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
 633         team = container_of(work, struct team, notify_peers.dw.work);
 634
 635         if (!rtnl_trylock()) {
 636                 schedule_delayed_work(&team->notify_peers.dw, 0);
 637                 return;
 638         }
 639         call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
 640         rtnl_unlock();
 641         if (!atomic_dec_and_test(&team->notify_peers.count_pending))
 642                 schedule_delayed_work(&team->notify_peers.dw,
 643                                       msecs_to_jiffies(team->notify_peers.interval));
 644 }
 645
 646 static void team_notify_peers(struct team *team)
 647 {
 648         if (!team->notify_peers.count || !netif_running(team->dev))
 649                 return;
 650         atomic_set(&team->notify_peers.count_pending, team->notify_peers.count);
 651         schedule_delayed_work(&team->notify_peers.dw, 0);
 652 }
 653
 654 static void team_notify_peers_init(struct team *team)
 655 {
 656         INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
 657 }
 658
 659 static void team_notify_peers_fini(struct team *team)
 660 {
 661         cancel_delayed_work_sync(&team->notify_peers.dw);
 662 }
 663
 664
 665 /*******************************
 666  * Send multicast group rejoins
 667  *******************************/
 668
 669 static void team_mcast_rejoin_work(struct work_struct *work)
 670 {
 671         struct team *team;
 672
 673         team = container_of(work, struct team, mcast_rejoin.dw.work);
 674
 675         if (!rtnl_trylock()) {
 676                 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 677                 return;
 678         }
 679         call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
 680         rtnl_unlock();
 681         if (!atomic_dec_and_test(&team->mcast_rejoin.count_pending))
 682                 schedule_delayed_work(&team->mcast_rejoin.dw,
 683                                       msecs_to_jiffies(team->mcast_rejoin.interval));
 684 }
 685
 686 static void team_mcast_rejoin(struct team *team)
 687 {
 688         if (!team->mcast_rejoin.count || !netif_running(team->dev))
 689                 return;
 690         atomic_set(&team->mcast_rejoin.count_pending, team->mcast_rejoin.count);
 691         schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 692 }
 693
 694 static void team_mcast_rejoin_init(struct team *team)
 695 {
 696         INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
 697 }
 698
 699 static void team_mcast_rejoin_fini(struct team *team)
 700 {
 701         cancel_delayed_work_sync(&team->mcast_rejoin.dw);
 702 }
 703
 704
 705 /************************
 706  * Rx path frame handler
 707  ************************/
 708
 709 /* note: already called with rcu_read_lock */
 710 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
 711 {
 712         struct sk_buff *skb = *pskb;
 713         struct team_port *port;
 714         struct team *team;
 715         rx_handler_result_t res;
 716
 717         skb = skb_share_check(skb, GFP_ATOMIC);
 718         if (!skb)
 719                 return RX_HANDLER_CONSUMED;
 720
 721         *pskb = skb;
 722
 723         port = team_port_get_rcu(skb->dev);
 724         team = port->team;
 725         if (!team_port_enabled(port)) {
 726                 /* allow exact match delivery for disabled ports */
 727                 res = RX_HANDLER_EXACT;
 728         } else {
 729                 res = team->ops.receive(team, port, skb);
 730         }
 731         if (res == RX_HANDLER_ANOTHER) {
 732                 struct team_pcpu_stats *pcpu_stats;
 733
 734                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
 735                 u64_stats_update_begin(&pcpu_stats->syncp);
 736                 pcpu_stats->rx_packets++;
 737                 pcpu_stats->rx_bytes += skb->len;
 738                 if (skb->pkt_type == PACKET_MULTICAST)
 739                         pcpu_stats->rx_multicast++;
 740                 u64_stats_update_end(&pcpu_stats->syncp);
 741
 742                 skb->dev = team->dev;
 743         } else {
 744                 this_cpu_inc(team->pcpu_stats->rx_dropped);
 745         }
 746
 747         return res;
 748 }
 749
 750
 751 /*************************************
 752  * Multiqueue Tx port select override
 753  *************************************/
 754
 755 static int team_queue_override_init(struct team *team)
 756 {
 757         struct list_head *listarr;
 758         unsigned int queue_cnt = team->dev->num_tx_queues - 1;
 759         unsigned int i;
 760
 761         if (!queue_cnt)
 762                 return 0;
 763         listarr = kmalloc(sizeof(struct list_head) * queue_cnt, GFP_KERNEL);
 764         if (!listarr)
 765                 return -ENOMEM;
 766         team->qom_lists = listarr;
 767         for (i = 0; i < queue_cnt; i++)
 768                 INIT_LIST_HEAD(listarr++);
 769         return 0;
 770 }
 771
 772 static void team_queue_override_fini(struct team *team)
 773 {
 774         kfree(team->qom_lists);
 775 }
 776
 777 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
 778 {
 779         return &team->qom_lists[queue_id - 1];
 780 }
 781
 782 /*
 783  * note: already called with rcu_read_lock
 784  */
 785 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
 786 {
 787         struct list_head *qom_list;
 788         struct team_port *port;
 789
 790         if (!team->queue_override_enabled || !skb->queue_mapping)
 791                 return false;
 792         qom_list = __team_get_qom_list(team, skb->queue_mapping);
 793         list_for_each_entry_rcu(port, qom_list, qom_list) {
 794                 if (!team_dev_queue_xmit(team, port, skb))
 795                         return true;
 796         }
 797         return false;
 798 }
 799
 800 static void __team_queue_override_port_del(struct team *team,
 801                                            struct team_port *port)
 802 {
 803         if (!port->queue_id)
 804                 return;
 805         list_del_rcu(&port->qom_list);
 806 }
 807
 808 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
 809                                                       struct team_port *cur)
 810 {
 811         if (port->priority < cur->priority)
 812                 return true;
 813         if (port->priority > cur->priority)
 814                 return false;
 815         if (port->index < cur->index)
 816                 return true;
 817         return false;
 818 }
 819
 820 static void __team_queue_override_port_add(struct team *team,
 821                                            struct team_port *port)
 822 {
 823         struct team_port *cur;
 824         struct list_head *qom_list;
 825         struct list_head *node;
 826
 827         if (!port->queue_id)
 828                 return;
 829         qom_list = __team_get_qom_list(team, port->queue_id);
 830         node = qom_list;
 831         list_for_each_entry(cur, qom_list, qom_list) {
 832                 if (team_queue_override_port_has_gt_prio_than(port, cur))
 833                         break;
 834                 node = &cur->qom_list;
 835         }
 836         list_add_tail_rcu(&port->qom_list, node);
 837 }
 838
 839 static void __team_queue_override_enabled_check(struct team *team)
 840 {
 841         struct team_port *port;
 842         bool enabled = false;
 843
 844         list_for_each_entry(port, &team->port_list, list) {
 845                 if (port->queue_id) {
 846                         enabled = true;
 847                         break;
 848                 }
 849         }
 850         if (enabled == team->queue_override_enabled)
 851                 return;
 852         netdev_dbg(team->dev, "%s queue override\n",
 853                    enabled ? "Enabling" : "Disabling");
 854         team->queue_override_enabled = enabled;
 855 }
 856
 857 static void team_queue_override_port_prio_changed(struct team *team,
 858                                                   struct team_port *port)
 859 {
 860         if (!port->queue_id || team_port_enabled(port))
 861                 return;
 862         __team_queue_override_port_del(team, port);
 863         __team_queue_override_port_add(team, port);
 864         __team_queue_override_enabled_check(team);
 865 }
 866
 867 static void team_queue_override_port_change_queue_id(struct team *team,
 868                                                      struct team_port *port,
 869                                                      u16 new_queue_id)
 870 {
 871         if (team_port_enabled(port)) {
 872                 __team_queue_override_port_del(team, port);
 873                 port->queue_id = new_queue_id;
 874                 __team_queue_override_port_add(team, port);
 875                 __team_queue_override_enabled_check(team);
 876         } else {
 877                 port->queue_id = new_queue_id;
 878         }
 879 }
 880
 881 static void team_queue_override_port_add(struct team *team,
 882                                          struct team_port *port)
 883 {
 884         __team_queue_override_port_add(team, port);
 885         __team_queue_override_enabled_check(team);
 886 }
 887
 888 static void team_queue_override_port_del(struct team *team,
 889                                          struct team_port *port)
 890 {
 891         __team_queue_override_port_del(team, port);
 892         __team_queue_override_enabled_check(team);
 893 }
 894
 895
 896 /****************
 897  * Port handling
 898  ****************/
 899
 900 static bool team_port_find(const struct team *team,
 901                            const struct team_port *port)
 902 {
 903         struct team_port *cur;
 904
 905         list_for_each_entry(cur, &team->port_list, list)
 906                 if (cur == port)
 907                         return true;
 908         return false;
 909 }
 910
 911 /*
 912  * Enable/disable port by adding to enabled port hashlist and setting
 913  * port->index (Might be racy so reader could see incorrect ifindex when
 914  * processing a flying packet, but that is not a problem). Write guarded
 915  * by team->lock.
