
 707 {
 708         INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
 709 }
 710
 711 static void team_mcast_rejoin_fini(struct team *team)
 712 {
 713         cancel_delayed_work_sync(&team->mcast_rejoin.dw);
 714 }
 715
 716
 717 /************************
 718  * Rx path frame handler
 719  ************************/
 720
 721 /* note: already called with rcu_read_lock */
 722 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
 723 {
 724         struct sk_buff *skb = *pskb;
 725         struct team_port *port;
 726         struct team *team;
 727         rx_handler_result_t res;
 728
 729         skb = skb_share_check(skb, GFP_ATOMIC);
 730         if (!skb)
 731                 return RX_HANDLER_CONSUMED;
 732
 733         *pskb = skb;
 734
 735         port = team_port_get_rcu(skb->dev);
 736         team = port->team;
 737         if (!team_port_enabled(port)) {
 738                 /* allow exact match delivery for disabled ports */
 739                 res = RX_HANDLER_EXACT;
 740         } else {
 741                 res = team->ops.receive(team, port, skb);
 742         }
 743         if (res == RX_HANDLER_ANOTHER) {
 744                 struct team_pcpu_stats *pcpu_stats;
 745
 746                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
 747                 u64_stats_update_begin(&pcpu_stats->syncp);
 748                 pcpu_stats->rx_packets++;
 749                 pcpu_stats->rx_bytes += skb->len;
 750                 if (skb->pkt_type == PACKET_MULTICAST)
 751                         pcpu_stats->rx_multicast++;
 752                 u64_stats_update_end(&pcpu_stats->syncp);
 753
 754                 skb->dev = team->dev;
 755         } else {
 756                 this_cpu_inc(team->pcpu_stats->rx_dropped);
 757         }
 758
 759         return res;
 760 }
 761
 762
 763 /*************************************
 764  * Multiqueue Tx port select override
 765  *************************************/
 766
 767 static int team_queue_override_init(struct team *team)
 768 {
 769         struct list_head *listarr;
 770         unsigned int queue_cnt = team->dev->num_tx_queues - 1;
 771         unsigned int i;
 772
 773         if (!queue_cnt)
 774                 return 0;
 775         listarr = kmalloc(sizeof(struct list_head) * queue_cnt, GFP_KERNEL);
 776         if (!listarr)
 777                 return -ENOMEM;
 778         team->qom_lists = listarr;
 779         for (i = 0; i < queue_cnt; i++)
 780                 INIT_LIST_HEAD(listarr++);
 781         return 0;
 782 }
 783
 784 static void team_queue_override_fini(struct team *team)
 785 {
 786         kfree(team->qom_lists);
 787 }
 788
 789 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
 790 {
 791         return &team->qom_lists[queue_id - 1];
 792 }
 793
 794 /*
 795  * note: already called with rcu_read_lock
 796  */
 797 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
 798 {
 799         struct list_head *qom_list;
 800         struct team_port *port;
 801
 802         if (!team->queue_override_enabled || !skb->queue_mapping)
 803                 return false;
 804         qom_list = __team_get_qom_list(team, skb->queue_mapping);
 805         list_for_each_entry_rcu(port, qom_list, qom_list) {
 806                 if (!team_dev_queue_xmit(team, port, skb))
 807                         return true;
 808         }
 809         return false;
 810 }
 811
 812 static void __team_queue_override_port_del(struct team *team,
 813                                            struct team_port *port)
 814 {
 815         if (!port->queue_id)
 816                 return;
 817         list_del_rcu(&port->qom_list);
 818 }
 819
 820 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
 821                                                       struct team_port *cur)
 822 {
 823         if (port->priority < cur->priority)
 824                 return true;
 825         if (port->priority > cur->priority)
 826                 return false;
 827         if (port->index < cur->index)
 828                 return true;
 829         return false;
 830 }
 831
 832 static void __team_queue_override_port_add(struct team *team,
 833                                            struct team_port *port)
 834 {
 835         struct team_port *cur;
 836         struct list_head *qom_list;
 837         struct list_head *node;
 838
 839         if (!port->queue_id)
 840                 return;
 841         qom_list = __team_get_qom_list(team, port->queue_id);
 842         node = qom_list;
 843         list_for_each_entry(cur, qom_list, qom_list) {
 844                 if (team_queue_override_port_has_gt_prio_than(port, cur))
 845                         break;
 846                 node = &cur->qom_list;
 847         }
 848         list_add_tail_rcu(&port->qom_list, node);
 849 }
 850
 851 static void __team_queue_override_enabled_check(struct team *team)
 852 {
 853         struct team_port *port;
 854         bool enabled = false;
 855
 856         list_for_each_entry(port, &team->port_list, list) {
 857                 if (port->queue_id) {
 858                         enabled = true;
 859                         break;
 860                 }
 861         }
 862         if (enabled == team->queue_override_enabled)
 863                 return;
 864         netdev_dbg(team->dev, "%s queue override\n",
 865                    enabled ? "Enabling" : "Disabling");
 866         team->queue_override_enabled = enabled;
 867 }
 868
 869 static void team_queue_override_port_prio_changed(struct team *team,
 870                                                   struct team_port *port)
 871 {
 872         if (!port->queue_id || team_port_enabled(port))
 873                 return;
 874         __team_queue_override_port_del(team, port);
 875         __team_queue_override_port_add(team, port);
 876         __team_queue_override_enabled_check(team);
 877 }
 878
 879 static void team_queue_override_port_change_queue_id(struct team *team,
 880                                                      struct team_port *port,
 881                                                      u16 new_queue_id)
 882 {
 883         if (team_port_enabled(port)) {
 884                 __team_queue_override_port_del(team, port);
 885                 port->queue_id = new_queue_id;
 886                 __team_queue_override_port_add(team, port);
 887                 __team_queue_override_enabled_check(team);
 888         } else {
 889                 port->queue_id = new_queue_id;
 890         }
 891 }
 892
 893 static void team_queue_override_port_add(struct team *team,
 894                                          struct team_port *port)
 895 {
 896         __team_queue_override_port_add(team, port);
 897         __team_queue_override_enabled_check(team);
 898 }
 899
 900 static void team_queue_override_port_del(struct team *team,
 901                                          struct team_port *port)
 902 {
 903         __team_queue_override_port_del(team, port);
 904         __team_queue_override_enabled_check(team);
 905 }
 906
 907
 908 /****************
 909  * Port handling
 910  ****************/
 911
 912 static bool team_port_find(const struct team *team,
 913                            const struct team_port *port)
 914 {
 915         struct team_port *cur;
 916
 917         list_for_each_entry(cur, &team->port_list, list)
 918                 if (cur == port)
 919                         return true;
 920         return false;
 921 }
 922
 923 /*
 924  * Enable/disable port by adding to enabled port hashlist and setting
 925  * port->index (Might be racy so reader could see incorrect ifindex when
 926  * processing a flying packet, but that is not a problem). Write guarded
 927  * by team->lock.
