drivers/net/team/team.c

   1 /*
   2  * drivers/net/team/team.c - Network team device driver
   3  * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/types.h>
  13 #include <linux/module.h>
  14 #include <linux/init.h>
  15 #include <linux/slab.h>
  16 #include <linux/rcupdate.h>
  17 #include <linux/errno.h>
  18 #include <linux/ctype.h>
  19 #include <linux/notifier.h>
  20 #include <linux/netdevice.h>
  21 #include <linux/netpoll.h>
  22 #include <linux/if_vlan.h>
  23 #include <linux/if_arp.h>
  24 #include <linux/socket.h>
  25 #include <linux/etherdevice.h>
  26 #include <linux/rtnetlink.h>
  27 #include <net/rtnetlink.h>
  28 #include <net/genetlink.h>
  29 #include <net/netlink.h>
  30 #include <net/sch_generic.h>
  31 #include <net/switchdev.h>
  32 #include <generated/utsrelease.h>
  33 #include <linux/if_team.h>
  34
  35 #define DRV_NAME "team"
  36
  37
  38 /**********
  39  * Helpers
  40  **********/
  41
  42 #define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT)
  43
  44 static struct team_port *team_port_get_rcu(const struct net_device *dev)
  45 {
  46         return rcu_dereference(dev->rx_handler_data);
  47 }
  48
  49 static struct team_port *team_port_get_rtnl(const struct net_device *dev)
  50 {
  51         struct team_port *port = rtnl_dereference(dev->rx_handler_data);
  52
  53         return team_port_exists(dev) ? port : NULL;
  54 }
  55
  56 /*
  57  * Since the ability to change device address for open port device is tested in
  58  * team_port_add, this function can be called without control of return value
  59  */
  60 static int __set_port_dev_addr(struct net_device *port_dev,
  61                                const unsigned char *dev_addr)
  62 {
  63         struct sockaddr addr;
  64
  65         memcpy(addr.sa_data, dev_addr, port_dev->addr_len);
  66         addr.sa_family = port_dev->type;
  67         return dev_set_mac_address(port_dev, &addr);
  68 }
  69
  70 static int team_port_set_orig_dev_addr(struct team_port *port)
  71 {
  72         return __set_port_dev_addr(port->dev, port->orig.dev_addr);
  73 }
  74
  75 static int team_port_set_team_dev_addr(struct team *team,
  76                                        struct team_port *port)
  77 {
  78         return __set_port_dev_addr(port->dev, team->dev->dev_addr);
  79 }
  80
  81 int team_modeop_port_enter(struct team *team, struct team_port *port)
  82 {
  83         return team_port_set_team_dev_addr(team, port);
  84 }
  85 EXPORT_SYMBOL(team_modeop_port_enter);
  86
  87 void team_modeop_port_change_dev_addr(struct team *team,
  88                                       struct team_port *port)
  89 {
  90         team_port_set_team_dev_addr(team, port);
  91 }
  92 EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
  93
  94 static void team_lower_state_changed(struct team_port *port)
  95 {
  96         struct netdev_lag_lower_state_info info;
  97
  98         info.link_up = port->linkup;
  99         info.tx_enabled = team_port_enabled(port);
 100         netdev_lower_state_changed(port->dev, &info);
 101 }
 102
 103 static void team_refresh_port_linkup(struct team_port *port)
 104 {
 105         bool new_linkup = port->user.linkup_enabled ? port->user.linkup :
 106                                                       port->state.linkup;
 107
 108         if (port->linkup != new_linkup) {
 109                 port->linkup = new_linkup;
 110                 team_lower_state_changed(port);
 111         }
 112 }
 113
 114
 115 /*******************
 116  * Options handling
 117  *******************/
 118
 119 struct team_option_inst { /* One for each option instance */
 120         struct list_head list;
 121         struct list_head tmp_list;
 122         struct team_option *option;
 123         struct team_option_inst_info info;
 124         bool changed;
 125         bool removed;
 126 };
 127
 128 static struct team_option *__team_find_option(struct team *team,
 129                                               const char *opt_name)
 130 {
 131         struct team_option *option;
 132
 133         list_for_each_entry(option, &team->option_list, list) {
 134                 if (strcmp(option->name, opt_name) == 0)
 135                         return option;
 136         }
 137         return NULL;
 138 }
 139
 140 static void __team_option_inst_del(struct team_option_inst *opt_inst)
 141 {
 142         list_del(&opt_inst->list);
 143         kfree(opt_inst);
 144 }
 145
 146 static void __team_option_inst_del_option(struct team *team,
 147                                           struct team_option *option)
 148 {
 149         struct team_option_inst *opt_inst, *tmp;
 150
 151         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 152                 if (opt_inst->option == option)
 153                         __team_option_inst_del(opt_inst);
 154         }
 155 }
 156
 157 static int __team_option_inst_add(struct team *team, struct team_option *option,
 158                                   struct team_port *port)
 159 {
 160         struct team_option_inst *opt_inst;
 161         unsigned int array_size;
 162         unsigned int i;
 163         int err;
 164
 165         array_size = option->array_size;
 166         if (!array_size)
 167                 array_size = 1; /* No array but still need one instance */
 168
 169         for (i = 0; i < array_size; i++) {
 170                 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
 171                 if (!opt_inst)
 172                         return -ENOMEM;
 173                 opt_inst->option = option;
 174                 opt_inst->info.port = port;
 175                 opt_inst->info.array_index = i;
 176                 opt_inst->changed = true;
 177                 opt_inst->removed = false;
 178                 list_add_tail(&opt_inst->list, &team->option_inst_list);
 179                 if (option->init) {
 180                         err = option->init(team, &opt_inst->info);
 181                         if (err)
 182                                 return err;
 183                 }
 184
 185         }
 186         return 0;
 187 }
 188
 189 static int __team_option_inst_add_option(struct team *team,
 190                                          struct team_option *option)
 191 {
 192         int err;
 193
 194         if (!option->per_port) {
 195                 err = __team_option_inst_add(team, option, NULL);
 196                 if (err)
 197                         goto inst_del_option;
 198         }
 199         return 0;
 200
 201 inst_del_option:
 202         __team_option_inst_del_option(team, option);
 203         return err;
 204 }
 205
 206 static void __team_option_inst_mark_removed_option(struct team *team,
 207                                                    struct team_option *option)
 208 {
 209         struct team_option_inst *opt_inst;
 210
 211         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 212                 if (opt_inst->option == option) {
 213                         opt_inst->changed = true;
 214                         opt_inst->removed = true;
 215                 }
 216         }
 217 }
 218
 219 static void __team_option_inst_del_port(struct team *team,
 220                                         struct team_port *port)
 221 {
 222         struct team_option_inst *opt_inst, *tmp;
 223
 224         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 225                 if (opt_inst->option->per_port &&
 226                     opt_inst->info.port == port)
 227                         __team_option_inst_del(opt_inst);
 228         }
 229 }
 230
 231 static int __team_option_inst_add_port(struct team *team,
 232                                        struct team_port *port)
 233 {
 234         struct team_option *option;
 235         int err;
 236
 237         list_for_each_entry(option, &team->option_list, list) {
 238                 if (!option->per_port)
 239                         continue;
 240                 err = __team_option_inst_add(team, option, port);
 241                 if (err)
 242                         goto inst_del_port;
 243         }
 244         return 0;
 245
 246 inst_del_port:
 247         __team_option_inst_del_port(team, port);
 248         return err;
 249 }
 250
 251 static void __team_option_inst_mark_removed_port(struct team *team,
 252                                                  struct team_port *port)
 253 {
 254         struct team_option_inst *opt_inst;
 255
 256         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 257                 if (opt_inst->info.port == port) {
 258                         opt_inst->changed = true;
 259                         opt_inst->removed = true;
 260                 }
 261         }
 262 }
 263
 264 static int __team_options_register(struct team *team,
 265                                    const struct team_option *option,
 266                                    size_t option_count)
 267 {
 268         int i;
 269         struct team_option **dst_opts;
 270         int err;
 271
 272         dst_opts = kzalloc(sizeof(struct team_option *) * option_count,
 273                            GFP_KERNEL);
 274         if (!dst_opts)
 275                 return -ENOMEM;
 276         for (i = 0; i < option_count; i++, option++) {
 277                 if (__team_find_option(team, option->name)) {
 278                         err = -EEXIST;
 279                         goto alloc_rollback;
 280                 }
 281                 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
 282                 if (!dst_opts[i]) {
 283                         err = -ENOMEM;
 284                         goto alloc_rollback;
 285                 }
 286         }
 287
 288         for (i = 0; i < option_count; i++) {
 289                 err = __team_option_inst_add_option(team, dst_opts[i]);
 290                 if (err)
 291                         goto inst_rollback;
 292                 list_add_tail(&dst_opts[i]->list, &team->option_list);
 293         }
 294
 295         kfree(dst_opts);
 296         return 0;
 297
 298 inst_rollback:
 299         for (i--; i >= 0; i--)
 300                 __team_option_inst_del_option(team, dst_opts[i]);
 301
 302         i = option_count - 1;
 303 alloc_rollback:
 304         for (i--; i >= 0; i--)
 305                 kfree(dst_opts[i]);
 306
 307         kfree(dst_opts);
 308         return err;
 309 }
 310
 311 static void __team_options_mark_removed(struct team *team,
 312                                         const struct team_option *option,
 313                                         size_t option_count)
 314 {
 315         int i;
 316
 317         for (i = 0; i < option_count; i++, option++) {
 318                 struct team_option *del_opt;
 319
 320                 del_opt = __team_find_option(team, option->name);
 321                 if (del_opt)
 322                         __team_option_inst_mark_removed_option(team, del_opt);
 323         }
 324 }
 325
 326 static void __team_options_unregister(struct team *team,
 327                                       const struct team_option *option,
 328                                       size_t option_count)
 329 {
 330         int i;
 331
 332         for (i = 0; i < option_count; i++, option++) {
 333                 struct team_option *del_opt;
 334
 335                 del_opt = __team_find_option(team, option->name);
 336                 if (del_opt) {
 337                         __team_option_inst_del_option(team, del_opt);
 338                         list_del(&del_opt->list);
 339                         kfree(del_opt);
 340                 }
 341         }
 342 }
 343
 344 static void __team_options_change_check(struct team *team);
 345
 346 int team_options_register(struct team *team,
 347                           const struct team_option *option,
 348                           size_t option_count)
 349 {
 350         int err;
 351
 352         err = __team_options_register(team, option, option_count);
 353         if (err)
 354                 return err;
 355         __team_options_change_check(team);
 356         return 0;
 357 }
 358 EXPORT_SYMBOL(team_options_register);
 359
 360 void team_options_unregister(struct team *team,
 361                              const struct team_option *option,
 362                              size_t option_count)
 363 {
 364         __team_options_mark_removed(team, option, option_count);
 365         __team_options_change_check(team);
 366         __team_options_unregister(team, option, option_count);
 367 }
 368 EXPORT_SYMBOL(team_options_unregister);
 369
 370 static int team_option_get(struct team *team,
 371                            struct team_option_inst *opt_inst,
 372                            struct team_gsetter_ctx *ctx)
 373 {
 374         if (!opt_inst->option->getter)