 916  */
 917 static void team_port_enable(struct team *team,
 918                              struct team_port *port)
 919 {
 920         if (team_port_enabled(port))
 921                 return;
 922         port->index = team->en_port_count++;
 923         hlist_add_head_rcu(&port->hlist,
 924                            team_port_index_hash(team, port->index));
 925         team_adjust_ops(team);
 926         team_queue_override_port_add(team, port);
 927         if (team->ops.port_enabled)
 928                 team->ops.port_enabled(team, port);
 929         team_notify_peers(team);
 930         team_mcast_rejoin(team);
 931 }
 932
 933 static void __reconstruct_port_hlist(struct team *team, int rm_index)
 934 {
 935         int i;
 936         struct team_port *port;
 937
 938         for (i = rm_index + 1; i < team->en_port_count; i++) {
 939                 port = team_get_port_by_index(team, i);
 940                 hlist_del_rcu(&port->hlist);
 941                 port->index--;
 942                 hlist_add_head_rcu(&port->hlist,
 943                                    team_port_index_hash(team, port->index));
 944         }
 945 }
 946
 947 static void team_port_disable(struct team *team,
 948                               struct team_port *port)
 949 {
 950         if (!team_port_enabled(port))
 951                 return;
 952         if (team->ops.port_disabled)
 953                 team->ops.port_disabled(team, port);
 954         hlist_del_rcu(&port->hlist);
 955         __reconstruct_port_hlist(team, port->index);
 956         port->index = -1;
 957         team->en_port_count--;
 958         team_queue_override_port_del(team, port);
 959         team_adjust_ops(team);
 960         team_notify_peers(team);
 961         team_mcast_rejoin(team);
 962 }
 963
 964 #define TEAM_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
 965                             NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
 966                             NETIF_F_HIGHDMA | NETIF_F_LRO)
 967
 968 static void __team_compute_features(struct team *team)
 969 {
 970         struct team_port *port;
 971         u32 vlan_features = TEAM_VLAN_FEATURES;
 972         unsigned short max_hard_header_len = ETH_HLEN;
 973         unsigned int flags, dst_release_flag = IFF_XMIT_DST_RELEASE;
 974
 975         list_for_each_entry(port, &team->port_list, list) {
 976                 vlan_features = netdev_increment_features(vlan_features,
 977                                         port->dev->vlan_features,
 978                                         TEAM_VLAN_FEATURES);
 979
 980                 dst_release_flag &= port->dev->priv_flags;
 981                 if (port->dev->hard_header_len > max_hard_header_len)
 982                         max_hard_header_len = port->dev->hard_header_len;
 983         }
 984
 985         team->dev->vlan_features = vlan_features;
 986         team->dev->hard_header_len = max_hard_header_len;
 987
 988         flags = team->dev->priv_flags & ~IFF_XMIT_DST_RELEASE;
 989         team->dev->priv_flags = flags | dst_release_flag;
 990
 991         netdev_change_features(team->dev);
 992 }
 993
 994 static void team_compute_features(struct team *team)
 995 {
 996         mutex_lock(&team->lock);
 997         __team_compute_features(team);
 998         mutex_unlock(&team->lock);
 999 }
1000
1001 static int team_port_enter(struct team *team, struct team_port *port)
1002 {
1003         int err = 0;
1004
1005         dev_hold(team->dev);
1006         port->dev->priv_flags |= IFF_TEAM_PORT;
1007         if (team->ops.port_enter) {
1008                 err = team->ops.port_enter(team, port);
1009                 if (err) {
1010                         netdev_err(team->dev, "Device %s failed to enter team mode\n",
1011                                    port->dev->name);
1012                         goto err_port_enter;
1013                 }
1014         }
1015
1016         return 0;
1017
1018 err_port_enter:
1019         port->dev->priv_flags &= ~IFF_TEAM_PORT;
1020         dev_put(team->dev);
1021
1022         return err;
1023 }
1024
1025 static void team_port_leave(struct team *team, struct team_port *port)
1026 {
1027         if (team->ops.port_leave)
1028                 team->ops.port_leave(team, port);
1029         port->dev->priv_flags &= ~IFF_TEAM_PORT;
1030         dev_put(team->dev);
1031 }
1032
1033 #ifdef CONFIG_NET_POLL_CONTROLLER
1034 static int team_port_enable_netpoll(struct team *team, struct team_port *port,
1035                                     gfp_t gfp)
1036 {
1037         struct netpoll *np;
1038         int err;
1039
1040         if (!team->dev->npinfo)
1041                 return 0;
1042
1043         np = kzalloc(sizeof(*np), gfp);
1044         if (!np)
1045                 return -ENOMEM;
1046
1047         err = __netpoll_setup(np, port->dev, gfp);
1048         if (err) {
1049                 kfree(np);
1050                 return err;
1051         }
1052         port->np = np;
1053         return err;
1054 }
1055
1056 static void team_port_disable_netpoll(struct team_port *port)
1057 {
1058         struct netpoll *np = port->np;
1059
1060         if (!np)
1061                 return;
1062         port->np = NULL;
1063
1064         /* Wait for transmitting packets to finish before freeing. */
1065         synchronize_rcu_bh();
1066         __netpoll_cleanup(np);
1067         kfree(np);
1068 }
1069 #else
1070 static int team_port_enable_netpoll(struct team *team, struct team_port *port,
1071                                     gfp_t gfp)
1072 {
1073         return 0;
1074 }
1075 static void team_port_disable_netpoll(struct team_port *port)
1076 {
1077 }
1078 #endif
1079
1080 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1081 static int team_dev_type_check_change(struct net_device *dev,
1082                                       struct net_device *port_dev);
1083
1084 static int team_port_add(struct team *team, struct net_device *port_dev)
1085 {
1086         struct net_device *dev = team->dev;
1087         struct team_port *port;
1088         char *portname = port_dev->name;
1089         int err;
1090
1091         if (port_dev->flags & IFF_LOOPBACK) {
1092                 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1093                            portname);
1094                 return -EINVAL;
1095         }
1096
1097         if (team_port_exists(port_dev)) {
1098                 netdev_err(dev, "Device %s is already a port "
1099                                 "of a team device\n", portname);
1100                 return -EBUSY;
1101         }
1102
1103         if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1104             vlan_uses_dev(dev)) {
1105                 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1106                            portname);
1107                 return -EPERM;
1108         }
1109
1110         err = team_dev_type_check_change(dev, port_dev);
1111         if (err)
1112                 return err;
1113
1114         if (port_dev->flags & IFF_UP) {
1115                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1116                            portname);
1117                 return -EBUSY;
1118         }
1119
1120         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1121                        GFP_KERNEL);
1122         if (!port)
1123                 return -ENOMEM;
1124
1125         port->dev = port_dev;
1126         port->team = team;
1127         INIT_LIST_HEAD(&port->qom_list);
1128
1129         port->orig.mtu = port_dev->mtu;
1130         err = dev_set_mtu(port_dev, dev->mtu);
1131         if (err) {
1132                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1133                 goto err_set_mtu;
1134         }
1135
1136         memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1137
1138         err = team_port_enter(team, port);
1139         if (err) {
1140                 netdev_err(dev, "Device %s failed to enter team mode\n",
1141                            portname);
1142                 goto err_port_enter;
1143         }
1144
1145         err = dev_open(port_dev);
1146         if (err) {
1147                 netdev_dbg(dev, "Device %s opening failed\n",
1148                            portname);
1149                 goto err_dev_open;
1150         }
1151
1152         err = vlan_vids_add_by_dev(port_dev, dev);
1153         if (err) {
1154                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1155                                 portname);
1156                 goto err_vids_add;
1157         }
1158
1159         err = team_port_enable_netpoll(team, port, GFP_KERNEL);
1160         if (err) {
1161                 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1162                            portname);
1163                 goto err_enable_netpoll;
1164         }
1165
1166         err = netdev_master_upper_dev_link(port_dev, dev);
1167         if (err) {
1168                 netdev_err(dev, "Device %s failed to set upper link\n",
1169                            portname);
1170                 goto err_set_upper_link;
1171         }
1172
1173         err = netdev_rx_handler_register(port_dev, team_handle_frame,
1174                                          port);
1175         if (err) {
1176                 netdev_err(dev, "Device %s failed to register rx_handler\n",
1177                            portname);
1178                 goto err_handler_register;
1179         }
1180
1181         err = __team_option_inst_add_port(team, port);
1182         if (err) {
1183                 netdev_err(dev, "Device %s failed to add per-port options\n",
1184                            portname);
1185                 goto err_option_port_add;
1186         }
1187
1188         port->index = -1;
1189         list_add_tail_rcu(&port->list, &team->port_list);
1190         team_port_enable(team, port);
1191         __team_compute_features(team);
1192         __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1193         __team_options_change_check(team);
1194
1195         netdev_info(dev, "Port device %s added\n", portname);
1196
1197         return 0;
1198