 928  */
 929 static void team_port_enable(struct team *team,
 930                              struct team_port *port)
 931 {
 932         if (team_port_enabled(port))
 933                 return;
 934         port->index = team->en_port_count++;
 935         hlist_add_head_rcu(&port->hlist,
 936                            team_port_index_hash(team, port->index));
 937         team_adjust_ops(team);
 938         team_queue_override_port_add(team, port);
 939         if (team->ops.port_enabled)
 940                 team->ops.port_enabled(team, port);
 941         team_notify_peers(team);
 942         team_mcast_rejoin(team);
 943 }
 944
 945 static void __reconstruct_port_hlist(struct team *team, int rm_index)
 946 {
 947         int i;
 948         struct team_port *port;
 949
 950         for (i = rm_index + 1; i < team->en_port_count; i++) {
 951                 port = team_get_port_by_index(team, i);
 952                 hlist_del_rcu(&port->hlist);
 953                 port->index--;
 954                 hlist_add_head_rcu(&port->hlist,
 955                                    team_port_index_hash(team, port->index));
 956         }
 957 }
 958
 959 static void team_port_disable(struct team *team,
 960                               struct team_port *port)
 961 {
 962         if (!team_port_enabled(port))
 963                 return;
 964         if (team->ops.port_disabled)
 965                 team->ops.port_disabled(team, port);
 966         hlist_del_rcu(&port->hlist);
 967         __reconstruct_port_hlist(team, port->index);
 968         port->index = -1;
 969         team->en_port_count--;
 970         team_queue_override_port_del(team, port);
 971         team_adjust_ops(team);
 972         team_notify_peers(team);
 973         team_mcast_rejoin(team);
 974 }
 975
 976 #define TEAM_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
 977                             NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
 978                             NETIF_F_HIGHDMA | NETIF_F_LRO)
 979
 980 static void __team_compute_features(struct team *team)
 981 {
 982         struct team_port *port;
 983         u32 vlan_features = TEAM_VLAN_FEATURES & NETIF_F_ALL_FOR_ALL;
 984         unsigned short max_hard_header_len = ETH_HLEN;
 985         unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
 986                                         IFF_XMIT_DST_RELEASE_PERM;
 987
 988         list_for_each_entry(port, &team->port_list, list) {
 989                 vlan_features = netdev_increment_features(vlan_features,
 990                                         port->dev->vlan_features,
 991                                         TEAM_VLAN_FEATURES);
 992
 993                 dst_release_flag &= port->dev->priv_flags;
 994                 if (port->dev->hard_header_len > max_hard_header_len)
 995                         max_hard_header_len = port->dev->hard_header_len;
 996         }
 997
 998         team->dev->vlan_features = vlan_features;
 999         team->dev->hard_header_len = max_hard_header_len;
1000
1001         team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1002         if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1003                 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1004
1005         netdev_change_features(team->dev);
1006 }
1007
1008 static void team_compute_features(struct team *team)
1009 {
1010         mutex_lock(&team->lock);
1011         __team_compute_features(team);
1012         mutex_unlock(&team->lock);
1013 }
1014
1015 static int team_port_enter(struct team *team, struct team_port *port)
1016 {
1017         int err = 0;
1018
1019         dev_hold(team->dev);
1020         if (team->ops.port_enter) {
1021                 err = team->ops.port_enter(team, port);
1022                 if (err) {
1023                         netdev_err(team->dev, "Device %s failed to enter team mode\n",
1024                                    port->dev->name);
1025                         goto err_port_enter;
1026                 }
1027         }
1028
1029         return 0;
1030
1031 err_port_enter:
1032         dev_put(team->dev);
1033
1034         return err;
1035 }
1036
1037 static void team_port_leave(struct team *team, struct team_port *port)
1038 {
1039         if (team->ops.port_leave)
1040                 team->ops.port_leave(team, port);
1041         dev_put(team->dev);
1042 }
1043
1044 #ifdef CONFIG_NET_POLL_CONTROLLER
1045 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1046 {
1047         struct netpoll *np;
1048         int err;
1049
1050         if (!team->dev->npinfo)
1051                 return 0;
1052
1053         np = kzalloc(sizeof(*np), GFP_KERNEL);
1054         if (!np)
1055                 return -ENOMEM;
1056
1057         err = __netpoll_setup(np, port->dev);
1058         if (err) {
1059                 kfree(np);
1060                 return err;
1061         }
1062         port->np = np;
1063         return err;
1064 }
1065
1066 static void team_port_disable_netpoll(struct team_port *port)
1067 {
1068         struct netpoll *np = port->np;
1069
1070         if (!np)
1071                 return;
1072         port->np = NULL;
1073
1074         /* Wait for transmitting packets to finish before freeing. */
1075         synchronize_rcu_bh();
1076         __netpoll_cleanup(np);
1077         kfree(np);
1078 }
1079 #else
1080 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1081 {
1082         return 0;
1083 }
1084 static void team_port_disable_netpoll(struct team_port *port)
1085 {
1086 }
1087 #endif
1088
1089 static int team_upper_dev_link(struct net_device *dev,
1090                                struct net_device *port_dev)
1091 {
1092         int err;
1093
1094         err = netdev_master_upper_dev_link(port_dev, dev);
1095         if (err)
1096                 return err;
1097         port_dev->priv_flags |= IFF_TEAM_PORT;
1098         return 0;
1099 }
1100
1101 static void team_upper_dev_unlink(struct net_device *dev,
1102                                   struct net_device *port_dev)
1103 {
1104         netdev_upper_dev_unlink(port_dev, dev);
1105         port_dev->priv_flags &= ~IFF_TEAM_PORT;
1106 }
1107
1108 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1109 static int team_dev_type_check_change(struct net_device *dev,
1110                                       struct net_device *port_dev);
1111
1112 static int team_port_add(struct team *team, struct net_device *port_dev)
1113 {
1114         struct net_device *dev = team->dev;
1115         struct team_port *port;
1116         char *portname = port_dev->name;
1117         int err;
1118
1119         if (port_dev->flags & IFF_LOOPBACK) {
1120                 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1121                            portname);
1122                 return -EINVAL;
1123         }
1124
1125         if (team_port_exists(port_dev)) {
1126                 netdev_err(dev, "Device %s is already a port "
1127                                 "of a team device\n", portname);
1128                 return -EBUSY;
1129         }
1130
1131         if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1132             vlan_uses_dev(dev)) {
1133                 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1134                            portname);
1135                 return -EPERM;
1136         }
1137
1138         err = team_dev_type_check_change(dev, port_dev);
1139         if (err)
1140                 return err;
1141
1142         if (port_dev->flags & IFF_UP) {
1143                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1144                            portname);
1145                 return -EBUSY;
1146         }
1147
1148         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1149                        GFP_KERNEL);
1150         if (!port)
1151                 return -ENOMEM;
1152
1153         port->dev = port_dev;
1154         port->team = team;
1155         INIT_LIST_HEAD(&port->qom_list);
1156
1157         port->orig.mtu = port_dev->mtu;
1158         err = dev_set_mtu(port_dev, dev->mtu);
1159         if (err) {
1160                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1161                 goto err_set_mtu;
1162         }
1163
1164         memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1165
1166         err = team_port_enter(team, port);
1167         if (err) {
1168                 netdev_err(dev, "Device %s failed to enter team mode\n",
1169                            portname);
1170                 goto err_port_enter;
1171         }
1172
1173         err = dev_open(port_dev);
1174         if (err) {
1175                 netdev_dbg(dev, "Device %s opening failed\n",
1176                            portname);
1177                 goto err_dev_open;
1178         }
1179
1180         err = vlan_vids_add_by_dev(port_dev, dev);
1181         if (err) {
1182                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1183                                 portname);
1184                 goto err_vids_add;
1185         }
1186
1187         err = team_port_enable_netpoll(team, port);
1188         if (err) {
1189                 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1190                            portname);
1191                 goto err_enable_netpoll;
1192         }
1193
1194         if (!(dev->features & NETIF_F_LRO))
1195                 dev_disable_lro(port_dev);
1196
1197         err = netdev_rx_handler_register(port_dev, team_handle_frame,
1198                                          port);
1199         if (err) {
1200                 netdev_err(dev, "Device %s failed to register rx_handler\n",
1201                            portname);
1202                 goto err_handler_register;
1203         }
1204
1205         err = team_upper_dev_link(dev, port_dev);
1206         if (err) {
1207                 netdev_err(dev, "Device %s failed to set upper link\n",
1208                            portname);
1209                 goto err_set_upper_link;
1210         }
1211
1212         err = __team_option_inst_add_port(team, port);
1213         if (err) {
1214                 netdev_err(dev, "Device %s failed to add per-port options\n",
1215                            portname);
1216                 goto err_option_port_add;
1217         }
1218
1219         port->index = -1;
1220         list_add_tail_rcu(&port->list, &team->port_list);
1221         team_port_enable(team, port);
1222         __team_compute_features(team);