 375                 return -EOPNOTSUPP;
 376         return opt_inst->option->getter(team, ctx);
 377 }
 378
 379 static int team_option_set(struct team *team,
 380                            struct team_option_inst *opt_inst,
 381                            struct team_gsetter_ctx *ctx)
 382 {
 383         if (!opt_inst->option->setter)
 384                 return -EOPNOTSUPP;
 385         return opt_inst->option->setter(team, ctx);
 386 }
 387
 388 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
 389 {
 390         struct team_option_inst *opt_inst;
 391
 392         opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
 393         opt_inst->changed = true;
 394 }
 395 EXPORT_SYMBOL(team_option_inst_set_change);
 396
 397 void team_options_change_check(struct team *team)
 398 {
 399         __team_options_change_check(team);
 400 }
 401 EXPORT_SYMBOL(team_options_change_check);
 402
 403
 404 /****************
 405  * Mode handling
 406  ****************/
 407
 408 static LIST_HEAD(mode_list);
 409 static DEFINE_SPINLOCK(mode_list_lock);
 410
 411 struct team_mode_item {
 412         struct list_head list;
 413         const struct team_mode *mode;
 414 };
 415
 416 static struct team_mode_item *__find_mode(const char *kind)
 417 {
 418         struct team_mode_item *mitem;
 419
 420         list_for_each_entry(mitem, &mode_list, list) {
 421                 if (strcmp(mitem->mode->kind, kind) == 0)
 422                         return mitem;
 423         }
 424         return NULL;
 425 }
 426
 427 static bool is_good_mode_name(const char *name)
 428 {
 429         while (*name != '\0') {
 430                 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
 431                         return false;
 432                 name++;
 433         }
 434         return true;
 435 }
 436
 437 int team_mode_register(const struct team_mode *mode)
 438 {
 439         int err = 0;
 440         struct team_mode_item *mitem;
 441
 442         if (!is_good_mode_name(mode->kind) ||
 443             mode->priv_size > TEAM_MODE_PRIV_SIZE)
 444                 return -EINVAL;
 445
 446         mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
 447         if (!mitem)
 448                 return -ENOMEM;
 449
 450         spin_lock(&mode_list_lock);
 451         if (__find_mode(mode->kind)) {
 452                 err = -EEXIST;
 453                 kfree(mitem);
 454                 goto unlock;
 455         }
 456         mitem->mode = mode;
 457         list_add_tail(&mitem->list, &mode_list);
 458 unlock:
 459         spin_unlock(&mode_list_lock);
 460         return err;
 461 }
 462 EXPORT_SYMBOL(team_mode_register);
 463
 464 void team_mode_unregister(const struct team_mode *mode)
 465 {
 466         struct team_mode_item *mitem;
 467
 468         spin_lock(&mode_list_lock);
 469         mitem = __find_mode(mode->kind);
 470         if (mitem) {
 471                 list_del_init(&mitem->list);
 472                 kfree(mitem);
 473         }
 474         spin_unlock(&mode_list_lock);
 475 }
 476 EXPORT_SYMBOL(team_mode_unregister);
 477
 478 static const struct team_mode *team_mode_get(const char *kind)
 479 {
 480         struct team_mode_item *mitem;
 481         const struct team_mode *mode = NULL;
 482
 483         spin_lock(&mode_list_lock);
 484         mitem = __find_mode(kind);
 485         if (!mitem) {
 486                 spin_unlock(&mode_list_lock);
 487                 request_module("team-mode-%s", kind);
 488                 spin_lock(&mode_list_lock);
 489                 mitem = __find_mode(kind);
 490         }
 491         if (mitem) {
 492                 mode = mitem->mode;
 493                 if (!try_module_get(mode->owner))
 494                         mode = NULL;
 495         }
 496
 497         spin_unlock(&mode_list_lock);
 498         return mode;
 499 }
 500
 501 static void team_mode_put(const struct team_mode *mode)
 502 {
 503         module_put(mode->owner);
 504 }
 505
 506 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
 507 {
 508         dev_kfree_skb_any(skb);
 509         return false;
 510 }
 511
 512 static rx_handler_result_t team_dummy_receive(struct team *team,
 513                                               struct team_port *port,
 514                                               struct sk_buff *skb)
 515 {
 516         return RX_HANDLER_ANOTHER;
 517 }
 518
 519 static const struct team_mode __team_no_mode = {
 520         .kind           = "*NOMODE*",
 521 };
 522
 523 static bool team_is_mode_set(struct team *team)
 524 {
 525         return team->mode != &__team_no_mode;
 526 }
 527
 528 static void team_set_no_mode(struct team *team)
 529 {
 530         team->user_carrier_enabled = false;
 531         team->mode = &__team_no_mode;
 532 }
 533
 534 static void team_adjust_ops(struct team *team)
 535 {
 536         /*
 537          * To avoid checks in rx/tx skb paths, ensure here that non-null and
 538          * correct ops are always set.
 539          */
 540
 541         if (!team->en_port_count || !team_is_mode_set(team) ||
 542             !team->mode->ops->transmit)
 543                 team->ops.transmit = team_dummy_transmit;
 544         else
 545                 team->ops.transmit = team->mode->ops->transmit;
 546
 547         if (!team->en_port_count || !team_is_mode_set(team) ||
 548             !team->mode->ops->receive)
 549                 team->ops.receive = team_dummy_receive;
 550         else
 551                 team->ops.receive = team->mode->ops->receive;
 552 }
 553
 554 /*
 555  * We can benefit from the fact that it's ensured no port is present
 556  * at the time of mode change. Therefore no packets are in fly so there's no
 557  * need to set mode operations in any special way.
 558  */
 559 static int __team_change_mode(struct team *team,
 560                               const struct team_mode *new_mode)
 561 {
 562         /* Check if mode was previously set and do cleanup if so */
 563         if (team_is_mode_set(team)) {
 564                 void (*exit_op)(struct team *team) = team->ops.exit;
 565
 566                 /* Clear ops area so no callback is called any longer */
 567                 memset(&team->ops, 0, sizeof(struct team_mode_ops));
 568                 team_adjust_ops(team);
 569
 570                 if (exit_op)
 571                         exit_op(team);
 572                 team_mode_put(team->mode);
 573                 team_set_no_mode(team);
 574                 /* zero private data area */
 575                 memset(&team->mode_priv, 0,
 576                        sizeof(struct team) - offsetof(struct team, mode_priv));
 577         }
 578
 579         if (!new_mode)
 580                 return 0;
 581
 582         if (new_mode->ops->init) {
 583                 int err;
 584
 585                 err = new_mode->ops->init(team);
 586                 if (err)
 587                         return err;
 588         }
 589
 590         team->mode = new_mode;
 591         memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
 592         team_adjust_ops(team);
 593
 594         return 0;
 595 }
 596
 597 static int team_change_mode(struct team *team, const char *kind)
 598 {
 599         const struct team_mode *new_mode;
 600         struct net_device *dev = team->dev;
 601         int err;
 602
 603         if (!list_empty(&team->port_list)) {
 604                 netdev_err(dev, "No ports can be present during mode change\n");
 605                 return -EBUSY;
 606         }
 607
 608         if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
 609                 netdev_err(dev, "Unable to change to the same mode the team is in\n");
 610                 return -EINVAL;
 611         }
 612
 613         new_mode = team_mode_get(kind);
 614         if (!new_mode) {
 615                 netdev_err(dev, "Mode \"%s\" not found\n", kind);
 616                 return -EINVAL;
 617         }
 618
 619         err = __team_change_mode(team, new_mode);
 620         if (err) {
 621                 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
 622                 team_mode_put(new_mode);
 623                 return err;
 624         }
 625
 626         netdev_info(dev, "Mode changed to \"%s\"\n", kind);
 627         return 0;
 628 }
 629
 630
 631 /*********************
 632  * Peers notification
 633  *********************/
 634
 635 static void team_notify_peers_work(struct work_struct *work)
 636 {
 637         struct team *team;
 638         int val;
 639
 640         team = container_of(work, struct team, notify_peers.dw.work);
 641
 642         if (!rtnl_trylock()) {
 643                 schedule_delayed_work(&team->notify_peers.dw, 0);
 644                 return;
 645         }
 646         val = atomic_dec_if_positive(&team->notify_peers.count_pending);
 647         if (val < 0) {
 648                 rtnl_unlock();
 649                 return;
 650         }
 651         call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
 652         rtnl_unlock();
 653         if (val)
 654                 schedule_delayed_work(&team->notify_peers.dw,
 655                                       msecs_to_jiffies(team->notify_peers.interval));
 656 }
 657
 658 static void team_notify_peers(struct team *team)
 659 {
 660         if (!team->notify_peers.count || !netif_running(team->dev))
 661                 return;
 662         atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
 663         schedule_delayed_work(&team->notify_peers.dw, 0);
 664 }
 665
 666 static void team_notify_peers_init(struct team *team)
 667 {
 668         INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
 669 }
 670
 671 static void team_notify_peers_fini(struct team *team)
 672 {
 673         cancel_delayed_work_sync(&team->notify_peers.dw);
 674 }
 675
 676
 677 /*******************************
 678  * Send multicast group rejoins
 679  *******************************/
 680
 681 static void team_mcast_rejoin_work(struct work_struct *work)
 682 {
 683         struct team *team;
 684         int val;
 685
 686         team = container_of(work, struct team, mcast_rejoin.dw.work);
 687
 688         if (!rtnl_trylock()) {
 689                 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 690                 return;
 691         }
 692         val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending);
 693         if (val < 0) {
 694                 rtnl_unlock();
 695                 return;
 696         }
 697         call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
 698         rtnl_unlock();
 699         if (val)
 700                 schedule_delayed_work(&team->mcast_rejoin.dw,
 701                                       msecs_to_jiffies(team->mcast_rejoin.interval));
 702 }
 703
 704 static void team_mcast_rejoin(struct team *team)
 705 {
 706         if (!team->mcast_rejoin.count || !netif_running(team->dev))
 707                 return;
 708         atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
 709         schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 710 }
 711
 712 static void team_mcast_rejoin_init(struct team *team)
 713 {
 714         INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
 715 }
 716
 717 static void team_mcast_rejoin_fini(struct team *team)
 718 {
 719         cancel_delayed_work_sync(&team->mcast_rejoin.dw);
 720 }
 721
 722
 723 /************************
 724  * Rx path frame handler
 725  ************************/
 726
 727 /* note: already called with rcu_read_lock */
 728 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
 729 {
 730         struct sk_buff *skb = *pskb;
 731         struct team_port *port;
 732         struct team *team;
 733         rx_handler_result_t res;
 734
 735         skb = skb_share_check(skb, GFP_ATOMIC);
 736         if (!skb)
 737                 return RX_HANDLER_CONSUMED;
 738
 739         *pskb = skb;
 740
 741         port = team_port_get_rcu(skb->dev);
 742         team = port->team;
 743         if (!team_port_enabled(port)) {
 744                 /* allow exact match delivery for disabled ports */
 745                 res = RX_HANDLER_EXACT;
 746         } else {
 747                 res = team->ops.receive(team, port, skb);
 748         }
 749         if (res == RX_HANDLER_ANOTHER) {
 750                 struct team_pcpu_stats *pcpu_stats;
 751
 752                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
 753                 u64_stats_update_begin(&pcpu_stats->syncp);
 754                 pcpu_stats->rx_packets++;
 755                 pcpu_stats->rx_bytes += skb->len;
 756                 if (skb->pkt_type == PACKET_MULTICAST)
 757                         pcpu_stats->rx_multicast++;
 758                 u64_stats_update_end(&pcpu_stats->syncp);
 759
 760                 skb->dev = team->dev;
 761         } else if (res == RX_HANDLER_EXACT) {