1199 err_option_port_add:
1200         netdev_rx_handler_unregister(port_dev);
1201
1202 err_handler_register:
1203         netdev_upper_dev_unlink(port_dev, dev);
1204
1205 err_set_upper_link:
1206         team_port_disable_netpoll(port);
1207
1208 err_enable_netpoll:
1209         vlan_vids_del_by_dev(port_dev, dev);
1210
1211 err_vids_add:
1212         dev_close(port_dev);
1213
1214 err_dev_open:
1215         team_port_leave(team, port);
1216         team_port_set_orig_dev_addr(port);
1217
1218 err_port_enter:
1219         dev_set_mtu(port_dev, port->orig.mtu);
1220
1221 err_set_mtu:
1222         kfree(port);
1223
1224         return err;
1225 }
1226
1227 static void __team_port_change_port_removed(struct team_port *port);
1228
1229 static int team_port_del(struct team *team, struct net_device *port_dev)
1230 {
1231         struct net_device *dev = team->dev;
1232         struct team_port *port;
1233         char *portname = port_dev->name;
1234
1235         port = team_port_get_rtnl(port_dev);
1236         if (!port || !team_port_find(team, port)) {
1237                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1238                            portname);
1239                 return -ENOENT;
1240         }
1241
1242         team_port_disable(team, port);
1243         list_del_rcu(&port->list);
1244         netdev_rx_handler_unregister(port_dev);
1245         netdev_upper_dev_unlink(port_dev, dev);
1246         team_port_disable_netpoll(port);
1247         vlan_vids_del_by_dev(port_dev, dev);
1248         dev_uc_unsync(port_dev, dev);
1249         dev_mc_unsync(port_dev, dev);
1250         dev_close(port_dev);
1251         team_port_leave(team, port);
1252
1253         __team_option_inst_mark_removed_port(team, port);
1254         __team_options_change_check(team);
1255         __team_option_inst_del_port(team, port);
1256         __team_port_change_port_removed(port);
1257
1258         team_port_set_orig_dev_addr(port);
1259         dev_set_mtu(port_dev, port->orig.mtu);
1260         kfree_rcu(port, rcu);
1261         netdev_info(dev, "Port device %s removed\n", portname);
1262         __team_compute_features(team);
1263
1264         return 0;
1265 }
1266
1267
1268 /*****************
1269  * Net device ops
1270  *****************/
1271
1272 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1273 {
1274         ctx->data.str_val = team->mode->kind;
1275         return 0;
1276 }
1277
1278 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1279 {
1280         return team_change_mode(team, ctx->data.str_val);
1281 }
1282
1283 static int team_notify_peers_count_get(struct team *team,
1284                                        struct team_gsetter_ctx *ctx)
1285 {
1286         ctx->data.u32_val = team->notify_peers.count;
1287         return 0;
1288 }
1289
1290 static int team_notify_peers_count_set(struct team *team,
1291                                        struct team_gsetter_ctx *ctx)
1292 {
1293         team->notify_peers.count = ctx->data.u32_val;
1294         return 0;
1295 }
1296
1297 static int team_notify_peers_interval_get(struct team *team,
1298                                           struct team_gsetter_ctx *ctx)
1299 {
1300         ctx->data.u32_val = team->notify_peers.interval;
1301         return 0;
1302 }
1303
1304 static int team_notify_peers_interval_set(struct team *team,
1305                                           struct team_gsetter_ctx *ctx)
1306 {
1307         team->notify_peers.interval = ctx->data.u32_val;
1308         return 0;
1309 }
1310
1311 static int team_mcast_rejoin_count_get(struct team *team,
1312                                        struct team_gsetter_ctx *ctx)
1313 {
1314         ctx->data.u32_val = team->mcast_rejoin.count;
1315         return 0;
1316 }
1317
1318 static int team_mcast_rejoin_count_set(struct team *team,
1319                                        struct team_gsetter_ctx *ctx)
1320 {
1321         team->mcast_rejoin.count = ctx->data.u32_val;
1322         return 0;
1323 }
1324
1325 static int team_mcast_rejoin_interval_get(struct team *team,
1326                                           struct team_gsetter_ctx *ctx)
1327 {
1328         ctx->data.u32_val = team->mcast_rejoin.interval;
1329         return 0;
1330 }
1331
1332 static int team_mcast_rejoin_interval_set(struct team *team,
1333                                           struct team_gsetter_ctx *ctx)
1334 {
1335         team->mcast_rejoin.interval = ctx->data.u32_val;
1336         return 0;
1337 }
1338
1339 static int team_port_en_option_get(struct team *team,
1340                                    struct team_gsetter_ctx *ctx)
1341 {
1342         struct team_port *port = ctx->info->port;
1343
1344         ctx->data.bool_val = team_port_enabled(port);
1345         return 0;
1346 }
1347
1348 static int team_port_en_option_set(struct team *team,
1349                                    struct team_gsetter_ctx *ctx)
1350 {
1351         struct team_port *port = ctx->info->port;
1352
1353         if (ctx->data.bool_val)
1354                 team_port_enable(team, port);
1355         else
1356                 team_port_disable(team, port);
1357         return 0;
1358 }
1359
1360 static int team_user_linkup_option_get(struct team *team,
1361                                        struct team_gsetter_ctx *ctx)
1362 {
1363         struct team_port *port = ctx->info->port;
1364
1365         ctx->data.bool_val = port->user.linkup;
1366         return 0;
1367 }
1368
1369 static int team_user_linkup_option_set(struct team *team,
1370                                        struct team_gsetter_ctx *ctx)
1371 {
1372         struct team_port *port = ctx->info->port;
1373
1374         port->user.linkup = ctx->data.bool_val;
1375         team_refresh_port_linkup(port);
1376         return 0;
1377 }
1378
1379 static int team_user_linkup_en_option_get(struct team *team,
1380                                           struct team_gsetter_ctx *ctx)
1381 {
1382         struct team_port *port = ctx->info->port;
1383
1384         ctx->data.bool_val = port->user.linkup_enabled;
1385         return 0;
1386 }
1387
1388 static int team_user_linkup_en_option_set(struct team *team,
1389                                           struct team_gsetter_ctx *ctx)
1390 {
1391         struct team_port *port = ctx->info->port;
1392
1393         port->user.linkup_enabled = ctx->data.bool_val;
1394         team_refresh_port_linkup(port);
1395         return 0;
1396 }
1397
1398 static int team_priority_option_get(struct team *team,
1399                                     struct team_gsetter_ctx *ctx)
1400 {
1401         struct team_port *port = ctx->info->port;
1402
1403         ctx->data.s32_val = port->priority;
1404         return 0;
1405 }
1406
1407 static int team_priority_option_set(struct team *team,
1408                                     struct team_gsetter_ctx *ctx)
1409 {
1410         struct team_port *port = ctx->info->port;
1411         s32 priority = ctx->data.s32_val;
1412
1413         if (port->priority == priority)
1414                 return 0;
1415         port->priority = priority;
1416         team_queue_override_port_prio_changed(team, port);
1417         return 0;
1418 }
1419
1420 static int team_queue_id_option_get(struct team *team,
1421                                     struct team_gsetter_ctx *ctx)
1422 {
1423         struct team_port *port = ctx->info->port;
1424
1425         ctx->data.u32_val = port->queue_id;
1426         return 0;
1427 }
1428
1429 static int team_queue_id_option_set(struct team *team,
1430                                     struct team_gsetter_ctx *ctx)
1431 {
1432         struct team_port *port = ctx->info->port;
1433         u16 new_queue_id = ctx->data.u32_val;
1434
1435         if (port->queue_id == new_queue_id)
1436                 return 0;
1437         if (new_queue_id >= team->dev->real_num_tx_queues)
1438                 return -EINVAL;
1439         team_queue_override_port_change_queue_id(team, port, new_queue_id);
1440         return 0;
1441 }
1442
1443 static const struct team_option team_options[] = {
1444         {
1445                 .name = "mode",
1446                 .type = TEAM_OPTION_TYPE_STRING,
1447                 .getter = team_mode_option_get,
1448                 .setter = team_mode_option_set,
1449         },
1450         {
1451                 .name = "notify_peers_count",
1452                 .type = TEAM_OPTION_TYPE_U32,
1453                 .getter = team_notify_peers_count_get,
1454                 .setter = team_notify_peers_count_set,
1455         },
1456         {
1457                 .name = "notify_peers_interval",
1458                 .type = TEAM_OPTION_TYPE_U32,
1459                 .getter = team_notify_peers_interval_get,
1460                 .setter = team_notify_peers_interval_set,
1461         },
1462         {
1463                 .name = "mcast_rejoin_count",
1464                 .type = TEAM_OPTION_TYPE_U32,
1465                 .getter = team_mcast_rejoin_count_get,
1466                 .setter = team_mcast_rejoin_count_set,
1467         },
1468         {
1469                 .name = "mcast_rejoin_interval",
1470                 .type = TEAM_OPTION_TYPE_U32,
1471                 .getter = team_mcast_rejoin_interval_get,
1472                 .setter = team_mcast_rejoin_interval_set,
1473         },
1474         {
1475                 .name = "enabled",
1476                 .type = TEAM_OPTION_TYPE_BOOL,
1477                 .per_port = true,
1478                 .getter = team_port_en_option_get,
1479                 .setter = team_port_en_option_set,
1480         },
1481         {
1482                 .name = "user_linkup",
1483                 .type = TEAM_OPTION_TYPE_BOOL,
1484                 .per_port = true,
1485                 .getter = team_user_linkup_option_get,
1486                 .setter = team_user_linkup_option_set,
1487         },
1488         {
1489                 .name = "user_linkup_enabled",
1490                 .type = TEAM_OPTION_TYPE_BOOL,
1491                 .per_port = true,
1492                 .getter = team_user_linkup_en_option_get,
1493                 .setter = team_user_linkup_en_option_set,