1223         __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1224         __team_options_change_check(team);
1225
1226         netdev_info(dev, "Port device %s added\n", portname);
1227
1228         return 0;
1229
1230 err_option_port_add:
1231         team_upper_dev_unlink(dev, port_dev);
1232
1233 err_set_upper_link:
1234         netdev_rx_handler_unregister(port_dev);
1235
1236 err_handler_register:
1237         team_port_disable_netpoll(port);
1238
1239 err_enable_netpoll:
1240         vlan_vids_del_by_dev(port_dev, dev);
1241
1242 err_vids_add:
1243         dev_close(port_dev);
1244
1245 err_dev_open:
1246         team_port_leave(team, port);
1247         team_port_set_orig_dev_addr(port);
1248
1249 err_port_enter:
1250         dev_set_mtu(port_dev, port->orig.mtu);
1251
1252 err_set_mtu:
1253         kfree(port);
1254
1255         return err;
1256 }
1257
1258 static void __team_port_change_port_removed(struct team_port *port);
1259
1260 static int team_port_del(struct team *team, struct net_device *port_dev)
1261 {
1262         struct net_device *dev = team->dev;
1263         struct team_port *port;
1264         char *portname = port_dev->name;
1265
1266         port = team_port_get_rtnl(port_dev);
1267         if (!port || !team_port_find(team, port)) {
1268                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1269                            portname);
1270                 return -ENOENT;
1271         }
1272
1273         team_port_disable(team, port);
1274         list_del_rcu(&port->list);
1275         team_upper_dev_unlink(dev, port_dev);
1276         netdev_rx_handler_unregister(port_dev);
1277         team_port_disable_netpoll(port);
1278         vlan_vids_del_by_dev(port_dev, dev);
1279         dev_uc_unsync(port_dev, dev);
1280         dev_mc_unsync(port_dev, dev);
1281         dev_close(port_dev);
1282         team_port_leave(team, port);
1283
1284         __team_option_inst_mark_removed_port(team, port);
1285         __team_options_change_check(team);
1286         __team_option_inst_del_port(team, port);
1287         __team_port_change_port_removed(port);
1288
1289         team_port_set_orig_dev_addr(port);
1290         dev_set_mtu(port_dev, port->orig.mtu);
1291         kfree_rcu(port, rcu);
1292         netdev_info(dev, "Port device %s removed\n", portname);
1293         __team_compute_features(team);
1294
1295         return 0;
1296 }
1297
1298
1299 /*****************
1300  * Net device ops
1301  *****************/
1302
1303 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1304 {
1305         ctx->data.str_val = team->mode->kind;
1306         return 0;
1307 }
1308
1309 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1310 {
1311         return team_change_mode(team, ctx->data.str_val);
1312 }
1313
1314 static int team_notify_peers_count_get(struct team *team,
1315                                        struct team_gsetter_ctx *ctx)
1316 {
1317         ctx->data.u32_val = team->notify_peers.count;
1318         return 0;
1319 }
1320
1321 static int team_notify_peers_count_set(struct team *team,
1322                                        struct team_gsetter_ctx *ctx)
1323 {
1324         team->notify_peers.count = ctx->data.u32_val;
1325         return 0;
1326 }
1327
1328 static int team_notify_peers_interval_get(struct team *team,
1329                                           struct team_gsetter_ctx *ctx)
1330 {
1331         ctx->data.u32_val = team->notify_peers.interval;
1332         return 0;
1333 }
1334
1335 static int team_notify_peers_interval_set(struct team *team,
1336                                           struct team_gsetter_ctx *ctx)
1337 {
1338         team->notify_peers.interval = ctx->data.u32_val;
1339         return 0;
1340 }
1341
1342 static int team_mcast_rejoin_count_get(struct team *team,
1343                                        struct team_gsetter_ctx *ctx)
1344 {
1345         ctx->data.u32_val = team->mcast_rejoin.count;
1346         return 0;
1347 }
1348
1349 static int team_mcast_rejoin_count_set(struct team *team,
1350                                        struct team_gsetter_ctx *ctx)
1351 {
1352         team->mcast_rejoin.count = ctx->data.u32_val;
1353         return 0;
1354 }
1355
1356 static int team_mcast_rejoin_interval_get(struct team *team,
1357                                           struct team_gsetter_ctx *ctx)
1358 {
1359         ctx->data.u32_val = team->mcast_rejoin.interval;
1360         return 0;
1361 }
1362
1363 static int team_mcast_rejoin_interval_set(struct team *team,
1364                                           struct team_gsetter_ctx *ctx)
1365 {
1366         team->mcast_rejoin.interval = ctx->data.u32_val;
1367         return 0;
1368 }
1369
1370 static int team_port_en_option_get(struct team *team,
1371                                    struct team_gsetter_ctx *ctx)
1372 {
1373         struct team_port *port = ctx->info->port;
1374
1375         ctx->data.bool_val = team_port_enabled(port);
1376         return 0;
1377 }
1378
1379 static int team_port_en_option_set(struct team *team,
1380                                    struct team_gsetter_ctx *ctx)
1381 {
1382         struct team_port *port = ctx->info->port;
1383
1384         if (ctx->data.bool_val)
1385                 team_port_enable(team, port);
1386         else
1387                 team_port_disable(team, port);
1388         return 0;
1389 }
1390
1391 static int team_user_linkup_option_get(struct team *team,
1392                                        struct team_gsetter_ctx *ctx)
1393 {
1394         struct team_port *port = ctx->info->port;
1395
1396         ctx->data.bool_val = port->user.linkup;
1397         return 0;
1398 }
1399
1400 static void __team_carrier_check(struct team *team);
1401
1402 static int team_user_linkup_option_set(struct team *team,
1403                                        struct team_gsetter_ctx *ctx)
1404 {
1405         struct team_port *port = ctx->info->port;
1406
1407         port->user.linkup = ctx->data.bool_val;
1408         team_refresh_port_linkup(port);
1409         __team_carrier_check(port->team);
1410         return 0;
1411 }
1412
1413 static int team_user_linkup_en_option_get(struct team *team,
1414                                           struct team_gsetter_ctx *ctx)
1415 {
1416         struct team_port *port = ctx->info->port;
1417
1418         ctx->data.bool_val = port->user.linkup_enabled;
1419         return 0;
1420 }
1421
1422 static int team_user_linkup_en_option_set(struct team *team,
1423                                           struct team_gsetter_ctx *ctx)
1424 {
1425         struct team_port *port = ctx->info->port;
1426
1427         port->user.linkup_enabled = ctx->data.bool_val;
1428         team_refresh_port_linkup(port);
1429         __team_carrier_check(port->team);
1430         return 0;
1431 }
1432
1433 static int team_priority_option_get(struct team *team,
1434                                     struct team_gsetter_ctx *ctx)
1435 {
1436         struct team_port *port = ctx->info->port;
1437
1438         ctx->data.s32_val = port->priority;
1439         return 0;
1440 }
1441
1442 static int team_priority_option_set(struct team *team,
1443                                     struct team_gsetter_ctx *ctx)
1444 {
1445         struct team_port *port = ctx->info->port;
1446         s32 priority = ctx->data.s32_val;
1447
1448         if (port->priority == priority)
1449                 return 0;
1450         port->priority = priority;
1451         team_queue_override_port_prio_changed(team, port);
1452         return 0;
1453 }
1454
1455 static int team_queue_id_option_get(struct team *team,
1456                                     struct team_gsetter_ctx *ctx)
1457 {
1458         struct team_port *port = ctx->info->port;
1459
1460         ctx->data.u32_val = port->queue_id;
1461         return 0;
1462 }
1463
1464 static int team_queue_id_option_set(struct team *team,
1465                                     struct team_gsetter_ctx *ctx)
1466 {
1467         struct team_port *port = ctx->info->port;
1468         u16 new_queue_id = ctx->data.u32_val;
1469
1470         if (port->queue_id == new_queue_id)
1471                 return 0;
1472         if (new_queue_id >= team->dev->real_num_tx_queues)
1473                 return -EINVAL;
1474         team_queue_override_port_change_queue_id(team, port, new_queue_id);
1475         return 0;
1476 }
1477
1478 static const struct team_option team_options[] = {
1479         {
1480                 .name = "mode",
1481                 .type = TEAM_OPTION_TYPE_STRING,
1482                 .getter = team_mode_option_get,
1483                 .setter = team_mode_option_set,
1484         },
1485         {
1486                 .name = "notify_peers_count",
1487                 .type = TEAM_OPTION_TYPE_U32,
1488                 .getter = team_notify_peers_count_get,
1489                 .setter = team_notify_peers_count_set,
1490         },
1491         {
1492                 .name = "notify_peers_interval",
1493                 .type = TEAM_OPTION_TYPE_U32,
1494                 .getter = team_notify_peers_interval_get,
1495                 .setter = team_notify_peers_interval_set,
1496         },
1497         {
1498                 .name = "mcast_rejoin_count",
1499                 .type = TEAM_OPTION_TYPE_U32,
1500                 .getter = team_mcast_rejoin_count_get,
1501                 .setter = team_mcast_rejoin_count_set,
1502         },
1503         {
1504                 .name = "mcast_rejoin_interval",
1505                 .type = TEAM_OPTION_TYPE_U32,
1506                 .getter = team_mcast_rejoin_interval_get,
1507                 .setter = team_mcast_rejoin_interval_set,
1508         },
1509         {
1510                 .name = "enabled",
1511                 .type = TEAM_OPTION_TYPE_BOOL,
1512                 .per_port = true,
1513                 .getter = team_port_en_option_get,
1514                 .setter = team_port_en_option_set,
1515         },
1516         {
1517                 .name = "user_linkup",
1518                 .type = TEAM_OPTION_TYPE_BOOL,
1519                 .per_port = true,
1520                 .getter = team_user_linkup_option_get,
1521                 .setter = team_user_linkup_option_set,
1522         },
1523         {
1524                 .name = "user_linkup_enabled",
1525                 .type = TEAM_OPTION_TYPE_BOOL,
1526                 .per_port = true,
1527                 .getter = team_user_linkup_en_option_get,