 762                 this_cpu_inc(team->pcpu_stats->rx_nohandler);
 763         } else {
 764                 this_cpu_inc(team->pcpu_stats->rx_dropped);
 765         }
 766
 767         return res;
 768 }
 769
 770
 771 /*************************************
 772  * Multiqueue Tx port select override
 773  *************************************/
 774
 775 static int team_queue_override_init(struct team *team)
 776 {
 777         struct list_head *listarr;
 778         unsigned int queue_cnt = team->dev->num_tx_queues - 1;
 779         unsigned int i;
 780
 781         if (!queue_cnt)
 782                 return 0;
 783         listarr = kmalloc(sizeof(struct list_head) * queue_cnt, GFP_KERNEL);
 784         if (!listarr)
 785                 return -ENOMEM;
 786         team->qom_lists = listarr;
 787         for (i = 0; i < queue_cnt; i++)
 788                 INIT_LIST_HEAD(listarr++);
 789         return 0;
 790 }
 791
 792 static void team_queue_override_fini(struct team *team)
 793 {
 794         kfree(team->qom_lists);
 795 }
 796
 797 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
 798 {
 799         return &team->qom_lists[queue_id - 1];
 800 }
 801
 802 /*
 803  * note: already called with rcu_read_lock
 804  */
 805 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
 806 {
 807         struct list_head *qom_list;
 808         struct team_port *port;
 809
 810         if (!team->queue_override_enabled || !skb->queue_mapping)
 811                 return false;
 812         qom_list = __team_get_qom_list(team, skb->queue_mapping);
 813         list_for_each_entry_rcu(port, qom_list, qom_list) {
 814                 if (!team_dev_queue_xmit(team, port, skb))
 815                         return true;
 816         }
 817         return false;
 818 }
 819
 820 static void __team_queue_override_port_del(struct team *team,
 821                                            struct team_port *port)
 822 {
 823         if (!port->queue_id)
 824                 return;
 825         list_del_rcu(&port->qom_list);
 826 }
 827
 828 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
 829                                                       struct team_port *cur)
 830 {
 831         if (port->priority < cur->priority)
 832                 return true;
 833         if (port->priority > cur->priority)
 834                 return false;
 835         if (port->index < cur->index)
 836                 return true;
 837         return false;
 838 }
 839
 840 static void __team_queue_override_port_add(struct team *team,
 841                                            struct team_port *port)
 842 {
 843         struct team_port *cur;
 844         struct list_head *qom_list;
 845         struct list_head *node;
 846
 847         if (!port->queue_id)
 848                 return;
 849         qom_list = __team_get_qom_list(team, port->queue_id);
 850         node = qom_list;
 851         list_for_each_entry(cur, qom_list, qom_list) {
 852                 if (team_queue_override_port_has_gt_prio_than(port, cur))
 853                         break;
 854                 node = &cur->qom_list;
 855         }
 856         list_add_tail_rcu(&port->qom_list, node);
 857 }
 858
 859 static void __team_queue_override_enabled_check(struct team *team)
 860 {
 861         struct team_port *port;
 862         bool enabled = false;
 863
 864         list_for_each_entry(port, &team->port_list, list) {
 865                 if (port->queue_id) {
 866                         enabled = true;
 867                         break;
 868                 }
 869         }
 870         if (enabled == team->queue_override_enabled)
 871                 return;
 872         netdev_dbg(team->dev, "%s queue override\n",
 873                    enabled ? "Enabling" : "Disabling");
 874         team->queue_override_enabled = enabled;
 875 }
 876
 877 static void team_queue_override_port_prio_changed(struct team *team,
 878                                                   struct team_port *port)
 879 {
 880         if (!port->queue_id || team_port_enabled(port))
 881                 return;
 882         __team_queue_override_port_del(team, port);
 883         __team_queue_override_port_add(team, port);
 884         __team_queue_override_enabled_check(team);
 885 }
 886
 887 static void team_queue_override_port_change_queue_id(struct team *team,
 888                                                      struct team_port *port,
 889                                                      u16 new_queue_id)
 890 {
 891         if (team_port_enabled(port)) {
 892                 __team_queue_override_port_del(team, port);
 893                 port->queue_id = new_queue_id;
 894                 __team_queue_override_port_add(team, port);
 895                 __team_queue_override_enabled_check(team);
 896         } else {
 897                 port->queue_id = new_queue_id;
 898         }
 899 }
 900
 901 static void team_queue_override_port_add(struct team *team,
 902                                          struct team_port *port)
 903 {
 904         __team_queue_override_port_add(team, port);
 905         __team_queue_override_enabled_check(team);
 906 }
 907
 908 static void team_queue_override_port_del(struct team *team,
 909                                          struct team_port *port)
 910 {
 911         __team_queue_override_port_del(team, port);
 912         __team_queue_override_enabled_check(team);
 913 }
 914
 915
 916 /****************
 917  * Port handling
 918  ****************/
 919
 920 static bool team_port_find(const struct team *team,
 921                            const struct team_port *port)
 922 {
 923         struct team_port *cur;
 924
 925         list_for_each_entry(cur, &team->port_list, list)
 926                 if (cur == port)
 927                         return true;
 928         return false;
 929 }
 930
 931 /*
 932  * Enable/disable port by adding to enabled port hashlist and setting
 933  * port->index (Might be racy so reader could see incorrect ifindex when
 934  * processing a flying packet, but that is not a problem). Write guarded
 935  * by team->lock.
 936  */
 937 static void team_port_enable(struct team *team,
 938                              struct team_port *port)
 939 {
 940         if (team_port_enabled(port))
 941                 return;
 942         port->index = team->en_port_count++;
 943         hlist_add_head_rcu(&port->hlist,
 944                            team_port_index_hash(team, port->index));
 945         team_adjust_ops(team);
 946         team_queue_override_port_add(team, port);
 947         if (team->ops.port_enabled)
 948                 team->ops.port_enabled(team, port);
 949         team_notify_peers(team);
 950         team_mcast_rejoin(team);
 951         team_lower_state_changed(port);
 952 }
 953
 954 static void __reconstruct_port_hlist(struct team *team, int rm_index)
 955 {
 956         int i;
 957         struct team_port *port;
 958
 959         for (i = rm_index + 1; i < team->en_port_count; i++) {
 960                 port = team_get_port_by_index(team, i);
 961                 hlist_del_rcu(&port->hlist);
 962                 port->index--;
 963                 hlist_add_head_rcu(&port->hlist,
 964                                    team_port_index_hash(team, port->index));
 965         }
 966 }
 967
 968 static void team_port_disable(struct team *team,
 969                               struct team_port *port)
 970 {
 971         if (!team_port_enabled(port))
 972                 return;
 973         if (team->ops.port_disabled)
 974                 team->ops.port_disabled(team, port);
 975         hlist_del_rcu(&port->hlist);
 976         __reconstruct_port_hlist(team, port->index);
 977         port->index = -1;
 978         team->en_port_count--;
 979         team_queue_override_port_del(team, port);
 980         team_adjust_ops(team);
 981         team_notify_peers(team);
 982         team_mcast_rejoin(team);
 983         team_lower_state_changed(port);
 984 }
 985
 986 #define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
 987                             NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
 988                             NETIF_F_HIGHDMA | NETIF_F_LRO)
 989
 990 #define TEAM_ENC_FEATURES       (NETIF_F_HW_CSUM | NETIF_F_SG | \
 991                                  NETIF_F_RXCSUM | NETIF_F_ALL_TSO)
 992
 993 static void ___team_compute_features(struct team *team)
 994 {
 995         struct team_port *port;
 996         u32 vlan_features = TEAM_VLAN_FEATURES & NETIF_F_ALL_FOR_ALL;
 997         netdev_features_t enc_features  = TEAM_ENC_FEATURES;
 998         unsigned short max_hard_header_len = ETH_HLEN;
 999         unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
1000                                         IFF_XMIT_DST_RELEASE_PERM;
1001
1002         list_for_each_entry(port, &team->port_list, list) {
1003                 vlan_features = netdev_increment_features(vlan_features,
1004                                         port->dev->vlan_features,
1005                                         TEAM_VLAN_FEATURES);
1006                 enc_features =
1007                         netdev_increment_features(enc_features,
1008                                                   port->dev->hw_enc_features,
1009                                                   TEAM_ENC_FEATURES);
1010
1011
1012                 dst_release_flag &= port->dev->priv_flags;
1013                 if (port->dev->hard_header_len > max_hard_header_len)
1014                         max_hard_header_len = port->dev->hard_header_len;
1015         }
1016
1017         team->dev->vlan_features = vlan_features;
1018         team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL;
1019         team->dev->hard_header_len = max_hard_header_len;
1020
1021         team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1022         if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1023                 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1024 }
1025
1026 static void __team_compute_features(struct team *team)
1027 {
1028         ___team_compute_features(team);
1029         netdev_change_features(team->dev);
1030 }
1031
1032 static void team_compute_features(struct team *team)
1033 {
1034         mutex_lock(&team->lock);
1035         ___team_compute_features(team);
1036         mutex_unlock(&team->lock);
1037         netdev_change_features(team->dev);
1038 }
1039
1040 static int team_port_enter(struct team *team, struct team_port *port)
1041 {
1042         int err = 0;
1043
1044         dev_hold(team->dev);
1045         if (team->ops.port_enter) {
1046                 err = team->ops.port_enter(team, port);
1047                 if (err) {
1048                         netdev_err(team->dev, "Device %s failed to enter team mode\n",
1049                                    port->dev->name);
1050                         goto err_port_enter;
1051                 }
1052         }
1053
1054         return 0;
1055
1056 err_port_enter:
1057         dev_put(team->dev);
1058
1059         return err;
1060 }
1061
1062 static void team_port_leave(struct team *team, struct team_port *port)
1063 {
1064         if (team->ops.port_leave)
1065                 team->ops.port_leave(team, port);
1066         dev_put(team->dev);
1067 }
1068
1069 #ifdef CONFIG_NET_POLL_CONTROLLER
1070 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1071 {
1072         struct netpoll *np;
1073         int err;
1074
1075         if (!team->dev->npinfo)
1076                 return 0;
1077
1078         np = kzalloc(sizeof(*np), GFP_KERNEL);
1079         if (!np)
1080                 return -ENOMEM;
1081
1082         err = __netpoll_setup(np, port->dev);
1083         if (err) {
1084                 kfree(np);
1085                 return err;
1086         }
1087         port->np = np;
1088         return err;
1089 }
1090
1091 static void team_port_disable_netpoll(struct team_port *port)
1092 {
1093         struct netpoll *np = port->np;
1094
1095         if (!np)
1096                 return;
1097         port->np = NULL;
1098
1099         /* Wait for transmitting packets to finish before freeing. */
1100         synchronize_rcu_bh();
1101         __netpoll_cleanup(np);
1102         kfree(np);
1103 }
1104 #else
1105 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1106 {
1107         return 0;
1108 }
1109 static void team_port_disable_netpoll(struct team_port *port)
1110 {
1111 }
1112 #endif
1113
1114 static int team_upper_dev_link(struct team *team, struct team_port *port)
1115 {
1116         struct netdev_lag_upper_info lag_upper_info;
1117         int err;
1118
1119         lag_upper_info.tx_type = team->mode->lag_tx_type;
1120         err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1121                                            &lag_upper_info);
1122         if (err)
1123                 return err;