1494         },
1495         {
1496                 .name = "priority",
1497                 .type = TEAM_OPTION_TYPE_S32,
1498                 .per_port = true,
1499                 .getter = team_priority_option_get,
1500                 .setter = team_priority_option_set,
1501         },
1502         {
1503                 .name = "queue_id",
1504                 .type = TEAM_OPTION_TYPE_U32,
1505                 .per_port = true,
1506                 .getter = team_queue_id_option_get,
1507                 .setter = team_queue_id_option_set,
1508         },
1509 };
1510
1511 static struct lock_class_key team_netdev_xmit_lock_key;
1512 static struct lock_class_key team_netdev_addr_lock_key;
1513 static struct lock_class_key team_tx_busylock_key;
1514
1515 static void team_set_lockdep_class_one(struct net_device *dev,
1516                                        struct netdev_queue *txq,
1517                                        void *unused)
1518 {
1519         lockdep_set_class(&txq->_xmit_lock, &team_netdev_xmit_lock_key);
1520 }
1521
1522 static void team_set_lockdep_class(struct net_device *dev)
1523 {
1524         lockdep_set_class(&dev->addr_list_lock, &team_netdev_addr_lock_key);
1525         netdev_for_each_tx_queue(dev, team_set_lockdep_class_one, NULL);
1526         dev->qdisc_tx_busylock = &team_tx_busylock_key;
1527 }
1528
1529 static int team_init(struct net_device *dev)
1530 {
1531         struct team *team = netdev_priv(dev);
1532         int i;
1533         int err;
1534
1535         team->dev = dev;
1536         mutex_init(&team->lock);
1537         team_set_no_mode(team);
1538
1539         team->pcpu_stats = alloc_percpu(struct team_pcpu_stats);
1540         if (!team->pcpu_stats)
1541                 return -ENOMEM;
1542
1543         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1544                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1545         INIT_LIST_HEAD(&team->port_list);
1546         err = team_queue_override_init(team);
1547         if (err)
1548                 goto err_team_queue_override_init;
1549
1550         team_adjust_ops(team);
1551
1552         INIT_LIST_HEAD(&team->option_list);
1553         INIT_LIST_HEAD(&team->option_inst_list);
1554
1555         team_notify_peers_init(team);
1556         team_mcast_rejoin_init(team);
1557
1558         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1559         if (err)
1560                 goto err_options_register;
1561         netif_carrier_off(dev);
1562
1563         team_set_lockdep_class(dev);
1564
1565         return 0;
1566
1567 err_options_register:
1568         team_mcast_rejoin_fini(team);
1569         team_notify_peers_fini(team);
1570         team_queue_override_fini(team);
1571 err_team_queue_override_init:
1572         free_percpu(team->pcpu_stats);
1573
1574         return err;
1575 }
1576
1577 static void team_uninit(struct net_device *dev)
1578 {
1579         struct team *team = netdev_priv(dev);
1580         struct team_port *port;
1581         struct team_port *tmp;
1582
1583         mutex_lock(&team->lock);
1584         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1585                 team_port_del(team, port->dev);
1586
1587         __team_change_mode(team, NULL); /* cleanup */
1588         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1589         team_mcast_rejoin_fini(team);
1590         team_notify_peers_fini(team);
1591         team_queue_override_fini(team);
1592         mutex_unlock(&team->lock);
1593 }
1594
1595 static void team_destructor(struct net_device *dev)
1596 {
1597         struct team *team = netdev_priv(dev);
1598
1599         free_percpu(team->pcpu_stats);
1600         free_netdev(dev);
1601 }
1602
1603 static int team_open(struct net_device *dev)
1604 {
1605         return 0;
1606 }
1607
1608 static int team_close(struct net_device *dev)
1609 {
1610         return 0;
1611 }
1612
1613 /*
1614  * note: already called with rcu_read_lock
1615  */
1616 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1617 {
1618         struct team *team = netdev_priv(dev);
1619         bool tx_success;
1620         unsigned int len = skb->len;
1621
1622         tx_success = team_queue_override_transmit(team, skb);
1623         if (!tx_success)
1624                 tx_success = team->ops.transmit(team, skb);
1625         if (tx_success) {
1626                 struct team_pcpu_stats *pcpu_stats;
1627
1628                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1629                 u64_stats_update_begin(&pcpu_stats->syncp);
1630                 pcpu_stats->tx_packets++;
1631                 pcpu_stats->tx_bytes += len;
1632                 u64_stats_update_end(&pcpu_stats->syncp);
1633         } else {
1634                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1635         }
1636
1637         return NETDEV_TX_OK;
1638 }
1639
1640 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb)
1641 {
1642         /*
1643          * This helper function exists to help dev_pick_tx get the correct
1644          * destination queue.  Using a helper function skips a call to
1645          * skb_tx_hash and will put the skbs in the queue we expect on their
1646          * way down to the team driver.
1647          */
1648         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1649
1650         /*
1651          * Save the original txq to restore before passing to the driver
1652          */
1653         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1654
1655         if (unlikely(txq >= dev->real_num_tx_queues)) {
1656                 do {
1657                         txq -= dev->real_num_tx_queues;
1658                 } while (txq >= dev->real_num_tx_queues);
1659         }
1660         return txq;
1661 }
1662
1663 static void team_change_rx_flags(struct net_device *dev, int change)
1664 {
1665         struct team *team = netdev_priv(dev);
1666         struct team_port *port;
1667         int inc;
1668
1669         rcu_read_lock();
1670         list_for_each_entry_rcu(port, &team->port_list, list) {
1671                 if (change & IFF_PROMISC) {
1672                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1673                         dev_set_promiscuity(port->dev, inc);
1674                 }
1675                 if (change & IFF_ALLMULTI) {
1676                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1677                         dev_set_allmulti(port->dev, inc);
1678                 }
1679         }
1680         rcu_read_unlock();
1681 }
1682
1683 static void team_set_rx_mode(struct net_device *dev)
1684 {
1685         struct team *team = netdev_priv(dev);
1686         struct team_port *port;
1687
1688         rcu_read_lock();
1689         list_for_each_entry_rcu(port, &team->port_list, list) {
1690                 dev_uc_sync_multiple(port->dev, dev);
1691                 dev_mc_sync_multiple(port->dev, dev);
1692         }
1693         rcu_read_unlock();
1694 }
1695
1696 static int team_set_mac_address(struct net_device *dev, void *p)
1697 {
1698         struct sockaddr *addr = p;
1699         struct team *team = netdev_priv(dev);
1700         struct team_port *port;
1701
1702         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1703                 return -EADDRNOTAVAIL;
1704         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1705         rcu_read_lock();
1706         list_for_each_entry_rcu(port, &team->port_list, list)
1707                 if (team->ops.port_change_dev_addr)
1708                         team->ops.port_change_dev_addr(team, port);
1709         rcu_read_unlock();
1710         return 0;
1711 }
1712
1713 static int team_change_mtu(struct net_device *dev, int new_mtu)
1714 {
1715         struct team *team = netdev_priv(dev);
1716         struct team_port *port;
1717         int err;
1718
1719         /*
1720          * Alhough this is reader, it's guarded by team lock. It's not possible
1721          * to traverse list in reverse under rcu_read_lock
1722          */
1723         mutex_lock(&team->lock);
1724         list_for_each_entry(port, &team->port_list, list) {
1725                 err = dev_set_mtu(port->dev, new_mtu);
1726                 if (err) {
1727                         netdev_err(dev, "Device %s failed to change mtu",
1728                                    port->dev->name);
1729                         goto unwind;
1730                 }
1731         }
1732         mutex_unlock(&team->lock);
1733
1734         dev->mtu = new_mtu;
1735
1736         return 0;
1737
1738 unwind:
1739         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1740                 dev_set_mtu(port->dev, dev->mtu);
1741         mutex_unlock(&team->lock);
1742
1743         return err;
1744 }
1745
1746 static struct rtnl_link_stats64 *
1747 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1748 {
1749         struct team *team = netdev_priv(dev);
1750         struct team_pcpu_stats *p;
1751         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1752         u32 rx_dropped = 0, tx_dropped = 0;
1753         unsigned int start;
1754         int i;
1755
1756         for_each_possible_cpu(i) {
1757                 p = per_cpu_ptr(team->pcpu_stats, i);
1758                 do {
1759                         start = u64_stats_fetch_begin_bh(&p->syncp);
1760                         rx_packets      = p->rx_packets;
1761                         rx_bytes        = p->rx_bytes;
1762                         rx_multicast    = p->rx_multicast;
1763                         tx_packets      = p->tx_packets;
1764                         tx_bytes        = p->tx_bytes;
1765                 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
1766
1767                 stats->rx_packets       += rx_packets;
1768                 stats->rx_bytes         += rx_bytes;
1769                 stats->multicast        += rx_multicast;
1770                 stats->tx_packets       += tx_packets;
1771                 stats->tx_bytes         += tx_bytes;
1772                 /*
1773                  * rx_dropped & tx_dropped are u32, updated
1774                  * without syncp protection.