1528                 .setter = team_user_linkup_en_option_set,
1529         },
1530         {
1531                 .name = "priority",
1532                 .type = TEAM_OPTION_TYPE_S32,
1533                 .per_port = true,
1534                 .getter = team_priority_option_get,
1535                 .setter = team_priority_option_set,
1536         },
1537         {
1538                 .name = "queue_id",
1539                 .type = TEAM_OPTION_TYPE_U32,
1540                 .per_port = true,
1541                 .getter = team_queue_id_option_get,
1542                 .setter = team_queue_id_option_set,
1543         },
1544 };
1545
1546 static struct lock_class_key team_netdev_xmit_lock_key;
1547 static struct lock_class_key team_netdev_addr_lock_key;
1548 static struct lock_class_key team_tx_busylock_key;
1549
1550 static void team_set_lockdep_class_one(struct net_device *dev,
1551                                        struct netdev_queue *txq,
1552                                        void *unused)
1553 {
1554         lockdep_set_class(&txq->_xmit_lock, &team_netdev_xmit_lock_key);
1555 }
1556
1557 static void team_set_lockdep_class(struct net_device *dev)
1558 {
1559         lockdep_set_class(&dev->addr_list_lock, &team_netdev_addr_lock_key);
1560         netdev_for_each_tx_queue(dev, team_set_lockdep_class_one, NULL);
1561         dev->qdisc_tx_busylock = &team_tx_busylock_key;
1562 }
1563
1564 static int team_init(struct net_device *dev)
1565 {
1566         struct team *team = netdev_priv(dev);
1567         int i;
1568         int err;
1569
1570         team->dev = dev;
1571         mutex_init(&team->lock);
1572         team_set_no_mode(team);
1573
1574         team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1575         if (!team->pcpu_stats)
1576                 return -ENOMEM;
1577
1578         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1579                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1580         INIT_LIST_HEAD(&team->port_list);
1581         err = team_queue_override_init(team);
1582         if (err)
1583                 goto err_team_queue_override_init;
1584
1585         team_adjust_ops(team);
1586
1587         INIT_LIST_HEAD(&team->option_list);
1588         INIT_LIST_HEAD(&team->option_inst_list);
1589
1590         team_notify_peers_init(team);
1591         team_mcast_rejoin_init(team);
1592
1593         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1594         if (err)
1595                 goto err_options_register;
1596         netif_carrier_off(dev);
1597
1598         team_set_lockdep_class(dev);
1599
1600         return 0;
1601
1602 err_options_register:
1603         team_mcast_rejoin_fini(team);
1604         team_notify_peers_fini(team);
1605         team_queue_override_fini(team);
1606 err_team_queue_override_init:
1607         free_percpu(team->pcpu_stats);
1608
1609         return err;
1610 }
1611
1612 static void team_uninit(struct net_device *dev)
1613 {
1614         struct team *team = netdev_priv(dev);
1615         struct team_port *port;
1616         struct team_port *tmp;
1617
1618         mutex_lock(&team->lock);
1619         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1620                 team_port_del(team, port->dev);
1621
1622         __team_change_mode(team, NULL); /* cleanup */
1623         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1624         team_mcast_rejoin_fini(team);
1625         team_notify_peers_fini(team);
1626         team_queue_override_fini(team);
1627         mutex_unlock(&team->lock);
1628 }
1629
1630 static void team_destructor(struct net_device *dev)
1631 {
1632         struct team *team = netdev_priv(dev);
1633
1634         free_percpu(team->pcpu_stats);
1635         free_netdev(dev);
1636 }
1637
1638 static int team_open(struct net_device *dev)
1639 {
1640         return 0;
1641 }
1642
1643 static int team_close(struct net_device *dev)
1644 {
1645         return 0;
1646 }
1647
1648 /*
1649  * note: already called with rcu_read_lock
1650  */
1651 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1652 {
1653         struct team *team = netdev_priv(dev);
1654         bool tx_success;
1655         unsigned int len = skb->len;
1656
1657         tx_success = team_queue_override_transmit(team, skb);
1658         if (!tx_success)
1659                 tx_success = team->ops.transmit(team, skb);
1660         if (tx_success) {
1661                 struct team_pcpu_stats *pcpu_stats;
1662
1663                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1664                 u64_stats_update_begin(&pcpu_stats->syncp);
1665                 pcpu_stats->tx_packets++;
1666                 pcpu_stats->tx_bytes += len;
1667                 u64_stats_update_end(&pcpu_stats->syncp);
1668         } else {
1669                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1670         }
1671
1672         return NETDEV_TX_OK;
1673 }
1674
1675 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1676                              void *accel_priv, select_queue_fallback_t fallback)
1677 {
1678         /*
1679          * This helper function exists to help dev_pick_tx get the correct
1680          * destination queue.  Using a helper function skips a call to
1681          * skb_tx_hash and will put the skbs in the queue we expect on their
1682          * way down to the team driver.
1683          */
1684         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1685
1686         /*
1687          * Save the original txq to restore before passing to the driver
1688          */
1689         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1690
1691         if (unlikely(txq >= dev->real_num_tx_queues)) {
1692                 do {
1693                         txq -= dev->real_num_tx_queues;
1694                 } while (txq >= dev->real_num_tx_queues);
1695         }
1696         return txq;
1697 }
1698
1699 static void team_change_rx_flags(struct net_device *dev, int change)
1700 {
1701         struct team *team = netdev_priv(dev);
1702         struct team_port *port;
1703         int inc;
1704
1705         rcu_read_lock();
1706         list_for_each_entry_rcu(port, &team->port_list, list) {
1707                 if (change & IFF_PROMISC) {
1708                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1709                         dev_set_promiscuity(port->dev, inc);
1710                 }
1711                 if (change & IFF_ALLMULTI) {
1712                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1713                         dev_set_allmulti(port->dev, inc);
1714                 }
1715         }
1716         rcu_read_unlock();
1717 }
1718
1719 static void team_set_rx_mode(struct net_device *dev)
1720 {
1721         struct team *team = netdev_priv(dev);
1722         struct team_port *port;
1723
1724         rcu_read_lock();
1725         list_for_each_entry_rcu(port, &team->port_list, list) {
1726                 dev_uc_sync_multiple(port->dev, dev);
1727                 dev_mc_sync_multiple(port->dev, dev);
1728         }
1729         rcu_read_unlock();
1730 }
1731
1732 static int team_set_mac_address(struct net_device *dev, void *p)
1733 {
1734         struct sockaddr *addr = p;
1735         struct team *team = netdev_priv(dev);
1736         struct team_port *port;
1737
1738         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1739                 return -EADDRNOTAVAIL;
1740         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1741         rcu_read_lock();
1742         list_for_each_entry_rcu(port, &team->port_list, list)
1743                 if (team->ops.port_change_dev_addr)
1744                         team->ops.port_change_dev_addr(team, port);
1745         rcu_read_unlock();
1746         return 0;
1747 }
1748
1749 static int team_change_mtu(struct net_device *dev, int new_mtu)
1750 {
1751         struct team *team = netdev_priv(dev);
1752         struct team_port *port;
1753         int err;
1754
1755         /*
1756          * Alhough this is reader, it's guarded by team lock. It's not possible
1757          * to traverse list in reverse under rcu_read_lock
1758          */
1759         mutex_lock(&team->lock);
1760         team->port_mtu_change_allowed = true;
1761         list_for_each_entry(port, &team->port_list, list) {
1762                 err = dev_set_mtu(port->dev, new_mtu);
1763                 if (err) {
1764                         netdev_err(dev, "Device %s failed to change mtu",
1765                                    port->dev->name);
1766                         goto unwind;
1767                 }
1768         }
1769         team->port_mtu_change_allowed = false;
1770         mutex_unlock(&team->lock);
1771
1772         dev->mtu = new_mtu;
1773
1774         return 0;
1775
1776 unwind:
1777         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1778                 dev_set_mtu(port->dev, dev->mtu);
1779         team->port_mtu_change_allowed = false;
1780         mutex_unlock(&team->lock);
1781
1782         return err;
1783 }
1784
1785 static struct rtnl_link_stats64 *
1786 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1787 {
1788         struct team *team = netdev_priv(dev);
1789         struct team_pcpu_stats *p;
1790         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1791         u32 rx_dropped = 0, tx_dropped = 0;
1792         unsigned int start;
1793         int i;
1794
1795         for_each_possible_cpu(i) {
1796                 p = per_cpu_ptr(team->pcpu_stats, i);
1797                 do {
1798                         start = u64_stats_fetch_begin_irq(&p->syncp);
1799                         rx_packets      = p->rx_packets;
1800                         rx_bytes        = p->rx_bytes;
1801                         rx_multicast    = p->rx_multicast;
1802                         tx_packets      = p->tx_packets;
1803                         tx_bytes        = p->tx_bytes;
1804                 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1805
1806                 stats->rx_packets       += rx_packets;
1807                 stats->rx_bytes         += rx_bytes;
1808                 stats->multicast        += rx_multicast;
1809                 stats->tx_packets       += tx_packets;
1810                 stats->tx_bytes         += tx_bytes;
1811                 /*
1812                  * rx_dropped & tx_dropped are u32, updated
1813                  * without syncp protection.