1124         port->dev->priv_flags |= IFF_TEAM_PORT;
1125         return 0;
1126 }
1127
1128 static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1129 {
1130         netdev_upper_dev_unlink(port->dev, team->dev);
1131         port->dev->priv_flags &= ~IFF_TEAM_PORT;
1132 }
1133
1134 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1135 static int team_dev_type_check_change(struct net_device *dev,
1136                                       struct net_device *port_dev);
1137
1138 static int team_port_add(struct team *team, struct net_device *port_dev)
1139 {
1140         struct net_device *dev = team->dev;
1141         struct team_port *port;
1142         char *portname = port_dev->name;
1143         int err;
1144
1145         if (port_dev->flags & IFF_LOOPBACK) {
1146                 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1147                            portname);
1148                 return -EINVAL;
1149         }
1150
1151         if (team_port_exists(port_dev)) {
1152                 netdev_err(dev, "Device %s is already a port "
1153                                 "of a team device\n", portname);
1154                 return -EBUSY;
1155         }
1156
1157         if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1158             vlan_uses_dev(dev)) {
1159                 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1160                            portname);
1161                 return -EPERM;
1162         }
1163
1164         err = team_dev_type_check_change(dev, port_dev);
1165         if (err)
1166                 return err;
1167
1168         if (port_dev->flags & IFF_UP) {
1169                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1170                            portname);
1171                 return -EBUSY;
1172         }
1173
1174         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1175                        GFP_KERNEL);
1176         if (!port)
1177                 return -ENOMEM;
1178
1179         port->dev = port_dev;
1180         port->team = team;
1181         INIT_LIST_HEAD(&port->qom_list);
1182
1183         port->orig.mtu = port_dev->mtu;
1184         err = dev_set_mtu(port_dev, dev->mtu);
1185         if (err) {
1186                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1187                 goto err_set_mtu;
1188         }
1189
1190         memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1191
1192         err = team_port_enter(team, port);
1193         if (err) {
1194                 netdev_err(dev, "Device %s failed to enter team mode\n",
1195                            portname);
1196                 goto err_port_enter;
1197         }
1198
1199         err = dev_open(port_dev);
1200         if (err) {
1201                 netdev_dbg(dev, "Device %s opening failed\n",
1202                            portname);
1203                 goto err_dev_open;
1204         }
1205
1206         dev_uc_sync_multiple(port_dev, dev);
1207         dev_mc_sync_multiple(port_dev, dev);
1208
1209         err = vlan_vids_add_by_dev(port_dev, dev);
1210         if (err) {
1211                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1212                                 portname);
1213                 goto err_vids_add;
1214         }
1215
1216         err = team_port_enable_netpoll(team, port);
1217         if (err) {
1218                 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1219                            portname);
1220                 goto err_enable_netpoll;
1221         }
1222
1223         if (!(dev->features & NETIF_F_LRO))
1224                 dev_disable_lro(port_dev);
1225
1226         err = netdev_rx_handler_register(port_dev, team_handle_frame,
1227                                          port);
1228         if (err) {
1229                 netdev_err(dev, "Device %s failed to register rx_handler\n",
1230                            portname);
1231                 goto err_handler_register;
1232         }
1233
1234         err = team_upper_dev_link(team, port);
1235         if (err) {
1236                 netdev_err(dev, "Device %s failed to set upper link\n",
1237                            portname);
1238                 goto err_set_upper_link;
1239         }
1240
1241         err = __team_option_inst_add_port(team, port);
1242         if (err) {
1243                 netdev_err(dev, "Device %s failed to add per-port options\n",
1244                            portname);
1245                 goto err_option_port_add;
1246         }
1247
1248         port->index = -1;
1249         list_add_tail_rcu(&port->list, &team->port_list);
1250         team_port_enable(team, port);
1251         __team_compute_features(team);
1252         __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1253         __team_options_change_check(team);
1254
1255         netdev_info(dev, "Port device %s added\n", portname);
1256
1257         return 0;
1258
1259 err_option_port_add:
1260         team_upper_dev_unlink(team, port);
1261
1262 err_set_upper_link:
1263         netdev_rx_handler_unregister(port_dev);
1264
1265 err_handler_register:
1266         team_port_disable_netpoll(port);
1267
1268 err_enable_netpoll:
1269         vlan_vids_del_by_dev(port_dev, dev);
1270
1271 err_vids_add:
1272         dev_uc_unsync(port_dev, dev);
1273         dev_mc_unsync(port_dev, dev);
1274         dev_close(port_dev);
1275
1276 err_dev_open:
1277         team_port_leave(team, port);
1278         team_port_set_orig_dev_addr(port);
1279
1280 err_port_enter:
1281         dev_set_mtu(port_dev, port->orig.mtu);
1282
1283 err_set_mtu:
1284         kfree(port);
1285
1286         return err;
1287 }
1288
1289 static void __team_port_change_port_removed(struct team_port *port);
1290
1291 static int team_port_del(struct team *team, struct net_device *port_dev)
1292 {
1293         struct net_device *dev = team->dev;
1294         struct team_port *port;
1295         char *portname = port_dev->name;
1296
1297         port = team_port_get_rtnl(port_dev);
1298         if (!port || !team_port_find(team, port)) {
1299                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1300                            portname);
1301                 return -ENOENT;
1302         }
1303
1304         team_port_disable(team, port);
1305         list_del_rcu(&port->list);
1306         team_upper_dev_unlink(team, port);
1307         netdev_rx_handler_unregister(port_dev);
1308         team_port_disable_netpoll(port);
1309         vlan_vids_del_by_dev(port_dev, dev);
1310         dev_uc_unsync(port_dev, dev);
1311         dev_mc_unsync(port_dev, dev);
1312         dev_close(port_dev);
1313         team_port_leave(team, port);
1314
1315         __team_option_inst_mark_removed_port(team, port);
1316         __team_options_change_check(team);
1317         __team_option_inst_del_port(team, port);
1318         __team_port_change_port_removed(port);
1319
1320         team_port_set_orig_dev_addr(port);
1321         dev_set_mtu(port_dev, port->orig.mtu);
1322         kfree_rcu(port, rcu);
1323         netdev_info(dev, "Port device %s removed\n", portname);
1324         __team_compute_features(team);
1325
1326         return 0;
1327 }
1328
1329
1330 /*****************
1331  * Net device ops
1332  *****************/
1333
1334 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1335 {
1336         ctx->data.str_val = team->mode->kind;
1337         return 0;
1338 }
1339
1340 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1341 {
1342         return team_change_mode(team, ctx->data.str_val);
1343 }
1344
1345 static int team_notify_peers_count_get(struct team *team,
1346                                        struct team_gsetter_ctx *ctx)
1347 {
1348         ctx->data.u32_val = team->notify_peers.count;
1349         return 0;
1350 }
1351
1352 static int team_notify_peers_count_set(struct team *team,
1353                                        struct team_gsetter_ctx *ctx)
1354 {
1355         team->notify_peers.count = ctx->data.u32_val;
1356         return 0;
1357 }
1358
1359 static int team_notify_peers_interval_get(struct team *team,
1360                                           struct team_gsetter_ctx *ctx)
1361 {
1362         ctx->data.u32_val = team->notify_peers.interval;
1363         return 0;
1364 }
1365
1366 static int team_notify_peers_interval_set(struct team *team,
1367                                           struct team_gsetter_ctx *ctx)
1368 {
1369         team->notify_peers.interval = ctx->data.u32_val;
1370         return 0;
1371 }
1372
1373 static int team_mcast_rejoin_count_get(struct team *team,
1374                                        struct team_gsetter_ctx *ctx)
1375 {
1376         ctx->data.u32_val = team->mcast_rejoin.count;
1377         return 0;
1378 }
1379
1380 static int team_mcast_rejoin_count_set(struct team *team,
1381                                        struct team_gsetter_ctx *ctx)
1382 {
1383         team->mcast_rejoin.count = ctx->data.u32_val;
1384         return 0;
1385 }
1386
1387 static int team_mcast_rejoin_interval_get(struct team *team,
1388                                           struct team_gsetter_ctx *ctx)
1389 {
1390         ctx->data.u32_val = team->mcast_rejoin.interval;
1391         return 0;
1392 }
1393
1394 static int team_mcast_rejoin_interval_set(struct team *team,
1395                                           struct team_gsetter_ctx *ctx)
1396 {
1397         team->mcast_rejoin.interval = ctx->data.u32_val;
1398         return 0;
1399 }
1400
1401 static int team_port_en_option_get(struct team *team,
1402                                    struct team_gsetter_ctx *ctx)
1403 {
1404         struct team_port *port = ctx->info->port;
1405
1406         ctx->data.bool_val = team_port_enabled(port);
1407         return 0;
1408 }
1409
1410 static int team_port_en_option_set(struct team *team,
1411                                    struct team_gsetter_ctx *ctx)
1412 {
1413         struct team_port *port = ctx->info->port;
1414
1415         if (ctx->data.bool_val)
1416                 team_port_enable(team, port);
1417         else
1418                 team_port_disable(team, port);
1419         return 0;
1420 }
1421
1422 static int team_user_linkup_option_get(struct team *team,
1423                                        struct team_gsetter_ctx *ctx)
1424 {
1425         struct team_port *port = ctx->info->port;
1426
1427         ctx->data.bool_val = port->user.linkup;
1428         return 0;
1429 }
1430
1431 static void __team_carrier_check(struct team *team);
1432
1433 static int team_user_linkup_option_set(struct team *team,
1434                                        struct team_gsetter_ctx *ctx)
1435 {
1436         struct team_port *port = ctx->info->port;
1437
1438         port->user.linkup = ctx->data.bool_val;
1439         team_refresh_port_linkup(port);
1440         __team_carrier_check(port->team);
1441         return 0;
1442 }
1443
1444 static int team_user_linkup_en_option_get(struct team *team,
1445                                           struct team_gsetter_ctx *ctx)
1446 {
1447         struct team_port *port = ctx->info->port;
1448
1449         ctx->data.bool_val = port->user.linkup_enabled;
1450         return 0;
1451 }
1452
1453 static int team_user_linkup_en_option_set(struct team *team,
1454                                           struct team_gsetter_ctx *ctx)
1455 {
1456         struct team_port *port = ctx->info->port;
1457
1458         port->user.linkup_enabled = ctx->data.bool_val;
1459         team_refresh_port_linkup(port);
1460         __team_carrier_check(port->team);
1461         return 0;
1462 }
1463
1464 static int team_priority_option_get(struct team *team,
1465                                     struct team_gsetter_ctx *ctx)
1466 {
1467         struct team_port *port = ctx->info->port;
1468
1469         ctx->data.s32_val = port->priority;
1470         return 0;
1471 }
1472
1473 static int team_priority_option_set(struct team *team,
1474                                     struct team_gsetter_ctx *ctx)
1475 {
1476         struct team_port *port = ctx->info->port;
1477         s32 priority = ctx->data.s32_val;
1478
1479         if (port->priority == priority)
1480                 return 0;
1481         port->priority = priority;
1482         team_queue_override_port_prio_changed(team, port);
1483         return 0;
1484 }
1485
1486 static int team_queue_id_option_get(struct team *team,
1487                                     struct team_gsetter_ctx *ctx)
1488 {
1489         struct team_port *port = ctx->info->port;
1490
1491         ctx->data.u32_val = port->queue_id;
1492         return 0;
1493 }
1494
1495 static int team_queue_id_option_set(struct team *team,
1496                                     struct team_gsetter_ctx *ctx)
1497 {
1498         struct team_port *port = ctx->info->port;
1499         u16 new_queue_id = ctx->data.u32_val;