1775                  */
1776                 rx_dropped      += p->rx_dropped;
1777                 tx_dropped      += p->tx_dropped;
1778         }
1779         stats->rx_dropped       = rx_dropped;
1780         stats->tx_dropped       = tx_dropped;
1781         return stats;
1782 }
1783
1784 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1785 {
1786         struct team *team = netdev_priv(dev);
1787         struct team_port *port;
1788         int err;
1789
1790         /*
1791          * Alhough this is reader, it's guarded by team lock. It's not possible
1792          * to traverse list in reverse under rcu_read_lock
1793          */
1794         mutex_lock(&team->lock);
1795         list_for_each_entry(port, &team->port_list, list) {
1796                 err = vlan_vid_add(port->dev, proto, vid);
1797                 if (err)
1798                         goto unwind;
1799         }
1800         mutex_unlock(&team->lock);
1801
1802         return 0;
1803
1804 unwind:
1805         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1806                 vlan_vid_del(port->dev, proto, vid);
1807         mutex_unlock(&team->lock);
1808
1809         return err;
1810 }
1811
1812 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1813 {
1814         struct team *team = netdev_priv(dev);
1815         struct team_port *port;
1816
1817         rcu_read_lock();
1818         list_for_each_entry_rcu(port, &team->port_list, list)
1819                 vlan_vid_del(port->dev, proto, vid);
1820         rcu_read_unlock();
1821
1822         return 0;
1823 }
1824
1825 #ifdef CONFIG_NET_POLL_CONTROLLER
1826 static void team_poll_controller(struct net_device *dev)
1827 {
1828 }
1829
1830 static void __team_netpoll_cleanup(struct team *team)
1831 {
1832         struct team_port *port;
1833
1834         list_for_each_entry(port, &team->port_list, list)
1835                 team_port_disable_netpoll(port);
1836 }
1837
1838 static void team_netpoll_cleanup(struct net_device *dev)
1839 {
1840         struct team *team = netdev_priv(dev);
1841
1842         mutex_lock(&team->lock);
1843         __team_netpoll_cleanup(team);
1844         mutex_unlock(&team->lock);
1845 }
1846
1847 static int team_netpoll_setup(struct net_device *dev,
1848                               struct netpoll_info *npifo, gfp_t gfp)
1849 {
1850         struct team *team = netdev_priv(dev);
1851         struct team_port *port;
1852         int err = 0;
1853
1854         mutex_lock(&team->lock);
1855         list_for_each_entry(port, &team->port_list, list) {
1856                 err = team_port_enable_netpoll(team, port, gfp);
1857                 if (err) {
1858                         __team_netpoll_cleanup(team);
1859                         break;
1860                 }
1861         }
1862         mutex_unlock(&team->lock);
1863         return err;
1864 }
1865 #endif
1866
1867 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1868 {
1869         struct team *team = netdev_priv(dev);
1870         int err;
1871
1872         mutex_lock(&team->lock);
1873         err = team_port_add(team, port_dev);
1874         mutex_unlock(&team->lock);
1875         return err;
1876 }
1877
1878 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1879 {
1880         struct team *team = netdev_priv(dev);
1881         int err;
1882
1883         mutex_lock(&team->lock);
1884         err = team_port_del(team, port_dev);
1885         mutex_unlock(&team->lock);
1886         return err;
1887 }
1888
1889 static netdev_features_t team_fix_features(struct net_device *dev,
1890                                            netdev_features_t features)
1891 {
1892         struct team_port *port;
1893         struct team *team = netdev_priv(dev);
1894         netdev_features_t mask;
1895
1896         mask = features;
1897         features &= ~NETIF_F_ONE_FOR_ALL;
1898         features |= NETIF_F_ALL_FOR_ALL;
1899
1900         rcu_read_lock();
1901         list_for_each_entry_rcu(port, &team->port_list, list) {
1902                 features = netdev_increment_features(features,
1903                                                      port->dev->features,
1904                                                      mask);
1905         }
1906         rcu_read_unlock();
1907         return features;
1908 }
1909
1910 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1911 {
1912         struct team *team = netdev_priv(dev);
1913
1914         team->user_carrier_enabled = true;
1915
1916         if (new_carrier)
1917                 netif_carrier_on(dev);
1918         else
1919                 netif_carrier_off(dev);
1920         return 0;
1921 }
1922
1923 static const struct net_device_ops team_netdev_ops = {
1924         .ndo_init               = team_init,
1925         .ndo_uninit             = team_uninit,
1926         .ndo_open               = team_open,
1927         .ndo_stop               = team_close,
1928         .ndo_start_xmit         = team_xmit,
1929         .ndo_select_queue       = team_select_queue,
1930         .ndo_change_rx_flags    = team_change_rx_flags,
1931         .ndo_set_rx_mode        = team_set_rx_mode,
1932         .ndo_set_mac_address    = team_set_mac_address,
1933         .ndo_change_mtu         = team_change_mtu,
1934         .ndo_get_stats64        = team_get_stats64,
1935         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
1936         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
1937 #ifdef CONFIG_NET_POLL_CONTROLLER
1938         .ndo_poll_controller    = team_poll_controller,
1939         .ndo_netpoll_setup      = team_netpoll_setup,
1940         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
1941 #endif
1942         .ndo_add_slave          = team_add_slave,
1943         .ndo_del_slave          = team_del_slave,
1944         .ndo_fix_features       = team_fix_features,
1945         .ndo_change_carrier     = team_change_carrier,
1946 };
1947
1948 /***********************
1949  * ethtool interface
1950  ***********************/
1951
1952 static void team_ethtool_get_drvinfo(struct net_device *dev,
1953                                      struct ethtool_drvinfo *drvinfo)
1954 {
1955         strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
1956         strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
1957 }
1958
1959 static const struct ethtool_ops team_ethtool_ops = {
1960         .get_drvinfo            = team_ethtool_get_drvinfo,
1961         .get_link               = ethtool_op_get_link,
1962 };
1963
1964 /***********************
1965  * rt netlink interface
1966  ***********************/
1967
1968 static void team_setup_by_port(struct net_device *dev,
1969                                struct net_device *port_dev)
1970 {
1971         dev->header_ops = port_dev->header_ops;
1972         dev->type = port_dev->type;
1973         dev->hard_header_len = port_dev->hard_header_len;
1974         dev->addr_len = port_dev->addr_len;
1975         dev->mtu = port_dev->mtu;
1976         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
1977         memcpy(dev->dev_addr, port_dev->dev_addr, port_dev->addr_len);
1978 }
1979
1980 static int team_dev_type_check_change(struct net_device *dev,
1981                                       struct net_device *port_dev)
1982 {
1983         struct team *team = netdev_priv(dev);
1984         char *portname = port_dev->name;
1985         int err;
1986
1987         if (dev->type == port_dev->type)
1988                 return 0;
1989         if (!list_empty(&team->port_list)) {
1990                 netdev_err(dev, "Device %s is of different type\n", portname);
1991                 return -EBUSY;
1992         }
1993         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
1994         err = notifier_to_errno(err);
1995         if (err) {
1996                 netdev_err(dev, "Refused to change device type\n");
1997                 return err;
1998         }
1999         dev_uc_flush(dev);
2000         dev_mc_flush(dev);
2001         team_setup_by_port(dev, port_dev);
2002         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2003         return 0;
2004 }
2005
2006 static void team_setup(struct net_device *dev)
2007 {
2008         ether_setup(dev);
2009
2010         dev->netdev_ops = &team_netdev_ops;
2011         dev->ethtool_ops = &team_ethtool_ops;
2012         dev->destructor = team_destructor;
2013         dev->tx_queue_len = 0;
2014         dev->flags |= IFF_MULTICAST;
2015         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2016
2017         /*
2018          * Indicate we support unicast address filtering. That way core won't
2019          * bring us to promisc mode in case a unicast addr is added.