1814                  */
1815                 rx_dropped      += p->rx_dropped;
1816                 tx_dropped      += p->tx_dropped;
1817         }
1818         stats->rx_dropped       = rx_dropped;
1819         stats->tx_dropped       = tx_dropped;
1820         return stats;
1821 }
1822
1823 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1824 {
1825         struct team *team = netdev_priv(dev);
1826         struct team_port *port;
1827         int err;
1828
1829         /*
1830          * Alhough this is reader, it's guarded by team lock. It's not possible
1831          * to traverse list in reverse under rcu_read_lock
1832          */
1833         mutex_lock(&team->lock);
1834         list_for_each_entry(port, &team->port_list, list) {
1835                 err = vlan_vid_add(port->dev, proto, vid);
1836                 if (err)
1837                         goto unwind;
1838         }
1839         mutex_unlock(&team->lock);
1840
1841         return 0;
1842
1843 unwind:
1844         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1845                 vlan_vid_del(port->dev, proto, vid);
1846         mutex_unlock(&team->lock);
1847
1848         return err;
1849 }
1850
1851 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1852 {
1853         struct team *team = netdev_priv(dev);
1854         struct team_port *port;
1855
1856         rcu_read_lock();
1857         list_for_each_entry_rcu(port, &team->port_list, list)
1858                 vlan_vid_del(port->dev, proto, vid);
1859         rcu_read_unlock();
1860
1861         return 0;
1862 }
1863
1864 #ifdef CONFIG_NET_POLL_CONTROLLER
1865 static void team_poll_controller(struct net_device *dev)
1866 {
1867 }
1868
1869 static void __team_netpoll_cleanup(struct team *team)
1870 {
1871         struct team_port *port;
1872
1873         list_for_each_entry(port, &team->port_list, list)
1874                 team_port_disable_netpoll(port);
1875 }
1876
1877 static void team_netpoll_cleanup(struct net_device *dev)
1878 {
1879         struct team *team = netdev_priv(dev);
1880
1881         mutex_lock(&team->lock);
1882         __team_netpoll_cleanup(team);
1883         mutex_unlock(&team->lock);
1884 }
1885
1886 static int team_netpoll_setup(struct net_device *dev,
1887                               struct netpoll_info *npifo)
1888 {
1889         struct team *team = netdev_priv(dev);
1890         struct team_port *port;
1891         int err = 0;
1892
1893         mutex_lock(&team->lock);
1894         list_for_each_entry(port, &team->port_list, list) {
1895                 err = team_port_enable_netpoll(team, port);
1896                 if (err) {
1897                         __team_netpoll_cleanup(team);
1898                         break;
1899                 }
1900         }
1901         mutex_unlock(&team->lock);
1902         return err;
1903 }
1904 #endif
1905
1906 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1907 {
1908         struct team *team = netdev_priv(dev);
1909         int err;
1910
1911         mutex_lock(&team->lock);
1912         err = team_port_add(team, port_dev);
1913         mutex_unlock(&team->lock);
1914         return err;
1915 }
1916
1917 static int team_del_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_del(team, port_dev);
1924         mutex_unlock(&team->lock);
1925         return err;
1926 }
1927
1928 static netdev_features_t team_fix_features(struct net_device *dev,
1929                                            netdev_features_t features)
1930 {
1931         struct team_port *port;
1932         struct team *team = netdev_priv(dev);
1933         netdev_features_t mask;
1934
1935         mask = features;
1936         features &= ~NETIF_F_ONE_FOR_ALL;
1937         features |= NETIF_F_ALL_FOR_ALL;
1938
1939         rcu_read_lock();
1940         list_for_each_entry_rcu(port, &team->port_list, list) {
1941                 features = netdev_increment_features(features,
1942                                                      port->dev->features,
1943                                                      mask);
1944         }
1945         rcu_read_unlock();
1946         return features;
1947 }
1948
1949 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1950 {
1951         struct team *team = netdev_priv(dev);
1952
1953         team->user_carrier_enabled = true;
1954
1955         if (new_carrier)
1956                 netif_carrier_on(dev);
1957         else
1958                 netif_carrier_off(dev);
1959         return 0;
1960 }
1961
1962 static const struct net_device_ops team_netdev_ops = {
1963         .ndo_init               = team_init,
1964         .ndo_uninit             = team_uninit,
1965         .ndo_open               = team_open,
1966         .ndo_stop               = team_close,
1967         .ndo_start_xmit         = team_xmit,
1968         .ndo_select_queue       = team_select_queue,
1969         .ndo_change_rx_flags    = team_change_rx_flags,
1970         .ndo_set_rx_mode        = team_set_rx_mode,
1971         .ndo_set_mac_address    = team_set_mac_address,
1972         .ndo_change_mtu         = team_change_mtu,
1973         .ndo_get_stats64        = team_get_stats64,
1974         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
1975         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
1976 #ifdef CONFIG_NET_POLL_CONTROLLER
1977         .ndo_poll_controller    = team_poll_controller,
1978         .ndo_netpoll_setup      = team_netpoll_setup,
1979         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
1980 #endif
1981         .ndo_add_slave          = team_add_slave,
1982         .ndo_del_slave          = team_del_slave,
1983         .ndo_fix_features       = team_fix_features,
1984         .ndo_change_carrier     = team_change_carrier,
1985 };
1986
1987 /***********************
1988  * ethtool interface
1989  ***********************/
1990
1991 static void team_ethtool_get_drvinfo(struct net_device *dev,
1992                                      struct ethtool_drvinfo *drvinfo)
1993 {
1994         strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
1995         strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
1996 }
1997
1998 static const struct ethtool_ops team_ethtool_ops = {
1999         .get_drvinfo            = team_ethtool_get_drvinfo,
2000         .get_link               = ethtool_op_get_link,
2001 };
2002
2003 /***********************
2004  * rt netlink interface
2005  ***********************/
2006
2007 static void team_setup_by_port(struct net_device *dev,
2008                                struct net_device *port_dev)
2009 {
2010         dev->header_ops = port_dev->header_ops;
2011         dev->type = port_dev->type;
2012         dev->hard_header_len = port_dev->hard_header_len;
2013         dev->addr_len = port_dev->addr_len;
2014         dev->mtu = port_dev->mtu;
2015         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2016         eth_hw_addr_inherit(dev, port_dev);
2017 }
2018
2019 static int team_dev_type_check_change(struct net_device *dev,
2020                                       struct net_device *port_dev)
2021 {
2022         struct team *team = netdev_priv(dev);
2023         char *portname = port_dev->name;
2024         int err;
2025
2026         if (dev->type == port_dev->type)
2027                 return 0;
2028         if (!list_empty(&team->port_list)) {
2029                 netdev_err(dev, "Device %s is of different type\n", portname);
2030                 return -EBUSY;
2031         }
2032         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2033         err = notifier_to_errno(err);
2034         if (err) {
2035                 netdev_err(dev, "Refused to change device type\n");
2036                 return err;
2037         }
2038         dev_uc_flush(dev);
2039         dev_mc_flush(dev);
2040         team_setup_by_port(dev, port_dev);
2041         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2042         return 0;
2043 }
2044
2045 static void team_setup(struct net_device *dev)
2046 {
2047         ether_setup(dev);
2048
2049         dev->netdev_ops = &team_netdev_ops;
2050         dev->ethtool_ops = &team_ethtool_ops;
2051         dev->destructor = team_destructor;
2052         dev->tx_queue_len = 0;
2053         dev->flags |= IFF_MULTICAST;
2054         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2055
2056         /*
2057          * Indicate we support unicast address filtering. That way core won't
2058          * bring us to promisc mode in case a unicast addr is added.