1500
1501         if (port->queue_id == new_queue_id)
1502                 return 0;
1503         if (new_queue_id >= team->dev->real_num_tx_queues)
1504                 return -EINVAL;
1505         team_queue_override_port_change_queue_id(team, port, new_queue_id);
1506         return 0;
1507 }
1508
1509 static const struct team_option team_options[] = {
1510         {
1511                 .name = "mode",
1512                 .type = TEAM_OPTION_TYPE_STRING,
1513                 .getter = team_mode_option_get,
1514                 .setter = team_mode_option_set,
1515         },
1516         {
1517                 .name = "notify_peers_count",
1518                 .type = TEAM_OPTION_TYPE_U32,
1519                 .getter = team_notify_peers_count_get,
1520                 .setter = team_notify_peers_count_set,
1521         },
1522         {
1523                 .name = "notify_peers_interval",
1524                 .type = TEAM_OPTION_TYPE_U32,
1525                 .getter = team_notify_peers_interval_get,
1526                 .setter = team_notify_peers_interval_set,
1527         },
1528         {
1529                 .name = "mcast_rejoin_count",
1530                 .type = TEAM_OPTION_TYPE_U32,
1531                 .getter = team_mcast_rejoin_count_get,
1532                 .setter = team_mcast_rejoin_count_set,
1533         },
1534         {
1535                 .name = "mcast_rejoin_interval",
1536                 .type = TEAM_OPTION_TYPE_U32,
1537                 .getter = team_mcast_rejoin_interval_get,
1538                 .setter = team_mcast_rejoin_interval_set,
1539         },
1540         {
1541                 .name = "enabled",
1542                 .type = TEAM_OPTION_TYPE_BOOL,
1543                 .per_port = true,
1544                 .getter = team_port_en_option_get,
1545                 .setter = team_port_en_option_set,
1546         },
1547         {
1548                 .name = "user_linkup",
1549                 .type = TEAM_OPTION_TYPE_BOOL,
1550                 .per_port = true,
1551                 .getter = team_user_linkup_option_get,
1552                 .setter = team_user_linkup_option_set,
1553         },
1554         {
1555                 .name = "user_linkup_enabled",
1556                 .type = TEAM_OPTION_TYPE_BOOL,
1557                 .per_port = true,
1558                 .getter = team_user_linkup_en_option_get,
1559                 .setter = team_user_linkup_en_option_set,
1560         },
1561         {
1562                 .name = "priority",
1563                 .type = TEAM_OPTION_TYPE_S32,
1564                 .per_port = true,
1565                 .getter = team_priority_option_get,
1566                 .setter = team_priority_option_set,
1567         },
1568         {
1569                 .name = "queue_id",
1570                 .type = TEAM_OPTION_TYPE_U32,
1571                 .per_port = true,
1572                 .getter = team_queue_id_option_get,
1573                 .setter = team_queue_id_option_set,
1574         },
1575 };
1576
1577 static struct lock_class_key team_netdev_xmit_lock_key;
1578 static struct lock_class_key team_netdev_addr_lock_key;
1579 static struct lock_class_key team_tx_busylock_key;
1580
1581 static void team_set_lockdep_class_one(struct net_device *dev,
1582                                        struct netdev_queue *txq,
1583                                        void *unused)
1584 {
1585         lockdep_set_class(&txq->_xmit_lock, &team_netdev_xmit_lock_key);
1586 }
1587
1588 static void team_set_lockdep_class(struct net_device *dev)
1589 {
1590         lockdep_set_class(&dev->addr_list_lock, &team_netdev_addr_lock_key);
1591         netdev_for_each_tx_queue(dev, team_set_lockdep_class_one, NULL);
1592         dev->qdisc_tx_busylock = &team_tx_busylock_key;
1593 }
1594
1595 static int team_init(struct net_device *dev)
1596 {
1597         struct team *team = netdev_priv(dev);
1598         int i;
1599         int err;
1600
1601         team->dev = dev;
1602         mutex_init(&team->lock);
1603         team_set_no_mode(team);
1604
1605         team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1606         if (!team->pcpu_stats)
1607                 return -ENOMEM;
1608
1609         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1610                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1611         INIT_LIST_HEAD(&team->port_list);
1612         err = team_queue_override_init(team);
1613         if (err)
1614                 goto err_team_queue_override_init;
1615
1616         team_adjust_ops(team);
1617
1618         INIT_LIST_HEAD(&team->option_list);
1619         INIT_LIST_HEAD(&team->option_inst_list);
1620
1621         team_notify_peers_init(team);
1622         team_mcast_rejoin_init(team);
1623
1624         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1625         if (err)
1626                 goto err_options_register;
1627         netif_carrier_off(dev);
1628
1629         team_set_lockdep_class(dev);
1630
1631         return 0;
1632
1633 err_options_register:
1634         team_mcast_rejoin_fini(team);
1635         team_notify_peers_fini(team);
1636         team_queue_override_fini(team);
1637 err_team_queue_override_init:
1638         free_percpu(team->pcpu_stats);
1639
1640         return err;
1641 }
1642
1643 static void team_uninit(struct net_device *dev)
1644 {
1645         struct team *team = netdev_priv(dev);
1646         struct team_port *port;
1647         struct team_port *tmp;
1648
1649         mutex_lock(&team->lock);
1650         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1651                 team_port_del(team, port->dev);
1652
1653         __team_change_mode(team, NULL); /* cleanup */
1654         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1655         team_mcast_rejoin_fini(team);
1656         team_notify_peers_fini(team);
1657         team_queue_override_fini(team);
1658         mutex_unlock(&team->lock);
1659 }
1660
1661 static void team_destructor(struct net_device *dev)
1662 {
1663         struct team *team = netdev_priv(dev);
1664
1665         free_percpu(team->pcpu_stats);
1666         free_netdev(dev);
1667 }
1668
1669 static int team_open(struct net_device *dev)
1670 {
1671         return 0;
1672 }
1673
1674 static int team_close(struct net_device *dev)
1675 {
1676         return 0;
1677 }
1678
1679 /*
1680  * note: already called with rcu_read_lock
1681  */
1682 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1683 {
1684         struct team *team = netdev_priv(dev);
1685         bool tx_success;
1686         unsigned int len = skb->len;
1687
1688         tx_success = team_queue_override_transmit(team, skb);
1689         if (!tx_success)
1690                 tx_success = team->ops.transmit(team, skb);
1691         if (tx_success) {
1692                 struct team_pcpu_stats *pcpu_stats;
1693
1694                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1695                 u64_stats_update_begin(&pcpu_stats->syncp);
1696                 pcpu_stats->tx_packets++;
1697                 pcpu_stats->tx_bytes += len;
1698                 u64_stats_update_end(&pcpu_stats->syncp);
1699         } else {
1700                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1701         }
1702
1703         return NETDEV_TX_OK;
1704 }
1705
1706 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1707                              void *accel_priv, select_queue_fallback_t fallback)
1708 {
1709         /*
1710          * This helper function exists to help dev_pick_tx get the correct
1711          * destination queue.  Using a helper function skips a call to
1712          * skb_tx_hash and will put the skbs in the queue we expect on their
1713          * way down to the team driver.
1714          */
1715         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1716
1717         /*
1718          * Save the original txq to restore before passing to the driver
1719          */
1720         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1721
1722         if (unlikely(txq >= dev->real_num_tx_queues)) {
1723                 do {
1724                         txq -= dev->real_num_tx_queues;
1725                 } while (txq >= dev->real_num_tx_queues);
1726         }
1727         return txq;
1728 }
1729
1730 static void team_change_rx_flags(struct net_device *dev, int change)
1731 {
1732         struct team *team = netdev_priv(dev);
1733         struct team_port *port;
1734         int inc;
1735
1736         rcu_read_lock();
1737         list_for_each_entry_rcu(port, &team->port_list, list) {
1738                 if (change & IFF_PROMISC) {
1739                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1740                         dev_set_promiscuity(port->dev, inc);
1741                 }
1742                 if (change & IFF_ALLMULTI) {
1743                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1744                         dev_set_allmulti(port->dev, inc);
1745                 }
1746         }
1747         rcu_read_unlock();
1748 }
1749
1750 static void team_set_rx_mode(struct net_device *dev)
1751 {
1752         struct team *team = netdev_priv(dev);
1753         struct team_port *port;
1754
1755         rcu_read_lock();
1756         list_for_each_entry_rcu(port, &team->port_list, list) {
1757                 dev_uc_sync_multiple(port->dev, dev);
1758                 dev_mc_sync_multiple(port->dev, dev);
1759         }
1760         rcu_read_unlock();
1761 }
1762
1763 static int team_set_mac_address(struct net_device *dev, void *p)
1764 {
1765         struct sockaddr *addr = p;
1766         struct team *team = netdev_priv(dev);
1767         struct team_port *port;
1768
1769         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1770                 return -EADDRNOTAVAIL;
1771         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1772         mutex_lock(&team->lock);
1773         list_for_each_entry(port, &team->port_list, list)
1774                 if (team->ops.port_change_dev_addr)
1775                         team->ops.port_change_dev_addr(team, port);
1776         mutex_unlock(&team->lock);
1777         return 0;
1778 }
1779
1780 static int team_change_mtu(struct net_device *dev, int new_mtu)
1781 {
1782         struct team *team = netdev_priv(dev);
1783         struct team_port *port;
1784         int err;
1785
1786         /*
1787          * Alhough this is reader, it's guarded by team lock. It's not possible
1788          * to traverse list in reverse under rcu_read_lock
1789          */
1790         mutex_lock(&team->lock);
1791         team->port_mtu_change_allowed = true;
1792         list_for_each_entry(port, &team->port_list, list) {
1793                 err = dev_set_mtu(port->dev, new_mtu);
1794                 if (err) {
1795                         netdev_err(dev, "Device %s failed to change mtu",
1796                                    port->dev->name);
1797                         goto unwind;
1798                 }
1799         }
1800         team->port_mtu_change_allowed = false;
1801         mutex_unlock(&team->lock);
1802
1803         dev->mtu = new_mtu;
1804
1805         return 0;
1806
1807 unwind:
1808         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1809                 dev_set_mtu(port->dev, dev->mtu);
1810         team->port_mtu_change_allowed = false;
1811         mutex_unlock(&team->lock);
1812
1813         return err;
1814 }
1815
1816 static struct rtnl_link_stats64 *
1817 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1818 {
1819         struct team *team = netdev_priv(dev);
1820         struct team_pcpu_stats *p;
1821         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1822         u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1823         unsigned int start;
1824         int i;
1825
1826         for_each_possible_cpu(i) {
1827                 p = per_cpu_ptr(team->pcpu_stats, i);
1828                 do {
1829                         start = u64_stats_fetch_begin_irq(&p->syncp);
1830                         rx_packets      = p->rx_packets;
1831                         rx_bytes        = p->rx_bytes;
1832                         rx_multicast    = p->rx_multicast;
1833                         tx_packets      = p->tx_packets;
1834                         tx_bytes        = p->tx_bytes;
1835                 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1836
1837                 stats->rx_packets       += rx_packets;
1838                 stats->rx_bytes         += rx_bytes;
1839                 stats->multicast        += rx_multicast;
1840                 stats->tx_packets       += tx_packets;
1841                 stats->tx_bytes         += tx_bytes;
1842                 /*
1843                  * rx_dropped, tx_dropped & rx_nohandler are u32,
1844                  * updated without syncp protection.