2020          * Let this up to underlay drivers.
2021          */
2022         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2023
2024         dev->features |= NETIF_F_LLTX;
2025         dev->features |= NETIF_F_GRO;
2026         dev->hw_features = TEAM_VLAN_FEATURES |
2027                            NETIF_F_HW_VLAN_CTAG_TX |
2028                            NETIF_F_HW_VLAN_CTAG_RX |
2029                            NETIF_F_HW_VLAN_CTAG_FILTER;
2030
2031         dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_HW_CSUM);
2032         dev->features |= dev->hw_features;
2033 }
2034
2035 static int team_newlink(struct net *src_net, struct net_device *dev,
2036                         struct nlattr *tb[], struct nlattr *data[])
2037 {
2038         int err;
2039
2040         if (tb[IFLA_ADDRESS] == NULL)
2041                 eth_hw_addr_random(dev);
2042
2043         err = register_netdevice(dev);
2044         if (err)
2045                 return err;
2046
2047         return 0;
2048 }
2049
2050 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
2051 {
2052         if (tb[IFLA_ADDRESS]) {
2053                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2054                         return -EINVAL;
2055                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2056                         return -EADDRNOTAVAIL;
2057         }
2058         return 0;
2059 }
2060
2061 static unsigned int team_get_num_tx_queues(void)
2062 {
2063         return TEAM_DEFAULT_NUM_TX_QUEUES;
2064 }
2065
2066 static unsigned int team_get_num_rx_queues(void)
2067 {
2068         return TEAM_DEFAULT_NUM_RX_QUEUES;
2069 }
2070
2071 static struct rtnl_link_ops team_link_ops __read_mostly = {
2072         .kind                   = DRV_NAME,
2073         .priv_size              = sizeof(struct team),
2074         .setup                  = team_setup,
2075         .newlink                = team_newlink,
2076         .validate               = team_validate,
2077         .get_num_tx_queues      = team_get_num_tx_queues,
2078         .get_num_rx_queues      = team_get_num_rx_queues,
2079 };
2080
2081
2082 /***********************************
2083  * Generic netlink custom interface
2084  ***********************************/
2085
2086 static struct genl_family team_nl_family = {
2087         .id             = GENL_ID_GENERATE,
2088         .name           = TEAM_GENL_NAME,
2089         .version        = TEAM_GENL_VERSION,
2090         .maxattr        = TEAM_ATTR_MAX,
2091         .netnsok        = true,
2092 };
2093
2094 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2095         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
2096         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
2097         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
2098         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
2099 };
2100
2101 static const struct nla_policy
2102 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2103         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
2104         [TEAM_ATTR_OPTION_NAME] = {
2105                 .type = NLA_STRING,
2106                 .len = TEAM_STRING_MAX_LEN,
2107         },
2108         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
2109         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
2110         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
2111 };
2112
2113 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2114 {
2115         struct sk_buff *msg;
2116         void *hdr;
2117         int err;
2118
2119         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2120         if (!msg)
2121                 return -ENOMEM;
2122
2123         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2124                           &team_nl_family, 0, TEAM_CMD_NOOP);
2125         if (!hdr) {
2126                 err = -EMSGSIZE;
2127                 goto err_msg_put;
2128         }
2129
2130         genlmsg_end(msg, hdr);
2131
2132         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2133
2134 err_msg_put:
2135         nlmsg_free(msg);
2136
2137         return err;
2138 }
2139
2140 /*
2141  * Netlink cmd functions should be locked by following two functions.
2142  * Since dev gets held here, that ensures dev won't disappear in between.
2143  */
2144 static struct team *team_nl_team_get(struct genl_info *info)
2145 {
2146         struct net *net = genl_info_net(info);
2147         int ifindex;
2148         struct net_device *dev;
2149         struct team *team;
2150
2151         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2152                 return NULL;
2153
2154         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2155         dev = dev_get_by_index(net, ifindex);
2156         if (!dev || dev->netdev_ops != &team_netdev_ops) {
2157                 if (dev)
2158                         dev_put(dev);
2159                 return NULL;
2160         }
2161
2162         team = netdev_priv(dev);
2163         mutex_lock(&team->lock);
2164         return team;
2165 }
2166
2167 static void team_nl_team_put(struct team *team)
2168 {
2169         mutex_unlock(&team->lock);
2170         dev_put(team->dev);
2171 }
2172
2173 typedef int team_nl_send_func_t(struct sk_buff *skb,
2174                                 struct team *team, u32 portid);
2175
2176 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2177 {
2178         return genlmsg_unicast(dev_net(team->dev), skb, portid);
2179 }
2180
2181 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2182                                        struct team_option_inst *opt_inst)
2183 {
2184         struct nlattr *option_item;
2185         struct team_option *option = opt_inst->option;
2186         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2187         struct team_gsetter_ctx ctx;
2188         int err;
2189
2190         ctx.info = opt_inst_info;
2191         err = team_option_get(team, opt_inst, &ctx);
2192         if (err)
2193                 return err;
2194
2195         option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2196         if (!option_item)
2197                 return -EMSGSIZE;
2198
2199         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2200                 goto nest_cancel;
2201         if (opt_inst_info->port &&
2202             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2203                         opt_inst_info->port->dev->ifindex))
2204                 goto nest_cancel;
2205         if (opt_inst->option->array_size &&
2206             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2207                         opt_inst_info->array_index))
2208                 goto nest_cancel;
2209
2210         switch (option->type) {
2211         case TEAM_OPTION_TYPE_U32:
2212                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2213                         goto nest_cancel;
2214                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2215                         goto nest_cancel;
2216                 break;
2217         case TEAM_OPTION_TYPE_STRING:
2218                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2219                         goto nest_cancel;
2220                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2221                                    ctx.data.str_val))
2222                         goto nest_cancel;
2223                 break;
2224         case TEAM_OPTION_TYPE_BINARY:
2225                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2226                         goto nest_cancel;
2227                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2228                             ctx.data.bin_val.ptr))
2229                         goto nest_cancel;
2230                 break;
2231         case TEAM_OPTION_TYPE_BOOL:
2232                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2233                         goto nest_cancel;
2234                 if (ctx.data.bool_val &&
2235                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2236                         goto nest_cancel;
2237                 break;
2238         case TEAM_OPTION_TYPE_S32:
2239                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2240                         goto nest_cancel;
2241                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2242                         goto nest_cancel;
2243                 break;
2244         default:
2245                 BUG();
2246         }
2247         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2248                 goto nest_cancel;
2249         if (opt_inst->changed) {
2250                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2251                         goto nest_cancel;
2252                 opt_inst->changed = false;
2253         }
2254         nla_nest_end(skb, option_item);
2255         return 0;
2256
2257 nest_cancel:
2258         nla_nest_cancel(skb, option_item);
2259         return -EMSGSIZE;
2260 }
2261
2262 static int __send_and_alloc_skb(struct sk_buff **pskb,
2263                                 struct team *team, u32 portid,
2264                                 team_nl_send_func_t *send_func)
2265 {
2266         int err;
2267
2268         if (*pskb) {
2269                 err = send_func(*pskb, team, portid);
2270                 if (err)
2271                         return err;
2272         }
2273         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2274         if (!*pskb)
2275                 return -ENOMEM;
2276         return 0;
2277 }
2278
2279 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2280                                     int flags, team_nl_send_func_t *send_func,
2281                                     struct list_head *sel_opt_inst_list)
2282 {
2283         struct nlattr *option_list;
2284         struct nlmsghdr *nlh;
2285         void *hdr;
2286         struct team_option_inst *opt_inst;
2287         int err;
2288         struct sk_buff *skb = NULL;
2289         bool incomplete;
2290         int i;
2291
2292         opt_inst = list_first_entry(sel_opt_inst_list,
2293                                     struct team_option_inst, tmp_list);
2294
2295 start_again:
2296         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2297         if (err)
2298                 return err;
2299
2300         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2301                           TEAM_CMD_OPTIONS_GET);
2302         if (!hdr)
2303                 return -EMSGSIZE;
2304
2305         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2306                 goto nla_put_failure;
2307         option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2308         if (!option_list)
2309                 goto nla_put_failure;
2310
2311         i = 0;
2312         incomplete = false;
2313         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2314                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2315                 if (err) {
2316                         if (err == -EMSGSIZE) {