2059          * Let this up to underlay drivers.
2060          */
2061         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2062
2063         dev->features |= NETIF_F_LLTX;
2064         dev->features |= NETIF_F_GRO;
2065
2066         /* Don't allow team devices to change network namespaces. */
2067         dev->features |= NETIF_F_NETNS_LOCAL;
2068
2069         dev->hw_features = TEAM_VLAN_FEATURES |
2070                            NETIF_F_HW_VLAN_CTAG_TX |
2071                            NETIF_F_HW_VLAN_CTAG_RX |
2072                            NETIF_F_HW_VLAN_CTAG_FILTER;
2073
2074         dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_HW_CSUM);
2075         dev->features |= dev->hw_features;
2076 }
2077
2078 static int team_newlink(struct net *src_net, struct net_device *dev,
2079                         struct nlattr *tb[], struct nlattr *data[])
2080 {
2081         if (tb[IFLA_ADDRESS] == NULL)
2082                 eth_hw_addr_random(dev);
2083
2084         return register_netdevice(dev);
2085 }
2086
2087 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
2088 {
2089         if (tb[IFLA_ADDRESS]) {
2090                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2091                         return -EINVAL;
2092                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2093                         return -EADDRNOTAVAIL;
2094         }
2095         return 0;
2096 }
2097
2098 static unsigned int team_get_num_tx_queues(void)
2099 {
2100         return TEAM_DEFAULT_NUM_TX_QUEUES;
2101 }
2102
2103 static unsigned int team_get_num_rx_queues(void)
2104 {
2105         return TEAM_DEFAULT_NUM_RX_QUEUES;
2106 }
2107
2108 static struct rtnl_link_ops team_link_ops __read_mostly = {
2109         .kind                   = DRV_NAME,
2110         .priv_size              = sizeof(struct team),
2111         .setup                  = team_setup,
2112         .newlink                = team_newlink,
2113         .validate               = team_validate,
2114         .get_num_tx_queues      = team_get_num_tx_queues,
2115         .get_num_rx_queues      = team_get_num_rx_queues,
2116 };
2117
2118
2119 /***********************************
2120  * Generic netlink custom interface
2121  ***********************************/
2122
2123 static struct genl_family team_nl_family = {
2124         .id             = GENL_ID_GENERATE,
2125         .name           = TEAM_GENL_NAME,
2126         .version        = TEAM_GENL_VERSION,
2127         .maxattr        = TEAM_ATTR_MAX,
2128         .netnsok        = true,
2129 };
2130
2131 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2132         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
2133         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
2134         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
2135         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
2136 };
2137
2138 static const struct nla_policy
2139 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2140         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
2141         [TEAM_ATTR_OPTION_NAME] = {
2142                 .type = NLA_STRING,
2143                 .len = TEAM_STRING_MAX_LEN,
2144         },
2145         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
2146         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
2147         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
2148 };
2149
2150 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2151 {
2152         struct sk_buff *msg;
2153         void *hdr;
2154         int err;
2155
2156         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2157         if (!msg)
2158                 return -ENOMEM;
2159
2160         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2161                           &team_nl_family, 0, TEAM_CMD_NOOP);
2162         if (!hdr) {
2163                 err = -EMSGSIZE;
2164                 goto err_msg_put;
2165         }
2166
2167         genlmsg_end(msg, hdr);
2168
2169         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2170
2171 err_msg_put:
2172         nlmsg_free(msg);
2173
2174         return err;
2175 }
2176
2177 /*
2178  * Netlink cmd functions should be locked by following two functions.
2179  * Since dev gets held here, that ensures dev won't disappear in between.
2180  */
2181 static struct team *team_nl_team_get(struct genl_info *info)
2182 {
2183         struct net *net = genl_info_net(info);
2184         int ifindex;
2185         struct net_device *dev;
2186         struct team *team;
2187
2188         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2189                 return NULL;
2190
2191         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2192         dev = dev_get_by_index(net, ifindex);
2193         if (!dev || dev->netdev_ops != &team_netdev_ops) {
2194                 if (dev)
2195                         dev_put(dev);
2196                 return NULL;
2197         }
2198
2199         team = netdev_priv(dev);
2200         mutex_lock(&team->lock);
2201         return team;
2202 }
2203
2204 static void team_nl_team_put(struct team *team)
2205 {
2206         mutex_unlock(&team->lock);
2207         dev_put(team->dev);
2208 }
2209
2210 typedef int team_nl_send_func_t(struct sk_buff *skb,
2211                                 struct team *team, u32 portid);
2212
2213 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2214 {
2215         return genlmsg_unicast(dev_net(team->dev), skb, portid);
2216 }
2217
2218 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2219                                        struct team_option_inst *opt_inst)
2220 {
2221         struct nlattr *option_item;
2222         struct team_option *option = opt_inst->option;
2223         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2224         struct team_gsetter_ctx ctx;
2225         int err;
2226
2227         ctx.info = opt_inst_info;
2228         err = team_option_get(team, opt_inst, &ctx);
2229         if (err)
2230                 return err;
2231
2232         option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2233         if (!option_item)
2234                 return -EMSGSIZE;
2235
2236         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2237                 goto nest_cancel;
2238         if (opt_inst_info->port &&
2239             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2240                         opt_inst_info->port->dev->ifindex))
2241                 goto nest_cancel;
2242         if (opt_inst->option->array_size &&
2243             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2244                         opt_inst_info->array_index))
2245                 goto nest_cancel;
2246
2247         switch (option->type) {
2248         case TEAM_OPTION_TYPE_U32:
2249                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2250                         goto nest_cancel;
2251                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2252                         goto nest_cancel;
2253                 break;
2254         case TEAM_OPTION_TYPE_STRING:
2255                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2256                         goto nest_cancel;
2257                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2258                                    ctx.data.str_val))
2259                         goto nest_cancel;
2260                 break;
2261         case TEAM_OPTION_TYPE_BINARY:
2262                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2263                         goto nest_cancel;
2264                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2265                             ctx.data.bin_val.ptr))
2266                         goto nest_cancel;
2267                 break;
2268         case TEAM_OPTION_TYPE_BOOL:
2269                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2270                         goto nest_cancel;
2271                 if (ctx.data.bool_val &&
2272                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2273                         goto nest_cancel;
2274                 break;
2275         case TEAM_OPTION_TYPE_S32:
2276                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2277                         goto nest_cancel;
2278                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2279                         goto nest_cancel;
2280                 break;
2281         default:
2282                 BUG();
2283         }
2284         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2285                 goto nest_cancel;
2286         if (opt_inst->changed) {
2287                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2288                         goto nest_cancel;
2289                 opt_inst->changed = false;
2290         }
2291         nla_nest_end(skb, option_item);
2292         return 0;
2293
2294 nest_cancel:
2295         nla_nest_cancel(skb, option_item);
2296         return -EMSGSIZE;
2297 }
2298
2299 static int __send_and_alloc_skb(struct sk_buff **pskb,
2300                                 struct team *team, u32 portid,
2301                                 team_nl_send_func_t *send_func)
2302 {
2303         int err;
2304
2305         if (*pskb) {
2306                 err = send_func(*pskb, team, portid);
2307                 if (err)
2308                         return err;
2309         }
2310         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2311         if (!*pskb)
2312                 return -ENOMEM;
2313         return 0;
2314 }
2315
2316 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2317                                     int flags, team_nl_send_func_t *send_func,
2318                                     struct list_head *sel_opt_inst_list)
2319 {
2320         struct nlattr *option_list;
2321         struct nlmsghdr *nlh;
2322         void *hdr;
2323         struct team_option_inst *opt_inst;
2324         int err;
2325         struct sk_buff *skb = NULL;
2326         bool incomplete;
2327         int i;
2328
2329         opt_inst = list_first_entry(sel_opt_inst_list,
2330                                     struct team_option_inst, tmp_list);
2331
2332 start_again:
2333         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2334         if (err)
2335                 return err;
2336
2337         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2338                           TEAM_CMD_OPTIONS_GET);
2339         if (!hdr)
2340                 return -EMSGSIZE;
2341
2342         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2343                 goto nla_put_failure;
2344         option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2345         if (!option_list)
2346                 goto nla_put_failure;
2347
2348         i = 0;
2349         incomplete = false;
2350         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2351                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2352                 if (err) {