1845                  */
1846                 rx_dropped      += p->rx_dropped;
1847                 tx_dropped      += p->tx_dropped;
1848                 rx_nohandler    += p->rx_nohandler;
1849         }
1850         stats->rx_dropped       = rx_dropped;
1851         stats->tx_dropped       = tx_dropped;
1852         stats->rx_nohandler     = rx_nohandler;
1853         return stats;
1854 }
1855
1856 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1857 {
1858         struct team *team = netdev_priv(dev);
1859         struct team_port *port;
1860         int err;
1861
1862         /*
1863          * Alhough this is reader, it's guarded by team lock. It's not possible
1864          * to traverse list in reverse under rcu_read_lock
1865          */
1866         mutex_lock(&team->lock);
1867         list_for_each_entry(port, &team->port_list, list) {
1868                 err = vlan_vid_add(port->dev, proto, vid);
1869                 if (err)
1870                         goto unwind;
1871         }
1872         mutex_unlock(&team->lock);
1873
1874         return 0;
1875
1876 unwind:
1877         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1878                 vlan_vid_del(port->dev, proto, vid);
1879         mutex_unlock(&team->lock);
1880
1881         return err;
1882 }
1883
1884 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1885 {
1886         struct team *team = netdev_priv(dev);
1887         struct team_port *port;
1888
1889         mutex_lock(&team->lock);
1890         list_for_each_entry(port, &team->port_list, list)
1891                 vlan_vid_del(port->dev, proto, vid);
1892         mutex_unlock(&team->lock);
1893
1894         return 0;
1895 }
1896
1897 #ifdef CONFIG_NET_POLL_CONTROLLER
1898 static void team_poll_controller(struct net_device *dev)
1899 {
1900 }
1901
1902 static void __team_netpoll_cleanup(struct team *team)
1903 {
1904         struct team_port *port;
1905
1906         list_for_each_entry(port, &team->port_list, list)
1907                 team_port_disable_netpoll(port);
1908 }
1909
1910 static void team_netpoll_cleanup(struct net_device *dev)
1911 {
1912         struct team *team = netdev_priv(dev);
1913
1914         mutex_lock(&team->lock);
1915         __team_netpoll_cleanup(team);
1916         mutex_unlock(&team->lock);
1917 }
1918
1919 static int team_netpoll_setup(struct net_device *dev,
1920                               struct netpoll_info *npifo)
1921 {
1922         struct team *team = netdev_priv(dev);
1923         struct team_port *port;
1924         int err = 0;
1925
1926         mutex_lock(&team->lock);
1927         list_for_each_entry(port, &team->port_list, list) {
1928                 err = team_port_enable_netpoll(team, port);
1929                 if (err) {
1930                         __team_netpoll_cleanup(team);
1931                         break;
1932                 }
1933         }
1934         mutex_unlock(&team->lock);
1935         return err;
1936 }
1937 #endif
1938
1939 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1940 {
1941         struct team *team = netdev_priv(dev);
1942         int err;
1943
1944         mutex_lock(&team->lock);
1945         err = team_port_add(team, port_dev);
1946         mutex_unlock(&team->lock);
1947         return err;
1948 }
1949
1950 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1951 {
1952         struct team *team = netdev_priv(dev);
1953         int err;
1954
1955         mutex_lock(&team->lock);
1956         err = team_port_del(team, port_dev);
1957         mutex_unlock(&team->lock);
1958         return err;
1959 }
1960
1961 static netdev_features_t team_fix_features(struct net_device *dev,
1962                                            netdev_features_t features)
1963 {
1964         struct team_port *port;
1965         struct team *team = netdev_priv(dev);
1966         netdev_features_t mask;
1967
1968         mask = features;
1969         features &= ~NETIF_F_ONE_FOR_ALL;
1970         features |= NETIF_F_ALL_FOR_ALL;
1971
1972         rcu_read_lock();
1973         list_for_each_entry_rcu(port, &team->port_list, list) {
1974                 features = netdev_increment_features(features,
1975                                                      port->dev->features,
1976                                                      mask);
1977         }
1978         rcu_read_unlock();
1979
1980         features = netdev_add_tso_features(features, mask);
1981
1982         return features;
1983 }
1984
1985 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1986 {
1987         struct team *team = netdev_priv(dev);
1988
1989         team->user_carrier_enabled = true;
1990
1991         if (new_carrier)
1992                 netif_carrier_on(dev);
1993         else
1994                 netif_carrier_off(dev);
1995         return 0;
1996 }
1997
1998 static const struct net_device_ops team_netdev_ops = {
1999         .ndo_init               = team_init,
2000         .ndo_uninit             = team_uninit,
2001         .ndo_open               = team_open,
2002         .ndo_stop               = team_close,
2003         .ndo_start_xmit         = team_xmit,
2004         .ndo_select_queue       = team_select_queue,
2005         .ndo_change_rx_flags    = team_change_rx_flags,
2006         .ndo_set_rx_mode        = team_set_rx_mode,
2007         .ndo_set_mac_address    = team_set_mac_address,
2008         .ndo_change_mtu         = team_change_mtu,
2009         .ndo_get_stats64        = team_get_stats64,
2010         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
2011         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
2012 #ifdef CONFIG_NET_POLL_CONTROLLER
2013         .ndo_poll_controller    = team_poll_controller,
2014         .ndo_netpoll_setup      = team_netpoll_setup,
2015         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
2016 #endif
2017         .ndo_add_slave          = team_add_slave,
2018         .ndo_del_slave          = team_del_slave,
2019         .ndo_fix_features       = team_fix_features,
2020         .ndo_change_carrier     = team_change_carrier,
2021         .ndo_bridge_setlink     = switchdev_port_bridge_setlink,
2022         .ndo_bridge_getlink     = switchdev_port_bridge_getlink,
2023         .ndo_bridge_dellink     = switchdev_port_bridge_dellink,
2024         .ndo_fdb_add            = switchdev_port_fdb_add,
2025         .ndo_fdb_del            = switchdev_port_fdb_del,
2026         .ndo_fdb_dump           = switchdev_port_fdb_dump,
2027         .ndo_features_check     = passthru_features_check,
2028 };
2029
2030 /***********************
2031  * ethtool interface
2032  ***********************/
2033
2034 static void team_ethtool_get_drvinfo(struct net_device *dev,
2035                                      struct ethtool_drvinfo *drvinfo)
2036 {
2037         strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2038         strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2039 }
2040
2041 static const struct ethtool_ops team_ethtool_ops = {
2042         .get_drvinfo            = team_ethtool_get_drvinfo,
2043         .get_link               = ethtool_op_get_link,
2044 };
2045
2046 /***********************
2047  * rt netlink interface
2048  ***********************/
2049
2050 static void team_setup_by_port(struct net_device *dev,
2051                                struct net_device *port_dev)
2052 {
2053         dev->header_ops = port_dev->header_ops;
2054         dev->type = port_dev->type;
2055         dev->hard_header_len = port_dev->hard_header_len;
2056         dev->addr_len = port_dev->addr_len;
2057         dev->mtu = port_dev->mtu;
2058         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2059         eth_hw_addr_inherit(dev, port_dev);
2060 }
2061
2062 static int team_dev_type_check_change(struct net_device *dev,
2063                                       struct net_device *port_dev)
2064 {
2065         struct team *team = netdev_priv(dev);
2066         char *portname = port_dev->name;
2067         int err;
2068
2069         if (dev->type == port_dev->type)
2070                 return 0;
2071         if (!list_empty(&team->port_list)) {
2072                 netdev_err(dev, "Device %s is of different type\n", portname);
2073                 return -EBUSY;
2074         }
2075         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2076         err = notifier_to_errno(err);
2077         if (err) {
2078                 netdev_err(dev, "Refused to change device type\n");
2079                 return err;
2080         }
2081         dev_uc_flush(dev);
2082         dev_mc_flush(dev);
2083         team_setup_by_port(dev, port_dev);
2084         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2085         return 0;
2086 }
2087
2088 static void team_setup(struct net_device *dev)
2089 {
2090         ether_setup(dev);
2091
2092         dev->netdev_ops = &team_netdev_ops;
2093         dev->ethtool_ops = &team_ethtool_ops;
2094         dev->destructor = team_destructor;
2095         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2096         dev->priv_flags |= IFF_NO_QUEUE;
2097         dev->priv_flags |= IFF_TEAM;
2098
2099         /*
2100          * Indicate we support unicast address filtering. That way core won't
2101          * bring us to promisc mode in case a unicast addr is added.
2102          * Let this up to underlay drivers.
2103          */
2104         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2105
2106         dev->features |= NETIF_F_LLTX;
2107         dev->features |= NETIF_F_GRO;
2108
2109         /* Don't allow team devices to change network namespaces. */
2110         dev->features |= NETIF_F_NETNS_LOCAL;
2111
2112         dev->hw_features = TEAM_VLAN_FEATURES |
2113                            NETIF_F_HW_VLAN_CTAG_TX |
2114                            NETIF_F_HW_VLAN_CTAG_RX |
2115                            NETIF_F_HW_VLAN_CTAG_FILTER;
2116
2117         dev->hw_features |= NETIF_F_GSO_ENCAP_ALL;
2118         dev->features |= dev->hw_features;
2119 }
2120
2121 static int team_newlink(struct net *src_net, struct net_device *dev,
2122                         struct nlattr *tb[], struct nlattr *data[])
2123 {
2124         if (tb[IFLA_ADDRESS] == NULL)
2125                 eth_hw_addr_random(dev);
2126
2127         return register_netdevice(dev);
2128 }
2129
2130 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
2131 {
2132         if (tb[IFLA_ADDRESS]) {
2133                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2134                         return -EINVAL;
2135                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2136                         return -EADDRNOTAVAIL;
2137         }
2138         return 0;
2139 }
2140
2141 static unsigned int team_get_num_tx_queues(void)
2142 {
2143         return TEAM_DEFAULT_NUM_TX_QUEUES;
2144 }
2145
2146 static unsigned int team_get_num_rx_queues(void)
2147 {
2148         return TEAM_DEFAULT_NUM_RX_QUEUES;
2149 }
2150
2151 static struct rtnl_link_ops team_link_ops __read_mostly = {
2152         .kind                   = DRV_NAME,
2153         .priv_size              = sizeof(struct team),
2154         .setup                  = team_setup,
2155         .newlink                = team_newlink,
2156         .validate               = team_validate,
2157         .get_num_tx_queues      = team_get_num_tx_queues,
2158         .get_num_rx_queues      = team_get_num_rx_queues,
2159 };
2160
2161
2162 /***********************************
2163  * Generic netlink custom interface
2164  ***********************************/
2165
2166 static struct genl_family team_nl_family = {
2167         .id             = GENL_ID_GENERATE,
2168         .name           = TEAM_GENL_NAME,
2169         .version        = TEAM_GENL_VERSION,
2170         .maxattr        = TEAM_ATTR_MAX,
2171         .netnsok        = true,
2172 };
2173
2174 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2175         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
2176         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
2177         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
2178         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
2179 };
2180
2181 static const struct nla_policy
2182 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2183         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
2184         [TEAM_ATTR_OPTION_NAME] = {
2185                 .type = NLA_STRING,
2186                 .len = TEAM_STRING_MAX_LEN,
2187         },
2188         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
2189         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
2190         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
2191 };
2192
2193 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2194 {
2195         struct sk_buff *msg;
2196         void *hdr;
2197         int err;
2198
2199         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2200         if (!msg)
2201                 return -ENOMEM;
2202
2203         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2204                           &team_nl_family, 0, TEAM_CMD_NOOP);
2205         if (!hdr) {
2206                 err = -EMSGSIZE;
2207                 goto err_msg_put;
2208         }
2209
2210         genlmsg_end(msg, hdr);
2211
2212         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2213
2214 err_msg_put:
2215         nlmsg_free(msg);
2216
2217         return err;
2218 }
2219
2220 /*
2221  * Netlink cmd functions should be locked by following two functions.