2317                                 if (!i)
2318                                         goto errout;
2319                                 incomplete = true;
2320                                 break;
2321                         }
2322                         goto errout;
2323                 }
2324                 i++;
2325         }
2326
2327         nla_nest_end(skb, option_list);
2328         genlmsg_end(skb, hdr);
2329         if (incomplete)
2330                 goto start_again;
2331
2332 send_done:
2333         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2334         if (!nlh) {
2335                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2336                 if (err)
2337                         goto errout;
2338                 goto send_done;
2339         }
2340
2341         return send_func(skb, team, portid);
2342
2343 nla_put_failure:
2344         err = -EMSGSIZE;
2345 errout:
2346         genlmsg_cancel(skb, hdr);
2347         nlmsg_free(skb);
2348         return err;
2349 }
2350
2351 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2352 {
2353         struct team *team;
2354         struct team_option_inst *opt_inst;
2355         int err;
2356         LIST_HEAD(sel_opt_inst_list);
2357
2358         team = team_nl_team_get(info);
2359         if (!team)
2360                 return -EINVAL;
2361
2362         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2363                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2364         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2365                                        NLM_F_ACK, team_nl_send_unicast,
2366                                        &sel_opt_inst_list);
2367
2368         team_nl_team_put(team);
2369
2370         return err;
2371 }
2372
2373 static int team_nl_send_event_options_get(struct team *team,
2374                                           struct list_head *sel_opt_inst_list);
2375
2376 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2377 {
2378         struct team *team;
2379         int err = 0;
2380         int i;
2381         struct nlattr *nl_option;
2382         LIST_HEAD(opt_inst_list);
2383
2384         team = team_nl_team_get(info);
2385         if (!team)
2386                 return -EINVAL;
2387
2388         err = -EINVAL;
2389         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2390                 err = -EINVAL;
2391                 goto team_put;
2392         }
2393
2394         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2395                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2396                 struct nlattr *attr;
2397                 struct nlattr *attr_data;
2398                 enum team_option_type opt_type;
2399                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2400                 u32 opt_array_index = 0;
2401                 bool opt_is_array = false;
2402                 struct team_option_inst *opt_inst;
2403                 char *opt_name;
2404                 bool opt_found = false;
2405
2406                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2407                         err = -EINVAL;
2408                         goto team_put;
2409                 }
2410                 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2411                                        nl_option, team_nl_option_policy);
2412                 if (err)
2413                         goto team_put;
2414                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2415                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2416                         err = -EINVAL;
2417                         goto team_put;
2418                 }
2419                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2420                 case NLA_U32:
2421                         opt_type = TEAM_OPTION_TYPE_U32;
2422                         break;
2423                 case NLA_STRING:
2424                         opt_type = TEAM_OPTION_TYPE_STRING;
2425                         break;
2426                 case NLA_BINARY:
2427                         opt_type = TEAM_OPTION_TYPE_BINARY;
2428                         break;
2429                 case NLA_FLAG:
2430                         opt_type = TEAM_OPTION_TYPE_BOOL;
2431                         break;
2432                 case NLA_S32:
2433                         opt_type = TEAM_OPTION_TYPE_S32;
2434                         break;
2435                 default:
2436                         goto team_put;
2437                 }
2438
2439                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2440                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2441                         err = -EINVAL;
2442                         goto team_put;
2443                 }
2444
2445                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2446                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2447                 if (attr)
2448                         opt_port_ifindex = nla_get_u32(attr);
2449
2450                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2451                 if (attr) {
2452                         opt_is_array = true;
2453                         opt_array_index = nla_get_u32(attr);
2454                 }
2455
2456                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2457                         struct team_option *option = opt_inst->option;
2458                         struct team_gsetter_ctx ctx;
2459                         struct team_option_inst_info *opt_inst_info;
2460                         int tmp_ifindex;
2461
2462                         opt_inst_info = &opt_inst->info;
2463                         tmp_ifindex = opt_inst_info->port ?
2464                                       opt_inst_info->port->dev->ifindex : 0;
2465                         if (option->type != opt_type ||
2466                             strcmp(option->name, opt_name) ||
2467                             tmp_ifindex != opt_port_ifindex ||
2468                             (option->array_size && !opt_is_array) ||
2469                             opt_inst_info->array_index != opt_array_index)
2470                                 continue;
2471                         opt_found = true;
2472                         ctx.info = opt_inst_info;
2473                         switch (opt_type) {
2474                         case TEAM_OPTION_TYPE_U32:
2475                                 ctx.data.u32_val = nla_get_u32(attr_data);
2476                                 break;
2477                         case TEAM_OPTION_TYPE_STRING:
2478                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2479                                         err = -EINVAL;
2480                                         goto team_put;
2481                                 }
2482                                 ctx.data.str_val = nla_data(attr_data);
2483                                 break;
2484                         case TEAM_OPTION_TYPE_BINARY:
2485                                 ctx.data.bin_val.len = nla_len(attr_data);
2486                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2487                                 break;
2488                         case TEAM_OPTION_TYPE_BOOL:
2489                                 ctx.data.bool_val = attr_data ? true : false;
2490                                 break;
2491                         case TEAM_OPTION_TYPE_S32:
2492                                 ctx.data.s32_val = nla_get_s32(attr_data);
2493                                 break;
2494                         default:
2495                                 BUG();
2496                         }
2497                         err = team_option_set(team, opt_inst, &ctx);
2498                         if (err)
2499                                 goto team_put;
2500                         opt_inst->changed = true;
2501                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2502                 }
2503                 if (!opt_found) {
2504                         err = -ENOENT;
2505                         goto team_put;
2506                 }
2507         }
2508
2509         err = team_nl_send_event_options_get(team, &opt_inst_list);
2510
2511 team_put:
2512         team_nl_team_put(team);
2513
2514         return err;
2515 }
2516
2517 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2518                                      struct team_port *port)
2519 {
2520         struct nlattr *port_item;
2521
2522         port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2523         if (!port_item)
2524                 goto nest_cancel;
2525         if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2526                 goto nest_cancel;
2527         if (port->changed) {
2528                 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2529                         goto nest_cancel;
2530                 port->changed = false;
2531         }
2532         if ((port->removed &&
2533              nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2534             (port->state.linkup &&
2535              nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2536             nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2537             nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2538                 goto nest_cancel;
2539         nla_nest_end(skb, port_item);
2540         return 0;
2541
2542 nest_cancel:
2543         nla_nest_cancel(skb, port_item);
2544         return -EMSGSIZE;
2545 }
2546
2547 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2548                                       int flags, team_nl_send_func_t *send_func,
2549                                       struct team_port *one_port)
2550 {
2551         struct nlattr *port_list;
2552         struct nlmsghdr *nlh;
2553         void *hdr;
2554         struct team_port *port;
2555         int err;
2556         struct sk_buff *skb = NULL;
2557         bool incomplete;
2558         int i;
2559
2560         port = list_first_entry_or_null(&team->port_list,
2561                                         struct team_port, list);
2562
2563 start_again:
2564         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2565         if (err)
2566                 return err;
2567
2568         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2569                           TEAM_CMD_PORT_LIST_GET);
2570         if (!hdr)
2571                 return -EMSGSIZE;
2572
2573         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2574                 goto nla_put_failure;
2575         port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2576         if (!port_list)
2577                 goto nla_put_failure;
2578
2579         i = 0;
2580         incomplete = false;
2581
2582         /* If one port is selected, called wants to send port list containing
2583          * only this port. Otherwise go through all listed ports and send all
2584          */
2585         if (one_port) {
2586                 err = team_nl_fill_one_port_get(skb, one_port);