2353                         if (err == -EMSGSIZE) {
2354                                 if (!i)
2355                                         goto errout;
2356                                 incomplete = true;
2357                                 break;
2358                         }
2359                         goto errout;
2360                 }
2361                 i++;
2362         }
2363
2364         nla_nest_end(skb, option_list);
2365         genlmsg_end(skb, hdr);
2366         if (incomplete)
2367                 goto start_again;
2368
2369 send_done:
2370         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2371         if (!nlh) {
2372                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2373                 if (err)
2374                         goto errout;
2375                 goto send_done;
2376         }
2377
2378         return send_func(skb, team, portid);
2379
2380 nla_put_failure:
2381         err = -EMSGSIZE;
2382 errout:
2383         genlmsg_cancel(skb, hdr);
2384         nlmsg_free(skb);
2385         return err;
2386 }
2387
2388 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2389 {
2390         struct team *team;
2391         struct team_option_inst *opt_inst;
2392         int err;
2393         LIST_HEAD(sel_opt_inst_list);
2394
2395         team = team_nl_team_get(info);
2396         if (!team)
2397                 return -EINVAL;
2398
2399         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2400                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2401         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2402                                        NLM_F_ACK, team_nl_send_unicast,
2403                                        &sel_opt_inst_list);
2404
2405         team_nl_team_put(team);
2406
2407         return err;
2408 }
2409
2410 static int team_nl_send_event_options_get(struct team *team,
2411                                           struct list_head *sel_opt_inst_list);
2412
2413 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2414 {
2415         struct team *team;
2416         int err = 0;
2417         int i;
2418         struct nlattr *nl_option;
2419         LIST_HEAD(opt_inst_list);
2420
2421         team = team_nl_team_get(info);
2422         if (!team)
2423                 return -EINVAL;
2424
2425         err = -EINVAL;
2426         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2427                 err = -EINVAL;
2428                 goto team_put;
2429         }
2430
2431         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2432                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2433                 struct nlattr *attr;
2434                 struct nlattr *attr_data;
2435                 enum team_option_type opt_type;
2436                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2437                 u32 opt_array_index = 0;
2438                 bool opt_is_array = false;
2439                 struct team_option_inst *opt_inst;
2440                 char *opt_name;
2441                 bool opt_found = false;
2442
2443                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2444                         err = -EINVAL;
2445                         goto team_put;
2446                 }
2447                 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2448                                        nl_option, team_nl_option_policy);
2449                 if (err)
2450                         goto team_put;
2451                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2452                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2453                         err = -EINVAL;
2454                         goto team_put;
2455                 }
2456                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2457                 case NLA_U32:
2458                         opt_type = TEAM_OPTION_TYPE_U32;
2459                         break;
2460                 case NLA_STRING:
2461                         opt_type = TEAM_OPTION_TYPE_STRING;
2462                         break;
2463                 case NLA_BINARY:
2464                         opt_type = TEAM_OPTION_TYPE_BINARY;
2465                         break;
2466                 case NLA_FLAG:
2467                         opt_type = TEAM_OPTION_TYPE_BOOL;
2468                         break;
2469                 case NLA_S32:
2470                         opt_type = TEAM_OPTION_TYPE_S32;
2471                         break;
2472                 default:
2473                         goto team_put;
2474                 }
2475
2476                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2477                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2478                         err = -EINVAL;
2479                         goto team_put;
2480                 }
2481
2482                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2483                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2484                 if (attr)
2485                         opt_port_ifindex = nla_get_u32(attr);
2486
2487                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2488                 if (attr) {
2489                         opt_is_array = true;
2490                         opt_array_index = nla_get_u32(attr);
2491                 }
2492
2493                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2494                         struct team_option *option = opt_inst->option;
2495                         struct team_gsetter_ctx ctx;
2496                         struct team_option_inst_info *opt_inst_info;
2497                         int tmp_ifindex;
2498
2499                         opt_inst_info = &opt_inst->info;
2500                         tmp_ifindex = opt_inst_info->port ?
2501                                       opt_inst_info->port->dev->ifindex : 0;
2502                         if (option->type != opt_type ||
2503                             strcmp(option->name, opt_name) ||
2504                             tmp_ifindex != opt_port_ifindex ||
2505                             (option->array_size && !opt_is_array) ||
2506                             opt_inst_info->array_index != opt_array_index)
2507                                 continue;
2508                         opt_found = true;
2509                         ctx.info = opt_inst_info;
2510                         switch (opt_type) {
2511                         case TEAM_OPTION_TYPE_U32:
2512                                 ctx.data.u32_val = nla_get_u32(attr_data);
2513                                 break;
2514                         case TEAM_OPTION_TYPE_STRING:
2515                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2516                                         err = -EINVAL;
2517                                         goto team_put;
2518                                 }
2519                                 ctx.data.str_val = nla_data(attr_data);
2520                                 break;
2521                         case TEAM_OPTION_TYPE_BINARY:
2522                                 ctx.data.bin_val.len = nla_len(attr_data);
2523                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2524                                 break;
2525                         case TEAM_OPTION_TYPE_BOOL:
2526                                 ctx.data.bool_val = attr_data ? true : false;
2527                                 break;
2528                         case TEAM_OPTION_TYPE_S32:
2529                                 ctx.data.s32_val = nla_get_s32(attr_data);
2530                                 break;
2531                         default:
2532                                 BUG();
2533                         }
2534                         err = team_option_set(team, opt_inst, &ctx);
2535                         if (err)
2536                                 goto team_put;
2537                         opt_inst->changed = true;
2538                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2539                 }
2540                 if (!opt_found) {
2541                         err = -ENOENT;
2542                         goto team_put;
2543                 }
2544         }
2545
2546         err = team_nl_send_event_options_get(team, &opt_inst_list);
2547
2548 team_put:
2549         team_nl_team_put(team);
2550
2551         return err;
2552 }
2553
2554 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2555                                      struct team_port *port)
2556 {
2557         struct nlattr *port_item;
2558
2559         port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2560         if (!port_item)
2561                 goto nest_cancel;
2562         if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2563                 goto nest_cancel;
2564         if (port->changed) {
2565                 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2566                         goto nest_cancel;
2567                 port->changed = false;
2568         }
2569         if ((port->removed &&
2570              nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2571             (port->state.linkup &&
2572              nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2573             nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2574             nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2575                 goto nest_cancel;
2576         nla_nest_end(skb, port_item);
2577         return 0;
2578
2579 nest_cancel:
2580         nla_nest_cancel(skb, port_item);
2581         return -EMSGSIZE;
2582 }
2583
2584 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2585                                       int flags, team_nl_send_func_t *send_func,
2586                                       struct team_port *one_port)
2587 {
2588         struct nlattr *port_list;
2589         struct nlmsghdr *nlh;
2590         void *hdr;
2591         struct team_port *port;
2592         int err;
2593         struct sk_buff *skb = NULL;
2594         bool incomplete;
2595         int i;
2596
2597         port = list_first_entry_or_null(&team->port_list,
2598                                         struct team_port, list);
2599
2600 start_again:
2601         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2602         if (err)
2603                 return err;
2604
2605         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2606                           TEAM_CMD_PORT_LIST_GET);
2607         if (!hdr)
2608                 return -EMSGSIZE;
2609
2610         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2611                 goto nla_put_failure;
2612         port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2613         if (!port_list)
2614                 goto nla_put_failure;
2615
2616         i = 0;
2617         incomplete = false;
2618
2619         /* If one port is selected, called wants to send port list containing