2222  * Since dev gets held here, that ensures dev won't disappear in between.
2223  */
2224 static struct team *team_nl_team_get(struct genl_info *info)
2225 {
2226         struct net *net = genl_info_net(info);
2227         int ifindex;
2228         struct net_device *dev;
2229         struct team *team;
2230
2231         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2232                 return NULL;
2233
2234         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2235         dev = dev_get_by_index(net, ifindex);
2236         if (!dev || dev->netdev_ops != &team_netdev_ops) {
2237                 if (dev)
2238                         dev_put(dev);
2239                 return NULL;
2240         }
2241
2242         team = netdev_priv(dev);
2243         mutex_lock(&team->lock);
2244         return team;
2245 }
2246
2247 static void team_nl_team_put(struct team *team)
2248 {
2249         mutex_unlock(&team->lock);
2250         dev_put(team->dev);
2251 }
2252
2253 typedef int team_nl_send_func_t(struct sk_buff *skb,
2254                                 struct team *team, u32 portid);
2255
2256 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2257 {
2258         return genlmsg_unicast(dev_net(team->dev), skb, portid);
2259 }
2260
2261 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2262                                        struct team_option_inst *opt_inst)
2263 {
2264         struct nlattr *option_item;
2265         struct team_option *option = opt_inst->option;
2266         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2267         struct team_gsetter_ctx ctx;
2268         int err;
2269
2270         ctx.info = opt_inst_info;
2271         err = team_option_get(team, opt_inst, &ctx);
2272         if (err)
2273                 return err;
2274
2275         option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2276         if (!option_item)
2277                 return -EMSGSIZE;
2278
2279         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2280                 goto nest_cancel;
2281         if (opt_inst_info->port &&
2282             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2283                         opt_inst_info->port->dev->ifindex))
2284                 goto nest_cancel;
2285         if (opt_inst->option->array_size &&
2286             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2287                         opt_inst_info->array_index))
2288                 goto nest_cancel;
2289
2290         switch (option->type) {
2291         case TEAM_OPTION_TYPE_U32:
2292                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2293                         goto nest_cancel;
2294                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2295                         goto nest_cancel;
2296                 break;
2297         case TEAM_OPTION_TYPE_STRING:
2298                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2299                         goto nest_cancel;
2300                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2301                                    ctx.data.str_val))
2302                         goto nest_cancel;
2303                 break;
2304         case TEAM_OPTION_TYPE_BINARY:
2305                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2306                         goto nest_cancel;
2307                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2308                             ctx.data.bin_val.ptr))
2309                         goto nest_cancel;
2310                 break;
2311         case TEAM_OPTION_TYPE_BOOL:
2312                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2313                         goto nest_cancel;
2314                 if (ctx.data.bool_val &&
2315                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2316                         goto nest_cancel;
2317                 break;
2318         case TEAM_OPTION_TYPE_S32:
2319                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2320                         goto nest_cancel;
2321                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2322                         goto nest_cancel;
2323                 break;
2324         default:
2325                 BUG();
2326         }
2327         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2328                 goto nest_cancel;
2329         if (opt_inst->changed) {
2330                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2331                         goto nest_cancel;
2332                 opt_inst->changed = false;
2333         }
2334         nla_nest_end(skb, option_item);
2335         return 0;
2336
2337 nest_cancel:
2338         nla_nest_cancel(skb, option_item);
2339         return -EMSGSIZE;
2340 }
2341
2342 static int __send_and_alloc_skb(struct sk_buff **pskb,
2343                                 struct team *team, u32 portid,
2344                                 team_nl_send_func_t *send_func)
2345 {
2346         int err;
2347
2348         if (*pskb) {
2349                 err = send_func(*pskb, team, portid);
2350                 if (err)
2351                         return err;
2352         }
2353         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2354         if (!*pskb)
2355                 return -ENOMEM;
2356         return 0;
2357 }
2358
2359 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2360                                     int flags, team_nl_send_func_t *send_func,
2361                                     struct list_head *sel_opt_inst_list)
2362 {
2363         struct nlattr *option_list;
2364         struct nlmsghdr *nlh;
2365         void *hdr;
2366         struct team_option_inst *opt_inst;
2367         int err;
2368         struct sk_buff *skb = NULL;
2369         bool incomplete;
2370         int i;
2371
2372         opt_inst = list_first_entry(sel_opt_inst_list,
2373                                     struct team_option_inst, tmp_list);
2374
2375 start_again:
2376         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2377         if (err)
2378                 return err;
2379
2380         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2381                           TEAM_CMD_OPTIONS_GET);
2382         if (!hdr)
2383                 return -EMSGSIZE;
2384
2385         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2386                 goto nla_put_failure;
2387         option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2388         if (!option_list)
2389                 goto nla_put_failure;
2390
2391         i = 0;
2392         incomplete = false;
2393         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2394                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2395                 if (err) {
2396                         if (err == -EMSGSIZE) {
2397                                 if (!i)
2398                                         goto errout;
2399                                 incomplete = true;
2400                                 break;
2401                         }
2402                         goto errout;
2403                 }
2404                 i++;
2405         }
2406
2407         nla_nest_end(skb, option_list);
2408         genlmsg_end(skb, hdr);
2409         if (incomplete)
2410                 goto start_again;
2411
2412 send_done:
2413         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2414         if (!nlh) {
2415                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2416                 if (err)
2417                         goto errout;
2418                 goto send_done;
2419         }
2420
2421         return send_func(skb, team, portid);
2422
2423 nla_put_failure:
2424         err = -EMSGSIZE;
2425 errout:
2426         genlmsg_cancel(skb, hdr);
2427         nlmsg_free(skb);
2428         return err;
2429 }
2430
2431 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2432 {
2433         struct team *team;
2434         struct team_option_inst *opt_inst;
2435         int err;
2436         LIST_HEAD(sel_opt_inst_list);
2437
2438         team = team_nl_team_get(info);
2439         if (!team)
2440                 return -EINVAL;
2441
2442         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2443                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2444         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2445                                        NLM_F_ACK, team_nl_send_unicast,
2446                                        &sel_opt_inst_list);
2447
2448         team_nl_team_put(team);
2449
2450         return err;
2451 }
2452
2453 static int team_nl_send_event_options_get(struct team *team,
2454                                           struct list_head *sel_opt_inst_list);
2455
2456 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2457 {
2458         struct team *team;
2459         int err = 0;
2460         int i;
2461         struct nlattr *nl_option;
2462         LIST_HEAD(opt_inst_list);
2463
2464         rtnl_lock();
2465
2466         team = team_nl_team_get(info);
2467         if (!team) {
2468                 err = -EINVAL;
2469                 goto rtnl_unlock;
2470         }
2471
2472         err = -EINVAL;
2473         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2474                 err = -EINVAL;
2475                 goto team_put;
2476         }
2477
2478         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2479                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2480                 struct nlattr *attr;
2481                 struct nlattr *attr_data;
2482                 enum team_option_type opt_type;
2483                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2484                 u32 opt_array_index = 0;
2485                 bool opt_is_array = false;
2486                 struct team_option_inst *opt_inst;
2487                 char *opt_name;
2488                 bool opt_found = false;
2489
2490                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2491                         err = -EINVAL;
2492                         goto team_put;
2493                 }
2494                 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2495                                        nl_option, team_nl_option_policy);
2496                 if (err)
2497                         goto team_put;
2498                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2499                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2500                         err = -EINVAL;
2501                         goto team_put;
2502                 }
2503                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2504                 case NLA_U32:
2505                         opt_type = TEAM_OPTION_TYPE_U32;
2506                         break;
2507                 case NLA_STRING:
2508                         opt_type = TEAM_OPTION_TYPE_STRING;
2509                         break;
2510                 case NLA_BINARY:
2511                         opt_type = TEAM_OPTION_TYPE_BINARY;
2512                         break;
2513                 case NLA_FLAG:
2514                         opt_type = TEAM_OPTION_TYPE_BOOL;
2515                         break;
2516                 case NLA_S32:
2517                         opt_type = TEAM_OPTION_TYPE_S32;
2518                         break;
2519                 default:
2520                         goto team_put;
2521                 }
2522
2523                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2524                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2525                         err = -EINVAL;
2526                         goto team_put;
2527                 }
2528
2529                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2530                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2531                 if (attr)
2532                         opt_port_ifindex = nla_get_u32(attr);
2533
2534                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2535                 if (attr) {
2536                         opt_is_array = true;
2537                         opt_array_index = nla_get_u32(attr);
2538                 }
2539
2540                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2541                         struct team_option *option = opt_inst->option;
2542                         struct team_gsetter_ctx ctx;
2543                         struct team_option_inst_info *opt_inst_info;
2544                         int tmp_ifindex;
2545
2546                         opt_inst_info = &opt_inst->info;
2547                         tmp_ifindex = opt_inst_info->port ?