2587                 if (err)
2588                         goto errout;
2589         } else if (port) {
2590                 list_for_each_entry_from(port, &team->port_list, list) {
2591                         err = team_nl_fill_one_port_get(skb, port);
2592                         if (err) {
2593                                 if (err == -EMSGSIZE) {
2594                                         if (!i)
2595                                                 goto errout;
2596                                         incomplete = true;
2597                                         break;
2598                                 }
2599                                 goto errout;
2600                         }
2601                         i++;
2602                 }
2603         }
2604
2605         nla_nest_end(skb, port_list);
2606         genlmsg_end(skb, hdr);
2607         if (incomplete)
2608                 goto start_again;
2609
2610 send_done:
2611         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2612         if (!nlh) {
2613                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2614                 if (err)
2615                         goto errout;
2616                 goto send_done;
2617         }
2618
2619         return send_func(skb, team, portid);
2620
2621 nla_put_failure:
2622         err = -EMSGSIZE;
2623 errout:
2624         genlmsg_cancel(skb, hdr);
2625         nlmsg_free(skb);
2626         return err;
2627 }
2628
2629 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2630                                      struct genl_info *info)
2631 {
2632         struct team *team;
2633         int err;
2634
2635         team = team_nl_team_get(info);
2636         if (!team)
2637                 return -EINVAL;
2638
2639         err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2640                                          NLM_F_ACK, team_nl_send_unicast, NULL);
2641
2642         team_nl_team_put(team);
2643
2644         return err;
2645 }
2646
2647 static struct genl_ops team_nl_ops[] = {
2648         {
2649                 .cmd = TEAM_CMD_NOOP,
2650                 .doit = team_nl_cmd_noop,
2651                 .policy = team_nl_policy,
2652         },
2653         {
2654                 .cmd = TEAM_CMD_OPTIONS_SET,
2655                 .doit = team_nl_cmd_options_set,
2656                 .policy = team_nl_policy,
2657                 .flags = GENL_ADMIN_PERM,
2658         },
2659         {
2660                 .cmd = TEAM_CMD_OPTIONS_GET,
2661                 .doit = team_nl_cmd_options_get,
2662                 .policy = team_nl_policy,
2663                 .flags = GENL_ADMIN_PERM,
2664         },
2665         {
2666                 .cmd = TEAM_CMD_PORT_LIST_GET,
2667                 .doit = team_nl_cmd_port_list_get,
2668                 .policy = team_nl_policy,
2669                 .flags = GENL_ADMIN_PERM,
2670         },
2671 };
2672
2673 static struct genl_multicast_group team_change_event_mcgrp = {
2674         .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME,
2675 };
2676
2677 static int team_nl_send_multicast(struct sk_buff *skb,
2678                                   struct team *team, u32 portid)
2679 {
2680         return genlmsg_multicast_netns(dev_net(team->dev), skb, 0,
2681                                        team_change_event_mcgrp.id, GFP_KERNEL);
2682 }
2683
2684 static int team_nl_send_event_options_get(struct team *team,
2685                                           struct list_head *sel_opt_inst_list)
2686 {
2687         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2688                                         sel_opt_inst_list);
2689 }
2690
2691 static int team_nl_send_event_port_get(struct team *team,
2692                                        struct team_port *port)
2693 {
2694         return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2695                                           port);
2696 }
2697
2698 static int team_nl_init(void)
2699 {
2700         int err;
2701
2702         err = genl_register_family_with_ops(&team_nl_family, team_nl_ops,
2703                                             ARRAY_SIZE(team_nl_ops));
2704         if (err)
2705                 return err;
2706
2707         err = genl_register_mc_group(&team_nl_family, &team_change_event_mcgrp);
2708         if (err)
2709                 goto err_change_event_grp_reg;
2710
2711         return 0;
2712
2713 err_change_event_grp_reg:
2714         genl_unregister_family(&team_nl_family);
2715
2716         return err;
2717 }
2718
2719 static void team_nl_fini(void)
2720 {
2721         genl_unregister_family(&team_nl_family);
2722 }
2723
2724
2725 /******************
2726  * Change checkers
2727  ******************/
2728
2729 static void __team_options_change_check(struct team *team)
2730 {
2731         int err;
2732         struct team_option_inst *opt_inst;
2733         LIST_HEAD(sel_opt_inst_list);
2734
2735         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2736                 if (opt_inst->changed)
2737                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2738         }
2739         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2740         if (err && err != -ESRCH)
2741                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2742                             err);
2743 }
2744
2745 /* rtnl lock is held */
2746
2747 static void __team_port_change_send(struct team_port *port, bool linkup)
2748 {
2749         int err;
2750
2751         port->changed = true;
2752         port->state.linkup = linkup;
2753         team_refresh_port_linkup(port);
2754         if (linkup) {
2755                 struct ethtool_cmd ecmd;
2756
2757                 err = __ethtool_get_settings(port->dev, &ecmd);
2758                 if (!err) {
2759                         port->state.speed = ethtool_cmd_speed(&ecmd);
2760                         port->state.duplex = ecmd.duplex;
2761                         goto send_event;
2762                 }
2763         }
2764         port->state.speed = 0;
2765         port->state.duplex = 0;
2766
2767 send_event:
2768         err = team_nl_send_event_port_get(port->team, port);
2769         if (err && err != -ESRCH)
2770                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2771                             port->dev->name, err);
2772
2773 }
2774
2775 static void __team_carrier_check(struct team *team)
2776 {
2777         struct team_port *port;
2778         bool team_linkup;
2779
2780         if (team->user_carrier_enabled)
2781                 return;
2782
2783         team_linkup = false;
2784         list_for_each_entry(port, &team->port_list, list) {
2785                 if (port->linkup) {
2786                         team_linkup = true;
2787                         break;
2788                 }
2789         }
2790
2791         if (team_linkup)
2792                 netif_carrier_on(team->dev);
2793         else
2794                 netif_carrier_off(team->dev);
2795 }
2796
2797 static void __team_port_change_check(struct team_port *port, bool linkup)
2798 {
2799         if (port->state.linkup != linkup)
2800                 __team_port_change_send(port, linkup);
2801         __team_carrier_check(port->team);
2802 }
2803
2804 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2805 {
2806         __team_port_change_send(port, linkup);
2807         __team_carrier_check(port->team);
2808 }
2809
2810 static void __team_port_change_port_removed(struct team_port *port)
2811 {
2812         port->removed = true;
2813         __team_port_change_send(port, false);
2814         __team_carrier_check(port->team);
2815 }
2816
2817 static void team_port_change_check(struct team_port *port, bool linkup)
2818 {
2819         struct team *team = port->team;
2820
2821         mutex_lock(&team->lock);
2822         __team_port_change_check(port, linkup);
2823         mutex_unlock(&team->lock);
2824 }
2825
2826
2827 /************************************
2828  * Net device notifier event handler
2829  ************************************/
2830
2831 static int team_device_event(struct notifier_block *unused,
2832                              unsigned long event, void *ptr)
2833 {
2834         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2835         struct team_port *port;
2836
2837         port = team_port_get_rtnl(dev);
2838         if (!port)
2839                 return NOTIFY_DONE;
2840
2841         switch (event) {
2842         case NETDEV_UP:
2843                 if (netif_carrier_ok(dev))
2844                         team_port_change_check(port, true);
2845         case NETDEV_DOWN:
2846                 team_port_change_check(port, false);
2847         case NETDEV_CHANGE:
2848                 if (netif_running(port->dev))
2849                         team_port_change_check(port,
2850                                                !!netif_carrier_ok(port->dev));
2851                 break;
2852         case NETDEV_UNREGISTER:
2853                 team_del_slave(port->team->dev, dev);
2854                 break;
2855         case NETDEV_FEAT_CHANGE:
2856                 team_compute_features(port->team);
2857                 break;
2858         case NETDEV_CHANGEMTU:
2859                 /* Forbid to change mtu of underlaying device */
2860                 return NOTIFY_BAD;
2861         case NETDEV_PRE_TYPE_CHANGE:
2862                 /* Forbid to change type of underlaying device */
2863                 return NOTIFY_BAD;
2864         case NETDEV_RESEND_IGMP:
2865                 /* Propagate to master device */
2866                 call_netdevice_notifiers(event, port->team->dev);
2867                 break;
2868         }
2869         return NOTIFY_DONE;
2870 }
2871
2872 static struct notifier_block team_notifier_block __read_mostly = {
2873         .notifier_call = team_device_event,
2874 };
2875
2876
2877 /***********************
2878  * Module init and exit
2879  ***********************/
2880
2881 static int __init team_module_init(void)
2882 {
2883         int err;
2884
2885         register_netdevice_notifier(&team_notifier_block);
2886
2887         err = rtnl_link_register(&team_link_ops);
2888         if (err)
2889                 goto err_rtnl_reg;
2890
2891         err = team_nl_init();
2892         if (err)
2893                 goto err_nl_init;
2894
2895         return 0;
2896
2897 err_nl_init:
2898         rtnl_link_unregister(&team_link_ops);
2899
2900 err_rtnl_reg:
2901         unregister_netdevice_notifier(&team_notifier_block);
2902
2903         return err;
2904 }
2905
2906 static void __exit team_module_exit(void)
2907 {
2908         team_nl_fini();
2909         rtnl_link_unregister(&team_link_ops);
2910         unregister_netdevice_notifier(&team_notifier_block);
2911 }
2912
2913 module_init(team_module_init);
2914 module_exit(team_module_exit);
2915
2916 MODULE_LICENSE("GPL v2");
2917 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2918 MODULE_DESCRIPTION("Ethernet team device driver");
2919 MODULE_ALIAS_RTNL_LINK(DRV_NAME);