2620          * only this port. Otherwise go through all listed ports and send all
2621          */
2622         if (one_port) {
2623                 err = team_nl_fill_one_port_get(skb, one_port);
2624                 if (err)
2625                         goto errout;
2626         } else if (port) {
2627                 list_for_each_entry_from(port, &team->port_list, list) {
2628                         err = team_nl_fill_one_port_get(skb, port);
2629                         if (err) {
2630                                 if (err == -EMSGSIZE) {
2631                                         if (!i)
2632                                                 goto errout;
2633                                         incomplete = true;
2634                                         break;
2635                                 }
2636                                 goto errout;
2637                         }
2638                         i++;
2639                 }
2640         }
2641
2642         nla_nest_end(skb, port_list);
2643         genlmsg_end(skb, hdr);
2644         if (incomplete)
2645                 goto start_again;
2646
2647 send_done:
2648         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2649         if (!nlh) {
2650                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2651                 if (err)
2652                         goto errout;
2653                 goto send_done;
2654         }
2655
2656         return send_func(skb, team, portid);
2657
2658 nla_put_failure:
2659         err = -EMSGSIZE;
2660 errout:
2661         genlmsg_cancel(skb, hdr);
2662         nlmsg_free(skb);
2663         return err;
2664 }
2665
2666 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2667                                      struct genl_info *info)
2668 {
2669         struct team *team;
2670         int err;
2671
2672         team = team_nl_team_get(info);
2673         if (!team)
2674                 return -EINVAL;
2675
2676         err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2677                                          NLM_F_ACK, team_nl_send_unicast, NULL);
2678
2679         team_nl_team_put(team);
2680
2681         return err;
2682 }
2683
2684 static const struct genl_ops team_nl_ops[] = {
2685         {
2686                 .cmd = TEAM_CMD_NOOP,
2687                 .doit = team_nl_cmd_noop,
2688                 .policy = team_nl_policy,
2689         },
2690         {
2691                 .cmd = TEAM_CMD_OPTIONS_SET,
2692                 .doit = team_nl_cmd_options_set,
2693                 .policy = team_nl_policy,
2694                 .flags = GENL_ADMIN_PERM,
2695         },
2696         {
2697                 .cmd = TEAM_CMD_OPTIONS_GET,
2698                 .doit = team_nl_cmd_options_get,
2699                 .policy = team_nl_policy,
2700                 .flags = GENL_ADMIN_PERM,
2701         },
2702         {
2703                 .cmd = TEAM_CMD_PORT_LIST_GET,
2704                 .doit = team_nl_cmd_port_list_get,
2705                 .policy = team_nl_policy,
2706                 .flags = GENL_ADMIN_PERM,
2707         },
2708 };
2709
2710 static const struct genl_multicast_group team_nl_mcgrps[] = {
2711         { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2712 };
2713
2714 static int team_nl_send_multicast(struct sk_buff *skb,
2715                                   struct team *team, u32 portid)
2716 {
2717         return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2718                                        skb, 0, 0, GFP_KERNEL);
2719 }
2720
2721 static int team_nl_send_event_options_get(struct team *team,
2722                                           struct list_head *sel_opt_inst_list)
2723 {
2724         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2725                                         sel_opt_inst_list);
2726 }
2727
2728 static int team_nl_send_event_port_get(struct team *team,
2729                                        struct team_port *port)
2730 {
2731         return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2732                                           port);
2733 }
2734
2735 static int team_nl_init(void)
2736 {
2737         return genl_register_family_with_ops_groups(&team_nl_family, team_nl_ops,
2738                                                     team_nl_mcgrps);
2739 }
2740
2741 static void team_nl_fini(void)
2742 {
2743         genl_unregister_family(&team_nl_family);
2744 }
2745
2746
2747 /******************
2748  * Change checkers
2749  ******************/
2750
2751 static void __team_options_change_check(struct team *team)
2752 {
2753         int err;
2754         struct team_option_inst *opt_inst;
2755         LIST_HEAD(sel_opt_inst_list);
2756
2757         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2758                 if (opt_inst->changed)
2759                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2760         }
2761         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2762         if (err && err != -ESRCH)
2763                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2764                             err);
2765 }
2766
2767 /* rtnl lock is held */
2768
2769 static void __team_port_change_send(struct team_port *port, bool linkup)
2770 {
2771         int err;
2772
2773         port->changed = true;
2774         port->state.linkup = linkup;
2775         team_refresh_port_linkup(port);
2776         if (linkup) {
2777                 struct ethtool_cmd ecmd;
2778
2779                 err = __ethtool_get_settings(port->dev, &ecmd);
2780                 if (!err) {
2781                         port->state.speed = ethtool_cmd_speed(&ecmd);
2782                         port->state.duplex = ecmd.duplex;
2783                         goto send_event;
2784                 }
2785         }
2786         port->state.speed = 0;
2787         port->state.duplex = 0;
2788
2789 send_event:
2790         err = team_nl_send_event_port_get(port->team, port);
2791         if (err && err != -ESRCH)
2792                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2793                             port->dev->name, err);
2794
2795 }
2796
2797 static void __team_carrier_check(struct team *team)
2798 {
2799         struct team_port *port;
2800         bool team_linkup;
2801
2802         if (team->user_carrier_enabled)
2803                 return;
2804
2805         team_linkup = false;
2806         list_for_each_entry(port, &team->port_list, list) {
2807                 if (port->linkup) {
2808                         team_linkup = true;
2809                         break;
2810                 }
2811         }
2812
2813         if (team_linkup)
2814                 netif_carrier_on(team->dev);
2815         else
2816                 netif_carrier_off(team->dev);
2817 }
2818
2819 static void __team_port_change_check(struct team_port *port, bool linkup)
2820 {
2821         if (port->state.linkup != linkup)
2822                 __team_port_change_send(port, linkup);
2823         __team_carrier_check(port->team);
2824 }
2825
2826 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2827 {
2828         __team_port_change_send(port, linkup);
2829         __team_carrier_check(port->team);
2830 }
2831
2832 static void __team_port_change_port_removed(struct team_port *port)
2833 {
2834         port->removed = true;
2835         __team_port_change_send(port, false);
2836         __team_carrier_check(port->team);
2837 }
2838
2839 static void team_port_change_check(struct team_port *port, bool linkup)
2840 {
2841         struct team *team = port->team;
2842
2843         mutex_lock(&team->lock);
2844         __team_port_change_check(port, linkup);
2845         mutex_unlock(&team->lock);
2846 }
2847
2848
2849 /************************************
2850  * Net device notifier event handler
2851  ************************************/
2852
2853 static int team_device_event(struct notifier_block *unused,
2854                              unsigned long event, void *ptr)
2855 {
2856         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2857         struct team_port *port;
2858
2859         port = team_port_get_rtnl(dev);
2860         if (!port)
2861                 return NOTIFY_DONE;
2862
2863         switch (event) {
2864         case NETDEV_UP:
2865                 if (netif_carrier_ok(dev))
2866                         team_port_change_check(port, true);
2867                 break;
2868         case NETDEV_DOWN:
2869                 team_port_change_check(port, false);
2870                 break;
2871         case NETDEV_CHANGE:
2872                 if (netif_running(port->dev))
2873                         team_port_change_check(port,
2874                                                !!netif_carrier_ok(port->dev));
2875                 break;
2876         case NETDEV_UNREGISTER:
2877                 team_del_slave(port->team->dev, dev);
2878                 break;
2879         case NETDEV_FEAT_CHANGE:
2880                 team_compute_features(port->team);
2881                 break;
2882         case NETDEV_PRECHANGEMTU:
2883                 /* Forbid to change mtu of underlaying device */
2884                 if (!port->team->port_mtu_change_allowed)
2885                         return NOTIFY_BAD;
2886                 break;
2887         case NETDEV_PRE_TYPE_CHANGE:
2888                 /* Forbid to change type of underlaying device */
2889                 return NOTIFY_BAD;
2890         case NETDEV_RESEND_IGMP:
2891                 /* Propagate to master device */
2892                 call_netdevice_notifiers(event, port->team->dev);
2893                 break;
2894         }
2895         return NOTIFY_DONE;
2896 }
2897
2898 static struct notifier_block team_notifier_block __read_mostly = {
2899         .notifier_call = team_device_event,
2900 };
2901
2902
2903 /***********************
2904  * Module init and exit
2905  ***********************/
2906
2907 static int __init team_module_init(void)
2908 {
2909         int err;
2910
2911         register_netdevice_notifier(&team_notifier_block);
2912
2913         err = rtnl_link_register(&team_link_ops);
2914         if (err)
2915                 goto err_rtnl_reg;
2916
2917         err = team_nl_init();
2918         if (err)
2919                 goto err_nl_init;
2920
2921         return 0;
2922
2923 err_nl_init:
2924         rtnl_link_unregister(&team_link_ops);
2925
2926 err_rtnl_reg:
2927         unregister_netdevice_notifier(&team_notifier_block);
2928
2929         return err;
2930 }
2931
2932 static void __exit team_module_exit(void)
2933 {
2934         team_nl_fini();
2935         rtnl_link_unregister(&team_link_ops);
2936         unregister_netdevice_notifier(&team_notifier_block);
2937 }
2938
2939 module_init(team_module_init);
2940 module_exit(team_module_exit);
2941
2942 MODULE_LICENSE("GPL v2");
2943 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2944 MODULE_DESCRIPTION("Ethernet team device driver");
2945 MODULE_ALIAS_RTNL_LINK(DRV_NAME);