2548                                       opt_inst_info->port->dev->ifindex : 0;
2549                         if (option->type != opt_type ||
2550                             strcmp(option->name, opt_name) ||
2551                             tmp_ifindex != opt_port_ifindex ||
2552                             (option->array_size && !opt_is_array) ||
2553                             opt_inst_info->array_index != opt_array_index)
2554                                 continue;
2555                         opt_found = true;
2556                         ctx.info = opt_inst_info;
2557                         switch (opt_type) {
2558                         case TEAM_OPTION_TYPE_U32:
2559                                 ctx.data.u32_val = nla_get_u32(attr_data);
2560                                 break;
2561                         case TEAM_OPTION_TYPE_STRING:
2562                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2563                                         err = -EINVAL;
2564                                         goto team_put;
2565                                 }
2566                                 ctx.data.str_val = nla_data(attr_data);
2567                                 break;
2568                         case TEAM_OPTION_TYPE_BINARY:
2569                                 ctx.data.bin_val.len = nla_len(attr_data);
2570                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2571                                 break;
2572                         case TEAM_OPTION_TYPE_BOOL:
2573                                 ctx.data.bool_val = attr_data ? true : false;
2574                                 break;
2575                         case TEAM_OPTION_TYPE_S32:
2576                                 ctx.data.s32_val = nla_get_s32(attr_data);
2577                                 break;
2578                         default:
2579                                 BUG();
2580                         }
2581                         err = team_option_set(team, opt_inst, &ctx);
2582                         if (err)
2583                                 goto team_put;
2584                         opt_inst->changed = true;
2585                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2586                 }
2587                 if (!opt_found) {
2588                         err = -ENOENT;
2589                         goto team_put;
2590                 }
2591         }
2592
2593         err = team_nl_send_event_options_get(team, &opt_inst_list);
2594
2595 team_put:
2596         team_nl_team_put(team);
2597 rtnl_unlock:
2598         rtnl_unlock();
2599         return err;
2600 }
2601
2602 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2603                                      struct team_port *port)
2604 {
2605         struct nlattr *port_item;
2606
2607         port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2608         if (!port_item)
2609                 goto nest_cancel;
2610         if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2611                 goto nest_cancel;
2612         if (port->changed) {
2613                 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2614                         goto nest_cancel;
2615                 port->changed = false;
2616         }
2617         if ((port->removed &&
2618              nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2619             (port->state.linkup &&
2620              nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2621             nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2622             nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2623                 goto nest_cancel;
2624         nla_nest_end(skb, port_item);
2625         return 0;
2626
2627 nest_cancel:
2628         nla_nest_cancel(skb, port_item);
2629         return -EMSGSIZE;
2630 }
2631
2632 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2633                                       int flags, team_nl_send_func_t *send_func,
2634                                       struct team_port *one_port)
2635 {
2636         struct nlattr *port_list;
2637         struct nlmsghdr *nlh;
2638         void *hdr;
2639         struct team_port *port;
2640         int err;
2641         struct sk_buff *skb = NULL;
2642         bool incomplete;
2643         int i;
2644
2645         port = list_first_entry_or_null(&team->port_list,
2646                                         struct team_port, list);
2647
2648 start_again:
2649         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2650         if (err)
2651                 return err;
2652
2653         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2654                           TEAM_CMD_PORT_LIST_GET);
2655         if (!hdr)
2656                 return -EMSGSIZE;
2657
2658         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2659                 goto nla_put_failure;
2660         port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2661         if (!port_list)
2662                 goto nla_put_failure;
2663
2664         i = 0;
2665         incomplete = false;
2666
2667         /* If one port is selected, called wants to send port list containing
2668          * only this port. Otherwise go through all listed ports and send all
2669          */
2670         if (one_port) {
2671                 err = team_nl_fill_one_port_get(skb, one_port);
2672                 if (err)
2673                         goto errout;
2674         } else if (port) {
2675                 list_for_each_entry_from(port, &team->port_list, list) {
2676                         err = team_nl_fill_one_port_get(skb, port);
2677                         if (err) {
2678                                 if (err == -EMSGSIZE) {
2679                                         if (!i)
2680                                                 goto errout;
2681                                         incomplete = true;
2682                                         break;
2683                                 }
2684                                 goto errout;
2685                         }
2686                         i++;
2687                 }
2688         }
2689
2690         nla_nest_end(skb, port_list);
2691         genlmsg_end(skb, hdr);
2692         if (incomplete)
2693                 goto start_again;
2694
2695 send_done:
2696         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2697         if (!nlh) {
2698                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2699                 if (err)
2700                         goto errout;
2701                 goto send_done;
2702         }
2703
2704         return send_func(skb, team, portid);
2705
2706 nla_put_failure:
2707         err = -EMSGSIZE;
2708 errout:
2709         genlmsg_cancel(skb, hdr);
2710         nlmsg_free(skb);
2711         return err;
2712 }
2713
2714 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2715                                      struct genl_info *info)
2716 {
2717         struct team *team;
2718         int err;
2719
2720         team = team_nl_team_get(info);
2721         if (!team)
2722                 return -EINVAL;
2723
2724         err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2725                                          NLM_F_ACK, team_nl_send_unicast, NULL);
2726
2727         team_nl_team_put(team);
2728
2729         return err;
2730 }
2731
2732 static const struct genl_ops team_nl_ops[] = {
2733         {
2734                 .cmd = TEAM_CMD_NOOP,
2735                 .doit = team_nl_cmd_noop,
2736                 .policy = team_nl_policy,
2737         },
2738         {
2739                 .cmd = TEAM_CMD_OPTIONS_SET,
2740                 .doit = team_nl_cmd_options_set,
2741                 .policy = team_nl_policy,
2742                 .flags = GENL_ADMIN_PERM,
2743         },
2744         {
2745                 .cmd = TEAM_CMD_OPTIONS_GET,
2746                 .doit = team_nl_cmd_options_get,
2747                 .policy = team_nl_policy,
2748                 .flags = GENL_ADMIN_PERM,
2749         },
2750         {
2751                 .cmd = TEAM_CMD_PORT_LIST_GET,
2752                 .doit = team_nl_cmd_port_list_get,
2753                 .policy = team_nl_policy,
2754                 .flags = GENL_ADMIN_PERM,
2755         },
2756 };
2757
2758 static const struct genl_multicast_group team_nl_mcgrps[] = {
2759         { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2760 };
2761
2762 static int team_nl_send_multicast(struct sk_buff *skb,
2763                                   struct team *team, u32 portid)
2764 {
2765         return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2766                                        skb, 0, 0, GFP_KERNEL);
2767 }
2768
2769 static int team_nl_send_event_options_get(struct team *team,
2770                                           struct list_head *sel_opt_inst_list)
2771 {
2772         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2773                                         sel_opt_inst_list);
2774 }
2775
2776 static int team_nl_send_event_port_get(struct team *team,
2777                                        struct team_port *port)
2778 {
2779         return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2780                                           port);
2781 }
2782
2783 static int team_nl_init(void)
2784 {
2785         return genl_register_family_with_ops_groups(&team_nl_family, team_nl_ops,
2786                                                     team_nl_mcgrps);
2787 }
2788
2789 static void team_nl_fini(void)
2790 {
2791         genl_unregister_family(&team_nl_family);
2792 }
2793
2794
2795 /******************
2796  * Change checkers
2797  ******************/
2798
2799 static void __team_options_change_check(struct team *team)
2800 {
2801         int err;
2802         struct team_option_inst *opt_inst;
2803         LIST_HEAD(sel_opt_inst_list);
2804
2805         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2806                 if (opt_inst->changed)
2807                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2808         }
2809         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2810         if (err && err != -ESRCH)
2811                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2812                             err);
2813 }
2814
2815 /* rtnl lock is held */
2816
2817 static void __team_port_change_send(struct team_port *port, bool linkup)
2818 {
2819         int err;
2820
2821         port->changed = true;
2822         port->state.linkup = linkup;
2823         team_refresh_port_linkup(port);
2824         if (linkup) {
2825                 struct ethtool_link_ksettings ecmd;
2826
2827                 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2828                 if (!err) {
2829                         port->state.speed = ecmd.base.speed;
2830                         port->state.duplex = ecmd.base.duplex;
2831                         goto send_event;
2832                 }
2833         }
2834         port->state.speed = 0;
2835         port->state.duplex = 0;
2836
2837 send_event:
2838         err = team_nl_send_event_port_get(port->team, port);
2839         if (err && err != -ESRCH)
2840                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2841                             port->dev->name, err);
2842
2843 }
2844
2845 static void __team_carrier_check(struct team *team)
2846 {
2847         struct team_port *port;
2848         bool team_linkup;
2849
2850         if (team->user_carrier_enabled)
2851                 return;
2852
2853         team_linkup = false;
2854         list_for_each_entry(port, &team->port_list, list) {
2855                 if (port->linkup) {
2856                         team_linkup = true;
2857                         break;
2858                 }
2859         }
2860
2861         if (team_linkup)
2862                 netif_carrier_on(team->dev);
2863         else
2864                 netif_carrier_off(team->dev);
2865 }
2866
2867 static void __team_port_change_check(struct team_port *port, bool linkup)
2868 {
2869         if (port->state.linkup != linkup)
2870                 __team_port_change_send(port, linkup);
2871         __team_carrier_check(port->team);
2872 }
2873
2874 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2875 {
2876         __team_port_change_send(port, linkup);
2877         __team_carrier_check(port->team);
2878 }
2879
2880 static void __team_port_change_port_removed(struct team_port *port)
2881 {
2882         port->removed = true;
2883         __team_port_change_send(port, false);
2884         __team_carrier_check(port->team);
2885 }
2886
2887 static void team_port_change_check(struct team_port *port, bool linkup)
2888 {
2889         struct team *team = port->team;
2890
2891         mutex_lock(&team->lock);
2892         __team_port_change_check(port, linkup);
2893         mutex_unlock(&team->lock);
2894 }
2895
2896
2897 /************************************
2898  * Net device notifier event handler
2899  ************************************/
2900
2901 static int team_device_event(struct notifier_block *unused,
2902                              unsigned long event, void *ptr)
2903 {
2904         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2905         struct team_port *port;
2906
2907         port = team_port_get_rtnl(dev);
2908         if (!port)
2909                 return NOTIFY_DONE;
2910
2911         switch (event) {
2912         case NETDEV_UP:
2913                 if (netif_carrier_ok(dev))
2914                         team_port_change_check(port, true);
2915                 break;
2916         case NETDEV_DOWN:
2917                 team_port_change_check(port, false);
2918                 break;
2919         case NETDEV_CHANGE:
2920                 if (netif_running(port->dev))
2921                         team_port_change_check(port,
2922                                                !!netif_carrier_ok(port->dev));
2923                 break;
2924         case NETDEV_UNREGISTER:
2925                 team_del_slave(port->team->dev, dev);
2926                 break;
2927         case NETDEV_FEAT_CHANGE:
2928                 team_compute_features(port->team);
2929                 break;
2930         case NETDEV_PRECHANGEMTU:
2931                 /* Forbid to change mtu of underlaying device */
2932                 if (!port->team->port_mtu_change_allowed)
2933                         return NOTIFY_BAD;
2934                 break;
2935         case NETDEV_PRE_TYPE_CHANGE:
2936                 /* Forbid to change type of underlaying device */
2937                 return NOTIFY_BAD;
2938         case NETDEV_RESEND_IGMP:
2939                 /* Propagate to master device */
2940                 call_netdevice_notifiers(event, port->team->dev);
2941                 break;
2942         }
2943         return NOTIFY_DONE;
2944 }
2945
2946 static struct notifier_block team_notifier_block __read_mostly = {
2947         .notifier_call = team_device_event,
2948 };
2949
2950
2951 /***********************
2952  * Module init and exit
2953  ***********************/
2954
2955 static int __init team_module_init(void)
2956 {
2957         int err;
2958
2959         register_netdevice_notifier(&team_notifier_block);
2960
2961         err = rtnl_link_register(&team_link_ops);
2962         if (err)
2963                 goto err_rtnl_reg;
2964
2965         err = team_nl_init();
2966         if (err)
2967                 goto err_nl_init;
2968
2969         return 0;
2970
2971 err_nl_init:
2972         rtnl_link_unregister(&team_link_ops);
2973
2974 err_rtnl_reg:
2975         unregister_netdevice_notifier(&team_notifier_block);
2976
2977         return err;
2978 }
2979
2980 static void __exit team_module_exit(void)
2981 {
2982         team_nl_fini();
2983         rtnl_link_unregister(&team_link_ops);
2984         unregister_netdevice_notifier(&team_notifier_block);
2985 }
2986
2987 module_init(team_module_init);
2988 module_exit(team_module_exit);
2989
2990 MODULE_LICENSE("GPL v2");
2991 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2992 MODULE_DESCRIPTION("Ethernet team device driver");
2993 MODULE_ALIAS_RTNL_LINK(DRV_NAME);